Script started on 2024-10-03 00:50:31+00:00 [TERM="xterm-256color" TTY="/dev/pts/0" COLUMNS="-1" LINES="-1"]
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;           (set_option_value  prolog false)

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;           (set_option_value  compat auto)

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;           (set_option_value  compatio true)
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;            (is_cmd_option  prescan halt --halt=true true)
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;            (set_option_value  halt true)
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;            (is_cmd_option  prescan stdin --stdin=tty tty)
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;             (set_option_value  stdin tty)
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;            (is_cmd_option  prescan stdout --stdout=tty tty)
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;             (set_option_value  stdout tty)
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;            (is_cmd_option  prescan stderr --stderr=tty tty)
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;             (set_option_value  stderr tty)
P;HTML|
;            (set_option_value  prolog false)
P;HTML|
;            (set_option_value  compat auto)
P;HTML|
;            (set_option_value  compatio true)
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;          (is_cmd_option  execute python --python=enable enable)
P;HTML|
;           (set_option_value  python enable)
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;          (is_cmd_option  execute timeout --timeout=40 40)
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;           (set_option_value  timeout 40)
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;           (is_cmd_option  execute output --output=./reports/tests_output/baseline-compat-2024-10-03T00:33:59/ ./reports/tests_output/baseline-compat-2024-10-03T00:33:59/)
P;HTML|
;           (set_option_value  output ./reports/tests_output/baseline-compat-2024-10-03T00:33:59/)
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;           (is_cmd_option  execute html --html true)
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;            (set_option_value  html true)
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;           (is_cmd_option  execute test --test true)
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;            (set_option_value  test true)

; (load_metta_file  &self tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta)
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;                         (track_load_into_file  /home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta)
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;                                          (load_answer_file  /home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers /home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta)
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;                                           (= 1  "[(include! &corelib stdlib_minimal)]")
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;                                           (= 2  "[()]")
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;                                           (= 3  "[()]")
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;                                           (= 4  "[()]")
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;                                           (= 5  "[(Error (assertEqual (get-doc NoSuchAtom) (@doc-formal (@item NoSuchAtom) (@kind atom) (@type %Undefined%) (@desc \"No documentation\"))) ")
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;                                           (= 5  "Expected: [(@doc-formal (@item NoSuchAtom) (@kind atom) (@type %Undefined%) (@desc \"No documentation\"))]")
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;                                           (= 5  "Got: [(@doc-formal (@item NoSuchAtom) (@kind atom) (@type %Undefined%) (@desc \"No documentation\"))]")
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;                                           (= 6  "Missed result: (@doc-formal (@item NoSuchAtom) (@kind atom) (@type %Undefined%) (@desc \"No documentation\")))]")
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;                                           (= 6  "0.30user 0.01system 0:00.32elapsed 100%CPU (0avgtext+0avgdata 29212maxresident)k")
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;                                           (= 6  "0inputs+16outputs (0major+3794minor)pagefaults 0swaps")
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;                                         (= (error  (stream_error  (:  1805 (:  0 64295)) (syntax_error  unexpected_end_of_file "Unexpected end of file in list")))
;                                           (call  once
;                                             (load_metta_file_stream_fast  64329 read_metta2 /home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta &self (0x55aefe344370))))



  (error  
    (stream_error  
      (:  1805 
        (:  0 64295)) 
      (syntax_error  unexpected_end_of_file "Unexpected end of file in list")))




  (error  
    (stream_error  
      (:  1805 
        (:  0 64295)) 
      (syntax_error  unexpected_end_of_file "Unexpected end of file in list")))


 [193] call(prolog_stack:get_prolog_backtrace_lc,8000,[frame(193,clause((0x55aefbe32310),8),_3374)|_3366],P;HTML| [ goal_depth(600)]) at /usr/lib/swi-prolog/boot/init.pl:508
 [192] call(prolog_stack:call,get_prolog_backtrace_lc,8000,[frame(193,clause((0x55aefbe32310),8),call(prolog_stack:get_prolog_backtrace_lc,8000,[frame(193,clause((0x55aefbe32310),8),_3478)|_3470],P;HTML| [ goal_depth(600)])),frame(192,clause((0x55aefbe323c0),10),_3508)|_3500],P;HTML| [ goal_depth(600)]) at /usr/lib/swi-prolog/boot/init.pl:510
 [191] once(prolog_stack:call(call,get_prolog_backtrace_lc,8000,[frame(193,clause((0x55aefbe32310),8),call(prolog_stack:get_prolog_backtrace_lc,8000,[frame(193,clause((0x55aefbe32310),8),_3616)|_3608],P;HTML| [ goal_depth(600)])),frame(192,clause((0x55aefbe323c0),10),call(prolog_stack:call,get_prolog_backtrace_lc,8000,[frame(193,clause((0x55aefbe32310),8),call(...,8000,...,...)),frame(192,...,_3714)|_3706],P;HTML| [ goal_depth(600)])),frame(191,clause((0x55aefbe327e0),3),_3738)|_3730],P;HTML| [ goal_depth(600)])) at /usr/lib/swi-prolog/boot/init.pl:538
 [190] setup_call_cleanup(system:'$notrace'(12,0),system:once(prolog_stack:call(call,get_prolog_backtrace_lc,8000,[frame(193,clause((0x55aefbe32310),8),call(prolog_stack:get_prolog_backtrace_lc,8000,[frame(193,...,_3872)|_3864],P;HTML| [ goal_depth(600)])),frame(192,clause((0x55aefbe323c0),10),call(prolog_stack:call,get_prolog_backtrace_lc,8000,[...|...],P;HTML| [ ...])),frame(191,clause((0x55aefbe327e0),3),once(...)),frame(190,...,_3970)|_3962],P;HTML| [ goal_depth(600)])),system:'$restore_trace'(12,0)) at /usr/lib/swi-prolog/boot/init.pl:682
 [188] logicmoo_startup:ds at /home/runner/work/metta-wam/metta-wam/src/packs/logicmoo_utils/prolog/logicmoo_startup.pl:1043
 [187] logicmoo_startup:bt at /home/runner/work/metta-wam/metta-wam/src/packs/logicmoo_utils/prolog/logicmoo_startup.pl:1038
 [186] catch(user:bt,_4070,user:true) at /usr/lib/swi-prolog/boot/init.pl:565
 [185] ignore(user:catch(bt,_4120,true)) at /usr/lib/swi-prolog/boot/init.pl:547
 [183] ugtrace(error(error(stream_error(1805:0:64295,syntax_error(unexpected_end_of_file,"Unexpected end of file in list")))),user:call(user:once,user:load_metta_file_stream_fast(64329,read_metta2,P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370)))) at /home/runner/work/metta-wam/metta-wam/src/canary/metta_utils.pl:376
 [181] catch('','','') at /usr/lib/swi-prolog/boot/init.pl:565
 [178] ''('') 
 [177] setup_call_cleanup(user:nop(trace(user:load_metta_file_stream_fast/5,+fail)),user:(must_not_error(call(user:once,user:load_metta_file_stream_fast(64329,read_metta2,P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370))))*->true;md_failed(user:once,user:load_metta_file_stream_fast(64329,read_metta2,P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370)))),user:nop(trace(user:load_metta_file_stream_fast/5,-fail))) at /usr/lib/swi-prolog/boot/init.pl:682
 [176] must_det_ll1('','') at /home/runner/work/metta-wam/metta-wam/src/canary/metta_utils.pl:304
 [175] catch(user:must_det_ll1(once,user:load_metta_file_stream_fast(64329,read_metta2,P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370))),md_failed(once,_4542,_4544),user:(_4572 is _4578-1,_4584>0->throw(md_failed(once,_4596,_4598));ugtrace(md_failed(once,_4616,_4618),user:load_metta_file_stream_fast(64329,read_metta2,P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370))),throw('$aborted'))) at /usr/lib/swi-prolog/boot/init.pl:565
 [173] md(once,'') at /home/runner/work/metta-wam/metta-wam/src/canary/metta_utils.pl:294
 [170] setup_call_cleanup(user:set_option_value(loading_file,P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'),user:((must_det_ll(set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',1)),must_det_ll(load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),must_det_ll(set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',0))),must_det_ll(load_metta_file_stream_fast(64329,read_metta2,P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370)))),user:set_option_value(loading_file,P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')) at /usr/lib/swi-prolog/boot/init.pl:682
 [167] once('') at /usr/lib/swi-prolog/boot/init.pl:538
 [166] call('','') at /usr/lib/swi-prolog/boot/init.pl:504
 [165] catch(user:call(user:once,user:load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370))),_4862,user:(fbug(_4916=user:call(user:once,user:load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370)))),ugtrace(error(_4960),user:call(user:once,user:load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370)))))) at /usr/lib/swi-prolog/boot/init.pl:565
 [162] ''('') 
 [161] setup_call_cleanup(user:nop(trace(user:load_metta_file_stream/3,+fail)),user:(must_not_error(call(user:once,user:load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370))))*->true;md_failed(user:once,user:load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370)))),user:nop(trace(user:load_metta_file_stream/3,-fail))) at /usr/lib/swi-prolog/boot/init.pl:682
 [160] must_det_ll1('','') at /home/runner/work/metta-wam/metta-wam/src/canary/metta_utils.pl:304
 [159] catch(user:must_det_ll1(once,user:load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370))),md_failed(once,_5278,_5280),user:(_5308 is _5314-1,_5320>0->throw(md_failed(once,_5332,_5334));ugtrace(md_failed(once,_5352,_5354),user:load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370))),throw('$aborted'))) at /usr/lib/swi-prolog/boot/init.pl:565
 [157] md(once,'') at /home/runner/work/metta-wam/metta-wam/src/canary/metta_utils.pl:294
 [155] setup_call_cleanup(user:open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',read,(0x55aefe344370),P;HTML| [ encoding(utf8)]),user:must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370))),user:close((0x55aefe344370))) at /usr/lib/swi-prolog/boot/init.pl:682
 [154] once('') at /usr/lib/swi-prolog/boot/init.pl:538
 [153] call('','') at /usr/lib/swi-prolog/boot/init.pl:504
 [152] catch(user:call(user:once,user:setup_call_cleanup(open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',read,(0x55aefe344370),P;HTML| [ encoding(utf8)]),must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370))),close((0x55aefe344370)))),_5556,user:(fbug(_5646=user:call(user:once,user:setup_call_cleanup(open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',read,(0x55aefe344370),...),must_det_ll(...),close((0x55aefe344370))))),ugtrace(error(_5708),user:call(user:once,user:setup_call_cleanup(open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',read,(0x55aefe344370),P;HTML| [ ...]),must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370))),close((0x55aefe344370))))))) at /usr/lib/swi-prolog/boot/init.pl:565
 [149] ''('') 
 [148] setup_call_cleanup(user:nop(trace(user:setup_call_cleanup/3,+fail)),user:(must_not_error(call(user:once,user:setup_call_cleanup(open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',read,(0x55aefe344370),P;HTML| [ ...]),must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370))),close((0x55aefe344370)))))*->true;md_failed(user:once,user:setup_call_cleanup(open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',read,(0x55aefe344370),P;HTML| [ encoding(utf8)]),must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370))),close((0x55aefe344370))))),user:nop(trace(user:setup_call_cleanup/3,-fail))) at /usr/lib/swi-prolog/boot/init.pl:682
 [147] must_det_ll1('','') at /home/runner/work/metta-wam/metta-wam/src/canary/metta_utils.pl:304
 [146] catch(user:must_det_ll1(once,user:setup_call_cleanup(open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',read,(0x55aefe344370),P;HTML| [ encoding(utf8)]),must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370))),close((0x55aefe344370)))),md_failed(once,_6162,_6164),user:(_6192 is _6198-1,_6204>0->throw(md_failed(once,_6216,_6218));ugtrace(md_failed(once,_6236,_6238),user:setup_call_cleanup(open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',read,(0x55aefe344370),P;HTML| [ encoding(utf8)]),must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370))),close((0x55aefe344370)))),throw('$aborted'))) at /usr/lib/swi-prolog/boot/init.pl:565
 [144] md(once,'') at /home/runner/work/metta-wam/metta-wam/src/canary/metta_utils.pl:294
 [142] setup_call_cleanup(user:working_directory('/home/runner/work/metta-wam/metta-wam/','/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'),user:must_det_ll(setup_call_cleanup(open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',read,(0x55aefe344370),P;HTML| [ encoding(utf8)]),must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370))),close((0x55aefe344370)))),user:working_directory(_6422,'/home/runner/work/metta-wam/metta-wam/')) at /usr/lib/swi-prolog/boot/init.pl:682
 [139] once('') at /usr/lib/swi-prolog/boot/init.pl:538
 [138] call('','') at /usr/lib/swi-prolog/boot/init.pl:504
 [137] catch(user:call(user:once,user:include_metta_directory_file('&self','/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta',P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),_6500,user:(fbug(_6554=user:call(user:once,user:include_metta_directory_file('&self','/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta',P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),ugtrace(error(_6598),user:call(user:once,user:include_metta_directory_file('&self','/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta',P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))))) at /usr/lib/swi-prolog/boot/init.pl:565
 [134] ''('') 
 [133] setup_call_cleanup(user:nop(trace(user:include_metta_directory_file/3,+fail)),user:(must_not_error(call(user:once,user:include_metta_directory_file('&self','/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta',P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))*->true;md_failed(user:once,user:include_metta_directory_file('&self','/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta',P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),user:nop(trace(user:include_metta_directory_file/3,-fail))) at /usr/lib/swi-prolog/boot/init.pl:682
 [132] must_det_ll1('','') at /home/runner/work/metta-wam/metta-wam/src/canary/metta_utils.pl:304
 [131] catch(user:must_det_ll1(once,user:include_metta_directory_file('&self','/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta',P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),md_failed(once,_6916,_6918),user:(_6946 is _6952-1,_6958>0->throw(md_failed(once,_6970,_6972));ugtrace(md_failed(once,_6990,_6992),user:include_metta_directory_file('&self','/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta',P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),throw('$aborted'))) at /usr/lib/swi-prolog/boot/init.pl:565
 [129] md(once,'') at /home/runner/work/metta-wam/metta-wam/src/canary/metta_utils.pl:294
 [127] include_metta1('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta') at /home/runner/work/metta-wam/metta-wam/src/canary/metta_loader.pl:396
 [126] call('') at /usr/lib/swi-prolog/boot/init.pl:502
 [125] setup_call_cleanup(user:nb_setval('$circular_goals',P;HTML|[ 
                                                             include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), 
                                                             load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')]),user:call(include_metta1('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),user:(nb_current('$circular_goals',_7184),select(include_metta1('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'),_7196,_7198),nb_setval('$circular_goals',_7210))) at /usr/lib/swi-prolog/boot/init.pl:682
 [121] once('') at /usr/lib/swi-prolog/boot/init.pl:538
 [120] call('','') at /usr/lib/swi-prolog/boot/init.pl:504
 [119] catch(user:call(user:once,user:include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),_7286,user:(fbug(_7338=user:call(user:once,user:include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),ugtrace(error(_7380),user:call(user:once,user:include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))))) at /usr/lib/swi-prolog/boot/init.pl:565
 [116] ''('') 
 [115] setup_call_cleanup(user:nop(trace(user:include_metta/2,+fail)),user:(must_not_error(call(user:once,user:include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))*->true;md_failed(user:once,user:include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),user:nop(trace(user:include_metta/2,-fail))) at /usr/lib/swi-prolog/boot/init.pl:682
 [114] must_det_ll1('','') at /home/runner/work/metta-wam/metta-wam/src/canary/metta_utils.pl:304
 [113] catch(user:must_det_ll1(once,user:include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),md_failed(once,_7690,_7692),user:(_7720 is _7726-1,_7732>0->throw(md_failed(once,_7744,_7746));ugtrace(md_failed(once,_7764,_7766),user:include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),throw('$aborted'))) at /usr/lib/swi-prolog/boot/init.pl:565
 [111] md(once,'') at /home/runner/work/metta-wam/metta-wam/src/canary/metta_utils.pl:294
 [109] catch(user:must_det_ll(include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),_7834,prolog_statistics:(report(time{cpu:4.007522529,inferences:24394390,wall:1727916635.714776},10),throw(_7890))) at /usr/lib/swi-prolog/boot/init.pl:565
 [108] call_cleanup(prolog_statistics:catch(user:must_det_ll(include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),_7928,(report(time{cpu:4.007522529,inferences:24394390,wall:1727916635.714776},10),throw(_7978))),prolog_statistics:(_7988=true)) at /usr/lib/swi-prolog/boot/init.pl:685
 [107] prolog_statistics:time('') at /usr/lib/swi-prolog/library/statistics.pl:287
 [106] setup_call_cleanup(user:set_option_value(loading_file,P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'),user:time(must_det_ll(include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),user:set_option_value(loading_file,[])) at /usr/lib/swi-prolog/boot/init.pl:682
 [104] once('') at /usr/lib/swi-prolog/boot/init.pl:538
 [103] call('','') at /usr/lib/swi-prolog/boot/init.pl:504
 [102] catch(user:call(user:once,user:with_option(loading_file,P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',time(must_det_ll(include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))))),_8168,user:(fbug(_8236=user:call(user:once,user:with_option(loading_file,P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',time(...)))),ugtrace(error(_8284),user:call(user:once,user:with_option(loading_file,P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',time(must_det_ll(...))))))) at /usr/lib/swi-prolog/boot/init.pl:565
  [99] ''('') 
  [98] setup_call_cleanup(user:nop(trace(user:with_option/3,+fail)),user:(must_not_error(call(user:once,user:with_option(loading_file,P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',time(must_det_ll(...)))))*->true;md_failed(user:once,user:with_option(loading_file,P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',time(must_det_ll(include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))))),user:nop(trace(user:with_option/3,-fail))) at /usr/lib/swi-prolog/boot/init.pl:682
  [97] must_det_ll1('','') at /home/runner/work/metta-wam/metta-wam/src/canary/metta_utils.pl:304
  [96] catch(user:must_det_ll1(once,user:with_option(loading_file,P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',time(must_det_ll(include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))))),md_failed(once,_8444,_8446),user:(_8474 is _8480-1,_8486>0->throw(md_failed(once,_8498,_8500));ugtrace(md_failed(once,_8518,_8520),user:with_option(loading_file,P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',time(must_det_ll(include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))))),throw('$aborted'))) at /usr/lib/swi-prolog/boot/init.pl:565
  [94] md(once,'') at /home/runner/work/metta-wam/metta-wam/src/canary/metta_utils.pl:294
  [92] track_load_into_file0(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','') at /home/runner/work/metta-wam/metta-wam/library/genome/flybase_loader.pl:1010
  [91] once('') at /usr/lib/swi-prolog/boot/init.pl:538
  [90] call('','') at /usr/lib/swi-prolog/boot/init.pl:504
  [89] catch(user:call(user:once,user:track_load_into_file0(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),_8680,user:(fbug(_8738=user:call(user:once,user:track_load_into_file0(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))),ugtrace(error(_8786),user:call(user:once,user:track_load_into_file0(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))))) at /usr/lib/swi-prolog/boot/init.pl:565
  [86] ''('') 
  [85] setup_call_cleanup(user:nop(trace(user:track_load_into_file0/2,+fail)),user:(must_not_error(call(user:once,user:track_load_into_file0(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))))*->true;md_failed(user:once,user:track_load_into_file0(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))),user:nop(trace(user:track_load_into_file0/2,-fail))) at /usr/lib/swi-prolog/boot/init.pl:682
  [84] must_det_ll1('','') at /home/runner/work/metta-wam/metta-wam/src/canary/metta_utils.pl:304
  [83] catch(user:must_det_ll1(once,user:track_load_into_file0(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),md_failed(once,_9120,_9122),user:(_9150 is _9156-1,_9162>0->throw(md_failed(once,_9174,_9176));ugtrace(md_failed(once,_9194,_9196),user:track_load_into_file0(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),throw('$aborted'))) at /usr/lib/swi-prolog/boot/init.pl:565
  [81] md(once,'') at /home/runner/work/metta-wam/metta-wam/src/canary/metta_utils.pl:294
  [79] track_load_into_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','') at /home/runner/work/metta-wam/metta-wam/library/genome/flybase_loader.pl:1007
  [78] once('') at /usr/lib/swi-prolog/boot/init.pl:538
  [77] call('','') at /usr/lib/swi-prolog/boot/init.pl:504
  [76] catch(user:call(user:once,user:track_load_into_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),_9346,user:(fbug(_9404=user:call(user:once,user:track_load_into_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))),ugtrace(error(_9452),user:call(user:once,user:track_load_into_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))))) at /usr/lib/swi-prolog/boot/init.pl:565
  [73] ''('') 
  [72] setup_call_cleanup(user:nop(trace(user:track_load_into_file/2,+fail)),user:(must_not_error(call(user:once,user:track_load_into_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))))*->true;md_failed(user:once,user:track_load_into_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))),user:nop(trace(user:track_load_into_file/2,-fail))) at /usr/lib/swi-prolog/boot/init.pl:682
  [71] must_det_ll1('','') at /home/runner/work/metta-wam/metta-wam/src/canary/metta_utils.pl:304
  [70] catch(user:must_det_ll1(once,user:track_load_into_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),md_failed(once,_9786,_9788),user:(_9816 is _9822-1,_9828>0->throw(md_failed(once,_9840,_9842));ugtrace(md_failed(once,_9860,_9862),user:track_load_into_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),throw('$aborted'))) at /usr/lib/swi-prolog/boot/init.pl:565
  [68] md(once,'') at /home/runner/work/metta-wam/metta-wam/src/canary/metta_utils.pl:294
  [66] locally_each:wtl_how('','','','','') at /home/runner/work/metta-wam/metta-wam/src/packs/logicmoo_utils/prolog/logicmoo/redo_locally.pl:217
  [62] call('') at /usr/lib/swi-prolog/boot/init.pl:502
  [61] setup_call_cleanup(user:nb_setval('$circular_goals',P;HTML| [ load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')]),user:call(load_metta1('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),user:(nb_current('$circular_goals',_10058),select(load_metta1('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'),_10070,_10072),nb_setval('$circular_goals',_10084))) at /usr/lib/swi-prolog/boot/init.pl:682
  [56] catch(user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'),_10110,user:(always_rethrow(_10146)->throw(_10150);pp_m('red',user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')in _10162))) at /usr/lib/swi-prolog/boot/init.pl:565
  [53] once('') at /usr/lib/swi-prolog/boot/init.pl:538
  [52] call('','') at /usr/lib/swi-prolog/boot/init.pl:504
  [51] catch(user:call(user:once,user:catch_red(user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),_10250,user:(fbug(_10312=user:call(user:once,user:catch_red(user:...))),ugtrace(error(_10358),user:call(user:once,user:catch_red(user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))))) at /usr/lib/swi-prolog/boot/init.pl:565
  [48] ''('') 
  [47] setup_call_cleanup(user:nop(trace(user:catch_red/1,+fail)),user:(must_not_error(call(user:once,user:catch_red(user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))))*->true;md_failed(user:once,user:catch_red(user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))),user:nop(trace(user:catch_red/1,-fail))) at /usr/lib/swi-prolog/boot/init.pl:682
  [46] must_det_ll1('','') at /home/runner/work/metta-wam/metta-wam/src/canary/metta_utils.pl:304
  [45] catch(user:must_det_ll1(once,user:catch_red(user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),md_failed(once,_10708,_10710),user:(_10738 is _10744-1,_10750>0->throw(md_failed(once,_10762,_10764));ugtrace(md_failed(once,_10782,_10784),user:catch_red(user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),throw('$aborted'))) at /usr/lib/swi-prolog/boot/init.pl:565
  [43] md(once,'') at /home/runner/work/metta-wam/metta-wam/src/canary/metta_utils.pl:294
  [41] ''('') 
  [40] catch(user:(must_det_ll(not_compatio((nl,write('; '),write_src(user:...),nl))),must_det_ll(catch_red(user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),!,must_det_ll(flush_output)),'$aborted',user:fbug(aborted(user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'),(must_det_ll(not_compatio((nl,write('; '),...,nl))),must_det_ll(catch_red(user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),!,must_det_ll(flush_output))))) at /usr/lib/swi-prolog/boot/init.pl:565
  [37] cmdline_load_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta') at /home/runner/work/metta-wam/metta-wam/src/canary/metta_interp.pl:732
  [35] ignore('') at /usr/lib/swi-prolog/boot/init.pl:547
  [33] cmdline_load_metta(execute,'&self',P;HTML|[ 
                                            'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '--halt=true', '--stdin=tty', '--stdout=tty', 
                                            '--stderr=tty']) at /home/runner/work/metta-wam/metta-wam/src/canary/metta_interp.pl:702
  [26] do_cmdline_load_metta(execute,'&self','') at /home/runner/work/metta-wam/metta-wam/src/canary/metta_interp.pl:668
  [23] catch(user:run_cmd_args,_11248,user:(always_rethrow(_11278)->throw(_11282);pp_m('red',run_cmd_args in _11294))) at /usr/lib/swi-prolog/boot/init.pl:565
  [20] if_or_else('',true) at /home/runner/work/metta-wam/metta-wam/src/canary/metta_interp.pl:1486
  [18] apply:maplist_('',user:catch_red_ignore) at /usr/lib/swi-prolog/library/apply.pl:226
  [10] ignore('') at /usr/lib/swi-prolog/boot/init.pl:547
   [9] do_loon at /home/runner/work/metta-wam/metta-wam/src/canary/metta_interp.pl:1654
   [7] catch(user:loon(main),_11428,'$toplevel':true) at /usr/lib/swi-prolog/boot/init.pl:565
   [6] catch_with_backtrace('','','') at /usr/lib/swi-prolog/boot/init.pl:645

Note: some frames are missing due to last-call optimization.
Re-run your program in debug mode (:- debug.) to get more detail.
(0)$P;HTML|[system]P;HTML| system:'$c_call_prolog'. P;HTML| no(clause). 
(1)$P;HTML|[$toplevel]P;HTML| '$toplevel':'$initialise'.   %  toplevel.pl:556: 
(2)$P;HTML|[system]P;HTML| system:catch('$toplevel':initialise_prolog,A,'$toplevel':initialise_error(A)).   %  init.pl:564: 
(5)<*>$P;HTML|[$toplevel]P;HTML| '$toplevel':run_init_goal('',@(user:loon(main),'/home/runner/work/metta-wam/metta-wam/src/canary/metta_interp.pl':1851)).   %  toplevel.pl:740: 
(6)$P;HTML|[system]P;HTML| system:catch_with_backtrace('','','').   %  init.pl:644: 
(7)$P;HTML|[system]P;HTML| system:catch(user:loon(main),A,'$toplevel':true).   %  init.pl:564: 
(9)$P;HTML|[user]P;HTML| do_loon.   %  metta_interp.pl:1653: 
(10)<*>$P;HTML|[system]P;HTML| system:ignore('').   %  init.pl:546: 
(18)$P;HTML|[apply]P;HTML| apply:maplist_('',user:catch_red_ignore).   %  apply.pl:225: 
(20)<*>$P;HTML|[user]P;HTML| if_or_else('',true).   %  metta_interp.pl:1486: 
(23)$P;HTML|[system]P;HTML| system:catch(user:run_cmd_args,A,user:(always_rethrow(A)->throw(A);pp_m(red,run_cmd_args in A))).   %  init.pl:564: 
(26)$P;HTML|[user]P;HTML| do_cmdline_load_metta(execute,'&self','').   %  metta_interp.pl:665: 
(33)<*>$P;HTML|[user]P;HTML| cmdline_load_metta(execute,'&self',['tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','--halt=true','--stdin=tty','--stdout=tty','--stderr=tty']).   %  metta_interp.pl:701: 
(35)<*>$P;HTML|[system]P;HTML| system:ignore('').   %  init.pl:546: 
(37)$P;HTML|[user]P;HTML| cmdline_load_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta').   %  metta_interp.pl:732: 
(40)$P;HTML|[system]#P;HTML| system:catch(user:(not_compatio((nl,write('; '),write_src(user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),nl)),catch_red(user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),!,flush_output),'$aborted',user:fbug(aborted(user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'),(not_compatio((nl,write('; '),write_src(user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),nl)),catch_red(user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),!,flush_output)))).   %  init.pl:564: 
(41)$P;HTML|[user]P;HTML| system:''(''). P;HTML| no(clause). 
(43)$P;HTML|[user]P;HTML| md(once,'').   %  metta_utils.pl:293: 
(45)$P;HTML|[system]P;HTML| system:catch(user:must_det_ll1(once,user:catch_red(user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),md_failed(once,A,B),user:(C is B-1,C>0->throw(md_failed(once,A,C));ugtrace(md_failed(once,A,C),user:catch_red(user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),throw('$aborted'))).   %  init.pl:564: 
(46)$P;HTML|[user]P;HTML| must_det_ll1('','').   %  metta_utils.pl:302: 
(47)$P;HTML|[system]#P;HTML| system:setup_call_cleanup(user:nop(trace(user:catch_red/1,+fail)),user:(call(user:once,user:catch_red(user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))*->true;md_failed(user:once,user:catch_red(user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))),user:nop(trace(user:catch_red/1,-fail))).   %  init.pl:680: 
(48)<*>$P;HTML|[user]P;HTML| system:''(''). P;HTML| no(clause). 
(51)$P;HTML|[system]P;HTML| system:catch(user:call(user:once,user:catch_red(user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),A,user:(fbug(A=user:call(user:once,user:catch_red(user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))),ugtrace(error(A),user:call(user:once,user:catch_red(user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))))).   %  init.pl:564: 
(52)$P;HTML|[system]P;HTML| system:call('','').   %  init.pl:503: 
(53)$P;HTML|[system]P;HTML| system:once('').   %  init.pl:537: 
(56)$P;HTML|[system]P;HTML| system:catch(user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'),A,user:(always_rethrow(A)->throw(A);pp_m(red,user:load_metta_file('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')in A))).   %  init.pl:564: 
(61)$P;HTML|[system]P;HTML| system:setup_call_cleanup(user:nb_setval('$circular_goals',[load_metta1('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')]),user:call(load_metta1('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),user:(nb_current('$circular_goals',A),select(load_metta1('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'),A,B),nb_setval('$circular_goals',B))).   %  init.pl:680: 
(62)$P;HTML|[system]P;HTML| system:call('').   %  init.pl:501: 
(66)$P;HTML|[locally_each]P;HTML| locally_each:wtl_how('','','','','').   %  redo_locally.pl:217: 
(68)$P;HTML|[user]P;HTML| md(once,'').   %  metta_utils.pl:293: 
(70)$P;HTML|[system]P;HTML| system:catch(user:must_det_ll1(once,user:track_load_into_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),md_failed(once,A,B),user:(C is B-1,C>0->throw(md_failed(once,A,C));ugtrace(md_failed(once,A,C),user:track_load_into_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),throw('$aborted'))).   %  init.pl:564: 
(71)$P;HTML|[user]P;HTML| must_det_ll1('','').   %  metta_utils.pl:302: 
(72)$P;HTML|[system]#P;HTML| system:setup_call_cleanup(user:nop(trace(user:track_load_into_file/2,+fail)),user:(call(user:once,user:track_load_into_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))*->true;md_failed(user:once,user:track_load_into_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))),user:nop(trace(user:track_load_into_file/2,-fail))).   %  init.pl:680: 
(73)<*>$P;HTML|[user]P;HTML| system:''(''). P;HTML| no(clause). 
(76)$P;HTML|[system]P;HTML| system:catch(user:call(user:once,user:track_load_into_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),A,user:(fbug(A=user:call(user:once,user:track_load_into_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))),ugtrace(error(A),user:call(user:once,user:track_load_into_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))))).   %  init.pl:564: 
(77)$P;HTML|[system]P;HTML| system:call('','').   %  init.pl:503: 
(78)$P;HTML|[system]P;HTML| system:once('').   %  init.pl:537: 
(79)$P;HTML|[user]P;HTML| track_load_into_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','').   %  flybase_loader.pl:1005: 
(81)$P;HTML|[user]P;HTML| md(once,'').   %  metta_utils.pl:293: 
(83)$P;HTML|[system]P;HTML| system:catch(user:must_det_ll1(once,user:track_load_into_file0('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),md_failed(once,A,B),user:(C is B-1,C>0->throw(md_failed(once,A,C));ugtrace(md_failed(once,A,C),user:track_load_into_file0('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),throw('$aborted'))).   %  init.pl:564: 
(84)$P;HTML|[user]P;HTML| must_det_ll1('','').   %  metta_utils.pl:302: 
(85)$P;HTML|[system]#P;HTML| system:setup_call_cleanup(user:nop(trace(user:track_load_into_file0/2,+fail)),user:(call(user:once,user:track_load_into_file0('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))*->true;md_failed(user:once,user:track_load_into_file0('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))),user:nop(trace(user:track_load_into_file0/2,-fail))).   %  init.pl:680: 
(86)<*>$P;HTML|[user]P;HTML| system:''(''). P;HTML| no(clause). 
(89)$P;HTML|[system]P;HTML| system:catch(user:call(user:once,user:track_load_into_file0('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),A,user:(fbug(A=user:call(user:once,user:track_load_into_file0('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))),ugtrace(error(A),user:call(user:once,user:track_load_into_file0('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))))).   %  init.pl:564: 
(90)$P;HTML|[system]P;HTML| system:call('','').   %  init.pl:503: 
(91)$P;HTML|[system]P;HTML| system:once('').   %  init.pl:537: 
(92)$P;HTML|[user]P;HTML| track_load_into_file0('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','').   %  flybase_loader.pl:1010: 
(94)$P;HTML|[user]P;HTML| md(once,'').   %  metta_utils.pl:293: 
(96)$P;HTML|[system]#P;HTML| system:catch(user:must_det_ll1(once,user:with_option(loading_file,'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',time(include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))),md_failed(once,A,B),user:(C is B-1,C>0->throw(md_failed(once,A,C));ugtrace(md_failed(once,A,C),user:with_option(loading_file,'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',time(include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))),throw('$aborted'))).   %  init.pl:564: 
(97)$P;HTML|[user]P;HTML| must_det_ll1('','').   %  metta_utils.pl:302: 
(98)$P;HTML|[system]#P;HTML| system:setup_call_cleanup(user:nop(trace(user:with_option/3,+fail)),user:(call(user:once,user:with_option(loading_file,'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',time(include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))))*->true;md_failed(user:once,user:with_option(loading_file,'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',time(include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))))),user:nop(trace(user:with_option/3,-fail))).   %  init.pl:680: 
(99)<*>$P;HTML|[user]P;HTML| system:''(''). P;HTML| no(clause). 
(102)$P;HTML|[system]#P;HTML| system:catch(user:call(user:once,user:with_option(loading_file,'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',time(include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))),A,user:(fbug(A=user:call(user:once,user:with_option(loading_file,'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',time(include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))))),ugtrace(error(A),user:call(user:once,user:with_option(loading_file,'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',time(include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))))))).   %  init.pl:564: 
(103)$P;HTML|[system]P;HTML| system:call('','').   %  init.pl:503: 
(104)$P;HTML|[system]P;HTML| system:once('').   %  init.pl:537: 
(106)$P;HTML|[system]#P;HTML| system:setup_call_cleanup(user:set_option_value(loading_file,'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'),user:time(include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),user:set_option_value(loading_file,[])).   %  init.pl:680: 
(107)<*>$P;HTML|[prolog_statistics]P;HTML| prolog_statistics:time('').   %  statistics.pl:285: 
(108)$P;HTML|[system]#P;HTML| system:call_cleanup(prolog_statistics:catch(user:include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'),A,(report(time{cpu:4.007522529,inferences:24394390,wall:1727916635.714776},10),throw(A))),prolog_statistics:(B=true)).   %  init.pl:684: 
(109)$P;HTML|[system]#P;HTML| system:catch(user:include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'),A,prolog_statistics:(report(time{cpu:4.007522529,inferences:24394390,wall:1727916635.714776},10),throw(A))).   %  init.pl:564: 
(111)$P;HTML|[user]P;HTML| md(once,'').   %  metta_utils.pl:293: 
(113)$P;HTML|[system]P;HTML| system:catch(user:must_det_ll1(once,user:include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),md_failed(once,A,B),user:(C is B-1,C>0->throw(md_failed(once,A,C));ugtrace(md_failed(once,A,C),user:include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),throw('$aborted'))).   %  init.pl:564: 
(114)$P;HTML|[user]P;HTML| must_det_ll1('','').   %  metta_utils.pl:302: 
(115)$P;HTML|[system]#P;HTML| system:setup_call_cleanup(user:nop(trace(user:include_metta/2,+fail)),user:(call(user:once,user:include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))*->true;md_failed(user:once,user:include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),user:nop(trace(user:include_metta/2,-fail))).   %  init.pl:680: 
(116)<*>$P;HTML|[user]P;HTML| system:''(''). P;HTML| no(clause). 
(119)$P;HTML|[system]P;HTML| system:catch(user:call(user:once,user:include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),A,user:(fbug(A=user:call(user:once,user:include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),ugtrace(error(A),user:call(user:once,user:include_metta('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))))).   %  init.pl:564: 
(120)$P;HTML|[system]P;HTML| system:call('','').   %  init.pl:503: 
(121)$P;HTML|[system]P;HTML| system:once('').   %  init.pl:537: 
(125)$P;HTML|[system]P;HTML| system:setup_call_cleanup(user:nb_setval('$circular_goals',[include_metta1('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'),load_metta1('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')]),user:call(include_metta1('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),user:(nb_current('$circular_goals',A),select(include_metta1('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'),A,B),nb_setval('$circular_goals',B))).   %  init.pl:680: 
(126)$P;HTML|[system]P;HTML| system:call('').   %  init.pl:501: 
(127)$P;HTML|[user]P;HTML| include_metta1('&self','tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta').   %  metta_loader.pl:396: 
(129)$P;HTML|[user]P;HTML| md(once,'').   %  metta_utils.pl:293: 
(131)$P;HTML|[system]P;HTML| system:catch(user:must_det_ll1(once,user:include_metta_directory_file('&self','/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta','/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),md_failed(once,A,B),user:(C is B-1,C>0->throw(md_failed(once,A,C));ugtrace(md_failed(once,A,C),user:include_metta_directory_file('&self','/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta','/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),throw('$aborted'))).   %  init.pl:564: 
(132)$P;HTML|[user]P;HTML| must_det_ll1('','').   %  metta_utils.pl:302: 
(133)$P;HTML|[system]#P;HTML| system:setup_call_cleanup(user:nop(trace(user:include_metta_directory_file/3,+fail)),user:(call(user:once,user:include_metta_directory_file('&self','/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta','/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))*->true;md_failed(user:once,user:include_metta_directory_file('&self','/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta','/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),user:nop(trace(user:include_metta_directory_file/3,-fail))).   %  init.pl:680: 
(134)<*>$P;HTML|[user]P;HTML| system:''(''). P;HTML| no(clause). 
(137)$P;HTML|[system]P;HTML| system:catch(user:call(user:once,user:include_metta_directory_file('&self','/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta','/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')),A,user:(fbug(A=user:call(user:once,user:include_metta_directory_file('&self','/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta','/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))),ugtrace(error(A),user:call(user:once,user:include_metta_directory_file('&self','/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta','/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))))).   %  init.pl:564: 
(138)$P;HTML|[system]P;HTML| system:call('','').   %  init.pl:503: 
(139)$P;HTML|[system]P;HTML| system:once('').   %  init.pl:537: 
(142)$P;HTML|[system]#P;HTML| system:setup_call_cleanup(user:working_directory('/home/runner/work/metta-wam/metta-wam/','/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'),user:setup_call_cleanup(open('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',read,(0x55aefe344370),[encoding(utf8)]),load_metta_file_stream('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370)),close((0x55aefe344370))),user:working_directory(A,'/home/runner/work/metta-wam/metta-wam/')).   %  init.pl:680: 
(144)$P;HTML|[user]P;HTML| md(once,'').   %  metta_utils.pl:293: 
(146)$P;HTML|[system]#P;HTML| system:catch(user:must_det_ll1(once,user:setup_call_cleanup(open('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',read,(0x55aefe344370),[encoding(utf8)]),load_metta_file_stream('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370)),close((0x55aefe344370)))),md_failed(once,A,B),user:(C is B-1,C>0->throw(md_failed(once,A,C));ugtrace(md_failed(once,A,C),user:setup_call_cleanup(open('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',read,(0x55aefe344370),[encoding(utf8)]),load_metta_file_stream('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370)),close((0x55aefe344370)))),throw('$aborted'))).   %  init.pl:564: 
(147)$P;HTML|[user]P;HTML| must_det_ll1('','').   %  metta_utils.pl:302: 
(148)$P;HTML|[system]#P;HTML| system:setup_call_cleanup(user:nop(trace(user:scc/3,+fail)),user:(call(user:once,user:setup_call_cleanup(open('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',read,(0x55aefe344370),[encoding(utf8)]),load_metta_file_stream('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370)),close((0x55aefe344370))))*->true;md_failed(user:once,user:setup_call_cleanup(open('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',read,(0x55aefe344370),[encoding(utf8)]),load_metta_file_stream('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370)),close((0x55aefe344370))))),user:nop(trace(user:scc/3,-fail))).   %  init.pl:680: 
(149)<*>$P;HTML|[user]P;HTML| system:''(''). P;HTML| no(clause). 
(152)$P;HTML|[system]#P;HTML| system:catch(user:call(user:once,user:setup_call_cleanup(open('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',read,(0x55aefe344370),[encoding(utf8)]),load_metta_file_stream('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370)),close((0x55aefe344370)))),A,user:(fbug(A=user:call(user:once,user:setup_call_cleanup(open('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',read,(0x55aefe344370),[encoding(utf8)]),load_metta_file_stream('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370)),close((0x55aefe344370))))),ugtrace(error(A),user:call(user:once,user:setup_call_cleanup(open('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',read,(0x55aefe344370),[encoding(utf8)]),load_metta_file_stream('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370)),close((0x55aefe344370))))))).   %  init.pl:564: 
(153)$P;HTML|[system]P;HTML| system:call('','').   %  init.pl:503: 
(154)$P;HTML|[system]P;HTML| system:once('').   %  init.pl:537: 
(155)$P;HTML|[system]#P;HTML| system:setup_call_cleanup(user:open('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',read,(0x55aefe344370),[encoding(utf8)]),user:load_metta_file_stream('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370)),user:close((0x55aefe344370))).   %  init.pl:680: 
(157)$P;HTML|[user]P;HTML| md(once,'').   %  metta_utils.pl:293: 
(159)$P;HTML|[system]P;HTML| system:catch(user:must_det_ll1(once,user:load_metta_file_stream('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370))),md_failed(once,A,B),user:(C is B-1,C>0->throw(md_failed(once,A,C));ugtrace(md_failed(once,A,C),user:load_metta_file_stream('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370))),throw('$aborted'))).   %  init.pl:564: 
(160)$P;HTML|[user]P;HTML| must_det_ll1('','').   %  metta_utils.pl:302: 
(161)$P;HTML|[system]#P;HTML| system:setup_call_cleanup(user:nop(trace(user:load_metta_file_stream/3,+fail)),user:(call(user:once,user:load_metta_file_stream('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370)))*->true;md_failed(user:once,user:load_metta_file_stream('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370)))),user:nop(trace(user:load_metta_file_stream/3,-fail))).   %  init.pl:680: 
(162)<*>$P;HTML|[user]P;HTML| system:''(''). P;HTML| no(clause). 
(165)$P;HTML|[system]P;HTML| system:catch(user:call(user:once,user:load_metta_file_stream('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370))),A,user:(fbug(A=user:call(user:once,user:load_metta_file_stream('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370)))),ugtrace(error(A),user:call(user:once,user:load_metta_file_stream('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370)))))).   %  init.pl:564: 
(166)$P;HTML|[system]P;HTML| system:call('','').   %  init.pl:503: 
(167)$P;HTML|[system]P;HTML| system:once('').   %  init.pl:537: 
(170)$P;HTML|[system]#P;HTML| system:setup_call_cleanup(user:set_option_value(loading_file,'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'),user:((set_exec_num('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',1),load_answer_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'),set_exec_num('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta',0)),load_metta_file_stream_fast(64329,read_metta2,'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370))),user:set_option_value(loading_file,'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')).   %  init.pl:680: 
(173)$P;HTML|[user]P;HTML| md(once,'').   %  metta_utils.pl:293: 
(175)$P;HTML|[system]P;HTML| system:catch(user:must_det_ll1(once,user:load_metta_file_stream_fast(64329,read_metta2,'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370))),md_failed(once,A,B),user:(C is B-1,C>0->throw(md_failed(once,A,C));ugtrace(md_failed(once,A,C),user:load_metta_file_stream_fast(64329,read_metta2,'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370))),throw('$aborted'))).   %  init.pl:564: 
(176)$P;HTML|[user]P;HTML| must_det_ll1('','').   %  metta_utils.pl:302: 
(177)$P;HTML|[system]#P;HTML| system:setup_call_cleanup(user:nop(trace(user:load_metta_file_stream_fast/5,+fail)),user:(call(user:once,user:load_metta_file_stream_fast(64329,read_metta2,'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370)))*->true;md_failed(user:once,user:load_metta_file_stream_fast(64329,read_metta2,'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370)))),user:nop(trace(user:load_metta_file_stream_fast/5,-fail))).   %  init.pl:680: 
(178)<*>$P;HTML|[user]P;HTML| system:''(''). P;HTML| no(clause). 
(181)$P;HTML|[system]P;HTML| system:catch('','','').   %  init.pl:564: 
(183)$P;HTML|[user]P;HTML| ugtrace(error(error(stream_error(1805:0:64295,syntax_error(unexpected_end_of_file,"Unexpected end of file in list")))),user:call(user:once,user:load_metta_file_stream_fast(64329,read_metta2,'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta','&self',(0x55aefe344370)))).   %  metta_utils.pl:376: 
(185)<*>$P;HTML|[system]P;HTML| system:ignore(user:catch(bt,A,true)).   %  init.pl:546: 
(186)$P;HTML|[system]P;HTML| system:catch(user:bt,A,user:true).   %  init.pl:564: 
(190)$P;HTML|[user]P;HTML| bugger:dumpST_now(2035,[max_depth(5000),numbervars(true),show([level,has_alternatives,hidden,context_module,goal,clause])]).   %  dumpst.pl:261: 


  (error  
    (stream_error  
      (:  1805 
        (:  0 64295)) 
      (syntax_error  unexpected_end_of_file "Unexpected end of file in list")))




  (error  
    (stream_error  
      (:  1805 
        (:  0 64295)) 
      (syntax_error  unexpected_end_of_file "Unexpected end of file in list")))


^  Exit: (187) [system] sig_atomic(rtrace:restart_rtrace)
^  Call: (188) [user] call(user:once, user:load_metta_file_stream_fast(64329, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '&self', (0x55aefe344370)))
^  Unify: (188) [system] call(user:once, user:load_metta_file_stream_fast(64329, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '&self', (0x55aefe344370)))
^  Call: (189) [user] once(user:load_metta_file_stream_fast(64329, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '&self', (0x55aefe344370)))
^  Unify: (189) [system] once(user:load_metta_file_stream_fast(64329, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '&self', (0x55aefe344370)))
^  Call: (190) [user] load_metta_file_stream_fast(64329, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '&self', (0x55aefe344370))
^  Unify: (190) [user] load_metta_file_stream_fast(64329, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '&self', (0x55aefe344370))
   Call: (191) [system] fail
^  Redo: (190) [user] load_metta_file_stream_fast(64329, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '&self', (0x55aefe344370))
^  Unify: (190) [user] load_metta_file_stream_fast(64329, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '&self', (0x55aefe344370))
^  Call: (191) [user] symbol_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '.buffer~', _229394)
^  Unify: (191) [user] symbol_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '.buffer~', _229394)
   Call: (192) [system] atom_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '.buffer~', _229394)
   Exit: (192) [system] atom_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '.buffer~', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.buffer~')
^  Exit: (191) [user] symbol_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '.buffer~', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.buffer~')
   Call: (191) [system] exists_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.buffer~')
^  Redo: (190) [user] load_metta_file_stream_fast(64329, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '&self', (0x55aefe344370))
^  Unify: (190) [user] load_metta_file_stream_fast(64329, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '&self', (0x55aefe344370))
^  Call: (191) [user] if_t(use_fast_buffer, (symbol_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '.buffer~', _264186), fbugio(creating(_264186)), write_bf(_264186, (:-dynamic metta_file_buffer/5)), write_bf(_264186, (:-multifile metta_file_buffer/5))))
^  Unify: (191) [user] if_t(use_fast_buffer, (symbol_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '.buffer~', _264186), fbugio(creating(_264186)), write_bf(_264186, (:-dynamic metta_file_buffer/5)), write_bf(_264186, (:-multifile metta_file_buffer/5))))
^  Call: (192) [user] use_fast_buffer
^  Unify: (192) [user] use_fast_buffer
   Call: (193) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (192) [user] use_fast_buffer
^  Redo: (191) [user] if_t(use_fast_buffer, (symbol_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '.buffer~', _264186), fbugio(creating(_264186)), write_bf(_264186, (:-dynamic metta_file_buffer/5)), write_bf(_264186, (:-multifile metta_file_buffer/5))))
^  Exit: (191) [user] if_t(use_fast_buffer, (symbol_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '.buffer~', _264186), fbugio(creating(_264186)), write_bf(_264186, (:-dynamic metta_file_buffer/5)), write_bf(_264186, (:-multifile metta_file_buffer/5))))
   Call: (191) [system] repeat
   Exit: (191) [system] repeat
^  Call: (191) [user] my_line_count((0x55aefe344370), _289076)
^  Unify: (191) [user] my_line_count((0x55aefe344370), seek($, 0, current, _290014))
   Call: (192) [system] stream_property((0x55aefe344370), reposition(true))
   Unify: (192) [system] stream_property((0x55aefe344370), reposition(true))
   Call: (193) [system] nonvar((0x55aefe344370))
   Exit: (193) [system] nonvar((0x55aefe344370))
   Call: (193) [system] nonvar(reposition(true))
   Exit: (193) [system] nonvar(reposition(true))
   Exit: (192) [system] stream_property((0x55aefe344370), reposition(true))
   Call: (192) [system] seek((0x55aefe344370), 0, current, _290014)
   Exit: (192) [system] seek((0x55aefe344370), 0, current, 64329)
   Call: (192) [system] fail
^  Redo: (191) [user] my_line_count((0x55aefe344370), _289076)
^  Unify: (191) [user] my_line_count((0x55aefe344370), _289076)
   Call: (192) [system] stream_property((0x55aefe344370), position(_289076))
   Unify: (192) [system] stream_property((0x55aefe344370), position(_289076))
   Call: (193) [system] nonvar((0x55aefe344370))
   Exit: (193) [system] nonvar((0x55aefe344370))
   Call: (193) [system] nonvar(position(_289076))
   Exit: (193) [system] nonvar(position(_289076))
   Exit: (192) [system] stream_property((0x55aefe344370), position('$stream_position'(64329, 1805, 0, 64329)))
^  Exit: (191) [user] my_line_count((0x55aefe344370), '$stream_position'(64329, 1805, 0, 64329))
   Call: (191) [user] current_read_mode(file, _309494)
   Unify: (191) [user] current_read_mode(file, _309494)
   Call: (192) [system] nb_current(file_mode, _309494)
   Redo: (191) [user] current_read_mode(file, _309494)
   Call: (192) [system] _309494=(+)
   Exit: (192) [system] (+)=(+)
   Exit: (191) [user] current_read_mode(file, +)
^  Call: (191) [user] read_metta2((0x55aefe344370), _315944)
^  Unify: (191) [user] read_metta2((0x55aefe344370), _315944)
^  Call: (192) [user] clause(t_l:s_reader_info(_315944), _317890, _317812)
^  Redo: (191) [user] read_metta2((0x55aefe344370), _315944)
^  Unify: (191) [user] read_metta2((0x55aefe344370), _315944)
^  Call: (192) [user] use_new_parse_sexpr_metta_IO((0x55aefe344370))
^  Unify: (192) [user] use_new_parse_sexpr_metta_IO((0x55aefe344370))
   Call: (193) [system] string((0x55aefe344370))
^  Redo: (192) [user] use_new_parse_sexpr_metta_IO((0x55aefe344370))
^  Exit: (192) [user] use_new_parse_sexpr_metta_IO((0x55aefe344370))
^  Call: (192) [user] new_parse_sexpr_metta_IO((0x55aefe344370), _315944)
^  Unify: (192) [user] new_parse_sexpr_metta_IO((0x55aefe344370), _315944)
^  Call: (193) [user] new_parse_sexpr_metta_IO1((0x55aefe344370), _315944)
^  Unify: (193) [user] new_parse_sexpr_metta_IO1((0x55aefe344370), _315944)
   Call: (194) [system] at_end_of_stream((0x55aefe344370))
   Exit: (194) [system] at_end_of_stream((0x55aefe344370))
   Call: (194) [system] _315944=end_of_file
   Exit: (194) [system] end_of_file=end_of_file
^  Exit: (193) [user] new_parse_sexpr_metta_IO1((0x55aefe344370), end_of_file)
   Call: (193) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe344370), end_of_file)))
   Unify: (193) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe344370), end_of_file)))
   Exit: (193) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe344370), end_of_file)))
^  Exit: (192) [user] new_parse_sexpr_metta_IO((0x55aefe344370), end_of_file)
^  Exit: (191) [user] read_metta2((0x55aefe344370), end_of_file)
^  Call: (191) [user] subst_vars(end_of_file, _338174, [], _338176)
^  Unify: (191) [user] subst_vars(end_of_file, end_of_file, [], [])
   Call: (192) [system] var(end_of_file)
^  Redo: (191) [user] subst_vars(end_of_file, _338174, [], _338176)
^  Unify: (191) [user] subst_vars(end_of_file, _338174, [], _338176)
   Call: (192) [system] atom(end_of_file)
   Exit: (192) [system] atom(end_of_file)
^  Call: (192) [user] symbol_concat($, _344694, end_of_file)
^  Unify: (192) [user] symbol_concat($, _344694, end_of_file)
   Call: (193) [system] atom_concat($, _344694, end_of_file)
   Fail: (193) [system] atom_concat($, _344694, end_of_file)
^  Fail: (192) [user] symbol_concat($, _344694, end_of_file)
^  Redo: (191) [user] subst_vars(end_of_file, _338174, [], _338176)
^  Unify: (191) [user] subst_vars(end_of_file, _338174, [], _338176)
   Call: (192) [system] compound(end_of_file)
^  Redo: (191) [user] subst_vars(end_of_file, _338174, [], _338176)
^  Unify: (191) [user] subst_vars(end_of_file, end_of_file, [], [])
^  Exit: (191) [user] subst_vars(end_of_file, end_of_file, [], [])
   Call: (191) [system] _354960=metta_file_buffer(+, end_of_file, [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '$stream_position'(64329, 1805, 0, 64329))
   Exit: (191) [system] metta_file_buffer(+, end_of_file, [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '$stream_position'(64329, 1805, 0, 64329))=metta_file_buffer(+, end_of_file, [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '$stream_position'(64329, 1805, 0, 64329))
^  Call: (191) [user] assertz(metta_file_buffer(+, end_of_file, [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '$stream_position'(64329, 1805, 0, 64329)))
^  Exit: (191) [user] assertz(metta_file_buffer(+, end_of_file, [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '$stream_position'(64329, 1805, 0, 64329)))
^  Call: (191) [user] if_t(use_fast_buffer, write_bf(_264186, metta_file_buffer(+, end_of_file, [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '$stream_position'(64329, 1805, 0, 64329))))
^  Unify: (191) [user] if_t(use_fast_buffer, write_bf(_264186, metta_file_buffer(+, end_of_file, [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '$stream_position'(64329, 1805, 0, 64329))))
^  Call: (192) [user] use_fast_buffer
^  Unify: (192) [user] use_fast_buffer
   Call: (193) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (192) [user] use_fast_buffer
^  Redo: (191) [user] if_t(use_fast_buffer, write_bf(_264186, metta_file_buffer(+, end_of_file, [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '$stream_position'(64329, 1805, 0, 64329))))
^  Exit: (191) [user] if_t(use_fast_buffer, write_bf(_264186, metta_file_buffer(+, end_of_file, [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '$stream_position'(64329, 1805, 0, 64329))))
   Call: (191) [system] flush_output
   Exit: (191) [system] flush_output
   Call: (191) [system] at_end_of_stream((0x55aefe344370))
   Exit: (191) [system] at_end_of_stream((0x55aefe344370))
^  Call: (191) [user] load_metta_buffer('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
^  Unify: (191) [user] load_metta_buffer('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
^  Call: (192) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1)
^  Unify: (192) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1)
   Call: (193) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _424202)
   Unify: (193) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _424202)
   Call: (194) [system] atomic(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
   Exit: (194) [system] atomic(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
   Exit: (193) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
^  Call: (193) [user] retract(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _452252))
^  Exit: (193) [user] retract(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 0))
^  Call: (193) [user] asserta(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1))
^  Exit: (193) [user] asserta(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1))
^  Exit: (192) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1)
^  Call: (192) [user] load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
^  Unify: (192) [user] load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
   Call: (193) [system] atom(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
   Exit: (193) [system] atom(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
   Call: (193) [system] is_absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
   Exit: (193) [system] is_absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
   Call: (193) [system] exists_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
   Exit: (193) [system] exists_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
^  Unify: (192) [user] load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
^  Call: (193) [user] load_answer_file_now(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
^  Unify: (193) [user] load_answer_file_now(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
^  Call: (194) [user] ignore((ensure_extension(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', answers, _9260), remove_specific_extension(_9260, answers, _9274), set_exec_num(_9274, 1), fbug(load_answer_file(_9260, _9274)), load_answer_file(_9260, _9274)))
^  Unify: (194) [system] ignore(user:(ensure_extension(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', answers, _9260), remove_specific_extension(_9260, answers, _9274), set_exec_num(_9274, 1), fbug(load_answer_file(_9260, _9274)), load_answer_file(_9260, _9274)))
^  Call: (196) [user] ensure_extension(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', answers, _9260)
^  Unify: (196) [user] ensure_extension(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', answers, _9260)
   Call: (197) [system] file_name_extension(_28724, _28648, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
   Exit: (197) [system] file_name_extension('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test', metta, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
   Call: (197) [system] metta=answers
   Fail: (197) [system] metta=answers
^  Redo: (196) [user] ensure_extension(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', answers, _9260)
   Call: (197) [system] atom_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '.', _45008)
   Exit: (197) [system] atom_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '.', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.')
   Call: (197) [system] atom_concat('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.', answers, _9260)
   Exit: (197) [system] atom_concat('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.', answers, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers')
^  Exit: (196) [user] ensure_extension(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', answers, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers')
^  Call: (196) [user] remove_specific_extension(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers', answers, _9274)
^  Unify: (196) [user] remove_specific_extension(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers', answers, _9274)
   Call: (197) [system] file_name_extension(_9274, _78864, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers')
   Exit: (197) [system] file_name_extension(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', answers, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers')
   Call: (197) [system] answers=answers
   Exit: (197) [system] answers=answers
^  Exit: (196) [user] remove_specific_extension(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers', answers, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
^  Call: (196) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1)
^  Unify: (196) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1)
   Call: (197) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _112700)
   Unify: (197) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _112700)
   Call: (198) [system] atomic(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
   Exit: (198) [system] atomic(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
   Exit: (197) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
^  Call: (197) [user] retract(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _140750))
^  Exit: (197) [user] retract(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1))
^  Call: (197) [user] asserta(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1))
^  Exit: (197) [user] asserta(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1))
^  Exit: (196) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1)
   Call: (196) [user] fbug(load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
   Unify: (196) [user] fbug(load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Call: (197) [user] is_compatio
^  Unify: (197) [user] is_compatio
^  Call: (199) [system] setup_call_cleanup('$notrace'(_184196, _184198), once(user:is_compatio0), '$restore_trace'(_184196, _184198))
^  Unify: (199) [system] setup_call_cleanup(system:'$notrace'(_184196, _184198), system:once(user:is_compatio0), system:'$restore_trace'(_184196, _184198))
^  Call: (200) [system] sig_atomic(system:'$notrace'(_184196, _184198))
   Redo: (196) [user] fbug(load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
   Unify: (196) [user] fbug(load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Call: (197) [user] real_notrace(in_cmt(color_g_mesg('#2f2f2f', write_src(load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))))
^  Unify: (197) [user] real_notrace(user:in_cmt(color_g_mesg('#2f2f2f', write_src(load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))))
^  Call: (198) [user] setup_call_cleanup('$notrace'(_221960, _221962), once(user:in_cmt(color_g_mesg('#2f2f2f', write_src(load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))))), '$restore_trace'(_221960, _221962))
^  Unify: (198) [system] setup_call_cleanup(user:'$notrace'(_221960, _221962), user:once(user:in_cmt(color_g_mesg('#2f2f2f', write_src(load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))))), user:'$restore_trace'(_221960, _221962))
^  Call: (199) [system] sig_atomic(user:'$notrace'(_221960, _221962))
P;HTML|
;                                           (load_answer_file  /home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers /home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta)

^  Exit: (198) [system] setup_call_cleanup(user:'$notrace'(3, -1), user:once(user:in_cmt(color_g_mesg('#2f2f2f', write_src(load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))))), user:'$restore_trace'(3, -1))
^  Exit: (197) [user] real_notrace(user:in_cmt(color_g_mesg('#2f2f2f', write_src(load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))))
   Exit: (196) [user] fbug(load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Call: (196) [user] load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
^  Unify: (196) [user] load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
^  Call: (197) [user] file_answers(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _324386, _324388)
^  Unify: (197) [user] file_answers(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1, [['include!', '&corelib', stdlib_minimal]])
^  Exit: (197) [user] file_answers(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1, [['include!', '&corelib', stdlib_minimal]])
^  Call: (197) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1)
^  Unify: (197) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1)
   Call: (198) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _348496)
   Unify: (198) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _348496)
   Call: (199) [system] atomic(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
   Exit: (199) [system] atomic(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
   Exit: (198) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
^  Call: (198) [user] retract(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _376546))
^  Exit: (198) [user] retract(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1))
^  Call: (198) [user] asserta(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1))
^  Exit: (198) [user] asserta(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1))
^  Exit: (197) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1)
^  Exit: (196) [user] load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
^  Exit: (194) [system] ignore(user:(ensure_extension(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', answers, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers'), remove_specific_extension(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers', answers, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1), fbug(load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))
^  Exit: (193) [user] load_answer_file_now(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
^  Exit: (192) [user] load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
^  Call: (192) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 0)
^  Unify: (192) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 0)
   Call: (193) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _464824)
   Unify: (193) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _464824)
   Call: (194) [system] atomic(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
   Exit: (194) [system] atomic(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
   Exit: (193) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
^  Call: (193) [user] retract(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _492874))
^  Exit: (193) [user] retract(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1))
^  Call: (193) [user] asserta(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 0))
^  Exit: (193) [user] asserta(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 0))
^  Exit: (192) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 0)
^  Call: (192) [user] pfcAdd_Now(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Unify: (192) [user] pfcAdd_Now(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Call: (193) [user] current_predicate(pfcAdd/1)
^  Exit: (193) [user] current_predicate(pfcAdd/1)
^  Call: (193) [user] once_writeq_nl(pfcAdd(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))
^  Unify: (193) [user] once_writeq_nl(pfcAdd(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))
^  Call: (194) [user] clause(pfcTraceExecution, true)
^  Fail: (194) [user] clause(pfcTraceExecution, true)
^  Redo: (193) [user] once_writeq_nl(pfcAdd(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))
^  Exit: (193) [user] once_writeq_nl(pfcAdd(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')))
^  Call: (193) [user] pfcAdd(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Unify: (193) [user] pfcAdd(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Call: (194) [user] must_ex(current_why_UU(_39212))
^  Unify: (194) [user] must_ex(current_why_UU(_39212))
   Call: (196) [user] current_why_UU(_39212)
   Unify: (196) [user] current_why_UU(_39212)
^  Call: (197) [user] get_why_uu(_39212)
^  Unify: (197) [user] get_why_uu(_39212)
^  Call: (198) [user] findall(_44752, current_why(_44752), _44758)
^  Unify: (198) [$bags] findall(_44752, user:current_why(_44752), _44758)
^  Call: (199) [$bags] findall(_44752, user:current_why(_44752), _44758, [])
^  Unify: (199) [$bags] findall(_44752, user:current_why(_44752), _44758, [])
^  Call: (200) [$bags] cleanup_bag(findall_loop(_44752, user:current_why(_44752), _44758, []), '$destroy_findall_bag')
^  Unify: (200) [$bags] cleanup_bag('$bags':findall_loop(_44752, user:current_why(_44752), _44758, []), '$bags':'$destroy_findall_bag')
   Call: (201) [$bags] findall_loop(_44752, user:current_why(_44752), _44758, [])
   Unify: (201) [$bags] findall_loop(_44752, user:current_why(_44752), _44758, [])
^  Call: (202) [user] bugger:current_why(_44752)
^  Unify: (202) [user] bugger:current_why(_44752)
^  Call: (203) [user] bugger:current_why_data(_44752)
^  Unify: (203) [user] bugger:current_why_data(_44752)
   Call: (204) [system] nb_current('$current_why', wp(_44752, _56012))
   Fail: (204) [system] nb_current('$current_why', wp(_44752, _56012))
^  Redo: (203) [user] bugger:current_why_data(_44752)
^  Unify: (203) [user] bugger:current_why_data(_44752)
   Call: (204) [t_l] t_l:current_why_source(_44752)
   Fail: (204) [t_l] t_l:current_why_source(_44752)
^  Fail: (203) [user] bugger:current_why_data(_44752)
^  Redo: (202) [user] bugger:current_why(_44752)
^  Unify: (202) [user] bugger:current_why(mfl4(_63440, _63442, _63444, _63446))
^  Call: (204) [system] setup_call_cleanup('$notrace'(_64396, _64398), once(user:current_mfl4(_63440, _63442, _63444, _63446)), '$restore_trace'(_64396, _64398))
^  Unify: (204) [system] setup_call_cleanup(system:'$notrace'(_64396, _64398), system:once(user:current_mfl4(_63440, _63442, _63444, _63446)), system:'$restore_trace'(_64396, _64398))
^  Call: (205) [system] sig_atomic(system:'$notrace'(_64396, _64398))
^  Exit: (204) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:current_mfl4(_63440, user, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1805)), system:'$restore_trace'(3, -1))
^  Exit: (202) [user] bugger:current_why(P;HTML|mfl4(_63440, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Redo: (201) [$bags] findall_loop(_44752, user:current_why(_44752), _44758, [])
   Exit: (201) [$bags] findall_loop(_44752, user:current_why(_44752), [P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], [])
^  Exit: (200) [$bags] cleanup_bag('$bags':findall_loop(_44752, user:current_why(_44752), [P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], []), '$bags':'$destroy_findall_bag')
^  Exit: (199) [$bags] findall(_44752, user:current_why(_44752), [P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], [])
^  Exit: (198) [$bags] findall(_44752, user:current_why(_44752), [P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Call: (198) [system] [P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]\==[]
   Exit: (198) [system] [P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]\==[]
^  Call: (198) [user] u_to_uu([P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _39212)
^  Unify: (198) [user] u_to_uu([P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], ([P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], ax))
   Call: (199) [system] var([P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Fail: (199) [system] var([P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
^  Redo: (198) [user] u_to_uu([P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _39212)
^  Unify: (198) [user] u_to_uu([P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], [P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Call: (199) [system] nonvar([P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Exit: (199) [system] nonvar([P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Call: (199) [system] [P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]=(_201130, _201132)
   Fail: (199) [system] [P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]=(_201130, _201132)
^  Redo: (198) [user] u_to_uu([P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _39212)
^  Unify: (198) [user] u_to_uu([P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _39212)
^  Call: (199) [user] logicmoo_util_terms:list_to_conjuncts([P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _231556)
^  Unify: (199) [user] logicmoo_util_terms:list_to_conjuncts([P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _231556)
^  Call: (200) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _231556)
^  Unify: (200) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], [P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Call: (201) [system] var([P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Fail: (201) [system] var([P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
^  Redo: (200) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _231556)
^  Unify: (200) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], [P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
^  Call: (201) [user] not(compound([P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]))
^  Unify: (201) [system] not(user:compound([P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]))
   Call: (202) [system] compound([P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Exit: (202) [system] compound([P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
^  Fail: (201) [system] not(user:compound([P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]))
^  Redo: (200) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _231556)
^  Unify: (200) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _231556)
^  Call: (201) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _231556)
^  Unify: (201) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Call: (202) [system] var(P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Fail: (202) [system] var(P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Redo: (201) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _231556)
^  Unify: (201) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Call: (202) [user] not(compound(P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)))
^  Unify: (202) [system] not(user:compound(P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)))
   Call: (203) [system] compound(P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Exit: (203) [system] compound(P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Fail: (202) [system] not(user:compound(P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)))
^  Redo: (201) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _231556)
^  Unify: (201) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Exit: (201) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Exit: (200) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Exit: (199) [user] logicmoo_util_terms:list_to_conjuncts([P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Call: (199) [user] u_to_uu(P;HTML|mfl4(_81278, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _3326)
^  Unify: (199) [user] u_to_uu(P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
   Call: (200) [system] var(P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Fail: (200) [system] var(P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Redo: (199) [user] u_to_uu(P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _3326)
^  Unify: (199) [user] u_to_uu(P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Call: (200) [system] nonvar(P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Exit: (200) [system] nonvar(P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Call: (200) [system] P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)=(_75436, _75438)
   Fail: (200) [system] P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)=(_75436, _75438)
^  Redo: (199) [user] u_to_uu(P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _3326)
^  Unify: (199) [user] u_to_uu(P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (199) [user] u_to_uu(P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (198) [user] u_to_uu([P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (197) [user] get_why_uu((P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
   Exit: (196) [user] current_why_UU((P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (194) [user] must_ex(current_why_UU((P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Call: (194) [user] pfcAdd(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (194) [user] pfcAdd(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (195) [user] pfcPost(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (195) [user] pfcPost(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (196) [user] pfcPost_rev((P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax), user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Unify: (196) [user] pfcPost_rev((P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax), user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
   Call: (197) [system] is_list(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
   Fail: (197) [system] is_list(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Redo: (196) [user] pfcPost_rev((P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax), user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Call: (197) [user] pfcPost1(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (197) [user] pfcPost1(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (198) [user] control_arg_types(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), _277092)
^  Unify: (198) [user] control_arg_types(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), _277092)
   Call: (199) [system] fail
   Fail: (199) [system] fail
^  Fail: (198) [user] control_arg_types(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), _277092)
^  Redo: (197) [user] pfcPost1(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (197) [user] pfcPost1(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (198) [user] locally_each:locally(set_prolog_flag(occurs_check, true), catch(pfcPost11(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _316438, (notrace, wdmsg((user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')=>_316438)), trace)))
^  Unify: (198) [locally_each] locally_each:locally(user:set_prolog_flag(occurs_check, true), user:catch(pfcPost11(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _316438, (notrace, wdmsg((user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')=>_316438)), trace)))
^  Call: (199) [locally_each] locally_each:wtl(user, set_prolog_flag(occurs_check, true), user:catch(pfcPost11(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _316438, (notrace, wdmsg((user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')=>_316438)), trace)), user:each_call_cleanup)
^  Unify: (199) [locally_each] locally_each:wtl(user, set_prolog_flag(occurs_check, true), user:catch(pfcPost11(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _316438, (notrace, wdmsg((user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')=>_316438)), trace)), user:each_call_cleanup)
   Call: (200) [system] current_prolog_flag(occurs_check, _378176)
   Exit: (200) [system] current_prolog_flag(occurs_check, true)
^  Call: (200) [locally_each] locally_each:wtl_how(trusted_redo_call_cleanup, true==true, user:set_prolog_flag(occurs_check, true), user:catch(pfcPost11(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _316438, (notrace, wdmsg((user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')=>_316438)), trace)), user:set_prolog_flag(occurs_check, true))
^  Unify: (200) [locally_each] locally_each:wtl_how(locally_each:trusted_redo_call_cleanup, locally_each:(true==true), user:set_prolog_flag(occurs_check, true), user:catch(pfcPost11(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _316438, (notrace, wdmsg((user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')=>_316438)), trace)), user:set_prolog_flag(occurs_check, true))
   Call: (201) [system] true==true
   Exit: (201) [system] true==true
^  Call: (202) [user] pfcPost11(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (202) [user] pfcPost11(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (203) [user] must_ex(pfcAddSupport(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Unify: (203) [user] must_ex(pfcAddSupport(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Call: (205) [user] pfcAddSupport(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (205) [user] pfcAddSupport(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (206) [user] assert('$spft$'(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (206) [user] assert('$spft$'(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (205) [user] pfcAddSupport(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (203) [user] must_ex(pfcAddSupport(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3352, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Call: (203) [user] pfcUnique(post, user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Unify: (203) [user] pfcUnique(post, user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Call: (204) [user] pfcUnique(post, user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), true)
^  Unify: (204) [user] pfcUnique(post, user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), true)
^  Call: (205) [user] is_asserted_exact(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), true)
^  Unify: (205) [user] is_asserted_exact(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), true)
^  Call: (206) [user] strip_module(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), _37508, _37510)
^  Exit: (206) [user] strip_module(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), user, loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Call: (206) [user] is_asserted_exact(user, loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), true)
^  Unify: (206) [user] is_asserted_exact(user, loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), true)
   Call: (207) [system] _60762=user
   Exit: (207) [system] user=user
^  Call: (207) [user] clause(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), true, _62632)
^  Exit: (207) [user] clause(loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), true, (0x55aefe3061a0))
   Call: (207) [$syspreds] clause_property((0x55aefe3061a0), module(user))
   Unify: (207) [$syspreds] clause_property((0x55aefe3061a0), module(user))
   Exit: (207) [$syspreds] clause_property((0x55aefe3061a0), module(user))
^  Call: (207) [user] is_asserted_exact(user, loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), true, (0x55aefe3061a0))
^  Unify: (207) [user] is_asserted_exact(user, loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), true, (0x55aefe3061a0))
^  Call: (208) [user] clause(_84790, _84792, (0x55aefe3061a0))
^  Exit: (208) [user] clause(loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), true, (0x55aefe3061a0))
^  Call: (208) [user] strip_m(loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), _90584)
^  Unify: (208) [user] strip_m(loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Exit: (208) [user] strip_m(loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
   Call: (208) [system] loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')=@=loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
   Exit: (208) [system] loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')=@=loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
^  Call: (208) [user] strip_m(true, _130344)
^  Unify: (208) [user] strip_m(true, true)
^  Exit: (208) [user] strip_m(true, true)
   Call: (208) [system] cl(loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), true)=@=cl(loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), true)
   Exit: (208) [system] cl(loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), true)=@=cl(loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), true)
^  Exit: (207) [user] is_asserted_exact(user, loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), true, (0x55aefe3061a0))
^  Exit: (206) [user] is_asserted_exact(user, loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), true)
^  Exit: (205) [user] is_asserted_exact(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), true)
^  Fail: (204) [user] pfcUnique(post, user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), true)
^  Fail: (203) [user] pfcUnique(post, user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Redo: (202) [user] pfcPost11(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3328, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
   Call: (203) [user] nop(pfcWarn(not_pfcUnique(post, user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))))
   Unify: (203) [user] nop(pfcWarn(not_pfcUnique(post, user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))))
   Exit: (203) [user] nop(pfcWarn(not_pfcUnique(post, user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))))
^  Exit: (202) [user] pfcPost11(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3328, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (200) [locally_each] locally_each:wtl_how(locally_each:trusted_redo_call_cleanup, locally_each:(true==true), user:set_prolog_flag(occurs_check, true), user:catch(pfcPost11(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3328, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _3352, (notrace, wdmsg((user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')=>_3352)), trace)), user:set_prolog_flag(occurs_check, true))
^  Exit: (199) [locally_each] locally_each:wtl(user, set_prolog_flag(occurs_check, true), user:catch(pfcPost11(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3328, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _3352, (notrace, wdmsg((user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')=>_3352)), trace)), user:each_call_cleanup)
^  Exit: (198) [locally_each] locally_each:locally(user:set_prolog_flag(occurs_check, true), user:catch(pfcPost11(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3328, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _3352, (notrace, wdmsg((user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')=>_3352)), trace)))
^  Exit: (197) [user] pfcPost1(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3328, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (196) [user] pfcPost_rev((P;HTML|mfl4(_3328, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax), user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Exit: (195) [user] pfcPost(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3328, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (195) [user] pfcRun
^  Unify: (195) [user] pfcRun
^  Call: (196) [user] pfcGetSearch(direct)
^  Unify: (196) [user] pfcGetSearch(direct)
   Call: (197) [t_l] t_l:pfcSearchTL(_296696)
   Fail: (197) [t_l] t_l:pfcSearchTL(_296696)
^  Redo: (196) [user] pfcGetSearch(direct)
^  Call: (197) [user] pfcSearch(_299470)
^  Unify: (197) [user] pfcSearch(direct)
^  Exit: (197) [user] pfcSearch(direct)
   Call: (197) [system] direct=direct
   Exit: (197) [system] direct=direct
^  Exit: (196) [user] pfcGetSearch(direct)
^  Unify: (195) [user] pfcRun
^  Exit: (195) [user] pfcRun
^  Exit: (194) [user] pfcAdd(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), (P;HTML|mfl4(_3328, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (193) [user] pfcAdd(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Exit: (192) [user] pfcAdd_Now(user:loaded_into_kb('&self', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Call: (192) [user] forall(metta_file_buffer(_328016, _328018, _328020, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _328024), (maplist(maybe_assign, _328020), (must_not_error(do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), _328016, '&self', _328018, _328064))->true;must_det_ll(trace), must_det_ll(pp_m(unknown_do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), _328016, '&self', _328018))))))
^  Unify: (192) [$apply] forall(user:metta_file_buffer(_328016, _328018, _328020, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _328024), user:(maplist(maybe_assign, _328020), (must_not_error(do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), _328016, '&self', _328018, _328064))->true;must_det_ll(trace), must_det_ll(pp_m(unknown_do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), _328016, '&self', _328018))))))
^  Call: (193) [user] metta_file_buffer(_328016, _328018, _328020, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _328024)
^  Unify: (193) [user] metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '$stream_position'(0, 1, 0, 0))
^  Exit: (193) [user] metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (194) [user] apply:maplist(maybe_assign, [])
^  Unify: (194) [apply] apply:maplist(user:maybe_assign, [])
   Call: (195) [apply] apply:maplist_([], user:maybe_assign)
   Unify: (195) [apply] apply:maplist_([], user:maybe_assign)
   Exit: (195) [apply] apply:maplist_([], user:maybe_assign)
^  Exit: (194) [apply] apply:maplist(user:maybe_assign, [])
^  Call: (194) [user] must_not_error(do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1, 0), _328064))
^  Unify: (194) [user] must_not_error(user:do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1, 0), _328064))
   Call: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1, 0), _328064)
   Unify: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1, 0), _328064)
   Call: (196) [system] var('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1, 0))
   Redo: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1, 0), _328064)
   Unify: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1, 0), _328064)
   Call: (196) [system] (+)\==exec
   Exit: (196) [system] (+)\==exec
   Call: (196) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1, 0)==[]
   Redo: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1, 0), _328064)
   Unify: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1, 0), _328064)
   Call: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), comment(+), '&self', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _328064)
   Unify: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), comment(+), '&self', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _328064)
   Call: (197) [system] var(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Redo: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), comment(+), '&self', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _328064)
   Unify: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), comment(+), '&self', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _328064)
   Call: (197) [system] comment(+)\==exec
   Exit: (197) [system] comment(+)\==exec
   Call: (197) [system] ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"==[]
   Redo: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), comment(+), '&self', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _328064)
   Unify: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), comment(+), '&self', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _328064)
^  Call: (197) [user] write_comment(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Unify: (197) [user] write_comment(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Call: (198) [user] is_compatio
^  Unify: (198) [user] is_compatio
^  Call: (200) [system] setup_call_cleanup('$notrace'(_452270, _452272), once(user:is_compatio0), '$restore_trace'(_452270, _452272))
^  Unify: (200) [system] setup_call_cleanup(system:'$notrace'(_452270, _452272), system:once(user:is_compatio0), system:'$restore_trace'(_452270, _452272))
^  Call: (201) [system] sig_atomic(system:'$notrace'(_452270, _452272))
^  Redo: (197) [user] write_comment(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Unify: (197) [user] write_comment(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Call: (198) [user] silent_loading
^  Unify: (198) [user] silent_loading
^  Call: (199) [user] option_value(load, silent)
^  Unify: (199) [user] option_value(load, silent)
   Call: (200) [system] var(silent)
   Fail: (200) [system] var(silent)
^  Redo: (199) [user] option_value(load, silent)
^  Unify: (199) [user] option_value(load, silent)
   Call: (200) [system] silent==true
   Fail: (200) [system] silent==true
^  Redo: (199) [user] option_value(load, silent)
^  Unify: (199) [user] option_value(load, silent)
   Call: (200) [system] silent==false
   Fail: (200) [system] silent==false
^  Redo: (199) [user] option_value(load, silent)
^  Unify: (199) [user] option_value(load, silent)
^  Call: (201) [system] setup_call_cleanup('$notrace'(_471786, _471788), once(user:option_value0(load, silent)), '$restore_trace'(_471786, _471788))
^  Unify: (201) [system] setup_call_cleanup(system:'$notrace'(_471786, _471788), system:once(user:option_value0(load, silent)), system:'$restore_trace'(_471786, _471788))
^  Call: (202) [system] sig_atomic(system:'$notrace'(_471786, _471788))
^  Fail: (199) [user] option_value(load, silent)
^  Redo: (198) [user] silent_loading
^  Unify: (198) [user] silent_loading
^  Call: (199) [user] is_converting
^  Unify: (199) [user] is_converting
^  Call: (200) [user] is_metta_flag(convert)
^  Unify: (200) [user] is_metta_flag(convert)
^  Call: (202) [system] setup_call_cleanup('$notrace'(_481076, _481078), once(user:is_flag0(convert)), '$restore_trace'(_481076, _481078))
^  Unify: (202) [system] setup_call_cleanup(system:'$notrace'(_481076, _481078), system:once(user:is_flag0(convert)), system:'$restore_trace'(_481076, _481078))
^  Call: (203) [system] sig_atomic(system:'$notrace'(_481076, _481078))
^  Fail: (200) [user] is_metta_flag(convert)
^  Fail: (199) [user] is_converting
^  Redo: (198) [user] silent_loading
^  Unify: (198) [user] silent_loading
^  Call: (199) [user] option_value(html, 'True')
^  Unify: (199) [user] option_value(html, 'True')
   Call: (200) [system] var('True')
   Fail: (200) [system] var('True')
^  Redo: (199) [user] option_value(html, 'True')
^  Unify: (199) [user] option_value(html, 'True')
   Call: (200) [system] 'True'==true
   Fail: (200) [system] 'True'==true
^  Redo: (199) [user] option_value(html, 'True')
^  Unify: (199) [user] option_value(html, 'True')
   Call: (200) [system] 'True'==false
   Fail: (200) [system] 'True'==false
^  Redo: (199) [user] option_value(html, 'True')
^  Unify: (199) [user] option_value(html, 'True')
^  Call: (201) [system] setup_call_cleanup('$notrace'(_500584, _500586), once(user:option_value0(html, 'True')), '$restore_trace'(_500584, _500586))
^  Unify: (201) [system] setup_call_cleanup(system:'$notrace'(_500584, _500586), system:once(user:option_value0(html, 'True')), system:'$restore_trace'(_500584, _500586))
^  Call: (202) [system] sig_atomic(system:'$notrace'(_500584, _500586))
^  Exit: (201) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:option_value0(html, 'True')), system:'$restore_trace'(3, -1))
^  Exit: (199) [user] option_value(html, 'True')
   Call: (199) [system] fail
^  Redo: (197) [user] write_comment(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Unify: (197) [user] write_comment(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Call: (198) [user] connlf
^  Unify: (198) [user] connlf
^  Call: (199) [user] check_silent_loading
^  Unify: (199) [user] check_silent_loading
^  Exit: (199) [user] check_silent_loading
^  Call: (199) [user] not_compat_io(format('~N'))
^  Unify: (199) [user] not_compat_io(format('~N'))
^  Call: (200) [user] not_compatio(format('~N'))
^  Unify: (200) [user] not_compatio(format('~N'))
^  Call: (201) [user] if_t(once((is_mettalog;is_testing)), user_err(format('~N')))
^  Unify: (201) [user] if_t(once((is_mettalog;is_testing)), user_err(format('~N')))
^  Call: (202) [user] once((is_mettalog;is_testing))
^  Unify: (202) [system] once(user:(is_mettalog;is_testing))
^  Call: (204) [user] is_mettalog
^  Unify: (204) [user] is_mettalog
^  Call: (205) [user] is_win64
^  Unify: (205) [user] is_win64
   Call: (206) [system] current_prolog_flag(windows, _3536)
   Fail: (206) [system] current_prolog_flag(windows, _4304)
^  Fail: (205) [user] is_win64
^  Redo: (204) [user] is_mettalog
^  Unify: (204) [user] is_mettalog
^  Call: (205) [user] is_metta_flag(log)
^  Unify: (205) [user] is_metta_flag(log)
^  Call: (207) [system] setup_call_cleanup('$notrace'(_9764, _9766), once(user:is_flag0(log)), '$restore_trace'(_9764, _9766))
^  Unify: (207) [system] setup_call_cleanup(system:'$notrace'(_9764, _9766), system:once(user:is_flag0(log)), system:'$restore_trace'(_9764, _9766))
^  Call: (208) [system] sig_atomic(system:'$notrace'(_9764, _9766))
^  Fail: (205) [user] is_metta_flag(log)
^  Fail: (204) [user] is_mettalog
^  Call: (204) [user] is_testing
^  Unify: (204) [user] is_testing
^  Call: (205) [user] is_metta_flag(test)
^  Unify: (205) [user] is_metta_flag(test)
^  Call: (207) [system] setup_call_cleanup('$notrace'(_18134, _18136), once(user:is_flag0(test)), '$restore_trace'(_18134, _18136))
^  Unify: (207) [system] setup_call_cleanup(system:'$notrace'(_18134, _18136), system:once(user:is_flag0(test)), system:'$restore_trace'(_18134, _18136))
^  Call: (208) [system] sig_atomic(system:'$notrace'(_18134, _18136))
^  Exit: (207) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:is_flag0(test)), system:'$restore_trace'(3, -1))
^  Exit: (205) [user] is_metta_flag(test)
^  Exit: (204) [user] is_testing
^  Exit: (202) [system] once(user:(is_mettalog;is_testing))
^  Call: (202) [user] user_err(format('~N'))
^  Unify: (202) [user] user_err(format('~N'))
^  Call: (203) [user] original_user_error(_26530)
^  Unify: (203) [user] original_user_error(_26530)
   Call: (204) [system] stream_property(_26530, file_no(2))
   Unify: (204) [system] stream_property(_26530, file_no(2))
   Call: (205) [system] nonvar(_26530)
   Redo: (204) [system] stream_property(_26530, file_no(2))
   Unify: (204) [system] stream_property(_26530, file_no(2))
   Call: (205) [system] nonvar(_26530)
   Redo: (204) [system] stream_property(_26530, file_no(2))
   Unify: (204) [system] stream_property(_26530, file_no(2))
   Call: (205) [system] nonvar(file_no(2))
   Exit: (205) [system] nonvar(file_no(2))
   Call: (205) [system] file_no(2)=alias(_37650)
   Redo: (204) [system] stream_property(_26530, file_no(2))
   Exit: (204) [system] stream_property((0x7f675162f200), file_no(2))
^  Exit: (203) [user] original_user_error((0x7f675162f200))
^  Call: (203) [user] with_output_to((0x7f675162f200), format('~N'))
   Call: (205) [$syspreds] format('~N')
   Unify: (205) [$syspreds] format('~N')
^  Call: (206) [$syspreds] format('~N', [])
^  Exit: (206) [$syspreds] format('~N', [])
   Exit: (205) [$syspreds] format('~N')
^  Exit: (203) [user] with_output_to((0x7f675162f200), format('~N'))
^  Exit: (202) [user] user_err(format('~N'))
^  Exit: (201) [user] if_t(once((is_mettalog;is_testing)), user_err(format('~N')))
^  Exit: (200) [user] not_compatio(format('~N'))
^  Exit: (199) [user] not_compat_io(format('~N'))
^  Exit: (198) [user] connlf
^  Call: (198) [user] format(';;~w~n', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"])
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
^  Exit: (198) [user] format(';;~w~n', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"])
^  Exit: (197) [user] write_comment(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Call: (197) [user] ignore((symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), symbolic_list_concat([_55364, _55370], 'MeTTaLog only: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), !, atom_string(_55370, _55390), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _55390, _3362)))
^  Unify: (197) [system] ignore(user:(symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), symbolic_list_concat([_55364, _55370], 'MeTTaLog only: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), !, atom_string(_55370, _55390), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _55390, _3362)))
^  Call: (199) [user] symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Unify: (199) [user] symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Call: (200) [system] atomic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Exit: (200) [system] atomic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Exit: (199) [user] symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Call: (199) [user] symbolic_list_concat([_55364, _55370], 'MeTTaLog only: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Unify: (199) [user] symbolic_list_concat([_55364, _55370], 'MeTTaLog only: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Call: (200) [system] atomic_list_concat([_55364, _55370], 'MeTTaLog only: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Fail: (200) [system] atomic_list_concat([_55364, _55370], 'MeTTaLog only: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Fail: (199) [user] symbolic_list_concat([_55364, _55370], 'MeTTaLog only: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (197) [system] ignore(user:(symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), symbolic_list_concat([_55364, _55370], 'MeTTaLog only: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), !, atom_string(_55370, _55390), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _55390, _3362)))
^  Unify: (197) [system] ignore(user:(symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), symbolic_list_concat([_55364, _55370], 'MeTTaLog only: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), !, atom_string(_55370, _55390), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _55390, _3362)))
^  Exit: (197) [system] ignore(user:(symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), symbolic_list_concat([_55364, _55370], 'MeTTaLog only: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), !, atom_string(_55370, _55390), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _55390, _3362)))
^  Call: (197) [user] ignore((symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), symbolic_list_concat([_88880, _55370], 'MeTTaLog: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), !, atom_string(_55370, _55390), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _55390, _3362)))
^  Unify: (197) [system] ignore(user:(symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), symbolic_list_concat([_88880, _55370], 'MeTTaLog: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), !, atom_string(_55370, _55390), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _55390, _3362)))
^  Call: (199) [user] symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Unify: (199) [user] symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Call: (200) [system] atomic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Exit: (200) [system] atomic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Exit: (199) [user] symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Call: (199) [user] symbolic_list_concat([_88880, _55370], 'MeTTaLog: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Unify: (199) [user] symbolic_list_concat([_88880, _55370], 'MeTTaLog: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Call: (200) [system] atomic_list_concat([_88880, _55370], 'MeTTaLog: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Fail: (200) [system] atomic_list_concat([_88880, _55370], 'MeTTaLog: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Fail: (199) [user] symbolic_list_concat([_88880, _55370], 'MeTTaLog: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (197) [system] ignore(user:(symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), symbolic_list_concat([_88880, _55370], 'MeTTaLog: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), !, atom_string(_55370, _55390), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _55390, _3362)))
^  Unify: (197) [system] ignore(user:(symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), symbolic_list_concat([_88880, _55370], 'MeTTaLog: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), !, atom_string(_55370, _55390), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _55390, _3362)))
^  Exit: (197) [system] ignore(user:(symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), symbolic_list_concat([_88880, _55370], 'MeTTaLog: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), !, atom_string(_55370, _55390), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _55390, _3362)))
   Exit: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), comment(+), '&self', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _3362)
   Exit: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1, 0), _3362)
^  Exit: (194) [user] must_not_error(user:do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1, 0), _3362))
^  Redo: (193) [user] metta_file_buffer(_3314, _3316, _3318, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _3322)
^  Unify: (193) [user] metta_file_buffer(+, '$COMMENT'("; Converted Rust Tests with Original Source", 2, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '$stream_position'(0, 1, 0, 0))
^  Exit: (193) [user] metta_file_buffer(+, '$COMMENT'("; Converted Rust Tests with Original Source", 2, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (194) [user] apply:maplist(maybe_assign, [])
^  Unify: (194) [apply] apply:maplist(user:maybe_assign, [])
   Call: (195) [apply] apply:maplist_([], user:maybe_assign)
   Unify: (195) [apply] apply:maplist_([], user:maybe_assign)
   Exit: (195) [apply] apply:maplist_([], user:maybe_assign)
^  Exit: (194) [apply] apply:maplist(user:maybe_assign, [])
^  Call: (194) [user] must_not_error(do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'("; Converted Rust Tests with Original Source", 2, 0), _3362))
^  Unify: (194) [user] must_not_error(user:do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'("; Converted Rust Tests with Original Source", 2, 0), _3362))
   Call: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'("; Converted Rust Tests with Original Source", 2, 0), _3362)
   Unify: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'("; Converted Rust Tests with Original Source", 2, 0), _3362)
   Call: (196) [system] var('$COMMENT'("; Converted Rust Tests with Original Source", 2, 0))
   Redo: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'("; Converted Rust Tests with Original Source", 2, 0), _3362)
   Unify: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'("; Converted Rust Tests with Original Source", 2, 0), _3362)
   Call: (196) [system] (+)\==exec
   Exit: (196) [system] (+)\==exec
   Call: (196) [system] '$COMMENT'("; Converted Rust Tests with Original Source", 2, 0)==[]
   Redo: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'("; Converted Rust Tests with Original Source", 2, 0), _3362)
   Unify: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'("; Converted Rust Tests with Original Source", 2, 0), _3362)
   Call: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), comment(+), '&self', "; Converted Rust Tests with Original Source", _3362)
   Unify: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), comment(+), '&self', "; Converted Rust Tests with Original Source", _3362)
   Call: (197) [system] var("; Converted Rust Tests with Original Source")
   Redo: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), comment(+), '&self', "; Converted Rust Tests with Original Source", _3362)
   Unify: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), comment(+), '&self', "; Converted Rust Tests with Original Source", _3362)
   Call: (197) [system] comment(+)\==exec
   Exit: (197) [system] comment(+)\==exec
   Call: (197) [system] "; Converted Rust Tests with Original Source"==[]
   Redo: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), comment(+), '&self', "; Converted Rust Tests with Original Source", _3362)
   Unify: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), comment(+), '&self', "; Converted Rust Tests with Original Source", _3362)
^  Call: (197) [user] write_comment("; Converted Rust Tests with Original Source")
^  Unify: (197) [user] write_comment("; Converted Rust Tests with Original Source")
^  Call: (198) [user] is_compatio
^  Unify: (198) [user] is_compatio
^  Call: (200) [system] setup_call_cleanup('$notrace'(_235734, _235736), once(user:is_compatio0), '$restore_trace'(_235734, _235736))
^  Unify: (200) [system] setup_call_cleanup(system:'$notrace'(_235734, _235736), system:once(user:is_compatio0), system:'$restore_trace'(_235734, _235736))
^  Call: (201) [system] sig_atomic(system:'$notrace'(_235734, _235736))
^  Redo: (197) [user] write_comment("; Converted Rust Tests with Original Source")
^  Unify: (197) [user] write_comment("; Converted Rust Tests with Original Source")
^  Call: (198) [user] silent_loading
^  Unify: (198) [user] silent_loading
^  Call: (199) [user] option_value(load, silent)
^  Unify: (199) [user] option_value(load, silent)
   Call: (200) [system] var(silent)
   Fail: (200) [system] var(silent)
^  Redo: (199) [user] option_value(load, silent)
^  Unify: (199) [user] option_value(load, silent)
   Call: (200) [system] silent==true
   Fail: (200) [system] silent==true
^  Redo: (199) [user] option_value(load, silent)
^  Unify: (199) [user] option_value(load, silent)
   Call: (200) [system] silent==false
   Fail: (200) [system] silent==false
^  Redo: (199) [user] option_value(load, silent)
^  Unify: (199) [user] option_value(load, silent)
^  Call: (201) [system] setup_call_cleanup('$notrace'(_255250, _255252), once(user:option_value0(load, silent)), '$restore_trace'(_255250, _255252))
^  Unify: (201) [system] setup_call_cleanup(system:'$notrace'(_255250, _255252), system:once(user:option_value0(load, silent)), system:'$restore_trace'(_255250, _255252))
^  Call: (202) [system] sig_atomic(system:'$notrace'(_255250, _255252))
^  Fail: (199) [user] option_value(load, silent)
^  Redo: (198) [user] silent_loading
^  Unify: (198) [user] silent_loading
^  Call: (199) [user] is_converting
^  Unify: (199) [user] is_converting
^  Call: (200) [user] is_metta_flag(convert)
^  Unify: (200) [user] is_metta_flag(convert)
^  Call: (202) [system] setup_call_cleanup('$notrace'(_264540, _264542), once(user:is_flag0(convert)), '$restore_trace'(_264540, _264542))
^  Unify: (202) [system] setup_call_cleanup(system:'$notrace'(_264540, _264542), system:once(user:is_flag0(convert)), system:'$restore_trace'(_264540, _264542))
^  Call: (203) [system] sig_atomic(system:'$notrace'(_264540, _264542))
^  Fail: (200) [user] is_metta_flag(convert)
^  Fail: (199) [user] is_converting
^  Redo: (198) [user] silent_loading
^  Unify: (198) [user] silent_loading
^  Call: (199) [user] option_value(html, 'True')
^  Unify: (199) [user] option_value(html, 'True')
   Call: (200) [system] var('True')
   Fail: (200) [system] var('True')
^  Redo: (199) [user] option_value(html, 'True')
^  Unify: (199) [user] option_value(html, 'True')
   Call: (200) [system] 'True'==true
   Fail: (200) [system] 'True'==true
^  Redo: (199) [user] option_value(html, 'True')
^  Unify: (199) [user] option_value(html, 'True')
   Call: (200) [system] 'True'==false
   Fail: (200) [system] 'True'==false
^  Redo: (199) [user] option_value(html, 'True')
^  Unify: (199) [user] option_value(html, 'True')
^  Call: (201) [system] setup_call_cleanup('$notrace'(_284048, _284050), once(user:option_value0(html, 'True')), '$restore_trace'(_284048, _284050))
^  Unify: (201) [system] setup_call_cleanup(system:'$notrace'(_284048, _284050), system:once(user:option_value0(html, 'True')), system:'$restore_trace'(_284048, _284050))
^  Call: (202) [system] sig_atomic(system:'$notrace'(_284048, _284050))
^  Exit: (201) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:option_value0(html, 'True')), system:'$restore_trace'(3, -1))
^  Exit: (199) [user] option_value(html, 'True')
   Call: (199) [system] fail
^  Redo: (197) [user] write_comment("; Converted Rust Tests with Original Source")
^  Unify: (197) [user] write_comment("; Converted Rust Tests with Original Source")
^  Call: (198) [user] connlf
^  Unify: (198) [user] connlf
^  Call: (199) [user] check_silent_loading
^  Unify: (199) [user] check_silent_loading
^  Exit: (199) [user] check_silent_loading
^  Call: (199) [user] not_compat_io(format('~N'))
^  Unify: (199) [user] not_compat_io(format('~N'))
^  Call: (200) [user] not_compatio(format('~N'))
^  Unify: (200) [user] not_compatio(format('~N'))
^  Call: (201) [user] if_t(once((is_mettalog;is_testing)), user_err(format('~N')))
^  Unify: (201) [user] if_t(once((is_mettalog;is_testing)), user_err(format('~N')))
^  Call: (202) [user] once((is_mettalog;is_testing))
^  Unify: (202) [system] once(user:(is_mettalog;is_testing))
^  Call: (204) [user] is_mettalog
^  Unify: (204) [user] is_mettalog
^  Call: (205) [user] is_win64
^  Unify: (205) [user] is_win64
   Call: (206) [system] current_prolog_flag(windows, _307300)
   Fail: (206) [system] current_prolog_flag(windows, _308228)
^  Fail: (205) [user] is_win64
^  Redo: (204) [user] is_mettalog
^  Unify: (204) [user] is_mettalog
^  Call: (205) [user] is_metta_flag(log)
^  Unify: (205) [user] is_metta_flag(log)
^  Call: (207) [system] setup_call_cleanup('$notrace'(_313688, _313690), once(user:is_flag0(log)), '$restore_trace'(_313688, _313690))
^  Unify: (207) [system] setup_call_cleanup(system:'$notrace'(_313688, _313690), system:once(user:is_flag0(log)), system:'$restore_trace'(_313688, _313690))
^  Call: (208) [system] sig_atomic(system:'$notrace'(_313688, _313690))
^  Fail: (205) [user] is_metta_flag(log)
^  Fail: (204) [user] is_mettalog
^  Call: (204) [user] is_testing
^  Unify: (204) [user] is_testing
^  Call: (205) [user] is_metta_flag(test)
^  Unify: (205) [user] is_metta_flag(test)
^  Call: (207) [system] setup_call_cleanup('$notrace'(_322058, _322060), once(user:is_flag0(test)), '$restore_trace'(_322058, _322060))
^  Unify: (207) [system] setup_call_cleanup(system:'$notrace'(_322058, _322060), system:once(user:is_flag0(test)), system:'$restore_trace'(_322058, _322060))
^  Call: (208) [system] sig_atomic(system:'$notrace'(_322058, _322060))
^  Exit: (207) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:is_flag0(test)), system:'$restore_trace'(3, -1))
^  Exit: (205) [user] is_metta_flag(test)
^  Exit: (204) [user] is_testing
^  Exit: (202) [system] once(user:(is_mettalog;is_testing))
^  Call: (202) [user] user_err(format('~N'))
^  Unify: (202) [user] user_err(format('~N'))
^  Call: (203) [user] original_user_error(_330454)
^  Unify: (203) [user] original_user_error(_330454)
   Call: (204) [system] stream_property(_330454, file_no(2))
   Unify: (204) [system] stream_property(_330454, file_no(2))
   Call: (205) [system] nonvar(_330454)
   Redo: (204) [system] stream_property(_330454, file_no(2))
   Unify: (204) [system] stream_property(_330454, file_no(2))
   Call: (205) [system] nonvar(_330454)
   Redo: (204) [system] stream_property(_330454, file_no(2))
   Unify: (204) [system] stream_property(_330454, file_no(2))
   Call: (205) [system] nonvar(file_no(2))
   Exit: (205) [system] nonvar(file_no(2))
   Call: (205) [system] file_no(2)=alias(_341574)
   Redo: (204) [system] stream_property(_330454, file_no(2))
   Exit: (204) [system] stream_property((0x7f675162f200), file_no(2))
^  Exit: (203) [user] original_user_error((0x7f675162f200))
^  Call: (203) [user] with_output_to((0x7f675162f200), format('~N'))
   Call: (205) [$syspreds] format('~N')
   Unify: (205) [$syspreds] format('~N')
^  Call: (206) [$syspreds] format('~N', [])
^  Exit: (206) [$syspreds] format('~N', [])
   Exit: (205) [$syspreds] format('~N')
^  Exit: (203) [user] with_output_to((0x7f675162f200), format('~N'))
^  Exit: (202) [user] user_err(format('~N'))
^  Exit: (201) [user] if_t(once((is_mettalog;is_testing)), user_err(format('~N')))
^  Exit: (200) [user] not_compatio(format('~N'))
^  Exit: (199) [user] not_compat_io(format('~N'))
^  Exit: (198) [user] connlf
^  Call: (198) [user] format(';;~w~n', ["; Converted Rust Tests with Original Source"])
;;; Converted Rust Tests with Original Source
^  Exit: (198) [user] format(';;~w~n', ["; Converted Rust Tests with Original Source"])
^  Exit: (197) [user] write_comment("; Converted Rust Tests with Original Source")
^  Call: (197) [user] ignore((symbolic("; Converted Rust Tests with Original Source"), symbolic_list_concat([_359288, _359294], 'MeTTaLog only: ', "; Converted Rust Tests with Original Source"), !, atom_string(_359294, _359314), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _359314, _3362)))
^  Unify: (197) [system] ignore(user:(symbolic("; Converted Rust Tests with Original Source"), symbolic_list_concat([_359288, _359294], 'MeTTaLog only: ', "; Converted Rust Tests with Original Source"), !, atom_string(_359294, _359314), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _359314, _3362)))
^  Call: (199) [user] symbolic("; Converted Rust Tests with Original Source")
^  Unify: (199) [user] symbolic("; Converted Rust Tests with Original Source")
   Call: (200) [system] atomic("; Converted Rust Tests with Original Source")
   Exit: (200) [system] atomic("; Converted Rust Tests with Original Source")
^  Exit: (199) [user] symbolic("; Converted Rust Tests with Original Source")
^  Call: (199) [user] symbolic_list_concat([_359288, _359294], 'MeTTaLog only: ', "; Converted Rust Tests with Original Source")
^  Unify: (199) [user] symbolic_list_concat([_359288, _359294], 'MeTTaLog only: ', "; Converted Rust Tests with Original Source")
   Call: (200) [system] atomic_list_concat([_359288, _359294], 'MeTTaLog only: ', "; Converted Rust Tests with Original Source")
   Fail: (200) [system] atomic_list_concat([_359288, _359294], 'MeTTaLog only: ', "; Converted Rust Tests with Original Source")
^  Fail: (199) [user] symbolic_list_concat([_359288, _359294], 'MeTTaLog only: ', "; Converted Rust Tests with Original Source")
^  Redo: (197) [system] ignore(user:(symbolic("; Converted Rust Tests with Original Source"), symbolic_list_concat([_359288, _359294], 'MeTTaLog only: ', "; Converted Rust Tests with Original Source"), !, atom_string(_359294, _359314), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _359314, _3362)))
^  Unify: (197) [system] ignore(user:(symbolic("; Converted Rust Tests with Original Source"), symbolic_list_concat([_359288, _359294], 'MeTTaLog only: ', "; Converted Rust Tests with Original Source"), !, atom_string(_359294, _359314), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _359314, _3362)))
^  Exit: (197) [system] ignore(user:(symbolic("; Converted Rust Tests with Original Source"), symbolic_list_concat([_359288, _359294], 'MeTTaLog only: ', "; Converted Rust Tests with Original Source"), !, atom_string(_359294, _359314), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _359314, _3362)))
^  Call: (197) [user] ignore((symbolic("; Converted Rust Tests with Original Source"), symbolic_list_concat([_392804, _359294], 'MeTTaLog: ', "; Converted Rust Tests with Original Source"), !, atom_string(_359294, _359314), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _359314, _3362)))
^  Unify: (197) [system] ignore(user:(symbolic("; Converted Rust Tests with Original Source"), symbolic_list_concat([_392804, _359294], 'MeTTaLog: ', "; Converted Rust Tests with Original Source"), !, atom_string(_359294, _359314), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _359314, _3362)))
^  Call: (199) [user] symbolic("; Converted Rust Tests with Original Source")
^  Unify: (199) [user] symbolic("; Converted Rust Tests with Original Source")
   Call: (200) [system] atomic("; Converted Rust Tests with Original Source")
   Exit: (200) [system] atomic("; Converted Rust Tests with Original Source")
^  Exit: (199) [user] symbolic("; Converted Rust Tests with Original Source")
^  Call: (199) [user] symbolic_list_concat([_392804, _359294], 'MeTTaLog: ', "; Converted Rust Tests with Original Source")
^  Unify: (199) [user] symbolic_list_concat([_392804, _359294], 'MeTTaLog: ', "; Converted Rust Tests with Original Source")
   Call: (200) [system] atomic_list_concat([_392804, _359294], 'MeTTaLog: ', "; Converted Rust Tests with Original Source")
   Fail: (200) [system] atomic_list_concat([_392804, _359294], 'MeTTaLog: ', "; Converted Rust Tests with Original Source")
^  Fail: (199) [user] symbolic_list_concat([_392804, _359294], 'MeTTaLog: ', "; Converted Rust Tests with Original Source")
^  Redo: (197) [system] ignore(user:(symbolic("; Converted Rust Tests with Original Source"), symbolic_list_concat([_392804, _359294], 'MeTTaLog: ', "; Converted Rust Tests with Original Source"), !, atom_string(_359294, _359314), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _359314, _3362)))
^  Unify: (197) [system] ignore(user:(symbolic("; Converted Rust Tests with Original Source"), symbolic_list_concat([_392804, _359294], 'MeTTaLog: ', "; Converted Rust Tests with Original Source"), !, atom_string(_359294, _359314), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _359314, _3362)))
^  Exit: (197) [system] ignore(user:(symbolic("; Converted Rust Tests with Original Source"), symbolic_list_concat([_392804, _359294], 'MeTTaLog: ', "; Converted Rust Tests with Original Source"), !, atom_string(_359294, _359314), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _359314, _3362)))
   Exit: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), comment(+), '&self', "; Converted Rust Tests with Original Source", _3362)
   Exit: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'("; Converted Rust Tests with Original Source", 2, 0), _3362)
^  Exit: (194) [user] must_not_error(user:do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'("; Converted Rust Tests with Original Source", 2, 0), _3362))
^  Redo: (193) [user] metta_file_buffer(_3314, _3316, _3318, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _3322)
^  Unify: (193) [user] metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 3, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '$stream_position'(0, 1, 0, 0))
^  Exit: (193) [user] metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 3, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (194) [user] apply:maplist(maybe_assign, [])
^  Unify: (194) [apply] apply:maplist(user:maybe_assign, [])
   Call: (195) [apply] apply:maplist_([], user:maybe_assign)
   Unify: (195) [apply] apply:maplist_([], user:maybe_assign)
   Exit: (195) [apply] apply:maplist_([], user:maybe_assign)
^  Exit: (194) [apply] apply:maplist(user:maybe_assign, [])
^  Call: (194) [user] must_not_error(do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 3, 0), _3362))
^  Unify: (194) [user] must_not_error(user:do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 3, 0), _3362))
   Call: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 3, 0), _3362)
   Unify: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 3, 0), _3362)
   Call: (196) [system] var('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 3, 0))
   Redo: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 3, 0), _3362)
   Unify: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 3, 0), _3362)
   Call: (196) [system] (+)\==exec
   Exit: (196) [system] (+)\==exec
   Call: (196) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 3, 0)==[]
   Redo: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 3, 0), _3362)
   Unify: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 3, 0), _3362)
   Call: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), comment(+), '&self', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _3362)
   Unify: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), comment(+), '&self', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _3362)
   Call: (197) [system] var(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Redo: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), comment(+), '&self', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _3362)
   Unify: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), comment(+), '&self', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _3362)
   Call: (197) [system] comment(+)\==exec
   Exit: (197) [system] comment(+)\==exec
   Call: (197) [system] ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"==[]
   Redo: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), comment(+), '&self', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _3362)
   Unify: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), comment(+), '&self', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _3362)
^  Call: (197) [user] write_comment(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Unify: (197) [user] write_comment(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Call: (198) [user] is_compatio
^  Unify: (198) [user] is_compatio
^  Call: (200) [system] setup_call_cleanup('$notrace'(_20558, _20560), once(user:is_compatio0), '$restore_trace'(_20558, _20560))
^  Unify: (200) [system] setup_call_cleanup(system:'$notrace'(_20558, _20560), system:once(user:is_compatio0), system:'$restore_trace'(_20558, _20560))
^  Call: (201) [system] sig_atomic(system:'$notrace'(_20558, _20560))
^  Redo: (197) [user] write_comment(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Unify: (197) [user] write_comment(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Call: (198) [user] silent_loading
^  Unify: (198) [user] silent_loading
^  Call: (199) [user] option_value(load, silent)
^  Unify: (199) [user] option_value(load, silent)
   Call: (200) [system] var(silent)
   Fail: (200) [system] var(silent)
^  Redo: (199) [user] option_value(load, silent)
^  Unify: (199) [user] option_value(load, silent)
   Call: (200) [system] silent==true
   Fail: (200) [system] silent==true
^  Redo: (199) [user] option_value(load, silent)
^  Unify: (199) [user] option_value(load, silent)
   Call: (200) [system] silent==false
   Fail: (200) [system] silent==false
^  Redo: (199) [user] option_value(load, silent)
^  Unify: (199) [user] option_value(load, silent)
^  Call: (201) [system] setup_call_cleanup('$notrace'(_40074, _40076), once(user:option_value0(load, silent)), '$restore_trace'(_40074, _40076))
^  Unify: (201) [system] setup_call_cleanup(system:'$notrace'(_40074, _40076), system:once(user:option_value0(load, silent)), system:'$restore_trace'(_40074, _40076))
^  Call: (202) [system] sig_atomic(system:'$notrace'(_40074, _40076))
^  Fail: (199) [user] option_value(load, silent)
^  Redo: (198) [user] silent_loading
^  Unify: (198) [user] silent_loading
^  Call: (199) [user] is_converting
^  Unify: (199) [user] is_converting
^  Call: (200) [user] is_metta_flag(convert)
^  Unify: (200) [user] is_metta_flag(convert)
^  Call: (202) [system] setup_call_cleanup('$notrace'(_49364, _49366), once(user:is_flag0(convert)), '$restore_trace'(_49364, _49366))
^  Unify: (202) [system] setup_call_cleanup(system:'$notrace'(_49364, _49366), system:once(user:is_flag0(convert)), system:'$restore_trace'(_49364, _49366))
^  Call: (203) [system] sig_atomic(system:'$notrace'(_49364, _49366))
^  Fail: (200) [user] is_metta_flag(convert)
^  Fail: (199) [user] is_converting
^  Redo: (198) [user] silent_loading
^  Unify: (198) [user] silent_loading
^  Call: (199) [user] option_value(html, 'True')
^  Unify: (199) [user] option_value(html, 'True')
   Call: (200) [system] var('True')
   Fail: (200) [system] var('True')
^  Redo: (199) [user] option_value(html, 'True')
^  Unify: (199) [user] option_value(html, 'True')
   Call: (200) [system] 'True'==true
   Fail: (200) [system] 'True'==true
^  Redo: (199) [user] option_value(html, 'True')
^  Unify: (199) [user] option_value(html, 'True')
   Call: (200) [system] 'True'==false
   Fail: (200) [system] 'True'==false
^  Redo: (199) [user] option_value(html, 'True')
^  Unify: (199) [user] option_value(html, 'True')
^  Call: (201) [system] setup_call_cleanup('$notrace'(_68872, _68874), once(user:option_value0(html, 'True')), '$restore_trace'(_68872, _68874))
^  Unify: (201) [system] setup_call_cleanup(system:'$notrace'(_68872, _68874), system:once(user:option_value0(html, 'True')), system:'$restore_trace'(_68872, _68874))
^  Call: (202) [system] sig_atomic(system:'$notrace'(_68872, _68874))
^  Exit: (201) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:option_value0(html, 'True')), system:'$restore_trace'(3, -1))
^  Exit: (199) [user] option_value(html, 'True')
   Call: (199) [system] fail
^  Redo: (197) [user] write_comment(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Unify: (197) [user] write_comment(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Call: (198) [user] connlf
^  Unify: (198) [user] connlf
^  Call: (199) [user] check_silent_loading
^  Unify: (199) [user] check_silent_loading
^  Exit: (199) [user] check_silent_loading
^  Call: (199) [user] not_compat_io(format('~N'))
^  Unify: (199) [user] not_compat_io(format('~N'))
^  Call: (200) [user] not_compatio(format('~N'))
^  Unify: (200) [user] not_compatio(format('~N'))
^  Call: (201) [user] if_t(once((is_mettalog;is_testing)), user_err(format('~N')))
^  Unify: (201) [user] if_t(once((is_mettalog;is_testing)), user_err(format('~N')))
^  Call: (202) [user] once((is_mettalog;is_testing))
^  Unify: (202) [system] once(user:(is_mettalog;is_testing))
^  Call: (204) [user] is_mettalog
^  Unify: (204) [user] is_mettalog
^  Call: (205) [user] is_win64
^  Unify: (205) [user] is_win64
   Call: (206) [system] current_prolog_flag(windows, _92124)
   Fail: (206) [system] current_prolog_flag(windows, _93052)
^  Fail: (205) [user] is_win64
^  Redo: (204) [user] is_mettalog
^  Unify: (204) [user] is_mettalog
^  Call: (205) [user] is_metta_flag(log)
^  Unify: (205) [user] is_metta_flag(log)
^  Call: (207) [system] setup_call_cleanup('$notrace'(_98512, _98514), once(user:is_flag0(log)), '$restore_trace'(_98512, _98514))
^  Unify: (207) [system] setup_call_cleanup(system:'$notrace'(_98512, _98514), system:once(user:is_flag0(log)), system:'$restore_trace'(_98512, _98514))
^  Call: (208) [system] sig_atomic(system:'$notrace'(_98512, _98514))
^  Fail: (205) [user] is_metta_flag(log)
^  Fail: (204) [user] is_mettalog
^  Call: (204) [user] is_testing
^  Unify: (204) [user] is_testing
^  Call: (205) [user] is_metta_flag(test)
^  Unify: (205) [user] is_metta_flag(test)
^  Call: (207) [system] setup_call_cleanup('$notrace'(_106882, _106884), once(user:is_flag0(test)), '$restore_trace'(_106882, _106884))
^  Unify: (207) [system] setup_call_cleanup(system:'$notrace'(_106882, _106884), system:once(user:is_flag0(test)), system:'$restore_trace'(_106882, _106884))
^  Call: (208) [system] sig_atomic(system:'$notrace'(_106882, _106884))
^  Exit: (207) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:is_flag0(test)), system:'$restore_trace'(3, -1))
^  Exit: (205) [user] is_metta_flag(test)
^  Exit: (204) [user] is_testing
^  Exit: (202) [system] once(user:(is_mettalog;is_testing))
^  Call: (202) [user] user_err(format('~N'))
^  Unify: (202) [user] user_err(format('~N'))
^  Call: (203) [user] original_user_error(_115278)
^  Unify: (203) [user] original_user_error(_115278)
   Call: (204) [system] stream_property(_115278, file_no(2))
   Unify: (204) [system] stream_property(_115278, file_no(2))
   Call: (205) [system] nonvar(_115278)
   Redo: (204) [system] stream_property(_115278, file_no(2))
   Unify: (204) [system] stream_property(_115278, file_no(2))
   Call: (205) [system] nonvar(_115278)
   Redo: (204) [system] stream_property(_115278, file_no(2))
   Unify: (204) [system] stream_property(_115278, file_no(2))
   Call: (205) [system] nonvar(file_no(2))
   Exit: (205) [system] nonvar(file_no(2))
   Call: (205) [system] file_no(2)=alias(_126398)
   Redo: (204) [system] stream_property(_115278, file_no(2))
   Exit: (204) [system] stream_property((0x7f675162f200), file_no(2))
^  Exit: (203) [user] original_user_error((0x7f675162f200))
^  Call: (203) [user] with_output_to((0x7f675162f200), format('~N'))
   Call: (205) [$syspreds] format('~N')
   Unify: (205) [$syspreds] format('~N')
^  Call: (206) [$syspreds] format('~N', [])
^  Exit: (206) [$syspreds] format('~N', [])
   Exit: (205) [$syspreds] format('~N')
^  Exit: (203) [user] with_output_to((0x7f675162f200), format('~N'))
^  Exit: (202) [user] user_err(format('~N'))
^  Exit: (201) [user] if_t(once((is_mettalog;is_testing)), user_err(format('~N')))
^  Exit: (200) [user] not_compatio(format('~N'))
^  Exit: (199) [user] not_compat_io(format('~N'))
^  Exit: (198) [user] connlf
^  Call: (198) [user] format(';;~w~n', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"])
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
^  Exit: (198) [user] format(';;~w~n', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"])
^  Exit: (197) [user] write_comment(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Call: (197) [user] ignore((symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), symbolic_list_concat([_144112, _144118], 'MeTTaLog only: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), !, atom_string(_144118, _144138), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _144138, _3362)))
^  Unify: (197) [system] ignore(user:(symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), symbolic_list_concat([_144112, _144118], 'MeTTaLog only: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), !, atom_string(_144118, _144138), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _144138, _3362)))
^  Call: (199) [user] symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Unify: (199) [user] symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Call: (200) [system] atomic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Exit: (200) [system] atomic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Exit: (199) [user] symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Call: (199) [user] symbolic_list_concat([_144112, _144118], 'MeTTaLog only: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Unify: (199) [user] symbolic_list_concat([_144112, _144118], 'MeTTaLog only: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Call: (200) [system] atomic_list_concat([_144112, _144118], 'MeTTaLog only: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Fail: (200) [system] atomic_list_concat([_144112, _144118], 'MeTTaLog only: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Fail: (199) [user] symbolic_list_concat([_144112, _144118], 'MeTTaLog only: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (197) [system] ignore(user:(symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), symbolic_list_concat([_144112, _144118], 'MeTTaLog only: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), !, atom_string(_144118, _144138), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _144138, _3362)))
^  Unify: (197) [system] ignore(user:(symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), symbolic_list_concat([_144112, _144118], 'MeTTaLog only: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), !, atom_string(_144118, _144138), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _144138, _3362)))
^  Exit: (197) [system] ignore(user:(symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), symbolic_list_concat([_144112, _144118], 'MeTTaLog only: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), !, atom_string(_144118, _144138), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _144138, _3362)))
^  Call: (197) [user] ignore((symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), symbolic_list_concat([_177628, _144118], 'MeTTaLog: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), !, atom_string(_144118, _144138), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _144138, _3362)))
^  Unify: (197) [system] ignore(user:(symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), symbolic_list_concat([_177628, _144118], 'MeTTaLog: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), !, atom_string(_144118, _144138), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _144138, _3362)))
^  Call: (199) [user] symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Unify: (199) [user] symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Call: (200) [system] atomic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Exit: (200) [system] atomic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Exit: (199) [user] symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Call: (199) [user] symbolic_list_concat([_177628, _144118], 'MeTTaLog: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Unify: (199) [user] symbolic_list_concat([_177628, _144118], 'MeTTaLog: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Call: (200) [system] atomic_list_concat([_177628, _144118], 'MeTTaLog: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Fail: (200) [system] atomic_list_concat([_177628, _144118], 'MeTTaLog: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Fail: (199) [user] symbolic_list_concat([_177628, _144118], 'MeTTaLog: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (197) [system] ignore(user:(symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), symbolic_list_concat([_177628, _144118], 'MeTTaLog: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), !, atom_string(_144118, _144138), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _144138, _3362)))
^  Unify: (197) [system] ignore(user:(symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), symbolic_list_concat([_177628, _144118], 'MeTTaLog: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), !, atom_string(_144118, _144138), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _144138, _3362)))
^  Exit: (197) [system] ignore(user:(symbolic(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), symbolic_list_concat([_177628, _144118], 'MeTTaLog: ', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"), !, atom_string(_144118, _144138), do_metta(mettalog_only(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')), +, '&self', _144138, _3362)))
   Exit: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), comment(+), '&self', ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _3362)
   Exit: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 3, 0), _3362)
^  Exit: (194) [user] must_not_error(user:do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 3, 0), _3362))
^  Redo: (193) [user] metta_file_buffer(_3314, _3316, _3318, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _3322)
^  Unify: (193) [user] metta_file_buffer(+, exec(['include!', '&corelib', stdlib_minimal]), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '$stream_position'(0, 1, 0, 0))
^  Exit: (193) [user] metta_file_buffer(+, exec(['include!', '&corelib', stdlib_minimal]), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (194) [user] apply:maplist(maybe_assign, [])
^  Unify: (194) [apply] apply:maplist(user:maybe_assign, [])
   Call: (195) [apply] apply:maplist_([], user:maybe_assign)
   Unify: (195) [apply] apply:maplist_([], user:maybe_assign)
   Exit: (195) [apply] apply:maplist_([], user:maybe_assign)
^  Exit: (194) [apply] apply:maplist(user:maybe_assign, [])
^  Call: (194) [user] must_not_error(do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', exec(['include!', '&corelib', stdlib_minimal]), _3362))
^  Unify: (194) [user] must_not_error(user:do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', exec(['include!', '&corelib', stdlib_minimal]), _3362))
   Call: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', exec(['include!', '&corelib', stdlib_minimal]), _3362)
   Unify: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', exec(['include!', '&corelib', stdlib_minimal]), _3362)
   Call: (196) [system] var(exec(['include!', '&corelib', stdlib_minimal]))
   Redo: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', exec(['include!', '&corelib', stdlib_minimal]), _3362)
   Unify: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', exec(['include!', '&corelib', stdlib_minimal]), _3362)
   Call: (196) [system] (+)\==exec
   Exit: (196) [system] (+)\==exec
   Call: (196) [system] exec(['include!', '&corelib', stdlib_minimal])==[]
   Redo: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', exec(['include!', '&corelib', stdlib_minimal]), _3362)
   Unify: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', exec(['include!', '&corelib', stdlib_minimal]), _3362)
   Call: (196) [system] string(exec(['include!', '&corelib', stdlib_minimal]))
   Redo: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', exec(['include!', '&corelib', stdlib_minimal]), _3362)
   Unify: (195) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), +, '&self', exec(['include!', '&corelib', stdlib_minimal]), _3362)
   Call: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), exec, '&self', ['include!', '&corelib', stdlib_minimal], _3362)
   Unify: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), exec, '&self', ['include!', '&corelib', stdlib_minimal], _3362)
   Call: (197) [system] var(['include!', '&corelib', stdlib_minimal])
   Redo: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), exec, '&self', ['include!', '&corelib', stdlib_minimal], _3362)
   Unify: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), exec, '&self', ['include!', '&corelib', stdlib_minimal], _3362)
   Call: (197) [system] exec\==exec
   Redo: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), exec, '&self', ['include!', '&corelib', stdlib_minimal], _3362)
   Unify: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), exec, '&self', ['include!', '&corelib', stdlib_minimal], _3362)
   Call: (197) [system] string(['include!', '&corelib', stdlib_minimal])
   Redo: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), exec, '&self', ['include!', '&corelib', stdlib_minimal], _3362)
   Unify: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), exec, '&self', ['include!', '&corelib', stdlib_minimal], _3362)
   Call: (197) [system] exec\==exec
   Redo: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), exec, '&self', ['include!', '&corelib', stdlib_minimal], _3362)
   Unify: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), exec, '&self', ['include!', '&corelib', stdlib_minimal], _3362)
^  Call: (197) [user] must_det_ll(inc_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Unify: (197) [user] must_det_ll(user:inc_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Call: (198) [user] once(user:inc_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Unify: (198) [system] once(user:inc_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Call: (199) [user] inc_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
^  Unify: (199) [user] inc_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
^  Call: (200) [user] retract(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _379670))
^  Exit: (200) [user] retract(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 0))
   Call: (200) [system] _389342 is 0+1
   Exit: (200) [system] 1 is 0+1
^  Call: (200) [user] asserta(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1))
^  Exit: (200) [user] asserta(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1))
^  Exit: (199) [user] inc_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
^  Exit: (198) [system] once(user:inc_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Exit: (197) [user] must_det_ll(user:inc_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Call: (197) [user] must_det_ll(get_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _415358))
^  Unify: (197) [user] must_det_ll(user:get_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _415358))
^  Call: (198) [user] once(user:get_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _415358))
^  Unify: (198) [system] once(user:get_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _415358))
^  Call: (199) [user] get_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _415358)
^  Unify: (199) [user] get_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _415358)
^  Call: (200) [user] file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', _444342)
^  Unify: (200) [user] file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1)
^  Exit: (200) [user] file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1)
   Call: (200) [system] _415358=1
   Exit: (200) [system] 1=1
^  Exit: (199) [user] get_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1)
^  Exit: (198) [system] once(user:get_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1))
^  Exit: (197) [user] must_det_ll(user:get_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1))
^  Call: (197) [user] must_det_ll(1>0)
^  Unify: (197) [user] must_det_ll(user:(1>0))
^  Call: (198) [user] once(user:(1>0))
^  Unify: (198) [system] once(user:(1>0))
   Call: (199) [system] 1>0
   Exit: (199) [system] 1>0
^  Exit: (198) [system] once(user:(1>0))
^  Exit: (197) [user] must_det_ll(user:(1>0))
^  Call: (197) [user] is_synthing_unit_tests
^  Unify: (197) [user] is_synthing_unit_tests
^  Call: (199) [system] setup_call_cleanup('$notrace'(_484448, _484450), once(user:is_synthing_unit_tests0), '$restore_trace'(_484448, _484450))
^  Unify: (199) [system] setup_call_cleanup(system:'$notrace'(_484448, _484450), system:once(user:is_synthing_unit_tests0), system:'$restore_trace'(_484448, _484450))
^  Call: (200) [system] sig_atomic(system:'$notrace'(_484448, _484450))
^  Exit: (199) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:is_synthing_unit_tests0), system:'$restore_trace'(3, -1))
^  Exit: (197) [user] is_synthing_unit_tests
^  Call: (197) [user] file_answers(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1, _489186)
^  Unify: (197) [user] file_answers(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1, [['include!', '&corelib', stdlib_minimal]])
^  Exit: (197) [user] file_answers(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1, [['include!', '&corelib', stdlib_minimal]])
   Call: (197) [user] check_answers_for(['include!', '&corelib', stdlib_minimal], [['include!', '&corelib', stdlib_minimal]])
   Unify: (197) [user] check_answers_for(['include!', '&corelib', stdlib_minimal], [['include!', '&corelib', stdlib_minimal]])
   Call: (198) [system] nb_current(suspend_answers, true)
   Redo: (197) [user] check_answers_for(['include!', '&corelib', stdlib_minimal], [['include!', '&corelib', stdlib_minimal]])
   Unify: (197) [user] check_answers_for(['include!', '&corelib', stdlib_minimal], [['include!', '&corelib', stdlib_minimal]])
   Call: (198) [system] string(['include!', '&corelib', stdlib_minimal])
   Redo: (197) [user] check_answers_for(['include!', '&corelib', stdlib_minimal], [['include!', '&corelib', stdlib_minimal]])
   Call: (198) [system] var([['include!', '&corelib', stdlib_minimal]])
   Redo: (197) [user] check_answers_for(['include!', '&corelib', stdlib_minimal], [['include!', '&corelib', stdlib_minimal]])
   Call: (198) [system] var(['include!', '&corelib', stdlib_minimal])
   Redo: (197) [user] check_answers_for(['include!', '&corelib', stdlib_minimal], [['include!', '&corelib', stdlib_minimal]])
   Unify: (197) [user] check_answers_for(['include!', '&corelib', stdlib_minimal], [['include!', '&corelib', stdlib_minimal]])
^  Call: (198) [user] backward_compatibility:sformat(_514742, '~q', [['include!', '&corelib', stdlib_minimal]])
^  Unify: (198) [user] backward_compatibility:sformat(_514742, '~q', [['include!', '&corelib', stdlib_minimal]])
^  Call: (199) [user] format(string(_514742), '~q', [['include!', '&corelib', stdlib_minimal]])
^  Exit: (199) [user] format(string("['include!','&corelib',stdlib_minimal]"), '~q', [['include!', '&corelib', stdlib_minimal]])
^  Exit: (198) [user] backward_compatibility:sformat("['include!','&corelib',stdlib_minimal]", '~q', [['include!', '&corelib', stdlib_minimal]])
^  Call: (198) [user] atom_contains("['include!','&corelib',stdlib_minimal]", "[assert")
^  Unify: (198) [user] atom_contains("['include!','&corelib',stdlib_minimal]", "[assert")
   Call: (199) [system] sub_atom("['include!','&corelib',stdlib_minimal]", _521398, _521400, _521402, "[assert")
   Fail: (199) [system] sub_atom("['include!','&corelib',stdlib_minimal]", _522338, _522340, _522342, "[assert")
^  Fail: (198) [user] atom_contains("['include!','&corelib',stdlib_minimal]", "[assert")
   Redo: (197) [user] check_answers_for(['include!', '&corelib', stdlib_minimal], [['include!', '&corelib', stdlib_minimal]])
   Unify: (197) [user] check_answers_for(['include!', '&corelib', stdlib_minimal], [['include!', '&corelib', stdlib_minimal]])
   Call: (198) [occurs] occurs:contains_var('BadType', [['include!', '&corelib', stdlib_minimal]])
   Unify: (198) [occurs] occurs:contains_var('BadType', [['include!', '&corelib', stdlib_minimal]])
   Call: (199) [system] 'BadType'==[['include!', '&corelib', stdlib_minimal]]
   Fail: (199) [system] 'BadType'==[['include!', '&corelib', stdlib_minimal]]
   Redo: (198) [occurs] occurs:contains_var('BadType', [['include!', '&corelib', stdlib_minimal]])
   Unify: (198) [occurs] occurs:contains_var('BadType', [['include!', '&corelib', stdlib_minimal]])
   Call: (199) [system] compound([['include!', '&corelib', stdlib_minimal]])
   Exit: (199) [system] compound([['include!', '&corelib', stdlib_minimal]])
   Call: (199) [system] arg(_12796, [['include!', '&corelib', stdlib_minimal]], _12720)
   Exit: (199) [system] arg(1, [['include!', '&corelib', stdlib_minimal]], ['include!', '&corelib', stdlib_minimal])
   Call: (199) [occurs] occurs:contains_var('BadType', ['include!', '&corelib', stdlib_minimal])
   Unify: (199) [occurs] occurs:contains_var('BadType', ['include!', '&corelib', stdlib_minimal])
   Call: (200) [system] 'BadType'==['include!', '&corelib', stdlib_minimal]
   Fail: (200) [system] 'BadType'==['include!', '&corelib', stdlib_minimal]
   Redo: (199) [occurs] occurs:contains_var('BadType', ['include!', '&corelib', stdlib_minimal])
   Unify: (199) [occurs] occurs:contains_var('BadType', ['include!', '&corelib', stdlib_minimal])
   Call: (200) [system] compound(['include!', '&corelib', stdlib_minimal])
   Exit: (200) [system] compound(['include!', '&corelib', stdlib_minimal])
   Call: (200) [system] arg(_22078, ['include!', '&corelib', stdlib_minimal], _22002)
   Exit: (200) [system] arg(1, ['include!', '&corelib', stdlib_minimal], 'include!')
   Call: (200) [occurs] occurs:contains_var('BadType', 'include!')
   Unify: (200) [occurs] occurs:contains_var('BadType', 'include!')
   Call: (201) [system] 'BadType'=='include!'
   Fail: (201) [system] 'BadType'=='include!'
   Redo: (200) [occurs] occurs:contains_var('BadType', 'include!')
   Unify: (200) [occurs] occurs:contains_var('BadType', 'include!')
   Call: (201) [system] compound('include!')
   Fail: (201) [system] compound('include!')
   Fail: (200) [occurs] occurs:contains_var('BadType', 'include!')
   Redo: (200) [system] arg(_32286, ['include!', '&corelib', stdlib_minimal], _22002)
   Exit: (200) [system] arg(2, ['include!', '&corelib', stdlib_minimal], ['&corelib', stdlib_minimal])
   Call: (200) [occurs] occurs:contains_var('BadType', ['&corelib', stdlib_minimal])
   Unify: (200) [occurs] occurs:contains_var('BadType', ['&corelib', stdlib_minimal])
   Call: (201) [system] 'BadType'==['&corelib', stdlib_minimal]
   Fail: (201) [system] 'BadType'==['&corelib', stdlib_minimal]
   Redo: (200) [occurs] occurs:contains_var('BadType', ['&corelib', stdlib_minimal])
   Unify: (200) [occurs] occurs:contains_var('BadType', ['&corelib', stdlib_minimal])
   Call: (201) [system] compound(['&corelib', stdlib_minimal])
   Exit: (201) [system] compound(['&corelib', stdlib_minimal])
   Call: (201) [system] arg(_41568, ['&corelib', stdlib_minimal], _41492)
   Exit: (201) [system] arg(1, ['&corelib', stdlib_minimal], '&corelib')
   Call: (201) [occurs] occurs:contains_var('BadType', '&corelib')
   Unify: (201) [occurs] occurs:contains_var('BadType', '&corelib')
   Call: (202) [system] 'BadType'=='&corelib'
   Fail: (202) [system] 'BadType'=='&corelib'
   Redo: (201) [occurs] occurs:contains_var('BadType', '&corelib')
   Unify: (201) [occurs] occurs:contains_var('BadType', '&corelib')
   Call: (202) [system] compound('&corelib')
   Fail: (202) [system] compound('&corelib')
   Fail: (201) [occurs] occurs:contains_var('BadType', '&corelib')
   Redo: (201) [system] arg(_51776, ['&corelib', stdlib_minimal], _41492)
   Exit: (201) [system] arg(2, ['&corelib', stdlib_minimal], [stdlib_minimal])
   Call: (201) [occurs] occurs:contains_var('BadType', [stdlib_minimal])
   Unify: (201) [occurs] occurs:contains_var('BadType', [stdlib_minimal])
   Call: (202) [system] 'BadType'==[stdlib_minimal]
   Fail: (202) [system] 'BadType'==[stdlib_minimal]
   Redo: (201) [occurs] occurs:contains_var('BadType', [stdlib_minimal])
   Unify: (201) [occurs] occurs:contains_var('BadType', [stdlib_minimal])
   Call: (202) [system] compound([stdlib_minimal])
   Exit: (202) [system] compound([stdlib_minimal])
   Call: (202) [system] arg(_61058, [stdlib_minimal], _60982)
   Exit: (202) [system] arg(1, [stdlib_minimal], stdlib_minimal)
   Call: (202) [occurs] occurs:contains_var('BadType', stdlib_minimal)
   Unify: (202) [occurs] occurs:contains_var('BadType', stdlib_minimal)
   Call: (203) [system] 'BadType'==stdlib_minimal
   Fail: (203) [system] 'BadType'==stdlib_minimal
   Redo: (202) [occurs] occurs:contains_var('BadType', stdlib_minimal)
   Unify: (202) [occurs] occurs:contains_var('BadType', stdlib_minimal)
   Call: (203) [system] compound(stdlib_minimal)
   Fail: (203) [system] compound(stdlib_minimal)
   Fail: (202) [occurs] occurs:contains_var('BadType', stdlib_minimal)
   Redo: (202) [system] arg(_71266, [stdlib_minimal], _60982)
   Exit: (202) [system] arg(2, [stdlib_minimal], [])
   Call: (202) [occurs] occurs:contains_var('BadType', [])
   Unify: (202) [occurs] occurs:contains_var('BadType', [])
   Call: (203) [system] 'BadType'==[]
   Fail: (203) [system] 'BadType'==[]
   Redo: (202) [occurs] occurs:contains_var('BadType', [])
   Unify: (202) [occurs] occurs:contains_var('BadType', [])
   Call: (203) [system] compound([])
   Fail: (203) [system] compound([])
   Fail: (202) [occurs] occurs:contains_var('BadType', [])
   Fail: (201) [occurs] occurs:contains_var('BadType', [stdlib_minimal])
   Fail: (200) [occurs] occurs:contains_var('BadType', ['&corelib', stdlib_minimal])
   Fail: (199) [occurs] occurs:contains_var('BadType', ['include!', '&corelib', stdlib_minimal])
   Redo: (199) [system] arg(_84258, [['include!', '&corelib', stdlib_minimal]], _12720)
   Exit: (199) [system] arg(2, [['include!', '&corelib', stdlib_minimal]], [])
   Call: (199) [occurs] occurs:contains_var('BadType', [])
   Unify: (199) [occurs] occurs:contains_var('BadType', [])
   Call: (200) [system] 'BadType'==[]
   Fail: (200) [system] 'BadType'==[]
   Redo: (199) [occurs] occurs:contains_var('BadType', [])
   Unify: (199) [occurs] occurs:contains_var('BadType', [])
   Call: (200) [system] compound([])
   Fail: (200) [system] compound([])
   Fail: (199) [occurs] occurs:contains_var('BadType', [])
   Fail: (198) [occurs] occurs:contains_var('BadType', [['include!', '&corelib', stdlib_minimal]])
   Redo: (197) [user] check_answers_for(['include!', '&corelib', stdlib_minimal], [['include!', '&corelib', stdlib_minimal]])
   Unify: (197) [user] check_answers_for(['include!', '&corelib', stdlib_minimal], [['include!', '&corelib', stdlib_minimal]])
   Call: (198) [user] inside_assert(['include!', '&corelib', stdlib_minimal], _97152)
   Unify: (198) [user] inside_assert(['include!', '&corelib', stdlib_minimal], ['include!', '&corelib', stdlib_minimal])
   Call: (199) [system] compound(['include!', '&corelib', stdlib_minimal])
   Exit: (199) [system] compound(['include!', '&corelib', stdlib_minimal])
   Unify: (198) [user] inside_assert(['include!', '&corelib', stdlib_minimal], '&corelib')
^  Call: (199) [user] symbol('include!')
^  Unify: (199) [user] symbol('include!')
   Call: (200) [system] atom('include!')
   Exit: (200) [system] atom('include!')
^  Exit: (199) [user] symbol('include!')
^  Call: (199) [user] symbol_concat(assert, _106446, 'include!')
^  Unify: (199) [user] symbol_concat(assert, _107378, 'include!')
   Call: (200) [system] atom_concat(assert, _108234, 'include!')
   Fail: (200) [system] atom_concat(assert, _108234, 'include!')
^  Fail: (199) [user] symbol_concat(assert, _110176, 'include!')
   Redo: (198) [user] inside_assert(['include!', '&corelib', stdlib_minimal], _97152)
   Unify: (198) [user] inside_assert(['include!', '&corelib', stdlib_minimal], ['include!', '&corelib', stdlib_minimal])
   Call: (199) [user] is_conz(['include!', '&corelib', stdlib_minimal])
   Unify: (199) [user] is_conz(['include!', '&corelib', stdlib_minimal])
   Call: (200) [system] compound(['include!', '&corelib', stdlib_minimal])
   Exit: (200) [system] compound(['include!', '&corelib', stdlib_minimal])
   Call: (200) [system] ['include!', '&corelib', stdlib_minimal]=[_116538|_116540]
   Exit: (200) [system] ['include!', '&corelib', stdlib_minimal]=['include!', '&corelib', stdlib_minimal]
   Exit: (199) [user] is_conz(['include!', '&corelib', stdlib_minimal])
   Exit: (198) [user] inside_assert(['include!', '&corelib', stdlib_minimal], ['include!', '&corelib', stdlib_minimal])
   Call: (198) [user] always_exec(['include!', '&corelib', stdlib_minimal])
   Unify: (198) [user] always_exec(['include!', '&corelib', stdlib_minimal])
   Call: (199) [system] compound(['include!', '&corelib', stdlib_minimal])
   Exit: (199) [system] compound(['include!', '&corelib', stdlib_minimal])
   Call: (199) [system] compound_name_arity(['include!', '&corelib', stdlib_minimal], _123898, _123900)
   Exit: (199) [system] compound_name_arity(['include!', '&corelib', stdlib_minimal], '[|]', 2)
^  Call: (199) [user] symbol_concat(eval, _125842, '[|]')
^  Unify: (199) [user] symbol_concat(eval, _126774, '[|]')
   Call: (200) [system] atom_concat(eval, _127630, '[|]')
   Fail: (200) [system] atom_concat(eval, _127630, '[|]')
^  Fail: (199) [user] symbol_concat(eval, _129572, '[|]')
   Redo: (198) [user] always_exec(['include!', '&corelib', stdlib_minimal])
   Unify: (198) [user] always_exec(['include!', '&corelib', stdlib_minimal])
   Call: (199) [system] is_list(['include!', '&corelib', stdlib_minimal])
   Exit: (199) [system] is_list(['include!', '&corelib', stdlib_minimal])
   Unify: (198) [user] always_exec(['include!', '&corelib', stdlib_minimal])
^  Call: (199) [user] symbol('include!')
^  Unify: (199) [user] symbol('include!')
   Call: (200) [system] atom('include!')
   Exit: (200) [system] atom('include!')
^  Exit: (199) [user] symbol('include!')
   Unify: (198) [user] always_exec(['include!', '&corelib', stdlib_minimal])
^  Call: (199) [user] symbol_concat(_140618, !, 'include!')
^  Unify: (199) [user] symbol_concat(_141550, !, 'include!')
   Call: (200) [system] atom_concat(_142408, !, 'include!')
   Exit: (200) [system] atom_concat(include, !, 'include!')
^  Exit: (199) [user] symbol_concat(include, !, 'include!')
   Exit: (198) [user] always_exec(['include!', '&corelib', stdlib_minimal])
   Call: (198) [system] fail
   Redo: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), exec, '&self', ['include!', '&corelib', stdlib_minimal], _3362)
   Unify: (196) [user] do_metta(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), exec, '&self', ['include!', '&corelib', stdlib_minimal], _3362)
^  Call: (197) [user] if_t(into_simple_op(exec, ['include!', '&corelib', stdlib_minimal], _156700), pfcAdd_Now('next-operation'(_156700)))
^  Unify: (197) [user] if_t(into_simple_op(exec, ['include!', '&corelib', stdlib_minimal], _156700), pfcAdd_Now('next-operation'(_156700)))
   Call: (198) [user] into_simple_op(exec, ['include!', '&corelib', stdlib_minimal], _156700)
   Unify: (198) [user] into_simple_op(exec, ['include!', '&corelib', stdlib_minimal], op(exec, 'include!', _159492))
   Call: (199) [user] o_s(['&corelib', stdlib_minimal], _159492)
   Unify: (199) [user] o_s(['&corelib', stdlib_minimal], _159492)
   Call: (200) [user] o_s('&corelib', _159492)
   Unify: (200) [user] o_s('&corelib', '&corelib')
   Exit: (200) [user] o_s('&corelib', '&corelib')
   Exit: (199) [user] o_s(['&corelib', stdlib_minimal], '&corelib')
   Exit: (198) [user] into_simple_op(exec, ['include!', '&corelib', stdlib_minimal], op(exec, 'include!', '&corelib'))
^  Call: (198) [user] pfcAdd_Now('next-operation'(op(exec, 'include!', '&corelib')))
^  Unify: (198) [user] pfcAdd_Now('next-operation'(op(exec, 'include!', '&corelib')))
^  Call: (199) [user] current_predicate(pfcAdd/1)
^  Exit: (199) [user] current_predicate(pfcAdd/1)
^  Call: (199) [user] once_writeq_nl(pfcAdd('next-operation'(op(exec, 'include!', '&corelib'))))
^  Unify: (199) [user] once_writeq_nl(pfcAdd('next-operation'(op(exec, 'include!', '&corelib'))))
^  Call: (200) [user] clause(pfcTraceExecution, true)
^  Fail: (200) [user] clause(pfcTraceExecution, true)
^  Redo: (199) [user] once_writeq_nl(pfcAdd('next-operation'(op(exec, 'include!', '&corelib'))))
^  Exit: (199) [user] once_writeq_nl(pfcAdd('next-operation'(op(exec, 'include!', '&corelib'))))
^  Call: (199) [user] pfcAdd('next-operation'(op(exec, 'include!', '&corelib')))
^  Unify: (199) [user] pfcAdd('next-operation'(op(exec, 'include!', '&corelib')))
^  Call: (200) [user] must_ex(current_why_UU(_177962))
^  Unify: (200) [user] must_ex(current_why_UU(_177962))
   Call: (202) [user] current_why_UU(_177962)
   Unify: (202) [user] current_why_UU(_177962)
^  Call: (203) [user] get_why_uu(_177962)
^  Unify: (203) [user] get_why_uu(_177962)
^  Call: (204) [user] findall(_183502, current_why(_183502), _183508)
^  Unify: (204) [$bags] findall(_183502, user:current_why(_183502), _183508)
^  Call: (205) [$bags] findall(_183502, user:current_why(_183502), _183508, [])
^  Unify: (205) [$bags] findall(_183502, user:current_why(_183502), _183508, [])
^  Call: (206) [$bags] cleanup_bag(findall_loop(_183502, user:current_why(_183502), _183508, []), '$destroy_findall_bag')
^  Unify: (206) [$bags] cleanup_bag('$bags':findall_loop(_183502, user:current_why(_183502), _183508, []), '$bags':'$destroy_findall_bag')
   Call: (207) [$bags] findall_loop(_183502, user:current_why(_183502), _183508, [])
   Unify: (207) [$bags] findall_loop(_183502, user:current_why(_183502), _183508, [])
^  Call: (208) [user] bugger:current_why(_183502)
^  Unify: (208) [user] bugger:current_why(_183502)
^  Call: (209) [user] bugger:current_why_data(_183502)
^  Unify: (209) [user] bugger:current_why_data(_183502)
   Call: (210) [system] nb_current('$current_why', wp(_183502, _194762))
   Fail: (210) [system] nb_current('$current_why', wp(_183502, _194762))
^  Redo: (209) [user] bugger:current_why_data(_183502)
^  Unify: (209) [user] bugger:current_why_data(_183502)
   Call: (210) [t_l] t_l:current_why_source(_183502)
   Fail: (210) [t_l] t_l:current_why_source(_183502)
^  Fail: (209) [user] bugger:current_why_data(_183502)
^  Redo: (208) [user] bugger:current_why(_183502)
^  Unify: (208) [user] bugger:current_why(mfl4(_202190, _202192, _202194, _202196))
^  Call: (210) [system] setup_call_cleanup('$notrace'(_203146, _203148), once(user:current_mfl4(_202190, _202192, _202194, _202196)), '$restore_trace'(_203146, _203148))
^  Unify: (210) [system] setup_call_cleanup(system:'$notrace'(_203146, _203148), system:once(user:current_mfl4(_202190, _202192, _202194, _202196)), system:'$restore_trace'(_203146, _203148))
^  Call: (211) [system] sig_atomic(system:'$notrace'(_203146, _203148))
^  Exit: (210) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:current_mfl4(_202190, user, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1805)), system:'$restore_trace'(3, -1))
^  Exit: (208) [user] bugger:current_why(P;HTML|mfl4(_202190, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Redo: (207) [$bags] findall_loop(_183502, user:current_why(_183502), _183508, [])
   Exit: (207) [$bags] findall_loop(_183502, user:current_why(_183502), [P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], [])
^  Exit: (206) [$bags] cleanup_bag('$bags':findall_loop(_183502, user:current_why(_183502), [P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], []), '$bags':'$destroy_findall_bag')
^  Exit: (205) [$bags] findall(_183502, user:current_why(_183502), [P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], [])
^  Exit: (204) [$bags] findall(_183502, user:current_why(_183502), [P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Call: (204) [system] [P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]\==[]
   Exit: (204) [system] [P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]\==[]
^  Call: (204) [user] u_to_uu([P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _177962)
^  Unify: (204) [user] u_to_uu([P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], ([P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], ax))
   Call: (205) [system] var([P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Fail: (205) [system] var([P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
^  Redo: (204) [user] u_to_uu([P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _177962)
^  Unify: (204) [user] u_to_uu([P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], [P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Call: (205) [system] nonvar([P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Exit: (205) [system] nonvar([P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Call: (205) [system] [P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]=(_339914, _339916)
   Fail: (205) [system] [P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]=(_339914, _339916)
^  Redo: (204) [user] u_to_uu([P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _177962)
^  Unify: (204) [user] u_to_uu([P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _177962)
^  Call: (205) [user] logicmoo_util_terms:list_to_conjuncts([P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _370348)
^  Unify: (205) [user] logicmoo_util_terms:list_to_conjuncts([P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _370348)
^  Call: (206) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _370348)
^  Unify: (206) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], [P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Call: (207) [system] var([P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Fail: (207) [system] var([P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
^  Redo: (206) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _370348)
^  Unify: (206) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], [P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
^  Call: (207) [user] not(compound([P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]))
^  Unify: (207) [system] not(user:compound([P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]))
   Call: (208) [system] compound([P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Exit: (208) [system] compound([P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
^  Fail: (207) [system] not(user:compound([P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]))
^  Redo: (206) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _370348)
^  Unify: (206) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _370348)
^  Call: (207) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _370348)
^  Unify: (207) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Call: (208) [system] var(P;HTML|mfl4(_220030, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Fail: (208) [system] var(P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Redo: (207) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _3522)
^  Unify: (207) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Call: (208) [user] not(compound(P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)))
^  Unify: (208) [system] not(user:compound(P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)))
   Call: (209) [system] compound(P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Exit: (209) [system] compound(P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Fail: (208) [system] not(user:compound(P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)))
^  Redo: (207) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _3522)
^  Unify: (207) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Exit: (207) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Exit: (206) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Exit: (205) [user] logicmoo_util_terms:list_to_conjuncts([P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Call: (205) [user] u_to_uu(P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _3476)
^  Unify: (205) [user] u_to_uu(P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
   Call: (206) [system] var(P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Fail: (206) [system] var(P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Redo: (205) [user] u_to_uu(P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _3476)
^  Unify: (205) [user] u_to_uu(P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Call: (206) [system] nonvar(P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Exit: (206) [system] nonvar(P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Call: (206) [system] P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)=(_214674, _214676)
   Fail: (206) [system] P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)=(_214674, _214676)
^  Redo: (205) [user] u_to_uu(P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _3476)
^  Unify: (205) [user] u_to_uu(P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (205) [user] u_to_uu(P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (204) [user] u_to_uu([P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (203) [user] get_why_uu((P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
   Exit: (202) [user] current_why_UU((P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (200) [user] must_ex(current_why_UU((P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Call: (200) [user] pfcAdd('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (200) [user] pfcAdd('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (201) [user] pfcPost('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (201) [user] pfcPost('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (202) [user] pfcPost_rev((P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax), 'next-operation'(op(exec, 'include!', '&corelib')))
^  Unify: (202) [user] pfcPost_rev((P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax), 'next-operation'(op(exec, 'include!', '&corelib')))
   Call: (203) [system] is_list('next-operation'(op(exec, 'include!', '&corelib')))
   Fail: (203) [system] is_list('next-operation'(op(exec, 'include!', '&corelib')))
^  Redo: (202) [user] pfcPost_rev((P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax), 'next-operation'(op(exec, 'include!', '&corelib')))
^  Call: (203) [user] pfcPost1('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (203) [user] pfcPost1('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (204) [user] control_arg_types('next-operation'(op(exec, 'include!', '&corelib')), _373408)
^  Unify: (204) [user] control_arg_types('next-operation'(op(exec, 'include!', '&corelib')), _373408)
   Call: (205) [system] fail
   Fail: (205) [system] fail
^  Fail: (204) [user] control_arg_types('next-operation'(op(exec, 'include!', '&corelib')), _373408)
^  Redo: (203) [user] pfcPost1('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (203) [user] pfcPost1('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (204) [user] locally_each:locally(set_prolog_flag(occurs_check, true), catch(pfcPost11('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _393244, (notrace, wdmsg(('next-operation'(op(exec, 'include!', '&corelib'))=>_393244)), trace)))
^  Unify: (204) [locally_each] locally_each:locally(user:set_prolog_flag(occurs_check, true), user:catch(pfcPost11('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _393244, (notrace, wdmsg(('next-operation'(op(exec, 'include!', '&corelib'))=>_393244)), trace)))
^  Call: (205) [locally_each] locally_each:wtl(user, set_prolog_flag(occurs_check, true), user:catch(pfcPost11('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _393244, (notrace, wdmsg(('next-operation'(op(exec, 'include!', '&corelib'))=>_393244)), trace)), user:each_call_cleanup)
^  Unify: (205) [locally_each] locally_each:wtl(user, set_prolog_flag(occurs_check, true), user:catch(pfcPost11('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _393244, (notrace, wdmsg(('next-operation'(op(exec, 'include!', '&corelib'))=>_393244)), trace)), user:each_call_cleanup)
   Call: (206) [system] current_prolog_flag(occurs_check, _423766)
   Exit: (206) [system] current_prolog_flag(occurs_check, true)
^  Call: (206) [locally_each] locally_each:wtl_how(trusted_redo_call_cleanup, true==true, user:set_prolog_flag(occurs_check, true), user:catch(pfcPost11('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _393244, (notrace, wdmsg(('next-operation'(op(exec, 'include!', '&corelib'))=>_393244)), trace)), user:set_prolog_flag(occurs_check, true))
^  Unify: (206) [locally_each] locally_each:wtl_how(locally_each:trusted_redo_call_cleanup, locally_each:(true==true), user:set_prolog_flag(occurs_check, true), user:catch(pfcPost11('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _393244, (notrace, wdmsg(('next-operation'(op(exec, 'include!', '&corelib'))=>_393244)), trace)), user:set_prolog_flag(occurs_check, true))
   Call: (207) [system] true==true
   Exit: (207) [system] true==true
^  Call: (208) [user] pfcPost11('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (208) [user] pfcPost11('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (209) [user] must_ex(pfcAddSupport('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Unify: (209) [user] must_ex(pfcAddSupport('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Call: (211) [user] pfcAddSupport('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (211) [user] pfcAddSupport('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (212) [user] assert('$spft$'('next-operation'(op(exec, 'include!', '&corelib')), P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (212) [user] assert('$spft$'('next-operation'(op(exec, 'include!', '&corelib')), P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (211) [user] pfcAddSupport('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (209) [user] must_ex(pfcAddSupport('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3502, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Call: (209) [user] pfcUnique(post, 'next-operation'(op(exec, 'include!', '&corelib')))
^  Unify: (209) [user] pfcUnique(post, 'next-operation'(op(exec, 'include!', '&corelib')))
^  Call: (210) [user] pfcUnique(post, 'next-operation'(op(exec, 'include!', '&corelib')), true)
^  Unify: (210) [user] pfcUnique(post, 'next-operation'(op(exec, 'include!', '&corelib')), true)
^  Call: (211) [user] is_asserted_exact('next-operation'(op(exec, 'include!', '&corelib')), true)
^  Unify: (211) [user] is_asserted_exact('next-operation'(op(exec, 'include!', '&corelib')), true)
^  Call: (212) [user] strip_module('next-operation'(op(exec, 'include!', '&corelib')), _4142, _4144)
^  Exit: (212) [user] strip_module('next-operation'(op(exec, 'include!', '&corelib')), user, 'next-operation'(op(exec, 'include!', '&corelib')))
^  Call: (212) [user] is_asserted_exact(user, 'next-operation'(op(exec, 'include!', '&corelib')), true)
^  Unify: (212) [user] is_asserted_exact(user, 'next-operation'(op(exec, 'include!', '&corelib')), true)
   Call: (213) [system] _7886=user
   Exit: (213) [system] user=user
^  Call: (213) [user] clause(user:'next-operation'(op(exec, 'include!', '&corelib')), true, _9756)
^  Fail: (213) [user] clause('next-operation'(op(exec, 'include!', '&corelib')), true, _9756)
^  Redo: (212) [user] is_asserted_exact(user, 'next-operation'(op(exec, 'include!', '&corelib')), true)
^  Call: (213) [user] clause(user:'next-operation'(op(exec, 'include!', '&corelib')), true, _12584)
^  Fail: (213) [user] clause('next-operation'(op(exec, 'include!', '&corelib')), true, _12584)
^  Fail: (212) [user] is_asserted_exact(user, 'next-operation'(op(exec, 'include!', '&corelib')), true)
^  Fail: (211) [user] is_asserted_exact('next-operation'(op(exec, 'include!', '&corelib')), true)
^  Redo: (210) [user] pfcUnique(post, 'next-operation'(op(exec, 'include!', '&corelib')), true)
^  Exit: (210) [user] pfcUnique(post, 'next-operation'(op(exec, 'include!', '&corelib')), true)
^  Exit: (209) [user] pfcUnique(post, 'next-operation'(op(exec, 'include!', '&corelib')))
^  Call: (209) [user] pfcPost2('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (209) [user] pfcPost2('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (210) [user] must_ex(once((\+ \+is_asserted_exact('next-operation'(op(exec, 'include!', '&corelib')));assert('next-operation'(op(exec, 'include!', '&corelib'))))))
^  Unify: (210) [user] must_ex(once((\+ \+is_asserted_exact('next-operation'(op(exec, 'include!', '&corelib')));assert('next-operation'(op(exec, 'include!', '&corelib'))))))
^  Call: (212) [user] once((\+ \+is_asserted_exact('next-operation'(op(exec, 'include!', '&corelib')));assert('next-operation'(op(exec, 'include!', '&corelib')))))
^  Unify: (212) [system] once(user:(\+ \+is_asserted_exact('next-operation'(op(exec, 'include!', '&corelib')));assert('next-operation'(op(exec, 'include!', '&corelib')))))
^  Call: (214) [user] is_asserted_exact('next-operation'(op(exec, 'include!', '&corelib')))
^  Unify: (214) [user] is_asserted_exact('next-operation'(op(exec, 'include!', '&corelib')))
^  Call: (215) [user] strip_module('next-operation'(op(exec, 'include!', '&corelib')), _39934, _39936)
^  Exit: (215) [user] strip_module('next-operation'(op(exec, 'include!', '&corelib')), user, 'next-operation'(op(exec, 'include!', '&corelib')))
^  Call: (215) [user] hook_database:expand_to_hb('next-operation'(op(exec, 'include!', '&corelib')), _41814, _41816)
^  Unify: (215) [user] hook_database:expand_to_hb('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation'(op(exec, 'include!', '&corelib')), true)
   Call: (216) [system] var('next-operation'(op(exec, 'include!', '&corelib')))
   Fail: (216) [system] var('next-operation'(op(exec, 'include!', '&corelib')))
^  Redo: (215) [user] hook_database:expand_to_hb('next-operation'(op(exec, 'include!', '&corelib')), _41814, _41816)
^  Unify: (215) [user] hook_database:expand_to_hb('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation'(op(exec, 'include!', '&corelib')), true)
^  Exit: (215) [user] hook_database:expand_to_hb('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation'(op(exec, 'include!', '&corelib')), true)
^  Call: (215) [user] is_asserted_exact(user, 'next-operation'(op(exec, 'include!', '&corelib')), true)
^  Unify: (215) [user] is_asserted_exact(user, 'next-operation'(op(exec, 'include!', '&corelib')), true)
   Call: (216) [system] _50220=user
   Exit: (216) [system] user=user
^  Call: (216) [user] clause(user:'next-operation'(op(exec, 'include!', '&corelib')), true, _52090)
^  Fail: (216) [user] clause('next-operation'(op(exec, 'include!', '&corelib')), true, _52090)
^  Redo: (215) [user] is_asserted_exact(user, 'next-operation'(op(exec, 'include!', '&corelib')), true)
^  Call: (216) [user] clause(user:'next-operation'(op(exec, 'include!', '&corelib')), true, _54918)
^  Fail: (216) [user] clause('next-operation'(op(exec, 'include!', '&corelib')), true, _54918)
^  Fail: (215) [user] is_asserted_exact(user, 'next-operation'(op(exec, 'include!', '&corelib')), true)
^  Fail: (214) [user] is_asserted_exact('next-operation'(op(exec, 'include!', '&corelib')))
^  Call: (214) [user] assert('next-operation'(op(exec, 'include!', '&corelib')))
^  Exit: (214) [user] assert('next-operation'(op(exec, 'include!', '&corelib')))
^  Exit: (212) [system] once(user:(\+ \+is_asserted_exact('next-operation'(op(exec, 'include!', '&corelib')));assert('next-operation'(op(exec, 'include!', '&corelib')))))
^  Exit: (210) [user] must_ex(once((\+ \+is_asserted_exact('next-operation'(op(exec, 'include!', '&corelib')));assert('next-operation'(op(exec, 'include!', '&corelib'))))))
^  Call: (210) [user] must_ex(pfcTraceAdd('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Unify: (210) [user] must_ex(pfcTraceAdd('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Call: (212) [user] pfcTraceAdd('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (212) [user] pfcTraceAdd('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (213) [user] pfcTraceAddPrint('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (213) [user] pfcTraceAddPrint('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (214) [user] pfcIsTraced('next-operation'(op(exec, 'include!', '&corelib')))
^  Unify: (214) [user] pfcIsTraced('next-operation'(op(exec, 'include!', '&corelib')))
^  Call: (215) [user] pfcIsNotTraced('next-operation'(op(exec, 'include!', '&corelib')))
^  Unify: (215) [user] pfcIsNotTraced('next-operation'(op(exec, 'include!', '&corelib')))
^  Call: (216) [user] compound_eles(1, 'next-operation'(op(exec, 'include!', '&corelib')), _111708)
^  Unify: (216) [user] compound_eles(1, 'next-operation'(op(exec, 'include!', '&corelib')), _111708)
   Call: (217) [system] var('next-operation'(op(exec, 'include!', '&corelib')))
   Fail: (217) [system] var('next-operation'(op(exec, 'include!', '&corelib')))
^  Redo: (216) [user] compound_eles(1, 'next-operation'(op(exec, 'include!', '&corelib')), _111708)
^  Unify: (216) [user] compound_eles(1, 'next-operation'(op(exec, 'include!', '&corelib')), _111708)
   Call: (217) [system] compound('next-operation'(op(exec, 'include!', '&corelib')))
   Exit: (217) [system] compound('next-operation'(op(exec, 'include!', '&corelib')))
   Call: (217) [system] 1<1
   Fail: (217) [system] 1<1
^  Redo: (216) [user] compound_eles(1, 'next-operation'(op(exec, 'include!', '&corelib')), _111708)
^  Unify: (216) [user] compound_eles(1, 'next-operation'(op(exec, 'include!', '&corelib')), _111708)
   Call: (217) [system] _122860 is 1+ -1
   Exit: (217) [system] 0 is 1+ -1
^  Call: (217) [user] compound_eles('next-operation'(op(exec, 'include!', '&corelib')), _124718)
^  Unify: (217) [user] compound_eles('next-operation'(op(exec, 'include!', '&corelib')), _124718)
   Call: (218) [system] is_list('next-operation'(op(exec, 'include!', '&corelib')))
   Fail: (218) [system] is_list('next-operation'(op(exec, 'include!', '&corelib')))
^  Redo: (217) [user] compound_eles('next-operation'(op(exec, 'include!', '&corelib')), _124718)
^  Unify: (217) [user] compound_eles('next-operation'(op(exec, 'include!', '&corelib')), _124718)
   Call: (218) [system] compound('next-operation'(op(exec, 'include!', '&corelib')))
   Exit: (218) [system] compound('next-operation'(op(exec, 'include!', '&corelib')))
   Call: (218) [system] compound_name_arguments('next-operation'(op(exec, 'include!', '&corelib')), _132128, _132130)
   Exit: (218) [system] compound_name_arguments('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation', [op(exec, 'include!', '&corelib')])
   Call: (218) [lists] lists:member(_124718, ['next-operation', op(exec, 'include!', '&corelib')])
   Unify: (218) [lists] lists:member(_124718, ['next-operation', op(exec, 'include!', '&corelib')])
   Call: (219) [lists] lists:member_([op(exec, 'include!', '&corelib')], _124718, 'next-operation')
   Unify: (219) [lists] lists:member_([op(exec, 'include!', '&corelib')], 'next-operation', 'next-operation')
   Exit: (219) [lists] lists:member_([op(exec, 'include!', '&corelib')], 'next-operation', 'next-operation')
   Exit: (218) [lists] lists:member('next-operation', ['next-operation', op(exec, 'include!', '&corelib')])
^  Exit: (217) [user] compound_eles('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation')
^  Call: (217) [user] compound_eles(0, 'next-operation', _111708)
^  Unify: (217) [user] compound_eles(0, 'next-operation', _111708)
   Call: (218) [system] var('next-operation')
   Fail: (218) [system] var('next-operation')
^  Redo: (217) [user] compound_eles(0, 'next-operation', _111708)
^  Unify: (217) [user] compound_eles(0, 'next-operation', _111708)
   Call: (218) [system] compound('next-operation')
   Fail: (218) [system] compound('next-operation')
^  Redo: (217) [user] compound_eles(0, 'next-operation', _111708)
   Call: (218) [system] _111708='next-operation'
   Exit: (218) [system] 'next-operation'='next-operation'
^  Exit: (217) [user] compound_eles(0, 'next-operation', 'next-operation')
^  Exit: (216) [user] compound_eles(1, 'next-operation'(op(exec, 'include!', '&corelib')), 'next-operation')
^  Call: (216) [user] pfcIgnored('next-operation')
^  Fail: (216) [user] pfcIgnored('next-operation')
   Redo: (219) [lists] lists:member_([op(exec, 'include!', '&corelib')], _124718, 'next-operation')
   Unify: (219) [lists] lists:member_([op(exec, 'include!', '&corelib')], _124718, 'next-operation')
   Call: (220) [lists] lists:member_([], _124718, op(exec, 'include!', '&corelib'))
   Unify: (220) [lists] lists:member_([], op(exec, 'include!', '&corelib'), op(exec, 'include!', '&corelib'))
   Exit: (220) [lists] lists:member_([], op(exec, 'include!', '&corelib'), op(exec, 'include!', '&corelib'))
   Exit: (219) [lists] lists:member_([op(exec, 'include!', '&corelib')], op(exec, 'include!', '&corelib'), 'next-operation')
   Exit: (218) [lists] lists:member(op(exec, 'include!', '&corelib'), ['next-operation', op(exec, 'include!', '&corelib')])
^  Exit: (217) [user] compound_eles('next-operation'(op(exec, 'include!', '&corelib')), op(exec, 'include!', '&corelib'))
^  Call: (217) [user] compound_eles(0, op(exec, 'include!', '&corelib'), _111708)
^  Unify: (217) [user] compound_eles(0, op(exec, 'include!', '&corelib'), _111708)
   Call: (218) [system] var(op(exec, 'include!', '&corelib'))
   Fail: (218) [system] var(op(exec, 'include!', '&corelib'))
^  Redo: (217) [user] compound_eles(0, op(exec, 'include!', '&corelib'), _111708)
^  Unify: (217) [user] compound_eles(0, op(exec, 'include!', '&corelib'), _111708)
   Call: (218) [system] compound(op(exec, 'include!', '&corelib'))
   Exit: (218) [system] compound(op(exec, 'include!', '&corelib'))
   Call: (218) [system] 0<1
   Exit: (218) [system] 0<1
   Call: (218) [system] _111708=op(exec, 'include!', '&corelib')
   Exit: (218) [system] op(exec, 'include!', '&corelib')=op(exec, 'include!', '&corelib')
^  Exit: (217) [user] compound_eles(0, op(exec, 'include!', '&corelib'), op(exec, 'include!', '&corelib'))
^  Exit: (216) [user] compound_eles(1, 'next-operation'(op(exec, 'include!', '&corelib')), op(exec, 'include!', '&corelib'))
^  Call: (216) [user] pfcIgnored(op(exec, 'include!', '&corelib'))
^  Fail: (216) [user] pfcIgnored(op(exec, 'include!', '&corelib'))
^  Fail: (215) [user] pfcIsNotTraced('next-operation'(op(exec, 'include!', '&corelib')))
^  Redo: (214) [user] pfcIsTraced('next-operation'(op(exec, 'include!', '&corelib')))
^  Unify: (214) [user] pfcIsTraced('next-operation'(op(exec, 'include!', '&corelib')))
^  Call: (215) [user] compound_eles(1, 'next-operation'(op(exec, 'include!', '&corelib')), _179508)
^  Unify: (215) [user] compound_eles(1, 'next-operation'(op(exec, 'include!', '&corelib')), _179508)
   Call: (216) [system] var('next-operation'(op(exec, 'include!', '&corelib')))
   Fail: (216) [system] var('next-operation'(op(exec, 'include!', '&corelib')))
^  Redo: (215) [user] compound_eles(1, 'next-operation'(op(exec, 'include!', '&corelib')), _179508)
^  Unify: (215) [user] compound_eles(1, 'next-operation'(op(exec, 'include!', '&corelib')), _179508)
   Call: (216) [system] compound('next-operation'(op(exec, 'include!', '&corelib')))
   Exit: (216) [system] compound('next-operation'(op(exec, 'include!', '&corelib')))
   Call: (216) [system] 1<1
   Fail: (216) [system] 1<1
^  Redo: (215) [user] compound_eles(1, 'next-operation'(op(exec, 'include!', '&corelib')), _179508)
^  Unify: (215) [user] compound_eles(1, 'next-operation'(op(exec, 'include!', '&corelib')), _179508)
   Call: (216) [system] _190660 is 1+ -1
   Exit: (216) [system] 0 is 1+ -1
^  Call: (216) [user] compound_eles('next-operation'(op(exec, 'include!', '&corelib')), _192518)
^  Unify: (216) [user] compound_eles('next-operation'(op(exec, 'include!', '&corelib')), _192518)
   Call: (217) [system] is_list('next-operation'(op(exec, 'include!', '&corelib')))
   Fail: (217) [system] is_list('next-operation'(op(exec, 'include!', '&corelib')))
^  Redo: (216) [user] compound_eles('next-operation'(op(exec, 'include!', '&corelib')), _192518)
^  Unify: (216) [user] compound_eles('next-operation'(op(exec, 'include!', '&corelib')), _192518)
   Call: (217) [system] compound('next-operation'(op(exec, 'include!', '&corelib')))
   Exit: (217) [system] compound('next-operation'(op(exec, 'include!', '&corelib')))
   Call: (217) [system] compound_name_arguments('next-operation'(op(exec, 'include!', '&corelib')), _199928, _199930)
   Exit: (217) [system] compound_name_arguments('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation', [op(exec, 'include!', '&corelib')])
   Call: (217) [lists] lists:member(_192518, ['next-operation', op(exec, 'include!', '&corelib')])
   Unify: (217) [lists] lists:member(_192518, ['next-operation', op(exec, 'include!', '&corelib')])
   Call: (218) [lists] lists:member_([op(exec, 'include!', '&corelib')], _192518, 'next-operation')
   Unify: (218) [lists] lists:member_([op(exec, 'include!', '&corelib')], 'next-operation', 'next-operation')
   Exit: (218) [lists] lists:member_([op(exec, 'include!', '&corelib')], 'next-operation', 'next-operation')
   Exit: (217) [lists] lists:member('next-operation', ['next-operation', op(exec, 'include!', '&corelib')])
^  Exit: (216) [user] compound_eles('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation')
^  Call: (216) [user] compound_eles(0, 'next-operation', _179508)
^  Unify: (216) [user] compound_eles(0, 'next-operation', _179508)
   Call: (217) [system] var('next-operation')
   Fail: (217) [system] var('next-operation')
^  Redo: (216) [user] compound_eles(0, 'next-operation', _179508)
^  Unify: (216) [user] compound_eles(0, 'next-operation', _179508)
   Call: (217) [system] compound('next-operation')
   Fail: (217) [system] compound('next-operation')
^  Redo: (216) [user] compound_eles(0, 'next-operation', _179508)
   Call: (217) [system] _179508='next-operation'
   Exit: (217) [system] 'next-operation'='next-operation'
^  Exit: (216) [user] compound_eles(0, 'next-operation', 'next-operation')
^  Exit: (215) [user] compound_eles(1, 'next-operation'(op(exec, 'include!', '&corelib')), 'next-operation')
^  Call: (215) [user] pfcTraced('next-operation')
^  Fail: (215) [user] pfcTraced('next-operation')
   Redo: (218) [lists] lists:member_([op(exec, 'include!', '&corelib')], _192518, 'next-operation')
   Unify: (218) [lists] lists:member_([op(exec, 'include!', '&corelib')], _192518, 'next-operation')
   Call: (219) [lists] lists:member_([], _192518, op(exec, 'include!', '&corelib'))
   Unify: (219) [lists] lists:member_([], op(exec, 'include!', '&corelib'), op(exec, 'include!', '&corelib'))
   Exit: (219) [lists] lists:member_([], op(exec, 'include!', '&corelib'), op(exec, 'include!', '&corelib'))
   Exit: (218) [lists] lists:member_([op(exec, 'include!', '&corelib')], op(exec, 'include!', '&corelib'), 'next-operation')
   Exit: (217) [lists] lists:member(op(exec, 'include!', '&corelib'), ['next-operation', op(exec, 'include!', '&corelib')])
^  Exit: (216) [user] compound_eles('next-operation'(op(exec, 'include!', '&corelib')), op(exec, 'include!', '&corelib'))
^  Call: (216) [user] compound_eles(0, op(exec, 'include!', '&corelib'), _179508)
^  Unify: (216) [user] compound_eles(0, op(exec, 'include!', '&corelib'), _179508)
   Call: (217) [system] var(op(exec, 'include!', '&corelib'))
   Fail: (217) [system] var(op(exec, 'include!', '&corelib'))
^  Redo: (216) [user] compound_eles(0, op(exec, 'include!', '&corelib'), _179508)
^  Unify: (216) [user] compound_eles(0, op(exec, 'include!', '&corelib'), _179508)
   Call: (217) [system] compound(op(exec, 'include!', '&corelib'))
   Exit: (217) [system] compound(op(exec, 'include!', '&corelib'))
   Call: (217) [system] 0<1
   Exit: (217) [system] 0<1
   Call: (217) [system] _179508=op(exec, 'include!', '&corelib')
   Exit: (217) [system] op(exec, 'include!', '&corelib')=op(exec, 'include!', '&corelib')
^  Exit: (216) [user] compound_eles(0, op(exec, 'include!', '&corelib'), op(exec, 'include!', '&corelib'))
^  Exit: (215) [user] compound_eles(1, 'next-operation'(op(exec, 'include!', '&corelib')), op(exec, 'include!', '&corelib'))
^  Call: (215) [user] pfcTraced(op(exec, 'include!', '&corelib'))
^  Fail: (215) [user] pfcTraced(op(exec, 'include!', '&corelib'))
^  Fail: (214) [user] pfcIsTraced('next-operation'(op(exec, 'include!', '&corelib')))
^  Redo: (213) [user] pfcTraceAddPrint('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (213) [user] pfcTraceAddPrint('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (213) [user] pfcTraceAddPrint('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (213) [user] pfcTraceBreak('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (213) [user] pfcTraceBreak('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (214) [user] pfcSpied('next-operation'(op(exec, 'include!', '&corelib')), +)
^  Fail: (214) [user] pfcSpied('next-operation'(op(exec, 'include!', '&corelib')), +)
^  Redo: (213) [user] pfcTraceBreak('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (213) [user] pfcTraceBreak('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (212) [user] pfcTraceAdd('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (210) [user] must_ex(pfcTraceAdd('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Call: (210) [user] must_ex(pfcEnqueue('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Unify: (210) [user] must_ex(pfcEnqueue('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Call: (212) [user] pfcEnqueue('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (212) [user] pfcEnqueue('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (213) [user] pfcGetSearch(_346180)
^  Unify: (213) [user] pfcGetSearch(_346180)
   Call: (214) [t_l] t_l:pfcSearchTL(_348030)
   Fail: (214) [t_l] t_l:pfcSearchTL(_348030)
^  Redo: (213) [user] pfcGetSearch(_346180)
^  Call: (214) [user] pfcSearch(_350804)
^  Unify: (214) [user] pfcSearch(direct)
^  Exit: (214) [user] pfcSearch(direct)
   Call: (214) [system] _346180=direct
   Exit: (214) [system] direct=direct
^  Exit: (213) [user] pfcGetSearch(direct)
^  Call: (213) [user] pfcEnqueue(direct, 'next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (213) [user] pfcEnqueue(direct, 'next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
   Call: (214) [system] direct=direct
   Exit: (214) [system] direct=direct
^  Call: (214) [user] pfcFwd('next-operation'(op(exec, 'include!', '&corelib')))
^  Unify: (214) [user] pfcFwd('next-operation'(op(exec, 'include!', '&corelib')))
^  Call: (215) [user] control_arg_types('next-operation'(op(exec, 'include!', '&corelib')), _375278)
^  Unify: (215) [user] control_arg_types('next-operation'(op(exec, 'include!', '&corelib')), _375278)
   Call: (216) [system] fail
   Fail: (216) [system] fail
^  Fail: (215) [user] control_arg_types('next-operation'(op(exec, 'include!', '&corelib')), _375278)
^  Redo: (214) [user] pfcFwd('next-operation'(op(exec, 'include!', '&corelib')))
^  Unify: (214) [user] pfcFwd('next-operation'(op(exec, 'include!', '&corelib')))
^  Call: (215) [user] locally_each:locally(set_prolog_flag(occurs_check, true), pfcFwd0('next-operation'(op(exec, 'include!', '&corelib'))))
^  Unify: (215) [locally_each] locally_each:locally(user:set_prolog_flag(occurs_check, true), user:pfcFwd0('next-operation'(op(exec, 'include!', '&corelib'))))
^  Call: (216) [locally_each] locally_each:wtl(user, set_prolog_flag(occurs_check, true), user:pfcFwd0('next-operation'(op(exec, 'include!', '&corelib'))), user:each_call_cleanup)
^  Unify: (216) [locally_each] locally_each:wtl(user, set_prolog_flag(occurs_check, true), user:pfcFwd0('next-operation'(op(exec, 'include!', '&corelib'))), user:each_call_cleanup)
   Call: (217) [system] current_prolog_flag(occurs_check, _385540)
   Exit: (217) [system] current_prolog_flag(occurs_check, true)
^  Call: (217) [locally_each] locally_each:wtl_how(trusted_redo_call_cleanup, true==true, user:set_prolog_flag(occurs_check, true), user:pfcFwd0('next-operation'(op(exec, 'include!', '&corelib'))), user:set_prolog_flag(occurs_check, true))
^  Unify: (217) [locally_each] locally_each:wtl_how(locally_each:trusted_redo_call_cleanup, locally_each:(true==true), user:set_prolog_flag(occurs_check, true), user:pfcFwd0('next-operation'(op(exec, 'include!', '&corelib'))), user:set_prolog_flag(occurs_check, true))
   Call: (218) [system] true==true
   Exit: (218) [system] true==true
^  Call: (218) [user] pfcFwd0('next-operation'(op(exec, 'include!', '&corelib')))
^  Unify: (218) [user] pfcFwd0('next-operation'(op(exec, 'include!', '&corelib')))
   Call: (219) [system] is_list(_393036)
   Fail: (219) [system] is_list(_393036)
^  Redo: (218) [user] pfcFwd0('next-operation'(op(exec, 'include!', '&corelib')))
^  Call: (219) [user] pfcFwd1('next-operation'(op(exec, 'include!', '&corelib')))
^  Unify: (219) [user] pfcFwd1('next-operation'(op(exec, 'include!', '&corelib')))
^  Call: (220) [user] fc_rule_check('next-operation'(op(exec, 'include!', '&corelib')))
^  Unify: (220) [user] fc_rule_check('next-operation'(op(exec, 'include!', '&corelib')))
^  Exit: (220) [user] fc_rule_check('next-operation'(op(exec, 'include!', '&corelib')))
   Call: (220) [system] copy_term('next-operation'(op(exec, 'include!', '&corelib')), _400430)
   Exit: (220) [system] copy_term('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation'(op(exec, 'include!', '&corelib')))
^  Call: (220) [user] ignore(fcpt('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation'(op(exec, 'include!', '&corelib'))))
^  Unify: (220) [system] ignore(user:fcpt('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation'(op(exec, 'include!', '&corelib'))))
^  Call: (221) [user] fcpt('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation'(op(exec, 'include!', '&corelib')))
^  Unify: (221) [user] fcpt('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation'(op(exec, 'include!', '&corelib')))
^  Call: (222) [user] pfcGetTriggerQuick('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
^  Unify: (222) [user] pfcGetTriggerQuick('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
^  Call: (223) [user] clause('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), true)
^  Fail: (223) [user] clause('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), true)
^  Redo: (222) [user] pfcGetTriggerQuick('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
^  Call: (223) [user] pfc_call('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
^  Unify: (223) [user] pfc_call('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Call: (224) [system] var('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Fail: (224) [system] var('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
^  Redo: (223) [user] pfc_call('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
^  Unify: (223) [user] pfc_call('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Call: (224) [system] callable('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Exit: (224) [system] callable('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
^  Unify: (223) [user] pfc_call('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
^  Redo: (223) [user] pfc_call('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
^  Unify: (223) [user] pfc_call('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
^  Call: (224) [user] predicate_property('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), imported_from(system))
^  Unify: (224) [$syspreds] predicate_property(user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), imported_from(system))
   Call: (225) [system] nonvar(imported_from(system))
   Exit: (225) [system] nonvar(imported_from(system))
   Call: (225) [$syspreds] property_predicate(imported_from(system), user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Unify: (225) [$syspreds] property_predicate(imported_from(system), user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Call: (226) [$syspreds] define_or_generate(user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Unify: (226) [$syspreds] define_or_generate(user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Call: (227) [system] callable('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Exit: (227) [system] callable('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Call: (227) [system] atom(user)
   Exit: (227) [system] atom(user)
   Exit: (226) [$syspreds] define_or_generate(user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
^  Fail: (224) [$syspreds] predicate_property(user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), imported_from(system))
^  Redo: (223) [user] pfc_call('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
^  Unify: (223) [user] pfc_call('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
^  Call: (224) [user] predicate_property('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), built_in)
^  Unify: (224) [$syspreds] predicate_property(user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), built_in)
   Call: (225) [system] nonvar(built_in)
   Exit: (225) [system] nonvar(built_in)
   Call: (225) [$syspreds] property_predicate(built_in, user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Unify: (225) [$syspreds] property_predicate(built_in, user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Call: (226) [system] callable('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Exit: (226) [system] callable('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Call: (226) [$syspreds] goal_name_arity('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), _443092, _443094)
   Unify: (226) [$syspreds] goal_name_arity('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), _443092, _443094)
   Call: (227) [system] compound('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Exit: (227) [system] compound('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Call: (227) [system] compound_name_arity('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), _443092, _443094)
   Exit: (227) [system] compound_name_arity('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), '$pt$', 2)
   Exit: (226) [$syspreds] goal_name_arity('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), '$pt$', 2)
^  Call: (226) [$syspreds] current_predicate(user:'$pt$'/2)
^  Exit: (226) [$syspreds] current_predicate(user:'$pt$'/2)
^  Fail: (224) [$syspreds] predicate_property(user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), built_in)
^  Redo: (223) [user] pfc_call('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
^  Unify: (223) [user] pfc_call('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
^  Call: (224) [user] predicate_property('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), _454334)
^  Unify: (224) [$syspreds] predicate_property(user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), _455274)
   Call: (225) [system] nonvar(_456132)
^  Redo: (224) [$syspreds] predicate_property(user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), _457134)
^  Unify: (224) [$syspreds] predicate_property(user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), _458068)
   Call: (225) [$syspreds] define_or_generate(user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Unify: (225) [$syspreds] define_or_generate(user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Call: (226) [system] callable('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Exit: (226) [system] callable('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Call: (226) [system] atom(user)
   Exit: (226) [system] atom(user)
   Exit: (225) [$syspreds] define_or_generate(user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
^  Exit: (224) [$syspreds] predicate_property(user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), interpreted)
^  Unify: (223) [user] pfc_call('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
^  Call: (224) [user] predicate_property('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), number_of_clauses(_467262))
^  Unify: (224) [$syspreds] predicate_property(user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), number_of_clauses(_467262))
   Call: (225) [system] nonvar(number_of_clauses(_467262))
   Exit: (225) [system] nonvar(number_of_clauses(_467262))
   Call: (225) [$syspreds] property_predicate(number_of_clauses(_467262), user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Unify: (225) [$syspreds] property_predicate(number_of_clauses(_467262), user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Call: (226) [$syspreds] define_or_generate(user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Unify: (226) [$syspreds] define_or_generate(user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Call: (227) [system] callable('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Exit: (227) [system] callable('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Call: (227) [system] atom(user)
   Exit: (227) [system] atom(user)
   Exit: (226) [$syspreds] define_or_generate(user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
   Exit: (225) [$syspreds] property_predicate(number_of_clauses(0), user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
^  Exit: (224) [$syspreds] predicate_property(user:'$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), number_of_clauses(0))
^  Unify: (223) [user] pfc_call('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
^  Call: (224) [user] setup_call_cleanup(nb_current('$pfc_current_choice', _482106), (prolog_current_choice(_482116), push_current_choice(_482116), clause('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), _482138), pfc_call(_482138)), nb_setval('$pfc_current_choice', _482106))
^  Unify: (224) [system] setup_call_cleanup(user:nb_current('$pfc_current_choice', _482106), user:(prolog_current_choice(_482116), push_current_choice(_482116), clause('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), _482138), pfc_call(_482138)), user:nb_setval('$pfc_current_choice', _482106))
^  Call: (225) [system] sig_atomic(user:nb_current('$pfc_current_choice', _482106))
   Call: (227) [system] nb_current('$pfc_current_choice', _482106)
   Exit: (227) [system] nb_current('$pfc_current_choice', [])
^  Exit: (225) [system] sig_atomic(user:nb_current('$pfc_current_choice', []))
   Call: (226) [system] prolog_current_choice(_482116)
   Exit: (226) [system] prolog_current_choice(2950)
^  Call: (226) [user] push_current_choice(2950)
^  Unify: (226) [user] push_current_choice(2950)
   Call: (227) [system] nb_current('$pfc_current_choice', _491456)
   Exit: (227) [system] nb_current('$pfc_current_choice', [])
   Call: (227) [system] b_setval('$pfc_current_choice', [2950])
   Exit: (227) [system] b_setval('$pfc_current_choice', [2950])
^  Exit: (226) [user] push_current_choice(2950)
^  Call: (226) [user] clause('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), _482138)
^  Fail: (226) [user] clause('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), _482138)
   Call: (226) [$syspreds] nb_setval('$pfc_current_choice', [])
   Unify: (226) [$syspreds] nb_setval('$pfc_current_choice', [])
   Call: (227) [system] duplicate_term([], _499828)
   Exit: (227) [system] duplicate_term([], [])
   Call: (227) [system] nb_linkval('$pfc_current_choice', [])
   Exit: (227) [system] nb_linkval('$pfc_current_choice', [])
   Exit: (226) [$syspreds] nb_setval('$pfc_current_choice', [])
^  Fail: (224) [system] setup_call_cleanup(user:nb_current('$pfc_current_choice', _482106), user:(prolog_current_choice(_482116), push_current_choice(_482116), clause('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022), _482138), pfc_call(_482138)), user:nb_setval('$pfc_current_choice', _482106))
^  Fail: (223) [user] pfc_call('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
^  Fail: (222) [user] pfcGetTriggerQuick('$pt$'('next-operation'(op(exec, 'include!', '&corelib')), _406022))
^  Redo: (221) [user] fcpt('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation'(op(exec, 'include!', '&corelib')))
^  Unify: (221) [user] fcpt('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation'(op(exec, 'include!', '&corelib')))
^  Exit: (221) [user] fcpt('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation'(op(exec, 'include!', '&corelib')))
^  Exit: (220) [system] ignore(user:fcpt('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation'(op(exec, 'include!', '&corelib'))))
^  Call: (220) [user] ignore(fcnt('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation'(op(exec, 'include!', '&corelib'))))
^  Unify: (220) [system] ignore(user:fcnt('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation'(op(exec, 'include!', '&corelib'))))
^  Call: (221) [user] fcnt('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation'(op(exec, 'include!', '&corelib')))
^  Unify: (221) [user] fcnt('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation'(op(exec, 'include!', '&corelib')))
^  Call: (222) [user] pfc_spft(_514698, _514784, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _514704, _514706))
^  Unify: (222) [user] pfc_spft(_514698, _515716, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _514704, _514706))
^  Call: (223) [user] pfcCallSystem('$spft$'(_514698, _516576, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _514704, _514706)))
^  Unify: (223) [user] pfcCallSystem('$spft$'(_514698, _516576, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _514704, _514706)))
^  Call: (224) [user] pfc_call('$spft$'(_514698, _516576, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _514704, _514706)))
^  Unify: (224) [user] pfc_call('$spft$'(_514698, _516576, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _514704, _514706)))
   Call: (225) [system] var('$spft$'(_514698, _516576, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _514704, _514706)))
   Fail: (225) [system] var('$spft$'(_514698, _516576, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _514704, _514706)))
^  Redo: (224) [user] pfc_call('$spft$'(_514698, _516576, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _514704, _514706)))
^  Unify: (224) [user] pfc_call('$spft$'(_514698, _516576, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _514704, _514706)))
   Call: (225) [system] callable('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Exit: (225) [system] callable('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
^  Unify: (224) [user] pfc_call('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
^  Redo: (224) [user] pfc_call('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
^  Unify: (224) [user] pfc_call('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
^  Call: (225) [user] predicate_property('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), imported_from(system))
^  Unify: (225) [$syspreds] predicate_property(user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), imported_from(system))
   Call: (226) [system] nonvar(imported_from(system))
   Exit: (226) [system] nonvar(imported_from(system))
   Call: (226) [$syspreds] property_predicate(imported_from(system), user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Unify: (226) [$syspreds] property_predicate(imported_from(system), user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Call: (227) [$syspreds] define_or_generate(user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Unify: (227) [$syspreds] define_or_generate(user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Call: (228) [system] callable('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Exit: (228) [system] callable('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Call: (228) [system] atom(user)
   Exit: (228) [system] atom(user)
   Exit: (227) [$syspreds] define_or_generate(user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
^  Fail: (225) [$syspreds] predicate_property(user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), imported_from(system))
^  Redo: (224) [user] pfc_call('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
^  Unify: (224) [user] pfc_call('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
^  Call: (225) [user] predicate_property('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), built_in)
^  Unify: (225) [$syspreds] predicate_property(user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), built_in)
   Call: (226) [system] nonvar(built_in)
   Exit: (226) [system] nonvar(built_in)
   Call: (226) [$syspreds] property_predicate(built_in, user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Unify: (226) [$syspreds] property_predicate(built_in, user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Call: (227) [system] callable('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Exit: (227) [system] callable('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Call: (227) [$syspreds] goal_name_arity('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), _30578, _30580)
   Unify: (227) [$syspreds] goal_name_arity('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), _30578, _30580)
   Call: (228) [system] compound('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Exit: (228) [system] compound('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Call: (228) [system] compound_name_arity('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), _30578, _30580)
   Exit: (228) [system] compound_name_arity('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), '$spft$', 3)
   Exit: (227) [$syspreds] goal_name_arity('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), '$spft$', 3)
^  Call: (227) [$syspreds] current_predicate(user:'$spft$'/3)
^  Exit: (227) [$syspreds] current_predicate(user:'$spft$'/3)
^  Fail: (225) [$syspreds] predicate_property(user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), built_in)
^  Redo: (224) [user] pfc_call('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
^  Unify: (224) [user] pfc_call('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
^  Call: (225) [user] predicate_property('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), _41820)
^  Unify: (225) [$syspreds] predicate_property(user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), _42760)
   Call: (226) [system] nonvar(_43618)
^  Redo: (225) [$syspreds] predicate_property(user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), _44620)
^  Unify: (225) [$syspreds] predicate_property(user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), _45554)
   Call: (226) [$syspreds] define_or_generate(user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Unify: (226) [$syspreds] define_or_generate(user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Call: (227) [system] callable('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Exit: (227) [system] callable('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Call: (227) [system] atom(user)
   Exit: (227) [system] atom(user)
   Exit: (226) [$syspreds] define_or_generate(user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
^  Exit: (225) [$syspreds] predicate_property(user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), interpreted)
^  Unify: (224) [user] pfc_call('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
^  Call: (225) [user] predicate_property('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), number_of_clauses(_54748))
^  Unify: (225) [$syspreds] predicate_property(user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), number_of_clauses(_54748))
   Call: (226) [system] nonvar(number_of_clauses(_54748))
   Exit: (226) [system] nonvar(number_of_clauses(_54748))
   Call: (226) [$syspreds] property_predicate(number_of_clauses(_54748), user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Unify: (226) [$syspreds] property_predicate(number_of_clauses(_54748), user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Call: (227) [$syspreds] define_or_generate(user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Unify: (227) [$syspreds] define_or_generate(user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Call: (228) [system] callable('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Exit: (228) [system] callable('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Call: (228) [system] atom(user)
   Exit: (228) [system] atom(user)
   Exit: (227) [$syspreds] define_or_generate(user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
   Exit: (226) [$syspreds] property_predicate(number_of_clauses(713), user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
^  Exit: (225) [$syspreds] predicate_property(user:'$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), number_of_clauses(713))
^  Unify: (224) [user] pfc_call('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
^  Call: (225) [user] setup_call_cleanup(nb_current('$pfc_current_choice', _69592), (prolog_current_choice(_69602), push_current_choice(_69602), clause('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), _69624), pfc_call(_69624)), nb_setval('$pfc_current_choice', _69592))
^  Unify: (225) [system] setup_call_cleanup(user:nb_current('$pfc_current_choice', _69592), user:(prolog_current_choice(_69602), push_current_choice(_69602), clause('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), _69624), pfc_call(_69624)), user:nb_setval('$pfc_current_choice', _69592))
^  Call: (226) [system] sig_atomic(user:nb_current('$pfc_current_choice', _69592))
   Call: (228) [system] nb_current('$pfc_current_choice', _69592)
   Exit: (228) [system] nb_current('$pfc_current_choice', [])
^  Exit: (226) [system] sig_atomic(user:nb_current('$pfc_current_choice', []))
   Call: (227) [system] prolog_current_choice(_69602)
   Exit: (227) [system] prolog_current_choice(2970)
^  Call: (227) [user] push_current_choice(2970)
^  Unify: (227) [user] push_current_choice(2970)
   Call: (228) [system] nb_current('$pfc_current_choice', _78942)
   Exit: (228) [system] nb_current('$pfc_current_choice', [])
   Call: (228) [system] b_setval('$pfc_current_choice', [2970])
   Exit: (228) [system] b_setval('$pfc_current_choice', [2970])
^  Exit: (227) [user] push_current_choice(2970)
^  Call: (227) [user] clause('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), _69624)
^  Fail: (227) [user] clause('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), _69624)
   Call: (227) [$syspreds] nb_setval('$pfc_current_choice', [])
   Unify: (227) [$syspreds] nb_setval('$pfc_current_choice', [])
   Call: (228) [system] duplicate_term([], _87314)
   Exit: (228) [system] duplicate_term([], [])
   Call: (228) [system] nb_linkval('$pfc_current_choice', [])
   Exit: (228) [system] nb_linkval('$pfc_current_choice', [])
   Exit: (227) [$syspreds] nb_setval('$pfc_current_choice', [])
^  Fail: (225) [system] setup_call_cleanup(user:nb_current('$pfc_current_choice', _69592), user:(prolog_current_choice(_69602), push_current_choice(_69602), clause('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)), _69624), pfc_call(_69624)), user:nb_setval('$pfc_current_choice', _69592))
^  Fail: (224) [user] pfc_call('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
^  Fail: (223) [user] pfcCallSystem('$spft$'(_3732, _3746, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740)))
^  Fail: (222) [user] pfc_spft(_3732, _94818, '$nt$'('next-operation'(op(exec, 'include!', '&corelib')), _3738, _3740))
^  Redo: (221) [user] fcnt('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation'(op(exec, 'include!', '&corelib')))
^  Unify: (221) [user] fcnt('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation'(op(exec, 'include!', '&corelib')))
^  Exit: (221) [user] fcnt('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation'(op(exec, 'include!', '&corelib')))
^  Exit: (220) [system] ignore(user:fcnt('next-operation'(op(exec, 'include!', '&corelib')), 'next-operation'(op(exec, 'include!', '&corelib'))))
^  Exit: (219) [user] pfcFwd1('next-operation'(op(exec, 'include!', '&corelib')))
^  Exit: (218) [user] pfcFwd0('next-operation'(op(exec, 'include!', '&corelib')))
^  Exit: (217) [locally_each] locally_each:wtl_how(locally_each:trusted_redo_call_cleanup, locally_each:(true==true), user:set_prolog_flag(occurs_check, true), user:pfcFwd0('next-operation'(op(exec, 'include!', '&corelib'))), user:set_prolog_flag(occurs_check, true))
^  Exit: (216) [locally_each] locally_each:wtl(user, set_prolog_flag(occurs_check, true), user:pfcFwd0('next-operation'(op(exec, 'include!', '&corelib'))), user:each_call_cleanup)
^  Exit: (215) [locally_each] locally_each:locally(user:set_prolog_flag(occurs_check, true), user:pfcFwd0('next-operation'(op(exec, 'include!', '&corelib'))))
^  Exit: (214) [user] pfcFwd('next-operation'(op(exec, 'include!', '&corelib')))
^  Exit: (213) [user] pfcEnqueue(direct, 'next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (212) [user] pfcEnqueue('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (210) [user] must_ex(pfcEnqueue('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Exit: (209) [user] pfcPost2('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (208) [user] pfcPost11('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (206) [locally_each] locally_each:wtl_how(locally_each:trusted_redo_call_cleanup, locally_each:(true==true), user:set_prolog_flag(occurs_check, true), user:catch(pfcPost11('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _3502, (notrace, wdmsg(('next-operation'(op(exec, 'include!', '&corelib'))=>_3502)), trace)), user:set_prolog_flag(occurs_check, true))
^  Exit: (205) [locally_each] locally_each:wtl(user, set_prolog_flag(occurs_check, true), user:catch(pfcPost11('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _3502, (notrace, wdmsg(('next-operation'(op(exec, 'include!', '&corelib'))=>_3502)), trace)), user:each_call_cleanup)
^  Exit: (204) [locally_each] locally_each:locally(user:set_prolog_flag(occurs_check, true), user:catch(pfcPost11('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _3502, (notrace, wdmsg(('next-operation'(op(exec, 'include!', '&corelib'))=>_3502)), trace)))
^  Exit: (203) [user] pfcPost1('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (202) [user] pfcPost_rev((P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax), 'next-operation'(op(exec, 'include!', '&corelib')))
^  Exit: (201) [user] pfcPost('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (201) [user] pfcRun
^  Unify: (201) [user] pfcRun
^  Call: (202) [user] pfcGetSearch(direct)
^  Unify: (202) [user] pfcGetSearch(direct)
   Call: (203) [t_l] t_l:pfcSearchTL(_192344)
   Fail: (203) [t_l] t_l:pfcSearchTL(_192344)
^  Redo: (202) [user] pfcGetSearch(direct)
^  Call: (203) [user] pfcSearch(_195118)
^  Unify: (203) [user] pfcSearch(direct)
^  Exit: (203) [user] pfcSearch(direct)
   Call: (203) [system] direct=direct
   Exit: (203) [system] direct=direct
^  Exit: (202) [user] pfcGetSearch(direct)
^  Unify: (201) [user] pfcRun
^  Exit: (201) [user] pfcRun
^  Exit: (200) [user] pfcAdd('next-operation'(op(exec, 'include!', '&corelib')), (P;HTML|mfl4(_3478, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (199) [user] pfcAdd('next-operation'(op(exec, 'include!', '&corelib')))
^  Exit: (198) [user] pfcAdd_Now('next-operation'(op(exec, 'include!', '&corelib')))
^  Exit: (197) [user] if_t(into_simple_op(exec, ['include!', '&corelib', stdlib_minimal], op(exec, 'include!', '&corelib')), pfcAdd_Now('next-operation'(op(exec, 'include!', '&corelib'))))
   Call: (197) [user] dont_give_up(do_metta_exec(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), '&self', ['include!', '&corelib', stdlib_minimal], _3362))
   Unify: (197) [user] dont_give_up(do_metta_exec(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), '&self', ['include!', '&corelib', stdlib_minimal], _3362))
   Call: (199) [user] do_metta_exec(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), '&self', ['include!', '&corelib', stdlib_minimal], _3362)
   Unify: (199) [user] do_metta_exec(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), '&self', ['include!', '&corelib', stdlib_minimal], _3362)
   Call: (200) [system] _232198=_232200
   Exit: (200) [system] _232198=_232198
^  Call: (200) [user] ignore(catch((not_compatio(write_exec(['include!', '&corelib', stdlib_minimal])), notrace(into_metta_callable('&self', ['include!', '&corelib', stdlib_minimal], _234096, _232198, _234100, _234102)), !, user:interactively_do_metta_exec(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), '&self', ['include!', '&corelib', stdlib_minimal], _234096, _232198, _234100, _234102, _232198, _3362)), give_up(_234138), pp_m('red', gave_up(_234138))))
^  Unify: (200) [system] ignore(user:catch((not_compatio(write_exec(['include!', '&corelib', stdlib_minimal])), notrace(into_metta_callable('&self', ['include!', '&corelib', stdlib_minimal], _234096, _232198, _234100, _234102)), !, user:interactively_do_metta_exec(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), '&self', ['include!', '&corelib', stdlib_minimal], _234096, _232198, _234100, _234102, _232198, _3362)), give_up(_234138), pp_m('red', gave_up(_234138))))
^  Call: (203) [user] not_compatio(write_exec(['include!', '&corelib', stdlib_minimal]))
^  Unify: (203) [user] not_compatio(write_exec(['include!', '&corelib', stdlib_minimal]))
^  Call: (204) [user] if_t(once((is_mettalog;is_testing)), user_err(write_exec(['include!', '&corelib', stdlib_minimal])))
^  Unify: (204) [user] if_t(once((is_mettalog;is_testing)), user_err(write_exec(['include!', '&corelib', stdlib_minimal])))
^  Call: (205) [user] once((is_mettalog;is_testing))
^  Unify: (205) [system] once(user:(is_mettalog;is_testing))
^  Call: (207) [user] is_mettalog
^  Unify: (207) [user] is_mettalog
^  Call: (208) [user] is_win64
^  Unify: (208) [user] is_win64
   Call: (209) [system] current_prolog_flag(windows, _253400)
   Fail: (209) [system] current_prolog_flag(windows, _254328)
^  Fail: (208) [user] is_win64
^  Redo: (207) [user] is_mettalog
^  Unify: (207) [user] is_mettalog
^  Call: (208) [user] is_metta_flag(log)
^  Unify: (208) [user] is_metta_flag(log)
^  Call: (210) [system] setup_call_cleanup('$notrace'(_259788, _259790), once(user:is_flag0(log)), '$restore_trace'(_259788, _259790))
^  Unify: (210) [system] setup_call_cleanup(system:'$notrace'(_259788, _259790), system:once(user:is_flag0(log)), system:'$restore_trace'(_259788, _259790))
^  Call: (211) [system] sig_atomic(system:'$notrace'(_259788, _259790))
^  Fail: (208) [user] is_metta_flag(log)
^  Fail: (207) [user] is_mettalog
^  Call: (207) [user] is_testing
^  Unify: (207) [user] is_testing
^  Call: (208) [user] is_metta_flag(test)
^  Unify: (208) [user] is_metta_flag(test)
^  Call: (210) [system] setup_call_cleanup('$notrace'(_268158, _268160), once(user:is_flag0(test)), '$restore_trace'(_268158, _268160))
^  Unify: (210) [system] setup_call_cleanup(system:'$notrace'(_268158, _268160), system:once(user:is_flag0(test)), system:'$restore_trace'(_268158, _268160))
^  Call: (211) [system] sig_atomic(system:'$notrace'(_268158, _268160))
^  Exit: (210) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:is_flag0(test)), system:'$restore_trace'(3, -1))
^  Exit: (208) [user] is_metta_flag(test)
^  Exit: (207) [user] is_testing
^  Exit: (205) [system] once(user:(is_mettalog;is_testing))
^  Call: (205) [user] user_err(write_exec(['include!', '&corelib', stdlib_minimal]))
^  Unify: (205) [user] user_err(write_exec(['include!', '&corelib', stdlib_minimal]))
^  Call: (206) [user] original_user_error(_276554)
^  Unify: (206) [user] original_user_error(_276554)
   Call: (207) [system] stream_property(_276554, file_no(2))
   Unify: (207) [system] stream_property(_276554, file_no(2))
   Call: (208) [system] nonvar(_276554)
   Redo: (207) [system] stream_property(_276554, file_no(2))
   Unify: (207) [system] stream_property(_276554, file_no(2))
   Call: (208) [system] nonvar(_276554)
   Redo: (207) [system] stream_property(_276554, file_no(2))
   Unify: (207) [system] stream_property(_276554, file_no(2))
   Call: (208) [system] nonvar(file_no(2))
   Exit: (208) [system] nonvar(file_no(2))
   Call: (208) [system] file_no(2)=alias(_287674)
   Redo: (207) [system] stream_property(_276554, file_no(2))
   Exit: (207) [system] stream_property((0x7f675162f200), file_no(2))
^  Exit: (206) [user] original_user_error((0x7f675162f200))
^  Call: (206) [user] with_output_to((0x7f675162f200), write_exec(['include!', '&corelib', stdlib_minimal]))
   Call: (208) [user] write_exec(['include!', '&corelib', stdlib_minimal])
   Unify: (208) [user] write_exec(['include!', '&corelib', stdlib_minimal])
^  Call: (209) [user] real_notrace(write_exec0(['include!', '&corelib', stdlib_minimal]))
^  Unify: (209) [user] real_notrace(user:write_exec0(['include!', '&corelib', stdlib_minimal]))
^  Call: (210) [user] setup_call_cleanup('$notrace'(_296058, _296060), once(user:write_exec0(['include!', '&corelib', stdlib_minimal])), '$restore_trace'(_296058, _296060))
^  Unify: (210) [system] setup_call_cleanup(user:'$notrace'(_296058, _296060), user:once(user:write_exec0(['include!', '&corelib', stdlib_minimal])), user:'$restore_trace'(_296058, _296060))
^  Call: (211) [system] sig_atomic(user:'$notrace'(_296058, _296060))
  !(include! &corelib stdlib_minimal)

^  Exit: (210) [system] setup_call_cleanup(user:'$notrace'(3, -1), user:once(user:write_exec0(['include!', '&corelib', stdlib_minimal])), user:'$restore_trace'(3, -1))
^  Exit: (209) [user] real_notrace(user:write_exec0(['include!', '&corelib', stdlib_minimal]))
   Exit: (208) [user] write_exec(['include!', '&corelib', stdlib_minimal])
^  Exit: (206) [user] with_output_to((0x7f675162f200), write_exec(['include!', '&corelib', stdlib_minimal]))
^  Exit: (205) [user] user_err(write_exec(['include!', '&corelib', stdlib_minimal]))
^  Exit: (204) [user] if_t(once((is_mettalog;is_testing)), user_err(write_exec(['include!', '&corelib', stdlib_minimal])))
^  Exit: (203) [user] not_compatio(write_exec(['include!', '&corelib', stdlib_minimal]))
^  Call: (204) [system] setup_call_cleanup('$notrace'(_307788, _307790), once(user:into_metta_callable('&self', ['include!', '&corelib', stdlib_minimal], _234096, _232198, _234100, _234102)), '$restore_trace'(_307788, _307790))
^  Unify: (204) [system] setup_call_cleanup(system:'$notrace'(_307788, _307790), system:once(user:into_metta_callable('&self', ['include!', '&corelib', stdlib_minimal], _234096, _232198, _234100, _234102)), system:'$restore_trace'(_307788, _307790))
^  Call: (205) [system] sig_atomic(system:'$notrace'(_307788, _307790))
^  Exit: (204) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:into_metta_callable('&self', ['include!', '&corelib', stdlib_minimal], eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), _232198, [], [])), system:'$restore_trace'(3, -1))
   Call: (203) [user] interactively_do_metta_exec(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), '&self', ['include!', '&corelib', stdlib_minimal], eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), _232198, [], [], _232198, _3362)
   Unify: (203) [user] interactively_do_metta_exec(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), '&self', ['include!', '&corelib', stdlib_minimal], eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), _232198, [], [], _232198, _3362)
   Call: (204) [user] reset_caches
   Unify: (204) [user] reset_caches
^  Call: (205) [user] forall(clause(reset_cache, _323766), forall(rtrace_on_error(_323766), true))
^  Unify: (205) [$apply] forall(user:clause(reset_cache, _323766), user:forall(rtrace_on_error(_323766), true))
^  Call: (206) [user] clause(reset_cache, _323766)
^  Exit: (206) [user] clause(reset_cache, retractall(get_operator_typedef0(_326600, _326602, _326604, _326606, _326608)))
^  Call: (206) [user] forall(rtrace_on_error(retractall(get_operator_typedef0(_326600, _326602, _326604, _326606, _326608))), true)
^  Unify: (206) [$apply] forall(user:rtrace_on_error(retractall(get_operator_typedef0(_326600, _326602, _326604, _326606, _326608))), user:true)
   Call: (207) [user] rtrace_on_error(retractall(get_operator_typedef0(_326600, _326602, _326604, _326606, _326608)))
   Unify: (207) [user] rtrace_on_error(retractall(get_operator_typedef0(_326600, _326602, _326604, _326606, _326608)))
   Call: (208) [user] catch_err(retractall(get_operator_typedef0(_326600, _326602, _326604, _326606, _326608)), _331252, (write_src_uo(_331252=retractall(get_operator_typedef0(_326600, _326602, _326604, _326606, _326608))), catch(rtrace(retractall(get_operator_typedef0(_326600, _326602, _326604, _326606, _326608))), _331252, throw(give_up(_331252=retractall(get_operator_typedef0(_326600, _326602, _326604, _326606, _326608))))), throw(_331252)))
   Unify: (208) [user] catch_err(retractall(get_operator_typedef0(_326600, _326602, _326604, _326606, _326608)), _331252, (write_src_uo(_331252=retractall(get_operator_typedef0(_326600, _326602, _326604, _326606, _326608))), catch(rtrace(retractall(get_operator_typedef0(_326600, _326602, _326604, _326606, _326608))), _331252, throw(give_up(_331252=retractall(get_operator_typedef0(_326600, _326602, _326604, _326606, _326608))))), throw(_331252)))
^  Call: (210) [user] retractall(get_operator_typedef0(_326600, _326602, _326604, _326606, _326608))
^  Exit: (210) [user] retractall(get_operator_typedef0(_326600, _326602, _326604, _326606, _326608))
   Exit: (208) [user] catch_err(retractall(get_operator_typedef0(_326600, _326602, _326604, _326606, _326608)), _331252, (write_src_uo(_331252=retractall(get_operator_typedef0(_326600, _326602, _326604, _326606, _326608))), catch(rtrace(retractall(get_operator_typedef0(_326600, _326602, _326604, _326606, _326608))), _331252, throw(give_up(_331252=retractall(get_operator_typedef0(_326600, _326602, _326604, _326606, _326608))))), throw(_331252)))
   Exit: (207) [user] rtrace_on_error(retractall(get_operator_typedef0(_326600, _326602, _326604, _326606, _326608)))
^  Exit: (206) [$apply] forall(user:rtrace_on_error(retractall(get_operator_typedef0(_326600, _326602, _326604, _326606, _326608))), user:true)
^  Redo: (206) [user] clause(reset_cache, _323766)
^  Exit: (206) [user] clause(reset_cache, true)
^  Call: (206) [user] forall(rtrace_on_error(true), true)
^  Unify: (206) [$apply] forall(user:rtrace_on_error(true), user:true)
   Call: (207) [user] rtrace_on_error(true)
   Unify: (207) [user] rtrace_on_error(true)
   Call: (208) [user] catch_err(true, _343376, (write_src_uo(_343376=true), catch(rtrace(true), _343376, throw(give_up(_343376=true))), throw(_343376)))
   Unify: (208) [user] catch_err(true, _343376, (write_src_uo(_343376=true), catch(rtrace(true), _343376, throw(give_up(_343376=true))), throw(_343376)))
   Exit: (208) [user] catch_err(true, _343376, (write_src_uo(_343376=true), catch(rtrace(true), _343376, throw(give_up(_343376=true))), throw(_343376)))
   Exit: (207) [user] rtrace_on_error(true)
^  Exit: (206) [$apply] forall(user:rtrace_on_error(true), user:true)
^  Exit: (205) [$apply] forall(user:clause(reset_cache, _323766), user:forall(rtrace_on_error(_323766), true))
   Exit: (204) [user] reset_caches
   Call: (205) [user] interactively_do_metta_exec00(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), '&self', ['include!', '&corelib', stdlib_minimal], eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), _232198, [], [], _232198, _3362)
   Unify: (205) [user] interactively_do_metta_exec00(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), '&self', ['include!', '&corelib', stdlib_minimal], eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), _232198, [], [], _232198, _3362)
   Call: (207) [user] interactively_do_metta_exec01(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), '&self', ['include!', '&corelib', stdlib_minimal], eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), _232198, [], [], _232198, _3362)
   Unify: (207) [user] interactively_do_metta_exec01(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), '&self', ['include!', '&corelib', stdlib_minimal], eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), _232198, [], [], _232198, _3362)
   Call: (208) [user] file_hides_results(eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198))
   Redo: (207) [user] interactively_do_metta_exec01(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), '&self', ['include!', '&corelib', stdlib_minimal], eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), _232198, [], [], _232198, _3362)
   Unify: (207) [user] interactively_do_metta_exec01(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), '&self', ['include!', '&corelib', stdlib_minimal], eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), _232198, [], [], _232198, _3362)
^  Call: (209) [system] setup_call_cleanup('$notrace'(_380524, _380526), once(user:(reset_eval_num, _379996=res(_3362), _380012=prev_result('Empty'), inside_assert(eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), _380030), (is_compatio->option_else(answer, _380054, leap);option_else(answer, _380054, each)), option_else('maximum-result-count', _380076, inf), option_else('initial-result-count', _380090, 10), _380102=contrl(_380076, _380054), _380120=_380122, (file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')=file(_380150), option_value(exec, skip), \+always_exec(_380030)->_380180=(skip(eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198)), deterministic(_380196)), _380120=1, !, true;_380180=(eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), deterministic(_380196), xform_out(_232198, _380254), nb_setarg(1, _379996, _380254)), !, flag(result_num, _380280, 0), _380292=eval('&self', _380030, _232198), \+ \+ (user:maplist(name_vars, []), user:name_vars('OUT'=_232198), if_t(_380120==1, writeln(' ; SKIPPING')), if_t((is_interactive(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'));_380120==1), (if_t(\+option_value(doing_repl, true), if_t(\+option_value(repl, true), if_t(option_value(prolog, true), add_history_pl(_380292)))), if_t(option_value(repl, true), add_history_src(exec(_380030))))), prolog_only(color_g_mesg('#da70d6', (write('% DEBUG:   '), writeq(_380292), writeln('.')))), true)))), '$restore_trace'(_380524, _380526))
^  Unify: (209) [system] setup_call_cleanup(system:'$notrace'(_380524, _380526), system:once(user:(reset_eval_num, _379996=res(_3362), _380012=prev_result('Empty'), inside_assert(eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), _380030), (is_compatio->option_else(answer, _380054, leap);option_else(answer, _380054, each)), option_else('maximum-result-count', _380076, inf), option_else('initial-result-count', _380090, 10), _380102=contrl(_380076, _380054), _380120=_380122, (file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')=file(_380150), option_value(exec, skip), \+always_exec(_380030)->_380180=(skip(eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198)), deterministic(_380196)), _380120=1, !, true;_380180=(eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), deterministic(_380196), xform_out(_232198, _380254), nb_setarg(1, _379996, _380254)), !, flag(result_num, _380280, 0), _380292=eval('&self', _380030, _232198), \+ \+ (user:maplist(name_vars, []), user:name_vars('OUT'=_232198), if_t(_380120==1, writeln(' ; SKIPPING')), if_t((is_interactive(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'));_380120==1), (if_t(\+option_value(doing_repl, true), if_t(\+option_value(repl, true), if_t(option_value(prolog, true), add_history_pl(_380292)))), if_t(option_value(repl, true), add_history_src(exec(_380030))))), prolog_only(color_g_mesg('#da70d6', (write('% DEBUG:   '), writeq(_380292), writeln('.')))), true)))), system:'$restore_trace'(_380524, _380526))
^  Call: (210) [system] sig_atomic(system:'$notrace'(_380524, _380526))
^  Exit: (209) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:(reset_eval_num, res(_3362)=res(_3362), prev_result('Empty')=prev_result('Empty'), inside_assert(eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), ['include!', '&corelib', stdlib_minimal]), (is_compatio->option_else(answer, each, leap);option_else(answer, each, each)), option_else('maximum-result-count', inf, inf), option_else('initial-result-count', 10, 10), contrl(inf, each)=contrl(inf, each), _380120=_380120, (file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')=file(_380150), option_value(exec, skip), \+always_exec(['include!', '&corelib', stdlib_minimal])->(eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), deterministic(_380196), xform_out(_232198, _380254), nb_setarg(1, res(_3362), _380254))=(skip(eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198)), deterministic(_380196)), _380120=1, !, true;(eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), deterministic(_380196), xform_out(_232198, _380254), nb_setarg(1, res(_3362), _380254))=(eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), deterministic(_380196), xform_out(_232198, _380254), nb_setarg(1, res(_3362), _380254)), !, flag(result_num, 1, 0), eval('&self', ['include!', '&corelib', stdlib_minimal], _232198)=eval('&self', ['include!', '&corelib', stdlib_minimal], _232198), \+ \+ (user:maplist(name_vars, []), user:name_vars('OUT'=_232198), if_t(_380120==1, writeln(' ; SKIPPING')), if_t((is_interactive(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'));_380120==1), (if_t(\+option_value(doing_repl, true), if_t(\+option_value(repl, true), if_t(option_value(prolog, true), add_history_pl(eval('&self', ['include!', '&corelib', stdlib_minimal], _232198))))), if_t(option_value(repl, true), add_history_src(exec(['include!', '&corelib', stdlib_minimal]))))), prolog_only(color_g_mesg('#da70d6', (write('% DEBUG:   '), writeq(eval('&self', ['include!', '&corelib', stdlib_minimal], _232198)), writeln('.')))), true)))), system:'$restore_trace'(3, -1))
^  Call: (208) [user] in_answer_io(format('~N['))
^  Unify: (208) [user] in_answer_io(format('~N['))
   Call: (209) [system] nb_current(suspend_answers, true)
^  Redo: (208) [user] in_answer_io(format('~N['))
^  Unify: (208) [user] in_answer_io(format('~N['))
^  Call: (209) [user] answer_output(_412560)
^  Unify: (209) [user] answer_output(_412560)
^  Call: (210) [user] is_testing
^  Unify: (210) [user] is_testing
^  Call: (211) [user] is_metta_flag(test)
^  Unify: (211) [user] is_metta_flag(test)
^  Call: (213) [system] setup_call_cleanup('$notrace'(_418102, _418104), once(user:is_flag0(test)), '$restore_trace'(_418102, _418104))
^  Unify: (213) [system] setup_call_cleanup(system:'$notrace'(_418102, _418104), system:once(user:is_flag0(test)), system:'$restore_trace'(_418102, _418104))
^  Call: (214) [system] sig_atomic(system:'$notrace'(_418102, _418104))
^  Exit: (213) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:is_flag0(test)), system:'$restore_trace'(3, -1))
^  Exit: (211) [user] is_metta_flag(test)
^  Exit: (210) [user] is_testing
^  Call: (210) [user] original_user_output(_412560)
^  Unify: (210) [user] original_user_output(_412560)
   Call: (211) [system] stream_property(_412560, file_no(1))
   Unify: (211) [system] stream_property(_412560, file_no(1))
   Call: (212) [system] nonvar(_412560)
   Redo: (211) [system] stream_property(_412560, file_no(1))
   Unify: (211) [system] stream_property(_412560, file_no(1))
   Call: (212) [system] nonvar(_412560)
   Redo: (211) [system] stream_property(_412560, file_no(1))
   Unify: (211) [system] stream_property(_412560, file_no(1))
   Call: (212) [system] nonvar(file_no(1))
   Exit: (212) [system] nonvar(file_no(1))
   Call: (212) [system] file_no(1)=alias(_434838)
   Redo: (211) [system] stream_property(_412560, file_no(1))
   Exit: (211) [system] stream_property((0x7f675162f100), file_no(1))
^  Exit: (210) [user] original_user_output((0x7f675162f100))
^  Exit: (209) [user] answer_output((0x7f675162f100))
^  Call: (209) [user] with_output_to((0x7f675162f100), format('~N['))
   Call: (211) [$syspreds] format('~N[')
   Unify: (211) [$syspreds] format('~N[')
^  Call: (212) [$syspreds] format('~N[', [])
[
^  Exit: (212) [$syspreds] format('~N[', [])
   Exit: (211) [$syspreds] format('~N[')
^  Exit: (209) [user] with_output_to((0x7f675162f100), format('~N['))
^  Exit: (208) [user] in_answer_io(format('~N['))
   Call: (208) [user] forall_interactive(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), _446960, _380196, timed_call((eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), deterministic(_380196), xform_out(_232198, _380254), nb_setarg(1, res(_3362), _380254)), _446966), ((((_380196==true->!;true), set_option_value(interactive, _446960), contrl(inf, each)=contrl(_447036, _447038), nb_setarg(1, res(_3362), _380254), current_input(_447062), read_pending_codes(_447062, _447074, []), flag(result_num, _447088, _447088+1), flag(result_num, _447108, _447108), reset_eval_num, user_io((in_answer_io(if_t(prev_result('Empty')\=@=prev_result('Empty'), write(', '))), nb_setarg(1, prev_result('Empty'), _380254))), if_t(_447108=<_447036, ((_447108==1, _380196==true->not_compatio(format('~N~nDeterministic: ', [])), !;_380196==true->not_compatio(format('~N~nLast Result(~w): ', [_447108])), !;not_compatio(format('~N~nNDet Result(~w): ', [_447108]))), ignore((not_compatio(if_t(\+symbolic(_380254), nop(nl))), user_io(with_indents(is_mettalog, color_g_mesg_ok('yellow', \+ \+ (maplist(maybe_assign, []), not_compatio(write_bsrc(_380254)), true)))))))), in_answer_io(write_asrc(_380254)), not_compatio(format('~N')), (_380196\==true, _446960, _447038\==leap, 10>_447108, _447108<_447036->_447470=true;_447470=false), if_t((_447470==true;_380196==true), if_trace(time, color_g_mesg_ok('yellow', user_io(give_time('Execution', _446966))))), color_g_mesg('green', ignore(([]\=@=[]->not_compatio((reverse([], _447574), maplist(print_var, _447574), nop(nl)));true)))), (_447470==true->write("~npress ';' for more solutions "), get_single_char_key(_447636), not_compatio((writeq(key=_447636), nl)), (_447636==b->once(repl), fail;_447636==m->make;_447636==t->nop(set_debug(eval, true)), rtrace;_447636=='T'->set_debug(eval, true);_447636==(;)->true;_447636==esc('[A', [27, 91, 65])->nb_setarg(2, contrl(inf, each), leap);_447636=='L'->nb_setarg(1, contrl(inf, each), _447108);_447636==l->nb_setarg(2, contrl(inf, each), leap);(_447636=='\n';_447636=='\r')->!, fail;!, fail));_380196\==true, \+_446960, contrl(inf, each)=contrl(_447036, leap)->true;_380196==true->!;true), format('~N~n')))
   Unify: (208) [user] forall_interactive(file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), false, _380196, timed_call((eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), deterministic(_380196), xform_out(_232198, _380254), nb_setarg(1, res(_3362), _380254)), _446966), ((((_380196==true->!;true), set_option_value(interactive, false), contrl(inf, each)=contrl(_447036, _447038), nb_setarg(1, res(_3362), _380254), current_input(_447062), read_pending_codes(_447062, _447074, []), flag(result_num, _447088, _447088+1), flag(result_num, _447108, _447108), reset_eval_num, user_io((in_answer_io(if_t(prev_result('Empty')\=@=prev_result('Empty'), write(', '))), nb_setarg(1, prev_result('Empty'), _380254))), if_t(_447108=<_447036, ((_447108==1, _380196==true->not_compatio(format('~N~nDeterministic: ', [])), !;_380196==true->not_compatio(format('~N~nLast Result(~w): ', [_447108])), !;not_compatio(format('~N~nNDet Result(~w): ', [_447108]))), ignore((not_compatio(if_t(\+symbolic(_380254), nop(nl))), user_io(with_indents(is_mettalog, color_g_mesg_ok('yellow', \+ \+ (maplist(maybe_assign, []), not_compatio(write_bsrc(_380254)), true)))))))), in_answer_io(write_asrc(_380254)), not_compatio(format('~N')), (_380196\==true, false, _447038\==leap, 10>_447108, _447108<_447036->_447470=true;_447470=false), if_t((_447470==true;_380196==true), if_trace(time, color_g_mesg_ok('yellow', user_io(give_time('Execution', _446966))))), color_g_mesg('green', ignore(([]\=@=[]->not_compatio((reverse([], _447574), maplist(print_var, _447574), nop(nl)));true)))), (_447470==true->write("~npress ';' for more solutions "), get_single_char_key(_447636), not_compatio((writeq(key=_447636), nl)), (_447636==b->once(repl), fail;_447636==m->make;_447636==t->nop(set_debug(eval, true)), rtrace;_447636=='T'->set_debug(eval, true);_447636==(;)->true;_447636==esc('[A', [27, 91, 65])->nb_setarg(2, contrl(inf, each), leap);_447636=='L'->nb_setarg(1, contrl(inf, each), _447108);_447636==l->nb_setarg(2, contrl(inf, each), leap);(_447636=='\n';_447636=='\r')->!, fail;!, fail));_380196\==true, \+false, contrl(inf, each)=contrl(_447036, leap)->true;_380196==true->!;true), format('~N~n')))
   Call: (209) [user] timed_call((eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), deterministic(_380196), xform_out(_232198, _380254), nb_setarg(1, res(_3362), _380254)), _446966)
   Unify: (209) [user] timed_call((eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), deterministic(_380196), xform_out(_232198, _380254), nb_setarg(1, res(_3362), _380254)), _446966)
   Call: (210) [system] statistics(cputime, _460222)
   Exit: (210) [system] statistics(cputime, 12.413580467)
   Call: (210) [user] rtrace_this((eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), deterministic(_380196), xform_out(_232198, _380254), nb_setarg(1, res(_3362), _380254)))
   Unify: (210) [user] rtrace_this((eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), deterministic(_380196), xform_out(_232198, _380254), nb_setarg(1, res(_3362), _380254)))
^  Call: (211) [user] option_value(rtrace, true)
^  Unify: (211) [user] option_value(rtrace, true)
   Call: (212) [system] var(true)
   Fail: (212) [system] var(true)
^  Redo: (211) [user] option_value(rtrace, true)
^  Unify: (211) [user] option_value(rtrace, true)
   Call: (212) [system] true==true
   Exit: (212) [system] true==true
^  Call: (212) [user] option_value0(rtrace, 'True')
^  Unify: (212) [user] option_value0(rtrace, 'True')
^  Call: (213) [user] was_option_value(rtrace, _473182)
^  Unify: (213) [user] was_option_value(rtrace, _473182)
   Call: (214) [system] current_prolog_flag(rtrace, _475040)
   Fail: (214) [system] current_prolog_flag(rtrace, _475040)
^  Redo: (213) [user] was_option_value(rtrace, _473182)
^  Unify: (213) [user] was_option_value(rtrace, _473182)
   Call: (214) [$syspreds] prolog_load_context(rtrace, _478754)
   Fail: (214) [$syspreds] prolog_load_context(rtrace, _478754)
^  Redo: (213) [user] was_option_value(rtrace, _473182)
^  Unify: (213) [user] was_option_value(rtrace, _473182)
   Call: (214) [system] nb_current(rtrace, _482468)
   Fail: (214) [system] nb_current(rtrace, _482468)
^  Fail: (213) [user] was_option_value(rtrace, _473182)
^  Redo: (212) [user] option_value0(rtrace, 'True')
^  Fail: (212) [user] option_value0(rtrace, 'True')
^  Redo: (211) [user] option_value(rtrace, true)
^  Unify: (211) [user] option_value(rtrace, true)
   Call: (212) [system] true==false
   Fail: (212) [system] true==false
^  Redo: (211) [user] option_value(rtrace, true)
^  Unify: (211) [user] option_value(rtrace, true)
^  Call: (213) [system] setup_call_cleanup('$notrace'(_492692, _492694), once(user:option_value0(rtrace, true)), '$restore_trace'(_492692, _492694))
^  Unify: (213) [system] setup_call_cleanup(system:'$notrace'(_492692, _492694), system:once(user:option_value0(rtrace, true)), system:'$restore_trace'(_492692, _492694))
^  Call: (214) [system] sig_atomic(system:'$notrace'(_492692, _492694))
^  Fail: (211) [user] option_value(rtrace, true)
   Redo: (210) [user] rtrace_this((eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), deterministic(_380196), xform_out(_232198, _380254), nb_setarg(1, res(_3362), _380254)))
   Unify: (210) [user] rtrace_this((eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _232198), deterministic(_380196), xform_out(_232198, _380254), nb_setarg(1, res(_3362), _380254)))
^  Call: (211) [user] is_debugging(rtrace)
^  Unify: (211) [user] is_debugging(rtrace)
   Call: (212) [system] var(rtrace)
   Fail: (212) [system] var(rtrace)
^  Redo: (211) [user] is_debugging(rtrace)
^  Unify: (211) [user] is_debugging(rtrace)
   Call: (212) [system] rtrace==false
   Fail: (212) [system] rtrace==false
^  Redo: (211) [user] is_debugging(rtrace)
^  Unify: (211) [user] is_debugging(rtrace)
   Call: (212) [system] rtrace==true
   Fail: (212) [system] rtrace==true
^  Redo: (211) [user] is_debugging(rtrace)
^  Unify: (211) [user] is_debugging(rtrace)
^  Call: (212) [user] fast_option_value(rtrace, debug)
^  Unify: (212) [user] fast_option_value(rtrace, debug)
   Call: (213) [system] atom(rtrace)
   Exit: (213) [system] atom(rtrace)
   Call: (213) [system] current_prolog_flag(rtrace, debug)
   Fail: (213) [system] current_prolog_flag(rtrace, debug)
^  Fail: (212) [user] fast_option_value(rtrace, debug)
^  Redo: (211) [user] is_debugging(rtrace)
^  Unify: (211) [user] is_debugging(rtrace)
^  Call: (212) [user] fast_option_value(rtrace, trace)
^  Unify: (212) [user] fast_option_value(rtrace, trace)
   Call: (213) [system] atom(rtrace)
   Exit: (213) [system] atom(rtrace)
   Call: (213) [system] current_prolog_flag(rtrace, trace)
   Fail: (213) [system] current_prolog_flag(rtrace, trace)
^  Fail: (212) [user] fast_option_value(rtrace, trace)
^  Redo: (211) [user] is_debugging(rtrace)
^  Unify: (211) [user] is_debugging(rtrace)
   Call: (212) [prolog_debug] prolog_debug:debugging(metta(rtrace), _8928)
   Unify: (212) [prolog_debug] prolog_debug:debugging(metta(rtrace), _8928)
^  Call: (213) [prolog_debug] prolog_debug:debugging(metta(rtrace), _8928, _10864)
^  Unify: (213) [prolog_debug] prolog_debug:debugging(metta(rtrace), _8928, [])
   Call: (214) [system] current_prolog_flag(nodebugx, true)
^  Redo: (213) [prolog_debug] prolog_debug:debugging(metta(rtrace), _8928, _13668)
^  Unify: (213) [prolog_debug] prolog_debug:debugging(metta(rtrace), _8928, _14606)
^  Call: (214) [prolog_debug] current_predicate(debugging_logicmoo_setting/3)
^  Exit: (214) [prolog_debug] current_predicate(debugging_logicmoo_setting/3)
^  Call: (214) [prolog_debug] predicate_property(bugger:debugging_logicmoo_setting(_17340, _17342, _17344), defined)
^  Unify: (214) [$syspreds] predicate_property(bugger:debugging_logicmoo_setting(_17340, _17342, _17344), defined)
   Call: (215) [system] nonvar(defined)
   Exit: (215) [system] nonvar(defined)
   Call: (215) [$syspreds] property_predicate(defined, bugger:debugging_logicmoo_setting(_17340, _17342, _17344))
   Unify: (215) [$syspreds] property_predicate(defined, bugger:debugging_logicmoo_setting(_17340, _17342, _17344))
   Call: (216) [$syspreds] define_or_generate(bugger:debugging_logicmoo_setting(_17340, _17342, _17344))
   Unify: (216) [$syspreds] define_or_generate(bugger:debugging_logicmoo_setting(_17340, _17342, _17344))
   Call: (217) [system] callable(debugging_logicmoo_setting(_17340, _17342, _17344))
   Exit: (217) [system] callable(debugging_logicmoo_setting(_17340, _17342, _17344))
   Call: (217) [system] atom(bugger)
   Exit: (217) [system] atom(bugger)
   Exit: (216) [$syspreds] define_or_generate(bugger:debugging_logicmoo_setting(_17340, _17342, _17344))
   Exit: (215) [$syspreds] property_predicate(defined, bugger:debugging_logicmoo_setting(_17340, _17342, _17344))
^  Exit: (214) [$syspreds] predicate_property(bugger:debugging_logicmoo_setting(_17340, _17342, _17344), defined)
^  Call: (214) [prolog_debug] bugger:debugging_logicmoo_setting(metta(rtrace), _8928, _31254)
^  Unify: (214) [prolog_debug] bugger:debugging_logicmoo_setting(metta(rtrace), true, [user_error])
^  Exit: (214) [prolog_debug] bugger:debugging_logicmoo_setting(metta(rtrace), true, [user_error])
^  Exit: (213) [prolog_debug] prolog_debug:debugging(metta(rtrace), true, [user_error])
   Exit: (212) [prolog_debug] prolog_debug:debugging(metta(rtrace), true)
   Call: (212) [system] true==true
   Exit: (212) [system] true==true
^  Exit: (211) [user] is_debugging(rtrace)
   Exit: (210) [user] rtrace_this((eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _3494), deterministic(_3774), xform_out(_3494, _3802), nb_setarg(1, res(_3362), _3802)))
^  Call: (211) [rtrace] bugger:scce_orig(restart_rtrace, user:(eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _3494), deterministic(_3774), xform_out(_3494, _3802), nb_setarg(1, res(_3362), _3802)), tAt_rtrace)
^  Unify: (211) [bugger] bugger:scce_orig(rtrace:restart_rtrace, user:(eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _3494), deterministic(_3774), xform_out(_3494, _3802), nb_setarg(1, res(_3362), _3802)), rtrace:tAt_rtrace)
   Call: (212) [system] _41714=mquietly_if(true, rtrace:tAt_rtrace)
   Exit: (212) [system] mquietly_if(true, rtrace:tAt_rtrace)=mquietly_if(true, rtrace:tAt_rtrace)
^  Call: (212) [bugger] setup_call_cleanup(rtrace:restart_rtrace, ((user:(eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _3494), deterministic(_3774), xform_out(_3494, _3802), nb_setarg(1, res(_3362), _3802)), deterministic(_43592)), (notrace(_43592==true)->!;rtrace:tAt_rtrace, notrace(nb_setarg(1, mquietly_if(true, rtrace:tAt_rtrace), false));rtrace:restart_rtrace, notrace(nb_setarg(1, mquietly_if(true, rtrace:tAt_rtrace), true)), notrace(fail))), mquietly_if(true, rtrace:tAt_rtrace))
^  Unify: (212) [system] setup_call_cleanup(rtrace:restart_rtrace, bugger:((user:(eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _3494), deterministic(_3774), xform_out(_3494, _3802), nb_setarg(1, res(_3362), _3802)), deterministic(_43592)), (notrace(_43592==true)->!;rtrace:tAt_rtrace, notrace(nb_setarg(1, mquietly_if(true, rtrace:tAt_rtrace), false));rtrace:restart_rtrace, notrace(nb_setarg(1, mquietly_if(true, rtrace:tAt_rtrace), true)), notrace(fail))), bugger:mquietly_if(true, rtrace:tAt_rtrace))
^  Call: (213) [system] sig_atomic(rtrace:restart_rtrace)
^  Call: (216) [rtrace] rtrace:restart_rtrace1
^  Unify: (216) [rtrace] rtrace:restart_rtrace1
^  Exit: (216) [rtrace] rtrace:restart_rtrace1
^  Exit: (213) [system] sig_atomic(rtrace:restart_rtrace)
   Call: (214) [user] eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
   Unify: (214) [user] eval_H(500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
^  Call: (215) [user] catch_metta_return(eval_args(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494), _3494)
^  Unify: (215) [user] catch_metta_return(eval_args(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494), _3494)
^  Call: (217) [user] eval_args(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
^  Unify: (217) [user] eval_args(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
   Call: (218) [system] var(['include!', '&corelib', stdlib_minimal])
^  Redo: (217) [user] eval_args(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
^  Unify: (217) [user] eval_args(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
^  Call: (219) [system] setup_call_cleanup('$notrace'(_58972, _58974), once(user:self_eval(['include!', '&corelib', stdlib_minimal])), '$restore_trace'(_58972, _58974))
^  Unify: (219) [system] setup_call_cleanup(system:'$notrace'(_58972, _58974), system:once(user:self_eval(['include!', '&corelib', stdlib_minimal])), system:'$restore_trace'(_58972, _58974))
^  Call: (220) [system] sig_atomic(system:'$notrace'(_58972, _58974))
^  Redo: (217) [user] eval_args(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
^  Unify: (217) [user] eval_args(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
^  Call: (219) [system] setup_call_cleanup('$notrace'(_63710, _63712), once(user:nonvar(_3494)), '$restore_trace'(_63710, _63712))
^  Unify: (219) [system] setup_call_cleanup(system:'$notrace'(_63710, _63712), system:once(user:nonvar(_3494)), system:'$restore_trace'(_63710, _63712))
^  Call: (220) [system] sig_atomic(system:'$notrace'(_63710, _63712))
^  Redo: (217) [user] eval_args(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
^  Unify: (217) [user] eval_args(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
^  Call: (219) [system] setup_call_cleanup('$notrace'(_68448, _68450), once(user:nonvar(_3494)), '$restore_trace'(_68448, _68450))
^  Unify: (219) [system] setup_call_cleanup(system:'$notrace'(_68448, _68450), system:once(user:nonvar(_3494)), system:'$restore_trace'(_68448, _68450))
^  Call: (220) [system] sig_atomic(system:'$notrace'(_68448, _68450))
^  Redo: (217) [user] eval_args(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
^  Unify: (217) [user] eval_args(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
   Call: (218) [system] ['&corelib', stdlib_minimal]==[]
^  Redo: (217) [user] eval_args(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
^  Unify: (217) [user] eval_args(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
   Call: (218) [system] atom(=)
   Exit: (218) [system] atom(=)
   Call: (218) [system] (=)\==(=)
^  Redo: (217) [user] eval_args(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
^  Unify: (217) [user] eval_args(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
^  Call: (218) [user] self_eval(['include!', '&corelib', stdlib_minimal])
^  Unify: (218) [user] self_eval(['include!', '&corelib', stdlib_minimal])
^  Call: (220) [system] setup_call_cleanup('$notrace'(_82514, _82516), once(user:self_eval0(['include!', '&corelib', stdlib_minimal])), '$restore_trace'(_82514, _82516))
^  Unify: (220) [system] setup_call_cleanup(system:'$notrace'(_82514, _82516), system:once(user:self_eval0(['include!', '&corelib', stdlib_minimal])), system:'$restore_trace'(_82514, _82516))
^  Call: (221) [system] sig_atomic(system:'$notrace'(_82514, _82516))
^  Fail: (218) [user] self_eval(['include!', '&corelib', stdlib_minimal])
^  Redo: (217) [user] eval_args(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
^  Unify: (217) [user] eval_args(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
^  Call: (218) [user] eval_00(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
^  Unify: (218) [user] eval_00(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
^  Call: (219) [user] self_eval(['include!', '&corelib', stdlib_minimal])
^  Unify: (219) [user] self_eval(['include!', '&corelib', stdlib_minimal])
^  Call: (221) [system] setup_call_cleanup('$notrace'(_91912, _91914), once(user:self_eval0(['include!', '&corelib', stdlib_minimal])), '$restore_trace'(_91912, _91914))
^  Unify: (221) [system] setup_call_cleanup(system:'$notrace'(_91912, _91914), system:once(user:self_eval0(['include!', '&corelib', stdlib_minimal])), system:'$restore_trace'(_91912, _91914))
^  Call: (222) [system] sig_atomic(system:'$notrace'(_91912, _91914))
^  Fail: (219) [user] self_eval(['include!', '&corelib', stdlib_minimal])
^  Redo: (218) [user] eval_00(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
^  Unify: (218) [user] eval_00(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
^  Call: (219) [user] eval_01(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
^  Unify: (219) [user] eval_01(=, _52366, 500, '&self', ['include!', '&corelib', stdlib_minimal], _3494)
^  Call: (220) [user] if_t((500<1, trace_on_overflow), debug(metta(eval_args)))
^  Unify: (220) [user] if_t((500<1, trace_on_overflow), debug(metta(eval_args)))
   Call: (222) [system] 500<1
   Fail: (222) [system] 500<1
^  Redo: (220) [user] if_t((500<1, trace_on_overflow), debug(metta(eval_args)))
^  Exit: (220) [user] if_t((500<1, trace_on_overflow), debug(metta(eval_args)))
^  Call: (221) [system] setup_call_cleanup('$notrace'(_105070, _105072), once(user:(_105046 is 500-1, copy_term(['include!', '&corelib', stdlib_minimal], _105060))), '$restore_trace'(_105070, _105072))
^  Unify: (221) [system] setup_call_cleanup(system:'$notrace'(_105070, _105072), system:once(user:(_105046 is 500-1, copy_term(['include!', '&corelib', stdlib_minimal], _105060))), system:'$restore_trace'(_105070, _105072))
^  Call: (222) [system] sig_atomic(system:'$notrace'(_105070, _105072))
^  Exit: (221) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:(499 is 500-1, copy_term(['include!', '&corelib', stdlib_minimal], ['include!', '&corelib', stdlib_minimal]))), system:'$restore_trace'(3, -1))
^  Call: (220) [user] trace_eval(eval_20(=, _52366), e, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
^  Unify: (220) [user] trace_eval(eval_20(=, _52366), e, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
^  Call: (221) [user] must_det_ll((notrace((flag(eval_num, _110764, _110764+1), _110782 is _110764 mod 500, _110800 is 99-499 mod 100, _110824=_110826, option_else('trace-length', _110838, 500), option_else('trace-depth', _110846, 30))), quietly(if_t((nop(stop_rtrace), _110782>_110838), (set_debug(eval, false), _110902 is _110838+1, nop(format('; Switched off tracing. For a longer trace: !(pragma! trace-length ~w)', [_110902])), nop((start_rtrace, rtrace))))), nop(notrace(no_repeats_var(_110954)))))
^  Unify: (221) [user] must_det_ll(user:(notrace((flag(eval_num, _110764, _110764+1), _110782 is _110764 mod 500, _110800 is 99-499 mod 100, _110824=_110826, option_else('trace-length', _110838, 500), option_else('trace-depth', _110846, 30))), quietly(if_t((nop(stop_rtrace), _110782>_110838), (set_debug(eval, false), _110902 is _110838+1, nop(format('; Switched off tracing. For a longer trace: !(pragma! trace-length ~w)', [_110902])), nop((start_rtrace, rtrace))))), nop(notrace(no_repeats_var(_110954)))))
^  Call: (222) [user] once(user:(notrace((flag(eval_num, _110764, _110764+1), _110782 is _110764 mod 500, _110800 is 99-499 mod 100, _110824=_110826, option_else('trace-length', _110838, 500), option_else('trace-depth', _110846, 30))), quietly(if_t((nop(stop_rtrace), _110782>_110838), (set_debug(eval, false), _110902 is _110838+1, nop(format('; Switched off tracing. For a longer trace: !(pragma! trace-length ~w)', [_110902])), nop((start_rtrace, rtrace))))), nop(notrace(no_repeats_var(_110954)))))
^  Unify: (222) [system] once(user:(notrace((flag(eval_num, _110764, _110764+1), _110782 is _110764 mod 500, _110800 is 99-499 mod 100, _110824=_110826, option_else('trace-length', _110838, 500), option_else('trace-depth', _110846, 30))), quietly(if_t((nop(stop_rtrace), _110782>_110838), (set_debug(eval, false), _110902 is _110838+1, nop(format('; Switched off tracing. For a longer trace: !(pragma! trace-length ~w)', [_110902])), nop((start_rtrace, rtrace))))), nop(notrace(no_repeats_var(_110954)))))
^  Call: (225) [system] setup_call_cleanup('$notrace'(_114678, _114680), once(user:(flag(eval_num, _110764, _110764+1), _110782 is _110764 mod 500, _110800 is 99-499 mod 100, _110824=_110826, option_else('trace-length', _110838, 500), option_else('trace-depth', _110846, 30))), '$restore_trace'(_114678, _114680))
^  Unify: (225) [system] setup_call_cleanup(system:'$notrace'(_114678, _114680), system:once(user:(flag(eval_num, _110764, _110764+1), _110782 is _110764 mod 500, _110800 is 99-499 mod 100, _110824=_110826, option_else('trace-length', _110838, 500), option_else('trace-depth', _110846, 30))), system:'$restore_trace'(_114678, _114680))
^  Call: (226) [system] sig_atomic(system:'$notrace'(_114678, _114680))
^  Exit: (225) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:(flag(eval_num, 0, 0+1), 0 is 0 mod 500, 0 is 99-499 mod 100, _110824=_110824, option_else('trace-length', 500, 500), option_else('trace-depth', 30, 30))), system:'$restore_trace'(3, -1))
^  Call: (225) [rtrace] rtrace:quietly3(user:if_t((nop(stop_rtrace), 0>500), (set_debug(eval, false), _110902 is 500+1, nop(format('; Switched off tracing. For a longer trace: !(pragma! trace-length ~w)', [_110902])), nop((start_rtrace, rtrace)))))
^  Unify: (225) [rtrace] rtrace:quietly3(user:if_t((nop(stop_rtrace), 0>500), (set_debug(eval, false), _110902 is 500+1, nop(format('; Switched off tracing. For a longer trace: !(pragma! trace-length ~w)', [_110902])), nop((start_rtrace, rtrace)))))
^  Exit: (225) [rtrace] rtrace:quietly3(user:if_t((nop(stop_rtrace), 0>500), (set_debug(eval, false), _110902 is 500+1, nop(format('; Switched off tracing. For a longer trace: !(pragma! trace-length ~w)', [_110902])), nop((start_rtrace, rtrace)))))
   Call: (224) [user] nop(notrace(no_repeats_var(_110954)))
   Unify: (224) [user] nop(notrace(no_repeats_var(_110954)))
   Exit: (224) [user] nop(notrace(no_repeats_var(_110954)))
^  Exit: (222) [system] once(user:(notrace((flag(eval_num, 0, 0+1), 0 is 0 mod 500, 0 is 99-499 mod 100, _110824=_110824, option_else('trace-length', 500, 500), option_else('trace-depth', 30, 30))), quietly(if_t((nop(stop_rtrace), 0>500), (set_debug(eval, false), _110902 is 500+1, nop(format('; Switched off tracing. For a longer trace: !(pragma! trace-length ~w)', [_110902])), nop((start_rtrace, rtrace))))), nop(notrace(no_repeats_var(_110954)))))
^  Exit: (221) [user] must_det_ll(user:(notrace((flag(eval_num, 0, 0+1), 0 is 0 mod 500, 0 is 99-499 mod 100, _110824=_110824, option_else('trace-length', 500, 500), option_else('trace-depth', 30, 30))), quietly(if_t((nop(stop_rtrace), 0>500), (set_debug(eval, false), _110902 is 500+1, nop(format('; Switched off tracing. For a longer trace: !(pragma! trace-length ~w)', [_110902])), nop((start_rtrace, rtrace))))), nop(notrace(no_repeats_var(_110954)))))
   Call: (221) [occurs] occurs:sub_term(_126142, e)
   Unify: (221) [occurs] occurs:sub_term(e, e)
   Exit: (221) [occurs] occurs:sub_term(e, e)
   Call: (221) [system] e\=e
   Fail: (221) [system] e\=e
   Redo: (221) [occurs] occurs:sub_term(_126142, e)
   Unify: (221) [occurs] occurs:sub_term(_126142, e)
   Call: (222) [system] compound(e)
   Fail: (222) [system] compound(e)
   Fail: (221) [occurs] occurs:sub_term(_126142, e)
^  Redo: (220) [user] trace_eval(eval_20(=, _52366), e, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
   Call: (221) [system] _136360=e
   Exit: (221) [system] e=e
^  Call: (221) [user] if_trace((eval;e), (_110824=1, indentq(0, 0, -->, [e, ['include!', '&corelib', stdlib_minimal]])))
^  Unify: (221) [user] if_trace((eval;e), (_110824=1, indentq(0, 0, -->, [e, ['include!', '&corelib', stdlib_minimal]])))
^  Call: (223) [system] setup_call_cleanup('$notrace'(_140164, _140166), once(user:real_notrace(catch_err(ignore((is_debugging((eval;e)), _110824=1, indentq(0, 0, -->, [e, ['include!', '&corelib', stdlib_minimal]]))), _140122, fbug((_140122-->if_trace((eval;e), (_110824=1, indentq(0, 0, -->, [e, ['include!', '&corelib', stdlib_minimal]])))))))), '$restore_trace'(_140164, _140166))
^  Unify: (223) [system] setup_call_cleanup(system:'$notrace'(_140164, _140166), system:once(user:real_notrace(catch_err(ignore((is_debugging((eval;e)), _110824=1, indentq(0, 0, -->, [e, ['include!', '&corelib', stdlib_minimal]]))), _140122, fbug((_140122-->if_trace((eval;e), (_110824=1, indentq(0, 0, -->, [e, ['include!', '&corelib', stdlib_minimal]])))))))), system:'$restore_trace'(_140164, _140166))
^  Call: (224) [system] sig_atomic(system:'$notrace'(_140164, _140166))
^  Exit: (223) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:real_notrace(catch_err(ignore((is_debugging((eval;e)), _110824=1, indentq(0, 0, -->, [e, ['include!', '&corelib', stdlib_minimal]]))), _140122, fbug((_140122-->if_trace((eval;e), (_110824=1, indentq(0, 0, -->, [e, ['include!', '&corelib', stdlib_minimal]])))))))), system:'$restore_trace'(3, -1))
^  Exit: (221) [user] if_trace((eval;e), (_110824=1, indentq(0, 0, -->, [e, ['include!', '&corelib', stdlib_minimal]])))
   Call: (221) [system] _144946=retval(fail)
   Exit: (221) [system] retval(fail)=retval(fail)
   Call: (221) [system] _146808=(\+ \+ (flag(eval_num, _146828, _146828+1), (retval(fail)\=@=retval(fail), nonvar(_108854)->indentq(0, _146828, <--, [e, _108854]);indentq(0, _146828, <--, [e, retval(fail)]))))
   Exit: (221) [system] (\+ \+ (flag(eval_num, _146828, _146828+1), (retval(fail)\=@=retval(fail), nonvar(_108854)->indentq(0, _146828, <--, [e, _108854]);indentq(0, _146828, <--, [e, retval(fail)]))))=(\+ \+ (flag(eval_num, _146828, _146828+1), (retval(fail)\=@=retval(fail), nonvar(_108854)->indentq(0, _146828, <--, [e, _108854]);indentq(0, _146828, <--, [e, retval(fail)]))))
^  Call: (221) [user] call_cleanup(((call(eval_20(=, _52366), 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)*->nb_setarg(1, retval(fail), _108854);fail, trace, call(eval_20(=, _52366), 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)), ignore(notrace((\+_108854\=_110954, nb_setarg(1, retval(fail), _108854))))), ignore((_110824==1->ignore(\+ \+ (flag(eval_num, _146828, _146828+1), (retval(fail)\=@=retval(fail), nonvar(_108854)->indentq(0, _146828, <--, [e, _108854]);indentq(0, _146828, <--, [e, retval(fail)]))));notrace(ignore(if_t(0<30, if_trace((eval;e), ignore(\+ \+ (flag(eval_num, _146828, _146828+1), (retval(fail)\=@=retval(fail), nonvar(_108854)->indentq(0, _146828, <--, [e, _108854]);indentq(0, _146828, <--, [e, retval(fail)])))))))))))
^  Unify: (221) [system] call_cleanup(user:((call(eval_20(=, _52366), 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)*->nb_setarg(1, retval(fail), _108854);fail, trace, call(eval_20(=, _52366), 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)), ignore(notrace((\+_108854\=_110954, nb_setarg(1, retval(fail), _108854))))), user:ignore((_110824==1->ignore(\+ \+ (flag(eval_num, _146828, _146828+1), (retval(fail)\=@=retval(fail), nonvar(_108854)->indentq(0, _146828, <--, [e, _108854]);indentq(0, _146828, <--, [e, retval(fail)]))));notrace(ignore(if_t(0<30, if_trace((eval;e), ignore(\+ \+ (flag(eval_num, _146828, _146828+1), (retval(fail)\=@=retval(fail), nonvar(_108854)->indentq(0, _146828, <--, [e, _108854]);indentq(0, _146828, <--, [e, retval(fail)])))))))))))
^  Call: (223) [user] eval_20(=, _52366, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
^  Unify: (223) [user] eval_20(=, _52366, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
   Call: (224) [system] atom(['include!', '&corelib', stdlib_minimal])
^  Redo: (223) [user] eval_20(=, _52366, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
^  Unify: (223) [user] eval_20(=, _52366, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
^  Call: (224) [user] no_eval(['include!', '&corelib', stdlib_minimal])
^  Unify: (224) [user] no_eval(['include!', '&corelib', stdlib_minimal])
^  Call: (225) [user] self_eval(['include!', '&corelib', stdlib_minimal])
^  Unify: (225) [user] self_eval(['include!', '&corelib', stdlib_minimal])
^  Call: (227) [system] setup_call_cleanup('$notrace'(_159214, _159216), once(user:self_eval0(['include!', '&corelib', stdlib_minimal])), '$restore_trace'(_159214, _159216))
^  Unify: (227) [system] setup_call_cleanup(system:'$notrace'(_159214, _159216), system:once(user:self_eval0(['include!', '&corelib', stdlib_minimal])), system:'$restore_trace'(_159214, _159216))
^  Call: (228) [system] sig_atomic(system:'$notrace'(_159214, _159216))
^  Fail: (225) [user] self_eval(['include!', '&corelib', stdlib_minimal])
^  Redo: (224) [user] no_eval(['include!', '&corelib', stdlib_minimal])
^  Unify: (224) [user] no_eval(['include!', '&corelib', stdlib_minimal])
   Call: (225) [system] atomic('include!')
   Exit: (225) [system] atomic('include!')
^  Call: (225) [user] is_sl('include!')
^  Unify: (225) [user] is_sl('include!')
   Call: (226) [system] number('include!')
^  Redo: (223) [user] eval_20(=, _52366, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
^  Unify: (223) [user] eval_20(=, _52366, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
   Call: (224) [system] ['&corelib', stdlib_minimal]==[]
^  Redo: (223) [user] eval_20(=, _52366, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
^  Unify: (223) [user] eval_20(=, _52366, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
   Call: (224) [system] atom(=)
   Exit: (224) [system] atom(=)
   Call: (224) [system] (=)\==(=)
^  Redo: (223) [user] eval_20(=, _52366, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
^  Unify: (223) [user] eval_20(=, _52366, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
   Call: (224) [system] callable('include!')
   Exit: (224) [system] callable('include!')
^  Unify: (223) [user] eval_20(=, _52366, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
   Call: (224) [system] is_list(['&corelib', stdlib_minimal])
   Exit: (224) [system] is_list(['&corelib', stdlib_minimal])
^  Unify: (223) [user] eval_20(=, _52366, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
   Call: (224) [system] is_list(['include!', '&corelib', stdlib_minimal])
   Exit: (224) [system] is_list(['include!', '&corelib', stdlib_minimal])
^  Unify: (223) [user] eval_20(=, _52366, 499, '&self', ['include!', '&corelib', stdlib_minimal], ['include!'|_186248])
   Call: (224) [system] var('include!')
^  Redo: (223) [user] eval_20(=, _52366, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
^  Unify: (223) [user] eval_20(=, _52366, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
^  Call: (224) [user] once(expand_eval(['include!', '&corelib', stdlib_minimal], _190010))
^  Unify: (224) [system] once(user:expand_eval(['include!', '&corelib', stdlib_minimal], _190010))
^  Call: (225) [user] expand_eval(['include!', '&corelib', stdlib_minimal], _190010)
^  Unify: (225) [user] expand_eval(['include!', '&corelib', stdlib_minimal], _190010)
   Call: (226) [system] is_list(['include!', '&corelib', stdlib_minimal])
   Exit: (226) [system] is_list(['include!', '&corelib', stdlib_minimal])
^  Unify: (225) [user] expand_eval(['include!', '&corelib', stdlib_minimal], ['include!'|_195586])
   Call: (226) [system] ground('include!')
   Exit: (226) [system] ground('include!')
^  Unify: (225) [user] expand_eval(['include!', '&corelib', stdlib_minimal], ['include!'|_198368])
^  Call: (226) [user] apply:maplist(expand_eval, ['&corelib', stdlib_minimal], _198368)
^  Unify: (226) [apply] apply:maplist(user:expand_eval, ['&corelib', stdlib_minimal], _198368)
   Call: (227) [apply] apply:maplist_(['&corelib', stdlib_minimal], _198368, user:expand_eval)
   Unify: (227) [apply] apply:maplist_(['&corelib', stdlib_minimal], [_202114|_202116], user:expand_eval)
^  Call: (228) [user] expand_eval('&corelib', _202114)
^  Unify: (228) [user] expand_eval('&corelib', _202114)
   Call: (229) [system] is_list('&corelib')
^  Redo: (228) [user] expand_eval('&corelib', _202114)
   Call: (229) [system] '&corelib'=_202114
   Exit: (229) [system] '&corelib'='&corelib'
^  Exit: (228) [user] expand_eval('&corelib', '&corelib')
   Call: (228) [apply] apply:maplist_([stdlib_minimal], _202116, user:expand_eval)
   Unify: (228) [apply] apply:maplist_([stdlib_minimal], [_210476|_210478], user:expand_eval)
^  Call: (229) [user] expand_eval(stdlib_minimal, _210476)
^  Unify: (229) [user] expand_eval(stdlib_minimal, _210476)
   Call: (230) [system] is_list(stdlib_minimal)
^  Redo: (229) [user] expand_eval(stdlib_minimal, _210476)
   Call: (230) [system] stdlib_minimal=_210476
   Exit: (230) [system] stdlib_minimal=stdlib_minimal
^  Exit: (229) [user] expand_eval(stdlib_minimal, stdlib_minimal)
   Call: (229) [apply] apply:maplist_([], _210478, user:expand_eval)
   Unify: (229) [apply] apply:maplist_([], [], user:expand_eval)
   Exit: (229) [apply] apply:maplist_([], [], user:expand_eval)
   Exit: (228) [apply] apply:maplist_([stdlib_minimal], [stdlib_minimal], user:expand_eval)
   Exit: (227) [apply] apply:maplist_(['&corelib', stdlib_minimal], ['&corelib', stdlib_minimal], user:expand_eval)
^  Exit: (226) [apply] apply:maplist(user:expand_eval, ['&corelib', stdlib_minimal], ['&corelib', stdlib_minimal])
^  Exit: (225) [user] expand_eval(['include!', '&corelib', stdlib_minimal], ['include!', '&corelib', stdlib_minimal])
^  Exit: (224) [system] once(user:expand_eval(['include!', '&corelib', stdlib_minimal], ['include!', '&corelib', stdlib_minimal]))
   Call: (224) [system] ['include!', '&corelib', stdlib_minimal]\==['include!', '&corelib', stdlib_minimal]
^  Redo: (223) [user] eval_20(=, _52366, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
^  Unify: (223) [user] eval_20(=, _52366, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
^  Call: (224) [user] is_progn('include!')
^  Unify: (224) [user] is_progn('include!')
   Call: (225) [system] var('include!')
^  Redo: (223) [user] eval_20(=, _52366, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
^  Unify: (223) [user] eval_20(=, _52366, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
^  Call: (224) [user] is_space_op('include!')
^  Redo: (223) [user] eval_20(=, _52366, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
^  Unify: (223) [user] eval_20(=, _52366, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
   Call: (224) [system] is_list('&corelib')
^  Redo: (223) [user] eval_20(=, _52366, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
^  Unify: (223) [user] eval_20(=, _52366, 499, '&self', ['include!', '&corelib', stdlib_minimal], _108854)
   Call: (224) [user] into_space(499, '&self', '&corelib', _238460)
   Unify: (224) [user] into_space(499, '&self', '&corelib', '&self')
   Call: (225) [system] '&corelib'=='&self'
   Redo: (224) [user] into_space(499, '&self', '&corelib', _238460)
   Unify: (224) [user] into_space(499, '&self', '&corelib', '&self')
   Call: (225) [system] '&corelib'=='None'
   Redo: (224) [user] into_space(499, '&self', '&corelib', _238460)
   Unify: (224) [user] into_space(499, '&self', '&corelib', _238460)
   Call: (225) [user] eval_H(499, '&self', '&corelib', _238460)
   Unify: (225) [user] eval_H(499, '&self', '&corelib', _238460)
^  Call: (226) [user] catch_metta_return(eval_args(=, _247714, 499, '&self', '&corelib', _238460), _238460)
^  Unify: (226) [user] catch_metta_return(eval_args(=, _247714, 499, '&self', '&corelib', _238460), _238460)
^  Call: (228) [user] eval_args(=, _247714, 499, '&self', '&corelib', _238460)
^  Unify: (228) [user] eval_args(=, _247714, 499, '&self', '&corelib', _238460)
   Call: (229) [system] var('&corelib')
^  Redo: (228) [user] eval_args(=, _247714, 499, '&self', '&corelib', _238460)
^  Unify: (228) [user] eval_args(=, _247714, 499, '&self', '&corelib', _238460)
^  Call: (230) [system] setup_call_cleanup('$notrace'(_254320, _254322), once(user:self_eval('&corelib')), '$restore_trace'(_254320, _254322))
^  Unify: (230) [system] setup_call_cleanup(system:'$notrace'(_254320, _254322), system:once(user:self_eval('&corelib')), system:'$restore_trace'(_254320, _254322))
^  Call: (231) [system] sig_atomic(system:'$notrace'(_254320, _254322))
^  Exit: (230) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:self_eval('&corelib')), system:'$restore_trace'(3, -1))
   Call: (229) [system] _238460='&corelib'
   Exit: (229) [system] '&corelib'='&corelib'
^  Exit: (228) [user] eval_args(=, _247714, 499, '&self', '&corelib', '&corelib')
^  Exit: (226) [user] catch_metta_return(eval_args(=, _247714, 499, '&self', '&corelib', '&corelib'), '&corelib')
   Exit: (225) [user] eval_H(499, '&self', '&corelib', '&corelib')
   Exit: (224) [user] into_space(499, '&self', '&corelib', '&corelib')
^  Call: (224) [user] include_metta('&corelib', stdlib_minimal)
^  Unify: (224) [user] include_metta('&corelib', stdlib_minimal)
^  Call: (225) [user] without_circular_error(include_metta1('&corelib', stdlib_minimal), missing_exception(include_metta('&corelib', stdlib_minimal)))
^  Unify: (225) [user] without_circular_error(include_metta1('&corelib', stdlib_minimal), missing_exception(include_metta('&corelib', stdlib_minimal)))
^  Call: (226) [user] when_circular('$circular_goals', include_metta1('&corelib', stdlib_minimal), include_metta1('&corelib', stdlib_minimal), throw(error(missing_exception(include_metta('&corelib', stdlib_minimal)), _267452)))
^  Unify: (226) [user] when_circular('$circular_goals', include_metta1('&corelib', stdlib_minimal), include_metta1('&corelib', stdlib_minimal), throw(error(missing_exception(include_metta('&corelib', stdlib_minimal)), _267452)))
   Call: (227) [system] nb_current('$circular_goals', _269326)
   Exit: (227) [system] nb_current('$circular_goals', [include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')])
   Call: (227) [lists] lists:member(include_metta1('&corelib', stdlib_minimal), [include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')])
   Unify: (227) [lists] lists:member(include_metta1('&corelib', stdlib_minimal), [include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')])
   Call: (228) [lists] lists:member_([load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')], include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
   Unify: (228) [lists] lists:member_([load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')], include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
   Call: (229) [lists] lists:member_([], include_metta1('&corelib', stdlib_minimal), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Redo: (226) [user] when_circular('$circular_goals', include_metta1('&corelib', stdlib_minimal), include_metta1('&corelib', stdlib_minimal), throw(error(missing_exception(include_metta('&corelib', stdlib_minimal)), _267452)))
^  Call: (227) [user] setup_call_cleanup(nb_setval('$circular_goals', [include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')]), call(include_metta1('&corelib', stdlib_minimal)), (nb_current('$circular_goals', _276798), select(include_metta1('&corelib', stdlib_minimal), _276798, _276812), nb_setval('$circular_goals', _276812)))
^  Unify: (227) [system] setup_call_cleanup(user:nb_setval('$circular_goals', [include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')]), user:call(include_metta1('&corelib', stdlib_minimal)), user:(nb_current('$circular_goals', _276798), select(include_metta1('&corelib', stdlib_minimal), _276798, _276812), nb_setval('$circular_goals', _276812)))
^  Call: (228) [system] sig_atomic(user:nb_setval('$circular_goals', [include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')]))
   Call: (230) [$syspreds] nb_setval('$circular_goals', [include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')])
   Unify: (230) [$syspreds] nb_setval('$circular_goals', [include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')])
   Call: (231) [system] duplicate_term([include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')], _281500)
   Exit: (231) [system] duplicate_term([include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')], [include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')])
   Call: (231) [system] nb_linkval('$circular_goals', [include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')])
   Exit: (231) [system] nb_linkval('$circular_goals', [include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')])
   Exit: (230) [$syspreds] nb_setval('$circular_goals', [include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')])
^  Exit: (228) [system] sig_atomic(user:nb_setval('$circular_goals', [include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')]))
^  Call: (228) [user] call(include_metta1('&corelib', stdlib_minimal))
^  Unify: (228) [system] call(user:include_metta1('&corelib', stdlib_minimal))
^  Call: (229) [user] include_metta1('&corelib', stdlib_minimal)
^  Unify: (229) [user] include_metta1('&corelib', stdlib_minimal)
^  Call: (230) [user] symbol(stdlib_minimal)
^  Unify: (230) [user] symbol(stdlib_minimal)
   Call: (231) [system] atom(stdlib_minimal)
   Exit: (231) [system] atom(stdlib_minimal)
^  Exit: (230) [user] symbol(stdlib_minimal)
   Call: (230) [system] exists_file(stdlib_minimal)
^  Redo: (229) [user] include_metta1('&corelib', stdlib_minimal)
^  Call: (230) [user] must_det_ll(with_wild_path(include_metta('&corelib'), stdlib_minimal))
^  Unify: (230) [user] must_det_ll(user:with_wild_path(include_metta('&corelib'), stdlib_minimal))
^  Call: (231) [user] once(user:with_wild_path(include_metta('&corelib'), stdlib_minimal))
^  Unify: (231) [system] once(user:with_wild_path(include_metta('&corelib'), stdlib_minimal))
^  Call: (232) [user] with_wild_path(include_metta('&corelib'), stdlib_minimal)
^  Unify: (232) [user] with_wild_path(include_metta('&corelib'), stdlib_minimal)
   Call: (233) [$syspreds] working_directory(_302884, _302884)
   Unify: (233) [$syspreds] working_directory(_302884, _302884)
   Call: (234) [system] '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/'=='/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/'
   Exit: (234) [system] '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/'=='/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/'
   Exit: (233) [$syspreds] working_directory('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/')
^  Call: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
^  Unify: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
   Call: (234) [user] extreme_debug(fbug(wwp(include_metta('&corelib'), stdlib_minimal)))
   Unify: (234) [user] extreme_debug(fbug(wwp(include_metta('&corelib'), stdlib_minimal)))
   Exit: (234) [user] extreme_debug(fbug(wwp(include_metta('&corelib'), stdlib_minimal)))
   Call: (234) [system] fail
^  Redo: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
^  Unify: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
^  Call: (234) [user] exists_virtually(stdlib_minimal)
^  Redo: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
^  Unify: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
   Call: (234) [system] var(stdlib_minimal)
^  Redo: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
^  Unify: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
^  Call: (234) [user] is_scryer
^  Unify: (234) [user] is_scryer
   Call: (235) [system] current_prolog_flag(libswipl, _322368)
   Exit: (235) [system] current_prolog_flag(libswipl, P;HTML|'/usr/lib/swi-prolog/lib/x86_64-linux/libswipl.so.9')
^  Fail: (234) [user] is_scryer
^  Redo: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
^  Unify: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
   Call: (234) [system] is_list(stdlib_minimal)
^  Redo: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
^  Unify: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
   Call: (234) [system] is_list(stdlib_minimal)
^  Redo: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
^  Unify: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
   Call: (234) [system] compound(stdlib_minimal)
^  Redo: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
^  Unify: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
^  Call: (234) [user] is_scryer
^  Unify: (234) [user] is_scryer
   Call: (235) [system] current_prolog_flag(libswipl, _341042)
   Exit: (235) [system] current_prolog_flag(libswipl, P;HTML|'/usr/lib/swi-prolog/lib/x86_64-linux/libswipl.so.9')
^  Fail: (234) [user] is_scryer
^  Redo: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
^  Call: (234) [user] symbol(stdlib_minimal)
^  Unify: (234) [user] symbol(stdlib_minimal)
   Call: (235) [system] atom(stdlib_minimal)
   Exit: (235) [system] atom(stdlib_minimal)
^  Exit: (234) [user] symbol(stdlib_minimal)
^  Unify: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
   Call: (234) [system] exists_file(stdlib_minimal)
^  Redo: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
^  Unify: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
   Call: (234) [system] fail
^  Redo: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
^  Unify: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
^  Call: (234) [user] symbolic(stdlib_minimal)
^  Unify: (234) [user] symbolic(stdlib_minimal)
   Call: (235) [system] atomic(stdlib_minimal)
   Exit: (235) [system] atomic(stdlib_minimal)
^  Exit: (234) [user] symbolic(stdlib_minimal)
^  Call: (234) [user] symbol_contains(stdlib_minimal, :)
^  Unify: (234) [user] symbol_contains(stdlib_minimal, :)
^  Call: (235) [user] atom_contains(stdlib_minimal, :)
^  Unify: (235) [user] atom_contains(stdlib_minimal, :)
   Call: (236) [system] sub_atom(stdlib_minimal, _368048, _368050, _368052, :)
   Fail: (236) [system] sub_atom(stdlib_minimal, _368988, _368990, _368992, :)
^  Fail: (235) [user] atom_contains(stdlib_minimal, :)
^  Fail: (234) [user] symbol_contains(stdlib_minimal, :)
^  Redo: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
^  Unify: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
^  Call: (234) [user] symbol_contains(stdlib_minimal, *)
^  Unify: (234) [user] symbol_contains(stdlib_minimal, *)
^  Call: (235) [user] atom_contains(stdlib_minimal, *)
^  Unify: (235) [user] atom_contains(stdlib_minimal, *)
   Call: (236) [system] sub_atom(stdlib_minimal, _377352, _377354, _377356, *)
   Fail: (236) [system] sub_atom(stdlib_minimal, _378292, _378294, _378296, *)
^  Fail: (235) [user] atom_contains(stdlib_minimal, *)
^  Fail: (234) [user] symbol_contains(stdlib_minimal, *)
^  Redo: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
^  Unify: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
   Call: (234) [system] exists_directory(stdlib_minimal)
^  Redo: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
^  Unify: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
   Call: (234) [system] exists_directory(stdlib_minimal)
^  Redo: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
   Call: (234) [system] exists_file(stdlib_minimal)
^  Redo: (233) [user] wwp(include_metta('&corelib'), stdlib_minimal)
^  Call: (234) [user] extension_search_order(_389352)
^  Unify: (234) [user] extension_search_order(['.metta'])
^  Exit: (234) [user] extension_search_order(['.metta'])
^  Call: (234) [user] symbolic_list_concat([stdlib_minimal, '.metta'], _392138)
^  Unify: (234) [user] symbolic_list_concat([stdlib_minimal, '.metta'], _392138)
   Call: (235) [system] atomic_list_concat([stdlib_minimal, '.metta'], _392138)
   Exit: (235) [system] atomic_list_concat([stdlib_minimal, '.metta'], P;HTML|'stdlib_minimal.metta')
^  Exit: (234) [user] symbolic_list_concat([stdlib_minimal, '.metta'], P;HTML|'stdlib_minimal.metta')
   Call: (234) [system] exists_file(P;HTML|'stdlib_minimal.metta')
   Exit: (234) [system] exists_file(P;HTML|'stdlib_minimal.metta')
^  Call: (234) [user] include_metta('&corelib', P;HTML|'stdlib_minimal.metta')
^  Unify: (234) [user] include_metta('&corelib', P;HTML|'stdlib_minimal.metta')
^  Call: (235) [user] without_circular_error(include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), missing_exception(include_metta('&corelib', P;HTML|'stdlib_minimal.metta')))
^  Unify: (235) [user] without_circular_error(include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), missing_exception(include_metta('&corelib', P;HTML|'stdlib_minimal.metta')))
^  Call: (236) [user] when_circular('$circular_goals', include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), throw(error(missing_exception(include_metta('&corelib', P;HTML|'stdlib_minimal.metta')), _440944)))
^  Unify: (236) [user] when_circular('$circular_goals', include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), throw(error(missing_exception(include_metta('&corelib', P;HTML|'stdlib_minimal.metta')), _440944)))
   Call: (237) [system] nb_current('$circular_goals', _465966)
   Exit: (237) [system] nb_current('$circular_goals', [include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')])
   Call: (237) [lists] lists:member(include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), [include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')])
   Unify: (237) [lists] lists:member(include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), [include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')])
   Call: (238) [lists] lists:member_([include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')], include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), include_metta1('&corelib', stdlib_minimal))
   Unify: (238) [lists] lists:member_([include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')], include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), include_metta1('&corelib', stdlib_minimal))
   Call: (239) [lists] lists:member_([load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')], include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
   Unify: (239) [lists] lists:member_([load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')], include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
   Call: (240) [lists] lists:member_([], include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Redo: (236) [user] when_circular('$circular_goals', include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), throw(error(missing_exception(include_metta('&corelib', P;HTML|'stdlib_minimal.metta')), _440944)))
^  Call: (237) [user] setup_call_cleanup(nb_setval('$circular_goals', [include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')]), call(include_metta1('&corelib', P;HTML|'stdlib_minimal.metta')), (nb_current('$circular_goals', _513882), select(include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), _5570, _5584), nb_setval('$circular_goals', _5584)))
^  Unify: (237) [system] setup_call_cleanup(user:nb_setval('$circular_goals', [include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')]), user:call(include_metta1('&corelib', P;HTML|'stdlib_minimal.metta')), user:(nb_current('$circular_goals', _5570), select(include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), _5570, _5584), nb_setval('$circular_goals', _5584)))
^  Call: (238) [system] sig_atomic(user:nb_setval('$circular_goals', [include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')]))
   Call: (240) [$syspreds] nb_setval('$circular_goals', [include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')])
   Unify: (240) [$syspreds] nb_setval('$circular_goals', [include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')])
   Call: (241) [system] duplicate_term([include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')], _35540)
   Exit: (241) [system] duplicate_term([include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')], [include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')])
   Call: (241) [system] nb_linkval('$circular_goals', [include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')])
   Exit: (241) [system] nb_linkval('$circular_goals', [include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')])
   Exit: (240) [$syspreds] nb_setval('$circular_goals', [include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')])
^  Exit: (238) [system] sig_atomic(user:nb_setval('$circular_goals', [include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'), include_metta1('&corelib', stdlib_minimal), include_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'), load_metta1('&self', 'tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')]))
^  Call: (238) [user] call(include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'))
^  Unify: (238) [system] call(user:include_metta1('&corelib', P;HTML|'stdlib_minimal.metta'))
^  Call: (239) [user] include_metta1('&corelib', P;HTML|'stdlib_minimal.metta')
^  Unify: (239) [user] include_metta1('&corelib', P;HTML|'stdlib_minimal.metta')
^  Call: (240) [user] symbol(P;HTML|'stdlib_minimal.metta')
^  Unify: (240) [user] symbol(P;HTML|'stdlib_minimal.metta')
   Call: (241) [system] atom(P;HTML|'stdlib_minimal.metta')
   Exit: (241) [system] atom(P;HTML|'stdlib_minimal.metta')
^  Exit: (240) [user] symbol(P;HTML|'stdlib_minimal.metta')
   Call: (240) [system] exists_file(P;HTML|'stdlib_minimal.metta')
   Exit: (240) [system] exists_file(P;HTML|'stdlib_minimal.metta')
^  Unify: (239) [user] include_metta1('&corelib', P;HTML|'stdlib_minimal.metta')
^  Call: (240) [user] must_det_ll(symbol(P;HTML|'stdlib_minimal.metta'))
^  Unify: (240) [user] must_det_ll(user:symbol(P;HTML|'stdlib_minimal.metta'))
^  Call: (241) [user] once(user:symbol(P;HTML|'stdlib_minimal.metta'))
^  Unify: (241) [system] once(user:symbol(P;HTML|'stdlib_minimal.metta'))
^  Call: (242) [user] symbol(P;HTML|'stdlib_minimal.metta')
^  Unify: (242) [user] symbol(P;HTML|'stdlib_minimal.metta')
   Call: (243) [system] atom(P;HTML|'stdlib_minimal.metta')
   Exit: (243) [system] atom(P;HTML|'stdlib_minimal.metta')
^  Exit: (242) [user] symbol(P;HTML|'stdlib_minimal.metta')
^  Exit: (241) [system] once(user:symbol(P;HTML|'stdlib_minimal.metta'))
^  Exit: (240) [user] must_det_ll(user:symbol(P;HTML|'stdlib_minimal.metta'))
^  Call: (240) [user] must_det_ll(exists_file(P;HTML|'stdlib_minimal.metta'))
^  Unify: (240) [user] must_det_ll(user:exists_file(P;HTML|'stdlib_minimal.metta'))
^  Call: (241) [user] once(user:exists_file(P;HTML|'stdlib_minimal.metta'))
^  Unify: (241) [system] once(user:exists_file(P;HTML|'stdlib_minimal.metta'))
   Call: (242) [system] exists_file(P;HTML|'stdlib_minimal.metta')
   Exit: (242) [system] exists_file(P;HTML|'stdlib_minimal.metta')
^  Exit: (241) [system] once(user:exists_file(P;HTML|'stdlib_minimal.metta'))
^  Exit: (240) [user] must_det_ll(user:exists_file(P;HTML|'stdlib_minimal.metta'))
^  Call: (240) [user] must_det_ll(afn_from(P;HTML|'stdlib_minimal.metta', _216500))
^  Unify: (240) [user] must_det_ll(user:afn_from(P;HTML|'stdlib_minimal.metta', _216500))
^  Call: (241) [user] once(user:afn_from(P;HTML|'stdlib_minimal.metta', _216500))
^  Unify: (241) [system] once(user:afn_from(P;HTML|'stdlib_minimal.metta', _216500))
^  Call: (242) [user] afn_from(P;HTML|'stdlib_minimal.metta', _216500)
^  Unify: (242) [user] afn_from(P;HTML|'stdlib_minimal.metta', _216500)
^  Call: (243) [user] afn_from(P;HTML|'stdlib_minimal.metta', _216500, [])
^  Unify: (243) [user] afn_from(P;HTML|'stdlib_minimal.metta', _216500, [])
   Call: (244) [lists] lists:select(relative_to(_254802), [], _254804)
^  Redo: (243) [user] afn_from(P;HTML|'stdlib_minimal.metta', _216500, [])
^  Unify: (243) [user] afn_from(P;HTML|'stdlib_minimal.metta', _216500, [])
^  Call: (244) [user] is_metta_module_path(_265318)
^  Unify: (244) [user] is_metta_module_path('.')
^  Exit: (244) [user] is_metta_module_path('.')
^  Call: (245) [rtrace] rtrace:quietly3(user:afn(P;HTML|'stdlib_minimal.metta', _216500, [relative_to('.')]))
^  Unify: (245) [rtrace] rtrace:quietly3(user:afn(P;HTML|'stdlib_minimal.metta', _216500, [relative_to('.')]))
^  Exit: (245) [rtrace] rtrace:quietly3(user:afn(P;HTML|'stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', [relative_to('.')]))
^  Exit: (243) [user] afn_from(P;HTML|'stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', [])
^  Exit: (242) [user] afn_from(P;HTML|'stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Exit: (241) [system] once(user:afn_from(P;HTML|'stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Exit: (240) [user] must_det_ll(user:afn_from(P;HTML|'stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (240) [user] must_det_ll(gen_tmp_file(false, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (240) [user] must_det_ll(user:gen_tmp_file(false, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (241) [user] once(user:gen_tmp_file(false, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (241) [system] once(user:gen_tmp_file(false, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (242) [user] gen_tmp_file(false, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Unify: (242) [user] gen_tmp_file(false, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (243) [system] file_name_extension(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 'buffer~', _350486)
   Exit: (243) [system] file_name_extension(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 'buffer~', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.buffer~')
^  Call: (243) [user] check_input_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Unify: (243) [user] check_input_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (244) [system] exists_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (244) [system] exists_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (244) [system] access_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', read)
   Exit: (244) [system] access_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', read)
^  Exit: (243) [user] check_input_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (243) [system] false
   Unify: (243) [system] false
   Call: (244) [system] fail
^  Redo: (242) [user] gen_tmp_file(false, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (243) [user] needs_regeneration(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.buffer~')
^  Unify: (243) [user] needs_regeneration(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.buffer~')
   Call: (244) [system] exists_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.buffer~')
^  Redo: (243) [user] needs_regeneration(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.buffer~')
^  Unify: (243) [user] needs_regeneration(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.buffer~')
   Call: (244) [system] exists_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (244) [system] exists_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Redo: (242) [user] gen_tmp_file(false, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (243) [user] hide_op(log_progress('Info: No need to regenerate: ~w~n', ['/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.buffer~']))
^  Unify: (243) [user] hide_op(log_progress('Info: No need to regenerate: ~w~n', ['/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.buffer~']))
^  Exit: (243) [user] hide_op(log_progress('Info: No need to regenerate: ~w~n', ['/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.buffer~']))
^  Exit: (242) [user] gen_tmp_file(false, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Exit: (241) [system] once(user:gen_tmp_file(false, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Exit: (240) [user] must_det_ll(user:gen_tmp_file(false, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (240) [user] must_det_ll(directory_file_path(_453444, _453446, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (240) [user] must_det_ll(user:directory_file_path(_453444, _453446, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (241) [user] once(user:directory_file_path(_453444, _453446, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (241) [system] once(user:directory_file_path(_453444, _453446, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Call: (242) [files_ex] files_ex:directory_file_path(_453444, _453446, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Unify: (242) [files_ex] files_ex:directory_file_path(_453444, _453446, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (243) [system] nonvar(_453444)
   Fail: (243) [system] nonvar(_453444)
   Redo: (242) [files_ex] files_ex:directory_file_path(_453444, _453446, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Unify: (242) [files_ex] files_ex:directory_file_path(_453444, _453446, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (243) [system] nonvar(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (243) [system] nonvar(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (243) [system] nonvar(_453444)
   Fail: (243) [system] nonvar(_453444)
   Redo: (242) [files_ex] files_ex:directory_file_path(_453444, _453446, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (243) [system] nonvar(_453446)
   Fail: (243) [system] nonvar(_453446)
   Redo: (242) [files_ex] files_ex:directory_file_path(_453444, _453446, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (243) [system] file_directory_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _453444)
   Exit: (243) [system] file_directory_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
   Call: (243) [system] file_base_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _5668)
   Exit: (243) [system] file_base_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', P;HTML|'stdlib_minimal.metta')
   Exit: (242) [files_ex] files_ex:directory_file_path('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', P;HTML|'stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Exit: (241) [system] once(user:directory_file_path('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', P;HTML|'stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Exit: (240) [user] must_det_ll(user:directory_file_path('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', P;HTML|'stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (240) [user] must_det_ll(pfcAdd_Now(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')))
^  Unify: (240) [user] must_det_ll(user:pfcAdd_Now(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')))
^  Call: (241) [user] once(user:pfcAdd_Now(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')))
^  Unify: (241) [system] once(user:pfcAdd_Now(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')))
^  Call: (242) [user] pfcAdd_Now(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Unify: (242) [user] pfcAdd_Now(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Call: (243) [user] current_predicate(pfcAdd/1)
^  Exit: (243) [user] current_predicate(pfcAdd/1)
^  Call: (243) [user] once_writeq_nl(pfcAdd(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')))
^  Unify: (243) [user] once_writeq_nl(pfcAdd(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')))
^  Call: (244) [user] clause(pfcTraceExecution, true)
^  Fail: (244) [user] clause(pfcTraceExecution, true)
^  Redo: (243) [user] once_writeq_nl(pfcAdd(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')))
^  Exit: (243) [user] once_writeq_nl(pfcAdd(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')))
^  Call: (243) [user] pfcAdd(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Unify: (243) [user] pfcAdd(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Call: (244) [user] must_ex(current_why_UU(_110018))
^  Unify: (244) [user] must_ex(current_why_UU(_110018))
   Call: (246) [user] current_why_UU(_110018)
   Unify: (246) [user] current_why_UU(_110018)
^  Call: (247) [user] get_why_uu(_110018)
^  Unify: (247) [user] get_why_uu(_110018)
^  Call: (248) [user] findall(_115558, current_why(_115558), _115564)
^  Unify: (248) [$bags] findall(_115558, user:current_why(_115558), _115564)
^  Call: (249) [$bags] findall(_115558, user:current_why(_115558), _115564, [])
^  Unify: (249) [$bags] findall(_115558, user:current_why(_115558), _115564, [])
^  Call: (250) [$bags] cleanup_bag(findall_loop(_115558, user:current_why(_115558), _115564, []), '$destroy_findall_bag')
^  Unify: (250) [$bags] cleanup_bag('$bags':findall_loop(_115558, user:current_why(_115558), _115564, []), '$bags':'$destroy_findall_bag')
   Call: (251) [$bags] findall_loop(_115558, user:current_why(_115558), _115564, [])
   Unify: (251) [$bags] findall_loop(_115558, user:current_why(_115558), _115564, [])
^  Call: (252) [user] bugger:current_why(_115558)
^  Unify: (252) [user] bugger:current_why(_115558)
^  Call: (253) [user] bugger:current_why_data(_115558)
^  Unify: (253) [user] bugger:current_why_data(_115558)
   Call: (254) [system] nb_current('$current_why', wp(_115558, _126818))
   Fail: (254) [system] nb_current('$current_why', wp(_115558, _126818))
^  Redo: (253) [user] bugger:current_why_data(_115558)
^  Unify: (253) [user] bugger:current_why_data(_115558)
   Call: (254) [t_l] t_l:current_why_source(_115558)
   Fail: (254) [t_l] t_l:current_why_source(_115558)
^  Fail: (253) [user] bugger:current_why_data(_115558)
^  Redo: (252) [user] bugger:current_why(_115558)
^  Unify: (252) [user] bugger:current_why(mfl4(_134246, _134248, _134250, _134252))
^  Call: (254) [system] setup_call_cleanup('$notrace'(_135202, _135204), once(user:current_mfl4(_134246, _134248, _134250, _134252)), '$restore_trace'(_135202, _135204))
^  Unify: (254) [system] setup_call_cleanup(system:'$notrace'(_135202, _135204), system:once(user:current_mfl4(_134246, _134248, _134250, _134252)), system:'$restore_trace'(_135202, _135204))
^  Call: (255) [system] sig_atomic(system:'$notrace'(_135202, _135204))
^  Exit: (254) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:current_mfl4(_134246, user, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1805)), system:'$restore_trace'(3, -1))
^  Exit: (252) [user] bugger:current_why(P;HTML|mfl4(_134246, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Redo: (251) [$bags] findall_loop(_115558, user:current_why(_115558), _115564, [])
   Exit: (251) [$bags] findall_loop(_115558, user:current_why(_115558), [P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], [])
^  Exit: (250) [$bags] cleanup_bag('$bags':findall_loop(_115558, user:current_why(_115558), [P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], []), '$bags':'$destroy_findall_bag')
^  Exit: (249) [$bags] findall(_115558, user:current_why(_115558), [P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], [])
^  Exit: (248) [$bags] findall(_115558, user:current_why(_115558), [P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Call: (248) [system] [P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]\==[]
   Exit: (248) [system] [P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]\==[]
^  Call: (248) [user] u_to_uu([P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _110018)
^  Unify: (248) [user] u_to_uu([P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], ([P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], ax))
   Call: (249) [system] var([P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Fail: (249) [system] var([P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
^  Redo: (248) [user] u_to_uu([P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _110018)
^  Unify: (248) [user] u_to_uu([P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], [P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Call: (249) [system] nonvar([P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Exit: (249) [system] nonvar([P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Call: (249) [system] [P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]=(_271970, _271972)
   Fail: (249) [system] [P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]=(_271970, _271972)
^  Redo: (248) [user] u_to_uu([P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _110018)
^  Unify: (248) [user] u_to_uu([P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _110018)
^  Call: (249) [user] logicmoo_util_terms:list_to_conjuncts([P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _302404)
^  Unify: (249) [user] logicmoo_util_terms:list_to_conjuncts([P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _302404)
^  Call: (250) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _302404)
^  Unify: (250) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], [P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Call: (251) [system] var([P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Fail: (251) [system] var([P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
^  Redo: (250) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _302404)
^  Unify: (250) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], [P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
^  Call: (251) [user] not(compound([P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]))
^  Unify: (251) [system] not(user:compound([P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]))
   Call: (252) [system] compound([P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Exit: (252) [system] compound([P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
^  Fail: (251) [system] not(user:compound([P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]))
^  Redo: (250) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _302404)
^  Unify: (250) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _302404)
^  Call: (251) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _302404)
^  Unify: (251) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Call: (252) [system] var(P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Fail: (252) [system] var(P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Redo: (251) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _302404)
^  Unify: (251) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Call: (252) [user] not(compound(P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)))
^  Unify: (252) [system] not(user:compound(P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)))
   Call: (253) [system] compound(P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Exit: (253) [system] compound(P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Fail: (252) [system] not(user:compound(P;HTML|mfl4(_152086, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)))
^  Redo: (251) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _5732)
^  Unify: (251) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Exit: (251) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Exit: (250) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Exit: (249) [user] logicmoo_util_terms:list_to_conjuncts([P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Call: (249) [user] u_to_uu(P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _5686)
^  Unify: (249) [user] u_to_uu(P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), (P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
   Call: (250) [system] var(P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Fail: (250) [system] var(P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Redo: (249) [user] u_to_uu(P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _5686)
^  Unify: (249) [user] u_to_uu(P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Call: (250) [system] nonvar(P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Exit: (250) [system] nonvar(P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Call: (250) [system] P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)=(_148966, _148968)
   Fail: (250) [system] P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)=(_148966, _148968)
^  Redo: (249) [user] u_to_uu(P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _5686)
^  Unify: (249) [user] u_to_uu(P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), (P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (249) [user] u_to_uu(P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), (P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (248) [user] u_to_uu([P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], (P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (247) [user] get_why_uu((P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
   Exit: (246) [user] current_why_UU((P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (244) [user] must_ex(current_why_UU((P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Call: (244) [user] pfcAdd(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (244) [user] pfcAdd(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (245) [user] pfcPost(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (245) [user] pfcPost(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (246) [user] pfcPost_rev((P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Unify: (246) [user] pfcPost_rev((P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
   Call: (247) [system] is_list(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
   Fail: (247) [system] is_list(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Redo: (246) [user] pfcPost_rev((P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Call: (247) [user] pfcPost1(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (247) [user] pfcPost1(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (248) [user] control_arg_types(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _350578)
^  Unify: (248) [user] control_arg_types(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _350578)
   Call: (249) [system] fail
   Fail: (249) [system] fail
^  Fail: (248) [user] control_arg_types(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _350578)
^  Redo: (247) [user] pfcPost1(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (247) [user] pfcPost1(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (248) [user] locally_each:locally(set_prolog_flag(occurs_check, true), catch(pfcPost11(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _389904, (notrace, wdmsg((metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')=>_389904)), trace)))
^  Unify: (248) [locally_each] locally_each:locally(user:set_prolog_flag(occurs_check, true), user:catch(pfcPost11(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _389904, (notrace, wdmsg((metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')=>_389904)), trace)))
^  Call: (249) [locally_each] locally_each:wtl(user, set_prolog_flag(occurs_check, true), user:catch(pfcPost11(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _389904, (notrace, wdmsg((metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')=>_389904)), trace)), user:each_call_cleanup)
^  Unify: (249) [locally_each] locally_each:wtl(user, set_prolog_flag(occurs_check, true), user:catch(pfcPost11(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _389904, (notrace, wdmsg((metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')=>_389904)), trace)), user:each_call_cleanup)
   Call: (250) [system] current_prolog_flag(occurs_check, _451610)
   Exit: (250) [system] current_prolog_flag(occurs_check, true)
^  Call: (250) [locally_each] locally_each:wtl_how(trusted_redo_call_cleanup, true==true, user:set_prolog_flag(occurs_check, true), user:catch(pfcPost11(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _389904, (notrace, wdmsg((metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')=>_389904)), trace)), user:set_prolog_flag(occurs_check, true))
^  Unify: (250) [locally_each] locally_each:wtl_how(locally_each:trusted_redo_call_cleanup, locally_each:(true==true), user:set_prolog_flag(occurs_check, true), user:catch(pfcPost11(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _389904, (notrace, wdmsg((metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')=>_389904)), trace)), user:set_prolog_flag(occurs_check, true))
   Call: (251) [system] true==true
   Exit: (251) [system] true==true
^  Call: (252) [user] pfcPost11(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (252) [user] pfcPost11(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (253) [user] must_ex(pfcAddSupport(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5712, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Unify: (253) [user] must_ex(pfcAddSupport(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Call: (255) [user] pfcAddSupport(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (255) [user] pfcAddSupport(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (256) [user] assert('$spft$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (256) [user] assert('$spft$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (255) [user] pfcAddSupport(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (253) [user] must_ex(pfcAddSupport(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Call: (253) [user] pfcUnique(post, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Unify: (253) [user] pfcUnique(post, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Call: (254) [user] pfcUnique(post, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true)
^  Unify: (254) [user] pfcUnique(post, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true)
^  Call: (255) [user] is_asserted_exact(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true)
^  Unify: (255) [user] is_asserted_exact(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true)
^  Call: (256) [user] strip_module(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _113118, _113120)
^  Exit: (256) [user] strip_module(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), user, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Call: (256) [user] is_asserted_exact(user, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true)
^  Unify: (256) [user] is_asserted_exact(user, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true)
   Call: (257) [system] _136352=user
   Exit: (257) [system] user=user
^  Call: (257) [user] clause(user:metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true, _138222)
^  Fail: (257) [user] clause(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true, _138222)
^  Redo: (256) [user] is_asserted_exact(user, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true)
^  Call: (257) [user] clause(user:metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true, _152744)
^  Fail: (257) [user] clause(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true, _152744)
^  Fail: (256) [user] is_asserted_exact(user, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true)
^  Fail: (255) [user] is_asserted_exact(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true)
^  Redo: (254) [user] pfcUnique(post, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true)
^  Exit: (254) [user] pfcUnique(post, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true)
^  Exit: (253) [user] pfcUnique(post, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Call: (253) [user] pfcPost2(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (253) [user] pfcPost2(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (254) [user] must_ex(once((\+ \+is_asserted_exact(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'));assert(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')))))
^  Unify: (254) [user] must_ex(once((\+ \+is_asserted_exact(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'));assert(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')))))
^  Call: (256) [user] once((\+ \+is_asserted_exact(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'));assert(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))))
^  Unify: (256) [system] once(user:(\+ \+is_asserted_exact(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'));assert(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))))
^  Call: (258) [user] is_asserted_exact(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Unify: (258) [user] is_asserted_exact(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Call: (259) [user] strip_module(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _254156, _254158)
^  Exit: (259) [user] strip_module(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), user, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Call: (259) [user] hook_database:expand_to_hb(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _267730, _267732)
^  Unify: (259) [user] hook_database:expand_to_hb(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true)
   Call: (260) [system] var(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
   Fail: (260) [system] var(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Redo: (259) [user] hook_database:expand_to_hb(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _267730, _267732)
^  Unify: (259) [user] hook_database:expand_to_hb(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true)
^  Exit: (259) [user] hook_database:expand_to_hb(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true)
^  Call: (259) [user] is_asserted_exact(user, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true)
^  Unify: (259) [user] is_asserted_exact(user, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true)
   Call: (260) [system] _322912=user
   Exit: (260) [system] user=user
^  Call: (260) [user] clause(user:metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true, _324782)
^  Fail: (260) [user] clause(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true, _324782)
^  Redo: (259) [user] is_asserted_exact(user, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true)
^  Call: (260) [user] clause(user:metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true, _339304)
^  Fail: (260) [user] clause(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true, _339304)
^  Fail: (259) [user] is_asserted_exact(user, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), true)
^  Fail: (258) [user] is_asserted_exact(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Call: (258) [user] assert(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Exit: (258) [user] assert(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Exit: (256) [system] once(user:(\+ \+is_asserted_exact(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'));assert(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))))
^  Exit: (254) [user] must_ex(once((\+ \+is_asserted_exact(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'));assert(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')))))
^  Call: (254) [user] must_ex(pfcTraceAdd(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Unify: (254) [user] must_ex(pfcTraceAdd(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Call: (256) [user] pfcTraceAdd(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (256) [user] pfcTraceAdd(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (257) [user] pfcTraceAddPrint(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (257) [user] pfcTraceAddPrint(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (258) [user] pfcIsTraced(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Unify: (258) [user] pfcIsTraced(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Call: (259) [user] pfcIsNotTraced(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Unify: (259) [user] pfcIsNotTraced(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Call: (260) [user] compound_eles(1, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _474054)
^  Unify: (260) [user] compound_eles(1, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _474054)
   Call: (261) [system] var(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
   Fail: (261) [system] var(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Redo: (260) [user] compound_eles(1, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _474054)
^  Unify: (260) [user] compound_eles(1, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _474054)
   Call: (261) [system] compound(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
   Exit: (261) [system] compound(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
   Call: (261) [system] 1<1
   Fail: (261) [system] 1<1
^  Redo: (260) [user] compound_eles(1, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _474054)
^  Unify: (260) [user] compound_eles(1, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _5848)
   Call: (261) [system] _6820 is 1+ -1
   Exit: (261) [system] 0 is 1+ -1
^  Call: (261) [user] compound_eles(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _8678)
^  Unify: (261) [user] compound_eles(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _8678)
   Call: (262) [system] is_list(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
   Fail: (262) [system] is_list(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Redo: (261) [user] compound_eles(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _8678)
^  Unify: (261) [user] compound_eles(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _8678)
   Call: (262) [system] compound(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
   Exit: (262) [system] compound(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
   Call: (262) [system] compound_name_arguments(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _47272, _47274)
   Exit: (262) [system] compound_name_arguments(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file, ['&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'])
   Call: (262) [lists] lists:member(_8678, [metta_file, '&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'])
   Unify: (262) [lists] lists:member(_8678, [metta_file, '&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'])
   Call: (263) [lists] lists:member_(['&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], _8678, metta_file)
   Unify: (263) [lists] lists:member_(['&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], metta_file, metta_file)
   Exit: (263) [lists] lists:member_(['&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], metta_file, metta_file)
   Exit: (262) [lists] lists:member(metta_file, [metta_file, '&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'])
^  Exit: (261) [user] compound_eles(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file)
^  Call: (261) [user] compound_eles(0, metta_file, _5848)
^  Unify: (261) [user] compound_eles(0, metta_file, _5848)
   Call: (262) [system] var(metta_file)
   Fail: (262) [system] var(metta_file)
^  Redo: (261) [user] compound_eles(0, metta_file, _5848)
^  Unify: (261) [user] compound_eles(0, metta_file, _5848)
   Call: (262) [system] compound(metta_file)
   Fail: (262) [system] compound(metta_file)
^  Redo: (261) [user] compound_eles(0, metta_file, _5848)
   Call: (262) [system] _5848=metta_file
   Exit: (262) [system] metta_file=metta_file
^  Exit: (261) [user] compound_eles(0, metta_file, metta_file)
^  Exit: (260) [user] compound_eles(1, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file)
^  Call: (260) [user] pfcIgnored(metta_file)
^  Fail: (260) [user] pfcIgnored(metta_file)
   Redo: (263) [lists] lists:member_(['&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], _8678, metta_file)
   Unify: (263) [lists] lists:member_(['&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], _8678, metta_file)
   Call: (264) [lists] lists:member_([P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], _8678, '&corelib')
   Unify: (264) [lists] lists:member_([P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], '&corelib', '&corelib')
   Exit: (264) [lists] lists:member_([P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], '&corelib', '&corelib')
   Exit: (263) [lists] lists:member_(['&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], '&corelib', metta_file)
   Exit: (262) [lists] lists:member('&corelib', [metta_file, '&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'])
^  Exit: (261) [user] compound_eles(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), '&corelib')
^  Call: (261) [user] compound_eles(0, '&corelib', _5848)
^  Unify: (261) [user] compound_eles(0, '&corelib', _5848)
   Call: (262) [system] var('&corelib')
   Fail: (262) [system] var('&corelib')
^  Redo: (261) [user] compound_eles(0, '&corelib', _5848)
^  Unify: (261) [user] compound_eles(0, '&corelib', _5848)
   Call: (262) [system] compound('&corelib')
   Fail: (262) [system] compound('&corelib')
^  Redo: (261) [user] compound_eles(0, '&corelib', _5848)
   Call: (262) [system] _5848='&corelib'
   Exit: (262) [system] '&corelib'='&corelib'
^  Exit: (261) [user] compound_eles(0, '&corelib', '&corelib')
^  Exit: (260) [user] compound_eles(1, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), '&corelib')
^  Call: (260) [user] pfcIgnored('&corelib')
^  Fail: (260) [user] pfcIgnored('&corelib')
   Redo: (264) [lists] lists:member_([P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], _8678, '&corelib')
   Unify: (264) [lists] lists:member_([P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], _8678, '&corelib')
   Call: (265) [lists] lists:member_(['/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], _8678, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Unify: (265) [lists] lists:member_(['/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (265) [lists] lists:member_(['/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (264) [lists] lists:member_([P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib')
   Exit: (263) [lists] lists:member_(['&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', metta_file)
   Exit: (262) [lists] lists:member(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', [metta_file, '&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'])
^  Exit: (261) [user] compound_eles(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (261) [user] compound_eles(0, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _5848)
^  Unify: (261) [user] compound_eles(0, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _5848)
   Call: (262) [system] var(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Fail: (262) [system] var(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Redo: (261) [user] compound_eles(0, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _5848)
^  Unify: (261) [user] compound_eles(0, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _5848)
   Call: (262) [system] compound(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Fail: (262) [system] compound(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Redo: (261) [user] compound_eles(0, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _5848)
   Call: (262) [system] _5848=P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'
   Exit: (262) [system] P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'=P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'
^  Exit: (261) [user] compound_eles(0, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Exit: (260) [user] compound_eles(1, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (260) [user] pfcIgnored(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Fail: (260) [user] pfcIgnored(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Redo: (265) [lists] lists:member_(['/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], _8678, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Unify: (265) [lists] lists:member_(['/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], _8678, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (266) [lists] lists:member_([], _8678, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
   Unify: (266) [lists] lists:member_([], '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
   Exit: (266) [lists] lists:member_([], '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
   Exit: (265) [lists] lists:member_(['/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (264) [lists] lists:member_([P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', '&corelib')
   Exit: (263) [lists] lists:member_(['&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', metta_file)
   Exit: (262) [lists] lists:member('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', [metta_file, '&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'])
^  Exit: (261) [user] compound_eles(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
^  Call: (261) [user] compound_eles(0, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', _5848)
^  Unify: (261) [user] compound_eles(0, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', _5848)
   Call: (262) [system] var('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
   Fail: (262) [system] var('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
^  Redo: (261) [user] compound_eles(0, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', _5848)
^  Unify: (261) [user] compound_eles(0, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', _5848)
   Call: (262) [system] compound('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
   Fail: (262) [system] compound('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
^  Redo: (261) [user] compound_eles(0, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', _5848)
   Call: (262) [system] _5848='/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'
   Exit: (262) [system] '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'='/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'
^  Exit: (261) [user] compound_eles(0, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
^  Exit: (260) [user] compound_eles(1, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
^  Call: (260) [user] pfcIgnored('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
^  Fail: (260) [user] pfcIgnored('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
^  Fail: (259) [user] pfcIsNotTraced(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Redo: (258) [user] pfcIsTraced(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Unify: (258) [user] pfcIsTraced(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Call: (259) [user] compound_eles(1, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _388752)
^  Unify: (259) [user] compound_eles(1, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _388752)
   Call: (260) [system] var(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
   Fail: (260) [system] var(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Redo: (259) [user] compound_eles(1, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _388752)
^  Unify: (259) [user] compound_eles(1, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _388752)
   Call: (260) [system] compound(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
   Exit: (260) [system] compound(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
   Call: (260) [system] 1<1
   Fail: (260) [system] 1<1
^  Redo: (259) [user] compound_eles(1, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _388752)
^  Unify: (259) [user] compound_eles(1, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _388752)
   Call: (260) [system] _438884 is 1+ -1
   Exit: (260) [system] 0 is 1+ -1
^  Call: (260) [user] compound_eles(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _440742)
^  Unify: (260) [user] compound_eles(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _440742)
   Call: (261) [system] is_list(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
   Fail: (261) [system] is_list(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Redo: (260) [user] compound_eles(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _440742)
^  Unify: (260) [user] compound_eles(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _440742)
   Call: (261) [system] compound(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
   Exit: (261) [system] compound(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
   Call: (261) [system] compound_name_arguments(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _479336, _479338)
   Exit: (261) [system] compound_name_arguments(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file, ['&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'])
   Call: (261) [lists] lists:member(_440742, [metta_file, '&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'])
   Unify: (261) [lists] lists:member(_440742, [metta_file, '&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'])
   Call: (262) [lists] lists:member_(['&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], _440742, metta_file)
   Unify: (262) [lists] lists:member_(['&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], metta_file, metta_file)
   Exit: (262) [lists] lists:member_(['&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], metta_file, metta_file)
   Exit: (261) [lists] lists:member(metta_file, [metta_file, '&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'])
^  Exit: (260) [user] compound_eles(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file)
^  Call: (260) [user] compound_eles(0, metta_file, _5848)
^  Unify: (260) [user] compound_eles(0, metta_file, _5848)
   Call: (261) [system] var(metta_file)
   Fail: (261) [system] var(metta_file)
^  Redo: (260) [user] compound_eles(0, metta_file, _5848)
^  Unify: (260) [user] compound_eles(0, metta_file, _5848)
   Call: (261) [system] compound(metta_file)
   Fail: (261) [system] compound(metta_file)
^  Redo: (260) [user] compound_eles(0, metta_file, _5848)
   Call: (261) [system] _5848=metta_file
   Exit: (261) [system] metta_file=metta_file
^  Exit: (260) [user] compound_eles(0, metta_file, metta_file)
^  Exit: (259) [user] compound_eles(1, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file)
^  Call: (259) [user] pfcTraced(metta_file)
^  Fail: (259) [user] pfcTraced(metta_file)
   Redo: (262) [lists] lists:member_(['&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], _5852, metta_file)
   Unify: (262) [lists] lists:member_(['&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], _5852, metta_file)
   Call: (263) [lists] lists:member_([P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], _5852, '&corelib')
   Unify: (263) [lists] lists:member_([P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], '&corelib', '&corelib')
   Exit: (263) [lists] lists:member_([P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], '&corelib', '&corelib')
   Exit: (262) [lists] lists:member_(['&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], '&corelib', metta_file)
   Exit: (261) [lists] lists:member('&corelib', [metta_file, '&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'])
^  Exit: (260) [user] compound_eles(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), '&corelib')
^  Call: (260) [user] compound_eles(0, '&corelib', _5848)
^  Unify: (260) [user] compound_eles(0, '&corelib', _5848)
   Call: (261) [system] var('&corelib')
   Fail: (261) [system] var('&corelib')
^  Redo: (260) [user] compound_eles(0, '&corelib', _5848)
^  Unify: (260) [user] compound_eles(0, '&corelib', _5848)
   Call: (261) [system] compound('&corelib')
   Fail: (261) [system] compound('&corelib')
^  Redo: (260) [user] compound_eles(0, '&corelib', _5848)
   Call: (261) [system] _5848='&corelib'
   Exit: (261) [system] '&corelib'='&corelib'
^  Exit: (260) [user] compound_eles(0, '&corelib', '&corelib')
^  Exit: (259) [user] compound_eles(1, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), '&corelib')
^  Call: (259) [user] pfcTraced('&corelib')
^  Fail: (259) [user] pfcTraced('&corelib')
   Redo: (263) [lists] lists:member_([P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], _5852, '&corelib')
   Unify: (263) [lists] lists:member_([P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], _5852, '&corelib')
   Call: (264) [lists] lists:member_(['/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], _5852, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Unify: (264) [lists] lists:member_(['/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (264) [lists] lists:member_(['/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (263) [lists] lists:member_([P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib')
   Exit: (262) [lists] lists:member_(['&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', metta_file)
   Exit: (261) [lists] lists:member(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', [metta_file, '&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'])
^  Exit: (260) [user] compound_eles(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (260) [user] compound_eles(0, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _5848)
^  Unify: (260) [user] compound_eles(0, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _5848)
   Call: (261) [system] var(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Fail: (261) [system] var(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Redo: (260) [user] compound_eles(0, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _5848)
^  Unify: (260) [user] compound_eles(0, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _5848)
   Call: (261) [system] compound(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Fail: (261) [system] compound(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Redo: (260) [user] compound_eles(0, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _5848)
   Call: (261) [system] _5848=P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'
   Exit: (261) [system] P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'=P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'
^  Exit: (260) [user] compound_eles(0, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Exit: (259) [user] compound_eles(1, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (259) [user] pfcTraced(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Fail: (259) [user] pfcTraced(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Redo: (264) [lists] lists:member_(['/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], _5852, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Unify: (264) [lists] lists:member_(['/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], _5852, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (265) [lists] lists:member_([], _5852, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
   Unify: (265) [lists] lists:member_([], '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
   Exit: (265) [lists] lists:member_([], '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
   Exit: (264) [lists] lists:member_(['/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (263) [lists] lists:member_([P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', '&corelib')
   Exit: (262) [lists] lists:member_(['&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'], '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', metta_file)
   Exit: (261) [lists] lists:member('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', [metta_file, '&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'])
^  Exit: (260) [user] compound_eles(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
^  Call: (260) [user] compound_eles(0, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', _5848)
^  Unify: (260) [user] compound_eles(0, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', _5848)
   Call: (261) [system] var('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
   Fail: (261) [system] var('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
^  Redo: (260) [user] compound_eles(0, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', _5848)
^  Unify: (260) [user] compound_eles(0, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', _5848)
   Call: (261) [system] compound('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
   Fail: (261) [system] compound('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
^  Redo: (260) [user] compound_eles(0, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', _5848)
   Call: (261) [system] _5848='/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'
   Exit: (261) [system] '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'='/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'
^  Exit: (260) [user] compound_eles(0, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
^  Exit: (259) [user] compound_eles(1, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
^  Call: (259) [user] pfcTraced('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
^  Fail: (259) [user] pfcTraced('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
^  Fail: (258) [user] pfcIsTraced(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Redo: (257) [user] pfcTraceAddPrint(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (257) [user] pfcTraceAddPrint(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (257) [user] pfcTraceAddPrint(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (257) [user] pfcTraceBreak(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (257) [user] pfcTraceBreak(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (258) [user] pfcSpied(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), +)
^  Fail: (258) [user] pfcSpied(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), +)
^  Redo: (257) [user] pfcTraceBreak(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (257) [user] pfcTraceBreak(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (256) [user] pfcTraceAdd(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (254) [user] must_ex(pfcTraceAdd(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Call: (254) [user] must_ex(pfcEnqueue(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Unify: (254) [user] must_ex(pfcEnqueue(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Call: (256) [user] pfcEnqueue(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (256) [user] pfcEnqueue(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (257) [user] pfcGetSearch(_452730)
^  Unify: (257) [user] pfcGetSearch(_452730)
   Call: (258) [t_l] t_l:pfcSearchTL(_454580)
   Fail: (258) [t_l] t_l:pfcSearchTL(_454580)
^  Redo: (257) [user] pfcGetSearch(_452730)
^  Call: (258) [user] pfcSearch(_457354)
^  Unify: (258) [user] pfcSearch(direct)
^  Exit: (258) [user] pfcSearch(direct)
   Call: (258) [system] _452730=direct
   Exit: (258) [system] direct=direct
^  Exit: (257) [user] pfcGetSearch(direct)
^  Call: (257) [user] pfcEnqueue(direct, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (257) [user] pfcEnqueue(direct, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
   Call: (258) [system] direct=direct
   Exit: (258) [system] direct=direct
^  Call: (258) [user] pfcFwd(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Unify: (258) [user] pfcFwd(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Call: (259) [user] control_arg_types(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _497420)
^  Unify: (259) [user] control_arg_types(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _497420)
   Call: (260) [system] fail
   Fail: (260) [system] fail
^  Fail: (259) [user] control_arg_types(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _497420)
^  Redo: (258) [user] pfcFwd(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Unify: (258) [user] pfcFwd(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Call: (259) [user] locally_each:locally(set_prolog_flag(occurs_check, true), pfcFwd0(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')))
^  Unify: (259) [locally_each] locally_each:locally(user:set_prolog_flag(occurs_check, true), user:pfcFwd0(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')))
^  Call: (260) [locally_each] locally_each:wtl(user, set_prolog_flag(occurs_check, true), user:pfcFwd0(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')), user:each_call_cleanup)
^  Unify: (260) [locally_each] locally_each:wtl(user, set_prolog_flag(occurs_check, true), user:pfcFwd0(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')), user:each_call_cleanup)
   Call: (261) [system] current_prolog_flag(occurs_check, _26198)
   Exit: (261) [system] current_prolog_flag(occurs_check, true)
^  Call: (261) [locally_each] locally_each:wtl_how(trusted_redo_call_cleanup, true==true, user:set_prolog_flag(occurs_check, true), user:pfcFwd0(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')), user:set_prolog_flag(occurs_check, true))
^  Unify: (261) [locally_each] locally_each:wtl_how(locally_each:trusted_redo_call_cleanup, locally_each:(true==true), user:set_prolog_flag(occurs_check, true), user:pfcFwd0(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')), user:set_prolog_flag(occurs_check, true))
   Call: (262) [system] true==true
   Exit: (262) [system] true==true
^  Call: (262) [user] pfcFwd0(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Unify: (262) [user] pfcFwd0(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
   Call: (263) [system] is_list(_49286)
   Fail: (263) [system] is_list(_49286)
^  Redo: (262) [user] pfcFwd0(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Call: (263) [user] pfcFwd1(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Unify: (263) [user] pfcFwd1(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Call: (264) [user] fc_rule_check(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Unify: (264) [user] fc_rule_check(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Exit: (264) [user] fc_rule_check(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
   Call: (264) [system] copy_term(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _80068)
   Exit: (264) [system] copy_term(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Call: (264) [user] ignore(fcpt(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')))
^  Unify: (264) [system] ignore(user:fcpt(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')))
^  Call: (265) [user] fcpt(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Unify: (265) [user] fcpt(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Call: (266) [user] pfcGetTriggerQuick('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
^  Unify: (266) [user] pfcGetTriggerQuick('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
^  Call: (267) [user] clause('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), true)
^  Fail: (267) [user] clause('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), true)
^  Redo: (266) [user] pfcGetTriggerQuick('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
^  Call: (267) [user] pfc_call('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
^  Unify: (267) [user] pfc_call('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Call: (268) [system] var('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Fail: (268) [system] var('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
^  Redo: (267) [user] pfc_call('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
^  Unify: (267) [user] pfc_call('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Call: (268) [system] callable('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Exit: (268) [system] callable('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
^  Unify: (267) [user] pfc_call('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
^  Redo: (267) [user] pfc_call('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
^  Unify: (267) [user] pfc_call('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
^  Call: (268) [user] predicate_property('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), imported_from(system))
^  Unify: (268) [$syspreds] predicate_property(user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), imported_from(system))
   Call: (269) [system] nonvar(imported_from(system))
   Exit: (269) [system] nonvar(imported_from(system))
   Call: (269) [$syspreds] property_predicate(imported_from(system), user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Unify: (269) [$syspreds] property_predicate(imported_from(system), user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Call: (270) [$syspreds] define_or_generate(user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Unify: (270) [$syspreds] define_or_generate(user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Call: (271) [system] callable('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Exit: (271) [system] callable('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Call: (271) [system] atom(user)
   Exit: (271) [system] atom(user)
   Exit: (270) [$syspreds] define_or_generate(user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
^  Fail: (268) [$syspreds] predicate_property(user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), imported_from(system))
^  Redo: (267) [user] pfc_call('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
^  Unify: (267) [user] pfc_call('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
^  Call: (268) [user] predicate_property('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), built_in)
^  Unify: (268) [$syspreds] predicate_property(user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), built_in)
   Call: (269) [system] nonvar(built_in)
   Exit: (269) [system] nonvar(built_in)
   Call: (269) [$syspreds] property_predicate(built_in, user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Unify: (269) [$syspreds] property_predicate(built_in, user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Call: (270) [system] callable('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Exit: (270) [system] callable('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Call: (270) [$syspreds] goal_name_arity('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), _298140, _298142)
   Unify: (270) [$syspreds] goal_name_arity('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), _298140, _298142)
   Call: (271) [system] compound('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Exit: (271) [system] compound('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Call: (271) [system] compound_name_arity('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), _298140, _298142)
   Exit: (271) [system] compound_name_arity('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), '$pt$', 2)
   Exit: (270) [$syspreds] goal_name_arity('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), '$pt$', 2)
^  Call: (270) [$syspreds] current_predicate(user:'$pt$'/2)
^  Exit: (270) [$syspreds] current_predicate(user:'$pt$'/2)
^  Fail: (268) [$syspreds] predicate_property(user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), built_in)
^  Redo: (267) [user] pfc_call('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
^  Unify: (267) [user] pfc_call('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
^  Call: (268) [user] predicate_property('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), _348362)
^  Unify: (268) [$syspreds] predicate_property(user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), _353200)
   Call: (269) [system] nonvar(_357956)
^  Redo: (268) [$syspreds] predicate_property(user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), _358958)
^  Unify: (268) [$syspreds] predicate_property(user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), _363790)
   Call: (269) [$syspreds] define_or_generate(user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Unify: (269) [$syspreds] define_or_generate(user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Call: (270) [system] callable('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Exit: (270) [system] callable('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Call: (270) [system] atom(user)
   Exit: (270) [system] atom(user)
   Exit: (269) [$syspreds] define_or_generate(user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
^  Exit: (268) [$syspreds] predicate_property(user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), interpreted)
^  Unify: (267) [user] pfc_call('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
^  Call: (268) [user] predicate_property('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), number_of_clauses(_404168))
^  Unify: (268) [$syspreds] predicate_property(user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), number_of_clauses(_404168))
   Call: (269) [system] nonvar(number_of_clauses(_404168))
   Exit: (269) [system] nonvar(number_of_clauses(_404168))
   Call: (269) [$syspreds] property_predicate(number_of_clauses(_404168), user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Unify: (269) [$syspreds] property_predicate(number_of_clauses(_404168), user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Call: (270) [$syspreds] define_or_generate(user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Unify: (270) [$syspreds] define_or_generate(user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Call: (271) [system] callable('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Exit: (271) [system] callable('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Call: (271) [system] atom(user)
   Exit: (271) [system] atom(user)
   Exit: (270) [$syspreds] define_or_generate(user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
   Exit: (269) [$syspreds] property_predicate(number_of_clauses(0), user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
^  Exit: (268) [$syspreds] predicate_property(user:'$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), number_of_clauses(0))
^  Unify: (267) [user] pfc_call('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
^  Call: (268) [user] setup_call_cleanup(nb_current('$pfc_current_choice', _465788), (prolog_current_choice(_465798), push_current_choice(_465798), clause('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), _465820), pfc_call(_465820)), nb_setval('$pfc_current_choice', _465788))
^  Unify: (268) [system] setup_call_cleanup(user:nb_current('$pfc_current_choice', _465788), user:(prolog_current_choice(_465798), push_current_choice(_465798), clause('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), _465820), pfc_call(_465820)), user:nb_setval('$pfc_current_choice', _465788))
^  Call: (269) [system] sig_atomic(user:nb_current('$pfc_current_choice', _465788))
   Call: (271) [system] nb_current('$pfc_current_choice', _465788)
   Exit: (271) [system] nb_current('$pfc_current_choice', [])
^  Exit: (269) [system] sig_atomic(user:nb_current('$pfc_current_choice', []))
   Call: (270) [system] prolog_current_choice(_465798)
   Exit: (270) [system] prolog_current_choice(4165)
^  Call: (270) [user] push_current_choice(4165)
^  Unify: (270) [user] push_current_choice(4165)
   Call: (271) [system] nb_current('$pfc_current_choice', _482934)
   Exit: (271) [system] nb_current('$pfc_current_choice', [])
   Call: (271) [system] b_setval('$pfc_current_choice', [4165])
   Exit: (271) [system] b_setval('$pfc_current_choice', [4165])
^  Exit: (270) [user] push_current_choice(4165)
^  Call: (270) [user] clause('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), _465820)
^  Fail: (270) [user] clause('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), _465820)
   Call: (270) [$syspreds] nb_setval('$pfc_current_choice', [])
   Unify: (270) [$syspreds] nb_setval('$pfc_current_choice', [])
   Call: (271) [system] duplicate_term([], _499102)
   Exit: (271) [system] duplicate_term([], [])
   Call: (271) [system] nb_linkval('$pfc_current_choice', [])
   Exit: (271) [system] nb_linkval('$pfc_current_choice', [])
   Exit: (270) [$syspreds] nb_setval('$pfc_current_choice', [])
^  Fail: (268) [system] setup_call_cleanup(user:nb_current('$pfc_current_choice', _465788), user:(prolog_current_choice(_465798), push_current_choice(_465798), clause('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538), _465820), pfc_call(_465820)), user:nb_setval('$pfc_current_choice', _465788))
^  Fail: (267) [user] pfc_call('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
^  Fail: (266) [user] pfcGetTriggerQuick('$pt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _128538))
^  Redo: (265) [user] fcpt(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Unify: (265) [user] fcpt(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Exit: (265) [user] fcpt(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Exit: (264) [system] ignore(user:fcpt(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')))
^  Call: (264) [user] ignore(fcnt(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')))
^  Unify: (264) [system] ignore(user:fcnt(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')))
^  Call: (265) [user] fcnt(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Unify: (265) [user] fcnt(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Call: (266) [user] pfc_spft(_70330, _70416, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338))
^  Unify: (266) [user] pfc_spft(_70330, _75246, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338))
^  Call: (267) [user] pfcCallSystem('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
^  Unify: (267) [user] pfcCallSystem('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
^  Call: (268) [user] pfc_call('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
^  Unify: (268) [user] pfc_call('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Call: (269) [system] var('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Fail: (269) [system] var('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
^  Redo: (268) [user] pfc_call('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
^  Unify: (268) [user] pfc_call('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Call: (269) [system] callable('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Exit: (269) [system] callable('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
^  Unify: (268) [user] pfc_call('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
^  Redo: (268) [user] pfc_call('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
^  Unify: (268) [user] pfc_call('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
^  Call: (269) [user] predicate_property('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), imported_from(system))
^  Unify: (269) [$syspreds] predicate_property(user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), imported_from(system))
   Call: (270) [system] nonvar(imported_from(system))
   Exit: (270) [system] nonvar(imported_from(system))
   Call: (270) [$syspreds] property_predicate(imported_from(system), user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Unify: (270) [$syspreds] property_predicate(imported_from(system), user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Call: (271) [$syspreds] define_or_generate(user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Unify: (271) [$syspreds] define_or_generate(user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Call: (272) [system] callable('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Exit: (272) [system] callable('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Call: (272) [system] atom(user)
   Exit: (272) [system] atom(user)
   Exit: (271) [$syspreds] define_or_generate(user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
^  Fail: (269) [$syspreds] predicate_property(user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), imported_from(system))
^  Redo: (268) [user] pfc_call('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
^  Unify: (268) [user] pfc_call('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
^  Call: (269) [user] predicate_property('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), built_in)
^  Unify: (269) [$syspreds] predicate_property(user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), built_in)
   Call: (270) [system] nonvar(built_in)
   Exit: (270) [system] nonvar(built_in)
   Call: (270) [$syspreds] property_predicate(built_in, user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Unify: (270) [$syspreds] property_predicate(built_in, user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Call: (271) [system] callable('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Exit: (271) [system] callable('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Call: (271) [$syspreds] goal_name_arity('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), _235122, _235124)
   Unify: (271) [$syspreds] goal_name_arity('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), _235122, _235124)
   Call: (272) [system] compound('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Exit: (272) [system] compound('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Call: (272) [system] compound_name_arity('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), _235122, _235124)
   Exit: (272) [system] compound_name_arity('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), '$spft$', 3)
   Exit: (271) [$syspreds] goal_name_arity('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), '$spft$', 3)
^  Call: (271) [$syspreds] current_predicate(user:'$spft$'/3)
^  Exit: (271) [$syspreds] current_predicate(user:'$spft$'/3)
^  Fail: (269) [$syspreds] predicate_property(user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), built_in)
^  Redo: (268) [user] pfc_call('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
^  Unify: (268) [user] pfc_call('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
^  Call: (269) [user] predicate_property('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), _285344)
^  Unify: (269) [$syspreds] predicate_property(user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), _290182)
   Call: (270) [system] nonvar(_294938)
^  Redo: (269) [$syspreds] predicate_property(user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), _295940)
^  Unify: (269) [$syspreds] predicate_property(user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), _300772)
   Call: (270) [$syspreds] define_or_generate(user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Unify: (270) [$syspreds] define_or_generate(user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Call: (271) [system] callable('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Exit: (271) [system] callable('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Call: (271) [system] atom(user)
   Exit: (271) [system] atom(user)
   Exit: (270) [$syspreds] define_or_generate(user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
^  Exit: (269) [$syspreds] predicate_property(user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), interpreted)
^  Unify: (268) [user] pfc_call('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
^  Call: (269) [user] predicate_property('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), number_of_clauses(_341150))
^  Unify: (269) [$syspreds] predicate_property(user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), number_of_clauses(_341150))
   Call: (270) [system] nonvar(number_of_clauses(_341150))
   Exit: (270) [system] nonvar(number_of_clauses(_341150))
   Call: (270) [$syspreds] property_predicate(number_of_clauses(_341150), user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Unify: (270) [$syspreds] property_predicate(number_of_clauses(_341150), user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Call: (271) [$syspreds] define_or_generate(user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Unify: (271) [$syspreds] define_or_generate(user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Call: (272) [system] callable('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Exit: (272) [system] callable('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Call: (272) [system] atom(user)
   Exit: (272) [system] atom(user)
   Exit: (271) [$syspreds] define_or_generate(user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
   Exit: (270) [$syspreds] property_predicate(number_of_clauses(714), user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
^  Exit: (269) [$syspreds] predicate_property(user:'$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), number_of_clauses(714))
^  Unify: (268) [user] pfc_call('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
^  Call: (269) [user] setup_call_cleanup(nb_current('$pfc_current_choice', _402770), (prolog_current_choice(_402780), push_current_choice(_402780), clause('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), _402802), pfc_call(_402802)), nb_setval('$pfc_current_choice', _402770))
^  Unify: (269) [system] setup_call_cleanup(user:nb_current('$pfc_current_choice', _402770), user:(prolog_current_choice(_402780), push_current_choice(_402780), clause('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), _402802), pfc_call(_402802)), user:nb_setval('$pfc_current_choice', _402770))
^  Call: (270) [system] sig_atomic(user:nb_current('$pfc_current_choice', _402770))
   Call: (272) [system] nb_current('$pfc_current_choice', _402770)
   Exit: (272) [system] nb_current('$pfc_current_choice', [])
^  Exit: (270) [system] sig_atomic(user:nb_current('$pfc_current_choice', []))
   Call: (271) [system] prolog_current_choice(_402780)
   Exit: (271) [system] prolog_current_choice(4185)
^  Call: (271) [user] push_current_choice(4185)
^  Unify: (271) [user] push_current_choice(4185)
   Call: (272) [system] nb_current('$pfc_current_choice', _419916)
   Exit: (272) [system] nb_current('$pfc_current_choice', [])
   Call: (272) [system] b_setval('$pfc_current_choice', [4185])
   Exit: (272) [system] b_setval('$pfc_current_choice', [4185])
^  Exit: (271) [user] push_current_choice(4185)
^  Call: (271) [user] clause('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), _402802)
^  Fail: (271) [user] clause('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), _402802)
   Call: (271) [$syspreds] nb_setval('$pfc_current_choice', [])
   Unify: (271) [$syspreds] nb_setval('$pfc_current_choice', [])
   Call: (272) [system] duplicate_term([], _436084)
   Exit: (272) [system] duplicate_term([], [])
   Call: (272) [system] nb_linkval('$pfc_current_choice', [])
   Exit: (272) [system] nb_linkval('$pfc_current_choice', [])
   Exit: (271) [$syspreds] nb_setval('$pfc_current_choice', [])
^  Fail: (269) [system] setup_call_cleanup(user:nb_current('$pfc_current_choice', _402770), user:(prolog_current_choice(_402780), push_current_choice(_402780), clause('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)), _402802), pfc_call(_402802)), user:nb_setval('$pfc_current_choice', _402770))
^  Fail: (268) [user] pfc_call('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
^  Fail: (267) [user] pfcCallSystem('$spft$'(_70330, _80004, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338)))
^  Fail: (266) [user] pfc_spft(_70330, _455282, '$nt$'(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), _70336, _70338))
^  Redo: (265) [user] fcnt(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Unify: (265) [user] fcnt(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Exit: (265) [user] fcnt(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Exit: (264) [system] ignore(user:fcnt(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')))
^  Exit: (263) [user] pfcFwd1(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Exit: (262) [user] pfcFwd0(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Exit: (261) [locally_each] locally_each:wtl_how(locally_each:trusted_redo_call_cleanup, locally_each:(true==true), user:set_prolog_flag(occurs_check, true), user:pfcFwd0(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')), user:set_prolog_flag(occurs_check, true))
^  Exit: (260) [locally_each] locally_each:wtl(user, set_prolog_flag(occurs_check, true), user:pfcFwd0(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')), user:each_call_cleanup)
^  Exit: (259) [locally_each] locally_each:locally(user:set_prolog_flag(occurs_check, true), user:pfcFwd0(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')))
^  Exit: (258) [user] pfcFwd(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Exit: (257) [user] pfcEnqueue(direct, metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (256) [user] pfcEnqueue(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (254) [user] must_ex(pfcEnqueue(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Exit: (253) [user] pfcPost2(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (252) [user] pfcPost11(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (250) [locally_each] locally_each:wtl_how(locally_each:trusted_redo_call_cleanup, locally_each:(true==true), user:set_prolog_flag(occurs_check, true), user:catch(pfcPost11(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _5712, (notrace, wdmsg((metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')=>_5712)), trace)), user:set_prolog_flag(occurs_check, true))
^  Exit: (249) [locally_each] locally_each:wtl(user, set_prolog_flag(occurs_check, true), user:catch(pfcPost11(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _5712, (notrace, wdmsg((metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')=>_5712)), trace)), user:each_call_cleanup)
^  Exit: (248) [locally_each] locally_each:locally(user:set_prolog_flag(occurs_check, true), user:catch(pfcPost11(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _5712, (notrace, wdmsg((metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')=>_5712)), trace)))
^  Exit: (247) [user] pfcPost1(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (246) [user] pfcPost_rev((P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax), metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Exit: (245) [user] pfcPost(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (245) [user] pfcRun
^  Unify: (245) [user] pfcRun
^  Call: (246) [user] pfcGetSearch(direct)
^  Unify: (246) [user] pfcGetSearch(direct)
   Call: (247) [t_l] t_l:pfcSearchTL(_148744)
   Fail: (247) [t_l] t_l:pfcSearchTL(_148744)
^  Redo: (246) [user] pfcGetSearch(direct)
^  Call: (247) [user] pfcSearch(_151518)
^  Unify: (247) [user] pfcSearch(direct)
^  Exit: (247) [user] pfcSearch(direct)
   Call: (247) [system] direct=direct
   Exit: (247) [system] direct=direct
^  Exit: (246) [user] pfcGetSearch(direct)
^  Unify: (245) [user] pfcRun
^  Exit: (245) [user] pfcRun
^  Exit: (244) [user] pfcAdd(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), (P;HTML|mfl4(_5688, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (243) [user] pfcAdd(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Exit: (242) [user] pfcAdd_Now(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Exit: (241) [system] once(user:pfcAdd_Now(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')))
^  Exit: (240) [user] must_det_ll(user:pfcAdd_Now(metta_file('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')))
^  Call: (240) [user] must_det_ll(pfcAdd_Now(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))
^  Unify: (240) [user] must_det_ll(user:pfcAdd_Now(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))
^  Call: (241) [user] once(user:pfcAdd_Now(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))
^  Unify: (241) [system] once(user:pfcAdd_Now(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))
^  Call: (242) [user] pfcAdd_Now(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (242) [user] pfcAdd_Now(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (243) [user] current_predicate(pfcAdd/1)
^  Exit: (243) [user] current_predicate(pfcAdd/1)
^  Call: (243) [user] once_writeq_nl(pfcAdd(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))
^  Unify: (243) [user] once_writeq_nl(pfcAdd(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))
^  Call: (244) [user] clause(pfcTraceExecution, true)
^  Fail: (244) [user] clause(pfcTraceExecution, true)
^  Redo: (243) [user] once_writeq_nl(pfcAdd(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))
^  Exit: (243) [user] once_writeq_nl(pfcAdd(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))
^  Call: (243) [user] pfcAdd(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (243) [user] pfcAdd(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (244) [user] must_ex(current_why_UU(_251338))
^  Unify: (244) [user] must_ex(current_why_UU(_251338))
   Call: (246) [user] current_why_UU(_251338)
   Unify: (246) [user] current_why_UU(_251338)
^  Call: (247) [user] get_why_uu(_251338)
^  Unify: (247) [user] get_why_uu(_251338)
^  Call: (248) [user] findall(_256878, current_why(_256878), _256884)
^  Unify: (248) [$bags] findall(_256878, user:current_why(_256878), _256884)
^  Call: (249) [$bags] findall(_256878, user:current_why(_256878), _256884, [])
^  Unify: (249) [$bags] findall(_256878, user:current_why(_256878), _256884, [])
^  Call: (250) [$bags] cleanup_bag(findall_loop(_256878, user:current_why(_256878), _256884, []), '$destroy_findall_bag')
^  Unify: (250) [$bags] cleanup_bag('$bags':findall_loop(_256878, user:current_why(_256878), _256884, []), '$bags':'$destroy_findall_bag')
   Call: (251) [$bags] findall_loop(_256878, user:current_why(_256878), _256884, [])
   Unify: (251) [$bags] findall_loop(_256878, user:current_why(_256878), _256884, [])
^  Call: (252) [user] bugger:current_why(_256878)
^  Unify: (252) [user] bugger:current_why(_256878)
^  Call: (253) [user] bugger:current_why_data(_256878)
^  Unify: (253) [user] bugger:current_why_data(_256878)
   Call: (254) [system] nb_current('$current_why', wp(_256878, _268138))
   Fail: (254) [system] nb_current('$current_why', wp(_256878, _268138))
^  Redo: (253) [user] bugger:current_why_data(_256878)
^  Unify: (253) [user] bugger:current_why_data(_256878)
   Call: (254) [t_l] t_l:current_why_source(_256878)
   Fail: (254) [t_l] t_l:current_why_source(_256878)
^  Fail: (253) [user] bugger:current_why_data(_256878)
^  Redo: (252) [user] bugger:current_why(_256878)
^  Unify: (252) [user] bugger:current_why(mfl4(_275566, _275568, _275570, _275572))
^  Call: (254) [system] setup_call_cleanup('$notrace'(_276522, _276524), once(user:current_mfl4(_275566, _275568, _275570, _275572)), '$restore_trace'(_276522, _276524))
^  Unify: (254) [system] setup_call_cleanup(system:'$notrace'(_276522, _276524), system:once(user:current_mfl4(_275566, _275568, _275570, _275572)), system:'$restore_trace'(_276522, _276524))
^  Call: (255) [system] sig_atomic(system:'$notrace'(_276522, _276524))
^  Exit: (254) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:current_mfl4(_275566, user, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta', 1805)), system:'$restore_trace'(3, -1))
^  Exit: (252) [user] bugger:current_why(P;HTML|mfl4(_275566, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Redo: (251) [$bags] findall_loop(_256878, user:current_why(_256878), _256884, [])
   Exit: (251) [$bags] findall_loop(_256878, user:current_why(_256878), [P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], [])
^  Exit: (250) [$bags] cleanup_bag('$bags':findall_loop(_256878, user:current_why(_256878), [P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], []), '$bags':'$destroy_findall_bag')
^  Exit: (249) [$bags] findall(_256878, user:current_why(_256878), [P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], [])
^  Exit: (248) [$bags] findall(_256878, user:current_why(_256878), [P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Call: (248) [system] [P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]\==[]
   Exit: (248) [system] [P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]\==[]
^  Call: (248) [user] u_to_uu([P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _251338)
^  Unify: (248) [user] u_to_uu([P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], ([P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], ax))
   Call: (249) [system] var([P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Fail: (249) [system] var([P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
^  Redo: (248) [user] u_to_uu([P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _251338)
^  Unify: (248) [user] u_to_uu([P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], [P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Call: (249) [system] nonvar([P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Exit: (249) [system] nonvar([P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Call: (249) [system] [P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]=(_413290, _413292)
   Fail: (249) [system] [P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]=(_413290, _413292)
^  Redo: (248) [user] u_to_uu([P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _251338)
^  Unify: (248) [user] u_to_uu([P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _251338)
^  Call: (249) [user] logicmoo_util_terms:list_to_conjuncts([P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _443724)
^  Unify: (249) [user] logicmoo_util_terms:list_to_conjuncts([P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _443724)
^  Call: (250) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _443724)
^  Unify: (250) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], [P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Call: (251) [system] var([P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Fail: (251) [system] var([P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
^  Redo: (250) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _443724)
^  Unify: (250) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], [P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
^  Call: (251) [user] not(compound([P;HTML|mfl4(_293406, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]))
^  Unify: (251) [system] not(user:compound([P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]))
   Call: (252) [system] compound([P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
   Exit: (252) [system] compound([P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)])
^  Fail: (251) [system] not(user:compound([P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)]))
^  Redo: (250) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _5736)
^  Unify: (250) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], _5736)
^  Call: (251) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _5736)
^  Unify: (251) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Call: (252) [system] var(P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Fail: (252) [system] var(P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Redo: (251) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _5736)
^  Unify: (251) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Call: (252) [user] not(compound(P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)))
^  Unify: (252) [system] not(user:compound(P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)))
   Call: (253) [system] compound(P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Exit: (253) [system] compound(P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Fail: (252) [system] not(user:compound(P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)))
^  Redo: (251) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _5736)
^  Unify: (251) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Exit: (251) [user] logicmoo_util_terms:list_to_conjuncts(',', P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Exit: (250) [user] logicmoo_util_terms:list_to_conjuncts(',', [P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Exit: (249) [user] logicmoo_util_terms:list_to_conjuncts([P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Call: (249) [user] u_to_uu(P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _5690)
^  Unify: (249) [user] u_to_uu(P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), (P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
   Call: (250) [system] var(P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Fail: (250) [system] var(P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
^  Redo: (249) [user] u_to_uu(P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _5690)
^  Unify: (249) [user] u_to_uu(P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Call: (250) [system] nonvar(P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Exit: (250) [system] nonvar(P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805))
   Call: (250) [system] P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)=(_290956, _290958)
   Fail: (250) [system] P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)=(_290956, _290958)
^  Redo: (249) [user] u_to_uu(P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), _5690)
^  Unify: (249) [user] u_to_uu(P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), (P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (249) [user] u_to_uu(P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), (P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (248) [user] u_to_uu([P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805)], (P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (247) [user] get_why_uu((P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
   Exit: (246) [user] current_why_UU((P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (244) [user] must_ex(current_why_UU((P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Call: (244) [user] pfcAdd(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (244) [user] pfcAdd(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (245) [user] pfcPost(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (245) [user] pfcPost(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (246) [user] pfcPost_rev((P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax), user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (246) [user] pfcPost_rev((P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax), user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Call: (247) [system] is_list(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Fail: (247) [system] is_list(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Redo: (246) [user] pfcPost_rev((P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax), user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (247) [user] pfcPost1(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (247) [user] pfcPost1(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (248) [user] control_arg_types(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _492568)
^  Unify: (248) [user] control_arg_types(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _492568)
   Call: (249) [system] fail
   Fail: (249) [system] fail
^  Fail: (248) [user] control_arg_types(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _492568)
^  Redo: (247) [user] pfcPost1(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5716, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (247) [user] pfcPost1(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (248) [user] locally_each:locally(set_prolog_flag(occurs_check, true), catch(pfcPost11(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _14512, (notrace, wdmsg((user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')=>_14512)), trace)))
^  Unify: (248) [locally_each] locally_each:locally(user:set_prolog_flag(occurs_check, true), user:catch(pfcPost11(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _14512, (notrace, wdmsg((user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')=>_14512)), trace)))
^  Call: (249) [locally_each] locally_each:wtl(user, set_prolog_flag(occurs_check, true), user:catch(pfcPost11(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _14512, (notrace, wdmsg((user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')=>_14512)), trace)), user:each_call_cleanup)
^  Unify: (249) [locally_each] locally_each:wtl(user, set_prolog_flag(occurs_check, true), user:catch(pfcPost11(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _14512, (notrace, wdmsg((user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')=>_14512)), trace)), user:each_call_cleanup)
   Call: (250) [system] current_prolog_flag(occurs_check, _76218)
   Exit: (250) [system] current_prolog_flag(occurs_check, true)
^  Call: (250) [locally_each] locally_each:wtl_how(trusted_redo_call_cleanup, true==true, user:set_prolog_flag(occurs_check, true), user:catch(pfcPost11(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _14512, (notrace, wdmsg((user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')=>_14512)), trace)), user:set_prolog_flag(occurs_check, true))
^  Unify: (250) [locally_each] locally_each:wtl_how(locally_each:trusted_redo_call_cleanup, locally_each:(true==true), user:set_prolog_flag(occurs_check, true), user:catch(pfcPost11(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _14512, (notrace, wdmsg((user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')=>_14512)), trace)), user:set_prolog_flag(occurs_check, true))
   Call: (251) [system] true==true
   Exit: (251) [system] true==true
^  Call: (252) [user] pfcPost11(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (252) [user] pfcPost11(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (253) [user] must_ex(pfcAddSupport(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Unify: (253) [user] must_ex(pfcAddSupport(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Call: (255) [user] pfcAddSupport(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (255) [user] pfcAddSupport(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (256) [user] assert('$spft$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (256) [user] assert('$spft$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (255) [user] pfcAddSupport(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (253) [user] must_ex(pfcAddSupport(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Call: (253) [user] pfcUnique(post, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (253) [user] pfcUnique(post, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (254) [user] pfcUnique(post, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true)
^  Unify: (254) [user] pfcUnique(post, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true)
^  Call: (255) [user] is_asserted_exact(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true)
^  Unify: (255) [user] is_asserted_exact(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true)
^  Call: (256) [user] strip_module(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _254830, _254832)
^  Exit: (256) [user] strip_module(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (256) [user] is_asserted_exact(user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true)
^  Unify: (256) [user] is_asserted_exact(user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true)
   Call: (257) [system] _278064=user
   Exit: (257) [system] user=user
^  Call: (257) [user] clause(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true, _279934)
^  Fail: (257) [user] clause(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true, _279934)
^  Redo: (256) [user] is_asserted_exact(user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true)
^  Call: (257) [user] clause(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true, _294456)
^  Fail: (257) [user] clause(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true, _294456)
^  Fail: (256) [user] is_asserted_exact(user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true)
^  Fail: (255) [user] is_asserted_exact(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true)
^  Redo: (254) [user] pfcUnique(post, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true)
^  Exit: (254) [user] pfcUnique(post, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true)
^  Exit: (253) [user] pfcUnique(post, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (253) [user] pfcPost2(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (253) [user] pfcPost2(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (254) [user] must_ex(once((\+ \+is_asserted_exact(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'));assert(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))))
^  Unify: (254) [user] must_ex(once((\+ \+is_asserted_exact(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'));assert(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))))
^  Call: (256) [user] once((\+ \+is_asserted_exact(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'));assert(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))))
^  Unify: (256) [system] once(user:(\+ \+is_asserted_exact(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'));assert(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))))
^  Call: (258) [user] is_asserted_exact(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (258) [user] is_asserted_exact(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (259) [user] strip_module(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _395868, _395870)
^  Exit: (259) [user] strip_module(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (259) [user] hook_database:expand_to_hb(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _409442, _409444)
^  Unify: (259) [user] hook_database:expand_to_hb(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true)
   Call: (260) [system] var(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Fail: (260) [system] var(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Redo: (259) [user] hook_database:expand_to_hb(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _409442, _409444)
^  Unify: (259) [user] hook_database:expand_to_hb(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true)
^  Exit: (259) [user] hook_database:expand_to_hb(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true)
^  Call: (259) [user] is_asserted_exact(user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true)
^  Unify: (259) [user] is_asserted_exact(user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true)
   Call: (260) [system] _464624=user
   Exit: (260) [system] user=user
^  Call: (260) [user] clause(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true, _466494)
^  Fail: (260) [user] clause(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true, _466494)
^  Redo: (259) [user] is_asserted_exact(user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true)
^  Call: (260) [user] clause(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true, _481016)
^  Fail: (260) [user] clause(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true, _481016)
^  Fail: (259) [user] is_asserted_exact(user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), true)
^  Fail: (258) [user] is_asserted_exact(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (258) [user] assert(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Exit: (258) [user] assert(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Exit: (256) [system] once(user:(\+ \+is_asserted_exact(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'));assert(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))))
^  Exit: (254) [user] must_ex(once((\+ \+is_asserted_exact(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'));assert(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))))
^  Call: (254) [user] must_ex(pfcTraceAdd(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Unify: (254) [user] must_ex(pfcTraceAdd(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Call: (256) [user] pfcTraceAdd(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (256) [user] pfcTraceAdd(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (257) [user] pfcTraceAddPrint(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (257) [user] pfcTraceAddPrint(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (258) [user] pfcIsTraced(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (258) [user] pfcIsTraced(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (259) [user] pfcIsNotTraced(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (259) [user] pfcIsNotTraced(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (260) [user] compound_eles(1, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _99030)
^  Unify: (260) [user] compound_eles(1, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _99030)
   Call: (261) [system] var(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Fail: (261) [system] var(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Redo: (260) [user] compound_eles(1, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _99030)
^  Unify: (260) [user] compound_eles(1, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _99030)
   Call: (261) [system] compound(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Exit: (261) [system] compound(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Call: (261) [system] 1<1
   Fail: (261) [system] 1<1
^  Redo: (260) [user] compound_eles(1, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _99030)
^  Unify: (260) [user] compound_eles(1, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _99030)
   Call: (261) [system] _149162 is 1+ -1
   Exit: (261) [system] 0 is 1+ -1
^  Call: (261) [user] compound_eles(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _151020)
^  Unify: (261) [user] compound_eles(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _151020)
   Call: (262) [system] is_list(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Fail: (262) [system] is_list(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Redo: (261) [user] compound_eles(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _151020)
^  Unify: (261) [user] compound_eles(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _151020)
   Call: (262) [system] compound(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Exit: (262) [system] compound(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Call: (262) [system] compound_name_arguments(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _189614, _189616)
   Exit: (262) [system] compound_name_arguments(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), :, [user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')])
   Call: (262) [lists] lists:member(_151020, [:, user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')])
   Unify: (262) [lists] lists:member(_151020, [:, user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')])
   Call: (263) [lists] lists:member_([user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], _151020, :)
   Unify: (263) [lists] lists:member_([user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], :, :)
   Exit: (263) [lists] lists:member_([user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], :, :)
   Exit: (262) [lists] lists:member(:, [:, user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')])
^  Exit: (261) [user] compound_eles(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), :)
^  Call: (261) [user] compound_eles(0, :, _99030)
^  Unify: (261) [user] compound_eles(0, :, _99030)
   Call: (262) [system] var(:)
   Fail: (262) [system] var(:)
^  Redo: (261) [user] compound_eles(0, :, _99030)
^  Unify: (261) [user] compound_eles(0, :, _99030)
   Call: (262) [system] compound(:)
   Fail: (262) [system] compound(:)
^  Redo: (261) [user] compound_eles(0, :, _99030)
   Call: (262) [system] _99030=(:)
   Exit: (262) [system] (:)=(:)
^  Exit: (261) [user] compound_eles(0, :, :)
^  Exit: (260) [user] compound_eles(1, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), :)
^  Call: (260) [user] pfcIgnored(:)
^  Fail: (260) [user] pfcIgnored(:)
   Redo: (263) [lists] lists:member_([user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], _151020, :)
   Unify: (263) [lists] lists:member_([user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], _151020, :)
   Call: (264) [lists] lists:member_([loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], _151020, user)
   Unify: (264) [lists] lists:member_([loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], user, user)
   Exit: (264) [lists] lists:member_([loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], user, user)
   Exit: (263) [lists] lists:member_([user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], user, :)
   Exit: (262) [lists] lists:member(user, [:, user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')])
^  Exit: (261) [user] compound_eles(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user)
^  Call: (261) [user] compound_eles(0, user, _99030)
^  Unify: (261) [user] compound_eles(0, user, _99030)
   Call: (262) [system] var(user)
   Fail: (262) [system] var(user)
^  Redo: (261) [user] compound_eles(0, user, _99030)
^  Unify: (261) [user] compound_eles(0, user, _99030)
   Call: (262) [system] compound(user)
   Fail: (262) [system] compound(user)
^  Redo: (261) [user] compound_eles(0, user, _99030)
   Call: (262) [system] _99030=user
   Exit: (262) [system] user=user
^  Exit: (261) [user] compound_eles(0, user, user)
^  Exit: (260) [user] compound_eles(1, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user)
^  Call: (260) [user] pfcIgnored(user)
^  Fail: (260) [user] pfcIgnored(user)
   Redo: (264) [lists] lists:member_([loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], _151020, user)
   Unify: (264) [lists] lists:member_([loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], _151020, user)
   Call: (265) [lists] lists:member_([], _151020, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Unify: (265) [lists] lists:member_([], loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Exit: (265) [lists] lists:member_([], loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Exit: (264) [lists] lists:member_([loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user)
   Exit: (263) [lists] lists:member_([user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), :)
   Exit: (262) [lists] lists:member(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), [:, user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')])
^  Exit: (261) [user] compound_eles(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (261) [user] compound_eles(0, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _99030)
^  Unify: (261) [user] compound_eles(0, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _99030)
   Call: (262) [system] var(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Fail: (262) [system] var(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Redo: (261) [user] compound_eles(0, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _99030)
^  Unify: (261) [user] compound_eles(0, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _99030)
   Call: (262) [system] compound(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Exit: (262) [system] compound(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Call: (262) [system] 0<1
   Exit: (262) [system] 0<1
   Call: (262) [system] _99030=loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (262) [system] loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')=loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Exit: (261) [user] compound_eles(0, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Exit: (260) [user] compound_eles(1, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (260) [user] pfcIgnored(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Fail: (260) [user] pfcIgnored(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Fail: (259) [user] pfcIsNotTraced(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Redo: (258) [user] pfcIsTraced(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (258) [user] pfcIsTraced(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (259) [user] compound_eles(1, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _473694)
^  Unify: (259) [user] compound_eles(1, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _473694)
   Call: (260) [system] var(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Fail: (260) [system] var(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Redo: (259) [user] compound_eles(1, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _473694)
^  Unify: (259) [user] compound_eles(1, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _473694)
   Call: (260) [system] compound(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Exit: (260) [system] compound(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Call: (260) [system] 1<1
   Fail: (260) [system] 1<1
^  Redo: (259) [user] compound_eles(1, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _473694)
^  Unify: (259) [user] compound_eles(1, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _5852)
   Call: (260) [system] _6824 is 1+ -1
   Exit: (260) [system] 0 is 1+ -1
^  Call: (260) [user] compound_eles(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _8682)
^  Unify: (260) [user] compound_eles(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _8682)
   Call: (261) [system] is_list(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Fail: (261) [system] is_list(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Redo: (260) [user] compound_eles(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _8682)
^  Unify: (260) [user] compound_eles(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _8682)
   Call: (261) [system] compound(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Exit: (261) [system] compound(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Call: (261) [system] compound_name_arguments(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _47276, _47278)
   Exit: (261) [system] compound_name_arguments(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), :, [user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')])
   Call: (261) [lists] lists:member(_8682, [:, user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')])
   Unify: (261) [lists] lists:member(_8682, [:, user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')])
   Call: (262) [lists] lists:member_([user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], _8682, :)
   Unify: (262) [lists] lists:member_([user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], :, :)
   Exit: (262) [lists] lists:member_([user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], :, :)
   Exit: (261) [lists] lists:member(:, [:, user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')])
^  Exit: (260) [user] compound_eles(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), :)
^  Call: (260) [user] compound_eles(0, :, _5852)
^  Unify: (260) [user] compound_eles(0, :, _5852)
   Call: (261) [system] var(:)
   Fail: (261) [system] var(:)
^  Redo: (260) [user] compound_eles(0, :, _5852)
^  Unify: (260) [user] compound_eles(0, :, _5852)
   Call: (261) [system] compound(:)
   Fail: (261) [system] compound(:)
^  Redo: (260) [user] compound_eles(0, :, _5852)
   Call: (261) [system] _5852=(:)
   Exit: (261) [system] (:)=(:)
^  Exit: (260) [user] compound_eles(0, :, :)
^  Exit: (259) [user] compound_eles(1, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), :)
^  Call: (259) [user] pfcTraced(:)
^  Fail: (259) [user] pfcTraced(:)
   Redo: (262) [lists] lists:member_([user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], _8682, :)
   Unify: (262) [lists] lists:member_([user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], _8682, :)
   Call: (263) [lists] lists:member_([loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], _8682, user)
   Unify: (263) [lists] lists:member_([loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], user, user)
   Exit: (263) [lists] lists:member_([loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], user, user)
   Exit: (262) [lists] lists:member_([user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], user, :)
   Exit: (261) [lists] lists:member(user, [:, user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')])
^  Exit: (260) [user] compound_eles(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user)
^  Call: (260) [user] compound_eles(0, user, _5852)
^  Unify: (260) [user] compound_eles(0, user, _5852)
   Call: (261) [system] var(user)
   Fail: (261) [system] var(user)
^  Redo: (260) [user] compound_eles(0, user, _5852)
^  Unify: (260) [user] compound_eles(0, user, _5852)
   Call: (261) [system] compound(user)
   Fail: (261) [system] compound(user)
^  Redo: (260) [user] compound_eles(0, user, _5852)
   Call: (261) [system] _5852=user
   Exit: (261) [system] user=user
^  Exit: (260) [user] compound_eles(0, user, user)
^  Exit: (259) [user] compound_eles(1, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user)
^  Call: (259) [user] pfcTraced(user)
^  Fail: (259) [user] pfcTraced(user)
   Redo: (263) [lists] lists:member_([loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], _8682, user)
   Unify: (263) [lists] lists:member_([loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], _8682, user)
   Call: (264) [lists] lists:member_([], _8682, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Unify: (264) [lists] lists:member_([], loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Exit: (264) [lists] lists:member_([], loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Exit: (263) [lists] lists:member_([loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user)
   Exit: (262) [lists] lists:member_([user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')], loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), :)
   Exit: (261) [lists] lists:member(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), [:, user, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')])
^  Exit: (260) [user] compound_eles(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (260) [user] compound_eles(0, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _5852)
^  Unify: (260) [user] compound_eles(0, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _5852)
   Call: (261) [system] var(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Fail: (261) [system] var(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Redo: (260) [user] compound_eles(0, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _5852)
^  Unify: (260) [user] compound_eles(0, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _5852)
   Call: (261) [system] compound(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Exit: (261) [system] compound(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Call: (261) [system] 0<1
   Exit: (261) [system] 0<1
   Call: (261) [system] _5852=loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (261) [system] loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')=loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Exit: (260) [user] compound_eles(0, loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Exit: (259) [user] compound_eles(1, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (259) [user] pfcTraced(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Fail: (259) [user] pfcTraced(loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Fail: (258) [user] pfcIsTraced(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Redo: (257) [user] pfcTraceAddPrint(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (257) [user] pfcTraceAddPrint(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (257) [user] pfcTraceAddPrint(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (257) [user] pfcTraceBreak(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (257) [user] pfcTraceBreak(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (258) [user] pfcSpied(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), +)
^  Fail: (258) [user] pfcSpied(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), +)
^  Redo: (257) [user] pfcTraceBreak(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (257) [user] pfcTraceBreak(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (256) [user] pfcTraceAdd(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (254) [user] must_ex(pfcTraceAdd(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Call: (254) [user] must_ex(pfcEnqueue(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Unify: (254) [user] must_ex(pfcEnqueue(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Call: (256) [user] pfcEnqueue(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (256) [user] pfcEnqueue(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (257) [user] pfcGetSearch(_480902)
^  Unify: (257) [user] pfcGetSearch(_480902)
   Call: (258) [t_l] t_l:pfcSearchTL(_482752)
   Fail: (258) [t_l] t_l:pfcSearchTL(_482752)
^  Redo: (257) [user] pfcGetSearch(_480902)
^  Call: (258) [user] pfcSearch(_485526)
^  Unify: (258) [user] pfcSearch(direct)
^  Exit: (258) [user] pfcSearch(direct)
   Call: (258) [system] _480902=direct
   Exit: (258) [system] direct=direct
^  Exit: (257) [user] pfcGetSearch(direct)
^  Call: (257) [user] pfcEnqueue(direct, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Unify: (257) [user] pfcEnqueue(direct, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
   Call: (258) [system] direct=direct
   Exit: (258) [system] direct=direct
^  Call: (258) [user] pfcFwd(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (258) [user] pfcFwd(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (259) [user] control_arg_types(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _8464)
^  Unify: (259) [user] control_arg_types(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _8464)
   Call: (260) [system] fail
   Fail: (260) [system] fail
^  Fail: (259) [user] control_arg_types(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _8464)
^  Redo: (258) [user] pfcFwd(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (258) [user] pfcFwd(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (259) [user] locally_each:locally(set_prolog_flag(occurs_check, true), pfcFwd0(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))
^  Unify: (259) [locally_each] locally_each:locally(user:set_prolog_flag(occurs_check, true), user:pfcFwd0(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))
^  Call: (260) [locally_each] locally_each:wtl(user, set_prolog_flag(occurs_check, true), user:pfcFwd0(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')), user:each_call_cleanup)
^  Unify: (260) [locally_each] locally_each:wtl(user, set_prolog_flag(occurs_check, true), user:pfcFwd0(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')), user:each_call_cleanup)
   Call: (261) [system] current_prolog_flag(occurs_check, _53808)
   Exit: (261) [system] current_prolog_flag(occurs_check, true)
^  Call: (261) [locally_each] locally_each:wtl_how(trusted_redo_call_cleanup, true==true, user:set_prolog_flag(occurs_check, true), user:pfcFwd0(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')), user:set_prolog_flag(occurs_check, true))
^  Unify: (261) [locally_each] locally_each:wtl_how(locally_each:trusted_redo_call_cleanup, locally_each:(true==true), user:set_prolog_flag(occurs_check, true), user:pfcFwd0(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')), user:set_prolog_flag(occurs_check, true))
   Call: (262) [system] true==true
   Exit: (262) [system] true==true
^  Call: (262) [user] pfcFwd0(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (262) [user] pfcFwd0(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Call: (263) [system] is_list(_76896)
   Fail: (263) [system] is_list(_76896)
^  Redo: (262) [user] pfcFwd0(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (263) [user] pfcFwd1(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (263) [user] pfcFwd1(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (264) [user] fc_rule_check(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (264) [user] fc_rule_check(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Exit: (264) [user] fc_rule_check(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Call: (264) [system] copy_term(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _107678)
   Exit: (264) [system] copy_term(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (264) [user] ignore(fcpt(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))
^  Unify: (264) [system] ignore(user:fcpt(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))
^  Call: (265) [user] fcpt(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (265) [user] fcpt(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (266) [user] pfcGetTriggerQuick('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
^  Unify: (266) [user] pfcGetTriggerQuick('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
^  Call: (267) [user] clause('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), true)
^  Fail: (267) [user] clause('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), true)
^  Redo: (266) [user] pfcGetTriggerQuick('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
^  Call: (267) [user] pfc_call('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
^  Unify: (267) [user] pfc_call('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Call: (268) [system] var('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Fail: (268) [system] var('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
^  Redo: (267) [user] pfc_call('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
^  Unify: (267) [user] pfc_call('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Call: (268) [system] callable('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Exit: (268) [system] callable('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
^  Unify: (267) [user] pfc_call('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
^  Redo: (267) [user] pfc_call('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
^  Unify: (267) [user] pfc_call('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
^  Call: (268) [user] predicate_property('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), imported_from(system))
^  Unify: (268) [$syspreds] predicate_property(user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), imported_from(system))
   Call: (269) [system] nonvar(imported_from(system))
   Exit: (269) [system] nonvar(imported_from(system))
   Call: (269) [$syspreds] property_predicate(imported_from(system), user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Unify: (269) [$syspreds] property_predicate(imported_from(system), user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Call: (270) [$syspreds] define_or_generate(user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Unify: (270) [$syspreds] define_or_generate(user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Call: (271) [system] callable('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Exit: (271) [system] callable('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Call: (271) [system] atom(user)
   Exit: (271) [system] atom(user)
   Exit: (270) [$syspreds] define_or_generate(user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
^  Fail: (268) [$syspreds] predicate_property(user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), imported_from(system))
^  Redo: (267) [user] pfc_call('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
^  Unify: (267) [user] pfc_call('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
^  Call: (268) [user] predicate_property('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), built_in)
^  Unify: (268) [$syspreds] predicate_property(user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), built_in)
   Call: (269) [system] nonvar(built_in)
   Exit: (269) [system] nonvar(built_in)
   Call: (269) [$syspreds] property_predicate(built_in, user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Unify: (269) [$syspreds] property_predicate(built_in, user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Call: (270) [system] callable('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Exit: (270) [system] callable('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Call: (270) [$syspreds] goal_name_arity('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), _325750, _325752)
   Unify: (270) [$syspreds] goal_name_arity('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), _325750, _325752)
   Call: (271) [system] compound('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Exit: (271) [system] compound('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Call: (271) [system] compound_name_arity('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), _325750, _325752)
   Exit: (271) [system] compound_name_arity('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), '$pt$', 2)
   Exit: (270) [$syspreds] goal_name_arity('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), '$pt$', 2)
^  Call: (270) [$syspreds] current_predicate(user:'$pt$'/2)
^  Exit: (270) [$syspreds] current_predicate(user:'$pt$'/2)
^  Fail: (268) [$syspreds] predicate_property(user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), built_in)
^  Redo: (267) [user] pfc_call('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
^  Unify: (267) [user] pfc_call('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
^  Call: (268) [user] predicate_property('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), _375972)
^  Unify: (268) [$syspreds] predicate_property(user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), _380810)
   Call: (269) [system] nonvar(_385566)
^  Redo: (268) [$syspreds] predicate_property(user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), _386568)
^  Unify: (268) [$syspreds] predicate_property(user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), _391400)
   Call: (269) [$syspreds] define_or_generate(user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Unify: (269) [$syspreds] define_or_generate(user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Call: (270) [system] callable('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Exit: (270) [system] callable('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Call: (270) [system] atom(user)
   Exit: (270) [system] atom(user)
   Exit: (269) [$syspreds] define_or_generate(user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
^  Exit: (268) [$syspreds] predicate_property(user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), interpreted)
^  Unify: (267) [user] pfc_call('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
^  Call: (268) [user] predicate_property('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), number_of_clauses(_431778))
^  Unify: (268) [$syspreds] predicate_property(user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), number_of_clauses(_431778))
   Call: (269) [system] nonvar(number_of_clauses(_431778))
   Exit: (269) [system] nonvar(number_of_clauses(_431778))
   Call: (269) [$syspreds] property_predicate(number_of_clauses(_431778), user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Unify: (269) [$syspreds] property_predicate(number_of_clauses(_431778), user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Call: (270) [$syspreds] define_or_generate(user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Unify: (270) [$syspreds] define_or_generate(user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Call: (271) [system] callable('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Exit: (271) [system] callable('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Call: (271) [system] atom(user)
   Exit: (271) [system] atom(user)
   Exit: (270) [$syspreds] define_or_generate(user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
   Exit: (269) [$syspreds] property_predicate(number_of_clauses(0), user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
^  Exit: (268) [$syspreds] predicate_property(user:'$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), number_of_clauses(0))
^  Unify: (267) [user] pfc_call('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148))
^  Call: (268) [user] setup_call_cleanup(nb_current('$pfc_current_choice', _493398), (prolog_current_choice(_493408), push_current_choice(_493408), clause('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), _493430), pfc_call(_493430)), nb_setval('$pfc_current_choice', _493398))
^  Unify: (268) [system] setup_call_cleanup(user:nb_current('$pfc_current_choice', _493398), user:(prolog_current_choice(_493408), push_current_choice(_493408), clause('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), _493430), pfc_call(_493430)), user:nb_setval('$pfc_current_choice', _493398))
^  Call: (269) [system] sig_atomic(user:nb_current('$pfc_current_choice', _493398))
   Call: (271) [system] nb_current('$pfc_current_choice', _493398)
   Exit: (271) [system] nb_current('$pfc_current_choice', [])
^  Exit: (269) [system] sig_atomic(user:nb_current('$pfc_current_choice', []))
   Call: (270) [system] prolog_current_choice(_493408)
   Exit: (270) [system] prolog_current_choice(4165)
^  Call: (270) [user] push_current_choice(4165)
^  Unify: (270) [user] push_current_choice(4165)
   Call: (271) [system] nb_current('$pfc_current_choice', _510544)
   Exit: (271) [system] nb_current('$pfc_current_choice', [])
   Call: (271) [system] b_setval('$pfc_current_choice', [4165])
   Exit: (271) [system] b_setval('$pfc_current_choice', [4165])
^  Exit: (270) [user] push_current_choice(4165)
^  Call: (270) [user] clause('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _156148), _493430)
^  Fail: (270) [user] clause('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _5950), _5988)
   Call: (270) [$syspreds] nb_setval('$pfc_current_choice', [])
   Unify: (270) [$syspreds] nb_setval('$pfc_current_choice', [])
   Call: (271) [system] duplicate_term([], _9136)
   Exit: (271) [system] duplicate_term([], [])
   Call: (271) [system] nb_linkval('$pfc_current_choice', [])
   Exit: (271) [system] nb_linkval('$pfc_current_choice', [])
   Exit: (270) [$syspreds] nb_setval('$pfc_current_choice', [])
^  Fail: (268) [system] setup_call_cleanup(user:nb_current('$pfc_current_choice', _5956), user:(prolog_current_choice(_5966), push_current_choice(_5966), clause('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _5950), _5988), pfc_call(_5988)), user:nb_setval('$pfc_current_choice', _5956))
^  Fail: (267) [user] pfc_call('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _5950))
^  Fail: (266) [user] pfcGetTriggerQuick('$pt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _5950))
^  Redo: (265) [user] fcpt(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (265) [user] fcpt(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Exit: (265) [user] fcpt(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Exit: (264) [system] ignore(user:fcpt(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))
^  Call: (264) [user] ignore(fcnt(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))
^  Unify: (264) [system] ignore(user:fcnt(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))
^  Call: (265) [user] fcnt(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (265) [user] fcnt(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (266) [user] pfc_spft(_98068, _98154, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076))
^  Unify: (266) [user] pfc_spft(_98068, _102984, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076))
^  Call: (267) [user] pfcCallSystem('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
^  Unify: (267) [user] pfcCallSystem('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
^  Call: (268) [user] pfc_call('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
^  Unify: (268) [user] pfc_call('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Call: (269) [system] var('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Fail: (269) [system] var('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
^  Redo: (268) [user] pfc_call('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
^  Unify: (268) [user] pfc_call('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Call: (269) [system] callable('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Exit: (269) [system] callable('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
^  Unify: (268) [user] pfc_call('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
^  Redo: (268) [user] pfc_call('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
^  Unify: (268) [user] pfc_call('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
^  Call: (269) [user] predicate_property('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), imported_from(system))
^  Unify: (269) [$syspreds] predicate_property(user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), imported_from(system))
   Call: (270) [system] nonvar(imported_from(system))
   Exit: (270) [system] nonvar(imported_from(system))
   Call: (270) [$syspreds] property_predicate(imported_from(system), user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Unify: (270) [$syspreds] property_predicate(imported_from(system), user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Call: (271) [$syspreds] define_or_generate(user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Unify: (271) [$syspreds] define_or_generate(user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Call: (272) [system] callable('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Exit: (272) [system] callable('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Call: (272) [system] atom(user)
   Exit: (272) [system] atom(user)
   Exit: (271) [$syspreds] define_or_generate(user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
^  Fail: (269) [$syspreds] predicate_property(user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), imported_from(system))
^  Redo: (268) [user] pfc_call('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
^  Unify: (268) [user] pfc_call('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
^  Call: (269) [user] predicate_property('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), built_in)
^  Unify: (269) [$syspreds] predicate_property(user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), built_in)
   Call: (270) [system] nonvar(built_in)
   Exit: (270) [system] nonvar(built_in)
   Call: (270) [$syspreds] property_predicate(built_in, user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Unify: (270) [$syspreds] property_predicate(built_in, user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Call: (271) [system] callable('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Exit: (271) [system] callable('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Call: (271) [$syspreds] goal_name_arity('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), _262860, _262862)
   Unify: (271) [$syspreds] goal_name_arity('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), _262860, _262862)
   Call: (272) [system] compound('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Exit: (272) [system] compound('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Call: (272) [system] compound_name_arity('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), _262860, _262862)
   Exit: (272) [system] compound_name_arity('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), '$spft$', 3)
   Exit: (271) [$syspreds] goal_name_arity('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), '$spft$', 3)
^  Call: (271) [$syspreds] current_predicate(user:'$spft$'/3)
^  Exit: (271) [$syspreds] current_predicate(user:'$spft$'/3)
^  Fail: (269) [$syspreds] predicate_property(user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), built_in)
^  Redo: (268) [user] pfc_call('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
^  Unify: (268) [user] pfc_call('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
^  Call: (269) [user] predicate_property('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), _313082)
^  Unify: (269) [$syspreds] predicate_property(user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), _317920)
   Call: (270) [system] nonvar(_322676)
^  Redo: (269) [$syspreds] predicate_property(user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), _323678)
^  Unify: (269) [$syspreds] predicate_property(user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), _328510)
   Call: (270) [$syspreds] define_or_generate(user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Unify: (270) [$syspreds] define_or_generate(user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Call: (271) [system] callable('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Exit: (271) [system] callable('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Call: (271) [system] atom(user)
   Exit: (271) [system] atom(user)
   Exit: (270) [$syspreds] define_or_generate(user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
^  Exit: (269) [$syspreds] predicate_property(user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), interpreted)
^  Unify: (268) [user] pfc_call('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
^  Call: (269) [user] predicate_property('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), number_of_clauses(_368888))
^  Unify: (269) [$syspreds] predicate_property(user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), number_of_clauses(_368888))
   Call: (270) [system] nonvar(number_of_clauses(_368888))
   Exit: (270) [system] nonvar(number_of_clauses(_368888))
   Call: (270) [$syspreds] property_predicate(number_of_clauses(_368888), user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Unify: (270) [$syspreds] property_predicate(number_of_clauses(_368888), user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Call: (271) [$syspreds] define_or_generate(user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Unify: (271) [$syspreds] define_or_generate(user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Call: (272) [system] callable('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Exit: (272) [system] callable('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Call: (272) [system] atom(user)
   Exit: (272) [system] atom(user)
   Exit: (271) [$syspreds] define_or_generate(user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
   Exit: (270) [$syspreds] property_predicate(number_of_clauses(715), user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
^  Exit: (269) [$syspreds] predicate_property(user:'$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), number_of_clauses(715))
^  Unify: (268) [user] pfc_call('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
^  Call: (269) [user] setup_call_cleanup(nb_current('$pfc_current_choice', _430508), (prolog_current_choice(_430518), push_current_choice(_430518), clause('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), _430540), pfc_call(_430540)), nb_setval('$pfc_current_choice', _430508))
^  Unify: (269) [system] setup_call_cleanup(user:nb_current('$pfc_current_choice', _430508), user:(prolog_current_choice(_430518), push_current_choice(_430518), clause('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), _430540), pfc_call(_430540)), user:nb_setval('$pfc_current_choice', _430508))
^  Call: (270) [system] sig_atomic(user:nb_current('$pfc_current_choice', _430508))
   Call: (272) [system] nb_current('$pfc_current_choice', _430508)
   Exit: (272) [system] nb_current('$pfc_current_choice', [])
^  Exit: (270) [system] sig_atomic(user:nb_current('$pfc_current_choice', []))
   Call: (271) [system] prolog_current_choice(_430518)
   Exit: (271) [system] prolog_current_choice(4185)
^  Call: (271) [user] push_current_choice(4185)
^  Unify: (271) [user] push_current_choice(4185)
   Call: (272) [system] nb_current('$pfc_current_choice', _447654)
   Exit: (272) [system] nb_current('$pfc_current_choice', [])
   Call: (272) [system] b_setval('$pfc_current_choice', [4185])
   Exit: (272) [system] b_setval('$pfc_current_choice', [4185])
^  Exit: (271) [user] push_current_choice(4185)
^  Call: (271) [user] clause('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), _430540)
^  Fail: (271) [user] clause('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), _430540)
   Call: (271) [$syspreds] nb_setval('$pfc_current_choice', [])
   Unify: (271) [$syspreds] nb_setval('$pfc_current_choice', [])
   Call: (272) [system] duplicate_term([], _463822)
   Exit: (272) [system] duplicate_term([], [])
   Call: (272) [system] nb_linkval('$pfc_current_choice', [])
   Exit: (272) [system] nb_linkval('$pfc_current_choice', [])
   Exit: (271) [$syspreds] nb_setval('$pfc_current_choice', [])
^  Fail: (269) [system] setup_call_cleanup(user:nb_current('$pfc_current_choice', _430508), user:(prolog_current_choice(_430518), push_current_choice(_430518), clause('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)), _430540), pfc_call(_430540)), user:nb_setval('$pfc_current_choice', _430508))
^  Fail: (268) [user] pfc_call('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
^  Fail: (267) [user] pfcCallSystem('$spft$'(_98068, _107742, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076)))
^  Fail: (266) [user] pfc_spft(_98068, _483020, '$nt$'(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), _98074, _98076))
^  Redo: (265) [user] fcnt(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (265) [user] fcnt(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Exit: (265) [user] fcnt(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Exit: (264) [system] ignore(user:fcnt(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))
^  Exit: (263) [user] pfcFwd1(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Exit: (262) [user] pfcFwd0(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Exit: (261) [locally_each] locally_each:wtl_how(locally_each:trusted_redo_call_cleanup, locally_each:(true==true), user:set_prolog_flag(occurs_check, true), user:pfcFwd0(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')), user:set_prolog_flag(occurs_check, true))
^  Exit: (260) [locally_each] locally_each:wtl(user, set_prolog_flag(occurs_check, true), user:pfcFwd0(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')), user:each_call_cleanup)
^  Exit: (259) [locally_each] locally_each:locally(user:set_prolog_flag(occurs_check, true), user:pfcFwd0(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))
^  Exit: (258) [user] pfcFwd(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Exit: (257) [user] pfcEnqueue(direct, user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (256) [user] pfcEnqueue(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (254) [user] must_ex(pfcEnqueue(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)))
^  Exit: (253) [user] pfcPost2(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (252) [user] pfcPost11(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (250) [locally_each] locally_each:wtl_how(locally_each:trusted_redo_call_cleanup, locally_each:(true==true), user:set_prolog_flag(occurs_check, true), user:catch(pfcPost11(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _5716, (notrace, wdmsg((user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')=>_5716)), trace)), user:set_prolog_flag(occurs_check, true))
^  Exit: (249) [locally_each] locally_each:wtl(user, set_prolog_flag(occurs_check, true), user:catch(pfcPost11(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _5716, (notrace, wdmsg((user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')=>_5716)), trace)), user:each_call_cleanup)
^  Exit: (248) [locally_each] locally_each:locally(user:set_prolog_flag(occurs_check, true), user:catch(pfcPost11(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax)), _5716, (notrace, wdmsg((user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')=>_5716)), trace)))
^  Exit: (247) [user] pfcPost1(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (246) [user] pfcPost_rev((P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax), user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Exit: (245) [user] pfcPost(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Call: (245) [user] pfcRun
^  Unify: (245) [user] pfcRun
^  Call: (246) [user] pfcGetSearch(direct)
^  Unify: (246) [user] pfcGetSearch(direct)
   Call: (247) [t_l] t_l:pfcSearchTL(_175786)
   Fail: (247) [t_l] t_l:pfcSearchTL(_175786)
^  Redo: (246) [user] pfcGetSearch(direct)
^  Call: (247) [user] pfcSearch(_178560)
^  Unify: (247) [user] pfcSearch(direct)
^  Exit: (247) [user] pfcSearch(direct)
   Call: (247) [system] direct=direct
   Exit: (247) [system] direct=direct
^  Exit: (246) [user] pfcGetSearch(direct)
^  Unify: (245) [user] pfcRun
^  Exit: (245) [user] pfcRun
^  Exit: (244) [user] pfcAdd(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), (P;HTML|mfl4(_5692, user, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta' : 1805, 1805), ax))
^  Exit: (243) [user] pfcAdd(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Exit: (242) [user] pfcAdd_Now(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Exit: (241) [system] once(user:pfcAdd_Now(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))
^  Exit: (240) [user] must_det_ll(user:pfcAdd_Now(user:loaded_into_kb('&corelib', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))
^  Call: (240) [user] must_det_ll(include_metta_directory_file('&corelib', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (240) [user] must_det_ll(user:include_metta_directory_file('&corelib', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (241) [user] once(user:include_metta_directory_file('&corelib', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (241) [system] once(user:include_metta_directory_file('&corelib', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (242) [user] include_metta_directory_file('&corelib', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Unify: (242) [user] include_metta_directory_file('&corelib', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (243) [user] include_metta_directory_file_prebuilt('&corelib', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Unify: (243) [user] include_metta_directory_file_prebuilt('&corelib', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (244) [user] symbol_concat(_255450, '.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Unify: (244) [user] symbol_concat(_260280, '.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (245) [system] atom_concat(_265036, '.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (245) [system] atom_concat('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal', '.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Exit: (244) [user] symbol_concat('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal', '.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (244) [user] symbol_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.qlf', _279528)
^  Unify: (244) [user] symbol_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.qlf', _279528)
   Call: (245) [system] atom_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.qlf', _279528)
   Exit: (245) [system] atom_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.qlf', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.qlf')
^  Exit: (244) [user] symbol_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.qlf', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.qlf')
   Call: (244) [system] exists_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.qlf')
^  Redo: (243) [user] include_metta_directory_file_prebuilt('&corelib', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Unify: (243) [user] include_metta_directory_file_prebuilt('&corelib', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (244) [user] just_load_datalog
^  Unify: (244) [user] just_load_datalog
^  Exit: (244) [user] just_load_datalog
^  Call: (244) [user] symbol_concat(_317086, '.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Unify: (244) [user] symbol_concat(_321916, '.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (245) [system] atom_concat(_326672, '.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (245) [system] atom_concat('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal', '.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Exit: (244) [user] symbol_concat('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal', '.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (244) [user] symbol_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.datalog', _341164)
^  Unify: (244) [user] symbol_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.datalog', _341164)
   Call: (245) [system] atom_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.datalog', _341164)
   Exit: (245) [system] atom_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.datalog', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.datalog')
^  Exit: (244) [user] symbol_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.datalog', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.datalog')
   Call: (244) [system] exists_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.datalog')
^  Redo: (243) [user] include_metta_directory_file_prebuilt('&corelib', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Unify: (243) [user] include_metta_directory_file_prebuilt('&corelib', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (244) [user] symbol_concat(_375974, '.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Unify: (244) [user] symbol_concat(_380804, '.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (245) [system] atom_concat(_385560, '.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (245) [system] atom_concat('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal', '.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Exit: (244) [user] symbol_concat('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal', '.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (244) [user] symbol_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.datalog', _400052)
^  Unify: (244) [user] symbol_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.datalog', _400052)
   Call: (245) [system] atom_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.datalog', _400052)
   Exit: (245) [system] atom_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.datalog', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.datalog')
^  Exit: (244) [user] symbol_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.datalog', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.datalog')
   Call: (244) [system] exists_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.datalog')
^  Redo: (242) [user] include_metta_directory_file('&corelib', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Unify: (242) [user] include_metta_directory_file('&corelib', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (243) [user] count_lines_up_to(2000, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _434788)
^  Unify: (243) [user] count_lines_up_to(2000, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _434788)
   Call: (244) [system] open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', read, _444450, [encoding(utf8)])
   Exit: (244) [system] open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', read, (0x55aefe498890), [encoding(utf8)])
^  Call: (244) [user] count_lines_in_stream(2000, (0x55aefe498890), 0, _434788)
^  Unify: (244) [user] count_lines_in_stream(2000, (0x55aefe498890), 0, _434788)
   Call: (245) [system] 0>=2000
^  Redo: (244) [user] count_lines_in_stream(2000, (0x55aefe498890), 0, _434788)
   Call: (245) [read_util] read_util:read_line_to_codes((0x55aefe498890), _457866)
   Exit: (245) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(: ErrorType Type)`)
   Call: (245) [system] `(: ErrorType Type)`==end_of_file
^  Redo: (244) [user] count_lines_in_stream(2000, (0x55aefe498890), 0, _434788)
   Call: (245) [system] _461702 is 0+1
   Exit: (245) [system] 1 is 0+1
^  Call: (245) [user] count_lines_in_stream(2000, (0x55aefe498890), 1, _434788)
^  Unify: (245) [user] count_lines_in_stream(2000, (0x55aefe498890), 1, _434788)
   Call: (246) [system] 1>=2000
^  Redo: (245) [user] count_lines_in_stream(2000, (0x55aefe498890), 1, _434788)
   Call: (246) [read_util] read_util:read_line_to_codes((0x55aefe498890), _467296)
   Exit: (246) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: Error (-> Atom Atom Err ... |)
   Call: (246) [system] |(: Error (-> Atom Atom Err ... |==end_of_file
^  Redo: (245) [user] count_lines_in_stream(2000, (0x55aefe498890), 1, _434788)
   Call: (246) [system] _471228 is 1+1
   Exit: (246) [system] 2 is 1+1
^  Call: (246) [user] count_lines_in_stream(2000, (0x55aefe498890), 2, _434788)
^  Unify: (246) [user] count_lines_in_stream(2000, (0x55aefe498890), 2, _434788)
   Call: (247) [system] 2>=2000
^  Redo: (246) [user] count_lines_in_stream(2000, (0x55aefe498890), 2, _434788)
   Call: (247) [read_util] read_util:read_line_to_codes((0x55aefe498890), _476822)
   Exit: (247) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(: ReturnType Type)`)
   Call: (247) [system] `(: ReturnType Type)`==end_of_file
^  Redo: (246) [user] count_lines_in_stream(2000, (0x55aefe498890), 2, _434788)
   Call: (247) [system] _480664 is 2+1
   Exit: (247) [system] 3 is 2+1
^  Call: (247) [user] count_lines_in_stream(2000, (0x55aefe498890), 3, _434788)
^  Unify: (247) [user] count_lines_in_stream(2000, (0x55aefe498890), 3, _434788)
   Call: (248) [system] 3>=2000
^  Redo: (247) [user] count_lines_in_stream(2000, (0x55aefe498890), 3, _434788)
   Call: (248) [read_util] read_util:read_line_to_codes((0x55aefe498890), _486258)
   Exit: (248) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(: return (-> Atom ReturnType))`)
   Call: (248) [system] `(: return (-> Atom ReturnType))`==end_of_file
^  Redo: (247) [user] count_lines_in_stream(2000, (0x55aefe498890), 3, _434788)
   Call: (248) [system] _490172 is 3+1
   Exit: (248) [system] 4 is 3+1
^  Call: (248) [user] count_lines_in_stream(2000, (0x55aefe498890), 4, _434788)
^  Unify: (248) [user] count_lines_in_stream(2000, (0x55aefe498890), 4, _434788)
   Call: (249) [system] 4>=2000
^  Redo: (248) [user] count_lines_in_stream(2000, (0x55aefe498890), 4, _434788)
   Call: (249) [read_util] read_util:read_line_to_codes((0x55aefe498890), _495766)
   Exit: (249) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (249) [system] []==end_of_file
^  Redo: (248) [user] count_lines_in_stream(2000, (0x55aefe498890), 4, _434788)
   Call: (249) [system] _499494 is 4+1
   Exit: (249) [system] 5 is 4+1
^  Call: (249) [user] count_lines_in_stream(2000, (0x55aefe498890), 5, _434788)
^  Unify: (249) [user] count_lines_in_stream(2000, (0x55aefe498890), 5, _434788)
   Call: (250) [system] 5>=2000
^  Redo: (249) [user] count_lines_in_stream(2000, (0x55aefe498890), 5, _434788)
   Call: (250) [read_util] read_util:read_line_to_codes((0x55aefe498890), _505088)
   Exit: (250) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(: function (-> Atom Atom))`)
   Call: (250) [system] `(: function (-> Atom Atom))`==end_of_file
^  Redo: (249) [user] count_lines_in_stream(2000, (0x55aefe498890), 5, _434788)
   Call: (250) [system] _508978 is 5+1
   Exit: (250) [system] 6 is 5+1
^  Call: (250) [user] count_lines_in_stream(2000, (0x55aefe498890), 6, _434788)
^  Unify: (250) [user] count_lines_in_stream(2000, (0x55aefe498890), 6, _434788)
   Call: (251) [system] 6>=2000
^  Redo: (250) [user] count_lines_in_stream(2000, (0x55aefe498890), 6, _434788)
   Call: (251) [read_util] read_util:read_line_to_codes((0x55aefe498890), _514572)
   Exit: (251) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(: eval (-> Atom Atom))`)
   Call: (251) [system] `(: eval (-> Atom Atom))`==end_of_file
^  Redo: (250) [user] count_lines_in_stream(2000, (0x55aefe498890), 6, _434788)
   Call: (251) [system] _518438 is 6+1
   Exit: (251) [system] 7 is 6+1
^  Call: (251) [user] count_lines_in_stream(2000, (0x55aefe498890), 7, _434788)
^  Unify: (251) [user] count_lines_in_stream(2000, (0x55aefe498890), 7, _434788)
   Call: (252) [system] 7>=2000
^  Redo: (251) [user] count_lines_in_stream(2000, (0x55aefe498890), 7, _434788)
   Call: (252) [read_util] read_util:read_line_to_codes((0x55aefe498890), _6626)
   Exit: (252) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: chain (-> Atom Variable ... |)
   Call: (252) [system] |(: chain (-> Atom Variable ... |==end_of_file
^  Redo: (251) [user] count_lines_in_stream(2000, (0x55aefe498890), 7, _5680)
   Call: (252) [system] _10534 is 7+1
   Exit: (252) [system] 8 is 7+1
^  Call: (252) [user] count_lines_in_stream(2000, (0x55aefe498890), 8, _5680)
^  Unify: (252) [user] count_lines_in_stream(2000, (0x55aefe498890), 8, _5680)
   Call: (253) [system] 8>=2000
^  Redo: (252) [user] count_lines_in_stream(2000, (0x55aefe498890), 8, _5680)
   Call: (253) [read_util] read_util:read_line_to_codes((0x55aefe498890), _16128)
   Exit: (253) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: unify (-> Atom Atom Ato ... |)
   Call: (253) [system] |(: unify (-> Atom Atom Ato ... |==end_of_file
^  Redo: (252) [user] count_lines_in_stream(2000, (0x55aefe498890), 8, _5680)
   Call: (253) [system] _20090 is 8+1
   Exit: (253) [system] 9 is 8+1
^  Call: (253) [user] count_lines_in_stream(2000, (0x55aefe498890), 9, _5680)
^  Unify: (253) [user] count_lines_in_stream(2000, (0x55aefe498890), 9, _5680)
   Call: (254) [system] 9>=2000
^  Redo: (253) [user] count_lines_in_stream(2000, (0x55aefe498890), 9, _5680)
   Call: (254) [read_util] read_util:read_line_to_codes((0x55aefe498890), _25684)
   Exit: (254) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(: cons (-> Atom Atom Atom))`)
   Call: (254) [system] `(: cons (-> Atom Atom Atom))`==end_of_file
^  Redo: (253) [user] count_lines_in_stream(2000, (0x55aefe498890), 9, _5680)
   Call: (254) [system] _29580 is 9+1
   Exit: (254) [system] 10 is 9+1
^  Call: (254) [user] count_lines_in_stream(2000, (0x55aefe498890), 10, _5680)
^  Unify: (254) [user] count_lines_in_stream(2000, (0x55aefe498890), 10, _5680)
   Call: (255) [system] 10>=2000
^  Redo: (254) [user] count_lines_in_stream(2000, (0x55aefe498890), 10, _5680)
   Call: (255) [read_util] read_util:read_line_to_codes((0x55aefe498890), _35174)
   Exit: (255) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(: decons (-> Atom Atom))`)
   Call: (255) [system] `(: decons (-> Atom Atom))`==end_of_file
^  Redo: (254) [user] count_lines_in_stream(2000, (0x55aefe498890), 10, _5680)
   Call: (255) [system] _39052 is 10+1
   Exit: (255) [system] 11 is 10+1
^  Call: (255) [user] count_lines_in_stream(2000, (0x55aefe498890), 11, _5680)
^  Unify: (255) [user] count_lines_in_stream(2000, (0x55aefe498890), 11, _5680)
   Call: (256) [system] 11>=2000
^  Redo: (255) [user] count_lines_in_stream(2000, (0x55aefe498890), 11, _5680)
   Call: (256) [read_util] read_util:read_line_to_codes((0x55aefe498890), _44646)
   Exit: (256) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: collapse-bind (-> Atom  ... |)
   Call: (256) [system] |(: collapse-bind (-> Atom  ... |==end_of_file
^  Redo: (255) [user] count_lines_in_stream(2000, (0x55aefe498890), 11, _5680)
   Call: (256) [system] _48566 is 11+1
   Exit: (256) [system] 12 is 11+1
^  Call: (256) [user] count_lines_in_stream(2000, (0x55aefe498890), 12, _5680)
^  Unify: (256) [user] count_lines_in_stream(2000, (0x55aefe498890), 12, _5680)
   Call: (257) [system] 12>=2000
^  Redo: (256) [user] count_lines_in_stream(2000, (0x55aefe498890), 12, _5680)
   Call: (257) [read_util] read_util:read_line_to_codes((0x55aefe498890), _54160)
   Exit: (257) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: superpose-bind (-> Atom ... |)
   Call: (257) [system] |(: superpose-bind (-> Atom ... |==end_of_file
^  Redo: (256) [user] count_lines_in_stream(2000, (0x55aefe498890), 12, _5680)
   Call: (257) [system] _58086 is 12+1
   Exit: (257) [system] 13 is 12+1
^  Call: (257) [user] count_lines_in_stream(2000, (0x55aefe498890), 13, _5680)
^  Unify: (257) [user] count_lines_in_stream(2000, (0x55aefe498890), 13, _5680)
   Call: (258) [system] 13>=2000
^  Redo: (257) [user] count_lines_in_stream(2000, (0x55aefe498890), 13, _5680)
   Call: (258) [read_util] read_util:read_line_to_codes((0x55aefe498890), _63680)
   Exit: (258) [read_util] read_util:read_line_to_codes((0x55aefe498890), |; We specialize them but l ... |)
   Call: (258) [system] |; We specialize them but l ... |==end_of_file
^  Redo: (257) [user] count_lines_in_stream(2000, (0x55aefe498890), 13, _5680)
   Call: (258) [system] _67726 is 13+1
   Exit: (258) [system] 14 is 13+1
^  Call: (258) [user] count_lines_in_stream(2000, (0x55aefe498890), 14, _5680)
^  Unify: (258) [user] count_lines_in_stream(2000, (0x55aefe498890), 14, _5680)
   Call: (259) [system] 14>=2000
^  Redo: (258) [user] count_lines_in_stream(2000, (0x55aefe498890), 14, _5680)
   Call: (259) [read_util] read_util:read_line_to_codes((0x55aefe498890), _73320)
   Exit: (259) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: cons-atom (-> Atom Expr ... |)
   Call: (259) [system] |(: cons-atom (-> Atom Expr ... |==end_of_file
^  Redo: (258) [user] count_lines_in_stream(2000, (0x55aefe498890), 14, _5680)
   Call: (259) [system] _77318 is 14+1
   Exit: (259) [system] 15 is 14+1
^  Call: (259) [user] count_lines_in_stream(2000, (0x55aefe498890), 15, _5680)
^  Unify: (259) [user] count_lines_in_stream(2000, (0x55aefe498890), 15, _5680)
   Call: (260) [system] 15>=2000
^  Redo: (259) [user] count_lines_in_stream(2000, (0x55aefe498890), 15, _5680)
   Call: (260) [read_util] read_util:read_line_to_codes((0x55aefe498890), _82912)
   Exit: (260) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: decons-atom (-> Express ... |)
   Call: (260) [system] |(: decons-atom (-> Express ... |==end_of_file
^  Redo: (259) [user] count_lines_in_stream(2000, (0x55aefe498890), 15, _5680)
   Call: (260) [system] _86892 is 15+1
   Exit: (260) [system] 16 is 15+1
^  Call: (260) [user] count_lines_in_stream(2000, (0x55aefe498890), 16, _5680)
^  Unify: (260) [user] count_lines_in_stream(2000, (0x55aefe498890), 16, _5680)
   Call: (261) [system] 16>=2000
^  Redo: (260) [user] count_lines_in_stream(2000, (0x55aefe498890), 16, _5680)
   Call: (261) [read_util] read_util:read_line_to_codes((0x55aefe498890), _92486)
   Exit: (261) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: collapse-bind (-> Atom  ... |)
   Call: (261) [system] |(: collapse-bind (-> Atom  ... |==end_of_file
^  Redo: (260) [user] count_lines_in_stream(2000, (0x55aefe498890), 16, _5680)
   Call: (261) [system] _96442 is 16+1
   Exit: (261) [system] 17 is 16+1
^  Call: (261) [user] count_lines_in_stream(2000, (0x55aefe498890), 17, _5680)
^  Unify: (261) [user] count_lines_in_stream(2000, (0x55aefe498890), 17, _5680)
   Call: (262) [system] 17>=2000
^  Redo: (261) [user] count_lines_in_stream(2000, (0x55aefe498890), 17, _5680)
   Call: (262) [read_util] read_util:read_line_to_codes((0x55aefe498890), _102036)
   Exit: (262) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: superpose-bind (-> Expr ... |)
   Call: (262) [system] |(: superpose-bind (-> Expr ... |==end_of_file
^  Redo: (261) [user] count_lines_in_stream(2000, (0x55aefe498890), 17, _5680)
   Call: (262) [system] _105998 is 17+1
   Exit: (262) [system] 18 is 17+1
^  Call: (262) [user] count_lines_in_stream(2000, (0x55aefe498890), 18, _5680)
^  Unify: (262) [user] count_lines_in_stream(2000, (0x55aefe498890), 18, _5680)
   Call: (263) [system] 18>=2000
^  Redo: (262) [user] count_lines_in_stream(2000, (0x55aefe498890), 18, _5680)
   Call: (263) [read_util] read_util:read_line_to_codes((0x55aefe498890), _111592)
   Exit: (263) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (263) [system] []==end_of_file
^  Redo: (262) [user] count_lines_in_stream(2000, (0x55aefe498890), 18, _5680)
   Call: (263) [system] _115320 is 18+1
   Exit: (263) [system] 19 is 18+1
^  Call: (263) [user] count_lines_in_stream(2000, (0x55aefe498890), 19, _5680)
^  Unify: (263) [user] count_lines_in_stream(2000, (0x55aefe498890), 19, _5680)
   Call: (264) [system] 19>=2000
^  Redo: (263) [user] count_lines_in_stream(2000, (0x55aefe498890), 19, _5680)
   Call: (264) [read_util] read_util:read_line_to_codes((0x55aefe498890), _120914)
   Exit: (264) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(: id (-> Atom Atom))`)
   Call: (264) [system] `(: id (-> Atom Atom))`==end_of_file
^  Redo: (263) [user] count_lines_in_stream(2000, (0x55aefe498890), 19, _5680)
   Call: (264) [system] _124768 is 19+1
   Exit: (264) [system] 20 is 19+1
^  Call: (264) [user] count_lines_in_stream(2000, (0x55aefe498890), 20, _5680)
^  Unify: (264) [user] count_lines_in_stream(2000, (0x55aefe498890), 20, _5680)
   Call: (265) [system] 20>=2000
^  Redo: (264) [user] count_lines_in_stream(2000, (0x55aefe498890), 20, _5680)
   Call: (265) [read_util] read_util:read_line_to_codes((0x55aefe498890), _130362)
   Exit: (265) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (id $x) $x)`)
   Call: (265) [system] `(= (id $x) $x)`==end_of_file
^  Redo: (264) [user] count_lines_in_stream(2000, (0x55aefe498890), 20, _5680)
   Call: (265) [system] _134174 is 20+1
   Exit: (265) [system] 21 is 20+1
^  Call: (265) [user] count_lines_in_stream(2000, (0x55aefe498890), 21, _5680)
^  Unify: (265) [user] count_lines_in_stream(2000, (0x55aefe498890), 21, _5680)
   Call: (266) [system] 21>=2000
^  Redo: (265) [user] count_lines_in_stream(2000, (0x55aefe498890), 21, _5680)
   Call: (266) [read_util] read_util:read_line_to_codes((0x55aefe498890), _139768)
   Exit: (266) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (266) [system] []==end_of_file
^  Redo: (265) [user] count_lines_in_stream(2000, (0x55aefe498890), 21, _5680)
   Call: (266) [system] _143496 is 21+1
   Exit: (266) [system] 22 is 21+1
^  Call: (266) [user] count_lines_in_stream(2000, (0x55aefe498890), 22, _5680)
^  Unify: (266) [user] count_lines_in_stream(2000, (0x55aefe498890), 22, _5680)
   Call: (267) [system] 22>=2000
^  Redo: (266) [user] count_lines_in_stream(2000, (0x55aefe498890), 22, _5680)
   Call: (267) [read_util] read_util:read_line_to_codes((0x55aefe498890), _149090)
   Exit: (267) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: apply (-> Atom Variable ... |)
   Call: (267) [system] |(: apply (-> Atom Variable ... |==end_of_file
^  Redo: (266) [user] count_lines_in_stream(2000, (0x55aefe498890), 22, _5680)
   Call: (267) [system] _153046 is 22+1
   Exit: (267) [system] 23 is 22+1
^  Call: (267) [user] count_lines_in_stream(2000, (0x55aefe498890), 23, _5680)
^  Unify: (267) [user] count_lines_in_stream(2000, (0x55aefe498890), 23, _5680)
   Call: (268) [system] 23>=2000
^  Redo: (267) [user] count_lines_in_stream(2000, (0x55aefe498890), 23, _5680)
   Call: (268) [read_util] read_util:read_line_to_codes((0x55aefe498890), _158640)
   Exit: (268) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (apply $atom $var $templ)`)
   Call: (268) [system] `(= (apply $atom $var $templ)`==end_of_file
^  Redo: (267) [user] count_lines_in_stream(2000, (0x55aefe498890), 23, _5680)
   Call: (268) [system] _162536 is 23+1
   Exit: (268) [system] 24 is 23+1
^  Call: (268) [user] count_lines_in_stream(2000, (0x55aefe498890), 24, _5680)
^  Unify: (268) [user] count_lines_in_stream(2000, (0x55aefe498890), 24, _5680)
   Call: (269) [system] 24>=2000
^  Redo: (268) [user] count_lines_in_stream(2000, (0x55aefe498890), 24, _5680)
   Call: (269) [read_util] read_util:read_line_to_codes((0x55aefe498890), _168130)
   Exit: (269) [read_util] read_util:read_line_to_codes((0x55aefe498890), |  (function (chain (eval ( ... |)
   Call: (269) [system] |  (function (chain (eval ( ... |==end_of_file
^  Redo: (268) [user] count_lines_in_stream(2000, (0x55aefe498890), 24, _5680)
   Call: (269) [system] _172224 is 24+1
   Exit: (269) [system] 25 is 24+1
^  Call: (269) [user] count_lines_in_stream(2000, (0x55aefe498890), 25, _5680)
^  Unify: (269) [user] count_lines_in_stream(2000, (0x55aefe498890), 25, _5680)
   Call: (270) [system] 25>=2000
^  Redo: (269) [user] count_lines_in_stream(2000, (0x55aefe498890), 25, _5680)
   Call: (270) [read_util] read_util:read_line_to_codes((0x55aefe498890), _177818)
   Exit: (270) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (270) [system] []==end_of_file
^  Redo: (269) [user] count_lines_in_stream(2000, (0x55aefe498890), 25, _5680)
   Call: (270) [system] _181546 is 25+1
   Exit: (270) [system] 26 is 25+1
^  Call: (270) [user] count_lines_in_stream(2000, (0x55aefe498890), 26, _5680)
^  Unify: (270) [user] count_lines_in_stream(2000, (0x55aefe498890), 26, _5680)
   Call: (271) [system] 26>=2000
^  Redo: (270) [user] count_lines_in_stream(2000, (0x55aefe498890), 26, _5680)
   Call: (271) [read_util] read_util:read_line_to_codes((0x55aefe498890), _187140)
   Exit: (271) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: if-decons-expr (-> Expr ... |)
   Call: (271) [system] |(: if-decons-expr (-> Expr ... |==end_of_file
^  Redo: (270) [user] count_lines_in_stream(2000, (0x55aefe498890), 26, _5680)
   Call: (271) [system] _191270 is 26+1
   Exit: (271) [system] 27 is 26+1
^  Call: (271) [user] count_lines_in_stream(2000, (0x55aefe498890), 27, _5680)
^  Unify: (271) [user] count_lines_in_stream(2000, (0x55aefe498890), 27, _5680)
   Call: (272) [system] 27>=2000
^  Redo: (271) [user] count_lines_in_stream(2000, (0x55aefe498890), 27, _5680)
   Call: (272) [read_util] read_util:read_line_to_codes((0x55aefe498890), _196864)
   Exit: (272) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(= (if-decons-expr $atom $ ... |)
   Call: (272) [system] |(= (if-decons-expr $atom $ ... |==end_of_file
^  Redo: (271) [user] count_lines_in_stream(2000, (0x55aefe498890), 27, _5680)
   Call: (272) [system] _200886 is 27+1
   Exit: (272) [system] 28 is 27+1
^  Call: (272) [user] count_lines_in_stream(2000, (0x55aefe498890), 28, _5680)
^  Unify: (272) [user] count_lines_in_stream(2000, (0x55aefe498890), 28, _5680)
   Call: (273) [system] 28>=2000
^  Redo: (272) [user] count_lines_in_stream(2000, (0x55aefe498890), 28, _5680)
   Call: (273) [read_util] read_util:read_line_to_codes((0x55aefe498890), _206480)
   Exit: (273) [read_util] read_util:read_line_to_codes((0x55aefe498890), |  (function (eval (if-equa ... |)
   Call: (273) [system] |  (function (eval (if-equa ... |==end_of_file
^  Redo: (272) [user] count_lines_in_stream(2000, (0x55aefe498890), 28, _5680)
   Call: (273) [system] _210424 is 28+1
   Exit: (273) [system] 29 is 28+1
^  Call: (273) [user] count_lines_in_stream(2000, (0x55aefe498890), 29, _5680)
^  Unify: (273) [user] count_lines_in_stream(2000, (0x55aefe498890), 29, _5680)
   Call: (274) [system] 29>=2000
^  Redo: (273) [user] count_lines_in_stream(2000, (0x55aefe498890), 29, _5680)
   Call: (274) [read_util] read_util:read_line_to_codes((0x55aefe498890), _216018)
   Exit: (274) [read_util] read_util:read_line_to_codes((0x55aefe498890), `    (return $else)`)
   Call: (274) [system] `    (return $else)`==end_of_file
^  Redo: (273) [user] count_lines_in_stream(2000, (0x55aefe498890), 29, _5680)
   Call: (274) [system] _219854 is 29+1
   Exit: (274) [system] 30 is 29+1
^  Call: (274) [user] count_lines_in_stream(2000, (0x55aefe498890), 30, _5680)
^  Unify: (274) [user] count_lines_in_stream(2000, (0x55aefe498890), 30, _5680)
   Call: (275) [system] 30>=2000
^  Redo: (274) [user] count_lines_in_stream(2000, (0x55aefe498890), 30, _5680)
   Call: (275) [read_util] read_util:read_line_to_codes((0x55aefe498890), _225448)
   Exit: (275) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (chain (decons-atom $a ... |)
   Call: (275) [system] |    (chain (decons-atom $a ... |==end_of_file
^  Redo: (274) [user] count_lines_in_stream(2000, (0x55aefe498890), 30, _5680)
   Call: (275) [system] _229392 is 30+1
   Exit: (275) [system] 31 is 30+1
^  Call: (275) [user] count_lines_in_stream(2000, (0x55aefe498890), 31, _5680)
^  Unify: (275) [user] count_lines_in_stream(2000, (0x55aefe498890), 31, _5680)
   Call: (276) [system] 31>=2000
^  Redo: (275) [user] count_lines_in_stream(2000, (0x55aefe498890), 31, _5680)
   Call: (276) [read_util] read_util:read_line_to_codes((0x55aefe498890), _234986)
   Exit: (276) [read_util] read_util:read_line_to_codes((0x55aefe498890), |      (unify $list ($head  ... |)
   Call: (276) [system] |      (unify $list ($head  ... |==end_of_file
^  Redo: (275) [user] count_lines_in_stream(2000, (0x55aefe498890), 31, _5680)
   Call: (276) [system] _239128 is 31+1
   Exit: (276) [system] 32 is 31+1
^  Call: (276) [user] count_lines_in_stream(2000, (0x55aefe498890), 32, _5680)
^  Unify: (276) [user] count_lines_in_stream(2000, (0x55aefe498890), 32, _5680)
   Call: (277) [system] 32>=2000
^  Redo: (276) [user] count_lines_in_stream(2000, (0x55aefe498890), 32, _5680)
   Call: (277) [read_util] read_util:read_line_to_codes((0x55aefe498890), _244722)
   Exit: (277) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (277) [system] []==end_of_file
^  Redo: (276) [user] count_lines_in_stream(2000, (0x55aefe498890), 32, _5680)
   Call: (277) [system] _248450 is 32+1
   Exit: (277) [system] 33 is 32+1
^  Call: (277) [user] count_lines_in_stream(2000, (0x55aefe498890), 33, _5680)
^  Unify: (277) [user] count_lines_in_stream(2000, (0x55aefe498890), 33, _5680)
   Call: (278) [system] 33>=2000
^  Redo: (277) [user] count_lines_in_stream(2000, (0x55aefe498890), 33, _5680)
   Call: (278) [read_util] read_util:read_line_to_codes((0x55aefe498890), _254044)
   Exit: (278) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: if-error (-> Atom Atom  ... |)
   Call: (278) [system] |(: if-error (-> Atom Atom  ... |==end_of_file
^  Redo: (277) [user] count_lines_in_stream(2000, (0x55aefe498890), 33, _5680)
   Call: (278) [system] _257994 is 33+1
   Exit: (278) [system] 34 is 33+1
^  Call: (278) [user] count_lines_in_stream(2000, (0x55aefe498890), 34, _5680)
^  Unify: (278) [user] count_lines_in_stream(2000, (0x55aefe498890), 34, _5680)
   Call: (279) [system] 34>=2000
^  Redo: (278) [user] count_lines_in_stream(2000, (0x55aefe498890), 34, _5680)
   Call: (279) [read_util] read_util:read_line_to_codes((0x55aefe498890), _263588)
   Exit: (279) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (if-error $atom $then $else)`)
   Call: (279) [system] `(= (if-error $atom $then $else)`==end_of_file
^  Redo: (278) [user] count_lines_in_stream(2000, (0x55aefe498890), 34, _5680)
   Call: (279) [system] _267502 is 34+1
   Exit: (279) [system] 35 is 34+1
^  Call: (279) [user] count_lines_in_stream(2000, (0x55aefe498890), 35, _5680)
^  Unify: (279) [user] count_lines_in_stream(2000, (0x55aefe498890), 35, _5680)
   Call: (280) [system] 35>=2000
^  Redo: (279) [user] count_lines_in_stream(2000, (0x55aefe498890), 35, _5680)
   Call: (280) [read_util] read_util:read_line_to_codes((0x55aefe498890), _273096)
   Exit: (280) [read_util] read_util:read_line_to_codes((0x55aefe498890), |  (function (chain (eval ( ... |)
   Call: (280) [system] |  (function (chain (eval ( ... |==end_of_file
^  Redo: (279) [user] count_lines_in_stream(2000, (0x55aefe498890), 35, _5680)
   Call: (280) [system] _277136 is 35+1
   Exit: (280) [system] 36 is 35+1
^  Call: (280) [user] count_lines_in_stream(2000, (0x55aefe498890), 36, _5680)
^  Unify: (280) [user] count_lines_in_stream(2000, (0x55aefe498890), 36, _5680)
   Call: (281) [system] 36>=2000
^  Redo: (280) [user] count_lines_in_stream(2000, (0x55aefe498890), 36, _5680)
   Call: (281) [read_util] read_util:read_line_to_codes((0x55aefe498890), _282730)
   Exit: (281) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (eval (if-equal $meta  ... |)
   Call: (281) [system] |    (eval (if-equal $meta  ... |==end_of_file
^  Redo: (280) [user] count_lines_in_stream(2000, (0x55aefe498890), 36, _5680)
   Call: (281) [system] _286674 is 36+1
   Exit: (281) [system] 37 is 36+1
^  Call: (281) [user] count_lines_in_stream(2000, (0x55aefe498890), 37, _5680)
^  Unify: (281) [user] count_lines_in_stream(2000, (0x55aefe498890), 37, _5680)
   Call: (282) [system] 37>=2000
^  Redo: (281) [user] count_lines_in_stream(2000, (0x55aefe498890), 37, _5680)
   Call: (282) [read_util] read_util:read_line_to_codes((0x55aefe498890), _292268)
   Exit: (282) [read_util] read_util:read_line_to_codes((0x55aefe498890), `      (eval (if-equal $atom ()`)
   Call: (282) [system] `      (eval (if-equal $atom ()`==end_of_file
^  Redo: (281) [user] count_lines_in_stream(2000, (0x55aefe498890), 37, _5680)
   Call: (282) [system] _296176 is 37+1
   Exit: (282) [system] 38 is 37+1
^  Call: (282) [user] count_lines_in_stream(2000, (0x55aefe498890), 38, _5680)
^  Unify: (282) [user] count_lines_in_stream(2000, (0x55aefe498890), 38, _5680)
   Call: (283) [system] 38>=2000
^  Redo: (282) [user] count_lines_in_stream(2000, (0x55aefe498890), 38, _5680)
   Call: (283) [read_util] read_util:read_line_to_codes((0x55aefe498890), _301770)
   Exit: (283) [read_util] read_util:read_line_to_codes((0x55aefe498890), `        (return $else)`)
   Call: (283) [system] `        (return $else)`==end_of_file
^  Redo: (282) [user] count_lines_in_stream(2000, (0x55aefe498890), 38, _5680)
   Call: (283) [system] _305630 is 38+1
   Exit: (283) [system] 39 is 38+1
^  Call: (283) [user] count_lines_in_stream(2000, (0x55aefe498890), 39, _5680)
^  Unify: (283) [user] count_lines_in_stream(2000, (0x55aefe498890), 39, _5680)
   Call: (284) [system] 39>=2000
^  Redo: (283) [user] count_lines_in_stream(2000, (0x55aefe498890), 39, _5680)
   Call: (284) [read_util] read_util:read_line_to_codes((0x55aefe498890), _311224)
   Exit: (284) [read_util] read_util:read_line_to_codes((0x55aefe498890), |        (chain (decons-ato ... |)
   Call: (284) [system] |        (chain (decons-ato ... |==end_of_file
^  Redo: (283) [user] count_lines_in_stream(2000, (0x55aefe498890), 39, _5680)
   Call: (284) [system] _315192 is 39+1
   Exit: (284) [system] 40 is 39+1
^  Call: (284) [user] count_lines_in_stream(2000, (0x55aefe498890), 40, _5680)
^  Unify: (284) [user] count_lines_in_stream(2000, (0x55aefe498890), 40, _5680)
   Call: (285) [system] 40>=2000
^  Redo: (284) [user] count_lines_in_stream(2000, (0x55aefe498890), 40, _5680)
   Call: (285) [read_util] read_util:read_line_to_codes((0x55aefe498890), _320786)
   Exit: (285) [read_util] read_util:read_line_to_codes((0x55aefe498890), |          (unify $list ($h ... |)
   Call: (285) [system] |          (unify $list ($h ... |==end_of_file
^  Redo: (284) [user] count_lines_in_stream(2000, (0x55aefe498890), 40, _5680)
   Call: (285) [system] _324730 is 40+1
   Exit: (285) [system] 41 is 40+1
^  Call: (285) [user] count_lines_in_stream(2000, (0x55aefe498890), 41, _5680)
^  Unify: (285) [user] count_lines_in_stream(2000, (0x55aefe498890), 41, _5680)
   Call: (286) [system] 41>=2000
^  Redo: (285) [user] count_lines_in_stream(2000, (0x55aefe498890), 41, _5680)
   Call: (286) [read_util] read_util:read_line_to_codes((0x55aefe498890), _330324)
   Exit: (286) [read_util] read_util:read_line_to_codes((0x55aefe498890), |            (eval (if-equa ... |)
   Call: (286) [system] |            (eval (if-equa ... |==end_of_file
^  Redo: (285) [user] count_lines_in_stream(2000, (0x55aefe498890), 41, _5680)
   Call: (286) [system] _334478 is 41+1
   Exit: (286) [system] 42 is 41+1
^  Call: (286) [user] count_lines_in_stream(2000, (0x55aefe498890), 42, _5680)
^  Unify: (286) [user] count_lines_in_stream(2000, (0x55aefe498890), 42, _5680)
   Call: (287) [system] 42>=2000
^  Redo: (286) [user] count_lines_in_stream(2000, (0x55aefe498890), 42, _5680)
   Call: (287) [read_util] read_util:read_line_to_codes((0x55aefe498890), _340072)
   Exit: (287) [read_util] read_util:read_line_to_codes((0x55aefe498890), `            (return $else) ))))`)
   Call: (287) [system] `            (return $else) ))))`==end_of_file
^  Redo: (286) [user] count_lines_in_stream(2000, (0x55aefe498890), 42, _5680)
   Call: (287) [system] _343986 is 42+1
   Exit: (287) [system] 43 is 42+1
^  Call: (287) [user] count_lines_in_stream(2000, (0x55aefe498890), 43, _5680)
^  Unify: (287) [user] count_lines_in_stream(2000, (0x55aefe498890), 43, _5680)
   Call: (288) [system] 43>=2000
^  Redo: (287) [user] count_lines_in_stream(2000, (0x55aefe498890), 43, _5680)
   Call: (288) [read_util] read_util:read_line_to_codes((0x55aefe498890), _349580)
   Exit: (288) [read_util] read_util:read_line_to_codes((0x55aefe498890), `      (return $else) )))))`)
   Call: (288) [system] `      (return $else) )))))`==end_of_file
^  Redo: (287) [user] count_lines_in_stream(2000, (0x55aefe498890), 43, _5680)
   Call: (288) [system] _353464 is 43+1
   Exit: (288) [system] 44 is 43+1
^  Call: (288) [user] count_lines_in_stream(2000, (0x55aefe498890), 44, _5680)
^  Unify: (288) [user] count_lines_in_stream(2000, (0x55aefe498890), 44, _5680)
   Call: (289) [system] 44>=2000
^  Redo: (288) [user] count_lines_in_stream(2000, (0x55aefe498890), 44, _5680)
   Call: (289) [read_util] read_util:read_line_to_codes((0x55aefe498890), _359058)
   Exit: (289) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (289) [system] []==end_of_file
^  Redo: (288) [user] count_lines_in_stream(2000, (0x55aefe498890), 44, _5680)
   Call: (289) [system] _362786 is 44+1
   Exit: (289) [system] 45 is 44+1
^  Call: (289) [user] count_lines_in_stream(2000, (0x55aefe498890), 45, _5680)
^  Unify: (289) [user] count_lines_in_stream(2000, (0x55aefe498890), 45, _5680)
   Call: (290) [system] 45>=2000
^  Redo: (289) [user] count_lines_in_stream(2000, (0x55aefe498890), 45, _5680)
   Call: (290) [read_util] read_util:read_line_to_codes((0x55aefe498890), _368380)
   Exit: (290) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: return-on-error (-> Ato ... |)
   Call: (290) [system] |(: return-on-error (-> Ato ... |==end_of_file
^  Redo: (289) [user] count_lines_in_stream(2000, (0x55aefe498890), 45, _5680)
   Call: (290) [system] _372342 is 45+1
   Exit: (290) [system] 46 is 45+1
^  Call: (290) [user] count_lines_in_stream(2000, (0x55aefe498890), 46, _5680)
^  Unify: (290) [user] count_lines_in_stream(2000, (0x55aefe498890), 46, _5680)
   Call: (291) [system] 46>=2000
^  Redo: (290) [user] count_lines_in_stream(2000, (0x55aefe498890), 46, _5680)
   Call: (291) [read_util] read_util:read_line_to_codes((0x55aefe498890), _377936)
   Exit: (291) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(= (return-on-error $atom  ... |)
   Call: (291) [system] |(= (return-on-error $atom  ... |==end_of_file
^  Redo: (290) [user] count_lines_in_stream(2000, (0x55aefe498890), 46, _5680)
   Call: (291) [system] _381856 is 46+1
   Exit: (291) [system] 47 is 46+1
^  Call: (291) [user] count_lines_in_stream(2000, (0x55aefe498890), 47, _5680)
^  Unify: (291) [user] count_lines_in_stream(2000, (0x55aefe498890), 47, _5680)
   Call: (292) [system] 47>=2000
^  Redo: (291) [user] count_lines_in_stream(2000, (0x55aefe498890), 47, _5680)
   Call: (292) [read_util] read_util:read_line_to_codes((0x55aefe498890), _387450)
   Exit: (292) [read_util] read_util:read_line_to_codes((0x55aefe498890), |  (function (eval (if-equa ... |)
   Call: (292) [system] |  (function (eval (if-equa ... |==end_of_file
^  Redo: (291) [user] count_lines_in_stream(2000, (0x55aefe498890), 47, _5680)
   Call: (292) [system] _391556 is 47+1
   Exit: (292) [system] 48 is 47+1
^  Call: (292) [user] count_lines_in_stream(2000, (0x55aefe498890), 48, _5680)
^  Unify: (292) [user] count_lines_in_stream(2000, (0x55aefe498890), 48, _5680)
   Call: (293) [system] 48>=2000
^  Redo: (292) [user] count_lines_in_stream(2000, (0x55aefe498890), 48, _5680)
   Call: (293) [read_util] read_util:read_line_to_codes((0x55aefe498890), _397150)
   Exit: (293) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (eval (if-error $atom  ... |)
   Call: (293) [system] |    (eval (if-error $atom  ... |==end_of_file
^  Redo: (292) [user] count_lines_in_stream(2000, (0x55aefe498890), 48, _5680)
   Call: (293) [system] _401172 is 48+1
   Exit: (293) [system] 49 is 48+1
^  Call: (293) [user] count_lines_in_stream(2000, (0x55aefe498890), 49, _5680)
^  Unify: (293) [user] count_lines_in_stream(2000, (0x55aefe498890), 49, _5680)
   Call: (294) [system] 49>=2000
^  Redo: (293) [user] count_lines_in_stream(2000, (0x55aefe498890), 49, _5680)
   Call: (294) [read_util] read_util:read_line_to_codes((0x55aefe498890), _406766)
   Exit: (294) [read_util] read_util:read_line_to_codes((0x55aefe498890), `      (return $then) ))))))`)
   Call: (294) [system] `      (return $then) ))))))`==end_of_file
^  Redo: (293) [user] count_lines_in_stream(2000, (0x55aefe498890), 49, _5680)
   Call: (294) [system] _410656 is 49+1
   Exit: (294) [system] 50 is 49+1
^  Call: (294) [user] count_lines_in_stream(2000, (0x55aefe498890), 50, _5680)
^  Unify: (294) [user] count_lines_in_stream(2000, (0x55aefe498890), 50, _5680)
   Call: (295) [system] 50>=2000
^  Redo: (294) [user] count_lines_in_stream(2000, (0x55aefe498890), 50, _5680)
   Call: (295) [read_util] read_util:read_line_to_codes((0x55aefe498890), _416250)
   Exit: (295) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (295) [system] []==end_of_file
^  Redo: (294) [user] count_lines_in_stream(2000, (0x55aefe498890), 50, _5680)
   Call: (295) [system] _419978 is 50+1
   Exit: (295) [system] 51 is 50+1
^  Call: (295) [user] count_lines_in_stream(2000, (0x55aefe498890), 51, _5680)
^  Unify: (295) [user] count_lines_in_stream(2000, (0x55aefe498890), 51, _5680)
   Call: (296) [system] 51>=2000
^  Redo: (295) [user] count_lines_in_stream(2000, (0x55aefe498890), 51, _5680)
   Call: (296) [read_util] read_util:read_line_to_codes((0x55aefe498890), _425572)
   Exit: (296) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: switch (-> %Undefined%  ... |)
   Call: (296) [system] |(: switch (-> %Undefined%  ... |==end_of_file
^  Redo: (295) [user] count_lines_in_stream(2000, (0x55aefe498890), 51, _5680)
   Call: (296) [system] _429558 is 51+1
   Exit: (296) [system] 52 is 51+1
^  Call: (296) [user] count_lines_in_stream(2000, (0x55aefe498890), 52, _5680)
^  Unify: (296) [user] count_lines_in_stream(2000, (0x55aefe498890), 52, _5680)
   Call: (297) [system] 52>=2000
^  Redo: (296) [user] count_lines_in_stream(2000, (0x55aefe498890), 52, _5680)
   Call: (297) [read_util] read_util:read_line_to_codes((0x55aefe498890), _435152)
   Exit: (297) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (switch $atom $cases)`)
   Call: (297) [system] `(= (switch $atom $cases)`==end_of_file
^  Redo: (296) [user] count_lines_in_stream(2000, (0x55aefe498890), 52, _5680)
   Call: (297) [system] _439024 is 52+1
   Exit: (297) [system] 53 is 52+1
^  Call: (297) [user] count_lines_in_stream(2000, (0x55aefe498890), 53, _5680)
^  Unify: (297) [user] count_lines_in_stream(2000, (0x55aefe498890), 53, _5680)
   Call: (298) [system] 53>=2000
^  Redo: (297) [user] count_lines_in_stream(2000, (0x55aefe498890), 53, _5680)
   Call: (298) [read_util] read_util:read_line_to_codes((0x55aefe498890), _444618)
   Exit: (298) [read_util] read_util:read_line_to_codes((0x55aefe498890), |  (function (chain (decons ... |)
   Call: (298) [system] |  (function (chain (decons ... |==end_of_file
^  Redo: (297) [user] count_lines_in_stream(2000, (0x55aefe498890), 53, _5680)
   Call: (298) [system] _448616 is 53+1
   Exit: (298) [system] 54 is 53+1
^  Call: (298) [user] count_lines_in_stream(2000, (0x55aefe498890), 54, _5680)
^  Unify: (298) [user] count_lines_in_stream(2000, (0x55aefe498890), 54, _5680)
   Call: (299) [system] 54>=2000
^  Redo: (298) [user] count_lines_in_stream(2000, (0x55aefe498890), 54, _5680)
   Call: (299) [read_util] read_util:read_line_to_codes((0x55aefe498890), _454210)
   Exit: (299) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (chain (eval (switch-i ... |)
   Call: (299) [system] |    (chain (eval (switch-i ... |==end_of_file
^  Redo: (298) [user] count_lines_in_stream(2000, (0x55aefe498890), 54, _5680)
   Call: (299) [system] _458250 is 54+1
   Exit: (299) [system] 55 is 54+1
^  Call: (299) [user] count_lines_in_stream(2000, (0x55aefe498890), 55, _5680)
^  Unify: (299) [user] count_lines_in_stream(2000, (0x55aefe498890), 55, _5680)
   Call: (300) [system] 55>=2000
^  Redo: (299) [user] count_lines_in_stream(2000, (0x55aefe498890), 55, _5680)
   Call: (300) [read_util] read_util:read_line_to_codes((0x55aefe498890), _463844)
   Exit: (300) [read_util] read_util:read_line_to_codes((0x55aefe498890), |      (chain (eval (if-equ ... |)
   Call: (300) [system] |      (chain (eval (if-equ ... |==end_of_file
^  Redo: (299) [user] count_lines_in_stream(2000, (0x55aefe498890), 55, _5680)
   Call: (300) [system] _468052 is 55+1
   Exit: (300) [system] 56 is 55+1
^  Call: (300) [user] count_lines_in_stream(2000, (0x55aefe498890), 56, _5680)
^  Unify: (300) [user] count_lines_in_stream(2000, (0x55aefe498890), 56, _5680)
   Call: (301) [system] 56>=2000
^  Redo: (300) [user] count_lines_in_stream(2000, (0x55aefe498890), 56, _5680)
   Call: (301) [read_util] read_util:read_line_to_codes((0x55aefe498890), _473646)
   Exit: (301) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (301) [system] []==end_of_file
^  Redo: (300) [user] count_lines_in_stream(2000, (0x55aefe498890), 56, _5680)
   Call: (301) [system] _477374 is 56+1
   Exit: (301) [system] 57 is 56+1
^  Call: (301) [user] count_lines_in_stream(2000, (0x55aefe498890), 57, _5680)
^  Unify: (301) [user] count_lines_in_stream(2000, (0x55aefe498890), 57, _5680)
   Call: (302) [system] 57>=2000
^  Redo: (301) [user] count_lines_in_stream(2000, (0x55aefe498890), 57, _5680)
   Call: (302) [read_util] read_util:read_line_to_codes((0x55aefe498890), _482968)
   Exit: (302) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(= (switch-internal $atom  ... |)
   Call: (302) [system] |(= (switch-internal $atom  ... |==end_of_file
^  Redo: (301) [user] count_lines_in_stream(2000, (0x55aefe498890), 57, _5680)
   Call: (302) [system] _487026 is 57+1
   Exit: (302) [system] 58 is 57+1
^  Call: (302) [user] count_lines_in_stream(2000, (0x55aefe498890), 58, _5680)
^  Unify: (302) [user] count_lines_in_stream(2000, (0x55aefe498890), 58, _5680)
   Call: (303) [system] 58>=2000
^  Redo: (302) [user] count_lines_in_stream(2000, (0x55aefe498890), 58, _5680)
   Call: (303) [read_util] read_util:read_line_to_codes((0x55aefe498890), _492620)
   Exit: (303) [read_util] read_util:read_line_to_codes((0x55aefe498890), |  (function (unify $atom $ ... |)
   Call: (303) [system] |  (function (unify $atom $ ... |==end_of_file
^  Redo: (302) [user] count_lines_in_stream(2000, (0x55aefe498890), 58, _5680)
   Call: (303) [system] _496546 is 58+1
   Exit: (303) [system] 59 is 58+1
^  Call: (303) [user] count_lines_in_stream(2000, (0x55aefe498890), 59, _5680)
^  Unify: (303) [user] count_lines_in_stream(2000, (0x55aefe498890), 59, _5680)
   Call: (304) [system] 59>=2000
^  Redo: (303) [user] count_lines_in_stream(2000, (0x55aefe498890), 59, _5680)
   Call: (304) [read_util] read_util:read_line_to_codes((0x55aefe498890), _502140)
   Exit: (304) [read_util] read_util:read_line_to_codes((0x55aefe498890), `    (return $template)`)
   Call: (304) [system] `    (return $template)`==end_of_file
^  Redo: (303) [user] count_lines_in_stream(2000, (0x55aefe498890), 59, _5680)
   Call: (304) [system] _506000 is 59+1
   Exit: (304) [system] 60 is 59+1
^  Call: (304) [user] count_lines_in_stream(2000, (0x55aefe498890), 60, _5680)
^  Unify: (304) [user] count_lines_in_stream(2000, (0x55aefe498890), 60, _5680)
   Call: (305) [system] 60>=2000
^  Redo: (304) [user] count_lines_in_stream(2000, (0x55aefe498890), 60, _5680)
   Call: (305) [read_util] read_util:read_line_to_codes((0x55aefe498890), _511594)
   Exit: (305) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (chain (eval (switch $ ... |)
   Call: (305) [system] |    (chain (eval (switch $ ... |==end_of_file
^  Redo: (304) [user] count_lines_in_stream(2000, (0x55aefe498890), 60, _5680)
   Call: (305) [system] _515694 is 60+1
   Exit: (305) [system] 61 is 60+1
^  Call: (305) [user] count_lines_in_stream(2000, (0x55aefe498890), 61, _5680)
^  Unify: (305) [user] count_lines_in_stream(2000, (0x55aefe498890), 61, _5680)
   Call: (306) [system] 61>=2000
^  Redo: (305) [user] count_lines_in_stream(2000, (0x55aefe498890), 61, _5680)
   Call: (306) [read_util] read_util:read_line_to_codes((0x55aefe498890), _521288)
   Exit: (306) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (306) [system] []==end_of_file
^  Redo: (305) [user] count_lines_in_stream(2000, (0x55aefe498890), 61, _5680)
   Call: (306) [system] _19060 is 61+1
   Exit: (306) [system] 62 is 61+1
^  Call: (306) [user] count_lines_in_stream(2000, (0x55aefe498890), 62, _5680)
^  Unify: (306) [user] count_lines_in_stream(2000, (0x55aefe498890), 62, _5680)
   Call: (307) [system] 62>=2000
^  Redo: (306) [user] count_lines_in_stream(2000, (0x55aefe498890), 62, _5680)
   Call: (307) [read_util] read_util:read_line_to_codes((0x55aefe498890), _24654)
   Exit: (307) [read_util] read_util:read_line_to_codes((0x55aefe498890), |;;;;;;;;;;;;;;;;;;;;;;;;;; ... |)
   Call: (307) [system] |;;;;;;;;;;;;;;;;;;;;;;;;;; ... |==end_of_file
^  Redo: (306) [user] count_lines_in_stream(2000, (0x55aefe498890), 62, _5680)
   Call: (307) [system] _28598 is 62+1
   Exit: (307) [system] 63 is 62+1
^  Call: (307) [user] count_lines_in_stream(2000, (0x55aefe498890), 63, _5680)
^  Unify: (307) [user] count_lines_in_stream(2000, (0x55aefe498890), 63, _5680)
   Call: (308) [system] 63>=2000
^  Redo: (307) [user] count_lines_in_stream(2000, (0x55aefe498890), 63, _5680)
   Call: (308) [read_util] read_util:read_line_to_codes((0x55aefe498890), _34192)
   Exit: (308) [read_util] read_util:read_line_to_codes((0x55aefe498890), |; MeTTa interpreter implem ... |)
   Call: (308) [system] |; MeTTa interpreter implem ... |==end_of_file
^  Redo: (307) [user] count_lines_in_stream(2000, (0x55aefe498890), 63, _5680)
   Call: (308) [system] _38136 is 63+1
   Exit: (308) [system] 64 is 63+1
^  Call: (308) [user] count_lines_in_stream(2000, (0x55aefe498890), 64, _5680)
^  Unify: (308) [user] count_lines_in_stream(2000, (0x55aefe498890), 64, _5680)
   Call: (309) [system] 64>=2000
^  Redo: (308) [user] count_lines_in_stream(2000, (0x55aefe498890), 64, _5680)
   Call: (309) [read_util] read_util:read_line_to_codes((0x55aefe498890), _43730)
   Exit: (309) [read_util] read_util:read_line_to_codes((0x55aefe498890), |;;;;;;;;;;;;;;;;;;;;;;;;;; ... |)
   Call: (309) [system] |;;;;;;;;;;;;;;;;;;;;;;;;;; ... |==end_of_file
^  Redo: (308) [user] count_lines_in_stream(2000, (0x55aefe498890), 64, _5680)
   Call: (309) [system] _47674 is 64+1
   Exit: (309) [system] 65 is 64+1
^  Call: (309) [user] count_lines_in_stream(2000, (0x55aefe498890), 65, _5680)
^  Unify: (309) [user] count_lines_in_stream(2000, (0x55aefe498890), 65, _5680)
   Call: (310) [system] 65>=2000
^  Redo: (309) [user] count_lines_in_stream(2000, (0x55aefe498890), 65, _5680)
   Call: (310) [read_util] read_util:read_line_to_codes((0x55aefe498890), _53268)
   Exit: (310) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (310) [system] []==end_of_file
^  Redo: (309) [user] count_lines_in_stream(2000, (0x55aefe498890), 65, _5680)
   Call: (310) [system] _56996 is 65+1
   Exit: (310) [system] 66 is 65+1
^  Call: (310) [user] count_lines_in_stream(2000, (0x55aefe498890), 66, _5680)
^  Unify: (310) [user] count_lines_in_stream(2000, (0x55aefe498890), 66, _5680)
   Call: (311) [system] 66>=2000
^  Redo: (310) [user] count_lines_in_stream(2000, (0x55aefe498890), 66, _5680)
   Call: (311) [read_util] read_util:read_line_to_codes((0x55aefe498890), _62590)
   Exit: (311) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(= (match-types $type1 $ty ... |)
   Call: (311) [system] |(= (match-types $type1 $ty ... |==end_of_file
^  Redo: (310) [user] count_lines_in_stream(2000, (0x55aefe498890), 66, _5680)
   Call: (311) [system] _66570 is 66+1
   Exit: (311) [system] 67 is 66+1
^  Call: (311) [user] count_lines_in_stream(2000, (0x55aefe498890), 67, _5680)
^  Unify: (311) [user] count_lines_in_stream(2000, (0x55aefe498890), 67, _5680)
   Call: (312) [system] 67>=2000
^  Redo: (311) [user] count_lines_in_stream(2000, (0x55aefe498890), 67, _5680)
   Call: (312) [read_util] read_util:read_line_to_codes((0x55aefe498890), _72164)
   Exit: (312) [read_util] read_util:read_line_to_codes((0x55aefe498890), |  (function (eval (if-equa ... |)
   Call: (312) [system] |  (function (eval (if-equa ... |==end_of_file
^  Redo: (311) [user] count_lines_in_stream(2000, (0x55aefe498890), 67, _5680)
   Call: (312) [system] _76168 is 67+1
   Exit: (312) [system] 68 is 67+1
^  Call: (312) [user] count_lines_in_stream(2000, (0x55aefe498890), 68, _5680)
^  Unify: (312) [user] count_lines_in_stream(2000, (0x55aefe498890), 68, _5680)
   Call: (313) [system] 68>=2000
^  Redo: (312) [user] count_lines_in_stream(2000, (0x55aefe498890), 68, _5680)
   Call: (313) [read_util] read_util:read_line_to_codes((0x55aefe498890), _81762)
   Exit: (313) [read_util] read_util:read_line_to_codes((0x55aefe498890), `    (return $then)`)
   Call: (313) [system] `    (return $then)`==end_of_file
^  Redo: (312) [user] count_lines_in_stream(2000, (0x55aefe498890), 68, _5680)
   Call: (313) [system] _85598 is 68+1
   Exit: (313) [system] 69 is 68+1
^  Call: (313) [user] count_lines_in_stream(2000, (0x55aefe498890), 69, _5680)
^  Unify: (313) [user] count_lines_in_stream(2000, (0x55aefe498890), 69, _5680)
   Call: (314) [system] 69>=2000
^  Redo: (313) [user] count_lines_in_stream(2000, (0x55aefe498890), 69, _5680)
   Call: (314) [read_util] read_util:read_line_to_codes((0x55aefe498890), _91192)
   Exit: (314) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (eval (if-equal $type2 ... |)
   Call: (314) [system] |    (eval (if-equal $type2 ... |==end_of_file
^  Redo: (313) [user] count_lines_in_stream(2000, (0x55aefe498890), 69, _5680)
   Call: (314) [system] _95148 is 69+1
   Exit: (314) [system] 70 is 69+1
^  Call: (314) [user] count_lines_in_stream(2000, (0x55aefe498890), 70, _5680)
^  Unify: (314) [user] count_lines_in_stream(2000, (0x55aefe498890), 70, _5680)
   Call: (315) [system] 70>=2000
^  Redo: (314) [user] count_lines_in_stream(2000, (0x55aefe498890), 70, _5680)
   Call: (315) [read_util] read_util:read_line_to_codes((0x55aefe498890), _100742)
   Exit: (315) [read_util] read_util:read_line_to_codes((0x55aefe498890), `      (return $then)`)
   Call: (315) [system] `      (return $then)`==end_of_file
^  Redo: (314) [user] count_lines_in_stream(2000, (0x55aefe498890), 70, _5680)
   Call: (315) [system] _104590 is 70+1
   Exit: (315) [system] 71 is 70+1
^  Call: (315) [user] count_lines_in_stream(2000, (0x55aefe498890), 71, _5680)
^  Unify: (315) [user] count_lines_in_stream(2000, (0x55aefe498890), 71, _5680)
   Call: (316) [system] 71>=2000
^  Redo: (315) [user] count_lines_in_stream(2000, (0x55aefe498890), 71, _5680)
   Call: (316) [read_util] read_util:read_line_to_codes((0x55aefe498890), _110184)
   Exit: (316) [read_util] read_util:read_line_to_codes((0x55aefe498890), |      (eval (if-equal $typ ... |)
   Call: (316) [system] |      (eval (if-equal $typ ... |==end_of_file
^  Redo: (315) [user] count_lines_in_stream(2000, (0x55aefe498890), 71, _5680)
   Call: (316) [system] _114110 is 71+1
   Exit: (316) [system] 72 is 71+1
^  Call: (316) [user] count_lines_in_stream(2000, (0x55aefe498890), 72, _5680)
^  Unify: (316) [user] count_lines_in_stream(2000, (0x55aefe498890), 72, _5680)
   Call: (317) [system] 72>=2000
^  Redo: (316) [user] count_lines_in_stream(2000, (0x55aefe498890), 72, _5680)
   Call: (317) [read_util] read_util:read_line_to_codes((0x55aefe498890), _119704)
   Exit: (317) [read_util] read_util:read_line_to_codes((0x55aefe498890), `        (return $then)`)
   Call: (317) [system] `        (return $then)`==end_of_file
^  Redo: (316) [user] count_lines_in_stream(2000, (0x55aefe498890), 72, _5680)
   Call: (317) [system] _123564 is 72+1
   Exit: (317) [system] 73 is 72+1
^  Call: (317) [user] count_lines_in_stream(2000, (0x55aefe498890), 73, _5680)
^  Unify: (317) [user] count_lines_in_stream(2000, (0x55aefe498890), 73, _5680)
   Call: (318) [system] 73>=2000
^  Redo: (317) [user] count_lines_in_stream(2000, (0x55aefe498890), 73, _5680)
   Call: (318) [read_util] read_util:read_line_to_codes((0x55aefe498890), _129158)
   Exit: (318) [read_util] read_util:read_line_to_codes((0x55aefe498890), |        (eval (if-equal $t ... |)
   Call: (318) [system] |        (eval (if-equal $t ... |==end_of_file
^  Redo: (317) [user] count_lines_in_stream(2000, (0x55aefe498890), 73, _5680)
   Call: (318) [system] _133096 is 73+1
   Exit: (318) [system] 74 is 73+1
^  Call: (318) [user] count_lines_in_stream(2000, (0x55aefe498890), 74, _5680)
^  Unify: (318) [user] count_lines_in_stream(2000, (0x55aefe498890), 74, _5680)
   Call: (319) [system] 74>=2000
^  Redo: (318) [user] count_lines_in_stream(2000, (0x55aefe498890), 74, _5680)
   Call: (319) [read_util] read_util:read_line_to_codes((0x55aefe498890), _138690)
   Exit: (319) [read_util] read_util:read_line_to_codes((0x55aefe498890), `          (return $then)`)
   Call: (319) [system] `          (return $then)`==end_of_file
^  Redo: (318) [user] count_lines_in_stream(2000, (0x55aefe498890), 74, _5680)
   Call: (319) [system] _142562 is 74+1
   Exit: (319) [system] 75 is 74+1
^  Call: (319) [user] count_lines_in_stream(2000, (0x55aefe498890), 75, _5680)
^  Unify: (319) [user] count_lines_in_stream(2000, (0x55aefe498890), 75, _5680)
   Call: (320) [system] 75>=2000
^  Redo: (319) [user] count_lines_in_stream(2000, (0x55aefe498890), 75, _5680)
   Call: (320) [read_util] read_util:read_line_to_codes((0x55aefe498890), _148156)
   Exit: (320) [read_util] read_util:read_line_to_codes((0x55aefe498890), |          (unify $type1 $t ... |)
   Call: (320) [system] |          (unify $type1 $t ... |==end_of_file
^  Redo: (319) [user] count_lines_in_stream(2000, (0x55aefe498890), 75, _5680)
   Call: (320) [system] _152316 is 75+1
   Exit: (320) [system] 76 is 75+1
^  Call: (320) [user] count_lines_in_stream(2000, (0x55aefe498890), 76, _5680)
^  Unify: (320) [user] count_lines_in_stream(2000, (0x55aefe498890), 76, _5680)
   Call: (321) [system] 76>=2000
^  Redo: (320) [user] count_lines_in_stream(2000, (0x55aefe498890), 76, _5680)
   Call: (321) [read_util] read_util:read_line_to_codes((0x55aefe498890), _157910)
   Exit: (321) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (321) [system] []==end_of_file
^  Redo: (320) [user] count_lines_in_stream(2000, (0x55aefe498890), 76, _5680)
   Call: (321) [system] _161638 is 76+1
   Exit: (321) [system] 77 is 76+1
^  Call: (321) [user] count_lines_in_stream(2000, (0x55aefe498890), 77, _5680)
^  Unify: (321) [user] count_lines_in_stream(2000, (0x55aefe498890), 77, _5680)
   Call: (322) [system] 77>=2000
^  Redo: (321) [user] count_lines_in_stream(2000, (0x55aefe498890), 77, _5680)
   Call: (322) [read_util] read_util:read_line_to_codes((0x55aefe498890), _167232)
   Exit: (322) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (first-from-pair $pair)`)
   Call: (322) [system] `(= (first-from-pair $pair)`==end_of_file
^  Redo: (321) [user] count_lines_in_stream(2000, (0x55aefe498890), 77, _5680)
   Call: (322) [system] _171116 is 77+1
   Exit: (322) [system] 78 is 77+1
^  Call: (322) [user] count_lines_in_stream(2000, (0x55aefe498890), 78, _5680)
^  Unify: (322) [user] count_lines_in_stream(2000, (0x55aefe498890), 78, _5680)
   Call: (323) [system] 78>=2000
^  Redo: (322) [user] count_lines_in_stream(2000, (0x55aefe498890), 78, _5680)
   Call: (323) [read_util] read_util:read_line_to_codes((0x55aefe498890), _176710)
   Exit: (323) [read_util] read_util:read_line_to_codes((0x55aefe498890), `  (function`)
   Call: (323) [system] `  (function`==end_of_file
^  Redo: (322) [user] count_lines_in_stream(2000, (0x55aefe498890), 78, _5680)
   Call: (323) [system] _180504 is 78+1
   Exit: (323) [system] 79 is 78+1
^  Call: (323) [user] count_lines_in_stream(2000, (0x55aefe498890), 79, _5680)
^  Unify: (323) [user] count_lines_in_stream(2000, (0x55aefe498890), 79, _5680)
   Call: (324) [system] 79>=2000
^  Redo: (323) [user] count_lines_in_stream(2000, (0x55aefe498890), 79, _5680)
   Call: (324) [read_util] read_util:read_line_to_codes((0x55aefe498890), _186098)
   Exit: (324) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (unify $pair ($first $ ... |)
   Call: (324) [system] |    (unify $pair ($first $ ... |==end_of_file
^  Redo: (323) [user] count_lines_in_stream(2000, (0x55aefe498890), 79, _5680)
   Call: (324) [system] _190024 is 79+1
   Exit: (324) [system] 80 is 79+1
^  Call: (324) [user] count_lines_in_stream(2000, (0x55aefe498890), 80, _5680)
^  Unify: (324) [user] count_lines_in_stream(2000, (0x55aefe498890), 80, _5680)
   Call: (325) [system] 80>=2000
^  Redo: (324) [user] count_lines_in_stream(2000, (0x55aefe498890), 80, _5680)
   Call: (325) [read_util] read_util:read_line_to_codes((0x55aefe498890), _195618)
   Exit: (325) [read_util] read_util:read_line_to_codes((0x55aefe498890), `      (return $first)`)
   Call: (325) [system] `      (return $first)`==end_of_file
^  Redo: (324) [user] count_lines_in_stream(2000, (0x55aefe498890), 80, _5680)
   Call: (325) [system] _199472 is 80+1
   Exit: (325) [system] 81 is 80+1
^  Call: (325) [user] count_lines_in_stream(2000, (0x55aefe498890), 81, _5680)
^  Unify: (325) [user] count_lines_in_stream(2000, (0x55aefe498890), 81, _5680)
   Call: (326) [system] 81>=2000
^  Redo: (325) [user] count_lines_in_stream(2000, (0x55aefe498890), 81, _5680)
   Call: (326) [read_util] read_util:read_line_to_codes((0x55aefe498890), _205066)
   Exit: (326) [read_util] read_util:read_line_to_codes((0x55aefe498890), |      (return (Error (firs ... |)
   Call: (326) [system] |      (return (Error (firs ... |==end_of_file
^  Redo: (325) [user] count_lines_in_stream(2000, (0x55aefe498890), 81, _5680)
   Call: (326) [system] _209232 is 81+1
   Exit: (326) [system] 82 is 81+1
^  Call: (326) [user] count_lines_in_stream(2000, (0x55aefe498890), 82, _5680)
^  Unify: (326) [user] count_lines_in_stream(2000, (0x55aefe498890), 82, _5680)
   Call: (327) [system] 82>=2000
^  Redo: (326) [user] count_lines_in_stream(2000, (0x55aefe498890), 82, _5680)
   Call: (327) [read_util] read_util:read_line_to_codes((0x55aefe498890), _214826)
   Exit: (327) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (327) [system] []==end_of_file
^  Redo: (326) [user] count_lines_in_stream(2000, (0x55aefe498890), 82, _5680)
   Call: (327) [system] _218554 is 82+1
   Exit: (327) [system] 83 is 82+1
^  Call: (327) [user] count_lines_in_stream(2000, (0x55aefe498890), 83, _5680)
^  Unify: (327) [user] count_lines_in_stream(2000, (0x55aefe498890), 83, _5680)
   Call: (328) [system] 83>=2000
^  Redo: (327) [user] count_lines_in_stream(2000, (0x55aefe498890), 83, _5680)
   Call: (328) [read_util] read_util:read_line_to_codes((0x55aefe498890), _224148)
   Exit: (328) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(= (match-type-or $folded  ... |)
   Call: (328) [system] |(= (match-type-or $folded  ... |==end_of_file
^  Redo: (327) [user] count_lines_in_stream(2000, (0x55aefe498890), 83, _5680)
   Call: (328) [system] _228104 is 83+1
   Exit: (328) [system] 84 is 83+1
^  Call: (328) [user] count_lines_in_stream(2000, (0x55aefe498890), 84, _5680)
^  Unify: (328) [user] count_lines_in_stream(2000, (0x55aefe498890), 84, _5680)
   Call: (329) [system] 84>=2000
^  Redo: (328) [user] count_lines_in_stream(2000, (0x55aefe498890), 84, _5680)
   Call: (329) [read_util] read_util:read_line_to_codes((0x55aefe498890), _233698)
   Exit: (329) [read_util] read_util:read_line_to_codes((0x55aefe498890), `  (function`)
   Call: (329) [system] `  (function`==end_of_file
^  Redo: (328) [user] count_lines_in_stream(2000, (0x55aefe498890), 84, _5680)
   Call: (329) [system] _237492 is 84+1
   Exit: (329) [system] 85 is 84+1
^  Call: (329) [user] count_lines_in_stream(2000, (0x55aefe498890), 85, _5680)
^  Unify: (329) [user] count_lines_in_stream(2000, (0x55aefe498890), 85, _5680)
   Call: (330) [system] 85>=2000
^  Redo: (329) [user] count_lines_in_stream(2000, (0x55aefe498890), 85, _5680)
   Call: (330) [read_util] read_util:read_line_to_codes((0x55aefe498890), _243086)
   Exit: (330) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (chain (eval (match-ty ... |)
   Call: (330) [system] |    (chain (eval (match-ty ... |==end_of_file
^  Redo: (329) [user] count_lines_in_stream(2000, (0x55aefe498890), 85, _5680)
   Call: (330) [system] _247192 is 85+1
   Exit: (330) [system] 86 is 85+1
^  Call: (330) [user] count_lines_in_stream(2000, (0x55aefe498890), 86, _5680)
^  Unify: (330) [user] count_lines_in_stream(2000, (0x55aefe498890), 86, _5680)
   Call: (331) [system] 86>=2000
^  Redo: (330) [user] count_lines_in_stream(2000, (0x55aefe498890), 86, _5680)
   Call: (331) [read_util] read_util:read_line_to_codes((0x55aefe498890), _252786)
   Exit: (331) [read_util] read_util:read_line_to_codes((0x55aefe498890), |      (chain (eval (or $fo ... |)
   Call: (331) [system] |      (chain (eval (or $fo ... |==end_of_file
^  Redo: (330) [user] count_lines_in_stream(2000, (0x55aefe498890), 86, _5680)
   Call: (331) [system] _256892 is 86+1
   Exit: (331) [system] 87 is 86+1
^  Call: (331) [user] count_lines_in_stream(2000, (0x55aefe498890), 87, _5680)
^  Unify: (331) [user] count_lines_in_stream(2000, (0x55aefe498890), 87, _5680)
   Call: (332) [system] 87>=2000
^  Redo: (331) [user] count_lines_in_stream(2000, (0x55aefe498890), 87, _5680)
   Call: (332) [read_util] read_util:read_line_to_codes((0x55aefe498890), _262486)
   Exit: (332) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (332) [system] []==end_of_file
^  Redo: (331) [user] count_lines_in_stream(2000, (0x55aefe498890), 87, _5680)
   Call: (332) [system] _266214 is 87+1
   Exit: (332) [system] 88 is 87+1
^  Call: (332) [user] count_lines_in_stream(2000, (0x55aefe498890), 88, _5680)
^  Unify: (332) [user] count_lines_in_stream(2000, (0x55aefe498890), 88, _5680)
   Call: (333) [system] 88>=2000
^  Redo: (332) [user] count_lines_in_stream(2000, (0x55aefe498890), 88, _5680)
   Call: (333) [read_util] read_util:read_line_to_codes((0x55aefe498890), _271808)
   Exit: (333) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(= (type-cast $atom $type  ... |)
   Call: (333) [system] |(= (type-cast $atom $type  ... |==end_of_file
^  Redo: (332) [user] count_lines_in_stream(2000, (0x55aefe498890), 88, _5680)
   Call: (333) [system] _275734 is 88+1
   Exit: (333) [system] 89 is 88+1
^  Call: (333) [user] count_lines_in_stream(2000, (0x55aefe498890), 89, _5680)
^  Unify: (333) [user] count_lines_in_stream(2000, (0x55aefe498890), 89, _5680)
   Call: (334) [system] 89>=2000
^  Redo: (333) [user] count_lines_in_stream(2000, (0x55aefe498890), 89, _5680)
   Call: (334) [read_util] read_util:read_line_to_codes((0x55aefe498890), _281328)
   Exit: (334) [read_util] read_util:read_line_to_codes((0x55aefe498890), |  (function (chain (eval ( ... |)
   Call: (334) [system] |  (function (chain (eval ( ... |==end_of_file
^  Redo: (333) [user] count_lines_in_stream(2000, (0x55aefe498890), 89, _5680)
   Call: (334) [system] _285368 is 89+1
   Exit: (334) [system] 90 is 89+1
^  Call: (334) [user] count_lines_in_stream(2000, (0x55aefe498890), 90, _5680)
^  Unify: (334) [user] count_lines_in_stream(2000, (0x55aefe498890), 90, _5680)
   Call: (335) [system] 90>=2000
^  Redo: (334) [user] count_lines_in_stream(2000, (0x55aefe498890), 90, _5680)
   Call: (335) [read_util] read_util:read_line_to_codes((0x55aefe498890), _290962)
   Exit: (335) [read_util] read_util:read_line_to_codes((0x55aefe498890), `    (eval (if-equal $type $meta`)
   Call: (335) [system] `    (eval (if-equal $type $meta`==end_of_file
^  Redo: (334) [user] count_lines_in_stream(2000, (0x55aefe498890), 90, _5680)
   Call: (335) [system] _294876 is 90+1
   Exit: (335) [system] 91 is 90+1
^  Call: (335) [user] count_lines_in_stream(2000, (0x55aefe498890), 91, _5680)
^  Unify: (335) [user] count_lines_in_stream(2000, (0x55aefe498890), 91, _5680)
   Call: (336) [system] 91>=2000
^  Redo: (335) [user] count_lines_in_stream(2000, (0x55aefe498890), 91, _5680)
   Call: (336) [read_util] read_util:read_line_to_codes((0x55aefe498890), _300470)
   Exit: (336) [read_util] read_util:read_line_to_codes((0x55aefe498890), `      (return $atom)`)
   Call: (336) [system] `      (return $atom)`==end_of_file
^  Redo: (335) [user] count_lines_in_stream(2000, (0x55aefe498890), 91, _5680)
   Call: (336) [system] _304318 is 91+1
   Exit: (336) [system] 92 is 91+1
^  Call: (336) [user] count_lines_in_stream(2000, (0x55aefe498890), 92, _5680)
^  Unify: (336) [user] count_lines_in_stream(2000, (0x55aefe498890), 92, _5680)
   Call: (337) [system] 92>=2000
^  Redo: (336) [user] count_lines_in_stream(2000, (0x55aefe498890), 92, _5680)
   Call: (337) [read_util] read_util:read_line_to_codes((0x55aefe498890), _309912)
   Exit: (337) [read_util] read_util:read_line_to_codes((0x55aefe498890), |      (chain (eval (collap ... |)
   Call: (337) [system] |      (chain (eval (collap ... |==end_of_file
^  Redo: (336) [user] count_lines_in_stream(2000, (0x55aefe498890), 92, _5680)
   Call: (337) [system] _314102 is 92+1
   Exit: (337) [system] 93 is 92+1
^  Call: (337) [user] count_lines_in_stream(2000, (0x55aefe498890), 93, _5680)
^  Unify: (337) [user] count_lines_in_stream(2000, (0x55aefe498890), 93, _5680)
   Call: (338) [system] 93>=2000
^  Redo: (337) [user] count_lines_in_stream(2000, (0x55aefe498890), 93, _5680)
   Call: (338) [read_util] read_util:read_line_to_codes((0x55aefe498890), _319696)
   Exit: (338) [read_util] read_util:read_line_to_codes((0x55aefe498890), |        (chain (eval (map- ... |)
   Call: (338) [system] |        (chain (eval (map- ... |==end_of_file
^  Redo: (337) [user] count_lines_in_stream(2000, (0x55aefe498890), 93, _5680)
   Call: (338) [system] _323988 is 93+1
   Exit: (338) [system] 94 is 93+1
^  Call: (338) [user] count_lines_in_stream(2000, (0x55aefe498890), 94, _5680)
^  Unify: (338) [user] count_lines_in_stream(2000, (0x55aefe498890), 94, _5680)
   Call: (339) [system] 94>=2000
^  Redo: (338) [user] count_lines_in_stream(2000, (0x55aefe498890), 94, _5680)
   Call: (339) [read_util] read_util:read_line_to_codes((0x55aefe498890), _329582)
   Exit: (339) [read_util] read_util:read_line_to_codes((0x55aefe498890), |            (chain (eval ( ... |)
   Call: (339) [system] |            (chain (eval ( ... |==end_of_file
^  Redo: (338) [user] count_lines_in_stream(2000, (0x55aefe498890), 94, _5680)
   Call: (339) [system] _333988 is 94+1
   Exit: (339) [system] 95 is 94+1
^  Call: (339) [user] count_lines_in_stream(2000, (0x55aefe498890), 95, _5680)
^  Unify: (339) [user] count_lines_in_stream(2000, (0x55aefe498890), 95, _5680)
   Call: (340) [system] 95>=2000
^  Redo: (339) [user] count_lines_in_stream(2000, (0x55aefe498890), 95, _5680)
   Call: (340) [read_util] read_util:read_line_to_codes((0x55aefe498890), _339582)
   Exit: (340) [read_util] read_util:read_line_to_codes((0x55aefe498890), |              (eval (if $i ... |)
   Call: (340) [system] |              (eval (if $i ... |==end_of_file
^  Redo: (339) [user] count_lines_in_stream(2000, (0x55aefe498890), 95, _5680)
   Call: (340) [system] _343532 is 95+1
   Exit: (340) [system] 96 is 95+1
^  Call: (340) [user] count_lines_in_stream(2000, (0x55aefe498890), 96, _5680)
^  Unify: (340) [user] count_lines_in_stream(2000, (0x55aefe498890), 96, _5680)
   Call: (341) [system] 96>=2000
^  Redo: (340) [user] count_lines_in_stream(2000, (0x55aefe498890), 96, _5680)
   Call: (341) [read_util] read_util:read_line_to_codes((0x55aefe498890), _349126)
   Exit: (341) [read_util] read_util:read_line_to_codes((0x55aefe498890), `                (return $atom)`)
   Call: (341) [system] `                (return $atom)`==end_of_file
^  Redo: (340) [user] count_lines_in_stream(2000, (0x55aefe498890), 96, _5680)
   Call: (341) [system] _353034 is 96+1
   Exit: (341) [system] 97 is 96+1
^  Call: (341) [user] count_lines_in_stream(2000, (0x55aefe498890), 97, _5680)
^  Unify: (341) [user] count_lines_in_stream(2000, (0x55aefe498890), 97, _5680)
   Call: (342) [system] 97>=2000
^  Redo: (341) [user] count_lines_in_stream(2000, (0x55aefe498890), 97, _5680)
   Call: (342) [read_util] read_util:read_line_to_codes((0x55aefe498890), _358628)
   Exit: (342) [read_util] read_util:read_line_to_codes((0x55aefe498890), |                (return (E ... |)
   Call: (342) [system] |                (return (E ... |==end_of_file
^  Redo: (341) [user] count_lines_in_stream(2000, (0x55aefe498890), 97, _5680)
   Call: (342) [system] _362698 is 97+1
   Exit: (342) [system] 98 is 97+1
^  Call: (342) [user] count_lines_in_stream(2000, (0x55aefe498890), 98, _5680)
^  Unify: (342) [user] count_lines_in_stream(2000, (0x55aefe498890), 98, _5680)
   Call: (343) [system] 98>=2000
^  Redo: (342) [user] count_lines_in_stream(2000, (0x55aefe498890), 98, _5680)
   Call: (343) [read_util] read_util:read_line_to_codes((0x55aefe498890), _368292)
   Exit: (343) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (343) [system] []==end_of_file
^  Redo: (342) [user] count_lines_in_stream(2000, (0x55aefe498890), 98, _5680)
   Call: (343) [system] _372020 is 98+1
   Exit: (343) [system] 99 is 98+1
^  Call: (343) [user] count_lines_in_stream(2000, (0x55aefe498890), 99, _5680)
^  Unify: (343) [user] count_lines_in_stream(2000, (0x55aefe498890), 99, _5680)
   Call: (344) [system] 99>=2000
^  Redo: (343) [user] count_lines_in_stream(2000, (0x55aefe498890), 99, _5680)
   Call: (344) [read_util] read_util:read_line_to_codes((0x55aefe498890), _377614)
   Exit: (344) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (is-function $type)`)
   Call: (344) [system] `(= (is-function $type)`==end_of_file
^  Redo: (343) [user] count_lines_in_stream(2000, (0x55aefe498890), 99, _5680)
   Call: (344) [system] _381474 is 99+1
   Exit: (344) [system] 100 is 99+1
^  Call: (344) [user] count_lines_in_stream(2000, (0x55aefe498890), 100, _5680)
^  Unify: (344) [user] count_lines_in_stream(2000, (0x55aefe498890), 100, _5680)
   Call: (345) [system] 100>=2000
^  Redo: (344) [user] count_lines_in_stream(2000, (0x55aefe498890), 100, _5680)
   Call: (345) [read_util] read_util:read_line_to_codes((0x55aefe498890), _387068)
   Exit: (345) [read_util] read_util:read_line_to_codes((0x55aefe498890), |  (function (chain (eval ( ... |)
   Call: (345) [system] |  (function (chain (eval ( ... |==end_of_file
^  Redo: (344) [user] count_lines_in_stream(2000, (0x55aefe498890), 100, _5680)
   Call: (345) [system] _391108 is 100+1
   Exit: (345) [system] 101 is 100+1
^  Call: (345) [user] count_lines_in_stream(2000, (0x55aefe498890), 101, _5680)
^  Unify: (345) [user] count_lines_in_stream(2000, (0x55aefe498890), 101, _5680)
   Call: (346) [system] 101>=2000
^  Redo: (345) [user] count_lines_in_stream(2000, (0x55aefe498890), 101, _5680)
   Call: (346) [read_util] read_util:read_line_to_codes((0x55aefe498890), _396702)
   Exit: (346) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (eval (switch ($type $ ... |)
   Call: (346) [system] |    (eval (switch ($type $ ... |==end_of_file
^  Redo: (345) [user] count_lines_in_stream(2000, (0x55aefe498890), 101, _5680)
   Call: (346) [system] _400628 is 101+1
   Exit: (346) [system] 102 is 101+1
^  Call: (346) [user] count_lines_in_stream(2000, (0x55aefe498890), 102, _5680)
^  Unify: (346) [user] count_lines_in_stream(2000, (0x55aefe498890), 102, _5680)
   Call: (347) [system] 102>=2000
^  Redo: (346) [user] count_lines_in_stream(2000, (0x55aefe498890), 102, _5680)
   Call: (347) [read_util] read_util:read_line_to_codes((0x55aefe498890), _406222)
   Exit: (347) [read_util] read_util:read_line_to_codes((0x55aefe498890), `      (($type Expression)`)
   Call: (347) [system] `      (($type Expression)`==end_of_file
^  Redo: (346) [user] count_lines_in_stream(2000, (0x55aefe498890), 102, _5680)
   Call: (347) [system] _410100 is 102+1
   Exit: (347) [system] 103 is 102+1
^  Call: (347) [user] count_lines_in_stream(2000, (0x55aefe498890), 103, _5680)
^  Unify: (347) [user] count_lines_in_stream(2000, (0x55aefe498890), 103, _5680)
   Call: (348) [system] 103>=2000
^  Redo: (347) [user] count_lines_in_stream(2000, (0x55aefe498890), 103, _5680)
   Call: (348) [read_util] read_util:read_line_to_codes((0x55aefe498890), _415694)
   Exit: (348) [read_util] read_util:read_line_to_codes((0x55aefe498890), |        (eval (if-decons-e ... |)
   Call: (348) [system] |        (eval (if-decons-e ... |==end_of_file
^  Redo: (347) [user] count_lines_in_stream(2000, (0x55aefe498890), 103, _5680)
   Call: (348) [system] _419710 is 103+1
   Exit: (348) [system] 104 is 103+1
^  Call: (348) [user] count_lines_in_stream(2000, (0x55aefe498890), 104, _5680)
^  Unify: (348) [user] count_lines_in_stream(2000, (0x55aefe498890), 104, _5680)
   Call: (349) [system] 104>=2000
^  Redo: (348) [user] count_lines_in_stream(2000, (0x55aefe498890), 104, _5680)
   Call: (349) [read_util] read_util:read_line_to_codes((0x55aefe498890), _425304)
   Exit: (349) [read_util] read_util:read_line_to_codes((0x55aefe498890), |          (unify $head ->  ... |)
   Call: (349) [system] |          (unify $head ->  ... |==end_of_file
^  Redo: (348) [user] count_lines_in_stream(2000, (0x55aefe498890), 104, _5680)
   Call: (349) [system] _429362 is 104+1
   Exit: (349) [system] 105 is 104+1
^  Call: (349) [user] count_lines_in_stream(2000, (0x55aefe498890), 105, _5680)
^  Unify: (349) [user] count_lines_in_stream(2000, (0x55aefe498890), 105, _5680)
   Call: (350) [system] 105>=2000
^  Redo: (349) [user] count_lines_in_stream(2000, (0x55aefe498890), 105, _5680)
   Call: (350) [read_util] read_util:read_line_to_codes((0x55aefe498890), _434956)
   Exit: (350) [read_util] read_util:read_line_to_codes((0x55aefe498890), |          (return (Error ( ... |)
   Call: (350) [system] |          (return (Error ( ... |==end_of_file
^  Redo: (349) [user] count_lines_in_stream(2000, (0x55aefe498890), 105, _5680)
   Call: (350) [system] _439284 is 105+1
   Exit: (350) [system] 106 is 105+1
^  Call: (350) [user] count_lines_in_stream(2000, (0x55aefe498890), 106, _5680)
^  Unify: (350) [user] count_lines_in_stream(2000, (0x55aefe498890), 106, _5680)
   Call: (351) [system] 106>=2000
^  Redo: (350) [user] count_lines_in_stream(2000, (0x55aefe498890), 106, _5680)
   Call: (351) [read_util] read_util:read_line_to_codes((0x55aefe498890), _444878)
   Exit: (351) [read_util] read_util:read_line_to_codes((0x55aefe498890), |      (($type $meta) (retu ... |)
   Call: (351) [system] |      (($type $meta) (retu ... |==end_of_file
^  Redo: (350) [user] count_lines_in_stream(2000, (0x55aefe498890), 106, _5680)
   Call: (351) [system] _448822 is 106+1
   Exit: (351) [system] 107 is 106+1
^  Call: (351) [user] count_lines_in_stream(2000, (0x55aefe498890), 107, _5680)
^  Unify: (351) [user] count_lines_in_stream(2000, (0x55aefe498890), 107, _5680)
   Call: (352) [system] 107>=2000
^  Redo: (351) [user] count_lines_in_stream(2000, (0x55aefe498890), 107, _5680)
   Call: (352) [read_util] read_util:read_line_to_codes((0x55aefe498890), _454416)
   Exit: (352) [read_util] read_util:read_line_to_codes((0x55aefe498890), `    ))))))`)
   Call: (352) [system] `    ))))))`==end_of_file
^  Redo: (351) [user] count_lines_in_stream(2000, (0x55aefe498890), 107, _5680)
   Call: (352) [system] _458204 is 107+1
   Exit: (352) [system] 108 is 107+1
^  Call: (352) [user] count_lines_in_stream(2000, (0x55aefe498890), 108, _5680)
^  Unify: (352) [user] count_lines_in_stream(2000, (0x55aefe498890), 108, _5680)
   Call: (353) [system] 108>=2000
^  Redo: (352) [user] count_lines_in_stream(2000, (0x55aefe498890), 108, _5680)
   Call: (353) [read_util] read_util:read_line_to_codes((0x55aefe498890), _463798)
   Exit: (353) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (353) [system] []==end_of_file
^  Redo: (352) [user] count_lines_in_stream(2000, (0x55aefe498890), 108, _5680)
   Call: (353) [system] _467526 is 108+1
   Exit: (353) [system] 109 is 108+1
^  Call: (353) [user] count_lines_in_stream(2000, (0x55aefe498890), 109, _5680)
^  Unify: (353) [user] count_lines_in_stream(2000, (0x55aefe498890), 109, _5680)
   Call: (354) [system] 109>=2000
^  Redo: (353) [user] count_lines_in_stream(2000, (0x55aefe498890), 109, _5680)
   Call: (354) [read_util] read_util:read_line_to_codes((0x55aefe498890), _473120)
   Exit: (354) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: filter-atom (-> Express ... |)
   Call: (354) [system] |(: filter-atom (-> Express ... |==end_of_file
^  Redo: (353) [user] count_lines_in_stream(2000, (0x55aefe498890), 109, _5680)
   Call: (354) [system] _477184 is 109+1
   Exit: (354) [system] 110 is 109+1
^  Call: (354) [user] count_lines_in_stream(2000, (0x55aefe498890), 110, _5680)
^  Unify: (354) [user] count_lines_in_stream(2000, (0x55aefe498890), 110, _5680)
   Call: (355) [system] 110>=2000
^  Redo: (354) [user] count_lines_in_stream(2000, (0x55aefe498890), 110, _5680)
   Call: (355) [read_util] read_util:read_line_to_codes((0x55aefe498890), _482778)
   Exit: (355) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(= (filter-atom $list $var ... |)
   Call: (355) [system] |(= (filter-atom $list $var ... |==end_of_file
^  Redo: (354) [user] count_lines_in_stream(2000, (0x55aefe498890), 110, _5680)
   Call: (355) [system] _486716 is 110+1
   Exit: (355) [system] 111 is 110+1
^  Call: (355) [user] count_lines_in_stream(2000, (0x55aefe498890), 111, _5680)
^  Unify: (355) [user] count_lines_in_stream(2000, (0x55aefe498890), 111, _5680)
   Call: (356) [system] 111>=2000
^  Redo: (355) [user] count_lines_in_stream(2000, (0x55aefe498890), 111, _5680)
   Call: (356) [read_util] read_util:read_line_to_codes((0x55aefe498890), _492310)
   Exit: (356) [read_util] read_util:read_line_to_codes((0x55aefe498890), |  (function (eval (if-deco ... |)
   Call: (356) [system] |  (function (eval (if-deco ... |==end_of_file
^  Redo: (355) [user] count_lines_in_stream(2000, (0x55aefe498890), 111, _5680)
   Call: (356) [system] _496344 is 111+1
   Exit: (356) [system] 112 is 111+1
^  Call: (356) [user] count_lines_in_stream(2000, (0x55aefe498890), 112, _5680)
^  Unify: (356) [user] count_lines_in_stream(2000, (0x55aefe498890), 112, _5680)
   Call: (357) [system] 112>=2000
^  Redo: (356) [user] count_lines_in_stream(2000, (0x55aefe498890), 112, _5680)
   Call: (357) [read_util] read_util:read_line_to_codes((0x55aefe498890), _501938)
   Exit: (357) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (chain (eval (filter-a ... |)
   Call: (357) [system] |    (chain (eval (filter-a ... |==end_of_file
^  Redo: (356) [user] count_lines_in_stream(2000, (0x55aefe498890), 112, _5680)
   Call: (357) [system] _506056 is 112+1
   Exit: (357) [system] 113 is 112+1
^  Call: (357) [user] count_lines_in_stream(2000, (0x55aefe498890), 113, _5680)
^  Unify: (357) [user] count_lines_in_stream(2000, (0x55aefe498890), 113, _5680)
   Call: (358) [system] 113>=2000
^  Redo: (357) [user] count_lines_in_stream(2000, (0x55aefe498890), 113, _5680)
   Call: (358) [read_util] read_util:read_line_to_codes((0x55aefe498890), _511650)
   Exit: (358) [read_util] read_util:read_line_to_codes((0x55aefe498890), |      (chain (eval (apply  ... |)
   Call: (358) [system] |      (chain (eval (apply  ... |==end_of_file
^  Redo: (357) [user] count_lines_in_stream(2000, (0x55aefe498890), 113, _5680)
   Call: (358) [system] _515732 is 113+1
   Exit: (358) [system] 114 is 113+1
^  Call: (358) [user] count_lines_in_stream(2000, (0x55aefe498890), 114, _5680)
^  Unify: (358) [user] count_lines_in_stream(2000, (0x55aefe498890), 114, _5680)
   Call: (359) [system] 114>=2000
^  Redo: (358) [user] count_lines_in_stream(2000, (0x55aefe498890), 114, _5680)
   Call: (359) [read_util] read_util:read_line_to_codes((0x55aefe498890), _521326)
   Exit: (359) [read_util] read_util:read_line_to_codes((0x55aefe498890), |        (chain $filter-exp ... |)
   Call: (359) [system] |        (chain $filter-exp ... |==end_of_file
^  Redo: (358) [user] count_lines_in_stream(2000, (0x55aefe498890), 114, _5680)
   Call: (359) [system] _31914 is 114+1
   Exit: (359) [system] 115 is 114+1
^  Call: (359) [user] count_lines_in_stream(2000, (0x55aefe498890), 115, _5680)
^  Unify: (359) [user] count_lines_in_stream(2000, (0x55aefe498890), 115, _5680)
   Call: (360) [system] 115>=2000
^  Redo: (359) [user] count_lines_in_stream(2000, (0x55aefe498890), 115, _5680)
   Call: (360) [read_util] read_util:read_line_to_codes((0x55aefe498890), _37508)
   Exit: (360) [read_util] read_util:read_line_to_codes((0x55aefe498890), |          (eval (if $is-fi ... |)
   Call: (360) [system] |          (eval (if $is-fi ... |==end_of_file
^  Redo: (359) [user] count_lines_in_stream(2000, (0x55aefe498890), 115, _5680)
   Call: (360) [system] _41428 is 115+1
   Exit: (360) [system] 116 is 115+1
^  Call: (360) [user] count_lines_in_stream(2000, (0x55aefe498890), 116, _5680)
^  Unify: (360) [user] count_lines_in_stream(2000, (0x55aefe498890), 116, _5680)
   Call: (361) [system] 116>=2000
^  Redo: (360) [user] count_lines_in_stream(2000, (0x55aefe498890), 116, _5680)
   Call: (361) [read_util] read_util:read_line_to_codes((0x55aefe498890), _47022)
   Exit: (361) [read_util] read_util:read_line_to_codes((0x55aefe498890), |            (chain (cons-a ... |)
   Call: (361) [system] |            (chain (cons-a ... |==end_of_file
^  Redo: (360) [user] count_lines_in_stream(2000, (0x55aefe498890), 116, _5680)
   Call: (361) [system] _51176 is 116+1
   Exit: (361) [system] 117 is 116+1
^  Call: (361) [user] count_lines_in_stream(2000, (0x55aefe498890), 117, _5680)
^  Unify: (361) [user] count_lines_in_stream(2000, (0x55aefe498890), 117, _5680)
   Call: (362) [system] 117>=2000
^  Redo: (361) [user] count_lines_in_stream(2000, (0x55aefe498890), 117, _5680)
   Call: (362) [read_util] read_util:read_line_to_codes((0x55aefe498890), _56770)
   Exit: (362) [read_util] read_util:read_line_to_codes((0x55aefe498890), |            (return $tail- ... |)
   Call: (362) [system] |            (return $tail- ... |==end_of_file
^  Redo: (361) [user] count_lines_in_stream(2000, (0x55aefe498890), 117, _5680)
   Call: (362) [system] _60744 is 117+1
   Exit: (362) [system] 118 is 117+1
^  Call: (362) [user] count_lines_in_stream(2000, (0x55aefe498890), 118, _5680)
^  Unify: (362) [user] count_lines_in_stream(2000, (0x55aefe498890), 118, _5680)
   Call: (363) [system] 118>=2000
^  Redo: (362) [user] count_lines_in_stream(2000, (0x55aefe498890), 118, _5680)
   Call: (363) [read_util] read_util:read_line_to_codes((0x55aefe498890), _66338)
   Exit: (363) [read_util] read_util:read_line_to_codes((0x55aefe498890), `    (return ()) ))))`)
   Call: (363) [system] `    (return ()) ))))`==end_of_file
^  Redo: (362) [user] count_lines_in_stream(2000, (0x55aefe498890), 118, _5680)
   Call: (363) [system] _70186 is 118+1
   Exit: (363) [system] 119 is 118+1
^  Call: (363) [user] count_lines_in_stream(2000, (0x55aefe498890), 119, _5680)
^  Unify: (363) [user] count_lines_in_stream(2000, (0x55aefe498890), 119, _5680)
   Call: (364) [system] 119>=2000
^  Redo: (363) [user] count_lines_in_stream(2000, (0x55aefe498890), 119, _5680)
   Call: (364) [read_util] read_util:read_line_to_codes((0x55aefe498890), _75780)
   Exit: (364) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (364) [system] []==end_of_file
^  Redo: (363) [user] count_lines_in_stream(2000, (0x55aefe498890), 119, _5680)
   Call: (364) [system] _79508 is 119+1
   Exit: (364) [system] 120 is 119+1
^  Call: (364) [user] count_lines_in_stream(2000, (0x55aefe498890), 120, _5680)
^  Unify: (364) [user] count_lines_in_stream(2000, (0x55aefe498890), 120, _5680)
   Call: (365) [system] 120>=2000
^  Redo: (364) [user] count_lines_in_stream(2000, (0x55aefe498890), 120, _5680)
   Call: (365) [read_util] read_util:read_line_to_codes((0x55aefe498890), _85102)
   Exit: (365) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: map-atom (-> Expression ... |)
   Call: (365) [system] |(: map-atom (-> Expression ... |==end_of_file
^  Redo: (364) [user] count_lines_in_stream(2000, (0x55aefe498890), 120, _5680)
   Call: (365) [system] _89148 is 120+1
   Exit: (365) [system] 121 is 120+1
^  Call: (365) [user] count_lines_in_stream(2000, (0x55aefe498890), 121, _5680)
^  Unify: (365) [user] count_lines_in_stream(2000, (0x55aefe498890), 121, _5680)
   Call: (366) [system] 121>=2000
^  Redo: (365) [user] count_lines_in_stream(2000, (0x55aefe498890), 121, _5680)
   Call: (366) [read_util] read_util:read_line_to_codes((0x55aefe498890), _94742)
   Exit: (366) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (map-atom $list $var $map)`)
   Call: (366) [system] `(= (map-atom $list $var $map)`==end_of_file
^  Redo: (365) [user] count_lines_in_stream(2000, (0x55aefe498890), 121, _5680)
   Call: (366) [system] _98644 is 121+1
   Exit: (366) [system] 122 is 121+1
^  Call: (366) [user] count_lines_in_stream(2000, (0x55aefe498890), 122, _5680)
^  Unify: (366) [user] count_lines_in_stream(2000, (0x55aefe498890), 122, _5680)
   Call: (367) [system] 122>=2000
^  Redo: (366) [user] count_lines_in_stream(2000, (0x55aefe498890), 122, _5680)
   Call: (367) [read_util] read_util:read_line_to_codes((0x55aefe498890), _104238)
   Exit: (367) [read_util] read_util:read_line_to_codes((0x55aefe498890), |  (function (eval (if-deco ... |)
   Call: (367) [system] |  (function (eval (if-deco ... |==end_of_file
^  Redo: (366) [user] count_lines_in_stream(2000, (0x55aefe498890), 122, _5680)
   Call: (367) [system] _108272 is 122+1
   Exit: (367) [system] 123 is 122+1
^  Call: (367) [user] count_lines_in_stream(2000, (0x55aefe498890), 123, _5680)
^  Unify: (367) [user] count_lines_in_stream(2000, (0x55aefe498890), 123, _5680)
   Call: (368) [system] 123>=2000
^  Redo: (367) [user] count_lines_in_stream(2000, (0x55aefe498890), 123, _5680)
   Call: (368) [read_util] read_util:read_line_to_codes((0x55aefe498890), _113866)
   Exit: (368) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (chain (eval (map-atom ... |)
   Call: (368) [system] |    (chain (eval (map-atom ... |==end_of_file
^  Redo: (367) [user] count_lines_in_stream(2000, (0x55aefe498890), 123, _5680)
   Call: (368) [system] _117936 is 123+1
   Exit: (368) [system] 124 is 123+1
^  Call: (368) [user] count_lines_in_stream(2000, (0x55aefe498890), 124, _5680)
^  Unify: (368) [user] count_lines_in_stream(2000, (0x55aefe498890), 124, _5680)
   Call: (369) [system] 124>=2000
^  Redo: (368) [user] count_lines_in_stream(2000, (0x55aefe498890), 124, _5680)
   Call: (369) [read_util] read_util:read_line_to_codes((0x55aefe498890), _123530)
   Exit: (369) [read_util] read_util:read_line_to_codes((0x55aefe498890), |      (chain (eval (apply  ... |)
   Call: (369) [system] |      (chain (eval (apply  ... |==end_of_file
^  Redo: (368) [user] count_lines_in_stream(2000, (0x55aefe498890), 124, _5680)
   Call: (369) [system] _127576 is 124+1
   Exit: (369) [system] 125 is 124+1
^  Call: (369) [user] count_lines_in_stream(2000, (0x55aefe498890), 125, _5680)
^  Unify: (369) [user] count_lines_in_stream(2000, (0x55aefe498890), 125, _5680)
   Call: (370) [system] 125>=2000
^  Redo: (369) [user] count_lines_in_stream(2000, (0x55aefe498890), 125, _5680)
   Call: (370) [read_util] read_util:read_line_to_codes((0x55aefe498890), _133170)
   Exit: (370) [read_util] read_util:read_line_to_codes((0x55aefe498890), |        (chain $map-expr $ ... |)
   Call: (370) [system] |        (chain $map-expr $ ... |==end_of_file
^  Redo: (369) [user] count_lines_in_stream(2000, (0x55aefe498890), 125, _5680)
   Call: (370) [system] _137120 is 125+1
   Exit: (370) [system] 126 is 125+1
^  Call: (370) [user] count_lines_in_stream(2000, (0x55aefe498890), 126, _5680)
^  Unify: (370) [user] count_lines_in_stream(2000, (0x55aefe498890), 126, _5680)
   Call: (371) [system] 126>=2000
^  Redo: (370) [user] count_lines_in_stream(2000, (0x55aefe498890), 126, _5680)
   Call: (371) [read_util] read_util:read_line_to_codes((0x55aefe498890), _142714)
   Exit: (371) [read_util] read_util:read_line_to_codes((0x55aefe498890), |          (chain (cons-ato ... |)
   Call: (371) [system] |          (chain (cons-ato ... |==end_of_file
^  Redo: (370) [user] count_lines_in_stream(2000, (0x55aefe498890), 126, _5680)
   Call: (371) [system] _146910 is 126+1
   Exit: (371) [system] 127 is 126+1
^  Call: (371) [user] count_lines_in_stream(2000, (0x55aefe498890), 127, _5680)
^  Unify: (371) [user] count_lines_in_stream(2000, (0x55aefe498890), 127, _5680)
   Call: (372) [system] 127>=2000
^  Redo: (371) [user] count_lines_in_stream(2000, (0x55aefe498890), 127, _5680)
   Call: (372) [read_util] read_util:read_line_to_codes((0x55aefe498890), _152504)
   Exit: (372) [read_util] read_util:read_line_to_codes((0x55aefe498890), `    (return ()) ))))`)
   Call: (372) [system] `    (return ()) ))))`==end_of_file
^  Redo: (371) [user] count_lines_in_stream(2000, (0x55aefe498890), 127, _5680)
   Call: (372) [system] _156352 is 127+1
   Exit: (372) [system] 128 is 127+1
^  Call: (372) [user] count_lines_in_stream(2000, (0x55aefe498890), 128, _5680)
^  Unify: (372) [user] count_lines_in_stream(2000, (0x55aefe498890), 128, _5680)
   Call: (373) [system] 128>=2000
^  Redo: (372) [user] count_lines_in_stream(2000, (0x55aefe498890), 128, _5680)
   Call: (373) [read_util] read_util:read_line_to_codes((0x55aefe498890), _161946)
   Exit: (373) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (373) [system] []==end_of_file
^  Redo: (372) [user] count_lines_in_stream(2000, (0x55aefe498890), 128, _5680)
   Call: (373) [system] _165674 is 128+1
   Exit: (373) [system] 129 is 128+1
^  Call: (373) [user] count_lines_in_stream(2000, (0x55aefe498890), 129, _5680)
^  Unify: (373) [user] count_lines_in_stream(2000, (0x55aefe498890), 129, _5680)
   Call: (374) [system] 129>=2000
^  Redo: (373) [user] count_lines_in_stream(2000, (0x55aefe498890), 129, _5680)
   Call: (374) [read_util] read_util:read_line_to_codes((0x55aefe498890), _171268)
   Exit: (374) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: foldl-atom (-> Expressi ... |)
   Call: (374) [system] |(: foldl-atom (-> Expressi ... |==end_of_file
^  Redo: (373) [user] count_lines_in_stream(2000, (0x55aefe498890), 129, _5680)
   Call: (374) [system] _175374 is 129+1
   Exit: (374) [system] 130 is 129+1
^  Call: (374) [user] count_lines_in_stream(2000, (0x55aefe498890), 130, _5680)
^  Unify: (374) [user] count_lines_in_stream(2000, (0x55aefe498890), 130, _5680)
   Call: (375) [system] 130>=2000
^  Redo: (374) [user] count_lines_in_stream(2000, (0x55aefe498890), 130, _5680)
   Call: (375) [read_util] read_util:read_line_to_codes((0x55aefe498890), _180968)
   Exit: (375) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(= (foldl-atom $list $init ... |)
   Call: (375) [system] |(= (foldl-atom $list $init ... |==end_of_file
^  Redo: (374) [user] count_lines_in_stream(2000, (0x55aefe498890), 130, _5680)
   Call: (375) [system] _184918 is 130+1
   Exit: (375) [system] 131 is 130+1
^  Call: (375) [user] count_lines_in_stream(2000, (0x55aefe498890), 131, _5680)
^  Unify: (375) [user] count_lines_in_stream(2000, (0x55aefe498890), 131, _5680)
   Call: (376) [system] 131>=2000
^  Redo: (375) [user] count_lines_in_stream(2000, (0x55aefe498890), 131, _5680)
   Call: (376) [read_util] read_util:read_line_to_codes((0x55aefe498890), _190512)
   Exit: (376) [read_util] read_util:read_line_to_codes((0x55aefe498890), |  (function (eval (if-deco ... |)
   Call: (376) [system] |  (function (eval (if-deco ... |==end_of_file
^  Redo: (375) [user] count_lines_in_stream(2000, (0x55aefe498890), 131, _5680)
   Call: (376) [system] _194546 is 131+1
   Exit: (376) [system] 132 is 131+1
^  Call: (376) [user] count_lines_in_stream(2000, (0x55aefe498890), 132, _5680)
^  Unify: (376) [user] count_lines_in_stream(2000, (0x55aefe498890), 132, _5680)
   Call: (377) [system] 132>=2000
^  Redo: (376) [user] count_lines_in_stream(2000, (0x55aefe498890), 132, _5680)
   Call: (377) [read_util] read_util:read_line_to_codes((0x55aefe498890), _200140)
   Exit: (377) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (chain (eval (apply $i ... |)
   Call: (377) [system] |    (chain (eval (apply $i ... |==end_of_file
^  Redo: (376) [user] count_lines_in_stream(2000, (0x55aefe498890), 132, _5680)
   Call: (377) [system] _204150 is 132+1
   Exit: (377) [system] 133 is 132+1
^  Call: (377) [user] count_lines_in_stream(2000, (0x55aefe498890), 133, _5680)
^  Unify: (377) [user] count_lines_in_stream(2000, (0x55aefe498890), 133, _5680)
   Call: (378) [system] 133>=2000
^  Redo: (377) [user] count_lines_in_stream(2000, (0x55aefe498890), 133, _5680)
   Call: (378) [read_util] read_util:read_line_to_codes((0x55aefe498890), _209744)
   Exit: (378) [read_util] read_util:read_line_to_codes((0x55aefe498890), |      (chain (eval (apply  ... |)
   Call: (378) [system] |      (chain (eval (apply  ... |==end_of_file
^  Redo: (377) [user] count_lines_in_stream(2000, (0x55aefe498890), 133, _5680)
   Call: (378) [system] _213796 is 133+1
   Exit: (378) [system] 134 is 133+1
^  Call: (378) [user] count_lines_in_stream(2000, (0x55aefe498890), 134, _5680)
^  Unify: (378) [user] count_lines_in_stream(2000, (0x55aefe498890), 134, _5680)
   Call: (379) [system] 134>=2000
^  Redo: (378) [user] count_lines_in_stream(2000, (0x55aefe498890), 134, _5680)
   Call: (379) [read_util] read_util:read_line_to_codes((0x55aefe498890), _219390)
   Exit: (379) [read_util] read_util:read_line_to_codes((0x55aefe498890), |        (chain $op-head $h ... |)
   Call: (379) [system] |        (chain $op-head $h ... |==end_of_file
^  Redo: (378) [user] count_lines_in_stream(2000, (0x55aefe498890), 134, _5680)
   Call: (379) [system] _223334 is 134+1
   Exit: (379) [system] 135 is 134+1
^  Call: (379) [user] count_lines_in_stream(2000, (0x55aefe498890), 135, _5680)
^  Unify: (379) [user] count_lines_in_stream(2000, (0x55aefe498890), 135, _5680)
   Call: (380) [system] 135>=2000
^  Redo: (379) [user] count_lines_in_stream(2000, (0x55aefe498890), 135, _5680)
   Call: (380) [read_util] read_util:read_line_to_codes((0x55aefe498890), _228928)
   Exit: (380) [read_util] read_util:read_line_to_codes((0x55aefe498890), |          (chain (eval (fo ... |)
   Call: (380) [system] |          (chain (eval (fo ... |==end_of_file
^  Redo: (379) [user] count_lines_in_stream(2000, (0x55aefe498890), 135, _5680)
   Call: (380) [system] _233190 is 135+1
   Exit: (380) [system] 136 is 135+1
^  Call: (380) [user] count_lines_in_stream(2000, (0x55aefe498890), 136, _5680)
^  Unify: (380) [user] count_lines_in_stream(2000, (0x55aefe498890), 136, _5680)
   Call: (381) [system] 136>=2000
^  Redo: (380) [user] count_lines_in_stream(2000, (0x55aefe498890), 136, _5680)
   Call: (381) [read_util] read_util:read_line_to_codes((0x55aefe498890), _238784)
   Exit: (381) [read_util] read_util:read_line_to_codes((0x55aefe498890), `    (return $init) ))))`)
   Call: (381) [system] `    (return $init) ))))`==end_of_file
^  Redo: (380) [user] count_lines_in_stream(2000, (0x55aefe498890), 136, _5680)
   Call: (381) [system] _242650 is 136+1
   Exit: (381) [system] 137 is 136+1
^  Call: (381) [user] count_lines_in_stream(2000, (0x55aefe498890), 137, _5680)
^  Unify: (381) [user] count_lines_in_stream(2000, (0x55aefe498890), 137, _5680)
   Call: (382) [system] 137>=2000
^  Redo: (381) [user] count_lines_in_stream(2000, (0x55aefe498890), 137, _5680)
   Call: (382) [read_util] read_util:read_line_to_codes((0x55aefe498890), _248244)
   Exit: (382) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (382) [system] []==end_of_file
^  Redo: (381) [user] count_lines_in_stream(2000, (0x55aefe498890), 137, _5680)
   Call: (382) [system] _251972 is 137+1
   Exit: (382) [system] 138 is 137+1
^  Call: (382) [user] count_lines_in_stream(2000, (0x55aefe498890), 138, _5680)
^  Unify: (382) [user] count_lines_in_stream(2000, (0x55aefe498890), 138, _5680)
   Call: (383) [system] 138>=2000
^  Redo: (382) [user] count_lines_in_stream(2000, (0x55aefe498890), 138, _5680)
   Call: (383) [read_util] read_util:read_line_to_codes((0x55aefe498890), _257566)
   Exit: (383) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: separate-errors (-> Exp ... |)
   Call: (383) [system] |(: separate-errors (-> Exp ... |==end_of_file
^  Redo: (382) [user] count_lines_in_stream(2000, (0x55aefe498890), 138, _5680)
   Call: (383) [system] _261636 is 138+1
   Exit: (383) [system] 139 is 138+1
^  Call: (383) [user] count_lines_in_stream(2000, (0x55aefe498890), 139, _5680)
^  Unify: (383) [user] count_lines_in_stream(2000, (0x55aefe498890), 139, _5680)
   Call: (384) [system] 139>=2000
^  Redo: (383) [user] count_lines_in_stream(2000, (0x55aefe498890), 139, _5680)
   Call: (384) [read_util] read_util:read_line_to_codes((0x55aefe498890), _267230)
   Exit: (384) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(= (separate-errors $succ- ... |)
   Call: (384) [system] |(= (separate-errors $succ- ... |==end_of_file
^  Redo: (383) [user] count_lines_in_stream(2000, (0x55aefe498890), 139, _5680)
   Call: (384) [system] _271168 is 139+1
   Exit: (384) [system] 140 is 139+1
^  Call: (384) [user] count_lines_in_stream(2000, (0x55aefe498890), 140, _5680)
^  Unify: (384) [user] count_lines_in_stream(2000, (0x55aefe498890), 140, _5680)
   Call: (385) [system] 140>=2000
^  Redo: (384) [user] count_lines_in_stream(2000, (0x55aefe498890), 140, _5680)
   Call: (385) [read_util] read_util:read_line_to_codes((0x55aefe498890), _276762)
   Exit: (385) [read_util] read_util:read_line_to_codes((0x55aefe498890), |  (function (unify $succ-e ... |)
   Call: (385) [system] |  (function (unify $succ-e ... |==end_of_file
^  Redo: (384) [user] count_lines_in_stream(2000, (0x55aefe498890), 140, _5680)
   Call: (385) [system] _280730 is 140+1
   Exit: (385) [system] 141 is 140+1
^  Call: (385) [user] count_lines_in_stream(2000, (0x55aefe498890), 141, _5680)
^  Unify: (385) [user] count_lines_in_stream(2000, (0x55aefe498890), 141, _5680)
   Call: (386) [system] 141>=2000
^  Redo: (385) [user] count_lines_in_stream(2000, (0x55aefe498890), 141, _5680)
   Call: (386) [read_util] read_util:read_line_to_codes((0x55aefe498890), _286324)
   Exit: (386) [read_util] read_util:read_line_to_codes((0x55aefe498890), `    (unify $res ($a $_b)`)
   Call: (386) [system] `    (unify $res ($a $_b)`==end_of_file
^  Redo: (385) [user] count_lines_in_stream(2000, (0x55aefe498890), 141, _5680)
   Call: (386) [system] _290196 is 141+1
   Exit: (386) [system] 142 is 141+1
^  Call: (386) [user] count_lines_in_stream(2000, (0x55aefe498890), 142, _5680)
^  Unify: (386) [user] count_lines_in_stream(2000, (0x55aefe498890), 142, _5680)
   Call: (387) [system] 142>=2000
^  Redo: (386) [user] count_lines_in_stream(2000, (0x55aefe498890), 142, _5680)
   Call: (387) [read_util] read_util:read_line_to_codes((0x55aefe498890), _295790)
   Exit: (387) [read_util] read_util:read_line_to_codes((0x55aefe498890), `      (eval (if-error $a`)
   Call: (387) [system] `      (eval (if-error $a`==end_of_file
^  Redo: (386) [user] count_lines_in_stream(2000, (0x55aefe498890), 142, _5680)
   Call: (387) [system] _299662 is 142+1
   Exit: (387) [system] 143 is 142+1
^  Call: (387) [user] count_lines_in_stream(2000, (0x55aefe498890), 143, _5680)
^  Unify: (387) [user] count_lines_in_stream(2000, (0x55aefe498890), 143, _5680)
   Call: (388) [system] 143>=2000
^  Redo: (387) [user] count_lines_in_stream(2000, (0x55aefe498890), 143, _5680)
   Call: (388) [read_util] read_util:read_line_to_codes((0x55aefe498890), _305256)
   Exit: (388) [read_util] read_util:read_line_to_codes((0x55aefe498890), |        (chain (cons-atom  ... |)
   Call: (388) [system] |        (chain (cons-atom  ... |==end_of_file
^  Redo: (387) [user] count_lines_in_stream(2000, (0x55aefe498890), 143, _5680)
   Call: (388) [system] _309374 is 143+1
   Exit: (388) [system] 144 is 143+1
^  Call: (388) [user] count_lines_in_stream(2000, (0x55aefe498890), 144, _5680)
^  Unify: (388) [user] count_lines_in_stream(2000, (0x55aefe498890), 144, _5680)
   Call: (389) [system] 144>=2000
^  Redo: (388) [user] count_lines_in_stream(2000, (0x55aefe498890), 144, _5680)
   Call: (389) [read_util] read_util:read_line_to_codes((0x55aefe498890), _314968)
   Exit: (389) [read_util] read_util:read_line_to_codes((0x55aefe498890), |        (chain (cons-atom  ... |)
   Call: (389) [system] |        (chain (cons-atom  ... |==end_of_file
^  Redo: (388) [user] count_lines_in_stream(2000, (0x55aefe498890), 144, _5680)
   Call: (389) [system] _319104 is 144+1
   Exit: (389) [system] 145 is 144+1
^  Call: (389) [user] count_lines_in_stream(2000, (0x55aefe498890), 145, _5680)
^  Unify: (389) [user] count_lines_in_stream(2000, (0x55aefe498890), 145, _5680)
   Call: (390) [system] 145>=2000
^  Redo: (389) [user] count_lines_in_stream(2000, (0x55aefe498890), 145, _5680)
   Call: (390) [read_util] read_util:read_line_to_codes((0x55aefe498890), _324698)
   Exit: (390) [read_util] read_util:read_line_to_codes((0x55aefe498890), `      (return $succ-err))`)
   Call: (390) [system] `      (return $succ-err))`==end_of_file
^  Redo: (389) [user] count_lines_in_stream(2000, (0x55aefe498890), 145, _5680)
   Call: (390) [system] _328576 is 145+1
   Exit: (390) [system] 146 is 145+1
^  Call: (390) [user] count_lines_in_stream(2000, (0x55aefe498890), 146, _5680)
^  Unify: (390) [user] count_lines_in_stream(2000, (0x55aefe498890), 146, _5680)
   Call: (391) [system] 146>=2000
^  Redo: (390) [user] count_lines_in_stream(2000, (0x55aefe498890), 146, _5680)
   Call: (391) [read_util] read_util:read_line_to_codes((0x55aefe498890), _334170)
   Exit: (391) [read_util] read_util:read_line_to_codes((0x55aefe498890), `    (return $succ-err) )))`)
   Call: (391) [system] `    (return $succ-err) )))`==end_of_file
^  Redo: (390) [user] count_lines_in_stream(2000, (0x55aefe498890), 146, _5680)
   Call: (391) [system] _338054 is 146+1
   Exit: (391) [system] 147 is 146+1
^  Call: (391) [user] count_lines_in_stream(2000, (0x55aefe498890), 147, _5680)
^  Unify: (391) [user] count_lines_in_stream(2000, (0x55aefe498890), 147, _5680)
   Call: (392) [system] 147>=2000
^  Redo: (391) [user] count_lines_in_stream(2000, (0x55aefe498890), 147, _5680)
   Call: (392) [read_util] read_util:read_line_to_codes((0x55aefe498890), _343648)
   Exit: (392) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (392) [system] []==end_of_file
^  Redo: (391) [user] count_lines_in_stream(2000, (0x55aefe498890), 147, _5680)
   Call: (392) [system] _347376 is 147+1
   Exit: (392) [system] 148 is 147+1
^  Call: (392) [user] count_lines_in_stream(2000, (0x55aefe498890), 148, _5680)
^  Unify: (392) [user] count_lines_in_stream(2000, (0x55aefe498890), 148, _5680)
   Call: (393) [system] 148>=2000
^  Redo: (392) [user] count_lines_in_stream(2000, (0x55aefe498890), 148, _5680)
   Call: (393) [read_util] read_util:read_line_to_codes((0x55aefe498890), _352970)
   Exit: (393) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (check-alternatives $atom)`)
   Call: (393) [system] `(= (check-alternatives $atom)`==end_of_file
^  Redo: (392) [user] count_lines_in_stream(2000, (0x55aefe498890), 148, _5680)
   Call: (393) [system] _356872 is 148+1
   Exit: (393) [system] 149 is 148+1
^  Call: (393) [user] count_lines_in_stream(2000, (0x55aefe498890), 149, _5680)
^  Unify: (393) [user] count_lines_in_stream(2000, (0x55aefe498890), 149, _5680)
   Call: (394) [system] 149>=2000
^  Redo: (393) [user] count_lines_in_stream(2000, (0x55aefe498890), 149, _5680)
   Call: (394) [read_util] read_util:read_line_to_codes((0x55aefe498890), _362466)
   Exit: (394) [read_util] read_util:read_line_to_codes((0x55aefe498890), `  (function`)
   Call: (394) [system] `  (function`==end_of_file
^  Redo: (393) [user] count_lines_in_stream(2000, (0x55aefe498890), 149, _5680)
   Call: (394) [system] _366260 is 149+1
   Exit: (394) [system] 150 is 149+1
^  Call: (394) [user] count_lines_in_stream(2000, (0x55aefe498890), 150, _5680)
^  Unify: (394) [user] count_lines_in_stream(2000, (0x55aefe498890), 150, _5680)
   Call: (395) [system] 150>=2000
^  Redo: (394) [user] count_lines_in_stream(2000, (0x55aefe498890), 150, _5680)
   Call: (395) [read_util] read_util:read_line_to_codes((0x55aefe498890), _371854)
   Exit: (395) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (chain (collapse-bind  ... |)
   Call: (395) [system] |    (chain (collapse-bind  ... |==end_of_file
^  Redo: (394) [user] count_lines_in_stream(2000, (0x55aefe498890), 150, _5680)
   Call: (395) [system] _375840 is 150+1
   Exit: (395) [system] 151 is 150+1
^  Call: (395) [user] count_lines_in_stream(2000, (0x55aefe498890), 151, _5680)
^  Unify: (395) [user] count_lines_in_stream(2000, (0x55aefe498890), 151, _5680)
   Call: (396) [system] 151>=2000
^  Redo: (395) [user] count_lines_in_stream(2000, (0x55aefe498890), 151, _5680)
   Call: (396) [read_util] read_util:read_line_to_codes((0x55aefe498890), _381434)
   Exit: (396) [read_util] read_util:read_line_to_codes((0x55aefe498890), |      (chain (eval (foldl- ... |)
   Call: (396) [system] |      (chain (eval (foldl- ... |==end_of_file
^  Redo: (395) [user] count_lines_in_stream(2000, (0x55aefe498890), 151, _5680)
   Call: (396) [system] _385546 is 151+1
   Exit: (396) [system] 152 is 151+1
^  Call: (396) [user] count_lines_in_stream(2000, (0x55aefe498890), 152, _5680)
^  Unify: (396) [user] count_lines_in_stream(2000, (0x55aefe498890), 152, _5680)
   Call: (397) [system] 152>=2000
^  Redo: (396) [user] count_lines_in_stream(2000, (0x55aefe498890), 152, _5680)
   Call: (397) [read_util] read_util:read_line_to_codes((0x55aefe498890), _391140)
   Exit: (397) [read_util] read_util:read_line_to_codes((0x55aefe498890), |        (eval (separate-er ... |)
   Call: (397) [system] |        (eval (separate-er ... |==end_of_file
^  Redo: (396) [user] count_lines_in_stream(2000, (0x55aefe498890), 152, _5680)
   Call: (397) [system] _395228 is 152+1
   Exit: (397) [system] 153 is 152+1
^  Call: (397) [user] count_lines_in_stream(2000, (0x55aefe498890), 153, _5680)
^  Unify: (397) [user] count_lines_in_stream(2000, (0x55aefe498890), 153, _5680)
   Call: (398) [system] 153>=2000
^  Redo: (397) [user] count_lines_in_stream(2000, (0x55aefe498890), 153, _5680)
   Call: (398) [read_util] read_util:read_line_to_codes((0x55aefe498890), _400822)
   Exit: (398) [read_util] read_util:read_line_to_codes((0x55aefe498890), |        (unify $separated  ... |)
   Call: (398) [system] |        (unify $separated  ... |==end_of_file
^  Redo: (397) [user] count_lines_in_stream(2000, (0x55aefe498890), 153, _5680)
   Call: (398) [system] _404808 is 153+1
   Exit: (398) [system] 154 is 153+1
^  Call: (398) [user] count_lines_in_stream(2000, (0x55aefe498890), 154, _5680)
^  Unify: (398) [user] count_lines_in_stream(2000, (0x55aefe498890), 154, _5680)
   Call: (399) [system] 154>=2000
^  Redo: (398) [user] count_lines_in_stream(2000, (0x55aefe498890), 154, _5680)
   Call: (399) [read_util] read_util:read_line_to_codes((0x55aefe498890), _410402)
   Exit: (399) [read_util] read_util:read_line_to_codes((0x55aefe498890), |          (chain (eval (if ... |)
   Call: (399) [system] |          (chain (eval (if ... |==end_of_file
^  Redo: (398) [user] count_lines_in_stream(2000, (0x55aefe498890), 154, _5680)
   Call: (399) [system] _414562 is 154+1
   Exit: (399) [system] 155 is 154+1
^  Call: (399) [user] count_lines_in_stream(2000, (0x55aefe498890), 155, _5680)
^  Unify: (399) [user] count_lines_in_stream(2000, (0x55aefe498890), 155, _5680)
   Call: (400) [system] 155>=2000
^  Redo: (399) [user] count_lines_in_stream(2000, (0x55aefe498890), 155, _5680)
   Call: (400) [read_util] read_util:read_line_to_codes((0x55aefe498890), _420156)
   Exit: (400) [read_util] read_util:read_line_to_codes((0x55aefe498890), |            (chain (superp ... |)
   Call: (400) [system] |            (chain (superp ... |==end_of_file
^  Redo: (399) [user] count_lines_in_stream(2000, (0x55aefe498890), 155, _5680)
   Call: (400) [system] _424286 is 155+1
   Exit: (400) [system] 156 is 155+1
^  Call: (400) [user] count_lines_in_stream(2000, (0x55aefe498890), 156, _5680)
^  Unify: (400) [user] count_lines_in_stream(2000, (0x55aefe498890), 156, _5680)
   Call: (401) [system] 156>=2000
^  Redo: (400) [user] count_lines_in_stream(2000, (0x55aefe498890), 156, _5680)
   Call: (401) [read_util] read_util:read_line_to_codes((0x55aefe498890), _429880)
   Exit: (401) [read_util] read_util:read_line_to_codes((0x55aefe498890), |          (return (Error ( ... |)
   Call: (401) [system] |          (return (Error ( ... |==end_of_file
^  Redo: (400) [user] count_lines_in_stream(2000, (0x55aefe498890), 156, _5680)
   Call: (401) [system] _434232 is 156+1
   Exit: (401) [system] 157 is 156+1
^  Call: (401) [user] count_lines_in_stream(2000, (0x55aefe498890), 157, _5680)
^  Unify: (401) [user] count_lines_in_stream(2000, (0x55aefe498890), 157, _5680)
   Call: (402) [system] 157>=2000
^  Redo: (401) [user] count_lines_in_stream(2000, (0x55aefe498890), 157, _5680)
   Call: (402) [read_util] read_util:read_line_to_codes((0x55aefe498890), _439826)
   Exit: (402) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (402) [system] []==end_of_file
^  Redo: (401) [user] count_lines_in_stream(2000, (0x55aefe498890), 157, _5680)
   Call: (402) [system] _443554 is 157+1
   Exit: (402) [system] 158 is 157+1
^  Call: (402) [user] count_lines_in_stream(2000, (0x55aefe498890), 158, _5680)
^  Unify: (402) [user] count_lines_in_stream(2000, (0x55aefe498890), 158, _5680)
   Call: (403) [system] 158>=2000
^  Redo: (402) [user] count_lines_in_stream(2000, (0x55aefe498890), 158, _5680)
   Call: (403) [read_util] read_util:read_line_to_codes((0x55aefe498890), _449148)
   Exit: (403) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(= (interpret $atom $type  ... |)
   Call: (403) [system] |(= (interpret $atom $type  ... |==end_of_file
^  Redo: (402) [user] count_lines_in_stream(2000, (0x55aefe498890), 158, _5680)
   Call: (403) [system] _453074 is 158+1
   Exit: (403) [system] 159 is 158+1
^  Call: (403) [user] count_lines_in_stream(2000, (0x55aefe498890), 159, _5680)
^  Unify: (403) [user] count_lines_in_stream(2000, (0x55aefe498890), 159, _5680)
   Call: (404) [system] 159>=2000
^  Redo: (403) [user] count_lines_in_stream(2000, (0x55aefe498890), 159, _5680)
   Call: (404) [read_util] read_util:read_line_to_codes((0x55aefe498890), _458668)
   Exit: (404) [read_util] read_util:read_line_to_codes((0x55aefe498890), |  (function (chain (eval ( ... |)
   Call: (404) [system] |  (function (chain (eval ( ... |==end_of_file
^  Redo: (403) [user] count_lines_in_stream(2000, (0x55aefe498890), 159, _5680)
   Call: (404) [system] _462708 is 159+1
   Exit: (404) [system] 160 is 159+1
^  Call: (404) [user] count_lines_in_stream(2000, (0x55aefe498890), 160, _5680)
^  Unify: (404) [user] count_lines_in_stream(2000, (0x55aefe498890), 160, _5680)
   Call: (405) [system] 160>=2000
^  Redo: (404) [user] count_lines_in_stream(2000, (0x55aefe498890), 160, _5680)
   Call: (405) [read_util] read_util:read_line_to_codes((0x55aefe498890), _468302)
   Exit: (405) [read_util] read_util:read_line_to_codes((0x55aefe498890), `    (eval (if-equal $type Atom`)
   Call: (405) [system] `    (eval (if-equal $type Atom`==end_of_file
^  Redo: (404) [user] count_lines_in_stream(2000, (0x55aefe498890), 160, _5680)
   Call: (405) [system] _472210 is 160+1
   Exit: (405) [system] 161 is 160+1
^  Call: (405) [user] count_lines_in_stream(2000, (0x55aefe498890), 161, _5680)
^  Unify: (405) [user] count_lines_in_stream(2000, (0x55aefe498890), 161, _5680)
   Call: (406) [system] 161>=2000
^  Redo: (405) [user] count_lines_in_stream(2000, (0x55aefe498890), 161, _5680)
   Call: (406) [read_util] read_util:read_line_to_codes((0x55aefe498890), _477804)
   Exit: (406) [read_util] read_util:read_line_to_codes((0x55aefe498890), `      (return $atom)`)
   Call: (406) [system] `      (return $atom)`==end_of_file
^  Redo: (405) [user] count_lines_in_stream(2000, (0x55aefe498890), 161, _5680)
   Call: (406) [system] _481652 is 161+1
   Exit: (406) [system] 162 is 161+1
^  Call: (406) [user] count_lines_in_stream(2000, (0x55aefe498890), 162, _5680)
^  Unify: (406) [user] count_lines_in_stream(2000, (0x55aefe498890), 162, _5680)
   Call: (407) [system] 162>=2000
^  Redo: (406) [user] count_lines_in_stream(2000, (0x55aefe498890), 162, _5680)
   Call: (407) [read_util] read_util:read_line_to_codes((0x55aefe498890), _487246)
   Exit: (407) [read_util] read_util:read_line_to_codes((0x55aefe498890), |      (eval (if-equal $typ ... |)
   Call: (407) [system] |      (eval (if-equal $typ ... |==end_of_file
^  Redo: (406) [user] count_lines_in_stream(2000, (0x55aefe498890), 162, _5680)
   Call: (407) [system] _491172 is 162+1
   Exit: (407) [system] 163 is 162+1
^  Call: (407) [user] count_lines_in_stream(2000, (0x55aefe498890), 163, _5680)
^  Unify: (407) [user] count_lines_in_stream(2000, (0x55aefe498890), 163, _5680)
   Call: (408) [system] 163>=2000
^  Redo: (407) [user] count_lines_in_stream(2000, (0x55aefe498890), 163, _5680)
   Call: (408) [read_util] read_util:read_line_to_codes((0x55aefe498890), _496766)
   Exit: (408) [read_util] read_util:read_line_to_codes((0x55aefe498890), `        (return $atom)`)
   Call: (408) [system] `        (return $atom)`==end_of_file
^  Redo: (407) [user] count_lines_in_stream(2000, (0x55aefe498890), 163, _5680)
   Call: (408) [system] _500626 is 163+1
   Exit: (408) [system] 164 is 163+1
^  Call: (408) [user] count_lines_in_stream(2000, (0x55aefe498890), 164, _5680)
^  Unify: (408) [user] count_lines_in_stream(2000, (0x55aefe498890), 164, _5680)
   Call: (409) [system] 164>=2000
^  Redo: (408) [user] count_lines_in_stream(2000, (0x55aefe498890), 164, _5680)
   Call: (409) [read_util] read_util:read_line_to_codes((0x55aefe498890), _506220)
   Exit: (409) [read_util] read_util:read_line_to_codes((0x55aefe498890), |        (eval (switch ($ty ... |)
   Call: (409) [system] |        (eval (switch ($ty ... |==end_of_file
^  Redo: (408) [user] count_lines_in_stream(2000, (0x55aefe498890), 164, _5680)
   Call: (409) [system] _510170 is 164+1
   Exit: (409) [system] 165 is 164+1
^  Call: (409) [user] count_lines_in_stream(2000, (0x55aefe498890), 165, _5680)
^  Unify: (409) [user] count_lines_in_stream(2000, (0x55aefe498890), 165, _5680)
   Call: (410) [system] 165>=2000
^  Redo: (409) [user] count_lines_in_stream(2000, (0x55aefe498890), 165, _5680)
   Call: (410) [read_util] read_util:read_line_to_codes((0x55aefe498890), _515764)
   Exit: (410) [read_util] read_util:read_line_to_codes((0x55aefe498890), |          (($type Variable ... |)
   Call: (410) [system] |          (($type Variable ... |==end_of_file
^  Redo: (409) [user] count_lines_in_stream(2000, (0x55aefe498890), 165, _5680)
   Call: (410) [system] _519750 is 165+1
   Exit: (410) [system] 166 is 165+1
^  Call: (410) [user] count_lines_in_stream(2000, (0x55aefe498890), 166, _5680)
^  Unify: (410) [user] count_lines_in_stream(2000, (0x55aefe498890), 166, _5680)
   Call: (411) [system] 166>=2000
^  Redo: (410) [user] count_lines_in_stream(2000, (0x55aefe498890), 166, _5680)
   Call: (411) [read_util] read_util:read_line_to_codes((0x55aefe498890), _44626)
   Exit: (411) [read_util] read_util:read_line_to_codes((0x55aefe498890), `          (($type Symbol)`)
   Call: (411) [system] `          (($type Symbol)`==end_of_file
^  Redo: (410) [user] count_lines_in_stream(2000, (0x55aefe498890), 166, _5680)
   Call: (411) [system] _48504 is 166+1
   Exit: (411) [system] 167 is 166+1
^  Call: (411) [user] count_lines_in_stream(2000, (0x55aefe498890), 167, _5680)
^  Unify: (411) [user] count_lines_in_stream(2000, (0x55aefe498890), 167, _5680)
   Call: (412) [system] 167>=2000
^  Redo: (411) [user] count_lines_in_stream(2000, (0x55aefe498890), 167, _5680)
   Call: (412) [read_util] read_util:read_line_to_codes((0x55aefe498890), _54098)
   Exit: (412) [read_util] read_util:read_line_to_codes((0x55aefe498890), |            (chain (eval ( ... |)
   Call: (412) [system] |            (chain (eval ( ... |==end_of_file
^  Redo: (411) [user] count_lines_in_stream(2000, (0x55aefe498890), 167, _5680)
   Call: (412) [system] _58288 is 167+1
   Exit: (412) [system] 168 is 167+1
^  Call: (412) [user] count_lines_in_stream(2000, (0x55aefe498890), 168, _5680)
^  Unify: (412) [user] count_lines_in_stream(2000, (0x55aefe498890), 168, _5680)
   Call: (413) [system] 168>=2000
^  Redo: (412) [user] count_lines_in_stream(2000, (0x55aefe498890), 168, _5680)
   Call: (413) [read_util] read_util:read_line_to_codes((0x55aefe498890), _63882)
   Exit: (413) [read_util] read_util:read_line_to_codes((0x55aefe498890), `          (($type Grounded)`)
   Call: (413) [system] `          (($type Grounded)`==end_of_file
^  Redo: (412) [user] count_lines_in_stream(2000, (0x55aefe498890), 168, _5680)
   Call: (413) [system] _67772 is 168+1
   Exit: (413) [system] 169 is 168+1
^  Call: (413) [user] count_lines_in_stream(2000, (0x55aefe498890), 169, _5680)
^  Unify: (413) [user] count_lines_in_stream(2000, (0x55aefe498890), 169, _5680)
   Call: (414) [system] 169>=2000
^  Redo: (413) [user] count_lines_in_stream(2000, (0x55aefe498890), 169, _5680)
   Call: (414) [read_util] read_util:read_line_to_codes((0x55aefe498890), _73366)
   Exit: (414) [read_util] read_util:read_line_to_codes((0x55aefe498890), |            (chain (eval ( ... |)
   Call: (414) [system] |            (chain (eval ( ... |==end_of_file
^  Redo: (413) [user] count_lines_in_stream(2000, (0x55aefe498890), 169, _5680)
   Call: (414) [system] _77556 is 169+1
   Exit: (414) [system] 170 is 169+1
^  Call: (414) [user] count_lines_in_stream(2000, (0x55aefe498890), 170, _5680)
^  Unify: (414) [user] count_lines_in_stream(2000, (0x55aefe498890), 170, _5680)
   Call: (415) [system] 170>=2000
^  Redo: (414) [user] count_lines_in_stream(2000, (0x55aefe498890), 170, _5680)
   Call: (415) [read_util] read_util:read_line_to_codes((0x55aefe498890), _83150)
   Exit: (415) [read_util] read_util:read_line_to_codes((0x55aefe498890), `          (($type Expression)`)
   Call: (415) [system] `          (($type Expression)`==end_of_file
^  Redo: (414) [user] count_lines_in_stream(2000, (0x55aefe498890), 170, _5680)
   Call: (415) [system] _87052 is 170+1
   Exit: (415) [system] 171 is 170+1
^  Call: (415) [user] count_lines_in_stream(2000, (0x55aefe498890), 171, _5680)
^  Unify: (415) [user] count_lines_in_stream(2000, (0x55aefe498890), 171, _5680)
   Call: (416) [system] 171>=2000
^  Redo: (415) [user] count_lines_in_stream(2000, (0x55aefe498890), 171, _5680)
   Call: (416) [read_util] read_util:read_line_to_codes((0x55aefe498890), _92646)
   Exit: (416) [read_util] read_util:read_line_to_codes((0x55aefe498890), |            (chain (eval ( ... |)
   Call: (416) [system] |            (chain (eval ( ... |==end_of_file
^  Redo: (415) [user] count_lines_in_stream(2000, (0x55aefe498890), 171, _5680)
   Call: (416) [system] _97070 is 171+1
   Exit: (416) [system] 172 is 171+1
^  Call: (416) [user] count_lines_in_stream(2000, (0x55aefe498890), 172, _5680)
^  Unify: (416) [user] count_lines_in_stream(2000, (0x55aefe498890), 172, _5680)
   Call: (417) [system] 172>=2000
^  Redo: (416) [user] count_lines_in_stream(2000, (0x55aefe498890), 172, _5680)
   Call: (417) [read_util] read_util:read_line_to_codes((0x55aefe498890), _102664)
   Exit: (417) [read_util] read_util:read_line_to_codes((0x55aefe498890), `        ))))))))))`)
   Call: (417) [system] `        ))))))))))`==end_of_file
^  Redo: (416) [user] count_lines_in_stream(2000, (0x55aefe498890), 172, _5680)
   Call: (417) [system] _106500 is 172+1
   Exit: (417) [system] 173 is 172+1
^  Call: (417) [user] count_lines_in_stream(2000, (0x55aefe498890), 173, _5680)
^  Unify: (417) [user] count_lines_in_stream(2000, (0x55aefe498890), 173, _5680)
   Call: (418) [system] 173>=2000
^  Redo: (417) [user] count_lines_in_stream(2000, (0x55aefe498890), 173, _5680)
   Call: (418) [read_util] read_util:read_line_to_codes((0x55aefe498890), _112094)
   Exit: (418) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (418) [system] []==end_of_file
^  Redo: (417) [user] count_lines_in_stream(2000, (0x55aefe498890), 173, _5680)
   Call: (418) [system] _115822 is 173+1
   Exit: (418) [system] 174 is 173+1
^  Call: (418) [user] count_lines_in_stream(2000, (0x55aefe498890), 174, _5680)
^  Unify: (418) [user] count_lines_in_stream(2000, (0x55aefe498890), 174, _5680)
   Call: (419) [system] 174>=2000
^  Redo: (418) [user] count_lines_in_stream(2000, (0x55aefe498890), 174, _5680)
   Call: (419) [read_util] read_util:read_line_to_codes((0x55aefe498890), _121416)
   Exit: (419) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(= (interpret-expression $ ... |)
   Call: (419) [system] |(= (interpret-expression $ ... |==end_of_file
^  Redo: (418) [user] count_lines_in_stream(2000, (0x55aefe498890), 174, _5680)
   Call: (419) [system] _125408 is 174+1
   Exit: (419) [system] 175 is 174+1
^  Call: (419) [user] count_lines_in_stream(2000, (0x55aefe498890), 175, _5680)
^  Unify: (419) [user] count_lines_in_stream(2000, (0x55aefe498890), 175, _5680)
   Call: (420) [system] 175>=2000
^  Redo: (419) [user] count_lines_in_stream(2000, (0x55aefe498890), 175, _5680)
   Call: (420) [read_util] read_util:read_line_to_codes((0x55aefe498890), _131002)
   Exit: (420) [read_util] read_util:read_line_to_codes((0x55aefe498890), |  (function (eval (if-deco ... |)
   Call: (420) [system] |  (function (eval (if-deco ... |==end_of_file
^  Redo: (419) [user] count_lines_in_stream(2000, (0x55aefe498890), 175, _5680)
   Call: (420) [system] _135024 is 175+1
   Exit: (420) [system] 176 is 175+1
^  Call: (420) [user] count_lines_in_stream(2000, (0x55aefe498890), 176, _5680)
^  Unify: (420) [user] count_lines_in_stream(2000, (0x55aefe498890), 176, _5680)
   Call: (421) [system] 176>=2000
^  Redo: (420) [user] count_lines_in_stream(2000, (0x55aefe498890), 176, _5680)
   Call: (421) [read_util] read_util:read_line_to_codes((0x55aefe498890), _140618)
   Exit: (421) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (chain (eval (get-type ... |)
   Call: (421) [system] |    (chain (eval (get-type ... |==end_of_file
^  Redo: (420) [user] count_lines_in_stream(2000, (0x55aefe498890), 176, _5680)
   Call: (421) [system] _144634 is 176+1
   Exit: (421) [system] 177 is 176+1
^  Call: (421) [user] count_lines_in_stream(2000, (0x55aefe498890), 177, _5680)
^  Unify: (421) [user] count_lines_in_stream(2000, (0x55aefe498890), 177, _5680)
   Call: (422) [system] 177>=2000
^  Redo: (421) [user] count_lines_in_stream(2000, (0x55aefe498890), 177, _5680)
   Call: (422) [read_util] read_util:read_line_to_codes((0x55aefe498890), _150228)
   Exit: (422) [read_util] read_util:read_line_to_codes((0x55aefe498890), |      (chain (eval (is-fun ... |)
   Call: (422) [system] |      (chain (eval (is-fun ... |==end_of_file
^  Redo: (421) [user] count_lines_in_stream(2000, (0x55aefe498890), 177, _5680)
   Call: (422) [system] _154262 is 177+1
   Exit: (422) [system] 178 is 177+1
^  Call: (422) [user] count_lines_in_stream(2000, (0x55aefe498890), 178, _5680)
^  Unify: (422) [user] count_lines_in_stream(2000, (0x55aefe498890), 178, _5680)
   Call: (423) [system] 178>=2000
^  Redo: (422) [user] count_lines_in_stream(2000, (0x55aefe498890), 178, _5680)
   Call: (423) [read_util] read_util:read_line_to_codes((0x55aefe498890), _159856)
   Exit: (423) [read_util] read_util:read_line_to_codes((0x55aefe498890), `        (unify $is-func True`)
   Call: (423) [system] `        (unify $is-func True`==end_of_file
^  Redo: (422) [user] count_lines_in_stream(2000, (0x55aefe498890), 178, _5680)
   Call: (423) [system] _163752 is 178+1
   Exit: (423) [system] 179 is 178+1
^  Call: (423) [user] count_lines_in_stream(2000, (0x55aefe498890), 179, _5680)
^  Unify: (423) [user] count_lines_in_stream(2000, (0x55aefe498890), 179, _5680)
   Call: (424) [system] 179>=2000
^  Redo: (423) [user] count_lines_in_stream(2000, (0x55aefe498890), 179, _5680)
   Call: (424) [read_util] read_util:read_line_to_codes((0x55aefe498890), _169346)
   Exit: (424) [read_util] read_util:read_line_to_codes((0x55aefe498890), |          (chain (eval (in ... |)
   Call: (424) [system] |          (chain (eval (in ... |==end_of_file
^  Redo: (423) [user] count_lines_in_stream(2000, (0x55aefe498890), 179, _5680)
   Call: (424) [system] _173566 is 179+1
   Exit: (424) [system] 180 is 179+1
^  Call: (424) [user] count_lines_in_stream(2000, (0x55aefe498890), 180, _5680)
^  Unify: (424) [user] count_lines_in_stream(2000, (0x55aefe498890), 180, _5680)
   Call: (425) [system] 180>=2000
^  Redo: (424) [user] count_lines_in_stream(2000, (0x55aefe498890), 180, _5680)
   Call: (425) [read_util] read_util:read_line_to_codes((0x55aefe498890), _179160)
   Exit: (425) [read_util] read_util:read_line_to_codes((0x55aefe498890), |            (chain (eval ( ... |)
   Call: (425) [system] |            (chain (eval ( ... |==end_of_file
^  Redo: (424) [user] count_lines_in_stream(2000, (0x55aefe498890), 180, _5680)
   Call: (425) [system] _183410 is 180+1
   Exit: (425) [system] 181 is 180+1
^  Call: (425) [user] count_lines_in_stream(2000, (0x55aefe498890), 181, _5680)
^  Unify: (425) [user] count_lines_in_stream(2000, (0x55aefe498890), 181, _5680)
   Call: (426) [system] 181>=2000
^  Redo: (425) [user] count_lines_in_stream(2000, (0x55aefe498890), 181, _5680)
   Call: (426) [read_util] read_util:read_line_to_codes((0x55aefe498890), _189004)
   Exit: (426) [read_util] read_util:read_line_to_codes((0x55aefe498890), |          (chain (eval (in ... |)
   Call: (426) [system] |          (chain (eval (in ... |==end_of_file
^  Redo: (425) [user] count_lines_in_stream(2000, (0x55aefe498890), 181, _5680)
   Call: (426) [system] _193140 is 181+1
   Exit: (426) [system] 182 is 181+1
^  Call: (426) [user] count_lines_in_stream(2000, (0x55aefe498890), 182, _5680)
^  Unify: (426) [user] count_lines_in_stream(2000, (0x55aefe498890), 182, _5680)
   Call: (427) [system] 182>=2000
^  Redo: (426) [user] count_lines_in_stream(2000, (0x55aefe498890), 182, _5680)
   Call: (427) [read_util] read_util:read_line_to_codes((0x55aefe498890), _198734)
   Exit: (427) [read_util] read_util:read_line_to_codes((0x55aefe498890), |            (chain (eval ( ... |)
   Call: (427) [system] |            (chain (eval ( ... |==end_of_file
^  Redo: (426) [user] count_lines_in_stream(2000, (0x55aefe498890), 182, _5680)
   Call: (427) [system] _203002 is 182+1
   Exit: (427) [system] 183 is 182+1
^  Call: (427) [user] count_lines_in_stream(2000, (0x55aefe498890), 183, _5680)
^  Unify: (427) [user] count_lines_in_stream(2000, (0x55aefe498890), 183, _5680)
   Call: (428) [system] 183>=2000
^  Redo: (427) [user] count_lines_in_stream(2000, (0x55aefe498890), 183, _5680)
   Call: (428) [read_util] read_util:read_line_to_codes((0x55aefe498890), _208596)
   Exit: (428) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (chain (eval (type-cas ... |)
   Call: (428) [system] |    (chain (eval (type-cas ... |==end_of_file
^  Redo: (427) [user] count_lines_in_stream(2000, (0x55aefe498890), 183, _5680)
   Call: (428) [system] _212762 is 183+1
   Exit: (428) [system] 184 is 183+1
^  Call: (428) [user] count_lines_in_stream(2000, (0x55aefe498890), 184, _5680)
^  Unify: (428) [user] count_lines_in_stream(2000, (0x55aefe498890), 184, _5680)
   Call: (429) [system] 184>=2000
^  Redo: (428) [user] count_lines_in_stream(2000, (0x55aefe498890), 184, _5680)
   Call: (429) [read_util] read_util:read_line_to_codes((0x55aefe498890), _218356)
   Exit: (429) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (429) [system] []==end_of_file
^  Redo: (428) [user] count_lines_in_stream(2000, (0x55aefe498890), 184, _5680)
   Call: (429) [system] _222084 is 184+1
   Exit: (429) [system] 185 is 184+1
^  Call: (429) [user] count_lines_in_stream(2000, (0x55aefe498890), 185, _5680)
^  Unify: (429) [user] count_lines_in_stream(2000, (0x55aefe498890), 185, _5680)
   Call: (430) [system] 185>=2000
^  Redo: (429) [user] count_lines_in_stream(2000, (0x55aefe498890), 185, _5680)
   Call: (430) [read_util] read_util:read_line_to_codes((0x55aefe498890), _227678)
   Exit: (430) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(= (interpret-func $expr $ ... |)
   Call: (430) [system] |(= (interpret-func $expr $ ... |==end_of_file
^  Redo: (429) [user] count_lines_in_stream(2000, (0x55aefe498890), 185, _5680)
   Call: (430) [system] _231694 is 185+1
   Exit: (430) [system] 186 is 185+1
^  Call: (430) [user] count_lines_in_stream(2000, (0x55aefe498890), 186, _5680)
^  Unify: (430) [user] count_lines_in_stream(2000, (0x55aefe498890), 186, _5680)
   Call: (431) [system] 186>=2000
^  Redo: (430) [user] count_lines_in_stream(2000, (0x55aefe498890), 186, _5680)
   Call: (431) [read_util] read_util:read_line_to_codes((0x55aefe498890), _237288)
   Exit: (431) [read_util] read_util:read_line_to_codes((0x55aefe498890), |  (function (eval (if-deco ... |)
   Call: (431) [system] |  (function (eval (if-deco ... |==end_of_file
^  Redo: (430) [user] count_lines_in_stream(2000, (0x55aefe498890), 186, _5680)
   Call: (431) [system] _241310 is 186+1
   Exit: (431) [system] 187 is 186+1
^  Call: (431) [user] count_lines_in_stream(2000, (0x55aefe498890), 187, _5680)
^  Unify: (431) [user] count_lines_in_stream(2000, (0x55aefe498890), 187, _5680)
   Call: (432) [system] 187>=2000
^  Redo: (431) [user] count_lines_in_stream(2000, (0x55aefe498890), 187, _5680)
   Call: (432) [read_util] read_util:read_line_to_codes((0x55aefe498890), _246904)
   Exit: (432) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (chain (eval (interpre ... |)
   Call: (432) [system] |    (chain (eval (interpre ... |==end_of_file
^  Redo: (431) [user] count_lines_in_stream(2000, (0x55aefe498890), 187, _5680)
   Call: (432) [system] _250980 is 187+1
   Exit: (432) [system] 188 is 187+1
^  Call: (432) [user] count_lines_in_stream(2000, (0x55aefe498890), 188, _5680)
^  Unify: (432) [user] count_lines_in_stream(2000, (0x55aefe498890), 188, _5680)
   Call: (433) [system] 188>=2000
^  Redo: (432) [user] count_lines_in_stream(2000, (0x55aefe498890), 188, _5680)
   Call: (433) [read_util] read_util:read_line_to_codes((0x55aefe498890), _256574)
   Exit: (433) [read_util] read_util:read_line_to_codes((0x55aefe498890), |      (eval (return-on-err ... |)
   Call: (433) [system] |      (eval (return-on-err ... |==end_of_file
^  Redo: (432) [user] count_lines_in_stream(2000, (0x55aefe498890), 188, _5680)
   Call: (433) [system] _260542 is 188+1
   Exit: (433) [system] 189 is 188+1
^  Call: (433) [user] count_lines_in_stream(2000, (0x55aefe498890), 189, _5680)
^  Unify: (433) [user] count_lines_in_stream(2000, (0x55aefe498890), 189, _5680)
   Call: (434) [system] 189>=2000
^  Redo: (433) [user] count_lines_in_stream(2000, (0x55aefe498890), 189, _5680)
   Call: (434) [read_util] read_util:read_line_to_codes((0x55aefe498890), _266136)
   Exit: (434) [read_util] read_util:read_line_to_codes((0x55aefe498890), |        (eval (if-decons-e ... |)
   Call: (434) [system] |        (eval (if-decons-e ... |==end_of_file
^  Redo: (433) [user] count_lines_in_stream(2000, (0x55aefe498890), 189, _5680)
   Call: (434) [system] _270182 is 189+1
   Exit: (434) [system] 190 is 189+1
^  Call: (434) [user] count_lines_in_stream(2000, (0x55aefe498890), 190, _5680)
^  Unify: (434) [user] count_lines_in_stream(2000, (0x55aefe498890), 190, _5680)
   Call: (435) [system] 190>=2000
^  Redo: (434) [user] count_lines_in_stream(2000, (0x55aefe498890), 190, _5680)
   Call: (435) [read_util] read_util:read_line_to_codes((0x55aefe498890), _275776)
   Exit: (435) [read_util] read_util:read_line_to_codes((0x55aefe498890), |          (chain (eval (in ... |)
   Call: (435) [system] |          (chain (eval (in ... |==end_of_file
^  Redo: (434) [user] count_lines_in_stream(2000, (0x55aefe498890), 190, _5680)
   Call: (435) [system] _280068 is 190+1
   Exit: (435) [system] 191 is 190+1
^  Call: (435) [user] count_lines_in_stream(2000, (0x55aefe498890), 191, _5680)
^  Unify: (435) [user] count_lines_in_stream(2000, (0x55aefe498890), 191, _5680)
   Call: (436) [system] 191>=2000
^  Redo: (435) [user] count_lines_in_stream(2000, (0x55aefe498890), 191, _5680)
   Call: (436) [read_util] read_util:read_line_to_codes((0x55aefe498890), _285662)
   Exit: (436) [read_util] read_util:read_line_to_codes((0x55aefe498890), |            (eval (return- ... |)
   Call: (436) [system] |            (eval (return- ... |==end_of_file
^  Redo: (435) [user] count_lines_in_stream(2000, (0x55aefe498890), 191, _5680)
   Call: (436) [system] _289678 is 191+1
   Exit: (436) [system] 192 is 191+1
^  Call: (436) [user] count_lines_in_stream(2000, (0x55aefe498890), 192, _5680)
^  Unify: (436) [user] count_lines_in_stream(2000, (0x55aefe498890), 192, _5680)
   Call: (437) [system] 192>=2000
^  Redo: (436) [user] count_lines_in_stream(2000, (0x55aefe498890), 192, _5680)
   Call: (437) [read_util] read_util:read_line_to_codes((0x55aefe498890), _295272)
   Exit: (437) [read_util] read_util:read_line_to_codes((0x55aefe498890), |              (chain (cons ... |)
   Call: (437) [system] |              (chain (cons ... |==end_of_file
^  Redo: (436) [user] count_lines_in_stream(2000, (0x55aefe498890), 192, _5680)
   Call: (437) [system] _299462 is 192+1
   Exit: (437) [system] 193 is 192+1
^  Call: (437) [user] count_lines_in_stream(2000, (0x55aefe498890), 193, _5680)
^  Unify: (437) [user] count_lines_in_stream(2000, (0x55aefe498890), 193, _5680)
   Call: (438) [system] 193>=2000
^  Redo: (437) [user] count_lines_in_stream(2000, (0x55aefe498890), 193, _5680)
   Call: (438) [read_util] read_util:read_line_to_codes((0x55aefe498890), _305056)
   Exit: (438) [read_util] read_util:read_line_to_codes((0x55aefe498890), |          (return (Error $ ... |)
   Call: (438) [system] |          (return (Error $ ... |==end_of_file
^  Redo: (437) [user] count_lines_in_stream(2000, (0x55aefe498890), 193, _5680)
   Call: (438) [system] _309162 is 193+1
   Exit: (438) [system] 194 is 193+1
^  Call: (438) [user] count_lines_in_stream(2000, (0x55aefe498890), 194, _5680)
^  Unify: (438) [user] count_lines_in_stream(2000, (0x55aefe498890), 194, _5680)
   Call: (439) [system] 194>=2000
^  Redo: (438) [user] count_lines_in_stream(2000, (0x55aefe498890), 194, _5680)
   Call: (439) [read_util] read_util:read_line_to_codes((0x55aefe498890), _314756)
   Exit: (439) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (return (Error $expr " ... |)
   Call: (439) [system] |    (return (Error $expr " ... |==end_of_file
^  Redo: (438) [user] count_lines_in_stream(2000, (0x55aefe498890), 194, _5680)
   Call: (439) [system] _318910 is 194+1
   Exit: (439) [system] 195 is 194+1
^  Call: (439) [user] count_lines_in_stream(2000, (0x55aefe498890), 195, _5680)
^  Unify: (439) [user] count_lines_in_stream(2000, (0x55aefe498890), 195, _5680)
   Call: (440) [system] 195>=2000
^  Redo: (439) [user] count_lines_in_stream(2000, (0x55aefe498890), 195, _5680)
   Call: (440) [read_util] read_util:read_line_to_codes((0x55aefe498890), _324504)
   Exit: (440) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (440) [system] []==end_of_file
^  Redo: (439) [user] count_lines_in_stream(2000, (0x55aefe498890), 195, _5680)
   Call: (440) [system] _328232 is 195+1
   Exit: (440) [system] 196 is 195+1
^  Call: (440) [user] count_lines_in_stream(2000, (0x55aefe498890), 196, _5680)
^  Unify: (440) [user] count_lines_in_stream(2000, (0x55aefe498890), 196, _5680)
   Call: (441) [system] 196>=2000
^  Redo: (440) [user] count_lines_in_stream(2000, (0x55aefe498890), 196, _5680)
   Call: (441) [read_util] read_util:read_line_to_codes((0x55aefe498890), _333826)
   Exit: (441) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(= (interpret-args $atom $ ... |)
   Call: (441) [system] |(= (interpret-args $atom $ ... |==end_of_file
^  Redo: (440) [user] count_lines_in_stream(2000, (0x55aefe498890), 196, _5680)
   Call: (441) [system] _337908 is 196+1
   Exit: (441) [system] 197 is 196+1
^  Call: (441) [user] count_lines_in_stream(2000, (0x55aefe498890), 197, _5680)
^  Unify: (441) [user] count_lines_in_stream(2000, (0x55aefe498890), 197, _5680)
   Call: (442) [system] 197>=2000
^  Redo: (441) [user] count_lines_in_stream(2000, (0x55aefe498890), 197, _5680)
   Call: (442) [read_util] read_util:read_line_to_codes((0x55aefe498890), _343502)
   Exit: (442) [read_util] read_util:read_line_to_codes((0x55aefe498890), `  (function (unify $args ()`)
   Call: (442) [system] `  (function (unify $args ()`==end_of_file
^  Redo: (441) [user] count_lines_in_stream(2000, (0x55aefe498890), 197, _5680)
   Call: (442) [system] _347392 is 197+1
   Exit: (442) [system] 198 is 197+1
^  Call: (442) [user] count_lines_in_stream(2000, (0x55aefe498890), 198, _5680)
^  Unify: (442) [user] count_lines_in_stream(2000, (0x55aefe498890), 198, _5680)
   Call: (443) [system] 198>=2000
^  Redo: (442) [user] count_lines_in_stream(2000, (0x55aefe498890), 198, _5680)
   Call: (443) [read_util] read_util:read_line_to_codes((0x55aefe498890), _352986)
   Exit: (443) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (eval (if-decons-expr  ... |)
   Call: (443) [system] |    (eval (if-decons-expr  ... |==end_of_file
^  Redo: (442) [user] count_lines_in_stream(2000, (0x55aefe498890), 198, _5680)
   Call: (443) [system] _357074 is 198+1
   Exit: (443) [system] 199 is 198+1
^  Call: (443) [user] count_lines_in_stream(2000, (0x55aefe498890), 199, _5680)
^  Unify: (443) [user] count_lines_in_stream(2000, (0x55aefe498890), 199, _5680)
   Call: (444) [system] 199>=2000
^  Redo: (443) [user] count_lines_in_stream(2000, (0x55aefe498890), 199, _5680)
   Call: (444) [read_util] read_util:read_line_to_codes((0x55aefe498890), _362668)
   Exit: (444) [read_util] read_util:read_line_to_codes((0x55aefe498890), |      (eval (match-types $ ... |)
   Call: (444) [system] |      (eval (match-types $ ... |==end_of_file
^  Redo: (443) [user] count_lines_in_stream(2000, (0x55aefe498890), 199, _5680)
   Call: (444) [system] _366702 is 199+1
   Exit: (444) [system] 200 is 199+1
^  Call: (444) [user] count_lines_in_stream(2000, (0x55aefe498890), 200, _5680)
^  Unify: (444) [user] count_lines_in_stream(2000, (0x55aefe498890), 200, _5680)
   Call: (445) [system] 200>=2000
^  Redo: (444) [user] count_lines_in_stream(2000, (0x55aefe498890), 200, _5680)
   Call: (445) [read_util] read_util:read_line_to_codes((0x55aefe498890), _372296)
   Exit: (445) [read_util] read_util:read_line_to_codes((0x55aefe498890), `        (return ())`)
   Call: (445) [system] `        (return ())`==end_of_file
^  Redo: (444) [user] count_lines_in_stream(2000, (0x55aefe498890), 200, _5680)
   Call: (445) [system] _376138 is 200+1
   Exit: (445) [system] 201 is 200+1
^  Call: (445) [user] count_lines_in_stream(2000, (0x55aefe498890), 201, _5680)
^  Unify: (445) [user] count_lines_in_stream(2000, (0x55aefe498890), 201, _5680)
   Call: (446) [system] 201>=2000
^  Redo: (445) [user] count_lines_in_stream(2000, (0x55aefe498890), 201, _5680)
   Call: (446) [read_util] read_util:read_line_to_codes((0x55aefe498890), _381732)
   Exit: (446) [read_util] read_util:read_line_to_codes((0x55aefe498890), |        (return (Error $at ... |)
   Call: (446) [system] |        (return (Error $at ... |==end_of_file
^  Redo: (445) [user] count_lines_in_stream(2000, (0x55aefe498890), 201, _5680)
   Call: (446) [system] _385706 is 201+1
   Exit: (446) [system] 202 is 201+1
^  Call: (446) [user] count_lines_in_stream(2000, (0x55aefe498890), 202, _5680)
^  Unify: (446) [user] count_lines_in_stream(2000, (0x55aefe498890), 202, _5680)
   Call: (447) [system] 202>=2000
^  Redo: (446) [user] count_lines_in_stream(2000, (0x55aefe498890), 202, _5680)
   Call: (447) [read_util] read_util:read_line_to_codes((0x55aefe498890), _391300)
   Exit: (447) [read_util] read_util:read_line_to_codes((0x55aefe498890), |      ;; (return (Error $a ... |)
   Call: (447) [system] |      ;; (return (Error $a ... |==end_of_file
^  Redo: (446) [user] count_lines_in_stream(2000, (0x55aefe498890), 202, _5680)
   Call: (447) [system] _395340 is 202+1
   Exit: (447) [system] 203 is 202+1
^  Call: (447) [user] count_lines_in_stream(2000, (0x55aefe498890), 203, _5680)
^  Unify: (447) [user] count_lines_in_stream(2000, (0x55aefe498890), 203, _5680)
   Call: (448) [system] 203>=2000
^  Redo: (447) [user] count_lines_in_stream(2000, (0x55aefe498890), 203, _5680)
   Call: (448) [read_util] read_util:read_line_to_codes((0x55aefe498890), _400934)
   Exit: (448) [read_util] read_util:read_line_to_codes((0x55aefe498890), |      (return (Error (inte ... |)
   Call: (448) [system] |      (return (Error (inte ... |==end_of_file
^  Redo: (447) [user] count_lines_in_stream(2000, (0x55aefe498890), 203, _5680)
   Call: (448) [system] _405544 is 203+1
   Exit: (448) [system] 204 is 203+1
^  Call: (448) [user] count_lines_in_stream(2000, (0x55aefe498890), 204, _5680)
^  Unify: (448) [user] count_lines_in_stream(2000, (0x55aefe498890), 204, _5680)
   Call: (449) [system] 204>=2000
^  Redo: (448) [user] count_lines_in_stream(2000, (0x55aefe498890), 204, _5680)
   Call: (449) [read_util] read_util:read_line_to_codes((0x55aefe498890), _411138)
   Exit: (449) [read_util] read_util:read_line_to_codes((0x55aefe498890), `      ))`)
   Call: (449) [system] `      ))`==end_of_file
^  Redo: (448) [user] count_lines_in_stream(2000, (0x55aefe498890), 204, _5680)
   Call: (449) [system] _414914 is 204+1
   Exit: (449) [system] 205 is 204+1
^  Call: (449) [user] count_lines_in_stream(2000, (0x55aefe498890), 205, _5680)
^  Unify: (449) [user] count_lines_in_stream(2000, (0x55aefe498890), 205, _5680)
   Call: (450) [system] 205>=2000
^  Redo: (449) [user] count_lines_in_stream(2000, (0x55aefe498890), 205, _5680)
   Call: (450) [read_util] read_util:read_line_to_codes((0x55aefe498890), _420508)
   Exit: (450) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (eval (if-decons-expr  ... |)
   Call: (450) [system] |    (eval (if-decons-expr  ... |==end_of_file
^  Redo: (449) [user] count_lines_in_stream(2000, (0x55aefe498890), 205, _5680)
   Call: (450) [system] _424494 is 205+1
   Exit: (450) [system] 206 is 205+1
^  Call: (450) [user] count_lines_in_stream(2000, (0x55aefe498890), 206, _5680)
^  Unify: (450) [user] count_lines_in_stream(2000, (0x55aefe498890), 206, _5680)
   Call: (451) [system] 206>=2000
^  Redo: (450) [user] count_lines_in_stream(2000, (0x55aefe498890), 206, _5680)
   Call: (451) [read_util] read_util:read_line_to_codes((0x55aefe498890), _430088)
   Exit: (451) [read_util] read_util:read_line_to_codes((0x55aefe498890), |      (eval (if-decons-exp ... |)
   Call: (451) [system] |      (eval (if-decons-exp ... |==end_of_file
^  Redo: (450) [user] count_lines_in_stream(2000, (0x55aefe498890), 206, _5680)
   Call: (451) [system] _434182 is 206+1
   Exit: (451) [system] 207 is 206+1
^  Call: (451) [user] count_lines_in_stream(2000, (0x55aefe498890), 207, _5680)
^  Unify: (451) [user] count_lines_in_stream(2000, (0x55aefe498890), 207, _5680)
   Call: (452) [system] 207>=2000
^  Redo: (451) [user] count_lines_in_stream(2000, (0x55aefe498890), 207, _5680)
   Call: (452) [read_util] read_util:read_line_to_codes((0x55aefe498890), _439776)
   Exit: (452) [read_util] read_util:read_line_to_codes((0x55aefe498890), |        (chain (eval (inte ... |)
   Call: (452) [system] |        (chain (eval (inte ... |==end_of_file
^  Redo: (451) [user] count_lines_in_stream(2000, (0x55aefe498890), 207, _5680)
   Call: (452) [system] _443930 is 207+1
   Exit: (452) [system] 208 is 207+1
^  Call: (452) [user] count_lines_in_stream(2000, (0x55aefe498890), 208, _5680)
^  Unify: (452) [user] count_lines_in_stream(2000, (0x55aefe498890), 208, _5680)
   Call: (453) [system] 208>=2000
^  Redo: (452) [user] count_lines_in_stream(2000, (0x55aefe498890), 208, _5680)
   Call: (453) [read_util] read_util:read_line_to_codes((0x55aefe498890), _449524)
   Exit: (453) [read_util] read_util:read_line_to_codes((0x55aefe498890), |          ; check that hea ... |)
   Call: (453) [system] |          ; check that hea ... |==end_of_file
^  Redo: (452) [user] count_lines_in_stream(2000, (0x55aefe498890), 208, _5680)
   Call: (453) [system] _453708 is 208+1
   Exit: (453) [system] 209 is 208+1
^  Call: (453) [user] count_lines_in_stream(2000, (0x55aefe498890), 209, _5680)
^  Unify: (453) [user] count_lines_in_stream(2000, (0x55aefe498890), 209, _5680)
   Call: (454) [system] 209>=2000
^  Redo: (453) [user] count_lines_in_stream(2000, (0x55aefe498890), 209, _5680)
   Call: (454) [read_util] read_util:read_line_to_codes((0x55aefe498890), _459302)
   Exit: (454) [read_util] read_util:read_line_to_codes((0x55aefe498890), |          ; can be just an ... |)
   Call: (454) [system] |          ; can be just an ... |==end_of_file
^  Redo: (453) [user] count_lines_in_stream(2000, (0x55aefe498890), 209, _5680)
   Call: (454) [system] _463414 is 209+1
   Exit: (454) [system] 210 is 209+1
^  Call: (454) [user] count_lines_in_stream(2000, (0x55aefe498890), 210, _5680)
^  Unify: (454) [user] count_lines_in_stream(2000, (0x55aefe498890), 210, _5680)
   Call: (455) [system] 210>=2000
^  Redo: (454) [user] count_lines_in_stream(2000, (0x55aefe498890), 210, _5680)
   Call: (455) [read_util] read_util:read_line_to_codes((0x55aefe498890), _469008)
   Exit: (455) [read_util] read_util:read_line_to_codes((0x55aefe498890), |          (eval (if-equal  ... |)
   Call: (455) [system] |          (eval (if-equal  ... |==end_of_file
^  Redo: (454) [user] count_lines_in_stream(2000, (0x55aefe498890), 210, _5680)
   Call: (455) [system] _473006 is 210+1
   Exit: (455) [system] 211 is 210+1
^  Call: (455) [user] count_lines_in_stream(2000, (0x55aefe498890), 211, _5680)
^  Unify: (455) [user] count_lines_in_stream(2000, (0x55aefe498890), 211, _5680)
   Call: (456) [system] 211>=2000
^  Redo: (455) [user] count_lines_in_stream(2000, (0x55aefe498890), 211, _5680)
   Call: (456) [read_util] read_util:read_line_to_codes((0x55aefe498890), _478600)
   Exit: (456) [read_util] read_util:read_line_to_codes((0x55aefe498890), |            (chain (eval ( ... |)
   Call: (456) [system] |            (chain (eval ( ... |==end_of_file
^  Redo: (455) [user] count_lines_in_stream(2000, (0x55aefe498890), 211, _5680)
   Call: (456) [system] _483060 is 211+1
   Exit: (456) [system] 212 is 211+1
^  Call: (456) [user] count_lines_in_stream(2000, (0x55aefe498890), 212, _5680)
^  Unify: (456) [user] count_lines_in_stream(2000, (0x55aefe498890), 212, _5680)
   Call: (457) [system] 212>=2000
^  Redo: (456) [user] count_lines_in_stream(2000, (0x55aefe498890), 212, _5680)
   Call: (457) [read_util] read_util:read_line_to_codes((0x55aefe498890), _488654)
   Exit: (457) [read_util] read_util:read_line_to_codes((0x55aefe498890), |            (eval (return- ... |)
   Call: (457) [system] |            (eval (return- ... |==end_of_file
^  Redo: (456) [user] count_lines_in_stream(2000, (0x55aefe498890), 212, _5680)
   Call: (457) [system] _492670 is 212+1
   Exit: (457) [system] 213 is 212+1
^  Call: (457) [user] count_lines_in_stream(2000, (0x55aefe498890), 213, _5680)
^  Unify: (457) [user] count_lines_in_stream(2000, (0x55aefe498890), 213, _5680)
   Call: (458) [system] 213>=2000
^  Redo: (457) [user] count_lines_in_stream(2000, (0x55aefe498890), 213, _5680)
   Call: (458) [read_util] read_util:read_line_to_codes((0x55aefe498890), _498264)
   Exit: (458) [read_util] read_util:read_line_to_codes((0x55aefe498890), |              (chain (eval ... |)
   Call: (458) [system] |              (chain (eval ... |==end_of_file
^  Redo: (457) [user] count_lines_in_stream(2000, (0x55aefe498890), 213, _5680)
   Call: (458) [system] _502772 is 213+1
   Exit: (458) [system] 214 is 213+1
^  Call: (458) [user] count_lines_in_stream(2000, (0x55aefe498890), 214, _5680)
^  Unify: (458) [user] count_lines_in_stream(2000, (0x55aefe498890), 214, _5680)
   Call: (459) [system] 214>=2000
^  Redo: (458) [user] count_lines_in_stream(2000, (0x55aefe498890), 214, _5680)
   Call: (459) [read_util] read_util:read_line_to_codes((0x55aefe498890), _508366)
   Exit: (459) [read_util] read_util:read_line_to_codes((0x55aefe498890), |        (return (Error $at ... |)
   Call: (459) [system] |        (return (Error $at ... |==end_of_file
^  Redo: (458) [user] count_lines_in_stream(2000, (0x55aefe498890), 214, _5680)
   Call: (459) [system] _512340 is 214+1
   Exit: (459) [system] 215 is 214+1
^  Call: (459) [user] count_lines_in_stream(2000, (0x55aefe498890), 215, _5680)
^  Unify: (459) [user] count_lines_in_stream(2000, (0x55aefe498890), 215, _5680)
   Call: (460) [system] 215>=2000
^  Redo: (459) [user] count_lines_in_stream(2000, (0x55aefe498890), 215, _5680)
   Call: (460) [read_util] read_util:read_line_to_codes((0x55aefe498890), _517934)
   Exit: (460) [read_util] read_util:read_line_to_codes((0x55aefe498890), |      (return (Error (inte ... |)
   Call: (460) [system] |      (return (Error (inte ... |==end_of_file
^  Redo: (459) [user] count_lines_in_stream(2000, (0x55aefe498890), 215, _5680)
   Call: (460) [system] _522352 is 215+1
   Exit: (460) [system] 216 is 215+1
^  Call: (460) [user] count_lines_in_stream(2000, (0x55aefe498890), 216, _5680)
^  Unify: (460) [user] count_lines_in_stream(2000, (0x55aefe498890), 216, _5680)
   Call: (461) [system] 216>=2000
^  Redo: (460) [user] count_lines_in_stream(2000, (0x55aefe498890), 216, _5680)
   Call: (461) [read_util] read_util:read_line_to_codes((0x55aefe498890), _64322)
   Exit: (461) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (461) [system] []==end_of_file
^  Redo: (460) [user] count_lines_in_stream(2000, (0x55aefe498890), 216, _5680)
   Call: (461) [system] _68050 is 216+1
   Exit: (461) [system] 217 is 216+1
^  Call: (461) [user] count_lines_in_stream(2000, (0x55aefe498890), 217, _5680)
^  Unify: (461) [user] count_lines_in_stream(2000, (0x55aefe498890), 217, _5680)
   Call: (462) [system] 217>=2000
^  Redo: (461) [user] count_lines_in_stream(2000, (0x55aefe498890), 217, _5680)
   Call: (462) [read_util] read_util:read_line_to_codes((0x55aefe498890), _73644)
   Exit: (462) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(= (interpret-args-tail $a ... |)
   Call: (462) [system] |(= (interpret-args-tail $a ... |==end_of_file
^  Redo: (461) [user] count_lines_in_stream(2000, (0x55aefe498890), 217, _5680)
   Call: (462) [system] _77858 is 217+1
   Exit: (462) [system] 218 is 217+1
^  Call: (462) [user] count_lines_in_stream(2000, (0x55aefe498890), 218, _5680)
^  Unify: (462) [user] count_lines_in_stream(2000, (0x55aefe498890), 218, _5680)
   Call: (463) [system] 218>=2000
^  Redo: (462) [user] count_lines_in_stream(2000, (0x55aefe498890), 218, _5680)
   Call: (463) [read_util] read_util:read_line_to_codes((0x55aefe498890), _83452)
   Exit: (463) [read_util] read_util:read_line_to_codes((0x55aefe498890), |  (function (chain (eval ( ... |)
   Call: (463) [system] |  (function (chain (eval ( ... |==end_of_file
^  Redo: (462) [user] count_lines_in_stream(2000, (0x55aefe498890), 218, _5680)
   Call: (463) [system] _87822 is 218+1
   Exit: (463) [system] 219 is 218+1
^  Call: (463) [user] count_lines_in_stream(2000, (0x55aefe498890), 219, _5680)
^  Unify: (463) [user] count_lines_in_stream(2000, (0x55aefe498890), 219, _5680)
   Call: (464) [system] 219>=2000
^  Redo: (463) [user] count_lines_in_stream(2000, (0x55aefe498890), 219, _5680)
   Call: (464) [read_util] read_util:read_line_to_codes((0x55aefe498890), _93416)
   Exit: (464) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (eval (return-on-error ... |)
   Call: (464) [system] |    (eval (return-on-error ... |==end_of_file
^  Redo: (463) [user] count_lines_in_stream(2000, (0x55aefe498890), 219, _5680)
   Call: (464) [system] _97384 is 219+1
   Exit: (464) [system] 220 is 219+1
^  Call: (464) [user] count_lines_in_stream(2000, (0x55aefe498890), 220, _5680)
^  Unify: (464) [user] count_lines_in_stream(2000, (0x55aefe498890), 220, _5680)
   Call: (465) [system] 220>=2000
^  Redo: (464) [user] count_lines_in_stream(2000, (0x55aefe498890), 220, _5680)
   Call: (465) [read_util] read_util:read_line_to_codes((0x55aefe498890), _102978)
   Exit: (465) [read_util] read_util:read_line_to_codes((0x55aefe498890), |      (chain (cons-atom $h ... |)
   Call: (465) [system] |      (chain (cons-atom $h ... |==end_of_file
^  Redo: (464) [user] count_lines_in_stream(2000, (0x55aefe498890), 220, _5680)
   Call: (465) [system] _107126 is 220+1
   Exit: (465) [system] 221 is 220+1
^  Call: (465) [user] count_lines_in_stream(2000, (0x55aefe498890), 221, _5680)
^  Unify: (465) [user] count_lines_in_stream(2000, (0x55aefe498890), 221, _5680)
   Call: (466) [system] 221>=2000
^  Redo: (465) [user] count_lines_in_stream(2000, (0x55aefe498890), 221, _5680)
   Call: (466) [read_util] read_util:read_line_to_codes((0x55aefe498890), _112720)
   Exit: (466) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (466) [system] []==end_of_file
^  Redo: (465) [user] count_lines_in_stream(2000, (0x55aefe498890), 221, _5680)
   Call: (466) [system] _116448 is 221+1
   Exit: (466) [system] 222 is 221+1
^  Call: (466) [user] count_lines_in_stream(2000, (0x55aefe498890), 222, _5680)
^  Unify: (466) [user] count_lines_in_stream(2000, (0x55aefe498890), 222, _5680)
   Call: (467) [system] 222>=2000
^  Redo: (466) [user] count_lines_in_stream(2000, (0x55aefe498890), 222, _5680)
   Call: (467) [read_util] read_util:read_line_to_codes((0x55aefe498890), _122042)
   Exit: (467) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(= (interpret-tuple $atom  ... |)
   Call: (467) [system] |(= (interpret-tuple $atom  ... |==end_of_file
^  Redo: (466) [user] count_lines_in_stream(2000, (0x55aefe498890), 222, _5680)
   Call: (467) [system] _125968 is 222+1
   Exit: (467) [system] 223 is 222+1
^  Call: (467) [user] count_lines_in_stream(2000, (0x55aefe498890), 223, _5680)
^  Unify: (467) [user] count_lines_in_stream(2000, (0x55aefe498890), 223, _5680)
   Call: (468) [system] 223>=2000
^  Redo: (467) [user] count_lines_in_stream(2000, (0x55aefe498890), 223, _5680)
   Call: (468) [read_util] read_util:read_line_to_codes((0x55aefe498890), _131562)
   Exit: (468) [read_util] read_util:read_line_to_codes((0x55aefe498890), `  (function (unify $atom ()`)
   Call: (468) [system] `  (function (unify $atom ()`==end_of_file
^  Redo: (467) [user] count_lines_in_stream(2000, (0x55aefe498890), 223, _5680)
   Call: (468) [system] _135452 is 223+1
   Exit: (468) [system] 224 is 223+1
^  Call: (468) [user] count_lines_in_stream(2000, (0x55aefe498890), 224, _5680)
^  Unify: (468) [user] count_lines_in_stream(2000, (0x55aefe498890), 224, _5680)
   Call: (469) [system] 224>=2000
^  Redo: (468) [user] count_lines_in_stream(2000, (0x55aefe498890), 224, _5680)
   Call: (469) [read_util] read_util:read_line_to_codes((0x55aefe498890), _141046)
   Exit: (469) [read_util] read_util:read_line_to_codes((0x55aefe498890), `    (return $atom)`)
   Call: (469) [system] `    (return $atom)`==end_of_file
^  Redo: (468) [user] count_lines_in_stream(2000, (0x55aefe498890), 224, _5680)
   Call: (469) [system] _144882 is 224+1
   Exit: (469) [system] 225 is 224+1
^  Call: (469) [user] count_lines_in_stream(2000, (0x55aefe498890), 225, _5680)
^  Unify: (469) [user] count_lines_in_stream(2000, (0x55aefe498890), 225, _5680)
   Call: (470) [system] 225>=2000
^  Redo: (469) [user] count_lines_in_stream(2000, (0x55aefe498890), 225, _5680)
   Call: (470) [read_util] read_util:read_line_to_codes((0x55aefe498890), _150476)
   Exit: (470) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (eval (if-decons-expr  ... |)
   Call: (470) [system] |    (eval (if-decons-expr  ... |==end_of_file
^  Redo: (469) [user] count_lines_in_stream(2000, (0x55aefe498890), 225, _5680)
   Call: (470) [system] _154462 is 225+1
   Exit: (470) [system] 226 is 225+1
^  Call: (470) [user] count_lines_in_stream(2000, (0x55aefe498890), 226, _5680)
^  Unify: (470) [user] count_lines_in_stream(2000, (0x55aefe498890), 226, _5680)
   Call: (471) [system] 226>=2000
^  Redo: (470) [user] count_lines_in_stream(2000, (0x55aefe498890), 226, _5680)
   Call: (471) [read_util] read_util:read_line_to_codes((0x55aefe498890), _160056)
   Exit: (471) [read_util] read_util:read_line_to_codes((0x55aefe498890), |      (chain (eval (interp ... |)
   Call: (471) [system] |      (chain (eval (interp ... |==end_of_file
^  Redo: (470) [user] count_lines_in_stream(2000, (0x55aefe498890), 226, _5680)
   Call: (471) [system] _164162 is 226+1
   Exit: (471) [system] 227 is 226+1
^  Call: (471) [user] count_lines_in_stream(2000, (0x55aefe498890), 227, _5680)
^  Unify: (471) [user] count_lines_in_stream(2000, (0x55aefe498890), 227, _5680)
   Call: (472) [system] 227>=2000
^  Redo: (471) [user] count_lines_in_stream(2000, (0x55aefe498890), 227, _5680)
   Call: (472) [read_util] read_util:read_line_to_codes((0x55aefe498890), _169756)
   Exit: (472) [read_util] read_util:read_line_to_codes((0x55aefe498890), |        (eval (if-equal $r ... |)
   Call: (472) [system] |        (eval (if-equal $r ... |==end_of_file
^  Redo: (471) [user] count_lines_in_stream(2000, (0x55aefe498890), 227, _5680)
   Call: (472) [system] _173790 is 227+1
   Exit: (472) [system] 228 is 227+1
^  Call: (472) [user] count_lines_in_stream(2000, (0x55aefe498890), 228, _5680)
^  Unify: (472) [user] count_lines_in_stream(2000, (0x55aefe498890), 228, _5680)
   Call: (473) [system] 228>=2000
^  Redo: (472) [user] count_lines_in_stream(2000, (0x55aefe498890), 228, _5680)
   Call: (473) [read_util] read_util:read_line_to_codes((0x55aefe498890), _179384)
   Exit: (473) [read_util] read_util:read_line_to_codes((0x55aefe498890), |          (chain (eval (in ... |)
   Call: (473) [system] |          (chain (eval (in ... |==end_of_file
^  Redo: (472) [user] count_lines_in_stream(2000, (0x55aefe498890), 228, _5680)
   Call: (473) [system] _183478 is 228+1
   Exit: (473) [system] 229 is 228+1
^  Call: (473) [user] count_lines_in_stream(2000, (0x55aefe498890), 229, _5680)
^  Unify: (473) [user] count_lines_in_stream(2000, (0x55aefe498890), 229, _5680)
   Call: (474) [system] 229>=2000
^  Redo: (473) [user] count_lines_in_stream(2000, (0x55aefe498890), 229, _5680)
   Call: (474) [read_util] read_util:read_line_to_codes((0x55aefe498890), _189072)
   Exit: (474) [read_util] read_util:read_line_to_codes((0x55aefe498890), |            (eval (if-equa ... |)
   Call: (474) [system] |            (eval (if-equa ... |==end_of_file
^  Redo: (473) [user] count_lines_in_stream(2000, (0x55aefe498890), 229, _5680)
   Call: (474) [system] _193130 is 229+1
   Exit: (474) [system] 230 is 229+1
^  Call: (474) [user] count_lines_in_stream(2000, (0x55aefe498890), 230, _5680)
^  Unify: (474) [user] count_lines_in_stream(2000, (0x55aefe498890), 230, _5680)
   Call: (475) [system] 230>=2000
^  Redo: (474) [user] count_lines_in_stream(2000, (0x55aefe498890), 230, _5680)
   Call: (475) [read_util] read_util:read_line_to_codes((0x55aefe498890), _198724)
   Exit: (475) [read_util] read_util:read_line_to_codes((0x55aefe498890), |              (chain (cons ... |)
   Call: (475) [system] |              (chain (cons ... |==end_of_file
^  Redo: (474) [user] count_lines_in_stream(2000, (0x55aefe498890), 230, _5680)
   Call: (475) [system] _202890 is 230+1
   Exit: (475) [system] 231 is 230+1
^  Call: (475) [user] count_lines_in_stream(2000, (0x55aefe498890), 231, _5680)
^  Unify: (475) [user] count_lines_in_stream(2000, (0x55aefe498890), 231, _5680)
   Call: (476) [system] 231>=2000
^  Redo: (475) [user] count_lines_in_stream(2000, (0x55aefe498890), 231, _5680)
   Call: (476) [read_util] read_util:read_line_to_codes((0x55aefe498890), _208484)
   Exit: (476) [read_util] read_util:read_line_to_codes((0x55aefe498890), |      (return (Error (inte ... |)
   Call: (476) [system] |      (return (Error (inte ... |==end_of_file
^  Redo: (475) [user] count_lines_in_stream(2000, (0x55aefe498890), 231, _5680)
   Call: (476) [system] _212896 is 231+1
   Exit: (476) [system] 232 is 231+1
^  Call: (476) [user] count_lines_in_stream(2000, (0x55aefe498890), 232, _5680)
^  Unify: (476) [user] count_lines_in_stream(2000, (0x55aefe498890), 232, _5680)
   Call: (477) [system] 232>=2000
^  Redo: (476) [user] count_lines_in_stream(2000, (0x55aefe498890), 232, _5680)
   Call: (477) [read_util] read_util:read_line_to_codes((0x55aefe498890), _218490)
   Exit: (477) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (477) [system] []==end_of_file
^  Redo: (476) [user] count_lines_in_stream(2000, (0x55aefe498890), 232, _5680)
   Call: (477) [system] _222218 is 232+1
   Exit: (477) [system] 233 is 232+1
^  Call: (477) [user] count_lines_in_stream(2000, (0x55aefe498890), 233, _5680)
^  Unify: (477) [user] count_lines_in_stream(2000, (0x55aefe498890), 233, _5680)
   Call: (478) [system] 233>=2000
^  Redo: (477) [user] count_lines_in_stream(2000, (0x55aefe498890), 233, _5680)
   Call: (478) [read_util] read_util:read_line_to_codes((0x55aefe498890), _227812)
   Exit: (478) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(= (metta-call $atom $type ... |)
   Call: (478) [system] |(= (metta-call $atom $type ... |==end_of_file
^  Redo: (477) [user] count_lines_in_stream(2000, (0x55aefe498890), 233, _5680)
   Call: (478) [system] _231744 is 233+1
   Exit: (478) [system] 234 is 233+1
^  Call: (478) [user] count_lines_in_stream(2000, (0x55aefe498890), 234, _5680)
^  Unify: (478) [user] count_lines_in_stream(2000, (0x55aefe498890), 234, _5680)
   Call: (479) [system] 234>=2000
^  Redo: (478) [user] count_lines_in_stream(2000, (0x55aefe498890), 234, _5680)
   Call: (479) [read_util] read_util:read_line_to_codes((0x55aefe498890), _237338)
   Exit: (479) [read_util] read_util:read_line_to_codes((0x55aefe498890), |  (function (eval (if-erro ... |)
   Call: (479) [system] |  (function (eval (if-erro ... |==end_of_file
^  Redo: (478) [user] count_lines_in_stream(2000, (0x55aefe498890), 234, _5680)
   Call: (479) [system] _241354 is 234+1
   Exit: (479) [system] 235 is 234+1
^  Call: (479) [user] count_lines_in_stream(2000, (0x55aefe498890), 235, _5680)
^  Unify: (479) [user] count_lines_in_stream(2000, (0x55aefe498890), 235, _5680)
   Call: (480) [system] 235>=2000
^  Redo: (479) [user] count_lines_in_stream(2000, (0x55aefe498890), 235, _5680)
   Call: (480) [read_util] read_util:read_line_to_codes((0x55aefe498890), _246948)
   Exit: (480) [read_util] read_util:read_line_to_codes((0x55aefe498890), `    (chain (eval $atom) $result`)
   Call: (480) [system] `    (chain (eval $atom) $result`==end_of_file
^  Redo: (479) [user] count_lines_in_stream(2000, (0x55aefe498890), 235, _5680)
   Call: (480) [system] _250862 is 235+1
   Exit: (480) [system] 236 is 235+1
^  Call: (480) [user] count_lines_in_stream(2000, (0x55aefe498890), 236, _5680)
^  Unify: (480) [user] count_lines_in_stream(2000, (0x55aefe498890), 236, _5680)
   Call: (481) [system] 236>=2000
^  Redo: (480) [user] count_lines_in_stream(2000, (0x55aefe498890), 236, _5680)
   Call: (481) [read_util] read_util:read_line_to_codes((0x55aefe498890), _256456)
   Exit: (481) [read_util] read_util:read_line_to_codes((0x55aefe498890), |      (eval (if-equal $res ... |)
   Call: (481) [system] |      (eval (if-equal $res ... |==end_of_file
^  Redo: (480) [user] count_lines_in_stream(2000, (0x55aefe498890), 236, _5680)
   Call: (481) [system] _260526 is 236+1
   Exit: (481) [system] 237 is 236+1
^  Call: (481) [user] count_lines_in_stream(2000, (0x55aefe498890), 237, _5680)
^  Unify: (481) [user] count_lines_in_stream(2000, (0x55aefe498890), 237, _5680)
   Call: (482) [system] 237>=2000
^  Redo: (481) [user] count_lines_in_stream(2000, (0x55aefe498890), 237, _5680)
   Call: (482) [read_util] read_util:read_line_to_codes((0x55aefe498890), _266120)
   Exit: (482) [read_util] read_util:read_line_to_codes((0x55aefe498890), |        (eval (if-equal $r ... |)
   Call: (482) [system] |        (eval (if-equal $r ... |==end_of_file
^  Redo: (481) [user] count_lines_in_stream(2000, (0x55aefe498890), 237, _5680)
   Call: (482) [system] _270160 is 237+1
   Exit: (482) [system] 238 is 237+1
^  Call: (482) [user] count_lines_in_stream(2000, (0x55aefe498890), 238, _5680)
^  Unify: (482) [user] count_lines_in_stream(2000, (0x55aefe498890), 238, _5680)
   Call: (483) [system] 238>=2000
^  Redo: (482) [user] count_lines_in_stream(2000, (0x55aefe498890), 238, _5680)
   Call: (483) [read_util] read_util:read_line_to_codes((0x55aefe498890), _275754)
   Exit: (483) [read_util] read_util:read_line_to_codes((0x55aefe498890), |          (eval (if-error  ... |)
   Call: (483) [system] |          (eval (if-error  ... |==end_of_file
^  Redo: (482) [user] count_lines_in_stream(2000, (0x55aefe498890), 238, _5680)
   Call: (483) [system] _279782 is 238+1
   Exit: (483) [system] 239 is 238+1
^  Call: (483) [user] count_lines_in_stream(2000, (0x55aefe498890), 239, _5680)
^  Unify: (483) [user] count_lines_in_stream(2000, (0x55aefe498890), 239, _5680)
   Call: (484) [system] 239>=2000
^  Redo: (483) [user] count_lines_in_stream(2000, (0x55aefe498890), 239, _5680)
   Call: (484) [read_util] read_util:read_line_to_codes((0x55aefe498890), _285376)
   Exit: (484) [read_util] read_util:read_line_to_codes((0x55aefe498890), |            (chain (eval ( ... |)
   Call: (484) [system] |            (chain (eval ( ... |==end_of_file
^  Redo: (483) [user] count_lines_in_stream(2000, (0x55aefe498890), 239, _5680)
   Call: (484) [system] _289644 is 239+1
   Exit: (484) [system] 240 is 239+1
^  Call: (484) [user] count_lines_in_stream(2000, (0x55aefe498890), 240, _5680)
^  Unify: (484) [user] count_lines_in_stream(2000, (0x55aefe498890), 240, _5680)
   Call: (485) [system] 240>=2000
^  Redo: (484) [user] count_lines_in_stream(2000, (0x55aefe498890), 240, _5680)
   Call: (485) [read_util] read_util:read_line_to_codes((0x55aefe498890), _295238)
   Exit: (485) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (485) [system] []==end_of_file
^  Redo: (484) [user] count_lines_in_stream(2000, (0x55aefe498890), 240, _5680)
   Call: (485) [system] _298966 is 240+1
   Exit: (485) [system] 241 is 240+1
^  Call: (485) [user] count_lines_in_stream(2000, (0x55aefe498890), 241, _5680)
^  Unify: (485) [user] count_lines_in_stream(2000, (0x55aefe498890), 241, _5680)
   Call: (486) [system] 241>=2000
^  Redo: (485) [user] count_lines_in_stream(2000, (0x55aefe498890), 241, _5680)
   Call: (486) [read_util] read_util:read_line_to_codes((0x55aefe498890), _304560)
   Exit: (486) [read_util] read_util:read_line_to_codes((0x55aefe498890), |;;;;;;;;;;;;;;;;;;;;;;;;;; ... |)
   Call: (486) [system] |;;;;;;;;;;;;;;;;;;;;;;;;;; ... |==end_of_file
^  Redo: (485) [user] count_lines_in_stream(2000, (0x55aefe498890), 241, _5680)
   Call: (486) [system] _308510 is 241+1
   Exit: (486) [system] 242 is 241+1
^  Call: (486) [user] count_lines_in_stream(2000, (0x55aefe498890), 242, _5680)
^  Unify: (486) [user] count_lines_in_stream(2000, (0x55aefe498890), 242, _5680)
   Call: (487) [system] 242>=2000
^  Redo: (486) [user] count_lines_in_stream(2000, (0x55aefe498890), 242, _5680)
   Call: (487) [read_util] read_util:read_line_to_codes((0x55aefe498890), _314104)
   Exit: (487) [read_util] read_util:read_line_to_codes((0x55aefe498890), |; Standard library written ... |)
   Call: (487) [system] |; Standard library written ... |==end_of_file
^  Redo: (486) [user] count_lines_in_stream(2000, (0x55aefe498890), 242, _5680)
   Call: (487) [system] _318054 is 242+1
   Exit: (487) [system] 243 is 242+1
^  Call: (487) [user] count_lines_in_stream(2000, (0x55aefe498890), 243, _5680)
^  Unify: (487) [user] count_lines_in_stream(2000, (0x55aefe498890), 243, _5680)
   Call: (488) [system] 243>=2000
^  Redo: (487) [user] count_lines_in_stream(2000, (0x55aefe498890), 243, _5680)
   Call: (488) [read_util] read_util:read_line_to_codes((0x55aefe498890), _323648)
   Exit: (488) [read_util] read_util:read_line_to_codes((0x55aefe498890), |;;;;;;;;;;;;;;;;;;;;;;;;;; ... |)
   Call: (488) [system] |;;;;;;;;;;;;;;;;;;;;;;;;;; ... |==end_of_file
^  Redo: (487) [user] count_lines_in_stream(2000, (0x55aefe498890), 243, _5680)
   Call: (488) [system] _327598 is 243+1
   Exit: (488) [system] 244 is 243+1
^  Call: (488) [user] count_lines_in_stream(2000, (0x55aefe498890), 244, _5680)
^  Unify: (488) [user] count_lines_in_stream(2000, (0x55aefe498890), 244, _5680)
   Call: (489) [system] 244>=2000
^  Redo: (488) [user] count_lines_in_stream(2000, (0x55aefe498890), 244, _5680)
   Call: (489) [read_util] read_util:read_line_to_codes((0x55aefe498890), _333192)
   Exit: (489) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (489) [system] []==end_of_file
^  Redo: (488) [user] count_lines_in_stream(2000, (0x55aefe498890), 244, _5680)
   Call: (489) [system] _336920 is 244+1
   Exit: (489) [system] 245 is 244+1
^  Call: (489) [user] count_lines_in_stream(2000, (0x55aefe498890), 245, _5680)
^  Unify: (489) [user] count_lines_in_stream(2000, (0x55aefe498890), 245, _5680)
   Call: (490) [system] 245>=2000
^  Redo: (489) [user] count_lines_in_stream(2000, (0x55aefe498890), 245, _5680)
   Call: (490) [read_util] read_util:read_line_to_codes((0x55aefe498890), _342514)
   Exit: (490) [read_util] read_util:read_line_to_codes((0x55aefe498890), |;`$then`, `$else` should b ... |)
   Call: (490) [system] |;`$then`, `$else` should b ... |==end_of_file
^  Redo: (489) [user] count_lines_in_stream(2000, (0x55aefe498890), 245, _5680)
   Call: (490) [system] _346614 is 245+1
   Exit: (490) [system] 246 is 245+1
^  Call: (490) [user] count_lines_in_stream(2000, (0x55aefe498890), 246, _5680)
^  Unify: (490) [user] count_lines_in_stream(2000, (0x55aefe498890), 246, _5680)
   Call: (491) [system] 246>=2000
^  Redo: (490) [user] count_lines_in_stream(2000, (0x55aefe498890), 246, _5680)
   Call: (491) [read_util] read_util:read_line_to_codes((0x55aefe498890), _352208)
   Exit: (491) [read_util] read_util:read_line_to_codes((0x55aefe498890), |; and infinite cycle in in ... |)
   Call: (491) [system] |; and infinite cycle in in ... |==end_of_file
^  Redo: (490) [user] count_lines_in_stream(2000, (0x55aefe498890), 246, _5680)
   Call: (491) [system] _356134 is 246+1
   Exit: (491) [system] 247 is 246+1
^  Call: (491) [user] count_lines_in_stream(2000, (0x55aefe498890), 247, _5680)
^  Unify: (491) [user] count_lines_in_stream(2000, (0x55aefe498890), 247, _5680)
   Call: (492) [system] 247>=2000
^  Redo: (491) [user] count_lines_in_stream(2000, (0x55aefe498890), 247, _5680)
   Call: (492) [read_util] read_util:read_line_to_codes((0x55aefe498890), _361728)
   Exit: (492) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(: if (-> Bool Atom Atom $t))`)
   Call: (492) [system] `(: if (-> Bool Atom Atom $t))`==end_of_file
^  Redo: (491) [user] count_lines_in_stream(2000, (0x55aefe498890), 247, _5680)
   Call: (492) [system] _365630 is 247+1
   Exit: (492) [system] 248 is 247+1
^  Call: (492) [user] count_lines_in_stream(2000, (0x55aefe498890), 248, _5680)
^  Unify: (492) [user] count_lines_in_stream(2000, (0x55aefe498890), 248, _5680)
   Call: (493) [system] 248>=2000
^  Redo: (492) [user] count_lines_in_stream(2000, (0x55aefe498890), 248, _5680)
   Call: (493) [read_util] read_util:read_line_to_codes((0x55aefe498890), _371224)
   Exit: (493) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (if True $then $else) $then)`)
   Call: (493) [system] `(= (if True $then $else) $then)`==end_of_file
^  Redo: (492) [user] count_lines_in_stream(2000, (0x55aefe498890), 248, _5680)
   Call: (493) [system] _375138 is 248+1
   Exit: (493) [system] 249 is 248+1
^  Call: (493) [user] count_lines_in_stream(2000, (0x55aefe498890), 249, _5680)
^  Unify: (493) [user] count_lines_in_stream(2000, (0x55aefe498890), 249, _5680)
   Call: (494) [system] 249>=2000
^  Redo: (493) [user] count_lines_in_stream(2000, (0x55aefe498890), 249, _5680)
   Call: (494) [read_util] read_util:read_line_to_codes((0x55aefe498890), _380732)
   Exit: (494) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(= (if False $then $else)  ... |)
   Call: (494) [system] |(= (if False $then $else)  ... |==end_of_file
^  Redo: (493) [user] count_lines_in_stream(2000, (0x55aefe498890), 249, _5680)
   Call: (494) [system] _384652 is 249+1
   Exit: (494) [system] 250 is 249+1
^  Call: (494) [user] count_lines_in_stream(2000, (0x55aefe498890), 250, _5680)
^  Unify: (494) [user] count_lines_in_stream(2000, (0x55aefe498890), 250, _5680)
   Call: (495) [system] 250>=2000
^  Redo: (494) [user] count_lines_in_stream(2000, (0x55aefe498890), 250, _5680)
   Call: (495) [read_util] read_util:read_line_to_codes((0x55aefe498890), _390246)
   Exit: (495) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (495) [system] []==end_of_file
^  Redo: (494) [user] count_lines_in_stream(2000, (0x55aefe498890), 250, _5680)
   Call: (495) [system] _393974 is 250+1
   Exit: (495) [system] 251 is 250+1
^  Call: (495) [user] count_lines_in_stream(2000, (0x55aefe498890), 251, _5680)
^  Unify: (495) [user] count_lines_in_stream(2000, (0x55aefe498890), 251, _5680)
   Call: (496) [system] 251>=2000
^  Redo: (495) [user] count_lines_in_stream(2000, (0x55aefe498890), 251, _5680)
   Call: (496) [read_util] read_util:read_line_to_codes((0x55aefe498890), _399568)
   Exit: (496) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(: or (-> Bool Bool Bool))`)
   Call: (496) [system] `(: or (-> Bool Bool Bool))`==end_of_file
^  Redo: (495) [user] count_lines_in_stream(2000, (0x55aefe498890), 251, _5680)
   Call: (496) [system] _403452 is 251+1
   Exit: (496) [system] 252 is 251+1
^  Call: (496) [user] count_lines_in_stream(2000, (0x55aefe498890), 252, _5680)
^  Unify: (496) [user] count_lines_in_stream(2000, (0x55aefe498890), 252, _5680)
   Call: (497) [system] 252>=2000
^  Redo: (496) [user] count_lines_in_stream(2000, (0x55aefe498890), 252, _5680)
   Call: (497) [read_util] read_util:read_line_to_codes((0x55aefe498890), _409046)
   Exit: (497) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (or False False) False)`)
   Call: (497) [system] `(= (or False False) False)`==end_of_file
^  Redo: (496) [user] count_lines_in_stream(2000, (0x55aefe498890), 252, _5680)
   Call: (497) [system] _412930 is 252+1
   Exit: (497) [system] 253 is 252+1
^  Call: (497) [user] count_lines_in_stream(2000, (0x55aefe498890), 253, _5680)
^  Unify: (497) [user] count_lines_in_stream(2000, (0x55aefe498890), 253, _5680)
   Call: (498) [system] 253>=2000
^  Redo: (497) [user] count_lines_in_stream(2000, (0x55aefe498890), 253, _5680)
   Call: (498) [read_util] read_util:read_line_to_codes((0x55aefe498890), _418524)
   Exit: (498) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (or False True) True)`)
   Call: (498) [system] `(= (or False True) True)`==end_of_file
^  Redo: (497) [user] count_lines_in_stream(2000, (0x55aefe498890), 253, _5680)
   Call: (498) [system] _422396 is 253+1
   Exit: (498) [system] 254 is 253+1
^  Call: (498) [user] count_lines_in_stream(2000, (0x55aefe498890), 254, _5680)
^  Unify: (498) [user] count_lines_in_stream(2000, (0x55aefe498890), 254, _5680)
   Call: (499) [system] 254>=2000
^  Redo: (498) [user] count_lines_in_stream(2000, (0x55aefe498890), 254, _5680)
   Call: (499) [read_util] read_util:read_line_to_codes((0x55aefe498890), _427990)
   Exit: (499) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (or True False) True)`)
   Call: (499) [system] `(= (or True False) True)`==end_of_file
^  Redo: (498) [user] count_lines_in_stream(2000, (0x55aefe498890), 254, _5680)
   Call: (499) [system] _431862 is 254+1
   Exit: (499) [system] 255 is 254+1
^  Call: (499) [user] count_lines_in_stream(2000, (0x55aefe498890), 255, _5680)
^  Unify: (499) [user] count_lines_in_stream(2000, (0x55aefe498890), 255, _5680)
   Call: (500) [system] 255>=2000
^  Redo: (499) [user] count_lines_in_stream(2000, (0x55aefe498890), 255, _5680)
   Call: (500) [read_util] read_util:read_line_to_codes((0x55aefe498890), _437456)
   Exit: (500) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (or True True) True)`)
   Call: (500) [system] `(= (or True True) True)`==end_of_file
^  Redo: (499) [user] count_lines_in_stream(2000, (0x55aefe498890), 255, _5680)
   Call: (500) [system] _441322 is 255+1
   Exit: (500) [system] 256 is 255+1
^  Call: (500) [user] count_lines_in_stream(2000, (0x55aefe498890), 256, _5680)
^  Unify: (500) [user] count_lines_in_stream(2000, (0x55aefe498890), 256, _5680)
   Call: (501) [system] 256>=2000
^  Redo: (500) [user] count_lines_in_stream(2000, (0x55aefe498890), 256, _5680)
   Call: (501) [read_util] read_util:read_line_to_codes((0x55aefe498890), _446916)
   Exit: (501) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (501) [system] []==end_of_file
^  Redo: (500) [user] count_lines_in_stream(2000, (0x55aefe498890), 256, _5680)
   Call: (501) [system] _450644 is 256+1
   Exit: (501) [system] 257 is 256+1
^  Call: (501) [user] count_lines_in_stream(2000, (0x55aefe498890), 257, _5680)
^  Unify: (501) [user] count_lines_in_stream(2000, (0x55aefe498890), 257, _5680)
   Call: (502) [system] 257>=2000
^  Redo: (501) [user] count_lines_in_stream(2000, (0x55aefe498890), 257, _5680)
   Call: (502) [read_util] read_util:read_line_to_codes((0x55aefe498890), _456238)
   Exit: (502) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(: and (-> Bool Bool Bool))`)
   Call: (502) [system] `(: and (-> Bool Bool Bool))`==end_of_file
^  Redo: (501) [user] count_lines_in_stream(2000, (0x55aefe498890), 257, _5680)
   Call: (502) [system] _460128 is 257+1
   Exit: (502) [system] 258 is 257+1
^  Call: (502) [user] count_lines_in_stream(2000, (0x55aefe498890), 258, _5680)
^  Unify: (502) [user] count_lines_in_stream(2000, (0x55aefe498890), 258, _5680)
   Call: (503) [system] 258>=2000
^  Redo: (502) [user] count_lines_in_stream(2000, (0x55aefe498890), 258, _5680)
   Call: (503) [read_util] read_util:read_line_to_codes((0x55aefe498890), _465722)
   Exit: (503) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (and False False) False)`)
   Call: (503) [system] `(= (and False False) False)`==end_of_file
^  Redo: (502) [user] count_lines_in_stream(2000, (0x55aefe498890), 258, _5680)
   Call: (503) [system] _469612 is 258+1
   Exit: (503) [system] 259 is 258+1
^  Call: (503) [user] count_lines_in_stream(2000, (0x55aefe498890), 259, _5680)
^  Unify: (503) [user] count_lines_in_stream(2000, (0x55aefe498890), 259, _5680)
   Call: (504) [system] 259>=2000
^  Redo: (503) [user] count_lines_in_stream(2000, (0x55aefe498890), 259, _5680)
   Call: (504) [read_util] read_util:read_line_to_codes((0x55aefe498890), _475206)
   Exit: (504) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (and False True) False)`)
   Call: (504) [system] `(= (and False True) False)`==end_of_file
^  Redo: (503) [user] count_lines_in_stream(2000, (0x55aefe498890), 259, _5680)
   Call: (504) [system] _479090 is 259+1
   Exit: (504) [system] 260 is 259+1
^  Call: (504) [user] count_lines_in_stream(2000, (0x55aefe498890), 260, _5680)
^  Unify: (504) [user] count_lines_in_stream(2000, (0x55aefe498890), 260, _5680)
   Call: (505) [system] 260>=2000
^  Redo: (504) [user] count_lines_in_stream(2000, (0x55aefe498890), 260, _5680)
   Call: (505) [read_util] read_util:read_line_to_codes((0x55aefe498890), _484684)
   Exit: (505) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (and True False) False)`)
   Call: (505) [system] `(= (and True False) False)`==end_of_file
^  Redo: (504) [user] count_lines_in_stream(2000, (0x55aefe498890), 260, _5680)
   Call: (505) [system] _488568 is 260+1
   Exit: (505) [system] 261 is 260+1
^  Call: (505) [user] count_lines_in_stream(2000, (0x55aefe498890), 261, _5680)
^  Unify: (505) [user] count_lines_in_stream(2000, (0x55aefe498890), 261, _5680)
   Call: (506) [system] 261>=2000
^  Redo: (505) [user] count_lines_in_stream(2000, (0x55aefe498890), 261, _5680)
   Call: (506) [read_util] read_util:read_line_to_codes((0x55aefe498890), _494162)
   Exit: (506) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (and True True) True)`)
   Call: (506) [system] `(= (and True True) True)`==end_of_file
^  Redo: (505) [user] count_lines_in_stream(2000, (0x55aefe498890), 261, _5680)
   Call: (506) [system] _498034 is 261+1
   Exit: (506) [system] 262 is 261+1
^  Call: (506) [user] count_lines_in_stream(2000, (0x55aefe498890), 262, _5680)
^  Unify: (506) [user] count_lines_in_stream(2000, (0x55aefe498890), 262, _5680)
   Call: (507) [system] 262>=2000
^  Redo: (506) [user] count_lines_in_stream(2000, (0x55aefe498890), 262, _5680)
   Call: (507) [read_util] read_util:read_line_to_codes((0x55aefe498890), _503628)
   Exit: (507) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (507) [system] []==end_of_file
^  Redo: (506) [user] count_lines_in_stream(2000, (0x55aefe498890), 262, _5680)
   Call: (507) [system] _507356 is 262+1
   Exit: (507) [system] 263 is 262+1
^  Call: (507) [user] count_lines_in_stream(2000, (0x55aefe498890), 263, _5680)
^  Unify: (507) [user] count_lines_in_stream(2000, (0x55aefe498890), 263, _5680)
   Call: (508) [system] 263>=2000
^  Redo: (507) [user] count_lines_in_stream(2000, (0x55aefe498890), 263, _5680)
   Call: (508) [read_util] read_util:read_line_to_codes((0x55aefe498890), _512950)
   Exit: (508) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(: not (-> Bool Bool))`)
   Call: (508) [system] `(: not (-> Bool Bool))`==end_of_file
^  Redo: (507) [user] count_lines_in_stream(2000, (0x55aefe498890), 263, _5680)
   Call: (508) [system] _516810 is 263+1
   Exit: (508) [system] 264 is 263+1
^  Call: (508) [user] count_lines_in_stream(2000, (0x55aefe498890), 264, _5680)
^  Unify: (508) [user] count_lines_in_stream(2000, (0x55aefe498890), 264, _5680)
   Call: (509) [system] 264>=2000
^  Redo: (508) [user] count_lines_in_stream(2000, (0x55aefe498890), 264, _5680)
   Call: (509) [read_util] read_util:read_line_to_codes((0x55aefe498890), _522404)
   Exit: (509) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (not True) False)`)
   Call: (509) [system] `(= (not True) False)`==end_of_file
^  Redo: (508) [user] count_lines_in_stream(2000, (0x55aefe498890), 264, _5680)
   Call: (509) [system] _73830 is 264+1
   Exit: (509) [system] 265 is 264+1
^  Call: (509) [user] count_lines_in_stream(2000, (0x55aefe498890), 265, _5680)
^  Unify: (509) [user] count_lines_in_stream(2000, (0x55aefe498890), 265, _5680)
   Call: (510) [system] 265>=2000
^  Redo: (509) [user] count_lines_in_stream(2000, (0x55aefe498890), 265, _5680)
   Call: (510) [read_util] read_util:read_line_to_codes((0x55aefe498890), _79424)
   Exit: (510) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (not False) True)`)
   Call: (510) [system] `(= (not False) True)`==end_of_file
^  Redo: (509) [user] count_lines_in_stream(2000, (0x55aefe498890), 265, _5680)
   Call: (510) [system] _83272 is 265+1
   Exit: (510) [system] 266 is 265+1
^  Call: (510) [user] count_lines_in_stream(2000, (0x55aefe498890), 266, _5680)
^  Unify: (510) [user] count_lines_in_stream(2000, (0x55aefe498890), 266, _5680)
   Call: (511) [system] 266>=2000
^  Redo: (510) [user] count_lines_in_stream(2000, (0x55aefe498890), 266, _5680)
   Call: (511) [read_util] read_util:read_line_to_codes((0x55aefe498890), _88866)
   Exit: (511) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (511) [system] []==end_of_file
^  Redo: (510) [user] count_lines_in_stream(2000, (0x55aefe498890), 266, _5680)
   Call: (511) [system] _92594 is 266+1
   Exit: (511) [system] 267 is 266+1
^  Call: (511) [user] count_lines_in_stream(2000, (0x55aefe498890), 267, _5680)
^  Unify: (511) [user] count_lines_in_stream(2000, (0x55aefe498890), 267, _5680)
   Call: (512) [system] 267>=2000
^  Redo: (511) [user] count_lines_in_stream(2000, (0x55aefe498890), 267, _5680)
   Call: (512) [read_util] read_util:read_line_to_codes((0x55aefe498890), _98188)
   Exit: (512) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: match (-> Atom Atom Ato ... |)
   Call: (512) [system] |(: match (-> Atom Atom Ato ... |==end_of_file
^  Redo: (511) [user] count_lines_in_stream(2000, (0x55aefe498890), 267, _5680)
   Call: (512) [system] _102162 is 267+1
   Exit: (512) [system] 268 is 267+1
^  Call: (512) [user] count_lines_in_stream(2000, (0x55aefe498890), 268, _5680)
^  Unify: (512) [user] count_lines_in_stream(2000, (0x55aefe498890), 268, _5680)
   Call: (513) [system] 268>=2000
^  Redo: (512) [user] count_lines_in_stream(2000, (0x55aefe498890), 268, _5680)
   Call: (513) [read_util] read_util:read_line_to_codes((0x55aefe498890), _107756)
   Exit: (513) [read_util] read_util:read_line_to_codes((0x55aefe498890), |;(= (match $space $pattern ... |)
   Call: (513) [system] |;(= (match $space $pattern ... |==end_of_file
^  Redo: (512) [user] count_lines_in_stream(2000, (0x55aefe498890), 268, _5680)
   Call: (513) [system] _111706 is 268+1
   Exit: (513) [system] 269 is 268+1
^  Call: (513) [user] count_lines_in_stream(2000, (0x55aefe498890), 269, _5680)
^  Unify: (513) [user] count_lines_in_stream(2000, (0x55aefe498890), 269, _5680)
   Call: (514) [system] 269>=2000
^  Redo: (513) [user] count_lines_in_stream(2000, (0x55aefe498890), 269, _5680)
   Call: (514) [read_util] read_util:read_line_to_codes((0x55aefe498890), _117300)
   Exit: (514) [read_util] read_util:read_line_to_codes((0x55aefe498890), |;  (unify $pattern $space  ... |)
   Call: (514) [system] |;  (unify $pattern $space  ... |==end_of_file
^  Redo: (513) [user] count_lines_in_stream(2000, (0x55aefe498890), 269, _5680)
   Call: (514) [system] _121286 is 269+1
   Exit: (514) [system] 270 is 269+1
^  Call: (514) [user] count_lines_in_stream(2000, (0x55aefe498890), 270, _5680)
^  Unify: (514) [user] count_lines_in_stream(2000, (0x55aefe498890), 270, _5680)
   Call: (515) [system] 270>=2000
^  Redo: (514) [user] count_lines_in_stream(2000, (0x55aefe498890), 270, _5680)
   Call: (515) [read_util] read_util:read_line_to_codes((0x55aefe498890), _126880)
   Exit: (515) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (515) [system] []==end_of_file
^  Redo: (514) [user] count_lines_in_stream(2000, (0x55aefe498890), 270, _5680)
   Call: (515) [system] _130608 is 270+1
   Exit: (515) [system] 271 is 270+1
^  Call: (515) [user] count_lines_in_stream(2000, (0x55aefe498890), 271, _5680)
^  Unify: (515) [user] count_lines_in_stream(2000, (0x55aefe498890), 271, _5680)
   Call: (516) [system] 271>=2000
^  Redo: (515) [user] count_lines_in_stream(2000, (0x55aefe498890), 271, _5680)
   Call: (516) [read_util] read_util:read_line_to_codes((0x55aefe498890), _136202)
   Exit: (516) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: let (-> Atom %Undefined ... |)
   Call: (516) [system] |(: let (-> Atom %Undefined ... |==end_of_file
^  Redo: (515) [user] count_lines_in_stream(2000, (0x55aefe498890), 271, _5680)
   Call: (516) [system] _140164 is 271+1
   Exit: (516) [system] 272 is 271+1
^  Call: (516) [user] count_lines_in_stream(2000, (0x55aefe498890), 272, _5680)
^  Unify: (516) [user] count_lines_in_stream(2000, (0x55aefe498890), 272, _5680)
   Call: (517) [system] 272>=2000
^  Redo: (516) [user] count_lines_in_stream(2000, (0x55aefe498890), 272, _5680)
   Call: (517) [read_util] read_util:read_line_to_codes((0x55aefe498890), _145758)
   Exit: (517) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(= (let $pattern $atom $te ... |)
   Call: (517) [system] |(= (let $pattern $atom $te ... |==end_of_file
^  Redo: (516) [user] count_lines_in_stream(2000, (0x55aefe498890), 272, _5680)
   Call: (517) [system] _149684 is 272+1
   Exit: (517) [system] 273 is 272+1
^  Call: (517) [user] count_lines_in_stream(2000, (0x55aefe498890), 273, _5680)
^  Unify: (517) [user] count_lines_in_stream(2000, (0x55aefe498890), 273, _5680)
   Call: (518) [system] 273>=2000
^  Redo: (517) [user] count_lines_in_stream(2000, (0x55aefe498890), 273, _5680)
   Call: (518) [read_util] read_util:read_line_to_codes((0x55aefe498890), _155278)
   Exit: (518) [read_util] read_util:read_line_to_codes((0x55aefe498890), `  (`)
   Call: (518) [system] `  (`==end_of_file
^  Redo: (517) [user] count_lines_in_stream(2000, (0x55aefe498890), 273, _5680)
   Call: (518) [system] _159024 is 273+1
   Exit: (518) [system] 274 is 273+1
^  Call: (518) [user] count_lines_in_stream(2000, (0x55aefe498890), 274, _5680)
^  Unify: (518) [user] count_lines_in_stream(2000, (0x55aefe498890), 274, _5680)
   Call: (519) [system] 274>=2000
^  Redo: (518) [user] count_lines_in_stream(2000, (0x55aefe498890), 274, _5680)
   Call: (519) [read_util] read_util:read_line_to_codes((0x55aefe498890), _164618)
   Exit: (519) [read_util] read_util:read_line_to_codes((0x55aefe498890), [9, 32, 36, 97, 116, 111, 109, 32, 36, 112, 97, 116, 116, 101, 114, 110, 32, 36, 116, 101, 109, 112, 108, 97, 116, 101, 32, 69, 109, 112, 116, 121, 41, 41])
   Call: (519) [system] [9, 32, 36, 97, 116, 111, 109, 32, 36, 112, 97, 116, 116, 101, 114, 110, 32, 36, 116, 101, 109, 112, 108, 97, 116, 101, 32, 69, 109, 112, 116, 121, 41, 41]==end_of_file
^  Redo: (518) [user] count_lines_in_stream(2000, (0x55aefe498890), 274, _5680)
   Call: (519) [system] _168550 is 274+1
   Exit: (519) [system] 275 is 274+1
^  Call: (519) [user] count_lines_in_stream(2000, (0x55aefe498890), 275, _5680)
^  Unify: (519) [user] count_lines_in_stream(2000, (0x55aefe498890), 275, _5680)
   Call: (520) [system] 275>=2000
^  Redo: (519) [user] count_lines_in_stream(2000, (0x55aefe498890), 275, _5680)
   Call: (520) [read_util] read_util:read_line_to_codes((0x55aefe498890), _174144)
   Exit: (520) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (520) [system] []==end_of_file
^  Redo: (519) [user] count_lines_in_stream(2000, (0x55aefe498890), 275, _5680)
   Call: (520) [system] _177872 is 275+1
   Exit: (520) [system] 276 is 275+1
^  Call: (520) [user] count_lines_in_stream(2000, (0x55aefe498890), 276, _5680)
^  Unify: (520) [user] count_lines_in_stream(2000, (0x55aefe498890), 276, _5680)
   Call: (521) [system] 276>=2000
^  Redo: (520) [user] count_lines_in_stream(2000, (0x55aefe498890), 276, _5680)
   Call: (521) [read_util] read_util:read_line_to_codes((0x55aefe498890), _183466)
   Exit: (521) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: let* (-> Expression Ato ... |)
   Call: (521) [system] |(: let* (-> Expression Ato ... |==end_of_file
^  Redo: (520) [user] count_lines_in_stream(2000, (0x55aefe498890), 276, _5680)
   Call: (521) [system] _187398 is 276+1
   Exit: (521) [system] 277 is 276+1
^  Call: (521) [user] count_lines_in_stream(2000, (0x55aefe498890), 277, _5680)
^  Unify: (521) [user] count_lines_in_stream(2000, (0x55aefe498890), 277, _5680)
   Call: (522) [system] 277>=2000
^  Redo: (521) [user] count_lines_in_stream(2000, (0x55aefe498890), 277, _5680)
   Call: (522) [read_util] read_util:read_line_to_codes((0x55aefe498890), _192992)
   Exit: (522) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (let* $pairs $template)`)
   Call: (522) [system] `(= (let* $pairs $template)`==end_of_file
^  Redo: (521) [user] count_lines_in_stream(2000, (0x55aefe498890), 277, _5680)
   Call: (522) [system] _196876 is 277+1
   Exit: (522) [system] 278 is 277+1
^  Call: (522) [user] count_lines_in_stream(2000, (0x55aefe498890), 278, _5680)
^  Unify: (522) [user] count_lines_in_stream(2000, (0x55aefe498890), 278, _5680)
   Call: (523) [system] 278>=2000
^  Redo: (522) [user] count_lines_in_stream(2000, (0x55aefe498890), 278, _5680)
   Call: (523) [read_util] read_util:read_line_to_codes((0x55aefe498890), _202470)
   Exit: (523) [read_util] read_util:read_line_to_codes((0x55aefe498890), |  (eval (if-decons-expr $p ... |)
   Call: (523) [system] |  (eval (if-decons-expr $p ... |==end_of_file
^  Redo: (522) [user] count_lines_in_stream(2000, (0x55aefe498890), 278, _5680)
   Call: (523) [system] _206516 is 278+1
   Exit: (523) [system] 279 is 278+1
^  Call: (523) [user] count_lines_in_stream(2000, (0x55aefe498890), 279, _5680)
^  Unify: (523) [user] count_lines_in_stream(2000, (0x55aefe498890), 279, _5680)
   Call: (524) [system] 279>=2000
^  Redo: (523) [user] count_lines_in_stream(2000, (0x55aefe498890), 279, _5680)
   Call: (524) [read_util] read_util:read_line_to_codes((0x55aefe498890), _212110)
   Exit: (524) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (let $pattern $atom (l ... |)
   Call: (524) [system] |    (let $pattern $atom (l ... |==end_of_file
^  Redo: (523) [user] count_lines_in_stream(2000, (0x55aefe498890), 279, _5680)
   Call: (524) [system] _216120 is 279+1
   Exit: (524) [system] 280 is 279+1
^  Call: (524) [user] count_lines_in_stream(2000, (0x55aefe498890), 280, _5680)
^  Unify: (524) [user] count_lines_in_stream(2000, (0x55aefe498890), 280, _5680)
   Call: (525) [system] 280>=2000
^  Redo: (524) [user] count_lines_in_stream(2000, (0x55aefe498890), 280, _5680)
   Call: (525) [read_util] read_util:read_line_to_codes((0x55aefe498890), _221714)
   Exit: (525) [read_util] read_util:read_line_to_codes((0x55aefe498890), `    $template )))`)
   Call: (525) [system] `    $template )))`==end_of_file
^  Redo: (524) [user] count_lines_in_stream(2000, (0x55aefe498890), 280, _5680)
   Call: (525) [system] _225544 is 280+1
   Exit: (525) [system] 281 is 280+1
^  Call: (525) [user] count_lines_in_stream(2000, (0x55aefe498890), 281, _5680)
^  Unify: (525) [user] count_lines_in_stream(2000, (0x55aefe498890), 281, _5680)
   Call: (526) [system] 281>=2000
^  Redo: (525) [user] count_lines_in_stream(2000, (0x55aefe498890), 281, _5680)
   Call: (526) [read_util] read_util:read_line_to_codes((0x55aefe498890), _231138)
   Exit: (526) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (526) [system] []==end_of_file
^  Redo: (525) [user] count_lines_in_stream(2000, (0x55aefe498890), 281, _5680)
   Call: (526) [system] _234866 is 281+1
   Exit: (526) [system] 282 is 281+1
^  Call: (526) [user] count_lines_in_stream(2000, (0x55aefe498890), 282, _5680)
^  Unify: (526) [user] count_lines_in_stream(2000, (0x55aefe498890), 282, _5680)
   Call: (527) [system] 282>=2000
^  Redo: (526) [user] count_lines_in_stream(2000, (0x55aefe498890), 282, _5680)
   Call: (527) [read_util] read_util:read_line_to_codes((0x55aefe498890), _240460)
   Exit: (527) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: add-reduct (-> Grounded ... |)
   Call: (527) [system] |(: add-reduct (-> Grounded ... |==end_of_file
^  Redo: (526) [user] count_lines_in_stream(2000, (0x55aefe498890), 282, _5680)
   Call: (527) [system] _244458 is 282+1
   Exit: (527) [system] 283 is 282+1
^  Call: (527) [user] count_lines_in_stream(2000, (0x55aefe498890), 283, _5680)
^  Unify: (527) [user] count_lines_in_stream(2000, (0x55aefe498890), 283, _5680)
   Call: (528) [system] 283>=2000
^  Redo: (527) [user] count_lines_in_stream(2000, (0x55aefe498890), 283, _5680)
   Call: (528) [read_util] read_util:read_line_to_codes((0x55aefe498890), _250052)
   Exit: (528) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(= (add-reduct $dst $atom) ... |)
   Call: (528) [system] |(= (add-reduct $dst $atom) ... |==end_of_file
^  Redo: (527) [user] count_lines_in_stream(2000, (0x55aefe498890), 283, _5680)
   Call: (528) [system] _254080 is 283+1
   Exit: (528) [system] 284 is 283+1
^  Call: (528) [user] count_lines_in_stream(2000, (0x55aefe498890), 284, _5680)
^  Unify: (528) [user] count_lines_in_stream(2000, (0x55aefe498890), 284, _5680)
   Call: (529) [system] 284>=2000
^  Redo: (528) [user] count_lines_in_stream(2000, (0x55aefe498890), 284, _5680)
   Call: (529) [read_util] read_util:read_line_to_codes((0x55aefe498890), _259674)
   Exit: (529) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (529) [system] []==end_of_file
^  Redo: (528) [user] count_lines_in_stream(2000, (0x55aefe498890), 284, _5680)
   Call: (529) [system] _263402 is 284+1
   Exit: (529) [system] 285 is 284+1
^  Call: (529) [user] count_lines_in_stream(2000, (0x55aefe498890), 285, _5680)
^  Unify: (529) [user] count_lines_in_stream(2000, (0x55aefe498890), 285, _5680)
   Call: (530) [system] 285>=2000
^  Redo: (529) [user] count_lines_in_stream(2000, (0x55aefe498890), 285, _5680)
   Call: (530) [read_util] read_util:read_line_to_codes((0x55aefe498890), _268996)
   Exit: (530) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: car-atom (-> Expression ... |)
   Call: (530) [system] |(: car-atom (-> Expression ... |==end_of_file
^  Redo: (529) [user] count_lines_in_stream(2000, (0x55aefe498890), 285, _5680)
   Call: (530) [system] _272922 is 285+1
   Exit: (530) [system] 286 is 285+1
^  Call: (530) [user] count_lines_in_stream(2000, (0x55aefe498890), 286, _5680)
^  Unify: (530) [user] count_lines_in_stream(2000, (0x55aefe498890), 286, _5680)
   Call: (531) [system] 286>=2000
^  Redo: (530) [user] count_lines_in_stream(2000, (0x55aefe498890), 286, _5680)
   Call: (531) [read_util] read_util:read_line_to_codes((0x55aefe498890), _278516)
   Exit: (531) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (car-atom $atom)`)
   Call: (531) [system] `(= (car-atom $atom)`==end_of_file
^  Redo: (530) [user] count_lines_in_stream(2000, (0x55aefe498890), 286, _5680)
   Call: (531) [system] _282358 is 286+1
   Exit: (531) [system] 287 is 286+1
^  Call: (531) [user] count_lines_in_stream(2000, (0x55aefe498890), 287, _5680)
^  Unify: (531) [user] count_lines_in_stream(2000, (0x55aefe498890), 287, _5680)
   Call: (532) [system] 287>=2000
^  Redo: (531) [user] count_lines_in_stream(2000, (0x55aefe498890), 287, _5680)
   Call: (532) [read_util] read_util:read_line_to_codes((0x55aefe498890), _287952)
   Exit: (532) [read_util] read_util:read_line_to_codes((0x55aefe498890), |  (eval (if-decons-expr $a ... |)
   Call: (532) [system] |  (eval (if-decons-expr $a ... |==end_of_file
^  Redo: (531) [user] count_lines_in_stream(2000, (0x55aefe498890), 287, _5680)
   Call: (532) [system] _291908 is 287+1
   Exit: (532) [system] 288 is 287+1
^  Call: (532) [user] count_lines_in_stream(2000, (0x55aefe498890), 288, _5680)
^  Unify: (532) [user] count_lines_in_stream(2000, (0x55aefe498890), 288, _5680)
   Call: (533) [system] 288>=2000
^  Redo: (532) [user] count_lines_in_stream(2000, (0x55aefe498890), 288, _5680)
   Call: (533) [read_util] read_util:read_line_to_codes((0x55aefe498890), _297502)
   Exit: (533) [read_util] read_util:read_line_to_codes((0x55aefe498890), `    $head`)
   Call: (533) [system] `    $head`==end_of_file
^  Redo: (532) [user] count_lines_in_stream(2000, (0x55aefe498890), 288, _5680)
   Call: (533) [system] _301284 is 288+1
   Exit: (533) [system] 289 is 288+1
^  Call: (533) [user] count_lines_in_stream(2000, (0x55aefe498890), 289, _5680)
^  Unify: (533) [user] count_lines_in_stream(2000, (0x55aefe498890), 289, _5680)
   Call: (534) [system] 289>=2000
^  Redo: (533) [user] count_lines_in_stream(2000, (0x55aefe498890), 289, _5680)
   Call: (534) [read_util] read_util:read_line_to_codes((0x55aefe498890), _306878)
   Exit: (534) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (Error (car-atom $atom ... |)
   Call: (534) [system] |    (Error (car-atom $atom ... |==end_of_file
^  Redo: (533) [user] count_lines_in_stream(2000, (0x55aefe498890), 289, _5680)
   Call: (534) [system] _311140 is 289+1
   Exit: (534) [system] 290 is 289+1
^  Call: (534) [user] count_lines_in_stream(2000, (0x55aefe498890), 290, _5680)
^  Unify: (534) [user] count_lines_in_stream(2000, (0x55aefe498890), 290, _5680)
   Call: (535) [system] 290>=2000
^  Redo: (534) [user] count_lines_in_stream(2000, (0x55aefe498890), 290, _5680)
   Call: (535) [read_util] read_util:read_line_to_codes((0x55aefe498890), _316734)
   Exit: (535) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (535) [system] []==end_of_file
^  Redo: (534) [user] count_lines_in_stream(2000, (0x55aefe498890), 290, _5680)
   Call: (535) [system] _320462 is 290+1
   Exit: (535) [system] 291 is 290+1
^  Call: (535) [user] count_lines_in_stream(2000, (0x55aefe498890), 291, _5680)
^  Unify: (535) [user] count_lines_in_stream(2000, (0x55aefe498890), 291, _5680)
   Call: (536) [system] 291>=2000
^  Redo: (535) [user] count_lines_in_stream(2000, (0x55aefe498890), 291, _5680)
   Call: (536) [read_util] read_util:read_line_to_codes((0x55aefe498890), _326056)
   Exit: (536) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: cdr-atom (-> Expression ... |)
   Call: (536) [system] |(: cdr-atom (-> Expression ... |==end_of_file
^  Redo: (535) [user] count_lines_in_stream(2000, (0x55aefe498890), 291, _5680)
   Call: (536) [system] _330018 is 291+1
   Exit: (536) [system] 292 is 291+1
^  Call: (536) [user] count_lines_in_stream(2000, (0x55aefe498890), 292, _5680)
^  Unify: (536) [user] count_lines_in_stream(2000, (0x55aefe498890), 292, _5680)
   Call: (537) [system] 292>=2000
^  Redo: (536) [user] count_lines_in_stream(2000, (0x55aefe498890), 292, _5680)
   Call: (537) [read_util] read_util:read_line_to_codes((0x55aefe498890), _335612)
   Exit: (537) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (cdr-atom $atom)`)
   Call: (537) [system] `(= (cdr-atom $atom)`==end_of_file
^  Redo: (536) [user] count_lines_in_stream(2000, (0x55aefe498890), 292, _5680)
   Call: (537) [system] _339454 is 292+1
   Exit: (537) [system] 293 is 292+1
^  Call: (537) [user] count_lines_in_stream(2000, (0x55aefe498890), 293, _5680)
^  Unify: (537) [user] count_lines_in_stream(2000, (0x55aefe498890), 293, _5680)
   Call: (538) [system] 293>=2000
^  Redo: (537) [user] count_lines_in_stream(2000, (0x55aefe498890), 293, _5680)
   Call: (538) [read_util] read_util:read_line_to_codes((0x55aefe498890), _345048)
   Exit: (538) [read_util] read_util:read_line_to_codes((0x55aefe498890), |  (eval (if-decons-expr $a ... |)
   Call: (538) [system] |  (eval (if-decons-expr $a ... |==end_of_file
^  Redo: (537) [user] count_lines_in_stream(2000, (0x55aefe498890), 293, _5680)
   Call: (538) [system] _349004 is 293+1
   Exit: (538) [system] 294 is 293+1
^  Call: (538) [user] count_lines_in_stream(2000, (0x55aefe498890), 294, _5680)
^  Unify: (538) [user] count_lines_in_stream(2000, (0x55aefe498890), 294, _5680)
   Call: (539) [system] 294>=2000
^  Redo: (538) [user] count_lines_in_stream(2000, (0x55aefe498890), 294, _5680)
   Call: (539) [read_util] read_util:read_line_to_codes((0x55aefe498890), _354598)
   Exit: (539) [read_util] read_util:read_line_to_codes((0x55aefe498890), `    $tail`)
   Call: (539) [system] `    $tail`==end_of_file
^  Redo: (538) [user] count_lines_in_stream(2000, (0x55aefe498890), 294, _5680)
   Call: (539) [system] _358380 is 294+1
   Exit: (539) [system] 295 is 294+1
^  Call: (539) [user] count_lines_in_stream(2000, (0x55aefe498890), 295, _5680)
^  Unify: (539) [user] count_lines_in_stream(2000, (0x55aefe498890), 295, _5680)
   Call: (540) [system] 295>=2000
^  Redo: (539) [user] count_lines_in_stream(2000, (0x55aefe498890), 295, _5680)
   Call: (540) [read_util] read_util:read_line_to_codes((0x55aefe498890), _363974)
   Exit: (540) [read_util] read_util:read_line_to_codes((0x55aefe498890), |    (Error (cdr-atom $atom ... |)
   Call: (540) [system] |    (Error (cdr-atom $atom ... |==end_of_file
^  Redo: (539) [user] count_lines_in_stream(2000, (0x55aefe498890), 295, _5680)
   Call: (540) [system] _368236 is 295+1
   Exit: (540) [system] 296 is 295+1
^  Call: (540) [user] count_lines_in_stream(2000, (0x55aefe498890), 296, _5680)
^  Unify: (540) [user] count_lines_in_stream(2000, (0x55aefe498890), 296, _5680)
   Call: (541) [system] 296>=2000
^  Redo: (540) [user] count_lines_in_stream(2000, (0x55aefe498890), 296, _5680)
   Call: (541) [read_util] read_util:read_line_to_codes((0x55aefe498890), _373830)
   Exit: (541) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (541) [system] []==end_of_file
^  Redo: (540) [user] count_lines_in_stream(2000, (0x55aefe498890), 296, _5680)
   Call: (541) [system] _377558 is 296+1
   Exit: (541) [system] 297 is 296+1
^  Call: (541) [user] count_lines_in_stream(2000, (0x55aefe498890), 297, _5680)
^  Unify: (541) [user] count_lines_in_stream(2000, (0x55aefe498890), 297, _5680)
   Call: (542) [system] 297>=2000
^  Redo: (541) [user] count_lines_in_stream(2000, (0x55aefe498890), 297, _5680)
   Call: (542) [read_util] read_util:read_line_to_codes((0x55aefe498890), _383152)
   Exit: (542) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(: quote (-> Atom Atom))`)
   Call: (542) [system] `(: quote (-> Atom Atom))`==end_of_file
^  Redo: (541) [user] count_lines_in_stream(2000, (0x55aefe498890), 297, _5680)
   Call: (542) [system] _387024 is 297+1
   Exit: (542) [system] 298 is 297+1
^  Call: (542) [user] count_lines_in_stream(2000, (0x55aefe498890), 298, _5680)
^  Unify: (542) [user] count_lines_in_stream(2000, (0x55aefe498890), 298, _5680)
   Call: (543) [system] 298>=2000
^  Redo: (542) [user] count_lines_in_stream(2000, (0x55aefe498890), 298, _5680)
   Call: (543) [read_util] read_util:read_line_to_codes((0x55aefe498890), _392618)
   Exit: (543) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (quote $atom) NotReducible)`)
   Call: (543) [system] `(= (quote $atom) NotReducible)`==end_of_file
^  Redo: (542) [user] count_lines_in_stream(2000, (0x55aefe498890), 298, _5680)
   Call: (543) [system] _396526 is 298+1
   Exit: (543) [system] 299 is 298+1
^  Call: (543) [user] count_lines_in_stream(2000, (0x55aefe498890), 299, _5680)
^  Unify: (543) [user] count_lines_in_stream(2000, (0x55aefe498890), 299, _5680)
   Call: (544) [system] 299>=2000
^  Redo: (543) [user] count_lines_in_stream(2000, (0x55aefe498890), 299, _5680)
   Call: (544) [read_util] read_util:read_line_to_codes((0x55aefe498890), _402120)
   Exit: (544) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (544) [system] []==end_of_file
^  Redo: (543) [user] count_lines_in_stream(2000, (0x55aefe498890), 299, _5680)
   Call: (544) [system] _405848 is 299+1
   Exit: (544) [system] 300 is 299+1
^  Call: (544) [user] count_lines_in_stream(2000, (0x55aefe498890), 300, _5680)
^  Unify: (544) [user] count_lines_in_stream(2000, (0x55aefe498890), 300, _5680)
   Call: (545) [system] 300>=2000
^  Redo: (544) [user] count_lines_in_stream(2000, (0x55aefe498890), 300, _5680)
   Call: (545) [read_util] read_util:read_line_to_codes((0x55aefe498890), _411442)
   Exit: (545) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(: unquote (-> %Undefined% ... |)
   Call: (545) [system] |(: unquote (-> %Undefined% ... |==end_of_file
^  Redo: (544) [user] count_lines_in_stream(2000, (0x55aefe498890), 300, _5680)
   Call: (545) [system] _415410 is 300+1
   Exit: (545) [system] 301 is 300+1
^  Call: (545) [user] count_lines_in_stream(2000, (0x55aefe498890), 301, _5680)
^  Unify: (545) [user] count_lines_in_stream(2000, (0x55aefe498890), 301, _5680)
   Call: (546) [system] 301>=2000
^  Redo: (545) [user] count_lines_in_stream(2000, (0x55aefe498890), 301, _5680)
   Call: (546) [read_util] read_util:read_line_to_codes((0x55aefe498890), _421004)
   Exit: (546) [read_util] read_util:read_line_to_codes((0x55aefe498890), |(= (unquote (quote $atom)) ... |)
   Call: (546) [system] |(= (unquote (quote $atom)) ... |==end_of_file
^  Redo: (545) [user] count_lines_in_stream(2000, (0x55aefe498890), 301, _5680)
   Call: (546) [system] _424930 is 301+1
   Exit: (546) [system] 302 is 301+1
^  Call: (546) [user] count_lines_in_stream(2000, (0x55aefe498890), 302, _5680)
^  Unify: (546) [user] count_lines_in_stream(2000, (0x55aefe498890), 302, _5680)
   Call: (547) [system] 302>=2000
^  Redo: (546) [user] count_lines_in_stream(2000, (0x55aefe498890), 302, _5680)
   Call: (547) [read_util] read_util:read_line_to_codes((0x55aefe498890), _430524)
   Exit: (547) [read_util] read_util:read_line_to_codes((0x55aefe498890), [])
   Call: (547) [system] []==end_of_file
^  Redo: (546) [user] count_lines_in_stream(2000, (0x55aefe498890), 302, _5680)
   Call: (547) [system] _434252 is 302+1
   Exit: (547) [system] 303 is 302+1
^  Call: (547) [user] count_lines_in_stream(2000, (0x55aefe498890), 303, _5680)
^  Unify: (547) [user] count_lines_in_stream(2000, (0x55aefe498890), 303, _5680)
   Call: (548) [system] 303>=2000
^  Redo: (547) [user] count_lines_in_stream(2000, (0x55aefe498890), 303, _5680)
   Call: (548) [read_util] read_util:read_line_to_codes((0x55aefe498890), _439846)
   Exit: (548) [read_util] read_util:read_line_to_codes((0x55aefe498890), |; TODO: there is no way to ... |)
   Call: (548) [system] |; TODO: there is no way to ... |==end_of_file
^  Redo: (547) [user] count_lines_in_stream(2000, (0x55aefe498890), 303, _5680)
   Call: (548) [system] _444006 is 303+1
   Exit: (548) [system] 304 is 303+1
^  Call: (548) [user] count_lines_in_stream(2000, (0x55aefe498890), 304, _5680)
^  Unify: (548) [user] count_lines_in_stream(2000, (0x55aefe498890), 304, _5680)
   Call: (549) [system] 304>=2000
^  Redo: (548) [user] count_lines_in_stream(2000, (0x55aefe498890), 304, _5680)
   Call: (549) [read_util] read_util:read_line_to_codes((0x55aefe498890), _449600)
   Exit: (549) [read_util] read_util:read_line_to_codes((0x55aefe498890), `; arguments  and returns unit`)
   Call: (549) [system] `; arguments  and returns unit`==end_of_file
^  Redo: (548) [user] count_lines_in_stream(2000, (0x55aefe498890), 304, _5680)
   Call: (549) [system] _453502 is 304+1
   Exit: (549) [system] 305 is 304+1
^  Call: (549) [user] count_lines_in_stream(2000, (0x55aefe498890), 305, _5680)
^  Unify: (549) [user] count_lines_in_stream(2000, (0x55aefe498890), 305, _5680)
   Call: (550) [system] 305>=2000
^  Redo: (549) [user] count_lines_in_stream(2000, (0x55aefe498890), 305, _5680)
   Call: (550) [read_util] read_util:read_line_to_codes((0x55aefe498890), _459096)
   Exit: (550) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (nop) ())`)
   Call: (550) [system] `(= (nop) ())`==end_of_file
^  Redo: (549) [user] count_lines_in_stream(2000, (0x55aefe498890), 305, _5680)
   Call: (550) [system] _462896 is 305+1
   Exit: (550) [system] 306 is 305+1
^  Call: (550) [user] count_lines_in_stream(2000, (0x55aefe498890), 306, _5680)
^  Unify: (550) [user] count_lines_in_stream(2000, (0x55aefe498890), 306, _5680)
   Call: (551) [system] 306>=2000
^  Redo: (550) [user] count_lines_in_stream(2000, (0x55aefe498890), 306, _5680)
   Call: (551) [read_util] read_util:read_line_to_codes((0x55aefe498890), _468490)
   Exit: (551) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (nop $x) ())`)
   Call: (551) [system] `(= (nop $x) ())`==end_of_file
^  Redo: (550) [user] count_lines_in_stream(2000, (0x55aefe498890), 306, _5680)
   Call: (551) [system] _472308 is 306+1
   Exit: (551) [system] 307 is 306+1
^  Call: (551) [user] count_lines_in_stream(2000, (0x55aefe498890), 307, _5680)
^  Unify: (551) [user] count_lines_in_stream(2000, (0x55aefe498890), 307, _5680)
   Call: (552) [system] 307>=2000
^  Redo: (551) [user] count_lines_in_stream(2000, (0x55aefe498890), 307, _5680)
   Call: (552) [read_util] read_util:read_line_to_codes((0x55aefe498890), _477902)
   Exit: (552) [read_util] read_util:read_line_to_codes((0x55aefe498890), |; TODO: MINIMAL added for  ... |)
   Call: (552) [system] |; TODO: MINIMAL added for  ... |==end_of_file
^  Redo: (551) [user] count_lines_in_stream(2000, (0x55aefe498890), 307, _5680)
   Call: (552) [system] _482008 is 307+1
   Exit: (552) [system] 308 is 307+1
^  Call: (552) [user] count_lines_in_stream(2000, (0x55aefe498890), 308, _5680)
^  Unify: (552) [user] count_lines_in_stream(2000, (0x55aefe498890), 308, _5680)
   Call: (553) [system] 308>=2000
^  Redo: (552) [user] count_lines_in_stream(2000, (0x55aefe498890), 308, _5680)
   Call: (553) [read_util] read_util:read_line_to_codes((0x55aefe498890), _487602)
   Exit: (553) [read_util] read_util:read_line_to_codes((0x55aefe498890), `(= (empty) Empty)`)
   Call: (553) [system] `(= (empty) Empty)`==end_of_file
^  Redo: (552) [user] count_lines_in_stream(2000, (0x55aefe498890), 308, _5680)
   Call: (553) [system] _491432 is 308+1
   Exit: (553) [system] 309 is 308+1
^  Call: (553) [user] count_lines_in_stream(2000, (0x55aefe498890), 309, _5680)
^  Unify: (553) [user] count_lines_in_stream(2000, (0x55aefe498890), 309, _5680)
   Call: (554) [system] 309>=2000
^  Redo: (553) [user] count_lines_in_stream(2000, (0x55aefe498890), 309, _5680)
   Call: (554) [read_util] read_util:read_line_to_codes((0x55aefe498890), _497026)
   Exit: (554) [read_util] read_util:read_line_to_codes((0x55aefe498890), end_of_file)
   Call: (554) [system] end_of_file==end_of_file
   Exit: (554) [system] end_of_file==end_of_file
   Call: (554) [system] _5680=309
   Exit: (554) [system] 309=309
^  Exit: (553) [user] count_lines_in_stream(2000, (0x55aefe498890), 309, 309)
^  Exit: (552) [user] count_lines_in_stream(2000, (0x55aefe498890), 308, 309)
^  Exit: (551) [user] count_lines_in_stream(2000, (0x55aefe498890), 307, 309)
^  Exit: (550) [user] count_lines_in_stream(2000, (0x55aefe498890), 306, 309)
^  Exit: (549) [user] count_lines_in_stream(2000, (0x55aefe498890), 305, 309)
^  Exit: (548) [user] count_lines_in_stream(2000, (0x55aefe498890), 304, 309)
^  Exit: (547) [user] count_lines_in_stream(2000, (0x55aefe498890), 303, 309)
^  Exit: (546) [user] count_lines_in_stream(2000, (0x55aefe498890), 302, 309)
^  Exit: (545) [user] count_lines_in_stream(2000, (0x55aefe498890), 301, 309)
^  Exit: (544) [user] count_lines_in_stream(2000, (0x55aefe498890), 300, 309)
^  Exit: (543) [user] count_lines_in_stream(2000, (0x55aefe498890), 299, 309)
^  Exit: (542) [user] count_lines_in_stream(2000, (0x55aefe498890), 298, 309)
^  Exit: (541) [user] count_lines_in_stream(2000, (0x55aefe498890), 297, 309)
^  Exit: (540) [user] count_lines_in_stream(2000, (0x55aefe498890), 296, 309)
^  Exit: (539) [user] count_lines_in_stream(2000, (0x55aefe498890), 295, 309)
^  Exit: (538) [user] count_lines_in_stream(2000, (0x55aefe498890), 294, 309)
^  Exit: (537) [user] count_lines_in_stream(2000, (0x55aefe498890), 293, 309)
^  Exit: (536) [user] count_lines_in_stream(2000, (0x55aefe498890), 292, 309)
^  Exit: (535) [user] count_lines_in_stream(2000, (0x55aefe498890), 291, 309)
^  Exit: (534) [user] count_lines_in_stream(2000, (0x55aefe498890), 290, 309)
^  Exit: (533) [user] count_lines_in_stream(2000, (0x55aefe498890), 289, 309)
^  Exit: (532) [user] count_lines_in_stream(2000, (0x55aefe498890), 288, 309)
^  Exit: (531) [user] count_lines_in_stream(2000, (0x55aefe498890), 287, 309)
^  Exit: (530) [user] count_lines_in_stream(2000, (0x55aefe498890), 286, 309)
^  Exit: (529) [user] count_lines_in_stream(2000, (0x55aefe498890), 285, 309)
^  Exit: (528) [user] count_lines_in_stream(2000, (0x55aefe498890), 284, 309)
^  Exit: (527) [user] count_lines_in_stream(2000, (0x55aefe498890), 283, 309)
^  Exit: (526) [user] count_lines_in_stream(2000, (0x55aefe498890), 282, 309)
^  Exit: (525) [user] count_lines_in_stream(2000, (0x55aefe498890), 281, 309)
^  Exit: (524) [user] count_lines_in_stream(2000, (0x55aefe498890), 280, 309)
^  Exit: (523) [user] count_lines_in_stream(2000, (0x55aefe498890), 279, 309)
^  Exit: (522) [user] count_lines_in_stream(2000, (0x55aefe498890), 278, 309)
^  Exit: (521) [user] count_lines_in_stream(2000, (0x55aefe498890), 277, 309)
^  Exit: (520) [user] count_lines_in_stream(2000, (0x55aefe498890), 276, 309)
^  Exit: (519) [user] count_lines_in_stream(2000, (0x55aefe498890), 275, 309)
^  Exit: (518) [user] count_lines_in_stream(2000, (0x55aefe498890), 274, 309)
^  Exit: (517) [user] count_lines_in_stream(2000, (0x55aefe498890), 273, 309)
^  Exit: (516) [user] count_lines_in_stream(2000, (0x55aefe498890), 272, 309)
^  Exit: (515) [user] count_lines_in_stream(2000, (0x55aefe498890), 271, 309)
^  Exit: (514) [user] count_lines_in_stream(2000, (0x55aefe498890), 270, 309)
^  Exit: (513) [user] count_lines_in_stream(2000, (0x55aefe498890), 269, 309)
^  Exit: (512) [user] count_lines_in_stream(2000, (0x55aefe498890), 268, 309)
^  Exit: (511) [user] count_lines_in_stream(2000, (0x55aefe498890), 267, 309)
^  Exit: (510) [user] count_lines_in_stream(2000, (0x55aefe498890), 266, 309)
^  Exit: (509) [user] count_lines_in_stream(2000, (0x55aefe498890), 265, 309)
^  Exit: (508) [user] count_lines_in_stream(2000, (0x55aefe498890), 264, 309)
^  Exit: (507) [user] count_lines_in_stream(2000, (0x55aefe498890), 263, 309)
^  Exit: (506) [user] count_lines_in_stream(2000, (0x55aefe498890), 262, 309)
^  Exit: (505) [user] count_lines_in_stream(2000, (0x55aefe498890), 261, 309)
^  Exit: (504) [user] count_lines_in_stream(2000, (0x55aefe498890), 260, 309)
^  Exit: (503) [user] count_lines_in_stream(2000, (0x55aefe498890), 259, 309)
^  Exit: (502) [user] count_lines_in_stream(2000, (0x55aefe498890), 258, 309)
^  Exit: (501) [user] count_lines_in_stream(2000, (0x55aefe498890), 257, 309)
^  Exit: (500) [user] count_lines_in_stream(2000, (0x55aefe498890), 256, 309)
^  Exit: (499) [user] count_lines_in_stream(2000, (0x55aefe498890), 255, 309)
^  Exit: (498) [user] count_lines_in_stream(2000, (0x55aefe498890), 254, 309)
^  Exit: (497) [user] count_lines_in_stream(2000, (0x55aefe498890), 253, 309)
^  Exit: (496) [user] count_lines_in_stream(2000, (0x55aefe498890), 252, 309)
^  Exit: (495) [user] count_lines_in_stream(2000, (0x55aefe498890), 251, 309)
^  Exit: (494) [user] count_lines_in_stream(2000, (0x55aefe498890), 250, 309)
^  Exit: (493) [user] count_lines_in_stream(2000, (0x55aefe498890), 249, 309)
^  Exit: (492) [user] count_lines_in_stream(2000, (0x55aefe498890), 248, 309)
^  Exit: (491) [user] count_lines_in_stream(2000, (0x55aefe498890), 247, 309)
^  Exit: (490) [user] count_lines_in_stream(2000, (0x55aefe498890), 246, 309)
^  Exit: (489) [user] count_lines_in_stream(2000, (0x55aefe498890), 245, 309)
^  Exit: (488) [user] count_lines_in_stream(2000, (0x55aefe498890), 244, 309)
^  Exit: (487) [user] count_lines_in_stream(2000, (0x55aefe498890), 243, 309)
^  Exit: (486) [user] count_lines_in_stream(2000, (0x55aefe498890), 242, 309)
^  Exit: (485) [user] count_lines_in_stream(2000, (0x55aefe498890), 241, 309)
^  Exit: (484) [user] count_lines_in_stream(2000, (0x55aefe498890), 240, 309)
^  Exit: (483) [user] count_lines_in_stream(2000, (0x55aefe498890), 239, 309)
^  Exit: (482) [user] count_lines_in_stream(2000, (0x55aefe498890), 238, 309)
^  Exit: (481) [user] count_lines_in_stream(2000, (0x55aefe498890), 237, 309)
^  Exit: (480) [user] count_lines_in_stream(2000, (0x55aefe498890), 236, 309)
^  Exit: (479) [user] count_lines_in_stream(2000, (0x55aefe498890), 235, 309)
^  Exit: (478) [user] count_lines_in_stream(2000, (0x55aefe498890), 234, 309)
^  Exit: (477) [user] count_lines_in_stream(2000, (0x55aefe498890), 233, 309)
^  Exit: (476) [user] count_lines_in_stream(2000, (0x55aefe498890), 232, 309)
^  Exit: (475) [user] count_lines_in_stream(2000, (0x55aefe498890), 231, 309)
^  Exit: (474) [user] count_lines_in_stream(2000, (0x55aefe498890), 230, 309)
^  Exit: (473) [user] count_lines_in_stream(2000, (0x55aefe498890), 229, 309)
^  Exit: (472) [user] count_lines_in_stream(2000, (0x55aefe498890), 228, 309)
^  Exit: (471) [user] count_lines_in_stream(2000, (0x55aefe498890), 227, 309)
^  Exit: (470) [user] count_lines_in_stream(2000, (0x55aefe498890), 226, 309)
^  Exit: (469) [user] count_lines_in_stream(2000, (0x55aefe498890), 225, 309)
^  Exit: (468) [user] count_lines_in_stream(2000, (0x55aefe498890), 224, 309)
^  Exit: (467) [user] count_lines_in_stream(2000, (0x55aefe498890), 223, 309)
^  Exit: (466) [user] count_lines_in_stream(2000, (0x55aefe498890), 222, 309)
^  Exit: (465) [user] count_lines_in_stream(2000, (0x55aefe498890), 221, 309)
^  Exit: (464) [user] count_lines_in_stream(2000, (0x55aefe498890), 220, 309)
^  Exit: (463) [user] count_lines_in_stream(2000, (0x55aefe498890), 219, 309)
^  Exit: (462) [user] count_lines_in_stream(2000, (0x55aefe498890), 218, 309)
^  Exit: (461) [user] count_lines_in_stream(2000, (0x55aefe498890), 217, 309)
^  Exit: (460) [user] count_lines_in_stream(2000, (0x55aefe498890), 216, 309)
^  Exit: (459) [user] count_lines_in_stream(2000, (0x55aefe498890), 215, 309)
^  Exit: (458) [user] count_lines_in_stream(2000, (0x55aefe498890), 214, 309)
^  Exit: (457) [user] count_lines_in_stream(2000, (0x55aefe498890), 213, 309)
^  Exit: (456) [user] count_lines_in_stream(2000, (0x55aefe498890), 212, 309)
^  Exit: (455) [user] count_lines_in_stream(2000, (0x55aefe498890), 211, 309)
^  Exit: (454) [user] count_lines_in_stream(2000, (0x55aefe498890), 210, 309)
^  Exit: (453) [user] count_lines_in_stream(2000, (0x55aefe498890), 209, 309)
^  Exit: (452) [user] count_lines_in_stream(2000, (0x55aefe498890), 208, 309)
^  Exit: (451) [user] count_lines_in_stream(2000, (0x55aefe498890), 207, 309)
^  Exit: (450) [user] count_lines_in_stream(2000, (0x55aefe498890), 206, 309)
^  Exit: (449) [user] count_lines_in_stream(2000, (0x55aefe498890), 205, 309)
^  Exit: (448) [user] count_lines_in_stream(2000, (0x55aefe498890), 204, 309)
^  Exit: (447) [user] count_lines_in_stream(2000, (0x55aefe498890), 203, 309)
^  Exit: (446) [user] count_lines_in_stream(2000, (0x55aefe498890), 202, 309)
^  Exit: (445) [user] count_lines_in_stream(2000, (0x55aefe498890), 201, 309)
^  Exit: (444) [user] count_lines_in_stream(2000, (0x55aefe498890), 200, 309)
^  Exit: (443) [user] count_lines_in_stream(2000, (0x55aefe498890), 199, 309)
^  Exit: (442) [user] count_lines_in_stream(2000, (0x55aefe498890), 198, 309)
^  Exit: (441) [user] count_lines_in_stream(2000, (0x55aefe498890), 197, 309)
^  Exit: (440) [user] count_lines_in_stream(2000, (0x55aefe498890), 196, 309)
^  Exit: (439) [user] count_lines_in_stream(2000, (0x55aefe498890), 195, 309)
^  Exit: (438) [user] count_lines_in_stream(2000, (0x55aefe498890), 194, 309)
^  Exit: (437) [user] count_lines_in_stream(2000, (0x55aefe498890), 193, 309)
^  Exit: (436) [user] count_lines_in_stream(2000, (0x55aefe498890), 192, 309)
^  Exit: (435) [user] count_lines_in_stream(2000, (0x55aefe498890), 191, 309)
^  Exit: (434) [user] count_lines_in_stream(2000, (0x55aefe498890), 190, 309)
^  Exit: (433) [user] count_lines_in_stream(2000, (0x55aefe498890), 189, 309)
^  Exit: (432) [user] count_lines_in_stream(2000, (0x55aefe498890), 188, 309)
^  Exit: (431) [user] count_lines_in_stream(2000, (0x55aefe498890), 187, 309)
^  Exit: (430) [user] count_lines_in_stream(2000, (0x55aefe498890), 186, 309)
^  Exit: (429) [user] count_lines_in_stream(2000, (0x55aefe498890), 185, 309)
^  Exit: (428) [user] count_lines_in_stream(2000, (0x55aefe498890), 184, 309)
^  Exit: (427) [user] count_lines_in_stream(2000, (0x55aefe498890), 183, 309)
^  Exit: (426) [user] count_lines_in_stream(2000, (0x55aefe498890), 182, 309)
^  Exit: (425) [user] count_lines_in_stream(2000, (0x55aefe498890), 181, 309)
^  Exit: (424) [user] count_lines_in_stream(2000, (0x55aefe498890), 180, 309)
^  Exit: (423) [user] count_lines_in_stream(2000, (0x55aefe498890), 179, 309)
^  Exit: (422) [user] count_lines_in_stream(2000, (0x55aefe498890), 178, 309)
^  Exit: (421) [user] count_lines_in_stream(2000, (0x55aefe498890), 177, 309)
^  Exit: (420) [user] count_lines_in_stream(2000, (0x55aefe498890), 176, 309)
^  Exit: (419) [user] count_lines_in_stream(2000, (0x55aefe498890), 175, 309)
^  Exit: (418) [user] count_lines_in_stream(2000, (0x55aefe498890), 174, 309)
^  Exit: (417) [user] count_lines_in_stream(2000, (0x55aefe498890), 173, 309)
^  Exit: (416) [user] count_lines_in_stream(2000, (0x55aefe498890), 172, 309)
^  Exit: (415) [user] count_lines_in_stream(2000, (0x55aefe498890), 171, 309)
^  Exit: (414) [user] count_lines_in_stream(2000, (0x55aefe498890), 170, 309)
^  Exit: (413) [user] count_lines_in_stream(2000, (0x55aefe498890), 169, 309)
^  Exit: (412) [user] count_lines_in_stream(2000, (0x55aefe498890), 168, 309)
^  Exit: (411) [user] count_lines_in_stream(2000, (0x55aefe498890), 167, 309)
^  Exit: (410) [user] count_lines_in_stream(2000, (0x55aefe498890), 166, 309)
^  Exit: (409) [user] count_lines_in_stream(2000, (0x55aefe498890), 165, 309)
^  Exit: (408) [user] count_lines_in_stream(2000, (0x55aefe498890), 164, 309)
^  Exit: (407) [user] count_lines_in_stream(2000, (0x55aefe498890), 163, 309)
^  Exit: (406) [user] count_lines_in_stream(2000, (0x55aefe498890), 162, 309)
^  Exit: (405) [user] count_lines_in_stream(2000, (0x55aefe498890), 161, 309)
^  Exit: (404) [user] count_lines_in_stream(2000, (0x55aefe498890), 160, 309)
^  Exit: (403) [user] count_lines_in_stream(2000, (0x55aefe498890), 159, 309)
^  Exit: (402) [user] count_lines_in_stream(2000, (0x55aefe498890), 158, 309)
^  Exit: (401) [user] count_lines_in_stream(2000, (0x55aefe498890), 157, 309)
^  Exit: (400) [user] count_lines_in_stream(2000, (0x55aefe498890), 156, 309)
^  Exit: (399) [user] count_lines_in_stream(2000, (0x55aefe498890), 155, 309)
^  Exit: (398) [user] count_lines_in_stream(2000, (0x55aefe498890), 154, 309)
^  Exit: (397) [user] count_lines_in_stream(2000, (0x55aefe498890), 153, 309)
^  Exit: (396) [user] count_lines_in_stream(2000, (0x55aefe498890), 152, 309)
^  Exit: (395) [user] count_lines_in_stream(2000, (0x55aefe498890), 151, 309)
^  Exit: (394) [user] count_lines_in_stream(2000, (0x55aefe498890), 150, 309)
^  Exit: (393) [user] count_lines_in_stream(2000, (0x55aefe498890), 149, 309)
^  Exit: (392) [user] count_lines_in_stream(2000, (0x55aefe498890), 148, 309)
^  Exit: (391) [user] count_lines_in_stream(2000, (0x55aefe498890), 147, 309)
^  Exit: (390) [user] count_lines_in_stream(2000, (0x55aefe498890), 146, 309)
^  Exit: (389) [user] count_lines_in_stream(2000, (0x55aefe498890), 145, 309)
^  Exit: (388) [user] count_lines_in_stream(2000, (0x55aefe498890), 144, 309)
^  Exit: (387) [user] count_lines_in_stream(2000, (0x55aefe498890), 143, 309)
^  Exit: (386) [user] count_lines_in_stream(2000, (0x55aefe498890), 142, 309)
^  Exit: (385) [user] count_lines_in_stream(2000, (0x55aefe498890), 141, 309)
^  Exit: (384) [user] count_lines_in_stream(2000, (0x55aefe498890), 140, 309)
^  Exit: (383) [user] count_lines_in_stream(2000, (0x55aefe498890), 139, 309)
^  Exit: (382) [user] count_lines_in_stream(2000, (0x55aefe498890), 138, 309)
^  Exit: (381) [user] count_lines_in_stream(2000, (0x55aefe498890), 137, 309)
^  Exit: (380) [user] count_lines_in_stream(2000, (0x55aefe498890), 136, 309)
^  Exit: (379) [user] count_lines_in_stream(2000, (0x55aefe498890), 135, 309)
^  Exit: (378) [user] count_lines_in_stream(2000, (0x55aefe498890), 134, 309)
^  Exit: (377) [user] count_lines_in_stream(2000, (0x55aefe498890), 133, 309)
^  Exit: (376) [user] count_lines_in_stream(2000, (0x55aefe498890), 132, 309)
^  Exit: (375) [user] count_lines_in_stream(2000, (0x55aefe498890), 131, 309)
^  Exit: (374) [user] count_lines_in_stream(2000, (0x55aefe498890), 130, 309)
^  Exit: (373) [user] count_lines_in_stream(2000, (0x55aefe498890), 129, 309)
^  Exit: (372) [user] count_lines_in_stream(2000, (0x55aefe498890), 128, 309)
^  Exit: (371) [user] count_lines_in_stream(2000, (0x55aefe498890), 127, 309)
^  Exit: (370) [user] count_lines_in_stream(2000, (0x55aefe498890), 126, 309)
^  Exit: (369) [user] count_lines_in_stream(2000, (0x55aefe498890), 125, 309)
^  Exit: (368) [user] count_lines_in_stream(2000, (0x55aefe498890), 124, 309)
^  Exit: (367) [user] count_lines_in_stream(2000, (0x55aefe498890), 123, 309)
^  Exit: (366) [user] count_lines_in_stream(2000, (0x55aefe498890), 122, 309)
^  Exit: (365) [user] count_lines_in_stream(2000, (0x55aefe498890), 121, 309)
^  Exit: (364) [user] count_lines_in_stream(2000, (0x55aefe498890), 120, 309)
^  Exit: (363) [user] count_lines_in_stream(2000, (0x55aefe498890), 119, 309)
^  Exit: (362) [user] count_lines_in_stream(2000, (0x55aefe498890), 118, 309)
^  Exit: (361) [user] count_lines_in_stream(2000, (0x55aefe498890), 117, 309)
^  Exit: (360) [user] count_lines_in_stream(2000, (0x55aefe498890), 116, 309)
^  Exit: (359) [user] count_lines_in_stream(2000, (0x55aefe498890), 115, 309)
^  Exit: (358) [user] count_lines_in_stream(2000, (0x55aefe498890), 114, 309)
^  Exit: (357) [user] count_lines_in_stream(2000, (0x55aefe498890), 113, 309)
^  Exit: (356) [user] count_lines_in_stream(2000, (0x55aefe498890), 112, 309)
^  Exit: (355) [user] count_lines_in_stream(2000, (0x55aefe498890), 111, 309)
^  Exit: (354) [user] count_lines_in_stream(2000, (0x55aefe498890), 110, 309)
^  Exit: (353) [user] count_lines_in_stream(2000, (0x55aefe498890), 109, 309)
^  Exit: (352) [user] count_lines_in_stream(2000, (0x55aefe498890), 108, 309)
^  Exit: (351) [user] count_lines_in_stream(2000, (0x55aefe498890), 107, 309)
^  Exit: (350) [user] count_lines_in_stream(2000, (0x55aefe498890), 106, 309)
^  Exit: (349) [user] count_lines_in_stream(2000, (0x55aefe498890), 105, 309)
^  Exit: (348) [user] count_lines_in_stream(2000, (0x55aefe498890), 104, 309)
^  Exit: (347) [user] count_lines_in_stream(2000, (0x55aefe498890), 103, 309)
^  Exit: (346) [user] count_lines_in_stream(2000, (0x55aefe498890), 102, 309)
^  Exit: (345) [user] count_lines_in_stream(2000, (0x55aefe498890), 101, 309)
^  Exit: (344) [user] count_lines_in_stream(2000, (0x55aefe498890), 100, 309)
^  Exit: (343) [user] count_lines_in_stream(2000, (0x55aefe498890), 99, 309)
^  Exit: (342) [user] count_lines_in_stream(2000, (0x55aefe498890), 98, 309)
^  Exit: (341) [user] count_lines_in_stream(2000, (0x55aefe498890), 97, 309)
^  Exit: (340) [user] count_lines_in_stream(2000, (0x55aefe498890), 96, 309)
^  Exit: (339) [user] count_lines_in_stream(2000, (0x55aefe498890), 95, 309)
^  Exit: (338) [user] count_lines_in_stream(2000, (0x55aefe498890), 94, 309)
^  Exit: (337) [user] count_lines_in_stream(2000, (0x55aefe498890), 93, 309)
^  Exit: (336) [user] count_lines_in_stream(2000, (0x55aefe498890), 92, 309)
^  Exit: (335) [user] count_lines_in_stream(2000, (0x55aefe498890), 91, 309)
^  Exit: (334) [user] count_lines_in_stream(2000, (0x55aefe498890), 90, 309)
^  Exit: (333) [user] count_lines_in_stream(2000, (0x55aefe498890), 89, 309)
^  Exit: (332) [user] count_lines_in_stream(2000, (0x55aefe498890), 88, 309)
^  Exit: (331) [user] count_lines_in_stream(2000, (0x55aefe498890), 87, 309)
^  Exit: (330) [user] count_lines_in_stream(2000, (0x55aefe498890), 86, 309)
^  Exit: (329) [user] count_lines_in_stream(2000, (0x55aefe498890), 85, 309)
^  Exit: (328) [user] count_lines_in_stream(2000, (0x55aefe498890), 84, 309)
^  Exit: (327) [user] count_lines_in_stream(2000, (0x55aefe498890), 83, 309)
^  Exit: (326) [user] count_lines_in_stream(2000, (0x55aefe498890), 82, 309)
^  Exit: (325) [user] count_lines_in_stream(2000, (0x55aefe498890), 81, 309)
^  Exit: (324) [user] count_lines_in_stream(2000, (0x55aefe498890), 80, 309)
^  Exit: (323) [user] count_lines_in_stream(2000, (0x55aefe498890), 79, 309)
^  Exit: (322) [user] count_lines_in_stream(2000, (0x55aefe498890), 78, 309)
^  Exit: (321) [user] count_lines_in_stream(2000, (0x55aefe498890), 77, 309)
^  Exit: (320) [user] count_lines_in_stream(2000, (0x55aefe498890), 76, 309)
^  Exit: (319) [user] count_lines_in_stream(2000, (0x55aefe498890), 75, 309)
^  Exit: (318) [user] count_lines_in_stream(2000, (0x55aefe498890), 74, 309)
^  Exit: (317) [user] count_lines_in_stream(2000, (0x55aefe498890), 73, 309)
^  Exit: (316) [user] count_lines_in_stream(2000, (0x55aefe498890), 72, 309)
^  Exit: (315) [user] count_lines_in_stream(2000, (0x55aefe498890), 71, 309)
^  Exit: (314) [user] count_lines_in_stream(2000, (0x55aefe498890), 70, 309)
^  Exit: (313) [user] count_lines_in_stream(2000, (0x55aefe498890), 69, 309)
^  Exit: (312) [user] count_lines_in_stream(2000, (0x55aefe498890), 68, 309)
^  Exit: (311) [user] count_lines_in_stream(2000, (0x55aefe498890), 67, 309)
^  Exit: (310) [user] count_lines_in_stream(2000, (0x55aefe498890), 66, 309)
^  Exit: (309) [user] count_lines_in_stream(2000, (0x55aefe498890), 65, 309)
^  Exit: (308) [user] count_lines_in_stream(2000, (0x55aefe498890), 64, 309)
^  Exit: (307) [user] count_lines_in_stream(2000, (0x55aefe498890), 63, 309)
^  Exit: (306) [user] count_lines_in_stream(2000, (0x55aefe498890), 62, 309)
^  Exit: (305) [user] count_lines_in_stream(2000, (0x55aefe498890), 61, 309)
^  Exit: (304) [user] count_lines_in_stream(2000, (0x55aefe498890), 60, 309)
^  Exit: (303) [user] count_lines_in_stream(2000, (0x55aefe498890), 59, 309)
^  Exit: (302) [user] count_lines_in_stream(2000, (0x55aefe498890), 58, 309)
^  Exit: (301) [user] count_lines_in_stream(2000, (0x55aefe498890), 57, 309)
^  Exit: (300) [user] count_lines_in_stream(2000, (0x55aefe498890), 56, 309)
^  Exit: (299) [user] count_lines_in_stream(2000, (0x55aefe498890), 55, 309)
^  Exit: (298) [user] count_lines_in_stream(2000, (0x55aefe498890), 54, 309)
^  Exit: (297) [user] count_lines_in_stream(2000, (0x55aefe498890), 53, 309)
^  Exit: (296) [user] count_lines_in_stream(2000, (0x55aefe498890), 52, 309)
^  Exit: (295) [user] count_lines_in_stream(2000, (0x55aefe498890), 51, 309)
^  Exit: (294) [user] count_lines_in_stream(2000, (0x55aefe498890), 50, 309)
^  Exit: (293) [user] count_lines_in_stream(2000, (0x55aefe498890), 49, 309)
^  Exit: (292) [user] count_lines_in_stream(2000, (0x55aefe498890), 48, 309)
^  Exit: (291) [user] count_lines_in_stream(2000, (0x55aefe498890), 47, 309)
^  Exit: (290) [user] count_lines_in_stream(2000, (0x55aefe498890), 46, 309)
^  Exit: (289) [user] count_lines_in_stream(2000, (0x55aefe498890), 45, 309)
^  Exit: (288) [user] count_lines_in_stream(2000, (0x55aefe498890), 44, 309)
^  Exit: (287) [user] count_lines_in_stream(2000, (0x55aefe498890), 43, 309)
^  Exit: (286) [user] count_lines_in_stream(2000, (0x55aefe498890), 42, 309)
^  Exit: (285) [user] count_lines_in_stream(2000, (0x55aefe498890), 41, 309)
^  Exit: (284) [user] count_lines_in_stream(2000, (0x55aefe498890), 40, 309)
^  Exit: (283) [user] count_lines_in_stream(2000, (0x55aefe498890), 39, 309)
^  Exit: (282) [user] count_lines_in_stream(2000, (0x55aefe498890), 38, 309)
^  Exit: (281) [user] count_lines_in_stream(2000, (0x55aefe498890), 37, 309)
^  Exit: (280) [user] count_lines_in_stream(2000, (0x55aefe498890), 36, 309)
^  Exit: (279) [user] count_lines_in_stream(2000, (0x55aefe498890), 35, 309)
^  Exit: (278) [user] count_lines_in_stream(2000, (0x55aefe498890), 34, 309)
^  Exit: (277) [user] count_lines_in_stream(2000, (0x55aefe498890), 33, 309)
^  Exit: (276) [user] count_lines_in_stream(2000, (0x55aefe498890), 32, 309)
^  Exit: (275) [user] count_lines_in_stream(2000, (0x55aefe498890), 31, 309)
^  Exit: (274) [user] count_lines_in_stream(2000, (0x55aefe498890), 30, 309)
^  Exit: (273) [user] count_lines_in_stream(2000, (0x55aefe498890), 29, 309)
^  Exit: (272) [user] count_lines_in_stream(2000, (0x55aefe498890), 28, 309)
^  Exit: (271) [user] count_lines_in_stream(2000, (0x55aefe498890), 27, 309)
^  Exit: (270) [user] count_lines_in_stream(2000, (0x55aefe498890), 26, 309)
^  Exit: (269) [user] count_lines_in_stream(2000, (0x55aefe498890), 25, 309)
^  Exit: (268) [user] count_lines_in_stream(2000, (0x55aefe498890), 24, 309)
^  Exit: (267) [user] count_lines_in_stream(2000, (0x55aefe498890), 23, 309)
^  Exit: (266) [user] count_lines_in_stream(2000, (0x55aefe498890), 22, 309)
^  Exit: (265) [user] count_lines_in_stream(2000, (0x55aefe498890), 21, 309)
^  Exit: (264) [user] count_lines_in_stream(2000, (0x55aefe498890), 20, 309)
^  Exit: (263) [user] count_lines_in_stream(2000, (0x55aefe498890), 19, 309)
^  Exit: (262) [user] count_lines_in_stream(2000, (0x55aefe498890), 18, 309)
^  Exit: (261) [user] count_lines_in_stream(2000, (0x55aefe498890), 17, 309)
^  Exit: (260) [user] count_lines_in_stream(2000, (0x55aefe498890), 16, 309)
^  Exit: (259) [user] count_lines_in_stream(2000, (0x55aefe498890), 15, 309)
^  Exit: (258) [user] count_lines_in_stream(2000, (0x55aefe498890), 14, 309)
^  Exit: (257) [user] count_lines_in_stream(2000, (0x55aefe498890), 13, 309)
^  Exit: (256) [user] count_lines_in_stream(2000, (0x55aefe498890), 12, 309)
^  Exit: (255) [user] count_lines_in_stream(2000, (0x55aefe498890), 11, 309)
^  Exit: (254) [user] count_lines_in_stream(2000, (0x55aefe498890), 10, 309)
^  Exit: (253) [user] count_lines_in_stream(2000, (0x55aefe498890), 9, 309)
^  Exit: (252) [user] count_lines_in_stream(2000, (0x55aefe498890), 8, 309)
^  Exit: (251) [user] count_lines_in_stream(2000, (0x55aefe498890), 7, 309)
^  Exit: (250) [user] count_lines_in_stream(2000, (0x55aefe498890), 6, 309)
^  Exit: (249) [user] count_lines_in_stream(2000, (0x55aefe498890), 5, 309)
^  Exit: (248) [user] count_lines_in_stream(2000, (0x55aefe498890), 4, 309)
^  Exit: (247) [user] count_lines_in_stream(2000, (0x55aefe498890), 3, 309)
^  Exit: (246) [user] count_lines_in_stream(2000, (0x55aefe498890), 2, 309)
^  Exit: (245) [user] count_lines_in_stream(2000, (0x55aefe498890), 1, 309)
^  Exit: (244) [user] count_lines_in_stream(2000, (0x55aefe498890), 0, 309)
   Call: (244) [system] close((0x55aefe498890))
   Exit: (244) [system] close((0x55aefe498890))
^  Exit: (243) [user] count_lines_up_to(2000, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 309)
   Call: (243) [system] 309>1980
^  Redo: (242) [user] include_metta_directory_file('&corelib', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Unify: (242) [user] include_metta_directory_file('&corelib', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (243) [user] with_cwd('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', must_det_ll(setup_call_cleanup(open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', read, _360936, [encoding(utf8)]), must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', _360936)), close(_360936))))
^  Unify: (243) [user] with_cwd('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', must_det_ll(setup_call_cleanup(open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', read, _360936, [encoding(utf8)]), must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', _360936)), close(_360936))))
   Call: (244) [system] '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'==('.')
   Fail: (244) [system] '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'==('.')
^  Redo: (243) [user] with_cwd('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', must_det_ll(setup_call_cleanup(open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', read, _360936, [encoding(utf8)]), must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', _360936)), close(_360936))))
^  Unify: (243) [user] with_cwd('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', must_det_ll(setup_call_cleanup(open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', read, _360936, [encoding(utf8)]), must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', _360936)), close(_360936))))
   Call: (244) [system] var('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
   Fail: (244) [system] var('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
^  Redo: (243) [user] with_cwd('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', must_det_ll(setup_call_cleanup(open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', read, _360936, [encoding(utf8)]), must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', _360936)), close(_360936))))
^  Unify: (243) [user] with_cwd('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', must_det_ll(setup_call_cleanup(open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', read, _360936, [encoding(utf8)]), must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', _360936)), close(_360936))))
   Call: (244) [system] exists_directory('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
   Exit: (244) [system] exists_directory('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
^  Unify: (243) [user] with_cwd('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta', must_det_ll(setup_call_cleanup(open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', read, _360936, [encoding(utf8)]), must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', _360936)), close(_360936))))
^  Call: (244) [user] setup_call_cleanup(working_directory(_427588, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), must_det_ll(setup_call_cleanup(open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', read, _360936, [encoding(utf8)]), must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', _360936)), close(_360936))), working_directory(_427594, _427588))
^  Unify: (244) [system] setup_call_cleanup(user:working_directory(_427588, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'), user:must_det_ll(setup_call_cleanup(open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', read, _360936, [encoding(utf8)]), must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', _360936)), close(_360936))), user:working_directory(_427594, _427588))
^  Call: (245) [system] sig_atomic(user:working_directory(_427588, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
   Call: (247) [$syspreds] working_directory(_427588, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
   Unify: (247) [$syspreds] working_directory(_427588, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
   Call: (248) [system] '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/'=='/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'
   Redo: (247) [$syspreds] working_directory('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
   Exit: (247) [$syspreds] working_directory('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta')
^  Exit: (245) [system] sig_atomic(user:working_directory('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta'))
^  Call: (245) [user] must_det_ll(setup_call_cleanup(open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', read, _360936, [encoding(utf8)]), must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', _360936)), close(_360936)))
^  Unify: (245) [user] must_det_ll(user:setup_call_cleanup(open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', read, _360936, [encoding(utf8)]), must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', _360936)), close(_360936)))
^  Call: (246) [user] once(user:setup_call_cleanup(open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', read, _360936, [encoding(utf8)]), must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', _360936)), close(_360936)))
^  Unify: (246) [system] once(user:setup_call_cleanup(open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', read, _360936, [encoding(utf8)]), must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', _360936)), close(_360936)))
^  Call: (247) [user] setup_call_cleanup(open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', read, _360936, [encoding(utf8)]), must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', _360936)), close(_360936))
^  Unify: (247) [system] setup_call_cleanup(user:open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', read, _360936, [encoding(utf8)]), user:must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', _360936)), user:close(_360936))
^  Call: (248) [system] sig_atomic(user:open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', read, _360936, [encoding(utf8)]))
   Call: (250) [system] open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', read, _360936, [encoding(utf8)])
   Exit: (250) [system] open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', read, (0x55aefe44e2f0), [encoding(utf8)])
^  Exit: (248) [system] sig_atomic(user:open(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', read, (0x55aefe44e2f0), [encoding(utf8)]))
^  Call: (248) [user] must_det_ll(load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', (0x55aefe44e2f0)))
^  Unify: (248) [user] must_det_ll(user:load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', (0x55aefe44e2f0)))
^  Call: (249) [user] once(user:load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', (0x55aefe44e2f0)))
^  Unify: (249) [system] once(user:load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', (0x55aefe44e2f0)))
^  Call: (250) [user] load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', (0x55aefe44e2f0))
^  Unify: (250) [user] load_metta_file_stream(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', (0x55aefe44e2f0))
^  Call: (251) [user] if_t((atomic(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), exists_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')), size_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _35654))
^  Unify: (251) [user] if_t((atomic(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), exists_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')), size_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _35654))
   Call: (253) [system] atomic(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (253) [system] atomic(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (253) [system] exists_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (253) [system] exists_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (252) [system] size_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _35654)
   Exit: (252) [system] size_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 12345)
^  Exit: (251) [user] if_t((atomic(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), exists_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')), size_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 12345))
^  Call: (251) [user] if_t(var(12345), is_file_stream_and_size((0x55aefe44e2f0), 12345))
^  Unify: (251) [user] if_t(var(12345), is_file_stream_and_size((0x55aefe44e2f0), 12345))
   Call: (252) [system] var(12345)
   Fail: (252) [system] var(12345)
^  Redo: (251) [user] if_t(var(12345), is_file_stream_and_size((0x55aefe44e2f0), 12345))
^  Exit: (251) [user] if_t(var(12345), is_file_stream_and_size((0x55aefe44e2f0), 12345))
   Call: (251) [system] _108032=read_metta2
   Exit: (251) [system] read_metta2=read_metta2
^  Call: (251) [user] with_option(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', ((must_det_ll(set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1)), must_det_ll(load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')), must_det_ll(set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 0))), must_det_ll(load_metta_file_stream_fast(12345, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', (0x55aefe44e2f0)))))
^  Unify: (251) [user] with_option(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', ((must_det_ll(set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1)), must_det_ll(load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')), must_det_ll(set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 0))), must_det_ll(load_metta_file_stream_fast(12345, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', (0x55aefe44e2f0)))))
^  Call: (252) [user] was_option_value(loading_file, _150796)
^  Unify: (252) [user] was_option_value(loading_file, _150796)
   Call: (253) [system] current_prolog_flag(loading_file, _152654)
   Exit: (253) [system] current_prolog_flag(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
   Call: (253) [system] _150796=P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'
   Exit: (253) [system] P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'=P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'
^  Exit: (252) [user] was_option_value(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta')
^  Call: (252) [user] setup_call_cleanup(set_option_value(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), ((must_det_ll(set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1)), must_det_ll(load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')), must_det_ll(set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 0))), must_det_ll(load_metta_file_stream_fast(12345, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', (0x55aefe44e2f0)))), set_option_value(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Unify: (252) [system] setup_call_cleanup(user:set_option_value(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), user:((must_det_ll(set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1)), must_det_ll(load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')), must_det_ll(set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 0))), must_det_ll(load_metta_file_stream_fast(12345, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', (0x55aefe44e2f0)))), user:set_option_value(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta'))
^  Call: (253) [system] sig_atomic(user:set_option_value(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (255) [user] set_option_value(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Unify: (255) [user] set_option_value(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (256) [user] set_option_value0(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Unify: (256) [user] set_option_value0(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (257) [user] p2mE(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _249628)
^  Unify: (257) [user] p2mE(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (258) [system] atom(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (258) [system] atom(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Unify: (257) [user] p2mE(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Exit: (257) [user] p2mE(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (258) [$syspreds] nb_setval(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Unify: (258) [$syspreds] nb_setval(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (259) [system] duplicate_term(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _299948)
   Exit: (259) [system] duplicate_term(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (259) [system] nb_linkval(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (259) [system] nb_linkval(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (258) [$syspreds] nb_setval(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (257) [user] p2mE(_327978, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Unify: (257) [user] p2mE(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (258) [system] atom(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (258) [system] atom(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Unify: (257) [user] p2mE(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Exit: (257) [user] p2mE(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (258) [system] create_prolog_flag(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', [keep(false), access(read_write), type(term)])
   Exit: (258) [system] create_prolog_flag(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', [keep(false), access(read_write), type(term)])
   Call: (258) [system] set_prolog_flag(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (258) [system] set_prolog_flag(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Exit: (256) [user] set_option_value0(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Exit: (255) [user] set_option_value(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Exit: (253) [system] sig_atomic(user:set_option_value(loading_file, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (254) [user] must_det_ll(set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1))
^  Unify: (254) [user] must_det_ll(user:set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1))
^  Call: (255) [user] once(user:set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1))
^  Unify: (255) [system] once(user:set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1))
^  Call: (256) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1)
^  Unify: (256) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1)
   Call: (257) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _431452)
   Unify: (257) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _431452)
   Call: (258) [system] atomic(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (258) [system] atomic(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (257) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (257) [user] retract(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _459478))
^  Fail: (257) [user] retract(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _459478))
^  Redo: (256) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1)
^  Call: (257) [user] asserta(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1))
^  Exit: (257) [user] asserta(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1))
^  Exit: (256) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1)
^  Exit: (255) [system] once(user:set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1))
^  Exit: (254) [user] must_det_ll(user:set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1))
^  Call: (254) [user] must_det_ll(load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (254) [user] must_det_ll(user:load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (255) [user] once(user:load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Unify: (255) [system] once(user:load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (256) [user] load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Unify: (256) [user] load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (257) [system] atom(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (257) [system] atom(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (257) [system] is_absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (257) [system] is_absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (257) [system] exists_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (257) [system] exists_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Unify: (256) [user] load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (257) [user] load_answer_file_now(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Unify: (257) [user] load_answer_file_now(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (258) [user] ignore((ensure_extension(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', answers, _52618), remove_specific_extension(_52618, answers, _52632), set_exec_num(_52632, 1), fbug(load_answer_file(_52618, _52632)), load_answer_file(_52618, _52632)))
^  Unify: (258) [system] ignore(user:(ensure_extension(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', answers, _52618), remove_specific_extension(_52618, answers, _52632), set_exec_num(_52632, 1), fbug(load_answer_file(_52618, _52632)), load_answer_file(_52618, _52632)))
^  Call: (260) [user] ensure_extension(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', answers, _52618)
^  Unify: (260) [user] ensure_extension(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', answers, _52618)
   Call: (261) [system] file_name_extension(_72066, _71990, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (261) [system] file_name_extension('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal', metta, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (261) [system] metta=answers
   Fail: (261) [system] metta=answers
^  Redo: (260) [user] ensure_extension(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', answers, _52618)
   Call: (261) [system] atom_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.', _88338)
   Exit: (261) [system] atom_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.')
   Call: (261) [system] atom_concat('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.', answers, _52618)
   Exit: (261) [system] atom_concat('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.', answers, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers')
^  Exit: (260) [user] ensure_extension(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', answers, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers')
^  Call: (260) [user] remove_specific_extension('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers', answers, _52632)
^  Unify: (260) [user] remove_specific_extension('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers', answers, _52632)
   Call: (261) [system] file_name_extension(_52632, _106558, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers')
   Exit: (261) [system] file_name_extension(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', answers, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers')
   Call: (261) [system] answers=answers
   Exit: (261) [system] answers=answers
^  Exit: (260) [user] remove_specific_extension('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers', answers, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (260) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1)
^  Unify: (260) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1)
   Call: (261) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _128660)
   Unify: (261) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _128660)
   Call: (262) [system] atomic(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (262) [system] atomic(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (261) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (261) [user] retract(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _156686))
^  Exit: (261) [user] retract(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1))
^  Call: (261) [user] asserta(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1))
^  Exit: (261) [user] asserta(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1))
^  Exit: (260) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1)
   Call: (260) [user] fbug(load_answer_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Unify: (260) [user] fbug(load_answer_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (261) [user] is_compatio
^  Unify: (261) [user] is_compatio
^  Call: (263) [system] setup_call_cleanup('$notrace'(_192292, _192294), once(user:is_compatio0), '$restore_trace'(_192292, _192294))
^  Unify: (263) [system] setup_call_cleanup(system:'$notrace'(_192292, _192294), system:once(user:is_compatio0), system:'$restore_trace'(_192292, _192294))
^  Call: (264) [system] sig_atomic(system:'$notrace'(_192292, _192294))
   Redo: (260) [user] fbug(load_answer_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
   Unify: (260) [user] fbug(load_answer_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (261) [user] real_notrace(in_cmt(color_g_mesg('#2f2f2f', write_src(load_answer_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))))
^  Unify: (261) [user] real_notrace(user:in_cmt(color_g_mesg('#2f2f2f', write_src(load_answer_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))))
^  Call: (262) [user] setup_call_cleanup('$notrace'(_214416, _214418), once(user:in_cmt(color_g_mesg('#2f2f2f', write_src(load_answer_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))))), '$restore_trace'(_214416, _214418))
^  Unify: (262) [system] setup_call_cleanup(user:'$notrace'(_214416, _214418), user:once(user:in_cmt(color_g_mesg('#2f2f2f', write_src(load_answer_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))))), user:'$restore_trace'(_214416, _214418))
^  Call: (263) [system] sig_atomic(user:'$notrace'(_214416, _214418))
P;HTML|
;                                           (load_answer_file  /home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers /home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta)

^  Exit: (262) [system] setup_call_cleanup(user:'$notrace'(3, -1), user:once(user:in_cmt(color_g_mesg('#2f2f2f', write_src(load_answer_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))))), user:'$restore_trace'(3, -1))
^  Exit: (261) [user] real_notrace(user:in_cmt(color_g_mesg('#2f2f2f', write_src(load_answer_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))))
   Exit: (260) [user] fbug(load_answer_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (260) [user] load_answer_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Unify: (260) [user] load_answer_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (261) [user] file_answers(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _288246, _288248)
^  Fail: (261) [user] file_answers(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _293076, _293078)
^  Redo: (260) [user] load_answer_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Call: (261) [system] exists_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers')
   Fail: (261) [system] exists_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers')
^  Redo: (260) [user] load_answer_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (261) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1)
^  Unify: (261) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1)
   Call: (262) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _318982)
   Unify: (262) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _318982)
   Call: (263) [system] atomic(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (263) [system] atomic(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (262) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (262) [user] retract(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _347008))
^  Exit: (262) [user] retract(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1))
^  Call: (262) [user] asserta(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1))
^  Exit: (262) [user] asserta(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1))
^  Exit: (261) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1)
^  Exit: (260) [user] load_answer_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Exit: (258) [system] ignore(user:(ensure_extension(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', answers, '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers'), remove_specific_extension('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers', answers, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'), set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1), fbug(load_answer_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')), load_answer_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.answers', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')))
^  Exit: (257) [user] load_answer_file_now(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Exit: (256) [user] load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Exit: (255) [system] once(user:load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Exit: (254) [user] must_det_ll(user:load_answer_file(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta'))
^  Call: (254) [user] must_det_ll(set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 0))
^  Unify: (254) [user] must_det_ll(user:set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 0))
^  Call: (255) [user] once(user:set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 0))
^  Unify: (255) [system] once(user:set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 0))
^  Call: (256) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 0)
^  Unify: (256) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 0)
   Call: (257) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _444652)
   Unify: (257) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _444652)
   Call: (258) [system] atomic(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (258) [system] atomic(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
   Exit: (257) [$syspreds] absolute_file_name(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta')
^  Call: (257) [user] retract(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', _472678))
^  Exit: (257) [user] retract(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 1))
^  Call: (257) [user] asserta(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 0))
^  Exit: (257) [user] asserta(file_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 0))
^  Exit: (256) [user] set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 0)
^  Exit: (255) [system] once(user:set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 0))
^  Exit: (254) [user] must_det_ll(user:set_exec_num(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', 0))
^  Call: (254) [user] must_det_ll(load_metta_file_stream_fast(12345, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', (0x55aefe44e2f0)))
^  Unify: (254) [user] must_det_ll(user:load_metta_file_stream_fast(12345, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', (0x55aefe44e2f0)))
^  Call: (255) [user] once(user:load_metta_file_stream_fast(12345, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', (0x55aefe44e2f0)))
^  Unify: (255) [system] once(user:load_metta_file_stream_fast(12345, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', (0x55aefe44e2f0)))
^  Call: (256) [user] load_metta_file_stream_fast(12345, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', (0x55aefe44e2f0))
^  Unify: (256) [user] load_metta_file_stream_fast(12345, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', (0x55aefe44e2f0))
   Call: (257) [system] fail
^  Redo: (256) [user] load_metta_file_stream_fast(12345, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', (0x55aefe44e2f0))
^  Unify: (256) [user] load_metta_file_stream_fast(12345, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', (0x55aefe44e2f0))
^  Call: (257) [user] symbol_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.buffer~', _28952)
^  Unify: (257) [user] symbol_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.buffer~', _28952)
   Call: (258) [system] atom_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.buffer~', _28952)
   Exit: (258) [system] atom_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.buffer~', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.buffer~')
^  Exit: (257) [user] symbol_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.buffer~', '/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.buffer~')
   Call: (257) [system] exists_file('/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta.buffer~')
^  Redo: (256) [user] load_metta_file_stream_fast(12345, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', (0x55aefe44e2f0))
^  Unify: (256) [user] load_metta_file_stream_fast(12345, read_metta2, P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '&corelib', (0x55aefe44e2f0))
^  Call: (257) [user] if_t(use_fast_buffer, (symbol_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.buffer~', _63716), fbugio(creating(_63716)), write_bf(_63716, (:-dynamic metta_file_buffer/5)), write_bf(_63716, (:-multifile metta_file_buffer/5))))
^  Unify: (257) [user] if_t(use_fast_buffer, (symbol_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.buffer~', _63716), fbugio(creating(_63716)), write_bf(_63716, (:-dynamic metta_file_buffer/5)), write_bf(_63716, (:-multifile metta_file_buffer/5))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, (symbol_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.buffer~', _63716), fbugio(creating(_63716)), write_bf(_63716, (:-dynamic metta_file_buffer/5)), write_bf(_63716, (:-multifile metta_file_buffer/5))))
^  Exit: (257) [user] if_t(use_fast_buffer, (symbol_concat(P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '.buffer~', _63716), fbugio(creating(_63716)), write_bf(_63716, (:-dynamic metta_file_buffer/5)), write_bf(_63716, (:-multifile metta_file_buffer/5))))
   Call: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _88590)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _89528))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _89528)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 0)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _88590)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _88590)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_88590))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_88590))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_88590))
   Exit: (259) [system] nonvar(position(_88590))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(0, 1, 0, 0))
   Call: (257) [user] current_read_mode(file, _109008)
   Unify: (257) [user] current_read_mode(file, _109008)
   Call: (258) [system] nb_current(file_mode, _109008)
   Redo: (257) [user] current_read_mode(file, _109008)
   Call: (258) [system] _109008=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _115458)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _115458)
^  Call: (258) [user] clause(t_l:s_reader_info(_115458), _117404, _117326)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _115458)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _115458)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _115458)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _115458)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _115458)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _115458)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _115458)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _115458)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _131234)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (260) [system] char_type('(', space)
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _115458)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _115458)
   Call: (260) [system] _135876=(0x55aefe44e2f0)
   Exit: (260) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (260) [user] once((read_position((0x55aefe44e2f0), _137744, _137746, _137748, _137750), read_sexpr((0x55aefe44e2f0), _137762), assertz(metta_file_comment(_137744, _137746, _137748, _137762, _137750))))
^  Unify: (260) [system] once(user:(read_position((0x55aefe44e2f0), _137744, _137746, _137748, _137750), read_sexpr((0x55aefe44e2f0), _137762), assertz(metta_file_comment(_137744, _137746, _137748, _137762, _137750))))
^  Call: (262) [user] read_position((0x55aefe44e2f0), _137744, _137746, _137748, _137750)
^  Unify: (262) [user] read_position((0x55aefe44e2f0), _137744, _137746, _137748, _137750)
   Call: (263) [system] stream_property((0x55aefe44e2f0), position(_137750))
   Unify: (263) [system] stream_property((0x55aefe44e2f0), position(_137750))
   Call: (264) [system] nonvar((0x55aefe44e2f0))
   Exit: (264) [system] nonvar((0x55aefe44e2f0))
   Call: (264) [system] nonvar(position(_137750))
   Exit: (264) [system] nonvar(position(_137750))
   Exit: (263) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(0, 1, 0, 0)))
   Call: (263) [$syspreds] stream_position_data(line_count, '$stream_position'(0, 1, 0, 0), _137744)
   Unify: (263) [$syspreds] stream_position_data(line_count, '$stream_position'(0, 1, 0, 0), _137744)
   Call: (264) [system] nonvar(line_count)
   Exit: (264) [system] nonvar(line_count)
   Call: (264) [$syspreds] stream_position_field(line_count, _151732)
   Unify: (264) [$syspreds] stream_position_field(line_count, 2)
   Exit: (264) [$syspreds] stream_position_field(line_count, 2)
   Call: (264) [system] arg(2, '$stream_position'(0, 1, 0, 0), _137744)
   Exit: (264) [system] arg(2, '$stream_position'(0, 1, 0, 0), 1)
   Exit: (263) [$syspreds] stream_position_data(line_count, '$stream_position'(0, 1, 0, 0), 1)
   Call: (263) [$syspreds] stream_position_data(line_position, '$stream_position'(0, 1, 0, 0), _137746)
   Unify: (263) [$syspreds] stream_position_data(line_position, '$stream_position'(0, 1, 0, 0), _137746)
   Call: (264) [system] nonvar(line_position)
   Exit: (264) [system] nonvar(line_position)
   Call: (264) [$syspreds] stream_position_field(line_position, _161026)
   Unify: (264) [$syspreds] stream_position_field(line_position, 3)
   Exit: (264) [$syspreds] stream_position_field(line_position, 3)
   Call: (264) [system] arg(3, '$stream_position'(0, 1, 0, 0), _137746)
   Exit: (264) [system] arg(3, '$stream_position'(0, 1, 0, 0), 0)
   Exit: (263) [$syspreds] stream_position_data(line_position, '$stream_position'(0, 1, 0, 0), 0)
   Call: (263) [$syspreds] stream_position_data(char_count, '$stream_position'(0, 1, 0, 0), _137748)
   Unify: (263) [$syspreds] stream_position_data(char_count, '$stream_position'(0, 1, 0, 0), _137748)
   Call: (264) [system] nonvar(char_count)
   Exit: (264) [system] nonvar(char_count)
   Call: (264) [$syspreds] stream_position_field(char_count, _170320)
   Unify: (264) [$syspreds] stream_position_field(char_count, 1)
   Exit: (264) [$syspreds] stream_position_field(char_count, 1)
   Call: (264) [system] arg(1, '$stream_position'(0, 1, 0, 0), _137748)
   Exit: (264) [system] arg(1, '$stream_position'(0, 1, 0, 0), 0)
   Exit: (263) [$syspreds] stream_position_data(char_count, '$stream_position'(0, 1, 0, 0), 0)
^  Exit: (262) [user] read_position((0x55aefe44e2f0), 1, 0, 0, '$stream_position'(0, 1, 0, 0))
^  Call: (262) [user] read_sexpr((0x55aefe44e2f0), _137762)
^  Unify: (262) [user] read_sexpr((0x55aefe44e2f0), _137762)
   Call: (263) [system] string((0x55aefe44e2f0))
^  Redo: (262) [user] read_sexpr((0x55aefe44e2f0), _137762)
^  Unify: (262) [user] read_sexpr((0x55aefe44e2f0), _137762)
^  Call: (263) [user] cont_sexpr(')', (0x55aefe44e2f0), _137762)
^  Unify: (263) [user] cont_sexpr(')', (0x55aefe44e2f0), _137762)
^  Call: (264) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (264) [user] skip_spaces((0x55aefe44e2f0))
   Call: (265) [system] peek_char((0x55aefe44e2f0), _185190)
   Exit: (265) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (265) [system] '('=(;)
^  Redo: (264) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (265) [user] is_like_space('(')
^  Unify: (265) [user] is_like_space('(')
   Call: (266) [system] char_type('(', 'white')
^  Redo: (265) [user] is_like_space('(')
^  Unify: (265) [user] is_like_space('(')
   Call: (266) [system] char_type('(', end_of_line)
^  Redo: (265) [user] is_like_space('(')
^  Unify: (265) [user] is_like_space('(')
   Call: (266) [system] char_type('(', space)
^  Redo: (265) [user] is_like_space('(')
^  Unify: (265) [user] is_like_space('(')
   Call: (266) [system] char_type('(', cntrl)
^  Redo: (264) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (264) [user] skip_spaces((0x55aefe44e2f0))
   Call: (264) [system] get_char((0x55aefe44e2f0), _201974)
   Exit: (264) [system] get_char((0x55aefe44e2f0), '(')
   Call: (264) [system] '('='('
   Exit: (264) [system] '('='('
^  Call: (264) [user] read_list(')', (0x55aefe44e2f0), _137762)
^  Unify: (264) [user] read_list(')', (0x55aefe44e2f0), _137762)
^  Call: (265) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (265) [user] skip_spaces((0x55aefe44e2f0))
   Call: (266) [system] peek_char((0x55aefe44e2f0), _209400)
   Exit: (266) [system] peek_char((0x55aefe44e2f0), :)
   Call: (266) [system] (:)=(;)
^  Redo: (265) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (266) [user] is_like_space(:)
^  Unify: (266) [user] is_like_space(:)
   Call: (267) [system] char_type(:, 'white')
^  Redo: (266) [user] is_like_space(:)
^  Unify: (266) [user] is_like_space(:)
   Call: (267) [system] char_type(:, end_of_line)
^  Redo: (266) [user] is_like_space(:)
^  Unify: (266) [user] is_like_space(:)
   Call: (267) [system] char_type(:, space)
^  Redo: (266) [user] is_like_space(:)
^  Unify: (266) [user] is_like_space(:)
   Call: (267) [system] char_type(:, cntrl)
^  Redo: (265) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (265) [user] skip_spaces((0x55aefe44e2f0))
   Call: (265) [system] peek_char((0x55aefe44e2f0), _226184)
   Exit: (265) [system] peek_char((0x55aefe44e2f0), :)
   Call: (265) [system] (:)=')'
^  Redo: (264) [user] read_list(')', (0x55aefe44e2f0), _137762)
   Call: (265) [system] (:)=end_of_file
^  Redo: (264) [user] read_list(')', (0x55aefe44e2f0), _137762)
^  Call: (265) [user] cont_sexpr(')', (0x55aefe44e2f0), _231762)
^  Unify: (265) [user] cont_sexpr(')', (0x55aefe44e2f0), _231762)
^  Call: (266) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (266) [user] skip_spaces((0x55aefe44e2f0))
   Call: (267) [system] peek_char((0x55aefe44e2f0), _235476)
   Exit: (267) [system] peek_char((0x55aefe44e2f0), :)
   Call: (267) [system] (:)=(;)
^  Redo: (266) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (267) [user] is_like_space(:)
^  Unify: (267) [user] is_like_space(:)
   Call: (268) [system] char_type(:, 'white')
^  Redo: (267) [user] is_like_space(:)
^  Unify: (267) [user] is_like_space(:)
   Call: (268) [system] char_type(:, end_of_line)
^  Redo: (267) [user] is_like_space(:)
^  Unify: (267) [user] is_like_space(:)
   Call: (268) [system] char_type(:, space)
^  Redo: (267) [user] is_like_space(:)
^  Unify: (267) [user] is_like_space(:)
   Call: (268) [system] char_type(:, cntrl)
^  Redo: (266) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (266) [user] skip_spaces((0x55aefe44e2f0))
   Call: (266) [system] get_char((0x55aefe44e2f0), _252260)
   Exit: (266) [system] get_char((0x55aefe44e2f0), :)
   Call: (266) [system] (:)='('
^  Redo: (265) [user] cont_sexpr(')', (0x55aefe44e2f0), _231762)
   Call: (266) [system] (:)='['
^  Redo: (265) [user] cont_sexpr(')', (0x55aefe44e2f0), _231762)
   Call: (266) [system] (:)='{'
^  Redo: (265) [user] cont_sexpr(')', (0x55aefe44e2f0), _231762)
   Call: (266) [system] (:)='"'
^  Redo: (265) [user] cont_sexpr(')', (0x55aefe44e2f0), _231762)
   Call: (266) [system] (:)=!
^  Redo: (265) [user] cont_sexpr(')', (0x55aefe44e2f0), _231762)
   Call: (266) [system] (:)='\''
^  Redo: (265) [user] cont_sexpr(')', (0x55aefe44e2f0), _231762)
   Call: (266) [system] (:)='`'
^  Redo: (265) [user] cont_sexpr(')', (0x55aefe44e2f0), _231762)
   Call: (266) [system] (:)=end_of_file
^  Redo: (265) [user] cont_sexpr(')', (0x55aefe44e2f0), _231762)
^  Call: (266) [user] read_symbolic(')', (0x55aefe44e2f0), :, _231762)
^  Unify: (266) [user] read_symbolic(')', (0x55aefe44e2f0), :, _231762)
^  Call: (267) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _270870)
^  Unify: (267) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _270870)
   Call: (268) [system] peek_char((0x55aefe44e2f0), _272736)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (268) [user] is_delimiter(' ')
^  Unify: (268) [user] is_delimiter(' ')
   Call: (269) [system] char_type(' ', space)
   Exit: (269) [system] char_type(' ', space)
^  Exit: (268) [user] is_delimiter(' ')
   Call: (268) [system] _270870=[]
   Exit: (268) [system] []=[]
^  Exit: (267) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (267) [user] classify_and_convert_charseq(:, [], _231762)
^  Unify: (267) [user] classify_and_convert_charseq(:, [], _231762)
^  Call: (269) [system] setup_call_cleanup('$notrace'(_283902, _283904), once(user:catch(read_from_chars([:], _231762), _283878, fail)), '$restore_trace'(_283902, _283904))
^  Unify: (269) [system] setup_call_cleanup(system:'$notrace'(_283902, _283904), system:once(user:catch(read_from_chars([:], _231762), _283878, fail)), system:'$restore_trace'(_283902, _283904))
^  Call: (270) [system] sig_atomic(system:'$notrace'(_283902, _283904))
^  Exit: (269) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([:], :), _283878, fail)), system:'$restore_trace'(3, -1))
   Call: (268) [system] atomic(:)
   Exit: (268) [system] atomic(:)
^  Exit: (267) [user] classify_and_convert_charseq(:, [], :)
^  Exit: (266) [user] read_symbolic(')', (0x55aefe44e2f0), :, :)
^  Exit: (265) [user] cont_sexpr(')', (0x55aefe44e2f0), :)
^  Call: (265) [user] read_list(')', (0x55aefe44e2f0), _292340)
^  Unify: (265) [user] read_list(')', (0x55aefe44e2f0), _292340)
^  Call: (266) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (266) [user] skip_spaces((0x55aefe44e2f0))
   Call: (267) [system] peek_char((0x55aefe44e2f0), _296054)
   Exit: (267) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (267) [system] ' '=(;)
^  Redo: (266) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (267) [user] is_like_space(' ')
^  Unify: (267) [user] is_like_space(' ')
   Call: (268) [system] char_type(' ', 'white')
   Exit: (268) [system] char_type(' ', 'white')
^  Exit: (267) [user] is_like_space(' ')
   Call: (267) [system] get_char((0x55aefe44e2f0), _304712)
   Exit: (267) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _308340)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (268) [system] 'E'=(;)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (268) [user] is_like_space('E')
^  Unify: (268) [user] is_like_space('E')
   Call: (269) [system] char_type('E', 'white')
^  Redo: (268) [user] is_like_space('E')
^  Unify: (268) [user] is_like_space('E')
   Call: (269) [system] char_type('E', end_of_line)
^  Redo: (268) [user] is_like_space('E')
^  Unify: (268) [user] is_like_space('E')
   Call: (269) [system] char_type('E', space)
^  Redo: (268) [user] is_like_space('E')
^  Unify: (268) [user] is_like_space('E')
   Call: (269) [system] char_type('E', cntrl)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (266) [user] skip_spaces((0x55aefe44e2f0))
   Call: (266) [system] peek_char((0x55aefe44e2f0), _326048)
   Exit: (266) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (266) [system] 'E'=')'
^  Redo: (265) [user] read_list(')', (0x55aefe44e2f0), _292340)
   Call: (266) [system] 'E'=end_of_file
^  Redo: (265) [user] read_list(')', (0x55aefe44e2f0), _292340)
^  Call: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _331626)
^  Unify: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _331626)
^  Call: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _335340)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (268) [system] 'E'=(;)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (268) [user] is_like_space('E')
^  Unify: (268) [user] is_like_space('E')
   Call: (269) [system] char_type('E', 'white')
^  Redo: (268) [user] is_like_space('E')
^  Unify: (268) [user] is_like_space('E')
   Call: (269) [system] char_type('E', end_of_line)
^  Redo: (268) [user] is_like_space('E')
^  Unify: (268) [user] is_like_space('E')
   Call: (269) [system] char_type('E', space)
^  Redo: (268) [user] is_like_space('E')
^  Unify: (268) [user] is_like_space('E')
   Call: (269) [system] char_type('E', cntrl)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (267) [system] get_char((0x55aefe44e2f0), _352124)
   Exit: (267) [system] get_char((0x55aefe44e2f0), 'E')
   Call: (267) [system] 'E'='('
^  Redo: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _331626)
   Call: (267) [system] 'E'='['
^  Redo: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _331626)
   Call: (267) [system] 'E'='{'
^  Redo: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _331626)
   Call: (267) [system] 'E'='"'
^  Redo: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _331626)
   Call: (267) [system] 'E'=!
^  Redo: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _331626)
   Call: (267) [system] 'E'='\''
^  Redo: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _331626)
   Call: (267) [system] 'E'='`'
^  Redo: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _331626)
   Call: (267) [system] 'E'=end_of_file
^  Redo: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _331626)
^  Call: (267) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', _331626)
^  Unify: (267) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', _331626)
^  Call: (268) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _370734)
^  Unify: (268) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _370734)
   Call: (269) [system] peek_char((0x55aefe44e2f0), _372600)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (269) [user] is_delimiter(r)
^  Unify: (269) [user] is_delimiter(r)
   Call: (270) [system] char_type(r, space)
^  Redo: (269) [user] is_delimiter(r)
   Call: (270) [system] arg(_378240, v('(', ')', end_of_file), r)
^  Redo: (268) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _370734)
   Call: (269) [system] ')'==r
^  Redo: (268) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _370734)
   Call: (269) [system] get_char((0x55aefe44e2f0), r)
   Exit: (269) [system] get_char((0x55aefe44e2f0), r)
   Call: (269) [system] r=(\)
^  Redo: (268) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _370734)
^  Call: (269) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _385606)
^  Unify: (269) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _385606)
   Call: (270) [system] peek_char((0x55aefe44e2f0), _387472)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (270) [user] is_delimiter(r)
^  Unify: (270) [user] is_delimiter(r)
   Call: (271) [system] char_type(r, space)
^  Redo: (270) [user] is_delimiter(r)
   Call: (271) [system] arg(_393112, v('(', ')', end_of_file), r)
^  Redo: (269) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _385606)
   Call: (270) [system] ')'==r
^  Redo: (269) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _385606)
   Call: (270) [system] get_char((0x55aefe44e2f0), r)
   Exit: (270) [system] get_char((0x55aefe44e2f0), r)
   Call: (270) [system] r=(\)
^  Redo: (269) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _385606)
^  Call: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _400478)
^  Unify: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _400478)
   Call: (271) [system] peek_char((0x55aefe44e2f0), _402344)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (271) [user] is_delimiter(o)
^  Unify: (271) [user] is_delimiter(o)
   Call: (272) [system] char_type(o, space)
^  Redo: (271) [user] is_delimiter(o)
   Call: (272) [system] arg(_407984, v('(', ')', end_of_file), o)
^  Redo: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _400478)
   Call: (271) [system] ')'==o
^  Redo: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _400478)
   Call: (271) [system] get_char((0x55aefe44e2f0), o)
   Exit: (271) [system] get_char((0x55aefe44e2f0), o)
   Call: (271) [system] o=(\)
^  Redo: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _400478)
^  Call: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _415350)
^  Unify: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _415350)
   Call: (272) [system] peek_char((0x55aefe44e2f0), _417216)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (272) [user] is_delimiter(r)
^  Unify: (272) [user] is_delimiter(r)
   Call: (273) [system] char_type(r, space)
^  Redo: (272) [user] is_delimiter(r)
   Call: (273) [system] arg(_422856, v('(', ')', end_of_file), r)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _415350)
   Call: (272) [system] ')'==r
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _415350)
   Call: (272) [system] get_char((0x55aefe44e2f0), r)
   Exit: (272) [system] get_char((0x55aefe44e2f0), r)
   Call: (272) [system] r=(\)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _415350)
^  Call: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430222)
^  Unify: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430222)
   Call: (273) [system] peek_char((0x55aefe44e2f0), _432088)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), 'T')
^  Call: (273) [user] is_delimiter('T')
^  Unify: (273) [user] is_delimiter('T')
   Call: (274) [system] char_type('T', space)
^  Redo: (273) [user] is_delimiter('T')
   Call: (274) [system] arg(_437728, v('(', ')', end_of_file), 'T')
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430222)
   Call: (273) [system] ')'=='T'
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430222)
   Call: (273) [system] get_char((0x55aefe44e2f0), 'T')
   Exit: (273) [system] get_char((0x55aefe44e2f0), 'T')
   Call: (273) [system] 'T'=(\)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430222)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445094)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445094)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _446960)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), y)
^  Call: (274) [user] is_delimiter(y)
^  Unify: (274) [user] is_delimiter(y)
   Call: (275) [system] char_type(y, space)
^  Redo: (274) [user] is_delimiter(y)
   Call: (275) [system] arg(_452600, v('(', ')', end_of_file), y)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445094)
   Call: (274) [system] ')'==y
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445094)
   Call: (274) [system] get_char((0x55aefe44e2f0), y)
   Exit: (274) [system] get_char((0x55aefe44e2f0), y)
   Call: (274) [system] y=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445094)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _459966)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _459966)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _461832)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (275) [user] is_delimiter(p)
^  Unify: (275) [user] is_delimiter(p)
   Call: (276) [system] char_type(p, space)
^  Redo: (275) [user] is_delimiter(p)
   Call: (276) [system] arg(_467472, v('(', ')', end_of_file), p)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _459966)
   Call: (275) [system] ')'==p
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _459966)
   Call: (275) [system] get_char((0x55aefe44e2f0), p)
   Exit: (275) [system] get_char((0x55aefe44e2f0), p)
   Call: (275) [system] p=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _459966)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _474838)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _474838)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _476704)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (276) [user] is_delimiter(e)
^  Unify: (276) [user] is_delimiter(e)
   Call: (277) [system] char_type(e, space)
^  Redo: (276) [user] is_delimiter(e)
   Call: (277) [system] arg(_482344, v('(', ')', end_of_file), e)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _474838)
   Call: (276) [system] ')'==e
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _474838)
   Call: (276) [system] get_char((0x55aefe44e2f0), e)
   Exit: (276) [system] get_char((0x55aefe44e2f0), e)
   Call: (276) [system] e=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _474838)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _489710)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _489710)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _491576)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (277) [user] is_delimiter(' ')
^  Unify: (277) [user] is_delimiter(' ')
   Call: (278) [system] char_type(' ', space)
   Exit: (278) [system] char_type(' ', space)
^  Exit: (277) [user] is_delimiter(' ')
   Call: (277) [system] _489710=[]
   Exit: (277) [system] []=[]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (276) [system] _474838=[e]
   Exit: (276) [system] [e]=[e]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e])
   Call: (275) [system] _459966=[p, e]
   Exit: (275) [system] [p, e]=[p, e]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, e])
   Call: (274) [system] _445094=[y, p, e]
   Exit: (274) [system] [y, p, e]=[y, p, e]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [y, p, e])
   Call: (273) [system] _430222=['T', y, p, e]
   Exit: (273) [system] ['T', y, p, e]=['T', y, p, e]
^  Exit: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), ['T', y, p, e])
   Call: (272) [system] _415350=[r, 'T', y, p, e]
   Exit: (272) [system] [r, 'T', y, p, e]=[r, 'T', y, p, e]
^  Exit: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, 'T', y, p, e])
   Call: (271) [system] _400478=[o, r, 'T', y, p, e]
   Exit: (271) [system] [o, r, 'T', y, p, e]=[o, r, 'T', y, p, e]
^  Exit: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, r, 'T', y, p, e])
   Call: (270) [system] _385606=[r, o, r, 'T', y, p, e]
   Exit: (270) [system] [r, o, r, 'T', y, p, e]=[r, o, r, 'T', y, p, e]
^  Exit: (269) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, o, r, 'T', y, p, e])
   Call: (269) [system] _370734=[r, r, o, r, 'T', y, p, e]
   Exit: (269) [system] [r, r, o, r, 'T', y, p, e]=[r, r, o, r, 'T', y, p, e]
^  Exit: (268) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, r, o, r, 'T', y, p, e])
^  Call: (268) [user] classify_and_convert_charseq('E', [r, r, o, r, 'T', y, p, e], _331626)
^  Unify: (268) [user] classify_and_convert_charseq('E', [r, r, o, r, 'T', y, p, e], _5984)
^  Call: (270) [system] setup_call_cleanup('$notrace'(_6962, _6964), once(user:catch(read_from_chars(['E', r, r, o, r, 'T', y, p, e], _5984), _6938, fail)), '$restore_trace'(_6962, _6964))
^  Unify: (270) [system] setup_call_cleanup(system:'$notrace'(_6962, _6964), system:once(user:catch(read_from_chars(['E', r, r, o, r, 'T', y, p, e], _5984), _6938, fail)), system:'$restore_trace'(_6962, _6964))
^  Call: (271) [system] sig_atomic(system:'$notrace'(_6962, _6964))
^  Exit: (270) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['E', r, r, o, r, 'T', y, p, e], _5984), _6938, fail)), system:'$restore_trace'(3, -1))
   Call: (269) [system] atomic(_5984)
^  Redo: (268) [user] classify_and_convert_charseq('E', [r, r, o, r, 'T', y, p, e], _5984)
^  Unify: (268) [user] classify_and_convert_charseq('E', [r, r, o, r, 'T', y, p, e], _5984)
   Call: (269) [system] atom_chars(_5984, ['E', r, r, o, r, 'T', y, p, e])
   Exit: (269) [system] atom_chars('ErrorType', ['E', r, r, o, r, 'T', y, p, e])
^  Exit: (268) [user] classify_and_convert_charseq('E', [r, r, o, r, 'T', y, p, e], 'ErrorType')
^  Exit: (267) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', 'ErrorType')
^  Exit: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), 'ErrorType')
^  Call: (266) [user] read_list(')', (0x55aefe44e2f0), _18216)
^  Unify: (266) [user] read_list(')', (0x55aefe44e2f0), _18216)
^  Call: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _21930)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (268) [system] ' '=(;)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (268) [user] is_like_space(' ')
^  Unify: (268) [user] is_like_space(' ')
   Call: (269) [system] char_type(' ', 'white')
   Exit: (269) [system] char_type(' ', 'white')
^  Exit: (268) [user] is_like_space(' ')
   Call: (268) [system] get_char((0x55aefe44e2f0), _30588)
   Exit: (268) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _34216)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), 'T')
   Call: (269) [system] 'T'=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space('T')
^  Unify: (269) [user] is_like_space('T')
   Call: (270) [system] char_type('T', 'white')
^  Redo: (269) [user] is_like_space('T')
^  Unify: (269) [user] is_like_space('T')
   Call: (270) [system] char_type('T', end_of_line)
^  Redo: (269) [user] is_like_space('T')
^  Unify: (269) [user] is_like_space('T')
   Call: (270) [system] char_type('T', space)
^  Redo: (269) [user] is_like_space('T')
^  Unify: (269) [user] is_like_space('T')
   Call: (270) [system] char_type('T', cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (267) [system] peek_char((0x55aefe44e2f0), _51924)
   Exit: (267) [system] peek_char((0x55aefe44e2f0), 'T')
   Call: (267) [system] 'T'=')'
^  Redo: (266) [user] read_list(')', (0x55aefe44e2f0), _18216)
   Call: (267) [system] 'T'=end_of_file
^  Redo: (266) [user] read_list(')', (0x55aefe44e2f0), _18216)
^  Call: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), _57502)
^  Unify: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), _57502)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _61216)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), 'T')
   Call: (269) [system] 'T'=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space('T')
^  Unify: (269) [user] is_like_space('T')
   Call: (270) [system] char_type('T', 'white')
^  Redo: (269) [user] is_like_space('T')
^  Unify: (269) [user] is_like_space('T')
   Call: (270) [system] char_type('T', end_of_line)
^  Redo: (269) [user] is_like_space('T')
^  Unify: (269) [user] is_like_space('T')
   Call: (270) [system] char_type('T', space)
^  Redo: (269) [user] is_like_space('T')
^  Unify: (269) [user] is_like_space('T')
   Call: (270) [system] char_type('T', cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] get_char((0x55aefe44e2f0), _78000)
   Exit: (268) [system] get_char((0x55aefe44e2f0), 'T')
   Call: (268) [system] 'T'='('
^  Redo: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), _57502)
   Call: (268) [system] 'T'='['
^  Redo: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), _57502)
   Call: (268) [system] 'T'='{'
^  Redo: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), _57502)
   Call: (268) [system] 'T'='"'
^  Redo: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), _57502)
   Call: (268) [system] 'T'=!
^  Redo: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), _57502)
   Call: (268) [system] 'T'='\''
^  Redo: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), _57502)
   Call: (268) [system] 'T'='`'
^  Redo: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), _57502)
   Call: (268) [system] 'T'=end_of_file
^  Redo: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), _57502)
^  Call: (268) [user] read_symbolic(')', (0x55aefe44e2f0), 'T', _57502)
^  Unify: (268) [user] read_symbolic(')', (0x55aefe44e2f0), 'T', _57502)
^  Call: (269) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _96610)
^  Unify: (269) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _96610)
   Call: (270) [system] peek_char((0x55aefe44e2f0), _98476)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), y)
^  Call: (270) [user] is_delimiter(y)
^  Unify: (270) [user] is_delimiter(y)
   Call: (271) [system] char_type(y, space)
^  Redo: (270) [user] is_delimiter(y)
   Call: (271) [system] arg(_104116, v('(', ')', end_of_file), y)
^  Redo: (269) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _96610)
   Call: (270) [system] ')'==y
^  Redo: (269) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _96610)
   Call: (270) [system] get_char((0x55aefe44e2f0), y)
   Exit: (270) [system] get_char((0x55aefe44e2f0), y)
   Call: (270) [system] y=(\)
^  Redo: (269) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _96610)
^  Call: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _111482)
^  Unify: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _111482)
   Call: (271) [system] peek_char((0x55aefe44e2f0), _113348)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (271) [user] is_delimiter(p)
^  Unify: (271) [user] is_delimiter(p)
   Call: (272) [system] char_type(p, space)
^  Redo: (271) [user] is_delimiter(p)
   Call: (272) [system] arg(_118988, v('(', ')', end_of_file), p)
^  Redo: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _111482)
   Call: (271) [system] ')'==p
^  Redo: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _111482)
   Call: (271) [system] get_char((0x55aefe44e2f0), p)
   Exit: (271) [system] get_char((0x55aefe44e2f0), p)
   Call: (271) [system] p=(\)
^  Redo: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _111482)
^  Call: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _126354)
^  Unify: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _126354)
   Call: (272) [system] peek_char((0x55aefe44e2f0), _128220)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (272) [user] is_delimiter(e)
^  Unify: (272) [user] is_delimiter(e)
   Call: (273) [system] char_type(e, space)
^  Redo: (272) [user] is_delimiter(e)
   Call: (273) [system] arg(_133860, v('(', ')', end_of_file), e)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _126354)
   Call: (272) [system] ')'==e
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _126354)
   Call: (272) [system] get_char((0x55aefe44e2f0), e)
   Exit: (272) [system] get_char((0x55aefe44e2f0), e)
   Call: (272) [system] e=(\)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _126354)
^  Call: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _141226)
^  Unify: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _141226)
   Call: (273) [system] peek_char((0x55aefe44e2f0), _143092)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (273) [user] is_delimiter(')')
^  Unify: (273) [user] is_delimiter(')')
   Call: (274) [system] char_type(')', space)
^  Redo: (273) [user] is_delimiter(')')
   Call: (274) [system] arg(_148732, v('(', ')', end_of_file), ')')
   Exit: (274) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (273) [user] is_delimiter(')')
   Call: (273) [system] _141226=[]
   Exit: (273) [system] []=[]
^  Exit: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (272) [system] _126354=[e]
   Exit: (272) [system] [e]=[e]
^  Exit: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e])
   Call: (271) [system] _111482=[p, e]
   Exit: (271) [system] [p, e]=[p, e]
^  Exit: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, e])
   Call: (270) [system] _96610=[y, p, e]
   Exit: (270) [system] [y, p, e]=[y, p, e]
^  Exit: (269) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [y, p, e])
^  Call: (269) [user] classify_and_convert_charseq('T', [y, p, e], _57502)
^  Unify: (269) [user] classify_and_convert_charseq('T', [y, p, e], _57502)
^  Call: (271) [system] setup_call_cleanup('$notrace'(_164508, _164510), once(user:catch(read_from_chars(['T', y, p, e], _57502), _164484, fail)), '$restore_trace'(_164508, _164510))
^  Unify: (271) [system] setup_call_cleanup(system:'$notrace'(_164508, _164510), system:once(user:catch(read_from_chars(['T', y, p, e], _57502), _164484, fail)), system:'$restore_trace'(_164508, _164510))
^  Call: (272) [system] sig_atomic(system:'$notrace'(_164508, _164510))
^  Exit: (271) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['T', y, p, e], _57502), _164484, fail)), system:'$restore_trace'(3, -1))
   Call: (270) [system] atomic(_57502)
^  Redo: (269) [user] classify_and_convert_charseq('T', [y, p, e], _57502)
^  Unify: (269) [user] classify_and_convert_charseq('T', [y, p, e], _57502)
   Call: (270) [system] atom_chars(_57502, ['T', y, p, e])
   Exit: (270) [system] atom_chars('Type', ['T', y, p, e])
^  Exit: (269) [user] classify_and_convert_charseq('T', [y, p, e], 'Type')
^  Exit: (268) [user] read_symbolic(')', (0x55aefe44e2f0), 'T', 'Type')
^  Exit: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Type')
^  Call: (267) [user] read_list(')', (0x55aefe44e2f0), _175762)
^  Unify: (267) [user] read_list(')', (0x55aefe44e2f0), _175762)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _179476)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (269) [system] ')'=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space(')')
^  Unify: (269) [user] is_like_space(')')
   Call: (270) [system] char_type(')', 'white')
^  Redo: (269) [user] is_like_space(')')
^  Unify: (269) [user] is_like_space(')')
   Call: (270) [system] char_type(')', end_of_line)
^  Redo: (269) [user] is_like_space(')')
^  Unify: (269) [user] is_like_space(')')
   Call: (270) [system] char_type(')', space)
^  Redo: (269) [user] is_like_space(')')
^  Unify: (269) [user] is_like_space(')')
   Call: (270) [system] char_type(')', cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _196260)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (268) [system] ')'=')'
   Exit: (268) [system] ')'=')'
   Call: (268) [system] get_char((0x55aefe44e2f0), _200050)
   Exit: (268) [system] get_char((0x55aefe44e2f0), ')')
   Call: (268) [system] _175762=[]
   Exit: (268) [system] []=[]
^  Exit: (267) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (267) [system] _18216=['Type']
   Exit: (267) [system] ['Type']=['Type']
^  Exit: (266) [user] read_list(')', (0x55aefe44e2f0), ['Type'])
   Call: (266) [system] _5980=['ErrorType', 'Type']
   Exit: (266) [system] ['ErrorType', 'Type']=['ErrorType', 'Type']
^  Exit: (265) [user] read_list(')', (0x55aefe44e2f0), ['ErrorType', 'Type'])
   Call: (265) [system] _5940=[:, 'ErrorType', 'Type']
   Exit: (265) [system] [:, 'ErrorType', 'Type']=[:, 'ErrorType', 'Type']
^  Exit: (264) [user] read_list(')', (0x55aefe44e2f0), [:, 'ErrorType', 'Type'])
^  Exit: (263) [user] cont_sexpr(')', (0x55aefe44e2f0), [:, 'ErrorType', 'Type'])
^  Exit: (262) [user] read_sexpr((0x55aefe44e2f0), [:, 'ErrorType', 'Type'])
^  Call: (262) [user] assertz(metta_file_comment(1, 0, 0, [:, 'ErrorType', 'Type'], '$stream_position'(0, 1, 0, 0)))
^  Exit: (262) [user] assertz(metta_file_comment(1, 0, 0, [:, 'ErrorType', 'Type'], '$stream_position'(0, 1, 0, 0)))
^  Exit: (260) [system] once(user:(read_position((0x55aefe44e2f0), 1, 0, 0, '$stream_position'(0, 1, 0, 0)), read_sexpr((0x55aefe44e2f0), [:, 'ErrorType', 'Type']), assertz(metta_file_comment(1, 0, 0, [:, 'ErrorType', 'Type'], '$stream_position'(0, 1, 0, 0)))))
   Call: (260) [system] fail
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Call: (260) [user] retract(metta_file_comment(_220424, _220426, _220428, _220430, _220432))
^  Exit: (260) [user] retract(metta_file_comment(505, 0, 19151, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$stream_position'(19151, 505, 0, 19151)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _224192))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _224192))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _224192)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _224192)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _224192)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _224192)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _229804))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _229804))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _229804))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _229804))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _229804)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _229804)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _235390))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _235390))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _235390)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _235390)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _235390)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _235390)
   Call: (270) [system] var('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _235390)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$VAR'(_242850))
   Call: (270) [system] atom('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _235390)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _235390)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _235390)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _235390)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _235390)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _235390)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0)==[_252130, _252136]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _235390)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _235390)
   Call: (270) [system] is_list('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _235390)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _235390)
   Call: (270) [system] string('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _235390)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _235390)
   Call: (270) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
   Exit: (270) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _262332, _262334)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 505, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;", 505, 0], _266074)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;", 505, 0], _266074)
   Call: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;", 505, 0], _266074, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;", 505, 0], [_268892|_268894], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _268892)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _268892)
   Call: (273) [system] var(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _268892)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", '$VAR'(_273538))
   Call: (273) [system] atom(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _268892)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _268892)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;"==true
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _268892)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _268892)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;"==false
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _268892)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _268892)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;"==[_282818, _282824]
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _268892)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _268892)
   Call: (273) [system] is_list(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _268892)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _268892)
   Call: (273) [system] string(";;;;;;;;;;;;;;;;;;;;;;")
   Exit: (273) [system] string(";;;;;;;;;;;;;;;;;;;;;;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _268892)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _268892)
   Call: (273) [system] compound(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _268892)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _268892)
^  Call: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;")
^  Unify: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;")
   Call: (274) [system] atom(";;;;;;;;;;;;;;;;;;;;;;")
   Fail: (274) [system] atom(";;;;;;;;;;;;;;;;;;;;;;")
^  Fail: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _268892)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;"=_268892
   Exit: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;"=";;;;;;;;;;;;;;;;;;;;;;"
^  Exit: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;")
   Call: (272) [apply] apply:maplist_([505, 0], _268894, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([505, 0], [_306890|_306892], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(505, _306890)
^  Unify: (273) [user] mfix_vars1(505, _306890)
   Call: (274) [system] var(505)
^  Redo: (273) [user] mfix_vars1(505, _306890)
^  Unify: (273) [user] mfix_vars1(505, '$VAR'(_311536))
   Call: (274) [system] atom(505)
^  Redo: (273) [user] mfix_vars1(505, _306890)
^  Unify: (273) [user] mfix_vars1(505, _306890)
   Call: (274) [system] 505==true
^  Redo: (273) [user] mfix_vars1(505, _306890)
^  Unify: (273) [user] mfix_vars1(505, _306890)
   Call: (274) [system] 505==false
^  Redo: (273) [user] mfix_vars1(505, _306890)
^  Unify: (273) [user] mfix_vars1(505, _306890)
   Call: (274) [system] 505==[_320816, _320822]
^  Redo: (273) [user] mfix_vars1(505, _306890)
^  Unify: (273) [user] mfix_vars1(505, _306890)
   Call: (274) [system] is_list(505)
^  Redo: (273) [user] mfix_vars1(505, _306890)
^  Unify: (273) [user] mfix_vars1(505, _306890)
   Call: (274) [system] string(505)
^  Redo: (273) [user] mfix_vars1(505, _306890)
^  Unify: (273) [user] mfix_vars1(505, _306890)
   Call: (274) [system] compound(505)
^  Redo: (273) [user] mfix_vars1(505, _306890)
^  Unify: (273) [user] mfix_vars1(505, _306890)
^  Call: (274) [user] symbol(505)
^  Unify: (274) [user] symbol(505)
   Call: (275) [system] atom(505)
   Fail: (275) [system] atom(505)
^  Fail: (274) [user] symbol(505)
^  Redo: (273) [user] mfix_vars1(505, _306890)
   Call: (274) [system] 505=_306890
   Exit: (274) [system] 505=505
^  Exit: (273) [user] mfix_vars1(505, 505)
   Call: (273) [apply] apply:maplist_([0], _306892, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_341216|_341218], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _341216)
^  Unify: (274) [user] mfix_vars1(0, _341216)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _341216)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_345862))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _341216)
^  Unify: (274) [user] mfix_vars1(0, _341216)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _341216)
^  Unify: (274) [user] mfix_vars1(0, _341216)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _341216)
^  Unify: (274) [user] mfix_vars1(0, _341216)
   Call: (275) [system] 0==[_355142, _355148]
^  Redo: (274) [user] mfix_vars1(0, _341216)
^  Unify: (274) [user] mfix_vars1(0, _341216)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _341216)
^  Unify: (274) [user] mfix_vars1(0, _341216)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _341216)
^  Unify: (274) [user] mfix_vars1(0, _341216)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _341216)
^  Unify: (274) [user] mfix_vars1(0, _341216)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _341216)
   Call: (275) [system] 0=_341216
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _341218, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([505, 0], [505, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;", 505, 0], [";;;;;;;;;;;;;;;;;;;;;;", 505, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;", 505, 0], [";;;;;;;;;;;;;;;;;;;;;;", 505, 0])
   Call: (270) [system] compound_name_arguments(_235390, '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 505, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 505, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _229804)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _391390))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _391390))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _391390))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _391390))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _391390)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _391390)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _396976))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _396976))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _396976)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _396976)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _396976)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _391390)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _224192))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _224192))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _224192))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _224192))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _224192)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _224192)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _419296))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _419296))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _419296)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _419296)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _419296)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _224192)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0)))
   Call: (261) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _448074, [], _448076)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _448074, [], _448076)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _448074, [], _448076)
   Call: (258) [system] atom('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _448074, [], _448076)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _448074, [], _448076)
   Call: (258) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
   Exit: (258) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), _457390, _457392)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 505, 0])
^  Call: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;", 505, 0], _459276, [], _448076)
^  Unify: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;", 505, 0], [";;;;;;;;;;;;;;;;;;;;;;", 505, 0], [], [])
   Call: (259) [system] var([";;;;;;;;;;;;;;;;;;;;;;", 505, 0])
^  Redo: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;", 505, 0], _459276, [], _448076)
^  Unify: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;", 505, 0], [_463012|_463014], [], _448076)
^  Call: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _463012, [], _463952)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;", [], [])
   Call: (260) [system] var(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _463012, [], _463952)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _463012, [], _463952)
   Call: (260) [system] atom(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _463012, [], _463952)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _463012, [], _463952)
   Call: (260) [system] compound(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _463012, [], _463952)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;", [], [])
^  Exit: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;", [], [])
^  Call: (259) [user] subst_vars([505, 0], _463014, [], _448076)
^  Unify: (259) [user] subst_vars([505, 0], [505, 0], [], [])
   Call: (260) [system] var([505, 0])
^  Redo: (259) [user] subst_vars([505, 0], _463014, [], _448076)
^  Unify: (259) [user] subst_vars([505, 0], [_478884|_478886], [], _448076)
^  Call: (260) [user] subst_vars(505, _478884, [], _479824)
^  Unify: (260) [user] subst_vars(505, 505, [], [])
   Call: (261) [system] var(505)
^  Redo: (260) [user] subst_vars(505, _478884, [], _479824)
^  Unify: (260) [user] subst_vars(505, _478884, [], _479824)
   Call: (261) [system] atom(505)
^  Redo: (260) [user] subst_vars(505, _478884, [], _479824)
^  Unify: (260) [user] subst_vars(505, _478884, [], _479824)
   Call: (261) [system] compound(505)
^  Redo: (260) [user] subst_vars(505, _478884, [], _479824)
^  Unify: (260) [user] subst_vars(505, 505, [], [])
^  Exit: (260) [user] subst_vars(505, 505, [], [])
^  Call: (260) [user] subst_vars([0], _478886, [], _448076)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _478886, [], _448076)
^  Unify: (260) [user] subst_vars([0], [_494756|_494758], [], _448076)
^  Call: (261) [user] subst_vars(0, _494756, [], _495696)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _494756, [], _495696)
^  Unify: (261) [user] subst_vars(0, _494756, [], _495696)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _494756, [], _495696)
^  Unify: (261) [user] subst_vars(0, _494756, [], _495696)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _494756, [], _495696)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _494758, [], _448076)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _494758, [], _448076)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([505, 0], [505, 0], [], [])
^  Exit: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;", 505, 0], [";;;;;;;;;;;;;;;;;;;;;;", 505, 0], [], [])
   Call: (258) [system] compound_name_arguments(_448074, '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 505, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 505, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), [], [])
   Call: (257) [system] _518114=metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 505, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(506, 0, 19174, '$COMMENT'("; Metta Map-Atom", 506, 0), '$stream_position'(19174, 506, 0, 19174)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'("; Metta Map-Atom", 506, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'("; Metta Map-Atom", 506, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'("; Metta Map-Atom", 506, 0), _53204))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'("; Metta Map-Atom", 506, 0), _53204))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'("; Metta Map-Atom", 506, 0), _53204)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'("; Metta Map-Atom", 506, 0), _53204)
^  Call: (263) [user] untyped_to_metta('$COMMENT'("; Metta Map-Atom", 506, 0), _53204)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'("; Metta Map-Atom", 506, 0), _53204)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'("; Metta Map-Atom", 506, 0), _58816))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'("; Metta Map-Atom", 506, 0), _58816))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'("; Metta Map-Atom", 506, 0), _58816))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'("; Metta Map-Atom", 506, 0), _58816))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'("; Metta Map-Atom", 506, 0), _58816)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'("; Metta Map-Atom", 506, 0), _58816)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'("; Metta Map-Atom", 506, 0), _64402))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'("; Metta Map-Atom", 506, 0), _64402))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'("; Metta Map-Atom", 506, 0), _64402)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'("; Metta Map-Atom", 506, 0), _64402)
^  Call: (269) [user] mfix_vars1('$COMMENT'("; Metta Map-Atom", 506, 0), _64402)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Metta Map-Atom", 506, 0), _64402)
   Call: (270) [system] var('$COMMENT'("; Metta Map-Atom", 506, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Metta Map-Atom", 506, 0), _64402)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Metta Map-Atom", 506, 0), '$VAR'(_71862))
   Call: (270) [system] atom('$COMMENT'("; Metta Map-Atom", 506, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Metta Map-Atom", 506, 0), _64402)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Metta Map-Atom", 506, 0), _64402)
   Call: (270) [system] '$COMMENT'("; Metta Map-Atom", 506, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Metta Map-Atom", 506, 0), _64402)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Metta Map-Atom", 506, 0), _64402)
   Call: (270) [system] '$COMMENT'("; Metta Map-Atom", 506, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Metta Map-Atom", 506, 0), _64402)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Metta Map-Atom", 506, 0), _64402)
   Call: (270) [system] '$COMMENT'("; Metta Map-Atom", 506, 0)==[_81142, _81148]
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Metta Map-Atom", 506, 0), _64402)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Metta Map-Atom", 506, 0), _64402)
   Call: (270) [system] is_list('$COMMENT'("; Metta Map-Atom", 506, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Metta Map-Atom", 506, 0), _64402)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Metta Map-Atom", 506, 0), _64402)
   Call: (270) [system] string('$COMMENT'("; Metta Map-Atom", 506, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Metta Map-Atom", 506, 0), _64402)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Metta Map-Atom", 506, 0), _64402)
   Call: (270) [system] compound('$COMMENT'("; Metta Map-Atom", 506, 0))
   Exit: (270) [system] compound('$COMMENT'("; Metta Map-Atom", 506, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'("; Metta Map-Atom", 506, 0), _91344, _91346)
   Exit: (270) [system] compound_name_arguments('$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT', ["; Metta Map-Atom", 506, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, ["; Metta Map-Atom", 506, 0], _95086)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, ["; Metta Map-Atom", 506, 0], _95086)
   Call: (271) [apply] apply:maplist_(["; Metta Map-Atom", 506, 0], _95086, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_(["; Metta Map-Atom", 506, 0], [_97904|_97906], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1("; Metta Map-Atom", _97904)
^  Unify: (272) [user] mfix_vars1("; Metta Map-Atom", _97904)
   Call: (273) [system] var("; Metta Map-Atom")
^  Redo: (272) [user] mfix_vars1("; Metta Map-Atom", _97904)
^  Unify: (272) [user] mfix_vars1("; Metta Map-Atom", '$VAR'(_102550))
   Call: (273) [system] atom("; Metta Map-Atom")
^  Redo: (272) [user] mfix_vars1("; Metta Map-Atom", _97904)
^  Unify: (272) [user] mfix_vars1("; Metta Map-Atom", _97904)
   Call: (273) [system] "; Metta Map-Atom"==true
^  Redo: (272) [user] mfix_vars1("; Metta Map-Atom", _97904)
^  Unify: (272) [user] mfix_vars1("; Metta Map-Atom", _97904)
   Call: (273) [system] "; Metta Map-Atom"==false
^  Redo: (272) [user] mfix_vars1("; Metta Map-Atom", _97904)
^  Unify: (272) [user] mfix_vars1("; Metta Map-Atom", _97904)
   Call: (273) [system] "; Metta Map-Atom"==[_111830, _111836]
^  Redo: (272) [user] mfix_vars1("; Metta Map-Atom", _97904)
^  Unify: (272) [user] mfix_vars1("; Metta Map-Atom", _97904)
   Call: (273) [system] is_list("; Metta Map-Atom")
^  Redo: (272) [user] mfix_vars1("; Metta Map-Atom", _97904)
^  Unify: (272) [user] mfix_vars1("; Metta Map-Atom", _97904)
   Call: (273) [system] string("; Metta Map-Atom")
   Exit: (273) [system] string("; Metta Map-Atom")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1("; Metta Map-Atom", _97904)
^  Unify: (272) [user] mfix_vars1("; Metta Map-Atom", _97904)
   Call: (273) [system] compound("; Metta Map-Atom")
^  Redo: (272) [user] mfix_vars1("; Metta Map-Atom", _97904)
^  Unify: (272) [user] mfix_vars1("; Metta Map-Atom", _97904)
^  Call: (273) [user] symbol("; Metta Map-Atom")
^  Unify: (273) [user] symbol("; Metta Map-Atom")
   Call: (274) [system] atom("; Metta Map-Atom")
   Fail: (274) [system] atom("; Metta Map-Atom")
^  Fail: (273) [user] symbol("; Metta Map-Atom")
^  Redo: (272) [user] mfix_vars1("; Metta Map-Atom", _97904)
   Call: (273) [system] "; Metta Map-Atom"=_97904
   Exit: (273) [system] "; Metta Map-Atom"="; Metta Map-Atom"
^  Exit: (272) [user] mfix_vars1("; Metta Map-Atom", "; Metta Map-Atom")
   Call: (272) [apply] apply:maplist_([506, 0], _97906, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([506, 0], [_135902|_135904], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(506, _135902)
^  Unify: (273) [user] mfix_vars1(506, _135902)
   Call: (274) [system] var(506)
^  Redo: (273) [user] mfix_vars1(506, _135902)
^  Unify: (273) [user] mfix_vars1(506, '$VAR'(_140548))
   Call: (274) [system] atom(506)
^  Redo: (273) [user] mfix_vars1(506, _135902)
^  Unify: (273) [user] mfix_vars1(506, _135902)
   Call: (274) [system] 506==true
^  Redo: (273) [user] mfix_vars1(506, _135902)
^  Unify: (273) [user] mfix_vars1(506, _135902)
   Call: (274) [system] 506==false
^  Redo: (273) [user] mfix_vars1(506, _135902)
^  Unify: (273) [user] mfix_vars1(506, _135902)
   Call: (274) [system] 506==[_149828, _149834]
^  Redo: (273) [user] mfix_vars1(506, _135902)
^  Unify: (273) [user] mfix_vars1(506, _135902)
   Call: (274) [system] is_list(506)
^  Redo: (273) [user] mfix_vars1(506, _135902)
^  Unify: (273) [user] mfix_vars1(506, _135902)
   Call: (274) [system] string(506)
^  Redo: (273) [user] mfix_vars1(506, _135902)
^  Unify: (273) [user] mfix_vars1(506, _135902)
   Call: (274) [system] compound(506)
^  Redo: (273) [user] mfix_vars1(506, _135902)
^  Unify: (273) [user] mfix_vars1(506, _135902)
^  Call: (274) [user] symbol(506)
^  Unify: (274) [user] symbol(506)
   Call: (275) [system] atom(506)
   Fail: (275) [system] atom(506)
^  Fail: (274) [user] symbol(506)
^  Redo: (273) [user] mfix_vars1(506, _135902)
   Call: (274) [system] 506=_135902
   Exit: (274) [system] 506=506
^  Exit: (273) [user] mfix_vars1(506, 506)
   Call: (273) [apply] apply:maplist_([0], _135904, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_170228|_170230], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _170228)
^  Unify: (274) [user] mfix_vars1(0, _170228)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _170228)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_174874))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _170228)
^  Unify: (274) [user] mfix_vars1(0, _170228)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _170228)
^  Unify: (274) [user] mfix_vars1(0, _170228)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _170228)
^  Unify: (274) [user] mfix_vars1(0, _170228)
   Call: (275) [system] 0==[_184154, _184160]
^  Redo: (274) [user] mfix_vars1(0, _170228)
^  Unify: (274) [user] mfix_vars1(0, _170228)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _170228)
^  Unify: (274) [user] mfix_vars1(0, _170228)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _170228)
^  Unify: (274) [user] mfix_vars1(0, _170228)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _170228)
^  Unify: (274) [user] mfix_vars1(0, _170228)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _170228)
   Call: (275) [system] 0=_170228
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _170230, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([506, 0], [506, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_(["; Metta Map-Atom", 506, 0], ["; Metta Map-Atom", 506, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, ["; Metta Map-Atom", 506, 0], ["; Metta Map-Atom", 506, 0])
   Call: (270) [system] compound_name_arguments(_64402, '$COMMENT', ["; Metta Map-Atom", 506, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT', ["; Metta Map-Atom", 506, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0)))
   Call: (267) [system] '$COMMENT'("; Metta Map-Atom", 506, 0)\=@='$COMMENT'("; Metta Map-Atom", 506, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'("; Metta Map-Atom", 506, 0), _58816)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'("; Metta Map-Atom", 506, 0), _220402))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'("; Metta Map-Atom", 506, 0), _220402))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'("; Metta Map-Atom", 506, 0), _220402))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'("; Metta Map-Atom", 506, 0), _220402))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'("; Metta Map-Atom", 506, 0), _220402)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'("; Metta Map-Atom", 506, 0), _220402)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'("; Metta Map-Atom", 506, 0), _225988))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'("; Metta Map-Atom", 506, 0), _225988))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'("; Metta Map-Atom", 506, 0), _225988)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'("; Metta Map-Atom", 506, 0), _225988)
^  Call: (269) [user] cons_to_c('$COMMENT'("; Metta Map-Atom", 506, 0), _225988)
^  Unify: (269) [user] cons_to_c('$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0)))
   Call: (267) [system] '$COMMENT'("; Metta Map-Atom", 506, 0)\=@='$COMMENT'("; Metta Map-Atom", 506, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'("; Metta Map-Atom", 506, 0), _220402)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'("; Metta Map-Atom", 506, 0), _53204))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'("; Metta Map-Atom", 506, 0), _53204))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'("; Metta Map-Atom", 506, 0), _53204))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'("; Metta Map-Atom", 506, 0), _53204))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'("; Metta Map-Atom", 506, 0), _53204)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'("; Metta Map-Atom", 506, 0), _53204)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'("; Metta Map-Atom", 506, 0), _248308))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'("; Metta Map-Atom", 506, 0), _248308))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'("; Metta Map-Atom", 506, 0), _248308)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'("; Metta Map-Atom", 506, 0), _248308)
^  Call: (269) [user] cons_to_l('$COMMENT'("; Metta Map-Atom", 506, 0), _248308)
^  Unify: (269) [user] cons_to_l('$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0)))
   Call: (267) [system] '$COMMENT'("; Metta Map-Atom", 506, 0)\=@='$COMMENT'("; Metta Map-Atom", 506, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'("; Metta Map-Atom", 506, 0), _53204)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0)))
   Call: (261) [system] '$COMMENT'("; Metta Map-Atom", 506, 0)\=@='$COMMENT'("; Metta Map-Atom", 506, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'("; Metta Map-Atom", 506, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; Metta Map-Atom", 506, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; Metta Map-Atom", 506, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; Metta Map-Atom", 506, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; Metta Map-Atom", 506, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'("; Metta Map-Atom", 506, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'("; Metta Map-Atom", 506, 0))
^  Call: (257) [user] subst_vars('$COMMENT'("; Metta Map-Atom", 506, 0), _277086, [], _277088)
^  Unify: (257) [user] subst_vars('$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0), [], [])
   Call: (258) [system] var('$COMMENT'("; Metta Map-Atom", 506, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'("; Metta Map-Atom", 506, 0), _277086, [], _277088)
^  Unify: (257) [user] subst_vars('$COMMENT'("; Metta Map-Atom", 506, 0), _277086, [], _277088)
   Call: (258) [system] atom('$COMMENT'("; Metta Map-Atom", 506, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'("; Metta Map-Atom", 506, 0), _277086, [], _277088)
^  Unify: (257) [user] subst_vars('$COMMENT'("; Metta Map-Atom", 506, 0), _277086, [], _277088)
   Call: (258) [system] compound('$COMMENT'("; Metta Map-Atom", 506, 0))
   Exit: (258) [system] compound('$COMMENT'("; Metta Map-Atom", 506, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'("; Metta Map-Atom", 506, 0), _286402, _286404)
   Exit: (258) [system] compound_name_arguments('$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT', ["; Metta Map-Atom", 506, 0])
^  Call: (258) [user] subst_vars(["; Metta Map-Atom", 506, 0], _288288, [], _277088)
^  Unify: (258) [user] subst_vars(["; Metta Map-Atom", 506, 0], ["; Metta Map-Atom", 506, 0], [], [])
   Call: (259) [system] var(["; Metta Map-Atom", 506, 0])
^  Redo: (258) [user] subst_vars(["; Metta Map-Atom", 506, 0], _288288, [], _277088)
^  Unify: (258) [user] subst_vars(["; Metta Map-Atom", 506, 0], [_292024|_292026], [], _277088)
^  Call: (259) [user] subst_vars("; Metta Map-Atom", _292024, [], _292964)
^  Unify: (259) [user] subst_vars("; Metta Map-Atom", "; Metta Map-Atom", [], [])
   Call: (260) [system] var("; Metta Map-Atom")
^  Redo: (259) [user] subst_vars("; Metta Map-Atom", _292024, [], _292964)
^  Unify: (259) [user] subst_vars("; Metta Map-Atom", _292024, [], _292964)
   Call: (260) [system] atom("; Metta Map-Atom")
^  Redo: (259) [user] subst_vars("; Metta Map-Atom", _292024, [], _292964)
^  Unify: (259) [user] subst_vars("; Metta Map-Atom", _292024, [], _292964)
   Call: (260) [system] compound("; Metta Map-Atom")
^  Redo: (259) [user] subst_vars("; Metta Map-Atom", _292024, [], _292964)
^  Unify: (259) [user] subst_vars("; Metta Map-Atom", "; Metta Map-Atom", [], [])
^  Exit: (259) [user] subst_vars("; Metta Map-Atom", "; Metta Map-Atom", [], [])
^  Call: (259) [user] subst_vars([506, 0], _292026, [], _277088)
^  Unify: (259) [user] subst_vars([506, 0], [506, 0], [], [])
   Call: (260) [system] var([506, 0])
^  Redo: (259) [user] subst_vars([506, 0], _292026, [], _277088)
^  Unify: (259) [user] subst_vars([506, 0], [_307896|_307898], [], _277088)
^  Call: (260) [user] subst_vars(506, _307896, [], _308836)
^  Unify: (260) [user] subst_vars(506, 506, [], [])
   Call: (261) [system] var(506)
^  Redo: (260) [user] subst_vars(506, _307896, [], _308836)
^  Unify: (260) [user] subst_vars(506, _307896, [], _308836)
   Call: (261) [system] atom(506)
^  Redo: (260) [user] subst_vars(506, _307896, [], _308836)
^  Unify: (260) [user] subst_vars(506, _307896, [], _308836)
   Call: (261) [system] compound(506)
^  Redo: (260) [user] subst_vars(506, _307896, [], _308836)
^  Unify: (260) [user] subst_vars(506, 506, [], [])
^  Exit: (260) [user] subst_vars(506, 506, [], [])
^  Call: (260) [user] subst_vars([0], _307898, [], _277088)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _307898, [], _277088)
^  Unify: (260) [user] subst_vars([0], [_323768|_323770], [], _277088)
^  Call: (261) [user] subst_vars(0, _323768, [], _324708)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _323768, [], _324708)
^  Unify: (261) [user] subst_vars(0, _323768, [], _324708)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _323768, [], _324708)
^  Unify: (261) [user] subst_vars(0, _323768, [], _324708)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _323768, [], _324708)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _323770, [], _277088)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _323770, [], _277088)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([506, 0], [506, 0], [], [])
^  Exit: (258) [user] subst_vars(["; Metta Map-Atom", 506, 0], ["; Metta Map-Atom", 506, 0], [], [])
   Call: (258) [system] compound_name_arguments(_277086, '$COMMENT', ["; Metta Map-Atom", 506, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT', ["; Metta Map-Atom", 506, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'("; Metta Map-Atom", 506, 0), '$COMMENT'("; Metta Map-Atom", 506, 0), [], [])
   Call: (257) [system] _347126=metta_file_buffer(+, '$COMMENT'("; Metta Map-Atom", 506, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'("; Metta Map-Atom", 506, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'("; Metta Map-Atom", 506, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'("; Metta Map-Atom", 506, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'("; Metta Map-Atom", 506, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'("; Metta Map-Atom", 506, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'("; Metta Map-Atom", 506, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'("; Metta Map-Atom", 506, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'("; Metta Map-Atom", 506, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(507, 0, 19191, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$stream_position'(19191, 507, 0, 19191)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _399846))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _399846))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _399846)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _399846)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _399846)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _399846)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _405458))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _405458))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _405458))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _405458))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _405458)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _405458)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _411044))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _411044))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _411044)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _411044)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _411044)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _411044)
   Call: (270) [system] var('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _411044)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$VAR'(_418504))
   Call: (270) [system] atom('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _411044)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _411044)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _411044)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _411044)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _411044)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _411044)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0)==[_427784, _427790]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _411044)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _411044)
   Call: (270) [system] is_list('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _411044)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _411044)
   Call: (270) [system] string('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _411044)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _411044)
   Call: (270) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
   Exit: (270) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _437986, _437988)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 507, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;", 507, 0], _441728)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;", 507, 0], _441728)
   Call: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;", 507, 0], _441728, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;", 507, 0], [_444546|_444548], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _444546)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _444546)
   Call: (273) [system] var(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _444546)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", '$VAR'(_449192))
   Call: (273) [system] atom(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _444546)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _444546)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;"==true
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _444546)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _444546)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;"==false
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _444546)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _444546)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;"==[_458472, _458478]
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _444546)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _444546)
   Call: (273) [system] is_list(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _444546)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _444546)
   Call: (273) [system] string(";;;;;;;;;;;;;;;;;;;;;;")
   Exit: (273) [system] string(";;;;;;;;;;;;;;;;;;;;;;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _444546)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _444546)
   Call: (273) [system] compound(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _444546)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _444546)
^  Call: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;")
^  Unify: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;")
   Call: (274) [system] atom(";;;;;;;;;;;;;;;;;;;;;;")
   Fail: (274) [system] atom(";;;;;;;;;;;;;;;;;;;;;;")
^  Fail: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _444546)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;"=_444546
   Exit: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;"=";;;;;;;;;;;;;;;;;;;;;;"
^  Exit: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;")
   Call: (272) [apply] apply:maplist_([507, 0], _444548, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([507, 0], [_482544|_482546], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(507, _482544)
^  Unify: (273) [user] mfix_vars1(507, _482544)
   Call: (274) [system] var(507)
^  Redo: (273) [user] mfix_vars1(507, _482544)
^  Unify: (273) [user] mfix_vars1(507, '$VAR'(_487190))
   Call: (274) [system] atom(507)
^  Redo: (273) [user] mfix_vars1(507, _482544)
^  Unify: (273) [user] mfix_vars1(507, _482544)
   Call: (274) [system] 507==true
^  Redo: (273) [user] mfix_vars1(507, _482544)
^  Unify: (273) [user] mfix_vars1(507, _482544)
   Call: (274) [system] 507==false
^  Redo: (273) [user] mfix_vars1(507, _482544)
^  Unify: (273) [user] mfix_vars1(507, _482544)
   Call: (274) [system] 507==[_496470, _496476]
^  Redo: (273) [user] mfix_vars1(507, _482544)
^  Unify: (273) [user] mfix_vars1(507, _482544)
   Call: (274) [system] is_list(507)
^  Redo: (273) [user] mfix_vars1(507, _482544)
^  Unify: (273) [user] mfix_vars1(507, _482544)
   Call: (274) [system] string(507)
^  Redo: (273) [user] mfix_vars1(507, _482544)
^  Unify: (273) [user] mfix_vars1(507, _482544)
   Call: (274) [system] compound(507)
^  Redo: (273) [user] mfix_vars1(507, _482544)
^  Unify: (273) [user] mfix_vars1(507, _482544)
^  Call: (274) [user] symbol(507)
^  Unify: (274) [user] symbol(507)
   Call: (275) [system] atom(507)
   Fail: (275) [system] atom(507)
^  Fail: (274) [user] symbol(507)
^  Redo: (273) [user] mfix_vars1(507, _482544)
   Call: (274) [system] 507=_482544
   Exit: (274) [system] 507=507
^  Exit: (273) [user] mfix_vars1(507, 507)
   Call: (273) [apply] apply:maplist_([0], _482546, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_516870|_516872], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _516870)
^  Unify: (274) [user] mfix_vars1(0, _516870)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _516870)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_521516))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _6038)
^  Unify: (274) [user] mfix_vars1(0, _6038)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _6038)
^  Unify: (274) [user] mfix_vars1(0, _6038)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _6038)
^  Unify: (274) [user] mfix_vars1(0, _6038)
   Call: (275) [system] 0==[_12894, _12900]
^  Redo: (274) [user] mfix_vars1(0, _6038)
^  Unify: (274) [user] mfix_vars1(0, _6038)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _6038)
^  Unify: (274) [user] mfix_vars1(0, _6038)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _6038)
^  Unify: (274) [user] mfix_vars1(0, _6038)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _6038)
^  Unify: (274) [user] mfix_vars1(0, _6038)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6038)
   Call: (275) [system] 0=_6038
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6040, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([507, 0], [507, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;", 507, 0], [";;;;;;;;;;;;;;;;;;;;;;", 507, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;", 507, 0], [";;;;;;;;;;;;;;;;;;;;;;", 507, 0])
   Call: (270) [system] compound_name_arguments(_5980, '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 507, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 507, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _5966)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _49142))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _49142))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _49142))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _49142))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _49142)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _49142)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _54728))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _54728))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _54728)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _54728)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _54728)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _49142)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _5946))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _5946))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _5946))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _5946))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _5946)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _5946)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _77048))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _77048))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _77048)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _77048)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _77048)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _5946)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0)))
   Call: (261) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _105826, [], _105828)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _105826, [], _105828)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _105826, [], _105828)
   Call: (258) [system] atom('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _105826, [], _105828)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _105826, [], _105828)
   Call: (258) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
   Exit: (258) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), _115142, _115144)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 507, 0])
^  Call: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;", 507, 0], _117028, [], _105828)
^  Unify: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;", 507, 0], [";;;;;;;;;;;;;;;;;;;;;;", 507, 0], [], [])
   Call: (259) [system] var([";;;;;;;;;;;;;;;;;;;;;;", 507, 0])
^  Redo: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;", 507, 0], _117028, [], _105828)
^  Unify: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;", 507, 0], [_120764|_120766], [], _105828)
^  Call: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _120764, [], _121704)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;", [], [])
   Call: (260) [system] var(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _120764, [], _121704)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _120764, [], _121704)
   Call: (260) [system] atom(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _120764, [], _121704)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _120764, [], _121704)
   Call: (260) [system] compound(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _120764, [], _121704)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;", [], [])
^  Exit: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;", [], [])
^  Call: (259) [user] subst_vars([507, 0], _120766, [], _105828)
^  Unify: (259) [user] subst_vars([507, 0], [507, 0], [], [])
   Call: (260) [system] var([507, 0])
^  Redo: (259) [user] subst_vars([507, 0], _120766, [], _105828)
^  Unify: (259) [user] subst_vars([507, 0], [_136636|_136638], [], _105828)
^  Call: (260) [user] subst_vars(507, _136636, [], _137576)
^  Unify: (260) [user] subst_vars(507, 507, [], [])
   Call: (261) [system] var(507)
^  Redo: (260) [user] subst_vars(507, _136636, [], _137576)
^  Unify: (260) [user] subst_vars(507, _136636, [], _137576)
   Call: (261) [system] atom(507)
^  Redo: (260) [user] subst_vars(507, _136636, [], _137576)
^  Unify: (260) [user] subst_vars(507, _136636, [], _137576)
   Call: (261) [system] compound(507)
^  Redo: (260) [user] subst_vars(507, _136636, [], _137576)
^  Unify: (260) [user] subst_vars(507, 507, [], [])
^  Exit: (260) [user] subst_vars(507, 507, [], [])
^  Call: (260) [user] subst_vars([0], _136638, [], _105828)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _136638, [], _105828)
^  Unify: (260) [user] subst_vars([0], [_152508|_152510], [], _105828)
^  Call: (261) [user] subst_vars(0, _152508, [], _153448)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _152508, [], _153448)
^  Unify: (261) [user] subst_vars(0, _152508, [], _153448)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _152508, [], _153448)
^  Unify: (261) [user] subst_vars(0, _152508, [], _153448)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _152508, [], _153448)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _152510, [], _105828)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _152510, [], _105828)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([507, 0], [507, 0], [], [])
^  Exit: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;", 507, 0], [";;;;;;;;;;;;;;;;;;;;;;", 507, 0], [], [])
   Call: (258) [system] compound_name_arguments(_105826, '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 507, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 507, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), [], [])
   Call: (257) [system] _175866=metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 507, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(508, 0, 19214, '$COMMENT'(";; #[test]", 508, 0), '$stream_position'(19214, 508, 0, 19214)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 508, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 508, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; #[test]", 508, 0), _228584))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 508, 0), _228584))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; #[test]", 508, 0), _228584)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 508, 0), _228584)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 508, 0), _228584)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 508, 0), _228584)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; #[test]", 508, 0), _234196))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 508, 0), _234196))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 508, 0), _234196))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 508, 0), _234196))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 508, 0), _234196)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 508, 0), _234196)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; #[test]", 508, 0), _239782))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 508, 0), _239782))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; #[test]", 508, 0), _239782)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 508, 0), _239782)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 508, 0), _239782)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 508, 0), _239782)
   Call: (270) [system] var('$COMMENT'(";; #[test]", 508, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 508, 0), _239782)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 508, 0), '$VAR'(_247242))
   Call: (270) [system] atom('$COMMENT'(";; #[test]", 508, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 508, 0), _239782)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 508, 0), _239782)
   Call: (270) [system] '$COMMENT'(";; #[test]", 508, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 508, 0), _239782)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 508, 0), _239782)
   Call: (270) [system] '$COMMENT'(";; #[test]", 508, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 508, 0), _239782)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 508, 0), _239782)
   Call: (270) [system] '$COMMENT'(";; #[test]", 508, 0)==[_256522, _256528]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 508, 0), _239782)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 508, 0), _239782)
   Call: (270) [system] is_list('$COMMENT'(";; #[test]", 508, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 508, 0), _239782)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 508, 0), _239782)
   Call: (270) [system] string('$COMMENT'(";; #[test]", 508, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 508, 0), _239782)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 508, 0), _239782)
   Call: (270) [system] compound('$COMMENT'(";; #[test]", 508, 0))
   Exit: (270) [system] compound('$COMMENT'(";; #[test]", 508, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 508, 0), _266724, _266726)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 508, 0), '$COMMENT', [";; #[test]", 508, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; #[test]", 508, 0], _270466)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 508, 0], _270466)
   Call: (271) [apply] apply:maplist_([";; #[test]", 508, 0], _270466, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; #[test]", 508, 0], [_273284|_273286], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; #[test]", _273284)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _273284)
   Call: (273) [system] var(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _273284)
^  Unify: (272) [user] mfix_vars1(";; #[test]", '$VAR'(_277930))
   Call: (273) [system] atom(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _273284)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _273284)
   Call: (273) [system] ";; #[test]"==true
^  Redo: (272) [user] mfix_vars1(";; #[test]", _273284)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _273284)
   Call: (273) [system] ";; #[test]"==false
^  Redo: (272) [user] mfix_vars1(";; #[test]", _273284)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _273284)
   Call: (273) [system] ";; #[test]"==[_287210, _287216]
^  Redo: (272) [user] mfix_vars1(";; #[test]", _273284)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _273284)
   Call: (273) [system] is_list(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _273284)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _273284)
   Call: (273) [system] string(";; #[test]")
   Exit: (273) [system] string(";; #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; #[test]", _273284)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _273284)
   Call: (273) [system] compound(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _273284)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _273284)
^  Call: (273) [user] symbol(";; #[test]")
^  Unify: (273) [user] symbol(";; #[test]")
   Call: (274) [system] atom(";; #[test]")
   Fail: (274) [system] atom(";; #[test]")
^  Fail: (273) [user] symbol(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _273284)
   Call: (273) [system] ";; #[test]"=_273284
   Exit: (273) [system] ";; #[test]"=";; #[test]"
^  Exit: (272) [user] mfix_vars1(";; #[test]", ";; #[test]")
   Call: (272) [apply] apply:maplist_([508, 0], _273286, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([508, 0], [_311282|_311284], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(508, _311282)
^  Unify: (273) [user] mfix_vars1(508, _311282)
   Call: (274) [system] var(508)
^  Redo: (273) [user] mfix_vars1(508, _311282)
^  Unify: (273) [user] mfix_vars1(508, '$VAR'(_315928))
   Call: (274) [system] atom(508)
^  Redo: (273) [user] mfix_vars1(508, _311282)
^  Unify: (273) [user] mfix_vars1(508, _311282)
   Call: (274) [system] 508==true
^  Redo: (273) [user] mfix_vars1(508, _311282)
^  Unify: (273) [user] mfix_vars1(508, _311282)
   Call: (274) [system] 508==false
^  Redo: (273) [user] mfix_vars1(508, _311282)
^  Unify: (273) [user] mfix_vars1(508, _311282)
   Call: (274) [system] 508==[_325208, _325214]
^  Redo: (273) [user] mfix_vars1(508, _311282)
^  Unify: (273) [user] mfix_vars1(508, _311282)
   Call: (274) [system] is_list(508)
^  Redo: (273) [user] mfix_vars1(508, _311282)
^  Unify: (273) [user] mfix_vars1(508, _311282)
   Call: (274) [system] string(508)
^  Redo: (273) [user] mfix_vars1(508, _311282)
^  Unify: (273) [user] mfix_vars1(508, _311282)
   Call: (274) [system] compound(508)
^  Redo: (273) [user] mfix_vars1(508, _311282)
^  Unify: (273) [user] mfix_vars1(508, _311282)
^  Call: (274) [user] symbol(508)
^  Unify: (274) [user] symbol(508)
   Call: (275) [system] atom(508)
   Fail: (275) [system] atom(508)
^  Fail: (274) [user] symbol(508)
^  Redo: (273) [user] mfix_vars1(508, _311282)
   Call: (274) [system] 508=_311282
   Exit: (274) [system] 508=508
^  Exit: (273) [user] mfix_vars1(508, 508)
   Call: (273) [apply] apply:maplist_([0], _311284, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_345608|_345610], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _345608)
^  Unify: (274) [user] mfix_vars1(0, _345608)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _345608)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_350254))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _345608)
^  Unify: (274) [user] mfix_vars1(0, _345608)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _345608)
^  Unify: (274) [user] mfix_vars1(0, _345608)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _345608)
^  Unify: (274) [user] mfix_vars1(0, _345608)
   Call: (275) [system] 0==[_359534, _359540]
^  Redo: (274) [user] mfix_vars1(0, _345608)
^  Unify: (274) [user] mfix_vars1(0, _345608)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _345608)
^  Unify: (274) [user] mfix_vars1(0, _345608)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _345608)
^  Unify: (274) [user] mfix_vars1(0, _345608)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _345608)
^  Unify: (274) [user] mfix_vars1(0, _345608)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _345608)
   Call: (275) [system] 0=_345608
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _345610, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([508, 0], [508, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; #[test]", 508, 0], [";; #[test]", 508, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 508, 0], [";; #[test]", 508, 0])
   Call: (270) [system] compound_name_arguments(_239782, '$COMMENT', [";; #[test]", 508, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 508, 0), '$COMMENT', [";; #[test]", 508, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 508, 0)\=@='$COMMENT'(";; #[test]", 508, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 508, 0), _234196)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; #[test]", 508, 0), _395782))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 508, 0), _395782))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 508, 0), _395782))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 508, 0), _395782))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 508, 0), _395782)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 508, 0), _395782)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; #[test]", 508, 0), _401368))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 508, 0), _401368))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; #[test]", 508, 0), _401368)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 508, 0), _401368)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 508, 0), _401368)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 508, 0)\=@='$COMMENT'(";; #[test]", 508, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 508, 0), _395782)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; #[test]", 508, 0), _228584))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 508, 0), _228584))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 508, 0), _228584))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 508, 0), _228584))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 508, 0), _228584)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 508, 0), _228584)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; #[test]", 508, 0), _423688))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 508, 0), _423688))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; #[test]", 508, 0), _423688)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 508, 0), _423688)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 508, 0), _423688)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 508, 0)\=@='$COMMENT'(";; #[test]", 508, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 508, 0), _228584)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0)))
   Call: (261) [system] '$COMMENT'(";; #[test]", 508, 0)\=@='$COMMENT'(";; #[test]", 508, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 508, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 508, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 508, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 508, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 508, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 508, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 508, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; #[test]", 508, 0), _452466, [], _452468)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; #[test]", 508, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 508, 0), _452466, [], _452468)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 508, 0), _452466, [], _452468)
   Call: (258) [system] atom('$COMMENT'(";; #[test]", 508, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 508, 0), _452466, [], _452468)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 508, 0), _452466, [], _452468)
   Call: (258) [system] compound('$COMMENT'(";; #[test]", 508, 0))
   Exit: (258) [system] compound('$COMMENT'(";; #[test]", 508, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 508, 0), _461782, _461784)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 508, 0), '$COMMENT', [";; #[test]", 508, 0])
^  Call: (258) [user] subst_vars([";; #[test]", 508, 0], _463668, [], _452468)
^  Unify: (258) [user] subst_vars([";; #[test]", 508, 0], [";; #[test]", 508, 0], [], [])
   Call: (259) [system] var([";; #[test]", 508, 0])
^  Redo: (258) [user] subst_vars([";; #[test]", 508, 0], _463668, [], _452468)
^  Unify: (258) [user] subst_vars([";; #[test]", 508, 0], [_467404|_467406], [], _452468)
^  Call: (259) [user] subst_vars(";; #[test]", _467404, [], _468344)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
   Call: (260) [system] var(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _467404, [], _468344)
^  Unify: (259) [user] subst_vars(";; #[test]", _467404, [], _468344)
   Call: (260) [system] atom(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _467404, [], _468344)
^  Unify: (259) [user] subst_vars(";; #[test]", _467404, [], _468344)
   Call: (260) [system] compound(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _467404, [], _468344)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Exit: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Call: (259) [user] subst_vars([508, 0], _467406, [], _452468)
^  Unify: (259) [user] subst_vars([508, 0], [508, 0], [], [])
   Call: (260) [system] var([508, 0])
^  Redo: (259) [user] subst_vars([508, 0], _467406, [], _452468)
^  Unify: (259) [user] subst_vars([508, 0], [_483276|_483278], [], _452468)
^  Call: (260) [user] subst_vars(508, _483276, [], _484216)
^  Unify: (260) [user] subst_vars(508, 508, [], [])
   Call: (261) [system] var(508)
^  Redo: (260) [user] subst_vars(508, _483276, [], _484216)
^  Unify: (260) [user] subst_vars(508, _483276, [], _484216)
   Call: (261) [system] atom(508)
^  Redo: (260) [user] subst_vars(508, _483276, [], _484216)
^  Unify: (260) [user] subst_vars(508, _483276, [], _484216)
   Call: (261) [system] compound(508)
^  Redo: (260) [user] subst_vars(508, _483276, [], _484216)
^  Unify: (260) [user] subst_vars(508, 508, [], [])
^  Exit: (260) [user] subst_vars(508, 508, [], [])
^  Call: (260) [user] subst_vars([0], _483278, [], _452468)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _483278, [], _452468)
^  Unify: (260) [user] subst_vars([0], [_499148|_499150], [], _452468)
^  Call: (261) [user] subst_vars(0, _499148, [], _500088)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _499148, [], _500088)
^  Unify: (261) [user] subst_vars(0, _499148, [], _500088)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _499148, [], _500088)
^  Unify: (261) [user] subst_vars(0, _499148, [], _500088)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _499148, [], _500088)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _499150, [], _452468)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _499150, [], _452468)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([508, 0], [508, 0], [], [])
^  Exit: (258) [user] subst_vars([";; #[test]", 508, 0], [";; #[test]", 508, 0], [], [])
   Call: (258) [system] compound_name_arguments(_452466, '$COMMENT', [";; #[test]", 508, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 508, 0), '$COMMENT', [";; #[test]", 508, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; #[test]", 508, 0), '$COMMENT'(";; #[test]", 508, 0), [], [])
   Call: (257) [system] _522506=metta_file_buffer(+, '$COMMENT'(";; #[test]", 508, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; #[test]", 508, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; #[test]", 508, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 508, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 508, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 508, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 508, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 508, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 508, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(509, 0, 19225, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$stream_position'(19225, 509, 0, 19225)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _57470))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _57470))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _57470)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _57470)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _57470)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _57470)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _63082))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _63082))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _63082))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _63082))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _63082)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _63082)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _68668))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _68668))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _68668)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _68668)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _68668)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _68668)
   Call: (270) [system] var('$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _68668)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$VAR'(_76128))
   Call: (270) [system] atom('$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _68668)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _68668)
   Call: (270) [system] '$COMMENT'(";; fn metta_map_atom() {", 509, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _68668)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _68668)
   Call: (270) [system] '$COMMENT'(";; fn metta_map_atom() {", 509, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _68668)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _68668)
   Call: (270) [system] '$COMMENT'(";; fn metta_map_atom() {", 509, 0)==[_85408, _85414]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _68668)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _68668)
   Call: (270) [system] is_list('$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _68668)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _68668)
   Call: (270) [system] string('$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _68668)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _68668)
   Call: (270) [system] compound('$COMMENT'(";; fn metta_map_atom() {", 509, 0))
   Exit: (270) [system] compound('$COMMENT'(";; fn metta_map_atom() {", 509, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _95610, _95612)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT', [";; fn metta_map_atom() {", 509, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; fn metta_map_atom() {", 509, 0], _99352)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn metta_map_atom() {", 509, 0], _99352)
   Call: (271) [apply] apply:maplist_([";; fn metta_map_atom() {", 509, 0], _99352, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; fn metta_map_atom() {", 509, 0], [_102170|_102172], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; fn metta_map_atom() {", _102170)
^  Unify: (272) [user] mfix_vars1(";; fn metta_map_atom() {", _102170)
   Call: (273) [system] var(";; fn metta_map_atom() {")
^  Redo: (272) [user] mfix_vars1(";; fn metta_map_atom() {", _102170)
^  Unify: (272) [user] mfix_vars1(";; fn metta_map_atom() {", '$VAR'(_106816))
   Call: (273) [system] atom(";; fn metta_map_atom() {")
^  Redo: (272) [user] mfix_vars1(";; fn metta_map_atom() {", _102170)
^  Unify: (272) [user] mfix_vars1(";; fn metta_map_atom() {", _102170)
   Call: (273) [system] ";; fn metta_map_atom() {"==true
^  Redo: (272) [user] mfix_vars1(";; fn metta_map_atom() {", _102170)
^  Unify: (272) [user] mfix_vars1(";; fn metta_map_atom() {", _102170)
   Call: (273) [system] ";; fn metta_map_atom() {"==false
^  Redo: (272) [user] mfix_vars1(";; fn metta_map_atom() {", _102170)
^  Unify: (272) [user] mfix_vars1(";; fn metta_map_atom() {", _102170)
   Call: (273) [system] ";; fn metta_map_atom() {"==[_116096, _116102]
^  Redo: (272) [user] mfix_vars1(";; fn metta_map_atom() {", _102170)
^  Unify: (272) [user] mfix_vars1(";; fn metta_map_atom() {", _102170)
   Call: (273) [system] is_list(";; fn metta_map_atom() {")
^  Redo: (272) [user] mfix_vars1(";; fn metta_map_atom() {", _102170)
^  Unify: (272) [user] mfix_vars1(";; fn metta_map_atom() {", _102170)
   Call: (273) [system] string(";; fn metta_map_atom() {")
   Exit: (273) [system] string(";; fn metta_map_atom() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; fn metta_map_atom() {", _102170)
^  Unify: (272) [user] mfix_vars1(";; fn metta_map_atom() {", _102170)
   Call: (273) [system] compound(";; fn metta_map_atom() {")
^  Redo: (272) [user] mfix_vars1(";; fn metta_map_atom() {", _102170)
^  Unify: (272) [user] mfix_vars1(";; fn metta_map_atom() {", _102170)
^  Call: (273) [user] symbol(";; fn metta_map_atom() {")
^  Unify: (273) [user] symbol(";; fn metta_map_atom() {")
   Call: (274) [system] atom(";; fn metta_map_atom() {")
   Fail: (274) [system] atom(";; fn metta_map_atom() {")
^  Fail: (273) [user] symbol(";; fn metta_map_atom() {")
^  Redo: (272) [user] mfix_vars1(";; fn metta_map_atom() {", _102170)
   Call: (273) [system] ";; fn metta_map_atom() {"=_102170
   Exit: (273) [system] ";; fn metta_map_atom() {"=";; fn metta_map_atom() {"
^  Exit: (272) [user] mfix_vars1(";; fn metta_map_atom() {", ";; fn metta_map_atom() {")
   Call: (272) [apply] apply:maplist_([509, 0], _102172, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([509, 0], [_140168|_140170], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(509, _140168)
^  Unify: (273) [user] mfix_vars1(509, _140168)
   Call: (274) [system] var(509)
^  Redo: (273) [user] mfix_vars1(509, _140168)
^  Unify: (273) [user] mfix_vars1(509, '$VAR'(_144814))
   Call: (274) [system] atom(509)
^  Redo: (273) [user] mfix_vars1(509, _140168)
^  Unify: (273) [user] mfix_vars1(509, _140168)
   Call: (274) [system] 509==true
^  Redo: (273) [user] mfix_vars1(509, _140168)
^  Unify: (273) [user] mfix_vars1(509, _140168)
   Call: (274) [system] 509==false
^  Redo: (273) [user] mfix_vars1(509, _140168)
^  Unify: (273) [user] mfix_vars1(509, _140168)
   Call: (274) [system] 509==[_154094, _154100]
^  Redo: (273) [user] mfix_vars1(509, _140168)
^  Unify: (273) [user] mfix_vars1(509, _140168)
   Call: (274) [system] is_list(509)
^  Redo: (273) [user] mfix_vars1(509, _140168)
^  Unify: (273) [user] mfix_vars1(509, _140168)
   Call: (274) [system] string(509)
^  Redo: (273) [user] mfix_vars1(509, _140168)
^  Unify: (273) [user] mfix_vars1(509, _140168)
   Call: (274) [system] compound(509)
^  Redo: (273) [user] mfix_vars1(509, _140168)
^  Unify: (273) [user] mfix_vars1(509, _140168)
^  Call: (274) [user] symbol(509)
^  Unify: (274) [user] symbol(509)
   Call: (275) [system] atom(509)
   Fail: (275) [system] atom(509)
^  Fail: (274) [user] symbol(509)
^  Redo: (273) [user] mfix_vars1(509, _140168)
   Call: (274) [system] 509=_140168
   Exit: (274) [system] 509=509
^  Exit: (273) [user] mfix_vars1(509, 509)
   Call: (273) [apply] apply:maplist_([0], _140170, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_174494|_174496], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _174494)
^  Unify: (274) [user] mfix_vars1(0, _174494)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _174494)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_179140))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _174494)
^  Unify: (274) [user] mfix_vars1(0, _174494)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _174494)
^  Unify: (274) [user] mfix_vars1(0, _174494)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _174494)
^  Unify: (274) [user] mfix_vars1(0, _174494)
   Call: (275) [system] 0==[_188420, _188426]
^  Redo: (274) [user] mfix_vars1(0, _174494)
^  Unify: (274) [user] mfix_vars1(0, _174494)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _174494)
^  Unify: (274) [user] mfix_vars1(0, _174494)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _174494)
^  Unify: (274) [user] mfix_vars1(0, _174494)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _174494)
^  Unify: (274) [user] mfix_vars1(0, _174494)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _174494)
   Call: (275) [system] 0=_174494
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _174496, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([509, 0], [509, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; fn metta_map_atom() {", 509, 0], [";; fn metta_map_atom() {", 509, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn metta_map_atom() {", 509, 0], [";; fn metta_map_atom() {", 509, 0])
   Call: (270) [system] compound_name_arguments(_68668, '$COMMENT', [";; fn metta_map_atom() {", 509, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT', [";; fn metta_map_atom() {", 509, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0)))
   Call: (267) [system] '$COMMENT'(";; fn metta_map_atom() {", 509, 0)\=@='$COMMENT'(";; fn metta_map_atom() {", 509, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _63082)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _224668))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _224668))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _224668))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _224668))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _224668)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _224668)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _230254))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _230254))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _230254)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _230254)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _230254)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0)))
   Call: (267) [system] '$COMMENT'(";; fn metta_map_atom() {", 509, 0)\=@='$COMMENT'(";; fn metta_map_atom() {", 509, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _224668)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _57470))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _57470))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _57470))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _57470))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _57470)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _57470)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _252574))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _252574))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _252574)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _252574)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _252574)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0)))
   Call: (267) [system] '$COMMENT'(";; fn metta_map_atom() {", 509, 0)\=@='$COMMENT'(";; fn metta_map_atom() {", 509, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _57470)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0)))
   Call: (261) [system] '$COMMENT'(";; fn metta_map_atom() {", 509, 0)\=@='$COMMENT'(";; fn metta_map_atom() {", 509, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _281352, [], _281354)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _281352, [], _281354)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _281352, [], _281354)
   Call: (258) [system] atom('$COMMENT'(";; fn metta_map_atom() {", 509, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _281352, [], _281354)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _281352, [], _281354)
   Call: (258) [system] compound('$COMMENT'(";; fn metta_map_atom() {", 509, 0))
   Exit: (258) [system] compound('$COMMENT'(";; fn metta_map_atom() {", 509, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; fn metta_map_atom() {", 509, 0), _290668, _290670)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT', [";; fn metta_map_atom() {", 509, 0])
^  Call: (258) [user] subst_vars([";; fn metta_map_atom() {", 509, 0], _292554, [], _281354)
^  Unify: (258) [user] subst_vars([";; fn metta_map_atom() {", 509, 0], [";; fn metta_map_atom() {", 509, 0], [], [])
   Call: (259) [system] var([";; fn metta_map_atom() {", 509, 0])
^  Redo: (258) [user] subst_vars([";; fn metta_map_atom() {", 509, 0], _292554, [], _281354)
^  Unify: (258) [user] subst_vars([";; fn metta_map_atom() {", 509, 0], [_296290|_296292], [], _281354)
^  Call: (259) [user] subst_vars(";; fn metta_map_atom() {", _296290, [], _297230)
^  Unify: (259) [user] subst_vars(";; fn metta_map_atom() {", ";; fn metta_map_atom() {", [], [])
   Call: (260) [system] var(";; fn metta_map_atom() {")
^  Redo: (259) [user] subst_vars(";; fn metta_map_atom() {", _296290, [], _297230)
^  Unify: (259) [user] subst_vars(";; fn metta_map_atom() {", _296290, [], _297230)
   Call: (260) [system] atom(";; fn metta_map_atom() {")
^  Redo: (259) [user] subst_vars(";; fn metta_map_atom() {", _296290, [], _297230)
^  Unify: (259) [user] subst_vars(";; fn metta_map_atom() {", _296290, [], _297230)
   Call: (260) [system] compound(";; fn metta_map_atom() {")
^  Redo: (259) [user] subst_vars(";; fn metta_map_atom() {", _296290, [], _297230)
^  Unify: (259) [user] subst_vars(";; fn metta_map_atom() {", ";; fn metta_map_atom() {", [], [])
^  Exit: (259) [user] subst_vars(";; fn metta_map_atom() {", ";; fn metta_map_atom() {", [], [])
^  Call: (259) [user] subst_vars([509, 0], _296292, [], _281354)
^  Unify: (259) [user] subst_vars([509, 0], [509, 0], [], [])
   Call: (260) [system] var([509, 0])
^  Redo: (259) [user] subst_vars([509, 0], _296292, [], _281354)
^  Unify: (259) [user] subst_vars([509, 0], [_312162|_312164], [], _281354)
^  Call: (260) [user] subst_vars(509, _312162, [], _313102)
^  Unify: (260) [user] subst_vars(509, 509, [], [])
   Call: (261) [system] var(509)
^  Redo: (260) [user] subst_vars(509, _312162, [], _313102)
^  Unify: (260) [user] subst_vars(509, _312162, [], _313102)
   Call: (261) [system] atom(509)
^  Redo: (260) [user] subst_vars(509, _312162, [], _313102)
^  Unify: (260) [user] subst_vars(509, _312162, [], _313102)
   Call: (261) [system] compound(509)
^  Redo: (260) [user] subst_vars(509, _312162, [], _313102)
^  Unify: (260) [user] subst_vars(509, 509, [], [])
^  Exit: (260) [user] subst_vars(509, 509, [], [])
^  Call: (260) [user] subst_vars([0], _312164, [], _281354)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _312164, [], _281354)
^  Unify: (260) [user] subst_vars([0], [_328034|_328036], [], _281354)
^  Call: (261) [user] subst_vars(0, _328034, [], _328974)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _328034, [], _328974)
^  Unify: (261) [user] subst_vars(0, _328034, [], _328974)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _328034, [], _328974)
^  Unify: (261) [user] subst_vars(0, _328034, [], _328974)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _328034, [], _328974)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _328036, [], _281354)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _328036, [], _281354)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([509, 0], [509, 0], [], [])
^  Exit: (258) [user] subst_vars([";; fn metta_map_atom() {", 509, 0], [";; fn metta_map_atom() {", 509, 0], [], [])
   Call: (258) [system] compound_name_arguments(_281352, '$COMMENT', [";; fn metta_map_atom() {", 509, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT', [";; fn metta_map_atom() {", 509, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; fn metta_map_atom() {", 509, 0), '$COMMENT'(";; fn metta_map_atom() {", 509, 0), [], [])
   Call: (257) [system] _351392=metta_file_buffer(+, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn metta_map_atom() {", 509, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(510, 0, 19250, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$stream_position'(19250, 510, 0, 19250)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _404132))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _404132))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _404132)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _404132)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _404132)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _404132)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _409744))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _409744))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _409744))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _409744))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _409744)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _409744)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _415330))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _415330))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _415330)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _415330)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _415330)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _415330)
   Call: (270) [system] var('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _415330)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$VAR'(_422790))
   Call: (270) [system] atom('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _415330)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _415330)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _415330)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _415330)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _415330)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _415330)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0)==[_432070, _432076]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _415330)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _415330)
   Call: (270) [system] is_list('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _415330)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _415330)
   Call: (270) [system] string('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _415330)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _415330)
   Call: (270) [system] compound('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _442272, _442274)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT', [";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0], _446014)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0], _446014)
   Call: (271) [apply] apply:maplist_([";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0], _446014, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0], [_448832|_448834], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _448832)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _448832)
   Call: (273) [system] var(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _448832)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", '$VAR'(_453478))
   Call: (273) [system] atom(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _448832)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _448832)
   Call: (273) [system] ";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));"==true
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _448832)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _448832)
   Call: (273) [system] ";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));"==false
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _448832)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _448832)
   Call: (273) [system] ";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));"==[_462758, _462764]
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _448832)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _448832)
   Call: (273) [system] is_list(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _448832)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _448832)
   Call: (273) [system] string(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));")
   Exit: (273) [system] string(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _448832)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _448832)
   Call: (273) [system] compound(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _448832)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _448832)
^  Call: (273) [user] symbol(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));")
^  Unify: (273) [user] symbol(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));")
   Call: (274) [system] atom(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));")
   Fail: (274) [system] atom(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));")
^  Fail: (273) [user] symbol(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _448832)
   Call: (273) [system] ";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));"=_448832
   Exit: (273) [system] ";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));"=";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));"
^  Exit: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", ";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));")
   Call: (272) [apply] apply:maplist_([510, 0], _448834, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([510, 0], [_486830|_486832], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(510, _486830)
^  Unify: (273) [user] mfix_vars1(510, _486830)
   Call: (274) [system] var(510)
^  Redo: (273) [user] mfix_vars1(510, _486830)
^  Unify: (273) [user] mfix_vars1(510, '$VAR'(_491476))
   Call: (274) [system] atom(510)
^  Redo: (273) [user] mfix_vars1(510, _486830)
^  Unify: (273) [user] mfix_vars1(510, _486830)
   Call: (274) [system] 510==true
^  Redo: (273) [user] mfix_vars1(510, _486830)
^  Unify: (273) [user] mfix_vars1(510, _486830)
   Call: (274) [system] 510==false
^  Redo: (273) [user] mfix_vars1(510, _486830)
^  Unify: (273) [user] mfix_vars1(510, _486830)
   Call: (274) [system] 510==[_500756, _500762]
^  Redo: (273) [user] mfix_vars1(510, _486830)
^  Unify: (273) [user] mfix_vars1(510, _486830)
   Call: (274) [system] is_list(510)
^  Redo: (273) [user] mfix_vars1(510, _486830)
^  Unify: (273) [user] mfix_vars1(510, _486830)
   Call: (274) [system] string(510)
^  Redo: (273) [user] mfix_vars1(510, _486830)
^  Unify: (273) [user] mfix_vars1(510, _486830)
   Call: (274) [system] compound(510)
^  Redo: (273) [user] mfix_vars1(510, _486830)
^  Unify: (273) [user] mfix_vars1(510, _486830)
^  Call: (274) [user] symbol(510)
^  Unify: (274) [user] symbol(510)
   Call: (275) [system] atom(510)
   Fail: (275) [system] atom(510)
^  Fail: (274) [user] symbol(510)
^  Redo: (273) [user] mfix_vars1(510, _486830)
   Call: (274) [system] 510=_486830
   Exit: (274) [system] 510=510
^  Exit: (273) [user] mfix_vars1(510, 510)
   Call: (273) [apply] apply:maplist_([0], _486832, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_521156|_521158], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _521156)
^  Unify: (274) [user] mfix_vars1(0, _521156)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _6058)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_7860))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _6058)
^  Unify: (274) [user] mfix_vars1(0, _6058)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _6058)
^  Unify: (274) [user] mfix_vars1(0, _6058)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _6058)
^  Unify: (274) [user] mfix_vars1(0, _6058)
   Call: (275) [system] 0==[_17140, _17146]
^  Redo: (274) [user] mfix_vars1(0, _6058)
^  Unify: (274) [user] mfix_vars1(0, _6058)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _6058)
^  Unify: (274) [user] mfix_vars1(0, _6058)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _6058)
^  Unify: (274) [user] mfix_vars1(0, _6058)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _6058)
^  Unify: (274) [user] mfix_vars1(0, _6058)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6058)
   Call: (275) [system] 0=_6058
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6060, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([510, 0], [510, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0], [";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0], [";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0])
   Call: (270) [system] compound_name_arguments(_6000, '$COMMENT', [";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT', [";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0)\=@='$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _5986)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _53388))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _53388))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _53388))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _53388))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _53388)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _53388)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _58974))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _58974))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _58974)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _58974)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _58974)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0)\=@='$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _53388)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _5966))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _5966))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _5966))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _5966))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _5966)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _5966)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _81294))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _81294))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _81294)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _81294)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _81294)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0)\=@='$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _5966)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0)))
   Call: (261) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0)\=@='$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _110072, [], _110074)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _110072, [], _110074)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _110072, [], _110074)
   Call: (258) [system] atom('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _110072, [], _110074)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _110072, [], _110074)
   Call: (258) [system] compound('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), _119388, _119390)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT', [";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0])
^  Call: (258) [user] subst_vars([";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0], _121274, [], _110074)
^  Unify: (258) [user] subst_vars([";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0], [";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0], [], [])
   Call: (259) [system] var([";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0])
^  Redo: (258) [user] subst_vars([";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0], _121274, [], _110074)
^  Unify: (258) [user] subst_vars([";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0], [_125010|_125012], [], _110074)
^  Call: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _125010, [], _125950)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", ";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", [], [])
   Call: (260) [system] var(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _125010, [], _125950)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _125010, [], _125950)
   Call: (260) [system] atom(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _125010, [], _125950)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _125010, [], _125950)
   Call: (260) [system] compound(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", _125010, [], _125950)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", ";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", [], [])
^  Exit: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", ";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", [], [])
^  Call: (259) [user] subst_vars([510, 0], _125012, [], _110074)
^  Unify: (259) [user] subst_vars([510, 0], [510, 0], [], [])
   Call: (260) [system] var([510, 0])
^  Redo: (259) [user] subst_vars([510, 0], _125012, [], _110074)
^  Unify: (259) [user] subst_vars([510, 0], [_140882|_140884], [], _110074)
^  Call: (260) [user] subst_vars(510, _140882, [], _141822)
^  Unify: (260) [user] subst_vars(510, 510, [], [])
   Call: (261) [system] var(510)
^  Redo: (260) [user] subst_vars(510, _140882, [], _141822)
^  Unify: (260) [user] subst_vars(510, _140882, [], _141822)
   Call: (261) [system] atom(510)
^  Redo: (260) [user] subst_vars(510, _140882, [], _141822)
^  Unify: (260) [user] subst_vars(510, _140882, [], _141822)
   Call: (261) [system] compound(510)
^  Redo: (260) [user] subst_vars(510, _140882, [], _141822)
^  Unify: (260) [user] subst_vars(510, 510, [], [])
^  Exit: (260) [user] subst_vars(510, 510, [], [])
^  Call: (260) [user] subst_vars([0], _140884, [], _110074)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _140884, [], _110074)
^  Unify: (260) [user] subst_vars([0], [_156754|_156756], [], _110074)
^  Call: (261) [user] subst_vars(0, _156754, [], _157694)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _156754, [], _157694)
^  Unify: (261) [user] subst_vars(0, _156754, [], _157694)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _156754, [], _157694)
^  Unify: (261) [user] subst_vars(0, _156754, [], _157694)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _156754, [], _157694)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _156756, [], _110074)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _156756, [], _110074)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([510, 0], [510, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0], [";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0], [], [])
   Call: (258) [system] compound_name_arguments(_110072, '$COMMENT', [";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT', [";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), [], [])
   Call: (257) [system] _180112=metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom () $x ($x mapped)))\"), Ok(vec![vec![expr!()]]));", 510, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(511, 0, 19347, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$stream_position'(19347, 511, 0, 19347)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _232864))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _232864))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _232864)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _232864)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _232864)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _232864)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _238476))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _238476))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _238476))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _238476))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _238476)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _238476)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _244062))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _244062))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _244062)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _244062)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _244062)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _244062)
   Call: (270) [system] var('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _244062)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$VAR'(_251522))
   Call: (270) [system] atom('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _244062)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _244062)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _244062)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _244062)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _244062)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _244062)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0)==[_260802, _260808]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _244062)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _244062)
   Call: (270) [system] is_list('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _244062)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _244062)
   Call: (270) [system] string('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _244062)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _244062)
   Call: (270) [system] compound('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _271004, _271006)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT', [";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0], _274746)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0], _274746)
   Call: (271) [apply] apply:maplist_([";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0], _274746, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0], [_277564|_277566], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _277564)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _277564)
   Call: (273) [system] var(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _277564)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", '$VAR'(_282210))
   Call: (273) [system] atom(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _277564)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _277564)
   Call: (273) [system] ";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));"==true
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _277564)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _277564)
   Call: (273) [system] ";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));"==false
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _277564)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _277564)
   Call: (273) [system] ";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));"==[_291490, _291496]
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _277564)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _277564)
   Call: (273) [system] is_list(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _277564)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _277564)
   Call: (273) [system] string(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));")
   Exit: (273) [system] string(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _277564)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _277564)
   Call: (273) [system] compound(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _277564)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _277564)
^  Call: (273) [user] symbol(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));")
^  Unify: (273) [user] symbol(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));")
   Call: (274) [system] atom(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));")
   Fail: (274) [system] atom(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));")
^  Fail: (273) [user] symbol(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _277564)
   Call: (273) [system] ";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));"=_277564
   Exit: (273) [system] ";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));"=";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));"
^  Exit: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", ";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));")
   Call: (272) [apply] apply:maplist_([511, 0], _277566, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([511, 0], [_315562|_315564], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(511, _315562)
^  Unify: (273) [user] mfix_vars1(511, _315562)
   Call: (274) [system] var(511)
^  Redo: (273) [user] mfix_vars1(511, _315562)
^  Unify: (273) [user] mfix_vars1(511, '$VAR'(_320208))
   Call: (274) [system] atom(511)
^  Redo: (273) [user] mfix_vars1(511, _315562)
^  Unify: (273) [user] mfix_vars1(511, _315562)
   Call: (274) [system] 511==true
^  Redo: (273) [user] mfix_vars1(511, _315562)
^  Unify: (273) [user] mfix_vars1(511, _315562)
   Call: (274) [system] 511==false
^  Redo: (273) [user] mfix_vars1(511, _315562)
^  Unify: (273) [user] mfix_vars1(511, _315562)
   Call: (274) [system] 511==[_329488, _329494]
^  Redo: (273) [user] mfix_vars1(511, _315562)
^  Unify: (273) [user] mfix_vars1(511, _315562)
   Call: (274) [system] is_list(511)
^  Redo: (273) [user] mfix_vars1(511, _315562)
^  Unify: (273) [user] mfix_vars1(511, _315562)
   Call: (274) [system] string(511)
^  Redo: (273) [user] mfix_vars1(511, _315562)
^  Unify: (273) [user] mfix_vars1(511, _315562)
   Call: (274) [system] compound(511)
^  Redo: (273) [user] mfix_vars1(511, _315562)
^  Unify: (273) [user] mfix_vars1(511, _315562)
^  Call: (274) [user] symbol(511)
^  Unify: (274) [user] symbol(511)
   Call: (275) [system] atom(511)
   Fail: (275) [system] atom(511)
^  Fail: (274) [user] symbol(511)
^  Redo: (273) [user] mfix_vars1(511, _315562)
   Call: (274) [system] 511=_315562
   Exit: (274) [system] 511=511
^  Exit: (273) [user] mfix_vars1(511, 511)
   Call: (273) [apply] apply:maplist_([0], _315564, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_349888|_349890], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _349888)
^  Unify: (274) [user] mfix_vars1(0, _349888)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _349888)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_354534))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _349888)
^  Unify: (274) [user] mfix_vars1(0, _349888)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _349888)
^  Unify: (274) [user] mfix_vars1(0, _349888)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _349888)
^  Unify: (274) [user] mfix_vars1(0, _349888)
   Call: (275) [system] 0==[_363814, _363820]
^  Redo: (274) [user] mfix_vars1(0, _349888)
^  Unify: (274) [user] mfix_vars1(0, _349888)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _349888)
^  Unify: (274) [user] mfix_vars1(0, _349888)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _349888)
^  Unify: (274) [user] mfix_vars1(0, _349888)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _349888)
^  Unify: (274) [user] mfix_vars1(0, _349888)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _349888)
   Call: (275) [system] 0=_349888
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _349890, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([511, 0], [511, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0], [";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0], [";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0])
   Call: (270) [system] compound_name_arguments(_244062, '$COMMENT', [";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT', [";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0)\=@='$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _238476)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _400062))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _400062))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _400062))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _400062))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _400062)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _400062)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _405648))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _405648))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _405648)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _405648)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _405648)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0)\=@='$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _400062)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _232864))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _232864))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _232864))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _232864))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _232864)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _232864)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _427968))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _427968))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _427968)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _427968)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _427968)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0)\=@='$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _232864)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0)))
   Call: (261) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0)\=@='$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _456746, [], _456748)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _456746, [], _456748)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _456746, [], _456748)
   Call: (258) [system] atom('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _456746, [], _456748)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _456746, [], _456748)
   Call: (258) [system] compound('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), _466062, _466064)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT', [";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0])
^  Call: (258) [user] subst_vars([";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0], _467948, [], _456748)
^  Unify: (258) [user] subst_vars([";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0], [";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0], [], [])
   Call: (259) [system] var([";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0])
^  Redo: (258) [user] subst_vars([";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0], _467948, [], _456748)
^  Unify: (258) [user] subst_vars([";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0], [_471684|_471686], [], _456748)
^  Call: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _471684, [], _472624)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", ";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", [], [])
   Call: (260) [system] var(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _471684, [], _472624)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _471684, [], _472624)
   Call: (260) [system] atom(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _471684, [], _472624)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _471684, [], _472624)
   Call: (260) [system] compound(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", _471684, [], _472624)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", ";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", [], [])
^  Exit: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", ";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", [], [])
^  Call: (259) [user] subst_vars([511, 0], _471686, [], _456748)
^  Unify: (259) [user] subst_vars([511, 0], [511, 0], [], [])
   Call: (260) [system] var([511, 0])
^  Redo: (259) [user] subst_vars([511, 0], _471686, [], _456748)
^  Unify: (259) [user] subst_vars([511, 0], [_487556|_487558], [], _456748)
^  Call: (260) [user] subst_vars(511, _487556, [], _488496)
^  Unify: (260) [user] subst_vars(511, 511, [], [])
   Call: (261) [system] var(511)
^  Redo: (260) [user] subst_vars(511, _487556, [], _488496)
^  Unify: (260) [user] subst_vars(511, _487556, [], _488496)
   Call: (261) [system] atom(511)
^  Redo: (260) [user] subst_vars(511, _487556, [], _488496)
^  Unify: (260) [user] subst_vars(511, _487556, [], _488496)
   Call: (261) [system] compound(511)
^  Redo: (260) [user] subst_vars(511, _487556, [], _488496)
^  Unify: (260) [user] subst_vars(511, 511, [], [])
^  Exit: (260) [user] subst_vars(511, 511, [], [])
^  Call: (260) [user] subst_vars([0], _487558, [], _456748)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _487558, [], _456748)
^  Unify: (260) [user] subst_vars([0], [_503428|_503430], [], _456748)
^  Call: (261) [user] subst_vars(0, _503428, [], _504368)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _503428, [], _504368)
^  Unify: (261) [user] subst_vars(0, _503428, [], _504368)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _503428, [], _504368)
^  Unify: (261) [user] subst_vars(0, _503428, [], _504368)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _503428, [], _504368)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _503430, [], _456748)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _503430, [], _456748)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([511, 0], [511, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0], [";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5972, '$COMMENT', [";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT', [";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), [], [])
   Call: (257) [system] _8772=metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(eval (map-atom (a (b) $c) $x (mapped $x)))\"), Ok(vec![vec![expr!((\"mapped\" \"a\") (\"mapped\" (\"b\")) (\"mapped\" c))]]));", 511, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(512, 0, 19496, '$COMMENT'(";; }", 512, 0), '$stream_position'(19496, 512, 0, 19496)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 512, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 512, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; }", 512, 0), _61488))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 512, 0), _61488))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; }", 512, 0), _61488)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 512, 0), _61488)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; }", 512, 0), _61488)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; }", 512, 0), _61488)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; }", 512, 0), _67100))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 512, 0), _67100))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 512, 0), _67100))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 512, 0), _67100))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 512, 0), _67100)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 512, 0), _67100)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; }", 512, 0), _72686))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 512, 0), _72686))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; }", 512, 0), _72686)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 512, 0), _72686)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; }", 512, 0), _72686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 512, 0), _72686)
   Call: (270) [system] var('$COMMENT'(";; }", 512, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 512, 0), _72686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 512, 0), '$VAR'(_80146))
   Call: (270) [system] atom('$COMMENT'(";; }", 512, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 512, 0), _72686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 512, 0), _72686)
   Call: (270) [system] '$COMMENT'(";; }", 512, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 512, 0), _72686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 512, 0), _72686)
   Call: (270) [system] '$COMMENT'(";; }", 512, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 512, 0), _72686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 512, 0), _72686)
   Call: (270) [system] '$COMMENT'(";; }", 512, 0)==[_89426, _89432]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 512, 0), _72686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 512, 0), _72686)
   Call: (270) [system] is_list('$COMMENT'(";; }", 512, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 512, 0), _72686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 512, 0), _72686)
   Call: (270) [system] string('$COMMENT'(";; }", 512, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 512, 0), _72686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 512, 0), _72686)
   Call: (270) [system] compound('$COMMENT'(";; }", 512, 0))
   Exit: (270) [system] compound('$COMMENT'(";; }", 512, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; }", 512, 0), _99628, _99630)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 512, 0), '$COMMENT', [";; }", 512, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; }", 512, 0], _103370)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 512, 0], _103370)
   Call: (271) [apply] apply:maplist_([";; }", 512, 0], _103370, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; }", 512, 0], [_106188|_106190], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; }", _106188)
^  Unify: (272) [user] mfix_vars1(";; }", _106188)
   Call: (273) [system] var(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _106188)
^  Unify: (272) [user] mfix_vars1(";; }", '$VAR'(_110834))
   Call: (273) [system] atom(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _106188)
^  Unify: (272) [user] mfix_vars1(";; }", _106188)
   Call: (273) [system] ";; }"==true
^  Redo: (272) [user] mfix_vars1(";; }", _106188)
^  Unify: (272) [user] mfix_vars1(";; }", _106188)
   Call: (273) [system] ";; }"==false
^  Redo: (272) [user] mfix_vars1(";; }", _106188)
^  Unify: (272) [user] mfix_vars1(";; }", _106188)
   Call: (273) [system] ";; }"==[_120114, _120120]
^  Redo: (272) [user] mfix_vars1(";; }", _106188)
^  Unify: (272) [user] mfix_vars1(";; }", _106188)
   Call: (273) [system] is_list(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _106188)
^  Unify: (272) [user] mfix_vars1(";; }", _106188)
   Call: (273) [system] string(";; }")
   Exit: (273) [system] string(";; }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; }", _106188)
^  Unify: (272) [user] mfix_vars1(";; }", _106188)
   Call: (273) [system] compound(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _106188)
^  Unify: (272) [user] mfix_vars1(";; }", _106188)
^  Call: (273) [user] symbol(";; }")
^  Unify: (273) [user] symbol(";; }")
   Call: (274) [system] atom(";; }")
   Fail: (274) [system] atom(";; }")
^  Fail: (273) [user] symbol(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _106188)
   Call: (273) [system] ";; }"=_106188
   Exit: (273) [system] ";; }"=";; }"
^  Exit: (272) [user] mfix_vars1(";; }", ";; }")
   Call: (272) [apply] apply:maplist_([512, 0], _106190, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([512, 0], [_144186|_144188], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(512, _144186)
^  Unify: (273) [user] mfix_vars1(512, _144186)
   Call: (274) [system] var(512)
^  Redo: (273) [user] mfix_vars1(512, _144186)
^  Unify: (273) [user] mfix_vars1(512, '$VAR'(_148832))
   Call: (274) [system] atom(512)
^  Redo: (273) [user] mfix_vars1(512, _144186)
^  Unify: (273) [user] mfix_vars1(512, _144186)
   Call: (274) [system] 512==true
^  Redo: (273) [user] mfix_vars1(512, _144186)
^  Unify: (273) [user] mfix_vars1(512, _144186)
   Call: (274) [system] 512==false
^  Redo: (273) [user] mfix_vars1(512, _144186)
^  Unify: (273) [user] mfix_vars1(512, _144186)
   Call: (274) [system] 512==[_158112, _158118]
^  Redo: (273) [user] mfix_vars1(512, _144186)
^  Unify: (273) [user] mfix_vars1(512, _144186)
   Call: (274) [system] is_list(512)
^  Redo: (273) [user] mfix_vars1(512, _144186)
^  Unify: (273) [user] mfix_vars1(512, _144186)
   Call: (274) [system] string(512)
^  Redo: (273) [user] mfix_vars1(512, _144186)
^  Unify: (273) [user] mfix_vars1(512, _144186)
   Call: (274) [system] compound(512)
^  Redo: (273) [user] mfix_vars1(512, _144186)
^  Unify: (273) [user] mfix_vars1(512, _144186)
^  Call: (274) [user] symbol(512)
^  Unify: (274) [user] symbol(512)
   Call: (275) [system] atom(512)
   Fail: (275) [system] atom(512)
^  Fail: (274) [user] symbol(512)
^  Redo: (273) [user] mfix_vars1(512, _144186)
   Call: (274) [system] 512=_144186
   Exit: (274) [system] 512=512
^  Exit: (273) [user] mfix_vars1(512, 512)
   Call: (273) [apply] apply:maplist_([0], _144188, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_178512|_178514], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _178512)
^  Unify: (274) [user] mfix_vars1(0, _178512)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _178512)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_183158))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _178512)
^  Unify: (274) [user] mfix_vars1(0, _178512)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _178512)
^  Unify: (274) [user] mfix_vars1(0, _178512)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _178512)
^  Unify: (274) [user] mfix_vars1(0, _178512)
   Call: (275) [system] 0==[_192438, _192444]
^  Redo: (274) [user] mfix_vars1(0, _178512)
^  Unify: (274) [user] mfix_vars1(0, _178512)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _178512)
^  Unify: (274) [user] mfix_vars1(0, _178512)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _178512)
^  Unify: (274) [user] mfix_vars1(0, _178512)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _178512)
^  Unify: (274) [user] mfix_vars1(0, _178512)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _178512)
   Call: (275) [system] 0=_178512
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _178514, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([512, 0], [512, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; }", 512, 0], [";; }", 512, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 512, 0], [";; }", 512, 0])
   Call: (270) [system] compound_name_arguments(_72686, '$COMMENT', [";; }", 512, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 512, 0), '$COMMENT', [";; }", 512, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 512, 0)\=@='$COMMENT'(";; }", 512, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 512, 0), _67100)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; }", 512, 0), _228686))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 512, 0), _228686))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; }", 512, 0), _228686))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 512, 0), _228686))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 512, 0), _228686)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 512, 0), _228686)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; }", 512, 0), _234272))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 512, 0), _234272))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; }", 512, 0), _234272)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 512, 0), _234272)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; }", 512, 0), _234272)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 512, 0)\=@='$COMMENT'(";; }", 512, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 512, 0), _228686)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; }", 512, 0), _61488))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 512, 0), _61488))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; }", 512, 0), _61488))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 512, 0), _61488))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 512, 0), _61488)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 512, 0), _61488)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; }", 512, 0), _256592))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 512, 0), _256592))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; }", 512, 0), _256592)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 512, 0), _256592)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; }", 512, 0), _256592)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 512, 0)\=@='$COMMENT'(";; }", 512, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 512, 0), _61488)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0)))
   Call: (261) [system] '$COMMENT'(";; }", 512, 0)\=@='$COMMENT'(";; }", 512, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 512, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 512, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 512, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 512, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 512, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; }", 512, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; }", 512, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; }", 512, 0), _285370, [], _285372)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; }", 512, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 512, 0), _285370, [], _285372)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 512, 0), _285370, [], _285372)
   Call: (258) [system] atom('$COMMENT'(";; }", 512, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 512, 0), _285370, [], _285372)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 512, 0), _285370, [], _285372)
   Call: (258) [system] compound('$COMMENT'(";; }", 512, 0))
   Exit: (258) [system] compound('$COMMENT'(";; }", 512, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; }", 512, 0), _294686, _294688)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 512, 0), '$COMMENT', [";; }", 512, 0])
^  Call: (258) [user] subst_vars([";; }", 512, 0], _296572, [], _285372)
^  Unify: (258) [user] subst_vars([";; }", 512, 0], [";; }", 512, 0], [], [])
   Call: (259) [system] var([";; }", 512, 0])
^  Redo: (258) [user] subst_vars([";; }", 512, 0], _296572, [], _285372)
^  Unify: (258) [user] subst_vars([";; }", 512, 0], [_300308|_300310], [], _285372)
^  Call: (259) [user] subst_vars(";; }", _300308, [], _301248)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
   Call: (260) [system] var(";; }")
^  Redo: (259) [user] subst_vars(";; }", _300308, [], _301248)
^  Unify: (259) [user] subst_vars(";; }", _300308, [], _301248)
   Call: (260) [system] atom(";; }")
^  Redo: (259) [user] subst_vars(";; }", _300308, [], _301248)
^  Unify: (259) [user] subst_vars(";; }", _300308, [], _301248)
   Call: (260) [system] compound(";; }")
^  Redo: (259) [user] subst_vars(";; }", _300308, [], _301248)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Exit: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Call: (259) [user] subst_vars([512, 0], _300310, [], _285372)
^  Unify: (259) [user] subst_vars([512, 0], [512, 0], [], [])
   Call: (260) [system] var([512, 0])
^  Redo: (259) [user] subst_vars([512, 0], _300310, [], _285372)
^  Unify: (259) [user] subst_vars([512, 0], [_316180|_316182], [], _285372)
^  Call: (260) [user] subst_vars(512, _316180, [], _317120)
^  Unify: (260) [user] subst_vars(512, 512, [], [])
   Call: (261) [system] var(512)
^  Redo: (260) [user] subst_vars(512, _316180, [], _317120)
^  Unify: (260) [user] subst_vars(512, _316180, [], _317120)
   Call: (261) [system] atom(512)
^  Redo: (260) [user] subst_vars(512, _316180, [], _317120)
^  Unify: (260) [user] subst_vars(512, _316180, [], _317120)
   Call: (261) [system] compound(512)
^  Redo: (260) [user] subst_vars(512, _316180, [], _317120)
^  Unify: (260) [user] subst_vars(512, 512, [], [])
^  Exit: (260) [user] subst_vars(512, 512, [], [])
^  Call: (260) [user] subst_vars([0], _316182, [], _285372)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _316182, [], _285372)
^  Unify: (260) [user] subst_vars([0], [_332052|_332054], [], _285372)
^  Call: (261) [user] subst_vars(0, _332052, [], _332992)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _332052, [], _332992)
^  Unify: (261) [user] subst_vars(0, _332052, [], _332992)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _332052, [], _332992)
^  Unify: (261) [user] subst_vars(0, _332052, [], _332992)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _332052, [], _332992)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _332054, [], _285372)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _332054, [], _285372)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([512, 0], [512, 0], [], [])
^  Exit: (258) [user] subst_vars([";; }", 512, 0], [";; }", 512, 0], [], [])
   Call: (258) [system] compound_name_arguments(_285370, '$COMMENT', [";; }", 512, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 512, 0), '$COMMENT', [";; }", 512, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; }", 512, 0), '$COMMENT'(";; }", 512, 0), [], [])
   Call: (257) [system] _355410=metta_file_buffer(+, '$COMMENT'(";; }", 512, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; }", 512, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; }", 512, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 512, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 512, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 512, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 512, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 512, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 512, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(513, 0, 19501, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$stream_position'(19501, 513, 0, 19501)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _408148))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _408148))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _408148)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _408148)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _408148)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _408148)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _413760))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _413760))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _413760))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _413760))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _413760)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _413760)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _419346))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _419346))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _419346)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _419346)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _419346)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _419346)
   Call: (270) [system] var('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _419346)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$VAR'(_426806))
   Call: (270) [system] atom('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _419346)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _419346)
   Call: (270) [system] '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _419346)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _419346)
   Call: (270) [system] '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _419346)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _419346)
   Call: (270) [system] '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0)==[_436086, _436092]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _419346)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _419346)
   Call: (270) [system] is_list('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _419346)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _419346)
   Call: (270) [system] string('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _419346)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _419346)
   Call: (270) [system] compound('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _446288, _446290)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT', [";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0], _450030)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0], _450030)
   Call: (271) [apply] apply:maplist_([";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0], _450030, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0], [_452848|_452850], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Applying a function to each atom in a list and returning a new list with the results.", _452848)
^  Unify: (272) [user] mfix_vars1(";; Applying a function to each atom in a list and returning a new list with the results.", _452848)
   Call: (273) [system] var(";; Applying a function to each atom in a list and returning a new list with the results.")
^  Redo: (272) [user] mfix_vars1(";; Applying a function to each atom in a list and returning a new list with the results.", _452848)
^  Unify: (272) [user] mfix_vars1(";; Applying a function to each atom in a list and returning a new list with the results.", '$VAR'(_457494))
   Call: (273) [system] atom(";; Applying a function to each atom in a list and returning a new list with the results.")
^  Redo: (272) [user] mfix_vars1(";; Applying a function to each atom in a list and returning a new list with the results.", _452848)
^  Unify: (272) [user] mfix_vars1(";; Applying a function to each atom in a list and returning a new list with the results.", _452848)
   Call: (273) [system] ";; Applying a function to each atom in a list and returning a new list with the results."==true
^  Redo: (272) [user] mfix_vars1(";; Applying a function to each atom in a list and returning a new list with the results.", _452848)
^  Unify: (272) [user] mfix_vars1(";; Applying a function to each atom in a list and returning a new list with the results.", _452848)
   Call: (273) [system] ";; Applying a function to each atom in a list and returning a new list with the results."==false
^  Redo: (272) [user] mfix_vars1(";; Applying a function to each atom in a list and returning a new list with the results.", _452848)
^  Unify: (272) [user] mfix_vars1(";; Applying a function to each atom in a list and returning a new list with the results.", _452848)
   Call: (273) [system] ";; Applying a function to each atom in a list and returning a new list with the results."==[_466774, _466780]
^  Redo: (272) [user] mfix_vars1(";; Applying a function to each atom in a list and returning a new list with the results.", _452848)
^  Unify: (272) [user] mfix_vars1(";; Applying a function to each atom in a list and returning a new list with the results.", _452848)
   Call: (273) [system] is_list(";; Applying a function to each atom in a list and returning a new list with the results.")
^  Redo: (272) [user] mfix_vars1(";; Applying a function to each atom in a list and returning a new list with the results.", _452848)
^  Unify: (272) [user] mfix_vars1(";; Applying a function to each atom in a list and returning a new list with the results.", _452848)
   Call: (273) [system] string(";; Applying a function to each atom in a list and returning a new list with the results.")
   Exit: (273) [system] string(";; Applying a function to each atom in a list and returning a new list with the results.")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Applying a function to each atom in a list and returning a new list with the results.", _452848)
^  Unify: (272) [user] mfix_vars1(";; Applying a function to each atom in a list and returning a new list with the results.", _452848)
   Call: (273) [system] compound(";; Applying a function to each atom in a list and returning a new list with the results.")
^  Redo: (272) [user] mfix_vars1(";; Applying a function to each atom in a list and returning a new list with the results.", _452848)
^  Unify: (272) [user] mfix_vars1(";; Applying a function to each atom in a list and returning a new list with the results.", _452848)
^  Call: (273) [user] symbol(";; Applying a function to each atom in a list and returning a new list with the results.")
^  Unify: (273) [user] symbol(";; Applying a function to each atom in a list and returning a new list with the results.")
   Call: (274) [system] atom(";; Applying a function to each atom in a list and returning a new list with the results.")
   Fail: (274) [system] atom(";; Applying a function to each atom in a list and returning a new list with the results.")
^  Fail: (273) [user] symbol(";; Applying a function to each atom in a list and returning a new list with the results.")
^  Redo: (272) [user] mfix_vars1(";; Applying a function to each atom in a list and returning a new list with the results.", _452848)
   Call: (273) [system] ";; Applying a function to each atom in a list and returning a new list with the results."=_452848
   Exit: (273) [system] ";; Applying a function to each atom in a list and returning a new list with the results."=";; Applying a function to each atom in a list and returning a new list with the results."
^  Exit: (272) [user] mfix_vars1(";; Applying a function to each atom in a list and returning a new list with the results.", ";; Applying a function to each atom in a list and returning a new list with the results.")
   Call: (272) [apply] apply:maplist_([513, 0], _452850, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([513, 0], [_490846|_490848], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(513, _490846)
^  Unify: (273) [user] mfix_vars1(513, _490846)
   Call: (274) [system] var(513)
^  Redo: (273) [user] mfix_vars1(513, _490846)
^  Unify: (273) [user] mfix_vars1(513, '$VAR'(_495492))
   Call: (274) [system] atom(513)
^  Redo: (273) [user] mfix_vars1(513, _490846)
^  Unify: (273) [user] mfix_vars1(513, _490846)
   Call: (274) [system] 513==true
^  Redo: (273) [user] mfix_vars1(513, _490846)
^  Unify: (273) [user] mfix_vars1(513, _490846)
   Call: (274) [system] 513==false
^  Redo: (273) [user] mfix_vars1(513, _490846)
^  Unify: (273) [user] mfix_vars1(513, _490846)
   Call: (274) [system] 513==[_504772, _504778]
^  Redo: (273) [user] mfix_vars1(513, _490846)
^  Unify: (273) [user] mfix_vars1(513, _490846)
   Call: (274) [system] is_list(513)
^  Redo: (273) [user] mfix_vars1(513, _490846)
^  Unify: (273) [user] mfix_vars1(513, _490846)
   Call: (274) [system] string(513)
^  Redo: (273) [user] mfix_vars1(513, _490846)
^  Unify: (273) [user] mfix_vars1(513, _490846)
   Call: (274) [system] compound(513)
^  Redo: (273) [user] mfix_vars1(513, _490846)
^  Unify: (273) [user] mfix_vars1(513, _490846)
^  Call: (274) [user] symbol(513)
^  Unify: (274) [user] symbol(513)
   Call: (275) [system] atom(513)
   Fail: (275) [system] atom(513)
^  Fail: (274) [user] symbol(513)
^  Redo: (273) [user] mfix_vars1(513, _490846)
   Call: (274) [system] 513=_490846
   Exit: (274) [system] 513=513
^  Exit: (273) [user] mfix_vars1(513, 513)
   Call: (273) [apply] apply:maplist_([0], _6052, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_7340|_7342], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _7340)
^  Unify: (274) [user] mfix_vars1(0, _7340)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _7340)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_11986))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _7340)
^  Unify: (274) [user] mfix_vars1(0, _7340)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _7340)
^  Unify: (274) [user] mfix_vars1(0, _7340)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _7340)
^  Unify: (274) [user] mfix_vars1(0, _7340)
   Call: (275) [system] 0==[_21266, _21272]
^  Redo: (274) [user] mfix_vars1(0, _7340)
^  Unify: (274) [user] mfix_vars1(0, _7340)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _7340)
^  Unify: (274) [user] mfix_vars1(0, _7340)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _7340)
^  Unify: (274) [user] mfix_vars1(0, _7340)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _7340)
^  Unify: (274) [user] mfix_vars1(0, _7340)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _7340)
   Call: (275) [system] 0=_7340
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _7342, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([513, 0], [513, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0], [";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0], [";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0])
   Call: (270) [system] compound_name_arguments(_5998, '$COMMENT', [";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT', [";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0)))
   Call: (267) [system] '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0)\=@='$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _5984)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _57514))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _57514))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _57514))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _57514))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _57514)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _57514)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _63100))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _63100))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _63100)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _63100)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _63100)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0)))
   Call: (267) [system] '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0)\=@='$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _57514)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _5964))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _5964))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _5964))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _5964))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _5964)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _5964)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _85420))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _85420))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _85420)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _85420)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _85420)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0)))
   Call: (267) [system] '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0)\=@='$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _5964)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0)))
   Call: (261) [system] '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0)\=@='$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _114198, [], _114200)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _114198, [], _114200)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _114198, [], _114200)
   Call: (258) [system] atom('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _114198, [], _114200)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _114198, [], _114200)
   Call: (258) [system] compound('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), _123514, _123516)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT', [";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0])
^  Call: (258) [user] subst_vars([";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0], _125400, [], _114200)
^  Unify: (258) [user] subst_vars([";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0], [";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0], [], [])
   Call: (259) [system] var([";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0])
^  Redo: (258) [user] subst_vars([";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0], _125400, [], _114200)
^  Unify: (258) [user] subst_vars([";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0], [_129136|_129138], [], _114200)
^  Call: (259) [user] subst_vars(";; Applying a function to each atom in a list and returning a new list with the results.", _129136, [], _130076)
^  Unify: (259) [user] subst_vars(";; Applying a function to each atom in a list and returning a new list with the results.", ";; Applying a function to each atom in a list and returning a new list with the results.", [], [])
   Call: (260) [system] var(";; Applying a function to each atom in a list and returning a new list with the results.")
^  Redo: (259) [user] subst_vars(";; Applying a function to each atom in a list and returning a new list with the results.", _129136, [], _130076)
^  Unify: (259) [user] subst_vars(";; Applying a function to each atom in a list and returning a new list with the results.", _129136, [], _130076)
   Call: (260) [system] atom(";; Applying a function to each atom in a list and returning a new list with the results.")
^  Redo: (259) [user] subst_vars(";; Applying a function to each atom in a list and returning a new list with the results.", _129136, [], _130076)
^  Unify: (259) [user] subst_vars(";; Applying a function to each atom in a list and returning a new list with the results.", _129136, [], _130076)
   Call: (260) [system] compound(";; Applying a function to each atom in a list and returning a new list with the results.")
^  Redo: (259) [user] subst_vars(";; Applying a function to each atom in a list and returning a new list with the results.", _129136, [], _130076)
^  Unify: (259) [user] subst_vars(";; Applying a function to each atom in a list and returning a new list with the results.", ";; Applying a function to each atom in a list and returning a new list with the results.", [], [])
^  Exit: (259) [user] subst_vars(";; Applying a function to each atom in a list and returning a new list with the results.", ";; Applying a function to each atom in a list and returning a new list with the results.", [], [])
^  Call: (259) [user] subst_vars([513, 0], _129138, [], _114200)
^  Unify: (259) [user] subst_vars([513, 0], [513, 0], [], [])
   Call: (260) [system] var([513, 0])
^  Redo: (259) [user] subst_vars([513, 0], _129138, [], _114200)
^  Unify: (259) [user] subst_vars([513, 0], [_145008|_145010], [], _114200)
^  Call: (260) [user] subst_vars(513, _145008, [], _145948)
^  Unify: (260) [user] subst_vars(513, 513, [], [])
   Call: (261) [system] var(513)
^  Redo: (260) [user] subst_vars(513, _145008, [], _145948)
^  Unify: (260) [user] subst_vars(513, _145008, [], _145948)
   Call: (261) [system] atom(513)
^  Redo: (260) [user] subst_vars(513, _145008, [], _145948)
^  Unify: (260) [user] subst_vars(513, _145008, [], _145948)
   Call: (261) [system] compound(513)
^  Redo: (260) [user] subst_vars(513, _145008, [], _145948)
^  Unify: (260) [user] subst_vars(513, 513, [], [])
^  Exit: (260) [user] subst_vars(513, 513, [], [])
^  Call: (260) [user] subst_vars([0], _145010, [], _114200)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _145010, [], _114200)
^  Unify: (260) [user] subst_vars([0], [_160880|_160882], [], _114200)
^  Call: (261) [user] subst_vars(0, _160880, [], _161820)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _160880, [], _161820)
^  Unify: (261) [user] subst_vars(0, _160880, [], _161820)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _160880, [], _161820)
^  Unify: (261) [user] subst_vars(0, _160880, [], _161820)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _160880, [], _161820)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _160882, [], _114200)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _160882, [], _114200)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([513, 0], [513, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0], [";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0], [], [])
   Call: (258) [system] compound_name_arguments(_114198, '$COMMENT', [";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT', [";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), [], [])
   Call: (257) [system] _184238=metta_file_buffer(+, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Applying a function to each atom in a list and returning a new list with the results.", 513, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1109, 0, 40927, '$COMMENT'(";; Original:", 1109, 0), '$stream_position'(40927, 1109, 0, 40927)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1109, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1109, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1109, 0), _236956))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1109, 0), _236956))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1109, 0), _236956)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1109, 0), _236956)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1109, 0), _236956)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1109, 0), _236956)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1109, 0), _242568))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1109, 0), _242568))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1109, 0), _242568))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1109, 0), _242568))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1109, 0), _242568)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1109, 0), _242568)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1109, 0), _248154))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1109, 0), _248154))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1109, 0), _248154)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1109, 0), _248154)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1109, 0), _248154)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1109, 0), _248154)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1109, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1109, 0), _248154)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1109, 0), '$VAR'(_255614))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1109, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1109, 0), _248154)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1109, 0), _248154)
   Call: (270) [system] '$COMMENT'(";; Original:", 1109, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1109, 0), _248154)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1109, 0), _248154)
   Call: (270) [system] '$COMMENT'(";; Original:", 1109, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1109, 0), _248154)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1109, 0), _248154)
   Call: (270) [system] '$COMMENT'(";; Original:", 1109, 0)==[_264894, _264900]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1109, 0), _248154)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1109, 0), _248154)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1109, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1109, 0), _248154)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1109, 0), _248154)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1109, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1109, 0), _248154)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1109, 0), _248154)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1109, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1109, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1109, 0), _275096, _275098)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1109, 0), '$COMMENT', [";; Original:", 1109, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1109, 0], _278838)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1109, 0], _278838)
   Call: (271) [apply] apply:maplist_([";; Original:", 1109, 0], _278838, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1109, 0], [_281656|_281658], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _281656)
^  Unify: (272) [user] mfix_vars1(";; Original:", _281656)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _281656)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_286302))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _281656)
^  Unify: (272) [user] mfix_vars1(";; Original:", _281656)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _281656)
^  Unify: (272) [user] mfix_vars1(";; Original:", _281656)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _281656)
^  Unify: (272) [user] mfix_vars1(";; Original:", _281656)
   Call: (273) [system] ";; Original:"==[_295582, _295588]
^  Redo: (272) [user] mfix_vars1(";; Original:", _281656)
^  Unify: (272) [user] mfix_vars1(";; Original:", _281656)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _281656)
^  Unify: (272) [user] mfix_vars1(";; Original:", _281656)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _281656)
^  Unify: (272) [user] mfix_vars1(";; Original:", _281656)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _281656)
^  Unify: (272) [user] mfix_vars1(";; Original:", _281656)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _281656)
   Call: (273) [system] ";; Original:"=_281656
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1109, 0], _281658, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1109, 0], [_319654|_319656], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1109, _319654)
^  Unify: (273) [user] mfix_vars1(1109, _319654)
   Call: (274) [system] var(1109)
^  Redo: (273) [user] mfix_vars1(1109, _319654)
^  Unify: (273) [user] mfix_vars1(1109, '$VAR'(_324300))
   Call: (274) [system] atom(1109)
^  Redo: (273) [user] mfix_vars1(1109, _319654)
^  Unify: (273) [user] mfix_vars1(1109, _319654)
   Call: (274) [system] 1109==true
^  Redo: (273) [user] mfix_vars1(1109, _319654)
^  Unify: (273) [user] mfix_vars1(1109, _319654)
   Call: (274) [system] 1109==false
^  Redo: (273) [user] mfix_vars1(1109, _319654)
^  Unify: (273) [user] mfix_vars1(1109, _319654)
   Call: (274) [system] 1109==[_333580, _333586]
^  Redo: (273) [user] mfix_vars1(1109, _319654)
^  Unify: (273) [user] mfix_vars1(1109, _319654)
   Call: (274) [system] is_list(1109)
^  Redo: (273) [user] mfix_vars1(1109, _319654)
^  Unify: (273) [user] mfix_vars1(1109, _319654)
   Call: (274) [system] string(1109)
^  Redo: (273) [user] mfix_vars1(1109, _319654)
^  Unify: (273) [user] mfix_vars1(1109, _319654)
   Call: (274) [system] compound(1109)
^  Redo: (273) [user] mfix_vars1(1109, _319654)
^  Unify: (273) [user] mfix_vars1(1109, _319654)
^  Call: (274) [user] symbol(1109)
^  Unify: (274) [user] symbol(1109)
   Call: (275) [system] atom(1109)
   Fail: (275) [system] atom(1109)
^  Fail: (274) [user] symbol(1109)
^  Redo: (273) [user] mfix_vars1(1109, _319654)
   Call: (274) [system] 1109=_319654
   Exit: (274) [system] 1109=1109
^  Exit: (273) [user] mfix_vars1(1109, 1109)
   Call: (273) [apply] apply:maplist_([0], _319656, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_353980|_353982], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _353980)
^  Unify: (274) [user] mfix_vars1(0, _353980)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _353980)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_358626))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _353980)
^  Unify: (274) [user] mfix_vars1(0, _353980)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _353980)
^  Unify: (274) [user] mfix_vars1(0, _353980)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _353980)
^  Unify: (274) [user] mfix_vars1(0, _353980)
   Call: (275) [system] 0==[_367906, _367912]
^  Redo: (274) [user] mfix_vars1(0, _353980)
^  Unify: (274) [user] mfix_vars1(0, _353980)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _353980)
^  Unify: (274) [user] mfix_vars1(0, _353980)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _353980)
^  Unify: (274) [user] mfix_vars1(0, _353980)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _353980)
^  Unify: (274) [user] mfix_vars1(0, _353980)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _353980)
   Call: (275) [system] 0=_353980
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _353982, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1109, 0], [1109, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1109, 0], [";; Original:", 1109, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1109, 0], [";; Original:", 1109, 0])
   Call: (270) [system] compound_name_arguments(_248154, '$COMMENT', [";; Original:", 1109, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1109, 0), '$COMMENT', [";; Original:", 1109, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1109, 0)\=@='$COMMENT'(";; Original:", 1109, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1109, 0), _242568)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1109, 0), _404154))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1109, 0), _404154))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1109, 0), _404154))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1109, 0), _404154))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1109, 0), _404154)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1109, 0), _404154)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1109, 0), _409740))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1109, 0), _409740))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1109, 0), _409740)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1109, 0), _409740)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1109, 0), _409740)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1109, 0)\=@='$COMMENT'(";; Original:", 1109, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1109, 0), _404154)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1109, 0), _236956))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1109, 0), _236956))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1109, 0), _236956))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1109, 0), _236956))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1109, 0), _236956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1109, 0), _236956)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1109, 0), _432060))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1109, 0), _432060))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1109, 0), _432060)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1109, 0), _432060)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1109, 0), _432060)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1109, 0)\=@='$COMMENT'(";; Original:", 1109, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1109, 0), _236956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1109, 0)\=@='$COMMENT'(";; Original:", 1109, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1109, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1109, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1109, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1109, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1109, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1109, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1109, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1109, 0), _460838, [], _460840)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1109, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1109, 0), _460838, [], _460840)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1109, 0), _460838, [], _460840)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1109, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1109, 0), _460838, [], _460840)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1109, 0), _460838, [], _460840)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1109, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1109, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1109, 0), _470154, _470156)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1109, 0), '$COMMENT', [";; Original:", 1109, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1109, 0], _472040, [], _460840)
^  Unify: (258) [user] subst_vars([";; Original:", 1109, 0], [";; Original:", 1109, 0], [], [])
   Call: (259) [system] var([";; Original:", 1109, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1109, 0], _472040, [], _460840)
^  Unify: (258) [user] subst_vars([";; Original:", 1109, 0], [_475776|_475778], [], _460840)
^  Call: (259) [user] subst_vars(";; Original:", _475776, [], _476716)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _475776, [], _476716)
^  Unify: (259) [user] subst_vars(";; Original:", _475776, [], _476716)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _475776, [], _476716)
^  Unify: (259) [user] subst_vars(";; Original:", _475776, [], _476716)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _475776, [], _476716)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1109, 0], _475778, [], _460840)
^  Unify: (259) [user] subst_vars([1109, 0], [1109, 0], [], [])
   Call: (260) [system] var([1109, 0])
^  Redo: (259) [user] subst_vars([1109, 0], _475778, [], _460840)
^  Unify: (259) [user] subst_vars([1109, 0], [_491648|_491650], [], _460840)
^  Call: (260) [user] subst_vars(1109, _491648, [], _492588)
^  Unify: (260) [user] subst_vars(1109, 1109, [], [])
   Call: (261) [system] var(1109)
^  Redo: (260) [user] subst_vars(1109, _491648, [], _492588)
^  Unify: (260) [user] subst_vars(1109, _491648, [], _492588)
   Call: (261) [system] atom(1109)
^  Redo: (260) [user] subst_vars(1109, _491648, [], _492588)
^  Unify: (260) [user] subst_vars(1109, _491648, [], _492588)
   Call: (261) [system] compound(1109)
^  Redo: (260) [user] subst_vars(1109, _491648, [], _492588)
^  Unify: (260) [user] subst_vars(1109, 1109, [], [])
^  Exit: (260) [user] subst_vars(1109, 1109, [], [])
^  Call: (260) [user] subst_vars([0], _491650, [], _460840)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _491650, [], _460840)
^  Unify: (260) [user] subst_vars([0], [_507520|_507522], [], _460840)
^  Call: (261) [user] subst_vars(0, _507520, [], _508460)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _507520, [], _508460)
^  Unify: (261) [user] subst_vars(0, _507520, [], _508460)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _507520, [], _508460)
^  Unify: (261) [user] subst_vars(0, _507520, [], _508460)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _507520, [], _508460)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _507522, [], _460840)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _507522, [], _460840)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1109, 0], [1109, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1109, 0], [";; Original:", 1109, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5938, '$COMMENT', [";; Original:", 1109, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1109, 0), '$COMMENT', [";; Original:", 1109, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1109, 0), '$COMMENT'(";; Original:", 1109, 0), [], [])
   Call: (257) [system] _12938=metta_file_buffer(+, '$COMMENT'(";; Original:", 1109, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1109, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1109, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1109, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1109, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1109, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1109, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1109, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1109, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1110, 0, 40940, '$COMMENT'(";; #[test]", 1110, 0), '$stream_position'(40940, 1110, 0, 40940)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1110, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1110, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; #[test]", 1110, 0), _65656))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 1110, 0), _65656))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; #[test]", 1110, 0), _65656)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 1110, 0), _65656)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1110, 0), _65656)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1110, 0), _65656)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; #[test]", 1110, 0), _71268))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1110, 0), _71268))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1110, 0), _71268))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1110, 0), _71268))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1110, 0), _71268)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1110, 0), _71268)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; #[test]", 1110, 0), _76854))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 1110, 0), _76854))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; #[test]", 1110, 0), _76854)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 1110, 0), _76854)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1110, 0), _76854)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1110, 0), _76854)
   Call: (270) [system] var('$COMMENT'(";; #[test]", 1110, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1110, 0), _76854)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1110, 0), '$VAR'(_84314))
   Call: (270) [system] atom('$COMMENT'(";; #[test]", 1110, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1110, 0), _76854)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1110, 0), _76854)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1110, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1110, 0), _76854)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1110, 0), _76854)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1110, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1110, 0), _76854)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1110, 0), _76854)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1110, 0)==[_93594, _93600]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1110, 0), _76854)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1110, 0), _76854)
   Call: (270) [system] is_list('$COMMENT'(";; #[test]", 1110, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1110, 0), _76854)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1110, 0), _76854)
   Call: (270) [system] string('$COMMENT'(";; #[test]", 1110, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1110, 0), _76854)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1110, 0), _76854)
   Call: (270) [system] compound('$COMMENT'(";; #[test]", 1110, 0))
   Exit: (270) [system] compound('$COMMENT'(";; #[test]", 1110, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1110, 0), _103796, _103798)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1110, 0), '$COMMENT', [";; #[test]", 1110, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; #[test]", 1110, 0], _107538)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 1110, 0], _107538)
   Call: (271) [apply] apply:maplist_([";; #[test]", 1110, 0], _107538, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; #[test]", 1110, 0], [_110356|_110358], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; #[test]", _110356)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _110356)
   Call: (273) [system] var(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _110356)
^  Unify: (272) [user] mfix_vars1(";; #[test]", '$VAR'(_115002))
   Call: (273) [system] atom(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _110356)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _110356)
   Call: (273) [system] ";; #[test]"==true
^  Redo: (272) [user] mfix_vars1(";; #[test]", _110356)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _110356)
   Call: (273) [system] ";; #[test]"==false
^  Redo: (272) [user] mfix_vars1(";; #[test]", _110356)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _110356)
   Call: (273) [system] ";; #[test]"==[_124282, _124288]
^  Redo: (272) [user] mfix_vars1(";; #[test]", _110356)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _110356)
   Call: (273) [system] is_list(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _110356)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _110356)
   Call: (273) [system] string(";; #[test]")
   Exit: (273) [system] string(";; #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; #[test]", _110356)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _110356)
   Call: (273) [system] compound(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _110356)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _110356)
^  Call: (273) [user] symbol(";; #[test]")
^  Unify: (273) [user] symbol(";; #[test]")
   Call: (274) [system] atom(";; #[test]")
   Fail: (274) [system] atom(";; #[test]")
^  Fail: (273) [user] symbol(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _110356)
   Call: (273) [system] ";; #[test]"=_110356
   Exit: (273) [system] ";; #[test]"=";; #[test]"
^  Exit: (272) [user] mfix_vars1(";; #[test]", ";; #[test]")
   Call: (272) [apply] apply:maplist_([1110, 0], _110358, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1110, 0], [_148354|_148356], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1110, _148354)
^  Unify: (273) [user] mfix_vars1(1110, _148354)
   Call: (274) [system] var(1110)
^  Redo: (273) [user] mfix_vars1(1110, _148354)
^  Unify: (273) [user] mfix_vars1(1110, '$VAR'(_153000))
   Call: (274) [system] atom(1110)
^  Redo: (273) [user] mfix_vars1(1110, _148354)
^  Unify: (273) [user] mfix_vars1(1110, _148354)
   Call: (274) [system] 1110==true
^  Redo: (273) [user] mfix_vars1(1110, _148354)
^  Unify: (273) [user] mfix_vars1(1110, _148354)
   Call: (274) [system] 1110==false
^  Redo: (273) [user] mfix_vars1(1110, _148354)
^  Unify: (273) [user] mfix_vars1(1110, _148354)
   Call: (274) [system] 1110==[_162280, _162286]
^  Redo: (273) [user] mfix_vars1(1110, _148354)
^  Unify: (273) [user] mfix_vars1(1110, _148354)
   Call: (274) [system] is_list(1110)
^  Redo: (273) [user] mfix_vars1(1110, _148354)
^  Unify: (273) [user] mfix_vars1(1110, _148354)
   Call: (274) [system] string(1110)
^  Redo: (273) [user] mfix_vars1(1110, _148354)
^  Unify: (273) [user] mfix_vars1(1110, _148354)
   Call: (274) [system] compound(1110)
^  Redo: (273) [user] mfix_vars1(1110, _148354)
^  Unify: (273) [user] mfix_vars1(1110, _148354)
^  Call: (274) [user] symbol(1110)
^  Unify: (274) [user] symbol(1110)
   Call: (275) [system] atom(1110)
   Fail: (275) [system] atom(1110)
^  Fail: (274) [user] symbol(1110)
^  Redo: (273) [user] mfix_vars1(1110, _148354)
   Call: (274) [system] 1110=_148354
   Exit: (274) [system] 1110=1110
^  Exit: (273) [user] mfix_vars1(1110, 1110)
   Call: (273) [apply] apply:maplist_([0], _148356, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_182680|_182682], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _182680)
^  Unify: (274) [user] mfix_vars1(0, _182680)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _182680)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_187326))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _182680)
^  Unify: (274) [user] mfix_vars1(0, _182680)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _182680)
^  Unify: (274) [user] mfix_vars1(0, _182680)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _182680)
^  Unify: (274) [user] mfix_vars1(0, _182680)
   Call: (275) [system] 0==[_196606, _196612]
^  Redo: (274) [user] mfix_vars1(0, _182680)
^  Unify: (274) [user] mfix_vars1(0, _182680)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _182680)
^  Unify: (274) [user] mfix_vars1(0, _182680)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _182680)
^  Unify: (274) [user] mfix_vars1(0, _182680)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _182680)
^  Unify: (274) [user] mfix_vars1(0, _182680)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _182680)
   Call: (275) [system] 0=_182680
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _182682, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1110, 0], [1110, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; #[test]", 1110, 0], [";; #[test]", 1110, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 1110, 0], [";; #[test]", 1110, 0])
   Call: (270) [system] compound_name_arguments(_76854, '$COMMENT', [";; #[test]", 1110, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1110, 0), '$COMMENT', [";; #[test]", 1110, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1110, 0)\=@='$COMMENT'(";; #[test]", 1110, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1110, 0), _71268)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; #[test]", 1110, 0), _232854))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1110, 0), _232854))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1110, 0), _232854))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1110, 0), _232854))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1110, 0), _232854)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1110, 0), _232854)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; #[test]", 1110, 0), _238440))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 1110, 0), _238440))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; #[test]", 1110, 0), _238440)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 1110, 0), _238440)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1110, 0), _238440)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1110, 0)\=@='$COMMENT'(";; #[test]", 1110, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1110, 0), _232854)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; #[test]", 1110, 0), _65656))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1110, 0), _65656))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1110, 0), _65656))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1110, 0), _65656))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1110, 0), _65656)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1110, 0), _65656)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; #[test]", 1110, 0), _260760))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 1110, 0), _260760))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; #[test]", 1110, 0), _260760)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 1110, 0), _260760)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1110, 0), _260760)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1110, 0)\=@='$COMMENT'(";; #[test]", 1110, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1110, 0), _65656)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0)))
   Call: (261) [system] '$COMMENT'(";; #[test]", 1110, 0)\=@='$COMMENT'(";; #[test]", 1110, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1110, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1110, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1110, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1110, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1110, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1110, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1110, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1110, 0), _289538, [], _289540)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; #[test]", 1110, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1110, 0), _289538, [], _289540)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1110, 0), _289538, [], _289540)
   Call: (258) [system] atom('$COMMENT'(";; #[test]", 1110, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1110, 0), _289538, [], _289540)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1110, 0), _289538, [], _289540)
   Call: (258) [system] compound('$COMMENT'(";; #[test]", 1110, 0))
   Exit: (258) [system] compound('$COMMENT'(";; #[test]", 1110, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1110, 0), _298854, _298856)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1110, 0), '$COMMENT', [";; #[test]", 1110, 0])
^  Call: (258) [user] subst_vars([";; #[test]", 1110, 0], _300740, [], _289540)
^  Unify: (258) [user] subst_vars([";; #[test]", 1110, 0], [";; #[test]", 1110, 0], [], [])
   Call: (259) [system] var([";; #[test]", 1110, 0])
^  Redo: (258) [user] subst_vars([";; #[test]", 1110, 0], _300740, [], _289540)
^  Unify: (258) [user] subst_vars([";; #[test]", 1110, 0], [_304476|_304478], [], _289540)
^  Call: (259) [user] subst_vars(";; #[test]", _304476, [], _305416)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
   Call: (260) [system] var(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _304476, [], _305416)
^  Unify: (259) [user] subst_vars(";; #[test]", _304476, [], _305416)
   Call: (260) [system] atom(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _304476, [], _305416)
^  Unify: (259) [user] subst_vars(";; #[test]", _304476, [], _305416)
   Call: (260) [system] compound(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _304476, [], _305416)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Exit: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Call: (259) [user] subst_vars([1110, 0], _304478, [], _289540)
^  Unify: (259) [user] subst_vars([1110, 0], [1110, 0], [], [])
   Call: (260) [system] var([1110, 0])
^  Redo: (259) [user] subst_vars([1110, 0], _304478, [], _289540)
^  Unify: (259) [user] subst_vars([1110, 0], [_320348|_320350], [], _289540)
^  Call: (260) [user] subst_vars(1110, _320348, [], _321288)
^  Unify: (260) [user] subst_vars(1110, 1110, [], [])
   Call: (261) [system] var(1110)
^  Redo: (260) [user] subst_vars(1110, _320348, [], _321288)
^  Unify: (260) [user] subst_vars(1110, _320348, [], _321288)
   Call: (261) [system] atom(1110)
^  Redo: (260) [user] subst_vars(1110, _320348, [], _321288)
^  Unify: (260) [user] subst_vars(1110, _320348, [], _321288)
   Call: (261) [system] compound(1110)
^  Redo: (260) [user] subst_vars(1110, _320348, [], _321288)
^  Unify: (260) [user] subst_vars(1110, 1110, [], [])
^  Exit: (260) [user] subst_vars(1110, 1110, [], [])
^  Call: (260) [user] subst_vars([0], _320350, [], _289540)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _320350, [], _289540)
^  Unify: (260) [user] subst_vars([0], [_336220|_336222], [], _289540)
^  Call: (261) [user] subst_vars(0, _336220, [], _337160)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _336220, [], _337160)
^  Unify: (261) [user] subst_vars(0, _336220, [], _337160)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _336220, [], _337160)
^  Unify: (261) [user] subst_vars(0, _336220, [], _337160)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _336220, [], _337160)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _336222, [], _289540)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _336222, [], _289540)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1110, 0], [1110, 0], [], [])
^  Exit: (258) [user] subst_vars([";; #[test]", 1110, 0], [";; #[test]", 1110, 0], [], [])
   Call: (258) [system] compound_name_arguments(_289538, '$COMMENT', [";; #[test]", 1110, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1110, 0), '$COMMENT', [";; #[test]", 1110, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1110, 0), '$COMMENT'(";; #[test]", 1110, 0), [], [])
   Call: (257) [system] _359578=metta_file_buffer(+, '$COMMENT'(";; #[test]", 1110, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; #[test]", 1110, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; #[test]", 1110, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 1110, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 1110, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1110, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1110, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1110, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1110, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1111, 0, 40951, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$stream_position'(40951, 1111, 0, 40951)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _412302))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _412302))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _412302)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _412302)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _412302)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _412302)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _417914))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _417914))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _417914))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _417914))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _417914)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _417914)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _423500))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _423500))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _423500)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _423500)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _423500)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _423500)
   Call: (270) [system] var('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _423500)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$VAR'(_430960))
   Call: (270) [system] atom('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _423500)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _423500)
   Call: (270) [system] '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _423500)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _423500)
   Call: (270) [system] '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _423500)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _423500)
   Call: (270) [system] '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0)==[_440240, _440246]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _423500)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _423500)
   Call: (270) [system] is_list('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _423500)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _423500)
   Call: (270) [system] string('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _423500)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _423500)
   Call: (270) [system] compound('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
   Exit: (270) [system] compound('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _450442, _450444)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT', [";; fn test_return_bad_type_error() {", 1111, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; fn test_return_bad_type_error() {", 1111, 0], _454184)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn test_return_bad_type_error() {", 1111, 0], _454184)
   Call: (271) [apply] apply:maplist_([";; fn test_return_bad_type_error() {", 1111, 0], _454184, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; fn test_return_bad_type_error() {", 1111, 0], [_457002|_457004], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; fn test_return_bad_type_error() {", _457002)
^  Unify: (272) [user] mfix_vars1(";; fn test_return_bad_type_error() {", _457002)
   Call: (273) [system] var(";; fn test_return_bad_type_error() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_return_bad_type_error() {", _457002)
^  Unify: (272) [user] mfix_vars1(";; fn test_return_bad_type_error() {", '$VAR'(_461648))
   Call: (273) [system] atom(";; fn test_return_bad_type_error() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_return_bad_type_error() {", _457002)
^  Unify: (272) [user] mfix_vars1(";; fn test_return_bad_type_error() {", _457002)
   Call: (273) [system] ";; fn test_return_bad_type_error() {"==true
^  Redo: (272) [user] mfix_vars1(";; fn test_return_bad_type_error() {", _457002)
^  Unify: (272) [user] mfix_vars1(";; fn test_return_bad_type_error() {", _457002)
   Call: (273) [system] ";; fn test_return_bad_type_error() {"==false
^  Redo: (272) [user] mfix_vars1(";; fn test_return_bad_type_error() {", _457002)
^  Unify: (272) [user] mfix_vars1(";; fn test_return_bad_type_error() {", _457002)
   Call: (273) [system] ";; fn test_return_bad_type_error() {"==[_470928, _470934]
^  Redo: (272) [user] mfix_vars1(";; fn test_return_bad_type_error() {", _457002)
^  Unify: (272) [user] mfix_vars1(";; fn test_return_bad_type_error() {", _457002)
   Call: (273) [system] is_list(";; fn test_return_bad_type_error() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_return_bad_type_error() {", _457002)
^  Unify: (272) [user] mfix_vars1(";; fn test_return_bad_type_error() {", _457002)
   Call: (273) [system] string(";; fn test_return_bad_type_error() {")
   Exit: (273) [system] string(";; fn test_return_bad_type_error() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; fn test_return_bad_type_error() {", _457002)
^  Unify: (272) [user] mfix_vars1(";; fn test_return_bad_type_error() {", _457002)
   Call: (273) [system] compound(";; fn test_return_bad_type_error() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_return_bad_type_error() {", _457002)
^  Unify: (272) [user] mfix_vars1(";; fn test_return_bad_type_error() {", _457002)
^  Call: (273) [user] symbol(";; fn test_return_bad_type_error() {")
^  Unify: (273) [user] symbol(";; fn test_return_bad_type_error() {")
   Call: (274) [system] atom(";; fn test_return_bad_type_error() {")
   Fail: (274) [system] atom(";; fn test_return_bad_type_error() {")
^  Fail: (273) [user] symbol(";; fn test_return_bad_type_error() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_return_bad_type_error() {", _457002)
   Call: (273) [system] ";; fn test_return_bad_type_error() {"=_457002
   Exit: (273) [system] ";; fn test_return_bad_type_error() {"=";; fn test_return_bad_type_error() {"
^  Exit: (272) [user] mfix_vars1(";; fn test_return_bad_type_error() {", ";; fn test_return_bad_type_error() {")
   Call: (272) [apply] apply:maplist_([1111, 0], _457004, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1111, 0], [_495000|_495002], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1111, _495000)
^  Unify: (273) [user] mfix_vars1(1111, _495000)
   Call: (274) [system] var(1111)
^  Redo: (273) [user] mfix_vars1(1111, _495000)
^  Unify: (273) [user] mfix_vars1(1111, '$VAR'(_499646))
   Call: (274) [system] atom(1111)
^  Redo: (273) [user] mfix_vars1(1111, _495000)
^  Unify: (273) [user] mfix_vars1(1111, _495000)
   Call: (274) [system] 1111==true
^  Redo: (273) [user] mfix_vars1(1111, _495000)
^  Unify: (273) [user] mfix_vars1(1111, _495000)
   Call: (274) [system] 1111==false
^  Redo: (273) [user] mfix_vars1(1111, _495000)
^  Unify: (273) [user] mfix_vars1(1111, _495000)
   Call: (274) [system] 1111==[_508926, _508932]
^  Redo: (273) [user] mfix_vars1(1111, _495000)
^  Unify: (273) [user] mfix_vars1(1111, _495000)
   Call: (274) [system] is_list(1111)
^  Redo: (273) [user] mfix_vars1(1111, _495000)
^  Unify: (273) [user] mfix_vars1(1111, _495000)
   Call: (274) [system] string(1111)
^  Redo: (273) [user] mfix_vars1(1111, _495000)
^  Unify: (273) [user] mfix_vars1(1111, _495000)
   Call: (274) [system] compound(1111)
^  Redo: (273) [user] mfix_vars1(1111, _495000)
^  Unify: (273) [user] mfix_vars1(1111, _495000)
^  Call: (274) [user] symbol(1111)
^  Unify: (274) [user] symbol(1111)
   Call: (275) [system] atom(1111)
   Fail: (275) [system] atom(1111)
^  Fail: (274) [user] symbol(1111)
^  Redo: (273) [user] mfix_vars1(1111, _6036)
   Call: (274) [system] 1111=_6036
   Exit: (274) [system] 1111=1111
^  Exit: (273) [user] mfix_vars1(1111, 1111)
   Call: (273) [apply] apply:maplist_([0], _6038, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_11432|_11434], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _11432)
^  Unify: (274) [user] mfix_vars1(0, _11432)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _11432)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_16078))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _11432)
^  Unify: (274) [user] mfix_vars1(0, _11432)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _11432)
^  Unify: (274) [user] mfix_vars1(0, _11432)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _11432)
^  Unify: (274) [user] mfix_vars1(0, _11432)
   Call: (275) [system] 0==[_25358, _25364]
^  Redo: (274) [user] mfix_vars1(0, _11432)
^  Unify: (274) [user] mfix_vars1(0, _11432)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _11432)
^  Unify: (274) [user] mfix_vars1(0, _11432)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _11432)
^  Unify: (274) [user] mfix_vars1(0, _11432)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _11432)
^  Unify: (274) [user] mfix_vars1(0, _11432)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _11432)
   Call: (275) [system] 0=_11432
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _11434, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1111, 0], [1111, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; fn test_return_bad_type_error() {", 1111, 0], [";; fn test_return_bad_type_error() {", 1111, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn test_return_bad_type_error() {", 1111, 0], [";; fn test_return_bad_type_error() {", 1111, 0])
   Call: (270) [system] compound_name_arguments(_5984, '$COMMENT', [";; fn test_return_bad_type_error() {", 1111, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT', [";; fn test_return_bad_type_error() {", 1111, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0)\=@='$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _5970)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _61606))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _61606))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _61606))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _61606))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _61606)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _61606)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _67192))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _67192))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _67192)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _67192)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _67192)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0)\=@='$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _61606)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _89512))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _89512))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _89512)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _89512)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _89512)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0)\=@='$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0)))
   Call: (261) [system] '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0)\=@='$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _118290, [], _118292)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _118290, [], _118292)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _118290, [], _118292)
   Call: (258) [system] atom('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _118290, [], _118292)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _118290, [], _118292)
   Call: (258) [system] compound('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
   Exit: (258) [system] compound('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), _127606, _127608)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT', [";; fn test_return_bad_type_error() {", 1111, 0])
^  Call: (258) [user] subst_vars([";; fn test_return_bad_type_error() {", 1111, 0], _129492, [], _118292)
^  Unify: (258) [user] subst_vars([";; fn test_return_bad_type_error() {", 1111, 0], [";; fn test_return_bad_type_error() {", 1111, 0], [], [])
   Call: (259) [system] var([";; fn test_return_bad_type_error() {", 1111, 0])
^  Redo: (258) [user] subst_vars([";; fn test_return_bad_type_error() {", 1111, 0], _129492, [], _118292)
^  Unify: (258) [user] subst_vars([";; fn test_return_bad_type_error() {", 1111, 0], [_133228|_133230], [], _118292)
^  Call: (259) [user] subst_vars(";; fn test_return_bad_type_error() {", _133228, [], _134168)
^  Unify: (259) [user] subst_vars(";; fn test_return_bad_type_error() {", ";; fn test_return_bad_type_error() {", [], [])
   Call: (260) [system] var(";; fn test_return_bad_type_error() {")
^  Redo: (259) [user] subst_vars(";; fn test_return_bad_type_error() {", _133228, [], _134168)
^  Unify: (259) [user] subst_vars(";; fn test_return_bad_type_error() {", _133228, [], _134168)
   Call: (260) [system] atom(";; fn test_return_bad_type_error() {")
^  Redo: (259) [user] subst_vars(";; fn test_return_bad_type_error() {", _133228, [], _134168)
^  Unify: (259) [user] subst_vars(";; fn test_return_bad_type_error() {", _133228, [], _134168)
   Call: (260) [system] compound(";; fn test_return_bad_type_error() {")
^  Redo: (259) [user] subst_vars(";; fn test_return_bad_type_error() {", _133228, [], _134168)
^  Unify: (259) [user] subst_vars(";; fn test_return_bad_type_error() {", ";; fn test_return_bad_type_error() {", [], [])
^  Exit: (259) [user] subst_vars(";; fn test_return_bad_type_error() {", ";; fn test_return_bad_type_error() {", [], [])
^  Call: (259) [user] subst_vars([1111, 0], _133230, [], _118292)
^  Unify: (259) [user] subst_vars([1111, 0], [1111, 0], [], [])
   Call: (260) [system] var([1111, 0])
^  Redo: (259) [user] subst_vars([1111, 0], _133230, [], _118292)
^  Unify: (259) [user] subst_vars([1111, 0], [_149100|_149102], [], _118292)
^  Call: (260) [user] subst_vars(1111, _149100, [], _150040)
^  Unify: (260) [user] subst_vars(1111, 1111, [], [])
   Call: (261) [system] var(1111)
^  Redo: (260) [user] subst_vars(1111, _149100, [], _150040)
^  Unify: (260) [user] subst_vars(1111, _149100, [], _150040)
   Call: (261) [system] atom(1111)
^  Redo: (260) [user] subst_vars(1111, _149100, [], _150040)
^  Unify: (260) [user] subst_vars(1111, _149100, [], _150040)
   Call: (261) [system] compound(1111)
^  Redo: (260) [user] subst_vars(1111, _149100, [], _150040)
^  Unify: (260) [user] subst_vars(1111, 1111, [], [])
^  Exit: (260) [user] subst_vars(1111, 1111, [], [])
^  Call: (260) [user] subst_vars([0], _149102, [], _118292)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _149102, [], _118292)
^  Unify: (260) [user] subst_vars([0], [_164972|_164974], [], _118292)
^  Call: (261) [user] subst_vars(0, _164972, [], _165912)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _164972, [], _165912)
^  Unify: (261) [user] subst_vars(0, _164972, [], _165912)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _164972, [], _165912)
^  Unify: (261) [user] subst_vars(0, _164972, [], _165912)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _164972, [], _165912)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _164974, [], _118292)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _164974, [], _118292)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1111, 0], [1111, 0], [], [])
^  Exit: (258) [user] subst_vars([";; fn test_return_bad_type_error() {", 1111, 0], [";; fn test_return_bad_type_error() {", 1111, 0], [], [])
   Call: (258) [system] compound_name_arguments(_118290, '$COMMENT', [";; fn test_return_bad_type_error() {", 1111, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT', [";; fn test_return_bad_type_error() {", 1111, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), [], [])
   Call: (257) [system] _188330=metta_file_buffer(+, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_return_bad_type_error() {", 1111, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1112, 0, 40988, '$COMMENT'(";;     let program1 = \"", 1112, 0), '$stream_position'(40988, 1112, 0, 40988)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program1 = \"", 1112, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program1 = \"", 1112, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     let program1 = \"", 1112, 0), _241052))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let program1 = \"", 1112, 0), _241052))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     let program1 = \"", 1112, 0), _241052)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let program1 = \"", 1112, 0), _241052)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     let program1 = \"", 1112, 0), _241052)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     let program1 = \"", 1112, 0), _241052)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1112, 0), _246664))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1112, 0), _246664))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1112, 0), _246664))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1112, 0), _246664))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1112, 0), _246664)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1112, 0), _246664)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1112, 0), _252250))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1112, 0), _252250))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1112, 0), _252250)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1112, 0), _252250)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1112, 0), _252250)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1112, 0), _252250)
   Call: (270) [system] var('$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1112, 0), _252250)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1112, 0), '$VAR'(_259710))
   Call: (270) [system] atom('$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1112, 0), _252250)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1112, 0), _252250)
   Call: (270) [system] '$COMMENT'(";;     let program1 = \"", 1112, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1112, 0), _252250)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1112, 0), _252250)
   Call: (270) [system] '$COMMENT'(";;     let program1 = \"", 1112, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1112, 0), _252250)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1112, 0), _252250)
   Call: (270) [system] '$COMMENT'(";;     let program1 = \"", 1112, 0)==[_268990, _268996]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1112, 0), _252250)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1112, 0), _252250)
   Call: (270) [system] is_list('$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1112, 0), _252250)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1112, 0), _252250)
   Call: (270) [system] string('$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1112, 0), _252250)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1112, 0), _252250)
   Call: (270) [system] compound('$COMMENT'(";;     let program1 = \"", 1112, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     let program1 = \"", 1112, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     let program1 = \"", 1112, 0), _279192, _279194)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT', [";;     let program1 = \"", 1112, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     let program1 = \"", 1112, 0], _282934)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let program1 = \"", 1112, 0], _282934)
   Call: (271) [apply] apply:maplist_([";;     let program1 = \"", 1112, 0], _282934, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     let program1 = \"", 1112, 0], [_285752|_285754], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     let program1 = \"", _285752)
^  Unify: (272) [user] mfix_vars1(";;     let program1 = \"", _285752)
   Call: (273) [system] var(";;     let program1 = \"")
^  Redo: (272) [user] mfix_vars1(";;     let program1 = \"", _285752)
^  Unify: (272) [user] mfix_vars1(";;     let program1 = \"", '$VAR'(_290398))
   Call: (273) [system] atom(";;     let program1 = \"")
^  Redo: (272) [user] mfix_vars1(";;     let program1 = \"", _285752)
^  Unify: (272) [user] mfix_vars1(";;     let program1 = \"", _285752)
   Call: (273) [system] ";;     let program1 = \""==true
^  Redo: (272) [user] mfix_vars1(";;     let program1 = \"", _285752)
^  Unify: (272) [user] mfix_vars1(";;     let program1 = \"", _285752)
   Call: (273) [system] ";;     let program1 = \""==false
^  Redo: (272) [user] mfix_vars1(";;     let program1 = \"", _285752)
^  Unify: (272) [user] mfix_vars1(";;     let program1 = \"", _285752)
   Call: (273) [system] ";;     let program1 = \""==[_299678, _299684]
^  Redo: (272) [user] mfix_vars1(";;     let program1 = \"", _285752)
^  Unify: (272) [user] mfix_vars1(";;     let program1 = \"", _285752)
   Call: (273) [system] is_list(";;     let program1 = \"")
^  Redo: (272) [user] mfix_vars1(";;     let program1 = \"", _285752)
^  Unify: (272) [user] mfix_vars1(";;     let program1 = \"", _285752)
   Call: (273) [system] string(";;     let program1 = \"")
   Exit: (273) [system] string(";;     let program1 = \"")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     let program1 = \"", _285752)
^  Unify: (272) [user] mfix_vars1(";;     let program1 = \"", _285752)
   Call: (273) [system] compound(";;     let program1 = \"")
^  Redo: (272) [user] mfix_vars1(";;     let program1 = \"", _285752)
^  Unify: (272) [user] mfix_vars1(";;     let program1 = \"", _285752)
^  Call: (273) [user] symbol(";;     let program1 = \"")
^  Unify: (273) [user] symbol(";;     let program1 = \"")
   Call: (274) [system] atom(";;     let program1 = \"")
   Fail: (274) [system] atom(";;     let program1 = \"")
^  Fail: (273) [user] symbol(";;     let program1 = \"")
^  Redo: (272) [user] mfix_vars1(";;     let program1 = \"", _285752)
   Call: (273) [system] ";;     let program1 = \""=_285752
   Exit: (273) [system] ";;     let program1 = \""=";;     let program1 = \""
^  Exit: (272) [user] mfix_vars1(";;     let program1 = \"", ";;     let program1 = \"")
   Call: (272) [apply] apply:maplist_([1112, 0], _285754, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1112, 0], [_323750|_323752], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1112, _323750)
^  Unify: (273) [user] mfix_vars1(1112, _323750)
   Call: (274) [system] var(1112)
^  Redo: (273) [user] mfix_vars1(1112, _323750)
^  Unify: (273) [user] mfix_vars1(1112, '$VAR'(_328396))
   Call: (274) [system] atom(1112)
^  Redo: (273) [user] mfix_vars1(1112, _323750)
^  Unify: (273) [user] mfix_vars1(1112, _323750)
   Call: (274) [system] 1112==true
^  Redo: (273) [user] mfix_vars1(1112, _323750)
^  Unify: (273) [user] mfix_vars1(1112, _323750)
   Call: (274) [system] 1112==false
^  Redo: (273) [user] mfix_vars1(1112, _323750)
^  Unify: (273) [user] mfix_vars1(1112, _323750)
   Call: (274) [system] 1112==[_337676, _337682]
^  Redo: (273) [user] mfix_vars1(1112, _323750)
^  Unify: (273) [user] mfix_vars1(1112, _323750)
   Call: (274) [system] is_list(1112)
^  Redo: (273) [user] mfix_vars1(1112, _323750)
^  Unify: (273) [user] mfix_vars1(1112, _323750)
   Call: (274) [system] string(1112)
^  Redo: (273) [user] mfix_vars1(1112, _323750)
^  Unify: (273) [user] mfix_vars1(1112, _323750)
   Call: (274) [system] compound(1112)
^  Redo: (273) [user] mfix_vars1(1112, _323750)
^  Unify: (273) [user] mfix_vars1(1112, _323750)
^  Call: (274) [user] symbol(1112)
^  Unify: (274) [user] symbol(1112)
   Call: (275) [system] atom(1112)
   Fail: (275) [system] atom(1112)
^  Fail: (274) [user] symbol(1112)
^  Redo: (273) [user] mfix_vars1(1112, _323750)
   Call: (274) [system] 1112=_323750
   Exit: (274) [system] 1112=1112
^  Exit: (273) [user] mfix_vars1(1112, 1112)
   Call: (273) [apply] apply:maplist_([0], _323752, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_358076|_358078], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _358076)
^  Unify: (274) [user] mfix_vars1(0, _358076)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _358076)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_362722))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _358076)
^  Unify: (274) [user] mfix_vars1(0, _358076)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _358076)
^  Unify: (274) [user] mfix_vars1(0, _358076)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _358076)
^  Unify: (274) [user] mfix_vars1(0, _358076)
   Call: (275) [system] 0==[_372002, _372008]
^  Redo: (274) [user] mfix_vars1(0, _358076)
^  Unify: (274) [user] mfix_vars1(0, _358076)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _358076)
^  Unify: (274) [user] mfix_vars1(0, _358076)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _358076)
^  Unify: (274) [user] mfix_vars1(0, _358076)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _358076)
^  Unify: (274) [user] mfix_vars1(0, _358076)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _358076)
   Call: (275) [system] 0=_358076
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _358078, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1112, 0], [1112, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     let program1 = \"", 1112, 0], [";;     let program1 = \"", 1112, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let program1 = \"", 1112, 0], [";;     let program1 = \"", 1112, 0])
   Call: (270) [system] compound_name_arguments(_252250, '$COMMENT', [";;     let program1 = \"", 1112, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT', [";;     let program1 = \"", 1112, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0)))
   Call: (267) [system] '$COMMENT'(";;     let program1 = \"", 1112, 0)\=@='$COMMENT'(";;     let program1 = \"", 1112, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1112, 0), _246664)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1112, 0), _408250))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1112, 0), _408250))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1112, 0), _408250))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1112, 0), _408250))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1112, 0), _408250)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1112, 0), _408250)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1112, 0), _413836))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1112, 0), _413836))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1112, 0), _413836)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let program1 = \"", 1112, 0), _413836)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     let program1 = \"", 1112, 0), _413836)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0)))
   Call: (267) [system] '$COMMENT'(";;     let program1 = \"", 1112, 0)\=@='$COMMENT'(";;     let program1 = \"", 1112, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1112, 0), _408250)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1112, 0), _241052))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1112, 0), _241052))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1112, 0), _241052))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1112, 0), _241052))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1112, 0), _241052)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1112, 0), _241052)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1112, 0), _436156))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1112, 0), _436156))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1112, 0), _436156)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let program1 = \"", 1112, 0), _436156)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     let program1 = \"", 1112, 0), _436156)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0)))
   Call: (267) [system] '$COMMENT'(";;     let program1 = \"", 1112, 0)\=@='$COMMENT'(";;     let program1 = \"", 1112, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1112, 0), _241052)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0)))
   Call: (261) [system] '$COMMENT'(";;     let program1 = \"", 1112, 0)\=@='$COMMENT'(";;     let program1 = \"", 1112, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program1 = \"", 1112, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program1 = \"", 1112, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program1 = \"", 1112, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program1 = \"", 1112, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program1 = \"", 1112, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     let program1 = \"", 1112, 0), _464934, [], _464936)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let program1 = \"", 1112, 0), _464934, [], _464936)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let program1 = \"", 1112, 0), _464934, [], _464936)
   Call: (258) [system] atom('$COMMENT'(";;     let program1 = \"", 1112, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let program1 = \"", 1112, 0), _464934, [], _464936)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let program1 = \"", 1112, 0), _464934, [], _464936)
   Call: (258) [system] compound('$COMMENT'(";;     let program1 = \"", 1112, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     let program1 = \"", 1112, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     let program1 = \"", 1112, 0), _474250, _474252)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT', [";;     let program1 = \"", 1112, 0])
^  Call: (258) [user] subst_vars([";;     let program1 = \"", 1112, 0], _476136, [], _464936)
^  Unify: (258) [user] subst_vars([";;     let program1 = \"", 1112, 0], [";;     let program1 = \"", 1112, 0], [], [])
   Call: (259) [system] var([";;     let program1 = \"", 1112, 0])
^  Redo: (258) [user] subst_vars([";;     let program1 = \"", 1112, 0], _476136, [], _464936)
^  Unify: (258) [user] subst_vars([";;     let program1 = \"", 1112, 0], [_479872|_479874], [], _464936)
^  Call: (259) [user] subst_vars(";;     let program1 = \"", _479872, [], _480812)
^  Unify: (259) [user] subst_vars(";;     let program1 = \"", ";;     let program1 = \"", [], [])
   Call: (260) [system] var(";;     let program1 = \"")
^  Redo: (259) [user] subst_vars(";;     let program1 = \"", _479872, [], _480812)
^  Unify: (259) [user] subst_vars(";;     let program1 = \"", _479872, [], _480812)
   Call: (260) [system] atom(";;     let program1 = \"")
^  Redo: (259) [user] subst_vars(";;     let program1 = \"", _479872, [], _480812)
^  Unify: (259) [user] subst_vars(";;     let program1 = \"", _479872, [], _480812)
   Call: (260) [system] compound(";;     let program1 = \"")
^  Redo: (259) [user] subst_vars(";;     let program1 = \"", _479872, [], _480812)
^  Unify: (259) [user] subst_vars(";;     let program1 = \"", ";;     let program1 = \"", [], [])
^  Exit: (259) [user] subst_vars(";;     let program1 = \"", ";;     let program1 = \"", [], [])
^  Call: (259) [user] subst_vars([1112, 0], _479874, [], _464936)
^  Unify: (259) [user] subst_vars([1112, 0], [1112, 0], [], [])
   Call: (260) [system] var([1112, 0])
^  Redo: (259) [user] subst_vars([1112, 0], _479874, [], _464936)
^  Unify: (259) [user] subst_vars([1112, 0], [_495744|_495746], [], _464936)
^  Call: (260) [user] subst_vars(1112, _495744, [], _496684)
^  Unify: (260) [user] subst_vars(1112, 1112, [], [])
   Call: (261) [system] var(1112)
^  Redo: (260) [user] subst_vars(1112, _495744, [], _496684)
^  Unify: (260) [user] subst_vars(1112, _495744, [], _496684)
   Call: (261) [system] atom(1112)
^  Redo: (260) [user] subst_vars(1112, _495744, [], _496684)
^  Unify: (260) [user] subst_vars(1112, _495744, [], _496684)
   Call: (261) [system] compound(1112)
^  Redo: (260) [user] subst_vars(1112, _495744, [], _496684)
^  Unify: (260) [user] subst_vars(1112, 1112, [], [])
^  Exit: (260) [user] subst_vars(1112, 1112, [], [])
^  Call: (260) [user] subst_vars([0], _495746, [], _464936)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _495746, [], _464936)
^  Unify: (260) [user] subst_vars([0], [_511616|_511618], [], _464936)
^  Call: (261) [user] subst_vars(0, _511616, [], _512556)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _511616, [], _512556)
^  Unify: (261) [user] subst_vars(0, _511616, [], _512556)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _511616, [], _512556)
^  Unify: (261) [user] subst_vars(0, _511616, [], _512556)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _511616, [], _512556)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _5990, [], _5944)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _5990, [], _5944)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1112, 0], [1112, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     let program1 = \"", 1112, 0], [";;     let program1 = \"", 1112, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5942, '$COMMENT', [";;     let program1 = \"", 1112, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT', [";;     let program1 = \"", 1112, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     let program1 = \"", 1112, 0), '$COMMENT'(";;     let program1 = \"", 1112, 0), [], [])
   Call: (257) [system] _17030=metta_file_buffer(+, '$COMMENT'(";;     let program1 = \"", 1112, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     let program1 = \"", 1112, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     let program1 = \"", 1112, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let program1 = \"", 1112, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let program1 = \"", 1112, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program1 = \"", 1112, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program1 = \"", 1112, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program1 = \"", 1112, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program1 = \"", 1112, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1113, 0, 41012, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$stream_position'(41012, 1113, 0, 41012)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _69752))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _69752))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _69752)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _69752)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _69752)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _69752)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _75364))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _75364))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _75364))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _75364))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _75364)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _75364)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _80950))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _80950))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _80950)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _80950)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _80950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _80950)
   Call: (270) [system] var('$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _80950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$VAR'(_88410))
   Call: (270) [system] atom('$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _80950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _80950)
   Call: (270) [system] '$COMMENT'(";;      (: myAtom myType)", 1113, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _80950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _80950)
   Call: (270) [system] '$COMMENT'(";;      (: myAtom myType)", 1113, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _80950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _80950)
   Call: (270) [system] '$COMMENT'(";;      (: myAtom myType)", 1113, 0)==[_97690, _97696]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _80950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _80950)
   Call: (270) [system] is_list('$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _80950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _80950)
   Call: (270) [system] string('$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _80950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _80950)
   Call: (270) [system] compound('$COMMENT'(";;      (: myAtom myType)", 1113, 0))
   Exit: (270) [system] compound('$COMMENT'(";;      (: myAtom myType)", 1113, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _107892, _107894)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT', [";;      (: myAtom myType)", 1113, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;      (: myAtom myType)", 1113, 0], _111634)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;      (: myAtom myType)", 1113, 0], _111634)
   Call: (271) [apply] apply:maplist_([";;      (: myAtom myType)", 1113, 0], _111634, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;      (: myAtom myType)", 1113, 0], [_114452|_114454], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;      (: myAtom myType)", _114452)
^  Unify: (272) [user] mfix_vars1(";;      (: myAtom myType)", _114452)
   Call: (273) [system] var(";;      (: myAtom myType)")
^  Redo: (272) [user] mfix_vars1(";;      (: myAtom myType)", _114452)
^  Unify: (272) [user] mfix_vars1(";;      (: myAtom myType)", '$VAR'(_119098))
   Call: (273) [system] atom(";;      (: myAtom myType)")
^  Redo: (272) [user] mfix_vars1(";;      (: myAtom myType)", _114452)
^  Unify: (272) [user] mfix_vars1(";;      (: myAtom myType)", _114452)
   Call: (273) [system] ";;      (: myAtom myType)"==true
^  Redo: (272) [user] mfix_vars1(";;      (: myAtom myType)", _114452)
^  Unify: (272) [user] mfix_vars1(";;      (: myAtom myType)", _114452)
   Call: (273) [system] ";;      (: myAtom myType)"==false
^  Redo: (272) [user] mfix_vars1(";;      (: myAtom myType)", _114452)
^  Unify: (272) [user] mfix_vars1(";;      (: myAtom myType)", _114452)
   Call: (273) [system] ";;      (: myAtom myType)"==[_128378, _128384]
^  Redo: (272) [user] mfix_vars1(";;      (: myAtom myType)", _114452)
^  Unify: (272) [user] mfix_vars1(";;      (: myAtom myType)", _114452)
   Call: (273) [system] is_list(";;      (: myAtom myType)")
^  Redo: (272) [user] mfix_vars1(";;      (: myAtom myType)", _114452)
^  Unify: (272) [user] mfix_vars1(";;      (: myAtom myType)", _114452)
   Call: (273) [system] string(";;      (: myAtom myType)")
   Exit: (273) [system] string(";;      (: myAtom myType)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;      (: myAtom myType)", _114452)
^  Unify: (272) [user] mfix_vars1(";;      (: myAtom myType)", _114452)
   Call: (273) [system] compound(";;      (: myAtom myType)")
^  Redo: (272) [user] mfix_vars1(";;      (: myAtom myType)", _114452)
^  Unify: (272) [user] mfix_vars1(";;      (: myAtom myType)", _114452)
^  Call: (273) [user] symbol(";;      (: myAtom myType)")
^  Unify: (273) [user] symbol(";;      (: myAtom myType)")
   Call: (274) [system] atom(";;      (: myAtom myType)")
   Fail: (274) [system] atom(";;      (: myAtom myType)")
^  Fail: (273) [user] symbol(";;      (: myAtom myType)")
^  Redo: (272) [user] mfix_vars1(";;      (: myAtom myType)", _114452)
   Call: (273) [system] ";;      (: myAtom myType)"=_114452
   Exit: (273) [system] ";;      (: myAtom myType)"=";;      (: myAtom myType)"
^  Exit: (272) [user] mfix_vars1(";;      (: myAtom myType)", ";;      (: myAtom myType)")
   Call: (272) [apply] apply:maplist_([1113, 0], _114454, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1113, 0], [_152450|_152452], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1113, _152450)
^  Unify: (273) [user] mfix_vars1(1113, _152450)
   Call: (274) [system] var(1113)
^  Redo: (273) [user] mfix_vars1(1113, _152450)
^  Unify: (273) [user] mfix_vars1(1113, '$VAR'(_157096))
   Call: (274) [system] atom(1113)
^  Redo: (273) [user] mfix_vars1(1113, _152450)
^  Unify: (273) [user] mfix_vars1(1113, _152450)
   Call: (274) [system] 1113==true
^  Redo: (273) [user] mfix_vars1(1113, _152450)
^  Unify: (273) [user] mfix_vars1(1113, _152450)
   Call: (274) [system] 1113==false
^  Redo: (273) [user] mfix_vars1(1113, _152450)
^  Unify: (273) [user] mfix_vars1(1113, _152450)
   Call: (274) [system] 1113==[_166376, _166382]
^  Redo: (273) [user] mfix_vars1(1113, _152450)
^  Unify: (273) [user] mfix_vars1(1113, _152450)
   Call: (274) [system] is_list(1113)
^  Redo: (273) [user] mfix_vars1(1113, _152450)
^  Unify: (273) [user] mfix_vars1(1113, _152450)
   Call: (274) [system] string(1113)
^  Redo: (273) [user] mfix_vars1(1113, _152450)
^  Unify: (273) [user] mfix_vars1(1113, _152450)
   Call: (274) [system] compound(1113)
^  Redo: (273) [user] mfix_vars1(1113, _152450)
^  Unify: (273) [user] mfix_vars1(1113, _152450)
^  Call: (274) [user] symbol(1113)
^  Unify: (274) [user] symbol(1113)
   Call: (275) [system] atom(1113)
   Fail: (275) [system] atom(1113)
^  Fail: (274) [user] symbol(1113)
^  Redo: (273) [user] mfix_vars1(1113, _152450)
   Call: (274) [system] 1113=_152450
   Exit: (274) [system] 1113=1113
^  Exit: (273) [user] mfix_vars1(1113, 1113)
   Call: (273) [apply] apply:maplist_([0], _152452, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_186776|_186778], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _186776)
^  Unify: (274) [user] mfix_vars1(0, _186776)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _186776)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_191422))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _186776)
^  Unify: (274) [user] mfix_vars1(0, _186776)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _186776)
^  Unify: (274) [user] mfix_vars1(0, _186776)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _186776)
^  Unify: (274) [user] mfix_vars1(0, _186776)
   Call: (275) [system] 0==[_200702, _200708]
^  Redo: (274) [user] mfix_vars1(0, _186776)
^  Unify: (274) [user] mfix_vars1(0, _186776)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _186776)
^  Unify: (274) [user] mfix_vars1(0, _186776)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _186776)
^  Unify: (274) [user] mfix_vars1(0, _186776)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _186776)
^  Unify: (274) [user] mfix_vars1(0, _186776)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _186776)
   Call: (275) [system] 0=_186776
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _186778, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1113, 0], [1113, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;      (: myAtom myType)", 1113, 0], [";;      (: myAtom myType)", 1113, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;      (: myAtom myType)", 1113, 0], [";;      (: myAtom myType)", 1113, 0])
   Call: (270) [system] compound_name_arguments(_80950, '$COMMENT', [";;      (: myAtom myType)", 1113, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT', [";;      (: myAtom myType)", 1113, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0)))
   Call: (267) [system] '$COMMENT'(";;      (: myAtom myType)", 1113, 0)\=@='$COMMENT'(";;      (: myAtom myType)", 1113, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _75364)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _236950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _236950))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _236950))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _236950))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _236950)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _236950)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _242536))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _242536))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _242536)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _242536)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _242536)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0)))
   Call: (267) [system] '$COMMENT'(";;      (: myAtom myType)", 1113, 0)\=@='$COMMENT'(";;      (: myAtom myType)", 1113, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _236950)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _69752))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _69752))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _69752))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _69752))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _69752)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _69752)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _264856))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _264856))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _264856)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _264856)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _264856)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0)))
   Call: (267) [system] '$COMMENT'(";;      (: myAtom myType)", 1113, 0)\=@='$COMMENT'(";;      (: myAtom myType)", 1113, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _69752)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0)))
   Call: (261) [system] '$COMMENT'(";;      (: myAtom myType)", 1113, 0)\=@='$COMMENT'(";;      (: myAtom myType)", 1113, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _293634, [], _293636)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _293634, [], _293636)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _293634, [], _293636)
   Call: (258) [system] atom('$COMMENT'(";;      (: myAtom myType)", 1113, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _293634, [], _293636)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _293634, [], _293636)
   Call: (258) [system] compound('$COMMENT'(";;      (: myAtom myType)", 1113, 0))
   Exit: (258) [system] compound('$COMMENT'(";;      (: myAtom myType)", 1113, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;      (: myAtom myType)", 1113, 0), _302950, _302952)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT', [";;      (: myAtom myType)", 1113, 0])
^  Call: (258) [user] subst_vars([";;      (: myAtom myType)", 1113, 0], _304836, [], _293636)
^  Unify: (258) [user] subst_vars([";;      (: myAtom myType)", 1113, 0], [";;      (: myAtom myType)", 1113, 0], [], [])
   Call: (259) [system] var([";;      (: myAtom myType)", 1113, 0])
^  Redo: (258) [user] subst_vars([";;      (: myAtom myType)", 1113, 0], _304836, [], _293636)
^  Unify: (258) [user] subst_vars([";;      (: myAtom myType)", 1113, 0], [_308572|_308574], [], _293636)
^  Call: (259) [user] subst_vars(";;      (: myAtom myType)", _308572, [], _309512)
^  Unify: (259) [user] subst_vars(";;      (: myAtom myType)", ";;      (: myAtom myType)", [], [])
   Call: (260) [system] var(";;      (: myAtom myType)")
^  Redo: (259) [user] subst_vars(";;      (: myAtom myType)", _308572, [], _309512)
^  Unify: (259) [user] subst_vars(";;      (: myAtom myType)", _308572, [], _309512)
   Call: (260) [system] atom(";;      (: myAtom myType)")
^  Redo: (259) [user] subst_vars(";;      (: myAtom myType)", _308572, [], _309512)
^  Unify: (259) [user] subst_vars(";;      (: myAtom myType)", _308572, [], _309512)
   Call: (260) [system] compound(";;      (: myAtom myType)")
^  Redo: (259) [user] subst_vars(";;      (: myAtom myType)", _308572, [], _309512)
^  Unify: (259) [user] subst_vars(";;      (: myAtom myType)", ";;      (: myAtom myType)", [], [])
^  Exit: (259) [user] subst_vars(";;      (: myAtom myType)", ";;      (: myAtom myType)", [], [])
^  Call: (259) [user] subst_vars([1113, 0], _308574, [], _293636)
^  Unify: (259) [user] subst_vars([1113, 0], [1113, 0], [], [])
   Call: (260) [system] var([1113, 0])
^  Redo: (259) [user] subst_vars([1113, 0], _308574, [], _293636)
^  Unify: (259) [user] subst_vars([1113, 0], [_324444|_324446], [], _293636)
^  Call: (260) [user] subst_vars(1113, _324444, [], _325384)
^  Unify: (260) [user] subst_vars(1113, 1113, [], [])
   Call: (261) [system] var(1113)
^  Redo: (260) [user] subst_vars(1113, _324444, [], _325384)
^  Unify: (260) [user] subst_vars(1113, _324444, [], _325384)
   Call: (261) [system] atom(1113)
^  Redo: (260) [user] subst_vars(1113, _324444, [], _325384)
^  Unify: (260) [user] subst_vars(1113, _324444, [], _325384)
   Call: (261) [system] compound(1113)
^  Redo: (260) [user] subst_vars(1113, _324444, [], _325384)
^  Unify: (260) [user] subst_vars(1113, 1113, [], [])
^  Exit: (260) [user] subst_vars(1113, 1113, [], [])
^  Call: (260) [user] subst_vars([0], _324446, [], _293636)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _324446, [], _293636)
^  Unify: (260) [user] subst_vars([0], [_340316|_340318], [], _293636)
^  Call: (261) [user] subst_vars(0, _340316, [], _341256)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _340316, [], _341256)
^  Unify: (261) [user] subst_vars(0, _340316, [], _341256)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _340316, [], _341256)
^  Unify: (261) [user] subst_vars(0, _340316, [], _341256)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _340316, [], _341256)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _340318, [], _293636)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _340318, [], _293636)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1113, 0], [1113, 0], [], [])
^  Exit: (258) [user] subst_vars([";;      (: myAtom myType)", 1113, 0], [";;      (: myAtom myType)", 1113, 0], [], [])
   Call: (258) [system] compound_name_arguments(_293634, '$COMMENT', [";;      (: myAtom myType)", 1113, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT', [";;      (: myAtom myType)", 1113, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;      (: myAtom myType)", 1113, 0), '$COMMENT'(";;      (: myAtom myType)", 1113, 0), [], [])
   Call: (257) [system] _363674=metta_file_buffer(+, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: myAtom myType)", 1113, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1114, 0, 41038, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$stream_position'(41038, 1114, 0, 41038)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _416396))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _416396))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _416396)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _416396)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _416396)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _416396)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _422008))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _422008))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _422008))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _422008))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _422008)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _422008)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _427594))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _427594))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _427594)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _427594)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _427594)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _427594)
   Call: (270) [system] var('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _427594)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$VAR'(_435054))
   Call: (270) [system] atom('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _427594)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _427594)
   Call: (270) [system] '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _427594)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _427594)
   Call: (270) [system] '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _427594)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _427594)
   Call: (270) [system] '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0)==[_444334, _444340]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _427594)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _427594)
   Call: (270) [system] is_list('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _427594)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _427594)
   Call: (270) [system] string('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _427594)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _427594)
   Call: (270) [system] compound('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
   Exit: (270) [system] compound('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _454536, _454538)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT', [";;      (: id_a (-> A A))", 1114, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;      (: id_a (-> A A))", 1114, 0], _458278)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;      (: id_a (-> A A))", 1114, 0], _458278)
   Call: (271) [apply] apply:maplist_([";;      (: id_a (-> A A))", 1114, 0], _458278, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;      (: id_a (-> A A))", 1114, 0], [_461096|_461098], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;      (: id_a (-> A A))", _461096)
^  Unify: (272) [user] mfix_vars1(";;      (: id_a (-> A A))", _461096)
   Call: (273) [system] var(";;      (: id_a (-> A A))")
^  Redo: (272) [user] mfix_vars1(";;      (: id_a (-> A A))", _461096)
^  Unify: (272) [user] mfix_vars1(";;      (: id_a (-> A A))", '$VAR'(_465742))
   Call: (273) [system] atom(";;      (: id_a (-> A A))")
^  Redo: (272) [user] mfix_vars1(";;      (: id_a (-> A A))", _461096)
^  Unify: (272) [user] mfix_vars1(";;      (: id_a (-> A A))", _461096)
   Call: (273) [system] ";;      (: id_a (-> A A))"==true
^  Redo: (272) [user] mfix_vars1(";;      (: id_a (-> A A))", _461096)
^  Unify: (272) [user] mfix_vars1(";;      (: id_a (-> A A))", _461096)
   Call: (273) [system] ";;      (: id_a (-> A A))"==false
^  Redo: (272) [user] mfix_vars1(";;      (: id_a (-> A A))", _461096)
^  Unify: (272) [user] mfix_vars1(";;      (: id_a (-> A A))", _461096)
   Call: (273) [system] ";;      (: id_a (-> A A))"==[_475022, _475028]
^  Redo: (272) [user] mfix_vars1(";;      (: id_a (-> A A))", _461096)
^  Unify: (272) [user] mfix_vars1(";;      (: id_a (-> A A))", _461096)
   Call: (273) [system] is_list(";;      (: id_a (-> A A))")
^  Redo: (272) [user] mfix_vars1(";;      (: id_a (-> A A))", _461096)
^  Unify: (272) [user] mfix_vars1(";;      (: id_a (-> A A))", _461096)
   Call: (273) [system] string(";;      (: id_a (-> A A))")
   Exit: (273) [system] string(";;      (: id_a (-> A A))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;      (: id_a (-> A A))", _461096)
^  Unify: (272) [user] mfix_vars1(";;      (: id_a (-> A A))", _461096)
   Call: (273) [system] compound(";;      (: id_a (-> A A))")
^  Redo: (272) [user] mfix_vars1(";;      (: id_a (-> A A))", _461096)
^  Unify: (272) [user] mfix_vars1(";;      (: id_a (-> A A))", _461096)
^  Call: (273) [user] symbol(";;      (: id_a (-> A A))")
^  Unify: (273) [user] symbol(";;      (: id_a (-> A A))")
   Call: (274) [system] atom(";;      (: id_a (-> A A))")
   Fail: (274) [system] atom(";;      (: id_a (-> A A))")
^  Fail: (273) [user] symbol(";;      (: id_a (-> A A))")
^  Redo: (272) [user] mfix_vars1(";;      (: id_a (-> A A))", _461096)
   Call: (273) [system] ";;      (: id_a (-> A A))"=_461096
   Exit: (273) [system] ";;      (: id_a (-> A A))"=";;      (: id_a (-> A A))"
^  Exit: (272) [user] mfix_vars1(";;      (: id_a (-> A A))", ";;      (: id_a (-> A A))")
   Call: (272) [apply] apply:maplist_([1114, 0], _461098, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1114, 0], [_499094|_499096], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1114, _499094)
^  Unify: (273) [user] mfix_vars1(1114, _499094)
   Call: (274) [system] var(1114)
^  Redo: (273) [user] mfix_vars1(1114, _499094)
^  Unify: (273) [user] mfix_vars1(1114, '$VAR'(_503740))
   Call: (274) [system] atom(1114)
^  Redo: (273) [user] mfix_vars1(1114, _499094)
^  Unify: (273) [user] mfix_vars1(1114, _499094)
   Call: (274) [system] 1114==true
^  Redo: (273) [user] mfix_vars1(1114, _499094)
^  Unify: (273) [user] mfix_vars1(1114, _499094)
   Call: (274) [system] 1114==false
^  Redo: (273) [user] mfix_vars1(1114, _499094)
^  Unify: (273) [user] mfix_vars1(1114, _499094)
   Call: (274) [system] 1114==[_513020, _513026]
^  Redo: (273) [user] mfix_vars1(1114, _499094)
^  Unify: (273) [user] mfix_vars1(1114, _499094)
   Call: (274) [system] is_list(1114)
^  Redo: (273) [user] mfix_vars1(1114, _499094)
^  Unify: (273) [user] mfix_vars1(1114, _499094)
   Call: (274) [system] string(1114)
^  Redo: (273) [user] mfix_vars1(1114, _499094)
^  Unify: (273) [user] mfix_vars1(1114, _499094)
   Call: (274) [system] compound(1114)
^  Redo: (273) [user] mfix_vars1(1114, _499094)
^  Unify: (273) [user] mfix_vars1(1114, _499094)
^  Call: (274) [user] symbol(1114)
^  Unify: (274) [user] symbol(1114)
   Call: (275) [system] atom(1114)
   Fail: (275) [system] atom(1114)
^  Fail: (274) [user] symbol(1114)
^  Redo: (273) [user] mfix_vars1(1114, _6034)
   Call: (274) [system] 1114=_6034
   Exit: (274) [system] 1114=1114
^  Exit: (273) [user] mfix_vars1(1114, 1114)
   Call: (273) [apply] apply:maplist_([0], _6036, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_15278|_15280], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _15278)
^  Unify: (274) [user] mfix_vars1(0, _15278)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _15278)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_19924))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _15278)
^  Unify: (274) [user] mfix_vars1(0, _15278)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _15278)
^  Unify: (274) [user] mfix_vars1(0, _15278)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _15278)
^  Unify: (274) [user] mfix_vars1(0, _15278)
   Call: (275) [system] 0==[_29204, _29210]
^  Redo: (274) [user] mfix_vars1(0, _15278)
^  Unify: (274) [user] mfix_vars1(0, _15278)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _15278)
^  Unify: (274) [user] mfix_vars1(0, _15278)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _15278)
^  Unify: (274) [user] mfix_vars1(0, _15278)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _15278)
^  Unify: (274) [user] mfix_vars1(0, _15278)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _15278)
   Call: (275) [system] 0=_15278
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _15280, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1114, 0], [1114, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;      (: id_a (-> A A))", 1114, 0], [";;      (: id_a (-> A A))", 1114, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;      (: id_a (-> A A))", 1114, 0], [";;      (: id_a (-> A A))", 1114, 0])
   Call: (270) [system] compound_name_arguments(_5982, '$COMMENT', [";;      (: id_a (-> A A))", 1114, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT', [";;      (: id_a (-> A A))", 1114, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0)))
   Call: (267) [system] '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0)\=@='$COMMENT'(";;      (: id_a (-> A A))", 1114, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _5968)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _65452))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _65452))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _65452))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _65452))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _65452)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _65452)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _71038))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _71038))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _71038)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _71038)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _71038)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0)))
   Call: (267) [system] '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0)\=@='$COMMENT'(";;      (: id_a (-> A A))", 1114, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _65452)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _5948))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _5948))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _5948))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _5948))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _5948)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _93358))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _93358))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _93358)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _93358)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _93358)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0)))
   Call: (267) [system] '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0)\=@='$COMMENT'(";;      (: id_a (-> A A))", 1114, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0)))
   Call: (261) [system] '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0)\=@='$COMMENT'(";;      (: id_a (-> A A))", 1114, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _122136, [], _122138)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _122136, [], _122138)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _122136, [], _122138)
   Call: (258) [system] atom('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _122136, [], _122138)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _122136, [], _122138)
   Call: (258) [system] compound('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
   Exit: (258) [system] compound('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), _131452, _131454)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT', [";;      (: id_a (-> A A))", 1114, 0])
^  Call: (258) [user] subst_vars([";;      (: id_a (-> A A))", 1114, 0], _133338, [], _122138)
^  Unify: (258) [user] subst_vars([";;      (: id_a (-> A A))", 1114, 0], [";;      (: id_a (-> A A))", 1114, 0], [], [])
   Call: (259) [system] var([";;      (: id_a (-> A A))", 1114, 0])
^  Redo: (258) [user] subst_vars([";;      (: id_a (-> A A))", 1114, 0], _133338, [], _122138)
^  Unify: (258) [user] subst_vars([";;      (: id_a (-> A A))", 1114, 0], [_137074|_137076], [], _122138)
^  Call: (259) [user] subst_vars(";;      (: id_a (-> A A))", _137074, [], _138014)
^  Unify: (259) [user] subst_vars(";;      (: id_a (-> A A))", ";;      (: id_a (-> A A))", [], [])
   Call: (260) [system] var(";;      (: id_a (-> A A))")
^  Redo: (259) [user] subst_vars(";;      (: id_a (-> A A))", _137074, [], _138014)
^  Unify: (259) [user] subst_vars(";;      (: id_a (-> A A))", _137074, [], _138014)
   Call: (260) [system] atom(";;      (: id_a (-> A A))")
^  Redo: (259) [user] subst_vars(";;      (: id_a (-> A A))", _137074, [], _138014)
^  Unify: (259) [user] subst_vars(";;      (: id_a (-> A A))", _137074, [], _138014)
   Call: (260) [system] compound(";;      (: id_a (-> A A))")
^  Redo: (259) [user] subst_vars(";;      (: id_a (-> A A))", _137074, [], _138014)
^  Unify: (259) [user] subst_vars(";;      (: id_a (-> A A))", ";;      (: id_a (-> A A))", [], [])
^  Exit: (259) [user] subst_vars(";;      (: id_a (-> A A))", ";;      (: id_a (-> A A))", [], [])
^  Call: (259) [user] subst_vars([1114, 0], _137076, [], _122138)
^  Unify: (259) [user] subst_vars([1114, 0], [1114, 0], [], [])
   Call: (260) [system] var([1114, 0])
^  Redo: (259) [user] subst_vars([1114, 0], _137076, [], _122138)
^  Unify: (259) [user] subst_vars([1114, 0], [_152946|_152948], [], _122138)
^  Call: (260) [user] subst_vars(1114, _152946, [], _153886)
^  Unify: (260) [user] subst_vars(1114, 1114, [], [])
   Call: (261) [system] var(1114)
^  Redo: (260) [user] subst_vars(1114, _152946, [], _153886)
^  Unify: (260) [user] subst_vars(1114, _152946, [], _153886)
   Call: (261) [system] atom(1114)
^  Redo: (260) [user] subst_vars(1114, _152946, [], _153886)
^  Unify: (260) [user] subst_vars(1114, _152946, [], _153886)
   Call: (261) [system] compound(1114)
^  Redo: (260) [user] subst_vars(1114, _152946, [], _153886)
^  Unify: (260) [user] subst_vars(1114, 1114, [], [])
^  Exit: (260) [user] subst_vars(1114, 1114, [], [])
^  Call: (260) [user] subst_vars([0], _152948, [], _122138)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _152948, [], _122138)
^  Unify: (260) [user] subst_vars([0], [_168818|_168820], [], _122138)
^  Call: (261) [user] subst_vars(0, _168818, [], _169758)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _168818, [], _169758)
^  Unify: (261) [user] subst_vars(0, _168818, [], _169758)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _168818, [], _169758)
^  Unify: (261) [user] subst_vars(0, _168818, [], _169758)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _168818, [], _169758)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _168820, [], _122138)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _168820, [], _122138)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1114, 0], [1114, 0], [], [])
^  Exit: (258) [user] subst_vars([";;      (: id_a (-> A A))", 1114, 0], [";;      (: id_a (-> A A))", 1114, 0], [], [])
   Call: (258) [system] compound_name_arguments(_122136, '$COMMENT', [";;      (: id_a (-> A A))", 1114, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT', [";;      (: id_a (-> A A))", 1114, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), [], [])
   Call: (257) [system] _192176=metta_file_buffer(+, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: id_a (-> A A))", 1114, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1115, 0, 41064, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$stream_position'(41064, 1115, 0, 41064)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _244898))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _244898))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _244898)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _244898)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _244898)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _244898)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _250510))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _250510))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _250510))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _250510))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _250510)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _250510)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _256096))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _256096))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _256096)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _256096)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _256096)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _256096)
   Call: (270) [system] var('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _256096)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$VAR'(_263556))
   Call: (270) [system] atom('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _256096)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _256096)
   Call: (270) [system] '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _256096)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _256096)
   Call: (270) [system] '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _256096)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _256096)
   Call: (270) [system] '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0)==[_272836, _272842]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _256096)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _256096)
   Call: (270) [system] is_list('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _256096)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _256096)
   Call: (270) [system] string('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _256096)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _256096)
   Call: (270) [system] compound('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
   Exit: (270) [system] compound('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _283038, _283040)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT', [";;      (= (id_a $a) $a)", 1115, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;      (= (id_a $a) $a)", 1115, 0], _286780)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;      (= (id_a $a) $a)", 1115, 0], _286780)
   Call: (271) [apply] apply:maplist_([";;      (= (id_a $a) $a)", 1115, 0], _286780, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;      (= (id_a $a) $a)", 1115, 0], [_289598|_289600], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;      (= (id_a $a) $a)", _289598)
^  Unify: (272) [user] mfix_vars1(";;      (= (id_a $a) $a)", _289598)
   Call: (273) [system] var(";;      (= (id_a $a) $a)")
^  Redo: (272) [user] mfix_vars1(";;      (= (id_a $a) $a)", _289598)
^  Unify: (272) [user] mfix_vars1(";;      (= (id_a $a) $a)", '$VAR'(_294244))
   Call: (273) [system] atom(";;      (= (id_a $a) $a)")
^  Redo: (272) [user] mfix_vars1(";;      (= (id_a $a) $a)", _289598)
^  Unify: (272) [user] mfix_vars1(";;      (= (id_a $a) $a)", _289598)
   Call: (273) [system] ";;      (= (id_a $a) $a)"==true
^  Redo: (272) [user] mfix_vars1(";;      (= (id_a $a) $a)", _289598)
^  Unify: (272) [user] mfix_vars1(";;      (= (id_a $a) $a)", _289598)
   Call: (273) [system] ";;      (= (id_a $a) $a)"==false
^  Redo: (272) [user] mfix_vars1(";;      (= (id_a $a) $a)", _289598)
^  Unify: (272) [user] mfix_vars1(";;      (= (id_a $a) $a)", _289598)
   Call: (273) [system] ";;      (= (id_a $a) $a)"==[_303524, _303530]
^  Redo: (272) [user] mfix_vars1(";;      (= (id_a $a) $a)", _289598)
^  Unify: (272) [user] mfix_vars1(";;      (= (id_a $a) $a)", _289598)
   Call: (273) [system] is_list(";;      (= (id_a $a) $a)")
^  Redo: (272) [user] mfix_vars1(";;      (= (id_a $a) $a)", _289598)
^  Unify: (272) [user] mfix_vars1(";;      (= (id_a $a) $a)", _289598)
   Call: (273) [system] string(";;      (= (id_a $a) $a)")
   Exit: (273) [system] string(";;      (= (id_a $a) $a)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;      (= (id_a $a) $a)", _289598)
^  Unify: (272) [user] mfix_vars1(";;      (= (id_a $a) $a)", _289598)
   Call: (273) [system] compound(";;      (= (id_a $a) $a)")
^  Redo: (272) [user] mfix_vars1(";;      (= (id_a $a) $a)", _289598)
^  Unify: (272) [user] mfix_vars1(";;      (= (id_a $a) $a)", _289598)
^  Call: (273) [user] symbol(";;      (= (id_a $a) $a)")
^  Unify: (273) [user] symbol(";;      (= (id_a $a) $a)")
   Call: (274) [system] atom(";;      (= (id_a $a) $a)")
   Fail: (274) [system] atom(";;      (= (id_a $a) $a)")
^  Fail: (273) [user] symbol(";;      (= (id_a $a) $a)")
^  Redo: (272) [user] mfix_vars1(";;      (= (id_a $a) $a)", _289598)
   Call: (273) [system] ";;      (= (id_a $a) $a)"=_289598
   Exit: (273) [system] ";;      (= (id_a $a) $a)"=";;      (= (id_a $a) $a)"
^  Exit: (272) [user] mfix_vars1(";;      (= (id_a $a) $a)", ";;      (= (id_a $a) $a)")
   Call: (272) [apply] apply:maplist_([1115, 0], _289600, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1115, 0], [_327596|_327598], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1115, _327596)
^  Unify: (273) [user] mfix_vars1(1115, _327596)
   Call: (274) [system] var(1115)
^  Redo: (273) [user] mfix_vars1(1115, _327596)
^  Unify: (273) [user] mfix_vars1(1115, '$VAR'(_332242))
   Call: (274) [system] atom(1115)
^  Redo: (273) [user] mfix_vars1(1115, _327596)
^  Unify: (273) [user] mfix_vars1(1115, _327596)
   Call: (274) [system] 1115==true
^  Redo: (273) [user] mfix_vars1(1115, _327596)
^  Unify: (273) [user] mfix_vars1(1115, _327596)
   Call: (274) [system] 1115==false
^  Redo: (273) [user] mfix_vars1(1115, _327596)
^  Unify: (273) [user] mfix_vars1(1115, _327596)
   Call: (274) [system] 1115==[_341522, _341528]
^  Redo: (273) [user] mfix_vars1(1115, _327596)
^  Unify: (273) [user] mfix_vars1(1115, _327596)
   Call: (274) [system] is_list(1115)
^  Redo: (273) [user] mfix_vars1(1115, _327596)
^  Unify: (273) [user] mfix_vars1(1115, _327596)
   Call: (274) [system] string(1115)
^  Redo: (273) [user] mfix_vars1(1115, _327596)
^  Unify: (273) [user] mfix_vars1(1115, _327596)
   Call: (274) [system] compound(1115)
^  Redo: (273) [user] mfix_vars1(1115, _327596)
^  Unify: (273) [user] mfix_vars1(1115, _327596)
^  Call: (274) [user] symbol(1115)
^  Unify: (274) [user] symbol(1115)
   Call: (275) [system] atom(1115)
   Fail: (275) [system] atom(1115)
^  Fail: (274) [user] symbol(1115)
^  Redo: (273) [user] mfix_vars1(1115, _327596)
   Call: (274) [system] 1115=_327596
   Exit: (274) [system] 1115=1115
^  Exit: (273) [user] mfix_vars1(1115, 1115)
   Call: (273) [apply] apply:maplist_([0], _327598, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_361922|_361924], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _361922)
^  Unify: (274) [user] mfix_vars1(0, _361922)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _361922)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_366568))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _361922)
^  Unify: (274) [user] mfix_vars1(0, _361922)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _361922)
^  Unify: (274) [user] mfix_vars1(0, _361922)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _361922)
^  Unify: (274) [user] mfix_vars1(0, _361922)
   Call: (275) [system] 0==[_375848, _375854]
^  Redo: (274) [user] mfix_vars1(0, _361922)
^  Unify: (274) [user] mfix_vars1(0, _361922)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _361922)
^  Unify: (274) [user] mfix_vars1(0, _361922)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _361922)
^  Unify: (274) [user] mfix_vars1(0, _361922)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _361922)
^  Unify: (274) [user] mfix_vars1(0, _361922)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _361922)
   Call: (275) [system] 0=_361922
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _361924, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1115, 0], [1115, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;      (= (id_a $a) $a)", 1115, 0], [";;      (= (id_a $a) $a)", 1115, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;      (= (id_a $a) $a)", 1115, 0], [";;      (= (id_a $a) $a)", 1115, 0])
   Call: (270) [system] compound_name_arguments(_256096, '$COMMENT', [";;      (= (id_a $a) $a)", 1115, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT', [";;      (= (id_a $a) $a)", 1115, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0)))
   Call: (267) [system] '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0)\=@='$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _250510)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _412096))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _412096))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _412096))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _412096))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _412096)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _412096)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _417682))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _417682))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _417682)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _417682)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _417682)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0)))
   Call: (267) [system] '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0)\=@='$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _412096)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _244898))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _244898))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _244898))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _244898))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _244898)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _244898)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _440002))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _440002))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _440002)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _440002)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _440002)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0)))
   Call: (267) [system] '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0)\=@='$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _244898)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0)))
   Call: (261) [system] '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0)\=@='$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _468780, [], _468782)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _468780, [], _468782)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _468780, [], _468782)
   Call: (258) [system] atom('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _468780, [], _468782)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _468780, [], _468782)
   Call: (258) [system] compound('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
   Exit: (258) [system] compound('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), _478096, _478098)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT', [";;      (= (id_a $a) $a)", 1115, 0])
^  Call: (258) [user] subst_vars([";;      (= (id_a $a) $a)", 1115, 0], _479982, [], _468782)
^  Unify: (258) [user] subst_vars([";;      (= (id_a $a) $a)", 1115, 0], [";;      (= (id_a $a) $a)", 1115, 0], [], [])
   Call: (259) [system] var([";;      (= (id_a $a) $a)", 1115, 0])
^  Redo: (258) [user] subst_vars([";;      (= (id_a $a) $a)", 1115, 0], _479982, [], _468782)
^  Unify: (258) [user] subst_vars([";;      (= (id_a $a) $a)", 1115, 0], [_483718|_483720], [], _468782)
^  Call: (259) [user] subst_vars(";;      (= (id_a $a) $a)", _483718, [], _484658)
^  Unify: (259) [user] subst_vars(";;      (= (id_a $a) $a)", ";;      (= (id_a $a) $a)", [], [])
   Call: (260) [system] var(";;      (= (id_a $a) $a)")
^  Redo: (259) [user] subst_vars(";;      (= (id_a $a) $a)", _483718, [], _484658)
^  Unify: (259) [user] subst_vars(";;      (= (id_a $a) $a)", _483718, [], _484658)
   Call: (260) [system] atom(";;      (= (id_a $a) $a)")
^  Redo: (259) [user] subst_vars(";;      (= (id_a $a) $a)", _483718, [], _484658)
^  Unify: (259) [user] subst_vars(";;      (= (id_a $a) $a)", _483718, [], _484658)
   Call: (260) [system] compound(";;      (= (id_a $a) $a)")
^  Redo: (259) [user] subst_vars(";;      (= (id_a $a) $a)", _483718, [], _484658)
^  Unify: (259) [user] subst_vars(";;      (= (id_a $a) $a)", ";;      (= (id_a $a) $a)", [], [])
^  Exit: (259) [user] subst_vars(";;      (= (id_a $a) $a)", ";;      (= (id_a $a) $a)", [], [])
^  Call: (259) [user] subst_vars([1115, 0], _483720, [], _468782)
^  Unify: (259) [user] subst_vars([1115, 0], [1115, 0], [], [])
   Call: (260) [system] var([1115, 0])
^  Redo: (259) [user] subst_vars([1115, 0], _483720, [], _468782)
^  Unify: (259) [user] subst_vars([1115, 0], [_499590|_499592], [], _468782)
^  Call: (260) [user] subst_vars(1115, _499590, [], _500530)
^  Unify: (260) [user] subst_vars(1115, 1115, [], [])
   Call: (261) [system] var(1115)
^  Redo: (260) [user] subst_vars(1115, _499590, [], _500530)
^  Unify: (260) [user] subst_vars(1115, _499590, [], _500530)
   Call: (261) [system] atom(1115)
^  Redo: (260) [user] subst_vars(1115, _499590, [], _500530)
^  Unify: (260) [user] subst_vars(1115, _499590, [], _500530)
   Call: (261) [system] compound(1115)
^  Redo: (260) [user] subst_vars(1115, _499590, [], _500530)
^  Unify: (260) [user] subst_vars(1115, 1115, [], [])
^  Exit: (260) [user] subst_vars(1115, 1115, [], [])
^  Call: (260) [user] subst_vars([0], _499592, [], _468782)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _499592, [], _468782)
^  Unify: (260) [user] subst_vars([0], [_515462|_515464], [], _468782)
^  Call: (261) [user] subst_vars(0, _515462, [], _516402)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _515462, [], _516402)
^  Unify: (261) [user] subst_vars(0, _515462, [], _516402)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _515462, [], _516402)
^  Unify: (261) [user] subst_vars(0, _515462, [], _516402)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _5988, [], _5992)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _5990, [], _5944)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _5990, [], _5944)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1115, 0], [1115, 0], [], [])
^  Exit: (258) [user] subst_vars([";;      (= (id_a $a) $a)", 1115, 0], [";;      (= (id_a $a) $a)", 1115, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5942, '$COMMENT', [";;      (= (id_a $a) $a)", 1115, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT', [";;      (= (id_a $a) $a)", 1115, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), [], [])
   Call: (257) [system] _20806=metta_file_buffer(+, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (= (id_a $a) $a)", 1115, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1116, 0, 41089, '$COMMENT'(";;      ", 1116, 0), '$stream_position'(41089, 1116, 0, 41089)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      ", 1116, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      ", 1116, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;      ", 1116, 0), _73524))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      ", 1116, 0), _73524))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;      ", 1116, 0), _73524)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      ", 1116, 0), _73524)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;      ", 1116, 0), _73524)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;      ", 1116, 0), _73524)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;      ", 1116, 0), _79136))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      ", 1116, 0), _79136))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;      ", 1116, 0), _79136))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      ", 1116, 0), _79136))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      ", 1116, 0), _79136)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      ", 1116, 0), _79136)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;      ", 1116, 0), _84722))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      ", 1116, 0), _84722))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;      ", 1116, 0), _84722)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      ", 1116, 0), _84722)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1116, 0), _84722)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1116, 0), _84722)
   Call: (270) [system] var('$COMMENT'(";;      ", 1116, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1116, 0), _84722)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1116, 0), '$VAR'(_92182))
   Call: (270) [system] atom('$COMMENT'(";;      ", 1116, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1116, 0), _84722)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1116, 0), _84722)
   Call: (270) [system] '$COMMENT'(";;      ", 1116, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1116, 0), _84722)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1116, 0), _84722)
   Call: (270) [system] '$COMMENT'(";;      ", 1116, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1116, 0), _84722)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1116, 0), _84722)
   Call: (270) [system] '$COMMENT'(";;      ", 1116, 0)==[_101462, _101468]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1116, 0), _84722)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1116, 0), _84722)
   Call: (270) [system] is_list('$COMMENT'(";;      ", 1116, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1116, 0), _84722)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1116, 0), _84722)
   Call: (270) [system] string('$COMMENT'(";;      ", 1116, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1116, 0), _84722)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1116, 0), _84722)
   Call: (270) [system] compound('$COMMENT'(";;      ", 1116, 0))
   Exit: (270) [system] compound('$COMMENT'(";;      ", 1116, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;      ", 1116, 0), _111664, _111666)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      ", 1116, 0), '$COMMENT', [";;      ", 1116, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;      ", 1116, 0], _115406)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;      ", 1116, 0], _115406)
   Call: (271) [apply] apply:maplist_([";;      ", 1116, 0], _115406, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;      ", 1116, 0], [_118224|_118226], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;      ", _118224)
^  Unify: (272) [user] mfix_vars1(";;      ", _118224)
   Call: (273) [system] var(";;      ")
^  Redo: (272) [user] mfix_vars1(";;      ", _118224)
^  Unify: (272) [user] mfix_vars1(";;      ", '$VAR'(_122870))
   Call: (273) [system] atom(";;      ")
^  Redo: (272) [user] mfix_vars1(";;      ", _118224)
^  Unify: (272) [user] mfix_vars1(";;      ", _118224)
   Call: (273) [system] ";;      "==true
^  Redo: (272) [user] mfix_vars1(";;      ", _118224)
^  Unify: (272) [user] mfix_vars1(";;      ", _118224)
   Call: (273) [system] ";;      "==false
^  Redo: (272) [user] mfix_vars1(";;      ", _118224)
^  Unify: (272) [user] mfix_vars1(";;      ", _118224)
   Call: (273) [system] ";;      "==[_132150, _132156]
^  Redo: (272) [user] mfix_vars1(";;      ", _118224)
^  Unify: (272) [user] mfix_vars1(";;      ", _118224)
   Call: (273) [system] is_list(";;      ")
^  Redo: (272) [user] mfix_vars1(";;      ", _118224)
^  Unify: (272) [user] mfix_vars1(";;      ", _118224)
   Call: (273) [system] string(";;      ")
   Exit: (273) [system] string(";;      ")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;      ", _118224)
^  Unify: (272) [user] mfix_vars1(";;      ", _118224)
   Call: (273) [system] compound(";;      ")
^  Redo: (272) [user] mfix_vars1(";;      ", _118224)
^  Unify: (272) [user] mfix_vars1(";;      ", _118224)
^  Call: (273) [user] symbol(";;      ")
^  Unify: (273) [user] symbol(";;      ")
   Call: (274) [system] atom(";;      ")
   Fail: (274) [system] atom(";;      ")
^  Fail: (273) [user] symbol(";;      ")
^  Redo: (272) [user] mfix_vars1(";;      ", _118224)
   Call: (273) [system] ";;      "=_118224
   Exit: (273) [system] ";;      "=";;      "
^  Exit: (272) [user] mfix_vars1(";;      ", ";;      ")
   Call: (272) [apply] apply:maplist_([1116, 0], _118226, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1116, 0], [_156222|_156224], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1116, _156222)
^  Unify: (273) [user] mfix_vars1(1116, _156222)
   Call: (274) [system] var(1116)
^  Redo: (273) [user] mfix_vars1(1116, _156222)
^  Unify: (273) [user] mfix_vars1(1116, '$VAR'(_160868))
   Call: (274) [system] atom(1116)
^  Redo: (273) [user] mfix_vars1(1116, _156222)
^  Unify: (273) [user] mfix_vars1(1116, _156222)
   Call: (274) [system] 1116==true
^  Redo: (273) [user] mfix_vars1(1116, _156222)
^  Unify: (273) [user] mfix_vars1(1116, _156222)
   Call: (274) [system] 1116==false
^  Redo: (273) [user] mfix_vars1(1116, _156222)
^  Unify: (273) [user] mfix_vars1(1116, _156222)
   Call: (274) [system] 1116==[_170148, _170154]
^  Redo: (273) [user] mfix_vars1(1116, _156222)
^  Unify: (273) [user] mfix_vars1(1116, _156222)
   Call: (274) [system] is_list(1116)
^  Redo: (273) [user] mfix_vars1(1116, _156222)
^  Unify: (273) [user] mfix_vars1(1116, _156222)
   Call: (274) [system] string(1116)
^  Redo: (273) [user] mfix_vars1(1116, _156222)
^  Unify: (273) [user] mfix_vars1(1116, _156222)
   Call: (274) [system] compound(1116)
^  Redo: (273) [user] mfix_vars1(1116, _156222)
^  Unify: (273) [user] mfix_vars1(1116, _156222)
^  Call: (274) [user] symbol(1116)
^  Unify: (274) [user] symbol(1116)
   Call: (275) [system] atom(1116)
   Fail: (275) [system] atom(1116)
^  Fail: (274) [user] symbol(1116)
^  Redo: (273) [user] mfix_vars1(1116, _156222)
   Call: (274) [system] 1116=_156222
   Exit: (274) [system] 1116=1116
^  Exit: (273) [user] mfix_vars1(1116, 1116)
   Call: (273) [apply] apply:maplist_([0], _156224, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_190548|_190550], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _190548)
^  Unify: (274) [user] mfix_vars1(0, _190548)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _190548)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_195194))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _190548)
^  Unify: (274) [user] mfix_vars1(0, _190548)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _190548)
^  Unify: (274) [user] mfix_vars1(0, _190548)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _190548)
^  Unify: (274) [user] mfix_vars1(0, _190548)
   Call: (275) [system] 0==[_204474, _204480]
^  Redo: (274) [user] mfix_vars1(0, _190548)
^  Unify: (274) [user] mfix_vars1(0, _190548)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _190548)
^  Unify: (274) [user] mfix_vars1(0, _190548)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _190548)
^  Unify: (274) [user] mfix_vars1(0, _190548)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _190548)
^  Unify: (274) [user] mfix_vars1(0, _190548)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _190548)
   Call: (275) [system] 0=_190548
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _190550, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1116, 0], [1116, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;      ", 1116, 0], [";;      ", 1116, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;      ", 1116, 0], [";;      ", 1116, 0])
   Call: (270) [system] compound_name_arguments(_84722, '$COMMENT', [";;      ", 1116, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      ", 1116, 0), '$COMMENT', [";;      ", 1116, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0)))
   Call: (267) [system] '$COMMENT'(";;      ", 1116, 0)\=@='$COMMENT'(";;      ", 1116, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      ", 1116, 0), _79136)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;      ", 1116, 0), _240722))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      ", 1116, 0), _240722))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;      ", 1116, 0), _240722))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      ", 1116, 0), _240722))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;      ", 1116, 0), _240722)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      ", 1116, 0), _240722)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;      ", 1116, 0), _246308))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      ", 1116, 0), _246308))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;      ", 1116, 0), _246308)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      ", 1116, 0), _246308)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;      ", 1116, 0), _246308)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0)))
   Call: (267) [system] '$COMMENT'(";;      ", 1116, 0)\=@='$COMMENT'(";;      ", 1116, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;      ", 1116, 0), _240722)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;      ", 1116, 0), _73524))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      ", 1116, 0), _73524))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;      ", 1116, 0), _73524))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      ", 1116, 0), _73524))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;      ", 1116, 0), _73524)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      ", 1116, 0), _73524)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;      ", 1116, 0), _268628))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      ", 1116, 0), _268628))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;      ", 1116, 0), _268628)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      ", 1116, 0), _268628)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;      ", 1116, 0), _268628)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0)))
   Call: (267) [system] '$COMMENT'(";;      ", 1116, 0)\=@='$COMMENT'(";;      ", 1116, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;      ", 1116, 0), _73524)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0)))
   Call: (261) [system] '$COMMENT'(";;      ", 1116, 0)\=@='$COMMENT'(";;      ", 1116, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      ", 1116, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      ", 1116, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      ", 1116, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      ", 1116, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      ", 1116, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;      ", 1116, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;      ", 1116, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;      ", 1116, 0), _297406, [], _297408)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;      ", 1116, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      ", 1116, 0), _297406, [], _297408)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      ", 1116, 0), _297406, [], _297408)
   Call: (258) [system] atom('$COMMENT'(";;      ", 1116, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      ", 1116, 0), _297406, [], _297408)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      ", 1116, 0), _297406, [], _297408)
   Call: (258) [system] compound('$COMMENT'(";;      ", 1116, 0))
   Exit: (258) [system] compound('$COMMENT'(";;      ", 1116, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;      ", 1116, 0), _306722, _306724)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      ", 1116, 0), '$COMMENT', [";;      ", 1116, 0])
^  Call: (258) [user] subst_vars([";;      ", 1116, 0], _308608, [], _297408)
^  Unify: (258) [user] subst_vars([";;      ", 1116, 0], [";;      ", 1116, 0], [], [])
   Call: (259) [system] var([";;      ", 1116, 0])
^  Redo: (258) [user] subst_vars([";;      ", 1116, 0], _308608, [], _297408)
^  Unify: (258) [user] subst_vars([";;      ", 1116, 0], [_312344|_312346], [], _297408)
^  Call: (259) [user] subst_vars(";;      ", _312344, [], _313284)
^  Unify: (259) [user] subst_vars(";;      ", ";;      ", [], [])
   Call: (260) [system] var(";;      ")
^  Redo: (259) [user] subst_vars(";;      ", _312344, [], _313284)
^  Unify: (259) [user] subst_vars(";;      ", _312344, [], _313284)
   Call: (260) [system] atom(";;      ")
^  Redo: (259) [user] subst_vars(";;      ", _312344, [], _313284)
^  Unify: (259) [user] subst_vars(";;      ", _312344, [], _313284)
   Call: (260) [system] compound(";;      ")
^  Redo: (259) [user] subst_vars(";;      ", _312344, [], _313284)
^  Unify: (259) [user] subst_vars(";;      ", ";;      ", [], [])
^  Exit: (259) [user] subst_vars(";;      ", ";;      ", [], [])
^  Call: (259) [user] subst_vars([1116, 0], _312346, [], _297408)
^  Unify: (259) [user] subst_vars([1116, 0], [1116, 0], [], [])
   Call: (260) [system] var([1116, 0])
^  Redo: (259) [user] subst_vars([1116, 0], _312346, [], _297408)
^  Unify: (259) [user] subst_vars([1116, 0], [_328216|_328218], [], _297408)
^  Call: (260) [user] subst_vars(1116, _328216, [], _329156)
^  Unify: (260) [user] subst_vars(1116, 1116, [], [])
   Call: (261) [system] var(1116)
^  Redo: (260) [user] subst_vars(1116, _328216, [], _329156)
^  Unify: (260) [user] subst_vars(1116, _328216, [], _329156)
   Call: (261) [system] atom(1116)
^  Redo: (260) [user] subst_vars(1116, _328216, [], _329156)
^  Unify: (260) [user] subst_vars(1116, _328216, [], _329156)
   Call: (261) [system] compound(1116)
^  Redo: (260) [user] subst_vars(1116, _328216, [], _329156)
^  Unify: (260) [user] subst_vars(1116, 1116, [], [])
^  Exit: (260) [user] subst_vars(1116, 1116, [], [])
^  Call: (260) [user] subst_vars([0], _328218, [], _297408)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _328218, [], _297408)
^  Unify: (260) [user] subst_vars([0], [_344088|_344090], [], _297408)
^  Call: (261) [user] subst_vars(0, _344088, [], _345028)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _344088, [], _345028)
^  Unify: (261) [user] subst_vars(0, _344088, [], _345028)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _344088, [], _345028)
^  Unify: (261) [user] subst_vars(0, _344088, [], _345028)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _344088, [], _345028)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _344090, [], _297408)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _344090, [], _297408)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1116, 0], [1116, 0], [], [])
^  Exit: (258) [user] subst_vars([";;      ", 1116, 0], [";;      ", 1116, 0], [], [])
   Call: (258) [system] compound_name_arguments(_297406, '$COMMENT', [";;      ", 1116, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      ", 1116, 0), '$COMMENT', [";;      ", 1116, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;      ", 1116, 0), '$COMMENT'(";;      ", 1116, 0), [], [])
   Call: (257) [system] _367446=metta_file_buffer(+, '$COMMENT'(";;      ", 1116, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;      ", 1116, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;      ", 1116, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      ", 1116, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      ", 1116, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      ", 1116, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      ", 1116, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      ", 1116, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      ", 1116, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1117, 0, 41098, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$stream_position'(41098, 1117, 0, 41098)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _420174))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _420174))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _420174)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _420174)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _420174)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _420174)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _425786))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _425786))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _425786))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _425786))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _425786)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _425786)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _431372))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _431372))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _431372)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _431372)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _431372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _431372)
   Call: (270) [system] var('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _431372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$VAR'(_438832))
   Call: (270) [system] atom('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _431372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _431372)
   Call: (270) [system] '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _431372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _431372)
   Call: (270) [system] '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _431372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _431372)
   Call: (270) [system] '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0)==[_448112, _448118]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _431372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _431372)
   Call: (270) [system] is_list('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _431372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _431372)
   Call: (270) [system] string('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _431372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _431372)
   Call: (270) [system] compound('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
   Exit: (270) [system] compound('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _458314, _458316)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT', [";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0], _462056)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0], _462056)
   Call: (271) [apply] apply:maplist_([";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0], _462056, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0], [_464874|_464876], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;      !(metta (id_a myAtom) %Undefined% &self)", _464874)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (id_a myAtom) %Undefined% &self)", _464874)
   Call: (273) [system] var(";;      !(metta (id_a myAtom) %Undefined% &self)")
^  Redo: (272) [user] mfix_vars1(";;      !(metta (id_a myAtom) %Undefined% &self)", _464874)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (id_a myAtom) %Undefined% &self)", '$VAR'(_469520))
   Call: (273) [system] atom(";;      !(metta (id_a myAtom) %Undefined% &self)")
^  Redo: (272) [user] mfix_vars1(";;      !(metta (id_a myAtom) %Undefined% &self)", _464874)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (id_a myAtom) %Undefined% &self)", _464874)
   Call: (273) [system] ";;      !(metta (id_a myAtom) %Undefined% &self)"==true
^  Redo: (272) [user] mfix_vars1(";;      !(metta (id_a myAtom) %Undefined% &self)", _464874)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (id_a myAtom) %Undefined% &self)", _464874)
   Call: (273) [system] ";;      !(metta (id_a myAtom) %Undefined% &self)"==false
^  Redo: (272) [user] mfix_vars1(";;      !(metta (id_a myAtom) %Undefined% &self)", _464874)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (id_a myAtom) %Undefined% &self)", _464874)
   Call: (273) [system] ";;      !(metta (id_a myAtom) %Undefined% &self)"==[_478800, _478806]
^  Redo: (272) [user] mfix_vars1(";;      !(metta (id_a myAtom) %Undefined% &self)", _464874)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (id_a myAtom) %Undefined% &self)", _464874)
   Call: (273) [system] is_list(";;      !(metta (id_a myAtom) %Undefined% &self)")
^  Redo: (272) [user] mfix_vars1(";;      !(metta (id_a myAtom) %Undefined% &self)", _464874)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (id_a myAtom) %Undefined% &self)", _464874)
   Call: (273) [system] string(";;      !(metta (id_a myAtom) %Undefined% &self)")
   Exit: (273) [system] string(";;      !(metta (id_a myAtom) %Undefined% &self)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;      !(metta (id_a myAtom) %Undefined% &self)", _464874)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (id_a myAtom) %Undefined% &self)", _464874)
   Call: (273) [system] compound(";;      !(metta (id_a myAtom) %Undefined% &self)")
^  Redo: (272) [user] mfix_vars1(";;      !(metta (id_a myAtom) %Undefined% &self)", _464874)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (id_a myAtom) %Undefined% &self)", _464874)
^  Call: (273) [user] symbol(";;      !(metta (id_a myAtom) %Undefined% &self)")
^  Unify: (273) [user] symbol(";;      !(metta (id_a myAtom) %Undefined% &self)")
   Call: (274) [system] atom(";;      !(metta (id_a myAtom) %Undefined% &self)")
   Fail: (274) [system] atom(";;      !(metta (id_a myAtom) %Undefined% &self)")
^  Fail: (273) [user] symbol(";;      !(metta (id_a myAtom) %Undefined% &self)")
^  Redo: (272) [user] mfix_vars1(";;      !(metta (id_a myAtom) %Undefined% &self)", _464874)
   Call: (273) [system] ";;      !(metta (id_a myAtom) %Undefined% &self)"=_464874
   Exit: (273) [system] ";;      !(metta (id_a myAtom) %Undefined% &self)"=";;      !(metta (id_a myAtom) %Undefined% &self)"
^  Exit: (272) [user] mfix_vars1(";;      !(metta (id_a myAtom) %Undefined% &self)", ";;      !(metta (id_a myAtom) %Undefined% &self)")
   Call: (272) [apply] apply:maplist_([1117, 0], _464876, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1117, 0], [_502872|_502874], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1117, _502872)
^  Unify: (273) [user] mfix_vars1(1117, _502872)
   Call: (274) [system] var(1117)
^  Redo: (273) [user] mfix_vars1(1117, _502872)
^  Unify: (273) [user] mfix_vars1(1117, '$VAR'(_507518))
   Call: (274) [system] atom(1117)
^  Redo: (273) [user] mfix_vars1(1117, _502872)
^  Unify: (273) [user] mfix_vars1(1117, _502872)
   Call: (274) [system] 1117==true
^  Redo: (273) [user] mfix_vars1(1117, _502872)
^  Unify: (273) [user] mfix_vars1(1117, _502872)
   Call: (274) [system] 1117==false
^  Redo: (273) [user] mfix_vars1(1117, _502872)
^  Unify: (273) [user] mfix_vars1(1117, _502872)
   Call: (274) [system] 1117==[_516798, _516804]
^  Redo: (273) [user] mfix_vars1(1117, _502872)
^  Unify: (273) [user] mfix_vars1(1117, _502872)
   Call: (274) [system] is_list(1117)
^  Redo: (273) [user] mfix_vars1(1117, _502872)
^  Unify: (273) [user] mfix_vars1(1117, _502872)
   Call: (274) [system] string(1117)
^  Redo: (273) [user] mfix_vars1(1117, _6040)
^  Unify: (273) [user] mfix_vars1(1117, _6040)
   Call: (274) [system] compound(1117)
^  Redo: (273) [user] mfix_vars1(1117, _6040)
^  Unify: (273) [user] mfix_vars1(1117, _6040)
^  Call: (274) [user] symbol(1117)
^  Unify: (274) [user] symbol(1117)
   Call: (275) [system] atom(1117)
   Fail: (275) [system] atom(1117)
^  Fail: (274) [user] symbol(1117)
^  Redo: (273) [user] mfix_vars1(1117, _6040)
   Call: (274) [system] 1117=_6040
   Exit: (274) [system] 1117=1117
^  Exit: (273) [user] mfix_vars1(1117, 1117)
   Call: (273) [apply] apply:maplist_([0], _6042, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_19370|_19372], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _19370)
^  Unify: (274) [user] mfix_vars1(0, _19370)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _19370)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_24016))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _19370)
^  Unify: (274) [user] mfix_vars1(0, _19370)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _19370)
^  Unify: (274) [user] mfix_vars1(0, _19370)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _19370)
^  Unify: (274) [user] mfix_vars1(0, _19370)
   Call: (275) [system] 0==[_33296, _33302]
^  Redo: (274) [user] mfix_vars1(0, _19370)
^  Unify: (274) [user] mfix_vars1(0, _19370)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _19370)
^  Unify: (274) [user] mfix_vars1(0, _19370)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _19370)
^  Unify: (274) [user] mfix_vars1(0, _19370)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _19370)
^  Unify: (274) [user] mfix_vars1(0, _19370)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _19370)
   Call: (275) [system] 0=_19370
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _19372, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1117, 0], [1117, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0], [";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0], [";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0])
   Call: (270) [system] compound_name_arguments(_5988, '$COMMENT', [";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT', [";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0)))
   Call: (267) [system] '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0)\=@='$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _5974)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _69544))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _69544))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _69544))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _69544))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _69544)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _69544)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _75130))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _75130))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _75130)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _75130)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _75130)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0)))
   Call: (267) [system] '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0)\=@='$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _69544)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _5954))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _5954))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _5954))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _5954))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _5954)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _5954)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _97450))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _97450))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _97450)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _97450)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _97450)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0)))
   Call: (267) [system] '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0)\=@='$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _5954)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0)))
   Call: (261) [system] '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0)\=@='$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _126228, [], _126230)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _126228, [], _126230)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _126228, [], _126230)
   Call: (258) [system] atom('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _126228, [], _126230)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _126228, [], _126230)
   Call: (258) [system] compound('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
   Exit: (258) [system] compound('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), _135544, _135546)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT', [";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0])
^  Call: (258) [user] subst_vars([";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0], _137430, [], _126230)
^  Unify: (258) [user] subst_vars([";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0], [";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0], [], [])
   Call: (259) [system] var([";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0])
^  Redo: (258) [user] subst_vars([";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0], _137430, [], _126230)
^  Unify: (258) [user] subst_vars([";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0], [_141166|_141168], [], _126230)
^  Call: (259) [user] subst_vars(";;      !(metta (id_a myAtom) %Undefined% &self)", _141166, [], _142106)
^  Unify: (259) [user] subst_vars(";;      !(metta (id_a myAtom) %Undefined% &self)", ";;      !(metta (id_a myAtom) %Undefined% &self)", [], [])
   Call: (260) [system] var(";;      !(metta (id_a myAtom) %Undefined% &self)")
^  Redo: (259) [user] subst_vars(";;      !(metta (id_a myAtom) %Undefined% &self)", _141166, [], _142106)
^  Unify: (259) [user] subst_vars(";;      !(metta (id_a myAtom) %Undefined% &self)", _141166, [], _142106)
   Call: (260) [system] atom(";;      !(metta (id_a myAtom) %Undefined% &self)")
^  Redo: (259) [user] subst_vars(";;      !(metta (id_a myAtom) %Undefined% &self)", _141166, [], _142106)
^  Unify: (259) [user] subst_vars(";;      !(metta (id_a myAtom) %Undefined% &self)", _141166, [], _142106)
   Call: (260) [system] compound(";;      !(metta (id_a myAtom) %Undefined% &self)")
^  Redo: (259) [user] subst_vars(";;      !(metta (id_a myAtom) %Undefined% &self)", _141166, [], _142106)
^  Unify: (259) [user] subst_vars(";;      !(metta (id_a myAtom) %Undefined% &self)", ";;      !(metta (id_a myAtom) %Undefined% &self)", [], [])
^  Exit: (259) [user] subst_vars(";;      !(metta (id_a myAtom) %Undefined% &self)", ";;      !(metta (id_a myAtom) %Undefined% &self)", [], [])
^  Call: (259) [user] subst_vars([1117, 0], _141168, [], _126230)
^  Unify: (259) [user] subst_vars([1117, 0], [1117, 0], [], [])
   Call: (260) [system] var([1117, 0])
^  Redo: (259) [user] subst_vars([1117, 0], _141168, [], _126230)
^  Unify: (259) [user] subst_vars([1117, 0], [_157038|_157040], [], _126230)
^  Call: (260) [user] subst_vars(1117, _157038, [], _157978)
^  Unify: (260) [user] subst_vars(1117, 1117, [], [])
   Call: (261) [system] var(1117)
^  Redo: (260) [user] subst_vars(1117, _157038, [], _157978)
^  Unify: (260) [user] subst_vars(1117, _157038, [], _157978)
   Call: (261) [system] atom(1117)
^  Redo: (260) [user] subst_vars(1117, _157038, [], _157978)
^  Unify: (260) [user] subst_vars(1117, _157038, [], _157978)
   Call: (261) [system] compound(1117)
^  Redo: (260) [user] subst_vars(1117, _157038, [], _157978)
^  Unify: (260) [user] subst_vars(1117, 1117, [], [])
^  Exit: (260) [user] subst_vars(1117, 1117, [], [])
^  Call: (260) [user] subst_vars([0], _157040, [], _126230)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _157040, [], _126230)
^  Unify: (260) [user] subst_vars([0], [_172910|_172912], [], _126230)
^  Call: (261) [user] subst_vars(0, _172910, [], _173850)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _172910, [], _173850)
^  Unify: (261) [user] subst_vars(0, _172910, [], _173850)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _172910, [], _173850)
^  Unify: (261) [user] subst_vars(0, _172910, [], _173850)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _172910, [], _173850)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _172912, [], _126230)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _172912, [], _126230)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1117, 0], [1117, 0], [], [])
^  Exit: (258) [user] subst_vars([";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0], [";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0], [], [])
   Call: (258) [system] compound_name_arguments(_126228, '$COMMENT', [";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT', [";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), [], [])
   Call: (257) [system] _196268=metta_file_buffer(+, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      !(metta (id_a myAtom) %Undefined% &self)", 1117, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1118, 0, 41147, '$COMMENT'(";;     \";", 1118, 0), '$stream_position'(41147, 1118, 0, 41147)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \";", 1118, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \";", 1118, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     \";", 1118, 0), _248986))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     \";", 1118, 0), _248986))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     \";", 1118, 0), _248986)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     \";", 1118, 0), _248986)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     \";", 1118, 0), _248986)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     \";", 1118, 0), _248986)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     \";", 1118, 0), _254598))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     \";", 1118, 0), _254598))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     \";", 1118, 0), _254598))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     \";", 1118, 0), _254598))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \";", 1118, 0), _254598)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \";", 1118, 0), _254598)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     \";", 1118, 0), _260184))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     \";", 1118, 0), _260184))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     \";", 1118, 0), _260184)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     \";", 1118, 0), _260184)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1118, 0), _260184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1118, 0), _260184)
   Call: (270) [system] var('$COMMENT'(";;     \";", 1118, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1118, 0), _260184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1118, 0), '$VAR'(_267644))
   Call: (270) [system] atom('$COMMENT'(";;     \";", 1118, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1118, 0), _260184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1118, 0), _260184)
   Call: (270) [system] '$COMMENT'(";;     \";", 1118, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1118, 0), _260184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1118, 0), _260184)
   Call: (270) [system] '$COMMENT'(";;     \";", 1118, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1118, 0), _260184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1118, 0), _260184)
   Call: (270) [system] '$COMMENT'(";;     \";", 1118, 0)==[_276924, _276930]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1118, 0), _260184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1118, 0), _260184)
   Call: (270) [system] is_list('$COMMENT'(";;     \";", 1118, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1118, 0), _260184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1118, 0), _260184)
   Call: (270) [system] string('$COMMENT'(";;     \";", 1118, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1118, 0), _260184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1118, 0), _260184)
   Call: (270) [system] compound('$COMMENT'(";;     \";", 1118, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     \";", 1118, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     \";", 1118, 0), _287126, _287128)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     \";", 1118, 0), '$COMMENT', [";;     \";", 1118, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     \";", 1118, 0], _290868)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     \";", 1118, 0], _290868)
   Call: (271) [apply] apply:maplist_([";;     \";", 1118, 0], _290868, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     \";", 1118, 0], [_293686|_293688], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     \";", _293686)
^  Unify: (272) [user] mfix_vars1(";;     \";", _293686)
   Call: (273) [system] var(";;     \";")
^  Redo: (272) [user] mfix_vars1(";;     \";", _293686)
^  Unify: (272) [user] mfix_vars1(";;     \";", '$VAR'(_298332))
   Call: (273) [system] atom(";;     \";")
^  Redo: (272) [user] mfix_vars1(";;     \";", _293686)
^  Unify: (272) [user] mfix_vars1(";;     \";", _293686)
   Call: (273) [system] ";;     \";"==true
^  Redo: (272) [user] mfix_vars1(";;     \";", _293686)
^  Unify: (272) [user] mfix_vars1(";;     \";", _293686)
   Call: (273) [system] ";;     \";"==false
^  Redo: (272) [user] mfix_vars1(";;     \";", _293686)
^  Unify: (272) [user] mfix_vars1(";;     \";", _293686)
   Call: (273) [system] ";;     \";"==[_307612, _307618]
^  Redo: (272) [user] mfix_vars1(";;     \";", _293686)
^  Unify: (272) [user] mfix_vars1(";;     \";", _293686)
   Call: (273) [system] is_list(";;     \";")
^  Redo: (272) [user] mfix_vars1(";;     \";", _293686)
^  Unify: (272) [user] mfix_vars1(";;     \";", _293686)
   Call: (273) [system] string(";;     \";")
   Exit: (273) [system] string(";;     \";")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     \";", _293686)
^  Unify: (272) [user] mfix_vars1(";;     \";", _293686)
   Call: (273) [system] compound(";;     \";")
^  Redo: (272) [user] mfix_vars1(";;     \";", _293686)
^  Unify: (272) [user] mfix_vars1(";;     \";", _293686)
^  Call: (273) [user] symbol(";;     \";")
^  Unify: (273) [user] symbol(";;     \";")
   Call: (274) [system] atom(";;     \";")
   Fail: (274) [system] atom(";;     \";")
^  Fail: (273) [user] symbol(";;     \";")
^  Redo: (272) [user] mfix_vars1(";;     \";", _293686)
   Call: (273) [system] ";;     \";"=_293686
   Exit: (273) [system] ";;     \";"=";;     \";"
^  Exit: (272) [user] mfix_vars1(";;     \";", ";;     \";")
   Call: (272) [apply] apply:maplist_([1118, 0], _293688, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1118, 0], [_331684|_331686], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1118, _331684)
^  Unify: (273) [user] mfix_vars1(1118, _331684)
   Call: (274) [system] var(1118)
^  Redo: (273) [user] mfix_vars1(1118, _331684)
^  Unify: (273) [user] mfix_vars1(1118, '$VAR'(_336330))
   Call: (274) [system] atom(1118)
^  Redo: (273) [user] mfix_vars1(1118, _331684)
^  Unify: (273) [user] mfix_vars1(1118, _331684)
   Call: (274) [system] 1118==true
^  Redo: (273) [user] mfix_vars1(1118, _331684)
^  Unify: (273) [user] mfix_vars1(1118, _331684)
   Call: (274) [system] 1118==false
^  Redo: (273) [user] mfix_vars1(1118, _331684)
^  Unify: (273) [user] mfix_vars1(1118, _331684)
   Call: (274) [system] 1118==[_345610, _345616]
^  Redo: (273) [user] mfix_vars1(1118, _331684)
^  Unify: (273) [user] mfix_vars1(1118, _331684)
   Call: (274) [system] is_list(1118)
^  Redo: (273) [user] mfix_vars1(1118, _331684)
^  Unify: (273) [user] mfix_vars1(1118, _331684)
   Call: (274) [system] string(1118)
^  Redo: (273) [user] mfix_vars1(1118, _331684)
^  Unify: (273) [user] mfix_vars1(1118, _331684)
   Call: (274) [system] compound(1118)
^  Redo: (273) [user] mfix_vars1(1118, _331684)
^  Unify: (273) [user] mfix_vars1(1118, _331684)
^  Call: (274) [user] symbol(1118)
^  Unify: (274) [user] symbol(1118)
   Call: (275) [system] atom(1118)
   Fail: (275) [system] atom(1118)
^  Fail: (274) [user] symbol(1118)
^  Redo: (273) [user] mfix_vars1(1118, _331684)
   Call: (274) [system] 1118=_331684
   Exit: (274) [system] 1118=1118
^  Exit: (273) [user] mfix_vars1(1118, 1118)
   Call: (273) [apply] apply:maplist_([0], _331686, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_366010|_366012], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _366010)
^  Unify: (274) [user] mfix_vars1(0, _366010)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _366010)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_370656))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _366010)
^  Unify: (274) [user] mfix_vars1(0, _366010)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _366010)
^  Unify: (274) [user] mfix_vars1(0, _366010)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _366010)
^  Unify: (274) [user] mfix_vars1(0, _366010)
   Call: (275) [system] 0==[_379936, _379942]
^  Redo: (274) [user] mfix_vars1(0, _366010)
^  Unify: (274) [user] mfix_vars1(0, _366010)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _366010)
^  Unify: (274) [user] mfix_vars1(0, _366010)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _366010)
^  Unify: (274) [user] mfix_vars1(0, _366010)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _366010)
^  Unify: (274) [user] mfix_vars1(0, _366010)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _366010)
   Call: (275) [system] 0=_366010
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _366012, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1118, 0], [1118, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     \";", 1118, 0], [";;     \";", 1118, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     \";", 1118, 0], [";;     \";", 1118, 0])
   Call: (270) [system] compound_name_arguments(_260184, '$COMMENT', [";;     \";", 1118, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     \";", 1118, 0), '$COMMENT', [";;     \";", 1118, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0)))
   Call: (267) [system] '$COMMENT'(";;     \";", 1118, 0)\=@='$COMMENT'(";;     \";", 1118, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \";", 1118, 0), _254598)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     \";", 1118, 0), _416184))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     \";", 1118, 0), _416184))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     \";", 1118, 0), _416184))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     \";", 1118, 0), _416184))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \";", 1118, 0), _416184)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \";", 1118, 0), _416184)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     \";", 1118, 0), _421770))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     \";", 1118, 0), _421770))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     \";", 1118, 0), _421770)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     \";", 1118, 0), _421770)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     \";", 1118, 0), _421770)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0)))
   Call: (267) [system] '$COMMENT'(";;     \";", 1118, 0)\=@='$COMMENT'(";;     \";", 1118, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \";", 1118, 0), _416184)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     \";", 1118, 0), _248986))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     \";", 1118, 0), _248986))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     \";", 1118, 0), _248986))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     \";", 1118, 0), _248986))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \";", 1118, 0), _248986)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \";", 1118, 0), _248986)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     \";", 1118, 0), _444090))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     \";", 1118, 0), _444090))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     \";", 1118, 0), _444090)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     \";", 1118, 0), _444090)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     \";", 1118, 0), _444090)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0)))
   Call: (267) [system] '$COMMENT'(";;     \";", 1118, 0)\=@='$COMMENT'(";;     \";", 1118, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \";", 1118, 0), _248986)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0)))
   Call: (261) [system] '$COMMENT'(";;     \";", 1118, 0)\=@='$COMMENT'(";;     \";", 1118, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \";", 1118, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1118, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1118, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1118, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1118, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1118, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1118, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     \";", 1118, 0), _472868, [], _472870)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     \";", 1118, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     \";", 1118, 0), _472868, [], _472870)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \";", 1118, 0), _472868, [], _472870)
   Call: (258) [system] atom('$COMMENT'(";;     \";", 1118, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     \";", 1118, 0), _472868, [], _472870)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \";", 1118, 0), _472868, [], _472870)
   Call: (258) [system] compound('$COMMENT'(";;     \";", 1118, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     \";", 1118, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     \";", 1118, 0), _482184, _482186)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     \";", 1118, 0), '$COMMENT', [";;     \";", 1118, 0])
^  Call: (258) [user] subst_vars([";;     \";", 1118, 0], _484070, [], _472870)
^  Unify: (258) [user] subst_vars([";;     \";", 1118, 0], [";;     \";", 1118, 0], [], [])
   Call: (259) [system] var([";;     \";", 1118, 0])
^  Redo: (258) [user] subst_vars([";;     \";", 1118, 0], _484070, [], _472870)
^  Unify: (258) [user] subst_vars([";;     \";", 1118, 0], [_487806|_487808], [], _472870)
^  Call: (259) [user] subst_vars(";;     \";", _487806, [], _488746)
^  Unify: (259) [user] subst_vars(";;     \";", ";;     \";", [], [])
   Call: (260) [system] var(";;     \";")
^  Redo: (259) [user] subst_vars(";;     \";", _487806, [], _488746)
^  Unify: (259) [user] subst_vars(";;     \";", _487806, [], _488746)
   Call: (260) [system] atom(";;     \";")
^  Redo: (259) [user] subst_vars(";;     \";", _487806, [], _488746)
^  Unify: (259) [user] subst_vars(";;     \";", _487806, [], _488746)
   Call: (260) [system] compound(";;     \";")
^  Redo: (259) [user] subst_vars(";;     \";", _487806, [], _488746)
^  Unify: (259) [user] subst_vars(";;     \";", ";;     \";", [], [])
^  Exit: (259) [user] subst_vars(";;     \";", ";;     \";", [], [])
^  Call: (259) [user] subst_vars([1118, 0], _487808, [], _472870)
^  Unify: (259) [user] subst_vars([1118, 0], [1118, 0], [], [])
   Call: (260) [system] var([1118, 0])
^  Redo: (259) [user] subst_vars([1118, 0], _487808, [], _472870)
^  Unify: (259) [user] subst_vars([1118, 0], [_503678|_503680], [], _472870)
^  Call: (260) [user] subst_vars(1118, _503678, [], _504618)
^  Unify: (260) [user] subst_vars(1118, 1118, [], [])
   Call: (261) [system] var(1118)
^  Redo: (260) [user] subst_vars(1118, _503678, [], _504618)
^  Unify: (260) [user] subst_vars(1118, _503678, [], _504618)
   Call: (261) [system] atom(1118)
^  Redo: (260) [user] subst_vars(1118, _503678, [], _504618)
^  Unify: (260) [user] subst_vars(1118, _503678, [], _504618)
   Call: (261) [system] compound(1118)
^  Redo: (260) [user] subst_vars(1118, _503678, [], _504618)
^  Unify: (260) [user] subst_vars(1118, 1118, [], [])
^  Exit: (260) [user] subst_vars(1118, 1118, [], [])
^  Call: (260) [user] subst_vars([0], _503680, [], _472870)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _503680, [], _472870)
^  Unify: (260) [user] subst_vars([0], [_519550|_519552], [], _472870)
^  Call: (261) [user] subst_vars(0, _519550, [], _520490)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _5984, [], _5988)
^  Unify: (261) [user] subst_vars(0, _5984, [], _5988)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _5984, [], _5988)
^  Unify: (261) [user] subst_vars(0, _5984, [], _5988)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _5984, [], _5988)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _5986, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _5986, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1118, 0], [1118, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     \";", 1118, 0], [";;     \";", 1118, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5938, '$COMMENT', [";;     \";", 1118, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     \";", 1118, 0), '$COMMENT', [";;     \";", 1118, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     \";", 1118, 0), '$COMMENT'(";;     \";", 1118, 0), [], [])
   Call: (257) [system] _25030=metta_file_buffer(+, '$COMMENT'(";;     \";", 1118, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     \";", 1118, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     \";", 1118, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     \";", 1118, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     \";", 1118, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \";", 1118, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \";", 1118, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \";", 1118, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \";", 1118, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1119, 0, 41157, '$COMMENT'(";;", 1119, 0), '$stream_position'(41157, 1119, 0, 41157)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1119, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1119, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1119, 0), _77746))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1119, 0), _77746))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1119, 0), _77746)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1119, 0), _77746)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1119, 0), _77746)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1119, 0), _77746)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1119, 0), _83358))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1119, 0), _83358))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1119, 0), _83358))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1119, 0), _83358))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1119, 0), _83358)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1119, 0), _83358)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1119, 0), _88944))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1119, 0), _88944))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1119, 0), _88944)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1119, 0), _88944)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1119, 0), _88944)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1119, 0), _88944)
   Call: (270) [system] var('$COMMENT'(";;", 1119, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1119, 0), _88944)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1119, 0), '$VAR'(_96404))
   Call: (270) [system] atom('$COMMENT'(";;", 1119, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1119, 0), _88944)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1119, 0), _88944)
   Call: (270) [system] '$COMMENT'(";;", 1119, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1119, 0), _88944)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1119, 0), _88944)
   Call: (270) [system] '$COMMENT'(";;", 1119, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1119, 0), _88944)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1119, 0), _88944)
   Call: (270) [system] '$COMMENT'(";;", 1119, 0)==[_105684, _105690]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1119, 0), _88944)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1119, 0), _88944)
   Call: (270) [system] is_list('$COMMENT'(";;", 1119, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1119, 0), _88944)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1119, 0), _88944)
   Call: (270) [system] string('$COMMENT'(";;", 1119, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1119, 0), _88944)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1119, 0), _88944)
   Call: (270) [system] compound('$COMMENT'(";;", 1119, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1119, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1119, 0), _115886, _115888)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1119, 0), '$COMMENT', [";;", 1119, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1119, 0], _119628)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1119, 0], _119628)
   Call: (271) [apply] apply:maplist_([";;", 1119, 0], _119628, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1119, 0], [_122446|_122448], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _122446)
^  Unify: (272) [user] mfix_vars1(";;", _122446)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _122446)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_127092))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _122446)
^  Unify: (272) [user] mfix_vars1(";;", _122446)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _122446)
^  Unify: (272) [user] mfix_vars1(";;", _122446)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _122446)
^  Unify: (272) [user] mfix_vars1(";;", _122446)
   Call: (273) [system] ";;"==[_136372, _136378]
^  Redo: (272) [user] mfix_vars1(";;", _122446)
^  Unify: (272) [user] mfix_vars1(";;", _122446)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _122446)
^  Unify: (272) [user] mfix_vars1(";;", _122446)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _122446)
^  Unify: (272) [user] mfix_vars1(";;", _122446)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _122446)
^  Unify: (272) [user] mfix_vars1(";;", _122446)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _122446)
   Call: (273) [system] ";;"=_122446
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1119, 0], _122448, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1119, 0], [_160444|_160446], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1119, _160444)
^  Unify: (273) [user] mfix_vars1(1119, _160444)
   Call: (274) [system] var(1119)
^  Redo: (273) [user] mfix_vars1(1119, _160444)
^  Unify: (273) [user] mfix_vars1(1119, '$VAR'(_165090))
   Call: (274) [system] atom(1119)
^  Redo: (273) [user] mfix_vars1(1119, _160444)
^  Unify: (273) [user] mfix_vars1(1119, _160444)
   Call: (274) [system] 1119==true
^  Redo: (273) [user] mfix_vars1(1119, _160444)
^  Unify: (273) [user] mfix_vars1(1119, _160444)
   Call: (274) [system] 1119==false
^  Redo: (273) [user] mfix_vars1(1119, _160444)
^  Unify: (273) [user] mfix_vars1(1119, _160444)
   Call: (274) [system] 1119==[_174370, _174376]
^  Redo: (273) [user] mfix_vars1(1119, _160444)
^  Unify: (273) [user] mfix_vars1(1119, _160444)
   Call: (274) [system] is_list(1119)
^  Redo: (273) [user] mfix_vars1(1119, _160444)
^  Unify: (273) [user] mfix_vars1(1119, _160444)
   Call: (274) [system] string(1119)
^  Redo: (273) [user] mfix_vars1(1119, _160444)
^  Unify: (273) [user] mfix_vars1(1119, _160444)
   Call: (274) [system] compound(1119)
^  Redo: (273) [user] mfix_vars1(1119, _160444)
^  Unify: (273) [user] mfix_vars1(1119, _160444)
^  Call: (274) [user] symbol(1119)
^  Unify: (274) [user] symbol(1119)
   Call: (275) [system] atom(1119)
   Fail: (275) [system] atom(1119)
^  Fail: (274) [user] symbol(1119)
^  Redo: (273) [user] mfix_vars1(1119, _160444)
   Call: (274) [system] 1119=_160444
   Exit: (274) [system] 1119=1119
^  Exit: (273) [user] mfix_vars1(1119, 1119)
   Call: (273) [apply] apply:maplist_([0], _160446, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_194770|_194772], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _194770)
^  Unify: (274) [user] mfix_vars1(0, _194770)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _194770)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_199416))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _194770)
^  Unify: (274) [user] mfix_vars1(0, _194770)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _194770)
^  Unify: (274) [user] mfix_vars1(0, _194770)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _194770)
^  Unify: (274) [user] mfix_vars1(0, _194770)
   Call: (275) [system] 0==[_208696, _208702]
^  Redo: (274) [user] mfix_vars1(0, _194770)
^  Unify: (274) [user] mfix_vars1(0, _194770)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _194770)
^  Unify: (274) [user] mfix_vars1(0, _194770)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _194770)
^  Unify: (274) [user] mfix_vars1(0, _194770)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _194770)
^  Unify: (274) [user] mfix_vars1(0, _194770)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _194770)
   Call: (275) [system] 0=_194770
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _194772, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1119, 0], [1119, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1119, 0], [";;", 1119, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1119, 0], [";;", 1119, 0])
   Call: (270) [system] compound_name_arguments(_88944, '$COMMENT', [";;", 1119, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1119, 0), '$COMMENT', [";;", 1119, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1119, 0)\=@='$COMMENT'(";;", 1119, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1119, 0), _83358)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1119, 0), _244944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1119, 0), _244944))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1119, 0), _244944))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1119, 0), _244944))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1119, 0), _244944)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1119, 0), _244944)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1119, 0), _250530))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1119, 0), _250530))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1119, 0), _250530)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1119, 0), _250530)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1119, 0), _250530)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1119, 0)\=@='$COMMENT'(";;", 1119, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1119, 0), _244944)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1119, 0), _77746))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1119, 0), _77746))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1119, 0), _77746))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1119, 0), _77746))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1119, 0), _77746)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1119, 0), _77746)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1119, 0), _272850))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1119, 0), _272850))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1119, 0), _272850)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1119, 0), _272850)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1119, 0), _272850)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1119, 0)\=@='$COMMENT'(";;", 1119, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1119, 0), _77746)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1119, 0)\=@='$COMMENT'(";;", 1119, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1119, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1119, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1119, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1119, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1119, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1119, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1119, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1119, 0), _301628, [], _301630)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1119, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1119, 0), _301628, [], _301630)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1119, 0), _301628, [], _301630)
   Call: (258) [system] atom('$COMMENT'(";;", 1119, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1119, 0), _301628, [], _301630)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1119, 0), _301628, [], _301630)
   Call: (258) [system] compound('$COMMENT'(";;", 1119, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1119, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1119, 0), _310944, _310946)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1119, 0), '$COMMENT', [";;", 1119, 0])
^  Call: (258) [user] subst_vars([";;", 1119, 0], _312830, [], _301630)
^  Unify: (258) [user] subst_vars([";;", 1119, 0], [";;", 1119, 0], [], [])
   Call: (259) [system] var([";;", 1119, 0])
^  Redo: (258) [user] subst_vars([";;", 1119, 0], _312830, [], _301630)
^  Unify: (258) [user] subst_vars([";;", 1119, 0], [_316566|_316568], [], _301630)
^  Call: (259) [user] subst_vars(";;", _316566, [], _317506)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _316566, [], _317506)
^  Unify: (259) [user] subst_vars(";;", _316566, [], _317506)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _316566, [], _317506)
^  Unify: (259) [user] subst_vars(";;", _316566, [], _317506)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _316566, [], _317506)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1119, 0], _316568, [], _301630)
^  Unify: (259) [user] subst_vars([1119, 0], [1119, 0], [], [])
   Call: (260) [system] var([1119, 0])
^  Redo: (259) [user] subst_vars([1119, 0], _316568, [], _301630)
^  Unify: (259) [user] subst_vars([1119, 0], [_332438|_332440], [], _301630)
^  Call: (260) [user] subst_vars(1119, _332438, [], _333378)
^  Unify: (260) [user] subst_vars(1119, 1119, [], [])
   Call: (261) [system] var(1119)
^  Redo: (260) [user] subst_vars(1119, _332438, [], _333378)
^  Unify: (260) [user] subst_vars(1119, _332438, [], _333378)
   Call: (261) [system] atom(1119)
^  Redo: (260) [user] subst_vars(1119, _332438, [], _333378)
^  Unify: (260) [user] subst_vars(1119, _332438, [], _333378)
   Call: (261) [system] compound(1119)
^  Redo: (260) [user] subst_vars(1119, _332438, [], _333378)
^  Unify: (260) [user] subst_vars(1119, 1119, [], [])
^  Exit: (260) [user] subst_vars(1119, 1119, [], [])
^  Call: (260) [user] subst_vars([0], _332440, [], _301630)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _332440, [], _301630)
^  Unify: (260) [user] subst_vars([0], [_348310|_348312], [], _301630)
^  Call: (261) [user] subst_vars(0, _348310, [], _349250)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _348310, [], _349250)
^  Unify: (261) [user] subst_vars(0, _348310, [], _349250)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _348310, [], _349250)
^  Unify: (261) [user] subst_vars(0, _348310, [], _349250)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _348310, [], _349250)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _348312, [], _301630)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _348312, [], _301630)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1119, 0], [1119, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1119, 0], [";;", 1119, 0], [], [])
   Call: (258) [system] compound_name_arguments(_301628, '$COMMENT', [";;", 1119, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1119, 0), '$COMMENT', [";;", 1119, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1119, 0), '$COMMENT'(";;", 1119, 0), [], [])
   Call: (257) [system] _371668=metta_file_buffer(+, '$COMMENT'(";;", 1119, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1119, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1119, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1119, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1119, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1119, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1119, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1119, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1119, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1120, 0, 41160, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$stream_position'(41160, 1120, 0, 41160)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _424398))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _424398))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _424398)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _424398)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _424398)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _424398)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _430010))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _430010))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _430010))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _430010))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _430010)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _430010)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _435596))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _435596))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _435596)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _435596)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _435596)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _435596)
   Call: (270) [system] var('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _435596)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$VAR'(_443056))
   Call: (270) [system] atom('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _435596)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _435596)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _435596)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _435596)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _435596)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _435596)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0)==[_452336, _452342]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _435596)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _435596)
   Call: (270) [system] is_list('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _435596)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _435596)
   Call: (270) [system] string('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _435596)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _435596)
   Call: (270) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _462538, _462540)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0], _466280)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0], _466280)
   Call: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0], _466280, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0], [_469098|_469100], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _469098)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _469098)
   Call: (273) [system] var(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _469098)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", '$VAR'(_473744))
   Call: (273) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _469098)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _469098)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==true
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _469098)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _469098)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==false
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _469098)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _469098)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==[_483024, _483030]
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _469098)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _469098)
   Call: (273) [system] is_list(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _469098)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _469098)
   Call: (273) [system] string(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Exit: (273) [system] string(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _469098)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _469098)
   Call: (273) [system] compound(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _469098)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _469098)
^  Call: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Unify: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (274) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Fail: (274) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Fail: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _469098)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"=_469098
   Exit: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"=";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"
^  Exit: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (272) [apply] apply:maplist_([1120, 0], _469100, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1120, 0], [_507096|_507098], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1120, _507096)
^  Unify: (273) [user] mfix_vars1(1120, _507096)
   Call: (274) [system] var(1120)
^  Redo: (273) [user] mfix_vars1(1120, _507096)
^  Unify: (273) [user] mfix_vars1(1120, '$VAR'(_511742))
   Call: (274) [system] atom(1120)
^  Redo: (273) [user] mfix_vars1(1120, _507096)
^  Unify: (273) [user] mfix_vars1(1120, _507096)
   Call: (274) [system] 1120==true
^  Redo: (273) [user] mfix_vars1(1120, _507096)
^  Unify: (273) [user] mfix_vars1(1120, _507096)
   Call: (274) [system] 1120==false
^  Redo: (273) [user] mfix_vars1(1120, _507096)
^  Unify: (273) [user] mfix_vars1(1120, _507096)
   Call: (274) [system] 1120==[_521022, _521028]
^  Redo: (273) [user] mfix_vars1(1120, _507096)
^  Unify: (273) [user] mfix_vars1(1120, _507096)
   Call: (274) [system] is_list(1120)
^  Redo: (273) [user] mfix_vars1(1120, _6042)
^  Unify: (273) [user] mfix_vars1(1120, _6042)
   Call: (274) [system] string(1120)
^  Redo: (273) [user] mfix_vars1(1120, _6042)
^  Unify: (273) [user] mfix_vars1(1120, _6042)
   Call: (274) [system] compound(1120)
^  Redo: (273) [user] mfix_vars1(1120, _6042)
^  Unify: (273) [user] mfix_vars1(1120, _6042)
^  Call: (274) [user] symbol(1120)
^  Unify: (274) [user] symbol(1120)
   Call: (275) [system] atom(1120)
   Fail: (275) [system] atom(1120)
^  Fail: (274) [user] symbol(1120)
^  Redo: (273) [user] mfix_vars1(1120, _6042)
   Call: (274) [system] 1120=_6042
   Exit: (274) [system] 1120=1120
^  Exit: (273) [user] mfix_vars1(1120, 1120)
   Call: (273) [apply] apply:maplist_([0], _6044, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_23474|_23476], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _23474)
^  Unify: (274) [user] mfix_vars1(0, _23474)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _23474)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_28120))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _23474)
^  Unify: (274) [user] mfix_vars1(0, _23474)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _23474)
^  Unify: (274) [user] mfix_vars1(0, _23474)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _23474)
^  Unify: (274) [user] mfix_vars1(0, _23474)
   Call: (275) [system] 0==[_37400, _37406]
^  Redo: (274) [user] mfix_vars1(0, _23474)
^  Unify: (274) [user] mfix_vars1(0, _23474)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _23474)
^  Unify: (274) [user] mfix_vars1(0, _23474)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _23474)
^  Unify: (274) [user] mfix_vars1(0, _23474)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _23474)
^  Unify: (274) [user] mfix_vars1(0, _23474)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _23474)
   Call: (275) [system] 0=_23474
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _23476, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1120, 0], [1120, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0])
   Call: (270) [system] compound_name_arguments(_5990, '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _5976)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _73648))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _73648))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _73648))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _73648))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _73648)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _73648)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _79234))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _79234))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _79234)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _79234)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _79234)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _73648)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _5956))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _5956))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _5956))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _5956))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _5956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _5956)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _101554))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _101554))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _101554)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _101554)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _101554)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _5956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0)))
   Call: (261) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _130332, [], _130334)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _130332, [], _130334)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _130332, [], _130334)
   Call: (258) [system] atom('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _130332, [], _130334)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _130332, [], _130334)
   Call: (258) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), _139648, _139650)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0])
^  Call: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0], _141534, [], _130334)
^  Unify: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0], [], [])
   Call: (259) [system] var([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0])
^  Redo: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0], _141534, [], _130334)
^  Unify: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0], [_145270|_145272], [], _130334)
^  Call: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _145270, [], _146210)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
   Call: (260) [system] var(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _145270, [], _146210)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _145270, [], _146210)
   Call: (260) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _145270, [], _146210)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _145270, [], _146210)
   Call: (260) [system] compound(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _145270, [], _146210)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Exit: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Call: (259) [user] subst_vars([1120, 0], _145272, [], _130334)
^  Unify: (259) [user] subst_vars([1120, 0], [1120, 0], [], [])
   Call: (260) [system] var([1120, 0])
^  Redo: (259) [user] subst_vars([1120, 0], _145272, [], _130334)
^  Unify: (259) [user] subst_vars([1120, 0], [_161142|_161144], [], _130334)
^  Call: (260) [user] subst_vars(1120, _161142, [], _162082)
^  Unify: (260) [user] subst_vars(1120, 1120, [], [])
   Call: (261) [system] var(1120)
^  Redo: (260) [user] subst_vars(1120, _161142, [], _162082)
^  Unify: (260) [user] subst_vars(1120, _161142, [], _162082)
   Call: (261) [system] atom(1120)
^  Redo: (260) [user] subst_vars(1120, _161142, [], _162082)
^  Unify: (260) [user] subst_vars(1120, _161142, [], _162082)
   Call: (261) [system] compound(1120)
^  Redo: (260) [user] subst_vars(1120, _161142, [], _162082)
^  Unify: (260) [user] subst_vars(1120, 1120, [], [])
^  Exit: (260) [user] subst_vars(1120, 1120, [], [])
^  Call: (260) [user] subst_vars([0], _161144, [], _130334)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _161144, [], _130334)
^  Unify: (260) [user] subst_vars([0], [_177014|_177016], [], _130334)
^  Call: (261) [user] subst_vars(0, _177014, [], _177954)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _177014, [], _177954)
^  Unify: (261) [user] subst_vars(0, _177014, [], _177954)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _177014, [], _177954)
^  Unify: (261) [user] subst_vars(0, _177014, [], _177954)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _177014, [], _177954)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _177016, [], _130334)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _177016, [], _130334)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1120, 0], [1120, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0], [], [])
   Call: (258) [system] compound_name_arguments(_130332, '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), [], [])
   Call: (257) [system] _200372=metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1120, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1121, 0, 41221, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$stream_position'(41221, 1121, 0, 41221)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _253108))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _253108))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _253108)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _253108)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _253108)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _253108)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _258720))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _258720))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _258720))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _258720))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _258720)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _258720)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _264306))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _264306))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _264306)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _264306)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _264306)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _264306)
   Call: (270) [system] var('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _264306)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$VAR'(_271766))
   Call: (270) [system] atom('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _264306)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _264306)
   Call: (270) [system] '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _264306)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _264306)
   Call: (270) [system] '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _264306)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _264306)
   Call: (270) [system] '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0)==[_281046, _281052]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _264306)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _264306)
   Call: (270) [system] is_list('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _264306)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _264306)
   Call: (270) [system] string('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _264306)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _264306)
   Call: (270) [system] compound('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _291248, _291250)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT', [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0], _294990)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0], _294990)
   Call: (271) [apply] apply:maplist_([";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0], _294990, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0], [_297808|_297810], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _297808)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _297808)
   Call: (273) [system] var(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _297808)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", '$VAR'(_302454))
   Call: (273) [system] atom(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _297808)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _297808)
   Call: (273) [system] ";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),"==true
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _297808)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _297808)
   Call: (273) [system] ";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),"==false
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _297808)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _297808)
   Call: (273) [system] ";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),"==[_311734, _311740]
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _297808)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _297808)
   Call: (273) [system] is_list(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _297808)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _297808)
   Call: (273) [system] string(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
   Exit: (273) [system] string(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _297808)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _297808)
   Call: (273) [system] compound(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _297808)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _297808)
^  Call: (273) [user] symbol(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
^  Unify: (273) [user] symbol(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
   Call: (274) [system] atom(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
   Fail: (274) [system] atom(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
^  Fail: (273) [user] symbol(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _297808)
   Call: (273) [system] ";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),"=_297808
   Exit: (273) [system] ";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),"=";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),"
^  Exit: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", ";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
   Call: (272) [apply] apply:maplist_([1121, 0], _297810, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1121, 0], [_335806|_335808], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1121, _335806)
^  Unify: (273) [user] mfix_vars1(1121, _335806)
   Call: (274) [system] var(1121)
^  Redo: (273) [user] mfix_vars1(1121, _335806)
^  Unify: (273) [user] mfix_vars1(1121, '$VAR'(_340452))
   Call: (274) [system] atom(1121)
^  Redo: (273) [user] mfix_vars1(1121, _335806)
^  Unify: (273) [user] mfix_vars1(1121, _335806)
   Call: (274) [system] 1121==true
^  Redo: (273) [user] mfix_vars1(1121, _335806)
^  Unify: (273) [user] mfix_vars1(1121, _335806)
   Call: (274) [system] 1121==false
^  Redo: (273) [user] mfix_vars1(1121, _335806)
^  Unify: (273) [user] mfix_vars1(1121, _335806)
   Call: (274) [system] 1121==[_349732, _349738]
^  Redo: (273) [user] mfix_vars1(1121, _335806)
^  Unify: (273) [user] mfix_vars1(1121, _335806)
   Call: (274) [system] is_list(1121)
^  Redo: (273) [user] mfix_vars1(1121, _335806)
^  Unify: (273) [user] mfix_vars1(1121, _335806)
   Call: (274) [system] string(1121)
^  Redo: (273) [user] mfix_vars1(1121, _335806)
^  Unify: (273) [user] mfix_vars1(1121, _335806)
   Call: (274) [system] compound(1121)
^  Redo: (273) [user] mfix_vars1(1121, _335806)
^  Unify: (273) [user] mfix_vars1(1121, _335806)
^  Call: (274) [user] symbol(1121)
^  Unify: (274) [user] symbol(1121)
   Call: (275) [system] atom(1121)
   Fail: (275) [system] atom(1121)
^  Fail: (274) [user] symbol(1121)
^  Redo: (273) [user] mfix_vars1(1121, _335806)
   Call: (274) [system] 1121=_335806
   Exit: (274) [system] 1121=1121
^  Exit: (273) [user] mfix_vars1(1121, 1121)
   Call: (273) [apply] apply:maplist_([0], _335808, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_370132|_370134], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _370132)
^  Unify: (274) [user] mfix_vars1(0, _370132)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _370132)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_374778))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _370132)
^  Unify: (274) [user] mfix_vars1(0, _370132)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _370132)
^  Unify: (274) [user] mfix_vars1(0, _370132)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _370132)
^  Unify: (274) [user] mfix_vars1(0, _370132)
   Call: (275) [system] 0==[_384058, _384064]
^  Redo: (274) [user] mfix_vars1(0, _370132)
^  Unify: (274) [user] mfix_vars1(0, _370132)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _370132)
^  Unify: (274) [user] mfix_vars1(0, _370132)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _370132)
^  Unify: (274) [user] mfix_vars1(0, _370132)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _370132)
^  Unify: (274) [user] mfix_vars1(0, _370132)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _370132)
   Call: (275) [system] 0=_370132
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _370134, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1121, 0], [1121, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0], [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0], [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0])
   Call: (270) [system] compound_name_arguments(_264306, '$COMMENT', [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT', [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0)))
   Call: (267) [system] '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0)\=@='$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _258720)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _420306))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _420306))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _420306))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _420306))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _420306)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _420306)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _425892))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _425892))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _425892)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _425892)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _425892)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0)))
   Call: (267) [system] '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0)\=@='$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _420306)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _253108))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _253108))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _253108))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _253108))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _253108)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _253108)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _448212))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _448212))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _448212)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _448212)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _448212)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0)))
   Call: (267) [system] '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0)\=@='$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _253108)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0)))
   Call: (261) [system] '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0)\=@='$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _476990, [], _476992)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _476990, [], _476992)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _476990, [], _476992)
   Call: (258) [system] atom('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _476990, [], _476992)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _476990, [], _476992)
   Call: (258) [system] compound('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), _486306, _486308)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT', [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0])
^  Call: (258) [user] subst_vars([";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0], _488192, [], _476992)
^  Unify: (258) [user] subst_vars([";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0], [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0], [], [])
   Call: (259) [system] var([";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0])
^  Redo: (258) [user] subst_vars([";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0], _488192, [], _476992)
^  Unify: (258) [user] subst_vars([";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0], [_491928|_491930], [], _476992)
^  Call: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _491928, [], _492868)
^  Unify: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", ";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", [], [])
   Call: (260) [system] var(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
^  Redo: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _491928, [], _492868)
^  Unify: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _491928, [], _492868)
   Call: (260) [system] atom(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
^  Redo: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _491928, [], _492868)
^  Unify: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _491928, [], _492868)
   Call: (260) [system] compound(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
^  Redo: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _491928, [], _492868)
^  Unify: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", ";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", [], [])
^  Exit: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", ";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", [], [])
^  Call: (259) [user] subst_vars([1121, 0], _491930, [], _476992)
^  Unify: (259) [user] subst_vars([1121, 0], [1121, 0], [], [])
   Call: (260) [system] var([1121, 0])
^  Redo: (259) [user] subst_vars([1121, 0], _491930, [], _476992)
^  Unify: (259) [user] subst_vars([1121, 0], [_507800|_507802], [], _476992)
^  Call: (260) [user] subst_vars(1121, _507800, [], _508740)
^  Unify: (260) [user] subst_vars(1121, 1121, [], [])
   Call: (261) [system] var(1121)
^  Redo: (260) [user] subst_vars(1121, _507800, [], _508740)
^  Unify: (260) [user] subst_vars(1121, _507800, [], _508740)
   Call: (261) [system] atom(1121)
^  Redo: (260) [user] subst_vars(1121, _507800, [], _508740)
^  Unify: (260) [user] subst_vars(1121, _507800, [], _508740)
   Call: (261) [system] compound(1121)
^  Redo: (260) [user] subst_vars(1121, _507800, [], _508740)
^  Unify: (260) [user] subst_vars(1121, 1121, [], [])
^  Exit: (260) [user] subst_vars(1121, 1121, [], [])
^  Call: (260) [user] subst_vars([0], _507802, [], _476992)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _507802, [], _476992)
^  Unify: (260) [user] subst_vars([0], [_6004|_6006], [], _5958)
^  Call: (261) [user] subst_vars(0, _6004, [], _6682)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _6004, [], _6682)
^  Unify: (261) [user] subst_vars(0, _6004, [], _6682)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _6004, [], _6682)
^  Unify: (261) [user] subst_vars(0, _6004, [], _6682)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _6004, [], _6682)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _6006, [], _5958)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _6006, [], _5958)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1121, 0], [1121, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0], [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5956, '$COMMENT', [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT', [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), [], [])
   Call: (257) [system] _29100=metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1121, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1122, 0, 41305, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$stream_position'(41305, 1122, 0, 41305)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _81824))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _81824))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _81824)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _81824)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _81824)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _81824)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _87436))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _87436))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _87436))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _87436))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _87436)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _87436)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _93022))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _93022))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _93022)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _93022)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _93022)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _93022)
   Call: (270) [system] var('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _93022)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$VAR'(_100482))
   Call: (270) [system] atom('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _93022)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _93022)
   Call: (270) [system] '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _93022)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _93022)
   Call: (270) [system] '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _93022)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _93022)
   Call: (270) [system] '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0)==[_109762, _109768]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _93022)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _93022)
   Call: (270) [system] is_list('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _93022)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _93022)
   Call: (270) [system] string('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _93022)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _93022)
   Call: (270) [system] compound('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _119964, _119966)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT', [";;         |_| Atom::gnd(ID_NUM));", 1122, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         |_| Atom::gnd(ID_NUM));", 1122, 0], _123706)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         |_| Atom::gnd(ID_NUM));", 1122, 0], _123706)
   Call: (271) [apply] apply:maplist_([";;         |_| Atom::gnd(ID_NUM));", 1122, 0], _123706, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         |_| Atom::gnd(ID_NUM));", 1122, 0], [_126524|_126526], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _126524)
^  Unify: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _126524)
   Call: (273) [system] var(";;         |_| Atom::gnd(ID_NUM));")
^  Redo: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _126524)
^  Unify: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", '$VAR'(_131170))
   Call: (273) [system] atom(";;         |_| Atom::gnd(ID_NUM));")
^  Redo: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _126524)
^  Unify: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _126524)
   Call: (273) [system] ";;         |_| Atom::gnd(ID_NUM));"==true
^  Redo: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _126524)
^  Unify: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _126524)
   Call: (273) [system] ";;         |_| Atom::gnd(ID_NUM));"==false
^  Redo: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _126524)
^  Unify: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _126524)
   Call: (273) [system] ";;         |_| Atom::gnd(ID_NUM));"==[_140450, _140456]
^  Redo: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _126524)
^  Unify: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _126524)
   Call: (273) [system] is_list(";;         |_| Atom::gnd(ID_NUM));")
^  Redo: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _126524)
^  Unify: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _126524)
   Call: (273) [system] string(";;         |_| Atom::gnd(ID_NUM));")
   Exit: (273) [system] string(";;         |_| Atom::gnd(ID_NUM));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _126524)
^  Unify: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _126524)
   Call: (273) [system] compound(";;         |_| Atom::gnd(ID_NUM));")
^  Redo: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _126524)
^  Unify: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _126524)
^  Call: (273) [user] symbol(";;         |_| Atom::gnd(ID_NUM));")
^  Unify: (273) [user] symbol(";;         |_| Atom::gnd(ID_NUM));")
   Call: (274) [system] atom(";;         |_| Atom::gnd(ID_NUM));")
   Fail: (274) [system] atom(";;         |_| Atom::gnd(ID_NUM));")
^  Fail: (273) [user] symbol(";;         |_| Atom::gnd(ID_NUM));")
^  Redo: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _126524)
   Call: (273) [system] ";;         |_| Atom::gnd(ID_NUM));"=_126524
   Exit: (273) [system] ";;         |_| Atom::gnd(ID_NUM));"=";;         |_| Atom::gnd(ID_NUM));"
^  Exit: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", ";;         |_| Atom::gnd(ID_NUM));")
   Call: (272) [apply] apply:maplist_([1122, 0], _126526, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1122, 0], [_164522|_164524], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1122, _164522)
^  Unify: (273) [user] mfix_vars1(1122, _164522)
   Call: (274) [system] var(1122)
^  Redo: (273) [user] mfix_vars1(1122, _164522)
^  Unify: (273) [user] mfix_vars1(1122, '$VAR'(_169168))
   Call: (274) [system] atom(1122)
^  Redo: (273) [user] mfix_vars1(1122, _164522)
^  Unify: (273) [user] mfix_vars1(1122, _164522)
   Call: (274) [system] 1122==true
^  Redo: (273) [user] mfix_vars1(1122, _164522)
^  Unify: (273) [user] mfix_vars1(1122, _164522)
   Call: (274) [system] 1122==false
^  Redo: (273) [user] mfix_vars1(1122, _164522)
^  Unify: (273) [user] mfix_vars1(1122, _164522)
   Call: (274) [system] 1122==[_178448, _178454]
^  Redo: (273) [user] mfix_vars1(1122, _164522)
^  Unify: (273) [user] mfix_vars1(1122, _164522)
   Call: (274) [system] is_list(1122)
^  Redo: (273) [user] mfix_vars1(1122, _164522)
^  Unify: (273) [user] mfix_vars1(1122, _164522)
   Call: (274) [system] string(1122)
^  Redo: (273) [user] mfix_vars1(1122, _164522)
^  Unify: (273) [user] mfix_vars1(1122, _164522)
   Call: (274) [system] compound(1122)
^  Redo: (273) [user] mfix_vars1(1122, _164522)
^  Unify: (273) [user] mfix_vars1(1122, _164522)
^  Call: (274) [user] symbol(1122)
^  Unify: (274) [user] symbol(1122)
   Call: (275) [system] atom(1122)
   Fail: (275) [system] atom(1122)
^  Fail: (274) [user] symbol(1122)
^  Redo: (273) [user] mfix_vars1(1122, _164522)
   Call: (274) [system] 1122=_164522
   Exit: (274) [system] 1122=1122
^  Exit: (273) [user] mfix_vars1(1122, 1122)
   Call: (273) [apply] apply:maplist_([0], _164524, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_198848|_198850], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _198848)
^  Unify: (274) [user] mfix_vars1(0, _198848)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _198848)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_203494))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _198848)
^  Unify: (274) [user] mfix_vars1(0, _198848)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _198848)
^  Unify: (274) [user] mfix_vars1(0, _198848)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _198848)
^  Unify: (274) [user] mfix_vars1(0, _198848)
   Call: (275) [system] 0==[_212774, _212780]
^  Redo: (274) [user] mfix_vars1(0, _198848)
^  Unify: (274) [user] mfix_vars1(0, _198848)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _198848)
^  Unify: (274) [user] mfix_vars1(0, _198848)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _198848)
^  Unify: (274) [user] mfix_vars1(0, _198848)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _198848)
^  Unify: (274) [user] mfix_vars1(0, _198848)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _198848)
   Call: (275) [system] 0=_198848
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _198850, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1122, 0], [1122, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         |_| Atom::gnd(ID_NUM));", 1122, 0], [";;         |_| Atom::gnd(ID_NUM));", 1122, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         |_| Atom::gnd(ID_NUM));", 1122, 0], [";;         |_| Atom::gnd(ID_NUM));", 1122, 0])
   Call: (270) [system] compound_name_arguments(_93022, '$COMMENT', [";;         |_| Atom::gnd(ID_NUM));", 1122, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT', [";;         |_| Atom::gnd(ID_NUM));", 1122, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0)))
   Call: (267) [system] '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0)\=@='$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _87436)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _249022))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _249022))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _249022))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _249022))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _249022)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _249022)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _254608))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _254608))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _254608)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _254608)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _254608)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0)))
   Call: (267) [system] '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0)\=@='$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _249022)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _81824))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _81824))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _81824))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _81824))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _81824)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _81824)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _276928))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _276928))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _276928)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _276928)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _276928)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0)))
   Call: (267) [system] '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0)\=@='$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _81824)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0)))
   Call: (261) [system] '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0)\=@='$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _305706, [], _305708)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _305706, [], _305708)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _305706, [], _305708)
   Call: (258) [system] atom('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _305706, [], _305708)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _305706, [], _305708)
   Call: (258) [system] compound('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), _315022, _315024)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT', [";;         |_| Atom::gnd(ID_NUM));", 1122, 0])
^  Call: (258) [user] subst_vars([";;         |_| Atom::gnd(ID_NUM));", 1122, 0], _316908, [], _305708)
^  Unify: (258) [user] subst_vars([";;         |_| Atom::gnd(ID_NUM));", 1122, 0], [";;         |_| Atom::gnd(ID_NUM));", 1122, 0], [], [])
   Call: (259) [system] var([";;         |_| Atom::gnd(ID_NUM));", 1122, 0])
^  Redo: (258) [user] subst_vars([";;         |_| Atom::gnd(ID_NUM));", 1122, 0], _316908, [], _305708)
^  Unify: (258) [user] subst_vars([";;         |_| Atom::gnd(ID_NUM));", 1122, 0], [_320644|_320646], [], _305708)
^  Call: (259) [user] subst_vars(";;         |_| Atom::gnd(ID_NUM));", _320644, [], _321584)
^  Unify: (259) [user] subst_vars(";;         |_| Atom::gnd(ID_NUM));", ";;         |_| Atom::gnd(ID_NUM));", [], [])
   Call: (260) [system] var(";;         |_| Atom::gnd(ID_NUM));")
^  Redo: (259) [user] subst_vars(";;         |_| Atom::gnd(ID_NUM));", _320644, [], _321584)
^  Unify: (259) [user] subst_vars(";;         |_| Atom::gnd(ID_NUM));", _320644, [], _321584)
   Call: (260) [system] atom(";;         |_| Atom::gnd(ID_NUM));")
^  Redo: (259) [user] subst_vars(";;         |_| Atom::gnd(ID_NUM));", _320644, [], _321584)
^  Unify: (259) [user] subst_vars(";;         |_| Atom::gnd(ID_NUM));", _320644, [], _321584)
   Call: (260) [system] compound(";;         |_| Atom::gnd(ID_NUM));")
^  Redo: (259) [user] subst_vars(";;         |_| Atom::gnd(ID_NUM));", _320644, [], _321584)
^  Unify: (259) [user] subst_vars(";;         |_| Atom::gnd(ID_NUM));", ";;         |_| Atom::gnd(ID_NUM));", [], [])
^  Exit: (259) [user] subst_vars(";;         |_| Atom::gnd(ID_NUM));", ";;         |_| Atom::gnd(ID_NUM));", [], [])
^  Call: (259) [user] subst_vars([1122, 0], _320646, [], _305708)
^  Unify: (259) [user] subst_vars([1122, 0], [1122, 0], [], [])
   Call: (260) [system] var([1122, 0])
^  Redo: (259) [user] subst_vars([1122, 0], _320646, [], _305708)
^  Unify: (259) [user] subst_vars([1122, 0], [_336516|_336518], [], _305708)
^  Call: (260) [user] subst_vars(1122, _336516, [], _337456)
^  Unify: (260) [user] subst_vars(1122, 1122, [], [])
   Call: (261) [system] var(1122)
^  Redo: (260) [user] subst_vars(1122, _336516, [], _337456)
^  Unify: (260) [user] subst_vars(1122, _336516, [], _337456)
   Call: (261) [system] atom(1122)
^  Redo: (260) [user] subst_vars(1122, _336516, [], _337456)
^  Unify: (260) [user] subst_vars(1122, _336516, [], _337456)
   Call: (261) [system] compound(1122)
^  Redo: (260) [user] subst_vars(1122, _336516, [], _337456)
^  Unify: (260) [user] subst_vars(1122, 1122, [], [])
^  Exit: (260) [user] subst_vars(1122, 1122, [], [])
^  Call: (260) [user] subst_vars([0], _336518, [], _305708)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _336518, [], _305708)
^  Unify: (260) [user] subst_vars([0], [_352388|_352390], [], _305708)
^  Call: (261) [user] subst_vars(0, _352388, [], _353328)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _352388, [], _353328)
^  Unify: (261) [user] subst_vars(0, _352388, [], _353328)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _352388, [], _353328)
^  Unify: (261) [user] subst_vars(0, _352388, [], _353328)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _352388, [], _353328)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _352390, [], _305708)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _352390, [], _305708)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1122, 0], [1122, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         |_| Atom::gnd(ID_NUM));", 1122, 0], [";;         |_| Atom::gnd(ID_NUM));", 1122, 0], [], [])
   Call: (258) [system] compound_name_arguments(_305706, '$COMMENT', [";;         |_| Atom::gnd(ID_NUM));", 1122, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT', [";;         |_| Atom::gnd(ID_NUM));", 1122, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), [], [])
   Call: (257) [system] _375746=metta_file_buffer(+, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1122, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1123, 0, 41340, '$COMMENT'(";;", 1123, 0), '$stream_position'(41340, 1123, 0, 41340)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1123, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1123, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1123, 0), _428462))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1123, 0), _428462))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1123, 0), _428462)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1123, 0), _428462)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1123, 0), _428462)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1123, 0), _428462)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1123, 0), _434074))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1123, 0), _434074))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1123, 0), _434074))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1123, 0), _434074))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1123, 0), _434074)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1123, 0), _434074)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1123, 0), _439660))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1123, 0), _439660))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1123, 0), _439660)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1123, 0), _439660)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1123, 0), _439660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1123, 0), _439660)
   Call: (270) [system] var('$COMMENT'(";;", 1123, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1123, 0), _439660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1123, 0), '$VAR'(_447120))
   Call: (270) [system] atom('$COMMENT'(";;", 1123, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1123, 0), _439660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1123, 0), _439660)
   Call: (270) [system] '$COMMENT'(";;", 1123, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1123, 0), _439660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1123, 0), _439660)
   Call: (270) [system] '$COMMENT'(";;", 1123, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1123, 0), _439660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1123, 0), _439660)
   Call: (270) [system] '$COMMENT'(";;", 1123, 0)==[_456400, _456406]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1123, 0), _439660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1123, 0), _439660)
   Call: (270) [system] is_list('$COMMENT'(";;", 1123, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1123, 0), _439660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1123, 0), _439660)
   Call: (270) [system] string('$COMMENT'(";;", 1123, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1123, 0), _439660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1123, 0), _439660)
   Call: (270) [system] compound('$COMMENT'(";;", 1123, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1123, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1123, 0), _466602, _466604)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1123, 0), '$COMMENT', [";;", 1123, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1123, 0], _470344)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1123, 0], _470344)
   Call: (271) [apply] apply:maplist_([";;", 1123, 0], _470344, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1123, 0], [_473162|_473164], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _473162)
^  Unify: (272) [user] mfix_vars1(";;", _473162)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _473162)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_477808))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _473162)
^  Unify: (272) [user] mfix_vars1(";;", _473162)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _473162)
^  Unify: (272) [user] mfix_vars1(";;", _473162)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _473162)
^  Unify: (272) [user] mfix_vars1(";;", _473162)
   Call: (273) [system] ";;"==[_487088, _487094]
^  Redo: (272) [user] mfix_vars1(";;", _473162)
^  Unify: (272) [user] mfix_vars1(";;", _473162)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _473162)
^  Unify: (272) [user] mfix_vars1(";;", _473162)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _473162)
^  Unify: (272) [user] mfix_vars1(";;", _473162)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _473162)
^  Unify: (272) [user] mfix_vars1(";;", _473162)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _473162)
   Call: (273) [system] ";;"=_473162
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1123, 0], _473164, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1123, 0], [_511160|_511162], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1123, _511160)
^  Unify: (273) [user] mfix_vars1(1123, _511160)
   Call: (274) [system] var(1123)
^  Redo: (273) [user] mfix_vars1(1123, _511160)
^  Unify: (273) [user] mfix_vars1(1123, '$VAR'(_515806))
   Call: (274) [system] atom(1123)
^  Redo: (273) [user] mfix_vars1(1123, _511160)
^  Unify: (273) [user] mfix_vars1(1123, _511160)
   Call: (274) [system] 1123==true
^  Redo: (273) [user] mfix_vars1(1123, _511160)
^  Unify: (273) [user] mfix_vars1(1123, _511160)
   Call: (274) [system] 1123==false
^  Redo: (273) [user] mfix_vars1(1123, _511160)
^  Unify: (273) [user] mfix_vars1(1123, _6028)
   Call: (274) [system] 1123==[_6936, _6942]
^  Redo: (273) [user] mfix_vars1(1123, _6028)
^  Unify: (273) [user] mfix_vars1(1123, _6028)
   Call: (274) [system] is_list(1123)
^  Redo: (273) [user] mfix_vars1(1123, _6028)
^  Unify: (273) [user] mfix_vars1(1123, _6028)
   Call: (274) [system] string(1123)
^  Redo: (273) [user] mfix_vars1(1123, _6028)
^  Unify: (273) [user] mfix_vars1(1123, _6028)
   Call: (274) [system] compound(1123)
^  Redo: (273) [user] mfix_vars1(1123, _6028)
^  Unify: (273) [user] mfix_vars1(1123, _6028)
^  Call: (274) [user] symbol(1123)
^  Unify: (274) [user] symbol(1123)
   Call: (275) [system] atom(1123)
   Fail: (275) [system] atom(1123)
^  Fail: (274) [user] symbol(1123)
^  Redo: (273) [user] mfix_vars1(1123, _6028)
   Call: (274) [system] 1123=_6028
   Exit: (274) [system] 1123=1123
^  Exit: (273) [user] mfix_vars1(1123, 1123)
   Call: (273) [apply] apply:maplist_([0], _6030, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_27336|_27338], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _27336)
^  Unify: (274) [user] mfix_vars1(0, _27336)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _27336)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_31982))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _27336)
^  Unify: (274) [user] mfix_vars1(0, _27336)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _27336)
^  Unify: (274) [user] mfix_vars1(0, _27336)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _27336)
^  Unify: (274) [user] mfix_vars1(0, _27336)
   Call: (275) [system] 0==[_41262, _41268]
^  Redo: (274) [user] mfix_vars1(0, _27336)
^  Unify: (274) [user] mfix_vars1(0, _27336)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _27336)
^  Unify: (274) [user] mfix_vars1(0, _27336)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _27336)
^  Unify: (274) [user] mfix_vars1(0, _27336)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _27336)
^  Unify: (274) [user] mfix_vars1(0, _27336)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _27336)
   Call: (275) [system] 0=_27336
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _27338, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1123, 0], [1123, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1123, 0], [";;", 1123, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1123, 0], [";;", 1123, 0])
   Call: (270) [system] compound_name_arguments(_5976, '$COMMENT', [";;", 1123, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1123, 0), '$COMMENT', [";;", 1123, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1123, 0)\=@='$COMMENT'(";;", 1123, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1123, 0), _5962)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1123, 0), _77510))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1123, 0), _77510))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1123, 0), _77510))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1123, 0), _77510))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1123, 0), _77510)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1123, 0), _77510)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1123, 0), _83096))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1123, 0), _83096))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1123, 0), _83096)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1123, 0), _83096)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1123, 0), _83096)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1123, 0)\=@='$COMMENT'(";;", 1123, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1123, 0), _77510)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1123, 0), _5942))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1123, 0), _5942))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1123, 0), _5942))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1123, 0), _5942))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1123, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1123, 0), _5942)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1123, 0), _105416))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1123, 0), _105416))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1123, 0), _105416)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1123, 0), _105416)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1123, 0), _105416)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1123, 0)\=@='$COMMENT'(";;", 1123, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1123, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1123, 0)\=@='$COMMENT'(";;", 1123, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1123, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1123, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1123, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1123, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1123, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1123, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1123, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1123, 0), _134194, [], _134196)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1123, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1123, 0), _134194, [], _134196)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1123, 0), _134194, [], _134196)
   Call: (258) [system] atom('$COMMENT'(";;", 1123, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1123, 0), _134194, [], _134196)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1123, 0), _134194, [], _134196)
   Call: (258) [system] compound('$COMMENT'(";;", 1123, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1123, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1123, 0), _143510, _143512)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1123, 0), '$COMMENT', [";;", 1123, 0])
^  Call: (258) [user] subst_vars([";;", 1123, 0], _145396, [], _134196)
^  Unify: (258) [user] subst_vars([";;", 1123, 0], [";;", 1123, 0], [], [])
   Call: (259) [system] var([";;", 1123, 0])
^  Redo: (258) [user] subst_vars([";;", 1123, 0], _145396, [], _134196)
^  Unify: (258) [user] subst_vars([";;", 1123, 0], [_149132|_149134], [], _134196)
^  Call: (259) [user] subst_vars(";;", _149132, [], _150072)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _149132, [], _150072)
^  Unify: (259) [user] subst_vars(";;", _149132, [], _150072)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _149132, [], _150072)
^  Unify: (259) [user] subst_vars(";;", _149132, [], _150072)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _149132, [], _150072)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1123, 0], _149134, [], _134196)
^  Unify: (259) [user] subst_vars([1123, 0], [1123, 0], [], [])
   Call: (260) [system] var([1123, 0])
^  Redo: (259) [user] subst_vars([1123, 0], _149134, [], _134196)
^  Unify: (259) [user] subst_vars([1123, 0], [_165004|_165006], [], _134196)
^  Call: (260) [user] subst_vars(1123, _165004, [], _165944)
^  Unify: (260) [user] subst_vars(1123, 1123, [], [])
   Call: (261) [system] var(1123)
^  Redo: (260) [user] subst_vars(1123, _165004, [], _165944)
^  Unify: (260) [user] subst_vars(1123, _165004, [], _165944)
   Call: (261) [system] atom(1123)
^  Redo: (260) [user] subst_vars(1123, _165004, [], _165944)
^  Unify: (260) [user] subst_vars(1123, _165004, [], _165944)
   Call: (261) [system] compound(1123)
^  Redo: (260) [user] subst_vars(1123, _165004, [], _165944)
^  Unify: (260) [user] subst_vars(1123, 1123, [], [])
^  Exit: (260) [user] subst_vars(1123, 1123, [], [])
^  Call: (260) [user] subst_vars([0], _165006, [], _134196)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _165006, [], _134196)
^  Unify: (260) [user] subst_vars([0], [_180876|_180878], [], _134196)
^  Call: (261) [user] subst_vars(0, _180876, [], _181816)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _180876, [], _181816)
^  Unify: (261) [user] subst_vars(0, _180876, [], _181816)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _180876, [], _181816)
^  Unify: (261) [user] subst_vars(0, _180876, [], _181816)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _180876, [], _181816)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _180878, [], _134196)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _180878, [], _134196)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1123, 0], [1123, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1123, 0], [";;", 1123, 0], [], [])
   Call: (258) [system] compound_name_arguments(_134194, '$COMMENT', [";;", 1123, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1123, 0), '$COMMENT', [";;", 1123, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1123, 0), '$COMMENT'(";;", 1123, 0), [], [])
   Call: (257) [system] _204234=metta_file_buffer(+, '$COMMENT'(";;", 1123, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1123, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1123, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1123, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1123, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1123, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1123, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1123, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1123, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1124, 0, 41343, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$stream_position'(41343, 1124, 0, 41343)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _256964))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _256964))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _256964)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _256964)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _256964)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _256964)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _262576))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _262576))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _262576))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _262576))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _262576)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _262576)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _268162))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _268162))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _268162)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _268162)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _268162)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _268162)
   Call: (270) [system] var('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _268162)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$VAR'(_275622))
   Call: (270) [system] atom('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _268162)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _268162)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _268162)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _268162)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _268162)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _268162)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0)==[_284902, _284908]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _268162)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _268162)
   Call: (270) [system] is_list('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _268162)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _268162)
   Call: (270) [system] string('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _268162)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _268162)
   Call: (270) [system] compound('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _295104, _295106)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0], _298846)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0], _298846)
   Call: (271) [apply] apply:maplist_([";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0], _298846, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0], [_301664|_301666], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _301664)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _301664)
   Call: (273) [system] var(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _301664)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", '$VAR'(_306310))
   Call: (273) [system] atom(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _301664)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _301664)
   Call: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program1)),"==true
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _301664)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _301664)
   Call: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program1)),"==false
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _301664)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _301664)
   Call: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program1)),"==[_315590, _315596]
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _301664)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _301664)
   Call: (273) [system] is_list(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _301664)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _301664)
   Call: (273) [system] string(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
   Exit: (273) [system] string(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _301664)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _301664)
   Call: (273) [system] compound(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _301664)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _301664)
^  Call: (273) [user] symbol(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
^  Unify: (273) [user] symbol(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
   Call: (274) [system] atom(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
   Fail: (274) [system] atom(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
^  Fail: (273) [user] symbol(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _301664)
   Call: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program1)),"=_301664
   Exit: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program1)),"=";;     assert_eq!(metta.run(SExprParser::new(program1)),"
^  Exit: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", ";;     assert_eq!(metta.run(SExprParser::new(program1)),")
   Call: (272) [apply] apply:maplist_([1124, 0], _301666, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1124, 0], [_339662|_339664], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1124, _339662)
^  Unify: (273) [user] mfix_vars1(1124, _339662)
   Call: (274) [system] var(1124)
^  Redo: (273) [user] mfix_vars1(1124, _339662)
^  Unify: (273) [user] mfix_vars1(1124, '$VAR'(_344308))
   Call: (274) [system] atom(1124)
^  Redo: (273) [user] mfix_vars1(1124, _339662)
^  Unify: (273) [user] mfix_vars1(1124, _339662)
   Call: (274) [system] 1124==true
^  Redo: (273) [user] mfix_vars1(1124, _339662)
^  Unify: (273) [user] mfix_vars1(1124, _339662)
   Call: (274) [system] 1124==false
^  Redo: (273) [user] mfix_vars1(1124, _339662)
^  Unify: (273) [user] mfix_vars1(1124, _339662)
   Call: (274) [system] 1124==[_353588, _353594]
^  Redo: (273) [user] mfix_vars1(1124, _339662)
^  Unify: (273) [user] mfix_vars1(1124, _339662)
   Call: (274) [system] is_list(1124)
^  Redo: (273) [user] mfix_vars1(1124, _339662)
^  Unify: (273) [user] mfix_vars1(1124, _339662)
   Call: (274) [system] string(1124)
^  Redo: (273) [user] mfix_vars1(1124, _339662)
^  Unify: (273) [user] mfix_vars1(1124, _339662)
   Call: (274) [system] compound(1124)
^  Redo: (273) [user] mfix_vars1(1124, _339662)
^  Unify: (273) [user] mfix_vars1(1124, _339662)
^  Call: (274) [user] symbol(1124)
^  Unify: (274) [user] symbol(1124)
   Call: (275) [system] atom(1124)
   Fail: (275) [system] atom(1124)
^  Fail: (274) [user] symbol(1124)
^  Redo: (273) [user] mfix_vars1(1124, _339662)
   Call: (274) [system] 1124=_339662
   Exit: (274) [system] 1124=1124
^  Exit: (273) [user] mfix_vars1(1124, 1124)
   Call: (273) [apply] apply:maplist_([0], _339664, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_373988|_373990], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _373988)
^  Unify: (274) [user] mfix_vars1(0, _373988)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _373988)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_378634))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _373988)
^  Unify: (274) [user] mfix_vars1(0, _373988)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _373988)
^  Unify: (274) [user] mfix_vars1(0, _373988)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _373988)
^  Unify: (274) [user] mfix_vars1(0, _373988)
   Call: (275) [system] 0==[_387914, _387920]
^  Redo: (274) [user] mfix_vars1(0, _373988)
^  Unify: (274) [user] mfix_vars1(0, _373988)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _373988)
^  Unify: (274) [user] mfix_vars1(0, _373988)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _373988)
^  Unify: (274) [user] mfix_vars1(0, _373988)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _373988)
^  Unify: (274) [user] mfix_vars1(0, _373988)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _373988)
   Call: (275) [system] 0=_373988
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _373990, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1124, 0], [1124, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0], [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0], [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0])
   Call: (270) [system] compound_name_arguments(_268162, '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0)\=@='$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _262576)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _424162))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _424162))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _424162))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _424162))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _424162)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _424162)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _429748))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _429748))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _429748)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _429748)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _429748)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0)\=@='$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _424162)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _256964))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _256964))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _256964))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _256964))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _256964)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _256964)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _452068))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _452068))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _452068)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _452068)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _452068)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0)\=@='$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _256964)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0)))
   Call: (261) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0)\=@='$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _480846, [], _480848)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _480846, [], _480848)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _480846, [], _480848)
   Call: (258) [system] atom('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _480846, [], _480848)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _480846, [], _480848)
   Call: (258) [system] compound('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), _490162, _490164)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0])
^  Call: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0], _492048, [], _480848)
^  Unify: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0], [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0], [], [])
   Call: (259) [system] var([";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0])
^  Redo: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0], _492048, [], _480848)
^  Unify: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0], [_495784|_495786], [], _480848)
^  Call: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _495784, [], _496724)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program1)),", ";;     assert_eq!(metta.run(SExprParser::new(program1)),", [], [])
   Call: (260) [system] var(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _495784, [], _496724)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _495784, [], _496724)
   Call: (260) [system] atom(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _495784, [], _496724)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _495784, [], _496724)
   Call: (260) [system] compound(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _495784, [], _496724)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program1)),", ";;     assert_eq!(metta.run(SExprParser::new(program1)),", [], [])
^  Exit: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program1)),", ";;     assert_eq!(metta.run(SExprParser::new(program1)),", [], [])
^  Call: (259) [user] subst_vars([1124, 0], _495786, [], _480848)
^  Unify: (259) [user] subst_vars([1124, 0], [1124, 0], [], [])
   Call: (260) [system] var([1124, 0])
^  Redo: (259) [user] subst_vars([1124, 0], _495786, [], _480848)
^  Unify: (259) [user] subst_vars([1124, 0], [_511656|_511658], [], _480848)
^  Call: (260) [user] subst_vars(1124, _511656, [], _512596)
^  Unify: (260) [user] subst_vars(1124, 1124, [], [])
   Call: (261) [system] var(1124)
^  Redo: (260) [user] subst_vars(1124, _511656, [], _512596)
^  Unify: (260) [user] subst_vars(1124, _511656, [], _512596)
   Call: (261) [system] atom(1124)
^  Redo: (260) [user] subst_vars(1124, _511656, [], _512596)
^  Unify: (260) [user] subst_vars(1124, _511656, [], _512596)
   Call: (261) [system] compound(1124)
^  Redo: (260) [user] subst_vars(1124, _511656, [], _512596)
^  Unify: (260) [user] subst_vars(1124, 1124, [], [])
^  Exit: (260) [user] subst_vars(1124, 1124, [], [])
^  Call: (260) [user] subst_vars([0], _5990, [], _5952)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _5990, [], _5952)
^  Unify: (260) [user] subst_vars([0], [_9544|_9546], [], _5952)
^  Call: (261) [user] subst_vars(0, _9544, [], _10484)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _9544, [], _10484)
^  Unify: (261) [user] subst_vars(0, _9544, [], _10484)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _9544, [], _10484)
^  Unify: (261) [user] subst_vars(0, _9544, [], _10484)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _9544, [], _10484)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _9546, [], _5952)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _9546, [], _5952)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1124, 0], [1124, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0], [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5950, '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), [], [])
   Call: (257) [system] _32902=metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1124, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1125, 0, 41400, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$stream_position'(41400, 1125, 0, 41400)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _85632))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _85632))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _85632)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _85632)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _85632)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _85632)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _91244))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _91244))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _91244))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _91244))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _91244)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _91244)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _96830))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _96830))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _96830)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _96830)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _96830)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _96830)
   Call: (270) [system] var('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _96830)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$VAR'(_104290))
   Call: (270) [system] atom('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _96830)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _96830)
   Call: (270) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _96830)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _96830)
   Call: (270) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _96830)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _96830)
   Call: (270) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0)==[_113570, _113576]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _96830)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _96830)
   Call: (270) [system] is_list('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _96830)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _96830)
   Call: (270) [system] string('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _96830)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _96830)
   Call: (270) [system] compound('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _123772, _123774)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0], _127514)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0], _127514)
   Call: (271) [apply] apply:maplist_([";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0], _127514, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0], [_130332|_130334], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _130332)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _130332)
   Call: (273) [system] var(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _130332)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", '$VAR'(_134978))
   Call: (273) [system] atom(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _130332)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _130332)
   Call: (273) [system] ";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));"==true
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _130332)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _130332)
   Call: (273) [system] ";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));"==false
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _130332)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _130332)
   Call: (273) [system] ";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));"==[_144258, _144264]
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _130332)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _130332)
   Call: (273) [system] is_list(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _130332)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _130332)
   Call: (273) [system] string(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
   Exit: (273) [system] string(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _130332)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _130332)
   Call: (273) [system] compound(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _130332)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _130332)
^  Call: (273) [user] symbol(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
^  Unify: (273) [user] symbol(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
   Call: (274) [system] atom(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
   Fail: (274) [system] atom(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
^  Fail: (273) [user] symbol(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _130332)
   Call: (273) [system] ";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));"=_130332
   Exit: (273) [system] ";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));"=";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));"
^  Exit: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", ";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
   Call: (272) [apply] apply:maplist_([1125, 0], _130334, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1125, 0], [_168330|_168332], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1125, _168330)
^  Unify: (273) [user] mfix_vars1(1125, _168330)
   Call: (274) [system] var(1125)
^  Redo: (273) [user] mfix_vars1(1125, _168330)
^  Unify: (273) [user] mfix_vars1(1125, '$VAR'(_172976))
   Call: (274) [system] atom(1125)
^  Redo: (273) [user] mfix_vars1(1125, _168330)
^  Unify: (273) [user] mfix_vars1(1125, _168330)
   Call: (274) [system] 1125==true
^  Redo: (273) [user] mfix_vars1(1125, _168330)
^  Unify: (273) [user] mfix_vars1(1125, _168330)
   Call: (274) [system] 1125==false
^  Redo: (273) [user] mfix_vars1(1125, _168330)
^  Unify: (273) [user] mfix_vars1(1125, _168330)
   Call: (274) [system] 1125==[_182256, _182262]
^  Redo: (273) [user] mfix_vars1(1125, _168330)
^  Unify: (273) [user] mfix_vars1(1125, _168330)
   Call: (274) [system] is_list(1125)
^  Redo: (273) [user] mfix_vars1(1125, _168330)
^  Unify: (273) [user] mfix_vars1(1125, _168330)
   Call: (274) [system] string(1125)
^  Redo: (273) [user] mfix_vars1(1125, _168330)
^  Unify: (273) [user] mfix_vars1(1125, _168330)
   Call: (274) [system] compound(1125)
^  Redo: (273) [user] mfix_vars1(1125, _168330)
^  Unify: (273) [user] mfix_vars1(1125, _168330)
^  Call: (274) [user] symbol(1125)
^  Unify: (274) [user] symbol(1125)
   Call: (275) [system] atom(1125)
   Fail: (275) [system] atom(1125)
^  Fail: (274) [user] symbol(1125)
^  Redo: (273) [user] mfix_vars1(1125, _168330)
   Call: (274) [system] 1125=_168330
   Exit: (274) [system] 1125=1125
^  Exit: (273) [user] mfix_vars1(1125, 1125)
   Call: (273) [apply] apply:maplist_([0], _168332, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_202656|_202658], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _202656)
^  Unify: (274) [user] mfix_vars1(0, _202656)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _202656)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_207302))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _202656)
^  Unify: (274) [user] mfix_vars1(0, _202656)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _202656)
^  Unify: (274) [user] mfix_vars1(0, _202656)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _202656)
^  Unify: (274) [user] mfix_vars1(0, _202656)
   Call: (275) [system] 0==[_216582, _216588]
^  Redo: (274) [user] mfix_vars1(0, _202656)
^  Unify: (274) [user] mfix_vars1(0, _202656)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _202656)
^  Unify: (274) [user] mfix_vars1(0, _202656)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _202656)
^  Unify: (274) [user] mfix_vars1(0, _202656)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _202656)
^  Unify: (274) [user] mfix_vars1(0, _202656)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _202656)
   Call: (275) [system] 0=_202656
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _202658, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1125, 0], [1125, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0], [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0], [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0])
   Call: (270) [system] compound_name_arguments(_96830, '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0)))
   Call: (267) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0)\=@='$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _91244)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _252830))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _252830))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _252830))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _252830))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _252830)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _252830)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _258416))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _258416))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _258416)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _258416)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _258416)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0)))
   Call: (267) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0)\=@='$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _252830)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _85632))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _85632))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _85632))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _85632))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _85632)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _85632)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _280736))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _280736))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _280736)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _280736)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _280736)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0)))
   Call: (267) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0)\=@='$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _85632)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0)))
   Call: (261) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0)\=@='$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _309514, [], _309516)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _309514, [], _309516)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _309514, [], _309516)
   Call: (258) [system] atom('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _309514, [], _309516)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _309514, [], _309516)
   Call: (258) [system] compound('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), _318830, _318832)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0])
^  Call: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0], _320716, [], _309516)
^  Unify: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0], [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0], [], [])
   Call: (259) [system] var([";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0])
^  Redo: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0], _320716, [], _309516)
^  Unify: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0], [_324452|_324454], [], _309516)
^  Call: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _324452, [], _325392)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", ";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", [], [])
   Call: (260) [system] var(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
^  Redo: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _324452, [], _325392)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _324452, [], _325392)
   Call: (260) [system] atom(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
^  Redo: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _324452, [], _325392)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _324452, [], _325392)
   Call: (260) [system] compound(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
^  Redo: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _324452, [], _325392)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", ";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", [], [])
^  Exit: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", ";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", [], [])
^  Call: (259) [user] subst_vars([1125, 0], _324454, [], _309516)
^  Unify: (259) [user] subst_vars([1125, 0], [1125, 0], [], [])
   Call: (260) [system] var([1125, 0])
^  Redo: (259) [user] subst_vars([1125, 0], _324454, [], _309516)
^  Unify: (259) [user] subst_vars([1125, 0], [_340324|_340326], [], _309516)
^  Call: (260) [user] subst_vars(1125, _340324, [], _341264)
^  Unify: (260) [user] subst_vars(1125, 1125, [], [])
   Call: (261) [system] var(1125)
^  Redo: (260) [user] subst_vars(1125, _340324, [], _341264)
^  Unify: (260) [user] subst_vars(1125, _340324, [], _341264)
   Call: (261) [system] atom(1125)
^  Redo: (260) [user] subst_vars(1125, _340324, [], _341264)
^  Unify: (260) [user] subst_vars(1125, _340324, [], _341264)
   Call: (261) [system] compound(1125)
^  Redo: (260) [user] subst_vars(1125, _340324, [], _341264)
^  Unify: (260) [user] subst_vars(1125, 1125, [], [])
^  Exit: (260) [user] subst_vars(1125, 1125, [], [])
^  Call: (260) [user] subst_vars([0], _340326, [], _309516)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _340326, [], _309516)
^  Unify: (260) [user] subst_vars([0], [_356196|_356198], [], _309516)
^  Call: (261) [user] subst_vars(0, _356196, [], _357136)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _356196, [], _357136)
^  Unify: (261) [user] subst_vars(0, _356196, [], _357136)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _356196, [], _357136)
^  Unify: (261) [user] subst_vars(0, _356196, [], _357136)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _356196, [], _357136)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _356198, [], _309516)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _356198, [], _309516)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1125, 0], [1125, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0], [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0], [], [])
   Call: (258) [system] compound_name_arguments(_309514, '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), [], [])
   Call: (257) [system] _379554=metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1125, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1126, 0, 41463, '$COMMENT'(";;", 1126, 0), '$stream_position'(41463, 1126, 0, 41463)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1126, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1126, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1126, 0), _432270))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1126, 0), _432270))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1126, 0), _432270)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1126, 0), _432270)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1126, 0), _432270)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1126, 0), _432270)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1126, 0), _437882))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1126, 0), _437882))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1126, 0), _437882))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1126, 0), _437882))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1126, 0), _437882)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1126, 0), _437882)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1126, 0), _443468))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1126, 0), _443468))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1126, 0), _443468)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1126, 0), _443468)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1126, 0), _443468)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1126, 0), _443468)
   Call: (270) [system] var('$COMMENT'(";;", 1126, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1126, 0), _443468)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1126, 0), '$VAR'(_450928))
   Call: (270) [system] atom('$COMMENT'(";;", 1126, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1126, 0), _443468)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1126, 0), _443468)
   Call: (270) [system] '$COMMENT'(";;", 1126, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1126, 0), _443468)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1126, 0), _443468)
   Call: (270) [system] '$COMMENT'(";;", 1126, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1126, 0), _443468)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1126, 0), _443468)
   Call: (270) [system] '$COMMENT'(";;", 1126, 0)==[_460208, _460214]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1126, 0), _443468)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1126, 0), _443468)
   Call: (270) [system] is_list('$COMMENT'(";;", 1126, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1126, 0), _443468)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1126, 0), _443468)
   Call: (270) [system] string('$COMMENT'(";;", 1126, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1126, 0), _443468)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1126, 0), _443468)
   Call: (270) [system] compound('$COMMENT'(";;", 1126, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1126, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1126, 0), _470410, _470412)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1126, 0), '$COMMENT', [";;", 1126, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1126, 0], _474152)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1126, 0], _474152)
   Call: (271) [apply] apply:maplist_([";;", 1126, 0], _474152, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1126, 0], [_476970|_476972], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _476970)
^  Unify: (272) [user] mfix_vars1(";;", _476970)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _476970)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_481616))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _476970)
^  Unify: (272) [user] mfix_vars1(";;", _476970)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _476970)
^  Unify: (272) [user] mfix_vars1(";;", _476970)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _476970)
^  Unify: (272) [user] mfix_vars1(";;", _476970)
   Call: (273) [system] ";;"==[_490896, _490902]
^  Redo: (272) [user] mfix_vars1(";;", _476970)
^  Unify: (272) [user] mfix_vars1(";;", _476970)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _476970)
^  Unify: (272) [user] mfix_vars1(";;", _476970)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _476970)
^  Unify: (272) [user] mfix_vars1(";;", _476970)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _476970)
^  Unify: (272) [user] mfix_vars1(";;", _476970)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _476970)
   Call: (273) [system] ";;"=_476970
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1126, 0], _476972, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1126, 0], [_514968|_514970], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1126, _514968)
^  Unify: (273) [user] mfix_vars1(1126, _514968)
   Call: (274) [system] var(1126)
^  Redo: (273) [user] mfix_vars1(1126, _514968)
^  Unify: (273) [user] mfix_vars1(1126, '$VAR'(_519614))
   Call: (274) [system] atom(1126)
^  Redo: (273) [user] mfix_vars1(1126, _514968)
^  Unify: (273) [user] mfix_vars1(1126, _514968)
   Call: (274) [system] 1126==true
^  Redo: (273) [user] mfix_vars1(1126, _6028)
^  Unify: (273) [user] mfix_vars1(1126, _6028)
   Call: (274) [system] 1126==false
^  Redo: (273) [user] mfix_vars1(1126, _6028)
^  Unify: (273) [user] mfix_vars1(1126, _6028)
   Call: (274) [system] 1126==[_11026, _11032]
^  Redo: (273) [user] mfix_vars1(1126, _6028)
^  Unify: (273) [user] mfix_vars1(1126, _6028)
   Call: (274) [system] is_list(1126)
^  Redo: (273) [user] mfix_vars1(1126, _6028)
^  Unify: (273) [user] mfix_vars1(1126, _6028)
   Call: (274) [system] string(1126)
^  Redo: (273) [user] mfix_vars1(1126, _6028)
^  Unify: (273) [user] mfix_vars1(1126, _6028)
   Call: (274) [system] compound(1126)
^  Redo: (273) [user] mfix_vars1(1126, _6028)
^  Unify: (273) [user] mfix_vars1(1126, _6028)
^  Call: (274) [user] symbol(1126)
^  Unify: (274) [user] symbol(1126)
   Call: (275) [system] atom(1126)
   Fail: (275) [system] atom(1126)
^  Fail: (274) [user] symbol(1126)
^  Redo: (273) [user] mfix_vars1(1126, _6028)
   Call: (274) [system] 1126=_6028
   Exit: (274) [system] 1126=1126
^  Exit: (273) [user] mfix_vars1(1126, 1126)
   Call: (273) [apply] apply:maplist_([0], _6030, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_31426|_31428], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _31426)
^  Unify: (274) [user] mfix_vars1(0, _31426)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _31426)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_36072))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _31426)
^  Unify: (274) [user] mfix_vars1(0, _31426)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _31426)
^  Unify: (274) [user] mfix_vars1(0, _31426)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _31426)
^  Unify: (274) [user] mfix_vars1(0, _31426)
   Call: (275) [system] 0==[_45352, _45358]
^  Redo: (274) [user] mfix_vars1(0, _31426)
^  Unify: (274) [user] mfix_vars1(0, _31426)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _31426)
^  Unify: (274) [user] mfix_vars1(0, _31426)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _31426)
^  Unify: (274) [user] mfix_vars1(0, _31426)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _31426)
^  Unify: (274) [user] mfix_vars1(0, _31426)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _31426)
   Call: (275) [system] 0=_31426
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _31428, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1126, 0], [1126, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1126, 0], [";;", 1126, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1126, 0], [";;", 1126, 0])
   Call: (270) [system] compound_name_arguments(_5976, '$COMMENT', [";;", 1126, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1126, 0), '$COMMENT', [";;", 1126, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1126, 0)\=@='$COMMENT'(";;", 1126, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1126, 0), _5962)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1126, 0), _81600))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1126, 0), _81600))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1126, 0), _81600))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1126, 0), _81600))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1126, 0), _81600)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1126, 0), _81600)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1126, 0), _87186))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1126, 0), _87186))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1126, 0), _87186)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1126, 0), _87186)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1126, 0), _87186)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1126, 0)\=@='$COMMENT'(";;", 1126, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1126, 0), _81600)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1126, 0), _5942))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1126, 0), _5942))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1126, 0), _5942))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1126, 0), _5942))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1126, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1126, 0), _5942)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1126, 0), _109506))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1126, 0), _109506))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1126, 0), _109506)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1126, 0), _109506)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1126, 0), _109506)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1126, 0)\=@='$COMMENT'(";;", 1126, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1126, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1126, 0)\=@='$COMMENT'(";;", 1126, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1126, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1126, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1126, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1126, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1126, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1126, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1126, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1126, 0), _138284, [], _138286)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1126, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1126, 0), _138284, [], _138286)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1126, 0), _138284, [], _138286)
   Call: (258) [system] atom('$COMMENT'(";;", 1126, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1126, 0), _138284, [], _138286)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1126, 0), _138284, [], _138286)
   Call: (258) [system] compound('$COMMENT'(";;", 1126, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1126, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1126, 0), _147600, _147602)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1126, 0), '$COMMENT', [";;", 1126, 0])
^  Call: (258) [user] subst_vars([";;", 1126, 0], _149486, [], _138286)
^  Unify: (258) [user] subst_vars([";;", 1126, 0], [";;", 1126, 0], [], [])
   Call: (259) [system] var([";;", 1126, 0])
^  Redo: (258) [user] subst_vars([";;", 1126, 0], _149486, [], _138286)
^  Unify: (258) [user] subst_vars([";;", 1126, 0], [_153222|_153224], [], _138286)
^  Call: (259) [user] subst_vars(";;", _153222, [], _154162)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _153222, [], _154162)
^  Unify: (259) [user] subst_vars(";;", _153222, [], _154162)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _153222, [], _154162)
^  Unify: (259) [user] subst_vars(";;", _153222, [], _154162)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _153222, [], _154162)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1126, 0], _153224, [], _138286)
^  Unify: (259) [user] subst_vars([1126, 0], [1126, 0], [], [])
   Call: (260) [system] var([1126, 0])
^  Redo: (259) [user] subst_vars([1126, 0], _153224, [], _138286)
^  Unify: (259) [user] subst_vars([1126, 0], [_169094|_169096], [], _138286)
^  Call: (260) [user] subst_vars(1126, _169094, [], _170034)
^  Unify: (260) [user] subst_vars(1126, 1126, [], [])
   Call: (261) [system] var(1126)
^  Redo: (260) [user] subst_vars(1126, _169094, [], _170034)
^  Unify: (260) [user] subst_vars(1126, _169094, [], _170034)
   Call: (261) [system] atom(1126)
^  Redo: (260) [user] subst_vars(1126, _169094, [], _170034)
^  Unify: (260) [user] subst_vars(1126, _169094, [], _170034)
   Call: (261) [system] compound(1126)
^  Redo: (260) [user] subst_vars(1126, _169094, [], _170034)
^  Unify: (260) [user] subst_vars(1126, 1126, [], [])
^  Exit: (260) [user] subst_vars(1126, 1126, [], [])
^  Call: (260) [user] subst_vars([0], _169096, [], _138286)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _169096, [], _138286)
^  Unify: (260) [user] subst_vars([0], [_184966|_184968], [], _138286)
^  Call: (261) [user] subst_vars(0, _184966, [], _185906)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _184966, [], _185906)
^  Unify: (261) [user] subst_vars(0, _184966, [], _185906)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _184966, [], _185906)
^  Unify: (261) [user] subst_vars(0, _184966, [], _185906)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _184966, [], _185906)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _184968, [], _138286)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _184968, [], _138286)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1126, 0], [1126, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1126, 0], [";;", 1126, 0], [], [])
   Call: (258) [system] compound_name_arguments(_138284, '$COMMENT', [";;", 1126, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1126, 0), '$COMMENT', [";;", 1126, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1126, 0), '$COMMENT'(";;", 1126, 0), [], [])
   Call: (257) [system] _208324=metta_file_buffer(+, '$COMMENT'(";;", 1126, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1126, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1126, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1126, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1126, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1126, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1126, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1126, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1126, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1127, 0, 41466, '$COMMENT'(";;     let program2 = \"", 1127, 0), '$stream_position'(41466, 1127, 0, 41466)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program2 = \"", 1127, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program2 = \"", 1127, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     let program2 = \"", 1127, 0), _261046))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let program2 = \"", 1127, 0), _261046))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     let program2 = \"", 1127, 0), _261046)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let program2 = \"", 1127, 0), _261046)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     let program2 = \"", 1127, 0), _261046)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     let program2 = \"", 1127, 0), _261046)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     let program2 = \"", 1127, 0), _266658))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let program2 = \"", 1127, 0), _266658))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     let program2 = \"", 1127, 0), _266658))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let program2 = \"", 1127, 0), _266658))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program2 = \"", 1127, 0), _266658)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program2 = \"", 1127, 0), _266658)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     let program2 = \"", 1127, 0), _272244))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let program2 = \"", 1127, 0), _272244))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     let program2 = \"", 1127, 0), _272244)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let program2 = \"", 1127, 0), _272244)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"", 1127, 0), _272244)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"", 1127, 0), _272244)
   Call: (270) [system] var('$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"", 1127, 0), _272244)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"", 1127, 0), '$VAR'(_279704))
   Call: (270) [system] atom('$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"", 1127, 0), _272244)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"", 1127, 0), _272244)
   Call: (270) [system] '$COMMENT'(";;     let program2 = \"", 1127, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"", 1127, 0), _272244)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"", 1127, 0), _272244)
   Call: (270) [system] '$COMMENT'(";;     let program2 = \"", 1127, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"", 1127, 0), _272244)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"", 1127, 0), _272244)
   Call: (270) [system] '$COMMENT'(";;     let program2 = \"", 1127, 0)==[_288984, _288990]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"", 1127, 0), _272244)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"", 1127, 0), _272244)
   Call: (270) [system] is_list('$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"", 1127, 0), _272244)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"", 1127, 0), _272244)
   Call: (270) [system] string('$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"", 1127, 0), _272244)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"", 1127, 0), _272244)
   Call: (270) [system] compound('$COMMENT'(";;     let program2 = \"", 1127, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     let program2 = \"", 1127, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     let program2 = \"", 1127, 0), _299186, _299188)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT', [";;     let program2 = \"", 1127, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     let program2 = \"", 1127, 0], _302928)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let program2 = \"", 1127, 0], _302928)
   Call: (271) [apply] apply:maplist_([";;     let program2 = \"", 1127, 0], _302928, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     let program2 = \"", 1127, 0], [_305746|_305748], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     let program2 = \"", _305746)
^  Unify: (272) [user] mfix_vars1(";;     let program2 = \"", _305746)
   Call: (273) [system] var(";;     let program2 = \"")
^  Redo: (272) [user] mfix_vars1(";;     let program2 = \"", _305746)
^  Unify: (272) [user] mfix_vars1(";;     let program2 = \"", '$VAR'(_310392))
   Call: (273) [system] atom(";;     let program2 = \"")
^  Redo: (272) [user] mfix_vars1(";;     let program2 = \"", _305746)
^  Unify: (272) [user] mfix_vars1(";;     let program2 = \"", _305746)
   Call: (273) [system] ";;     let program2 = \""==true
^  Redo: (272) [user] mfix_vars1(";;     let program2 = \"", _305746)
^  Unify: (272) [user] mfix_vars1(";;     let program2 = \"", _305746)
   Call: (273) [system] ";;     let program2 = \""==false
^  Redo: (272) [user] mfix_vars1(";;     let program2 = \"", _305746)
^  Unify: (272) [user] mfix_vars1(";;     let program2 = \"", _305746)
   Call: (273) [system] ";;     let program2 = \""==[_319672, _319678]
^  Redo: (272) [user] mfix_vars1(";;     let program2 = \"", _305746)
^  Unify: (272) [user] mfix_vars1(";;     let program2 = \"", _305746)
   Call: (273) [system] is_list(";;     let program2 = \"")
^  Redo: (272) [user] mfix_vars1(";;     let program2 = \"", _305746)
^  Unify: (272) [user] mfix_vars1(";;     let program2 = \"", _305746)
   Call: (273) [system] string(";;     let program2 = \"")
   Exit: (273) [system] string(";;     let program2 = \"")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     let program2 = \"", _305746)
^  Unify: (272) [user] mfix_vars1(";;     let program2 = \"", _305746)
   Call: (273) [system] compound(";;     let program2 = \"")
^  Redo: (272) [user] mfix_vars1(";;     let program2 = \"", _305746)
^  Unify: (272) [user] mfix_vars1(";;     let program2 = \"", _305746)
^  Call: (273) [user] symbol(";;     let program2 = \"")
^  Unify: (273) [user] symbol(";;     let program2 = \"")
   Call: (274) [system] atom(";;     let program2 = \"")
   Fail: (274) [system] atom(";;     let program2 = \"")
^  Fail: (273) [user] symbol(";;     let program2 = \"")
^  Redo: (272) [user] mfix_vars1(";;     let program2 = \"", _305746)
   Call: (273) [system] ";;     let program2 = \""=_305746
   Exit: (273) [system] ";;     let program2 = \""=";;     let program2 = \""
^  Exit: (272) [user] mfix_vars1(";;     let program2 = \"", ";;     let program2 = \"")
   Call: (272) [apply] apply:maplist_([1127, 0], _305748, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1127, 0], [_343744|_343746], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1127, _343744)
^  Unify: (273) [user] mfix_vars1(1127, _343744)
   Call: (274) [system] var(1127)
^  Redo: (273) [user] mfix_vars1(1127, _343744)
^  Unify: (273) [user] mfix_vars1(1127, '$VAR'(_348390))
   Call: (274) [system] atom(1127)
^  Redo: (273) [user] mfix_vars1(1127, _343744)
^  Unify: (273) [user] mfix_vars1(1127, _343744)
   Call: (274) [system] 1127==true
^  Redo: (273) [user] mfix_vars1(1127, _343744)
^  Unify: (273) [user] mfix_vars1(1127, _343744)
   Call: (274) [system] 1127==false
^  Redo: (273) [user] mfix_vars1(1127, _343744)
^  Unify: (273) [user] mfix_vars1(1127, _343744)
   Call: (274) [system] 1127==[_357670, _357676]
^  Redo: (273) [user] mfix_vars1(1127, _343744)
^  Unify: (273) [user] mfix_vars1(1127, _343744)
   Call: (274) [system] is_list(1127)
^  Redo: (273) [user] mfix_vars1(1127, _343744)
^  Unify: (273) [user] mfix_vars1(1127, _343744)
   Call: (274) [system] string(1127)
^  Redo: (273) [user] mfix_vars1(1127, _343744)
^  Unify: (273) [user] mfix_vars1(1127, _343744)
   Call: (274) [system] compound(1127)
^  Redo: (273) [user] mfix_vars1(1127, _343744)
^  Unify: (273) [user] mfix_vars1(1127, _343744)
^  Call: (274) [user] symbol(1127)
^  Unify: (274) [user] symbol(1127)
   Call: (275) [system] atom(1127)
   Fail: (275) [system] atom(1127)
^  Fail: (274) [user] symbol(1127)
^  Redo: (273) [user] mfix_vars1(1127, _343744)
   Call: (274) [system] 1127=_343744
   Exit: (274) [system] 1127=1127
^  Exit: (273) [user] mfix_vars1(1127, 1127)
   Call: (273) [apply] apply:maplist_([0], _343746, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_378070|_378072], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _378070)
^  Unify: (274) [user] mfix_vars1(0, _378070)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _378070)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_382716))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _378070)
^  Unify: (274) [user] mfix_vars1(0, _378070)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _378070)
^  Unify: (274) [user] mfix_vars1(0, _378070)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _378070)
^  Unify: (274) [user] mfix_vars1(0, _378070)
   Call: (275) [system] 0==[_391996, _392002]
^  Redo: (274) [user] mfix_vars1(0, _378070)
^  Unify: (274) [user] mfix_vars1(0, _378070)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _378070)
^  Unify: (274) [user] mfix_vars1(0, _378070)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _378070)
^  Unify: (274) [user] mfix_vars1(0, _378070)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _378070)
^  Unify: (274) [user] mfix_vars1(0, _378070)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _378070)
   Call: (275) [system] 0=_378070
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _378072, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1127, 0], [1127, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     let program2 = \"", 1127, 0], [";;     let program2 = \"", 1127, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let program2 = \"", 1127, 0], [";;     let program2 = \"", 1127, 0])
   Call: (270) [system] compound_name_arguments(_272244, '$COMMENT', [";;     let program2 = \"", 1127, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT', [";;     let program2 = \"", 1127, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0)))
   Call: (267) [system] '$COMMENT'(";;     let program2 = \"", 1127, 0)\=@='$COMMENT'(";;     let program2 = \"", 1127, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program2 = \"", 1127, 0), _266658)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     let program2 = \"", 1127, 0), _428244))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let program2 = \"", 1127, 0), _428244))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     let program2 = \"", 1127, 0), _428244))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let program2 = \"", 1127, 0), _428244))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program2 = \"", 1127, 0), _428244)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program2 = \"", 1127, 0), _428244)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     let program2 = \"", 1127, 0), _433830))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let program2 = \"", 1127, 0), _433830))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     let program2 = \"", 1127, 0), _433830)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let program2 = \"", 1127, 0), _433830)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     let program2 = \"", 1127, 0), _433830)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0)))
   Call: (267) [system] '$COMMENT'(";;     let program2 = \"", 1127, 0)\=@='$COMMENT'(";;     let program2 = \"", 1127, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program2 = \"", 1127, 0), _428244)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     let program2 = \"", 1127, 0), _261046))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let program2 = \"", 1127, 0), _261046))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     let program2 = \"", 1127, 0), _261046))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let program2 = \"", 1127, 0), _261046))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program2 = \"", 1127, 0), _261046)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program2 = \"", 1127, 0), _261046)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     let program2 = \"", 1127, 0), _456150))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let program2 = \"", 1127, 0), _456150))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     let program2 = \"", 1127, 0), _456150)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let program2 = \"", 1127, 0), _456150)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     let program2 = \"", 1127, 0), _456150)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0)))
   Call: (267) [system] '$COMMENT'(";;     let program2 = \"", 1127, 0)\=@='$COMMENT'(";;     let program2 = \"", 1127, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program2 = \"", 1127, 0), _261046)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0)))
   Call: (261) [system] '$COMMENT'(";;     let program2 = \"", 1127, 0)\=@='$COMMENT'(";;     let program2 = \"", 1127, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program2 = \"", 1127, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program2 = \"", 1127, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program2 = \"", 1127, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program2 = \"", 1127, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program2 = \"", 1127, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     let program2 = \"", 1127, 0), _484928, [], _484930)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let program2 = \"", 1127, 0), _484928, [], _484930)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let program2 = \"", 1127, 0), _484928, [], _484930)
   Call: (258) [system] atom('$COMMENT'(";;     let program2 = \"", 1127, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let program2 = \"", 1127, 0), _484928, [], _484930)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let program2 = \"", 1127, 0), _484928, [], _484930)
   Call: (258) [system] compound('$COMMENT'(";;     let program2 = \"", 1127, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     let program2 = \"", 1127, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     let program2 = \"", 1127, 0), _494244, _494246)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT', [";;     let program2 = \"", 1127, 0])
^  Call: (258) [user] subst_vars([";;     let program2 = \"", 1127, 0], _496130, [], _484930)
^  Unify: (258) [user] subst_vars([";;     let program2 = \"", 1127, 0], [";;     let program2 = \"", 1127, 0], [], [])
   Call: (259) [system] var([";;     let program2 = \"", 1127, 0])
^  Redo: (258) [user] subst_vars([";;     let program2 = \"", 1127, 0], _496130, [], _484930)
^  Unify: (258) [user] subst_vars([";;     let program2 = \"", 1127, 0], [_499866|_499868], [], _484930)
^  Call: (259) [user] subst_vars(";;     let program2 = \"", _499866, [], _500806)
^  Unify: (259) [user] subst_vars(";;     let program2 = \"", ";;     let program2 = \"", [], [])
   Call: (260) [system] var(";;     let program2 = \"")
^  Redo: (259) [user] subst_vars(";;     let program2 = \"", _499866, [], _500806)
^  Unify: (259) [user] subst_vars(";;     let program2 = \"", _499866, [], _500806)
   Call: (260) [system] atom(";;     let program2 = \"")
^  Redo: (259) [user] subst_vars(";;     let program2 = \"", _499866, [], _500806)
^  Unify: (259) [user] subst_vars(";;     let program2 = \"", _499866, [], _500806)
   Call: (260) [system] compound(";;     let program2 = \"")
^  Redo: (259) [user] subst_vars(";;     let program2 = \"", _499866, [], _500806)
^  Unify: (259) [user] subst_vars(";;     let program2 = \"", ";;     let program2 = \"", [], [])
^  Exit: (259) [user] subst_vars(";;     let program2 = \"", ";;     let program2 = \"", [], [])
^  Call: (259) [user] subst_vars([1127, 0], _499868, [], _484930)
^  Unify: (259) [user] subst_vars([1127, 0], [1127, 0], [], [])
   Call: (260) [system] var([1127, 0])
^  Redo: (259) [user] subst_vars([1127, 0], _499868, [], _484930)
^  Unify: (259) [user] subst_vars([1127, 0], [_515738|_515740], [], _484930)
^  Call: (260) [user] subst_vars(1127, _515738, [], _516678)
^  Unify: (260) [user] subst_vars(1127, 1127, [], [])
   Call: (261) [system] var(1127)
^  Redo: (260) [user] subst_vars(1127, _515738, [], _516678)
^  Unify: (260) [user] subst_vars(1127, _515738, [], _516678)
   Call: (261) [system] atom(1127)
^  Redo: (260) [user] subst_vars(1127, _515738, [], _516678)
^  Unify: (260) [user] subst_vars(1127, _515738, [], _516678)
   Call: (261) [system] compound(1127)
^  Redo: (260) [user] subst_vars(1127, _5980, [], _5984)
^  Unify: (260) [user] subst_vars(1127, 1127, [], [])
^  Exit: (260) [user] subst_vars(1127, 1127, [], [])
^  Call: (260) [user] subst_vars([0], _5982, [], _5944)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _5982, [], _5944)
^  Unify: (260) [user] subst_vars([0], [_13426|_13428], [], _5944)
^  Call: (261) [user] subst_vars(0, _13426, [], _14366)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _13426, [], _14366)
^  Unify: (261) [user] subst_vars(0, _13426, [], _14366)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _13426, [], _14366)
^  Unify: (261) [user] subst_vars(0, _13426, [], _14366)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _13426, [], _14366)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _13428, [], _5944)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _13428, [], _5944)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1127, 0], [1127, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     let program2 = \"", 1127, 0], [";;     let program2 = \"", 1127, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5942, '$COMMENT', [";;     let program2 = \"", 1127, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT', [";;     let program2 = \"", 1127, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     let program2 = \"", 1127, 0), '$COMMENT'(";;     let program2 = \"", 1127, 0), [], [])
   Call: (257) [system] _36784=metta_file_buffer(+, '$COMMENT'(";;     let program2 = \"", 1127, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     let program2 = \"", 1127, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     let program2 = \"", 1127, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let program2 = \"", 1127, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let program2 = \"", 1127, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program2 = \"", 1127, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program2 = \"", 1127, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program2 = \"", 1127, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program2 = \"", 1127, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1128, 0, 41490, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$stream_position'(41490, 1128, 0, 41490)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _89512))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _89512))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _89512)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _89512)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _89512)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _89512)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _95124))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _95124))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _95124))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _95124))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _95124)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _95124)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _100710))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _100710))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _100710)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _100710)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _100710)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _100710)
   Call: (270) [system] var('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _100710)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$VAR'(_108170))
   Call: (270) [system] atom('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _100710)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _100710)
   Call: (270) [system] '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _100710)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _100710)
   Call: (270) [system] '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _100710)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _100710)
   Call: (270) [system] '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0)==[_117450, _117456]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _100710)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _100710)
   Call: (270) [system] is_list('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _100710)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _100710)
   Call: (270) [system] string('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _100710)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _100710)
   Call: (270) [system] compound('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
   Exit: (270) [system] compound('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _127652, _127654)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT', [";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0], _131394)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0], _131394)
   Call: (271) [apply] apply:maplist_([";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0], _131394, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0], [_134212|_134214], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;      !(metta (id_num myAtom) %Undefined% &self)", _134212)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (id_num myAtom) %Undefined% &self)", _134212)
   Call: (273) [system] var(";;      !(metta (id_num myAtom) %Undefined% &self)")
^  Redo: (272) [user] mfix_vars1(";;      !(metta (id_num myAtom) %Undefined% &self)", _134212)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (id_num myAtom) %Undefined% &self)", '$VAR'(_138858))
   Call: (273) [system] atom(";;      !(metta (id_num myAtom) %Undefined% &self)")
^  Redo: (272) [user] mfix_vars1(";;      !(metta (id_num myAtom) %Undefined% &self)", _134212)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (id_num myAtom) %Undefined% &self)", _134212)
   Call: (273) [system] ";;      !(metta (id_num myAtom) %Undefined% &self)"==true
^  Redo: (272) [user] mfix_vars1(";;      !(metta (id_num myAtom) %Undefined% &self)", _134212)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (id_num myAtom) %Undefined% &self)", _134212)
   Call: (273) [system] ";;      !(metta (id_num myAtom) %Undefined% &self)"==false
^  Redo: (272) [user] mfix_vars1(";;      !(metta (id_num myAtom) %Undefined% &self)", _134212)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (id_num myAtom) %Undefined% &self)", _134212)
   Call: (273) [system] ";;      !(metta (id_num myAtom) %Undefined% &self)"==[_148138, _148144]
^  Redo: (272) [user] mfix_vars1(";;      !(metta (id_num myAtom) %Undefined% &self)", _134212)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (id_num myAtom) %Undefined% &self)", _134212)
   Call: (273) [system] is_list(";;      !(metta (id_num myAtom) %Undefined% &self)")
^  Redo: (272) [user] mfix_vars1(";;      !(metta (id_num myAtom) %Undefined% &self)", _134212)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (id_num myAtom) %Undefined% &self)", _134212)
   Call: (273) [system] string(";;      !(metta (id_num myAtom) %Undefined% &self)")
   Exit: (273) [system] string(";;      !(metta (id_num myAtom) %Undefined% &self)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;      !(metta (id_num myAtom) %Undefined% &self)", _134212)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (id_num myAtom) %Undefined% &self)", _134212)
   Call: (273) [system] compound(";;      !(metta (id_num myAtom) %Undefined% &self)")
^  Redo: (272) [user] mfix_vars1(";;      !(metta (id_num myAtom) %Undefined% &self)", _134212)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (id_num myAtom) %Undefined% &self)", _134212)
^  Call: (273) [user] symbol(";;      !(metta (id_num myAtom) %Undefined% &self)")
^  Unify: (273) [user] symbol(";;      !(metta (id_num myAtom) %Undefined% &self)")
   Call: (274) [system] atom(";;      !(metta (id_num myAtom) %Undefined% &self)")
   Fail: (274) [system] atom(";;      !(metta (id_num myAtom) %Undefined% &self)")
^  Fail: (273) [user] symbol(";;      !(metta (id_num myAtom) %Undefined% &self)")
^  Redo: (272) [user] mfix_vars1(";;      !(metta (id_num myAtom) %Undefined% &self)", _134212)
   Call: (273) [system] ";;      !(metta (id_num myAtom) %Undefined% &self)"=_134212
   Exit: (273) [system] ";;      !(metta (id_num myAtom) %Undefined% &self)"=";;      !(metta (id_num myAtom) %Undefined% &self)"
^  Exit: (272) [user] mfix_vars1(";;      !(metta (id_num myAtom) %Undefined% &self)", ";;      !(metta (id_num myAtom) %Undefined% &self)")
   Call: (272) [apply] apply:maplist_([1128, 0], _134214, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1128, 0], [_172210|_172212], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1128, _172210)
^  Unify: (273) [user] mfix_vars1(1128, _172210)
   Call: (274) [system] var(1128)
^  Redo: (273) [user] mfix_vars1(1128, _172210)
^  Unify: (273) [user] mfix_vars1(1128, '$VAR'(_176856))
   Call: (274) [system] atom(1128)
^  Redo: (273) [user] mfix_vars1(1128, _172210)
^  Unify: (273) [user] mfix_vars1(1128, _172210)
   Call: (274) [system] 1128==true
^  Redo: (273) [user] mfix_vars1(1128, _172210)
^  Unify: (273) [user] mfix_vars1(1128, _172210)
   Call: (274) [system] 1128==false
^  Redo: (273) [user] mfix_vars1(1128, _172210)
^  Unify: (273) [user] mfix_vars1(1128, _172210)
   Call: (274) [system] 1128==[_186136, _186142]
^  Redo: (273) [user] mfix_vars1(1128, _172210)
^  Unify: (273) [user] mfix_vars1(1128, _172210)
   Call: (274) [system] is_list(1128)
^  Redo: (273) [user] mfix_vars1(1128, _172210)
^  Unify: (273) [user] mfix_vars1(1128, _172210)
   Call: (274) [system] string(1128)
^  Redo: (273) [user] mfix_vars1(1128, _172210)
^  Unify: (273) [user] mfix_vars1(1128, _172210)
   Call: (274) [system] compound(1128)
^  Redo: (273) [user] mfix_vars1(1128, _172210)
^  Unify: (273) [user] mfix_vars1(1128, _172210)
^  Call: (274) [user] symbol(1128)
^  Unify: (274) [user] symbol(1128)
   Call: (275) [system] atom(1128)
   Fail: (275) [system] atom(1128)
^  Fail: (274) [user] symbol(1128)
^  Redo: (273) [user] mfix_vars1(1128, _172210)
   Call: (274) [system] 1128=_172210
   Exit: (274) [system] 1128=1128
^  Exit: (273) [user] mfix_vars1(1128, 1128)
   Call: (273) [apply] apply:maplist_([0], _172212, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_206536|_206538], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _206536)
^  Unify: (274) [user] mfix_vars1(0, _206536)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _206536)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_211182))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _206536)
^  Unify: (274) [user] mfix_vars1(0, _206536)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _206536)
^  Unify: (274) [user] mfix_vars1(0, _206536)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _206536)
^  Unify: (274) [user] mfix_vars1(0, _206536)
   Call: (275) [system] 0==[_220462, _220468]
^  Redo: (274) [user] mfix_vars1(0, _206536)
^  Unify: (274) [user] mfix_vars1(0, _206536)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _206536)
^  Unify: (274) [user] mfix_vars1(0, _206536)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _206536)
^  Unify: (274) [user] mfix_vars1(0, _206536)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _206536)
^  Unify: (274) [user] mfix_vars1(0, _206536)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _206536)
   Call: (275) [system] 0=_206536
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _206538, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1128, 0], [1128, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0], [";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0], [";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0])
   Call: (270) [system] compound_name_arguments(_100710, '$COMMENT', [";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT', [";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0)))
   Call: (267) [system] '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0)\=@='$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _95124)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _256710))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _256710))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _256710))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _256710))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _256710)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _256710)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _262296))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _262296))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _262296)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _262296)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _262296)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0)))
   Call: (267) [system] '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0)\=@='$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _256710)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _89512))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _89512))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _89512))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _89512))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _89512)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _89512)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _284616))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _284616))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _284616)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _284616)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _284616)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0)))
   Call: (267) [system] '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0)\=@='$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _89512)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0)))
   Call: (261) [system] '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0)\=@='$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _313394, [], _313396)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _313394, [], _313396)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _313394, [], _313396)
   Call: (258) [system] atom('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _313394, [], _313396)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _313394, [], _313396)
   Call: (258) [system] compound('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
   Exit: (258) [system] compound('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), _322710, _322712)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT', [";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0])
^  Call: (258) [user] subst_vars([";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0], _324596, [], _313396)
^  Unify: (258) [user] subst_vars([";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0], [";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0], [], [])
   Call: (259) [system] var([";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0])
^  Redo: (258) [user] subst_vars([";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0], _324596, [], _313396)
^  Unify: (258) [user] subst_vars([";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0], [_328332|_328334], [], _313396)
^  Call: (259) [user] subst_vars(";;      !(metta (id_num myAtom) %Undefined% &self)", _328332, [], _329272)
^  Unify: (259) [user] subst_vars(";;      !(metta (id_num myAtom) %Undefined% &self)", ";;      !(metta (id_num myAtom) %Undefined% &self)", [], [])
   Call: (260) [system] var(";;      !(metta (id_num myAtom) %Undefined% &self)")
^  Redo: (259) [user] subst_vars(";;      !(metta (id_num myAtom) %Undefined% &self)", _328332, [], _329272)
^  Unify: (259) [user] subst_vars(";;      !(metta (id_num myAtom) %Undefined% &self)", _328332, [], _329272)
   Call: (260) [system] atom(";;      !(metta (id_num myAtom) %Undefined% &self)")
^  Redo: (259) [user] subst_vars(";;      !(metta (id_num myAtom) %Undefined% &self)", _328332, [], _329272)
^  Unify: (259) [user] subst_vars(";;      !(metta (id_num myAtom) %Undefined% &self)", _328332, [], _329272)
   Call: (260) [system] compound(";;      !(metta (id_num myAtom) %Undefined% &self)")
^  Redo: (259) [user] subst_vars(";;      !(metta (id_num myAtom) %Undefined% &self)", _328332, [], _329272)
^  Unify: (259) [user] subst_vars(";;      !(metta (id_num myAtom) %Undefined% &self)", ";;      !(metta (id_num myAtom) %Undefined% &self)", [], [])
^  Exit: (259) [user] subst_vars(";;      !(metta (id_num myAtom) %Undefined% &self)", ";;      !(metta (id_num myAtom) %Undefined% &self)", [], [])
^  Call: (259) [user] subst_vars([1128, 0], _328334, [], _313396)
^  Unify: (259) [user] subst_vars([1128, 0], [1128, 0], [], [])
   Call: (260) [system] var([1128, 0])
^  Redo: (259) [user] subst_vars([1128, 0], _328334, [], _313396)
^  Unify: (259) [user] subst_vars([1128, 0], [_344204|_344206], [], _313396)
^  Call: (260) [user] subst_vars(1128, _344204, [], _345144)
^  Unify: (260) [user] subst_vars(1128, 1128, [], [])
   Call: (261) [system] var(1128)
^  Redo: (260) [user] subst_vars(1128, _344204, [], _345144)
^  Unify: (260) [user] subst_vars(1128, _344204, [], _345144)
   Call: (261) [system] atom(1128)
^  Redo: (260) [user] subst_vars(1128, _344204, [], _345144)
^  Unify: (260) [user] subst_vars(1128, _344204, [], _345144)
   Call: (261) [system] compound(1128)
^  Redo: (260) [user] subst_vars(1128, _344204, [], _345144)
^  Unify: (260) [user] subst_vars(1128, 1128, [], [])
^  Exit: (260) [user] subst_vars(1128, 1128, [], [])
^  Call: (260) [user] subst_vars([0], _344206, [], _313396)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _344206, [], _313396)
^  Unify: (260) [user] subst_vars([0], [_360076|_360078], [], _313396)
^  Call: (261) [user] subst_vars(0, _360076, [], _361016)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _360076, [], _361016)
^  Unify: (261) [user] subst_vars(0, _360076, [], _361016)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _360076, [], _361016)
^  Unify: (261) [user] subst_vars(0, _360076, [], _361016)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _360076, [], _361016)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _360078, [], _313396)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _360078, [], _313396)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1128, 0], [1128, 0], [], [])
^  Exit: (258) [user] subst_vars([";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0], [";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0], [], [])
   Call: (258) [system] compound_name_arguments(_313394, '$COMMENT', [";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT', [";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), [], [])
   Call: (257) [system] _383434=metta_file_buffer(+, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      !(metta (id_num myAtom) %Undefined% &self)", 1128, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1129, 0, 41541, '$COMMENT'(";;     \";", 1129, 0), '$stream_position'(41541, 1129, 0, 41541)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \";", 1129, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \";", 1129, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     \";", 1129, 0), _436152))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     \";", 1129, 0), _436152))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     \";", 1129, 0), _436152)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     \";", 1129, 0), _436152)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     \";", 1129, 0), _436152)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     \";", 1129, 0), _436152)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     \";", 1129, 0), _441764))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     \";", 1129, 0), _441764))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     \";", 1129, 0), _441764))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     \";", 1129, 0), _441764))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \";", 1129, 0), _441764)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \";", 1129, 0), _441764)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     \";", 1129, 0), _447350))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     \";", 1129, 0), _447350))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     \";", 1129, 0), _447350)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     \";", 1129, 0), _447350)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1129, 0), _447350)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1129, 0), _447350)
   Call: (270) [system] var('$COMMENT'(";;     \";", 1129, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1129, 0), _447350)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1129, 0), '$VAR'(_454810))
   Call: (270) [system] atom('$COMMENT'(";;     \";", 1129, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1129, 0), _447350)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1129, 0), _447350)
   Call: (270) [system] '$COMMENT'(";;     \";", 1129, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1129, 0), _447350)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1129, 0), _447350)
   Call: (270) [system] '$COMMENT'(";;     \";", 1129, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1129, 0), _447350)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1129, 0), _447350)
   Call: (270) [system] '$COMMENT'(";;     \";", 1129, 0)==[_464090, _464096]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1129, 0), _447350)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1129, 0), _447350)
   Call: (270) [system] is_list('$COMMENT'(";;     \";", 1129, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1129, 0), _447350)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1129, 0), _447350)
   Call: (270) [system] string('$COMMENT'(";;     \";", 1129, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1129, 0), _447350)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1129, 0), _447350)
   Call: (270) [system] compound('$COMMENT'(";;     \";", 1129, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     \";", 1129, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     \";", 1129, 0), _474292, _474294)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     \";", 1129, 0), '$COMMENT', [";;     \";", 1129, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     \";", 1129, 0], _478034)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     \";", 1129, 0], _478034)
   Call: (271) [apply] apply:maplist_([";;     \";", 1129, 0], _478034, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     \";", 1129, 0], [_480852|_480854], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     \";", _480852)
^  Unify: (272) [user] mfix_vars1(";;     \";", _480852)
   Call: (273) [system] var(";;     \";")
^  Redo: (272) [user] mfix_vars1(";;     \";", _480852)
^  Unify: (272) [user] mfix_vars1(";;     \";", '$VAR'(_485498))
   Call: (273) [system] atom(";;     \";")
^  Redo: (272) [user] mfix_vars1(";;     \";", _480852)
^  Unify: (272) [user] mfix_vars1(";;     \";", _480852)
   Call: (273) [system] ";;     \";"==true
^  Redo: (272) [user] mfix_vars1(";;     \";", _480852)
^  Unify: (272) [user] mfix_vars1(";;     \";", _480852)
   Call: (273) [system] ";;     \";"==false
^  Redo: (272) [user] mfix_vars1(";;     \";", _480852)
^  Unify: (272) [user] mfix_vars1(";;     \";", _480852)
   Call: (273) [system] ";;     \";"==[_494778, _494784]
^  Redo: (272) [user] mfix_vars1(";;     \";", _480852)
^  Unify: (272) [user] mfix_vars1(";;     \";", _480852)
   Call: (273) [system] is_list(";;     \";")
^  Redo: (272) [user] mfix_vars1(";;     \";", _480852)
^  Unify: (272) [user] mfix_vars1(";;     \";", _480852)
   Call: (273) [system] string(";;     \";")
   Exit: (273) [system] string(";;     \";")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     \";", _480852)
^  Unify: (272) [user] mfix_vars1(";;     \";", _480852)
   Call: (273) [system] compound(";;     \";")
^  Redo: (272) [user] mfix_vars1(";;     \";", _480852)
^  Unify: (272) [user] mfix_vars1(";;     \";", _480852)
^  Call: (273) [user] symbol(";;     \";")
^  Unify: (273) [user] symbol(";;     \";")
   Call: (274) [system] atom(";;     \";")
   Fail: (274) [system] atom(";;     \";")
^  Fail: (273) [user] symbol(";;     \";")
^  Redo: (272) [user] mfix_vars1(";;     \";", _480852)
   Call: (273) [system] ";;     \";"=_480852
   Exit: (273) [system] ";;     \";"=";;     \";"
^  Exit: (272) [user] mfix_vars1(";;     \";", ";;     \";")
   Call: (272) [apply] apply:maplist_([1129, 0], _480854, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1129, 0], [_518850|_518852], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1129, _518850)
^  Unify: (273) [user] mfix_vars1(1129, _518850)
   Call: (274) [system] var(1129)
^  Redo: (273) [user] mfix_vars1(1129, _518850)
^  Unify: (273) [user] mfix_vars1(1129, '$VAR'(_6038))
   Call: (274) [system] atom(1129)
^  Redo: (273) [user] mfix_vars1(1129, _6030)
^  Unify: (273) [user] mfix_vars1(1129, _6030)
   Call: (274) [system] 1129==true
^  Redo: (273) [user] mfix_vars1(1129, _6030)
^  Unify: (273) [user] mfix_vars1(1129, _6030)
   Call: (274) [system] 1129==false
^  Redo: (273) [user] mfix_vars1(1129, _6030)
^  Unify: (273) [user] mfix_vars1(1129, _6030)
   Call: (274) [system] 1129==[_14916, _14922]
^  Redo: (273) [user] mfix_vars1(1129, _6030)
^  Unify: (273) [user] mfix_vars1(1129, _6030)
   Call: (274) [system] is_list(1129)
^  Redo: (273) [user] mfix_vars1(1129, _6030)
^  Unify: (273) [user] mfix_vars1(1129, _6030)
   Call: (274) [system] string(1129)
^  Redo: (273) [user] mfix_vars1(1129, _6030)
^  Unify: (273) [user] mfix_vars1(1129, _6030)
   Call: (274) [system] compound(1129)
^  Redo: (273) [user] mfix_vars1(1129, _6030)
^  Unify: (273) [user] mfix_vars1(1129, _6030)
^  Call: (274) [user] symbol(1129)
^  Unify: (274) [user] symbol(1129)
   Call: (275) [system] atom(1129)
   Fail: (275) [system] atom(1129)
^  Fail: (274) [user] symbol(1129)
^  Redo: (273) [user] mfix_vars1(1129, _6030)
   Call: (274) [system] 1129=_6030
   Exit: (274) [system] 1129=1129
^  Exit: (273) [user] mfix_vars1(1129, 1129)
   Call: (273) [apply] apply:maplist_([0], _6032, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_35316|_35318], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _35316)
^  Unify: (274) [user] mfix_vars1(0, _35316)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _35316)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_39962))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _35316)
^  Unify: (274) [user] mfix_vars1(0, _35316)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _35316)
^  Unify: (274) [user] mfix_vars1(0, _35316)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _35316)
^  Unify: (274) [user] mfix_vars1(0, _35316)
   Call: (275) [system] 0==[_49242, _49248]
^  Redo: (274) [user] mfix_vars1(0, _35316)
^  Unify: (274) [user] mfix_vars1(0, _35316)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _35316)
^  Unify: (274) [user] mfix_vars1(0, _35316)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _35316)
^  Unify: (274) [user] mfix_vars1(0, _35316)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _35316)
^  Unify: (274) [user] mfix_vars1(0, _35316)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _35316)
   Call: (275) [system] 0=_35316
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _35318, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1129, 0], [1129, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     \";", 1129, 0], [";;     \";", 1129, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     \";", 1129, 0], [";;     \";", 1129, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";;     \";", 1129, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     \";", 1129, 0), '$COMMENT', [";;     \";", 1129, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0)))
   Call: (267) [system] '$COMMENT'(";;     \";", 1129, 0)\=@='$COMMENT'(";;     \";", 1129, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \";", 1129, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     \";", 1129, 0), _85490))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     \";", 1129, 0), _85490))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     \";", 1129, 0), _85490))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     \";", 1129, 0), _85490))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \";", 1129, 0), _85490)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \";", 1129, 0), _85490)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     \";", 1129, 0), _91076))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     \";", 1129, 0), _91076))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     \";", 1129, 0), _91076)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     \";", 1129, 0), _91076)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     \";", 1129, 0), _91076)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0)))
   Call: (267) [system] '$COMMENT'(";;     \";", 1129, 0)\=@='$COMMENT'(";;     \";", 1129, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \";", 1129, 0), _85490)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     \";", 1129, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     \";", 1129, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     \";", 1129, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     \";", 1129, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \";", 1129, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \";", 1129, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     \";", 1129, 0), _113396))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     \";", 1129, 0), _113396))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     \";", 1129, 0), _113396)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     \";", 1129, 0), _113396)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     \";", 1129, 0), _113396)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0)))
   Call: (267) [system] '$COMMENT'(";;     \";", 1129, 0)\=@='$COMMENT'(";;     \";", 1129, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \";", 1129, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0)))
   Call: (261) [system] '$COMMENT'(";;     \";", 1129, 0)\=@='$COMMENT'(";;     \";", 1129, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \";", 1129, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1129, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1129, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1129, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1129, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1129, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1129, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     \";", 1129, 0), _142174, [], _142176)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     \";", 1129, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     \";", 1129, 0), _142174, [], _142176)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \";", 1129, 0), _142174, [], _142176)
   Call: (258) [system] atom('$COMMENT'(";;     \";", 1129, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     \";", 1129, 0), _142174, [], _142176)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \";", 1129, 0), _142174, [], _142176)
   Call: (258) [system] compound('$COMMENT'(";;     \";", 1129, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     \";", 1129, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     \";", 1129, 0), _151490, _151492)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     \";", 1129, 0), '$COMMENT', [";;     \";", 1129, 0])
^  Call: (258) [user] subst_vars([";;     \";", 1129, 0], _153376, [], _142176)
^  Unify: (258) [user] subst_vars([";;     \";", 1129, 0], [";;     \";", 1129, 0], [], [])
   Call: (259) [system] var([";;     \";", 1129, 0])
^  Redo: (258) [user] subst_vars([";;     \";", 1129, 0], _153376, [], _142176)
^  Unify: (258) [user] subst_vars([";;     \";", 1129, 0], [_157112|_157114], [], _142176)
^  Call: (259) [user] subst_vars(";;     \";", _157112, [], _158052)
^  Unify: (259) [user] subst_vars(";;     \";", ";;     \";", [], [])
   Call: (260) [system] var(";;     \";")
^  Redo: (259) [user] subst_vars(";;     \";", _157112, [], _158052)
^  Unify: (259) [user] subst_vars(";;     \";", _157112, [], _158052)
   Call: (260) [system] atom(";;     \";")
^  Redo: (259) [user] subst_vars(";;     \";", _157112, [], _158052)
^  Unify: (259) [user] subst_vars(";;     \";", _157112, [], _158052)
   Call: (260) [system] compound(";;     \";")
^  Redo: (259) [user] subst_vars(";;     \";", _157112, [], _158052)
^  Unify: (259) [user] subst_vars(";;     \";", ";;     \";", [], [])
^  Exit: (259) [user] subst_vars(";;     \";", ";;     \";", [], [])
^  Call: (259) [user] subst_vars([1129, 0], _157114, [], _142176)
^  Unify: (259) [user] subst_vars([1129, 0], [1129, 0], [], [])
   Call: (260) [system] var([1129, 0])
^  Redo: (259) [user] subst_vars([1129, 0], _157114, [], _142176)
^  Unify: (259) [user] subst_vars([1129, 0], [_172984|_172986], [], _142176)
^  Call: (260) [user] subst_vars(1129, _172984, [], _173924)
^  Unify: (260) [user] subst_vars(1129, 1129, [], [])
   Call: (261) [system] var(1129)
^  Redo: (260) [user] subst_vars(1129, _172984, [], _173924)
^  Unify: (260) [user] subst_vars(1129, _172984, [], _173924)
   Call: (261) [system] atom(1129)
^  Redo: (260) [user] subst_vars(1129, _172984, [], _173924)
^  Unify: (260) [user] subst_vars(1129, _172984, [], _173924)
   Call: (261) [system] compound(1129)
^  Redo: (260) [user] subst_vars(1129, _172984, [], _173924)
^  Unify: (260) [user] subst_vars(1129, 1129, [], [])
^  Exit: (260) [user] subst_vars(1129, 1129, [], [])
^  Call: (260) [user] subst_vars([0], _172986, [], _142176)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _172986, [], _142176)
^  Unify: (260) [user] subst_vars([0], [_188856|_188858], [], _142176)
^  Call: (261) [user] subst_vars(0, _188856, [], _189796)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _188856, [], _189796)
^  Unify: (261) [user] subst_vars(0, _188856, [], _189796)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _188856, [], _189796)
^  Unify: (261) [user] subst_vars(0, _188856, [], _189796)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _188856, [], _189796)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _188858, [], _142176)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _188858, [], _142176)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1129, 0], [1129, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     \";", 1129, 0], [";;     \";", 1129, 0], [], [])
   Call: (258) [system] compound_name_arguments(_142174, '$COMMENT', [";;     \";", 1129, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     \";", 1129, 0), '$COMMENT', [";;     \";", 1129, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     \";", 1129, 0), '$COMMENT'(";;     \";", 1129, 0), [], [])
   Call: (257) [system] _212214=metta_file_buffer(+, '$COMMENT'(";;     \";", 1129, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     \";", 1129, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     \";", 1129, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     \";", 1129, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     \";", 1129, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \";", 1129, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \";", 1129, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \";", 1129, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \";", 1129, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1130, 0, 41551, '$COMMENT'(";;", 1130, 0), '$stream_position'(41551, 1130, 0, 41551)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1130, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1130, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1130, 0), _264930))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1130, 0), _264930))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1130, 0), _264930)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1130, 0), _264930)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1130, 0), _264930)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1130, 0), _264930)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1130, 0), _270542))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1130, 0), _270542))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1130, 0), _270542))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1130, 0), _270542))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1130, 0), _270542)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1130, 0), _270542)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1130, 0), _276128))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1130, 0), _276128))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1130, 0), _276128)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1130, 0), _276128)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1130, 0), _276128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1130, 0), _276128)
   Call: (270) [system] var('$COMMENT'(";;", 1130, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1130, 0), _276128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1130, 0), '$VAR'(_283588))
   Call: (270) [system] atom('$COMMENT'(";;", 1130, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1130, 0), _276128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1130, 0), _276128)
   Call: (270) [system] '$COMMENT'(";;", 1130, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1130, 0), _276128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1130, 0), _276128)
   Call: (270) [system] '$COMMENT'(";;", 1130, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1130, 0), _276128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1130, 0), _276128)
   Call: (270) [system] '$COMMENT'(";;", 1130, 0)==[_292868, _292874]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1130, 0), _276128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1130, 0), _276128)
   Call: (270) [system] is_list('$COMMENT'(";;", 1130, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1130, 0), _276128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1130, 0), _276128)
   Call: (270) [system] string('$COMMENT'(";;", 1130, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1130, 0), _276128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1130, 0), _276128)
   Call: (270) [system] compound('$COMMENT'(";;", 1130, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1130, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1130, 0), _303070, _303072)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1130, 0), '$COMMENT', [";;", 1130, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1130, 0], _306812)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1130, 0], _306812)
   Call: (271) [apply] apply:maplist_([";;", 1130, 0], _306812, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1130, 0], [_309630|_309632], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _309630)
^  Unify: (272) [user] mfix_vars1(";;", _309630)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _309630)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_314276))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _309630)
^  Unify: (272) [user] mfix_vars1(";;", _309630)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _309630)
^  Unify: (272) [user] mfix_vars1(";;", _309630)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _309630)
^  Unify: (272) [user] mfix_vars1(";;", _309630)
   Call: (273) [system] ";;"==[_323556, _323562]
^  Redo: (272) [user] mfix_vars1(";;", _309630)
^  Unify: (272) [user] mfix_vars1(";;", _309630)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _309630)
^  Unify: (272) [user] mfix_vars1(";;", _309630)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _309630)
^  Unify: (272) [user] mfix_vars1(";;", _309630)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _309630)
^  Unify: (272) [user] mfix_vars1(";;", _309630)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _309630)
   Call: (273) [system] ";;"=_309630
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1130, 0], _309632, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1130, 0], [_347628|_347630], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1130, _347628)
^  Unify: (273) [user] mfix_vars1(1130, _347628)
   Call: (274) [system] var(1130)
^  Redo: (273) [user] mfix_vars1(1130, _347628)
^  Unify: (273) [user] mfix_vars1(1130, '$VAR'(_352274))
   Call: (274) [system] atom(1130)
^  Redo: (273) [user] mfix_vars1(1130, _347628)
^  Unify: (273) [user] mfix_vars1(1130, _347628)
   Call: (274) [system] 1130==true
^  Redo: (273) [user] mfix_vars1(1130, _347628)
^  Unify: (273) [user] mfix_vars1(1130, _347628)
   Call: (274) [system] 1130==false
^  Redo: (273) [user] mfix_vars1(1130, _347628)
^  Unify: (273) [user] mfix_vars1(1130, _347628)
   Call: (274) [system] 1130==[_361554, _361560]
^  Redo: (273) [user] mfix_vars1(1130, _347628)
^  Unify: (273) [user] mfix_vars1(1130, _347628)
   Call: (274) [system] is_list(1130)
^  Redo: (273) [user] mfix_vars1(1130, _347628)
^  Unify: (273) [user] mfix_vars1(1130, _347628)
   Call: (274) [system] string(1130)
^  Redo: (273) [user] mfix_vars1(1130, _347628)
^  Unify: (273) [user] mfix_vars1(1130, _347628)
   Call: (274) [system] compound(1130)
^  Redo: (273) [user] mfix_vars1(1130, _347628)
^  Unify: (273) [user] mfix_vars1(1130, _347628)
^  Call: (274) [user] symbol(1130)
^  Unify: (274) [user] symbol(1130)
   Call: (275) [system] atom(1130)
   Fail: (275) [system] atom(1130)
^  Fail: (274) [user] symbol(1130)
^  Redo: (273) [user] mfix_vars1(1130, _347628)
   Call: (274) [system] 1130=_347628
   Exit: (274) [system] 1130=1130
^  Exit: (273) [user] mfix_vars1(1130, 1130)
   Call: (273) [apply] apply:maplist_([0], _347630, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_381954|_381956], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _381954)
^  Unify: (274) [user] mfix_vars1(0, _381954)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _381954)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_386600))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _381954)
^  Unify: (274) [user] mfix_vars1(0, _381954)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _381954)
^  Unify: (274) [user] mfix_vars1(0, _381954)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _381954)
^  Unify: (274) [user] mfix_vars1(0, _381954)
   Call: (275) [system] 0==[_395880, _395886]
^  Redo: (274) [user] mfix_vars1(0, _381954)
^  Unify: (274) [user] mfix_vars1(0, _381954)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _381954)
^  Unify: (274) [user] mfix_vars1(0, _381954)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _381954)
^  Unify: (274) [user] mfix_vars1(0, _381954)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _381954)
^  Unify: (274) [user] mfix_vars1(0, _381954)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _381954)
   Call: (275) [system] 0=_381954
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _381956, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1130, 0], [1130, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1130, 0], [";;", 1130, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1130, 0], [";;", 1130, 0])
   Call: (270) [system] compound_name_arguments(_276128, '$COMMENT', [";;", 1130, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1130, 0), '$COMMENT', [";;", 1130, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1130, 0)\=@='$COMMENT'(";;", 1130, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1130, 0), _270542)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1130, 0), _432128))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1130, 0), _432128))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1130, 0), _432128))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1130, 0), _432128))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1130, 0), _432128)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1130, 0), _432128)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1130, 0), _437714))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1130, 0), _437714))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1130, 0), _437714)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1130, 0), _437714)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1130, 0), _437714)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1130, 0)\=@='$COMMENT'(";;", 1130, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1130, 0), _432128)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1130, 0), _264930))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1130, 0), _264930))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1130, 0), _264930))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1130, 0), _264930))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1130, 0), _264930)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1130, 0), _264930)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1130, 0), _460034))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1130, 0), _460034))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1130, 0), _460034)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1130, 0), _460034)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1130, 0), _460034)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1130, 0)\=@='$COMMENT'(";;", 1130, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1130, 0), _264930)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1130, 0)\=@='$COMMENT'(";;", 1130, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1130, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1130, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1130, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1130, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1130, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1130, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1130, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1130, 0), _488812, [], _488814)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1130, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1130, 0), _488812, [], _488814)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1130, 0), _488812, [], _488814)
   Call: (258) [system] atom('$COMMENT'(";;", 1130, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1130, 0), _488812, [], _488814)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1130, 0), _488812, [], _488814)
   Call: (258) [system] compound('$COMMENT'(";;", 1130, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1130, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1130, 0), _498128, _498130)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1130, 0), '$COMMENT', [";;", 1130, 0])
^  Call: (258) [user] subst_vars([";;", 1130, 0], _500014, [], _488814)
^  Unify: (258) [user] subst_vars([";;", 1130, 0], [";;", 1130, 0], [], [])
   Call: (259) [system] var([";;", 1130, 0])
^  Redo: (258) [user] subst_vars([";;", 1130, 0], _500014, [], _488814)
^  Unify: (258) [user] subst_vars([";;", 1130, 0], [_503750|_503752], [], _488814)
^  Call: (259) [user] subst_vars(";;", _503750, [], _504690)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _503750, [], _504690)
^  Unify: (259) [user] subst_vars(";;", _503750, [], _504690)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _503750, [], _504690)
^  Unify: (259) [user] subst_vars(";;", _503750, [], _504690)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _503750, [], _504690)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1130, 0], _503752, [], _488814)
^  Unify: (259) [user] subst_vars([1130, 0], [1130, 0], [], [])
   Call: (260) [system] var([1130, 0])
^  Redo: (259) [user] subst_vars([1130, 0], _503752, [], _488814)
^  Unify: (259) [user] subst_vars([1130, 0], [_519622|_519624], [], _488814)
^  Call: (260) [user] subst_vars(1130, _519622, [], _520562)
^  Unify: (260) [user] subst_vars(1130, 1130, [], [])
   Call: (261) [system] var(1130)
^  Redo: (260) [user] subst_vars(1130, _5974, [], _5978)
^  Unify: (260) [user] subst_vars(1130, _5974, [], _5978)
   Call: (261) [system] atom(1130)
^  Redo: (260) [user] subst_vars(1130, _5974, [], _5978)
^  Unify: (260) [user] subst_vars(1130, _5974, [], _5978)
   Call: (261) [system] compound(1130)
^  Redo: (260) [user] subst_vars(1130, _5974, [], _5978)
^  Unify: (260) [user] subst_vars(1130, 1130, [], [])
^  Exit: (260) [user] subst_vars(1130, 1130, [], [])
^  Call: (260) [user] subst_vars([0], _5976, [], _5938)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _5976, [], _5938)
^  Unify: (260) [user] subst_vars([0], [_17536|_17538], [], _5938)
^  Call: (261) [user] subst_vars(0, _17536, [], _18476)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _17536, [], _18476)
^  Unify: (261) [user] subst_vars(0, _17536, [], _18476)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _17536, [], _18476)
^  Unify: (261) [user] subst_vars(0, _17536, [], _18476)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _17536, [], _18476)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _17538, [], _5938)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _17538, [], _5938)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1130, 0], [1130, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1130, 0], [";;", 1130, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5936, '$COMMENT', [";;", 1130, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1130, 0), '$COMMENT', [";;", 1130, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1130, 0), '$COMMENT'(";;", 1130, 0), [], [])
   Call: (257) [system] _40894=metta_file_buffer(+, '$COMMENT'(";;", 1130, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1130, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1130, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1130, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1130, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1130, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1130, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1130, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1130, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1131, 0, 41554, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$stream_position'(41554, 1131, 0, 41554)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _93624))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _93624))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _93624)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _93624)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _93624)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _93624)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _99236))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _99236))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _99236))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _99236))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _99236)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _99236)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _104822))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _104822))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _104822)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _104822)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _104822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _104822)
   Call: (270) [system] var('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _104822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$VAR'(_112282))
   Call: (270) [system] atom('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _104822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _104822)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _104822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _104822)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _104822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _104822)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0)==[_121562, _121568]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _104822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _104822)
   Call: (270) [system] is_list('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _104822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _104822)
   Call: (270) [system] string('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _104822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _104822)
   Call: (270) [system] compound('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _131764, _131766)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0], _135506)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0], _135506)
   Call: (271) [apply] apply:maplist_([";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0], _135506, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0], [_138324|_138326], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _138324)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _138324)
   Call: (273) [system] var(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _138324)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", '$VAR'(_142970))
   Call: (273) [system] atom(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _138324)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _138324)
   Call: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program2)),"==true
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _138324)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _138324)
   Call: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program2)),"==false
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _138324)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _138324)
   Call: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program2)),"==[_152250, _152256]
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _138324)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _138324)
   Call: (273) [system] is_list(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _138324)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _138324)
   Call: (273) [system] string(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
   Exit: (273) [system] string(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _138324)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _138324)
   Call: (273) [system] compound(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _138324)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _138324)
^  Call: (273) [user] symbol(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
^  Unify: (273) [user] symbol(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
   Call: (274) [system] atom(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
   Fail: (274) [system] atom(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
^  Fail: (273) [user] symbol(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _138324)
   Call: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program2)),"=_138324
   Exit: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program2)),"=";;     assert_eq!(metta.run(SExprParser::new(program2)),"
^  Exit: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", ";;     assert_eq!(metta.run(SExprParser::new(program2)),")
   Call: (272) [apply] apply:maplist_([1131, 0], _138326, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1131, 0], [_176322|_176324], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1131, _176322)
^  Unify: (273) [user] mfix_vars1(1131, _176322)
   Call: (274) [system] var(1131)
^  Redo: (273) [user] mfix_vars1(1131, _176322)
^  Unify: (273) [user] mfix_vars1(1131, '$VAR'(_180968))
   Call: (274) [system] atom(1131)
^  Redo: (273) [user] mfix_vars1(1131, _176322)
^  Unify: (273) [user] mfix_vars1(1131, _176322)
   Call: (274) [system] 1131==true
^  Redo: (273) [user] mfix_vars1(1131, _176322)
^  Unify: (273) [user] mfix_vars1(1131, _176322)
   Call: (274) [system] 1131==false
^  Redo: (273) [user] mfix_vars1(1131, _176322)
^  Unify: (273) [user] mfix_vars1(1131, _176322)
   Call: (274) [system] 1131==[_190248, _190254]
^  Redo: (273) [user] mfix_vars1(1131, _176322)
^  Unify: (273) [user] mfix_vars1(1131, _176322)
   Call: (274) [system] is_list(1131)
^  Redo: (273) [user] mfix_vars1(1131, _176322)
^  Unify: (273) [user] mfix_vars1(1131, _176322)
   Call: (274) [system] string(1131)
^  Redo: (273) [user] mfix_vars1(1131, _176322)
^  Unify: (273) [user] mfix_vars1(1131, _176322)
   Call: (274) [system] compound(1131)
^  Redo: (273) [user] mfix_vars1(1131, _176322)
^  Unify: (273) [user] mfix_vars1(1131, _176322)
^  Call: (274) [user] symbol(1131)
^  Unify: (274) [user] symbol(1131)
   Call: (275) [system] atom(1131)
   Fail: (275) [system] atom(1131)
^  Fail: (274) [user] symbol(1131)
^  Redo: (273) [user] mfix_vars1(1131, _176322)
   Call: (274) [system] 1131=_176322
   Exit: (274) [system] 1131=1131
^  Exit: (273) [user] mfix_vars1(1131, 1131)
   Call: (273) [apply] apply:maplist_([0], _176324, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_210648|_210650], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _210648)
^  Unify: (274) [user] mfix_vars1(0, _210648)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _210648)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_215294))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _210648)
^  Unify: (274) [user] mfix_vars1(0, _210648)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _210648)
^  Unify: (274) [user] mfix_vars1(0, _210648)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _210648)
^  Unify: (274) [user] mfix_vars1(0, _210648)
   Call: (275) [system] 0==[_224574, _224580]
^  Redo: (274) [user] mfix_vars1(0, _210648)
^  Unify: (274) [user] mfix_vars1(0, _210648)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _210648)
^  Unify: (274) [user] mfix_vars1(0, _210648)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _210648)
^  Unify: (274) [user] mfix_vars1(0, _210648)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _210648)
^  Unify: (274) [user] mfix_vars1(0, _210648)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _210648)
   Call: (275) [system] 0=_210648
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _210650, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1131, 0], [1131, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0], [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0], [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0])
   Call: (270) [system] compound_name_arguments(_104822, '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0)\=@='$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _99236)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _260822))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _260822))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _260822))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _260822))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _260822)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _260822)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _266408))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _266408))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _266408)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _266408)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _266408)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0)\=@='$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _260822)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _93624))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _93624))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _93624))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _93624))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _93624)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _93624)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _288728))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _288728))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _288728)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _288728)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _288728)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0)\=@='$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _93624)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0)))
   Call: (261) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0)\=@='$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _317506, [], _317508)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _317506, [], _317508)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _317506, [], _317508)
   Call: (258) [system] atom('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _317506, [], _317508)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _317506, [], _317508)
   Call: (258) [system] compound('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), _326822, _326824)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0])
^  Call: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0], _328708, [], _317508)
^  Unify: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0], [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0], [], [])
   Call: (259) [system] var([";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0])
^  Redo: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0], _328708, [], _317508)
^  Unify: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0], [_332444|_332446], [], _317508)
^  Call: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _332444, [], _333384)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program2)),", ";;     assert_eq!(metta.run(SExprParser::new(program2)),", [], [])
   Call: (260) [system] var(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _332444, [], _333384)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _332444, [], _333384)
   Call: (260) [system] atom(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _332444, [], _333384)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _332444, [], _333384)
   Call: (260) [system] compound(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _332444, [], _333384)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program2)),", ";;     assert_eq!(metta.run(SExprParser::new(program2)),", [], [])
^  Exit: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program2)),", ";;     assert_eq!(metta.run(SExprParser::new(program2)),", [], [])
^  Call: (259) [user] subst_vars([1131, 0], _332446, [], _317508)
^  Unify: (259) [user] subst_vars([1131, 0], [1131, 0], [], [])
   Call: (260) [system] var([1131, 0])
^  Redo: (259) [user] subst_vars([1131, 0], _332446, [], _317508)
^  Unify: (259) [user] subst_vars([1131, 0], [_348316|_348318], [], _317508)
^  Call: (260) [user] subst_vars(1131, _348316, [], _349256)
^  Unify: (260) [user] subst_vars(1131, 1131, [], [])
   Call: (261) [system] var(1131)
^  Redo: (260) [user] subst_vars(1131, _348316, [], _349256)
^  Unify: (260) [user] subst_vars(1131, _348316, [], _349256)
   Call: (261) [system] atom(1131)
^  Redo: (260) [user] subst_vars(1131, _348316, [], _349256)
^  Unify: (260) [user] subst_vars(1131, _348316, [], _349256)
   Call: (261) [system] compound(1131)
^  Redo: (260) [user] subst_vars(1131, _348316, [], _349256)
^  Unify: (260) [user] subst_vars(1131, 1131, [], [])
^  Exit: (260) [user] subst_vars(1131, 1131, [], [])
^  Call: (260) [user] subst_vars([0], _348318, [], _317508)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _348318, [], _317508)
^  Unify: (260) [user] subst_vars([0], [_364188|_364190], [], _317508)
^  Call: (261) [user] subst_vars(0, _364188, [], _365128)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _364188, [], _365128)
^  Unify: (261) [user] subst_vars(0, _364188, [], _365128)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _364188, [], _365128)
^  Unify: (261) [user] subst_vars(0, _364188, [], _365128)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _364188, [], _365128)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _364190, [], _317508)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _364190, [], _317508)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1131, 0], [1131, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0], [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0], [], [])
   Call: (258) [system] compound_name_arguments(_317506, '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), [], [])
   Call: (257) [system] _387546=metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1131, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1132, 0, 41611, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$stream_position'(41611, 1132, 0, 41611)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _440276))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _440276))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _440276)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _440276)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _440276)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _440276)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _445888))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _445888))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _445888))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _445888))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _445888)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _445888)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _451474))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _451474))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _451474)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _451474)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _451474)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _451474)
   Call: (270) [system] var('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _451474)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$VAR'(_458934))
   Call: (270) [system] atom('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _451474)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _451474)
   Call: (270) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _451474)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _451474)
   Call: (270) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _451474)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _451474)
   Call: (270) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0)==[_468214, _468220]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _451474)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _451474)
   Call: (270) [system] is_list('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _451474)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _451474)
   Call: (270) [system] string('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _451474)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _451474)
   Call: (270) [system] compound('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _478416, _478418)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0], _482158)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0], _482158)
   Call: (271) [apply] apply:maplist_([";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0], _482158, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0], [_484976|_484978], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _484976)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _484976)
   Call: (273) [system] var(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _484976)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", '$VAR'(_489622))
   Call: (273) [system] atom(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _484976)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _484976)
   Call: (273) [system] ";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));"==true
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _484976)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _484976)
   Call: (273) [system] ";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));"==false
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _484976)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _484976)
   Call: (273) [system] ";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));"==[_498902, _498908]
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _484976)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _484976)
   Call: (273) [system] is_list(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _484976)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _484976)
   Call: (273) [system] string(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
   Exit: (273) [system] string(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _484976)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _484976)
   Call: (273) [system] compound(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _484976)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _484976)
^  Call: (273) [user] symbol(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
^  Unify: (273) [user] symbol(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
   Call: (274) [system] atom(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
   Fail: (274) [system] atom(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
^  Fail: (273) [user] symbol(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _484976)
   Call: (273) [system] ";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));"=_484976
   Exit: (273) [system] ";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));"=";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));"
^  Exit: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", ";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
   Call: (272) [apply] apply:maplist_([1132, 0], _484978, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1132, 0], [_522974|_522976], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1132, _6042)
^  Unify: (273) [user] mfix_vars1(1132, _6042)
   Call: (274) [system] var(1132)
^  Redo: (273) [user] mfix_vars1(1132, _6042)
^  Unify: (273) [user] mfix_vars1(1132, '$VAR'(_9688))
   Call: (274) [system] atom(1132)
^  Redo: (273) [user] mfix_vars1(1132, _6042)
^  Unify: (273) [user] mfix_vars1(1132, _6042)
   Call: (274) [system] 1132==true
^  Redo: (273) [user] mfix_vars1(1132, _6042)
^  Unify: (273) [user] mfix_vars1(1132, _6042)
   Call: (274) [system] 1132==false
^  Redo: (273) [user] mfix_vars1(1132, _6042)
^  Unify: (273) [user] mfix_vars1(1132, _6042)
   Call: (274) [system] 1132==[_18968, _18974]
^  Redo: (273) [user] mfix_vars1(1132, _6042)
^  Unify: (273) [user] mfix_vars1(1132, _6042)
   Call: (274) [system] is_list(1132)
^  Redo: (273) [user] mfix_vars1(1132, _6042)
^  Unify: (273) [user] mfix_vars1(1132, _6042)
   Call: (274) [system] string(1132)
^  Redo: (273) [user] mfix_vars1(1132, _6042)
^  Unify: (273) [user] mfix_vars1(1132, _6042)
   Call: (274) [system] compound(1132)
^  Redo: (273) [user] mfix_vars1(1132, _6042)
^  Unify: (273) [user] mfix_vars1(1132, _6042)
^  Call: (274) [user] symbol(1132)
^  Unify: (274) [user] symbol(1132)
   Call: (275) [system] atom(1132)
   Fail: (275) [system] atom(1132)
^  Fail: (274) [user] symbol(1132)
^  Redo: (273) [user] mfix_vars1(1132, _6042)
   Call: (274) [system] 1132=_6042
   Exit: (274) [system] 1132=1132
^  Exit: (273) [user] mfix_vars1(1132, 1132)
   Call: (273) [apply] apply:maplist_([0], _6044, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_39368|_39370], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _39368)
^  Unify: (274) [user] mfix_vars1(0, _39368)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _39368)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_44014))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _39368)
^  Unify: (274) [user] mfix_vars1(0, _39368)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _39368)
^  Unify: (274) [user] mfix_vars1(0, _39368)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _39368)
^  Unify: (274) [user] mfix_vars1(0, _39368)
   Call: (275) [system] 0==[_53294, _53300]
^  Redo: (274) [user] mfix_vars1(0, _39368)
^  Unify: (274) [user] mfix_vars1(0, _39368)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _39368)
^  Unify: (274) [user] mfix_vars1(0, _39368)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _39368)
^  Unify: (274) [user] mfix_vars1(0, _39368)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _39368)
^  Unify: (274) [user] mfix_vars1(0, _39368)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _39368)
   Call: (275) [system] 0=_39368
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _39370, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1132, 0], [1132, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0], [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0], [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0])
   Call: (270) [system] compound_name_arguments(_5990, '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0)))
   Call: (267) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0)\=@='$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _5976)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _89542))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _89542))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _89542))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _89542))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _89542)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _89542)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _95128))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _95128))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _95128)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _95128)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _95128)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0)))
   Call: (267) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0)\=@='$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _89542)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _5956))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _5956))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _5956))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _5956))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _5956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _5956)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _117448))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _117448))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _117448)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _117448)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _117448)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0)))
   Call: (267) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0)\=@='$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _5956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0)))
   Call: (261) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0)\=@='$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _146226, [], _146228)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _146226, [], _146228)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _146226, [], _146228)
   Call: (258) [system] atom('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _146226, [], _146228)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _146226, [], _146228)
   Call: (258) [system] compound('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), _155542, _155544)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0])
^  Call: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0], _157428, [], _146228)
^  Unify: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0], [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0], [], [])
   Call: (259) [system] var([";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0])
^  Redo: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0], _157428, [], _146228)
^  Unify: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0], [_161164|_161166], [], _146228)
^  Call: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _161164, [], _162104)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", ";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", [], [])
   Call: (260) [system] var(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
^  Redo: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _161164, [], _162104)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _161164, [], _162104)
   Call: (260) [system] atom(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
^  Redo: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _161164, [], _162104)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _161164, [], _162104)
   Call: (260) [system] compound(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));")
^  Redo: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", _161164, [], _162104)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", ";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", [], [])
^  Exit: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", ";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", [], [])
^  Call: (259) [user] subst_vars([1132, 0], _161166, [], _146228)
^  Unify: (259) [user] subst_vars([1132, 0], [1132, 0], [], [])
   Call: (260) [system] var([1132, 0])
^  Redo: (259) [user] subst_vars([1132, 0], _161166, [], _146228)
^  Unify: (259) [user] subst_vars([1132, 0], [_177036|_177038], [], _146228)
^  Call: (260) [user] subst_vars(1132, _177036, [], _177976)
^  Unify: (260) [user] subst_vars(1132, 1132, [], [])
   Call: (261) [system] var(1132)
^  Redo: (260) [user] subst_vars(1132, _177036, [], _177976)
^  Unify: (260) [user] subst_vars(1132, _177036, [], _177976)
   Call: (261) [system] atom(1132)
^  Redo: (260) [user] subst_vars(1132, _177036, [], _177976)
^  Unify: (260) [user] subst_vars(1132, _177036, [], _177976)
   Call: (261) [system] compound(1132)
^  Redo: (260) [user] subst_vars(1132, _177036, [], _177976)
^  Unify: (260) [user] subst_vars(1132, 1132, [], [])
^  Exit: (260) [user] subst_vars(1132, 1132, [], [])
^  Call: (260) [user] subst_vars([0], _177038, [], _146228)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _177038, [], _146228)
^  Unify: (260) [user] subst_vars([0], [_192908|_192910], [], _146228)
^  Call: (261) [user] subst_vars(0, _192908, [], _193848)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _192908, [], _193848)
^  Unify: (261) [user] subst_vars(0, _192908, [], _193848)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _192908, [], _193848)
^  Unify: (261) [user] subst_vars(0, _192908, [], _193848)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _192908, [], _193848)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _192910, [], _146228)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _192910, [], _146228)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1132, 0], [1132, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0], [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0], [], [])
   Call: (258) [system] compound_name_arguments(_146226, '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), [], [])
   Call: (257) [system] _216266=metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" \"myAtom\" \"BadType\")]]));", 1132, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1133, 0, 41674, '$COMMENT'(";; }", 1133, 0), '$stream_position'(41674, 1133, 0, 41674)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1133, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1133, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; }", 1133, 0), _268982))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1133, 0), _268982))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; }", 1133, 0), _268982)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1133, 0), _268982)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1133, 0), _268982)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1133, 0), _268982)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; }", 1133, 0), _274594))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1133, 0), _274594))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1133, 0), _274594))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1133, 0), _274594))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1133, 0), _274594)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1133, 0), _274594)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; }", 1133, 0), _280180))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1133, 0), _280180))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; }", 1133, 0), _280180)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1133, 0), _280180)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; }", 1133, 0), _280180)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1133, 0), _280180)
   Call: (270) [system] var('$COMMENT'(";; }", 1133, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1133, 0), _280180)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1133, 0), '$VAR'(_287640))
   Call: (270) [system] atom('$COMMENT'(";; }", 1133, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1133, 0), _280180)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1133, 0), _280180)
   Call: (270) [system] '$COMMENT'(";; }", 1133, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1133, 0), _280180)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1133, 0), _280180)
   Call: (270) [system] '$COMMENT'(";; }", 1133, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1133, 0), _280180)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1133, 0), _280180)
   Call: (270) [system] '$COMMENT'(";; }", 1133, 0)==[_296920, _296926]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1133, 0), _280180)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1133, 0), _280180)
   Call: (270) [system] is_list('$COMMENT'(";; }", 1133, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1133, 0), _280180)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1133, 0), _280180)
   Call: (270) [system] string('$COMMENT'(";; }", 1133, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1133, 0), _280180)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1133, 0), _280180)
   Call: (270) [system] compound('$COMMENT'(";; }", 1133, 0))
   Exit: (270) [system] compound('$COMMENT'(";; }", 1133, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1133, 0), _307122, _307124)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1133, 0), '$COMMENT', [";; }", 1133, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; }", 1133, 0], _310864)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1133, 0], _310864)
   Call: (271) [apply] apply:maplist_([";; }", 1133, 0], _310864, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; }", 1133, 0], [_313682|_313684], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; }", _313682)
^  Unify: (272) [user] mfix_vars1(";; }", _313682)
   Call: (273) [system] var(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _313682)
^  Unify: (272) [user] mfix_vars1(";; }", '$VAR'(_318328))
   Call: (273) [system] atom(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _313682)
^  Unify: (272) [user] mfix_vars1(";; }", _313682)
   Call: (273) [system] ";; }"==true
^  Redo: (272) [user] mfix_vars1(";; }", _313682)
^  Unify: (272) [user] mfix_vars1(";; }", _313682)
   Call: (273) [system] ";; }"==false
^  Redo: (272) [user] mfix_vars1(";; }", _313682)
^  Unify: (272) [user] mfix_vars1(";; }", _313682)
   Call: (273) [system] ";; }"==[_327608, _327614]
^  Redo: (272) [user] mfix_vars1(";; }", _313682)
^  Unify: (272) [user] mfix_vars1(";; }", _313682)
   Call: (273) [system] is_list(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _313682)
^  Unify: (272) [user] mfix_vars1(";; }", _313682)
   Call: (273) [system] string(";; }")
   Exit: (273) [system] string(";; }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; }", _313682)
^  Unify: (272) [user] mfix_vars1(";; }", _313682)
   Call: (273) [system] compound(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _313682)
^  Unify: (272) [user] mfix_vars1(";; }", _313682)
^  Call: (273) [user] symbol(";; }")
^  Unify: (273) [user] symbol(";; }")
   Call: (274) [system] atom(";; }")
   Fail: (274) [system] atom(";; }")
^  Fail: (273) [user] symbol(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _313682)
   Call: (273) [system] ";; }"=_313682
   Exit: (273) [system] ";; }"=";; }"
^  Exit: (272) [user] mfix_vars1(";; }", ";; }")
   Call: (272) [apply] apply:maplist_([1133, 0], _313684, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1133, 0], [_351680|_351682], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1133, _351680)
^  Unify: (273) [user] mfix_vars1(1133, _351680)
   Call: (274) [system] var(1133)
^  Redo: (273) [user] mfix_vars1(1133, _351680)
^  Unify: (273) [user] mfix_vars1(1133, '$VAR'(_356326))
   Call: (274) [system] atom(1133)
^  Redo: (273) [user] mfix_vars1(1133, _351680)
^  Unify: (273) [user] mfix_vars1(1133, _351680)
   Call: (274) [system] 1133==true
^  Redo: (273) [user] mfix_vars1(1133, _351680)
^  Unify: (273) [user] mfix_vars1(1133, _351680)
   Call: (274) [system] 1133==false
^  Redo: (273) [user] mfix_vars1(1133, _351680)
^  Unify: (273) [user] mfix_vars1(1133, _351680)
   Call: (274) [system] 1133==[_365606, _365612]
^  Redo: (273) [user] mfix_vars1(1133, _351680)
^  Unify: (273) [user] mfix_vars1(1133, _351680)
   Call: (274) [system] is_list(1133)
^  Redo: (273) [user] mfix_vars1(1133, _351680)
^  Unify: (273) [user] mfix_vars1(1133, _351680)
   Call: (274) [system] string(1133)
^  Redo: (273) [user] mfix_vars1(1133, _351680)
^  Unify: (273) [user] mfix_vars1(1133, _351680)
   Call: (274) [system] compound(1133)
^  Redo: (273) [user] mfix_vars1(1133, _351680)
^  Unify: (273) [user] mfix_vars1(1133, _351680)
^  Call: (274) [user] symbol(1133)
^  Unify: (274) [user] symbol(1133)
   Call: (275) [system] atom(1133)
   Fail: (275) [system] atom(1133)
^  Fail: (274) [user] symbol(1133)
^  Redo: (273) [user] mfix_vars1(1133, _351680)
   Call: (274) [system] 1133=_351680
   Exit: (274) [system] 1133=1133
^  Exit: (273) [user] mfix_vars1(1133, 1133)
   Call: (273) [apply] apply:maplist_([0], _351682, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_386006|_386008], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _386006)
^  Unify: (274) [user] mfix_vars1(0, _386006)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _386006)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_390652))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _386006)
^  Unify: (274) [user] mfix_vars1(0, _386006)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _386006)
^  Unify: (274) [user] mfix_vars1(0, _386006)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _386006)
^  Unify: (274) [user] mfix_vars1(0, _386006)
   Call: (275) [system] 0==[_399932, _399938]
^  Redo: (274) [user] mfix_vars1(0, _386006)
^  Unify: (274) [user] mfix_vars1(0, _386006)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _386006)
^  Unify: (274) [user] mfix_vars1(0, _386006)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _386006)
^  Unify: (274) [user] mfix_vars1(0, _386006)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _386006)
^  Unify: (274) [user] mfix_vars1(0, _386006)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _386006)
   Call: (275) [system] 0=_386006
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _386008, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1133, 0], [1133, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; }", 1133, 0], [";; }", 1133, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1133, 0], [";; }", 1133, 0])
   Call: (270) [system] compound_name_arguments(_280180, '$COMMENT', [";; }", 1133, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1133, 0), '$COMMENT', [";; }", 1133, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1133, 0)\=@='$COMMENT'(";; }", 1133, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1133, 0), _274594)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; }", 1133, 0), _436180))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1133, 0), _436180))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1133, 0), _436180))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1133, 0), _436180))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1133, 0), _436180)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1133, 0), _436180)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; }", 1133, 0), _441766))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1133, 0), _441766))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; }", 1133, 0), _441766)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1133, 0), _441766)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; }", 1133, 0), _441766)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1133, 0)\=@='$COMMENT'(";; }", 1133, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1133, 0), _436180)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; }", 1133, 0), _268982))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1133, 0), _268982))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1133, 0), _268982))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1133, 0), _268982))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1133, 0), _268982)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1133, 0), _268982)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; }", 1133, 0), _464086))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1133, 0), _464086))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; }", 1133, 0), _464086)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1133, 0), _464086)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; }", 1133, 0), _464086)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1133, 0)\=@='$COMMENT'(";; }", 1133, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1133, 0), _268982)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0)))
   Call: (261) [system] '$COMMENT'(";; }", 1133, 0)\=@='$COMMENT'(";; }", 1133, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1133, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1133, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1133, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1133, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1133, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; }", 1133, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; }", 1133, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; }", 1133, 0), _492864, [], _492866)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; }", 1133, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1133, 0), _492864, [], _492866)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1133, 0), _492864, [], _492866)
   Call: (258) [system] atom('$COMMENT'(";; }", 1133, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1133, 0), _492864, [], _492866)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1133, 0), _492864, [], _492866)
   Call: (258) [system] compound('$COMMENT'(";; }", 1133, 0))
   Exit: (258) [system] compound('$COMMENT'(";; }", 1133, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1133, 0), _502180, _502182)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1133, 0), '$COMMENT', [";; }", 1133, 0])
^  Call: (258) [user] subst_vars([";; }", 1133, 0], _504066, [], _492866)
^  Unify: (258) [user] subst_vars([";; }", 1133, 0], [";; }", 1133, 0], [], [])
   Call: (259) [system] var([";; }", 1133, 0])
^  Redo: (258) [user] subst_vars([";; }", 1133, 0], _504066, [], _492866)
^  Unify: (258) [user] subst_vars([";; }", 1133, 0], [_507802|_507804], [], _492866)
^  Call: (259) [user] subst_vars(";; }", _507802, [], _508742)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
   Call: (260) [system] var(";; }")
^  Redo: (259) [user] subst_vars(";; }", _507802, [], _508742)
^  Unify: (259) [user] subst_vars(";; }", _507802, [], _508742)
   Call: (260) [system] atom(";; }")
^  Redo: (259) [user] subst_vars(";; }", _507802, [], _508742)
^  Unify: (259) [user] subst_vars(";; }", _507802, [], _508742)
   Call: (260) [system] compound(";; }")
^  Redo: (259) [user] subst_vars(";; }", _507802, [], _508742)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Exit: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Call: (259) [user] subst_vars([1133, 0], _507804, [], _492866)
^  Unify: (259) [user] subst_vars([1133, 0], [1133, 0], [], [])
   Call: (260) [system] var([1133, 0])
^  Redo: (259) [user] subst_vars([1133, 0], _507804, [], _492866)
^  Unify: (259) [user] subst_vars([1133, 0], [_5976|_5978], [], _5938)
^  Call: (260) [user] subst_vars(1133, _5976, [], _6654)
^  Unify: (260) [user] subst_vars(1133, 1133, [], [])
   Call: (261) [system] var(1133)
^  Redo: (260) [user] subst_vars(1133, _5976, [], _6654)
^  Unify: (260) [user] subst_vars(1133, _5976, [], _6654)
   Call: (261) [system] atom(1133)
^  Redo: (260) [user] subst_vars(1133, _5976, [], _6654)
^  Unify: (260) [user] subst_vars(1133, _5976, [], _6654)
   Call: (261) [system] compound(1133)
^  Redo: (260) [user] subst_vars(1133, _5976, [], _6654)
^  Unify: (260) [user] subst_vars(1133, 1133, [], [])
^  Exit: (260) [user] subst_vars(1133, 1133, [], [])
^  Call: (260) [user] subst_vars([0], _5978, [], _5938)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _5978, [], _5938)
^  Unify: (260) [user] subst_vars([0], [_21586|_21588], [], _5938)
^  Call: (261) [user] subst_vars(0, _21586, [], _22526)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _21586, [], _22526)
^  Unify: (261) [user] subst_vars(0, _21586, [], _22526)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _21586, [], _22526)
^  Unify: (261) [user] subst_vars(0, _21586, [], _22526)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _21586, [], _22526)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _21588, [], _5938)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _21588, [], _5938)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1133, 0], [1133, 0], [], [])
^  Exit: (258) [user] subst_vars([";; }", 1133, 0], [";; }", 1133, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5936, '$COMMENT', [";; }", 1133, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1133, 0), '$COMMENT', [";; }", 1133, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; }", 1133, 0), '$COMMENT'(";; }", 1133, 0), [], [])
   Call: (257) [system] _44944=metta_file_buffer(+, '$COMMENT'(";; }", 1133, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; }", 1133, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; }", 1133, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1133, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1133, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1133, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1133, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1133, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1133, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1135, 0, 41680, '$COMMENT'(";; Converted:", 1135, 0), '$stream_position'(41680, 1135, 0, 41680)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1135, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1135, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1135, 0), _97662))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1135, 0), _97662))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1135, 0), _97662)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1135, 0), _97662)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1135, 0), _97662)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1135, 0), _97662)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1135, 0), _103274))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1135, 0), _103274))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1135, 0), _103274))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1135, 0), _103274))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1135, 0), _103274)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1135, 0), _103274)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1135, 0), _108860))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1135, 0), _108860))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1135, 0), _108860)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1135, 0), _108860)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1135, 0), _108860)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1135, 0), _108860)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1135, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1135, 0), _108860)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1135, 0), '$VAR'(_116320))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1135, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1135, 0), _108860)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1135, 0), _108860)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1135, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1135, 0), _108860)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1135, 0), _108860)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1135, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1135, 0), _108860)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1135, 0), _108860)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1135, 0)==[_125600, _125606]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1135, 0), _108860)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1135, 0), _108860)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1135, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1135, 0), _108860)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1135, 0), _108860)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1135, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1135, 0), _108860)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1135, 0), _108860)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1135, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1135, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1135, 0), _135802, _135804)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1135, 0), '$COMMENT', [";; Converted:", 1135, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1135, 0], _139544)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1135, 0], _139544)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1135, 0], _139544, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1135, 0], [_142362|_142364], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _142362)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _142362)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _142362)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_147008))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _142362)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _142362)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _142362)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _142362)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _142362)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _142362)
   Call: (273) [system] ";; Converted:"==[_156288, _156294]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _142362)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _142362)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _142362)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _142362)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _142362)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _142362)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _142362)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _142362)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _142362)
   Call: (273) [system] ";; Converted:"=_142362
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1135, 0], _142364, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1135, 0], [_180360|_180362], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1135, _180360)
^  Unify: (273) [user] mfix_vars1(1135, _180360)
   Call: (274) [system] var(1135)
^  Redo: (273) [user] mfix_vars1(1135, _180360)
^  Unify: (273) [user] mfix_vars1(1135, '$VAR'(_185006))
   Call: (274) [system] atom(1135)
^  Redo: (273) [user] mfix_vars1(1135, _180360)
^  Unify: (273) [user] mfix_vars1(1135, _180360)
   Call: (274) [system] 1135==true
^  Redo: (273) [user] mfix_vars1(1135, _180360)
^  Unify: (273) [user] mfix_vars1(1135, _180360)
   Call: (274) [system] 1135==false
^  Redo: (273) [user] mfix_vars1(1135, _180360)
^  Unify: (273) [user] mfix_vars1(1135, _180360)
   Call: (274) [system] 1135==[_194286, _194292]
^  Redo: (273) [user] mfix_vars1(1135, _180360)
^  Unify: (273) [user] mfix_vars1(1135, _180360)
   Call: (274) [system] is_list(1135)
^  Redo: (273) [user] mfix_vars1(1135, _180360)
^  Unify: (273) [user] mfix_vars1(1135, _180360)
   Call: (274) [system] string(1135)
^  Redo: (273) [user] mfix_vars1(1135, _180360)
^  Unify: (273) [user] mfix_vars1(1135, _180360)
   Call: (274) [system] compound(1135)
^  Redo: (273) [user] mfix_vars1(1135, _180360)
^  Unify: (273) [user] mfix_vars1(1135, _180360)
^  Call: (274) [user] symbol(1135)
^  Unify: (274) [user] symbol(1135)
   Call: (275) [system] atom(1135)
   Fail: (275) [system] atom(1135)
^  Fail: (274) [user] symbol(1135)
^  Redo: (273) [user] mfix_vars1(1135, _180360)
   Call: (274) [system] 1135=_180360
   Exit: (274) [system] 1135=1135
^  Exit: (273) [user] mfix_vars1(1135, 1135)
   Call: (273) [apply] apply:maplist_([0], _180362, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_214686|_214688], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _214686)
^  Unify: (274) [user] mfix_vars1(0, _214686)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _214686)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_219332))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _214686)
^  Unify: (274) [user] mfix_vars1(0, _214686)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _214686)
^  Unify: (274) [user] mfix_vars1(0, _214686)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _214686)
^  Unify: (274) [user] mfix_vars1(0, _214686)
   Call: (275) [system] 0==[_228612, _228618]
^  Redo: (274) [user] mfix_vars1(0, _214686)
^  Unify: (274) [user] mfix_vars1(0, _214686)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _214686)
^  Unify: (274) [user] mfix_vars1(0, _214686)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _214686)
^  Unify: (274) [user] mfix_vars1(0, _214686)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _214686)
^  Unify: (274) [user] mfix_vars1(0, _214686)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _214686)
   Call: (275) [system] 0=_214686
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _214688, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1135, 0], [1135, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1135, 0], [";; Converted:", 1135, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1135, 0], [";; Converted:", 1135, 0])
   Call: (270) [system] compound_name_arguments(_108860, '$COMMENT', [";; Converted:", 1135, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1135, 0), '$COMMENT', [";; Converted:", 1135, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1135, 0)\=@='$COMMENT'(";; Converted:", 1135, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1135, 0), _103274)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1135, 0), _264860))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1135, 0), _264860))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1135, 0), _264860))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1135, 0), _264860))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1135, 0), _264860)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1135, 0), _264860)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1135, 0), _270446))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1135, 0), _270446))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1135, 0), _270446)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1135, 0), _270446)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1135, 0), _270446)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1135, 0)\=@='$COMMENT'(";; Converted:", 1135, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1135, 0), _264860)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1135, 0), _97662))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1135, 0), _97662))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1135, 0), _97662))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1135, 0), _97662))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1135, 0), _97662)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1135, 0), _97662)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1135, 0), _292766))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1135, 0), _292766))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1135, 0), _292766)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1135, 0), _292766)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1135, 0), _292766)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1135, 0)\=@='$COMMENT'(";; Converted:", 1135, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1135, 0), _97662)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1135, 0)\=@='$COMMENT'(";; Converted:", 1135, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1135, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1135, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1135, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1135, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1135, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1135, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1135, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1135, 0), _321544, [], _321546)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1135, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1135, 0), _321544, [], _321546)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1135, 0), _321544, [], _321546)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1135, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1135, 0), _321544, [], _321546)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1135, 0), _321544, [], _321546)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1135, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1135, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1135, 0), _330860, _330862)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1135, 0), '$COMMENT', [";; Converted:", 1135, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1135, 0], _332746, [], _321546)
^  Unify: (258) [user] subst_vars([";; Converted:", 1135, 0], [";; Converted:", 1135, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1135, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1135, 0], _332746, [], _321546)
^  Unify: (258) [user] subst_vars([";; Converted:", 1135, 0], [_336482|_336484], [], _321546)
^  Call: (259) [user] subst_vars(";; Converted:", _336482, [], _337422)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _336482, [], _337422)
^  Unify: (259) [user] subst_vars(";; Converted:", _336482, [], _337422)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _336482, [], _337422)
^  Unify: (259) [user] subst_vars(";; Converted:", _336482, [], _337422)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _336482, [], _337422)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1135, 0], _336484, [], _321546)
^  Unify: (259) [user] subst_vars([1135, 0], [1135, 0], [], [])
   Call: (260) [system] var([1135, 0])
^  Redo: (259) [user] subst_vars([1135, 0], _336484, [], _321546)
^  Unify: (259) [user] subst_vars([1135, 0], [_352354|_352356], [], _321546)
^  Call: (260) [user] subst_vars(1135, _352354, [], _353294)
^  Unify: (260) [user] subst_vars(1135, 1135, [], [])
   Call: (261) [system] var(1135)
^  Redo: (260) [user] subst_vars(1135, _352354, [], _353294)
^  Unify: (260) [user] subst_vars(1135, _352354, [], _353294)
   Call: (261) [system] atom(1135)
^  Redo: (260) [user] subst_vars(1135, _352354, [], _353294)
^  Unify: (260) [user] subst_vars(1135, _352354, [], _353294)
   Call: (261) [system] compound(1135)
^  Redo: (260) [user] subst_vars(1135, _352354, [], _353294)
^  Unify: (260) [user] subst_vars(1135, 1135, [], [])
^  Exit: (260) [user] subst_vars(1135, 1135, [], [])
^  Call: (260) [user] subst_vars([0], _352356, [], _321546)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _352356, [], _321546)
^  Unify: (260) [user] subst_vars([0], [_368226|_368228], [], _321546)
^  Call: (261) [user] subst_vars(0, _368226, [], _369166)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _368226, [], _369166)
^  Unify: (261) [user] subst_vars(0, _368226, [], _369166)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _368226, [], _369166)
^  Unify: (261) [user] subst_vars(0, _368226, [], _369166)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _368226, [], _369166)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _368228, [], _321546)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _368228, [], _321546)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1135, 0], [1135, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1135, 0], [";; Converted:", 1135, 0], [], [])
   Call: (258) [system] compound_name_arguments(_321544, '$COMMENT', [";; Converted:", 1135, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1135, 0), '$COMMENT', [";; Converted:", 1135, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1135, 0), '$COMMENT'(";; Converted:", 1135, 0), [], [])
   Call: (257) [system] _391584=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1135, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1135, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1135, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1135, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1135, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1135, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1135, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1135, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1135, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1142, 0, 41906, '$COMMENT'(";; Original:", 1142, 0), '$stream_position'(41906, 1142, 0, 41906)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1142, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1142, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1142, 0), _444302))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1142, 0), _444302))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1142, 0), _444302)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1142, 0), _444302)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1142, 0), _444302)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1142, 0), _444302)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1142, 0), _449914))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1142, 0), _449914))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1142, 0), _449914))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1142, 0), _449914))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1142, 0), _449914)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1142, 0), _449914)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1142, 0), _455500))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1142, 0), _455500))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1142, 0), _455500)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1142, 0), _455500)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1142, 0), _455500)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1142, 0), _455500)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1142, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1142, 0), _455500)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1142, 0), '$VAR'(_462960))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1142, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1142, 0), _455500)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1142, 0), _455500)
   Call: (270) [system] '$COMMENT'(";; Original:", 1142, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1142, 0), _455500)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1142, 0), _455500)
   Call: (270) [system] '$COMMENT'(";; Original:", 1142, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1142, 0), _455500)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1142, 0), _455500)
   Call: (270) [system] '$COMMENT'(";; Original:", 1142, 0)==[_472240, _472246]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1142, 0), _455500)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1142, 0), _455500)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1142, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1142, 0), _455500)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1142, 0), _455500)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1142, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1142, 0), _455500)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1142, 0), _455500)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1142, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1142, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1142, 0), _482442, _482444)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1142, 0), '$COMMENT', [";; Original:", 1142, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1142, 0], _486184)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1142, 0], _486184)
   Call: (271) [apply] apply:maplist_([";; Original:", 1142, 0], _486184, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1142, 0], [_489002|_489004], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _489002)
^  Unify: (272) [user] mfix_vars1(";; Original:", _489002)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _489002)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_493648))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _489002)
^  Unify: (272) [user] mfix_vars1(";; Original:", _489002)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _489002)
^  Unify: (272) [user] mfix_vars1(";; Original:", _489002)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _489002)
^  Unify: (272) [user] mfix_vars1(";; Original:", _489002)
   Call: (273) [system] ";; Original:"==[_502928, _502934]
^  Redo: (272) [user] mfix_vars1(";; Original:", _489002)
^  Unify: (272) [user] mfix_vars1(";; Original:", _489002)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _489002)
^  Unify: (272) [user] mfix_vars1(";; Original:", _489002)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _489002)
^  Unify: (272) [user] mfix_vars1(";; Original:", _489002)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _489002)
^  Unify: (272) [user] mfix_vars1(";; Original:", _489002)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _489002)
   Call: (273) [system] ";; Original:"=_489002
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1142, 0], _6026, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1142, 0], [_8820|_8822], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1142, _8820)
^  Unify: (273) [user] mfix_vars1(1142, _8820)
   Call: (274) [system] var(1142)
^  Redo: (273) [user] mfix_vars1(1142, _8820)
^  Unify: (273) [user] mfix_vars1(1142, '$VAR'(_13466))
   Call: (274) [system] atom(1142)
^  Redo: (273) [user] mfix_vars1(1142, _8820)
^  Unify: (273) [user] mfix_vars1(1142, _8820)
   Call: (274) [system] 1142==true
^  Redo: (273) [user] mfix_vars1(1142, _8820)
^  Unify: (273) [user] mfix_vars1(1142, _8820)
   Call: (274) [system] 1142==false
^  Redo: (273) [user] mfix_vars1(1142, _8820)
^  Unify: (273) [user] mfix_vars1(1142, _8820)
   Call: (274) [system] 1142==[_22746, _22752]
^  Redo: (273) [user] mfix_vars1(1142, _8820)
^  Unify: (273) [user] mfix_vars1(1142, _8820)
   Call: (274) [system] is_list(1142)
^  Redo: (273) [user] mfix_vars1(1142, _8820)
^  Unify: (273) [user] mfix_vars1(1142, _8820)
   Call: (274) [system] string(1142)
^  Redo: (273) [user] mfix_vars1(1142, _8820)
^  Unify: (273) [user] mfix_vars1(1142, _8820)
   Call: (274) [system] compound(1142)
^  Redo: (273) [user] mfix_vars1(1142, _8820)
^  Unify: (273) [user] mfix_vars1(1142, _8820)
^  Call: (274) [user] symbol(1142)
^  Unify: (274) [user] symbol(1142)
   Call: (275) [system] atom(1142)
   Fail: (275) [system] atom(1142)
^  Fail: (274) [user] symbol(1142)
^  Redo: (273) [user] mfix_vars1(1142, _8820)
   Call: (274) [system] 1142=_8820
   Exit: (274) [system] 1142=1142
^  Exit: (273) [user] mfix_vars1(1142, 1142)
   Call: (273) [apply] apply:maplist_([0], _8822, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_43146|_43148], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _43146)
^  Unify: (274) [user] mfix_vars1(0, _43146)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _43146)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_47792))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _43146)
^  Unify: (274) [user] mfix_vars1(0, _43146)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _43146)
^  Unify: (274) [user] mfix_vars1(0, _43146)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _43146)
^  Unify: (274) [user] mfix_vars1(0, _43146)
   Call: (275) [system] 0==[_57072, _57078]
^  Redo: (274) [user] mfix_vars1(0, _43146)
^  Unify: (274) [user] mfix_vars1(0, _43146)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _43146)
^  Unify: (274) [user] mfix_vars1(0, _43146)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _43146)
^  Unify: (274) [user] mfix_vars1(0, _43146)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _43146)
^  Unify: (274) [user] mfix_vars1(0, _43146)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _43146)
   Call: (275) [system] 0=_43146
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _43148, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1142, 0], [1142, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1142, 0], [";; Original:", 1142, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1142, 0], [";; Original:", 1142, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";; Original:", 1142, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1142, 0), '$COMMENT', [";; Original:", 1142, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1142, 0)\=@='$COMMENT'(";; Original:", 1142, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1142, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1142, 0), _93320))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1142, 0), _93320))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1142, 0), _93320))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1142, 0), _93320))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1142, 0), _93320)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1142, 0), _93320)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1142, 0), _98906))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1142, 0), _98906))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1142, 0), _98906)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1142, 0), _98906)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1142, 0), _98906)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1142, 0)\=@='$COMMENT'(";; Original:", 1142, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1142, 0), _93320)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1142, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1142, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1142, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1142, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1142, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1142, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1142, 0), _121226))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1142, 0), _121226))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1142, 0), _121226)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1142, 0), _121226)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1142, 0), _121226)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1142, 0)\=@='$COMMENT'(";; Original:", 1142, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1142, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1142, 0)\=@='$COMMENT'(";; Original:", 1142, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1142, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1142, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1142, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1142, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1142, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1142, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1142, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1142, 0), _150004, [], _150006)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1142, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1142, 0), _150004, [], _150006)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1142, 0), _150004, [], _150006)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1142, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1142, 0), _150004, [], _150006)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1142, 0), _150004, [], _150006)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1142, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1142, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1142, 0), _159320, _159322)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1142, 0), '$COMMENT', [";; Original:", 1142, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1142, 0], _161206, [], _150006)
^  Unify: (258) [user] subst_vars([";; Original:", 1142, 0], [";; Original:", 1142, 0], [], [])
   Call: (259) [system] var([";; Original:", 1142, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1142, 0], _161206, [], _150006)
^  Unify: (258) [user] subst_vars([";; Original:", 1142, 0], [_164942|_164944], [], _150006)
^  Call: (259) [user] subst_vars(";; Original:", _164942, [], _165882)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _164942, [], _165882)
^  Unify: (259) [user] subst_vars(";; Original:", _164942, [], _165882)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _164942, [], _165882)
^  Unify: (259) [user] subst_vars(";; Original:", _164942, [], _165882)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _164942, [], _165882)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1142, 0], _164944, [], _150006)
^  Unify: (259) [user] subst_vars([1142, 0], [1142, 0], [], [])
   Call: (260) [system] var([1142, 0])
^  Redo: (259) [user] subst_vars([1142, 0], _164944, [], _150006)
^  Unify: (259) [user] subst_vars([1142, 0], [_180814|_180816], [], _150006)
^  Call: (260) [user] subst_vars(1142, _180814, [], _181754)
^  Unify: (260) [user] subst_vars(1142, 1142, [], [])
   Call: (261) [system] var(1142)
^  Redo: (260) [user] subst_vars(1142, _180814, [], _181754)
^  Unify: (260) [user] subst_vars(1142, _180814, [], _181754)
   Call: (261) [system] atom(1142)
^  Redo: (260) [user] subst_vars(1142, _180814, [], _181754)
^  Unify: (260) [user] subst_vars(1142, _180814, [], _181754)
   Call: (261) [system] compound(1142)
^  Redo: (260) [user] subst_vars(1142, _180814, [], _181754)
^  Unify: (260) [user] subst_vars(1142, 1142, [], [])
^  Exit: (260) [user] subst_vars(1142, 1142, [], [])
^  Call: (260) [user] subst_vars([0], _180816, [], _150006)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _180816, [], _150006)
^  Unify: (260) [user] subst_vars([0], [_196686|_196688], [], _150006)
^  Call: (261) [user] subst_vars(0, _196686, [], _197626)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _196686, [], _197626)
^  Unify: (261) [user] subst_vars(0, _196686, [], _197626)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _196686, [], _197626)
^  Unify: (261) [user] subst_vars(0, _196686, [], _197626)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _196686, [], _197626)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _196688, [], _150006)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _196688, [], _150006)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1142, 0], [1142, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1142, 0], [";; Original:", 1142, 0], [], [])
   Call: (258) [system] compound_name_arguments(_150004, '$COMMENT', [";; Original:", 1142, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1142, 0), '$COMMENT', [";; Original:", 1142, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1142, 0), '$COMMENT'(";; Original:", 1142, 0), [], [])
   Call: (257) [system] _220044=metta_file_buffer(+, '$COMMENT'(";; Original:", 1142, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1142, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1142, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1142, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1142, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1142, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1142, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1142, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1142, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1143, 0, 41919, '$COMMENT'(";; #[test]", 1143, 0), '$stream_position'(41919, 1143, 0, 41919)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1143, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1143, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; #[test]", 1143, 0), _272762))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 1143, 0), _272762))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; #[test]", 1143, 0), _272762)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 1143, 0), _272762)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1143, 0), _272762)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1143, 0), _272762)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; #[test]", 1143, 0), _278374))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1143, 0), _278374))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1143, 0), _278374))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1143, 0), _278374))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1143, 0), _278374)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1143, 0), _278374)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; #[test]", 1143, 0), _283960))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 1143, 0), _283960))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; #[test]", 1143, 0), _283960)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 1143, 0), _283960)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1143, 0), _283960)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1143, 0), _283960)
   Call: (270) [system] var('$COMMENT'(";; #[test]", 1143, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1143, 0), _283960)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1143, 0), '$VAR'(_291420))
   Call: (270) [system] atom('$COMMENT'(";; #[test]", 1143, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1143, 0), _283960)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1143, 0), _283960)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1143, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1143, 0), _283960)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1143, 0), _283960)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1143, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1143, 0), _283960)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1143, 0), _283960)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1143, 0)==[_300700, _300706]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1143, 0), _283960)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1143, 0), _283960)
   Call: (270) [system] is_list('$COMMENT'(";; #[test]", 1143, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1143, 0), _283960)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1143, 0), _283960)
   Call: (270) [system] string('$COMMENT'(";; #[test]", 1143, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1143, 0), _283960)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1143, 0), _283960)
   Call: (270) [system] compound('$COMMENT'(";; #[test]", 1143, 0))
   Exit: (270) [system] compound('$COMMENT'(";; #[test]", 1143, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1143, 0), _310902, _310904)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1143, 0), '$COMMENT', [";; #[test]", 1143, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; #[test]", 1143, 0], _314644)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 1143, 0], _314644)
   Call: (271) [apply] apply:maplist_([";; #[test]", 1143, 0], _314644, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; #[test]", 1143, 0], [_317462|_317464], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; #[test]", _317462)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _317462)
   Call: (273) [system] var(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _317462)
^  Unify: (272) [user] mfix_vars1(";; #[test]", '$VAR'(_322108))
   Call: (273) [system] atom(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _317462)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _317462)
   Call: (273) [system] ";; #[test]"==true
^  Redo: (272) [user] mfix_vars1(";; #[test]", _317462)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _317462)
   Call: (273) [system] ";; #[test]"==false
^  Redo: (272) [user] mfix_vars1(";; #[test]", _317462)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _317462)
   Call: (273) [system] ";; #[test]"==[_331388, _331394]
^  Redo: (272) [user] mfix_vars1(";; #[test]", _317462)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _317462)
   Call: (273) [system] is_list(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _317462)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _317462)
   Call: (273) [system] string(";; #[test]")
   Exit: (273) [system] string(";; #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; #[test]", _317462)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _317462)
   Call: (273) [system] compound(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _317462)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _317462)
^  Call: (273) [user] symbol(";; #[test]")
^  Unify: (273) [user] symbol(";; #[test]")
   Call: (274) [system] atom(";; #[test]")
   Fail: (274) [system] atom(";; #[test]")
^  Fail: (273) [user] symbol(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _317462)
   Call: (273) [system] ";; #[test]"=_317462
   Exit: (273) [system] ";; #[test]"=";; #[test]"
^  Exit: (272) [user] mfix_vars1(";; #[test]", ";; #[test]")
   Call: (272) [apply] apply:maplist_([1143, 0], _317464, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1143, 0], [_355460|_355462], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1143, _355460)
^  Unify: (273) [user] mfix_vars1(1143, _355460)
   Call: (274) [system] var(1143)
^  Redo: (273) [user] mfix_vars1(1143, _355460)
^  Unify: (273) [user] mfix_vars1(1143, '$VAR'(_360106))
   Call: (274) [system] atom(1143)
^  Redo: (273) [user] mfix_vars1(1143, _355460)
^  Unify: (273) [user] mfix_vars1(1143, _355460)
   Call: (274) [system] 1143==true
^  Redo: (273) [user] mfix_vars1(1143, _355460)
^  Unify: (273) [user] mfix_vars1(1143, _355460)
   Call: (274) [system] 1143==false
^  Redo: (273) [user] mfix_vars1(1143, _355460)
^  Unify: (273) [user] mfix_vars1(1143, _355460)
   Call: (274) [system] 1143==[_369386, _369392]
^  Redo: (273) [user] mfix_vars1(1143, _355460)
^  Unify: (273) [user] mfix_vars1(1143, _355460)
   Call: (274) [system] is_list(1143)
^  Redo: (273) [user] mfix_vars1(1143, _355460)
^  Unify: (273) [user] mfix_vars1(1143, _355460)
   Call: (274) [system] string(1143)
^  Redo: (273) [user] mfix_vars1(1143, _355460)
^  Unify: (273) [user] mfix_vars1(1143, _355460)
   Call: (274) [system] compound(1143)
^  Redo: (273) [user] mfix_vars1(1143, _355460)
^  Unify: (273) [user] mfix_vars1(1143, _355460)
^  Call: (274) [user] symbol(1143)
^  Unify: (274) [user] symbol(1143)
   Call: (275) [system] atom(1143)
   Fail: (275) [system] atom(1143)
^  Fail: (274) [user] symbol(1143)
^  Redo: (273) [user] mfix_vars1(1143, _355460)
   Call: (274) [system] 1143=_355460
   Exit: (274) [system] 1143=1143
^  Exit: (273) [user] mfix_vars1(1143, 1143)
   Call: (273) [apply] apply:maplist_([0], _355462, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_389786|_389788], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _389786)
^  Unify: (274) [user] mfix_vars1(0, _389786)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _389786)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_394432))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _389786)
^  Unify: (274) [user] mfix_vars1(0, _389786)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _389786)
^  Unify: (274) [user] mfix_vars1(0, _389786)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _389786)
^  Unify: (274) [user] mfix_vars1(0, _389786)
   Call: (275) [system] 0==[_403712, _403718]
^  Redo: (274) [user] mfix_vars1(0, _389786)
^  Unify: (274) [user] mfix_vars1(0, _389786)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _389786)
^  Unify: (274) [user] mfix_vars1(0, _389786)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _389786)
^  Unify: (274) [user] mfix_vars1(0, _389786)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _389786)
^  Unify: (274) [user] mfix_vars1(0, _389786)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _389786)
   Call: (275) [system] 0=_389786
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _389788, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1143, 0], [1143, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; #[test]", 1143, 0], [";; #[test]", 1143, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 1143, 0], [";; #[test]", 1143, 0])
   Call: (270) [system] compound_name_arguments(_283960, '$COMMENT', [";; #[test]", 1143, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1143, 0), '$COMMENT', [";; #[test]", 1143, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1143, 0)\=@='$COMMENT'(";; #[test]", 1143, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1143, 0), _278374)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; #[test]", 1143, 0), _439960))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1143, 0), _439960))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1143, 0), _439960))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1143, 0), _439960))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1143, 0), _439960)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1143, 0), _439960)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; #[test]", 1143, 0), _445546))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 1143, 0), _445546))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; #[test]", 1143, 0), _445546)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 1143, 0), _445546)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1143, 0), _445546)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1143, 0)\=@='$COMMENT'(";; #[test]", 1143, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1143, 0), _439960)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; #[test]", 1143, 0), _272762))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1143, 0), _272762))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1143, 0), _272762))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1143, 0), _272762))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1143, 0), _272762)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1143, 0), _272762)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; #[test]", 1143, 0), _467866))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 1143, 0), _467866))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; #[test]", 1143, 0), _467866)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 1143, 0), _467866)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1143, 0), _467866)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1143, 0)\=@='$COMMENT'(";; #[test]", 1143, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1143, 0), _272762)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0)))
   Call: (261) [system] '$COMMENT'(";; #[test]", 1143, 0)\=@='$COMMENT'(";; #[test]", 1143, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1143, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1143, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1143, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1143, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1143, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1143, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1143, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1143, 0), _496644, [], _496646)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; #[test]", 1143, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1143, 0), _496644, [], _496646)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1143, 0), _496644, [], _496646)
   Call: (258) [system] atom('$COMMENT'(";; #[test]", 1143, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1143, 0), _496644, [], _496646)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1143, 0), _496644, [], _496646)
   Call: (258) [system] compound('$COMMENT'(";; #[test]", 1143, 0))
   Exit: (258) [system] compound('$COMMENT'(";; #[test]", 1143, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1143, 0), _505960, _505962)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1143, 0), '$COMMENT', [";; #[test]", 1143, 0])
^  Call: (258) [user] subst_vars([";; #[test]", 1143, 0], _507846, [], _496646)
^  Unify: (258) [user] subst_vars([";; #[test]", 1143, 0], [";; #[test]", 1143, 0], [], [])
   Call: (259) [system] var([";; #[test]", 1143, 0])
^  Redo: (258) [user] subst_vars([";; #[test]", 1143, 0], _507846, [], _496646)
^  Unify: (258) [user] subst_vars([";; #[test]", 1143, 0], [_511582|_511584], [], _496646)
^  Call: (259) [user] subst_vars(";; #[test]", _511582, [], _512522)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
   Call: (260) [system] var(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _511582, [], _512522)
^  Unify: (259) [user] subst_vars(";; #[test]", _511582, [], _512522)
   Call: (260) [system] atom(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _511582, [], _512522)
^  Unify: (259) [user] subst_vars(";; #[test]", _511582, [], _512522)
   Call: (260) [system] compound(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _511582, [], _512522)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Exit: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Call: (259) [user] subst_vars([1143, 0], _5970, [], _5940)
^  Unify: (259) [user] subst_vars([1143, 0], [1143, 0], [], [])
   Call: (260) [system] var([1143, 0])
^  Redo: (259) [user] subst_vars([1143, 0], _5970, [], _5940)
^  Unify: (259) [user] subst_vars([1143, 0], [_9486|_9488], [], _5940)
^  Call: (260) [user] subst_vars(1143, _9486, [], _10426)
^  Unify: (260) [user] subst_vars(1143, 1143, [], [])
   Call: (261) [system] var(1143)
^  Redo: (260) [user] subst_vars(1143, _9486, [], _10426)
^  Unify: (260) [user] subst_vars(1143, _9486, [], _10426)
   Call: (261) [system] atom(1143)
^  Redo: (260) [user] subst_vars(1143, _9486, [], _10426)
^  Unify: (260) [user] subst_vars(1143, _9486, [], _10426)
   Call: (261) [system] compound(1143)
^  Redo: (260) [user] subst_vars(1143, _9486, [], _10426)
^  Unify: (260) [user] subst_vars(1143, 1143, [], [])
^  Exit: (260) [user] subst_vars(1143, 1143, [], [])
^  Call: (260) [user] subst_vars([0], _9488, [], _5940)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _9488, [], _5940)
^  Unify: (260) [user] subst_vars([0], [_25358|_25360], [], _5940)
^  Call: (261) [user] subst_vars(0, _25358, [], _26298)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _25358, [], _26298)
^  Unify: (261) [user] subst_vars(0, _25358, [], _26298)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _25358, [], _26298)
^  Unify: (261) [user] subst_vars(0, _25358, [], _26298)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _25358, [], _26298)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _25360, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _25360, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1143, 0], [1143, 0], [], [])
^  Exit: (258) [user] subst_vars([";; #[test]", 1143, 0], [";; #[test]", 1143, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5938, '$COMMENT', [";; #[test]", 1143, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1143, 0), '$COMMENT', [";; #[test]", 1143, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1143, 0), '$COMMENT'(";; #[test]", 1143, 0), [], [])
   Call: (257) [system] _48716=metta_file_buffer(+, '$COMMENT'(";; #[test]", 1143, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; #[test]", 1143, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; #[test]", 1143, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 1143, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 1143, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1143, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1143, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1143, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1143, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1144, 0, 41930, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$stream_position'(41930, 1144, 0, 41930)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _101444))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _101444))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _101444)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _101444)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _101444)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _101444)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _107056))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _107056))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _107056))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _107056))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _107056)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _107056)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _112642))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _112642))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _112642)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _112642)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _112642)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _112642)
   Call: (270) [system] var('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _112642)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$VAR'(_120102))
   Call: (270) [system] atom('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _112642)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _112642)
   Call: (270) [system] '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _112642)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _112642)
   Call: (270) [system] '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _112642)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _112642)
   Call: (270) [system] '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0)==[_129382, _129388]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _112642)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _112642)
   Call: (270) [system] is_list('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _112642)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _112642)
   Call: (270) [system] string('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _112642)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _112642)
   Call: (270) [system] compound('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
   Exit: (270) [system] compound('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _139584, _139586)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT', [";; fn test_return_incorrect_number_of_args_error() {", 1144, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; fn test_return_incorrect_number_of_args_error() {", 1144, 0], _143326)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn test_return_incorrect_number_of_args_error() {", 1144, 0], _143326)
   Call: (271) [apply] apply:maplist_([";; fn test_return_incorrect_number_of_args_error() {", 1144, 0], _143326, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; fn test_return_incorrect_number_of_args_error() {", 1144, 0], [_146144|_146146], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; fn test_return_incorrect_number_of_args_error() {", _146144)
^  Unify: (272) [user] mfix_vars1(";; fn test_return_incorrect_number_of_args_error() {", _146144)
   Call: (273) [system] var(";; fn test_return_incorrect_number_of_args_error() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_return_incorrect_number_of_args_error() {", _146144)
^  Unify: (272) [user] mfix_vars1(";; fn test_return_incorrect_number_of_args_error() {", '$VAR'(_150790))
   Call: (273) [system] atom(";; fn test_return_incorrect_number_of_args_error() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_return_incorrect_number_of_args_error() {", _146144)
^  Unify: (272) [user] mfix_vars1(";; fn test_return_incorrect_number_of_args_error() {", _146144)
   Call: (273) [system] ";; fn test_return_incorrect_number_of_args_error() {"==true
^  Redo: (272) [user] mfix_vars1(";; fn test_return_incorrect_number_of_args_error() {", _146144)
^  Unify: (272) [user] mfix_vars1(";; fn test_return_incorrect_number_of_args_error() {", _146144)
   Call: (273) [system] ";; fn test_return_incorrect_number_of_args_error() {"==false
^  Redo: (272) [user] mfix_vars1(";; fn test_return_incorrect_number_of_args_error() {", _146144)
^  Unify: (272) [user] mfix_vars1(";; fn test_return_incorrect_number_of_args_error() {", _146144)
   Call: (273) [system] ";; fn test_return_incorrect_number_of_args_error() {"==[_160070, _160076]
^  Redo: (272) [user] mfix_vars1(";; fn test_return_incorrect_number_of_args_error() {", _146144)
^  Unify: (272) [user] mfix_vars1(";; fn test_return_incorrect_number_of_args_error() {", _146144)
   Call: (273) [system] is_list(";; fn test_return_incorrect_number_of_args_error() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_return_incorrect_number_of_args_error() {", _146144)
^  Unify: (272) [user] mfix_vars1(";; fn test_return_incorrect_number_of_args_error() {", _146144)
   Call: (273) [system] string(";; fn test_return_incorrect_number_of_args_error() {")
   Exit: (273) [system] string(";; fn test_return_incorrect_number_of_args_error() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; fn test_return_incorrect_number_of_args_error() {", _146144)
^  Unify: (272) [user] mfix_vars1(";; fn test_return_incorrect_number_of_args_error() {", _146144)
   Call: (273) [system] compound(";; fn test_return_incorrect_number_of_args_error() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_return_incorrect_number_of_args_error() {", _146144)
^  Unify: (272) [user] mfix_vars1(";; fn test_return_incorrect_number_of_args_error() {", _146144)
^  Call: (273) [user] symbol(";; fn test_return_incorrect_number_of_args_error() {")
^  Unify: (273) [user] symbol(";; fn test_return_incorrect_number_of_args_error() {")
   Call: (274) [system] atom(";; fn test_return_incorrect_number_of_args_error() {")
   Fail: (274) [system] atom(";; fn test_return_incorrect_number_of_args_error() {")
^  Fail: (273) [user] symbol(";; fn test_return_incorrect_number_of_args_error() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_return_incorrect_number_of_args_error() {", _146144)
   Call: (273) [system] ";; fn test_return_incorrect_number_of_args_error() {"=_146144
   Exit: (273) [system] ";; fn test_return_incorrect_number_of_args_error() {"=";; fn test_return_incorrect_number_of_args_error() {"
^  Exit: (272) [user] mfix_vars1(";; fn test_return_incorrect_number_of_args_error() {", ";; fn test_return_incorrect_number_of_args_error() {")
   Call: (272) [apply] apply:maplist_([1144, 0], _146146, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1144, 0], [_184142|_184144], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1144, _184142)
^  Unify: (273) [user] mfix_vars1(1144, _184142)
   Call: (274) [system] var(1144)
^  Redo: (273) [user] mfix_vars1(1144, _184142)
^  Unify: (273) [user] mfix_vars1(1144, '$VAR'(_188788))
   Call: (274) [system] atom(1144)
^  Redo: (273) [user] mfix_vars1(1144, _184142)
^  Unify: (273) [user] mfix_vars1(1144, _184142)
   Call: (274) [system] 1144==true
^  Redo: (273) [user] mfix_vars1(1144, _184142)
^  Unify: (273) [user] mfix_vars1(1144, _184142)
   Call: (274) [system] 1144==false
^  Redo: (273) [user] mfix_vars1(1144, _184142)
^  Unify: (273) [user] mfix_vars1(1144, _184142)
   Call: (274) [system] 1144==[_198068, _198074]
^  Redo: (273) [user] mfix_vars1(1144, _184142)
^  Unify: (273) [user] mfix_vars1(1144, _184142)
   Call: (274) [system] is_list(1144)
^  Redo: (273) [user] mfix_vars1(1144, _184142)
^  Unify: (273) [user] mfix_vars1(1144, _184142)
   Call: (274) [system] string(1144)
^  Redo: (273) [user] mfix_vars1(1144, _184142)
^  Unify: (273) [user] mfix_vars1(1144, _184142)
   Call: (274) [system] compound(1144)
^  Redo: (273) [user] mfix_vars1(1144, _184142)
^  Unify: (273) [user] mfix_vars1(1144, _184142)
^  Call: (274) [user] symbol(1144)
^  Unify: (274) [user] symbol(1144)
   Call: (275) [system] atom(1144)
   Fail: (275) [system] atom(1144)
^  Fail: (274) [user] symbol(1144)
^  Redo: (273) [user] mfix_vars1(1144, _184142)
   Call: (274) [system] 1144=_184142
   Exit: (274) [system] 1144=1144
^  Exit: (273) [user] mfix_vars1(1144, 1144)
   Call: (273) [apply] apply:maplist_([0], _184144, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_218468|_218470], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _218468)
^  Unify: (274) [user] mfix_vars1(0, _218468)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _218468)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_223114))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _218468)
^  Unify: (274) [user] mfix_vars1(0, _218468)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _218468)
^  Unify: (274) [user] mfix_vars1(0, _218468)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _218468)
^  Unify: (274) [user] mfix_vars1(0, _218468)
   Call: (275) [system] 0==[_232394, _232400]
^  Redo: (274) [user] mfix_vars1(0, _218468)
^  Unify: (274) [user] mfix_vars1(0, _218468)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _218468)
^  Unify: (274) [user] mfix_vars1(0, _218468)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _218468)
^  Unify: (274) [user] mfix_vars1(0, _218468)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _218468)
^  Unify: (274) [user] mfix_vars1(0, _218468)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _218468)
   Call: (275) [system] 0=_218468
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _218470, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1144, 0], [1144, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; fn test_return_incorrect_number_of_args_error() {", 1144, 0], [";; fn test_return_incorrect_number_of_args_error() {", 1144, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn test_return_incorrect_number_of_args_error() {", 1144, 0], [";; fn test_return_incorrect_number_of_args_error() {", 1144, 0])
   Call: (270) [system] compound_name_arguments(_112642, '$COMMENT', [";; fn test_return_incorrect_number_of_args_error() {", 1144, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT', [";; fn test_return_incorrect_number_of_args_error() {", 1144, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0)\=@='$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _107056)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _268642))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _268642))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _268642))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _268642))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _268642)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _268642)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _274228))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _274228))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _274228)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _274228)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _274228)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0)\=@='$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _268642)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _101444))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _101444))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _101444))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _101444))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _101444)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _101444)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _296548))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _296548))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _296548)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _296548)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _296548)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0)\=@='$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _101444)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0)))
   Call: (261) [system] '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0)\=@='$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _325326, [], _325328)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _325326, [], _325328)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _325326, [], _325328)
   Call: (258) [system] atom('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _325326, [], _325328)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _325326, [], _325328)
   Call: (258) [system] compound('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
   Exit: (258) [system] compound('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), _334642, _334644)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT', [";; fn test_return_incorrect_number_of_args_error() {", 1144, 0])
^  Call: (258) [user] subst_vars([";; fn test_return_incorrect_number_of_args_error() {", 1144, 0], _336528, [], _325328)
^  Unify: (258) [user] subst_vars([";; fn test_return_incorrect_number_of_args_error() {", 1144, 0], [";; fn test_return_incorrect_number_of_args_error() {", 1144, 0], [], [])
   Call: (259) [system] var([";; fn test_return_incorrect_number_of_args_error() {", 1144, 0])
^  Redo: (258) [user] subst_vars([";; fn test_return_incorrect_number_of_args_error() {", 1144, 0], _336528, [], _325328)
^  Unify: (258) [user] subst_vars([";; fn test_return_incorrect_number_of_args_error() {", 1144, 0], [_340264|_340266], [], _325328)
^  Call: (259) [user] subst_vars(";; fn test_return_incorrect_number_of_args_error() {", _340264, [], _341204)
^  Unify: (259) [user] subst_vars(";; fn test_return_incorrect_number_of_args_error() {", ";; fn test_return_incorrect_number_of_args_error() {", [], [])
   Call: (260) [system] var(";; fn test_return_incorrect_number_of_args_error() {")
^  Redo: (259) [user] subst_vars(";; fn test_return_incorrect_number_of_args_error() {", _340264, [], _341204)
^  Unify: (259) [user] subst_vars(";; fn test_return_incorrect_number_of_args_error() {", _340264, [], _341204)
   Call: (260) [system] atom(";; fn test_return_incorrect_number_of_args_error() {")
^  Redo: (259) [user] subst_vars(";; fn test_return_incorrect_number_of_args_error() {", _340264, [], _341204)
^  Unify: (259) [user] subst_vars(";; fn test_return_incorrect_number_of_args_error() {", _340264, [], _341204)
   Call: (260) [system] compound(";; fn test_return_incorrect_number_of_args_error() {")
^  Redo: (259) [user] subst_vars(";; fn test_return_incorrect_number_of_args_error() {", _340264, [], _341204)
^  Unify: (259) [user] subst_vars(";; fn test_return_incorrect_number_of_args_error() {", ";; fn test_return_incorrect_number_of_args_error() {", [], [])
^  Exit: (259) [user] subst_vars(";; fn test_return_incorrect_number_of_args_error() {", ";; fn test_return_incorrect_number_of_args_error() {", [], [])
^  Call: (259) [user] subst_vars([1144, 0], _340266, [], _325328)
^  Unify: (259) [user] subst_vars([1144, 0], [1144, 0], [], [])
   Call: (260) [system] var([1144, 0])
^  Redo: (259) [user] subst_vars([1144, 0], _340266, [], _325328)
^  Unify: (259) [user] subst_vars([1144, 0], [_356136|_356138], [], _325328)
^  Call: (260) [user] subst_vars(1144, _356136, [], _357076)
^  Unify: (260) [user] subst_vars(1144, 1144, [], [])
   Call: (261) [system] var(1144)
^  Redo: (260) [user] subst_vars(1144, _356136, [], _357076)
^  Unify: (260) [user] subst_vars(1144, _356136, [], _357076)
   Call: (261) [system] atom(1144)
^  Redo: (260) [user] subst_vars(1144, _356136, [], _357076)
^  Unify: (260) [user] subst_vars(1144, _356136, [], _357076)
   Call: (261) [system] compound(1144)
^  Redo: (260) [user] subst_vars(1144, _356136, [], _357076)
^  Unify: (260) [user] subst_vars(1144, 1144, [], [])
^  Exit: (260) [user] subst_vars(1144, 1144, [], [])
^  Call: (260) [user] subst_vars([0], _356138, [], _325328)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _356138, [], _325328)
^  Unify: (260) [user] subst_vars([0], [_372008|_372010], [], _325328)
^  Call: (261) [user] subst_vars(0, _372008, [], _372948)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _372008, [], _372948)
^  Unify: (261) [user] subst_vars(0, _372008, [], _372948)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _372008, [], _372948)
^  Unify: (261) [user] subst_vars(0, _372008, [], _372948)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _372008, [], _372948)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _372010, [], _325328)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _372010, [], _325328)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1144, 0], [1144, 0], [], [])
^  Exit: (258) [user] subst_vars([";; fn test_return_incorrect_number_of_args_error() {", 1144, 0], [";; fn test_return_incorrect_number_of_args_error() {", 1144, 0], [], [])
   Call: (258) [system] compound_name_arguments(_325326, '$COMMENT', [";; fn test_return_incorrect_number_of_args_error() {", 1144, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT', [";; fn test_return_incorrect_number_of_args_error() {", 1144, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), [], [])
   Call: (257) [system] _395366=metta_file_buffer(+, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_return_incorrect_number_of_args_error() {", 1144, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1145, 0, 41983, '$COMMENT'(";;     let program1 = \"", 1145, 0), '$stream_position'(41983, 1145, 0, 41983)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program1 = \"", 1145, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program1 = \"", 1145, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     let program1 = \"", 1145, 0), _448088))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let program1 = \"", 1145, 0), _448088))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     let program1 = \"", 1145, 0), _448088)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let program1 = \"", 1145, 0), _448088)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     let program1 = \"", 1145, 0), _448088)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     let program1 = \"", 1145, 0), _448088)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1145, 0), _453700))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1145, 0), _453700))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1145, 0), _453700))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1145, 0), _453700))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1145, 0), _453700)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1145, 0), _453700)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1145, 0), _459286))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1145, 0), _459286))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1145, 0), _459286)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1145, 0), _459286)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1145, 0), _459286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1145, 0), _459286)
   Call: (270) [system] var('$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1145, 0), _459286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1145, 0), '$VAR'(_466746))
   Call: (270) [system] atom('$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1145, 0), _459286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1145, 0), _459286)
   Call: (270) [system] '$COMMENT'(";;     let program1 = \"", 1145, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1145, 0), _459286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1145, 0), _459286)
   Call: (270) [system] '$COMMENT'(";;     let program1 = \"", 1145, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1145, 0), _459286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1145, 0), _459286)
   Call: (270) [system] '$COMMENT'(";;     let program1 = \"", 1145, 0)==[_476026, _476032]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1145, 0), _459286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1145, 0), _459286)
   Call: (270) [system] is_list('$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1145, 0), _459286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1145, 0), _459286)
   Call: (270) [system] string('$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1145, 0), _459286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1145, 0), _459286)
   Call: (270) [system] compound('$COMMENT'(";;     let program1 = \"", 1145, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     let program1 = \"", 1145, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     let program1 = \"", 1145, 0), _486228, _486230)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT', [";;     let program1 = \"", 1145, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     let program1 = \"", 1145, 0], _489970)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let program1 = \"", 1145, 0], _489970)
   Call: (271) [apply] apply:maplist_([";;     let program1 = \"", 1145, 0], _489970, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     let program1 = \"", 1145, 0], [_492788|_492790], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     let program1 = \"", _492788)
^  Unify: (272) [user] mfix_vars1(";;     let program1 = \"", _492788)
   Call: (273) [system] var(";;     let program1 = \"")
^  Redo: (272) [user] mfix_vars1(";;     let program1 = \"", _492788)
^  Unify: (272) [user] mfix_vars1(";;     let program1 = \"", '$VAR'(_497434))
   Call: (273) [system] atom(";;     let program1 = \"")
^  Redo: (272) [user] mfix_vars1(";;     let program1 = \"", _492788)
^  Unify: (272) [user] mfix_vars1(";;     let program1 = \"", _492788)
   Call: (273) [system] ";;     let program1 = \""==true
^  Redo: (272) [user] mfix_vars1(";;     let program1 = \"", _492788)
^  Unify: (272) [user] mfix_vars1(";;     let program1 = \"", _492788)
   Call: (273) [system] ";;     let program1 = \""==false
^  Redo: (272) [user] mfix_vars1(";;     let program1 = \"", _492788)
^  Unify: (272) [user] mfix_vars1(";;     let program1 = \"", _492788)
   Call: (273) [system] ";;     let program1 = \""==[_506714, _506720]
^  Redo: (272) [user] mfix_vars1(";;     let program1 = \"", _492788)
^  Unify: (272) [user] mfix_vars1(";;     let program1 = \"", _492788)
   Call: (273) [system] is_list(";;     let program1 = \"")
^  Redo: (272) [user] mfix_vars1(";;     let program1 = \"", _492788)
^  Unify: (272) [user] mfix_vars1(";;     let program1 = \"", _492788)
   Call: (273) [system] string(";;     let program1 = \"")
   Exit: (273) [system] string(";;     let program1 = \"")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     let program1 = \"", _492788)
^  Unify: (272) [user] mfix_vars1(";;     let program1 = \"", _492788)
   Call: (273) [system] compound(";;     let program1 = \"")
^  Redo: (272) [user] mfix_vars1(";;     let program1 = \"", _492788)
^  Unify: (272) [user] mfix_vars1(";;     let program1 = \"", _492788)
^  Call: (273) [user] symbol(";;     let program1 = \"")
^  Unify: (273) [user] symbol(";;     let program1 = \"")
   Call: (274) [system] atom(";;     let program1 = \"")
   Fail: (274) [system] atom(";;     let program1 = \"")
^  Fail: (273) [user] symbol(";;     let program1 = \"")
^  Redo: (272) [user] mfix_vars1(";;     let program1 = \"", _6028)
   Call: (273) [system] ";;     let program1 = \""=_6028
   Exit: (273) [system] ";;     let program1 = \""=";;     let program1 = \""
^  Exit: (272) [user] mfix_vars1(";;     let program1 = \"", ";;     let program1 = \"")
   Call: (272) [apply] apply:maplist_([1145, 0], _6030, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1145, 0], [_12878|_12880], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1145, _12878)
^  Unify: (273) [user] mfix_vars1(1145, _12878)
   Call: (274) [system] var(1145)
^  Redo: (273) [user] mfix_vars1(1145, _12878)
^  Unify: (273) [user] mfix_vars1(1145, '$VAR'(_17524))
   Call: (274) [system] atom(1145)
^  Redo: (273) [user] mfix_vars1(1145, _12878)
^  Unify: (273) [user] mfix_vars1(1145, _12878)
   Call: (274) [system] 1145==true
^  Redo: (273) [user] mfix_vars1(1145, _12878)
^  Unify: (273) [user] mfix_vars1(1145, _12878)
   Call: (274) [system] 1145==false
^  Redo: (273) [user] mfix_vars1(1145, _12878)
^  Unify: (273) [user] mfix_vars1(1145, _12878)
   Call: (274) [system] 1145==[_26804, _26810]
^  Redo: (273) [user] mfix_vars1(1145, _12878)
^  Unify: (273) [user] mfix_vars1(1145, _12878)
   Call: (274) [system] is_list(1145)
^  Redo: (273) [user] mfix_vars1(1145, _12878)
^  Unify: (273) [user] mfix_vars1(1145, _12878)
   Call: (274) [system] string(1145)
^  Redo: (273) [user] mfix_vars1(1145, _12878)
^  Unify: (273) [user] mfix_vars1(1145, _12878)
   Call: (274) [system] compound(1145)
^  Redo: (273) [user] mfix_vars1(1145, _12878)
^  Unify: (273) [user] mfix_vars1(1145, _12878)
^  Call: (274) [user] symbol(1145)
^  Unify: (274) [user] symbol(1145)
   Call: (275) [system] atom(1145)
   Fail: (275) [system] atom(1145)
^  Fail: (274) [user] symbol(1145)
^  Redo: (273) [user] mfix_vars1(1145, _12878)
   Call: (274) [system] 1145=_12878
   Exit: (274) [system] 1145=1145
^  Exit: (273) [user] mfix_vars1(1145, 1145)
   Call: (273) [apply] apply:maplist_([0], _12880, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_47204|_47206], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _47204)
^  Unify: (274) [user] mfix_vars1(0, _47204)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _47204)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_51850))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _47204)
^  Unify: (274) [user] mfix_vars1(0, _47204)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _47204)
^  Unify: (274) [user] mfix_vars1(0, _47204)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _47204)
^  Unify: (274) [user] mfix_vars1(0, _47204)
   Call: (275) [system] 0==[_61130, _61136]
^  Redo: (274) [user] mfix_vars1(0, _47204)
^  Unify: (274) [user] mfix_vars1(0, _47204)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _47204)
^  Unify: (274) [user] mfix_vars1(0, _47204)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _47204)
^  Unify: (274) [user] mfix_vars1(0, _47204)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _47204)
^  Unify: (274) [user] mfix_vars1(0, _47204)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _47204)
   Call: (275) [system] 0=_47204
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _47206, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1145, 0], [1145, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     let program1 = \"", 1145, 0], [";;     let program1 = \"", 1145, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let program1 = \"", 1145, 0], [";;     let program1 = \"", 1145, 0])
   Call: (270) [system] compound_name_arguments(_5982, '$COMMENT', [";;     let program1 = \"", 1145, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT', [";;     let program1 = \"", 1145, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0)))
   Call: (267) [system] '$COMMENT'(";;     let program1 = \"", 1145, 0)\=@='$COMMENT'(";;     let program1 = \"", 1145, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1145, 0), _5968)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1145, 0), _97378))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1145, 0), _97378))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1145, 0), _97378))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1145, 0), _97378))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1145, 0), _97378)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1145, 0), _97378)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1145, 0), _102964))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1145, 0), _102964))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1145, 0), _102964)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let program1 = \"", 1145, 0), _102964)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     let program1 = \"", 1145, 0), _102964)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0)))
   Call: (267) [system] '$COMMENT'(";;     let program1 = \"", 1145, 0)\=@='$COMMENT'(";;     let program1 = \"", 1145, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1145, 0), _97378)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1145, 0), _5948))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1145, 0), _5948))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1145, 0), _5948))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1145, 0), _5948))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1145, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1145, 0), _5948)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1145, 0), _125284))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1145, 0), _125284))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1145, 0), _125284)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let program1 = \"", 1145, 0), _125284)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     let program1 = \"", 1145, 0), _125284)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0)))
   Call: (267) [system] '$COMMENT'(";;     let program1 = \"", 1145, 0)\=@='$COMMENT'(";;     let program1 = \"", 1145, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1145, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0)))
   Call: (261) [system] '$COMMENT'(";;     let program1 = \"", 1145, 0)\=@='$COMMENT'(";;     let program1 = \"", 1145, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program1 = \"", 1145, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program1 = \"", 1145, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program1 = \"", 1145, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program1 = \"", 1145, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program1 = \"", 1145, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     let program1 = \"", 1145, 0), _154062, [], _154064)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let program1 = \"", 1145, 0), _154062, [], _154064)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let program1 = \"", 1145, 0), _154062, [], _154064)
   Call: (258) [system] atom('$COMMENT'(";;     let program1 = \"", 1145, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let program1 = \"", 1145, 0), _154062, [], _154064)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let program1 = \"", 1145, 0), _154062, [], _154064)
   Call: (258) [system] compound('$COMMENT'(";;     let program1 = \"", 1145, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     let program1 = \"", 1145, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     let program1 = \"", 1145, 0), _163378, _163380)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT', [";;     let program1 = \"", 1145, 0])
^  Call: (258) [user] subst_vars([";;     let program1 = \"", 1145, 0], _165264, [], _154064)
^  Unify: (258) [user] subst_vars([";;     let program1 = \"", 1145, 0], [";;     let program1 = \"", 1145, 0], [], [])
   Call: (259) [system] var([";;     let program1 = \"", 1145, 0])
^  Redo: (258) [user] subst_vars([";;     let program1 = \"", 1145, 0], _165264, [], _154064)
^  Unify: (258) [user] subst_vars([";;     let program1 = \"", 1145, 0], [_169000|_169002], [], _154064)
^  Call: (259) [user] subst_vars(";;     let program1 = \"", _169000, [], _169940)
^  Unify: (259) [user] subst_vars(";;     let program1 = \"", ";;     let program1 = \"", [], [])
   Call: (260) [system] var(";;     let program1 = \"")
^  Redo: (259) [user] subst_vars(";;     let program1 = \"", _169000, [], _169940)
^  Unify: (259) [user] subst_vars(";;     let program1 = \"", _169000, [], _169940)
   Call: (260) [system] atom(";;     let program1 = \"")
^  Redo: (259) [user] subst_vars(";;     let program1 = \"", _169000, [], _169940)
^  Unify: (259) [user] subst_vars(";;     let program1 = \"", _169000, [], _169940)
   Call: (260) [system] compound(";;     let program1 = \"")
^  Redo: (259) [user] subst_vars(";;     let program1 = \"", _169000, [], _169940)
^  Unify: (259) [user] subst_vars(";;     let program1 = \"", ";;     let program1 = \"", [], [])
^  Exit: (259) [user] subst_vars(";;     let program1 = \"", ";;     let program1 = \"", [], [])
^  Call: (259) [user] subst_vars([1145, 0], _169002, [], _154064)
^  Unify: (259) [user] subst_vars([1145, 0], [1145, 0], [], [])
   Call: (260) [system] var([1145, 0])
^  Redo: (259) [user] subst_vars([1145, 0], _169002, [], _154064)
^  Unify: (259) [user] subst_vars([1145, 0], [_184872|_184874], [], _154064)
^  Call: (260) [user] subst_vars(1145, _184872, [], _185812)
^  Unify: (260) [user] subst_vars(1145, 1145, [], [])
   Call: (261) [system] var(1145)
^  Redo: (260) [user] subst_vars(1145, _184872, [], _185812)
^  Unify: (260) [user] subst_vars(1145, _184872, [], _185812)
   Call: (261) [system] atom(1145)
^  Redo: (260) [user] subst_vars(1145, _184872, [], _185812)
^  Unify: (260) [user] subst_vars(1145, _184872, [], _185812)
   Call: (261) [system] compound(1145)
^  Redo: (260) [user] subst_vars(1145, _184872, [], _185812)
^  Unify: (260) [user] subst_vars(1145, 1145, [], [])
^  Exit: (260) [user] subst_vars(1145, 1145, [], [])
^  Call: (260) [user] subst_vars([0], _184874, [], _154064)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _184874, [], _154064)
^  Unify: (260) [user] subst_vars([0], [_200744|_200746], [], _154064)
^  Call: (261) [user] subst_vars(0, _200744, [], _201684)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _200744, [], _201684)
^  Unify: (261) [user] subst_vars(0, _200744, [], _201684)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _200744, [], _201684)
^  Unify: (261) [user] subst_vars(0, _200744, [], _201684)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _200744, [], _201684)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _200746, [], _154064)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _200746, [], _154064)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1145, 0], [1145, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     let program1 = \"", 1145, 0], [";;     let program1 = \"", 1145, 0], [], [])
   Call: (258) [system] compound_name_arguments(_154062, '$COMMENT', [";;     let program1 = \"", 1145, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT', [";;     let program1 = \"", 1145, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     let program1 = \"", 1145, 0), '$COMMENT'(";;     let program1 = \"", 1145, 0), [], [])
   Call: (257) [system] _224102=metta_file_buffer(+, '$COMMENT'(";;     let program1 = \"", 1145, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     let program1 = \"", 1145, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     let program1 = \"", 1145, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let program1 = \"", 1145, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let program1 = \"", 1145, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program1 = \"", 1145, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program1 = \"", 1145, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program1 = \"", 1145, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program1 = \"", 1145, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1146, 0, 42007, '$COMMENT'(";;      (: a A)", 1146, 0), '$stream_position'(42007, 1146, 0, 42007)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: a A)", 1146, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: a A)", 1146, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;      (: a A)", 1146, 0), _276822))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      (: a A)", 1146, 0), _276822))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;      (: a A)", 1146, 0), _276822)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      (: a A)", 1146, 0), _276822)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;      (: a A)", 1146, 0), _276822)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;      (: a A)", 1146, 0), _276822)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;      (: a A)", 1146, 0), _282434))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      (: a A)", 1146, 0), _282434))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;      (: a A)", 1146, 0), _282434))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      (: a A)", 1146, 0), _282434))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: a A)", 1146, 0), _282434)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: a A)", 1146, 0), _282434)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;      (: a A)", 1146, 0), _288020))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      (: a A)", 1146, 0), _288020))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;      (: a A)", 1146, 0), _288020)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      (: a A)", 1146, 0), _288020)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;      (: a A)", 1146, 0), _288020)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: a A)", 1146, 0), _288020)
   Call: (270) [system] var('$COMMENT'(";;      (: a A)", 1146, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: a A)", 1146, 0), _288020)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: a A)", 1146, 0), '$VAR'(_295480))
   Call: (270) [system] atom('$COMMENT'(";;      (: a A)", 1146, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: a A)", 1146, 0), _288020)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: a A)", 1146, 0), _288020)
   Call: (270) [system] '$COMMENT'(";;      (: a A)", 1146, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: a A)", 1146, 0), _288020)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: a A)", 1146, 0), _288020)
   Call: (270) [system] '$COMMENT'(";;      (: a A)", 1146, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: a A)", 1146, 0), _288020)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: a A)", 1146, 0), _288020)
   Call: (270) [system] '$COMMENT'(";;      (: a A)", 1146, 0)==[_304760, _304766]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: a A)", 1146, 0), _288020)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: a A)", 1146, 0), _288020)
   Call: (270) [system] is_list('$COMMENT'(";;      (: a A)", 1146, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: a A)", 1146, 0), _288020)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: a A)", 1146, 0), _288020)
   Call: (270) [system] string('$COMMENT'(";;      (: a A)", 1146, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: a A)", 1146, 0), _288020)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: a A)", 1146, 0), _288020)
   Call: (270) [system] compound('$COMMENT'(";;      (: a A)", 1146, 0))
   Exit: (270) [system] compound('$COMMENT'(";;      (: a A)", 1146, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;      (: a A)", 1146, 0), _314962, _314964)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT', [";;      (: a A)", 1146, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;      (: a A)", 1146, 0], _318704)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;      (: a A)", 1146, 0], _318704)
   Call: (271) [apply] apply:maplist_([";;      (: a A)", 1146, 0], _318704, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;      (: a A)", 1146, 0], [_321522|_321524], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;      (: a A)", _321522)
^  Unify: (272) [user] mfix_vars1(";;      (: a A)", _321522)
   Call: (273) [system] var(";;      (: a A)")
^  Redo: (272) [user] mfix_vars1(";;      (: a A)", _321522)
^  Unify: (272) [user] mfix_vars1(";;      (: a A)", '$VAR'(_326168))
   Call: (273) [system] atom(";;      (: a A)")
^  Redo: (272) [user] mfix_vars1(";;      (: a A)", _321522)
^  Unify: (272) [user] mfix_vars1(";;      (: a A)", _321522)
   Call: (273) [system] ";;      (: a A)"==true
^  Redo: (272) [user] mfix_vars1(";;      (: a A)", _321522)
^  Unify: (272) [user] mfix_vars1(";;      (: a A)", _321522)
   Call: (273) [system] ";;      (: a A)"==false
^  Redo: (272) [user] mfix_vars1(";;      (: a A)", _321522)
^  Unify: (272) [user] mfix_vars1(";;      (: a A)", _321522)
   Call: (273) [system] ";;      (: a A)"==[_335448, _335454]
^  Redo: (272) [user] mfix_vars1(";;      (: a A)", _321522)
^  Unify: (272) [user] mfix_vars1(";;      (: a A)", _321522)
   Call: (273) [system] is_list(";;      (: a A)")
^  Redo: (272) [user] mfix_vars1(";;      (: a A)", _321522)
^  Unify: (272) [user] mfix_vars1(";;      (: a A)", _321522)
   Call: (273) [system] string(";;      (: a A)")
   Exit: (273) [system] string(";;      (: a A)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;      (: a A)", _321522)
^  Unify: (272) [user] mfix_vars1(";;      (: a A)", _321522)
   Call: (273) [system] compound(";;      (: a A)")
^  Redo: (272) [user] mfix_vars1(";;      (: a A)", _321522)
^  Unify: (272) [user] mfix_vars1(";;      (: a A)", _321522)
^  Call: (273) [user] symbol(";;      (: a A)")
^  Unify: (273) [user] symbol(";;      (: a A)")
   Call: (274) [system] atom(";;      (: a A)")
   Fail: (274) [system] atom(";;      (: a A)")
^  Fail: (273) [user] symbol(";;      (: a A)")
^  Redo: (272) [user] mfix_vars1(";;      (: a A)", _321522)
   Call: (273) [system] ";;      (: a A)"=_321522
   Exit: (273) [system] ";;      (: a A)"=";;      (: a A)"
^  Exit: (272) [user] mfix_vars1(";;      (: a A)", ";;      (: a A)")
   Call: (272) [apply] apply:maplist_([1146, 0], _321524, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1146, 0], [_359520|_359522], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1146, _359520)
^  Unify: (273) [user] mfix_vars1(1146, _359520)
   Call: (274) [system] var(1146)
^  Redo: (273) [user] mfix_vars1(1146, _359520)
^  Unify: (273) [user] mfix_vars1(1146, '$VAR'(_364166))
   Call: (274) [system] atom(1146)
^  Redo: (273) [user] mfix_vars1(1146, _359520)
^  Unify: (273) [user] mfix_vars1(1146, _359520)
   Call: (274) [system] 1146==true
^  Redo: (273) [user] mfix_vars1(1146, _359520)
^  Unify: (273) [user] mfix_vars1(1146, _359520)
   Call: (274) [system] 1146==false
^  Redo: (273) [user] mfix_vars1(1146, _359520)
^  Unify: (273) [user] mfix_vars1(1146, _359520)
   Call: (274) [system] 1146==[_373446, _373452]
^  Redo: (273) [user] mfix_vars1(1146, _359520)
^  Unify: (273) [user] mfix_vars1(1146, _359520)
   Call: (274) [system] is_list(1146)
^  Redo: (273) [user] mfix_vars1(1146, _359520)
^  Unify: (273) [user] mfix_vars1(1146, _359520)
   Call: (274) [system] string(1146)
^  Redo: (273) [user] mfix_vars1(1146, _359520)
^  Unify: (273) [user] mfix_vars1(1146, _359520)
   Call: (274) [system] compound(1146)
^  Redo: (273) [user] mfix_vars1(1146, _359520)
^  Unify: (273) [user] mfix_vars1(1146, _359520)
^  Call: (274) [user] symbol(1146)
^  Unify: (274) [user] symbol(1146)
   Call: (275) [system] atom(1146)
   Fail: (275) [system] atom(1146)
^  Fail: (274) [user] symbol(1146)
^  Redo: (273) [user] mfix_vars1(1146, _359520)
   Call: (274) [system] 1146=_359520
   Exit: (274) [system] 1146=1146
^  Exit: (273) [user] mfix_vars1(1146, 1146)
   Call: (273) [apply] apply:maplist_([0], _359522, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_393846|_393848], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _393846)
^  Unify: (274) [user] mfix_vars1(0, _393846)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _393846)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_398492))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _393846)
^  Unify: (274) [user] mfix_vars1(0, _393846)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _393846)
^  Unify: (274) [user] mfix_vars1(0, _393846)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _393846)
^  Unify: (274) [user] mfix_vars1(0, _393846)
   Call: (275) [system] 0==[_407772, _407778]
^  Redo: (274) [user] mfix_vars1(0, _393846)
^  Unify: (274) [user] mfix_vars1(0, _393846)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _393846)
^  Unify: (274) [user] mfix_vars1(0, _393846)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _393846)
^  Unify: (274) [user] mfix_vars1(0, _393846)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _393846)
^  Unify: (274) [user] mfix_vars1(0, _393846)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _393846)
   Call: (275) [system] 0=_393846
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _393848, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1146, 0], [1146, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;      (: a A)", 1146, 0], [";;      (: a A)", 1146, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;      (: a A)", 1146, 0], [";;      (: a A)", 1146, 0])
   Call: (270) [system] compound_name_arguments(_288020, '$COMMENT', [";;      (: a A)", 1146, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT', [";;      (: a A)", 1146, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0)))
   Call: (267) [system] '$COMMENT'(";;      (: a A)", 1146, 0)\=@='$COMMENT'(";;      (: a A)", 1146, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: a A)", 1146, 0), _282434)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;      (: a A)", 1146, 0), _444020))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      (: a A)", 1146, 0), _444020))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;      (: a A)", 1146, 0), _444020))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      (: a A)", 1146, 0), _444020))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: a A)", 1146, 0), _444020)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: a A)", 1146, 0), _444020)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;      (: a A)", 1146, 0), _449606))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      (: a A)", 1146, 0), _449606))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;      (: a A)", 1146, 0), _449606)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      (: a A)", 1146, 0), _449606)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;      (: a A)", 1146, 0), _449606)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0)))
   Call: (267) [system] '$COMMENT'(";;      (: a A)", 1146, 0)\=@='$COMMENT'(";;      (: a A)", 1146, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: a A)", 1146, 0), _444020)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;      (: a A)", 1146, 0), _276822))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      (: a A)", 1146, 0), _276822))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;      (: a A)", 1146, 0), _276822))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      (: a A)", 1146, 0), _276822))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: a A)", 1146, 0), _276822)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: a A)", 1146, 0), _276822)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;      (: a A)", 1146, 0), _471926))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      (: a A)", 1146, 0), _471926))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;      (: a A)", 1146, 0), _471926)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      (: a A)", 1146, 0), _471926)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;      (: a A)", 1146, 0), _471926)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0)))
   Call: (267) [system] '$COMMENT'(";;      (: a A)", 1146, 0)\=@='$COMMENT'(";;      (: a A)", 1146, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: a A)", 1146, 0), _276822)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0)))
   Call: (261) [system] '$COMMENT'(";;      (: a A)", 1146, 0)\=@='$COMMENT'(";;      (: a A)", 1146, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: a A)", 1146, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: a A)", 1146, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: a A)", 1146, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: a A)", 1146, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: a A)", 1146, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;      (: a A)", 1146, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;      (: a A)", 1146, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;      (: a A)", 1146, 0), _500704, [], _500706)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;      (: a A)", 1146, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      (: a A)", 1146, 0), _500704, [], _500706)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (: a A)", 1146, 0), _500704, [], _500706)
   Call: (258) [system] atom('$COMMENT'(";;      (: a A)", 1146, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      (: a A)", 1146, 0), _500704, [], _500706)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (: a A)", 1146, 0), _500704, [], _500706)
   Call: (258) [system] compound('$COMMENT'(";;      (: a A)", 1146, 0))
   Exit: (258) [system] compound('$COMMENT'(";;      (: a A)", 1146, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;      (: a A)", 1146, 0), _510020, _510022)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT', [";;      (: a A)", 1146, 0])
^  Call: (258) [user] subst_vars([";;      (: a A)", 1146, 0], _511906, [], _500706)
^  Unify: (258) [user] subst_vars([";;      (: a A)", 1146, 0], [";;      (: a A)", 1146, 0], [], [])
   Call: (259) [system] var([";;      (: a A)", 1146, 0])
^  Redo: (258) [user] subst_vars([";;      (: a A)", 1146, 0], _511906, [], _500706)
^  Unify: (258) [user] subst_vars([";;      (: a A)", 1146, 0], [_515642|_515644], [], _500706)
^  Call: (259) [user] subst_vars(";;      (: a A)", _515642, [], _516582)
^  Unify: (259) [user] subst_vars(";;      (: a A)", ";;      (: a A)", [], [])
   Call: (260) [system] var(";;      (: a A)")
^  Redo: (259) [user] subst_vars(";;      (: a A)", _515642, [], _516582)
^  Unify: (259) [user] subst_vars(";;      (: a A)", _515642, [], _516582)
   Call: (260) [system] atom(";;      (: a A)")
^  Redo: (259) [user] subst_vars(";;      (: a A)", _515642, [], _516582)
^  Unify: (259) [user] subst_vars(";;      (: a A)", _515642, [], _516582)
   Call: (260) [system] compound(";;      (: a A)")
^  Redo: (259) [user] subst_vars(";;      (: a A)", _5970, [], _5974)
^  Unify: (259) [user] subst_vars(";;      (: a A)", ";;      (: a A)", [], [])
^  Exit: (259) [user] subst_vars(";;      (: a A)", ";;      (: a A)", [], [])
^  Call: (259) [user] subst_vars([1146, 0], _5972, [], _5942)
^  Unify: (259) [user] subst_vars([1146, 0], [1146, 0], [], [])
   Call: (260) [system] var([1146, 0])
^  Redo: (259) [user] subst_vars([1146, 0], _5972, [], _5942)
^  Unify: (259) [user] subst_vars([1146, 0], [_13392|_13394], [], _5942)
^  Call: (260) [user] subst_vars(1146, _13392, [], _14332)
^  Unify: (260) [user] subst_vars(1146, 1146, [], [])
   Call: (261) [system] var(1146)
^  Redo: (260) [user] subst_vars(1146, _13392, [], _14332)
^  Unify: (260) [user] subst_vars(1146, _13392, [], _14332)
   Call: (261) [system] atom(1146)
^  Redo: (260) [user] subst_vars(1146, _13392, [], _14332)
^  Unify: (260) [user] subst_vars(1146, _13392, [], _14332)
   Call: (261) [system] compound(1146)
^  Redo: (260) [user] subst_vars(1146, _13392, [], _14332)
^  Unify: (260) [user] subst_vars(1146, 1146, [], [])
^  Exit: (260) [user] subst_vars(1146, 1146, [], [])
^  Call: (260) [user] subst_vars([0], _13394, [], _5942)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _13394, [], _5942)
^  Unify: (260) [user] subst_vars([0], [_29264|_29266], [], _5942)
^  Call: (261) [user] subst_vars(0, _29264, [], _30204)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _29264, [], _30204)
^  Unify: (261) [user] subst_vars(0, _29264, [], _30204)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _29264, [], _30204)
^  Unify: (261) [user] subst_vars(0, _29264, [], _30204)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _29264, [], _30204)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _29266, [], _5942)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _29266, [], _5942)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1146, 0], [1146, 0], [], [])
^  Exit: (258) [user] subst_vars([";;      (: a A)", 1146, 0], [";;      (: a A)", 1146, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5940, '$COMMENT', [";;      (: a A)", 1146, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT', [";;      (: a A)", 1146, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;      (: a A)", 1146, 0), '$COMMENT'(";;      (: a A)", 1146, 0), [], [])
   Call: (257) [system] _52622=metta_file_buffer(+, '$COMMENT'(";;      (: a A)", 1146, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;      (: a A)", 1146, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;      (: a A)", 1146, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      (: a A)", 1146, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      (: a A)", 1146, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: a A)", 1146, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: a A)", 1146, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: a A)", 1146, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: a A)", 1146, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1147, 0, 42023, '$COMMENT'(";;      (: b B)", 1147, 0), '$stream_position'(42023, 1147, 0, 42023)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: b B)", 1147, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: b B)", 1147, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;      (: b B)", 1147, 0), _105342))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      (: b B)", 1147, 0), _105342))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;      (: b B)", 1147, 0), _105342)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      (: b B)", 1147, 0), _105342)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;      (: b B)", 1147, 0), _105342)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;      (: b B)", 1147, 0), _105342)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;      (: b B)", 1147, 0), _110954))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      (: b B)", 1147, 0), _110954))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;      (: b B)", 1147, 0), _110954))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      (: b B)", 1147, 0), _110954))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: b B)", 1147, 0), _110954)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: b B)", 1147, 0), _110954)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;      (: b B)", 1147, 0), _116540))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      (: b B)", 1147, 0), _116540))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;      (: b B)", 1147, 0), _116540)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      (: b B)", 1147, 0), _116540)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;      (: b B)", 1147, 0), _116540)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: b B)", 1147, 0), _116540)
   Call: (270) [system] var('$COMMENT'(";;      (: b B)", 1147, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: b B)", 1147, 0), _116540)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: b B)", 1147, 0), '$VAR'(_124000))
   Call: (270) [system] atom('$COMMENT'(";;      (: b B)", 1147, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: b B)", 1147, 0), _116540)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: b B)", 1147, 0), _116540)
   Call: (270) [system] '$COMMENT'(";;      (: b B)", 1147, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: b B)", 1147, 0), _116540)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: b B)", 1147, 0), _116540)
   Call: (270) [system] '$COMMENT'(";;      (: b B)", 1147, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: b B)", 1147, 0), _116540)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: b B)", 1147, 0), _116540)
   Call: (270) [system] '$COMMENT'(";;      (: b B)", 1147, 0)==[_133280, _133286]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: b B)", 1147, 0), _116540)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: b B)", 1147, 0), _116540)
   Call: (270) [system] is_list('$COMMENT'(";;      (: b B)", 1147, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: b B)", 1147, 0), _116540)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: b B)", 1147, 0), _116540)
   Call: (270) [system] string('$COMMENT'(";;      (: b B)", 1147, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: b B)", 1147, 0), _116540)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: b B)", 1147, 0), _116540)
   Call: (270) [system] compound('$COMMENT'(";;      (: b B)", 1147, 0))
   Exit: (270) [system] compound('$COMMENT'(";;      (: b B)", 1147, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;      (: b B)", 1147, 0), _143482, _143484)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT', [";;      (: b B)", 1147, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;      (: b B)", 1147, 0], _147224)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;      (: b B)", 1147, 0], _147224)
   Call: (271) [apply] apply:maplist_([";;      (: b B)", 1147, 0], _147224, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;      (: b B)", 1147, 0], [_150042|_150044], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;      (: b B)", _150042)
^  Unify: (272) [user] mfix_vars1(";;      (: b B)", _150042)
   Call: (273) [system] var(";;      (: b B)")
^  Redo: (272) [user] mfix_vars1(";;      (: b B)", _150042)
^  Unify: (272) [user] mfix_vars1(";;      (: b B)", '$VAR'(_154688))
   Call: (273) [system] atom(";;      (: b B)")
^  Redo: (272) [user] mfix_vars1(";;      (: b B)", _150042)
^  Unify: (272) [user] mfix_vars1(";;      (: b B)", _150042)
   Call: (273) [system] ";;      (: b B)"==true
^  Redo: (272) [user] mfix_vars1(";;      (: b B)", _150042)
^  Unify: (272) [user] mfix_vars1(";;      (: b B)", _150042)
   Call: (273) [system] ";;      (: b B)"==false
^  Redo: (272) [user] mfix_vars1(";;      (: b B)", _150042)
^  Unify: (272) [user] mfix_vars1(";;      (: b B)", _150042)
   Call: (273) [system] ";;      (: b B)"==[_163968, _163974]
^  Redo: (272) [user] mfix_vars1(";;      (: b B)", _150042)
^  Unify: (272) [user] mfix_vars1(";;      (: b B)", _150042)
   Call: (273) [system] is_list(";;      (: b B)")
^  Redo: (272) [user] mfix_vars1(";;      (: b B)", _150042)
^  Unify: (272) [user] mfix_vars1(";;      (: b B)", _150042)
   Call: (273) [system] string(";;      (: b B)")
   Exit: (273) [system] string(";;      (: b B)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;      (: b B)", _150042)
^  Unify: (272) [user] mfix_vars1(";;      (: b B)", _150042)
   Call: (273) [system] compound(";;      (: b B)")
^  Redo: (272) [user] mfix_vars1(";;      (: b B)", _150042)
^  Unify: (272) [user] mfix_vars1(";;      (: b B)", _150042)
^  Call: (273) [user] symbol(";;      (: b B)")
^  Unify: (273) [user] symbol(";;      (: b B)")
   Call: (274) [system] atom(";;      (: b B)")
   Fail: (274) [system] atom(";;      (: b B)")
^  Fail: (273) [user] symbol(";;      (: b B)")
^  Redo: (272) [user] mfix_vars1(";;      (: b B)", _150042)
   Call: (273) [system] ";;      (: b B)"=_150042
   Exit: (273) [system] ";;      (: b B)"=";;      (: b B)"
^  Exit: (272) [user] mfix_vars1(";;      (: b B)", ";;      (: b B)")
   Call: (272) [apply] apply:maplist_([1147, 0], _150044, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1147, 0], [_188040|_188042], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1147, _188040)
^  Unify: (273) [user] mfix_vars1(1147, _188040)
   Call: (274) [system] var(1147)
^  Redo: (273) [user] mfix_vars1(1147, _188040)
^  Unify: (273) [user] mfix_vars1(1147, '$VAR'(_192686))
   Call: (274) [system] atom(1147)
^  Redo: (273) [user] mfix_vars1(1147, _188040)
^  Unify: (273) [user] mfix_vars1(1147, _188040)
   Call: (274) [system] 1147==true
^  Redo: (273) [user] mfix_vars1(1147, _188040)
^  Unify: (273) [user] mfix_vars1(1147, _188040)
   Call: (274) [system] 1147==false
^  Redo: (273) [user] mfix_vars1(1147, _188040)
^  Unify: (273) [user] mfix_vars1(1147, _188040)
   Call: (274) [system] 1147==[_201966, _201972]
^  Redo: (273) [user] mfix_vars1(1147, _188040)
^  Unify: (273) [user] mfix_vars1(1147, _188040)
   Call: (274) [system] is_list(1147)
^  Redo: (273) [user] mfix_vars1(1147, _188040)
^  Unify: (273) [user] mfix_vars1(1147, _188040)
   Call: (274) [system] string(1147)
^  Redo: (273) [user] mfix_vars1(1147, _188040)
^  Unify: (273) [user] mfix_vars1(1147, _188040)
   Call: (274) [system] compound(1147)
^  Redo: (273) [user] mfix_vars1(1147, _188040)
^  Unify: (273) [user] mfix_vars1(1147, _188040)
^  Call: (274) [user] symbol(1147)
^  Unify: (274) [user] symbol(1147)
   Call: (275) [system] atom(1147)
   Fail: (275) [system] atom(1147)
^  Fail: (274) [user] symbol(1147)
^  Redo: (273) [user] mfix_vars1(1147, _188040)
   Call: (274) [system] 1147=_188040
   Exit: (274) [system] 1147=1147
^  Exit: (273) [user] mfix_vars1(1147, 1147)
   Call: (273) [apply] apply:maplist_([0], _188042, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_222366|_222368], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _222366)
^  Unify: (274) [user] mfix_vars1(0, _222366)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _222366)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_227012))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _222366)
^  Unify: (274) [user] mfix_vars1(0, _222366)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _222366)
^  Unify: (274) [user] mfix_vars1(0, _222366)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _222366)
^  Unify: (274) [user] mfix_vars1(0, _222366)
   Call: (275) [system] 0==[_236292, _236298]
^  Redo: (274) [user] mfix_vars1(0, _222366)
^  Unify: (274) [user] mfix_vars1(0, _222366)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _222366)
^  Unify: (274) [user] mfix_vars1(0, _222366)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _222366)
^  Unify: (274) [user] mfix_vars1(0, _222366)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _222366)
^  Unify: (274) [user] mfix_vars1(0, _222366)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _222366)
   Call: (275) [system] 0=_222366
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _222368, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1147, 0], [1147, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;      (: b B)", 1147, 0], [";;      (: b B)", 1147, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;      (: b B)", 1147, 0], [";;      (: b B)", 1147, 0])
   Call: (270) [system] compound_name_arguments(_116540, '$COMMENT', [";;      (: b B)", 1147, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT', [";;      (: b B)", 1147, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0)))
   Call: (267) [system] '$COMMENT'(";;      (: b B)", 1147, 0)\=@='$COMMENT'(";;      (: b B)", 1147, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: b B)", 1147, 0), _110954)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;      (: b B)", 1147, 0), _272540))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      (: b B)", 1147, 0), _272540))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;      (: b B)", 1147, 0), _272540))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      (: b B)", 1147, 0), _272540))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: b B)", 1147, 0), _272540)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: b B)", 1147, 0), _272540)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;      (: b B)", 1147, 0), _278126))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      (: b B)", 1147, 0), _278126))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;      (: b B)", 1147, 0), _278126)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      (: b B)", 1147, 0), _278126)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;      (: b B)", 1147, 0), _278126)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0)))
   Call: (267) [system] '$COMMENT'(";;      (: b B)", 1147, 0)\=@='$COMMENT'(";;      (: b B)", 1147, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: b B)", 1147, 0), _272540)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;      (: b B)", 1147, 0), _105342))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      (: b B)", 1147, 0), _105342))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;      (: b B)", 1147, 0), _105342))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      (: b B)", 1147, 0), _105342))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: b B)", 1147, 0), _105342)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: b B)", 1147, 0), _105342)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;      (: b B)", 1147, 0), _300446))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      (: b B)", 1147, 0), _300446))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;      (: b B)", 1147, 0), _300446)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      (: b B)", 1147, 0), _300446)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;      (: b B)", 1147, 0), _300446)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0)))
   Call: (267) [system] '$COMMENT'(";;      (: b B)", 1147, 0)\=@='$COMMENT'(";;      (: b B)", 1147, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: b B)", 1147, 0), _105342)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0)))
   Call: (261) [system] '$COMMENT'(";;      (: b B)", 1147, 0)\=@='$COMMENT'(";;      (: b B)", 1147, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: b B)", 1147, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: b B)", 1147, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: b B)", 1147, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: b B)", 1147, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: b B)", 1147, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;      (: b B)", 1147, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;      (: b B)", 1147, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;      (: b B)", 1147, 0), _329224, [], _329226)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;      (: b B)", 1147, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      (: b B)", 1147, 0), _329224, [], _329226)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (: b B)", 1147, 0), _329224, [], _329226)
   Call: (258) [system] atom('$COMMENT'(";;      (: b B)", 1147, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      (: b B)", 1147, 0), _329224, [], _329226)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (: b B)", 1147, 0), _329224, [], _329226)
   Call: (258) [system] compound('$COMMENT'(";;      (: b B)", 1147, 0))
   Exit: (258) [system] compound('$COMMENT'(";;      (: b B)", 1147, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;      (: b B)", 1147, 0), _338540, _338542)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT', [";;      (: b B)", 1147, 0])
^  Call: (258) [user] subst_vars([";;      (: b B)", 1147, 0], _340426, [], _329226)
^  Unify: (258) [user] subst_vars([";;      (: b B)", 1147, 0], [";;      (: b B)", 1147, 0], [], [])
   Call: (259) [system] var([";;      (: b B)", 1147, 0])
^  Redo: (258) [user] subst_vars([";;      (: b B)", 1147, 0], _340426, [], _329226)
^  Unify: (258) [user] subst_vars([";;      (: b B)", 1147, 0], [_344162|_344164], [], _329226)
^  Call: (259) [user] subst_vars(";;      (: b B)", _344162, [], _345102)
^  Unify: (259) [user] subst_vars(";;      (: b B)", ";;      (: b B)", [], [])
   Call: (260) [system] var(";;      (: b B)")
^  Redo: (259) [user] subst_vars(";;      (: b B)", _344162, [], _345102)
^  Unify: (259) [user] subst_vars(";;      (: b B)", _344162, [], _345102)
   Call: (260) [system] atom(";;      (: b B)")
^  Redo: (259) [user] subst_vars(";;      (: b B)", _344162, [], _345102)
^  Unify: (259) [user] subst_vars(";;      (: b B)", _344162, [], _345102)
   Call: (260) [system] compound(";;      (: b B)")
^  Redo: (259) [user] subst_vars(";;      (: b B)", _344162, [], _345102)
^  Unify: (259) [user] subst_vars(";;      (: b B)", ";;      (: b B)", [], [])
^  Exit: (259) [user] subst_vars(";;      (: b B)", ";;      (: b B)", [], [])
^  Call: (259) [user] subst_vars([1147, 0], _344164, [], _329226)
^  Unify: (259) [user] subst_vars([1147, 0], [1147, 0], [], [])
   Call: (260) [system] var([1147, 0])
^  Redo: (259) [user] subst_vars([1147, 0], _344164, [], _329226)
^  Unify: (259) [user] subst_vars([1147, 0], [_360034|_360036], [], _329226)
^  Call: (260) [user] subst_vars(1147, _360034, [], _360974)
^  Unify: (260) [user] subst_vars(1147, 1147, [], [])
   Call: (261) [system] var(1147)
^  Redo: (260) [user] subst_vars(1147, _360034, [], _360974)
^  Unify: (260) [user] subst_vars(1147, _360034, [], _360974)
   Call: (261) [system] atom(1147)
^  Redo: (260) [user] subst_vars(1147, _360034, [], _360974)
^  Unify: (260) [user] subst_vars(1147, _360034, [], _360974)
   Call: (261) [system] compound(1147)
^  Redo: (260) [user] subst_vars(1147, _360034, [], _360974)
^  Unify: (260) [user] subst_vars(1147, 1147, [], [])
^  Exit: (260) [user] subst_vars(1147, 1147, [], [])
^  Call: (260) [user] subst_vars([0], _360036, [], _329226)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _360036, [], _329226)
^  Unify: (260) [user] subst_vars([0], [_375906|_375908], [], _329226)
^  Call: (261) [user] subst_vars(0, _375906, [], _376846)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _375906, [], _376846)
^  Unify: (261) [user] subst_vars(0, _375906, [], _376846)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _375906, [], _376846)
^  Unify: (261) [user] subst_vars(0, _375906, [], _376846)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _375906, [], _376846)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _375908, [], _329226)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _375908, [], _329226)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1147, 0], [1147, 0], [], [])
^  Exit: (258) [user] subst_vars([";;      (: b B)", 1147, 0], [";;      (: b B)", 1147, 0], [], [])
   Call: (258) [system] compound_name_arguments(_329224, '$COMMENT', [";;      (: b B)", 1147, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT', [";;      (: b B)", 1147, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;      (: b B)", 1147, 0), '$COMMENT'(";;      (: b B)", 1147, 0), [], [])
   Call: (257) [system] _399264=metta_file_buffer(+, '$COMMENT'(";;      (: b B)", 1147, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;      (: b B)", 1147, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;      (: b B)", 1147, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      (: b B)", 1147, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      (: b B)", 1147, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: b B)", 1147, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: b B)", 1147, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: b B)", 1147, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: b B)", 1147, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1148, 0, 42039, '$COMMENT'(";;      (: c C)", 1148, 0), '$stream_position'(42039, 1148, 0, 42039)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: c C)", 1148, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: c C)", 1148, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;      (: c C)", 1148, 0), _451984))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      (: c C)", 1148, 0), _451984))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;      (: c C)", 1148, 0), _451984)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      (: c C)", 1148, 0), _451984)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;      (: c C)", 1148, 0), _451984)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;      (: c C)", 1148, 0), _451984)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;      (: c C)", 1148, 0), _457596))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      (: c C)", 1148, 0), _457596))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;      (: c C)", 1148, 0), _457596))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      (: c C)", 1148, 0), _457596))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: c C)", 1148, 0), _457596)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: c C)", 1148, 0), _457596)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;      (: c C)", 1148, 0), _463182))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      (: c C)", 1148, 0), _463182))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;      (: c C)", 1148, 0), _463182)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      (: c C)", 1148, 0), _463182)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;      (: c C)", 1148, 0), _463182)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: c C)", 1148, 0), _463182)
   Call: (270) [system] var('$COMMENT'(";;      (: c C)", 1148, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: c C)", 1148, 0), _463182)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: c C)", 1148, 0), '$VAR'(_470642))
   Call: (270) [system] atom('$COMMENT'(";;      (: c C)", 1148, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: c C)", 1148, 0), _463182)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: c C)", 1148, 0), _463182)
   Call: (270) [system] '$COMMENT'(";;      (: c C)", 1148, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: c C)", 1148, 0), _463182)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: c C)", 1148, 0), _463182)
   Call: (270) [system] '$COMMENT'(";;      (: c C)", 1148, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: c C)", 1148, 0), _463182)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: c C)", 1148, 0), _463182)
   Call: (270) [system] '$COMMENT'(";;      (: c C)", 1148, 0)==[_479922, _479928]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: c C)", 1148, 0), _463182)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: c C)", 1148, 0), _463182)
   Call: (270) [system] is_list('$COMMENT'(";;      (: c C)", 1148, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: c C)", 1148, 0), _463182)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: c C)", 1148, 0), _463182)
   Call: (270) [system] string('$COMMENT'(";;      (: c C)", 1148, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: c C)", 1148, 0), _463182)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: c C)", 1148, 0), _463182)
   Call: (270) [system] compound('$COMMENT'(";;      (: c C)", 1148, 0))
   Exit: (270) [system] compound('$COMMENT'(";;      (: c C)", 1148, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;      (: c C)", 1148, 0), _490124, _490126)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT', [";;      (: c C)", 1148, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;      (: c C)", 1148, 0], _493866)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;      (: c C)", 1148, 0], _493866)
   Call: (271) [apply] apply:maplist_([";;      (: c C)", 1148, 0], _493866, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;      (: c C)", 1148, 0], [_496684|_496686], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;      (: c C)", _496684)
^  Unify: (272) [user] mfix_vars1(";;      (: c C)", _496684)
   Call: (273) [system] var(";;      (: c C)")
^  Redo: (272) [user] mfix_vars1(";;      (: c C)", _496684)
^  Unify: (272) [user] mfix_vars1(";;      (: c C)", '$VAR'(_501330))
   Call: (273) [system] atom(";;      (: c C)")
^  Redo: (272) [user] mfix_vars1(";;      (: c C)", _496684)
^  Unify: (272) [user] mfix_vars1(";;      (: c C)", _496684)
   Call: (273) [system] ";;      (: c C)"==true
^  Redo: (272) [user] mfix_vars1(";;      (: c C)", _496684)
^  Unify: (272) [user] mfix_vars1(";;      (: c C)", _496684)
   Call: (273) [system] ";;      (: c C)"==false
^  Redo: (272) [user] mfix_vars1(";;      (: c C)", _496684)
^  Unify: (272) [user] mfix_vars1(";;      (: c C)", _496684)
   Call: (273) [system] ";;      (: c C)"==[_510610, _510616]
^  Redo: (272) [user] mfix_vars1(";;      (: c C)", _496684)
^  Unify: (272) [user] mfix_vars1(";;      (: c C)", _496684)
   Call: (273) [system] is_list(";;      (: c C)")
^  Redo: (272) [user] mfix_vars1(";;      (: c C)", _496684)
^  Unify: (272) [user] mfix_vars1(";;      (: c C)", _496684)
   Call: (273) [system] string(";;      (: c C)")
   Exit: (273) [system] string(";;      (: c C)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;      (: c C)", _496684)
^  Unify: (272) [user] mfix_vars1(";;      (: c C)", _496684)
   Call: (273) [system] compound(";;      (: c C)")
^  Redo: (272) [user] mfix_vars1(";;      (: c C)", _6026)
^  Unify: (272) [user] mfix_vars1(";;      (: c C)", _6026)
^  Call: (273) [user] symbol(";;      (: c C)")
^  Unify: (273) [user] symbol(";;      (: c C)")
   Call: (274) [system] atom(";;      (: c C)")
   Fail: (274) [system] atom(";;      (: c C)")
^  Fail: (273) [user] symbol(";;      (: c C)")
^  Redo: (272) [user] mfix_vars1(";;      (: c C)", _6026)
   Call: (273) [system] ";;      (: c C)"=_6026
   Exit: (273) [system] ";;      (: c C)"=";;      (: c C)"
^  Exit: (272) [user] mfix_vars1(";;      (: c C)", ";;      (: c C)")
   Call: (272) [apply] apply:maplist_([1148, 0], _6028, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1148, 0], [_16822|_16824], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1148, _16822)
^  Unify: (273) [user] mfix_vars1(1148, _16822)
   Call: (274) [system] var(1148)
^  Redo: (273) [user] mfix_vars1(1148, _16822)
^  Unify: (273) [user] mfix_vars1(1148, '$VAR'(_21468))
   Call: (274) [system] atom(1148)
^  Redo: (273) [user] mfix_vars1(1148, _16822)
^  Unify: (273) [user] mfix_vars1(1148, _16822)
   Call: (274) [system] 1148==true
^  Redo: (273) [user] mfix_vars1(1148, _16822)
^  Unify: (273) [user] mfix_vars1(1148, _16822)
   Call: (274) [system] 1148==false
^  Redo: (273) [user] mfix_vars1(1148, _16822)
^  Unify: (273) [user] mfix_vars1(1148, _16822)
   Call: (274) [system] 1148==[_30748, _30754]
^  Redo: (273) [user] mfix_vars1(1148, _16822)
^  Unify: (273) [user] mfix_vars1(1148, _16822)
   Call: (274) [system] is_list(1148)
^  Redo: (273) [user] mfix_vars1(1148, _16822)
^  Unify: (273) [user] mfix_vars1(1148, _16822)
   Call: (274) [system] string(1148)
^  Redo: (273) [user] mfix_vars1(1148, _16822)
^  Unify: (273) [user] mfix_vars1(1148, _16822)
   Call: (274) [system] compound(1148)
^  Redo: (273) [user] mfix_vars1(1148, _16822)
^  Unify: (273) [user] mfix_vars1(1148, _16822)
^  Call: (274) [user] symbol(1148)
^  Unify: (274) [user] symbol(1148)
   Call: (275) [system] atom(1148)
   Fail: (275) [system] atom(1148)
^  Fail: (274) [user] symbol(1148)
^  Redo: (273) [user] mfix_vars1(1148, _16822)
   Call: (274) [system] 1148=_16822
   Exit: (274) [system] 1148=1148
^  Exit: (273) [user] mfix_vars1(1148, 1148)
   Call: (273) [apply] apply:maplist_([0], _16824, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_51148|_51150], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _51148)
^  Unify: (274) [user] mfix_vars1(0, _51148)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _51148)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_55794))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _51148)
^  Unify: (274) [user] mfix_vars1(0, _51148)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _51148)
^  Unify: (274) [user] mfix_vars1(0, _51148)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _51148)
^  Unify: (274) [user] mfix_vars1(0, _51148)
   Call: (275) [system] 0==[_65074, _65080]
^  Redo: (274) [user] mfix_vars1(0, _51148)
^  Unify: (274) [user] mfix_vars1(0, _51148)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _51148)
^  Unify: (274) [user] mfix_vars1(0, _51148)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _51148)
^  Unify: (274) [user] mfix_vars1(0, _51148)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _51148)
^  Unify: (274) [user] mfix_vars1(0, _51148)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _51148)
   Call: (275) [system] 0=_51148
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _51150, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1148, 0], [1148, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;      (: c C)", 1148, 0], [";;      (: c C)", 1148, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;      (: c C)", 1148, 0], [";;      (: c C)", 1148, 0])
   Call: (270) [system] compound_name_arguments(_5980, '$COMMENT', [";;      (: c C)", 1148, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT', [";;      (: c C)", 1148, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0)))
   Call: (267) [system] '$COMMENT'(";;      (: c C)", 1148, 0)\=@='$COMMENT'(";;      (: c C)", 1148, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: c C)", 1148, 0), _5966)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;      (: c C)", 1148, 0), _101322))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      (: c C)", 1148, 0), _101322))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;      (: c C)", 1148, 0), _101322))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      (: c C)", 1148, 0), _101322))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: c C)", 1148, 0), _101322)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: c C)", 1148, 0), _101322)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;      (: c C)", 1148, 0), _106908))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      (: c C)", 1148, 0), _106908))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;      (: c C)", 1148, 0), _106908)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      (: c C)", 1148, 0), _106908)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;      (: c C)", 1148, 0), _106908)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0)))
   Call: (267) [system] '$COMMENT'(";;      (: c C)", 1148, 0)\=@='$COMMENT'(";;      (: c C)", 1148, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: c C)", 1148, 0), _101322)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;      (: c C)", 1148, 0), _5946))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      (: c C)", 1148, 0), _5946))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;      (: c C)", 1148, 0), _5946))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      (: c C)", 1148, 0), _5946))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: c C)", 1148, 0), _5946)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: c C)", 1148, 0), _5946)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;      (: c C)", 1148, 0), _129228))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      (: c C)", 1148, 0), _129228))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;      (: c C)", 1148, 0), _129228)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      (: c C)", 1148, 0), _129228)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;      (: c C)", 1148, 0), _129228)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0)))
   Call: (267) [system] '$COMMENT'(";;      (: c C)", 1148, 0)\=@='$COMMENT'(";;      (: c C)", 1148, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: c C)", 1148, 0), _5946)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0)))
   Call: (261) [system] '$COMMENT'(";;      (: c C)", 1148, 0)\=@='$COMMENT'(";;      (: c C)", 1148, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: c C)", 1148, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: c C)", 1148, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: c C)", 1148, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: c C)", 1148, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: c C)", 1148, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;      (: c C)", 1148, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;      (: c C)", 1148, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;      (: c C)", 1148, 0), _158006, [], _158008)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;      (: c C)", 1148, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      (: c C)", 1148, 0), _158006, [], _158008)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (: c C)", 1148, 0), _158006, [], _158008)
   Call: (258) [system] atom('$COMMENT'(";;      (: c C)", 1148, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      (: c C)", 1148, 0), _158006, [], _158008)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (: c C)", 1148, 0), _158006, [], _158008)
   Call: (258) [system] compound('$COMMENT'(";;      (: c C)", 1148, 0))
   Exit: (258) [system] compound('$COMMENT'(";;      (: c C)", 1148, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;      (: c C)", 1148, 0), _167322, _167324)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT', [";;      (: c C)", 1148, 0])
^  Call: (258) [user] subst_vars([";;      (: c C)", 1148, 0], _169208, [], _158008)
^  Unify: (258) [user] subst_vars([";;      (: c C)", 1148, 0], [";;      (: c C)", 1148, 0], [], [])
   Call: (259) [system] var([";;      (: c C)", 1148, 0])
^  Redo: (258) [user] subst_vars([";;      (: c C)", 1148, 0], _169208, [], _158008)
^  Unify: (258) [user] subst_vars([";;      (: c C)", 1148, 0], [_172944|_172946], [], _158008)
^  Call: (259) [user] subst_vars(";;      (: c C)", _172944, [], _173884)
^  Unify: (259) [user] subst_vars(";;      (: c C)", ";;      (: c C)", [], [])
   Call: (260) [system] var(";;      (: c C)")
^  Redo: (259) [user] subst_vars(";;      (: c C)", _172944, [], _173884)
^  Unify: (259) [user] subst_vars(";;      (: c C)", _172944, [], _173884)
   Call: (260) [system] atom(";;      (: c C)")
^  Redo: (259) [user] subst_vars(";;      (: c C)", _172944, [], _173884)
^  Unify: (259) [user] subst_vars(";;      (: c C)", _172944, [], _173884)
   Call: (260) [system] compound(";;      (: c C)")
^  Redo: (259) [user] subst_vars(";;      (: c C)", _172944, [], _173884)
^  Unify: (259) [user] subst_vars(";;      (: c C)", ";;      (: c C)", [], [])
^  Exit: (259) [user] subst_vars(";;      (: c C)", ";;      (: c C)", [], [])
^  Call: (259) [user] subst_vars([1148, 0], _172946, [], _158008)
^  Unify: (259) [user] subst_vars([1148, 0], [1148, 0], [], [])
   Call: (260) [system] var([1148, 0])
^  Redo: (259) [user] subst_vars([1148, 0], _172946, [], _158008)
^  Unify: (259) [user] subst_vars([1148, 0], [_188816|_188818], [], _158008)
^  Call: (260) [user] subst_vars(1148, _188816, [], _189756)
^  Unify: (260) [user] subst_vars(1148, 1148, [], [])
   Call: (261) [system] var(1148)
^  Redo: (260) [user] subst_vars(1148, _188816, [], _189756)
^  Unify: (260) [user] subst_vars(1148, _188816, [], _189756)
   Call: (261) [system] atom(1148)
^  Redo: (260) [user] subst_vars(1148, _188816, [], _189756)
^  Unify: (260) [user] subst_vars(1148, _188816, [], _189756)
   Call: (261) [system] compound(1148)
^  Redo: (260) [user] subst_vars(1148, _188816, [], _189756)
^  Unify: (260) [user] subst_vars(1148, 1148, [], [])
^  Exit: (260) [user] subst_vars(1148, 1148, [], [])
^  Call: (260) [user] subst_vars([0], _188818, [], _158008)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _188818, [], _158008)
^  Unify: (260) [user] subst_vars([0], [_204688|_204690], [], _158008)
^  Call: (261) [user] subst_vars(0, _204688, [], _205628)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _204688, [], _205628)
^  Unify: (261) [user] subst_vars(0, _204688, [], _205628)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _204688, [], _205628)
^  Unify: (261) [user] subst_vars(0, _204688, [], _205628)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _204688, [], _205628)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _204690, [], _158008)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _204690, [], _158008)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1148, 0], [1148, 0], [], [])
^  Exit: (258) [user] subst_vars([";;      (: c C)", 1148, 0], [";;      (: c C)", 1148, 0], [], [])
   Call: (258) [system] compound_name_arguments(_158006, '$COMMENT', [";;      (: c C)", 1148, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT', [";;      (: c C)", 1148, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;      (: c C)", 1148, 0), '$COMMENT'(";;      (: c C)", 1148, 0), [], [])
   Call: (257) [system] _228046=metta_file_buffer(+, '$COMMENT'(";;      (: c C)", 1148, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;      (: c C)", 1148, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;      (: c C)", 1148, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      (: c C)", 1148, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      (: c C)", 1148, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: c C)", 1148, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: c C)", 1148, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: c C)", 1148, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: c C)", 1148, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1149, 0, 42055, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$stream_position'(42055, 1149, 0, 42055)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _280768))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _280768))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _280768)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _280768)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _280768)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _280768)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _286380))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _286380))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _286380))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _286380))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _286380)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _286380)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _291966))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _291966))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _291966)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _291966)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _291966)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _291966)
   Call: (270) [system] var('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _291966)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$VAR'(_299426))
   Call: (270) [system] atom('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _291966)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _291966)
   Call: (270) [system] '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _291966)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _291966)
   Call: (270) [system] '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _291966)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _291966)
   Call: (270) [system] '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0)==[_308706, _308712]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _291966)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _291966)
   Call: (270) [system] is_list('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _291966)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _291966)
   Call: (270) [system] string('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _291966)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _291966)
   Call: (270) [system] compound('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
   Exit: (270) [system] compound('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _318908, _318910)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT', [";;      (: foo (-> A B C))", 1149, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;      (: foo (-> A B C))", 1149, 0], _322650)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;      (: foo (-> A B C))", 1149, 0], _322650)
   Call: (271) [apply] apply:maplist_([";;      (: foo (-> A B C))", 1149, 0], _322650, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;      (: foo (-> A B C))", 1149, 0], [_325468|_325470], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;      (: foo (-> A B C))", _325468)
^  Unify: (272) [user] mfix_vars1(";;      (: foo (-> A B C))", _325468)
   Call: (273) [system] var(";;      (: foo (-> A B C))")
^  Redo: (272) [user] mfix_vars1(";;      (: foo (-> A B C))", _325468)
^  Unify: (272) [user] mfix_vars1(";;      (: foo (-> A B C))", '$VAR'(_330114))
   Call: (273) [system] atom(";;      (: foo (-> A B C))")
^  Redo: (272) [user] mfix_vars1(";;      (: foo (-> A B C))", _325468)
^  Unify: (272) [user] mfix_vars1(";;      (: foo (-> A B C))", _325468)
   Call: (273) [system] ";;      (: foo (-> A B C))"==true
^  Redo: (272) [user] mfix_vars1(";;      (: foo (-> A B C))", _325468)
^  Unify: (272) [user] mfix_vars1(";;      (: foo (-> A B C))", _325468)
   Call: (273) [system] ";;      (: foo (-> A B C))"==false
^  Redo: (272) [user] mfix_vars1(";;      (: foo (-> A B C))", _325468)
^  Unify: (272) [user] mfix_vars1(";;      (: foo (-> A B C))", _325468)
   Call: (273) [system] ";;      (: foo (-> A B C))"==[_339394, _339400]
^  Redo: (272) [user] mfix_vars1(";;      (: foo (-> A B C))", _325468)
^  Unify: (272) [user] mfix_vars1(";;      (: foo (-> A B C))", _325468)
   Call: (273) [system] is_list(";;      (: foo (-> A B C))")
^  Redo: (272) [user] mfix_vars1(";;      (: foo (-> A B C))", _325468)
^  Unify: (272) [user] mfix_vars1(";;      (: foo (-> A B C))", _325468)
   Call: (273) [system] string(";;      (: foo (-> A B C))")
   Exit: (273) [system] string(";;      (: foo (-> A B C))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;      (: foo (-> A B C))", _325468)
^  Unify: (272) [user] mfix_vars1(";;      (: foo (-> A B C))", _325468)
   Call: (273) [system] compound(";;      (: foo (-> A B C))")
^  Redo: (272) [user] mfix_vars1(";;      (: foo (-> A B C))", _325468)
^  Unify: (272) [user] mfix_vars1(";;      (: foo (-> A B C))", _325468)
^  Call: (273) [user] symbol(";;      (: foo (-> A B C))")
^  Unify: (273) [user] symbol(";;      (: foo (-> A B C))")
   Call: (274) [system] atom(";;      (: foo (-> A B C))")
   Fail: (274) [system] atom(";;      (: foo (-> A B C))")
^  Fail: (273) [user] symbol(";;      (: foo (-> A B C))")
^  Redo: (272) [user] mfix_vars1(";;      (: foo (-> A B C))", _325468)
   Call: (273) [system] ";;      (: foo (-> A B C))"=_325468
   Exit: (273) [system] ";;      (: foo (-> A B C))"=";;      (: foo (-> A B C))"
^  Exit: (272) [user] mfix_vars1(";;      (: foo (-> A B C))", ";;      (: foo (-> A B C))")
   Call: (272) [apply] apply:maplist_([1149, 0], _325470, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1149, 0], [_363466|_363468], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1149, _363466)
^  Unify: (273) [user] mfix_vars1(1149, _363466)
   Call: (274) [system] var(1149)
^  Redo: (273) [user] mfix_vars1(1149, _363466)
^  Unify: (273) [user] mfix_vars1(1149, '$VAR'(_368112))
   Call: (274) [system] atom(1149)
^  Redo: (273) [user] mfix_vars1(1149, _363466)
^  Unify: (273) [user] mfix_vars1(1149, _363466)
   Call: (274) [system] 1149==true
^  Redo: (273) [user] mfix_vars1(1149, _363466)
^  Unify: (273) [user] mfix_vars1(1149, _363466)
   Call: (274) [system] 1149==false
^  Redo: (273) [user] mfix_vars1(1149, _363466)
^  Unify: (273) [user] mfix_vars1(1149, _363466)
   Call: (274) [system] 1149==[_377392, _377398]
^  Redo: (273) [user] mfix_vars1(1149, _363466)
^  Unify: (273) [user] mfix_vars1(1149, _363466)
   Call: (274) [system] is_list(1149)
^  Redo: (273) [user] mfix_vars1(1149, _363466)
^  Unify: (273) [user] mfix_vars1(1149, _363466)
   Call: (274) [system] string(1149)
^  Redo: (273) [user] mfix_vars1(1149, _363466)
^  Unify: (273) [user] mfix_vars1(1149, _363466)
   Call: (274) [system] compound(1149)
^  Redo: (273) [user] mfix_vars1(1149, _363466)
^  Unify: (273) [user] mfix_vars1(1149, _363466)
^  Call: (274) [user] symbol(1149)
^  Unify: (274) [user] symbol(1149)
   Call: (275) [system] atom(1149)
   Fail: (275) [system] atom(1149)
^  Fail: (274) [user] symbol(1149)
^  Redo: (273) [user] mfix_vars1(1149, _363466)
   Call: (274) [system] 1149=_363466
   Exit: (274) [system] 1149=1149
^  Exit: (273) [user] mfix_vars1(1149, 1149)
   Call: (273) [apply] apply:maplist_([0], _363468, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_397792|_397794], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _397792)
^  Unify: (274) [user] mfix_vars1(0, _397792)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _397792)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_402438))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _397792)
^  Unify: (274) [user] mfix_vars1(0, _397792)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _397792)
^  Unify: (274) [user] mfix_vars1(0, _397792)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _397792)
^  Unify: (274) [user] mfix_vars1(0, _397792)
   Call: (275) [system] 0==[_411718, _411724]
^  Redo: (274) [user] mfix_vars1(0, _397792)
^  Unify: (274) [user] mfix_vars1(0, _397792)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _397792)
^  Unify: (274) [user] mfix_vars1(0, _397792)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _397792)
^  Unify: (274) [user] mfix_vars1(0, _397792)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _397792)
^  Unify: (274) [user] mfix_vars1(0, _397792)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _397792)
   Call: (275) [system] 0=_397792
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _397794, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1149, 0], [1149, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;      (: foo (-> A B C))", 1149, 0], [";;      (: foo (-> A B C))", 1149, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;      (: foo (-> A B C))", 1149, 0], [";;      (: foo (-> A B C))", 1149, 0])
   Call: (270) [system] compound_name_arguments(_291966, '$COMMENT', [";;      (: foo (-> A B C))", 1149, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT', [";;      (: foo (-> A B C))", 1149, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0)))
   Call: (267) [system] '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0)\=@='$COMMENT'(";;      (: foo (-> A B C))", 1149, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _286380)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _447966))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _447966))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _447966))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _447966))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _447966)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _447966)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _453552))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _453552))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _453552)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _453552)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _453552)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0)))
   Call: (267) [system] '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0)\=@='$COMMENT'(";;      (: foo (-> A B C))", 1149, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _447966)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _280768))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _280768))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _280768))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _280768))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _280768)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _280768)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _475872))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _475872))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _475872)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _475872)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _475872)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0)))
   Call: (267) [system] '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0)\=@='$COMMENT'(";;      (: foo (-> A B C))", 1149, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _280768)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0)))
   Call: (261) [system] '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0)\=@='$COMMENT'(";;      (: foo (-> A B C))", 1149, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _504650, [], _504652)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _504650, [], _504652)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _504650, [], _504652)
   Call: (258) [system] atom('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _504650, [], _504652)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _504650, [], _504652)
   Call: (258) [system] compound('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
   Exit: (258) [system] compound('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), _513966, _513968)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT', [";;      (: foo (-> A B C))", 1149, 0])
^  Call: (258) [user] subst_vars([";;      (: foo (-> A B C))", 1149, 0], _515852, [], _504652)
^  Unify: (258) [user] subst_vars([";;      (: foo (-> A B C))", 1149, 0], [";;      (: foo (-> A B C))", 1149, 0], [], [])
   Call: (259) [system] var([";;      (: foo (-> A B C))", 1149, 0])
^  Redo: (258) [user] subst_vars([";;      (: foo (-> A B C))", 1149, 0], _515852, [], _504652)
^  Unify: (258) [user] subst_vars([";;      (: foo (-> A B C))", 1149, 0], [_519588|_519590], [], _504652)
^  Call: (259) [user] subst_vars(";;      (: foo (-> A B C))", _519588, [], _520528)
^  Unify: (259) [user] subst_vars(";;      (: foo (-> A B C))", ";;      (: foo (-> A B C))", [], [])
   Call: (260) [system] var(";;      (: foo (-> A B C))")
^  Redo: (259) [user] subst_vars(";;      (: foo (-> A B C))", _5972, [], _5976)
^  Unify: (259) [user] subst_vars(";;      (: foo (-> A B C))", _5972, [], _5976)
   Call: (260) [system] atom(";;      (: foo (-> A B C))")
^  Redo: (259) [user] subst_vars(";;      (: foo (-> A B C))", _5972, [], _5976)
^  Unify: (259) [user] subst_vars(";;      (: foo (-> A B C))", _5972, [], _5976)
   Call: (260) [system] compound(";;      (: foo (-> A B C))")
^  Redo: (259) [user] subst_vars(";;      (: foo (-> A B C))", _5972, [], _5976)
^  Unify: (259) [user] subst_vars(";;      (: foo (-> A B C))", ";;      (: foo (-> A B C))", [], [])
^  Exit: (259) [user] subst_vars(";;      (: foo (-> A B C))", ";;      (: foo (-> A B C))", [], [])
^  Call: (259) [user] subst_vars([1149, 0], _5974, [], _5944)
^  Unify: (259) [user] subst_vars([1149, 0], [1149, 0], [], [])
   Call: (260) [system] var([1149, 0])
^  Redo: (259) [user] subst_vars([1149, 0], _5974, [], _5944)
^  Unify: (259) [user] subst_vars([1149, 0], [_17532|_17534], [], _5944)
^  Call: (260) [user] subst_vars(1149, _17532, [], _18472)
^  Unify: (260) [user] subst_vars(1149, 1149, [], [])
   Call: (261) [system] var(1149)
^  Redo: (260) [user] subst_vars(1149, _17532, [], _18472)
^  Unify: (260) [user] subst_vars(1149, _17532, [], _18472)
   Call: (261) [system] atom(1149)
^  Redo: (260) [user] subst_vars(1149, _17532, [], _18472)
^  Unify: (260) [user] subst_vars(1149, _17532, [], _18472)
   Call: (261) [system] compound(1149)
^  Redo: (260) [user] subst_vars(1149, _17532, [], _18472)
^  Unify: (260) [user] subst_vars(1149, 1149, [], [])
^  Exit: (260) [user] subst_vars(1149, 1149, [], [])
^  Call: (260) [user] subst_vars([0], _17534, [], _5944)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _17534, [], _5944)
^  Unify: (260) [user] subst_vars([0], [_33404|_33406], [], _5944)
^  Call: (261) [user] subst_vars(0, _33404, [], _34344)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _33404, [], _34344)
^  Unify: (261) [user] subst_vars(0, _33404, [], _34344)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _33404, [], _34344)
^  Unify: (261) [user] subst_vars(0, _33404, [], _34344)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _33404, [], _34344)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _33406, [], _5944)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _33406, [], _5944)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1149, 0], [1149, 0], [], [])
^  Exit: (258) [user] subst_vars([";;      (: foo (-> A B C))", 1149, 0], [";;      (: foo (-> A B C))", 1149, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5942, '$COMMENT', [";;      (: foo (-> A B C))", 1149, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT', [";;      (: foo (-> A B C))", 1149, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), [], [])
   Call: (257) [system] _56762=metta_file_buffer(+, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (: foo (-> A B C))", 1149, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1150, 0, 42082, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$stream_position'(42082, 1150, 0, 42082)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _109484))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _109484))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _109484)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _109484)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _109484)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _109484)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _115096))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _115096))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _115096))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _115096))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _115096)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _115096)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _120682))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _120682))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _120682)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _120682)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _120682)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _120682)
   Call: (270) [system] var('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _120682)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$VAR'(_128142))
   Call: (270) [system] atom('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _120682)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _120682)
   Call: (270) [system] '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _120682)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _120682)
   Call: (270) [system] '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _120682)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _120682)
   Call: (270) [system] '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0)==[_137422, _137428]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _120682)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _120682)
   Call: (270) [system] is_list('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _120682)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _120682)
   Call: (270) [system] string('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _120682)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _120682)
   Call: (270) [system] compound('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
   Exit: (270) [system] compound('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _147624, _147626)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT', [";;      (= (foo $a $b) c)", 1150, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;      (= (foo $a $b) c)", 1150, 0], _151366)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;      (= (foo $a $b) c)", 1150, 0], _151366)
   Call: (271) [apply] apply:maplist_([";;      (= (foo $a $b) c)", 1150, 0], _151366, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;      (= (foo $a $b) c)", 1150, 0], [_154184|_154186], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;      (= (foo $a $b) c)", _154184)
^  Unify: (272) [user] mfix_vars1(";;      (= (foo $a $b) c)", _154184)
   Call: (273) [system] var(";;      (= (foo $a $b) c)")
^  Redo: (272) [user] mfix_vars1(";;      (= (foo $a $b) c)", _154184)
^  Unify: (272) [user] mfix_vars1(";;      (= (foo $a $b) c)", '$VAR'(_158830))
   Call: (273) [system] atom(";;      (= (foo $a $b) c)")
^  Redo: (272) [user] mfix_vars1(";;      (= (foo $a $b) c)", _154184)
^  Unify: (272) [user] mfix_vars1(";;      (= (foo $a $b) c)", _154184)
   Call: (273) [system] ";;      (= (foo $a $b) c)"==true
^  Redo: (272) [user] mfix_vars1(";;      (= (foo $a $b) c)", _154184)
^  Unify: (272) [user] mfix_vars1(";;      (= (foo $a $b) c)", _154184)
   Call: (273) [system] ";;      (= (foo $a $b) c)"==false
^  Redo: (272) [user] mfix_vars1(";;      (= (foo $a $b) c)", _154184)
^  Unify: (272) [user] mfix_vars1(";;      (= (foo $a $b) c)", _154184)
   Call: (273) [system] ";;      (= (foo $a $b) c)"==[_168110, _168116]
^  Redo: (272) [user] mfix_vars1(";;      (= (foo $a $b) c)", _154184)
^  Unify: (272) [user] mfix_vars1(";;      (= (foo $a $b) c)", _154184)
   Call: (273) [system] is_list(";;      (= (foo $a $b) c)")
^  Redo: (272) [user] mfix_vars1(";;      (= (foo $a $b) c)", _154184)
^  Unify: (272) [user] mfix_vars1(";;      (= (foo $a $b) c)", _154184)
   Call: (273) [system] string(";;      (= (foo $a $b) c)")
   Exit: (273) [system] string(";;      (= (foo $a $b) c)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;      (= (foo $a $b) c)", _154184)
^  Unify: (272) [user] mfix_vars1(";;      (= (foo $a $b) c)", _154184)
   Call: (273) [system] compound(";;      (= (foo $a $b) c)")
^  Redo: (272) [user] mfix_vars1(";;      (= (foo $a $b) c)", _154184)
^  Unify: (272) [user] mfix_vars1(";;      (= (foo $a $b) c)", _154184)
^  Call: (273) [user] symbol(";;      (= (foo $a $b) c)")
^  Unify: (273) [user] symbol(";;      (= (foo $a $b) c)")
   Call: (274) [system] atom(";;      (= (foo $a $b) c)")
   Fail: (274) [system] atom(";;      (= (foo $a $b) c)")
^  Fail: (273) [user] symbol(";;      (= (foo $a $b) c)")
^  Redo: (272) [user] mfix_vars1(";;      (= (foo $a $b) c)", _154184)
   Call: (273) [system] ";;      (= (foo $a $b) c)"=_154184
   Exit: (273) [system] ";;      (= (foo $a $b) c)"=";;      (= (foo $a $b) c)"
^  Exit: (272) [user] mfix_vars1(";;      (= (foo $a $b) c)", ";;      (= (foo $a $b) c)")
   Call: (272) [apply] apply:maplist_([1150, 0], _154186, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1150, 0], [_192182|_192184], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1150, _192182)
^  Unify: (273) [user] mfix_vars1(1150, _192182)
   Call: (274) [system] var(1150)
^  Redo: (273) [user] mfix_vars1(1150, _192182)
^  Unify: (273) [user] mfix_vars1(1150, '$VAR'(_196828))
   Call: (274) [system] atom(1150)
^  Redo: (273) [user] mfix_vars1(1150, _192182)
^  Unify: (273) [user] mfix_vars1(1150, _192182)
   Call: (274) [system] 1150==true
^  Redo: (273) [user] mfix_vars1(1150, _192182)
^  Unify: (273) [user] mfix_vars1(1150, _192182)
   Call: (274) [system] 1150==false
^  Redo: (273) [user] mfix_vars1(1150, _192182)
^  Unify: (273) [user] mfix_vars1(1150, _192182)
   Call: (274) [system] 1150==[_206108, _206114]
^  Redo: (273) [user] mfix_vars1(1150, _192182)
^  Unify: (273) [user] mfix_vars1(1150, _192182)
   Call: (274) [system] is_list(1150)
^  Redo: (273) [user] mfix_vars1(1150, _192182)
^  Unify: (273) [user] mfix_vars1(1150, _192182)
   Call: (274) [system] string(1150)
^  Redo: (273) [user] mfix_vars1(1150, _192182)
^  Unify: (273) [user] mfix_vars1(1150, _192182)
   Call: (274) [system] compound(1150)
^  Redo: (273) [user] mfix_vars1(1150, _192182)
^  Unify: (273) [user] mfix_vars1(1150, _192182)
^  Call: (274) [user] symbol(1150)
^  Unify: (274) [user] symbol(1150)
   Call: (275) [system] atom(1150)
   Fail: (275) [system] atom(1150)
^  Fail: (274) [user] symbol(1150)
^  Redo: (273) [user] mfix_vars1(1150, _192182)
   Call: (274) [system] 1150=_192182
   Exit: (274) [system] 1150=1150
^  Exit: (273) [user] mfix_vars1(1150, 1150)
   Call: (273) [apply] apply:maplist_([0], _192184, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_226508|_226510], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _226508)
^  Unify: (274) [user] mfix_vars1(0, _226508)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _226508)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_231154))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _226508)
^  Unify: (274) [user] mfix_vars1(0, _226508)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _226508)
^  Unify: (274) [user] mfix_vars1(0, _226508)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _226508)
^  Unify: (274) [user] mfix_vars1(0, _226508)
   Call: (275) [system] 0==[_240434, _240440]
^  Redo: (274) [user] mfix_vars1(0, _226508)
^  Unify: (274) [user] mfix_vars1(0, _226508)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _226508)
^  Unify: (274) [user] mfix_vars1(0, _226508)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _226508)
^  Unify: (274) [user] mfix_vars1(0, _226508)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _226508)
^  Unify: (274) [user] mfix_vars1(0, _226508)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _226508)
   Call: (275) [system] 0=_226508
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _226510, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1150, 0], [1150, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;      (= (foo $a $b) c)", 1150, 0], [";;      (= (foo $a $b) c)", 1150, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;      (= (foo $a $b) c)", 1150, 0], [";;      (= (foo $a $b) c)", 1150, 0])
   Call: (270) [system] compound_name_arguments(_120682, '$COMMENT', [";;      (= (foo $a $b) c)", 1150, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT', [";;      (= (foo $a $b) c)", 1150, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0)))
   Call: (267) [system] '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0)\=@='$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _115096)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _276682))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _276682))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _276682))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _276682))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _276682)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _276682)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _282268))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _282268))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _282268)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _282268)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _282268)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0)))
   Call: (267) [system] '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0)\=@='$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _276682)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _109484))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _109484))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _109484))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _109484))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _109484)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _109484)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _304588))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _304588))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _304588)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _304588)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _304588)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0)))
   Call: (267) [system] '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0)\=@='$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _109484)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0)))
   Call: (261) [system] '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0)\=@='$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _333366, [], _333368)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _333366, [], _333368)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _333366, [], _333368)
   Call: (258) [system] atom('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _333366, [], _333368)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _333366, [], _333368)
   Call: (258) [system] compound('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
   Exit: (258) [system] compound('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), _342682, _342684)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT', [";;      (= (foo $a $b) c)", 1150, 0])
^  Call: (258) [user] subst_vars([";;      (= (foo $a $b) c)", 1150, 0], _344568, [], _333368)
^  Unify: (258) [user] subst_vars([";;      (= (foo $a $b) c)", 1150, 0], [";;      (= (foo $a $b) c)", 1150, 0], [], [])
   Call: (259) [system] var([";;      (= (foo $a $b) c)", 1150, 0])
^  Redo: (258) [user] subst_vars([";;      (= (foo $a $b) c)", 1150, 0], _344568, [], _333368)
^  Unify: (258) [user] subst_vars([";;      (= (foo $a $b) c)", 1150, 0], [_348304|_348306], [], _333368)
^  Call: (259) [user] subst_vars(";;      (= (foo $a $b) c)", _348304, [], _349244)
^  Unify: (259) [user] subst_vars(";;      (= (foo $a $b) c)", ";;      (= (foo $a $b) c)", [], [])
   Call: (260) [system] var(";;      (= (foo $a $b) c)")
^  Redo: (259) [user] subst_vars(";;      (= (foo $a $b) c)", _348304, [], _349244)
^  Unify: (259) [user] subst_vars(";;      (= (foo $a $b) c)", _348304, [], _349244)
   Call: (260) [system] atom(";;      (= (foo $a $b) c)")
^  Redo: (259) [user] subst_vars(";;      (= (foo $a $b) c)", _348304, [], _349244)
^  Unify: (259) [user] subst_vars(";;      (= (foo $a $b) c)", _348304, [], _349244)
   Call: (260) [system] compound(";;      (= (foo $a $b) c)")
^  Redo: (259) [user] subst_vars(";;      (= (foo $a $b) c)", _348304, [], _349244)
^  Unify: (259) [user] subst_vars(";;      (= (foo $a $b) c)", ";;      (= (foo $a $b) c)", [], [])
^  Exit: (259) [user] subst_vars(";;      (= (foo $a $b) c)", ";;      (= (foo $a $b) c)", [], [])
^  Call: (259) [user] subst_vars([1150, 0], _348306, [], _333368)
^  Unify: (259) [user] subst_vars([1150, 0], [1150, 0], [], [])
   Call: (260) [system] var([1150, 0])
^  Redo: (259) [user] subst_vars([1150, 0], _348306, [], _333368)
^  Unify: (259) [user] subst_vars([1150, 0], [_364176|_364178], [], _333368)
^  Call: (260) [user] subst_vars(1150, _364176, [], _365116)
^  Unify: (260) [user] subst_vars(1150, 1150, [], [])
   Call: (261) [system] var(1150)
^  Redo: (260) [user] subst_vars(1150, _364176, [], _365116)
^  Unify: (260) [user] subst_vars(1150, _364176, [], _365116)
   Call: (261) [system] atom(1150)
^  Redo: (260) [user] subst_vars(1150, _364176, [], _365116)
^  Unify: (260) [user] subst_vars(1150, _364176, [], _365116)
   Call: (261) [system] compound(1150)
^  Redo: (260) [user] subst_vars(1150, _364176, [], _365116)
^  Unify: (260) [user] subst_vars(1150, 1150, [], [])
^  Exit: (260) [user] subst_vars(1150, 1150, [], [])
^  Call: (260) [user] subst_vars([0], _364178, [], _333368)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _364178, [], _333368)
^  Unify: (260) [user] subst_vars([0], [_380048|_380050], [], _333368)
^  Call: (261) [user] subst_vars(0, _380048, [], _380988)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _380048, [], _380988)
^  Unify: (261) [user] subst_vars(0, _380048, [], _380988)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _380048, [], _380988)
^  Unify: (261) [user] subst_vars(0, _380048, [], _380988)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _380048, [], _380988)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _380050, [], _333368)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _380050, [], _333368)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1150, 0], [1150, 0], [], [])
^  Exit: (258) [user] subst_vars([";;      (= (foo $a $b) c)", 1150, 0], [";;      (= (foo $a $b) c)", 1150, 0], [], [])
   Call: (258) [system] compound_name_arguments(_333366, '$COMMENT', [";;      (= (foo $a $b) c)", 1150, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT', [";;      (= (foo $a $b) c)", 1150, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), [], [])
   Call: (257) [system] _403406=metta_file_buffer(+, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      (= (foo $a $b) c)", 1150, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1151, 0, 42108, '$COMMENT'(";;      ", 1151, 0), '$stream_position'(42108, 1151, 0, 42108)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      ", 1151, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      ", 1151, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;      ", 1151, 0), _456124))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      ", 1151, 0), _456124))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;      ", 1151, 0), _456124)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      ", 1151, 0), _456124)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;      ", 1151, 0), _456124)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;      ", 1151, 0), _456124)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;      ", 1151, 0), _461736))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      ", 1151, 0), _461736))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;      ", 1151, 0), _461736))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      ", 1151, 0), _461736))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      ", 1151, 0), _461736)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      ", 1151, 0), _461736)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;      ", 1151, 0), _467322))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      ", 1151, 0), _467322))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;      ", 1151, 0), _467322)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      ", 1151, 0), _467322)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1151, 0), _467322)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1151, 0), _467322)
   Call: (270) [system] var('$COMMENT'(";;      ", 1151, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1151, 0), _467322)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1151, 0), '$VAR'(_474782))
   Call: (270) [system] atom('$COMMENT'(";;      ", 1151, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1151, 0), _467322)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1151, 0), _467322)
   Call: (270) [system] '$COMMENT'(";;      ", 1151, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1151, 0), _467322)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1151, 0), _467322)
   Call: (270) [system] '$COMMENT'(";;      ", 1151, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1151, 0), _467322)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1151, 0), _467322)
   Call: (270) [system] '$COMMENT'(";;      ", 1151, 0)==[_484062, _484068]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1151, 0), _467322)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1151, 0), _467322)
   Call: (270) [system] is_list('$COMMENT'(";;      ", 1151, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1151, 0), _467322)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1151, 0), _467322)
   Call: (270) [system] string('$COMMENT'(";;      ", 1151, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1151, 0), _467322)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1151, 0), _467322)
   Call: (270) [system] compound('$COMMENT'(";;      ", 1151, 0))
   Exit: (270) [system] compound('$COMMENT'(";;      ", 1151, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;      ", 1151, 0), _494264, _494266)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      ", 1151, 0), '$COMMENT', [";;      ", 1151, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;      ", 1151, 0], _498006)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;      ", 1151, 0], _498006)
   Call: (271) [apply] apply:maplist_([";;      ", 1151, 0], _498006, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;      ", 1151, 0], [_500824|_500826], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;      ", _500824)
^  Unify: (272) [user] mfix_vars1(";;      ", _500824)
   Call: (273) [system] var(";;      ")
^  Redo: (272) [user] mfix_vars1(";;      ", _500824)
^  Unify: (272) [user] mfix_vars1(";;      ", '$VAR'(_505470))
   Call: (273) [system] atom(";;      ")
^  Redo: (272) [user] mfix_vars1(";;      ", _500824)
^  Unify: (272) [user] mfix_vars1(";;      ", _500824)
   Call: (273) [system] ";;      "==true
^  Redo: (272) [user] mfix_vars1(";;      ", _500824)
^  Unify: (272) [user] mfix_vars1(";;      ", _500824)
   Call: (273) [system] ";;      "==false
^  Redo: (272) [user] mfix_vars1(";;      ", _500824)
^  Unify: (272) [user] mfix_vars1(";;      ", _500824)
   Call: (273) [system] ";;      "==[_514750, _514756]
^  Redo: (272) [user] mfix_vars1(";;      ", _500824)
^  Unify: (272) [user] mfix_vars1(";;      ", _500824)
   Call: (273) [system] is_list(";;      ")
^  Redo: (272) [user] mfix_vars1(";;      ", _500824)
^  Unify: (272) [user] mfix_vars1(";;      ", _500824)
   Call: (273) [system] string(";;      ")
   Exit: (273) [system] string(";;      ")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;      ", _6024)
^  Unify: (272) [user] mfix_vars1(";;      ", _6024)
   Call: (273) [system] compound(";;      ")
^  Redo: (272) [user] mfix_vars1(";;      ", _6024)
^  Unify: (272) [user] mfix_vars1(";;      ", _6024)
^  Call: (273) [user] symbol(";;      ")
^  Unify: (273) [user] symbol(";;      ")
   Call: (274) [system] atom(";;      ")
   Fail: (274) [system] atom(";;      ")
^  Fail: (273) [user] symbol(";;      ")
^  Redo: (272) [user] mfix_vars1(";;      ", _6024)
   Call: (273) [system] ";;      "=_6024
   Exit: (273) [system] ";;      "=";;      "
^  Exit: (272) [user] mfix_vars1(";;      ", ";;      ")
   Call: (272) [apply] apply:maplist_([1151, 0], _6026, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1151, 0], [_20800|_20802], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1151, _20800)
^  Unify: (273) [user] mfix_vars1(1151, _20800)
   Call: (274) [system] var(1151)
^  Redo: (273) [user] mfix_vars1(1151, _20800)
^  Unify: (273) [user] mfix_vars1(1151, '$VAR'(_25446))
   Call: (274) [system] atom(1151)
^  Redo: (273) [user] mfix_vars1(1151, _20800)
^  Unify: (273) [user] mfix_vars1(1151, _20800)
   Call: (274) [system] 1151==true
^  Redo: (273) [user] mfix_vars1(1151, _20800)
^  Unify: (273) [user] mfix_vars1(1151, _20800)
   Call: (274) [system] 1151==false
^  Redo: (273) [user] mfix_vars1(1151, _20800)
^  Unify: (273) [user] mfix_vars1(1151, _20800)
   Call: (274) [system] 1151==[_34726, _34732]
^  Redo: (273) [user] mfix_vars1(1151, _20800)
^  Unify: (273) [user] mfix_vars1(1151, _20800)
   Call: (274) [system] is_list(1151)
^  Redo: (273) [user] mfix_vars1(1151, _20800)
^  Unify: (273) [user] mfix_vars1(1151, _20800)
   Call: (274) [system] string(1151)
^  Redo: (273) [user] mfix_vars1(1151, _20800)
^  Unify: (273) [user] mfix_vars1(1151, _20800)
   Call: (274) [system] compound(1151)
^  Redo: (273) [user] mfix_vars1(1151, _20800)
^  Unify: (273) [user] mfix_vars1(1151, _20800)
^  Call: (274) [user] symbol(1151)
^  Unify: (274) [user] symbol(1151)
   Call: (275) [system] atom(1151)
   Fail: (275) [system] atom(1151)
^  Fail: (274) [user] symbol(1151)
^  Redo: (273) [user] mfix_vars1(1151, _20800)
   Call: (274) [system] 1151=_20800
   Exit: (274) [system] 1151=1151
^  Exit: (273) [user] mfix_vars1(1151, 1151)
   Call: (273) [apply] apply:maplist_([0], _20802, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_55126|_55128], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _55126)
^  Unify: (274) [user] mfix_vars1(0, _55126)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _55126)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_59772))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _55126)
^  Unify: (274) [user] mfix_vars1(0, _55126)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _55126)
^  Unify: (274) [user] mfix_vars1(0, _55126)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _55126)
^  Unify: (274) [user] mfix_vars1(0, _55126)
   Call: (275) [system] 0==[_69052, _69058]
^  Redo: (274) [user] mfix_vars1(0, _55126)
^  Unify: (274) [user] mfix_vars1(0, _55126)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _55126)
^  Unify: (274) [user] mfix_vars1(0, _55126)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _55126)
^  Unify: (274) [user] mfix_vars1(0, _55126)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _55126)
^  Unify: (274) [user] mfix_vars1(0, _55126)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _55126)
   Call: (275) [system] 0=_55126
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _55128, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1151, 0], [1151, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;      ", 1151, 0], [";;      ", 1151, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;      ", 1151, 0], [";;      ", 1151, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";;      ", 1151, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      ", 1151, 0), '$COMMENT', [";;      ", 1151, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0)))
   Call: (267) [system] '$COMMENT'(";;      ", 1151, 0)\=@='$COMMENT'(";;      ", 1151, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      ", 1151, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;      ", 1151, 0), _105300))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      ", 1151, 0), _105300))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;      ", 1151, 0), _105300))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      ", 1151, 0), _105300))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;      ", 1151, 0), _105300)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      ", 1151, 0), _105300)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;      ", 1151, 0), _110886))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      ", 1151, 0), _110886))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;      ", 1151, 0), _110886)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      ", 1151, 0), _110886)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;      ", 1151, 0), _110886)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0)))
   Call: (267) [system] '$COMMENT'(";;      ", 1151, 0)\=@='$COMMENT'(";;      ", 1151, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;      ", 1151, 0), _105300)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;      ", 1151, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      ", 1151, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;      ", 1151, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      ", 1151, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;      ", 1151, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      ", 1151, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;      ", 1151, 0), _133206))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      ", 1151, 0), _133206))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;      ", 1151, 0), _133206)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      ", 1151, 0), _133206)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;      ", 1151, 0), _133206)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0)))
   Call: (267) [system] '$COMMENT'(";;      ", 1151, 0)\=@='$COMMENT'(";;      ", 1151, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;      ", 1151, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0)))
   Call: (261) [system] '$COMMENT'(";;      ", 1151, 0)\=@='$COMMENT'(";;      ", 1151, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      ", 1151, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      ", 1151, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      ", 1151, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      ", 1151, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      ", 1151, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;      ", 1151, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;      ", 1151, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;      ", 1151, 0), _161984, [], _161986)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;      ", 1151, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      ", 1151, 0), _161984, [], _161986)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      ", 1151, 0), _161984, [], _161986)
   Call: (258) [system] atom('$COMMENT'(";;      ", 1151, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      ", 1151, 0), _161984, [], _161986)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      ", 1151, 0), _161984, [], _161986)
   Call: (258) [system] compound('$COMMENT'(";;      ", 1151, 0))
   Exit: (258) [system] compound('$COMMENT'(";;      ", 1151, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;      ", 1151, 0), _171300, _171302)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      ", 1151, 0), '$COMMENT', [";;      ", 1151, 0])
^  Call: (258) [user] subst_vars([";;      ", 1151, 0], _173186, [], _161986)
^  Unify: (258) [user] subst_vars([";;      ", 1151, 0], [";;      ", 1151, 0], [], [])
   Call: (259) [system] var([";;      ", 1151, 0])
^  Redo: (258) [user] subst_vars([";;      ", 1151, 0], _173186, [], _161986)
^  Unify: (258) [user] subst_vars([";;      ", 1151, 0], [_176922|_176924], [], _161986)
^  Call: (259) [user] subst_vars(";;      ", _176922, [], _177862)
^  Unify: (259) [user] subst_vars(";;      ", ";;      ", [], [])
   Call: (260) [system] var(";;      ")
^  Redo: (259) [user] subst_vars(";;      ", _176922, [], _177862)
^  Unify: (259) [user] subst_vars(";;      ", _176922, [], _177862)
   Call: (260) [system] atom(";;      ")
^  Redo: (259) [user] subst_vars(";;      ", _176922, [], _177862)
^  Unify: (259) [user] subst_vars(";;      ", _176922, [], _177862)
   Call: (260) [system] compound(";;      ")
^  Redo: (259) [user] subst_vars(";;      ", _176922, [], _177862)
^  Unify: (259) [user] subst_vars(";;      ", ";;      ", [], [])
^  Exit: (259) [user] subst_vars(";;      ", ";;      ", [], [])
^  Call: (259) [user] subst_vars([1151, 0], _176924, [], _161986)
^  Unify: (259) [user] subst_vars([1151, 0], [1151, 0], [], [])
   Call: (260) [system] var([1151, 0])
^  Redo: (259) [user] subst_vars([1151, 0], _176924, [], _161986)
^  Unify: (259) [user] subst_vars([1151, 0], [_192794|_192796], [], _161986)
^  Call: (260) [user] subst_vars(1151, _192794, [], _193734)
^  Unify: (260) [user] subst_vars(1151, 1151, [], [])
   Call: (261) [system] var(1151)
^  Redo: (260) [user] subst_vars(1151, _192794, [], _193734)
^  Unify: (260) [user] subst_vars(1151, _192794, [], _193734)
   Call: (261) [system] atom(1151)
^  Redo: (260) [user] subst_vars(1151, _192794, [], _193734)
^  Unify: (260) [user] subst_vars(1151, _192794, [], _193734)
   Call: (261) [system] compound(1151)
^  Redo: (260) [user] subst_vars(1151, _192794, [], _193734)
^  Unify: (260) [user] subst_vars(1151, 1151, [], [])
^  Exit: (260) [user] subst_vars(1151, 1151, [], [])
^  Call: (260) [user] subst_vars([0], _192796, [], _161986)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _192796, [], _161986)
^  Unify: (260) [user] subst_vars([0], [_208666|_208668], [], _161986)
^  Call: (261) [user] subst_vars(0, _208666, [], _209606)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _208666, [], _209606)
^  Unify: (261) [user] subst_vars(0, _208666, [], _209606)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _208666, [], _209606)
^  Unify: (261) [user] subst_vars(0, _208666, [], _209606)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _208666, [], _209606)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _208668, [], _161986)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _208668, [], _161986)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1151, 0], [1151, 0], [], [])
^  Exit: (258) [user] subst_vars([";;      ", 1151, 0], [";;      ", 1151, 0], [], [])
   Call: (258) [system] compound_name_arguments(_161984, '$COMMENT', [";;      ", 1151, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      ", 1151, 0), '$COMMENT', [";;      ", 1151, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;      ", 1151, 0), '$COMMENT'(";;      ", 1151, 0), [], [])
   Call: (257) [system] _232024=metta_file_buffer(+, '$COMMENT'(";;      ", 1151, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;      ", 1151, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;      ", 1151, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      ", 1151, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      ", 1151, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      ", 1151, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      ", 1151, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      ", 1151, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      ", 1151, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1152, 0, 42117, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$stream_position'(42117, 1152, 0, 42117)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _284750))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _284750))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _284750)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _284750)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _284750)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _284750)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _290362))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _290362))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _290362))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _290362))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _290362)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _290362)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _295948))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _295948))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _295948)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _295948)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _295948)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _295948)
   Call: (270) [system] var('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _295948)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$VAR'(_303408))
   Call: (270) [system] atom('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _295948)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _295948)
   Call: (270) [system] '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _295948)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _295948)
   Call: (270) [system] '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _295948)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _295948)
   Call: (270) [system] '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0)==[_312688, _312694]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _295948)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _295948)
   Call: (270) [system] is_list('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _295948)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _295948)
   Call: (270) [system] string('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _295948)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _295948)
   Call: (270) [system] compound('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
   Exit: (270) [system] compound('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _322890, _322892)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT', [";;      !(metta (foo a b) %Undefined% &self)", 1152, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;      !(metta (foo a b) %Undefined% &self)", 1152, 0], _326632)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;      !(metta (foo a b) %Undefined% &self)", 1152, 0], _326632)
   Call: (271) [apply] apply:maplist_([";;      !(metta (foo a b) %Undefined% &self)", 1152, 0], _326632, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;      !(metta (foo a b) %Undefined% &self)", 1152, 0], [_329450|_329452], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;      !(metta (foo a b) %Undefined% &self)", _329450)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (foo a b) %Undefined% &self)", _329450)
   Call: (273) [system] var(";;      !(metta (foo a b) %Undefined% &self)")
^  Redo: (272) [user] mfix_vars1(";;      !(metta (foo a b) %Undefined% &self)", _329450)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (foo a b) %Undefined% &self)", '$VAR'(_334096))
   Call: (273) [system] atom(";;      !(metta (foo a b) %Undefined% &self)")
^  Redo: (272) [user] mfix_vars1(";;      !(metta (foo a b) %Undefined% &self)", _329450)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (foo a b) %Undefined% &self)", _329450)
   Call: (273) [system] ";;      !(metta (foo a b) %Undefined% &self)"==true
^  Redo: (272) [user] mfix_vars1(";;      !(metta (foo a b) %Undefined% &self)", _329450)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (foo a b) %Undefined% &self)", _329450)
   Call: (273) [system] ";;      !(metta (foo a b) %Undefined% &self)"==false
^  Redo: (272) [user] mfix_vars1(";;      !(metta (foo a b) %Undefined% &self)", _329450)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (foo a b) %Undefined% &self)", _329450)
   Call: (273) [system] ";;      !(metta (foo a b) %Undefined% &self)"==[_343376, _343382]
^  Redo: (272) [user] mfix_vars1(";;      !(metta (foo a b) %Undefined% &self)", _329450)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (foo a b) %Undefined% &self)", _329450)
   Call: (273) [system] is_list(";;      !(metta (foo a b) %Undefined% &self)")
^  Redo: (272) [user] mfix_vars1(";;      !(metta (foo a b) %Undefined% &self)", _329450)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (foo a b) %Undefined% &self)", _329450)
   Call: (273) [system] string(";;      !(metta (foo a b) %Undefined% &self)")
   Exit: (273) [system] string(";;      !(metta (foo a b) %Undefined% &self)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;      !(metta (foo a b) %Undefined% &self)", _329450)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (foo a b) %Undefined% &self)", _329450)
   Call: (273) [system] compound(";;      !(metta (foo a b) %Undefined% &self)")
^  Redo: (272) [user] mfix_vars1(";;      !(metta (foo a b) %Undefined% &self)", _329450)
^  Unify: (272) [user] mfix_vars1(";;      !(metta (foo a b) %Undefined% &self)", _329450)
^  Call: (273) [user] symbol(";;      !(metta (foo a b) %Undefined% &self)")
^  Unify: (273) [user] symbol(";;      !(metta (foo a b) %Undefined% &self)")
   Call: (274) [system] atom(";;      !(metta (foo a b) %Undefined% &self)")
   Fail: (274) [system] atom(";;      !(metta (foo a b) %Undefined% &self)")
^  Fail: (273) [user] symbol(";;      !(metta (foo a b) %Undefined% &self)")
^  Redo: (272) [user] mfix_vars1(";;      !(metta (foo a b) %Undefined% &self)", _329450)
   Call: (273) [system] ";;      !(metta (foo a b) %Undefined% &self)"=_329450
   Exit: (273) [system] ";;      !(metta (foo a b) %Undefined% &self)"=";;      !(metta (foo a b) %Undefined% &self)"
^  Exit: (272) [user] mfix_vars1(";;      !(metta (foo a b) %Undefined% &self)", ";;      !(metta (foo a b) %Undefined% &self)")
   Call: (272) [apply] apply:maplist_([1152, 0], _329452, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1152, 0], [_367448|_367450], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1152, _367448)
^  Unify: (273) [user] mfix_vars1(1152, _367448)
   Call: (274) [system] var(1152)
^  Redo: (273) [user] mfix_vars1(1152, _367448)
^  Unify: (273) [user] mfix_vars1(1152, '$VAR'(_372094))
   Call: (274) [system] atom(1152)
^  Redo: (273) [user] mfix_vars1(1152, _367448)
^  Unify: (273) [user] mfix_vars1(1152, _367448)
   Call: (274) [system] 1152==true
^  Redo: (273) [user] mfix_vars1(1152, _367448)
^  Unify: (273) [user] mfix_vars1(1152, _367448)
   Call: (274) [system] 1152==false
^  Redo: (273) [user] mfix_vars1(1152, _367448)
^  Unify: (273) [user] mfix_vars1(1152, _367448)
   Call: (274) [system] 1152==[_381374, _381380]
^  Redo: (273) [user] mfix_vars1(1152, _367448)
^  Unify: (273) [user] mfix_vars1(1152, _367448)
   Call: (274) [system] is_list(1152)
^  Redo: (273) [user] mfix_vars1(1152, _367448)
^  Unify: (273) [user] mfix_vars1(1152, _367448)
   Call: (274) [system] string(1152)
^  Redo: (273) [user] mfix_vars1(1152, _367448)
^  Unify: (273) [user] mfix_vars1(1152, _367448)
   Call: (274) [system] compound(1152)
^  Redo: (273) [user] mfix_vars1(1152, _367448)
^  Unify: (273) [user] mfix_vars1(1152, _367448)
^  Call: (274) [user] symbol(1152)
^  Unify: (274) [user] symbol(1152)
   Call: (275) [system] atom(1152)
   Fail: (275) [system] atom(1152)
^  Fail: (274) [user] symbol(1152)
^  Redo: (273) [user] mfix_vars1(1152, _367448)
   Call: (274) [system] 1152=_367448
   Exit: (274) [system] 1152=1152
^  Exit: (273) [user] mfix_vars1(1152, 1152)
   Call: (273) [apply] apply:maplist_([0], _367450, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_401774|_401776], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _401774)
^  Unify: (274) [user] mfix_vars1(0, _401774)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _401774)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_406420))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _401774)
^  Unify: (274) [user] mfix_vars1(0, _401774)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _401774)
^  Unify: (274) [user] mfix_vars1(0, _401774)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _401774)
^  Unify: (274) [user] mfix_vars1(0, _401774)
   Call: (275) [system] 0==[_415700, _415706]
^  Redo: (274) [user] mfix_vars1(0, _401774)
^  Unify: (274) [user] mfix_vars1(0, _401774)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _401774)
^  Unify: (274) [user] mfix_vars1(0, _401774)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _401774)
^  Unify: (274) [user] mfix_vars1(0, _401774)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _401774)
^  Unify: (274) [user] mfix_vars1(0, _401774)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _401774)
   Call: (275) [system] 0=_401774
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _401776, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1152, 0], [1152, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;      !(metta (foo a b) %Undefined% &self)", 1152, 0], [";;      !(metta (foo a b) %Undefined% &self)", 1152, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;      !(metta (foo a b) %Undefined% &self)", 1152, 0], [";;      !(metta (foo a b) %Undefined% &self)", 1152, 0])
   Call: (270) [system] compound_name_arguments(_295948, '$COMMENT', [";;      !(metta (foo a b) %Undefined% &self)", 1152, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT', [";;      !(metta (foo a b) %Undefined% &self)", 1152, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0)))
   Call: (267) [system] '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0)\=@='$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _290362)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _451948))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _451948))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _451948))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _451948))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _451948)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _451948)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _457534))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _457534))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _457534)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _457534)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _457534)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0)))
   Call: (267) [system] '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0)\=@='$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _451948)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _284750))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _284750))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _284750))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _284750))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _284750)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _284750)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _479854))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _479854))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _479854)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _479854)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _479854)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0)))
   Call: (267) [system] '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0)\=@='$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _284750)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0)))
   Call: (261) [system] '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0)\=@='$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _508632, [], _508634)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _508632, [], _508634)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _508632, [], _508634)
   Call: (258) [system] atom('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _508632, [], _508634)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _508632, [], _508634)
   Call: (258) [system] compound('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
   Exit: (258) [system] compound('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), _517948, _517950)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT', [";;      !(metta (foo a b) %Undefined% &self)", 1152, 0])
^  Call: (258) [user] subst_vars([";;      !(metta (foo a b) %Undefined% &self)", 1152, 0], _519834, [], _508634)
^  Unify: (258) [user] subst_vars([";;      !(metta (foo a b) %Undefined% &self)", 1152, 0], [";;      !(metta (foo a b) %Undefined% &self)", 1152, 0], [], [])
   Call: (259) [system] var([";;      !(metta (foo a b) %Undefined% &self)", 1152, 0])
^  Redo: (258) [user] subst_vars([";;      !(metta (foo a b) %Undefined% &self)", 1152, 0], _519834, [], _508634)
^  Unify: (258) [user] subst_vars([";;      !(metta (foo a b) %Undefined% &self)", 1152, 0], [_5978|_5980], [], _5948)
^  Call: (259) [user] subst_vars(";;      !(metta (foo a b) %Undefined% &self)", _5978, [], _6582)
^  Unify: (259) [user] subst_vars(";;      !(metta (foo a b) %Undefined% &self)", ";;      !(metta (foo a b) %Undefined% &self)", [], [])
   Call: (260) [system] var(";;      !(metta (foo a b) %Undefined% &self)")
^  Redo: (259) [user] subst_vars(";;      !(metta (foo a b) %Undefined% &self)", _5978, [], _6582)
^  Unify: (259) [user] subst_vars(";;      !(metta (foo a b) %Undefined% &self)", _5978, [], _6582)
   Call: (260) [system] atom(";;      !(metta (foo a b) %Undefined% &self)")
^  Redo: (259) [user] subst_vars(";;      !(metta (foo a b) %Undefined% &self)", _5978, [], _6582)
^  Unify: (259) [user] subst_vars(";;      !(metta (foo a b) %Undefined% &self)", _5978, [], _6582)
   Call: (260) [system] compound(";;      !(metta (foo a b) %Undefined% &self)")
^  Redo: (259) [user] subst_vars(";;      !(metta (foo a b) %Undefined% &self)", _5978, [], _6582)
^  Unify: (259) [user] subst_vars(";;      !(metta (foo a b) %Undefined% &self)", ";;      !(metta (foo a b) %Undefined% &self)", [], [])
^  Exit: (259) [user] subst_vars(";;      !(metta (foo a b) %Undefined% &self)", ";;      !(metta (foo a b) %Undefined% &self)", [], [])
^  Call: (259) [user] subst_vars([1152, 0], _5980, [], _5948)
^  Unify: (259) [user] subst_vars([1152, 0], [1152, 0], [], [])
   Call: (260) [system] var([1152, 0])
^  Redo: (259) [user] subst_vars([1152, 0], _5980, [], _5948)
^  Unify: (259) [user] subst_vars([1152, 0], [_21514|_21516], [], _5948)
^  Call: (260) [user] subst_vars(1152, _21514, [], _22454)
^  Unify: (260) [user] subst_vars(1152, 1152, [], [])
   Call: (261) [system] var(1152)
^  Redo: (260) [user] subst_vars(1152, _21514, [], _22454)
^  Unify: (260) [user] subst_vars(1152, _21514, [], _22454)
   Call: (261) [system] atom(1152)
^  Redo: (260) [user] subst_vars(1152, _21514, [], _22454)
^  Unify: (260) [user] subst_vars(1152, _21514, [], _22454)
   Call: (261) [system] compound(1152)
^  Redo: (260) [user] subst_vars(1152, _21514, [], _22454)
^  Unify: (260) [user] subst_vars(1152, 1152, [], [])
^  Exit: (260) [user] subst_vars(1152, 1152, [], [])
^  Call: (260) [user] subst_vars([0], _21516, [], _5948)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _21516, [], _5948)
^  Unify: (260) [user] subst_vars([0], [_37386|_37388], [], _5948)
^  Call: (261) [user] subst_vars(0, _37386, [], _38326)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _37386, [], _38326)
^  Unify: (261) [user] subst_vars(0, _37386, [], _38326)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _37386, [], _38326)
^  Unify: (261) [user] subst_vars(0, _37386, [], _38326)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _37386, [], _38326)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _37388, [], _5948)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _37388, [], _5948)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1152, 0], [1152, 0], [], [])
^  Exit: (258) [user] subst_vars([";;      !(metta (foo a b) %Undefined% &self)", 1152, 0], [";;      !(metta (foo a b) %Undefined% &self)", 1152, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5946, '$COMMENT', [";;      !(metta (foo a b) %Undefined% &self)", 1152, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT', [";;      !(metta (foo a b) %Undefined% &self)", 1152, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), [], [])
   Call: (257) [system] _60744=metta_file_buffer(+, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;      !(metta (foo a b) %Undefined% &self)", 1152, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1153, 0, 42162, '$COMMENT'(";;     \";", 1153, 0), '$stream_position'(42162, 1153, 0, 42162)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \";", 1153, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \";", 1153, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     \";", 1153, 0), _113462))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     \";", 1153, 0), _113462))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     \";", 1153, 0), _113462)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     \";", 1153, 0), _113462)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     \";", 1153, 0), _113462)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     \";", 1153, 0), _113462)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     \";", 1153, 0), _119074))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     \";", 1153, 0), _119074))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     \";", 1153, 0), _119074))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     \";", 1153, 0), _119074))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \";", 1153, 0), _119074)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \";", 1153, 0), _119074)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     \";", 1153, 0), _124660))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     \";", 1153, 0), _124660))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     \";", 1153, 0), _124660)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     \";", 1153, 0), _124660)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1153, 0), _124660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1153, 0), _124660)
   Call: (270) [system] var('$COMMENT'(";;     \";", 1153, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1153, 0), _124660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1153, 0), '$VAR'(_132120))
   Call: (270) [system] atom('$COMMENT'(";;     \";", 1153, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1153, 0), _124660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1153, 0), _124660)
   Call: (270) [system] '$COMMENT'(";;     \";", 1153, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1153, 0), _124660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1153, 0), _124660)
   Call: (270) [system] '$COMMENT'(";;     \";", 1153, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1153, 0), _124660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1153, 0), _124660)
   Call: (270) [system] '$COMMENT'(";;     \";", 1153, 0)==[_141400, _141406]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1153, 0), _124660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1153, 0), _124660)
   Call: (270) [system] is_list('$COMMENT'(";;     \";", 1153, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1153, 0), _124660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1153, 0), _124660)
   Call: (270) [system] string('$COMMENT'(";;     \";", 1153, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1153, 0), _124660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1153, 0), _124660)
   Call: (270) [system] compound('$COMMENT'(";;     \";", 1153, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     \";", 1153, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     \";", 1153, 0), _151602, _151604)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     \";", 1153, 0), '$COMMENT', [";;     \";", 1153, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     \";", 1153, 0], _155344)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     \";", 1153, 0], _155344)
   Call: (271) [apply] apply:maplist_([";;     \";", 1153, 0], _155344, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     \";", 1153, 0], [_158162|_158164], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     \";", _158162)
^  Unify: (272) [user] mfix_vars1(";;     \";", _158162)
   Call: (273) [system] var(";;     \";")
^  Redo: (272) [user] mfix_vars1(";;     \";", _158162)
^  Unify: (272) [user] mfix_vars1(";;     \";", '$VAR'(_162808))
   Call: (273) [system] atom(";;     \";")
^  Redo: (272) [user] mfix_vars1(";;     \";", _158162)
^  Unify: (272) [user] mfix_vars1(";;     \";", _158162)
   Call: (273) [system] ";;     \";"==true
^  Redo: (272) [user] mfix_vars1(";;     \";", _158162)
^  Unify: (272) [user] mfix_vars1(";;     \";", _158162)
   Call: (273) [system] ";;     \";"==false
^  Redo: (272) [user] mfix_vars1(";;     \";", _158162)
^  Unify: (272) [user] mfix_vars1(";;     \";", _158162)
   Call: (273) [system] ";;     \";"==[_172088, _172094]
^  Redo: (272) [user] mfix_vars1(";;     \";", _158162)
^  Unify: (272) [user] mfix_vars1(";;     \";", _158162)
   Call: (273) [system] is_list(";;     \";")
^  Redo: (272) [user] mfix_vars1(";;     \";", _158162)
^  Unify: (272) [user] mfix_vars1(";;     \";", _158162)
   Call: (273) [system] string(";;     \";")
   Exit: (273) [system] string(";;     \";")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     \";", _158162)
^  Unify: (272) [user] mfix_vars1(";;     \";", _158162)
   Call: (273) [system] compound(";;     \";")
^  Redo: (272) [user] mfix_vars1(";;     \";", _158162)
^  Unify: (272) [user] mfix_vars1(";;     \";", _158162)
^  Call: (273) [user] symbol(";;     \";")
^  Unify: (273) [user] symbol(";;     \";")
   Call: (274) [system] atom(";;     \";")
   Fail: (274) [system] atom(";;     \";")
^  Fail: (273) [user] symbol(";;     \";")
^  Redo: (272) [user] mfix_vars1(";;     \";", _158162)
   Call: (273) [system] ";;     \";"=_158162
   Exit: (273) [system] ";;     \";"=";;     \";"
^  Exit: (272) [user] mfix_vars1(";;     \";", ";;     \";")
   Call: (272) [apply] apply:maplist_([1153, 0], _158164, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1153, 0], [_196160|_196162], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1153, _196160)
^  Unify: (273) [user] mfix_vars1(1153, _196160)
   Call: (274) [system] var(1153)
^  Redo: (273) [user] mfix_vars1(1153, _196160)
^  Unify: (273) [user] mfix_vars1(1153, '$VAR'(_200806))
   Call: (274) [system] atom(1153)
^  Redo: (273) [user] mfix_vars1(1153, _196160)
^  Unify: (273) [user] mfix_vars1(1153, _196160)
   Call: (274) [system] 1153==true
^  Redo: (273) [user] mfix_vars1(1153, _196160)
^  Unify: (273) [user] mfix_vars1(1153, _196160)
   Call: (274) [system] 1153==false
^  Redo: (273) [user] mfix_vars1(1153, _196160)
^  Unify: (273) [user] mfix_vars1(1153, _196160)
   Call: (274) [system] 1153==[_210086, _210092]
^  Redo: (273) [user] mfix_vars1(1153, _196160)
^  Unify: (273) [user] mfix_vars1(1153, _196160)
   Call: (274) [system] is_list(1153)
^  Redo: (273) [user] mfix_vars1(1153, _196160)
^  Unify: (273) [user] mfix_vars1(1153, _196160)
   Call: (274) [system] string(1153)
^  Redo: (273) [user] mfix_vars1(1153, _196160)
^  Unify: (273) [user] mfix_vars1(1153, _196160)
   Call: (274) [system] compound(1153)
^  Redo: (273) [user] mfix_vars1(1153, _196160)
^  Unify: (273) [user] mfix_vars1(1153, _196160)
^  Call: (274) [user] symbol(1153)
^  Unify: (274) [user] symbol(1153)
   Call: (275) [system] atom(1153)
   Fail: (275) [system] atom(1153)
^  Fail: (274) [user] symbol(1153)
^  Redo: (273) [user] mfix_vars1(1153, _196160)
   Call: (274) [system] 1153=_196160
   Exit: (274) [system] 1153=1153
^  Exit: (273) [user] mfix_vars1(1153, 1153)
   Call: (273) [apply] apply:maplist_([0], _196162, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_230486|_230488], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _230486)
^  Unify: (274) [user] mfix_vars1(0, _230486)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _230486)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_235132))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _230486)
^  Unify: (274) [user] mfix_vars1(0, _230486)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _230486)
^  Unify: (274) [user] mfix_vars1(0, _230486)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _230486)
^  Unify: (274) [user] mfix_vars1(0, _230486)
   Call: (275) [system] 0==[_244412, _244418]
^  Redo: (274) [user] mfix_vars1(0, _230486)
^  Unify: (274) [user] mfix_vars1(0, _230486)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _230486)
^  Unify: (274) [user] mfix_vars1(0, _230486)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _230486)
^  Unify: (274) [user] mfix_vars1(0, _230486)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _230486)
^  Unify: (274) [user] mfix_vars1(0, _230486)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _230486)
   Call: (275) [system] 0=_230486
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _230488, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1153, 0], [1153, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     \";", 1153, 0], [";;     \";", 1153, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     \";", 1153, 0], [";;     \";", 1153, 0])
   Call: (270) [system] compound_name_arguments(_124660, '$COMMENT', [";;     \";", 1153, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     \";", 1153, 0), '$COMMENT', [";;     \";", 1153, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0)))
   Call: (267) [system] '$COMMENT'(";;     \";", 1153, 0)\=@='$COMMENT'(";;     \";", 1153, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \";", 1153, 0), _119074)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     \";", 1153, 0), _280660))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     \";", 1153, 0), _280660))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     \";", 1153, 0), _280660))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     \";", 1153, 0), _280660))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \";", 1153, 0), _280660)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \";", 1153, 0), _280660)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     \";", 1153, 0), _286246))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     \";", 1153, 0), _286246))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     \";", 1153, 0), _286246)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     \";", 1153, 0), _286246)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     \";", 1153, 0), _286246)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0)))
   Call: (267) [system] '$COMMENT'(";;     \";", 1153, 0)\=@='$COMMENT'(";;     \";", 1153, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \";", 1153, 0), _280660)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     \";", 1153, 0), _113462))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     \";", 1153, 0), _113462))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     \";", 1153, 0), _113462))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     \";", 1153, 0), _113462))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \";", 1153, 0), _113462)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \";", 1153, 0), _113462)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     \";", 1153, 0), _308566))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     \";", 1153, 0), _308566))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     \";", 1153, 0), _308566)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     \";", 1153, 0), _308566)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     \";", 1153, 0), _308566)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0)))
   Call: (267) [system] '$COMMENT'(";;     \";", 1153, 0)\=@='$COMMENT'(";;     \";", 1153, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \";", 1153, 0), _113462)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0)))
   Call: (261) [system] '$COMMENT'(";;     \";", 1153, 0)\=@='$COMMENT'(";;     \";", 1153, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \";", 1153, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1153, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1153, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1153, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1153, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1153, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1153, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     \";", 1153, 0), _337344, [], _337346)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     \";", 1153, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     \";", 1153, 0), _337344, [], _337346)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \";", 1153, 0), _337344, [], _337346)
   Call: (258) [system] atom('$COMMENT'(";;     \";", 1153, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     \";", 1153, 0), _337344, [], _337346)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \";", 1153, 0), _337344, [], _337346)
   Call: (258) [system] compound('$COMMENT'(";;     \";", 1153, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     \";", 1153, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     \";", 1153, 0), _346660, _346662)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     \";", 1153, 0), '$COMMENT', [";;     \";", 1153, 0])
^  Call: (258) [user] subst_vars([";;     \";", 1153, 0], _348546, [], _337346)
^  Unify: (258) [user] subst_vars([";;     \";", 1153, 0], [";;     \";", 1153, 0], [], [])
   Call: (259) [system] var([";;     \";", 1153, 0])
^  Redo: (258) [user] subst_vars([";;     \";", 1153, 0], _348546, [], _337346)
^  Unify: (258) [user] subst_vars([";;     \";", 1153, 0], [_352282|_352284], [], _337346)
^  Call: (259) [user] subst_vars(";;     \";", _352282, [], _353222)
^  Unify: (259) [user] subst_vars(";;     \";", ";;     \";", [], [])
   Call: (260) [system] var(";;     \";")
^  Redo: (259) [user] subst_vars(";;     \";", _352282, [], _353222)
^  Unify: (259) [user] subst_vars(";;     \";", _352282, [], _353222)
   Call: (260) [system] atom(";;     \";")
^  Redo: (259) [user] subst_vars(";;     \";", _352282, [], _353222)
^  Unify: (259) [user] subst_vars(";;     \";", _352282, [], _353222)
   Call: (260) [system] compound(";;     \";")
^  Redo: (259) [user] subst_vars(";;     \";", _352282, [], _353222)
^  Unify: (259) [user] subst_vars(";;     \";", ";;     \";", [], [])
^  Exit: (259) [user] subst_vars(";;     \";", ";;     \";", [], [])
^  Call: (259) [user] subst_vars([1153, 0], _352284, [], _337346)
^  Unify: (259) [user] subst_vars([1153, 0], [1153, 0], [], [])
   Call: (260) [system] var([1153, 0])
^  Redo: (259) [user] subst_vars([1153, 0], _352284, [], _337346)
^  Unify: (259) [user] subst_vars([1153, 0], [_368154|_368156], [], _337346)
^  Call: (260) [user] subst_vars(1153, _368154, [], _369094)
^  Unify: (260) [user] subst_vars(1153, 1153, [], [])
   Call: (261) [system] var(1153)
^  Redo: (260) [user] subst_vars(1153, _368154, [], _369094)
^  Unify: (260) [user] subst_vars(1153, _368154, [], _369094)
   Call: (261) [system] atom(1153)
^  Redo: (260) [user] subst_vars(1153, _368154, [], _369094)
^  Unify: (260) [user] subst_vars(1153, _368154, [], _369094)
   Call: (261) [system] compound(1153)
^  Redo: (260) [user] subst_vars(1153, _368154, [], _369094)
^  Unify: (260) [user] subst_vars(1153, 1153, [], [])
^  Exit: (260) [user] subst_vars(1153, 1153, [], [])
^  Call: (260) [user] subst_vars([0], _368156, [], _337346)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _368156, [], _337346)
^  Unify: (260) [user] subst_vars([0], [_384026|_384028], [], _337346)
^  Call: (261) [user] subst_vars(0, _384026, [], _384966)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _384026, [], _384966)
^  Unify: (261) [user] subst_vars(0, _384026, [], _384966)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _384026, [], _384966)
^  Unify: (261) [user] subst_vars(0, _384026, [], _384966)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _384026, [], _384966)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _384028, [], _337346)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _384028, [], _337346)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1153, 0], [1153, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     \";", 1153, 0], [";;     \";", 1153, 0], [], [])
   Call: (258) [system] compound_name_arguments(_337344, '$COMMENT', [";;     \";", 1153, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     \";", 1153, 0), '$COMMENT', [";;     \";", 1153, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     \";", 1153, 0), '$COMMENT'(";;     \";", 1153, 0), [], [])
   Call: (257) [system] _407384=metta_file_buffer(+, '$COMMENT'(";;     \";", 1153, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     \";", 1153, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     \";", 1153, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     \";", 1153, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     \";", 1153, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \";", 1153, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \";", 1153, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \";", 1153, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \";", 1153, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1154, 0, 42172, '$COMMENT'(";;", 1154, 0), '$stream_position'(42172, 1154, 0, 42172)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1154, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1154, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1154, 0), _460100))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1154, 0), _460100))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1154, 0), _460100)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1154, 0), _460100)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1154, 0), _460100)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1154, 0), _460100)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1154, 0), _465712))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1154, 0), _465712))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1154, 0), _465712))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1154, 0), _465712))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1154, 0), _465712)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1154, 0), _465712)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1154, 0), _471298))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1154, 0), _471298))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1154, 0), _471298)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1154, 0), _471298)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1154, 0), _471298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1154, 0), _471298)
   Call: (270) [system] var('$COMMENT'(";;", 1154, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1154, 0), _471298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1154, 0), '$VAR'(_478758))
   Call: (270) [system] atom('$COMMENT'(";;", 1154, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1154, 0), _471298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1154, 0), _471298)
   Call: (270) [system] '$COMMENT'(";;", 1154, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1154, 0), _471298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1154, 0), _471298)
   Call: (270) [system] '$COMMENT'(";;", 1154, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1154, 0), _471298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1154, 0), _471298)
   Call: (270) [system] '$COMMENT'(";;", 1154, 0)==[_488038, _488044]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1154, 0), _471298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1154, 0), _471298)
   Call: (270) [system] is_list('$COMMENT'(";;", 1154, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1154, 0), _471298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1154, 0), _471298)
   Call: (270) [system] string('$COMMENT'(";;", 1154, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1154, 0), _471298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1154, 0), _471298)
   Call: (270) [system] compound('$COMMENT'(";;", 1154, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1154, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1154, 0), _498240, _498242)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1154, 0), '$COMMENT', [";;", 1154, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1154, 0], _501982)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1154, 0], _501982)
   Call: (271) [apply] apply:maplist_([";;", 1154, 0], _501982, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1154, 0], [_504800|_504802], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _504800)
^  Unify: (272) [user] mfix_vars1(";;", _504800)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _504800)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_509446))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _504800)
^  Unify: (272) [user] mfix_vars1(";;", _504800)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _504800)
^  Unify: (272) [user] mfix_vars1(";;", _504800)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _504800)
^  Unify: (272) [user] mfix_vars1(";;", _504800)
   Call: (273) [system] ";;"==[_518726, _518732]
^  Redo: (272) [user] mfix_vars1(";;", _504800)
^  Unify: (272) [user] mfix_vars1(";;", _504800)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _504800)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] ";;"=_6022
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1154, 0], _6024, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1154, 0], [_24878|_24880], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1154, _24878)
^  Unify: (273) [user] mfix_vars1(1154, _24878)
   Call: (274) [system] var(1154)
^  Redo: (273) [user] mfix_vars1(1154, _24878)
^  Unify: (273) [user] mfix_vars1(1154, '$VAR'(_29524))
   Call: (274) [system] atom(1154)
^  Redo: (273) [user] mfix_vars1(1154, _24878)
^  Unify: (273) [user] mfix_vars1(1154, _24878)
   Call: (274) [system] 1154==true
^  Redo: (273) [user] mfix_vars1(1154, _24878)
^  Unify: (273) [user] mfix_vars1(1154, _24878)
   Call: (274) [system] 1154==false
^  Redo: (273) [user] mfix_vars1(1154, _24878)
^  Unify: (273) [user] mfix_vars1(1154, _24878)
   Call: (274) [system] 1154==[_38804, _38810]
^  Redo: (273) [user] mfix_vars1(1154, _24878)
^  Unify: (273) [user] mfix_vars1(1154, _24878)
   Call: (274) [system] is_list(1154)
^  Redo: (273) [user] mfix_vars1(1154, _24878)
^  Unify: (273) [user] mfix_vars1(1154, _24878)
   Call: (274) [system] string(1154)
^  Redo: (273) [user] mfix_vars1(1154, _24878)
^  Unify: (273) [user] mfix_vars1(1154, _24878)
   Call: (274) [system] compound(1154)
^  Redo: (273) [user] mfix_vars1(1154, _24878)
^  Unify: (273) [user] mfix_vars1(1154, _24878)
^  Call: (274) [user] symbol(1154)
^  Unify: (274) [user] symbol(1154)
   Call: (275) [system] atom(1154)
   Fail: (275) [system] atom(1154)
^  Fail: (274) [user] symbol(1154)
^  Redo: (273) [user] mfix_vars1(1154, _24878)
   Call: (274) [system] 1154=_24878
   Exit: (274) [system] 1154=1154
^  Exit: (273) [user] mfix_vars1(1154, 1154)
   Call: (273) [apply] apply:maplist_([0], _24880, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_59204|_59206], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _59204)
^  Unify: (274) [user] mfix_vars1(0, _59204)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _59204)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_63850))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _59204)
^  Unify: (274) [user] mfix_vars1(0, _59204)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _59204)
^  Unify: (274) [user] mfix_vars1(0, _59204)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _59204)
^  Unify: (274) [user] mfix_vars1(0, _59204)
   Call: (275) [system] 0==[_73130, _73136]
^  Redo: (274) [user] mfix_vars1(0, _59204)
^  Unify: (274) [user] mfix_vars1(0, _59204)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _59204)
^  Unify: (274) [user] mfix_vars1(0, _59204)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _59204)
^  Unify: (274) [user] mfix_vars1(0, _59204)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _59204)
^  Unify: (274) [user] mfix_vars1(0, _59204)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _59204)
   Call: (275) [system] 0=_59204
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _59206, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1154, 0], [1154, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1154, 0], [";;", 1154, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1154, 0], [";;", 1154, 0])
   Call: (270) [system] compound_name_arguments(_5976, '$COMMENT', [";;", 1154, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1154, 0), '$COMMENT', [";;", 1154, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1154, 0)\=@='$COMMENT'(";;", 1154, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1154, 0), _5962)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1154, 0), _109378))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1154, 0), _109378))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1154, 0), _109378))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1154, 0), _109378))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1154, 0), _109378)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1154, 0), _109378)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1154, 0), _114964))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1154, 0), _114964))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1154, 0), _114964)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1154, 0), _114964)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1154, 0), _114964)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1154, 0)\=@='$COMMENT'(";;", 1154, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1154, 0), _109378)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1154, 0), _5942))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1154, 0), _5942))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1154, 0), _5942))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1154, 0), _5942))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1154, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1154, 0), _5942)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1154, 0), _137284))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1154, 0), _137284))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1154, 0), _137284)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1154, 0), _137284)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1154, 0), _137284)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1154, 0)\=@='$COMMENT'(";;", 1154, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1154, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1154, 0)\=@='$COMMENT'(";;", 1154, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1154, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1154, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1154, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1154, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1154, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1154, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1154, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1154, 0), _166062, [], _166064)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1154, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1154, 0), _166062, [], _166064)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1154, 0), _166062, [], _166064)
   Call: (258) [system] atom('$COMMENT'(";;", 1154, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1154, 0), _166062, [], _166064)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1154, 0), _166062, [], _166064)
   Call: (258) [system] compound('$COMMENT'(";;", 1154, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1154, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1154, 0), _175378, _175380)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1154, 0), '$COMMENT', [";;", 1154, 0])
^  Call: (258) [user] subst_vars([";;", 1154, 0], _177264, [], _166064)
^  Unify: (258) [user] subst_vars([";;", 1154, 0], [";;", 1154, 0], [], [])
   Call: (259) [system] var([";;", 1154, 0])
^  Redo: (258) [user] subst_vars([";;", 1154, 0], _177264, [], _166064)
^  Unify: (258) [user] subst_vars([";;", 1154, 0], [_181000|_181002], [], _166064)
^  Call: (259) [user] subst_vars(";;", _181000, [], _181940)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _181000, [], _181940)
^  Unify: (259) [user] subst_vars(";;", _181000, [], _181940)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _181000, [], _181940)
^  Unify: (259) [user] subst_vars(";;", _181000, [], _181940)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _181000, [], _181940)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1154, 0], _181002, [], _166064)
^  Unify: (259) [user] subst_vars([1154, 0], [1154, 0], [], [])
   Call: (260) [system] var([1154, 0])
^  Redo: (259) [user] subst_vars([1154, 0], _181002, [], _166064)
^  Unify: (259) [user] subst_vars([1154, 0], [_196872|_196874], [], _166064)
^  Call: (260) [user] subst_vars(1154, _196872, [], _197812)
^  Unify: (260) [user] subst_vars(1154, 1154, [], [])
   Call: (261) [system] var(1154)
^  Redo: (260) [user] subst_vars(1154, _196872, [], _197812)
^  Unify: (260) [user] subst_vars(1154, _196872, [], _197812)
   Call: (261) [system] atom(1154)
^  Redo: (260) [user] subst_vars(1154, _196872, [], _197812)
^  Unify: (260) [user] subst_vars(1154, _196872, [], _197812)
   Call: (261) [system] compound(1154)
^  Redo: (260) [user] subst_vars(1154, _196872, [], _197812)
^  Unify: (260) [user] subst_vars(1154, 1154, [], [])
^  Exit: (260) [user] subst_vars(1154, 1154, [], [])
^  Call: (260) [user] subst_vars([0], _196874, [], _166064)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _196874, [], _166064)
^  Unify: (260) [user] subst_vars([0], [_212744|_212746], [], _166064)
^  Call: (261) [user] subst_vars(0, _212744, [], _213684)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _212744, [], _213684)
^  Unify: (261) [user] subst_vars(0, _212744, [], _213684)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _212744, [], _213684)
^  Unify: (261) [user] subst_vars(0, _212744, [], _213684)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _212744, [], _213684)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _212746, [], _166064)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _212746, [], _166064)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1154, 0], [1154, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1154, 0], [";;", 1154, 0], [], [])
   Call: (258) [system] compound_name_arguments(_166062, '$COMMENT', [";;", 1154, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1154, 0), '$COMMENT', [";;", 1154, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1154, 0), '$COMMENT'(";;", 1154, 0), [], [])
   Call: (257) [system] _236102=metta_file_buffer(+, '$COMMENT'(";;", 1154, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1154, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1154, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1154, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1154, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1154, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1154, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1154, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1154, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1155, 0, 42175, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$stream_position'(42175, 1155, 0, 42175)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _288832))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _288832))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _288832)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _288832)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _288832)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _288832)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _294444))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _294444))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _294444))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _294444))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _294444)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _294444)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _300030))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _300030))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _300030)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _300030)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _300030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _300030)
   Call: (270) [system] var('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _300030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$VAR'(_307490))
   Call: (270) [system] atom('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _300030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _300030)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _300030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _300030)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _300030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _300030)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0)==[_316770, _316776]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _300030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _300030)
   Call: (270) [system] is_list('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _300030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _300030)
   Call: (270) [system] string('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _300030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _300030)
   Call: (270) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _326972, _326974)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0], _330714)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0], _330714)
   Call: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0], _330714, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0], [_333532|_333534], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _333532)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _333532)
   Call: (273) [system] var(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _333532)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", '$VAR'(_338178))
   Call: (273) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _333532)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _333532)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==true
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _333532)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _333532)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==false
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _333532)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _333532)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==[_347458, _347464]
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _333532)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _333532)
   Call: (273) [system] is_list(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _333532)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _333532)
   Call: (273) [system] string(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Exit: (273) [system] string(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _333532)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _333532)
   Call: (273) [system] compound(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _333532)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _333532)
^  Call: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Unify: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (274) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Fail: (274) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Fail: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _333532)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"=_333532
   Exit: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"=";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"
^  Exit: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (272) [apply] apply:maplist_([1155, 0], _333534, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1155, 0], [_371530|_371532], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1155, _371530)
^  Unify: (273) [user] mfix_vars1(1155, _371530)
   Call: (274) [system] var(1155)
^  Redo: (273) [user] mfix_vars1(1155, _371530)
^  Unify: (273) [user] mfix_vars1(1155, '$VAR'(_376176))
   Call: (274) [system] atom(1155)
^  Redo: (273) [user] mfix_vars1(1155, _371530)
^  Unify: (273) [user] mfix_vars1(1155, _371530)
   Call: (274) [system] 1155==true
^  Redo: (273) [user] mfix_vars1(1155, _371530)
^  Unify: (273) [user] mfix_vars1(1155, _371530)
   Call: (274) [system] 1155==false
^  Redo: (273) [user] mfix_vars1(1155, _371530)
^  Unify: (273) [user] mfix_vars1(1155, _371530)
   Call: (274) [system] 1155==[_385456, _385462]
^  Redo: (273) [user] mfix_vars1(1155, _371530)
^  Unify: (273) [user] mfix_vars1(1155, _371530)
   Call: (274) [system] is_list(1155)
^  Redo: (273) [user] mfix_vars1(1155, _371530)
^  Unify: (273) [user] mfix_vars1(1155, _371530)
   Call: (274) [system] string(1155)
^  Redo: (273) [user] mfix_vars1(1155, _371530)
^  Unify: (273) [user] mfix_vars1(1155, _371530)
   Call: (274) [system] compound(1155)
^  Redo: (273) [user] mfix_vars1(1155, _371530)
^  Unify: (273) [user] mfix_vars1(1155, _371530)
^  Call: (274) [user] symbol(1155)
^  Unify: (274) [user] symbol(1155)
   Call: (275) [system] atom(1155)
   Fail: (275) [system] atom(1155)
^  Fail: (274) [user] symbol(1155)
^  Redo: (273) [user] mfix_vars1(1155, _371530)
   Call: (274) [system] 1155=_371530
   Exit: (274) [system] 1155=1155
^  Exit: (273) [user] mfix_vars1(1155, 1155)
   Call: (273) [apply] apply:maplist_([0], _371532, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_405856|_405858], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _405856)
^  Unify: (274) [user] mfix_vars1(0, _405856)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _405856)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_410502))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _405856)
^  Unify: (274) [user] mfix_vars1(0, _405856)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _405856)
^  Unify: (274) [user] mfix_vars1(0, _405856)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _405856)
^  Unify: (274) [user] mfix_vars1(0, _405856)
   Call: (275) [system] 0==[_419782, _419788]
^  Redo: (274) [user] mfix_vars1(0, _405856)
^  Unify: (274) [user] mfix_vars1(0, _405856)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _405856)
^  Unify: (274) [user] mfix_vars1(0, _405856)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _405856)
^  Unify: (274) [user] mfix_vars1(0, _405856)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _405856)
^  Unify: (274) [user] mfix_vars1(0, _405856)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _405856)
   Call: (275) [system] 0=_405856
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _405858, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1155, 0], [1155, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0])
   Call: (270) [system] compound_name_arguments(_300030, '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _294444)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _456030))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _456030))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _456030))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _456030))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _456030)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _456030)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _461616))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _461616))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _461616)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _461616)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _461616)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _456030)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _288832))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _288832))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _288832))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _288832))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _288832)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _288832)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _483936))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _483936))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _483936)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _483936)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _483936)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _288832)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0)))
   Call: (261) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _512714, [], _512716)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _512714, [], _512716)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _512714, [], _512716)
   Call: (258) [system] atom('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _512714, [], _512716)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _512714, [], _512716)
   Call: (258) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), _522030, _522032)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0])
^  Call: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0], _5978, [], _5952)
^  Unify: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0], [], [])
   Call: (259) [system] var([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0])
^  Redo: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0], _5978, [], _5952)
^  Unify: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0], [_9650|_9652], [], _5952)
^  Call: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _9650, [], _10590)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
   Call: (260) [system] var(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _9650, [], _10590)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _9650, [], _10590)
   Call: (260) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _9650, [], _10590)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _9650, [], _10590)
   Call: (260) [system] compound(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _9650, [], _10590)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Exit: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Call: (259) [user] subst_vars([1155, 0], _9652, [], _5952)
^  Unify: (259) [user] subst_vars([1155, 0], [1155, 0], [], [])
   Call: (260) [system] var([1155, 0])
^  Redo: (259) [user] subst_vars([1155, 0], _9652, [], _5952)
^  Unify: (259) [user] subst_vars([1155, 0], [_25522|_25524], [], _5952)
^  Call: (260) [user] subst_vars(1155, _25522, [], _26462)
^  Unify: (260) [user] subst_vars(1155, 1155, [], [])
   Call: (261) [system] var(1155)
^  Redo: (260) [user] subst_vars(1155, _25522, [], _26462)
^  Unify: (260) [user] subst_vars(1155, _25522, [], _26462)
   Call: (261) [system] atom(1155)
^  Redo: (260) [user] subst_vars(1155, _25522, [], _26462)
^  Unify: (260) [user] subst_vars(1155, _25522, [], _26462)
   Call: (261) [system] compound(1155)
^  Redo: (260) [user] subst_vars(1155, _25522, [], _26462)
^  Unify: (260) [user] subst_vars(1155, 1155, [], [])
^  Exit: (260) [user] subst_vars(1155, 1155, [], [])
^  Call: (260) [user] subst_vars([0], _25524, [], _5952)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _25524, [], _5952)
^  Unify: (260) [user] subst_vars([0], [_41394|_41396], [], _5952)
^  Call: (261) [user] subst_vars(0, _41394, [], _42334)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _41394, [], _42334)
^  Unify: (261) [user] subst_vars(0, _41394, [], _42334)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _41394, [], _42334)
^  Unify: (261) [user] subst_vars(0, _41394, [], _42334)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _41394, [], _42334)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _41396, [], _5952)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _41396, [], _5952)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1155, 0], [1155, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5950, '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), [], [])
   Call: (257) [system] _64752=metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1155, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1156, 0, 42236, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$stream_position'(42236, 1156, 0, 42236)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _117488))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _117488))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _117488)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _117488)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _117488)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _117488)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _123100))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _123100))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _123100))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _123100))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _123100)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _123100)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _128686))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _128686))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _128686)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _128686)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _128686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _128686)
   Call: (270) [system] var('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _128686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$VAR'(_136146))
   Call: (270) [system] atom('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _128686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _128686)
   Call: (270) [system] '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _128686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _128686)
   Call: (270) [system] '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _128686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _128686)
   Call: (270) [system] '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0)==[_145426, _145432]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _128686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _128686)
   Call: (270) [system] is_list('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _128686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _128686)
   Call: (270) [system] string('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _128686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _128686)
   Call: (270) [system] compound('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _155628, _155630)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT', [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0], _159370)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0], _159370)
   Call: (271) [apply] apply:maplist_([";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0], _159370, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0], [_162188|_162190], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _162188)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _162188)
   Call: (273) [system] var(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _162188)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", '$VAR'(_166834))
   Call: (273) [system] atom(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _162188)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _162188)
   Call: (273) [system] ";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),"==true
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _162188)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _162188)
   Call: (273) [system] ";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),"==false
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _162188)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _162188)
   Call: (273) [system] ";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),"==[_176114, _176120]
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _162188)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _162188)
   Call: (273) [system] is_list(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _162188)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _162188)
   Call: (273) [system] string(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
   Exit: (273) [system] string(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _162188)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _162188)
   Call: (273) [system] compound(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _162188)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _162188)
^  Call: (273) [user] symbol(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
^  Unify: (273) [user] symbol(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
   Call: (274) [system] atom(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
   Fail: (274) [system] atom(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
^  Fail: (273) [user] symbol(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _162188)
   Call: (273) [system] ";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),"=_162188
   Exit: (273) [system] ";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),"=";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),"
^  Exit: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", ";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
   Call: (272) [apply] apply:maplist_([1156, 0], _162190, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1156, 0], [_200186|_200188], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1156, _200186)
^  Unify: (273) [user] mfix_vars1(1156, _200186)
   Call: (274) [system] var(1156)
^  Redo: (273) [user] mfix_vars1(1156, _200186)
^  Unify: (273) [user] mfix_vars1(1156, '$VAR'(_204832))
   Call: (274) [system] atom(1156)
^  Redo: (273) [user] mfix_vars1(1156, _200186)
^  Unify: (273) [user] mfix_vars1(1156, _200186)
   Call: (274) [system] 1156==true
^  Redo: (273) [user] mfix_vars1(1156, _200186)
^  Unify: (273) [user] mfix_vars1(1156, _200186)
   Call: (274) [system] 1156==false
^  Redo: (273) [user] mfix_vars1(1156, _200186)
^  Unify: (273) [user] mfix_vars1(1156, _200186)
   Call: (274) [system] 1156==[_214112, _214118]
^  Redo: (273) [user] mfix_vars1(1156, _200186)
^  Unify: (273) [user] mfix_vars1(1156, _200186)
   Call: (274) [system] is_list(1156)
^  Redo: (273) [user] mfix_vars1(1156, _200186)
^  Unify: (273) [user] mfix_vars1(1156, _200186)
   Call: (274) [system] string(1156)
^  Redo: (273) [user] mfix_vars1(1156, _200186)
^  Unify: (273) [user] mfix_vars1(1156, _200186)
   Call: (274) [system] compound(1156)
^  Redo: (273) [user] mfix_vars1(1156, _200186)
^  Unify: (273) [user] mfix_vars1(1156, _200186)
^  Call: (274) [user] symbol(1156)
^  Unify: (274) [user] symbol(1156)
   Call: (275) [system] atom(1156)
   Fail: (275) [system] atom(1156)
^  Fail: (274) [user] symbol(1156)
^  Redo: (273) [user] mfix_vars1(1156, _200186)
   Call: (274) [system] 1156=_200186
   Exit: (274) [system] 1156=1156
^  Exit: (273) [user] mfix_vars1(1156, 1156)
   Call: (273) [apply] apply:maplist_([0], _200188, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_234512|_234514], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _234512)
^  Unify: (274) [user] mfix_vars1(0, _234512)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _234512)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_239158))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _234512)
^  Unify: (274) [user] mfix_vars1(0, _234512)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _234512)
^  Unify: (274) [user] mfix_vars1(0, _234512)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _234512)
^  Unify: (274) [user] mfix_vars1(0, _234512)
   Call: (275) [system] 0==[_248438, _248444]
^  Redo: (274) [user] mfix_vars1(0, _234512)
^  Unify: (274) [user] mfix_vars1(0, _234512)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _234512)
^  Unify: (274) [user] mfix_vars1(0, _234512)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _234512)
^  Unify: (274) [user] mfix_vars1(0, _234512)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _234512)
^  Unify: (274) [user] mfix_vars1(0, _234512)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _234512)
   Call: (275) [system] 0=_234512
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _234514, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1156, 0], [1156, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0], [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0], [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0])
   Call: (270) [system] compound_name_arguments(_128686, '$COMMENT', [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT', [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0)))
   Call: (267) [system] '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0)\=@='$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _123100)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _284686))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _284686))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _284686))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _284686))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _284686)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _284686)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _290272))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _290272))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _290272)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _290272)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _290272)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0)))
   Call: (267) [system] '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0)\=@='$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _284686)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _117488))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _117488))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _117488))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _117488))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _117488)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _117488)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _312592))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _312592))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _312592)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _312592)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _312592)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0)))
   Call: (267) [system] '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0)\=@='$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _117488)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0)))
   Call: (261) [system] '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0)\=@='$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _341370, [], _341372)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _341370, [], _341372)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _341370, [], _341372)
   Call: (258) [system] atom('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _341370, [], _341372)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _341370, [], _341372)
   Call: (258) [system] compound('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), _350686, _350688)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT', [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0])
^  Call: (258) [user] subst_vars([";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0], _352572, [], _341372)
^  Unify: (258) [user] subst_vars([";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0], [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0], [], [])
   Call: (259) [system] var([";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0])
^  Redo: (258) [user] subst_vars([";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0], _352572, [], _341372)
^  Unify: (258) [user] subst_vars([";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0], [_356308|_356310], [], _341372)
^  Call: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _356308, [], _357248)
^  Unify: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", ";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", [], [])
   Call: (260) [system] var(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
^  Redo: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _356308, [], _357248)
^  Unify: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _356308, [], _357248)
   Call: (260) [system] atom(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
^  Redo: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _356308, [], _357248)
^  Unify: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _356308, [], _357248)
   Call: (260) [system] compound(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),")
^  Redo: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", _356308, [], _357248)
^  Unify: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", ";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", [], [])
^  Exit: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", ";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", [], [])
^  Call: (259) [user] subst_vars([1156, 0], _356310, [], _341372)
^  Unify: (259) [user] subst_vars([1156, 0], [1156, 0], [], [])
   Call: (260) [system] var([1156, 0])
^  Redo: (259) [user] subst_vars([1156, 0], _356310, [], _341372)
^  Unify: (259) [user] subst_vars([1156, 0], [_372180|_372182], [], _341372)
^  Call: (260) [user] subst_vars(1156, _372180, [], _373120)
^  Unify: (260) [user] subst_vars(1156, 1156, [], [])
   Call: (261) [system] var(1156)
^  Redo: (260) [user] subst_vars(1156, _372180, [], _373120)
^  Unify: (260) [user] subst_vars(1156, _372180, [], _373120)
   Call: (261) [system] atom(1156)
^  Redo: (260) [user] subst_vars(1156, _372180, [], _373120)
^  Unify: (260) [user] subst_vars(1156, _372180, [], _373120)
   Call: (261) [system] compound(1156)
^  Redo: (260) [user] subst_vars(1156, _372180, [], _373120)
^  Unify: (260) [user] subst_vars(1156, 1156, [], [])
^  Exit: (260) [user] subst_vars(1156, 1156, [], [])
^  Call: (260) [user] subst_vars([0], _372182, [], _341372)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _372182, [], _341372)
^  Unify: (260) [user] subst_vars([0], [_388052|_388054], [], _341372)
^  Call: (261) [user] subst_vars(0, _388052, [], _388992)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _388052, [], _388992)
^  Unify: (261) [user] subst_vars(0, _388052, [], _388992)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _388052, [], _388992)
^  Unify: (261) [user] subst_vars(0, _388052, [], _388992)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _388052, [], _388992)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _388054, [], _341372)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _388054, [], _341372)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1156, 0], [1156, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0], [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0], [], [])
   Call: (258) [system] compound_name_arguments(_341370, '$COMMENT', [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT', [";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), [], [])
   Call: (257) [system] _411410=metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut().register_token(Regex::new(\"id_num\").unwrap(),", 1156, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1157, 0, 42320, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$stream_position'(42320, 1157, 0, 42320)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _464134))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _464134))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _464134)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _464134)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _464134)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _464134)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _469746))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _469746))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _469746))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _469746))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _469746)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _469746)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _475332))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _475332))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _475332)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _475332)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _475332)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _475332)
   Call: (270) [system] var('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _475332)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$VAR'(_482792))
   Call: (270) [system] atom('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _475332)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _475332)
   Call: (270) [system] '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _475332)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _475332)
   Call: (270) [system] '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _475332)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _475332)
   Call: (270) [system] '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0)==[_492072, _492078]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _475332)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _475332)
   Call: (270) [system] is_list('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _475332)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _475332)
   Call: (270) [system] string('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _475332)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _475332)
   Call: (270) [system] compound('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _502274, _502276)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT', [";;         |_| Atom::gnd(ID_NUM));", 1157, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         |_| Atom::gnd(ID_NUM));", 1157, 0], _506016)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         |_| Atom::gnd(ID_NUM));", 1157, 0], _506016)
   Call: (271) [apply] apply:maplist_([";;         |_| Atom::gnd(ID_NUM));", 1157, 0], _506016, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         |_| Atom::gnd(ID_NUM));", 1157, 0], [_508834|_508836], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _508834)
^  Unify: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _508834)
   Call: (273) [system] var(";;         |_| Atom::gnd(ID_NUM));")
^  Redo: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _508834)
^  Unify: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", '$VAR'(_513480))
   Call: (273) [system] atom(";;         |_| Atom::gnd(ID_NUM));")
^  Redo: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _508834)
^  Unify: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _508834)
   Call: (273) [system] ";;         |_| Atom::gnd(ID_NUM));"==true
^  Redo: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _508834)
^  Unify: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _508834)
   Call: (273) [system] ";;         |_| Atom::gnd(ID_NUM));"==false
^  Redo: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _508834)
^  Unify: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _508834)
   Call: (273) [system] ";;         |_| Atom::gnd(ID_NUM));"==[_522760, _522766]
^  Redo: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _6030)
^  Unify: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _6030)
   Call: (273) [system] is_list(";;         |_| Atom::gnd(ID_NUM));")
^  Redo: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _6030)
^  Unify: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _6030)
   Call: (273) [system] string(";;         |_| Atom::gnd(ID_NUM));")
   Exit: (273) [system] string(";;         |_| Atom::gnd(ID_NUM));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _6030)
^  Unify: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _6030)
   Call: (273) [system] compound(";;         |_| Atom::gnd(ID_NUM));")
^  Redo: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _6030)
^  Unify: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _6030)
^  Call: (273) [user] symbol(";;         |_| Atom::gnd(ID_NUM));")
^  Unify: (273) [user] symbol(";;         |_| Atom::gnd(ID_NUM));")
   Call: (274) [system] atom(";;         |_| Atom::gnd(ID_NUM));")
   Fail: (274) [system] atom(";;         |_| Atom::gnd(ID_NUM));")
^  Fail: (273) [user] symbol(";;         |_| Atom::gnd(ID_NUM));")
^  Redo: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", _6030)
   Call: (273) [system] ";;         |_| Atom::gnd(ID_NUM));"=_6030
   Exit: (273) [system] ";;         |_| Atom::gnd(ID_NUM));"=";;         |_| Atom::gnd(ID_NUM));"
^  Exit: (272) [user] mfix_vars1(";;         |_| Atom::gnd(ID_NUM));", ";;         |_| Atom::gnd(ID_NUM));")
   Call: (272) [apply] apply:maplist_([1157, 0], _6032, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1157, 0], [_28948|_28950], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1157, _28948)
^  Unify: (273) [user] mfix_vars1(1157, _28948)
   Call: (274) [system] var(1157)
^  Redo: (273) [user] mfix_vars1(1157, _28948)
^  Unify: (273) [user] mfix_vars1(1157, '$VAR'(_33594))
   Call: (274) [system] atom(1157)
^  Redo: (273) [user] mfix_vars1(1157, _28948)
^  Unify: (273) [user] mfix_vars1(1157, _28948)
   Call: (274) [system] 1157==true
^  Redo: (273) [user] mfix_vars1(1157, _28948)
^  Unify: (273) [user] mfix_vars1(1157, _28948)
   Call: (274) [system] 1157==false
^  Redo: (273) [user] mfix_vars1(1157, _28948)
^  Unify: (273) [user] mfix_vars1(1157, _28948)
   Call: (274) [system] 1157==[_42874, _42880]
^  Redo: (273) [user] mfix_vars1(1157, _28948)
^  Unify: (273) [user] mfix_vars1(1157, _28948)
   Call: (274) [system] is_list(1157)
^  Redo: (273) [user] mfix_vars1(1157, _28948)
^  Unify: (273) [user] mfix_vars1(1157, _28948)
   Call: (274) [system] string(1157)
^  Redo: (273) [user] mfix_vars1(1157, _28948)
^  Unify: (273) [user] mfix_vars1(1157, _28948)
   Call: (274) [system] compound(1157)
^  Redo: (273) [user] mfix_vars1(1157, _28948)
^  Unify: (273) [user] mfix_vars1(1157, _28948)
^  Call: (274) [user] symbol(1157)
^  Unify: (274) [user] symbol(1157)
   Call: (275) [system] atom(1157)
   Fail: (275) [system] atom(1157)
^  Fail: (274) [user] symbol(1157)
^  Redo: (273) [user] mfix_vars1(1157, _28948)
   Call: (274) [system] 1157=_28948
   Exit: (274) [system] 1157=1157
^  Exit: (273) [user] mfix_vars1(1157, 1157)
   Call: (273) [apply] apply:maplist_([0], _28950, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_63274|_63276], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _63274)
^  Unify: (274) [user] mfix_vars1(0, _63274)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _63274)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_67920))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _63274)
^  Unify: (274) [user] mfix_vars1(0, _63274)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _63274)
^  Unify: (274) [user] mfix_vars1(0, _63274)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _63274)
^  Unify: (274) [user] mfix_vars1(0, _63274)
   Call: (275) [system] 0==[_77200, _77206]
^  Redo: (274) [user] mfix_vars1(0, _63274)
^  Unify: (274) [user] mfix_vars1(0, _63274)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _63274)
^  Unify: (274) [user] mfix_vars1(0, _63274)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _63274)
^  Unify: (274) [user] mfix_vars1(0, _63274)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _63274)
^  Unify: (274) [user] mfix_vars1(0, _63274)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _63274)
   Call: (275) [system] 0=_63274
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _63276, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1157, 0], [1157, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         |_| Atom::gnd(ID_NUM));", 1157, 0], [";;         |_| Atom::gnd(ID_NUM));", 1157, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         |_| Atom::gnd(ID_NUM));", 1157, 0], [";;         |_| Atom::gnd(ID_NUM));", 1157, 0])
   Call: (270) [system] compound_name_arguments(_5984, '$COMMENT', [";;         |_| Atom::gnd(ID_NUM));", 1157, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT', [";;         |_| Atom::gnd(ID_NUM));", 1157, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0)))
   Call: (267) [system] '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0)\=@='$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _5970)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _113448))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _113448))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _113448))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _113448))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _113448)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _113448)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _119034))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _119034))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _119034)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _119034)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _119034)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0)))
   Call: (267) [system] '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0)\=@='$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _113448)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _141354))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _141354))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _141354)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _141354)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _141354)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0)))
   Call: (267) [system] '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0)\=@='$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0)))
   Call: (261) [system] '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0)\=@='$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _170132, [], _170134)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _170132, [], _170134)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _170132, [], _170134)
   Call: (258) [system] atom('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _170132, [], _170134)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _170132, [], _170134)
   Call: (258) [system] compound('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), _179448, _179450)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT', [";;         |_| Atom::gnd(ID_NUM));", 1157, 0])
^  Call: (258) [user] subst_vars([";;         |_| Atom::gnd(ID_NUM));", 1157, 0], _181334, [], _170134)
^  Unify: (258) [user] subst_vars([";;         |_| Atom::gnd(ID_NUM));", 1157, 0], [";;         |_| Atom::gnd(ID_NUM));", 1157, 0], [], [])
   Call: (259) [system] var([";;         |_| Atom::gnd(ID_NUM));", 1157, 0])
^  Redo: (258) [user] subst_vars([";;         |_| Atom::gnd(ID_NUM));", 1157, 0], _181334, [], _170134)
^  Unify: (258) [user] subst_vars([";;         |_| Atom::gnd(ID_NUM));", 1157, 0], [_185070|_185072], [], _170134)
^  Call: (259) [user] subst_vars(";;         |_| Atom::gnd(ID_NUM));", _185070, [], _186010)
^  Unify: (259) [user] subst_vars(";;         |_| Atom::gnd(ID_NUM));", ";;         |_| Atom::gnd(ID_NUM));", [], [])
   Call: (260) [system] var(";;         |_| Atom::gnd(ID_NUM));")
^  Redo: (259) [user] subst_vars(";;         |_| Atom::gnd(ID_NUM));", _185070, [], _186010)
^  Unify: (259) [user] subst_vars(";;         |_| Atom::gnd(ID_NUM));", _185070, [], _186010)
   Call: (260) [system] atom(";;         |_| Atom::gnd(ID_NUM));")
^  Redo: (259) [user] subst_vars(";;         |_| Atom::gnd(ID_NUM));", _185070, [], _186010)
^  Unify: (259) [user] subst_vars(";;         |_| Atom::gnd(ID_NUM));", _185070, [], _186010)
   Call: (260) [system] compound(";;         |_| Atom::gnd(ID_NUM));")
^  Redo: (259) [user] subst_vars(";;         |_| Atom::gnd(ID_NUM));", _185070, [], _186010)
^  Unify: (259) [user] subst_vars(";;         |_| Atom::gnd(ID_NUM));", ";;         |_| Atom::gnd(ID_NUM));", [], [])
^  Exit: (259) [user] subst_vars(";;         |_| Atom::gnd(ID_NUM));", ";;         |_| Atom::gnd(ID_NUM));", [], [])
^  Call: (259) [user] subst_vars([1157, 0], _185072, [], _170134)
^  Unify: (259) [user] subst_vars([1157, 0], [1157, 0], [], [])
   Call: (260) [system] var([1157, 0])
^  Redo: (259) [user] subst_vars([1157, 0], _185072, [], _170134)
^  Unify: (259) [user] subst_vars([1157, 0], [_200942|_200944], [], _170134)
^  Call: (260) [user] subst_vars(1157, _200942, [], _201882)
^  Unify: (260) [user] subst_vars(1157, 1157, [], [])
   Call: (261) [system] var(1157)
^  Redo: (260) [user] subst_vars(1157, _200942, [], _201882)
^  Unify: (260) [user] subst_vars(1157, _200942, [], _201882)
   Call: (261) [system] atom(1157)
^  Redo: (260) [user] subst_vars(1157, _200942, [], _201882)
^  Unify: (260) [user] subst_vars(1157, _200942, [], _201882)
   Call: (261) [system] compound(1157)
^  Redo: (260) [user] subst_vars(1157, _200942, [], _201882)
^  Unify: (260) [user] subst_vars(1157, 1157, [], [])
^  Exit: (260) [user] subst_vars(1157, 1157, [], [])
^  Call: (260) [user] subst_vars([0], _200944, [], _170134)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _200944, [], _170134)
^  Unify: (260) [user] subst_vars([0], [_216814|_216816], [], _170134)
^  Call: (261) [user] subst_vars(0, _216814, [], _217754)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _216814, [], _217754)
^  Unify: (261) [user] subst_vars(0, _216814, [], _217754)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _216814, [], _217754)
^  Unify: (261) [user] subst_vars(0, _216814, [], _217754)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _216814, [], _217754)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _216816, [], _170134)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _216816, [], _170134)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1157, 0], [1157, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         |_| Atom::gnd(ID_NUM));", 1157, 0], [";;         |_| Atom::gnd(ID_NUM));", 1157, 0], [], [])
   Call: (258) [system] compound_name_arguments(_170132, '$COMMENT', [";;         |_| Atom::gnd(ID_NUM));", 1157, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT', [";;         |_| Atom::gnd(ID_NUM));", 1157, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), [], [])
   Call: (257) [system] _240172=metta_file_buffer(+, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         |_| Atom::gnd(ID_NUM));", 1157, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1158, 0, 42355, '$COMMENT'(";;", 1158, 0), '$stream_position'(42355, 1158, 0, 42355)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1158, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1158, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1158, 0), _292888))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1158, 0), _292888))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1158, 0), _292888)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1158, 0), _292888)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1158, 0), _292888)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1158, 0), _292888)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1158, 0), _298500))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1158, 0), _298500))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1158, 0), _298500))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1158, 0), _298500))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1158, 0), _298500)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1158, 0), _298500)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1158, 0), _304086))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1158, 0), _304086))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1158, 0), _304086)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1158, 0), _304086)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1158, 0), _304086)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1158, 0), _304086)
   Call: (270) [system] var('$COMMENT'(";;", 1158, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1158, 0), _304086)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1158, 0), '$VAR'(_311546))
   Call: (270) [system] atom('$COMMENT'(";;", 1158, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1158, 0), _304086)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1158, 0), _304086)
   Call: (270) [system] '$COMMENT'(";;", 1158, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1158, 0), _304086)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1158, 0), _304086)
   Call: (270) [system] '$COMMENT'(";;", 1158, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1158, 0), _304086)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1158, 0), _304086)
   Call: (270) [system] '$COMMENT'(";;", 1158, 0)==[_320826, _320832]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1158, 0), _304086)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1158, 0), _304086)
   Call: (270) [system] is_list('$COMMENT'(";;", 1158, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1158, 0), _304086)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1158, 0), _304086)
   Call: (270) [system] string('$COMMENT'(";;", 1158, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1158, 0), _304086)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1158, 0), _304086)
   Call: (270) [system] compound('$COMMENT'(";;", 1158, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1158, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1158, 0), _331028, _331030)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1158, 0), '$COMMENT', [";;", 1158, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1158, 0], _334770)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1158, 0], _334770)
   Call: (271) [apply] apply:maplist_([";;", 1158, 0], _334770, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1158, 0], [_337588|_337590], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _337588)
^  Unify: (272) [user] mfix_vars1(";;", _337588)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _337588)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_342234))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _337588)
^  Unify: (272) [user] mfix_vars1(";;", _337588)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _337588)
^  Unify: (272) [user] mfix_vars1(";;", _337588)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _337588)
^  Unify: (272) [user] mfix_vars1(";;", _337588)
   Call: (273) [system] ";;"==[_351514, _351520]
^  Redo: (272) [user] mfix_vars1(";;", _337588)
^  Unify: (272) [user] mfix_vars1(";;", _337588)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _337588)
^  Unify: (272) [user] mfix_vars1(";;", _337588)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _337588)
^  Unify: (272) [user] mfix_vars1(";;", _337588)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _337588)
^  Unify: (272) [user] mfix_vars1(";;", _337588)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _337588)
   Call: (273) [system] ";;"=_337588
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1158, 0], _337590, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1158, 0], [_375586|_375588], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1158, _375586)
^  Unify: (273) [user] mfix_vars1(1158, _375586)
   Call: (274) [system] var(1158)
^  Redo: (273) [user] mfix_vars1(1158, _375586)
^  Unify: (273) [user] mfix_vars1(1158, '$VAR'(_380232))
   Call: (274) [system] atom(1158)
^  Redo: (273) [user] mfix_vars1(1158, _375586)
^  Unify: (273) [user] mfix_vars1(1158, _375586)
   Call: (274) [system] 1158==true
^  Redo: (273) [user] mfix_vars1(1158, _375586)
^  Unify: (273) [user] mfix_vars1(1158, _375586)
   Call: (274) [system] 1158==false
^  Redo: (273) [user] mfix_vars1(1158, _375586)
^  Unify: (273) [user] mfix_vars1(1158, _375586)
   Call: (274) [system] 1158==[_389512, _389518]
^  Redo: (273) [user] mfix_vars1(1158, _375586)
^  Unify: (273) [user] mfix_vars1(1158, _375586)
   Call: (274) [system] is_list(1158)
^  Redo: (273) [user] mfix_vars1(1158, _375586)
^  Unify: (273) [user] mfix_vars1(1158, _375586)
   Call: (274) [system] string(1158)
^  Redo: (273) [user] mfix_vars1(1158, _375586)
^  Unify: (273) [user] mfix_vars1(1158, _375586)
   Call: (274) [system] compound(1158)
^  Redo: (273) [user] mfix_vars1(1158, _375586)
^  Unify: (273) [user] mfix_vars1(1158, _375586)
^  Call: (274) [user] symbol(1158)
^  Unify: (274) [user] symbol(1158)
   Call: (275) [system] atom(1158)
   Fail: (275) [system] atom(1158)
^  Fail: (274) [user] symbol(1158)
^  Redo: (273) [user] mfix_vars1(1158, _375586)
   Call: (274) [system] 1158=_375586
   Exit: (274) [system] 1158=1158
^  Exit: (273) [user] mfix_vars1(1158, 1158)
   Call: (273) [apply] apply:maplist_([0], _375588, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_409912|_409914], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _409912)
^  Unify: (274) [user] mfix_vars1(0, _409912)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _409912)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_414558))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _409912)
^  Unify: (274) [user] mfix_vars1(0, _409912)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _409912)
^  Unify: (274) [user] mfix_vars1(0, _409912)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _409912)
^  Unify: (274) [user] mfix_vars1(0, _409912)
   Call: (275) [system] 0==[_423838, _423844]
^  Redo: (274) [user] mfix_vars1(0, _409912)
^  Unify: (274) [user] mfix_vars1(0, _409912)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _409912)
^  Unify: (274) [user] mfix_vars1(0, _409912)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _409912)
^  Unify: (274) [user] mfix_vars1(0, _409912)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _409912)
^  Unify: (274) [user] mfix_vars1(0, _409912)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _409912)
   Call: (275) [system] 0=_409912
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _409914, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1158, 0], [1158, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1158, 0], [";;", 1158, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1158, 0], [";;", 1158, 0])
   Call: (270) [system] compound_name_arguments(_304086, '$COMMENT', [";;", 1158, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1158, 0), '$COMMENT', [";;", 1158, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1158, 0)\=@='$COMMENT'(";;", 1158, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1158, 0), _298500)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1158, 0), _460086))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1158, 0), _460086))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1158, 0), _460086))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1158, 0), _460086))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1158, 0), _460086)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1158, 0), _460086)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1158, 0), _465672))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1158, 0), _465672))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1158, 0), _465672)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1158, 0), _465672)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1158, 0), _465672)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1158, 0)\=@='$COMMENT'(";;", 1158, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1158, 0), _460086)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1158, 0), _292888))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1158, 0), _292888))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1158, 0), _292888))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1158, 0), _292888))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1158, 0), _292888)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1158, 0), _292888)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1158, 0), _487992))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1158, 0), _487992))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1158, 0), _487992)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1158, 0), _487992)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1158, 0), _487992)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1158, 0)\=@='$COMMENT'(";;", 1158, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1158, 0), _292888)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1158, 0)\=@='$COMMENT'(";;", 1158, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1158, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1158, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1158, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1158, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1158, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1158, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1158, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1158, 0), _516770, [], _516772)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1158, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1158, 0), _516770, [], _516772)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1158, 0), _516770, [], _516772)
   Call: (258) [system] atom('$COMMENT'(";;", 1158, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1158, 0), _516770, [], _516772)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1158, 0), _5936, [], _5938)
   Call: (258) [system] compound('$COMMENT'(";;", 1158, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1158, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1158, 0), _8144, _8146)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1158, 0), '$COMMENT', [";;", 1158, 0])
^  Call: (258) [user] subst_vars([";;", 1158, 0], _10030, [], _5938)
^  Unify: (258) [user] subst_vars([";;", 1158, 0], [";;", 1158, 0], [], [])
   Call: (259) [system] var([";;", 1158, 0])
^  Redo: (258) [user] subst_vars([";;", 1158, 0], _10030, [], _5938)
^  Unify: (258) [user] subst_vars([";;", 1158, 0], [_13766|_13768], [], _5938)
^  Call: (259) [user] subst_vars(";;", _13766, [], _14706)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _13766, [], _14706)
^  Unify: (259) [user] subst_vars(";;", _13766, [], _14706)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _13766, [], _14706)
^  Unify: (259) [user] subst_vars(";;", _13766, [], _14706)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _13766, [], _14706)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1158, 0], _13768, [], _5938)
^  Unify: (259) [user] subst_vars([1158, 0], [1158, 0], [], [])
   Call: (260) [system] var([1158, 0])
^  Redo: (259) [user] subst_vars([1158, 0], _13768, [], _5938)
^  Unify: (259) [user] subst_vars([1158, 0], [_29638|_29640], [], _5938)
^  Call: (260) [user] subst_vars(1158, _29638, [], _30578)
^  Unify: (260) [user] subst_vars(1158, 1158, [], [])
   Call: (261) [system] var(1158)
^  Redo: (260) [user] subst_vars(1158, _29638, [], _30578)
^  Unify: (260) [user] subst_vars(1158, _29638, [], _30578)
   Call: (261) [system] atom(1158)
^  Redo: (260) [user] subst_vars(1158, _29638, [], _30578)
^  Unify: (260) [user] subst_vars(1158, _29638, [], _30578)
   Call: (261) [system] compound(1158)
^  Redo: (260) [user] subst_vars(1158, _29638, [], _30578)
^  Unify: (260) [user] subst_vars(1158, 1158, [], [])
^  Exit: (260) [user] subst_vars(1158, 1158, [], [])
^  Call: (260) [user] subst_vars([0], _29640, [], _5938)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _29640, [], _5938)
^  Unify: (260) [user] subst_vars([0], [_45510|_45512], [], _5938)
^  Call: (261) [user] subst_vars(0, _45510, [], _46450)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _45510, [], _46450)
^  Unify: (261) [user] subst_vars(0, _45510, [], _46450)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _45510, [], _46450)
^  Unify: (261) [user] subst_vars(0, _45510, [], _46450)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _45510, [], _46450)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _45512, [], _5938)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _45512, [], _5938)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1158, 0], [1158, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1158, 0], [";;", 1158, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5936, '$COMMENT', [";;", 1158, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1158, 0), '$COMMENT', [";;", 1158, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1158, 0), '$COMMENT'(";;", 1158, 0), [], [])
   Call: (257) [system] _68868=metta_file_buffer(+, '$COMMENT'(";;", 1158, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1158, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1158, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1158, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1158, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1158, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1158, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1158, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1158, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1159, 0, 42358, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$stream_position'(42358, 1159, 0, 42358)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _121598))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _121598))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _121598)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _121598)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _121598)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _121598)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _127210))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _127210))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _127210))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _127210))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _127210)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _127210)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _132796))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _132796))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _132796)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _132796)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _132796)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _132796)
   Call: (270) [system] var('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _132796)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$VAR'(_140256))
   Call: (270) [system] atom('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _132796)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _132796)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _132796)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _132796)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _132796)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _132796)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0)==[_149536, _149542]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _132796)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _132796)
   Call: (270) [system] is_list('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _132796)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _132796)
   Call: (270) [system] string('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _132796)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _132796)
   Call: (270) [system] compound('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _159738, _159740)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0], _163480)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0], _163480)
   Call: (271) [apply] apply:maplist_([";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0], _163480, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0], [_166298|_166300], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _166298)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _166298)
   Call: (273) [system] var(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _166298)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", '$VAR'(_170944))
   Call: (273) [system] atom(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _166298)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _166298)
   Call: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program1)),"==true
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _166298)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _166298)
   Call: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program1)),"==false
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _166298)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _166298)
   Call: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program1)),"==[_180224, _180230]
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _166298)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _166298)
   Call: (273) [system] is_list(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _166298)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _166298)
   Call: (273) [system] string(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
   Exit: (273) [system] string(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _166298)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _166298)
   Call: (273) [system] compound(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _166298)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _166298)
^  Call: (273) [user] symbol(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
^  Unify: (273) [user] symbol(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
   Call: (274) [system] atom(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
   Fail: (274) [system] atom(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
^  Fail: (273) [user] symbol(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _166298)
   Call: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program1)),"=_166298
   Exit: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program1)),"=";;     assert_eq!(metta.run(SExprParser::new(program1)),"
^  Exit: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program1)),", ";;     assert_eq!(metta.run(SExprParser::new(program1)),")
   Call: (272) [apply] apply:maplist_([1159, 0], _166300, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1159, 0], [_204296|_204298], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1159, _204296)
^  Unify: (273) [user] mfix_vars1(1159, _204296)
   Call: (274) [system] var(1159)
^  Redo: (273) [user] mfix_vars1(1159, _204296)
^  Unify: (273) [user] mfix_vars1(1159, '$VAR'(_208942))
   Call: (274) [system] atom(1159)
^  Redo: (273) [user] mfix_vars1(1159, _204296)
^  Unify: (273) [user] mfix_vars1(1159, _204296)
   Call: (274) [system] 1159==true
^  Redo: (273) [user] mfix_vars1(1159, _204296)
^  Unify: (273) [user] mfix_vars1(1159, _204296)
   Call: (274) [system] 1159==false
^  Redo: (273) [user] mfix_vars1(1159, _204296)
^  Unify: (273) [user] mfix_vars1(1159, _204296)
   Call: (274) [system] 1159==[_218222, _218228]
^  Redo: (273) [user] mfix_vars1(1159, _204296)
^  Unify: (273) [user] mfix_vars1(1159, _204296)
   Call: (274) [system] is_list(1159)
^  Redo: (273) [user] mfix_vars1(1159, _204296)
^  Unify: (273) [user] mfix_vars1(1159, _204296)
   Call: (274) [system] string(1159)
^  Redo: (273) [user] mfix_vars1(1159, _204296)
^  Unify: (273) [user] mfix_vars1(1159, _204296)
   Call: (274) [system] compound(1159)
^  Redo: (273) [user] mfix_vars1(1159, _204296)
^  Unify: (273) [user] mfix_vars1(1159, _204296)
^  Call: (274) [user] symbol(1159)
^  Unify: (274) [user] symbol(1159)
   Call: (275) [system] atom(1159)
   Fail: (275) [system] atom(1159)
^  Fail: (274) [user] symbol(1159)
^  Redo: (273) [user] mfix_vars1(1159, _204296)
   Call: (274) [system] 1159=_204296
   Exit: (274) [system] 1159=1159
^  Exit: (273) [user] mfix_vars1(1159, 1159)
   Call: (273) [apply] apply:maplist_([0], _204298, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_238622|_238624], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _238622)
^  Unify: (274) [user] mfix_vars1(0, _238622)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _238622)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_243268))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _238622)
^  Unify: (274) [user] mfix_vars1(0, _238622)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _238622)
^  Unify: (274) [user] mfix_vars1(0, _238622)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _238622)
^  Unify: (274) [user] mfix_vars1(0, _238622)
   Call: (275) [system] 0==[_252548, _252554]
^  Redo: (274) [user] mfix_vars1(0, _238622)
^  Unify: (274) [user] mfix_vars1(0, _238622)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _238622)
^  Unify: (274) [user] mfix_vars1(0, _238622)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _238622)
^  Unify: (274) [user] mfix_vars1(0, _238622)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _238622)
^  Unify: (274) [user] mfix_vars1(0, _238622)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _238622)
   Call: (275) [system] 0=_238622
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _238624, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1159, 0], [1159, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0], [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0], [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0])
   Call: (270) [system] compound_name_arguments(_132796, '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0)\=@='$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _127210)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _288796))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _288796))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _288796))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _288796))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _288796)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _288796)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _294382))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _294382))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _294382)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _294382)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _294382)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0)\=@='$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _288796)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _121598))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _121598))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _121598))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _121598))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _121598)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _121598)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _316702))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _316702))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _316702)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _316702)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _316702)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0)\=@='$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _121598)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0)))
   Call: (261) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0)\=@='$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _345480, [], _345482)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _345480, [], _345482)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _345480, [], _345482)
   Call: (258) [system] atom('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _345480, [], _345482)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _345480, [], _345482)
   Call: (258) [system] compound('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), _354796, _354798)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0])
^  Call: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0], _356682, [], _345482)
^  Unify: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0], [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0], [], [])
   Call: (259) [system] var([";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0])
^  Redo: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0], _356682, [], _345482)
^  Unify: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0], [_360418|_360420], [], _345482)
^  Call: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _360418, [], _361358)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program1)),", ";;     assert_eq!(metta.run(SExprParser::new(program1)),", [], [])
   Call: (260) [system] var(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _360418, [], _361358)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _360418, [], _361358)
   Call: (260) [system] atom(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _360418, [], _361358)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _360418, [], _361358)
   Call: (260) [system] compound(";;     assert_eq!(metta.run(SExprParser::new(program1)),")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program1)),", _360418, [], _361358)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program1)),", ";;     assert_eq!(metta.run(SExprParser::new(program1)),", [], [])
^  Exit: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program1)),", ";;     assert_eq!(metta.run(SExprParser::new(program1)),", [], [])
^  Call: (259) [user] subst_vars([1159, 0], _360420, [], _345482)
^  Unify: (259) [user] subst_vars([1159, 0], [1159, 0], [], [])
   Call: (260) [system] var([1159, 0])
^  Redo: (259) [user] subst_vars([1159, 0], _360420, [], _345482)
^  Unify: (259) [user] subst_vars([1159, 0], [_376290|_376292], [], _345482)
^  Call: (260) [user] subst_vars(1159, _376290, [], _377230)
^  Unify: (260) [user] subst_vars(1159, 1159, [], [])
   Call: (261) [system] var(1159)
^  Redo: (260) [user] subst_vars(1159, _376290, [], _377230)
^  Unify: (260) [user] subst_vars(1159, _376290, [], _377230)
   Call: (261) [system] atom(1159)
^  Redo: (260) [user] subst_vars(1159, _376290, [], _377230)
^  Unify: (260) [user] subst_vars(1159, _376290, [], _377230)
   Call: (261) [system] compound(1159)
^  Redo: (260) [user] subst_vars(1159, _376290, [], _377230)
^  Unify: (260) [user] subst_vars(1159, 1159, [], [])
^  Exit: (260) [user] subst_vars(1159, 1159, [], [])
^  Call: (260) [user] subst_vars([0], _376292, [], _345482)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _376292, [], _345482)
^  Unify: (260) [user] subst_vars([0], [_392162|_392164], [], _345482)
^  Call: (261) [user] subst_vars(0, _392162, [], _393102)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _392162, [], _393102)
^  Unify: (261) [user] subst_vars(0, _392162, [], _393102)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _392162, [], _393102)
^  Unify: (261) [user] subst_vars(0, _392162, [], _393102)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _392162, [], _393102)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _392164, [], _345482)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _392164, [], _345482)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1159, 0], [1159, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0], [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0], [], [])
   Call: (258) [system] compound_name_arguments(_345480, '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), [], [])
   Call: (257) [system] _415520=metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program1)),", 1159, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1160, 0, 42415, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$stream_position'(42415, 1160, 0, 42415)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _468246))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _468246))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _468246)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _468246)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _468246)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _468246)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _473858))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _473858))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _473858))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _473858))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _473858)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _473858)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _479444))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _479444))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _479444)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _479444)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _479444)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _479444)
   Call: (270) [system] var('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _479444)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$VAR'(_486904))
   Call: (270) [system] atom('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _479444)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _479444)
   Call: (270) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _479444)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _479444)
   Call: (270) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _479444)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _479444)
   Call: (270) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0)==[_496184, _496190]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _479444)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _479444)
   Call: (270) [system] is_list('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _479444)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _479444)
   Call: (270) [system] string('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _479444)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _479444)
   Call: (270) [system] compound('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _506386, _506388)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT', [";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0], _510128)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0], _510128)
   Call: (271) [apply] apply:maplist_([";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0], _510128, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0], [_512946|_512948], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"c\")]]));", _512946)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"c\")]]));", _512946)
   Call: (273) [system] var(";;         Ok(vec![vec![expr!(\"c\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"c\")]]));", _512946)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"c\")]]));", '$VAR'(_517592))
   Call: (273) [system] atom(";;         Ok(vec![vec![expr!(\"c\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"c\")]]));", _512946)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"c\")]]));", _512946)
   Call: (273) [system] ";;         Ok(vec![vec![expr!(\"c\")]]));"==true
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"c\")]]));", _512946)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"c\")]]));", _512946)
   Call: (273) [system] ";;         Ok(vec![vec![expr!(\"c\")]]));"==false
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"c\")]]));", _6032)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"c\")]]));", _6032)
   Call: (273) [system] ";;         Ok(vec![vec![expr!(\"c\")]]));"==[_8786, _8792]
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"c\")]]));", _6032)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"c\")]]));", _6032)
   Call: (273) [system] is_list(";;         Ok(vec![vec![expr!(\"c\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"c\")]]));", _6032)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"c\")]]));", _6032)
   Call: (273) [system] string(";;         Ok(vec![vec![expr!(\"c\")]]));")
   Exit: (273) [system] string(";;         Ok(vec![vec![expr!(\"c\")]]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"c\")]]));", _6032)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"c\")]]));", _6032)
   Call: (273) [system] compound(";;         Ok(vec![vec![expr!(\"c\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"c\")]]));", _6032)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"c\")]]));", _6032)
^  Call: (273) [user] symbol(";;         Ok(vec![vec![expr!(\"c\")]]));")
^  Unify: (273) [user] symbol(";;         Ok(vec![vec![expr!(\"c\")]]));")
   Call: (274) [system] atom(";;         Ok(vec![vec![expr!(\"c\")]]));")
   Fail: (274) [system] atom(";;         Ok(vec![vec![expr!(\"c\")]]));")
^  Fail: (273) [user] symbol(";;         Ok(vec![vec![expr!(\"c\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"c\")]]));", _6032)
   Call: (273) [system] ";;         Ok(vec![vec![expr!(\"c\")]]));"=_6032
   Exit: (273) [system] ";;         Ok(vec![vec![expr!(\"c\")]]));"=";;         Ok(vec![vec![expr!(\"c\")]]));"
^  Exit: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"c\")]]));", ";;         Ok(vec![vec![expr!(\"c\")]]));")
   Call: (272) [apply] apply:maplist_([1160, 0], _6034, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1160, 0], [_32858|_32860], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1160, _32858)
^  Unify: (273) [user] mfix_vars1(1160, _32858)
   Call: (274) [system] var(1160)
^  Redo: (273) [user] mfix_vars1(1160, _32858)
^  Unify: (273) [user] mfix_vars1(1160, '$VAR'(_37504))
   Call: (274) [system] atom(1160)
^  Redo: (273) [user] mfix_vars1(1160, _32858)
^  Unify: (273) [user] mfix_vars1(1160, _32858)
   Call: (274) [system] 1160==true
^  Redo: (273) [user] mfix_vars1(1160, _32858)
^  Unify: (273) [user] mfix_vars1(1160, _32858)
   Call: (274) [system] 1160==false
^  Redo: (273) [user] mfix_vars1(1160, _32858)
^  Unify: (273) [user] mfix_vars1(1160, _32858)
   Call: (274) [system] 1160==[_46784, _46790]
^  Redo: (273) [user] mfix_vars1(1160, _32858)
^  Unify: (273) [user] mfix_vars1(1160, _32858)
   Call: (274) [system] is_list(1160)
^  Redo: (273) [user] mfix_vars1(1160, _32858)
^  Unify: (273) [user] mfix_vars1(1160, _32858)
   Call: (274) [system] string(1160)
^  Redo: (273) [user] mfix_vars1(1160, _32858)
^  Unify: (273) [user] mfix_vars1(1160, _32858)
   Call: (274) [system] compound(1160)
^  Redo: (273) [user] mfix_vars1(1160, _32858)
^  Unify: (273) [user] mfix_vars1(1160, _32858)
^  Call: (274) [user] symbol(1160)
^  Unify: (274) [user] symbol(1160)
   Call: (275) [system] atom(1160)
   Fail: (275) [system] atom(1160)
^  Fail: (274) [user] symbol(1160)
^  Redo: (273) [user] mfix_vars1(1160, _32858)
   Call: (274) [system] 1160=_32858
   Exit: (274) [system] 1160=1160
^  Exit: (273) [user] mfix_vars1(1160, 1160)
   Call: (273) [apply] apply:maplist_([0], _32860, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_67184|_67186], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _67184)
^  Unify: (274) [user] mfix_vars1(0, _67184)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _67184)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_71830))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _67184)
^  Unify: (274) [user] mfix_vars1(0, _67184)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _67184)
^  Unify: (274) [user] mfix_vars1(0, _67184)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _67184)
^  Unify: (274) [user] mfix_vars1(0, _67184)
   Call: (275) [system] 0==[_81110, _81116]
^  Redo: (274) [user] mfix_vars1(0, _67184)
^  Unify: (274) [user] mfix_vars1(0, _67184)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _67184)
^  Unify: (274) [user] mfix_vars1(0, _67184)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _67184)
^  Unify: (274) [user] mfix_vars1(0, _67184)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _67184)
^  Unify: (274) [user] mfix_vars1(0, _67184)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _67184)
   Call: (275) [system] 0=_67184
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _67186, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1160, 0], [1160, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0], [";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0], [";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0])
   Call: (270) [system] compound_name_arguments(_5986, '$COMMENT', [";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT', [";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0)))
   Call: (267) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0)\=@='$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _5972)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _117358))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _117358))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _117358))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _117358))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _117358)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _117358)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _122944))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _122944))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _122944)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _122944)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _122944)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0)))
   Call: (267) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0)\=@='$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _117358)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _5952))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _5952))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _5952))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _5952))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _5952)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _145264))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _145264))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _145264)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _145264)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _145264)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0)))
   Call: (267) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0)\=@='$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0)))
   Call: (261) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0)\=@='$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _174042, [], _174044)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _174042, [], _174044)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _174042, [], _174044)
   Call: (258) [system] atom('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _174042, [], _174044)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _174042, [], _174044)
   Call: (258) [system] compound('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), _183358, _183360)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT', [";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0])
^  Call: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0], _185244, [], _174044)
^  Unify: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0], [";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0], [], [])
   Call: (259) [system] var([";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0])
^  Redo: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0], _185244, [], _174044)
^  Unify: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0], [_188980|_188982], [], _174044)
^  Call: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"c\")]]));", _188980, [], _189920)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"c\")]]));", ";;         Ok(vec![vec![expr!(\"c\")]]));", [], [])
   Call: (260) [system] var(";;         Ok(vec![vec![expr!(\"c\")]]));")
^  Redo: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"c\")]]));", _188980, [], _189920)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"c\")]]));", _188980, [], _189920)
   Call: (260) [system] atom(";;         Ok(vec![vec![expr!(\"c\")]]));")
^  Redo: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"c\")]]));", _188980, [], _189920)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"c\")]]));", _188980, [], _189920)
   Call: (260) [system] compound(";;         Ok(vec![vec![expr!(\"c\")]]));")
^  Redo: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"c\")]]));", _188980, [], _189920)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"c\")]]));", ";;         Ok(vec![vec![expr!(\"c\")]]));", [], [])
^  Exit: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"c\")]]));", ";;         Ok(vec![vec![expr!(\"c\")]]));", [], [])
^  Call: (259) [user] subst_vars([1160, 0], _188982, [], _174044)
^  Unify: (259) [user] subst_vars([1160, 0], [1160, 0], [], [])
   Call: (260) [system] var([1160, 0])
^  Redo: (259) [user] subst_vars([1160, 0], _188982, [], _174044)
^  Unify: (259) [user] subst_vars([1160, 0], [_204852|_204854], [], _174044)
^  Call: (260) [user] subst_vars(1160, _204852, [], _205792)
^  Unify: (260) [user] subst_vars(1160, 1160, [], [])
   Call: (261) [system] var(1160)
^  Redo: (260) [user] subst_vars(1160, _204852, [], _205792)
^  Unify: (260) [user] subst_vars(1160, _204852, [], _205792)
   Call: (261) [system] atom(1160)
^  Redo: (260) [user] subst_vars(1160, _204852, [], _205792)
^  Unify: (260) [user] subst_vars(1160, _204852, [], _205792)
   Call: (261) [system] compound(1160)
^  Redo: (260) [user] subst_vars(1160, _204852, [], _205792)
^  Unify: (260) [user] subst_vars(1160, 1160, [], [])
^  Exit: (260) [user] subst_vars(1160, 1160, [], [])
^  Call: (260) [user] subst_vars([0], _204854, [], _174044)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _204854, [], _174044)
^  Unify: (260) [user] subst_vars([0], [_220724|_220726], [], _174044)
^  Call: (261) [user] subst_vars(0, _220724, [], _221664)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _220724, [], _221664)
^  Unify: (261) [user] subst_vars(0, _220724, [], _221664)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _220724, [], _221664)
^  Unify: (261) [user] subst_vars(0, _220724, [], _221664)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _220724, [], _221664)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _220726, [], _174044)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _220726, [], _174044)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1160, 0], [1160, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0], [";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0], [], [])
   Call: (258) [system] compound_name_arguments(_174042, '$COMMENT', [";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT', [";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), [], [])
   Call: (257) [system] _244082=metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"c\")]]));", 1160, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1161, 0, 42455, '$COMMENT'(";;", 1161, 0), '$stream_position'(42455, 1161, 0, 42455)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1161, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1161, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1161, 0), _296798))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1161, 0), _296798))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1161, 0), _296798)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1161, 0), _296798)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1161, 0), _296798)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1161, 0), _296798)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1161, 0), _302410))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1161, 0), _302410))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1161, 0), _302410))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1161, 0), _302410))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1161, 0), _302410)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1161, 0), _302410)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1161, 0), _307996))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1161, 0), _307996))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1161, 0), _307996)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1161, 0), _307996)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1161, 0), _307996)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1161, 0), _307996)
   Call: (270) [system] var('$COMMENT'(";;", 1161, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1161, 0), _307996)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1161, 0), '$VAR'(_315456))
   Call: (270) [system] atom('$COMMENT'(";;", 1161, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1161, 0), _307996)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1161, 0), _307996)
   Call: (270) [system] '$COMMENT'(";;", 1161, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1161, 0), _307996)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1161, 0), _307996)
   Call: (270) [system] '$COMMENT'(";;", 1161, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1161, 0), _307996)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1161, 0), _307996)
   Call: (270) [system] '$COMMENT'(";;", 1161, 0)==[_324736, _324742]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1161, 0), _307996)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1161, 0), _307996)
   Call: (270) [system] is_list('$COMMENT'(";;", 1161, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1161, 0), _307996)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1161, 0), _307996)
   Call: (270) [system] string('$COMMENT'(";;", 1161, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1161, 0), _307996)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1161, 0), _307996)
   Call: (270) [system] compound('$COMMENT'(";;", 1161, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1161, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1161, 0), _334938, _334940)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1161, 0), '$COMMENT', [";;", 1161, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1161, 0], _338680)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1161, 0], _338680)
   Call: (271) [apply] apply:maplist_([";;", 1161, 0], _338680, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1161, 0], [_341498|_341500], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _341498)
^  Unify: (272) [user] mfix_vars1(";;", _341498)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _341498)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_346144))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _341498)
^  Unify: (272) [user] mfix_vars1(";;", _341498)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _341498)
^  Unify: (272) [user] mfix_vars1(";;", _341498)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _341498)
^  Unify: (272) [user] mfix_vars1(";;", _341498)
   Call: (273) [system] ";;"==[_355424, _355430]
^  Redo: (272) [user] mfix_vars1(";;", _341498)
^  Unify: (272) [user] mfix_vars1(";;", _341498)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _341498)
^  Unify: (272) [user] mfix_vars1(";;", _341498)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _341498)
^  Unify: (272) [user] mfix_vars1(";;", _341498)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _341498)
^  Unify: (272) [user] mfix_vars1(";;", _341498)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _341498)
   Call: (273) [system] ";;"=_341498
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1161, 0], _341500, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1161, 0], [_379496|_379498], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1161, _379496)
^  Unify: (273) [user] mfix_vars1(1161, _379496)
   Call: (274) [system] var(1161)
^  Redo: (273) [user] mfix_vars1(1161, _379496)
^  Unify: (273) [user] mfix_vars1(1161, '$VAR'(_384142))
   Call: (274) [system] atom(1161)
^  Redo: (273) [user] mfix_vars1(1161, _379496)
^  Unify: (273) [user] mfix_vars1(1161, _379496)
   Call: (274) [system] 1161==true
^  Redo: (273) [user] mfix_vars1(1161, _379496)
^  Unify: (273) [user] mfix_vars1(1161, _379496)
   Call: (274) [system] 1161==false
^  Redo: (273) [user] mfix_vars1(1161, _379496)
^  Unify: (273) [user] mfix_vars1(1161, _379496)
   Call: (274) [system] 1161==[_393422, _393428]
^  Redo: (273) [user] mfix_vars1(1161, _379496)
^  Unify: (273) [user] mfix_vars1(1161, _379496)
   Call: (274) [system] is_list(1161)
^  Redo: (273) [user] mfix_vars1(1161, _379496)
^  Unify: (273) [user] mfix_vars1(1161, _379496)
   Call: (274) [system] string(1161)
^  Redo: (273) [user] mfix_vars1(1161, _379496)
^  Unify: (273) [user] mfix_vars1(1161, _379496)
   Call: (274) [system] compound(1161)
^  Redo: (273) [user] mfix_vars1(1161, _379496)
^  Unify: (273) [user] mfix_vars1(1161, _379496)
^  Call: (274) [user] symbol(1161)
^  Unify: (274) [user] symbol(1161)
   Call: (275) [system] atom(1161)
   Fail: (275) [system] atom(1161)
^  Fail: (274) [user] symbol(1161)
^  Redo: (273) [user] mfix_vars1(1161, _379496)
   Call: (274) [system] 1161=_379496
   Exit: (274) [system] 1161=1161
^  Exit: (273) [user] mfix_vars1(1161, 1161)
   Call: (273) [apply] apply:maplist_([0], _379498, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_413822|_413824], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _413822)
^  Unify: (274) [user] mfix_vars1(0, _413822)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _413822)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_418468))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _413822)
^  Unify: (274) [user] mfix_vars1(0, _413822)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _413822)
^  Unify: (274) [user] mfix_vars1(0, _413822)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _413822)
^  Unify: (274) [user] mfix_vars1(0, _413822)
   Call: (275) [system] 0==[_427748, _427754]
^  Redo: (274) [user] mfix_vars1(0, _413822)
^  Unify: (274) [user] mfix_vars1(0, _413822)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _413822)
^  Unify: (274) [user] mfix_vars1(0, _413822)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _413822)
^  Unify: (274) [user] mfix_vars1(0, _413822)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _413822)
^  Unify: (274) [user] mfix_vars1(0, _413822)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _413822)
   Call: (275) [system] 0=_413822
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _413824, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1161, 0], [1161, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1161, 0], [";;", 1161, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1161, 0], [";;", 1161, 0])
   Call: (270) [system] compound_name_arguments(_307996, '$COMMENT', [";;", 1161, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1161, 0), '$COMMENT', [";;", 1161, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1161, 0)\=@='$COMMENT'(";;", 1161, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1161, 0), _302410)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1161, 0), _463996))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1161, 0), _463996))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1161, 0), _463996))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1161, 0), _463996))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1161, 0), _463996)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1161, 0), _463996)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1161, 0), _469582))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1161, 0), _469582))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1161, 0), _469582)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1161, 0), _469582)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1161, 0), _469582)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1161, 0)\=@='$COMMENT'(";;", 1161, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1161, 0), _463996)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1161, 0), _296798))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1161, 0), _296798))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1161, 0), _296798))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1161, 0), _296798))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1161, 0), _296798)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1161, 0), _296798)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1161, 0), _491902))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1161, 0), _491902))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1161, 0), _491902)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1161, 0), _491902)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1161, 0), _491902)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1161, 0)\=@='$COMMENT'(";;", 1161, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1161, 0), _296798)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1161, 0)\=@='$COMMENT'(";;", 1161, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1161, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1161, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1161, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1161, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1161, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1161, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1161, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1161, 0), _520680, [], _520682)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1161, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1161, 0), _5936, [], _5938)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1161, 0), _5936, [], _5938)
   Call: (258) [system] atom('$COMMENT'(";;", 1161, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1161, 0), _5936, [], _5938)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1161, 0), _5936, [], _5938)
   Call: (258) [system] compound('$COMMENT'(";;", 1161, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1161, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1161, 0), _12052, _12054)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1161, 0), '$COMMENT', [";;", 1161, 0])
^  Call: (258) [user] subst_vars([";;", 1161, 0], _13938, [], _5938)
^  Unify: (258) [user] subst_vars([";;", 1161, 0], [";;", 1161, 0], [], [])
   Call: (259) [system] var([";;", 1161, 0])
^  Redo: (258) [user] subst_vars([";;", 1161, 0], _13938, [], _5938)
^  Unify: (258) [user] subst_vars([";;", 1161, 0], [_17674|_17676], [], _5938)
^  Call: (259) [user] subst_vars(";;", _17674, [], _18614)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _17674, [], _18614)
^  Unify: (259) [user] subst_vars(";;", _17674, [], _18614)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _17674, [], _18614)
^  Unify: (259) [user] subst_vars(";;", _17674, [], _18614)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _17674, [], _18614)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1161, 0], _17676, [], _5938)
^  Unify: (259) [user] subst_vars([1161, 0], [1161, 0], [], [])
   Call: (260) [system] var([1161, 0])
^  Redo: (259) [user] subst_vars([1161, 0], _17676, [], _5938)
^  Unify: (259) [user] subst_vars([1161, 0], [_33546|_33548], [], _5938)
^  Call: (260) [user] subst_vars(1161, _33546, [], _34486)
^  Unify: (260) [user] subst_vars(1161, 1161, [], [])
   Call: (261) [system] var(1161)
^  Redo: (260) [user] subst_vars(1161, _33546, [], _34486)
^  Unify: (260) [user] subst_vars(1161, _33546, [], _34486)
   Call: (261) [system] atom(1161)
^  Redo: (260) [user] subst_vars(1161, _33546, [], _34486)
^  Unify: (260) [user] subst_vars(1161, _33546, [], _34486)
   Call: (261) [system] compound(1161)
^  Redo: (260) [user] subst_vars(1161, _33546, [], _34486)
^  Unify: (260) [user] subst_vars(1161, 1161, [], [])
^  Exit: (260) [user] subst_vars(1161, 1161, [], [])
^  Call: (260) [user] subst_vars([0], _33548, [], _5938)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _33548, [], _5938)
^  Unify: (260) [user] subst_vars([0], [_49418|_49420], [], _5938)
^  Call: (261) [user] subst_vars(0, _49418, [], _50358)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _49418, [], _50358)
^  Unify: (261) [user] subst_vars(0, _49418, [], _50358)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _49418, [], _50358)
^  Unify: (261) [user] subst_vars(0, _49418, [], _50358)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _49418, [], _50358)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _49420, [], _5938)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _49420, [], _5938)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1161, 0], [1161, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1161, 0], [";;", 1161, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5936, '$COMMENT', [";;", 1161, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1161, 0), '$COMMENT', [";;", 1161, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1161, 0), '$COMMENT'(";;", 1161, 0), [], [])
   Call: (257) [system] _72776=metta_file_buffer(+, '$COMMENT'(";;", 1161, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1161, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1161, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1161, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1161, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1161, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1161, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1161, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1161, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1162, 0, 42458, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$stream_position'(42458, 1162, 0, 42458)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _125506))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _125506))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _125506)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _125506)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _125506)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _125506)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _131118))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _131118))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _131118))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _131118))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _131118)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _131118)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _136704))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _136704))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _136704)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _136704)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _136704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _136704)
   Call: (270) [system] var('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _136704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$VAR'(_144164))
   Call: (270) [system] atom('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _136704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _136704)
   Call: (270) [system] '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _136704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _136704)
   Call: (270) [system] '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _136704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _136704)
   Call: (270) [system] '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0)==[_153444, _153450]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _136704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _136704)
   Call: (270) [system] is_list('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _136704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _136704)
   Call: (270) [system] string('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _136704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _136704)
   Call: (270) [system] compound('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _163646, _163648)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT', [";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0], _167388)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0], _167388)
   Call: (271) [apply] apply:maplist_([";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0], _167388, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0], [_170206|_170208], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _170206)
^  Unify: (272) [user] mfix_vars1(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _170206)
   Call: (273) [system] var(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";")
^  Redo: (272) [user] mfix_vars1(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _170206)
^  Unify: (272) [user] mfix_vars1(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", '$VAR'(_174852))
   Call: (273) [system] atom(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";")
^  Redo: (272) [user] mfix_vars1(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _170206)
^  Unify: (272) [user] mfix_vars1(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _170206)
   Call: (273) [system] ";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";"==true
^  Redo: (272) [user] mfix_vars1(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _170206)
^  Unify: (272) [user] mfix_vars1(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _170206)
   Call: (273) [system] ";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";"==false
^  Redo: (272) [user] mfix_vars1(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _170206)
^  Unify: (272) [user] mfix_vars1(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _170206)
   Call: (273) [system] ";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";"==[_184132, _184138]
^  Redo: (272) [user] mfix_vars1(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _170206)
^  Unify: (272) [user] mfix_vars1(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _170206)
   Call: (273) [system] is_list(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";")
^  Redo: (272) [user] mfix_vars1(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _170206)
^  Unify: (272) [user] mfix_vars1(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _170206)
   Call: (273) [system] string(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";")
   Exit: (273) [system] string(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _170206)
^  Unify: (272) [user] mfix_vars1(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _170206)
   Call: (273) [system] compound(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";")
^  Redo: (272) [user] mfix_vars1(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _170206)
^  Unify: (272) [user] mfix_vars1(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _170206)
^  Call: (273) [user] symbol(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";")
^  Unify: (273) [user] symbol(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";")
   Call: (274) [system] atom(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";")
   Fail: (274) [system] atom(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";")
^  Fail: (273) [user] symbol(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";")
^  Redo: (272) [user] mfix_vars1(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _170206)
   Call: (273) [system] ";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";"=_170206
   Exit: (273) [system] ";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";"=";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";"
^  Exit: (272) [user] mfix_vars1(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", ";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";")
   Call: (272) [apply] apply:maplist_([1162, 0], _170208, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1162, 0], [_208204|_208206], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1162, _208204)
^  Unify: (273) [user] mfix_vars1(1162, _208204)
   Call: (274) [system] var(1162)
^  Redo: (273) [user] mfix_vars1(1162, _208204)
^  Unify: (273) [user] mfix_vars1(1162, '$VAR'(_212850))
   Call: (274) [system] atom(1162)
^  Redo: (273) [user] mfix_vars1(1162, _208204)
^  Unify: (273) [user] mfix_vars1(1162, _208204)
   Call: (274) [system] 1162==true
^  Redo: (273) [user] mfix_vars1(1162, _208204)
^  Unify: (273) [user] mfix_vars1(1162, _208204)
   Call: (274) [system] 1162==false
^  Redo: (273) [user] mfix_vars1(1162, _208204)
^  Unify: (273) [user] mfix_vars1(1162, _208204)
   Call: (274) [system] 1162==[_222130, _222136]
^  Redo: (273) [user] mfix_vars1(1162, _208204)
^  Unify: (273) [user] mfix_vars1(1162, _208204)
   Call: (274) [system] is_list(1162)
^  Redo: (273) [user] mfix_vars1(1162, _208204)
^  Unify: (273) [user] mfix_vars1(1162, _208204)
   Call: (274) [system] string(1162)
^  Redo: (273) [user] mfix_vars1(1162, _208204)
^  Unify: (273) [user] mfix_vars1(1162, _208204)
   Call: (274) [system] compound(1162)
^  Redo: (273) [user] mfix_vars1(1162, _208204)
^  Unify: (273) [user] mfix_vars1(1162, _208204)
^  Call: (274) [user] symbol(1162)
^  Unify: (274) [user] symbol(1162)
   Call: (275) [system] atom(1162)
   Fail: (275) [system] atom(1162)
^  Fail: (274) [user] symbol(1162)
^  Redo: (273) [user] mfix_vars1(1162, _208204)
   Call: (274) [system] 1162=_208204
   Exit: (274) [system] 1162=1162
^  Exit: (273) [user] mfix_vars1(1162, 1162)
   Call: (273) [apply] apply:maplist_([0], _208206, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_242530|_242532], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _242530)
^  Unify: (274) [user] mfix_vars1(0, _242530)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _242530)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_247176))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _242530)
^  Unify: (274) [user] mfix_vars1(0, _242530)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _242530)
^  Unify: (274) [user] mfix_vars1(0, _242530)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _242530)
^  Unify: (274) [user] mfix_vars1(0, _242530)
   Call: (275) [system] 0==[_256456, _256462]
^  Redo: (274) [user] mfix_vars1(0, _242530)
^  Unify: (274) [user] mfix_vars1(0, _242530)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _242530)
^  Unify: (274) [user] mfix_vars1(0, _242530)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _242530)
^  Unify: (274) [user] mfix_vars1(0, _242530)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _242530)
^  Unify: (274) [user] mfix_vars1(0, _242530)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _242530)
   Call: (275) [system] 0=_242530
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _242532, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1162, 0], [1162, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0], [";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0], [";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0])
   Call: (270) [system] compound_name_arguments(_136704, '$COMMENT', [";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT', [";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0)))
   Call: (267) [system] '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0)\=@='$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _131118)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _292704))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _292704))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _292704))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _292704))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _292704)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _292704)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _298290))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _298290))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _298290)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _298290)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _298290)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0)))
   Call: (267) [system] '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0)\=@='$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _292704)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _125506))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _125506))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _125506))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _125506))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _125506)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _125506)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _320610))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _320610))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _320610)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _320610)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _320610)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0)))
   Call: (267) [system] '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0)\=@='$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _125506)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0)))
   Call: (261) [system] '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0)\=@='$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _349388, [], _349390)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _349388, [], _349390)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _349388, [], _349390)
   Call: (258) [system] atom('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _349388, [], _349390)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _349388, [], _349390)
   Call: (258) [system] compound('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), _358704, _358706)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT', [";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0])
^  Call: (258) [user] subst_vars([";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0], _360590, [], _349390)
^  Unify: (258) [user] subst_vars([";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0], [";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0], [], [])
   Call: (259) [system] var([";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0])
^  Redo: (258) [user] subst_vars([";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0], _360590, [], _349390)
^  Unify: (258) [user] subst_vars([";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0], [_364326|_364328], [], _349390)
^  Call: (259) [user] subst_vars(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _364326, [], _365266)
^  Unify: (259) [user] subst_vars(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", ";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", [], [])
   Call: (260) [system] var(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";")
^  Redo: (259) [user] subst_vars(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _364326, [], _365266)
^  Unify: (259) [user] subst_vars(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _364326, [], _365266)
   Call: (260) [system] atom(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";")
^  Redo: (259) [user] subst_vars(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _364326, [], _365266)
^  Unify: (259) [user] subst_vars(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _364326, [], _365266)
   Call: (260) [system] compound(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";")
^  Redo: (259) [user] subst_vars(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", _364326, [], _365266)
^  Unify: (259) [user] subst_vars(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", ";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", [], [])
^  Exit: (259) [user] subst_vars(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", ";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", [], [])
^  Call: (259) [user] subst_vars([1162, 0], _364328, [], _349390)
^  Unify: (259) [user] subst_vars([1162, 0], [1162, 0], [], [])
   Call: (260) [system] var([1162, 0])
^  Redo: (259) [user] subst_vars([1162, 0], _364328, [], _349390)
^  Unify: (259) [user] subst_vars([1162, 0], [_380198|_380200], [], _349390)
^  Call: (260) [user] subst_vars(1162, _380198, [], _381138)
^  Unify: (260) [user] subst_vars(1162, 1162, [], [])
   Call: (261) [system] var(1162)
^  Redo: (260) [user] subst_vars(1162, _380198, [], _381138)
^  Unify: (260) [user] subst_vars(1162, _380198, [], _381138)
   Call: (261) [system] atom(1162)
^  Redo: (260) [user] subst_vars(1162, _380198, [], _381138)
^  Unify: (260) [user] subst_vars(1162, _380198, [], _381138)
   Call: (261) [system] compound(1162)
^  Redo: (260) [user] subst_vars(1162, _380198, [], _381138)
^  Unify: (260) [user] subst_vars(1162, 1162, [], [])
^  Exit: (260) [user] subst_vars(1162, 1162, [], [])
^  Call: (260) [user] subst_vars([0], _380200, [], _349390)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _380200, [], _349390)
^  Unify: (260) [user] subst_vars([0], [_396070|_396072], [], _349390)
^  Call: (261) [user] subst_vars(0, _396070, [], _397010)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _396070, [], _397010)
^  Unify: (261) [user] subst_vars(0, _396070, [], _397010)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _396070, [], _397010)
^  Unify: (261) [user] subst_vars(0, _396070, [], _397010)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _396070, [], _397010)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _396072, [], _349390)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _396072, [], _349390)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1162, 0], [1162, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0], [";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0], [], [])
   Call: (258) [system] compound_name_arguments(_349388, '$COMMENT', [";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT', [";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), [], [])
   Call: (257) [system] _419428=metta_file_buffer(+, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program2 = \"!(metta (foo a) %Undefined% &self)\";", 1162, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1163, 0, 42518, '$COMMENT'(";;", 1163, 0), '$stream_position'(42518, 1163, 0, 42518)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1163, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1163, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1163, 0), _472144))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1163, 0), _472144))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1163, 0), _472144)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1163, 0), _472144)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1163, 0), _472144)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1163, 0), _472144)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1163, 0), _477756))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1163, 0), _477756))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1163, 0), _477756))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1163, 0), _477756))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1163, 0), _477756)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1163, 0), _477756)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1163, 0), _483342))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1163, 0), _483342))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1163, 0), _483342)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1163, 0), _483342)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1163, 0), _483342)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1163, 0), _483342)
   Call: (270) [system] var('$COMMENT'(";;", 1163, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1163, 0), _483342)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1163, 0), '$VAR'(_490802))
   Call: (270) [system] atom('$COMMENT'(";;", 1163, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1163, 0), _483342)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1163, 0), _483342)
   Call: (270) [system] '$COMMENT'(";;", 1163, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1163, 0), _483342)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1163, 0), _483342)
   Call: (270) [system] '$COMMENT'(";;", 1163, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1163, 0), _483342)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1163, 0), _483342)
   Call: (270) [system] '$COMMENT'(";;", 1163, 0)==[_500082, _500088]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1163, 0), _483342)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1163, 0), _483342)
   Call: (270) [system] is_list('$COMMENT'(";;", 1163, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1163, 0), _483342)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1163, 0), _483342)
   Call: (270) [system] string('$COMMENT'(";;", 1163, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1163, 0), _483342)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1163, 0), _483342)
   Call: (270) [system] compound('$COMMENT'(";;", 1163, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1163, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1163, 0), _510284, _510286)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1163, 0), '$COMMENT', [";;", 1163, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1163, 0], _514026)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1163, 0], _514026)
   Call: (271) [apply] apply:maplist_([";;", 1163, 0], _514026, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1163, 0], [_516844|_516846], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _516844)
^  Unify: (272) [user] mfix_vars1(";;", _516844)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _516844)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_521490))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] ";;"==[_12876, _12882]
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] ";;"=_6022
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1163, 0], _6024, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1163, 0], [_36948|_36950], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1163, _36948)
^  Unify: (273) [user] mfix_vars1(1163, _36948)
   Call: (274) [system] var(1163)
^  Redo: (273) [user] mfix_vars1(1163, _36948)
^  Unify: (273) [user] mfix_vars1(1163, '$VAR'(_41594))
   Call: (274) [system] atom(1163)
^  Redo: (273) [user] mfix_vars1(1163, _36948)
^  Unify: (273) [user] mfix_vars1(1163, _36948)
   Call: (274) [system] 1163==true
^  Redo: (273) [user] mfix_vars1(1163, _36948)
^  Unify: (273) [user] mfix_vars1(1163, _36948)
   Call: (274) [system] 1163==false
^  Redo: (273) [user] mfix_vars1(1163, _36948)
^  Unify: (273) [user] mfix_vars1(1163, _36948)
   Call: (274) [system] 1163==[_50874, _50880]
^  Redo: (273) [user] mfix_vars1(1163, _36948)
^  Unify: (273) [user] mfix_vars1(1163, _36948)
   Call: (274) [system] is_list(1163)
^  Redo: (273) [user] mfix_vars1(1163, _36948)
^  Unify: (273) [user] mfix_vars1(1163, _36948)
   Call: (274) [system] string(1163)
^  Redo: (273) [user] mfix_vars1(1163, _36948)
^  Unify: (273) [user] mfix_vars1(1163, _36948)
   Call: (274) [system] compound(1163)
^  Redo: (273) [user] mfix_vars1(1163, _36948)
^  Unify: (273) [user] mfix_vars1(1163, _36948)
^  Call: (274) [user] symbol(1163)
^  Unify: (274) [user] symbol(1163)
   Call: (275) [system] atom(1163)
   Fail: (275) [system] atom(1163)
^  Fail: (274) [user] symbol(1163)
^  Redo: (273) [user] mfix_vars1(1163, _36948)
   Call: (274) [system] 1163=_36948
   Exit: (274) [system] 1163=1163
^  Exit: (273) [user] mfix_vars1(1163, 1163)
   Call: (273) [apply] apply:maplist_([0], _36950, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_71274|_71276], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _71274)
^  Unify: (274) [user] mfix_vars1(0, _71274)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _71274)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_75920))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _71274)
^  Unify: (274) [user] mfix_vars1(0, _71274)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _71274)
^  Unify: (274) [user] mfix_vars1(0, _71274)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _71274)
^  Unify: (274) [user] mfix_vars1(0, _71274)
   Call: (275) [system] 0==[_85200, _85206]
^  Redo: (274) [user] mfix_vars1(0, _71274)
^  Unify: (274) [user] mfix_vars1(0, _71274)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _71274)
^  Unify: (274) [user] mfix_vars1(0, _71274)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _71274)
^  Unify: (274) [user] mfix_vars1(0, _71274)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _71274)
^  Unify: (274) [user] mfix_vars1(0, _71274)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _71274)
   Call: (275) [system] 0=_71274
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _71276, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1163, 0], [1163, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1163, 0], [";;", 1163, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1163, 0], [";;", 1163, 0])
   Call: (270) [system] compound_name_arguments(_5976, '$COMMENT', [";;", 1163, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1163, 0), '$COMMENT', [";;", 1163, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1163, 0)\=@='$COMMENT'(";;", 1163, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1163, 0), _5962)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1163, 0), _121448))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1163, 0), _121448))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1163, 0), _121448))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1163, 0), _121448))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1163, 0), _121448)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1163, 0), _121448)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1163, 0), _127034))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1163, 0), _127034))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1163, 0), _127034)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1163, 0), _127034)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1163, 0), _127034)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1163, 0)\=@='$COMMENT'(";;", 1163, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1163, 0), _121448)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1163, 0), _5942))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1163, 0), _5942))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1163, 0), _5942))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1163, 0), _5942))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1163, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1163, 0), _5942)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1163, 0), _149354))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1163, 0), _149354))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1163, 0), _149354)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1163, 0), _149354)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1163, 0), _149354)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1163, 0)\=@='$COMMENT'(";;", 1163, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1163, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1163, 0)\=@='$COMMENT'(";;", 1163, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1163, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1163, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1163, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1163, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1163, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1163, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1163, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1163, 0), _178132, [], _178134)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1163, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1163, 0), _178132, [], _178134)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1163, 0), _178132, [], _178134)
   Call: (258) [system] atom('$COMMENT'(";;", 1163, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1163, 0), _178132, [], _178134)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1163, 0), _178132, [], _178134)
   Call: (258) [system] compound('$COMMENT'(";;", 1163, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1163, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1163, 0), _187448, _187450)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1163, 0), '$COMMENT', [";;", 1163, 0])
^  Call: (258) [user] subst_vars([";;", 1163, 0], _189334, [], _178134)
^  Unify: (258) [user] subst_vars([";;", 1163, 0], [";;", 1163, 0], [], [])
   Call: (259) [system] var([";;", 1163, 0])
^  Redo: (258) [user] subst_vars([";;", 1163, 0], _189334, [], _178134)
^  Unify: (258) [user] subst_vars([";;", 1163, 0], [_193070|_193072], [], _178134)
^  Call: (259) [user] subst_vars(";;", _193070, [], _194010)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _193070, [], _194010)
^  Unify: (259) [user] subst_vars(";;", _193070, [], _194010)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _193070, [], _194010)
^  Unify: (259) [user] subst_vars(";;", _193070, [], _194010)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _193070, [], _194010)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1163, 0], _193072, [], _178134)
^  Unify: (259) [user] subst_vars([1163, 0], [1163, 0], [], [])
   Call: (260) [system] var([1163, 0])
^  Redo: (259) [user] subst_vars([1163, 0], _193072, [], _178134)
^  Unify: (259) [user] subst_vars([1163, 0], [_208942|_208944], [], _178134)
^  Call: (260) [user] subst_vars(1163, _208942, [], _209882)
^  Unify: (260) [user] subst_vars(1163, 1163, [], [])
   Call: (261) [system] var(1163)
^  Redo: (260) [user] subst_vars(1163, _208942, [], _209882)
^  Unify: (260) [user] subst_vars(1163, _208942, [], _209882)
   Call: (261) [system] atom(1163)
^  Redo: (260) [user] subst_vars(1163, _208942, [], _209882)
^  Unify: (260) [user] subst_vars(1163, _208942, [], _209882)
   Call: (261) [system] compound(1163)
^  Redo: (260) [user] subst_vars(1163, _208942, [], _209882)
^  Unify: (260) [user] subst_vars(1163, 1163, [], [])
^  Exit: (260) [user] subst_vars(1163, 1163, [], [])
^  Call: (260) [user] subst_vars([0], _208944, [], _178134)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _208944, [], _178134)
^  Unify: (260) [user] subst_vars([0], [_224814|_224816], [], _178134)
^  Call: (261) [user] subst_vars(0, _224814, [], _225754)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _224814, [], _225754)
^  Unify: (261) [user] subst_vars(0, _224814, [], _225754)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _224814, [], _225754)
^  Unify: (261) [user] subst_vars(0, _224814, [], _225754)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _224814, [], _225754)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _224816, [], _178134)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _224816, [], _178134)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1163, 0], [1163, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1163, 0], [";;", 1163, 0], [], [])
   Call: (258) [system] compound_name_arguments(_178132, '$COMMENT', [";;", 1163, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1163, 0), '$COMMENT', [";;", 1163, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1163, 0), '$COMMENT'(";;", 1163, 0), [], [])
   Call: (257) [system] _248172=metta_file_buffer(+, '$COMMENT'(";;", 1163, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1163, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1163, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1163, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1163, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1163, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1163, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1163, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1163, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1164, 0, 42521, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$stream_position'(42521, 1164, 0, 42521)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _300902))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _300902))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _300902)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _300902)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _300902)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _300902)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _306514))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _306514))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _306514))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _306514))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _306514)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _306514)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _312100))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _312100))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _312100)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _312100)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _312100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _312100)
   Call: (270) [system] var('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _312100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$VAR'(_319560))
   Call: (270) [system] atom('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _312100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _312100)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _312100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _312100)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _312100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _312100)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0)==[_328840, _328846]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _312100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _312100)
   Call: (270) [system] is_list('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _312100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _312100)
   Call: (270) [system] string('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _312100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _312100)
   Call: (270) [system] compound('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _339042, _339044)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0], _342784)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0], _342784)
   Call: (271) [apply] apply:maplist_([";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0], _342784, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0], [_345602|_345604], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _345602)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _345602)
   Call: (273) [system] var(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _345602)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", '$VAR'(_350248))
   Call: (273) [system] atom(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _345602)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _345602)
   Call: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program2)),"==true
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _345602)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _345602)
   Call: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program2)),"==false
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _345602)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _345602)
   Call: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program2)),"==[_359528, _359534]
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _345602)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _345602)
   Call: (273) [system] is_list(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _345602)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _345602)
   Call: (273) [system] string(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
   Exit: (273) [system] string(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _345602)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _345602)
   Call: (273) [system] compound(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _345602)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _345602)
^  Call: (273) [user] symbol(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
^  Unify: (273) [user] symbol(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
   Call: (274) [system] atom(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
   Fail: (274) [system] atom(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
^  Fail: (273) [user] symbol(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _345602)
   Call: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program2)),"=_345602
   Exit: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program2)),"=";;     assert_eq!(metta.run(SExprParser::new(program2)),"
^  Exit: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program2)),", ";;     assert_eq!(metta.run(SExprParser::new(program2)),")
   Call: (272) [apply] apply:maplist_([1164, 0], _345604, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1164, 0], [_383600|_383602], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1164, _383600)
^  Unify: (273) [user] mfix_vars1(1164, _383600)
   Call: (274) [system] var(1164)
^  Redo: (273) [user] mfix_vars1(1164, _383600)
^  Unify: (273) [user] mfix_vars1(1164, '$VAR'(_388246))
   Call: (274) [system] atom(1164)
^  Redo: (273) [user] mfix_vars1(1164, _383600)
^  Unify: (273) [user] mfix_vars1(1164, _383600)
   Call: (274) [system] 1164==true
^  Redo: (273) [user] mfix_vars1(1164, _383600)
^  Unify: (273) [user] mfix_vars1(1164, _383600)
   Call: (274) [system] 1164==false
^  Redo: (273) [user] mfix_vars1(1164, _383600)
^  Unify: (273) [user] mfix_vars1(1164, _383600)
   Call: (274) [system] 1164==[_397526, _397532]
^  Redo: (273) [user] mfix_vars1(1164, _383600)
^  Unify: (273) [user] mfix_vars1(1164, _383600)
   Call: (274) [system] is_list(1164)
^  Redo: (273) [user] mfix_vars1(1164, _383600)
^  Unify: (273) [user] mfix_vars1(1164, _383600)
   Call: (274) [system] string(1164)
^  Redo: (273) [user] mfix_vars1(1164, _383600)
^  Unify: (273) [user] mfix_vars1(1164, _383600)
   Call: (274) [system] compound(1164)
^  Redo: (273) [user] mfix_vars1(1164, _383600)
^  Unify: (273) [user] mfix_vars1(1164, _383600)
^  Call: (274) [user] symbol(1164)
^  Unify: (274) [user] symbol(1164)
   Call: (275) [system] atom(1164)
   Fail: (275) [system] atom(1164)
^  Fail: (274) [user] symbol(1164)
^  Redo: (273) [user] mfix_vars1(1164, _383600)
   Call: (274) [system] 1164=_383600
   Exit: (274) [system] 1164=1164
^  Exit: (273) [user] mfix_vars1(1164, 1164)
   Call: (273) [apply] apply:maplist_([0], _383602, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_417926|_417928], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _417926)
^  Unify: (274) [user] mfix_vars1(0, _417926)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _417926)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_422572))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _417926)
^  Unify: (274) [user] mfix_vars1(0, _417926)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _417926)
^  Unify: (274) [user] mfix_vars1(0, _417926)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _417926)
^  Unify: (274) [user] mfix_vars1(0, _417926)
   Call: (275) [system] 0==[_431852, _431858]
^  Redo: (274) [user] mfix_vars1(0, _417926)
^  Unify: (274) [user] mfix_vars1(0, _417926)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _417926)
^  Unify: (274) [user] mfix_vars1(0, _417926)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _417926)
^  Unify: (274) [user] mfix_vars1(0, _417926)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _417926)
^  Unify: (274) [user] mfix_vars1(0, _417926)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _417926)
   Call: (275) [system] 0=_417926
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _417928, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1164, 0], [1164, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0], [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0], [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0])
   Call: (270) [system] compound_name_arguments(_312100, '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0)\=@='$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _306514)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _468100))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _468100))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _468100))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _468100))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _468100)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _468100)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _473686))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _473686))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _473686)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _473686)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _473686)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0)\=@='$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _468100)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _300902))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _300902))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _300902))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _300902))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _300902)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _300902)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _496006))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _496006))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _496006)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _496006)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _496006)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0)\=@='$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _300902)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0)))
   Call: (261) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0)\=@='$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _6730, [], _6732)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _6730, [], _6732)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _6730, [], _6732)
   Call: (258) [system] atom('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _6730, [], _6732)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _6730, [], _6732)
   Call: (258) [system] compound('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), _16046, _16048)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0])
^  Call: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0], _17932, [], _6732)
^  Unify: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0], [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0], [], [])
   Call: (259) [system] var([";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0])
^  Redo: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0], _17932, [], _6732)
^  Unify: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0], [_21668|_21670], [], _6732)
^  Call: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _21668, [], _22608)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program2)),", ";;     assert_eq!(metta.run(SExprParser::new(program2)),", [], [])
   Call: (260) [system] var(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _21668, [], _22608)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _21668, [], _22608)
   Call: (260) [system] atom(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _21668, [], _22608)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _21668, [], _22608)
   Call: (260) [system] compound(";;     assert_eq!(metta.run(SExprParser::new(program2)),")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program2)),", _21668, [], _22608)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program2)),", ";;     assert_eq!(metta.run(SExprParser::new(program2)),", [], [])
^  Exit: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program2)),", ";;     assert_eq!(metta.run(SExprParser::new(program2)),", [], [])
^  Call: (259) [user] subst_vars([1164, 0], _21670, [], _6732)
^  Unify: (259) [user] subst_vars([1164, 0], [1164, 0], [], [])
   Call: (260) [system] var([1164, 0])
^  Redo: (259) [user] subst_vars([1164, 0], _21670, [], _6732)
^  Unify: (259) [user] subst_vars([1164, 0], [_37540|_37542], [], _6732)
^  Call: (260) [user] subst_vars(1164, _37540, [], _38480)
^  Unify: (260) [user] subst_vars(1164, 1164, [], [])
   Call: (261) [system] var(1164)
^  Redo: (260) [user] subst_vars(1164, _37540, [], _38480)
^  Unify: (260) [user] subst_vars(1164, _37540, [], _38480)
   Call: (261) [system] atom(1164)
^  Redo: (260) [user] subst_vars(1164, _37540, [], _38480)
^  Unify: (260) [user] subst_vars(1164, _37540, [], _38480)
   Call: (261) [system] compound(1164)
^  Redo: (260) [user] subst_vars(1164, _37540, [], _38480)
^  Unify: (260) [user] subst_vars(1164, 1164, [], [])
^  Exit: (260) [user] subst_vars(1164, 1164, [], [])
^  Call: (260) [user] subst_vars([0], _37542, [], _6732)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _37542, [], _6732)
^  Unify: (260) [user] subst_vars([0], [_53412|_53414], [], _6732)
^  Call: (261) [user] subst_vars(0, _53412, [], _54352)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _53412, [], _54352)
^  Unify: (261) [user] subst_vars(0, _53412, [], _54352)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _53412, [], _54352)
^  Unify: (261) [user] subst_vars(0, _53412, [], _54352)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _53412, [], _54352)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _53414, [], _6732)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _53414, [], _6732)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1164, 0], [1164, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0], [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0], [], [])
   Call: (258) [system] compound_name_arguments(_6730, '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), [], [])
   Call: (257) [system] _76770=metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program2)),", 1164, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1165, 0, 42578, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$stream_position'(42578, 1165, 0, 42578)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _129506))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _129506))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _129506)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _129506)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _129506)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _129506)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _135118))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _135118))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _135118))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _135118))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _135118)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _135118)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _140704))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _140704))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _140704)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _140704)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _140704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _140704)
   Call: (270) [system] var('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _140704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$VAR'(_148164))
   Call: (270) [system] atom('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _140704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _140704)
   Call: (270) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _140704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _140704)
   Call: (270) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _140704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _140704)
   Call: (270) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0)==[_157444, _157450]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _140704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _140704)
   Call: (270) [system] is_list('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _140704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _140704)
   Call: (270) [system] string('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _140704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _140704)
   Call: (270) [system] compound('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _167646, _167648)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0], _171388)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0], _171388)
   Call: (271) [apply] apply:maplist_([";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0], _171388, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0], [_174206|_174208], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _174206)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _174206)
   Call: (273) [system] var(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _174206)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", '$VAR'(_178852))
   Call: (273) [system] atom(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _174206)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _174206)
   Call: (273) [system] ";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));"==true
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _174206)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _174206)
   Call: (273) [system] ";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));"==false
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _174206)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _174206)
   Call: (273) [system] ";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));"==[_188132, _188138]
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _174206)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _174206)
   Call: (273) [system] is_list(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _174206)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _174206)
   Call: (273) [system] string(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));")
   Exit: (273) [system] string(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _174206)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _174206)
   Call: (273) [system] compound(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _174206)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _174206)
^  Call: (273) [user] symbol(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));")
^  Unify: (273) [user] symbol(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));")
   Call: (274) [system] atom(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));")
   Fail: (274) [system] atom(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));")
^  Fail: (273) [user] symbol(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _174206)
   Call: (273) [system] ";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));"=_174206
   Exit: (273) [system] ";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));"=";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));"
^  Exit: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", ";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));")
   Call: (272) [apply] apply:maplist_([1165, 0], _174208, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1165, 0], [_212204|_212206], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1165, _212204)
^  Unify: (273) [user] mfix_vars1(1165, _212204)
   Call: (274) [system] var(1165)
^  Redo: (273) [user] mfix_vars1(1165, _212204)
^  Unify: (273) [user] mfix_vars1(1165, '$VAR'(_216850))
   Call: (274) [system] atom(1165)
^  Redo: (273) [user] mfix_vars1(1165, _212204)
^  Unify: (273) [user] mfix_vars1(1165, _212204)
   Call: (274) [system] 1165==true
^  Redo: (273) [user] mfix_vars1(1165, _212204)
^  Unify: (273) [user] mfix_vars1(1165, _212204)
   Call: (274) [system] 1165==false
^  Redo: (273) [user] mfix_vars1(1165, _212204)
^  Unify: (273) [user] mfix_vars1(1165, _212204)
   Call: (274) [system] 1165==[_226130, _226136]
^  Redo: (273) [user] mfix_vars1(1165, _212204)
^  Unify: (273) [user] mfix_vars1(1165, _212204)
   Call: (274) [system] is_list(1165)
^  Redo: (273) [user] mfix_vars1(1165, _212204)
^  Unify: (273) [user] mfix_vars1(1165, _212204)
   Call: (274) [system] string(1165)
^  Redo: (273) [user] mfix_vars1(1165, _212204)
^  Unify: (273) [user] mfix_vars1(1165, _212204)
   Call: (274) [system] compound(1165)
^  Redo: (273) [user] mfix_vars1(1165, _212204)
^  Unify: (273) [user] mfix_vars1(1165, _212204)
^  Call: (274) [user] symbol(1165)
^  Unify: (274) [user] symbol(1165)
   Call: (275) [system] atom(1165)
   Fail: (275) [system] atom(1165)
^  Fail: (274) [user] symbol(1165)
^  Redo: (273) [user] mfix_vars1(1165, _212204)
   Call: (274) [system] 1165=_212204
   Exit: (274) [system] 1165=1165
^  Exit: (273) [user] mfix_vars1(1165, 1165)
   Call: (273) [apply] apply:maplist_([0], _212206, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_246530|_246532], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _246530)
^  Unify: (274) [user] mfix_vars1(0, _246530)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _246530)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_251176))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _246530)
^  Unify: (274) [user] mfix_vars1(0, _246530)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _246530)
^  Unify: (274) [user] mfix_vars1(0, _246530)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _246530)
^  Unify: (274) [user] mfix_vars1(0, _246530)
   Call: (275) [system] 0==[_260456, _260462]
^  Redo: (274) [user] mfix_vars1(0, _246530)
^  Unify: (274) [user] mfix_vars1(0, _246530)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _246530)
^  Unify: (274) [user] mfix_vars1(0, _246530)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _246530)
^  Unify: (274) [user] mfix_vars1(0, _246530)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _246530)
^  Unify: (274) [user] mfix_vars1(0, _246530)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _246530)
   Call: (275) [system] 0=_246530
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _246532, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1165, 0], [1165, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0], [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0], [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0])
   Call: (270) [system] compound_name_arguments(_140704, '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0)))
   Call: (267) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0)\=@='$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _135118)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _296704))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _296704))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _296704))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _296704))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _296704)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _296704)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _302290))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _302290))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _302290)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _302290)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _302290)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0)))
   Call: (267) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0)\=@='$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _296704)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _129506))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _129506))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _129506))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _129506))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _129506)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _129506)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _324610))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _324610))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _324610)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _324610)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _324610)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0)))
   Call: (267) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0)\=@='$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _129506)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0)))
   Call: (261) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0)\=@='$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _353388, [], _353390)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _353388, [], _353390)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _353388, [], _353390)
   Call: (258) [system] atom('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _353388, [], _353390)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _353388, [], _353390)
   Call: (258) [system] compound('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), _362704, _362706)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0])
^  Call: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0], _364590, [], _353390)
^  Unify: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0], [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0], [], [])
   Call: (259) [system] var([";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0])
^  Redo: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0], _364590, [], _353390)
^  Unify: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0], [_368326|_368328], [], _353390)
^  Call: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _368326, [], _369266)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", ";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", [], [])
   Call: (260) [system] var(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));")
^  Redo: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _368326, [], _369266)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _368326, [], _369266)
   Call: (260) [system] atom(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));")
^  Redo: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _368326, [], _369266)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _368326, [], _369266)
   Call: (260) [system] compound(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));")
^  Redo: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", _368326, [], _369266)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", ";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", [], [])
^  Exit: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", ";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", [], [])
^  Call: (259) [user] subst_vars([1165, 0], _368328, [], _353390)
^  Unify: (259) [user] subst_vars([1165, 0], [1165, 0], [], [])
   Call: (260) [system] var([1165, 0])
^  Redo: (259) [user] subst_vars([1165, 0], _368328, [], _353390)
^  Unify: (259) [user] subst_vars([1165, 0], [_384198|_384200], [], _353390)
^  Call: (260) [user] subst_vars(1165, _384198, [], _385138)
^  Unify: (260) [user] subst_vars(1165, 1165, [], [])
   Call: (261) [system] var(1165)
^  Redo: (260) [user] subst_vars(1165, _384198, [], _385138)
^  Unify: (260) [user] subst_vars(1165, _384198, [], _385138)
   Call: (261) [system] atom(1165)
^  Redo: (260) [user] subst_vars(1165, _384198, [], _385138)
^  Unify: (260) [user] subst_vars(1165, _384198, [], _385138)
   Call: (261) [system] compound(1165)
^  Redo: (260) [user] subst_vars(1165, _384198, [], _385138)
^  Unify: (260) [user] subst_vars(1165, 1165, [], [])
^  Exit: (260) [user] subst_vars(1165, 1165, [], [])
^  Call: (260) [user] subst_vars([0], _384200, [], _353390)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _384200, [], _353390)
^  Unify: (260) [user] subst_vars([0], [_400070|_400072], [], _353390)
^  Call: (261) [user] subst_vars(0, _400070, [], _401010)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _400070, [], _401010)
^  Unify: (261) [user] subst_vars(0, _400070, [], _401010)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _400070, [], _401010)
^  Unify: (261) [user] subst_vars(0, _400070, [], _401010)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _400070, [], _401010)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _400072, [], _353390)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _400072, [], _353390)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1165, 0], [1165, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0], [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0], [], [])
   Call: (258) [system] compound_name_arguments(_353388, '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), [], [])
   Call: (257) [system] _423428=metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\") \"IncorrectNumberOfArguments\")]]));", 1165, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1166, 0, 42663, '$COMMENT'(";;", 1166, 0), '$stream_position'(42663, 1166, 0, 42663)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1166, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1166, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1166, 0), _476144))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1166, 0), _476144))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1166, 0), _476144)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1166, 0), _476144)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1166, 0), _476144)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1166, 0), _476144)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1166, 0), _481756))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1166, 0), _481756))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1166, 0), _481756))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1166, 0), _481756))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1166, 0), _481756)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1166, 0), _481756)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1166, 0), _487342))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1166, 0), _487342))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1166, 0), _487342)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1166, 0), _487342)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1166, 0), _487342)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1166, 0), _487342)
   Call: (270) [system] var('$COMMENT'(";;", 1166, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1166, 0), _487342)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1166, 0), '$VAR'(_494802))
   Call: (270) [system] atom('$COMMENT'(";;", 1166, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1166, 0), _487342)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1166, 0), _487342)
   Call: (270) [system] '$COMMENT'(";;", 1166, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1166, 0), _487342)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1166, 0), _487342)
   Call: (270) [system] '$COMMENT'(";;", 1166, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1166, 0), _487342)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1166, 0), _487342)
   Call: (270) [system] '$COMMENT'(";;", 1166, 0)==[_504082, _504088]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1166, 0), _487342)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1166, 0), _487342)
   Call: (270) [system] is_list('$COMMENT'(";;", 1166, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1166, 0), _487342)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1166, 0), _487342)
   Call: (270) [system] string('$COMMENT'(";;", 1166, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1166, 0), _487342)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1166, 0), _487342)
   Call: (270) [system] compound('$COMMENT'(";;", 1166, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1166, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1166, 0), _514284, _514286)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1166, 0), '$COMMENT', [";;", 1166, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1166, 0], _518026)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1166, 0], _518026)
   Call: (271) [apply] apply:maplist_([";;", 1166, 0], _518026, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1166, 0], [_520844|_520846], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _520844)
^  Unify: (272) [user] mfix_vars1(";;", _520844)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_7580))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] ";;"==[_16860, _16866]
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] ";;"=_6022
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1166, 0], _6024, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1166, 0], [_40932|_40934], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1166, _40932)
^  Unify: (273) [user] mfix_vars1(1166, _40932)
   Call: (274) [system] var(1166)
^  Redo: (273) [user] mfix_vars1(1166, _40932)
^  Unify: (273) [user] mfix_vars1(1166, '$VAR'(_45578))
   Call: (274) [system] atom(1166)
^  Redo: (273) [user] mfix_vars1(1166, _40932)
^  Unify: (273) [user] mfix_vars1(1166, _40932)
   Call: (274) [system] 1166==true
^  Redo: (273) [user] mfix_vars1(1166, _40932)
^  Unify: (273) [user] mfix_vars1(1166, _40932)
   Call: (274) [system] 1166==false
^  Redo: (273) [user] mfix_vars1(1166, _40932)
^  Unify: (273) [user] mfix_vars1(1166, _40932)
   Call: (274) [system] 1166==[_54858, _54864]
^  Redo: (273) [user] mfix_vars1(1166, _40932)
^  Unify: (273) [user] mfix_vars1(1166, _40932)
   Call: (274) [system] is_list(1166)
^  Redo: (273) [user] mfix_vars1(1166, _40932)
^  Unify: (273) [user] mfix_vars1(1166, _40932)
   Call: (274) [system] string(1166)
^  Redo: (273) [user] mfix_vars1(1166, _40932)
^  Unify: (273) [user] mfix_vars1(1166, _40932)
   Call: (274) [system] compound(1166)
^  Redo: (273) [user] mfix_vars1(1166, _40932)
^  Unify: (273) [user] mfix_vars1(1166, _40932)
^  Call: (274) [user] symbol(1166)
^  Unify: (274) [user] symbol(1166)
   Call: (275) [system] atom(1166)
   Fail: (275) [system] atom(1166)
^  Fail: (274) [user] symbol(1166)
^  Redo: (273) [user] mfix_vars1(1166, _40932)
   Call: (274) [system] 1166=_40932
   Exit: (274) [system] 1166=1166
^  Exit: (273) [user] mfix_vars1(1166, 1166)
   Call: (273) [apply] apply:maplist_([0], _40934, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_75258|_75260], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _75258)
^  Unify: (274) [user] mfix_vars1(0, _75258)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _75258)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_79904))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _75258)
^  Unify: (274) [user] mfix_vars1(0, _75258)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _75258)
^  Unify: (274) [user] mfix_vars1(0, _75258)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _75258)
^  Unify: (274) [user] mfix_vars1(0, _75258)
   Call: (275) [system] 0==[_89184, _89190]
^  Redo: (274) [user] mfix_vars1(0, _75258)
^  Unify: (274) [user] mfix_vars1(0, _75258)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _75258)
^  Unify: (274) [user] mfix_vars1(0, _75258)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _75258)
^  Unify: (274) [user] mfix_vars1(0, _75258)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _75258)
^  Unify: (274) [user] mfix_vars1(0, _75258)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _75258)
   Call: (275) [system] 0=_75258
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _75260, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1166, 0], [1166, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1166, 0], [";;", 1166, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1166, 0], [";;", 1166, 0])
   Call: (270) [system] compound_name_arguments(_5976, '$COMMENT', [";;", 1166, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1166, 0), '$COMMENT', [";;", 1166, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1166, 0)\=@='$COMMENT'(";;", 1166, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1166, 0), _5962)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1166, 0), _125432))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1166, 0), _125432))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1166, 0), _125432))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1166, 0), _125432))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1166, 0), _125432)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1166, 0), _125432)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1166, 0), _131018))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1166, 0), _131018))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1166, 0), _131018)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1166, 0), _131018)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1166, 0), _131018)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1166, 0)\=@='$COMMENT'(";;", 1166, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1166, 0), _125432)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1166, 0), _5942))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1166, 0), _5942))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1166, 0), _5942))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1166, 0), _5942))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1166, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1166, 0), _5942)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1166, 0), _153338))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1166, 0), _153338))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1166, 0), _153338)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1166, 0), _153338)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1166, 0), _153338)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1166, 0)\=@='$COMMENT'(";;", 1166, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1166, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1166, 0)\=@='$COMMENT'(";;", 1166, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1166, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1166, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1166, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1166, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1166, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1166, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1166, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1166, 0), _182116, [], _182118)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1166, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1166, 0), _182116, [], _182118)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1166, 0), _182116, [], _182118)
   Call: (258) [system] atom('$COMMENT'(";;", 1166, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1166, 0), _182116, [], _182118)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1166, 0), _182116, [], _182118)
   Call: (258) [system] compound('$COMMENT'(";;", 1166, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1166, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1166, 0), _191432, _191434)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1166, 0), '$COMMENT', [";;", 1166, 0])
^  Call: (258) [user] subst_vars([";;", 1166, 0], _193318, [], _182118)
^  Unify: (258) [user] subst_vars([";;", 1166, 0], [";;", 1166, 0], [], [])
   Call: (259) [system] var([";;", 1166, 0])
^  Redo: (258) [user] subst_vars([";;", 1166, 0], _193318, [], _182118)
^  Unify: (258) [user] subst_vars([";;", 1166, 0], [_197054|_197056], [], _182118)
^  Call: (259) [user] subst_vars(";;", _197054, [], _197994)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _197054, [], _197994)
^  Unify: (259) [user] subst_vars(";;", _197054, [], _197994)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _197054, [], _197994)
^  Unify: (259) [user] subst_vars(";;", _197054, [], _197994)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _197054, [], _197994)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1166, 0], _197056, [], _182118)
^  Unify: (259) [user] subst_vars([1166, 0], [1166, 0], [], [])
   Call: (260) [system] var([1166, 0])
^  Redo: (259) [user] subst_vars([1166, 0], _197056, [], _182118)
^  Unify: (259) [user] subst_vars([1166, 0], [_212926|_212928], [], _182118)
^  Call: (260) [user] subst_vars(1166, _212926, [], _213866)
^  Unify: (260) [user] subst_vars(1166, 1166, [], [])
   Call: (261) [system] var(1166)
^  Redo: (260) [user] subst_vars(1166, _212926, [], _213866)
^  Unify: (260) [user] subst_vars(1166, _212926, [], _213866)
   Call: (261) [system] atom(1166)
^  Redo: (260) [user] subst_vars(1166, _212926, [], _213866)
^  Unify: (260) [user] subst_vars(1166, _212926, [], _213866)
   Call: (261) [system] compound(1166)
^  Redo: (260) [user] subst_vars(1166, _212926, [], _213866)
^  Unify: (260) [user] subst_vars(1166, 1166, [], [])
^  Exit: (260) [user] subst_vars(1166, 1166, [], [])
^  Call: (260) [user] subst_vars([0], _212928, [], _182118)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _212928, [], _182118)
^  Unify: (260) [user] subst_vars([0], [_228798|_228800], [], _182118)
^  Call: (261) [user] subst_vars(0, _228798, [], _229738)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _228798, [], _229738)
^  Unify: (261) [user] subst_vars(0, _228798, [], _229738)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _228798, [], _229738)
^  Unify: (261) [user] subst_vars(0, _228798, [], _229738)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _228798, [], _229738)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _228800, [], _182118)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _228800, [], _182118)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1166, 0], [1166, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1166, 0], [";;", 1166, 0], [], [])
   Call: (258) [system] compound_name_arguments(_182116, '$COMMENT', [";;", 1166, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1166, 0), '$COMMENT', [";;", 1166, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1166, 0), '$COMMENT'(";;", 1166, 0), [], [])
   Call: (257) [system] _252156=metta_file_buffer(+, '$COMMENT'(";;", 1166, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1166, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1166, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1166, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1166, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1166, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1166, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1166, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1166, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1167, 0, 42666, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$stream_position'(42666, 1167, 0, 42666)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _304888))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _304888))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _304888)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _304888)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _304888)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _304888)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _310500))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _310500))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _310500))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _310500))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _310500)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _310500)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _316086))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _316086))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _316086)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _316086)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _316086)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _316086)
   Call: (270) [system] var('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _316086)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$VAR'(_323546))
   Call: (270) [system] atom('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _316086)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _316086)
   Call: (270) [system] '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _316086)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _316086)
   Call: (270) [system] '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _316086)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _316086)
   Call: (270) [system] '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0)==[_332826, _332832]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _316086)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _316086)
   Call: (270) [system] is_list('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _316086)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _316086)
   Call: (270) [system] string('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _316086)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _316086)
   Call: (270) [system] compound('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _343028, _343030)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT', [";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0], _346770)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0], _346770)
   Call: (271) [apply] apply:maplist_([";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0], _346770, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0], [_349588|_349590], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _349588)
^  Unify: (272) [user] mfix_vars1(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _349588)
   Call: (273) [system] var(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";")
^  Redo: (272) [user] mfix_vars1(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _349588)
^  Unify: (272) [user] mfix_vars1(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", '$VAR'(_354234))
   Call: (273) [system] atom(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";")
^  Redo: (272) [user] mfix_vars1(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _349588)
^  Unify: (272) [user] mfix_vars1(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _349588)
   Call: (273) [system] ";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";"==true
^  Redo: (272) [user] mfix_vars1(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _349588)
^  Unify: (272) [user] mfix_vars1(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _349588)
   Call: (273) [system] ";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";"==false
^  Redo: (272) [user] mfix_vars1(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _349588)
^  Unify: (272) [user] mfix_vars1(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _349588)
   Call: (273) [system] ";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";"==[_363514, _363520]
^  Redo: (272) [user] mfix_vars1(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _349588)
^  Unify: (272) [user] mfix_vars1(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _349588)
   Call: (273) [system] is_list(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";")
^  Redo: (272) [user] mfix_vars1(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _349588)
^  Unify: (272) [user] mfix_vars1(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _349588)
   Call: (273) [system] string(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";")
   Exit: (273) [system] string(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _349588)
^  Unify: (272) [user] mfix_vars1(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _349588)
   Call: (273) [system] compound(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";")
^  Redo: (272) [user] mfix_vars1(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _349588)
^  Unify: (272) [user] mfix_vars1(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _349588)
^  Call: (273) [user] symbol(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";")
^  Unify: (273) [user] symbol(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";")
   Call: (274) [system] atom(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";")
   Fail: (274) [system] atom(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";")
^  Fail: (273) [user] symbol(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";")
^  Redo: (272) [user] mfix_vars1(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _349588)
   Call: (273) [system] ";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";"=_349588
   Exit: (273) [system] ";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";"=";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";"
^  Exit: (272) [user] mfix_vars1(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", ";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";")
   Call: (272) [apply] apply:maplist_([1167, 0], _349590, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1167, 0], [_387586|_387588], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1167, _387586)
^  Unify: (273) [user] mfix_vars1(1167, _387586)
   Call: (274) [system] var(1167)
^  Redo: (273) [user] mfix_vars1(1167, _387586)
^  Unify: (273) [user] mfix_vars1(1167, '$VAR'(_392232))
   Call: (274) [system] atom(1167)
^  Redo: (273) [user] mfix_vars1(1167, _387586)
^  Unify: (273) [user] mfix_vars1(1167, _387586)
   Call: (274) [system] 1167==true
^  Redo: (273) [user] mfix_vars1(1167, _387586)
^  Unify: (273) [user] mfix_vars1(1167, _387586)
   Call: (274) [system] 1167==false
^  Redo: (273) [user] mfix_vars1(1167, _387586)
^  Unify: (273) [user] mfix_vars1(1167, _387586)
   Call: (274) [system] 1167==[_401512, _401518]
^  Redo: (273) [user] mfix_vars1(1167, _387586)
^  Unify: (273) [user] mfix_vars1(1167, _387586)
   Call: (274) [system] is_list(1167)
^  Redo: (273) [user] mfix_vars1(1167, _387586)
^  Unify: (273) [user] mfix_vars1(1167, _387586)
   Call: (274) [system] string(1167)
^  Redo: (273) [user] mfix_vars1(1167, _387586)
^  Unify: (273) [user] mfix_vars1(1167, _387586)
   Call: (274) [system] compound(1167)
^  Redo: (273) [user] mfix_vars1(1167, _387586)
^  Unify: (273) [user] mfix_vars1(1167, _387586)
^  Call: (274) [user] symbol(1167)
^  Unify: (274) [user] symbol(1167)
   Call: (275) [system] atom(1167)
   Fail: (275) [system] atom(1167)
^  Fail: (274) [user] symbol(1167)
^  Redo: (273) [user] mfix_vars1(1167, _387586)
   Call: (274) [system] 1167=_387586
   Exit: (274) [system] 1167=1167
^  Exit: (273) [user] mfix_vars1(1167, 1167)
   Call: (273) [apply] apply:maplist_([0], _387588, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_421912|_421914], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _421912)
^  Unify: (274) [user] mfix_vars1(0, _421912)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _421912)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_426558))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _421912)
^  Unify: (274) [user] mfix_vars1(0, _421912)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _421912)
^  Unify: (274) [user] mfix_vars1(0, _421912)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _421912)
^  Unify: (274) [user] mfix_vars1(0, _421912)
   Call: (275) [system] 0==[_435838, _435844]
^  Redo: (274) [user] mfix_vars1(0, _421912)
^  Unify: (274) [user] mfix_vars1(0, _421912)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _421912)
^  Unify: (274) [user] mfix_vars1(0, _421912)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _421912)
^  Unify: (274) [user] mfix_vars1(0, _421912)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _421912)
^  Unify: (274) [user] mfix_vars1(0, _421912)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _421912)
   Call: (275) [system] 0=_421912
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _421914, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1167, 0], [1167, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0], [";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0], [";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0])
   Call: (270) [system] compound_name_arguments(_316086, '$COMMENT', [";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT', [";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0)))
   Call: (267) [system] '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0)\=@='$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _310500)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _472086))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _472086))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _472086))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _472086))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _472086)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _472086)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _477672))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _477672))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _477672)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _477672)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _477672)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0)))
   Call: (267) [system] '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0)\=@='$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _472086)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _304888))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _304888))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _304888))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _304888))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _304888)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _304888)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _499992))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _499992))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _499992)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _499992)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _499992)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0)))
   Call: (267) [system] '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0)\=@='$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _304888)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0)))
   Call: (261) [system] '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0)\=@='$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _10550, [], _10552)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _10550, [], _10552)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _10550, [], _10552)
   Call: (258) [system] atom('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _10550, [], _10552)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _10550, [], _10552)
   Call: (258) [system] compound('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), _19866, _19868)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT', [";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0])
^  Call: (258) [user] subst_vars([";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0], _21752, [], _10552)
^  Unify: (258) [user] subst_vars([";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0], [";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0], [], [])
   Call: (259) [system] var([";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0])
^  Redo: (258) [user] subst_vars([";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0], _21752, [], _10552)
^  Unify: (258) [user] subst_vars([";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0], [_25488|_25490], [], _10552)
^  Call: (259) [user] subst_vars(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _25488, [], _26428)
^  Unify: (259) [user] subst_vars(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", ";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", [], [])
   Call: (260) [system] var(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";")
^  Redo: (259) [user] subst_vars(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _25488, [], _26428)
^  Unify: (259) [user] subst_vars(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _25488, [], _26428)
   Call: (260) [system] atom(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";")
^  Redo: (259) [user] subst_vars(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _25488, [], _26428)
^  Unify: (259) [user] subst_vars(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _25488, [], _26428)
   Call: (260) [system] compound(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";")
^  Redo: (259) [user] subst_vars(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", _25488, [], _26428)
^  Unify: (259) [user] subst_vars(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", ";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", [], [])
^  Exit: (259) [user] subst_vars(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", ";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", [], [])
^  Call: (259) [user] subst_vars([1167, 0], _25490, [], _10552)
^  Unify: (259) [user] subst_vars([1167, 0], [1167, 0], [], [])
   Call: (260) [system] var([1167, 0])
^  Redo: (259) [user] subst_vars([1167, 0], _25490, [], _10552)
^  Unify: (259) [user] subst_vars([1167, 0], [_41360|_41362], [], _10552)
^  Call: (260) [user] subst_vars(1167, _41360, [], _42300)
^  Unify: (260) [user] subst_vars(1167, 1167, [], [])
   Call: (261) [system] var(1167)
^  Redo: (260) [user] subst_vars(1167, _41360, [], _42300)
^  Unify: (260) [user] subst_vars(1167, _41360, [], _42300)
   Call: (261) [system] atom(1167)
^  Redo: (260) [user] subst_vars(1167, _41360, [], _42300)
^  Unify: (260) [user] subst_vars(1167, _41360, [], _42300)
   Call: (261) [system] compound(1167)
^  Redo: (260) [user] subst_vars(1167, _41360, [], _42300)
^  Unify: (260) [user] subst_vars(1167, 1167, [], [])
^  Exit: (260) [user] subst_vars(1167, 1167, [], [])
^  Call: (260) [user] subst_vars([0], _41362, [], _10552)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _41362, [], _10552)
^  Unify: (260) [user] subst_vars([0], [_57232|_57234], [], _10552)
^  Call: (261) [user] subst_vars(0, _57232, [], _58172)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _57232, [], _58172)
^  Unify: (261) [user] subst_vars(0, _57232, [], _58172)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _57232, [], _58172)
^  Unify: (261) [user] subst_vars(0, _57232, [], _58172)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _57232, [], _58172)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _57234, [], _10552)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _57234, [], _10552)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1167, 0], [1167, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0], [";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0], [], [])
   Call: (258) [system] compound_name_arguments(_10550, '$COMMENT', [";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT', [";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), [], [])
   Call: (257) [system] _80590=metta_file_buffer(+, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program3 = \"!(metta (foo a b c) %Undefined% &self)\";", 1167, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1168, 0, 42730, '$COMMENT'(";;", 1168, 0), '$stream_position'(42730, 1168, 0, 42730)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1168, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1168, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1168, 0), _133306))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1168, 0), _133306))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1168, 0), _133306)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1168, 0), _133306)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1168, 0), _133306)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1168, 0), _133306)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1168, 0), _138918))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1168, 0), _138918))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1168, 0), _138918))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1168, 0), _138918))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1168, 0), _138918)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1168, 0), _138918)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1168, 0), _144504))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1168, 0), _144504))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1168, 0), _144504)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1168, 0), _144504)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1168, 0), _144504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1168, 0), _144504)
   Call: (270) [system] var('$COMMENT'(";;", 1168, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1168, 0), _144504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1168, 0), '$VAR'(_151964))
   Call: (270) [system] atom('$COMMENT'(";;", 1168, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1168, 0), _144504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1168, 0), _144504)
   Call: (270) [system] '$COMMENT'(";;", 1168, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1168, 0), _144504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1168, 0), _144504)
   Call: (270) [system] '$COMMENT'(";;", 1168, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1168, 0), _144504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1168, 0), _144504)
   Call: (270) [system] '$COMMENT'(";;", 1168, 0)==[_161244, _161250]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1168, 0), _144504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1168, 0), _144504)
   Call: (270) [system] is_list('$COMMENT'(";;", 1168, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1168, 0), _144504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1168, 0), _144504)
   Call: (270) [system] string('$COMMENT'(";;", 1168, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1168, 0), _144504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1168, 0), _144504)
   Call: (270) [system] compound('$COMMENT'(";;", 1168, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1168, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1168, 0), _171446, _171448)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1168, 0), '$COMMENT', [";;", 1168, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1168, 0], _175188)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1168, 0], _175188)
   Call: (271) [apply] apply:maplist_([";;", 1168, 0], _175188, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1168, 0], [_178006|_178008], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _178006)
^  Unify: (272) [user] mfix_vars1(";;", _178006)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _178006)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_182652))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _178006)
^  Unify: (272) [user] mfix_vars1(";;", _178006)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _178006)
^  Unify: (272) [user] mfix_vars1(";;", _178006)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _178006)
^  Unify: (272) [user] mfix_vars1(";;", _178006)
   Call: (273) [system] ";;"==[_191932, _191938]
^  Redo: (272) [user] mfix_vars1(";;", _178006)
^  Unify: (272) [user] mfix_vars1(";;", _178006)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _178006)
^  Unify: (272) [user] mfix_vars1(";;", _178006)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _178006)
^  Unify: (272) [user] mfix_vars1(";;", _178006)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _178006)
^  Unify: (272) [user] mfix_vars1(";;", _178006)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _178006)
   Call: (273) [system] ";;"=_178006
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1168, 0], _178008, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1168, 0], [_216004|_216006], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1168, _216004)
^  Unify: (273) [user] mfix_vars1(1168, _216004)
   Call: (274) [system] var(1168)
^  Redo: (273) [user] mfix_vars1(1168, _216004)
^  Unify: (273) [user] mfix_vars1(1168, '$VAR'(_220650))
   Call: (274) [system] atom(1168)
^  Redo: (273) [user] mfix_vars1(1168, _216004)
^  Unify: (273) [user] mfix_vars1(1168, _216004)
   Call: (274) [system] 1168==true
^  Redo: (273) [user] mfix_vars1(1168, _216004)
^  Unify: (273) [user] mfix_vars1(1168, _216004)
   Call: (274) [system] 1168==false
^  Redo: (273) [user] mfix_vars1(1168, _216004)
^  Unify: (273) [user] mfix_vars1(1168, _216004)
   Call: (274) [system] 1168==[_229930, _229936]
^  Redo: (273) [user] mfix_vars1(1168, _216004)
^  Unify: (273) [user] mfix_vars1(1168, _216004)
   Call: (274) [system] is_list(1168)
^  Redo: (273) [user] mfix_vars1(1168, _216004)
^  Unify: (273) [user] mfix_vars1(1168, _216004)
   Call: (274) [system] string(1168)
^  Redo: (273) [user] mfix_vars1(1168, _216004)
^  Unify: (273) [user] mfix_vars1(1168, _216004)
   Call: (274) [system] compound(1168)
^  Redo: (273) [user] mfix_vars1(1168, _216004)
^  Unify: (273) [user] mfix_vars1(1168, _216004)
^  Call: (274) [user] symbol(1168)
^  Unify: (274) [user] symbol(1168)
   Call: (275) [system] atom(1168)
   Fail: (275) [system] atom(1168)
^  Fail: (274) [user] symbol(1168)
^  Redo: (273) [user] mfix_vars1(1168, _216004)
   Call: (274) [system] 1168=_216004
   Exit: (274) [system] 1168=1168
^  Exit: (273) [user] mfix_vars1(1168, 1168)
   Call: (273) [apply] apply:maplist_([0], _216006, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_250330|_250332], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _250330)
^  Unify: (274) [user] mfix_vars1(0, _250330)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _250330)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_254976))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _250330)
^  Unify: (274) [user] mfix_vars1(0, _250330)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _250330)
^  Unify: (274) [user] mfix_vars1(0, _250330)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _250330)
^  Unify: (274) [user] mfix_vars1(0, _250330)
   Call: (275) [system] 0==[_264256, _264262]
^  Redo: (274) [user] mfix_vars1(0, _250330)
^  Unify: (274) [user] mfix_vars1(0, _250330)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _250330)
^  Unify: (274) [user] mfix_vars1(0, _250330)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _250330)
^  Unify: (274) [user] mfix_vars1(0, _250330)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _250330)
^  Unify: (274) [user] mfix_vars1(0, _250330)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _250330)
   Call: (275) [system] 0=_250330
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _250332, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1168, 0], [1168, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1168, 0], [";;", 1168, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1168, 0], [";;", 1168, 0])
   Call: (270) [system] compound_name_arguments(_144504, '$COMMENT', [";;", 1168, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1168, 0), '$COMMENT', [";;", 1168, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1168, 0)\=@='$COMMENT'(";;", 1168, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1168, 0), _138918)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1168, 0), _300504))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1168, 0), _300504))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1168, 0), _300504))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1168, 0), _300504))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1168, 0), _300504)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1168, 0), _300504)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1168, 0), _306090))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1168, 0), _306090))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1168, 0), _306090)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1168, 0), _306090)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1168, 0), _306090)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1168, 0)\=@='$COMMENT'(";;", 1168, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1168, 0), _300504)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1168, 0), _133306))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1168, 0), _133306))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1168, 0), _133306))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1168, 0), _133306))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1168, 0), _133306)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1168, 0), _133306)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1168, 0), _328410))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1168, 0), _328410))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1168, 0), _328410)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1168, 0), _328410)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1168, 0), _328410)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1168, 0)\=@='$COMMENT'(";;", 1168, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1168, 0), _133306)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1168, 0)\=@='$COMMENT'(";;", 1168, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1168, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1168, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1168, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1168, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1168, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1168, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1168, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1168, 0), _357188, [], _357190)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1168, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1168, 0), _357188, [], _357190)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1168, 0), _357188, [], _357190)
   Call: (258) [system] atom('$COMMENT'(";;", 1168, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1168, 0), _357188, [], _357190)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1168, 0), _357188, [], _357190)
   Call: (258) [system] compound('$COMMENT'(";;", 1168, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1168, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1168, 0), _366504, _366506)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1168, 0), '$COMMENT', [";;", 1168, 0])
^  Call: (258) [user] subst_vars([";;", 1168, 0], _368390, [], _357190)
^  Unify: (258) [user] subst_vars([";;", 1168, 0], [";;", 1168, 0], [], [])
   Call: (259) [system] var([";;", 1168, 0])
^  Redo: (258) [user] subst_vars([";;", 1168, 0], _368390, [], _357190)
^  Unify: (258) [user] subst_vars([";;", 1168, 0], [_372126|_372128], [], _357190)
^  Call: (259) [user] subst_vars(";;", _372126, [], _373066)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _372126, [], _373066)
^  Unify: (259) [user] subst_vars(";;", _372126, [], _373066)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _372126, [], _373066)
^  Unify: (259) [user] subst_vars(";;", _372126, [], _373066)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _372126, [], _373066)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1168, 0], _372128, [], _357190)
^  Unify: (259) [user] subst_vars([1168, 0], [1168, 0], [], [])
   Call: (260) [system] var([1168, 0])
^  Redo: (259) [user] subst_vars([1168, 0], _372128, [], _357190)
^  Unify: (259) [user] subst_vars([1168, 0], [_387998|_388000], [], _357190)
^  Call: (260) [user] subst_vars(1168, _387998, [], _388938)
^  Unify: (260) [user] subst_vars(1168, 1168, [], [])
   Call: (261) [system] var(1168)
^  Redo: (260) [user] subst_vars(1168, _387998, [], _388938)
^  Unify: (260) [user] subst_vars(1168, _387998, [], _388938)
   Call: (261) [system] atom(1168)
^  Redo: (260) [user] subst_vars(1168, _387998, [], _388938)
^  Unify: (260) [user] subst_vars(1168, _387998, [], _388938)
   Call: (261) [system] compound(1168)
^  Redo: (260) [user] subst_vars(1168, _387998, [], _388938)
^  Unify: (260) [user] subst_vars(1168, 1168, [], [])
^  Exit: (260) [user] subst_vars(1168, 1168, [], [])
^  Call: (260) [user] subst_vars([0], _388000, [], _357190)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _388000, [], _357190)
^  Unify: (260) [user] subst_vars([0], [_403870|_403872], [], _357190)
^  Call: (261) [user] subst_vars(0, _403870, [], _404810)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _403870, [], _404810)
^  Unify: (261) [user] subst_vars(0, _403870, [], _404810)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _403870, [], _404810)
^  Unify: (261) [user] subst_vars(0, _403870, [], _404810)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _403870, [], _404810)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _403872, [], _357190)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _403872, [], _357190)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1168, 0], [1168, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1168, 0], [";;", 1168, 0], [], [])
   Call: (258) [system] compound_name_arguments(_357188, '$COMMENT', [";;", 1168, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1168, 0), '$COMMENT', [";;", 1168, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1168, 0), '$COMMENT'(";;", 1168, 0), [], [])
   Call: (257) [system] _427228=metta_file_buffer(+, '$COMMENT'(";;", 1168, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1168, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1168, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1168, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1168, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1168, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1168, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1168, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1168, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1169, 0, 42733, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$stream_position'(42733, 1169, 0, 42733)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _479958))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _479958))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _479958)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _479958)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _479958)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _479958)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _485570))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _485570))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _485570))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _485570))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _485570)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _485570)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _491156))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _491156))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _491156)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _491156)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _491156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _491156)
   Call: (270) [system] var('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _491156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$VAR'(_498616))
   Call: (270) [system] atom('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _491156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _491156)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _491156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _491156)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _491156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _491156)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0)==[_507896, _507902]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _491156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _491156)
   Call: (270) [system] is_list('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _491156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _491156)
   Call: (270) [system] string('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _491156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _491156)
   Call: (270) [system] compound('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _518098, _518100)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0], _521840)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0], _521840)
   Call: (271) [apply] apply:maplist_([";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0], _6026, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0], [_6754|_6756], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _6754)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _6754)
   Call: (273) [system] var(";;     assert_eq!(metta.run(SExprParser::new(program3)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _6754)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program3)),", '$VAR'(_11400))
   Call: (273) [system] atom(";;     assert_eq!(metta.run(SExprParser::new(program3)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _6754)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _6754)
   Call: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program3)),"==true
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _6754)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _6754)
   Call: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program3)),"==false
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _6754)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _6754)
   Call: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program3)),"==[_20680, _20686]
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _6754)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _6754)
   Call: (273) [system] is_list(";;     assert_eq!(metta.run(SExprParser::new(program3)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _6754)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _6754)
   Call: (273) [system] string(";;     assert_eq!(metta.run(SExprParser::new(program3)),")
   Exit: (273) [system] string(";;     assert_eq!(metta.run(SExprParser::new(program3)),")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _6754)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _6754)
   Call: (273) [system] compound(";;     assert_eq!(metta.run(SExprParser::new(program3)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _6754)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _6754)
^  Call: (273) [user] symbol(";;     assert_eq!(metta.run(SExprParser::new(program3)),")
^  Unify: (273) [user] symbol(";;     assert_eq!(metta.run(SExprParser::new(program3)),")
   Call: (274) [system] atom(";;     assert_eq!(metta.run(SExprParser::new(program3)),")
   Fail: (274) [system] atom(";;     assert_eq!(metta.run(SExprParser::new(program3)),")
^  Fail: (273) [user] symbol(";;     assert_eq!(metta.run(SExprParser::new(program3)),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _6754)
   Call: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program3)),"=_6754
   Exit: (273) [system] ";;     assert_eq!(metta.run(SExprParser::new(program3)),"=";;     assert_eq!(metta.run(SExprParser::new(program3)),"
^  Exit: (272) [user] mfix_vars1(";;     assert_eq!(metta.run(SExprParser::new(program3)),", ";;     assert_eq!(metta.run(SExprParser::new(program3)),")
   Call: (272) [apply] apply:maplist_([1169, 0], _6756, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1169, 0], [_44752|_44754], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1169, _44752)
^  Unify: (273) [user] mfix_vars1(1169, _44752)
   Call: (274) [system] var(1169)
^  Redo: (273) [user] mfix_vars1(1169, _44752)
^  Unify: (273) [user] mfix_vars1(1169, '$VAR'(_49398))
   Call: (274) [system] atom(1169)
^  Redo: (273) [user] mfix_vars1(1169, _44752)
^  Unify: (273) [user] mfix_vars1(1169, _44752)
   Call: (274) [system] 1169==true
^  Redo: (273) [user] mfix_vars1(1169, _44752)
^  Unify: (273) [user] mfix_vars1(1169, _44752)
   Call: (274) [system] 1169==false
^  Redo: (273) [user] mfix_vars1(1169, _44752)
^  Unify: (273) [user] mfix_vars1(1169, _44752)
   Call: (274) [system] 1169==[_58678, _58684]
^  Redo: (273) [user] mfix_vars1(1169, _44752)
^  Unify: (273) [user] mfix_vars1(1169, _44752)
   Call: (274) [system] is_list(1169)
^  Redo: (273) [user] mfix_vars1(1169, _44752)
^  Unify: (273) [user] mfix_vars1(1169, _44752)
   Call: (274) [system] string(1169)
^  Redo: (273) [user] mfix_vars1(1169, _44752)
^  Unify: (273) [user] mfix_vars1(1169, _44752)
   Call: (274) [system] compound(1169)
^  Redo: (273) [user] mfix_vars1(1169, _44752)
^  Unify: (273) [user] mfix_vars1(1169, _44752)
^  Call: (274) [user] symbol(1169)
^  Unify: (274) [user] symbol(1169)
   Call: (275) [system] atom(1169)
   Fail: (275) [system] atom(1169)
^  Fail: (274) [user] symbol(1169)
^  Redo: (273) [user] mfix_vars1(1169, _44752)
   Call: (274) [system] 1169=_44752
   Exit: (274) [system] 1169=1169
^  Exit: (273) [user] mfix_vars1(1169, 1169)
   Call: (273) [apply] apply:maplist_([0], _44754, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_79078|_79080], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _79078)
^  Unify: (274) [user] mfix_vars1(0, _79078)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _79078)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_83724))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _79078)
^  Unify: (274) [user] mfix_vars1(0, _79078)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _79078)
^  Unify: (274) [user] mfix_vars1(0, _79078)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _79078)
^  Unify: (274) [user] mfix_vars1(0, _79078)
   Call: (275) [system] 0==[_93004, _93010]
^  Redo: (274) [user] mfix_vars1(0, _79078)
^  Unify: (274) [user] mfix_vars1(0, _79078)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _79078)
^  Unify: (274) [user] mfix_vars1(0, _79078)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _79078)
^  Unify: (274) [user] mfix_vars1(0, _79078)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _79078)
^  Unify: (274) [user] mfix_vars1(0, _79078)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _79078)
   Call: (275) [system] 0=_79078
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _79080, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1169, 0], [1169, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0], [";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0], [";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0])
   Call: (270) [system] compound_name_arguments(_5990, '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0)\=@='$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _5976)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _129252))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _129252))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _129252))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _129252))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _129252)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _129252)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _134838))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _134838))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _134838)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _134838)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _134838)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0)\=@='$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _129252)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _5956))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _5956))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _5956))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _5956))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _5956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _5956)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _157158))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _157158))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _157158)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _157158)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _157158)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0)\=@='$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _5956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0)))
   Call: (261) [system] '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0)\=@='$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _185936, [], _185938)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _185936, [], _185938)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _185936, [], _185938)
   Call: (258) [system] atom('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _185936, [], _185938)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _185936, [], _185938)
   Call: (258) [system] compound('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), _195252, _195254)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0])
^  Call: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0], _197138, [], _185938)
^  Unify: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0], [";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0], [], [])
   Call: (259) [system] var([";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0])
^  Redo: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0], _197138, [], _185938)
^  Unify: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0], [_200874|_200876], [], _185938)
^  Call: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _200874, [], _201814)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program3)),", ";;     assert_eq!(metta.run(SExprParser::new(program3)),", [], [])
   Call: (260) [system] var(";;     assert_eq!(metta.run(SExprParser::new(program3)),")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _200874, [], _201814)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _200874, [], _201814)
   Call: (260) [system] atom(";;     assert_eq!(metta.run(SExprParser::new(program3)),")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _200874, [], _201814)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _200874, [], _201814)
   Call: (260) [system] compound(";;     assert_eq!(metta.run(SExprParser::new(program3)),")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program3)),", _200874, [], _201814)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program3)),", ";;     assert_eq!(metta.run(SExprParser::new(program3)),", [], [])
^  Exit: (259) [user] subst_vars(";;     assert_eq!(metta.run(SExprParser::new(program3)),", ";;     assert_eq!(metta.run(SExprParser::new(program3)),", [], [])
^  Call: (259) [user] subst_vars([1169, 0], _200876, [], _185938)
^  Unify: (259) [user] subst_vars([1169, 0], [1169, 0], [], [])
   Call: (260) [system] var([1169, 0])
^  Redo: (259) [user] subst_vars([1169, 0], _200876, [], _185938)
^  Unify: (259) [user] subst_vars([1169, 0], [_216746|_216748], [], _185938)
^  Call: (260) [user] subst_vars(1169, _216746, [], _217686)
^  Unify: (260) [user] subst_vars(1169, 1169, [], [])
   Call: (261) [system] var(1169)
^  Redo: (260) [user] subst_vars(1169, _216746, [], _217686)
^  Unify: (260) [user] subst_vars(1169, _216746, [], _217686)
   Call: (261) [system] atom(1169)
^  Redo: (260) [user] subst_vars(1169, _216746, [], _217686)
^  Unify: (260) [user] subst_vars(1169, _216746, [], _217686)
   Call: (261) [system] compound(1169)
^  Redo: (260) [user] subst_vars(1169, _216746, [], _217686)
^  Unify: (260) [user] subst_vars(1169, 1169, [], [])
^  Exit: (260) [user] subst_vars(1169, 1169, [], [])
^  Call: (260) [user] subst_vars([0], _216748, [], _185938)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _216748, [], _185938)
^  Unify: (260) [user] subst_vars([0], [_232618|_232620], [], _185938)
^  Call: (261) [user] subst_vars(0, _232618, [], _233558)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _232618, [], _233558)
^  Unify: (261) [user] subst_vars(0, _232618, [], _233558)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _232618, [], _233558)
^  Unify: (261) [user] subst_vars(0, _232618, [], _233558)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _232618, [], _233558)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _232620, [], _185938)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _232620, [], _185938)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1169, 0], [1169, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0], [";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0], [], [])
   Call: (258) [system] compound_name_arguments(_185936, '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT', [";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), [], [])
   Call: (257) [system] _255976=metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(metta.run(SExprParser::new(program3)),", 1169, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1170, 0, 42790, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$stream_position'(42790, 1170, 0, 42790)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _308714))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _308714))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _308714)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _308714)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _308714)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _308714)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _314326))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _314326))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _314326))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _314326))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _314326)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _314326)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _319912))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _319912))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _319912)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _319912)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _319912)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _319912)
   Call: (270) [system] var('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _319912)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$VAR'(_327372))
   Call: (270) [system] atom('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _319912)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _319912)
   Call: (270) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _319912)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _319912)
   Call: (270) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _319912)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _319912)
   Call: (270) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0)==[_336652, _336658]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _319912)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _319912)
   Call: (270) [system] is_list('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _319912)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _319912)
   Call: (270) [system] string('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _319912)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _319912)
   Call: (270) [system] compound('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _346854, _346856)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0], _350596)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0], _350596)
   Call: (271) [apply] apply:maplist_([";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0], _350596, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0], [_353414|_353416], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _353414)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _353414)
   Call: (273) [system] var(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _353414)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", '$VAR'(_358060))
   Call: (273) [system] atom(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _353414)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _353414)
   Call: (273) [system] ";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));"==true
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _353414)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _353414)
   Call: (273) [system] ";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));"==false
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _353414)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _353414)
   Call: (273) [system] ";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));"==[_367340, _367346]
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _353414)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _353414)
   Call: (273) [system] is_list(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _353414)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _353414)
   Call: (273) [system] string(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));")
   Exit: (273) [system] string(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _353414)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _353414)
   Call: (273) [system] compound(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _353414)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _353414)
^  Call: (273) [user] symbol(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));")
^  Unify: (273) [user] symbol(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));")
   Call: (274) [system] atom(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));")
   Fail: (274) [system] atom(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));")
^  Fail: (273) [user] symbol(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _353414)
   Call: (273) [system] ";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));"=_353414
   Exit: (273) [system] ";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));"=";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));"
^  Exit: (272) [user] mfix_vars1(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", ";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));")
   Call: (272) [apply] apply:maplist_([1170, 0], _353416, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1170, 0], [_391412|_391414], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1170, _391412)
^  Unify: (273) [user] mfix_vars1(1170, _391412)
   Call: (274) [system] var(1170)
^  Redo: (273) [user] mfix_vars1(1170, _391412)
^  Unify: (273) [user] mfix_vars1(1170, '$VAR'(_396058))
   Call: (274) [system] atom(1170)
^  Redo: (273) [user] mfix_vars1(1170, _391412)
^  Unify: (273) [user] mfix_vars1(1170, _391412)
   Call: (274) [system] 1170==true
^  Redo: (273) [user] mfix_vars1(1170, _391412)
^  Unify: (273) [user] mfix_vars1(1170, _391412)
   Call: (274) [system] 1170==false
^  Redo: (273) [user] mfix_vars1(1170, _391412)
^  Unify: (273) [user] mfix_vars1(1170, _391412)
   Call: (274) [system] 1170==[_405338, _405344]
^  Redo: (273) [user] mfix_vars1(1170, _391412)
^  Unify: (273) [user] mfix_vars1(1170, _391412)
   Call: (274) [system] is_list(1170)
^  Redo: (273) [user] mfix_vars1(1170, _391412)
^  Unify: (273) [user] mfix_vars1(1170, _391412)
   Call: (274) [system] string(1170)
^  Redo: (273) [user] mfix_vars1(1170, _391412)
^  Unify: (273) [user] mfix_vars1(1170, _391412)
   Call: (274) [system] compound(1170)
^  Redo: (273) [user] mfix_vars1(1170, _391412)
^  Unify: (273) [user] mfix_vars1(1170, _391412)
^  Call: (274) [user] symbol(1170)
^  Unify: (274) [user] symbol(1170)
   Call: (275) [system] atom(1170)
   Fail: (275) [system] atom(1170)
^  Fail: (274) [user] symbol(1170)
^  Redo: (273) [user] mfix_vars1(1170, _391412)
   Call: (274) [system] 1170=_391412
   Exit: (274) [system] 1170=1170
^  Exit: (273) [user] mfix_vars1(1170, 1170)
   Call: (273) [apply] apply:maplist_([0], _391414, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_425738|_425740], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _425738)
^  Unify: (274) [user] mfix_vars1(0, _425738)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _425738)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_430384))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _425738)
^  Unify: (274) [user] mfix_vars1(0, _425738)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _425738)
^  Unify: (274) [user] mfix_vars1(0, _425738)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _425738)
^  Unify: (274) [user] mfix_vars1(0, _425738)
   Call: (275) [system] 0==[_439664, _439670]
^  Redo: (274) [user] mfix_vars1(0, _425738)
^  Unify: (274) [user] mfix_vars1(0, _425738)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _425738)
^  Unify: (274) [user] mfix_vars1(0, _425738)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _425738)
^  Unify: (274) [user] mfix_vars1(0, _425738)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _425738)
^  Unify: (274) [user] mfix_vars1(0, _425738)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _425738)
   Call: (275) [system] 0=_425738
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _425740, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1170, 0], [1170, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0], [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0], [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0])
   Call: (270) [system] compound_name_arguments(_319912, '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0)))
   Call: (267) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0)\=@='$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _314326)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _475912))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _475912))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _475912))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _475912))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _475912)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _475912)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _481498))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _481498))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _481498)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _481498)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _481498)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0)))
   Call: (267) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0)\=@='$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _475912)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _308714))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _308714))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _308714))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _308714))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _308714)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _308714)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _503818))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _503818))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _503818)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _503818)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _503818)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0)))
   Call: (267) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0)\=@='$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _308714)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0)))
   Call: (261) [system] '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0)\=@='$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _14638, [], _14640)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _14638, [], _14640)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _14638, [], _14640)
   Call: (258) [system] atom('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _14638, [], _14640)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _14638, [], _14640)
   Call: (258) [system] compound('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), _23954, _23956)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0])
^  Call: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0], _25840, [], _14640)
^  Unify: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0], [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0], [], [])
   Call: (259) [system] var([";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0])
^  Redo: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0], _25840, [], _14640)
^  Unify: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0], [_29576|_29578], [], _14640)
^  Call: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _29576, [], _30516)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", ";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", [], [])
   Call: (260) [system] var(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));")
^  Redo: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _29576, [], _30516)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _29576, [], _30516)
   Call: (260) [system] atom(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));")
^  Redo: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _29576, [], _30516)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _29576, [], _30516)
   Call: (260) [system] compound(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));")
^  Redo: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", _29576, [], _30516)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", ";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", [], [])
^  Exit: (259) [user] subst_vars(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", ";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", [], [])
^  Call: (259) [user] subst_vars([1170, 0], _29578, [], _14640)
^  Unify: (259) [user] subst_vars([1170, 0], [1170, 0], [], [])
   Call: (260) [system] var([1170, 0])
^  Redo: (259) [user] subst_vars([1170, 0], _29578, [], _14640)
^  Unify: (259) [user] subst_vars([1170, 0], [_45448|_45450], [], _14640)
^  Call: (260) [user] subst_vars(1170, _45448, [], _46388)
^  Unify: (260) [user] subst_vars(1170, 1170, [], [])
   Call: (261) [system] var(1170)
^  Redo: (260) [user] subst_vars(1170, _45448, [], _46388)
^  Unify: (260) [user] subst_vars(1170, _45448, [], _46388)
   Call: (261) [system] atom(1170)
^  Redo: (260) [user] subst_vars(1170, _45448, [], _46388)
^  Unify: (260) [user] subst_vars(1170, _45448, [], _46388)
   Call: (261) [system] compound(1170)
^  Redo: (260) [user] subst_vars(1170, _45448, [], _46388)
^  Unify: (260) [user] subst_vars(1170, 1170, [], [])
^  Exit: (260) [user] subst_vars(1170, 1170, [], [])
^  Call: (260) [user] subst_vars([0], _45450, [], _14640)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _45450, [], _14640)
^  Unify: (260) [user] subst_vars([0], [_61320|_61322], [], _14640)
^  Call: (261) [user] subst_vars(0, _61320, [], _62260)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _61320, [], _62260)
^  Unify: (261) [user] subst_vars(0, _61320, [], _62260)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _61320, [], _62260)
^  Unify: (261) [user] subst_vars(0, _61320, [], _62260)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _61320, [], _62260)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _61322, [], _14640)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _61322, [], _14640)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1170, 0], [1170, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0], [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0], [], [])
   Call: (258) [system] compound_name_arguments(_14638, '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT', [";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), [], [])
   Call: (257) [system] _84678=metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![vec![expr!(\"Error\" (\"foo\" \"a\" \"b\" \"c\") \"IncorrectNumberOfArguments\")]]));", 1170, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1171, 0, 42883, '$COMMENT'(";; }", 1171, 0), '$stream_position'(42883, 1171, 0, 42883)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1171, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1171, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; }", 1171, 0), _137394))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1171, 0), _137394))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; }", 1171, 0), _137394)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1171, 0), _137394)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1171, 0), _137394)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1171, 0), _137394)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; }", 1171, 0), _143006))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1171, 0), _143006))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1171, 0), _143006))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1171, 0), _143006))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1171, 0), _143006)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1171, 0), _143006)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; }", 1171, 0), _148592))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1171, 0), _148592))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; }", 1171, 0), _148592)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1171, 0), _148592)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; }", 1171, 0), _148592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1171, 0), _148592)
   Call: (270) [system] var('$COMMENT'(";; }", 1171, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1171, 0), _148592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1171, 0), '$VAR'(_156052))
   Call: (270) [system] atom('$COMMENT'(";; }", 1171, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1171, 0), _148592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1171, 0), _148592)
   Call: (270) [system] '$COMMENT'(";; }", 1171, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1171, 0), _148592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1171, 0), _148592)
   Call: (270) [system] '$COMMENT'(";; }", 1171, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1171, 0), _148592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1171, 0), _148592)
   Call: (270) [system] '$COMMENT'(";; }", 1171, 0)==[_165332, _165338]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1171, 0), _148592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1171, 0), _148592)
   Call: (270) [system] is_list('$COMMENT'(";; }", 1171, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1171, 0), _148592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1171, 0), _148592)
   Call: (270) [system] string('$COMMENT'(";; }", 1171, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1171, 0), _148592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1171, 0), _148592)
   Call: (270) [system] compound('$COMMENT'(";; }", 1171, 0))
   Exit: (270) [system] compound('$COMMENT'(";; }", 1171, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1171, 0), _175534, _175536)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1171, 0), '$COMMENT', [";; }", 1171, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; }", 1171, 0], _179276)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1171, 0], _179276)
   Call: (271) [apply] apply:maplist_([";; }", 1171, 0], _179276, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; }", 1171, 0], [_182094|_182096], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; }", _182094)
^  Unify: (272) [user] mfix_vars1(";; }", _182094)
   Call: (273) [system] var(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _182094)
^  Unify: (272) [user] mfix_vars1(";; }", '$VAR'(_186740))
   Call: (273) [system] atom(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _182094)
^  Unify: (272) [user] mfix_vars1(";; }", _182094)
   Call: (273) [system] ";; }"==true
^  Redo: (272) [user] mfix_vars1(";; }", _182094)
^  Unify: (272) [user] mfix_vars1(";; }", _182094)
   Call: (273) [system] ";; }"==false
^  Redo: (272) [user] mfix_vars1(";; }", _182094)
^  Unify: (272) [user] mfix_vars1(";; }", _182094)
   Call: (273) [system] ";; }"==[_196020, _196026]
^  Redo: (272) [user] mfix_vars1(";; }", _182094)
^  Unify: (272) [user] mfix_vars1(";; }", _182094)
   Call: (273) [system] is_list(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _182094)
^  Unify: (272) [user] mfix_vars1(";; }", _182094)
   Call: (273) [system] string(";; }")
   Exit: (273) [system] string(";; }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; }", _182094)
^  Unify: (272) [user] mfix_vars1(";; }", _182094)
   Call: (273) [system] compound(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _182094)
^  Unify: (272) [user] mfix_vars1(";; }", _182094)
^  Call: (273) [user] symbol(";; }")
^  Unify: (273) [user] symbol(";; }")
   Call: (274) [system] atom(";; }")
   Fail: (274) [system] atom(";; }")
^  Fail: (273) [user] symbol(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _182094)
   Call: (273) [system] ";; }"=_182094
   Exit: (273) [system] ";; }"=";; }"
^  Exit: (272) [user] mfix_vars1(";; }", ";; }")
   Call: (272) [apply] apply:maplist_([1171, 0], _182096, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1171, 0], [_220092|_220094], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1171, _220092)
^  Unify: (273) [user] mfix_vars1(1171, _220092)
   Call: (274) [system] var(1171)
^  Redo: (273) [user] mfix_vars1(1171, _220092)
^  Unify: (273) [user] mfix_vars1(1171, '$VAR'(_224738))
   Call: (274) [system] atom(1171)
^  Redo: (273) [user] mfix_vars1(1171, _220092)
^  Unify: (273) [user] mfix_vars1(1171, _220092)
   Call: (274) [system] 1171==true
^  Redo: (273) [user] mfix_vars1(1171, _220092)
^  Unify: (273) [user] mfix_vars1(1171, _220092)
   Call: (274) [system] 1171==false
^  Redo: (273) [user] mfix_vars1(1171, _220092)
^  Unify: (273) [user] mfix_vars1(1171, _220092)
   Call: (274) [system] 1171==[_234018, _234024]
^  Redo: (273) [user] mfix_vars1(1171, _220092)
^  Unify: (273) [user] mfix_vars1(1171, _220092)
   Call: (274) [system] is_list(1171)
^  Redo: (273) [user] mfix_vars1(1171, _220092)
^  Unify: (273) [user] mfix_vars1(1171, _220092)
   Call: (274) [system] string(1171)
^  Redo: (273) [user] mfix_vars1(1171, _220092)
^  Unify: (273) [user] mfix_vars1(1171, _220092)
   Call: (274) [system] compound(1171)
^  Redo: (273) [user] mfix_vars1(1171, _220092)
^  Unify: (273) [user] mfix_vars1(1171, _220092)
^  Call: (274) [user] symbol(1171)
^  Unify: (274) [user] symbol(1171)
   Call: (275) [system] atom(1171)
   Fail: (275) [system] atom(1171)
^  Fail: (274) [user] symbol(1171)
^  Redo: (273) [user] mfix_vars1(1171, _220092)
   Call: (274) [system] 1171=_220092
   Exit: (274) [system] 1171=1171
^  Exit: (273) [user] mfix_vars1(1171, 1171)
   Call: (273) [apply] apply:maplist_([0], _220094, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_254418|_254420], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _254418)
^  Unify: (274) [user] mfix_vars1(0, _254418)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _254418)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_259064))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _254418)
^  Unify: (274) [user] mfix_vars1(0, _254418)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _254418)
^  Unify: (274) [user] mfix_vars1(0, _254418)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _254418)
^  Unify: (274) [user] mfix_vars1(0, _254418)
   Call: (275) [system] 0==[_268344, _268350]
^  Redo: (274) [user] mfix_vars1(0, _254418)
^  Unify: (274) [user] mfix_vars1(0, _254418)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _254418)
^  Unify: (274) [user] mfix_vars1(0, _254418)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _254418)
^  Unify: (274) [user] mfix_vars1(0, _254418)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _254418)
^  Unify: (274) [user] mfix_vars1(0, _254418)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _254418)
   Call: (275) [system] 0=_254418
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _254420, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1171, 0], [1171, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; }", 1171, 0], [";; }", 1171, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1171, 0], [";; }", 1171, 0])
   Call: (270) [system] compound_name_arguments(_148592, '$COMMENT', [";; }", 1171, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1171, 0), '$COMMENT', [";; }", 1171, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1171, 0)\=@='$COMMENT'(";; }", 1171, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1171, 0), _143006)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; }", 1171, 0), _304592))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1171, 0), _304592))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1171, 0), _304592))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1171, 0), _304592))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1171, 0), _304592)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1171, 0), _304592)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; }", 1171, 0), _310178))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1171, 0), _310178))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; }", 1171, 0), _310178)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1171, 0), _310178)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; }", 1171, 0), _310178)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1171, 0)\=@='$COMMENT'(";; }", 1171, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1171, 0), _304592)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; }", 1171, 0), _137394))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1171, 0), _137394))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1171, 0), _137394))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1171, 0), _137394))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1171, 0), _137394)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1171, 0), _137394)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; }", 1171, 0), _332498))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1171, 0), _332498))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; }", 1171, 0), _332498)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1171, 0), _332498)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; }", 1171, 0), _332498)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1171, 0)\=@='$COMMENT'(";; }", 1171, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1171, 0), _137394)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0)))
   Call: (261) [system] '$COMMENT'(";; }", 1171, 0)\=@='$COMMENT'(";; }", 1171, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1171, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1171, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1171, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1171, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1171, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; }", 1171, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; }", 1171, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; }", 1171, 0), _361276, [], _361278)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; }", 1171, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1171, 0), _361276, [], _361278)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1171, 0), _361276, [], _361278)
   Call: (258) [system] atom('$COMMENT'(";; }", 1171, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1171, 0), _361276, [], _361278)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1171, 0), _361276, [], _361278)
   Call: (258) [system] compound('$COMMENT'(";; }", 1171, 0))
   Exit: (258) [system] compound('$COMMENT'(";; }", 1171, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1171, 0), _370592, _370594)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1171, 0), '$COMMENT', [";; }", 1171, 0])
^  Call: (258) [user] subst_vars([";; }", 1171, 0], _372478, [], _361278)
^  Unify: (258) [user] subst_vars([";; }", 1171, 0], [";; }", 1171, 0], [], [])
   Call: (259) [system] var([";; }", 1171, 0])
^  Redo: (258) [user] subst_vars([";; }", 1171, 0], _372478, [], _361278)
^  Unify: (258) [user] subst_vars([";; }", 1171, 0], [_376214|_376216], [], _361278)
^  Call: (259) [user] subst_vars(";; }", _376214, [], _377154)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
   Call: (260) [system] var(";; }")
^  Redo: (259) [user] subst_vars(";; }", _376214, [], _377154)
^  Unify: (259) [user] subst_vars(";; }", _376214, [], _377154)
   Call: (260) [system] atom(";; }")
^  Redo: (259) [user] subst_vars(";; }", _376214, [], _377154)
^  Unify: (259) [user] subst_vars(";; }", _376214, [], _377154)
   Call: (260) [system] compound(";; }")
^  Redo: (259) [user] subst_vars(";; }", _376214, [], _377154)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Exit: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Call: (259) [user] subst_vars([1171, 0], _376216, [], _361278)
^  Unify: (259) [user] subst_vars([1171, 0], [1171, 0], [], [])
   Call: (260) [system] var([1171, 0])
^  Redo: (259) [user] subst_vars([1171, 0], _376216, [], _361278)
^  Unify: (259) [user] subst_vars([1171, 0], [_392086|_392088], [], _361278)
^  Call: (260) [user] subst_vars(1171, _392086, [], _393026)
^  Unify: (260) [user] subst_vars(1171, 1171, [], [])
   Call: (261) [system] var(1171)
^  Redo: (260) [user] subst_vars(1171, _392086, [], _393026)
^  Unify: (260) [user] subst_vars(1171, _392086, [], _393026)
   Call: (261) [system] atom(1171)
^  Redo: (260) [user] subst_vars(1171, _392086, [], _393026)
^  Unify: (260) [user] subst_vars(1171, _392086, [], _393026)
   Call: (261) [system] compound(1171)
^  Redo: (260) [user] subst_vars(1171, _392086, [], _393026)
^  Unify: (260) [user] subst_vars(1171, 1171, [], [])
^  Exit: (260) [user] subst_vars(1171, 1171, [], [])
^  Call: (260) [user] subst_vars([0], _392088, [], _361278)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _392088, [], _361278)
^  Unify: (260) [user] subst_vars([0], [_407958|_407960], [], _361278)
^  Call: (261) [user] subst_vars(0, _407958, [], _408898)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _407958, [], _408898)
^  Unify: (261) [user] subst_vars(0, _407958, [], _408898)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _407958, [], _408898)
^  Unify: (261) [user] subst_vars(0, _407958, [], _408898)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _407958, [], _408898)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _407960, [], _361278)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _407960, [], _361278)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1171, 0], [1171, 0], [], [])
^  Exit: (258) [user] subst_vars([";; }", 1171, 0], [";; }", 1171, 0], [], [])
   Call: (258) [system] compound_name_arguments(_361276, '$COMMENT', [";; }", 1171, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1171, 0), '$COMMENT', [";; }", 1171, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; }", 1171, 0), '$COMMENT'(";; }", 1171, 0), [], [])
   Call: (257) [system] _431316=metta_file_buffer(+, '$COMMENT'(";; }", 1171, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; }", 1171, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; }", 1171, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1171, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1171, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1171, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1171, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1171, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1171, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1173, 0, 42889, '$COMMENT'(";; Converted:", 1173, 0), '$stream_position'(42889, 1173, 0, 42889)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1173, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1173, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1173, 0), _484034))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1173, 0), _484034))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1173, 0), _484034)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1173, 0), _484034)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1173, 0), _484034)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1173, 0), _484034)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1173, 0), _489646))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1173, 0), _489646))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1173, 0), _489646))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1173, 0), _489646))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1173, 0), _489646)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1173, 0), _489646)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1173, 0), _495232))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1173, 0), _495232))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1173, 0), _495232)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1173, 0), _495232)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1173, 0), _495232)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1173, 0), _495232)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1173, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1173, 0), _495232)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1173, 0), '$VAR'(_502692))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1173, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1173, 0), _495232)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1173, 0), _495232)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1173, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1173, 0), _495232)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1173, 0), _495232)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1173, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1173, 0), _495232)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1173, 0), _495232)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1173, 0)==[_511972, _511978]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1173, 0), _495232)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1173, 0), _495232)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1173, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1173, 0), _495232)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1173, 0), _495232)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1173, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1173, 0), _495232)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1173, 0), _495232)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1173, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1173, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1173, 0), _522174, _522176)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1173, 0), '$COMMENT', [";; Converted:", 1173, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1173, 0], _7828)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1173, 0], _7828)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1173, 0], _7828, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1173, 0], [_10646|_10648], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _10646)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _10646)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _10646)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_15292))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _10646)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _10646)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _10646)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _10646)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _10646)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _10646)
   Call: (273) [system] ";; Converted:"==[_24572, _24578]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _10646)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _10646)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _10646)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _10646)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _10646)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _10646)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _10646)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _10646)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _10646)
   Call: (273) [system] ";; Converted:"=_10646
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1173, 0], _10648, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1173, 0], [_48644|_48646], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1173, _48644)
^  Unify: (273) [user] mfix_vars1(1173, _48644)
   Call: (274) [system] var(1173)
^  Redo: (273) [user] mfix_vars1(1173, _48644)
^  Unify: (273) [user] mfix_vars1(1173, '$VAR'(_53290))
   Call: (274) [system] atom(1173)
^  Redo: (273) [user] mfix_vars1(1173, _48644)
^  Unify: (273) [user] mfix_vars1(1173, _48644)
   Call: (274) [system] 1173==true
^  Redo: (273) [user] mfix_vars1(1173, _48644)
^  Unify: (273) [user] mfix_vars1(1173, _48644)
   Call: (274) [system] 1173==false
^  Redo: (273) [user] mfix_vars1(1173, _48644)
^  Unify: (273) [user] mfix_vars1(1173, _48644)
   Call: (274) [system] 1173==[_62570, _62576]
^  Redo: (273) [user] mfix_vars1(1173, _48644)
^  Unify: (273) [user] mfix_vars1(1173, _48644)
   Call: (274) [system] is_list(1173)
^  Redo: (273) [user] mfix_vars1(1173, _48644)
^  Unify: (273) [user] mfix_vars1(1173, _48644)
   Call: (274) [system] string(1173)
^  Redo: (273) [user] mfix_vars1(1173, _48644)
^  Unify: (273) [user] mfix_vars1(1173, _48644)
   Call: (274) [system] compound(1173)
^  Redo: (273) [user] mfix_vars1(1173, _48644)
^  Unify: (273) [user] mfix_vars1(1173, _48644)
^  Call: (274) [user] symbol(1173)
^  Unify: (274) [user] symbol(1173)
   Call: (275) [system] atom(1173)
   Fail: (275) [system] atom(1173)
^  Fail: (274) [user] symbol(1173)
^  Redo: (273) [user] mfix_vars1(1173, _48644)
   Call: (274) [system] 1173=_48644
   Exit: (274) [system] 1173=1173
^  Exit: (273) [user] mfix_vars1(1173, 1173)
   Call: (273) [apply] apply:maplist_([0], _48646, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_82970|_82972], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _82970)
^  Unify: (274) [user] mfix_vars1(0, _82970)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _82970)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_87616))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _82970)
^  Unify: (274) [user] mfix_vars1(0, _82970)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _82970)
^  Unify: (274) [user] mfix_vars1(0, _82970)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _82970)
^  Unify: (274) [user] mfix_vars1(0, _82970)
   Call: (275) [system] 0==[_96896, _96902]
^  Redo: (274) [user] mfix_vars1(0, _82970)
^  Unify: (274) [user] mfix_vars1(0, _82970)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _82970)
^  Unify: (274) [user] mfix_vars1(0, _82970)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _82970)
^  Unify: (274) [user] mfix_vars1(0, _82970)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _82970)
^  Unify: (274) [user] mfix_vars1(0, _82970)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _82970)
   Call: (275) [system] 0=_82970
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _82972, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1173, 0], [1173, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1173, 0], [";; Converted:", 1173, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1173, 0], [";; Converted:", 1173, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";; Converted:", 1173, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1173, 0), '$COMMENT', [";; Converted:", 1173, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1173, 0)\=@='$COMMENT'(";; Converted:", 1173, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1173, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1173, 0), _133144))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1173, 0), _133144))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1173, 0), _133144))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1173, 0), _133144))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1173, 0), _133144)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1173, 0), _133144)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1173, 0), _138730))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1173, 0), _138730))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1173, 0), _138730)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1173, 0), _138730)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1173, 0), _138730)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1173, 0)\=@='$COMMENT'(";; Converted:", 1173, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1173, 0), _133144)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1173, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1173, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1173, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1173, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1173, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1173, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1173, 0), _161050))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1173, 0), _161050))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1173, 0), _161050)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1173, 0), _161050)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1173, 0), _161050)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1173, 0)\=@='$COMMENT'(";; Converted:", 1173, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1173, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1173, 0)\=@='$COMMENT'(";; Converted:", 1173, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1173, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1173, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1173, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1173, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1173, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1173, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1173, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1173, 0), _189828, [], _189830)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1173, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1173, 0), _189828, [], _189830)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1173, 0), _189828, [], _189830)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1173, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1173, 0), _189828, [], _189830)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1173, 0), _189828, [], _189830)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1173, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1173, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1173, 0), _199144, _199146)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1173, 0), '$COMMENT', [";; Converted:", 1173, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1173, 0], _201030, [], _189830)
^  Unify: (258) [user] subst_vars([";; Converted:", 1173, 0], [";; Converted:", 1173, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1173, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1173, 0], _201030, [], _189830)
^  Unify: (258) [user] subst_vars([";; Converted:", 1173, 0], [_204766|_204768], [], _189830)
^  Call: (259) [user] subst_vars(";; Converted:", _204766, [], _205706)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _204766, [], _205706)
^  Unify: (259) [user] subst_vars(";; Converted:", _204766, [], _205706)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _204766, [], _205706)
^  Unify: (259) [user] subst_vars(";; Converted:", _204766, [], _205706)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _204766, [], _205706)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1173, 0], _204768, [], _189830)
^  Unify: (259) [user] subst_vars([1173, 0], [1173, 0], [], [])
   Call: (260) [system] var([1173, 0])
^  Redo: (259) [user] subst_vars([1173, 0], _204768, [], _189830)
^  Unify: (259) [user] subst_vars([1173, 0], [_220638|_220640], [], _189830)
^  Call: (260) [user] subst_vars(1173, _220638, [], _221578)
^  Unify: (260) [user] subst_vars(1173, 1173, [], [])
   Call: (261) [system] var(1173)
^  Redo: (260) [user] subst_vars(1173, _220638, [], _221578)
^  Unify: (260) [user] subst_vars(1173, _220638, [], _221578)
   Call: (261) [system] atom(1173)
^  Redo: (260) [user] subst_vars(1173, _220638, [], _221578)
^  Unify: (260) [user] subst_vars(1173, _220638, [], _221578)
   Call: (261) [system] compound(1173)
^  Redo: (260) [user] subst_vars(1173, _220638, [], _221578)
^  Unify: (260) [user] subst_vars(1173, 1173, [], [])
^  Exit: (260) [user] subst_vars(1173, 1173, [], [])
^  Call: (260) [user] subst_vars([0], _220640, [], _189830)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _220640, [], _189830)
^  Unify: (260) [user] subst_vars([0], [_236510|_236512], [], _189830)
^  Call: (261) [user] subst_vars(0, _236510, [], _237450)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _236510, [], _237450)
^  Unify: (261) [user] subst_vars(0, _236510, [], _237450)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _236510, [], _237450)
^  Unify: (261) [user] subst_vars(0, _236510, [], _237450)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _236510, [], _237450)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _236512, [], _189830)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _236512, [], _189830)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1173, 0], [1173, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1173, 0], [";; Converted:", 1173, 0], [], [])
   Call: (258) [system] compound_name_arguments(_189828, '$COMMENT', [";; Converted:", 1173, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1173, 0), '$COMMENT', [";; Converted:", 1173, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1173, 0), '$COMMENT'(";; Converted:", 1173, 0), [], [])
   Call: (257) [system] _259868=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1173, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1173, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1173, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1173, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1173, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1173, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1173, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1173, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1173, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1183, 0, 43210, '$COMMENT'(";; Original:", 1183, 0), '$stream_position'(43210, 1183, 0, 43210)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1183, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1183, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1183, 0), _312586))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1183, 0), _312586))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1183, 0), _312586)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1183, 0), _312586)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1183, 0), _312586)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1183, 0), _312586)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1183, 0), _318198))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1183, 0), _318198))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1183, 0), _318198))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1183, 0), _318198))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1183, 0), _318198)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1183, 0), _318198)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1183, 0), _323784))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1183, 0), _323784))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1183, 0), _323784)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1183, 0), _323784)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1183, 0), _323784)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1183, 0), _323784)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1183, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1183, 0), _323784)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1183, 0), '$VAR'(_331244))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1183, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1183, 0), _323784)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1183, 0), _323784)
   Call: (270) [system] '$COMMENT'(";; Original:", 1183, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1183, 0), _323784)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1183, 0), _323784)
   Call: (270) [system] '$COMMENT'(";; Original:", 1183, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1183, 0), _323784)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1183, 0), _323784)
   Call: (270) [system] '$COMMENT'(";; Original:", 1183, 0)==[_340524, _340530]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1183, 0), _323784)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1183, 0), _323784)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1183, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1183, 0), _323784)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1183, 0), _323784)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1183, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1183, 0), _323784)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1183, 0), _323784)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1183, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1183, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1183, 0), _350726, _350728)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1183, 0), '$COMMENT', [";; Original:", 1183, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1183, 0], _354468)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1183, 0], _354468)
   Call: (271) [apply] apply:maplist_([";; Original:", 1183, 0], _354468, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1183, 0], [_357286|_357288], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _357286)
^  Unify: (272) [user] mfix_vars1(";; Original:", _357286)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _357286)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_361932))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _357286)
^  Unify: (272) [user] mfix_vars1(";; Original:", _357286)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _357286)
^  Unify: (272) [user] mfix_vars1(";; Original:", _357286)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _357286)
^  Unify: (272) [user] mfix_vars1(";; Original:", _357286)
   Call: (273) [system] ";; Original:"==[_371212, _371218]
^  Redo: (272) [user] mfix_vars1(";; Original:", _357286)
^  Unify: (272) [user] mfix_vars1(";; Original:", _357286)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _357286)
^  Unify: (272) [user] mfix_vars1(";; Original:", _357286)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _357286)
^  Unify: (272) [user] mfix_vars1(";; Original:", _357286)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _357286)
^  Unify: (272) [user] mfix_vars1(";; Original:", _357286)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _357286)
   Call: (273) [system] ";; Original:"=_357286
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1183, 0], _357288, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1183, 0], [_395284|_395286], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1183, _395284)
^  Unify: (273) [user] mfix_vars1(1183, _395284)
   Call: (274) [system] var(1183)
^  Redo: (273) [user] mfix_vars1(1183, _395284)
^  Unify: (273) [user] mfix_vars1(1183, '$VAR'(_399930))
   Call: (274) [system] atom(1183)
^  Redo: (273) [user] mfix_vars1(1183, _395284)
^  Unify: (273) [user] mfix_vars1(1183, _395284)
   Call: (274) [system] 1183==true
^  Redo: (273) [user] mfix_vars1(1183, _395284)
^  Unify: (273) [user] mfix_vars1(1183, _395284)
   Call: (274) [system] 1183==false
^  Redo: (273) [user] mfix_vars1(1183, _395284)
^  Unify: (273) [user] mfix_vars1(1183, _395284)
   Call: (274) [system] 1183==[_409210, _409216]
^  Redo: (273) [user] mfix_vars1(1183, _395284)
^  Unify: (273) [user] mfix_vars1(1183, _395284)
   Call: (274) [system] is_list(1183)
^  Redo: (273) [user] mfix_vars1(1183, _395284)
^  Unify: (273) [user] mfix_vars1(1183, _395284)
   Call: (274) [system] string(1183)
^  Redo: (273) [user] mfix_vars1(1183, _395284)
^  Unify: (273) [user] mfix_vars1(1183, _395284)
   Call: (274) [system] compound(1183)
^  Redo: (273) [user] mfix_vars1(1183, _395284)
^  Unify: (273) [user] mfix_vars1(1183, _395284)
^  Call: (274) [user] symbol(1183)
^  Unify: (274) [user] symbol(1183)
   Call: (275) [system] atom(1183)
   Fail: (275) [system] atom(1183)
^  Fail: (274) [user] symbol(1183)
^  Redo: (273) [user] mfix_vars1(1183, _395284)
   Call: (274) [system] 1183=_395284
   Exit: (274) [system] 1183=1183
^  Exit: (273) [user] mfix_vars1(1183, 1183)
   Call: (273) [apply] apply:maplist_([0], _395286, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_429610|_429612], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _429610)
^  Unify: (274) [user] mfix_vars1(0, _429610)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _429610)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_434256))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _429610)
^  Unify: (274) [user] mfix_vars1(0, _429610)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _429610)
^  Unify: (274) [user] mfix_vars1(0, _429610)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _429610)
^  Unify: (274) [user] mfix_vars1(0, _429610)
   Call: (275) [system] 0==[_443536, _443542]
^  Redo: (274) [user] mfix_vars1(0, _429610)
^  Unify: (274) [user] mfix_vars1(0, _429610)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _429610)
^  Unify: (274) [user] mfix_vars1(0, _429610)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _429610)
^  Unify: (274) [user] mfix_vars1(0, _429610)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _429610)
^  Unify: (274) [user] mfix_vars1(0, _429610)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _429610)
   Call: (275) [system] 0=_429610
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _429612, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1183, 0], [1183, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1183, 0], [";; Original:", 1183, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1183, 0], [";; Original:", 1183, 0])
   Call: (270) [system] compound_name_arguments(_323784, '$COMMENT', [";; Original:", 1183, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1183, 0), '$COMMENT', [";; Original:", 1183, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1183, 0)\=@='$COMMENT'(";; Original:", 1183, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1183, 0), _318198)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1183, 0), _479784))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1183, 0), _479784))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1183, 0), _479784))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1183, 0), _479784))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1183, 0), _479784)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1183, 0), _479784)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1183, 0), _485370))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1183, 0), _485370))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1183, 0), _485370)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1183, 0), _485370)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1183, 0), _485370)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1183, 0)\=@='$COMMENT'(";; Original:", 1183, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1183, 0), _479784)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1183, 0), _312586))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1183, 0), _312586))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1183, 0), _312586))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1183, 0), _312586))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1183, 0), _312586)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1183, 0), _312586)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1183, 0), _507690))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1183, 0), _507690))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1183, 0), _507690)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1183, 0), _507690)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1183, 0), _507690)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1183, 0)\=@='$COMMENT'(";; Original:", 1183, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1183, 0), _312586)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1183, 0)\=@='$COMMENT'(";; Original:", 1183, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1183, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1183, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1183, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1183, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1183, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1183, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1183, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1183, 0), _18552, [], _18554)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1183, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1183, 0), _18552, [], _18554)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1183, 0), _18552, [], _18554)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1183, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1183, 0), _18552, [], _18554)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1183, 0), _18552, [], _18554)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1183, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1183, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1183, 0), _27868, _27870)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1183, 0), '$COMMENT', [";; Original:", 1183, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1183, 0], _29754, [], _18554)
^  Unify: (258) [user] subst_vars([";; Original:", 1183, 0], [";; Original:", 1183, 0], [], [])
   Call: (259) [system] var([";; Original:", 1183, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1183, 0], _29754, [], _18554)
^  Unify: (258) [user] subst_vars([";; Original:", 1183, 0], [_33490|_33492], [], _18554)
^  Call: (259) [user] subst_vars(";; Original:", _33490, [], _34430)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _33490, [], _34430)
^  Unify: (259) [user] subst_vars(";; Original:", _33490, [], _34430)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _33490, [], _34430)
^  Unify: (259) [user] subst_vars(";; Original:", _33490, [], _34430)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _33490, [], _34430)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1183, 0], _33492, [], _18554)
^  Unify: (259) [user] subst_vars([1183, 0], [1183, 0], [], [])
   Call: (260) [system] var([1183, 0])
^  Redo: (259) [user] subst_vars([1183, 0], _33492, [], _18554)
^  Unify: (259) [user] subst_vars([1183, 0], [_49362|_49364], [], _18554)
^  Call: (260) [user] subst_vars(1183, _49362, [], _50302)
^  Unify: (260) [user] subst_vars(1183, 1183, [], [])
   Call: (261) [system] var(1183)
^  Redo: (260) [user] subst_vars(1183, _49362, [], _50302)
^  Unify: (260) [user] subst_vars(1183, _49362, [], _50302)
   Call: (261) [system] atom(1183)
^  Redo: (260) [user] subst_vars(1183, _49362, [], _50302)
^  Unify: (260) [user] subst_vars(1183, _49362, [], _50302)
   Call: (261) [system] compound(1183)
^  Redo: (260) [user] subst_vars(1183, _49362, [], _50302)
^  Unify: (260) [user] subst_vars(1183, 1183, [], [])
^  Exit: (260) [user] subst_vars(1183, 1183, [], [])
^  Call: (260) [user] subst_vars([0], _49364, [], _18554)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _49364, [], _18554)
^  Unify: (260) [user] subst_vars([0], [_65234|_65236], [], _18554)
^  Call: (261) [user] subst_vars(0, _65234, [], _66174)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _65234, [], _66174)
^  Unify: (261) [user] subst_vars(0, _65234, [], _66174)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _65234, [], _66174)
^  Unify: (261) [user] subst_vars(0, _65234, [], _66174)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _65234, [], _66174)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _65236, [], _18554)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _65236, [], _18554)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1183, 0], [1183, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1183, 0], [";; Original:", 1183, 0], [], [])
   Call: (258) [system] compound_name_arguments(_18552, '$COMMENT', [";; Original:", 1183, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1183, 0), '$COMMENT', [";; Original:", 1183, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1183, 0), '$COMMENT'(";; Original:", 1183, 0), [], [])
   Call: (257) [system] _88592=metta_file_buffer(+, '$COMMENT'(";; Original:", 1183, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1183, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1183, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1183, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1183, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1183, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1183, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1183, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1183, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1184, 0, 43223, '$COMMENT'(";; #[test]", 1184, 0), '$stream_position'(43223, 1184, 0, 43223)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1184, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1184, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; #[test]", 1184, 0), _141310))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 1184, 0), _141310))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; #[test]", 1184, 0), _141310)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 1184, 0), _141310)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1184, 0), _141310)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1184, 0), _141310)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; #[test]", 1184, 0), _146922))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1184, 0), _146922))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1184, 0), _146922))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1184, 0), _146922))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1184, 0), _146922)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1184, 0), _146922)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; #[test]", 1184, 0), _152508))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 1184, 0), _152508))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; #[test]", 1184, 0), _152508)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 1184, 0), _152508)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1184, 0), _152508)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1184, 0), _152508)
   Call: (270) [system] var('$COMMENT'(";; #[test]", 1184, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1184, 0), _152508)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1184, 0), '$VAR'(_159968))
   Call: (270) [system] atom('$COMMENT'(";; #[test]", 1184, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1184, 0), _152508)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1184, 0), _152508)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1184, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1184, 0), _152508)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1184, 0), _152508)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1184, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1184, 0), _152508)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1184, 0), _152508)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1184, 0)==[_169248, _169254]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1184, 0), _152508)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1184, 0), _152508)
   Call: (270) [system] is_list('$COMMENT'(";; #[test]", 1184, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1184, 0), _152508)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1184, 0), _152508)
   Call: (270) [system] string('$COMMENT'(";; #[test]", 1184, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1184, 0), _152508)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1184, 0), _152508)
   Call: (270) [system] compound('$COMMENT'(";; #[test]", 1184, 0))
   Exit: (270) [system] compound('$COMMENT'(";; #[test]", 1184, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1184, 0), _179450, _179452)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1184, 0), '$COMMENT', [";; #[test]", 1184, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; #[test]", 1184, 0], _183192)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 1184, 0], _183192)
   Call: (271) [apply] apply:maplist_([";; #[test]", 1184, 0], _183192, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; #[test]", 1184, 0], [_186010|_186012], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; #[test]", _186010)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _186010)
   Call: (273) [system] var(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _186010)
^  Unify: (272) [user] mfix_vars1(";; #[test]", '$VAR'(_190656))
   Call: (273) [system] atom(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _186010)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _186010)
   Call: (273) [system] ";; #[test]"==true
^  Redo: (272) [user] mfix_vars1(";; #[test]", _186010)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _186010)
   Call: (273) [system] ";; #[test]"==false
^  Redo: (272) [user] mfix_vars1(";; #[test]", _186010)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _186010)
   Call: (273) [system] ";; #[test]"==[_199936, _199942]
^  Redo: (272) [user] mfix_vars1(";; #[test]", _186010)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _186010)
   Call: (273) [system] is_list(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _186010)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _186010)
   Call: (273) [system] string(";; #[test]")
   Exit: (273) [system] string(";; #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; #[test]", _186010)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _186010)
   Call: (273) [system] compound(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _186010)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _186010)
^  Call: (273) [user] symbol(";; #[test]")
^  Unify: (273) [user] symbol(";; #[test]")
   Call: (274) [system] atom(";; #[test]")
   Fail: (274) [system] atom(";; #[test]")
^  Fail: (273) [user] symbol(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _186010)
   Call: (273) [system] ";; #[test]"=_186010
   Exit: (273) [system] ";; #[test]"=";; #[test]"
^  Exit: (272) [user] mfix_vars1(";; #[test]", ";; #[test]")
   Call: (272) [apply] apply:maplist_([1184, 0], _186012, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1184, 0], [_224008|_224010], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1184, _224008)
^  Unify: (273) [user] mfix_vars1(1184, _224008)
   Call: (274) [system] var(1184)
^  Redo: (273) [user] mfix_vars1(1184, _224008)
^  Unify: (273) [user] mfix_vars1(1184, '$VAR'(_228654))
   Call: (274) [system] atom(1184)
^  Redo: (273) [user] mfix_vars1(1184, _224008)
^  Unify: (273) [user] mfix_vars1(1184, _224008)
   Call: (274) [system] 1184==true
^  Redo: (273) [user] mfix_vars1(1184, _224008)
^  Unify: (273) [user] mfix_vars1(1184, _224008)
   Call: (274) [system] 1184==false
^  Redo: (273) [user] mfix_vars1(1184, _224008)
^  Unify: (273) [user] mfix_vars1(1184, _224008)
   Call: (274) [system] 1184==[_237934, _237940]
^  Redo: (273) [user] mfix_vars1(1184, _224008)
^  Unify: (273) [user] mfix_vars1(1184, _224008)
   Call: (274) [system] is_list(1184)
^  Redo: (273) [user] mfix_vars1(1184, _224008)
^  Unify: (273) [user] mfix_vars1(1184, _224008)
   Call: (274) [system] string(1184)
^  Redo: (273) [user] mfix_vars1(1184, _224008)
^  Unify: (273) [user] mfix_vars1(1184, _224008)
   Call: (274) [system] compound(1184)
^  Redo: (273) [user] mfix_vars1(1184, _224008)
^  Unify: (273) [user] mfix_vars1(1184, _224008)
^  Call: (274) [user] symbol(1184)
^  Unify: (274) [user] symbol(1184)
   Call: (275) [system] atom(1184)
   Fail: (275) [system] atom(1184)
^  Fail: (274) [user] symbol(1184)
^  Redo: (273) [user] mfix_vars1(1184, _224008)
   Call: (274) [system] 1184=_224008
   Exit: (274) [system] 1184=1184
^  Exit: (273) [user] mfix_vars1(1184, 1184)
   Call: (273) [apply] apply:maplist_([0], _224010, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_258334|_258336], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _258334)
^  Unify: (274) [user] mfix_vars1(0, _258334)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _258334)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_262980))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _258334)
^  Unify: (274) [user] mfix_vars1(0, _258334)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _258334)
^  Unify: (274) [user] mfix_vars1(0, _258334)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _258334)
^  Unify: (274) [user] mfix_vars1(0, _258334)
   Call: (275) [system] 0==[_272260, _272266]
^  Redo: (274) [user] mfix_vars1(0, _258334)
^  Unify: (274) [user] mfix_vars1(0, _258334)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _258334)
^  Unify: (274) [user] mfix_vars1(0, _258334)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _258334)
^  Unify: (274) [user] mfix_vars1(0, _258334)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _258334)
^  Unify: (274) [user] mfix_vars1(0, _258334)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _258334)
   Call: (275) [system] 0=_258334
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _258336, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1184, 0], [1184, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; #[test]", 1184, 0], [";; #[test]", 1184, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 1184, 0], [";; #[test]", 1184, 0])
   Call: (270) [system] compound_name_arguments(_152508, '$COMMENT', [";; #[test]", 1184, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1184, 0), '$COMMENT', [";; #[test]", 1184, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1184, 0)\=@='$COMMENT'(";; #[test]", 1184, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1184, 0), _146922)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; #[test]", 1184, 0), _308508))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1184, 0), _308508))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1184, 0), _308508))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1184, 0), _308508))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1184, 0), _308508)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1184, 0), _308508)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; #[test]", 1184, 0), _314094))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 1184, 0), _314094))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; #[test]", 1184, 0), _314094)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 1184, 0), _314094)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1184, 0), _314094)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1184, 0)\=@='$COMMENT'(";; #[test]", 1184, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1184, 0), _308508)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; #[test]", 1184, 0), _141310))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1184, 0), _141310))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1184, 0), _141310))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1184, 0), _141310))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1184, 0), _141310)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1184, 0), _141310)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; #[test]", 1184, 0), _336414))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 1184, 0), _336414))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; #[test]", 1184, 0), _336414)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 1184, 0), _336414)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1184, 0), _336414)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1184, 0)\=@='$COMMENT'(";; #[test]", 1184, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1184, 0), _141310)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0)))
   Call: (261) [system] '$COMMENT'(";; #[test]", 1184, 0)\=@='$COMMENT'(";; #[test]", 1184, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1184, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1184, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1184, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1184, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1184, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1184, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1184, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1184, 0), _365192, [], _365194)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; #[test]", 1184, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1184, 0), _365192, [], _365194)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1184, 0), _365192, [], _365194)
   Call: (258) [system] atom('$COMMENT'(";; #[test]", 1184, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1184, 0), _365192, [], _365194)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1184, 0), _365192, [], _365194)
   Call: (258) [system] compound('$COMMENT'(";; #[test]", 1184, 0))
   Exit: (258) [system] compound('$COMMENT'(";; #[test]", 1184, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1184, 0), _374508, _374510)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1184, 0), '$COMMENT', [";; #[test]", 1184, 0])
^  Call: (258) [user] subst_vars([";; #[test]", 1184, 0], _376394, [], _365194)
^  Unify: (258) [user] subst_vars([";; #[test]", 1184, 0], [";; #[test]", 1184, 0], [], [])
   Call: (259) [system] var([";; #[test]", 1184, 0])
^  Redo: (258) [user] subst_vars([";; #[test]", 1184, 0], _376394, [], _365194)
^  Unify: (258) [user] subst_vars([";; #[test]", 1184, 0], [_380130|_380132], [], _365194)
^  Call: (259) [user] subst_vars(";; #[test]", _380130, [], _381070)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
   Call: (260) [system] var(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _380130, [], _381070)
^  Unify: (259) [user] subst_vars(";; #[test]", _380130, [], _381070)
   Call: (260) [system] atom(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _380130, [], _381070)
^  Unify: (259) [user] subst_vars(";; #[test]", _380130, [], _381070)
   Call: (260) [system] compound(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _380130, [], _381070)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Exit: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Call: (259) [user] subst_vars([1184, 0], _380132, [], _365194)
^  Unify: (259) [user] subst_vars([1184, 0], [1184, 0], [], [])
   Call: (260) [system] var([1184, 0])
^  Redo: (259) [user] subst_vars([1184, 0], _380132, [], _365194)
^  Unify: (259) [user] subst_vars([1184, 0], [_396002|_396004], [], _365194)
^  Call: (260) [user] subst_vars(1184, _396002, [], _396942)
^  Unify: (260) [user] subst_vars(1184, 1184, [], [])
   Call: (261) [system] var(1184)
^  Redo: (260) [user] subst_vars(1184, _396002, [], _396942)
^  Unify: (260) [user] subst_vars(1184, _396002, [], _396942)
   Call: (261) [system] atom(1184)
^  Redo: (260) [user] subst_vars(1184, _396002, [], _396942)
^  Unify: (260) [user] subst_vars(1184, _396002, [], _396942)
   Call: (261) [system] compound(1184)
^  Redo: (260) [user] subst_vars(1184, _396002, [], _396942)
^  Unify: (260) [user] subst_vars(1184, 1184, [], [])
^  Exit: (260) [user] subst_vars(1184, 1184, [], [])
^  Call: (260) [user] subst_vars([0], _396004, [], _365194)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _396004, [], _365194)
^  Unify: (260) [user] subst_vars([0], [_411874|_411876], [], _365194)
^  Call: (261) [user] subst_vars(0, _411874, [], _412814)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _411874, [], _412814)
^  Unify: (261) [user] subst_vars(0, _411874, [], _412814)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _411874, [], _412814)
^  Unify: (261) [user] subst_vars(0, _411874, [], _412814)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _411874, [], _412814)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _411876, [], _365194)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _411876, [], _365194)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1184, 0], [1184, 0], [], [])
^  Exit: (258) [user] subst_vars([";; #[test]", 1184, 0], [";; #[test]", 1184, 0], [], [])
   Call: (258) [system] compound_name_arguments(_365192, '$COMMENT', [";; #[test]", 1184, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1184, 0), '$COMMENT', [";; #[test]", 1184, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1184, 0), '$COMMENT'(";; #[test]", 1184, 0), [], [])
   Call: (257) [system] _435232=metta_file_buffer(+, '$COMMENT'(";; #[test]", 1184, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; #[test]", 1184, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; #[test]", 1184, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 1184, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 1184, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1184, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1184, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1184, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1184, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1185, 0, 43234, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$stream_position'(43234, 1185, 0, 43234)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _487958))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _487958))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _487958)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _487958)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _487958)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _487958)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _493570))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _493570))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _493570))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _493570))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _493570)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _493570)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _499156))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _499156))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _499156)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _499156)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _499156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _499156)
   Call: (270) [system] var('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _499156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$VAR'(_506616))
   Call: (270) [system] atom('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _499156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _499156)
   Call: (270) [system] '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _499156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _499156)
   Call: (270) [system] '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _499156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _499156)
   Call: (270) [system] '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0)==[_515896, _515902]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _499156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _499156)
   Call: (270) [system] is_list('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _499156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _499156)
   Call: (270) [system] string('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _499156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _5986)
   Call: (270) [system] compound('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
   Exit: (270) [system] compound('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _8200, _8202)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT', [";; fn use_sealed_to_make_scoped_variable() {", 1185, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; fn use_sealed_to_make_scoped_variable() {", 1185, 0], _11942)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn use_sealed_to_make_scoped_variable() {", 1185, 0], _11942)
   Call: (271) [apply] apply:maplist_([";; fn use_sealed_to_make_scoped_variable() {", 1185, 0], _11942, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; fn use_sealed_to_make_scoped_variable() {", 1185, 0], [_14760|_14762], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; fn use_sealed_to_make_scoped_variable() {", _14760)
^  Unify: (272) [user] mfix_vars1(";; fn use_sealed_to_make_scoped_variable() {", _14760)
   Call: (273) [system] var(";; fn use_sealed_to_make_scoped_variable() {")
^  Redo: (272) [user] mfix_vars1(";; fn use_sealed_to_make_scoped_variable() {", _14760)
^  Unify: (272) [user] mfix_vars1(";; fn use_sealed_to_make_scoped_variable() {", '$VAR'(_19406))
   Call: (273) [system] atom(";; fn use_sealed_to_make_scoped_variable() {")
^  Redo: (272) [user] mfix_vars1(";; fn use_sealed_to_make_scoped_variable() {", _14760)
^  Unify: (272) [user] mfix_vars1(";; fn use_sealed_to_make_scoped_variable() {", _14760)
   Call: (273) [system] ";; fn use_sealed_to_make_scoped_variable() {"==true
^  Redo: (272) [user] mfix_vars1(";; fn use_sealed_to_make_scoped_variable() {", _14760)
^  Unify: (272) [user] mfix_vars1(";; fn use_sealed_to_make_scoped_variable() {", _14760)
   Call: (273) [system] ";; fn use_sealed_to_make_scoped_variable() {"==false
^  Redo: (272) [user] mfix_vars1(";; fn use_sealed_to_make_scoped_variable() {", _14760)
^  Unify: (272) [user] mfix_vars1(";; fn use_sealed_to_make_scoped_variable() {", _14760)
   Call: (273) [system] ";; fn use_sealed_to_make_scoped_variable() {"==[_28686, _28692]
^  Redo: (272) [user] mfix_vars1(";; fn use_sealed_to_make_scoped_variable() {", _14760)
^  Unify: (272) [user] mfix_vars1(";; fn use_sealed_to_make_scoped_variable() {", _14760)
   Call: (273) [system] is_list(";; fn use_sealed_to_make_scoped_variable() {")
^  Redo: (272) [user] mfix_vars1(";; fn use_sealed_to_make_scoped_variable() {", _14760)
^  Unify: (272) [user] mfix_vars1(";; fn use_sealed_to_make_scoped_variable() {", _14760)
   Call: (273) [system] string(";; fn use_sealed_to_make_scoped_variable() {")
   Exit: (273) [system] string(";; fn use_sealed_to_make_scoped_variable() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; fn use_sealed_to_make_scoped_variable() {", _14760)
^  Unify: (272) [user] mfix_vars1(";; fn use_sealed_to_make_scoped_variable() {", _14760)
   Call: (273) [system] compound(";; fn use_sealed_to_make_scoped_variable() {")
^  Redo: (272) [user] mfix_vars1(";; fn use_sealed_to_make_scoped_variable() {", _14760)
^  Unify: (272) [user] mfix_vars1(";; fn use_sealed_to_make_scoped_variable() {", _14760)
^  Call: (273) [user] symbol(";; fn use_sealed_to_make_scoped_variable() {")
^  Unify: (273) [user] symbol(";; fn use_sealed_to_make_scoped_variable() {")
   Call: (274) [system] atom(";; fn use_sealed_to_make_scoped_variable() {")
   Fail: (274) [system] atom(";; fn use_sealed_to_make_scoped_variable() {")
^  Fail: (273) [user] symbol(";; fn use_sealed_to_make_scoped_variable() {")
^  Redo: (272) [user] mfix_vars1(";; fn use_sealed_to_make_scoped_variable() {", _14760)
   Call: (273) [system] ";; fn use_sealed_to_make_scoped_variable() {"=_14760
   Exit: (273) [system] ";; fn use_sealed_to_make_scoped_variable() {"=";; fn use_sealed_to_make_scoped_variable() {"
^  Exit: (272) [user] mfix_vars1(";; fn use_sealed_to_make_scoped_variable() {", ";; fn use_sealed_to_make_scoped_variable() {")
   Call: (272) [apply] apply:maplist_([1185, 0], _14762, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1185, 0], [_52758|_52760], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1185, _52758)
^  Unify: (273) [user] mfix_vars1(1185, _52758)
   Call: (274) [system] var(1185)
^  Redo: (273) [user] mfix_vars1(1185, _52758)
^  Unify: (273) [user] mfix_vars1(1185, '$VAR'(_57404))
   Call: (274) [system] atom(1185)
^  Redo: (273) [user] mfix_vars1(1185, _52758)
^  Unify: (273) [user] mfix_vars1(1185, _52758)
   Call: (274) [system] 1185==true
^  Redo: (273) [user] mfix_vars1(1185, _52758)
^  Unify: (273) [user] mfix_vars1(1185, _52758)
   Call: (274) [system] 1185==false
^  Redo: (273) [user] mfix_vars1(1185, _52758)
^  Unify: (273) [user] mfix_vars1(1185, _52758)
   Call: (274) [system] 1185==[_66684, _66690]
^  Redo: (273) [user] mfix_vars1(1185, _52758)
^  Unify: (273) [user] mfix_vars1(1185, _52758)
   Call: (274) [system] is_list(1185)
^  Redo: (273) [user] mfix_vars1(1185, _52758)
^  Unify: (273) [user] mfix_vars1(1185, _52758)
   Call: (274) [system] string(1185)
^  Redo: (273) [user] mfix_vars1(1185, _52758)
^  Unify: (273) [user] mfix_vars1(1185, _52758)
   Call: (274) [system] compound(1185)
^  Redo: (273) [user] mfix_vars1(1185, _52758)
^  Unify: (273) [user] mfix_vars1(1185, _52758)
^  Call: (274) [user] symbol(1185)
^  Unify: (274) [user] symbol(1185)
   Call: (275) [system] atom(1185)
   Fail: (275) [system] atom(1185)
^  Fail: (274) [user] symbol(1185)
^  Redo: (273) [user] mfix_vars1(1185, _52758)
   Call: (274) [system] 1185=_52758
   Exit: (274) [system] 1185=1185
^  Exit: (273) [user] mfix_vars1(1185, 1185)
   Call: (273) [apply] apply:maplist_([0], _52760, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_87084|_87086], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _87084)
^  Unify: (274) [user] mfix_vars1(0, _87084)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _87084)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_91730))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _87084)
^  Unify: (274) [user] mfix_vars1(0, _87084)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _87084)
^  Unify: (274) [user] mfix_vars1(0, _87084)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _87084)
^  Unify: (274) [user] mfix_vars1(0, _87084)
   Call: (275) [system] 0==[_101010, _101016]
^  Redo: (274) [user] mfix_vars1(0, _87084)
^  Unify: (274) [user] mfix_vars1(0, _87084)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _87084)
^  Unify: (274) [user] mfix_vars1(0, _87084)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _87084)
^  Unify: (274) [user] mfix_vars1(0, _87084)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _87084)
^  Unify: (274) [user] mfix_vars1(0, _87084)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _87084)
   Call: (275) [system] 0=_87084
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _87086, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1185, 0], [1185, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; fn use_sealed_to_make_scoped_variable() {", 1185, 0], [";; fn use_sealed_to_make_scoped_variable() {", 1185, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn use_sealed_to_make_scoped_variable() {", 1185, 0], [";; fn use_sealed_to_make_scoped_variable() {", 1185, 0])
   Call: (270) [system] compound_name_arguments(_5986, '$COMMENT', [";; fn use_sealed_to_make_scoped_variable() {", 1185, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT', [";; fn use_sealed_to_make_scoped_variable() {", 1185, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0)))
   Call: (267) [system] '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0)\=@='$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _5972)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _137258))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _137258))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _137258))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _137258))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _137258)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _137258)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _142844))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _142844))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _142844)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _142844)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _142844)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0)))
   Call: (267) [system] '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0)\=@='$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _137258)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _5952))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _5952))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _5952))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _5952))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _5952)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _165164))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _165164))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _165164)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _165164)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _165164)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0)))
   Call: (267) [system] '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0)\=@='$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0)))
   Call: (261) [system] '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0)\=@='$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _193942, [], _193944)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _193942, [], _193944)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _193942, [], _193944)
   Call: (258) [system] atom('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _193942, [], _193944)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _193942, [], _193944)
   Call: (258) [system] compound('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
   Exit: (258) [system] compound('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), _203258, _203260)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT', [";; fn use_sealed_to_make_scoped_variable() {", 1185, 0])
^  Call: (258) [user] subst_vars([";; fn use_sealed_to_make_scoped_variable() {", 1185, 0], _205144, [], _193944)
^  Unify: (258) [user] subst_vars([";; fn use_sealed_to_make_scoped_variable() {", 1185, 0], [";; fn use_sealed_to_make_scoped_variable() {", 1185, 0], [], [])
   Call: (259) [system] var([";; fn use_sealed_to_make_scoped_variable() {", 1185, 0])
^  Redo: (258) [user] subst_vars([";; fn use_sealed_to_make_scoped_variable() {", 1185, 0], _205144, [], _193944)
^  Unify: (258) [user] subst_vars([";; fn use_sealed_to_make_scoped_variable() {", 1185, 0], [_208880|_208882], [], _193944)
^  Call: (259) [user] subst_vars(";; fn use_sealed_to_make_scoped_variable() {", _208880, [], _209820)
^  Unify: (259) [user] subst_vars(";; fn use_sealed_to_make_scoped_variable() {", ";; fn use_sealed_to_make_scoped_variable() {", [], [])
   Call: (260) [system] var(";; fn use_sealed_to_make_scoped_variable() {")
^  Redo: (259) [user] subst_vars(";; fn use_sealed_to_make_scoped_variable() {", _208880, [], _209820)
^  Unify: (259) [user] subst_vars(";; fn use_sealed_to_make_scoped_variable() {", _208880, [], _209820)
   Call: (260) [system] atom(";; fn use_sealed_to_make_scoped_variable() {")
^  Redo: (259) [user] subst_vars(";; fn use_sealed_to_make_scoped_variable() {", _208880, [], _209820)
^  Unify: (259) [user] subst_vars(";; fn use_sealed_to_make_scoped_variable() {", _208880, [], _209820)
   Call: (260) [system] compound(";; fn use_sealed_to_make_scoped_variable() {")
^  Redo: (259) [user] subst_vars(";; fn use_sealed_to_make_scoped_variable() {", _208880, [], _209820)
^  Unify: (259) [user] subst_vars(";; fn use_sealed_to_make_scoped_variable() {", ";; fn use_sealed_to_make_scoped_variable() {", [], [])
^  Exit: (259) [user] subst_vars(";; fn use_sealed_to_make_scoped_variable() {", ";; fn use_sealed_to_make_scoped_variable() {", [], [])
^  Call: (259) [user] subst_vars([1185, 0], _208882, [], _193944)
^  Unify: (259) [user] subst_vars([1185, 0], [1185, 0], [], [])
   Call: (260) [system] var([1185, 0])
^  Redo: (259) [user] subst_vars([1185, 0], _208882, [], _193944)
^  Unify: (259) [user] subst_vars([1185, 0], [_224752|_224754], [], _193944)
^  Call: (260) [user] subst_vars(1185, _224752, [], _225692)
^  Unify: (260) [user] subst_vars(1185, 1185, [], [])
   Call: (261) [system] var(1185)
^  Redo: (260) [user] subst_vars(1185, _224752, [], _225692)
^  Unify: (260) [user] subst_vars(1185, _224752, [], _225692)
   Call: (261) [system] atom(1185)
^  Redo: (260) [user] subst_vars(1185, _224752, [], _225692)
^  Unify: (260) [user] subst_vars(1185, _224752, [], _225692)
   Call: (261) [system] compound(1185)
^  Redo: (260) [user] subst_vars(1185, _224752, [], _225692)
^  Unify: (260) [user] subst_vars(1185, 1185, [], [])
^  Exit: (260) [user] subst_vars(1185, 1185, [], [])
^  Call: (260) [user] subst_vars([0], _224754, [], _193944)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _224754, [], _193944)
^  Unify: (260) [user] subst_vars([0], [_240624|_240626], [], _193944)
^  Call: (261) [user] subst_vars(0, _240624, [], _241564)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _240624, [], _241564)
^  Unify: (261) [user] subst_vars(0, _240624, [], _241564)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _240624, [], _241564)
^  Unify: (261) [user] subst_vars(0, _240624, [], _241564)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _240624, [], _241564)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _240626, [], _193944)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _240626, [], _193944)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1185, 0], [1185, 0], [], [])
^  Exit: (258) [user] subst_vars([";; fn use_sealed_to_make_scoped_variable() {", 1185, 0], [";; fn use_sealed_to_make_scoped_variable() {", 1185, 0], [], [])
   Call: (258) [system] compound_name_arguments(_193942, '$COMMENT', [";; fn use_sealed_to_make_scoped_variable() {", 1185, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT', [";; fn use_sealed_to_make_scoped_variable() {", 1185, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), [], [])
   Call: (257) [system] _263982=metta_file_buffer(+, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn use_sealed_to_make_scoped_variable() {", 1185, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1186, 0, 43279, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$stream_position'(43279, 1186, 0, 43279)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _316718))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _316718))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _316718)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _316718)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _316718)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _316718)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _322330))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _322330))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _322330))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _322330))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _322330)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _322330)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _327916))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _327916))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _327916)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _327916)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _327916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _327916)
   Call: (270) [system] var('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _327916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$VAR'(_335376))
   Call: (270) [system] atom('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _327916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _327916)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _327916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _327916)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _327916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _327916)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0)==[_344656, _344662]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _327916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _327916)
   Call: (270) [system] is_list('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _327916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _327916)
   Call: (270) [system] string('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _327916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _327916)
   Call: (270) [system] compound('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _354858, _354860)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT', [";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0], _358600)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0], _358600)
   Call: (271) [apply] apply:maplist_([";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0], _358600, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0], [_361418|_361420], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _361418)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _361418)
   Call: (273) [system] var(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _361418)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", '$VAR'(_366064))
   Call: (273) [system] atom(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _361418)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _361418)
   Call: (273) [system] ";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));"==true
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _361418)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _361418)
   Call: (273) [system] ";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));"==false
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _361418)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _361418)
   Call: (273) [system] ";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));"==[_375344, _375350]
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _361418)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _361418)
   Call: (273) [system] is_list(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _361418)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _361418)
   Call: (273) [system] string(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));")
   Exit: (273) [system] string(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _361418)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _361418)
   Call: (273) [system] compound(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _361418)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _361418)
^  Call: (273) [user] symbol(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));")
^  Unify: (273) [user] symbol(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));")
   Call: (274) [system] atom(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));")
   Fail: (274) [system] atom(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));")
^  Fail: (273) [user] symbol(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _361418)
   Call: (273) [system] ";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));"=_361418
   Exit: (273) [system] ";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));"=";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));"
^  Exit: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", ";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));")
   Call: (272) [apply] apply:maplist_([1186, 0], _361420, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1186, 0], [_399416|_399418], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1186, _399416)
^  Unify: (273) [user] mfix_vars1(1186, _399416)
   Call: (274) [system] var(1186)
^  Redo: (273) [user] mfix_vars1(1186, _399416)
^  Unify: (273) [user] mfix_vars1(1186, '$VAR'(_404062))
   Call: (274) [system] atom(1186)
^  Redo: (273) [user] mfix_vars1(1186, _399416)
^  Unify: (273) [user] mfix_vars1(1186, _399416)
   Call: (274) [system] 1186==true
^  Redo: (273) [user] mfix_vars1(1186, _399416)
^  Unify: (273) [user] mfix_vars1(1186, _399416)
   Call: (274) [system] 1186==false
^  Redo: (273) [user] mfix_vars1(1186, _399416)
^  Unify: (273) [user] mfix_vars1(1186, _399416)
   Call: (274) [system] 1186==[_413342, _413348]
^  Redo: (273) [user] mfix_vars1(1186, _399416)
^  Unify: (273) [user] mfix_vars1(1186, _399416)
   Call: (274) [system] is_list(1186)
^  Redo: (273) [user] mfix_vars1(1186, _399416)
^  Unify: (273) [user] mfix_vars1(1186, _399416)
   Call: (274) [system] string(1186)
^  Redo: (273) [user] mfix_vars1(1186, _399416)
^  Unify: (273) [user] mfix_vars1(1186, _399416)
   Call: (274) [system] compound(1186)
^  Redo: (273) [user] mfix_vars1(1186, _399416)
^  Unify: (273) [user] mfix_vars1(1186, _399416)
^  Call: (274) [user] symbol(1186)
^  Unify: (274) [user] symbol(1186)
   Call: (275) [system] atom(1186)
   Fail: (275) [system] atom(1186)
^  Fail: (274) [user] symbol(1186)
^  Redo: (273) [user] mfix_vars1(1186, _399416)
   Call: (274) [system] 1186=_399416
   Exit: (274) [system] 1186=1186
^  Exit: (273) [user] mfix_vars1(1186, 1186)
   Call: (273) [apply] apply:maplist_([0], _399418, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_433742|_433744], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _433742)
^  Unify: (274) [user] mfix_vars1(0, _433742)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _433742)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_438388))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _433742)
^  Unify: (274) [user] mfix_vars1(0, _433742)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _433742)
^  Unify: (274) [user] mfix_vars1(0, _433742)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _433742)
^  Unify: (274) [user] mfix_vars1(0, _433742)
   Call: (275) [system] 0==[_447668, _447674]
^  Redo: (274) [user] mfix_vars1(0, _433742)
^  Unify: (274) [user] mfix_vars1(0, _433742)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _433742)
^  Unify: (274) [user] mfix_vars1(0, _433742)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _433742)
^  Unify: (274) [user] mfix_vars1(0, _433742)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _433742)
^  Unify: (274) [user] mfix_vars1(0, _433742)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _433742)
   Call: (275) [system] 0=_433742
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _433744, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1186, 0], [1186, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0], [";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0], [";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0])
   Call: (270) [system] compound_name_arguments(_327916, '$COMMENT', [";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT', [";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0)\=@='$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _322330)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _483916))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _483916))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _483916))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _483916))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _483916)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _483916)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _489502))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _489502))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _489502)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _489502)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _489502)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0)\=@='$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _483916)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _316718))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _316718))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _316718))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _316718))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _316718)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _316718)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _511822))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _511822))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _511822)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _511822)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _511822)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0)\=@='$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _5962)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0)))
   Call: (261) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0)\=@='$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _22574, [], _22576)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _22574, [], _22576)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _22574, [], _22576)
   Call: (258) [system] atom('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _22574, [], _22576)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _22574, [], _22576)
   Call: (258) [system] compound('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), _31890, _31892)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT', [";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0])
^  Call: (258) [user] subst_vars([";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0], _33776, [], _22576)
^  Unify: (258) [user] subst_vars([";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0], [";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0], [], [])
   Call: (259) [system] var([";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0])
^  Redo: (258) [user] subst_vars([";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0], _33776, [], _22576)
^  Unify: (258) [user] subst_vars([";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0], [_37512|_37514], [], _22576)
^  Call: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _37512, [], _38452)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", ";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", [], [])
   Call: (260) [system] var(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _37512, [], _38452)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _37512, [], _38452)
   Call: (260) [system] atom(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _37512, [], _38452)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _37512, [], _38452)
   Call: (260) [system] compound(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", _37512, [], _38452)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", ";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", [], [])
^  Exit: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", ";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", [], [])
^  Call: (259) [user] subst_vars([1186, 0], _37514, [], _22576)
^  Unify: (259) [user] subst_vars([1186, 0], [1186, 0], [], [])
   Call: (260) [system] var([1186, 0])
^  Redo: (259) [user] subst_vars([1186, 0], _37514, [], _22576)
^  Unify: (259) [user] subst_vars([1186, 0], [_53384|_53386], [], _22576)
^  Call: (260) [user] subst_vars(1186, _53384, [], _54324)
^  Unify: (260) [user] subst_vars(1186, 1186, [], [])
   Call: (261) [system] var(1186)
^  Redo: (260) [user] subst_vars(1186, _53384, [], _54324)
^  Unify: (260) [user] subst_vars(1186, _53384, [], _54324)
   Call: (261) [system] atom(1186)
^  Redo: (260) [user] subst_vars(1186, _53384, [], _54324)
^  Unify: (260) [user] subst_vars(1186, _53384, [], _54324)
   Call: (261) [system] compound(1186)
^  Redo: (260) [user] subst_vars(1186, _53384, [], _54324)
^  Unify: (260) [user] subst_vars(1186, 1186, [], [])
^  Exit: (260) [user] subst_vars(1186, 1186, [], [])
^  Call: (260) [user] subst_vars([0], _53386, [], _22576)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _53386, [], _22576)
^  Unify: (260) [user] subst_vars([0], [_69256|_69258], [], _22576)
^  Call: (261) [user] subst_vars(0, _69256, [], _70196)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _69256, [], _70196)
^  Unify: (261) [user] subst_vars(0, _69256, [], _70196)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _69256, [], _70196)
^  Unify: (261) [user] subst_vars(0, _69256, [], _70196)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _69256, [], _70196)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _69258, [], _22576)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _69258, [], _22576)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1186, 0], [1186, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0], [";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0], [], [])
   Call: (258) [system] compound_name_arguments(_22574, '$COMMENT', [";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT', [";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), [], [])
   Call: (257) [system] _92614=metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![]]));", 1186, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1187, 0, 43365, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$stream_position'(43365, 1187, 0, 43365)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _145352))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _145352))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _145352)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _145352)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _145352)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _145352)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _150964))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _150964))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _150964))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _150964))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _150964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _150964)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _156550))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _156550))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _156550)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _156550)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _156550)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _156550)
   Call: (270) [system] var('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _156550)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$VAR'(_164010))
   Call: (270) [system] atom('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _156550)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _156550)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _156550)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _156550)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _156550)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _156550)
   Call: (270) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0)==[_173290, _173296]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _156550)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _156550)
   Call: (270) [system] is_list('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _156550)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _156550)
   Call: (270) [system] string('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _156550)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _156550)
   Call: (270) [system] compound('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _183492, _183494)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT', [";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0], _187234)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0], _187234)
   Call: (271) [apply] apply:maplist_([";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0], _187234, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0], [_190052|_190054], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _190052)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _190052)
   Call: (273) [system] var(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _190052)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", '$VAR'(_194698))
   Call: (273) [system] atom(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _190052)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _190052)
   Call: (273) [system] ";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))"==true
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _190052)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _190052)
   Call: (273) [system] ";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))"==false
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _190052)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _190052)
   Call: (273) [system] ";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))"==[_203978, _203984]
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _190052)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _190052)
   Call: (273) [system] is_list(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _190052)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _190052)
   Call: (273) [system] string(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
   Exit: (273) [system] string(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _190052)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _190052)
   Call: (273) [system] compound(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _190052)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _190052)
^  Call: (273) [user] symbol(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
^  Unify: (273) [user] symbol(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
   Call: (274) [system] atom(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
   Fail: (274) [system] atom(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
^  Fail: (273) [user] symbol(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _190052)
   Call: (273) [system] ";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))"=_190052
   Exit: (273) [system] ";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))"=";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))"
^  Exit: (272) [user] mfix_vars1(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", ";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
   Call: (272) [apply] apply:maplist_([1187, 0], _190054, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1187, 0], [_228050|_228052], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1187, _228050)
^  Unify: (273) [user] mfix_vars1(1187, _228050)
   Call: (274) [system] var(1187)
^  Redo: (273) [user] mfix_vars1(1187, _228050)
^  Unify: (273) [user] mfix_vars1(1187, '$VAR'(_232696))
   Call: (274) [system] atom(1187)
^  Redo: (273) [user] mfix_vars1(1187, _228050)
^  Unify: (273) [user] mfix_vars1(1187, _228050)
   Call: (274) [system] 1187==true
^  Redo: (273) [user] mfix_vars1(1187, _228050)
^  Unify: (273) [user] mfix_vars1(1187, _228050)
   Call: (274) [system] 1187==false
^  Redo: (273) [user] mfix_vars1(1187, _228050)
^  Unify: (273) [user] mfix_vars1(1187, _228050)
   Call: (274) [system] 1187==[_241976, _241982]
^  Redo: (273) [user] mfix_vars1(1187, _228050)
^  Unify: (273) [user] mfix_vars1(1187, _228050)
   Call: (274) [system] is_list(1187)
^  Redo: (273) [user] mfix_vars1(1187, _228050)
^  Unify: (273) [user] mfix_vars1(1187, _228050)
   Call: (274) [system] string(1187)
^  Redo: (273) [user] mfix_vars1(1187, _228050)
^  Unify: (273) [user] mfix_vars1(1187, _228050)
   Call: (274) [system] compound(1187)
^  Redo: (273) [user] mfix_vars1(1187, _228050)
^  Unify: (273) [user] mfix_vars1(1187, _228050)
^  Call: (274) [user] symbol(1187)
^  Unify: (274) [user] symbol(1187)
   Call: (275) [system] atom(1187)
   Fail: (275) [system] atom(1187)
^  Fail: (274) [user] symbol(1187)
^  Redo: (273) [user] mfix_vars1(1187, _228050)
   Call: (274) [system] 1187=_228050
   Exit: (274) [system] 1187=1187
^  Exit: (273) [user] mfix_vars1(1187, 1187)
   Call: (273) [apply] apply:maplist_([0], _228052, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_262376|_262378], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _262376)
^  Unify: (274) [user] mfix_vars1(0, _262376)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _262376)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_267022))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _262376)
^  Unify: (274) [user] mfix_vars1(0, _262376)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _262376)
^  Unify: (274) [user] mfix_vars1(0, _262376)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _262376)
^  Unify: (274) [user] mfix_vars1(0, _262376)
   Call: (275) [system] 0==[_276302, _276308]
^  Redo: (274) [user] mfix_vars1(0, _262376)
^  Unify: (274) [user] mfix_vars1(0, _262376)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _262376)
^  Unify: (274) [user] mfix_vars1(0, _262376)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _262376)
^  Unify: (274) [user] mfix_vars1(0, _262376)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _262376)
^  Unify: (274) [user] mfix_vars1(0, _262376)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _262376)
   Call: (275) [system] 0=_262376
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _262378, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1187, 0], [1187, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0], [";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0], [";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0])
   Call: (270) [system] compound_name_arguments(_156550, '$COMMENT', [";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT', [";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0)\=@='$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _150964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _312550))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _312550))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _312550))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _312550))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _312550)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _312550)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _318136))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _318136))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _318136)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _318136)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _318136)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0)\=@='$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _312550)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _145352))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _145352))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _145352))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _145352))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _145352)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _145352)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _340456))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _340456))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _340456)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _340456)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _340456)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0)\=@='$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _145352)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0)))
   Call: (261) [system] '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0)\=@='$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _369234, [], _369236)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _369234, [], _369236)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _369234, [], _369236)
   Call: (258) [system] atom('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _369234, [], _369236)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _369234, [], _369236)
   Call: (258) [system] compound('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), _378550, _378552)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT', [";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0])
^  Call: (258) [user] subst_vars([";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0], _380436, [], _369236)
^  Unify: (258) [user] subst_vars([";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0], [";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0], [], [])
   Call: (259) [system] var([";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0])
^  Redo: (258) [user] subst_vars([";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0], _380436, [], _369236)
^  Unify: (258) [user] subst_vars([";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0], [_384172|_384174], [], _369236)
^  Call: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _384172, [], _385112)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", ";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", [], [])
   Call: (260) [system] var(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _384172, [], _385112)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _384172, [], _385112)
   Call: (260) [system] atom(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _384172, [], _385112)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _384172, [], _385112)
   Call: (260) [system] compound(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
^  Redo: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _384172, [], _385112)
^  Unify: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", ";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", [], [])
^  Exit: (259) [user] subst_vars(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", ";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", [], [])
^  Call: (259) [user] subst_vars([1187, 0], _384174, [], _369236)
^  Unify: (259) [user] subst_vars([1187, 0], [1187, 0], [], [])
   Call: (260) [system] var([1187, 0])
^  Redo: (259) [user] subst_vars([1187, 0], _384174, [], _369236)
^  Unify: (259) [user] subst_vars([1187, 0], [_400044|_400046], [], _369236)
^  Call: (260) [user] subst_vars(1187, _400044, [], _400984)
^  Unify: (260) [user] subst_vars(1187, 1187, [], [])
   Call: (261) [system] var(1187)
^  Redo: (260) [user] subst_vars(1187, _400044, [], _400984)
^  Unify: (260) [user] subst_vars(1187, _400044, [], _400984)
   Call: (261) [system] atom(1187)
^  Redo: (260) [user] subst_vars(1187, _400044, [], _400984)
^  Unify: (260) [user] subst_vars(1187, _400044, [], _400984)
   Call: (261) [system] compound(1187)
^  Redo: (260) [user] subst_vars(1187, _400044, [], _400984)
^  Unify: (260) [user] subst_vars(1187, 1187, [], [])
^  Exit: (260) [user] subst_vars(1187, 1187, [], [])
^  Call: (260) [user] subst_vars([0], _400046, [], _369236)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _400046, [], _369236)
^  Unify: (260) [user] subst_vars([0], [_415916|_415918], [], _369236)
^  Call: (261) [user] subst_vars(0, _415916, [], _416856)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _415916, [], _416856)
^  Unify: (261) [user] subst_vars(0, _415916, [], _416856)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _415916, [], _416856)
^  Unify: (261) [user] subst_vars(0, _415916, [], _416856)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _415916, [], _416856)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _415918, [], _369236)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _415918, [], _369236)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1187, 0], [1187, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0], [";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0], [], [])
   Call: (258) [system] compound_name_arguments(_369234, '$COMMENT', [";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT', [";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), [], [])
   Call: (257) [system] _439274=metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1187, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1188, 0, 43459, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$stream_position'(43459, 1188, 0, 43459)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _492012))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _492012))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _492012)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _492012)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _492012)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _492012)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _497624))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _497624))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _497624))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _497624))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _497624)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _497624)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _503210))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _503210))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _503210)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _503210)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _503210)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _503210)
   Call: (270) [system] var('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _503210)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$VAR'(_510670))
   Call: (270) [system] atom('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _503210)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _503210)
   Call: (270) [system] '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _503210)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _503210)
   Call: (270) [system] '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _503210)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _503210)
   Call: (270) [system] '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0)==[_519950, _519956]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _503210)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _503210)
   Call: (270) [system] is_list('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _5998)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _5998)
   Call: (270) [system] string('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _5998)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _5998)
   Call: (270) [system] compound('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _12232, _12234)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT', [";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0], _15974)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0], _15974)
   Call: (271) [apply] apply:maplist_([";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0], _15974, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0], [_18792|_18794], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _18792)
^  Unify: (272) [user] mfix_vars1(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _18792)
   Call: (273) [system] var(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (272) [user] mfix_vars1(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _18792)
^  Unify: (272) [user] mfix_vars1(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", '$VAR'(_23438))
   Call: (273) [system] atom(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (272) [user] mfix_vars1(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _18792)
^  Unify: (272) [user] mfix_vars1(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _18792)
   Call: (273) [system] ";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));"==true
^  Redo: (272) [user] mfix_vars1(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _18792)
^  Unify: (272) [user] mfix_vars1(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _18792)
   Call: (273) [system] ";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));"==false
^  Redo: (272) [user] mfix_vars1(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _18792)
^  Unify: (272) [user] mfix_vars1(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _18792)
   Call: (273) [system] ";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));"==[_32718, _32724]
^  Redo: (272) [user] mfix_vars1(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _18792)
^  Unify: (272) [user] mfix_vars1(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _18792)
   Call: (273) [system] is_list(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (272) [user] mfix_vars1(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _18792)
^  Unify: (272) [user] mfix_vars1(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _18792)
   Call: (273) [system] string(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
   Exit: (273) [system] string(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _18792)
^  Unify: (272) [user] mfix_vars1(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _18792)
   Call: (273) [system] compound(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (272) [user] mfix_vars1(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _18792)
^  Unify: (272) [user] mfix_vars1(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _18792)
^  Call: (273) [user] symbol(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Unify: (273) [user] symbol(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
   Call: (274) [system] atom(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
   Fail: (274) [system] atom(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Fail: (273) [user] symbol(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (272) [user] mfix_vars1(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _18792)
   Call: (273) [system] ";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));"=_18792
   Exit: (273) [system] ";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));"=";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));"
^  Exit: (272) [user] mfix_vars1(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", ";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
   Call: (272) [apply] apply:maplist_([1188, 0], _18794, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1188, 0], [_56790|_56792], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1188, _56790)
^  Unify: (273) [user] mfix_vars1(1188, _56790)
   Call: (274) [system] var(1188)
^  Redo: (273) [user] mfix_vars1(1188, _56790)
^  Unify: (273) [user] mfix_vars1(1188, '$VAR'(_61436))
   Call: (274) [system] atom(1188)
^  Redo: (273) [user] mfix_vars1(1188, _56790)
^  Unify: (273) [user] mfix_vars1(1188, _56790)
   Call: (274) [system] 1188==true
^  Redo: (273) [user] mfix_vars1(1188, _56790)
^  Unify: (273) [user] mfix_vars1(1188, _56790)
   Call: (274) [system] 1188==false
^  Redo: (273) [user] mfix_vars1(1188, _56790)
^  Unify: (273) [user] mfix_vars1(1188, _56790)
   Call: (274) [system] 1188==[_70716, _70722]
^  Redo: (273) [user] mfix_vars1(1188, _56790)
^  Unify: (273) [user] mfix_vars1(1188, _56790)
   Call: (274) [system] is_list(1188)
^  Redo: (273) [user] mfix_vars1(1188, _56790)
^  Unify: (273) [user] mfix_vars1(1188, _56790)
   Call: (274) [system] string(1188)
^  Redo: (273) [user] mfix_vars1(1188, _56790)
^  Unify: (273) [user] mfix_vars1(1188, _56790)
   Call: (274) [system] compound(1188)
^  Redo: (273) [user] mfix_vars1(1188, _56790)
^  Unify: (273) [user] mfix_vars1(1188, _56790)
^  Call: (274) [user] symbol(1188)
^  Unify: (274) [user] symbol(1188)
   Call: (275) [system] atom(1188)
   Fail: (275) [system] atom(1188)
^  Fail: (274) [user] symbol(1188)
^  Redo: (273) [user] mfix_vars1(1188, _56790)
   Call: (274) [system] 1188=_56790
   Exit: (274) [system] 1188=1188
^  Exit: (273) [user] mfix_vars1(1188, 1188)
   Call: (273) [apply] apply:maplist_([0], _56792, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_91116|_91118], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _91116)
^  Unify: (274) [user] mfix_vars1(0, _91116)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _91116)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_95762))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _91116)
^  Unify: (274) [user] mfix_vars1(0, _91116)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _91116)
^  Unify: (274) [user] mfix_vars1(0, _91116)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _91116)
^  Unify: (274) [user] mfix_vars1(0, _91116)
   Call: (275) [system] 0==[_105042, _105048]
^  Redo: (274) [user] mfix_vars1(0, _91116)
^  Unify: (274) [user] mfix_vars1(0, _91116)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _91116)
^  Unify: (274) [user] mfix_vars1(0, _91116)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _91116)
^  Unify: (274) [user] mfix_vars1(0, _91116)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _91116)
^  Unify: (274) [user] mfix_vars1(0, _91116)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _91116)
   Call: (275) [system] 0=_91116
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _91118, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1188, 0], [1188, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0], [";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0], [";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0])
   Call: (270) [system] compound_name_arguments(_5998, '$COMMENT', [";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT', [";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0)))
   Call: (267) [system] '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0)\=@='$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _5984)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _141290))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _141290))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _141290))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _141290))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _141290)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _141290)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _146876))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _146876))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _146876)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _146876)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _146876)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0)))
   Call: (267) [system] '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0)\=@='$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _141290)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _5964))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _5964))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _5964))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _5964))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _5964)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _5964)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _169196))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _169196))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _169196)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _169196)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _169196)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0)))
   Call: (267) [system] '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0)\=@='$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _5964)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0)))
   Call: (261) [system] '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0)\=@='$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _197974, [], _197976)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _197974, [], _197976)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _197974, [], _197976)
   Call: (258) [system] atom('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _197974, [], _197976)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _197974, [], _197976)
   Call: (258) [system] compound('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), _207290, _207292)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT', [";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0])
^  Call: (258) [user] subst_vars([";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0], _209176, [], _197976)
^  Unify: (258) [user] subst_vars([";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0], [";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0], [], [])
   Call: (259) [system] var([";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0])
^  Redo: (258) [user] subst_vars([";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0], _209176, [], _197976)
^  Unify: (258) [user] subst_vars([";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0], [_212912|_212914], [], _197976)
^  Call: (259) [user] subst_vars(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _212912, [], _213852)
^  Unify: (259) [user] subst_vars(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", ";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", [], [])
   Call: (260) [system] var(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (259) [user] subst_vars(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _212912, [], _213852)
^  Unify: (259) [user] subst_vars(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _212912, [], _213852)
   Call: (260) [system] atom(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (259) [user] subst_vars(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _212912, [], _213852)
^  Unify: (259) [user] subst_vars(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _212912, [], _213852)
   Call: (260) [system] compound(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (259) [user] subst_vars(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _212912, [], _213852)
^  Unify: (259) [user] subst_vars(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", ";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", [], [])
^  Exit: (259) [user] subst_vars(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", ";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", [], [])
^  Call: (259) [user] subst_vars([1188, 0], _212914, [], _197976)
^  Unify: (259) [user] subst_vars([1188, 0], [1188, 0], [], [])
   Call: (260) [system] var([1188, 0])
^  Redo: (259) [user] subst_vars([1188, 0], _212914, [], _197976)
^  Unify: (259) [user] subst_vars([1188, 0], [_228784|_228786], [], _197976)
^  Call: (260) [user] subst_vars(1188, _228784, [], _229724)
^  Unify: (260) [user] subst_vars(1188, 1188, [], [])
   Call: (261) [system] var(1188)
^  Redo: (260) [user] subst_vars(1188, _228784, [], _229724)
^  Unify: (260) [user] subst_vars(1188, _228784, [], _229724)
   Call: (261) [system] atom(1188)
^  Redo: (260) [user] subst_vars(1188, _228784, [], _229724)
^  Unify: (260) [user] subst_vars(1188, _228784, [], _229724)
   Call: (261) [system] compound(1188)
^  Redo: (260) [user] subst_vars(1188, _228784, [], _229724)
^  Unify: (260) [user] subst_vars(1188, 1188, [], [])
^  Exit: (260) [user] subst_vars(1188, 1188, [], [])
^  Call: (260) [user] subst_vars([0], _228786, [], _197976)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _228786, [], _197976)
^  Unify: (260) [user] subst_vars([0], [_244656|_244658], [], _197976)
^  Call: (261) [user] subst_vars(0, _244656, [], _245596)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _244656, [], _245596)
^  Unify: (261) [user] subst_vars(0, _244656, [], _245596)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _244656, [], _245596)
^  Unify: (261) [user] subst_vars(0, _244656, [], _245596)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _244656, [], _245596)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _244658, [], _197976)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _244658, [], _197976)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1188, 0], [1188, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0], [";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0], [], [])
   Call: (258) [system] compound_name_arguments(_197974, '$COMMENT', [";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT', [";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), [], [])
   Call: (257) [system] _268014=metta_file_buffer(+, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1188, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1189, 0, 43548, '$COMMENT'(";; }", 1189, 0), '$stream_position'(43548, 1189, 0, 43548)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1189, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1189, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; }", 1189, 0), _320730))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1189, 0), _320730))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; }", 1189, 0), _320730)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1189, 0), _320730)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1189, 0), _320730)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1189, 0), _320730)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; }", 1189, 0), _326342))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1189, 0), _326342))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1189, 0), _326342))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1189, 0), _326342))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1189, 0), _326342)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1189, 0), _326342)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; }", 1189, 0), _331928))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1189, 0), _331928))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; }", 1189, 0), _331928)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1189, 0), _331928)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; }", 1189, 0), _331928)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1189, 0), _331928)
   Call: (270) [system] var('$COMMENT'(";; }", 1189, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1189, 0), _331928)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1189, 0), '$VAR'(_339388))
   Call: (270) [system] atom('$COMMENT'(";; }", 1189, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1189, 0), _331928)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1189, 0), _331928)
   Call: (270) [system] '$COMMENT'(";; }", 1189, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1189, 0), _331928)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1189, 0), _331928)
   Call: (270) [system] '$COMMENT'(";; }", 1189, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1189, 0), _331928)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1189, 0), _331928)
   Call: (270) [system] '$COMMENT'(";; }", 1189, 0)==[_348668, _348674]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1189, 0), _331928)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1189, 0), _331928)
   Call: (270) [system] is_list('$COMMENT'(";; }", 1189, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1189, 0), _331928)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1189, 0), _331928)
   Call: (270) [system] string('$COMMENT'(";; }", 1189, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1189, 0), _331928)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1189, 0), _331928)
   Call: (270) [system] compound('$COMMENT'(";; }", 1189, 0))
   Exit: (270) [system] compound('$COMMENT'(";; }", 1189, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1189, 0), _358870, _358872)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1189, 0), '$COMMENT', [";; }", 1189, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; }", 1189, 0], _362612)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1189, 0], _362612)
   Call: (271) [apply] apply:maplist_([";; }", 1189, 0], _362612, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; }", 1189, 0], [_365430|_365432], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; }", _365430)
^  Unify: (272) [user] mfix_vars1(";; }", _365430)
   Call: (273) [system] var(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _365430)
^  Unify: (272) [user] mfix_vars1(";; }", '$VAR'(_370076))
   Call: (273) [system] atom(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _365430)
^  Unify: (272) [user] mfix_vars1(";; }", _365430)
   Call: (273) [system] ";; }"==true
^  Redo: (272) [user] mfix_vars1(";; }", _365430)
^  Unify: (272) [user] mfix_vars1(";; }", _365430)
   Call: (273) [system] ";; }"==false
^  Redo: (272) [user] mfix_vars1(";; }", _365430)
^  Unify: (272) [user] mfix_vars1(";; }", _365430)
   Call: (273) [system] ";; }"==[_379356, _379362]
^  Redo: (272) [user] mfix_vars1(";; }", _365430)
^  Unify: (272) [user] mfix_vars1(";; }", _365430)
   Call: (273) [system] is_list(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _365430)
^  Unify: (272) [user] mfix_vars1(";; }", _365430)
   Call: (273) [system] string(";; }")
   Exit: (273) [system] string(";; }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; }", _365430)
^  Unify: (272) [user] mfix_vars1(";; }", _365430)
   Call: (273) [system] compound(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _365430)
^  Unify: (272) [user] mfix_vars1(";; }", _365430)
^  Call: (273) [user] symbol(";; }")
^  Unify: (273) [user] symbol(";; }")
   Call: (274) [system] atom(";; }")
   Fail: (274) [system] atom(";; }")
^  Fail: (273) [user] symbol(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _365430)
   Call: (273) [system] ";; }"=_365430
   Exit: (273) [system] ";; }"=";; }"
^  Exit: (272) [user] mfix_vars1(";; }", ";; }")
   Call: (272) [apply] apply:maplist_([1189, 0], _365432, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1189, 0], [_403428|_403430], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1189, _403428)
^  Unify: (273) [user] mfix_vars1(1189, _403428)
   Call: (274) [system] var(1189)
^  Redo: (273) [user] mfix_vars1(1189, _403428)
^  Unify: (273) [user] mfix_vars1(1189, '$VAR'(_408074))
   Call: (274) [system] atom(1189)
^  Redo: (273) [user] mfix_vars1(1189, _403428)
^  Unify: (273) [user] mfix_vars1(1189, _403428)
   Call: (274) [system] 1189==true
^  Redo: (273) [user] mfix_vars1(1189, _403428)
^  Unify: (273) [user] mfix_vars1(1189, _403428)
   Call: (274) [system] 1189==false
^  Redo: (273) [user] mfix_vars1(1189, _403428)
^  Unify: (273) [user] mfix_vars1(1189, _403428)
   Call: (274) [system] 1189==[_417354, _417360]
^  Redo: (273) [user] mfix_vars1(1189, _403428)
^  Unify: (273) [user] mfix_vars1(1189, _403428)
   Call: (274) [system] is_list(1189)
^  Redo: (273) [user] mfix_vars1(1189, _403428)
^  Unify: (273) [user] mfix_vars1(1189, _403428)
   Call: (274) [system] string(1189)
^  Redo: (273) [user] mfix_vars1(1189, _403428)
^  Unify: (273) [user] mfix_vars1(1189, _403428)
   Call: (274) [system] compound(1189)
^  Redo: (273) [user] mfix_vars1(1189, _403428)
^  Unify: (273) [user] mfix_vars1(1189, _403428)
^  Call: (274) [user] symbol(1189)
^  Unify: (274) [user] symbol(1189)
   Call: (275) [system] atom(1189)
   Fail: (275) [system] atom(1189)
^  Fail: (274) [user] symbol(1189)
^  Redo: (273) [user] mfix_vars1(1189, _403428)
   Call: (274) [system] 1189=_403428
   Exit: (274) [system] 1189=1189
^  Exit: (273) [user] mfix_vars1(1189, 1189)
   Call: (273) [apply] apply:maplist_([0], _403430, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_437754|_437756], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _437754)
^  Unify: (274) [user] mfix_vars1(0, _437754)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _437754)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_442400))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _437754)
^  Unify: (274) [user] mfix_vars1(0, _437754)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _437754)
^  Unify: (274) [user] mfix_vars1(0, _437754)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _437754)
^  Unify: (274) [user] mfix_vars1(0, _437754)
   Call: (275) [system] 0==[_451680, _451686]
^  Redo: (274) [user] mfix_vars1(0, _437754)
^  Unify: (274) [user] mfix_vars1(0, _437754)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _437754)
^  Unify: (274) [user] mfix_vars1(0, _437754)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _437754)
^  Unify: (274) [user] mfix_vars1(0, _437754)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _437754)
^  Unify: (274) [user] mfix_vars1(0, _437754)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _437754)
   Call: (275) [system] 0=_437754
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _437756, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1189, 0], [1189, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; }", 1189, 0], [";; }", 1189, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1189, 0], [";; }", 1189, 0])
   Call: (270) [system] compound_name_arguments(_331928, '$COMMENT', [";; }", 1189, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1189, 0), '$COMMENT', [";; }", 1189, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1189, 0)\=@='$COMMENT'(";; }", 1189, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1189, 0), _326342)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; }", 1189, 0), _487928))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1189, 0), _487928))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1189, 0), _487928))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1189, 0), _487928))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1189, 0), _487928)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1189, 0), _487928)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; }", 1189, 0), _493514))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1189, 0), _493514))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; }", 1189, 0), _493514)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1189, 0), _493514)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; }", 1189, 0), _493514)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1189, 0)\=@='$COMMENT'(";; }", 1189, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1189, 0), _487928)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; }", 1189, 0), _320730))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1189, 0), _320730))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1189, 0), _320730))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1189, 0), _320730))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1189, 0), _320730)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1189, 0), _320730)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; }", 1189, 0), _515834))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1189, 0), _515834))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; }", 1189, 0), _515834)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1189, 0), _515834)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; }", 1189, 0), _515834)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1189, 0)\=@='$COMMENT'(";; }", 1189, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1189, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0)))
   Call: (261) [system] '$COMMENT'(";; }", 1189, 0)\=@='$COMMENT'(";; }", 1189, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1189, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1189, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1189, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1189, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1189, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; }", 1189, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; }", 1189, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; }", 1189, 0), _26764, [], _26766)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; }", 1189, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1189, 0), _26764, [], _26766)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1189, 0), _26764, [], _26766)
   Call: (258) [system] atom('$COMMENT'(";; }", 1189, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1189, 0), _26764, [], _26766)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1189, 0), _26764, [], _26766)
   Call: (258) [system] compound('$COMMENT'(";; }", 1189, 0))
   Exit: (258) [system] compound('$COMMENT'(";; }", 1189, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1189, 0), _36080, _36082)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1189, 0), '$COMMENT', [";; }", 1189, 0])
^  Call: (258) [user] subst_vars([";; }", 1189, 0], _37966, [], _26766)
^  Unify: (258) [user] subst_vars([";; }", 1189, 0], [";; }", 1189, 0], [], [])
   Call: (259) [system] var([";; }", 1189, 0])
^  Redo: (258) [user] subst_vars([";; }", 1189, 0], _37966, [], _26766)
^  Unify: (258) [user] subst_vars([";; }", 1189, 0], [_41702|_41704], [], _26766)
^  Call: (259) [user] subst_vars(";; }", _41702, [], _42642)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
   Call: (260) [system] var(";; }")
^  Redo: (259) [user] subst_vars(";; }", _41702, [], _42642)
^  Unify: (259) [user] subst_vars(";; }", _41702, [], _42642)
   Call: (260) [system] atom(";; }")
^  Redo: (259) [user] subst_vars(";; }", _41702, [], _42642)
^  Unify: (259) [user] subst_vars(";; }", _41702, [], _42642)
   Call: (260) [system] compound(";; }")
^  Redo: (259) [user] subst_vars(";; }", _41702, [], _42642)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Exit: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Call: (259) [user] subst_vars([1189, 0], _41704, [], _26766)
^  Unify: (259) [user] subst_vars([1189, 0], [1189, 0], [], [])
   Call: (260) [system] var([1189, 0])
^  Redo: (259) [user] subst_vars([1189, 0], _41704, [], _26766)
^  Unify: (259) [user] subst_vars([1189, 0], [_57574|_57576], [], _26766)
^  Call: (260) [user] subst_vars(1189, _57574, [], _58514)
^  Unify: (260) [user] subst_vars(1189, 1189, [], [])
   Call: (261) [system] var(1189)
^  Redo: (260) [user] subst_vars(1189, _57574, [], _58514)
^  Unify: (260) [user] subst_vars(1189, _57574, [], _58514)
   Call: (261) [system] atom(1189)
^  Redo: (260) [user] subst_vars(1189, _57574, [], _58514)
^  Unify: (260) [user] subst_vars(1189, _57574, [], _58514)
   Call: (261) [system] compound(1189)
^  Redo: (260) [user] subst_vars(1189, _57574, [], _58514)
^  Unify: (260) [user] subst_vars(1189, 1189, [], [])
^  Exit: (260) [user] subst_vars(1189, 1189, [], [])
^  Call: (260) [user] subst_vars([0], _57576, [], _26766)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _57576, [], _26766)
^  Unify: (260) [user] subst_vars([0], [_73446|_73448], [], _26766)
^  Call: (261) [user] subst_vars(0, _73446, [], _74386)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _73446, [], _74386)
^  Unify: (261) [user] subst_vars(0, _73446, [], _74386)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _73446, [], _74386)
^  Unify: (261) [user] subst_vars(0, _73446, [], _74386)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _73446, [], _74386)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _73448, [], _26766)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _73448, [], _26766)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1189, 0], [1189, 0], [], [])
^  Exit: (258) [user] subst_vars([";; }", 1189, 0], [";; }", 1189, 0], [], [])
   Call: (258) [system] compound_name_arguments(_26764, '$COMMENT', [";; }", 1189, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1189, 0), '$COMMENT', [";; }", 1189, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; }", 1189, 0), '$COMMENT'(";; }", 1189, 0), [], [])
   Call: (257) [system] _96804=metta_file_buffer(+, '$COMMENT'(";; }", 1189, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; }", 1189, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; }", 1189, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1189, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1189, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1189, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1189, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1189, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1189, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1191, 0, 43554, '$COMMENT'(";; Converted:", 1191, 0), '$stream_position'(43554, 1191, 0, 43554)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1191, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1191, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1191, 0), _149522))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1191, 0), _149522))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1191, 0), _149522)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1191, 0), _149522)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1191, 0), _149522)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1191, 0), _149522)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1191, 0), _155134))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1191, 0), _155134))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1191, 0), _155134))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1191, 0), _155134))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1191, 0), _155134)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1191, 0), _155134)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1191, 0), _160720))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1191, 0), _160720))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1191, 0), _160720)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1191, 0), _160720)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1191, 0), _160720)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1191, 0), _160720)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1191, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1191, 0), _160720)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1191, 0), '$VAR'(_168180))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1191, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1191, 0), _160720)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1191, 0), _160720)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1191, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1191, 0), _160720)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1191, 0), _160720)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1191, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1191, 0), _160720)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1191, 0), _160720)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1191, 0)==[_177460, _177466]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1191, 0), _160720)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1191, 0), _160720)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1191, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1191, 0), _160720)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1191, 0), _160720)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1191, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1191, 0), _160720)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1191, 0), _160720)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1191, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1191, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1191, 0), _187662, _187664)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1191, 0), '$COMMENT', [";; Converted:", 1191, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1191, 0], _191404)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1191, 0], _191404)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1191, 0], _191404, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1191, 0], [_194222|_194224], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _194222)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _194222)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _194222)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_198868))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _194222)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _194222)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _194222)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _194222)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _194222)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _194222)
   Call: (273) [system] ";; Converted:"==[_208148, _208154]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _194222)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _194222)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _194222)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _194222)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _194222)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _194222)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _194222)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _194222)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _194222)
   Call: (273) [system] ";; Converted:"=_194222
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1191, 0], _194224, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1191, 0], [_232220|_232222], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1191, _232220)
^  Unify: (273) [user] mfix_vars1(1191, _232220)
   Call: (274) [system] var(1191)
^  Redo: (273) [user] mfix_vars1(1191, _232220)
^  Unify: (273) [user] mfix_vars1(1191, '$VAR'(_236866))
   Call: (274) [system] atom(1191)
^  Redo: (273) [user] mfix_vars1(1191, _232220)
^  Unify: (273) [user] mfix_vars1(1191, _232220)
   Call: (274) [system] 1191==true
^  Redo: (273) [user] mfix_vars1(1191, _232220)
^  Unify: (273) [user] mfix_vars1(1191, _232220)
   Call: (274) [system] 1191==false
^  Redo: (273) [user] mfix_vars1(1191, _232220)
^  Unify: (273) [user] mfix_vars1(1191, _232220)
   Call: (274) [system] 1191==[_246146, _246152]
^  Redo: (273) [user] mfix_vars1(1191, _232220)
^  Unify: (273) [user] mfix_vars1(1191, _232220)
   Call: (274) [system] is_list(1191)
^  Redo: (273) [user] mfix_vars1(1191, _232220)
^  Unify: (273) [user] mfix_vars1(1191, _232220)
   Call: (274) [system] string(1191)
^  Redo: (273) [user] mfix_vars1(1191, _232220)
^  Unify: (273) [user] mfix_vars1(1191, _232220)
   Call: (274) [system] compound(1191)
^  Redo: (273) [user] mfix_vars1(1191, _232220)
^  Unify: (273) [user] mfix_vars1(1191, _232220)
^  Call: (274) [user] symbol(1191)
^  Unify: (274) [user] symbol(1191)
   Call: (275) [system] atom(1191)
   Fail: (275) [system] atom(1191)
^  Fail: (274) [user] symbol(1191)
^  Redo: (273) [user] mfix_vars1(1191, _232220)
   Call: (274) [system] 1191=_232220
   Exit: (274) [system] 1191=1191
^  Exit: (273) [user] mfix_vars1(1191, 1191)
   Call: (273) [apply] apply:maplist_([0], _232222, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_266546|_266548], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _266546)
^  Unify: (274) [user] mfix_vars1(0, _266546)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _266546)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_271192))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _266546)
^  Unify: (274) [user] mfix_vars1(0, _266546)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _266546)
^  Unify: (274) [user] mfix_vars1(0, _266546)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _266546)
^  Unify: (274) [user] mfix_vars1(0, _266546)
   Call: (275) [system] 0==[_280472, _280478]
^  Redo: (274) [user] mfix_vars1(0, _266546)
^  Unify: (274) [user] mfix_vars1(0, _266546)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _266546)
^  Unify: (274) [user] mfix_vars1(0, _266546)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _266546)
^  Unify: (274) [user] mfix_vars1(0, _266546)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _266546)
^  Unify: (274) [user] mfix_vars1(0, _266546)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _266546)
   Call: (275) [system] 0=_266546
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _266548, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1191, 0], [1191, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1191, 0], [";; Converted:", 1191, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1191, 0], [";; Converted:", 1191, 0])
   Call: (270) [system] compound_name_arguments(_160720, '$COMMENT', [";; Converted:", 1191, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1191, 0), '$COMMENT', [";; Converted:", 1191, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1191, 0)\=@='$COMMENT'(";; Converted:", 1191, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1191, 0), _155134)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1191, 0), _316720))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1191, 0), _316720))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1191, 0), _316720))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1191, 0), _316720))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1191, 0), _316720)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1191, 0), _316720)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1191, 0), _322306))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1191, 0), _322306))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1191, 0), _322306)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1191, 0), _322306)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1191, 0), _322306)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1191, 0)\=@='$COMMENT'(";; Converted:", 1191, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1191, 0), _316720)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1191, 0), _149522))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1191, 0), _149522))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1191, 0), _149522))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1191, 0), _149522))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1191, 0), _149522)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1191, 0), _149522)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1191, 0), _344626))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1191, 0), _344626))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1191, 0), _344626)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1191, 0), _344626)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1191, 0), _344626)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1191, 0)\=@='$COMMENT'(";; Converted:", 1191, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1191, 0), _149522)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1191, 0)\=@='$COMMENT'(";; Converted:", 1191, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1191, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1191, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1191, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1191, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1191, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1191, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1191, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1191, 0), _373404, [], _373406)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1191, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1191, 0), _373404, [], _373406)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1191, 0), _373404, [], _373406)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1191, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1191, 0), _373404, [], _373406)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1191, 0), _373404, [], _373406)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1191, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1191, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1191, 0), _382720, _382722)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1191, 0), '$COMMENT', [";; Converted:", 1191, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1191, 0], _384606, [], _373406)
^  Unify: (258) [user] subst_vars([";; Converted:", 1191, 0], [";; Converted:", 1191, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1191, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1191, 0], _384606, [], _373406)
^  Unify: (258) [user] subst_vars([";; Converted:", 1191, 0], [_388342|_388344], [], _373406)
^  Call: (259) [user] subst_vars(";; Converted:", _388342, [], _389282)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _388342, [], _389282)
^  Unify: (259) [user] subst_vars(";; Converted:", _388342, [], _389282)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _388342, [], _389282)
^  Unify: (259) [user] subst_vars(";; Converted:", _388342, [], _389282)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _388342, [], _389282)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1191, 0], _388344, [], _373406)
^  Unify: (259) [user] subst_vars([1191, 0], [1191, 0], [], [])
   Call: (260) [system] var([1191, 0])
^  Redo: (259) [user] subst_vars([1191, 0], _388344, [], _373406)
^  Unify: (259) [user] subst_vars([1191, 0], [_404214|_404216], [], _373406)
^  Call: (260) [user] subst_vars(1191, _404214, [], _405154)
^  Unify: (260) [user] subst_vars(1191, 1191, [], [])
   Call: (261) [system] var(1191)
^  Redo: (260) [user] subst_vars(1191, _404214, [], _405154)
^  Unify: (260) [user] subst_vars(1191, _404214, [], _405154)
   Call: (261) [system] atom(1191)
^  Redo: (260) [user] subst_vars(1191, _404214, [], _405154)
^  Unify: (260) [user] subst_vars(1191, _404214, [], _405154)
   Call: (261) [system] compound(1191)
^  Redo: (260) [user] subst_vars(1191, _404214, [], _405154)
^  Unify: (260) [user] subst_vars(1191, 1191, [], [])
^  Exit: (260) [user] subst_vars(1191, 1191, [], [])
^  Call: (260) [user] subst_vars([0], _404216, [], _373406)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _404216, [], _373406)
^  Unify: (260) [user] subst_vars([0], [_420086|_420088], [], _373406)
^  Call: (261) [user] subst_vars(0, _420086, [], _421026)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _420086, [], _421026)
^  Unify: (261) [user] subst_vars(0, _420086, [], _421026)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _420086, [], _421026)
^  Unify: (261) [user] subst_vars(0, _420086, [], _421026)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _420086, [], _421026)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _420088, [], _373406)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _420088, [], _373406)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1191, 0], [1191, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1191, 0], [";; Converted:", 1191, 0], [], [])
   Call: (258) [system] compound_name_arguments(_373404, '$COMMENT', [";; Converted:", 1191, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1191, 0), '$COMMENT', [";; Converted:", 1191, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1191, 0), '$COMMENT'(";; Converted:", 1191, 0), [], [])
   Call: (257) [system] _443444=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1191, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1191, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1191, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1191, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1191, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1191, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1191, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1191, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1191, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1195, 0, 43742, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$stream_position'(43742, 1195, 0, 43742)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _496164))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _496164))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _496164)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _496164)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _496164)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _496164)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _501776))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _501776))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _501776))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _501776))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _501776)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _501776)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _507362))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _507362))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _507362)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _507362)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _507362)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _507362)
   Call: (270) [system] var('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _507362)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$VAR'(_514822))
   Call: (270) [system] atom('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _507362)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _507362)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _507362)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _507362)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _507362)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _507362)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0)==[_5998, _6004]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _5980)
   Call: (270) [system] is_list('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _5980)
   Call: (270) [system] string('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _5980)
   Call: (270) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
   Exit: (270) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _16166, _16168)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 1195, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;", 1195, 0], _19908)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;", 1195, 0], _19908)
   Call: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;", 1195, 0], _19908, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;", 1195, 0], [_22726|_22728], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _22726)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _22726)
   Call: (273) [system] var(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _22726)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", '$VAR'(_27372))
   Call: (273) [system] atom(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _22726)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _22726)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;"==true
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _22726)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _22726)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;"==false
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _22726)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _22726)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;"==[_36652, _36658]
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _22726)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _22726)
   Call: (273) [system] is_list(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _22726)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _22726)
   Call: (273) [system] string(";;;;;;;;;;;;;;;;;;;;;;")
   Exit: (273) [system] string(";;;;;;;;;;;;;;;;;;;;;;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _22726)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _22726)
   Call: (273) [system] compound(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _22726)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _22726)
^  Call: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;")
^  Unify: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;")
   Call: (274) [system] atom(";;;;;;;;;;;;;;;;;;;;;;")
   Fail: (274) [system] atom(";;;;;;;;;;;;;;;;;;;;;;")
^  Fail: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _22726)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;"=_22726
   Exit: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;"=";;;;;;;;;;;;;;;;;;;;;;"
^  Exit: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;")
   Call: (272) [apply] apply:maplist_([1195, 0], _22728, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1195, 0], [_60724|_60726], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1195, _60724)
^  Unify: (273) [user] mfix_vars1(1195, _60724)
   Call: (274) [system] var(1195)
^  Redo: (273) [user] mfix_vars1(1195, _60724)
^  Unify: (273) [user] mfix_vars1(1195, '$VAR'(_65370))
   Call: (274) [system] atom(1195)
^  Redo: (273) [user] mfix_vars1(1195, _60724)
^  Unify: (273) [user] mfix_vars1(1195, _60724)
   Call: (274) [system] 1195==true
^  Redo: (273) [user] mfix_vars1(1195, _60724)
^  Unify: (273) [user] mfix_vars1(1195, _60724)
   Call: (274) [system] 1195==false
^  Redo: (273) [user] mfix_vars1(1195, _60724)
^  Unify: (273) [user] mfix_vars1(1195, _60724)
   Call: (274) [system] 1195==[_74650, _74656]
^  Redo: (273) [user] mfix_vars1(1195, _60724)
^  Unify: (273) [user] mfix_vars1(1195, _60724)
   Call: (274) [system] is_list(1195)
^  Redo: (273) [user] mfix_vars1(1195, _60724)
^  Unify: (273) [user] mfix_vars1(1195, _60724)
   Call: (274) [system] string(1195)
^  Redo: (273) [user] mfix_vars1(1195, _60724)
^  Unify: (273) [user] mfix_vars1(1195, _60724)
   Call: (274) [system] compound(1195)
^  Redo: (273) [user] mfix_vars1(1195, _60724)
^  Unify: (273) [user] mfix_vars1(1195, _60724)
^  Call: (274) [user] symbol(1195)
^  Unify: (274) [user] symbol(1195)
   Call: (275) [system] atom(1195)
   Fail: (275) [system] atom(1195)
^  Fail: (274) [user] symbol(1195)
^  Redo: (273) [user] mfix_vars1(1195, _60724)
   Call: (274) [system] 1195=_60724
   Exit: (274) [system] 1195=1195
^  Exit: (273) [user] mfix_vars1(1195, 1195)
   Call: (273) [apply] apply:maplist_([0], _60726, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_95050|_95052], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _95050)
^  Unify: (274) [user] mfix_vars1(0, _95050)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _95050)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_99696))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _95050)
^  Unify: (274) [user] mfix_vars1(0, _95050)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _95050)
^  Unify: (274) [user] mfix_vars1(0, _95050)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _95050)
^  Unify: (274) [user] mfix_vars1(0, _95050)
   Call: (275) [system] 0==[_108976, _108982]
^  Redo: (274) [user] mfix_vars1(0, _95050)
^  Unify: (274) [user] mfix_vars1(0, _95050)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _95050)
^  Unify: (274) [user] mfix_vars1(0, _95050)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _95050)
^  Unify: (274) [user] mfix_vars1(0, _95050)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _95050)
^  Unify: (274) [user] mfix_vars1(0, _95050)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _95050)
   Call: (275) [system] 0=_95050
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _95052, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1195, 0], [1195, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;", 1195, 0], [";;;;;;;;;;;;;;;;;;;;;;", 1195, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;", 1195, 0], [";;;;;;;;;;;;;;;;;;;;;;", 1195, 0])
   Call: (270) [system] compound_name_arguments(_5980, '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 1195, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 1195, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _5966)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _145224))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _145224))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _145224))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _145224))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _145224)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _145224)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _150810))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _150810))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _150810)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _150810)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _150810)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _145224)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _5946))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _5946))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _5946))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _5946))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _5946)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _5946)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _173130))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _173130))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _173130)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _173130)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _173130)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _5946)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0)))
   Call: (261) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _201908, [], _201910)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _201908, [], _201910)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _201908, [], _201910)
   Call: (258) [system] atom('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _201908, [], _201910)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _201908, [], _201910)
   Call: (258) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
   Exit: (258) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), _211224, _211226)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 1195, 0])
^  Call: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;", 1195, 0], _213110, [], _201910)
^  Unify: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;", 1195, 0], [";;;;;;;;;;;;;;;;;;;;;;", 1195, 0], [], [])
   Call: (259) [system] var([";;;;;;;;;;;;;;;;;;;;;;", 1195, 0])
^  Redo: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;", 1195, 0], _213110, [], _201910)
^  Unify: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;", 1195, 0], [_216846|_216848], [], _201910)
^  Call: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _216846, [], _217786)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;", [], [])
   Call: (260) [system] var(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _216846, [], _217786)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _216846, [], _217786)
   Call: (260) [system] atom(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _216846, [], _217786)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _216846, [], _217786)
   Call: (260) [system] compound(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _216846, [], _217786)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;", [], [])
^  Exit: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;", [], [])
^  Call: (259) [user] subst_vars([1195, 0], _216848, [], _201910)
^  Unify: (259) [user] subst_vars([1195, 0], [1195, 0], [], [])
   Call: (260) [system] var([1195, 0])
^  Redo: (259) [user] subst_vars([1195, 0], _216848, [], _201910)
^  Unify: (259) [user] subst_vars([1195, 0], [_232718|_232720], [], _201910)
^  Call: (260) [user] subst_vars(1195, _232718, [], _233658)
^  Unify: (260) [user] subst_vars(1195, 1195, [], [])
   Call: (261) [system] var(1195)
^  Redo: (260) [user] subst_vars(1195, _232718, [], _233658)
^  Unify: (260) [user] subst_vars(1195, _232718, [], _233658)
   Call: (261) [system] atom(1195)
^  Redo: (260) [user] subst_vars(1195, _232718, [], _233658)
^  Unify: (260) [user] subst_vars(1195, _232718, [], _233658)
   Call: (261) [system] compound(1195)
^  Redo: (260) [user] subst_vars(1195, _232718, [], _233658)
^  Unify: (260) [user] subst_vars(1195, 1195, [], [])
^  Exit: (260) [user] subst_vars(1195, 1195, [], [])
^  Call: (260) [user] subst_vars([0], _232720, [], _201910)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _232720, [], _201910)
^  Unify: (260) [user] subst_vars([0], [_248590|_248592], [], _201910)
^  Call: (261) [user] subst_vars(0, _248590, [], _249530)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _248590, [], _249530)
^  Unify: (261) [user] subst_vars(0, _248590, [], _249530)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _248590, [], _249530)
^  Unify: (261) [user] subst_vars(0, _248590, [], _249530)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _248590, [], _249530)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _248592, [], _201910)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _248592, [], _201910)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1195, 0], [1195, 0], [], [])
^  Exit: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;", 1195, 0], [";;;;;;;;;;;;;;;;;;;;;;", 1195, 0], [], [])
   Call: (258) [system] compound_name_arguments(_201908, '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 1195, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 1195, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), [], [])
   Call: (257) [system] _271948=metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1195, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1196, 0, 43765, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$stream_position'(43765, 1196, 0, 43765)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _324672))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _324672))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _324672)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _324672)
^  Call: (263) [user] untyped_to_metta('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _324672)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _324672)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _330284))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _330284))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _330284))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _330284))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _330284)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _330284)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _335870))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _335870))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _335870)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _335870)
^  Call: (269) [user] mfix_vars1('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _335870)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _335870)
   Call: (270) [system] var('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _335870)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$VAR'(_343330))
   Call: (270) [system] atom('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _335870)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _335870)
   Call: (270) [system] '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _335870)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _335870)
   Call: (270) [system] '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _335870)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _335870)
   Call: (270) [system] '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0)==[_352610, _352616]
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _335870)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _335870)
   Call: (270) [system] is_list('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _335870)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _335870)
   Call: (270) [system] string('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _335870)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _335870)
   Call: (270) [system] compound('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
   Exit: (270) [system] compound('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _362812, _362814)
   Exit: (270) [system] compound_name_arguments('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT', ["; Test Pragma Interpreter Bare Minimal", 1196, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, ["; Test Pragma Interpreter Bare Minimal", 1196, 0], _366554)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, ["; Test Pragma Interpreter Bare Minimal", 1196, 0], _366554)
   Call: (271) [apply] apply:maplist_(["; Test Pragma Interpreter Bare Minimal", 1196, 0], _366554, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_(["; Test Pragma Interpreter Bare Minimal", 1196, 0], [_369372|_369374], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1("; Test Pragma Interpreter Bare Minimal", _369372)
^  Unify: (272) [user] mfix_vars1("; Test Pragma Interpreter Bare Minimal", _369372)
   Call: (273) [system] var("; Test Pragma Interpreter Bare Minimal")
^  Redo: (272) [user] mfix_vars1("; Test Pragma Interpreter Bare Minimal", _369372)
^  Unify: (272) [user] mfix_vars1("; Test Pragma Interpreter Bare Minimal", '$VAR'(_374018))
   Call: (273) [system] atom("; Test Pragma Interpreter Bare Minimal")
^  Redo: (272) [user] mfix_vars1("; Test Pragma Interpreter Bare Minimal", _369372)
^  Unify: (272) [user] mfix_vars1("; Test Pragma Interpreter Bare Minimal", _369372)
   Call: (273) [system] "; Test Pragma Interpreter Bare Minimal"==true
^  Redo: (272) [user] mfix_vars1("; Test Pragma Interpreter Bare Minimal", _369372)
^  Unify: (272) [user] mfix_vars1("; Test Pragma Interpreter Bare Minimal", _369372)
   Call: (273) [system] "; Test Pragma Interpreter Bare Minimal"==false
^  Redo: (272) [user] mfix_vars1("; Test Pragma Interpreter Bare Minimal", _369372)
^  Unify: (272) [user] mfix_vars1("; Test Pragma Interpreter Bare Minimal", _369372)
   Call: (273) [system] "; Test Pragma Interpreter Bare Minimal"==[_383298, _383304]
^  Redo: (272) [user] mfix_vars1("; Test Pragma Interpreter Bare Minimal", _369372)
^  Unify: (272) [user] mfix_vars1("; Test Pragma Interpreter Bare Minimal", _369372)
   Call: (273) [system] is_list("; Test Pragma Interpreter Bare Minimal")
^  Redo: (272) [user] mfix_vars1("; Test Pragma Interpreter Bare Minimal", _369372)
^  Unify: (272) [user] mfix_vars1("; Test Pragma Interpreter Bare Minimal", _369372)
   Call: (273) [system] string("; Test Pragma Interpreter Bare Minimal")
   Exit: (273) [system] string("; Test Pragma Interpreter Bare Minimal")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1("; Test Pragma Interpreter Bare Minimal", _369372)
^  Unify: (272) [user] mfix_vars1("; Test Pragma Interpreter Bare Minimal", _369372)
   Call: (273) [system] compound("; Test Pragma Interpreter Bare Minimal")
^  Redo: (272) [user] mfix_vars1("; Test Pragma Interpreter Bare Minimal", _369372)
^  Unify: (272) [user] mfix_vars1("; Test Pragma Interpreter Bare Minimal", _369372)
^  Call: (273) [user] symbol("; Test Pragma Interpreter Bare Minimal")
^  Unify: (273) [user] symbol("; Test Pragma Interpreter Bare Minimal")
   Call: (274) [system] atom("; Test Pragma Interpreter Bare Minimal")
   Fail: (274) [system] atom("; Test Pragma Interpreter Bare Minimal")
^  Fail: (273) [user] symbol("; Test Pragma Interpreter Bare Minimal")
^  Redo: (272) [user] mfix_vars1("; Test Pragma Interpreter Bare Minimal", _369372)
   Call: (273) [system] "; Test Pragma Interpreter Bare Minimal"=_369372
   Exit: (273) [system] "; Test Pragma Interpreter Bare Minimal"="; Test Pragma Interpreter Bare Minimal"
^  Exit: (272) [user] mfix_vars1("; Test Pragma Interpreter Bare Minimal", "; Test Pragma Interpreter Bare Minimal")
   Call: (272) [apply] apply:maplist_([1196, 0], _369374, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1196, 0], [_407370|_407372], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1196, _407370)
^  Unify: (273) [user] mfix_vars1(1196, _407370)
   Call: (274) [system] var(1196)
^  Redo: (273) [user] mfix_vars1(1196, _407370)
^  Unify: (273) [user] mfix_vars1(1196, '$VAR'(_412016))
   Call: (274) [system] atom(1196)
^  Redo: (273) [user] mfix_vars1(1196, _407370)
^  Unify: (273) [user] mfix_vars1(1196, _407370)
   Call: (274) [system] 1196==true
^  Redo: (273) [user] mfix_vars1(1196, _407370)
^  Unify: (273) [user] mfix_vars1(1196, _407370)
   Call: (274) [system] 1196==false
^  Redo: (273) [user] mfix_vars1(1196, _407370)
^  Unify: (273) [user] mfix_vars1(1196, _407370)
   Call: (274) [system] 1196==[_421296, _421302]
^  Redo: (273) [user] mfix_vars1(1196, _407370)
^  Unify: (273) [user] mfix_vars1(1196, _407370)
   Call: (274) [system] is_list(1196)
^  Redo: (273) [user] mfix_vars1(1196, _407370)
^  Unify: (273) [user] mfix_vars1(1196, _407370)
   Call: (274) [system] string(1196)
^  Redo: (273) [user] mfix_vars1(1196, _407370)
^  Unify: (273) [user] mfix_vars1(1196, _407370)
   Call: (274) [system] compound(1196)
^  Redo: (273) [user] mfix_vars1(1196, _407370)
^  Unify: (273) [user] mfix_vars1(1196, _407370)
^  Call: (274) [user] symbol(1196)
^  Unify: (274) [user] symbol(1196)
   Call: (275) [system] atom(1196)
   Fail: (275) [system] atom(1196)
^  Fail: (274) [user] symbol(1196)
^  Redo: (273) [user] mfix_vars1(1196, _407370)
   Call: (274) [system] 1196=_407370
   Exit: (274) [system] 1196=1196
^  Exit: (273) [user] mfix_vars1(1196, 1196)
   Call: (273) [apply] apply:maplist_([0], _407372, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_441696|_441698], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _441696)
^  Unify: (274) [user] mfix_vars1(0, _441696)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _441696)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_446342))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _441696)
^  Unify: (274) [user] mfix_vars1(0, _441696)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _441696)
^  Unify: (274) [user] mfix_vars1(0, _441696)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _441696)
^  Unify: (274) [user] mfix_vars1(0, _441696)
   Call: (275) [system] 0==[_455622, _455628]
^  Redo: (274) [user] mfix_vars1(0, _441696)
^  Unify: (274) [user] mfix_vars1(0, _441696)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _441696)
^  Unify: (274) [user] mfix_vars1(0, _441696)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _441696)
^  Unify: (274) [user] mfix_vars1(0, _441696)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _441696)
^  Unify: (274) [user] mfix_vars1(0, _441696)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _441696)
   Call: (275) [system] 0=_441696
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _441698, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1196, 0], [1196, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_(["; Test Pragma Interpreter Bare Minimal", 1196, 0], ["; Test Pragma Interpreter Bare Minimal", 1196, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, ["; Test Pragma Interpreter Bare Minimal", 1196, 0], ["; Test Pragma Interpreter Bare Minimal", 1196, 0])
   Call: (270) [system] compound_name_arguments(_335870, '$COMMENT', ["; Test Pragma Interpreter Bare Minimal", 1196, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT', ["; Test Pragma Interpreter Bare Minimal", 1196, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0)))
   Call: (267) [system] '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0)\=@='$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _330284)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _491870))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _491870))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _491870))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _491870))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _491870)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _491870)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _497456))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _497456))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _497456)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _497456)
^  Call: (269) [user] cons_to_c('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _497456)
^  Unify: (269) [user] cons_to_c('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0)))
   Call: (267) [system] '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0)\=@='$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _491870)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _324672))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _324672))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _324672))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _324672))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _324672)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _324672)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _519776))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _519776))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _519776)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _519776)
^  Call: (269) [user] cons_to_l('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _5988)
^  Unify: (269) [user] cons_to_l('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0)))
   Call: (267) [system] '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0)\=@='$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0)))
   Call: (261) [system] '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0)\=@='$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Call: (257) [user] subst_vars('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _30678, [], _30680)
^  Unify: (257) [user] subst_vars('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), [], [])
   Call: (258) [system] var('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _30678, [], _30680)
^  Unify: (257) [user] subst_vars('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _30678, [], _30680)
   Call: (258) [system] atom('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _30678, [], _30680)
^  Unify: (257) [user] subst_vars('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _30678, [], _30680)
   Call: (258) [system] compound('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
   Exit: (258) [system] compound('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), _39994, _39996)
   Exit: (258) [system] compound_name_arguments('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT', ["; Test Pragma Interpreter Bare Minimal", 1196, 0])
^  Call: (258) [user] subst_vars(["; Test Pragma Interpreter Bare Minimal", 1196, 0], _41880, [], _30680)
^  Unify: (258) [user] subst_vars(["; Test Pragma Interpreter Bare Minimal", 1196, 0], ["; Test Pragma Interpreter Bare Minimal", 1196, 0], [], [])
   Call: (259) [system] var(["; Test Pragma Interpreter Bare Minimal", 1196, 0])
^  Redo: (258) [user] subst_vars(["; Test Pragma Interpreter Bare Minimal", 1196, 0], _41880, [], _30680)
^  Unify: (258) [user] subst_vars(["; Test Pragma Interpreter Bare Minimal", 1196, 0], [_45616|_45618], [], _30680)
^  Call: (259) [user] subst_vars("; Test Pragma Interpreter Bare Minimal", _45616, [], _46556)
^  Unify: (259) [user] subst_vars("; Test Pragma Interpreter Bare Minimal", "; Test Pragma Interpreter Bare Minimal", [], [])
   Call: (260) [system] var("; Test Pragma Interpreter Bare Minimal")
^  Redo: (259) [user] subst_vars("; Test Pragma Interpreter Bare Minimal", _45616, [], _46556)
^  Unify: (259) [user] subst_vars("; Test Pragma Interpreter Bare Minimal", _45616, [], _46556)
   Call: (260) [system] atom("; Test Pragma Interpreter Bare Minimal")
^  Redo: (259) [user] subst_vars("; Test Pragma Interpreter Bare Minimal", _45616, [], _46556)
^  Unify: (259) [user] subst_vars("; Test Pragma Interpreter Bare Minimal", _45616, [], _46556)
   Call: (260) [system] compound("; Test Pragma Interpreter Bare Minimal")
^  Redo: (259) [user] subst_vars("; Test Pragma Interpreter Bare Minimal", _45616, [], _46556)
^  Unify: (259) [user] subst_vars("; Test Pragma Interpreter Bare Minimal", "; Test Pragma Interpreter Bare Minimal", [], [])
^  Exit: (259) [user] subst_vars("; Test Pragma Interpreter Bare Minimal", "; Test Pragma Interpreter Bare Minimal", [], [])
^  Call: (259) [user] subst_vars([1196, 0], _45618, [], _30680)
^  Unify: (259) [user] subst_vars([1196, 0], [1196, 0], [], [])
   Call: (260) [system] var([1196, 0])
^  Redo: (259) [user] subst_vars([1196, 0], _45618, [], _30680)
^  Unify: (259) [user] subst_vars([1196, 0], [_61488|_61490], [], _30680)
^  Call: (260) [user] subst_vars(1196, _61488, [], _62428)
^  Unify: (260) [user] subst_vars(1196, 1196, [], [])
   Call: (261) [system] var(1196)
^  Redo: (260) [user] subst_vars(1196, _61488, [], _62428)
^  Unify: (260) [user] subst_vars(1196, _61488, [], _62428)
   Call: (261) [system] atom(1196)
^  Redo: (260) [user] subst_vars(1196, _61488, [], _62428)
^  Unify: (260) [user] subst_vars(1196, _61488, [], _62428)
   Call: (261) [system] compound(1196)
^  Redo: (260) [user] subst_vars(1196, _61488, [], _62428)
^  Unify: (260) [user] subst_vars(1196, 1196, [], [])
^  Exit: (260) [user] subst_vars(1196, 1196, [], [])
^  Call: (260) [user] subst_vars([0], _61490, [], _30680)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _61490, [], _30680)
^  Unify: (260) [user] subst_vars([0], [_77360|_77362], [], _30680)
^  Call: (261) [user] subst_vars(0, _77360, [], _78300)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _77360, [], _78300)
^  Unify: (261) [user] subst_vars(0, _77360, [], _78300)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _77360, [], _78300)
^  Unify: (261) [user] subst_vars(0, _77360, [], _78300)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _77360, [], _78300)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _77362, [], _30680)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _77362, [], _30680)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1196, 0], [1196, 0], [], [])
^  Exit: (258) [user] subst_vars(["; Test Pragma Interpreter Bare Minimal", 1196, 0], ["; Test Pragma Interpreter Bare Minimal", 1196, 0], [], [])
   Call: (258) [system] compound_name_arguments(_30678, '$COMMENT', ["; Test Pragma Interpreter Bare Minimal", 1196, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT', ["; Test Pragma Interpreter Bare Minimal", 1196, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), [], [])
   Call: (257) [system] _100718=metta_file_buffer(+, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'("; Test Pragma Interpreter Bare Minimal", 1196, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1197, 0, 43804, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$stream_position'(43804, 1197, 0, 43804)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _153438))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _153438))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _153438)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _153438)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _153438)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _153438)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _159050))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _159050))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _159050))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _159050))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _159050)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _159050)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _164636))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _164636))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _164636)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _164636)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _164636)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _164636)
   Call: (270) [system] var('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _164636)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$VAR'(_172096))
   Call: (270) [system] atom('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _164636)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _164636)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _164636)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _164636)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _164636)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _164636)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0)==[_181376, _181382]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _164636)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _164636)
   Call: (270) [system] is_list('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _164636)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _164636)
   Call: (270) [system] string('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _164636)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _164636)
   Call: (270) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
   Exit: (270) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _191578, _191580)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 1197, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;", 1197, 0], _195320)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;", 1197, 0], _195320)
   Call: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;", 1197, 0], _195320, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;", 1197, 0], [_198138|_198140], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _198138)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _198138)
   Call: (273) [system] var(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _198138)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", '$VAR'(_202784))
   Call: (273) [system] atom(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _198138)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _198138)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;"==true
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _198138)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _198138)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;"==false
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _198138)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _198138)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;"==[_212064, _212070]
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _198138)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _198138)
   Call: (273) [system] is_list(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _198138)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _198138)
   Call: (273) [system] string(";;;;;;;;;;;;;;;;;;;;;;")
   Exit: (273) [system] string(";;;;;;;;;;;;;;;;;;;;;;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _198138)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _198138)
   Call: (273) [system] compound(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _198138)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _198138)
^  Call: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;")
^  Unify: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;")
   Call: (274) [system] atom(";;;;;;;;;;;;;;;;;;;;;;")
   Fail: (274) [system] atom(";;;;;;;;;;;;;;;;;;;;;;")
^  Fail: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", _198138)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;"=_198138
   Exit: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;"=";;;;;;;;;;;;;;;;;;;;;;"
^  Exit: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;")
   Call: (272) [apply] apply:maplist_([1197, 0], _198140, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1197, 0], [_236136|_236138], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1197, _236136)
^  Unify: (273) [user] mfix_vars1(1197, _236136)
   Call: (274) [system] var(1197)
^  Redo: (273) [user] mfix_vars1(1197, _236136)
^  Unify: (273) [user] mfix_vars1(1197, '$VAR'(_240782))
   Call: (274) [system] atom(1197)
^  Redo: (273) [user] mfix_vars1(1197, _236136)
^  Unify: (273) [user] mfix_vars1(1197, _236136)
   Call: (274) [system] 1197==true
^  Redo: (273) [user] mfix_vars1(1197, _236136)
^  Unify: (273) [user] mfix_vars1(1197, _236136)
   Call: (274) [system] 1197==false
^  Redo: (273) [user] mfix_vars1(1197, _236136)
^  Unify: (273) [user] mfix_vars1(1197, _236136)
   Call: (274) [system] 1197==[_250062, _250068]
^  Redo: (273) [user] mfix_vars1(1197, _236136)
^  Unify: (273) [user] mfix_vars1(1197, _236136)
   Call: (274) [system] is_list(1197)
^  Redo: (273) [user] mfix_vars1(1197, _236136)
^  Unify: (273) [user] mfix_vars1(1197, _236136)
   Call: (274) [system] string(1197)
^  Redo: (273) [user] mfix_vars1(1197, _236136)
^  Unify: (273) [user] mfix_vars1(1197, _236136)
   Call: (274) [system] compound(1197)
^  Redo: (273) [user] mfix_vars1(1197, _236136)
^  Unify: (273) [user] mfix_vars1(1197, _236136)
^  Call: (274) [user] symbol(1197)
^  Unify: (274) [user] symbol(1197)
   Call: (275) [system] atom(1197)
   Fail: (275) [system] atom(1197)
^  Fail: (274) [user] symbol(1197)
^  Redo: (273) [user] mfix_vars1(1197, _236136)
   Call: (274) [system] 1197=_236136
   Exit: (274) [system] 1197=1197
^  Exit: (273) [user] mfix_vars1(1197, 1197)
   Call: (273) [apply] apply:maplist_([0], _236138, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_270462|_270464], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _270462)
^  Unify: (274) [user] mfix_vars1(0, _270462)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _270462)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_275108))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _270462)
^  Unify: (274) [user] mfix_vars1(0, _270462)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _270462)
^  Unify: (274) [user] mfix_vars1(0, _270462)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _270462)
^  Unify: (274) [user] mfix_vars1(0, _270462)
   Call: (275) [system] 0==[_284388, _284394]
^  Redo: (274) [user] mfix_vars1(0, _270462)
^  Unify: (274) [user] mfix_vars1(0, _270462)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _270462)
^  Unify: (274) [user] mfix_vars1(0, _270462)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _270462)
^  Unify: (274) [user] mfix_vars1(0, _270462)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _270462)
^  Unify: (274) [user] mfix_vars1(0, _270462)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _270462)
   Call: (275) [system] 0=_270462
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _270464, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1197, 0], [1197, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;", 1197, 0], [";;;;;;;;;;;;;;;;;;;;;;", 1197, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;", 1197, 0], [";;;;;;;;;;;;;;;;;;;;;;", 1197, 0])
   Call: (270) [system] compound_name_arguments(_164636, '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 1197, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 1197, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _159050)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _320636))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _320636))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _320636))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _320636))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _320636)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _320636)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _326222))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _326222))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _326222)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _326222)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _326222)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _320636)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _153438))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _153438))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _153438))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _153438))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _153438)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _153438)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _348542))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _348542))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _348542)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _348542)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _348542)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _153438)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0)))
   Call: (261) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _377320, [], _377322)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _377320, [], _377322)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _377320, [], _377322)
   Call: (258) [system] atom('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _377320, [], _377322)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _377320, [], _377322)
   Call: (258) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
   Exit: (258) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), _386636, _386638)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 1197, 0])
^  Call: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;", 1197, 0], _388522, [], _377322)
^  Unify: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;", 1197, 0], [";;;;;;;;;;;;;;;;;;;;;;", 1197, 0], [], [])
   Call: (259) [system] var([";;;;;;;;;;;;;;;;;;;;;;", 1197, 0])
^  Redo: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;", 1197, 0], _388522, [], _377322)
^  Unify: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;", 1197, 0], [_392258|_392260], [], _377322)
^  Call: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _392258, [], _393198)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;", [], [])
   Call: (260) [system] var(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _392258, [], _393198)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _392258, [], _393198)
   Call: (260) [system] atom(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _392258, [], _393198)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _392258, [], _393198)
   Call: (260) [system] compound(";;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", _392258, [], _393198)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;", [], [])
^  Exit: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;", [], [])
^  Call: (259) [user] subst_vars([1197, 0], _392260, [], _377322)
^  Unify: (259) [user] subst_vars([1197, 0], [1197, 0], [], [])
   Call: (260) [system] var([1197, 0])
^  Redo: (259) [user] subst_vars([1197, 0], _392260, [], _377322)
^  Unify: (259) [user] subst_vars([1197, 0], [_408130|_408132], [], _377322)
^  Call: (260) [user] subst_vars(1197, _408130, [], _409070)
^  Unify: (260) [user] subst_vars(1197, 1197, [], [])
   Call: (261) [system] var(1197)
^  Redo: (260) [user] subst_vars(1197, _408130, [], _409070)
^  Unify: (260) [user] subst_vars(1197, _408130, [], _409070)
   Call: (261) [system] atom(1197)
^  Redo: (260) [user] subst_vars(1197, _408130, [], _409070)
^  Unify: (260) [user] subst_vars(1197, _408130, [], _409070)
   Call: (261) [system] compound(1197)
^  Redo: (260) [user] subst_vars(1197, _408130, [], _409070)
^  Unify: (260) [user] subst_vars(1197, 1197, [], [])
^  Exit: (260) [user] subst_vars(1197, 1197, [], [])
^  Call: (260) [user] subst_vars([0], _408132, [], _377322)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _408132, [], _377322)
^  Unify: (260) [user] subst_vars([0], [_424002|_424004], [], _377322)
^  Call: (261) [user] subst_vars(0, _424002, [], _424942)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _424002, [], _424942)
^  Unify: (261) [user] subst_vars(0, _424002, [], _424942)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _424002, [], _424942)
^  Unify: (261) [user] subst_vars(0, _424002, [], _424942)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _424002, [], _424942)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _424004, [], _377322)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _424004, [], _377322)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1197, 0], [1197, 0], [], [])
^  Exit: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;", 1197, 0], [";;;;;;;;;;;;;;;;;;;;;;", 1197, 0], [], [])
   Call: (258) [system] compound_name_arguments(_377320, '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 1197, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;", 1197, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), [], [])
   Call: (257) [system] _447360=metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;", 1197, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1200, 0, 43829, '$COMMENT'(";; Original:", 1200, 0), '$stream_position'(43829, 1200, 0, 43829)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1200, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1200, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1200, 0), _500078))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1200, 0), _500078))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1200, 0), _500078)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1200, 0), _500078)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1200, 0), _500078)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1200, 0), _500078)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1200, 0), _505690))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1200, 0), _505690))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1200, 0), _505690))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1200, 0), _505690))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1200, 0), _505690)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1200, 0), _505690)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1200, 0), _511276))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1200, 0), _511276))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1200, 0), _511276)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1200, 0), _511276)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1200, 0), _511276)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1200, 0), _511276)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1200, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1200, 0), _511276)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1200, 0), '$VAR'(_518736))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1200, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1200, 0), _511276)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1200, 0), _511276)
   Call: (270) [system] '$COMMENT'(";; Original:", 1200, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1200, 0), _5978)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1200, 0), _5978)
   Call: (270) [system] '$COMMENT'(";; Original:", 1200, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1200, 0), _5978)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1200, 0), _5978)
   Call: (270) [system] '$COMMENT'(";; Original:", 1200, 0)==[_10060, _10066]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1200, 0), _5978)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1200, 0), _5978)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1200, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1200, 0), _5978)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1200, 0), _5978)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1200, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1200, 0), _5978)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1200, 0), _5978)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1200, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1200, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1200, 0), _20262, _20264)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1200, 0), '$COMMENT', [";; Original:", 1200, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1200, 0], _24004)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1200, 0], _24004)
   Call: (271) [apply] apply:maplist_([";; Original:", 1200, 0], _24004, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1200, 0], [_26822|_26824], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _26822)
^  Unify: (272) [user] mfix_vars1(";; Original:", _26822)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _26822)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_31468))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _26822)
^  Unify: (272) [user] mfix_vars1(";; Original:", _26822)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _26822)
^  Unify: (272) [user] mfix_vars1(";; Original:", _26822)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _26822)
^  Unify: (272) [user] mfix_vars1(";; Original:", _26822)
   Call: (273) [system] ";; Original:"==[_40748, _40754]
^  Redo: (272) [user] mfix_vars1(";; Original:", _26822)
^  Unify: (272) [user] mfix_vars1(";; Original:", _26822)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _26822)
^  Unify: (272) [user] mfix_vars1(";; Original:", _26822)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _26822)
^  Unify: (272) [user] mfix_vars1(";; Original:", _26822)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _26822)
^  Unify: (272) [user] mfix_vars1(";; Original:", _26822)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _26822)
   Call: (273) [system] ";; Original:"=_26822
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1200, 0], _26824, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1200, 0], [_64820|_64822], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1200, _64820)
^  Unify: (273) [user] mfix_vars1(1200, _64820)
   Call: (274) [system] var(1200)
^  Redo: (273) [user] mfix_vars1(1200, _64820)
^  Unify: (273) [user] mfix_vars1(1200, '$VAR'(_69466))
   Call: (274) [system] atom(1200)
^  Redo: (273) [user] mfix_vars1(1200, _64820)
^  Unify: (273) [user] mfix_vars1(1200, _64820)
   Call: (274) [system] 1200==true
^  Redo: (273) [user] mfix_vars1(1200, _64820)
^  Unify: (273) [user] mfix_vars1(1200, _64820)
   Call: (274) [system] 1200==false
^  Redo: (273) [user] mfix_vars1(1200, _64820)
^  Unify: (273) [user] mfix_vars1(1200, _64820)
   Call: (274) [system] 1200==[_78746, _78752]
^  Redo: (273) [user] mfix_vars1(1200, _64820)
^  Unify: (273) [user] mfix_vars1(1200, _64820)
   Call: (274) [system] is_list(1200)
^  Redo: (273) [user] mfix_vars1(1200, _64820)
^  Unify: (273) [user] mfix_vars1(1200, _64820)
   Call: (274) [system] string(1200)
^  Redo: (273) [user] mfix_vars1(1200, _64820)
^  Unify: (273) [user] mfix_vars1(1200, _64820)
   Call: (274) [system] compound(1200)
^  Redo: (273) [user] mfix_vars1(1200, _64820)
^  Unify: (273) [user] mfix_vars1(1200, _64820)
^  Call: (274) [user] symbol(1200)
^  Unify: (274) [user] symbol(1200)
   Call: (275) [system] atom(1200)
   Fail: (275) [system] atom(1200)
^  Fail: (274) [user] symbol(1200)
^  Redo: (273) [user] mfix_vars1(1200, _64820)
   Call: (274) [system] 1200=_64820
   Exit: (274) [system] 1200=1200
^  Exit: (273) [user] mfix_vars1(1200, 1200)
   Call: (273) [apply] apply:maplist_([0], _64822, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_99146|_99148], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _99146)
^  Unify: (274) [user] mfix_vars1(0, _99146)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _99146)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_103792))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _99146)
^  Unify: (274) [user] mfix_vars1(0, _99146)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _99146)
^  Unify: (274) [user] mfix_vars1(0, _99146)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _99146)
^  Unify: (274) [user] mfix_vars1(0, _99146)
   Call: (275) [system] 0==[_113072, _113078]
^  Redo: (274) [user] mfix_vars1(0, _99146)
^  Unify: (274) [user] mfix_vars1(0, _99146)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _99146)
^  Unify: (274) [user] mfix_vars1(0, _99146)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _99146)
^  Unify: (274) [user] mfix_vars1(0, _99146)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _99146)
^  Unify: (274) [user] mfix_vars1(0, _99146)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _99146)
   Call: (275) [system] 0=_99146
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _99148, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1200, 0], [1200, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1200, 0], [";; Original:", 1200, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1200, 0], [";; Original:", 1200, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";; Original:", 1200, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1200, 0), '$COMMENT', [";; Original:", 1200, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1200, 0)\=@='$COMMENT'(";; Original:", 1200, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1200, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1200, 0), _149320))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1200, 0), _149320))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1200, 0), _149320))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1200, 0), _149320))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1200, 0), _149320)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1200, 0), _149320)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1200, 0), _154906))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1200, 0), _154906))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1200, 0), _154906)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1200, 0), _154906)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1200, 0), _154906)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1200, 0)\=@='$COMMENT'(";; Original:", 1200, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1200, 0), _149320)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1200, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1200, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1200, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1200, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1200, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1200, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1200, 0), _177226))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1200, 0), _177226))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1200, 0), _177226)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1200, 0), _177226)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1200, 0), _177226)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1200, 0)\=@='$COMMENT'(";; Original:", 1200, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1200, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1200, 0)\=@='$COMMENT'(";; Original:", 1200, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1200, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1200, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1200, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1200, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1200, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1200, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1200, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1200, 0), _206004, [], _206006)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1200, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1200, 0), _206004, [], _206006)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1200, 0), _206004, [], _206006)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1200, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1200, 0), _206004, [], _206006)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1200, 0), _206004, [], _206006)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1200, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1200, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1200, 0), _215320, _215322)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1200, 0), '$COMMENT', [";; Original:", 1200, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1200, 0], _217206, [], _206006)
^  Unify: (258) [user] subst_vars([";; Original:", 1200, 0], [";; Original:", 1200, 0], [], [])
   Call: (259) [system] var([";; Original:", 1200, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1200, 0], _217206, [], _206006)
^  Unify: (258) [user] subst_vars([";; Original:", 1200, 0], [_220942|_220944], [], _206006)
^  Call: (259) [user] subst_vars(";; Original:", _220942, [], _221882)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _220942, [], _221882)
^  Unify: (259) [user] subst_vars(";; Original:", _220942, [], _221882)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _220942, [], _221882)
^  Unify: (259) [user] subst_vars(";; Original:", _220942, [], _221882)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _220942, [], _221882)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1200, 0], _220944, [], _206006)
^  Unify: (259) [user] subst_vars([1200, 0], [1200, 0], [], [])
   Call: (260) [system] var([1200, 0])
^  Redo: (259) [user] subst_vars([1200, 0], _220944, [], _206006)
^  Unify: (259) [user] subst_vars([1200, 0], [_236814|_236816], [], _206006)
^  Call: (260) [user] subst_vars(1200, _236814, [], _237754)
^  Unify: (260) [user] subst_vars(1200, 1200, [], [])
   Call: (261) [system] var(1200)
^  Redo: (260) [user] subst_vars(1200, _236814, [], _237754)
^  Unify: (260) [user] subst_vars(1200, _236814, [], _237754)
   Call: (261) [system] atom(1200)
^  Redo: (260) [user] subst_vars(1200, _236814, [], _237754)
^  Unify: (260) [user] subst_vars(1200, _236814, [], _237754)
   Call: (261) [system] compound(1200)
^  Redo: (260) [user] subst_vars(1200, _236814, [], _237754)
^  Unify: (260) [user] subst_vars(1200, 1200, [], [])
^  Exit: (260) [user] subst_vars(1200, 1200, [], [])
^  Call: (260) [user] subst_vars([0], _236816, [], _206006)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _236816, [], _206006)
^  Unify: (260) [user] subst_vars([0], [_252686|_252688], [], _206006)
^  Call: (261) [user] subst_vars(0, _252686, [], _253626)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _252686, [], _253626)
^  Unify: (261) [user] subst_vars(0, _252686, [], _253626)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _252686, [], _253626)
^  Unify: (261) [user] subst_vars(0, _252686, [], _253626)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _252686, [], _253626)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _252688, [], _206006)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _252688, [], _206006)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1200, 0], [1200, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1200, 0], [";; Original:", 1200, 0], [], [])
   Call: (258) [system] compound_name_arguments(_206004, '$COMMENT', [";; Original:", 1200, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1200, 0), '$COMMENT', [";; Original:", 1200, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1200, 0), '$COMMENT'(";; Original:", 1200, 0), [], [])
   Call: (257) [system] _276044=metta_file_buffer(+, '$COMMENT'(";; Original:", 1200, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1200, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1200, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1200, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1200, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1200, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1200, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1200, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1200, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1201, 0, 43842, '$COMMENT'(";; #[test]", 1201, 0), '$stream_position'(43842, 1201, 0, 43842)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1201, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1201, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; #[test]", 1201, 0), _328762))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 1201, 0), _328762))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; #[test]", 1201, 0), _328762)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 1201, 0), _328762)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1201, 0), _328762)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1201, 0), _328762)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; #[test]", 1201, 0), _334374))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1201, 0), _334374))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1201, 0), _334374))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1201, 0), _334374))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1201, 0), _334374)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1201, 0), _334374)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; #[test]", 1201, 0), _339960))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 1201, 0), _339960))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; #[test]", 1201, 0), _339960)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 1201, 0), _339960)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1201, 0), _339960)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1201, 0), _339960)
   Call: (270) [system] var('$COMMENT'(";; #[test]", 1201, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1201, 0), _339960)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1201, 0), '$VAR'(_347420))
   Call: (270) [system] atom('$COMMENT'(";; #[test]", 1201, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1201, 0), _339960)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1201, 0), _339960)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1201, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1201, 0), _339960)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1201, 0), _339960)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1201, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1201, 0), _339960)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1201, 0), _339960)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1201, 0)==[_356700, _356706]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1201, 0), _339960)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1201, 0), _339960)
   Call: (270) [system] is_list('$COMMENT'(";; #[test]", 1201, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1201, 0), _339960)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1201, 0), _339960)
   Call: (270) [system] string('$COMMENT'(";; #[test]", 1201, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1201, 0), _339960)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1201, 0), _339960)
   Call: (270) [system] compound('$COMMENT'(";; #[test]", 1201, 0))
   Exit: (270) [system] compound('$COMMENT'(";; #[test]", 1201, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1201, 0), _366902, _366904)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1201, 0), '$COMMENT', [";; #[test]", 1201, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; #[test]", 1201, 0], _370644)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 1201, 0], _370644)
   Call: (271) [apply] apply:maplist_([";; #[test]", 1201, 0], _370644, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; #[test]", 1201, 0], [_373462|_373464], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; #[test]", _373462)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _373462)
   Call: (273) [system] var(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _373462)
^  Unify: (272) [user] mfix_vars1(";; #[test]", '$VAR'(_378108))
   Call: (273) [system] atom(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _373462)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _373462)
   Call: (273) [system] ";; #[test]"==true
^  Redo: (272) [user] mfix_vars1(";; #[test]", _373462)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _373462)
   Call: (273) [system] ";; #[test]"==false
^  Redo: (272) [user] mfix_vars1(";; #[test]", _373462)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _373462)
   Call: (273) [system] ";; #[test]"==[_387388, _387394]
^  Redo: (272) [user] mfix_vars1(";; #[test]", _373462)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _373462)
   Call: (273) [system] is_list(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _373462)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _373462)
   Call: (273) [system] string(";; #[test]")
   Exit: (273) [system] string(";; #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; #[test]", _373462)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _373462)
   Call: (273) [system] compound(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _373462)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _373462)
^  Call: (273) [user] symbol(";; #[test]")
^  Unify: (273) [user] symbol(";; #[test]")
   Call: (274) [system] atom(";; #[test]")
   Fail: (274) [system] atom(";; #[test]")
^  Fail: (273) [user] symbol(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _373462)
   Call: (273) [system] ";; #[test]"=_373462
   Exit: (273) [system] ";; #[test]"=";; #[test]"
^  Exit: (272) [user] mfix_vars1(";; #[test]", ";; #[test]")
   Call: (272) [apply] apply:maplist_([1201, 0], _373464, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1201, 0], [_411460|_411462], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1201, _411460)
^  Unify: (273) [user] mfix_vars1(1201, _411460)
   Call: (274) [system] var(1201)
^  Redo: (273) [user] mfix_vars1(1201, _411460)
^  Unify: (273) [user] mfix_vars1(1201, '$VAR'(_416106))
   Call: (274) [system] atom(1201)
^  Redo: (273) [user] mfix_vars1(1201, _411460)
^  Unify: (273) [user] mfix_vars1(1201, _411460)
   Call: (274) [system] 1201==true
^  Redo: (273) [user] mfix_vars1(1201, _411460)
^  Unify: (273) [user] mfix_vars1(1201, _411460)
   Call: (274) [system] 1201==false
^  Redo: (273) [user] mfix_vars1(1201, _411460)
^  Unify: (273) [user] mfix_vars1(1201, _411460)
   Call: (274) [system] 1201==[_425386, _425392]
^  Redo: (273) [user] mfix_vars1(1201, _411460)
^  Unify: (273) [user] mfix_vars1(1201, _411460)
   Call: (274) [system] is_list(1201)
^  Redo: (273) [user] mfix_vars1(1201, _411460)
^  Unify: (273) [user] mfix_vars1(1201, _411460)
   Call: (274) [system] string(1201)
^  Redo: (273) [user] mfix_vars1(1201, _411460)
^  Unify: (273) [user] mfix_vars1(1201, _411460)
   Call: (274) [system] compound(1201)
^  Redo: (273) [user] mfix_vars1(1201, _411460)
^  Unify: (273) [user] mfix_vars1(1201, _411460)
^  Call: (274) [user] symbol(1201)
^  Unify: (274) [user] symbol(1201)
   Call: (275) [system] atom(1201)
   Fail: (275) [system] atom(1201)
^  Fail: (274) [user] symbol(1201)
^  Redo: (273) [user] mfix_vars1(1201, _411460)
   Call: (274) [system] 1201=_411460
   Exit: (274) [system] 1201=1201
^  Exit: (273) [user] mfix_vars1(1201, 1201)
   Call: (273) [apply] apply:maplist_([0], _411462, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_445786|_445788], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _445786)
^  Unify: (274) [user] mfix_vars1(0, _445786)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _445786)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_450432))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _445786)
^  Unify: (274) [user] mfix_vars1(0, _445786)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _445786)
^  Unify: (274) [user] mfix_vars1(0, _445786)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _445786)
^  Unify: (274) [user] mfix_vars1(0, _445786)
   Call: (275) [system] 0==[_459712, _459718]
^  Redo: (274) [user] mfix_vars1(0, _445786)
^  Unify: (274) [user] mfix_vars1(0, _445786)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _445786)
^  Unify: (274) [user] mfix_vars1(0, _445786)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _445786)
^  Unify: (274) [user] mfix_vars1(0, _445786)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _445786)
^  Unify: (274) [user] mfix_vars1(0, _445786)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _445786)
   Call: (275) [system] 0=_445786
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _445788, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1201, 0], [1201, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; #[test]", 1201, 0], [";; #[test]", 1201, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 1201, 0], [";; #[test]", 1201, 0])
   Call: (270) [system] compound_name_arguments(_339960, '$COMMENT', [";; #[test]", 1201, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1201, 0), '$COMMENT', [";; #[test]", 1201, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1201, 0)\=@='$COMMENT'(";; #[test]", 1201, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1201, 0), _334374)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; #[test]", 1201, 0), _495960))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1201, 0), _495960))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1201, 0), _495960))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1201, 0), _495960))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1201, 0), _495960)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1201, 0), _495960)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; #[test]", 1201, 0), _501546))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 1201, 0), _501546))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; #[test]", 1201, 0), _501546)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 1201, 0), _501546)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1201, 0), _501546)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1201, 0)\=@='$COMMENT'(";; #[test]", 1201, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1201, 0), _495960)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; #[test]", 1201, 0), _328762))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1201, 0), _328762))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1201, 0), _328762))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1201, 0), _328762))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1201, 0), _328762)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1201, 0), _328762)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; #[test]", 1201, 0), _5984))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 1201, 0), _5984))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; #[test]", 1201, 0), _5984)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 1201, 0), _5984)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1201, 0), _5984)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1201, 0)\=@='$COMMENT'(";; #[test]", 1201, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1201, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0)))
   Call: (261) [system] '$COMMENT'(";; #[test]", 1201, 0)\=@='$COMMENT'(";; #[test]", 1201, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1201, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1201, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1201, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1201, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1201, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1201, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1201, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1201, 0), _34620, [], _34622)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; #[test]", 1201, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1201, 0), _34620, [], _34622)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1201, 0), _34620, [], _34622)
   Call: (258) [system] atom('$COMMENT'(";; #[test]", 1201, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1201, 0), _34620, [], _34622)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1201, 0), _34620, [], _34622)
   Call: (258) [system] compound('$COMMENT'(";; #[test]", 1201, 0))
   Exit: (258) [system] compound('$COMMENT'(";; #[test]", 1201, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1201, 0), _43936, _43938)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1201, 0), '$COMMENT', [";; #[test]", 1201, 0])
^  Call: (258) [user] subst_vars([";; #[test]", 1201, 0], _45822, [], _34622)
^  Unify: (258) [user] subst_vars([";; #[test]", 1201, 0], [";; #[test]", 1201, 0], [], [])
   Call: (259) [system] var([";; #[test]", 1201, 0])
^  Redo: (258) [user] subst_vars([";; #[test]", 1201, 0], _45822, [], _34622)
^  Unify: (258) [user] subst_vars([";; #[test]", 1201, 0], [_49558|_49560], [], _34622)
^  Call: (259) [user] subst_vars(";; #[test]", _49558, [], _50498)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
   Call: (260) [system] var(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _49558, [], _50498)
^  Unify: (259) [user] subst_vars(";; #[test]", _49558, [], _50498)
   Call: (260) [system] atom(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _49558, [], _50498)
^  Unify: (259) [user] subst_vars(";; #[test]", _49558, [], _50498)
   Call: (260) [system] compound(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _49558, [], _50498)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Exit: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Call: (259) [user] subst_vars([1201, 0], _49560, [], _34622)
^  Unify: (259) [user] subst_vars([1201, 0], [1201, 0], [], [])
   Call: (260) [system] var([1201, 0])
^  Redo: (259) [user] subst_vars([1201, 0], _49560, [], _34622)
^  Unify: (259) [user] subst_vars([1201, 0], [_65430|_65432], [], _34622)
^  Call: (260) [user] subst_vars(1201, _65430, [], _66370)
^  Unify: (260) [user] subst_vars(1201, 1201, [], [])
   Call: (261) [system] var(1201)
^  Redo: (260) [user] subst_vars(1201, _65430, [], _66370)
^  Unify: (260) [user] subst_vars(1201, _65430, [], _66370)
   Call: (261) [system] atom(1201)
^  Redo: (260) [user] subst_vars(1201, _65430, [], _66370)
^  Unify: (260) [user] subst_vars(1201, _65430, [], _66370)
   Call: (261) [system] compound(1201)
^  Redo: (260) [user] subst_vars(1201, _65430, [], _66370)
^  Unify: (260) [user] subst_vars(1201, 1201, [], [])
^  Exit: (260) [user] subst_vars(1201, 1201, [], [])
^  Call: (260) [user] subst_vars([0], _65432, [], _34622)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _65432, [], _34622)
^  Unify: (260) [user] subst_vars([0], [_81302|_81304], [], _34622)
^  Call: (261) [user] subst_vars(0, _81302, [], _82242)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _81302, [], _82242)
^  Unify: (261) [user] subst_vars(0, _81302, [], _82242)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _81302, [], _82242)
^  Unify: (261) [user] subst_vars(0, _81302, [], _82242)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _81302, [], _82242)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _81304, [], _34622)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _81304, [], _34622)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1201, 0], [1201, 0], [], [])
^  Exit: (258) [user] subst_vars([";; #[test]", 1201, 0], [";; #[test]", 1201, 0], [], [])
   Call: (258) [system] compound_name_arguments(_34620, '$COMMENT', [";; #[test]", 1201, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1201, 0), '$COMMENT', [";; #[test]", 1201, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1201, 0), '$COMMENT'(";; #[test]", 1201, 0), [], [])
   Call: (257) [system] _104660=metta_file_buffer(+, '$COMMENT'(";; #[test]", 1201, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; #[test]", 1201, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; #[test]", 1201, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 1201, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 1201, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1201, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1201, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1201, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1201, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1202, 0, 43853, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$stream_position'(43853, 1202, 0, 43853)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _157386))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _157386))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _157386)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _157386)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _157386)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _157386)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _162998))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _162998))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _162998))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _162998))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _162998)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _162998)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _168584))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _168584))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _168584)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _168584)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _168584)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _168584)
   Call: (270) [system] var('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _168584)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$VAR'(_176044))
   Call: (270) [system] atom('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _168584)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _168584)
   Call: (270) [system] '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _168584)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _168584)
   Call: (270) [system] '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _168584)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _168584)
   Call: (270) [system] '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0)==[_185324, _185330]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _168584)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _168584)
   Call: (270) [system] is_list('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _168584)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _168584)
   Call: (270) [system] string('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _168584)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _168584)
   Call: (270) [system] compound('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
   Exit: (270) [system] compound('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _195526, _195528)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT', [";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0], _199268)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0], _199268)
   Call: (271) [apply] apply:maplist_([";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0], _199268, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0], [_202086|_202088], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; fn test_pragma_interpreter_bare_minimal() {", _202086)
^  Unify: (272) [user] mfix_vars1(";; fn test_pragma_interpreter_bare_minimal() {", _202086)
   Call: (273) [system] var(";; fn test_pragma_interpreter_bare_minimal() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_pragma_interpreter_bare_minimal() {", _202086)
^  Unify: (272) [user] mfix_vars1(";; fn test_pragma_interpreter_bare_minimal() {", '$VAR'(_206732))
   Call: (273) [system] atom(";; fn test_pragma_interpreter_bare_minimal() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_pragma_interpreter_bare_minimal() {", _202086)
^  Unify: (272) [user] mfix_vars1(";; fn test_pragma_interpreter_bare_minimal() {", _202086)
   Call: (273) [system] ";; fn test_pragma_interpreter_bare_minimal() {"==true
^  Redo: (272) [user] mfix_vars1(";; fn test_pragma_interpreter_bare_minimal() {", _202086)
^  Unify: (272) [user] mfix_vars1(";; fn test_pragma_interpreter_bare_minimal() {", _202086)
   Call: (273) [system] ";; fn test_pragma_interpreter_bare_minimal() {"==false
^  Redo: (272) [user] mfix_vars1(";; fn test_pragma_interpreter_bare_minimal() {", _202086)
^  Unify: (272) [user] mfix_vars1(";; fn test_pragma_interpreter_bare_minimal() {", _202086)
   Call: (273) [system] ";; fn test_pragma_interpreter_bare_minimal() {"==[_216012, _216018]
^  Redo: (272) [user] mfix_vars1(";; fn test_pragma_interpreter_bare_minimal() {", _202086)
^  Unify: (272) [user] mfix_vars1(";; fn test_pragma_interpreter_bare_minimal() {", _202086)
   Call: (273) [system] is_list(";; fn test_pragma_interpreter_bare_minimal() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_pragma_interpreter_bare_minimal() {", _202086)
^  Unify: (272) [user] mfix_vars1(";; fn test_pragma_interpreter_bare_minimal() {", _202086)
   Call: (273) [system] string(";; fn test_pragma_interpreter_bare_minimal() {")
   Exit: (273) [system] string(";; fn test_pragma_interpreter_bare_minimal() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; fn test_pragma_interpreter_bare_minimal() {", _202086)
^  Unify: (272) [user] mfix_vars1(";; fn test_pragma_interpreter_bare_minimal() {", _202086)
   Call: (273) [system] compound(";; fn test_pragma_interpreter_bare_minimal() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_pragma_interpreter_bare_minimal() {", _202086)
^  Unify: (272) [user] mfix_vars1(";; fn test_pragma_interpreter_bare_minimal() {", _202086)
^  Call: (273) [user] symbol(";; fn test_pragma_interpreter_bare_minimal() {")
^  Unify: (273) [user] symbol(";; fn test_pragma_interpreter_bare_minimal() {")
   Call: (274) [system] atom(";; fn test_pragma_interpreter_bare_minimal() {")
   Fail: (274) [system] atom(";; fn test_pragma_interpreter_bare_minimal() {")
^  Fail: (273) [user] symbol(";; fn test_pragma_interpreter_bare_minimal() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_pragma_interpreter_bare_minimal() {", _202086)
   Call: (273) [system] ";; fn test_pragma_interpreter_bare_minimal() {"=_202086
   Exit: (273) [system] ";; fn test_pragma_interpreter_bare_minimal() {"=";; fn test_pragma_interpreter_bare_minimal() {"
^  Exit: (272) [user] mfix_vars1(";; fn test_pragma_interpreter_bare_minimal() {", ";; fn test_pragma_interpreter_bare_minimal() {")
   Call: (272) [apply] apply:maplist_([1202, 0], _202088, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1202, 0], [_240084|_240086], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1202, _240084)
^  Unify: (273) [user] mfix_vars1(1202, _240084)
   Call: (274) [system] var(1202)
^  Redo: (273) [user] mfix_vars1(1202, _240084)
^  Unify: (273) [user] mfix_vars1(1202, '$VAR'(_244730))
   Call: (274) [system] atom(1202)
^  Redo: (273) [user] mfix_vars1(1202, _240084)
^  Unify: (273) [user] mfix_vars1(1202, _240084)
   Call: (274) [system] 1202==true
^  Redo: (273) [user] mfix_vars1(1202, _240084)
^  Unify: (273) [user] mfix_vars1(1202, _240084)
   Call: (274) [system] 1202==false
^  Redo: (273) [user] mfix_vars1(1202, _240084)
^  Unify: (273) [user] mfix_vars1(1202, _240084)
   Call: (274) [system] 1202==[_254010, _254016]
^  Redo: (273) [user] mfix_vars1(1202, _240084)
^  Unify: (273) [user] mfix_vars1(1202, _240084)
   Call: (274) [system] is_list(1202)
^  Redo: (273) [user] mfix_vars1(1202, _240084)
^  Unify: (273) [user] mfix_vars1(1202, _240084)
   Call: (274) [system] string(1202)
^  Redo: (273) [user] mfix_vars1(1202, _240084)
^  Unify: (273) [user] mfix_vars1(1202, _240084)
   Call: (274) [system] compound(1202)
^  Redo: (273) [user] mfix_vars1(1202, _240084)
^  Unify: (273) [user] mfix_vars1(1202, _240084)
^  Call: (274) [user] symbol(1202)
^  Unify: (274) [user] symbol(1202)
   Call: (275) [system] atom(1202)
   Fail: (275) [system] atom(1202)
^  Fail: (274) [user] symbol(1202)
^  Redo: (273) [user] mfix_vars1(1202, _240084)
   Call: (274) [system] 1202=_240084
   Exit: (274) [system] 1202=1202
^  Exit: (273) [user] mfix_vars1(1202, 1202)
   Call: (273) [apply] apply:maplist_([0], _240086, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_274410|_274412], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _274410)
^  Unify: (274) [user] mfix_vars1(0, _274410)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _274410)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_279056))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _274410)
^  Unify: (274) [user] mfix_vars1(0, _274410)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _274410)
^  Unify: (274) [user] mfix_vars1(0, _274410)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _274410)
^  Unify: (274) [user] mfix_vars1(0, _274410)
   Call: (275) [system] 0==[_288336, _288342]
^  Redo: (274) [user] mfix_vars1(0, _274410)
^  Unify: (274) [user] mfix_vars1(0, _274410)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _274410)
^  Unify: (274) [user] mfix_vars1(0, _274410)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _274410)
^  Unify: (274) [user] mfix_vars1(0, _274410)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _274410)
^  Unify: (274) [user] mfix_vars1(0, _274410)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _274410)
   Call: (275) [system] 0=_274410
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _274412, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1202, 0], [1202, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0], [";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0], [";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0])
   Call: (270) [system] compound_name_arguments(_168584, '$COMMENT', [";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT', [";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0)\=@='$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _162998)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _324584))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _324584))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _324584))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _324584))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _324584)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _324584)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _330170))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _330170))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _330170)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _330170)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _330170)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0)\=@='$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _324584)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _157386))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _157386))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _157386))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _157386))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _157386)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _157386)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _352490))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _352490))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _352490)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _352490)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _352490)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0)\=@='$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _157386)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0)))
   Call: (261) [system] '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0)\=@='$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _381268, [], _381270)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _381268, [], _381270)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _381268, [], _381270)
   Call: (258) [system] atom('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _381268, [], _381270)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _381268, [], _381270)
   Call: (258) [system] compound('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
   Exit: (258) [system] compound('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), _390584, _390586)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT', [";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0])
^  Call: (258) [user] subst_vars([";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0], _392470, [], _381270)
^  Unify: (258) [user] subst_vars([";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0], [";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0], [], [])
   Call: (259) [system] var([";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0])
^  Redo: (258) [user] subst_vars([";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0], _392470, [], _381270)
^  Unify: (258) [user] subst_vars([";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0], [_396206|_396208], [], _381270)
^  Call: (259) [user] subst_vars(";; fn test_pragma_interpreter_bare_minimal() {", _396206, [], _397146)
^  Unify: (259) [user] subst_vars(";; fn test_pragma_interpreter_bare_minimal() {", ";; fn test_pragma_interpreter_bare_minimal() {", [], [])
   Call: (260) [system] var(";; fn test_pragma_interpreter_bare_minimal() {")
^  Redo: (259) [user] subst_vars(";; fn test_pragma_interpreter_bare_minimal() {", _396206, [], _397146)
^  Unify: (259) [user] subst_vars(";; fn test_pragma_interpreter_bare_minimal() {", _396206, [], _397146)
   Call: (260) [system] atom(";; fn test_pragma_interpreter_bare_minimal() {")
^  Redo: (259) [user] subst_vars(";; fn test_pragma_interpreter_bare_minimal() {", _396206, [], _397146)
^  Unify: (259) [user] subst_vars(";; fn test_pragma_interpreter_bare_minimal() {", _396206, [], _397146)
   Call: (260) [system] compound(";; fn test_pragma_interpreter_bare_minimal() {")
^  Redo: (259) [user] subst_vars(";; fn test_pragma_interpreter_bare_minimal() {", _396206, [], _397146)
^  Unify: (259) [user] subst_vars(";; fn test_pragma_interpreter_bare_minimal() {", ";; fn test_pragma_interpreter_bare_minimal() {", [], [])
^  Exit: (259) [user] subst_vars(";; fn test_pragma_interpreter_bare_minimal() {", ";; fn test_pragma_interpreter_bare_minimal() {", [], [])
^  Call: (259) [user] subst_vars([1202, 0], _396208, [], _381270)
^  Unify: (259) [user] subst_vars([1202, 0], [1202, 0], [], [])
   Call: (260) [system] var([1202, 0])
^  Redo: (259) [user] subst_vars([1202, 0], _396208, [], _381270)
^  Unify: (259) [user] subst_vars([1202, 0], [_412078|_412080], [], _381270)
^  Call: (260) [user] subst_vars(1202, _412078, [], _413018)
^  Unify: (260) [user] subst_vars(1202, 1202, [], [])
   Call: (261) [system] var(1202)
^  Redo: (260) [user] subst_vars(1202, _412078, [], _413018)
^  Unify: (260) [user] subst_vars(1202, _412078, [], _413018)
   Call: (261) [system] atom(1202)
^  Redo: (260) [user] subst_vars(1202, _412078, [], _413018)
^  Unify: (260) [user] subst_vars(1202, _412078, [], _413018)
   Call: (261) [system] compound(1202)
^  Redo: (260) [user] subst_vars(1202, _412078, [], _413018)
^  Unify: (260) [user] subst_vars(1202, 1202, [], [])
^  Exit: (260) [user] subst_vars(1202, 1202, [], [])
^  Call: (260) [user] subst_vars([0], _412080, [], _381270)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _412080, [], _381270)
^  Unify: (260) [user] subst_vars([0], [_427950|_427952], [], _381270)
^  Call: (261) [user] subst_vars(0, _427950, [], _428890)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _427950, [], _428890)
^  Unify: (261) [user] subst_vars(0, _427950, [], _428890)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _427950, [], _428890)
^  Unify: (261) [user] subst_vars(0, _427950, [], _428890)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _427950, [], _428890)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _427952, [], _381270)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _427952, [], _381270)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1202, 0], [1202, 0], [], [])
^  Exit: (258) [user] subst_vars([";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0], [";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0], [], [])
   Call: (258) [system] compound_name_arguments(_381268, '$COMMENT', [";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT', [";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), [], [])
   Call: (257) [system] _451308=metta_file_buffer(+, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_pragma_interpreter_bare_minimal() {", 1202, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1203, 0, 43900, '$COMMENT'(";;     let program = \"", 1203, 0), '$stream_position'(43900, 1203, 0, 43900)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program = \"", 1203, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program = \"", 1203, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     let program = \"", 1203, 0), _504028))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let program = \"", 1203, 0), _504028))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     let program = \"", 1203, 0), _504028)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let program = \"", 1203, 0), _504028)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     let program = \"", 1203, 0), _504028)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     let program = \"", 1203, 0), _504028)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     let program = \"", 1203, 0), _509640))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let program = \"", 1203, 0), _509640))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     let program = \"", 1203, 0), _509640))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let program = \"", 1203, 0), _509640))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program = \"", 1203, 0), _509640)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program = \"", 1203, 0), _509640)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     let program = \"", 1203, 0), _515226))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let program = \"", 1203, 0), _515226))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     let program = \"", 1203, 0), _515226)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let program = \"", 1203, 0), _515226)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     let program = \"", 1203, 0), _515226)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program = \"", 1203, 0), _515226)
   Call: (270) [system] var('$COMMENT'(";;     let program = \"", 1203, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program = \"", 1203, 0), _515226)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program = \"", 1203, 0), '$VAR'(_522686))
   Call: (270) [system] atom('$COMMENT'(";;     let program = \"", 1203, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program = \"", 1203, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program = \"", 1203, 0), _5980)
   Call: (270) [system] '$COMMENT'(";;     let program = \"", 1203, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program = \"", 1203, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program = \"", 1203, 0), _5980)
   Call: (270) [system] '$COMMENT'(";;     let program = \"", 1203, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program = \"", 1203, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program = \"", 1203, 0), _5980)
   Call: (270) [system] '$COMMENT'(";;     let program = \"", 1203, 0)==[_14022, _14028]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program = \"", 1203, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program = \"", 1203, 0), _5980)
   Call: (270) [system] is_list('$COMMENT'(";;     let program = \"", 1203, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program = \"", 1203, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program = \"", 1203, 0), _5980)
   Call: (270) [system] string('$COMMENT'(";;     let program = \"", 1203, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let program = \"", 1203, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let program = \"", 1203, 0), _5980)
   Call: (270) [system] compound('$COMMENT'(";;     let program = \"", 1203, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     let program = \"", 1203, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     let program = \"", 1203, 0), _24224, _24226)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT', [";;     let program = \"", 1203, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     let program = \"", 1203, 0], _27966)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let program = \"", 1203, 0], _27966)
   Call: (271) [apply] apply:maplist_([";;     let program = \"", 1203, 0], _27966, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     let program = \"", 1203, 0], [_30784|_30786], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     let program = \"", _30784)
^  Unify: (272) [user] mfix_vars1(";;     let program = \"", _30784)
   Call: (273) [system] var(";;     let program = \"")
^  Redo: (272) [user] mfix_vars1(";;     let program = \"", _30784)
^  Unify: (272) [user] mfix_vars1(";;     let program = \"", '$VAR'(_35430))
   Call: (273) [system] atom(";;     let program = \"")
^  Redo: (272) [user] mfix_vars1(";;     let program = \"", _30784)
^  Unify: (272) [user] mfix_vars1(";;     let program = \"", _30784)
   Call: (273) [system] ";;     let program = \""==true
^  Redo: (272) [user] mfix_vars1(";;     let program = \"", _30784)
^  Unify: (272) [user] mfix_vars1(";;     let program = \"", _30784)
   Call: (273) [system] ";;     let program = \""==false
^  Redo: (272) [user] mfix_vars1(";;     let program = \"", _30784)
^  Unify: (272) [user] mfix_vars1(";;     let program = \"", _30784)
   Call: (273) [system] ";;     let program = \""==[_44710, _44716]
^  Redo: (272) [user] mfix_vars1(";;     let program = \"", _30784)
^  Unify: (272) [user] mfix_vars1(";;     let program = \"", _30784)
   Call: (273) [system] is_list(";;     let program = \"")
^  Redo: (272) [user] mfix_vars1(";;     let program = \"", _30784)
^  Unify: (272) [user] mfix_vars1(";;     let program = \"", _30784)
   Call: (273) [system] string(";;     let program = \"")
   Exit: (273) [system] string(";;     let program = \"")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     let program = \"", _30784)
^  Unify: (272) [user] mfix_vars1(";;     let program = \"", _30784)
   Call: (273) [system] compound(";;     let program = \"")
^  Redo: (272) [user] mfix_vars1(";;     let program = \"", _30784)
^  Unify: (272) [user] mfix_vars1(";;     let program = \"", _30784)
^  Call: (273) [user] symbol(";;     let program = \"")
^  Unify: (273) [user] symbol(";;     let program = \"")
   Call: (274) [system] atom(";;     let program = \"")
   Fail: (274) [system] atom(";;     let program = \"")
^  Fail: (273) [user] symbol(";;     let program = \"")
^  Redo: (272) [user] mfix_vars1(";;     let program = \"", _30784)
   Call: (273) [system] ";;     let program = \""=_30784
   Exit: (273) [system] ";;     let program = \""=";;     let program = \""
^  Exit: (272) [user] mfix_vars1(";;     let program = \"", ";;     let program = \"")
   Call: (272) [apply] apply:maplist_([1203, 0], _30786, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1203, 0], [_68782|_68784], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1203, _68782)
^  Unify: (273) [user] mfix_vars1(1203, _68782)
   Call: (274) [system] var(1203)
^  Redo: (273) [user] mfix_vars1(1203, _68782)
^  Unify: (273) [user] mfix_vars1(1203, '$VAR'(_73428))
   Call: (274) [system] atom(1203)
^  Redo: (273) [user] mfix_vars1(1203, _68782)
^  Unify: (273) [user] mfix_vars1(1203, _68782)
   Call: (274) [system] 1203==true
^  Redo: (273) [user] mfix_vars1(1203, _68782)
^  Unify: (273) [user] mfix_vars1(1203, _68782)
   Call: (274) [system] 1203==false
^  Redo: (273) [user] mfix_vars1(1203, _68782)
^  Unify: (273) [user] mfix_vars1(1203, _68782)
   Call: (274) [system] 1203==[_82708, _82714]
^  Redo: (273) [user] mfix_vars1(1203, _68782)
^  Unify: (273) [user] mfix_vars1(1203, _68782)
   Call: (274) [system] is_list(1203)
^  Redo: (273) [user] mfix_vars1(1203, _68782)
^  Unify: (273) [user] mfix_vars1(1203, _68782)
   Call: (274) [system] string(1203)
^  Redo: (273) [user] mfix_vars1(1203, _68782)
^  Unify: (273) [user] mfix_vars1(1203, _68782)
   Call: (274) [system] compound(1203)
^  Redo: (273) [user] mfix_vars1(1203, _68782)
^  Unify: (273) [user] mfix_vars1(1203, _68782)
^  Call: (274) [user] symbol(1203)
^  Unify: (274) [user] symbol(1203)
   Call: (275) [system] atom(1203)
   Fail: (275) [system] atom(1203)
^  Fail: (274) [user] symbol(1203)
^  Redo: (273) [user] mfix_vars1(1203, _68782)
   Call: (274) [system] 1203=_68782
   Exit: (274) [system] 1203=1203
^  Exit: (273) [user] mfix_vars1(1203, 1203)
   Call: (273) [apply] apply:maplist_([0], _68784, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_103108|_103110], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _103108)
^  Unify: (274) [user] mfix_vars1(0, _103108)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _103108)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_107754))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _103108)
^  Unify: (274) [user] mfix_vars1(0, _103108)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _103108)
^  Unify: (274) [user] mfix_vars1(0, _103108)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _103108)
^  Unify: (274) [user] mfix_vars1(0, _103108)
   Call: (275) [system] 0==[_117034, _117040]
^  Redo: (274) [user] mfix_vars1(0, _103108)
^  Unify: (274) [user] mfix_vars1(0, _103108)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _103108)
^  Unify: (274) [user] mfix_vars1(0, _103108)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _103108)
^  Unify: (274) [user] mfix_vars1(0, _103108)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _103108)
^  Unify: (274) [user] mfix_vars1(0, _103108)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _103108)
   Call: (275) [system] 0=_103108
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _103110, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1203, 0], [1203, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     let program = \"", 1203, 0], [";;     let program = \"", 1203, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let program = \"", 1203, 0], [";;     let program = \"", 1203, 0])
   Call: (270) [system] compound_name_arguments(_5980, '$COMMENT', [";;     let program = \"", 1203, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT', [";;     let program = \"", 1203, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0)))
   Call: (267) [system] '$COMMENT'(";;     let program = \"", 1203, 0)\=@='$COMMENT'(";;     let program = \"", 1203, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program = \"", 1203, 0), _5966)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     let program = \"", 1203, 0), _153282))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let program = \"", 1203, 0), _153282))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     let program = \"", 1203, 0), _153282))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let program = \"", 1203, 0), _153282))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program = \"", 1203, 0), _153282)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program = \"", 1203, 0), _153282)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     let program = \"", 1203, 0), _158868))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let program = \"", 1203, 0), _158868))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     let program = \"", 1203, 0), _158868)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let program = \"", 1203, 0), _158868)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     let program = \"", 1203, 0), _158868)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0)))
   Call: (267) [system] '$COMMENT'(";;     let program = \"", 1203, 0)\=@='$COMMENT'(";;     let program = \"", 1203, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program = \"", 1203, 0), _153282)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     let program = \"", 1203, 0), _5946))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let program = \"", 1203, 0), _5946))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     let program = \"", 1203, 0), _5946))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let program = \"", 1203, 0), _5946))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program = \"", 1203, 0), _5946)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program = \"", 1203, 0), _5946)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     let program = \"", 1203, 0), _181188))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let program = \"", 1203, 0), _181188))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     let program = \"", 1203, 0), _181188)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let program = \"", 1203, 0), _181188)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     let program = \"", 1203, 0), _181188)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0)))
   Call: (267) [system] '$COMMENT'(";;     let program = \"", 1203, 0)\=@='$COMMENT'(";;     let program = \"", 1203, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program = \"", 1203, 0), _5946)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0)))
   Call: (261) [system] '$COMMENT'(";;     let program = \"", 1203, 0)\=@='$COMMENT'(";;     let program = \"", 1203, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program = \"", 1203, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program = \"", 1203, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program = \"", 1203, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program = \"", 1203, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let program = \"", 1203, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     let program = \"", 1203, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     let program = \"", 1203, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     let program = \"", 1203, 0), _209966, [], _209968)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     let program = \"", 1203, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let program = \"", 1203, 0), _209966, [], _209968)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let program = \"", 1203, 0), _209966, [], _209968)
   Call: (258) [system] atom('$COMMENT'(";;     let program = \"", 1203, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let program = \"", 1203, 0), _209966, [], _209968)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let program = \"", 1203, 0), _209966, [], _209968)
   Call: (258) [system] compound('$COMMENT'(";;     let program = \"", 1203, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     let program = \"", 1203, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     let program = \"", 1203, 0), _219282, _219284)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT', [";;     let program = \"", 1203, 0])
^  Call: (258) [user] subst_vars([";;     let program = \"", 1203, 0], _221168, [], _209968)
^  Unify: (258) [user] subst_vars([";;     let program = \"", 1203, 0], [";;     let program = \"", 1203, 0], [], [])
   Call: (259) [system] var([";;     let program = \"", 1203, 0])
^  Redo: (258) [user] subst_vars([";;     let program = \"", 1203, 0], _221168, [], _209968)
^  Unify: (258) [user] subst_vars([";;     let program = \"", 1203, 0], [_224904|_224906], [], _209968)
^  Call: (259) [user] subst_vars(";;     let program = \"", _224904, [], _225844)
^  Unify: (259) [user] subst_vars(";;     let program = \"", ";;     let program = \"", [], [])
   Call: (260) [system] var(";;     let program = \"")
^  Redo: (259) [user] subst_vars(";;     let program = \"", _224904, [], _225844)
^  Unify: (259) [user] subst_vars(";;     let program = \"", _224904, [], _225844)
   Call: (260) [system] atom(";;     let program = \"")
^  Redo: (259) [user] subst_vars(";;     let program = \"", _224904, [], _225844)
^  Unify: (259) [user] subst_vars(";;     let program = \"", _224904, [], _225844)
   Call: (260) [system] compound(";;     let program = \"")
^  Redo: (259) [user] subst_vars(";;     let program = \"", _224904, [], _225844)
^  Unify: (259) [user] subst_vars(";;     let program = \"", ";;     let program = \"", [], [])
^  Exit: (259) [user] subst_vars(";;     let program = \"", ";;     let program = \"", [], [])
^  Call: (259) [user] subst_vars([1203, 0], _224906, [], _209968)
^  Unify: (259) [user] subst_vars([1203, 0], [1203, 0], [], [])
   Call: (260) [system] var([1203, 0])
^  Redo: (259) [user] subst_vars([1203, 0], _224906, [], _209968)
^  Unify: (259) [user] subst_vars([1203, 0], [_240776|_240778], [], _209968)
^  Call: (260) [user] subst_vars(1203, _240776, [], _241716)
^  Unify: (260) [user] subst_vars(1203, 1203, [], [])
   Call: (261) [system] var(1203)
^  Redo: (260) [user] subst_vars(1203, _240776, [], _241716)
^  Unify: (260) [user] subst_vars(1203, _240776, [], _241716)
   Call: (261) [system] atom(1203)
^  Redo: (260) [user] subst_vars(1203, _240776, [], _241716)
^  Unify: (260) [user] subst_vars(1203, _240776, [], _241716)
   Call: (261) [system] compound(1203)
^  Redo: (260) [user] subst_vars(1203, _240776, [], _241716)
^  Unify: (260) [user] subst_vars(1203, 1203, [], [])
^  Exit: (260) [user] subst_vars(1203, 1203, [], [])
^  Call: (260) [user] subst_vars([0], _240778, [], _209968)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _240778, [], _209968)
^  Unify: (260) [user] subst_vars([0], [_256648|_256650], [], _209968)
^  Call: (261) [user] subst_vars(0, _256648, [], _257588)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _256648, [], _257588)
^  Unify: (261) [user] subst_vars(0, _256648, [], _257588)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _256648, [], _257588)
^  Unify: (261) [user] subst_vars(0, _256648, [], _257588)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _256648, [], _257588)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _256650, [], _209968)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _256650, [], _209968)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1203, 0], [1203, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     let program = \"", 1203, 0], [";;     let program = \"", 1203, 0], [], [])
   Call: (258) [system] compound_name_arguments(_209966, '$COMMENT', [";;     let program = \"", 1203, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT', [";;     let program = \"", 1203, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     let program = \"", 1203, 0), '$COMMENT'(";;     let program = \"", 1203, 0), [], [])
   Call: (257) [system] _280006=metta_file_buffer(+, '$COMMENT'(";;     let program = \"", 1203, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     let program = \"", 1203, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     let program = \"", 1203, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let program = \"", 1203, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let program = \"", 1203, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program = \"", 1203, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program = \"", 1203, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program = \"", 1203, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let program = \"", 1203, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1204, 0, 43923, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$stream_position'(43923, 1204, 0, 43923)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _332728))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _332728))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _332728)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _332728)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _332728)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _332728)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _338340))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _338340))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _338340))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _338340))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _338340)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _338340)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _343926))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _343926))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _343926)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _343926)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _343926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _343926)
   Call: (270) [system] var('$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _343926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$VAR'(_351386))
   Call: (270) [system] atom('$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _343926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _343926)
   Call: (270) [system] '$COMMENT'(";;         (= (bar) baz)", 1204, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _343926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _343926)
   Call: (270) [system] '$COMMENT'(";;         (= (bar) baz)", 1204, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _343926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _343926)
   Call: (270) [system] '$COMMENT'(";;         (= (bar) baz)", 1204, 0)==[_360666, _360672]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _343926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _343926)
   Call: (270) [system] is_list('$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _343926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _343926)
   Call: (270) [system] string('$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _343926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _343926)
   Call: (270) [system] compound('$COMMENT'(";;         (= (bar) baz)", 1204, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         (= (bar) baz)", 1204, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _370868, _370870)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT', [";;         (= (bar) baz)", 1204, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         (= (bar) baz)", 1204, 0], _374610)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (= (bar) baz)", 1204, 0], _374610)
   Call: (271) [apply] apply:maplist_([";;         (= (bar) baz)", 1204, 0], _374610, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         (= (bar) baz)", 1204, 0], [_377428|_377430], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         (= (bar) baz)", _377428)
^  Unify: (272) [user] mfix_vars1(";;         (= (bar) baz)", _377428)
   Call: (273) [system] var(";;         (= (bar) baz)")
^  Redo: (272) [user] mfix_vars1(";;         (= (bar) baz)", _377428)
^  Unify: (272) [user] mfix_vars1(";;         (= (bar) baz)", '$VAR'(_382074))
   Call: (273) [system] atom(";;         (= (bar) baz)")
^  Redo: (272) [user] mfix_vars1(";;         (= (bar) baz)", _377428)
^  Unify: (272) [user] mfix_vars1(";;         (= (bar) baz)", _377428)
   Call: (273) [system] ";;         (= (bar) baz)"==true
^  Redo: (272) [user] mfix_vars1(";;         (= (bar) baz)", _377428)
^  Unify: (272) [user] mfix_vars1(";;         (= (bar) baz)", _377428)
   Call: (273) [system] ";;         (= (bar) baz)"==false
^  Redo: (272) [user] mfix_vars1(";;         (= (bar) baz)", _377428)
^  Unify: (272) [user] mfix_vars1(";;         (= (bar) baz)", _377428)
   Call: (273) [system] ";;         (= (bar) baz)"==[_391354, _391360]
^  Redo: (272) [user] mfix_vars1(";;         (= (bar) baz)", _377428)
^  Unify: (272) [user] mfix_vars1(";;         (= (bar) baz)", _377428)
   Call: (273) [system] is_list(";;         (= (bar) baz)")
^  Redo: (272) [user] mfix_vars1(";;         (= (bar) baz)", _377428)
^  Unify: (272) [user] mfix_vars1(";;         (= (bar) baz)", _377428)
   Call: (273) [system] string(";;         (= (bar) baz)")
   Exit: (273) [system] string(";;         (= (bar) baz)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         (= (bar) baz)", _377428)
^  Unify: (272) [user] mfix_vars1(";;         (= (bar) baz)", _377428)
   Call: (273) [system] compound(";;         (= (bar) baz)")
^  Redo: (272) [user] mfix_vars1(";;         (= (bar) baz)", _377428)
^  Unify: (272) [user] mfix_vars1(";;         (= (bar) baz)", _377428)
^  Call: (273) [user] symbol(";;         (= (bar) baz)")
^  Unify: (273) [user] symbol(";;         (= (bar) baz)")
   Call: (274) [system] atom(";;         (= (bar) baz)")
   Fail: (274) [system] atom(";;         (= (bar) baz)")
^  Fail: (273) [user] symbol(";;         (= (bar) baz)")
^  Redo: (272) [user] mfix_vars1(";;         (= (bar) baz)", _377428)
   Call: (273) [system] ";;         (= (bar) baz)"=_377428
   Exit: (273) [system] ";;         (= (bar) baz)"=";;         (= (bar) baz)"
^  Exit: (272) [user] mfix_vars1(";;         (= (bar) baz)", ";;         (= (bar) baz)")
   Call: (272) [apply] apply:maplist_([1204, 0], _377430, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1204, 0], [_415426|_415428], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1204, _415426)
^  Unify: (273) [user] mfix_vars1(1204, _415426)
   Call: (274) [system] var(1204)
^  Redo: (273) [user] mfix_vars1(1204, _415426)
^  Unify: (273) [user] mfix_vars1(1204, '$VAR'(_420072))
   Call: (274) [system] atom(1204)
^  Redo: (273) [user] mfix_vars1(1204, _415426)
^  Unify: (273) [user] mfix_vars1(1204, _415426)
   Call: (274) [system] 1204==true
^  Redo: (273) [user] mfix_vars1(1204, _415426)
^  Unify: (273) [user] mfix_vars1(1204, _415426)
   Call: (274) [system] 1204==false
^  Redo: (273) [user] mfix_vars1(1204, _415426)
^  Unify: (273) [user] mfix_vars1(1204, _415426)
   Call: (274) [system] 1204==[_429352, _429358]
^  Redo: (273) [user] mfix_vars1(1204, _415426)
^  Unify: (273) [user] mfix_vars1(1204, _415426)
   Call: (274) [system] is_list(1204)
^  Redo: (273) [user] mfix_vars1(1204, _415426)
^  Unify: (273) [user] mfix_vars1(1204, _415426)
   Call: (274) [system] string(1204)
^  Redo: (273) [user] mfix_vars1(1204, _415426)
^  Unify: (273) [user] mfix_vars1(1204, _415426)
   Call: (274) [system] compound(1204)
^  Redo: (273) [user] mfix_vars1(1204, _415426)
^  Unify: (273) [user] mfix_vars1(1204, _415426)
^  Call: (274) [user] symbol(1204)
^  Unify: (274) [user] symbol(1204)
   Call: (275) [system] atom(1204)
   Fail: (275) [system] atom(1204)
^  Fail: (274) [user] symbol(1204)
^  Redo: (273) [user] mfix_vars1(1204, _415426)
   Call: (274) [system] 1204=_415426
   Exit: (274) [system] 1204=1204
^  Exit: (273) [user] mfix_vars1(1204, 1204)
   Call: (273) [apply] apply:maplist_([0], _415428, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_449752|_449754], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _449752)
^  Unify: (274) [user] mfix_vars1(0, _449752)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _449752)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_454398))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _449752)
^  Unify: (274) [user] mfix_vars1(0, _449752)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _449752)
^  Unify: (274) [user] mfix_vars1(0, _449752)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _449752)
^  Unify: (274) [user] mfix_vars1(0, _449752)
   Call: (275) [system] 0==[_463678, _463684]
^  Redo: (274) [user] mfix_vars1(0, _449752)
^  Unify: (274) [user] mfix_vars1(0, _449752)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _449752)
^  Unify: (274) [user] mfix_vars1(0, _449752)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _449752)
^  Unify: (274) [user] mfix_vars1(0, _449752)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _449752)
^  Unify: (274) [user] mfix_vars1(0, _449752)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _449752)
   Call: (275) [system] 0=_449752
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _449754, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1204, 0], [1204, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         (= (bar) baz)", 1204, 0], [";;         (= (bar) baz)", 1204, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (= (bar) baz)", 1204, 0], [";;         (= (bar) baz)", 1204, 0])
   Call: (270) [system] compound_name_arguments(_343926, '$COMMENT', [";;         (= (bar) baz)", 1204, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT', [";;         (= (bar) baz)", 1204, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0)))
   Call: (267) [system] '$COMMENT'(";;         (= (bar) baz)", 1204, 0)\=@='$COMMENT'(";;         (= (bar) baz)", 1204, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _338340)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _499926))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _499926))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _499926))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _499926))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _499926)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _499926)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _505512))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _505512))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _505512)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _505512)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _505512)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0)))
   Call: (267) [system] '$COMMENT'(";;         (= (bar) baz)", 1204, 0)\=@='$COMMENT'(";;         (= (bar) baz)", 1204, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _499926)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _332728))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _332728))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _5948))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _5948))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _5948)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _9674))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _9674))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _9674)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _9674)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _9674)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0)))
   Call: (267) [system] '$COMMENT'(";;         (= (bar) baz)", 1204, 0)\=@='$COMMENT'(";;         (= (bar) baz)", 1204, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0)))
   Call: (261) [system] '$COMMENT'(";;         (= (bar) baz)", 1204, 0)\=@='$COMMENT'(";;         (= (bar) baz)", 1204, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _38452, [], _38454)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _38452, [], _38454)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _38452, [], _38454)
   Call: (258) [system] atom('$COMMENT'(";;         (= (bar) baz)", 1204, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _38452, [], _38454)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _38452, [], _38454)
   Call: (258) [system] compound('$COMMENT'(";;         (= (bar) baz)", 1204, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         (= (bar) baz)", 1204, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         (= (bar) baz)", 1204, 0), _47768, _47770)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT', [";;         (= (bar) baz)", 1204, 0])
^  Call: (258) [user] subst_vars([";;         (= (bar) baz)", 1204, 0], _49654, [], _38454)
^  Unify: (258) [user] subst_vars([";;         (= (bar) baz)", 1204, 0], [";;         (= (bar) baz)", 1204, 0], [], [])
   Call: (259) [system] var([";;         (= (bar) baz)", 1204, 0])
^  Redo: (258) [user] subst_vars([";;         (= (bar) baz)", 1204, 0], _49654, [], _38454)
^  Unify: (258) [user] subst_vars([";;         (= (bar) baz)", 1204, 0], [_53390|_53392], [], _38454)
^  Call: (259) [user] subst_vars(";;         (= (bar) baz)", _53390, [], _54330)
^  Unify: (259) [user] subst_vars(";;         (= (bar) baz)", ";;         (= (bar) baz)", [], [])
   Call: (260) [system] var(";;         (= (bar) baz)")
^  Redo: (259) [user] subst_vars(";;         (= (bar) baz)", _53390, [], _54330)
^  Unify: (259) [user] subst_vars(";;         (= (bar) baz)", _53390, [], _54330)
   Call: (260) [system] atom(";;         (= (bar) baz)")
^  Redo: (259) [user] subst_vars(";;         (= (bar) baz)", _53390, [], _54330)
^  Unify: (259) [user] subst_vars(";;         (= (bar) baz)", _53390, [], _54330)
   Call: (260) [system] compound(";;         (= (bar) baz)")
^  Redo: (259) [user] subst_vars(";;         (= (bar) baz)", _53390, [], _54330)
^  Unify: (259) [user] subst_vars(";;         (= (bar) baz)", ";;         (= (bar) baz)", [], [])
^  Exit: (259) [user] subst_vars(";;         (= (bar) baz)", ";;         (= (bar) baz)", [], [])
^  Call: (259) [user] subst_vars([1204, 0], _53392, [], _38454)
^  Unify: (259) [user] subst_vars([1204, 0], [1204, 0], [], [])
   Call: (260) [system] var([1204, 0])
^  Redo: (259) [user] subst_vars([1204, 0], _53392, [], _38454)
^  Unify: (259) [user] subst_vars([1204, 0], [_69262|_69264], [], _38454)
^  Call: (260) [user] subst_vars(1204, _69262, [], _70202)
^  Unify: (260) [user] subst_vars(1204, 1204, [], [])
   Call: (261) [system] var(1204)
^  Redo: (260) [user] subst_vars(1204, _69262, [], _70202)
^  Unify: (260) [user] subst_vars(1204, _69262, [], _70202)
   Call: (261) [system] atom(1204)
^  Redo: (260) [user] subst_vars(1204, _69262, [], _70202)
^  Unify: (260) [user] subst_vars(1204, _69262, [], _70202)
   Call: (261) [system] compound(1204)
^  Redo: (260) [user] subst_vars(1204, _69262, [], _70202)
^  Unify: (260) [user] subst_vars(1204, 1204, [], [])
^  Exit: (260) [user] subst_vars(1204, 1204, [], [])
^  Call: (260) [user] subst_vars([0], _69264, [], _38454)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _69264, [], _38454)
^  Unify: (260) [user] subst_vars([0], [_85134|_85136], [], _38454)
^  Call: (261) [user] subst_vars(0, _85134, [], _86074)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _85134, [], _86074)
^  Unify: (261) [user] subst_vars(0, _85134, [], _86074)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _85134, [], _86074)
^  Unify: (261) [user] subst_vars(0, _85134, [], _86074)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _85134, [], _86074)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _85136, [], _38454)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _85136, [], _38454)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1204, 0], [1204, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         (= (bar) baz)", 1204, 0], [";;         (= (bar) baz)", 1204, 0], [], [])
   Call: (258) [system] compound_name_arguments(_38452, '$COMMENT', [";;         (= (bar) baz)", 1204, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT', [";;         (= (bar) baz)", 1204, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         (= (bar) baz)", 1204, 0), '$COMMENT'(";;         (= (bar) baz)", 1204, 0), [], [])
   Call: (257) [system] _108492=metta_file_buffer(+, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (= (bar) baz)", 1204, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1205, 0, 43948, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$stream_position'(43948, 1205, 0, 43948)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _161214))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _161214))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _161214)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _161214)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _161214)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _161214)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _166826))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _166826))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _166826))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _166826))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _166826)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _166826)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _172412))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _172412))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _172412)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _172412)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _172412)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _172412)
   Call: (270) [system] var('$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _172412)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$VAR'(_179872))
   Call: (270) [system] atom('$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _172412)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _172412)
   Call: (270) [system] '$COMMENT'(";;         (= (foo) (bar))", 1205, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _172412)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _172412)
   Call: (270) [system] '$COMMENT'(";;         (= (foo) (bar))", 1205, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _172412)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _172412)
   Call: (270) [system] '$COMMENT'(";;         (= (foo) (bar))", 1205, 0)==[_189152, _189158]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _172412)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _172412)
   Call: (270) [system] is_list('$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _172412)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _172412)
   Call: (270) [system] string('$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _172412)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _172412)
   Call: (270) [system] compound('$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _199354, _199356)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT', [";;         (= (foo) (bar))", 1205, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         (= (foo) (bar))", 1205, 0], _203096)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (= (foo) (bar))", 1205, 0], _203096)
   Call: (271) [apply] apply:maplist_([";;         (= (foo) (bar))", 1205, 0], _203096, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         (= (foo) (bar))", 1205, 0], [_205914|_205916], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         (= (foo) (bar))", _205914)
^  Unify: (272) [user] mfix_vars1(";;         (= (foo) (bar))", _205914)
   Call: (273) [system] var(";;         (= (foo) (bar))")
^  Redo: (272) [user] mfix_vars1(";;         (= (foo) (bar))", _205914)
^  Unify: (272) [user] mfix_vars1(";;         (= (foo) (bar))", '$VAR'(_210560))
   Call: (273) [system] atom(";;         (= (foo) (bar))")
^  Redo: (272) [user] mfix_vars1(";;         (= (foo) (bar))", _205914)
^  Unify: (272) [user] mfix_vars1(";;         (= (foo) (bar))", _205914)
   Call: (273) [system] ";;         (= (foo) (bar))"==true
^  Redo: (272) [user] mfix_vars1(";;         (= (foo) (bar))", _205914)
^  Unify: (272) [user] mfix_vars1(";;         (= (foo) (bar))", _205914)
   Call: (273) [system] ";;         (= (foo) (bar))"==false
^  Redo: (272) [user] mfix_vars1(";;         (= (foo) (bar))", _205914)
^  Unify: (272) [user] mfix_vars1(";;         (= (foo) (bar))", _205914)
   Call: (273) [system] ";;         (= (foo) (bar))"==[_219840, _219846]
^  Redo: (272) [user] mfix_vars1(";;         (= (foo) (bar))", _205914)
^  Unify: (272) [user] mfix_vars1(";;         (= (foo) (bar))", _205914)
   Call: (273) [system] is_list(";;         (= (foo) (bar))")
^  Redo: (272) [user] mfix_vars1(";;         (= (foo) (bar))", _205914)
^  Unify: (272) [user] mfix_vars1(";;         (= (foo) (bar))", _205914)
   Call: (273) [system] string(";;         (= (foo) (bar))")
   Exit: (273) [system] string(";;         (= (foo) (bar))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         (= (foo) (bar))", _205914)
^  Unify: (272) [user] mfix_vars1(";;         (= (foo) (bar))", _205914)
   Call: (273) [system] compound(";;         (= (foo) (bar))")
^  Redo: (272) [user] mfix_vars1(";;         (= (foo) (bar))", _205914)
^  Unify: (272) [user] mfix_vars1(";;         (= (foo) (bar))", _205914)
^  Call: (273) [user] symbol(";;         (= (foo) (bar))")
^  Unify: (273) [user] symbol(";;         (= (foo) (bar))")
   Call: (274) [system] atom(";;         (= (foo) (bar))")
   Fail: (274) [system] atom(";;         (= (foo) (bar))")
^  Fail: (273) [user] symbol(";;         (= (foo) (bar))")
^  Redo: (272) [user] mfix_vars1(";;         (= (foo) (bar))", _205914)
   Call: (273) [system] ";;         (= (foo) (bar))"=_205914
   Exit: (273) [system] ";;         (= (foo) (bar))"=";;         (= (foo) (bar))"
^  Exit: (272) [user] mfix_vars1(";;         (= (foo) (bar))", ";;         (= (foo) (bar))")
   Call: (272) [apply] apply:maplist_([1205, 0], _205916, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1205, 0], [_243912|_243914], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1205, _243912)
^  Unify: (273) [user] mfix_vars1(1205, _243912)
   Call: (274) [system] var(1205)
^  Redo: (273) [user] mfix_vars1(1205, _243912)
^  Unify: (273) [user] mfix_vars1(1205, '$VAR'(_248558))
   Call: (274) [system] atom(1205)
^  Redo: (273) [user] mfix_vars1(1205, _243912)
^  Unify: (273) [user] mfix_vars1(1205, _243912)
   Call: (274) [system] 1205==true
^  Redo: (273) [user] mfix_vars1(1205, _243912)
^  Unify: (273) [user] mfix_vars1(1205, _243912)
   Call: (274) [system] 1205==false
^  Redo: (273) [user] mfix_vars1(1205, _243912)
^  Unify: (273) [user] mfix_vars1(1205, _243912)
   Call: (274) [system] 1205==[_257838, _257844]
^  Redo: (273) [user] mfix_vars1(1205, _243912)
^  Unify: (273) [user] mfix_vars1(1205, _243912)
   Call: (274) [system] is_list(1205)
^  Redo: (273) [user] mfix_vars1(1205, _243912)
^  Unify: (273) [user] mfix_vars1(1205, _243912)
   Call: (274) [system] string(1205)
^  Redo: (273) [user] mfix_vars1(1205, _243912)
^  Unify: (273) [user] mfix_vars1(1205, _243912)
   Call: (274) [system] compound(1205)
^  Redo: (273) [user] mfix_vars1(1205, _243912)
^  Unify: (273) [user] mfix_vars1(1205, _243912)
^  Call: (274) [user] symbol(1205)
^  Unify: (274) [user] symbol(1205)
   Call: (275) [system] atom(1205)
   Fail: (275) [system] atom(1205)
^  Fail: (274) [user] symbol(1205)
^  Redo: (273) [user] mfix_vars1(1205, _243912)
   Call: (274) [system] 1205=_243912
   Exit: (274) [system] 1205=1205
^  Exit: (273) [user] mfix_vars1(1205, 1205)
   Call: (273) [apply] apply:maplist_([0], _243914, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_278238|_278240], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _278238)
^  Unify: (274) [user] mfix_vars1(0, _278238)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _278238)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_282884))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _278238)
^  Unify: (274) [user] mfix_vars1(0, _278238)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _278238)
^  Unify: (274) [user] mfix_vars1(0, _278238)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _278238)
^  Unify: (274) [user] mfix_vars1(0, _278238)
   Call: (275) [system] 0==[_292164, _292170]
^  Redo: (274) [user] mfix_vars1(0, _278238)
^  Unify: (274) [user] mfix_vars1(0, _278238)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _278238)
^  Unify: (274) [user] mfix_vars1(0, _278238)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _278238)
^  Unify: (274) [user] mfix_vars1(0, _278238)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _278238)
^  Unify: (274) [user] mfix_vars1(0, _278238)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _278238)
   Call: (275) [system] 0=_278238
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _278240, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1205, 0], [1205, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         (= (foo) (bar))", 1205, 0], [";;         (= (foo) (bar))", 1205, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (= (foo) (bar))", 1205, 0], [";;         (= (foo) (bar))", 1205, 0])
   Call: (270) [system] compound_name_arguments(_172412, '$COMMENT', [";;         (= (foo) (bar))", 1205, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT', [";;         (= (foo) (bar))", 1205, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0)))
   Call: (267) [system] '$COMMENT'(";;         (= (foo) (bar))", 1205, 0)\=@='$COMMENT'(";;         (= (foo) (bar))", 1205, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _166826)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _328412))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _328412))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _328412))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _328412))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _328412)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _328412)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _333998))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _333998))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _333998)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _333998)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _333998)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0)))
   Call: (267) [system] '$COMMENT'(";;         (= (foo) (bar))", 1205, 0)\=@='$COMMENT'(";;         (= (foo) (bar))", 1205, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _328412)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _161214))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _161214))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _161214))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _161214))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _161214)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _161214)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _356318))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _356318))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _356318)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _356318)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _356318)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0)))
   Call: (267) [system] '$COMMENT'(";;         (= (foo) (bar))", 1205, 0)\=@='$COMMENT'(";;         (= (foo) (bar))", 1205, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _161214)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0)))
   Call: (261) [system] '$COMMENT'(";;         (= (foo) (bar))", 1205, 0)\=@='$COMMENT'(";;         (= (foo) (bar))", 1205, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _385096, [], _385098)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _385096, [], _385098)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _385096, [], _385098)
   Call: (258) [system] atom('$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _385096, [], _385098)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _385096, [], _385098)
   Call: (258) [system] compound('$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         (= (foo) (bar))", 1205, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), _394412, _394414)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT', [";;         (= (foo) (bar))", 1205, 0])
^  Call: (258) [user] subst_vars([";;         (= (foo) (bar))", 1205, 0], _396298, [], _385098)
^  Unify: (258) [user] subst_vars([";;         (= (foo) (bar))", 1205, 0], [";;         (= (foo) (bar))", 1205, 0], [], [])
   Call: (259) [system] var([";;         (= (foo) (bar))", 1205, 0])
^  Redo: (258) [user] subst_vars([";;         (= (foo) (bar))", 1205, 0], _396298, [], _385098)
^  Unify: (258) [user] subst_vars([";;         (= (foo) (bar))", 1205, 0], [_400034|_400036], [], _385098)
^  Call: (259) [user] subst_vars(";;         (= (foo) (bar))", _400034, [], _400974)
^  Unify: (259) [user] subst_vars(";;         (= (foo) (bar))", ";;         (= (foo) (bar))", [], [])
   Call: (260) [system] var(";;         (= (foo) (bar))")
^  Redo: (259) [user] subst_vars(";;         (= (foo) (bar))", _400034, [], _400974)
^  Unify: (259) [user] subst_vars(";;         (= (foo) (bar))", _400034, [], _400974)
   Call: (260) [system] atom(";;         (= (foo) (bar))")
^  Redo: (259) [user] subst_vars(";;         (= (foo) (bar))", _400034, [], _400974)
^  Unify: (259) [user] subst_vars(";;         (= (foo) (bar))", _400034, [], _400974)
   Call: (260) [system] compound(";;         (= (foo) (bar))")
^  Redo: (259) [user] subst_vars(";;         (= (foo) (bar))", _400034, [], _400974)
^  Unify: (259) [user] subst_vars(";;         (= (foo) (bar))", ";;         (= (foo) (bar))", [], [])
^  Exit: (259) [user] subst_vars(";;         (= (foo) (bar))", ";;         (= (foo) (bar))", [], [])
^  Call: (259) [user] subst_vars([1205, 0], _400036, [], _385098)
^  Unify: (259) [user] subst_vars([1205, 0], [1205, 0], [], [])
   Call: (260) [system] var([1205, 0])
^  Redo: (259) [user] subst_vars([1205, 0], _400036, [], _385098)
^  Unify: (259) [user] subst_vars([1205, 0], [_415906|_415908], [], _385098)
^  Call: (260) [user] subst_vars(1205, _415906, [], _416846)
^  Unify: (260) [user] subst_vars(1205, 1205, [], [])
   Call: (261) [system] var(1205)
^  Redo: (260) [user] subst_vars(1205, _415906, [], _416846)
^  Unify: (260) [user] subst_vars(1205, _415906, [], _416846)
   Call: (261) [system] atom(1205)
^  Redo: (260) [user] subst_vars(1205, _415906, [], _416846)
^  Unify: (260) [user] subst_vars(1205, _415906, [], _416846)
   Call: (261) [system] compound(1205)
^  Redo: (260) [user] subst_vars(1205, _415906, [], _416846)
^  Unify: (260) [user] subst_vars(1205, 1205, [], [])
^  Exit: (260) [user] subst_vars(1205, 1205, [], [])
^  Call: (260) [user] subst_vars([0], _415908, [], _385098)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _415908, [], _385098)
^  Unify: (260) [user] subst_vars([0], [_431778|_431780], [], _385098)
^  Call: (261) [user] subst_vars(0, _431778, [], _432718)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _431778, [], _432718)
^  Unify: (261) [user] subst_vars(0, _431778, [], _432718)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _431778, [], _432718)
^  Unify: (261) [user] subst_vars(0, _431778, [], _432718)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _431778, [], _432718)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _431780, [], _385098)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _431780, [], _385098)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1205, 0], [1205, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         (= (foo) (bar))", 1205, 0], [";;         (= (foo) (bar))", 1205, 0], [], [])
   Call: (258) [system] compound_name_arguments(_385096, '$COMMENT', [";;         (= (foo) (bar))", 1205, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT', [";;         (= (foo) (bar))", 1205, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         (= (foo) (bar))", 1205, 0), '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), [], [])
   Call: (257) [system] _455136=metta_file_buffer(+, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (= (foo) (bar))", 1205, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1206, 0, 43975, '$COMMENT'(";;         !(foo)", 1206, 0), '$stream_position'(43975, 1206, 0, 43975)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(foo)", 1206, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(foo)", 1206, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         !(foo)", 1206, 0), _507856))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(foo)", 1206, 0), _507856))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         !(foo)", 1206, 0), _507856)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(foo)", 1206, 0), _507856)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         !(foo)", 1206, 0), _507856)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         !(foo)", 1206, 0), _507856)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         !(foo)", 1206, 0), _513468))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(foo)", 1206, 0), _513468))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(foo)", 1206, 0), _513468))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(foo)", 1206, 0), _513468))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(foo)", 1206, 0), _513468)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(foo)", 1206, 0), _513468)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         !(foo)", 1206, 0), _519054))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(foo)", 1206, 0), _519054))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         !(foo)", 1206, 0), _519054)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(foo)", 1206, 0), _519054)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1206, 0), _519054)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1206, 0), _5980)
   Call: (270) [system] var('$COMMENT'(";;         !(foo)", 1206, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1206, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1206, 0), '$VAR'(_8558))
   Call: (270) [system] atom('$COMMENT'(";;         !(foo)", 1206, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1206, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1206, 0), _5980)
   Call: (270) [system] '$COMMENT'(";;         !(foo)", 1206, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1206, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1206, 0), _5980)
   Call: (270) [system] '$COMMENT'(";;         !(foo)", 1206, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1206, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1206, 0), _5980)
   Call: (270) [system] '$COMMENT'(";;         !(foo)", 1206, 0)==[_17838, _17844]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1206, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1206, 0), _5980)
   Call: (270) [system] is_list('$COMMENT'(";;         !(foo)", 1206, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1206, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1206, 0), _5980)
   Call: (270) [system] string('$COMMENT'(";;         !(foo)", 1206, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1206, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1206, 0), _5980)
   Call: (270) [system] compound('$COMMENT'(";;         !(foo)", 1206, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         !(foo)", 1206, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         !(foo)", 1206, 0), _28040, _28042)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT', [";;         !(foo)", 1206, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         !(foo)", 1206, 0], _31782)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(foo)", 1206, 0], _31782)
   Call: (271) [apply] apply:maplist_([";;         !(foo)", 1206, 0], _31782, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         !(foo)", 1206, 0], [_34600|_34602], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         !(foo)", _34600)
^  Unify: (272) [user] mfix_vars1(";;         !(foo)", _34600)
   Call: (273) [system] var(";;         !(foo)")
^  Redo: (272) [user] mfix_vars1(";;         !(foo)", _34600)
^  Unify: (272) [user] mfix_vars1(";;         !(foo)", '$VAR'(_39246))
   Call: (273) [system] atom(";;         !(foo)")
^  Redo: (272) [user] mfix_vars1(";;         !(foo)", _34600)
^  Unify: (272) [user] mfix_vars1(";;         !(foo)", _34600)
   Call: (273) [system] ";;         !(foo)"==true
^  Redo: (272) [user] mfix_vars1(";;         !(foo)", _34600)
^  Unify: (272) [user] mfix_vars1(";;         !(foo)", _34600)
   Call: (273) [system] ";;         !(foo)"==false
^  Redo: (272) [user] mfix_vars1(";;         !(foo)", _34600)
^  Unify: (272) [user] mfix_vars1(";;         !(foo)", _34600)
   Call: (273) [system] ";;         !(foo)"==[_48526, _48532]
^  Redo: (272) [user] mfix_vars1(";;         !(foo)", _34600)
^  Unify: (272) [user] mfix_vars1(";;         !(foo)", _34600)
   Call: (273) [system] is_list(";;         !(foo)")
^  Redo: (272) [user] mfix_vars1(";;         !(foo)", _34600)
^  Unify: (272) [user] mfix_vars1(";;         !(foo)", _34600)
   Call: (273) [system] string(";;         !(foo)")
   Exit: (273) [system] string(";;         !(foo)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         !(foo)", _34600)
^  Unify: (272) [user] mfix_vars1(";;         !(foo)", _34600)
   Call: (273) [system] compound(";;         !(foo)")
^  Redo: (272) [user] mfix_vars1(";;         !(foo)", _34600)
^  Unify: (272) [user] mfix_vars1(";;         !(foo)", _34600)
^  Call: (273) [user] symbol(";;         !(foo)")
^  Unify: (273) [user] symbol(";;         !(foo)")
   Call: (274) [system] atom(";;         !(foo)")
   Fail: (274) [system] atom(";;         !(foo)")
^  Fail: (273) [user] symbol(";;         !(foo)")
^  Redo: (272) [user] mfix_vars1(";;         !(foo)", _34600)
   Call: (273) [system] ";;         !(foo)"=_34600
   Exit: (273) [system] ";;         !(foo)"=";;         !(foo)"
^  Exit: (272) [user] mfix_vars1(";;         !(foo)", ";;         !(foo)")
   Call: (272) [apply] apply:maplist_([1206, 0], _34602, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1206, 0], [_72598|_72600], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1206, _72598)
^  Unify: (273) [user] mfix_vars1(1206, _72598)
   Call: (274) [system] var(1206)
^  Redo: (273) [user] mfix_vars1(1206, _72598)
^  Unify: (273) [user] mfix_vars1(1206, '$VAR'(_77244))
   Call: (274) [system] atom(1206)
^  Redo: (273) [user] mfix_vars1(1206, _72598)
^  Unify: (273) [user] mfix_vars1(1206, _72598)
   Call: (274) [system] 1206==true
^  Redo: (273) [user] mfix_vars1(1206, _72598)
^  Unify: (273) [user] mfix_vars1(1206, _72598)
   Call: (274) [system] 1206==false
^  Redo: (273) [user] mfix_vars1(1206, _72598)
^  Unify: (273) [user] mfix_vars1(1206, _72598)
   Call: (274) [system] 1206==[_86524, _86530]
^  Redo: (273) [user] mfix_vars1(1206, _72598)
^  Unify: (273) [user] mfix_vars1(1206, _72598)
   Call: (274) [system] is_list(1206)
^  Redo: (273) [user] mfix_vars1(1206, _72598)
^  Unify: (273) [user] mfix_vars1(1206, _72598)
   Call: (274) [system] string(1206)
^  Redo: (273) [user] mfix_vars1(1206, _72598)
^  Unify: (273) [user] mfix_vars1(1206, _72598)
   Call: (274) [system] compound(1206)
^  Redo: (273) [user] mfix_vars1(1206, _72598)
^  Unify: (273) [user] mfix_vars1(1206, _72598)
^  Call: (274) [user] symbol(1206)
^  Unify: (274) [user] symbol(1206)
   Call: (275) [system] atom(1206)
   Fail: (275) [system] atom(1206)
^  Fail: (274) [user] symbol(1206)
^  Redo: (273) [user] mfix_vars1(1206, _72598)
   Call: (274) [system] 1206=_72598
   Exit: (274) [system] 1206=1206
^  Exit: (273) [user] mfix_vars1(1206, 1206)
   Call: (273) [apply] apply:maplist_([0], _72600, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_106924|_106926], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _106924)
^  Unify: (274) [user] mfix_vars1(0, _106924)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _106924)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_111570))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _106924)
^  Unify: (274) [user] mfix_vars1(0, _106924)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _106924)
^  Unify: (274) [user] mfix_vars1(0, _106924)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _106924)
^  Unify: (274) [user] mfix_vars1(0, _106924)
   Call: (275) [system] 0==[_120850, _120856]
^  Redo: (274) [user] mfix_vars1(0, _106924)
^  Unify: (274) [user] mfix_vars1(0, _106924)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _106924)
^  Unify: (274) [user] mfix_vars1(0, _106924)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _106924)
^  Unify: (274) [user] mfix_vars1(0, _106924)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _106924)
^  Unify: (274) [user] mfix_vars1(0, _106924)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _106924)
   Call: (275) [system] 0=_106924
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _106926, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1206, 0], [1206, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         !(foo)", 1206, 0], [";;         !(foo)", 1206, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(foo)", 1206, 0], [";;         !(foo)", 1206, 0])
   Call: (270) [system] compound_name_arguments(_5980, '$COMMENT', [";;         !(foo)", 1206, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT', [";;         !(foo)", 1206, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(foo)", 1206, 0)\=@='$COMMENT'(";;         !(foo)", 1206, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(foo)", 1206, 0), _5966)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         !(foo)", 1206, 0), _157098))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(foo)", 1206, 0), _157098))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         !(foo)", 1206, 0), _157098))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(foo)", 1206, 0), _157098))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(foo)", 1206, 0), _157098)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(foo)", 1206, 0), _157098)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         !(foo)", 1206, 0), _162684))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(foo)", 1206, 0), _162684))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         !(foo)", 1206, 0), _162684)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(foo)", 1206, 0), _162684)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         !(foo)", 1206, 0), _162684)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(foo)", 1206, 0)\=@='$COMMENT'(";;         !(foo)", 1206, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(foo)", 1206, 0), _157098)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         !(foo)", 1206, 0), _5946))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(foo)", 1206, 0), _5946))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         !(foo)", 1206, 0), _5946))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(foo)", 1206, 0), _5946))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(foo)", 1206, 0), _5946)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(foo)", 1206, 0), _5946)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         !(foo)", 1206, 0), _185004))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(foo)", 1206, 0), _185004))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         !(foo)", 1206, 0), _185004)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(foo)", 1206, 0), _185004)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         !(foo)", 1206, 0), _185004)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(foo)", 1206, 0)\=@='$COMMENT'(";;         !(foo)", 1206, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(foo)", 1206, 0), _5946)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0)))
   Call: (261) [system] '$COMMENT'(";;         !(foo)", 1206, 0)\=@='$COMMENT'(";;         !(foo)", 1206, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(foo)", 1206, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(foo)", 1206, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(foo)", 1206, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(foo)", 1206, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(foo)", 1206, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         !(foo)", 1206, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         !(foo)", 1206, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         !(foo)", 1206, 0), _213782, [], _213784)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         !(foo)", 1206, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(foo)", 1206, 0), _213782, [], _213784)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(foo)", 1206, 0), _213782, [], _213784)
   Call: (258) [system] atom('$COMMENT'(";;         !(foo)", 1206, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(foo)", 1206, 0), _213782, [], _213784)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(foo)", 1206, 0), _213782, [], _213784)
   Call: (258) [system] compound('$COMMENT'(";;         !(foo)", 1206, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         !(foo)", 1206, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         !(foo)", 1206, 0), _223098, _223100)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT', [";;         !(foo)", 1206, 0])
^  Call: (258) [user] subst_vars([";;         !(foo)", 1206, 0], _224984, [], _213784)
^  Unify: (258) [user] subst_vars([";;         !(foo)", 1206, 0], [";;         !(foo)", 1206, 0], [], [])
   Call: (259) [system] var([";;         !(foo)", 1206, 0])
^  Redo: (258) [user] subst_vars([";;         !(foo)", 1206, 0], _224984, [], _213784)
^  Unify: (258) [user] subst_vars([";;         !(foo)", 1206, 0], [_228720|_228722], [], _213784)
^  Call: (259) [user] subst_vars(";;         !(foo)", _228720, [], _229660)
^  Unify: (259) [user] subst_vars(";;         !(foo)", ";;         !(foo)", [], [])
   Call: (260) [system] var(";;         !(foo)")
^  Redo: (259) [user] subst_vars(";;         !(foo)", _228720, [], _229660)
^  Unify: (259) [user] subst_vars(";;         !(foo)", _228720, [], _229660)
   Call: (260) [system] atom(";;         !(foo)")
^  Redo: (259) [user] subst_vars(";;         !(foo)", _228720, [], _229660)
^  Unify: (259) [user] subst_vars(";;         !(foo)", _228720, [], _229660)
   Call: (260) [system] compound(";;         !(foo)")
^  Redo: (259) [user] subst_vars(";;         !(foo)", _228720, [], _229660)
^  Unify: (259) [user] subst_vars(";;         !(foo)", ";;         !(foo)", [], [])
^  Exit: (259) [user] subst_vars(";;         !(foo)", ";;         !(foo)", [], [])
^  Call: (259) [user] subst_vars([1206, 0], _228722, [], _213784)
^  Unify: (259) [user] subst_vars([1206, 0], [1206, 0], [], [])
   Call: (260) [system] var([1206, 0])
^  Redo: (259) [user] subst_vars([1206, 0], _228722, [], _213784)
^  Unify: (259) [user] subst_vars([1206, 0], [_244592|_244594], [], _213784)
^  Call: (260) [user] subst_vars(1206, _244592, [], _245532)
^  Unify: (260) [user] subst_vars(1206, 1206, [], [])
   Call: (261) [system] var(1206)
^  Redo: (260) [user] subst_vars(1206, _244592, [], _245532)
^  Unify: (260) [user] subst_vars(1206, _244592, [], _245532)
   Call: (261) [system] atom(1206)
^  Redo: (260) [user] subst_vars(1206, _244592, [], _245532)
^  Unify: (260) [user] subst_vars(1206, _244592, [], _245532)
   Call: (261) [system] compound(1206)
^  Redo: (260) [user] subst_vars(1206, _244592, [], _245532)
^  Unify: (260) [user] subst_vars(1206, 1206, [], [])
^  Exit: (260) [user] subst_vars(1206, 1206, [], [])
^  Call: (260) [user] subst_vars([0], _244594, [], _213784)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _244594, [], _213784)
^  Unify: (260) [user] subst_vars([0], [_260464|_260466], [], _213784)
^  Call: (261) [user] subst_vars(0, _260464, [], _261404)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _260464, [], _261404)
^  Unify: (261) [user] subst_vars(0, _260464, [], _261404)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _260464, [], _261404)
^  Unify: (261) [user] subst_vars(0, _260464, [], _261404)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _260464, [], _261404)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _260466, [], _213784)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _260466, [], _213784)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1206, 0], [1206, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         !(foo)", 1206, 0], [";;         !(foo)", 1206, 0], [], [])
   Call: (258) [system] compound_name_arguments(_213782, '$COMMENT', [";;         !(foo)", 1206, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT', [";;         !(foo)", 1206, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         !(foo)", 1206, 0), '$COMMENT'(";;         !(foo)", 1206, 0), [], [])
   Call: (257) [system] _283822=metta_file_buffer(+, '$COMMENT'(";;         !(foo)", 1206, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         !(foo)", 1206, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         !(foo)", 1206, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(foo)", 1206, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(foo)", 1206, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(foo)", 1206, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(foo)", 1206, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(foo)", 1206, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(foo)", 1206, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1207, 0, 43993, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$stream_position'(43993, 1207, 0, 43993)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _336548))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _336548))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _336548)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _336548)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _336548)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _336548)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _342160))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _342160))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _342160))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _342160))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _342160)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _342160)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _347746))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _347746))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _347746)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _347746)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _347746)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _347746)
   Call: (270) [system] var('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _347746)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$VAR'(_355206))
   Call: (270) [system] atom('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _347746)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _347746)
   Call: (270) [system] '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _347746)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _347746)
   Call: (270) [system] '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _347746)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _347746)
   Call: (270) [system] '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0)==[_364486, _364492]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _347746)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _347746)
   Call: (270) [system] is_list('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _347746)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _347746)
   Call: (270) [system] string('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _347746)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _347746)
   Call: (270) [system] compound('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _374688, _374690)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT', [";;         !(pragma! interpreter bare-minimal)", 1207, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         !(pragma! interpreter bare-minimal)", 1207, 0], _378430)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(pragma! interpreter bare-minimal)", 1207, 0], _378430)
   Call: (271) [apply] apply:maplist_([";;         !(pragma! interpreter bare-minimal)", 1207, 0], _378430, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         !(pragma! interpreter bare-minimal)", 1207, 0], [_381248|_381250], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         !(pragma! interpreter bare-minimal)", _381248)
^  Unify: (272) [user] mfix_vars1(";;         !(pragma! interpreter bare-minimal)", _381248)
   Call: (273) [system] var(";;         !(pragma! interpreter bare-minimal)")
^  Redo: (272) [user] mfix_vars1(";;         !(pragma! interpreter bare-minimal)", _381248)
^  Unify: (272) [user] mfix_vars1(";;         !(pragma! interpreter bare-minimal)", '$VAR'(_385894))
   Call: (273) [system] atom(";;         !(pragma! interpreter bare-minimal)")
^  Redo: (272) [user] mfix_vars1(";;         !(pragma! interpreter bare-minimal)", _381248)
^  Unify: (272) [user] mfix_vars1(";;         !(pragma! interpreter bare-minimal)", _381248)
   Call: (273) [system] ";;         !(pragma! interpreter bare-minimal)"==true
^  Redo: (272) [user] mfix_vars1(";;         !(pragma! interpreter bare-minimal)", _381248)
^  Unify: (272) [user] mfix_vars1(";;         !(pragma! interpreter bare-minimal)", _381248)
   Call: (273) [system] ";;         !(pragma! interpreter bare-minimal)"==false
^  Redo: (272) [user] mfix_vars1(";;         !(pragma! interpreter bare-minimal)", _381248)
^  Unify: (272) [user] mfix_vars1(";;         !(pragma! interpreter bare-minimal)", _381248)
   Call: (273) [system] ";;         !(pragma! interpreter bare-minimal)"==[_395174, _395180]
^  Redo: (272) [user] mfix_vars1(";;         !(pragma! interpreter bare-minimal)", _381248)
^  Unify: (272) [user] mfix_vars1(";;         !(pragma! interpreter bare-minimal)", _381248)
   Call: (273) [system] is_list(";;         !(pragma! interpreter bare-minimal)")
^  Redo: (272) [user] mfix_vars1(";;         !(pragma! interpreter bare-minimal)", _381248)
^  Unify: (272) [user] mfix_vars1(";;         !(pragma! interpreter bare-minimal)", _381248)
   Call: (273) [system] string(";;         !(pragma! interpreter bare-minimal)")
   Exit: (273) [system] string(";;         !(pragma! interpreter bare-minimal)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         !(pragma! interpreter bare-minimal)", _381248)
^  Unify: (272) [user] mfix_vars1(";;         !(pragma! interpreter bare-minimal)", _381248)
   Call: (273) [system] compound(";;         !(pragma! interpreter bare-minimal)")
^  Redo: (272) [user] mfix_vars1(";;         !(pragma! interpreter bare-minimal)", _381248)
^  Unify: (272) [user] mfix_vars1(";;         !(pragma! interpreter bare-minimal)", _381248)
^  Call: (273) [user] symbol(";;         !(pragma! interpreter bare-minimal)")
^  Unify: (273) [user] symbol(";;         !(pragma! interpreter bare-minimal)")
   Call: (274) [system] atom(";;         !(pragma! interpreter bare-minimal)")
   Fail: (274) [system] atom(";;         !(pragma! interpreter bare-minimal)")
^  Fail: (273) [user] symbol(";;         !(pragma! interpreter bare-minimal)")
^  Redo: (272) [user] mfix_vars1(";;         !(pragma! interpreter bare-minimal)", _381248)
   Call: (273) [system] ";;         !(pragma! interpreter bare-minimal)"=_381248
   Exit: (273) [system] ";;         !(pragma! interpreter bare-minimal)"=";;         !(pragma! interpreter bare-minimal)"
^  Exit: (272) [user] mfix_vars1(";;         !(pragma! interpreter bare-minimal)", ";;         !(pragma! interpreter bare-minimal)")
   Call: (272) [apply] apply:maplist_([1207, 0], _381250, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1207, 0], [_419246|_419248], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1207, _419246)
^  Unify: (273) [user] mfix_vars1(1207, _419246)
   Call: (274) [system] var(1207)
^  Redo: (273) [user] mfix_vars1(1207, _419246)
^  Unify: (273) [user] mfix_vars1(1207, '$VAR'(_423892))
   Call: (274) [system] atom(1207)
^  Redo: (273) [user] mfix_vars1(1207, _419246)
^  Unify: (273) [user] mfix_vars1(1207, _419246)
   Call: (274) [system] 1207==true
^  Redo: (273) [user] mfix_vars1(1207, _419246)
^  Unify: (273) [user] mfix_vars1(1207, _419246)
   Call: (274) [system] 1207==false
^  Redo: (273) [user] mfix_vars1(1207, _419246)
^  Unify: (273) [user] mfix_vars1(1207, _419246)
   Call: (274) [system] 1207==[_433172, _433178]
^  Redo: (273) [user] mfix_vars1(1207, _419246)
^  Unify: (273) [user] mfix_vars1(1207, _419246)
   Call: (274) [system] is_list(1207)
^  Redo: (273) [user] mfix_vars1(1207, _419246)
^  Unify: (273) [user] mfix_vars1(1207, _419246)
   Call: (274) [system] string(1207)
^  Redo: (273) [user] mfix_vars1(1207, _419246)
^  Unify: (273) [user] mfix_vars1(1207, _419246)
   Call: (274) [system] compound(1207)
^  Redo: (273) [user] mfix_vars1(1207, _419246)
^  Unify: (273) [user] mfix_vars1(1207, _419246)
^  Call: (274) [user] symbol(1207)
^  Unify: (274) [user] symbol(1207)
   Call: (275) [system] atom(1207)
   Fail: (275) [system] atom(1207)
^  Fail: (274) [user] symbol(1207)
^  Redo: (273) [user] mfix_vars1(1207, _419246)
   Call: (274) [system] 1207=_419246
   Exit: (274) [system] 1207=1207
^  Exit: (273) [user] mfix_vars1(1207, 1207)
   Call: (273) [apply] apply:maplist_([0], _419248, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_453572|_453574], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _453572)
^  Unify: (274) [user] mfix_vars1(0, _453572)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _453572)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_458218))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _453572)
^  Unify: (274) [user] mfix_vars1(0, _453572)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _453572)
^  Unify: (274) [user] mfix_vars1(0, _453572)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _453572)
^  Unify: (274) [user] mfix_vars1(0, _453572)
   Call: (275) [system] 0==[_467498, _467504]
^  Redo: (274) [user] mfix_vars1(0, _453572)
^  Unify: (274) [user] mfix_vars1(0, _453572)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _453572)
^  Unify: (274) [user] mfix_vars1(0, _453572)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _453572)
^  Unify: (274) [user] mfix_vars1(0, _453572)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _453572)
^  Unify: (274) [user] mfix_vars1(0, _453572)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _453572)
   Call: (275) [system] 0=_453572
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _453574, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1207, 0], [1207, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         !(pragma! interpreter bare-minimal)", 1207, 0], [";;         !(pragma! interpreter bare-minimal)", 1207, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(pragma! interpreter bare-minimal)", 1207, 0], [";;         !(pragma! interpreter bare-minimal)", 1207, 0])
   Call: (270) [system] compound_name_arguments(_347746, '$COMMENT', [";;         !(pragma! interpreter bare-minimal)", 1207, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT', [";;         !(pragma! interpreter bare-minimal)", 1207, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0)\=@='$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _342160)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _503746))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _503746))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _503746))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _503746))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _503746)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _503746)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _509332))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _509332))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _509332)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _509332)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _509332)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0)\=@='$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _503746)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _5952))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _5952))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _5952))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _5952))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _5952)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _13782))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _13782))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _13782)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _13782)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _13782)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0)\=@='$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0)))
   Call: (261) [system] '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0)\=@='$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _42560, [], _42562)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _42560, [], _42562)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _42560, [], _42562)
   Call: (258) [system] atom('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _42560, [], _42562)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _42560, [], _42562)
   Call: (258) [system] compound('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), _51876, _51878)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT', [";;         !(pragma! interpreter bare-minimal)", 1207, 0])
^  Call: (258) [user] subst_vars([";;         !(pragma! interpreter bare-minimal)", 1207, 0], _53762, [], _42562)
^  Unify: (258) [user] subst_vars([";;         !(pragma! interpreter bare-minimal)", 1207, 0], [";;         !(pragma! interpreter bare-minimal)", 1207, 0], [], [])
   Call: (259) [system] var([";;         !(pragma! interpreter bare-minimal)", 1207, 0])
^  Redo: (258) [user] subst_vars([";;         !(pragma! interpreter bare-minimal)", 1207, 0], _53762, [], _42562)
^  Unify: (258) [user] subst_vars([";;         !(pragma! interpreter bare-minimal)", 1207, 0], [_57498|_57500], [], _42562)
^  Call: (259) [user] subst_vars(";;         !(pragma! interpreter bare-minimal)", _57498, [], _58438)
^  Unify: (259) [user] subst_vars(";;         !(pragma! interpreter bare-minimal)", ";;         !(pragma! interpreter bare-minimal)", [], [])
   Call: (260) [system] var(";;         !(pragma! interpreter bare-minimal)")
^  Redo: (259) [user] subst_vars(";;         !(pragma! interpreter bare-minimal)", _57498, [], _58438)
^  Unify: (259) [user] subst_vars(";;         !(pragma! interpreter bare-minimal)", _57498, [], _58438)
   Call: (260) [system] atom(";;         !(pragma! interpreter bare-minimal)")
^  Redo: (259) [user] subst_vars(";;         !(pragma! interpreter bare-minimal)", _57498, [], _58438)
^  Unify: (259) [user] subst_vars(";;         !(pragma! interpreter bare-minimal)", _57498, [], _58438)
   Call: (260) [system] compound(";;         !(pragma! interpreter bare-minimal)")
^  Redo: (259) [user] subst_vars(";;         !(pragma! interpreter bare-minimal)", _57498, [], _58438)
^  Unify: (259) [user] subst_vars(";;         !(pragma! interpreter bare-minimal)", ";;         !(pragma! interpreter bare-minimal)", [], [])
^  Exit: (259) [user] subst_vars(";;         !(pragma! interpreter bare-minimal)", ";;         !(pragma! interpreter bare-minimal)", [], [])
^  Call: (259) [user] subst_vars([1207, 0], _57500, [], _42562)
^  Unify: (259) [user] subst_vars([1207, 0], [1207, 0], [], [])
   Call: (260) [system] var([1207, 0])
^  Redo: (259) [user] subst_vars([1207, 0], _57500, [], _42562)
^  Unify: (259) [user] subst_vars([1207, 0], [_73370|_73372], [], _42562)
^  Call: (260) [user] subst_vars(1207, _73370, [], _74310)
^  Unify: (260) [user] subst_vars(1207, 1207, [], [])
   Call: (261) [system] var(1207)
^  Redo: (260) [user] subst_vars(1207, _73370, [], _74310)
^  Unify: (260) [user] subst_vars(1207, _73370, [], _74310)
   Call: (261) [system] atom(1207)
^  Redo: (260) [user] subst_vars(1207, _73370, [], _74310)
^  Unify: (260) [user] subst_vars(1207, _73370, [], _74310)
   Call: (261) [system] compound(1207)
^  Redo: (260) [user] subst_vars(1207, _73370, [], _74310)
^  Unify: (260) [user] subst_vars(1207, 1207, [], [])
^  Exit: (260) [user] subst_vars(1207, 1207, [], [])
^  Call: (260) [user] subst_vars([0], _73372, [], _42562)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _73372, [], _42562)
^  Unify: (260) [user] subst_vars([0], [_89242|_89244], [], _42562)
^  Call: (261) [user] subst_vars(0, _89242, [], _90182)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _89242, [], _90182)
^  Unify: (261) [user] subst_vars(0, _89242, [], _90182)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _89242, [], _90182)
^  Unify: (261) [user] subst_vars(0, _89242, [], _90182)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _89242, [], _90182)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _89244, [], _42562)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _89244, [], _42562)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1207, 0], [1207, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         !(pragma! interpreter bare-minimal)", 1207, 0], [";;         !(pragma! interpreter bare-minimal)", 1207, 0], [], [])
   Call: (258) [system] compound_name_arguments(_42560, '$COMMENT', [";;         !(pragma! interpreter bare-minimal)", 1207, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT', [";;         !(pragma! interpreter bare-minimal)", 1207, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), [], [])
   Call: (257) [system] _112600=metta_file_buffer(+, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(pragma! interpreter bare-minimal)", 1207, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1208, 0, 44040, '$COMMENT'(";;         !(foo)", 1208, 0), '$stream_position'(44040, 1208, 0, 44040)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(foo)", 1208, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(foo)", 1208, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         !(foo)", 1208, 0), _165320))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(foo)", 1208, 0), _165320))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         !(foo)", 1208, 0), _165320)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(foo)", 1208, 0), _165320)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         !(foo)", 1208, 0), _165320)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         !(foo)", 1208, 0), _165320)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         !(foo)", 1208, 0), _170932))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(foo)", 1208, 0), _170932))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(foo)", 1208, 0), _170932))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(foo)", 1208, 0), _170932))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(foo)", 1208, 0), _170932)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(foo)", 1208, 0), _170932)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         !(foo)", 1208, 0), _176518))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(foo)", 1208, 0), _176518))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         !(foo)", 1208, 0), _176518)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(foo)", 1208, 0), _176518)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1208, 0), _176518)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1208, 0), _176518)
   Call: (270) [system] var('$COMMENT'(";;         !(foo)", 1208, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1208, 0), _176518)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1208, 0), '$VAR'(_183978))
   Call: (270) [system] atom('$COMMENT'(";;         !(foo)", 1208, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1208, 0), _176518)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1208, 0), _176518)
   Call: (270) [system] '$COMMENT'(";;         !(foo)", 1208, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1208, 0), _176518)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1208, 0), _176518)
   Call: (270) [system] '$COMMENT'(";;         !(foo)", 1208, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1208, 0), _176518)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1208, 0), _176518)
   Call: (270) [system] '$COMMENT'(";;         !(foo)", 1208, 0)==[_193258, _193264]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1208, 0), _176518)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1208, 0), _176518)
   Call: (270) [system] is_list('$COMMENT'(";;         !(foo)", 1208, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1208, 0), _176518)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1208, 0), _176518)
   Call: (270) [system] string('$COMMENT'(";;         !(foo)", 1208, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1208, 0), _176518)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1208, 0), _176518)
   Call: (270) [system] compound('$COMMENT'(";;         !(foo)", 1208, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         !(foo)", 1208, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         !(foo)", 1208, 0), _203460, _203462)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT', [";;         !(foo)", 1208, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         !(foo)", 1208, 0], _207202)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(foo)", 1208, 0], _207202)
   Call: (271) [apply] apply:maplist_([";;         !(foo)", 1208, 0], _207202, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         !(foo)", 1208, 0], [_210020|_210022], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         !(foo)", _210020)
^  Unify: (272) [user] mfix_vars1(";;         !(foo)", _210020)
   Call: (273) [system] var(";;         !(foo)")
^  Redo: (272) [user] mfix_vars1(";;         !(foo)", _210020)
^  Unify: (272) [user] mfix_vars1(";;         !(foo)", '$VAR'(_214666))
   Call: (273) [system] atom(";;         !(foo)")
^  Redo: (272) [user] mfix_vars1(";;         !(foo)", _210020)
^  Unify: (272) [user] mfix_vars1(";;         !(foo)", _210020)
   Call: (273) [system] ";;         !(foo)"==true
^  Redo: (272) [user] mfix_vars1(";;         !(foo)", _210020)
^  Unify: (272) [user] mfix_vars1(";;         !(foo)", _210020)
   Call: (273) [system] ";;         !(foo)"==false
^  Redo: (272) [user] mfix_vars1(";;         !(foo)", _210020)
^  Unify: (272) [user] mfix_vars1(";;         !(foo)", _210020)
   Call: (273) [system] ";;         !(foo)"==[_223946, _223952]
^  Redo: (272) [user] mfix_vars1(";;         !(foo)", _210020)
^  Unify: (272) [user] mfix_vars1(";;         !(foo)", _210020)
   Call: (273) [system] is_list(";;         !(foo)")
^  Redo: (272) [user] mfix_vars1(";;         !(foo)", _210020)
^  Unify: (272) [user] mfix_vars1(";;         !(foo)", _210020)
   Call: (273) [system] string(";;         !(foo)")
   Exit: (273) [system] string(";;         !(foo)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         !(foo)", _210020)
^  Unify: (272) [user] mfix_vars1(";;         !(foo)", _210020)
   Call: (273) [system] compound(";;         !(foo)")
^  Redo: (272) [user] mfix_vars1(";;         !(foo)", _210020)
^  Unify: (272) [user] mfix_vars1(";;         !(foo)", _210020)
^  Call: (273) [user] symbol(";;         !(foo)")
^  Unify: (273) [user] symbol(";;         !(foo)")
   Call: (274) [system] atom(";;         !(foo)")
   Fail: (274) [system] atom(";;         !(foo)")
^  Fail: (273) [user] symbol(";;         !(foo)")
^  Redo: (272) [user] mfix_vars1(";;         !(foo)", _210020)
   Call: (273) [system] ";;         !(foo)"=_210020
   Exit: (273) [system] ";;         !(foo)"=";;         !(foo)"
^  Exit: (272) [user] mfix_vars1(";;         !(foo)", ";;         !(foo)")
   Call: (272) [apply] apply:maplist_([1208, 0], _210022, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1208, 0], [_248018|_248020], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1208, _248018)
^  Unify: (273) [user] mfix_vars1(1208, _248018)
   Call: (274) [system] var(1208)
^  Redo: (273) [user] mfix_vars1(1208, _248018)
^  Unify: (273) [user] mfix_vars1(1208, '$VAR'(_252664))
   Call: (274) [system] atom(1208)
^  Redo: (273) [user] mfix_vars1(1208, _248018)
^  Unify: (273) [user] mfix_vars1(1208, _248018)
   Call: (274) [system] 1208==true
^  Redo: (273) [user] mfix_vars1(1208, _248018)
^  Unify: (273) [user] mfix_vars1(1208, _248018)
   Call: (274) [system] 1208==false
^  Redo: (273) [user] mfix_vars1(1208, _248018)
^  Unify: (273) [user] mfix_vars1(1208, _248018)
   Call: (274) [system] 1208==[_261944, _261950]
^  Redo: (273) [user] mfix_vars1(1208, _248018)
^  Unify: (273) [user] mfix_vars1(1208, _248018)
   Call: (274) [system] is_list(1208)
^  Redo: (273) [user] mfix_vars1(1208, _248018)
^  Unify: (273) [user] mfix_vars1(1208, _248018)
   Call: (274) [system] string(1208)
^  Redo: (273) [user] mfix_vars1(1208, _248018)
^  Unify: (273) [user] mfix_vars1(1208, _248018)
   Call: (274) [system] compound(1208)
^  Redo: (273) [user] mfix_vars1(1208, _248018)
^  Unify: (273) [user] mfix_vars1(1208, _248018)
^  Call: (274) [user] symbol(1208)
^  Unify: (274) [user] symbol(1208)
   Call: (275) [system] atom(1208)
   Fail: (275) [system] atom(1208)
^  Fail: (274) [user] symbol(1208)
^  Redo: (273) [user] mfix_vars1(1208, _248018)
   Call: (274) [system] 1208=_248018
   Exit: (274) [system] 1208=1208
^  Exit: (273) [user] mfix_vars1(1208, 1208)
   Call: (273) [apply] apply:maplist_([0], _248020, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_282344|_282346], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _282344)
^  Unify: (274) [user] mfix_vars1(0, _282344)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _282344)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_286990))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _282344)
^  Unify: (274) [user] mfix_vars1(0, _282344)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _282344)
^  Unify: (274) [user] mfix_vars1(0, _282344)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _282344)
^  Unify: (274) [user] mfix_vars1(0, _282344)
   Call: (275) [system] 0==[_296270, _296276]
^  Redo: (274) [user] mfix_vars1(0, _282344)
^  Unify: (274) [user] mfix_vars1(0, _282344)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _282344)
^  Unify: (274) [user] mfix_vars1(0, _282344)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _282344)
^  Unify: (274) [user] mfix_vars1(0, _282344)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _282344)
^  Unify: (274) [user] mfix_vars1(0, _282344)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _282344)
   Call: (275) [system] 0=_282344
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _282346, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1208, 0], [1208, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         !(foo)", 1208, 0], [";;         !(foo)", 1208, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(foo)", 1208, 0], [";;         !(foo)", 1208, 0])
   Call: (270) [system] compound_name_arguments(_176518, '$COMMENT', [";;         !(foo)", 1208, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT', [";;         !(foo)", 1208, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(foo)", 1208, 0)\=@='$COMMENT'(";;         !(foo)", 1208, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(foo)", 1208, 0), _170932)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         !(foo)", 1208, 0), _332518))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(foo)", 1208, 0), _332518))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         !(foo)", 1208, 0), _332518))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(foo)", 1208, 0), _332518))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(foo)", 1208, 0), _332518)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(foo)", 1208, 0), _332518)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         !(foo)", 1208, 0), _338104))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(foo)", 1208, 0), _338104))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         !(foo)", 1208, 0), _338104)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(foo)", 1208, 0), _338104)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         !(foo)", 1208, 0), _338104)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(foo)", 1208, 0)\=@='$COMMENT'(";;         !(foo)", 1208, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(foo)", 1208, 0), _332518)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         !(foo)", 1208, 0), _165320))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(foo)", 1208, 0), _165320))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         !(foo)", 1208, 0), _165320))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(foo)", 1208, 0), _165320))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(foo)", 1208, 0), _165320)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(foo)", 1208, 0), _165320)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         !(foo)", 1208, 0), _360424))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(foo)", 1208, 0), _360424))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         !(foo)", 1208, 0), _360424)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(foo)", 1208, 0), _360424)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         !(foo)", 1208, 0), _360424)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(foo)", 1208, 0)\=@='$COMMENT'(";;         !(foo)", 1208, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(foo)", 1208, 0), _165320)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0)))
   Call: (261) [system] '$COMMENT'(";;         !(foo)", 1208, 0)\=@='$COMMENT'(";;         !(foo)", 1208, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(foo)", 1208, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(foo)", 1208, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(foo)", 1208, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(foo)", 1208, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(foo)", 1208, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         !(foo)", 1208, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         !(foo)", 1208, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         !(foo)", 1208, 0), _389202, [], _389204)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         !(foo)", 1208, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(foo)", 1208, 0), _389202, [], _389204)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(foo)", 1208, 0), _389202, [], _389204)
   Call: (258) [system] atom('$COMMENT'(";;         !(foo)", 1208, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(foo)", 1208, 0), _389202, [], _389204)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(foo)", 1208, 0), _389202, [], _389204)
   Call: (258) [system] compound('$COMMENT'(";;         !(foo)", 1208, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         !(foo)", 1208, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         !(foo)", 1208, 0), _398518, _398520)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT', [";;         !(foo)", 1208, 0])
^  Call: (258) [user] subst_vars([";;         !(foo)", 1208, 0], _400404, [], _389204)
^  Unify: (258) [user] subst_vars([";;         !(foo)", 1208, 0], [";;         !(foo)", 1208, 0], [], [])
   Call: (259) [system] var([";;         !(foo)", 1208, 0])
^  Redo: (258) [user] subst_vars([";;         !(foo)", 1208, 0], _400404, [], _389204)
^  Unify: (258) [user] subst_vars([";;         !(foo)", 1208, 0], [_404140|_404142], [], _389204)
^  Call: (259) [user] subst_vars(";;         !(foo)", _404140, [], _405080)
^  Unify: (259) [user] subst_vars(";;         !(foo)", ";;         !(foo)", [], [])
   Call: (260) [system] var(";;         !(foo)")
^  Redo: (259) [user] subst_vars(";;         !(foo)", _404140, [], _405080)
^  Unify: (259) [user] subst_vars(";;         !(foo)", _404140, [], _405080)
   Call: (260) [system] atom(";;         !(foo)")
^  Redo: (259) [user] subst_vars(";;         !(foo)", _404140, [], _405080)
^  Unify: (259) [user] subst_vars(";;         !(foo)", _404140, [], _405080)
   Call: (260) [system] compound(";;         !(foo)")
^  Redo: (259) [user] subst_vars(";;         !(foo)", _404140, [], _405080)
^  Unify: (259) [user] subst_vars(";;         !(foo)", ";;         !(foo)", [], [])
^  Exit: (259) [user] subst_vars(";;         !(foo)", ";;         !(foo)", [], [])
^  Call: (259) [user] subst_vars([1208, 0], _404142, [], _389204)
^  Unify: (259) [user] subst_vars([1208, 0], [1208, 0], [], [])
   Call: (260) [system] var([1208, 0])
^  Redo: (259) [user] subst_vars([1208, 0], _404142, [], _389204)
^  Unify: (259) [user] subst_vars([1208, 0], [_420012|_420014], [], _389204)
^  Call: (260) [user] subst_vars(1208, _420012, [], _420952)
^  Unify: (260) [user] subst_vars(1208, 1208, [], [])
   Call: (261) [system] var(1208)
^  Redo: (260) [user] subst_vars(1208, _420012, [], _420952)
^  Unify: (260) [user] subst_vars(1208, _420012, [], _420952)
   Call: (261) [system] atom(1208)
^  Redo: (260) [user] subst_vars(1208, _420012, [], _420952)
^  Unify: (260) [user] subst_vars(1208, _420012, [], _420952)
   Call: (261) [system] compound(1208)
^  Redo: (260) [user] subst_vars(1208, _420012, [], _420952)
^  Unify: (260) [user] subst_vars(1208, 1208, [], [])
^  Exit: (260) [user] subst_vars(1208, 1208, [], [])
^  Call: (260) [user] subst_vars([0], _420014, [], _389204)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _420014, [], _389204)
^  Unify: (260) [user] subst_vars([0], [_435884|_435886], [], _389204)
^  Call: (261) [user] subst_vars(0, _435884, [], _436824)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _435884, [], _436824)
^  Unify: (261) [user] subst_vars(0, _435884, [], _436824)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _435884, [], _436824)
^  Unify: (261) [user] subst_vars(0, _435884, [], _436824)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _435884, [], _436824)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _435886, [], _389204)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _435886, [], _389204)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1208, 0], [1208, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         !(foo)", 1208, 0], [";;         !(foo)", 1208, 0], [], [])
   Call: (258) [system] compound_name_arguments(_389202, '$COMMENT', [";;         !(foo)", 1208, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT', [";;         !(foo)", 1208, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         !(foo)", 1208, 0), '$COMMENT'(";;         !(foo)", 1208, 0), [], [])
   Call: (257) [system] _459242=metta_file_buffer(+, '$COMMENT'(";;         !(foo)", 1208, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         !(foo)", 1208, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         !(foo)", 1208, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(foo)", 1208, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(foo)", 1208, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(foo)", 1208, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(foo)", 1208, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(foo)", 1208, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(foo)", 1208, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1209, 0, 44058, '$COMMENT'(";;         !(eval (foo))", 1209, 0), '$stream_position'(44058, 1209, 0, 44058)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _511964))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _511964))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _511964)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _511964)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         !(eval (foo))", 1209, 0), _511964)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         !(eval (foo))", 1209, 0), _511964)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _517576))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _517576))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _517576))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _517576))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _517576)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _517576)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _523162))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _5982))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _5982)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _5982)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         !(eval (foo))", 1209, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(eval (foo))", 1209, 0), _5982)
   Call: (270) [system] var('$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(eval (foo))", 1209, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(eval (foo))", 1209, 0), '$VAR'(_12476))
   Call: (270) [system] atom('$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(eval (foo))", 1209, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(eval (foo))", 1209, 0), _5982)
   Call: (270) [system] '$COMMENT'(";;         !(eval (foo))", 1209, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(eval (foo))", 1209, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(eval (foo))", 1209, 0), _5982)
   Call: (270) [system] '$COMMENT'(";;         !(eval (foo))", 1209, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(eval (foo))", 1209, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(eval (foo))", 1209, 0), _5982)
   Call: (270) [system] '$COMMENT'(";;         !(eval (foo))", 1209, 0)==[_21756, _21762]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(eval (foo))", 1209, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(eval (foo))", 1209, 0), _5982)
   Call: (270) [system] is_list('$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(eval (foo))", 1209, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(eval (foo))", 1209, 0), _5982)
   Call: (270) [system] string('$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(eval (foo))", 1209, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(eval (foo))", 1209, 0), _5982)
   Call: (270) [system] compound('$COMMENT'(";;         !(eval (foo))", 1209, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         !(eval (foo))", 1209, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         !(eval (foo))", 1209, 0), _31958, _31960)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT', [";;         !(eval (foo))", 1209, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         !(eval (foo))", 1209, 0], _35700)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(eval (foo))", 1209, 0], _35700)
   Call: (271) [apply] apply:maplist_([";;         !(eval (foo))", 1209, 0], _35700, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         !(eval (foo))", 1209, 0], [_38518|_38520], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         !(eval (foo))", _38518)
^  Unify: (272) [user] mfix_vars1(";;         !(eval (foo))", _38518)
   Call: (273) [system] var(";;         !(eval (foo))")
^  Redo: (272) [user] mfix_vars1(";;         !(eval (foo))", _38518)
^  Unify: (272) [user] mfix_vars1(";;         !(eval (foo))", '$VAR'(_43164))
   Call: (273) [system] atom(";;         !(eval (foo))")
^  Redo: (272) [user] mfix_vars1(";;         !(eval (foo))", _38518)
^  Unify: (272) [user] mfix_vars1(";;         !(eval (foo))", _38518)
   Call: (273) [system] ";;         !(eval (foo))"==true
^  Redo: (272) [user] mfix_vars1(";;         !(eval (foo))", _38518)
^  Unify: (272) [user] mfix_vars1(";;         !(eval (foo))", _38518)
   Call: (273) [system] ";;         !(eval (foo))"==false
^  Redo: (272) [user] mfix_vars1(";;         !(eval (foo))", _38518)
^  Unify: (272) [user] mfix_vars1(";;         !(eval (foo))", _38518)
   Call: (273) [system] ";;         !(eval (foo))"==[_52444, _52450]
^  Redo: (272) [user] mfix_vars1(";;         !(eval (foo))", _38518)
^  Unify: (272) [user] mfix_vars1(";;         !(eval (foo))", _38518)
   Call: (273) [system] is_list(";;         !(eval (foo))")
^  Redo: (272) [user] mfix_vars1(";;         !(eval (foo))", _38518)
^  Unify: (272) [user] mfix_vars1(";;         !(eval (foo))", _38518)
   Call: (273) [system] string(";;         !(eval (foo))")
   Exit: (273) [system] string(";;         !(eval (foo))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         !(eval (foo))", _38518)
^  Unify: (272) [user] mfix_vars1(";;         !(eval (foo))", _38518)
   Call: (273) [system] compound(";;         !(eval (foo))")
^  Redo: (272) [user] mfix_vars1(";;         !(eval (foo))", _38518)
^  Unify: (272) [user] mfix_vars1(";;         !(eval (foo))", _38518)
^  Call: (273) [user] symbol(";;         !(eval (foo))")
^  Unify: (273) [user] symbol(";;         !(eval (foo))")
   Call: (274) [system] atom(";;         !(eval (foo))")
   Fail: (274) [system] atom(";;         !(eval (foo))")
^  Fail: (273) [user] symbol(";;         !(eval (foo))")
^  Redo: (272) [user] mfix_vars1(";;         !(eval (foo))", _38518)
   Call: (273) [system] ";;         !(eval (foo))"=_38518
   Exit: (273) [system] ";;         !(eval (foo))"=";;         !(eval (foo))"
^  Exit: (272) [user] mfix_vars1(";;         !(eval (foo))", ";;         !(eval (foo))")
   Call: (272) [apply] apply:maplist_([1209, 0], _38520, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1209, 0], [_76516|_76518], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1209, _76516)
^  Unify: (273) [user] mfix_vars1(1209, _76516)
   Call: (274) [system] var(1209)
^  Redo: (273) [user] mfix_vars1(1209, _76516)
^  Unify: (273) [user] mfix_vars1(1209, '$VAR'(_81162))
   Call: (274) [system] atom(1209)
^  Redo: (273) [user] mfix_vars1(1209, _76516)
^  Unify: (273) [user] mfix_vars1(1209, _76516)
   Call: (274) [system] 1209==true
^  Redo: (273) [user] mfix_vars1(1209, _76516)
^  Unify: (273) [user] mfix_vars1(1209, _76516)
   Call: (274) [system] 1209==false
^  Redo: (273) [user] mfix_vars1(1209, _76516)
^  Unify: (273) [user] mfix_vars1(1209, _76516)
   Call: (274) [system] 1209==[_90442, _90448]
^  Redo: (273) [user] mfix_vars1(1209, _76516)
^  Unify: (273) [user] mfix_vars1(1209, _76516)
   Call: (274) [system] is_list(1209)
^  Redo: (273) [user] mfix_vars1(1209, _76516)
^  Unify: (273) [user] mfix_vars1(1209, _76516)
   Call: (274) [system] string(1209)
^  Redo: (273) [user] mfix_vars1(1209, _76516)
^  Unify: (273) [user] mfix_vars1(1209, _76516)
   Call: (274) [system] compound(1209)
^  Redo: (273) [user] mfix_vars1(1209, _76516)
^  Unify: (273) [user] mfix_vars1(1209, _76516)
^  Call: (274) [user] symbol(1209)
^  Unify: (274) [user] symbol(1209)
   Call: (275) [system] atom(1209)
   Fail: (275) [system] atom(1209)
^  Fail: (274) [user] symbol(1209)
^  Redo: (273) [user] mfix_vars1(1209, _76516)
   Call: (274) [system] 1209=_76516
   Exit: (274) [system] 1209=1209
^  Exit: (273) [user] mfix_vars1(1209, 1209)
   Call: (273) [apply] apply:maplist_([0], _76518, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_110842|_110844], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _110842)
^  Unify: (274) [user] mfix_vars1(0, _110842)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _110842)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_115488))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _110842)
^  Unify: (274) [user] mfix_vars1(0, _110842)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _110842)
^  Unify: (274) [user] mfix_vars1(0, _110842)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _110842)
^  Unify: (274) [user] mfix_vars1(0, _110842)
   Call: (275) [system] 0==[_124768, _124774]
^  Redo: (274) [user] mfix_vars1(0, _110842)
^  Unify: (274) [user] mfix_vars1(0, _110842)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _110842)
^  Unify: (274) [user] mfix_vars1(0, _110842)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _110842)
^  Unify: (274) [user] mfix_vars1(0, _110842)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _110842)
^  Unify: (274) [user] mfix_vars1(0, _110842)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _110842)
   Call: (275) [system] 0=_110842
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _110844, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1209, 0], [1209, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         !(eval (foo))", 1209, 0], [";;         !(eval (foo))", 1209, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(eval (foo))", 1209, 0], [";;         !(eval (foo))", 1209, 0])
   Call: (270) [system] compound_name_arguments(_5982, '$COMMENT', [";;         !(eval (foo))", 1209, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT', [";;         !(eval (foo))", 1209, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(eval (foo))", 1209, 0)\=@='$COMMENT'(";;         !(eval (foo))", 1209, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _5968)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _161016))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _161016))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _161016))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _161016))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _161016)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _161016)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _166602))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _166602))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _166602)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _166602)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         !(eval (foo))", 1209, 0), _166602)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(eval (foo))", 1209, 0)\=@='$COMMENT'(";;         !(eval (foo))", 1209, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _161016)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _5948))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _5948))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _5948))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _5948))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _5948)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _188922))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _188922))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _188922)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _188922)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         !(eval (foo))", 1209, 0), _188922)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(eval (foo))", 1209, 0)\=@='$COMMENT'(";;         !(eval (foo))", 1209, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0)))
   Call: (261) [system] '$COMMENT'(";;         !(eval (foo))", 1209, 0)\=@='$COMMENT'(";;         !(eval (foo))", 1209, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(eval (foo))", 1209, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         !(eval (foo))", 1209, 0), _217700, [], _217702)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(eval (foo))", 1209, 0), _217700, [], _217702)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(eval (foo))", 1209, 0), _217700, [], _217702)
   Call: (258) [system] atom('$COMMENT'(";;         !(eval (foo))", 1209, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(eval (foo))", 1209, 0), _217700, [], _217702)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(eval (foo))", 1209, 0), _217700, [], _217702)
   Call: (258) [system] compound('$COMMENT'(";;         !(eval (foo))", 1209, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         !(eval (foo))", 1209, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         !(eval (foo))", 1209, 0), _227016, _227018)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT', [";;         !(eval (foo))", 1209, 0])
^  Call: (258) [user] subst_vars([";;         !(eval (foo))", 1209, 0], _228902, [], _217702)
^  Unify: (258) [user] subst_vars([";;         !(eval (foo))", 1209, 0], [";;         !(eval (foo))", 1209, 0], [], [])
   Call: (259) [system] var([";;         !(eval (foo))", 1209, 0])
^  Redo: (258) [user] subst_vars([";;         !(eval (foo))", 1209, 0], _228902, [], _217702)
^  Unify: (258) [user] subst_vars([";;         !(eval (foo))", 1209, 0], [_232638|_232640], [], _217702)
^  Call: (259) [user] subst_vars(";;         !(eval (foo))", _232638, [], _233578)
^  Unify: (259) [user] subst_vars(";;         !(eval (foo))", ";;         !(eval (foo))", [], [])
   Call: (260) [system] var(";;         !(eval (foo))")
^  Redo: (259) [user] subst_vars(";;         !(eval (foo))", _232638, [], _233578)
^  Unify: (259) [user] subst_vars(";;         !(eval (foo))", _232638, [], _233578)
   Call: (260) [system] atom(";;         !(eval (foo))")
^  Redo: (259) [user] subst_vars(";;         !(eval (foo))", _232638, [], _233578)
^  Unify: (259) [user] subst_vars(";;         !(eval (foo))", _232638, [], _233578)
   Call: (260) [system] compound(";;         !(eval (foo))")
^  Redo: (259) [user] subst_vars(";;         !(eval (foo))", _232638, [], _233578)
^  Unify: (259) [user] subst_vars(";;         !(eval (foo))", ";;         !(eval (foo))", [], [])
^  Exit: (259) [user] subst_vars(";;         !(eval (foo))", ";;         !(eval (foo))", [], [])
^  Call: (259) [user] subst_vars([1209, 0], _232640, [], _217702)
^  Unify: (259) [user] subst_vars([1209, 0], [1209, 0], [], [])
   Call: (260) [system] var([1209, 0])
^  Redo: (259) [user] subst_vars([1209, 0], _232640, [], _217702)
^  Unify: (259) [user] subst_vars([1209, 0], [_248510|_248512], [], _217702)
^  Call: (260) [user] subst_vars(1209, _248510, [], _249450)
^  Unify: (260) [user] subst_vars(1209, 1209, [], [])
   Call: (261) [system] var(1209)
^  Redo: (260) [user] subst_vars(1209, _248510, [], _249450)
^  Unify: (260) [user] subst_vars(1209, _248510, [], _249450)
   Call: (261) [system] atom(1209)
^  Redo: (260) [user] subst_vars(1209, _248510, [], _249450)
^  Unify: (260) [user] subst_vars(1209, _248510, [], _249450)
   Call: (261) [system] compound(1209)
^  Redo: (260) [user] subst_vars(1209, _248510, [], _249450)
^  Unify: (260) [user] subst_vars(1209, 1209, [], [])
^  Exit: (260) [user] subst_vars(1209, 1209, [], [])
^  Call: (260) [user] subst_vars([0], _248512, [], _217702)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _248512, [], _217702)
^  Unify: (260) [user] subst_vars([0], [_264382|_264384], [], _217702)
^  Call: (261) [user] subst_vars(0, _264382, [], _265322)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _264382, [], _265322)
^  Unify: (261) [user] subst_vars(0, _264382, [], _265322)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _264382, [], _265322)
^  Unify: (261) [user] subst_vars(0, _264382, [], _265322)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _264382, [], _265322)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _264384, [], _217702)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _264384, [], _217702)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1209, 0], [1209, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         !(eval (foo))", 1209, 0], [";;         !(eval (foo))", 1209, 0], [], [])
   Call: (258) [system] compound_name_arguments(_217700, '$COMMENT', [";;         !(eval (foo))", 1209, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT', [";;         !(eval (foo))", 1209, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         !(eval (foo))", 1209, 0), '$COMMENT'(";;         !(eval (foo))", 1209, 0), [], [])
   Call: (257) [system] _287740=metta_file_buffer(+, '$COMMENT'(";;         !(eval (foo))", 1209, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         !(eval (foo))", 1209, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         !(eval (foo))", 1209, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(eval (foo))", 1209, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(eval (foo))", 1209, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(eval (foo))", 1209, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(eval (foo))", 1209, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(eval (foo))", 1209, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(eval (foo))", 1209, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1210, 0, 44083, '$COMMENT'(";;     \";", 1210, 0), '$stream_position'(44083, 1210, 0, 44083)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \";", 1210, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \";", 1210, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     \";", 1210, 0), _340458))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     \";", 1210, 0), _340458))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     \";", 1210, 0), _340458)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     \";", 1210, 0), _340458)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     \";", 1210, 0), _340458)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     \";", 1210, 0), _340458)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     \";", 1210, 0), _346070))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     \";", 1210, 0), _346070))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     \";", 1210, 0), _346070))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     \";", 1210, 0), _346070))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \";", 1210, 0), _346070)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \";", 1210, 0), _346070)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     \";", 1210, 0), _351656))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     \";", 1210, 0), _351656))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     \";", 1210, 0), _351656)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     \";", 1210, 0), _351656)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1210, 0), _351656)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1210, 0), _351656)
   Call: (270) [system] var('$COMMENT'(";;     \";", 1210, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1210, 0), _351656)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1210, 0), '$VAR'(_359116))
   Call: (270) [system] atom('$COMMENT'(";;     \";", 1210, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1210, 0), _351656)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1210, 0), _351656)
   Call: (270) [system] '$COMMENT'(";;     \";", 1210, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1210, 0), _351656)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1210, 0), _351656)
   Call: (270) [system] '$COMMENT'(";;     \";", 1210, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1210, 0), _351656)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1210, 0), _351656)
   Call: (270) [system] '$COMMENT'(";;     \";", 1210, 0)==[_368396, _368402]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1210, 0), _351656)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1210, 0), _351656)
   Call: (270) [system] is_list('$COMMENT'(";;     \";", 1210, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1210, 0), _351656)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1210, 0), _351656)
   Call: (270) [system] string('$COMMENT'(";;     \";", 1210, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1210, 0), _351656)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1210, 0), _351656)
   Call: (270) [system] compound('$COMMENT'(";;     \";", 1210, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     \";", 1210, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     \";", 1210, 0), _378598, _378600)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     \";", 1210, 0), '$COMMENT', [";;     \";", 1210, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     \";", 1210, 0], _382340)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     \";", 1210, 0], _382340)
   Call: (271) [apply] apply:maplist_([";;     \";", 1210, 0], _382340, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     \";", 1210, 0], [_385158|_385160], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     \";", _385158)
^  Unify: (272) [user] mfix_vars1(";;     \";", _385158)
   Call: (273) [system] var(";;     \";")
^  Redo: (272) [user] mfix_vars1(";;     \";", _385158)
^  Unify: (272) [user] mfix_vars1(";;     \";", '$VAR'(_389804))
   Call: (273) [system] atom(";;     \";")
^  Redo: (272) [user] mfix_vars1(";;     \";", _385158)
^  Unify: (272) [user] mfix_vars1(";;     \";", _385158)
   Call: (273) [system] ";;     \";"==true
^  Redo: (272) [user] mfix_vars1(";;     \";", _385158)
^  Unify: (272) [user] mfix_vars1(";;     \";", _385158)
   Call: (273) [system] ";;     \";"==false
^  Redo: (272) [user] mfix_vars1(";;     \";", _385158)
^  Unify: (272) [user] mfix_vars1(";;     \";", _385158)
   Call: (273) [system] ";;     \";"==[_399084, _399090]
^  Redo: (272) [user] mfix_vars1(";;     \";", _385158)
^  Unify: (272) [user] mfix_vars1(";;     \";", _385158)
   Call: (273) [system] is_list(";;     \";")
^  Redo: (272) [user] mfix_vars1(";;     \";", _385158)
^  Unify: (272) [user] mfix_vars1(";;     \";", _385158)
   Call: (273) [system] string(";;     \";")
   Exit: (273) [system] string(";;     \";")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     \";", _385158)
^  Unify: (272) [user] mfix_vars1(";;     \";", _385158)
   Call: (273) [system] compound(";;     \";")
^  Redo: (272) [user] mfix_vars1(";;     \";", _385158)
^  Unify: (272) [user] mfix_vars1(";;     \";", _385158)
^  Call: (273) [user] symbol(";;     \";")
^  Unify: (273) [user] symbol(";;     \";")
   Call: (274) [system] atom(";;     \";")
   Fail: (274) [system] atom(";;     \";")
^  Fail: (273) [user] symbol(";;     \";")
^  Redo: (272) [user] mfix_vars1(";;     \";", _385158)
   Call: (273) [system] ";;     \";"=_385158
   Exit: (273) [system] ";;     \";"=";;     \";"
^  Exit: (272) [user] mfix_vars1(";;     \";", ";;     \";")
   Call: (272) [apply] apply:maplist_([1210, 0], _385160, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1210, 0], [_423156|_423158], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1210, _423156)
^  Unify: (273) [user] mfix_vars1(1210, _423156)
   Call: (274) [system] var(1210)
^  Redo: (273) [user] mfix_vars1(1210, _423156)
^  Unify: (273) [user] mfix_vars1(1210, '$VAR'(_427802))
   Call: (274) [system] atom(1210)
^  Redo: (273) [user] mfix_vars1(1210, _423156)
^  Unify: (273) [user] mfix_vars1(1210, _423156)
   Call: (274) [system] 1210==true
^  Redo: (273) [user] mfix_vars1(1210, _423156)
^  Unify: (273) [user] mfix_vars1(1210, _423156)
   Call: (274) [system] 1210==false
^  Redo: (273) [user] mfix_vars1(1210, _423156)
^  Unify: (273) [user] mfix_vars1(1210, _423156)
   Call: (274) [system] 1210==[_437082, _437088]
^  Redo: (273) [user] mfix_vars1(1210, _423156)
^  Unify: (273) [user] mfix_vars1(1210, _423156)
   Call: (274) [system] is_list(1210)
^  Redo: (273) [user] mfix_vars1(1210, _423156)
^  Unify: (273) [user] mfix_vars1(1210, _423156)
   Call: (274) [system] string(1210)
^  Redo: (273) [user] mfix_vars1(1210, _423156)
^  Unify: (273) [user] mfix_vars1(1210, _423156)
   Call: (274) [system] compound(1210)
^  Redo: (273) [user] mfix_vars1(1210, _423156)
^  Unify: (273) [user] mfix_vars1(1210, _423156)
^  Call: (274) [user] symbol(1210)
^  Unify: (274) [user] symbol(1210)
   Call: (275) [system] atom(1210)
   Fail: (275) [system] atom(1210)
^  Fail: (274) [user] symbol(1210)
^  Redo: (273) [user] mfix_vars1(1210, _423156)
   Call: (274) [system] 1210=_423156
   Exit: (274) [system] 1210=1210
^  Exit: (273) [user] mfix_vars1(1210, 1210)
   Call: (273) [apply] apply:maplist_([0], _423158, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_457482|_457484], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _457482)
^  Unify: (274) [user] mfix_vars1(0, _457482)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _457482)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_462128))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _457482)
^  Unify: (274) [user] mfix_vars1(0, _457482)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _457482)
^  Unify: (274) [user] mfix_vars1(0, _457482)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _457482)
^  Unify: (274) [user] mfix_vars1(0, _457482)
   Call: (275) [system] 0==[_471408, _471414]
^  Redo: (274) [user] mfix_vars1(0, _457482)
^  Unify: (274) [user] mfix_vars1(0, _457482)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _457482)
^  Unify: (274) [user] mfix_vars1(0, _457482)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _457482)
^  Unify: (274) [user] mfix_vars1(0, _457482)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _457482)
^  Unify: (274) [user] mfix_vars1(0, _457482)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _457482)
   Call: (275) [system] 0=_457482
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _457484, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1210, 0], [1210, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     \";", 1210, 0], [";;     \";", 1210, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     \";", 1210, 0], [";;     \";", 1210, 0])
   Call: (270) [system] compound_name_arguments(_351656, '$COMMENT', [";;     \";", 1210, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     \";", 1210, 0), '$COMMENT', [";;     \";", 1210, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0)))
   Call: (267) [system] '$COMMENT'(";;     \";", 1210, 0)\=@='$COMMENT'(";;     \";", 1210, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \";", 1210, 0), _346070)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     \";", 1210, 0), _507656))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     \";", 1210, 0), _507656))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     \";", 1210, 0), _507656))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     \";", 1210, 0), _507656))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \";", 1210, 0), _507656)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \";", 1210, 0), _507656)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     \";", 1210, 0), _513242))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     \";", 1210, 0), _513242))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     \";", 1210, 0), _513242)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     \";", 1210, 0), _513242)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     \";", 1210, 0), _513242)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0)))
   Call: (267) [system] '$COMMENT'(";;     \";", 1210, 0)\=@='$COMMENT'(";;     \";", 1210, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \";", 1210, 0), _5966)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     \";", 1210, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     \";", 1210, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     \";", 1210, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     \";", 1210, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \";", 1210, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \";", 1210, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     \";", 1210, 0), _17680))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     \";", 1210, 0), _17680))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     \";", 1210, 0), _17680)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     \";", 1210, 0), _17680)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     \";", 1210, 0), _17680)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0)))
   Call: (267) [system] '$COMMENT'(";;     \";", 1210, 0)\=@='$COMMENT'(";;     \";", 1210, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \";", 1210, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0)))
   Call: (261) [system] '$COMMENT'(";;     \";", 1210, 0)\=@='$COMMENT'(";;     \";", 1210, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \";", 1210, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1210, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1210, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1210, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1210, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1210, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     \";", 1210, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     \";", 1210, 0), _46458, [], _46460)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     \";", 1210, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     \";", 1210, 0), _46458, [], _46460)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \";", 1210, 0), _46458, [], _46460)
   Call: (258) [system] atom('$COMMENT'(";;     \";", 1210, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     \";", 1210, 0), _46458, [], _46460)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \";", 1210, 0), _46458, [], _46460)
   Call: (258) [system] compound('$COMMENT'(";;     \";", 1210, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     \";", 1210, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     \";", 1210, 0), _55774, _55776)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     \";", 1210, 0), '$COMMENT', [";;     \";", 1210, 0])
^  Call: (258) [user] subst_vars([";;     \";", 1210, 0], _57660, [], _46460)
^  Unify: (258) [user] subst_vars([";;     \";", 1210, 0], [";;     \";", 1210, 0], [], [])
   Call: (259) [system] var([";;     \";", 1210, 0])
^  Redo: (258) [user] subst_vars([";;     \";", 1210, 0], _57660, [], _46460)
^  Unify: (258) [user] subst_vars([";;     \";", 1210, 0], [_61396|_61398], [], _46460)
^  Call: (259) [user] subst_vars(";;     \";", _61396, [], _62336)
^  Unify: (259) [user] subst_vars(";;     \";", ";;     \";", [], [])
   Call: (260) [system] var(";;     \";")
^  Redo: (259) [user] subst_vars(";;     \";", _61396, [], _62336)
^  Unify: (259) [user] subst_vars(";;     \";", _61396, [], _62336)
   Call: (260) [system] atom(";;     \";")
^  Redo: (259) [user] subst_vars(";;     \";", _61396, [], _62336)
^  Unify: (259) [user] subst_vars(";;     \";", _61396, [], _62336)
   Call: (260) [system] compound(";;     \";")
^  Redo: (259) [user] subst_vars(";;     \";", _61396, [], _62336)
^  Unify: (259) [user] subst_vars(";;     \";", ";;     \";", [], [])
^  Exit: (259) [user] subst_vars(";;     \";", ";;     \";", [], [])
^  Call: (259) [user] subst_vars([1210, 0], _61398, [], _46460)
^  Unify: (259) [user] subst_vars([1210, 0], [1210, 0], [], [])
   Call: (260) [system] var([1210, 0])
^  Redo: (259) [user] subst_vars([1210, 0], _61398, [], _46460)
^  Unify: (259) [user] subst_vars([1210, 0], [_77268|_77270], [], _46460)
^  Call: (260) [user] subst_vars(1210, _77268, [], _78208)
^  Unify: (260) [user] subst_vars(1210, 1210, [], [])
   Call: (261) [system] var(1210)
^  Redo: (260) [user] subst_vars(1210, _77268, [], _78208)
^  Unify: (260) [user] subst_vars(1210, _77268, [], _78208)
   Call: (261) [system] atom(1210)
^  Redo: (260) [user] subst_vars(1210, _77268, [], _78208)
^  Unify: (260) [user] subst_vars(1210, _77268, [], _78208)
   Call: (261) [system] compound(1210)
^  Redo: (260) [user] subst_vars(1210, _77268, [], _78208)
^  Unify: (260) [user] subst_vars(1210, 1210, [], [])
^  Exit: (260) [user] subst_vars(1210, 1210, [], [])
^  Call: (260) [user] subst_vars([0], _77270, [], _46460)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _77270, [], _46460)
^  Unify: (260) [user] subst_vars([0], [_93140|_93142], [], _46460)
^  Call: (261) [user] subst_vars(0, _93140, [], _94080)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _93140, [], _94080)
^  Unify: (261) [user] subst_vars(0, _93140, [], _94080)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _93140, [], _94080)
^  Unify: (261) [user] subst_vars(0, _93140, [], _94080)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _93140, [], _94080)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _93142, [], _46460)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _93142, [], _46460)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1210, 0], [1210, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     \";", 1210, 0], [";;     \";", 1210, 0], [], [])
   Call: (258) [system] compound_name_arguments(_46458, '$COMMENT', [";;     \";", 1210, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     \";", 1210, 0), '$COMMENT', [";;     \";", 1210, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     \";", 1210, 0), '$COMMENT'(";;     \";", 1210, 0), [], [])
   Call: (257) [system] _116498=metta_file_buffer(+, '$COMMENT'(";;     \";", 1210, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     \";", 1210, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     \";", 1210, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     \";", 1210, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     \";", 1210, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \";", 1210, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \";", 1210, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \";", 1210, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \";", 1210, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1211, 0, 44093, '$COMMENT'(";;", 1211, 0), '$stream_position'(44093, 1211, 0, 44093)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1211, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1211, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1211, 0), _169214))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1211, 0), _169214))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1211, 0), _169214)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1211, 0), _169214)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1211, 0), _169214)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1211, 0), _169214)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1211, 0), _174826))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1211, 0), _174826))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1211, 0), _174826))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1211, 0), _174826))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1211, 0), _174826)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1211, 0), _174826)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1211, 0), _180412))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1211, 0), _180412))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1211, 0), _180412)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1211, 0), _180412)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1211, 0), _180412)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1211, 0), _180412)
   Call: (270) [system] var('$COMMENT'(";;", 1211, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1211, 0), _180412)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1211, 0), '$VAR'(_187872))
   Call: (270) [system] atom('$COMMENT'(";;", 1211, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1211, 0), _180412)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1211, 0), _180412)
   Call: (270) [system] '$COMMENT'(";;", 1211, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1211, 0), _180412)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1211, 0), _180412)
   Call: (270) [system] '$COMMENT'(";;", 1211, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1211, 0), _180412)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1211, 0), _180412)
   Call: (270) [system] '$COMMENT'(";;", 1211, 0)==[_197152, _197158]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1211, 0), _180412)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1211, 0), _180412)
   Call: (270) [system] is_list('$COMMENT'(";;", 1211, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1211, 0), _180412)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1211, 0), _180412)
   Call: (270) [system] string('$COMMENT'(";;", 1211, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1211, 0), _180412)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1211, 0), _180412)
   Call: (270) [system] compound('$COMMENT'(";;", 1211, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1211, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1211, 0), _207354, _207356)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1211, 0), '$COMMENT', [";;", 1211, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1211, 0], _211096)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1211, 0], _211096)
   Call: (271) [apply] apply:maplist_([";;", 1211, 0], _211096, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1211, 0], [_213914|_213916], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _213914)
^  Unify: (272) [user] mfix_vars1(";;", _213914)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _213914)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_218560))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _213914)
^  Unify: (272) [user] mfix_vars1(";;", _213914)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _213914)
^  Unify: (272) [user] mfix_vars1(";;", _213914)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _213914)
^  Unify: (272) [user] mfix_vars1(";;", _213914)
   Call: (273) [system] ";;"==[_227840, _227846]
^  Redo: (272) [user] mfix_vars1(";;", _213914)
^  Unify: (272) [user] mfix_vars1(";;", _213914)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _213914)
^  Unify: (272) [user] mfix_vars1(";;", _213914)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _213914)
^  Unify: (272) [user] mfix_vars1(";;", _213914)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _213914)
^  Unify: (272) [user] mfix_vars1(";;", _213914)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _213914)
   Call: (273) [system] ";;"=_213914
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1211, 0], _213916, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1211, 0], [_251912|_251914], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1211, _251912)
^  Unify: (273) [user] mfix_vars1(1211, _251912)
   Call: (274) [system] var(1211)
^  Redo: (273) [user] mfix_vars1(1211, _251912)
^  Unify: (273) [user] mfix_vars1(1211, '$VAR'(_256558))
   Call: (274) [system] atom(1211)
^  Redo: (273) [user] mfix_vars1(1211, _251912)
^  Unify: (273) [user] mfix_vars1(1211, _251912)
   Call: (274) [system] 1211==true
^  Redo: (273) [user] mfix_vars1(1211, _251912)
^  Unify: (273) [user] mfix_vars1(1211, _251912)
   Call: (274) [system] 1211==false
^  Redo: (273) [user] mfix_vars1(1211, _251912)
^  Unify: (273) [user] mfix_vars1(1211, _251912)
   Call: (274) [system] 1211==[_265838, _265844]
^  Redo: (273) [user] mfix_vars1(1211, _251912)
^  Unify: (273) [user] mfix_vars1(1211, _251912)
   Call: (274) [system] is_list(1211)
^  Redo: (273) [user] mfix_vars1(1211, _251912)
^  Unify: (273) [user] mfix_vars1(1211, _251912)
   Call: (274) [system] string(1211)
^  Redo: (273) [user] mfix_vars1(1211, _251912)
^  Unify: (273) [user] mfix_vars1(1211, _251912)
   Call: (274) [system] compound(1211)
^  Redo: (273) [user] mfix_vars1(1211, _251912)
^  Unify: (273) [user] mfix_vars1(1211, _251912)
^  Call: (274) [user] symbol(1211)
^  Unify: (274) [user] symbol(1211)
   Call: (275) [system] atom(1211)
   Fail: (275) [system] atom(1211)
^  Fail: (274) [user] symbol(1211)
^  Redo: (273) [user] mfix_vars1(1211, _251912)
   Call: (274) [system] 1211=_251912
   Exit: (274) [system] 1211=1211
^  Exit: (273) [user] mfix_vars1(1211, 1211)
   Call: (273) [apply] apply:maplist_([0], _251914, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_286238|_286240], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _286238)
^  Unify: (274) [user] mfix_vars1(0, _286238)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _286238)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_290884))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _286238)
^  Unify: (274) [user] mfix_vars1(0, _286238)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _286238)
^  Unify: (274) [user] mfix_vars1(0, _286238)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _286238)
^  Unify: (274) [user] mfix_vars1(0, _286238)
   Call: (275) [system] 0==[_300164, _300170]
^  Redo: (274) [user] mfix_vars1(0, _286238)
^  Unify: (274) [user] mfix_vars1(0, _286238)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _286238)
^  Unify: (274) [user] mfix_vars1(0, _286238)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _286238)
^  Unify: (274) [user] mfix_vars1(0, _286238)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _286238)
^  Unify: (274) [user] mfix_vars1(0, _286238)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _286238)
   Call: (275) [system] 0=_286238
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _286240, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1211, 0], [1211, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1211, 0], [";;", 1211, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1211, 0], [";;", 1211, 0])
   Call: (270) [system] compound_name_arguments(_180412, '$COMMENT', [";;", 1211, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1211, 0), '$COMMENT', [";;", 1211, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1211, 0)\=@='$COMMENT'(";;", 1211, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1211, 0), _174826)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1211, 0), _336412))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1211, 0), _336412))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1211, 0), _336412))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1211, 0), _336412))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1211, 0), _336412)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1211, 0), _336412)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1211, 0), _341998))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1211, 0), _341998))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1211, 0), _341998)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1211, 0), _341998)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1211, 0), _341998)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1211, 0)\=@='$COMMENT'(";;", 1211, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1211, 0), _336412)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1211, 0), _169214))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1211, 0), _169214))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1211, 0), _169214))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1211, 0), _169214))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1211, 0), _169214)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1211, 0), _169214)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1211, 0), _364318))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1211, 0), _364318))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1211, 0), _364318)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1211, 0), _364318)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1211, 0), _364318)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1211, 0)\=@='$COMMENT'(";;", 1211, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1211, 0), _169214)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1211, 0)\=@='$COMMENT'(";;", 1211, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1211, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1211, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1211, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1211, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1211, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1211, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1211, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1211, 0), _393096, [], _393098)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1211, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1211, 0), _393096, [], _393098)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1211, 0), _393096, [], _393098)
   Call: (258) [system] atom('$COMMENT'(";;", 1211, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1211, 0), _393096, [], _393098)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1211, 0), _393096, [], _393098)
   Call: (258) [system] compound('$COMMENT'(";;", 1211, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1211, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1211, 0), _402412, _402414)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1211, 0), '$COMMENT', [";;", 1211, 0])
^  Call: (258) [user] subst_vars([";;", 1211, 0], _404298, [], _393098)
^  Unify: (258) [user] subst_vars([";;", 1211, 0], [";;", 1211, 0], [], [])
   Call: (259) [system] var([";;", 1211, 0])
^  Redo: (258) [user] subst_vars([";;", 1211, 0], _404298, [], _393098)
^  Unify: (258) [user] subst_vars([";;", 1211, 0], [_408034|_408036], [], _393098)
^  Call: (259) [user] subst_vars(";;", _408034, [], _408974)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _408034, [], _408974)
^  Unify: (259) [user] subst_vars(";;", _408034, [], _408974)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _408034, [], _408974)
^  Unify: (259) [user] subst_vars(";;", _408034, [], _408974)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _408034, [], _408974)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1211, 0], _408036, [], _393098)
^  Unify: (259) [user] subst_vars([1211, 0], [1211, 0], [], [])
   Call: (260) [system] var([1211, 0])
^  Redo: (259) [user] subst_vars([1211, 0], _408036, [], _393098)
^  Unify: (259) [user] subst_vars([1211, 0], [_423906|_423908], [], _393098)
^  Call: (260) [user] subst_vars(1211, _423906, [], _424846)
^  Unify: (260) [user] subst_vars(1211, 1211, [], [])
   Call: (261) [system] var(1211)
^  Redo: (260) [user] subst_vars(1211, _423906, [], _424846)
^  Unify: (260) [user] subst_vars(1211, _423906, [], _424846)
   Call: (261) [system] atom(1211)
^  Redo: (260) [user] subst_vars(1211, _423906, [], _424846)
^  Unify: (260) [user] subst_vars(1211, _423906, [], _424846)
   Call: (261) [system] compound(1211)
^  Redo: (260) [user] subst_vars(1211, _423906, [], _424846)
^  Unify: (260) [user] subst_vars(1211, 1211, [], [])
^  Exit: (260) [user] subst_vars(1211, 1211, [], [])
^  Call: (260) [user] subst_vars([0], _423908, [], _393098)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _423908, [], _393098)
^  Unify: (260) [user] subst_vars([0], [_439778|_439780], [], _393098)
^  Call: (261) [user] subst_vars(0, _439778, [], _440718)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _439778, [], _440718)
^  Unify: (261) [user] subst_vars(0, _439778, [], _440718)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _439778, [], _440718)
^  Unify: (261) [user] subst_vars(0, _439778, [], _440718)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _439778, [], _440718)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _439780, [], _393098)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _439780, [], _393098)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1211, 0], [1211, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1211, 0], [";;", 1211, 0], [], [])
   Call: (258) [system] compound_name_arguments(_393096, '$COMMENT', [";;", 1211, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1211, 0), '$COMMENT', [";;", 1211, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1211, 0), '$COMMENT'(";;", 1211, 0), [], [])
   Call: (257) [system] _463136=metta_file_buffer(+, '$COMMENT'(";;", 1211, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1211, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1211, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1211, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1211, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1211, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1211, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1211, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1211, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1212, 0, 44096, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$stream_position'(44096, 1212, 0, 44096)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _515864))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _515864))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _515864)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _515864)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _515864)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _515864)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _521476))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _521476))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _5974))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _5974))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _5974)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _5974)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _9132))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _9132))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _9132)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _9132)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _9132)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _9132)
   Call: (270) [system] var('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _9132)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$VAR'(_16592))
   Call: (270) [system] atom('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _9132)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _9132)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _9132)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _9132)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _9132)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _9132)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0)==[_25872, _25878]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _9132)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _9132)
   Call: (270) [system] is_list('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _9132)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _9132)
   Call: (270) [system] string('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _9132)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _9132)
   Call: (270) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _36074, _36076)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT', [";;     assert_eq_metta_results!(run_program(program),", 1212, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     assert_eq_metta_results!(run_program(program),", 1212, 0], _39816)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq_metta_results!(run_program(program),", 1212, 0], _39816)
   Call: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(run_program(program),", 1212, 0], _39816, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(run_program(program),", 1212, 0], [_42634|_42636], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(run_program(program),", _42634)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(run_program(program),", _42634)
   Call: (273) [system] var(";;     assert_eq_metta_results!(run_program(program),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(run_program(program),", _42634)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(run_program(program),", '$VAR'(_47280))
   Call: (273) [system] atom(";;     assert_eq_metta_results!(run_program(program),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(run_program(program),", _42634)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(run_program(program),", _42634)
   Call: (273) [system] ";;     assert_eq_metta_results!(run_program(program),"==true
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(run_program(program),", _42634)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(run_program(program),", _42634)
   Call: (273) [system] ";;     assert_eq_metta_results!(run_program(program),"==false
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(run_program(program),", _42634)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(run_program(program),", _42634)
   Call: (273) [system] ";;     assert_eq_metta_results!(run_program(program),"==[_56560, _56566]
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(run_program(program),", _42634)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(run_program(program),", _42634)
   Call: (273) [system] is_list(";;     assert_eq_metta_results!(run_program(program),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(run_program(program),", _42634)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(run_program(program),", _42634)
   Call: (273) [system] string(";;     assert_eq_metta_results!(run_program(program),")
   Exit: (273) [system] string(";;     assert_eq_metta_results!(run_program(program),")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(run_program(program),", _42634)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(run_program(program),", _42634)
   Call: (273) [system] compound(";;     assert_eq_metta_results!(run_program(program),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(run_program(program),", _42634)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(run_program(program),", _42634)
^  Call: (273) [user] symbol(";;     assert_eq_metta_results!(run_program(program),")
^  Unify: (273) [user] symbol(";;     assert_eq_metta_results!(run_program(program),")
   Call: (274) [system] atom(";;     assert_eq_metta_results!(run_program(program),")
   Fail: (274) [system] atom(";;     assert_eq_metta_results!(run_program(program),")
^  Fail: (273) [user] symbol(";;     assert_eq_metta_results!(run_program(program),")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(run_program(program),", _42634)
   Call: (273) [system] ";;     assert_eq_metta_results!(run_program(program),"=_42634
   Exit: (273) [system] ";;     assert_eq_metta_results!(run_program(program),"=";;     assert_eq_metta_results!(run_program(program),"
^  Exit: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(run_program(program),", ";;     assert_eq_metta_results!(run_program(program),")
   Call: (272) [apply] apply:maplist_([1212, 0], _42636, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1212, 0], [_80632|_80634], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1212, _80632)
^  Unify: (273) [user] mfix_vars1(1212, _80632)
   Call: (274) [system] var(1212)
^  Redo: (273) [user] mfix_vars1(1212, _80632)
^  Unify: (273) [user] mfix_vars1(1212, '$VAR'(_85278))
   Call: (274) [system] atom(1212)
^  Redo: (273) [user] mfix_vars1(1212, _80632)
^  Unify: (273) [user] mfix_vars1(1212, _80632)
   Call: (274) [system] 1212==true
^  Redo: (273) [user] mfix_vars1(1212, _80632)
^  Unify: (273) [user] mfix_vars1(1212, _80632)
   Call: (274) [system] 1212==false
^  Redo: (273) [user] mfix_vars1(1212, _80632)
^  Unify: (273) [user] mfix_vars1(1212, _80632)
   Call: (274) [system] 1212==[_94558, _94564]
^  Redo: (273) [user] mfix_vars1(1212, _80632)
^  Unify: (273) [user] mfix_vars1(1212, _80632)
   Call: (274) [system] is_list(1212)
^  Redo: (273) [user] mfix_vars1(1212, _80632)
^  Unify: (273) [user] mfix_vars1(1212, _80632)
   Call: (274) [system] string(1212)
^  Redo: (273) [user] mfix_vars1(1212, _80632)
^  Unify: (273) [user] mfix_vars1(1212, _80632)
   Call: (274) [system] compound(1212)
^  Redo: (273) [user] mfix_vars1(1212, _80632)
^  Unify: (273) [user] mfix_vars1(1212, _80632)
^  Call: (274) [user] symbol(1212)
^  Unify: (274) [user] symbol(1212)
   Call: (275) [system] atom(1212)
   Fail: (275) [system] atom(1212)
^  Fail: (274) [user] symbol(1212)
^  Redo: (273) [user] mfix_vars1(1212, _80632)
   Call: (274) [system] 1212=_80632
   Exit: (274) [system] 1212=1212
^  Exit: (273) [user] mfix_vars1(1212, 1212)
   Call: (273) [apply] apply:maplist_([0], _80634, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_114958|_114960], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _114958)
^  Unify: (274) [user] mfix_vars1(0, _114958)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _114958)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_119604))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _114958)
^  Unify: (274) [user] mfix_vars1(0, _114958)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _114958)
^  Unify: (274) [user] mfix_vars1(0, _114958)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _114958)
^  Unify: (274) [user] mfix_vars1(0, _114958)
   Call: (275) [system] 0==[_128884, _128890]
^  Redo: (274) [user] mfix_vars1(0, _114958)
^  Unify: (274) [user] mfix_vars1(0, _114958)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _114958)
^  Unify: (274) [user] mfix_vars1(0, _114958)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _114958)
^  Unify: (274) [user] mfix_vars1(0, _114958)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _114958)
^  Unify: (274) [user] mfix_vars1(0, _114958)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _114958)
   Call: (275) [system] 0=_114958
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _114960, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1212, 0], [1212, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(run_program(program),", 1212, 0], [";;     assert_eq_metta_results!(run_program(program),", 1212, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq_metta_results!(run_program(program),", 1212, 0], [";;     assert_eq_metta_results!(run_program(program),", 1212, 0])
   Call: (270) [system] compound_name_arguments(_9132, '$COMMENT', [";;     assert_eq_metta_results!(run_program(program),", 1212, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT', [";;     assert_eq_metta_results!(run_program(program),", 1212, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _5974)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _165132))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _165132))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _165132))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _165132))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _165132)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _165132)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _170718))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _170718))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _170718)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _170718)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _170718)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _165132)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _5954))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _5954))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _5954))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _5954))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _5954)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _5954)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _193038))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _193038))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _193038)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _193038)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _193038)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _5954)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0)))
   Call: (261) [system] '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _221816, [], _221818)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _221816, [], _221818)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _221816, [], _221818)
   Call: (258) [system] atom('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _221816, [], _221818)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _221816, [], _221818)
   Call: (258) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), _231132, _231134)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT', [";;     assert_eq_metta_results!(run_program(program),", 1212, 0])
^  Call: (258) [user] subst_vars([";;     assert_eq_metta_results!(run_program(program),", 1212, 0], _233018, [], _221818)
^  Unify: (258) [user] subst_vars([";;     assert_eq_metta_results!(run_program(program),", 1212, 0], [";;     assert_eq_metta_results!(run_program(program),", 1212, 0], [], [])
   Call: (259) [system] var([";;     assert_eq_metta_results!(run_program(program),", 1212, 0])
^  Redo: (258) [user] subst_vars([";;     assert_eq_metta_results!(run_program(program),", 1212, 0], _233018, [], _221818)
^  Unify: (258) [user] subst_vars([";;     assert_eq_metta_results!(run_program(program),", 1212, 0], [_236754|_236756], [], _221818)
^  Call: (259) [user] subst_vars(";;     assert_eq_metta_results!(run_program(program),", _236754, [], _237694)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(run_program(program),", ";;     assert_eq_metta_results!(run_program(program),", [], [])
   Call: (260) [system] var(";;     assert_eq_metta_results!(run_program(program),")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(run_program(program),", _236754, [], _237694)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(run_program(program),", _236754, [], _237694)
   Call: (260) [system] atom(";;     assert_eq_metta_results!(run_program(program),")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(run_program(program),", _236754, [], _237694)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(run_program(program),", _236754, [], _237694)
   Call: (260) [system] compound(";;     assert_eq_metta_results!(run_program(program),")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(run_program(program),", _236754, [], _237694)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(run_program(program),", ";;     assert_eq_metta_results!(run_program(program),", [], [])
^  Exit: (259) [user] subst_vars(";;     assert_eq_metta_results!(run_program(program),", ";;     assert_eq_metta_results!(run_program(program),", [], [])
^  Call: (259) [user] subst_vars([1212, 0], _236756, [], _221818)
^  Unify: (259) [user] subst_vars([1212, 0], [1212, 0], [], [])
   Call: (260) [system] var([1212, 0])
^  Redo: (259) [user] subst_vars([1212, 0], _236756, [], _221818)
^  Unify: (259) [user] subst_vars([1212, 0], [_252626|_252628], [], _221818)
^  Call: (260) [user] subst_vars(1212, _252626, [], _253566)
^  Unify: (260) [user] subst_vars(1212, 1212, [], [])
   Call: (261) [system] var(1212)
^  Redo: (260) [user] subst_vars(1212, _252626, [], _253566)
^  Unify: (260) [user] subst_vars(1212, _252626, [], _253566)
   Call: (261) [system] atom(1212)
^  Redo: (260) [user] subst_vars(1212, _252626, [], _253566)
^  Unify: (260) [user] subst_vars(1212, _252626, [], _253566)
   Call: (261) [system] compound(1212)
^  Redo: (260) [user] subst_vars(1212, _252626, [], _253566)
^  Unify: (260) [user] subst_vars(1212, 1212, [], [])
^  Exit: (260) [user] subst_vars(1212, 1212, [], [])
^  Call: (260) [user] subst_vars([0], _252628, [], _221818)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _252628, [], _221818)
^  Unify: (260) [user] subst_vars([0], [_268498|_268500], [], _221818)
^  Call: (261) [user] subst_vars(0, _268498, [], _269438)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _268498, [], _269438)
^  Unify: (261) [user] subst_vars(0, _268498, [], _269438)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _268498, [], _269438)
^  Unify: (261) [user] subst_vars(0, _268498, [], _269438)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _268498, [], _269438)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _268500, [], _221818)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _268500, [], _221818)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1212, 0], [1212, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     assert_eq_metta_results!(run_program(program),", 1212, 0], [";;     assert_eq_metta_results!(run_program(program),", 1212, 0], [], [])
   Call: (258) [system] compound_name_arguments(_221816, '$COMMENT', [";;     assert_eq_metta_results!(run_program(program),", 1212, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT', [";;     assert_eq_metta_results!(run_program(program),", 1212, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), [], [])
   Call: (257) [system] _291856=metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(run_program(program),", 1212, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1213, 0, 44150, '$COMMENT'(";;         Ok(vec![", 1213, 0), '$stream_position'(44150, 1213, 0, 44150)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![", 1213, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![", 1213, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![", 1213, 0), _344576))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![", 1213, 0), _344576))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![", 1213, 0), _344576)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         Ok(vec![", 1213, 0), _344576)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         Ok(vec![", 1213, 0), _344576)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         Ok(vec![", 1213, 0), _344576)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![", 1213, 0), _350188))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![", 1213, 0), _350188))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![", 1213, 0), _350188))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![", 1213, 0), _350188))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![", 1213, 0), _350188)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![", 1213, 0), _350188)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         Ok(vec![", 1213, 0), _355774))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         Ok(vec![", 1213, 0), _355774))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         Ok(vec![", 1213, 0), _355774)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         Ok(vec![", 1213, 0), _355774)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![", 1213, 0), _355774)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![", 1213, 0), _355774)
   Call: (270) [system] var('$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![", 1213, 0), _355774)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![", 1213, 0), '$VAR'(_363234))
   Call: (270) [system] atom('$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![", 1213, 0), _355774)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![", 1213, 0), _355774)
   Call: (270) [system] '$COMMENT'(";;         Ok(vec![", 1213, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![", 1213, 0), _355774)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![", 1213, 0), _355774)
   Call: (270) [system] '$COMMENT'(";;         Ok(vec![", 1213, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![", 1213, 0), _355774)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![", 1213, 0), _355774)
   Call: (270) [system] '$COMMENT'(";;         Ok(vec![", 1213, 0)==[_372514, _372520]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![", 1213, 0), _355774)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![", 1213, 0), _355774)
   Call: (270) [system] is_list('$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![", 1213, 0), _355774)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![", 1213, 0), _355774)
   Call: (270) [system] string('$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![", 1213, 0), _355774)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![", 1213, 0), _355774)
   Call: (270) [system] compound('$COMMENT'(";;         Ok(vec![", 1213, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         Ok(vec![", 1213, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![", 1213, 0), _382716, _382718)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT', [";;         Ok(vec![", 1213, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         Ok(vec![", 1213, 0], _386458)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         Ok(vec![", 1213, 0], _386458)
   Call: (271) [apply] apply:maplist_([";;         Ok(vec![", 1213, 0], _386458, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         Ok(vec![", 1213, 0], [_389276|_389278], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         Ok(vec![", _389276)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![", _389276)
   Call: (273) [system] var(";;         Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![", _389276)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![", '$VAR'(_393922))
   Call: (273) [system] atom(";;         Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![", _389276)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![", _389276)
   Call: (273) [system] ";;         Ok(vec!["==true
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![", _389276)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![", _389276)
   Call: (273) [system] ";;         Ok(vec!["==false
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![", _389276)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![", _389276)
   Call: (273) [system] ";;         Ok(vec!["==[_403202, _403208]
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![", _389276)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![", _389276)
   Call: (273) [system] is_list(";;         Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![", _389276)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![", _389276)
   Call: (273) [system] string(";;         Ok(vec![")
   Exit: (273) [system] string(";;         Ok(vec![")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![", _389276)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![", _389276)
   Call: (273) [system] compound(";;         Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![", _389276)
^  Unify: (272) [user] mfix_vars1(";;         Ok(vec![", _389276)
^  Call: (273) [user] symbol(";;         Ok(vec![")
^  Unify: (273) [user] symbol(";;         Ok(vec![")
   Call: (274) [system] atom(";;         Ok(vec![")
   Fail: (274) [system] atom(";;         Ok(vec![")
^  Fail: (273) [user] symbol(";;         Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;         Ok(vec![", _389276)
   Call: (273) [system] ";;         Ok(vec!["=_389276
   Exit: (273) [system] ";;         Ok(vec!["=";;         Ok(vec!["
^  Exit: (272) [user] mfix_vars1(";;         Ok(vec![", ";;         Ok(vec![")
   Call: (272) [apply] apply:maplist_([1213, 0], _389278, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1213, 0], [_427274|_427276], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1213, _427274)
^  Unify: (273) [user] mfix_vars1(1213, _427274)
   Call: (274) [system] var(1213)
^  Redo: (273) [user] mfix_vars1(1213, _427274)
^  Unify: (273) [user] mfix_vars1(1213, '$VAR'(_431920))
   Call: (274) [system] atom(1213)
^  Redo: (273) [user] mfix_vars1(1213, _427274)
^  Unify: (273) [user] mfix_vars1(1213, _427274)
   Call: (274) [system] 1213==true
^  Redo: (273) [user] mfix_vars1(1213, _427274)
^  Unify: (273) [user] mfix_vars1(1213, _427274)
   Call: (274) [system] 1213==false
^  Redo: (273) [user] mfix_vars1(1213, _427274)
^  Unify: (273) [user] mfix_vars1(1213, _427274)
   Call: (274) [system] 1213==[_441200, _441206]
^  Redo: (273) [user] mfix_vars1(1213, _427274)
^  Unify: (273) [user] mfix_vars1(1213, _427274)
   Call: (274) [system] is_list(1213)
^  Redo: (273) [user] mfix_vars1(1213, _427274)
^  Unify: (273) [user] mfix_vars1(1213, _427274)
   Call: (274) [system] string(1213)
^  Redo: (273) [user] mfix_vars1(1213, _427274)
^  Unify: (273) [user] mfix_vars1(1213, _427274)
   Call: (274) [system] compound(1213)
^  Redo: (273) [user] mfix_vars1(1213, _427274)
^  Unify: (273) [user] mfix_vars1(1213, _427274)
^  Call: (274) [user] symbol(1213)
^  Unify: (274) [user] symbol(1213)
   Call: (275) [system] atom(1213)
   Fail: (275) [system] atom(1213)
^  Fail: (274) [user] symbol(1213)
^  Redo: (273) [user] mfix_vars1(1213, _427274)
   Call: (274) [system] 1213=_427274
   Exit: (274) [system] 1213=1213
^  Exit: (273) [user] mfix_vars1(1213, 1213)
   Call: (273) [apply] apply:maplist_([0], _427276, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_461600|_461602], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _461600)
^  Unify: (274) [user] mfix_vars1(0, _461600)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _461600)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_466246))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _461600)
^  Unify: (274) [user] mfix_vars1(0, _461600)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _461600)
^  Unify: (274) [user] mfix_vars1(0, _461600)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _461600)
^  Unify: (274) [user] mfix_vars1(0, _461600)
   Call: (275) [system] 0==[_475526, _475532]
^  Redo: (274) [user] mfix_vars1(0, _461600)
^  Unify: (274) [user] mfix_vars1(0, _461600)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _461600)
^  Unify: (274) [user] mfix_vars1(0, _461600)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _461600)
^  Unify: (274) [user] mfix_vars1(0, _461600)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _461600)
^  Unify: (274) [user] mfix_vars1(0, _461600)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _461600)
   Call: (275) [system] 0=_461600
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _461602, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1213, 0], [1213, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         Ok(vec![", 1213, 0], [";;         Ok(vec![", 1213, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         Ok(vec![", 1213, 0], [";;         Ok(vec![", 1213, 0])
   Call: (270) [system] compound_name_arguments(_355774, '$COMMENT', [";;         Ok(vec![", 1213, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT', [";;         Ok(vec![", 1213, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0)))
   Call: (267) [system] '$COMMENT'(";;         Ok(vec![", 1213, 0)\=@='$COMMENT'(";;         Ok(vec![", 1213, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![", 1213, 0), _350188)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         Ok(vec![", 1213, 0), _511774))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![", 1213, 0), _511774))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![", 1213, 0), _511774))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![", 1213, 0), _511774))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![", 1213, 0), _511774)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![", 1213, 0), _511774)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         Ok(vec![", 1213, 0), _517360))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         Ok(vec![", 1213, 0), _517360))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         Ok(vec![", 1213, 0), _517360)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         Ok(vec![", 1213, 0), _517360)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         Ok(vec![", 1213, 0), _517360)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0)))
   Call: (267) [system] '$COMMENT'(";;         Ok(vec![", 1213, 0)\=@='$COMMENT'(";;         Ok(vec![", 1213, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![", 1213, 0), _5968)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         Ok(vec![", 1213, 0), _5946))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![", 1213, 0), _5946))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![", 1213, 0), _5946))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![", 1213, 0), _5946))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![", 1213, 0), _5946)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![", 1213, 0), _5946)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         Ok(vec![", 1213, 0), _21664))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         Ok(vec![", 1213, 0), _21664))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         Ok(vec![", 1213, 0), _21664)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         Ok(vec![", 1213, 0), _21664)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         Ok(vec![", 1213, 0), _21664)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0)))
   Call: (267) [system] '$COMMENT'(";;         Ok(vec![", 1213, 0)\=@='$COMMENT'(";;         Ok(vec![", 1213, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![", 1213, 0), _5946)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0)))
   Call: (261) [system] '$COMMENT'(";;         Ok(vec![", 1213, 0)\=@='$COMMENT'(";;         Ok(vec![", 1213, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![", 1213, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![", 1213, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![", 1213, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![", 1213, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![", 1213, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![", 1213, 0), _50442, [], _50444)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![", 1213, 0), _50442, [], _50444)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![", 1213, 0), _50442, [], _50444)
   Call: (258) [system] atom('$COMMENT'(";;         Ok(vec![", 1213, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![", 1213, 0), _50442, [], _50444)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![", 1213, 0), _50442, [], _50444)
   Call: (258) [system] compound('$COMMENT'(";;         Ok(vec![", 1213, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         Ok(vec![", 1213, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![", 1213, 0), _59758, _59760)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT', [";;         Ok(vec![", 1213, 0])
^  Call: (258) [user] subst_vars([";;         Ok(vec![", 1213, 0], _61644, [], _50444)
^  Unify: (258) [user] subst_vars([";;         Ok(vec![", 1213, 0], [";;         Ok(vec![", 1213, 0], [], [])
   Call: (259) [system] var([";;         Ok(vec![", 1213, 0])
^  Redo: (258) [user] subst_vars([";;         Ok(vec![", 1213, 0], _61644, [], _50444)
^  Unify: (258) [user] subst_vars([";;         Ok(vec![", 1213, 0], [_65380|_65382], [], _50444)
^  Call: (259) [user] subst_vars(";;         Ok(vec![", _65380, [], _66320)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![", ";;         Ok(vec![", [], [])
   Call: (260) [system] var(";;         Ok(vec![")
^  Redo: (259) [user] subst_vars(";;         Ok(vec![", _65380, [], _66320)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![", _65380, [], _66320)
   Call: (260) [system] atom(";;         Ok(vec![")
^  Redo: (259) [user] subst_vars(";;         Ok(vec![", _65380, [], _66320)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![", _65380, [], _66320)
   Call: (260) [system] compound(";;         Ok(vec![")
^  Redo: (259) [user] subst_vars(";;         Ok(vec![", _65380, [], _66320)
^  Unify: (259) [user] subst_vars(";;         Ok(vec![", ";;         Ok(vec![", [], [])
^  Exit: (259) [user] subst_vars(";;         Ok(vec![", ";;         Ok(vec![", [], [])
^  Call: (259) [user] subst_vars([1213, 0], _65382, [], _50444)
^  Unify: (259) [user] subst_vars([1213, 0], [1213, 0], [], [])
   Call: (260) [system] var([1213, 0])
^  Redo: (259) [user] subst_vars([1213, 0], _65382, [], _50444)
^  Unify: (259) [user] subst_vars([1213, 0], [_81252|_81254], [], _50444)
^  Call: (260) [user] subst_vars(1213, _81252, [], _82192)
^  Unify: (260) [user] subst_vars(1213, 1213, [], [])
   Call: (261) [system] var(1213)
^  Redo: (260) [user] subst_vars(1213, _81252, [], _82192)
^  Unify: (260) [user] subst_vars(1213, _81252, [], _82192)
   Call: (261) [system] atom(1213)
^  Redo: (260) [user] subst_vars(1213, _81252, [], _82192)
^  Unify: (260) [user] subst_vars(1213, _81252, [], _82192)
   Call: (261) [system] compound(1213)
^  Redo: (260) [user] subst_vars(1213, _81252, [], _82192)
^  Unify: (260) [user] subst_vars(1213, 1213, [], [])
^  Exit: (260) [user] subst_vars(1213, 1213, [], [])
^  Call: (260) [user] subst_vars([0], _81254, [], _50444)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _81254, [], _50444)
^  Unify: (260) [user] subst_vars([0], [_97124|_97126], [], _50444)
^  Call: (261) [user] subst_vars(0, _97124, [], _98064)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _97124, [], _98064)
^  Unify: (261) [user] subst_vars(0, _97124, [], _98064)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _97124, [], _98064)
^  Unify: (261) [user] subst_vars(0, _97124, [], _98064)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _97124, [], _98064)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _97126, [], _50444)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _97126, [], _50444)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1213, 0], [1213, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         Ok(vec![", 1213, 0], [";;         Ok(vec![", 1213, 0], [], [])
   Call: (258) [system] compound_name_arguments(_50442, '$COMMENT', [";;         Ok(vec![", 1213, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT', [";;         Ok(vec![", 1213, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         Ok(vec![", 1213, 0), '$COMMENT'(";;         Ok(vec![", 1213, 0), [], [])
   Call: (257) [system] _120482=metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![", 1213, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![", 1213, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![", 1213, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![", 1213, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![", 1213, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![", 1213, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![", 1213, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![", 1213, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         Ok(vec![", 1213, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1214, 0, 44170, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$stream_position'(44170, 1214, 0, 44170)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _173206))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _173206))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _173206)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _173206)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _173206)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _173206)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _178818))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _178818))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _178818))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _178818))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _178818)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _178818)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _184404))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _184404))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _184404)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _184404)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _184404)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _184404)
   Call: (270) [system] var('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _184404)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$VAR'(_191864))
   Call: (270) [system] atom('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _184404)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _184404)
   Call: (270) [system] '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _184404)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _184404)
   Call: (270) [system] '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _184404)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _184404)
   Call: (270) [system] '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0)==[_201144, _201150]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _184404)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _184404)
   Call: (270) [system] is_list('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _184404)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _184404)
   Call: (270) [system] string('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _184404)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _184404)
   Call: (270) [system] compound('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _211346, _211348)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT', [";;             vec![expr!(\"baz\")],", 1214, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             vec![expr!(\"baz\")],", 1214, 0], _215088)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             vec![expr!(\"baz\")],", 1214, 0], _215088)
   Call: (271) [apply] apply:maplist_([";;             vec![expr!(\"baz\")],", 1214, 0], _215088, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             vec![expr!(\"baz\")],", 1214, 0], [_217906|_217908], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             vec![expr!(\"baz\")],", _217906)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!(\"baz\")],", _217906)
   Call: (273) [system] var(";;             vec![expr!(\"baz\")],")
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!(\"baz\")],", _217906)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!(\"baz\")],", '$VAR'(_222552))
   Call: (273) [system] atom(";;             vec![expr!(\"baz\")],")
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!(\"baz\")],", _217906)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!(\"baz\")],", _217906)
   Call: (273) [system] ";;             vec![expr!(\"baz\")],"==true
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!(\"baz\")],", _217906)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!(\"baz\")],", _217906)
   Call: (273) [system] ";;             vec![expr!(\"baz\")],"==false
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!(\"baz\")],", _217906)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!(\"baz\")],", _217906)
   Call: (273) [system] ";;             vec![expr!(\"baz\")],"==[_231832, _231838]
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!(\"baz\")],", _217906)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!(\"baz\")],", _217906)
   Call: (273) [system] is_list(";;             vec![expr!(\"baz\")],")
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!(\"baz\")],", _217906)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!(\"baz\")],", _217906)
   Call: (273) [system] string(";;             vec![expr!(\"baz\")],")
   Exit: (273) [system] string(";;             vec![expr!(\"baz\")],")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!(\"baz\")],", _217906)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!(\"baz\")],", _217906)
   Call: (273) [system] compound(";;             vec![expr!(\"baz\")],")
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!(\"baz\")],", _217906)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!(\"baz\")],", _217906)
^  Call: (273) [user] symbol(";;             vec![expr!(\"baz\")],")
^  Unify: (273) [user] symbol(";;             vec![expr!(\"baz\")],")
   Call: (274) [system] atom(";;             vec![expr!(\"baz\")],")
   Fail: (274) [system] atom(";;             vec![expr!(\"baz\")],")
^  Fail: (273) [user] symbol(";;             vec![expr!(\"baz\")],")
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!(\"baz\")],", _217906)
   Call: (273) [system] ";;             vec![expr!(\"baz\")],"=_217906
   Exit: (273) [system] ";;             vec![expr!(\"baz\")],"=";;             vec![expr!(\"baz\")],"
^  Exit: (272) [user] mfix_vars1(";;             vec![expr!(\"baz\")],", ";;             vec![expr!(\"baz\")],")
   Call: (272) [apply] apply:maplist_([1214, 0], _217908, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1214, 0], [_255904|_255906], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1214, _255904)
^  Unify: (273) [user] mfix_vars1(1214, _255904)
   Call: (274) [system] var(1214)
^  Redo: (273) [user] mfix_vars1(1214, _255904)
^  Unify: (273) [user] mfix_vars1(1214, '$VAR'(_260550))
   Call: (274) [system] atom(1214)
^  Redo: (273) [user] mfix_vars1(1214, _255904)
^  Unify: (273) [user] mfix_vars1(1214, _255904)
   Call: (274) [system] 1214==true
^  Redo: (273) [user] mfix_vars1(1214, _255904)
^  Unify: (273) [user] mfix_vars1(1214, _255904)
   Call: (274) [system] 1214==false
^  Redo: (273) [user] mfix_vars1(1214, _255904)
^  Unify: (273) [user] mfix_vars1(1214, _255904)
   Call: (274) [system] 1214==[_269830, _269836]
^  Redo: (273) [user] mfix_vars1(1214, _255904)
^  Unify: (273) [user] mfix_vars1(1214, _255904)
   Call: (274) [system] is_list(1214)
^  Redo: (273) [user] mfix_vars1(1214, _255904)
^  Unify: (273) [user] mfix_vars1(1214, _255904)
   Call: (274) [system] string(1214)
^  Redo: (273) [user] mfix_vars1(1214, _255904)
^  Unify: (273) [user] mfix_vars1(1214, _255904)
   Call: (274) [system] compound(1214)
^  Redo: (273) [user] mfix_vars1(1214, _255904)
^  Unify: (273) [user] mfix_vars1(1214, _255904)
^  Call: (274) [user] symbol(1214)
^  Unify: (274) [user] symbol(1214)
   Call: (275) [system] atom(1214)
   Fail: (275) [system] atom(1214)
^  Fail: (274) [user] symbol(1214)
^  Redo: (273) [user] mfix_vars1(1214, _255904)
   Call: (274) [system] 1214=_255904
   Exit: (274) [system] 1214=1214
^  Exit: (273) [user] mfix_vars1(1214, 1214)
   Call: (273) [apply] apply:maplist_([0], _255906, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_290230|_290232], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _290230)
^  Unify: (274) [user] mfix_vars1(0, _290230)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _290230)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_294876))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _290230)
^  Unify: (274) [user] mfix_vars1(0, _290230)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _290230)
^  Unify: (274) [user] mfix_vars1(0, _290230)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _290230)
^  Unify: (274) [user] mfix_vars1(0, _290230)
   Call: (275) [system] 0==[_304156, _304162]
^  Redo: (274) [user] mfix_vars1(0, _290230)
^  Unify: (274) [user] mfix_vars1(0, _290230)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _290230)
^  Unify: (274) [user] mfix_vars1(0, _290230)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _290230)
^  Unify: (274) [user] mfix_vars1(0, _290230)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _290230)
^  Unify: (274) [user] mfix_vars1(0, _290230)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _290230)
   Call: (275) [system] 0=_290230
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _290232, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1214, 0], [1214, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             vec![expr!(\"baz\")],", 1214, 0], [";;             vec![expr!(\"baz\")],", 1214, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             vec![expr!(\"baz\")],", 1214, 0], [";;             vec![expr!(\"baz\")],", 1214, 0])
   Call: (270) [system] compound_name_arguments(_184404, '$COMMENT', [";;             vec![expr!(\"baz\")],", 1214, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT', [";;             vec![expr!(\"baz\")],", 1214, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0)))
   Call: (267) [system] '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0)\=@='$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _178818)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _340404))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _340404))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _340404))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _340404))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _340404)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _340404)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _345990))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _345990))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _345990)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _345990)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _345990)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0)))
   Call: (267) [system] '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0)\=@='$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _340404)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _173206))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _173206))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _173206))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _173206))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _173206)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _173206)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _368310))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _368310))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _368310)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _368310)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _368310)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0)))
   Call: (267) [system] '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0)\=@='$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _173206)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0)))
   Call: (261) [system] '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0)\=@='$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _397088, [], _397090)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _397088, [], _397090)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _397088, [], _397090)
   Call: (258) [system] atom('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _397088, [], _397090)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _397088, [], _397090)
   Call: (258) [system] compound('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), _406404, _406406)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT', [";;             vec![expr!(\"baz\")],", 1214, 0])
^  Call: (258) [user] subst_vars([";;             vec![expr!(\"baz\")],", 1214, 0], _408290, [], _397090)
^  Unify: (258) [user] subst_vars([";;             vec![expr!(\"baz\")],", 1214, 0], [";;             vec![expr!(\"baz\")],", 1214, 0], [], [])
   Call: (259) [system] var([";;             vec![expr!(\"baz\")],", 1214, 0])
^  Redo: (258) [user] subst_vars([";;             vec![expr!(\"baz\")],", 1214, 0], _408290, [], _397090)
^  Unify: (258) [user] subst_vars([";;             vec![expr!(\"baz\")],", 1214, 0], [_412026|_412028], [], _397090)
^  Call: (259) [user] subst_vars(";;             vec![expr!(\"baz\")],", _412026, [], _412966)
^  Unify: (259) [user] subst_vars(";;             vec![expr!(\"baz\")],", ";;             vec![expr!(\"baz\")],", [], [])
   Call: (260) [system] var(";;             vec![expr!(\"baz\")],")
^  Redo: (259) [user] subst_vars(";;             vec![expr!(\"baz\")],", _412026, [], _412966)
^  Unify: (259) [user] subst_vars(";;             vec![expr!(\"baz\")],", _412026, [], _412966)
   Call: (260) [system] atom(";;             vec![expr!(\"baz\")],")
^  Redo: (259) [user] subst_vars(";;             vec![expr!(\"baz\")],", _412026, [], _412966)
^  Unify: (259) [user] subst_vars(";;             vec![expr!(\"baz\")],", _412026, [], _412966)
   Call: (260) [system] compound(";;             vec![expr!(\"baz\")],")
^  Redo: (259) [user] subst_vars(";;             vec![expr!(\"baz\")],", _412026, [], _412966)
^  Unify: (259) [user] subst_vars(";;             vec![expr!(\"baz\")],", ";;             vec![expr!(\"baz\")],", [], [])
^  Exit: (259) [user] subst_vars(";;             vec![expr!(\"baz\")],", ";;             vec![expr!(\"baz\")],", [], [])
^  Call: (259) [user] subst_vars([1214, 0], _412028, [], _397090)
^  Unify: (259) [user] subst_vars([1214, 0], [1214, 0], [], [])
   Call: (260) [system] var([1214, 0])
^  Redo: (259) [user] subst_vars([1214, 0], _412028, [], _397090)
^  Unify: (259) [user] subst_vars([1214, 0], [_427898|_427900], [], _397090)
^  Call: (260) [user] subst_vars(1214, _427898, [], _428838)
^  Unify: (260) [user] subst_vars(1214, 1214, [], [])
   Call: (261) [system] var(1214)
^  Redo: (260) [user] subst_vars(1214, _427898, [], _428838)
^  Unify: (260) [user] subst_vars(1214, _427898, [], _428838)
   Call: (261) [system] atom(1214)
^  Redo: (260) [user] subst_vars(1214, _427898, [], _428838)
^  Unify: (260) [user] subst_vars(1214, _427898, [], _428838)
   Call: (261) [system] compound(1214)
^  Redo: (260) [user] subst_vars(1214, _427898, [], _428838)
^  Unify: (260) [user] subst_vars(1214, 1214, [], [])
^  Exit: (260) [user] subst_vars(1214, 1214, [], [])
^  Call: (260) [user] subst_vars([0], _427900, [], _397090)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _427900, [], _397090)
^  Unify: (260) [user] subst_vars([0], [_443770|_443772], [], _397090)
^  Call: (261) [user] subst_vars(0, _443770, [], _444710)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _443770, [], _444710)
^  Unify: (261) [user] subst_vars(0, _443770, [], _444710)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _443770, [], _444710)
^  Unify: (261) [user] subst_vars(0, _443770, [], _444710)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _443770, [], _444710)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _443772, [], _397090)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _443772, [], _397090)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1214, 0], [1214, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             vec![expr!(\"baz\")],", 1214, 0], [";;             vec![expr!(\"baz\")],", 1214, 0], [], [])
   Call: (258) [system] compound_name_arguments(_397088, '$COMMENT', [";;             vec![expr!(\"baz\")],", 1214, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT', [";;             vec![expr!(\"baz\")],", 1214, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), [], [])
   Call: (257) [system] _467128=metta_file_buffer(+, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             vec![expr!(\"baz\")],", 1214, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1215, 0, 44205, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$stream_position'(44205, 1215, 0, 44205)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _519852))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _519852))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _519852)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _519852)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _5950)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _5950)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _7498))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _7498))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _7498))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _7498))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _7498)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _7498)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _13084))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _13084))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _13084)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _13084)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _13084)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _13084)
   Call: (270) [system] var('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _13084)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$VAR'(_20544))
   Call: (270) [system] atom('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _13084)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _13084)
   Call: (270) [system] '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _13084)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _13084)
   Call: (270) [system] '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _13084)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _13084)
   Call: (270) [system] '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0)==[_29824, _29830]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _13084)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _13084)
   Call: (270) [system] is_list('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _13084)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _13084)
   Call: (270) [system] string('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _13084)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _13084)
   Call: (270) [system] compound('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _40026, _40028)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT', [";;             vec![UNIT_ATOM()],", 1215, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             vec![UNIT_ATOM()],", 1215, 0], _43768)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             vec![UNIT_ATOM()],", 1215, 0], _43768)
   Call: (271) [apply] apply:maplist_([";;             vec![UNIT_ATOM()],", 1215, 0], _43768, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             vec![UNIT_ATOM()],", 1215, 0], [_46586|_46588], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             vec![UNIT_ATOM()],", _46586)
^  Unify: (272) [user] mfix_vars1(";;             vec![UNIT_ATOM()],", _46586)
   Call: (273) [system] var(";;             vec![UNIT_ATOM()],")
^  Redo: (272) [user] mfix_vars1(";;             vec![UNIT_ATOM()],", _46586)
^  Unify: (272) [user] mfix_vars1(";;             vec![UNIT_ATOM()],", '$VAR'(_51232))
   Call: (273) [system] atom(";;             vec![UNIT_ATOM()],")
^  Redo: (272) [user] mfix_vars1(";;             vec![UNIT_ATOM()],", _46586)
^  Unify: (272) [user] mfix_vars1(";;             vec![UNIT_ATOM()],", _46586)
   Call: (273) [system] ";;             vec![UNIT_ATOM()],"==true
^  Redo: (272) [user] mfix_vars1(";;             vec![UNIT_ATOM()],", _46586)
^  Unify: (272) [user] mfix_vars1(";;             vec![UNIT_ATOM()],", _46586)
   Call: (273) [system] ";;             vec![UNIT_ATOM()],"==false
^  Redo: (272) [user] mfix_vars1(";;             vec![UNIT_ATOM()],", _46586)
^  Unify: (272) [user] mfix_vars1(";;             vec![UNIT_ATOM()],", _46586)
   Call: (273) [system] ";;             vec![UNIT_ATOM()],"==[_60512, _60518]
^  Redo: (272) [user] mfix_vars1(";;             vec![UNIT_ATOM()],", _46586)
^  Unify: (272) [user] mfix_vars1(";;             vec![UNIT_ATOM()],", _46586)
   Call: (273) [system] is_list(";;             vec![UNIT_ATOM()],")
^  Redo: (272) [user] mfix_vars1(";;             vec![UNIT_ATOM()],", _46586)
^  Unify: (272) [user] mfix_vars1(";;             vec![UNIT_ATOM()],", _46586)
   Call: (273) [system] string(";;             vec![UNIT_ATOM()],")
   Exit: (273) [system] string(";;             vec![UNIT_ATOM()],")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             vec![UNIT_ATOM()],", _46586)
^  Unify: (272) [user] mfix_vars1(";;             vec![UNIT_ATOM()],", _46586)
   Call: (273) [system] compound(";;             vec![UNIT_ATOM()],")
^  Redo: (272) [user] mfix_vars1(";;             vec![UNIT_ATOM()],", _46586)
^  Unify: (272) [user] mfix_vars1(";;             vec![UNIT_ATOM()],", _46586)
^  Call: (273) [user] symbol(";;             vec![UNIT_ATOM()],")
^  Unify: (273) [user] symbol(";;             vec![UNIT_ATOM()],")
   Call: (274) [system] atom(";;             vec![UNIT_ATOM()],")
   Fail: (274) [system] atom(";;             vec![UNIT_ATOM()],")
^  Fail: (273) [user] symbol(";;             vec![UNIT_ATOM()],")
^  Redo: (272) [user] mfix_vars1(";;             vec![UNIT_ATOM()],", _46586)
   Call: (273) [system] ";;             vec![UNIT_ATOM()],"=_46586
   Exit: (273) [system] ";;             vec![UNIT_ATOM()],"=";;             vec![UNIT_ATOM()],"
^  Exit: (272) [user] mfix_vars1(";;             vec![UNIT_ATOM()],", ";;             vec![UNIT_ATOM()],")
   Call: (272) [apply] apply:maplist_([1215, 0], _46588, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1215, 0], [_84584|_84586], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1215, _84584)
^  Unify: (273) [user] mfix_vars1(1215, _84584)
   Call: (274) [system] var(1215)
^  Redo: (273) [user] mfix_vars1(1215, _84584)
^  Unify: (273) [user] mfix_vars1(1215, '$VAR'(_89230))
   Call: (274) [system] atom(1215)
^  Redo: (273) [user] mfix_vars1(1215, _84584)
^  Unify: (273) [user] mfix_vars1(1215, _84584)
   Call: (274) [system] 1215==true
^  Redo: (273) [user] mfix_vars1(1215, _84584)
^  Unify: (273) [user] mfix_vars1(1215, _84584)
   Call: (274) [system] 1215==false
^  Redo: (273) [user] mfix_vars1(1215, _84584)
^  Unify: (273) [user] mfix_vars1(1215, _84584)
   Call: (274) [system] 1215==[_98510, _98516]
^  Redo: (273) [user] mfix_vars1(1215, _84584)
^  Unify: (273) [user] mfix_vars1(1215, _84584)
   Call: (274) [system] is_list(1215)
^  Redo: (273) [user] mfix_vars1(1215, _84584)
^  Unify: (273) [user] mfix_vars1(1215, _84584)
   Call: (274) [system] string(1215)
^  Redo: (273) [user] mfix_vars1(1215, _84584)
^  Unify: (273) [user] mfix_vars1(1215, _84584)
   Call: (274) [system] compound(1215)
^  Redo: (273) [user] mfix_vars1(1215, _84584)
^  Unify: (273) [user] mfix_vars1(1215, _84584)
^  Call: (274) [user] symbol(1215)
^  Unify: (274) [user] symbol(1215)
   Call: (275) [system] atom(1215)
   Fail: (275) [system] atom(1215)
^  Fail: (274) [user] symbol(1215)
^  Redo: (273) [user] mfix_vars1(1215, _84584)
   Call: (274) [system] 1215=_84584
   Exit: (274) [system] 1215=1215
^  Exit: (273) [user] mfix_vars1(1215, 1215)
   Call: (273) [apply] apply:maplist_([0], _84586, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_118910|_118912], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _118910)
^  Unify: (274) [user] mfix_vars1(0, _118910)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _118910)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_123556))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _118910)
^  Unify: (274) [user] mfix_vars1(0, _118910)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _118910)
^  Unify: (274) [user] mfix_vars1(0, _118910)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _118910)
^  Unify: (274) [user] mfix_vars1(0, _118910)
   Call: (275) [system] 0==[_132836, _132842]
^  Redo: (274) [user] mfix_vars1(0, _118910)
^  Unify: (274) [user] mfix_vars1(0, _118910)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _118910)
^  Unify: (274) [user] mfix_vars1(0, _118910)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _118910)
^  Unify: (274) [user] mfix_vars1(0, _118910)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _118910)
^  Unify: (274) [user] mfix_vars1(0, _118910)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _118910)
   Call: (275) [system] 0=_118910
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _118912, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1215, 0], [1215, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             vec![UNIT_ATOM()],", 1215, 0], [";;             vec![UNIT_ATOM()],", 1215, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             vec![UNIT_ATOM()],", 1215, 0], [";;             vec![UNIT_ATOM()],", 1215, 0])
   Call: (270) [system] compound_name_arguments(_13084, '$COMMENT', [";;             vec![UNIT_ATOM()],", 1215, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT', [";;             vec![UNIT_ATOM()],", 1215, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0)))
   Call: (267) [system] '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0)\=@='$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _7498)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _169084))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _169084))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _169084))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _169084))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _169084)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _169084)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _174670))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _174670))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _174670)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _174670)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _174670)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0)))
   Call: (267) [system] '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0)\=@='$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _169084)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _196990))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _196990))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _196990)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _196990)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _196990)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0)))
   Call: (267) [system] '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0)\=@='$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0)))
   Call: (261) [system] '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0)\=@='$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _225768, [], _225770)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _225768, [], _225770)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _225768, [], _225770)
   Call: (258) [system] atom('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _225768, [], _225770)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _225768, [], _225770)
   Call: (258) [system] compound('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), _235084, _235086)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT', [";;             vec![UNIT_ATOM()],", 1215, 0])
^  Call: (258) [user] subst_vars([";;             vec![UNIT_ATOM()],", 1215, 0], _236970, [], _225770)
^  Unify: (258) [user] subst_vars([";;             vec![UNIT_ATOM()],", 1215, 0], [";;             vec![UNIT_ATOM()],", 1215, 0], [], [])
   Call: (259) [system] var([";;             vec![UNIT_ATOM()],", 1215, 0])
^  Redo: (258) [user] subst_vars([";;             vec![UNIT_ATOM()],", 1215, 0], _236970, [], _225770)
^  Unify: (258) [user] subst_vars([";;             vec![UNIT_ATOM()],", 1215, 0], [_240706|_240708], [], _225770)
^  Call: (259) [user] subst_vars(";;             vec![UNIT_ATOM()],", _240706, [], _241646)
^  Unify: (259) [user] subst_vars(";;             vec![UNIT_ATOM()],", ";;             vec![UNIT_ATOM()],", [], [])
   Call: (260) [system] var(";;             vec![UNIT_ATOM()],")
^  Redo: (259) [user] subst_vars(";;             vec![UNIT_ATOM()],", _240706, [], _241646)
^  Unify: (259) [user] subst_vars(";;             vec![UNIT_ATOM()],", _240706, [], _241646)
   Call: (260) [system] atom(";;             vec![UNIT_ATOM()],")
^  Redo: (259) [user] subst_vars(";;             vec![UNIT_ATOM()],", _240706, [], _241646)
^  Unify: (259) [user] subst_vars(";;             vec![UNIT_ATOM()],", _240706, [], _241646)
   Call: (260) [system] compound(";;             vec![UNIT_ATOM()],")
^  Redo: (259) [user] subst_vars(";;             vec![UNIT_ATOM()],", _240706, [], _241646)
^  Unify: (259) [user] subst_vars(";;             vec![UNIT_ATOM()],", ";;             vec![UNIT_ATOM()],", [], [])
^  Exit: (259) [user] subst_vars(";;             vec![UNIT_ATOM()],", ";;             vec![UNIT_ATOM()],", [], [])
^  Call: (259) [user] subst_vars([1215, 0], _240708, [], _225770)
^  Unify: (259) [user] subst_vars([1215, 0], [1215, 0], [], [])
   Call: (260) [system] var([1215, 0])
^  Redo: (259) [user] subst_vars([1215, 0], _240708, [], _225770)
^  Unify: (259) [user] subst_vars([1215, 0], [_256578|_256580], [], _225770)
^  Call: (260) [user] subst_vars(1215, _256578, [], _257518)
^  Unify: (260) [user] subst_vars(1215, 1215, [], [])
   Call: (261) [system] var(1215)
^  Redo: (260) [user] subst_vars(1215, _256578, [], _257518)
^  Unify: (260) [user] subst_vars(1215, _256578, [], _257518)
   Call: (261) [system] atom(1215)
^  Redo: (260) [user] subst_vars(1215, _256578, [], _257518)
^  Unify: (260) [user] subst_vars(1215, _256578, [], _257518)
   Call: (261) [system] compound(1215)
^  Redo: (260) [user] subst_vars(1215, _256578, [], _257518)
^  Unify: (260) [user] subst_vars(1215, 1215, [], [])
^  Exit: (260) [user] subst_vars(1215, 1215, [], [])
^  Call: (260) [user] subst_vars([0], _256580, [], _225770)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _256580, [], _225770)
^  Unify: (260) [user] subst_vars([0], [_272450|_272452], [], _225770)
^  Call: (261) [user] subst_vars(0, _272450, [], _273390)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _272450, [], _273390)
^  Unify: (261) [user] subst_vars(0, _272450, [], _273390)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _272450, [], _273390)
^  Unify: (261) [user] subst_vars(0, _272450, [], _273390)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _272450, [], _273390)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _272452, [], _225770)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _272452, [], _225770)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1215, 0], [1215, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             vec![UNIT_ATOM()],", 1215, 0], [";;             vec![UNIT_ATOM()],", 1215, 0], [], [])
   Call: (258) [system] compound_name_arguments(_225768, '$COMMENT', [";;             vec![UNIT_ATOM()],", 1215, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT', [";;             vec![UNIT_ATOM()],", 1215, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), [], [])
   Call: (257) [system] _295808=metta_file_buffer(+, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             vec![UNIT_ATOM()],", 1215, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1216, 0, 44239, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$stream_position'(44239, 1216, 0, 44239)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _348532))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _348532))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _348532)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _348532)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _348532)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _348532)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _354144))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _354144))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _354144))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _354144))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _354144)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _354144)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _359730))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _359730))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _359730)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _359730)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _359730)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _359730)
   Call: (270) [system] var('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _359730)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$VAR'(_367190))
   Call: (270) [system] atom('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _359730)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _359730)
   Call: (270) [system] '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _359730)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _359730)
   Call: (270) [system] '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _359730)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _359730)
   Call: (270) [system] '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0)==[_376470, _376476]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _359730)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _359730)
   Call: (270) [system] is_list('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _359730)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _359730)
   Call: (270) [system] string('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _359730)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _359730)
   Call: (270) [system] compound('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _386672, _386674)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT', [";;             vec![expr!((\"foo\"))],", 1216, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             vec![expr!((\"foo\"))],", 1216, 0], _390414)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             vec![expr!((\"foo\"))],", 1216, 0], _390414)
   Call: (271) [apply] apply:maplist_([";;             vec![expr!((\"foo\"))],", 1216, 0], _390414, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             vec![expr!((\"foo\"))],", 1216, 0], [_393232|_393234], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             vec![expr!((\"foo\"))],", _393232)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!((\"foo\"))],", _393232)
   Call: (273) [system] var(";;             vec![expr!((\"foo\"))],")
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!((\"foo\"))],", _393232)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!((\"foo\"))],", '$VAR'(_397878))
   Call: (273) [system] atom(";;             vec![expr!((\"foo\"))],")
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!((\"foo\"))],", _393232)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!((\"foo\"))],", _393232)
   Call: (273) [system] ";;             vec![expr!((\"foo\"))],"==true
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!((\"foo\"))],", _393232)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!((\"foo\"))],", _393232)
   Call: (273) [system] ";;             vec![expr!((\"foo\"))],"==false
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!((\"foo\"))],", _393232)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!((\"foo\"))],", _393232)
   Call: (273) [system] ";;             vec![expr!((\"foo\"))],"==[_407158, _407164]
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!((\"foo\"))],", _393232)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!((\"foo\"))],", _393232)
   Call: (273) [system] is_list(";;             vec![expr!((\"foo\"))],")
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!((\"foo\"))],", _393232)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!((\"foo\"))],", _393232)
   Call: (273) [system] string(";;             vec![expr!((\"foo\"))],")
   Exit: (273) [system] string(";;             vec![expr!((\"foo\"))],")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!((\"foo\"))],", _393232)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!((\"foo\"))],", _393232)
   Call: (273) [system] compound(";;             vec![expr!((\"foo\"))],")
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!((\"foo\"))],", _393232)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!((\"foo\"))],", _393232)
^  Call: (273) [user] symbol(";;             vec![expr!((\"foo\"))],")
^  Unify: (273) [user] symbol(";;             vec![expr!((\"foo\"))],")
   Call: (274) [system] atom(";;             vec![expr!((\"foo\"))],")
   Fail: (274) [system] atom(";;             vec![expr!((\"foo\"))],")
^  Fail: (273) [user] symbol(";;             vec![expr!((\"foo\"))],")
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!((\"foo\"))],", _393232)
   Call: (273) [system] ";;             vec![expr!((\"foo\"))],"=_393232
   Exit: (273) [system] ";;             vec![expr!((\"foo\"))],"=";;             vec![expr!((\"foo\"))],"
^  Exit: (272) [user] mfix_vars1(";;             vec![expr!((\"foo\"))],", ";;             vec![expr!((\"foo\"))],")
   Call: (272) [apply] apply:maplist_([1216, 0], _393234, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1216, 0], [_431230|_431232], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1216, _431230)
^  Unify: (273) [user] mfix_vars1(1216, _431230)
   Call: (274) [system] var(1216)
^  Redo: (273) [user] mfix_vars1(1216, _431230)
^  Unify: (273) [user] mfix_vars1(1216, '$VAR'(_435876))
   Call: (274) [system] atom(1216)
^  Redo: (273) [user] mfix_vars1(1216, _431230)
^  Unify: (273) [user] mfix_vars1(1216, _431230)
   Call: (274) [system] 1216==true
^  Redo: (273) [user] mfix_vars1(1216, _431230)
^  Unify: (273) [user] mfix_vars1(1216, _431230)
   Call: (274) [system] 1216==false
^  Redo: (273) [user] mfix_vars1(1216, _431230)
^  Unify: (273) [user] mfix_vars1(1216, _431230)
   Call: (274) [system] 1216==[_445156, _445162]
^  Redo: (273) [user] mfix_vars1(1216, _431230)
^  Unify: (273) [user] mfix_vars1(1216, _431230)
   Call: (274) [system] is_list(1216)
^  Redo: (273) [user] mfix_vars1(1216, _431230)
^  Unify: (273) [user] mfix_vars1(1216, _431230)
   Call: (274) [system] string(1216)
^  Redo: (273) [user] mfix_vars1(1216, _431230)
^  Unify: (273) [user] mfix_vars1(1216, _431230)
   Call: (274) [system] compound(1216)
^  Redo: (273) [user] mfix_vars1(1216, _431230)
^  Unify: (273) [user] mfix_vars1(1216, _431230)
^  Call: (274) [user] symbol(1216)
^  Unify: (274) [user] symbol(1216)
   Call: (275) [system] atom(1216)
   Fail: (275) [system] atom(1216)
^  Fail: (274) [user] symbol(1216)
^  Redo: (273) [user] mfix_vars1(1216, _431230)
   Call: (274) [system] 1216=_431230
   Exit: (274) [system] 1216=1216
^  Exit: (273) [user] mfix_vars1(1216, 1216)
   Call: (273) [apply] apply:maplist_([0], _431232, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_465556|_465558], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _465556)
^  Unify: (274) [user] mfix_vars1(0, _465556)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _465556)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_470202))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _465556)
^  Unify: (274) [user] mfix_vars1(0, _465556)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _465556)
^  Unify: (274) [user] mfix_vars1(0, _465556)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _465556)
^  Unify: (274) [user] mfix_vars1(0, _465556)
   Call: (275) [system] 0==[_479482, _479488]
^  Redo: (274) [user] mfix_vars1(0, _465556)
^  Unify: (274) [user] mfix_vars1(0, _465556)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _465556)
^  Unify: (274) [user] mfix_vars1(0, _465556)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _465556)
^  Unify: (274) [user] mfix_vars1(0, _465556)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _465556)
^  Unify: (274) [user] mfix_vars1(0, _465556)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _465556)
   Call: (275) [system] 0=_465556
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _465558, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1216, 0], [1216, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             vec![expr!((\"foo\"))],", 1216, 0], [";;             vec![expr!((\"foo\"))],", 1216, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             vec![expr!((\"foo\"))],", 1216, 0], [";;             vec![expr!((\"foo\"))],", 1216, 0])
   Call: (270) [system] compound_name_arguments(_359730, '$COMMENT', [";;             vec![expr!((\"foo\"))],", 1216, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT', [";;             vec![expr!((\"foo\"))],", 1216, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0)))
   Call: (267) [system] '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0)\=@='$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _354144)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _515730))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _515730))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _515730))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _515730))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _515730)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _515730)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _521316))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _521316))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _521316)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _5986)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _5986)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0)))
   Call: (267) [system] '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0)\=@='$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _5972)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _25472))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _25472))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _25472)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _25472)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _25472)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0)))
   Call: (267) [system] '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0)\=@='$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0)))
   Call: (261) [system] '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0)\=@='$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _54250, [], _54252)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _54250, [], _54252)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _54250, [], _54252)
   Call: (258) [system] atom('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _54250, [], _54252)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _54250, [], _54252)
   Call: (258) [system] compound('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), _63566, _63568)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT', [";;             vec![expr!((\"foo\"))],", 1216, 0])
^  Call: (258) [user] subst_vars([";;             vec![expr!((\"foo\"))],", 1216, 0], _65452, [], _54252)
^  Unify: (258) [user] subst_vars([";;             vec![expr!((\"foo\"))],", 1216, 0], [";;             vec![expr!((\"foo\"))],", 1216, 0], [], [])
   Call: (259) [system] var([";;             vec![expr!((\"foo\"))],", 1216, 0])
^  Redo: (258) [user] subst_vars([";;             vec![expr!((\"foo\"))],", 1216, 0], _65452, [], _54252)
^  Unify: (258) [user] subst_vars([";;             vec![expr!((\"foo\"))],", 1216, 0], [_69188|_69190], [], _54252)
^  Call: (259) [user] subst_vars(";;             vec![expr!((\"foo\"))],", _69188, [], _70128)
^  Unify: (259) [user] subst_vars(";;             vec![expr!((\"foo\"))],", ";;             vec![expr!((\"foo\"))],", [], [])
   Call: (260) [system] var(";;             vec![expr!((\"foo\"))],")
^  Redo: (259) [user] subst_vars(";;             vec![expr!((\"foo\"))],", _69188, [], _70128)
^  Unify: (259) [user] subst_vars(";;             vec![expr!((\"foo\"))],", _69188, [], _70128)
   Call: (260) [system] atom(";;             vec![expr!((\"foo\"))],")
^  Redo: (259) [user] subst_vars(";;             vec![expr!((\"foo\"))],", _69188, [], _70128)
^  Unify: (259) [user] subst_vars(";;             vec![expr!((\"foo\"))],", _69188, [], _70128)
   Call: (260) [system] compound(";;             vec![expr!((\"foo\"))],")
^  Redo: (259) [user] subst_vars(";;             vec![expr!((\"foo\"))],", _69188, [], _70128)
^  Unify: (259) [user] subst_vars(";;             vec![expr!((\"foo\"))],", ";;             vec![expr!((\"foo\"))],", [], [])
^  Exit: (259) [user] subst_vars(";;             vec![expr!((\"foo\"))],", ";;             vec![expr!((\"foo\"))],", [], [])
^  Call: (259) [user] subst_vars([1216, 0], _69190, [], _54252)
^  Unify: (259) [user] subst_vars([1216, 0], [1216, 0], [], [])
   Call: (260) [system] var([1216, 0])
^  Redo: (259) [user] subst_vars([1216, 0], _69190, [], _54252)
^  Unify: (259) [user] subst_vars([1216, 0], [_85060|_85062], [], _54252)
^  Call: (260) [user] subst_vars(1216, _85060, [], _86000)
^  Unify: (260) [user] subst_vars(1216, 1216, [], [])
   Call: (261) [system] var(1216)
^  Redo: (260) [user] subst_vars(1216, _85060, [], _86000)
^  Unify: (260) [user] subst_vars(1216, _85060, [], _86000)
   Call: (261) [system] atom(1216)
^  Redo: (260) [user] subst_vars(1216, _85060, [], _86000)
^  Unify: (260) [user] subst_vars(1216, _85060, [], _86000)
   Call: (261) [system] compound(1216)
^  Redo: (260) [user] subst_vars(1216, _85060, [], _86000)
^  Unify: (260) [user] subst_vars(1216, 1216, [], [])
^  Exit: (260) [user] subst_vars(1216, 1216, [], [])
^  Call: (260) [user] subst_vars([0], _85062, [], _54252)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _85062, [], _54252)
^  Unify: (260) [user] subst_vars([0], [_100932|_100934], [], _54252)
^  Call: (261) [user] subst_vars(0, _100932, [], _101872)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _100932, [], _101872)
^  Unify: (261) [user] subst_vars(0, _100932, [], _101872)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _100932, [], _101872)
^  Unify: (261) [user] subst_vars(0, _100932, [], _101872)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _100932, [], _101872)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _100934, [], _54252)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _100934, [], _54252)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1216, 0], [1216, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             vec![expr!((\"foo\"))],", 1216, 0], [";;             vec![expr!((\"foo\"))],", 1216, 0], [], [])
   Call: (258) [system] compound_name_arguments(_54250, '$COMMENT', [";;             vec![expr!((\"foo\"))],", 1216, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT', [";;             vec![expr!((\"foo\"))],", 1216, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), [], [])
   Call: (257) [system] _124290=metta_file_buffer(+, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             vec![expr!((\"foo\"))],", 1216, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1217, 0, 44276, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$stream_position'(44276, 1217, 0, 44276)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _177014))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _177014))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _177014)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _177014)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _177014)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _177014)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _182626))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _182626))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _182626))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _182626))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _182626)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _182626)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _188212))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _188212))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _188212)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _188212)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _188212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _188212)
   Call: (270) [system] var('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _188212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$VAR'(_195672))
   Call: (270) [system] atom('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _188212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _188212)
   Call: (270) [system] '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _188212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _188212)
   Call: (270) [system] '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _188212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _188212)
   Call: (270) [system] '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0)==[_204952, _204958]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _188212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _188212)
   Call: (270) [system] is_list('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _188212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _188212)
   Call: (270) [system] string('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _188212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _188212)
   Call: (270) [system] compound('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _215154, _215156)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT', [";;             vec![expr!((\"bar\"))],", 1217, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             vec![expr!((\"bar\"))],", 1217, 0], _218896)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             vec![expr!((\"bar\"))],", 1217, 0], _218896)
   Call: (271) [apply] apply:maplist_([";;             vec![expr!((\"bar\"))],", 1217, 0], _218896, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             vec![expr!((\"bar\"))],", 1217, 0], [_221714|_221716], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             vec![expr!((\"bar\"))],", _221714)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!((\"bar\"))],", _221714)
   Call: (273) [system] var(";;             vec![expr!((\"bar\"))],")
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!((\"bar\"))],", _221714)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!((\"bar\"))],", '$VAR'(_226360))
   Call: (273) [system] atom(";;             vec![expr!((\"bar\"))],")
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!((\"bar\"))],", _221714)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!((\"bar\"))],", _221714)
   Call: (273) [system] ";;             vec![expr!((\"bar\"))],"==true
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!((\"bar\"))],", _221714)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!((\"bar\"))],", _221714)
   Call: (273) [system] ";;             vec![expr!((\"bar\"))],"==false
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!((\"bar\"))],", _221714)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!((\"bar\"))],", _221714)
   Call: (273) [system] ";;             vec![expr!((\"bar\"))],"==[_235640, _235646]
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!((\"bar\"))],", _221714)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!((\"bar\"))],", _221714)
   Call: (273) [system] is_list(";;             vec![expr!((\"bar\"))],")
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!((\"bar\"))],", _221714)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!((\"bar\"))],", _221714)
   Call: (273) [system] string(";;             vec![expr!((\"bar\"))],")
   Exit: (273) [system] string(";;             vec![expr!((\"bar\"))],")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!((\"bar\"))],", _221714)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!((\"bar\"))],", _221714)
   Call: (273) [system] compound(";;             vec![expr!((\"bar\"))],")
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!((\"bar\"))],", _221714)
^  Unify: (272) [user] mfix_vars1(";;             vec![expr!((\"bar\"))],", _221714)
^  Call: (273) [user] symbol(";;             vec![expr!((\"bar\"))],")
^  Unify: (273) [user] symbol(";;             vec![expr!((\"bar\"))],")
   Call: (274) [system] atom(";;             vec![expr!((\"bar\"))],")
   Fail: (274) [system] atom(";;             vec![expr!((\"bar\"))],")
^  Fail: (273) [user] symbol(";;             vec![expr!((\"bar\"))],")
^  Redo: (272) [user] mfix_vars1(";;             vec![expr!((\"bar\"))],", _221714)
   Call: (273) [system] ";;             vec![expr!((\"bar\"))],"=_221714
   Exit: (273) [system] ";;             vec![expr!((\"bar\"))],"=";;             vec![expr!((\"bar\"))],"
^  Exit: (272) [user] mfix_vars1(";;             vec![expr!((\"bar\"))],", ";;             vec![expr!((\"bar\"))],")
   Call: (272) [apply] apply:maplist_([1217, 0], _221716, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1217, 0], [_259712|_259714], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1217, _259712)
^  Unify: (273) [user] mfix_vars1(1217, _259712)
   Call: (274) [system] var(1217)
^  Redo: (273) [user] mfix_vars1(1217, _259712)
^  Unify: (273) [user] mfix_vars1(1217, '$VAR'(_264358))
   Call: (274) [system] atom(1217)
^  Redo: (273) [user] mfix_vars1(1217, _259712)
^  Unify: (273) [user] mfix_vars1(1217, _259712)
   Call: (274) [system] 1217==true
^  Redo: (273) [user] mfix_vars1(1217, _259712)
^  Unify: (273) [user] mfix_vars1(1217, _259712)
   Call: (274) [system] 1217==false
^  Redo: (273) [user] mfix_vars1(1217, _259712)
^  Unify: (273) [user] mfix_vars1(1217, _259712)
   Call: (274) [system] 1217==[_273638, _273644]
^  Redo: (273) [user] mfix_vars1(1217, _259712)
^  Unify: (273) [user] mfix_vars1(1217, _259712)
   Call: (274) [system] is_list(1217)
^  Redo: (273) [user] mfix_vars1(1217, _259712)
^  Unify: (273) [user] mfix_vars1(1217, _259712)
   Call: (274) [system] string(1217)
^  Redo: (273) [user] mfix_vars1(1217, _259712)
^  Unify: (273) [user] mfix_vars1(1217, _259712)
   Call: (274) [system] compound(1217)
^  Redo: (273) [user] mfix_vars1(1217, _259712)
^  Unify: (273) [user] mfix_vars1(1217, _259712)
^  Call: (274) [user] symbol(1217)
^  Unify: (274) [user] symbol(1217)
   Call: (275) [system] atom(1217)
   Fail: (275) [system] atom(1217)
^  Fail: (274) [user] symbol(1217)
^  Redo: (273) [user] mfix_vars1(1217, _259712)
   Call: (274) [system] 1217=_259712
   Exit: (274) [system] 1217=1217
^  Exit: (273) [user] mfix_vars1(1217, 1217)
   Call: (273) [apply] apply:maplist_([0], _259714, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_294038|_294040], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _294038)
^  Unify: (274) [user] mfix_vars1(0, _294038)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _294038)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_298684))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _294038)
^  Unify: (274) [user] mfix_vars1(0, _294038)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _294038)
^  Unify: (274) [user] mfix_vars1(0, _294038)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _294038)
^  Unify: (274) [user] mfix_vars1(0, _294038)
   Call: (275) [system] 0==[_307964, _307970]
^  Redo: (274) [user] mfix_vars1(0, _294038)
^  Unify: (274) [user] mfix_vars1(0, _294038)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _294038)
^  Unify: (274) [user] mfix_vars1(0, _294038)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _294038)
^  Unify: (274) [user] mfix_vars1(0, _294038)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _294038)
^  Unify: (274) [user] mfix_vars1(0, _294038)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _294038)
   Call: (275) [system] 0=_294038
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _294040, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1217, 0], [1217, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             vec![expr!((\"bar\"))],", 1217, 0], [";;             vec![expr!((\"bar\"))],", 1217, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             vec![expr!((\"bar\"))],", 1217, 0], [";;             vec![expr!((\"bar\"))],", 1217, 0])
   Call: (270) [system] compound_name_arguments(_188212, '$COMMENT', [";;             vec![expr!((\"bar\"))],", 1217, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT', [";;             vec![expr!((\"bar\"))],", 1217, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0)))
   Call: (267) [system] '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0)\=@='$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _182626)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _344212))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _344212))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _344212))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _344212))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _344212)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _344212)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _349798))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _349798))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _349798)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _349798)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _349798)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0)))
   Call: (267) [system] '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0)\=@='$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _344212)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _177014))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _177014))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _177014))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _177014))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _177014)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _177014)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _372118))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _372118))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _372118)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _372118)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _372118)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0)))
   Call: (267) [system] '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0)\=@='$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _177014)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0)))
   Call: (261) [system] '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0)\=@='$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _400896, [], _400898)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _400896, [], _400898)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _400896, [], _400898)
   Call: (258) [system] atom('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _400896, [], _400898)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _400896, [], _400898)
   Call: (258) [system] compound('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), _410212, _410214)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT', [";;             vec![expr!((\"bar\"))],", 1217, 0])
^  Call: (258) [user] subst_vars([";;             vec![expr!((\"bar\"))],", 1217, 0], _412098, [], _400898)
^  Unify: (258) [user] subst_vars([";;             vec![expr!((\"bar\"))],", 1217, 0], [";;             vec![expr!((\"bar\"))],", 1217, 0], [], [])
   Call: (259) [system] var([";;             vec![expr!((\"bar\"))],", 1217, 0])
^  Redo: (258) [user] subst_vars([";;             vec![expr!((\"bar\"))],", 1217, 0], _412098, [], _400898)
^  Unify: (258) [user] subst_vars([";;             vec![expr!((\"bar\"))],", 1217, 0], [_415834|_415836], [], _400898)
^  Call: (259) [user] subst_vars(";;             vec![expr!((\"bar\"))],", _415834, [], _416774)
^  Unify: (259) [user] subst_vars(";;             vec![expr!((\"bar\"))],", ";;             vec![expr!((\"bar\"))],", [], [])
   Call: (260) [system] var(";;             vec![expr!((\"bar\"))],")
^  Redo: (259) [user] subst_vars(";;             vec![expr!((\"bar\"))],", _415834, [], _416774)
^  Unify: (259) [user] subst_vars(";;             vec![expr!((\"bar\"))],", _415834, [], _416774)
   Call: (260) [system] atom(";;             vec![expr!((\"bar\"))],")
^  Redo: (259) [user] subst_vars(";;             vec![expr!((\"bar\"))],", _415834, [], _416774)
^  Unify: (259) [user] subst_vars(";;             vec![expr!((\"bar\"))],", _415834, [], _416774)
   Call: (260) [system] compound(";;             vec![expr!((\"bar\"))],")
^  Redo: (259) [user] subst_vars(";;             vec![expr!((\"bar\"))],", _415834, [], _416774)
^  Unify: (259) [user] subst_vars(";;             vec![expr!((\"bar\"))],", ";;             vec![expr!((\"bar\"))],", [], [])
^  Exit: (259) [user] subst_vars(";;             vec![expr!((\"bar\"))],", ";;             vec![expr!((\"bar\"))],", [], [])
^  Call: (259) [user] subst_vars([1217, 0], _415836, [], _400898)
^  Unify: (259) [user] subst_vars([1217, 0], [1217, 0], [], [])
   Call: (260) [system] var([1217, 0])
^  Redo: (259) [user] subst_vars([1217, 0], _415836, [], _400898)
^  Unify: (259) [user] subst_vars([1217, 0], [_431706|_431708], [], _400898)
^  Call: (260) [user] subst_vars(1217, _431706, [], _432646)
^  Unify: (260) [user] subst_vars(1217, 1217, [], [])
   Call: (261) [system] var(1217)
^  Redo: (260) [user] subst_vars(1217, _431706, [], _432646)
^  Unify: (260) [user] subst_vars(1217, _431706, [], _432646)
   Call: (261) [system] atom(1217)
^  Redo: (260) [user] subst_vars(1217, _431706, [], _432646)
^  Unify: (260) [user] subst_vars(1217, _431706, [], _432646)
   Call: (261) [system] compound(1217)
^  Redo: (260) [user] subst_vars(1217, _431706, [], _432646)
^  Unify: (260) [user] subst_vars(1217, 1217, [], [])
^  Exit: (260) [user] subst_vars(1217, 1217, [], [])
^  Call: (260) [user] subst_vars([0], _431708, [], _400898)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _431708, [], _400898)
^  Unify: (260) [user] subst_vars([0], [_447578|_447580], [], _400898)
^  Call: (261) [user] subst_vars(0, _447578, [], _448518)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _447578, [], _448518)
^  Unify: (261) [user] subst_vars(0, _447578, [], _448518)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _447578, [], _448518)
^  Unify: (261) [user] subst_vars(0, _447578, [], _448518)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _447578, [], _448518)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _447580, [], _400898)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _447580, [], _400898)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1217, 0], [1217, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             vec![expr!((\"bar\"))],", 1217, 0], [";;             vec![expr!((\"bar\"))],", 1217, 0], [], [])
   Call: (258) [system] compound_name_arguments(_400896, '$COMMENT', [";;             vec![expr!((\"bar\"))],", 1217, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT', [";;             vec![expr!((\"bar\"))],", 1217, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), [], [])
   Call: (257) [system] _470936=metta_file_buffer(+, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             vec![expr!((\"bar\"))],", 1217, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1218, 0, 44313, '$COMMENT'(";;         ]));", 1218, 0), '$stream_position'(44313, 1218, 0, 44313)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         ]));", 1218, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         ]));", 1218, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         ]));", 1218, 0), _5948))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         ]));", 1218, 0), _5948))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         ]));", 1218, 0), _5948)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         ]));", 1218, 0), _5948)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         ]));", 1218, 0), _5948)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         ]));", 1218, 0), _5948)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         ]));", 1218, 0), _11290))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         ]));", 1218, 0), _11290))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         ]));", 1218, 0), _11290))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         ]));", 1218, 0), _11290))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         ]));", 1218, 0), _11290)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         ]));", 1218, 0), _11290)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         ]));", 1218, 0), _16876))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         ]));", 1218, 0), _16876))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         ]));", 1218, 0), _16876)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         ]));", 1218, 0), _16876)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         ]));", 1218, 0), _16876)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         ]));", 1218, 0), _16876)
   Call: (270) [system] var('$COMMENT'(";;         ]));", 1218, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         ]));", 1218, 0), _16876)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         ]));", 1218, 0), '$VAR'(_24336))
   Call: (270) [system] atom('$COMMENT'(";;         ]));", 1218, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         ]));", 1218, 0), _16876)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         ]));", 1218, 0), _16876)
   Call: (270) [system] '$COMMENT'(";;         ]));", 1218, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         ]));", 1218, 0), _16876)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         ]));", 1218, 0), _16876)
   Call: (270) [system] '$COMMENT'(";;         ]));", 1218, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         ]));", 1218, 0), _16876)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         ]));", 1218, 0), _16876)
   Call: (270) [system] '$COMMENT'(";;         ]));", 1218, 0)==[_33616, _33622]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         ]));", 1218, 0), _16876)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         ]));", 1218, 0), _16876)
   Call: (270) [system] is_list('$COMMENT'(";;         ]));", 1218, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         ]));", 1218, 0), _16876)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         ]));", 1218, 0), _16876)
   Call: (270) [system] string('$COMMENT'(";;         ]));", 1218, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         ]));", 1218, 0), _16876)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         ]));", 1218, 0), _16876)
   Call: (270) [system] compound('$COMMENT'(";;         ]));", 1218, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         ]));", 1218, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         ]));", 1218, 0), _43818, _43820)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         ]));", 1218, 0), '$COMMENT', [";;         ]));", 1218, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         ]));", 1218, 0], _47560)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         ]));", 1218, 0], _47560)
   Call: (271) [apply] apply:maplist_([";;         ]));", 1218, 0], _47560, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         ]));", 1218, 0], [_50378|_50380], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         ]));", _50378)
^  Unify: (272) [user] mfix_vars1(";;         ]));", _50378)
   Call: (273) [system] var(";;         ]));")
^  Redo: (272) [user] mfix_vars1(";;         ]));", _50378)
^  Unify: (272) [user] mfix_vars1(";;         ]));", '$VAR'(_55024))
   Call: (273) [system] atom(";;         ]));")
^  Redo: (272) [user] mfix_vars1(";;         ]));", _50378)
^  Unify: (272) [user] mfix_vars1(";;         ]));", _50378)
   Call: (273) [system] ";;         ]));"==true
^  Redo: (272) [user] mfix_vars1(";;         ]));", _50378)
^  Unify: (272) [user] mfix_vars1(";;         ]));", _50378)
   Call: (273) [system] ";;         ]));"==false
^  Redo: (272) [user] mfix_vars1(";;         ]));", _50378)
^  Unify: (272) [user] mfix_vars1(";;         ]));", _50378)
   Call: (273) [system] ";;         ]));"==[_64304, _64310]
^  Redo: (272) [user] mfix_vars1(";;         ]));", _50378)
^  Unify: (272) [user] mfix_vars1(";;         ]));", _50378)
   Call: (273) [system] is_list(";;         ]));")
^  Redo: (272) [user] mfix_vars1(";;         ]));", _50378)
^  Unify: (272) [user] mfix_vars1(";;         ]));", _50378)
   Call: (273) [system] string(";;         ]));")
   Exit: (273) [system] string(";;         ]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         ]));", _50378)
^  Unify: (272) [user] mfix_vars1(";;         ]));", _50378)
   Call: (273) [system] compound(";;         ]));")
^  Redo: (272) [user] mfix_vars1(";;         ]));", _50378)
^  Unify: (272) [user] mfix_vars1(";;         ]));", _50378)
^  Call: (273) [user] symbol(";;         ]));")
^  Unify: (273) [user] symbol(";;         ]));")
   Call: (274) [system] atom(";;         ]));")
   Fail: (274) [system] atom(";;         ]));")
^  Fail: (273) [user] symbol(";;         ]));")
^  Redo: (272) [user] mfix_vars1(";;         ]));", _50378)
   Call: (273) [system] ";;         ]));"=_50378
   Exit: (273) [system] ";;         ]));"=";;         ]));"
^  Exit: (272) [user] mfix_vars1(";;         ]));", ";;         ]));")
   Call: (272) [apply] apply:maplist_([1218, 0], _50380, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1218, 0], [_88376|_88378], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1218, _88376)
^  Unify: (273) [user] mfix_vars1(1218, _88376)
   Call: (274) [system] var(1218)
^  Redo: (273) [user] mfix_vars1(1218, _88376)
^  Unify: (273) [user] mfix_vars1(1218, '$VAR'(_93022))
   Call: (274) [system] atom(1218)
^  Redo: (273) [user] mfix_vars1(1218, _88376)
^  Unify: (273) [user] mfix_vars1(1218, _88376)
   Call: (274) [system] 1218==true
^  Redo: (273) [user] mfix_vars1(1218, _88376)
^  Unify: (273) [user] mfix_vars1(1218, _88376)
   Call: (274) [system] 1218==false
^  Redo: (273) [user] mfix_vars1(1218, _88376)
^  Unify: (273) [user] mfix_vars1(1218, _88376)
   Call: (274) [system] 1218==[_102302, _102308]
^  Redo: (273) [user] mfix_vars1(1218, _88376)
^  Unify: (273) [user] mfix_vars1(1218, _88376)
   Call: (274) [system] is_list(1218)
^  Redo: (273) [user] mfix_vars1(1218, _88376)
^  Unify: (273) [user] mfix_vars1(1218, _88376)
   Call: (274) [system] string(1218)
^  Redo: (273) [user] mfix_vars1(1218, _88376)
^  Unify: (273) [user] mfix_vars1(1218, _88376)
   Call: (274) [system] compound(1218)
^  Redo: (273) [user] mfix_vars1(1218, _88376)
^  Unify: (273) [user] mfix_vars1(1218, _88376)
^  Call: (274) [user] symbol(1218)
^  Unify: (274) [user] symbol(1218)
   Call: (275) [system] atom(1218)
   Fail: (275) [system] atom(1218)
^  Fail: (274) [user] symbol(1218)
^  Redo: (273) [user] mfix_vars1(1218, _88376)
   Call: (274) [system] 1218=_88376
   Exit: (274) [system] 1218=1218
^  Exit: (273) [user] mfix_vars1(1218, 1218)
   Call: (273) [apply] apply:maplist_([0], _88378, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_122702|_122704], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _122702)
^  Unify: (274) [user] mfix_vars1(0, _122702)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _122702)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_127348))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _122702)
^  Unify: (274) [user] mfix_vars1(0, _122702)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _122702)
^  Unify: (274) [user] mfix_vars1(0, _122702)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _122702)
^  Unify: (274) [user] mfix_vars1(0, _122702)
   Call: (275) [system] 0==[_136628, _136634]
^  Redo: (274) [user] mfix_vars1(0, _122702)
^  Unify: (274) [user] mfix_vars1(0, _122702)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _122702)
^  Unify: (274) [user] mfix_vars1(0, _122702)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _122702)
^  Unify: (274) [user] mfix_vars1(0, _122702)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _122702)
^  Unify: (274) [user] mfix_vars1(0, _122702)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _122702)
   Call: (275) [system] 0=_122702
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _122704, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1218, 0], [1218, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         ]));", 1218, 0], [";;         ]));", 1218, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         ]));", 1218, 0], [";;         ]));", 1218, 0])
   Call: (270) [system] compound_name_arguments(_16876, '$COMMENT', [";;         ]));", 1218, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         ]));", 1218, 0), '$COMMENT', [";;         ]));", 1218, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0)))
   Call: (267) [system] '$COMMENT'(";;         ]));", 1218, 0)\=@='$COMMENT'(";;         ]));", 1218, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         ]));", 1218, 0), _11290)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         ]));", 1218, 0), _172876))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         ]));", 1218, 0), _172876))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         ]));", 1218, 0), _172876))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         ]));", 1218, 0), _172876))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         ]));", 1218, 0), _172876)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         ]));", 1218, 0), _172876)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         ]));", 1218, 0), _178462))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         ]));", 1218, 0), _178462))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         ]));", 1218, 0), _178462)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         ]));", 1218, 0), _178462)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         ]));", 1218, 0), _178462)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0)))
   Call: (267) [system] '$COMMENT'(";;         ]));", 1218, 0)\=@='$COMMENT'(";;         ]));", 1218, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         ]));", 1218, 0), _172876)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         ]));", 1218, 0), _5948))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         ]));", 1218, 0), _5948))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         ]));", 1218, 0), _5948))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         ]));", 1218, 0), _5948))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         ]));", 1218, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         ]));", 1218, 0), _5948)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         ]));", 1218, 0), _200782))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         ]));", 1218, 0), _200782))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         ]));", 1218, 0), _200782)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         ]));", 1218, 0), _200782)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         ]));", 1218, 0), _200782)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0)))
   Call: (267) [system] '$COMMENT'(";;         ]));", 1218, 0)\=@='$COMMENT'(";;         ]));", 1218, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         ]));", 1218, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0)))
   Call: (261) [system] '$COMMENT'(";;         ]));", 1218, 0)\=@='$COMMENT'(";;         ]));", 1218, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         ]));", 1218, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         ]));", 1218, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         ]));", 1218, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         ]));", 1218, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         ]));", 1218, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         ]));", 1218, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         ]));", 1218, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         ]));", 1218, 0), _229560, [], _229562)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         ]));", 1218, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         ]));", 1218, 0), _229560, [], _229562)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         ]));", 1218, 0), _229560, [], _229562)
   Call: (258) [system] atom('$COMMENT'(";;         ]));", 1218, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         ]));", 1218, 0), _229560, [], _229562)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         ]));", 1218, 0), _229560, [], _229562)
   Call: (258) [system] compound('$COMMENT'(";;         ]));", 1218, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         ]));", 1218, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         ]));", 1218, 0), _238876, _238878)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         ]));", 1218, 0), '$COMMENT', [";;         ]));", 1218, 0])
^  Call: (258) [user] subst_vars([";;         ]));", 1218, 0], _240762, [], _229562)
^  Unify: (258) [user] subst_vars([";;         ]));", 1218, 0], [";;         ]));", 1218, 0], [], [])
   Call: (259) [system] var([";;         ]));", 1218, 0])
^  Redo: (258) [user] subst_vars([";;         ]));", 1218, 0], _240762, [], _229562)
^  Unify: (258) [user] subst_vars([";;         ]));", 1218, 0], [_244498|_244500], [], _229562)
^  Call: (259) [user] subst_vars(";;         ]));", _244498, [], _245438)
^  Unify: (259) [user] subst_vars(";;         ]));", ";;         ]));", [], [])
   Call: (260) [system] var(";;         ]));")
^  Redo: (259) [user] subst_vars(";;         ]));", _244498, [], _245438)
^  Unify: (259) [user] subst_vars(";;         ]));", _244498, [], _245438)
   Call: (260) [system] atom(";;         ]));")
^  Redo: (259) [user] subst_vars(";;         ]));", _244498, [], _245438)
^  Unify: (259) [user] subst_vars(";;         ]));", _244498, [], _245438)
   Call: (260) [system] compound(";;         ]));")
^  Redo: (259) [user] subst_vars(";;         ]));", _244498, [], _245438)
^  Unify: (259) [user] subst_vars(";;         ]));", ";;         ]));", [], [])
^  Exit: (259) [user] subst_vars(";;         ]));", ";;         ]));", [], [])
^  Call: (259) [user] subst_vars([1218, 0], _244500, [], _229562)
^  Unify: (259) [user] subst_vars([1218, 0], [1218, 0], [], [])
   Call: (260) [system] var([1218, 0])
^  Redo: (259) [user] subst_vars([1218, 0], _244500, [], _229562)
^  Unify: (259) [user] subst_vars([1218, 0], [_260370|_260372], [], _229562)
^  Call: (260) [user] subst_vars(1218, _260370, [], _261310)
^  Unify: (260) [user] subst_vars(1218, 1218, [], [])
   Call: (261) [system] var(1218)
^  Redo: (260) [user] subst_vars(1218, _260370, [], _261310)
^  Unify: (260) [user] subst_vars(1218, _260370, [], _261310)
   Call: (261) [system] atom(1218)
^  Redo: (260) [user] subst_vars(1218, _260370, [], _261310)
^  Unify: (260) [user] subst_vars(1218, _260370, [], _261310)
   Call: (261) [system] compound(1218)
^  Redo: (260) [user] subst_vars(1218, _260370, [], _261310)
^  Unify: (260) [user] subst_vars(1218, 1218, [], [])
^  Exit: (260) [user] subst_vars(1218, 1218, [], [])
^  Call: (260) [user] subst_vars([0], _260372, [], _229562)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _260372, [], _229562)
^  Unify: (260) [user] subst_vars([0], [_276242|_276244], [], _229562)
^  Call: (261) [user] subst_vars(0, _276242, [], _277182)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _276242, [], _277182)
^  Unify: (261) [user] subst_vars(0, _276242, [], _277182)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _276242, [], _277182)
^  Unify: (261) [user] subst_vars(0, _276242, [], _277182)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _276242, [], _277182)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _276244, [], _229562)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _276244, [], _229562)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1218, 0], [1218, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         ]));", 1218, 0], [";;         ]));", 1218, 0], [], [])
   Call: (258) [system] compound_name_arguments(_229560, '$COMMENT', [";;         ]));", 1218, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         ]));", 1218, 0), '$COMMENT', [";;         ]));", 1218, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         ]));", 1218, 0), '$COMMENT'(";;         ]));", 1218, 0), [], [])
   Call: (257) [system] _299600=metta_file_buffer(+, '$COMMENT'(";;         ]));", 1218, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         ]));", 1218, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         ]));", 1218, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         ]));", 1218, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         ]));", 1218, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         ]));", 1218, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         ]));", 1218, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         ]));", 1218, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         ]));", 1218, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1219, 0, 44329, '$COMMENT'(";; }", 1219, 0), '$stream_position'(44329, 1219, 0, 44329)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1219, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1219, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; }", 1219, 0), _352316))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1219, 0), _352316))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; }", 1219, 0), _352316)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1219, 0), _352316)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1219, 0), _352316)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1219, 0), _352316)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; }", 1219, 0), _357928))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1219, 0), _357928))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1219, 0), _357928))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1219, 0), _357928))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1219, 0), _357928)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1219, 0), _357928)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; }", 1219, 0), _363514))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1219, 0), _363514))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; }", 1219, 0), _363514)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1219, 0), _363514)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; }", 1219, 0), _363514)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1219, 0), _363514)
   Call: (270) [system] var('$COMMENT'(";; }", 1219, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1219, 0), _363514)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1219, 0), '$VAR'(_370974))
   Call: (270) [system] atom('$COMMENT'(";; }", 1219, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1219, 0), _363514)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1219, 0), _363514)
   Call: (270) [system] '$COMMENT'(";; }", 1219, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1219, 0), _363514)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1219, 0), _363514)
   Call: (270) [system] '$COMMENT'(";; }", 1219, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1219, 0), _363514)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1219, 0), _363514)
   Call: (270) [system] '$COMMENT'(";; }", 1219, 0)==[_380254, _380260]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1219, 0), _363514)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1219, 0), _363514)
   Call: (270) [system] is_list('$COMMENT'(";; }", 1219, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1219, 0), _363514)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1219, 0), _363514)
   Call: (270) [system] string('$COMMENT'(";; }", 1219, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1219, 0), _363514)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1219, 0), _363514)
   Call: (270) [system] compound('$COMMENT'(";; }", 1219, 0))
   Exit: (270) [system] compound('$COMMENT'(";; }", 1219, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1219, 0), _390456, _390458)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1219, 0), '$COMMENT', [";; }", 1219, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; }", 1219, 0], _394198)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1219, 0], _394198)
   Call: (271) [apply] apply:maplist_([";; }", 1219, 0], _394198, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; }", 1219, 0], [_397016|_397018], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; }", _397016)
^  Unify: (272) [user] mfix_vars1(";; }", _397016)
   Call: (273) [system] var(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _397016)
^  Unify: (272) [user] mfix_vars1(";; }", '$VAR'(_401662))
   Call: (273) [system] atom(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _397016)
^  Unify: (272) [user] mfix_vars1(";; }", _397016)
   Call: (273) [system] ";; }"==true
^  Redo: (272) [user] mfix_vars1(";; }", _397016)
^  Unify: (272) [user] mfix_vars1(";; }", _397016)
   Call: (273) [system] ";; }"==false
^  Redo: (272) [user] mfix_vars1(";; }", _397016)
^  Unify: (272) [user] mfix_vars1(";; }", _397016)
   Call: (273) [system] ";; }"==[_410942, _410948]
^  Redo: (272) [user] mfix_vars1(";; }", _397016)
^  Unify: (272) [user] mfix_vars1(";; }", _397016)
   Call: (273) [system] is_list(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _397016)
^  Unify: (272) [user] mfix_vars1(";; }", _397016)
   Call: (273) [system] string(";; }")
   Exit: (273) [system] string(";; }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; }", _397016)
^  Unify: (272) [user] mfix_vars1(";; }", _397016)
   Call: (273) [system] compound(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _397016)
^  Unify: (272) [user] mfix_vars1(";; }", _397016)
^  Call: (273) [user] symbol(";; }")
^  Unify: (273) [user] symbol(";; }")
   Call: (274) [system] atom(";; }")
   Fail: (274) [system] atom(";; }")
^  Fail: (273) [user] symbol(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _397016)
   Call: (273) [system] ";; }"=_397016
   Exit: (273) [system] ";; }"=";; }"
^  Exit: (272) [user] mfix_vars1(";; }", ";; }")
   Call: (272) [apply] apply:maplist_([1219, 0], _397018, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1219, 0], [_435014|_435016], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1219, _435014)
^  Unify: (273) [user] mfix_vars1(1219, _435014)
   Call: (274) [system] var(1219)
^  Redo: (273) [user] mfix_vars1(1219, _435014)
^  Unify: (273) [user] mfix_vars1(1219, '$VAR'(_439660))
   Call: (274) [system] atom(1219)
^  Redo: (273) [user] mfix_vars1(1219, _435014)
^  Unify: (273) [user] mfix_vars1(1219, _435014)
   Call: (274) [system] 1219==true
^  Redo: (273) [user] mfix_vars1(1219, _435014)
^  Unify: (273) [user] mfix_vars1(1219, _435014)
   Call: (274) [system] 1219==false
^  Redo: (273) [user] mfix_vars1(1219, _435014)
^  Unify: (273) [user] mfix_vars1(1219, _435014)
   Call: (274) [system] 1219==[_448940, _448946]
^  Redo: (273) [user] mfix_vars1(1219, _435014)
^  Unify: (273) [user] mfix_vars1(1219, _435014)
   Call: (274) [system] is_list(1219)
^  Redo: (273) [user] mfix_vars1(1219, _435014)
^  Unify: (273) [user] mfix_vars1(1219, _435014)
   Call: (274) [system] string(1219)
^  Redo: (273) [user] mfix_vars1(1219, _435014)
^  Unify: (273) [user] mfix_vars1(1219, _435014)
   Call: (274) [system] compound(1219)
^  Redo: (273) [user] mfix_vars1(1219, _435014)
^  Unify: (273) [user] mfix_vars1(1219, _435014)
^  Call: (274) [user] symbol(1219)
^  Unify: (274) [user] symbol(1219)
   Call: (275) [system] atom(1219)
   Fail: (275) [system] atom(1219)
^  Fail: (274) [user] symbol(1219)
^  Redo: (273) [user] mfix_vars1(1219, _435014)
   Call: (274) [system] 1219=_435014
   Exit: (274) [system] 1219=1219
^  Exit: (273) [user] mfix_vars1(1219, 1219)
   Call: (273) [apply] apply:maplist_([0], _435016, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_469340|_469342], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _469340)
^  Unify: (274) [user] mfix_vars1(0, _469340)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _469340)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_473986))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _469340)
^  Unify: (274) [user] mfix_vars1(0, _469340)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _469340)
^  Unify: (274) [user] mfix_vars1(0, _469340)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _469340)
^  Unify: (274) [user] mfix_vars1(0, _469340)
   Call: (275) [system] 0==[_483266, _483272]
^  Redo: (274) [user] mfix_vars1(0, _469340)
^  Unify: (274) [user] mfix_vars1(0, _469340)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _469340)
^  Unify: (274) [user] mfix_vars1(0, _469340)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _469340)
^  Unify: (274) [user] mfix_vars1(0, _469340)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _469340)
^  Unify: (274) [user] mfix_vars1(0, _469340)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _469340)
   Call: (275) [system] 0=_469340
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _469342, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1219, 0], [1219, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; }", 1219, 0], [";; }", 1219, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1219, 0], [";; }", 1219, 0])
   Call: (270) [system] compound_name_arguments(_363514, '$COMMENT', [";; }", 1219, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1219, 0), '$COMMENT', [";; }", 1219, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1219, 0)\=@='$COMMENT'(";; }", 1219, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1219, 0), _357928)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; }", 1219, 0), _519514))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1219, 0), _519514))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1219, 0), _519514))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1219, 0), _519514))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1219, 0), _5964)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1219, 0), _5964)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; }", 1219, 0), _7264))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1219, 0), _7264))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; }", 1219, 0), _7264)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1219, 0), _7264)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; }", 1219, 0), _7264)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1219, 0)\=@='$COMMENT'(";; }", 1219, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1219, 0), _5964)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; }", 1219, 0), _5942))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1219, 0), _5942))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1219, 0), _5942))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1219, 0), _5942))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1219, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1219, 0), _5942)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; }", 1219, 0), _29584))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1219, 0), _29584))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; }", 1219, 0), _29584)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1219, 0), _29584)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; }", 1219, 0), _29584)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1219, 0)\=@='$COMMENT'(";; }", 1219, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1219, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0)))
   Call: (261) [system] '$COMMENT'(";; }", 1219, 0)\=@='$COMMENT'(";; }", 1219, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1219, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1219, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1219, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1219, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1219, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; }", 1219, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; }", 1219, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; }", 1219, 0), _58362, [], _58364)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; }", 1219, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1219, 0), _58362, [], _58364)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1219, 0), _58362, [], _58364)
   Call: (258) [system] atom('$COMMENT'(";; }", 1219, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1219, 0), _58362, [], _58364)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1219, 0), _58362, [], _58364)
   Call: (258) [system] compound('$COMMENT'(";; }", 1219, 0))
   Exit: (258) [system] compound('$COMMENT'(";; }", 1219, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1219, 0), _67678, _67680)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1219, 0), '$COMMENT', [";; }", 1219, 0])
^  Call: (258) [user] subst_vars([";; }", 1219, 0], _69564, [], _58364)
^  Unify: (258) [user] subst_vars([";; }", 1219, 0], [";; }", 1219, 0], [], [])
   Call: (259) [system] var([";; }", 1219, 0])
^  Redo: (258) [user] subst_vars([";; }", 1219, 0], _69564, [], _58364)
^  Unify: (258) [user] subst_vars([";; }", 1219, 0], [_73300|_73302], [], _58364)
^  Call: (259) [user] subst_vars(";; }", _73300, [], _74240)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
   Call: (260) [system] var(";; }")
^  Redo: (259) [user] subst_vars(";; }", _73300, [], _74240)
^  Unify: (259) [user] subst_vars(";; }", _73300, [], _74240)
   Call: (260) [system] atom(";; }")
^  Redo: (259) [user] subst_vars(";; }", _73300, [], _74240)
^  Unify: (259) [user] subst_vars(";; }", _73300, [], _74240)
   Call: (260) [system] compound(";; }")
^  Redo: (259) [user] subst_vars(";; }", _73300, [], _74240)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Exit: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Call: (259) [user] subst_vars([1219, 0], _73302, [], _58364)
^  Unify: (259) [user] subst_vars([1219, 0], [1219, 0], [], [])
   Call: (260) [system] var([1219, 0])
^  Redo: (259) [user] subst_vars([1219, 0], _73302, [], _58364)
^  Unify: (259) [user] subst_vars([1219, 0], [_89172|_89174], [], _58364)
^  Call: (260) [user] subst_vars(1219, _89172, [], _90112)
^  Unify: (260) [user] subst_vars(1219, 1219, [], [])
   Call: (261) [system] var(1219)
^  Redo: (260) [user] subst_vars(1219, _89172, [], _90112)
^  Unify: (260) [user] subst_vars(1219, _89172, [], _90112)
   Call: (261) [system] atom(1219)
^  Redo: (260) [user] subst_vars(1219, _89172, [], _90112)
^  Unify: (260) [user] subst_vars(1219, _89172, [], _90112)
   Call: (261) [system] compound(1219)
^  Redo: (260) [user] subst_vars(1219, _89172, [], _90112)
^  Unify: (260) [user] subst_vars(1219, 1219, [], [])
^  Exit: (260) [user] subst_vars(1219, 1219, [], [])
^  Call: (260) [user] subst_vars([0], _89174, [], _58364)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _89174, [], _58364)
^  Unify: (260) [user] subst_vars([0], [_105044|_105046], [], _58364)
^  Call: (261) [user] subst_vars(0, _105044, [], _105984)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _105044, [], _105984)
^  Unify: (261) [user] subst_vars(0, _105044, [], _105984)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _105044, [], _105984)
^  Unify: (261) [user] subst_vars(0, _105044, [], _105984)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _105044, [], _105984)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _105046, [], _58364)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _105046, [], _58364)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1219, 0], [1219, 0], [], [])
^  Exit: (258) [user] subst_vars([";; }", 1219, 0], [";; }", 1219, 0], [], [])
   Call: (258) [system] compound_name_arguments(_58362, '$COMMENT', [";; }", 1219, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1219, 0), '$COMMENT', [";; }", 1219, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; }", 1219, 0), '$COMMENT'(";; }", 1219, 0), [], [])
   Call: (257) [system] _128402=metta_file_buffer(+, '$COMMENT'(";; }", 1219, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; }", 1219, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; }", 1219, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1219, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1219, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1219, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1219, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1219, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1219, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1238, 0, 44515, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$stream_position'(44515, 1238, 0, 44515)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _181138))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _181138))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _181138)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _181138)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _181138)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _181138)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _186750))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _186750))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _186750))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _186750))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _186750)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _186750)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _192336))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _192336))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _192336)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _192336)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _192336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _192336)
   Call: (270) [system] var('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _192336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$VAR'(_199796))
   Call: (270) [system] atom('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _192336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _192336)
   Call: (270) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _192336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _192336)
   Call: (270) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _192336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _192336)
   Call: (270) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0)==[_209076, _209082]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _192336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _192336)
   Call: (270) [system] is_list('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _192336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _192336)
   Call: (270) [system] string('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _192336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _192336)
   Call: (270) [system] compound('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
   Exit: (270) [system] compound('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _219278, _219280)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT', [";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0], _223020)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0], _223020)
   Call: (271) [apply] apply:maplist_([";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0], _223020, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0], [_225838|_225840], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _225838)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _225838)
   Call: (273) [system] var(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });")
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _225838)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", '$VAR'(_230484))
   Call: (273) [system] atom(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });")
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _225838)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _225838)
   Call: (273) [system] ";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });"==true
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _225838)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _225838)
   Call: (273) [system] ";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });"==false
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _225838)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _225838)
   Call: (273) [system] ";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });"==[_239764, _239770]
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _225838)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _225838)
   Call: (273) [system] is_list(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });")
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _225838)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _225838)
   Call: (273) [system] string(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });")
   Exit: (273) [system] string(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _225838)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _225838)
   Call: (273) [system] compound(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });")
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _225838)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _225838)
^  Call: (273) [user] symbol(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });")
^  Unify: (273) [user] symbol(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });")
   Call: (274) [system] atom(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });")
   Fail: (274) [system] atom(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });")
^  Fail: (273) [user] symbol(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });")
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _225838)
   Call: (273) [system] ";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });"=_225838
   Exit: (273) [system] ";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });"=";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });"
^  Exit: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", ";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });")
   Call: (272) [apply] apply:maplist_([1238, 0], _225840, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1238, 0], [_263836|_263838], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1238, _263836)
^  Unify: (273) [user] mfix_vars1(1238, _263836)
   Call: (274) [system] var(1238)
^  Redo: (273) [user] mfix_vars1(1238, _263836)
^  Unify: (273) [user] mfix_vars1(1238, '$VAR'(_268482))
   Call: (274) [system] atom(1238)
^  Redo: (273) [user] mfix_vars1(1238, _263836)
^  Unify: (273) [user] mfix_vars1(1238, _263836)
   Call: (274) [system] 1238==true
^  Redo: (273) [user] mfix_vars1(1238, _263836)
^  Unify: (273) [user] mfix_vars1(1238, _263836)
   Call: (274) [system] 1238==false
^  Redo: (273) [user] mfix_vars1(1238, _263836)
^  Unify: (273) [user] mfix_vars1(1238, _263836)
   Call: (274) [system] 1238==[_277762, _277768]
^  Redo: (273) [user] mfix_vars1(1238, _263836)
^  Unify: (273) [user] mfix_vars1(1238, _263836)
   Call: (274) [system] is_list(1238)
^  Redo: (273) [user] mfix_vars1(1238, _263836)
^  Unify: (273) [user] mfix_vars1(1238, _263836)
   Call: (274) [system] string(1238)
^  Redo: (273) [user] mfix_vars1(1238, _263836)
^  Unify: (273) [user] mfix_vars1(1238, _263836)
   Call: (274) [system] compound(1238)
^  Redo: (273) [user] mfix_vars1(1238, _263836)
^  Unify: (273) [user] mfix_vars1(1238, _263836)
^  Call: (274) [user] symbol(1238)
^  Unify: (274) [user] symbol(1238)
   Call: (275) [system] atom(1238)
   Fail: (275) [system] atom(1238)
^  Fail: (274) [user] symbol(1238)
^  Redo: (273) [user] mfix_vars1(1238, _263836)
   Call: (274) [system] 1238=_263836
   Exit: (274) [system] 1238=1238
^  Exit: (273) [user] mfix_vars1(1238, 1238)
   Call: (273) [apply] apply:maplist_([0], _263838, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_298162|_298164], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _298162)
^  Unify: (274) [user] mfix_vars1(0, _298162)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _298162)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_302808))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _298162)
^  Unify: (274) [user] mfix_vars1(0, _298162)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _298162)
^  Unify: (274) [user] mfix_vars1(0, _298162)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _298162)
^  Unify: (274) [user] mfix_vars1(0, _298162)
   Call: (275) [system] 0==[_312088, _312094]
^  Redo: (274) [user] mfix_vars1(0, _298162)
^  Unify: (274) [user] mfix_vars1(0, _298162)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _298162)
^  Unify: (274) [user] mfix_vars1(0, _298162)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _298162)
^  Unify: (274) [user] mfix_vars1(0, _298162)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _298162)
^  Unify: (274) [user] mfix_vars1(0, _298162)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _298162)
   Call: (275) [system] 0=_298162
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _298164, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1238, 0], [1238, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0], [";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0], [";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0])
   Call: (270) [system] compound_name_arguments(_192336, '$COMMENT', [";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT', [";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0)))
   Call: (267) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0)\=@='$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _186750)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _348336))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _348336))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _348336))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _348336))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _348336)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _348336)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _353922))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _353922))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _353922)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _353922)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _353922)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0)))
   Call: (267) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0)\=@='$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _348336)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _181138))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _181138))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _181138))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _181138))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _181138)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _181138)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _376242))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _376242))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _376242)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _376242)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _376242)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0)))
   Call: (267) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0)\=@='$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _181138)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0)))
   Call: (261) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0)\=@='$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _405020, [], _405022)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _405020, [], _405022)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _405020, [], _405022)
   Call: (258) [system] atom('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _405020, [], _405022)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _405020, [], _405022)
   Call: (258) [system] compound('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
   Exit: (258) [system] compound('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), _414336, _414338)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT', [";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0])
^  Call: (258) [user] subst_vars([";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0], _416222, [], _405022)
^  Unify: (258) [user] subst_vars([";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0], [";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0], [], [])
   Call: (259) [system] var([";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0])
^  Redo: (258) [user] subst_vars([";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0], _416222, [], _405022)
^  Unify: (258) [user] subst_vars([";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0], [_419958|_419960], [], _405022)
^  Call: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _419958, [], _420898)
^  Unify: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", ";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", [], [])
   Call: (260) [system] var(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });")
^  Redo: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _419958, [], _420898)
^  Unify: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _419958, [], _420898)
   Call: (260) [system] atom(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });")
^  Redo: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _419958, [], _420898)
^  Unify: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _419958, [], _420898)
   Call: (260) [system] compound(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });")
^  Redo: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", _419958, [], _420898)
^  Unify: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", ";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", [], [])
^  Exit: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", ";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", [], [])
^  Call: (259) [user] subst_vars([1238, 0], _419960, [], _405022)
^  Unify: (259) [user] subst_vars([1238, 0], [1238, 0], [], [])
   Call: (260) [system] var([1238, 0])
^  Redo: (259) [user] subst_vars([1238, 0], _419960, [], _405022)
^  Unify: (259) [user] subst_vars([1238, 0], [_435830|_435832], [], _405022)
^  Call: (260) [user] subst_vars(1238, _435830, [], _436770)
^  Unify: (260) [user] subst_vars(1238, 1238, [], [])
   Call: (261) [system] var(1238)
^  Redo: (260) [user] subst_vars(1238, _435830, [], _436770)
^  Unify: (260) [user] subst_vars(1238, _435830, [], _436770)
   Call: (261) [system] atom(1238)
^  Redo: (260) [user] subst_vars(1238, _435830, [], _436770)
^  Unify: (260) [user] subst_vars(1238, _435830, [], _436770)
   Call: (261) [system] compound(1238)
^  Redo: (260) [user] subst_vars(1238, _435830, [], _436770)
^  Unify: (260) [user] subst_vars(1238, 1238, [], [])
^  Exit: (260) [user] subst_vars(1238, 1238, [], [])
^  Call: (260) [user] subst_vars([0], _435832, [], _405022)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _435832, [], _405022)
^  Unify: (260) [user] subst_vars([0], [_451702|_451704], [], _405022)
^  Call: (261) [user] subst_vars(0, _451702, [], _452642)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _451702, [], _452642)
^  Unify: (261) [user] subst_vars(0, _451702, [], _452642)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _451702, [], _452642)
^  Unify: (261) [user] subst_vars(0, _451702, [], _452642)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _451702, [], _452642)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _451704, [], _405022)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _451704, [], _405022)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1238, 0], [1238, 0], [], [])
^  Exit: (258) [user] subst_vars([";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0], [";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0], [], [])
   Call: (258) [system] compound_name_arguments(_405020, '$COMMENT', [";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT', [";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), [], [])
   Call: (257) [system] _475060=metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"if-equal\"), move |_| { is_equivalent.clone() });", 1238, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1239, 0, 44597, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$stream_position'(44597, 1239, 0, 44597)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _9642))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _9642))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _9642)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _9642)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _9642)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _9642)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _15254))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _15254))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _15254))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _15254))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _15254)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _15254)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _20840))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _20840))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _20840)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _20840)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _20840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _20840)
   Call: (270) [system] var('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _20840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$VAR'(_28300))
   Call: (270) [system] atom('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _20840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _20840)
   Call: (270) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _20840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _20840)
   Call: (270) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _20840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _20840)
   Call: (270) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0)==[_37580, _37586]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _20840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _20840)
   Call: (270) [system] is_list('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _20840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _20840)
   Call: (270) [system] string('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _20840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _20840)
   Call: (270) [system] compound('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
   Exit: (270) [system] compound('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _47782, _47784)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT', [";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0], _51524)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0], _51524)
   Call: (271) [apply] apply:maplist_([";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0], _51524, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0], [_54342|_54344], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _54342)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _54342)
   Call: (273) [system] var(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });")
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _54342)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", '$VAR'(_58988))
   Call: (273) [system] atom(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });")
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _54342)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _54342)
   Call: (273) [system] ";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });"==true
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _54342)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _54342)
   Call: (273) [system] ";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });"==false
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _54342)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _54342)
   Call: (273) [system] ";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });"==[_68268, _68274]
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _54342)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _54342)
   Call: (273) [system] is_list(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });")
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _54342)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _54342)
   Call: (273) [system] string(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });")
   Exit: (273) [system] string(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _54342)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _54342)
   Call: (273) [system] compound(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });")
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _54342)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _54342)
^  Call: (273) [user] symbol(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });")
^  Unify: (273) [user] symbol(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });")
   Call: (274) [system] atom(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });")
   Fail: (274) [system] atom(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });")
^  Fail: (273) [user] symbol(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });")
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _54342)
   Call: (273) [system] ";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });"=_54342
   Exit: (273) [system] ";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });"=";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });"
^  Exit: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", ";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });")
   Call: (272) [apply] apply:maplist_([1239, 0], _54344, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1239, 0], [_92340|_92342], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1239, _92340)
^  Unify: (273) [user] mfix_vars1(1239, _92340)
   Call: (274) [system] var(1239)
^  Redo: (273) [user] mfix_vars1(1239, _92340)
^  Unify: (273) [user] mfix_vars1(1239, '$VAR'(_96986))
   Call: (274) [system] atom(1239)
^  Redo: (273) [user] mfix_vars1(1239, _92340)
^  Unify: (273) [user] mfix_vars1(1239, _92340)
   Call: (274) [system] 1239==true
^  Redo: (273) [user] mfix_vars1(1239, _92340)
^  Unify: (273) [user] mfix_vars1(1239, _92340)
   Call: (274) [system] 1239==false
^  Redo: (273) [user] mfix_vars1(1239, _92340)
^  Unify: (273) [user] mfix_vars1(1239, _92340)
   Call: (274) [system] 1239==[_106266, _106272]
^  Redo: (273) [user] mfix_vars1(1239, _92340)
^  Unify: (273) [user] mfix_vars1(1239, _92340)
   Call: (274) [system] is_list(1239)
^  Redo: (273) [user] mfix_vars1(1239, _92340)
^  Unify: (273) [user] mfix_vars1(1239, _92340)
   Call: (274) [system] string(1239)
^  Redo: (273) [user] mfix_vars1(1239, _92340)
^  Unify: (273) [user] mfix_vars1(1239, _92340)
   Call: (274) [system] compound(1239)
^  Redo: (273) [user] mfix_vars1(1239, _92340)
^  Unify: (273) [user] mfix_vars1(1239, _92340)
^  Call: (274) [user] symbol(1239)
^  Unify: (274) [user] symbol(1239)
   Call: (275) [system] atom(1239)
   Fail: (275) [system] atom(1239)
^  Fail: (274) [user] symbol(1239)
^  Redo: (273) [user] mfix_vars1(1239, _92340)
   Call: (274) [system] 1239=_92340
   Exit: (274) [system] 1239=1239
^  Exit: (273) [user] mfix_vars1(1239, 1239)
   Call: (273) [apply] apply:maplist_([0], _92342, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_126666|_126668], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _126666)
^  Unify: (274) [user] mfix_vars1(0, _126666)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _126666)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_131312))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _126666)
^  Unify: (274) [user] mfix_vars1(0, _126666)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _126666)
^  Unify: (274) [user] mfix_vars1(0, _126666)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _126666)
^  Unify: (274) [user] mfix_vars1(0, _126666)
   Call: (275) [system] 0==[_140592, _140598]
^  Redo: (274) [user] mfix_vars1(0, _126666)
^  Unify: (274) [user] mfix_vars1(0, _126666)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _126666)
^  Unify: (274) [user] mfix_vars1(0, _126666)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _126666)
^  Unify: (274) [user] mfix_vars1(0, _126666)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _126666)
^  Unify: (274) [user] mfix_vars1(0, _126666)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _126666)
   Call: (275) [system] 0=_126666
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _126668, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1239, 0], [1239, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0], [";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0], [";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0])
   Call: (270) [system] compound_name_arguments(_20840, '$COMMENT', [";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT', [";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0)))
   Call: (267) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0)\=@='$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _15254)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _176840))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _176840))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _176840))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _176840))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _176840)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _176840)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _182426))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _182426))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _182426)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _182426)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _182426)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0)))
   Call: (267) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0)\=@='$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _176840)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _9642))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _9642))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _9642))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _9642))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _9642)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _9642)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _204746))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _204746))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _204746)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _204746)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _204746)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0)))
   Call: (267) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0)\=@='$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _9642)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0)))
   Call: (261) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0)\=@='$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _233524, [], _233526)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _233524, [], _233526)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _233524, [], _233526)
   Call: (258) [system] atom('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _233524, [], _233526)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _233524, [], _233526)
   Call: (258) [system] compound('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
   Exit: (258) [system] compound('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), _242840, _242842)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT', [";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0])
^  Call: (258) [user] subst_vars([";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0], _244726, [], _233526)
^  Unify: (258) [user] subst_vars([";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0], [";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0], [], [])
   Call: (259) [system] var([";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0])
^  Redo: (258) [user] subst_vars([";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0], _244726, [], _233526)
^  Unify: (258) [user] subst_vars([";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0], [_248462|_248464], [], _233526)
^  Call: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _248462, [], _249402)
^  Unify: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", ";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", [], [])
   Call: (260) [system] var(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });")
^  Redo: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _248462, [], _249402)
^  Unify: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _248462, [], _249402)
   Call: (260) [system] atom(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });")
^  Redo: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _248462, [], _249402)
^  Unify: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _248462, [], _249402)
   Call: (260) [system] compound(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });")
^  Redo: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", _248462, [], _249402)
^  Unify: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", ";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", [], [])
^  Exit: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", ";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", [], [])
^  Call: (259) [user] subst_vars([1239, 0], _248464, [], _233526)
^  Unify: (259) [user] subst_vars([1239, 0], [1239, 0], [], [])
   Call: (260) [system] var([1239, 0])
^  Redo: (259) [user] subst_vars([1239, 0], _248464, [], _233526)
^  Unify: (259) [user] subst_vars([1239, 0], [_264334|_264336], [], _233526)
^  Call: (260) [user] subst_vars(1239, _264334, [], _265274)
^  Unify: (260) [user] subst_vars(1239, 1239, [], [])
   Call: (261) [system] var(1239)
^  Redo: (260) [user] subst_vars(1239, _264334, [], _265274)
^  Unify: (260) [user] subst_vars(1239, _264334, [], _265274)
   Call: (261) [system] atom(1239)
^  Redo: (260) [user] subst_vars(1239, _264334, [], _265274)
^  Unify: (260) [user] subst_vars(1239, _264334, [], _265274)
   Call: (261) [system] compound(1239)
^  Redo: (260) [user] subst_vars(1239, _264334, [], _265274)
^  Unify: (260) [user] subst_vars(1239, 1239, [], [])
^  Exit: (260) [user] subst_vars(1239, 1239, [], [])
^  Call: (260) [user] subst_vars([0], _264336, [], _233526)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _264336, [], _233526)
^  Unify: (260) [user] subst_vars([0], [_280206|_280208], [], _233526)
^  Call: (261) [user] subst_vars(0, _280206, [], _281146)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _280206, [], _281146)
^  Unify: (261) [user] subst_vars(0, _280206, [], _281146)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _280206, [], _281146)
^  Unify: (261) [user] subst_vars(0, _280206, [], _281146)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _280206, [], _281146)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _280208, [], _233526)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _280208, [], _233526)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1239, 0], [1239, 0], [], [])
^  Exit: (258) [user] subst_vars([";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0], [";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0], [], [])
   Call: (258) [system] compound_name_arguments(_233524, '$COMMENT', [";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT', [";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), [], [])
   Call: (257) [system] _303564=metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"register-module!\"), move |_| { register_module_op.clone() });", 1239, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1240, 0, 44692, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$stream_position'(44692, 1240, 0, 44692)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _356300))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _356300))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _356300)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _356300)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _356300)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _356300)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _361912))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _361912))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _361912))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _361912))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _361912)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _361912)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _367498))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _367498))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _367498)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _367498)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _367498)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _367498)
   Call: (270) [system] var('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _367498)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$VAR'(_374958))
   Call: (270) [system] atom('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _367498)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _367498)
   Call: (270) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _367498)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _367498)
   Call: (270) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _367498)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _367498)
   Call: (270) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0)==[_384238, _384244]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _367498)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _367498)
   Call: (270) [system] is_list('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _367498)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _367498)
   Call: (270) [system] string('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _367498)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _367498)
   Call: (270) [system] compound('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
   Exit: (270) [system] compound('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _394440, _394442)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT', [";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0], _398182)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0], _398182)
   Call: (271) [apply] apply:maplist_([";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0], _398182, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0], [_401000|_401002], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _401000)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _401000)
   Call: (273) [system] var(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });")
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _401000)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", '$VAR'(_405646))
   Call: (273) [system] atom(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });")
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _401000)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _401000)
   Call: (273) [system] ";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });"==true
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _401000)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _401000)
   Call: (273) [system] ";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });"==false
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _401000)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _401000)
   Call: (273) [system] ";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });"==[_414926, _414932]
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _401000)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _401000)
   Call: (273) [system] is_list(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });")
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _401000)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _401000)
   Call: (273) [system] string(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });")
   Exit: (273) [system] string(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _401000)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _401000)
   Call: (273) [system] compound(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });")
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _401000)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _401000)
^  Call: (273) [user] symbol(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });")
^  Unify: (273) [user] symbol(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });")
   Call: (274) [system] atom(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });")
   Fail: (274) [system] atom(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });")
^  Fail: (273) [user] symbol(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });")
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _401000)
   Call: (273) [system] ";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });"=_401000
   Exit: (273) [system] ";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });"=";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });"
^  Exit: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", ";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });")
   Call: (272) [apply] apply:maplist_([1240, 0], _401002, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1240, 0], [_438998|_439000], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1240, _438998)
^  Unify: (273) [user] mfix_vars1(1240, _438998)
   Call: (274) [system] var(1240)
^  Redo: (273) [user] mfix_vars1(1240, _438998)
^  Unify: (273) [user] mfix_vars1(1240, '$VAR'(_443644))
   Call: (274) [system] atom(1240)
^  Redo: (273) [user] mfix_vars1(1240, _438998)
^  Unify: (273) [user] mfix_vars1(1240, _438998)
   Call: (274) [system] 1240==true
^  Redo: (273) [user] mfix_vars1(1240, _438998)
^  Unify: (273) [user] mfix_vars1(1240, _438998)
   Call: (274) [system] 1240==false
^  Redo: (273) [user] mfix_vars1(1240, _438998)
^  Unify: (273) [user] mfix_vars1(1240, _438998)
   Call: (274) [system] 1240==[_452924, _452930]
^  Redo: (273) [user] mfix_vars1(1240, _438998)
^  Unify: (273) [user] mfix_vars1(1240, _438998)
   Call: (274) [system] is_list(1240)
^  Redo: (273) [user] mfix_vars1(1240, _438998)
^  Unify: (273) [user] mfix_vars1(1240, _438998)
   Call: (274) [system] string(1240)
^  Redo: (273) [user] mfix_vars1(1240, _438998)
^  Unify: (273) [user] mfix_vars1(1240, _438998)
   Call: (274) [system] compound(1240)
^  Redo: (273) [user] mfix_vars1(1240, _438998)
^  Unify: (273) [user] mfix_vars1(1240, _438998)
^  Call: (274) [user] symbol(1240)
^  Unify: (274) [user] symbol(1240)
   Call: (275) [system] atom(1240)
   Fail: (275) [system] atom(1240)
^  Fail: (274) [user] symbol(1240)
^  Redo: (273) [user] mfix_vars1(1240, _438998)
   Call: (274) [system] 1240=_438998
   Exit: (274) [system] 1240=1240
^  Exit: (273) [user] mfix_vars1(1240, 1240)
   Call: (273) [apply] apply:maplist_([0], _439000, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_473324|_473326], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _473324)
^  Unify: (274) [user] mfix_vars1(0, _473324)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _473324)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_477970))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _473324)
^  Unify: (274) [user] mfix_vars1(0, _473324)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _473324)
^  Unify: (274) [user] mfix_vars1(0, _473324)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _473324)
^  Unify: (274) [user] mfix_vars1(0, _473324)
   Call: (275) [system] 0==[_487250, _487256]
^  Redo: (274) [user] mfix_vars1(0, _473324)
^  Unify: (274) [user] mfix_vars1(0, _473324)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _473324)
^  Unify: (274) [user] mfix_vars1(0, _473324)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _473324)
^  Unify: (274) [user] mfix_vars1(0, _473324)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _473324)
^  Unify: (274) [user] mfix_vars1(0, _473324)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _473324)
   Call: (275) [system] 0=_473324
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _473326, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1240, 0], [1240, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0], [";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0], [";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0])
   Call: (270) [system] compound_name_arguments(_367498, '$COMMENT', [";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT', [";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0)))
   Call: (267) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0)\=@='$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _361912)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _5986))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _5986))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _5986))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _5986))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _5986)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _5986)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _11172))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _11172))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _11172)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _11172)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _11172)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0)))
   Call: (267) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0)\=@='$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _5986)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _5962))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _5962))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _5962))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _5962))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _5962)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _5962)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _33492))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _33492))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _33492)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _33492)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _33492)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0)))
   Call: (267) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0)\=@='$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _5962)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0)))
   Call: (261) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0)\=@='$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _62270, [], _62272)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _62270, [], _62272)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _62270, [], _62272)
   Call: (258) [system] atom('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _62270, [], _62272)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _62270, [], _62272)
   Call: (258) [system] compound('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
   Exit: (258) [system] compound('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), _71586, _71588)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT', [";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0])
^  Call: (258) [user] subst_vars([";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0], _73472, [], _62272)
^  Unify: (258) [user] subst_vars([";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0], [";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0], [], [])
   Call: (259) [system] var([";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0])
^  Redo: (258) [user] subst_vars([";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0], _73472, [], _62272)
^  Unify: (258) [user] subst_vars([";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0], [_77208|_77210], [], _62272)
^  Call: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _77208, [], _78148)
^  Unify: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", ";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", [], [])
   Call: (260) [system] var(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });")
^  Redo: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _77208, [], _78148)
^  Unify: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _77208, [], _78148)
   Call: (260) [system] atom(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });")
^  Redo: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _77208, [], _78148)
^  Unify: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _77208, [], _78148)
   Call: (260) [system] compound(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });")
^  Redo: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", _77208, [], _78148)
^  Unify: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", ";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", [], [])
^  Exit: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", ";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", [], [])
^  Call: (259) [user] subst_vars([1240, 0], _77210, [], _62272)
^  Unify: (259) [user] subst_vars([1240, 0], [1240, 0], [], [])
   Call: (260) [system] var([1240, 0])
^  Redo: (259) [user] subst_vars([1240, 0], _77210, [], _62272)
^  Unify: (259) [user] subst_vars([1240, 0], [_93080|_93082], [], _62272)
^  Call: (260) [user] subst_vars(1240, _93080, [], _94020)
^  Unify: (260) [user] subst_vars(1240, 1240, [], [])
   Call: (261) [system] var(1240)
^  Redo: (260) [user] subst_vars(1240, _93080, [], _94020)
^  Unify: (260) [user] subst_vars(1240, _93080, [], _94020)
   Call: (261) [system] atom(1240)
^  Redo: (260) [user] subst_vars(1240, _93080, [], _94020)
^  Unify: (260) [user] subst_vars(1240, _93080, [], _94020)
   Call: (261) [system] compound(1240)
^  Redo: (260) [user] subst_vars(1240, _93080, [], _94020)
^  Unify: (260) [user] subst_vars(1240, 1240, [], [])
^  Exit: (260) [user] subst_vars(1240, 1240, [], [])
^  Call: (260) [user] subst_vars([0], _93082, [], _62272)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _93082, [], _62272)
^  Unify: (260) [user] subst_vars([0], [_108952|_108954], [], _62272)
^  Call: (261) [user] subst_vars(0, _108952, [], _109892)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _108952, [], _109892)
^  Unify: (261) [user] subst_vars(0, _108952, [], _109892)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _108952, [], _109892)
^  Unify: (261) [user] subst_vars(0, _108952, [], _109892)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _108952, [], _109892)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _108954, [], _62272)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _108954, [], _62272)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1240, 0], [1240, 0], [], [])
^  Exit: (258) [user] subst_vars([";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0], [";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0], [], [])
   Call: (258) [system] compound_name_arguments(_62270, '$COMMENT', [";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT', [";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), [], [])
   Call: (257) [system] _132310=metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"mod-space!\"), move |_| { mod_space_op.clone() });", 1240, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1241, 0, 44775, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$stream_position'(44775, 1241, 0, 44775)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _185046))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _185046))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _185046)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _185046)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _185046)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _185046)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _190658))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _190658))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _190658))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _190658))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _190658)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _190658)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _196244))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _196244))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _196244)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _196244)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _196244)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _196244)
   Call: (270) [system] var('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _196244)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$VAR'(_203704))
   Call: (270) [system] atom('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _196244)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _196244)
   Call: (270) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _196244)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _196244)
   Call: (270) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _196244)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _196244)
   Call: (270) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0)==[_212984, _212990]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _196244)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _196244)
   Call: (270) [system] is_list('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _196244)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _196244)
   Call: (270) [system] string('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _196244)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _196244)
   Call: (270) [system] compound('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
   Exit: (270) [system] compound('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _223186, _223188)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT', [";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0], _226928)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0], _226928)
   Call: (271) [apply] apply:maplist_([";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0], _226928, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0], [_229746|_229748], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _229746)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _229746)
   Call: (273) [system] var(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });")
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _229746)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", '$VAR'(_234392))
   Call: (273) [system] atom(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });")
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _229746)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _229746)
   Call: (273) [system] ";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });"==true
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _229746)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _229746)
   Call: (273) [system] ";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });"==false
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _229746)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _229746)
   Call: (273) [system] ";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });"==[_243672, _243678]
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _229746)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _229746)
   Call: (273) [system] is_list(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });")
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _229746)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _229746)
   Call: (273) [system] string(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });")
   Exit: (273) [system] string(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _229746)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _229746)
   Call: (273) [system] compound(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });")
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _229746)
^  Unify: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _229746)
^  Call: (273) [user] symbol(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });")
^  Unify: (273) [user] symbol(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });")
   Call: (274) [system] atom(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });")
   Fail: (274) [system] atom(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });")
^  Fail: (273) [user] symbol(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });")
^  Redo: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _229746)
   Call: (273) [system] ";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });"=_229746
   Exit: (273) [system] ";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });"=";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });"
^  Exit: (272) [user] mfix_vars1(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", ";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });")
   Call: (272) [apply] apply:maplist_([1241, 0], _229748, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1241, 0], [_267744|_267746], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1241, _267744)
^  Unify: (273) [user] mfix_vars1(1241, _267744)
   Call: (274) [system] var(1241)
^  Redo: (273) [user] mfix_vars1(1241, _267744)
^  Unify: (273) [user] mfix_vars1(1241, '$VAR'(_272390))
   Call: (274) [system] atom(1241)
^  Redo: (273) [user] mfix_vars1(1241, _267744)
^  Unify: (273) [user] mfix_vars1(1241, _267744)
   Call: (274) [system] 1241==true
^  Redo: (273) [user] mfix_vars1(1241, _267744)
^  Unify: (273) [user] mfix_vars1(1241, _267744)
   Call: (274) [system] 1241==false
^  Redo: (273) [user] mfix_vars1(1241, _267744)
^  Unify: (273) [user] mfix_vars1(1241, _267744)
   Call: (274) [system] 1241==[_281670, _281676]
^  Redo: (273) [user] mfix_vars1(1241, _267744)
^  Unify: (273) [user] mfix_vars1(1241, _267744)
   Call: (274) [system] is_list(1241)
^  Redo: (273) [user] mfix_vars1(1241, _267744)
^  Unify: (273) [user] mfix_vars1(1241, _267744)
   Call: (274) [system] string(1241)
^  Redo: (273) [user] mfix_vars1(1241, _267744)
^  Unify: (273) [user] mfix_vars1(1241, _267744)
   Call: (274) [system] compound(1241)
^  Redo: (273) [user] mfix_vars1(1241, _267744)
^  Unify: (273) [user] mfix_vars1(1241, _267744)
^  Call: (274) [user] symbol(1241)
^  Unify: (274) [user] symbol(1241)
   Call: (275) [system] atom(1241)
   Fail: (275) [system] atom(1241)
^  Fail: (274) [user] symbol(1241)
^  Redo: (273) [user] mfix_vars1(1241, _267744)
   Call: (274) [system] 1241=_267744
   Exit: (274) [system] 1241=1241
^  Exit: (273) [user] mfix_vars1(1241, 1241)
   Call: (273) [apply] apply:maplist_([0], _267746, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_302070|_302072], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _302070)
^  Unify: (274) [user] mfix_vars1(0, _302070)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _302070)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_306716))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _302070)
^  Unify: (274) [user] mfix_vars1(0, _302070)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _302070)
^  Unify: (274) [user] mfix_vars1(0, _302070)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _302070)
^  Unify: (274) [user] mfix_vars1(0, _302070)
   Call: (275) [system] 0==[_315996, _316002]
^  Redo: (274) [user] mfix_vars1(0, _302070)
^  Unify: (274) [user] mfix_vars1(0, _302070)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _302070)
^  Unify: (274) [user] mfix_vars1(0, _302070)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _302070)
^  Unify: (274) [user] mfix_vars1(0, _302070)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _302070)
^  Unify: (274) [user] mfix_vars1(0, _302070)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _302070)
   Call: (275) [system] 0=_302070
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _302072, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1241, 0], [1241, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0], [";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0], [";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0])
   Call: (270) [system] compound_name_arguments(_196244, '$COMMENT', [";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT', [";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0)))
   Call: (267) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0)\=@='$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _190658)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _352244))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _352244))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _352244))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _352244))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _352244)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _352244)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _357830))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _357830))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _357830)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _357830)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _357830)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0)))
   Call: (267) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0)\=@='$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _352244)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _185046))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _185046))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _185046))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _185046))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _185046)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _185046)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _380150))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _380150))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _380150)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _380150)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _380150)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0)))
   Call: (267) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0)\=@='$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _185046)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0)))
   Call: (261) [system] '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0)\=@='$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _408928, [], _408930)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _408928, [], _408930)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _408928, [], _408930)
   Call: (258) [system] atom('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _408928, [], _408930)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _408928, [], _408930)
   Call: (258) [system] compound('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
   Exit: (258) [system] compound('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), _418244, _418246)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT', [";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0])
^  Call: (258) [user] subst_vars([";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0], _420130, [], _408930)
^  Unify: (258) [user] subst_vars([";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0], [";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0], [], [])
   Call: (259) [system] var([";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0])
^  Redo: (258) [user] subst_vars([";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0], _420130, [], _408930)
^  Unify: (258) [user] subst_vars([";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0], [_423866|_423868], [], _408930)
^  Call: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _423866, [], _424806)
^  Unify: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", ";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", [], [])
   Call: (260) [system] var(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });")
^  Redo: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _423866, [], _424806)
^  Unify: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _423866, [], _424806)
   Call: (260) [system] atom(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });")
^  Redo: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _423866, [], _424806)
^  Unify: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _423866, [], _424806)
   Call: (260) [system] compound(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });")
^  Redo: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", _423866, [], _424806)
^  Unify: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", ";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", [], [])
^  Exit: (259) [user] subst_vars(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", ";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", [], [])
^  Call: (259) [user] subst_vars([1241, 0], _423868, [], _408930)
^  Unify: (259) [user] subst_vars([1241, 0], [1241, 0], [], [])
   Call: (260) [system] var([1241, 0])
^  Redo: (259) [user] subst_vars([1241, 0], _423868, [], _408930)
^  Unify: (259) [user] subst_vars([1241, 0], [_439738|_439740], [], _408930)
^  Call: (260) [user] subst_vars(1241, _439738, [], _440678)
^  Unify: (260) [user] subst_vars(1241, 1241, [], [])
   Call: (261) [system] var(1241)
^  Redo: (260) [user] subst_vars(1241, _439738, [], _440678)
^  Unify: (260) [user] subst_vars(1241, _439738, [], _440678)
   Call: (261) [system] atom(1241)
^  Redo: (260) [user] subst_vars(1241, _439738, [], _440678)
^  Unify: (260) [user] subst_vars(1241, _439738, [], _440678)
   Call: (261) [system] compound(1241)
^  Redo: (260) [user] subst_vars(1241, _439738, [], _440678)
^  Unify: (260) [user] subst_vars(1241, 1241, [], [])
^  Exit: (260) [user] subst_vars(1241, 1241, [], [])
^  Call: (260) [user] subst_vars([0], _439740, [], _408930)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _439740, [], _408930)
^  Unify: (260) [user] subst_vars([0], [_455610|_455612], [], _408930)
^  Call: (261) [user] subst_vars(0, _455610, [], _456550)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _455610, [], _456550)
^  Unify: (261) [user] subst_vars(0, _455610, [], _456550)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _455610, [], _456550)
^  Unify: (261) [user] subst_vars(0, _455610, [], _456550)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _455610, [], _456550)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _455612, [], _408930)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _455612, [], _408930)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1241, 0], [1241, 0], [], [])
^  Exit: (258) [user] subst_vars([";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0], [";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0], [], [])
   Call: (258) [system] compound_name_arguments(_408928, '$COMMENT', [";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT', [";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), [], [])
   Call: (257) [system] _478968=metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;; tref.register_token(regex(r\"print-mods!\"), move |_| { print_mods_op.clone() });", 1241, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1242, 0, 44860, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$stream_position'(44860, 1242, 0, 44860)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _14626))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _14626))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _14626)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _14626)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _14626)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _14626)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _20238))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _20238))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _20238))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _20238))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _20238)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _20238)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _25824))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _25824))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _25824)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _25824)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _25824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _25824)
   Call: (270) [system] var('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _25824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$VAR'(_33284))
   Call: (270) [system] atom('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _25824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _25824)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _25824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _25824)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _25824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _25824)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0)==[_42564, _42570]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _25824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _25824)
   Call: (270) [system] is_list('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _25824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _25824)
   Call: (270) [system] string('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _25824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _25824)
   Call: (270) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
   Exit: (270) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _52766, _52768)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0], _56508)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0], _56508)
   Call: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0], _56508, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0], [_59326|_59328], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _59326)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _59326)
   Call: (273) [system] var(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _59326)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", '$VAR'(_63972))
   Call: (273) [system] atom(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _59326)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _59326)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"==true
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _59326)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _59326)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"==false
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _59326)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _59326)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"==[_73252, _73258]
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _59326)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _59326)
   Call: (273) [system] is_list(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _59326)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _59326)
   Call: (273) [system] string(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Exit: (273) [system] string(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _59326)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _59326)
   Call: (273) [system] compound(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _59326)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _59326)
^  Call: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Unify: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Call: (274) [system] atom(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Fail: (274) [system] atom(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Fail: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _59326)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"=_59326
   Exit: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"=";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"
^  Exit: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Call: (272) [apply] apply:maplist_([1242, 0], _59328, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1242, 0], [_97324|_97326], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1242, _97324)
^  Unify: (273) [user] mfix_vars1(1242, _97324)
   Call: (274) [system] var(1242)
^  Redo: (273) [user] mfix_vars1(1242, _97324)
^  Unify: (273) [user] mfix_vars1(1242, '$VAR'(_101970))
   Call: (274) [system] atom(1242)
^  Redo: (273) [user] mfix_vars1(1242, _97324)
^  Unify: (273) [user] mfix_vars1(1242, _97324)
   Call: (274) [system] 1242==true
^  Redo: (273) [user] mfix_vars1(1242, _97324)
^  Unify: (273) [user] mfix_vars1(1242, _97324)
   Call: (274) [system] 1242==false
^  Redo: (273) [user] mfix_vars1(1242, _97324)
^  Unify: (273) [user] mfix_vars1(1242, _97324)
   Call: (274) [system] 1242==[_111250, _111256]
^  Redo: (273) [user] mfix_vars1(1242, _97324)
^  Unify: (273) [user] mfix_vars1(1242, _97324)
   Call: (274) [system] is_list(1242)
^  Redo: (273) [user] mfix_vars1(1242, _97324)
^  Unify: (273) [user] mfix_vars1(1242, _97324)
   Call: (274) [system] string(1242)
^  Redo: (273) [user] mfix_vars1(1242, _97324)
^  Unify: (273) [user] mfix_vars1(1242, _97324)
   Call: (274) [system] compound(1242)
^  Redo: (273) [user] mfix_vars1(1242, _97324)
^  Unify: (273) [user] mfix_vars1(1242, _97324)
^  Call: (274) [user] symbol(1242)
^  Unify: (274) [user] symbol(1242)
   Call: (275) [system] atom(1242)
   Fail: (275) [system] atom(1242)
^  Fail: (274) [user] symbol(1242)
^  Redo: (273) [user] mfix_vars1(1242, _97324)
   Call: (274) [system] 1242=_97324
   Exit: (274) [system] 1242=1242
^  Exit: (273) [user] mfix_vars1(1242, 1242)
   Call: (273) [apply] apply:maplist_([0], _97326, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_131650|_131652], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _131650)
^  Unify: (274) [user] mfix_vars1(0, _131650)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _131650)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_136296))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _131650)
^  Unify: (274) [user] mfix_vars1(0, _131650)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _131650)
^  Unify: (274) [user] mfix_vars1(0, _131650)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _131650)
^  Unify: (274) [user] mfix_vars1(0, _131650)
   Call: (275) [system] 0==[_145576, _145582]
^  Redo: (274) [user] mfix_vars1(0, _131650)
^  Unify: (274) [user] mfix_vars1(0, _131650)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _131650)
^  Unify: (274) [user] mfix_vars1(0, _131650)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _131650)
^  Unify: (274) [user] mfix_vars1(0, _131650)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _131650)
^  Unify: (274) [user] mfix_vars1(0, _131650)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _131650)
   Call: (275) [system] 0=_131650
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _131652, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1242, 0], [1242, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0], [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0], [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0])
   Call: (270) [system] compound_name_arguments(_25824, '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _20238)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _181824))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _181824))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _181824))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _181824))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _181824)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _181824)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _187410))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _187410))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _187410)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _187410)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _187410)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _181824)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _14626))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _14626))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _14626))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _14626))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _14626)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _14626)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _209730))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _209730))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _209730)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _209730)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _209730)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _14626)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0)))
   Call: (261) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _238508, [], _238510)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _238508, [], _238510)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _238508, [], _238510)
   Call: (258) [system] atom('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _238508, [], _238510)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _238508, [], _238510)
   Call: (258) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
   Exit: (258) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), _247824, _247826)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0])
^  Call: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0], _249710, [], _238510)
^  Unify: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0], [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0], [], [])
   Call: (259) [system] var([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0])
^  Redo: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0], _249710, [], _238510)
^  Unify: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0], [_253446|_253448], [], _238510)
^  Call: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _253446, [], _254386)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", [], [])
   Call: (260) [system] var(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _253446, [], _254386)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _253446, [], _254386)
   Call: (260) [system] atom(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _253446, [], _254386)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _253446, [], _254386)
   Call: (260) [system] compound(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _253446, [], _254386)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", [], [])
^  Exit: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", [], [])
^  Call: (259) [user] subst_vars([1242, 0], _253448, [], _238510)
^  Unify: (259) [user] subst_vars([1242, 0], [1242, 0], [], [])
   Call: (260) [system] var([1242, 0])
^  Redo: (259) [user] subst_vars([1242, 0], _253448, [], _238510)
^  Unify: (259) [user] subst_vars([1242, 0], [_269318|_269320], [], _238510)
^  Call: (260) [user] subst_vars(1242, _269318, [], _270258)
^  Unify: (260) [user] subst_vars(1242, 1242, [], [])
   Call: (261) [system] var(1242)
^  Redo: (260) [user] subst_vars(1242, _269318, [], _270258)
^  Unify: (260) [user] subst_vars(1242, _269318, [], _270258)
   Call: (261) [system] atom(1242)
^  Redo: (260) [user] subst_vars(1242, _269318, [], _270258)
^  Unify: (260) [user] subst_vars(1242, _269318, [], _270258)
   Call: (261) [system] compound(1242)
^  Redo: (260) [user] subst_vars(1242, _269318, [], _270258)
^  Unify: (260) [user] subst_vars(1242, 1242, [], [])
^  Exit: (260) [user] subst_vars(1242, 1242, [], [])
^  Call: (260) [user] subst_vars([0], _269320, [], _238510)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _269320, [], _238510)
^  Unify: (260) [user] subst_vars([0], [_285190|_285192], [], _238510)
^  Call: (261) [user] subst_vars(0, _285190, [], _286130)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _285190, [], _286130)
^  Unify: (261) [user] subst_vars(0, _285190, [], _286130)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _285190, [], _286130)
^  Unify: (261) [user] subst_vars(0, _285190, [], _286130)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _285190, [], _286130)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _285192, [], _238510)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _285192, [], _238510)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1242, 0], [1242, 0], [], [])
^  Exit: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0], [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0], [], [])
   Call: (258) [system] compound_name_arguments(_238508, '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), [], [])
   Call: (257) [system] _308548=metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1242, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1243, 0, 44894, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$stream_position'(44894, 1243, 0, 44894)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _361274))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _361274))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _361274)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _361274)
^  Call: (263) [user] untyped_to_metta('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _361274)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _361274)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _366886))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _366886))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _366886))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _366886))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _366886)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _366886)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _372472))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _372472))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _372472)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _372472)
^  Call: (269) [user] mfix_vars1('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _372472)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _372472)
   Call: (270) [system] var('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _372472)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$VAR'(_379932))
   Call: (270) [system] atom('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _372472)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _372472)
   Call: (270) [system] '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _372472)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _372472)
   Call: (270) [system] '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _372472)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _372472)
   Call: (270) [system] '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0)==[_389212, _389218]
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _372472)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _372472)
   Call: (270) [system] is_list('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _372472)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _372472)
   Call: (270) [system] string('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _372472)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _372472)
   Call: (270) [system] compound('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
   Exit: (270) [system] compound('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _399414, _399416)
   Exit: (270) [system] compound_name_arguments('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT', ["; Un-commented Rust Tests with Original Source", 1243, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, ["; Un-commented Rust Tests with Original Source", 1243, 0], _403156)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, ["; Un-commented Rust Tests with Original Source", 1243, 0], _403156)
   Call: (271) [apply] apply:maplist_(["; Un-commented Rust Tests with Original Source", 1243, 0], _403156, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_(["; Un-commented Rust Tests with Original Source", 1243, 0], [_405974|_405976], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1("; Un-commented Rust Tests with Original Source", _405974)
^  Unify: (272) [user] mfix_vars1("; Un-commented Rust Tests with Original Source", _405974)
   Call: (273) [system] var("; Un-commented Rust Tests with Original Source")
^  Redo: (272) [user] mfix_vars1("; Un-commented Rust Tests with Original Source", _405974)
^  Unify: (272) [user] mfix_vars1("; Un-commented Rust Tests with Original Source", '$VAR'(_410620))
   Call: (273) [system] atom("; Un-commented Rust Tests with Original Source")
^  Redo: (272) [user] mfix_vars1("; Un-commented Rust Tests with Original Source", _405974)
^  Unify: (272) [user] mfix_vars1("; Un-commented Rust Tests with Original Source", _405974)
   Call: (273) [system] "; Un-commented Rust Tests with Original Source"==true
^  Redo: (272) [user] mfix_vars1("; Un-commented Rust Tests with Original Source", _405974)
^  Unify: (272) [user] mfix_vars1("; Un-commented Rust Tests with Original Source", _405974)
   Call: (273) [system] "; Un-commented Rust Tests with Original Source"==false
^  Redo: (272) [user] mfix_vars1("; Un-commented Rust Tests with Original Source", _405974)
^  Unify: (272) [user] mfix_vars1("; Un-commented Rust Tests with Original Source", _405974)
   Call: (273) [system] "; Un-commented Rust Tests with Original Source"==[_419900, _419906]
^  Redo: (272) [user] mfix_vars1("; Un-commented Rust Tests with Original Source", _405974)
^  Unify: (272) [user] mfix_vars1("; Un-commented Rust Tests with Original Source", _405974)
   Call: (273) [system] is_list("; Un-commented Rust Tests with Original Source")
^  Redo: (272) [user] mfix_vars1("; Un-commented Rust Tests with Original Source", _405974)
^  Unify: (272) [user] mfix_vars1("; Un-commented Rust Tests with Original Source", _405974)
   Call: (273) [system] string("; Un-commented Rust Tests with Original Source")
   Exit: (273) [system] string("; Un-commented Rust Tests with Original Source")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1("; Un-commented Rust Tests with Original Source", _405974)
^  Unify: (272) [user] mfix_vars1("; Un-commented Rust Tests with Original Source", _405974)
   Call: (273) [system] compound("; Un-commented Rust Tests with Original Source")
^  Redo: (272) [user] mfix_vars1("; Un-commented Rust Tests with Original Source", _405974)
^  Unify: (272) [user] mfix_vars1("; Un-commented Rust Tests with Original Source", _405974)
^  Call: (273) [user] symbol("; Un-commented Rust Tests with Original Source")
^  Unify: (273) [user] symbol("; Un-commented Rust Tests with Original Source")
   Call: (274) [system] atom("; Un-commented Rust Tests with Original Source")
   Fail: (274) [system] atom("; Un-commented Rust Tests with Original Source")
^  Fail: (273) [user] symbol("; Un-commented Rust Tests with Original Source")
^  Redo: (272) [user] mfix_vars1("; Un-commented Rust Tests with Original Source", _405974)
   Call: (273) [system] "; Un-commented Rust Tests with Original Source"=_405974
   Exit: (273) [system] "; Un-commented Rust Tests with Original Source"="; Un-commented Rust Tests with Original Source"
^  Exit: (272) [user] mfix_vars1("; Un-commented Rust Tests with Original Source", "; Un-commented Rust Tests with Original Source")
   Call: (272) [apply] apply:maplist_([1243, 0], _405976, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1243, 0], [_443972|_443974], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1243, _443972)
^  Unify: (273) [user] mfix_vars1(1243, _443972)
   Call: (274) [system] var(1243)
^  Redo: (273) [user] mfix_vars1(1243, _443972)
^  Unify: (273) [user] mfix_vars1(1243, '$VAR'(_448618))
   Call: (274) [system] atom(1243)
^  Redo: (273) [user] mfix_vars1(1243, _443972)
^  Unify: (273) [user] mfix_vars1(1243, _443972)
   Call: (274) [system] 1243==true
^  Redo: (273) [user] mfix_vars1(1243, _443972)
^  Unify: (273) [user] mfix_vars1(1243, _443972)
   Call: (274) [system] 1243==false
^  Redo: (273) [user] mfix_vars1(1243, _443972)
^  Unify: (273) [user] mfix_vars1(1243, _443972)
   Call: (274) [system] 1243==[_457898, _457904]
^  Redo: (273) [user] mfix_vars1(1243, _443972)
^  Unify: (273) [user] mfix_vars1(1243, _443972)
   Call: (274) [system] is_list(1243)
^  Redo: (273) [user] mfix_vars1(1243, _443972)
^  Unify: (273) [user] mfix_vars1(1243, _443972)
   Call: (274) [system] string(1243)
^  Redo: (273) [user] mfix_vars1(1243, _443972)
^  Unify: (273) [user] mfix_vars1(1243, _443972)
   Call: (274) [system] compound(1243)
^  Redo: (273) [user] mfix_vars1(1243, _443972)
^  Unify: (273) [user] mfix_vars1(1243, _443972)
^  Call: (274) [user] symbol(1243)
^  Unify: (274) [user] symbol(1243)
   Call: (275) [system] atom(1243)
   Fail: (275) [system] atom(1243)
^  Fail: (274) [user] symbol(1243)
^  Redo: (273) [user] mfix_vars1(1243, _443972)
   Call: (274) [system] 1243=_443972
   Exit: (274) [system] 1243=1243
^  Exit: (273) [user] mfix_vars1(1243, 1243)
   Call: (273) [apply] apply:maplist_([0], _443974, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_478298|_478300], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _478298)
^  Unify: (274) [user] mfix_vars1(0, _478298)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _478298)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_482944))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _478298)
^  Unify: (274) [user] mfix_vars1(0, _478298)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _478298)
^  Unify: (274) [user] mfix_vars1(0, _478298)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _478298)
^  Unify: (274) [user] mfix_vars1(0, _478298)
   Call: (275) [system] 0==[_492224, _492230]
^  Redo: (274) [user] mfix_vars1(0, _478298)
^  Unify: (274) [user] mfix_vars1(0, _478298)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _478298)
^  Unify: (274) [user] mfix_vars1(0, _478298)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _478298)
^  Unify: (274) [user] mfix_vars1(0, _478298)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _478298)
^  Unify: (274) [user] mfix_vars1(0, _478298)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _478298)
   Call: (275) [system] 0=_478298
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _478300, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1243, 0], [1243, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_(["; Un-commented Rust Tests with Original Source", 1243, 0], ["; Un-commented Rust Tests with Original Source", 1243, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, ["; Un-commented Rust Tests with Original Source", 1243, 0], ["; Un-commented Rust Tests with Original Source", 1243, 0])
   Call: (270) [system] compound_name_arguments(_372472, '$COMMENT', ["; Un-commented Rust Tests with Original Source", 1243, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT', ["; Un-commented Rust Tests with Original Source", 1243, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0)))
   Call: (267) [system] '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0)\=@='$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _5972)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _10454))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _10454))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _10454))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _10454))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _10454)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _10454)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _16040))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _16040))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _16040)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _16040)
^  Call: (269) [user] cons_to_c('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _16040)
^  Unify: (269) [user] cons_to_c('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0)))
   Call: (267) [system] '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0)\=@='$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _10454)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _5952))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _5952))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _5952))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _5952))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _5952)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _38360))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _38360))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _38360)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _38360)
^  Call: (269) [user] cons_to_l('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _38360)
^  Unify: (269) [user] cons_to_l('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0)))
   Call: (267) [system] '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0)\=@='$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0)))
   Call: (261) [system] '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0)\=@='$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Call: (257) [user] subst_vars('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _67138, [], _67140)
^  Unify: (257) [user] subst_vars('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), [], [])
   Call: (258) [system] var('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _67138, [], _67140)
^  Unify: (257) [user] subst_vars('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _67138, [], _67140)
   Call: (258) [system] atom('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _67138, [], _67140)
^  Unify: (257) [user] subst_vars('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _67138, [], _67140)
   Call: (258) [system] compound('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
   Exit: (258) [system] compound('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), _76454, _76456)
   Exit: (258) [system] compound_name_arguments('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT', ["; Un-commented Rust Tests with Original Source", 1243, 0])
^  Call: (258) [user] subst_vars(["; Un-commented Rust Tests with Original Source", 1243, 0], _78340, [], _67140)
^  Unify: (258) [user] subst_vars(["; Un-commented Rust Tests with Original Source", 1243, 0], ["; Un-commented Rust Tests with Original Source", 1243, 0], [], [])
   Call: (259) [system] var(["; Un-commented Rust Tests with Original Source", 1243, 0])
^  Redo: (258) [user] subst_vars(["; Un-commented Rust Tests with Original Source", 1243, 0], _78340, [], _67140)
^  Unify: (258) [user] subst_vars(["; Un-commented Rust Tests with Original Source", 1243, 0], [_82076|_82078], [], _67140)
^  Call: (259) [user] subst_vars("; Un-commented Rust Tests with Original Source", _82076, [], _83016)
^  Unify: (259) [user] subst_vars("; Un-commented Rust Tests with Original Source", "; Un-commented Rust Tests with Original Source", [], [])
   Call: (260) [system] var("; Un-commented Rust Tests with Original Source")
^  Redo: (259) [user] subst_vars("; Un-commented Rust Tests with Original Source", _82076, [], _83016)
^  Unify: (259) [user] subst_vars("; Un-commented Rust Tests with Original Source", _82076, [], _83016)
   Call: (260) [system] atom("; Un-commented Rust Tests with Original Source")
^  Redo: (259) [user] subst_vars("; Un-commented Rust Tests with Original Source", _82076, [], _83016)
^  Unify: (259) [user] subst_vars("; Un-commented Rust Tests with Original Source", _82076, [], _83016)
   Call: (260) [system] compound("; Un-commented Rust Tests with Original Source")
^  Redo: (259) [user] subst_vars("; Un-commented Rust Tests with Original Source", _82076, [], _83016)
^  Unify: (259) [user] subst_vars("; Un-commented Rust Tests with Original Source", "; Un-commented Rust Tests with Original Source", [], [])
^  Exit: (259) [user] subst_vars("; Un-commented Rust Tests with Original Source", "; Un-commented Rust Tests with Original Source", [], [])
^  Call: (259) [user] subst_vars([1243, 0], _82078, [], _67140)
^  Unify: (259) [user] subst_vars([1243, 0], [1243, 0], [], [])
   Call: (260) [system] var([1243, 0])
^  Redo: (259) [user] subst_vars([1243, 0], _82078, [], _67140)
^  Unify: (259) [user] subst_vars([1243, 0], [_97948|_97950], [], _67140)
^  Call: (260) [user] subst_vars(1243, _97948, [], _98888)
^  Unify: (260) [user] subst_vars(1243, 1243, [], [])
   Call: (261) [system] var(1243)
^  Redo: (260) [user] subst_vars(1243, _97948, [], _98888)
^  Unify: (260) [user] subst_vars(1243, _97948, [], _98888)
   Call: (261) [system] atom(1243)
^  Redo: (260) [user] subst_vars(1243, _97948, [], _98888)
^  Unify: (260) [user] subst_vars(1243, _97948, [], _98888)
   Call: (261) [system] compound(1243)
^  Redo: (260) [user] subst_vars(1243, _97948, [], _98888)
^  Unify: (260) [user] subst_vars(1243, 1243, [], [])
^  Exit: (260) [user] subst_vars(1243, 1243, [], [])
^  Call: (260) [user] subst_vars([0], _97950, [], _67140)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _97950, [], _67140)
^  Unify: (260) [user] subst_vars([0], [_113820|_113822], [], _67140)
^  Call: (261) [user] subst_vars(0, _113820, [], _114760)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _113820, [], _114760)
^  Unify: (261) [user] subst_vars(0, _113820, [], _114760)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _113820, [], _114760)
^  Unify: (261) [user] subst_vars(0, _113820, [], _114760)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _113820, [], _114760)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _113822, [], _67140)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _113822, [], _67140)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1243, 0], [1243, 0], [], [])
^  Exit: (258) [user] subst_vars(["; Un-commented Rust Tests with Original Source", 1243, 0], ["; Un-commented Rust Tests with Original Source", 1243, 0], [], [])
   Call: (258) [system] compound_name_arguments(_67138, '$COMMENT', ["; Un-commented Rust Tests with Original Source", 1243, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT', ["; Un-commented Rust Tests with Original Source", 1243, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), [], [])
   Call: (257) [system] _137178=metta_file_buffer(+, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'("; Un-commented Rust Tests with Original Source", 1243, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1244, 0, 44941, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$stream_position'(44941, 1244, 0, 44941)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _189902))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _189902))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _189902)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _189902)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _189902)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _189902)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _195514))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _195514))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _195514))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _195514))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _195514)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _195514)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _201100))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _201100))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _201100)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _201100)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _201100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _201100)
   Call: (270) [system] var('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _201100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$VAR'(_208560))
   Call: (270) [system] atom('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _201100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _201100)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _201100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _201100)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _201100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _201100)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0)==[_217840, _217846]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _201100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _201100)
   Call: (270) [system] is_list('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _201100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _201100)
   Call: (270) [system] string('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _201100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _201100)
   Call: (270) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
   Exit: (270) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _228042, _228044)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0], _231784)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0], _231784)
   Call: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0], _231784, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0], [_234602|_234604], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _234602)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _234602)
   Call: (273) [system] var(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _234602)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", '$VAR'(_239248))
   Call: (273) [system] atom(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _234602)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _234602)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"==true
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _234602)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _234602)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"==false
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _234602)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _234602)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"==[_248528, _248534]
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _234602)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _234602)
   Call: (273) [system] is_list(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _234602)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _234602)
   Call: (273) [system] string(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Exit: (273) [system] string(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _234602)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _234602)
   Call: (273) [system] compound(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _234602)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _234602)
^  Call: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Unify: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Call: (274) [system] atom(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Fail: (274) [system] atom(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Fail: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _234602)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"=_234602
   Exit: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"=";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"
^  Exit: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Call: (272) [apply] apply:maplist_([1244, 0], _234604, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1244, 0], [_272600|_272602], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1244, _272600)
^  Unify: (273) [user] mfix_vars1(1244, _272600)
   Call: (274) [system] var(1244)
^  Redo: (273) [user] mfix_vars1(1244, _272600)
^  Unify: (273) [user] mfix_vars1(1244, '$VAR'(_277246))
   Call: (274) [system] atom(1244)
^  Redo: (273) [user] mfix_vars1(1244, _272600)
^  Unify: (273) [user] mfix_vars1(1244, _272600)
   Call: (274) [system] 1244==true
^  Redo: (273) [user] mfix_vars1(1244, _272600)
^  Unify: (273) [user] mfix_vars1(1244, _272600)
   Call: (274) [system] 1244==false
^  Redo: (273) [user] mfix_vars1(1244, _272600)
^  Unify: (273) [user] mfix_vars1(1244, _272600)
   Call: (274) [system] 1244==[_286526, _286532]
^  Redo: (273) [user] mfix_vars1(1244, _272600)
^  Unify: (273) [user] mfix_vars1(1244, _272600)
   Call: (274) [system] is_list(1244)
^  Redo: (273) [user] mfix_vars1(1244, _272600)
^  Unify: (273) [user] mfix_vars1(1244, _272600)
   Call: (274) [system] string(1244)
^  Redo: (273) [user] mfix_vars1(1244, _272600)
^  Unify: (273) [user] mfix_vars1(1244, _272600)
   Call: (274) [system] compound(1244)
^  Redo: (273) [user] mfix_vars1(1244, _272600)
^  Unify: (273) [user] mfix_vars1(1244, _272600)
^  Call: (274) [user] symbol(1244)
^  Unify: (274) [user] symbol(1244)
   Call: (275) [system] atom(1244)
   Fail: (275) [system] atom(1244)
^  Fail: (274) [user] symbol(1244)
^  Redo: (273) [user] mfix_vars1(1244, _272600)
   Call: (274) [system] 1244=_272600
   Exit: (274) [system] 1244=1244
^  Exit: (273) [user] mfix_vars1(1244, 1244)
   Call: (273) [apply] apply:maplist_([0], _272602, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_306926|_306928], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _306926)
^  Unify: (274) [user] mfix_vars1(0, _306926)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _306926)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_311572))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _306926)
^  Unify: (274) [user] mfix_vars1(0, _306926)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _306926)
^  Unify: (274) [user] mfix_vars1(0, _306926)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _306926)
^  Unify: (274) [user] mfix_vars1(0, _306926)
   Call: (275) [system] 0==[_320852, _320858]
^  Redo: (274) [user] mfix_vars1(0, _306926)
^  Unify: (274) [user] mfix_vars1(0, _306926)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _306926)
^  Unify: (274) [user] mfix_vars1(0, _306926)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _306926)
^  Unify: (274) [user] mfix_vars1(0, _306926)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _306926)
^  Unify: (274) [user] mfix_vars1(0, _306926)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _306926)
   Call: (275) [system] 0=_306926
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _306928, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1244, 0], [1244, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0], [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0], [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0])
   Call: (270) [system] compound_name_arguments(_201100, '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _195514)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _357100))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _357100))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _357100))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _357100))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _357100)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _357100)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _362686))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _362686))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _362686)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _362686)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _362686)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _357100)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _189902))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _189902))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _189902))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _189902))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _189902)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _189902)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _385006))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _385006))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _385006)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _385006)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _385006)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _189902)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0)))
   Call: (261) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _413784, [], _413786)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _413784, [], _413786)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _413784, [], _413786)
   Call: (258) [system] atom('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _413784, [], _413786)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _413784, [], _413786)
   Call: (258) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
   Exit: (258) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), _423100, _423102)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0])
^  Call: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0], _424986, [], _413786)
^  Unify: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0], [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0], [], [])
   Call: (259) [system] var([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0])
^  Redo: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0], _424986, [], _413786)
^  Unify: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0], [_428722|_428724], [], _413786)
^  Call: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _428722, [], _429662)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", [], [])
   Call: (260) [system] var(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _428722, [], _429662)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _428722, [], _429662)
   Call: (260) [system] atom(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _428722, [], _429662)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _428722, [], _429662)
   Call: (260) [system] compound(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _428722, [], _429662)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", [], [])
^  Exit: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", [], [])
^  Call: (259) [user] subst_vars([1244, 0], _428724, [], _413786)
^  Unify: (259) [user] subst_vars([1244, 0], [1244, 0], [], [])
   Call: (260) [system] var([1244, 0])
^  Redo: (259) [user] subst_vars([1244, 0], _428724, [], _413786)
^  Unify: (259) [user] subst_vars([1244, 0], [_444594|_444596], [], _413786)
^  Call: (260) [user] subst_vars(1244, _444594, [], _445534)
^  Unify: (260) [user] subst_vars(1244, 1244, [], [])
   Call: (261) [system] var(1244)
^  Redo: (260) [user] subst_vars(1244, _444594, [], _445534)
^  Unify: (260) [user] subst_vars(1244, _444594, [], _445534)
   Call: (261) [system] atom(1244)
^  Redo: (260) [user] subst_vars(1244, _444594, [], _445534)
^  Unify: (260) [user] subst_vars(1244, _444594, [], _445534)
   Call: (261) [system] compound(1244)
^  Redo: (260) [user] subst_vars(1244, _444594, [], _445534)
^  Unify: (260) [user] subst_vars(1244, 1244, [], [])
^  Exit: (260) [user] subst_vars(1244, 1244, [], [])
^  Call: (260) [user] subst_vars([0], _444596, [], _413786)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _444596, [], _413786)
^  Unify: (260) [user] subst_vars([0], [_460466|_460468], [], _413786)
^  Call: (261) [user] subst_vars(0, _460466, [], _461406)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _460466, [], _461406)
^  Unify: (261) [user] subst_vars(0, _460466, [], _461406)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _460466, [], _461406)
^  Unify: (261) [user] subst_vars(0, _460466, [], _461406)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _460466, [], _461406)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _460468, [], _413786)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _460468, [], _413786)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1244, 0], [1244, 0], [], [])
^  Exit: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0], [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0], [], [])
   Call: (258) [system] compound_name_arguments(_413784, '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), [], [])
   Call: (257) [system] _483824=metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1244, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1246, 0, 44976, '$COMMENT'(";; Original: ", 1246, 0), '$stream_position'(44976, 1246, 0, 44976)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original: ", 1246, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original: ", 1246, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original: ", 1246, 0), _19434))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original: ", 1246, 0), _19434))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original: ", 1246, 0), _19434)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original: ", 1246, 0), _19434)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original: ", 1246, 0), _19434)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original: ", 1246, 0), _19434)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original: ", 1246, 0), _25046))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original: ", 1246, 0), _25046))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original: ", 1246, 0), _25046))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original: ", 1246, 0), _25046))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original: ", 1246, 0), _25046)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original: ", 1246, 0), _25046)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original: ", 1246, 0), _30632))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original: ", 1246, 0), _30632))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original: ", 1246, 0), _30632)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original: ", 1246, 0), _30632)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1246, 0), _30632)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1246, 0), _30632)
   Call: (270) [system] var('$COMMENT'(";; Original: ", 1246, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1246, 0), _30632)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1246, 0), '$VAR'(_38092))
   Call: (270) [system] atom('$COMMENT'(";; Original: ", 1246, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1246, 0), _30632)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1246, 0), _30632)
   Call: (270) [system] '$COMMENT'(";; Original: ", 1246, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1246, 0), _30632)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1246, 0), _30632)
   Call: (270) [system] '$COMMENT'(";; Original: ", 1246, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1246, 0), _30632)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1246, 0), _30632)
   Call: (270) [system] '$COMMENT'(";; Original: ", 1246, 0)==[_47372, _47378]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1246, 0), _30632)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1246, 0), _30632)
   Call: (270) [system] is_list('$COMMENT'(";; Original: ", 1246, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1246, 0), _30632)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1246, 0), _30632)
   Call: (270) [system] string('$COMMENT'(";; Original: ", 1246, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1246, 0), _30632)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1246, 0), _30632)
   Call: (270) [system] compound('$COMMENT'(";; Original: ", 1246, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original: ", 1246, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original: ", 1246, 0), _57574, _57576)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original: ", 1246, 0), '$COMMENT', [";; Original: ", 1246, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original: ", 1246, 0], _61316)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original: ", 1246, 0], _61316)
   Call: (271) [apply] apply:maplist_([";; Original: ", 1246, 0], _61316, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original: ", 1246, 0], [_64134|_64136], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original: ", _64134)
^  Unify: (272) [user] mfix_vars1(";; Original: ", _64134)
   Call: (273) [system] var(";; Original: ")
^  Redo: (272) [user] mfix_vars1(";; Original: ", _64134)
^  Unify: (272) [user] mfix_vars1(";; Original: ", '$VAR'(_68780))
   Call: (273) [system] atom(";; Original: ")
^  Redo: (272) [user] mfix_vars1(";; Original: ", _64134)
^  Unify: (272) [user] mfix_vars1(";; Original: ", _64134)
   Call: (273) [system] ";; Original: "==true
^  Redo: (272) [user] mfix_vars1(";; Original: ", _64134)
^  Unify: (272) [user] mfix_vars1(";; Original: ", _64134)
   Call: (273) [system] ";; Original: "==false
^  Redo: (272) [user] mfix_vars1(";; Original: ", _64134)
^  Unify: (272) [user] mfix_vars1(";; Original: ", _64134)
   Call: (273) [system] ";; Original: "==[_78060, _78066]
^  Redo: (272) [user] mfix_vars1(";; Original: ", _64134)
^  Unify: (272) [user] mfix_vars1(";; Original: ", _64134)
   Call: (273) [system] is_list(";; Original: ")
^  Redo: (272) [user] mfix_vars1(";; Original: ", _64134)
^  Unify: (272) [user] mfix_vars1(";; Original: ", _64134)
   Call: (273) [system] string(";; Original: ")
   Exit: (273) [system] string(";; Original: ")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original: ", _64134)
^  Unify: (272) [user] mfix_vars1(";; Original: ", _64134)
   Call: (273) [system] compound(";; Original: ")
^  Redo: (272) [user] mfix_vars1(";; Original: ", _64134)
^  Unify: (272) [user] mfix_vars1(";; Original: ", _64134)
^  Call: (273) [user] symbol(";; Original: ")
^  Unify: (273) [user] symbol(";; Original: ")
   Call: (274) [system] atom(";; Original: ")
   Fail: (274) [system] atom(";; Original: ")
^  Fail: (273) [user] symbol(";; Original: ")
^  Redo: (272) [user] mfix_vars1(";; Original: ", _64134)
   Call: (273) [system] ";; Original: "=_64134
   Exit: (273) [system] ";; Original: "=";; Original: "
^  Exit: (272) [user] mfix_vars1(";; Original: ", ";; Original: ")
   Call: (272) [apply] apply:maplist_([1246, 0], _64136, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1246, 0], [_102132|_102134], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1246, _102132)
^  Unify: (273) [user] mfix_vars1(1246, _102132)
   Call: (274) [system] var(1246)
^  Redo: (273) [user] mfix_vars1(1246, _102132)
^  Unify: (273) [user] mfix_vars1(1246, '$VAR'(_106778))
   Call: (274) [system] atom(1246)
^  Redo: (273) [user] mfix_vars1(1246, _102132)
^  Unify: (273) [user] mfix_vars1(1246, _102132)
   Call: (274) [system] 1246==true
^  Redo: (273) [user] mfix_vars1(1246, _102132)
^  Unify: (273) [user] mfix_vars1(1246, _102132)
   Call: (274) [system] 1246==false
^  Redo: (273) [user] mfix_vars1(1246, _102132)
^  Unify: (273) [user] mfix_vars1(1246, _102132)
   Call: (274) [system] 1246==[_116058, _116064]
^  Redo: (273) [user] mfix_vars1(1246, _102132)
^  Unify: (273) [user] mfix_vars1(1246, _102132)
   Call: (274) [system] is_list(1246)
^  Redo: (273) [user] mfix_vars1(1246, _102132)
^  Unify: (273) [user] mfix_vars1(1246, _102132)
   Call: (274) [system] string(1246)
^  Redo: (273) [user] mfix_vars1(1246, _102132)
^  Unify: (273) [user] mfix_vars1(1246, _102132)
   Call: (274) [system] compound(1246)
^  Redo: (273) [user] mfix_vars1(1246, _102132)
^  Unify: (273) [user] mfix_vars1(1246, _102132)
^  Call: (274) [user] symbol(1246)
^  Unify: (274) [user] symbol(1246)
   Call: (275) [system] atom(1246)
   Fail: (275) [system] atom(1246)
^  Fail: (274) [user] symbol(1246)
^  Redo: (273) [user] mfix_vars1(1246, _102132)
   Call: (274) [system] 1246=_102132
   Exit: (274) [system] 1246=1246
^  Exit: (273) [user] mfix_vars1(1246, 1246)
   Call: (273) [apply] apply:maplist_([0], _102134, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_136458|_136460], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _136458)
^  Unify: (274) [user] mfix_vars1(0, _136458)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _136458)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_141104))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _136458)
^  Unify: (274) [user] mfix_vars1(0, _136458)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _136458)
^  Unify: (274) [user] mfix_vars1(0, _136458)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _136458)
^  Unify: (274) [user] mfix_vars1(0, _136458)
   Call: (275) [system] 0==[_150384, _150390]
^  Redo: (274) [user] mfix_vars1(0, _136458)
^  Unify: (274) [user] mfix_vars1(0, _136458)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _136458)
^  Unify: (274) [user] mfix_vars1(0, _136458)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _136458)
^  Unify: (274) [user] mfix_vars1(0, _136458)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _136458)
^  Unify: (274) [user] mfix_vars1(0, _136458)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _136458)
   Call: (275) [system] 0=_136458
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _136460, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1246, 0], [1246, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original: ", 1246, 0], [";; Original: ", 1246, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original: ", 1246, 0], [";; Original: ", 1246, 0])
   Call: (270) [system] compound_name_arguments(_30632, '$COMMENT', [";; Original: ", 1246, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original: ", 1246, 0), '$COMMENT', [";; Original: ", 1246, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0)))
   Call: (267) [system] '$COMMENT'(";; Original: ", 1246, 0)\=@='$COMMENT'(";; Original: ", 1246, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original: ", 1246, 0), _25046)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original: ", 1246, 0), _186632))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original: ", 1246, 0), _186632))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original: ", 1246, 0), _186632))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original: ", 1246, 0), _186632))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original: ", 1246, 0), _186632)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original: ", 1246, 0), _186632)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original: ", 1246, 0), _192218))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original: ", 1246, 0), _192218))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original: ", 1246, 0), _192218)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original: ", 1246, 0), _192218)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original: ", 1246, 0), _192218)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0)))
   Call: (267) [system] '$COMMENT'(";; Original: ", 1246, 0)\=@='$COMMENT'(";; Original: ", 1246, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original: ", 1246, 0), _186632)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original: ", 1246, 0), _19434))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original: ", 1246, 0), _19434))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original: ", 1246, 0), _19434))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original: ", 1246, 0), _19434))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original: ", 1246, 0), _19434)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original: ", 1246, 0), _19434)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original: ", 1246, 0), _214538))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original: ", 1246, 0), _214538))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original: ", 1246, 0), _214538)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original: ", 1246, 0), _214538)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original: ", 1246, 0), _214538)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0)))
   Call: (267) [system] '$COMMENT'(";; Original: ", 1246, 0)\=@='$COMMENT'(";; Original: ", 1246, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original: ", 1246, 0), _19434)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0)))
   Call: (261) [system] '$COMMENT'(";; Original: ", 1246, 0)\=@='$COMMENT'(";; Original: ", 1246, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original: ", 1246, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original: ", 1246, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original: ", 1246, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original: ", 1246, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original: ", 1246, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original: ", 1246, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original: ", 1246, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original: ", 1246, 0), _243316, [], _243318)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original: ", 1246, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original: ", 1246, 0), _243316, [], _243318)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original: ", 1246, 0), _243316, [], _243318)
   Call: (258) [system] atom('$COMMENT'(";; Original: ", 1246, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original: ", 1246, 0), _243316, [], _243318)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original: ", 1246, 0), _243316, [], _243318)
   Call: (258) [system] compound('$COMMENT'(";; Original: ", 1246, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original: ", 1246, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original: ", 1246, 0), _252632, _252634)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original: ", 1246, 0), '$COMMENT', [";; Original: ", 1246, 0])
^  Call: (258) [user] subst_vars([";; Original: ", 1246, 0], _254518, [], _243318)
^  Unify: (258) [user] subst_vars([";; Original: ", 1246, 0], [";; Original: ", 1246, 0], [], [])
   Call: (259) [system] var([";; Original: ", 1246, 0])
^  Redo: (258) [user] subst_vars([";; Original: ", 1246, 0], _254518, [], _243318)
^  Unify: (258) [user] subst_vars([";; Original: ", 1246, 0], [_258254|_258256], [], _243318)
^  Call: (259) [user] subst_vars(";; Original: ", _258254, [], _259194)
^  Unify: (259) [user] subst_vars(";; Original: ", ";; Original: ", [], [])
   Call: (260) [system] var(";; Original: ")
^  Redo: (259) [user] subst_vars(";; Original: ", _258254, [], _259194)
^  Unify: (259) [user] subst_vars(";; Original: ", _258254, [], _259194)
   Call: (260) [system] atom(";; Original: ")
^  Redo: (259) [user] subst_vars(";; Original: ", _258254, [], _259194)
^  Unify: (259) [user] subst_vars(";; Original: ", _258254, [], _259194)
   Call: (260) [system] compound(";; Original: ")
^  Redo: (259) [user] subst_vars(";; Original: ", _258254, [], _259194)
^  Unify: (259) [user] subst_vars(";; Original: ", ";; Original: ", [], [])
^  Exit: (259) [user] subst_vars(";; Original: ", ";; Original: ", [], [])
^  Call: (259) [user] subst_vars([1246, 0], _258256, [], _243318)
^  Unify: (259) [user] subst_vars([1246, 0], [1246, 0], [], [])
   Call: (260) [system] var([1246, 0])
^  Redo: (259) [user] subst_vars([1246, 0], _258256, [], _243318)
^  Unify: (259) [user] subst_vars([1246, 0], [_274126|_274128], [], _243318)
^  Call: (260) [user] subst_vars(1246, _274126, [], _275066)
^  Unify: (260) [user] subst_vars(1246, 1246, [], [])
   Call: (261) [system] var(1246)
^  Redo: (260) [user] subst_vars(1246, _274126, [], _275066)
^  Unify: (260) [user] subst_vars(1246, _274126, [], _275066)
   Call: (261) [system] atom(1246)
^  Redo: (260) [user] subst_vars(1246, _274126, [], _275066)
^  Unify: (260) [user] subst_vars(1246, _274126, [], _275066)
   Call: (261) [system] compound(1246)
^  Redo: (260) [user] subst_vars(1246, _274126, [], _275066)
^  Unify: (260) [user] subst_vars(1246, 1246, [], [])
^  Exit: (260) [user] subst_vars(1246, 1246, [], [])
^  Call: (260) [user] subst_vars([0], _274128, [], _243318)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _274128, [], _243318)
^  Unify: (260) [user] subst_vars([0], [_289998|_290000], [], _243318)
^  Call: (261) [user] subst_vars(0, _289998, [], _290938)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _289998, [], _290938)
^  Unify: (261) [user] subst_vars(0, _289998, [], _290938)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _289998, [], _290938)
^  Unify: (261) [user] subst_vars(0, _289998, [], _290938)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _289998, [], _290938)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _290000, [], _243318)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _290000, [], _243318)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1246, 0], [1246, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original: ", 1246, 0], [";; Original: ", 1246, 0], [], [])
   Call: (258) [system] compound_name_arguments(_243316, '$COMMENT', [";; Original: ", 1246, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original: ", 1246, 0), '$COMMENT', [";; Original: ", 1246, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original: ", 1246, 0), '$COMMENT'(";; Original: ", 1246, 0), [], [])
   Call: (257) [system] _313356=metta_file_buffer(+, '$COMMENT'(";; Original: ", 1246, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original: ", 1246, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original: ", 1246, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original: ", 1246, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original: ", 1246, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original: ", 1246, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original: ", 1246, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original: ", 1246, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original: ", 1246, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1247, 0, 44990, '$COMMENT'(";;    #[test]", 1247, 0), '$stream_position'(44990, 1247, 0, 44990)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1247, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1247, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1247, 0), _366074))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1247, 0), _366074))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1247, 0), _366074)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1247, 0), _366074)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1247, 0), _366074)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1247, 0), _366074)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1247, 0), _371686))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1247, 0), _371686))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1247, 0), _371686))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1247, 0), _371686))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1247, 0), _371686)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1247, 0), _371686)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    #[test]", 1247, 0), _377272))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1247, 0), _377272))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    #[test]", 1247, 0), _377272)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1247, 0), _377272)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1247, 0), _377272)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1247, 0), _377272)
   Call: (270) [system] var('$COMMENT'(";;    #[test]", 1247, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1247, 0), _377272)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1247, 0), '$VAR'(_384732))
   Call: (270) [system] atom('$COMMENT'(";;    #[test]", 1247, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1247, 0), _377272)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1247, 0), _377272)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1247, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1247, 0), _377272)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1247, 0), _377272)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1247, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1247, 0), _377272)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1247, 0), _377272)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1247, 0)==[_394012, _394018]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1247, 0), _377272)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1247, 0), _377272)
   Call: (270) [system] is_list('$COMMENT'(";;    #[test]", 1247, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1247, 0), _377272)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1247, 0), _377272)
   Call: (270) [system] string('$COMMENT'(";;    #[test]", 1247, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1247, 0), _377272)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1247, 0), _377272)
   Call: (270) [system] compound('$COMMENT'(";;    #[test]", 1247, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    #[test]", 1247, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1247, 0), _404214, _404216)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT', [";;    #[test]", 1247, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    #[test]", 1247, 0], _407956)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1247, 0], _407956)
   Call: (271) [apply] apply:maplist_([";;    #[test]", 1247, 0], _407956, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    #[test]", 1247, 0], [_410774|_410776], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    #[test]", _410774)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _410774)
   Call: (273) [system] var(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _410774)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", '$VAR'(_415420))
   Call: (273) [system] atom(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _410774)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _410774)
   Call: (273) [system] ";;    #[test]"==true
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _410774)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _410774)
   Call: (273) [system] ";;    #[test]"==false
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _410774)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _410774)
   Call: (273) [system] ";;    #[test]"==[_424700, _424706]
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _410774)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _410774)
   Call: (273) [system] is_list(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _410774)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _410774)
   Call: (273) [system] string(";;    #[test]")
   Exit: (273) [system] string(";;    #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _410774)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _410774)
   Call: (273) [system] compound(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _410774)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _410774)
^  Call: (273) [user] symbol(";;    #[test]")
^  Unify: (273) [user] symbol(";;    #[test]")
   Call: (274) [system] atom(";;    #[test]")
   Fail: (274) [system] atom(";;    #[test]")
^  Fail: (273) [user] symbol(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _410774)
   Call: (273) [system] ";;    #[test]"=_410774
   Exit: (273) [system] ";;    #[test]"=";;    #[test]"
^  Exit: (272) [user] mfix_vars1(";;    #[test]", ";;    #[test]")
   Call: (272) [apply] apply:maplist_([1247, 0], _410776, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1247, 0], [_448772|_448774], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1247, _448772)
^  Unify: (273) [user] mfix_vars1(1247, _448772)
   Call: (274) [system] var(1247)
^  Redo: (273) [user] mfix_vars1(1247, _448772)
^  Unify: (273) [user] mfix_vars1(1247, '$VAR'(_453418))
   Call: (274) [system] atom(1247)
^  Redo: (273) [user] mfix_vars1(1247, _448772)
^  Unify: (273) [user] mfix_vars1(1247, _448772)
   Call: (274) [system] 1247==true
^  Redo: (273) [user] mfix_vars1(1247, _448772)
^  Unify: (273) [user] mfix_vars1(1247, _448772)
   Call: (274) [system] 1247==false
^  Redo: (273) [user] mfix_vars1(1247, _448772)
^  Unify: (273) [user] mfix_vars1(1247, _448772)
   Call: (274) [system] 1247==[_462698, _462704]
^  Redo: (273) [user] mfix_vars1(1247, _448772)
^  Unify: (273) [user] mfix_vars1(1247, _448772)
   Call: (274) [system] is_list(1247)
^  Redo: (273) [user] mfix_vars1(1247, _448772)
^  Unify: (273) [user] mfix_vars1(1247, _448772)
   Call: (274) [system] string(1247)
^  Redo: (273) [user] mfix_vars1(1247, _448772)
^  Unify: (273) [user] mfix_vars1(1247, _448772)
   Call: (274) [system] compound(1247)
^  Redo: (273) [user] mfix_vars1(1247, _448772)
^  Unify: (273) [user] mfix_vars1(1247, _448772)
^  Call: (274) [user] symbol(1247)
^  Unify: (274) [user] symbol(1247)
   Call: (275) [system] atom(1247)
   Fail: (275) [system] atom(1247)
^  Fail: (274) [user] symbol(1247)
^  Redo: (273) [user] mfix_vars1(1247, _448772)
   Call: (274) [system] 1247=_448772
   Exit: (274) [system] 1247=1247
^  Exit: (273) [user] mfix_vars1(1247, 1247)
   Call: (273) [apply] apply:maplist_([0], _448774, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_483098|_483100], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _483098)
^  Unify: (274) [user] mfix_vars1(0, _483098)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _483098)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_487744))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _483098)
^  Unify: (274) [user] mfix_vars1(0, _483098)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _483098)
^  Unify: (274) [user] mfix_vars1(0, _483098)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _483098)
^  Unify: (274) [user] mfix_vars1(0, _483098)
   Call: (275) [system] 0==[_497024, _497030]
^  Redo: (274) [user] mfix_vars1(0, _483098)
^  Unify: (274) [user] mfix_vars1(0, _483098)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _483098)
^  Unify: (274) [user] mfix_vars1(0, _483098)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _483098)
^  Unify: (274) [user] mfix_vars1(0, _483098)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _483098)
^  Unify: (274) [user] mfix_vars1(0, _483098)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _483098)
   Call: (275) [system] 0=_483098
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _483100, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1247, 0], [1247, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    #[test]", 1247, 0], [";;    #[test]", 1247, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1247, 0], [";;    #[test]", 1247, 0])
   Call: (270) [system] compound_name_arguments(_377272, '$COMMENT', [";;    #[test]", 1247, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT', [";;    #[test]", 1247, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1247, 0)\=@='$COMMENT'(";;    #[test]", 1247, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1247, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    #[test]", 1247, 0), _15294))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1247, 0), _15294))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1247, 0), _15294))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1247, 0), _15294))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1247, 0), _15294)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1247, 0), _15294)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    #[test]", 1247, 0), _20880))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1247, 0), _20880))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    #[test]", 1247, 0), _20880)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1247, 0), _20880)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1247, 0), _20880)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1247, 0)\=@='$COMMENT'(";;    #[test]", 1247, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1247, 0), _15294)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    #[test]", 1247, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1247, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1247, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1247, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1247, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1247, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    #[test]", 1247, 0), _43200))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1247, 0), _43200))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    #[test]", 1247, 0), _43200)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1247, 0), _43200)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1247, 0), _43200)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1247, 0)\=@='$COMMENT'(";;    #[test]", 1247, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1247, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0)))
   Call: (261) [system] '$COMMENT'(";;    #[test]", 1247, 0)\=@='$COMMENT'(";;    #[test]", 1247, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1247, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1247, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1247, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1247, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1247, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1247, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1247, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1247, 0), _71978, [], _71980)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    #[test]", 1247, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1247, 0), _71978, [], _71980)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1247, 0), _71978, [], _71980)
   Call: (258) [system] atom('$COMMENT'(";;    #[test]", 1247, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1247, 0), _71978, [], _71980)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1247, 0), _71978, [], _71980)
   Call: (258) [system] compound('$COMMENT'(";;    #[test]", 1247, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    #[test]", 1247, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1247, 0), _81294, _81296)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT', [";;    #[test]", 1247, 0])
^  Call: (258) [user] subst_vars([";;    #[test]", 1247, 0], _83180, [], _71980)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1247, 0], [";;    #[test]", 1247, 0], [], [])
   Call: (259) [system] var([";;    #[test]", 1247, 0])
^  Redo: (258) [user] subst_vars([";;    #[test]", 1247, 0], _83180, [], _71980)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1247, 0], [_86916|_86918], [], _71980)
^  Call: (259) [user] subst_vars(";;    #[test]", _86916, [], _87856)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
   Call: (260) [system] var(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _86916, [], _87856)
^  Unify: (259) [user] subst_vars(";;    #[test]", _86916, [], _87856)
   Call: (260) [system] atom(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _86916, [], _87856)
^  Unify: (259) [user] subst_vars(";;    #[test]", _86916, [], _87856)
   Call: (260) [system] compound(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _86916, [], _87856)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Exit: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Call: (259) [user] subst_vars([1247, 0], _86918, [], _71980)
^  Unify: (259) [user] subst_vars([1247, 0], [1247, 0], [], [])
   Call: (260) [system] var([1247, 0])
^  Redo: (259) [user] subst_vars([1247, 0], _86918, [], _71980)
^  Unify: (259) [user] subst_vars([1247, 0], [_102788|_102790], [], _71980)
^  Call: (260) [user] subst_vars(1247, _102788, [], _103728)
^  Unify: (260) [user] subst_vars(1247, 1247, [], [])
   Call: (261) [system] var(1247)
^  Redo: (260) [user] subst_vars(1247, _102788, [], _103728)
^  Unify: (260) [user] subst_vars(1247, _102788, [], _103728)
   Call: (261) [system] atom(1247)
^  Redo: (260) [user] subst_vars(1247, _102788, [], _103728)
^  Unify: (260) [user] subst_vars(1247, _102788, [], _103728)
   Call: (261) [system] compound(1247)
^  Redo: (260) [user] subst_vars(1247, _102788, [], _103728)
^  Unify: (260) [user] subst_vars(1247, 1247, [], [])
^  Exit: (260) [user] subst_vars(1247, 1247, [], [])
^  Call: (260) [user] subst_vars([0], _102790, [], _71980)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _102790, [], _71980)
^  Unify: (260) [user] subst_vars([0], [_118660|_118662], [], _71980)
^  Call: (261) [user] subst_vars(0, _118660, [], _119600)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _118660, [], _119600)
^  Unify: (261) [user] subst_vars(0, _118660, [], _119600)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _118660, [], _119600)
^  Unify: (261) [user] subst_vars(0, _118660, [], _119600)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _118660, [], _119600)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _118662, [], _71980)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _118662, [], _71980)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1247, 0], [1247, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    #[test]", 1247, 0], [";;    #[test]", 1247, 0], [], [])
   Call: (258) [system] compound_name_arguments(_71978, '$COMMENT', [";;    #[test]", 1247, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT', [";;    #[test]", 1247, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1247, 0), '$COMMENT'(";;    #[test]", 1247, 0), [], [])
   Call: (257) [system] _142018=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1247, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1247, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1247, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1247, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1247, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1247, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1247, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1247, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1247, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1248, 0, 45004, '$COMMENT'(";;    fn println_op() {", 1248, 0), '$stream_position'(45004, 1248, 0, 45004)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn println_op() {", 1248, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn println_op() {", 1248, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    fn println_op() {", 1248, 0), _194740))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn println_op() {", 1248, 0), _194740))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    fn println_op() {", 1248, 0), _194740)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn println_op() {", 1248, 0), _194740)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    fn println_op() {", 1248, 0), _194740)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    fn println_op() {", 1248, 0), _194740)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    fn println_op() {", 1248, 0), _200352))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn println_op() {", 1248, 0), _200352))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn println_op() {", 1248, 0), _200352))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn println_op() {", 1248, 0), _200352))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn println_op() {", 1248, 0), _200352)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn println_op() {", 1248, 0), _200352)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    fn println_op() {", 1248, 0), _205938))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn println_op() {", 1248, 0), _205938))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    fn println_op() {", 1248, 0), _205938)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn println_op() {", 1248, 0), _205938)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    fn println_op() {", 1248, 0), _205938)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn println_op() {", 1248, 0), _205938)
   Call: (270) [system] var('$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn println_op() {", 1248, 0), _205938)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn println_op() {", 1248, 0), '$VAR'(_213398))
   Call: (270) [system] atom('$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn println_op() {", 1248, 0), _205938)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn println_op() {", 1248, 0), _205938)
   Call: (270) [system] '$COMMENT'(";;    fn println_op() {", 1248, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn println_op() {", 1248, 0), _205938)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn println_op() {", 1248, 0), _205938)
   Call: (270) [system] '$COMMENT'(";;    fn println_op() {", 1248, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn println_op() {", 1248, 0), _205938)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn println_op() {", 1248, 0), _205938)
   Call: (270) [system] '$COMMENT'(";;    fn println_op() {", 1248, 0)==[_222678, _222684]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn println_op() {", 1248, 0), _205938)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn println_op() {", 1248, 0), _205938)
   Call: (270) [system] is_list('$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn println_op() {", 1248, 0), _205938)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn println_op() {", 1248, 0), _205938)
   Call: (270) [system] string('$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn println_op() {", 1248, 0), _205938)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn println_op() {", 1248, 0), _205938)
   Call: (270) [system] compound('$COMMENT'(";;    fn println_op() {", 1248, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    fn println_op() {", 1248, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    fn println_op() {", 1248, 0), _232880, _232882)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT', [";;    fn println_op() {", 1248, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    fn println_op() {", 1248, 0], _236622)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn println_op() {", 1248, 0], _236622)
   Call: (271) [apply] apply:maplist_([";;    fn println_op() {", 1248, 0], _236622, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    fn println_op() {", 1248, 0], [_239440|_239442], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    fn println_op() {", _239440)
^  Unify: (272) [user] mfix_vars1(";;    fn println_op() {", _239440)
   Call: (273) [system] var(";;    fn println_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn println_op() {", _239440)
^  Unify: (272) [user] mfix_vars1(";;    fn println_op() {", '$VAR'(_244086))
   Call: (273) [system] atom(";;    fn println_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn println_op() {", _239440)
^  Unify: (272) [user] mfix_vars1(";;    fn println_op() {", _239440)
   Call: (273) [system] ";;    fn println_op() {"==true
^  Redo: (272) [user] mfix_vars1(";;    fn println_op() {", _239440)
^  Unify: (272) [user] mfix_vars1(";;    fn println_op() {", _239440)
   Call: (273) [system] ";;    fn println_op() {"==false
^  Redo: (272) [user] mfix_vars1(";;    fn println_op() {", _239440)
^  Unify: (272) [user] mfix_vars1(";;    fn println_op() {", _239440)
   Call: (273) [system] ";;    fn println_op() {"==[_253366, _253372]
^  Redo: (272) [user] mfix_vars1(";;    fn println_op() {", _239440)
^  Unify: (272) [user] mfix_vars1(";;    fn println_op() {", _239440)
   Call: (273) [system] is_list(";;    fn println_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn println_op() {", _239440)
^  Unify: (272) [user] mfix_vars1(";;    fn println_op() {", _239440)
   Call: (273) [system] string(";;    fn println_op() {")
   Exit: (273) [system] string(";;    fn println_op() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    fn println_op() {", _239440)
^  Unify: (272) [user] mfix_vars1(";;    fn println_op() {", _239440)
   Call: (273) [system] compound(";;    fn println_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn println_op() {", _239440)
^  Unify: (272) [user] mfix_vars1(";;    fn println_op() {", _239440)
^  Call: (273) [user] symbol(";;    fn println_op() {")
^  Unify: (273) [user] symbol(";;    fn println_op() {")
   Call: (274) [system] atom(";;    fn println_op() {")
   Fail: (274) [system] atom(";;    fn println_op() {")
^  Fail: (273) [user] symbol(";;    fn println_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn println_op() {", _239440)
   Call: (273) [system] ";;    fn println_op() {"=_239440
   Exit: (273) [system] ";;    fn println_op() {"=";;    fn println_op() {"
^  Exit: (272) [user] mfix_vars1(";;    fn println_op() {", ";;    fn println_op() {")
   Call: (272) [apply] apply:maplist_([1248, 0], _239442, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1248, 0], [_277438|_277440], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1248, _277438)
^  Unify: (273) [user] mfix_vars1(1248, _277438)
   Call: (274) [system] var(1248)
^  Redo: (273) [user] mfix_vars1(1248, _277438)
^  Unify: (273) [user] mfix_vars1(1248, '$VAR'(_282084))
   Call: (274) [system] atom(1248)
^  Redo: (273) [user] mfix_vars1(1248, _277438)
^  Unify: (273) [user] mfix_vars1(1248, _277438)
   Call: (274) [system] 1248==true
^  Redo: (273) [user] mfix_vars1(1248, _277438)
^  Unify: (273) [user] mfix_vars1(1248, _277438)
   Call: (274) [system] 1248==false
^  Redo: (273) [user] mfix_vars1(1248, _277438)
^  Unify: (273) [user] mfix_vars1(1248, _277438)
   Call: (274) [system] 1248==[_291364, _291370]
^  Redo: (273) [user] mfix_vars1(1248, _277438)
^  Unify: (273) [user] mfix_vars1(1248, _277438)
   Call: (274) [system] is_list(1248)
^  Redo: (273) [user] mfix_vars1(1248, _277438)
^  Unify: (273) [user] mfix_vars1(1248, _277438)
   Call: (274) [system] string(1248)
^  Redo: (273) [user] mfix_vars1(1248, _277438)
^  Unify: (273) [user] mfix_vars1(1248, _277438)
   Call: (274) [system] compound(1248)
^  Redo: (273) [user] mfix_vars1(1248, _277438)
^  Unify: (273) [user] mfix_vars1(1248, _277438)
^  Call: (274) [user] symbol(1248)
^  Unify: (274) [user] symbol(1248)
   Call: (275) [system] atom(1248)
   Fail: (275) [system] atom(1248)
^  Fail: (274) [user] symbol(1248)
^  Redo: (273) [user] mfix_vars1(1248, _277438)
   Call: (274) [system] 1248=_277438
   Exit: (274) [system] 1248=1248
^  Exit: (273) [user] mfix_vars1(1248, 1248)
   Call: (273) [apply] apply:maplist_([0], _277440, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_311764|_311766], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _311764)
^  Unify: (274) [user] mfix_vars1(0, _311764)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _311764)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_316410))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _311764)
^  Unify: (274) [user] mfix_vars1(0, _311764)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _311764)
^  Unify: (274) [user] mfix_vars1(0, _311764)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _311764)
^  Unify: (274) [user] mfix_vars1(0, _311764)
   Call: (275) [system] 0==[_325690, _325696]
^  Redo: (274) [user] mfix_vars1(0, _311764)
^  Unify: (274) [user] mfix_vars1(0, _311764)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _311764)
^  Unify: (274) [user] mfix_vars1(0, _311764)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _311764)
^  Unify: (274) [user] mfix_vars1(0, _311764)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _311764)
^  Unify: (274) [user] mfix_vars1(0, _311764)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _311764)
   Call: (275) [system] 0=_311764
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _311766, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1248, 0], [1248, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    fn println_op() {", 1248, 0], [";;    fn println_op() {", 1248, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn println_op() {", 1248, 0], [";;    fn println_op() {", 1248, 0])
   Call: (270) [system] compound_name_arguments(_205938, '$COMMENT', [";;    fn println_op() {", 1248, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT', [";;    fn println_op() {", 1248, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn println_op() {", 1248, 0)\=@='$COMMENT'(";;    fn println_op() {", 1248, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn println_op() {", 1248, 0), _200352)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    fn println_op() {", 1248, 0), _361938))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn println_op() {", 1248, 0), _361938))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    fn println_op() {", 1248, 0), _361938))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn println_op() {", 1248, 0), _361938))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn println_op() {", 1248, 0), _361938)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn println_op() {", 1248, 0), _361938)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    fn println_op() {", 1248, 0), _367524))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn println_op() {", 1248, 0), _367524))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    fn println_op() {", 1248, 0), _367524)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn println_op() {", 1248, 0), _367524)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    fn println_op() {", 1248, 0), _367524)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn println_op() {", 1248, 0)\=@='$COMMENT'(";;    fn println_op() {", 1248, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn println_op() {", 1248, 0), _361938)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    fn println_op() {", 1248, 0), _194740))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn println_op() {", 1248, 0), _194740))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    fn println_op() {", 1248, 0), _194740))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn println_op() {", 1248, 0), _194740))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn println_op() {", 1248, 0), _194740)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn println_op() {", 1248, 0), _194740)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    fn println_op() {", 1248, 0), _389844))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn println_op() {", 1248, 0), _389844))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    fn println_op() {", 1248, 0), _389844)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn println_op() {", 1248, 0), _389844)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    fn println_op() {", 1248, 0), _389844)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn println_op() {", 1248, 0)\=@='$COMMENT'(";;    fn println_op() {", 1248, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn println_op() {", 1248, 0), _194740)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0)))
   Call: (261) [system] '$COMMENT'(";;    fn println_op() {", 1248, 0)\=@='$COMMENT'(";;    fn println_op() {", 1248, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn println_op() {", 1248, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn println_op() {", 1248, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn println_op() {", 1248, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn println_op() {", 1248, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn println_op() {", 1248, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    fn println_op() {", 1248, 0), _418622, [], _418624)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn println_op() {", 1248, 0), _418622, [], _418624)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn println_op() {", 1248, 0), _418622, [], _418624)
   Call: (258) [system] atom('$COMMENT'(";;    fn println_op() {", 1248, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn println_op() {", 1248, 0), _418622, [], _418624)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn println_op() {", 1248, 0), _418622, [], _418624)
   Call: (258) [system] compound('$COMMENT'(";;    fn println_op() {", 1248, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    fn println_op() {", 1248, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    fn println_op() {", 1248, 0), _427938, _427940)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT', [";;    fn println_op() {", 1248, 0])
^  Call: (258) [user] subst_vars([";;    fn println_op() {", 1248, 0], _429824, [], _418624)
^  Unify: (258) [user] subst_vars([";;    fn println_op() {", 1248, 0], [";;    fn println_op() {", 1248, 0], [], [])
   Call: (259) [system] var([";;    fn println_op() {", 1248, 0])
^  Redo: (258) [user] subst_vars([";;    fn println_op() {", 1248, 0], _429824, [], _418624)
^  Unify: (258) [user] subst_vars([";;    fn println_op() {", 1248, 0], [_433560|_433562], [], _418624)
^  Call: (259) [user] subst_vars(";;    fn println_op() {", _433560, [], _434500)
^  Unify: (259) [user] subst_vars(";;    fn println_op() {", ";;    fn println_op() {", [], [])
   Call: (260) [system] var(";;    fn println_op() {")
^  Redo: (259) [user] subst_vars(";;    fn println_op() {", _433560, [], _434500)
^  Unify: (259) [user] subst_vars(";;    fn println_op() {", _433560, [], _434500)
   Call: (260) [system] atom(";;    fn println_op() {")
^  Redo: (259) [user] subst_vars(";;    fn println_op() {", _433560, [], _434500)
^  Unify: (259) [user] subst_vars(";;    fn println_op() {", _433560, [], _434500)
   Call: (260) [system] compound(";;    fn println_op() {")
^  Redo: (259) [user] subst_vars(";;    fn println_op() {", _433560, [], _434500)
^  Unify: (259) [user] subst_vars(";;    fn println_op() {", ";;    fn println_op() {", [], [])
^  Exit: (259) [user] subst_vars(";;    fn println_op() {", ";;    fn println_op() {", [], [])
^  Call: (259) [user] subst_vars([1248, 0], _433562, [], _418624)
^  Unify: (259) [user] subst_vars([1248, 0], [1248, 0], [], [])
   Call: (260) [system] var([1248, 0])
^  Redo: (259) [user] subst_vars([1248, 0], _433562, [], _418624)
^  Unify: (259) [user] subst_vars([1248, 0], [_449432|_449434], [], _418624)
^  Call: (260) [user] subst_vars(1248, _449432, [], _450372)
^  Unify: (260) [user] subst_vars(1248, 1248, [], [])
   Call: (261) [system] var(1248)
^  Redo: (260) [user] subst_vars(1248, _449432, [], _450372)
^  Unify: (260) [user] subst_vars(1248, _449432, [], _450372)
   Call: (261) [system] atom(1248)
^  Redo: (260) [user] subst_vars(1248, _449432, [], _450372)
^  Unify: (260) [user] subst_vars(1248, _449432, [], _450372)
   Call: (261) [system] compound(1248)
^  Redo: (260) [user] subst_vars(1248, _449432, [], _450372)
^  Unify: (260) [user] subst_vars(1248, 1248, [], [])
^  Exit: (260) [user] subst_vars(1248, 1248, [], [])
^  Call: (260) [user] subst_vars([0], _449434, [], _418624)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _449434, [], _418624)
^  Unify: (260) [user] subst_vars([0], [_465304|_465306], [], _418624)
^  Call: (261) [user] subst_vars(0, _465304, [], _466244)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _465304, [], _466244)
^  Unify: (261) [user] subst_vars(0, _465304, [], _466244)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _465304, [], _466244)
^  Unify: (261) [user] subst_vars(0, _465304, [], _466244)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _465304, [], _466244)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _465306, [], _418624)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _465306, [], _418624)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1248, 0], [1248, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    fn println_op() {", 1248, 0], [";;    fn println_op() {", 1248, 0], [], [])
   Call: (258) [system] compound_name_arguments(_418622, '$COMMENT', [";;    fn println_op() {", 1248, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT', [";;    fn println_op() {", 1248, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    fn println_op() {", 1248, 0), '$COMMENT'(";;    fn println_op() {", 1248, 0), [], [])
   Call: (257) [system] _488662=metta_file_buffer(+, '$COMMENT'(";;    fn println_op() {", 1248, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    fn println_op() {", 1248, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    fn println_op() {", 1248, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn println_op() {", 1248, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn println_op() {", 1248, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn println_op() {", 1248, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn println_op() {", 1248, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn println_op() {", 1248, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn println_op() {", 1248, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1249, 0, 45028, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$stream_position'(45028, 1249, 0, 45028)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _23426))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _23426))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _23426)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _23426)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _23426)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _23426)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _29038))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _29038))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _29038))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _29038))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _29038)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _29038)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _34624))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _34624))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _34624)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _34624)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _34624)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _34624)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _34624)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$VAR'(_42084))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _34624)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _34624)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _34624)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _34624)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _34624)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _34624)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0)==[_51364, _51370]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _34624)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _34624)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _34624)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _34624)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _34624)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _34624)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _61566, _61568)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT', [";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0], _65308)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0], _65308)
   Call: (271) [apply] apply:maplist_([";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0], _65308, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0], [_68126|_68128], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _68126)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _68126)
   Call: (273) [system] var(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _68126)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", '$VAR'(_72772))
   Call: (273) [system] atom(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _68126)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _68126)
   Call: (273) [system] ";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _68126)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _68126)
   Call: (273) [system] ";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _68126)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _68126)
   Call: (273) [system] ";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());"==[_82052, _82058]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _68126)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _68126)
   Call: (273) [system] is_list(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _68126)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _68126)
   Call: (273) [system] string(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());")
   Exit: (273) [system] string(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _68126)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _68126)
   Call: (273) [system] compound(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _68126)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _68126)
^  Call: (273) [user] symbol(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());")
^  Unify: (273) [user] symbol(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());")
   Call: (274) [system] atom(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());")
   Fail: (274) [system] atom(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());")
^  Fail: (273) [user] symbol(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _68126)
   Call: (273) [system] ";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());"=_68126
   Exit: (273) [system] ";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());"=";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", ";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());")
   Call: (272) [apply] apply:maplist_([1249, 0], _68128, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1249, 0], [_106124|_106126], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1249, _106124)
^  Unify: (273) [user] mfix_vars1(1249, _106124)
   Call: (274) [system] var(1249)
^  Redo: (273) [user] mfix_vars1(1249, _106124)
^  Unify: (273) [user] mfix_vars1(1249, '$VAR'(_110770))
   Call: (274) [system] atom(1249)
^  Redo: (273) [user] mfix_vars1(1249, _106124)
^  Unify: (273) [user] mfix_vars1(1249, _106124)
   Call: (274) [system] 1249==true
^  Redo: (273) [user] mfix_vars1(1249, _106124)
^  Unify: (273) [user] mfix_vars1(1249, _106124)
   Call: (274) [system] 1249==false
^  Redo: (273) [user] mfix_vars1(1249, _106124)
^  Unify: (273) [user] mfix_vars1(1249, _106124)
   Call: (274) [system] 1249==[_120050, _120056]
^  Redo: (273) [user] mfix_vars1(1249, _106124)
^  Unify: (273) [user] mfix_vars1(1249, _106124)
   Call: (274) [system] is_list(1249)
^  Redo: (273) [user] mfix_vars1(1249, _106124)
^  Unify: (273) [user] mfix_vars1(1249, _106124)
   Call: (274) [system] string(1249)
^  Redo: (273) [user] mfix_vars1(1249, _106124)
^  Unify: (273) [user] mfix_vars1(1249, _106124)
   Call: (274) [system] compound(1249)
^  Redo: (273) [user] mfix_vars1(1249, _106124)
^  Unify: (273) [user] mfix_vars1(1249, _106124)
^  Call: (274) [user] symbol(1249)
^  Unify: (274) [user] symbol(1249)
   Call: (275) [system] atom(1249)
   Fail: (275) [system] atom(1249)
^  Fail: (274) [user] symbol(1249)
^  Redo: (273) [user] mfix_vars1(1249, _106124)
   Call: (274) [system] 1249=_106124
   Exit: (274) [system] 1249=1249
^  Exit: (273) [user] mfix_vars1(1249, 1249)
   Call: (273) [apply] apply:maplist_([0], _106126, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_140450|_140452], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _140450)
^  Unify: (274) [user] mfix_vars1(0, _140450)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _140450)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_145096))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _140450)
^  Unify: (274) [user] mfix_vars1(0, _140450)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _140450)
^  Unify: (274) [user] mfix_vars1(0, _140450)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _140450)
^  Unify: (274) [user] mfix_vars1(0, _140450)
   Call: (275) [system] 0==[_154376, _154382]
^  Redo: (274) [user] mfix_vars1(0, _140450)
^  Unify: (274) [user] mfix_vars1(0, _140450)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _140450)
^  Unify: (274) [user] mfix_vars1(0, _140450)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _140450)
^  Unify: (274) [user] mfix_vars1(0, _140450)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _140450)
^  Unify: (274) [user] mfix_vars1(0, _140450)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _140450)
   Call: (275) [system] 0=_140450
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _140452, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1249, 0], [1249, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0], [";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0], [";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0])
   Call: (270) [system] compound_name_arguments(_34624, '$COMMENT', [";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT', [";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0)\=@='$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _29038)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _190624))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _190624))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _190624))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _190624))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _190624)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _190624)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _196210))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _196210))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _196210)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _196210)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _196210)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0)\=@='$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _190624)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _23426))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _23426))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _23426))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _23426))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _23426)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _23426)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _218530))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _218530))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _218530)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _218530)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _218530)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0)\=@='$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _23426)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0)\=@='$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _247308, [], _247310)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _247308, [], _247310)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _247308, [], _247310)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _247308, [], _247310)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _247308, [], _247310)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), _256624, _256626)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT', [";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0], _258510, [], _247310)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0], [";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0], [], [])
   Call: (259) [system] var([";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0], _258510, [], _247310)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0], [_262246|_262248], [], _247310)
^  Call: (259) [user] subst_vars(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _262246, [], _263186)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", ";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", [], [])
   Call: (260) [system] var(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _262246, [], _263186)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _262246, [], _263186)
   Call: (260) [system] atom(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _262246, [], _263186)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _262246, [], _263186)
   Call: (260) [system] compound(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", _262246, [], _263186)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", ";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", ";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", [], [])
^  Call: (259) [user] subst_vars([1249, 0], _262248, [], _247310)
^  Unify: (259) [user] subst_vars([1249, 0], [1249, 0], [], [])
   Call: (260) [system] var([1249, 0])
^  Redo: (259) [user] subst_vars([1249, 0], _262248, [], _247310)
^  Unify: (259) [user] subst_vars([1249, 0], [_278118|_278120], [], _247310)
^  Call: (260) [user] subst_vars(1249, _278118, [], _279058)
^  Unify: (260) [user] subst_vars(1249, 1249, [], [])
   Call: (261) [system] var(1249)
^  Redo: (260) [user] subst_vars(1249, _278118, [], _279058)
^  Unify: (260) [user] subst_vars(1249, _278118, [], _279058)
   Call: (261) [system] atom(1249)
^  Redo: (260) [user] subst_vars(1249, _278118, [], _279058)
^  Unify: (260) [user] subst_vars(1249, _278118, [], _279058)
   Call: (261) [system] compound(1249)
^  Redo: (260) [user] subst_vars(1249, _278118, [], _279058)
^  Unify: (260) [user] subst_vars(1249, 1249, [], [])
^  Exit: (260) [user] subst_vars(1249, 1249, [], [])
^  Call: (260) [user] subst_vars([0], _278120, [], _247310)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _278120, [], _247310)
^  Unify: (260) [user] subst_vars([0], [_293990|_293992], [], _247310)
^  Call: (261) [user] subst_vars(0, _293990, [], _294930)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _293990, [], _294930)
^  Unify: (261) [user] subst_vars(0, _293990, [], _294930)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _293990, [], _294930)
^  Unify: (261) [user] subst_vars(0, _293990, [], _294930)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _293990, [], _294930)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _293992, [], _247310)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _293992, [], _247310)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1249, 0], [1249, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0], [";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0], [], [])
   Call: (258) [system] compound_name_arguments(_247308, '$COMMENT', [";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT', [";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), [], [])
   Call: (257) [system] _317348=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(PrintlnOp{}.execute(&mut vec![sym!(\"A\")]), unit_result());", 1249, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1250, 0, 45108, '$COMMENT'(";;    }", 1250, 0), '$stream_position'(45108, 1250, 0, 45108)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1250, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1250, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    }", 1250, 0), _370066))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1250, 0), _370066))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    }", 1250, 0), _370066)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1250, 0), _370066)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1250, 0), _370066)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1250, 0), _370066)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    }", 1250, 0), _375678))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1250, 0), _375678))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1250, 0), _375678))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1250, 0), _375678))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1250, 0), _375678)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1250, 0), _375678)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    }", 1250, 0), _381264))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1250, 0), _381264))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    }", 1250, 0), _381264)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1250, 0), _381264)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1250, 0), _381264)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1250, 0), _381264)
   Call: (270) [system] var('$COMMENT'(";;    }", 1250, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1250, 0), _381264)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1250, 0), '$VAR'(_388724))
   Call: (270) [system] atom('$COMMENT'(";;    }", 1250, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1250, 0), _381264)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1250, 0), _381264)
   Call: (270) [system] '$COMMENT'(";;    }", 1250, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1250, 0), _381264)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1250, 0), _381264)
   Call: (270) [system] '$COMMENT'(";;    }", 1250, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1250, 0), _381264)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1250, 0), _381264)
   Call: (270) [system] '$COMMENT'(";;    }", 1250, 0)==[_398004, _398010]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1250, 0), _381264)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1250, 0), _381264)
   Call: (270) [system] is_list('$COMMENT'(";;    }", 1250, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1250, 0), _381264)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1250, 0), _381264)
   Call: (270) [system] string('$COMMENT'(";;    }", 1250, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1250, 0), _381264)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1250, 0), _381264)
   Call: (270) [system] compound('$COMMENT'(";;    }", 1250, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    }", 1250, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1250, 0), _408206, _408208)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1250, 0), '$COMMENT', [";;    }", 1250, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    }", 1250, 0], _411948)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1250, 0], _411948)
   Call: (271) [apply] apply:maplist_([";;    }", 1250, 0], _411948, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    }", 1250, 0], [_414766|_414768], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    }", _414766)
^  Unify: (272) [user] mfix_vars1(";;    }", _414766)
   Call: (273) [system] var(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _414766)
^  Unify: (272) [user] mfix_vars1(";;    }", '$VAR'(_419412))
   Call: (273) [system] atom(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _414766)
^  Unify: (272) [user] mfix_vars1(";;    }", _414766)
   Call: (273) [system] ";;    }"==true
^  Redo: (272) [user] mfix_vars1(";;    }", _414766)
^  Unify: (272) [user] mfix_vars1(";;    }", _414766)
   Call: (273) [system] ";;    }"==false
^  Redo: (272) [user] mfix_vars1(";;    }", _414766)
^  Unify: (272) [user] mfix_vars1(";;    }", _414766)
   Call: (273) [system] ";;    }"==[_428692, _428698]
^  Redo: (272) [user] mfix_vars1(";;    }", _414766)
^  Unify: (272) [user] mfix_vars1(";;    }", _414766)
   Call: (273) [system] is_list(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _414766)
^  Unify: (272) [user] mfix_vars1(";;    }", _414766)
   Call: (273) [system] string(";;    }")
   Exit: (273) [system] string(";;    }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    }", _414766)
^  Unify: (272) [user] mfix_vars1(";;    }", _414766)
   Call: (273) [system] compound(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _414766)
^  Unify: (272) [user] mfix_vars1(";;    }", _414766)
^  Call: (273) [user] symbol(";;    }")
^  Unify: (273) [user] symbol(";;    }")
   Call: (274) [system] atom(";;    }")
   Fail: (274) [system] atom(";;    }")
^  Fail: (273) [user] symbol(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _414766)
   Call: (273) [system] ";;    }"=_414766
   Exit: (273) [system] ";;    }"=";;    }"
^  Exit: (272) [user] mfix_vars1(";;    }", ";;    }")
   Call: (272) [apply] apply:maplist_([1250, 0], _414768, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1250, 0], [_452764|_452766], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1250, _452764)
^  Unify: (273) [user] mfix_vars1(1250, _452764)
   Call: (274) [system] var(1250)
^  Redo: (273) [user] mfix_vars1(1250, _452764)
^  Unify: (273) [user] mfix_vars1(1250, '$VAR'(_457410))
   Call: (274) [system] atom(1250)
^  Redo: (273) [user] mfix_vars1(1250, _452764)
^  Unify: (273) [user] mfix_vars1(1250, _452764)
   Call: (274) [system] 1250==true
^  Redo: (273) [user] mfix_vars1(1250, _452764)
^  Unify: (273) [user] mfix_vars1(1250, _452764)
   Call: (274) [system] 1250==false
^  Redo: (273) [user] mfix_vars1(1250, _452764)
^  Unify: (273) [user] mfix_vars1(1250, _452764)
   Call: (274) [system] 1250==[_466690, _466696]
^  Redo: (273) [user] mfix_vars1(1250, _452764)
^  Unify: (273) [user] mfix_vars1(1250, _452764)
   Call: (274) [system] is_list(1250)
^  Redo: (273) [user] mfix_vars1(1250, _452764)
^  Unify: (273) [user] mfix_vars1(1250, _452764)
   Call: (274) [system] string(1250)
^  Redo: (273) [user] mfix_vars1(1250, _452764)
^  Unify: (273) [user] mfix_vars1(1250, _452764)
   Call: (274) [system] compound(1250)
^  Redo: (273) [user] mfix_vars1(1250, _452764)
^  Unify: (273) [user] mfix_vars1(1250, _452764)
^  Call: (274) [user] symbol(1250)
^  Unify: (274) [user] symbol(1250)
   Call: (275) [system] atom(1250)
   Fail: (275) [system] atom(1250)
^  Fail: (274) [user] symbol(1250)
^  Redo: (273) [user] mfix_vars1(1250, _452764)
   Call: (274) [system] 1250=_452764
   Exit: (274) [system] 1250=1250
^  Exit: (273) [user] mfix_vars1(1250, 1250)
   Call: (273) [apply] apply:maplist_([0], _452766, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_487090|_487092], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _487090)
^  Unify: (274) [user] mfix_vars1(0, _487090)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _487090)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_491736))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _487090)
^  Unify: (274) [user] mfix_vars1(0, _487090)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _487090)
^  Unify: (274) [user] mfix_vars1(0, _487090)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _487090)
^  Unify: (274) [user] mfix_vars1(0, _487090)
   Call: (275) [system] 0==[_501016, _501022]
^  Redo: (274) [user] mfix_vars1(0, _487090)
^  Unify: (274) [user] mfix_vars1(0, _487090)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _487090)
^  Unify: (274) [user] mfix_vars1(0, _487090)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _487090)
^  Unify: (274) [user] mfix_vars1(0, _487090)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _487090)
^  Unify: (274) [user] mfix_vars1(0, _487090)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _487090)
   Call: (275) [system] 0=_487090
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _487092, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1250, 0], [1250, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    }", 1250, 0], [";;    }", 1250, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1250, 0], [";;    }", 1250, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";;    }", 1250, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1250, 0), '$COMMENT', [";;    }", 1250, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1250, 0)\=@='$COMMENT'(";;    }", 1250, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1250, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    }", 1250, 0), _19454))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1250, 0), _19454))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1250, 0), _19454))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1250, 0), _19454))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1250, 0), _19454)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1250, 0), _19454)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    }", 1250, 0), _25040))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1250, 0), _25040))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    }", 1250, 0), _25040)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1250, 0), _25040)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    }", 1250, 0), _25040)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1250, 0)\=@='$COMMENT'(";;    }", 1250, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1250, 0), _19454)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    }", 1250, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1250, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1250, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1250, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1250, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1250, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    }", 1250, 0), _47360))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1250, 0), _47360))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    }", 1250, 0), _47360)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1250, 0), _47360)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    }", 1250, 0), _47360)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1250, 0)\=@='$COMMENT'(";;    }", 1250, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1250, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0)))
   Call: (261) [system] '$COMMENT'(";;    }", 1250, 0)\=@='$COMMENT'(";;    }", 1250, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1250, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1250, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1250, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1250, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1250, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    }", 1250, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    }", 1250, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    }", 1250, 0), _76138, [], _76140)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    }", 1250, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1250, 0), _76138, [], _76140)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1250, 0), _76138, [], _76140)
   Call: (258) [system] atom('$COMMENT'(";;    }", 1250, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1250, 0), _76138, [], _76140)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1250, 0), _76138, [], _76140)
   Call: (258) [system] compound('$COMMENT'(";;    }", 1250, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    }", 1250, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1250, 0), _85454, _85456)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1250, 0), '$COMMENT', [";;    }", 1250, 0])
^  Call: (258) [user] subst_vars([";;    }", 1250, 0], _87340, [], _76140)
^  Unify: (258) [user] subst_vars([";;    }", 1250, 0], [";;    }", 1250, 0], [], [])
   Call: (259) [system] var([";;    }", 1250, 0])
^  Redo: (258) [user] subst_vars([";;    }", 1250, 0], _87340, [], _76140)
^  Unify: (258) [user] subst_vars([";;    }", 1250, 0], [_91076|_91078], [], _76140)
^  Call: (259) [user] subst_vars(";;    }", _91076, [], _92016)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
   Call: (260) [system] var(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _91076, [], _92016)
^  Unify: (259) [user] subst_vars(";;    }", _91076, [], _92016)
   Call: (260) [system] atom(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _91076, [], _92016)
^  Unify: (259) [user] subst_vars(";;    }", _91076, [], _92016)
   Call: (260) [system] compound(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _91076, [], _92016)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Exit: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Call: (259) [user] subst_vars([1250, 0], _91078, [], _76140)
^  Unify: (259) [user] subst_vars([1250, 0], [1250, 0], [], [])
   Call: (260) [system] var([1250, 0])
^  Redo: (259) [user] subst_vars([1250, 0], _91078, [], _76140)
^  Unify: (259) [user] subst_vars([1250, 0], [_106948|_106950], [], _76140)
^  Call: (260) [user] subst_vars(1250, _106948, [], _107888)
^  Unify: (260) [user] subst_vars(1250, 1250, [], [])
   Call: (261) [system] var(1250)
^  Redo: (260) [user] subst_vars(1250, _106948, [], _107888)
^  Unify: (260) [user] subst_vars(1250, _106948, [], _107888)
   Call: (261) [system] atom(1250)
^  Redo: (260) [user] subst_vars(1250, _106948, [], _107888)
^  Unify: (260) [user] subst_vars(1250, _106948, [], _107888)
   Call: (261) [system] compound(1250)
^  Redo: (260) [user] subst_vars(1250, _106948, [], _107888)
^  Unify: (260) [user] subst_vars(1250, 1250, [], [])
^  Exit: (260) [user] subst_vars(1250, 1250, [], [])
^  Call: (260) [user] subst_vars([0], _106950, [], _76140)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _106950, [], _76140)
^  Unify: (260) [user] subst_vars([0], [_122820|_122822], [], _76140)
^  Call: (261) [user] subst_vars(0, _122820, [], _123760)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _122820, [], _123760)
^  Unify: (261) [user] subst_vars(0, _122820, [], _123760)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _122820, [], _123760)
^  Unify: (261) [user] subst_vars(0, _122820, [], _123760)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _122820, [], _123760)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _122822, [], _76140)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _122822, [], _76140)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1250, 0], [1250, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    }", 1250, 0], [";;    }", 1250, 0], [], [])
   Call: (258) [system] compound_name_arguments(_76138, '$COMMENT', [";;    }", 1250, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1250, 0), '$COMMENT', [";;    }", 1250, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    }", 1250, 0), '$COMMENT'(";;    }", 1250, 0), [], [])
   Call: (257) [system] _146178=metta_file_buffer(+, '$COMMENT'(";;    }", 1250, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    }", 1250, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    }", 1250, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1250, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1250, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1250, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1250, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1250, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1250, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1251, 0, 45116, '$COMMENT'(";; Converted:", 1251, 0), '$stream_position'(45116, 1251, 0, 45116)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1251, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1251, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1251, 0), _198896))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1251, 0), _198896))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1251, 0), _198896)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1251, 0), _198896)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1251, 0), _198896)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1251, 0), _198896)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1251, 0), _204508))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1251, 0), _204508))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1251, 0), _204508))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1251, 0), _204508))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1251, 0), _204508)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1251, 0), _204508)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1251, 0), _210094))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1251, 0), _210094))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1251, 0), _210094)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1251, 0), _210094)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1251, 0), _210094)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1251, 0), _210094)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1251, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1251, 0), _210094)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1251, 0), '$VAR'(_217554))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1251, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1251, 0), _210094)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1251, 0), _210094)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1251, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1251, 0), _210094)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1251, 0), _210094)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1251, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1251, 0), _210094)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1251, 0), _210094)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1251, 0)==[_226834, _226840]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1251, 0), _210094)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1251, 0), _210094)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1251, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1251, 0), _210094)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1251, 0), _210094)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1251, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1251, 0), _210094)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1251, 0), _210094)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1251, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1251, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1251, 0), _237036, _237038)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1251, 0), '$COMMENT', [";; Converted:", 1251, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1251, 0], _240778)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1251, 0], _240778)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1251, 0], _240778, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1251, 0], [_243596|_243598], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _243596)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _243596)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _243596)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_248242))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _243596)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _243596)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _243596)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _243596)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _243596)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _243596)
   Call: (273) [system] ";; Converted:"==[_257522, _257528]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _243596)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _243596)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _243596)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _243596)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _243596)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _243596)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _243596)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _243596)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _243596)
   Call: (273) [system] ";; Converted:"=_243596
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1251, 0], _243598, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1251, 0], [_281594|_281596], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1251, _281594)
^  Unify: (273) [user] mfix_vars1(1251, _281594)
   Call: (274) [system] var(1251)
^  Redo: (273) [user] mfix_vars1(1251, _281594)
^  Unify: (273) [user] mfix_vars1(1251, '$VAR'(_286240))
   Call: (274) [system] atom(1251)
^  Redo: (273) [user] mfix_vars1(1251, _281594)
^  Unify: (273) [user] mfix_vars1(1251, _281594)
   Call: (274) [system] 1251==true
^  Redo: (273) [user] mfix_vars1(1251, _281594)
^  Unify: (273) [user] mfix_vars1(1251, _281594)
   Call: (274) [system] 1251==false
^  Redo: (273) [user] mfix_vars1(1251, _281594)
^  Unify: (273) [user] mfix_vars1(1251, _281594)
   Call: (274) [system] 1251==[_295520, _295526]
^  Redo: (273) [user] mfix_vars1(1251, _281594)
^  Unify: (273) [user] mfix_vars1(1251, _281594)
   Call: (274) [system] is_list(1251)
^  Redo: (273) [user] mfix_vars1(1251, _281594)
^  Unify: (273) [user] mfix_vars1(1251, _281594)
   Call: (274) [system] string(1251)
^  Redo: (273) [user] mfix_vars1(1251, _281594)
^  Unify: (273) [user] mfix_vars1(1251, _281594)
   Call: (274) [system] compound(1251)
^  Redo: (273) [user] mfix_vars1(1251, _281594)
^  Unify: (273) [user] mfix_vars1(1251, _281594)
^  Call: (274) [user] symbol(1251)
^  Unify: (274) [user] symbol(1251)
   Call: (275) [system] atom(1251)
   Fail: (275) [system] atom(1251)
^  Fail: (274) [user] symbol(1251)
^  Redo: (273) [user] mfix_vars1(1251, _281594)
   Call: (274) [system] 1251=_281594
   Exit: (274) [system] 1251=1251
^  Exit: (273) [user] mfix_vars1(1251, 1251)
   Call: (273) [apply] apply:maplist_([0], _281596, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_315920|_315922], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _315920)
^  Unify: (274) [user] mfix_vars1(0, _315920)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _315920)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_320566))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _315920)
^  Unify: (274) [user] mfix_vars1(0, _315920)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _315920)
^  Unify: (274) [user] mfix_vars1(0, _315920)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _315920)
^  Unify: (274) [user] mfix_vars1(0, _315920)
   Call: (275) [system] 0==[_329846, _329852]
^  Redo: (274) [user] mfix_vars1(0, _315920)
^  Unify: (274) [user] mfix_vars1(0, _315920)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _315920)
^  Unify: (274) [user] mfix_vars1(0, _315920)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _315920)
^  Unify: (274) [user] mfix_vars1(0, _315920)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _315920)
^  Unify: (274) [user] mfix_vars1(0, _315920)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _315920)
   Call: (275) [system] 0=_315920
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _315922, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1251, 0], [1251, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1251, 0], [";; Converted:", 1251, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1251, 0], [";; Converted:", 1251, 0])
   Call: (270) [system] compound_name_arguments(_210094, '$COMMENT', [";; Converted:", 1251, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1251, 0), '$COMMENT', [";; Converted:", 1251, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1251, 0)\=@='$COMMENT'(";; Converted:", 1251, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1251, 0), _204508)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1251, 0), _366094))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1251, 0), _366094))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1251, 0), _366094))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1251, 0), _366094))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1251, 0), _366094)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1251, 0), _366094)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1251, 0), _371680))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1251, 0), _371680))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1251, 0), _371680)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1251, 0), _371680)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1251, 0), _371680)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1251, 0)\=@='$COMMENT'(";; Converted:", 1251, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1251, 0), _366094)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1251, 0), _198896))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1251, 0), _198896))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1251, 0), _198896))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1251, 0), _198896))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1251, 0), _198896)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1251, 0), _198896)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1251, 0), _394000))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1251, 0), _394000))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1251, 0), _394000)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1251, 0), _394000)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1251, 0), _394000)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1251, 0)\=@='$COMMENT'(";; Converted:", 1251, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1251, 0), _198896)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1251, 0)\=@='$COMMENT'(";; Converted:", 1251, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1251, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1251, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1251, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1251, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1251, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1251, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1251, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1251, 0), _422778, [], _422780)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1251, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1251, 0), _422778, [], _422780)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1251, 0), _422778, [], _422780)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1251, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1251, 0), _422778, [], _422780)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1251, 0), _422778, [], _422780)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1251, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1251, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1251, 0), _432094, _432096)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1251, 0), '$COMMENT', [";; Converted:", 1251, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1251, 0], _433980, [], _422780)
^  Unify: (258) [user] subst_vars([";; Converted:", 1251, 0], [";; Converted:", 1251, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1251, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1251, 0], _433980, [], _422780)
^  Unify: (258) [user] subst_vars([";; Converted:", 1251, 0], [_437716|_437718], [], _422780)
^  Call: (259) [user] subst_vars(";; Converted:", _437716, [], _438656)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _437716, [], _438656)
^  Unify: (259) [user] subst_vars(";; Converted:", _437716, [], _438656)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _437716, [], _438656)
^  Unify: (259) [user] subst_vars(";; Converted:", _437716, [], _438656)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _437716, [], _438656)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1251, 0], _437718, [], _422780)
^  Unify: (259) [user] subst_vars([1251, 0], [1251, 0], [], [])
   Call: (260) [system] var([1251, 0])
^  Redo: (259) [user] subst_vars([1251, 0], _437718, [], _422780)
^  Unify: (259) [user] subst_vars([1251, 0], [_453588|_453590], [], _422780)
^  Call: (260) [user] subst_vars(1251, _453588, [], _454528)
^  Unify: (260) [user] subst_vars(1251, 1251, [], [])
   Call: (261) [system] var(1251)
^  Redo: (260) [user] subst_vars(1251, _453588, [], _454528)
^  Unify: (260) [user] subst_vars(1251, _453588, [], _454528)
   Call: (261) [system] atom(1251)
^  Redo: (260) [user] subst_vars(1251, _453588, [], _454528)
^  Unify: (260) [user] subst_vars(1251, _453588, [], _454528)
   Call: (261) [system] compound(1251)
^  Redo: (260) [user] subst_vars(1251, _453588, [], _454528)
^  Unify: (260) [user] subst_vars(1251, 1251, [], [])
^  Exit: (260) [user] subst_vars(1251, 1251, [], [])
^  Call: (260) [user] subst_vars([0], _453590, [], _422780)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _453590, [], _422780)
^  Unify: (260) [user] subst_vars([0], [_469460|_469462], [], _422780)
^  Call: (261) [user] subst_vars(0, _469460, [], _470400)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _469460, [], _470400)
^  Unify: (261) [user] subst_vars(0, _469460, [], _470400)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _469460, [], _470400)
^  Unify: (261) [user] subst_vars(0, _469460, [], _470400)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _469460, [], _470400)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _469462, [], _422780)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _469462, [], _422780)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1251, 0], [1251, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1251, 0], [";; Converted:", 1251, 0], [], [])
   Call: (258) [system] compound_name_arguments(_422778, '$COMMENT', [";; Converted:", 1251, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1251, 0), '$COMMENT', [";; Converted:", 1251, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1251, 0), '$COMMENT'(";; Converted:", 1251, 0), [], [])
   Call: (257) [system] _492818=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1251, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1251, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1251, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1251, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1251, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1251, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1251, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1251, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1251, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1254, 0, 45164, '$COMMENT'(";; Original: ", 1254, 0), '$stream_position'(45164, 1254, 0, 45164)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original: ", 1254, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original: ", 1254, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original: ", 1254, 0), _28508))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original: ", 1254, 0), _28508))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original: ", 1254, 0), _28508)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original: ", 1254, 0), _28508)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original: ", 1254, 0), _28508)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original: ", 1254, 0), _28508)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original: ", 1254, 0), _34120))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original: ", 1254, 0), _34120))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original: ", 1254, 0), _34120))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original: ", 1254, 0), _34120))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original: ", 1254, 0), _34120)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original: ", 1254, 0), _34120)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original: ", 1254, 0), _39706))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original: ", 1254, 0), _39706))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original: ", 1254, 0), _39706)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original: ", 1254, 0), _39706)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1254, 0), _39706)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1254, 0), _39706)
   Call: (270) [system] var('$COMMENT'(";; Original: ", 1254, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1254, 0), _39706)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1254, 0), '$VAR'(_47166))
   Call: (270) [system] atom('$COMMENT'(";; Original: ", 1254, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1254, 0), _39706)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1254, 0), _39706)
   Call: (270) [system] '$COMMENT'(";; Original: ", 1254, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1254, 0), _39706)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1254, 0), _39706)
   Call: (270) [system] '$COMMENT'(";; Original: ", 1254, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1254, 0), _39706)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1254, 0), _39706)
   Call: (270) [system] '$COMMENT'(";; Original: ", 1254, 0)==[_56446, _56452]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1254, 0), _39706)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1254, 0), _39706)
   Call: (270) [system] is_list('$COMMENT'(";; Original: ", 1254, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1254, 0), _39706)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1254, 0), _39706)
   Call: (270) [system] string('$COMMENT'(";; Original: ", 1254, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1254, 0), _39706)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1254, 0), _39706)
   Call: (270) [system] compound('$COMMENT'(";; Original: ", 1254, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original: ", 1254, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original: ", 1254, 0), _66648, _66650)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original: ", 1254, 0), '$COMMENT', [";; Original: ", 1254, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original: ", 1254, 0], _70390)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original: ", 1254, 0], _70390)
   Call: (271) [apply] apply:maplist_([";; Original: ", 1254, 0], _70390, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original: ", 1254, 0], [_73208|_73210], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original: ", _73208)
^  Unify: (272) [user] mfix_vars1(";; Original: ", _73208)
   Call: (273) [system] var(";; Original: ")
^  Redo: (272) [user] mfix_vars1(";; Original: ", _73208)
^  Unify: (272) [user] mfix_vars1(";; Original: ", '$VAR'(_77854))
   Call: (273) [system] atom(";; Original: ")
^  Redo: (272) [user] mfix_vars1(";; Original: ", _73208)
^  Unify: (272) [user] mfix_vars1(";; Original: ", _73208)
   Call: (273) [system] ";; Original: "==true
^  Redo: (272) [user] mfix_vars1(";; Original: ", _73208)
^  Unify: (272) [user] mfix_vars1(";; Original: ", _73208)
   Call: (273) [system] ";; Original: "==false
^  Redo: (272) [user] mfix_vars1(";; Original: ", _73208)
^  Unify: (272) [user] mfix_vars1(";; Original: ", _73208)
   Call: (273) [system] ";; Original: "==[_87134, _87140]
^  Redo: (272) [user] mfix_vars1(";; Original: ", _73208)
^  Unify: (272) [user] mfix_vars1(";; Original: ", _73208)
   Call: (273) [system] is_list(";; Original: ")
^  Redo: (272) [user] mfix_vars1(";; Original: ", _73208)
^  Unify: (272) [user] mfix_vars1(";; Original: ", _73208)
   Call: (273) [system] string(";; Original: ")
   Exit: (273) [system] string(";; Original: ")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original: ", _73208)
^  Unify: (272) [user] mfix_vars1(";; Original: ", _73208)
   Call: (273) [system] compound(";; Original: ")
^  Redo: (272) [user] mfix_vars1(";; Original: ", _73208)
^  Unify: (272) [user] mfix_vars1(";; Original: ", _73208)
^  Call: (273) [user] symbol(";; Original: ")
^  Unify: (273) [user] symbol(";; Original: ")
   Call: (274) [system] atom(";; Original: ")
   Fail: (274) [system] atom(";; Original: ")
^  Fail: (273) [user] symbol(";; Original: ")
^  Redo: (272) [user] mfix_vars1(";; Original: ", _73208)
   Call: (273) [system] ";; Original: "=_73208
   Exit: (273) [system] ";; Original: "=";; Original: "
^  Exit: (272) [user] mfix_vars1(";; Original: ", ";; Original: ")
   Call: (272) [apply] apply:maplist_([1254, 0], _73210, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1254, 0], [_111206|_111208], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1254, _111206)
^  Unify: (273) [user] mfix_vars1(1254, _111206)
   Call: (274) [system] var(1254)
^  Redo: (273) [user] mfix_vars1(1254, _111206)
^  Unify: (273) [user] mfix_vars1(1254, '$VAR'(_115852))
   Call: (274) [system] atom(1254)
^  Redo: (273) [user] mfix_vars1(1254, _111206)
^  Unify: (273) [user] mfix_vars1(1254, _111206)
   Call: (274) [system] 1254==true
^  Redo: (273) [user] mfix_vars1(1254, _111206)
^  Unify: (273) [user] mfix_vars1(1254, _111206)
   Call: (274) [system] 1254==false
^  Redo: (273) [user] mfix_vars1(1254, _111206)
^  Unify: (273) [user] mfix_vars1(1254, _111206)
   Call: (274) [system] 1254==[_125132, _125138]
^  Redo: (273) [user] mfix_vars1(1254, _111206)
^  Unify: (273) [user] mfix_vars1(1254, _111206)
   Call: (274) [system] is_list(1254)
^  Redo: (273) [user] mfix_vars1(1254, _111206)
^  Unify: (273) [user] mfix_vars1(1254, _111206)
   Call: (274) [system] string(1254)
^  Redo: (273) [user] mfix_vars1(1254, _111206)
^  Unify: (273) [user] mfix_vars1(1254, _111206)
   Call: (274) [system] compound(1254)
^  Redo: (273) [user] mfix_vars1(1254, _111206)
^  Unify: (273) [user] mfix_vars1(1254, _111206)
^  Call: (274) [user] symbol(1254)
^  Unify: (274) [user] symbol(1254)
   Call: (275) [system] atom(1254)
   Fail: (275) [system] atom(1254)
^  Fail: (274) [user] symbol(1254)
^  Redo: (273) [user] mfix_vars1(1254, _111206)
   Call: (274) [system] 1254=_111206
   Exit: (274) [system] 1254=1254
^  Exit: (273) [user] mfix_vars1(1254, 1254)
   Call: (273) [apply] apply:maplist_([0], _111208, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_145532|_145534], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _145532)
^  Unify: (274) [user] mfix_vars1(0, _145532)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _145532)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_150178))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _145532)
^  Unify: (274) [user] mfix_vars1(0, _145532)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _145532)
^  Unify: (274) [user] mfix_vars1(0, _145532)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _145532)
^  Unify: (274) [user] mfix_vars1(0, _145532)
   Call: (275) [system] 0==[_159458, _159464]
^  Redo: (274) [user] mfix_vars1(0, _145532)
^  Unify: (274) [user] mfix_vars1(0, _145532)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _145532)
^  Unify: (274) [user] mfix_vars1(0, _145532)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _145532)
^  Unify: (274) [user] mfix_vars1(0, _145532)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _145532)
^  Unify: (274) [user] mfix_vars1(0, _145532)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _145532)
   Call: (275) [system] 0=_145532
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _145534, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1254, 0], [1254, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original: ", 1254, 0], [";; Original: ", 1254, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original: ", 1254, 0], [";; Original: ", 1254, 0])
   Call: (270) [system] compound_name_arguments(_39706, '$COMMENT', [";; Original: ", 1254, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original: ", 1254, 0), '$COMMENT', [";; Original: ", 1254, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0)))
   Call: (267) [system] '$COMMENT'(";; Original: ", 1254, 0)\=@='$COMMENT'(";; Original: ", 1254, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original: ", 1254, 0), _34120)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original: ", 1254, 0), _195706))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original: ", 1254, 0), _195706))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original: ", 1254, 0), _195706))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original: ", 1254, 0), _195706))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original: ", 1254, 0), _195706)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original: ", 1254, 0), _195706)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original: ", 1254, 0), _201292))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original: ", 1254, 0), _201292))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original: ", 1254, 0), _201292)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original: ", 1254, 0), _201292)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original: ", 1254, 0), _201292)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0)))
   Call: (267) [system] '$COMMENT'(";; Original: ", 1254, 0)\=@='$COMMENT'(";; Original: ", 1254, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original: ", 1254, 0), _195706)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original: ", 1254, 0), _28508))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original: ", 1254, 0), _28508))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original: ", 1254, 0), _28508))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original: ", 1254, 0), _28508))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original: ", 1254, 0), _28508)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original: ", 1254, 0), _28508)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original: ", 1254, 0), _223612))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original: ", 1254, 0), _223612))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original: ", 1254, 0), _223612)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original: ", 1254, 0), _223612)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original: ", 1254, 0), _223612)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0)))
   Call: (267) [system] '$COMMENT'(";; Original: ", 1254, 0)\=@='$COMMENT'(";; Original: ", 1254, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original: ", 1254, 0), _28508)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0)))
   Call: (261) [system] '$COMMENT'(";; Original: ", 1254, 0)\=@='$COMMENT'(";; Original: ", 1254, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original: ", 1254, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original: ", 1254, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original: ", 1254, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original: ", 1254, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original: ", 1254, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original: ", 1254, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original: ", 1254, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original: ", 1254, 0), _252390, [], _252392)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original: ", 1254, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original: ", 1254, 0), _252390, [], _252392)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original: ", 1254, 0), _252390, [], _252392)
   Call: (258) [system] atom('$COMMENT'(";; Original: ", 1254, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original: ", 1254, 0), _252390, [], _252392)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original: ", 1254, 0), _252390, [], _252392)
   Call: (258) [system] compound('$COMMENT'(";; Original: ", 1254, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original: ", 1254, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original: ", 1254, 0), _261706, _261708)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original: ", 1254, 0), '$COMMENT', [";; Original: ", 1254, 0])
^  Call: (258) [user] subst_vars([";; Original: ", 1254, 0], _263592, [], _252392)
^  Unify: (258) [user] subst_vars([";; Original: ", 1254, 0], [";; Original: ", 1254, 0], [], [])
   Call: (259) [system] var([";; Original: ", 1254, 0])
^  Redo: (258) [user] subst_vars([";; Original: ", 1254, 0], _263592, [], _252392)
^  Unify: (258) [user] subst_vars([";; Original: ", 1254, 0], [_267328|_267330], [], _252392)
^  Call: (259) [user] subst_vars(";; Original: ", _267328, [], _268268)
^  Unify: (259) [user] subst_vars(";; Original: ", ";; Original: ", [], [])
   Call: (260) [system] var(";; Original: ")
^  Redo: (259) [user] subst_vars(";; Original: ", _267328, [], _268268)
^  Unify: (259) [user] subst_vars(";; Original: ", _267328, [], _268268)
   Call: (260) [system] atom(";; Original: ")
^  Redo: (259) [user] subst_vars(";; Original: ", _267328, [], _268268)
^  Unify: (259) [user] subst_vars(";; Original: ", _267328, [], _268268)
   Call: (260) [system] compound(";; Original: ")
^  Redo: (259) [user] subst_vars(";; Original: ", _267328, [], _268268)
^  Unify: (259) [user] subst_vars(";; Original: ", ";; Original: ", [], [])
^  Exit: (259) [user] subst_vars(";; Original: ", ";; Original: ", [], [])
^  Call: (259) [user] subst_vars([1254, 0], _267330, [], _252392)
^  Unify: (259) [user] subst_vars([1254, 0], [1254, 0], [], [])
   Call: (260) [system] var([1254, 0])
^  Redo: (259) [user] subst_vars([1254, 0], _267330, [], _252392)
^  Unify: (259) [user] subst_vars([1254, 0], [_283200|_283202], [], _252392)
^  Call: (260) [user] subst_vars(1254, _283200, [], _284140)
^  Unify: (260) [user] subst_vars(1254, 1254, [], [])
   Call: (261) [system] var(1254)
^  Redo: (260) [user] subst_vars(1254, _283200, [], _284140)
^  Unify: (260) [user] subst_vars(1254, _283200, [], _284140)
   Call: (261) [system] atom(1254)
^  Redo: (260) [user] subst_vars(1254, _283200, [], _284140)
^  Unify: (260) [user] subst_vars(1254, _283200, [], _284140)
   Call: (261) [system] compound(1254)
^  Redo: (260) [user] subst_vars(1254, _283200, [], _284140)
^  Unify: (260) [user] subst_vars(1254, 1254, [], [])
^  Exit: (260) [user] subst_vars(1254, 1254, [], [])
^  Call: (260) [user] subst_vars([0], _283202, [], _252392)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _283202, [], _252392)
^  Unify: (260) [user] subst_vars([0], [_299072|_299074], [], _252392)
^  Call: (261) [user] subst_vars(0, _299072, [], _300012)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _299072, [], _300012)
^  Unify: (261) [user] subst_vars(0, _299072, [], _300012)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _299072, [], _300012)
^  Unify: (261) [user] subst_vars(0, _299072, [], _300012)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _299072, [], _300012)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _299074, [], _252392)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _299074, [], _252392)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1254, 0], [1254, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original: ", 1254, 0], [";; Original: ", 1254, 0], [], [])
   Call: (258) [system] compound_name_arguments(_252390, '$COMMENT', [";; Original: ", 1254, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original: ", 1254, 0), '$COMMENT', [";; Original: ", 1254, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original: ", 1254, 0), '$COMMENT'(";; Original: ", 1254, 0), [], [])
   Call: (257) [system] _322430=metta_file_buffer(+, '$COMMENT'(";; Original: ", 1254, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original: ", 1254, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original: ", 1254, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original: ", 1254, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original: ", 1254, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original: ", 1254, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original: ", 1254, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original: ", 1254, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original: ", 1254, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1255, 0, 45178, '$COMMENT'(";;    #[test]", 1255, 0), '$stream_position'(45178, 1255, 0, 45178)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1255, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1255, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1255, 0), _375148))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1255, 0), _375148))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1255, 0), _375148)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1255, 0), _375148)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1255, 0), _375148)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1255, 0), _375148)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1255, 0), _380760))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1255, 0), _380760))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1255, 0), _380760))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1255, 0), _380760))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1255, 0), _380760)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1255, 0), _380760)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    #[test]", 1255, 0), _386346))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1255, 0), _386346))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    #[test]", 1255, 0), _386346)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1255, 0), _386346)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1255, 0), _386346)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1255, 0), _386346)
   Call: (270) [system] var('$COMMENT'(";;    #[test]", 1255, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1255, 0), _386346)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1255, 0), '$VAR'(_393806))
   Call: (270) [system] atom('$COMMENT'(";;    #[test]", 1255, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1255, 0), _386346)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1255, 0), _386346)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1255, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1255, 0), _386346)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1255, 0), _386346)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1255, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1255, 0), _386346)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1255, 0), _386346)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1255, 0)==[_403086, _403092]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1255, 0), _386346)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1255, 0), _386346)
   Call: (270) [system] is_list('$COMMENT'(";;    #[test]", 1255, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1255, 0), _386346)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1255, 0), _386346)
   Call: (270) [system] string('$COMMENT'(";;    #[test]", 1255, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1255, 0), _386346)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1255, 0), _386346)
   Call: (270) [system] compound('$COMMENT'(";;    #[test]", 1255, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    #[test]", 1255, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1255, 0), _413288, _413290)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT', [";;    #[test]", 1255, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    #[test]", 1255, 0], _417030)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1255, 0], _417030)
   Call: (271) [apply] apply:maplist_([";;    #[test]", 1255, 0], _417030, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    #[test]", 1255, 0], [_419848|_419850], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    #[test]", _419848)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _419848)
   Call: (273) [system] var(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _419848)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", '$VAR'(_424494))
   Call: (273) [system] atom(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _419848)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _419848)
   Call: (273) [system] ";;    #[test]"==true
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _419848)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _419848)
   Call: (273) [system] ";;    #[test]"==false
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _419848)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _419848)
   Call: (273) [system] ";;    #[test]"==[_433774, _433780]
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _419848)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _419848)
   Call: (273) [system] is_list(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _419848)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _419848)
   Call: (273) [system] string(";;    #[test]")
   Exit: (273) [system] string(";;    #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _419848)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _419848)
   Call: (273) [system] compound(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _419848)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _419848)
^  Call: (273) [user] symbol(";;    #[test]")
^  Unify: (273) [user] symbol(";;    #[test]")
   Call: (274) [system] atom(";;    #[test]")
   Fail: (274) [system] atom(";;    #[test]")
^  Fail: (273) [user] symbol(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _419848)
   Call: (273) [system] ";;    #[test]"=_419848
   Exit: (273) [system] ";;    #[test]"=";;    #[test]"
^  Exit: (272) [user] mfix_vars1(";;    #[test]", ";;    #[test]")
   Call: (272) [apply] apply:maplist_([1255, 0], _419850, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1255, 0], [_457846|_457848], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1255, _457846)
^  Unify: (273) [user] mfix_vars1(1255, _457846)
   Call: (274) [system] var(1255)
^  Redo: (273) [user] mfix_vars1(1255, _457846)
^  Unify: (273) [user] mfix_vars1(1255, '$VAR'(_462492))
   Call: (274) [system] atom(1255)
^  Redo: (273) [user] mfix_vars1(1255, _457846)
^  Unify: (273) [user] mfix_vars1(1255, _457846)
   Call: (274) [system] 1255==true
^  Redo: (273) [user] mfix_vars1(1255, _457846)
^  Unify: (273) [user] mfix_vars1(1255, _457846)
   Call: (274) [system] 1255==false
^  Redo: (273) [user] mfix_vars1(1255, _457846)
^  Unify: (273) [user] mfix_vars1(1255, _457846)
   Call: (274) [system] 1255==[_471772, _471778]
^  Redo: (273) [user] mfix_vars1(1255, _457846)
^  Unify: (273) [user] mfix_vars1(1255, _457846)
   Call: (274) [system] is_list(1255)
^  Redo: (273) [user] mfix_vars1(1255, _457846)
^  Unify: (273) [user] mfix_vars1(1255, _457846)
   Call: (274) [system] string(1255)
^  Redo: (273) [user] mfix_vars1(1255, _457846)
^  Unify: (273) [user] mfix_vars1(1255, _457846)
   Call: (274) [system] compound(1255)
^  Redo: (273) [user] mfix_vars1(1255, _457846)
^  Unify: (273) [user] mfix_vars1(1255, _457846)
^  Call: (274) [user] symbol(1255)
^  Unify: (274) [user] symbol(1255)
   Call: (275) [system] atom(1255)
   Fail: (275) [system] atom(1255)
^  Fail: (274) [user] symbol(1255)
^  Redo: (273) [user] mfix_vars1(1255, _457846)
   Call: (274) [system] 1255=_457846
   Exit: (274) [system] 1255=1255
^  Exit: (273) [user] mfix_vars1(1255, 1255)
   Call: (273) [apply] apply:maplist_([0], _457848, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_492172|_492174], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _492172)
^  Unify: (274) [user] mfix_vars1(0, _492172)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _492172)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_496818))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _492172)
^  Unify: (274) [user] mfix_vars1(0, _492172)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _492172)
^  Unify: (274) [user] mfix_vars1(0, _492172)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _492172)
^  Unify: (274) [user] mfix_vars1(0, _492172)
   Call: (275) [system] 0==[_506098, _506104]
^  Redo: (274) [user] mfix_vars1(0, _492172)
^  Unify: (274) [user] mfix_vars1(0, _492172)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _492172)
^  Unify: (274) [user] mfix_vars1(0, _492172)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _492172)
^  Unify: (274) [user] mfix_vars1(0, _492172)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _492172)
^  Unify: (274) [user] mfix_vars1(0, _492172)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _492172)
   Call: (275) [system] 0=_492172
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6038, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1255, 0], [1255, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    #[test]", 1255, 0], [";;    #[test]", 1255, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1255, 0], [";;    #[test]", 1255, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";;    #[test]", 1255, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT', [";;    #[test]", 1255, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1255, 0)\=@='$COMMENT'(";;    #[test]", 1255, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1255, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    #[test]", 1255, 0), _24458))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1255, 0), _24458))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1255, 0), _24458))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1255, 0), _24458))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1255, 0), _24458)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1255, 0), _24458)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    #[test]", 1255, 0), _30044))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1255, 0), _30044))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    #[test]", 1255, 0), _30044)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1255, 0), _30044)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1255, 0), _30044)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1255, 0)\=@='$COMMENT'(";;    #[test]", 1255, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1255, 0), _24458)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    #[test]", 1255, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1255, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1255, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1255, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1255, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1255, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    #[test]", 1255, 0), _52364))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1255, 0), _52364))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    #[test]", 1255, 0), _52364)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1255, 0), _52364)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1255, 0), _52364)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1255, 0)\=@='$COMMENT'(";;    #[test]", 1255, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1255, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0)))
   Call: (261) [system] '$COMMENT'(";;    #[test]", 1255, 0)\=@='$COMMENT'(";;    #[test]", 1255, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1255, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1255, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1255, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1255, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1255, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1255, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1255, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1255, 0), _81142, [], _81144)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    #[test]", 1255, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1255, 0), _81142, [], _81144)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1255, 0), _81142, [], _81144)
   Call: (258) [system] atom('$COMMENT'(";;    #[test]", 1255, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1255, 0), _81142, [], _81144)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1255, 0), _81142, [], _81144)
   Call: (258) [system] compound('$COMMENT'(";;    #[test]", 1255, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    #[test]", 1255, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1255, 0), _90458, _90460)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT', [";;    #[test]", 1255, 0])
^  Call: (258) [user] subst_vars([";;    #[test]", 1255, 0], _92344, [], _81144)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1255, 0], [";;    #[test]", 1255, 0], [], [])
   Call: (259) [system] var([";;    #[test]", 1255, 0])
^  Redo: (258) [user] subst_vars([";;    #[test]", 1255, 0], _92344, [], _81144)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1255, 0], [_96080|_96082], [], _81144)
^  Call: (259) [user] subst_vars(";;    #[test]", _96080, [], _97020)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
   Call: (260) [system] var(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _96080, [], _97020)
^  Unify: (259) [user] subst_vars(";;    #[test]", _96080, [], _97020)
   Call: (260) [system] atom(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _96080, [], _97020)
^  Unify: (259) [user] subst_vars(";;    #[test]", _96080, [], _97020)
   Call: (260) [system] compound(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _96080, [], _97020)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Exit: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Call: (259) [user] subst_vars([1255, 0], _96082, [], _81144)
^  Unify: (259) [user] subst_vars([1255, 0], [1255, 0], [], [])
   Call: (260) [system] var([1255, 0])
^  Redo: (259) [user] subst_vars([1255, 0], _96082, [], _81144)
^  Unify: (259) [user] subst_vars([1255, 0], [_111952|_111954], [], _81144)
^  Call: (260) [user] subst_vars(1255, _111952, [], _112892)
^  Unify: (260) [user] subst_vars(1255, 1255, [], [])
   Call: (261) [system] var(1255)
^  Redo: (260) [user] subst_vars(1255, _111952, [], _112892)
^  Unify: (260) [user] subst_vars(1255, _111952, [], _112892)
   Call: (261) [system] atom(1255)
^  Redo: (260) [user] subst_vars(1255, _111952, [], _112892)
^  Unify: (260) [user] subst_vars(1255, _111952, [], _112892)
   Call: (261) [system] compound(1255)
^  Redo: (260) [user] subst_vars(1255, _111952, [], _112892)
^  Unify: (260) [user] subst_vars(1255, 1255, [], [])
^  Exit: (260) [user] subst_vars(1255, 1255, [], [])
^  Call: (260) [user] subst_vars([0], _111954, [], _81144)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _111954, [], _81144)
^  Unify: (260) [user] subst_vars([0], [_127824|_127826], [], _81144)
^  Call: (261) [user] subst_vars(0, _127824, [], _128764)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _127824, [], _128764)
^  Unify: (261) [user] subst_vars(0, _127824, [], _128764)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _127824, [], _128764)
^  Unify: (261) [user] subst_vars(0, _127824, [], _128764)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _127824, [], _128764)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _127826, [], _81144)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _127826, [], _81144)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1255, 0], [1255, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    #[test]", 1255, 0], [";;    #[test]", 1255, 0], [], [])
   Call: (258) [system] compound_name_arguments(_81142, '$COMMENT', [";;    #[test]", 1255, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT', [";;    #[test]", 1255, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1255, 0), '$COMMENT'(";;    #[test]", 1255, 0), [], [])
   Call: (257) [system] _151182=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1255, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1255, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1255, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1255, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1255, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1255, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1255, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1255, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1255, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1256, 0, 45192, '$COMMENT'(";;    fn trace_op() {", 1256, 0), '$stream_position'(45192, 1256, 0, 45192)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _203902))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _203902))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _203902)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _203902)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    fn trace_op() {", 1256, 0), _203902)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    fn trace_op() {", 1256, 0), _203902)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _209514))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _209514))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _209514))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _209514))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _209514)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _209514)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _215100))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _215100))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _215100)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _215100)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    fn trace_op() {", 1256, 0), _215100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn trace_op() {", 1256, 0), _215100)
   Call: (270) [system] var('$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn trace_op() {", 1256, 0), _215100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn trace_op() {", 1256, 0), '$VAR'(_222560))
   Call: (270) [system] atom('$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn trace_op() {", 1256, 0), _215100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn trace_op() {", 1256, 0), _215100)
   Call: (270) [system] '$COMMENT'(";;    fn trace_op() {", 1256, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn trace_op() {", 1256, 0), _215100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn trace_op() {", 1256, 0), _215100)
   Call: (270) [system] '$COMMENT'(";;    fn trace_op() {", 1256, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn trace_op() {", 1256, 0), _215100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn trace_op() {", 1256, 0), _215100)
   Call: (270) [system] '$COMMENT'(";;    fn trace_op() {", 1256, 0)==[_231840, _231846]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn trace_op() {", 1256, 0), _215100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn trace_op() {", 1256, 0), _215100)
   Call: (270) [system] is_list('$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn trace_op() {", 1256, 0), _215100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn trace_op() {", 1256, 0), _215100)
   Call: (270) [system] string('$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn trace_op() {", 1256, 0), _215100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn trace_op() {", 1256, 0), _215100)
   Call: (270) [system] compound('$COMMENT'(";;    fn trace_op() {", 1256, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    fn trace_op() {", 1256, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    fn trace_op() {", 1256, 0), _242042, _242044)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT', [";;    fn trace_op() {", 1256, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    fn trace_op() {", 1256, 0], _245784)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn trace_op() {", 1256, 0], _245784)
   Call: (271) [apply] apply:maplist_([";;    fn trace_op() {", 1256, 0], _245784, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    fn trace_op() {", 1256, 0], [_248602|_248604], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    fn trace_op() {", _248602)
^  Unify: (272) [user] mfix_vars1(";;    fn trace_op() {", _248602)
   Call: (273) [system] var(";;    fn trace_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn trace_op() {", _248602)
^  Unify: (272) [user] mfix_vars1(";;    fn trace_op() {", '$VAR'(_253248))
   Call: (273) [system] atom(";;    fn trace_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn trace_op() {", _248602)
^  Unify: (272) [user] mfix_vars1(";;    fn trace_op() {", _248602)
   Call: (273) [system] ";;    fn trace_op() {"==true
^  Redo: (272) [user] mfix_vars1(";;    fn trace_op() {", _248602)
^  Unify: (272) [user] mfix_vars1(";;    fn trace_op() {", _248602)
   Call: (273) [system] ";;    fn trace_op() {"==false
^  Redo: (272) [user] mfix_vars1(";;    fn trace_op() {", _248602)
^  Unify: (272) [user] mfix_vars1(";;    fn trace_op() {", _248602)
   Call: (273) [system] ";;    fn trace_op() {"==[_262528, _262534]
^  Redo: (272) [user] mfix_vars1(";;    fn trace_op() {", _248602)
^  Unify: (272) [user] mfix_vars1(";;    fn trace_op() {", _248602)
   Call: (273) [system] is_list(";;    fn trace_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn trace_op() {", _248602)
^  Unify: (272) [user] mfix_vars1(";;    fn trace_op() {", _248602)
   Call: (273) [system] string(";;    fn trace_op() {")
   Exit: (273) [system] string(";;    fn trace_op() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    fn trace_op() {", _248602)
^  Unify: (272) [user] mfix_vars1(";;    fn trace_op() {", _248602)
   Call: (273) [system] compound(";;    fn trace_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn trace_op() {", _248602)
^  Unify: (272) [user] mfix_vars1(";;    fn trace_op() {", _248602)
^  Call: (273) [user] symbol(";;    fn trace_op() {")
^  Unify: (273) [user] symbol(";;    fn trace_op() {")
   Call: (274) [system] atom(";;    fn trace_op() {")
   Fail: (274) [system] atom(";;    fn trace_op() {")
^  Fail: (273) [user] symbol(";;    fn trace_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn trace_op() {", _248602)
   Call: (273) [system] ";;    fn trace_op() {"=_248602
   Exit: (273) [system] ";;    fn trace_op() {"=";;    fn trace_op() {"
^  Exit: (272) [user] mfix_vars1(";;    fn trace_op() {", ";;    fn trace_op() {")
   Call: (272) [apply] apply:maplist_([1256, 0], _248604, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1256, 0], [_286600|_286602], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1256, _286600)
^  Unify: (273) [user] mfix_vars1(1256, _286600)
   Call: (274) [system] var(1256)
^  Redo: (273) [user] mfix_vars1(1256, _286600)
^  Unify: (273) [user] mfix_vars1(1256, '$VAR'(_291246))
   Call: (274) [system] atom(1256)
^  Redo: (273) [user] mfix_vars1(1256, _286600)
^  Unify: (273) [user] mfix_vars1(1256, _286600)
   Call: (274) [system] 1256==true
^  Redo: (273) [user] mfix_vars1(1256, _286600)
^  Unify: (273) [user] mfix_vars1(1256, _286600)
   Call: (274) [system] 1256==false
^  Redo: (273) [user] mfix_vars1(1256, _286600)
^  Unify: (273) [user] mfix_vars1(1256, _286600)
   Call: (274) [system] 1256==[_300526, _300532]
^  Redo: (273) [user] mfix_vars1(1256, _286600)
^  Unify: (273) [user] mfix_vars1(1256, _286600)
   Call: (274) [system] is_list(1256)
^  Redo: (273) [user] mfix_vars1(1256, _286600)
^  Unify: (273) [user] mfix_vars1(1256, _286600)
   Call: (274) [system] string(1256)
^  Redo: (273) [user] mfix_vars1(1256, _286600)
^  Unify: (273) [user] mfix_vars1(1256, _286600)
   Call: (274) [system] compound(1256)
^  Redo: (273) [user] mfix_vars1(1256, _286600)
^  Unify: (273) [user] mfix_vars1(1256, _286600)
^  Call: (274) [user] symbol(1256)
^  Unify: (274) [user] symbol(1256)
   Call: (275) [system] atom(1256)
   Fail: (275) [system] atom(1256)
^  Fail: (274) [user] symbol(1256)
^  Redo: (273) [user] mfix_vars1(1256, _286600)
   Call: (274) [system] 1256=_286600
   Exit: (274) [system] 1256=1256
^  Exit: (273) [user] mfix_vars1(1256, 1256)
   Call: (273) [apply] apply:maplist_([0], _286602, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_320926|_320928], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _320926)
^  Unify: (274) [user] mfix_vars1(0, _320926)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _320926)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_325572))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _320926)
^  Unify: (274) [user] mfix_vars1(0, _320926)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _320926)
^  Unify: (274) [user] mfix_vars1(0, _320926)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _320926)
^  Unify: (274) [user] mfix_vars1(0, _320926)
   Call: (275) [system] 0==[_334852, _334858]
^  Redo: (274) [user] mfix_vars1(0, _320926)
^  Unify: (274) [user] mfix_vars1(0, _320926)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _320926)
^  Unify: (274) [user] mfix_vars1(0, _320926)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _320926)
^  Unify: (274) [user] mfix_vars1(0, _320926)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _320926)
^  Unify: (274) [user] mfix_vars1(0, _320926)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _320926)
   Call: (275) [system] 0=_320926
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _320928, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1256, 0], [1256, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    fn trace_op() {", 1256, 0], [";;    fn trace_op() {", 1256, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn trace_op() {", 1256, 0], [";;    fn trace_op() {", 1256, 0])
   Call: (270) [system] compound_name_arguments(_215100, '$COMMENT', [";;    fn trace_op() {", 1256, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT', [";;    fn trace_op() {", 1256, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn trace_op() {", 1256, 0)\=@='$COMMENT'(";;    fn trace_op() {", 1256, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _209514)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _371100))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _371100))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _371100))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _371100))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _371100)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _371100)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _376686))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _376686))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _376686)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _376686)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    fn trace_op() {", 1256, 0), _376686)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn trace_op() {", 1256, 0)\=@='$COMMENT'(";;    fn trace_op() {", 1256, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _371100)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _203902))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _203902))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _203902))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _203902))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _203902)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _203902)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _399006))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _399006))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _399006)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _399006)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    fn trace_op() {", 1256, 0), _399006)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn trace_op() {", 1256, 0)\=@='$COMMENT'(";;    fn trace_op() {", 1256, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _203902)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0)))
   Call: (261) [system] '$COMMENT'(";;    fn trace_op() {", 1256, 0)\=@='$COMMENT'(";;    fn trace_op() {", 1256, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn trace_op() {", 1256, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    fn trace_op() {", 1256, 0), _427784, [], _427786)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn trace_op() {", 1256, 0), _427784, [], _427786)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn trace_op() {", 1256, 0), _427784, [], _427786)
   Call: (258) [system] atom('$COMMENT'(";;    fn trace_op() {", 1256, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn trace_op() {", 1256, 0), _427784, [], _427786)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn trace_op() {", 1256, 0), _427784, [], _427786)
   Call: (258) [system] compound('$COMMENT'(";;    fn trace_op() {", 1256, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    fn trace_op() {", 1256, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    fn trace_op() {", 1256, 0), _437100, _437102)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT', [";;    fn trace_op() {", 1256, 0])
^  Call: (258) [user] subst_vars([";;    fn trace_op() {", 1256, 0], _438986, [], _427786)
^  Unify: (258) [user] subst_vars([";;    fn trace_op() {", 1256, 0], [";;    fn trace_op() {", 1256, 0], [], [])
   Call: (259) [system] var([";;    fn trace_op() {", 1256, 0])
^  Redo: (258) [user] subst_vars([";;    fn trace_op() {", 1256, 0], _438986, [], _427786)
^  Unify: (258) [user] subst_vars([";;    fn trace_op() {", 1256, 0], [_442722|_442724], [], _427786)
^  Call: (259) [user] subst_vars(";;    fn trace_op() {", _442722, [], _443662)
^  Unify: (259) [user] subst_vars(";;    fn trace_op() {", ";;    fn trace_op() {", [], [])
   Call: (260) [system] var(";;    fn trace_op() {")
^  Redo: (259) [user] subst_vars(";;    fn trace_op() {", _442722, [], _443662)
^  Unify: (259) [user] subst_vars(";;    fn trace_op() {", _442722, [], _443662)
   Call: (260) [system] atom(";;    fn trace_op() {")
^  Redo: (259) [user] subst_vars(";;    fn trace_op() {", _442722, [], _443662)
^  Unify: (259) [user] subst_vars(";;    fn trace_op() {", _442722, [], _443662)
   Call: (260) [system] compound(";;    fn trace_op() {")
^  Redo: (259) [user] subst_vars(";;    fn trace_op() {", _442722, [], _443662)
^  Unify: (259) [user] subst_vars(";;    fn trace_op() {", ";;    fn trace_op() {", [], [])
^  Exit: (259) [user] subst_vars(";;    fn trace_op() {", ";;    fn trace_op() {", [], [])
^  Call: (259) [user] subst_vars([1256, 0], _442724, [], _427786)
^  Unify: (259) [user] subst_vars([1256, 0], [1256, 0], [], [])
   Call: (260) [system] var([1256, 0])
^  Redo: (259) [user] subst_vars([1256, 0], _442724, [], _427786)
^  Unify: (259) [user] subst_vars([1256, 0], [_458594|_458596], [], _427786)
^  Call: (260) [user] subst_vars(1256, _458594, [], _459534)
^  Unify: (260) [user] subst_vars(1256, 1256, [], [])
   Call: (261) [system] var(1256)
^  Redo: (260) [user] subst_vars(1256, _458594, [], _459534)
^  Unify: (260) [user] subst_vars(1256, _458594, [], _459534)
   Call: (261) [system] atom(1256)
^  Redo: (260) [user] subst_vars(1256, _458594, [], _459534)
^  Unify: (260) [user] subst_vars(1256, _458594, [], _459534)
   Call: (261) [system] compound(1256)
^  Redo: (260) [user] subst_vars(1256, _458594, [], _459534)
^  Unify: (260) [user] subst_vars(1256, 1256, [], [])
^  Exit: (260) [user] subst_vars(1256, 1256, [], [])
^  Call: (260) [user] subst_vars([0], _458596, [], _427786)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _458596, [], _427786)
^  Unify: (260) [user] subst_vars([0], [_474466|_474468], [], _427786)
^  Call: (261) [user] subst_vars(0, _474466, [], _475406)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _474466, [], _475406)
^  Unify: (261) [user] subst_vars(0, _474466, [], _475406)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _474466, [], _475406)
^  Unify: (261) [user] subst_vars(0, _474466, [], _475406)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _474466, [], _475406)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _474468, [], _427786)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _474468, [], _427786)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1256, 0], [1256, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    fn trace_op() {", 1256, 0], [";;    fn trace_op() {", 1256, 0], [], [])
   Call: (258) [system] compound_name_arguments(_427784, '$COMMENT', [";;    fn trace_op() {", 1256, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT', [";;    fn trace_op() {", 1256, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    fn trace_op() {", 1256, 0), '$COMMENT'(";;    fn trace_op() {", 1256, 0), [], [])
   Call: (257) [system] _497824=metta_file_buffer(+, '$COMMENT'(";;    fn trace_op() {", 1256, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    fn trace_op() {", 1256, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    fn trace_op() {", 1256, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn trace_op() {", 1256, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn trace_op() {", 1256, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn trace_op() {", 1256, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn trace_op() {", 1256, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn trace_op() {", 1256, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn trace_op() {", 1256, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1257, 0, 45214, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$stream_position'(45214, 1257, 0, 45214)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _33534))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _33534))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _33534)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _33534)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _33534)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _33534)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _39146))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _39146))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _39146))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _39146))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _39146)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _39146)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _44732))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _44732))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _44732)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _44732)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _44732)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _44732)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _44732)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$VAR'(_52192))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _44732)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _44732)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _44732)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _44732)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _44732)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _44732)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0)==[_61472, _61478]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _44732)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _44732)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _44732)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _44732)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _44732)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _44732)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _71674, _71676)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT', [";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0], _75416)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0], _75416)
   Call: (271) [apply] apply:maplist_([";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0], _75416, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0], [_78234|_78236], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _78234)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _78234)
   Call: (273) [system] var(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _78234)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", '$VAR'(_82880))
   Call: (273) [system] atom(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _78234)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _78234)
   Call: (273) [system] ";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _78234)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _78234)
   Call: (273) [system] ";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _78234)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _78234)
   Call: (273) [system] ";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),"==[_92160, _92166]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _78234)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _78234)
   Call: (273) [system] is_list(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _78234)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _78234)
   Call: (273) [system] string(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),")
   Exit: (273) [system] string(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _78234)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _78234)
   Call: (273) [system] compound(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _78234)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _78234)
^  Call: (273) [user] symbol(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),")
^  Unify: (273) [user] symbol(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),")
   Call: (274) [system] atom(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),")
   Fail: (274) [system] atom(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),")
^  Fail: (273) [user] symbol(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _78234)
   Call: (273) [system] ";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),"=_78234
   Exit: (273) [system] ";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),"=";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", ";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),")
   Call: (272) [apply] apply:maplist_([1257, 0], _78236, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1257, 0], [_116232|_116234], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1257, _116232)
^  Unify: (273) [user] mfix_vars1(1257, _116232)
   Call: (274) [system] var(1257)
^  Redo: (273) [user] mfix_vars1(1257, _116232)
^  Unify: (273) [user] mfix_vars1(1257, '$VAR'(_120878))
   Call: (274) [system] atom(1257)
^  Redo: (273) [user] mfix_vars1(1257, _116232)
^  Unify: (273) [user] mfix_vars1(1257, _116232)
   Call: (274) [system] 1257==true
^  Redo: (273) [user] mfix_vars1(1257, _116232)
^  Unify: (273) [user] mfix_vars1(1257, _116232)
   Call: (274) [system] 1257==false
^  Redo: (273) [user] mfix_vars1(1257, _116232)
^  Unify: (273) [user] mfix_vars1(1257, _116232)
   Call: (274) [system] 1257==[_130158, _130164]
^  Redo: (273) [user] mfix_vars1(1257, _116232)
^  Unify: (273) [user] mfix_vars1(1257, _116232)
   Call: (274) [system] is_list(1257)
^  Redo: (273) [user] mfix_vars1(1257, _116232)
^  Unify: (273) [user] mfix_vars1(1257, _116232)
   Call: (274) [system] string(1257)
^  Redo: (273) [user] mfix_vars1(1257, _116232)
^  Unify: (273) [user] mfix_vars1(1257, _116232)
   Call: (274) [system] compound(1257)
^  Redo: (273) [user] mfix_vars1(1257, _116232)
^  Unify: (273) [user] mfix_vars1(1257, _116232)
^  Call: (274) [user] symbol(1257)
^  Unify: (274) [user] symbol(1257)
   Call: (275) [system] atom(1257)
   Fail: (275) [system] atom(1257)
^  Fail: (274) [user] symbol(1257)
^  Redo: (273) [user] mfix_vars1(1257, _116232)
   Call: (274) [system] 1257=_116232
   Exit: (274) [system] 1257=1257
^  Exit: (273) [user] mfix_vars1(1257, 1257)
   Call: (273) [apply] apply:maplist_([0], _116234, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_150558|_150560], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _150558)
^  Unify: (274) [user] mfix_vars1(0, _150558)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _150558)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_155204))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _150558)
^  Unify: (274) [user] mfix_vars1(0, _150558)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _150558)
^  Unify: (274) [user] mfix_vars1(0, _150558)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _150558)
^  Unify: (274) [user] mfix_vars1(0, _150558)
   Call: (275) [system] 0==[_164484, _164490]
^  Redo: (274) [user] mfix_vars1(0, _150558)
^  Unify: (274) [user] mfix_vars1(0, _150558)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _150558)
^  Unify: (274) [user] mfix_vars1(0, _150558)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _150558)
^  Unify: (274) [user] mfix_vars1(0, _150558)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _150558)
^  Unify: (274) [user] mfix_vars1(0, _150558)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _150558)
   Call: (275) [system] 0=_150558
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _150560, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1257, 0], [1257, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0], [";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0], [";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0])
   Call: (270) [system] compound_name_arguments(_44732, '$COMMENT', [";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT', [";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0)\=@='$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _39146)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _200732))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _200732))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _200732))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _200732))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _200732)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _200732)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _206318))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _206318))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _206318)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _206318)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _206318)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0)\=@='$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _200732)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _33534))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _33534))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _33534))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _33534))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _33534)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _33534)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _228638))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _228638))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _228638)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _228638)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _228638)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0)\=@='$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _33534)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0)\=@='$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _257416, [], _257418)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _257416, [], _257418)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _257416, [], _257418)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _257416, [], _257418)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _257416, [], _257418)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), _266732, _266734)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT', [";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0], _268618, [], _257418)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0], [";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0], [], [])
   Call: (259) [system] var([";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0], _268618, [], _257418)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0], [_272354|_272356], [], _257418)
^  Call: (259) [user] subst_vars(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _272354, [], _273294)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", ";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", [], [])
   Call: (260) [system] var(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _272354, [], _273294)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _272354, [], _273294)
   Call: (260) [system] atom(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _272354, [], _273294)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _272354, [], _273294)
   Call: (260) [system] compound(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", _272354, [], _273294)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", ";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", ";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", [], [])
^  Call: (259) [user] subst_vars([1257, 0], _272356, [], _257418)
^  Unify: (259) [user] subst_vars([1257, 0], [1257, 0], [], [])
   Call: (260) [system] var([1257, 0])
^  Redo: (259) [user] subst_vars([1257, 0], _272356, [], _257418)
^  Unify: (259) [user] subst_vars([1257, 0], [_288226|_288228], [], _257418)
^  Call: (260) [user] subst_vars(1257, _288226, [], _289166)
^  Unify: (260) [user] subst_vars(1257, 1257, [], [])
   Call: (261) [system] var(1257)
^  Redo: (260) [user] subst_vars(1257, _288226, [], _289166)
^  Unify: (260) [user] subst_vars(1257, _288226, [], _289166)
   Call: (261) [system] atom(1257)
^  Redo: (260) [user] subst_vars(1257, _288226, [], _289166)
^  Unify: (260) [user] subst_vars(1257, _288226, [], _289166)
   Call: (261) [system] compound(1257)
^  Redo: (260) [user] subst_vars(1257, _288226, [], _289166)
^  Unify: (260) [user] subst_vars(1257, 1257, [], [])
^  Exit: (260) [user] subst_vars(1257, 1257, [], [])
^  Call: (260) [user] subst_vars([0], _288228, [], _257418)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _288228, [], _257418)
^  Unify: (260) [user] subst_vars([0], [_304098|_304100], [], _257418)
^  Call: (261) [user] subst_vars(0, _304098, [], _305038)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _304098, [], _305038)
^  Unify: (261) [user] subst_vars(0, _304098, [], _305038)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _304098, [], _305038)
^  Unify: (261) [user] subst_vars(0, _304098, [], _305038)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _304098, [], _305038)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _304100, [], _257418)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _304100, [], _257418)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1257, 0], [1257, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0], [";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0], [], [])
   Call: (258) [system] compound_name_arguments(_257416, '$COMMENT', [";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT', [";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), [], [])
   Call: (257) [system] _327456=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(TraceOp{}.execute(&mut vec![sym!(\"\\\"Here?\\\"\"), sym!(\"42\")]),", 1257, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1258, 0, 45296, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$stream_position'(45296, 1258, 0, 45296)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _380182))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _380182))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _380182)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _380182)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _380182)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _380182)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _385794))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _385794))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _385794))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _385794))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _385794)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _385794)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _391380))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _391380))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _391380)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _391380)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _391380)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _391380)
   Call: (270) [system] var('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _391380)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$VAR'(_398840))
   Call: (270) [system] atom('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _391380)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _391380)
   Call: (270) [system] '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _391380)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _391380)
   Call: (270) [system] '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _391380)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _391380)
   Call: (270) [system] '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0)==[_408120, _408126]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _391380)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _391380)
   Call: (270) [system] is_list('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _391380)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _391380)
   Call: (270) [system] string('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _391380)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _391380)
   Call: (270) [system] compound('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
   Exit: (270) [system] compound('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _418322, _418324)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT', [";;                   Ok(vec![sym!(\"42\")]));", 1258, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;                   Ok(vec![sym!(\"42\")]));", 1258, 0], _422064)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;                   Ok(vec![sym!(\"42\")]));", 1258, 0], _422064)
   Call: (271) [apply] apply:maplist_([";;                   Ok(vec![sym!(\"42\")]));", 1258, 0], _422064, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;                   Ok(vec![sym!(\"42\")]));", 1258, 0], [_424882|_424884], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;                   Ok(vec![sym!(\"42\")]));", _424882)
^  Unify: (272) [user] mfix_vars1(";;                   Ok(vec![sym!(\"42\")]));", _424882)
   Call: (273) [system] var(";;                   Ok(vec![sym!(\"42\")]));")
^  Redo: (272) [user] mfix_vars1(";;                   Ok(vec![sym!(\"42\")]));", _424882)
^  Unify: (272) [user] mfix_vars1(";;                   Ok(vec![sym!(\"42\")]));", '$VAR'(_429528))
   Call: (273) [system] atom(";;                   Ok(vec![sym!(\"42\")]));")
^  Redo: (272) [user] mfix_vars1(";;                   Ok(vec![sym!(\"42\")]));", _424882)
^  Unify: (272) [user] mfix_vars1(";;                   Ok(vec![sym!(\"42\")]));", _424882)
   Call: (273) [system] ";;                   Ok(vec![sym!(\"42\")]));"==true
^  Redo: (272) [user] mfix_vars1(";;                   Ok(vec![sym!(\"42\")]));", _424882)
^  Unify: (272) [user] mfix_vars1(";;                   Ok(vec![sym!(\"42\")]));", _424882)
   Call: (273) [system] ";;                   Ok(vec![sym!(\"42\")]));"==false
^  Redo: (272) [user] mfix_vars1(";;                   Ok(vec![sym!(\"42\")]));", _424882)
^  Unify: (272) [user] mfix_vars1(";;                   Ok(vec![sym!(\"42\")]));", _424882)
   Call: (273) [system] ";;                   Ok(vec![sym!(\"42\")]));"==[_438808, _438814]
^  Redo: (272) [user] mfix_vars1(";;                   Ok(vec![sym!(\"42\")]));", _424882)
^  Unify: (272) [user] mfix_vars1(";;                   Ok(vec![sym!(\"42\")]));", _424882)
   Call: (273) [system] is_list(";;                   Ok(vec![sym!(\"42\")]));")
^  Redo: (272) [user] mfix_vars1(";;                   Ok(vec![sym!(\"42\")]));", _424882)
^  Unify: (272) [user] mfix_vars1(";;                   Ok(vec![sym!(\"42\")]));", _424882)
   Call: (273) [system] string(";;                   Ok(vec![sym!(\"42\")]));")
   Exit: (273) [system] string(";;                   Ok(vec![sym!(\"42\")]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;                   Ok(vec![sym!(\"42\")]));", _424882)
^  Unify: (272) [user] mfix_vars1(";;                   Ok(vec![sym!(\"42\")]));", _424882)
   Call: (273) [system] compound(";;                   Ok(vec![sym!(\"42\")]));")
^  Redo: (272) [user] mfix_vars1(";;                   Ok(vec![sym!(\"42\")]));", _424882)
^  Unify: (272) [user] mfix_vars1(";;                   Ok(vec![sym!(\"42\")]));", _424882)
^  Call: (273) [user] symbol(";;                   Ok(vec![sym!(\"42\")]));")
^  Unify: (273) [user] symbol(";;                   Ok(vec![sym!(\"42\")]));")
   Call: (274) [system] atom(";;                   Ok(vec![sym!(\"42\")]));")
   Fail: (274) [system] atom(";;                   Ok(vec![sym!(\"42\")]));")
^  Fail: (273) [user] symbol(";;                   Ok(vec![sym!(\"42\")]));")
^  Redo: (272) [user] mfix_vars1(";;                   Ok(vec![sym!(\"42\")]));", _424882)
   Call: (273) [system] ";;                   Ok(vec![sym!(\"42\")]));"=_424882
   Exit: (273) [system] ";;                   Ok(vec![sym!(\"42\")]));"=";;                   Ok(vec![sym!(\"42\")]));"
^  Exit: (272) [user] mfix_vars1(";;                   Ok(vec![sym!(\"42\")]));", ";;                   Ok(vec![sym!(\"42\")]));")
   Call: (272) [apply] apply:maplist_([1258, 0], _424884, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1258, 0], [_462880|_462882], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1258, _462880)
^  Unify: (273) [user] mfix_vars1(1258, _462880)
   Call: (274) [system] var(1258)
^  Redo: (273) [user] mfix_vars1(1258, _462880)
^  Unify: (273) [user] mfix_vars1(1258, '$VAR'(_467526))
   Call: (274) [system] atom(1258)
^  Redo: (273) [user] mfix_vars1(1258, _462880)
^  Unify: (273) [user] mfix_vars1(1258, _462880)
   Call: (274) [system] 1258==true
^  Redo: (273) [user] mfix_vars1(1258, _462880)
^  Unify: (273) [user] mfix_vars1(1258, _462880)
   Call: (274) [system] 1258==false
^  Redo: (273) [user] mfix_vars1(1258, _462880)
^  Unify: (273) [user] mfix_vars1(1258, _462880)
   Call: (274) [system] 1258==[_476806, _476812]
^  Redo: (273) [user] mfix_vars1(1258, _462880)
^  Unify: (273) [user] mfix_vars1(1258, _462880)
   Call: (274) [system] is_list(1258)
^  Redo: (273) [user] mfix_vars1(1258, _462880)
^  Unify: (273) [user] mfix_vars1(1258, _462880)
   Call: (274) [system] string(1258)
^  Redo: (273) [user] mfix_vars1(1258, _462880)
^  Unify: (273) [user] mfix_vars1(1258, _462880)
   Call: (274) [system] compound(1258)
^  Redo: (273) [user] mfix_vars1(1258, _462880)
^  Unify: (273) [user] mfix_vars1(1258, _462880)
^  Call: (274) [user] symbol(1258)
^  Unify: (274) [user] symbol(1258)
   Call: (275) [system] atom(1258)
   Fail: (275) [system] atom(1258)
^  Fail: (274) [user] symbol(1258)
^  Redo: (273) [user] mfix_vars1(1258, _462880)
   Call: (274) [system] 1258=_462880
   Exit: (274) [system] 1258=1258
^  Exit: (273) [user] mfix_vars1(1258, 1258)
   Call: (273) [apply] apply:maplist_([0], _462882, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_497206|_497208], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _497206)
^  Unify: (274) [user] mfix_vars1(0, _497206)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _497206)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_501852))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _497206)
^  Unify: (274) [user] mfix_vars1(0, _497206)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _497206)
^  Unify: (274) [user] mfix_vars1(0, _497206)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _497206)
^  Unify: (274) [user] mfix_vars1(0, _497206)
   Call: (275) [system] 0==[_511132, _511138]
^  Redo: (274) [user] mfix_vars1(0, _497206)
^  Unify: (274) [user] mfix_vars1(0, _497206)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _497206)
^  Unify: (274) [user] mfix_vars1(0, _497206)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _497206)
^  Unify: (274) [user] mfix_vars1(0, _497206)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _497206)
^  Unify: (274) [user] mfix_vars1(0, _497206)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6044)
   Call: (275) [system] 0=_6044
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6046, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1258, 0], [1258, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;                   Ok(vec![sym!(\"42\")]));", 1258, 0], [";;                   Ok(vec![sym!(\"42\")]));", 1258, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;                   Ok(vec![sym!(\"42\")]));", 1258, 0], [";;                   Ok(vec![sym!(\"42\")]));", 1258, 0])
   Call: (270) [system] compound_name_arguments(_5986, '$COMMENT', [";;                   Ok(vec![sym!(\"42\")]));", 1258, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT', [";;                   Ok(vec![sym!(\"42\")]));", 1258, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0)))
   Call: (267) [system] '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0)\=@='$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _5972)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _29284))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _29284))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _29284))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _29284))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _29284)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _29284)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _34870))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _34870))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _34870)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _34870)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _34870)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0)))
   Call: (267) [system] '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0)\=@='$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _29284)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _5952))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _5952))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _5952))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _5952))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _5952)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _57190))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _57190))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _57190)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _57190)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _57190)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0)))
   Call: (267) [system] '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0)\=@='$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0)))
   Call: (261) [system] '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0)\=@='$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _85968, [], _85970)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _85968, [], _85970)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _85968, [], _85970)
   Call: (258) [system] atom('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _85968, [], _85970)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _85968, [], _85970)
   Call: (258) [system] compound('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
   Exit: (258) [system] compound('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), _95284, _95286)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT', [";;                   Ok(vec![sym!(\"42\")]));", 1258, 0])
^  Call: (258) [user] subst_vars([";;                   Ok(vec![sym!(\"42\")]));", 1258, 0], _97170, [], _85970)
^  Unify: (258) [user] subst_vars([";;                   Ok(vec![sym!(\"42\")]));", 1258, 0], [";;                   Ok(vec![sym!(\"42\")]));", 1258, 0], [], [])
   Call: (259) [system] var([";;                   Ok(vec![sym!(\"42\")]));", 1258, 0])
^  Redo: (258) [user] subst_vars([";;                   Ok(vec![sym!(\"42\")]));", 1258, 0], _97170, [], _85970)
^  Unify: (258) [user] subst_vars([";;                   Ok(vec![sym!(\"42\")]));", 1258, 0], [_100906|_100908], [], _85970)
^  Call: (259) [user] subst_vars(";;                   Ok(vec![sym!(\"42\")]));", _100906, [], _101846)
^  Unify: (259) [user] subst_vars(";;                   Ok(vec![sym!(\"42\")]));", ";;                   Ok(vec![sym!(\"42\")]));", [], [])
   Call: (260) [system] var(";;                   Ok(vec![sym!(\"42\")]));")
^  Redo: (259) [user] subst_vars(";;                   Ok(vec![sym!(\"42\")]));", _100906, [], _101846)
^  Unify: (259) [user] subst_vars(";;                   Ok(vec![sym!(\"42\")]));", _100906, [], _101846)
   Call: (260) [system] atom(";;                   Ok(vec![sym!(\"42\")]));")
^  Redo: (259) [user] subst_vars(";;                   Ok(vec![sym!(\"42\")]));", _100906, [], _101846)
^  Unify: (259) [user] subst_vars(";;                   Ok(vec![sym!(\"42\")]));", _100906, [], _101846)
   Call: (260) [system] compound(";;                   Ok(vec![sym!(\"42\")]));")
^  Redo: (259) [user] subst_vars(";;                   Ok(vec![sym!(\"42\")]));", _100906, [], _101846)
^  Unify: (259) [user] subst_vars(";;                   Ok(vec![sym!(\"42\")]));", ";;                   Ok(vec![sym!(\"42\")]));", [], [])
^  Exit: (259) [user] subst_vars(";;                   Ok(vec![sym!(\"42\")]));", ";;                   Ok(vec![sym!(\"42\")]));", [], [])
^  Call: (259) [user] subst_vars([1258, 0], _100908, [], _85970)
^  Unify: (259) [user] subst_vars([1258, 0], [1258, 0], [], [])
   Call: (260) [system] var([1258, 0])
^  Redo: (259) [user] subst_vars([1258, 0], _100908, [], _85970)
^  Unify: (259) [user] subst_vars([1258, 0], [_116778|_116780], [], _85970)
^  Call: (260) [user] subst_vars(1258, _116778, [], _117718)
^  Unify: (260) [user] subst_vars(1258, 1258, [], [])
   Call: (261) [system] var(1258)
^  Redo: (260) [user] subst_vars(1258, _116778, [], _117718)
^  Unify: (260) [user] subst_vars(1258, _116778, [], _117718)
   Call: (261) [system] atom(1258)
^  Redo: (260) [user] subst_vars(1258, _116778, [], _117718)
^  Unify: (260) [user] subst_vars(1258, _116778, [], _117718)
   Call: (261) [system] compound(1258)
^  Redo: (260) [user] subst_vars(1258, _116778, [], _117718)
^  Unify: (260) [user] subst_vars(1258, 1258, [], [])
^  Exit: (260) [user] subst_vars(1258, 1258, [], [])
^  Call: (260) [user] subst_vars([0], _116780, [], _85970)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _116780, [], _85970)
^  Unify: (260) [user] subst_vars([0], [_132650|_132652], [], _85970)
^  Call: (261) [user] subst_vars(0, _132650, [], _133590)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _132650, [], _133590)
^  Unify: (261) [user] subst_vars(0, _132650, [], _133590)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _132650, [], _133590)
^  Unify: (261) [user] subst_vars(0, _132650, [], _133590)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _132650, [], _133590)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _132652, [], _85970)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _132652, [], _85970)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1258, 0], [1258, 0], [], [])
^  Exit: (258) [user] subst_vars([";;                   Ok(vec![sym!(\"42\")]));", 1258, 0], [";;                   Ok(vec![sym!(\"42\")]));", 1258, 0], [], [])
   Call: (258) [system] compound_name_arguments(_85968, '$COMMENT', [";;                   Ok(vec![sym!(\"42\")]));", 1258, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT', [";;                   Ok(vec![sym!(\"42\")]));", 1258, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), [], [])
   Call: (257) [system] _156008=metta_file_buffer(+, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                   Ok(vec![sym!(\"42\")]));", 1258, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1259, 0, 45340, '$COMMENT'(";;    }", 1259, 0), '$stream_position'(45340, 1259, 0, 45340)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1259, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1259, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    }", 1259, 0), _208726))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1259, 0), _208726))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    }", 1259, 0), _208726)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1259, 0), _208726)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1259, 0), _208726)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1259, 0), _208726)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    }", 1259, 0), _214338))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1259, 0), _214338))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1259, 0), _214338))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1259, 0), _214338))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1259, 0), _214338)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1259, 0), _214338)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    }", 1259, 0), _219924))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1259, 0), _219924))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    }", 1259, 0), _219924)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1259, 0), _219924)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1259, 0), _219924)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1259, 0), _219924)
   Call: (270) [system] var('$COMMENT'(";;    }", 1259, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1259, 0), _219924)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1259, 0), '$VAR'(_227384))
   Call: (270) [system] atom('$COMMENT'(";;    }", 1259, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1259, 0), _219924)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1259, 0), _219924)
   Call: (270) [system] '$COMMENT'(";;    }", 1259, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1259, 0), _219924)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1259, 0), _219924)
   Call: (270) [system] '$COMMENT'(";;    }", 1259, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1259, 0), _219924)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1259, 0), _219924)
   Call: (270) [system] '$COMMENT'(";;    }", 1259, 0)==[_236664, _236670]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1259, 0), _219924)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1259, 0), _219924)
   Call: (270) [system] is_list('$COMMENT'(";;    }", 1259, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1259, 0), _219924)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1259, 0), _219924)
   Call: (270) [system] string('$COMMENT'(";;    }", 1259, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1259, 0), _219924)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1259, 0), _219924)
   Call: (270) [system] compound('$COMMENT'(";;    }", 1259, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    }", 1259, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1259, 0), _246866, _246868)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1259, 0), '$COMMENT', [";;    }", 1259, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    }", 1259, 0], _250608)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1259, 0], _250608)
   Call: (271) [apply] apply:maplist_([";;    }", 1259, 0], _250608, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    }", 1259, 0], [_253426|_253428], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    }", _253426)
^  Unify: (272) [user] mfix_vars1(";;    }", _253426)
   Call: (273) [system] var(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _253426)
^  Unify: (272) [user] mfix_vars1(";;    }", '$VAR'(_258072))
   Call: (273) [system] atom(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _253426)
^  Unify: (272) [user] mfix_vars1(";;    }", _253426)
   Call: (273) [system] ";;    }"==true
^  Redo: (272) [user] mfix_vars1(";;    }", _253426)
^  Unify: (272) [user] mfix_vars1(";;    }", _253426)
   Call: (273) [system] ";;    }"==false
^  Redo: (272) [user] mfix_vars1(";;    }", _253426)
^  Unify: (272) [user] mfix_vars1(";;    }", _253426)
   Call: (273) [system] ";;    }"==[_267352, _267358]
^  Redo: (272) [user] mfix_vars1(";;    }", _253426)
^  Unify: (272) [user] mfix_vars1(";;    }", _253426)
   Call: (273) [system] is_list(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _253426)
^  Unify: (272) [user] mfix_vars1(";;    }", _253426)
   Call: (273) [system] string(";;    }")
   Exit: (273) [system] string(";;    }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    }", _253426)
^  Unify: (272) [user] mfix_vars1(";;    }", _253426)
   Call: (273) [system] compound(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _253426)
^  Unify: (272) [user] mfix_vars1(";;    }", _253426)
^  Call: (273) [user] symbol(";;    }")
^  Unify: (273) [user] symbol(";;    }")
   Call: (274) [system] atom(";;    }")
   Fail: (274) [system] atom(";;    }")
^  Fail: (273) [user] symbol(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _253426)
   Call: (273) [system] ";;    }"=_253426
   Exit: (273) [system] ";;    }"=";;    }"
^  Exit: (272) [user] mfix_vars1(";;    }", ";;    }")
   Call: (272) [apply] apply:maplist_([1259, 0], _253428, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1259, 0], [_291424|_291426], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1259, _291424)
^  Unify: (273) [user] mfix_vars1(1259, _291424)
   Call: (274) [system] var(1259)
^  Redo: (273) [user] mfix_vars1(1259, _291424)
^  Unify: (273) [user] mfix_vars1(1259, '$VAR'(_296070))
   Call: (274) [system] atom(1259)
^  Redo: (273) [user] mfix_vars1(1259, _291424)
^  Unify: (273) [user] mfix_vars1(1259, _291424)
   Call: (274) [system] 1259==true
^  Redo: (273) [user] mfix_vars1(1259, _291424)
^  Unify: (273) [user] mfix_vars1(1259, _291424)
   Call: (274) [system] 1259==false
^  Redo: (273) [user] mfix_vars1(1259, _291424)
^  Unify: (273) [user] mfix_vars1(1259, _291424)
   Call: (274) [system] 1259==[_305350, _305356]
^  Redo: (273) [user] mfix_vars1(1259, _291424)
^  Unify: (273) [user] mfix_vars1(1259, _291424)
   Call: (274) [system] is_list(1259)
^  Redo: (273) [user] mfix_vars1(1259, _291424)
^  Unify: (273) [user] mfix_vars1(1259, _291424)
   Call: (274) [system] string(1259)
^  Redo: (273) [user] mfix_vars1(1259, _291424)
^  Unify: (273) [user] mfix_vars1(1259, _291424)
   Call: (274) [system] compound(1259)
^  Redo: (273) [user] mfix_vars1(1259, _291424)
^  Unify: (273) [user] mfix_vars1(1259, _291424)
^  Call: (274) [user] symbol(1259)
^  Unify: (274) [user] symbol(1259)
   Call: (275) [system] atom(1259)
   Fail: (275) [system] atom(1259)
^  Fail: (274) [user] symbol(1259)
^  Redo: (273) [user] mfix_vars1(1259, _291424)
   Call: (274) [system] 1259=_291424
   Exit: (274) [system] 1259=1259
^  Exit: (273) [user] mfix_vars1(1259, 1259)
   Call: (273) [apply] apply:maplist_([0], _291426, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_325750|_325752], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _325750)
^  Unify: (274) [user] mfix_vars1(0, _325750)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _325750)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_330396))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _325750)
^  Unify: (274) [user] mfix_vars1(0, _325750)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _325750)
^  Unify: (274) [user] mfix_vars1(0, _325750)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _325750)
^  Unify: (274) [user] mfix_vars1(0, _325750)
   Call: (275) [system] 0==[_339676, _339682]
^  Redo: (274) [user] mfix_vars1(0, _325750)
^  Unify: (274) [user] mfix_vars1(0, _325750)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _325750)
^  Unify: (274) [user] mfix_vars1(0, _325750)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _325750)
^  Unify: (274) [user] mfix_vars1(0, _325750)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _325750)
^  Unify: (274) [user] mfix_vars1(0, _325750)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _325750)
   Call: (275) [system] 0=_325750
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _325752, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1259, 0], [1259, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    }", 1259, 0], [";;    }", 1259, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1259, 0], [";;    }", 1259, 0])
   Call: (270) [system] compound_name_arguments(_219924, '$COMMENT', [";;    }", 1259, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1259, 0), '$COMMENT', [";;    }", 1259, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1259, 0)\=@='$COMMENT'(";;    }", 1259, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1259, 0), _214338)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    }", 1259, 0), _375924))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1259, 0), _375924))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1259, 0), _375924))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1259, 0), _375924))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1259, 0), _375924)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1259, 0), _375924)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    }", 1259, 0), _381510))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1259, 0), _381510))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    }", 1259, 0), _381510)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1259, 0), _381510)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    }", 1259, 0), _381510)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1259, 0)\=@='$COMMENT'(";;    }", 1259, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1259, 0), _375924)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    }", 1259, 0), _208726))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1259, 0), _208726))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1259, 0), _208726))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1259, 0), _208726))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1259, 0), _208726)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1259, 0), _208726)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    }", 1259, 0), _403830))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1259, 0), _403830))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    }", 1259, 0), _403830)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1259, 0), _403830)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    }", 1259, 0), _403830)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1259, 0)\=@='$COMMENT'(";;    }", 1259, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1259, 0), _208726)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0)))
   Call: (261) [system] '$COMMENT'(";;    }", 1259, 0)\=@='$COMMENT'(";;    }", 1259, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1259, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1259, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1259, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1259, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1259, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    }", 1259, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    }", 1259, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    }", 1259, 0), _432608, [], _432610)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    }", 1259, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1259, 0), _432608, [], _432610)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1259, 0), _432608, [], _432610)
   Call: (258) [system] atom('$COMMENT'(";;    }", 1259, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1259, 0), _432608, [], _432610)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1259, 0), _432608, [], _432610)
   Call: (258) [system] compound('$COMMENT'(";;    }", 1259, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    }", 1259, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1259, 0), _441924, _441926)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1259, 0), '$COMMENT', [";;    }", 1259, 0])
^  Call: (258) [user] subst_vars([";;    }", 1259, 0], _443810, [], _432610)
^  Unify: (258) [user] subst_vars([";;    }", 1259, 0], [";;    }", 1259, 0], [], [])
   Call: (259) [system] var([";;    }", 1259, 0])
^  Redo: (258) [user] subst_vars([";;    }", 1259, 0], _443810, [], _432610)
^  Unify: (258) [user] subst_vars([";;    }", 1259, 0], [_447546|_447548], [], _432610)
^  Call: (259) [user] subst_vars(";;    }", _447546, [], _448486)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
   Call: (260) [system] var(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _447546, [], _448486)
^  Unify: (259) [user] subst_vars(";;    }", _447546, [], _448486)
   Call: (260) [system] atom(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _447546, [], _448486)
^  Unify: (259) [user] subst_vars(";;    }", _447546, [], _448486)
   Call: (260) [system] compound(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _447546, [], _448486)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Exit: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Call: (259) [user] subst_vars([1259, 0], _447548, [], _432610)
^  Unify: (259) [user] subst_vars([1259, 0], [1259, 0], [], [])
   Call: (260) [system] var([1259, 0])
^  Redo: (259) [user] subst_vars([1259, 0], _447548, [], _432610)
^  Unify: (259) [user] subst_vars([1259, 0], [_463418|_463420], [], _432610)
^  Call: (260) [user] subst_vars(1259, _463418, [], _464358)
^  Unify: (260) [user] subst_vars(1259, 1259, [], [])
   Call: (261) [system] var(1259)
^  Redo: (260) [user] subst_vars(1259, _463418, [], _464358)
^  Unify: (260) [user] subst_vars(1259, _463418, [], _464358)
   Call: (261) [system] atom(1259)
^  Redo: (260) [user] subst_vars(1259, _463418, [], _464358)
^  Unify: (260) [user] subst_vars(1259, _463418, [], _464358)
   Call: (261) [system] compound(1259)
^  Redo: (260) [user] subst_vars(1259, _463418, [], _464358)
^  Unify: (260) [user] subst_vars(1259, 1259, [], [])
^  Exit: (260) [user] subst_vars(1259, 1259, [], [])
^  Call: (260) [user] subst_vars([0], _463420, [], _432610)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _463420, [], _432610)
^  Unify: (260) [user] subst_vars([0], [_479290|_479292], [], _432610)
^  Call: (261) [user] subst_vars(0, _479290, [], _480230)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _479290, [], _480230)
^  Unify: (261) [user] subst_vars(0, _479290, [], _480230)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _479290, [], _480230)
^  Unify: (261) [user] subst_vars(0, _479290, [], _480230)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _479290, [], _480230)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _479292, [], _432610)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _479292, [], _432610)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1259, 0], [1259, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    }", 1259, 0], [";;    }", 1259, 0], [], [])
   Call: (258) [system] compound_name_arguments(_432608, '$COMMENT', [";;    }", 1259, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1259, 0), '$COMMENT', [";;    }", 1259, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    }", 1259, 0), '$COMMENT'(";;    }", 1259, 0), [], [])
   Call: (257) [system] _502648=metta_file_buffer(+, '$COMMENT'(";;    }", 1259, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    }", 1259, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    }", 1259, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1259, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1259, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1259, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1259, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1259, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1259, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1260, 0, 45348, '$COMMENT'(";; Converted:", 1260, 0), '$stream_position'(45348, 1260, 0, 45348)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1260, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1260, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1260, 0), _38338))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1260, 0), _38338))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1260, 0), _38338)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1260, 0), _38338)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1260, 0), _38338)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1260, 0), _38338)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1260, 0), _43950))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1260, 0), _43950))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1260, 0), _43950))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1260, 0), _43950))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1260, 0), _43950)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1260, 0), _43950)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1260, 0), _49536))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1260, 0), _49536))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1260, 0), _49536)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1260, 0), _49536)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1260, 0), _49536)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1260, 0), _49536)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1260, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1260, 0), _49536)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1260, 0), '$VAR'(_56996))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1260, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1260, 0), _49536)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1260, 0), _49536)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1260, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1260, 0), _49536)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1260, 0), _49536)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1260, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1260, 0), _49536)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1260, 0), _49536)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1260, 0)==[_66276, _66282]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1260, 0), _49536)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1260, 0), _49536)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1260, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1260, 0), _49536)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1260, 0), _49536)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1260, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1260, 0), _49536)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1260, 0), _49536)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1260, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1260, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1260, 0), _76478, _76480)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1260, 0), '$COMMENT', [";; Converted:", 1260, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1260, 0], _80220)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1260, 0], _80220)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1260, 0], _80220, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1260, 0], [_83038|_83040], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _83038)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _83038)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _83038)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_87684))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _83038)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _83038)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _83038)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _83038)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _83038)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _83038)
   Call: (273) [system] ";; Converted:"==[_96964, _96970]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _83038)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _83038)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _83038)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _83038)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _83038)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _83038)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _83038)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _83038)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _83038)
   Call: (273) [system] ";; Converted:"=_83038
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1260, 0], _83040, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1260, 0], [_121036|_121038], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1260, _121036)
^  Unify: (273) [user] mfix_vars1(1260, _121036)
   Call: (274) [system] var(1260)
^  Redo: (273) [user] mfix_vars1(1260, _121036)
^  Unify: (273) [user] mfix_vars1(1260, '$VAR'(_125682))
   Call: (274) [system] atom(1260)
^  Redo: (273) [user] mfix_vars1(1260, _121036)
^  Unify: (273) [user] mfix_vars1(1260, _121036)
   Call: (274) [system] 1260==true
^  Redo: (273) [user] mfix_vars1(1260, _121036)
^  Unify: (273) [user] mfix_vars1(1260, _121036)
   Call: (274) [system] 1260==false
^  Redo: (273) [user] mfix_vars1(1260, _121036)
^  Unify: (273) [user] mfix_vars1(1260, _121036)
   Call: (274) [system] 1260==[_134962, _134968]
^  Redo: (273) [user] mfix_vars1(1260, _121036)
^  Unify: (273) [user] mfix_vars1(1260, _121036)
   Call: (274) [system] is_list(1260)
^  Redo: (273) [user] mfix_vars1(1260, _121036)
^  Unify: (273) [user] mfix_vars1(1260, _121036)
   Call: (274) [system] string(1260)
^  Redo: (273) [user] mfix_vars1(1260, _121036)
^  Unify: (273) [user] mfix_vars1(1260, _121036)
   Call: (274) [system] compound(1260)
^  Redo: (273) [user] mfix_vars1(1260, _121036)
^  Unify: (273) [user] mfix_vars1(1260, _121036)
^  Call: (274) [user] symbol(1260)
^  Unify: (274) [user] symbol(1260)
   Call: (275) [system] atom(1260)
   Fail: (275) [system] atom(1260)
^  Fail: (274) [user] symbol(1260)
^  Redo: (273) [user] mfix_vars1(1260, _121036)
   Call: (274) [system] 1260=_121036
   Exit: (274) [system] 1260=1260
^  Exit: (273) [user] mfix_vars1(1260, 1260)
   Call: (273) [apply] apply:maplist_([0], _121038, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_155362|_155364], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _155362)
^  Unify: (274) [user] mfix_vars1(0, _155362)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _155362)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_160008))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _155362)
^  Unify: (274) [user] mfix_vars1(0, _155362)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _155362)
^  Unify: (274) [user] mfix_vars1(0, _155362)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _155362)
^  Unify: (274) [user] mfix_vars1(0, _155362)
   Call: (275) [system] 0==[_169288, _169294]
^  Redo: (274) [user] mfix_vars1(0, _155362)
^  Unify: (274) [user] mfix_vars1(0, _155362)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _155362)
^  Unify: (274) [user] mfix_vars1(0, _155362)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _155362)
^  Unify: (274) [user] mfix_vars1(0, _155362)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _155362)
^  Unify: (274) [user] mfix_vars1(0, _155362)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _155362)
   Call: (275) [system] 0=_155362
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _155364, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1260, 0], [1260, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1260, 0], [";; Converted:", 1260, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1260, 0], [";; Converted:", 1260, 0])
   Call: (270) [system] compound_name_arguments(_49536, '$COMMENT', [";; Converted:", 1260, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1260, 0), '$COMMENT', [";; Converted:", 1260, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1260, 0)\=@='$COMMENT'(";; Converted:", 1260, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1260, 0), _43950)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1260, 0), _205536))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1260, 0), _205536))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1260, 0), _205536))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1260, 0), _205536))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1260, 0), _205536)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1260, 0), _205536)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1260, 0), _211122))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1260, 0), _211122))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1260, 0), _211122)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1260, 0), _211122)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1260, 0), _211122)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1260, 0)\=@='$COMMENT'(";; Converted:", 1260, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1260, 0), _205536)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1260, 0), _38338))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1260, 0), _38338))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1260, 0), _38338))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1260, 0), _38338))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1260, 0), _38338)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1260, 0), _38338)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1260, 0), _233442))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1260, 0), _233442))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1260, 0), _233442)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1260, 0), _233442)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1260, 0), _233442)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1260, 0)\=@='$COMMENT'(";; Converted:", 1260, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1260, 0), _38338)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1260, 0)\=@='$COMMENT'(";; Converted:", 1260, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1260, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1260, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1260, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1260, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1260, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1260, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1260, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1260, 0), _262220, [], _262222)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1260, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1260, 0), _262220, [], _262222)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1260, 0), _262220, [], _262222)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1260, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1260, 0), _262220, [], _262222)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1260, 0), _262220, [], _262222)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1260, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1260, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1260, 0), _271536, _271538)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1260, 0), '$COMMENT', [";; Converted:", 1260, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1260, 0], _273422, [], _262222)
^  Unify: (258) [user] subst_vars([";; Converted:", 1260, 0], [";; Converted:", 1260, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1260, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1260, 0], _273422, [], _262222)
^  Unify: (258) [user] subst_vars([";; Converted:", 1260, 0], [_277158|_277160], [], _262222)
^  Call: (259) [user] subst_vars(";; Converted:", _277158, [], _278098)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _277158, [], _278098)
^  Unify: (259) [user] subst_vars(";; Converted:", _277158, [], _278098)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _277158, [], _278098)
^  Unify: (259) [user] subst_vars(";; Converted:", _277158, [], _278098)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _277158, [], _278098)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1260, 0], _277160, [], _262222)
^  Unify: (259) [user] subst_vars([1260, 0], [1260, 0], [], [])
   Call: (260) [system] var([1260, 0])
^  Redo: (259) [user] subst_vars([1260, 0], _277160, [], _262222)
^  Unify: (259) [user] subst_vars([1260, 0], [_293030|_293032], [], _262222)
^  Call: (260) [user] subst_vars(1260, _293030, [], _293970)
^  Unify: (260) [user] subst_vars(1260, 1260, [], [])
   Call: (261) [system] var(1260)
^  Redo: (260) [user] subst_vars(1260, _293030, [], _293970)
^  Unify: (260) [user] subst_vars(1260, _293030, [], _293970)
   Call: (261) [system] atom(1260)
^  Redo: (260) [user] subst_vars(1260, _293030, [], _293970)
^  Unify: (260) [user] subst_vars(1260, _293030, [], _293970)
   Call: (261) [system] compound(1260)
^  Redo: (260) [user] subst_vars(1260, _293030, [], _293970)
^  Unify: (260) [user] subst_vars(1260, 1260, [], [])
^  Exit: (260) [user] subst_vars(1260, 1260, [], [])
^  Call: (260) [user] subst_vars([0], _293032, [], _262222)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _293032, [], _262222)
^  Unify: (260) [user] subst_vars([0], [_308902|_308904], [], _262222)
^  Call: (261) [user] subst_vars(0, _308902, [], _309842)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _308902, [], _309842)
^  Unify: (261) [user] subst_vars(0, _308902, [], _309842)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _308902, [], _309842)
^  Unify: (261) [user] subst_vars(0, _308902, [], _309842)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _308902, [], _309842)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _308904, [], _262222)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _308904, [], _262222)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1260, 0], [1260, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1260, 0], [";; Converted:", 1260, 0], [], [])
   Call: (258) [system] compound_name_arguments(_262220, '$COMMENT', [";; Converted:", 1260, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1260, 0), '$COMMENT', [";; Converted:", 1260, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1260, 0), '$COMMENT'(";; Converted:", 1260, 0), [], [])
   Call: (257) [system] _332260=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1260, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1260, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1260, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1260, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1260, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1260, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1260, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1260, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1260, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1263, 0, 45401, '$COMMENT'(";; Original:", 1263, 0), '$stream_position'(45401, 1263, 0, 45401)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1263, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1263, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1263, 0), _384978))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1263, 0), _384978))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1263, 0), _384978)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1263, 0), _384978)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1263, 0), _384978)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1263, 0), _384978)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1263, 0), _390590))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1263, 0), _390590))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1263, 0), _390590))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1263, 0), _390590))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1263, 0), _390590)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1263, 0), _390590)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1263, 0), _396176))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1263, 0), _396176))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1263, 0), _396176)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1263, 0), _396176)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1263, 0), _396176)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1263, 0), _396176)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1263, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1263, 0), _396176)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1263, 0), '$VAR'(_403636))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1263, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1263, 0), _396176)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1263, 0), _396176)
   Call: (270) [system] '$COMMENT'(";; Original:", 1263, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1263, 0), _396176)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1263, 0), _396176)
   Call: (270) [system] '$COMMENT'(";; Original:", 1263, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1263, 0), _396176)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1263, 0), _396176)
   Call: (270) [system] '$COMMENT'(";; Original:", 1263, 0)==[_412916, _412922]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1263, 0), _396176)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1263, 0), _396176)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1263, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1263, 0), _396176)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1263, 0), _396176)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1263, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1263, 0), _396176)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1263, 0), _396176)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1263, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1263, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1263, 0), _423118, _423120)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1263, 0), '$COMMENT', [";; Original:", 1263, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1263, 0], _426860)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1263, 0], _426860)
   Call: (271) [apply] apply:maplist_([";; Original:", 1263, 0], _426860, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1263, 0], [_429678|_429680], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _429678)
^  Unify: (272) [user] mfix_vars1(";; Original:", _429678)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _429678)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_434324))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _429678)
^  Unify: (272) [user] mfix_vars1(";; Original:", _429678)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _429678)
^  Unify: (272) [user] mfix_vars1(";; Original:", _429678)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _429678)
^  Unify: (272) [user] mfix_vars1(";; Original:", _429678)
   Call: (273) [system] ";; Original:"==[_443604, _443610]
^  Redo: (272) [user] mfix_vars1(";; Original:", _429678)
^  Unify: (272) [user] mfix_vars1(";; Original:", _429678)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _429678)
^  Unify: (272) [user] mfix_vars1(";; Original:", _429678)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _429678)
^  Unify: (272) [user] mfix_vars1(";; Original:", _429678)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _429678)
^  Unify: (272) [user] mfix_vars1(";; Original:", _429678)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _429678)
   Call: (273) [system] ";; Original:"=_429678
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1263, 0], _429680, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1263, 0], [_467676|_467678], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1263, _467676)
^  Unify: (273) [user] mfix_vars1(1263, _467676)
   Call: (274) [system] var(1263)
^  Redo: (273) [user] mfix_vars1(1263, _467676)
^  Unify: (273) [user] mfix_vars1(1263, '$VAR'(_472322))
   Call: (274) [system] atom(1263)
^  Redo: (273) [user] mfix_vars1(1263, _467676)
^  Unify: (273) [user] mfix_vars1(1263, _467676)
   Call: (274) [system] 1263==true
^  Redo: (273) [user] mfix_vars1(1263, _467676)
^  Unify: (273) [user] mfix_vars1(1263, _467676)
   Call: (274) [system] 1263==false
^  Redo: (273) [user] mfix_vars1(1263, _467676)
^  Unify: (273) [user] mfix_vars1(1263, _467676)
   Call: (274) [system] 1263==[_481602, _481608]
^  Redo: (273) [user] mfix_vars1(1263, _467676)
^  Unify: (273) [user] mfix_vars1(1263, _467676)
   Call: (274) [system] is_list(1263)
^  Redo: (273) [user] mfix_vars1(1263, _467676)
^  Unify: (273) [user] mfix_vars1(1263, _467676)
   Call: (274) [system] string(1263)
^  Redo: (273) [user] mfix_vars1(1263, _467676)
^  Unify: (273) [user] mfix_vars1(1263, _467676)
   Call: (274) [system] compound(1263)
^  Redo: (273) [user] mfix_vars1(1263, _467676)
^  Unify: (273) [user] mfix_vars1(1263, _467676)
^  Call: (274) [user] symbol(1263)
^  Unify: (274) [user] symbol(1263)
   Call: (275) [system] atom(1263)
   Fail: (275) [system] atom(1263)
^  Fail: (274) [user] symbol(1263)
^  Redo: (273) [user] mfix_vars1(1263, _467676)
   Call: (274) [system] 1263=_467676
   Exit: (274) [system] 1263=1263
^  Exit: (273) [user] mfix_vars1(1263, 1263)
   Call: (273) [apply] apply:maplist_([0], _467678, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_502002|_502004], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _502002)
^  Unify: (274) [user] mfix_vars1(0, _502002)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _502002)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_506648))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _502002)
^  Unify: (274) [user] mfix_vars1(0, _502002)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _502002)
^  Unify: (274) [user] mfix_vars1(0, _502002)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _502002)
^  Unify: (274) [user] mfix_vars1(0, _502002)
   Call: (275) [system] 0==[_515928, _515934]
^  Redo: (274) [user] mfix_vars1(0, _502002)
^  Unify: (274) [user] mfix_vars1(0, _502002)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _502002)
^  Unify: (274) [user] mfix_vars1(0, _502002)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _502002)
^  Unify: (274) [user] mfix_vars1(0, _6036)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _6036)
^  Unify: (274) [user] mfix_vars1(0, _6036)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6036)
   Call: (275) [system] 0=_6036
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6038, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1263, 0], [1263, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1263, 0], [";; Original:", 1263, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1263, 0], [";; Original:", 1263, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";; Original:", 1263, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1263, 0), '$COMMENT', [";; Original:", 1263, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1263, 0)\=@='$COMMENT'(";; Original:", 1263, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1263, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1263, 0), _34288))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1263, 0), _34288))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1263, 0), _34288))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1263, 0), _34288))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1263, 0), _34288)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1263, 0), _34288)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1263, 0), _39874))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1263, 0), _39874))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1263, 0), _39874)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1263, 0), _39874)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1263, 0), _39874)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1263, 0)\=@='$COMMENT'(";; Original:", 1263, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1263, 0), _34288)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1263, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1263, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1263, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1263, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1263, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1263, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1263, 0), _62194))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1263, 0), _62194))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1263, 0), _62194)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1263, 0), _62194)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1263, 0), _62194)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1263, 0)\=@='$COMMENT'(";; Original:", 1263, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1263, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1263, 0)\=@='$COMMENT'(";; Original:", 1263, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1263, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1263, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1263, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1263, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1263, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1263, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1263, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1263, 0), _90972, [], _90974)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1263, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1263, 0), _90972, [], _90974)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1263, 0), _90972, [], _90974)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1263, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1263, 0), _90972, [], _90974)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1263, 0), _90972, [], _90974)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1263, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1263, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1263, 0), _100288, _100290)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1263, 0), '$COMMENT', [";; Original:", 1263, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1263, 0], _102174, [], _90974)
^  Unify: (258) [user] subst_vars([";; Original:", 1263, 0], [";; Original:", 1263, 0], [], [])
   Call: (259) [system] var([";; Original:", 1263, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1263, 0], _102174, [], _90974)
^  Unify: (258) [user] subst_vars([";; Original:", 1263, 0], [_105910|_105912], [], _90974)
^  Call: (259) [user] subst_vars(";; Original:", _105910, [], _106850)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _105910, [], _106850)
^  Unify: (259) [user] subst_vars(";; Original:", _105910, [], _106850)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _105910, [], _106850)
^  Unify: (259) [user] subst_vars(";; Original:", _105910, [], _106850)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _105910, [], _106850)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1263, 0], _105912, [], _90974)
^  Unify: (259) [user] subst_vars([1263, 0], [1263, 0], [], [])
   Call: (260) [system] var([1263, 0])
^  Redo: (259) [user] subst_vars([1263, 0], _105912, [], _90974)
^  Unify: (259) [user] subst_vars([1263, 0], [_121782|_121784], [], _90974)
^  Call: (260) [user] subst_vars(1263, _121782, [], _122722)
^  Unify: (260) [user] subst_vars(1263, 1263, [], [])
   Call: (261) [system] var(1263)
^  Redo: (260) [user] subst_vars(1263, _121782, [], _122722)
^  Unify: (260) [user] subst_vars(1263, _121782, [], _122722)
   Call: (261) [system] atom(1263)
^  Redo: (260) [user] subst_vars(1263, _121782, [], _122722)
^  Unify: (260) [user] subst_vars(1263, _121782, [], _122722)
   Call: (261) [system] compound(1263)
^  Redo: (260) [user] subst_vars(1263, _121782, [], _122722)
^  Unify: (260) [user] subst_vars(1263, 1263, [], [])
^  Exit: (260) [user] subst_vars(1263, 1263, [], [])
^  Call: (260) [user] subst_vars([0], _121784, [], _90974)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _121784, [], _90974)
^  Unify: (260) [user] subst_vars([0], [_137654|_137656], [], _90974)
^  Call: (261) [user] subst_vars(0, _137654, [], _138594)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _137654, [], _138594)
^  Unify: (261) [user] subst_vars(0, _137654, [], _138594)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _137654, [], _138594)
^  Unify: (261) [user] subst_vars(0, _137654, [], _138594)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _137654, [], _138594)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _137656, [], _90974)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _137656, [], _90974)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1263, 0], [1263, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1263, 0], [";; Original:", 1263, 0], [], [])
   Call: (258) [system] compound_name_arguments(_90972, '$COMMENT', [";; Original:", 1263, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1263, 0), '$COMMENT', [";; Original:", 1263, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1263, 0), '$COMMENT'(";; Original:", 1263, 0), [], [])
   Call: (257) [system] _161012=metta_file_buffer(+, '$COMMENT'(";; Original:", 1263, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1263, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1263, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1263, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1263, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1263, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1263, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1263, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1263, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1264, 0, 45414, '$COMMENT'(";;    #[test]", 1264, 0), '$stream_position'(45414, 1264, 0, 45414)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1264, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1264, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1264, 0), _213730))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1264, 0), _213730))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1264, 0), _213730)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1264, 0), _213730)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1264, 0), _213730)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1264, 0), _213730)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1264, 0), _219342))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1264, 0), _219342))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1264, 0), _219342))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1264, 0), _219342))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1264, 0), _219342)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1264, 0), _219342)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    #[test]", 1264, 0), _224928))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1264, 0), _224928))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    #[test]", 1264, 0), _224928)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1264, 0), _224928)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1264, 0), _224928)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1264, 0), _224928)
   Call: (270) [system] var('$COMMENT'(";;    #[test]", 1264, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1264, 0), _224928)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1264, 0), '$VAR'(_232388))
   Call: (270) [system] atom('$COMMENT'(";;    #[test]", 1264, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1264, 0), _224928)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1264, 0), _224928)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1264, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1264, 0), _224928)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1264, 0), _224928)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1264, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1264, 0), _224928)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1264, 0), _224928)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1264, 0)==[_241668, _241674]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1264, 0), _224928)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1264, 0), _224928)
   Call: (270) [system] is_list('$COMMENT'(";;    #[test]", 1264, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1264, 0), _224928)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1264, 0), _224928)
   Call: (270) [system] string('$COMMENT'(";;    #[test]", 1264, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1264, 0), _224928)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1264, 0), _224928)
   Call: (270) [system] compound('$COMMENT'(";;    #[test]", 1264, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    #[test]", 1264, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1264, 0), _251870, _251872)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT', [";;    #[test]", 1264, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    #[test]", 1264, 0], _255612)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1264, 0], _255612)
   Call: (271) [apply] apply:maplist_([";;    #[test]", 1264, 0], _255612, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    #[test]", 1264, 0], [_258430|_258432], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    #[test]", _258430)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _258430)
   Call: (273) [system] var(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _258430)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", '$VAR'(_263076))
   Call: (273) [system] atom(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _258430)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _258430)
   Call: (273) [system] ";;    #[test]"==true
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _258430)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _258430)
   Call: (273) [system] ";;    #[test]"==false
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _258430)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _258430)
   Call: (273) [system] ";;    #[test]"==[_272356, _272362]
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _258430)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _258430)
   Call: (273) [system] is_list(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _258430)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _258430)
   Call: (273) [system] string(";;    #[test]")
   Exit: (273) [system] string(";;    #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _258430)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _258430)
   Call: (273) [system] compound(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _258430)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _258430)
^  Call: (273) [user] symbol(";;    #[test]")
^  Unify: (273) [user] symbol(";;    #[test]")
   Call: (274) [system] atom(";;    #[test]")
   Fail: (274) [system] atom(";;    #[test]")
^  Fail: (273) [user] symbol(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _258430)
   Call: (273) [system] ";;    #[test]"=_258430
   Exit: (273) [system] ";;    #[test]"=";;    #[test]"
^  Exit: (272) [user] mfix_vars1(";;    #[test]", ";;    #[test]")
   Call: (272) [apply] apply:maplist_([1264, 0], _258432, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1264, 0], [_296428|_296430], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1264, _296428)
^  Unify: (273) [user] mfix_vars1(1264, _296428)
   Call: (274) [system] var(1264)
^  Redo: (273) [user] mfix_vars1(1264, _296428)
^  Unify: (273) [user] mfix_vars1(1264, '$VAR'(_301074))
   Call: (274) [system] atom(1264)
^  Redo: (273) [user] mfix_vars1(1264, _296428)
^  Unify: (273) [user] mfix_vars1(1264, _296428)
   Call: (274) [system] 1264==true
^  Redo: (273) [user] mfix_vars1(1264, _296428)
^  Unify: (273) [user] mfix_vars1(1264, _296428)
   Call: (274) [system] 1264==false
^  Redo: (273) [user] mfix_vars1(1264, _296428)
^  Unify: (273) [user] mfix_vars1(1264, _296428)
   Call: (274) [system] 1264==[_310354, _310360]
^  Redo: (273) [user] mfix_vars1(1264, _296428)
^  Unify: (273) [user] mfix_vars1(1264, _296428)
   Call: (274) [system] is_list(1264)
^  Redo: (273) [user] mfix_vars1(1264, _296428)
^  Unify: (273) [user] mfix_vars1(1264, _296428)
   Call: (274) [system] string(1264)
^  Redo: (273) [user] mfix_vars1(1264, _296428)
^  Unify: (273) [user] mfix_vars1(1264, _296428)
   Call: (274) [system] compound(1264)
^  Redo: (273) [user] mfix_vars1(1264, _296428)
^  Unify: (273) [user] mfix_vars1(1264, _296428)
^  Call: (274) [user] symbol(1264)
^  Unify: (274) [user] symbol(1264)
   Call: (275) [system] atom(1264)
   Fail: (275) [system] atom(1264)
^  Fail: (274) [user] symbol(1264)
^  Redo: (273) [user] mfix_vars1(1264, _296428)
   Call: (274) [system] 1264=_296428
   Exit: (274) [system] 1264=1264
^  Exit: (273) [user] mfix_vars1(1264, 1264)
   Call: (273) [apply] apply:maplist_([0], _296430, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_330754|_330756], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _330754)
^  Unify: (274) [user] mfix_vars1(0, _330754)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _330754)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_335400))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _330754)
^  Unify: (274) [user] mfix_vars1(0, _330754)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _330754)
^  Unify: (274) [user] mfix_vars1(0, _330754)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _330754)
^  Unify: (274) [user] mfix_vars1(0, _330754)
   Call: (275) [system] 0==[_344680, _344686]
^  Redo: (274) [user] mfix_vars1(0, _330754)
^  Unify: (274) [user] mfix_vars1(0, _330754)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _330754)
^  Unify: (274) [user] mfix_vars1(0, _330754)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _330754)
^  Unify: (274) [user] mfix_vars1(0, _330754)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _330754)
^  Unify: (274) [user] mfix_vars1(0, _330754)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _330754)
   Call: (275) [system] 0=_330754
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _330756, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1264, 0], [1264, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    #[test]", 1264, 0], [";;    #[test]", 1264, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1264, 0], [";;    #[test]", 1264, 0])
   Call: (270) [system] compound_name_arguments(_224928, '$COMMENT', [";;    #[test]", 1264, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT', [";;    #[test]", 1264, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1264, 0)\=@='$COMMENT'(";;    #[test]", 1264, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1264, 0), _219342)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    #[test]", 1264, 0), _380928))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1264, 0), _380928))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1264, 0), _380928))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1264, 0), _380928))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1264, 0), _380928)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1264, 0), _380928)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    #[test]", 1264, 0), _386514))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1264, 0), _386514))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    #[test]", 1264, 0), _386514)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1264, 0), _386514)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1264, 0), _386514)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1264, 0)\=@='$COMMENT'(";;    #[test]", 1264, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1264, 0), _380928)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    #[test]", 1264, 0), _213730))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1264, 0), _213730))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1264, 0), _213730))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1264, 0), _213730))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1264, 0), _213730)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1264, 0), _213730)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    #[test]", 1264, 0), _408834))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1264, 0), _408834))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    #[test]", 1264, 0), _408834)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1264, 0), _408834)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1264, 0), _408834)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1264, 0)\=@='$COMMENT'(";;    #[test]", 1264, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1264, 0), _213730)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0)))
   Call: (261) [system] '$COMMENT'(";;    #[test]", 1264, 0)\=@='$COMMENT'(";;    #[test]", 1264, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1264, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1264, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1264, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1264, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1264, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1264, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1264, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1264, 0), _437612, [], _437614)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    #[test]", 1264, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1264, 0), _437612, [], _437614)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1264, 0), _437612, [], _437614)
   Call: (258) [system] atom('$COMMENT'(";;    #[test]", 1264, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1264, 0), _437612, [], _437614)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1264, 0), _437612, [], _437614)
   Call: (258) [system] compound('$COMMENT'(";;    #[test]", 1264, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    #[test]", 1264, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1264, 0), _446928, _446930)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT', [";;    #[test]", 1264, 0])
^  Call: (258) [user] subst_vars([";;    #[test]", 1264, 0], _448814, [], _437614)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1264, 0], [";;    #[test]", 1264, 0], [], [])
   Call: (259) [system] var([";;    #[test]", 1264, 0])
^  Redo: (258) [user] subst_vars([";;    #[test]", 1264, 0], _448814, [], _437614)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1264, 0], [_452550|_452552], [], _437614)
^  Call: (259) [user] subst_vars(";;    #[test]", _452550, [], _453490)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
   Call: (260) [system] var(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _452550, [], _453490)
^  Unify: (259) [user] subst_vars(";;    #[test]", _452550, [], _453490)
   Call: (260) [system] atom(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _452550, [], _453490)
^  Unify: (259) [user] subst_vars(";;    #[test]", _452550, [], _453490)
   Call: (260) [system] compound(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _452550, [], _453490)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Exit: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Call: (259) [user] subst_vars([1264, 0], _452552, [], _437614)
^  Unify: (259) [user] subst_vars([1264, 0], [1264, 0], [], [])
   Call: (260) [system] var([1264, 0])
^  Redo: (259) [user] subst_vars([1264, 0], _452552, [], _437614)
^  Unify: (259) [user] subst_vars([1264, 0], [_468422|_468424], [], _437614)
^  Call: (260) [user] subst_vars(1264, _468422, [], _469362)
^  Unify: (260) [user] subst_vars(1264, 1264, [], [])
   Call: (261) [system] var(1264)
^  Redo: (260) [user] subst_vars(1264, _468422, [], _469362)
^  Unify: (260) [user] subst_vars(1264, _468422, [], _469362)
   Call: (261) [system] atom(1264)
^  Redo: (260) [user] subst_vars(1264, _468422, [], _469362)
^  Unify: (260) [user] subst_vars(1264, _468422, [], _469362)
   Call: (261) [system] compound(1264)
^  Redo: (260) [user] subst_vars(1264, _468422, [], _469362)
^  Unify: (260) [user] subst_vars(1264, 1264, [], [])
^  Exit: (260) [user] subst_vars(1264, 1264, [], [])
^  Call: (260) [user] subst_vars([0], _468424, [], _437614)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _468424, [], _437614)
^  Unify: (260) [user] subst_vars([0], [_484294|_484296], [], _437614)
^  Call: (261) [user] subst_vars(0, _484294, [], _485234)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _484294, [], _485234)
^  Unify: (261) [user] subst_vars(0, _484294, [], _485234)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _484294, [], _485234)
^  Unify: (261) [user] subst_vars(0, _484294, [], _485234)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _484294, [], _485234)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _484296, [], _437614)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _484296, [], _437614)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1264, 0], [1264, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    #[test]", 1264, 0], [";;    #[test]", 1264, 0], [], [])
   Call: (258) [system] compound_name_arguments(_437612, '$COMMENT', [";;    #[test]", 1264, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT', [";;    #[test]", 1264, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1264, 0), '$COMMENT'(";;    #[test]", 1264, 0), [], [])
   Call: (257) [system] _507652=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1264, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1264, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1264, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1264, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1264, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1264, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1264, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1264, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1264, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1265, 0, 45428, '$COMMENT'(";;    fn nop_op() {", 1265, 0), '$stream_position'(45428, 1265, 0, 45428)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _43280))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _43280))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _43280)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _43280)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    fn nop_op() {", 1265, 0), _43280)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    fn nop_op() {", 1265, 0), _43280)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _48892))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _48892))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _48892))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _48892))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _48892)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _48892)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _54478))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _54478))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _54478)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _54478)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    fn nop_op() {", 1265, 0), _54478)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn nop_op() {", 1265, 0), _54478)
   Call: (270) [system] var('$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn nop_op() {", 1265, 0), _54478)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn nop_op() {", 1265, 0), '$VAR'(_61938))
   Call: (270) [system] atom('$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn nop_op() {", 1265, 0), _54478)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn nop_op() {", 1265, 0), _54478)
   Call: (270) [system] '$COMMENT'(";;    fn nop_op() {", 1265, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn nop_op() {", 1265, 0), _54478)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn nop_op() {", 1265, 0), _54478)
   Call: (270) [system] '$COMMENT'(";;    fn nop_op() {", 1265, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn nop_op() {", 1265, 0), _54478)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn nop_op() {", 1265, 0), _54478)
   Call: (270) [system] '$COMMENT'(";;    fn nop_op() {", 1265, 0)==[_71218, _71224]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn nop_op() {", 1265, 0), _54478)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn nop_op() {", 1265, 0), _54478)
   Call: (270) [system] is_list('$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn nop_op() {", 1265, 0), _54478)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn nop_op() {", 1265, 0), _54478)
   Call: (270) [system] string('$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn nop_op() {", 1265, 0), _54478)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn nop_op() {", 1265, 0), _54478)
   Call: (270) [system] compound('$COMMENT'(";;    fn nop_op() {", 1265, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    fn nop_op() {", 1265, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    fn nop_op() {", 1265, 0), _81420, _81422)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT', [";;    fn nop_op() {", 1265, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    fn nop_op() {", 1265, 0], _85162)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn nop_op() {", 1265, 0], _85162)
   Call: (271) [apply] apply:maplist_([";;    fn nop_op() {", 1265, 0], _85162, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    fn nop_op() {", 1265, 0], [_87980|_87982], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    fn nop_op() {", _87980)
^  Unify: (272) [user] mfix_vars1(";;    fn nop_op() {", _87980)
   Call: (273) [system] var(";;    fn nop_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn nop_op() {", _87980)
^  Unify: (272) [user] mfix_vars1(";;    fn nop_op() {", '$VAR'(_92626))
   Call: (273) [system] atom(";;    fn nop_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn nop_op() {", _87980)
^  Unify: (272) [user] mfix_vars1(";;    fn nop_op() {", _87980)
   Call: (273) [system] ";;    fn nop_op() {"==true
^  Redo: (272) [user] mfix_vars1(";;    fn nop_op() {", _87980)
^  Unify: (272) [user] mfix_vars1(";;    fn nop_op() {", _87980)
   Call: (273) [system] ";;    fn nop_op() {"==false
^  Redo: (272) [user] mfix_vars1(";;    fn nop_op() {", _87980)
^  Unify: (272) [user] mfix_vars1(";;    fn nop_op() {", _87980)
   Call: (273) [system] ";;    fn nop_op() {"==[_101906, _101912]
^  Redo: (272) [user] mfix_vars1(";;    fn nop_op() {", _87980)
^  Unify: (272) [user] mfix_vars1(";;    fn nop_op() {", _87980)
   Call: (273) [system] is_list(";;    fn nop_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn nop_op() {", _87980)
^  Unify: (272) [user] mfix_vars1(";;    fn nop_op() {", _87980)
   Call: (273) [system] string(";;    fn nop_op() {")
   Exit: (273) [system] string(";;    fn nop_op() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    fn nop_op() {", _87980)
^  Unify: (272) [user] mfix_vars1(";;    fn nop_op() {", _87980)
   Call: (273) [system] compound(";;    fn nop_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn nop_op() {", _87980)
^  Unify: (272) [user] mfix_vars1(";;    fn nop_op() {", _87980)
^  Call: (273) [user] symbol(";;    fn nop_op() {")
^  Unify: (273) [user] symbol(";;    fn nop_op() {")
   Call: (274) [system] atom(";;    fn nop_op() {")
   Fail: (274) [system] atom(";;    fn nop_op() {")
^  Fail: (273) [user] symbol(";;    fn nop_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn nop_op() {", _87980)
   Call: (273) [system] ";;    fn nop_op() {"=_87980
   Exit: (273) [system] ";;    fn nop_op() {"=";;    fn nop_op() {"
^  Exit: (272) [user] mfix_vars1(";;    fn nop_op() {", ";;    fn nop_op() {")
   Call: (272) [apply] apply:maplist_([1265, 0], _87982, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1265, 0], [_125978|_125980], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1265, _125978)
^  Unify: (273) [user] mfix_vars1(1265, _125978)
   Call: (274) [system] var(1265)
^  Redo: (273) [user] mfix_vars1(1265, _125978)
^  Unify: (273) [user] mfix_vars1(1265, '$VAR'(_130624))
   Call: (274) [system] atom(1265)
^  Redo: (273) [user] mfix_vars1(1265, _125978)
^  Unify: (273) [user] mfix_vars1(1265, _125978)
   Call: (274) [system] 1265==true
^  Redo: (273) [user] mfix_vars1(1265, _125978)
^  Unify: (273) [user] mfix_vars1(1265, _125978)
   Call: (274) [system] 1265==false
^  Redo: (273) [user] mfix_vars1(1265, _125978)
^  Unify: (273) [user] mfix_vars1(1265, _125978)
   Call: (274) [system] 1265==[_139904, _139910]
^  Redo: (273) [user] mfix_vars1(1265, _125978)
^  Unify: (273) [user] mfix_vars1(1265, _125978)
   Call: (274) [system] is_list(1265)
^  Redo: (273) [user] mfix_vars1(1265, _125978)
^  Unify: (273) [user] mfix_vars1(1265, _125978)
   Call: (274) [system] string(1265)
^  Redo: (273) [user] mfix_vars1(1265, _125978)
^  Unify: (273) [user] mfix_vars1(1265, _125978)
   Call: (274) [system] compound(1265)
^  Redo: (273) [user] mfix_vars1(1265, _125978)
^  Unify: (273) [user] mfix_vars1(1265, _125978)
^  Call: (274) [user] symbol(1265)
^  Unify: (274) [user] symbol(1265)
   Call: (275) [system] atom(1265)
   Fail: (275) [system] atom(1265)
^  Fail: (274) [user] symbol(1265)
^  Redo: (273) [user] mfix_vars1(1265, _125978)
   Call: (274) [system] 1265=_125978
   Exit: (274) [system] 1265=1265
^  Exit: (273) [user] mfix_vars1(1265, 1265)
   Call: (273) [apply] apply:maplist_([0], _125980, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_160304|_160306], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _160304)
^  Unify: (274) [user] mfix_vars1(0, _160304)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _160304)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_164950))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _160304)
^  Unify: (274) [user] mfix_vars1(0, _160304)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _160304)
^  Unify: (274) [user] mfix_vars1(0, _160304)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _160304)
^  Unify: (274) [user] mfix_vars1(0, _160304)
   Call: (275) [system] 0==[_174230, _174236]
^  Redo: (274) [user] mfix_vars1(0, _160304)
^  Unify: (274) [user] mfix_vars1(0, _160304)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _160304)
^  Unify: (274) [user] mfix_vars1(0, _160304)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _160304)
^  Unify: (274) [user] mfix_vars1(0, _160304)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _160304)
^  Unify: (274) [user] mfix_vars1(0, _160304)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _160304)
   Call: (275) [system] 0=_160304
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _160306, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1265, 0], [1265, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    fn nop_op() {", 1265, 0], [";;    fn nop_op() {", 1265, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn nop_op() {", 1265, 0], [";;    fn nop_op() {", 1265, 0])
   Call: (270) [system] compound_name_arguments(_54478, '$COMMENT', [";;    fn nop_op() {", 1265, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT', [";;    fn nop_op() {", 1265, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn nop_op() {", 1265, 0)\=@='$COMMENT'(";;    fn nop_op() {", 1265, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _48892)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _210478))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _210478))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _210478))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _210478))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _210478)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _210478)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _216064))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _216064))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _216064)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _216064)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    fn nop_op() {", 1265, 0), _216064)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn nop_op() {", 1265, 0)\=@='$COMMENT'(";;    fn nop_op() {", 1265, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _210478)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _43280))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _43280))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _43280))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _43280))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _43280)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _43280)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _238384))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _238384))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _238384)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _238384)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    fn nop_op() {", 1265, 0), _238384)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn nop_op() {", 1265, 0)\=@='$COMMENT'(";;    fn nop_op() {", 1265, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _43280)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0)))
   Call: (261) [system] '$COMMENT'(";;    fn nop_op() {", 1265, 0)\=@='$COMMENT'(";;    fn nop_op() {", 1265, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn nop_op() {", 1265, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    fn nop_op() {", 1265, 0), _267162, [], _267164)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn nop_op() {", 1265, 0), _267162, [], _267164)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn nop_op() {", 1265, 0), _267162, [], _267164)
   Call: (258) [system] atom('$COMMENT'(";;    fn nop_op() {", 1265, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn nop_op() {", 1265, 0), _267162, [], _267164)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn nop_op() {", 1265, 0), _267162, [], _267164)
   Call: (258) [system] compound('$COMMENT'(";;    fn nop_op() {", 1265, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    fn nop_op() {", 1265, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    fn nop_op() {", 1265, 0), _276478, _276480)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT', [";;    fn nop_op() {", 1265, 0])
^  Call: (258) [user] subst_vars([";;    fn nop_op() {", 1265, 0], _278364, [], _267164)
^  Unify: (258) [user] subst_vars([";;    fn nop_op() {", 1265, 0], [";;    fn nop_op() {", 1265, 0], [], [])
   Call: (259) [system] var([";;    fn nop_op() {", 1265, 0])
^  Redo: (258) [user] subst_vars([";;    fn nop_op() {", 1265, 0], _278364, [], _267164)
^  Unify: (258) [user] subst_vars([";;    fn nop_op() {", 1265, 0], [_282100|_282102], [], _267164)
^  Call: (259) [user] subst_vars(";;    fn nop_op() {", _282100, [], _283040)
^  Unify: (259) [user] subst_vars(";;    fn nop_op() {", ";;    fn nop_op() {", [], [])
   Call: (260) [system] var(";;    fn nop_op() {")
^  Redo: (259) [user] subst_vars(";;    fn nop_op() {", _282100, [], _283040)
^  Unify: (259) [user] subst_vars(";;    fn nop_op() {", _282100, [], _283040)
   Call: (260) [system] atom(";;    fn nop_op() {")
^  Redo: (259) [user] subst_vars(";;    fn nop_op() {", _282100, [], _283040)
^  Unify: (259) [user] subst_vars(";;    fn nop_op() {", _282100, [], _283040)
   Call: (260) [system] compound(";;    fn nop_op() {")
^  Redo: (259) [user] subst_vars(";;    fn nop_op() {", _282100, [], _283040)
^  Unify: (259) [user] subst_vars(";;    fn nop_op() {", ";;    fn nop_op() {", [], [])
^  Exit: (259) [user] subst_vars(";;    fn nop_op() {", ";;    fn nop_op() {", [], [])
^  Call: (259) [user] subst_vars([1265, 0], _282102, [], _267164)
^  Unify: (259) [user] subst_vars([1265, 0], [1265, 0], [], [])
   Call: (260) [system] var([1265, 0])
^  Redo: (259) [user] subst_vars([1265, 0], _282102, [], _267164)
^  Unify: (259) [user] subst_vars([1265, 0], [_297972|_297974], [], _267164)
^  Call: (260) [user] subst_vars(1265, _297972, [], _298912)
^  Unify: (260) [user] subst_vars(1265, 1265, [], [])
   Call: (261) [system] var(1265)
^  Redo: (260) [user] subst_vars(1265, _297972, [], _298912)
^  Unify: (260) [user] subst_vars(1265, _297972, [], _298912)
   Call: (261) [system] atom(1265)
^  Redo: (260) [user] subst_vars(1265, _297972, [], _298912)
^  Unify: (260) [user] subst_vars(1265, _297972, [], _298912)
   Call: (261) [system] compound(1265)
^  Redo: (260) [user] subst_vars(1265, _297972, [], _298912)
^  Unify: (260) [user] subst_vars(1265, 1265, [], [])
^  Exit: (260) [user] subst_vars(1265, 1265, [], [])
^  Call: (260) [user] subst_vars([0], _297974, [], _267164)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _297974, [], _267164)
^  Unify: (260) [user] subst_vars([0], [_313844|_313846], [], _267164)
^  Call: (261) [user] subst_vars(0, _313844, [], _314784)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _313844, [], _314784)
^  Unify: (261) [user] subst_vars(0, _313844, [], _314784)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _313844, [], _314784)
^  Unify: (261) [user] subst_vars(0, _313844, [], _314784)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _313844, [], _314784)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _313846, [], _267164)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _313846, [], _267164)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1265, 0], [1265, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    fn nop_op() {", 1265, 0], [";;    fn nop_op() {", 1265, 0], [], [])
   Call: (258) [system] compound_name_arguments(_267162, '$COMMENT', [";;    fn nop_op() {", 1265, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT', [";;    fn nop_op() {", 1265, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    fn nop_op() {", 1265, 0), '$COMMENT'(";;    fn nop_op() {", 1265, 0), [], [])
   Call: (257) [system] _337202=metta_file_buffer(+, '$COMMENT'(";;    fn nop_op() {", 1265, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    fn nop_op() {", 1265, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    fn nop_op() {", 1265, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn nop_op() {", 1265, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn nop_op() {", 1265, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn nop_op() {", 1265, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn nop_op() {", 1265, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn nop_op() {", 1265, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn nop_op() {", 1265, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1266, 0, 45448, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$stream_position'(45448, 1266, 0, 45448)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _389934))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _389934))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _389934)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _389934)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _389934)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _389934)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _395546))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _395546))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _395546))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _395546))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _395546)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _395546)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _401132))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _401132))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _401132)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _401132)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _401132)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _401132)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _401132)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$VAR'(_408592))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _401132)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _401132)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _401132)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _401132)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _401132)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _401132)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0)==[_417872, _417878]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _401132)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _401132)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _401132)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _401132)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _401132)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _401132)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _428074, _428076)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT', [";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0], _431816)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0], _431816)
   Call: (271) [apply] apply:maplist_([";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0], _431816, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0], [_434634|_434636], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _434634)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _434634)
   Call: (273) [system] var(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _434634)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", '$VAR'(_439280))
   Call: (273) [system] atom(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _434634)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _434634)
   Call: (273) [system] ";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _434634)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _434634)
   Call: (273) [system] ";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _434634)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _434634)
   Call: (273) [system] ";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());"==[_448560, _448566]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _434634)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _434634)
   Call: (273) [system] is_list(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _434634)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _434634)
   Call: (273) [system] string(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());")
   Exit: (273) [system] string(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _434634)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _434634)
   Call: (273) [system] compound(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _434634)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _434634)
^  Call: (273) [user] symbol(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());")
^  Unify: (273) [user] symbol(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());")
   Call: (274) [system] atom(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());")
   Fail: (274) [system] atom(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());")
^  Fail: (273) [user] symbol(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _434634)
   Call: (273) [system] ";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());"=_434634
   Exit: (273) [system] ";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());"=";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", ";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());")
   Call: (272) [apply] apply:maplist_([1266, 0], _434636, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1266, 0], [_472632|_472634], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1266, _472632)
^  Unify: (273) [user] mfix_vars1(1266, _472632)
   Call: (274) [system] var(1266)
^  Redo: (273) [user] mfix_vars1(1266, _472632)
^  Unify: (273) [user] mfix_vars1(1266, '$VAR'(_477278))
   Call: (274) [system] atom(1266)
^  Redo: (273) [user] mfix_vars1(1266, _472632)
^  Unify: (273) [user] mfix_vars1(1266, _472632)
   Call: (274) [system] 1266==true
^  Redo: (273) [user] mfix_vars1(1266, _472632)
^  Unify: (273) [user] mfix_vars1(1266, _472632)
   Call: (274) [system] 1266==false
^  Redo: (273) [user] mfix_vars1(1266, _472632)
^  Unify: (273) [user] mfix_vars1(1266, _472632)
   Call: (274) [system] 1266==[_486558, _486564]
^  Redo: (273) [user] mfix_vars1(1266, _472632)
^  Unify: (273) [user] mfix_vars1(1266, _472632)
   Call: (274) [system] is_list(1266)
^  Redo: (273) [user] mfix_vars1(1266, _472632)
^  Unify: (273) [user] mfix_vars1(1266, _472632)
   Call: (274) [system] string(1266)
^  Redo: (273) [user] mfix_vars1(1266, _472632)
^  Unify: (273) [user] mfix_vars1(1266, _472632)
   Call: (274) [system] compound(1266)
^  Redo: (273) [user] mfix_vars1(1266, _472632)
^  Unify: (273) [user] mfix_vars1(1266, _472632)
^  Call: (274) [user] symbol(1266)
^  Unify: (274) [user] symbol(1266)
   Call: (275) [system] atom(1266)
   Fail: (275) [system] atom(1266)
^  Fail: (274) [user] symbol(1266)
^  Redo: (273) [user] mfix_vars1(1266, _472632)
   Call: (274) [system] 1266=_472632
   Exit: (274) [system] 1266=1266
^  Exit: (273) [user] mfix_vars1(1266, 1266)
   Call: (273) [apply] apply:maplist_([0], _472634, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_506958|_506960], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _506958)
^  Unify: (274) [user] mfix_vars1(0, _506958)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _506958)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_511604))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _506958)
^  Unify: (274) [user] mfix_vars1(0, _506958)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _506958)
^  Unify: (274) [user] mfix_vars1(0, _506958)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _506958)
^  Unify: (274) [user] mfix_vars1(0, _506958)
   Call: (275) [system] 0==[_520884, _520890]
^  Redo: (274) [user] mfix_vars1(0, _506958)
^  Unify: (274) [user] mfix_vars1(0, _506958)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _6050)
^  Unify: (274) [user] mfix_vars1(0, _6050)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _6050)
^  Unify: (274) [user] mfix_vars1(0, _6050)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _6050)
^  Unify: (274) [user] mfix_vars1(0, _6050)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6050)
   Call: (275) [system] 0=_6050
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6052, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1266, 0], [1266, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0], [";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0], [";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0])
   Call: (270) [system] compound_name_arguments(_5992, '$COMMENT', [";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT', [";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0)\=@='$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _5978)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _39248))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _39248))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _39248))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _39248))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _39248)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _39248)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _44834))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _44834))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _44834)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _44834)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _44834)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0)\=@='$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _39248)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _5958))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _5958))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _5958))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _5958))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _5958)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _5958)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _67154))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _67154))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _67154)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _67154)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _67154)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0)\=@='$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _5958)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0)\=@='$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _95932, [], _95934)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _95932, [], _95934)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _95932, [], _95934)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _95932, [], _95934)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _95932, [], _95934)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), _105248, _105250)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT', [";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0], _107134, [], _95934)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0], [";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0], [], [])
   Call: (259) [system] var([";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0], _107134, [], _95934)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0], [_110870|_110872], [], _95934)
^  Call: (259) [user] subst_vars(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _110870, [], _111810)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", ";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", [], [])
   Call: (260) [system] var(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _110870, [], _111810)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _110870, [], _111810)
   Call: (260) [system] atom(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _110870, [], _111810)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _110870, [], _111810)
   Call: (260) [system] compound(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", _110870, [], _111810)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", ";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", ";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", [], [])
^  Call: (259) [user] subst_vars([1266, 0], _110872, [], _95934)
^  Unify: (259) [user] subst_vars([1266, 0], [1266, 0], [], [])
   Call: (260) [system] var([1266, 0])
^  Redo: (259) [user] subst_vars([1266, 0], _110872, [], _95934)
^  Unify: (259) [user] subst_vars([1266, 0], [_126742|_126744], [], _95934)
^  Call: (260) [user] subst_vars(1266, _126742, [], _127682)
^  Unify: (260) [user] subst_vars(1266, 1266, [], [])
   Call: (261) [system] var(1266)
^  Redo: (260) [user] subst_vars(1266, _126742, [], _127682)
^  Unify: (260) [user] subst_vars(1266, _126742, [], _127682)
   Call: (261) [system] atom(1266)
^  Redo: (260) [user] subst_vars(1266, _126742, [], _127682)
^  Unify: (260) [user] subst_vars(1266, _126742, [], _127682)
   Call: (261) [system] compound(1266)
^  Redo: (260) [user] subst_vars(1266, _126742, [], _127682)
^  Unify: (260) [user] subst_vars(1266, 1266, [], [])
^  Exit: (260) [user] subst_vars(1266, 1266, [], [])
^  Call: (260) [user] subst_vars([0], _126744, [], _95934)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _126744, [], _95934)
^  Unify: (260) [user] subst_vars([0], [_142614|_142616], [], _95934)
^  Call: (261) [user] subst_vars(0, _142614, [], _143554)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _142614, [], _143554)
^  Unify: (261) [user] subst_vars(0, _142614, [], _143554)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _142614, [], _143554)
^  Unify: (261) [user] subst_vars(0, _142614, [], _143554)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _142614, [], _143554)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _142616, [], _95934)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _142616, [], _95934)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1266, 0], [1266, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0], [";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0], [], [])
   Call: (258) [system] compound_name_arguments(_95932, '$COMMENT', [";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT', [";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), [], [])
   Call: (257) [system] _165972=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(NopOp{}.execute(&mut vec![]), unit_result());", 1266, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1267, 0, 45515, '$COMMENT'(";;    }", 1267, 0), '$stream_position'(45515, 1267, 0, 45515)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1267, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1267, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    }", 1267, 0), _218690))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1267, 0), _218690))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    }", 1267, 0), _218690)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1267, 0), _218690)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1267, 0), _218690)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1267, 0), _218690)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    }", 1267, 0), _224302))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1267, 0), _224302))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1267, 0), _224302))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1267, 0), _224302))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1267, 0), _224302)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1267, 0), _224302)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    }", 1267, 0), _229888))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1267, 0), _229888))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    }", 1267, 0), _229888)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1267, 0), _229888)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1267, 0), _229888)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1267, 0), _229888)
   Call: (270) [system] var('$COMMENT'(";;    }", 1267, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1267, 0), _229888)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1267, 0), '$VAR'(_237348))
   Call: (270) [system] atom('$COMMENT'(";;    }", 1267, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1267, 0), _229888)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1267, 0), _229888)
   Call: (270) [system] '$COMMENT'(";;    }", 1267, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1267, 0), _229888)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1267, 0), _229888)
   Call: (270) [system] '$COMMENT'(";;    }", 1267, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1267, 0), _229888)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1267, 0), _229888)
   Call: (270) [system] '$COMMENT'(";;    }", 1267, 0)==[_246628, _246634]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1267, 0), _229888)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1267, 0), _229888)
   Call: (270) [system] is_list('$COMMENT'(";;    }", 1267, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1267, 0), _229888)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1267, 0), _229888)
   Call: (270) [system] string('$COMMENT'(";;    }", 1267, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1267, 0), _229888)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1267, 0), _229888)
   Call: (270) [system] compound('$COMMENT'(";;    }", 1267, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    }", 1267, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1267, 0), _256830, _256832)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1267, 0), '$COMMENT', [";;    }", 1267, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    }", 1267, 0], _260572)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1267, 0], _260572)
   Call: (271) [apply] apply:maplist_([";;    }", 1267, 0], _260572, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    }", 1267, 0], [_263390|_263392], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    }", _263390)
^  Unify: (272) [user] mfix_vars1(";;    }", _263390)
   Call: (273) [system] var(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _263390)
^  Unify: (272) [user] mfix_vars1(";;    }", '$VAR'(_268036))
   Call: (273) [system] atom(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _263390)
^  Unify: (272) [user] mfix_vars1(";;    }", _263390)
   Call: (273) [system] ";;    }"==true
^  Redo: (272) [user] mfix_vars1(";;    }", _263390)
^  Unify: (272) [user] mfix_vars1(";;    }", _263390)
   Call: (273) [system] ";;    }"==false
^  Redo: (272) [user] mfix_vars1(";;    }", _263390)
^  Unify: (272) [user] mfix_vars1(";;    }", _263390)
   Call: (273) [system] ";;    }"==[_277316, _277322]
^  Redo: (272) [user] mfix_vars1(";;    }", _263390)
^  Unify: (272) [user] mfix_vars1(";;    }", _263390)
   Call: (273) [system] is_list(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _263390)
^  Unify: (272) [user] mfix_vars1(";;    }", _263390)
   Call: (273) [system] string(";;    }")
   Exit: (273) [system] string(";;    }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    }", _263390)
^  Unify: (272) [user] mfix_vars1(";;    }", _263390)
   Call: (273) [system] compound(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _263390)
^  Unify: (272) [user] mfix_vars1(";;    }", _263390)
^  Call: (273) [user] symbol(";;    }")
^  Unify: (273) [user] symbol(";;    }")
   Call: (274) [system] atom(";;    }")
   Fail: (274) [system] atom(";;    }")
^  Fail: (273) [user] symbol(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _263390)
   Call: (273) [system] ";;    }"=_263390
   Exit: (273) [system] ";;    }"=";;    }"
^  Exit: (272) [user] mfix_vars1(";;    }", ";;    }")
   Call: (272) [apply] apply:maplist_([1267, 0], _263392, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1267, 0], [_301388|_301390], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1267, _301388)
^  Unify: (273) [user] mfix_vars1(1267, _301388)
   Call: (274) [system] var(1267)
^  Redo: (273) [user] mfix_vars1(1267, _301388)
^  Unify: (273) [user] mfix_vars1(1267, '$VAR'(_306034))
   Call: (274) [system] atom(1267)
^  Redo: (273) [user] mfix_vars1(1267, _301388)
^  Unify: (273) [user] mfix_vars1(1267, _301388)
   Call: (274) [system] 1267==true
^  Redo: (273) [user] mfix_vars1(1267, _301388)
^  Unify: (273) [user] mfix_vars1(1267, _301388)
   Call: (274) [system] 1267==false
^  Redo: (273) [user] mfix_vars1(1267, _301388)
^  Unify: (273) [user] mfix_vars1(1267, _301388)
   Call: (274) [system] 1267==[_315314, _315320]
^  Redo: (273) [user] mfix_vars1(1267, _301388)
^  Unify: (273) [user] mfix_vars1(1267, _301388)
   Call: (274) [system] is_list(1267)
^  Redo: (273) [user] mfix_vars1(1267, _301388)
^  Unify: (273) [user] mfix_vars1(1267, _301388)
   Call: (274) [system] string(1267)
^  Redo: (273) [user] mfix_vars1(1267, _301388)
^  Unify: (273) [user] mfix_vars1(1267, _301388)
   Call: (274) [system] compound(1267)
^  Redo: (273) [user] mfix_vars1(1267, _301388)
^  Unify: (273) [user] mfix_vars1(1267, _301388)
^  Call: (274) [user] symbol(1267)
^  Unify: (274) [user] symbol(1267)
   Call: (275) [system] atom(1267)
   Fail: (275) [system] atom(1267)
^  Fail: (274) [user] symbol(1267)
^  Redo: (273) [user] mfix_vars1(1267, _301388)
   Call: (274) [system] 1267=_301388
   Exit: (274) [system] 1267=1267
^  Exit: (273) [user] mfix_vars1(1267, 1267)
   Call: (273) [apply] apply:maplist_([0], _301390, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_335714|_335716], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _335714)
^  Unify: (274) [user] mfix_vars1(0, _335714)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _335714)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_340360))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _335714)
^  Unify: (274) [user] mfix_vars1(0, _335714)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _335714)
^  Unify: (274) [user] mfix_vars1(0, _335714)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _335714)
^  Unify: (274) [user] mfix_vars1(0, _335714)
   Call: (275) [system] 0==[_349640, _349646]
^  Redo: (274) [user] mfix_vars1(0, _335714)
^  Unify: (274) [user] mfix_vars1(0, _335714)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _335714)
^  Unify: (274) [user] mfix_vars1(0, _335714)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _335714)
^  Unify: (274) [user] mfix_vars1(0, _335714)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _335714)
^  Unify: (274) [user] mfix_vars1(0, _335714)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _335714)
   Call: (275) [system] 0=_335714
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _335716, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1267, 0], [1267, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    }", 1267, 0], [";;    }", 1267, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1267, 0], [";;    }", 1267, 0])
   Call: (270) [system] compound_name_arguments(_229888, '$COMMENT', [";;    }", 1267, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1267, 0), '$COMMENT', [";;    }", 1267, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1267, 0)\=@='$COMMENT'(";;    }", 1267, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1267, 0), _224302)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    }", 1267, 0), _385888))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1267, 0), _385888))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1267, 0), _385888))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1267, 0), _385888))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1267, 0), _385888)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1267, 0), _385888)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    }", 1267, 0), _391474))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1267, 0), _391474))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    }", 1267, 0), _391474)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1267, 0), _391474)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    }", 1267, 0), _391474)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1267, 0)\=@='$COMMENT'(";;    }", 1267, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1267, 0), _385888)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    }", 1267, 0), _218690))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1267, 0), _218690))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1267, 0), _218690))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1267, 0), _218690))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1267, 0), _218690)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1267, 0), _218690)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    }", 1267, 0), _413794))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1267, 0), _413794))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    }", 1267, 0), _413794)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1267, 0), _413794)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    }", 1267, 0), _413794)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1267, 0)\=@='$COMMENT'(";;    }", 1267, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1267, 0), _218690)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0)))
   Call: (261) [system] '$COMMENT'(";;    }", 1267, 0)\=@='$COMMENT'(";;    }", 1267, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1267, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1267, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1267, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1267, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1267, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    }", 1267, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    }", 1267, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    }", 1267, 0), _442572, [], _442574)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    }", 1267, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1267, 0), _442572, [], _442574)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1267, 0), _442572, [], _442574)
   Call: (258) [system] atom('$COMMENT'(";;    }", 1267, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1267, 0), _442572, [], _442574)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1267, 0), _442572, [], _442574)
   Call: (258) [system] compound('$COMMENT'(";;    }", 1267, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    }", 1267, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1267, 0), _451888, _451890)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1267, 0), '$COMMENT', [";;    }", 1267, 0])
^  Call: (258) [user] subst_vars([";;    }", 1267, 0], _453774, [], _442574)
^  Unify: (258) [user] subst_vars([";;    }", 1267, 0], [";;    }", 1267, 0], [], [])
   Call: (259) [system] var([";;    }", 1267, 0])
^  Redo: (258) [user] subst_vars([";;    }", 1267, 0], _453774, [], _442574)
^  Unify: (258) [user] subst_vars([";;    }", 1267, 0], [_457510|_457512], [], _442574)
^  Call: (259) [user] subst_vars(";;    }", _457510, [], _458450)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
   Call: (260) [system] var(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _457510, [], _458450)
^  Unify: (259) [user] subst_vars(";;    }", _457510, [], _458450)
   Call: (260) [system] atom(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _457510, [], _458450)
^  Unify: (259) [user] subst_vars(";;    }", _457510, [], _458450)
   Call: (260) [system] compound(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _457510, [], _458450)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Exit: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Call: (259) [user] subst_vars([1267, 0], _457512, [], _442574)
^  Unify: (259) [user] subst_vars([1267, 0], [1267, 0], [], [])
   Call: (260) [system] var([1267, 0])
^  Redo: (259) [user] subst_vars([1267, 0], _457512, [], _442574)
^  Unify: (259) [user] subst_vars([1267, 0], [_473382|_473384], [], _442574)
^  Call: (260) [user] subst_vars(1267, _473382, [], _474322)
^  Unify: (260) [user] subst_vars(1267, 1267, [], [])
   Call: (261) [system] var(1267)
^  Redo: (260) [user] subst_vars(1267, _473382, [], _474322)
^  Unify: (260) [user] subst_vars(1267, _473382, [], _474322)
   Call: (261) [system] atom(1267)
^  Redo: (260) [user] subst_vars(1267, _473382, [], _474322)
^  Unify: (260) [user] subst_vars(1267, _473382, [], _474322)
   Call: (261) [system] compound(1267)
^  Redo: (260) [user] subst_vars(1267, _473382, [], _474322)
^  Unify: (260) [user] subst_vars(1267, 1267, [], [])
^  Exit: (260) [user] subst_vars(1267, 1267, [], [])
^  Call: (260) [user] subst_vars([0], _473384, [], _442574)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _473384, [], _442574)
^  Unify: (260) [user] subst_vars([0], [_489254|_489256], [], _442574)
^  Call: (261) [user] subst_vars(0, _489254, [], _490194)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _489254, [], _490194)
^  Unify: (261) [user] subst_vars(0, _489254, [], _490194)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _489254, [], _490194)
^  Unify: (261) [user] subst_vars(0, _489254, [], _490194)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _489254, [], _490194)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _489256, [], _442574)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _489256, [], _442574)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1267, 0], [1267, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    }", 1267, 0], [";;    }", 1267, 0], [], [])
   Call: (258) [system] compound_name_arguments(_442572, '$COMMENT', [";;    }", 1267, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1267, 0), '$COMMENT', [";;    }", 1267, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    }", 1267, 0), '$COMMENT'(";;    }", 1267, 0), [], [])
   Call: (257) [system] _512612=metta_file_buffer(+, '$COMMENT'(";;    }", 1267, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    }", 1267, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    }", 1267, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1267, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1267, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1267, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1267, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1267, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1267, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1268, 0, 45523, '$COMMENT'(";; Converted:", 1268, 0), '$stream_position'(45523, 1268, 0, 45523)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1268, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1268, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1268, 0), _48150))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1268, 0), _48150))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1268, 0), _48150)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1268, 0), _48150)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1268, 0), _48150)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1268, 0), _48150)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1268, 0), _53762))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1268, 0), _53762))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1268, 0), _53762))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1268, 0), _53762))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1268, 0), _53762)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1268, 0), _53762)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1268, 0), _59348))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1268, 0), _59348))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1268, 0), _59348)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1268, 0), _59348)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1268, 0), _59348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1268, 0), _59348)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1268, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1268, 0), _59348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1268, 0), '$VAR'(_66808))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1268, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1268, 0), _59348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1268, 0), _59348)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1268, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1268, 0), _59348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1268, 0), _59348)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1268, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1268, 0), _59348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1268, 0), _59348)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1268, 0)==[_76088, _76094]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1268, 0), _59348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1268, 0), _59348)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1268, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1268, 0), _59348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1268, 0), _59348)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1268, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1268, 0), _59348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1268, 0), _59348)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1268, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1268, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1268, 0), _86290, _86292)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1268, 0), '$COMMENT', [";; Converted:", 1268, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1268, 0], _90032)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1268, 0], _90032)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1268, 0], _90032, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1268, 0], [_92850|_92852], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _92850)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _92850)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _92850)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_97496))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _92850)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _92850)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _92850)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _92850)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _92850)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _92850)
   Call: (273) [system] ";; Converted:"==[_106776, _106782]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _92850)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _92850)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _92850)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _92850)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _92850)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _92850)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _92850)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _92850)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _92850)
   Call: (273) [system] ";; Converted:"=_92850
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1268, 0], _92852, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1268, 0], [_130848|_130850], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1268, _130848)
^  Unify: (273) [user] mfix_vars1(1268, _130848)
   Call: (274) [system] var(1268)
^  Redo: (273) [user] mfix_vars1(1268, _130848)
^  Unify: (273) [user] mfix_vars1(1268, '$VAR'(_135494))
   Call: (274) [system] atom(1268)
^  Redo: (273) [user] mfix_vars1(1268, _130848)
^  Unify: (273) [user] mfix_vars1(1268, _130848)
   Call: (274) [system] 1268==true
^  Redo: (273) [user] mfix_vars1(1268, _130848)
^  Unify: (273) [user] mfix_vars1(1268, _130848)
   Call: (274) [system] 1268==false
^  Redo: (273) [user] mfix_vars1(1268, _130848)
^  Unify: (273) [user] mfix_vars1(1268, _130848)
   Call: (274) [system] 1268==[_144774, _144780]
^  Redo: (273) [user] mfix_vars1(1268, _130848)
^  Unify: (273) [user] mfix_vars1(1268, _130848)
   Call: (274) [system] is_list(1268)
^  Redo: (273) [user] mfix_vars1(1268, _130848)
^  Unify: (273) [user] mfix_vars1(1268, _130848)
   Call: (274) [system] string(1268)
^  Redo: (273) [user] mfix_vars1(1268, _130848)
^  Unify: (273) [user] mfix_vars1(1268, _130848)
   Call: (274) [system] compound(1268)
^  Redo: (273) [user] mfix_vars1(1268, _130848)
^  Unify: (273) [user] mfix_vars1(1268, _130848)
^  Call: (274) [user] symbol(1268)
^  Unify: (274) [user] symbol(1268)
   Call: (275) [system] atom(1268)
   Fail: (275) [system] atom(1268)
^  Fail: (274) [user] symbol(1268)
^  Redo: (273) [user] mfix_vars1(1268, _130848)
   Call: (274) [system] 1268=_130848
   Exit: (274) [system] 1268=1268
^  Exit: (273) [user] mfix_vars1(1268, 1268)
   Call: (273) [apply] apply:maplist_([0], _130850, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_165174|_165176], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _165174)
^  Unify: (274) [user] mfix_vars1(0, _165174)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _165174)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_169820))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _165174)
^  Unify: (274) [user] mfix_vars1(0, _165174)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _165174)
^  Unify: (274) [user] mfix_vars1(0, _165174)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _165174)
^  Unify: (274) [user] mfix_vars1(0, _165174)
   Call: (275) [system] 0==[_179100, _179106]
^  Redo: (274) [user] mfix_vars1(0, _165174)
^  Unify: (274) [user] mfix_vars1(0, _165174)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _165174)
^  Unify: (274) [user] mfix_vars1(0, _165174)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _165174)
^  Unify: (274) [user] mfix_vars1(0, _165174)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _165174)
^  Unify: (274) [user] mfix_vars1(0, _165174)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _165174)
   Call: (275) [system] 0=_165174
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _165176, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1268, 0], [1268, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1268, 0], [";; Converted:", 1268, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1268, 0], [";; Converted:", 1268, 0])
   Call: (270) [system] compound_name_arguments(_59348, '$COMMENT', [";; Converted:", 1268, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1268, 0), '$COMMENT', [";; Converted:", 1268, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1268, 0)\=@='$COMMENT'(";; Converted:", 1268, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1268, 0), _53762)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1268, 0), _215348))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1268, 0), _215348))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1268, 0), _215348))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1268, 0), _215348))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1268, 0), _215348)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1268, 0), _215348)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1268, 0), _220934))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1268, 0), _220934))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1268, 0), _220934)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1268, 0), _220934)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1268, 0), _220934)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1268, 0)\=@='$COMMENT'(";; Converted:", 1268, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1268, 0), _215348)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1268, 0), _48150))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1268, 0), _48150))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1268, 0), _48150))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1268, 0), _48150))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1268, 0), _48150)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1268, 0), _48150)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1268, 0), _243254))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1268, 0), _243254))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1268, 0), _243254)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1268, 0), _243254)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1268, 0), _243254)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1268, 0)\=@='$COMMENT'(";; Converted:", 1268, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1268, 0), _48150)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1268, 0)\=@='$COMMENT'(";; Converted:", 1268, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1268, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1268, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1268, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1268, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1268, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1268, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1268, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1268, 0), _272032, [], _272034)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1268, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1268, 0), _272032, [], _272034)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1268, 0), _272032, [], _272034)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1268, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1268, 0), _272032, [], _272034)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1268, 0), _272032, [], _272034)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1268, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1268, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1268, 0), _281348, _281350)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1268, 0), '$COMMENT', [";; Converted:", 1268, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1268, 0], _283234, [], _272034)
^  Unify: (258) [user] subst_vars([";; Converted:", 1268, 0], [";; Converted:", 1268, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1268, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1268, 0], _283234, [], _272034)
^  Unify: (258) [user] subst_vars([";; Converted:", 1268, 0], [_286970|_286972], [], _272034)
^  Call: (259) [user] subst_vars(";; Converted:", _286970, [], _287910)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _286970, [], _287910)
^  Unify: (259) [user] subst_vars(";; Converted:", _286970, [], _287910)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _286970, [], _287910)
^  Unify: (259) [user] subst_vars(";; Converted:", _286970, [], _287910)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _286970, [], _287910)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1268, 0], _286972, [], _272034)
^  Unify: (259) [user] subst_vars([1268, 0], [1268, 0], [], [])
   Call: (260) [system] var([1268, 0])
^  Redo: (259) [user] subst_vars([1268, 0], _286972, [], _272034)
^  Unify: (259) [user] subst_vars([1268, 0], [_302842|_302844], [], _272034)
^  Call: (260) [user] subst_vars(1268, _302842, [], _303782)
^  Unify: (260) [user] subst_vars(1268, 1268, [], [])
   Call: (261) [system] var(1268)
^  Redo: (260) [user] subst_vars(1268, _302842, [], _303782)
^  Unify: (260) [user] subst_vars(1268, _302842, [], _303782)
   Call: (261) [system] atom(1268)
^  Redo: (260) [user] subst_vars(1268, _302842, [], _303782)
^  Unify: (260) [user] subst_vars(1268, _302842, [], _303782)
   Call: (261) [system] compound(1268)
^  Redo: (260) [user] subst_vars(1268, _302842, [], _303782)
^  Unify: (260) [user] subst_vars(1268, 1268, [], [])
^  Exit: (260) [user] subst_vars(1268, 1268, [], [])
^  Call: (260) [user] subst_vars([0], _302844, [], _272034)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _302844, [], _272034)
^  Unify: (260) [user] subst_vars([0], [_318714|_318716], [], _272034)
^  Call: (261) [user] subst_vars(0, _318714, [], _319654)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _318714, [], _319654)
^  Unify: (261) [user] subst_vars(0, _318714, [], _319654)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _318714, [], _319654)
^  Unify: (261) [user] subst_vars(0, _318714, [], _319654)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _318714, [], _319654)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _318716, [], _272034)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _318716, [], _272034)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1268, 0], [1268, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1268, 0], [";; Converted:", 1268, 0], [], [])
   Call: (258) [system] compound_name_arguments(_272032, '$COMMENT', [";; Converted:", 1268, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1268, 0), '$COMMENT', [";; Converted:", 1268, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1268, 0), '$COMMENT'(";; Converted:", 1268, 0), [], [])
   Call: (257) [system] _342072=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1268, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1268, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1268, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1268, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1268, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1268, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1268, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1268, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1268, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1271, 0, 45562, '$COMMENT'(";; Original:", 1271, 0), '$stream_position'(45562, 1271, 0, 45562)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1271, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1271, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1271, 0), _394790))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1271, 0), _394790))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1271, 0), _394790)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1271, 0), _394790)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1271, 0), _394790)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1271, 0), _394790)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1271, 0), _400402))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1271, 0), _400402))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1271, 0), _400402))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1271, 0), _400402))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1271, 0), _400402)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1271, 0), _400402)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1271, 0), _405988))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1271, 0), _405988))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1271, 0), _405988)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1271, 0), _405988)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1271, 0), _405988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1271, 0), _405988)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1271, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1271, 0), _405988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1271, 0), '$VAR'(_413448))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1271, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1271, 0), _405988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1271, 0), _405988)
   Call: (270) [system] '$COMMENT'(";; Original:", 1271, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1271, 0), _405988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1271, 0), _405988)
   Call: (270) [system] '$COMMENT'(";; Original:", 1271, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1271, 0), _405988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1271, 0), _405988)
   Call: (270) [system] '$COMMENT'(";; Original:", 1271, 0)==[_422728, _422734]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1271, 0), _405988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1271, 0), _405988)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1271, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1271, 0), _405988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1271, 0), _405988)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1271, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1271, 0), _405988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1271, 0), _405988)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1271, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1271, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1271, 0), _432930, _432932)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1271, 0), '$COMMENT', [";; Original:", 1271, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1271, 0], _436672)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1271, 0], _436672)
   Call: (271) [apply] apply:maplist_([";; Original:", 1271, 0], _436672, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1271, 0], [_439490|_439492], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _439490)
^  Unify: (272) [user] mfix_vars1(";; Original:", _439490)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _439490)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_444136))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _439490)
^  Unify: (272) [user] mfix_vars1(";; Original:", _439490)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _439490)
^  Unify: (272) [user] mfix_vars1(";; Original:", _439490)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _439490)
^  Unify: (272) [user] mfix_vars1(";; Original:", _439490)
   Call: (273) [system] ";; Original:"==[_453416, _453422]
^  Redo: (272) [user] mfix_vars1(";; Original:", _439490)
^  Unify: (272) [user] mfix_vars1(";; Original:", _439490)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _439490)
^  Unify: (272) [user] mfix_vars1(";; Original:", _439490)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _439490)
^  Unify: (272) [user] mfix_vars1(";; Original:", _439490)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _439490)
^  Unify: (272) [user] mfix_vars1(";; Original:", _439490)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _439490)
   Call: (273) [system] ";; Original:"=_439490
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1271, 0], _439492, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1271, 0], [_477488|_477490], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1271, _477488)
^  Unify: (273) [user] mfix_vars1(1271, _477488)
   Call: (274) [system] var(1271)
^  Redo: (273) [user] mfix_vars1(1271, _477488)
^  Unify: (273) [user] mfix_vars1(1271, '$VAR'(_482134))
   Call: (274) [system] atom(1271)
^  Redo: (273) [user] mfix_vars1(1271, _477488)
^  Unify: (273) [user] mfix_vars1(1271, _477488)
   Call: (274) [system] 1271==true
^  Redo: (273) [user] mfix_vars1(1271, _477488)
^  Unify: (273) [user] mfix_vars1(1271, _477488)
   Call: (274) [system] 1271==false
^  Redo: (273) [user] mfix_vars1(1271, _477488)
^  Unify: (273) [user] mfix_vars1(1271, _477488)
   Call: (274) [system] 1271==[_491414, _491420]
^  Redo: (273) [user] mfix_vars1(1271, _477488)
^  Unify: (273) [user] mfix_vars1(1271, _477488)
   Call: (274) [system] is_list(1271)
^  Redo: (273) [user] mfix_vars1(1271, _477488)
^  Unify: (273) [user] mfix_vars1(1271, _477488)
   Call: (274) [system] string(1271)
^  Redo: (273) [user] mfix_vars1(1271, _477488)
^  Unify: (273) [user] mfix_vars1(1271, _477488)
   Call: (274) [system] compound(1271)
^  Redo: (273) [user] mfix_vars1(1271, _477488)
^  Unify: (273) [user] mfix_vars1(1271, _477488)
^  Call: (274) [user] symbol(1271)
^  Unify: (274) [user] symbol(1271)
   Call: (275) [system] atom(1271)
   Fail: (275) [system] atom(1271)
^  Fail: (274) [user] symbol(1271)
^  Redo: (273) [user] mfix_vars1(1271, _477488)
   Call: (274) [system] 1271=_477488
   Exit: (274) [system] 1271=1271
^  Exit: (273) [user] mfix_vars1(1271, 1271)
   Call: (273) [apply] apply:maplist_([0], _477490, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_511814|_511816], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _511814)
^  Unify: (274) [user] mfix_vars1(0, _511814)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _511814)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_516460))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _511814)
^  Unify: (274) [user] mfix_vars1(0, _511814)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _511814)
^  Unify: (274) [user] mfix_vars1(0, _511814)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _6036)
^  Unify: (274) [user] mfix_vars1(0, _6036)
   Call: (275) [system] 0==[_7768, _7774]
^  Redo: (274) [user] mfix_vars1(0, _6036)
^  Unify: (274) [user] mfix_vars1(0, _6036)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _6036)
^  Unify: (274) [user] mfix_vars1(0, _6036)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _6036)
^  Unify: (274) [user] mfix_vars1(0, _6036)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _6036)
^  Unify: (274) [user] mfix_vars1(0, _6036)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6036)
   Call: (275) [system] 0=_6036
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6038, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1271, 0], [1271, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1271, 0], [";; Original:", 1271, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1271, 0], [";; Original:", 1271, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";; Original:", 1271, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1271, 0), '$COMMENT', [";; Original:", 1271, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1271, 0)\=@='$COMMENT'(";; Original:", 1271, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1271, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1271, 0), _44016))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1271, 0), _44016))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1271, 0), _44016))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1271, 0), _44016))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1271, 0), _44016)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1271, 0), _44016)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1271, 0), _49602))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1271, 0), _49602))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1271, 0), _49602)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1271, 0), _49602)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1271, 0), _49602)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1271, 0)\=@='$COMMENT'(";; Original:", 1271, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1271, 0), _44016)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1271, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1271, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1271, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1271, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1271, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1271, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1271, 0), _71922))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1271, 0), _71922))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1271, 0), _71922)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1271, 0), _71922)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1271, 0), _71922)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1271, 0)\=@='$COMMENT'(";; Original:", 1271, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1271, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1271, 0)\=@='$COMMENT'(";; Original:", 1271, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1271, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1271, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1271, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1271, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1271, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1271, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1271, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1271, 0), _100700, [], _100702)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1271, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1271, 0), _100700, [], _100702)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1271, 0), _100700, [], _100702)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1271, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1271, 0), _100700, [], _100702)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1271, 0), _100700, [], _100702)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1271, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1271, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1271, 0), _110016, _110018)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1271, 0), '$COMMENT', [";; Original:", 1271, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1271, 0], _111902, [], _100702)
^  Unify: (258) [user] subst_vars([";; Original:", 1271, 0], [";; Original:", 1271, 0], [], [])
   Call: (259) [system] var([";; Original:", 1271, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1271, 0], _111902, [], _100702)
^  Unify: (258) [user] subst_vars([";; Original:", 1271, 0], [_115638|_115640], [], _100702)
^  Call: (259) [user] subst_vars(";; Original:", _115638, [], _116578)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _115638, [], _116578)
^  Unify: (259) [user] subst_vars(";; Original:", _115638, [], _116578)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _115638, [], _116578)
^  Unify: (259) [user] subst_vars(";; Original:", _115638, [], _116578)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _115638, [], _116578)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1271, 0], _115640, [], _100702)
^  Unify: (259) [user] subst_vars([1271, 0], [1271, 0], [], [])
   Call: (260) [system] var([1271, 0])
^  Redo: (259) [user] subst_vars([1271, 0], _115640, [], _100702)
^  Unify: (259) [user] subst_vars([1271, 0], [_131510|_131512], [], _100702)
^  Call: (260) [user] subst_vars(1271, _131510, [], _132450)
^  Unify: (260) [user] subst_vars(1271, 1271, [], [])
   Call: (261) [system] var(1271)
^  Redo: (260) [user] subst_vars(1271, _131510, [], _132450)
^  Unify: (260) [user] subst_vars(1271, _131510, [], _132450)
   Call: (261) [system] atom(1271)
^  Redo: (260) [user] subst_vars(1271, _131510, [], _132450)
^  Unify: (260) [user] subst_vars(1271, _131510, [], _132450)
   Call: (261) [system] compound(1271)
^  Redo: (260) [user] subst_vars(1271, _131510, [], _132450)
^  Unify: (260) [user] subst_vars(1271, 1271, [], [])
^  Exit: (260) [user] subst_vars(1271, 1271, [], [])
^  Call: (260) [user] subst_vars([0], _131512, [], _100702)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _131512, [], _100702)
^  Unify: (260) [user] subst_vars([0], [_147382|_147384], [], _100702)
^  Call: (261) [user] subst_vars(0, _147382, [], _148322)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _147382, [], _148322)
^  Unify: (261) [user] subst_vars(0, _147382, [], _148322)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _147382, [], _148322)
^  Unify: (261) [user] subst_vars(0, _147382, [], _148322)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _147382, [], _148322)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _147384, [], _100702)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _147384, [], _100702)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1271, 0], [1271, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1271, 0], [";; Original:", 1271, 0], [], [])
   Call: (258) [system] compound_name_arguments(_100700, '$COMMENT', [";; Original:", 1271, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1271, 0), '$COMMENT', [";; Original:", 1271, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1271, 0), '$COMMENT'(";; Original:", 1271, 0), [], [])
   Call: (257) [system] _170740=metta_file_buffer(+, '$COMMENT'(";; Original:", 1271, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1271, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1271, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1271, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1271, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1271, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1271, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1271, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1271, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1272, 0, 45575, '$COMMENT'(";;    #[test]", 1272, 0), '$stream_position'(45575, 1272, 0, 45575)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1272, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1272, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1272, 0), _223458))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1272, 0), _223458))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1272, 0), _223458)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1272, 0), _223458)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1272, 0), _223458)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1272, 0), _223458)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1272, 0), _229070))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1272, 0), _229070))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1272, 0), _229070))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1272, 0), _229070))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1272, 0), _229070)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1272, 0), _229070)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    #[test]", 1272, 0), _234656))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1272, 0), _234656))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    #[test]", 1272, 0), _234656)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1272, 0), _234656)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1272, 0), _234656)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1272, 0), _234656)
   Call: (270) [system] var('$COMMENT'(";;    #[test]", 1272, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1272, 0), _234656)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1272, 0), '$VAR'(_242116))
   Call: (270) [system] atom('$COMMENT'(";;    #[test]", 1272, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1272, 0), _234656)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1272, 0), _234656)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1272, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1272, 0), _234656)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1272, 0), _234656)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1272, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1272, 0), _234656)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1272, 0), _234656)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1272, 0)==[_251396, _251402]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1272, 0), _234656)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1272, 0), _234656)
   Call: (270) [system] is_list('$COMMENT'(";;    #[test]", 1272, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1272, 0), _234656)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1272, 0), _234656)
   Call: (270) [system] string('$COMMENT'(";;    #[test]", 1272, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1272, 0), _234656)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1272, 0), _234656)
   Call: (270) [system] compound('$COMMENT'(";;    #[test]", 1272, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    #[test]", 1272, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1272, 0), _261598, _261600)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT', [";;    #[test]", 1272, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    #[test]", 1272, 0], _265340)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1272, 0], _265340)
   Call: (271) [apply] apply:maplist_([";;    #[test]", 1272, 0], _265340, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    #[test]", 1272, 0], [_268158|_268160], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    #[test]", _268158)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _268158)
   Call: (273) [system] var(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _268158)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", '$VAR'(_272804))
   Call: (273) [system] atom(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _268158)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _268158)
   Call: (273) [system] ";;    #[test]"==true
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _268158)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _268158)
   Call: (273) [system] ";;    #[test]"==false
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _268158)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _268158)
   Call: (273) [system] ";;    #[test]"==[_282084, _282090]
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _268158)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _268158)
   Call: (273) [system] is_list(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _268158)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _268158)
   Call: (273) [system] string(";;    #[test]")
   Exit: (273) [system] string(";;    #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _268158)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _268158)
   Call: (273) [system] compound(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _268158)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _268158)
^  Call: (273) [user] symbol(";;    #[test]")
^  Unify: (273) [user] symbol(";;    #[test]")
   Call: (274) [system] atom(";;    #[test]")
   Fail: (274) [system] atom(";;    #[test]")
^  Fail: (273) [user] symbol(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _268158)
   Call: (273) [system] ";;    #[test]"=_268158
   Exit: (273) [system] ";;    #[test]"=";;    #[test]"
^  Exit: (272) [user] mfix_vars1(";;    #[test]", ";;    #[test]")
   Call: (272) [apply] apply:maplist_([1272, 0], _268160, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1272, 0], [_306156|_306158], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1272, _306156)
^  Unify: (273) [user] mfix_vars1(1272, _306156)
   Call: (274) [system] var(1272)
^  Redo: (273) [user] mfix_vars1(1272, _306156)
^  Unify: (273) [user] mfix_vars1(1272, '$VAR'(_310802))
   Call: (274) [system] atom(1272)
^  Redo: (273) [user] mfix_vars1(1272, _306156)
^  Unify: (273) [user] mfix_vars1(1272, _306156)
   Call: (274) [system] 1272==true
^  Redo: (273) [user] mfix_vars1(1272, _306156)
^  Unify: (273) [user] mfix_vars1(1272, _306156)
   Call: (274) [system] 1272==false
^  Redo: (273) [user] mfix_vars1(1272, _306156)
^  Unify: (273) [user] mfix_vars1(1272, _306156)
   Call: (274) [system] 1272==[_320082, _320088]
^  Redo: (273) [user] mfix_vars1(1272, _306156)
^  Unify: (273) [user] mfix_vars1(1272, _306156)
   Call: (274) [system] is_list(1272)
^  Redo: (273) [user] mfix_vars1(1272, _306156)
^  Unify: (273) [user] mfix_vars1(1272, _306156)
   Call: (274) [system] string(1272)
^  Redo: (273) [user] mfix_vars1(1272, _306156)
^  Unify: (273) [user] mfix_vars1(1272, _306156)
   Call: (274) [system] compound(1272)
^  Redo: (273) [user] mfix_vars1(1272, _306156)
^  Unify: (273) [user] mfix_vars1(1272, _306156)
^  Call: (274) [user] symbol(1272)
^  Unify: (274) [user] symbol(1272)
   Call: (275) [system] atom(1272)
   Fail: (275) [system] atom(1272)
^  Fail: (274) [user] symbol(1272)
^  Redo: (273) [user] mfix_vars1(1272, _306156)
   Call: (274) [system] 1272=_306156
   Exit: (274) [system] 1272=1272
^  Exit: (273) [user] mfix_vars1(1272, 1272)
   Call: (273) [apply] apply:maplist_([0], _306158, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_340482|_340484], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _340482)
^  Unify: (274) [user] mfix_vars1(0, _340482)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _340482)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_345128))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _340482)
^  Unify: (274) [user] mfix_vars1(0, _340482)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _340482)
^  Unify: (274) [user] mfix_vars1(0, _340482)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _340482)
^  Unify: (274) [user] mfix_vars1(0, _340482)
   Call: (275) [system] 0==[_354408, _354414]
^  Redo: (274) [user] mfix_vars1(0, _340482)
^  Unify: (274) [user] mfix_vars1(0, _340482)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _340482)
^  Unify: (274) [user] mfix_vars1(0, _340482)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _340482)
^  Unify: (274) [user] mfix_vars1(0, _340482)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _340482)
^  Unify: (274) [user] mfix_vars1(0, _340482)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _340482)
   Call: (275) [system] 0=_340482
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _340484, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1272, 0], [1272, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    #[test]", 1272, 0], [";;    #[test]", 1272, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1272, 0], [";;    #[test]", 1272, 0])
   Call: (270) [system] compound_name_arguments(_234656, '$COMMENT', [";;    #[test]", 1272, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT', [";;    #[test]", 1272, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1272, 0)\=@='$COMMENT'(";;    #[test]", 1272, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1272, 0), _229070)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    #[test]", 1272, 0), _390656))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1272, 0), _390656))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1272, 0), _390656))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1272, 0), _390656))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1272, 0), _390656)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1272, 0), _390656)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    #[test]", 1272, 0), _396242))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1272, 0), _396242))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    #[test]", 1272, 0), _396242)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1272, 0), _396242)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1272, 0), _396242)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1272, 0)\=@='$COMMENT'(";;    #[test]", 1272, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1272, 0), _390656)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    #[test]", 1272, 0), _223458))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1272, 0), _223458))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1272, 0), _223458))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1272, 0), _223458))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1272, 0), _223458)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1272, 0), _223458)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    #[test]", 1272, 0), _418562))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1272, 0), _418562))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    #[test]", 1272, 0), _418562)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1272, 0), _418562)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1272, 0), _418562)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1272, 0)\=@='$COMMENT'(";;    #[test]", 1272, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1272, 0), _223458)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0)))
   Call: (261) [system] '$COMMENT'(";;    #[test]", 1272, 0)\=@='$COMMENT'(";;    #[test]", 1272, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1272, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1272, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1272, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1272, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1272, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1272, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1272, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1272, 0), _447340, [], _447342)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    #[test]", 1272, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1272, 0), _447340, [], _447342)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1272, 0), _447340, [], _447342)
   Call: (258) [system] atom('$COMMENT'(";;    #[test]", 1272, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1272, 0), _447340, [], _447342)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1272, 0), _447340, [], _447342)
   Call: (258) [system] compound('$COMMENT'(";;    #[test]", 1272, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    #[test]", 1272, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1272, 0), _456656, _456658)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT', [";;    #[test]", 1272, 0])
^  Call: (258) [user] subst_vars([";;    #[test]", 1272, 0], _458542, [], _447342)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1272, 0], [";;    #[test]", 1272, 0], [], [])
   Call: (259) [system] var([";;    #[test]", 1272, 0])
^  Redo: (258) [user] subst_vars([";;    #[test]", 1272, 0], _458542, [], _447342)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1272, 0], [_462278|_462280], [], _447342)
^  Call: (259) [user] subst_vars(";;    #[test]", _462278, [], _463218)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
   Call: (260) [system] var(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _462278, [], _463218)
^  Unify: (259) [user] subst_vars(";;    #[test]", _462278, [], _463218)
   Call: (260) [system] atom(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _462278, [], _463218)
^  Unify: (259) [user] subst_vars(";;    #[test]", _462278, [], _463218)
   Call: (260) [system] compound(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _462278, [], _463218)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Exit: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Call: (259) [user] subst_vars([1272, 0], _462280, [], _447342)
^  Unify: (259) [user] subst_vars([1272, 0], [1272, 0], [], [])
   Call: (260) [system] var([1272, 0])
^  Redo: (259) [user] subst_vars([1272, 0], _462280, [], _447342)
^  Unify: (259) [user] subst_vars([1272, 0], [_478150|_478152], [], _447342)
^  Call: (260) [user] subst_vars(1272, _478150, [], _479090)
^  Unify: (260) [user] subst_vars(1272, 1272, [], [])
   Call: (261) [system] var(1272)
^  Redo: (260) [user] subst_vars(1272, _478150, [], _479090)
^  Unify: (260) [user] subst_vars(1272, _478150, [], _479090)
   Call: (261) [system] atom(1272)
^  Redo: (260) [user] subst_vars(1272, _478150, [], _479090)
^  Unify: (260) [user] subst_vars(1272, _478150, [], _479090)
   Call: (261) [system] compound(1272)
^  Redo: (260) [user] subst_vars(1272, _478150, [], _479090)
^  Unify: (260) [user] subst_vars(1272, 1272, [], [])
^  Exit: (260) [user] subst_vars(1272, 1272, [], [])
^  Call: (260) [user] subst_vars([0], _478152, [], _447342)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _478152, [], _447342)
^  Unify: (260) [user] subst_vars([0], [_494022|_494024], [], _447342)
^  Call: (261) [user] subst_vars(0, _494022, [], _494962)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _494022, [], _494962)
^  Unify: (261) [user] subst_vars(0, _494022, [], _494962)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _494022, [], _494962)
^  Unify: (261) [user] subst_vars(0, _494022, [], _494962)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _494022, [], _494962)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _494024, [], _447342)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _494024, [], _447342)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1272, 0], [1272, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    #[test]", 1272, 0], [";;    #[test]", 1272, 0], [], [])
   Call: (258) [system] compound_name_arguments(_447340, '$COMMENT', [";;    #[test]", 1272, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT', [";;    #[test]", 1272, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1272, 0), '$COMMENT'(";;    #[test]", 1272, 0), [], [])
   Call: (257) [system] _517380=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1272, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1272, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1272, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1272, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1272, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1272, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1272, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1272, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1272, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1273, 0, 45589, '$COMMENT'(";;    fn let_op() {", 1273, 0), '$stream_position'(45589, 1273, 0, 45589)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op() {", 1273, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op() {", 1273, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    fn let_op() {", 1273, 0), _52336))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn let_op() {", 1273, 0), _52336))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    fn let_op() {", 1273, 0), _52336)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn let_op() {", 1273, 0), _52336)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    fn let_op() {", 1273, 0), _52336)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    fn let_op() {", 1273, 0), _52336)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    fn let_op() {", 1273, 0), _57948))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op() {", 1273, 0), _57948))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op() {", 1273, 0), _57948))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op() {", 1273, 0), _57948))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op() {", 1273, 0), _57948)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op() {", 1273, 0), _57948)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    fn let_op() {", 1273, 0), _63534))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn let_op() {", 1273, 0), _63534))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    fn let_op() {", 1273, 0), _63534)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn let_op() {", 1273, 0), _63534)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op() {", 1273, 0), _63534)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op() {", 1273, 0), _63534)
   Call: (270) [system] var('$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op() {", 1273, 0), _63534)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op() {", 1273, 0), '$VAR'(_70994))
   Call: (270) [system] atom('$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op() {", 1273, 0), _63534)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op() {", 1273, 0), _63534)
   Call: (270) [system] '$COMMENT'(";;    fn let_op() {", 1273, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op() {", 1273, 0), _63534)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op() {", 1273, 0), _63534)
   Call: (270) [system] '$COMMENT'(";;    fn let_op() {", 1273, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op() {", 1273, 0), _63534)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op() {", 1273, 0), _63534)
   Call: (270) [system] '$COMMENT'(";;    fn let_op() {", 1273, 0)==[_80274, _80280]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op() {", 1273, 0), _63534)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op() {", 1273, 0), _63534)
   Call: (270) [system] is_list('$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op() {", 1273, 0), _63534)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op() {", 1273, 0), _63534)
   Call: (270) [system] string('$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op() {", 1273, 0), _63534)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op() {", 1273, 0), _63534)
   Call: (270) [system] compound('$COMMENT'(";;    fn let_op() {", 1273, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    fn let_op() {", 1273, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    fn let_op() {", 1273, 0), _90476, _90478)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT', [";;    fn let_op() {", 1273, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    fn let_op() {", 1273, 0], _94218)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn let_op() {", 1273, 0], _94218)
   Call: (271) [apply] apply:maplist_([";;    fn let_op() {", 1273, 0], _94218, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    fn let_op() {", 1273, 0], [_97036|_97038], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    fn let_op() {", _97036)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op() {", _97036)
   Call: (273) [system] var(";;    fn let_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op() {", _97036)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op() {", '$VAR'(_101682))
   Call: (273) [system] atom(";;    fn let_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op() {", _97036)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op() {", _97036)
   Call: (273) [system] ";;    fn let_op() {"==true
^  Redo: (272) [user] mfix_vars1(";;    fn let_op() {", _97036)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op() {", _97036)
   Call: (273) [system] ";;    fn let_op() {"==false
^  Redo: (272) [user] mfix_vars1(";;    fn let_op() {", _97036)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op() {", _97036)
   Call: (273) [system] ";;    fn let_op() {"==[_110962, _110968]
^  Redo: (272) [user] mfix_vars1(";;    fn let_op() {", _97036)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op() {", _97036)
   Call: (273) [system] is_list(";;    fn let_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op() {", _97036)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op() {", _97036)
   Call: (273) [system] string(";;    fn let_op() {")
   Exit: (273) [system] string(";;    fn let_op() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    fn let_op() {", _97036)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op() {", _97036)
   Call: (273) [system] compound(";;    fn let_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op() {", _97036)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op() {", _97036)
^  Call: (273) [user] symbol(";;    fn let_op() {")
^  Unify: (273) [user] symbol(";;    fn let_op() {")
   Call: (274) [system] atom(";;    fn let_op() {")
   Fail: (274) [system] atom(";;    fn let_op() {")
^  Fail: (273) [user] symbol(";;    fn let_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op() {", _97036)
   Call: (273) [system] ";;    fn let_op() {"=_97036
   Exit: (273) [system] ";;    fn let_op() {"=";;    fn let_op() {"
^  Exit: (272) [user] mfix_vars1(";;    fn let_op() {", ";;    fn let_op() {")
   Call: (272) [apply] apply:maplist_([1273, 0], _97038, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1273, 0], [_135034|_135036], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1273, _135034)
^  Unify: (273) [user] mfix_vars1(1273, _135034)
   Call: (274) [system] var(1273)
^  Redo: (273) [user] mfix_vars1(1273, _135034)
^  Unify: (273) [user] mfix_vars1(1273, '$VAR'(_139680))
   Call: (274) [system] atom(1273)
^  Redo: (273) [user] mfix_vars1(1273, _135034)
^  Unify: (273) [user] mfix_vars1(1273, _135034)
   Call: (274) [system] 1273==true
^  Redo: (273) [user] mfix_vars1(1273, _135034)
^  Unify: (273) [user] mfix_vars1(1273, _135034)
   Call: (274) [system] 1273==false
^  Redo: (273) [user] mfix_vars1(1273, _135034)
^  Unify: (273) [user] mfix_vars1(1273, _135034)
   Call: (274) [system] 1273==[_148960, _148966]
^  Redo: (273) [user] mfix_vars1(1273, _135034)
^  Unify: (273) [user] mfix_vars1(1273, _135034)
   Call: (274) [system] is_list(1273)
^  Redo: (273) [user] mfix_vars1(1273, _135034)
^  Unify: (273) [user] mfix_vars1(1273, _135034)
   Call: (274) [system] string(1273)
^  Redo: (273) [user] mfix_vars1(1273, _135034)
^  Unify: (273) [user] mfix_vars1(1273, _135034)
   Call: (274) [system] compound(1273)
^  Redo: (273) [user] mfix_vars1(1273, _135034)
^  Unify: (273) [user] mfix_vars1(1273, _135034)
^  Call: (274) [user] symbol(1273)
^  Unify: (274) [user] symbol(1273)
   Call: (275) [system] atom(1273)
   Fail: (275) [system] atom(1273)
^  Fail: (274) [user] symbol(1273)
^  Redo: (273) [user] mfix_vars1(1273, _135034)
   Call: (274) [system] 1273=_135034
   Exit: (274) [system] 1273=1273
^  Exit: (273) [user] mfix_vars1(1273, 1273)
   Call: (273) [apply] apply:maplist_([0], _135036, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_169360|_169362], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _169360)
^  Unify: (274) [user] mfix_vars1(0, _169360)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _169360)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_174006))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _169360)
^  Unify: (274) [user] mfix_vars1(0, _169360)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _169360)
^  Unify: (274) [user] mfix_vars1(0, _169360)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _169360)
^  Unify: (274) [user] mfix_vars1(0, _169360)
   Call: (275) [system] 0==[_183286, _183292]
^  Redo: (274) [user] mfix_vars1(0, _169360)
^  Unify: (274) [user] mfix_vars1(0, _169360)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _169360)
^  Unify: (274) [user] mfix_vars1(0, _169360)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _169360)
^  Unify: (274) [user] mfix_vars1(0, _169360)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _169360)
^  Unify: (274) [user] mfix_vars1(0, _169360)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _169360)
   Call: (275) [system] 0=_169360
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _169362, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1273, 0], [1273, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    fn let_op() {", 1273, 0], [";;    fn let_op() {", 1273, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn let_op() {", 1273, 0], [";;    fn let_op() {", 1273, 0])
   Call: (270) [system] compound_name_arguments(_63534, '$COMMENT', [";;    fn let_op() {", 1273, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT', [";;    fn let_op() {", 1273, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn let_op() {", 1273, 0)\=@='$COMMENT'(";;    fn let_op() {", 1273, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op() {", 1273, 0), _57948)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    fn let_op() {", 1273, 0), _219534))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op() {", 1273, 0), _219534))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op() {", 1273, 0), _219534))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op() {", 1273, 0), _219534))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op() {", 1273, 0), _219534)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op() {", 1273, 0), _219534)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    fn let_op() {", 1273, 0), _225120))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn let_op() {", 1273, 0), _225120))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    fn let_op() {", 1273, 0), _225120)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn let_op() {", 1273, 0), _225120)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    fn let_op() {", 1273, 0), _225120)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn let_op() {", 1273, 0)\=@='$COMMENT'(";;    fn let_op() {", 1273, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op() {", 1273, 0), _219534)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    fn let_op() {", 1273, 0), _52336))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op() {", 1273, 0), _52336))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op() {", 1273, 0), _52336))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op() {", 1273, 0), _52336))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op() {", 1273, 0), _52336)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op() {", 1273, 0), _52336)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    fn let_op() {", 1273, 0), _247440))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn let_op() {", 1273, 0), _247440))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    fn let_op() {", 1273, 0), _247440)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn let_op() {", 1273, 0), _247440)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    fn let_op() {", 1273, 0), _247440)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn let_op() {", 1273, 0)\=@='$COMMENT'(";;    fn let_op() {", 1273, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op() {", 1273, 0), _52336)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0)))
   Call: (261) [system] '$COMMENT'(";;    fn let_op() {", 1273, 0)\=@='$COMMENT'(";;    fn let_op() {", 1273, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op() {", 1273, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op() {", 1273, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op() {", 1273, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op() {", 1273, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op() {", 1273, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    fn let_op() {", 1273, 0), _276218, [], _276220)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn let_op() {", 1273, 0), _276218, [], _276220)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn let_op() {", 1273, 0), _276218, [], _276220)
   Call: (258) [system] atom('$COMMENT'(";;    fn let_op() {", 1273, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn let_op() {", 1273, 0), _276218, [], _276220)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn let_op() {", 1273, 0), _276218, [], _276220)
   Call: (258) [system] compound('$COMMENT'(";;    fn let_op() {", 1273, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    fn let_op() {", 1273, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    fn let_op() {", 1273, 0), _285534, _285536)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT', [";;    fn let_op() {", 1273, 0])
^  Call: (258) [user] subst_vars([";;    fn let_op() {", 1273, 0], _287420, [], _276220)
^  Unify: (258) [user] subst_vars([";;    fn let_op() {", 1273, 0], [";;    fn let_op() {", 1273, 0], [], [])
   Call: (259) [system] var([";;    fn let_op() {", 1273, 0])
^  Redo: (258) [user] subst_vars([";;    fn let_op() {", 1273, 0], _287420, [], _276220)
^  Unify: (258) [user] subst_vars([";;    fn let_op() {", 1273, 0], [_291156|_291158], [], _276220)
^  Call: (259) [user] subst_vars(";;    fn let_op() {", _291156, [], _292096)
^  Unify: (259) [user] subst_vars(";;    fn let_op() {", ";;    fn let_op() {", [], [])
   Call: (260) [system] var(";;    fn let_op() {")
^  Redo: (259) [user] subst_vars(";;    fn let_op() {", _291156, [], _292096)
^  Unify: (259) [user] subst_vars(";;    fn let_op() {", _291156, [], _292096)
   Call: (260) [system] atom(";;    fn let_op() {")
^  Redo: (259) [user] subst_vars(";;    fn let_op() {", _291156, [], _292096)
^  Unify: (259) [user] subst_vars(";;    fn let_op() {", _291156, [], _292096)
   Call: (260) [system] compound(";;    fn let_op() {")
^  Redo: (259) [user] subst_vars(";;    fn let_op() {", _291156, [], _292096)
^  Unify: (259) [user] subst_vars(";;    fn let_op() {", ";;    fn let_op() {", [], [])
^  Exit: (259) [user] subst_vars(";;    fn let_op() {", ";;    fn let_op() {", [], [])
^  Call: (259) [user] subst_vars([1273, 0], _291158, [], _276220)
^  Unify: (259) [user] subst_vars([1273, 0], [1273, 0], [], [])
   Call: (260) [system] var([1273, 0])
^  Redo: (259) [user] subst_vars([1273, 0], _291158, [], _276220)
^  Unify: (259) [user] subst_vars([1273, 0], [_307028|_307030], [], _276220)
^  Call: (260) [user] subst_vars(1273, _307028, [], _307968)
^  Unify: (260) [user] subst_vars(1273, 1273, [], [])
   Call: (261) [system] var(1273)
^  Redo: (260) [user] subst_vars(1273, _307028, [], _307968)
^  Unify: (260) [user] subst_vars(1273, _307028, [], _307968)
   Call: (261) [system] atom(1273)
^  Redo: (260) [user] subst_vars(1273, _307028, [], _307968)
^  Unify: (260) [user] subst_vars(1273, _307028, [], _307968)
   Call: (261) [system] compound(1273)
^  Redo: (260) [user] subst_vars(1273, _307028, [], _307968)
^  Unify: (260) [user] subst_vars(1273, 1273, [], [])
^  Exit: (260) [user] subst_vars(1273, 1273, [], [])
^  Call: (260) [user] subst_vars([0], _307030, [], _276220)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _307030, [], _276220)
^  Unify: (260) [user] subst_vars([0], [_322900|_322902], [], _276220)
^  Call: (261) [user] subst_vars(0, _322900, [], _323840)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _322900, [], _323840)
^  Unify: (261) [user] subst_vars(0, _322900, [], _323840)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _322900, [], _323840)
^  Unify: (261) [user] subst_vars(0, _322900, [], _323840)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _322900, [], _323840)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _322902, [], _276220)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _322902, [], _276220)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1273, 0], [1273, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    fn let_op() {", 1273, 0], [";;    fn let_op() {", 1273, 0], [], [])
   Call: (258) [system] compound_name_arguments(_276218, '$COMMENT', [";;    fn let_op() {", 1273, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT', [";;    fn let_op() {", 1273, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    fn let_op() {", 1273, 0), '$COMMENT'(";;    fn let_op() {", 1273, 0), [], [])
   Call: (257) [system] _346258=metta_file_buffer(+, '$COMMENT'(";;    fn let_op() {", 1273, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    fn let_op() {", 1273, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    fn let_op() {", 1273, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn let_op() {", 1273, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn let_op() {", 1273, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_op() {", 1273, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_op() {", 1273, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_op() {", 1273, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_op() {", 1273, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1274, 0, 45609, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$stream_position'(45609, 1274, 0, 45609)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _398996))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _398996))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _398996)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _398996)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _398996)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _398996)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _404608))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _404608))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _404608))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _404608))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _404608)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _404608)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _410194))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _410194))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _410194)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _410194)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _410194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _410194)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _410194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$VAR'(_417654))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _410194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _410194)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _410194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _410194)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _410194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _410194)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0)==[_426934, _426940]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _410194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _410194)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _410194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _410194)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _410194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _410194)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _437136, _437138)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0], _440878)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0], _440878)
   Call: (271) [apply] apply:maplist_([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0], _440878, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0], [_443696|_443698], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _443696)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _443696)
   Call: (273) [system] var(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _443696)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", '$VAR'(_448342))
   Call: (273) [system] atom(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _443696)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _443696)
   Call: (273) [system] ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _443696)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _443696)
   Call: (273) [system] ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _443696)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _443696)
   Call: (273) [system] ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),"==[_457622, _457628]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _443696)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _443696)
   Call: (273) [system] is_list(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _443696)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _443696)
   Call: (273) [system] string(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),")
   Exit: (273) [system] string(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _443696)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _443696)
   Call: (273) [system] compound(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _443696)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _443696)
^  Call: (273) [user] symbol(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),")
^  Unify: (273) [user] symbol(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),")
   Call: (274) [system] atom(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),")
   Fail: (274) [system] atom(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),")
^  Fail: (273) [user] symbol(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _443696)
   Call: (273) [system] ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),"=_443696
   Exit: (273) [system] ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),"=";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),")
   Call: (272) [apply] apply:maplist_([1274, 0], _443698, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1274, 0], [_481694|_481696], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1274, _481694)
^  Unify: (273) [user] mfix_vars1(1274, _481694)
   Call: (274) [system] var(1274)
^  Redo: (273) [user] mfix_vars1(1274, _481694)
^  Unify: (273) [user] mfix_vars1(1274, '$VAR'(_486340))
   Call: (274) [system] atom(1274)
^  Redo: (273) [user] mfix_vars1(1274, _481694)
^  Unify: (273) [user] mfix_vars1(1274, _481694)
   Call: (274) [system] 1274==true
^  Redo: (273) [user] mfix_vars1(1274, _481694)
^  Unify: (273) [user] mfix_vars1(1274, _481694)
   Call: (274) [system] 1274==false
^  Redo: (273) [user] mfix_vars1(1274, _481694)
^  Unify: (273) [user] mfix_vars1(1274, _481694)
   Call: (274) [system] 1274==[_495620, _495626]
^  Redo: (273) [user] mfix_vars1(1274, _481694)
^  Unify: (273) [user] mfix_vars1(1274, _481694)
   Call: (274) [system] is_list(1274)
^  Redo: (273) [user] mfix_vars1(1274, _481694)
^  Unify: (273) [user] mfix_vars1(1274, _481694)
   Call: (274) [system] string(1274)
^  Redo: (273) [user] mfix_vars1(1274, _481694)
^  Unify: (273) [user] mfix_vars1(1274, _481694)
   Call: (274) [system] compound(1274)
^  Redo: (273) [user] mfix_vars1(1274, _481694)
^  Unify: (273) [user] mfix_vars1(1274, _481694)
^  Call: (274) [user] symbol(1274)
^  Unify: (274) [user] symbol(1274)
   Call: (275) [system] atom(1274)
   Fail: (275) [system] atom(1274)
^  Fail: (274) [user] symbol(1274)
^  Redo: (273) [user] mfix_vars1(1274, _481694)
   Call: (274) [system] 1274=_481694
   Exit: (274) [system] 1274=1274
^  Exit: (273) [user] mfix_vars1(1274, 1274)
   Call: (273) [apply] apply:maplist_([0], _481696, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_516020|_516022], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _516020)
^  Unify: (274) [user] mfix_vars1(0, _516020)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _516020)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_520666))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _516020)
^  Unify: (274) [user] mfix_vars1(0, _6056)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _6056)
^  Unify: (274) [user] mfix_vars1(0, _6056)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _6056)
^  Unify: (274) [user] mfix_vars1(0, _6056)
   Call: (275) [system] 0==[_12060, _12066]
^  Redo: (274) [user] mfix_vars1(0, _6056)
^  Unify: (274) [user] mfix_vars1(0, _6056)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _6056)
^  Unify: (274) [user] mfix_vars1(0, _6056)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _6056)
^  Unify: (274) [user] mfix_vars1(0, _6056)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _6056)
^  Unify: (274) [user] mfix_vars1(0, _6056)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6056)
   Call: (275) [system] 0=_6056
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6058, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1274, 0], [1274, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0], [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0], [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0])
   Call: (270) [system] compound_name_arguments(_5998, '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0)\=@='$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _5984)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _48308))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _48308))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _48308))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _48308))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _48308)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _48308)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _53894))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _53894))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _53894)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _53894)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _53894)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0)\=@='$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _48308)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _5964))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _5964))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _5964))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _5964))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _5964)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _5964)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _76214))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _76214))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _76214)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _76214)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _76214)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0)\=@='$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _5964)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0)\=@='$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _104992, [], _104994)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _104992, [], _104994)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _104992, [], _104994)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _104992, [], _104994)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _104992, [], _104994)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), _114308, _114310)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0], _116194, [], _104994)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0], [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0], [], [])
   Call: (259) [system] var([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0], _116194, [], _104994)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0], [_119930|_119932], [], _104994)
^  Call: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _119930, [], _120870)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", [], [])
   Call: (260) [system] var(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _119930, [], _120870)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _119930, [], _120870)
   Call: (260) [system] atom(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _119930, [], _120870)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _119930, [], _120870)
   Call: (260) [system] compound(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", _119930, [], _120870)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", [], [])
^  Call: (259) [user] subst_vars([1274, 0], _119932, [], _104994)
^  Unify: (259) [user] subst_vars([1274, 0], [1274, 0], [], [])
   Call: (260) [system] var([1274, 0])
^  Redo: (259) [user] subst_vars([1274, 0], _119932, [], _104994)
^  Unify: (259) [user] subst_vars([1274, 0], [_135802|_135804], [], _104994)
^  Call: (260) [user] subst_vars(1274, _135802, [], _136742)
^  Unify: (260) [user] subst_vars(1274, 1274, [], [])
   Call: (261) [system] var(1274)
^  Redo: (260) [user] subst_vars(1274, _135802, [], _136742)
^  Unify: (260) [user] subst_vars(1274, _135802, [], _136742)
   Call: (261) [system] atom(1274)
^  Redo: (260) [user] subst_vars(1274, _135802, [], _136742)
^  Unify: (260) [user] subst_vars(1274, _135802, [], _136742)
   Call: (261) [system] compound(1274)
^  Redo: (260) [user] subst_vars(1274, _135802, [], _136742)
^  Unify: (260) [user] subst_vars(1274, 1274, [], [])
^  Exit: (260) [user] subst_vars(1274, 1274, [], [])
^  Call: (260) [user] subst_vars([0], _135804, [], _104994)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _135804, [], _104994)
^  Unify: (260) [user] subst_vars([0], [_151674|_151676], [], _104994)
^  Call: (261) [user] subst_vars(0, _151674, [], _152614)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _151674, [], _152614)
^  Unify: (261) [user] subst_vars(0, _151674, [], _152614)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _151674, [], _152614)
^  Unify: (261) [user] subst_vars(0, _151674, [], _152614)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _151674, [], _152614)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _151676, [], _104994)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _151676, [], _104994)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1274, 0], [1274, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0], [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0], [], [])
   Call: (258) [system] compound_name_arguments(_104992, '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), [], [])
   Call: (257) [system] _175032=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(a b), expr!(\"A\" \"B\"), expr!(b a)]),", 1274, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1275, 0, 45698, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$stream_position'(45698, 1275, 0, 45698)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _227758))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _227758))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _227758)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _227758)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _227758)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _227758)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _233370))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _233370))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _233370))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _233370))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _233370)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _233370)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _238956))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _238956))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _238956)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _238956)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _238956)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _238956)
   Call: (270) [system] var('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _238956)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$VAR'(_246416))
   Call: (270) [system] atom('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _238956)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _238956)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _238956)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _238956)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _238956)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _238956)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0)==[_255696, _255702]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _238956)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _238956)
   Call: (270) [system] is_list('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _238956)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _238956)
   Call: (270) [system] string('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _238956)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _238956)
   Call: (270) [system] compound('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _265898, _265900)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT', [";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0], _269640)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0], _269640)
   Call: (271) [apply] apply:maplist_([";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0], _269640, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0], [_272458|_272460], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            Ok(vec![expr!(\"B\" \"A\")]));", _272458)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(\"B\" \"A\")]));", _272458)
   Call: (273) [system] var(";;            Ok(vec![expr!(\"B\" \"A\")]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(\"B\" \"A\")]));", _272458)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(\"B\" \"A\")]));", '$VAR'(_277104))
   Call: (273) [system] atom(";;            Ok(vec![expr!(\"B\" \"A\")]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(\"B\" \"A\")]));", _272458)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(\"B\" \"A\")]));", _272458)
   Call: (273) [system] ";;            Ok(vec![expr!(\"B\" \"A\")]));"==true
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(\"B\" \"A\")]));", _272458)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(\"B\" \"A\")]));", _272458)
   Call: (273) [system] ";;            Ok(vec![expr!(\"B\" \"A\")]));"==false
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(\"B\" \"A\")]));", _272458)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(\"B\" \"A\")]));", _272458)
   Call: (273) [system] ";;            Ok(vec![expr!(\"B\" \"A\")]));"==[_286384, _286390]
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(\"B\" \"A\")]));", _272458)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(\"B\" \"A\")]));", _272458)
   Call: (273) [system] is_list(";;            Ok(vec![expr!(\"B\" \"A\")]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(\"B\" \"A\")]));", _272458)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(\"B\" \"A\")]));", _272458)
   Call: (273) [system] string(";;            Ok(vec![expr!(\"B\" \"A\")]));")
   Exit: (273) [system] string(";;            Ok(vec![expr!(\"B\" \"A\")]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(\"B\" \"A\")]));", _272458)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(\"B\" \"A\")]));", _272458)
   Call: (273) [system] compound(";;            Ok(vec![expr!(\"B\" \"A\")]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(\"B\" \"A\")]));", _272458)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(\"B\" \"A\")]));", _272458)
^  Call: (273) [user] symbol(";;            Ok(vec![expr!(\"B\" \"A\")]));")
^  Unify: (273) [user] symbol(";;            Ok(vec![expr!(\"B\" \"A\")]));")
   Call: (274) [system] atom(";;            Ok(vec![expr!(\"B\" \"A\")]));")
   Fail: (274) [system] atom(";;            Ok(vec![expr!(\"B\" \"A\")]));")
^  Fail: (273) [user] symbol(";;            Ok(vec![expr!(\"B\" \"A\")]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(\"B\" \"A\")]));", _272458)
   Call: (273) [system] ";;            Ok(vec![expr!(\"B\" \"A\")]));"=_272458
   Exit: (273) [system] ";;            Ok(vec![expr!(\"B\" \"A\")]));"=";;            Ok(vec![expr!(\"B\" \"A\")]));"
^  Exit: (272) [user] mfix_vars1(";;            Ok(vec![expr!(\"B\" \"A\")]));", ";;            Ok(vec![expr!(\"B\" \"A\")]));")
   Call: (272) [apply] apply:maplist_([1275, 0], _272460, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1275, 0], [_310456|_310458], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1275, _310456)
^  Unify: (273) [user] mfix_vars1(1275, _310456)
   Call: (274) [system] var(1275)
^  Redo: (273) [user] mfix_vars1(1275, _310456)
^  Unify: (273) [user] mfix_vars1(1275, '$VAR'(_315102))
   Call: (274) [system] atom(1275)
^  Redo: (273) [user] mfix_vars1(1275, _310456)
^  Unify: (273) [user] mfix_vars1(1275, _310456)
   Call: (274) [system] 1275==true
^  Redo: (273) [user] mfix_vars1(1275, _310456)
^  Unify: (273) [user] mfix_vars1(1275, _310456)
   Call: (274) [system] 1275==false
^  Redo: (273) [user] mfix_vars1(1275, _310456)
^  Unify: (273) [user] mfix_vars1(1275, _310456)
   Call: (274) [system] 1275==[_324382, _324388]
^  Redo: (273) [user] mfix_vars1(1275, _310456)
^  Unify: (273) [user] mfix_vars1(1275, _310456)
   Call: (274) [system] is_list(1275)
^  Redo: (273) [user] mfix_vars1(1275, _310456)
^  Unify: (273) [user] mfix_vars1(1275, _310456)
   Call: (274) [system] string(1275)
^  Redo: (273) [user] mfix_vars1(1275, _310456)
^  Unify: (273) [user] mfix_vars1(1275, _310456)
   Call: (274) [system] compound(1275)
^  Redo: (273) [user] mfix_vars1(1275, _310456)
^  Unify: (273) [user] mfix_vars1(1275, _310456)
^  Call: (274) [user] symbol(1275)
^  Unify: (274) [user] symbol(1275)
   Call: (275) [system] atom(1275)
   Fail: (275) [system] atom(1275)
^  Fail: (274) [user] symbol(1275)
^  Redo: (273) [user] mfix_vars1(1275, _310456)
   Call: (274) [system] 1275=_310456
   Exit: (274) [system] 1275=1275
^  Exit: (273) [user] mfix_vars1(1275, 1275)
   Call: (273) [apply] apply:maplist_([0], _310458, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_344782|_344784], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _344782)
^  Unify: (274) [user] mfix_vars1(0, _344782)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _344782)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_349428))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _344782)
^  Unify: (274) [user] mfix_vars1(0, _344782)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _344782)
^  Unify: (274) [user] mfix_vars1(0, _344782)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _344782)
^  Unify: (274) [user] mfix_vars1(0, _344782)
   Call: (275) [system] 0==[_358708, _358714]
^  Redo: (274) [user] mfix_vars1(0, _344782)
^  Unify: (274) [user] mfix_vars1(0, _344782)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _344782)
^  Unify: (274) [user] mfix_vars1(0, _344782)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _344782)
^  Unify: (274) [user] mfix_vars1(0, _344782)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _344782)
^  Unify: (274) [user] mfix_vars1(0, _344782)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _344782)
   Call: (275) [system] 0=_344782
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _344784, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1275, 0], [1275, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0], [";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0], [";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0])
   Call: (270) [system] compound_name_arguments(_238956, '$COMMENT', [";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT', [";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0)\=@='$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _233370)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _394956))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _394956))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _394956))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _394956))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _394956)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _394956)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _400542))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _400542))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _400542)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _400542)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _400542)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0)\=@='$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _394956)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _227758))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _227758))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _227758))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _227758))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _227758)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _227758)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _422862))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _422862))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _422862)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _422862)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _422862)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0)\=@='$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _227758)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0)))
   Call: (261) [system] '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0)\=@='$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _451640, [], _451642)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _451640, [], _451642)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _451640, [], _451642)
   Call: (258) [system] atom('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _451640, [], _451642)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _451640, [], _451642)
   Call: (258) [system] compound('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), _460956, _460958)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT', [";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0])
^  Call: (258) [user] subst_vars([";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0], _462842, [], _451642)
^  Unify: (258) [user] subst_vars([";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0], [";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0], [], [])
   Call: (259) [system] var([";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0])
^  Redo: (258) [user] subst_vars([";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0], _462842, [], _451642)
^  Unify: (258) [user] subst_vars([";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0], [_466578|_466580], [], _451642)
^  Call: (259) [user] subst_vars(";;            Ok(vec![expr!(\"B\" \"A\")]));", _466578, [], _467518)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!(\"B\" \"A\")]));", ";;            Ok(vec![expr!(\"B\" \"A\")]));", [], [])
   Call: (260) [system] var(";;            Ok(vec![expr!(\"B\" \"A\")]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![expr!(\"B\" \"A\")]));", _466578, [], _467518)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!(\"B\" \"A\")]));", _466578, [], _467518)
   Call: (260) [system] atom(";;            Ok(vec![expr!(\"B\" \"A\")]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![expr!(\"B\" \"A\")]));", _466578, [], _467518)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!(\"B\" \"A\")]));", _466578, [], _467518)
   Call: (260) [system] compound(";;            Ok(vec![expr!(\"B\" \"A\")]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![expr!(\"B\" \"A\")]));", _466578, [], _467518)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!(\"B\" \"A\")]));", ";;            Ok(vec![expr!(\"B\" \"A\")]));", [], [])
^  Exit: (259) [user] subst_vars(";;            Ok(vec![expr!(\"B\" \"A\")]));", ";;            Ok(vec![expr!(\"B\" \"A\")]));", [], [])
^  Call: (259) [user] subst_vars([1275, 0], _466580, [], _451642)
^  Unify: (259) [user] subst_vars([1275, 0], [1275, 0], [], [])
   Call: (260) [system] var([1275, 0])
^  Redo: (259) [user] subst_vars([1275, 0], _466580, [], _451642)
^  Unify: (259) [user] subst_vars([1275, 0], [_482450|_482452], [], _451642)
^  Call: (260) [user] subst_vars(1275, _482450, [], _483390)
^  Unify: (260) [user] subst_vars(1275, 1275, [], [])
   Call: (261) [system] var(1275)
^  Redo: (260) [user] subst_vars(1275, _482450, [], _483390)
^  Unify: (260) [user] subst_vars(1275, _482450, [], _483390)
   Call: (261) [system] atom(1275)
^  Redo: (260) [user] subst_vars(1275, _482450, [], _483390)
^  Unify: (260) [user] subst_vars(1275, _482450, [], _483390)
   Call: (261) [system] compound(1275)
^  Redo: (260) [user] subst_vars(1275, _482450, [], _483390)
^  Unify: (260) [user] subst_vars(1275, 1275, [], [])
^  Exit: (260) [user] subst_vars(1275, 1275, [], [])
^  Call: (260) [user] subst_vars([0], _482452, [], _451642)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _482452, [], _451642)
^  Unify: (260) [user] subst_vars([0], [_498322|_498324], [], _451642)
^  Call: (261) [user] subst_vars(0, _498322, [], _499262)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _498322, [], _499262)
^  Unify: (261) [user] subst_vars(0, _498322, [], _499262)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _498322, [], _499262)
^  Unify: (261) [user] subst_vars(0, _498322, [], _499262)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _498322, [], _499262)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _498324, [], _451642)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _498324, [], _451642)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1275, 0], [1275, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0], [";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0], [], [])
   Call: (258) [system] compound_name_arguments(_451640, '$COMMENT', [";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT', [";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), [], [])
   Call: (257) [system] _521680=metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(\"B\" \"A\")]));", 1275, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1276, 0, 45739, '$COMMENT'(";;    }", 1276, 0), '$stream_position'(45739, 1276, 0, 45739)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1276, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1276, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    }", 1276, 0), _56990))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1276, 0), _56990))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    }", 1276, 0), _56990)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1276, 0), _56990)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1276, 0), _56990)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1276, 0), _56990)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    }", 1276, 0), _62602))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1276, 0), _62602))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1276, 0), _62602))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1276, 0), _62602))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1276, 0), _62602)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1276, 0), _62602)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    }", 1276, 0), _68188))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1276, 0), _68188))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    }", 1276, 0), _68188)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1276, 0), _68188)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1276, 0), _68188)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1276, 0), _68188)
   Call: (270) [system] var('$COMMENT'(";;    }", 1276, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1276, 0), _68188)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1276, 0), '$VAR'(_75648))
   Call: (270) [system] atom('$COMMENT'(";;    }", 1276, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1276, 0), _68188)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1276, 0), _68188)
   Call: (270) [system] '$COMMENT'(";;    }", 1276, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1276, 0), _68188)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1276, 0), _68188)
   Call: (270) [system] '$COMMENT'(";;    }", 1276, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1276, 0), _68188)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1276, 0), _68188)
   Call: (270) [system] '$COMMENT'(";;    }", 1276, 0)==[_84928, _84934]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1276, 0), _68188)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1276, 0), _68188)
   Call: (270) [system] is_list('$COMMENT'(";;    }", 1276, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1276, 0), _68188)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1276, 0), _68188)
   Call: (270) [system] string('$COMMENT'(";;    }", 1276, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1276, 0), _68188)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1276, 0), _68188)
   Call: (270) [system] compound('$COMMENT'(";;    }", 1276, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    }", 1276, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1276, 0), _95130, _95132)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1276, 0), '$COMMENT', [";;    }", 1276, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    }", 1276, 0], _98872)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1276, 0], _98872)
   Call: (271) [apply] apply:maplist_([";;    }", 1276, 0], _98872, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    }", 1276, 0], [_101690|_101692], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    }", _101690)
^  Unify: (272) [user] mfix_vars1(";;    }", _101690)
   Call: (273) [system] var(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _101690)
^  Unify: (272) [user] mfix_vars1(";;    }", '$VAR'(_106336))
   Call: (273) [system] atom(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _101690)
^  Unify: (272) [user] mfix_vars1(";;    }", _101690)
   Call: (273) [system] ";;    }"==true
^  Redo: (272) [user] mfix_vars1(";;    }", _101690)
^  Unify: (272) [user] mfix_vars1(";;    }", _101690)
   Call: (273) [system] ";;    }"==false
^  Redo: (272) [user] mfix_vars1(";;    }", _101690)
^  Unify: (272) [user] mfix_vars1(";;    }", _101690)
   Call: (273) [system] ";;    }"==[_115616, _115622]
^  Redo: (272) [user] mfix_vars1(";;    }", _101690)
^  Unify: (272) [user] mfix_vars1(";;    }", _101690)
   Call: (273) [system] is_list(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _101690)
^  Unify: (272) [user] mfix_vars1(";;    }", _101690)
   Call: (273) [system] string(";;    }")
   Exit: (273) [system] string(";;    }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    }", _101690)
^  Unify: (272) [user] mfix_vars1(";;    }", _101690)
   Call: (273) [system] compound(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _101690)
^  Unify: (272) [user] mfix_vars1(";;    }", _101690)
^  Call: (273) [user] symbol(";;    }")
^  Unify: (273) [user] symbol(";;    }")
   Call: (274) [system] atom(";;    }")
   Fail: (274) [system] atom(";;    }")
^  Fail: (273) [user] symbol(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _101690)
   Call: (273) [system] ";;    }"=_101690
   Exit: (273) [system] ";;    }"=";;    }"
^  Exit: (272) [user] mfix_vars1(";;    }", ";;    }")
   Call: (272) [apply] apply:maplist_([1276, 0], _101692, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1276, 0], [_139688|_139690], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1276, _139688)
^  Unify: (273) [user] mfix_vars1(1276, _139688)
   Call: (274) [system] var(1276)
^  Redo: (273) [user] mfix_vars1(1276, _139688)
^  Unify: (273) [user] mfix_vars1(1276, '$VAR'(_144334))
   Call: (274) [system] atom(1276)
^  Redo: (273) [user] mfix_vars1(1276, _139688)
^  Unify: (273) [user] mfix_vars1(1276, _139688)
   Call: (274) [system] 1276==true
^  Redo: (273) [user] mfix_vars1(1276, _139688)
^  Unify: (273) [user] mfix_vars1(1276, _139688)
   Call: (274) [system] 1276==false
^  Redo: (273) [user] mfix_vars1(1276, _139688)
^  Unify: (273) [user] mfix_vars1(1276, _139688)
   Call: (274) [system] 1276==[_153614, _153620]
^  Redo: (273) [user] mfix_vars1(1276, _139688)
^  Unify: (273) [user] mfix_vars1(1276, _139688)
   Call: (274) [system] is_list(1276)
^  Redo: (273) [user] mfix_vars1(1276, _139688)
^  Unify: (273) [user] mfix_vars1(1276, _139688)
   Call: (274) [system] string(1276)
^  Redo: (273) [user] mfix_vars1(1276, _139688)
^  Unify: (273) [user] mfix_vars1(1276, _139688)
   Call: (274) [system] compound(1276)
^  Redo: (273) [user] mfix_vars1(1276, _139688)
^  Unify: (273) [user] mfix_vars1(1276, _139688)
^  Call: (274) [user] symbol(1276)
^  Unify: (274) [user] symbol(1276)
   Call: (275) [system] atom(1276)
   Fail: (275) [system] atom(1276)
^  Fail: (274) [user] symbol(1276)
^  Redo: (273) [user] mfix_vars1(1276, _139688)
   Call: (274) [system] 1276=_139688
   Exit: (274) [system] 1276=1276
^  Exit: (273) [user] mfix_vars1(1276, 1276)
   Call: (273) [apply] apply:maplist_([0], _139690, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_174014|_174016], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _174014)
^  Unify: (274) [user] mfix_vars1(0, _174014)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _174014)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_178660))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _174014)
^  Unify: (274) [user] mfix_vars1(0, _174014)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _174014)
^  Unify: (274) [user] mfix_vars1(0, _174014)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _174014)
^  Unify: (274) [user] mfix_vars1(0, _174014)
   Call: (275) [system] 0==[_187940, _187946]
^  Redo: (274) [user] mfix_vars1(0, _174014)
^  Unify: (274) [user] mfix_vars1(0, _174014)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _174014)
^  Unify: (274) [user] mfix_vars1(0, _174014)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _174014)
^  Unify: (274) [user] mfix_vars1(0, _174014)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _174014)
^  Unify: (274) [user] mfix_vars1(0, _174014)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _174014)
   Call: (275) [system] 0=_174014
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _174016, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1276, 0], [1276, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    }", 1276, 0], [";;    }", 1276, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1276, 0], [";;    }", 1276, 0])
   Call: (270) [system] compound_name_arguments(_68188, '$COMMENT', [";;    }", 1276, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1276, 0), '$COMMENT', [";;    }", 1276, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1276, 0)\=@='$COMMENT'(";;    }", 1276, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1276, 0), _62602)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    }", 1276, 0), _224188))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1276, 0), _224188))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1276, 0), _224188))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1276, 0), _224188))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1276, 0), _224188)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1276, 0), _224188)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    }", 1276, 0), _229774))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1276, 0), _229774))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    }", 1276, 0), _229774)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1276, 0), _229774)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    }", 1276, 0), _229774)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1276, 0)\=@='$COMMENT'(";;    }", 1276, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1276, 0), _224188)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    }", 1276, 0), _56990))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1276, 0), _56990))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1276, 0), _56990))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1276, 0), _56990))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1276, 0), _56990)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1276, 0), _56990)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    }", 1276, 0), _252094))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1276, 0), _252094))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    }", 1276, 0), _252094)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1276, 0), _252094)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    }", 1276, 0), _252094)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1276, 0)\=@='$COMMENT'(";;    }", 1276, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1276, 0), _56990)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0)))
   Call: (261) [system] '$COMMENT'(";;    }", 1276, 0)\=@='$COMMENT'(";;    }", 1276, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1276, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1276, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1276, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1276, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1276, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    }", 1276, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    }", 1276, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    }", 1276, 0), _280872, [], _280874)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    }", 1276, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1276, 0), _280872, [], _280874)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1276, 0), _280872, [], _280874)
   Call: (258) [system] atom('$COMMENT'(";;    }", 1276, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1276, 0), _280872, [], _280874)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1276, 0), _280872, [], _280874)
   Call: (258) [system] compound('$COMMENT'(";;    }", 1276, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    }", 1276, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1276, 0), _290188, _290190)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1276, 0), '$COMMENT', [";;    }", 1276, 0])
^  Call: (258) [user] subst_vars([";;    }", 1276, 0], _292074, [], _280874)
^  Unify: (258) [user] subst_vars([";;    }", 1276, 0], [";;    }", 1276, 0], [], [])
   Call: (259) [system] var([";;    }", 1276, 0])
^  Redo: (258) [user] subst_vars([";;    }", 1276, 0], _292074, [], _280874)
^  Unify: (258) [user] subst_vars([";;    }", 1276, 0], [_295810|_295812], [], _280874)
^  Call: (259) [user] subst_vars(";;    }", _295810, [], _296750)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
   Call: (260) [system] var(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _295810, [], _296750)
^  Unify: (259) [user] subst_vars(";;    }", _295810, [], _296750)
   Call: (260) [system] atom(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _295810, [], _296750)
^  Unify: (259) [user] subst_vars(";;    }", _295810, [], _296750)
   Call: (260) [system] compound(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _295810, [], _296750)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Exit: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Call: (259) [user] subst_vars([1276, 0], _295812, [], _280874)
^  Unify: (259) [user] subst_vars([1276, 0], [1276, 0], [], [])
   Call: (260) [system] var([1276, 0])
^  Redo: (259) [user] subst_vars([1276, 0], _295812, [], _280874)
^  Unify: (259) [user] subst_vars([1276, 0], [_311682|_311684], [], _280874)
^  Call: (260) [user] subst_vars(1276, _311682, [], _312622)
^  Unify: (260) [user] subst_vars(1276, 1276, [], [])
   Call: (261) [system] var(1276)
^  Redo: (260) [user] subst_vars(1276, _311682, [], _312622)
^  Unify: (260) [user] subst_vars(1276, _311682, [], _312622)
   Call: (261) [system] atom(1276)
^  Redo: (260) [user] subst_vars(1276, _311682, [], _312622)
^  Unify: (260) [user] subst_vars(1276, _311682, [], _312622)
   Call: (261) [system] compound(1276)
^  Redo: (260) [user] subst_vars(1276, _311682, [], _312622)
^  Unify: (260) [user] subst_vars(1276, 1276, [], [])
^  Exit: (260) [user] subst_vars(1276, 1276, [], [])
^  Call: (260) [user] subst_vars([0], _311684, [], _280874)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _311684, [], _280874)
^  Unify: (260) [user] subst_vars([0], [_327554|_327556], [], _280874)
^  Call: (261) [user] subst_vars(0, _327554, [], _328494)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _327554, [], _328494)
^  Unify: (261) [user] subst_vars(0, _327554, [], _328494)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _327554, [], _328494)
^  Unify: (261) [user] subst_vars(0, _327554, [], _328494)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _327554, [], _328494)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _327556, [], _280874)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _327556, [], _280874)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1276, 0], [1276, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    }", 1276, 0], [";;    }", 1276, 0], [], [])
   Call: (258) [system] compound_name_arguments(_280872, '$COMMENT', [";;    }", 1276, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1276, 0), '$COMMENT', [";;    }", 1276, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    }", 1276, 0), '$COMMENT'(";;    }", 1276, 0), [], [])
   Call: (257) [system] _350912=metta_file_buffer(+, '$COMMENT'(";;    }", 1276, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    }", 1276, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    }", 1276, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1276, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1276, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1276, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1276, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1276, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1276, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1277, 0, 45747, '$COMMENT'(";; Converted:", 1277, 0), '$stream_position'(45747, 1277, 0, 45747)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1277, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1277, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1277, 0), _403630))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1277, 0), _403630))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1277, 0), _403630)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1277, 0), _403630)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1277, 0), _403630)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1277, 0), _403630)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1277, 0), _409242))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1277, 0), _409242))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1277, 0), _409242))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1277, 0), _409242))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1277, 0), _409242)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1277, 0), _409242)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1277, 0), _414828))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1277, 0), _414828))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1277, 0), _414828)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1277, 0), _414828)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1277, 0), _414828)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1277, 0), _414828)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1277, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1277, 0), _414828)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1277, 0), '$VAR'(_422288))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1277, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1277, 0), _414828)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1277, 0), _414828)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1277, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1277, 0), _414828)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1277, 0), _414828)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1277, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1277, 0), _414828)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1277, 0), _414828)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1277, 0)==[_431568, _431574]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1277, 0), _414828)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1277, 0), _414828)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1277, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1277, 0), _414828)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1277, 0), _414828)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1277, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1277, 0), _414828)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1277, 0), _414828)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1277, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1277, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1277, 0), _441770, _441772)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1277, 0), '$COMMENT', [";; Converted:", 1277, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1277, 0], _445512)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1277, 0], _445512)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1277, 0], _445512, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1277, 0], [_448330|_448332], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _448330)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _448330)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _448330)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_452976))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _448330)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _448330)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _448330)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _448330)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _448330)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _448330)
   Call: (273) [system] ";; Converted:"==[_462256, _462262]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _448330)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _448330)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _448330)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _448330)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _448330)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _448330)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _448330)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _448330)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _448330)
   Call: (273) [system] ";; Converted:"=_448330
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1277, 0], _448332, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1277, 0], [_486328|_486330], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1277, _486328)
^  Unify: (273) [user] mfix_vars1(1277, _486328)
   Call: (274) [system] var(1277)
^  Redo: (273) [user] mfix_vars1(1277, _486328)
^  Unify: (273) [user] mfix_vars1(1277, '$VAR'(_490974))
   Call: (274) [system] atom(1277)
^  Redo: (273) [user] mfix_vars1(1277, _486328)
^  Unify: (273) [user] mfix_vars1(1277, _486328)
   Call: (274) [system] 1277==true
^  Redo: (273) [user] mfix_vars1(1277, _486328)
^  Unify: (273) [user] mfix_vars1(1277, _486328)
   Call: (274) [system] 1277==false
^  Redo: (273) [user] mfix_vars1(1277, _486328)
^  Unify: (273) [user] mfix_vars1(1277, _486328)
   Call: (274) [system] 1277==[_500254, _500260]
^  Redo: (273) [user] mfix_vars1(1277, _486328)
^  Unify: (273) [user] mfix_vars1(1277, _486328)
   Call: (274) [system] is_list(1277)
^  Redo: (273) [user] mfix_vars1(1277, _486328)
^  Unify: (273) [user] mfix_vars1(1277, _486328)
   Call: (274) [system] string(1277)
^  Redo: (273) [user] mfix_vars1(1277, _486328)
^  Unify: (273) [user] mfix_vars1(1277, _486328)
   Call: (274) [system] compound(1277)
^  Redo: (273) [user] mfix_vars1(1277, _486328)
^  Unify: (273) [user] mfix_vars1(1277, _486328)
^  Call: (274) [user] symbol(1277)
^  Unify: (274) [user] symbol(1277)
   Call: (275) [system] atom(1277)
   Fail: (275) [system] atom(1277)
^  Fail: (274) [user] symbol(1277)
^  Redo: (273) [user] mfix_vars1(1277, _486328)
   Call: (274) [system] 1277=_486328
   Exit: (274) [system] 1277=1277
^  Exit: (273) [user] mfix_vars1(1277, 1277)
   Call: (273) [apply] apply:maplist_([0], _486330, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_520654|_520656], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _520654)
^  Unify: (274) [user] mfix_vars1(0, _520654)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _6036)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_7398))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _6036)
^  Unify: (274) [user] mfix_vars1(0, _6036)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _6036)
^  Unify: (274) [user] mfix_vars1(0, _6036)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _6036)
^  Unify: (274) [user] mfix_vars1(0, _6036)
   Call: (275) [system] 0==[_16678, _16684]
^  Redo: (274) [user] mfix_vars1(0, _6036)
^  Unify: (274) [user] mfix_vars1(0, _6036)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _6036)
^  Unify: (274) [user] mfix_vars1(0, _6036)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _6036)
^  Unify: (274) [user] mfix_vars1(0, _6036)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _6036)
^  Unify: (274) [user] mfix_vars1(0, _6036)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6036)
   Call: (275) [system] 0=_6036
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6038, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1277, 0], [1277, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1277, 0], [";; Converted:", 1277, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1277, 0], [";; Converted:", 1277, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";; Converted:", 1277, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1277, 0), '$COMMENT', [";; Converted:", 1277, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1277, 0)\=@='$COMMENT'(";; Converted:", 1277, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1277, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1277, 0), _52926))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1277, 0), _52926))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1277, 0), _52926))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1277, 0), _52926))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1277, 0), _52926)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1277, 0), _52926)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1277, 0), _58512))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1277, 0), _58512))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1277, 0), _58512)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1277, 0), _58512)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1277, 0), _58512)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1277, 0)\=@='$COMMENT'(";; Converted:", 1277, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1277, 0), _52926)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1277, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1277, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1277, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1277, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1277, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1277, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1277, 0), _80832))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1277, 0), _80832))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1277, 0), _80832)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1277, 0), _80832)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1277, 0), _80832)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1277, 0)\=@='$COMMENT'(";; Converted:", 1277, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1277, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1277, 0)\=@='$COMMENT'(";; Converted:", 1277, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1277, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1277, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1277, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1277, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1277, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1277, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1277, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1277, 0), _109610, [], _109612)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1277, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1277, 0), _109610, [], _109612)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1277, 0), _109610, [], _109612)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1277, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1277, 0), _109610, [], _109612)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1277, 0), _109610, [], _109612)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1277, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1277, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1277, 0), _118926, _118928)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1277, 0), '$COMMENT', [";; Converted:", 1277, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1277, 0], _120812, [], _109612)
^  Unify: (258) [user] subst_vars([";; Converted:", 1277, 0], [";; Converted:", 1277, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1277, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1277, 0], _120812, [], _109612)
^  Unify: (258) [user] subst_vars([";; Converted:", 1277, 0], [_124548|_124550], [], _109612)
^  Call: (259) [user] subst_vars(";; Converted:", _124548, [], _125488)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _124548, [], _125488)
^  Unify: (259) [user] subst_vars(";; Converted:", _124548, [], _125488)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _124548, [], _125488)
^  Unify: (259) [user] subst_vars(";; Converted:", _124548, [], _125488)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _124548, [], _125488)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1277, 0], _124550, [], _109612)
^  Unify: (259) [user] subst_vars([1277, 0], [1277, 0], [], [])
   Call: (260) [system] var([1277, 0])
^  Redo: (259) [user] subst_vars([1277, 0], _124550, [], _109612)
^  Unify: (259) [user] subst_vars([1277, 0], [_140420|_140422], [], _109612)
^  Call: (260) [user] subst_vars(1277, _140420, [], _141360)
^  Unify: (260) [user] subst_vars(1277, 1277, [], [])
   Call: (261) [system] var(1277)
^  Redo: (260) [user] subst_vars(1277, _140420, [], _141360)
^  Unify: (260) [user] subst_vars(1277, _140420, [], _141360)
   Call: (261) [system] atom(1277)
^  Redo: (260) [user] subst_vars(1277, _140420, [], _141360)
^  Unify: (260) [user] subst_vars(1277, _140420, [], _141360)
   Call: (261) [system] compound(1277)
^  Redo: (260) [user] subst_vars(1277, _140420, [], _141360)
^  Unify: (260) [user] subst_vars(1277, 1277, [], [])
^  Exit: (260) [user] subst_vars(1277, 1277, [], [])
^  Call: (260) [user] subst_vars([0], _140422, [], _109612)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _140422, [], _109612)
^  Unify: (260) [user] subst_vars([0], [_156292|_156294], [], _109612)
^  Call: (261) [user] subst_vars(0, _156292, [], _157232)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _156292, [], _157232)
^  Unify: (261) [user] subst_vars(0, _156292, [], _157232)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _156292, [], _157232)
^  Unify: (261) [user] subst_vars(0, _156292, [], _157232)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _156292, [], _157232)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _156294, [], _109612)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _156294, [], _109612)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1277, 0], [1277, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1277, 0], [";; Converted:", 1277, 0], [], [])
   Call: (258) [system] compound_name_arguments(_109610, '$COMMENT', [";; Converted:", 1277, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1277, 0), '$COMMENT', [";; Converted:", 1277, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1277, 0), '$COMMENT'(";; Converted:", 1277, 0), [], [])
   Call: (257) [system] _179650=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1277, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1277, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1277, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1277, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1277, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1277, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1277, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1277, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1277, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1280, 0, 45811, '$COMMENT'(";; Original:", 1280, 0), '$stream_position'(45811, 1280, 0, 45811)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1280, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1280, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1280, 0), _232368))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1280, 0), _232368))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1280, 0), _232368)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1280, 0), _232368)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1280, 0), _232368)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1280, 0), _232368)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1280, 0), _237980))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1280, 0), _237980))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1280, 0), _237980))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1280, 0), _237980))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1280, 0), _237980)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1280, 0), _237980)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1280, 0), _243566))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1280, 0), _243566))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1280, 0), _243566)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1280, 0), _243566)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1280, 0), _243566)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1280, 0), _243566)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1280, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1280, 0), _243566)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1280, 0), '$VAR'(_251026))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1280, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1280, 0), _243566)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1280, 0), _243566)
   Call: (270) [system] '$COMMENT'(";; Original:", 1280, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1280, 0), _243566)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1280, 0), _243566)
   Call: (270) [system] '$COMMENT'(";; Original:", 1280, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1280, 0), _243566)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1280, 0), _243566)
   Call: (270) [system] '$COMMENT'(";; Original:", 1280, 0)==[_260306, _260312]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1280, 0), _243566)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1280, 0), _243566)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1280, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1280, 0), _243566)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1280, 0), _243566)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1280, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1280, 0), _243566)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1280, 0), _243566)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1280, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1280, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1280, 0), _270508, _270510)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1280, 0), '$COMMENT', [";; Original:", 1280, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1280, 0], _274250)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1280, 0], _274250)
   Call: (271) [apply] apply:maplist_([";; Original:", 1280, 0], _274250, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1280, 0], [_277068|_277070], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _277068)
^  Unify: (272) [user] mfix_vars1(";; Original:", _277068)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _277068)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_281714))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _277068)
^  Unify: (272) [user] mfix_vars1(";; Original:", _277068)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _277068)
^  Unify: (272) [user] mfix_vars1(";; Original:", _277068)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _277068)
^  Unify: (272) [user] mfix_vars1(";; Original:", _277068)
   Call: (273) [system] ";; Original:"==[_290994, _291000]
^  Redo: (272) [user] mfix_vars1(";; Original:", _277068)
^  Unify: (272) [user] mfix_vars1(";; Original:", _277068)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _277068)
^  Unify: (272) [user] mfix_vars1(";; Original:", _277068)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _277068)
^  Unify: (272) [user] mfix_vars1(";; Original:", _277068)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _277068)
^  Unify: (272) [user] mfix_vars1(";; Original:", _277068)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _277068)
   Call: (273) [system] ";; Original:"=_277068
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1280, 0], _277070, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1280, 0], [_315066|_315068], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1280, _315066)
^  Unify: (273) [user] mfix_vars1(1280, _315066)
   Call: (274) [system] var(1280)
^  Redo: (273) [user] mfix_vars1(1280, _315066)
^  Unify: (273) [user] mfix_vars1(1280, '$VAR'(_319712))
   Call: (274) [system] atom(1280)
^  Redo: (273) [user] mfix_vars1(1280, _315066)
^  Unify: (273) [user] mfix_vars1(1280, _315066)
   Call: (274) [system] 1280==true
^  Redo: (273) [user] mfix_vars1(1280, _315066)
^  Unify: (273) [user] mfix_vars1(1280, _315066)
   Call: (274) [system] 1280==false
^  Redo: (273) [user] mfix_vars1(1280, _315066)
^  Unify: (273) [user] mfix_vars1(1280, _315066)
   Call: (274) [system] 1280==[_328992, _328998]
^  Redo: (273) [user] mfix_vars1(1280, _315066)
^  Unify: (273) [user] mfix_vars1(1280, _315066)
   Call: (274) [system] is_list(1280)
^  Redo: (273) [user] mfix_vars1(1280, _315066)
^  Unify: (273) [user] mfix_vars1(1280, _315066)
   Call: (274) [system] string(1280)
^  Redo: (273) [user] mfix_vars1(1280, _315066)
^  Unify: (273) [user] mfix_vars1(1280, _315066)
   Call: (274) [system] compound(1280)
^  Redo: (273) [user] mfix_vars1(1280, _315066)
^  Unify: (273) [user] mfix_vars1(1280, _315066)
^  Call: (274) [user] symbol(1280)
^  Unify: (274) [user] symbol(1280)
   Call: (275) [system] atom(1280)
   Fail: (275) [system] atom(1280)
^  Fail: (274) [user] symbol(1280)
^  Redo: (273) [user] mfix_vars1(1280, _315066)
   Call: (274) [system] 1280=_315066
   Exit: (274) [system] 1280=1280
^  Exit: (273) [user] mfix_vars1(1280, 1280)
   Call: (273) [apply] apply:maplist_([0], _315068, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_349392|_349394], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _349392)
^  Unify: (274) [user] mfix_vars1(0, _349392)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _349392)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_354038))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _349392)
^  Unify: (274) [user] mfix_vars1(0, _349392)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _349392)
^  Unify: (274) [user] mfix_vars1(0, _349392)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _349392)
^  Unify: (274) [user] mfix_vars1(0, _349392)
   Call: (275) [system] 0==[_363318, _363324]
^  Redo: (274) [user] mfix_vars1(0, _349392)
^  Unify: (274) [user] mfix_vars1(0, _349392)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _349392)
^  Unify: (274) [user] mfix_vars1(0, _349392)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _349392)
^  Unify: (274) [user] mfix_vars1(0, _349392)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _349392)
^  Unify: (274) [user] mfix_vars1(0, _349392)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _349392)
   Call: (275) [system] 0=_349392
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _349394, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1280, 0], [1280, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1280, 0], [";; Original:", 1280, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1280, 0], [";; Original:", 1280, 0])
   Call: (270) [system] compound_name_arguments(_243566, '$COMMENT', [";; Original:", 1280, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1280, 0), '$COMMENT', [";; Original:", 1280, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1280, 0)\=@='$COMMENT'(";; Original:", 1280, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1280, 0), _237980)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1280, 0), _399566))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1280, 0), _399566))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1280, 0), _399566))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1280, 0), _399566))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1280, 0), _399566)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1280, 0), _399566)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1280, 0), _405152))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1280, 0), _405152))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1280, 0), _405152)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1280, 0), _405152)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1280, 0), _405152)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1280, 0)\=@='$COMMENT'(";; Original:", 1280, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1280, 0), _399566)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1280, 0), _232368))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1280, 0), _232368))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1280, 0), _232368))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1280, 0), _232368))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1280, 0), _232368)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1280, 0), _232368)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1280, 0), _427472))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1280, 0), _427472))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1280, 0), _427472)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1280, 0), _427472)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1280, 0), _427472)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1280, 0)\=@='$COMMENT'(";; Original:", 1280, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1280, 0), _232368)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1280, 0)\=@='$COMMENT'(";; Original:", 1280, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1280, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1280, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1280, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1280, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1280, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1280, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1280, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1280, 0), _456250, [], _456252)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1280, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1280, 0), _456250, [], _456252)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1280, 0), _456250, [], _456252)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1280, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1280, 0), _456250, [], _456252)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1280, 0), _456250, [], _456252)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1280, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1280, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1280, 0), _465566, _465568)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1280, 0), '$COMMENT', [";; Original:", 1280, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1280, 0], _467452, [], _456252)
^  Unify: (258) [user] subst_vars([";; Original:", 1280, 0], [";; Original:", 1280, 0], [], [])
   Call: (259) [system] var([";; Original:", 1280, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1280, 0], _467452, [], _456252)
^  Unify: (258) [user] subst_vars([";; Original:", 1280, 0], [_471188|_471190], [], _456252)
^  Call: (259) [user] subst_vars(";; Original:", _471188, [], _472128)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _471188, [], _472128)
^  Unify: (259) [user] subst_vars(";; Original:", _471188, [], _472128)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _471188, [], _472128)
^  Unify: (259) [user] subst_vars(";; Original:", _471188, [], _472128)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _471188, [], _472128)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1280, 0], _471190, [], _456252)
^  Unify: (259) [user] subst_vars([1280, 0], [1280, 0], [], [])
   Call: (260) [system] var([1280, 0])
^  Redo: (259) [user] subst_vars([1280, 0], _471190, [], _456252)
^  Unify: (259) [user] subst_vars([1280, 0], [_487060|_487062], [], _456252)
^  Call: (260) [user] subst_vars(1280, _487060, [], _488000)
^  Unify: (260) [user] subst_vars(1280, 1280, [], [])
   Call: (261) [system] var(1280)
^  Redo: (260) [user] subst_vars(1280, _487060, [], _488000)
^  Unify: (260) [user] subst_vars(1280, _487060, [], _488000)
   Call: (261) [system] atom(1280)
^  Redo: (260) [user] subst_vars(1280, _487060, [], _488000)
^  Unify: (260) [user] subst_vars(1280, _487060, [], _488000)
   Call: (261) [system] compound(1280)
^  Redo: (260) [user] subst_vars(1280, _487060, [], _488000)
^  Unify: (260) [user] subst_vars(1280, 1280, [], [])
^  Exit: (260) [user] subst_vars(1280, 1280, [], [])
^  Call: (260) [user] subst_vars([0], _487062, [], _456252)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _487062, [], _456252)
^  Unify: (260) [user] subst_vars([0], [_502932|_502934], [], _456252)
^  Call: (261) [user] subst_vars(0, _502932, [], _503872)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _502932, [], _503872)
^  Unify: (261) [user] subst_vars(0, _502932, [], _503872)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _502932, [], _503872)
^  Unify: (261) [user] subst_vars(0, _502932, [], _503872)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _502932, [], _503872)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _502934, [], _456252)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _502934, [], _456252)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1280, 0], [1280, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1280, 0], [";; Original:", 1280, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5938, '$COMMENT', [";; Original:", 1280, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1280, 0), '$COMMENT', [";; Original:", 1280, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1280, 0), '$COMMENT'(";; Original:", 1280, 0), [], [])
   Call: (257) [system] _8388=metta_file_buffer(+, '$COMMENT'(";; Original:", 1280, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1280, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1280, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1280, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1280, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1280, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1280, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1280, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1280, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1281, 0, 45824, '$COMMENT'(";;    #[test]", 1281, 0), '$stream_position'(45824, 1281, 0, 45824)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1281, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1281, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1281, 0), _61106))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1281, 0), _61106))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1281, 0), _61106)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1281, 0), _61106)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1281, 0), _61106)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1281, 0), _61106)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1281, 0), _66718))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1281, 0), _66718))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1281, 0), _66718))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1281, 0), _66718))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1281, 0), _66718)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1281, 0), _66718)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    #[test]", 1281, 0), _72304))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1281, 0), _72304))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    #[test]", 1281, 0), _72304)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1281, 0), _72304)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1281, 0), _72304)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1281, 0), _72304)
   Call: (270) [system] var('$COMMENT'(";;    #[test]", 1281, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1281, 0), _72304)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1281, 0), '$VAR'(_79764))
   Call: (270) [system] atom('$COMMENT'(";;    #[test]", 1281, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1281, 0), _72304)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1281, 0), _72304)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1281, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1281, 0), _72304)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1281, 0), _72304)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1281, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1281, 0), _72304)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1281, 0), _72304)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1281, 0)==[_89044, _89050]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1281, 0), _72304)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1281, 0), _72304)
   Call: (270) [system] is_list('$COMMENT'(";;    #[test]", 1281, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1281, 0), _72304)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1281, 0), _72304)
   Call: (270) [system] string('$COMMENT'(";;    #[test]", 1281, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1281, 0), _72304)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1281, 0), _72304)
   Call: (270) [system] compound('$COMMENT'(";;    #[test]", 1281, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    #[test]", 1281, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1281, 0), _99246, _99248)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT', [";;    #[test]", 1281, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    #[test]", 1281, 0], _102988)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1281, 0], _102988)
   Call: (271) [apply] apply:maplist_([";;    #[test]", 1281, 0], _102988, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    #[test]", 1281, 0], [_105806|_105808], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    #[test]", _105806)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _105806)
   Call: (273) [system] var(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _105806)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", '$VAR'(_110452))
   Call: (273) [system] atom(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _105806)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _105806)
   Call: (273) [system] ";;    #[test]"==true
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _105806)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _105806)
   Call: (273) [system] ";;    #[test]"==false
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _105806)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _105806)
   Call: (273) [system] ";;    #[test]"==[_119732, _119738]
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _105806)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _105806)
   Call: (273) [system] is_list(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _105806)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _105806)
   Call: (273) [system] string(";;    #[test]")
   Exit: (273) [system] string(";;    #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _105806)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _105806)
   Call: (273) [system] compound(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _105806)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _105806)
^  Call: (273) [user] symbol(";;    #[test]")
^  Unify: (273) [user] symbol(";;    #[test]")
   Call: (274) [system] atom(";;    #[test]")
   Fail: (274) [system] atom(";;    #[test]")
^  Fail: (273) [user] symbol(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _105806)
   Call: (273) [system] ";;    #[test]"=_105806
   Exit: (273) [system] ";;    #[test]"=";;    #[test]"
^  Exit: (272) [user] mfix_vars1(";;    #[test]", ";;    #[test]")
   Call: (272) [apply] apply:maplist_([1281, 0], _105808, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1281, 0], [_143804|_143806], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1281, _143804)
^  Unify: (273) [user] mfix_vars1(1281, _143804)
   Call: (274) [system] var(1281)
^  Redo: (273) [user] mfix_vars1(1281, _143804)
^  Unify: (273) [user] mfix_vars1(1281, '$VAR'(_148450))
   Call: (274) [system] atom(1281)
^  Redo: (273) [user] mfix_vars1(1281, _143804)
^  Unify: (273) [user] mfix_vars1(1281, _143804)
   Call: (274) [system] 1281==true
^  Redo: (273) [user] mfix_vars1(1281, _143804)
^  Unify: (273) [user] mfix_vars1(1281, _143804)
   Call: (274) [system] 1281==false
^  Redo: (273) [user] mfix_vars1(1281, _143804)
^  Unify: (273) [user] mfix_vars1(1281, _143804)
   Call: (274) [system] 1281==[_157730, _157736]
^  Redo: (273) [user] mfix_vars1(1281, _143804)
^  Unify: (273) [user] mfix_vars1(1281, _143804)
   Call: (274) [system] is_list(1281)
^  Redo: (273) [user] mfix_vars1(1281, _143804)
^  Unify: (273) [user] mfix_vars1(1281, _143804)
   Call: (274) [system] string(1281)
^  Redo: (273) [user] mfix_vars1(1281, _143804)
^  Unify: (273) [user] mfix_vars1(1281, _143804)
   Call: (274) [system] compound(1281)
^  Redo: (273) [user] mfix_vars1(1281, _143804)
^  Unify: (273) [user] mfix_vars1(1281, _143804)
^  Call: (274) [user] symbol(1281)
^  Unify: (274) [user] symbol(1281)
   Call: (275) [system] atom(1281)
   Fail: (275) [system] atom(1281)
^  Fail: (274) [user] symbol(1281)
^  Redo: (273) [user] mfix_vars1(1281, _143804)
   Call: (274) [system] 1281=_143804
   Exit: (274) [system] 1281=1281
^  Exit: (273) [user] mfix_vars1(1281, 1281)
   Call: (273) [apply] apply:maplist_([0], _143806, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_178130|_178132], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _178130)
^  Unify: (274) [user] mfix_vars1(0, _178130)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _178130)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_182776))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _178130)
^  Unify: (274) [user] mfix_vars1(0, _178130)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _178130)
^  Unify: (274) [user] mfix_vars1(0, _178130)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _178130)
^  Unify: (274) [user] mfix_vars1(0, _178130)
   Call: (275) [system] 0==[_192056, _192062]
^  Redo: (274) [user] mfix_vars1(0, _178130)
^  Unify: (274) [user] mfix_vars1(0, _178130)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _178130)
^  Unify: (274) [user] mfix_vars1(0, _178130)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _178130)
^  Unify: (274) [user] mfix_vars1(0, _178130)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _178130)
^  Unify: (274) [user] mfix_vars1(0, _178130)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _178130)
   Call: (275) [system] 0=_178130
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _178132, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1281, 0], [1281, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    #[test]", 1281, 0], [";;    #[test]", 1281, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1281, 0], [";;    #[test]", 1281, 0])
   Call: (270) [system] compound_name_arguments(_72304, '$COMMENT', [";;    #[test]", 1281, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT', [";;    #[test]", 1281, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1281, 0)\=@='$COMMENT'(";;    #[test]", 1281, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1281, 0), _66718)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    #[test]", 1281, 0), _228304))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1281, 0), _228304))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1281, 0), _228304))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1281, 0), _228304))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1281, 0), _228304)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1281, 0), _228304)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    #[test]", 1281, 0), _233890))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1281, 0), _233890))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    #[test]", 1281, 0), _233890)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1281, 0), _233890)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1281, 0), _233890)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1281, 0)\=@='$COMMENT'(";;    #[test]", 1281, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1281, 0), _228304)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    #[test]", 1281, 0), _61106))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1281, 0), _61106))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1281, 0), _61106))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1281, 0), _61106))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1281, 0), _61106)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1281, 0), _61106)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    #[test]", 1281, 0), _256210))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1281, 0), _256210))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    #[test]", 1281, 0), _256210)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1281, 0), _256210)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1281, 0), _256210)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1281, 0)\=@='$COMMENT'(";;    #[test]", 1281, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1281, 0), _61106)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0)))
   Call: (261) [system] '$COMMENT'(";;    #[test]", 1281, 0)\=@='$COMMENT'(";;    #[test]", 1281, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1281, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1281, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1281, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1281, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1281, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1281, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1281, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1281, 0), _284988, [], _284990)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    #[test]", 1281, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1281, 0), _284988, [], _284990)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1281, 0), _284988, [], _284990)
   Call: (258) [system] atom('$COMMENT'(";;    #[test]", 1281, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1281, 0), _284988, [], _284990)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1281, 0), _284988, [], _284990)
   Call: (258) [system] compound('$COMMENT'(";;    #[test]", 1281, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    #[test]", 1281, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1281, 0), _294304, _294306)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT', [";;    #[test]", 1281, 0])
^  Call: (258) [user] subst_vars([";;    #[test]", 1281, 0], _296190, [], _284990)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1281, 0], [";;    #[test]", 1281, 0], [], [])
   Call: (259) [system] var([";;    #[test]", 1281, 0])
^  Redo: (258) [user] subst_vars([";;    #[test]", 1281, 0], _296190, [], _284990)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1281, 0], [_299926|_299928], [], _284990)
^  Call: (259) [user] subst_vars(";;    #[test]", _299926, [], _300866)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
   Call: (260) [system] var(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _299926, [], _300866)
^  Unify: (259) [user] subst_vars(";;    #[test]", _299926, [], _300866)
   Call: (260) [system] atom(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _299926, [], _300866)
^  Unify: (259) [user] subst_vars(";;    #[test]", _299926, [], _300866)
   Call: (260) [system] compound(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _299926, [], _300866)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Exit: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Call: (259) [user] subst_vars([1281, 0], _299928, [], _284990)
^  Unify: (259) [user] subst_vars([1281, 0], [1281, 0], [], [])
   Call: (260) [system] var([1281, 0])
^  Redo: (259) [user] subst_vars([1281, 0], _299928, [], _284990)
^  Unify: (259) [user] subst_vars([1281, 0], [_315798|_315800], [], _284990)
^  Call: (260) [user] subst_vars(1281, _315798, [], _316738)
^  Unify: (260) [user] subst_vars(1281, 1281, [], [])
   Call: (261) [system] var(1281)
^  Redo: (260) [user] subst_vars(1281, _315798, [], _316738)
^  Unify: (260) [user] subst_vars(1281, _315798, [], _316738)
   Call: (261) [system] atom(1281)
^  Redo: (260) [user] subst_vars(1281, _315798, [], _316738)
^  Unify: (260) [user] subst_vars(1281, _315798, [], _316738)
   Call: (261) [system] compound(1281)
^  Redo: (260) [user] subst_vars(1281, _315798, [], _316738)
^  Unify: (260) [user] subst_vars(1281, 1281, [], [])
^  Exit: (260) [user] subst_vars(1281, 1281, [], [])
^  Call: (260) [user] subst_vars([0], _315800, [], _284990)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _315800, [], _284990)
^  Unify: (260) [user] subst_vars([0], [_331670|_331672], [], _284990)
^  Call: (261) [user] subst_vars(0, _331670, [], _332610)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _331670, [], _332610)
^  Unify: (261) [user] subst_vars(0, _331670, [], _332610)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _331670, [], _332610)
^  Unify: (261) [user] subst_vars(0, _331670, [], _332610)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _331670, [], _332610)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _331672, [], _284990)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _331672, [], _284990)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1281, 0], [1281, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    #[test]", 1281, 0], [";;    #[test]", 1281, 0], [], [])
   Call: (258) [system] compound_name_arguments(_284988, '$COMMENT', [";;    #[test]", 1281, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT', [";;    #[test]", 1281, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1281, 0), '$COMMENT'(";;    #[test]", 1281, 0), [], [])
   Call: (257) [system] _355028=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1281, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1281, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1281, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1281, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1281, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1281, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1281, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1281, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1281, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1282, 0, 45838, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$stream_position'(45838, 1282, 0, 45838)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _407758))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _407758))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _407758)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _407758)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _407758)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _407758)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _413370))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _413370))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _413370))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _413370))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _413370)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _413370)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _418956))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _418956))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _418956)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _418956)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _418956)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _418956)
   Call: (270) [system] var('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _418956)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$VAR'(_426416))
   Call: (270) [system] atom('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _418956)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _418956)
   Call: (270) [system] '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _418956)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _418956)
   Call: (270) [system] '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _418956)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _418956)
   Call: (270) [system] '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0)==[_435696, _435702]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _418956)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _418956)
   Call: (270) [system] is_list('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _418956)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _418956)
   Call: (270) [system] string('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _418956)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _418956)
   Call: (270) [system] compound('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _445898, _445900)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT', [";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0], _449640)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0], _449640)
   Call: (271) [apply] apply:maplist_([";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0], _449640, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0], [_452458|_452460], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _452458)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _452458)
   Call: (273) [system] var(";;    fn let_op_external_vars_at_right_are_kept_untouched() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _452458)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", '$VAR'(_457104))
   Call: (273) [system] atom(";;    fn let_op_external_vars_at_right_are_kept_untouched() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _452458)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _452458)
   Call: (273) [system] ";;    fn let_op_external_vars_at_right_are_kept_untouched() {"==true
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _452458)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _452458)
   Call: (273) [system] ";;    fn let_op_external_vars_at_right_are_kept_untouched() {"==false
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _452458)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _452458)
   Call: (273) [system] ";;    fn let_op_external_vars_at_right_are_kept_untouched() {"==[_466384, _466390]
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _452458)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _452458)
   Call: (273) [system] is_list(";;    fn let_op_external_vars_at_right_are_kept_untouched() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _452458)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _452458)
   Call: (273) [system] string(";;    fn let_op_external_vars_at_right_are_kept_untouched() {")
   Exit: (273) [system] string(";;    fn let_op_external_vars_at_right_are_kept_untouched() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _452458)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _452458)
   Call: (273) [system] compound(";;    fn let_op_external_vars_at_right_are_kept_untouched() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _452458)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _452458)
^  Call: (273) [user] symbol(";;    fn let_op_external_vars_at_right_are_kept_untouched() {")
^  Unify: (273) [user] symbol(";;    fn let_op_external_vars_at_right_are_kept_untouched() {")
   Call: (274) [system] atom(";;    fn let_op_external_vars_at_right_are_kept_untouched() {")
   Fail: (274) [system] atom(";;    fn let_op_external_vars_at_right_are_kept_untouched() {")
^  Fail: (273) [user] symbol(";;    fn let_op_external_vars_at_right_are_kept_untouched() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _452458)
   Call: (273) [system] ";;    fn let_op_external_vars_at_right_are_kept_untouched() {"=_452458
   Exit: (273) [system] ";;    fn let_op_external_vars_at_right_are_kept_untouched() {"=";;    fn let_op_external_vars_at_right_are_kept_untouched() {"
^  Exit: (272) [user] mfix_vars1(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", ";;    fn let_op_external_vars_at_right_are_kept_untouched() {")
   Call: (272) [apply] apply:maplist_([1282, 0], _452460, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1282, 0], [_490456|_490458], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1282, _490456)
^  Unify: (273) [user] mfix_vars1(1282, _490456)
   Call: (274) [system] var(1282)
^  Redo: (273) [user] mfix_vars1(1282, _490456)
^  Unify: (273) [user] mfix_vars1(1282, '$VAR'(_495102))
   Call: (274) [system] atom(1282)
^  Redo: (273) [user] mfix_vars1(1282, _490456)
^  Unify: (273) [user] mfix_vars1(1282, _490456)
   Call: (274) [system] 1282==true
^  Redo: (273) [user] mfix_vars1(1282, _490456)
^  Unify: (273) [user] mfix_vars1(1282, _490456)
   Call: (274) [system] 1282==false
^  Redo: (273) [user] mfix_vars1(1282, _490456)
^  Unify: (273) [user] mfix_vars1(1282, _490456)
   Call: (274) [system] 1282==[_504382, _504388]
^  Redo: (273) [user] mfix_vars1(1282, _490456)
^  Unify: (273) [user] mfix_vars1(1282, _490456)
   Call: (274) [system] is_list(1282)
^  Redo: (273) [user] mfix_vars1(1282, _490456)
^  Unify: (273) [user] mfix_vars1(1282, _490456)
   Call: (274) [system] string(1282)
^  Redo: (273) [user] mfix_vars1(1282, _490456)
^  Unify: (273) [user] mfix_vars1(1282, _490456)
   Call: (274) [system] compound(1282)
^  Redo: (273) [user] mfix_vars1(1282, _490456)
^  Unify: (273) [user] mfix_vars1(1282, _490456)
^  Call: (274) [user] symbol(1282)
^  Unify: (274) [user] symbol(1282)
   Call: (275) [system] atom(1282)
   Fail: (275) [system] atom(1282)
^  Fail: (274) [user] symbol(1282)
^  Redo: (273) [user] mfix_vars1(1282, _490456)
   Call: (274) [system] 1282=_490456
   Exit: (274) [system] 1282=1282
^  Exit: (273) [user] mfix_vars1(1282, 1282)
   Call: (273) [apply] apply:maplist_([0], _6044, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_6830|_6832], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _6830)
^  Unify: (274) [user] mfix_vars1(0, _6830)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _6830)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_11476))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _6830)
^  Unify: (274) [user] mfix_vars1(0, _6830)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _6830)
^  Unify: (274) [user] mfix_vars1(0, _6830)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _6830)
^  Unify: (274) [user] mfix_vars1(0, _6830)
   Call: (275) [system] 0==[_20756, _20762]
^  Redo: (274) [user] mfix_vars1(0, _6830)
^  Unify: (274) [user] mfix_vars1(0, _6830)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _6830)
^  Unify: (274) [user] mfix_vars1(0, _6830)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _6830)
^  Unify: (274) [user] mfix_vars1(0, _6830)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _6830)
^  Unify: (274) [user] mfix_vars1(0, _6830)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6830)
   Call: (275) [system] 0=_6830
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6832, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1282, 0], [1282, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0], [";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0], [";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0])
   Call: (270) [system] compound_name_arguments(_5990, '$COMMENT', [";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT', [";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0)\=@='$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _5976)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _57004))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _57004))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _57004))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _57004))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _57004)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _57004)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _62590))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _62590))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _62590)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _62590)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _62590)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0)\=@='$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _57004)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _5956))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _5956))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _5956))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _5956))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _5956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _5956)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _84910))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _84910))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _84910)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _84910)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _84910)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0)\=@='$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _5956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0)))
   Call: (261) [system] '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0)\=@='$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _113688, [], _113690)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _113688, [], _113690)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _113688, [], _113690)
   Call: (258) [system] atom('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _113688, [], _113690)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _113688, [], _113690)
   Call: (258) [system] compound('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), _123004, _123006)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT', [";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0])
^  Call: (258) [user] subst_vars([";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0], _124890, [], _113690)
^  Unify: (258) [user] subst_vars([";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0], [";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0], [], [])
   Call: (259) [system] var([";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0])
^  Redo: (258) [user] subst_vars([";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0], _124890, [], _113690)
^  Unify: (258) [user] subst_vars([";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0], [_128626|_128628], [], _113690)
^  Call: (259) [user] subst_vars(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _128626, [], _129566)
^  Unify: (259) [user] subst_vars(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", ";;    fn let_op_external_vars_at_right_are_kept_untouched() {", [], [])
   Call: (260) [system] var(";;    fn let_op_external_vars_at_right_are_kept_untouched() {")
^  Redo: (259) [user] subst_vars(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _128626, [], _129566)
^  Unify: (259) [user] subst_vars(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _128626, [], _129566)
   Call: (260) [system] atom(";;    fn let_op_external_vars_at_right_are_kept_untouched() {")
^  Redo: (259) [user] subst_vars(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _128626, [], _129566)
^  Unify: (259) [user] subst_vars(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _128626, [], _129566)
   Call: (260) [system] compound(";;    fn let_op_external_vars_at_right_are_kept_untouched() {")
^  Redo: (259) [user] subst_vars(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", _128626, [], _129566)
^  Unify: (259) [user] subst_vars(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", ";;    fn let_op_external_vars_at_right_are_kept_untouched() {", [], [])
^  Exit: (259) [user] subst_vars(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", ";;    fn let_op_external_vars_at_right_are_kept_untouched() {", [], [])
^  Call: (259) [user] subst_vars([1282, 0], _128628, [], _113690)
^  Unify: (259) [user] subst_vars([1282, 0], [1282, 0], [], [])
   Call: (260) [system] var([1282, 0])
^  Redo: (259) [user] subst_vars([1282, 0], _128628, [], _113690)
^  Unify: (259) [user] subst_vars([1282, 0], [_144498|_144500], [], _113690)
^  Call: (260) [user] subst_vars(1282, _144498, [], _145438)
^  Unify: (260) [user] subst_vars(1282, 1282, [], [])
   Call: (261) [system] var(1282)
^  Redo: (260) [user] subst_vars(1282, _144498, [], _145438)
^  Unify: (260) [user] subst_vars(1282, _144498, [], _145438)
   Call: (261) [system] atom(1282)
^  Redo: (260) [user] subst_vars(1282, _144498, [], _145438)
^  Unify: (260) [user] subst_vars(1282, _144498, [], _145438)
   Call: (261) [system] compound(1282)
^  Redo: (260) [user] subst_vars(1282, _144498, [], _145438)
^  Unify: (260) [user] subst_vars(1282, 1282, [], [])
^  Exit: (260) [user] subst_vars(1282, 1282, [], [])
^  Call: (260) [user] subst_vars([0], _144500, [], _113690)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _144500, [], _113690)
^  Unify: (260) [user] subst_vars([0], [_160370|_160372], [], _113690)
^  Call: (261) [user] subst_vars(0, _160370, [], _161310)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _160370, [], _161310)
^  Unify: (261) [user] subst_vars(0, _160370, [], _161310)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _160370, [], _161310)
^  Unify: (261) [user] subst_vars(0, _160370, [], _161310)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _160370, [], _161310)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _160372, [], _113690)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _160372, [], _113690)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1282, 0], [1282, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0], [";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0], [], [])
   Call: (258) [system] compound_name_arguments(_113688, '$COMMENT', [";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT', [";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), [], [])
   Call: (257) [system] _183728=metta_file_buffer(+, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_op_external_vars_at_right_are_kept_untouched() {", 1282, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1283, 0, 45900, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$stream_position'(45900, 1283, 0, 45900)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _236464))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _236464))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _236464)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _236464)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _236464)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _236464)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _242076))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _242076))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _242076))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _242076))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _242076)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _242076)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _247662))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _247662))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _247662)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _247662)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _247662)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _247662)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _247662)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$VAR'(_255122))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _247662)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _247662)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _247662)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _247662)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _247662)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _247662)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0)==[_264402, _264408]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _247662)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _247662)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _247662)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _247662)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _247662)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _247662)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _274604, _274606)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0], _278346)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0], _278346)
   Call: (271) [apply] apply:maplist_([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0], _278346, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0], [_281164|_281166], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _281164)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _281164)
   Call: (273) [system] var(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _281164)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", '$VAR'(_285810))
   Call: (273) [system] atom(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _281164)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _281164)
   Call: (273) [system] ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _281164)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _281164)
   Call: (273) [system] ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _281164)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _281164)
   Call: (273) [system] ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),"==[_295090, _295096]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _281164)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _281164)
   Call: (273) [system] is_list(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _281164)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _281164)
   Call: (273) [system] string(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),")
   Exit: (273) [system] string(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _281164)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _281164)
   Call: (273) [system] compound(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _281164)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _281164)
^  Call: (273) [user] symbol(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),")
^  Unify: (273) [user] symbol(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),")
   Call: (274) [system] atom(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),")
   Fail: (274) [system] atom(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),")
^  Fail: (273) [user] symbol(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _281164)
   Call: (273) [system] ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),"=_281164
   Exit: (273) [system] ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),"=";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),")
   Call: (272) [apply] apply:maplist_([1283, 0], _281166, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1283, 0], [_319162|_319164], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1283, _319162)
^  Unify: (273) [user] mfix_vars1(1283, _319162)
   Call: (274) [system] var(1283)
^  Redo: (273) [user] mfix_vars1(1283, _319162)
^  Unify: (273) [user] mfix_vars1(1283, '$VAR'(_323808))
   Call: (274) [system] atom(1283)
^  Redo: (273) [user] mfix_vars1(1283, _319162)
^  Unify: (273) [user] mfix_vars1(1283, _319162)
   Call: (274) [system] 1283==true
^  Redo: (273) [user] mfix_vars1(1283, _319162)
^  Unify: (273) [user] mfix_vars1(1283, _319162)
   Call: (274) [system] 1283==false
^  Redo: (273) [user] mfix_vars1(1283, _319162)
^  Unify: (273) [user] mfix_vars1(1283, _319162)
   Call: (274) [system] 1283==[_333088, _333094]
^  Redo: (273) [user] mfix_vars1(1283, _319162)
^  Unify: (273) [user] mfix_vars1(1283, _319162)
   Call: (274) [system] is_list(1283)
^  Redo: (273) [user] mfix_vars1(1283, _319162)
^  Unify: (273) [user] mfix_vars1(1283, _319162)
   Call: (274) [system] string(1283)
^  Redo: (273) [user] mfix_vars1(1283, _319162)
^  Unify: (273) [user] mfix_vars1(1283, _319162)
   Call: (274) [system] compound(1283)
^  Redo: (273) [user] mfix_vars1(1283, _319162)
^  Unify: (273) [user] mfix_vars1(1283, _319162)
^  Call: (274) [user] symbol(1283)
^  Unify: (274) [user] symbol(1283)
   Call: (275) [system] atom(1283)
   Fail: (275) [system] atom(1283)
^  Fail: (274) [user] symbol(1283)
^  Redo: (273) [user] mfix_vars1(1283, _319162)
   Call: (274) [system] 1283=_319162
   Exit: (274) [system] 1283=1283
^  Exit: (273) [user] mfix_vars1(1283, 1283)
   Call: (273) [apply] apply:maplist_([0], _319164, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_353488|_353490], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _353488)
^  Unify: (274) [user] mfix_vars1(0, _353488)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _353488)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_358134))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _353488)
^  Unify: (274) [user] mfix_vars1(0, _353488)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _353488)
^  Unify: (274) [user] mfix_vars1(0, _353488)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _353488)
^  Unify: (274) [user] mfix_vars1(0, _353488)
   Call: (275) [system] 0==[_367414, _367420]
^  Redo: (274) [user] mfix_vars1(0, _353488)
^  Unify: (274) [user] mfix_vars1(0, _353488)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _353488)
^  Unify: (274) [user] mfix_vars1(0, _353488)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _353488)
^  Unify: (274) [user] mfix_vars1(0, _353488)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _353488)
^  Unify: (274) [user] mfix_vars1(0, _353488)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _353488)
   Call: (275) [system] 0=_353488
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _353490, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1283, 0], [1283, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0], [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0], [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0])
   Call: (270) [system] compound_name_arguments(_247662, '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0)\=@='$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _242076)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _403662))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _403662))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _403662))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _403662))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _403662)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _403662)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _409248))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _409248))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _409248)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _409248)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _409248)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0)\=@='$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _403662)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _236464))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _236464))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _236464))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _236464))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _236464)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _236464)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _431568))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _431568))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _431568)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _431568)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _431568)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0)\=@='$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _236464)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0)\=@='$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _460346, [], _460348)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _460346, [], _460348)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _460346, [], _460348)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _460346, [], _460348)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _460346, [], _460348)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), _469662, _469664)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0], _471548, [], _460348)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0], [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0], [], [])
   Call: (259) [system] var([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0], _471548, [], _460348)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0], [_475284|_475286], [], _460348)
^  Call: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _475284, [], _476224)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", [], [])
   Call: (260) [system] var(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _475284, [], _476224)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _475284, [], _476224)
   Call: (260) [system] atom(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _475284, [], _476224)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _475284, [], _476224)
   Call: (260) [system] compound(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", _475284, [], _476224)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", [], [])
^  Call: (259) [user] subst_vars([1283, 0], _475286, [], _460348)
^  Unify: (259) [user] subst_vars([1283, 0], [1283, 0], [], [])
   Call: (260) [system] var([1283, 0])
^  Redo: (259) [user] subst_vars([1283, 0], _475286, [], _460348)
^  Unify: (259) [user] subst_vars([1283, 0], [_491156|_491158], [], _460348)
^  Call: (260) [user] subst_vars(1283, _491156, [], _492096)
^  Unify: (260) [user] subst_vars(1283, 1283, [], [])
   Call: (261) [system] var(1283)
^  Redo: (260) [user] subst_vars(1283, _491156, [], _492096)
^  Unify: (260) [user] subst_vars(1283, _491156, [], _492096)
   Call: (261) [system] atom(1283)
^  Redo: (260) [user] subst_vars(1283, _491156, [], _492096)
^  Unify: (260) [user] subst_vars(1283, _491156, [], _492096)
   Call: (261) [system] compound(1283)
^  Redo: (260) [user] subst_vars(1283, _491156, [], _492096)
^  Unify: (260) [user] subst_vars(1283, 1283, [], [])
^  Exit: (260) [user] subst_vars(1283, 1283, [], [])
^  Call: (260) [user] subst_vars([0], _491158, [], _460348)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _491158, [], _460348)
^  Unify: (260) [user] subst_vars([0], [_507028|_507030], [], _460348)
^  Call: (261) [user] subst_vars(0, _507028, [], _507968)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _507028, [], _507968)
^  Unify: (261) [user] subst_vars(0, _507028, [], _507968)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _507028, [], _507968)
^  Unify: (261) [user] subst_vars(0, _507028, [], _507968)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _507028, [], _507968)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _507030, [], _460348)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _507030, [], _460348)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1283, 0], [1283, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0], [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5956, '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), [], [])
   Call: (257) [system] _12396=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext), expr!(t)]),", 1283, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1284, 0, 45981, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$stream_position'(45981, 1284, 0, 45981)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _65120))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _65120))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _65120)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _65120)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _65120)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _65120)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _70732))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _70732))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _70732))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _70732))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _70732)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _70732)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _76318))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _76318))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _76318)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _76318)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _76318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _76318)
   Call: (270) [system] var('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _76318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$VAR'(_83778))
   Call: (270) [system] atom('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _76318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _76318)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _76318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _76318)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _76318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _76318)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0)==[_93058, _93064]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _76318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _76318)
   Call: (270) [system] is_list('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _76318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _76318)
   Call: (270) [system] string('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _76318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _76318)
   Call: (270) [system] compound('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _103260, _103262)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT', [";;            Ok(vec![expr!(ext)]));", 1284, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            Ok(vec![expr!(ext)]));", 1284, 0], _107002)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            Ok(vec![expr!(ext)]));", 1284, 0], _107002)
   Call: (271) [apply] apply:maplist_([";;            Ok(vec![expr!(ext)]));", 1284, 0], _107002, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            Ok(vec![expr!(ext)]));", 1284, 0], [_109820|_109822], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext)]));", _109820)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext)]));", _109820)
   Call: (273) [system] var(";;            Ok(vec![expr!(ext)]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext)]));", _109820)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext)]));", '$VAR'(_114466))
   Call: (273) [system] atom(";;            Ok(vec![expr!(ext)]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext)]));", _109820)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext)]));", _109820)
   Call: (273) [system] ";;            Ok(vec![expr!(ext)]));"==true
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext)]));", _109820)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext)]));", _109820)
   Call: (273) [system] ";;            Ok(vec![expr!(ext)]));"==false
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext)]));", _109820)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext)]));", _109820)
   Call: (273) [system] ";;            Ok(vec![expr!(ext)]));"==[_123746, _123752]
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext)]));", _109820)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext)]));", _109820)
   Call: (273) [system] is_list(";;            Ok(vec![expr!(ext)]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext)]));", _109820)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext)]));", _109820)
   Call: (273) [system] string(";;            Ok(vec![expr!(ext)]));")
   Exit: (273) [system] string(";;            Ok(vec![expr!(ext)]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext)]));", _109820)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext)]));", _109820)
   Call: (273) [system] compound(";;            Ok(vec![expr!(ext)]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext)]));", _109820)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext)]));", _109820)
^  Call: (273) [user] symbol(";;            Ok(vec![expr!(ext)]));")
^  Unify: (273) [user] symbol(";;            Ok(vec![expr!(ext)]));")
   Call: (274) [system] atom(";;            Ok(vec![expr!(ext)]));")
   Fail: (274) [system] atom(";;            Ok(vec![expr!(ext)]));")
^  Fail: (273) [user] symbol(";;            Ok(vec![expr!(ext)]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext)]));", _109820)
   Call: (273) [system] ";;            Ok(vec![expr!(ext)]));"=_109820
   Exit: (273) [system] ";;            Ok(vec![expr!(ext)]));"=";;            Ok(vec![expr!(ext)]));"
^  Exit: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext)]));", ";;            Ok(vec![expr!(ext)]));")
   Call: (272) [apply] apply:maplist_([1284, 0], _109822, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1284, 0], [_147818|_147820], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1284, _147818)
^  Unify: (273) [user] mfix_vars1(1284, _147818)
   Call: (274) [system] var(1284)
^  Redo: (273) [user] mfix_vars1(1284, _147818)
^  Unify: (273) [user] mfix_vars1(1284, '$VAR'(_152464))
   Call: (274) [system] atom(1284)
^  Redo: (273) [user] mfix_vars1(1284, _147818)
^  Unify: (273) [user] mfix_vars1(1284, _147818)
   Call: (274) [system] 1284==true
^  Redo: (273) [user] mfix_vars1(1284, _147818)
^  Unify: (273) [user] mfix_vars1(1284, _147818)
   Call: (274) [system] 1284==false
^  Redo: (273) [user] mfix_vars1(1284, _147818)
^  Unify: (273) [user] mfix_vars1(1284, _147818)
   Call: (274) [system] 1284==[_161744, _161750]
^  Redo: (273) [user] mfix_vars1(1284, _147818)
^  Unify: (273) [user] mfix_vars1(1284, _147818)
   Call: (274) [system] is_list(1284)
^  Redo: (273) [user] mfix_vars1(1284, _147818)
^  Unify: (273) [user] mfix_vars1(1284, _147818)
   Call: (274) [system] string(1284)
^  Redo: (273) [user] mfix_vars1(1284, _147818)
^  Unify: (273) [user] mfix_vars1(1284, _147818)
   Call: (274) [system] compound(1284)
^  Redo: (273) [user] mfix_vars1(1284, _147818)
^  Unify: (273) [user] mfix_vars1(1284, _147818)
^  Call: (274) [user] symbol(1284)
^  Unify: (274) [user] symbol(1284)
   Call: (275) [system] atom(1284)
   Fail: (275) [system] atom(1284)
^  Fail: (274) [user] symbol(1284)
^  Redo: (273) [user] mfix_vars1(1284, _147818)
   Call: (274) [system] 1284=_147818
   Exit: (274) [system] 1284=1284
^  Exit: (273) [user] mfix_vars1(1284, 1284)
   Call: (273) [apply] apply:maplist_([0], _147820, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_182144|_182146], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _182144)
^  Unify: (274) [user] mfix_vars1(0, _182144)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _182144)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_186790))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _182144)
^  Unify: (274) [user] mfix_vars1(0, _182144)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _182144)
^  Unify: (274) [user] mfix_vars1(0, _182144)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _182144)
^  Unify: (274) [user] mfix_vars1(0, _182144)
   Call: (275) [system] 0==[_196070, _196076]
^  Redo: (274) [user] mfix_vars1(0, _182144)
^  Unify: (274) [user] mfix_vars1(0, _182144)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _182144)
^  Unify: (274) [user] mfix_vars1(0, _182144)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _182144)
^  Unify: (274) [user] mfix_vars1(0, _182144)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _182144)
^  Unify: (274) [user] mfix_vars1(0, _182144)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _182144)
   Call: (275) [system] 0=_182144
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _182146, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1284, 0], [1284, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            Ok(vec![expr!(ext)]));", 1284, 0], [";;            Ok(vec![expr!(ext)]));", 1284, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            Ok(vec![expr!(ext)]));", 1284, 0], [";;            Ok(vec![expr!(ext)]));", 1284, 0])
   Call: (270) [system] compound_name_arguments(_76318, '$COMMENT', [";;            Ok(vec![expr!(ext)]));", 1284, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT', [";;            Ok(vec![expr!(ext)]));", 1284, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0)\=@='$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _70732)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _232318))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _232318))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _232318))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _232318))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _232318)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _232318)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _237904))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _237904))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _237904)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _237904)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _237904)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0)\=@='$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _232318)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _65120))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _65120))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _65120))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _65120))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _65120)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _65120)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _260224))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _260224))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _260224)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _260224)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _260224)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0)\=@='$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _65120)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0)))
   Call: (261) [system] '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0)\=@='$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _289002, [], _289004)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _289002, [], _289004)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _289002, [], _289004)
   Call: (258) [system] atom('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _289002, [], _289004)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _289002, [], _289004)
   Call: (258) [system] compound('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), _298318, _298320)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT', [";;            Ok(vec![expr!(ext)]));", 1284, 0])
^  Call: (258) [user] subst_vars([";;            Ok(vec![expr!(ext)]));", 1284, 0], _300204, [], _289004)
^  Unify: (258) [user] subst_vars([";;            Ok(vec![expr!(ext)]));", 1284, 0], [";;            Ok(vec![expr!(ext)]));", 1284, 0], [], [])
   Call: (259) [system] var([";;            Ok(vec![expr!(ext)]));", 1284, 0])
^  Redo: (258) [user] subst_vars([";;            Ok(vec![expr!(ext)]));", 1284, 0], _300204, [], _289004)
^  Unify: (258) [user] subst_vars([";;            Ok(vec![expr!(ext)]));", 1284, 0], [_303940|_303942], [], _289004)
^  Call: (259) [user] subst_vars(";;            Ok(vec![expr!(ext)]));", _303940, [], _304880)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!(ext)]));", ";;            Ok(vec![expr!(ext)]));", [], [])
   Call: (260) [system] var(";;            Ok(vec![expr!(ext)]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![expr!(ext)]));", _303940, [], _304880)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!(ext)]));", _303940, [], _304880)
   Call: (260) [system] atom(";;            Ok(vec![expr!(ext)]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![expr!(ext)]));", _303940, [], _304880)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!(ext)]));", _303940, [], _304880)
   Call: (260) [system] compound(";;            Ok(vec![expr!(ext)]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![expr!(ext)]));", _303940, [], _304880)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!(ext)]));", ";;            Ok(vec![expr!(ext)]));", [], [])
^  Exit: (259) [user] subst_vars(";;            Ok(vec![expr!(ext)]));", ";;            Ok(vec![expr!(ext)]));", [], [])
^  Call: (259) [user] subst_vars([1284, 0], _303942, [], _289004)
^  Unify: (259) [user] subst_vars([1284, 0], [1284, 0], [], [])
   Call: (260) [system] var([1284, 0])
^  Redo: (259) [user] subst_vars([1284, 0], _303942, [], _289004)
^  Unify: (259) [user] subst_vars([1284, 0], [_319812|_319814], [], _289004)
^  Call: (260) [user] subst_vars(1284, _319812, [], _320752)
^  Unify: (260) [user] subst_vars(1284, 1284, [], [])
   Call: (261) [system] var(1284)
^  Redo: (260) [user] subst_vars(1284, _319812, [], _320752)
^  Unify: (260) [user] subst_vars(1284, _319812, [], _320752)
   Call: (261) [system] atom(1284)
^  Redo: (260) [user] subst_vars(1284, _319812, [], _320752)
^  Unify: (260) [user] subst_vars(1284, _319812, [], _320752)
   Call: (261) [system] compound(1284)
^  Redo: (260) [user] subst_vars(1284, _319812, [], _320752)
^  Unify: (260) [user] subst_vars(1284, 1284, [], [])
^  Exit: (260) [user] subst_vars(1284, 1284, [], [])
^  Call: (260) [user] subst_vars([0], _319814, [], _289004)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _319814, [], _289004)
^  Unify: (260) [user] subst_vars([0], [_335684|_335686], [], _289004)
^  Call: (261) [user] subst_vars(0, _335684, [], _336624)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _335684, [], _336624)
^  Unify: (261) [user] subst_vars(0, _335684, [], _336624)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _335684, [], _336624)
^  Unify: (261) [user] subst_vars(0, _335684, [], _336624)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _335684, [], _336624)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _335686, [], _289004)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _335686, [], _289004)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1284, 0], [1284, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            Ok(vec![expr!(ext)]));", 1284, 0], [";;            Ok(vec![expr!(ext)]));", 1284, 0], [], [])
   Call: (258) [system] compound_name_arguments(_289002, '$COMMENT', [";;            Ok(vec![expr!(ext)]));", 1284, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT', [";;            Ok(vec![expr!(ext)]));", 1284, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), [], [])
   Call: (257) [system] _359042=metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(ext)]));", 1284, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1285, 0, 46018, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$stream_position'(46018, 1285, 0, 46018)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _411778))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _411778))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _411778)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _411778)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _411778)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _411778)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _417390))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _417390))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _417390))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _417390))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _417390)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _417390)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _422976))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _422976))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _422976)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _422976)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _422976)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _422976)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _422976)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$VAR'(_430436))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _422976)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _422976)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _422976)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _422976)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _422976)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _422976)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0)==[_439716, _439722]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _422976)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _422976)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _422976)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _422976)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _422976)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _422976)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _449918, _449920)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0], _453660)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0], _453660)
   Call: (271) [apply] apply:maplist_([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0], _453660, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0], [_456478|_456480], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _456478)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _456478)
   Call: (273) [system] var(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _456478)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", '$VAR'(_461124))
   Call: (273) [system] atom(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _456478)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _456478)
   Call: (273) [system] ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _456478)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _456478)
   Call: (273) [system] ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _456478)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _456478)
   Call: (273) [system] ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),"==[_470404, _470410]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _456478)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _456478)
   Call: (273) [system] is_list(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _456478)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _456478)
   Call: (273) [system] string(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),")
   Exit: (273) [system] string(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _456478)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _456478)
   Call: (273) [system] compound(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _456478)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _456478)
^  Call: (273) [user] symbol(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),")
^  Unify: (273) [user] symbol(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),")
   Call: (274) [system] atom(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),")
   Fail: (274) [system] atom(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),")
^  Fail: (273) [user] symbol(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _456478)
   Call: (273) [system] ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),"=_456478
   Exit: (273) [system] ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),"=";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),")
   Call: (272) [apply] apply:maplist_([1285, 0], _456480, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1285, 0], [_494476|_494478], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1285, _494476)
^  Unify: (273) [user] mfix_vars1(1285, _494476)
   Call: (274) [system] var(1285)
^  Redo: (273) [user] mfix_vars1(1285, _494476)
^  Unify: (273) [user] mfix_vars1(1285, '$VAR'(_499122))
   Call: (274) [system] atom(1285)
^  Redo: (273) [user] mfix_vars1(1285, _494476)
^  Unify: (273) [user] mfix_vars1(1285, _494476)
   Call: (274) [system] 1285==true
^  Redo: (273) [user] mfix_vars1(1285, _494476)
^  Unify: (273) [user] mfix_vars1(1285, _494476)
   Call: (274) [system] 1285==false
^  Redo: (273) [user] mfix_vars1(1285, _494476)
^  Unify: (273) [user] mfix_vars1(1285, _494476)
   Call: (274) [system] 1285==[_508402, _508408]
^  Redo: (273) [user] mfix_vars1(1285, _494476)
^  Unify: (273) [user] mfix_vars1(1285, _494476)
   Call: (274) [system] is_list(1285)
^  Redo: (273) [user] mfix_vars1(1285, _494476)
^  Unify: (273) [user] mfix_vars1(1285, _494476)
   Call: (274) [system] string(1285)
^  Redo: (273) [user] mfix_vars1(1285, _494476)
^  Unify: (273) [user] mfix_vars1(1285, _494476)
   Call: (274) [system] compound(1285)
^  Redo: (273) [user] mfix_vars1(1285, _494476)
^  Unify: (273) [user] mfix_vars1(1285, _494476)
^  Call: (274) [user] symbol(1285)
^  Unify: (274) [user] symbol(1285)
   Call: (275) [system] atom(1285)
   Fail: (275) [system] atom(1285)
^  Fail: (274) [user] symbol(1285)
^  Redo: (273) [user] mfix_vars1(1285, _6048)
   Call: (274) [system] 1285=_6048
   Exit: (274) [system] 1285=1285
^  Exit: (273) [user] mfix_vars1(1285, 1285)
   Call: (273) [apply] apply:maplist_([0], _6050, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_10672|_10674], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _10672)
^  Unify: (274) [user] mfix_vars1(0, _10672)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _10672)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_15318))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _10672)
^  Unify: (274) [user] mfix_vars1(0, _10672)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _10672)
^  Unify: (274) [user] mfix_vars1(0, _10672)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _10672)
^  Unify: (274) [user] mfix_vars1(0, _10672)
   Call: (275) [system] 0==[_24598, _24604]
^  Redo: (274) [user] mfix_vars1(0, _10672)
^  Unify: (274) [user] mfix_vars1(0, _10672)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _10672)
^  Unify: (274) [user] mfix_vars1(0, _10672)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _10672)
^  Unify: (274) [user] mfix_vars1(0, _10672)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _10672)
^  Unify: (274) [user] mfix_vars1(0, _10672)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _10672)
   Call: (275) [system] 0=_10672
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _10674, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1285, 0], [1285, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0], [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0], [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0])
   Call: (270) [system] compound_name_arguments(_5996, '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0)\=@='$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _5982)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _60846))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _60846))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _60846))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _60846))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _60846)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _60846)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _66432))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _66432))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _66432)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _66432)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _66432)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0)\=@='$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _60846)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _5962))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _5962))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _5962))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _5962))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _5962)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _5962)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _88752))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _88752))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _88752)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _88752)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _88752)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0)\=@='$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _5962)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0)\=@='$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _117530, [], _117532)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _117530, [], _117532)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _117530, [], _117532)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _117530, [], _117532)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _117530, [], _117532)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), _126846, _126848)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0], _128732, [], _117532)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0], [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0], [], [])
   Call: (259) [system] var([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0], _128732, [], _117532)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0], [_132468|_132470], [], _117532)
^  Call: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _132468, [], _133408)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", [], [])
   Call: (260) [system] var(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _132468, [], _133408)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _132468, [], _133408)
   Call: (260) [system] atom(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _132468, [], _133408)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _132468, [], _133408)
   Call: (260) [system] compound(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", _132468, [], _133408)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", [], [])
^  Call: (259) [user] subst_vars([1285, 0], _132470, [], _117532)
^  Unify: (259) [user] subst_vars([1285, 0], [1285, 0], [], [])
   Call: (260) [system] var([1285, 0])
^  Redo: (259) [user] subst_vars([1285, 0], _132470, [], _117532)
^  Unify: (259) [user] subst_vars([1285, 0], [_148340|_148342], [], _117532)
^  Call: (260) [user] subst_vars(1285, _148340, [], _149280)
^  Unify: (260) [user] subst_vars(1285, 1285, [], [])
   Call: (261) [system] var(1285)
^  Redo: (260) [user] subst_vars(1285, _148340, [], _149280)
^  Unify: (260) [user] subst_vars(1285, _148340, [], _149280)
   Call: (261) [system] atom(1285)
^  Redo: (260) [user] subst_vars(1285, _148340, [], _149280)
^  Unify: (260) [user] subst_vars(1285, _148340, [], _149280)
   Call: (261) [system] compound(1285)
^  Redo: (260) [user] subst_vars(1285, _148340, [], _149280)
^  Unify: (260) [user] subst_vars(1285, 1285, [], [])
^  Exit: (260) [user] subst_vars(1285, 1285, [], [])
^  Call: (260) [user] subst_vars([0], _148342, [], _117532)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _148342, [], _117532)
^  Unify: (260) [user] subst_vars([0], [_164212|_164214], [], _117532)
^  Call: (261) [user] subst_vars(0, _164212, [], _165152)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _164212, [], _165152)
^  Unify: (261) [user] subst_vars(0, _164212, [], _165152)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _164212, [], _165152)
^  Unify: (261) [user] subst_vars(0, _164212, [], _165152)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _164212, [], _165152)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _164214, [], _117532)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _164214, [], _117532)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1285, 0], [1285, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0], [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0], [], [])
   Call: (258) [system] compound_name_arguments(_117530, '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), [], [])
   Call: (257) [system] _187570=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(t), expr!(ext \"A\"), expr!(t)]),", 1285, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1286, 0, 46103, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$stream_position'(46103, 1286, 0, 46103)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _240296))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _240296))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _240296)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _240296)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _240296)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _240296)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _245908))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _245908))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _245908))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _245908))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _245908)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _245908)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _251494))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _251494))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _251494)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _251494)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _251494)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _251494)
   Call: (270) [system] var('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _251494)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$VAR'(_258954))
   Call: (270) [system] atom('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _251494)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _251494)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _251494)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _251494)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _251494)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _251494)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0)==[_268234, _268240]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _251494)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _251494)
   Call: (270) [system] is_list('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _251494)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _251494)
   Call: (270) [system] string('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _251494)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _251494)
   Call: (270) [system] compound('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _278436, _278438)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT', [";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0], _282178)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0], _282178)
   Call: (271) [apply] apply:maplist_([";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0], _282178, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0], [_284996|_284998], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext \"A\")]));", _284996)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext \"A\")]));", _284996)
   Call: (273) [system] var(";;            Ok(vec![expr!(ext \"A\")]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext \"A\")]));", _284996)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext \"A\")]));", '$VAR'(_289642))
   Call: (273) [system] atom(";;            Ok(vec![expr!(ext \"A\")]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext \"A\")]));", _284996)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext \"A\")]));", _284996)
   Call: (273) [system] ";;            Ok(vec![expr!(ext \"A\")]));"==true
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext \"A\")]));", _284996)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext \"A\")]));", _284996)
   Call: (273) [system] ";;            Ok(vec![expr!(ext \"A\")]));"==false
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext \"A\")]));", _284996)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext \"A\")]));", _284996)
   Call: (273) [system] ";;            Ok(vec![expr!(ext \"A\")]));"==[_298922, _298928]
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext \"A\")]));", _284996)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext \"A\")]));", _284996)
   Call: (273) [system] is_list(";;            Ok(vec![expr!(ext \"A\")]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext \"A\")]));", _284996)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext \"A\")]));", _284996)
   Call: (273) [system] string(";;            Ok(vec![expr!(ext \"A\")]));")
   Exit: (273) [system] string(";;            Ok(vec![expr!(ext \"A\")]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext \"A\")]));", _284996)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext \"A\")]));", _284996)
   Call: (273) [system] compound(";;            Ok(vec![expr!(ext \"A\")]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext \"A\")]));", _284996)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext \"A\")]));", _284996)
^  Call: (273) [user] symbol(";;            Ok(vec![expr!(ext \"A\")]));")
^  Unify: (273) [user] symbol(";;            Ok(vec![expr!(ext \"A\")]));")
   Call: (274) [system] atom(";;            Ok(vec![expr!(ext \"A\")]));")
   Fail: (274) [system] atom(";;            Ok(vec![expr!(ext \"A\")]));")
^  Fail: (273) [user] symbol(";;            Ok(vec![expr!(ext \"A\")]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext \"A\")]));", _284996)
   Call: (273) [system] ";;            Ok(vec![expr!(ext \"A\")]));"=_284996
   Exit: (273) [system] ";;            Ok(vec![expr!(ext \"A\")]));"=";;            Ok(vec![expr!(ext \"A\")]));"
^  Exit: (272) [user] mfix_vars1(";;            Ok(vec![expr!(ext \"A\")]));", ";;            Ok(vec![expr!(ext \"A\")]));")
   Call: (272) [apply] apply:maplist_([1286, 0], _284998, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1286, 0], [_322994|_322996], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1286, _322994)
^  Unify: (273) [user] mfix_vars1(1286, _322994)
   Call: (274) [system] var(1286)
^  Redo: (273) [user] mfix_vars1(1286, _322994)
^  Unify: (273) [user] mfix_vars1(1286, '$VAR'(_327640))
   Call: (274) [system] atom(1286)
^  Redo: (273) [user] mfix_vars1(1286, _322994)
^  Unify: (273) [user] mfix_vars1(1286, _322994)
   Call: (274) [system] 1286==true
^  Redo: (273) [user] mfix_vars1(1286, _322994)
^  Unify: (273) [user] mfix_vars1(1286, _322994)
   Call: (274) [system] 1286==false
^  Redo: (273) [user] mfix_vars1(1286, _322994)
^  Unify: (273) [user] mfix_vars1(1286, _322994)
   Call: (274) [system] 1286==[_336920, _336926]
^  Redo: (273) [user] mfix_vars1(1286, _322994)
^  Unify: (273) [user] mfix_vars1(1286, _322994)
   Call: (274) [system] is_list(1286)
^  Redo: (273) [user] mfix_vars1(1286, _322994)
^  Unify: (273) [user] mfix_vars1(1286, _322994)
   Call: (274) [system] string(1286)
^  Redo: (273) [user] mfix_vars1(1286, _322994)
^  Unify: (273) [user] mfix_vars1(1286, _322994)
   Call: (274) [system] compound(1286)
^  Redo: (273) [user] mfix_vars1(1286, _322994)
^  Unify: (273) [user] mfix_vars1(1286, _322994)
^  Call: (274) [user] symbol(1286)
^  Unify: (274) [user] symbol(1286)
   Call: (275) [system] atom(1286)
   Fail: (275) [system] atom(1286)
^  Fail: (274) [user] symbol(1286)
^  Redo: (273) [user] mfix_vars1(1286, _322994)
   Call: (274) [system] 1286=_322994
   Exit: (274) [system] 1286=1286
^  Exit: (273) [user] mfix_vars1(1286, 1286)
   Call: (273) [apply] apply:maplist_([0], _322996, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_357320|_357322], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _357320)
^  Unify: (274) [user] mfix_vars1(0, _357320)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _357320)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_361966))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _357320)
^  Unify: (274) [user] mfix_vars1(0, _357320)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _357320)
^  Unify: (274) [user] mfix_vars1(0, _357320)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _357320)
^  Unify: (274) [user] mfix_vars1(0, _357320)
   Call: (275) [system] 0==[_371246, _371252]
^  Redo: (274) [user] mfix_vars1(0, _357320)
^  Unify: (274) [user] mfix_vars1(0, _357320)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _357320)
^  Unify: (274) [user] mfix_vars1(0, _357320)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _357320)
^  Unify: (274) [user] mfix_vars1(0, _357320)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _357320)
^  Unify: (274) [user] mfix_vars1(0, _357320)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _357320)
   Call: (275) [system] 0=_357320
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _357322, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1286, 0], [1286, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0], [";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0], [";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0])
   Call: (270) [system] compound_name_arguments(_251494, '$COMMENT', [";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT', [";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0)\=@='$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _245908)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _407494))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _407494))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _407494))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _407494))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _407494)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _407494)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _413080))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _413080))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _413080)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _413080)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _413080)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0)\=@='$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _407494)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _240296))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _240296))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _240296))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _240296))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _240296)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _240296)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _435400))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _435400))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _435400)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _435400)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _435400)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0)\=@='$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _240296)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0)))
   Call: (261) [system] '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0)\=@='$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _464178, [], _464180)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _464178, [], _464180)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _464178, [], _464180)
   Call: (258) [system] atom('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _464178, [], _464180)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _464178, [], _464180)
   Call: (258) [system] compound('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), _473494, _473496)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT', [";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0])
^  Call: (258) [user] subst_vars([";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0], _475380, [], _464180)
^  Unify: (258) [user] subst_vars([";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0], [";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0], [], [])
   Call: (259) [system] var([";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0])
^  Redo: (258) [user] subst_vars([";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0], _475380, [], _464180)
^  Unify: (258) [user] subst_vars([";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0], [_479116|_479118], [], _464180)
^  Call: (259) [user] subst_vars(";;            Ok(vec![expr!(ext \"A\")]));", _479116, [], _480056)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!(ext \"A\")]));", ";;            Ok(vec![expr!(ext \"A\")]));", [], [])
   Call: (260) [system] var(";;            Ok(vec![expr!(ext \"A\")]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![expr!(ext \"A\")]));", _479116, [], _480056)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!(ext \"A\")]));", _479116, [], _480056)
   Call: (260) [system] atom(";;            Ok(vec![expr!(ext \"A\")]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![expr!(ext \"A\")]));", _479116, [], _480056)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!(ext \"A\")]));", _479116, [], _480056)
   Call: (260) [system] compound(";;            Ok(vec![expr!(ext \"A\")]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![expr!(ext \"A\")]));", _479116, [], _480056)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!(ext \"A\")]));", ";;            Ok(vec![expr!(ext \"A\")]));", [], [])
^  Exit: (259) [user] subst_vars(";;            Ok(vec![expr!(ext \"A\")]));", ";;            Ok(vec![expr!(ext \"A\")]));", [], [])
^  Call: (259) [user] subst_vars([1286, 0], _479118, [], _464180)
^  Unify: (259) [user] subst_vars([1286, 0], [1286, 0], [], [])
   Call: (260) [system] var([1286, 0])
^  Redo: (259) [user] subst_vars([1286, 0], _479118, [], _464180)
^  Unify: (259) [user] subst_vars([1286, 0], [_494988|_494990], [], _464180)
^  Call: (260) [user] subst_vars(1286, _494988, [], _495928)
^  Unify: (260) [user] subst_vars(1286, 1286, [], [])
   Call: (261) [system] var(1286)
^  Redo: (260) [user] subst_vars(1286, _494988, [], _495928)
^  Unify: (260) [user] subst_vars(1286, _494988, [], _495928)
   Call: (261) [system] atom(1286)
^  Redo: (260) [user] subst_vars(1286, _494988, [], _495928)
^  Unify: (260) [user] subst_vars(1286, _494988, [], _495928)
   Call: (261) [system] compound(1286)
^  Redo: (260) [user] subst_vars(1286, _494988, [], _495928)
^  Unify: (260) [user] subst_vars(1286, 1286, [], [])
^  Exit: (260) [user] subst_vars(1286, 1286, [], [])
^  Call: (260) [user] subst_vars([0], _494990, [], _464180)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _494990, [], _464180)
^  Unify: (260) [user] subst_vars([0], [_510860|_510862], [], _464180)
^  Call: (261) [user] subst_vars(0, _510860, [], _511800)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _510860, [], _511800)
^  Unify: (261) [user] subst_vars(0, _510860, [], _511800)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _510860, [], _511800)
^  Unify: (261) [user] subst_vars(0, _510860, [], _511800)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _510860, [], _511800)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _510862, [], _464180)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _5994, [], _5948)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1286, 0], [1286, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0], [";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5946, '$COMMENT', [";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT', [";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), [], [])
   Call: (257) [system] _16220=metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(ext \"A\")]));", 1286, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1287, 0, 46144, '$COMMENT'(";;    }", 1287, 0), '$stream_position'(46144, 1287, 0, 46144)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1287, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1287, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    }", 1287, 0), _68938))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1287, 0), _68938))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    }", 1287, 0), _68938)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1287, 0), _68938)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1287, 0), _68938)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1287, 0), _68938)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    }", 1287, 0), _74550))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1287, 0), _74550))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1287, 0), _74550))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1287, 0), _74550))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1287, 0), _74550)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1287, 0), _74550)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    }", 1287, 0), _80136))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1287, 0), _80136))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    }", 1287, 0), _80136)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1287, 0), _80136)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1287, 0), _80136)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1287, 0), _80136)
   Call: (270) [system] var('$COMMENT'(";;    }", 1287, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1287, 0), _80136)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1287, 0), '$VAR'(_87596))
   Call: (270) [system] atom('$COMMENT'(";;    }", 1287, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1287, 0), _80136)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1287, 0), _80136)
   Call: (270) [system] '$COMMENT'(";;    }", 1287, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1287, 0), _80136)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1287, 0), _80136)
   Call: (270) [system] '$COMMENT'(";;    }", 1287, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1287, 0), _80136)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1287, 0), _80136)
   Call: (270) [system] '$COMMENT'(";;    }", 1287, 0)==[_96876, _96882]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1287, 0), _80136)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1287, 0), _80136)
   Call: (270) [system] is_list('$COMMENT'(";;    }", 1287, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1287, 0), _80136)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1287, 0), _80136)
   Call: (270) [system] string('$COMMENT'(";;    }", 1287, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1287, 0), _80136)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1287, 0), _80136)
   Call: (270) [system] compound('$COMMENT'(";;    }", 1287, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    }", 1287, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1287, 0), _107078, _107080)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1287, 0), '$COMMENT', [";;    }", 1287, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    }", 1287, 0], _110820)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1287, 0], _110820)
   Call: (271) [apply] apply:maplist_([";;    }", 1287, 0], _110820, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    }", 1287, 0], [_113638|_113640], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    }", _113638)
^  Unify: (272) [user] mfix_vars1(";;    }", _113638)
   Call: (273) [system] var(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _113638)
^  Unify: (272) [user] mfix_vars1(";;    }", '$VAR'(_118284))
   Call: (273) [system] atom(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _113638)
^  Unify: (272) [user] mfix_vars1(";;    }", _113638)
   Call: (273) [system] ";;    }"==true
^  Redo: (272) [user] mfix_vars1(";;    }", _113638)
^  Unify: (272) [user] mfix_vars1(";;    }", _113638)
   Call: (273) [system] ";;    }"==false
^  Redo: (272) [user] mfix_vars1(";;    }", _113638)
^  Unify: (272) [user] mfix_vars1(";;    }", _113638)
   Call: (273) [system] ";;    }"==[_127564, _127570]
^  Redo: (272) [user] mfix_vars1(";;    }", _113638)
^  Unify: (272) [user] mfix_vars1(";;    }", _113638)
   Call: (273) [system] is_list(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _113638)
^  Unify: (272) [user] mfix_vars1(";;    }", _113638)
   Call: (273) [system] string(";;    }")
   Exit: (273) [system] string(";;    }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    }", _113638)
^  Unify: (272) [user] mfix_vars1(";;    }", _113638)
   Call: (273) [system] compound(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _113638)
^  Unify: (272) [user] mfix_vars1(";;    }", _113638)
^  Call: (273) [user] symbol(";;    }")
^  Unify: (273) [user] symbol(";;    }")
   Call: (274) [system] atom(";;    }")
   Fail: (274) [system] atom(";;    }")
^  Fail: (273) [user] symbol(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _113638)
   Call: (273) [system] ";;    }"=_113638
   Exit: (273) [system] ";;    }"=";;    }"
^  Exit: (272) [user] mfix_vars1(";;    }", ";;    }")
   Call: (272) [apply] apply:maplist_([1287, 0], _113640, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1287, 0], [_151636|_151638], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1287, _151636)
^  Unify: (273) [user] mfix_vars1(1287, _151636)
   Call: (274) [system] var(1287)
^  Redo: (273) [user] mfix_vars1(1287, _151636)
^  Unify: (273) [user] mfix_vars1(1287, '$VAR'(_156282))
   Call: (274) [system] atom(1287)
^  Redo: (273) [user] mfix_vars1(1287, _151636)
^  Unify: (273) [user] mfix_vars1(1287, _151636)
   Call: (274) [system] 1287==true
^  Redo: (273) [user] mfix_vars1(1287, _151636)
^  Unify: (273) [user] mfix_vars1(1287, _151636)
   Call: (274) [system] 1287==false
^  Redo: (273) [user] mfix_vars1(1287, _151636)
^  Unify: (273) [user] mfix_vars1(1287, _151636)
   Call: (274) [system] 1287==[_165562, _165568]
^  Redo: (273) [user] mfix_vars1(1287, _151636)
^  Unify: (273) [user] mfix_vars1(1287, _151636)
   Call: (274) [system] is_list(1287)
^  Redo: (273) [user] mfix_vars1(1287, _151636)
^  Unify: (273) [user] mfix_vars1(1287, _151636)
   Call: (274) [system] string(1287)
^  Redo: (273) [user] mfix_vars1(1287, _151636)
^  Unify: (273) [user] mfix_vars1(1287, _151636)
   Call: (274) [system] compound(1287)
^  Redo: (273) [user] mfix_vars1(1287, _151636)
^  Unify: (273) [user] mfix_vars1(1287, _151636)
^  Call: (274) [user] symbol(1287)
^  Unify: (274) [user] symbol(1287)
   Call: (275) [system] atom(1287)
   Fail: (275) [system] atom(1287)
^  Fail: (274) [user] symbol(1287)
^  Redo: (273) [user] mfix_vars1(1287, _151636)
   Call: (274) [system] 1287=_151636
   Exit: (274) [system] 1287=1287
^  Exit: (273) [user] mfix_vars1(1287, 1287)
   Call: (273) [apply] apply:maplist_([0], _151638, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_185962|_185964], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _185962)
^  Unify: (274) [user] mfix_vars1(0, _185962)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _185962)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_190608))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _185962)
^  Unify: (274) [user] mfix_vars1(0, _185962)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _185962)
^  Unify: (274) [user] mfix_vars1(0, _185962)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _185962)
^  Unify: (274) [user] mfix_vars1(0, _185962)
   Call: (275) [system] 0==[_199888, _199894]
^  Redo: (274) [user] mfix_vars1(0, _185962)
^  Unify: (274) [user] mfix_vars1(0, _185962)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _185962)
^  Unify: (274) [user] mfix_vars1(0, _185962)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _185962)
^  Unify: (274) [user] mfix_vars1(0, _185962)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _185962)
^  Unify: (274) [user] mfix_vars1(0, _185962)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _185962)
   Call: (275) [system] 0=_185962
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _185964, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1287, 0], [1287, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    }", 1287, 0], [";;    }", 1287, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1287, 0], [";;    }", 1287, 0])
   Call: (270) [system] compound_name_arguments(_80136, '$COMMENT', [";;    }", 1287, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1287, 0), '$COMMENT', [";;    }", 1287, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1287, 0)\=@='$COMMENT'(";;    }", 1287, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1287, 0), _74550)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    }", 1287, 0), _236136))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1287, 0), _236136))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1287, 0), _236136))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1287, 0), _236136))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1287, 0), _236136)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1287, 0), _236136)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    }", 1287, 0), _241722))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1287, 0), _241722))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    }", 1287, 0), _241722)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1287, 0), _241722)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    }", 1287, 0), _241722)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1287, 0)\=@='$COMMENT'(";;    }", 1287, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1287, 0), _236136)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    }", 1287, 0), _68938))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1287, 0), _68938))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1287, 0), _68938))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1287, 0), _68938))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1287, 0), _68938)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1287, 0), _68938)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    }", 1287, 0), _264042))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1287, 0), _264042))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    }", 1287, 0), _264042)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1287, 0), _264042)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    }", 1287, 0), _264042)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1287, 0)\=@='$COMMENT'(";;    }", 1287, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1287, 0), _68938)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0)))
   Call: (261) [system] '$COMMENT'(";;    }", 1287, 0)\=@='$COMMENT'(";;    }", 1287, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1287, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1287, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1287, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1287, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1287, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    }", 1287, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    }", 1287, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    }", 1287, 0), _292820, [], _292822)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    }", 1287, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1287, 0), _292820, [], _292822)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1287, 0), _292820, [], _292822)
   Call: (258) [system] atom('$COMMENT'(";;    }", 1287, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1287, 0), _292820, [], _292822)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1287, 0), _292820, [], _292822)
   Call: (258) [system] compound('$COMMENT'(";;    }", 1287, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    }", 1287, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1287, 0), _302136, _302138)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1287, 0), '$COMMENT', [";;    }", 1287, 0])
^  Call: (258) [user] subst_vars([";;    }", 1287, 0], _304022, [], _292822)
^  Unify: (258) [user] subst_vars([";;    }", 1287, 0], [";;    }", 1287, 0], [], [])
   Call: (259) [system] var([";;    }", 1287, 0])
^  Redo: (258) [user] subst_vars([";;    }", 1287, 0], _304022, [], _292822)
^  Unify: (258) [user] subst_vars([";;    }", 1287, 0], [_307758|_307760], [], _292822)
^  Call: (259) [user] subst_vars(";;    }", _307758, [], _308698)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
   Call: (260) [system] var(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _307758, [], _308698)
^  Unify: (259) [user] subst_vars(";;    }", _307758, [], _308698)
   Call: (260) [system] atom(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _307758, [], _308698)
^  Unify: (259) [user] subst_vars(";;    }", _307758, [], _308698)
   Call: (260) [system] compound(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _307758, [], _308698)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Exit: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Call: (259) [user] subst_vars([1287, 0], _307760, [], _292822)
^  Unify: (259) [user] subst_vars([1287, 0], [1287, 0], [], [])
   Call: (260) [system] var([1287, 0])
^  Redo: (259) [user] subst_vars([1287, 0], _307760, [], _292822)
^  Unify: (259) [user] subst_vars([1287, 0], [_323630|_323632], [], _292822)
^  Call: (260) [user] subst_vars(1287, _323630, [], _324570)
^  Unify: (260) [user] subst_vars(1287, 1287, [], [])
   Call: (261) [system] var(1287)
^  Redo: (260) [user] subst_vars(1287, _323630, [], _324570)
^  Unify: (260) [user] subst_vars(1287, _323630, [], _324570)
   Call: (261) [system] atom(1287)
^  Redo: (260) [user] subst_vars(1287, _323630, [], _324570)
^  Unify: (260) [user] subst_vars(1287, _323630, [], _324570)
   Call: (261) [system] compound(1287)
^  Redo: (260) [user] subst_vars(1287, _323630, [], _324570)
^  Unify: (260) [user] subst_vars(1287, 1287, [], [])
^  Exit: (260) [user] subst_vars(1287, 1287, [], [])
^  Call: (260) [user] subst_vars([0], _323632, [], _292822)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _323632, [], _292822)
^  Unify: (260) [user] subst_vars([0], [_339502|_339504], [], _292822)
^  Call: (261) [user] subst_vars(0, _339502, [], _340442)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _339502, [], _340442)
^  Unify: (261) [user] subst_vars(0, _339502, [], _340442)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _339502, [], _340442)
^  Unify: (261) [user] subst_vars(0, _339502, [], _340442)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _339502, [], _340442)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _339504, [], _292822)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _339504, [], _292822)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1287, 0], [1287, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    }", 1287, 0], [";;    }", 1287, 0], [], [])
   Call: (258) [system] compound_name_arguments(_292820, '$COMMENT', [";;    }", 1287, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1287, 0), '$COMMENT', [";;    }", 1287, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    }", 1287, 0), '$COMMENT'(";;    }", 1287, 0), [], [])
   Call: (257) [system] _362860=metta_file_buffer(+, '$COMMENT'(";;    }", 1287, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    }", 1287, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    }", 1287, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1287, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1287, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1287, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1287, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1287, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1287, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1288, 0, 46152, '$COMMENT'(";; Converted:", 1288, 0), '$stream_position'(46152, 1288, 0, 46152)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1288, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1288, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1288, 0), _415578))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1288, 0), _415578))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1288, 0), _415578)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1288, 0), _415578)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1288, 0), _415578)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1288, 0), _415578)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1288, 0), _421190))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1288, 0), _421190))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1288, 0), _421190))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1288, 0), _421190))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1288, 0), _421190)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1288, 0), _421190)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1288, 0), _426776))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1288, 0), _426776))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1288, 0), _426776)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1288, 0), _426776)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1288, 0), _426776)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1288, 0), _426776)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1288, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1288, 0), _426776)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1288, 0), '$VAR'(_434236))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1288, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1288, 0), _426776)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1288, 0), _426776)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1288, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1288, 0), _426776)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1288, 0), _426776)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1288, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1288, 0), _426776)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1288, 0), _426776)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1288, 0)==[_443516, _443522]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1288, 0), _426776)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1288, 0), _426776)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1288, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1288, 0), _426776)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1288, 0), _426776)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1288, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1288, 0), _426776)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1288, 0), _426776)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1288, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1288, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1288, 0), _453718, _453720)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1288, 0), '$COMMENT', [";; Converted:", 1288, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1288, 0], _457460)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1288, 0], _457460)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1288, 0], _457460, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1288, 0], [_460278|_460280], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _460278)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _460278)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _460278)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_464924))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _460278)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _460278)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _460278)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _460278)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _460278)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _460278)
   Call: (273) [system] ";; Converted:"==[_474204, _474210]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _460278)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _460278)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _460278)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _460278)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _460278)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _460278)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _460278)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _460278)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _460278)
   Call: (273) [system] ";; Converted:"=_460278
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1288, 0], _460280, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1288, 0], [_498276|_498278], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1288, _498276)
^  Unify: (273) [user] mfix_vars1(1288, _498276)
   Call: (274) [system] var(1288)
^  Redo: (273) [user] mfix_vars1(1288, _498276)
^  Unify: (273) [user] mfix_vars1(1288, '$VAR'(_502922))
   Call: (274) [system] atom(1288)
^  Redo: (273) [user] mfix_vars1(1288, _498276)
^  Unify: (273) [user] mfix_vars1(1288, _498276)
   Call: (274) [system] 1288==true
^  Redo: (273) [user] mfix_vars1(1288, _498276)
^  Unify: (273) [user] mfix_vars1(1288, _498276)
   Call: (274) [system] 1288==false
^  Redo: (273) [user] mfix_vars1(1288, _498276)
^  Unify: (273) [user] mfix_vars1(1288, _498276)
   Call: (274) [system] 1288==[_512202, _512208]
^  Redo: (273) [user] mfix_vars1(1288, _498276)
^  Unify: (273) [user] mfix_vars1(1288, _498276)
   Call: (274) [system] is_list(1288)
^  Redo: (273) [user] mfix_vars1(1288, _498276)
^  Unify: (273) [user] mfix_vars1(1288, _498276)
   Call: (274) [system] string(1288)
^  Redo: (273) [user] mfix_vars1(1288, _498276)
^  Unify: (273) [user] mfix_vars1(1288, _498276)
   Call: (274) [system] compound(1288)
^  Redo: (273) [user] mfix_vars1(1288, _498276)
^  Unify: (273) [user] mfix_vars1(1288, _498276)
^  Call: (274) [user] symbol(1288)
^  Unify: (274) [user] symbol(1288)
   Call: (275) [system] atom(1288)
   Fail: (275) [system] atom(1288)
^  Fail: (274) [user] symbol(1288)
^  Redo: (273) [user] mfix_vars1(1288, _6030)
   Call: (274) [system] 1288=_6030
   Exit: (274) [system] 1288=1288
^  Exit: (273) [user] mfix_vars1(1288, 1288)
   Call: (273) [apply] apply:maplist_([0], _6032, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_14726|_14728], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _14726)
^  Unify: (274) [user] mfix_vars1(0, _14726)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _14726)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_19372))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _14726)
^  Unify: (274) [user] mfix_vars1(0, _14726)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _14726)
^  Unify: (274) [user] mfix_vars1(0, _14726)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _14726)
^  Unify: (274) [user] mfix_vars1(0, _14726)
   Call: (275) [system] 0==[_28652, _28658]
^  Redo: (274) [user] mfix_vars1(0, _14726)
^  Unify: (274) [user] mfix_vars1(0, _14726)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _14726)
^  Unify: (274) [user] mfix_vars1(0, _14726)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _14726)
^  Unify: (274) [user] mfix_vars1(0, _14726)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _14726)
^  Unify: (274) [user] mfix_vars1(0, _14726)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _14726)
   Call: (275) [system] 0=_14726
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _14728, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1288, 0], [1288, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1288, 0], [";; Converted:", 1288, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1288, 0], [";; Converted:", 1288, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";; Converted:", 1288, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1288, 0), '$COMMENT', [";; Converted:", 1288, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1288, 0)\=@='$COMMENT'(";; Converted:", 1288, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1288, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1288, 0), _64900))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1288, 0), _64900))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1288, 0), _64900))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1288, 0), _64900))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1288, 0), _64900)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1288, 0), _64900)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1288, 0), _70486))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1288, 0), _70486))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1288, 0), _70486)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1288, 0), _70486)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1288, 0), _70486)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1288, 0)\=@='$COMMENT'(";; Converted:", 1288, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1288, 0), _64900)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1288, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1288, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1288, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1288, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1288, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1288, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1288, 0), _92806))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1288, 0), _92806))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1288, 0), _92806)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1288, 0), _92806)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1288, 0), _92806)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1288, 0)\=@='$COMMENT'(";; Converted:", 1288, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1288, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1288, 0)\=@='$COMMENT'(";; Converted:", 1288, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1288, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1288, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1288, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1288, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1288, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1288, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1288, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1288, 0), _121584, [], _121586)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1288, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1288, 0), _121584, [], _121586)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1288, 0), _121584, [], _121586)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1288, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1288, 0), _121584, [], _121586)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1288, 0), _121584, [], _121586)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1288, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1288, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1288, 0), _130900, _130902)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1288, 0), '$COMMENT', [";; Converted:", 1288, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1288, 0], _132786, [], _121586)
^  Unify: (258) [user] subst_vars([";; Converted:", 1288, 0], [";; Converted:", 1288, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1288, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1288, 0], _132786, [], _121586)
^  Unify: (258) [user] subst_vars([";; Converted:", 1288, 0], [_136522|_136524], [], _121586)
^  Call: (259) [user] subst_vars(";; Converted:", _136522, [], _137462)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _136522, [], _137462)
^  Unify: (259) [user] subst_vars(";; Converted:", _136522, [], _137462)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _136522, [], _137462)
^  Unify: (259) [user] subst_vars(";; Converted:", _136522, [], _137462)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _136522, [], _137462)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1288, 0], _136524, [], _121586)
^  Unify: (259) [user] subst_vars([1288, 0], [1288, 0], [], [])
   Call: (260) [system] var([1288, 0])
^  Redo: (259) [user] subst_vars([1288, 0], _136524, [], _121586)
^  Unify: (259) [user] subst_vars([1288, 0], [_152394|_152396], [], _121586)
^  Call: (260) [user] subst_vars(1288, _152394, [], _153334)
^  Unify: (260) [user] subst_vars(1288, 1288, [], [])
   Call: (261) [system] var(1288)
^  Redo: (260) [user] subst_vars(1288, _152394, [], _153334)
^  Unify: (260) [user] subst_vars(1288, _152394, [], _153334)
   Call: (261) [system] atom(1288)
^  Redo: (260) [user] subst_vars(1288, _152394, [], _153334)
^  Unify: (260) [user] subst_vars(1288, _152394, [], _153334)
   Call: (261) [system] compound(1288)
^  Redo: (260) [user] subst_vars(1288, _152394, [], _153334)
^  Unify: (260) [user] subst_vars(1288, 1288, [], [])
^  Exit: (260) [user] subst_vars(1288, 1288, [], [])
^  Call: (260) [user] subst_vars([0], _152396, [], _121586)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _152396, [], _121586)
^  Unify: (260) [user] subst_vars([0], [_168266|_168268], [], _121586)
^  Call: (261) [user] subst_vars(0, _168266, [], _169206)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _168266, [], _169206)
^  Unify: (261) [user] subst_vars(0, _168266, [], _169206)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _168266, [], _169206)
^  Unify: (261) [user] subst_vars(0, _168266, [], _169206)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _168266, [], _169206)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _168268, [], _121586)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _168268, [], _121586)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1288, 0], [1288, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1288, 0], [";; Converted:", 1288, 0], [], [])
   Call: (258) [system] compound_name_arguments(_121584, '$COMMENT', [";; Converted:", 1288, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1288, 0), '$COMMENT', [";; Converted:", 1288, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1288, 0), '$COMMENT'(";; Converted:", 1288, 0), [], [])
   Call: (257) [system] _191624=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1288, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1288, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1288, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1288, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1288, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1288, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1288, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1288, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1288, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1292, 0, 46255, '$COMMENT'(";; Original:", 1292, 0), '$stream_position'(46255, 1292, 0, 46255)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1292, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1292, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1292, 0), _244342))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1292, 0), _244342))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1292, 0), _244342)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1292, 0), _244342)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1292, 0), _244342)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1292, 0), _244342)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1292, 0), _249954))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1292, 0), _249954))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1292, 0), _249954))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1292, 0), _249954))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1292, 0), _249954)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1292, 0), _249954)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1292, 0), _255540))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1292, 0), _255540))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1292, 0), _255540)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1292, 0), _255540)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1292, 0), _255540)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1292, 0), _255540)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1292, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1292, 0), _255540)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1292, 0), '$VAR'(_263000))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1292, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1292, 0), _255540)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1292, 0), _255540)
   Call: (270) [system] '$COMMENT'(";; Original:", 1292, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1292, 0), _255540)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1292, 0), _255540)
   Call: (270) [system] '$COMMENT'(";; Original:", 1292, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1292, 0), _255540)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1292, 0), _255540)
   Call: (270) [system] '$COMMENT'(";; Original:", 1292, 0)==[_272280, _272286]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1292, 0), _255540)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1292, 0), _255540)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1292, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1292, 0), _255540)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1292, 0), _255540)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1292, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1292, 0), _255540)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1292, 0), _255540)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1292, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1292, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1292, 0), _282482, _282484)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1292, 0), '$COMMENT', [";; Original:", 1292, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1292, 0], _286224)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1292, 0], _286224)
   Call: (271) [apply] apply:maplist_([";; Original:", 1292, 0], _286224, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1292, 0], [_289042|_289044], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _289042)
^  Unify: (272) [user] mfix_vars1(";; Original:", _289042)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _289042)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_293688))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _289042)
^  Unify: (272) [user] mfix_vars1(";; Original:", _289042)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _289042)
^  Unify: (272) [user] mfix_vars1(";; Original:", _289042)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _289042)
^  Unify: (272) [user] mfix_vars1(";; Original:", _289042)
   Call: (273) [system] ";; Original:"==[_302968, _302974]
^  Redo: (272) [user] mfix_vars1(";; Original:", _289042)
^  Unify: (272) [user] mfix_vars1(";; Original:", _289042)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _289042)
^  Unify: (272) [user] mfix_vars1(";; Original:", _289042)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _289042)
^  Unify: (272) [user] mfix_vars1(";; Original:", _289042)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _289042)
^  Unify: (272) [user] mfix_vars1(";; Original:", _289042)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _289042)
   Call: (273) [system] ";; Original:"=_289042
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1292, 0], _289044, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1292, 0], [_327040|_327042], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1292, _327040)
^  Unify: (273) [user] mfix_vars1(1292, _327040)
   Call: (274) [system] var(1292)
^  Redo: (273) [user] mfix_vars1(1292, _327040)
^  Unify: (273) [user] mfix_vars1(1292, '$VAR'(_331686))
   Call: (274) [system] atom(1292)
^  Redo: (273) [user] mfix_vars1(1292, _327040)
^  Unify: (273) [user] mfix_vars1(1292, _327040)
   Call: (274) [system] 1292==true
^  Redo: (273) [user] mfix_vars1(1292, _327040)
^  Unify: (273) [user] mfix_vars1(1292, _327040)
   Call: (274) [system] 1292==false
^  Redo: (273) [user] mfix_vars1(1292, _327040)
^  Unify: (273) [user] mfix_vars1(1292, _327040)
   Call: (274) [system] 1292==[_340966, _340972]
^  Redo: (273) [user] mfix_vars1(1292, _327040)
^  Unify: (273) [user] mfix_vars1(1292, _327040)
   Call: (274) [system] is_list(1292)
^  Redo: (273) [user] mfix_vars1(1292, _327040)
^  Unify: (273) [user] mfix_vars1(1292, _327040)
   Call: (274) [system] string(1292)
^  Redo: (273) [user] mfix_vars1(1292, _327040)
^  Unify: (273) [user] mfix_vars1(1292, _327040)
   Call: (274) [system] compound(1292)
^  Redo: (273) [user] mfix_vars1(1292, _327040)
^  Unify: (273) [user] mfix_vars1(1292, _327040)
^  Call: (274) [user] symbol(1292)
^  Unify: (274) [user] symbol(1292)
   Call: (275) [system] atom(1292)
   Fail: (275) [system] atom(1292)
^  Fail: (274) [user] symbol(1292)
^  Redo: (273) [user] mfix_vars1(1292, _327040)
   Call: (274) [system] 1292=_327040
   Exit: (274) [system] 1292=1292
^  Exit: (273) [user] mfix_vars1(1292, 1292)
   Call: (273) [apply] apply:maplist_([0], _327042, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_361366|_361368], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _361366)
^  Unify: (274) [user] mfix_vars1(0, _361366)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _361366)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_366012))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _361366)
^  Unify: (274) [user] mfix_vars1(0, _361366)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _361366)
^  Unify: (274) [user] mfix_vars1(0, _361366)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _361366)
^  Unify: (274) [user] mfix_vars1(0, _361366)
   Call: (275) [system] 0==[_375292, _375298]
^  Redo: (274) [user] mfix_vars1(0, _361366)
^  Unify: (274) [user] mfix_vars1(0, _361366)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _361366)
^  Unify: (274) [user] mfix_vars1(0, _361366)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _361366)
^  Unify: (274) [user] mfix_vars1(0, _361366)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _361366)
^  Unify: (274) [user] mfix_vars1(0, _361366)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _361366)
   Call: (275) [system] 0=_361366
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _361368, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1292, 0], [1292, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1292, 0], [";; Original:", 1292, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1292, 0], [";; Original:", 1292, 0])
   Call: (270) [system] compound_name_arguments(_255540, '$COMMENT', [";; Original:", 1292, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1292, 0), '$COMMENT', [";; Original:", 1292, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1292, 0)\=@='$COMMENT'(";; Original:", 1292, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1292, 0), _249954)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1292, 0), _411540))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1292, 0), _411540))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1292, 0), _411540))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1292, 0), _411540))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1292, 0), _411540)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1292, 0), _411540)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1292, 0), _417126))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1292, 0), _417126))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1292, 0), _417126)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1292, 0), _417126)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1292, 0), _417126)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1292, 0)\=@='$COMMENT'(";; Original:", 1292, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1292, 0), _411540)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1292, 0), _244342))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1292, 0), _244342))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1292, 0), _244342))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1292, 0), _244342))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1292, 0), _244342)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1292, 0), _244342)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1292, 0), _439446))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1292, 0), _439446))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1292, 0), _439446)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1292, 0), _439446)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1292, 0), _439446)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1292, 0)\=@='$COMMENT'(";; Original:", 1292, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1292, 0), _244342)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1292, 0)\=@='$COMMENT'(";; Original:", 1292, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1292, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1292, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1292, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1292, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1292, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1292, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1292, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1292, 0), _468224, [], _468226)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1292, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1292, 0), _468224, [], _468226)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1292, 0), _468224, [], _468226)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1292, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1292, 0), _468224, [], _468226)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1292, 0), _468224, [], _468226)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1292, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1292, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1292, 0), _477540, _477542)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1292, 0), '$COMMENT', [";; Original:", 1292, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1292, 0], _479426, [], _468226)
^  Unify: (258) [user] subst_vars([";; Original:", 1292, 0], [";; Original:", 1292, 0], [], [])
   Call: (259) [system] var([";; Original:", 1292, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1292, 0], _479426, [], _468226)
^  Unify: (258) [user] subst_vars([";; Original:", 1292, 0], [_483162|_483164], [], _468226)
^  Call: (259) [user] subst_vars(";; Original:", _483162, [], _484102)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _483162, [], _484102)
^  Unify: (259) [user] subst_vars(";; Original:", _483162, [], _484102)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _483162, [], _484102)
^  Unify: (259) [user] subst_vars(";; Original:", _483162, [], _484102)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _483162, [], _484102)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1292, 0], _483164, [], _468226)
^  Unify: (259) [user] subst_vars([1292, 0], [1292, 0], [], [])
   Call: (260) [system] var([1292, 0])
^  Redo: (259) [user] subst_vars([1292, 0], _483164, [], _468226)
^  Unify: (259) [user] subst_vars([1292, 0], [_499034|_499036], [], _468226)
^  Call: (260) [user] subst_vars(1292, _499034, [], _499974)
^  Unify: (260) [user] subst_vars(1292, 1292, [], [])
   Call: (261) [system] var(1292)
^  Redo: (260) [user] subst_vars(1292, _499034, [], _499974)
^  Unify: (260) [user] subst_vars(1292, _499034, [], _499974)
   Call: (261) [system] atom(1292)
^  Redo: (260) [user] subst_vars(1292, _499034, [], _499974)
^  Unify: (260) [user] subst_vars(1292, _499034, [], _499974)
   Call: (261) [system] compound(1292)
^  Redo: (260) [user] subst_vars(1292, _499034, [], _499974)
^  Unify: (260) [user] subst_vars(1292, 1292, [], [])
^  Exit: (260) [user] subst_vars(1292, 1292, [], [])
^  Call: (260) [user] subst_vars([0], _499036, [], _468226)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _499036, [], _468226)
^  Unify: (260) [user] subst_vars([0], [_514906|_514908], [], _468226)
^  Call: (261) [user] subst_vars(0, _514906, [], _515846)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _514906, [], _515846)
^  Unify: (261) [user] subst_vars(0, _514906, [], _515846)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _514906, [], _515846)
^  Unify: (261) [user] subst_vars(0, _514906, [], _515846)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _5984, [], _5988)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _5986, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _5986, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1292, 0], [1292, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1292, 0], [";; Original:", 1292, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5938, '$COMMENT', [";; Original:", 1292, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1292, 0), '$COMMENT', [";; Original:", 1292, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1292, 0), '$COMMENT'(";; Original:", 1292, 0), [], [])
   Call: (257) [system] _20368=metta_file_buffer(+, '$COMMENT'(";; Original:", 1292, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1292, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1292, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1292, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1292, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1292, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1292, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1292, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1292, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1293, 0, 46268, '$COMMENT'(";;    #[test]", 1293, 0), '$stream_position'(46268, 1293, 0, 46268)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1293, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1293, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1293, 0), _73086))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1293, 0), _73086))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1293, 0), _73086)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1293, 0), _73086)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1293, 0), _73086)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1293, 0), _73086)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1293, 0), _78698))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1293, 0), _78698))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1293, 0), _78698))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1293, 0), _78698))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1293, 0), _78698)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1293, 0), _78698)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    #[test]", 1293, 0), _84284))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1293, 0), _84284))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    #[test]", 1293, 0), _84284)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1293, 0), _84284)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1293, 0), _84284)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1293, 0), _84284)
   Call: (270) [system] var('$COMMENT'(";;    #[test]", 1293, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1293, 0), _84284)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1293, 0), '$VAR'(_91744))
   Call: (270) [system] atom('$COMMENT'(";;    #[test]", 1293, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1293, 0), _84284)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1293, 0), _84284)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1293, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1293, 0), _84284)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1293, 0), _84284)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1293, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1293, 0), _84284)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1293, 0), _84284)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1293, 0)==[_101024, _101030]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1293, 0), _84284)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1293, 0), _84284)
   Call: (270) [system] is_list('$COMMENT'(";;    #[test]", 1293, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1293, 0), _84284)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1293, 0), _84284)
   Call: (270) [system] string('$COMMENT'(";;    #[test]", 1293, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1293, 0), _84284)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1293, 0), _84284)
   Call: (270) [system] compound('$COMMENT'(";;    #[test]", 1293, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    #[test]", 1293, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1293, 0), _111226, _111228)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT', [";;    #[test]", 1293, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    #[test]", 1293, 0], _114968)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1293, 0], _114968)
   Call: (271) [apply] apply:maplist_([";;    #[test]", 1293, 0], _114968, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    #[test]", 1293, 0], [_117786|_117788], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    #[test]", _117786)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _117786)
   Call: (273) [system] var(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _117786)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", '$VAR'(_122432))
   Call: (273) [system] atom(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _117786)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _117786)
   Call: (273) [system] ";;    #[test]"==true
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _117786)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _117786)
   Call: (273) [system] ";;    #[test]"==false
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _117786)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _117786)
   Call: (273) [system] ";;    #[test]"==[_131712, _131718]
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _117786)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _117786)
   Call: (273) [system] is_list(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _117786)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _117786)
   Call: (273) [system] string(";;    #[test]")
   Exit: (273) [system] string(";;    #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _117786)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _117786)
   Call: (273) [system] compound(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _117786)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _117786)
^  Call: (273) [user] symbol(";;    #[test]")
^  Unify: (273) [user] symbol(";;    #[test]")
   Call: (274) [system] atom(";;    #[test]")
   Fail: (274) [system] atom(";;    #[test]")
^  Fail: (273) [user] symbol(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _117786)
   Call: (273) [system] ";;    #[test]"=_117786
   Exit: (273) [system] ";;    #[test]"=";;    #[test]"
^  Exit: (272) [user] mfix_vars1(";;    #[test]", ";;    #[test]")
   Call: (272) [apply] apply:maplist_([1293, 0], _117788, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1293, 0], [_155784|_155786], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1293, _155784)
^  Unify: (273) [user] mfix_vars1(1293, _155784)
   Call: (274) [system] var(1293)
^  Redo: (273) [user] mfix_vars1(1293, _155784)
^  Unify: (273) [user] mfix_vars1(1293, '$VAR'(_160430))
   Call: (274) [system] atom(1293)
^  Redo: (273) [user] mfix_vars1(1293, _155784)
^  Unify: (273) [user] mfix_vars1(1293, _155784)
   Call: (274) [system] 1293==true
^  Redo: (273) [user] mfix_vars1(1293, _155784)
^  Unify: (273) [user] mfix_vars1(1293, _155784)
   Call: (274) [system] 1293==false
^  Redo: (273) [user] mfix_vars1(1293, _155784)
^  Unify: (273) [user] mfix_vars1(1293, _155784)
   Call: (274) [system] 1293==[_169710, _169716]
^  Redo: (273) [user] mfix_vars1(1293, _155784)
^  Unify: (273) [user] mfix_vars1(1293, _155784)
   Call: (274) [system] is_list(1293)
^  Redo: (273) [user] mfix_vars1(1293, _155784)
^  Unify: (273) [user] mfix_vars1(1293, _155784)
   Call: (274) [system] string(1293)
^  Redo: (273) [user] mfix_vars1(1293, _155784)
^  Unify: (273) [user] mfix_vars1(1293, _155784)
   Call: (274) [system] compound(1293)
^  Redo: (273) [user] mfix_vars1(1293, _155784)
^  Unify: (273) [user] mfix_vars1(1293, _155784)
^  Call: (274) [user] symbol(1293)
^  Unify: (274) [user] symbol(1293)
   Call: (275) [system] atom(1293)
   Fail: (275) [system] atom(1293)
^  Fail: (274) [user] symbol(1293)
^  Redo: (273) [user] mfix_vars1(1293, _155784)
   Call: (274) [system] 1293=_155784
   Exit: (274) [system] 1293=1293
^  Exit: (273) [user] mfix_vars1(1293, 1293)
   Call: (273) [apply] apply:maplist_([0], _155786, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_190110|_190112], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _190110)
^  Unify: (274) [user] mfix_vars1(0, _190110)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _190110)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_194756))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _190110)
^  Unify: (274) [user] mfix_vars1(0, _190110)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _190110)
^  Unify: (274) [user] mfix_vars1(0, _190110)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _190110)
^  Unify: (274) [user] mfix_vars1(0, _190110)
   Call: (275) [system] 0==[_204036, _204042]
^  Redo: (274) [user] mfix_vars1(0, _190110)
^  Unify: (274) [user] mfix_vars1(0, _190110)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _190110)
^  Unify: (274) [user] mfix_vars1(0, _190110)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _190110)
^  Unify: (274) [user] mfix_vars1(0, _190110)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _190110)
^  Unify: (274) [user] mfix_vars1(0, _190110)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _190110)
   Call: (275) [system] 0=_190110
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _190112, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1293, 0], [1293, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    #[test]", 1293, 0], [";;    #[test]", 1293, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1293, 0], [";;    #[test]", 1293, 0])
   Call: (270) [system] compound_name_arguments(_84284, '$COMMENT', [";;    #[test]", 1293, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT', [";;    #[test]", 1293, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1293, 0)\=@='$COMMENT'(";;    #[test]", 1293, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1293, 0), _78698)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    #[test]", 1293, 0), _240284))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1293, 0), _240284))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1293, 0), _240284))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1293, 0), _240284))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1293, 0), _240284)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1293, 0), _240284)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    #[test]", 1293, 0), _245870))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1293, 0), _245870))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    #[test]", 1293, 0), _245870)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1293, 0), _245870)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1293, 0), _245870)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1293, 0)\=@='$COMMENT'(";;    #[test]", 1293, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1293, 0), _240284)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    #[test]", 1293, 0), _73086))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1293, 0), _73086))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1293, 0), _73086))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1293, 0), _73086))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1293, 0), _73086)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1293, 0), _73086)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    #[test]", 1293, 0), _268190))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1293, 0), _268190))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    #[test]", 1293, 0), _268190)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1293, 0), _268190)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1293, 0), _268190)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1293, 0)\=@='$COMMENT'(";;    #[test]", 1293, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1293, 0), _73086)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0)))
   Call: (261) [system] '$COMMENT'(";;    #[test]", 1293, 0)\=@='$COMMENT'(";;    #[test]", 1293, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1293, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1293, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1293, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1293, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1293, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1293, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1293, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1293, 0), _296968, [], _296970)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    #[test]", 1293, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1293, 0), _296968, [], _296970)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1293, 0), _296968, [], _296970)
   Call: (258) [system] atom('$COMMENT'(";;    #[test]", 1293, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1293, 0), _296968, [], _296970)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1293, 0), _296968, [], _296970)
   Call: (258) [system] compound('$COMMENT'(";;    #[test]", 1293, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    #[test]", 1293, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1293, 0), _306284, _306286)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT', [";;    #[test]", 1293, 0])
^  Call: (258) [user] subst_vars([";;    #[test]", 1293, 0], _308170, [], _296970)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1293, 0], [";;    #[test]", 1293, 0], [], [])
   Call: (259) [system] var([";;    #[test]", 1293, 0])
^  Redo: (258) [user] subst_vars([";;    #[test]", 1293, 0], _308170, [], _296970)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1293, 0], [_311906|_311908], [], _296970)
^  Call: (259) [user] subst_vars(";;    #[test]", _311906, [], _312846)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
   Call: (260) [system] var(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _311906, [], _312846)
^  Unify: (259) [user] subst_vars(";;    #[test]", _311906, [], _312846)
   Call: (260) [system] atom(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _311906, [], _312846)
^  Unify: (259) [user] subst_vars(";;    #[test]", _311906, [], _312846)
   Call: (260) [system] compound(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _311906, [], _312846)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Exit: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Call: (259) [user] subst_vars([1293, 0], _311908, [], _296970)
^  Unify: (259) [user] subst_vars([1293, 0], [1293, 0], [], [])
   Call: (260) [system] var([1293, 0])
^  Redo: (259) [user] subst_vars([1293, 0], _311908, [], _296970)
^  Unify: (259) [user] subst_vars([1293, 0], [_327778|_327780], [], _296970)
^  Call: (260) [user] subst_vars(1293, _327778, [], _328718)
^  Unify: (260) [user] subst_vars(1293, 1293, [], [])
   Call: (261) [system] var(1293)
^  Redo: (260) [user] subst_vars(1293, _327778, [], _328718)
^  Unify: (260) [user] subst_vars(1293, _327778, [], _328718)
   Call: (261) [system] atom(1293)
^  Redo: (260) [user] subst_vars(1293, _327778, [], _328718)
^  Unify: (260) [user] subst_vars(1293, _327778, [], _328718)
   Call: (261) [system] compound(1293)
^  Redo: (260) [user] subst_vars(1293, _327778, [], _328718)
^  Unify: (260) [user] subst_vars(1293, 1293, [], [])
^  Exit: (260) [user] subst_vars(1293, 1293, [], [])
^  Call: (260) [user] subst_vars([0], _327780, [], _296970)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _327780, [], _296970)
^  Unify: (260) [user] subst_vars([0], [_343650|_343652], [], _296970)
^  Call: (261) [user] subst_vars(0, _343650, [], _344590)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _343650, [], _344590)
^  Unify: (261) [user] subst_vars(0, _343650, [], _344590)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _343650, [], _344590)
^  Unify: (261) [user] subst_vars(0, _343650, [], _344590)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _343650, [], _344590)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _343652, [], _296970)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _343652, [], _296970)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1293, 0], [1293, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    #[test]", 1293, 0], [";;    #[test]", 1293, 0], [], [])
   Call: (258) [system] compound_name_arguments(_296968, '$COMMENT', [";;    #[test]", 1293, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT', [";;    #[test]", 1293, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1293, 0), '$COMMENT'(";;    #[test]", 1293, 0), [], [])
   Call: (257) [system] _367008=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1293, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1293, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1293, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1293, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1293, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1293, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1293, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1293, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1293, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1294, 0, 46282, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$stream_position'(46282, 1294, 0, 46282)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _419740))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _419740))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _419740)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _419740)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _419740)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _419740)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _425352))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _425352))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _425352))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _425352))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _425352)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _425352)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _430938))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _430938))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _430938)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _430938)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _430938)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _430938)
   Call: (270) [system] var('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _430938)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$VAR'(_438398))
   Call: (270) [system] atom('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _430938)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _430938)
   Call: (270) [system] '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _430938)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _430938)
   Call: (270) [system] '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _430938)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _430938)
   Call: (270) [system] '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0)==[_447678, _447684]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _430938)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _430938)
   Call: (270) [system] is_list('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _430938)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _430938)
   Call: (270) [system] string('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _430938)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _430938)
   Call: (270) [system] compound('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _457880, _457882)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT', [";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0], _461622)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0], _461622)
   Call: (271) [apply] apply:maplist_([";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0], _461622, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0], [_464440|_464442], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    fn let_op_internal_variables_has_priority_in_template() {", _464440)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_internal_variables_has_priority_in_template() {", _464440)
   Call: (273) [system] var(";;    fn let_op_internal_variables_has_priority_in_template() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_internal_variables_has_priority_in_template() {", _464440)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_internal_variables_has_priority_in_template() {", '$VAR'(_469086))
   Call: (273) [system] atom(";;    fn let_op_internal_variables_has_priority_in_template() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_internal_variables_has_priority_in_template() {", _464440)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_internal_variables_has_priority_in_template() {", _464440)
   Call: (273) [system] ";;    fn let_op_internal_variables_has_priority_in_template() {"==true
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_internal_variables_has_priority_in_template() {", _464440)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_internal_variables_has_priority_in_template() {", _464440)
   Call: (273) [system] ";;    fn let_op_internal_variables_has_priority_in_template() {"==false
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_internal_variables_has_priority_in_template() {", _464440)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_internal_variables_has_priority_in_template() {", _464440)
   Call: (273) [system] ";;    fn let_op_internal_variables_has_priority_in_template() {"==[_478366, _478372]
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_internal_variables_has_priority_in_template() {", _464440)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_internal_variables_has_priority_in_template() {", _464440)
   Call: (273) [system] is_list(";;    fn let_op_internal_variables_has_priority_in_template() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_internal_variables_has_priority_in_template() {", _464440)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_internal_variables_has_priority_in_template() {", _464440)
   Call: (273) [system] string(";;    fn let_op_internal_variables_has_priority_in_template() {")
   Exit: (273) [system] string(";;    fn let_op_internal_variables_has_priority_in_template() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_internal_variables_has_priority_in_template() {", _464440)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_internal_variables_has_priority_in_template() {", _464440)
   Call: (273) [system] compound(";;    fn let_op_internal_variables_has_priority_in_template() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_internal_variables_has_priority_in_template() {", _464440)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_internal_variables_has_priority_in_template() {", _464440)
^  Call: (273) [user] symbol(";;    fn let_op_internal_variables_has_priority_in_template() {")
^  Unify: (273) [user] symbol(";;    fn let_op_internal_variables_has_priority_in_template() {")
   Call: (274) [system] atom(";;    fn let_op_internal_variables_has_priority_in_template() {")
   Fail: (274) [system] atom(";;    fn let_op_internal_variables_has_priority_in_template() {")
^  Fail: (273) [user] symbol(";;    fn let_op_internal_variables_has_priority_in_template() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_internal_variables_has_priority_in_template() {", _464440)
   Call: (273) [system] ";;    fn let_op_internal_variables_has_priority_in_template() {"=_464440
   Exit: (273) [system] ";;    fn let_op_internal_variables_has_priority_in_template() {"=";;    fn let_op_internal_variables_has_priority_in_template() {"
^  Exit: (272) [user] mfix_vars1(";;    fn let_op_internal_variables_has_priority_in_template() {", ";;    fn let_op_internal_variables_has_priority_in_template() {")
   Call: (272) [apply] apply:maplist_([1294, 0], _464442, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1294, 0], [_502438|_502440], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1294, _502438)
^  Unify: (273) [user] mfix_vars1(1294, _502438)
   Call: (274) [system] var(1294)
^  Redo: (273) [user] mfix_vars1(1294, _502438)
^  Unify: (273) [user] mfix_vars1(1294, '$VAR'(_507084))
   Call: (274) [system] atom(1294)
^  Redo: (273) [user] mfix_vars1(1294, _502438)
^  Unify: (273) [user] mfix_vars1(1294, _502438)
   Call: (274) [system] 1294==true
^  Redo: (273) [user] mfix_vars1(1294, _502438)
^  Unify: (273) [user] mfix_vars1(1294, _502438)
   Call: (274) [system] 1294==false
^  Redo: (273) [user] mfix_vars1(1294, _502438)
^  Unify: (273) [user] mfix_vars1(1294, _502438)
   Call: (274) [system] 1294==[_516364, _516370]
^  Redo: (273) [user] mfix_vars1(1294, _502438)
^  Unify: (273) [user] mfix_vars1(1294, _502438)
   Call: (274) [system] is_list(1294)
^  Redo: (273) [user] mfix_vars1(1294, _502438)
^  Unify: (273) [user] mfix_vars1(1294, _502438)
   Call: (274) [system] string(1294)
^  Redo: (273) [user] mfix_vars1(1294, _502438)
^  Unify: (273) [user] mfix_vars1(1294, _6044)
   Call: (274) [system] compound(1294)
^  Redo: (273) [user] mfix_vars1(1294, _6044)
^  Unify: (273) [user] mfix_vars1(1294, _6044)
^  Call: (274) [user] symbol(1294)
^  Unify: (274) [user] symbol(1294)
   Call: (275) [system] atom(1294)
   Fail: (275) [system] atom(1294)
^  Fail: (274) [user] symbol(1294)
^  Redo: (273) [user] mfix_vars1(1294, _6044)
   Call: (274) [system] 1294=_6044
   Exit: (274) [system] 1294=1294
^  Exit: (273) [user] mfix_vars1(1294, 1294)
   Call: (273) [apply] apply:maplist_([0], _6046, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_18842|_18844], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _18842)
^  Unify: (274) [user] mfix_vars1(0, _18842)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _18842)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_23488))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _18842)
^  Unify: (274) [user] mfix_vars1(0, _18842)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _18842)
^  Unify: (274) [user] mfix_vars1(0, _18842)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _18842)
^  Unify: (274) [user] mfix_vars1(0, _18842)
   Call: (275) [system] 0==[_32768, _32774]
^  Redo: (274) [user] mfix_vars1(0, _18842)
^  Unify: (274) [user] mfix_vars1(0, _18842)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _18842)
^  Unify: (274) [user] mfix_vars1(0, _18842)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _18842)
^  Unify: (274) [user] mfix_vars1(0, _18842)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _18842)
^  Unify: (274) [user] mfix_vars1(0, _18842)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _18842)
   Call: (275) [system] 0=_18842
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _18844, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1294, 0], [1294, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0], [";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0], [";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0])
   Call: (270) [system] compound_name_arguments(_5992, '$COMMENT', [";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT', [";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0)\=@='$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _5978)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _69016))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _69016))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _69016))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _69016))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _69016)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _69016)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _74602))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _74602))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _74602)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _74602)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _74602)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0)\=@='$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _69016)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _5958))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _5958))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _5958))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _5958))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _5958)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _5958)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _96922))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _96922))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _96922)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _96922)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _96922)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0)\=@='$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _5958)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0)))
   Call: (261) [system] '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0)\=@='$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _125700, [], _125702)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _125700, [], _125702)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _125700, [], _125702)
   Call: (258) [system] atom('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _125700, [], _125702)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _125700, [], _125702)
   Call: (258) [system] compound('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), _135016, _135018)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT', [";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0])
^  Call: (258) [user] subst_vars([";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0], _136902, [], _125702)
^  Unify: (258) [user] subst_vars([";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0], [";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0], [], [])
   Call: (259) [system] var([";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0])
^  Redo: (258) [user] subst_vars([";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0], _136902, [], _125702)
^  Unify: (258) [user] subst_vars([";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0], [_140638|_140640], [], _125702)
^  Call: (259) [user] subst_vars(";;    fn let_op_internal_variables_has_priority_in_template() {", _140638, [], _141578)
^  Unify: (259) [user] subst_vars(";;    fn let_op_internal_variables_has_priority_in_template() {", ";;    fn let_op_internal_variables_has_priority_in_template() {", [], [])
   Call: (260) [system] var(";;    fn let_op_internal_variables_has_priority_in_template() {")
^  Redo: (259) [user] subst_vars(";;    fn let_op_internal_variables_has_priority_in_template() {", _140638, [], _141578)
^  Unify: (259) [user] subst_vars(";;    fn let_op_internal_variables_has_priority_in_template() {", _140638, [], _141578)
   Call: (260) [system] atom(";;    fn let_op_internal_variables_has_priority_in_template() {")
^  Redo: (259) [user] subst_vars(";;    fn let_op_internal_variables_has_priority_in_template() {", _140638, [], _141578)
^  Unify: (259) [user] subst_vars(";;    fn let_op_internal_variables_has_priority_in_template() {", _140638, [], _141578)
   Call: (260) [system] compound(";;    fn let_op_internal_variables_has_priority_in_template() {")
^  Redo: (259) [user] subst_vars(";;    fn let_op_internal_variables_has_priority_in_template() {", _140638, [], _141578)
^  Unify: (259) [user] subst_vars(";;    fn let_op_internal_variables_has_priority_in_template() {", ";;    fn let_op_internal_variables_has_priority_in_template() {", [], [])
^  Exit: (259) [user] subst_vars(";;    fn let_op_internal_variables_has_priority_in_template() {", ";;    fn let_op_internal_variables_has_priority_in_template() {", [], [])
^  Call: (259) [user] subst_vars([1294, 0], _140640, [], _125702)
^  Unify: (259) [user] subst_vars([1294, 0], [1294, 0], [], [])
   Call: (260) [system] var([1294, 0])
^  Redo: (259) [user] subst_vars([1294, 0], _140640, [], _125702)
^  Unify: (259) [user] subst_vars([1294, 0], [_156510|_156512], [], _125702)
^  Call: (260) [user] subst_vars(1294, _156510, [], _157450)
^  Unify: (260) [user] subst_vars(1294, 1294, [], [])
   Call: (261) [system] var(1294)
^  Redo: (260) [user] subst_vars(1294, _156510, [], _157450)
^  Unify: (260) [user] subst_vars(1294, _156510, [], _157450)
   Call: (261) [system] atom(1294)
^  Redo: (260) [user] subst_vars(1294, _156510, [], _157450)
^  Unify: (260) [user] subst_vars(1294, _156510, [], _157450)
   Call: (261) [system] compound(1294)
^  Redo: (260) [user] subst_vars(1294, _156510, [], _157450)
^  Unify: (260) [user] subst_vars(1294, 1294, [], [])
^  Exit: (260) [user] subst_vars(1294, 1294, [], [])
^  Call: (260) [user] subst_vars([0], _156512, [], _125702)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _156512, [], _125702)
^  Unify: (260) [user] subst_vars([0], [_172382|_172384], [], _125702)
^  Call: (261) [user] subst_vars(0, _172382, [], _173322)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _172382, [], _173322)
^  Unify: (261) [user] subst_vars(0, _172382, [], _173322)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _172382, [], _173322)
^  Unify: (261) [user] subst_vars(0, _172382, [], _173322)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _172382, [], _173322)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _172384, [], _125702)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _172384, [], _125702)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1294, 0], [1294, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0], [";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0], [], [])
   Call: (258) [system] compound_name_arguments(_125700, '$COMMENT', [";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT', [";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), [], [])
   Call: (257) [system] _195740=metta_file_buffer(+, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_op_internal_variables_has_priority_in_template() {", 1294, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1295, 0, 46346, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$stream_position'(46346, 1295, 0, 46346)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _248476))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _248476))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _248476)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _248476)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _248476)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _248476)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _254088))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _254088))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _254088))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _254088))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _254088)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _254088)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _259674))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _259674))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _259674)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _259674)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _259674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _259674)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _259674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$VAR'(_267134))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _259674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _259674)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _259674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _259674)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _259674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _259674)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0)==[_276414, _276420]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _259674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _259674)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _259674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _259674)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _259674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _259674)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _286616, _286618)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0], _290358)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0], _290358)
   Call: (271) [apply] apply:maplist_([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0], _290358, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0], [_293176|_293178], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _293176)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _293176)
   Call: (273) [system] var(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _293176)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", '$VAR'(_297822))
   Call: (273) [system] atom(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _293176)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _293176)
   Call: (273) [system] ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _293176)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _293176)
   Call: (273) [system] ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _293176)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _293176)
   Call: (273) [system] ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),"==[_307102, _307108]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _293176)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _293176)
   Call: (273) [system] is_list(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _293176)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _293176)
   Call: (273) [system] string(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),")
   Exit: (273) [system] string(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _293176)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _293176)
   Call: (273) [system] compound(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _293176)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _293176)
^  Call: (273) [user] symbol(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),")
^  Unify: (273) [user] symbol(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),")
   Call: (274) [system] atom(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),")
   Fail: (274) [system] atom(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),")
^  Fail: (273) [user] symbol(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _293176)
   Call: (273) [system] ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),"=_293176
   Exit: (273) [system] ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),"=";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),")
   Call: (272) [apply] apply:maplist_([1295, 0], _293178, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1295, 0], [_331174|_331176], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1295, _331174)
^  Unify: (273) [user] mfix_vars1(1295, _331174)
   Call: (274) [system] var(1295)
^  Redo: (273) [user] mfix_vars1(1295, _331174)
^  Unify: (273) [user] mfix_vars1(1295, '$VAR'(_335820))
   Call: (274) [system] atom(1295)
^  Redo: (273) [user] mfix_vars1(1295, _331174)
^  Unify: (273) [user] mfix_vars1(1295, _331174)
   Call: (274) [system] 1295==true
^  Redo: (273) [user] mfix_vars1(1295, _331174)
^  Unify: (273) [user] mfix_vars1(1295, _331174)
   Call: (274) [system] 1295==false
^  Redo: (273) [user] mfix_vars1(1295, _331174)
^  Unify: (273) [user] mfix_vars1(1295, _331174)
   Call: (274) [system] 1295==[_345100, _345106]
^  Redo: (273) [user] mfix_vars1(1295, _331174)
^  Unify: (273) [user] mfix_vars1(1295, _331174)
   Call: (274) [system] is_list(1295)
^  Redo: (273) [user] mfix_vars1(1295, _331174)
^  Unify: (273) [user] mfix_vars1(1295, _331174)
   Call: (274) [system] string(1295)
^  Redo: (273) [user] mfix_vars1(1295, _331174)
^  Unify: (273) [user] mfix_vars1(1295, _331174)
   Call: (274) [system] compound(1295)
^  Redo: (273) [user] mfix_vars1(1295, _331174)
^  Unify: (273) [user] mfix_vars1(1295, _331174)
^  Call: (274) [user] symbol(1295)
^  Unify: (274) [user] symbol(1295)
   Call: (275) [system] atom(1295)
   Fail: (275) [system] atom(1295)
^  Fail: (274) [user] symbol(1295)
^  Redo: (273) [user] mfix_vars1(1295, _331174)
   Call: (274) [system] 1295=_331174
   Exit: (274) [system] 1295=1295
^  Exit: (273) [user] mfix_vars1(1295, 1295)
   Call: (273) [apply] apply:maplist_([0], _331176, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_365500|_365502], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _365500)
^  Unify: (274) [user] mfix_vars1(0, _365500)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _365500)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_370146))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _365500)
^  Unify: (274) [user] mfix_vars1(0, _365500)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _365500)
^  Unify: (274) [user] mfix_vars1(0, _365500)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _365500)
^  Unify: (274) [user] mfix_vars1(0, _365500)
   Call: (275) [system] 0==[_379426, _379432]
^  Redo: (274) [user] mfix_vars1(0, _365500)
^  Unify: (274) [user] mfix_vars1(0, _365500)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _365500)
^  Unify: (274) [user] mfix_vars1(0, _365500)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _365500)
^  Unify: (274) [user] mfix_vars1(0, _365500)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _365500)
^  Unify: (274) [user] mfix_vars1(0, _365500)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _365500)
   Call: (275) [system] 0=_365500
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _365502, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1295, 0], [1295, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0], [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0], [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0])
   Call: (270) [system] compound_name_arguments(_259674, '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0)\=@='$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _254088)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _415674))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _415674))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _415674))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _415674))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _415674)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _415674)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _421260))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _421260))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _421260)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _421260)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _421260)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0)\=@='$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _415674)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _248476))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _248476))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _248476))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _248476))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _248476)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _248476)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _443580))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _443580))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _443580)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _443580)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _443580)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0)\=@='$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _248476)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0)\=@='$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _472358, [], _472360)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _472358, [], _472360)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _472358, [], _472360)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _472358, [], _472360)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _472358, [], _472360)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), _481674, _481676)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0], _483560, [], _472360)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0], [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0], [], [])
   Call: (259) [system] var([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0], _483560, [], _472360)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0], [_487296|_487298], [], _472360)
^  Call: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _487296, [], _488236)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", [], [])
   Call: (260) [system] var(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _487296, [], _488236)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _487296, [], _488236)
   Call: (260) [system] atom(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _487296, [], _488236)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _487296, [], _488236)
   Call: (260) [system] compound(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", _487296, [], _488236)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", ";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", [], [])
^  Call: (259) [user] subst_vars([1295, 0], _487298, [], _472360)
^  Unify: (259) [user] subst_vars([1295, 0], [1295, 0], [], [])
   Call: (260) [system] var([1295, 0])
^  Redo: (259) [user] subst_vars([1295, 0], _487298, [], _472360)
^  Unify: (259) [user] subst_vars([1295, 0], [_503168|_503170], [], _472360)
^  Call: (260) [user] subst_vars(1295, _503168, [], _504108)
^  Unify: (260) [user] subst_vars(1295, 1295, [], [])
   Call: (261) [system] var(1295)
^  Redo: (260) [user] subst_vars(1295, _503168, [], _504108)
^  Unify: (260) [user] subst_vars(1295, _503168, [], _504108)
   Call: (261) [system] atom(1295)
^  Redo: (260) [user] subst_vars(1295, _503168, [], _504108)
^  Unify: (260) [user] subst_vars(1295, _503168, [], _504108)
   Call: (261) [system] compound(1295)
^  Redo: (260) [user] subst_vars(1295, _503168, [], _504108)
^  Unify: (260) [user] subst_vars(1295, 1295, [], [])
^  Exit: (260) [user] subst_vars(1295, 1295, [], [])
^  Call: (260) [user] subst_vars([0], _503170, [], _472360)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _503170, [], _472360)
^  Unify: (260) [user] subst_vars([0], [_519040|_519042], [], _472360)
^  Call: (261) [user] subst_vars(0, _519040, [], _519980)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _519040, [], _519980)
^  Unify: (261) [user] subst_vars(0, _6002, [], _6006)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _6002, [], _6006)
^  Unify: (261) [user] subst_vars(0, _6002, [], _6006)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _6002, [], _6006)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _6004, [], _5958)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _6004, [], _5958)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1295, 0], [1295, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0], [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5956, '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT', [";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), [], [])
   Call: (257) [system] _24470=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetOp{}.execute(&mut vec![expr!(x), expr!(x \"A\"), expr!(x)]),", 1295, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1296, 0, 46429, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$stream_position'(46429, 1296, 0, 46429)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _77194))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _77194))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _77194)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _77194)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _77194)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _77194)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _82806))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _82806))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _82806))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _82806))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _82806)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _82806)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _88392))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _88392))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _88392)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _88392)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _88392)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _88392)
   Call: (270) [system] var('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _88392)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$VAR'(_95852))
   Call: (270) [system] atom('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _88392)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _88392)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _88392)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _88392)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _88392)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _88392)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0)==[_105132, _105138]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _88392)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _88392)
   Call: (270) [system] is_list('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _88392)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _88392)
   Call: (270) [system] string('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _88392)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _88392)
   Call: (270) [system] compound('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _115334, _115336)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT', [";;            Ok(vec![expr!(x \"A\")]));", 1296, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            Ok(vec![expr!(x \"A\")]));", 1296, 0], _119076)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            Ok(vec![expr!(x \"A\")]));", 1296, 0], _119076)
   Call: (271) [apply] apply:maplist_([";;            Ok(vec![expr!(x \"A\")]));", 1296, 0], _119076, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            Ok(vec![expr!(x \"A\")]));", 1296, 0], [_121894|_121896], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            Ok(vec![expr!(x \"A\")]));", _121894)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(x \"A\")]));", _121894)
   Call: (273) [system] var(";;            Ok(vec![expr!(x \"A\")]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(x \"A\")]));", _121894)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(x \"A\")]));", '$VAR'(_126540))
   Call: (273) [system] atom(";;            Ok(vec![expr!(x \"A\")]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(x \"A\")]));", _121894)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(x \"A\")]));", _121894)
   Call: (273) [system] ";;            Ok(vec![expr!(x \"A\")]));"==true
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(x \"A\")]));", _121894)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(x \"A\")]));", _121894)
   Call: (273) [system] ";;            Ok(vec![expr!(x \"A\")]));"==false
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(x \"A\")]));", _121894)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(x \"A\")]));", _121894)
   Call: (273) [system] ";;            Ok(vec![expr!(x \"A\")]));"==[_135820, _135826]
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(x \"A\")]));", _121894)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(x \"A\")]));", _121894)
   Call: (273) [system] is_list(";;            Ok(vec![expr!(x \"A\")]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(x \"A\")]));", _121894)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(x \"A\")]));", _121894)
   Call: (273) [system] string(";;            Ok(vec![expr!(x \"A\")]));")
   Exit: (273) [system] string(";;            Ok(vec![expr!(x \"A\")]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(x \"A\")]));", _121894)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(x \"A\")]));", _121894)
   Call: (273) [system] compound(";;            Ok(vec![expr!(x \"A\")]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(x \"A\")]));", _121894)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!(x \"A\")]));", _121894)
^  Call: (273) [user] symbol(";;            Ok(vec![expr!(x \"A\")]));")
^  Unify: (273) [user] symbol(";;            Ok(vec![expr!(x \"A\")]));")
   Call: (274) [system] atom(";;            Ok(vec![expr!(x \"A\")]));")
   Fail: (274) [system] atom(";;            Ok(vec![expr!(x \"A\")]));")
^  Fail: (273) [user] symbol(";;            Ok(vec![expr!(x \"A\")]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!(x \"A\")]));", _121894)
   Call: (273) [system] ";;            Ok(vec![expr!(x \"A\")]));"=_121894
   Exit: (273) [system] ";;            Ok(vec![expr!(x \"A\")]));"=";;            Ok(vec![expr!(x \"A\")]));"
^  Exit: (272) [user] mfix_vars1(";;            Ok(vec![expr!(x \"A\")]));", ";;            Ok(vec![expr!(x \"A\")]));")
   Call: (272) [apply] apply:maplist_([1296, 0], _121896, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1296, 0], [_159892|_159894], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1296, _159892)
^  Unify: (273) [user] mfix_vars1(1296, _159892)
   Call: (274) [system] var(1296)
^  Redo: (273) [user] mfix_vars1(1296, _159892)
^  Unify: (273) [user] mfix_vars1(1296, '$VAR'(_164538))
   Call: (274) [system] atom(1296)
^  Redo: (273) [user] mfix_vars1(1296, _159892)
^  Unify: (273) [user] mfix_vars1(1296, _159892)
   Call: (274) [system] 1296==true
^  Redo: (273) [user] mfix_vars1(1296, _159892)
^  Unify: (273) [user] mfix_vars1(1296, _159892)
   Call: (274) [system] 1296==false
^  Redo: (273) [user] mfix_vars1(1296, _159892)
^  Unify: (273) [user] mfix_vars1(1296, _159892)
   Call: (274) [system] 1296==[_173818, _173824]
^  Redo: (273) [user] mfix_vars1(1296, _159892)
^  Unify: (273) [user] mfix_vars1(1296, _159892)
   Call: (274) [system] is_list(1296)
^  Redo: (273) [user] mfix_vars1(1296, _159892)
^  Unify: (273) [user] mfix_vars1(1296, _159892)
   Call: (274) [system] string(1296)
^  Redo: (273) [user] mfix_vars1(1296, _159892)
^  Unify: (273) [user] mfix_vars1(1296, _159892)
   Call: (274) [system] compound(1296)
^  Redo: (273) [user] mfix_vars1(1296, _159892)
^  Unify: (273) [user] mfix_vars1(1296, _159892)
^  Call: (274) [user] symbol(1296)
^  Unify: (274) [user] symbol(1296)
   Call: (275) [system] atom(1296)
   Fail: (275) [system] atom(1296)
^  Fail: (274) [user] symbol(1296)
^  Redo: (273) [user] mfix_vars1(1296, _159892)
   Call: (274) [system] 1296=_159892
   Exit: (274) [system] 1296=1296
^  Exit: (273) [user] mfix_vars1(1296, 1296)
   Call: (273) [apply] apply:maplist_([0], _159894, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_194218|_194220], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _194218)
^  Unify: (274) [user] mfix_vars1(0, _194218)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _194218)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_198864))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _194218)
^  Unify: (274) [user] mfix_vars1(0, _194218)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _194218)
^  Unify: (274) [user] mfix_vars1(0, _194218)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _194218)
^  Unify: (274) [user] mfix_vars1(0, _194218)
   Call: (275) [system] 0==[_208144, _208150]
^  Redo: (274) [user] mfix_vars1(0, _194218)
^  Unify: (274) [user] mfix_vars1(0, _194218)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _194218)
^  Unify: (274) [user] mfix_vars1(0, _194218)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _194218)
^  Unify: (274) [user] mfix_vars1(0, _194218)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _194218)
^  Unify: (274) [user] mfix_vars1(0, _194218)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _194218)
   Call: (275) [system] 0=_194218
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _194220, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1296, 0], [1296, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            Ok(vec![expr!(x \"A\")]));", 1296, 0], [";;            Ok(vec![expr!(x \"A\")]));", 1296, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            Ok(vec![expr!(x \"A\")]));", 1296, 0], [";;            Ok(vec![expr!(x \"A\")]));", 1296, 0])
   Call: (270) [system] compound_name_arguments(_88392, '$COMMENT', [";;            Ok(vec![expr!(x \"A\")]));", 1296, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT', [";;            Ok(vec![expr!(x \"A\")]));", 1296, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0)\=@='$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _82806)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _244392))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _244392))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _244392))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _244392))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _244392)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _244392)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _249978))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _249978))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _249978)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _249978)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _249978)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0)\=@='$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _244392)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _77194))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _77194))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _77194))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _77194))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _77194)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _77194)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _272298))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _272298))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _272298)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _272298)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _272298)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0)\=@='$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _77194)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0)))
   Call: (261) [system] '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0)\=@='$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _301076, [], _301078)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _301076, [], _301078)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _301076, [], _301078)
   Call: (258) [system] atom('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _301076, [], _301078)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _301076, [], _301078)
   Call: (258) [system] compound('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), _310392, _310394)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT', [";;            Ok(vec![expr!(x \"A\")]));", 1296, 0])
^  Call: (258) [user] subst_vars([";;            Ok(vec![expr!(x \"A\")]));", 1296, 0], _312278, [], _301078)
^  Unify: (258) [user] subst_vars([";;            Ok(vec![expr!(x \"A\")]));", 1296, 0], [";;            Ok(vec![expr!(x \"A\")]));", 1296, 0], [], [])
   Call: (259) [system] var([";;            Ok(vec![expr!(x \"A\")]));", 1296, 0])
^  Redo: (258) [user] subst_vars([";;            Ok(vec![expr!(x \"A\")]));", 1296, 0], _312278, [], _301078)
^  Unify: (258) [user] subst_vars([";;            Ok(vec![expr!(x \"A\")]));", 1296, 0], [_316014|_316016], [], _301078)
^  Call: (259) [user] subst_vars(";;            Ok(vec![expr!(x \"A\")]));", _316014, [], _316954)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!(x \"A\")]));", ";;            Ok(vec![expr!(x \"A\")]));", [], [])
   Call: (260) [system] var(";;            Ok(vec![expr!(x \"A\")]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![expr!(x \"A\")]));", _316014, [], _316954)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!(x \"A\")]));", _316014, [], _316954)
   Call: (260) [system] atom(";;            Ok(vec![expr!(x \"A\")]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![expr!(x \"A\")]));", _316014, [], _316954)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!(x \"A\")]));", _316014, [], _316954)
   Call: (260) [system] compound(";;            Ok(vec![expr!(x \"A\")]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![expr!(x \"A\")]));", _316014, [], _316954)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!(x \"A\")]));", ";;            Ok(vec![expr!(x \"A\")]));", [], [])
^  Exit: (259) [user] subst_vars(";;            Ok(vec![expr!(x \"A\")]));", ";;            Ok(vec![expr!(x \"A\")]));", [], [])
^  Call: (259) [user] subst_vars([1296, 0], _316016, [], _301078)
^  Unify: (259) [user] subst_vars([1296, 0], [1296, 0], [], [])
   Call: (260) [system] var([1296, 0])
^  Redo: (259) [user] subst_vars([1296, 0], _316016, [], _301078)
^  Unify: (259) [user] subst_vars([1296, 0], [_331886|_331888], [], _301078)
^  Call: (260) [user] subst_vars(1296, _331886, [], _332826)
^  Unify: (260) [user] subst_vars(1296, 1296, [], [])
   Call: (261) [system] var(1296)
^  Redo: (260) [user] subst_vars(1296, _331886, [], _332826)
^  Unify: (260) [user] subst_vars(1296, _331886, [], _332826)
   Call: (261) [system] atom(1296)
^  Redo: (260) [user] subst_vars(1296, _331886, [], _332826)
^  Unify: (260) [user] subst_vars(1296, _331886, [], _332826)
   Call: (261) [system] compound(1296)
^  Redo: (260) [user] subst_vars(1296, _331886, [], _332826)
^  Unify: (260) [user] subst_vars(1296, 1296, [], [])
^  Exit: (260) [user] subst_vars(1296, 1296, [], [])
^  Call: (260) [user] subst_vars([0], _331888, [], _301078)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _331888, [], _301078)
^  Unify: (260) [user] subst_vars([0], [_347758|_347760], [], _301078)
^  Call: (261) [user] subst_vars(0, _347758, [], _348698)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _347758, [], _348698)
^  Unify: (261) [user] subst_vars(0, _347758, [], _348698)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _347758, [], _348698)
^  Unify: (261) [user] subst_vars(0, _347758, [], _348698)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _347758, [], _348698)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _347760, [], _301078)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _347760, [], _301078)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1296, 0], [1296, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            Ok(vec![expr!(x \"A\")]));", 1296, 0], [";;            Ok(vec![expr!(x \"A\")]));", 1296, 0], [], [])
   Call: (258) [system] compound_name_arguments(_301076, '$COMMENT', [";;            Ok(vec![expr!(x \"A\")]));", 1296, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT', [";;            Ok(vec![expr!(x \"A\")]));", 1296, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), [], [])
   Call: (257) [system] _371116=metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!(x \"A\")]));", 1296, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1297, 0, 46468, '$COMMENT'(";;    }", 1297, 0), '$stream_position'(46468, 1297, 0, 46468)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1297, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1297, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    }", 1297, 0), _423834))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1297, 0), _423834))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    }", 1297, 0), _423834)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1297, 0), _423834)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1297, 0), _423834)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1297, 0), _423834)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    }", 1297, 0), _429446))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1297, 0), _429446))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1297, 0), _429446))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1297, 0), _429446))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1297, 0), _429446)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1297, 0), _429446)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    }", 1297, 0), _435032))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1297, 0), _435032))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    }", 1297, 0), _435032)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1297, 0), _435032)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1297, 0), _435032)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1297, 0), _435032)
   Call: (270) [system] var('$COMMENT'(";;    }", 1297, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1297, 0), _435032)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1297, 0), '$VAR'(_442492))
   Call: (270) [system] atom('$COMMENT'(";;    }", 1297, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1297, 0), _435032)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1297, 0), _435032)
   Call: (270) [system] '$COMMENT'(";;    }", 1297, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1297, 0), _435032)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1297, 0), _435032)
   Call: (270) [system] '$COMMENT'(";;    }", 1297, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1297, 0), _435032)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1297, 0), _435032)
   Call: (270) [system] '$COMMENT'(";;    }", 1297, 0)==[_451772, _451778]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1297, 0), _435032)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1297, 0), _435032)
   Call: (270) [system] is_list('$COMMENT'(";;    }", 1297, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1297, 0), _435032)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1297, 0), _435032)
   Call: (270) [system] string('$COMMENT'(";;    }", 1297, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1297, 0), _435032)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1297, 0), _435032)
   Call: (270) [system] compound('$COMMENT'(";;    }", 1297, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    }", 1297, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1297, 0), _461974, _461976)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1297, 0), '$COMMENT', [";;    }", 1297, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    }", 1297, 0], _465716)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1297, 0], _465716)
   Call: (271) [apply] apply:maplist_([";;    }", 1297, 0], _465716, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    }", 1297, 0], [_468534|_468536], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    }", _468534)
^  Unify: (272) [user] mfix_vars1(";;    }", _468534)
   Call: (273) [system] var(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _468534)
^  Unify: (272) [user] mfix_vars1(";;    }", '$VAR'(_473180))
   Call: (273) [system] atom(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _468534)
^  Unify: (272) [user] mfix_vars1(";;    }", _468534)
   Call: (273) [system] ";;    }"==true
^  Redo: (272) [user] mfix_vars1(";;    }", _468534)
^  Unify: (272) [user] mfix_vars1(";;    }", _468534)
   Call: (273) [system] ";;    }"==false
^  Redo: (272) [user] mfix_vars1(";;    }", _468534)
^  Unify: (272) [user] mfix_vars1(";;    }", _468534)
   Call: (273) [system] ";;    }"==[_482460, _482466]
^  Redo: (272) [user] mfix_vars1(";;    }", _468534)
^  Unify: (272) [user] mfix_vars1(";;    }", _468534)
   Call: (273) [system] is_list(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _468534)
^  Unify: (272) [user] mfix_vars1(";;    }", _468534)
   Call: (273) [system] string(";;    }")
   Exit: (273) [system] string(";;    }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    }", _468534)
^  Unify: (272) [user] mfix_vars1(";;    }", _468534)
   Call: (273) [system] compound(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _468534)
^  Unify: (272) [user] mfix_vars1(";;    }", _468534)
^  Call: (273) [user] symbol(";;    }")
^  Unify: (273) [user] symbol(";;    }")
   Call: (274) [system] atom(";;    }")
   Fail: (274) [system] atom(";;    }")
^  Fail: (273) [user] symbol(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _468534)
   Call: (273) [system] ";;    }"=_468534
   Exit: (273) [system] ";;    }"=";;    }"
^  Exit: (272) [user] mfix_vars1(";;    }", ";;    }")
   Call: (272) [apply] apply:maplist_([1297, 0], _468536, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1297, 0], [_506532|_506534], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1297, _506532)
^  Unify: (273) [user] mfix_vars1(1297, _506532)
   Call: (274) [system] var(1297)
^  Redo: (273) [user] mfix_vars1(1297, _506532)
^  Unify: (273) [user] mfix_vars1(1297, '$VAR'(_511178))
   Call: (274) [system] atom(1297)
^  Redo: (273) [user] mfix_vars1(1297, _506532)
^  Unify: (273) [user] mfix_vars1(1297, _506532)
   Call: (274) [system] 1297==true
^  Redo: (273) [user] mfix_vars1(1297, _506532)
^  Unify: (273) [user] mfix_vars1(1297, _506532)
   Call: (274) [system] 1297==false
^  Redo: (273) [user] mfix_vars1(1297, _506532)
^  Unify: (273) [user] mfix_vars1(1297, _506532)
   Call: (274) [system] 1297==[_520458, _520464]
^  Redo: (273) [user] mfix_vars1(1297, _506532)
^  Unify: (273) [user] mfix_vars1(1297, _506532)
   Call: (274) [system] is_list(1297)
^  Redo: (273) [user] mfix_vars1(1297, _6030)
^  Unify: (273) [user] mfix_vars1(1297, _6030)
   Call: (274) [system] string(1297)
^  Redo: (273) [user] mfix_vars1(1297, _6030)
^  Unify: (273) [user] mfix_vars1(1297, _6030)
   Call: (274) [system] compound(1297)
^  Redo: (273) [user] mfix_vars1(1297, _6030)
^  Unify: (273) [user] mfix_vars1(1297, _6030)
^  Call: (274) [user] symbol(1297)
^  Unify: (274) [user] symbol(1297)
   Call: (275) [system] atom(1297)
   Fail: (275) [system] atom(1297)
^  Fail: (274) [user] symbol(1297)
^  Redo: (273) [user] mfix_vars1(1297, _6030)
   Call: (274) [system] 1297=_6030
   Exit: (274) [system] 1297=1297
^  Exit: (273) [user] mfix_vars1(1297, 1297)
   Call: (273) [apply] apply:maplist_([0], _6032, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_22712|_22714], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _22712)
^  Unify: (274) [user] mfix_vars1(0, _22712)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _22712)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_27358))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _22712)
^  Unify: (274) [user] mfix_vars1(0, _22712)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _22712)
^  Unify: (274) [user] mfix_vars1(0, _22712)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _22712)
^  Unify: (274) [user] mfix_vars1(0, _22712)
   Call: (275) [system] 0==[_36638, _36644]
^  Redo: (274) [user] mfix_vars1(0, _22712)
^  Unify: (274) [user] mfix_vars1(0, _22712)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _22712)
^  Unify: (274) [user] mfix_vars1(0, _22712)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _22712)
^  Unify: (274) [user] mfix_vars1(0, _22712)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _22712)
^  Unify: (274) [user] mfix_vars1(0, _22712)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _22712)
   Call: (275) [system] 0=_22712
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _22714, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1297, 0], [1297, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    }", 1297, 0], [";;    }", 1297, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1297, 0], [";;    }", 1297, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";;    }", 1297, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1297, 0), '$COMMENT', [";;    }", 1297, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1297, 0)\=@='$COMMENT'(";;    }", 1297, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1297, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    }", 1297, 0), _72886))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1297, 0), _72886))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1297, 0), _72886))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1297, 0), _72886))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1297, 0), _72886)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1297, 0), _72886)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    }", 1297, 0), _78472))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1297, 0), _78472))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    }", 1297, 0), _78472)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1297, 0), _78472)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    }", 1297, 0), _78472)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1297, 0)\=@='$COMMENT'(";;    }", 1297, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1297, 0), _72886)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    }", 1297, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1297, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1297, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1297, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1297, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1297, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    }", 1297, 0), _100792))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1297, 0), _100792))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    }", 1297, 0), _100792)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1297, 0), _100792)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    }", 1297, 0), _100792)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1297, 0)\=@='$COMMENT'(";;    }", 1297, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1297, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0)))
   Call: (261) [system] '$COMMENT'(";;    }", 1297, 0)\=@='$COMMENT'(";;    }", 1297, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1297, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1297, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1297, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1297, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1297, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    }", 1297, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    }", 1297, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    }", 1297, 0), _129570, [], _129572)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    }", 1297, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1297, 0), _129570, [], _129572)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1297, 0), _129570, [], _129572)
   Call: (258) [system] atom('$COMMENT'(";;    }", 1297, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1297, 0), _129570, [], _129572)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1297, 0), _129570, [], _129572)
   Call: (258) [system] compound('$COMMENT'(";;    }", 1297, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    }", 1297, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1297, 0), _138886, _138888)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1297, 0), '$COMMENT', [";;    }", 1297, 0])
^  Call: (258) [user] subst_vars([";;    }", 1297, 0], _140772, [], _129572)
^  Unify: (258) [user] subst_vars([";;    }", 1297, 0], [";;    }", 1297, 0], [], [])
   Call: (259) [system] var([";;    }", 1297, 0])
^  Redo: (258) [user] subst_vars([";;    }", 1297, 0], _140772, [], _129572)
^  Unify: (258) [user] subst_vars([";;    }", 1297, 0], [_144508|_144510], [], _129572)
^  Call: (259) [user] subst_vars(";;    }", _144508, [], _145448)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
   Call: (260) [system] var(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _144508, [], _145448)
^  Unify: (259) [user] subst_vars(";;    }", _144508, [], _145448)
   Call: (260) [system] atom(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _144508, [], _145448)
^  Unify: (259) [user] subst_vars(";;    }", _144508, [], _145448)
   Call: (260) [system] compound(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _144508, [], _145448)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Exit: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Call: (259) [user] subst_vars([1297, 0], _144510, [], _129572)
^  Unify: (259) [user] subst_vars([1297, 0], [1297, 0], [], [])
   Call: (260) [system] var([1297, 0])
^  Redo: (259) [user] subst_vars([1297, 0], _144510, [], _129572)
^  Unify: (259) [user] subst_vars([1297, 0], [_160380|_160382], [], _129572)
^  Call: (260) [user] subst_vars(1297, _160380, [], _161320)
^  Unify: (260) [user] subst_vars(1297, 1297, [], [])
   Call: (261) [system] var(1297)
^  Redo: (260) [user] subst_vars(1297, _160380, [], _161320)
^  Unify: (260) [user] subst_vars(1297, _160380, [], _161320)
   Call: (261) [system] atom(1297)
^  Redo: (260) [user] subst_vars(1297, _160380, [], _161320)
^  Unify: (260) [user] subst_vars(1297, _160380, [], _161320)
   Call: (261) [system] compound(1297)
^  Redo: (260) [user] subst_vars(1297, _160380, [], _161320)
^  Unify: (260) [user] subst_vars(1297, 1297, [], [])
^  Exit: (260) [user] subst_vars(1297, 1297, [], [])
^  Call: (260) [user] subst_vars([0], _160382, [], _129572)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _160382, [], _129572)
^  Unify: (260) [user] subst_vars([0], [_176252|_176254], [], _129572)
^  Call: (261) [user] subst_vars(0, _176252, [], _177192)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _176252, [], _177192)
^  Unify: (261) [user] subst_vars(0, _176252, [], _177192)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _176252, [], _177192)
^  Unify: (261) [user] subst_vars(0, _176252, [], _177192)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _176252, [], _177192)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _176254, [], _129572)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _176254, [], _129572)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1297, 0], [1297, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    }", 1297, 0], [";;    }", 1297, 0], [], [])
   Call: (258) [system] compound_name_arguments(_129570, '$COMMENT', [";;    }", 1297, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1297, 0), '$COMMENT', [";;    }", 1297, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    }", 1297, 0), '$COMMENT'(";;    }", 1297, 0), [], [])
   Call: (257) [system] _199610=metta_file_buffer(+, '$COMMENT'(";;    }", 1297, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    }", 1297, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    }", 1297, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1297, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1297, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1297, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1297, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1297, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1297, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1298, 0, 46476, '$COMMENT'(";; Converted:", 1298, 0), '$stream_position'(46476, 1298, 0, 46476)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1298, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1298, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1298, 0), _252328))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1298, 0), _252328))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1298, 0), _252328)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1298, 0), _252328)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1298, 0), _252328)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1298, 0), _252328)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1298, 0), _257940))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1298, 0), _257940))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1298, 0), _257940))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1298, 0), _257940))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1298, 0), _257940)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1298, 0), _257940)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1298, 0), _263526))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1298, 0), _263526))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1298, 0), _263526)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1298, 0), _263526)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1298, 0), _263526)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1298, 0), _263526)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1298, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1298, 0), _263526)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1298, 0), '$VAR'(_270986))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1298, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1298, 0), _263526)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1298, 0), _263526)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1298, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1298, 0), _263526)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1298, 0), _263526)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1298, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1298, 0), _263526)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1298, 0), _263526)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1298, 0)==[_280266, _280272]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1298, 0), _263526)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1298, 0), _263526)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1298, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1298, 0), _263526)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1298, 0), _263526)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1298, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1298, 0), _263526)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1298, 0), _263526)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1298, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1298, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1298, 0), _290468, _290470)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1298, 0), '$COMMENT', [";; Converted:", 1298, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1298, 0], _294210)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1298, 0], _294210)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1298, 0], _294210, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1298, 0], [_297028|_297030], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _297028)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _297028)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _297028)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_301674))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _297028)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _297028)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _297028)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _297028)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _297028)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _297028)
   Call: (273) [system] ";; Converted:"==[_310954, _310960]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _297028)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _297028)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _297028)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _297028)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _297028)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _297028)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _297028)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _297028)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _297028)
   Call: (273) [system] ";; Converted:"=_297028
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1298, 0], _297030, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1298, 0], [_335026|_335028], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1298, _335026)
^  Unify: (273) [user] mfix_vars1(1298, _335026)
   Call: (274) [system] var(1298)
^  Redo: (273) [user] mfix_vars1(1298, _335026)
^  Unify: (273) [user] mfix_vars1(1298, '$VAR'(_339672))
   Call: (274) [system] atom(1298)
^  Redo: (273) [user] mfix_vars1(1298, _335026)
^  Unify: (273) [user] mfix_vars1(1298, _335026)
   Call: (274) [system] 1298==true
^  Redo: (273) [user] mfix_vars1(1298, _335026)
^  Unify: (273) [user] mfix_vars1(1298, _335026)
   Call: (274) [system] 1298==false
^  Redo: (273) [user] mfix_vars1(1298, _335026)
^  Unify: (273) [user] mfix_vars1(1298, _335026)
   Call: (274) [system] 1298==[_348952, _348958]
^  Redo: (273) [user] mfix_vars1(1298, _335026)
^  Unify: (273) [user] mfix_vars1(1298, _335026)
   Call: (274) [system] is_list(1298)
^  Redo: (273) [user] mfix_vars1(1298, _335026)
^  Unify: (273) [user] mfix_vars1(1298, _335026)
   Call: (274) [system] string(1298)
^  Redo: (273) [user] mfix_vars1(1298, _335026)
^  Unify: (273) [user] mfix_vars1(1298, _335026)
   Call: (274) [system] compound(1298)
^  Redo: (273) [user] mfix_vars1(1298, _335026)
^  Unify: (273) [user] mfix_vars1(1298, _335026)
^  Call: (274) [user] symbol(1298)
^  Unify: (274) [user] symbol(1298)
   Call: (275) [system] atom(1298)
   Fail: (275) [system] atom(1298)
^  Fail: (274) [user] symbol(1298)
^  Redo: (273) [user] mfix_vars1(1298, _335026)
   Call: (274) [system] 1298=_335026
   Exit: (274) [system] 1298=1298
^  Exit: (273) [user] mfix_vars1(1298, 1298)
   Call: (273) [apply] apply:maplist_([0], _335028, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_369352|_369354], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _369352)
^  Unify: (274) [user] mfix_vars1(0, _369352)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _369352)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_373998))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _369352)
^  Unify: (274) [user] mfix_vars1(0, _369352)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _369352)
^  Unify: (274) [user] mfix_vars1(0, _369352)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _369352)
^  Unify: (274) [user] mfix_vars1(0, _369352)
   Call: (275) [system] 0==[_383278, _383284]
^  Redo: (274) [user] mfix_vars1(0, _369352)
^  Unify: (274) [user] mfix_vars1(0, _369352)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _369352)
^  Unify: (274) [user] mfix_vars1(0, _369352)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _369352)
^  Unify: (274) [user] mfix_vars1(0, _369352)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _369352)
^  Unify: (274) [user] mfix_vars1(0, _369352)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _369352)
   Call: (275) [system] 0=_369352
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _369354, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1298, 0], [1298, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1298, 0], [";; Converted:", 1298, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1298, 0], [";; Converted:", 1298, 0])
   Call: (270) [system] compound_name_arguments(_263526, '$COMMENT', [";; Converted:", 1298, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1298, 0), '$COMMENT', [";; Converted:", 1298, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1298, 0)\=@='$COMMENT'(";; Converted:", 1298, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1298, 0), _257940)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1298, 0), _419526))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1298, 0), _419526))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1298, 0), _419526))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1298, 0), _419526))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1298, 0), _419526)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1298, 0), _419526)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1298, 0), _425112))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1298, 0), _425112))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1298, 0), _425112)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1298, 0), _425112)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1298, 0), _425112)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1298, 0)\=@='$COMMENT'(";; Converted:", 1298, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1298, 0), _419526)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1298, 0), _252328))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1298, 0), _252328))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1298, 0), _252328))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1298, 0), _252328))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1298, 0), _252328)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1298, 0), _252328)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1298, 0), _447432))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1298, 0), _447432))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1298, 0), _447432)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1298, 0), _447432)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1298, 0), _447432)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1298, 0)\=@='$COMMENT'(";; Converted:", 1298, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1298, 0), _252328)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1298, 0)\=@='$COMMENT'(";; Converted:", 1298, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1298, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1298, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1298, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1298, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1298, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1298, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1298, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1298, 0), _476210, [], _476212)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1298, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1298, 0), _476210, [], _476212)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1298, 0), _476210, [], _476212)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1298, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1298, 0), _476210, [], _476212)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1298, 0), _476210, [], _476212)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1298, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1298, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1298, 0), _485526, _485528)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1298, 0), '$COMMENT', [";; Converted:", 1298, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1298, 0], _487412, [], _476212)
^  Unify: (258) [user] subst_vars([";; Converted:", 1298, 0], [";; Converted:", 1298, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1298, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1298, 0], _487412, [], _476212)
^  Unify: (258) [user] subst_vars([";; Converted:", 1298, 0], [_491148|_491150], [], _476212)
^  Call: (259) [user] subst_vars(";; Converted:", _491148, [], _492088)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _491148, [], _492088)
^  Unify: (259) [user] subst_vars(";; Converted:", _491148, [], _492088)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _491148, [], _492088)
^  Unify: (259) [user] subst_vars(";; Converted:", _491148, [], _492088)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _491148, [], _492088)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1298, 0], _491150, [], _476212)
^  Unify: (259) [user] subst_vars([1298, 0], [1298, 0], [], [])
   Call: (260) [system] var([1298, 0])
^  Redo: (259) [user] subst_vars([1298, 0], _491150, [], _476212)
^  Unify: (259) [user] subst_vars([1298, 0], [_507020|_507022], [], _476212)
^  Call: (260) [user] subst_vars(1298, _507020, [], _507960)
^  Unify: (260) [user] subst_vars(1298, 1298, [], [])
   Call: (261) [system] var(1298)
^  Redo: (260) [user] subst_vars(1298, _507020, [], _507960)
^  Unify: (260) [user] subst_vars(1298, _507020, [], _507960)
   Call: (261) [system] atom(1298)
^  Redo: (260) [user] subst_vars(1298, _507020, [], _507960)
^  Unify: (260) [user] subst_vars(1298, _507020, [], _507960)
   Call: (261) [system] compound(1298)
^  Redo: (260) [user] subst_vars(1298, _507020, [], _507960)
^  Unify: (260) [user] subst_vars(1298, 1298, [], [])
^  Exit: (260) [user] subst_vars(1298, 1298, [], [])
^  Call: (260) [user] subst_vars([0], _507022, [], _476212)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _507022, [], _476212)
^  Unify: (260) [user] subst_vars([0], [_522892|_522894], [], _476212)
^  Call: (261) [user] subst_vars(0, _5984, [], _5990)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _5984, [], _5990)
^  Unify: (261) [user] subst_vars(0, _5984, [], _5990)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _5984, [], _5990)
^  Unify: (261) [user] subst_vars(0, _5984, [], _5990)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _5984, [], _5990)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _5986, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _5986, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1298, 0], [1298, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1298, 0], [";; Converted:", 1298, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5938, '$COMMENT', [";; Converted:", 1298, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1298, 0), '$COMMENT', [";; Converted:", 1298, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1298, 0), '$COMMENT'(";; Converted:", 1298, 0), [], [])
   Call: (257) [system] _28242=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1298, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1298, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1298, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1298, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1298, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1298, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1298, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1298, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1298, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1301, 0, 46532, '$COMMENT'(";; Original:", 1301, 0), '$stream_position'(46532, 1301, 0, 46532)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1301, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1301, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1301, 0), _80960))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1301, 0), _80960))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1301, 0), _80960)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1301, 0), _80960)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1301, 0), _80960)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1301, 0), _80960)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1301, 0), _86572))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1301, 0), _86572))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1301, 0), _86572))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1301, 0), _86572))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1301, 0), _86572)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1301, 0), _86572)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1301, 0), _92158))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1301, 0), _92158))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1301, 0), _92158)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1301, 0), _92158)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1301, 0), _92158)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1301, 0), _92158)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1301, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1301, 0), _92158)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1301, 0), '$VAR'(_99618))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1301, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1301, 0), _92158)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1301, 0), _92158)
   Call: (270) [system] '$COMMENT'(";; Original:", 1301, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1301, 0), _92158)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1301, 0), _92158)
   Call: (270) [system] '$COMMENT'(";; Original:", 1301, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1301, 0), _92158)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1301, 0), _92158)
   Call: (270) [system] '$COMMENT'(";; Original:", 1301, 0)==[_108898, _108904]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1301, 0), _92158)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1301, 0), _92158)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1301, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1301, 0), _92158)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1301, 0), _92158)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1301, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1301, 0), _92158)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1301, 0), _92158)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1301, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1301, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1301, 0), _119100, _119102)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1301, 0), '$COMMENT', [";; Original:", 1301, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1301, 0], _122842)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1301, 0], _122842)
   Call: (271) [apply] apply:maplist_([";; Original:", 1301, 0], _122842, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1301, 0], [_125660|_125662], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _125660)
^  Unify: (272) [user] mfix_vars1(";; Original:", _125660)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _125660)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_130306))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _125660)
^  Unify: (272) [user] mfix_vars1(";; Original:", _125660)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _125660)
^  Unify: (272) [user] mfix_vars1(";; Original:", _125660)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _125660)
^  Unify: (272) [user] mfix_vars1(";; Original:", _125660)
   Call: (273) [system] ";; Original:"==[_139586, _139592]
^  Redo: (272) [user] mfix_vars1(";; Original:", _125660)
^  Unify: (272) [user] mfix_vars1(";; Original:", _125660)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _125660)
^  Unify: (272) [user] mfix_vars1(";; Original:", _125660)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _125660)
^  Unify: (272) [user] mfix_vars1(";; Original:", _125660)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _125660)
^  Unify: (272) [user] mfix_vars1(";; Original:", _125660)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _125660)
   Call: (273) [system] ";; Original:"=_125660
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1301, 0], _125662, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1301, 0], [_163658|_163660], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1301, _163658)
^  Unify: (273) [user] mfix_vars1(1301, _163658)
   Call: (274) [system] var(1301)
^  Redo: (273) [user] mfix_vars1(1301, _163658)
^  Unify: (273) [user] mfix_vars1(1301, '$VAR'(_168304))
   Call: (274) [system] atom(1301)
^  Redo: (273) [user] mfix_vars1(1301, _163658)
^  Unify: (273) [user] mfix_vars1(1301, _163658)
   Call: (274) [system] 1301==true
^  Redo: (273) [user] mfix_vars1(1301, _163658)
^  Unify: (273) [user] mfix_vars1(1301, _163658)
   Call: (274) [system] 1301==false
^  Redo: (273) [user] mfix_vars1(1301, _163658)
^  Unify: (273) [user] mfix_vars1(1301, _163658)
   Call: (274) [system] 1301==[_177584, _177590]
^  Redo: (273) [user] mfix_vars1(1301, _163658)
^  Unify: (273) [user] mfix_vars1(1301, _163658)
   Call: (274) [system] is_list(1301)
^  Redo: (273) [user] mfix_vars1(1301, _163658)
^  Unify: (273) [user] mfix_vars1(1301, _163658)
   Call: (274) [system] string(1301)
^  Redo: (273) [user] mfix_vars1(1301, _163658)
^  Unify: (273) [user] mfix_vars1(1301, _163658)
   Call: (274) [system] compound(1301)
^  Redo: (273) [user] mfix_vars1(1301, _163658)
^  Unify: (273) [user] mfix_vars1(1301, _163658)
^  Call: (274) [user] symbol(1301)
^  Unify: (274) [user] symbol(1301)
   Call: (275) [system] atom(1301)
   Fail: (275) [system] atom(1301)
^  Fail: (274) [user] symbol(1301)
^  Redo: (273) [user] mfix_vars1(1301, _163658)
   Call: (274) [system] 1301=_163658
   Exit: (274) [system] 1301=1301
^  Exit: (273) [user] mfix_vars1(1301, 1301)
   Call: (273) [apply] apply:maplist_([0], _163660, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_197984|_197986], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _197984)
^  Unify: (274) [user] mfix_vars1(0, _197984)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _197984)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_202630))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _197984)
^  Unify: (274) [user] mfix_vars1(0, _197984)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _197984)
^  Unify: (274) [user] mfix_vars1(0, _197984)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _197984)
^  Unify: (274) [user] mfix_vars1(0, _197984)
   Call: (275) [system] 0==[_211910, _211916]
^  Redo: (274) [user] mfix_vars1(0, _197984)
^  Unify: (274) [user] mfix_vars1(0, _197984)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _197984)
^  Unify: (274) [user] mfix_vars1(0, _197984)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _197984)
^  Unify: (274) [user] mfix_vars1(0, _197984)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _197984)
^  Unify: (274) [user] mfix_vars1(0, _197984)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _197984)
   Call: (275) [system] 0=_197984
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _197986, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1301, 0], [1301, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1301, 0], [";; Original:", 1301, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1301, 0], [";; Original:", 1301, 0])
   Call: (270) [system] compound_name_arguments(_92158, '$COMMENT', [";; Original:", 1301, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1301, 0), '$COMMENT', [";; Original:", 1301, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1301, 0)\=@='$COMMENT'(";; Original:", 1301, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1301, 0), _86572)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1301, 0), _248158))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1301, 0), _248158))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1301, 0), _248158))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1301, 0), _248158))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1301, 0), _248158)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1301, 0), _248158)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1301, 0), _253744))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1301, 0), _253744))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1301, 0), _253744)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1301, 0), _253744)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1301, 0), _253744)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1301, 0)\=@='$COMMENT'(";; Original:", 1301, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1301, 0), _248158)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1301, 0), _80960))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1301, 0), _80960))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1301, 0), _80960))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1301, 0), _80960))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1301, 0), _80960)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1301, 0), _80960)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1301, 0), _276064))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1301, 0), _276064))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1301, 0), _276064)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1301, 0), _276064)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1301, 0), _276064)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1301, 0)\=@='$COMMENT'(";; Original:", 1301, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1301, 0), _80960)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1301, 0)\=@='$COMMENT'(";; Original:", 1301, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1301, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1301, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1301, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1301, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1301, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1301, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1301, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1301, 0), _304842, [], _304844)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1301, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1301, 0), _304842, [], _304844)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1301, 0), _304842, [], _304844)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1301, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1301, 0), _304842, [], _304844)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1301, 0), _304842, [], _304844)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1301, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1301, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1301, 0), _314158, _314160)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1301, 0), '$COMMENT', [";; Original:", 1301, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1301, 0], _316044, [], _304844)
^  Unify: (258) [user] subst_vars([";; Original:", 1301, 0], [";; Original:", 1301, 0], [], [])
   Call: (259) [system] var([";; Original:", 1301, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1301, 0], _316044, [], _304844)
^  Unify: (258) [user] subst_vars([";; Original:", 1301, 0], [_319780|_319782], [], _304844)
^  Call: (259) [user] subst_vars(";; Original:", _319780, [], _320720)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _319780, [], _320720)
^  Unify: (259) [user] subst_vars(";; Original:", _319780, [], _320720)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _319780, [], _320720)
^  Unify: (259) [user] subst_vars(";; Original:", _319780, [], _320720)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _319780, [], _320720)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1301, 0], _319782, [], _304844)
^  Unify: (259) [user] subst_vars([1301, 0], [1301, 0], [], [])
   Call: (260) [system] var([1301, 0])
^  Redo: (259) [user] subst_vars([1301, 0], _319782, [], _304844)
^  Unify: (259) [user] subst_vars([1301, 0], [_335652|_335654], [], _304844)
^  Call: (260) [user] subst_vars(1301, _335652, [], _336592)
^  Unify: (260) [user] subst_vars(1301, 1301, [], [])
   Call: (261) [system] var(1301)
^  Redo: (260) [user] subst_vars(1301, _335652, [], _336592)
^  Unify: (260) [user] subst_vars(1301, _335652, [], _336592)
   Call: (261) [system] atom(1301)
^  Redo: (260) [user] subst_vars(1301, _335652, [], _336592)
^  Unify: (260) [user] subst_vars(1301, _335652, [], _336592)
   Call: (261) [system] compound(1301)
^  Redo: (260) [user] subst_vars(1301, _335652, [], _336592)
^  Unify: (260) [user] subst_vars(1301, 1301, [], [])
^  Exit: (260) [user] subst_vars(1301, 1301, [], [])
^  Call: (260) [user] subst_vars([0], _335654, [], _304844)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _335654, [], _304844)
^  Unify: (260) [user] subst_vars([0], [_351524|_351526], [], _304844)
^  Call: (261) [user] subst_vars(0, _351524, [], _352464)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _351524, [], _352464)
^  Unify: (261) [user] subst_vars(0, _351524, [], _352464)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _351524, [], _352464)
^  Unify: (261) [user] subst_vars(0, _351524, [], _352464)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _351524, [], _352464)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _351526, [], _304844)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _351526, [], _304844)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1301, 0], [1301, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1301, 0], [";; Original:", 1301, 0], [], [])
   Call: (258) [system] compound_name_arguments(_304842, '$COMMENT', [";; Original:", 1301, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1301, 0), '$COMMENT', [";; Original:", 1301, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1301, 0), '$COMMENT'(";; Original:", 1301, 0), [], [])
   Call: (257) [system] _374882=metta_file_buffer(+, '$COMMENT'(";; Original:", 1301, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1301, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1301, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1301, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1301, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1301, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1301, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1301, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1301, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1302, 0, 46545, '$COMMENT'(";;    #[test]", 1302, 0), '$stream_position'(46545, 1302, 0, 46545)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1302, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1302, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1302, 0), _427600))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1302, 0), _427600))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1302, 0), _427600)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1302, 0), _427600)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1302, 0), _427600)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1302, 0), _427600)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1302, 0), _433212))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1302, 0), _433212))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1302, 0), _433212))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1302, 0), _433212))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1302, 0), _433212)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1302, 0), _433212)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    #[test]", 1302, 0), _438798))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1302, 0), _438798))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    #[test]", 1302, 0), _438798)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1302, 0), _438798)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1302, 0), _438798)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1302, 0), _438798)
   Call: (270) [system] var('$COMMENT'(";;    #[test]", 1302, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1302, 0), _438798)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1302, 0), '$VAR'(_446258))
   Call: (270) [system] atom('$COMMENT'(";;    #[test]", 1302, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1302, 0), _438798)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1302, 0), _438798)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1302, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1302, 0), _438798)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1302, 0), _438798)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1302, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1302, 0), _438798)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1302, 0), _438798)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1302, 0)==[_455538, _455544]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1302, 0), _438798)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1302, 0), _438798)
   Call: (270) [system] is_list('$COMMENT'(";;    #[test]", 1302, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1302, 0), _438798)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1302, 0), _438798)
   Call: (270) [system] string('$COMMENT'(";;    #[test]", 1302, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1302, 0), _438798)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1302, 0), _438798)
   Call: (270) [system] compound('$COMMENT'(";;    #[test]", 1302, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    #[test]", 1302, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1302, 0), _465740, _465742)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT', [";;    #[test]", 1302, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    #[test]", 1302, 0], _469482)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1302, 0], _469482)
   Call: (271) [apply] apply:maplist_([";;    #[test]", 1302, 0], _469482, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    #[test]", 1302, 0], [_472300|_472302], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    #[test]", _472300)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _472300)
   Call: (273) [system] var(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _472300)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", '$VAR'(_476946))
   Call: (273) [system] atom(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _472300)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _472300)
   Call: (273) [system] ";;    #[test]"==true
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _472300)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _472300)
   Call: (273) [system] ";;    #[test]"==false
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _472300)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _472300)
   Call: (273) [system] ";;    #[test]"==[_486226, _486232]
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _472300)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _472300)
   Call: (273) [system] is_list(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _472300)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _472300)
   Call: (273) [system] string(";;    #[test]")
   Exit: (273) [system] string(";;    #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _472300)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _472300)
   Call: (273) [system] compound(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _472300)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _472300)
^  Call: (273) [user] symbol(";;    #[test]")
^  Unify: (273) [user] symbol(";;    #[test]")
   Call: (274) [system] atom(";;    #[test]")
   Fail: (274) [system] atom(";;    #[test]")
^  Fail: (273) [user] symbol(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _472300)
   Call: (273) [system] ";;    #[test]"=_472300
   Exit: (273) [system] ";;    #[test]"=";;    #[test]"
^  Exit: (272) [user] mfix_vars1(";;    #[test]", ";;    #[test]")
   Call: (272) [apply] apply:maplist_([1302, 0], _472302, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1302, 0], [_510298|_510300], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1302, _510298)
^  Unify: (273) [user] mfix_vars1(1302, _510298)
   Call: (274) [system] var(1302)
^  Redo: (273) [user] mfix_vars1(1302, _510298)
^  Unify: (273) [user] mfix_vars1(1302, '$VAR'(_514944))
   Call: (274) [system] atom(1302)
^  Redo: (273) [user] mfix_vars1(1302, _510298)
^  Unify: (273) [user] mfix_vars1(1302, _510298)
   Call: (274) [system] 1302==true
^  Redo: (273) [user] mfix_vars1(1302, _510298)
^  Unify: (273) [user] mfix_vars1(1302, _510298)
   Call: (274) [system] 1302==false
^  Redo: (273) [user] mfix_vars1(1302, _510298)
^  Unify: (273) [user] mfix_vars1(1302, _510298)
   Call: (274) [system] 1302==[_6038, _6044]
^  Redo: (273) [user] mfix_vars1(1302, _6030)
^  Unify: (273) [user] mfix_vars1(1302, _6030)
   Call: (274) [system] is_list(1302)
^  Redo: (273) [user] mfix_vars1(1302, _6030)
^  Unify: (273) [user] mfix_vars1(1302, _6030)
   Call: (274) [system] string(1302)
^  Redo: (273) [user] mfix_vars1(1302, _6030)
^  Unify: (273) [user] mfix_vars1(1302, _6030)
   Call: (274) [system] compound(1302)
^  Redo: (273) [user] mfix_vars1(1302, _6030)
^  Unify: (273) [user] mfix_vars1(1302, _6030)
^  Call: (274) [user] symbol(1302)
^  Unify: (274) [user] symbol(1302)
   Call: (275) [system] atom(1302)
   Fail: (275) [system] atom(1302)
^  Fail: (274) [user] symbol(1302)
^  Redo: (273) [user] mfix_vars1(1302, _6030)
   Call: (274) [system] 1302=_6030
   Exit: (274) [system] 1302=1302
^  Exit: (273) [user] mfix_vars1(1302, 1302)
   Call: (273) [apply] apply:maplist_([0], _6032, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_26438|_26440], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _26438)
^  Unify: (274) [user] mfix_vars1(0, _26438)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _26438)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_31084))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _26438)
^  Unify: (274) [user] mfix_vars1(0, _26438)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _26438)
^  Unify: (274) [user] mfix_vars1(0, _26438)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _26438)
^  Unify: (274) [user] mfix_vars1(0, _26438)
   Call: (275) [system] 0==[_40364, _40370]
^  Redo: (274) [user] mfix_vars1(0, _26438)
^  Unify: (274) [user] mfix_vars1(0, _26438)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _26438)
^  Unify: (274) [user] mfix_vars1(0, _26438)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _26438)
^  Unify: (274) [user] mfix_vars1(0, _26438)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _26438)
^  Unify: (274) [user] mfix_vars1(0, _26438)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _26438)
   Call: (275) [system] 0=_26438
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _26440, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1302, 0], [1302, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    #[test]", 1302, 0], [";;    #[test]", 1302, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1302, 0], [";;    #[test]", 1302, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";;    #[test]", 1302, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT', [";;    #[test]", 1302, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1302, 0)\=@='$COMMENT'(";;    #[test]", 1302, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1302, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    #[test]", 1302, 0), _76612))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1302, 0), _76612))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1302, 0), _76612))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1302, 0), _76612))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1302, 0), _76612)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1302, 0), _76612)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    #[test]", 1302, 0), _82198))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1302, 0), _82198))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    #[test]", 1302, 0), _82198)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1302, 0), _82198)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1302, 0), _82198)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1302, 0)\=@='$COMMENT'(";;    #[test]", 1302, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1302, 0), _76612)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    #[test]", 1302, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1302, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1302, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1302, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1302, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1302, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    #[test]", 1302, 0), _104518))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1302, 0), _104518))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    #[test]", 1302, 0), _104518)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1302, 0), _104518)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1302, 0), _104518)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1302, 0)\=@='$COMMENT'(";;    #[test]", 1302, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1302, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0)))
   Call: (261) [system] '$COMMENT'(";;    #[test]", 1302, 0)\=@='$COMMENT'(";;    #[test]", 1302, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1302, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1302, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1302, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1302, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1302, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1302, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1302, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1302, 0), _133296, [], _133298)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    #[test]", 1302, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1302, 0), _133296, [], _133298)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1302, 0), _133296, [], _133298)
   Call: (258) [system] atom('$COMMENT'(";;    #[test]", 1302, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1302, 0), _133296, [], _133298)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1302, 0), _133296, [], _133298)
   Call: (258) [system] compound('$COMMENT'(";;    #[test]", 1302, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    #[test]", 1302, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1302, 0), _142612, _142614)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT', [";;    #[test]", 1302, 0])
^  Call: (258) [user] subst_vars([";;    #[test]", 1302, 0], _144498, [], _133298)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1302, 0], [";;    #[test]", 1302, 0], [], [])
   Call: (259) [system] var([";;    #[test]", 1302, 0])
^  Redo: (258) [user] subst_vars([";;    #[test]", 1302, 0], _144498, [], _133298)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1302, 0], [_148234|_148236], [], _133298)
^  Call: (259) [user] subst_vars(";;    #[test]", _148234, [], _149174)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
   Call: (260) [system] var(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _148234, [], _149174)
^  Unify: (259) [user] subst_vars(";;    #[test]", _148234, [], _149174)
   Call: (260) [system] atom(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _148234, [], _149174)
^  Unify: (259) [user] subst_vars(";;    #[test]", _148234, [], _149174)
   Call: (260) [system] compound(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _148234, [], _149174)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Exit: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Call: (259) [user] subst_vars([1302, 0], _148236, [], _133298)
^  Unify: (259) [user] subst_vars([1302, 0], [1302, 0], [], [])
   Call: (260) [system] var([1302, 0])
^  Redo: (259) [user] subst_vars([1302, 0], _148236, [], _133298)
^  Unify: (259) [user] subst_vars([1302, 0], [_164106|_164108], [], _133298)
^  Call: (260) [user] subst_vars(1302, _164106, [], _165046)
^  Unify: (260) [user] subst_vars(1302, 1302, [], [])
   Call: (261) [system] var(1302)
^  Redo: (260) [user] subst_vars(1302, _164106, [], _165046)
^  Unify: (260) [user] subst_vars(1302, _164106, [], _165046)
   Call: (261) [system] atom(1302)
^  Redo: (260) [user] subst_vars(1302, _164106, [], _165046)
^  Unify: (260) [user] subst_vars(1302, _164106, [], _165046)
   Call: (261) [system] compound(1302)
^  Redo: (260) [user] subst_vars(1302, _164106, [], _165046)
^  Unify: (260) [user] subst_vars(1302, 1302, [], [])
^  Exit: (260) [user] subst_vars(1302, 1302, [], [])
^  Call: (260) [user] subst_vars([0], _164108, [], _133298)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _164108, [], _133298)
^  Unify: (260) [user] subst_vars([0], [_179978|_179980], [], _133298)
^  Call: (261) [user] subst_vars(0, _179978, [], _180918)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _179978, [], _180918)
^  Unify: (261) [user] subst_vars(0, _179978, [], _180918)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _179978, [], _180918)
^  Unify: (261) [user] subst_vars(0, _179978, [], _180918)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _179978, [], _180918)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _179980, [], _133298)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _179980, [], _133298)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1302, 0], [1302, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    #[test]", 1302, 0], [";;    #[test]", 1302, 0], [], [])
   Call: (258) [system] compound_name_arguments(_133296, '$COMMENT', [";;    #[test]", 1302, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT', [";;    #[test]", 1302, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1302, 0), '$COMMENT'(";;    #[test]", 1302, 0), [], [])
   Call: (257) [system] _203336=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1302, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1302, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1302, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1302, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1302, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1302, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1302, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1302, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1302, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1303, 0, 46559, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$stream_position'(46559, 1303, 0, 46559)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _256064))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _256064))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _256064)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _256064)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _256064)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _256064)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _261676))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _261676))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _261676))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _261676))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _261676)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _261676)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _267262))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _267262))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _267262)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _267262)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _267262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _267262)
   Call: (270) [system] var('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _267262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$VAR'(_274722))
   Call: (270) [system] atom('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _267262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _267262)
   Call: (270) [system] '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _267262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _267262)
   Call: (270) [system] '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _267262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _267262)
   Call: (270) [system] '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0)==[_284002, _284008]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _267262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _267262)
   Call: (270) [system] is_list('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _267262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _267262)
   Call: (270) [system] string('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _267262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _267262)
   Call: (270) [system] compound('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _294204, _294206)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT', [";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0], _297946)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0], _297946)
   Call: (271) [apply] apply:maplist_([";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0], _297946, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0], [_300764|_300766], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    fn let_op_keep_variables_equalities_issue290() {", _300764)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_keep_variables_equalities_issue290() {", _300764)
   Call: (273) [system] var(";;    fn let_op_keep_variables_equalities_issue290() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_keep_variables_equalities_issue290() {", _300764)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_keep_variables_equalities_issue290() {", '$VAR'(_305410))
   Call: (273) [system] atom(";;    fn let_op_keep_variables_equalities_issue290() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_keep_variables_equalities_issue290() {", _300764)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_keep_variables_equalities_issue290() {", _300764)
   Call: (273) [system] ";;    fn let_op_keep_variables_equalities_issue290() {"==true
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_keep_variables_equalities_issue290() {", _300764)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_keep_variables_equalities_issue290() {", _300764)
   Call: (273) [system] ";;    fn let_op_keep_variables_equalities_issue290() {"==false
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_keep_variables_equalities_issue290() {", _300764)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_keep_variables_equalities_issue290() {", _300764)
   Call: (273) [system] ";;    fn let_op_keep_variables_equalities_issue290() {"==[_314690, _314696]
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_keep_variables_equalities_issue290() {", _300764)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_keep_variables_equalities_issue290() {", _300764)
   Call: (273) [system] is_list(";;    fn let_op_keep_variables_equalities_issue290() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_keep_variables_equalities_issue290() {", _300764)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_keep_variables_equalities_issue290() {", _300764)
   Call: (273) [system] string(";;    fn let_op_keep_variables_equalities_issue290() {")
   Exit: (273) [system] string(";;    fn let_op_keep_variables_equalities_issue290() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_keep_variables_equalities_issue290() {", _300764)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_keep_variables_equalities_issue290() {", _300764)
   Call: (273) [system] compound(";;    fn let_op_keep_variables_equalities_issue290() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_keep_variables_equalities_issue290() {", _300764)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_keep_variables_equalities_issue290() {", _300764)
^  Call: (273) [user] symbol(";;    fn let_op_keep_variables_equalities_issue290() {")
^  Unify: (273) [user] symbol(";;    fn let_op_keep_variables_equalities_issue290() {")
   Call: (274) [system] atom(";;    fn let_op_keep_variables_equalities_issue290() {")
   Fail: (274) [system] atom(";;    fn let_op_keep_variables_equalities_issue290() {")
^  Fail: (273) [user] symbol(";;    fn let_op_keep_variables_equalities_issue290() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_keep_variables_equalities_issue290() {", _300764)
   Call: (273) [system] ";;    fn let_op_keep_variables_equalities_issue290() {"=_300764
   Exit: (273) [system] ";;    fn let_op_keep_variables_equalities_issue290() {"=";;    fn let_op_keep_variables_equalities_issue290() {"
^  Exit: (272) [user] mfix_vars1(";;    fn let_op_keep_variables_equalities_issue290() {", ";;    fn let_op_keep_variables_equalities_issue290() {")
   Call: (272) [apply] apply:maplist_([1303, 0], _300766, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1303, 0], [_338762|_338764], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1303, _338762)
^  Unify: (273) [user] mfix_vars1(1303, _338762)
   Call: (274) [system] var(1303)
^  Redo: (273) [user] mfix_vars1(1303, _338762)
^  Unify: (273) [user] mfix_vars1(1303, '$VAR'(_343408))
   Call: (274) [system] atom(1303)
^  Redo: (273) [user] mfix_vars1(1303, _338762)
^  Unify: (273) [user] mfix_vars1(1303, _338762)
   Call: (274) [system] 1303==true
^  Redo: (273) [user] mfix_vars1(1303, _338762)
^  Unify: (273) [user] mfix_vars1(1303, _338762)
   Call: (274) [system] 1303==false
^  Redo: (273) [user] mfix_vars1(1303, _338762)
^  Unify: (273) [user] mfix_vars1(1303, _338762)
   Call: (274) [system] 1303==[_352688, _352694]
^  Redo: (273) [user] mfix_vars1(1303, _338762)
^  Unify: (273) [user] mfix_vars1(1303, _338762)
   Call: (274) [system] is_list(1303)
^  Redo: (273) [user] mfix_vars1(1303, _338762)
^  Unify: (273) [user] mfix_vars1(1303, _338762)
   Call: (274) [system] string(1303)
^  Redo: (273) [user] mfix_vars1(1303, _338762)
^  Unify: (273) [user] mfix_vars1(1303, _338762)
   Call: (274) [system] compound(1303)
^  Redo: (273) [user] mfix_vars1(1303, _338762)
^  Unify: (273) [user] mfix_vars1(1303, _338762)
^  Call: (274) [user] symbol(1303)
^  Unify: (274) [user] symbol(1303)
   Call: (275) [system] atom(1303)
   Fail: (275) [system] atom(1303)
^  Fail: (274) [user] symbol(1303)
^  Redo: (273) [user] mfix_vars1(1303, _338762)
   Call: (274) [system] 1303=_338762
   Exit: (274) [system] 1303=1303
^  Exit: (273) [user] mfix_vars1(1303, 1303)
   Call: (273) [apply] apply:maplist_([0], _338764, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_373088|_373090], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _373088)
^  Unify: (274) [user] mfix_vars1(0, _373088)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _373088)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_377734))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _373088)
^  Unify: (274) [user] mfix_vars1(0, _373088)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _373088)
^  Unify: (274) [user] mfix_vars1(0, _373088)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _373088)
^  Unify: (274) [user] mfix_vars1(0, _373088)
   Call: (275) [system] 0==[_387014, _387020]
^  Redo: (274) [user] mfix_vars1(0, _373088)
^  Unify: (274) [user] mfix_vars1(0, _373088)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _373088)
^  Unify: (274) [user] mfix_vars1(0, _373088)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _373088)
^  Unify: (274) [user] mfix_vars1(0, _373088)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _373088)
^  Unify: (274) [user] mfix_vars1(0, _373088)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _373088)
   Call: (275) [system] 0=_373088
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _373090, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1303, 0], [1303, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0], [";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0], [";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0])
   Call: (270) [system] compound_name_arguments(_267262, '$COMMENT', [";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT', [";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0)\=@='$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _261676)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _423262))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _423262))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _423262))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _423262))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _423262)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _423262)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _428848))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _428848))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _428848)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _428848)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _428848)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0)\=@='$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _423262)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _256064))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _256064))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _256064))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _256064))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _256064)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _256064)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _451168))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _451168))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _451168)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _451168)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _451168)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0)\=@='$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _256064)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0)))
   Call: (261) [system] '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0)\=@='$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _479946, [], _479948)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _479946, [], _479948)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _479946, [], _479948)
   Call: (258) [system] atom('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _479946, [], _479948)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _479946, [], _479948)
   Call: (258) [system] compound('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), _489262, _489264)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT', [";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0])
^  Call: (258) [user] subst_vars([";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0], _491148, [], _479948)
^  Unify: (258) [user] subst_vars([";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0], [";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0], [], [])
   Call: (259) [system] var([";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0])
^  Redo: (258) [user] subst_vars([";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0], _491148, [], _479948)
^  Unify: (258) [user] subst_vars([";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0], [_494884|_494886], [], _479948)
^  Call: (259) [user] subst_vars(";;    fn let_op_keep_variables_equalities_issue290() {", _494884, [], _495824)
^  Unify: (259) [user] subst_vars(";;    fn let_op_keep_variables_equalities_issue290() {", ";;    fn let_op_keep_variables_equalities_issue290() {", [], [])
   Call: (260) [system] var(";;    fn let_op_keep_variables_equalities_issue290() {")
^  Redo: (259) [user] subst_vars(";;    fn let_op_keep_variables_equalities_issue290() {", _494884, [], _495824)
^  Unify: (259) [user] subst_vars(";;    fn let_op_keep_variables_equalities_issue290() {", _494884, [], _495824)
   Call: (260) [system] atom(";;    fn let_op_keep_variables_equalities_issue290() {")
^  Redo: (259) [user] subst_vars(";;    fn let_op_keep_variables_equalities_issue290() {", _494884, [], _495824)
^  Unify: (259) [user] subst_vars(";;    fn let_op_keep_variables_equalities_issue290() {", _494884, [], _495824)
   Call: (260) [system] compound(";;    fn let_op_keep_variables_equalities_issue290() {")
^  Redo: (259) [user] subst_vars(";;    fn let_op_keep_variables_equalities_issue290() {", _494884, [], _495824)
^  Unify: (259) [user] subst_vars(";;    fn let_op_keep_variables_equalities_issue290() {", ";;    fn let_op_keep_variables_equalities_issue290() {", [], [])
^  Exit: (259) [user] subst_vars(";;    fn let_op_keep_variables_equalities_issue290() {", ";;    fn let_op_keep_variables_equalities_issue290() {", [], [])
^  Call: (259) [user] subst_vars([1303, 0], _494886, [], _479948)
^  Unify: (259) [user] subst_vars([1303, 0], [1303, 0], [], [])
   Call: (260) [system] var([1303, 0])
^  Redo: (259) [user] subst_vars([1303, 0], _494886, [], _479948)
^  Unify: (259) [user] subst_vars([1303, 0], [_510756|_510758], [], _479948)
^  Call: (260) [user] subst_vars(1303, _510756, [], _511696)
^  Unify: (260) [user] subst_vars(1303, 1303, [], [])
   Call: (261) [system] var(1303)
^  Redo: (260) [user] subst_vars(1303, _510756, [], _511696)
^  Unify: (260) [user] subst_vars(1303, _510756, [], _511696)
   Call: (261) [system] atom(1303)
^  Redo: (260) [user] subst_vars(1303, _510756, [], _511696)
^  Unify: (260) [user] subst_vars(1303, _510756, [], _511696)
   Call: (261) [system] compound(1303)
^  Redo: (260) [user] subst_vars(1303, _510756, [], _511696)
^  Unify: (260) [user] subst_vars(1303, 1303, [], [])
^  Exit: (260) [user] subst_vars(1303, 1303, [], [])
^  Call: (260) [user] subst_vars([0], _510758, [], _479948)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _5988, [], _5950)
^  Unify: (260) [user] subst_vars([0], [_8620|_8622], [], _5950)
^  Call: (261) [user] subst_vars(0, _8620, [], _9560)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _8620, [], _9560)
^  Unify: (261) [user] subst_vars(0, _8620, [], _9560)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _8620, [], _9560)
^  Unify: (261) [user] subst_vars(0, _8620, [], _9560)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _8620, [], _9560)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _8622, [], _5950)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _8622, [], _5950)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1303, 0], [1303, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0], [";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5948, '$COMMENT', [";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT', [";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), [], [])
   Call: (257) [system] _31978=metta_file_buffer(+, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_op_keep_variables_equalities_issue290() {", 1303, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1304, 0, 46614, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$stream_position'(46614, 1304, 0, 46614)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _84720))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _84720))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _84720)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _84720)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _84720)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _84720)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _90332))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _90332))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _90332))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _90332))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _90332)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _90332)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _95918))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _95918))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _95918)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _95918)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _95918)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _95918)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _95918)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$VAR'(_103378))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _95918)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _95918)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _95918)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _95918)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _95918)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _95918)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0)==[_112658, _112664]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _95918)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _95918)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _95918)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _95918)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _95918)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _95918)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _122860, _122862)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0], _126602)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0], _126602)
   Call: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0], _126602, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0], [_129420|_129422], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _129420)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _129420)
   Call: (273) [system] var(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _129420)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", '$VAR'(_134066))
   Call: (273) [system] atom(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _129420)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _129420)
   Call: (273) [system] ";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _129420)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _129420)
   Call: (273) [system] ";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _129420)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _129420)
   Call: (273) [system] ";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));"==[_143346, _143352]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _129420)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _129420)
   Call: (273) [system] is_list(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _129420)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _129420)
   Call: (273) [system] string(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
   Exit: (273) [system] string(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _129420)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _129420)
   Call: (273) [system] compound(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _129420)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _129420)
^  Call: (273) [user] symbol(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
^  Unify: (273) [user] symbol(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
   Call: (274) [system] atom(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
   Fail: (274) [system] atom(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
^  Fail: (273) [user] symbol(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _129420)
   Call: (273) [system] ";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));"=_129420
   Exit: (273) [system] ";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));"=";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", ";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
   Call: (272) [apply] apply:maplist_([1304, 0], _129422, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1304, 0], [_167418|_167420], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1304, _167418)
^  Unify: (273) [user] mfix_vars1(1304, _167418)
   Call: (274) [system] var(1304)
^  Redo: (273) [user] mfix_vars1(1304, _167418)
^  Unify: (273) [user] mfix_vars1(1304, '$VAR'(_172064))
   Call: (274) [system] atom(1304)
^  Redo: (273) [user] mfix_vars1(1304, _167418)
^  Unify: (273) [user] mfix_vars1(1304, _167418)
   Call: (274) [system] 1304==true
^  Redo: (273) [user] mfix_vars1(1304, _167418)
^  Unify: (273) [user] mfix_vars1(1304, _167418)
   Call: (274) [system] 1304==false
^  Redo: (273) [user] mfix_vars1(1304, _167418)
^  Unify: (273) [user] mfix_vars1(1304, _167418)
   Call: (274) [system] 1304==[_181344, _181350]
^  Redo: (273) [user] mfix_vars1(1304, _167418)
^  Unify: (273) [user] mfix_vars1(1304, _167418)
   Call: (274) [system] is_list(1304)
^  Redo: (273) [user] mfix_vars1(1304, _167418)
^  Unify: (273) [user] mfix_vars1(1304, _167418)
   Call: (274) [system] string(1304)
^  Redo: (273) [user] mfix_vars1(1304, _167418)
^  Unify: (273) [user] mfix_vars1(1304, _167418)
   Call: (274) [system] compound(1304)
^  Redo: (273) [user] mfix_vars1(1304, _167418)
^  Unify: (273) [user] mfix_vars1(1304, _167418)
^  Call: (274) [user] symbol(1304)
^  Unify: (274) [user] symbol(1304)
   Call: (275) [system] atom(1304)
   Fail: (275) [system] atom(1304)
^  Fail: (274) [user] symbol(1304)
^  Redo: (273) [user] mfix_vars1(1304, _167418)
   Call: (274) [system] 1304=_167418
   Exit: (274) [system] 1304=1304
^  Exit: (273) [user] mfix_vars1(1304, 1304)
   Call: (273) [apply] apply:maplist_([0], _167420, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_201744|_201746], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _201744)
^  Unify: (274) [user] mfix_vars1(0, _201744)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _201744)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_206390))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _201744)
^  Unify: (274) [user] mfix_vars1(0, _201744)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _201744)
^  Unify: (274) [user] mfix_vars1(0, _201744)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _201744)
^  Unify: (274) [user] mfix_vars1(0, _201744)
   Call: (275) [system] 0==[_215670, _215676]
^  Redo: (274) [user] mfix_vars1(0, _201744)
^  Unify: (274) [user] mfix_vars1(0, _201744)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _201744)
^  Unify: (274) [user] mfix_vars1(0, _201744)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _201744)
^  Unify: (274) [user] mfix_vars1(0, _201744)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _201744)
^  Unify: (274) [user] mfix_vars1(0, _201744)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _201744)
   Call: (275) [system] 0=_201744
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _201746, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1304, 0], [1304, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0], [";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0], [";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0])
   Call: (270) [system] compound_name_arguments(_95918, '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _90332)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _251918))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _251918))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _251918))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _251918))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _251918)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _251918)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _257504))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _257504))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _257504)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _257504)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _257504)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _251918)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _84720))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _84720))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _84720))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _84720))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _84720)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _84720)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _279824))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _279824))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _279824)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _279824)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _279824)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _84720)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _308602, [], _308604)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _308602, [], _308604)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _308602, [], _308604)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _308602, [], _308604)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _308602, [], _308604)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), _317918, _317920)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0], _319804, [], _308604)
^  Unify: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0], [";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0], [], [])
   Call: (259) [system] var([";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0], _319804, [], _308604)
^  Unify: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0], [_323540|_323542], [], _308604)
^  Call: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _323540, [], _324480)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", ";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", [], [])
   Call: (260) [system] var(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _323540, [], _324480)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _323540, [], _324480)
   Call: (260) [system] atom(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _323540, [], _324480)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _323540, [], _324480)
   Call: (260) [system] compound(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _323540, [], _324480)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", ";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", ";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", [], [])
^  Call: (259) [user] subst_vars([1304, 0], _323542, [], _308604)
^  Unify: (259) [user] subst_vars([1304, 0], [1304, 0], [], [])
   Call: (260) [system] var([1304, 0])
^  Redo: (259) [user] subst_vars([1304, 0], _323542, [], _308604)
^  Unify: (259) [user] subst_vars([1304, 0], [_339412|_339414], [], _308604)
^  Call: (260) [user] subst_vars(1304, _339412, [], _340352)
^  Unify: (260) [user] subst_vars(1304, 1304, [], [])
   Call: (261) [system] var(1304)
^  Redo: (260) [user] subst_vars(1304, _339412, [], _340352)
^  Unify: (260) [user] subst_vars(1304, _339412, [], _340352)
   Call: (261) [system] atom(1304)
^  Redo: (260) [user] subst_vars(1304, _339412, [], _340352)
^  Unify: (260) [user] subst_vars(1304, _339412, [], _340352)
   Call: (261) [system] compound(1304)
^  Redo: (260) [user] subst_vars(1304, _339412, [], _340352)
^  Unify: (260) [user] subst_vars(1304, 1304, [], [])
^  Exit: (260) [user] subst_vars(1304, 1304, [], [])
^  Call: (260) [user] subst_vars([0], _339414, [], _308604)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _339414, [], _308604)
^  Unify: (260) [user] subst_vars([0], [_355284|_355286], [], _308604)
^  Call: (261) [user] subst_vars(0, _355284, [], _356224)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _355284, [], _356224)
^  Unify: (261) [user] subst_vars(0, _355284, [], _356224)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _355284, [], _356224)
^  Unify: (261) [user] subst_vars(0, _355284, [], _356224)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _355284, [], _356224)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _355286, [], _308604)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _355286, [], _308604)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1304, 0], [1304, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0], [";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0], [], [])
   Call: (258) [system] compound_name_arguments(_308602, '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), [], [])
   Call: (257) [system] _378642=metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f f) ($f $x)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1304, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1305, 0, 46722, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$stream_position'(46722, 1305, 0, 46722)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _431384))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _431384))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _431384)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _431384)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _431384)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _431384)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _436996))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _436996))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _436996))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _436996))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _436996)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _436996)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _442582))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _442582))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _442582)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _442582)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _442582)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _442582)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _442582)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$VAR'(_450042))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _442582)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _442582)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _442582)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _442582)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _442582)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _442582)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0)==[_459322, _459328]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _442582)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _442582)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _442582)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _442582)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _442582)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _442582)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _469524, _469526)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0], _473266)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0], _473266)
   Call: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0], _473266, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0], [_476084|_476086], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _476084)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _476084)
   Call: (273) [system] var(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _476084)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", '$VAR'(_480730))
   Call: (273) [system] atom(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _476084)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _476084)
   Call: (273) [system] ";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _476084)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _476084)
   Call: (273) [system] ";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _476084)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _476084)
   Call: (273) [system] ";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));"==[_490010, _490016]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _476084)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _476084)
   Call: (273) [system] is_list(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _476084)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _476084)
   Call: (273) [system] string(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
   Exit: (273) [system] string(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _476084)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _476084)
   Call: (273) [system] compound(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _476084)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _476084)
^  Call: (273) [user] symbol(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
^  Unify: (273) [user] symbol(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
   Call: (274) [system] atom(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
   Fail: (274) [system] atom(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
^  Fail: (273) [user] symbol(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _476084)
   Call: (273) [system] ";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));"=_476084
   Exit: (273) [system] ";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));"=";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", ";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
   Call: (272) [apply] apply:maplist_([1305, 0], _476086, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1305, 0], [_514082|_514084], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1305, _514082)
^  Unify: (273) [user] mfix_vars1(1305, _514082)
   Call: (274) [system] var(1305)
^  Redo: (273) [user] mfix_vars1(1305, _514082)
^  Unify: (273) [user] mfix_vars1(1305, '$VAR'(_518728))
   Call: (274) [system] atom(1305)
^  Redo: (273) [user] mfix_vars1(1305, _514082)
^  Unify: (273) [user] mfix_vars1(1305, _514082)
   Call: (274) [system] 1305==true
^  Redo: (273) [user] mfix_vars1(1305, _6054)
^  Unify: (273) [user] mfix_vars1(1305, _6054)
   Call: (274) [system] 1305==false
^  Redo: (273) [user] mfix_vars1(1305, _6054)
^  Unify: (273) [user] mfix_vars1(1305, _6054)
   Call: (274) [system] 1305==[_10126, _10132]
^  Redo: (273) [user] mfix_vars1(1305, _6054)
^  Unify: (273) [user] mfix_vars1(1305, _6054)
   Call: (274) [system] is_list(1305)
^  Redo: (273) [user] mfix_vars1(1305, _6054)
^  Unify: (273) [user] mfix_vars1(1305, _6054)
   Call: (274) [system] string(1305)
^  Redo: (273) [user] mfix_vars1(1305, _6054)
^  Unify: (273) [user] mfix_vars1(1305, _6054)
   Call: (274) [system] compound(1305)
^  Redo: (273) [user] mfix_vars1(1305, _6054)
^  Unify: (273) [user] mfix_vars1(1305, _6054)
^  Call: (274) [user] symbol(1305)
^  Unify: (274) [user] symbol(1305)
   Call: (275) [system] atom(1305)
   Fail: (275) [system] atom(1305)
^  Fail: (274) [user] symbol(1305)
^  Redo: (273) [user] mfix_vars1(1305, _6054)
   Call: (274) [system] 1305=_6054
   Exit: (274) [system] 1305=1305
^  Exit: (273) [user] mfix_vars1(1305, 1305)
   Call: (273) [apply] apply:maplist_([0], _6056, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_30526|_30528], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _30526)
^  Unify: (274) [user] mfix_vars1(0, _30526)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _30526)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_35172))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _30526)
^  Unify: (274) [user] mfix_vars1(0, _30526)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _30526)
^  Unify: (274) [user] mfix_vars1(0, _30526)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _30526)
^  Unify: (274) [user] mfix_vars1(0, _30526)
   Call: (275) [system] 0==[_44452, _44458]
^  Redo: (274) [user] mfix_vars1(0, _30526)
^  Unify: (274) [user] mfix_vars1(0, _30526)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _30526)
^  Unify: (274) [user] mfix_vars1(0, _30526)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _30526)
^  Unify: (274) [user] mfix_vars1(0, _30526)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _30526)
^  Unify: (274) [user] mfix_vars1(0, _30526)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _30526)
   Call: (275) [system] 0=_30526
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _30528, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1305, 0], [1305, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0], [";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0], [";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0])
   Call: (270) [system] compound_name_arguments(_6002, '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _5988)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _80700))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _80700))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _80700))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _80700))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _80700)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _80700)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _86286))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _86286))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _86286)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _86286)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _86286)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _80700)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _5968))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _5968))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _5968))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _5968))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _5968)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _5968)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _108606))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _108606))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _108606)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _108606)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _108606)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _5968)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _137384, [], _137386)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _137384, [], _137386)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _137384, [], _137386)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _137384, [], _137386)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _137384, [], _137386)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), _146700, _146702)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0], _148586, [], _137386)
^  Unify: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0], [";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0], [], [])
   Call: (259) [system] var([";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0], _148586, [], _137386)
^  Unify: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0], [_152322|_152324], [], _137386)
^  Call: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _152322, [], _153262)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", ";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", [], [])
   Call: (260) [system] var(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _152322, [], _153262)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _152322, [], _153262)
   Call: (260) [system] atom(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _152322, [], _153262)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _152322, [], _153262)
   Call: (260) [system] compound(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", _152322, [], _153262)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", ";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", ";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", [], [])
^  Call: (259) [user] subst_vars([1305, 0], _152324, [], _137386)
^  Unify: (259) [user] subst_vars([1305, 0], [1305, 0], [], [])
   Call: (260) [system] var([1305, 0])
^  Redo: (259) [user] subst_vars([1305, 0], _152324, [], _137386)
^  Unify: (259) [user] subst_vars([1305, 0], [_168194|_168196], [], _137386)
^  Call: (260) [user] subst_vars(1305, _168194, [], _169134)
^  Unify: (260) [user] subst_vars(1305, 1305, [], [])
   Call: (261) [system] var(1305)
^  Redo: (260) [user] subst_vars(1305, _168194, [], _169134)
^  Unify: (260) [user] subst_vars(1305, _168194, [], _169134)
   Call: (261) [system] atom(1305)
^  Redo: (260) [user] subst_vars(1305, _168194, [], _169134)
^  Unify: (260) [user] subst_vars(1305, _168194, [], _169134)
   Call: (261) [system] compound(1305)
^  Redo: (260) [user] subst_vars(1305, _168194, [], _169134)
^  Unify: (260) [user] subst_vars(1305, 1305, [], [])
^  Exit: (260) [user] subst_vars(1305, 1305, [], [])
^  Call: (260) [user] subst_vars([0], _168196, [], _137386)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _168196, [], _137386)
^  Unify: (260) [user] subst_vars([0], [_184066|_184068], [], _137386)
^  Call: (261) [user] subst_vars(0, _184066, [], _185006)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _184066, [], _185006)
^  Unify: (261) [user] subst_vars(0, _184066, [], _185006)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _184066, [], _185006)
^  Unify: (261) [user] subst_vars(0, _184066, [], _185006)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _184066, [], _185006)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _184068, [], _137386)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _184068, [], _137386)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1305, 0], [1305, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0], [";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0], [], [])
   Call: (258) [system] compound_name_arguments(_137384, '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), [], [])
   Call: (257) [system] _207424=metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let* (($f $x) ($f f)) $x)\"), Ok(vec![vec![expr!(\"f\")]]));", 1305, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1306, 0, 46830, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$stream_position'(46830, 1306, 0, 46830)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _260174))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _260174))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _260174)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _260174)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _260174)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _260174)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _265786))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _265786))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _265786))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _265786))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _265786)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _265786)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _271372))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _271372))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _271372)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _271372)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _271372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _271372)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _271372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$VAR'(_278832))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _271372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _271372)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _271372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _271372)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _271372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _271372)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0)==[_288112, _288118]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _271372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _271372)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _271372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _271372)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _271372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _271372)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _298314, _298316)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0], _302056)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0], _302056)
   Call: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0], _302056, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0], [_304874|_304876], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _304874)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _304874)
   Call: (273) [system] var(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _304874)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", '$VAR'(_309520))
   Call: (273) [system] atom(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _304874)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _304874)
   Call: (273) [system] ";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _304874)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _304874)
   Call: (273) [system] ";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _304874)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _304874)
   Call: (273) [system] ";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));"==[_318800, _318806]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _304874)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _304874)
   Call: (273) [system] is_list(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _304874)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _304874)
   Call: (273) [system] string(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
   Exit: (273) [system] string(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _304874)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _304874)
   Call: (273) [system] compound(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _304874)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _304874)
^  Call: (273) [user] symbol(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
^  Unify: (273) [user] symbol(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
   Call: (274) [system] atom(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
   Fail: (274) [system] atom(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
^  Fail: (273) [user] symbol(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _304874)
   Call: (273) [system] ";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));"=_304874
   Exit: (273) [system] ";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));"=";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", ";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
   Call: (272) [apply] apply:maplist_([1306, 0], _304876, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1306, 0], [_342872|_342874], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1306, _342872)
^  Unify: (273) [user] mfix_vars1(1306, _342872)
   Call: (274) [system] var(1306)
^  Redo: (273) [user] mfix_vars1(1306, _342872)
^  Unify: (273) [user] mfix_vars1(1306, '$VAR'(_347518))
   Call: (274) [system] atom(1306)
^  Redo: (273) [user] mfix_vars1(1306, _342872)
^  Unify: (273) [user] mfix_vars1(1306, _342872)
   Call: (274) [system] 1306==true
^  Redo: (273) [user] mfix_vars1(1306, _342872)
^  Unify: (273) [user] mfix_vars1(1306, _342872)
   Call: (274) [system] 1306==false
^  Redo: (273) [user] mfix_vars1(1306, _342872)
^  Unify: (273) [user] mfix_vars1(1306, _342872)
   Call: (274) [system] 1306==[_356798, _356804]
^  Redo: (273) [user] mfix_vars1(1306, _342872)
^  Unify: (273) [user] mfix_vars1(1306, _342872)
   Call: (274) [system] is_list(1306)
^  Redo: (273) [user] mfix_vars1(1306, _342872)
^  Unify: (273) [user] mfix_vars1(1306, _342872)
   Call: (274) [system] string(1306)
^  Redo: (273) [user] mfix_vars1(1306, _342872)
^  Unify: (273) [user] mfix_vars1(1306, _342872)
   Call: (274) [system] compound(1306)
^  Redo: (273) [user] mfix_vars1(1306, _342872)
^  Unify: (273) [user] mfix_vars1(1306, _342872)
^  Call: (274) [user] symbol(1306)
^  Unify: (274) [user] symbol(1306)
   Call: (275) [system] atom(1306)
   Fail: (275) [system] atom(1306)
^  Fail: (274) [user] symbol(1306)
^  Redo: (273) [user] mfix_vars1(1306, _342872)
   Call: (274) [system] 1306=_342872
   Exit: (274) [system] 1306=1306
^  Exit: (273) [user] mfix_vars1(1306, 1306)
   Call: (273) [apply] apply:maplist_([0], _342874, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_377198|_377200], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _377198)
^  Unify: (274) [user] mfix_vars1(0, _377198)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _377198)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_381844))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _377198)
^  Unify: (274) [user] mfix_vars1(0, _377198)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _377198)
^  Unify: (274) [user] mfix_vars1(0, _377198)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _377198)
^  Unify: (274) [user] mfix_vars1(0, _377198)
   Call: (275) [system] 0==[_391124, _391130]
^  Redo: (274) [user] mfix_vars1(0, _377198)
^  Unify: (274) [user] mfix_vars1(0, _377198)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _377198)
^  Unify: (274) [user] mfix_vars1(0, _377198)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _377198)
^  Unify: (274) [user] mfix_vars1(0, _377198)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _377198)
^  Unify: (274) [user] mfix_vars1(0, _377198)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _377198)
   Call: (275) [system] 0=_377198
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _377200, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1306, 0], [1306, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0], [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0], [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0])
   Call: (270) [system] compound_name_arguments(_271372, '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _265786)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _427372))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _427372))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _427372))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _427372))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _427372)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _427372)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _432958))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _432958))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _432958)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _432958)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _432958)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _427372)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _260174))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _260174))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _260174))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _260174))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _260174)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _260174)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _455278))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _455278))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _455278)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _455278)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _455278)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _260174)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _484056, [], _484058)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _484056, [], _484058)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _484056, [], _484058)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _484056, [], _484058)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _484056, [], _484058)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), _493372, _493374)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0], _495258, [], _484058)
^  Unify: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0], [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0], [], [])
   Call: (259) [system] var([";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0], _495258, [], _484058)
^  Unify: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0], [_498994|_498996], [], _484058)
^  Call: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _498994, [], _499934)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", ";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", [], [])
   Call: (260) [system] var(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _498994, [], _499934)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _498994, [], _499934)
   Call: (260) [system] atom(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _498994, [], _499934)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _498994, [], _499934)
   Call: (260) [system] compound(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _498994, [], _499934)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", ";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", ";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", [], [])
^  Call: (259) [user] subst_vars([1306, 0], _498996, [], _484058)
^  Unify: (259) [user] subst_vars([1306, 0], [1306, 0], [], [])
   Call: (260) [system] var([1306, 0])
^  Redo: (259) [user] subst_vars([1306, 0], _498996, [], _484058)
^  Unify: (259) [user] subst_vars([1306, 0], [_514866|_514868], [], _484058)
^  Call: (260) [user] subst_vars(1306, _514866, [], _515806)
^  Unify: (260) [user] subst_vars(1306, 1306, [], [])
   Call: (261) [system] var(1306)
^  Redo: (260) [user] subst_vars(1306, _514866, [], _515806)
^  Unify: (260) [user] subst_vars(1306, _514866, [], _515806)
   Call: (261) [system] atom(1306)
^  Redo: (260) [user] subst_vars(1306, _514866, [], _515806)
^  Unify: (260) [user] subst_vars(1306, _514866, [], _515806)
   Call: (261) [system] compound(1306)
^  Redo: (260) [user] subst_vars(1306, _6008, [], _6012)
^  Unify: (260) [user] subst_vars(1306, 1306, [], [])
^  Exit: (260) [user] subst_vars(1306, 1306, [], [])
^  Call: (260) [user] subst_vars([0], _6010, [], _5972)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _6010, [], _5972)
^  Unify: (260) [user] subst_vars([0], [_12552|_12554], [], _5972)
^  Call: (261) [user] subst_vars(0, _12552, [], _13492)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _12552, [], _13492)
^  Unify: (261) [user] subst_vars(0, _12552, [], _13492)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _12552, [], _13492)
^  Unify: (261) [user] subst_vars(0, _12552, [], _13492)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _12552, [], _13492)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _12554, [], _5972)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _12554, [], _5972)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1306, 0], [1306, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0], [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5970, '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), [], [])
   Call: (257) [system] _35910=metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $y A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1306, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1307, 0, 46972, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$stream_position'(46972, 1307, 0, 46972)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _88660))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _88660))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _88660)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _88660)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _88660)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _88660)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _94272))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _94272))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _94272))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _94272))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _94272)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _94272)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _99858))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _99858))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _99858)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _99858)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _99858)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _99858)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _99858)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$VAR'(_107318))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _99858)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _99858)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _99858)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _99858)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _99858)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _99858)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0)==[_116598, _116604]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _99858)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _99858)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _99858)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _99858)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _99858)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _99858)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _126800, _126802)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0], _130542)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0], _130542)
   Call: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0], _130542, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0], [_133360|_133362], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _133360)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _133360)
   Call: (273) [system] var(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _133360)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", '$VAR'(_138006))
   Call: (273) [system] atom(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _133360)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _133360)
   Call: (273) [system] ";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _133360)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _133360)
   Call: (273) [system] ";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _133360)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _133360)
   Call: (273) [system] ";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));"==[_147286, _147292]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _133360)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _133360)
   Call: (273) [system] is_list(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _133360)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _133360)
   Call: (273) [system] string(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
   Exit: (273) [system] string(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _133360)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _133360)
   Call: (273) [system] compound(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _133360)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _133360)
^  Call: (273) [user] symbol(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
^  Unify: (273) [user] symbol(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
   Call: (274) [system] atom(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
   Fail: (274) [system] atom(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
^  Fail: (273) [user] symbol(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _133360)
   Call: (273) [system] ";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));"=_133360
   Exit: (273) [system] ";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));"=";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", ";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
   Call: (272) [apply] apply:maplist_([1307, 0], _133362, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1307, 0], [_171358|_171360], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1307, _171358)
^  Unify: (273) [user] mfix_vars1(1307, _171358)
   Call: (274) [system] var(1307)
^  Redo: (273) [user] mfix_vars1(1307, _171358)
^  Unify: (273) [user] mfix_vars1(1307, '$VAR'(_176004))
   Call: (274) [system] atom(1307)
^  Redo: (273) [user] mfix_vars1(1307, _171358)
^  Unify: (273) [user] mfix_vars1(1307, _171358)
   Call: (274) [system] 1307==true
^  Redo: (273) [user] mfix_vars1(1307, _171358)
^  Unify: (273) [user] mfix_vars1(1307, _171358)
   Call: (274) [system] 1307==false
^  Redo: (273) [user] mfix_vars1(1307, _171358)
^  Unify: (273) [user] mfix_vars1(1307, _171358)
   Call: (274) [system] 1307==[_185284, _185290]
^  Redo: (273) [user] mfix_vars1(1307, _171358)
^  Unify: (273) [user] mfix_vars1(1307, _171358)
   Call: (274) [system] is_list(1307)
^  Redo: (273) [user] mfix_vars1(1307, _171358)
^  Unify: (273) [user] mfix_vars1(1307, _171358)
   Call: (274) [system] string(1307)
^  Redo: (273) [user] mfix_vars1(1307, _171358)
^  Unify: (273) [user] mfix_vars1(1307, _171358)
   Call: (274) [system] compound(1307)
^  Redo: (273) [user] mfix_vars1(1307, _171358)
^  Unify: (273) [user] mfix_vars1(1307, _171358)
^  Call: (274) [user] symbol(1307)
^  Unify: (274) [user] symbol(1307)
   Call: (275) [system] atom(1307)
   Fail: (275) [system] atom(1307)
^  Fail: (274) [user] symbol(1307)
^  Redo: (273) [user] mfix_vars1(1307, _171358)
   Call: (274) [system] 1307=_171358
   Exit: (274) [system] 1307=1307
^  Exit: (273) [user] mfix_vars1(1307, 1307)
   Call: (273) [apply] apply:maplist_([0], _171360, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_205684|_205686], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _205684)
^  Unify: (274) [user] mfix_vars1(0, _205684)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _205684)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_210330))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _205684)
^  Unify: (274) [user] mfix_vars1(0, _205684)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _205684)
^  Unify: (274) [user] mfix_vars1(0, _205684)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _205684)
^  Unify: (274) [user] mfix_vars1(0, _205684)
   Call: (275) [system] 0==[_219610, _219616]
^  Redo: (274) [user] mfix_vars1(0, _205684)
^  Unify: (274) [user] mfix_vars1(0, _205684)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _205684)
^  Unify: (274) [user] mfix_vars1(0, _205684)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _205684)
^  Unify: (274) [user] mfix_vars1(0, _205684)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _205684)
^  Unify: (274) [user] mfix_vars1(0, _205684)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _205684)
   Call: (275) [system] 0=_205684
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _205686, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1307, 0], [1307, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0], [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0], [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0])
   Call: (270) [system] compound_name_arguments(_99858, '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _94272)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _255858))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _255858))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _255858))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _255858))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _255858)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _255858)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _261444))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _261444))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _261444)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _261444)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _261444)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _255858)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _88660))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _88660))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _88660))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _88660))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _88660)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _88660)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _283764))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _283764))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _283764)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _283764)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _283764)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _88660)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _312542, [], _312544)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _312542, [], _312544)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _312542, [], _312544)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _312542, [], _312544)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _312542, [], _312544)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), _321858, _321860)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0], _323744, [], _312544)
^  Unify: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0], [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0], [], [])
   Call: (259) [system] var([";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0], _323744, [], _312544)
^  Unify: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0], [_327480|_327482], [], _312544)
^  Call: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _327480, [], _328420)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", ";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", [], [])
   Call: (260) [system] var(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _327480, [], _328420)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _327480, [], _328420)
   Call: (260) [system] atom(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _327480, [], _328420)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _327480, [], _328420)
   Call: (260) [system] compound(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", _327480, [], _328420)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", ";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", ";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", [], [])
^  Call: (259) [user] subst_vars([1307, 0], _327482, [], _312544)
^  Unify: (259) [user] subst_vars([1307, 0], [1307, 0], [], [])
   Call: (260) [system] var([1307, 0])
^  Redo: (259) [user] subst_vars([1307, 0], _327482, [], _312544)
^  Unify: (259) [user] subst_vars([1307, 0], [_343352|_343354], [], _312544)
^  Call: (260) [user] subst_vars(1307, _343352, [], _344292)
^  Unify: (260) [user] subst_vars(1307, 1307, [], [])
   Call: (261) [system] var(1307)
^  Redo: (260) [user] subst_vars(1307, _343352, [], _344292)
^  Unify: (260) [user] subst_vars(1307, _343352, [], _344292)
   Call: (261) [system] atom(1307)
^  Redo: (260) [user] subst_vars(1307, _343352, [], _344292)
^  Unify: (260) [user] subst_vars(1307, _343352, [], _344292)
   Call: (261) [system] compound(1307)
^  Redo: (260) [user] subst_vars(1307, _343352, [], _344292)
^  Unify: (260) [user] subst_vars(1307, 1307, [], [])
^  Exit: (260) [user] subst_vars(1307, 1307, [], [])
^  Call: (260) [user] subst_vars([0], _343354, [], _312544)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _343354, [], _312544)
^  Unify: (260) [user] subst_vars([0], [_359224|_359226], [], _312544)
^  Call: (261) [user] subst_vars(0, _359224, [], _360164)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _359224, [], _360164)
^  Unify: (261) [user] subst_vars(0, _359224, [], _360164)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _359224, [], _360164)
^  Unify: (261) [user] subst_vars(0, _359224, [], _360164)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _359224, [], _360164)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _359226, [], _312544)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _359226, [], _312544)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1307, 0], [1307, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0], [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0], [], [])
   Call: (258) [system] compound_name_arguments(_312542, '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT', [";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), [], [])
   Call: (257) [system] _382582=metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(\"!(let (quote ($x $x)) (quote ($z $y)) (let $z A ($z $y)))\"), Ok(vec![vec![expr!(\"A\" \"A\")]]));", 1307, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1308, 0, 47114, '$COMMENT'(";;    }", 1308, 0), '$stream_position'(47114, 1308, 0, 47114)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1308, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1308, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    }", 1308, 0), _435300))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1308, 0), _435300))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    }", 1308, 0), _435300)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1308, 0), _435300)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1308, 0), _435300)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1308, 0), _435300)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    }", 1308, 0), _440912))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1308, 0), _440912))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1308, 0), _440912))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1308, 0), _440912))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1308, 0), _440912)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1308, 0), _440912)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    }", 1308, 0), _446498))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1308, 0), _446498))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    }", 1308, 0), _446498)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1308, 0), _446498)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1308, 0), _446498)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1308, 0), _446498)
   Call: (270) [system] var('$COMMENT'(";;    }", 1308, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1308, 0), _446498)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1308, 0), '$VAR'(_453958))
   Call: (270) [system] atom('$COMMENT'(";;    }", 1308, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1308, 0), _446498)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1308, 0), _446498)
   Call: (270) [system] '$COMMENT'(";;    }", 1308, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1308, 0), _446498)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1308, 0), _446498)
   Call: (270) [system] '$COMMENT'(";;    }", 1308, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1308, 0), _446498)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1308, 0), _446498)
   Call: (270) [system] '$COMMENT'(";;    }", 1308, 0)==[_463238, _463244]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1308, 0), _446498)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1308, 0), _446498)
   Call: (270) [system] is_list('$COMMENT'(";;    }", 1308, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1308, 0), _446498)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1308, 0), _446498)
   Call: (270) [system] string('$COMMENT'(";;    }", 1308, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1308, 0), _446498)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1308, 0), _446498)
   Call: (270) [system] compound('$COMMENT'(";;    }", 1308, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    }", 1308, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1308, 0), _473440, _473442)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1308, 0), '$COMMENT', [";;    }", 1308, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    }", 1308, 0], _477182)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1308, 0], _477182)
   Call: (271) [apply] apply:maplist_([";;    }", 1308, 0], _477182, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    }", 1308, 0], [_480000|_480002], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    }", _480000)
^  Unify: (272) [user] mfix_vars1(";;    }", _480000)
   Call: (273) [system] var(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _480000)
^  Unify: (272) [user] mfix_vars1(";;    }", '$VAR'(_484646))
   Call: (273) [system] atom(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _480000)
^  Unify: (272) [user] mfix_vars1(";;    }", _480000)
   Call: (273) [system] ";;    }"==true
^  Redo: (272) [user] mfix_vars1(";;    }", _480000)
^  Unify: (272) [user] mfix_vars1(";;    }", _480000)
   Call: (273) [system] ";;    }"==false
^  Redo: (272) [user] mfix_vars1(";;    }", _480000)
^  Unify: (272) [user] mfix_vars1(";;    }", _480000)
   Call: (273) [system] ";;    }"==[_493926, _493932]
^  Redo: (272) [user] mfix_vars1(";;    }", _480000)
^  Unify: (272) [user] mfix_vars1(";;    }", _480000)
   Call: (273) [system] is_list(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _480000)
^  Unify: (272) [user] mfix_vars1(";;    }", _480000)
   Call: (273) [system] string(";;    }")
   Exit: (273) [system] string(";;    }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    }", _480000)
^  Unify: (272) [user] mfix_vars1(";;    }", _480000)
   Call: (273) [system] compound(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _480000)
^  Unify: (272) [user] mfix_vars1(";;    }", _480000)
^  Call: (273) [user] symbol(";;    }")
^  Unify: (273) [user] symbol(";;    }")
   Call: (274) [system] atom(";;    }")
   Fail: (274) [system] atom(";;    }")
^  Fail: (273) [user] symbol(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _480000)
   Call: (273) [system] ";;    }"=_480000
   Exit: (273) [system] ";;    }"=";;    }"
^  Exit: (272) [user] mfix_vars1(";;    }", ";;    }")
   Call: (272) [apply] apply:maplist_([1308, 0], _480002, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1308, 0], [_517998|_518000], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1308, _517998)
^  Unify: (273) [user] mfix_vars1(1308, _517998)
   Call: (274) [system] var(1308)
^  Redo: (273) [user] mfix_vars1(1308, _517998)
^  Unify: (273) [user] mfix_vars1(1308, '$VAR'(_522644))
   Call: (274) [system] atom(1308)
^  Redo: (273) [user] mfix_vars1(1308, _6030)
^  Unify: (273) [user] mfix_vars1(1308, _6030)
   Call: (274) [system] 1308==true
^  Redo: (273) [user] mfix_vars1(1308, _6030)
^  Unify: (273) [user] mfix_vars1(1308, _6030)
   Call: (274) [system] 1308==false
^  Redo: (273) [user] mfix_vars1(1308, _6030)
^  Unify: (273) [user] mfix_vars1(1308, _6030)
   Call: (274) [system] 1308==[_14060, _14066]
^  Redo: (273) [user] mfix_vars1(1308, _6030)
^  Unify: (273) [user] mfix_vars1(1308, _6030)
   Call: (274) [system] is_list(1308)
^  Redo: (273) [user] mfix_vars1(1308, _6030)
^  Unify: (273) [user] mfix_vars1(1308, _6030)
   Call: (274) [system] string(1308)
^  Redo: (273) [user] mfix_vars1(1308, _6030)
^  Unify: (273) [user] mfix_vars1(1308, _6030)
   Call: (274) [system] compound(1308)
^  Redo: (273) [user] mfix_vars1(1308, _6030)
^  Unify: (273) [user] mfix_vars1(1308, _6030)
^  Call: (274) [user] symbol(1308)
^  Unify: (274) [user] symbol(1308)
   Call: (275) [system] atom(1308)
   Fail: (275) [system] atom(1308)
^  Fail: (274) [user] symbol(1308)
^  Redo: (273) [user] mfix_vars1(1308, _6030)
   Call: (274) [system] 1308=_6030
   Exit: (274) [system] 1308=1308
^  Exit: (273) [user] mfix_vars1(1308, 1308)
   Call: (273) [apply] apply:maplist_([0], _6032, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_34460|_34462], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _34460)
^  Unify: (274) [user] mfix_vars1(0, _34460)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _34460)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_39106))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _34460)
^  Unify: (274) [user] mfix_vars1(0, _34460)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _34460)
^  Unify: (274) [user] mfix_vars1(0, _34460)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _34460)
^  Unify: (274) [user] mfix_vars1(0, _34460)
   Call: (275) [system] 0==[_48386, _48392]
^  Redo: (274) [user] mfix_vars1(0, _34460)
^  Unify: (274) [user] mfix_vars1(0, _34460)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _34460)
^  Unify: (274) [user] mfix_vars1(0, _34460)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _34460)
^  Unify: (274) [user] mfix_vars1(0, _34460)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _34460)
^  Unify: (274) [user] mfix_vars1(0, _34460)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _34460)
   Call: (275) [system] 0=_34460
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _34462, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1308, 0], [1308, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    }", 1308, 0], [";;    }", 1308, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1308, 0], [";;    }", 1308, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";;    }", 1308, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1308, 0), '$COMMENT', [";;    }", 1308, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1308, 0)\=@='$COMMENT'(";;    }", 1308, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1308, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    }", 1308, 0), _84634))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1308, 0), _84634))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1308, 0), _84634))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1308, 0), _84634))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1308, 0), _84634)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1308, 0), _84634)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    }", 1308, 0), _90220))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1308, 0), _90220))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    }", 1308, 0), _90220)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1308, 0), _90220)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    }", 1308, 0), _90220)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1308, 0)\=@='$COMMENT'(";;    }", 1308, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1308, 0), _84634)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    }", 1308, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1308, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1308, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1308, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1308, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1308, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    }", 1308, 0), _112540))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1308, 0), _112540))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    }", 1308, 0), _112540)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1308, 0), _112540)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    }", 1308, 0), _112540)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1308, 0)\=@='$COMMENT'(";;    }", 1308, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1308, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0)))
   Call: (261) [system] '$COMMENT'(";;    }", 1308, 0)\=@='$COMMENT'(";;    }", 1308, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1308, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1308, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1308, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1308, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1308, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    }", 1308, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    }", 1308, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    }", 1308, 0), _141318, [], _141320)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    }", 1308, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1308, 0), _141318, [], _141320)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1308, 0), _141318, [], _141320)
   Call: (258) [system] atom('$COMMENT'(";;    }", 1308, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1308, 0), _141318, [], _141320)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1308, 0), _141318, [], _141320)
   Call: (258) [system] compound('$COMMENT'(";;    }", 1308, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    }", 1308, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1308, 0), _150634, _150636)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1308, 0), '$COMMENT', [";;    }", 1308, 0])
^  Call: (258) [user] subst_vars([";;    }", 1308, 0], _152520, [], _141320)
^  Unify: (258) [user] subst_vars([";;    }", 1308, 0], [";;    }", 1308, 0], [], [])
   Call: (259) [system] var([";;    }", 1308, 0])
^  Redo: (258) [user] subst_vars([";;    }", 1308, 0], _152520, [], _141320)
^  Unify: (258) [user] subst_vars([";;    }", 1308, 0], [_156256|_156258], [], _141320)
^  Call: (259) [user] subst_vars(";;    }", _156256, [], _157196)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
   Call: (260) [system] var(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _156256, [], _157196)
^  Unify: (259) [user] subst_vars(";;    }", _156256, [], _157196)
   Call: (260) [system] atom(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _156256, [], _157196)
^  Unify: (259) [user] subst_vars(";;    }", _156256, [], _157196)
   Call: (260) [system] compound(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _156256, [], _157196)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Exit: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Call: (259) [user] subst_vars([1308, 0], _156258, [], _141320)
^  Unify: (259) [user] subst_vars([1308, 0], [1308, 0], [], [])
   Call: (260) [system] var([1308, 0])
^  Redo: (259) [user] subst_vars([1308, 0], _156258, [], _141320)
^  Unify: (259) [user] subst_vars([1308, 0], [_172128|_172130], [], _141320)
^  Call: (260) [user] subst_vars(1308, _172128, [], _173068)
^  Unify: (260) [user] subst_vars(1308, 1308, [], [])
   Call: (261) [system] var(1308)
^  Redo: (260) [user] subst_vars(1308, _172128, [], _173068)
^  Unify: (260) [user] subst_vars(1308, _172128, [], _173068)
   Call: (261) [system] atom(1308)
^  Redo: (260) [user] subst_vars(1308, _172128, [], _173068)
^  Unify: (260) [user] subst_vars(1308, _172128, [], _173068)
   Call: (261) [system] compound(1308)
^  Redo: (260) [user] subst_vars(1308, _172128, [], _173068)
^  Unify: (260) [user] subst_vars(1308, 1308, [], [])
^  Exit: (260) [user] subst_vars(1308, 1308, [], [])
^  Call: (260) [user] subst_vars([0], _172130, [], _141320)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _172130, [], _141320)
^  Unify: (260) [user] subst_vars([0], [_188000|_188002], [], _141320)
^  Call: (261) [user] subst_vars(0, _188000, [], _188940)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _188000, [], _188940)
^  Unify: (261) [user] subst_vars(0, _188000, [], _188940)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _188000, [], _188940)
^  Unify: (261) [user] subst_vars(0, _188000, [], _188940)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _188000, [], _188940)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _188002, [], _141320)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _188002, [], _141320)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1308, 0], [1308, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    }", 1308, 0], [";;    }", 1308, 0], [], [])
   Call: (258) [system] compound_name_arguments(_141318, '$COMMENT', [";;    }", 1308, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1308, 0), '$COMMENT', [";;    }", 1308, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    }", 1308, 0), '$COMMENT'(";;    }", 1308, 0), [], [])
   Call: (257) [system] _211358=metta_file_buffer(+, '$COMMENT'(";;    }", 1308, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    }", 1308, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    }", 1308, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1308, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1308, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1308, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1308, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1308, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1308, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1309, 0, 47122, '$COMMENT'(";; Converted:", 1309, 0), '$stream_position'(47122, 1309, 0, 47122)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1309, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1309, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1309, 0), _264076))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1309, 0), _264076))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1309, 0), _264076)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1309, 0), _264076)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1309, 0), _264076)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1309, 0), _264076)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1309, 0), _269688))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1309, 0), _269688))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1309, 0), _269688))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1309, 0), _269688))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1309, 0), _269688)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1309, 0), _269688)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1309, 0), _275274))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1309, 0), _275274))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1309, 0), _275274)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1309, 0), _275274)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1309, 0), _275274)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1309, 0), _275274)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1309, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1309, 0), _275274)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1309, 0), '$VAR'(_282734))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1309, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1309, 0), _275274)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1309, 0), _275274)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1309, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1309, 0), _275274)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1309, 0), _275274)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1309, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1309, 0), _275274)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1309, 0), _275274)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1309, 0)==[_292014, _292020]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1309, 0), _275274)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1309, 0), _275274)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1309, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1309, 0), _275274)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1309, 0), _275274)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1309, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1309, 0), _275274)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1309, 0), _275274)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1309, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1309, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1309, 0), _302216, _302218)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1309, 0), '$COMMENT', [";; Converted:", 1309, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1309, 0], _305958)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1309, 0], _305958)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1309, 0], _305958, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1309, 0], [_308776|_308778], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _308776)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _308776)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _308776)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_313422))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _308776)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _308776)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _308776)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _308776)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _308776)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _308776)
   Call: (273) [system] ";; Converted:"==[_322702, _322708]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _308776)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _308776)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _308776)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _308776)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _308776)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _308776)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _308776)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _308776)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _308776)
   Call: (273) [system] ";; Converted:"=_308776
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1309, 0], _308778, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1309, 0], [_346774|_346776], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1309, _346774)
^  Unify: (273) [user] mfix_vars1(1309, _346774)
   Call: (274) [system] var(1309)
^  Redo: (273) [user] mfix_vars1(1309, _346774)
^  Unify: (273) [user] mfix_vars1(1309, '$VAR'(_351420))
   Call: (274) [system] atom(1309)
^  Redo: (273) [user] mfix_vars1(1309, _346774)
^  Unify: (273) [user] mfix_vars1(1309, _346774)
   Call: (274) [system] 1309==true
^  Redo: (273) [user] mfix_vars1(1309, _346774)
^  Unify: (273) [user] mfix_vars1(1309, _346774)
   Call: (274) [system] 1309==false
^  Redo: (273) [user] mfix_vars1(1309, _346774)
^  Unify: (273) [user] mfix_vars1(1309, _346774)
   Call: (274) [system] 1309==[_360700, _360706]
^  Redo: (273) [user] mfix_vars1(1309, _346774)
^  Unify: (273) [user] mfix_vars1(1309, _346774)
   Call: (274) [system] is_list(1309)
^  Redo: (273) [user] mfix_vars1(1309, _346774)
^  Unify: (273) [user] mfix_vars1(1309, _346774)
   Call: (274) [system] string(1309)
^  Redo: (273) [user] mfix_vars1(1309, _346774)
^  Unify: (273) [user] mfix_vars1(1309, _346774)
   Call: (274) [system] compound(1309)
^  Redo: (273) [user] mfix_vars1(1309, _346774)
^  Unify: (273) [user] mfix_vars1(1309, _346774)
^  Call: (274) [user] symbol(1309)
^  Unify: (274) [user] symbol(1309)
   Call: (275) [system] atom(1309)
   Fail: (275) [system] atom(1309)
^  Fail: (274) [user] symbol(1309)
^  Redo: (273) [user] mfix_vars1(1309, _346774)
   Call: (274) [system] 1309=_346774
   Exit: (274) [system] 1309=1309
^  Exit: (273) [user] mfix_vars1(1309, 1309)
   Call: (273) [apply] apply:maplist_([0], _346776, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_381100|_381102], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _381100)
^  Unify: (274) [user] mfix_vars1(0, _381100)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _381100)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_385746))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _381100)
^  Unify: (274) [user] mfix_vars1(0, _381100)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _381100)
^  Unify: (274) [user] mfix_vars1(0, _381100)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _381100)
^  Unify: (274) [user] mfix_vars1(0, _381100)
   Call: (275) [system] 0==[_395026, _395032]
^  Redo: (274) [user] mfix_vars1(0, _381100)
^  Unify: (274) [user] mfix_vars1(0, _381100)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _381100)
^  Unify: (274) [user] mfix_vars1(0, _381100)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _381100)
^  Unify: (274) [user] mfix_vars1(0, _381100)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _381100)
^  Unify: (274) [user] mfix_vars1(0, _381100)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _381100)
   Call: (275) [system] 0=_381100
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _381102, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1309, 0], [1309, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1309, 0], [";; Converted:", 1309, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1309, 0], [";; Converted:", 1309, 0])
   Call: (270) [system] compound_name_arguments(_275274, '$COMMENT', [";; Converted:", 1309, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1309, 0), '$COMMENT', [";; Converted:", 1309, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1309, 0)\=@='$COMMENT'(";; Converted:", 1309, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1309, 0), _269688)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1309, 0), _431274))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1309, 0), _431274))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1309, 0), _431274))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1309, 0), _431274))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1309, 0), _431274)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1309, 0), _431274)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1309, 0), _436860))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1309, 0), _436860))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1309, 0), _436860)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1309, 0), _436860)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1309, 0), _436860)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1309, 0)\=@='$COMMENT'(";; Converted:", 1309, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1309, 0), _431274)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1309, 0), _264076))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1309, 0), _264076))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1309, 0), _264076))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1309, 0), _264076))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1309, 0), _264076)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1309, 0), _264076)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1309, 0), _459180))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1309, 0), _459180))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1309, 0), _459180)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1309, 0), _459180)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1309, 0), _459180)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1309, 0)\=@='$COMMENT'(";; Converted:", 1309, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1309, 0), _264076)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1309, 0)\=@='$COMMENT'(";; Converted:", 1309, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1309, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1309, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1309, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1309, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1309, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1309, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1309, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1309, 0), _487958, [], _487960)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1309, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1309, 0), _487958, [], _487960)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1309, 0), _487958, [], _487960)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1309, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1309, 0), _487958, [], _487960)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1309, 0), _487958, [], _487960)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1309, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1309, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1309, 0), _497274, _497276)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1309, 0), '$COMMENT', [";; Converted:", 1309, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1309, 0], _499160, [], _487960)
^  Unify: (258) [user] subst_vars([";; Converted:", 1309, 0], [";; Converted:", 1309, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1309, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1309, 0], _499160, [], _487960)
^  Unify: (258) [user] subst_vars([";; Converted:", 1309, 0], [_502896|_502898], [], _487960)
^  Call: (259) [user] subst_vars(";; Converted:", _502896, [], _503836)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _502896, [], _503836)
^  Unify: (259) [user] subst_vars(";; Converted:", _502896, [], _503836)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _502896, [], _503836)
^  Unify: (259) [user] subst_vars(";; Converted:", _502896, [], _503836)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _502896, [], _503836)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1309, 0], _502898, [], _487960)
^  Unify: (259) [user] subst_vars([1309, 0], [1309, 0], [], [])
   Call: (260) [system] var([1309, 0])
^  Redo: (259) [user] subst_vars([1309, 0], _502898, [], _487960)
^  Unify: (259) [user] subst_vars([1309, 0], [_518768|_518770], [], _487960)
^  Call: (260) [user] subst_vars(1309, _518768, [], _519708)
^  Unify: (260) [user] subst_vars(1309, 1309, [], [])
   Call: (261) [system] var(1309)
^  Redo: (260) [user] subst_vars(1309, _518768, [], _519708)
^  Unify: (260) [user] subst_vars(1309, _5976, [], _5980)
   Call: (261) [system] atom(1309)
^  Redo: (260) [user] subst_vars(1309, _5976, [], _5980)
^  Unify: (260) [user] subst_vars(1309, _5976, [], _5980)
   Call: (261) [system] compound(1309)
^  Redo: (260) [user] subst_vars(1309, _5976, [], _5980)
^  Unify: (260) [user] subst_vars(1309, 1309, [], [])
^  Exit: (260) [user] subst_vars(1309, 1309, [], [])
^  Call: (260) [user] subst_vars([0], _5978, [], _5940)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _5978, [], _5940)
^  Unify: (260) [user] subst_vars([0], [_16678|_16680], [], _5940)
^  Call: (261) [user] subst_vars(0, _16678, [], _17618)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _16678, [], _17618)
^  Unify: (261) [user] subst_vars(0, _16678, [], _17618)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _16678, [], _17618)
^  Unify: (261) [user] subst_vars(0, _16678, [], _17618)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _16678, [], _17618)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _16680, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _16680, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1309, 0], [1309, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1309, 0], [";; Converted:", 1309, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5938, '$COMMENT', [";; Converted:", 1309, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1309, 0), '$COMMENT', [";; Converted:", 1309, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1309, 0), '$COMMENT'(";; Converted:", 1309, 0), [], [])
   Call: (257) [system] _40036=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1309, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1309, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1309, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1309, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1309, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1309, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1309, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1309, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1309, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1316, 0, 47418, '$COMMENT'(";; Original:", 1316, 0), '$stream_position'(47418, 1316, 0, 47418)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1316, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1316, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1316, 0), _92754))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1316, 0), _92754))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1316, 0), _92754)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1316, 0), _92754)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1316, 0), _92754)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1316, 0), _92754)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1316, 0), _98366))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1316, 0), _98366))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1316, 0), _98366))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1316, 0), _98366))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1316, 0), _98366)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1316, 0), _98366)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1316, 0), _103952))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1316, 0), _103952))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1316, 0), _103952)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1316, 0), _103952)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1316, 0), _103952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1316, 0), _103952)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1316, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1316, 0), _103952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1316, 0), '$VAR'(_111412))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1316, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1316, 0), _103952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1316, 0), _103952)
   Call: (270) [system] '$COMMENT'(";; Original:", 1316, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1316, 0), _103952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1316, 0), _103952)
   Call: (270) [system] '$COMMENT'(";; Original:", 1316, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1316, 0), _103952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1316, 0), _103952)
   Call: (270) [system] '$COMMENT'(";; Original:", 1316, 0)==[_120692, _120698]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1316, 0), _103952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1316, 0), _103952)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1316, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1316, 0), _103952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1316, 0), _103952)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1316, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1316, 0), _103952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1316, 0), _103952)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1316, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1316, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1316, 0), _130894, _130896)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1316, 0), '$COMMENT', [";; Original:", 1316, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1316, 0], _134636)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1316, 0], _134636)
   Call: (271) [apply] apply:maplist_([";; Original:", 1316, 0], _134636, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1316, 0], [_137454|_137456], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _137454)
^  Unify: (272) [user] mfix_vars1(";; Original:", _137454)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _137454)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_142100))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _137454)
^  Unify: (272) [user] mfix_vars1(";; Original:", _137454)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _137454)
^  Unify: (272) [user] mfix_vars1(";; Original:", _137454)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _137454)
^  Unify: (272) [user] mfix_vars1(";; Original:", _137454)
   Call: (273) [system] ";; Original:"==[_151380, _151386]
^  Redo: (272) [user] mfix_vars1(";; Original:", _137454)
^  Unify: (272) [user] mfix_vars1(";; Original:", _137454)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _137454)
^  Unify: (272) [user] mfix_vars1(";; Original:", _137454)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _137454)
^  Unify: (272) [user] mfix_vars1(";; Original:", _137454)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _137454)
^  Unify: (272) [user] mfix_vars1(";; Original:", _137454)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _137454)
   Call: (273) [system] ";; Original:"=_137454
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1316, 0], _137456, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1316, 0], [_175452|_175454], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1316, _175452)
^  Unify: (273) [user] mfix_vars1(1316, _175452)
   Call: (274) [system] var(1316)
^  Redo: (273) [user] mfix_vars1(1316, _175452)
^  Unify: (273) [user] mfix_vars1(1316, '$VAR'(_180098))
   Call: (274) [system] atom(1316)
^  Redo: (273) [user] mfix_vars1(1316, _175452)
^  Unify: (273) [user] mfix_vars1(1316, _175452)
   Call: (274) [system] 1316==true
^  Redo: (273) [user] mfix_vars1(1316, _175452)
^  Unify: (273) [user] mfix_vars1(1316, _175452)
   Call: (274) [system] 1316==false
^  Redo: (273) [user] mfix_vars1(1316, _175452)
^  Unify: (273) [user] mfix_vars1(1316, _175452)
   Call: (274) [system] 1316==[_189378, _189384]
^  Redo: (273) [user] mfix_vars1(1316, _175452)
^  Unify: (273) [user] mfix_vars1(1316, _175452)
   Call: (274) [system] is_list(1316)
^  Redo: (273) [user] mfix_vars1(1316, _175452)
^  Unify: (273) [user] mfix_vars1(1316, _175452)
   Call: (274) [system] string(1316)
^  Redo: (273) [user] mfix_vars1(1316, _175452)
^  Unify: (273) [user] mfix_vars1(1316, _175452)
   Call: (274) [system] compound(1316)
^  Redo: (273) [user] mfix_vars1(1316, _175452)
^  Unify: (273) [user] mfix_vars1(1316, _175452)
^  Call: (274) [user] symbol(1316)
^  Unify: (274) [user] symbol(1316)
   Call: (275) [system] atom(1316)
   Fail: (275) [system] atom(1316)
^  Fail: (274) [user] symbol(1316)
^  Redo: (273) [user] mfix_vars1(1316, _175452)
   Call: (274) [system] 1316=_175452
   Exit: (274) [system] 1316=1316
^  Exit: (273) [user] mfix_vars1(1316, 1316)
   Call: (273) [apply] apply:maplist_([0], _175454, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_209778|_209780], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _209778)
^  Unify: (274) [user] mfix_vars1(0, _209778)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _209778)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_214424))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _209778)
^  Unify: (274) [user] mfix_vars1(0, _209778)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _209778)
^  Unify: (274) [user] mfix_vars1(0, _209778)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _209778)
^  Unify: (274) [user] mfix_vars1(0, _209778)
   Call: (275) [system] 0==[_223704, _223710]
^  Redo: (274) [user] mfix_vars1(0, _209778)
^  Unify: (274) [user] mfix_vars1(0, _209778)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _209778)
^  Unify: (274) [user] mfix_vars1(0, _209778)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _209778)
^  Unify: (274) [user] mfix_vars1(0, _209778)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _209778)
^  Unify: (274) [user] mfix_vars1(0, _209778)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _209778)
   Call: (275) [system] 0=_209778
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _209780, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1316, 0], [1316, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1316, 0], [";; Original:", 1316, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1316, 0], [";; Original:", 1316, 0])
   Call: (270) [system] compound_name_arguments(_103952, '$COMMENT', [";; Original:", 1316, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1316, 0), '$COMMENT', [";; Original:", 1316, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1316, 0)\=@='$COMMENT'(";; Original:", 1316, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1316, 0), _98366)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1316, 0), _259952))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1316, 0), _259952))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1316, 0), _259952))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1316, 0), _259952))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1316, 0), _259952)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1316, 0), _259952)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1316, 0), _265538))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1316, 0), _265538))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1316, 0), _265538)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1316, 0), _265538)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1316, 0), _265538)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1316, 0)\=@='$COMMENT'(";; Original:", 1316, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1316, 0), _259952)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1316, 0), _92754))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1316, 0), _92754))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1316, 0), _92754))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1316, 0), _92754))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1316, 0), _92754)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1316, 0), _92754)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1316, 0), _287858))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1316, 0), _287858))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1316, 0), _287858)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1316, 0), _287858)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1316, 0), _287858)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1316, 0)\=@='$COMMENT'(";; Original:", 1316, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1316, 0), _92754)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1316, 0)\=@='$COMMENT'(";; Original:", 1316, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1316, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1316, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1316, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1316, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1316, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1316, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1316, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1316, 0), _316636, [], _316638)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1316, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1316, 0), _316636, [], _316638)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1316, 0), _316636, [], _316638)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1316, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1316, 0), _316636, [], _316638)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1316, 0), _316636, [], _316638)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1316, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1316, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1316, 0), _325952, _325954)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1316, 0), '$COMMENT', [";; Original:", 1316, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1316, 0], _327838, [], _316638)
^  Unify: (258) [user] subst_vars([";; Original:", 1316, 0], [";; Original:", 1316, 0], [], [])
   Call: (259) [system] var([";; Original:", 1316, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1316, 0], _327838, [], _316638)
^  Unify: (258) [user] subst_vars([";; Original:", 1316, 0], [_331574|_331576], [], _316638)
^  Call: (259) [user] subst_vars(";; Original:", _331574, [], _332514)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _331574, [], _332514)
^  Unify: (259) [user] subst_vars(";; Original:", _331574, [], _332514)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _331574, [], _332514)
^  Unify: (259) [user] subst_vars(";; Original:", _331574, [], _332514)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _331574, [], _332514)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1316, 0], _331576, [], _316638)
^  Unify: (259) [user] subst_vars([1316, 0], [1316, 0], [], [])
   Call: (260) [system] var([1316, 0])
^  Redo: (259) [user] subst_vars([1316, 0], _331576, [], _316638)
^  Unify: (259) [user] subst_vars([1316, 0], [_347446|_347448], [], _316638)
^  Call: (260) [user] subst_vars(1316, _347446, [], _348386)
^  Unify: (260) [user] subst_vars(1316, 1316, [], [])
   Call: (261) [system] var(1316)
^  Redo: (260) [user] subst_vars(1316, _347446, [], _348386)
^  Unify: (260) [user] subst_vars(1316, _347446, [], _348386)
   Call: (261) [system] atom(1316)
^  Redo: (260) [user] subst_vars(1316, _347446, [], _348386)
^  Unify: (260) [user] subst_vars(1316, _347446, [], _348386)
   Call: (261) [system] compound(1316)
^  Redo: (260) [user] subst_vars(1316, _347446, [], _348386)
^  Unify: (260) [user] subst_vars(1316, 1316, [], [])
^  Exit: (260) [user] subst_vars(1316, 1316, [], [])
^  Call: (260) [user] subst_vars([0], _347448, [], _316638)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _347448, [], _316638)
^  Unify: (260) [user] subst_vars([0], [_363318|_363320], [], _316638)
^  Call: (261) [user] subst_vars(0, _363318, [], _364258)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _363318, [], _364258)
^  Unify: (261) [user] subst_vars(0, _363318, [], _364258)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _363318, [], _364258)
^  Unify: (261) [user] subst_vars(0, _363318, [], _364258)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _363318, [], _364258)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _363320, [], _316638)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _363320, [], _316638)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1316, 0], [1316, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1316, 0], [";; Original:", 1316, 0], [], [])
   Call: (258) [system] compound_name_arguments(_316636, '$COMMENT', [";; Original:", 1316, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1316, 0), '$COMMENT', [";; Original:", 1316, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1316, 0), '$COMMENT'(";; Original:", 1316, 0), [], [])
   Call: (257) [system] _386676=metta_file_buffer(+, '$COMMENT'(";; Original:", 1316, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1316, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1316, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1316, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1316, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1316, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1316, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1316, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1316, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1317, 0, 47431, '$COMMENT'(";;    #[test]", 1317, 0), '$stream_position'(47431, 1317, 0, 47431)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1317, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1317, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1317, 0), _439394))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1317, 0), _439394))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1317, 0), _439394)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1317, 0), _439394)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1317, 0), _439394)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1317, 0), _439394)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1317, 0), _445006))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1317, 0), _445006))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1317, 0), _445006))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1317, 0), _445006))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1317, 0), _445006)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1317, 0), _445006)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    #[test]", 1317, 0), _450592))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1317, 0), _450592))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    #[test]", 1317, 0), _450592)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1317, 0), _450592)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1317, 0), _450592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1317, 0), _450592)
   Call: (270) [system] var('$COMMENT'(";;    #[test]", 1317, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1317, 0), _450592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1317, 0), '$VAR'(_458052))
   Call: (270) [system] atom('$COMMENT'(";;    #[test]", 1317, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1317, 0), _450592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1317, 0), _450592)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1317, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1317, 0), _450592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1317, 0), _450592)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1317, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1317, 0), _450592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1317, 0), _450592)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1317, 0)==[_467332, _467338]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1317, 0), _450592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1317, 0), _450592)
   Call: (270) [system] is_list('$COMMENT'(";;    #[test]", 1317, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1317, 0), _450592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1317, 0), _450592)
   Call: (270) [system] string('$COMMENT'(";;    #[test]", 1317, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1317, 0), _450592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1317, 0), _450592)
   Call: (270) [system] compound('$COMMENT'(";;    #[test]", 1317, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    #[test]", 1317, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1317, 0), _477534, _477536)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT', [";;    #[test]", 1317, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    #[test]", 1317, 0], _481276)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1317, 0], _481276)
   Call: (271) [apply] apply:maplist_([";;    #[test]", 1317, 0], _481276, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    #[test]", 1317, 0], [_484094|_484096], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    #[test]", _484094)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _484094)
   Call: (273) [system] var(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _484094)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", '$VAR'(_488740))
   Call: (273) [system] atom(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _484094)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _484094)
   Call: (273) [system] ";;    #[test]"==true
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _484094)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _484094)
   Call: (273) [system] ";;    #[test]"==false
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _484094)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _484094)
   Call: (273) [system] ";;    #[test]"==[_498020, _498026]
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _484094)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _484094)
   Call: (273) [system] is_list(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _484094)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _484094)
   Call: (273) [system] string(";;    #[test]")
   Exit: (273) [system] string(";;    #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _484094)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _484094)
   Call: (273) [system] compound(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _484094)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _484094)
^  Call: (273) [user] symbol(";;    #[test]")
^  Unify: (273) [user] symbol(";;    #[test]")
   Call: (274) [system] atom(";;    #[test]")
   Fail: (274) [system] atom(";;    #[test]")
^  Fail: (273) [user] symbol(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _484094)
   Call: (273) [system] ";;    #[test]"=_484094
   Exit: (273) [system] ";;    #[test]"=";;    #[test]"
^  Exit: (272) [user] mfix_vars1(";;    #[test]", ";;    #[test]")
   Call: (272) [apply] apply:maplist_([1317, 0], _484096, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1317, 0], [_522092|_522094], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1317, _522092)
^  Unify: (273) [user] mfix_vars1(1317, _6030)
   Call: (274) [system] var(1317)
^  Redo: (273) [user] mfix_vars1(1317, _6030)
^  Unify: (273) [user] mfix_vars1(1317, '$VAR'(_8758))
   Call: (274) [system] atom(1317)
^  Redo: (273) [user] mfix_vars1(1317, _6030)
^  Unify: (273) [user] mfix_vars1(1317, _6030)
   Call: (274) [system] 1317==true
^  Redo: (273) [user] mfix_vars1(1317, _6030)
^  Unify: (273) [user] mfix_vars1(1317, _6030)
   Call: (274) [system] 1317==false
^  Redo: (273) [user] mfix_vars1(1317, _6030)
^  Unify: (273) [user] mfix_vars1(1317, _6030)
   Call: (274) [system] 1317==[_18038, _18044]
^  Redo: (273) [user] mfix_vars1(1317, _6030)
^  Unify: (273) [user] mfix_vars1(1317, _6030)
   Call: (274) [system] is_list(1317)
^  Redo: (273) [user] mfix_vars1(1317, _6030)
^  Unify: (273) [user] mfix_vars1(1317, _6030)
   Call: (274) [system] string(1317)
^  Redo: (273) [user] mfix_vars1(1317, _6030)
^  Unify: (273) [user] mfix_vars1(1317, _6030)
   Call: (274) [system] compound(1317)
^  Redo: (273) [user] mfix_vars1(1317, _6030)
^  Unify: (273) [user] mfix_vars1(1317, _6030)
^  Call: (274) [user] symbol(1317)
^  Unify: (274) [user] symbol(1317)
   Call: (275) [system] atom(1317)
   Fail: (275) [system] atom(1317)
^  Fail: (274) [user] symbol(1317)
^  Redo: (273) [user] mfix_vars1(1317, _6030)
   Call: (274) [system] 1317=_6030
   Exit: (274) [system] 1317=1317
^  Exit: (273) [user] mfix_vars1(1317, 1317)
   Call: (273) [apply] apply:maplist_([0], _6032, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_38438|_38440], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _38438)
^  Unify: (274) [user] mfix_vars1(0, _38438)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _38438)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_43084))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _38438)
^  Unify: (274) [user] mfix_vars1(0, _38438)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _38438)
^  Unify: (274) [user] mfix_vars1(0, _38438)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _38438)
^  Unify: (274) [user] mfix_vars1(0, _38438)
   Call: (275) [system] 0==[_52364, _52370]
^  Redo: (274) [user] mfix_vars1(0, _38438)
^  Unify: (274) [user] mfix_vars1(0, _38438)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _38438)
^  Unify: (274) [user] mfix_vars1(0, _38438)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _38438)
^  Unify: (274) [user] mfix_vars1(0, _38438)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _38438)
^  Unify: (274) [user] mfix_vars1(0, _38438)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _38438)
   Call: (275) [system] 0=_38438
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _38440, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1317, 0], [1317, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    #[test]", 1317, 0], [";;    #[test]", 1317, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1317, 0], [";;    #[test]", 1317, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";;    #[test]", 1317, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT', [";;    #[test]", 1317, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1317, 0)\=@='$COMMENT'(";;    #[test]", 1317, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1317, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    #[test]", 1317, 0), _88612))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1317, 0), _88612))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1317, 0), _88612))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1317, 0), _88612))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1317, 0), _88612)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1317, 0), _88612)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    #[test]", 1317, 0), _94198))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1317, 0), _94198))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    #[test]", 1317, 0), _94198)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1317, 0), _94198)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1317, 0), _94198)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1317, 0)\=@='$COMMENT'(";;    #[test]", 1317, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1317, 0), _88612)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    #[test]", 1317, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1317, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1317, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1317, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1317, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1317, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    #[test]", 1317, 0), _116518))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1317, 0), _116518))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    #[test]", 1317, 0), _116518)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1317, 0), _116518)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1317, 0), _116518)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1317, 0)\=@='$COMMENT'(";;    #[test]", 1317, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1317, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0)))
   Call: (261) [system] '$COMMENT'(";;    #[test]", 1317, 0)\=@='$COMMENT'(";;    #[test]", 1317, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1317, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1317, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1317, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1317, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1317, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1317, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1317, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1317, 0), _145296, [], _145298)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    #[test]", 1317, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1317, 0), _145296, [], _145298)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1317, 0), _145296, [], _145298)
   Call: (258) [system] atom('$COMMENT'(";;    #[test]", 1317, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1317, 0), _145296, [], _145298)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1317, 0), _145296, [], _145298)
   Call: (258) [system] compound('$COMMENT'(";;    #[test]", 1317, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    #[test]", 1317, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1317, 0), _154612, _154614)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT', [";;    #[test]", 1317, 0])
^  Call: (258) [user] subst_vars([";;    #[test]", 1317, 0], _156498, [], _145298)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1317, 0], [";;    #[test]", 1317, 0], [], [])
   Call: (259) [system] var([";;    #[test]", 1317, 0])
^  Redo: (258) [user] subst_vars([";;    #[test]", 1317, 0], _156498, [], _145298)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1317, 0], [_160234|_160236], [], _145298)
^  Call: (259) [user] subst_vars(";;    #[test]", _160234, [], _161174)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
   Call: (260) [system] var(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _160234, [], _161174)
^  Unify: (259) [user] subst_vars(";;    #[test]", _160234, [], _161174)
   Call: (260) [system] atom(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _160234, [], _161174)
^  Unify: (259) [user] subst_vars(";;    #[test]", _160234, [], _161174)
   Call: (260) [system] compound(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _160234, [], _161174)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Exit: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Call: (259) [user] subst_vars([1317, 0], _160236, [], _145298)
^  Unify: (259) [user] subst_vars([1317, 0], [1317, 0], [], [])
   Call: (260) [system] var([1317, 0])
^  Redo: (259) [user] subst_vars([1317, 0], _160236, [], _145298)
^  Unify: (259) [user] subst_vars([1317, 0], [_176106|_176108], [], _145298)
^  Call: (260) [user] subst_vars(1317, _176106, [], _177046)
^  Unify: (260) [user] subst_vars(1317, 1317, [], [])
   Call: (261) [system] var(1317)
^  Redo: (260) [user] subst_vars(1317, _176106, [], _177046)
^  Unify: (260) [user] subst_vars(1317, _176106, [], _177046)
   Call: (261) [system] atom(1317)
^  Redo: (260) [user] subst_vars(1317, _176106, [], _177046)
^  Unify: (260) [user] subst_vars(1317, _176106, [], _177046)
   Call: (261) [system] compound(1317)
^  Redo: (260) [user] subst_vars(1317, _176106, [], _177046)
^  Unify: (260) [user] subst_vars(1317, 1317, [], [])
^  Exit: (260) [user] subst_vars(1317, 1317, [], [])
^  Call: (260) [user] subst_vars([0], _176108, [], _145298)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _176108, [], _145298)
^  Unify: (260) [user] subst_vars([0], [_191978|_191980], [], _145298)
^  Call: (261) [user] subst_vars(0, _191978, [], _192918)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _191978, [], _192918)
^  Unify: (261) [user] subst_vars(0, _191978, [], _192918)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _191978, [], _192918)
^  Unify: (261) [user] subst_vars(0, _191978, [], _192918)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _191978, [], _192918)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _191980, [], _145298)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _191980, [], _145298)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1317, 0], [1317, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    #[test]", 1317, 0], [";;    #[test]", 1317, 0], [], [])
   Call: (258) [system] compound_name_arguments(_145296, '$COMMENT', [";;    #[test]", 1317, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT', [";;    #[test]", 1317, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1317, 0), '$COMMENT'(";;    #[test]", 1317, 0), [], [])
   Call: (257) [system] _215336=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1317, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1317, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1317, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1317, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1317, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1317, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1317, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1317, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1317, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1318, 0, 47445, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$stream_position'(47445, 1318, 0, 47445)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _268062))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _268062))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _268062)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _268062)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _268062)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _268062)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _273674))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _273674))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _273674))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _273674))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _273674)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _273674)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _279260))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _279260))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _279260)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _279260)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _279260)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _279260)
   Call: (270) [system] var('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _279260)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$VAR'(_286720))
   Call: (270) [system] atom('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _279260)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _279260)
   Call: (270) [system] '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _279260)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _279260)
   Call: (270) [system] '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _279260)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _279260)
   Call: (270) [system] '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0)==[_296000, _296006]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _279260)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _279260)
   Call: (270) [system] is_list('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _279260)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _279260)
   Call: (270) [system] string('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _279260)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _279260)
   Call: (270) [system] compound('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _306202, _306204)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT', [";;    fn let_op_variables_visibility_pr262() {", 1318, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    fn let_op_variables_visibility_pr262() {", 1318, 0], _309944)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn let_op_variables_visibility_pr262() {", 1318, 0], _309944)
   Call: (271) [apply] apply:maplist_([";;    fn let_op_variables_visibility_pr262() {", 1318, 0], _309944, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    fn let_op_variables_visibility_pr262() {", 1318, 0], [_312762|_312764], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    fn let_op_variables_visibility_pr262() {", _312762)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_variables_visibility_pr262() {", _312762)
   Call: (273) [system] var(";;    fn let_op_variables_visibility_pr262() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_variables_visibility_pr262() {", _312762)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_variables_visibility_pr262() {", '$VAR'(_317408))
   Call: (273) [system] atom(";;    fn let_op_variables_visibility_pr262() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_variables_visibility_pr262() {", _312762)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_variables_visibility_pr262() {", _312762)
   Call: (273) [system] ";;    fn let_op_variables_visibility_pr262() {"==true
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_variables_visibility_pr262() {", _312762)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_variables_visibility_pr262() {", _312762)
   Call: (273) [system] ";;    fn let_op_variables_visibility_pr262() {"==false
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_variables_visibility_pr262() {", _312762)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_variables_visibility_pr262() {", _312762)
   Call: (273) [system] ";;    fn let_op_variables_visibility_pr262() {"==[_326688, _326694]
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_variables_visibility_pr262() {", _312762)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_variables_visibility_pr262() {", _312762)
   Call: (273) [system] is_list(";;    fn let_op_variables_visibility_pr262() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_variables_visibility_pr262() {", _312762)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_variables_visibility_pr262() {", _312762)
   Call: (273) [system] string(";;    fn let_op_variables_visibility_pr262() {")
   Exit: (273) [system] string(";;    fn let_op_variables_visibility_pr262() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_variables_visibility_pr262() {", _312762)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_variables_visibility_pr262() {", _312762)
   Call: (273) [system] compound(";;    fn let_op_variables_visibility_pr262() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_variables_visibility_pr262() {", _312762)
^  Unify: (272) [user] mfix_vars1(";;    fn let_op_variables_visibility_pr262() {", _312762)
^  Call: (273) [user] symbol(";;    fn let_op_variables_visibility_pr262() {")
^  Unify: (273) [user] symbol(";;    fn let_op_variables_visibility_pr262() {")
   Call: (274) [system] atom(";;    fn let_op_variables_visibility_pr262() {")
   Fail: (274) [system] atom(";;    fn let_op_variables_visibility_pr262() {")
^  Fail: (273) [user] symbol(";;    fn let_op_variables_visibility_pr262() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_op_variables_visibility_pr262() {", _312762)
   Call: (273) [system] ";;    fn let_op_variables_visibility_pr262() {"=_312762
   Exit: (273) [system] ";;    fn let_op_variables_visibility_pr262() {"=";;    fn let_op_variables_visibility_pr262() {"
^  Exit: (272) [user] mfix_vars1(";;    fn let_op_variables_visibility_pr262() {", ";;    fn let_op_variables_visibility_pr262() {")
   Call: (272) [apply] apply:maplist_([1318, 0], _312764, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1318, 0], [_350760|_350762], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1318, _350760)
^  Unify: (273) [user] mfix_vars1(1318, _350760)
   Call: (274) [system] var(1318)
^  Redo: (273) [user] mfix_vars1(1318, _350760)
^  Unify: (273) [user] mfix_vars1(1318, '$VAR'(_355406))
   Call: (274) [system] atom(1318)
^  Redo: (273) [user] mfix_vars1(1318, _350760)
^  Unify: (273) [user] mfix_vars1(1318, _350760)
   Call: (274) [system] 1318==true
^  Redo: (273) [user] mfix_vars1(1318, _350760)
^  Unify: (273) [user] mfix_vars1(1318, _350760)
   Call: (274) [system] 1318==false
^  Redo: (273) [user] mfix_vars1(1318, _350760)
^  Unify: (273) [user] mfix_vars1(1318, _350760)
   Call: (274) [system] 1318==[_364686, _364692]
^  Redo: (273) [user] mfix_vars1(1318, _350760)
^  Unify: (273) [user] mfix_vars1(1318, _350760)
   Call: (274) [system] is_list(1318)
^  Redo: (273) [user] mfix_vars1(1318, _350760)
^  Unify: (273) [user] mfix_vars1(1318, _350760)
   Call: (274) [system] string(1318)
^  Redo: (273) [user] mfix_vars1(1318, _350760)
^  Unify: (273) [user] mfix_vars1(1318, _350760)
   Call: (274) [system] compound(1318)
^  Redo: (273) [user] mfix_vars1(1318, _350760)
^  Unify: (273) [user] mfix_vars1(1318, _350760)
^  Call: (274) [user] symbol(1318)
^  Unify: (274) [user] symbol(1318)
   Call: (275) [system] atom(1318)
   Fail: (275) [system] atom(1318)
^  Fail: (274) [user] symbol(1318)
^  Redo: (273) [user] mfix_vars1(1318, _350760)
   Call: (274) [system] 1318=_350760
   Exit: (274) [system] 1318=1318
^  Exit: (273) [user] mfix_vars1(1318, 1318)
   Call: (273) [apply] apply:maplist_([0], _350762, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_385086|_385088], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _385086)
^  Unify: (274) [user] mfix_vars1(0, _385086)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _385086)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_389732))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _385086)
^  Unify: (274) [user] mfix_vars1(0, _385086)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _385086)
^  Unify: (274) [user] mfix_vars1(0, _385086)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _385086)
^  Unify: (274) [user] mfix_vars1(0, _385086)
   Call: (275) [system] 0==[_399012, _399018]
^  Redo: (274) [user] mfix_vars1(0, _385086)
^  Unify: (274) [user] mfix_vars1(0, _385086)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _385086)
^  Unify: (274) [user] mfix_vars1(0, _385086)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _385086)
^  Unify: (274) [user] mfix_vars1(0, _385086)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _385086)
^  Unify: (274) [user] mfix_vars1(0, _385086)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _385086)
   Call: (275) [system] 0=_385086
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _385088, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1318, 0], [1318, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    fn let_op_variables_visibility_pr262() {", 1318, 0], [";;    fn let_op_variables_visibility_pr262() {", 1318, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn let_op_variables_visibility_pr262() {", 1318, 0], [";;    fn let_op_variables_visibility_pr262() {", 1318, 0])
   Call: (270) [system] compound_name_arguments(_279260, '$COMMENT', [";;    fn let_op_variables_visibility_pr262() {", 1318, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT', [";;    fn let_op_variables_visibility_pr262() {", 1318, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0)\=@='$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _273674)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _435260))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _435260))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _435260))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _435260))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _435260)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _435260)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _440846))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _440846))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _440846)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _440846)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _440846)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0)\=@='$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _435260)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _268062))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _268062))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _268062))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _268062))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _268062)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _268062)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _463166))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _463166))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _463166)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _463166)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _463166)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0)\=@='$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _268062)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0)))
   Call: (261) [system] '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0)\=@='$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _491944, [], _491946)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _491944, [], _491946)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _491944, [], _491946)
   Call: (258) [system] atom('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _491944, [], _491946)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _491944, [], _491946)
   Call: (258) [system] compound('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), _501260, _501262)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT', [";;    fn let_op_variables_visibility_pr262() {", 1318, 0])
^  Call: (258) [user] subst_vars([";;    fn let_op_variables_visibility_pr262() {", 1318, 0], _503146, [], _491946)
^  Unify: (258) [user] subst_vars([";;    fn let_op_variables_visibility_pr262() {", 1318, 0], [";;    fn let_op_variables_visibility_pr262() {", 1318, 0], [], [])
   Call: (259) [system] var([";;    fn let_op_variables_visibility_pr262() {", 1318, 0])
^  Redo: (258) [user] subst_vars([";;    fn let_op_variables_visibility_pr262() {", 1318, 0], _503146, [], _491946)
^  Unify: (258) [user] subst_vars([";;    fn let_op_variables_visibility_pr262() {", 1318, 0], [_506882|_506884], [], _491946)
^  Call: (259) [user] subst_vars(";;    fn let_op_variables_visibility_pr262() {", _506882, [], _507822)
^  Unify: (259) [user] subst_vars(";;    fn let_op_variables_visibility_pr262() {", ";;    fn let_op_variables_visibility_pr262() {", [], [])
   Call: (260) [system] var(";;    fn let_op_variables_visibility_pr262() {")
^  Redo: (259) [user] subst_vars(";;    fn let_op_variables_visibility_pr262() {", _506882, [], _507822)
^  Unify: (259) [user] subst_vars(";;    fn let_op_variables_visibility_pr262() {", _506882, [], _507822)
   Call: (260) [system] atom(";;    fn let_op_variables_visibility_pr262() {")
^  Redo: (259) [user] subst_vars(";;    fn let_op_variables_visibility_pr262() {", _506882, [], _507822)
^  Unify: (259) [user] subst_vars(";;    fn let_op_variables_visibility_pr262() {", _506882, [], _507822)
   Call: (260) [system] compound(";;    fn let_op_variables_visibility_pr262() {")
^  Redo: (259) [user] subst_vars(";;    fn let_op_variables_visibility_pr262() {", _506882, [], _507822)
^  Unify: (259) [user] subst_vars(";;    fn let_op_variables_visibility_pr262() {", ";;    fn let_op_variables_visibility_pr262() {", [], [])
^  Exit: (259) [user] subst_vars(";;    fn let_op_variables_visibility_pr262() {", ";;    fn let_op_variables_visibility_pr262() {", [], [])
^  Call: (259) [user] subst_vars([1318, 0], _506884, [], _491946)
^  Unify: (259) [user] subst_vars([1318, 0], [1318, 0], [], [])
   Call: (260) [system] var([1318, 0])
^  Redo: (259) [user] subst_vars([1318, 0], _506884, [], _491946)
^  Unify: (259) [user] subst_vars([1318, 0], [_522754|_522756], [], _491946)
^  Call: (260) [user] subst_vars(1318, _5984, [], _5990)
^  Unify: (260) [user] subst_vars(1318, 1318, [], [])
   Call: (261) [system] var(1318)
^  Redo: (260) [user] subst_vars(1318, _5984, [], _5990)
^  Unify: (260) [user] subst_vars(1318, _5984, [], _5990)
   Call: (261) [system] atom(1318)
^  Redo: (260) [user] subst_vars(1318, _5984, [], _5990)
^  Unify: (260) [user] subst_vars(1318, _5984, [], _5990)
   Call: (261) [system] compound(1318)
^  Redo: (260) [user] subst_vars(1318, _5984, [], _5990)
^  Unify: (260) [user] subst_vars(1318, 1318, [], [])
^  Exit: (260) [user] subst_vars(1318, 1318, [], [])
^  Call: (260) [user] subst_vars([0], _5986, [], _5948)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _5986, [], _5948)
^  Unify: (260) [user] subst_vars([0], [_20696|_20698], [], _5948)
^  Call: (261) [user] subst_vars(0, _20696, [], _21636)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _20696, [], _21636)
^  Unify: (261) [user] subst_vars(0, _20696, [], _21636)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _20696, [], _21636)
^  Unify: (261) [user] subst_vars(0, _20696, [], _21636)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _20696, [], _21636)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _20698, [], _5948)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _20698, [], _5948)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1318, 0], [1318, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    fn let_op_variables_visibility_pr262() {", 1318, 0], [";;    fn let_op_variables_visibility_pr262() {", 1318, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5946, '$COMMENT', [";;    fn let_op_variables_visibility_pr262() {", 1318, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT', [";;    fn let_op_variables_visibility_pr262() {", 1318, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), [], [])
   Call: (257) [system] _44054=metta_file_buffer(+, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_op_variables_visibility_pr262() {", 1318, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1319, 0, 47492, '$COMMENT'(";;        let program = \"", 1319, 0), '$stream_position'(47492, 1319, 0, 47492)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let program = \"", 1319, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let program = \"", 1319, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        let program = \"", 1319, 0), _96776))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let program = \"", 1319, 0), _96776))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        let program = \"", 1319, 0), _96776)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let program = \"", 1319, 0), _96776)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        let program = \"", 1319, 0), _96776)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        let program = \"", 1319, 0), _96776)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        let program = \"", 1319, 0), _102388))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let program = \"", 1319, 0), _102388))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        let program = \"", 1319, 0), _102388))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let program = \"", 1319, 0), _102388))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let program = \"", 1319, 0), _102388)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let program = \"", 1319, 0), _102388)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        let program = \"", 1319, 0), _107974))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let program = \"", 1319, 0), _107974))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        let program = \"", 1319, 0), _107974)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let program = \"", 1319, 0), _107974)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        let program = \"", 1319, 0), _107974)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let program = \"", 1319, 0), _107974)
   Call: (270) [system] var('$COMMENT'(";;        let program = \"", 1319, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let program = \"", 1319, 0), _107974)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let program = \"", 1319, 0), '$VAR'(_115434))
   Call: (270) [system] atom('$COMMENT'(";;        let program = \"", 1319, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let program = \"", 1319, 0), _107974)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let program = \"", 1319, 0), _107974)
   Call: (270) [system] '$COMMENT'(";;        let program = \"", 1319, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let program = \"", 1319, 0), _107974)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let program = \"", 1319, 0), _107974)
   Call: (270) [system] '$COMMENT'(";;        let program = \"", 1319, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let program = \"", 1319, 0), _107974)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let program = \"", 1319, 0), _107974)
   Call: (270) [system] '$COMMENT'(";;        let program = \"", 1319, 0)==[_124714, _124720]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let program = \"", 1319, 0), _107974)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let program = \"", 1319, 0), _107974)
   Call: (270) [system] is_list('$COMMENT'(";;        let program = \"", 1319, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let program = \"", 1319, 0), _107974)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let program = \"", 1319, 0), _107974)
   Call: (270) [system] string('$COMMENT'(";;        let program = \"", 1319, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let program = \"", 1319, 0), _107974)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let program = \"", 1319, 0), _107974)
   Call: (270) [system] compound('$COMMENT'(";;        let program = \"", 1319, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        let program = \"", 1319, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        let program = \"", 1319, 0), _134916, _134918)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT', [";;        let program = \"", 1319, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        let program = \"", 1319, 0], _138658)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let program = \"", 1319, 0], _138658)
   Call: (271) [apply] apply:maplist_([";;        let program = \"", 1319, 0], _138658, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        let program = \"", 1319, 0], [_141476|_141478], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        let program = \"", _141476)
^  Unify: (272) [user] mfix_vars1(";;        let program = \"", _141476)
   Call: (273) [system] var(";;        let program = \"")
^  Redo: (272) [user] mfix_vars1(";;        let program = \"", _141476)
^  Unify: (272) [user] mfix_vars1(";;        let program = \"", '$VAR'(_146122))
   Call: (273) [system] atom(";;        let program = \"")
^  Redo: (272) [user] mfix_vars1(";;        let program = \"", _141476)
^  Unify: (272) [user] mfix_vars1(";;        let program = \"", _141476)
   Call: (273) [system] ";;        let program = \""==true
^  Redo: (272) [user] mfix_vars1(";;        let program = \"", _141476)
^  Unify: (272) [user] mfix_vars1(";;        let program = \"", _141476)
   Call: (273) [system] ";;        let program = \""==false
^  Redo: (272) [user] mfix_vars1(";;        let program = \"", _141476)
^  Unify: (272) [user] mfix_vars1(";;        let program = \"", _141476)
   Call: (273) [system] ";;        let program = \""==[_155402, _155408]
^  Redo: (272) [user] mfix_vars1(";;        let program = \"", _141476)
^  Unify: (272) [user] mfix_vars1(";;        let program = \"", _141476)
   Call: (273) [system] is_list(";;        let program = \"")
^  Redo: (272) [user] mfix_vars1(";;        let program = \"", _141476)
^  Unify: (272) [user] mfix_vars1(";;        let program = \"", _141476)
   Call: (273) [system] string(";;        let program = \"")
   Exit: (273) [system] string(";;        let program = \"")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        let program = \"", _141476)
^  Unify: (272) [user] mfix_vars1(";;        let program = \"", _141476)
   Call: (273) [system] compound(";;        let program = \"")
^  Redo: (272) [user] mfix_vars1(";;        let program = \"", _141476)
^  Unify: (272) [user] mfix_vars1(";;        let program = \"", _141476)
^  Call: (273) [user] symbol(";;        let program = \"")
^  Unify: (273) [user] symbol(";;        let program = \"")
   Call: (274) [system] atom(";;        let program = \"")
   Fail: (274) [system] atom(";;        let program = \"")
^  Fail: (273) [user] symbol(";;        let program = \"")
^  Redo: (272) [user] mfix_vars1(";;        let program = \"", _141476)
   Call: (273) [system] ";;        let program = \""=_141476
   Exit: (273) [system] ";;        let program = \""=";;        let program = \""
^  Exit: (272) [user] mfix_vars1(";;        let program = \"", ";;        let program = \"")
   Call: (272) [apply] apply:maplist_([1319, 0], _141478, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1319, 0], [_179474|_179476], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1319, _179474)
^  Unify: (273) [user] mfix_vars1(1319, _179474)
   Call: (274) [system] var(1319)
^  Redo: (273) [user] mfix_vars1(1319, _179474)
^  Unify: (273) [user] mfix_vars1(1319, '$VAR'(_184120))
   Call: (274) [system] atom(1319)
^  Redo: (273) [user] mfix_vars1(1319, _179474)
^  Unify: (273) [user] mfix_vars1(1319, _179474)
   Call: (274) [system] 1319==true
^  Redo: (273) [user] mfix_vars1(1319, _179474)
^  Unify: (273) [user] mfix_vars1(1319, _179474)
   Call: (274) [system] 1319==false
^  Redo: (273) [user] mfix_vars1(1319, _179474)
^  Unify: (273) [user] mfix_vars1(1319, _179474)
   Call: (274) [system] 1319==[_193400, _193406]
^  Redo: (273) [user] mfix_vars1(1319, _179474)
^  Unify: (273) [user] mfix_vars1(1319, _179474)
   Call: (274) [system] is_list(1319)
^  Redo: (273) [user] mfix_vars1(1319, _179474)
^  Unify: (273) [user] mfix_vars1(1319, _179474)
   Call: (274) [system] string(1319)
^  Redo: (273) [user] mfix_vars1(1319, _179474)
^  Unify: (273) [user] mfix_vars1(1319, _179474)
   Call: (274) [system] compound(1319)
^  Redo: (273) [user] mfix_vars1(1319, _179474)
^  Unify: (273) [user] mfix_vars1(1319, _179474)
^  Call: (274) [user] symbol(1319)
^  Unify: (274) [user] symbol(1319)
   Call: (275) [system] atom(1319)
   Fail: (275) [system] atom(1319)
^  Fail: (274) [user] symbol(1319)
^  Redo: (273) [user] mfix_vars1(1319, _179474)
   Call: (274) [system] 1319=_179474
   Exit: (274) [system] 1319=1319
^  Exit: (273) [user] mfix_vars1(1319, 1319)
   Call: (273) [apply] apply:maplist_([0], _179476, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_213800|_213802], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _213800)
^  Unify: (274) [user] mfix_vars1(0, _213800)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _213800)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_218446))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _213800)
^  Unify: (274) [user] mfix_vars1(0, _213800)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _213800)
^  Unify: (274) [user] mfix_vars1(0, _213800)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _213800)
^  Unify: (274) [user] mfix_vars1(0, _213800)
   Call: (275) [system] 0==[_227726, _227732]
^  Redo: (274) [user] mfix_vars1(0, _213800)
^  Unify: (274) [user] mfix_vars1(0, _213800)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _213800)
^  Unify: (274) [user] mfix_vars1(0, _213800)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _213800)
^  Unify: (274) [user] mfix_vars1(0, _213800)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _213800)
^  Unify: (274) [user] mfix_vars1(0, _213800)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _213800)
   Call: (275) [system] 0=_213800
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _213802, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1319, 0], [1319, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        let program = \"", 1319, 0], [";;        let program = \"", 1319, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let program = \"", 1319, 0], [";;        let program = \"", 1319, 0])
   Call: (270) [system] compound_name_arguments(_107974, '$COMMENT', [";;        let program = \"", 1319, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT', [";;        let program = \"", 1319, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0)))
   Call: (267) [system] '$COMMENT'(";;        let program = \"", 1319, 0)\=@='$COMMENT'(";;        let program = \"", 1319, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let program = \"", 1319, 0), _102388)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        let program = \"", 1319, 0), _263974))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let program = \"", 1319, 0), _263974))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        let program = \"", 1319, 0), _263974))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let program = \"", 1319, 0), _263974))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let program = \"", 1319, 0), _263974)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let program = \"", 1319, 0), _263974)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        let program = \"", 1319, 0), _269560))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let program = \"", 1319, 0), _269560))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        let program = \"", 1319, 0), _269560)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let program = \"", 1319, 0), _269560)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        let program = \"", 1319, 0), _269560)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0)))
   Call: (267) [system] '$COMMENT'(";;        let program = \"", 1319, 0)\=@='$COMMENT'(";;        let program = \"", 1319, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let program = \"", 1319, 0), _263974)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        let program = \"", 1319, 0), _96776))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let program = \"", 1319, 0), _96776))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        let program = \"", 1319, 0), _96776))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let program = \"", 1319, 0), _96776))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let program = \"", 1319, 0), _96776)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let program = \"", 1319, 0), _96776)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        let program = \"", 1319, 0), _291880))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let program = \"", 1319, 0), _291880))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        let program = \"", 1319, 0), _291880)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let program = \"", 1319, 0), _291880)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        let program = \"", 1319, 0), _291880)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0)))
   Call: (267) [system] '$COMMENT'(";;        let program = \"", 1319, 0)\=@='$COMMENT'(";;        let program = \"", 1319, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let program = \"", 1319, 0), _96776)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0)))
   Call: (261) [system] '$COMMENT'(";;        let program = \"", 1319, 0)\=@='$COMMENT'(";;        let program = \"", 1319, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let program = \"", 1319, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let program = \"", 1319, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let program = \"", 1319, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let program = \"", 1319, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let program = \"", 1319, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        let program = \"", 1319, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        let program = \"", 1319, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        let program = \"", 1319, 0), _320658, [], _320660)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        let program = \"", 1319, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let program = \"", 1319, 0), _320658, [], _320660)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let program = \"", 1319, 0), _320658, [], _320660)
   Call: (258) [system] atom('$COMMENT'(";;        let program = \"", 1319, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let program = \"", 1319, 0), _320658, [], _320660)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let program = \"", 1319, 0), _320658, [], _320660)
   Call: (258) [system] compound('$COMMENT'(";;        let program = \"", 1319, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        let program = \"", 1319, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        let program = \"", 1319, 0), _329974, _329976)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT', [";;        let program = \"", 1319, 0])
^  Call: (258) [user] subst_vars([";;        let program = \"", 1319, 0], _331860, [], _320660)
^  Unify: (258) [user] subst_vars([";;        let program = \"", 1319, 0], [";;        let program = \"", 1319, 0], [], [])
   Call: (259) [system] var([";;        let program = \"", 1319, 0])
^  Redo: (258) [user] subst_vars([";;        let program = \"", 1319, 0], _331860, [], _320660)
^  Unify: (258) [user] subst_vars([";;        let program = \"", 1319, 0], [_335596|_335598], [], _320660)
^  Call: (259) [user] subst_vars(";;        let program = \"", _335596, [], _336536)
^  Unify: (259) [user] subst_vars(";;        let program = \"", ";;        let program = \"", [], [])
   Call: (260) [system] var(";;        let program = \"")
^  Redo: (259) [user] subst_vars(";;        let program = \"", _335596, [], _336536)
^  Unify: (259) [user] subst_vars(";;        let program = \"", _335596, [], _336536)
   Call: (260) [system] atom(";;        let program = \"")
^  Redo: (259) [user] subst_vars(";;        let program = \"", _335596, [], _336536)
^  Unify: (259) [user] subst_vars(";;        let program = \"", _335596, [], _336536)
   Call: (260) [system] compound(";;        let program = \"")
^  Redo: (259) [user] subst_vars(";;        let program = \"", _335596, [], _336536)
^  Unify: (259) [user] subst_vars(";;        let program = \"", ";;        let program = \"", [], [])
^  Exit: (259) [user] subst_vars(";;        let program = \"", ";;        let program = \"", [], [])
^  Call: (259) [user] subst_vars([1319, 0], _335598, [], _320660)
^  Unify: (259) [user] subst_vars([1319, 0], [1319, 0], [], [])
   Call: (260) [system] var([1319, 0])
^  Redo: (259) [user] subst_vars([1319, 0], _335598, [], _320660)
^  Unify: (259) [user] subst_vars([1319, 0], [_351468|_351470], [], _320660)
^  Call: (260) [user] subst_vars(1319, _351468, [], _352408)
^  Unify: (260) [user] subst_vars(1319, 1319, [], [])
   Call: (261) [system] var(1319)
^  Redo: (260) [user] subst_vars(1319, _351468, [], _352408)
^  Unify: (260) [user] subst_vars(1319, _351468, [], _352408)
   Call: (261) [system] atom(1319)
^  Redo: (260) [user] subst_vars(1319, _351468, [], _352408)
^  Unify: (260) [user] subst_vars(1319, _351468, [], _352408)
   Call: (261) [system] compound(1319)
^  Redo: (260) [user] subst_vars(1319, _351468, [], _352408)
^  Unify: (260) [user] subst_vars(1319, 1319, [], [])
^  Exit: (260) [user] subst_vars(1319, 1319, [], [])
^  Call: (260) [user] subst_vars([0], _351470, [], _320660)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _351470, [], _320660)
^  Unify: (260) [user] subst_vars([0], [_367340|_367342], [], _320660)
^  Call: (261) [user] subst_vars(0, _367340, [], _368280)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _367340, [], _368280)
^  Unify: (261) [user] subst_vars(0, _367340, [], _368280)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _367340, [], _368280)
^  Unify: (261) [user] subst_vars(0, _367340, [], _368280)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _367340, [], _368280)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _367342, [], _320660)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _367342, [], _320660)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1319, 0], [1319, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        let program = \"", 1319, 0], [";;        let program = \"", 1319, 0], [], [])
   Call: (258) [system] compound_name_arguments(_320658, '$COMMENT', [";;        let program = \"", 1319, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT', [";;        let program = \"", 1319, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        let program = \"", 1319, 0), '$COMMENT'(";;        let program = \"", 1319, 0), [], [])
   Call: (257) [system] _390698=metta_file_buffer(+, '$COMMENT'(";;        let program = \"", 1319, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        let program = \"", 1319, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        let program = \"", 1319, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let program = \"", 1319, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let program = \"", 1319, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let program = \"", 1319, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let program = \"", 1319, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let program = \"", 1319, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let program = \"", 1319, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1320, 0, 47518, '$COMMENT'(";;            ;; Knowledge", 1320, 0), '$stream_position'(47518, 1320, 0, 47518)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _443420))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _443420))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _443420)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _443420)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            ;; Knowledge", 1320, 0), _443420)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            ;; Knowledge", 1320, 0), _443420)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _449032))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _449032))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _449032))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _449032))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _449032)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _449032)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _454618))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _454618))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _454618)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _454618)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Knowledge", 1320, 0), _454618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Knowledge", 1320, 0), _454618)
   Call: (270) [system] var('$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Knowledge", 1320, 0), _454618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Knowledge", 1320, 0), '$VAR'(_462078))
   Call: (270) [system] atom('$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Knowledge", 1320, 0), _454618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Knowledge", 1320, 0), _454618)
   Call: (270) [system] '$COMMENT'(";;            ;; Knowledge", 1320, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Knowledge", 1320, 0), _454618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Knowledge", 1320, 0), _454618)
   Call: (270) [system] '$COMMENT'(";;            ;; Knowledge", 1320, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Knowledge", 1320, 0), _454618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Knowledge", 1320, 0), _454618)
   Call: (270) [system] '$COMMENT'(";;            ;; Knowledge", 1320, 0)==[_471358, _471364]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Knowledge", 1320, 0), _454618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Knowledge", 1320, 0), _454618)
   Call: (270) [system] is_list('$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Knowledge", 1320, 0), _454618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Knowledge", 1320, 0), _454618)
   Call: (270) [system] string('$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Knowledge", 1320, 0), _454618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Knowledge", 1320, 0), _454618)
   Call: (270) [system] compound('$COMMENT'(";;            ;; Knowledge", 1320, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            ;; Knowledge", 1320, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            ;; Knowledge", 1320, 0), _481560, _481562)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT', [";;            ;; Knowledge", 1320, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            ;; Knowledge", 1320, 0], _485302)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            ;; Knowledge", 1320, 0], _485302)
   Call: (271) [apply] apply:maplist_([";;            ;; Knowledge", 1320, 0], _485302, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            ;; Knowledge", 1320, 0], [_488120|_488122], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            ;; Knowledge", _488120)
^  Unify: (272) [user] mfix_vars1(";;            ;; Knowledge", _488120)
   Call: (273) [system] var(";;            ;; Knowledge")
^  Redo: (272) [user] mfix_vars1(";;            ;; Knowledge", _488120)
^  Unify: (272) [user] mfix_vars1(";;            ;; Knowledge", '$VAR'(_492766))
   Call: (273) [system] atom(";;            ;; Knowledge")
^  Redo: (272) [user] mfix_vars1(";;            ;; Knowledge", _488120)
^  Unify: (272) [user] mfix_vars1(";;            ;; Knowledge", _488120)
   Call: (273) [system] ";;            ;; Knowledge"==true
^  Redo: (272) [user] mfix_vars1(";;            ;; Knowledge", _488120)
^  Unify: (272) [user] mfix_vars1(";;            ;; Knowledge", _488120)
   Call: (273) [system] ";;            ;; Knowledge"==false
^  Redo: (272) [user] mfix_vars1(";;            ;; Knowledge", _488120)
^  Unify: (272) [user] mfix_vars1(";;            ;; Knowledge", _488120)
   Call: (273) [system] ";;            ;; Knowledge"==[_502046, _502052]
^  Redo: (272) [user] mfix_vars1(";;            ;; Knowledge", _488120)
^  Unify: (272) [user] mfix_vars1(";;            ;; Knowledge", _488120)
   Call: (273) [system] is_list(";;            ;; Knowledge")
^  Redo: (272) [user] mfix_vars1(";;            ;; Knowledge", _488120)
^  Unify: (272) [user] mfix_vars1(";;            ;; Knowledge", _488120)
   Call: (273) [system] string(";;            ;; Knowledge")
   Exit: (273) [system] string(";;            ;; Knowledge")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            ;; Knowledge", _488120)
^  Unify: (272) [user] mfix_vars1(";;            ;; Knowledge", _488120)
   Call: (273) [system] compound(";;            ;; Knowledge")
^  Redo: (272) [user] mfix_vars1(";;            ;; Knowledge", _488120)
^  Unify: (272) [user] mfix_vars1(";;            ;; Knowledge", _488120)
^  Call: (273) [user] symbol(";;            ;; Knowledge")
^  Unify: (273) [user] symbol(";;            ;; Knowledge")
   Call: (274) [system] atom(";;            ;; Knowledge")
   Fail: (274) [system] atom(";;            ;; Knowledge")
^  Fail: (273) [user] symbol(";;            ;; Knowledge")
^  Redo: (272) [user] mfix_vars1(";;            ;; Knowledge", _488120)
   Call: (273) [system] ";;            ;; Knowledge"=_488120
   Exit: (273) [system] ";;            ;; Knowledge"=";;            ;; Knowledge"
^  Exit: (272) [user] mfix_vars1(";;            ;; Knowledge", ";;            ;; Knowledge")
   Call: (272) [apply] apply:maplist_([1320, 0], _6030, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1320, 0], [_8246|_8248], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1320, _8246)
^  Unify: (273) [user] mfix_vars1(1320, _8246)
   Call: (274) [system] var(1320)
^  Redo: (273) [user] mfix_vars1(1320, _8246)
^  Unify: (273) [user] mfix_vars1(1320, '$VAR'(_12892))
   Call: (274) [system] atom(1320)
^  Redo: (273) [user] mfix_vars1(1320, _8246)
^  Unify: (273) [user] mfix_vars1(1320, _8246)
   Call: (274) [system] 1320==true
^  Redo: (273) [user] mfix_vars1(1320, _8246)
^  Unify: (273) [user] mfix_vars1(1320, _8246)
   Call: (274) [system] 1320==false
^  Redo: (273) [user] mfix_vars1(1320, _8246)
^  Unify: (273) [user] mfix_vars1(1320, _8246)
   Call: (274) [system] 1320==[_22172, _22178]
^  Redo: (273) [user] mfix_vars1(1320, _8246)
^  Unify: (273) [user] mfix_vars1(1320, _8246)
   Call: (274) [system] is_list(1320)
^  Redo: (273) [user] mfix_vars1(1320, _8246)
^  Unify: (273) [user] mfix_vars1(1320, _8246)
   Call: (274) [system] string(1320)
^  Redo: (273) [user] mfix_vars1(1320, _8246)
^  Unify: (273) [user] mfix_vars1(1320, _8246)
   Call: (274) [system] compound(1320)
^  Redo: (273) [user] mfix_vars1(1320, _8246)
^  Unify: (273) [user] mfix_vars1(1320, _8246)
^  Call: (274) [user] symbol(1320)
^  Unify: (274) [user] symbol(1320)
   Call: (275) [system] atom(1320)
   Fail: (275) [system] atom(1320)
^  Fail: (274) [user] symbol(1320)
^  Redo: (273) [user] mfix_vars1(1320, _8246)
   Call: (274) [system] 1320=_8246
   Exit: (274) [system] 1320=1320
^  Exit: (273) [user] mfix_vars1(1320, 1320)
   Call: (273) [apply] apply:maplist_([0], _8248, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_42572|_42574], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _42572)
^  Unify: (274) [user] mfix_vars1(0, _42572)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _42572)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_47218))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _42572)
^  Unify: (274) [user] mfix_vars1(0, _42572)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _42572)
^  Unify: (274) [user] mfix_vars1(0, _42572)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _42572)
^  Unify: (274) [user] mfix_vars1(0, _42572)
   Call: (275) [system] 0==[_56498, _56504]
^  Redo: (274) [user] mfix_vars1(0, _42572)
^  Unify: (274) [user] mfix_vars1(0, _42572)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _42572)
^  Unify: (274) [user] mfix_vars1(0, _42572)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _42572)
^  Unify: (274) [user] mfix_vars1(0, _42572)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _42572)
^  Unify: (274) [user] mfix_vars1(0, _42572)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _42572)
   Call: (275) [system] 0=_42572
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _42574, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1320, 0], [1320, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            ;; Knowledge", 1320, 0], [";;            ;; Knowledge", 1320, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            ;; Knowledge", 1320, 0], [";;            ;; Knowledge", 1320, 0])
   Call: (270) [system] compound_name_arguments(_5982, '$COMMENT', [";;            ;; Knowledge", 1320, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT', [";;            ;; Knowledge", 1320, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0)))
   Call: (267) [system] '$COMMENT'(";;            ;; Knowledge", 1320, 0)\=@='$COMMENT'(";;            ;; Knowledge", 1320, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _5968)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _92746))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _92746))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _92746))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _92746))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _92746)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _92746)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _98332))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _98332))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _98332)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _98332)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            ;; Knowledge", 1320, 0), _98332)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0)))
   Call: (267) [system] '$COMMENT'(";;            ;; Knowledge", 1320, 0)\=@='$COMMENT'(";;            ;; Knowledge", 1320, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _92746)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _5948))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _5948))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _5948))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _5948))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _5948)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _120652))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _120652))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _120652)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _120652)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            ;; Knowledge", 1320, 0), _120652)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0)))
   Call: (267) [system] '$COMMENT'(";;            ;; Knowledge", 1320, 0)\=@='$COMMENT'(";;            ;; Knowledge", 1320, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0)))
   Call: (261) [system] '$COMMENT'(";;            ;; Knowledge", 1320, 0)\=@='$COMMENT'(";;            ;; Knowledge", 1320, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; Knowledge", 1320, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            ;; Knowledge", 1320, 0), _149430, [], _149432)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            ;; Knowledge", 1320, 0), _149430, [], _149432)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            ;; Knowledge", 1320, 0), _149430, [], _149432)
   Call: (258) [system] atom('$COMMENT'(";;            ;; Knowledge", 1320, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            ;; Knowledge", 1320, 0), _149430, [], _149432)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            ;; Knowledge", 1320, 0), _149430, [], _149432)
   Call: (258) [system] compound('$COMMENT'(";;            ;; Knowledge", 1320, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            ;; Knowledge", 1320, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            ;; Knowledge", 1320, 0), _158746, _158748)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT', [";;            ;; Knowledge", 1320, 0])
^  Call: (258) [user] subst_vars([";;            ;; Knowledge", 1320, 0], _160632, [], _149432)
^  Unify: (258) [user] subst_vars([";;            ;; Knowledge", 1320, 0], [";;            ;; Knowledge", 1320, 0], [], [])
   Call: (259) [system] var([";;            ;; Knowledge", 1320, 0])
^  Redo: (258) [user] subst_vars([";;            ;; Knowledge", 1320, 0], _160632, [], _149432)
^  Unify: (258) [user] subst_vars([";;            ;; Knowledge", 1320, 0], [_164368|_164370], [], _149432)
^  Call: (259) [user] subst_vars(";;            ;; Knowledge", _164368, [], _165308)
^  Unify: (259) [user] subst_vars(";;            ;; Knowledge", ";;            ;; Knowledge", [], [])
   Call: (260) [system] var(";;            ;; Knowledge")
^  Redo: (259) [user] subst_vars(";;            ;; Knowledge", _164368, [], _165308)
^  Unify: (259) [user] subst_vars(";;            ;; Knowledge", _164368, [], _165308)
   Call: (260) [system] atom(";;            ;; Knowledge")
^  Redo: (259) [user] subst_vars(";;            ;; Knowledge", _164368, [], _165308)
^  Unify: (259) [user] subst_vars(";;            ;; Knowledge", _164368, [], _165308)
   Call: (260) [system] compound(";;            ;; Knowledge")
^  Redo: (259) [user] subst_vars(";;            ;; Knowledge", _164368, [], _165308)
^  Unify: (259) [user] subst_vars(";;            ;; Knowledge", ";;            ;; Knowledge", [], [])
^  Exit: (259) [user] subst_vars(";;            ;; Knowledge", ";;            ;; Knowledge", [], [])
^  Call: (259) [user] subst_vars([1320, 0], _164370, [], _149432)
^  Unify: (259) [user] subst_vars([1320, 0], [1320, 0], [], [])
   Call: (260) [system] var([1320, 0])
^  Redo: (259) [user] subst_vars([1320, 0], _164370, [], _149432)
^  Unify: (259) [user] subst_vars([1320, 0], [_180240|_180242], [], _149432)
^  Call: (260) [user] subst_vars(1320, _180240, [], _181180)
^  Unify: (260) [user] subst_vars(1320, 1320, [], [])
   Call: (261) [system] var(1320)
^  Redo: (260) [user] subst_vars(1320, _180240, [], _181180)
^  Unify: (260) [user] subst_vars(1320, _180240, [], _181180)
   Call: (261) [system] atom(1320)
^  Redo: (260) [user] subst_vars(1320, _180240, [], _181180)
^  Unify: (260) [user] subst_vars(1320, _180240, [], _181180)
   Call: (261) [system] compound(1320)
^  Redo: (260) [user] subst_vars(1320, _180240, [], _181180)
^  Unify: (260) [user] subst_vars(1320, 1320, [], [])
^  Exit: (260) [user] subst_vars(1320, 1320, [], [])
^  Call: (260) [user] subst_vars([0], _180242, [], _149432)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _180242, [], _149432)
^  Unify: (260) [user] subst_vars([0], [_196112|_196114], [], _149432)
^  Call: (261) [user] subst_vars(0, _196112, [], _197052)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _196112, [], _197052)
^  Unify: (261) [user] subst_vars(0, _196112, [], _197052)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _196112, [], _197052)
^  Unify: (261) [user] subst_vars(0, _196112, [], _197052)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _196112, [], _197052)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _196114, [], _149432)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _196114, [], _149432)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1320, 0], [1320, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            ;; Knowledge", 1320, 0], [";;            ;; Knowledge", 1320, 0], [], [])
   Call: (258) [system] compound_name_arguments(_149430, '$COMMENT', [";;            ;; Knowledge", 1320, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT', [";;            ;; Knowledge", 1320, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            ;; Knowledge", 1320, 0), '$COMMENT'(";;            ;; Knowledge", 1320, 0), [], [])
   Call: (257) [system] _219470=metta_file_buffer(+, '$COMMENT'(";;            ;; Knowledge", 1320, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            ;; Knowledge", 1320, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            ;; Knowledge", 1320, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            ;; Knowledge", 1320, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            ;; Knowledge", 1320, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ;; Knowledge", 1320, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ;; Knowledge", 1320, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ;; Knowledge", 1320, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ;; Knowledge", 1320, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1321, 0, 47545, '$COMMENT'(";;            (→ P Q)", 1321, 0), '$stream_position'(47545, 1321, 0, 47545)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (→ P Q)", 1321, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (→ P Q)", 1321, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            (→ P Q)", 1321, 0), _272208))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            (→ P Q)", 1321, 0), _272208))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            (→ P Q)", 1321, 0), _272208)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            (→ P Q)", 1321, 0), _272208)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            (→ P Q)", 1321, 0), _272208)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            (→ P Q)", 1321, 0), _272208)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            (→ P Q)", 1321, 0), _277820))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            (→ P Q)", 1321, 0), _277820))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            (→ P Q)", 1321, 0), _277820))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            (→ P Q)", 1321, 0), _277820))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (→ P Q)", 1321, 0), _277820)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (→ P Q)", 1321, 0), _277820)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            (→ P Q)", 1321, 0), _283406))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            (→ P Q)", 1321, 0), _283406))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            (→ P Q)", 1321, 0), _283406)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            (→ P Q)", 1321, 0), _283406)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            (→ P Q)", 1321, 0), _283406)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (→ P Q)", 1321, 0), _283406)
   Call: (270) [system] var('$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (→ P Q)", 1321, 0), _283406)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (→ P Q)", 1321, 0), '$VAR'(_290866))
   Call: (270) [system] atom('$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (→ P Q)", 1321, 0), _283406)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (→ P Q)", 1321, 0), _283406)
   Call: (270) [system] '$COMMENT'(";;            (→ P Q)", 1321, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (→ P Q)", 1321, 0), _283406)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (→ P Q)", 1321, 0), _283406)
   Call: (270) [system] '$COMMENT'(";;            (→ P Q)", 1321, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (→ P Q)", 1321, 0), _283406)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (→ P Q)", 1321, 0), _283406)
   Call: (270) [system] '$COMMENT'(";;            (→ P Q)", 1321, 0)==[_300146, _300152]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (→ P Q)", 1321, 0), _283406)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (→ P Q)", 1321, 0), _283406)
   Call: (270) [system] is_list('$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (→ P Q)", 1321, 0), _283406)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (→ P Q)", 1321, 0), _283406)
   Call: (270) [system] string('$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (→ P Q)", 1321, 0), _283406)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (→ P Q)", 1321, 0), _283406)
   Call: (270) [system] compound('$COMMENT'(";;            (→ P Q)", 1321, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            (→ P Q)", 1321, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            (→ P Q)", 1321, 0), _310348, _310350)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT', [";;            (→ P Q)", 1321, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            (→ P Q)", 1321, 0], _314090)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            (→ P Q)", 1321, 0], _314090)
   Call: (271) [apply] apply:maplist_([";;            (→ P Q)", 1321, 0], _314090, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            (→ P Q)", 1321, 0], [_316908|_316910], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            (→ P Q)", _316908)
^  Unify: (272) [user] mfix_vars1(";;            (→ P Q)", _316908)
   Call: (273) [system] var(";;            (→ P Q)")
^  Redo: (272) [user] mfix_vars1(";;            (→ P Q)", _316908)
^  Unify: (272) [user] mfix_vars1(";;            (→ P Q)", '$VAR'(_321554))
   Call: (273) [system] atom(";;            (→ P Q)")
^  Redo: (272) [user] mfix_vars1(";;            (→ P Q)", _316908)
^  Unify: (272) [user] mfix_vars1(";;            (→ P Q)", _316908)
   Call: (273) [system] ";;            (→ P Q)"==true
^  Redo: (272) [user] mfix_vars1(";;            (→ P Q)", _316908)
^  Unify: (272) [user] mfix_vars1(";;            (→ P Q)", _316908)
   Call: (273) [system] ";;            (→ P Q)"==false
^  Redo: (272) [user] mfix_vars1(";;            (→ P Q)", _316908)
^  Unify: (272) [user] mfix_vars1(";;            (→ P Q)", _316908)
   Call: (273) [system] ";;            (→ P Q)"==[_330834, _330840]
^  Redo: (272) [user] mfix_vars1(";;            (→ P Q)", _316908)
^  Unify: (272) [user] mfix_vars1(";;            (→ P Q)", _316908)
   Call: (273) [system] is_list(";;            (→ P Q)")
^  Redo: (272) [user] mfix_vars1(";;            (→ P Q)", _316908)
^  Unify: (272) [user] mfix_vars1(";;            (→ P Q)", _316908)
   Call: (273) [system] string(";;            (→ P Q)")
   Exit: (273) [system] string(";;            (→ P Q)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            (→ P Q)", _316908)
^  Unify: (272) [user] mfix_vars1(";;            (→ P Q)", _316908)
   Call: (273) [system] compound(";;            (→ P Q)")
^  Redo: (272) [user] mfix_vars1(";;            (→ P Q)", _316908)
^  Unify: (272) [user] mfix_vars1(";;            (→ P Q)", _316908)
^  Call: (273) [user] symbol(";;            (→ P Q)")
^  Unify: (273) [user] symbol(";;            (→ P Q)")
   Call: (274) [system] atom(";;            (→ P Q)")
   Fail: (274) [system] atom(";;            (→ P Q)")
^  Fail: (273) [user] symbol(";;            (→ P Q)")
^  Redo: (272) [user] mfix_vars1(";;            (→ P Q)", _316908)
   Call: (273) [system] ";;            (→ P Q)"=_316908
   Exit: (273) [system] ";;            (→ P Q)"=";;            (→ P Q)"
^  Exit: (272) [user] mfix_vars1(";;            (→ P Q)", ";;            (→ P Q)")
   Call: (272) [apply] apply:maplist_([1321, 0], _316910, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1321, 0], [_354906|_354908], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1321, _354906)
^  Unify: (273) [user] mfix_vars1(1321, _354906)
   Call: (274) [system] var(1321)
^  Redo: (273) [user] mfix_vars1(1321, _354906)
^  Unify: (273) [user] mfix_vars1(1321, '$VAR'(_359552))
   Call: (274) [system] atom(1321)
^  Redo: (273) [user] mfix_vars1(1321, _354906)
^  Unify: (273) [user] mfix_vars1(1321, _354906)
   Call: (274) [system] 1321==true
^  Redo: (273) [user] mfix_vars1(1321, _354906)
^  Unify: (273) [user] mfix_vars1(1321, _354906)
   Call: (274) [system] 1321==false
^  Redo: (273) [user] mfix_vars1(1321, _354906)
^  Unify: (273) [user] mfix_vars1(1321, _354906)
   Call: (274) [system] 1321==[_368832, _368838]
^  Redo: (273) [user] mfix_vars1(1321, _354906)
^  Unify: (273) [user] mfix_vars1(1321, _354906)
   Call: (274) [system] is_list(1321)
^  Redo: (273) [user] mfix_vars1(1321, _354906)
^  Unify: (273) [user] mfix_vars1(1321, _354906)
   Call: (274) [system] string(1321)
^  Redo: (273) [user] mfix_vars1(1321, _354906)
^  Unify: (273) [user] mfix_vars1(1321, _354906)
   Call: (274) [system] compound(1321)
^  Redo: (273) [user] mfix_vars1(1321, _354906)
^  Unify: (273) [user] mfix_vars1(1321, _354906)
^  Call: (274) [user] symbol(1321)
^  Unify: (274) [user] symbol(1321)
   Call: (275) [system] atom(1321)
   Fail: (275) [system] atom(1321)
^  Fail: (274) [user] symbol(1321)
^  Redo: (273) [user] mfix_vars1(1321, _354906)
   Call: (274) [system] 1321=_354906
   Exit: (274) [system] 1321=1321
^  Exit: (273) [user] mfix_vars1(1321, 1321)
   Call: (273) [apply] apply:maplist_([0], _354908, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_389232|_389234], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _389232)
^  Unify: (274) [user] mfix_vars1(0, _389232)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _389232)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_393878))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _389232)
^  Unify: (274) [user] mfix_vars1(0, _389232)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _389232)
^  Unify: (274) [user] mfix_vars1(0, _389232)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _389232)
^  Unify: (274) [user] mfix_vars1(0, _389232)
   Call: (275) [system] 0==[_403158, _403164]
^  Redo: (274) [user] mfix_vars1(0, _389232)
^  Unify: (274) [user] mfix_vars1(0, _389232)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _389232)
^  Unify: (274) [user] mfix_vars1(0, _389232)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _389232)
^  Unify: (274) [user] mfix_vars1(0, _389232)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _389232)
^  Unify: (274) [user] mfix_vars1(0, _389232)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _389232)
   Call: (275) [system] 0=_389232
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _389234, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1321, 0], [1321, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            (→ P Q)", 1321, 0], [";;            (→ P Q)", 1321, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            (→ P Q)", 1321, 0], [";;            (→ P Q)", 1321, 0])
   Call: (270) [system] compound_name_arguments(_283406, '$COMMENT', [";;            (→ P Q)", 1321, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT', [";;            (→ P Q)", 1321, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0)))
   Call: (267) [system] '$COMMENT'(";;            (→ P Q)", 1321, 0)\=@='$COMMENT'(";;            (→ P Q)", 1321, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (→ P Q)", 1321, 0), _277820)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            (→ P Q)", 1321, 0), _439406))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            (→ P Q)", 1321, 0), _439406))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            (→ P Q)", 1321, 0), _439406))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            (→ P Q)", 1321, 0), _439406))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (→ P Q)", 1321, 0), _439406)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (→ P Q)", 1321, 0), _439406)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            (→ P Q)", 1321, 0), _444992))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            (→ P Q)", 1321, 0), _444992))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            (→ P Q)", 1321, 0), _444992)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            (→ P Q)", 1321, 0), _444992)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            (→ P Q)", 1321, 0), _444992)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0)))
   Call: (267) [system] '$COMMENT'(";;            (→ P Q)", 1321, 0)\=@='$COMMENT'(";;            (→ P Q)", 1321, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (→ P Q)", 1321, 0), _439406)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            (→ P Q)", 1321, 0), _272208))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            (→ P Q)", 1321, 0), _272208))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            (→ P Q)", 1321, 0), _272208))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            (→ P Q)", 1321, 0), _272208))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (→ P Q)", 1321, 0), _272208)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (→ P Q)", 1321, 0), _272208)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            (→ P Q)", 1321, 0), _467312))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            (→ P Q)", 1321, 0), _467312))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            (→ P Q)", 1321, 0), _467312)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            (→ P Q)", 1321, 0), _467312)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            (→ P Q)", 1321, 0), _467312)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0)))
   Call: (267) [system] '$COMMENT'(";;            (→ P Q)", 1321, 0)\=@='$COMMENT'(";;            (→ P Q)", 1321, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (→ P Q)", 1321, 0), _272208)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0)))
   Call: (261) [system] '$COMMENT'(";;            (→ P Q)", 1321, 0)\=@='$COMMENT'(";;            (→ P Q)", 1321, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (→ P Q)", 1321, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (→ P Q)", 1321, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (→ P Q)", 1321, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (→ P Q)", 1321, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (→ P Q)", 1321, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            (→ P Q)", 1321, 0), _496090, [], _496092)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            (→ P Q)", 1321, 0), _496090, [], _496092)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            (→ P Q)", 1321, 0), _496090, [], _496092)
   Call: (258) [system] atom('$COMMENT'(";;            (→ P Q)", 1321, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            (→ P Q)", 1321, 0), _496090, [], _496092)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            (→ P Q)", 1321, 0), _496090, [], _496092)
   Call: (258) [system] compound('$COMMENT'(";;            (→ P Q)", 1321, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            (→ P Q)", 1321, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            (→ P Q)", 1321, 0), _505406, _505408)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT', [";;            (→ P Q)", 1321, 0])
^  Call: (258) [user] subst_vars([";;            (→ P Q)", 1321, 0], _507292, [], _496092)
^  Unify: (258) [user] subst_vars([";;            (→ P Q)", 1321, 0], [";;            (→ P Q)", 1321, 0], [], [])
   Call: (259) [system] var([";;            (→ P Q)", 1321, 0])
^  Redo: (258) [user] subst_vars([";;            (→ P Q)", 1321, 0], _507292, [], _496092)
^  Unify: (258) [user] subst_vars([";;            (→ P Q)", 1321, 0], [_511028|_511030], [], _496092)
^  Call: (259) [user] subst_vars(";;            (→ P Q)", _511028, [], _511968)
^  Unify: (259) [user] subst_vars(";;            (→ P Q)", ";;            (→ P Q)", [], [])
   Call: (260) [system] var(";;            (→ P Q)")
^  Redo: (259) [user] subst_vars(";;            (→ P Q)", _511028, [], _511968)
^  Unify: (259) [user] subst_vars(";;            (→ P Q)", _511028, [], _511968)
   Call: (260) [system] atom(";;            (→ P Q)")
^  Redo: (259) [user] subst_vars(";;            (→ P Q)", _511028, [], _511968)
^  Unify: (259) [user] subst_vars(";;            (→ P Q)", _511028, [], _511968)
   Call: (260) [system] compound(";;            (→ P Q)")
^  Redo: (259) [user] subst_vars(";;            (→ P Q)", _511028, [], _511968)
^  Unify: (259) [user] subst_vars(";;            (→ P Q)", ";;            (→ P Q)", [], [])
^  Exit: (259) [user] subst_vars(";;            (→ P Q)", ";;            (→ P Q)", [], [])
^  Call: (259) [user] subst_vars([1321, 0], _511030, [], _496092)
^  Unify: (259) [user] subst_vars([1321, 0], [1321, 0], [], [])
   Call: (260) [system] var([1321, 0])
^  Redo: (259) [user] subst_vars([1321, 0], _5990, [], _5960)
^  Unify: (259) [user] subst_vars([1321, 0], [_8750|_8752], [], _5960)
^  Call: (260) [user] subst_vars(1321, _8750, [], _9690)
^  Unify: (260) [user] subst_vars(1321, 1321, [], [])
   Call: (261) [system] var(1321)
^  Redo: (260) [user] subst_vars(1321, _8750, [], _9690)
^  Unify: (260) [user] subst_vars(1321, _8750, [], _9690)
   Call: (261) [system] atom(1321)
^  Redo: (260) [user] subst_vars(1321, _8750, [], _9690)
^  Unify: (260) [user] subst_vars(1321, _8750, [], _9690)
   Call: (261) [system] compound(1321)
^  Redo: (260) [user] subst_vars(1321, _8750, [], _9690)
^  Unify: (260) [user] subst_vars(1321, 1321, [], [])
^  Exit: (260) [user] subst_vars(1321, 1321, [], [])
^  Call: (260) [user] subst_vars([0], _8752, [], _5960)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _8752, [], _5960)
^  Unify: (260) [user] subst_vars([0], [_24622|_24624], [], _5960)
^  Call: (261) [user] subst_vars(0, _24622, [], _25562)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _24622, [], _25562)
^  Unify: (261) [user] subst_vars(0, _24622, [], _25562)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _24622, [], _25562)
^  Unify: (261) [user] subst_vars(0, _24622, [], _25562)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _24622, [], _25562)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _24624, [], _5960)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _24624, [], _5960)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1321, 0], [1321, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            (→ P Q)", 1321, 0], [";;            (→ P Q)", 1321, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5958, '$COMMENT', [";;            (→ P Q)", 1321, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT', [";;            (→ P Q)", 1321, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            (→ P Q)", 1321, 0), '$COMMENT'(";;            (→ P Q)", 1321, 0), [], [])
   Call: (257) [system] _47980=metta_file_buffer(+, '$COMMENT'(";;            (→ P Q)", 1321, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            (→ P Q)", 1321, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            (→ P Q)", 1321, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            (→ P Q)", 1321, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            (→ P Q)", 1321, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (→ P Q)", 1321, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (→ P Q)", 1321, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (→ P Q)", 1321, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (→ P Q)", 1321, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1322, 0, 47567, '$COMMENT'(";;            (→ Q R)", 1322, 0), '$stream_position'(47567, 1322, 0, 47569)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (→ Q R)", 1322, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (→ Q R)", 1322, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            (→ Q R)", 1322, 0), _100718))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            (→ Q R)", 1322, 0), _100718))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            (→ Q R)", 1322, 0), _100718)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            (→ Q R)", 1322, 0), _100718)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            (→ Q R)", 1322, 0), _100718)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            (→ Q R)", 1322, 0), _100718)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            (→ Q R)", 1322, 0), _106330))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            (→ Q R)", 1322, 0), _106330))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            (→ Q R)", 1322, 0), _106330))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            (→ Q R)", 1322, 0), _106330))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (→ Q R)", 1322, 0), _106330)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (→ Q R)", 1322, 0), _106330)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            (→ Q R)", 1322, 0), _111916))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            (→ Q R)", 1322, 0), _111916))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            (→ Q R)", 1322, 0), _111916)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            (→ Q R)", 1322, 0), _111916)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            (→ Q R)", 1322, 0), _111916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (→ Q R)", 1322, 0), _111916)
   Call: (270) [system] var('$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (→ Q R)", 1322, 0), _111916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (→ Q R)", 1322, 0), '$VAR'(_119376))
   Call: (270) [system] atom('$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (→ Q R)", 1322, 0), _111916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (→ Q R)", 1322, 0), _111916)
   Call: (270) [system] '$COMMENT'(";;            (→ Q R)", 1322, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (→ Q R)", 1322, 0), _111916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (→ Q R)", 1322, 0), _111916)
   Call: (270) [system] '$COMMENT'(";;            (→ Q R)", 1322, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (→ Q R)", 1322, 0), _111916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (→ Q R)", 1322, 0), _111916)
   Call: (270) [system] '$COMMENT'(";;            (→ Q R)", 1322, 0)==[_128656, _128662]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (→ Q R)", 1322, 0), _111916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (→ Q R)", 1322, 0), _111916)
   Call: (270) [system] is_list('$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (→ Q R)", 1322, 0), _111916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (→ Q R)", 1322, 0), _111916)
   Call: (270) [system] string('$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (→ Q R)", 1322, 0), _111916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (→ Q R)", 1322, 0), _111916)
   Call: (270) [system] compound('$COMMENT'(";;            (→ Q R)", 1322, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            (→ Q R)", 1322, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            (→ Q R)", 1322, 0), _138858, _138860)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT', [";;            (→ Q R)", 1322, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            (→ Q R)", 1322, 0], _142600)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            (→ Q R)", 1322, 0], _142600)
   Call: (271) [apply] apply:maplist_([";;            (→ Q R)", 1322, 0], _142600, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            (→ Q R)", 1322, 0], [_145418|_145420], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            (→ Q R)", _145418)
^  Unify: (272) [user] mfix_vars1(";;            (→ Q R)", _145418)
   Call: (273) [system] var(";;            (→ Q R)")
^  Redo: (272) [user] mfix_vars1(";;            (→ Q R)", _145418)
^  Unify: (272) [user] mfix_vars1(";;            (→ Q R)", '$VAR'(_150064))
   Call: (273) [system] atom(";;            (→ Q R)")
^  Redo: (272) [user] mfix_vars1(";;            (→ Q R)", _145418)
^  Unify: (272) [user] mfix_vars1(";;            (→ Q R)", _145418)
   Call: (273) [system] ";;            (→ Q R)"==true
^  Redo: (272) [user] mfix_vars1(";;            (→ Q R)", _145418)
^  Unify: (272) [user] mfix_vars1(";;            (→ Q R)", _145418)
   Call: (273) [system] ";;            (→ Q R)"==false
^  Redo: (272) [user] mfix_vars1(";;            (→ Q R)", _145418)
^  Unify: (272) [user] mfix_vars1(";;            (→ Q R)", _145418)
   Call: (273) [system] ";;            (→ Q R)"==[_159344, _159350]
^  Redo: (272) [user] mfix_vars1(";;            (→ Q R)", _145418)
^  Unify: (272) [user] mfix_vars1(";;            (→ Q R)", _145418)
   Call: (273) [system] is_list(";;            (→ Q R)")
^  Redo: (272) [user] mfix_vars1(";;            (→ Q R)", _145418)
^  Unify: (272) [user] mfix_vars1(";;            (→ Q R)", _145418)
   Call: (273) [system] string(";;            (→ Q R)")
   Exit: (273) [system] string(";;            (→ Q R)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            (→ Q R)", _145418)
^  Unify: (272) [user] mfix_vars1(";;            (→ Q R)", _145418)
   Call: (273) [system] compound(";;            (→ Q R)")
^  Redo: (272) [user] mfix_vars1(";;            (→ Q R)", _145418)
^  Unify: (272) [user] mfix_vars1(";;            (→ Q R)", _145418)
^  Call: (273) [user] symbol(";;            (→ Q R)")
^  Unify: (273) [user] symbol(";;            (→ Q R)")
   Call: (274) [system] atom(";;            (→ Q R)")
   Fail: (274) [system] atom(";;            (→ Q R)")
^  Fail: (273) [user] symbol(";;            (→ Q R)")
^  Redo: (272) [user] mfix_vars1(";;            (→ Q R)", _145418)
   Call: (273) [system] ";;            (→ Q R)"=_145418
   Exit: (273) [system] ";;            (→ Q R)"=";;            (→ Q R)"
^  Exit: (272) [user] mfix_vars1(";;            (→ Q R)", ";;            (→ Q R)")
   Call: (272) [apply] apply:maplist_([1322, 0], _145420, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1322, 0], [_183416|_183418], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1322, _183416)
^  Unify: (273) [user] mfix_vars1(1322, _183416)
   Call: (274) [system] var(1322)
^  Redo: (273) [user] mfix_vars1(1322, _183416)
^  Unify: (273) [user] mfix_vars1(1322, '$VAR'(_188062))
   Call: (274) [system] atom(1322)
^  Redo: (273) [user] mfix_vars1(1322, _183416)
^  Unify: (273) [user] mfix_vars1(1322, _183416)
   Call: (274) [system] 1322==true
^  Redo: (273) [user] mfix_vars1(1322, _183416)
^  Unify: (273) [user] mfix_vars1(1322, _183416)
   Call: (274) [system] 1322==false
^  Redo: (273) [user] mfix_vars1(1322, _183416)
^  Unify: (273) [user] mfix_vars1(1322, _183416)
   Call: (274) [system] 1322==[_197342, _197348]
^  Redo: (273) [user] mfix_vars1(1322, _183416)
^  Unify: (273) [user] mfix_vars1(1322, _183416)
   Call: (274) [system] is_list(1322)
^  Redo: (273) [user] mfix_vars1(1322, _183416)
^  Unify: (273) [user] mfix_vars1(1322, _183416)
   Call: (274) [system] string(1322)
^  Redo: (273) [user] mfix_vars1(1322, _183416)
^  Unify: (273) [user] mfix_vars1(1322, _183416)
   Call: (274) [system] compound(1322)
^  Redo: (273) [user] mfix_vars1(1322, _183416)
^  Unify: (273) [user] mfix_vars1(1322, _183416)
^  Call: (274) [user] symbol(1322)
^  Unify: (274) [user] symbol(1322)
   Call: (275) [system] atom(1322)
   Fail: (275) [system] atom(1322)
^  Fail: (274) [user] symbol(1322)
^  Redo: (273) [user] mfix_vars1(1322, _183416)
   Call: (274) [system] 1322=_183416
   Exit: (274) [system] 1322=1322
^  Exit: (273) [user] mfix_vars1(1322, 1322)
   Call: (273) [apply] apply:maplist_([0], _183418, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_217742|_217744], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _217742)
^  Unify: (274) [user] mfix_vars1(0, _217742)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _217742)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_222388))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _217742)
^  Unify: (274) [user] mfix_vars1(0, _217742)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _217742)
^  Unify: (274) [user] mfix_vars1(0, _217742)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _217742)
^  Unify: (274) [user] mfix_vars1(0, _217742)
   Call: (275) [system] 0==[_231668, _231674]
^  Redo: (274) [user] mfix_vars1(0, _217742)
^  Unify: (274) [user] mfix_vars1(0, _217742)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _217742)
^  Unify: (274) [user] mfix_vars1(0, _217742)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _217742)
^  Unify: (274) [user] mfix_vars1(0, _217742)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _217742)
^  Unify: (274) [user] mfix_vars1(0, _217742)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _217742)
   Call: (275) [system] 0=_217742
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _217744, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1322, 0], [1322, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            (→ Q R)", 1322, 0], [";;            (→ Q R)", 1322, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            (→ Q R)", 1322, 0], [";;            (→ Q R)", 1322, 0])
   Call: (270) [system] compound_name_arguments(_111916, '$COMMENT', [";;            (→ Q R)", 1322, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT', [";;            (→ Q R)", 1322, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0)))
   Call: (267) [system] '$COMMENT'(";;            (→ Q R)", 1322, 0)\=@='$COMMENT'(";;            (→ Q R)", 1322, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (→ Q R)", 1322, 0), _106330)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            (→ Q R)", 1322, 0), _267916))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            (→ Q R)", 1322, 0), _267916))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            (→ Q R)", 1322, 0), _267916))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            (→ Q R)", 1322, 0), _267916))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (→ Q R)", 1322, 0), _267916)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (→ Q R)", 1322, 0), _267916)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            (→ Q R)", 1322, 0), _273502))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            (→ Q R)", 1322, 0), _273502))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            (→ Q R)", 1322, 0), _273502)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            (→ Q R)", 1322, 0), _273502)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            (→ Q R)", 1322, 0), _273502)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0)))
   Call: (267) [system] '$COMMENT'(";;            (→ Q R)", 1322, 0)\=@='$COMMENT'(";;            (→ Q R)", 1322, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (→ Q R)", 1322, 0), _267916)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            (→ Q R)", 1322, 0), _100718))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            (→ Q R)", 1322, 0), _100718))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            (→ Q R)", 1322, 0), _100718))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            (→ Q R)", 1322, 0), _100718))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (→ Q R)", 1322, 0), _100718)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (→ Q R)", 1322, 0), _100718)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            (→ Q R)", 1322, 0), _295822))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            (→ Q R)", 1322, 0), _295822))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            (→ Q R)", 1322, 0), _295822)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            (→ Q R)", 1322, 0), _295822)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            (→ Q R)", 1322, 0), _295822)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0)))
   Call: (267) [system] '$COMMENT'(";;            (→ Q R)", 1322, 0)\=@='$COMMENT'(";;            (→ Q R)", 1322, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (→ Q R)", 1322, 0), _100718)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0)))
   Call: (261) [system] '$COMMENT'(";;            (→ Q R)", 1322, 0)\=@='$COMMENT'(";;            (→ Q R)", 1322, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (→ Q R)", 1322, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (→ Q R)", 1322, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (→ Q R)", 1322, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (→ Q R)", 1322, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (→ Q R)", 1322, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            (→ Q R)", 1322, 0), _324600, [], _324602)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            (→ Q R)", 1322, 0), _324600, [], _324602)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            (→ Q R)", 1322, 0), _324600, [], _324602)
   Call: (258) [system] atom('$COMMENT'(";;            (→ Q R)", 1322, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            (→ Q R)", 1322, 0), _324600, [], _324602)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            (→ Q R)", 1322, 0), _324600, [], _324602)
   Call: (258) [system] compound('$COMMENT'(";;            (→ Q R)", 1322, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            (→ Q R)", 1322, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            (→ Q R)", 1322, 0), _333916, _333918)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT', [";;            (→ Q R)", 1322, 0])
^  Call: (258) [user] subst_vars([";;            (→ Q R)", 1322, 0], _335802, [], _324602)
^  Unify: (258) [user] subst_vars([";;            (→ Q R)", 1322, 0], [";;            (→ Q R)", 1322, 0], [], [])
   Call: (259) [system] var([";;            (→ Q R)", 1322, 0])
^  Redo: (258) [user] subst_vars([";;            (→ Q R)", 1322, 0], _335802, [], _324602)
^  Unify: (258) [user] subst_vars([";;            (→ Q R)", 1322, 0], [_339538|_339540], [], _324602)
^  Call: (259) [user] subst_vars(";;            (→ Q R)", _339538, [], _340478)
^  Unify: (259) [user] subst_vars(";;            (→ Q R)", ";;            (→ Q R)", [], [])
   Call: (260) [system] var(";;            (→ Q R)")
^  Redo: (259) [user] subst_vars(";;            (→ Q R)", _339538, [], _340478)
^  Unify: (259) [user] subst_vars(";;            (→ Q R)", _339538, [], _340478)
   Call: (260) [system] atom(";;            (→ Q R)")
^  Redo: (259) [user] subst_vars(";;            (→ Q R)", _339538, [], _340478)
^  Unify: (259) [user] subst_vars(";;            (→ Q R)", _339538, [], _340478)
   Call: (260) [system] compound(";;            (→ Q R)")
^  Redo: (259) [user] subst_vars(";;            (→ Q R)", _339538, [], _340478)
^  Unify: (259) [user] subst_vars(";;            (→ Q R)", ";;            (→ Q R)", [], [])
^  Exit: (259) [user] subst_vars(";;            (→ Q R)", ";;            (→ Q R)", [], [])
^  Call: (259) [user] subst_vars([1322, 0], _339540, [], _324602)
^  Unify: (259) [user] subst_vars([1322, 0], [1322, 0], [], [])
   Call: (260) [system] var([1322, 0])
^  Redo: (259) [user] subst_vars([1322, 0], _339540, [], _324602)
^  Unify: (259) [user] subst_vars([1322, 0], [_355410|_355412], [], _324602)
^  Call: (260) [user] subst_vars(1322, _355410, [], _356350)
^  Unify: (260) [user] subst_vars(1322, 1322, [], [])
   Call: (261) [system] var(1322)
^  Redo: (260) [user] subst_vars(1322, _355410, [], _356350)
^  Unify: (260) [user] subst_vars(1322, _355410, [], _356350)
   Call: (261) [system] atom(1322)
^  Redo: (260) [user] subst_vars(1322, _355410, [], _356350)
^  Unify: (260) [user] subst_vars(1322, _355410, [], _356350)
   Call: (261) [system] compound(1322)
^  Redo: (260) [user] subst_vars(1322, _355410, [], _356350)
^  Unify: (260) [user] subst_vars(1322, 1322, [], [])
^  Exit: (260) [user] subst_vars(1322, 1322, [], [])
^  Call: (260) [user] subst_vars([0], _355412, [], _324602)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _355412, [], _324602)
^  Unify: (260) [user] subst_vars([0], [_371282|_371284], [], _324602)
^  Call: (261) [user] subst_vars(0, _371282, [], _372222)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _371282, [], _372222)
^  Unify: (261) [user] subst_vars(0, _371282, [], _372222)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _371282, [], _372222)
^  Unify: (261) [user] subst_vars(0, _371282, [], _372222)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _371282, [], _372222)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _371284, [], _324602)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _371284, [], _324602)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1322, 0], [1322, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            (→ Q R)", 1322, 0], [";;            (→ Q R)", 1322, 0], [], [])
   Call: (258) [system] compound_name_arguments(_324600, '$COMMENT', [";;            (→ Q R)", 1322, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT', [";;            (→ Q R)", 1322, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            (→ Q R)", 1322, 0), '$COMMENT'(";;            (→ Q R)", 1322, 0), [], [])
   Call: (257) [system] _394640=metta_file_buffer(+, '$COMMENT'(";;            (→ Q R)", 1322, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            (→ Q R)", 1322, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            (→ Q R)", 1322, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            (→ Q R)", 1322, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            (→ Q R)", 1322, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (→ Q R)", 1322, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (→ Q R)", 1322, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (→ Q R)", 1322, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (→ Q R)", 1322, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1323, 0, 47589, '$COMMENT'(";;", 1323, 0), '$stream_position'(47589, 1323, 0, 47593)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1323, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1323, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1323, 0), _447356))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1323, 0), _447356))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1323, 0), _447356)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1323, 0), _447356)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1323, 0), _447356)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1323, 0), _447356)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1323, 0), _452968))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1323, 0), _452968))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1323, 0), _452968))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1323, 0), _452968))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1323, 0), _452968)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1323, 0), _452968)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1323, 0), _458554))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1323, 0), _458554))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1323, 0), _458554)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1323, 0), _458554)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1323, 0), _458554)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1323, 0), _458554)
   Call: (270) [system] var('$COMMENT'(";;", 1323, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1323, 0), _458554)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1323, 0), '$VAR'(_466014))
   Call: (270) [system] atom('$COMMENT'(";;", 1323, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1323, 0), _458554)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1323, 0), _458554)
   Call: (270) [system] '$COMMENT'(";;", 1323, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1323, 0), _458554)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1323, 0), _458554)
   Call: (270) [system] '$COMMENT'(";;", 1323, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1323, 0), _458554)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1323, 0), _458554)
   Call: (270) [system] '$COMMENT'(";;", 1323, 0)==[_475294, _475300]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1323, 0), _458554)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1323, 0), _458554)
   Call: (270) [system] is_list('$COMMENT'(";;", 1323, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1323, 0), _458554)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1323, 0), _458554)
   Call: (270) [system] string('$COMMENT'(";;", 1323, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1323, 0), _458554)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1323, 0), _458554)
   Call: (270) [system] compound('$COMMENT'(";;", 1323, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1323, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1323, 0), _485496, _485498)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1323, 0), '$COMMENT', [";;", 1323, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1323, 0], _489238)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1323, 0], _489238)
   Call: (271) [apply] apply:maplist_([";;", 1323, 0], _489238, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1323, 0], [_492056|_492058], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _492056)
^  Unify: (272) [user] mfix_vars1(";;", _492056)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _492056)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_496702))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _492056)
^  Unify: (272) [user] mfix_vars1(";;", _492056)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _492056)
^  Unify: (272) [user] mfix_vars1(";;", _492056)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _492056)
^  Unify: (272) [user] mfix_vars1(";;", _492056)
   Call: (273) [system] ";;"==[_505982, _505988]
^  Redo: (272) [user] mfix_vars1(";;", _492056)
^  Unify: (272) [user] mfix_vars1(";;", _492056)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _492056)
^  Unify: (272) [user] mfix_vars1(";;", _492056)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _492056)
^  Unify: (272) [user] mfix_vars1(";;", _492056)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _492056)
^  Unify: (272) [user] mfix_vars1(";;", _492056)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] ";;"=_6022
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1323, 0], _6024, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1323, 0], [_12174|_12176], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1323, _12174)
^  Unify: (273) [user] mfix_vars1(1323, _12174)
   Call: (274) [system] var(1323)
^  Redo: (273) [user] mfix_vars1(1323, _12174)
^  Unify: (273) [user] mfix_vars1(1323, '$VAR'(_16820))
   Call: (274) [system] atom(1323)
^  Redo: (273) [user] mfix_vars1(1323, _12174)
^  Unify: (273) [user] mfix_vars1(1323, _12174)
   Call: (274) [system] 1323==true
^  Redo: (273) [user] mfix_vars1(1323, _12174)
^  Unify: (273) [user] mfix_vars1(1323, _12174)
   Call: (274) [system] 1323==false
^  Redo: (273) [user] mfix_vars1(1323, _12174)
^  Unify: (273) [user] mfix_vars1(1323, _12174)
   Call: (274) [system] 1323==[_26100, _26106]
^  Redo: (273) [user] mfix_vars1(1323, _12174)
^  Unify: (273) [user] mfix_vars1(1323, _12174)
   Call: (274) [system] is_list(1323)
^  Redo: (273) [user] mfix_vars1(1323, _12174)
^  Unify: (273) [user] mfix_vars1(1323, _12174)
   Call: (274) [system] string(1323)
^  Redo: (273) [user] mfix_vars1(1323, _12174)
^  Unify: (273) [user] mfix_vars1(1323, _12174)
   Call: (274) [system] compound(1323)
^  Redo: (273) [user] mfix_vars1(1323, _12174)
^  Unify: (273) [user] mfix_vars1(1323, _12174)
^  Call: (274) [user] symbol(1323)
^  Unify: (274) [user] symbol(1323)
   Call: (275) [system] atom(1323)
   Fail: (275) [system] atom(1323)
^  Fail: (274) [user] symbol(1323)
^  Redo: (273) [user] mfix_vars1(1323, _12174)
   Call: (274) [system] 1323=_12174
   Exit: (274) [system] 1323=1323
^  Exit: (273) [user] mfix_vars1(1323, 1323)
   Call: (273) [apply] apply:maplist_([0], _12176, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_46500|_46502], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _46500)
^  Unify: (274) [user] mfix_vars1(0, _46500)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _46500)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_51146))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _46500)
^  Unify: (274) [user] mfix_vars1(0, _46500)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _46500)
^  Unify: (274) [user] mfix_vars1(0, _46500)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _46500)
^  Unify: (274) [user] mfix_vars1(0, _46500)
   Call: (275) [system] 0==[_60426, _60432]
^  Redo: (274) [user] mfix_vars1(0, _46500)
^  Unify: (274) [user] mfix_vars1(0, _46500)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _46500)
^  Unify: (274) [user] mfix_vars1(0, _46500)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _46500)
^  Unify: (274) [user] mfix_vars1(0, _46500)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _46500)
^  Unify: (274) [user] mfix_vars1(0, _46500)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _46500)
   Call: (275) [system] 0=_46500
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _46502, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1323, 0], [1323, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1323, 0], [";;", 1323, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1323, 0], [";;", 1323, 0])
   Call: (270) [system] compound_name_arguments(_5976, '$COMMENT', [";;", 1323, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1323, 0), '$COMMENT', [";;", 1323, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1323, 0)\=@='$COMMENT'(";;", 1323, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1323, 0), _5962)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1323, 0), _96674))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1323, 0), _96674))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1323, 0), _96674))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1323, 0), _96674))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1323, 0), _96674)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1323, 0), _96674)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1323, 0), _102260))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1323, 0), _102260))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1323, 0), _102260)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1323, 0), _102260)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1323, 0), _102260)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1323, 0)\=@='$COMMENT'(";;", 1323, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1323, 0), _96674)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1323, 0), _5942))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1323, 0), _5942))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1323, 0), _5942))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1323, 0), _5942))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1323, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1323, 0), _5942)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1323, 0), _124580))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1323, 0), _124580))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1323, 0), _124580)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1323, 0), _124580)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1323, 0), _124580)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1323, 0)\=@='$COMMENT'(";;", 1323, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1323, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1323, 0)\=@='$COMMENT'(";;", 1323, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1323, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1323, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1323, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1323, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1323, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1323, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1323, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1323, 0), _153358, [], _153360)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1323, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1323, 0), _153358, [], _153360)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1323, 0), _153358, [], _153360)
   Call: (258) [system] atom('$COMMENT'(";;", 1323, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1323, 0), _153358, [], _153360)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1323, 0), _153358, [], _153360)
   Call: (258) [system] compound('$COMMENT'(";;", 1323, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1323, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1323, 0), _162674, _162676)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1323, 0), '$COMMENT', [";;", 1323, 0])
^  Call: (258) [user] subst_vars([";;", 1323, 0], _164560, [], _153360)
^  Unify: (258) [user] subst_vars([";;", 1323, 0], [";;", 1323, 0], [], [])
   Call: (259) [system] var([";;", 1323, 0])
^  Redo: (258) [user] subst_vars([";;", 1323, 0], _164560, [], _153360)
^  Unify: (258) [user] subst_vars([";;", 1323, 0], [_168296|_168298], [], _153360)
^  Call: (259) [user] subst_vars(";;", _168296, [], _169236)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _168296, [], _169236)
^  Unify: (259) [user] subst_vars(";;", _168296, [], _169236)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _168296, [], _169236)
^  Unify: (259) [user] subst_vars(";;", _168296, [], _169236)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _168296, [], _169236)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1323, 0], _168298, [], _153360)
^  Unify: (259) [user] subst_vars([1323, 0], [1323, 0], [], [])
   Call: (260) [system] var([1323, 0])
^  Redo: (259) [user] subst_vars([1323, 0], _168298, [], _153360)
^  Unify: (259) [user] subst_vars([1323, 0], [_184168|_184170], [], _153360)
^  Call: (260) [user] subst_vars(1323, _184168, [], _185108)
^  Unify: (260) [user] subst_vars(1323, 1323, [], [])
   Call: (261) [system] var(1323)
^  Redo: (260) [user] subst_vars(1323, _184168, [], _185108)
^  Unify: (260) [user] subst_vars(1323, _184168, [], _185108)
   Call: (261) [system] atom(1323)
^  Redo: (260) [user] subst_vars(1323, _184168, [], _185108)
^  Unify: (260) [user] subst_vars(1323, _184168, [], _185108)
   Call: (261) [system] compound(1323)
^  Redo: (260) [user] subst_vars(1323, _184168, [], _185108)
^  Unify: (260) [user] subst_vars(1323, 1323, [], [])
^  Exit: (260) [user] subst_vars(1323, 1323, [], [])
^  Call: (260) [user] subst_vars([0], _184170, [], _153360)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _184170, [], _153360)
^  Unify: (260) [user] subst_vars([0], [_200040|_200042], [], _153360)
^  Call: (261) [user] subst_vars(0, _200040, [], _200980)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _200040, [], _200980)
^  Unify: (261) [user] subst_vars(0, _200040, [], _200980)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _200040, [], _200980)
^  Unify: (261) [user] subst_vars(0, _200040, [], _200980)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _200040, [], _200980)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _200042, [], _153360)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _200042, [], _153360)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1323, 0], [1323, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1323, 0], [";;", 1323, 0], [], [])
   Call: (258) [system] compound_name_arguments(_153358, '$COMMENT', [";;", 1323, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1323, 0), '$COMMENT', [";;", 1323, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1323, 0), '$COMMENT'(";;", 1323, 0), [], [])
   Call: (257) [system] _223398=metta_file_buffer(+, '$COMMENT'(";;", 1323, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1323, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1323, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1323, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1323, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1323, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1323, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1323, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1323, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1324, 0, 47592, '$COMMENT'(";;            ;; Rule", 1324, 0), '$stream_position'(47592, 1324, 0, 47596)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; Rule", 1324, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; Rule", 1324, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            ;; Rule", 1324, 0), _276118))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            ;; Rule", 1324, 0), _276118))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            ;; Rule", 1324, 0), _276118)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            ;; Rule", 1324, 0), _276118)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            ;; Rule", 1324, 0), _276118)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            ;; Rule", 1324, 0), _276118)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            ;; Rule", 1324, 0), _281730))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            ;; Rule", 1324, 0), _281730))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            ;; Rule", 1324, 0), _281730))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            ;; Rule", 1324, 0), _281730))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; Rule", 1324, 0), _281730)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; Rule", 1324, 0), _281730)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            ;; Rule", 1324, 0), _287316))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            ;; Rule", 1324, 0), _287316))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            ;; Rule", 1324, 0), _287316)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            ;; Rule", 1324, 0), _287316)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Rule", 1324, 0), _287316)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Rule", 1324, 0), _287316)
   Call: (270) [system] var('$COMMENT'(";;            ;; Rule", 1324, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Rule", 1324, 0), _287316)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Rule", 1324, 0), '$VAR'(_294776))
   Call: (270) [system] atom('$COMMENT'(";;            ;; Rule", 1324, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Rule", 1324, 0), _287316)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Rule", 1324, 0), _287316)
   Call: (270) [system] '$COMMENT'(";;            ;; Rule", 1324, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Rule", 1324, 0), _287316)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Rule", 1324, 0), _287316)
   Call: (270) [system] '$COMMENT'(";;            ;; Rule", 1324, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Rule", 1324, 0), _287316)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Rule", 1324, 0), _287316)
   Call: (270) [system] '$COMMENT'(";;            ;; Rule", 1324, 0)==[_304056, _304062]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Rule", 1324, 0), _287316)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Rule", 1324, 0), _287316)
   Call: (270) [system] is_list('$COMMENT'(";;            ;; Rule", 1324, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Rule", 1324, 0), _287316)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Rule", 1324, 0), _287316)
   Call: (270) [system] string('$COMMENT'(";;            ;; Rule", 1324, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Rule", 1324, 0), _287316)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Rule", 1324, 0), _287316)
   Call: (270) [system] compound('$COMMENT'(";;            ;; Rule", 1324, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            ;; Rule", 1324, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            ;; Rule", 1324, 0), _314258, _314260)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT', [";;            ;; Rule", 1324, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            ;; Rule", 1324, 0], _318000)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            ;; Rule", 1324, 0], _318000)
   Call: (271) [apply] apply:maplist_([";;            ;; Rule", 1324, 0], _318000, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            ;; Rule", 1324, 0], [_320818|_320820], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            ;; Rule", _320818)
^  Unify: (272) [user] mfix_vars1(";;            ;; Rule", _320818)
   Call: (273) [system] var(";;            ;; Rule")
^  Redo: (272) [user] mfix_vars1(";;            ;; Rule", _320818)
^  Unify: (272) [user] mfix_vars1(";;            ;; Rule", '$VAR'(_325464))
   Call: (273) [system] atom(";;            ;; Rule")
^  Redo: (272) [user] mfix_vars1(";;            ;; Rule", _320818)
^  Unify: (272) [user] mfix_vars1(";;            ;; Rule", _320818)
   Call: (273) [system] ";;            ;; Rule"==true
^  Redo: (272) [user] mfix_vars1(";;            ;; Rule", _320818)
^  Unify: (272) [user] mfix_vars1(";;            ;; Rule", _320818)
   Call: (273) [system] ";;            ;; Rule"==false
^  Redo: (272) [user] mfix_vars1(";;            ;; Rule", _320818)
^  Unify: (272) [user] mfix_vars1(";;            ;; Rule", _320818)
   Call: (273) [system] ";;            ;; Rule"==[_334744, _334750]
^  Redo: (272) [user] mfix_vars1(";;            ;; Rule", _320818)
^  Unify: (272) [user] mfix_vars1(";;            ;; Rule", _320818)
   Call: (273) [system] is_list(";;            ;; Rule")
^  Redo: (272) [user] mfix_vars1(";;            ;; Rule", _320818)
^  Unify: (272) [user] mfix_vars1(";;            ;; Rule", _320818)
   Call: (273) [system] string(";;            ;; Rule")
   Exit: (273) [system] string(";;            ;; Rule")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            ;; Rule", _320818)
^  Unify: (272) [user] mfix_vars1(";;            ;; Rule", _320818)
   Call: (273) [system] compound(";;            ;; Rule")
^  Redo: (272) [user] mfix_vars1(";;            ;; Rule", _320818)
^  Unify: (272) [user] mfix_vars1(";;            ;; Rule", _320818)
^  Call: (273) [user] symbol(";;            ;; Rule")
^  Unify: (273) [user] symbol(";;            ;; Rule")
   Call: (274) [system] atom(";;            ;; Rule")
   Fail: (274) [system] atom(";;            ;; Rule")
^  Fail: (273) [user] symbol(";;            ;; Rule")
^  Redo: (272) [user] mfix_vars1(";;            ;; Rule", _320818)
   Call: (273) [system] ";;            ;; Rule"=_320818
   Exit: (273) [system] ";;            ;; Rule"=";;            ;; Rule"
^  Exit: (272) [user] mfix_vars1(";;            ;; Rule", ";;            ;; Rule")
   Call: (272) [apply] apply:maplist_([1324, 0], _320820, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1324, 0], [_358816|_358818], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1324, _358816)
^  Unify: (273) [user] mfix_vars1(1324, _358816)
   Call: (274) [system] var(1324)
^  Redo: (273) [user] mfix_vars1(1324, _358816)
^  Unify: (273) [user] mfix_vars1(1324, '$VAR'(_363462))
   Call: (274) [system] atom(1324)
^  Redo: (273) [user] mfix_vars1(1324, _358816)
^  Unify: (273) [user] mfix_vars1(1324, _358816)
   Call: (274) [system] 1324==true
^  Redo: (273) [user] mfix_vars1(1324, _358816)
^  Unify: (273) [user] mfix_vars1(1324, _358816)
   Call: (274) [system] 1324==false
^  Redo: (273) [user] mfix_vars1(1324, _358816)
^  Unify: (273) [user] mfix_vars1(1324, _358816)
   Call: (274) [system] 1324==[_372742, _372748]
^  Redo: (273) [user] mfix_vars1(1324, _358816)
^  Unify: (273) [user] mfix_vars1(1324, _358816)
   Call: (274) [system] is_list(1324)
^  Redo: (273) [user] mfix_vars1(1324, _358816)
^  Unify: (273) [user] mfix_vars1(1324, _358816)
   Call: (274) [system] string(1324)
^  Redo: (273) [user] mfix_vars1(1324, _358816)
^  Unify: (273) [user] mfix_vars1(1324, _358816)
   Call: (274) [system] compound(1324)
^  Redo: (273) [user] mfix_vars1(1324, _358816)
^  Unify: (273) [user] mfix_vars1(1324, _358816)
^  Call: (274) [user] symbol(1324)
^  Unify: (274) [user] symbol(1324)
   Call: (275) [system] atom(1324)
   Fail: (275) [system] atom(1324)
^  Fail: (274) [user] symbol(1324)
^  Redo: (273) [user] mfix_vars1(1324, _358816)
   Call: (274) [system] 1324=_358816
   Exit: (274) [system] 1324=1324
^  Exit: (273) [user] mfix_vars1(1324, 1324)
   Call: (273) [apply] apply:maplist_([0], _358818, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_393142|_393144], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _393142)
^  Unify: (274) [user] mfix_vars1(0, _393142)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _393142)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_397788))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _393142)
^  Unify: (274) [user] mfix_vars1(0, _393142)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _393142)
^  Unify: (274) [user] mfix_vars1(0, _393142)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _393142)
^  Unify: (274) [user] mfix_vars1(0, _393142)
   Call: (275) [system] 0==[_407068, _407074]
^  Redo: (274) [user] mfix_vars1(0, _393142)
^  Unify: (274) [user] mfix_vars1(0, _393142)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _393142)
^  Unify: (274) [user] mfix_vars1(0, _393142)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _393142)
^  Unify: (274) [user] mfix_vars1(0, _393142)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _393142)
^  Unify: (274) [user] mfix_vars1(0, _393142)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _393142)
   Call: (275) [system] 0=_393142
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _393144, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1324, 0], [1324, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            ;; Rule", 1324, 0], [";;            ;; Rule", 1324, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            ;; Rule", 1324, 0], [";;            ;; Rule", 1324, 0])
   Call: (270) [system] compound_name_arguments(_287316, '$COMMENT', [";;            ;; Rule", 1324, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT', [";;            ;; Rule", 1324, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0)))
   Call: (267) [system] '$COMMENT'(";;            ;; Rule", 1324, 0)\=@='$COMMENT'(";;            ;; Rule", 1324, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; Rule", 1324, 0), _281730)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            ;; Rule", 1324, 0), _443316))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            ;; Rule", 1324, 0), _443316))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            ;; Rule", 1324, 0), _443316))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            ;; Rule", 1324, 0), _443316))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; Rule", 1324, 0), _443316)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; Rule", 1324, 0), _443316)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            ;; Rule", 1324, 0), _448902))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            ;; Rule", 1324, 0), _448902))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            ;; Rule", 1324, 0), _448902)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            ;; Rule", 1324, 0), _448902)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            ;; Rule", 1324, 0), _448902)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0)))
   Call: (267) [system] '$COMMENT'(";;            ;; Rule", 1324, 0)\=@='$COMMENT'(";;            ;; Rule", 1324, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; Rule", 1324, 0), _443316)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            ;; Rule", 1324, 0), _276118))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            ;; Rule", 1324, 0), _276118))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            ;; Rule", 1324, 0), _276118))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            ;; Rule", 1324, 0), _276118))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; Rule", 1324, 0), _276118)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; Rule", 1324, 0), _276118)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            ;; Rule", 1324, 0), _471222))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            ;; Rule", 1324, 0), _471222))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            ;; Rule", 1324, 0), _471222)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            ;; Rule", 1324, 0), _471222)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            ;; Rule", 1324, 0), _471222)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0)))
   Call: (267) [system] '$COMMENT'(";;            ;; Rule", 1324, 0)\=@='$COMMENT'(";;            ;; Rule", 1324, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; Rule", 1324, 0), _276118)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0)))
   Call: (261) [system] '$COMMENT'(";;            ;; Rule", 1324, 0)\=@='$COMMENT'(";;            ;; Rule", 1324, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; Rule", 1324, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ;; Rule", 1324, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ;; Rule", 1324, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ;; Rule", 1324, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ;; Rule", 1324, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            ;; Rule", 1324, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            ;; Rule", 1324, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            ;; Rule", 1324, 0), _500000, [], _500002)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            ;; Rule", 1324, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            ;; Rule", 1324, 0), _500000, [], _500002)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            ;; Rule", 1324, 0), _500000, [], _500002)
   Call: (258) [system] atom('$COMMENT'(";;            ;; Rule", 1324, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            ;; Rule", 1324, 0), _500000, [], _500002)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            ;; Rule", 1324, 0), _500000, [], _500002)
   Call: (258) [system] compound('$COMMENT'(";;            ;; Rule", 1324, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            ;; Rule", 1324, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            ;; Rule", 1324, 0), _509316, _509318)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT', [";;            ;; Rule", 1324, 0])
^  Call: (258) [user] subst_vars([";;            ;; Rule", 1324, 0], _511202, [], _500002)
^  Unify: (258) [user] subst_vars([";;            ;; Rule", 1324, 0], [";;            ;; Rule", 1324, 0], [], [])
   Call: (259) [system] var([";;            ;; Rule", 1324, 0])
^  Redo: (258) [user] subst_vars([";;            ;; Rule", 1324, 0], _511202, [], _500002)
^  Unify: (258) [user] subst_vars([";;            ;; Rule", 1324, 0], [_514938|_514940], [], _500002)
^  Call: (259) [user] subst_vars(";;            ;; Rule", _514938, [], _515878)
^  Unify: (259) [user] subst_vars(";;            ;; Rule", ";;            ;; Rule", [], [])
   Call: (260) [system] var(";;            ;; Rule")
^  Redo: (259) [user] subst_vars(";;            ;; Rule", _514938, [], _515878)
^  Unify: (259) [user] subst_vars(";;            ;; Rule", _514938, [], _515878)
   Call: (260) [system] atom(";;            ;; Rule")
^  Redo: (259) [user] subst_vars(";;            ;; Rule", _514938, [], _515878)
^  Unify: (259) [user] subst_vars(";;            ;; Rule", _514938, [], _515878)
   Call: (260) [system] compound(";;            ;; Rule")
^  Redo: (259) [user] subst_vars(";;            ;; Rule", _5970, [], _5974)
^  Unify: (259) [user] subst_vars(";;            ;; Rule", ";;            ;; Rule", [], [])
^  Exit: (259) [user] subst_vars(";;            ;; Rule", ";;            ;; Rule", [], [])
^  Call: (259) [user] subst_vars([1324, 0], _5972, [], _5942)
^  Unify: (259) [user] subst_vars([1324, 0], [1324, 0], [], [])
   Call: (260) [system] var([1324, 0])
^  Redo: (259) [user] subst_vars([1324, 0], _5972, [], _5942)
^  Unify: (259) [user] subst_vars([1324, 0], [_12868|_12870], [], _5942)
^  Call: (260) [user] subst_vars(1324, _12868, [], _13808)
^  Unify: (260) [user] subst_vars(1324, 1324, [], [])
   Call: (261) [system] var(1324)
^  Redo: (260) [user] subst_vars(1324, _12868, [], _13808)
^  Unify: (260) [user] subst_vars(1324, _12868, [], _13808)
   Call: (261) [system] atom(1324)
^  Redo: (260) [user] subst_vars(1324, _12868, [], _13808)
^  Unify: (260) [user] subst_vars(1324, _12868, [], _13808)
   Call: (261) [system] compound(1324)
^  Redo: (260) [user] subst_vars(1324, _12868, [], _13808)
^  Unify: (260) [user] subst_vars(1324, 1324, [], [])
^  Exit: (260) [user] subst_vars(1324, 1324, [], [])
^  Call: (260) [user] subst_vars([0], _12870, [], _5942)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _12870, [], _5942)
^  Unify: (260) [user] subst_vars([0], [_28740|_28742], [], _5942)
^  Call: (261) [user] subst_vars(0, _28740, [], _29680)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _28740, [], _29680)
^  Unify: (261) [user] subst_vars(0, _28740, [], _29680)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _28740, [], _29680)
^  Unify: (261) [user] subst_vars(0, _28740, [], _29680)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _28740, [], _29680)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _28742, [], _5942)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _28742, [], _5942)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1324, 0], [1324, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            ;; Rule", 1324, 0], [";;            ;; Rule", 1324, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5940, '$COMMENT', [";;            ;; Rule", 1324, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT', [";;            ;; Rule", 1324, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            ;; Rule", 1324, 0), '$COMMENT'(";;            ;; Rule", 1324, 0), [], [])
   Call: (257) [system] _52098=metta_file_buffer(+, '$COMMENT'(";;            ;; Rule", 1324, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            ;; Rule", 1324, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            ;; Rule", 1324, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            ;; Rule", 1324, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            ;; Rule", 1324, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ;; Rule", 1324, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ;; Rule", 1324, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ;; Rule", 1324, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ;; Rule", 1324, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1325, 0, 47614, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$stream_position'(47614, 1325, 0, 47618)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _104868))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _104868))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _104868)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _104868)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _104868)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _104868)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _110480))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _110480))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _110480))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _110480))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _110480)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _110480)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _116066))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _116066))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _116066)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _116066)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _116066)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _116066)
   Call: (270) [system] var('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _116066)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$VAR'(_123526))
   Call: (270) [system] atom('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _116066)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _116066)
   Call: (270) [system] '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _116066)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _116066)
   Call: (270) [system] '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _116066)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _116066)
   Call: (270) [system] '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0)==[_132806, _132812]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _116066)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _116066)
   Call: (270) [system] is_list('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _116066)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _116066)
   Call: (270) [system] string('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _116066)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _116066)
   Call: (270) [system] compound('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _143008, _143010)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT', [";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0], _146750)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0], _146750)
   Call: (271) [apply] apply:maplist_([";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0], _146750, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0], [_149568|_149570], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _149568)
^  Unify: (272) [user] mfix_vars1(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _149568)
   Call: (273) [system] var(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))")
^  Redo: (272) [user] mfix_vars1(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _149568)
^  Unify: (272) [user] mfix_vars1(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", '$VAR'(_154214))
   Call: (273) [system] atom(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))")
^  Redo: (272) [user] mfix_vars1(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _149568)
^  Unify: (272) [user] mfix_vars1(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _149568)
   Call: (273) [system] ";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))"==true
^  Redo: (272) [user] mfix_vars1(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _149568)
^  Unify: (272) [user] mfix_vars1(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _149568)
   Call: (273) [system] ";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))"==false
^  Redo: (272) [user] mfix_vars1(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _149568)
^  Unify: (272) [user] mfix_vars1(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _149568)
   Call: (273) [system] ";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))"==[_163494, _163500]
^  Redo: (272) [user] mfix_vars1(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _149568)
^  Unify: (272) [user] mfix_vars1(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _149568)
   Call: (273) [system] is_list(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))")
^  Redo: (272) [user] mfix_vars1(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _149568)
^  Unify: (272) [user] mfix_vars1(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _149568)
   Call: (273) [system] string(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))")
   Exit: (273) [system] string(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _149568)
^  Unify: (272) [user] mfix_vars1(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _149568)
   Call: (273) [system] compound(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))")
^  Redo: (272) [user] mfix_vars1(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _149568)
^  Unify: (272) [user] mfix_vars1(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _149568)
^  Call: (273) [user] symbol(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))")
^  Unify: (273) [user] symbol(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))")
   Call: (274) [system] atom(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))")
   Fail: (274) [system] atom(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))")
^  Fail: (273) [user] symbol(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))")
^  Redo: (272) [user] mfix_vars1(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _149568)
   Call: (273) [system] ";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))"=_149568
   Exit: (273) [system] ";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))"=";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))"
^  Exit: (272) [user] mfix_vars1(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", ";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))")
   Call: (272) [apply] apply:maplist_([1325, 0], _149570, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1325, 0], [_187566|_187568], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1325, _187566)
^  Unify: (273) [user] mfix_vars1(1325, _187566)
   Call: (274) [system] var(1325)
^  Redo: (273) [user] mfix_vars1(1325, _187566)
^  Unify: (273) [user] mfix_vars1(1325, '$VAR'(_192212))
   Call: (274) [system] atom(1325)
^  Redo: (273) [user] mfix_vars1(1325, _187566)
^  Unify: (273) [user] mfix_vars1(1325, _187566)
   Call: (274) [system] 1325==true
^  Redo: (273) [user] mfix_vars1(1325, _187566)
^  Unify: (273) [user] mfix_vars1(1325, _187566)
   Call: (274) [system] 1325==false
^  Redo: (273) [user] mfix_vars1(1325, _187566)
^  Unify: (273) [user] mfix_vars1(1325, _187566)
   Call: (274) [system] 1325==[_201492, _201498]
^  Redo: (273) [user] mfix_vars1(1325, _187566)
^  Unify: (273) [user] mfix_vars1(1325, _187566)
   Call: (274) [system] is_list(1325)
^  Redo: (273) [user] mfix_vars1(1325, _187566)
^  Unify: (273) [user] mfix_vars1(1325, _187566)
   Call: (274) [system] string(1325)
^  Redo: (273) [user] mfix_vars1(1325, _187566)
^  Unify: (273) [user] mfix_vars1(1325, _187566)
   Call: (274) [system] compound(1325)
^  Redo: (273) [user] mfix_vars1(1325, _187566)
^  Unify: (273) [user] mfix_vars1(1325, _187566)
^  Call: (274) [user] symbol(1325)
^  Unify: (274) [user] symbol(1325)
   Call: (275) [system] atom(1325)
   Fail: (275) [system] atom(1325)
^  Fail: (274) [user] symbol(1325)
^  Redo: (273) [user] mfix_vars1(1325, _187566)
   Call: (274) [system] 1325=_187566
   Exit: (274) [system] 1325=1325
^  Exit: (273) [user] mfix_vars1(1325, 1325)
   Call: (273) [apply] apply:maplist_([0], _187568, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_221892|_221894], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _221892)
^  Unify: (274) [user] mfix_vars1(0, _221892)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _221892)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_226538))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _221892)
^  Unify: (274) [user] mfix_vars1(0, _221892)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _221892)
^  Unify: (274) [user] mfix_vars1(0, _221892)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _221892)
^  Unify: (274) [user] mfix_vars1(0, _221892)
   Call: (275) [system] 0==[_235818, _235824]
^  Redo: (274) [user] mfix_vars1(0, _221892)
^  Unify: (274) [user] mfix_vars1(0, _221892)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _221892)
^  Unify: (274) [user] mfix_vars1(0, _221892)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _221892)
^  Unify: (274) [user] mfix_vars1(0, _221892)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _221892)
^  Unify: (274) [user] mfix_vars1(0, _221892)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _221892)
   Call: (275) [system] 0=_221892
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _221894, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1325, 0], [1325, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0], [";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0], [";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0])
   Call: (270) [system] compound_name_arguments(_116066, '$COMMENT', [";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT', [";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0)))
   Call: (267) [system] '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0)\=@='$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _110480)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _272066))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _272066))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _272066))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _272066))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _272066)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _272066)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _277652))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _277652))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _277652)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _277652)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _277652)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0)))
   Call: (267) [system] '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0)\=@='$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _272066)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _104868))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _104868))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _104868))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _104868))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _104868)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _104868)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _299972))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _299972))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _299972)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _299972)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _299972)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0)))
   Call: (267) [system] '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0)\=@='$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _104868)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0)))
   Call: (261) [system] '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0)\=@='$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _328750, [], _328752)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _328750, [], _328752)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _328750, [], _328752)
   Call: (258) [system] atom('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _328750, [], _328752)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _328750, [], _328752)
   Call: (258) [system] compound('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), _338066, _338068)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT', [";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0])
^  Call: (258) [user] subst_vars([";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0], _339952, [], _328752)
^  Unify: (258) [user] subst_vars([";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0], [";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0], [], [])
   Call: (259) [system] var([";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0])
^  Redo: (258) [user] subst_vars([";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0], _339952, [], _328752)
^  Unify: (258) [user] subst_vars([";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0], [_343688|_343690], [], _328752)
^  Call: (259) [user] subst_vars(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _343688, [], _344628)
^  Unify: (259) [user] subst_vars(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", ";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", [], [])
   Call: (260) [system] var(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))")
^  Redo: (259) [user] subst_vars(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _343688, [], _344628)
^  Unify: (259) [user] subst_vars(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _343688, [], _344628)
   Call: (260) [system] atom(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))")
^  Redo: (259) [user] subst_vars(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _343688, [], _344628)
^  Unify: (259) [user] subst_vars(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _343688, [], _344628)
   Call: (260) [system] compound(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))")
^  Redo: (259) [user] subst_vars(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", _343688, [], _344628)
^  Unify: (259) [user] subst_vars(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", ";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", [], [])
^  Exit: (259) [user] subst_vars(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", ";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", [], [])
^  Call: (259) [user] subst_vars([1325, 0], _343690, [], _328752)
^  Unify: (259) [user] subst_vars([1325, 0], [1325, 0], [], [])
   Call: (260) [system] var([1325, 0])
^  Redo: (259) [user] subst_vars([1325, 0], _343690, [], _328752)
^  Unify: (259) [user] subst_vars([1325, 0], [_359560|_359562], [], _328752)
^  Call: (260) [user] subst_vars(1325, _359560, [], _360500)
^  Unify: (260) [user] subst_vars(1325, 1325, [], [])
   Call: (261) [system] var(1325)
^  Redo: (260) [user] subst_vars(1325, _359560, [], _360500)
^  Unify: (260) [user] subst_vars(1325, _359560, [], _360500)
   Call: (261) [system] atom(1325)
^  Redo: (260) [user] subst_vars(1325, _359560, [], _360500)
^  Unify: (260) [user] subst_vars(1325, _359560, [], _360500)
   Call: (261) [system] compound(1325)
^  Redo: (260) [user] subst_vars(1325, _359560, [], _360500)
^  Unify: (260) [user] subst_vars(1325, 1325, [], [])
^  Exit: (260) [user] subst_vars(1325, 1325, [], [])
^  Call: (260) [user] subst_vars([0], _359562, [], _328752)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _359562, [], _328752)
^  Unify: (260) [user] subst_vars([0], [_375432|_375434], [], _328752)
^  Call: (261) [user] subst_vars(0, _375432, [], _376372)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _375432, [], _376372)
^  Unify: (261) [user] subst_vars(0, _375432, [], _376372)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _375432, [], _376372)
^  Unify: (261) [user] subst_vars(0, _375432, [], _376372)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _375432, [], _376372)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _375434, [], _328752)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _375434, [], _328752)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1325, 0], [1325, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0], [";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0], [], [])
   Call: (258) [system] compound_name_arguments(_328750, '$COMMENT', [";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT', [";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), [], [])
   Call: (257) [system] _398790=metta_file_buffer(+, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (= (rule (→ $p $q) (→ $q $r)) (→ $p $r))", 1325, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1326, 0, 47669, '$COMMENT'(";;", 1326, 0), '$stream_position'(47669, 1326, 0, 47679)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1326, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1326, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1326, 0), _451506))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1326, 0), _451506))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1326, 0), _451506)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1326, 0), _451506)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1326, 0), _451506)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1326, 0), _451506)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1326, 0), _457118))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1326, 0), _457118))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1326, 0), _457118))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1326, 0), _457118))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1326, 0), _457118)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1326, 0), _457118)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1326, 0), _462704))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1326, 0), _462704))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1326, 0), _462704)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1326, 0), _462704)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1326, 0), _462704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1326, 0), _462704)
   Call: (270) [system] var('$COMMENT'(";;", 1326, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1326, 0), _462704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1326, 0), '$VAR'(_470164))
   Call: (270) [system] atom('$COMMENT'(";;", 1326, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1326, 0), _462704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1326, 0), _462704)
   Call: (270) [system] '$COMMENT'(";;", 1326, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1326, 0), _462704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1326, 0), _462704)
   Call: (270) [system] '$COMMENT'(";;", 1326, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1326, 0), _462704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1326, 0), _462704)
   Call: (270) [system] '$COMMENT'(";;", 1326, 0)==[_479444, _479450]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1326, 0), _462704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1326, 0), _462704)
   Call: (270) [system] is_list('$COMMENT'(";;", 1326, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1326, 0), _462704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1326, 0), _462704)
   Call: (270) [system] string('$COMMENT'(";;", 1326, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1326, 0), _462704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1326, 0), _462704)
   Call: (270) [system] compound('$COMMENT'(";;", 1326, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1326, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1326, 0), _489646, _489648)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1326, 0), '$COMMENT', [";;", 1326, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1326, 0], _493388)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1326, 0], _493388)
   Call: (271) [apply] apply:maplist_([";;", 1326, 0], _493388, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1326, 0], [_496206|_496208], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _496206)
^  Unify: (272) [user] mfix_vars1(";;", _496206)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _496206)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_500852))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _496206)
^  Unify: (272) [user] mfix_vars1(";;", _496206)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _496206)
^  Unify: (272) [user] mfix_vars1(";;", _496206)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _496206)
^  Unify: (272) [user] mfix_vars1(";;", _496206)
   Call: (273) [system] ";;"==[_510132, _510138]
^  Redo: (272) [user] mfix_vars1(";;", _496206)
^  Unify: (272) [user] mfix_vars1(";;", _496206)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _496206)
^  Unify: (272) [user] mfix_vars1(";;", _496206)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _496206)
^  Unify: (272) [user] mfix_vars1(";;", _496206)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _496206)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] ";;"=_6022
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1326, 0], _6024, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1326, 0], [_16168|_16170], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1326, _16168)
^  Unify: (273) [user] mfix_vars1(1326, _16168)
   Call: (274) [system] var(1326)
^  Redo: (273) [user] mfix_vars1(1326, _16168)
^  Unify: (273) [user] mfix_vars1(1326, '$VAR'(_20814))
   Call: (274) [system] atom(1326)
^  Redo: (273) [user] mfix_vars1(1326, _16168)
^  Unify: (273) [user] mfix_vars1(1326, _16168)
   Call: (274) [system] 1326==true
^  Redo: (273) [user] mfix_vars1(1326, _16168)
^  Unify: (273) [user] mfix_vars1(1326, _16168)
   Call: (274) [system] 1326==false
^  Redo: (273) [user] mfix_vars1(1326, _16168)
^  Unify: (273) [user] mfix_vars1(1326, _16168)
   Call: (274) [system] 1326==[_30094, _30100]
^  Redo: (273) [user] mfix_vars1(1326, _16168)
^  Unify: (273) [user] mfix_vars1(1326, _16168)
   Call: (274) [system] is_list(1326)
^  Redo: (273) [user] mfix_vars1(1326, _16168)
^  Unify: (273) [user] mfix_vars1(1326, _16168)
   Call: (274) [system] string(1326)
^  Redo: (273) [user] mfix_vars1(1326, _16168)
^  Unify: (273) [user] mfix_vars1(1326, _16168)
   Call: (274) [system] compound(1326)
^  Redo: (273) [user] mfix_vars1(1326, _16168)
^  Unify: (273) [user] mfix_vars1(1326, _16168)
^  Call: (274) [user] symbol(1326)
^  Unify: (274) [user] symbol(1326)
   Call: (275) [system] atom(1326)
   Fail: (275) [system] atom(1326)
^  Fail: (274) [user] symbol(1326)
^  Redo: (273) [user] mfix_vars1(1326, _16168)
   Call: (274) [system] 1326=_16168
   Exit: (274) [system] 1326=1326
^  Exit: (273) [user] mfix_vars1(1326, 1326)
   Call: (273) [apply] apply:maplist_([0], _16170, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_50494|_50496], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _50494)
^  Unify: (274) [user] mfix_vars1(0, _50494)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _50494)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_55140))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _50494)
^  Unify: (274) [user] mfix_vars1(0, _50494)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _50494)
^  Unify: (274) [user] mfix_vars1(0, _50494)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _50494)
^  Unify: (274) [user] mfix_vars1(0, _50494)
   Call: (275) [system] 0==[_64420, _64426]
^  Redo: (274) [user] mfix_vars1(0, _50494)
^  Unify: (274) [user] mfix_vars1(0, _50494)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _50494)
^  Unify: (274) [user] mfix_vars1(0, _50494)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _50494)
^  Unify: (274) [user] mfix_vars1(0, _50494)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _50494)
^  Unify: (274) [user] mfix_vars1(0, _50494)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _50494)
   Call: (275) [system] 0=_50494
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _50496, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1326, 0], [1326, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1326, 0], [";;", 1326, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1326, 0], [";;", 1326, 0])
   Call: (270) [system] compound_name_arguments(_5976, '$COMMENT', [";;", 1326, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1326, 0), '$COMMENT', [";;", 1326, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1326, 0)\=@='$COMMENT'(";;", 1326, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1326, 0), _5962)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1326, 0), _100668))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1326, 0), _100668))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1326, 0), _100668))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1326, 0), _100668))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1326, 0), _100668)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1326, 0), _100668)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1326, 0), _106254))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1326, 0), _106254))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1326, 0), _106254)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1326, 0), _106254)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1326, 0), _106254)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1326, 0)\=@='$COMMENT'(";;", 1326, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1326, 0), _100668)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1326, 0), _5942))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1326, 0), _5942))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1326, 0), _5942))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1326, 0), _5942))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1326, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1326, 0), _5942)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1326, 0), _128574))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1326, 0), _128574))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1326, 0), _128574)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1326, 0), _128574)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1326, 0), _128574)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1326, 0)\=@='$COMMENT'(";;", 1326, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1326, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1326, 0)\=@='$COMMENT'(";;", 1326, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1326, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1326, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1326, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1326, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1326, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1326, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1326, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1326, 0), _157352, [], _157354)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1326, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1326, 0), _157352, [], _157354)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1326, 0), _157352, [], _157354)
   Call: (258) [system] atom('$COMMENT'(";;", 1326, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1326, 0), _157352, [], _157354)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1326, 0), _157352, [], _157354)
   Call: (258) [system] compound('$COMMENT'(";;", 1326, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1326, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1326, 0), _166668, _166670)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1326, 0), '$COMMENT', [";;", 1326, 0])
^  Call: (258) [user] subst_vars([";;", 1326, 0], _168554, [], _157354)
^  Unify: (258) [user] subst_vars([";;", 1326, 0], [";;", 1326, 0], [], [])
   Call: (259) [system] var([";;", 1326, 0])
^  Redo: (258) [user] subst_vars([";;", 1326, 0], _168554, [], _157354)
^  Unify: (258) [user] subst_vars([";;", 1326, 0], [_172290|_172292], [], _157354)
^  Call: (259) [user] subst_vars(";;", _172290, [], _173230)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _172290, [], _173230)
^  Unify: (259) [user] subst_vars(";;", _172290, [], _173230)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _172290, [], _173230)
^  Unify: (259) [user] subst_vars(";;", _172290, [], _173230)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _172290, [], _173230)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1326, 0], _172292, [], _157354)
^  Unify: (259) [user] subst_vars([1326, 0], [1326, 0], [], [])
   Call: (260) [system] var([1326, 0])
^  Redo: (259) [user] subst_vars([1326, 0], _172292, [], _157354)
^  Unify: (259) [user] subst_vars([1326, 0], [_188162|_188164], [], _157354)
^  Call: (260) [user] subst_vars(1326, _188162, [], _189102)
^  Unify: (260) [user] subst_vars(1326, 1326, [], [])
   Call: (261) [system] var(1326)
^  Redo: (260) [user] subst_vars(1326, _188162, [], _189102)
^  Unify: (260) [user] subst_vars(1326, _188162, [], _189102)
   Call: (261) [system] atom(1326)
^  Redo: (260) [user] subst_vars(1326, _188162, [], _189102)
^  Unify: (260) [user] subst_vars(1326, _188162, [], _189102)
   Call: (261) [system] compound(1326)
^  Redo: (260) [user] subst_vars(1326, _188162, [], _189102)
^  Unify: (260) [user] subst_vars(1326, 1326, [], [])
^  Exit: (260) [user] subst_vars(1326, 1326, [], [])
^  Call: (260) [user] subst_vars([0], _188164, [], _157354)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _188164, [], _157354)
^  Unify: (260) [user] subst_vars([0], [_204034|_204036], [], _157354)
^  Call: (261) [user] subst_vars(0, _204034, [], _204974)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _204034, [], _204974)
^  Unify: (261) [user] subst_vars(0, _204034, [], _204974)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _204034, [], _204974)
^  Unify: (261) [user] subst_vars(0, _204034, [], _204974)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _204034, [], _204974)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _204036, [], _157354)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _204036, [], _157354)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1326, 0], [1326, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1326, 0], [";;", 1326, 0], [], [])
   Call: (258) [system] compound_name_arguments(_157352, '$COMMENT', [";;", 1326, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1326, 0), '$COMMENT', [";;", 1326, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1326, 0), '$COMMENT'(";;", 1326, 0), [], [])
   Call: (257) [system] _227392=metta_file_buffer(+, '$COMMENT'(";;", 1326, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1326, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1326, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1326, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1326, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1326, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1326, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1326, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1326, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1327, 0, 47672, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$stream_position'(47672, 1327, 0, 47682)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _280120))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _280120))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _280120)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _280120)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _280120)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _280120)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _285732))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _285732))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _285732))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _285732))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _285732)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _285732)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _291318))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _291318))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _291318)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _291318)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _291318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _291318)
   Call: (270) [system] var('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _291318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$VAR'(_298778))
   Call: (270) [system] atom('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _291318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _291318)
   Call: (270) [system] '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _291318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _291318)
   Call: (270) [system] '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _291318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _291318)
   Call: (270) [system] '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0)==[_308058, _308064]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _291318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _291318)
   Call: (270) [system] is_list('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _291318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _291318)
   Call: (270) [system] string('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _291318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _291318)
   Call: (270) [system] compound('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _318260, _318262)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT', [";;            ;; Query (does not work as expected)", 1327, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            ;; Query (does not work as expected)", 1327, 0], _322002)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            ;; Query (does not work as expected)", 1327, 0], _322002)
   Call: (271) [apply] apply:maplist_([";;            ;; Query (does not work as expected)", 1327, 0], _322002, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            ;; Query (does not work as expected)", 1327, 0], [_324820|_324822], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            ;; Query (does not work as expected)", _324820)
^  Unify: (272) [user] mfix_vars1(";;            ;; Query (does not work as expected)", _324820)
   Call: (273) [system] var(";;            ;; Query (does not work as expected)")
^  Redo: (272) [user] mfix_vars1(";;            ;; Query (does not work as expected)", _324820)
^  Unify: (272) [user] mfix_vars1(";;            ;; Query (does not work as expected)", '$VAR'(_329466))
   Call: (273) [system] atom(";;            ;; Query (does not work as expected)")
^  Redo: (272) [user] mfix_vars1(";;            ;; Query (does not work as expected)", _324820)
^  Unify: (272) [user] mfix_vars1(";;            ;; Query (does not work as expected)", _324820)
   Call: (273) [system] ";;            ;; Query (does not work as expected)"==true
^  Redo: (272) [user] mfix_vars1(";;            ;; Query (does not work as expected)", _324820)
^  Unify: (272) [user] mfix_vars1(";;            ;; Query (does not work as expected)", _324820)
   Call: (273) [system] ";;            ;; Query (does not work as expected)"==false
^  Redo: (272) [user] mfix_vars1(";;            ;; Query (does not work as expected)", _324820)
^  Unify: (272) [user] mfix_vars1(";;            ;; Query (does not work as expected)", _324820)
   Call: (273) [system] ";;            ;; Query (does not work as expected)"==[_338746, _338752]
^  Redo: (272) [user] mfix_vars1(";;            ;; Query (does not work as expected)", _324820)
^  Unify: (272) [user] mfix_vars1(";;            ;; Query (does not work as expected)", _324820)
   Call: (273) [system] is_list(";;            ;; Query (does not work as expected)")
^  Redo: (272) [user] mfix_vars1(";;            ;; Query (does not work as expected)", _324820)
^  Unify: (272) [user] mfix_vars1(";;            ;; Query (does not work as expected)", _324820)
   Call: (273) [system] string(";;            ;; Query (does not work as expected)")
   Exit: (273) [system] string(";;            ;; Query (does not work as expected)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            ;; Query (does not work as expected)", _324820)
^  Unify: (272) [user] mfix_vars1(";;            ;; Query (does not work as expected)", _324820)
   Call: (273) [system] compound(";;            ;; Query (does not work as expected)")
^  Redo: (272) [user] mfix_vars1(";;            ;; Query (does not work as expected)", _324820)
^  Unify: (272) [user] mfix_vars1(";;            ;; Query (does not work as expected)", _324820)
^  Call: (273) [user] symbol(";;            ;; Query (does not work as expected)")
^  Unify: (273) [user] symbol(";;            ;; Query (does not work as expected)")
   Call: (274) [system] atom(";;            ;; Query (does not work as expected)")
   Fail: (274) [system] atom(";;            ;; Query (does not work as expected)")
^  Fail: (273) [user] symbol(";;            ;; Query (does not work as expected)")
^  Redo: (272) [user] mfix_vars1(";;            ;; Query (does not work as expected)", _324820)
   Call: (273) [system] ";;            ;; Query (does not work as expected)"=_324820
   Exit: (273) [system] ";;            ;; Query (does not work as expected)"=";;            ;; Query (does not work as expected)"
^  Exit: (272) [user] mfix_vars1(";;            ;; Query (does not work as expected)", ";;            ;; Query (does not work as expected)")
   Call: (272) [apply] apply:maplist_([1327, 0], _324822, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1327, 0], [_362818|_362820], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1327, _362818)
^  Unify: (273) [user] mfix_vars1(1327, _362818)
   Call: (274) [system] var(1327)
^  Redo: (273) [user] mfix_vars1(1327, _362818)
^  Unify: (273) [user] mfix_vars1(1327, '$VAR'(_367464))
   Call: (274) [system] atom(1327)
^  Redo: (273) [user] mfix_vars1(1327, _362818)
^  Unify: (273) [user] mfix_vars1(1327, _362818)
   Call: (274) [system] 1327==true
^  Redo: (273) [user] mfix_vars1(1327, _362818)
^  Unify: (273) [user] mfix_vars1(1327, _362818)
   Call: (274) [system] 1327==false
^  Redo: (273) [user] mfix_vars1(1327, _362818)
^  Unify: (273) [user] mfix_vars1(1327, _362818)
   Call: (274) [system] 1327==[_376744, _376750]
^  Redo: (273) [user] mfix_vars1(1327, _362818)
^  Unify: (273) [user] mfix_vars1(1327, _362818)
   Call: (274) [system] is_list(1327)
^  Redo: (273) [user] mfix_vars1(1327, _362818)
^  Unify: (273) [user] mfix_vars1(1327, _362818)
   Call: (274) [system] string(1327)
^  Redo: (273) [user] mfix_vars1(1327, _362818)
^  Unify: (273) [user] mfix_vars1(1327, _362818)
   Call: (274) [system] compound(1327)
^  Redo: (273) [user] mfix_vars1(1327, _362818)
^  Unify: (273) [user] mfix_vars1(1327, _362818)
^  Call: (274) [user] symbol(1327)
^  Unify: (274) [user] symbol(1327)
   Call: (275) [system] atom(1327)
   Fail: (275) [system] atom(1327)
^  Fail: (274) [user] symbol(1327)
^  Redo: (273) [user] mfix_vars1(1327, _362818)
   Call: (274) [system] 1327=_362818
   Exit: (274) [system] 1327=1327
^  Exit: (273) [user] mfix_vars1(1327, 1327)
   Call: (273) [apply] apply:maplist_([0], _362820, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_397144|_397146], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _397144)
^  Unify: (274) [user] mfix_vars1(0, _397144)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _397144)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_401790))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _397144)
^  Unify: (274) [user] mfix_vars1(0, _397144)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _397144)
^  Unify: (274) [user] mfix_vars1(0, _397144)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _397144)
^  Unify: (274) [user] mfix_vars1(0, _397144)
   Call: (275) [system] 0==[_411070, _411076]
^  Redo: (274) [user] mfix_vars1(0, _397144)
^  Unify: (274) [user] mfix_vars1(0, _397144)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _397144)
^  Unify: (274) [user] mfix_vars1(0, _397144)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _397144)
^  Unify: (274) [user] mfix_vars1(0, _397144)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _397144)
^  Unify: (274) [user] mfix_vars1(0, _397144)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _397144)
   Call: (275) [system] 0=_397144
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _397146, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1327, 0], [1327, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            ;; Query (does not work as expected)", 1327, 0], [";;            ;; Query (does not work as expected)", 1327, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            ;; Query (does not work as expected)", 1327, 0], [";;            ;; Query (does not work as expected)", 1327, 0])
   Call: (270) [system] compound_name_arguments(_291318, '$COMMENT', [";;            ;; Query (does not work as expected)", 1327, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT', [";;            ;; Query (does not work as expected)", 1327, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0)))
   Call: (267) [system] '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0)\=@='$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _285732)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _447318))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _447318))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _447318))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _447318))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _447318)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _447318)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _452904))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _452904))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _452904)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _452904)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _452904)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0)))
   Call: (267) [system] '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0)\=@='$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _447318)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _280120))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _280120))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _280120))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _280120))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _280120)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _280120)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _475224))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _475224))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _475224)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _475224)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _475224)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0)))
   Call: (267) [system] '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0)\=@='$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _280120)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0)))
   Call: (261) [system] '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0)\=@='$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _504002, [], _504004)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _504002, [], _504004)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _504002, [], _504004)
   Call: (258) [system] atom('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _504002, [], _504004)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _504002, [], _504004)
   Call: (258) [system] compound('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), _513318, _513320)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT', [";;            ;; Query (does not work as expected)", 1327, 0])
^  Call: (258) [user] subst_vars([";;            ;; Query (does not work as expected)", 1327, 0], _515204, [], _504004)
^  Unify: (258) [user] subst_vars([";;            ;; Query (does not work as expected)", 1327, 0], [";;            ;; Query (does not work as expected)", 1327, 0], [], [])
   Call: (259) [system] var([";;            ;; Query (does not work as expected)", 1327, 0])
^  Redo: (258) [user] subst_vars([";;            ;; Query (does not work as expected)", 1327, 0], _515204, [], _504004)
^  Unify: (258) [user] subst_vars([";;            ;; Query (does not work as expected)", 1327, 0], [_518940|_518942], [], _504004)
^  Call: (259) [user] subst_vars(";;            ;; Query (does not work as expected)", _518940, [], _519880)
^  Unify: (259) [user] subst_vars(";;            ;; Query (does not work as expected)", ";;            ;; Query (does not work as expected)", [], [])
   Call: (260) [system] var(";;            ;; Query (does not work as expected)")
^  Redo: (259) [user] subst_vars(";;            ;; Query (does not work as expected)", _518940, [], _519880)
^  Unify: (259) [user] subst_vars(";;            ;; Query (does not work as expected)", _5978, [], _5982)
   Call: (260) [system] atom(";;            ;; Query (does not work as expected)")
^  Redo: (259) [user] subst_vars(";;            ;; Query (does not work as expected)", _5978, [], _5982)
^  Unify: (259) [user] subst_vars(";;            ;; Query (does not work as expected)", _5978, [], _5982)
   Call: (260) [system] compound(";;            ;; Query (does not work as expected)")
^  Redo: (259) [user] subst_vars(";;            ;; Query (does not work as expected)", _5978, [], _5982)
^  Unify: (259) [user] subst_vars(";;            ;; Query (does not work as expected)", ";;            ;; Query (does not work as expected)", [], [])
^  Exit: (259) [user] subst_vars(";;            ;; Query (does not work as expected)", ";;            ;; Query (does not work as expected)", [], [])
^  Call: (259) [user] subst_vars([1327, 0], _5980, [], _5950)
^  Unify: (259) [user] subst_vars([1327, 0], [1327, 0], [], [])
   Call: (260) [system] var([1327, 0])
^  Redo: (259) [user] subst_vars([1327, 0], _5980, [], _5950)
^  Unify: (259) [user] subst_vars([1327, 0], [_16850|_16852], [], _5950)
^  Call: (260) [user] subst_vars(1327, _16850, [], _17790)
^  Unify: (260) [user] subst_vars(1327, 1327, [], [])
   Call: (261) [system] var(1327)
^  Redo: (260) [user] subst_vars(1327, _16850, [], _17790)
^  Unify: (260) [user] subst_vars(1327, _16850, [], _17790)
   Call: (261) [system] atom(1327)
^  Redo: (260) [user] subst_vars(1327, _16850, [], _17790)
^  Unify: (260) [user] subst_vars(1327, _16850, [], _17790)
   Call: (261) [system] compound(1327)
^  Redo: (260) [user] subst_vars(1327, _16850, [], _17790)
^  Unify: (260) [user] subst_vars(1327, 1327, [], [])
^  Exit: (260) [user] subst_vars(1327, 1327, [], [])
^  Call: (260) [user] subst_vars([0], _16852, [], _5950)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _16852, [], _5950)
^  Unify: (260) [user] subst_vars([0], [_32722|_32724], [], _5950)
^  Call: (261) [user] subst_vars(0, _32722, [], _33662)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _32722, [], _33662)
^  Unify: (261) [user] subst_vars(0, _32722, [], _33662)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _32722, [], _33662)
^  Unify: (261) [user] subst_vars(0, _32722, [], _33662)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _32722, [], _33662)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _32724, [], _5950)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _32724, [], _5950)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1327, 0], [1327, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            ;; Query (does not work as expected)", 1327, 0], [";;            ;; Query (does not work as expected)", 1327, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5948, '$COMMENT', [";;            ;; Query (does not work as expected)", 1327, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT', [";;            ;; Query (does not work as expected)", 1327, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), [], [])
   Call: (257) [system] _56080=metta_file_buffer(+, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ;; Query (does not work as expected)", 1327, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1328, 0, 47723, '$COMMENT'(";;            (= (query $kb)", 1328, 0), '$stream_position'(47723, 1328, 0, 47733)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _108802))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _108802))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _108802)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _108802)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            (= (query $kb)", 1328, 0), _108802)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            (= (query $kb)", 1328, 0), _108802)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _114414))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _114414))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _114414))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _114414))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _114414)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _114414)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _120000))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _120000))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _120000)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _120000)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            (= (query $kb)", 1328, 0), _120000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (query $kb)", 1328, 0), _120000)
   Call: (270) [system] var('$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (query $kb)", 1328, 0), _120000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (query $kb)", 1328, 0), '$VAR'(_127460))
   Call: (270) [system] atom('$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (query $kb)", 1328, 0), _120000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (query $kb)", 1328, 0), _120000)
   Call: (270) [system] '$COMMENT'(";;            (= (query $kb)", 1328, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (query $kb)", 1328, 0), _120000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (query $kb)", 1328, 0), _120000)
   Call: (270) [system] '$COMMENT'(";;            (= (query $kb)", 1328, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (query $kb)", 1328, 0), _120000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (query $kb)", 1328, 0), _120000)
   Call: (270) [system] '$COMMENT'(";;            (= (query $kb)", 1328, 0)==[_136740, _136746]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (query $kb)", 1328, 0), _120000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (query $kb)", 1328, 0), _120000)
   Call: (270) [system] is_list('$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (query $kb)", 1328, 0), _120000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (query $kb)", 1328, 0), _120000)
   Call: (270) [system] string('$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (query $kb)", 1328, 0), _120000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (query $kb)", 1328, 0), _120000)
   Call: (270) [system] compound('$COMMENT'(";;            (= (query $kb)", 1328, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            (= (query $kb)", 1328, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            (= (query $kb)", 1328, 0), _146942, _146944)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT', [";;            (= (query $kb)", 1328, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            (= (query $kb)", 1328, 0], _150684)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            (= (query $kb)", 1328, 0], _150684)
   Call: (271) [apply] apply:maplist_([";;            (= (query $kb)", 1328, 0], _150684, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            (= (query $kb)", 1328, 0], [_153502|_153504], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            (= (query $kb)", _153502)
^  Unify: (272) [user] mfix_vars1(";;            (= (query $kb)", _153502)
   Call: (273) [system] var(";;            (= (query $kb)")
^  Redo: (272) [user] mfix_vars1(";;            (= (query $kb)", _153502)
^  Unify: (272) [user] mfix_vars1(";;            (= (query $kb)", '$VAR'(_158148))
   Call: (273) [system] atom(";;            (= (query $kb)")
^  Redo: (272) [user] mfix_vars1(";;            (= (query $kb)", _153502)
^  Unify: (272) [user] mfix_vars1(";;            (= (query $kb)", _153502)
   Call: (273) [system] ";;            (= (query $kb)"==true
^  Redo: (272) [user] mfix_vars1(";;            (= (query $kb)", _153502)
^  Unify: (272) [user] mfix_vars1(";;            (= (query $kb)", _153502)
   Call: (273) [system] ";;            (= (query $kb)"==false
^  Redo: (272) [user] mfix_vars1(";;            (= (query $kb)", _153502)
^  Unify: (272) [user] mfix_vars1(";;            (= (query $kb)", _153502)
   Call: (273) [system] ";;            (= (query $kb)"==[_167428, _167434]
^  Redo: (272) [user] mfix_vars1(";;            (= (query $kb)", _153502)
^  Unify: (272) [user] mfix_vars1(";;            (= (query $kb)", _153502)
   Call: (273) [system] is_list(";;            (= (query $kb)")
^  Redo: (272) [user] mfix_vars1(";;            (= (query $kb)", _153502)
^  Unify: (272) [user] mfix_vars1(";;            (= (query $kb)", _153502)
   Call: (273) [system] string(";;            (= (query $kb)")
   Exit: (273) [system] string(";;            (= (query $kb)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            (= (query $kb)", _153502)
^  Unify: (272) [user] mfix_vars1(";;            (= (query $kb)", _153502)
   Call: (273) [system] compound(";;            (= (query $kb)")
^  Redo: (272) [user] mfix_vars1(";;            (= (query $kb)", _153502)
^  Unify: (272) [user] mfix_vars1(";;            (= (query $kb)", _153502)
^  Call: (273) [user] symbol(";;            (= (query $kb)")
^  Unify: (273) [user] symbol(";;            (= (query $kb)")
   Call: (274) [system] atom(";;            (= (query $kb)")
   Fail: (274) [system] atom(";;            (= (query $kb)")
^  Fail: (273) [user] symbol(";;            (= (query $kb)")
^  Redo: (272) [user] mfix_vars1(";;            (= (query $kb)", _153502)
   Call: (273) [system] ";;            (= (query $kb)"=_153502
   Exit: (273) [system] ";;            (= (query $kb)"=";;            (= (query $kb)"
^  Exit: (272) [user] mfix_vars1(";;            (= (query $kb)", ";;            (= (query $kb)")
   Call: (272) [apply] apply:maplist_([1328, 0], _153504, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1328, 0], [_191500|_191502], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1328, _191500)
^  Unify: (273) [user] mfix_vars1(1328, _191500)
   Call: (274) [system] var(1328)
^  Redo: (273) [user] mfix_vars1(1328, _191500)
^  Unify: (273) [user] mfix_vars1(1328, '$VAR'(_196146))
   Call: (274) [system] atom(1328)
^  Redo: (273) [user] mfix_vars1(1328, _191500)
^  Unify: (273) [user] mfix_vars1(1328, _191500)
   Call: (274) [system] 1328==true
^  Redo: (273) [user] mfix_vars1(1328, _191500)
^  Unify: (273) [user] mfix_vars1(1328, _191500)
   Call: (274) [system] 1328==false
^  Redo: (273) [user] mfix_vars1(1328, _191500)
^  Unify: (273) [user] mfix_vars1(1328, _191500)
   Call: (274) [system] 1328==[_205426, _205432]
^  Redo: (273) [user] mfix_vars1(1328, _191500)
^  Unify: (273) [user] mfix_vars1(1328, _191500)
   Call: (274) [system] is_list(1328)
^  Redo: (273) [user] mfix_vars1(1328, _191500)
^  Unify: (273) [user] mfix_vars1(1328, _191500)
   Call: (274) [system] string(1328)
^  Redo: (273) [user] mfix_vars1(1328, _191500)
^  Unify: (273) [user] mfix_vars1(1328, _191500)
   Call: (274) [system] compound(1328)
^  Redo: (273) [user] mfix_vars1(1328, _191500)
^  Unify: (273) [user] mfix_vars1(1328, _191500)
^  Call: (274) [user] symbol(1328)
^  Unify: (274) [user] symbol(1328)
   Call: (275) [system] atom(1328)
   Fail: (275) [system] atom(1328)
^  Fail: (274) [user] symbol(1328)
^  Redo: (273) [user] mfix_vars1(1328, _191500)
   Call: (274) [system] 1328=_191500
   Exit: (274) [system] 1328=1328
^  Exit: (273) [user] mfix_vars1(1328, 1328)
   Call: (273) [apply] apply:maplist_([0], _191502, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_225826|_225828], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _225826)
^  Unify: (274) [user] mfix_vars1(0, _225826)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _225826)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_230472))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _225826)
^  Unify: (274) [user] mfix_vars1(0, _225826)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _225826)
^  Unify: (274) [user] mfix_vars1(0, _225826)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _225826)
^  Unify: (274) [user] mfix_vars1(0, _225826)
   Call: (275) [system] 0==[_239752, _239758]
^  Redo: (274) [user] mfix_vars1(0, _225826)
^  Unify: (274) [user] mfix_vars1(0, _225826)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _225826)
^  Unify: (274) [user] mfix_vars1(0, _225826)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _225826)
^  Unify: (274) [user] mfix_vars1(0, _225826)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _225826)
^  Unify: (274) [user] mfix_vars1(0, _225826)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _225826)
   Call: (275) [system] 0=_225826
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _225828, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1328, 0], [1328, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            (= (query $kb)", 1328, 0], [";;            (= (query $kb)", 1328, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            (= (query $kb)", 1328, 0], [";;            (= (query $kb)", 1328, 0])
   Call: (270) [system] compound_name_arguments(_120000, '$COMMENT', [";;            (= (query $kb)", 1328, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT', [";;            (= (query $kb)", 1328, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0)))
   Call: (267) [system] '$COMMENT'(";;            (= (query $kb)", 1328, 0)\=@='$COMMENT'(";;            (= (query $kb)", 1328, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _114414)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _276000))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _276000))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _276000))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _276000))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _276000)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _276000)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _281586))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _281586))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _281586)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _281586)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            (= (query $kb)", 1328, 0), _281586)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0)))
   Call: (267) [system] '$COMMENT'(";;            (= (query $kb)", 1328, 0)\=@='$COMMENT'(";;            (= (query $kb)", 1328, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _276000)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _108802))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _108802))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _108802))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _108802))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _108802)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _108802)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _303906))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _303906))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _303906)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _303906)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            (= (query $kb)", 1328, 0), _303906)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0)))
   Call: (267) [system] '$COMMENT'(";;            (= (query $kb)", 1328, 0)\=@='$COMMENT'(";;            (= (query $kb)", 1328, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _108802)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0)))
   Call: (261) [system] '$COMMENT'(";;            (= (query $kb)", 1328, 0)\=@='$COMMENT'(";;            (= (query $kb)", 1328, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (= (query $kb)", 1328, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            (= (query $kb)", 1328, 0), _332684, [], _332686)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            (= (query $kb)", 1328, 0), _332684, [], _332686)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            (= (query $kb)", 1328, 0), _332684, [], _332686)
   Call: (258) [system] atom('$COMMENT'(";;            (= (query $kb)", 1328, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            (= (query $kb)", 1328, 0), _332684, [], _332686)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            (= (query $kb)", 1328, 0), _332684, [], _332686)
   Call: (258) [system] compound('$COMMENT'(";;            (= (query $kb)", 1328, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            (= (query $kb)", 1328, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            (= (query $kb)", 1328, 0), _342000, _342002)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT', [";;            (= (query $kb)", 1328, 0])
^  Call: (258) [user] subst_vars([";;            (= (query $kb)", 1328, 0], _343886, [], _332686)
^  Unify: (258) [user] subst_vars([";;            (= (query $kb)", 1328, 0], [";;            (= (query $kb)", 1328, 0], [], [])
   Call: (259) [system] var([";;            (= (query $kb)", 1328, 0])
^  Redo: (258) [user] subst_vars([";;            (= (query $kb)", 1328, 0], _343886, [], _332686)
^  Unify: (258) [user] subst_vars([";;            (= (query $kb)", 1328, 0], [_347622|_347624], [], _332686)
^  Call: (259) [user] subst_vars(";;            (= (query $kb)", _347622, [], _348562)
^  Unify: (259) [user] subst_vars(";;            (= (query $kb)", ";;            (= (query $kb)", [], [])
   Call: (260) [system] var(";;            (= (query $kb)")
^  Redo: (259) [user] subst_vars(";;            (= (query $kb)", _347622, [], _348562)
^  Unify: (259) [user] subst_vars(";;            (= (query $kb)", _347622, [], _348562)
   Call: (260) [system] atom(";;            (= (query $kb)")
^  Redo: (259) [user] subst_vars(";;            (= (query $kb)", _347622, [], _348562)
^  Unify: (259) [user] subst_vars(";;            (= (query $kb)", _347622, [], _348562)
   Call: (260) [system] compound(";;            (= (query $kb)")
^  Redo: (259) [user] subst_vars(";;            (= (query $kb)", _347622, [], _348562)
^  Unify: (259) [user] subst_vars(";;            (= (query $kb)", ";;            (= (query $kb)", [], [])
^  Exit: (259) [user] subst_vars(";;            (= (query $kb)", ";;            (= (query $kb)", [], [])
^  Call: (259) [user] subst_vars([1328, 0], _347624, [], _332686)
^  Unify: (259) [user] subst_vars([1328, 0], [1328, 0], [], [])
   Call: (260) [system] var([1328, 0])
^  Redo: (259) [user] subst_vars([1328, 0], _347624, [], _332686)
^  Unify: (259) [user] subst_vars([1328, 0], [_363494|_363496], [], _332686)
^  Call: (260) [user] subst_vars(1328, _363494, [], _364434)
^  Unify: (260) [user] subst_vars(1328, 1328, [], [])
   Call: (261) [system] var(1328)
^  Redo: (260) [user] subst_vars(1328, _363494, [], _364434)
^  Unify: (260) [user] subst_vars(1328, _363494, [], _364434)
   Call: (261) [system] atom(1328)
^  Redo: (260) [user] subst_vars(1328, _363494, [], _364434)
^  Unify: (260) [user] subst_vars(1328, _363494, [], _364434)
   Call: (261) [system] compound(1328)
^  Redo: (260) [user] subst_vars(1328, _363494, [], _364434)
^  Unify: (260) [user] subst_vars(1328, 1328, [], [])
^  Exit: (260) [user] subst_vars(1328, 1328, [], [])
^  Call: (260) [user] subst_vars([0], _363496, [], _332686)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _363496, [], _332686)
^  Unify: (260) [user] subst_vars([0], [_379366|_379368], [], _332686)
^  Call: (261) [user] subst_vars(0, _379366, [], _380306)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _379366, [], _380306)
^  Unify: (261) [user] subst_vars(0, _379366, [], _380306)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _379366, [], _380306)
^  Unify: (261) [user] subst_vars(0, _379366, [], _380306)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _379366, [], _380306)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _379368, [], _332686)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _379368, [], _332686)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1328, 0], [1328, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            (= (query $kb)", 1328, 0], [";;            (= (query $kb)", 1328, 0], [], [])
   Call: (258) [system] compound_name_arguments(_332684, '$COMMENT', [";;            (= (query $kb)", 1328, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT', [";;            (= (query $kb)", 1328, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            (= (query $kb)", 1328, 0), '$COMMENT'(";;            (= (query $kb)", 1328, 0), [], [])
   Call: (257) [system] _402724=metta_file_buffer(+, '$COMMENT'(";;            (= (query $kb)", 1328, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            (= (query $kb)", 1328, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            (= (query $kb)", 1328, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            (= (query $kb)", 1328, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            (= (query $kb)", 1328, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (= (query $kb)", 1328, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (= (query $kb)", 1328, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (= (query $kb)", 1328, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (= (query $kb)", 1328, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1329, 0, 47752, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$stream_position'(47752, 1329, 0, 47762)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _455480))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _455480))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _455480)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _455480)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _455480)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _455480)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _461092))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _461092))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _461092))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _461092))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _461092)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _461092)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _466678))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _466678))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _466678)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _466678)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _466678)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _466678)
   Call: (270) [system] var('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _466678)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$VAR'(_474138))
   Call: (270) [system] atom('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _466678)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _466678)
   Call: (270) [system] '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _466678)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _466678)
   Call: (270) [system] '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _466678)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _466678)
   Call: (270) [system] '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0)==[_483418, _483424]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _466678)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _466678)
   Call: (270) [system] is_list('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _466678)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _466678)
   Call: (270) [system] string('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _466678)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _466678)
   Call: (270) [system] compound('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
   Exit: (270) [system] compound('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _493620, _493622)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT', [";;               (let* (($pq (→ $p $q))", 1329, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;               (let* (($pq (→ $p $q))", 1329, 0], _497362)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;               (let* (($pq (→ $p $q))", 1329, 0], _497362)
   Call: (271) [apply] apply:maplist_([";;               (let* (($pq (→ $p $q))", 1329, 0], _497362, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;               (let* (($pq (→ $p $q))", 1329, 0], [_500180|_500182], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;               (let* (($pq (→ $p $q))", _500180)
^  Unify: (272) [user] mfix_vars1(";;               (let* (($pq (→ $p $q))", _500180)
   Call: (273) [system] var(";;               (let* (($pq (→ $p $q))")
^  Redo: (272) [user] mfix_vars1(";;               (let* (($pq (→ $p $q))", _500180)
^  Unify: (272) [user] mfix_vars1(";;               (let* (($pq (→ $p $q))", '$VAR'(_504826))
   Call: (273) [system] atom(";;               (let* (($pq (→ $p $q))")
^  Redo: (272) [user] mfix_vars1(";;               (let* (($pq (→ $p $q))", _500180)
^  Unify: (272) [user] mfix_vars1(";;               (let* (($pq (→ $p $q))", _500180)
   Call: (273) [system] ";;               (let* (($pq (→ $p $q))"==true
^  Redo: (272) [user] mfix_vars1(";;               (let* (($pq (→ $p $q))", _500180)
^  Unify: (272) [user] mfix_vars1(";;               (let* (($pq (→ $p $q))", _500180)
   Call: (273) [system] ";;               (let* (($pq (→ $p $q))"==false
^  Redo: (272) [user] mfix_vars1(";;               (let* (($pq (→ $p $q))", _500180)
^  Unify: (272) [user] mfix_vars1(";;               (let* (($pq (→ $p $q))", _500180)
   Call: (273) [system] ";;               (let* (($pq (→ $p $q))"==[_514106, _514112]
^  Redo: (272) [user] mfix_vars1(";;               (let* (($pq (→ $p $q))", _500180)
^  Unify: (272) [user] mfix_vars1(";;               (let* (($pq (→ $p $q))", _500180)
   Call: (273) [system] is_list(";;               (let* (($pq (→ $p $q))")
^  Redo: (272) [user] mfix_vars1(";;               (let* (($pq (→ $p $q))", _500180)
^  Unify: (272) [user] mfix_vars1(";;               (let* (($pq (→ $p $q))", _500180)
   Call: (273) [system] string(";;               (let* (($pq (→ $p $q))")
   Exit: (273) [system] string(";;               (let* (($pq (→ $p $q))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;               (let* (($pq (→ $p $q))", _6062)
^  Unify: (272) [user] mfix_vars1(";;               (let* (($pq (→ $p $q))", _6062)
   Call: (273) [system] compound(";;               (let* (($pq (→ $p $q))")
^  Redo: (272) [user] mfix_vars1(";;               (let* (($pq (→ $p $q))", _6062)
^  Unify: (272) [user] mfix_vars1(";;               (let* (($pq (→ $p $q))", _6062)
^  Call: (273) [user] symbol(";;               (let* (($pq (→ $p $q))")
^  Unify: (273) [user] symbol(";;               (let* (($pq (→ $p $q))")
   Call: (274) [system] atom(";;               (let* (($pq (→ $p $q))")
   Fail: (274) [system] atom(";;               (let* (($pq (→ $p $q))")
^  Fail: (273) [user] symbol(";;               (let* (($pq (→ $p $q))")
^  Redo: (272) [user] mfix_vars1(";;               (let* (($pq (→ $p $q))", _6062)
   Call: (273) [system] ";;               (let* (($pq (→ $p $q))"=_6062
   Exit: (273) [system] ";;               (let* (($pq (→ $p $q))"=";;               (let* (($pq (→ $p $q))"
^  Exit: (272) [user] mfix_vars1(";;               (let* (($pq (→ $p $q))", ";;               (let* (($pq (→ $p $q))")
   Call: (272) [apply] apply:maplist_([1329, 0], _6064, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1329, 0], [_20314|_20316], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1329, _20314)
^  Unify: (273) [user] mfix_vars1(1329, _20314)
   Call: (274) [system] var(1329)
^  Redo: (273) [user] mfix_vars1(1329, _20314)
^  Unify: (273) [user] mfix_vars1(1329, '$VAR'(_24960))
   Call: (274) [system] atom(1329)
^  Redo: (273) [user] mfix_vars1(1329, _20314)
^  Unify: (273) [user] mfix_vars1(1329, _20314)
   Call: (274) [system] 1329==true
^  Redo: (273) [user] mfix_vars1(1329, _20314)
^  Unify: (273) [user] mfix_vars1(1329, _20314)
   Call: (274) [system] 1329==false
^  Redo: (273) [user] mfix_vars1(1329, _20314)
^  Unify: (273) [user] mfix_vars1(1329, _20314)
   Call: (274) [system] 1329==[_34240, _34246]
^  Redo: (273) [user] mfix_vars1(1329, _20314)
^  Unify: (273) [user] mfix_vars1(1329, _20314)
   Call: (274) [system] is_list(1329)
^  Redo: (273) [user] mfix_vars1(1329, _20314)
^  Unify: (273) [user] mfix_vars1(1329, _20314)
   Call: (274) [system] string(1329)
^  Redo: (273) [user] mfix_vars1(1329, _20314)
^  Unify: (273) [user] mfix_vars1(1329, _20314)
   Call: (274) [system] compound(1329)
^  Redo: (273) [user] mfix_vars1(1329, _20314)
^  Unify: (273) [user] mfix_vars1(1329, _20314)
^  Call: (274) [user] symbol(1329)
^  Unify: (274) [user] symbol(1329)
   Call: (275) [system] atom(1329)
   Fail: (275) [system] atom(1329)
^  Fail: (274) [user] symbol(1329)
^  Redo: (273) [user] mfix_vars1(1329, _20314)
   Call: (274) [system] 1329=_20314
   Exit: (274) [system] 1329=1329
^  Exit: (273) [user] mfix_vars1(1329, 1329)
   Call: (273) [apply] apply:maplist_([0], _20316, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_54640|_54642], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _54640)
^  Unify: (274) [user] mfix_vars1(0, _54640)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _54640)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_59286))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _54640)
^  Unify: (274) [user] mfix_vars1(0, _54640)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _54640)
^  Unify: (274) [user] mfix_vars1(0, _54640)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _54640)
^  Unify: (274) [user] mfix_vars1(0, _54640)
   Call: (275) [system] 0==[_68566, _68572]
^  Redo: (274) [user] mfix_vars1(0, _54640)
^  Unify: (274) [user] mfix_vars1(0, _54640)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _54640)
^  Unify: (274) [user] mfix_vars1(0, _54640)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _54640)
^  Unify: (274) [user] mfix_vars1(0, _54640)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _54640)
^  Unify: (274) [user] mfix_vars1(0, _54640)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _54640)
   Call: (275) [system] 0=_54640
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _54642, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1329, 0], [1329, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;               (let* (($pq (→ $p $q))", 1329, 0], [";;               (let* (($pq (→ $p $q))", 1329, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;               (let* (($pq (→ $p $q))", 1329, 0], [";;               (let* (($pq (→ $p $q))", 1329, 0])
   Call: (270) [system] compound_name_arguments(_6016, '$COMMENT', [";;               (let* (($pq (→ $p $q))", 1329, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT', [";;               (let* (($pq (→ $p $q))", 1329, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0)))
   Call: (267) [system] '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0)\=@='$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _6002)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _104814))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _104814))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _104814))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _104814))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _104814)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _104814)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _110400))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _110400))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _110400)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _110400)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _110400)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0)))
   Call: (267) [system] '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0)\=@='$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _104814)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _5982))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _5982))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _5982))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _5982))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _5982)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _5982)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _132720))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _132720))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _132720)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _132720)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _132720)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0)))
   Call: (267) [system] '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0)\=@='$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _5982)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0)))
   Call: (261) [system] '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0)\=@='$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _161498, [], _161500)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _161498, [], _161500)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _161498, [], _161500)
   Call: (258) [system] atom('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _161498, [], _161500)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _161498, [], _161500)
   Call: (258) [system] compound('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
   Exit: (258) [system] compound('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), _170814, _170816)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT', [";;               (let* (($pq (→ $p $q))", 1329, 0])
^  Call: (258) [user] subst_vars([";;               (let* (($pq (→ $p $q))", 1329, 0], _172700, [], _161500)
^  Unify: (258) [user] subst_vars([";;               (let* (($pq (→ $p $q))", 1329, 0], [";;               (let* (($pq (→ $p $q))", 1329, 0], [], [])
   Call: (259) [system] var([";;               (let* (($pq (→ $p $q))", 1329, 0])
^  Redo: (258) [user] subst_vars([";;               (let* (($pq (→ $p $q))", 1329, 0], _172700, [], _161500)
^  Unify: (258) [user] subst_vars([";;               (let* (($pq (→ $p $q))", 1329, 0], [_176436|_176438], [], _161500)
^  Call: (259) [user] subst_vars(";;               (let* (($pq (→ $p $q))", _176436, [], _177376)
^  Unify: (259) [user] subst_vars(";;               (let* (($pq (→ $p $q))", ";;               (let* (($pq (→ $p $q))", [], [])
   Call: (260) [system] var(";;               (let* (($pq (→ $p $q))")
^  Redo: (259) [user] subst_vars(";;               (let* (($pq (→ $p $q))", _176436, [], _177376)
^  Unify: (259) [user] subst_vars(";;               (let* (($pq (→ $p $q))", _176436, [], _177376)
   Call: (260) [system] atom(";;               (let* (($pq (→ $p $q))")
^  Redo: (259) [user] subst_vars(";;               (let* (($pq (→ $p $q))", _176436, [], _177376)
^  Unify: (259) [user] subst_vars(";;               (let* (($pq (→ $p $q))", _176436, [], _177376)
   Call: (260) [system] compound(";;               (let* (($pq (→ $p $q))")
^  Redo: (259) [user] subst_vars(";;               (let* (($pq (→ $p $q))", _176436, [], _177376)
^  Unify: (259) [user] subst_vars(";;               (let* (($pq (→ $p $q))", ";;               (let* (($pq (→ $p $q))", [], [])
^  Exit: (259) [user] subst_vars(";;               (let* (($pq (→ $p $q))", ";;               (let* (($pq (→ $p $q))", [], [])
^  Call: (259) [user] subst_vars([1329, 0], _176438, [], _161500)
^  Unify: (259) [user] subst_vars([1329, 0], [1329, 0], [], [])
   Call: (260) [system] var([1329, 0])
^  Redo: (259) [user] subst_vars([1329, 0], _176438, [], _161500)
^  Unify: (259) [user] subst_vars([1329, 0], [_192308|_192310], [], _161500)
^  Call: (260) [user] subst_vars(1329, _192308, [], _193248)
^  Unify: (260) [user] subst_vars(1329, 1329, [], [])
   Call: (261) [system] var(1329)
^  Redo: (260) [user] subst_vars(1329, _192308, [], _193248)
^  Unify: (260) [user] subst_vars(1329, _192308, [], _193248)
   Call: (261) [system] atom(1329)
^  Redo: (260) [user] subst_vars(1329, _192308, [], _193248)
^  Unify: (260) [user] subst_vars(1329, _192308, [], _193248)
   Call: (261) [system] compound(1329)
^  Redo: (260) [user] subst_vars(1329, _192308, [], _193248)
^  Unify: (260) [user] subst_vars(1329, 1329, [], [])
^  Exit: (260) [user] subst_vars(1329, 1329, [], [])
^  Call: (260) [user] subst_vars([0], _192310, [], _161500)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _192310, [], _161500)
^  Unify: (260) [user] subst_vars([0], [_208180|_208182], [], _161500)
^  Call: (261) [user] subst_vars(0, _208180, [], _209120)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _208180, [], _209120)
^  Unify: (261) [user] subst_vars(0, _208180, [], _209120)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _208180, [], _209120)
^  Unify: (261) [user] subst_vars(0, _208180, [], _209120)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _208180, [], _209120)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _208182, [], _161500)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _208182, [], _161500)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1329, 0], [1329, 0], [], [])
^  Exit: (258) [user] subst_vars([";;               (let* (($pq (→ $p $q))", 1329, 0], [";;               (let* (($pq (→ $p $q))", 1329, 0], [], [])
   Call: (258) [system] compound_name_arguments(_161498, '$COMMENT', [";;               (let* (($pq (→ $p $q))", 1329, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT', [";;               (let* (($pq (→ $p $q))", 1329, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), [], [])
   Call: (257) [system] _231538=metta_file_buffer(+, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;               (let* (($pq (→ $p $q))", 1329, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1330, 0, 47792, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$stream_position'(47792, 1330, 0, 47804)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _284294))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _284294))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _284294)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _284294)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _284294)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _284294)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _289906))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _289906))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _289906))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _289906))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _289906)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _289906)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _295492))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _295492))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _295492)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _295492)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _295492)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _295492)
   Call: (270) [system] var('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _295492)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$VAR'(_302952))
   Call: (270) [system] atom('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _295492)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _295492)
   Call: (270) [system] '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _295492)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _295492)
   Call: (270) [system] '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _295492)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _295492)
   Call: (270) [system] '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0)==[_312232, _312238]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _295492)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _295492)
   Call: (270) [system] is_list('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _295492)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _295492)
   Call: (270) [system] string('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _295492)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _295492)
   Call: (270) [system] compound('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
   Exit: (270) [system] compound('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _322434, _322436)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT', [";;                      ($qr (→ $q $r)))", 1330, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;                      ($qr (→ $q $r)))", 1330, 0], _326176)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;                      ($qr (→ $q $r)))", 1330, 0], _326176)
   Call: (271) [apply] apply:maplist_([";;                      ($qr (→ $q $r)))", 1330, 0], _326176, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;                      ($qr (→ $q $r)))", 1330, 0], [_328994|_328996], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;                      ($qr (→ $q $r)))", _328994)
^  Unify: (272) [user] mfix_vars1(";;                      ($qr (→ $q $r)))", _328994)
   Call: (273) [system] var(";;                      ($qr (→ $q $r)))")
^  Redo: (272) [user] mfix_vars1(";;                      ($qr (→ $q $r)))", _328994)
^  Unify: (272) [user] mfix_vars1(";;                      ($qr (→ $q $r)))", '$VAR'(_333640))
   Call: (273) [system] atom(";;                      ($qr (→ $q $r)))")
^  Redo: (272) [user] mfix_vars1(";;                      ($qr (→ $q $r)))", _328994)
^  Unify: (272) [user] mfix_vars1(";;                      ($qr (→ $q $r)))", _328994)
   Call: (273) [system] ";;                      ($qr (→ $q $r)))"==true
^  Redo: (272) [user] mfix_vars1(";;                      ($qr (→ $q $r)))", _328994)
^  Unify: (272) [user] mfix_vars1(";;                      ($qr (→ $q $r)))", _328994)
   Call: (273) [system] ";;                      ($qr (→ $q $r)))"==false
^  Redo: (272) [user] mfix_vars1(";;                      ($qr (→ $q $r)))", _328994)
^  Unify: (272) [user] mfix_vars1(";;                      ($qr (→ $q $r)))", _328994)
   Call: (273) [system] ";;                      ($qr (→ $q $r)))"==[_342920, _342926]
^  Redo: (272) [user] mfix_vars1(";;                      ($qr (→ $q $r)))", _328994)
^  Unify: (272) [user] mfix_vars1(";;                      ($qr (→ $q $r)))", _328994)
   Call: (273) [system] is_list(";;                      ($qr (→ $q $r)))")
^  Redo: (272) [user] mfix_vars1(";;                      ($qr (→ $q $r)))", _328994)
^  Unify: (272) [user] mfix_vars1(";;                      ($qr (→ $q $r)))", _328994)
   Call: (273) [system] string(";;                      ($qr (→ $q $r)))")
   Exit: (273) [system] string(";;                      ($qr (→ $q $r)))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;                      ($qr (→ $q $r)))", _328994)
^  Unify: (272) [user] mfix_vars1(";;                      ($qr (→ $q $r)))", _328994)
   Call: (273) [system] compound(";;                      ($qr (→ $q $r)))")
^  Redo: (272) [user] mfix_vars1(";;                      ($qr (→ $q $r)))", _328994)
^  Unify: (272) [user] mfix_vars1(";;                      ($qr (→ $q $r)))", _328994)
^  Call: (273) [user] symbol(";;                      ($qr (→ $q $r)))")
^  Unify: (273) [user] symbol(";;                      ($qr (→ $q $r)))")
   Call: (274) [system] atom(";;                      ($qr (→ $q $r)))")
   Fail: (274) [system] atom(";;                      ($qr (→ $q $r)))")
^  Fail: (273) [user] symbol(";;                      ($qr (→ $q $r)))")
^  Redo: (272) [user] mfix_vars1(";;                      ($qr (→ $q $r)))", _328994)
   Call: (273) [system] ";;                      ($qr (→ $q $r)))"=_328994
   Exit: (273) [system] ";;                      ($qr (→ $q $r)))"=";;                      ($qr (→ $q $r)))"
^  Exit: (272) [user] mfix_vars1(";;                      ($qr (→ $q $r)))", ";;                      ($qr (→ $q $r)))")
   Call: (272) [apply] apply:maplist_([1330, 0], _328996, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1330, 0], [_366992|_366994], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1330, _366992)
^  Unify: (273) [user] mfix_vars1(1330, _366992)
   Call: (274) [system] var(1330)
^  Redo: (273) [user] mfix_vars1(1330, _366992)
^  Unify: (273) [user] mfix_vars1(1330, '$VAR'(_371638))
   Call: (274) [system] atom(1330)
^  Redo: (273) [user] mfix_vars1(1330, _366992)
^  Unify: (273) [user] mfix_vars1(1330, _366992)
   Call: (274) [system] 1330==true
^  Redo: (273) [user] mfix_vars1(1330, _366992)
^  Unify: (273) [user] mfix_vars1(1330, _366992)
   Call: (274) [system] 1330==false
^  Redo: (273) [user] mfix_vars1(1330, _366992)
^  Unify: (273) [user] mfix_vars1(1330, _366992)
   Call: (274) [system] 1330==[_380918, _380924]
^  Redo: (273) [user] mfix_vars1(1330, _366992)
^  Unify: (273) [user] mfix_vars1(1330, _366992)
   Call: (274) [system] is_list(1330)
^  Redo: (273) [user] mfix_vars1(1330, _366992)
^  Unify: (273) [user] mfix_vars1(1330, _366992)
   Call: (274) [system] string(1330)
^  Redo: (273) [user] mfix_vars1(1330, _366992)
^  Unify: (273) [user] mfix_vars1(1330, _366992)
   Call: (274) [system] compound(1330)
^  Redo: (273) [user] mfix_vars1(1330, _366992)
^  Unify: (273) [user] mfix_vars1(1330, _366992)
^  Call: (274) [user] symbol(1330)
^  Unify: (274) [user] symbol(1330)
   Call: (275) [system] atom(1330)
   Fail: (275) [system] atom(1330)
^  Fail: (274) [user] symbol(1330)
^  Redo: (273) [user] mfix_vars1(1330, _366992)
   Call: (274) [system] 1330=_366992
   Exit: (274) [system] 1330=1330
^  Exit: (273) [user] mfix_vars1(1330, 1330)
   Call: (273) [apply] apply:maplist_([0], _366994, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_401318|_401320], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _401318)
^  Unify: (274) [user] mfix_vars1(0, _401318)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _401318)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_405964))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _401318)
^  Unify: (274) [user] mfix_vars1(0, _401318)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _401318)
^  Unify: (274) [user] mfix_vars1(0, _401318)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _401318)
^  Unify: (274) [user] mfix_vars1(0, _401318)
   Call: (275) [system] 0==[_415244, _415250]
^  Redo: (274) [user] mfix_vars1(0, _401318)
^  Unify: (274) [user] mfix_vars1(0, _401318)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _401318)
^  Unify: (274) [user] mfix_vars1(0, _401318)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _401318)
^  Unify: (274) [user] mfix_vars1(0, _401318)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _401318)
^  Unify: (274) [user] mfix_vars1(0, _401318)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _401318)
   Call: (275) [system] 0=_401318
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _401320, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1330, 0], [1330, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;                      ($qr (→ $q $r)))", 1330, 0], [";;                      ($qr (→ $q $r)))", 1330, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;                      ($qr (→ $q $r)))", 1330, 0], [";;                      ($qr (→ $q $r)))", 1330, 0])
   Call: (270) [system] compound_name_arguments(_295492, '$COMMENT', [";;                      ($qr (→ $q $r)))", 1330, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT', [";;                      ($qr (→ $q $r)))", 1330, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0)))
   Call: (267) [system] '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0)\=@='$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _289906)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _451492))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _451492))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _451492))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _451492))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _451492)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _451492)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _457078))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _457078))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _457078)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _457078)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _457078)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0)))
   Call: (267) [system] '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0)\=@='$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _451492)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _284294))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _284294))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _284294))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _284294))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _284294)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _284294)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _479398))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _479398))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _479398)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _479398)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _479398)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0)))
   Call: (267) [system] '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0)\=@='$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _284294)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0)))
   Call: (261) [system] '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0)\=@='$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _508176, [], _508178)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _508176, [], _508178)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _508176, [], _508178)
   Call: (258) [system] atom('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _508176, [], _508178)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _508176, [], _508178)
   Call: (258) [system] compound('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
   Exit: (258) [system] compound('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), _517492, _517494)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT', [";;                      ($qr (→ $q $r)))", 1330, 0])
^  Call: (258) [user] subst_vars([";;                      ($qr (→ $q $r)))", 1330, 0], _519378, [], _508178)
^  Unify: (258) [user] subst_vars([";;                      ($qr (→ $q $r)))", 1330, 0], [";;                      ($qr (→ $q $r)))", 1330, 0], [], [])
   Call: (259) [system] var([";;                      ($qr (→ $q $r)))", 1330, 0])
^  Redo: (258) [user] subst_vars([";;                      ($qr (→ $q $r)))", 1330, 0], _519378, [], _508178)
^  Unify: (258) [user] subst_vars([";;                      ($qr (→ $q $r)))", 1330, 0], [_523114|_523116], [], _508178)
^  Call: (259) [user] subst_vars(";;                      ($qr (→ $q $r)))", _6006, [], _6012)
^  Unify: (259) [user] subst_vars(";;                      ($qr (→ $q $r)))", ";;                      ($qr (→ $q $r)))", [], [])
   Call: (260) [system] var(";;                      ($qr (→ $q $r)))")
^  Redo: (259) [user] subst_vars(";;                      ($qr (→ $q $r)))", _6006, [], _6012)
^  Unify: (259) [user] subst_vars(";;                      ($qr (→ $q $r)))", _6006, [], _6012)
   Call: (260) [system] atom(";;                      ($qr (→ $q $r)))")
^  Redo: (259) [user] subst_vars(";;                      ($qr (→ $q $r)))", _6006, [], _6012)
^  Unify: (259) [user] subst_vars(";;                      ($qr (→ $q $r)))", _6006, [], _6012)
   Call: (260) [system] compound(";;                      ($qr (→ $q $r)))")
^  Redo: (259) [user] subst_vars(";;                      ($qr (→ $q $r)))", _6006, [], _6012)
^  Unify: (259) [user] subst_vars(";;                      ($qr (→ $q $r)))", ";;                      ($qr (→ $q $r)))", [], [])
^  Exit: (259) [user] subst_vars(";;                      ($qr (→ $q $r)))", ";;                      ($qr (→ $q $r)))", [], [])
^  Call: (259) [user] subst_vars([1330, 0], _6008, [], _5978)
^  Unify: (259) [user] subst_vars([1330, 0], [1330, 0], [], [])
   Call: (260) [system] var([1330, 0])
^  Redo: (259) [user] subst_vars([1330, 0], _6008, [], _5978)
^  Unify: (259) [user] subst_vars([1330, 0], [_20890|_20892], [], _5978)
^  Call: (260) [user] subst_vars(1330, _20890, [], _21830)
^  Unify: (260) [user] subst_vars(1330, 1330, [], [])
   Call: (261) [system] var(1330)
^  Redo: (260) [user] subst_vars(1330, _20890, [], _21830)
^  Unify: (260) [user] subst_vars(1330, _20890, [], _21830)
   Call: (261) [system] atom(1330)
^  Redo: (260) [user] subst_vars(1330, _20890, [], _21830)
^  Unify: (260) [user] subst_vars(1330, _20890, [], _21830)
   Call: (261) [system] compound(1330)
^  Redo: (260) [user] subst_vars(1330, _20890, [], _21830)
^  Unify: (260) [user] subst_vars(1330, 1330, [], [])
^  Exit: (260) [user] subst_vars(1330, 1330, [], [])
^  Call: (260) [user] subst_vars([0], _20892, [], _5978)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _20892, [], _5978)
^  Unify: (260) [user] subst_vars([0], [_36762|_36764], [], _5978)
^  Call: (261) [user] subst_vars(0, _36762, [], _37702)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _36762, [], _37702)
^  Unify: (261) [user] subst_vars(0, _36762, [], _37702)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _36762, [], _37702)
^  Unify: (261) [user] subst_vars(0, _36762, [], _37702)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _36762, [], _37702)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _36764, [], _5978)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _36764, [], _5978)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1330, 0], [1330, 0], [], [])
^  Exit: (258) [user] subst_vars([";;                      ($qr (→ $q $r)))", 1330, 0], [";;                      ($qr (→ $q $r)))", 1330, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5976, '$COMMENT', [";;                      ($qr (→ $q $r)))", 1330, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT', [";;                      ($qr (→ $q $r)))", 1330, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), [], [])
   Call: (257) [system] _60120=metta_file_buffer(+, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                      ($qr (→ $q $r)))", 1330, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1331, 0, 47833, '$COMMENT'(";;                 (match $kb", 1331, 0), '$stream_position'(47833, 1331, 0, 47847)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (match $kb", 1331, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (match $kb", 1331, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;                 (match $kb", 1331, 0), _112842))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                 (match $kb", 1331, 0), _112842))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;                 (match $kb", 1331, 0), _112842)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                 (match $kb", 1331, 0), _112842)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;                 (match $kb", 1331, 0), _112842)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;                 (match $kb", 1331, 0), _112842)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;                 (match $kb", 1331, 0), _118454))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                 (match $kb", 1331, 0), _118454))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;                 (match $kb", 1331, 0), _118454))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                 (match $kb", 1331, 0), _118454))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (match $kb", 1331, 0), _118454)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (match $kb", 1331, 0), _118454)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;                 (match $kb", 1331, 0), _124040))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                 (match $kb", 1331, 0), _124040))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;                 (match $kb", 1331, 0), _124040)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                 (match $kb", 1331, 0), _124040)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;                 (match $kb", 1331, 0), _124040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (match $kb", 1331, 0), _124040)
   Call: (270) [system] var('$COMMENT'(";;                 (match $kb", 1331, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (match $kb", 1331, 0), _124040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (match $kb", 1331, 0), '$VAR'(_131500))
   Call: (270) [system] atom('$COMMENT'(";;                 (match $kb", 1331, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (match $kb", 1331, 0), _124040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (match $kb", 1331, 0), _124040)
   Call: (270) [system] '$COMMENT'(";;                 (match $kb", 1331, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (match $kb", 1331, 0), _124040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (match $kb", 1331, 0), _124040)
   Call: (270) [system] '$COMMENT'(";;                 (match $kb", 1331, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (match $kb", 1331, 0), _124040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (match $kb", 1331, 0), _124040)
   Call: (270) [system] '$COMMENT'(";;                 (match $kb", 1331, 0)==[_140780, _140786]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (match $kb", 1331, 0), _124040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (match $kb", 1331, 0), _124040)
   Call: (270) [system] is_list('$COMMENT'(";;                 (match $kb", 1331, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (match $kb", 1331, 0), _124040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (match $kb", 1331, 0), _124040)
   Call: (270) [system] string('$COMMENT'(";;                 (match $kb", 1331, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (match $kb", 1331, 0), _124040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (match $kb", 1331, 0), _124040)
   Call: (270) [system] compound('$COMMENT'(";;                 (match $kb", 1331, 0))
   Exit: (270) [system] compound('$COMMENT'(";;                 (match $kb", 1331, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;                 (match $kb", 1331, 0), _150982, _150984)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT', [";;                 (match $kb", 1331, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;                 (match $kb", 1331, 0], _154724)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;                 (match $kb", 1331, 0], _154724)
   Call: (271) [apply] apply:maplist_([";;                 (match $kb", 1331, 0], _154724, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;                 (match $kb", 1331, 0], [_157542|_157544], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;                 (match $kb", _157542)
^  Unify: (272) [user] mfix_vars1(";;                 (match $kb", _157542)
   Call: (273) [system] var(";;                 (match $kb")
^  Redo: (272) [user] mfix_vars1(";;                 (match $kb", _157542)
^  Unify: (272) [user] mfix_vars1(";;                 (match $kb", '$VAR'(_162188))
   Call: (273) [system] atom(";;                 (match $kb")
^  Redo: (272) [user] mfix_vars1(";;                 (match $kb", _157542)
^  Unify: (272) [user] mfix_vars1(";;                 (match $kb", _157542)
   Call: (273) [system] ";;                 (match $kb"==true
^  Redo: (272) [user] mfix_vars1(";;                 (match $kb", _157542)
^  Unify: (272) [user] mfix_vars1(";;                 (match $kb", _157542)
   Call: (273) [system] ";;                 (match $kb"==false
^  Redo: (272) [user] mfix_vars1(";;                 (match $kb", _157542)
^  Unify: (272) [user] mfix_vars1(";;                 (match $kb", _157542)
   Call: (273) [system] ";;                 (match $kb"==[_171468, _171474]
^  Redo: (272) [user] mfix_vars1(";;                 (match $kb", _157542)
^  Unify: (272) [user] mfix_vars1(";;                 (match $kb", _157542)
   Call: (273) [system] is_list(";;                 (match $kb")
^  Redo: (272) [user] mfix_vars1(";;                 (match $kb", _157542)
^  Unify: (272) [user] mfix_vars1(";;                 (match $kb", _157542)
   Call: (273) [system] string(";;                 (match $kb")
   Exit: (273) [system] string(";;                 (match $kb")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;                 (match $kb", _157542)
^  Unify: (272) [user] mfix_vars1(";;                 (match $kb", _157542)
   Call: (273) [system] compound(";;                 (match $kb")
^  Redo: (272) [user] mfix_vars1(";;                 (match $kb", _157542)
^  Unify: (272) [user] mfix_vars1(";;                 (match $kb", _157542)
^  Call: (273) [user] symbol(";;                 (match $kb")
^  Unify: (273) [user] symbol(";;                 (match $kb")
   Call: (274) [system] atom(";;                 (match $kb")
   Fail: (274) [system] atom(";;                 (match $kb")
^  Fail: (273) [user] symbol(";;                 (match $kb")
^  Redo: (272) [user] mfix_vars1(";;                 (match $kb", _157542)
   Call: (273) [system] ";;                 (match $kb"=_157542
   Exit: (273) [system] ";;                 (match $kb"=";;                 (match $kb"
^  Exit: (272) [user] mfix_vars1(";;                 (match $kb", ";;                 (match $kb")
   Call: (272) [apply] apply:maplist_([1331, 0], _157544, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1331, 0], [_195540|_195542], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1331, _195540)
^  Unify: (273) [user] mfix_vars1(1331, _195540)
   Call: (274) [system] var(1331)
^  Redo: (273) [user] mfix_vars1(1331, _195540)
^  Unify: (273) [user] mfix_vars1(1331, '$VAR'(_200186))
   Call: (274) [system] atom(1331)
^  Redo: (273) [user] mfix_vars1(1331, _195540)
^  Unify: (273) [user] mfix_vars1(1331, _195540)
   Call: (274) [system] 1331==true
^  Redo: (273) [user] mfix_vars1(1331, _195540)
^  Unify: (273) [user] mfix_vars1(1331, _195540)
   Call: (274) [system] 1331==false
^  Redo: (273) [user] mfix_vars1(1331, _195540)
^  Unify: (273) [user] mfix_vars1(1331, _195540)
   Call: (274) [system] 1331==[_209466, _209472]
^  Redo: (273) [user] mfix_vars1(1331, _195540)
^  Unify: (273) [user] mfix_vars1(1331, _195540)
   Call: (274) [system] is_list(1331)
^  Redo: (273) [user] mfix_vars1(1331, _195540)
^  Unify: (273) [user] mfix_vars1(1331, _195540)
   Call: (274) [system] string(1331)
^  Redo: (273) [user] mfix_vars1(1331, _195540)
^  Unify: (273) [user] mfix_vars1(1331, _195540)
   Call: (274) [system] compound(1331)
^  Redo: (273) [user] mfix_vars1(1331, _195540)
^  Unify: (273) [user] mfix_vars1(1331, _195540)
^  Call: (274) [user] symbol(1331)
^  Unify: (274) [user] symbol(1331)
   Call: (275) [system] atom(1331)
   Fail: (275) [system] atom(1331)
^  Fail: (274) [user] symbol(1331)
^  Redo: (273) [user] mfix_vars1(1331, _195540)
   Call: (274) [system] 1331=_195540
   Exit: (274) [system] 1331=1331
^  Exit: (273) [user] mfix_vars1(1331, 1331)
   Call: (273) [apply] apply:maplist_([0], _195542, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_229866|_229868], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _229866)
^  Unify: (274) [user] mfix_vars1(0, _229866)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _229866)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_234512))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _229866)
^  Unify: (274) [user] mfix_vars1(0, _229866)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _229866)
^  Unify: (274) [user] mfix_vars1(0, _229866)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _229866)
^  Unify: (274) [user] mfix_vars1(0, _229866)
   Call: (275) [system] 0==[_243792, _243798]
^  Redo: (274) [user] mfix_vars1(0, _229866)
^  Unify: (274) [user] mfix_vars1(0, _229866)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _229866)
^  Unify: (274) [user] mfix_vars1(0, _229866)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _229866)
^  Unify: (274) [user] mfix_vars1(0, _229866)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _229866)
^  Unify: (274) [user] mfix_vars1(0, _229866)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _229866)
   Call: (275) [system] 0=_229866
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _229868, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1331, 0], [1331, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;                 (match $kb", 1331, 0], [";;                 (match $kb", 1331, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;                 (match $kb", 1331, 0], [";;                 (match $kb", 1331, 0])
   Call: (270) [system] compound_name_arguments(_124040, '$COMMENT', [";;                 (match $kb", 1331, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT', [";;                 (match $kb", 1331, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0)))
   Call: (267) [system] '$COMMENT'(";;                 (match $kb", 1331, 0)\=@='$COMMENT'(";;                 (match $kb", 1331, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (match $kb", 1331, 0), _118454)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;                 (match $kb", 1331, 0), _280040))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                 (match $kb", 1331, 0), _280040))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;                 (match $kb", 1331, 0), _280040))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                 (match $kb", 1331, 0), _280040))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (match $kb", 1331, 0), _280040)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (match $kb", 1331, 0), _280040)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;                 (match $kb", 1331, 0), _285626))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                 (match $kb", 1331, 0), _285626))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;                 (match $kb", 1331, 0), _285626)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                 (match $kb", 1331, 0), _285626)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;                 (match $kb", 1331, 0), _285626)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0)))
   Call: (267) [system] '$COMMENT'(";;                 (match $kb", 1331, 0)\=@='$COMMENT'(";;                 (match $kb", 1331, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (match $kb", 1331, 0), _280040)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;                 (match $kb", 1331, 0), _112842))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                 (match $kb", 1331, 0), _112842))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;                 (match $kb", 1331, 0), _112842))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                 (match $kb", 1331, 0), _112842))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (match $kb", 1331, 0), _112842)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (match $kb", 1331, 0), _112842)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;                 (match $kb", 1331, 0), _307946))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                 (match $kb", 1331, 0), _307946))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;                 (match $kb", 1331, 0), _307946)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                 (match $kb", 1331, 0), _307946)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;                 (match $kb", 1331, 0), _307946)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0)))
   Call: (267) [system] '$COMMENT'(";;                 (match $kb", 1331, 0)\=@='$COMMENT'(";;                 (match $kb", 1331, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (match $kb", 1331, 0), _112842)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0)))
   Call: (261) [system] '$COMMENT'(";;                 (match $kb", 1331, 0)\=@='$COMMENT'(";;                 (match $kb", 1331, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (match $kb", 1331, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (match $kb", 1331, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (match $kb", 1331, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (match $kb", 1331, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (match $kb", 1331, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;                 (match $kb", 1331, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;                 (match $kb", 1331, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;                 (match $kb", 1331, 0), _336724, [], _336726)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;                 (match $kb", 1331, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                 (match $kb", 1331, 0), _336724, [], _336726)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                 (match $kb", 1331, 0), _336724, [], _336726)
   Call: (258) [system] atom('$COMMENT'(";;                 (match $kb", 1331, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                 (match $kb", 1331, 0), _336724, [], _336726)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                 (match $kb", 1331, 0), _336724, [], _336726)
   Call: (258) [system] compound('$COMMENT'(";;                 (match $kb", 1331, 0))
   Exit: (258) [system] compound('$COMMENT'(";;                 (match $kb", 1331, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;                 (match $kb", 1331, 0), _346040, _346042)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT', [";;                 (match $kb", 1331, 0])
^  Call: (258) [user] subst_vars([";;                 (match $kb", 1331, 0], _347926, [], _336726)
^  Unify: (258) [user] subst_vars([";;                 (match $kb", 1331, 0], [";;                 (match $kb", 1331, 0], [], [])
   Call: (259) [system] var([";;                 (match $kb", 1331, 0])
^  Redo: (258) [user] subst_vars([";;                 (match $kb", 1331, 0], _347926, [], _336726)
^  Unify: (258) [user] subst_vars([";;                 (match $kb", 1331, 0], [_351662|_351664], [], _336726)
^  Call: (259) [user] subst_vars(";;                 (match $kb", _351662, [], _352602)
^  Unify: (259) [user] subst_vars(";;                 (match $kb", ";;                 (match $kb", [], [])
   Call: (260) [system] var(";;                 (match $kb")
^  Redo: (259) [user] subst_vars(";;                 (match $kb", _351662, [], _352602)
^  Unify: (259) [user] subst_vars(";;                 (match $kb", _351662, [], _352602)
   Call: (260) [system] atom(";;                 (match $kb")
^  Redo: (259) [user] subst_vars(";;                 (match $kb", _351662, [], _352602)
^  Unify: (259) [user] subst_vars(";;                 (match $kb", _351662, [], _352602)
   Call: (260) [system] compound(";;                 (match $kb")
^  Redo: (259) [user] subst_vars(";;                 (match $kb", _351662, [], _352602)
^  Unify: (259) [user] subst_vars(";;                 (match $kb", ";;                 (match $kb", [], [])
^  Exit: (259) [user] subst_vars(";;                 (match $kb", ";;                 (match $kb", [], [])
^  Call: (259) [user] subst_vars([1331, 0], _351664, [], _336726)
^  Unify: (259) [user] subst_vars([1331, 0], [1331, 0], [], [])
   Call: (260) [system] var([1331, 0])
^  Redo: (259) [user] subst_vars([1331, 0], _351664, [], _336726)
^  Unify: (259) [user] subst_vars([1331, 0], [_367534|_367536], [], _336726)
^  Call: (260) [user] subst_vars(1331, _367534, [], _368474)
^  Unify: (260) [user] subst_vars(1331, 1331, [], [])
   Call: (261) [system] var(1331)
^  Redo: (260) [user] subst_vars(1331, _367534, [], _368474)
^  Unify: (260) [user] subst_vars(1331, _367534, [], _368474)
   Call: (261) [system] atom(1331)
^  Redo: (260) [user] subst_vars(1331, _367534, [], _368474)
^  Unify: (260) [user] subst_vars(1331, _367534, [], _368474)
   Call: (261) [system] compound(1331)
^  Redo: (260) [user] subst_vars(1331, _367534, [], _368474)
^  Unify: (260) [user] subst_vars(1331, 1331, [], [])
^  Exit: (260) [user] subst_vars(1331, 1331, [], [])
^  Call: (260) [user] subst_vars([0], _367536, [], _336726)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _367536, [], _336726)
^  Unify: (260) [user] subst_vars([0], [_383406|_383408], [], _336726)
^  Call: (261) [user] subst_vars(0, _383406, [], _384346)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _383406, [], _384346)
^  Unify: (261) [user] subst_vars(0, _383406, [], _384346)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _383406, [], _384346)
^  Unify: (261) [user] subst_vars(0, _383406, [], _384346)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _383406, [], _384346)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _383408, [], _336726)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _383408, [], _336726)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1331, 0], [1331, 0], [], [])
^  Exit: (258) [user] subst_vars([";;                 (match $kb", 1331, 0], [";;                 (match $kb", 1331, 0], [], [])
   Call: (258) [system] compound_name_arguments(_336724, '$COMMENT', [";;                 (match $kb", 1331, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT', [";;                 (match $kb", 1331, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;                 (match $kb", 1331, 0), '$COMMENT'(";;                 (match $kb", 1331, 0), [], [])
   Call: (257) [system] _406764=metta_file_buffer(+, '$COMMENT'(";;                 (match $kb", 1331, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;                 (match $kb", 1331, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;                 (match $kb", 1331, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                 (match $kb", 1331, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                 (match $kb", 1331, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (match $kb", 1331, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (match $kb", 1331, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (match $kb", 1331, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (match $kb", 1331, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1332, 0, 47863, '$COMMENT'(";;                   ;; Premises", 1332, 0), '$stream_position'(47863, 1332, 0, 47877)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   ;; Premises", 1332, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   ;; Premises", 1332, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;                   ;; Premises", 1332, 0), _459488))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                   ;; Premises", 1332, 0), _459488))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;                   ;; Premises", 1332, 0), _459488)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                   ;; Premises", 1332, 0), _459488)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;                   ;; Premises", 1332, 0), _459488)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;                   ;; Premises", 1332, 0), _459488)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;                   ;; Premises", 1332, 0), _465100))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                   ;; Premises", 1332, 0), _465100))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;                   ;; Premises", 1332, 0), _465100))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                   ;; Premises", 1332, 0), _465100))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   ;; Premises", 1332, 0), _465100)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   ;; Premises", 1332, 0), _465100)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;                   ;; Premises", 1332, 0), _470686))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                   ;; Premises", 1332, 0), _470686))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;                   ;; Premises", 1332, 0), _470686)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                   ;; Premises", 1332, 0), _470686)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Premises", 1332, 0), _470686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Premises", 1332, 0), _470686)
   Call: (270) [system] var('$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Premises", 1332, 0), _470686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Premises", 1332, 0), '$VAR'(_478146))
   Call: (270) [system] atom('$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Premises", 1332, 0), _470686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Premises", 1332, 0), _470686)
   Call: (270) [system] '$COMMENT'(";;                   ;; Premises", 1332, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Premises", 1332, 0), _470686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Premises", 1332, 0), _470686)
   Call: (270) [system] '$COMMENT'(";;                   ;; Premises", 1332, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Premises", 1332, 0), _470686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Premises", 1332, 0), _470686)
   Call: (270) [system] '$COMMENT'(";;                   ;; Premises", 1332, 0)==[_487426, _487432]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Premises", 1332, 0), _470686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Premises", 1332, 0), _470686)
   Call: (270) [system] is_list('$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Premises", 1332, 0), _470686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Premises", 1332, 0), _470686)
   Call: (270) [system] string('$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Premises", 1332, 0), _470686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Premises", 1332, 0), _470686)
   Call: (270) [system] compound('$COMMENT'(";;                   ;; Premises", 1332, 0))
   Exit: (270) [system] compound('$COMMENT'(";;                   ;; Premises", 1332, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;                   ;; Premises", 1332, 0), _497628, _497630)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT', [";;                   ;; Premises", 1332, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;                   ;; Premises", 1332, 0], _501370)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;                   ;; Premises", 1332, 0], _501370)
   Call: (271) [apply] apply:maplist_([";;                   ;; Premises", 1332, 0], _501370, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;                   ;; Premises", 1332, 0], [_504188|_504190], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;                   ;; Premises", _504188)
^  Unify: (272) [user] mfix_vars1(";;                   ;; Premises", _504188)
   Call: (273) [system] var(";;                   ;; Premises")
^  Redo: (272) [user] mfix_vars1(";;                   ;; Premises", _504188)
^  Unify: (272) [user] mfix_vars1(";;                   ;; Premises", '$VAR'(_508834))
   Call: (273) [system] atom(";;                   ;; Premises")
^  Redo: (272) [user] mfix_vars1(";;                   ;; Premises", _504188)
^  Unify: (272) [user] mfix_vars1(";;                   ;; Premises", _504188)
   Call: (273) [system] ";;                   ;; Premises"==true
^  Redo: (272) [user] mfix_vars1(";;                   ;; Premises", _504188)
^  Unify: (272) [user] mfix_vars1(";;                   ;; Premises", _504188)
   Call: (273) [system] ";;                   ;; Premises"==false
^  Redo: (272) [user] mfix_vars1(";;                   ;; Premises", _504188)
^  Unify: (272) [user] mfix_vars1(";;                   ;; Premises", _504188)
   Call: (273) [system] ";;                   ;; Premises"==[_518114, _518120]
^  Redo: (272) [user] mfix_vars1(";;                   ;; Premises", _504188)
^  Unify: (272) [user] mfix_vars1(";;                   ;; Premises", _504188)
   Call: (273) [system] is_list(";;                   ;; Premises")
^  Redo: (272) [user] mfix_vars1(";;                   ;; Premises", _504188)
^  Unify: (272) [user] mfix_vars1(";;                   ;; Premises", _504188)
   Call: (273) [system] string(";;                   ;; Premises")
   Exit: (273) [system] string(";;                   ;; Premises")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;                   ;; Premises", _6030)
^  Unify: (272) [user] mfix_vars1(";;                   ;; Premises", _6030)
   Call: (273) [system] compound(";;                   ;; Premises")
^  Redo: (272) [user] mfix_vars1(";;                   ;; Premises", _6030)
^  Unify: (272) [user] mfix_vars1(";;                   ;; Premises", _6030)
^  Call: (273) [user] symbol(";;                   ;; Premises")
^  Unify: (273) [user] symbol(";;                   ;; Premises")
   Call: (274) [system] atom(";;                   ;; Premises")
   Fail: (274) [system] atom(";;                   ;; Premises")
^  Fail: (273) [user] symbol(";;                   ;; Premises")
^  Redo: (272) [user] mfix_vars1(";;                   ;; Premises", _6030)
   Call: (273) [system] ";;                   ;; Premises"=_6030
   Exit: (273) [system] ";;                   ;; Premises"=";;                   ;; Premises"
^  Exit: (272) [user] mfix_vars1(";;                   ;; Premises", ";;                   ;; Premises")
   Call: (272) [apply] apply:maplist_([1332, 0], _6032, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1332, 0], [_24278|_24280], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1332, _24278)
^  Unify: (273) [user] mfix_vars1(1332, _24278)
   Call: (274) [system] var(1332)
^  Redo: (273) [user] mfix_vars1(1332, _24278)
^  Unify: (273) [user] mfix_vars1(1332, '$VAR'(_28924))
   Call: (274) [system] atom(1332)
^  Redo: (273) [user] mfix_vars1(1332, _24278)
^  Unify: (273) [user] mfix_vars1(1332, _24278)
   Call: (274) [system] 1332==true
^  Redo: (273) [user] mfix_vars1(1332, _24278)
^  Unify: (273) [user] mfix_vars1(1332, _24278)
   Call: (274) [system] 1332==false
^  Redo: (273) [user] mfix_vars1(1332, _24278)
^  Unify: (273) [user] mfix_vars1(1332, _24278)
   Call: (274) [system] 1332==[_38204, _38210]
^  Redo: (273) [user] mfix_vars1(1332, _24278)
^  Unify: (273) [user] mfix_vars1(1332, _24278)
   Call: (274) [system] is_list(1332)
^  Redo: (273) [user] mfix_vars1(1332, _24278)
^  Unify: (273) [user] mfix_vars1(1332, _24278)
   Call: (274) [system] string(1332)
^  Redo: (273) [user] mfix_vars1(1332, _24278)
^  Unify: (273) [user] mfix_vars1(1332, _24278)
   Call: (274) [system] compound(1332)
^  Redo: (273) [user] mfix_vars1(1332, _24278)
^  Unify: (273) [user] mfix_vars1(1332, _24278)
^  Call: (274) [user] symbol(1332)
^  Unify: (274) [user] symbol(1332)
   Call: (275) [system] atom(1332)
   Fail: (275) [system] atom(1332)
^  Fail: (274) [user] symbol(1332)
^  Redo: (273) [user] mfix_vars1(1332, _24278)
   Call: (274) [system] 1332=_24278
   Exit: (274) [system] 1332=1332
^  Exit: (273) [user] mfix_vars1(1332, 1332)
   Call: (273) [apply] apply:maplist_([0], _24280, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_58604|_58606], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _58604)
^  Unify: (274) [user] mfix_vars1(0, _58604)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _58604)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_63250))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _58604)
^  Unify: (274) [user] mfix_vars1(0, _58604)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _58604)
^  Unify: (274) [user] mfix_vars1(0, _58604)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _58604)
^  Unify: (274) [user] mfix_vars1(0, _58604)
   Call: (275) [system] 0==[_72530, _72536]
^  Redo: (274) [user] mfix_vars1(0, _58604)
^  Unify: (274) [user] mfix_vars1(0, _58604)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _58604)
^  Unify: (274) [user] mfix_vars1(0, _58604)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _58604)
^  Unify: (274) [user] mfix_vars1(0, _58604)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _58604)
^  Unify: (274) [user] mfix_vars1(0, _58604)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _58604)
   Call: (275) [system] 0=_58604
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _58606, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1332, 0], [1332, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;                   ;; Premises", 1332, 0], [";;                   ;; Premises", 1332, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;                   ;; Premises", 1332, 0], [";;                   ;; Premises", 1332, 0])
   Call: (270) [system] compound_name_arguments(_5984, '$COMMENT', [";;                   ;; Premises", 1332, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT', [";;                   ;; Premises", 1332, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0)))
   Call: (267) [system] '$COMMENT'(";;                   ;; Premises", 1332, 0)\=@='$COMMENT'(";;                   ;; Premises", 1332, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   ;; Premises", 1332, 0), _5970)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;                   ;; Premises", 1332, 0), _108778))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                   ;; Premises", 1332, 0), _108778))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;                   ;; Premises", 1332, 0), _108778))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                   ;; Premises", 1332, 0), _108778))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   ;; Premises", 1332, 0), _108778)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   ;; Premises", 1332, 0), _108778)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;                   ;; Premises", 1332, 0), _114364))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                   ;; Premises", 1332, 0), _114364))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;                   ;; Premises", 1332, 0), _114364)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                   ;; Premises", 1332, 0), _114364)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;                   ;; Premises", 1332, 0), _114364)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0)))
   Call: (267) [system] '$COMMENT'(";;                   ;; Premises", 1332, 0)\=@='$COMMENT'(";;                   ;; Premises", 1332, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   ;; Premises", 1332, 0), _108778)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;                   ;; Premises", 1332, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                   ;; Premises", 1332, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;                   ;; Premises", 1332, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                   ;; Premises", 1332, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   ;; Premises", 1332, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   ;; Premises", 1332, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;                   ;; Premises", 1332, 0), _136684))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                   ;; Premises", 1332, 0), _136684))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;                   ;; Premises", 1332, 0), _136684)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                   ;; Premises", 1332, 0), _136684)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;                   ;; Premises", 1332, 0), _136684)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0)))
   Call: (267) [system] '$COMMENT'(";;                   ;; Premises", 1332, 0)\=@='$COMMENT'(";;                   ;; Premises", 1332, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   ;; Premises", 1332, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0)))
   Call: (261) [system] '$COMMENT'(";;                   ;; Premises", 1332, 0)\=@='$COMMENT'(";;                   ;; Premises", 1332, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   ;; Premises", 1332, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                   ;; Premises", 1332, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                   ;; Premises", 1332, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                   ;; Premises", 1332, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                   ;; Premises", 1332, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;                   ;; Premises", 1332, 0), _165462, [], _165464)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                   ;; Premises", 1332, 0), _165462, [], _165464)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                   ;; Premises", 1332, 0), _165462, [], _165464)
   Call: (258) [system] atom('$COMMENT'(";;                   ;; Premises", 1332, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                   ;; Premises", 1332, 0), _165462, [], _165464)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                   ;; Premises", 1332, 0), _165462, [], _165464)
   Call: (258) [system] compound('$COMMENT'(";;                   ;; Premises", 1332, 0))
   Exit: (258) [system] compound('$COMMENT'(";;                   ;; Premises", 1332, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;                   ;; Premises", 1332, 0), _174778, _174780)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT', [";;                   ;; Premises", 1332, 0])
^  Call: (258) [user] subst_vars([";;                   ;; Premises", 1332, 0], _176664, [], _165464)
^  Unify: (258) [user] subst_vars([";;                   ;; Premises", 1332, 0], [";;                   ;; Premises", 1332, 0], [], [])
   Call: (259) [system] var([";;                   ;; Premises", 1332, 0])
^  Redo: (258) [user] subst_vars([";;                   ;; Premises", 1332, 0], _176664, [], _165464)
^  Unify: (258) [user] subst_vars([";;                   ;; Premises", 1332, 0], [_180400|_180402], [], _165464)
^  Call: (259) [user] subst_vars(";;                   ;; Premises", _180400, [], _181340)
^  Unify: (259) [user] subst_vars(";;                   ;; Premises", ";;                   ;; Premises", [], [])
   Call: (260) [system] var(";;                   ;; Premises")
^  Redo: (259) [user] subst_vars(";;                   ;; Premises", _180400, [], _181340)
^  Unify: (259) [user] subst_vars(";;                   ;; Premises", _180400, [], _181340)
   Call: (260) [system] atom(";;                   ;; Premises")
^  Redo: (259) [user] subst_vars(";;                   ;; Premises", _180400, [], _181340)
^  Unify: (259) [user] subst_vars(";;                   ;; Premises", _180400, [], _181340)
   Call: (260) [system] compound(";;                   ;; Premises")
^  Redo: (259) [user] subst_vars(";;                   ;; Premises", _180400, [], _181340)
^  Unify: (259) [user] subst_vars(";;                   ;; Premises", ";;                   ;; Premises", [], [])
^  Exit: (259) [user] subst_vars(";;                   ;; Premises", ";;                   ;; Premises", [], [])
^  Call: (259) [user] subst_vars([1332, 0], _180402, [], _165464)
^  Unify: (259) [user] subst_vars([1332, 0], [1332, 0], [], [])
   Call: (260) [system] var([1332, 0])
^  Redo: (259) [user] subst_vars([1332, 0], _180402, [], _165464)
^  Unify: (259) [user] subst_vars([1332, 0], [_196272|_196274], [], _165464)
^  Call: (260) [user] subst_vars(1332, _196272, [], _197212)
^  Unify: (260) [user] subst_vars(1332, 1332, [], [])
   Call: (261) [system] var(1332)
^  Redo: (260) [user] subst_vars(1332, _196272, [], _197212)
^  Unify: (260) [user] subst_vars(1332, _196272, [], _197212)
   Call: (261) [system] atom(1332)
^  Redo: (260) [user] subst_vars(1332, _196272, [], _197212)
^  Unify: (260) [user] subst_vars(1332, _196272, [], _197212)
   Call: (261) [system] compound(1332)
^  Redo: (260) [user] subst_vars(1332, _196272, [], _197212)
^  Unify: (260) [user] subst_vars(1332, 1332, [], [])
^  Exit: (260) [user] subst_vars(1332, 1332, [], [])
^  Call: (260) [user] subst_vars([0], _196274, [], _165464)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _196274, [], _165464)
^  Unify: (260) [user] subst_vars([0], [_212144|_212146], [], _165464)
^  Call: (261) [user] subst_vars(0, _212144, [], _213084)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _212144, [], _213084)
^  Unify: (261) [user] subst_vars(0, _212144, [], _213084)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _212144, [], _213084)
^  Unify: (261) [user] subst_vars(0, _212144, [], _213084)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _212144, [], _213084)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _212146, [], _165464)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _212146, [], _165464)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1332, 0], [1332, 0], [], [])
^  Exit: (258) [user] subst_vars([";;                   ;; Premises", 1332, 0], [";;                   ;; Premises", 1332, 0], [], [])
   Call: (258) [system] compound_name_arguments(_165462, '$COMMENT', [";;                   ;; Premises", 1332, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT', [";;                   ;; Premises", 1332, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;                   ;; Premises", 1332, 0), '$COMMENT'(";;                   ;; Premises", 1332, 0), [], [])
   Call: (257) [system] _235502=metta_file_buffer(+, '$COMMENT'(";;                   ;; Premises", 1332, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;                   ;; Premises", 1332, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;                   ;; Premises", 1332, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                   ;; Premises", 1332, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                   ;; Premises", 1332, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                   ;; Premises", 1332, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                   ;; Premises", 1332, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                   ;; Premises", 1332, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                   ;; Premises", 1332, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1333, 0, 47896, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$stream_position'(47896, 1333, 0, 47910)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _288226))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _288226))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _288226)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _288226)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _288226)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _288226)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _293838))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _293838))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _293838))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _293838))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _293838)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _293838)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _299424))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _299424))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _299424)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _299424)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _299424)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _299424)
   Call: (270) [system] var('$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _299424)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$VAR'(_306884))
   Call: (270) [system] atom('$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _299424)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _299424)
   Call: (270) [system] '$COMMENT'(";;                   (, $pq $qr)", 1333, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _299424)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _299424)
   Call: (270) [system] '$COMMENT'(";;                   (, $pq $qr)", 1333, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _299424)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _299424)
   Call: (270) [system] '$COMMENT'(";;                   (, $pq $qr)", 1333, 0)==[_316164, _316170]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _299424)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _299424)
   Call: (270) [system] is_list('$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _299424)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _299424)
   Call: (270) [system] string('$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _299424)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _299424)
   Call: (270) [system] compound('$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
   Exit: (270) [system] compound('$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _326366, _326368)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT', [";;                   (, $pq $qr)", 1333, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;                   (, $pq $qr)", 1333, 0], _330108)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;                   (, $pq $qr)", 1333, 0], _330108)
   Call: (271) [apply] apply:maplist_([";;                   (, $pq $qr)", 1333, 0], _330108, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;                   (, $pq $qr)", 1333, 0], [_332926|_332928], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;                   (, $pq $qr)", _332926)
^  Unify: (272) [user] mfix_vars1(";;                   (, $pq $qr)", _332926)
   Call: (273) [system] var(";;                   (, $pq $qr)")
^  Redo: (272) [user] mfix_vars1(";;                   (, $pq $qr)", _332926)
^  Unify: (272) [user] mfix_vars1(";;                   (, $pq $qr)", '$VAR'(_337572))
   Call: (273) [system] atom(";;                   (, $pq $qr)")
^  Redo: (272) [user] mfix_vars1(";;                   (, $pq $qr)", _332926)
^  Unify: (272) [user] mfix_vars1(";;                   (, $pq $qr)", _332926)
   Call: (273) [system] ";;                   (, $pq $qr)"==true
^  Redo: (272) [user] mfix_vars1(";;                   (, $pq $qr)", _332926)
^  Unify: (272) [user] mfix_vars1(";;                   (, $pq $qr)", _332926)
   Call: (273) [system] ";;                   (, $pq $qr)"==false
^  Redo: (272) [user] mfix_vars1(";;                   (, $pq $qr)", _332926)
^  Unify: (272) [user] mfix_vars1(";;                   (, $pq $qr)", _332926)
   Call: (273) [system] ";;                   (, $pq $qr)"==[_346852, _346858]
^  Redo: (272) [user] mfix_vars1(";;                   (, $pq $qr)", _332926)
^  Unify: (272) [user] mfix_vars1(";;                   (, $pq $qr)", _332926)
   Call: (273) [system] is_list(";;                   (, $pq $qr)")
^  Redo: (272) [user] mfix_vars1(";;                   (, $pq $qr)", _332926)
^  Unify: (272) [user] mfix_vars1(";;                   (, $pq $qr)", _332926)
   Call: (273) [system] string(";;                   (, $pq $qr)")
   Exit: (273) [system] string(";;                   (, $pq $qr)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;                   (, $pq $qr)", _332926)
^  Unify: (272) [user] mfix_vars1(";;                   (, $pq $qr)", _332926)
   Call: (273) [system] compound(";;                   (, $pq $qr)")
^  Redo: (272) [user] mfix_vars1(";;                   (, $pq $qr)", _332926)
^  Unify: (272) [user] mfix_vars1(";;                   (, $pq $qr)", _332926)
^  Call: (273) [user] symbol(";;                   (, $pq $qr)")
^  Unify: (273) [user] symbol(";;                   (, $pq $qr)")
   Call: (274) [system] atom(";;                   (, $pq $qr)")
   Fail: (274) [system] atom(";;                   (, $pq $qr)")
^  Fail: (273) [user] symbol(";;                   (, $pq $qr)")
^  Redo: (272) [user] mfix_vars1(";;                   (, $pq $qr)", _332926)
   Call: (273) [system] ";;                   (, $pq $qr)"=_332926
   Exit: (273) [system] ";;                   (, $pq $qr)"=";;                   (, $pq $qr)"
^  Exit: (272) [user] mfix_vars1(";;                   (, $pq $qr)", ";;                   (, $pq $qr)")
   Call: (272) [apply] apply:maplist_([1333, 0], _332928, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1333, 0], [_370924|_370926], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1333, _370924)
^  Unify: (273) [user] mfix_vars1(1333, _370924)
   Call: (274) [system] var(1333)
^  Redo: (273) [user] mfix_vars1(1333, _370924)
^  Unify: (273) [user] mfix_vars1(1333, '$VAR'(_375570))
   Call: (274) [system] atom(1333)
^  Redo: (273) [user] mfix_vars1(1333, _370924)
^  Unify: (273) [user] mfix_vars1(1333, _370924)
   Call: (274) [system] 1333==true
^  Redo: (273) [user] mfix_vars1(1333, _370924)
^  Unify: (273) [user] mfix_vars1(1333, _370924)
   Call: (274) [system] 1333==false
^  Redo: (273) [user] mfix_vars1(1333, _370924)
^  Unify: (273) [user] mfix_vars1(1333, _370924)
   Call: (274) [system] 1333==[_384850, _384856]
^  Redo: (273) [user] mfix_vars1(1333, _370924)
^  Unify: (273) [user] mfix_vars1(1333, _370924)
   Call: (274) [system] is_list(1333)
^  Redo: (273) [user] mfix_vars1(1333, _370924)
^  Unify: (273) [user] mfix_vars1(1333, _370924)
   Call: (274) [system] string(1333)
^  Redo: (273) [user] mfix_vars1(1333, _370924)
^  Unify: (273) [user] mfix_vars1(1333, _370924)
   Call: (274) [system] compound(1333)
^  Redo: (273) [user] mfix_vars1(1333, _370924)
^  Unify: (273) [user] mfix_vars1(1333, _370924)
^  Call: (274) [user] symbol(1333)
^  Unify: (274) [user] symbol(1333)
   Call: (275) [system] atom(1333)
   Fail: (275) [system] atom(1333)
^  Fail: (274) [user] symbol(1333)
^  Redo: (273) [user] mfix_vars1(1333, _370924)
   Call: (274) [system] 1333=_370924
   Exit: (274) [system] 1333=1333
^  Exit: (273) [user] mfix_vars1(1333, 1333)
   Call: (273) [apply] apply:maplist_([0], _370926, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_405250|_405252], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _405250)
^  Unify: (274) [user] mfix_vars1(0, _405250)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _405250)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_409896))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _405250)
^  Unify: (274) [user] mfix_vars1(0, _405250)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _405250)
^  Unify: (274) [user] mfix_vars1(0, _405250)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _405250)
^  Unify: (274) [user] mfix_vars1(0, _405250)
   Call: (275) [system] 0==[_419176, _419182]
^  Redo: (274) [user] mfix_vars1(0, _405250)
^  Unify: (274) [user] mfix_vars1(0, _405250)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _405250)
^  Unify: (274) [user] mfix_vars1(0, _405250)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _405250)
^  Unify: (274) [user] mfix_vars1(0, _405250)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _405250)
^  Unify: (274) [user] mfix_vars1(0, _405250)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _405250)
   Call: (275) [system] 0=_405250
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _405252, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1333, 0], [1333, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;                   (, $pq $qr)", 1333, 0], [";;                   (, $pq $qr)", 1333, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;                   (, $pq $qr)", 1333, 0], [";;                   (, $pq $qr)", 1333, 0])
   Call: (270) [system] compound_name_arguments(_299424, '$COMMENT', [";;                   (, $pq $qr)", 1333, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT', [";;                   (, $pq $qr)", 1333, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0)))
   Call: (267) [system] '$COMMENT'(";;                   (, $pq $qr)", 1333, 0)\=@='$COMMENT'(";;                   (, $pq $qr)", 1333, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _293838)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _455424))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _455424))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _455424))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _455424))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _455424)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _455424)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _461010))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _461010))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _461010)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _461010)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _461010)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0)))
   Call: (267) [system] '$COMMENT'(";;                   (, $pq $qr)", 1333, 0)\=@='$COMMENT'(";;                   (, $pq $qr)", 1333, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _455424)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _288226))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _288226))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _288226))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _288226))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _288226)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _288226)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _483330))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _483330))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _483330)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _483330)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _483330)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0)))
   Call: (267) [system] '$COMMENT'(";;                   (, $pq $qr)", 1333, 0)\=@='$COMMENT'(";;                   (, $pq $qr)", 1333, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _288226)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0)))
   Call: (261) [system] '$COMMENT'(";;                   (, $pq $qr)", 1333, 0)\=@='$COMMENT'(";;                   (, $pq $qr)", 1333, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _512108, [], _512110)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _512108, [], _512110)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _512108, [], _512110)
   Call: (258) [system] atom('$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _512108, [], _512110)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _512108, [], _512110)
   Call: (258) [system] compound('$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
   Exit: (258) [system] compound('$COMMENT'(";;                   (, $pq $qr)", 1333, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), _521424, _521426)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT', [";;                   (, $pq $qr)", 1333, 0])
^  Call: (258) [user] subst_vars([";;                   (, $pq $qr)", 1333, 0], _5972, [], _5946)
^  Unify: (258) [user] subst_vars([";;                   (, $pq $qr)", 1333, 0], [";;                   (, $pq $qr)", 1333, 0], [], [])
   Call: (259) [system] var([";;                   (, $pq $qr)", 1333, 0])
^  Redo: (258) [user] subst_vars([";;                   (, $pq $qr)", 1333, 0], _5972, [], _5946)
^  Unify: (258) [user] subst_vars([";;                   (, $pq $qr)", 1333, 0], [_9126|_9128], [], _5946)
^  Call: (259) [user] subst_vars(";;                   (, $pq $qr)", _9126, [], _10066)
^  Unify: (259) [user] subst_vars(";;                   (, $pq $qr)", ";;                   (, $pq $qr)", [], [])
   Call: (260) [system] var(";;                   (, $pq $qr)")
^  Redo: (259) [user] subst_vars(";;                   (, $pq $qr)", _9126, [], _10066)
^  Unify: (259) [user] subst_vars(";;                   (, $pq $qr)", _9126, [], _10066)
   Call: (260) [system] atom(";;                   (, $pq $qr)")
^  Redo: (259) [user] subst_vars(";;                   (, $pq $qr)", _9126, [], _10066)
^  Unify: (259) [user] subst_vars(";;                   (, $pq $qr)", _9126, [], _10066)
   Call: (260) [system] compound(";;                   (, $pq $qr)")
^  Redo: (259) [user] subst_vars(";;                   (, $pq $qr)", _9126, [], _10066)
^  Unify: (259) [user] subst_vars(";;                   (, $pq $qr)", ";;                   (, $pq $qr)", [], [])
^  Exit: (259) [user] subst_vars(";;                   (, $pq $qr)", ";;                   (, $pq $qr)", [], [])
^  Call: (259) [user] subst_vars([1333, 0], _9128, [], _5946)
^  Unify: (259) [user] subst_vars([1333, 0], [1333, 0], [], [])
   Call: (260) [system] var([1333, 0])
^  Redo: (259) [user] subst_vars([1333, 0], _9128, [], _5946)
^  Unify: (259) [user] subst_vars([1333, 0], [_24998|_25000], [], _5946)
^  Call: (260) [user] subst_vars(1333, _24998, [], _25938)
^  Unify: (260) [user] subst_vars(1333, 1333, [], [])
   Call: (261) [system] var(1333)
^  Redo: (260) [user] subst_vars(1333, _24998, [], _25938)
^  Unify: (260) [user] subst_vars(1333, _24998, [], _25938)
   Call: (261) [system] atom(1333)
^  Redo: (260) [user] subst_vars(1333, _24998, [], _25938)
^  Unify: (260) [user] subst_vars(1333, _24998, [], _25938)
   Call: (261) [system] compound(1333)
^  Redo: (260) [user] subst_vars(1333, _24998, [], _25938)
^  Unify: (260) [user] subst_vars(1333, 1333, [], [])
^  Exit: (260) [user] subst_vars(1333, 1333, [], [])
^  Call: (260) [user] subst_vars([0], _25000, [], _5946)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _25000, [], _5946)
^  Unify: (260) [user] subst_vars([0], [_40870|_40872], [], _5946)
^  Call: (261) [user] subst_vars(0, _40870, [], _41810)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _40870, [], _41810)
^  Unify: (261) [user] subst_vars(0, _40870, [], _41810)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _40870, [], _41810)
^  Unify: (261) [user] subst_vars(0, _40870, [], _41810)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _40870, [], _41810)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _40872, [], _5946)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _40872, [], _5946)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1333, 0], [1333, 0], [], [])
^  Exit: (258) [user] subst_vars([";;                   (, $pq $qr)", 1333, 0], [";;                   (, $pq $qr)", 1333, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5944, '$COMMENT', [";;                   (, $pq $qr)", 1333, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT', [";;                   (, $pq $qr)", 1333, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;                   (, $pq $qr)", 1333, 0), '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), [], [])
   Call: (257) [system] _64228=metta_file_buffer(+, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                   (, $pq $qr)", 1333, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1334, 0, 47929, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$stream_position'(47929, 1334, 0, 47943)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _116952))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _116952))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _116952)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _116952)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _116952)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _116952)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _122564))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _122564))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _122564))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _122564))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _122564)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _122564)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _128150))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _128150))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _128150)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _128150)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _128150)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _128150)
   Call: (270) [system] var('$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _128150)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$VAR'(_135610))
   Call: (270) [system] atom('$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _128150)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _128150)
   Call: (270) [system] '$COMMENT'(";;                   ;; Conclusion", 1334, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _128150)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _128150)
   Call: (270) [system] '$COMMENT'(";;                   ;; Conclusion", 1334, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _128150)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _128150)
   Call: (270) [system] '$COMMENT'(";;                   ;; Conclusion", 1334, 0)==[_144890, _144896]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _128150)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _128150)
   Call: (270) [system] is_list('$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _128150)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _128150)
   Call: (270) [system] string('$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _128150)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _128150)
   Call: (270) [system] compound('$COMMENT'(";;                   ;; Conclusion", 1334, 0))
   Exit: (270) [system] compound('$COMMENT'(";;                   ;; Conclusion", 1334, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _155092, _155094)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT', [";;                   ;; Conclusion", 1334, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;                   ;; Conclusion", 1334, 0], _158834)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;                   ;; Conclusion", 1334, 0], _158834)
   Call: (271) [apply] apply:maplist_([";;                   ;; Conclusion", 1334, 0], _158834, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;                   ;; Conclusion", 1334, 0], [_161652|_161654], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;                   ;; Conclusion", _161652)
^  Unify: (272) [user] mfix_vars1(";;                   ;; Conclusion", _161652)
   Call: (273) [system] var(";;                   ;; Conclusion")
^  Redo: (272) [user] mfix_vars1(";;                   ;; Conclusion", _161652)
^  Unify: (272) [user] mfix_vars1(";;                   ;; Conclusion", '$VAR'(_166298))
   Call: (273) [system] atom(";;                   ;; Conclusion")
^  Redo: (272) [user] mfix_vars1(";;                   ;; Conclusion", _161652)
^  Unify: (272) [user] mfix_vars1(";;                   ;; Conclusion", _161652)
   Call: (273) [system] ";;                   ;; Conclusion"==true
^  Redo: (272) [user] mfix_vars1(";;                   ;; Conclusion", _161652)
^  Unify: (272) [user] mfix_vars1(";;                   ;; Conclusion", _161652)
   Call: (273) [system] ";;                   ;; Conclusion"==false
^  Redo: (272) [user] mfix_vars1(";;                   ;; Conclusion", _161652)
^  Unify: (272) [user] mfix_vars1(";;                   ;; Conclusion", _161652)
   Call: (273) [system] ";;                   ;; Conclusion"==[_175578, _175584]
^  Redo: (272) [user] mfix_vars1(";;                   ;; Conclusion", _161652)
^  Unify: (272) [user] mfix_vars1(";;                   ;; Conclusion", _161652)
   Call: (273) [system] is_list(";;                   ;; Conclusion")
^  Redo: (272) [user] mfix_vars1(";;                   ;; Conclusion", _161652)
^  Unify: (272) [user] mfix_vars1(";;                   ;; Conclusion", _161652)
   Call: (273) [system] string(";;                   ;; Conclusion")
   Exit: (273) [system] string(";;                   ;; Conclusion")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;                   ;; Conclusion", _161652)
^  Unify: (272) [user] mfix_vars1(";;                   ;; Conclusion", _161652)
   Call: (273) [system] compound(";;                   ;; Conclusion")
^  Redo: (272) [user] mfix_vars1(";;                   ;; Conclusion", _161652)
^  Unify: (272) [user] mfix_vars1(";;                   ;; Conclusion", _161652)
^  Call: (273) [user] symbol(";;                   ;; Conclusion")
^  Unify: (273) [user] symbol(";;                   ;; Conclusion")
   Call: (274) [system] atom(";;                   ;; Conclusion")
   Fail: (274) [system] atom(";;                   ;; Conclusion")
^  Fail: (273) [user] symbol(";;                   ;; Conclusion")
^  Redo: (272) [user] mfix_vars1(";;                   ;; Conclusion", _161652)
   Call: (273) [system] ";;                   ;; Conclusion"=_161652
   Exit: (273) [system] ";;                   ;; Conclusion"=";;                   ;; Conclusion"
^  Exit: (272) [user] mfix_vars1(";;                   ;; Conclusion", ";;                   ;; Conclusion")
   Call: (272) [apply] apply:maplist_([1334, 0], _161654, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1334, 0], [_199650|_199652], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1334, _199650)
^  Unify: (273) [user] mfix_vars1(1334, _199650)
   Call: (274) [system] var(1334)
^  Redo: (273) [user] mfix_vars1(1334, _199650)
^  Unify: (273) [user] mfix_vars1(1334, '$VAR'(_204296))
   Call: (274) [system] atom(1334)
^  Redo: (273) [user] mfix_vars1(1334, _199650)
^  Unify: (273) [user] mfix_vars1(1334, _199650)
   Call: (274) [system] 1334==true
^  Redo: (273) [user] mfix_vars1(1334, _199650)
^  Unify: (273) [user] mfix_vars1(1334, _199650)
   Call: (274) [system] 1334==false
^  Redo: (273) [user] mfix_vars1(1334, _199650)
^  Unify: (273) [user] mfix_vars1(1334, _199650)
   Call: (274) [system] 1334==[_213576, _213582]
^  Redo: (273) [user] mfix_vars1(1334, _199650)
^  Unify: (273) [user] mfix_vars1(1334, _199650)
   Call: (274) [system] is_list(1334)
^  Redo: (273) [user] mfix_vars1(1334, _199650)
^  Unify: (273) [user] mfix_vars1(1334, _199650)
   Call: (274) [system] string(1334)
^  Redo: (273) [user] mfix_vars1(1334, _199650)
^  Unify: (273) [user] mfix_vars1(1334, _199650)
   Call: (274) [system] compound(1334)
^  Redo: (273) [user] mfix_vars1(1334, _199650)
^  Unify: (273) [user] mfix_vars1(1334, _199650)
^  Call: (274) [user] symbol(1334)
^  Unify: (274) [user] symbol(1334)
   Call: (275) [system] atom(1334)
   Fail: (275) [system] atom(1334)
^  Fail: (274) [user] symbol(1334)
^  Redo: (273) [user] mfix_vars1(1334, _199650)
   Call: (274) [system] 1334=_199650
   Exit: (274) [system] 1334=1334
^  Exit: (273) [user] mfix_vars1(1334, 1334)
   Call: (273) [apply] apply:maplist_([0], _199652, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_233976|_233978], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _233976)
^  Unify: (274) [user] mfix_vars1(0, _233976)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _233976)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_238622))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _233976)
^  Unify: (274) [user] mfix_vars1(0, _233976)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _233976)
^  Unify: (274) [user] mfix_vars1(0, _233976)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _233976)
^  Unify: (274) [user] mfix_vars1(0, _233976)
   Call: (275) [system] 0==[_247902, _247908]
^  Redo: (274) [user] mfix_vars1(0, _233976)
^  Unify: (274) [user] mfix_vars1(0, _233976)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _233976)
^  Unify: (274) [user] mfix_vars1(0, _233976)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _233976)
^  Unify: (274) [user] mfix_vars1(0, _233976)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _233976)
^  Unify: (274) [user] mfix_vars1(0, _233976)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _233976)
   Call: (275) [system] 0=_233976
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _233978, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1334, 0], [1334, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;                   ;; Conclusion", 1334, 0], [";;                   ;; Conclusion", 1334, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;                   ;; Conclusion", 1334, 0], [";;                   ;; Conclusion", 1334, 0])
   Call: (270) [system] compound_name_arguments(_128150, '$COMMENT', [";;                   ;; Conclusion", 1334, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT', [";;                   ;; Conclusion", 1334, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0)))
   Call: (267) [system] '$COMMENT'(";;                   ;; Conclusion", 1334, 0)\=@='$COMMENT'(";;                   ;; Conclusion", 1334, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _122564)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _284150))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _284150))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _284150))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _284150))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _284150)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _284150)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _289736))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _289736))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _289736)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _289736)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _289736)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0)))
   Call: (267) [system] '$COMMENT'(";;                   ;; Conclusion", 1334, 0)\=@='$COMMENT'(";;                   ;; Conclusion", 1334, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _284150)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _116952))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _116952))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _116952))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _116952))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _116952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _116952)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _312056))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _312056))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _312056)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _312056)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _312056)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0)))
   Call: (267) [system] '$COMMENT'(";;                   ;; Conclusion", 1334, 0)\=@='$COMMENT'(";;                   ;; Conclusion", 1334, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _116952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0)))
   Call: (261) [system] '$COMMENT'(";;                   ;; Conclusion", 1334, 0)\=@='$COMMENT'(";;                   ;; Conclusion", 1334, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _340834, [], _340836)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _340834, [], _340836)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _340834, [], _340836)
   Call: (258) [system] atom('$COMMENT'(";;                   ;; Conclusion", 1334, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _340834, [], _340836)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _340834, [], _340836)
   Call: (258) [system] compound('$COMMENT'(";;                   ;; Conclusion", 1334, 0))
   Exit: (258) [system] compound('$COMMENT'(";;                   ;; Conclusion", 1334, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;                   ;; Conclusion", 1334, 0), _350150, _350152)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT', [";;                   ;; Conclusion", 1334, 0])
^  Call: (258) [user] subst_vars([";;                   ;; Conclusion", 1334, 0], _352036, [], _340836)
^  Unify: (258) [user] subst_vars([";;                   ;; Conclusion", 1334, 0], [";;                   ;; Conclusion", 1334, 0], [], [])
   Call: (259) [system] var([";;                   ;; Conclusion", 1334, 0])
^  Redo: (258) [user] subst_vars([";;                   ;; Conclusion", 1334, 0], _352036, [], _340836)
^  Unify: (258) [user] subst_vars([";;                   ;; Conclusion", 1334, 0], [_355772|_355774], [], _340836)
^  Call: (259) [user] subst_vars(";;                   ;; Conclusion", _355772, [], _356712)
^  Unify: (259) [user] subst_vars(";;                   ;; Conclusion", ";;                   ;; Conclusion", [], [])
   Call: (260) [system] var(";;                   ;; Conclusion")
^  Redo: (259) [user] subst_vars(";;                   ;; Conclusion", _355772, [], _356712)
^  Unify: (259) [user] subst_vars(";;                   ;; Conclusion", _355772, [], _356712)
   Call: (260) [system] atom(";;                   ;; Conclusion")
^  Redo: (259) [user] subst_vars(";;                   ;; Conclusion", _355772, [], _356712)
^  Unify: (259) [user] subst_vars(";;                   ;; Conclusion", _355772, [], _356712)
   Call: (260) [system] compound(";;                   ;; Conclusion")
^  Redo: (259) [user] subst_vars(";;                   ;; Conclusion", _355772, [], _356712)
^  Unify: (259) [user] subst_vars(";;                   ;; Conclusion", ";;                   ;; Conclusion", [], [])
^  Exit: (259) [user] subst_vars(";;                   ;; Conclusion", ";;                   ;; Conclusion", [], [])
^  Call: (259) [user] subst_vars([1334, 0], _355774, [], _340836)
^  Unify: (259) [user] subst_vars([1334, 0], [1334, 0], [], [])
   Call: (260) [system] var([1334, 0])
^  Redo: (259) [user] subst_vars([1334, 0], _355774, [], _340836)
^  Unify: (259) [user] subst_vars([1334, 0], [_371644|_371646], [], _340836)
^  Call: (260) [user] subst_vars(1334, _371644, [], _372584)
^  Unify: (260) [user] subst_vars(1334, 1334, [], [])
   Call: (261) [system] var(1334)
^  Redo: (260) [user] subst_vars(1334, _371644, [], _372584)
^  Unify: (260) [user] subst_vars(1334, _371644, [], _372584)
   Call: (261) [system] atom(1334)
^  Redo: (260) [user] subst_vars(1334, _371644, [], _372584)
^  Unify: (260) [user] subst_vars(1334, _371644, [], _372584)
   Call: (261) [system] compound(1334)
^  Redo: (260) [user] subst_vars(1334, _371644, [], _372584)
^  Unify: (260) [user] subst_vars(1334, 1334, [], [])
^  Exit: (260) [user] subst_vars(1334, 1334, [], [])
^  Call: (260) [user] subst_vars([0], _371646, [], _340836)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _371646, [], _340836)
^  Unify: (260) [user] subst_vars([0], [_387516|_387518], [], _340836)
^  Call: (261) [user] subst_vars(0, _387516, [], _388456)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _387516, [], _388456)
^  Unify: (261) [user] subst_vars(0, _387516, [], _388456)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _387516, [], _388456)
^  Unify: (261) [user] subst_vars(0, _387516, [], _388456)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _387516, [], _388456)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _387518, [], _340836)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _387518, [], _340836)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1334, 0], [1334, 0], [], [])
^  Exit: (258) [user] subst_vars([";;                   ;; Conclusion", 1334, 0], [";;                   ;; Conclusion", 1334, 0], [], [])
   Call: (258) [system] compound_name_arguments(_340834, '$COMMENT', [";;                   ;; Conclusion", 1334, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT', [";;                   ;; Conclusion", 1334, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;                   ;; Conclusion", 1334, 0), '$COMMENT'(";;                   ;; Conclusion", 1334, 0), [], [])
   Call: (257) [system] _410874=metta_file_buffer(+, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                   ;; Conclusion", 1334, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1335, 0, 47964, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$stream_position'(47964, 1335, 0, 47978)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _463598))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _463598))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _463598)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _463598)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _463598)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _463598)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _469210))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _469210))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _469210))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _469210))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _469210)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _469210)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _474796))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _474796))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _474796)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _474796)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _474796)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _474796)
   Call: (270) [system] var('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _474796)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$VAR'(_482256))
   Call: (270) [system] atom('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _474796)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _474796)
   Call: (270) [system] '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _474796)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _474796)
   Call: (270) [system] '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _474796)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _474796)
   Call: (270) [system] '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0)==[_491536, _491542]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _474796)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _474796)
   Call: (270) [system] is_list('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _474796)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _474796)
   Call: (270) [system] string('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _474796)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _474796)
   Call: (270) [system] compound('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
   Exit: (270) [system] compound('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _501738, _501740)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT', [";;                   (rule $pq $qr))))", 1335, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;                   (rule $pq $qr))))", 1335, 0], _505480)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;                   (rule $pq $qr))))", 1335, 0], _505480)
   Call: (271) [apply] apply:maplist_([";;                   (rule $pq $qr))))", 1335, 0], _505480, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;                   (rule $pq $qr))))", 1335, 0], [_508298|_508300], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;                   (rule $pq $qr))))", _508298)
^  Unify: (272) [user] mfix_vars1(";;                   (rule $pq $qr))))", _508298)
   Call: (273) [system] var(";;                   (rule $pq $qr))))")
^  Redo: (272) [user] mfix_vars1(";;                   (rule $pq $qr))))", _508298)
^  Unify: (272) [user] mfix_vars1(";;                   (rule $pq $qr))))", '$VAR'(_512944))
   Call: (273) [system] atom(";;                   (rule $pq $qr))))")
^  Redo: (272) [user] mfix_vars1(";;                   (rule $pq $qr))))", _508298)
^  Unify: (272) [user] mfix_vars1(";;                   (rule $pq $qr))))", _508298)
   Call: (273) [system] ";;                   (rule $pq $qr))))"==true
^  Redo: (272) [user] mfix_vars1(";;                   (rule $pq $qr))))", _508298)
^  Unify: (272) [user] mfix_vars1(";;                   (rule $pq $qr))))", _508298)
   Call: (273) [system] ";;                   (rule $pq $qr))))"==false
^  Redo: (272) [user] mfix_vars1(";;                   (rule $pq $qr))))", _508298)
^  Unify: (272) [user] mfix_vars1(";;                   (rule $pq $qr))))", _508298)
   Call: (273) [system] ";;                   (rule $pq $qr))))"==[_522224, _522230]
^  Redo: (272) [user] mfix_vars1(";;                   (rule $pq $qr))))", _508298)
^  Unify: (272) [user] mfix_vars1(";;                   (rule $pq $qr))))", _6030)
   Call: (273) [system] is_list(";;                   (rule $pq $qr))))")
^  Redo: (272) [user] mfix_vars1(";;                   (rule $pq $qr))))", _6030)
^  Unify: (272) [user] mfix_vars1(";;                   (rule $pq $qr))))", _6030)
   Call: (273) [system] string(";;                   (rule $pq $qr))))")
   Exit: (273) [system] string(";;                   (rule $pq $qr))))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;                   (rule $pq $qr))))", _6030)
^  Unify: (272) [user] mfix_vars1(";;                   (rule $pq $qr))))", _6030)
   Call: (273) [system] compound(";;                   (rule $pq $qr))))")
^  Redo: (272) [user] mfix_vars1(";;                   (rule $pq $qr))))", _6030)
^  Unify: (272) [user] mfix_vars1(";;                   (rule $pq $qr))))", _6030)
^  Call: (273) [user] symbol(";;                   (rule $pq $qr))))")
^  Unify: (273) [user] symbol(";;                   (rule $pq $qr))))")
   Call: (274) [system] atom(";;                   (rule $pq $qr))))")
   Fail: (274) [system] atom(";;                   (rule $pq $qr))))")
^  Fail: (273) [user] symbol(";;                   (rule $pq $qr))))")
^  Redo: (272) [user] mfix_vars1(";;                   (rule $pq $qr))))", _6030)
   Call: (273) [system] ";;                   (rule $pq $qr))))"=_6030
   Exit: (273) [system] ";;                   (rule $pq $qr))))"=";;                   (rule $pq $qr))))"
^  Exit: (272) [user] mfix_vars1(";;                   (rule $pq $qr))))", ";;                   (rule $pq $qr))))")
   Call: (272) [apply] apply:maplist_([1335, 0], _6032, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1335, 0], [_28198|_28200], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1335, _28198)
^  Unify: (273) [user] mfix_vars1(1335, _28198)
   Call: (274) [system] var(1335)
^  Redo: (273) [user] mfix_vars1(1335, _28198)
^  Unify: (273) [user] mfix_vars1(1335, '$VAR'(_32844))
   Call: (274) [system] atom(1335)
^  Redo: (273) [user] mfix_vars1(1335, _28198)
^  Unify: (273) [user] mfix_vars1(1335, _28198)
   Call: (274) [system] 1335==true
^  Redo: (273) [user] mfix_vars1(1335, _28198)
^  Unify: (273) [user] mfix_vars1(1335, _28198)
   Call: (274) [system] 1335==false
^  Redo: (273) [user] mfix_vars1(1335, _28198)
^  Unify: (273) [user] mfix_vars1(1335, _28198)
   Call: (274) [system] 1335==[_42124, _42130]
^  Redo: (273) [user] mfix_vars1(1335, _28198)
^  Unify: (273) [user] mfix_vars1(1335, _28198)
   Call: (274) [system] is_list(1335)
^  Redo: (273) [user] mfix_vars1(1335, _28198)
^  Unify: (273) [user] mfix_vars1(1335, _28198)
   Call: (274) [system] string(1335)
^  Redo: (273) [user] mfix_vars1(1335, _28198)
^  Unify: (273) [user] mfix_vars1(1335, _28198)
   Call: (274) [system] compound(1335)
^  Redo: (273) [user] mfix_vars1(1335, _28198)
^  Unify: (273) [user] mfix_vars1(1335, _28198)
^  Call: (274) [user] symbol(1335)
^  Unify: (274) [user] symbol(1335)
   Call: (275) [system] atom(1335)
   Fail: (275) [system] atom(1335)
^  Fail: (274) [user] symbol(1335)
^  Redo: (273) [user] mfix_vars1(1335, _28198)
   Call: (274) [system] 1335=_28198
   Exit: (274) [system] 1335=1335
^  Exit: (273) [user] mfix_vars1(1335, 1335)
   Call: (273) [apply] apply:maplist_([0], _28200, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_62524|_62526], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _62524)
^  Unify: (274) [user] mfix_vars1(0, _62524)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _62524)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_67170))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _62524)
^  Unify: (274) [user] mfix_vars1(0, _62524)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _62524)
^  Unify: (274) [user] mfix_vars1(0, _62524)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _62524)
^  Unify: (274) [user] mfix_vars1(0, _62524)
   Call: (275) [system] 0==[_76450, _76456]
^  Redo: (274) [user] mfix_vars1(0, _62524)
^  Unify: (274) [user] mfix_vars1(0, _62524)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _62524)
^  Unify: (274) [user] mfix_vars1(0, _62524)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _62524)
^  Unify: (274) [user] mfix_vars1(0, _62524)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _62524)
^  Unify: (274) [user] mfix_vars1(0, _62524)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _62524)
   Call: (275) [system] 0=_62524
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _62526, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1335, 0], [1335, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;                   (rule $pq $qr))))", 1335, 0], [";;                   (rule $pq $qr))))", 1335, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;                   (rule $pq $qr))))", 1335, 0], [";;                   (rule $pq $qr))))", 1335, 0])
   Call: (270) [system] compound_name_arguments(_5984, '$COMMENT', [";;                   (rule $pq $qr))))", 1335, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT', [";;                   (rule $pq $qr))))", 1335, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0)))
   Call: (267) [system] '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0)\=@='$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _5970)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _112698))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _112698))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _112698))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _112698))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _112698)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _112698)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _118284))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _118284))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _118284)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _118284)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _118284)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0)))
   Call: (267) [system] '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0)\=@='$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _112698)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _140604))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _140604))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _140604)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _140604)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _140604)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0)))
   Call: (267) [system] '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0)\=@='$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0)))
   Call: (261) [system] '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0)\=@='$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _169382, [], _169384)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _169382, [], _169384)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _169382, [], _169384)
   Call: (258) [system] atom('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _169382, [], _169384)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _169382, [], _169384)
   Call: (258) [system] compound('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
   Exit: (258) [system] compound('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), _178698, _178700)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT', [";;                   (rule $pq $qr))))", 1335, 0])
^  Call: (258) [user] subst_vars([";;                   (rule $pq $qr))))", 1335, 0], _180584, [], _169384)
^  Unify: (258) [user] subst_vars([";;                   (rule $pq $qr))))", 1335, 0], [";;                   (rule $pq $qr))))", 1335, 0], [], [])
   Call: (259) [system] var([";;                   (rule $pq $qr))))", 1335, 0])
^  Redo: (258) [user] subst_vars([";;                   (rule $pq $qr))))", 1335, 0], _180584, [], _169384)
^  Unify: (258) [user] subst_vars([";;                   (rule $pq $qr))))", 1335, 0], [_184320|_184322], [], _169384)
^  Call: (259) [user] subst_vars(";;                   (rule $pq $qr))))", _184320, [], _185260)
^  Unify: (259) [user] subst_vars(";;                   (rule $pq $qr))))", ";;                   (rule $pq $qr))))", [], [])
   Call: (260) [system] var(";;                   (rule $pq $qr))))")
^  Redo: (259) [user] subst_vars(";;                   (rule $pq $qr))))", _184320, [], _185260)
^  Unify: (259) [user] subst_vars(";;                   (rule $pq $qr))))", _184320, [], _185260)
   Call: (260) [system] atom(";;                   (rule $pq $qr))))")
^  Redo: (259) [user] subst_vars(";;                   (rule $pq $qr))))", _184320, [], _185260)
^  Unify: (259) [user] subst_vars(";;                   (rule $pq $qr))))", _184320, [], _185260)
   Call: (260) [system] compound(";;                   (rule $pq $qr))))")
^  Redo: (259) [user] subst_vars(";;                   (rule $pq $qr))))", _184320, [], _185260)
^  Unify: (259) [user] subst_vars(";;                   (rule $pq $qr))))", ";;                   (rule $pq $qr))))", [], [])
^  Exit: (259) [user] subst_vars(";;                   (rule $pq $qr))))", ";;                   (rule $pq $qr))))", [], [])
^  Call: (259) [user] subst_vars([1335, 0], _184322, [], _169384)
^  Unify: (259) [user] subst_vars([1335, 0], [1335, 0], [], [])
   Call: (260) [system] var([1335, 0])
^  Redo: (259) [user] subst_vars([1335, 0], _184322, [], _169384)
^  Unify: (259) [user] subst_vars([1335, 0], [_200192|_200194], [], _169384)
^  Call: (260) [user] subst_vars(1335, _200192, [], _201132)
^  Unify: (260) [user] subst_vars(1335, 1335, [], [])
   Call: (261) [system] var(1335)
^  Redo: (260) [user] subst_vars(1335, _200192, [], _201132)
^  Unify: (260) [user] subst_vars(1335, _200192, [], _201132)
   Call: (261) [system] atom(1335)
^  Redo: (260) [user] subst_vars(1335, _200192, [], _201132)
^  Unify: (260) [user] subst_vars(1335, _200192, [], _201132)
   Call: (261) [system] compound(1335)
^  Redo: (260) [user] subst_vars(1335, _200192, [], _201132)
^  Unify: (260) [user] subst_vars(1335, 1335, [], [])
^  Exit: (260) [user] subst_vars(1335, 1335, [], [])
^  Call: (260) [user] subst_vars([0], _200194, [], _169384)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _200194, [], _169384)
^  Unify: (260) [user] subst_vars([0], [_216064|_216066], [], _169384)
^  Call: (261) [user] subst_vars(0, _216064, [], _217004)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _216064, [], _217004)
^  Unify: (261) [user] subst_vars(0, _216064, [], _217004)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _216064, [], _217004)
^  Unify: (261) [user] subst_vars(0, _216064, [], _217004)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _216064, [], _217004)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _216066, [], _169384)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _216066, [], _169384)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1335, 0], [1335, 0], [], [])
^  Exit: (258) [user] subst_vars([";;                   (rule $pq $qr))))", 1335, 0], [";;                   (rule $pq $qr))))", 1335, 0], [], [])
   Call: (258) [system] compound_name_arguments(_169382, '$COMMENT', [";;                   (rule $pq $qr))))", 1335, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT', [";;                   (rule $pq $qr))))", 1335, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), [], [])
   Call: (257) [system] _239422=metta_file_buffer(+, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                   (rule $pq $qr))))", 1335, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1336, 0, 48003, '$COMMENT'(";;", 1336, 0), '$stream_position'(48003, 1336, 0, 48017)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1336, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1336, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1336, 0), _292138))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1336, 0), _292138))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1336, 0), _292138)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1336, 0), _292138)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1336, 0), _292138)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1336, 0), _292138)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1336, 0), _297750))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1336, 0), _297750))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1336, 0), _297750))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1336, 0), _297750))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1336, 0), _297750)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1336, 0), _297750)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1336, 0), _303336))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1336, 0), _303336))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1336, 0), _303336)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1336, 0), _303336)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1336, 0), _303336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1336, 0), _303336)
   Call: (270) [system] var('$COMMENT'(";;", 1336, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1336, 0), _303336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1336, 0), '$VAR'(_310796))
   Call: (270) [system] atom('$COMMENT'(";;", 1336, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1336, 0), _303336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1336, 0), _303336)
   Call: (270) [system] '$COMMENT'(";;", 1336, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1336, 0), _303336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1336, 0), _303336)
   Call: (270) [system] '$COMMENT'(";;", 1336, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1336, 0), _303336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1336, 0), _303336)
   Call: (270) [system] '$COMMENT'(";;", 1336, 0)==[_320076, _320082]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1336, 0), _303336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1336, 0), _303336)
   Call: (270) [system] is_list('$COMMENT'(";;", 1336, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1336, 0), _303336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1336, 0), _303336)
   Call: (270) [system] string('$COMMENT'(";;", 1336, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1336, 0), _303336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1336, 0), _303336)
   Call: (270) [system] compound('$COMMENT'(";;", 1336, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1336, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1336, 0), _330278, _330280)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1336, 0), '$COMMENT', [";;", 1336, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1336, 0], _334020)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1336, 0], _334020)
   Call: (271) [apply] apply:maplist_([";;", 1336, 0], _334020, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1336, 0], [_336838|_336840], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _336838)
^  Unify: (272) [user] mfix_vars1(";;", _336838)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _336838)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_341484))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _336838)
^  Unify: (272) [user] mfix_vars1(";;", _336838)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _336838)
^  Unify: (272) [user] mfix_vars1(";;", _336838)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _336838)
^  Unify: (272) [user] mfix_vars1(";;", _336838)
   Call: (273) [system] ";;"==[_350764, _350770]
^  Redo: (272) [user] mfix_vars1(";;", _336838)
^  Unify: (272) [user] mfix_vars1(";;", _336838)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _336838)
^  Unify: (272) [user] mfix_vars1(";;", _336838)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _336838)
^  Unify: (272) [user] mfix_vars1(";;", _336838)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _336838)
^  Unify: (272) [user] mfix_vars1(";;", _336838)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _336838)
   Call: (273) [system] ";;"=_336838
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1336, 0], _336840, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1336, 0], [_374836|_374838], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1336, _374836)
^  Unify: (273) [user] mfix_vars1(1336, _374836)
   Call: (274) [system] var(1336)
^  Redo: (273) [user] mfix_vars1(1336, _374836)
^  Unify: (273) [user] mfix_vars1(1336, '$VAR'(_379482))
   Call: (274) [system] atom(1336)
^  Redo: (273) [user] mfix_vars1(1336, _374836)
^  Unify: (273) [user] mfix_vars1(1336, _374836)
   Call: (274) [system] 1336==true
^  Redo: (273) [user] mfix_vars1(1336, _374836)
^  Unify: (273) [user] mfix_vars1(1336, _374836)
   Call: (274) [system] 1336==false
^  Redo: (273) [user] mfix_vars1(1336, _374836)
^  Unify: (273) [user] mfix_vars1(1336, _374836)
   Call: (274) [system] 1336==[_388762, _388768]
^  Redo: (273) [user] mfix_vars1(1336, _374836)
^  Unify: (273) [user] mfix_vars1(1336, _374836)
   Call: (274) [system] is_list(1336)
^  Redo: (273) [user] mfix_vars1(1336, _374836)
^  Unify: (273) [user] mfix_vars1(1336, _374836)
   Call: (274) [system] string(1336)
^  Redo: (273) [user] mfix_vars1(1336, _374836)
^  Unify: (273) [user] mfix_vars1(1336, _374836)
   Call: (274) [system] compound(1336)
^  Redo: (273) [user] mfix_vars1(1336, _374836)
^  Unify: (273) [user] mfix_vars1(1336, _374836)
^  Call: (274) [user] symbol(1336)
^  Unify: (274) [user] symbol(1336)
   Call: (275) [system] atom(1336)
   Fail: (275) [system] atom(1336)
^  Fail: (274) [user] symbol(1336)
^  Redo: (273) [user] mfix_vars1(1336, _374836)
   Call: (274) [system] 1336=_374836
   Exit: (274) [system] 1336=1336
^  Exit: (273) [user] mfix_vars1(1336, 1336)
   Call: (273) [apply] apply:maplist_([0], _374838, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_409162|_409164], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _409162)
^  Unify: (274) [user] mfix_vars1(0, _409162)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _409162)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_413808))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _409162)
^  Unify: (274) [user] mfix_vars1(0, _409162)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _409162)
^  Unify: (274) [user] mfix_vars1(0, _409162)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _409162)
^  Unify: (274) [user] mfix_vars1(0, _409162)
   Call: (275) [system] 0==[_423088, _423094]
^  Redo: (274) [user] mfix_vars1(0, _409162)
^  Unify: (274) [user] mfix_vars1(0, _409162)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _409162)
^  Unify: (274) [user] mfix_vars1(0, _409162)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _409162)
^  Unify: (274) [user] mfix_vars1(0, _409162)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _409162)
^  Unify: (274) [user] mfix_vars1(0, _409162)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _409162)
   Call: (275) [system] 0=_409162
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _409164, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1336, 0], [1336, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1336, 0], [";;", 1336, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1336, 0], [";;", 1336, 0])
   Call: (270) [system] compound_name_arguments(_303336, '$COMMENT', [";;", 1336, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1336, 0), '$COMMENT', [";;", 1336, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1336, 0)\=@='$COMMENT'(";;", 1336, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1336, 0), _297750)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1336, 0), _459336))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1336, 0), _459336))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1336, 0), _459336))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1336, 0), _459336))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1336, 0), _459336)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1336, 0), _459336)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1336, 0), _464922))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1336, 0), _464922))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1336, 0), _464922)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1336, 0), _464922)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1336, 0), _464922)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1336, 0)\=@='$COMMENT'(";;", 1336, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1336, 0), _459336)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1336, 0), _292138))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1336, 0), _292138))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1336, 0), _292138))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1336, 0), _292138))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1336, 0), _292138)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1336, 0), _292138)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1336, 0), _487242))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1336, 0), _487242))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1336, 0), _487242)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1336, 0), _487242)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1336, 0), _487242)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1336, 0)\=@='$COMMENT'(";;", 1336, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1336, 0), _292138)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1336, 0)\=@='$COMMENT'(";;", 1336, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1336, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1336, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1336, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1336, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1336, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1336, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1336, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1336, 0), _516020, [], _516022)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1336, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1336, 0), _516020, [], _516022)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1336, 0), _516020, [], _516022)
   Call: (258) [system] atom('$COMMENT'(";;", 1336, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1336, 0), _516020, [], _516022)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1336, 0), _516020, [], _516022)
   Call: (258) [system] compound('$COMMENT'(";;", 1336, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1336, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1336, 0), _7388, _7390)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1336, 0), '$COMMENT', [";;", 1336, 0])
^  Call: (258) [user] subst_vars([";;", 1336, 0], _9274, [], _5938)
^  Unify: (258) [user] subst_vars([";;", 1336, 0], [";;", 1336, 0], [], [])
   Call: (259) [system] var([";;", 1336, 0])
^  Redo: (258) [user] subst_vars([";;", 1336, 0], _9274, [], _5938)
^  Unify: (258) [user] subst_vars([";;", 1336, 0], [_13010|_13012], [], _5938)
^  Call: (259) [user] subst_vars(";;", _13010, [], _13950)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _13010, [], _13950)
^  Unify: (259) [user] subst_vars(";;", _13010, [], _13950)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _13010, [], _13950)
^  Unify: (259) [user] subst_vars(";;", _13010, [], _13950)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _13010, [], _13950)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1336, 0], _13012, [], _5938)
^  Unify: (259) [user] subst_vars([1336, 0], [1336, 0], [], [])
   Call: (260) [system] var([1336, 0])
^  Redo: (259) [user] subst_vars([1336, 0], _13012, [], _5938)
^  Unify: (259) [user] subst_vars([1336, 0], [_28882|_28884], [], _5938)
^  Call: (260) [user] subst_vars(1336, _28882, [], _29822)
^  Unify: (260) [user] subst_vars(1336, 1336, [], [])
   Call: (261) [system] var(1336)
^  Redo: (260) [user] subst_vars(1336, _28882, [], _29822)
^  Unify: (260) [user] subst_vars(1336, _28882, [], _29822)
   Call: (261) [system] atom(1336)
^  Redo: (260) [user] subst_vars(1336, _28882, [], _29822)
^  Unify: (260) [user] subst_vars(1336, _28882, [], _29822)
   Call: (261) [system] compound(1336)
^  Redo: (260) [user] subst_vars(1336, _28882, [], _29822)
^  Unify: (260) [user] subst_vars(1336, 1336, [], [])
^  Exit: (260) [user] subst_vars(1336, 1336, [], [])
^  Call: (260) [user] subst_vars([0], _28884, [], _5938)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _28884, [], _5938)
^  Unify: (260) [user] subst_vars([0], [_44754|_44756], [], _5938)
^  Call: (261) [user] subst_vars(0, _44754, [], _45694)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _44754, [], _45694)
^  Unify: (261) [user] subst_vars(0, _44754, [], _45694)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _44754, [], _45694)
^  Unify: (261) [user] subst_vars(0, _44754, [], _45694)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _44754, [], _45694)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _44756, [], _5938)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _44756, [], _5938)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1336, 0], [1336, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1336, 0], [";;", 1336, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5936, '$COMMENT', [";;", 1336, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1336, 0), '$COMMENT', [";;", 1336, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1336, 0), '$COMMENT'(";;", 1336, 0), [], [])
   Call: (257) [system] _68112=metta_file_buffer(+, '$COMMENT'(";;", 1336, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1336, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1336, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1336, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1336, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1336, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1336, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1336, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1336, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1337, 0, 48006, '$COMMENT'(";;            ;; Call", 1337, 0), '$stream_position'(48006, 1337, 0, 48020)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; Call", 1337, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; Call", 1337, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            ;; Call", 1337, 0), _120832))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            ;; Call", 1337, 0), _120832))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            ;; Call", 1337, 0), _120832)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            ;; Call", 1337, 0), _120832)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            ;; Call", 1337, 0), _120832)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            ;; Call", 1337, 0), _120832)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            ;; Call", 1337, 0), _126444))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            ;; Call", 1337, 0), _126444))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            ;; Call", 1337, 0), _126444))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            ;; Call", 1337, 0), _126444))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; Call", 1337, 0), _126444)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; Call", 1337, 0), _126444)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            ;; Call", 1337, 0), _132030))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            ;; Call", 1337, 0), _132030))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            ;; Call", 1337, 0), _132030)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            ;; Call", 1337, 0), _132030)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Call", 1337, 0), _132030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Call", 1337, 0), _132030)
   Call: (270) [system] var('$COMMENT'(";;            ;; Call", 1337, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Call", 1337, 0), _132030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Call", 1337, 0), '$VAR'(_139490))
   Call: (270) [system] atom('$COMMENT'(";;            ;; Call", 1337, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Call", 1337, 0), _132030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Call", 1337, 0), _132030)
   Call: (270) [system] '$COMMENT'(";;            ;; Call", 1337, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Call", 1337, 0), _132030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Call", 1337, 0), _132030)
   Call: (270) [system] '$COMMENT'(";;            ;; Call", 1337, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Call", 1337, 0), _132030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Call", 1337, 0), _132030)
   Call: (270) [system] '$COMMENT'(";;            ;; Call", 1337, 0)==[_148770, _148776]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Call", 1337, 0), _132030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Call", 1337, 0), _132030)
   Call: (270) [system] is_list('$COMMENT'(";;            ;; Call", 1337, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Call", 1337, 0), _132030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Call", 1337, 0), _132030)
   Call: (270) [system] string('$COMMENT'(";;            ;; Call", 1337, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Call", 1337, 0), _132030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Call", 1337, 0), _132030)
   Call: (270) [system] compound('$COMMENT'(";;            ;; Call", 1337, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            ;; Call", 1337, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            ;; Call", 1337, 0), _158972, _158974)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT', [";;            ;; Call", 1337, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            ;; Call", 1337, 0], _162714)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            ;; Call", 1337, 0], _162714)
   Call: (271) [apply] apply:maplist_([";;            ;; Call", 1337, 0], _162714, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            ;; Call", 1337, 0], [_165532|_165534], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            ;; Call", _165532)
^  Unify: (272) [user] mfix_vars1(";;            ;; Call", _165532)
   Call: (273) [system] var(";;            ;; Call")
^  Redo: (272) [user] mfix_vars1(";;            ;; Call", _165532)
^  Unify: (272) [user] mfix_vars1(";;            ;; Call", '$VAR'(_170178))
   Call: (273) [system] atom(";;            ;; Call")
^  Redo: (272) [user] mfix_vars1(";;            ;; Call", _165532)
^  Unify: (272) [user] mfix_vars1(";;            ;; Call", _165532)
   Call: (273) [system] ";;            ;; Call"==true
^  Redo: (272) [user] mfix_vars1(";;            ;; Call", _165532)
^  Unify: (272) [user] mfix_vars1(";;            ;; Call", _165532)
   Call: (273) [system] ";;            ;; Call"==false
^  Redo: (272) [user] mfix_vars1(";;            ;; Call", _165532)
^  Unify: (272) [user] mfix_vars1(";;            ;; Call", _165532)
   Call: (273) [system] ";;            ;; Call"==[_179458, _179464]
^  Redo: (272) [user] mfix_vars1(";;            ;; Call", _165532)
^  Unify: (272) [user] mfix_vars1(";;            ;; Call", _165532)
   Call: (273) [system] is_list(";;            ;; Call")
^  Redo: (272) [user] mfix_vars1(";;            ;; Call", _165532)
^  Unify: (272) [user] mfix_vars1(";;            ;; Call", _165532)
   Call: (273) [system] string(";;            ;; Call")
   Exit: (273) [system] string(";;            ;; Call")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            ;; Call", _165532)
^  Unify: (272) [user] mfix_vars1(";;            ;; Call", _165532)
   Call: (273) [system] compound(";;            ;; Call")
^  Redo: (272) [user] mfix_vars1(";;            ;; Call", _165532)
^  Unify: (272) [user] mfix_vars1(";;            ;; Call", _165532)
^  Call: (273) [user] symbol(";;            ;; Call")
^  Unify: (273) [user] symbol(";;            ;; Call")
   Call: (274) [system] atom(";;            ;; Call")
   Fail: (274) [system] atom(";;            ;; Call")
^  Fail: (273) [user] symbol(";;            ;; Call")
^  Redo: (272) [user] mfix_vars1(";;            ;; Call", _165532)
   Call: (273) [system] ";;            ;; Call"=_165532
   Exit: (273) [system] ";;            ;; Call"=";;            ;; Call"
^  Exit: (272) [user] mfix_vars1(";;            ;; Call", ";;            ;; Call")
   Call: (272) [apply] apply:maplist_([1337, 0], _165534, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1337, 0], [_203530|_203532], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1337, _203530)
^  Unify: (273) [user] mfix_vars1(1337, _203530)
   Call: (274) [system] var(1337)
^  Redo: (273) [user] mfix_vars1(1337, _203530)
^  Unify: (273) [user] mfix_vars1(1337, '$VAR'(_208176))
   Call: (274) [system] atom(1337)
^  Redo: (273) [user] mfix_vars1(1337, _203530)
^  Unify: (273) [user] mfix_vars1(1337, _203530)
   Call: (274) [system] 1337==true
^  Redo: (273) [user] mfix_vars1(1337, _203530)
^  Unify: (273) [user] mfix_vars1(1337, _203530)
   Call: (274) [system] 1337==false
^  Redo: (273) [user] mfix_vars1(1337, _203530)
^  Unify: (273) [user] mfix_vars1(1337, _203530)
   Call: (274) [system] 1337==[_217456, _217462]
^  Redo: (273) [user] mfix_vars1(1337, _203530)
^  Unify: (273) [user] mfix_vars1(1337, _203530)
   Call: (274) [system] is_list(1337)
^  Redo: (273) [user] mfix_vars1(1337, _203530)
^  Unify: (273) [user] mfix_vars1(1337, _203530)
   Call: (274) [system] string(1337)
^  Redo: (273) [user] mfix_vars1(1337, _203530)
^  Unify: (273) [user] mfix_vars1(1337, _203530)
   Call: (274) [system] compound(1337)
^  Redo: (273) [user] mfix_vars1(1337, _203530)
^  Unify: (273) [user] mfix_vars1(1337, _203530)
^  Call: (274) [user] symbol(1337)
^  Unify: (274) [user] symbol(1337)
   Call: (275) [system] atom(1337)
   Fail: (275) [system] atom(1337)
^  Fail: (274) [user] symbol(1337)
^  Redo: (273) [user] mfix_vars1(1337, _203530)
   Call: (274) [system] 1337=_203530
   Exit: (274) [system] 1337=1337
^  Exit: (273) [user] mfix_vars1(1337, 1337)
   Call: (273) [apply] apply:maplist_([0], _203532, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_237856|_237858], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _237856)
^  Unify: (274) [user] mfix_vars1(0, _237856)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _237856)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_242502))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _237856)
^  Unify: (274) [user] mfix_vars1(0, _237856)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _237856)
^  Unify: (274) [user] mfix_vars1(0, _237856)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _237856)
^  Unify: (274) [user] mfix_vars1(0, _237856)
   Call: (275) [system] 0==[_251782, _251788]
^  Redo: (274) [user] mfix_vars1(0, _237856)
^  Unify: (274) [user] mfix_vars1(0, _237856)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _237856)
^  Unify: (274) [user] mfix_vars1(0, _237856)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _237856)
^  Unify: (274) [user] mfix_vars1(0, _237856)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _237856)
^  Unify: (274) [user] mfix_vars1(0, _237856)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _237856)
   Call: (275) [system] 0=_237856
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _237858, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1337, 0], [1337, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            ;; Call", 1337, 0], [";;            ;; Call", 1337, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            ;; Call", 1337, 0], [";;            ;; Call", 1337, 0])
   Call: (270) [system] compound_name_arguments(_132030, '$COMMENT', [";;            ;; Call", 1337, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT', [";;            ;; Call", 1337, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0)))
   Call: (267) [system] '$COMMENT'(";;            ;; Call", 1337, 0)\=@='$COMMENT'(";;            ;; Call", 1337, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; Call", 1337, 0), _126444)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            ;; Call", 1337, 0), _288030))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            ;; Call", 1337, 0), _288030))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            ;; Call", 1337, 0), _288030))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            ;; Call", 1337, 0), _288030))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; Call", 1337, 0), _288030)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; Call", 1337, 0), _288030)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            ;; Call", 1337, 0), _293616))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            ;; Call", 1337, 0), _293616))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            ;; Call", 1337, 0), _293616)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            ;; Call", 1337, 0), _293616)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            ;; Call", 1337, 0), _293616)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0)))
   Call: (267) [system] '$COMMENT'(";;            ;; Call", 1337, 0)\=@='$COMMENT'(";;            ;; Call", 1337, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; Call", 1337, 0), _288030)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            ;; Call", 1337, 0), _120832))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            ;; Call", 1337, 0), _120832))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            ;; Call", 1337, 0), _120832))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            ;; Call", 1337, 0), _120832))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; Call", 1337, 0), _120832)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; Call", 1337, 0), _120832)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            ;; Call", 1337, 0), _315936))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            ;; Call", 1337, 0), _315936))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            ;; Call", 1337, 0), _315936)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            ;; Call", 1337, 0), _315936)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            ;; Call", 1337, 0), _315936)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0)))
   Call: (267) [system] '$COMMENT'(";;            ;; Call", 1337, 0)\=@='$COMMENT'(";;            ;; Call", 1337, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; Call", 1337, 0), _120832)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0)))
   Call: (261) [system] '$COMMENT'(";;            ;; Call", 1337, 0)\=@='$COMMENT'(";;            ;; Call", 1337, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; Call", 1337, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ;; Call", 1337, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ;; Call", 1337, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ;; Call", 1337, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ;; Call", 1337, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            ;; Call", 1337, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            ;; Call", 1337, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            ;; Call", 1337, 0), _344714, [], _344716)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            ;; Call", 1337, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            ;; Call", 1337, 0), _344714, [], _344716)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            ;; Call", 1337, 0), _344714, [], _344716)
   Call: (258) [system] atom('$COMMENT'(";;            ;; Call", 1337, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            ;; Call", 1337, 0), _344714, [], _344716)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            ;; Call", 1337, 0), _344714, [], _344716)
   Call: (258) [system] compound('$COMMENT'(";;            ;; Call", 1337, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            ;; Call", 1337, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            ;; Call", 1337, 0), _354030, _354032)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT', [";;            ;; Call", 1337, 0])
^  Call: (258) [user] subst_vars([";;            ;; Call", 1337, 0], _355916, [], _344716)
^  Unify: (258) [user] subst_vars([";;            ;; Call", 1337, 0], [";;            ;; Call", 1337, 0], [], [])
   Call: (259) [system] var([";;            ;; Call", 1337, 0])
^  Redo: (258) [user] subst_vars([";;            ;; Call", 1337, 0], _355916, [], _344716)
^  Unify: (258) [user] subst_vars([";;            ;; Call", 1337, 0], [_359652|_359654], [], _344716)
^  Call: (259) [user] subst_vars(";;            ;; Call", _359652, [], _360592)
^  Unify: (259) [user] subst_vars(";;            ;; Call", ";;            ;; Call", [], [])
   Call: (260) [system] var(";;            ;; Call")
^  Redo: (259) [user] subst_vars(";;            ;; Call", _359652, [], _360592)
^  Unify: (259) [user] subst_vars(";;            ;; Call", _359652, [], _360592)
   Call: (260) [system] atom(";;            ;; Call")
^  Redo: (259) [user] subst_vars(";;            ;; Call", _359652, [], _360592)
^  Unify: (259) [user] subst_vars(";;            ;; Call", _359652, [], _360592)
   Call: (260) [system] compound(";;            ;; Call")
^  Redo: (259) [user] subst_vars(";;            ;; Call", _359652, [], _360592)
^  Unify: (259) [user] subst_vars(";;            ;; Call", ";;            ;; Call", [], [])
^  Exit: (259) [user] subst_vars(";;            ;; Call", ";;            ;; Call", [], [])
^  Call: (259) [user] subst_vars([1337, 0], _359654, [], _344716)
^  Unify: (259) [user] subst_vars([1337, 0], [1337, 0], [], [])
   Call: (260) [system] var([1337, 0])
^  Redo: (259) [user] subst_vars([1337, 0], _359654, [], _344716)
^  Unify: (259) [user] subst_vars([1337, 0], [_375524|_375526], [], _344716)
^  Call: (260) [user] subst_vars(1337, _375524, [], _376464)
^  Unify: (260) [user] subst_vars(1337, 1337, [], [])
   Call: (261) [system] var(1337)
^  Redo: (260) [user] subst_vars(1337, _375524, [], _376464)
^  Unify: (260) [user] subst_vars(1337, _375524, [], _376464)
   Call: (261) [system] atom(1337)
^  Redo: (260) [user] subst_vars(1337, _375524, [], _376464)
^  Unify: (260) [user] subst_vars(1337, _375524, [], _376464)
   Call: (261) [system] compound(1337)
^  Redo: (260) [user] subst_vars(1337, _375524, [], _376464)
^  Unify: (260) [user] subst_vars(1337, 1337, [], [])
^  Exit: (260) [user] subst_vars(1337, 1337, [], [])
^  Call: (260) [user] subst_vars([0], _375526, [], _344716)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _375526, [], _344716)
^  Unify: (260) [user] subst_vars([0], [_391396|_391398], [], _344716)
^  Call: (261) [user] subst_vars(0, _391396, [], _392336)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _391396, [], _392336)
^  Unify: (261) [user] subst_vars(0, _391396, [], _392336)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _391396, [], _392336)
^  Unify: (261) [user] subst_vars(0, _391396, [], _392336)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _391396, [], _392336)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _391398, [], _344716)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _391398, [], _344716)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1337, 0], [1337, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            ;; Call", 1337, 0], [";;            ;; Call", 1337, 0], [], [])
   Call: (258) [system] compound_name_arguments(_344714, '$COMMENT', [";;            ;; Call", 1337, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT', [";;            ;; Call", 1337, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            ;; Call", 1337, 0), '$COMMENT'(";;            ;; Call", 1337, 0), [], [])
   Call: (257) [system] _414754=metta_file_buffer(+, '$COMMENT'(";;            ;; Call", 1337, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            ;; Call", 1337, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            ;; Call", 1337, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            ;; Call", 1337, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            ;; Call", 1337, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ;; Call", 1337, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ;; Call", 1337, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ;; Call", 1337, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ;; Call", 1337, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1338, 0, 48028, '$COMMENT'(";;            !(query &self)", 1338, 0), '$stream_position'(48028, 1338, 0, 48042)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(query &self)", 1338, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(query &self)", 1338, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            !(query &self)", 1338, 0), _467476))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            !(query &self)", 1338, 0), _467476))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            !(query &self)", 1338, 0), _467476)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            !(query &self)", 1338, 0), _467476)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            !(query &self)", 1338, 0), _467476)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            !(query &self)", 1338, 0), _467476)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            !(query &self)", 1338, 0), _473088))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            !(query &self)", 1338, 0), _473088))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(query &self)", 1338, 0), _473088))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(query &self)", 1338, 0), _473088))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(query &self)", 1338, 0), _473088)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(query &self)", 1338, 0), _473088)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            !(query &self)", 1338, 0), _478674))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            !(query &self)", 1338, 0), _478674))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            !(query &self)", 1338, 0), _478674)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            !(query &self)", 1338, 0), _478674)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            !(query &self)", 1338, 0), _478674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(query &self)", 1338, 0), _478674)
   Call: (270) [system] var('$COMMENT'(";;            !(query &self)", 1338, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(query &self)", 1338, 0), _478674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(query &self)", 1338, 0), '$VAR'(_486134))
   Call: (270) [system] atom('$COMMENT'(";;            !(query &self)", 1338, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(query &self)", 1338, 0), _478674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(query &self)", 1338, 0), _478674)
   Call: (270) [system] '$COMMENT'(";;            !(query &self)", 1338, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(query &self)", 1338, 0), _478674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(query &self)", 1338, 0), _478674)
   Call: (270) [system] '$COMMENT'(";;            !(query &self)", 1338, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(query &self)", 1338, 0), _478674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(query &self)", 1338, 0), _478674)
   Call: (270) [system] '$COMMENT'(";;            !(query &self)", 1338, 0)==[_495414, _495420]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(query &self)", 1338, 0), _478674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(query &self)", 1338, 0), _478674)
   Call: (270) [system] is_list('$COMMENT'(";;            !(query &self)", 1338, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(query &self)", 1338, 0), _478674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(query &self)", 1338, 0), _478674)
   Call: (270) [system] string('$COMMENT'(";;            !(query &self)", 1338, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(query &self)", 1338, 0), _478674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(query &self)", 1338, 0), _478674)
   Call: (270) [system] compound('$COMMENT'(";;            !(query &self)", 1338, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            !(query &self)", 1338, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            !(query &self)", 1338, 0), _505616, _505618)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT', [";;            !(query &self)", 1338, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            !(query &self)", 1338, 0], _509358)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            !(query &self)", 1338, 0], _509358)
   Call: (271) [apply] apply:maplist_([";;            !(query &self)", 1338, 0], _509358, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            !(query &self)", 1338, 0], [_512176|_512178], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            !(query &self)", _512176)
^  Unify: (272) [user] mfix_vars1(";;            !(query &self)", _512176)
   Call: (273) [system] var(";;            !(query &self)")
^  Redo: (272) [user] mfix_vars1(";;            !(query &self)", _512176)
^  Unify: (272) [user] mfix_vars1(";;            !(query &self)", '$VAR'(_516822))
   Call: (273) [system] atom(";;            !(query &self)")
^  Redo: (272) [user] mfix_vars1(";;            !(query &self)", _512176)
^  Unify: (272) [user] mfix_vars1(";;            !(query &self)", _512176)
   Call: (273) [system] ";;            !(query &self)"==true
^  Redo: (272) [user] mfix_vars1(";;            !(query &self)", _512176)
^  Unify: (272) [user] mfix_vars1(";;            !(query &self)", _512176)
   Call: (273) [system] ";;            !(query &self)"==false
^  Redo: (272) [user] mfix_vars1(";;            !(query &self)", _6028)
^  Unify: (272) [user] mfix_vars1(";;            !(query &self)", _6028)
   Call: (273) [system] ";;            !(query &self)"==[_8242, _8248]
^  Redo: (272) [user] mfix_vars1(";;            !(query &self)", _6028)
^  Unify: (272) [user] mfix_vars1(";;            !(query &self)", _6028)
   Call: (273) [system] is_list(";;            !(query &self)")
^  Redo: (272) [user] mfix_vars1(";;            !(query &self)", _6028)
^  Unify: (272) [user] mfix_vars1(";;            !(query &self)", _6028)
   Call: (273) [system] string(";;            !(query &self)")
   Exit: (273) [system] string(";;            !(query &self)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            !(query &self)", _6028)
^  Unify: (272) [user] mfix_vars1(";;            !(query &self)", _6028)
   Call: (273) [system] compound(";;            !(query &self)")
^  Redo: (272) [user] mfix_vars1(";;            !(query &self)", _6028)
^  Unify: (272) [user] mfix_vars1(";;            !(query &self)", _6028)
^  Call: (273) [user] symbol(";;            !(query &self)")
^  Unify: (273) [user] symbol(";;            !(query &self)")
   Call: (274) [system] atom(";;            !(query &self)")
   Fail: (274) [system] atom(";;            !(query &self)")
^  Fail: (273) [user] symbol(";;            !(query &self)")
^  Redo: (272) [user] mfix_vars1(";;            !(query &self)", _6028)
   Call: (273) [system] ";;            !(query &self)"=_6028
   Exit: (273) [system] ";;            !(query &self)"=";;            !(query &self)"
^  Exit: (272) [user] mfix_vars1(";;            !(query &self)", ";;            !(query &self)")
   Call: (272) [apply] apply:maplist_([1338, 0], _6030, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1338, 0], [_32314|_32316], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1338, _32314)
^  Unify: (273) [user] mfix_vars1(1338, _32314)
   Call: (274) [system] var(1338)
^  Redo: (273) [user] mfix_vars1(1338, _32314)
^  Unify: (273) [user] mfix_vars1(1338, '$VAR'(_36960))
   Call: (274) [system] atom(1338)
^  Redo: (273) [user] mfix_vars1(1338, _32314)
^  Unify: (273) [user] mfix_vars1(1338, _32314)
   Call: (274) [system] 1338==true
^  Redo: (273) [user] mfix_vars1(1338, _32314)
^  Unify: (273) [user] mfix_vars1(1338, _32314)
   Call: (274) [system] 1338==false
^  Redo: (273) [user] mfix_vars1(1338, _32314)
^  Unify: (273) [user] mfix_vars1(1338, _32314)
   Call: (274) [system] 1338==[_46240, _46246]
^  Redo: (273) [user] mfix_vars1(1338, _32314)
^  Unify: (273) [user] mfix_vars1(1338, _32314)
   Call: (274) [system] is_list(1338)
^  Redo: (273) [user] mfix_vars1(1338, _32314)
^  Unify: (273) [user] mfix_vars1(1338, _32314)
   Call: (274) [system] string(1338)
^  Redo: (273) [user] mfix_vars1(1338, _32314)
^  Unify: (273) [user] mfix_vars1(1338, _32314)
   Call: (274) [system] compound(1338)
^  Redo: (273) [user] mfix_vars1(1338, _32314)
^  Unify: (273) [user] mfix_vars1(1338, _32314)
^  Call: (274) [user] symbol(1338)
^  Unify: (274) [user] symbol(1338)
   Call: (275) [system] atom(1338)
   Fail: (275) [system] atom(1338)
^  Fail: (274) [user] symbol(1338)
^  Redo: (273) [user] mfix_vars1(1338, _32314)
   Call: (274) [system] 1338=_32314
   Exit: (274) [system] 1338=1338
^  Exit: (273) [user] mfix_vars1(1338, 1338)
   Call: (273) [apply] apply:maplist_([0], _32316, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_66640|_66642], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _66640)
^  Unify: (274) [user] mfix_vars1(0, _66640)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _66640)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_71286))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _66640)
^  Unify: (274) [user] mfix_vars1(0, _66640)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _66640)
^  Unify: (274) [user] mfix_vars1(0, _66640)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _66640)
^  Unify: (274) [user] mfix_vars1(0, _66640)
   Call: (275) [system] 0==[_80566, _80572]
^  Redo: (274) [user] mfix_vars1(0, _66640)
^  Unify: (274) [user] mfix_vars1(0, _66640)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _66640)
^  Unify: (274) [user] mfix_vars1(0, _66640)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _66640)
^  Unify: (274) [user] mfix_vars1(0, _66640)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _66640)
^  Unify: (274) [user] mfix_vars1(0, _66640)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _66640)
   Call: (275) [system] 0=_66640
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _66642, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1338, 0], [1338, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            !(query &self)", 1338, 0], [";;            !(query &self)", 1338, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            !(query &self)", 1338, 0], [";;            !(query &self)", 1338, 0])
   Call: (270) [system] compound_name_arguments(_5982, '$COMMENT', [";;            !(query &self)", 1338, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT', [";;            !(query &self)", 1338, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(query &self)", 1338, 0)\=@='$COMMENT'(";;            !(query &self)", 1338, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(query &self)", 1338, 0), _5968)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            !(query &self)", 1338, 0), _116814))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            !(query &self)", 1338, 0), _116814))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            !(query &self)", 1338, 0), _116814))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            !(query &self)", 1338, 0), _116814))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(query &self)", 1338, 0), _116814)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(query &self)", 1338, 0), _116814)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            !(query &self)", 1338, 0), _122400))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            !(query &self)", 1338, 0), _122400))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            !(query &self)", 1338, 0), _122400)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            !(query &self)", 1338, 0), _122400)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            !(query &self)", 1338, 0), _122400)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(query &self)", 1338, 0)\=@='$COMMENT'(";;            !(query &self)", 1338, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(query &self)", 1338, 0), _116814)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            !(query &self)", 1338, 0), _5948))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            !(query &self)", 1338, 0), _5948))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            !(query &self)", 1338, 0), _5948))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            !(query &self)", 1338, 0), _5948))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(query &self)", 1338, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(query &self)", 1338, 0), _5948)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            !(query &self)", 1338, 0), _144720))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            !(query &self)", 1338, 0), _144720))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            !(query &self)", 1338, 0), _144720)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            !(query &self)", 1338, 0), _144720)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            !(query &self)", 1338, 0), _144720)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(query &self)", 1338, 0)\=@='$COMMENT'(";;            !(query &self)", 1338, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(query &self)", 1338, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0)))
   Call: (261) [system] '$COMMENT'(";;            !(query &self)", 1338, 0)\=@='$COMMENT'(";;            !(query &self)", 1338, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(query &self)", 1338, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(query &self)", 1338, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(query &self)", 1338, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(query &self)", 1338, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(query &self)", 1338, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            !(query &self)", 1338, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            !(query &self)", 1338, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            !(query &self)", 1338, 0), _173498, [], _173500)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            !(query &self)", 1338, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            !(query &self)", 1338, 0), _173498, [], _173500)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(query &self)", 1338, 0), _173498, [], _173500)
   Call: (258) [system] atom('$COMMENT'(";;            !(query &self)", 1338, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            !(query &self)", 1338, 0), _173498, [], _173500)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(query &self)", 1338, 0), _173498, [], _173500)
   Call: (258) [system] compound('$COMMENT'(";;            !(query &self)", 1338, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            !(query &self)", 1338, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            !(query &self)", 1338, 0), _182814, _182816)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT', [";;            !(query &self)", 1338, 0])
^  Call: (258) [user] subst_vars([";;            !(query &self)", 1338, 0], _184700, [], _173500)
^  Unify: (258) [user] subst_vars([";;            !(query &self)", 1338, 0], [";;            !(query &self)", 1338, 0], [], [])
   Call: (259) [system] var([";;            !(query &self)", 1338, 0])
^  Redo: (258) [user] subst_vars([";;            !(query &self)", 1338, 0], _184700, [], _173500)
^  Unify: (258) [user] subst_vars([";;            !(query &self)", 1338, 0], [_188436|_188438], [], _173500)
^  Call: (259) [user] subst_vars(";;            !(query &self)", _188436, [], _189376)
^  Unify: (259) [user] subst_vars(";;            !(query &self)", ";;            !(query &self)", [], [])
   Call: (260) [system] var(";;            !(query &self)")
^  Redo: (259) [user] subst_vars(";;            !(query &self)", _188436, [], _189376)
^  Unify: (259) [user] subst_vars(";;            !(query &self)", _188436, [], _189376)
   Call: (260) [system] atom(";;            !(query &self)")
^  Redo: (259) [user] subst_vars(";;            !(query &self)", _188436, [], _189376)
^  Unify: (259) [user] subst_vars(";;            !(query &self)", _188436, [], _189376)
   Call: (260) [system] compound(";;            !(query &self)")
^  Redo: (259) [user] subst_vars(";;            !(query &self)", _188436, [], _189376)
^  Unify: (259) [user] subst_vars(";;            !(query &self)", ";;            !(query &self)", [], [])
^  Exit: (259) [user] subst_vars(";;            !(query &self)", ";;            !(query &self)", [], [])
^  Call: (259) [user] subst_vars([1338, 0], _188438, [], _173500)
^  Unify: (259) [user] subst_vars([1338, 0], [1338, 0], [], [])
   Call: (260) [system] var([1338, 0])
^  Redo: (259) [user] subst_vars([1338, 0], _188438, [], _173500)
^  Unify: (259) [user] subst_vars([1338, 0], [_204308|_204310], [], _173500)
^  Call: (260) [user] subst_vars(1338, _204308, [], _205248)
^  Unify: (260) [user] subst_vars(1338, 1338, [], [])
   Call: (261) [system] var(1338)
^  Redo: (260) [user] subst_vars(1338, _204308, [], _205248)
^  Unify: (260) [user] subst_vars(1338, _204308, [], _205248)
   Call: (261) [system] atom(1338)
^  Redo: (260) [user] subst_vars(1338, _204308, [], _205248)
^  Unify: (260) [user] subst_vars(1338, _204308, [], _205248)
   Call: (261) [system] compound(1338)
^  Redo: (260) [user] subst_vars(1338, _204308, [], _205248)
^  Unify: (260) [user] subst_vars(1338, 1338, [], [])
^  Exit: (260) [user] subst_vars(1338, 1338, [], [])
^  Call: (260) [user] subst_vars([0], _204310, [], _173500)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _204310, [], _173500)
^  Unify: (260) [user] subst_vars([0], [_220180|_220182], [], _173500)
^  Call: (261) [user] subst_vars(0, _220180, [], _221120)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _220180, [], _221120)
^  Unify: (261) [user] subst_vars(0, _220180, [], _221120)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _220180, [], _221120)
^  Unify: (261) [user] subst_vars(0, _220180, [], _221120)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _220180, [], _221120)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _220182, [], _173500)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _220182, [], _173500)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1338, 0], [1338, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            !(query &self)", 1338, 0], [";;            !(query &self)", 1338, 0], [], [])
   Call: (258) [system] compound_name_arguments(_173498, '$COMMENT', [";;            !(query &self)", 1338, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT', [";;            !(query &self)", 1338, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            !(query &self)", 1338, 0), '$COMMENT'(";;            !(query &self)", 1338, 0), [], [])
   Call: (257) [system] _243538=metta_file_buffer(+, '$COMMENT'(";;            !(query &self)", 1338, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            !(query &self)", 1338, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            !(query &self)", 1338, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            !(query &self)", 1338, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            !(query &self)", 1338, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(query &self)", 1338, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(query &self)", 1338, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(query &self)", 1338, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(query &self)", 1338, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1339, 0, 48057, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$stream_position'(48057, 1339, 0, 48071)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _296280))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _296280))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _296280)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _296280)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _296280)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _296280)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _301892))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _301892))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _301892))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _301892))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _301892)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _301892)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _307478))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _307478))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _307478)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _307478)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _307478)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _307478)
   Call: (270) [system] var('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _307478)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$VAR'(_314938))
   Call: (270) [system] atom('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _307478)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _307478)
   Call: (270) [system] '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _307478)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _307478)
   Call: (270) [system] '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _307478)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _307478)
   Call: (270) [system] '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0)==[_324218, _324224]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _307478)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _307478)
   Call: (270) [system] is_list('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _307478)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _307478)
   Call: (270) [system] string('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _307478)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _307478)
   Call: (270) [system] compound('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _334420, _334422)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT', [";;            ;; [(→ P R)]", 1339, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            ;; [(→ P R)]", 1339, 0], _338162)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            ;; [(→ P R)]", 1339, 0], _338162)
   Call: (271) [apply] apply:maplist_([";;            ;; [(→ P R)]", 1339, 0], _338162, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            ;; [(→ P R)]", 1339, 0], [_340980|_340982], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            ;; [(→ P R)]", _340980)
^  Unify: (272) [user] mfix_vars1(";;            ;; [(→ P R)]", _340980)
   Call: (273) [system] var(";;            ;; [(→ P R)]")
^  Redo: (272) [user] mfix_vars1(";;            ;; [(→ P R)]", _340980)
^  Unify: (272) [user] mfix_vars1(";;            ;; [(→ P R)]", '$VAR'(_345626))
   Call: (273) [system] atom(";;            ;; [(→ P R)]")
^  Redo: (272) [user] mfix_vars1(";;            ;; [(→ P R)]", _340980)
^  Unify: (272) [user] mfix_vars1(";;            ;; [(→ P R)]", _340980)
   Call: (273) [system] ";;            ;; [(→ P R)]"==true
^  Redo: (272) [user] mfix_vars1(";;            ;; [(→ P R)]", _340980)
^  Unify: (272) [user] mfix_vars1(";;            ;; [(→ P R)]", _340980)
   Call: (273) [system] ";;            ;; [(→ P R)]"==false
^  Redo: (272) [user] mfix_vars1(";;            ;; [(→ P R)]", _340980)
^  Unify: (272) [user] mfix_vars1(";;            ;; [(→ P R)]", _340980)
   Call: (273) [system] ";;            ;; [(→ P R)]"==[_354906, _354912]
^  Redo: (272) [user] mfix_vars1(";;            ;; [(→ P R)]", _340980)
^  Unify: (272) [user] mfix_vars1(";;            ;; [(→ P R)]", _340980)
   Call: (273) [system] is_list(";;            ;; [(→ P R)]")
^  Redo: (272) [user] mfix_vars1(";;            ;; [(→ P R)]", _340980)
^  Unify: (272) [user] mfix_vars1(";;            ;; [(→ P R)]", _340980)
   Call: (273) [system] string(";;            ;; [(→ P R)]")
   Exit: (273) [system] string(";;            ;; [(→ P R)]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            ;; [(→ P R)]", _340980)
^  Unify: (272) [user] mfix_vars1(";;            ;; [(→ P R)]", _340980)
   Call: (273) [system] compound(";;            ;; [(→ P R)]")
^  Redo: (272) [user] mfix_vars1(";;            ;; [(→ P R)]", _340980)
^  Unify: (272) [user] mfix_vars1(";;            ;; [(→ P R)]", _340980)
^  Call: (273) [user] symbol(";;            ;; [(→ P R)]")
^  Unify: (273) [user] symbol(";;            ;; [(→ P R)]")
   Call: (274) [system] atom(";;            ;; [(→ P R)]")
   Fail: (274) [system] atom(";;            ;; [(→ P R)]")
^  Fail: (273) [user] symbol(";;            ;; [(→ P R)]")
^  Redo: (272) [user] mfix_vars1(";;            ;; [(→ P R)]", _340980)
   Call: (273) [system] ";;            ;; [(→ P R)]"=_340980
   Exit: (273) [system] ";;            ;; [(→ P R)]"=";;            ;; [(→ P R)]"
^  Exit: (272) [user] mfix_vars1(";;            ;; [(→ P R)]", ";;            ;; [(→ P R)]")
   Call: (272) [apply] apply:maplist_([1339, 0], _340982, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1339, 0], [_378978|_378980], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1339, _378978)
^  Unify: (273) [user] mfix_vars1(1339, _378978)
   Call: (274) [system] var(1339)
^  Redo: (273) [user] mfix_vars1(1339, _378978)
^  Unify: (273) [user] mfix_vars1(1339, '$VAR'(_383624))
   Call: (274) [system] atom(1339)
^  Redo: (273) [user] mfix_vars1(1339, _378978)
^  Unify: (273) [user] mfix_vars1(1339, _378978)
   Call: (274) [system] 1339==true
^  Redo: (273) [user] mfix_vars1(1339, _378978)
^  Unify: (273) [user] mfix_vars1(1339, _378978)
   Call: (274) [system] 1339==false
^  Redo: (273) [user] mfix_vars1(1339, _378978)
^  Unify: (273) [user] mfix_vars1(1339, _378978)
   Call: (274) [system] 1339==[_392904, _392910]
^  Redo: (273) [user] mfix_vars1(1339, _378978)
^  Unify: (273) [user] mfix_vars1(1339, _378978)
   Call: (274) [system] is_list(1339)
^  Redo: (273) [user] mfix_vars1(1339, _378978)
^  Unify: (273) [user] mfix_vars1(1339, _378978)
   Call: (274) [system] string(1339)
^  Redo: (273) [user] mfix_vars1(1339, _378978)
^  Unify: (273) [user] mfix_vars1(1339, _378978)
   Call: (274) [system] compound(1339)
^  Redo: (273) [user] mfix_vars1(1339, _378978)
^  Unify: (273) [user] mfix_vars1(1339, _378978)
^  Call: (274) [user] symbol(1339)
^  Unify: (274) [user] symbol(1339)
   Call: (275) [system] atom(1339)
   Fail: (275) [system] atom(1339)
^  Fail: (274) [user] symbol(1339)
^  Redo: (273) [user] mfix_vars1(1339, _378978)
   Call: (274) [system] 1339=_378978
   Exit: (274) [system] 1339=1339
^  Exit: (273) [user] mfix_vars1(1339, 1339)
   Call: (273) [apply] apply:maplist_([0], _378980, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_413304|_413306], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _413304)
^  Unify: (274) [user] mfix_vars1(0, _413304)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _413304)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_417950))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _413304)
^  Unify: (274) [user] mfix_vars1(0, _413304)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _413304)
^  Unify: (274) [user] mfix_vars1(0, _413304)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _413304)
^  Unify: (274) [user] mfix_vars1(0, _413304)
   Call: (275) [system] 0==[_427230, _427236]
^  Redo: (274) [user] mfix_vars1(0, _413304)
^  Unify: (274) [user] mfix_vars1(0, _413304)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _413304)
^  Unify: (274) [user] mfix_vars1(0, _413304)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _413304)
^  Unify: (274) [user] mfix_vars1(0, _413304)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _413304)
^  Unify: (274) [user] mfix_vars1(0, _413304)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _413304)
   Call: (275) [system] 0=_413304
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _413306, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1339, 0], [1339, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            ;; [(→ P R)]", 1339, 0], [";;            ;; [(→ P R)]", 1339, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            ;; [(→ P R)]", 1339, 0], [";;            ;; [(→ P R)]", 1339, 0])
   Call: (270) [system] compound_name_arguments(_307478, '$COMMENT', [";;            ;; [(→ P R)]", 1339, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT', [";;            ;; [(→ P R)]", 1339, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0)))
   Call: (267) [system] '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0)\=@='$COMMENT'(";;            ;; [(→ P R)]", 1339, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _301892)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _463478))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _463478))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _463478))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _463478))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _463478)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _463478)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _469064))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _469064))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _469064)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _469064)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _469064)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0)))
   Call: (267) [system] '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0)\=@='$COMMENT'(";;            ;; [(→ P R)]", 1339, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _463478)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _296280))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _296280))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _296280))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _296280))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _296280)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _296280)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _491384))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _491384))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _491384)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _491384)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _491384)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0)))
   Call: (267) [system] '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0)\=@='$COMMENT'(";;            ;; [(→ P R)]", 1339, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _296280)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0)))
   Call: (261) [system] '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0)\=@='$COMMENT'(";;            ;; [(→ P R)]", 1339, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _520162, [], _520164)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _520162, [], _520164)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _5962, [], _5964)
   Call: (258) [system] atom('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _5962, [], _5964)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _5962, [], _5964)
   Call: (258) [system] compound('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), _11474, _11476)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT', [";;            ;; [(→ P R)]", 1339, 0])
^  Call: (258) [user] subst_vars([";;            ;; [(→ P R)]", 1339, 0], _13360, [], _5964)
^  Unify: (258) [user] subst_vars([";;            ;; [(→ P R)]", 1339, 0], [";;            ;; [(→ P R)]", 1339, 0], [], [])
   Call: (259) [system] var([";;            ;; [(→ P R)]", 1339, 0])
^  Redo: (258) [user] subst_vars([";;            ;; [(→ P R)]", 1339, 0], _13360, [], _5964)
^  Unify: (258) [user] subst_vars([";;            ;; [(→ P R)]", 1339, 0], [_17096|_17098], [], _5964)
^  Call: (259) [user] subst_vars(";;            ;; [(→ P R)]", _17096, [], _18036)
^  Unify: (259) [user] subst_vars(";;            ;; [(→ P R)]", ";;            ;; [(→ P R)]", [], [])
   Call: (260) [system] var(";;            ;; [(→ P R)]")
^  Redo: (259) [user] subst_vars(";;            ;; [(→ P R)]", _17096, [], _18036)
^  Unify: (259) [user] subst_vars(";;            ;; [(→ P R)]", _17096, [], _18036)
   Call: (260) [system] atom(";;            ;; [(→ P R)]")
^  Redo: (259) [user] subst_vars(";;            ;; [(→ P R)]", _17096, [], _18036)
^  Unify: (259) [user] subst_vars(";;            ;; [(→ P R)]", _17096, [], _18036)
   Call: (260) [system] compound(";;            ;; [(→ P R)]")
^  Redo: (259) [user] subst_vars(";;            ;; [(→ P R)]", _17096, [], _18036)
^  Unify: (259) [user] subst_vars(";;            ;; [(→ P R)]", ";;            ;; [(→ P R)]", [], [])
^  Exit: (259) [user] subst_vars(";;            ;; [(→ P R)]", ";;            ;; [(→ P R)]", [], [])
^  Call: (259) [user] subst_vars([1339, 0], _17098, [], _5964)
^  Unify: (259) [user] subst_vars([1339, 0], [1339, 0], [], [])
   Call: (260) [system] var([1339, 0])
^  Redo: (259) [user] subst_vars([1339, 0], _17098, [], _5964)
^  Unify: (259) [user] subst_vars([1339, 0], [_32968|_32970], [], _5964)
^  Call: (260) [user] subst_vars(1339, _32968, [], _33908)
^  Unify: (260) [user] subst_vars(1339, 1339, [], [])
   Call: (261) [system] var(1339)
^  Redo: (260) [user] subst_vars(1339, _32968, [], _33908)
^  Unify: (260) [user] subst_vars(1339, _32968, [], _33908)
   Call: (261) [system] atom(1339)
^  Redo: (260) [user] subst_vars(1339, _32968, [], _33908)
^  Unify: (260) [user] subst_vars(1339, _32968, [], _33908)
   Call: (261) [system] compound(1339)
^  Redo: (260) [user] subst_vars(1339, _32968, [], _33908)
^  Unify: (260) [user] subst_vars(1339, 1339, [], [])
^  Exit: (260) [user] subst_vars(1339, 1339, [], [])
^  Call: (260) [user] subst_vars([0], _32970, [], _5964)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _32970, [], _5964)
^  Unify: (260) [user] subst_vars([0], [_48840|_48842], [], _5964)
^  Call: (261) [user] subst_vars(0, _48840, [], _49780)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _48840, [], _49780)
^  Unify: (261) [user] subst_vars(0, _48840, [], _49780)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _48840, [], _49780)
^  Unify: (261) [user] subst_vars(0, _48840, [], _49780)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _48840, [], _49780)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _48842, [], _5964)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _48842, [], _5964)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1339, 0], [1339, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            ;; [(→ P R)]", 1339, 0], [";;            ;; [(→ P R)]", 1339, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5962, '$COMMENT', [";;            ;; [(→ P R)]", 1339, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT', [";;            ;; [(→ P R)]", 1339, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), [], [])
   Call: (257) [system] _72198=metta_file_buffer(+, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ;; [(→ P R)]", 1339, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1340, 0, 48084, '$COMMENT'(";;        \";", 1340, 0), '$stream_position'(48084, 1340, 0, 48100)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        \";", 1340, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        \";", 1340, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        \";", 1340, 0), _124916))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        \";", 1340, 0), _124916))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        \";", 1340, 0), _124916)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        \";", 1340, 0), _124916)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        \";", 1340, 0), _124916)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        \";", 1340, 0), _124916)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        \";", 1340, 0), _130528))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        \";", 1340, 0), _130528))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        \";", 1340, 0), _130528))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        \";", 1340, 0), _130528))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        \";", 1340, 0), _130528)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        \";", 1340, 0), _130528)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        \";", 1340, 0), _136114))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        \";", 1340, 0), _136114))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        \";", 1340, 0), _136114)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        \";", 1340, 0), _136114)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        \";", 1340, 0), _136114)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \";", 1340, 0), _136114)
   Call: (270) [system] var('$COMMENT'(";;        \";", 1340, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \";", 1340, 0), _136114)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \";", 1340, 0), '$VAR'(_143574))
   Call: (270) [system] atom('$COMMENT'(";;        \";", 1340, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \";", 1340, 0), _136114)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \";", 1340, 0), _136114)
   Call: (270) [system] '$COMMENT'(";;        \";", 1340, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \";", 1340, 0), _136114)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \";", 1340, 0), _136114)
   Call: (270) [system] '$COMMENT'(";;        \";", 1340, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \";", 1340, 0), _136114)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \";", 1340, 0), _136114)
   Call: (270) [system] '$COMMENT'(";;        \";", 1340, 0)==[_152854, _152860]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \";", 1340, 0), _136114)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \";", 1340, 0), _136114)
   Call: (270) [system] is_list('$COMMENT'(";;        \";", 1340, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \";", 1340, 0), _136114)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \";", 1340, 0), _136114)
   Call: (270) [system] string('$COMMENT'(";;        \";", 1340, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \";", 1340, 0), _136114)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \";", 1340, 0), _136114)
   Call: (270) [system] compound('$COMMENT'(";;        \";", 1340, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        \";", 1340, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        \";", 1340, 0), _163056, _163058)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        \";", 1340, 0), '$COMMENT', [";;        \";", 1340, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        \";", 1340, 0], _166798)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        \";", 1340, 0], _166798)
   Call: (271) [apply] apply:maplist_([";;        \";", 1340, 0], _166798, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        \";", 1340, 0], [_169616|_169618], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        \";", _169616)
^  Unify: (272) [user] mfix_vars1(";;        \";", _169616)
   Call: (273) [system] var(";;        \";")
^  Redo: (272) [user] mfix_vars1(";;        \";", _169616)
^  Unify: (272) [user] mfix_vars1(";;        \";", '$VAR'(_174262))
   Call: (273) [system] atom(";;        \";")
^  Redo: (272) [user] mfix_vars1(";;        \";", _169616)
^  Unify: (272) [user] mfix_vars1(";;        \";", _169616)
   Call: (273) [system] ";;        \";"==true
^  Redo: (272) [user] mfix_vars1(";;        \";", _169616)
^  Unify: (272) [user] mfix_vars1(";;        \";", _169616)
   Call: (273) [system] ";;        \";"==false
^  Redo: (272) [user] mfix_vars1(";;        \";", _169616)
^  Unify: (272) [user] mfix_vars1(";;        \";", _169616)
   Call: (273) [system] ";;        \";"==[_183542, _183548]
^  Redo: (272) [user] mfix_vars1(";;        \";", _169616)
^  Unify: (272) [user] mfix_vars1(";;        \";", _169616)
   Call: (273) [system] is_list(";;        \";")
^  Redo: (272) [user] mfix_vars1(";;        \";", _169616)
^  Unify: (272) [user] mfix_vars1(";;        \";", _169616)
   Call: (273) [system] string(";;        \";")
   Exit: (273) [system] string(";;        \";")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        \";", _169616)
^  Unify: (272) [user] mfix_vars1(";;        \";", _169616)
   Call: (273) [system] compound(";;        \";")
^  Redo: (272) [user] mfix_vars1(";;        \";", _169616)
^  Unify: (272) [user] mfix_vars1(";;        \";", _169616)
^  Call: (273) [user] symbol(";;        \";")
^  Unify: (273) [user] symbol(";;        \";")
   Call: (274) [system] atom(";;        \";")
   Fail: (274) [system] atom(";;        \";")
^  Fail: (273) [user] symbol(";;        \";")
^  Redo: (272) [user] mfix_vars1(";;        \";", _169616)
   Call: (273) [system] ";;        \";"=_169616
   Exit: (273) [system] ";;        \";"=";;        \";"
^  Exit: (272) [user] mfix_vars1(";;        \";", ";;        \";")
   Call: (272) [apply] apply:maplist_([1340, 0], _169618, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1340, 0], [_207614|_207616], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1340, _207614)
^  Unify: (273) [user] mfix_vars1(1340, _207614)
   Call: (274) [system] var(1340)
^  Redo: (273) [user] mfix_vars1(1340, _207614)
^  Unify: (273) [user] mfix_vars1(1340, '$VAR'(_212260))
   Call: (274) [system] atom(1340)
^  Redo: (273) [user] mfix_vars1(1340, _207614)
^  Unify: (273) [user] mfix_vars1(1340, _207614)
   Call: (274) [system] 1340==true
^  Redo: (273) [user] mfix_vars1(1340, _207614)
^  Unify: (273) [user] mfix_vars1(1340, _207614)
   Call: (274) [system] 1340==false
^  Redo: (273) [user] mfix_vars1(1340, _207614)
^  Unify: (273) [user] mfix_vars1(1340, _207614)
   Call: (274) [system] 1340==[_221540, _221546]
^  Redo: (273) [user] mfix_vars1(1340, _207614)
^  Unify: (273) [user] mfix_vars1(1340, _207614)
   Call: (274) [system] is_list(1340)
^  Redo: (273) [user] mfix_vars1(1340, _207614)
^  Unify: (273) [user] mfix_vars1(1340, _207614)
   Call: (274) [system] string(1340)
^  Redo: (273) [user] mfix_vars1(1340, _207614)
^  Unify: (273) [user] mfix_vars1(1340, _207614)
   Call: (274) [system] compound(1340)
^  Redo: (273) [user] mfix_vars1(1340, _207614)
^  Unify: (273) [user] mfix_vars1(1340, _207614)
^  Call: (274) [user] symbol(1340)
^  Unify: (274) [user] symbol(1340)
   Call: (275) [system] atom(1340)
   Fail: (275) [system] atom(1340)
^  Fail: (274) [user] symbol(1340)
^  Redo: (273) [user] mfix_vars1(1340, _207614)
   Call: (274) [system] 1340=_207614
   Exit: (274) [system] 1340=1340
^  Exit: (273) [user] mfix_vars1(1340, 1340)
   Call: (273) [apply] apply:maplist_([0], _207616, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_241940|_241942], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _241940)
^  Unify: (274) [user] mfix_vars1(0, _241940)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _241940)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_246586))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _241940)
^  Unify: (274) [user] mfix_vars1(0, _241940)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _241940)
^  Unify: (274) [user] mfix_vars1(0, _241940)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _241940)
^  Unify: (274) [user] mfix_vars1(0, _241940)
   Call: (275) [system] 0==[_255866, _255872]
^  Redo: (274) [user] mfix_vars1(0, _241940)
^  Unify: (274) [user] mfix_vars1(0, _241940)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _241940)
^  Unify: (274) [user] mfix_vars1(0, _241940)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _241940)
^  Unify: (274) [user] mfix_vars1(0, _241940)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _241940)
^  Unify: (274) [user] mfix_vars1(0, _241940)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _241940)
   Call: (275) [system] 0=_241940
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _241942, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1340, 0], [1340, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        \";", 1340, 0], [";;        \";", 1340, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        \";", 1340, 0], [";;        \";", 1340, 0])
   Call: (270) [system] compound_name_arguments(_136114, '$COMMENT', [";;        \";", 1340, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        \";", 1340, 0), '$COMMENT', [";;        \";", 1340, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0)))
   Call: (267) [system] '$COMMENT'(";;        \";", 1340, 0)\=@='$COMMENT'(";;        \";", 1340, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        \";", 1340, 0), _130528)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        \";", 1340, 0), _292114))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        \";", 1340, 0), _292114))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        \";", 1340, 0), _292114))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        \";", 1340, 0), _292114))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        \";", 1340, 0), _292114)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        \";", 1340, 0), _292114)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        \";", 1340, 0), _297700))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        \";", 1340, 0), _297700))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        \";", 1340, 0), _297700)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        \";", 1340, 0), _297700)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        \";", 1340, 0), _297700)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0)))
   Call: (267) [system] '$COMMENT'(";;        \";", 1340, 0)\=@='$COMMENT'(";;        \";", 1340, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        \";", 1340, 0), _292114)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        \";", 1340, 0), _124916))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        \";", 1340, 0), _124916))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        \";", 1340, 0), _124916))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        \";", 1340, 0), _124916))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        \";", 1340, 0), _124916)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        \";", 1340, 0), _124916)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        \";", 1340, 0), _320020))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        \";", 1340, 0), _320020))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        \";", 1340, 0), _320020)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        \";", 1340, 0), _320020)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        \";", 1340, 0), _320020)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0)))
   Call: (267) [system] '$COMMENT'(";;        \";", 1340, 0)\=@='$COMMENT'(";;        \";", 1340, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        \";", 1340, 0), _124916)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0)))
   Call: (261) [system] '$COMMENT'(";;        \";", 1340, 0)\=@='$COMMENT'(";;        \";", 1340, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        \";", 1340, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        \";", 1340, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        \";", 1340, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        \";", 1340, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        \";", 1340, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        \";", 1340, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        \";", 1340, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        \";", 1340, 0), _348798, [], _348800)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        \";", 1340, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        \";", 1340, 0), _348798, [], _348800)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        \";", 1340, 0), _348798, [], _348800)
   Call: (258) [system] atom('$COMMENT'(";;        \";", 1340, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        \";", 1340, 0), _348798, [], _348800)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        \";", 1340, 0), _348798, [], _348800)
   Call: (258) [system] compound('$COMMENT'(";;        \";", 1340, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        \";", 1340, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        \";", 1340, 0), _358114, _358116)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        \";", 1340, 0), '$COMMENT', [";;        \";", 1340, 0])
^  Call: (258) [user] subst_vars([";;        \";", 1340, 0], _360000, [], _348800)
^  Unify: (258) [user] subst_vars([";;        \";", 1340, 0], [";;        \";", 1340, 0], [], [])
   Call: (259) [system] var([";;        \";", 1340, 0])
^  Redo: (258) [user] subst_vars([";;        \";", 1340, 0], _360000, [], _348800)
^  Unify: (258) [user] subst_vars([";;        \";", 1340, 0], [_363736|_363738], [], _348800)
^  Call: (259) [user] subst_vars(";;        \";", _363736, [], _364676)
^  Unify: (259) [user] subst_vars(";;        \";", ";;        \";", [], [])
   Call: (260) [system] var(";;        \";")
^  Redo: (259) [user] subst_vars(";;        \";", _363736, [], _364676)
^  Unify: (259) [user] subst_vars(";;        \";", _363736, [], _364676)
   Call: (260) [system] atom(";;        \";")
^  Redo: (259) [user] subst_vars(";;        \";", _363736, [], _364676)
^  Unify: (259) [user] subst_vars(";;        \";", _363736, [], _364676)
   Call: (260) [system] compound(";;        \";")
^  Redo: (259) [user] subst_vars(";;        \";", _363736, [], _364676)
^  Unify: (259) [user] subst_vars(";;        \";", ";;        \";", [], [])
^  Exit: (259) [user] subst_vars(";;        \";", ";;        \";", [], [])
^  Call: (259) [user] subst_vars([1340, 0], _363738, [], _348800)
^  Unify: (259) [user] subst_vars([1340, 0], [1340, 0], [], [])
   Call: (260) [system] var([1340, 0])
^  Redo: (259) [user] subst_vars([1340, 0], _363738, [], _348800)
^  Unify: (259) [user] subst_vars([1340, 0], [_379608|_379610], [], _348800)
^  Call: (260) [user] subst_vars(1340, _379608, [], _380548)
^  Unify: (260) [user] subst_vars(1340, 1340, [], [])
   Call: (261) [system] var(1340)
^  Redo: (260) [user] subst_vars(1340, _379608, [], _380548)
^  Unify: (260) [user] subst_vars(1340, _379608, [], _380548)
   Call: (261) [system] atom(1340)
^  Redo: (260) [user] subst_vars(1340, _379608, [], _380548)
^  Unify: (260) [user] subst_vars(1340, _379608, [], _380548)
   Call: (261) [system] compound(1340)
^  Redo: (260) [user] subst_vars(1340, _379608, [], _380548)
^  Unify: (260) [user] subst_vars(1340, 1340, [], [])
^  Exit: (260) [user] subst_vars(1340, 1340, [], [])
^  Call: (260) [user] subst_vars([0], _379610, [], _348800)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _379610, [], _348800)
^  Unify: (260) [user] subst_vars([0], [_395480|_395482], [], _348800)
^  Call: (261) [user] subst_vars(0, _395480, [], _396420)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _395480, [], _396420)
^  Unify: (261) [user] subst_vars(0, _395480, [], _396420)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _395480, [], _396420)
^  Unify: (261) [user] subst_vars(0, _395480, [], _396420)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _395480, [], _396420)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _395482, [], _348800)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _395482, [], _348800)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1340, 0], [1340, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        \";", 1340, 0], [";;        \";", 1340, 0], [], [])
   Call: (258) [system] compound_name_arguments(_348798, '$COMMENT', [";;        \";", 1340, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        \";", 1340, 0), '$COMMENT', [";;        \";", 1340, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        \";", 1340, 0), '$COMMENT'(";;        \";", 1340, 0), [], [])
   Call: (257) [system] _418838=metta_file_buffer(+, '$COMMENT'(";;        \";", 1340, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        \";", 1340, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        \";", 1340, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        \";", 1340, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        \";", 1340, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        \";", 1340, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        \";", 1340, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        \";", 1340, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        \";", 1340, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1341, 0, 48097, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$stream_position'(48097, 1341, 0, 48113)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _471648))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _471648))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _471648)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _471648)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _471648)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _471648)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _477260))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _477260))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _477260))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _477260))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _477260)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _477260)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _482846))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _482846))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _482846)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _482846)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _482846)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _482846)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _482846)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$VAR'(_490306))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _482846)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _482846)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _482846)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _482846)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _482846)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _482846)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0)==[_499586, _499592]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _482846)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _482846)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _482846)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _482846)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _482846)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _482846)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _509788, _509790)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT', [";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0], _513530)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0], _513530)
   Call: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0], _513530, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0], [_516348|_516350], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _516348)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _516348)
   Call: (273) [system] var(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _516348)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", '$VAR'(_520994))
   Call: (273) [system] atom(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _516348)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _6116)
   Call: (273) [system] ";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _6116)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _6116)
   Call: (273) [system] ";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _6116)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _6116)
   Call: (273) [system] ";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));"==[_12438, _12444]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _6116)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _6116)
   Call: (273) [system] is_list(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _6116)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _6116)
   Call: (273) [system] string(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));")
   Exit: (273) [system] string(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _6116)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _6116)
   Call: (273) [system] compound(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _6116)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _6116)
^  Call: (273) [user] symbol(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));")
^  Unify: (273) [user] symbol(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));")
   Call: (274) [system] atom(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));")
   Fail: (274) [system] atom(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));")
^  Fail: (273) [user] symbol(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _6116)
   Call: (273) [system] ";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));"=_6116
   Exit: (273) [system] ";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));"=";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", ";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));")
   Call: (272) [apply] apply:maplist_([1341, 0], _6118, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1341, 0], [_36510|_36512], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1341, _36510)
^  Unify: (273) [user] mfix_vars1(1341, _36510)
   Call: (274) [system] var(1341)
^  Redo: (273) [user] mfix_vars1(1341, _36510)
^  Unify: (273) [user] mfix_vars1(1341, '$VAR'(_41156))
   Call: (274) [system] atom(1341)
^  Redo: (273) [user] mfix_vars1(1341, _36510)
^  Unify: (273) [user] mfix_vars1(1341, _36510)
   Call: (274) [system] 1341==true
^  Redo: (273) [user] mfix_vars1(1341, _36510)
^  Unify: (273) [user] mfix_vars1(1341, _36510)
   Call: (274) [system] 1341==false
^  Redo: (273) [user] mfix_vars1(1341, _36510)
^  Unify: (273) [user] mfix_vars1(1341, _36510)
   Call: (274) [system] 1341==[_50436, _50442]
^  Redo: (273) [user] mfix_vars1(1341, _36510)
^  Unify: (273) [user] mfix_vars1(1341, _36510)
   Call: (274) [system] is_list(1341)
^  Redo: (273) [user] mfix_vars1(1341, _36510)
^  Unify: (273) [user] mfix_vars1(1341, _36510)
   Call: (274) [system] string(1341)
^  Redo: (273) [user] mfix_vars1(1341, _36510)
^  Unify: (273) [user] mfix_vars1(1341, _36510)
   Call: (274) [system] compound(1341)
^  Redo: (273) [user] mfix_vars1(1341, _36510)
^  Unify: (273) [user] mfix_vars1(1341, _36510)
^  Call: (274) [user] symbol(1341)
^  Unify: (274) [user] symbol(1341)
   Call: (275) [system] atom(1341)
   Fail: (275) [system] atom(1341)
^  Fail: (274) [user] symbol(1341)
^  Redo: (273) [user] mfix_vars1(1341, _36510)
   Call: (274) [system] 1341=_36510
   Exit: (274) [system] 1341=1341
^  Exit: (273) [user] mfix_vars1(1341, 1341)
   Call: (273) [apply] apply:maplist_([0], _36512, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_70836|_70838], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _70836)
^  Unify: (274) [user] mfix_vars1(0, _70836)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _70836)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_75482))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _70836)
^  Unify: (274) [user] mfix_vars1(0, _70836)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _70836)
^  Unify: (274) [user] mfix_vars1(0, _70836)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _70836)
^  Unify: (274) [user] mfix_vars1(0, _70836)
   Call: (275) [system] 0==[_84762, _84768]
^  Redo: (274) [user] mfix_vars1(0, _70836)
^  Unify: (274) [user] mfix_vars1(0, _70836)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _70836)
^  Unify: (274) [user] mfix_vars1(0, _70836)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _70836)
^  Unify: (274) [user] mfix_vars1(0, _70836)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _70836)
^  Unify: (274) [user] mfix_vars1(0, _70836)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _70836)
   Call: (275) [system] 0=_70836
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _70838, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1341, 0], [1341, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0], [";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0], [";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0])
   Call: (270) [system] compound_name_arguments(_6070, '$COMMENT', [";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT', [";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _6056)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _121010))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _121010))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _121010))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _121010))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _121010)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _121010)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _126596))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _126596))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _126596)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _126596)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _126596)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _121010)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _6036))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _6036))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _6036))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _6036))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _6036)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _6036)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _148916))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _148916))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _148916)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _148916)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _148916)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _6036)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _177694, [], _177696)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _177694, [], _177696)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _177694, [], _177696)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _177694, [], _177696)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _177694, [], _177696)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), _187010, _187012)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT', [";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0], _188896, [], _177696)
^  Unify: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0], [";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0], [], [])
   Call: (259) [system] var([";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0], _188896, [], _177696)
^  Unify: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0], [_192632|_192634], [], _177696)
^  Call: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _192632, [], _193572)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", ";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", [], [])
   Call: (260) [system] var(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _192632, [], _193572)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _192632, [], _193572)
   Call: (260) [system] atom(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _192632, [], _193572)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _192632, [], _193572)
   Call: (260) [system] compound(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", _192632, [], _193572)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", ";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", ";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", [], [])
^  Call: (259) [user] subst_vars([1341, 0], _192634, [], _177696)
^  Unify: (259) [user] subst_vars([1341, 0], [1341, 0], [], [])
   Call: (260) [system] var([1341, 0])
^  Redo: (259) [user] subst_vars([1341, 0], _192634, [], _177696)
^  Unify: (259) [user] subst_vars([1341, 0], [_208504|_208506], [], _177696)
^  Call: (260) [user] subst_vars(1341, _208504, [], _209444)
^  Unify: (260) [user] subst_vars(1341, 1341, [], [])
   Call: (261) [system] var(1341)
^  Redo: (260) [user] subst_vars(1341, _208504, [], _209444)
^  Unify: (260) [user] subst_vars(1341, _208504, [], _209444)
   Call: (261) [system] atom(1341)
^  Redo: (260) [user] subst_vars(1341, _208504, [], _209444)
^  Unify: (260) [user] subst_vars(1341, _208504, [], _209444)
   Call: (261) [system] compound(1341)
^  Redo: (260) [user] subst_vars(1341, _208504, [], _209444)
^  Unify: (260) [user] subst_vars(1341, 1341, [], [])
^  Exit: (260) [user] subst_vars(1341, 1341, [], [])
^  Call: (260) [user] subst_vars([0], _208506, [], _177696)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _208506, [], _177696)
^  Unify: (260) [user] subst_vars([0], [_224376|_224378], [], _177696)
^  Call: (261) [user] subst_vars(0, _224376, [], _225316)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _224376, [], _225316)
^  Unify: (261) [user] subst_vars(0, _224376, [], _225316)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _224376, [], _225316)
^  Unify: (261) [user] subst_vars(0, _224376, [], _225316)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _224376, [], _225316)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _224378, [], _177696)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _224378, [], _177696)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1341, 0], [1341, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0], [";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0], [], [])
   Call: (258) [system] compound_name_arguments(_177694, '$COMMENT', [";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT', [";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), [], [])
   Call: (257) [system] _247734=metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(run_program(program), Ok(vec![vec![expr!(\"→\" \"P\" \"R\")]]));", 1341, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1342, 0, 48191, '$COMMENT'(";;    }", 1342, 0), '$stream_position'(48191, 1342, 0, 48209)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1342, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1342, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    }", 1342, 0), _300452))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1342, 0), _300452))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    }", 1342, 0), _300452)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1342, 0), _300452)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1342, 0), _300452)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1342, 0), _300452)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    }", 1342, 0), _306064))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1342, 0), _306064))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1342, 0), _306064))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1342, 0), _306064))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1342, 0), _306064)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1342, 0), _306064)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    }", 1342, 0), _311650))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1342, 0), _311650))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    }", 1342, 0), _311650)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1342, 0), _311650)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1342, 0), _311650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1342, 0), _311650)
   Call: (270) [system] var('$COMMENT'(";;    }", 1342, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1342, 0), _311650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1342, 0), '$VAR'(_319110))
   Call: (270) [system] atom('$COMMENT'(";;    }", 1342, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1342, 0), _311650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1342, 0), _311650)
   Call: (270) [system] '$COMMENT'(";;    }", 1342, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1342, 0), _311650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1342, 0), _311650)
   Call: (270) [system] '$COMMENT'(";;    }", 1342, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1342, 0), _311650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1342, 0), _311650)
   Call: (270) [system] '$COMMENT'(";;    }", 1342, 0)==[_328390, _328396]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1342, 0), _311650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1342, 0), _311650)
   Call: (270) [system] is_list('$COMMENT'(";;    }", 1342, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1342, 0), _311650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1342, 0), _311650)
   Call: (270) [system] string('$COMMENT'(";;    }", 1342, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1342, 0), _311650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1342, 0), _311650)
   Call: (270) [system] compound('$COMMENT'(";;    }", 1342, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    }", 1342, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1342, 0), _338592, _338594)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1342, 0), '$COMMENT', [";;    }", 1342, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    }", 1342, 0], _342334)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1342, 0], _342334)
   Call: (271) [apply] apply:maplist_([";;    }", 1342, 0], _342334, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    }", 1342, 0], [_345152|_345154], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    }", _345152)
^  Unify: (272) [user] mfix_vars1(";;    }", _345152)
   Call: (273) [system] var(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _345152)
^  Unify: (272) [user] mfix_vars1(";;    }", '$VAR'(_349798))
   Call: (273) [system] atom(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _345152)
^  Unify: (272) [user] mfix_vars1(";;    }", _345152)
   Call: (273) [system] ";;    }"==true
^  Redo: (272) [user] mfix_vars1(";;    }", _345152)
^  Unify: (272) [user] mfix_vars1(";;    }", _345152)
   Call: (273) [system] ";;    }"==false
^  Redo: (272) [user] mfix_vars1(";;    }", _345152)
^  Unify: (272) [user] mfix_vars1(";;    }", _345152)
   Call: (273) [system] ";;    }"==[_359078, _359084]
^  Redo: (272) [user] mfix_vars1(";;    }", _345152)
^  Unify: (272) [user] mfix_vars1(";;    }", _345152)
   Call: (273) [system] is_list(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _345152)
^  Unify: (272) [user] mfix_vars1(";;    }", _345152)
   Call: (273) [system] string(";;    }")
   Exit: (273) [system] string(";;    }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    }", _345152)
^  Unify: (272) [user] mfix_vars1(";;    }", _345152)
   Call: (273) [system] compound(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _345152)
^  Unify: (272) [user] mfix_vars1(";;    }", _345152)
^  Call: (273) [user] symbol(";;    }")
^  Unify: (273) [user] symbol(";;    }")
   Call: (274) [system] atom(";;    }")
   Fail: (274) [system] atom(";;    }")
^  Fail: (273) [user] symbol(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _345152)
   Call: (273) [system] ";;    }"=_345152
   Exit: (273) [system] ";;    }"=";;    }"
^  Exit: (272) [user] mfix_vars1(";;    }", ";;    }")
   Call: (272) [apply] apply:maplist_([1342, 0], _345154, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1342, 0], [_383150|_383152], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1342, _383150)
^  Unify: (273) [user] mfix_vars1(1342, _383150)
   Call: (274) [system] var(1342)
^  Redo: (273) [user] mfix_vars1(1342, _383150)
^  Unify: (273) [user] mfix_vars1(1342, '$VAR'(_387796))
   Call: (274) [system] atom(1342)
^  Redo: (273) [user] mfix_vars1(1342, _383150)
^  Unify: (273) [user] mfix_vars1(1342, _383150)
   Call: (274) [system] 1342==true
^  Redo: (273) [user] mfix_vars1(1342, _383150)
^  Unify: (273) [user] mfix_vars1(1342, _383150)
   Call: (274) [system] 1342==false
^  Redo: (273) [user] mfix_vars1(1342, _383150)
^  Unify: (273) [user] mfix_vars1(1342, _383150)
   Call: (274) [system] 1342==[_397076, _397082]
^  Redo: (273) [user] mfix_vars1(1342, _383150)
^  Unify: (273) [user] mfix_vars1(1342, _383150)
   Call: (274) [system] is_list(1342)
^  Redo: (273) [user] mfix_vars1(1342, _383150)
^  Unify: (273) [user] mfix_vars1(1342, _383150)
   Call: (274) [system] string(1342)
^  Redo: (273) [user] mfix_vars1(1342, _383150)
^  Unify: (273) [user] mfix_vars1(1342, _383150)
   Call: (274) [system] compound(1342)
^  Redo: (273) [user] mfix_vars1(1342, _383150)
^  Unify: (273) [user] mfix_vars1(1342, _383150)
^  Call: (274) [user] symbol(1342)
^  Unify: (274) [user] symbol(1342)
   Call: (275) [system] atom(1342)
   Fail: (275) [system] atom(1342)
^  Fail: (274) [user] symbol(1342)
^  Redo: (273) [user] mfix_vars1(1342, _383150)
   Call: (274) [system] 1342=_383150
   Exit: (274) [system] 1342=1342
^  Exit: (273) [user] mfix_vars1(1342, 1342)
   Call: (273) [apply] apply:maplist_([0], _383152, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_417476|_417478], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _417476)
^  Unify: (274) [user] mfix_vars1(0, _417476)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _417476)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_422122))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _417476)
^  Unify: (274) [user] mfix_vars1(0, _417476)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _417476)
^  Unify: (274) [user] mfix_vars1(0, _417476)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _417476)
^  Unify: (274) [user] mfix_vars1(0, _417476)
   Call: (275) [system] 0==[_431402, _431408]
^  Redo: (274) [user] mfix_vars1(0, _417476)
^  Unify: (274) [user] mfix_vars1(0, _417476)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _417476)
^  Unify: (274) [user] mfix_vars1(0, _417476)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _417476)
^  Unify: (274) [user] mfix_vars1(0, _417476)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _417476)
^  Unify: (274) [user] mfix_vars1(0, _417476)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _417476)
   Call: (275) [system] 0=_417476
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _417478, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1342, 0], [1342, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    }", 1342, 0], [";;    }", 1342, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1342, 0], [";;    }", 1342, 0])
   Call: (270) [system] compound_name_arguments(_311650, '$COMMENT', [";;    }", 1342, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1342, 0), '$COMMENT', [";;    }", 1342, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1342, 0)\=@='$COMMENT'(";;    }", 1342, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1342, 0), _306064)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    }", 1342, 0), _467650))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1342, 0), _467650))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1342, 0), _467650))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1342, 0), _467650))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1342, 0), _467650)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1342, 0), _467650)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    }", 1342, 0), _473236))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1342, 0), _473236))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    }", 1342, 0), _473236)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1342, 0), _473236)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    }", 1342, 0), _473236)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1342, 0)\=@='$COMMENT'(";;    }", 1342, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1342, 0), _467650)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    }", 1342, 0), _300452))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1342, 0), _300452))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1342, 0), _300452))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1342, 0), _300452))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1342, 0), _300452)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1342, 0), _300452)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    }", 1342, 0), _495556))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1342, 0), _495556))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    }", 1342, 0), _495556)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1342, 0), _495556)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    }", 1342, 0), _495556)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1342, 0)\=@='$COMMENT'(";;    }", 1342, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1342, 0), _300452)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0)))
   Call: (261) [system] '$COMMENT'(";;    }", 1342, 0)\=@='$COMMENT'(";;    }", 1342, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1342, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1342, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1342, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1342, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1342, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    }", 1342, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    }", 1342, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    }", 1342, 0), _6330, [], _6332)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    }", 1342, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1342, 0), _6330, [], _6332)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1342, 0), _6330, [], _6332)
   Call: (258) [system] atom('$COMMENT'(";;    }", 1342, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1342, 0), _6330, [], _6332)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1342, 0), _6330, [], _6332)
   Call: (258) [system] compound('$COMMENT'(";;    }", 1342, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    }", 1342, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1342, 0), _15646, _15648)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1342, 0), '$COMMENT', [";;    }", 1342, 0])
^  Call: (258) [user] subst_vars([";;    }", 1342, 0], _17532, [], _6332)
^  Unify: (258) [user] subst_vars([";;    }", 1342, 0], [";;    }", 1342, 0], [], [])
   Call: (259) [system] var([";;    }", 1342, 0])
^  Redo: (258) [user] subst_vars([";;    }", 1342, 0], _17532, [], _6332)
^  Unify: (258) [user] subst_vars([";;    }", 1342, 0], [_21268|_21270], [], _6332)
^  Call: (259) [user] subst_vars(";;    }", _21268, [], _22208)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
   Call: (260) [system] var(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _21268, [], _22208)
^  Unify: (259) [user] subst_vars(";;    }", _21268, [], _22208)
   Call: (260) [system] atom(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _21268, [], _22208)
^  Unify: (259) [user] subst_vars(";;    }", _21268, [], _22208)
   Call: (260) [system] compound(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _21268, [], _22208)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Exit: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Call: (259) [user] subst_vars([1342, 0], _21270, [], _6332)
^  Unify: (259) [user] subst_vars([1342, 0], [1342, 0], [], [])
   Call: (260) [system] var([1342, 0])
^  Redo: (259) [user] subst_vars([1342, 0], _21270, [], _6332)
^  Unify: (259) [user] subst_vars([1342, 0], [_37140|_37142], [], _6332)
^  Call: (260) [user] subst_vars(1342, _37140, [], _38080)
^  Unify: (260) [user] subst_vars(1342, 1342, [], [])
   Call: (261) [system] var(1342)
^  Redo: (260) [user] subst_vars(1342, _37140, [], _38080)
^  Unify: (260) [user] subst_vars(1342, _37140, [], _38080)
   Call: (261) [system] atom(1342)
^  Redo: (260) [user] subst_vars(1342, _37140, [], _38080)
^  Unify: (260) [user] subst_vars(1342, _37140, [], _38080)
   Call: (261) [system] compound(1342)
^  Redo: (260) [user] subst_vars(1342, _37140, [], _38080)
^  Unify: (260) [user] subst_vars(1342, 1342, [], [])
^  Exit: (260) [user] subst_vars(1342, 1342, [], [])
^  Call: (260) [user] subst_vars([0], _37142, [], _6332)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _37142, [], _6332)
^  Unify: (260) [user] subst_vars([0], [_53012|_53014], [], _6332)
^  Call: (261) [user] subst_vars(0, _53012, [], _53952)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _53012, [], _53952)
^  Unify: (261) [user] subst_vars(0, _53012, [], _53952)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _53012, [], _53952)
^  Unify: (261) [user] subst_vars(0, _53012, [], _53952)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _53012, [], _53952)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _53014, [], _6332)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _53014, [], _6332)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1342, 0], [1342, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    }", 1342, 0], [";;    }", 1342, 0], [], [])
   Call: (258) [system] compound_name_arguments(_6330, '$COMMENT', [";;    }", 1342, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1342, 0), '$COMMENT', [";;    }", 1342, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    }", 1342, 0), '$COMMENT'(";;    }", 1342, 0), [], [])
   Call: (257) [system] _76370=metta_file_buffer(+, '$COMMENT'(";;    }", 1342, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    }", 1342, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    }", 1342, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1342, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1342, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1342, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1342, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1342, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1342, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1343, 0, 48199, '$COMMENT'(";; Converted:", 1343, 0), '$stream_position'(48199, 1343, 0, 48217)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1343, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1343, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1343, 0), _129088))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1343, 0), _129088))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1343, 0), _129088)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1343, 0), _129088)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1343, 0), _129088)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1343, 0), _129088)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1343, 0), _134700))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1343, 0), _134700))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1343, 0), _134700))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1343, 0), _134700))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1343, 0), _134700)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1343, 0), _134700)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1343, 0), _140286))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1343, 0), _140286))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1343, 0), _140286)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1343, 0), _140286)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1343, 0), _140286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1343, 0), _140286)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1343, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1343, 0), _140286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1343, 0), '$VAR'(_147746))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1343, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1343, 0), _140286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1343, 0), _140286)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1343, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1343, 0), _140286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1343, 0), _140286)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1343, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1343, 0), _140286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1343, 0), _140286)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1343, 0)==[_157026, _157032]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1343, 0), _140286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1343, 0), _140286)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1343, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1343, 0), _140286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1343, 0), _140286)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1343, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1343, 0), _140286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1343, 0), _140286)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1343, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1343, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1343, 0), _167228, _167230)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1343, 0), '$COMMENT', [";; Converted:", 1343, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1343, 0], _170970)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1343, 0], _170970)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1343, 0], _170970, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1343, 0], [_173788|_173790], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _173788)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _173788)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _173788)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_178434))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _173788)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _173788)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _173788)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _173788)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _173788)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _173788)
   Call: (273) [system] ";; Converted:"==[_187714, _187720]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _173788)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _173788)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _173788)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _173788)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _173788)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _173788)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _173788)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _173788)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _173788)
   Call: (273) [system] ";; Converted:"=_173788
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1343, 0], _173790, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1343, 0], [_211786|_211788], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1343, _211786)
^  Unify: (273) [user] mfix_vars1(1343, _211786)
   Call: (274) [system] var(1343)
^  Redo: (273) [user] mfix_vars1(1343, _211786)
^  Unify: (273) [user] mfix_vars1(1343, '$VAR'(_216432))
   Call: (274) [system] atom(1343)
^  Redo: (273) [user] mfix_vars1(1343, _211786)
^  Unify: (273) [user] mfix_vars1(1343, _211786)
   Call: (274) [system] 1343==true
^  Redo: (273) [user] mfix_vars1(1343, _211786)
^  Unify: (273) [user] mfix_vars1(1343, _211786)
   Call: (274) [system] 1343==false
^  Redo: (273) [user] mfix_vars1(1343, _211786)
^  Unify: (273) [user] mfix_vars1(1343, _211786)
   Call: (274) [system] 1343==[_225712, _225718]
^  Redo: (273) [user] mfix_vars1(1343, _211786)
^  Unify: (273) [user] mfix_vars1(1343, _211786)
   Call: (274) [system] is_list(1343)
^  Redo: (273) [user] mfix_vars1(1343, _211786)
^  Unify: (273) [user] mfix_vars1(1343, _211786)
   Call: (274) [system] string(1343)
^  Redo: (273) [user] mfix_vars1(1343, _211786)
^  Unify: (273) [user] mfix_vars1(1343, _211786)
   Call: (274) [system] compound(1343)
^  Redo: (273) [user] mfix_vars1(1343, _211786)
^  Unify: (273) [user] mfix_vars1(1343, _211786)
^  Call: (274) [user] symbol(1343)
^  Unify: (274) [user] symbol(1343)
   Call: (275) [system] atom(1343)
   Fail: (275) [system] atom(1343)
^  Fail: (274) [user] symbol(1343)
^  Redo: (273) [user] mfix_vars1(1343, _211786)
   Call: (274) [system] 1343=_211786
   Exit: (274) [system] 1343=1343
^  Exit: (273) [user] mfix_vars1(1343, 1343)
   Call: (273) [apply] apply:maplist_([0], _211788, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_246112|_246114], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _246112)
^  Unify: (274) [user] mfix_vars1(0, _246112)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _246112)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_250758))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _246112)
^  Unify: (274) [user] mfix_vars1(0, _246112)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _246112)
^  Unify: (274) [user] mfix_vars1(0, _246112)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _246112)
^  Unify: (274) [user] mfix_vars1(0, _246112)
   Call: (275) [system] 0==[_260038, _260044]
^  Redo: (274) [user] mfix_vars1(0, _246112)
^  Unify: (274) [user] mfix_vars1(0, _246112)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _246112)
^  Unify: (274) [user] mfix_vars1(0, _246112)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _246112)
^  Unify: (274) [user] mfix_vars1(0, _246112)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _246112)
^  Unify: (274) [user] mfix_vars1(0, _246112)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _246112)
   Call: (275) [system] 0=_246112
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _246114, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1343, 0], [1343, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1343, 0], [";; Converted:", 1343, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1343, 0], [";; Converted:", 1343, 0])
   Call: (270) [system] compound_name_arguments(_140286, '$COMMENT', [";; Converted:", 1343, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1343, 0), '$COMMENT', [";; Converted:", 1343, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1343, 0)\=@='$COMMENT'(";; Converted:", 1343, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1343, 0), _134700)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1343, 0), _296286))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1343, 0), _296286))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1343, 0), _296286))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1343, 0), _296286))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1343, 0), _296286)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1343, 0), _296286)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1343, 0), _301872))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1343, 0), _301872))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1343, 0), _301872)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1343, 0), _301872)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1343, 0), _301872)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1343, 0)\=@='$COMMENT'(";; Converted:", 1343, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1343, 0), _296286)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1343, 0), _129088))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1343, 0), _129088))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1343, 0), _129088))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1343, 0), _129088))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1343, 0), _129088)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1343, 0), _129088)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1343, 0), _324192))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1343, 0), _324192))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1343, 0), _324192)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1343, 0), _324192)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1343, 0), _324192)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1343, 0)\=@='$COMMENT'(";; Converted:", 1343, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1343, 0), _129088)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1343, 0)\=@='$COMMENT'(";; Converted:", 1343, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1343, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1343, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1343, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1343, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1343, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1343, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1343, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1343, 0), _352970, [], _352972)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1343, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1343, 0), _352970, [], _352972)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1343, 0), _352970, [], _352972)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1343, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1343, 0), _352970, [], _352972)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1343, 0), _352970, [], _352972)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1343, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1343, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1343, 0), _362286, _362288)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1343, 0), '$COMMENT', [";; Converted:", 1343, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1343, 0], _364172, [], _352972)
^  Unify: (258) [user] subst_vars([";; Converted:", 1343, 0], [";; Converted:", 1343, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1343, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1343, 0], _364172, [], _352972)
^  Unify: (258) [user] subst_vars([";; Converted:", 1343, 0], [_367908|_367910], [], _352972)
^  Call: (259) [user] subst_vars(";; Converted:", _367908, [], _368848)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _367908, [], _368848)
^  Unify: (259) [user] subst_vars(";; Converted:", _367908, [], _368848)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _367908, [], _368848)
^  Unify: (259) [user] subst_vars(";; Converted:", _367908, [], _368848)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _367908, [], _368848)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1343, 0], _367910, [], _352972)
^  Unify: (259) [user] subst_vars([1343, 0], [1343, 0], [], [])
   Call: (260) [system] var([1343, 0])
^  Redo: (259) [user] subst_vars([1343, 0], _367910, [], _352972)
^  Unify: (259) [user] subst_vars([1343, 0], [_383780|_383782], [], _352972)
^  Call: (260) [user] subst_vars(1343, _383780, [], _384720)
^  Unify: (260) [user] subst_vars(1343, 1343, [], [])
   Call: (261) [system] var(1343)
^  Redo: (260) [user] subst_vars(1343, _383780, [], _384720)
^  Unify: (260) [user] subst_vars(1343, _383780, [], _384720)
   Call: (261) [system] atom(1343)
^  Redo: (260) [user] subst_vars(1343, _383780, [], _384720)
^  Unify: (260) [user] subst_vars(1343, _383780, [], _384720)
   Call: (261) [system] compound(1343)
^  Redo: (260) [user] subst_vars(1343, _383780, [], _384720)
^  Unify: (260) [user] subst_vars(1343, 1343, [], [])
^  Exit: (260) [user] subst_vars(1343, 1343, [], [])
^  Call: (260) [user] subst_vars([0], _383782, [], _352972)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _383782, [], _352972)
^  Unify: (260) [user] subst_vars([0], [_399652|_399654], [], _352972)
^  Call: (261) [user] subst_vars(0, _399652, [], _400592)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _399652, [], _400592)
^  Unify: (261) [user] subst_vars(0, _399652, [], _400592)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _399652, [], _400592)
^  Unify: (261) [user] subst_vars(0, _399652, [], _400592)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _399652, [], _400592)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _399654, [], _352972)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _399654, [], _352972)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1343, 0], [1343, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1343, 0], [";; Converted:", 1343, 0], [], [])
   Call: (258) [system] compound_name_arguments(_352970, '$COMMENT', [";; Converted:", 1343, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1343, 0), '$COMMENT', [";; Converted:", 1343, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1343, 0), '$COMMENT'(";; Converted:", 1343, 0), [], [])
   Call: (257) [system] _423010=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1343, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1343, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1343, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1343, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1343, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1343, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1343, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1343, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1343, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1350, 0, 48391, '$COMMENT'(";; Original:", 1350, 0), '$stream_position'(48391, 1350, 0, 48425)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1350, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1350, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1350, 0), _475728))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1350, 0), _475728))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1350, 0), _475728)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1350, 0), _475728)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1350, 0), _475728)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1350, 0), _475728)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1350, 0), _481340))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1350, 0), _481340))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1350, 0), _481340))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1350, 0), _481340))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1350, 0), _481340)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1350, 0), _481340)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1350, 0), _486926))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1350, 0), _486926))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1350, 0), _486926)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1350, 0), _486926)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1350, 0), _486926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1350, 0), _486926)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1350, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1350, 0), _486926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1350, 0), '$VAR'(_494386))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1350, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1350, 0), _486926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1350, 0), _486926)
   Call: (270) [system] '$COMMENT'(";; Original:", 1350, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1350, 0), _486926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1350, 0), _486926)
   Call: (270) [system] '$COMMENT'(";; Original:", 1350, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1350, 0), _486926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1350, 0), _486926)
   Call: (270) [system] '$COMMENT'(";; Original:", 1350, 0)==[_503666, _503672]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1350, 0), _486926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1350, 0), _486926)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1350, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1350, 0), _486926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1350, 0), _486926)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1350, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1350, 0), _486926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1350, 0), _486926)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1350, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1350, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1350, 0), _513868, _513870)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1350, 0), '$COMMENT', [";; Original:", 1350, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1350, 0], _517610)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1350, 0], _517610)
   Call: (271) [apply] apply:maplist_([";; Original:", 1350, 0], _517610, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1350, 0], [_520428|_520430], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _520428)
^  Unify: (272) [user] mfix_vars1(";; Original:", _520428)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _6024)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_6926))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _6024)
^  Unify: (272) [user] mfix_vars1(";; Original:", _6024)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _6024)
^  Unify: (272) [user] mfix_vars1(";; Original:", _6024)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _6024)
^  Unify: (272) [user] mfix_vars1(";; Original:", _6024)
   Call: (273) [system] ";; Original:"==[_16206, _16212]
^  Redo: (272) [user] mfix_vars1(";; Original:", _6024)
^  Unify: (272) [user] mfix_vars1(";; Original:", _6024)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _6024)
^  Unify: (272) [user] mfix_vars1(";; Original:", _6024)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _6024)
^  Unify: (272) [user] mfix_vars1(";; Original:", _6024)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _6024)
^  Unify: (272) [user] mfix_vars1(";; Original:", _6024)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _6024)
   Call: (273) [system] ";; Original:"=_6024
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1350, 0], _6026, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1350, 0], [_40278|_40280], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1350, _40278)
^  Unify: (273) [user] mfix_vars1(1350, _40278)
   Call: (274) [system] var(1350)
^  Redo: (273) [user] mfix_vars1(1350, _40278)
^  Unify: (273) [user] mfix_vars1(1350, '$VAR'(_44924))
   Call: (274) [system] atom(1350)
^  Redo: (273) [user] mfix_vars1(1350, _40278)
^  Unify: (273) [user] mfix_vars1(1350, _40278)
   Call: (274) [system] 1350==true
^  Redo: (273) [user] mfix_vars1(1350, _40278)
^  Unify: (273) [user] mfix_vars1(1350, _40278)
   Call: (274) [system] 1350==false
^  Redo: (273) [user] mfix_vars1(1350, _40278)
^  Unify: (273) [user] mfix_vars1(1350, _40278)
   Call: (274) [system] 1350==[_54204, _54210]
^  Redo: (273) [user] mfix_vars1(1350, _40278)
^  Unify: (273) [user] mfix_vars1(1350, _40278)
   Call: (274) [system] is_list(1350)
^  Redo: (273) [user] mfix_vars1(1350, _40278)
^  Unify: (273) [user] mfix_vars1(1350, _40278)
   Call: (274) [system] string(1350)
^  Redo: (273) [user] mfix_vars1(1350, _40278)
^  Unify: (273) [user] mfix_vars1(1350, _40278)
   Call: (274) [system] compound(1350)
^  Redo: (273) [user] mfix_vars1(1350, _40278)
^  Unify: (273) [user] mfix_vars1(1350, _40278)
^  Call: (274) [user] symbol(1350)
^  Unify: (274) [user] symbol(1350)
   Call: (275) [system] atom(1350)
   Fail: (275) [system] atom(1350)
^  Fail: (274) [user] symbol(1350)
^  Redo: (273) [user] mfix_vars1(1350, _40278)
   Call: (274) [system] 1350=_40278
   Exit: (274) [system] 1350=1350
^  Exit: (273) [user] mfix_vars1(1350, 1350)
   Call: (273) [apply] apply:maplist_([0], _40280, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_74604|_74606], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _74604)
^  Unify: (274) [user] mfix_vars1(0, _74604)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _74604)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_79250))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _74604)
^  Unify: (274) [user] mfix_vars1(0, _74604)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _74604)
^  Unify: (274) [user] mfix_vars1(0, _74604)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _74604)
^  Unify: (274) [user] mfix_vars1(0, _74604)
   Call: (275) [system] 0==[_88530, _88536]
^  Redo: (274) [user] mfix_vars1(0, _74604)
^  Unify: (274) [user] mfix_vars1(0, _74604)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _74604)
^  Unify: (274) [user] mfix_vars1(0, _74604)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _74604)
^  Unify: (274) [user] mfix_vars1(0, _74604)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _74604)
^  Unify: (274) [user] mfix_vars1(0, _74604)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _74604)
   Call: (275) [system] 0=_74604
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _74606, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1350, 0], [1350, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1350, 0], [";; Original:", 1350, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1350, 0], [";; Original:", 1350, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";; Original:", 1350, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1350, 0), '$COMMENT', [";; Original:", 1350, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1350, 0)\=@='$COMMENT'(";; Original:", 1350, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1350, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1350, 0), _124778))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1350, 0), _124778))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1350, 0), _124778))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1350, 0), _124778))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1350, 0), _124778)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1350, 0), _124778)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1350, 0), _130364))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1350, 0), _130364))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1350, 0), _130364)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1350, 0), _130364)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1350, 0), _130364)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1350, 0)\=@='$COMMENT'(";; Original:", 1350, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1350, 0), _124778)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1350, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1350, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1350, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1350, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1350, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1350, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1350, 0), _152684))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1350, 0), _152684))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1350, 0), _152684)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1350, 0), _152684)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1350, 0), _152684)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1350, 0)\=@='$COMMENT'(";; Original:", 1350, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1350, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1350, 0)\=@='$COMMENT'(";; Original:", 1350, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1350, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1350, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1350, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1350, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1350, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1350, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1350, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1350, 0), _181462, [], _181464)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1350, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1350, 0), _181462, [], _181464)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1350, 0), _181462, [], _181464)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1350, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1350, 0), _181462, [], _181464)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1350, 0), _181462, [], _181464)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1350, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1350, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1350, 0), _190778, _190780)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1350, 0), '$COMMENT', [";; Original:", 1350, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1350, 0], _192664, [], _181464)
^  Unify: (258) [user] subst_vars([";; Original:", 1350, 0], [";; Original:", 1350, 0], [], [])
   Call: (259) [system] var([";; Original:", 1350, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1350, 0], _192664, [], _181464)
^  Unify: (258) [user] subst_vars([";; Original:", 1350, 0], [_196400|_196402], [], _181464)
^  Call: (259) [user] subst_vars(";; Original:", _196400, [], _197340)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _196400, [], _197340)
^  Unify: (259) [user] subst_vars(";; Original:", _196400, [], _197340)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _196400, [], _197340)
^  Unify: (259) [user] subst_vars(";; Original:", _196400, [], _197340)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _196400, [], _197340)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1350, 0], _196402, [], _181464)
^  Unify: (259) [user] subst_vars([1350, 0], [1350, 0], [], [])
   Call: (260) [system] var([1350, 0])
^  Redo: (259) [user] subst_vars([1350, 0], _196402, [], _181464)
^  Unify: (259) [user] subst_vars([1350, 0], [_212272|_212274], [], _181464)
^  Call: (260) [user] subst_vars(1350, _212272, [], _213212)
^  Unify: (260) [user] subst_vars(1350, 1350, [], [])
   Call: (261) [system] var(1350)
^  Redo: (260) [user] subst_vars(1350, _212272, [], _213212)
^  Unify: (260) [user] subst_vars(1350, _212272, [], _213212)
   Call: (261) [system] atom(1350)
^  Redo: (260) [user] subst_vars(1350, _212272, [], _213212)
^  Unify: (260) [user] subst_vars(1350, _212272, [], _213212)
   Call: (261) [system] compound(1350)
^  Redo: (260) [user] subst_vars(1350, _212272, [], _213212)
^  Unify: (260) [user] subst_vars(1350, 1350, [], [])
^  Exit: (260) [user] subst_vars(1350, 1350, [], [])
^  Call: (260) [user] subst_vars([0], _212274, [], _181464)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _212274, [], _181464)
^  Unify: (260) [user] subst_vars([0], [_228144|_228146], [], _181464)
^  Call: (261) [user] subst_vars(0, _228144, [], _229084)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _228144, [], _229084)
^  Unify: (261) [user] subst_vars(0, _228144, [], _229084)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _228144, [], _229084)
^  Unify: (261) [user] subst_vars(0, _228144, [], _229084)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _228144, [], _229084)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _228146, [], _181464)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _228146, [], _181464)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1350, 0], [1350, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1350, 0], [";; Original:", 1350, 0], [], [])
   Call: (258) [system] compound_name_arguments(_181462, '$COMMENT', [";; Original:", 1350, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1350, 0), '$COMMENT', [";; Original:", 1350, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1350, 0), '$COMMENT'(";; Original:", 1350, 0), [], [])
   Call: (257) [system] _251502=metta_file_buffer(+, '$COMMENT'(";; Original:", 1350, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1350, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1350, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1350, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1350, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1350, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1350, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1350, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1350, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1351, 0, 48404, '$COMMENT'(";;    #[test]", 1351, 0), '$stream_position'(48404, 1351, 0, 48438)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1351, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1351, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1351, 0), _304220))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1351, 0), _304220))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1351, 0), _304220)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1351, 0), _304220)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1351, 0), _304220)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1351, 0), _304220)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1351, 0), _309832))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1351, 0), _309832))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1351, 0), _309832))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1351, 0), _309832))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1351, 0), _309832)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1351, 0), _309832)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    #[test]", 1351, 0), _315418))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1351, 0), _315418))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    #[test]", 1351, 0), _315418)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1351, 0), _315418)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1351, 0), _315418)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1351, 0), _315418)
   Call: (270) [system] var('$COMMENT'(";;    #[test]", 1351, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1351, 0), _315418)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1351, 0), '$VAR'(_322878))
   Call: (270) [system] atom('$COMMENT'(";;    #[test]", 1351, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1351, 0), _315418)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1351, 0), _315418)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1351, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1351, 0), _315418)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1351, 0), _315418)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1351, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1351, 0), _315418)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1351, 0), _315418)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1351, 0)==[_332158, _332164]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1351, 0), _315418)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1351, 0), _315418)
   Call: (270) [system] is_list('$COMMENT'(";;    #[test]", 1351, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1351, 0), _315418)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1351, 0), _315418)
   Call: (270) [system] string('$COMMENT'(";;    #[test]", 1351, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1351, 0), _315418)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1351, 0), _315418)
   Call: (270) [system] compound('$COMMENT'(";;    #[test]", 1351, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    #[test]", 1351, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1351, 0), _342360, _342362)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT', [";;    #[test]", 1351, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    #[test]", 1351, 0], _346102)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1351, 0], _346102)
   Call: (271) [apply] apply:maplist_([";;    #[test]", 1351, 0], _346102, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    #[test]", 1351, 0], [_348920|_348922], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    #[test]", _348920)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _348920)
   Call: (273) [system] var(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _348920)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", '$VAR'(_353566))
   Call: (273) [system] atom(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _348920)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _348920)
   Call: (273) [system] ";;    #[test]"==true
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _348920)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _348920)
   Call: (273) [system] ";;    #[test]"==false
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _348920)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _348920)
   Call: (273) [system] ";;    #[test]"==[_362846, _362852]
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _348920)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _348920)
   Call: (273) [system] is_list(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _348920)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _348920)
   Call: (273) [system] string(";;    #[test]")
   Exit: (273) [system] string(";;    #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _348920)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _348920)
   Call: (273) [system] compound(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _348920)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _348920)
^  Call: (273) [user] symbol(";;    #[test]")
^  Unify: (273) [user] symbol(";;    #[test]")
   Call: (274) [system] atom(";;    #[test]")
   Fail: (274) [system] atom(";;    #[test]")
^  Fail: (273) [user] symbol(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _348920)
   Call: (273) [system] ";;    #[test]"=_348920
   Exit: (273) [system] ";;    #[test]"=";;    #[test]"
^  Exit: (272) [user] mfix_vars1(";;    #[test]", ";;    #[test]")
   Call: (272) [apply] apply:maplist_([1351, 0], _348922, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1351, 0], [_386918|_386920], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1351, _386918)
^  Unify: (273) [user] mfix_vars1(1351, _386918)
   Call: (274) [system] var(1351)
^  Redo: (273) [user] mfix_vars1(1351, _386918)
^  Unify: (273) [user] mfix_vars1(1351, '$VAR'(_391564))
   Call: (274) [system] atom(1351)
^  Redo: (273) [user] mfix_vars1(1351, _386918)
^  Unify: (273) [user] mfix_vars1(1351, _386918)
   Call: (274) [system] 1351==true
^  Redo: (273) [user] mfix_vars1(1351, _386918)
^  Unify: (273) [user] mfix_vars1(1351, _386918)
   Call: (274) [system] 1351==false
^  Redo: (273) [user] mfix_vars1(1351, _386918)
^  Unify: (273) [user] mfix_vars1(1351, _386918)
   Call: (274) [system] 1351==[_400844, _400850]
^  Redo: (273) [user] mfix_vars1(1351, _386918)
^  Unify: (273) [user] mfix_vars1(1351, _386918)
   Call: (274) [system] is_list(1351)
^  Redo: (273) [user] mfix_vars1(1351, _386918)
^  Unify: (273) [user] mfix_vars1(1351, _386918)
   Call: (274) [system] string(1351)
^  Redo: (273) [user] mfix_vars1(1351, _386918)
^  Unify: (273) [user] mfix_vars1(1351, _386918)
   Call: (274) [system] compound(1351)
^  Redo: (273) [user] mfix_vars1(1351, _386918)
^  Unify: (273) [user] mfix_vars1(1351, _386918)
^  Call: (274) [user] symbol(1351)
^  Unify: (274) [user] symbol(1351)
   Call: (275) [system] atom(1351)
   Fail: (275) [system] atom(1351)
^  Fail: (274) [user] symbol(1351)
^  Redo: (273) [user] mfix_vars1(1351, _386918)
   Call: (274) [system] 1351=_386918
   Exit: (274) [system] 1351=1351
^  Exit: (273) [user] mfix_vars1(1351, 1351)
   Call: (273) [apply] apply:maplist_([0], _386920, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_421244|_421246], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _421244)
^  Unify: (274) [user] mfix_vars1(0, _421244)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _421244)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_425890))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _421244)
^  Unify: (274) [user] mfix_vars1(0, _421244)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _421244)
^  Unify: (274) [user] mfix_vars1(0, _421244)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _421244)
^  Unify: (274) [user] mfix_vars1(0, _421244)
   Call: (275) [system] 0==[_435170, _435176]
^  Redo: (274) [user] mfix_vars1(0, _421244)
^  Unify: (274) [user] mfix_vars1(0, _421244)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _421244)
^  Unify: (274) [user] mfix_vars1(0, _421244)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _421244)
^  Unify: (274) [user] mfix_vars1(0, _421244)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _421244)
^  Unify: (274) [user] mfix_vars1(0, _421244)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _421244)
   Call: (275) [system] 0=_421244
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _421246, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1351, 0], [1351, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    #[test]", 1351, 0], [";;    #[test]", 1351, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1351, 0], [";;    #[test]", 1351, 0])
   Call: (270) [system] compound_name_arguments(_315418, '$COMMENT', [";;    #[test]", 1351, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT', [";;    #[test]", 1351, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1351, 0)\=@='$COMMENT'(";;    #[test]", 1351, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1351, 0), _309832)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    #[test]", 1351, 0), _471418))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1351, 0), _471418))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1351, 0), _471418))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1351, 0), _471418))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1351, 0), _471418)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1351, 0), _471418)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    #[test]", 1351, 0), _477004))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1351, 0), _477004))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    #[test]", 1351, 0), _477004)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1351, 0), _477004)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1351, 0), _477004)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1351, 0)\=@='$COMMENT'(";;    #[test]", 1351, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1351, 0), _471418)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    #[test]", 1351, 0), _304220))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1351, 0), _304220))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1351, 0), _304220))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1351, 0), _304220))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1351, 0), _304220)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1351, 0), _304220)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    #[test]", 1351, 0), _499324))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1351, 0), _499324))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    #[test]", 1351, 0), _499324)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1351, 0), _499324)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1351, 0), _499324)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1351, 0)\=@='$COMMENT'(";;    #[test]", 1351, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1351, 0), _304220)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0)))
   Call: (261) [system] '$COMMENT'(";;    #[test]", 1351, 0)\=@='$COMMENT'(";;    #[test]", 1351, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1351, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1351, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1351, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1351, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1351, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1351, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1351, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1351, 0), _10154, [], _10156)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    #[test]", 1351, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1351, 0), _10154, [], _10156)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1351, 0), _10154, [], _10156)
   Call: (258) [system] atom('$COMMENT'(";;    #[test]", 1351, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1351, 0), _10154, [], _10156)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1351, 0), _10154, [], _10156)
   Call: (258) [system] compound('$COMMENT'(";;    #[test]", 1351, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    #[test]", 1351, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1351, 0), _19470, _19472)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT', [";;    #[test]", 1351, 0])
^  Call: (258) [user] subst_vars([";;    #[test]", 1351, 0], _21356, [], _10156)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1351, 0], [";;    #[test]", 1351, 0], [], [])
   Call: (259) [system] var([";;    #[test]", 1351, 0])
^  Redo: (258) [user] subst_vars([";;    #[test]", 1351, 0], _21356, [], _10156)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1351, 0], [_25092|_25094], [], _10156)
^  Call: (259) [user] subst_vars(";;    #[test]", _25092, [], _26032)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
   Call: (260) [system] var(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _25092, [], _26032)
^  Unify: (259) [user] subst_vars(";;    #[test]", _25092, [], _26032)
   Call: (260) [system] atom(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _25092, [], _26032)
^  Unify: (259) [user] subst_vars(";;    #[test]", _25092, [], _26032)
   Call: (260) [system] compound(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _25092, [], _26032)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Exit: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Call: (259) [user] subst_vars([1351, 0], _25094, [], _10156)
^  Unify: (259) [user] subst_vars([1351, 0], [1351, 0], [], [])
   Call: (260) [system] var([1351, 0])
^  Redo: (259) [user] subst_vars([1351, 0], _25094, [], _10156)
^  Unify: (259) [user] subst_vars([1351, 0], [_40964|_40966], [], _10156)
^  Call: (260) [user] subst_vars(1351, _40964, [], _41904)
^  Unify: (260) [user] subst_vars(1351, 1351, [], [])
   Call: (261) [system] var(1351)
^  Redo: (260) [user] subst_vars(1351, _40964, [], _41904)
^  Unify: (260) [user] subst_vars(1351, _40964, [], _41904)
   Call: (261) [system] atom(1351)
^  Redo: (260) [user] subst_vars(1351, _40964, [], _41904)
^  Unify: (260) [user] subst_vars(1351, _40964, [], _41904)
   Call: (261) [system] compound(1351)
^  Redo: (260) [user] subst_vars(1351, _40964, [], _41904)
^  Unify: (260) [user] subst_vars(1351, 1351, [], [])
^  Exit: (260) [user] subst_vars(1351, 1351, [], [])
^  Call: (260) [user] subst_vars([0], _40966, [], _10156)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _40966, [], _10156)
^  Unify: (260) [user] subst_vars([0], [_56836|_56838], [], _10156)
^  Call: (261) [user] subst_vars(0, _56836, [], _57776)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _56836, [], _57776)
^  Unify: (261) [user] subst_vars(0, _56836, [], _57776)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _56836, [], _57776)
^  Unify: (261) [user] subst_vars(0, _56836, [], _57776)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _56836, [], _57776)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _56838, [], _10156)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _56838, [], _10156)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1351, 0], [1351, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    #[test]", 1351, 0], [";;    #[test]", 1351, 0], [], [])
   Call: (258) [system] compound_name_arguments(_10154, '$COMMENT', [";;    #[test]", 1351, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT', [";;    #[test]", 1351, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1351, 0), '$COMMENT'(";;    #[test]", 1351, 0), [], [])
   Call: (257) [system] _80194=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1351, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1351, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1351, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1351, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1351, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1351, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1351, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1351, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1351, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1352, 0, 48418, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$stream_position'(48418, 1352, 0, 48452)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _132916))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _132916))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _132916)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _132916)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _132916)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _132916)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _138528))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _138528))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _138528))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _138528))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _138528)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _138528)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _144114))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _144114))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _144114)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _144114)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _144114)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _144114)
   Call: (270) [system] var('$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _144114)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$VAR'(_151574))
   Call: (270) [system] atom('$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _144114)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _144114)
   Call: (270) [system] '$COMMENT'(";;    fn let_var_op() {", 1352, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _144114)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _144114)
   Call: (270) [system] '$COMMENT'(";;    fn let_var_op() {", 1352, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _144114)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _144114)
   Call: (270) [system] '$COMMENT'(";;    fn let_var_op() {", 1352, 0)==[_160854, _160860]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _144114)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _144114)
   Call: (270) [system] is_list('$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _144114)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _144114)
   Call: (270) [system] string('$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _144114)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _144114)
   Call: (270) [system] compound('$COMMENT'(";;    fn let_var_op() {", 1352, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    fn let_var_op() {", 1352, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _171056, _171058)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT', [";;    fn let_var_op() {", 1352, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    fn let_var_op() {", 1352, 0], _174798)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn let_var_op() {", 1352, 0], _174798)
   Call: (271) [apply] apply:maplist_([";;    fn let_var_op() {", 1352, 0], _174798, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    fn let_var_op() {", 1352, 0], [_177616|_177618], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    fn let_var_op() {", _177616)
^  Unify: (272) [user] mfix_vars1(";;    fn let_var_op() {", _177616)
   Call: (273) [system] var(";;    fn let_var_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_var_op() {", _177616)
^  Unify: (272) [user] mfix_vars1(";;    fn let_var_op() {", '$VAR'(_182262))
   Call: (273) [system] atom(";;    fn let_var_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_var_op() {", _177616)
^  Unify: (272) [user] mfix_vars1(";;    fn let_var_op() {", _177616)
   Call: (273) [system] ";;    fn let_var_op() {"==true
^  Redo: (272) [user] mfix_vars1(";;    fn let_var_op() {", _177616)
^  Unify: (272) [user] mfix_vars1(";;    fn let_var_op() {", _177616)
   Call: (273) [system] ";;    fn let_var_op() {"==false
^  Redo: (272) [user] mfix_vars1(";;    fn let_var_op() {", _177616)
^  Unify: (272) [user] mfix_vars1(";;    fn let_var_op() {", _177616)
   Call: (273) [system] ";;    fn let_var_op() {"==[_191542, _191548]
^  Redo: (272) [user] mfix_vars1(";;    fn let_var_op() {", _177616)
^  Unify: (272) [user] mfix_vars1(";;    fn let_var_op() {", _177616)
   Call: (273) [system] is_list(";;    fn let_var_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_var_op() {", _177616)
^  Unify: (272) [user] mfix_vars1(";;    fn let_var_op() {", _177616)
   Call: (273) [system] string(";;    fn let_var_op() {")
   Exit: (273) [system] string(";;    fn let_var_op() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    fn let_var_op() {", _177616)
^  Unify: (272) [user] mfix_vars1(";;    fn let_var_op() {", _177616)
   Call: (273) [system] compound(";;    fn let_var_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_var_op() {", _177616)
^  Unify: (272) [user] mfix_vars1(";;    fn let_var_op() {", _177616)
^  Call: (273) [user] symbol(";;    fn let_var_op() {")
^  Unify: (273) [user] symbol(";;    fn let_var_op() {")
   Call: (274) [system] atom(";;    fn let_var_op() {")
   Fail: (274) [system] atom(";;    fn let_var_op() {")
^  Fail: (273) [user] symbol(";;    fn let_var_op() {")
^  Redo: (272) [user] mfix_vars1(";;    fn let_var_op() {", _177616)
   Call: (273) [system] ";;    fn let_var_op() {"=_177616
   Exit: (273) [system] ";;    fn let_var_op() {"=";;    fn let_var_op() {"
^  Exit: (272) [user] mfix_vars1(";;    fn let_var_op() {", ";;    fn let_var_op() {")
   Call: (272) [apply] apply:maplist_([1352, 0], _177618, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1352, 0], [_215614|_215616], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1352, _215614)
^  Unify: (273) [user] mfix_vars1(1352, _215614)
   Call: (274) [system] var(1352)
^  Redo: (273) [user] mfix_vars1(1352, _215614)
^  Unify: (273) [user] mfix_vars1(1352, '$VAR'(_220260))
   Call: (274) [system] atom(1352)
^  Redo: (273) [user] mfix_vars1(1352, _215614)
^  Unify: (273) [user] mfix_vars1(1352, _215614)
   Call: (274) [system] 1352==true
^  Redo: (273) [user] mfix_vars1(1352, _215614)
^  Unify: (273) [user] mfix_vars1(1352, _215614)
   Call: (274) [system] 1352==false
^  Redo: (273) [user] mfix_vars1(1352, _215614)
^  Unify: (273) [user] mfix_vars1(1352, _215614)
   Call: (274) [system] 1352==[_229540, _229546]
^  Redo: (273) [user] mfix_vars1(1352, _215614)
^  Unify: (273) [user] mfix_vars1(1352, _215614)
   Call: (274) [system] is_list(1352)
^  Redo: (273) [user] mfix_vars1(1352, _215614)
^  Unify: (273) [user] mfix_vars1(1352, _215614)
   Call: (274) [system] string(1352)
^  Redo: (273) [user] mfix_vars1(1352, _215614)
^  Unify: (273) [user] mfix_vars1(1352, _215614)
   Call: (274) [system] compound(1352)
^  Redo: (273) [user] mfix_vars1(1352, _215614)
^  Unify: (273) [user] mfix_vars1(1352, _215614)
^  Call: (274) [user] symbol(1352)
^  Unify: (274) [user] symbol(1352)
   Call: (275) [system] atom(1352)
   Fail: (275) [system] atom(1352)
^  Fail: (274) [user] symbol(1352)
^  Redo: (273) [user] mfix_vars1(1352, _215614)
   Call: (274) [system] 1352=_215614
   Exit: (274) [system] 1352=1352
^  Exit: (273) [user] mfix_vars1(1352, 1352)
   Call: (273) [apply] apply:maplist_([0], _215616, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_249940|_249942], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _249940)
^  Unify: (274) [user] mfix_vars1(0, _249940)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _249940)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_254586))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _249940)
^  Unify: (274) [user] mfix_vars1(0, _249940)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _249940)
^  Unify: (274) [user] mfix_vars1(0, _249940)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _249940)
^  Unify: (274) [user] mfix_vars1(0, _249940)
   Call: (275) [system] 0==[_263866, _263872]
^  Redo: (274) [user] mfix_vars1(0, _249940)
^  Unify: (274) [user] mfix_vars1(0, _249940)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _249940)
^  Unify: (274) [user] mfix_vars1(0, _249940)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _249940)
^  Unify: (274) [user] mfix_vars1(0, _249940)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _249940)
^  Unify: (274) [user] mfix_vars1(0, _249940)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _249940)
   Call: (275) [system] 0=_249940
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _249942, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1352, 0], [1352, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    fn let_var_op() {", 1352, 0], [";;    fn let_var_op() {", 1352, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn let_var_op() {", 1352, 0], [";;    fn let_var_op() {", 1352, 0])
   Call: (270) [system] compound_name_arguments(_144114, '$COMMENT', [";;    fn let_var_op() {", 1352, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT', [";;    fn let_var_op() {", 1352, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn let_var_op() {", 1352, 0)\=@='$COMMENT'(";;    fn let_var_op() {", 1352, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _138528)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _300114))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _300114))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _300114))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _300114))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _300114)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _300114)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _305700))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _305700))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _305700)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _305700)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _305700)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn let_var_op() {", 1352, 0)\=@='$COMMENT'(";;    fn let_var_op() {", 1352, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _300114)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _132916))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _132916))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _132916))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _132916))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _132916)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _132916)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _328020))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _328020))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _328020)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _328020)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _328020)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn let_var_op() {", 1352, 0)\=@='$COMMENT'(";;    fn let_var_op() {", 1352, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _132916)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0)))
   Call: (261) [system] '$COMMENT'(";;    fn let_var_op() {", 1352, 0)\=@='$COMMENT'(";;    fn let_var_op() {", 1352, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _356798, [], _356800)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _356798, [], _356800)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _356798, [], _356800)
   Call: (258) [system] atom('$COMMENT'(";;    fn let_var_op() {", 1352, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _356798, [], _356800)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _356798, [], _356800)
   Call: (258) [system] compound('$COMMENT'(";;    fn let_var_op() {", 1352, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    fn let_var_op() {", 1352, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    fn let_var_op() {", 1352, 0), _366114, _366116)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT', [";;    fn let_var_op() {", 1352, 0])
^  Call: (258) [user] subst_vars([";;    fn let_var_op() {", 1352, 0], _368000, [], _356800)
^  Unify: (258) [user] subst_vars([";;    fn let_var_op() {", 1352, 0], [";;    fn let_var_op() {", 1352, 0], [], [])
   Call: (259) [system] var([";;    fn let_var_op() {", 1352, 0])
^  Redo: (258) [user] subst_vars([";;    fn let_var_op() {", 1352, 0], _368000, [], _356800)
^  Unify: (258) [user] subst_vars([";;    fn let_var_op() {", 1352, 0], [_371736|_371738], [], _356800)
^  Call: (259) [user] subst_vars(";;    fn let_var_op() {", _371736, [], _372676)
^  Unify: (259) [user] subst_vars(";;    fn let_var_op() {", ";;    fn let_var_op() {", [], [])
   Call: (260) [system] var(";;    fn let_var_op() {")
^  Redo: (259) [user] subst_vars(";;    fn let_var_op() {", _371736, [], _372676)
^  Unify: (259) [user] subst_vars(";;    fn let_var_op() {", _371736, [], _372676)
   Call: (260) [system] atom(";;    fn let_var_op() {")
^  Redo: (259) [user] subst_vars(";;    fn let_var_op() {", _371736, [], _372676)
^  Unify: (259) [user] subst_vars(";;    fn let_var_op() {", _371736, [], _372676)
   Call: (260) [system] compound(";;    fn let_var_op() {")
^  Redo: (259) [user] subst_vars(";;    fn let_var_op() {", _371736, [], _372676)
^  Unify: (259) [user] subst_vars(";;    fn let_var_op() {", ";;    fn let_var_op() {", [], [])
^  Exit: (259) [user] subst_vars(";;    fn let_var_op() {", ";;    fn let_var_op() {", [], [])
^  Call: (259) [user] subst_vars([1352, 0], _371738, [], _356800)
^  Unify: (259) [user] subst_vars([1352, 0], [1352, 0], [], [])
   Call: (260) [system] var([1352, 0])
^  Redo: (259) [user] subst_vars([1352, 0], _371738, [], _356800)
^  Unify: (259) [user] subst_vars([1352, 0], [_387608|_387610], [], _356800)
^  Call: (260) [user] subst_vars(1352, _387608, [], _388548)
^  Unify: (260) [user] subst_vars(1352, 1352, [], [])
   Call: (261) [system] var(1352)
^  Redo: (260) [user] subst_vars(1352, _387608, [], _388548)
^  Unify: (260) [user] subst_vars(1352, _387608, [], _388548)
   Call: (261) [system] atom(1352)
^  Redo: (260) [user] subst_vars(1352, _387608, [], _388548)
^  Unify: (260) [user] subst_vars(1352, _387608, [], _388548)
   Call: (261) [system] compound(1352)
^  Redo: (260) [user] subst_vars(1352, _387608, [], _388548)
^  Unify: (260) [user] subst_vars(1352, 1352, [], [])
^  Exit: (260) [user] subst_vars(1352, 1352, [], [])
^  Call: (260) [user] subst_vars([0], _387610, [], _356800)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _387610, [], _356800)
^  Unify: (260) [user] subst_vars([0], [_403480|_403482], [], _356800)
^  Call: (261) [user] subst_vars(0, _403480, [], _404420)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _403480, [], _404420)
^  Unify: (261) [user] subst_vars(0, _403480, [], _404420)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _403480, [], _404420)
^  Unify: (261) [user] subst_vars(0, _403480, [], _404420)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _403480, [], _404420)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _403482, [], _356800)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _403482, [], _356800)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1352, 0], [1352, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    fn let_var_op() {", 1352, 0], [";;    fn let_var_op() {", 1352, 0], [], [])
   Call: (258) [system] compound_name_arguments(_356798, '$COMMENT', [";;    fn let_var_op() {", 1352, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT', [";;    fn let_var_op() {", 1352, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    fn let_var_op() {", 1352, 0), '$COMMENT'(";;    fn let_var_op() {", 1352, 0), [], [])
   Call: (257) [system] _426838=metta_file_buffer(+, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn let_var_op() {", 1352, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1353, 0, 48442, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$stream_position'(48442, 1353, 0, 48476)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _479572))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _479572))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _479572)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _479572)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _479572)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _479572)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _485184))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _485184))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _485184))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _485184))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _485184)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _485184)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _490770))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _490770))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _490770)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _490770)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _490770)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _490770)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _490770)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$VAR'(_498230))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _490770)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _490770)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _490770)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _490770)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _490770)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _490770)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0)==[_507510, _507516]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _490770)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _490770)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _490770)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _490770)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _490770)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _490770)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _517712, _517714)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT', [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0], _521454)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0], _521454)
   Call: (271) [apply] apply:maplist_([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0], _6030, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0], [_6400|_6402], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _6400)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _6400)
   Call: (273) [system] var(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _6400)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", '$VAR'(_11046))
   Call: (273) [system] atom(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _6400)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _6400)
   Call: (273) [system] ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _6400)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _6400)
   Call: (273) [system] ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _6400)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _6400)
   Call: (273) [system] ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),"==[_20326, _20332]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _6400)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _6400)
   Call: (273) [system] is_list(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _6400)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _6400)
   Call: (273) [system] string(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),")
   Exit: (273) [system] string(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _6400)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _6400)
   Call: (273) [system] compound(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _6400)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _6400)
^  Call: (273) [user] symbol(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),")
^  Unify: (273) [user] symbol(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),")
   Call: (274) [system] atom(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),")
   Fail: (274) [system] atom(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),")
^  Fail: (273) [user] symbol(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _6400)
   Call: (273) [system] ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),"=_6400
   Exit: (273) [system] ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),"=";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),")
   Call: (272) [apply] apply:maplist_([1353, 0], _6402, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1353, 0], [_44398|_44400], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1353, _44398)
^  Unify: (273) [user] mfix_vars1(1353, _44398)
   Call: (274) [system] var(1353)
^  Redo: (273) [user] mfix_vars1(1353, _44398)
^  Unify: (273) [user] mfix_vars1(1353, '$VAR'(_49044))
   Call: (274) [system] atom(1353)
^  Redo: (273) [user] mfix_vars1(1353, _44398)
^  Unify: (273) [user] mfix_vars1(1353, _44398)
   Call: (274) [system] 1353==true
^  Redo: (273) [user] mfix_vars1(1353, _44398)
^  Unify: (273) [user] mfix_vars1(1353, _44398)
   Call: (274) [system] 1353==false
^  Redo: (273) [user] mfix_vars1(1353, _44398)
^  Unify: (273) [user] mfix_vars1(1353, _44398)
   Call: (274) [system] 1353==[_58324, _58330]
^  Redo: (273) [user] mfix_vars1(1353, _44398)
^  Unify: (273) [user] mfix_vars1(1353, _44398)
   Call: (274) [system] is_list(1353)
^  Redo: (273) [user] mfix_vars1(1353, _44398)
^  Unify: (273) [user] mfix_vars1(1353, _44398)
   Call: (274) [system] string(1353)
^  Redo: (273) [user] mfix_vars1(1353, _44398)
^  Unify: (273) [user] mfix_vars1(1353, _44398)
   Call: (274) [system] compound(1353)
^  Redo: (273) [user] mfix_vars1(1353, _44398)
^  Unify: (273) [user] mfix_vars1(1353, _44398)
^  Call: (274) [user] symbol(1353)
^  Unify: (274) [user] symbol(1353)
   Call: (275) [system] atom(1353)
   Fail: (275) [system] atom(1353)
^  Fail: (274) [user] symbol(1353)
^  Redo: (273) [user] mfix_vars1(1353, _44398)
   Call: (274) [system] 1353=_44398
   Exit: (274) [system] 1353=1353
^  Exit: (273) [user] mfix_vars1(1353, 1353)
   Call: (273) [apply] apply:maplist_([0], _44400, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_78724|_78726], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _78724)
^  Unify: (274) [user] mfix_vars1(0, _78724)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _78724)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_83370))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _78724)
^  Unify: (274) [user] mfix_vars1(0, _78724)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _78724)
^  Unify: (274) [user] mfix_vars1(0, _78724)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _78724)
^  Unify: (274) [user] mfix_vars1(0, _78724)
   Call: (275) [system] 0==[_92650, _92656]
^  Redo: (274) [user] mfix_vars1(0, _78724)
^  Unify: (274) [user] mfix_vars1(0, _78724)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _78724)
^  Unify: (274) [user] mfix_vars1(0, _78724)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _78724)
^  Unify: (274) [user] mfix_vars1(0, _78724)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _78724)
^  Unify: (274) [user] mfix_vars1(0, _78724)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _78724)
   Call: (275) [system] 0=_78724
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _78726, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1353, 0], [1353, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0], [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0], [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0])
   Call: (270) [system] compound_name_arguments(_5994, '$COMMENT', [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT', [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0)\=@='$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _5980)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _128898))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _128898))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _128898))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _128898))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _128898)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _128898)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _134484))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _134484))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _134484)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _134484)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _134484)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0)\=@='$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _128898)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _5960))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _5960))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _5960))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _5960))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _5960)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _5960)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _156804))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _156804))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _156804)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _156804)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _156804)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0)\=@='$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _5960)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0)\=@='$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _185582, [], _185584)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _185582, [], _185584)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _185582, [], _185584)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _185582, [], _185584)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _185582, [], _185584)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), _194898, _194900)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT', [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0], _196784, [], _185584)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0], [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0], [], [])
   Call: (259) [system] var([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0], _196784, [], _185584)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0], [_200520|_200522], [], _185584)
^  Call: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _200520, [], _201460)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", [], [])
   Call: (260) [system] var(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _200520, [], _201460)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _200520, [], _201460)
   Call: (260) [system] atom(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _200520, [], _201460)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _200520, [], _201460)
   Call: (260) [system] compound(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", _200520, [], _201460)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", [], [])
^  Call: (259) [user] subst_vars([1353, 0], _200522, [], _185584)
^  Unify: (259) [user] subst_vars([1353, 0], [1353, 0], [], [])
   Call: (260) [system] var([1353, 0])
^  Redo: (259) [user] subst_vars([1353, 0], _200522, [], _185584)
^  Unify: (259) [user] subst_vars([1353, 0], [_216392|_216394], [], _185584)
^  Call: (260) [user] subst_vars(1353, _216392, [], _217332)
^  Unify: (260) [user] subst_vars(1353, 1353, [], [])
   Call: (261) [system] var(1353)
^  Redo: (260) [user] subst_vars(1353, _216392, [], _217332)
^  Unify: (260) [user] subst_vars(1353, _216392, [], _217332)
   Call: (261) [system] atom(1353)
^  Redo: (260) [user] subst_vars(1353, _216392, [], _217332)
^  Unify: (260) [user] subst_vars(1353, _216392, [], _217332)
   Call: (261) [system] compound(1353)
^  Redo: (260) [user] subst_vars(1353, _216392, [], _217332)
^  Unify: (260) [user] subst_vars(1353, 1353, [], [])
^  Exit: (260) [user] subst_vars(1353, 1353, [], [])
^  Call: (260) [user] subst_vars([0], _216394, [], _185584)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _216394, [], _185584)
^  Unify: (260) [user] subst_vars([0], [_232264|_232266], [], _185584)
^  Call: (261) [user] subst_vars(0, _232264, [], _233204)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _232264, [], _233204)
^  Unify: (261) [user] subst_vars(0, _232264, [], _233204)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _232264, [], _233204)
^  Unify: (261) [user] subst_vars(0, _232264, [], _233204)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _232264, [], _233204)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _232266, [], _185584)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _232266, [], _185584)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1353, 0], [1353, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0], [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0], [], [])
   Call: (258) [system] compound_name_arguments(_185582, '$COMMENT', [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT', [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), [], [])
   Call: (257) [system] _255622=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(), sym!(\"B\")]),", 1353, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1354, 0, 48514, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$stream_position'(48514, 1354, 0, 48548)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _308346))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _308346))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _308346)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _308346)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _308346)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _308346)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _313958))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _313958))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _313958))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _313958))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _313958)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _313958)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _319544))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _319544))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _319544)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _319544)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _319544)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _319544)
   Call: (270) [system] var('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _319544)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$VAR'(_327004))
   Call: (270) [system] atom('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _319544)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _319544)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _319544)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _319544)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _319544)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _319544)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0)==[_336284, _336290]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _319544)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _319544)
   Call: (270) [system] is_list('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _319544)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _319544)
   Call: (270) [system] string('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _319544)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _319544)
   Call: (270) [system] compound('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _346486, _346488)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT', [";;            Ok(vec![sym!(\"B\")]));", 1354, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            Ok(vec![sym!(\"B\")]));", 1354, 0], _350228)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            Ok(vec![sym!(\"B\")]));", 1354, 0], _350228)
   Call: (271) [apply] apply:maplist_([";;            Ok(vec![sym!(\"B\")]));", 1354, 0], _350228, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            Ok(vec![sym!(\"B\")]));", 1354, 0], [_353046|_353048], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            Ok(vec![sym!(\"B\")]));", _353046)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![sym!(\"B\")]));", _353046)
   Call: (273) [system] var(";;            Ok(vec![sym!(\"B\")]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![sym!(\"B\")]));", _353046)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![sym!(\"B\")]));", '$VAR'(_357692))
   Call: (273) [system] atom(";;            Ok(vec![sym!(\"B\")]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![sym!(\"B\")]));", _353046)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![sym!(\"B\")]));", _353046)
   Call: (273) [system] ";;            Ok(vec![sym!(\"B\")]));"==true
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![sym!(\"B\")]));", _353046)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![sym!(\"B\")]));", _353046)
   Call: (273) [system] ";;            Ok(vec![sym!(\"B\")]));"==false
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![sym!(\"B\")]));", _353046)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![sym!(\"B\")]));", _353046)
   Call: (273) [system] ";;            Ok(vec![sym!(\"B\")]));"==[_366972, _366978]
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![sym!(\"B\")]));", _353046)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![sym!(\"B\")]));", _353046)
   Call: (273) [system] is_list(";;            Ok(vec![sym!(\"B\")]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![sym!(\"B\")]));", _353046)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![sym!(\"B\")]));", _353046)
   Call: (273) [system] string(";;            Ok(vec![sym!(\"B\")]));")
   Exit: (273) [system] string(";;            Ok(vec![sym!(\"B\")]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![sym!(\"B\")]));", _353046)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![sym!(\"B\")]));", _353046)
   Call: (273) [system] compound(";;            Ok(vec![sym!(\"B\")]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![sym!(\"B\")]));", _353046)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![sym!(\"B\")]));", _353046)
^  Call: (273) [user] symbol(";;            Ok(vec![sym!(\"B\")]));")
^  Unify: (273) [user] symbol(";;            Ok(vec![sym!(\"B\")]));")
   Call: (274) [system] atom(";;            Ok(vec![sym!(\"B\")]));")
   Fail: (274) [system] atom(";;            Ok(vec![sym!(\"B\")]));")
^  Fail: (273) [user] symbol(";;            Ok(vec![sym!(\"B\")]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![sym!(\"B\")]));", _353046)
   Call: (273) [system] ";;            Ok(vec![sym!(\"B\")]));"=_353046
   Exit: (273) [system] ";;            Ok(vec![sym!(\"B\")]));"=";;            Ok(vec![sym!(\"B\")]));"
^  Exit: (272) [user] mfix_vars1(";;            Ok(vec![sym!(\"B\")]));", ";;            Ok(vec![sym!(\"B\")]));")
   Call: (272) [apply] apply:maplist_([1354, 0], _353048, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1354, 0], [_391044|_391046], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1354, _391044)
^  Unify: (273) [user] mfix_vars1(1354, _391044)
   Call: (274) [system] var(1354)
^  Redo: (273) [user] mfix_vars1(1354, _391044)
^  Unify: (273) [user] mfix_vars1(1354, '$VAR'(_395690))
   Call: (274) [system] atom(1354)
^  Redo: (273) [user] mfix_vars1(1354, _391044)
^  Unify: (273) [user] mfix_vars1(1354, _391044)
   Call: (274) [system] 1354==true
^  Redo: (273) [user] mfix_vars1(1354, _391044)
^  Unify: (273) [user] mfix_vars1(1354, _391044)
   Call: (274) [system] 1354==false
^  Redo: (273) [user] mfix_vars1(1354, _391044)
^  Unify: (273) [user] mfix_vars1(1354, _391044)
   Call: (274) [system] 1354==[_404970, _404976]
^  Redo: (273) [user] mfix_vars1(1354, _391044)
^  Unify: (273) [user] mfix_vars1(1354, _391044)
   Call: (274) [system] is_list(1354)
^  Redo: (273) [user] mfix_vars1(1354, _391044)
^  Unify: (273) [user] mfix_vars1(1354, _391044)
   Call: (274) [system] string(1354)
^  Redo: (273) [user] mfix_vars1(1354, _391044)
^  Unify: (273) [user] mfix_vars1(1354, _391044)
   Call: (274) [system] compound(1354)
^  Redo: (273) [user] mfix_vars1(1354, _391044)
^  Unify: (273) [user] mfix_vars1(1354, _391044)
^  Call: (274) [user] symbol(1354)
^  Unify: (274) [user] symbol(1354)
   Call: (275) [system] atom(1354)
   Fail: (275) [system] atom(1354)
^  Fail: (274) [user] symbol(1354)
^  Redo: (273) [user] mfix_vars1(1354, _391044)
   Call: (274) [system] 1354=_391044
   Exit: (274) [system] 1354=1354
^  Exit: (273) [user] mfix_vars1(1354, 1354)
   Call: (273) [apply] apply:maplist_([0], _391046, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_425370|_425372], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _425370)
^  Unify: (274) [user] mfix_vars1(0, _425370)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _425370)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_430016))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _425370)
^  Unify: (274) [user] mfix_vars1(0, _425370)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _425370)
^  Unify: (274) [user] mfix_vars1(0, _425370)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _425370)
^  Unify: (274) [user] mfix_vars1(0, _425370)
   Call: (275) [system] 0==[_439296, _439302]
^  Redo: (274) [user] mfix_vars1(0, _425370)
^  Unify: (274) [user] mfix_vars1(0, _425370)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _425370)
^  Unify: (274) [user] mfix_vars1(0, _425370)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _425370)
^  Unify: (274) [user] mfix_vars1(0, _425370)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _425370)
^  Unify: (274) [user] mfix_vars1(0, _425370)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _425370)
   Call: (275) [system] 0=_425370
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _425372, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1354, 0], [1354, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            Ok(vec![sym!(\"B\")]));", 1354, 0], [";;            Ok(vec![sym!(\"B\")]));", 1354, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            Ok(vec![sym!(\"B\")]));", 1354, 0], [";;            Ok(vec![sym!(\"B\")]));", 1354, 0])
   Call: (270) [system] compound_name_arguments(_319544, '$COMMENT', [";;            Ok(vec![sym!(\"B\")]));", 1354, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT', [";;            Ok(vec![sym!(\"B\")]));", 1354, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0)\=@='$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _313958)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _475544))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _475544))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _475544))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _475544))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _475544)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _475544)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _481130))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _481130))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _481130)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _481130)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _481130)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0)\=@='$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _475544)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _308346))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _308346))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _308346))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _308346))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _308346)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _308346)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _503450))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _503450))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _503450)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _503450)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _503450)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0)\=@='$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _308346)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0)))
   Call: (261) [system] '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0)\=@='$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _14200, [], _14202)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _14200, [], _14202)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _14200, [], _14202)
   Call: (258) [system] atom('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _14200, [], _14202)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _14200, [], _14202)
   Call: (258) [system] compound('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), _23516, _23518)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT', [";;            Ok(vec![sym!(\"B\")]));", 1354, 0])
^  Call: (258) [user] subst_vars([";;            Ok(vec![sym!(\"B\")]));", 1354, 0], _25402, [], _14202)
^  Unify: (258) [user] subst_vars([";;            Ok(vec![sym!(\"B\")]));", 1354, 0], [";;            Ok(vec![sym!(\"B\")]));", 1354, 0], [], [])
   Call: (259) [system] var([";;            Ok(vec![sym!(\"B\")]));", 1354, 0])
^  Redo: (258) [user] subst_vars([";;            Ok(vec![sym!(\"B\")]));", 1354, 0], _25402, [], _14202)
^  Unify: (258) [user] subst_vars([";;            Ok(vec![sym!(\"B\")]));", 1354, 0], [_29138|_29140], [], _14202)
^  Call: (259) [user] subst_vars(";;            Ok(vec![sym!(\"B\")]));", _29138, [], _30078)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![sym!(\"B\")]));", ";;            Ok(vec![sym!(\"B\")]));", [], [])
   Call: (260) [system] var(";;            Ok(vec![sym!(\"B\")]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![sym!(\"B\")]));", _29138, [], _30078)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![sym!(\"B\")]));", _29138, [], _30078)
   Call: (260) [system] atom(";;            Ok(vec![sym!(\"B\")]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![sym!(\"B\")]));", _29138, [], _30078)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![sym!(\"B\")]));", _29138, [], _30078)
   Call: (260) [system] compound(";;            Ok(vec![sym!(\"B\")]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![sym!(\"B\")]));", _29138, [], _30078)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![sym!(\"B\")]));", ";;            Ok(vec![sym!(\"B\")]));", [], [])
^  Exit: (259) [user] subst_vars(";;            Ok(vec![sym!(\"B\")]));", ";;            Ok(vec![sym!(\"B\")]));", [], [])
^  Call: (259) [user] subst_vars([1354, 0], _29140, [], _14202)
^  Unify: (259) [user] subst_vars([1354, 0], [1354, 0], [], [])
   Call: (260) [system] var([1354, 0])
^  Redo: (259) [user] subst_vars([1354, 0], _29140, [], _14202)
^  Unify: (259) [user] subst_vars([1354, 0], [_45010|_45012], [], _14202)
^  Call: (260) [user] subst_vars(1354, _45010, [], _45950)
^  Unify: (260) [user] subst_vars(1354, 1354, [], [])
   Call: (261) [system] var(1354)
^  Redo: (260) [user] subst_vars(1354, _45010, [], _45950)
^  Unify: (260) [user] subst_vars(1354, _45010, [], _45950)
   Call: (261) [system] atom(1354)
^  Redo: (260) [user] subst_vars(1354, _45010, [], _45950)
^  Unify: (260) [user] subst_vars(1354, _45010, [], _45950)
   Call: (261) [system] compound(1354)
^  Redo: (260) [user] subst_vars(1354, _45010, [], _45950)
^  Unify: (260) [user] subst_vars(1354, 1354, [], [])
^  Exit: (260) [user] subst_vars(1354, 1354, [], [])
^  Call: (260) [user] subst_vars([0], _45012, [], _14202)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _45012, [], _14202)
^  Unify: (260) [user] subst_vars([0], [_60882|_60884], [], _14202)
^  Call: (261) [user] subst_vars(0, _60882, [], _61822)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _60882, [], _61822)
^  Unify: (261) [user] subst_vars(0, _60882, [], _61822)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _60882, [], _61822)
^  Unify: (261) [user] subst_vars(0, _60882, [], _61822)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _60882, [], _61822)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _60884, [], _14202)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _60884, [], _14202)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1354, 0], [1354, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            Ok(vec![sym!(\"B\")]));", 1354, 0], [";;            Ok(vec![sym!(\"B\")]));", 1354, 0], [], [])
   Call: (258) [system] compound_name_arguments(_14200, '$COMMENT', [";;            Ok(vec![sym!(\"B\")]));", 1354, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT', [";;            Ok(vec![sym!(\"B\")]));", 1354, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), [], [])
   Call: (257) [system] _84240=metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![sym!(\"B\")]));", 1354, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1355, 0, 48550, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$stream_position'(48550, 1355, 0, 48584)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _136976))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _136976))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _136976)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _136976)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _136976)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _136976)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _142588))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _142588))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _142588))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _142588))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _142588)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _142588)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _148174))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _148174))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _148174)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _148174)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _148174)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _148174)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _148174)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$VAR'(_155634))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _148174)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _148174)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _148174)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _148174)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _148174)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _148174)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0)==[_164914, _164920]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _148174)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _148174)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _148174)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _148174)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _148174)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _148174)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _175116, _175118)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT', [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0], _178858)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0], _178858)
   Call: (271) [apply] apply:maplist_([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0], _178858, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0], [_181676|_181678], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _181676)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _181676)
   Call: (273) [system] var(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _181676)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", '$VAR'(_186322))
   Call: (273) [system] atom(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _181676)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _181676)
   Call: (273) [system] ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _181676)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _181676)
   Call: (273) [system] ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _181676)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _181676)
   Call: (273) [system] ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),"==[_195602, _195608]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _181676)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _181676)
   Call: (273) [system] is_list(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _181676)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _181676)
   Call: (273) [system] string(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),")
   Exit: (273) [system] string(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _181676)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _181676)
   Call: (273) [system] compound(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _181676)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _181676)
^  Call: (273) [user] symbol(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),")
^  Unify: (273) [user] symbol(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),")
   Call: (274) [system] atom(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),")
   Fail: (274) [system] atom(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),")
^  Fail: (273) [user] symbol(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _181676)
   Call: (273) [system] ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),"=_181676
   Exit: (273) [system] ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),"=";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),")
   Call: (272) [apply] apply:maplist_([1355, 0], _181678, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1355, 0], [_219674|_219676], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1355, _219674)
^  Unify: (273) [user] mfix_vars1(1355, _219674)
   Call: (274) [system] var(1355)
^  Redo: (273) [user] mfix_vars1(1355, _219674)
^  Unify: (273) [user] mfix_vars1(1355, '$VAR'(_224320))
   Call: (274) [system] atom(1355)
^  Redo: (273) [user] mfix_vars1(1355, _219674)
^  Unify: (273) [user] mfix_vars1(1355, _219674)
   Call: (274) [system] 1355==true
^  Redo: (273) [user] mfix_vars1(1355, _219674)
^  Unify: (273) [user] mfix_vars1(1355, _219674)
   Call: (274) [system] 1355==false
^  Redo: (273) [user] mfix_vars1(1355, _219674)
^  Unify: (273) [user] mfix_vars1(1355, _219674)
   Call: (274) [system] 1355==[_233600, _233606]
^  Redo: (273) [user] mfix_vars1(1355, _219674)
^  Unify: (273) [user] mfix_vars1(1355, _219674)
   Call: (274) [system] is_list(1355)
^  Redo: (273) [user] mfix_vars1(1355, _219674)
^  Unify: (273) [user] mfix_vars1(1355, _219674)
   Call: (274) [system] string(1355)
^  Redo: (273) [user] mfix_vars1(1355, _219674)
^  Unify: (273) [user] mfix_vars1(1355, _219674)
   Call: (274) [system] compound(1355)
^  Redo: (273) [user] mfix_vars1(1355, _219674)
^  Unify: (273) [user] mfix_vars1(1355, _219674)
^  Call: (274) [user] symbol(1355)
^  Unify: (274) [user] symbol(1355)
   Call: (275) [system] atom(1355)
   Fail: (275) [system] atom(1355)
^  Fail: (274) [user] symbol(1355)
^  Redo: (273) [user] mfix_vars1(1355, _219674)
   Call: (274) [system] 1355=_219674
   Exit: (274) [system] 1355=1355
^  Exit: (273) [user] mfix_vars1(1355, 1355)
   Call: (273) [apply] apply:maplist_([0], _219676, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_254000|_254002], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _254000)
^  Unify: (274) [user] mfix_vars1(0, _254000)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _254000)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_258646))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _254000)
^  Unify: (274) [user] mfix_vars1(0, _254000)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _254000)
^  Unify: (274) [user] mfix_vars1(0, _254000)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _254000)
^  Unify: (274) [user] mfix_vars1(0, _254000)
   Call: (275) [system] 0==[_267926, _267932]
^  Redo: (274) [user] mfix_vars1(0, _254000)
^  Unify: (274) [user] mfix_vars1(0, _254000)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _254000)
^  Unify: (274) [user] mfix_vars1(0, _254000)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _254000)
^  Unify: (274) [user] mfix_vars1(0, _254000)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _254000)
^  Unify: (274) [user] mfix_vars1(0, _254000)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _254000)
   Call: (275) [system] 0=_254000
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _254002, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1355, 0], [1355, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0], [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0], [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0])
   Call: (270) [system] compound_name_arguments(_148174, '$COMMENT', [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT', [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0)\=@='$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _142588)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _304174))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _304174))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _304174))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _304174))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _304174)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _304174)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _309760))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _309760))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _309760)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _309760)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _309760)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0)\=@='$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _304174)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _136976))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _136976))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _136976))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _136976))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _136976)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _136976)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _332080))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _332080))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _332080)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _332080)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _332080)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0)\=@='$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _136976)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0)\=@='$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _360858, [], _360860)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _360858, [], _360860)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _360858, [], _360860)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _360858, [], _360860)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _360858, [], _360860)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), _370174, _370176)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT', [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0], _372060, [], _360860)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0], [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0], [], [])
   Call: (259) [system] var([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0], _372060, [], _360860)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0], [_375796|_375798], [], _360860)
^  Call: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _375796, [], _376736)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", [], [])
   Call: (260) [system] var(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _375796, [], _376736)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _375796, [], _376736)
   Call: (260) [system] atom(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _375796, [], _376736)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _375796, [], _376736)
   Call: (260) [system] compound(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", _375796, [], _376736)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", [], [])
^  Call: (259) [user] subst_vars([1355, 0], _375798, [], _360860)
^  Unify: (259) [user] subst_vars([1355, 0], [1355, 0], [], [])
   Call: (260) [system] var([1355, 0])
^  Redo: (259) [user] subst_vars([1355, 0], _375798, [], _360860)
^  Unify: (259) [user] subst_vars([1355, 0], [_391668|_391670], [], _360860)
^  Call: (260) [user] subst_vars(1355, _391668, [], _392608)
^  Unify: (260) [user] subst_vars(1355, 1355, [], [])
   Call: (261) [system] var(1355)
^  Redo: (260) [user] subst_vars(1355, _391668, [], _392608)
^  Unify: (260) [user] subst_vars(1355, _391668, [], _392608)
   Call: (261) [system] atom(1355)
^  Redo: (260) [user] subst_vars(1355, _391668, [], _392608)
^  Unify: (260) [user] subst_vars(1355, _391668, [], _392608)
   Call: (261) [system] compound(1355)
^  Redo: (260) [user] subst_vars(1355, _391668, [], _392608)
^  Unify: (260) [user] subst_vars(1355, 1355, [], [])
^  Exit: (260) [user] subst_vars(1355, 1355, [], [])
^  Call: (260) [user] subst_vars([0], _391670, [], _360860)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _391670, [], _360860)
^  Unify: (260) [user] subst_vars([0], [_407540|_407542], [], _360860)
^  Call: (261) [user] subst_vars(0, _407540, [], _408480)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _407540, [], _408480)
^  Unify: (261) [user] subst_vars(0, _407540, [], _408480)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _407540, [], _408480)
^  Unify: (261) [user] subst_vars(0, _407540, [], _408480)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _407540, [], _408480)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _407542, [], _360860)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _407542, [], _360860)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1355, 0], [1355, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0], [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0], [], [])
   Call: (258) [system] compound_name_arguments(_360858, '$COMMENT', [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT', [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), [], [])
   Call: (257) [system] _430898=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!(((a \"A\"))), expr!(a)]),", 1355, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1356, 0, 48630, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$stream_position'(48630, 1356, 0, 48664)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _483626))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _483626))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _483626)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _483626)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _483626)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _483626)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _489238))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _489238))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _489238))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _489238))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _489238)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _489238)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _494824))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _494824))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _494824)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _494824)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _494824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _494824)
   Call: (270) [system] var('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _494824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$VAR'(_502284))
   Call: (270) [system] atom('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _494824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _494824)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _494824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _494824)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _494824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _494824)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0)==[_511564, _511570]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _494824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _494824)
   Call: (270) [system] is_list('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _494824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _494824)
   Call: (270) [system] string('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _494824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _494824)
   Call: (270) [system] compound('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _521766, _521768)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT', [";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0], _7598)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0], _7598)
   Call: (271) [apply] apply:maplist_([";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0], _7598, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0], [_10416|_10418], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _10416)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _10416)
   Call: (273) [system] var(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _10416)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", '$VAR'(_15062))
   Call: (273) [system] atom(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _10416)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _10416)
   Call: (273) [system] ";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));"==true
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _10416)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _10416)
   Call: (273) [system] ";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));"==false
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _10416)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _10416)
   Call: (273) [system] ";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));"==[_24342, _24348]
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _10416)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _10416)
   Call: (273) [system] is_list(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _10416)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _10416)
   Call: (273) [system] string(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));")
   Exit: (273) [system] string(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _10416)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _10416)
   Call: (273) [system] compound(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _10416)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _10416)
^  Call: (273) [user] symbol(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));")
^  Unify: (273) [user] symbol(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));")
   Call: (274) [system] atom(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));")
   Fail: (274) [system] atom(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));")
^  Fail: (273) [user] symbol(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _10416)
   Call: (273) [system] ";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));"=_10416
   Exit: (273) [system] ";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));"=";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));"
^  Exit: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", ";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));")
   Call: (272) [apply] apply:maplist_([1356, 0], _10418, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1356, 0], [_48414|_48416], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1356, _48414)
^  Unify: (273) [user] mfix_vars1(1356, _48414)
   Call: (274) [system] var(1356)
^  Redo: (273) [user] mfix_vars1(1356, _48414)
^  Unify: (273) [user] mfix_vars1(1356, '$VAR'(_53060))
   Call: (274) [system] atom(1356)
^  Redo: (273) [user] mfix_vars1(1356, _48414)
^  Unify: (273) [user] mfix_vars1(1356, _48414)
   Call: (274) [system] 1356==true
^  Redo: (273) [user] mfix_vars1(1356, _48414)
^  Unify: (273) [user] mfix_vars1(1356, _48414)
   Call: (274) [system] 1356==false
^  Redo: (273) [user] mfix_vars1(1356, _48414)
^  Unify: (273) [user] mfix_vars1(1356, _48414)
   Call: (274) [system] 1356==[_62340, _62346]
^  Redo: (273) [user] mfix_vars1(1356, _48414)
^  Unify: (273) [user] mfix_vars1(1356, _48414)
   Call: (274) [system] is_list(1356)
^  Redo: (273) [user] mfix_vars1(1356, _48414)
^  Unify: (273) [user] mfix_vars1(1356, _48414)
   Call: (274) [system] string(1356)
^  Redo: (273) [user] mfix_vars1(1356, _48414)
^  Unify: (273) [user] mfix_vars1(1356, _48414)
   Call: (274) [system] compound(1356)
^  Redo: (273) [user] mfix_vars1(1356, _48414)
^  Unify: (273) [user] mfix_vars1(1356, _48414)
^  Call: (274) [user] symbol(1356)
^  Unify: (274) [user] symbol(1356)
   Call: (275) [system] atom(1356)
   Fail: (275) [system] atom(1356)
^  Fail: (274) [user] symbol(1356)
^  Redo: (273) [user] mfix_vars1(1356, _48414)
   Call: (274) [system] 1356=_48414
   Exit: (274) [system] 1356=1356
^  Exit: (273) [user] mfix_vars1(1356, 1356)
   Call: (273) [apply] apply:maplist_([0], _48416, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_82740|_82742], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _82740)
^  Unify: (274) [user] mfix_vars1(0, _82740)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _82740)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_87386))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _82740)
^  Unify: (274) [user] mfix_vars1(0, _82740)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _82740)
^  Unify: (274) [user] mfix_vars1(0, _82740)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _82740)
^  Unify: (274) [user] mfix_vars1(0, _82740)
   Call: (275) [system] 0==[_96666, _96672]
^  Redo: (274) [user] mfix_vars1(0, _82740)
^  Unify: (274) [user] mfix_vars1(0, _82740)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _82740)
^  Unify: (274) [user] mfix_vars1(0, _82740)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _82740)
^  Unify: (274) [user] mfix_vars1(0, _82740)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _82740)
^  Unify: (274) [user] mfix_vars1(0, _82740)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _82740)
   Call: (275) [system] 0=_82740
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _82742, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1356, 0], [1356, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0], [";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0], [";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0])
   Call: (270) [system] compound_name_arguments(_5988, '$COMMENT', [";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT', [";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0)\=@='$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _5974)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _132914))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _132914))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _132914))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _132914))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _132914)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _132914)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _138500))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _138500))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _138500)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _138500)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _138500)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0)\=@='$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _132914)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _5954))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _5954))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _5954))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _5954))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _5954)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _5954)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _160820))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _160820))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _160820)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _160820)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _160820)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0)\=@='$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _5954)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0)))
   Call: (261) [system] '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0)\=@='$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _189598, [], _189600)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _189598, [], _189600)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _189598, [], _189600)
   Call: (258) [system] atom('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _189598, [], _189600)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _189598, [], _189600)
   Call: (258) [system] compound('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), _198914, _198916)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT', [";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0])
^  Call: (258) [user] subst_vars([";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0], _200800, [], _189600)
^  Unify: (258) [user] subst_vars([";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0], [";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0], [], [])
   Call: (259) [system] var([";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0])
^  Redo: (258) [user] subst_vars([";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0], _200800, [], _189600)
^  Unify: (258) [user] subst_vars([";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0], [_204536|_204538], [], _189600)
^  Call: (259) [user] subst_vars(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _204536, [], _205476)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", ";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", [], [])
   Call: (260) [system] var(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _204536, [], _205476)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _204536, [], _205476)
   Call: (260) [system] atom(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _204536, [], _205476)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _204536, [], _205476)
   Call: (260) [system] compound(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", _204536, [], _205476)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", ";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", [], [])
^  Exit: (259) [user] subst_vars(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", ";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", [], [])
^  Call: (259) [user] subst_vars([1356, 0], _204538, [], _189600)
^  Unify: (259) [user] subst_vars([1356, 0], [1356, 0], [], [])
   Call: (260) [system] var([1356, 0])
^  Redo: (259) [user] subst_vars([1356, 0], _204538, [], _189600)
^  Unify: (259) [user] subst_vars([1356, 0], [_220408|_220410], [], _189600)
^  Call: (260) [user] subst_vars(1356, _220408, [], _221348)
^  Unify: (260) [user] subst_vars(1356, 1356, [], [])
   Call: (261) [system] var(1356)
^  Redo: (260) [user] subst_vars(1356, _220408, [], _221348)
^  Unify: (260) [user] subst_vars(1356, _220408, [], _221348)
   Call: (261) [system] atom(1356)
^  Redo: (260) [user] subst_vars(1356, _220408, [], _221348)
^  Unify: (260) [user] subst_vars(1356, _220408, [], _221348)
   Call: (261) [system] compound(1356)
^  Redo: (260) [user] subst_vars(1356, _220408, [], _221348)
^  Unify: (260) [user] subst_vars(1356, 1356, [], [])
^  Exit: (260) [user] subst_vars(1356, 1356, [], [])
^  Call: (260) [user] subst_vars([0], _220410, [], _189600)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _220410, [], _189600)
^  Unify: (260) [user] subst_vars([0], [_236280|_236282], [], _189600)
^  Call: (261) [user] subst_vars(0, _236280, [], _237220)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _236280, [], _237220)
^  Unify: (261) [user] subst_vars(0, _236280, [], _237220)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _236280, [], _237220)
^  Unify: (261) [user] subst_vars(0, _236280, [], _237220)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _236280, [], _237220)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _236282, [], _189600)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _236282, [], _189600)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1356, 0], [1356, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0], [";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0], [], [])
   Call: (258) [system] compound_name_arguments(_189598, '$COMMENT', [";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT', [";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), [], [])
   Call: (257) [system] _259638=metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" a)]));", 1356, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1357, 0, 48681, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$stream_position'(48681, 1357, 0, 48715)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _312376))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _312376))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _312376)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _312376)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _312376)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _312376)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _317988))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _317988))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _317988))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _317988))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _317988)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _317988)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _323574))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _323574))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _323574)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _323574)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _323574)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _323574)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _323574)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$VAR'(_331034))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _323574)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _323574)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _323574)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _323574)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _323574)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _323574)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0)==[_340314, _340320]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _323574)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _323574)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _323574)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _323574)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _323574)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _323574)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _350516, _350518)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT', [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0], _354258)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0], _354258)
   Call: (271) [apply] apply:maplist_([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0], _354258, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0], [_357076|_357078], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _357076)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _357076)
   Call: (273) [system] var(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _357076)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", '$VAR'(_361722))
   Call: (273) [system] atom(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _357076)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _357076)
   Call: (273) [system] ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _357076)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _357076)
   Call: (273) [system] ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _357076)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _357076)
   Call: (273) [system] ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),"==[_371002, _371008]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _357076)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _357076)
   Call: (273) [system] is_list(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _357076)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _357076)
   Call: (273) [system] string(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),")
   Exit: (273) [system] string(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _357076)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _357076)
   Call: (273) [system] compound(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _357076)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _357076)
^  Call: (273) [user] symbol(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),")
^  Unify: (273) [user] symbol(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),")
   Call: (274) [system] atom(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),")
   Fail: (274) [system] atom(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),")
^  Fail: (273) [user] symbol(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _357076)
   Call: (273) [system] ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),"=_357076
   Exit: (273) [system] ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),"=";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),")
   Call: (272) [apply] apply:maplist_([1357, 0], _357078, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1357, 0], [_395074|_395076], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1357, _395074)
^  Unify: (273) [user] mfix_vars1(1357, _395074)
   Call: (274) [system] var(1357)
^  Redo: (273) [user] mfix_vars1(1357, _395074)
^  Unify: (273) [user] mfix_vars1(1357, '$VAR'(_399720))
   Call: (274) [system] atom(1357)
^  Redo: (273) [user] mfix_vars1(1357, _395074)
^  Unify: (273) [user] mfix_vars1(1357, _395074)
   Call: (274) [system] 1357==true
^  Redo: (273) [user] mfix_vars1(1357, _395074)
^  Unify: (273) [user] mfix_vars1(1357, _395074)
   Call: (274) [system] 1357==false
^  Redo: (273) [user] mfix_vars1(1357, _395074)
^  Unify: (273) [user] mfix_vars1(1357, _395074)
   Call: (274) [system] 1357==[_409000, _409006]
^  Redo: (273) [user] mfix_vars1(1357, _395074)
^  Unify: (273) [user] mfix_vars1(1357, _395074)
   Call: (274) [system] is_list(1357)
^  Redo: (273) [user] mfix_vars1(1357, _395074)
^  Unify: (273) [user] mfix_vars1(1357, _395074)
   Call: (274) [system] string(1357)
^  Redo: (273) [user] mfix_vars1(1357, _395074)
^  Unify: (273) [user] mfix_vars1(1357, _395074)
   Call: (274) [system] compound(1357)
^  Redo: (273) [user] mfix_vars1(1357, _395074)
^  Unify: (273) [user] mfix_vars1(1357, _395074)
^  Call: (274) [user] symbol(1357)
^  Unify: (274) [user] symbol(1357)
   Call: (275) [system] atom(1357)
   Fail: (275) [system] atom(1357)
^  Fail: (274) [user] symbol(1357)
^  Redo: (273) [user] mfix_vars1(1357, _395074)
   Call: (274) [system] 1357=_395074
   Exit: (274) [system] 1357=1357
^  Exit: (273) [user] mfix_vars1(1357, 1357)
   Call: (273) [apply] apply:maplist_([0], _395076, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_429400|_429402], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _429400)
^  Unify: (274) [user] mfix_vars1(0, _429400)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _429400)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_434046))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _429400)
^  Unify: (274) [user] mfix_vars1(0, _429400)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _429400)
^  Unify: (274) [user] mfix_vars1(0, _429400)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _429400)
^  Unify: (274) [user] mfix_vars1(0, _429400)
   Call: (275) [system] 0==[_443326, _443332]
^  Redo: (274) [user] mfix_vars1(0, _429400)
^  Unify: (274) [user] mfix_vars1(0, _429400)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _429400)
^  Unify: (274) [user] mfix_vars1(0, _429400)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _429400)
^  Unify: (274) [user] mfix_vars1(0, _429400)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _429400)
^  Unify: (274) [user] mfix_vars1(0, _429400)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _429400)
   Call: (275) [system] 0=_429400
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _429402, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1357, 0], [1357, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0], [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0], [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0])
   Call: (270) [system] compound_name_arguments(_323574, '$COMMENT', [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT', [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0)\=@='$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _317988)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _479574))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _479574))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _479574))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _479574))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _479574)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _479574)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _485160))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _485160))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _485160)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _485160)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _485160)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0)\=@='$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _479574)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _312376))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _312376))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _312376))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _312376))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _312376)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _312376)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _507480))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _507480))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _507480)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _507480)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _507480)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0)\=@='$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _312376)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0)\=@='$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _18396, [], _18398)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _18396, [], _18398)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _18396, [], _18398)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _18396, [], _18398)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _18396, [], _18398)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), _27712, _27714)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT', [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0], _29598, [], _18398)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0], [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0], [], [])
   Call: (259) [system] var([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0], _29598, [], _18398)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0], [_33334|_33336], [], _18398)
^  Call: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _33334, [], _34274)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", [], [])
   Call: (260) [system] var(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _33334, [], _34274)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _33334, [], _34274)
   Call: (260) [system] atom(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _33334, [], _34274)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _33334, [], _34274)
   Call: (260) [system] compound(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", _33334, [], _34274)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", ";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", [], [])
^  Call: (259) [user] subst_vars([1357, 0], _33336, [], _18398)
^  Unify: (259) [user] subst_vars([1357, 0], [1357, 0], [], [])
   Call: (260) [system] var([1357, 0])
^  Redo: (259) [user] subst_vars([1357, 0], _33336, [], _18398)
^  Unify: (259) [user] subst_vars([1357, 0], [_49206|_49208], [], _18398)
^  Call: (260) [user] subst_vars(1357, _49206, [], _50146)
^  Unify: (260) [user] subst_vars(1357, 1357, [], [])
   Call: (261) [system] var(1357)
^  Redo: (260) [user] subst_vars(1357, _49206, [], _50146)
^  Unify: (260) [user] subst_vars(1357, _49206, [], _50146)
   Call: (261) [system] atom(1357)
^  Redo: (260) [user] subst_vars(1357, _49206, [], _50146)
^  Unify: (260) [user] subst_vars(1357, _49206, [], _50146)
   Call: (261) [system] compound(1357)
^  Redo: (260) [user] subst_vars(1357, _49206, [], _50146)
^  Unify: (260) [user] subst_vars(1357, 1357, [], [])
^  Exit: (260) [user] subst_vars(1357, 1357, [], [])
^  Call: (260) [user] subst_vars([0], _49208, [], _18398)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _49208, [], _18398)
^  Unify: (260) [user] subst_vars([0], [_65078|_65080], [], _18398)
^  Call: (261) [user] subst_vars(0, _65078, [], _66018)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _65078, [], _66018)
^  Unify: (261) [user] subst_vars(0, _65078, [], _66018)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _65078, [], _66018)
^  Unify: (261) [user] subst_vars(0, _65078, [], _66018)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _65078, [], _66018)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _65080, [], _18398)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _65080, [], _18398)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1357, 0], [1357, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0], [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0], [], [])
   Call: (258) [system] compound_name_arguments(_18396, '$COMMENT', [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT', [";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), [], [])
   Call: (257) [system] _88436=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(LetVarOp{}.execute(&mut vec![expr!((a \"A\") (b \"B\")), expr!(b a)]),", 1357, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1358, 0, 48769, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$stream_position'(48769, 1358, 0, 48803)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _141172))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _141172))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _141172)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _141172)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _141172)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _141172)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _146784))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _146784))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _146784))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _146784))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _146784)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _146784)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _152370))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _152370))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _152370)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _152370)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _152370)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _152370)
   Call: (270) [system] var('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _152370)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$VAR'(_159830))
   Call: (270) [system] atom('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _152370)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _152370)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _152370)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _152370)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _152370)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _152370)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0)==[_169110, _169116]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _152370)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _152370)
   Call: (270) [system] is_list('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _152370)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _152370)
   Call: (270) [system] string('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _152370)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _152370)
   Call: (270) [system] compound('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _179312, _179314)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT', [";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0], _183054)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0], _183054)
   Call: (271) [apply] apply:maplist_([";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0], _183054, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0], [_185872|_185874], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _185872)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _185872)
   Call: (273) [system] var(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _185872)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", '$VAR'(_190518))
   Call: (273) [system] atom(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _185872)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _185872)
   Call: (273) [system] ";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));"==true
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _185872)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _185872)
   Call: (273) [system] ";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));"==false
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _185872)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _185872)
   Call: (273) [system] ";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));"==[_199798, _199804]
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _185872)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _185872)
   Call: (273) [system] is_list(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _185872)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _185872)
   Call: (273) [system] string(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));")
   Exit: (273) [system] string(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _185872)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _185872)
   Call: (273) [system] compound(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _185872)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _185872)
^  Call: (273) [user] symbol(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));")
^  Unify: (273) [user] symbol(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));")
   Call: (274) [system] atom(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));")
   Fail: (274) [system] atom(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));")
^  Fail: (273) [user] symbol(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _185872)
   Call: (273) [system] ";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));"=_185872
   Exit: (273) [system] ";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));"=";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));"
^  Exit: (272) [user] mfix_vars1(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", ";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));")
   Call: (272) [apply] apply:maplist_([1358, 0], _185874, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1358, 0], [_223870|_223872], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1358, _223870)
^  Unify: (273) [user] mfix_vars1(1358, _223870)
   Call: (274) [system] var(1358)
^  Redo: (273) [user] mfix_vars1(1358, _223870)
^  Unify: (273) [user] mfix_vars1(1358, '$VAR'(_228516))
   Call: (274) [system] atom(1358)
^  Redo: (273) [user] mfix_vars1(1358, _223870)
^  Unify: (273) [user] mfix_vars1(1358, _223870)
   Call: (274) [system] 1358==true
^  Redo: (273) [user] mfix_vars1(1358, _223870)
^  Unify: (273) [user] mfix_vars1(1358, _223870)
   Call: (274) [system] 1358==false
^  Redo: (273) [user] mfix_vars1(1358, _223870)
^  Unify: (273) [user] mfix_vars1(1358, _223870)
   Call: (274) [system] 1358==[_237796, _237802]
^  Redo: (273) [user] mfix_vars1(1358, _223870)
^  Unify: (273) [user] mfix_vars1(1358, _223870)
   Call: (274) [system] is_list(1358)
^  Redo: (273) [user] mfix_vars1(1358, _223870)
^  Unify: (273) [user] mfix_vars1(1358, _223870)
   Call: (274) [system] string(1358)
^  Redo: (273) [user] mfix_vars1(1358, _223870)
^  Unify: (273) [user] mfix_vars1(1358, _223870)
   Call: (274) [system] compound(1358)
^  Redo: (273) [user] mfix_vars1(1358, _223870)
^  Unify: (273) [user] mfix_vars1(1358, _223870)
^  Call: (274) [user] symbol(1358)
^  Unify: (274) [user] symbol(1358)
   Call: (275) [system] atom(1358)
   Fail: (275) [system] atom(1358)
^  Fail: (274) [user] symbol(1358)
^  Redo: (273) [user] mfix_vars1(1358, _223870)
   Call: (274) [system] 1358=_223870
   Exit: (274) [system] 1358=1358
^  Exit: (273) [user] mfix_vars1(1358, 1358)
   Call: (273) [apply] apply:maplist_([0], _223872, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_258196|_258198], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _258196)
^  Unify: (274) [user] mfix_vars1(0, _258196)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _258196)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_262842))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _258196)
^  Unify: (274) [user] mfix_vars1(0, _258196)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _258196)
^  Unify: (274) [user] mfix_vars1(0, _258196)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _258196)
^  Unify: (274) [user] mfix_vars1(0, _258196)
   Call: (275) [system] 0==[_272122, _272128]
^  Redo: (274) [user] mfix_vars1(0, _258196)
^  Unify: (274) [user] mfix_vars1(0, _258196)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _258196)
^  Unify: (274) [user] mfix_vars1(0, _258196)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _258196)
^  Unify: (274) [user] mfix_vars1(0, _258196)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _258196)
^  Unify: (274) [user] mfix_vars1(0, _258196)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _258196)
   Call: (275) [system] 0=_258196
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _258198, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1358, 0], [1358, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0], [";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0], [";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0])
   Call: (270) [system] compound_name_arguments(_152370, '$COMMENT', [";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT', [";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0)\=@='$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _146784)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _308370))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _308370))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _308370))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _308370))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _308370)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _308370)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _313956))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _313956))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _313956)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _313956)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _313956)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0)\=@='$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _308370)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _141172))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _141172))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _141172))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _141172))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _141172)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _141172)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _336276))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _336276))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _336276)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _336276)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _336276)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0)\=@='$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _141172)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0)))
   Call: (261) [system] '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0)\=@='$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _365054, [], _365056)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _365054, [], _365056)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _365054, [], _365056)
   Call: (258) [system] atom('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _365054, [], _365056)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _365054, [], _365056)
   Call: (258) [system] compound('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), _374370, _374372)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT', [";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0])
^  Call: (258) [user] subst_vars([";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0], _376256, [], _365056)
^  Unify: (258) [user] subst_vars([";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0], [";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0], [], [])
   Call: (259) [system] var([";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0])
^  Redo: (258) [user] subst_vars([";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0], _376256, [], _365056)
^  Unify: (258) [user] subst_vars([";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0], [_379992|_379994], [], _365056)
^  Call: (259) [user] subst_vars(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _379992, [], _380932)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", ";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", [], [])
   Call: (260) [system] var(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _379992, [], _380932)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _379992, [], _380932)
   Call: (260) [system] atom(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _379992, [], _380932)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _379992, [], _380932)
   Call: (260) [system] compound(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", _379992, [], _380932)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", ";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", [], [])
^  Exit: (259) [user] subst_vars(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", ";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", [], [])
^  Call: (259) [user] subst_vars([1358, 0], _379994, [], _365056)
^  Unify: (259) [user] subst_vars([1358, 0], [1358, 0], [], [])
   Call: (260) [system] var([1358, 0])
^  Redo: (259) [user] subst_vars([1358, 0], _379994, [], _365056)
^  Unify: (259) [user] subst_vars([1358, 0], [_395864|_395866], [], _365056)
^  Call: (260) [user] subst_vars(1358, _395864, [], _396804)
^  Unify: (260) [user] subst_vars(1358, 1358, [], [])
   Call: (261) [system] var(1358)
^  Redo: (260) [user] subst_vars(1358, _395864, [], _396804)
^  Unify: (260) [user] subst_vars(1358, _395864, [], _396804)
   Call: (261) [system] atom(1358)
^  Redo: (260) [user] subst_vars(1358, _395864, [], _396804)
^  Unify: (260) [user] subst_vars(1358, _395864, [], _396804)
   Call: (261) [system] compound(1358)
^  Redo: (260) [user] subst_vars(1358, _395864, [], _396804)
^  Unify: (260) [user] subst_vars(1358, 1358, [], [])
^  Exit: (260) [user] subst_vars(1358, 1358, [], [])
^  Call: (260) [user] subst_vars([0], _395866, [], _365056)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _395866, [], _365056)
^  Unify: (260) [user] subst_vars([0], [_411736|_411738], [], _365056)
^  Call: (261) [user] subst_vars(0, _411736, [], _412676)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _411736, [], _412676)
^  Unify: (261) [user] subst_vars(0, _411736, [], _412676)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _411736, [], _412676)
^  Unify: (261) [user] subst_vars(0, _411736, [], _412676)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _411736, [], _412676)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _411738, [], _365056)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _411738, [], _365056)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1358, 0], [1358, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0], [";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0], [], [])
   Call: (258) [system] compound_name_arguments(_365054, '$COMMENT', [";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT', [";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), [], [])
   Call: (257) [system] _435094=metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![expr!({LetOp{}} a \"A\" ({LetVarOp{}} ((b \"B\")) (b a)))]));", 1358, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1359, 0, 48849, '$COMMENT'(";;    }", 1359, 0), '$stream_position'(48849, 1359, 0, 48883)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1359, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1359, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    }", 1359, 0), _487812))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1359, 0), _487812))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    }", 1359, 0), _487812)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1359, 0), _487812)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1359, 0), _487812)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1359, 0), _487812)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    }", 1359, 0), _493424))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1359, 0), _493424))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1359, 0), _493424))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1359, 0), _493424))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1359, 0), _493424)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1359, 0), _493424)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    }", 1359, 0), _499010))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1359, 0), _499010))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    }", 1359, 0), _499010)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1359, 0), _499010)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1359, 0), _499010)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1359, 0), _499010)
   Call: (270) [system] var('$COMMENT'(";;    }", 1359, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1359, 0), _499010)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1359, 0), '$VAR'(_506470))
   Call: (270) [system] atom('$COMMENT'(";;    }", 1359, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1359, 0), _499010)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1359, 0), _499010)
   Call: (270) [system] '$COMMENT'(";;    }", 1359, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1359, 0), _499010)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1359, 0), _499010)
   Call: (270) [system] '$COMMENT'(";;    }", 1359, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1359, 0), _499010)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1359, 0), _499010)
   Call: (270) [system] '$COMMENT'(";;    }", 1359, 0)==[_515750, _515756]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1359, 0), _499010)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1359, 0), _499010)
   Call: (270) [system] is_list('$COMMENT'(";;    }", 1359, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1359, 0), _499010)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1359, 0), _499010)
   Call: (270) [system] string('$COMMENT'(";;    }", 1359, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1359, 0), _499010)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1359, 0), _499010)
   Call: (270) [system] compound('$COMMENT'(";;    }", 1359, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    }", 1359, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1359, 0), _7810, _7812)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1359, 0), '$COMMENT', [";;    }", 1359, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    }", 1359, 0], _11552)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1359, 0], _11552)
   Call: (271) [apply] apply:maplist_([";;    }", 1359, 0], _11552, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    }", 1359, 0], [_14370|_14372], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    }", _14370)
^  Unify: (272) [user] mfix_vars1(";;    }", _14370)
   Call: (273) [system] var(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _14370)
^  Unify: (272) [user] mfix_vars1(";;    }", '$VAR'(_19016))
   Call: (273) [system] atom(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _14370)
^  Unify: (272) [user] mfix_vars1(";;    }", _14370)
   Call: (273) [system] ";;    }"==true
^  Redo: (272) [user] mfix_vars1(";;    }", _14370)
^  Unify: (272) [user] mfix_vars1(";;    }", _14370)
   Call: (273) [system] ";;    }"==false
^  Redo: (272) [user] mfix_vars1(";;    }", _14370)
^  Unify: (272) [user] mfix_vars1(";;    }", _14370)
   Call: (273) [system] ";;    }"==[_28296, _28302]
^  Redo: (272) [user] mfix_vars1(";;    }", _14370)
^  Unify: (272) [user] mfix_vars1(";;    }", _14370)
   Call: (273) [system] is_list(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _14370)
^  Unify: (272) [user] mfix_vars1(";;    }", _14370)
   Call: (273) [system] string(";;    }")
   Exit: (273) [system] string(";;    }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    }", _14370)
^  Unify: (272) [user] mfix_vars1(";;    }", _14370)
   Call: (273) [system] compound(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _14370)
^  Unify: (272) [user] mfix_vars1(";;    }", _14370)
^  Call: (273) [user] symbol(";;    }")
^  Unify: (273) [user] symbol(";;    }")
   Call: (274) [system] atom(";;    }")
   Fail: (274) [system] atom(";;    }")
^  Fail: (273) [user] symbol(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _14370)
   Call: (273) [system] ";;    }"=_14370
   Exit: (273) [system] ";;    }"=";;    }"
^  Exit: (272) [user] mfix_vars1(";;    }", ";;    }")
   Call: (272) [apply] apply:maplist_([1359, 0], _14372, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1359, 0], [_52368|_52370], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1359, _52368)
^  Unify: (273) [user] mfix_vars1(1359, _52368)
   Call: (274) [system] var(1359)
^  Redo: (273) [user] mfix_vars1(1359, _52368)
^  Unify: (273) [user] mfix_vars1(1359, '$VAR'(_57014))
   Call: (274) [system] atom(1359)
^  Redo: (273) [user] mfix_vars1(1359, _52368)
^  Unify: (273) [user] mfix_vars1(1359, _52368)
   Call: (274) [system] 1359==true
^  Redo: (273) [user] mfix_vars1(1359, _52368)
^  Unify: (273) [user] mfix_vars1(1359, _52368)
   Call: (274) [system] 1359==false
^  Redo: (273) [user] mfix_vars1(1359, _52368)
^  Unify: (273) [user] mfix_vars1(1359, _52368)
   Call: (274) [system] 1359==[_66294, _66300]
^  Redo: (273) [user] mfix_vars1(1359, _52368)
^  Unify: (273) [user] mfix_vars1(1359, _52368)
   Call: (274) [system] is_list(1359)
^  Redo: (273) [user] mfix_vars1(1359, _52368)
^  Unify: (273) [user] mfix_vars1(1359, _52368)
   Call: (274) [system] string(1359)
^  Redo: (273) [user] mfix_vars1(1359, _52368)
^  Unify: (273) [user] mfix_vars1(1359, _52368)
   Call: (274) [system] compound(1359)
^  Redo: (273) [user] mfix_vars1(1359, _52368)
^  Unify: (273) [user] mfix_vars1(1359, _52368)
^  Call: (274) [user] symbol(1359)
^  Unify: (274) [user] symbol(1359)
   Call: (275) [system] atom(1359)
   Fail: (275) [system] atom(1359)
^  Fail: (274) [user] symbol(1359)
^  Redo: (273) [user] mfix_vars1(1359, _52368)
   Call: (274) [system] 1359=_52368
   Exit: (274) [system] 1359=1359
^  Exit: (273) [user] mfix_vars1(1359, 1359)
   Call: (273) [apply] apply:maplist_([0], _52370, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_86694|_86696], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _86694)
^  Unify: (274) [user] mfix_vars1(0, _86694)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _86694)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_91340))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _86694)
^  Unify: (274) [user] mfix_vars1(0, _86694)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _86694)
^  Unify: (274) [user] mfix_vars1(0, _86694)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _86694)
^  Unify: (274) [user] mfix_vars1(0, _86694)
   Call: (275) [system] 0==[_100620, _100626]
^  Redo: (274) [user] mfix_vars1(0, _86694)
^  Unify: (274) [user] mfix_vars1(0, _86694)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _86694)
^  Unify: (274) [user] mfix_vars1(0, _86694)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _86694)
^  Unify: (274) [user] mfix_vars1(0, _86694)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _86694)
^  Unify: (274) [user] mfix_vars1(0, _86694)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _86694)
   Call: (275) [system] 0=_86694
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _86696, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1359, 0], [1359, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    }", 1359, 0], [";;    }", 1359, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1359, 0], [";;    }", 1359, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";;    }", 1359, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1359, 0), '$COMMENT', [";;    }", 1359, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1359, 0)\=@='$COMMENT'(";;    }", 1359, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1359, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    }", 1359, 0), _136868))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1359, 0), _136868))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1359, 0), _136868))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1359, 0), _136868))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1359, 0), _136868)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1359, 0), _136868)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    }", 1359, 0), _142454))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1359, 0), _142454))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    }", 1359, 0), _142454)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1359, 0), _142454)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    }", 1359, 0), _142454)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1359, 0)\=@='$COMMENT'(";;    }", 1359, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1359, 0), _136868)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    }", 1359, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1359, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1359, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1359, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1359, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1359, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    }", 1359, 0), _164774))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1359, 0), _164774))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    }", 1359, 0), _164774)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1359, 0), _164774)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    }", 1359, 0), _164774)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1359, 0)\=@='$COMMENT'(";;    }", 1359, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1359, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0)))
   Call: (261) [system] '$COMMENT'(";;    }", 1359, 0)\=@='$COMMENT'(";;    }", 1359, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1359, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1359, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1359, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1359, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1359, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    }", 1359, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    }", 1359, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    }", 1359, 0), _193552, [], _193554)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    }", 1359, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1359, 0), _193552, [], _193554)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1359, 0), _193552, [], _193554)
   Call: (258) [system] atom('$COMMENT'(";;    }", 1359, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1359, 0), _193552, [], _193554)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1359, 0), _193552, [], _193554)
   Call: (258) [system] compound('$COMMENT'(";;    }", 1359, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    }", 1359, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1359, 0), _202868, _202870)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1359, 0), '$COMMENT', [";;    }", 1359, 0])
^  Call: (258) [user] subst_vars([";;    }", 1359, 0], _204754, [], _193554)
^  Unify: (258) [user] subst_vars([";;    }", 1359, 0], [";;    }", 1359, 0], [], [])
   Call: (259) [system] var([";;    }", 1359, 0])
^  Redo: (258) [user] subst_vars([";;    }", 1359, 0], _204754, [], _193554)
^  Unify: (258) [user] subst_vars([";;    }", 1359, 0], [_208490|_208492], [], _193554)
^  Call: (259) [user] subst_vars(";;    }", _208490, [], _209430)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
   Call: (260) [system] var(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _208490, [], _209430)
^  Unify: (259) [user] subst_vars(";;    }", _208490, [], _209430)
   Call: (260) [system] atom(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _208490, [], _209430)
^  Unify: (259) [user] subst_vars(";;    }", _208490, [], _209430)
   Call: (260) [system] compound(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _208490, [], _209430)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Exit: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Call: (259) [user] subst_vars([1359, 0], _208492, [], _193554)
^  Unify: (259) [user] subst_vars([1359, 0], [1359, 0], [], [])
   Call: (260) [system] var([1359, 0])
^  Redo: (259) [user] subst_vars([1359, 0], _208492, [], _193554)
^  Unify: (259) [user] subst_vars([1359, 0], [_224362|_224364], [], _193554)
^  Call: (260) [user] subst_vars(1359, _224362, [], _225302)
^  Unify: (260) [user] subst_vars(1359, 1359, [], [])
   Call: (261) [system] var(1359)
^  Redo: (260) [user] subst_vars(1359, _224362, [], _225302)
^  Unify: (260) [user] subst_vars(1359, _224362, [], _225302)
   Call: (261) [system] atom(1359)
^  Redo: (260) [user] subst_vars(1359, _224362, [], _225302)
^  Unify: (260) [user] subst_vars(1359, _224362, [], _225302)
   Call: (261) [system] compound(1359)
^  Redo: (260) [user] subst_vars(1359, _224362, [], _225302)
^  Unify: (260) [user] subst_vars(1359, 1359, [], [])
^  Exit: (260) [user] subst_vars(1359, 1359, [], [])
^  Call: (260) [user] subst_vars([0], _224364, [], _193554)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _224364, [], _193554)
^  Unify: (260) [user] subst_vars([0], [_240234|_240236], [], _193554)
^  Call: (261) [user] subst_vars(0, _240234, [], _241174)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _240234, [], _241174)
^  Unify: (261) [user] subst_vars(0, _240234, [], _241174)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _240234, [], _241174)
^  Unify: (261) [user] subst_vars(0, _240234, [], _241174)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _240234, [], _241174)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _240236, [], _193554)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _240236, [], _193554)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1359, 0], [1359, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    }", 1359, 0], [";;    }", 1359, 0], [], [])
   Call: (258) [system] compound_name_arguments(_193552, '$COMMENT', [";;    }", 1359, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1359, 0), '$COMMENT', [";;    }", 1359, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    }", 1359, 0), '$COMMENT'(";;    }", 1359, 0), [], [])
   Call: (257) [system] _263592=metta_file_buffer(+, '$COMMENT'(";;    }", 1359, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    }", 1359, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    }", 1359, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1359, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1359, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1359, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1359, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1359, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1359, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1360, 0, 48857, '$COMMENT'(";; Converted:", 1360, 0), '$stream_position'(48857, 1360, 0, 48891)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1360, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1360, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1360, 0), _316310))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1360, 0), _316310))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1360, 0), _316310)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1360, 0), _316310)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1360, 0), _316310)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1360, 0), _316310)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1360, 0), _321922))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1360, 0), _321922))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1360, 0), _321922))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1360, 0), _321922))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1360, 0), _321922)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1360, 0), _321922)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1360, 0), _327508))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1360, 0), _327508))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1360, 0), _327508)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1360, 0), _327508)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1360, 0), _327508)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1360, 0), _327508)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1360, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1360, 0), _327508)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1360, 0), '$VAR'(_334968))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1360, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1360, 0), _327508)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1360, 0), _327508)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1360, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1360, 0), _327508)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1360, 0), _327508)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1360, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1360, 0), _327508)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1360, 0), _327508)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1360, 0)==[_344248, _344254]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1360, 0), _327508)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1360, 0), _327508)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1360, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1360, 0), _327508)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1360, 0), _327508)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1360, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1360, 0), _327508)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1360, 0), _327508)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1360, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1360, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1360, 0), _354450, _354452)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1360, 0), '$COMMENT', [";; Converted:", 1360, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1360, 0], _358192)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1360, 0], _358192)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1360, 0], _358192, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1360, 0], [_361010|_361012], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _361010)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _361010)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _361010)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_365656))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _361010)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _361010)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _361010)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _361010)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _361010)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _361010)
   Call: (273) [system] ";; Converted:"==[_374936, _374942]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _361010)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _361010)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _361010)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _361010)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _361010)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _361010)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _361010)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _361010)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _361010)
   Call: (273) [system] ";; Converted:"=_361010
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1360, 0], _361012, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1360, 0], [_399008|_399010], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1360, _399008)
^  Unify: (273) [user] mfix_vars1(1360, _399008)
   Call: (274) [system] var(1360)
^  Redo: (273) [user] mfix_vars1(1360, _399008)
^  Unify: (273) [user] mfix_vars1(1360, '$VAR'(_403654))
   Call: (274) [system] atom(1360)
^  Redo: (273) [user] mfix_vars1(1360, _399008)
^  Unify: (273) [user] mfix_vars1(1360, _399008)
   Call: (274) [system] 1360==true
^  Redo: (273) [user] mfix_vars1(1360, _399008)
^  Unify: (273) [user] mfix_vars1(1360, _399008)
   Call: (274) [system] 1360==false
^  Redo: (273) [user] mfix_vars1(1360, _399008)
^  Unify: (273) [user] mfix_vars1(1360, _399008)
   Call: (274) [system] 1360==[_412934, _412940]
^  Redo: (273) [user] mfix_vars1(1360, _399008)
^  Unify: (273) [user] mfix_vars1(1360, _399008)
   Call: (274) [system] is_list(1360)
^  Redo: (273) [user] mfix_vars1(1360, _399008)
^  Unify: (273) [user] mfix_vars1(1360, _399008)
   Call: (274) [system] string(1360)
^  Redo: (273) [user] mfix_vars1(1360, _399008)
^  Unify: (273) [user] mfix_vars1(1360, _399008)
   Call: (274) [system] compound(1360)
^  Redo: (273) [user] mfix_vars1(1360, _399008)
^  Unify: (273) [user] mfix_vars1(1360, _399008)
^  Call: (274) [user] symbol(1360)
^  Unify: (274) [user] symbol(1360)
   Call: (275) [system] atom(1360)
   Fail: (275) [system] atom(1360)
^  Fail: (274) [user] symbol(1360)
^  Redo: (273) [user] mfix_vars1(1360, _399008)
   Call: (274) [system] 1360=_399008
   Exit: (274) [system] 1360=1360
^  Exit: (273) [user] mfix_vars1(1360, 1360)
   Call: (273) [apply] apply:maplist_([0], _399010, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_433334|_433336], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _433334)
^  Unify: (274) [user] mfix_vars1(0, _433334)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _433334)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_437980))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _433334)
^  Unify: (274) [user] mfix_vars1(0, _433334)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _433334)
^  Unify: (274) [user] mfix_vars1(0, _433334)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _433334)
^  Unify: (274) [user] mfix_vars1(0, _433334)
   Call: (275) [system] 0==[_447260, _447266]
^  Redo: (274) [user] mfix_vars1(0, _433334)
^  Unify: (274) [user] mfix_vars1(0, _433334)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _433334)
^  Unify: (274) [user] mfix_vars1(0, _433334)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _433334)
^  Unify: (274) [user] mfix_vars1(0, _433334)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _433334)
^  Unify: (274) [user] mfix_vars1(0, _433334)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _433334)
   Call: (275) [system] 0=_433334
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _433336, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1360, 0], [1360, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1360, 0], [";; Converted:", 1360, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1360, 0], [";; Converted:", 1360, 0])
   Call: (270) [system] compound_name_arguments(_327508, '$COMMENT', [";; Converted:", 1360, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1360, 0), '$COMMENT', [";; Converted:", 1360, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1360, 0)\=@='$COMMENT'(";; Converted:", 1360, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1360, 0), _321922)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1360, 0), _483508))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1360, 0), _483508))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1360, 0), _483508))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1360, 0), _483508))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1360, 0), _483508)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1360, 0), _483508)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1360, 0), _489094))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1360, 0), _489094))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1360, 0), _489094)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1360, 0), _489094)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1360, 0), _489094)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1360, 0)\=@='$COMMENT'(";; Converted:", 1360, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1360, 0), _483508)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1360, 0), _316310))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1360, 0), _316310))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1360, 0), _316310))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1360, 0), _316310))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1360, 0), _316310)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1360, 0), _316310)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1360, 0), _511414))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1360, 0), _511414))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1360, 0), _511414)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1360, 0), _511414)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1360, 0), _511414)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1360, 0)\=@='$COMMENT'(";; Converted:", 1360, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1360, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1360, 0)\=@='$COMMENT'(";; Converted:", 1360, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1360, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1360, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1360, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1360, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1360, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1360, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1360, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1360, 0), _22274, [], _22276)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1360, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1360, 0), _22274, [], _22276)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1360, 0), _22274, [], _22276)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1360, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1360, 0), _22274, [], _22276)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1360, 0), _22274, [], _22276)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1360, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1360, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1360, 0), _31590, _31592)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1360, 0), '$COMMENT', [";; Converted:", 1360, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1360, 0], _33476, [], _22276)
^  Unify: (258) [user] subst_vars([";; Converted:", 1360, 0], [";; Converted:", 1360, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1360, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1360, 0], _33476, [], _22276)
^  Unify: (258) [user] subst_vars([";; Converted:", 1360, 0], [_37212|_37214], [], _22276)
^  Call: (259) [user] subst_vars(";; Converted:", _37212, [], _38152)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _37212, [], _38152)
^  Unify: (259) [user] subst_vars(";; Converted:", _37212, [], _38152)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _37212, [], _38152)
^  Unify: (259) [user] subst_vars(";; Converted:", _37212, [], _38152)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _37212, [], _38152)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1360, 0], _37214, [], _22276)
^  Unify: (259) [user] subst_vars([1360, 0], [1360, 0], [], [])
   Call: (260) [system] var([1360, 0])
^  Redo: (259) [user] subst_vars([1360, 0], _37214, [], _22276)
^  Unify: (259) [user] subst_vars([1360, 0], [_53084|_53086], [], _22276)
^  Call: (260) [user] subst_vars(1360, _53084, [], _54024)
^  Unify: (260) [user] subst_vars(1360, 1360, [], [])
   Call: (261) [system] var(1360)
^  Redo: (260) [user] subst_vars(1360, _53084, [], _54024)
^  Unify: (260) [user] subst_vars(1360, _53084, [], _54024)
   Call: (261) [system] atom(1360)
^  Redo: (260) [user] subst_vars(1360, _53084, [], _54024)
^  Unify: (260) [user] subst_vars(1360, _53084, [], _54024)
   Call: (261) [system] compound(1360)
^  Redo: (260) [user] subst_vars(1360, _53084, [], _54024)
^  Unify: (260) [user] subst_vars(1360, 1360, [], [])
^  Exit: (260) [user] subst_vars(1360, 1360, [], [])
^  Call: (260) [user] subst_vars([0], _53086, [], _22276)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _53086, [], _22276)
^  Unify: (260) [user] subst_vars([0], [_68956|_68958], [], _22276)
^  Call: (261) [user] subst_vars(0, _68956, [], _69896)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _68956, [], _69896)
^  Unify: (261) [user] subst_vars(0, _68956, [], _69896)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _68956, [], _69896)
^  Unify: (261) [user] subst_vars(0, _68956, [], _69896)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _68956, [], _69896)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _68958, [], _22276)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _68958, [], _22276)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1360, 0], [1360, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1360, 0], [";; Converted:", 1360, 0], [], [])
   Call: (258) [system] compound_name_arguments(_22274, '$COMMENT', [";; Converted:", 1360, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1360, 0), '$COMMENT', [";; Converted:", 1360, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1360, 0), '$COMMENT'(";; Converted:", 1360, 0), [], [])
   Call: (257) [system] _92314=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1360, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1360, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1360, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1360, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1360, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1360, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1360, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1360, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1360, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1365, 0, 49030, '$COMMENT'(";; Original:", 1365, 0), '$stream_position'(49030, 1365, 0, 49064)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1365, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1365, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1365, 0), _145032))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1365, 0), _145032))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1365, 0), _145032)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1365, 0), _145032)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1365, 0), _145032)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1365, 0), _145032)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1365, 0), _150644))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1365, 0), _150644))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1365, 0), _150644))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1365, 0), _150644))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1365, 0), _150644)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1365, 0), _150644)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1365, 0), _156230))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1365, 0), _156230))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1365, 0), _156230)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1365, 0), _156230)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1365, 0), _156230)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1365, 0), _156230)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1365, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1365, 0), _156230)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1365, 0), '$VAR'(_163690))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1365, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1365, 0), _156230)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1365, 0), _156230)
   Call: (270) [system] '$COMMENT'(";; Original:", 1365, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1365, 0), _156230)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1365, 0), _156230)
   Call: (270) [system] '$COMMENT'(";; Original:", 1365, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1365, 0), _156230)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1365, 0), _156230)
   Call: (270) [system] '$COMMENT'(";; Original:", 1365, 0)==[_172970, _172976]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1365, 0), _156230)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1365, 0), _156230)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1365, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1365, 0), _156230)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1365, 0), _156230)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1365, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1365, 0), _156230)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1365, 0), _156230)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1365, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1365, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1365, 0), _183172, _183174)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1365, 0), '$COMMENT', [";; Original:", 1365, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1365, 0], _186914)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1365, 0], _186914)
   Call: (271) [apply] apply:maplist_([";; Original:", 1365, 0], _186914, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1365, 0], [_189732|_189734], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _189732)
^  Unify: (272) [user] mfix_vars1(";; Original:", _189732)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _189732)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_194378))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _189732)
^  Unify: (272) [user] mfix_vars1(";; Original:", _189732)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _189732)
^  Unify: (272) [user] mfix_vars1(";; Original:", _189732)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _189732)
^  Unify: (272) [user] mfix_vars1(";; Original:", _189732)
   Call: (273) [system] ";; Original:"==[_203658, _203664]
^  Redo: (272) [user] mfix_vars1(";; Original:", _189732)
^  Unify: (272) [user] mfix_vars1(";; Original:", _189732)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _189732)
^  Unify: (272) [user] mfix_vars1(";; Original:", _189732)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _189732)
^  Unify: (272) [user] mfix_vars1(";; Original:", _189732)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _189732)
^  Unify: (272) [user] mfix_vars1(";; Original:", _189732)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _189732)
   Call: (273) [system] ";; Original:"=_189732
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1365, 0], _189734, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1365, 0], [_227730|_227732], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1365, _227730)
^  Unify: (273) [user] mfix_vars1(1365, _227730)
   Call: (274) [system] var(1365)
^  Redo: (273) [user] mfix_vars1(1365, _227730)
^  Unify: (273) [user] mfix_vars1(1365, '$VAR'(_232376))
   Call: (274) [system] atom(1365)
^  Redo: (273) [user] mfix_vars1(1365, _227730)
^  Unify: (273) [user] mfix_vars1(1365, _227730)
   Call: (274) [system] 1365==true
^  Redo: (273) [user] mfix_vars1(1365, _227730)
^  Unify: (273) [user] mfix_vars1(1365, _227730)
   Call: (274) [system] 1365==false
^  Redo: (273) [user] mfix_vars1(1365, _227730)
^  Unify: (273) [user] mfix_vars1(1365, _227730)
   Call: (274) [system] 1365==[_241656, _241662]
^  Redo: (273) [user] mfix_vars1(1365, _227730)
^  Unify: (273) [user] mfix_vars1(1365, _227730)
   Call: (274) [system] is_list(1365)
^  Redo: (273) [user] mfix_vars1(1365, _227730)
^  Unify: (273) [user] mfix_vars1(1365, _227730)
   Call: (274) [system] string(1365)
^  Redo: (273) [user] mfix_vars1(1365, _227730)
^  Unify: (273) [user] mfix_vars1(1365, _227730)
   Call: (274) [system] compound(1365)
^  Redo: (273) [user] mfix_vars1(1365, _227730)
^  Unify: (273) [user] mfix_vars1(1365, _227730)
^  Call: (274) [user] symbol(1365)
^  Unify: (274) [user] symbol(1365)
   Call: (275) [system] atom(1365)
   Fail: (275) [system] atom(1365)
^  Fail: (274) [user] symbol(1365)
^  Redo: (273) [user] mfix_vars1(1365, _227730)
   Call: (274) [system] 1365=_227730
   Exit: (274) [system] 1365=1365
^  Exit: (273) [user] mfix_vars1(1365, 1365)
   Call: (273) [apply] apply:maplist_([0], _227732, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_262056|_262058], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _262056)
^  Unify: (274) [user] mfix_vars1(0, _262056)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _262056)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_266702))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _262056)
^  Unify: (274) [user] mfix_vars1(0, _262056)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _262056)
^  Unify: (274) [user] mfix_vars1(0, _262056)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _262056)
^  Unify: (274) [user] mfix_vars1(0, _262056)
   Call: (275) [system] 0==[_275982, _275988]
^  Redo: (274) [user] mfix_vars1(0, _262056)
^  Unify: (274) [user] mfix_vars1(0, _262056)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _262056)
^  Unify: (274) [user] mfix_vars1(0, _262056)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _262056)
^  Unify: (274) [user] mfix_vars1(0, _262056)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _262056)
^  Unify: (274) [user] mfix_vars1(0, _262056)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _262056)
   Call: (275) [system] 0=_262056
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _262058, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1365, 0], [1365, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1365, 0], [";; Original:", 1365, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1365, 0], [";; Original:", 1365, 0])
   Call: (270) [system] compound_name_arguments(_156230, '$COMMENT', [";; Original:", 1365, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1365, 0), '$COMMENT', [";; Original:", 1365, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1365, 0)\=@='$COMMENT'(";; Original:", 1365, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1365, 0), _150644)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1365, 0), _312230))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1365, 0), _312230))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1365, 0), _312230))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1365, 0), _312230))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1365, 0), _312230)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1365, 0), _312230)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1365, 0), _317816))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1365, 0), _317816))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1365, 0), _317816)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1365, 0), _317816)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1365, 0), _317816)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1365, 0)\=@='$COMMENT'(";; Original:", 1365, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1365, 0), _312230)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1365, 0), _145032))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1365, 0), _145032))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1365, 0), _145032))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1365, 0), _145032))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1365, 0), _145032)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1365, 0), _145032)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1365, 0), _340136))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1365, 0), _340136))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1365, 0), _340136)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1365, 0), _340136)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1365, 0), _340136)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1365, 0)\=@='$COMMENT'(";; Original:", 1365, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1365, 0), _145032)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1365, 0)\=@='$COMMENT'(";; Original:", 1365, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1365, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1365, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1365, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1365, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1365, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1365, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1365, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1365, 0), _368914, [], _368916)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1365, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1365, 0), _368914, [], _368916)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1365, 0), _368914, [], _368916)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1365, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1365, 0), _368914, [], _368916)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1365, 0), _368914, [], _368916)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1365, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1365, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1365, 0), _378230, _378232)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1365, 0), '$COMMENT', [";; Original:", 1365, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1365, 0], _380116, [], _368916)
^  Unify: (258) [user] subst_vars([";; Original:", 1365, 0], [";; Original:", 1365, 0], [], [])
   Call: (259) [system] var([";; Original:", 1365, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1365, 0], _380116, [], _368916)
^  Unify: (258) [user] subst_vars([";; Original:", 1365, 0], [_383852|_383854], [], _368916)
^  Call: (259) [user] subst_vars(";; Original:", _383852, [], _384792)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _383852, [], _384792)
^  Unify: (259) [user] subst_vars(";; Original:", _383852, [], _384792)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _383852, [], _384792)
^  Unify: (259) [user] subst_vars(";; Original:", _383852, [], _384792)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _383852, [], _384792)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1365, 0], _383854, [], _368916)
^  Unify: (259) [user] subst_vars([1365, 0], [1365, 0], [], [])
   Call: (260) [system] var([1365, 0])
^  Redo: (259) [user] subst_vars([1365, 0], _383854, [], _368916)
^  Unify: (259) [user] subst_vars([1365, 0], [_399724|_399726], [], _368916)
^  Call: (260) [user] subst_vars(1365, _399724, [], _400664)
^  Unify: (260) [user] subst_vars(1365, 1365, [], [])
   Call: (261) [system] var(1365)
^  Redo: (260) [user] subst_vars(1365, _399724, [], _400664)
^  Unify: (260) [user] subst_vars(1365, _399724, [], _400664)
   Call: (261) [system] atom(1365)
^  Redo: (260) [user] subst_vars(1365, _399724, [], _400664)
^  Unify: (260) [user] subst_vars(1365, _399724, [], _400664)
   Call: (261) [system] compound(1365)
^  Redo: (260) [user] subst_vars(1365, _399724, [], _400664)
^  Unify: (260) [user] subst_vars(1365, 1365, [], [])
^  Exit: (260) [user] subst_vars(1365, 1365, [], [])
^  Call: (260) [user] subst_vars([0], _399726, [], _368916)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _399726, [], _368916)
^  Unify: (260) [user] subst_vars([0], [_415596|_415598], [], _368916)
^  Call: (261) [user] subst_vars(0, _415596, [], _416536)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _415596, [], _416536)
^  Unify: (261) [user] subst_vars(0, _415596, [], _416536)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _415596, [], _416536)
^  Unify: (261) [user] subst_vars(0, _415596, [], _416536)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _415596, [], _416536)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _415598, [], _368916)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _415598, [], _368916)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1365, 0], [1365, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1365, 0], [";; Original:", 1365, 0], [], [])
   Call: (258) [system] compound_name_arguments(_368914, '$COMMENT', [";; Original:", 1365, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1365, 0), '$COMMENT', [";; Original:", 1365, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1365, 0), '$COMMENT'(";; Original:", 1365, 0), [], [])
   Call: (257) [system] _438954=metta_file_buffer(+, '$COMMENT'(";; Original:", 1365, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1365, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1365, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1365, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1365, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1365, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1365, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1365, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1365, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1366, 0, 49043, '$COMMENT'(";;    #[test]", 1366, 0), '$stream_position'(49043, 1366, 0, 49077)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1366, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1366, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1366, 0), _491672))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1366, 0), _491672))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1366, 0), _491672)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1366, 0), _491672)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1366, 0), _491672)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1366, 0), _491672)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1366, 0), _497284))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1366, 0), _497284))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1366, 0), _497284))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1366, 0), _497284))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1366, 0), _497284)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1366, 0), _497284)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    #[test]", 1366, 0), _502870))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1366, 0), _502870))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    #[test]", 1366, 0), _502870)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1366, 0), _502870)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1366, 0), _502870)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1366, 0), _502870)
   Call: (270) [system] var('$COMMENT'(";;    #[test]", 1366, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1366, 0), _502870)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1366, 0), '$VAR'(_510330))
   Call: (270) [system] atom('$COMMENT'(";;    #[test]", 1366, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1366, 0), _502870)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1366, 0), _502870)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1366, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1366, 0), _502870)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1366, 0), _502870)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1366, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1366, 0), _502870)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1366, 0), _502870)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1366, 0)==[_519610, _519616]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1366, 0), _502870)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1366, 0), _502870)
   Call: (270) [system] is_list('$COMMENT'(";;    #[test]", 1366, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1366, 0), _5978)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1366, 0), _5978)
   Call: (270) [system] string('$COMMENT'(";;    #[test]", 1366, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1366, 0), _5978)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1366, 0), _5978)
   Call: (270) [system] compound('$COMMENT'(";;    #[test]", 1366, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    #[test]", 1366, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1366, 0), _11900, _11902)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT', [";;    #[test]", 1366, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    #[test]", 1366, 0], _15642)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1366, 0], _15642)
   Call: (271) [apply] apply:maplist_([";;    #[test]", 1366, 0], _15642, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    #[test]", 1366, 0], [_18460|_18462], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    #[test]", _18460)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _18460)
   Call: (273) [system] var(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _18460)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", '$VAR'(_23106))
   Call: (273) [system] atom(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _18460)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _18460)
   Call: (273) [system] ";;    #[test]"==true
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _18460)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _18460)
   Call: (273) [system] ";;    #[test]"==false
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _18460)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _18460)
   Call: (273) [system] ";;    #[test]"==[_32386, _32392]
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _18460)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _18460)
   Call: (273) [system] is_list(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _18460)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _18460)
   Call: (273) [system] string(";;    #[test]")
   Exit: (273) [system] string(";;    #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _18460)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _18460)
   Call: (273) [system] compound(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _18460)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _18460)
^  Call: (273) [user] symbol(";;    #[test]")
^  Unify: (273) [user] symbol(";;    #[test]")
   Call: (274) [system] atom(";;    #[test]")
   Fail: (274) [system] atom(";;    #[test]")
^  Fail: (273) [user] symbol(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _18460)
   Call: (273) [system] ";;    #[test]"=_18460
   Exit: (273) [system] ";;    #[test]"=";;    #[test]"
^  Exit: (272) [user] mfix_vars1(";;    #[test]", ";;    #[test]")
   Call: (272) [apply] apply:maplist_([1366, 0], _18462, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1366, 0], [_56458|_56460], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1366, _56458)
^  Unify: (273) [user] mfix_vars1(1366, _56458)
   Call: (274) [system] var(1366)
^  Redo: (273) [user] mfix_vars1(1366, _56458)
^  Unify: (273) [user] mfix_vars1(1366, '$VAR'(_61104))
   Call: (274) [system] atom(1366)
^  Redo: (273) [user] mfix_vars1(1366, _56458)
^  Unify: (273) [user] mfix_vars1(1366, _56458)
   Call: (274) [system] 1366==true
^  Redo: (273) [user] mfix_vars1(1366, _56458)
^  Unify: (273) [user] mfix_vars1(1366, _56458)
   Call: (274) [system] 1366==false
^  Redo: (273) [user] mfix_vars1(1366, _56458)
^  Unify: (273) [user] mfix_vars1(1366, _56458)
   Call: (274) [system] 1366==[_70384, _70390]
^  Redo: (273) [user] mfix_vars1(1366, _56458)
^  Unify: (273) [user] mfix_vars1(1366, _56458)
   Call: (274) [system] is_list(1366)
^  Redo: (273) [user] mfix_vars1(1366, _56458)
^  Unify: (273) [user] mfix_vars1(1366, _56458)
   Call: (274) [system] string(1366)
^  Redo: (273) [user] mfix_vars1(1366, _56458)
^  Unify: (273) [user] mfix_vars1(1366, _56458)
   Call: (274) [system] compound(1366)
^  Redo: (273) [user] mfix_vars1(1366, _56458)
^  Unify: (273) [user] mfix_vars1(1366, _56458)
^  Call: (274) [user] symbol(1366)
^  Unify: (274) [user] symbol(1366)
   Call: (275) [system] atom(1366)
   Fail: (275) [system] atom(1366)
^  Fail: (274) [user] symbol(1366)
^  Redo: (273) [user] mfix_vars1(1366, _56458)
   Call: (274) [system] 1366=_56458
   Exit: (274) [system] 1366=1366
^  Exit: (273) [user] mfix_vars1(1366, 1366)
   Call: (273) [apply] apply:maplist_([0], _56460, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_90784|_90786], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _90784)
^  Unify: (274) [user] mfix_vars1(0, _90784)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _90784)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_95430))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _90784)
^  Unify: (274) [user] mfix_vars1(0, _90784)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _90784)
^  Unify: (274) [user] mfix_vars1(0, _90784)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _90784)
^  Unify: (274) [user] mfix_vars1(0, _90784)
   Call: (275) [system] 0==[_104710, _104716]
^  Redo: (274) [user] mfix_vars1(0, _90784)
^  Unify: (274) [user] mfix_vars1(0, _90784)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _90784)
^  Unify: (274) [user] mfix_vars1(0, _90784)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _90784)
^  Unify: (274) [user] mfix_vars1(0, _90784)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _90784)
^  Unify: (274) [user] mfix_vars1(0, _90784)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _90784)
   Call: (275) [system] 0=_90784
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _90786, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1366, 0], [1366, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    #[test]", 1366, 0], [";;    #[test]", 1366, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1366, 0], [";;    #[test]", 1366, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";;    #[test]", 1366, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT', [";;    #[test]", 1366, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1366, 0)\=@='$COMMENT'(";;    #[test]", 1366, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1366, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    #[test]", 1366, 0), _140958))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1366, 0), _140958))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1366, 0), _140958))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1366, 0), _140958))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1366, 0), _140958)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1366, 0), _140958)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    #[test]", 1366, 0), _146544))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1366, 0), _146544))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    #[test]", 1366, 0), _146544)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1366, 0), _146544)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1366, 0), _146544)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1366, 0)\=@='$COMMENT'(";;    #[test]", 1366, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1366, 0), _140958)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    #[test]", 1366, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1366, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1366, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1366, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1366, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1366, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    #[test]", 1366, 0), _168864))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1366, 0), _168864))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    #[test]", 1366, 0), _168864)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1366, 0), _168864)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1366, 0), _168864)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1366, 0)\=@='$COMMENT'(";;    #[test]", 1366, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1366, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0)))
   Call: (261) [system] '$COMMENT'(";;    #[test]", 1366, 0)\=@='$COMMENT'(";;    #[test]", 1366, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1366, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1366, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1366, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1366, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1366, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1366, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1366, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1366, 0), _197642, [], _197644)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    #[test]", 1366, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1366, 0), _197642, [], _197644)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1366, 0), _197642, [], _197644)
   Call: (258) [system] atom('$COMMENT'(";;    #[test]", 1366, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1366, 0), _197642, [], _197644)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1366, 0), _197642, [], _197644)
   Call: (258) [system] compound('$COMMENT'(";;    #[test]", 1366, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    #[test]", 1366, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1366, 0), _206958, _206960)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT', [";;    #[test]", 1366, 0])
^  Call: (258) [user] subst_vars([";;    #[test]", 1366, 0], _208844, [], _197644)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1366, 0], [";;    #[test]", 1366, 0], [], [])
   Call: (259) [system] var([";;    #[test]", 1366, 0])
^  Redo: (258) [user] subst_vars([";;    #[test]", 1366, 0], _208844, [], _197644)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1366, 0], [_212580|_212582], [], _197644)
^  Call: (259) [user] subst_vars(";;    #[test]", _212580, [], _213520)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
   Call: (260) [system] var(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _212580, [], _213520)
^  Unify: (259) [user] subst_vars(";;    #[test]", _212580, [], _213520)
   Call: (260) [system] atom(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _212580, [], _213520)
^  Unify: (259) [user] subst_vars(";;    #[test]", _212580, [], _213520)
   Call: (260) [system] compound(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _212580, [], _213520)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Exit: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Call: (259) [user] subst_vars([1366, 0], _212582, [], _197644)
^  Unify: (259) [user] subst_vars([1366, 0], [1366, 0], [], [])
   Call: (260) [system] var([1366, 0])
^  Redo: (259) [user] subst_vars([1366, 0], _212582, [], _197644)
^  Unify: (259) [user] subst_vars([1366, 0], [_228452|_228454], [], _197644)
^  Call: (260) [user] subst_vars(1366, _228452, [], _229392)
^  Unify: (260) [user] subst_vars(1366, 1366, [], [])
   Call: (261) [system] var(1366)
^  Redo: (260) [user] subst_vars(1366, _228452, [], _229392)
^  Unify: (260) [user] subst_vars(1366, _228452, [], _229392)
   Call: (261) [system] atom(1366)
^  Redo: (260) [user] subst_vars(1366, _228452, [], _229392)
^  Unify: (260) [user] subst_vars(1366, _228452, [], _229392)
   Call: (261) [system] compound(1366)
^  Redo: (260) [user] subst_vars(1366, _228452, [], _229392)
^  Unify: (260) [user] subst_vars(1366, 1366, [], [])
^  Exit: (260) [user] subst_vars(1366, 1366, [], [])
^  Call: (260) [user] subst_vars([0], _228454, [], _197644)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _228454, [], _197644)
^  Unify: (260) [user] subst_vars([0], [_244324|_244326], [], _197644)
^  Call: (261) [user] subst_vars(0, _244324, [], _245264)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _244324, [], _245264)
^  Unify: (261) [user] subst_vars(0, _244324, [], _245264)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _244324, [], _245264)
^  Unify: (261) [user] subst_vars(0, _244324, [], _245264)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _244324, [], _245264)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _244326, [], _197644)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _244326, [], _197644)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1366, 0], [1366, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    #[test]", 1366, 0], [";;    #[test]", 1366, 0], [], [])
   Call: (258) [system] compound_name_arguments(_197642, '$COMMENT', [";;    #[test]", 1366, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT', [";;    #[test]", 1366, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1366, 0), '$COMMENT'(";;    #[test]", 1366, 0), [], [])
   Call: (257) [system] _267682=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1366, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1366, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1366, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1366, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1366, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1366, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1366, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1366, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1366, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1367, 0, 49057, '$COMMENT'(";;    fn state_ops() {", 1367, 0), '$stream_position'(49057, 1367, 0, 49091)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _320402))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _320402))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _320402)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _320402)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    fn state_ops() {", 1367, 0), _320402)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    fn state_ops() {", 1367, 0), _320402)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _326014))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _326014))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _326014))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _326014))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _326014)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _326014)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _331600))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _331600))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _331600)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _331600)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    fn state_ops() {", 1367, 0), _331600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn state_ops() {", 1367, 0), _331600)
   Call: (270) [system] var('$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn state_ops() {", 1367, 0), _331600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn state_ops() {", 1367, 0), '$VAR'(_339060))
   Call: (270) [system] atom('$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn state_ops() {", 1367, 0), _331600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn state_ops() {", 1367, 0), _331600)
   Call: (270) [system] '$COMMENT'(";;    fn state_ops() {", 1367, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn state_ops() {", 1367, 0), _331600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn state_ops() {", 1367, 0), _331600)
   Call: (270) [system] '$COMMENT'(";;    fn state_ops() {", 1367, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn state_ops() {", 1367, 0), _331600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn state_ops() {", 1367, 0), _331600)
   Call: (270) [system] '$COMMENT'(";;    fn state_ops() {", 1367, 0)==[_348340, _348346]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn state_ops() {", 1367, 0), _331600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn state_ops() {", 1367, 0), _331600)
   Call: (270) [system] is_list('$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn state_ops() {", 1367, 0), _331600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn state_ops() {", 1367, 0), _331600)
   Call: (270) [system] string('$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn state_ops() {", 1367, 0), _331600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn state_ops() {", 1367, 0), _331600)
   Call: (270) [system] compound('$COMMENT'(";;    fn state_ops() {", 1367, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    fn state_ops() {", 1367, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    fn state_ops() {", 1367, 0), _358542, _358544)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT', [";;    fn state_ops() {", 1367, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    fn state_ops() {", 1367, 0], _362284)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn state_ops() {", 1367, 0], _362284)
   Call: (271) [apply] apply:maplist_([";;    fn state_ops() {", 1367, 0], _362284, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    fn state_ops() {", 1367, 0], [_365102|_365104], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    fn state_ops() {", _365102)
^  Unify: (272) [user] mfix_vars1(";;    fn state_ops() {", _365102)
   Call: (273) [system] var(";;    fn state_ops() {")
^  Redo: (272) [user] mfix_vars1(";;    fn state_ops() {", _365102)
^  Unify: (272) [user] mfix_vars1(";;    fn state_ops() {", '$VAR'(_369748))
   Call: (273) [system] atom(";;    fn state_ops() {")
^  Redo: (272) [user] mfix_vars1(";;    fn state_ops() {", _365102)
^  Unify: (272) [user] mfix_vars1(";;    fn state_ops() {", _365102)
   Call: (273) [system] ";;    fn state_ops() {"==true
^  Redo: (272) [user] mfix_vars1(";;    fn state_ops() {", _365102)
^  Unify: (272) [user] mfix_vars1(";;    fn state_ops() {", _365102)
   Call: (273) [system] ";;    fn state_ops() {"==false
^  Redo: (272) [user] mfix_vars1(";;    fn state_ops() {", _365102)
^  Unify: (272) [user] mfix_vars1(";;    fn state_ops() {", _365102)
   Call: (273) [system] ";;    fn state_ops() {"==[_379028, _379034]
^  Redo: (272) [user] mfix_vars1(";;    fn state_ops() {", _365102)
^  Unify: (272) [user] mfix_vars1(";;    fn state_ops() {", _365102)
   Call: (273) [system] is_list(";;    fn state_ops() {")
^  Redo: (272) [user] mfix_vars1(";;    fn state_ops() {", _365102)
^  Unify: (272) [user] mfix_vars1(";;    fn state_ops() {", _365102)
   Call: (273) [system] string(";;    fn state_ops() {")
   Exit: (273) [system] string(";;    fn state_ops() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    fn state_ops() {", _365102)
^  Unify: (272) [user] mfix_vars1(";;    fn state_ops() {", _365102)
   Call: (273) [system] compound(";;    fn state_ops() {")
^  Redo: (272) [user] mfix_vars1(";;    fn state_ops() {", _365102)
^  Unify: (272) [user] mfix_vars1(";;    fn state_ops() {", _365102)
^  Call: (273) [user] symbol(";;    fn state_ops() {")
^  Unify: (273) [user] symbol(";;    fn state_ops() {")
   Call: (274) [system] atom(";;    fn state_ops() {")
   Fail: (274) [system] atom(";;    fn state_ops() {")
^  Fail: (273) [user] symbol(";;    fn state_ops() {")
^  Redo: (272) [user] mfix_vars1(";;    fn state_ops() {", _365102)
   Call: (273) [system] ";;    fn state_ops() {"=_365102
   Exit: (273) [system] ";;    fn state_ops() {"=";;    fn state_ops() {"
^  Exit: (272) [user] mfix_vars1(";;    fn state_ops() {", ";;    fn state_ops() {")
   Call: (272) [apply] apply:maplist_([1367, 0], _365104, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1367, 0], [_403100|_403102], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1367, _403100)
^  Unify: (273) [user] mfix_vars1(1367, _403100)
   Call: (274) [system] var(1367)
^  Redo: (273) [user] mfix_vars1(1367, _403100)
^  Unify: (273) [user] mfix_vars1(1367, '$VAR'(_407746))
   Call: (274) [system] atom(1367)
^  Redo: (273) [user] mfix_vars1(1367, _403100)
^  Unify: (273) [user] mfix_vars1(1367, _403100)
   Call: (274) [system] 1367==true
^  Redo: (273) [user] mfix_vars1(1367, _403100)
^  Unify: (273) [user] mfix_vars1(1367, _403100)
   Call: (274) [system] 1367==false
^  Redo: (273) [user] mfix_vars1(1367, _403100)
^  Unify: (273) [user] mfix_vars1(1367, _403100)
   Call: (274) [system] 1367==[_417026, _417032]
^  Redo: (273) [user] mfix_vars1(1367, _403100)
^  Unify: (273) [user] mfix_vars1(1367, _403100)
   Call: (274) [system] is_list(1367)
^  Redo: (273) [user] mfix_vars1(1367, _403100)
^  Unify: (273) [user] mfix_vars1(1367, _403100)
   Call: (274) [system] string(1367)
^  Redo: (273) [user] mfix_vars1(1367, _403100)
^  Unify: (273) [user] mfix_vars1(1367, _403100)
   Call: (274) [system] compound(1367)
^  Redo: (273) [user] mfix_vars1(1367, _403100)
^  Unify: (273) [user] mfix_vars1(1367, _403100)
^  Call: (274) [user] symbol(1367)
^  Unify: (274) [user] symbol(1367)
   Call: (275) [system] atom(1367)
   Fail: (275) [system] atom(1367)
^  Fail: (274) [user] symbol(1367)
^  Redo: (273) [user] mfix_vars1(1367, _403100)
   Call: (274) [system] 1367=_403100
   Exit: (274) [system] 1367=1367
^  Exit: (273) [user] mfix_vars1(1367, 1367)
   Call: (273) [apply] apply:maplist_([0], _403102, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_437426|_437428], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _437426)
^  Unify: (274) [user] mfix_vars1(0, _437426)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _437426)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_442072))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _437426)
^  Unify: (274) [user] mfix_vars1(0, _437426)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _437426)
^  Unify: (274) [user] mfix_vars1(0, _437426)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _437426)
^  Unify: (274) [user] mfix_vars1(0, _437426)
   Call: (275) [system] 0==[_451352, _451358]
^  Redo: (274) [user] mfix_vars1(0, _437426)
^  Unify: (274) [user] mfix_vars1(0, _437426)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _437426)
^  Unify: (274) [user] mfix_vars1(0, _437426)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _437426)
^  Unify: (274) [user] mfix_vars1(0, _437426)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _437426)
^  Unify: (274) [user] mfix_vars1(0, _437426)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _437426)
   Call: (275) [system] 0=_437426
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _437428, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1367, 0], [1367, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    fn state_ops() {", 1367, 0], [";;    fn state_ops() {", 1367, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn state_ops() {", 1367, 0], [";;    fn state_ops() {", 1367, 0])
   Call: (270) [system] compound_name_arguments(_331600, '$COMMENT', [";;    fn state_ops() {", 1367, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT', [";;    fn state_ops() {", 1367, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn state_ops() {", 1367, 0)\=@='$COMMENT'(";;    fn state_ops() {", 1367, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _326014)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _487600))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _487600))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _487600))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _487600))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _487600)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _487600)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _493186))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _493186))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _493186)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _493186)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    fn state_ops() {", 1367, 0), _493186)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn state_ops() {", 1367, 0)\=@='$COMMENT'(";;    fn state_ops() {", 1367, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _487600)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _320402))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _320402))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _320402))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _320402))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _320402)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _320402)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _515506))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _515506))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _515506)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _515506)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    fn state_ops() {", 1367, 0), _515506)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn state_ops() {", 1367, 0)\=@='$COMMENT'(";;    fn state_ops() {", 1367, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _5946)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0)))
   Call: (261) [system] '$COMMENT'(";;    fn state_ops() {", 1367, 0)\=@='$COMMENT'(";;    fn state_ops() {", 1367, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn state_ops() {", 1367, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    fn state_ops() {", 1367, 0), _26280, [], _26282)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn state_ops() {", 1367, 0), _26280, [], _26282)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn state_ops() {", 1367, 0), _26280, [], _26282)
   Call: (258) [system] atom('$COMMENT'(";;    fn state_ops() {", 1367, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn state_ops() {", 1367, 0), _26280, [], _26282)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn state_ops() {", 1367, 0), _26280, [], _26282)
   Call: (258) [system] compound('$COMMENT'(";;    fn state_ops() {", 1367, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    fn state_ops() {", 1367, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    fn state_ops() {", 1367, 0), _35596, _35598)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT', [";;    fn state_ops() {", 1367, 0])
^  Call: (258) [user] subst_vars([";;    fn state_ops() {", 1367, 0], _37482, [], _26282)
^  Unify: (258) [user] subst_vars([";;    fn state_ops() {", 1367, 0], [";;    fn state_ops() {", 1367, 0], [], [])
   Call: (259) [system] var([";;    fn state_ops() {", 1367, 0])
^  Redo: (258) [user] subst_vars([";;    fn state_ops() {", 1367, 0], _37482, [], _26282)
^  Unify: (258) [user] subst_vars([";;    fn state_ops() {", 1367, 0], [_41218|_41220], [], _26282)
^  Call: (259) [user] subst_vars(";;    fn state_ops() {", _41218, [], _42158)
^  Unify: (259) [user] subst_vars(";;    fn state_ops() {", ";;    fn state_ops() {", [], [])
   Call: (260) [system] var(";;    fn state_ops() {")
^  Redo: (259) [user] subst_vars(";;    fn state_ops() {", _41218, [], _42158)
^  Unify: (259) [user] subst_vars(";;    fn state_ops() {", _41218, [], _42158)
   Call: (260) [system] atom(";;    fn state_ops() {")
^  Redo: (259) [user] subst_vars(";;    fn state_ops() {", _41218, [], _42158)
^  Unify: (259) [user] subst_vars(";;    fn state_ops() {", _41218, [], _42158)
   Call: (260) [system] compound(";;    fn state_ops() {")
^  Redo: (259) [user] subst_vars(";;    fn state_ops() {", _41218, [], _42158)
^  Unify: (259) [user] subst_vars(";;    fn state_ops() {", ";;    fn state_ops() {", [], [])
^  Exit: (259) [user] subst_vars(";;    fn state_ops() {", ";;    fn state_ops() {", [], [])
^  Call: (259) [user] subst_vars([1367, 0], _41220, [], _26282)
^  Unify: (259) [user] subst_vars([1367, 0], [1367, 0], [], [])
   Call: (260) [system] var([1367, 0])
^  Redo: (259) [user] subst_vars([1367, 0], _41220, [], _26282)
^  Unify: (259) [user] subst_vars([1367, 0], [_57090|_57092], [], _26282)
^  Call: (260) [user] subst_vars(1367, _57090, [], _58030)
^  Unify: (260) [user] subst_vars(1367, 1367, [], [])
   Call: (261) [system] var(1367)
^  Redo: (260) [user] subst_vars(1367, _57090, [], _58030)
^  Unify: (260) [user] subst_vars(1367, _57090, [], _58030)
   Call: (261) [system] atom(1367)
^  Redo: (260) [user] subst_vars(1367, _57090, [], _58030)
^  Unify: (260) [user] subst_vars(1367, _57090, [], _58030)
   Call: (261) [system] compound(1367)
^  Redo: (260) [user] subst_vars(1367, _57090, [], _58030)
^  Unify: (260) [user] subst_vars(1367, 1367, [], [])
^  Exit: (260) [user] subst_vars(1367, 1367, [], [])
^  Call: (260) [user] subst_vars([0], _57092, [], _26282)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _57092, [], _26282)
^  Unify: (260) [user] subst_vars([0], [_72962|_72964], [], _26282)
^  Call: (261) [user] subst_vars(0, _72962, [], _73902)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _72962, [], _73902)
^  Unify: (261) [user] subst_vars(0, _72962, [], _73902)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _72962, [], _73902)
^  Unify: (261) [user] subst_vars(0, _72962, [], _73902)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _72962, [], _73902)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _72964, [], _26282)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _72964, [], _26282)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1367, 0], [1367, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    fn state_ops() {", 1367, 0], [";;    fn state_ops() {", 1367, 0], [], [])
   Call: (258) [system] compound_name_arguments(_26280, '$COMMENT', [";;    fn state_ops() {", 1367, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT', [";;    fn state_ops() {", 1367, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    fn state_ops() {", 1367, 0), '$COMMENT'(";;    fn state_ops() {", 1367, 0), [], [])
   Call: (257) [system] _96320=metta_file_buffer(+, '$COMMENT'(";;    fn state_ops() {", 1367, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    fn state_ops() {", 1367, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    fn state_ops() {", 1367, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn state_ops() {", 1367, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn state_ops() {", 1367, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn state_ops() {", 1367, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn state_ops() {", 1367, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn state_ops() {", 1367, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn state_ops() {", 1367, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1368, 0, 49080, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$stream_position'(49080, 1368, 0, 49114)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _149056))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _149056))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _149056)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _149056)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _149056)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _149056)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _154668))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _154668))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _154668))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _154668))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _154668)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _154668)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _160254))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _160254))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _160254)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _160254)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _160254)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _160254)
   Call: (270) [system] var('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _160254)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$VAR'(_167714))
   Call: (270) [system] atom('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _160254)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _160254)
   Call: (270) [system] '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _160254)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _160254)
   Call: (270) [system] '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _160254)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _160254)
   Call: (270) [system] '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0)==[_176994, _177000]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _160254)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _160254)
   Call: (270) [system] is_list('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _160254)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _160254)
   Call: (270) [system] string('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _160254)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _160254)
   Call: (270) [system] compound('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _187196, _187198)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT', [";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0], _190938)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0], _190938)
   Call: (271) [apply] apply:maplist_([";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0], _190938, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0], [_193756|_193758], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _193756)
^  Unify: (272) [user] mfix_vars1(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _193756)
   Call: (273) [system] var(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();")
^  Redo: (272) [user] mfix_vars1(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _193756)
^  Unify: (272) [user] mfix_vars1(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", '$VAR'(_198402))
   Call: (273) [system] atom(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();")
^  Redo: (272) [user] mfix_vars1(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _193756)
^  Unify: (272) [user] mfix_vars1(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _193756)
   Call: (273) [system] ";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();"==true
^  Redo: (272) [user] mfix_vars1(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _193756)
^  Unify: (272) [user] mfix_vars1(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _193756)
   Call: (273) [system] ";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();"==false
^  Redo: (272) [user] mfix_vars1(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _193756)
^  Unify: (272) [user] mfix_vars1(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _193756)
   Call: (273) [system] ";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();"==[_207682, _207688]
^  Redo: (272) [user] mfix_vars1(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _193756)
^  Unify: (272) [user] mfix_vars1(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _193756)
   Call: (273) [system] is_list(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();")
^  Redo: (272) [user] mfix_vars1(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _193756)
^  Unify: (272) [user] mfix_vars1(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _193756)
   Call: (273) [system] string(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();")
   Exit: (273) [system] string(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _193756)
^  Unify: (272) [user] mfix_vars1(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _193756)
   Call: (273) [system] compound(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();")
^  Redo: (272) [user] mfix_vars1(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _193756)
^  Unify: (272) [user] mfix_vars1(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _193756)
^  Call: (273) [user] symbol(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();")
^  Unify: (273) [user] symbol(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();")
   Call: (274) [system] atom(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();")
   Fail: (274) [system] atom(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();")
^  Fail: (273) [user] symbol(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();")
^  Redo: (272) [user] mfix_vars1(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _193756)
   Call: (273) [system] ";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();"=_193756
   Exit: (273) [system] ";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();"=";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();"
^  Exit: (272) [user] mfix_vars1(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", ";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();")
   Call: (272) [apply] apply:maplist_([1368, 0], _193758, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1368, 0], [_231754|_231756], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1368, _231754)
^  Unify: (273) [user] mfix_vars1(1368, _231754)
   Call: (274) [system] var(1368)
^  Redo: (273) [user] mfix_vars1(1368, _231754)
^  Unify: (273) [user] mfix_vars1(1368, '$VAR'(_236400))
   Call: (274) [system] atom(1368)
^  Redo: (273) [user] mfix_vars1(1368, _231754)
^  Unify: (273) [user] mfix_vars1(1368, _231754)
   Call: (274) [system] 1368==true
^  Redo: (273) [user] mfix_vars1(1368, _231754)
^  Unify: (273) [user] mfix_vars1(1368, _231754)
   Call: (274) [system] 1368==false
^  Redo: (273) [user] mfix_vars1(1368, _231754)
^  Unify: (273) [user] mfix_vars1(1368, _231754)
   Call: (274) [system] 1368==[_245680, _245686]
^  Redo: (273) [user] mfix_vars1(1368, _231754)
^  Unify: (273) [user] mfix_vars1(1368, _231754)
   Call: (274) [system] is_list(1368)
^  Redo: (273) [user] mfix_vars1(1368, _231754)
^  Unify: (273) [user] mfix_vars1(1368, _231754)
   Call: (274) [system] string(1368)
^  Redo: (273) [user] mfix_vars1(1368, _231754)
^  Unify: (273) [user] mfix_vars1(1368, _231754)
   Call: (274) [system] compound(1368)
^  Redo: (273) [user] mfix_vars1(1368, _231754)
^  Unify: (273) [user] mfix_vars1(1368, _231754)
^  Call: (274) [user] symbol(1368)
^  Unify: (274) [user] symbol(1368)
   Call: (275) [system] atom(1368)
   Fail: (275) [system] atom(1368)
^  Fail: (274) [user] symbol(1368)
^  Redo: (273) [user] mfix_vars1(1368, _231754)
   Call: (274) [system] 1368=_231754
   Exit: (274) [system] 1368=1368
^  Exit: (273) [user] mfix_vars1(1368, 1368)
   Call: (273) [apply] apply:maplist_([0], _231756, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_266080|_266082], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _266080)
^  Unify: (274) [user] mfix_vars1(0, _266080)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _266080)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_270726))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _266080)
^  Unify: (274) [user] mfix_vars1(0, _266080)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _266080)
^  Unify: (274) [user] mfix_vars1(0, _266080)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _266080)
^  Unify: (274) [user] mfix_vars1(0, _266080)
   Call: (275) [system] 0==[_280006, _280012]
^  Redo: (274) [user] mfix_vars1(0, _266080)
^  Unify: (274) [user] mfix_vars1(0, _266080)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _266080)
^  Unify: (274) [user] mfix_vars1(0, _266080)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _266080)
^  Unify: (274) [user] mfix_vars1(0, _266080)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _266080)
^  Unify: (274) [user] mfix_vars1(0, _266080)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _266080)
   Call: (275) [system] 0=_266080
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _266082, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1368, 0], [1368, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0], [";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0], [";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0])
   Call: (270) [system] compound_name_arguments(_160254, '$COMMENT', [";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT', [";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0)))
   Call: (267) [system] '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0)\=@='$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _154668)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _316254))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _316254))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _316254))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _316254))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _316254)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _316254)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _321840))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _321840))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _321840)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _321840)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _321840)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0)))
   Call: (267) [system] '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0)\=@='$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _316254)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _149056))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _149056))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _149056))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _149056))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _149056)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _149056)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _344160))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _344160))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _344160)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _344160)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _344160)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0)))
   Call: (267) [system] '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0)\=@='$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _149056)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0)))
   Call: (261) [system] '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0)\=@='$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _372938, [], _372940)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _372938, [], _372940)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _372938, [], _372940)
   Call: (258) [system] atom('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _372938, [], _372940)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _372938, [], _372940)
   Call: (258) [system] compound('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), _382254, _382256)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT', [";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0])
^  Call: (258) [user] subst_vars([";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0], _384140, [], _372940)
^  Unify: (258) [user] subst_vars([";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0], [";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0], [], [])
   Call: (259) [system] var([";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0])
^  Redo: (258) [user] subst_vars([";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0], _384140, [], _372940)
^  Unify: (258) [user] subst_vars([";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0], [_387876|_387878], [], _372940)
^  Call: (259) [user] subst_vars(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _387876, [], _388816)
^  Unify: (259) [user] subst_vars(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", ";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", [], [])
   Call: (260) [system] var(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();")
^  Redo: (259) [user] subst_vars(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _387876, [], _388816)
^  Unify: (259) [user] subst_vars(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _387876, [], _388816)
   Call: (260) [system] atom(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();")
^  Redo: (259) [user] subst_vars(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _387876, [], _388816)
^  Unify: (259) [user] subst_vars(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _387876, [], _388816)
   Call: (260) [system] compound(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();")
^  Redo: (259) [user] subst_vars(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", _387876, [], _388816)
^  Unify: (259) [user] subst_vars(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", ";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", [], [])
^  Exit: (259) [user] subst_vars(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", ";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", [], [])
^  Call: (259) [user] subst_vars([1368, 0], _387878, [], _372940)
^  Unify: (259) [user] subst_vars([1368, 0], [1368, 0], [], [])
   Call: (260) [system] var([1368, 0])
^  Redo: (259) [user] subst_vars([1368, 0], _387878, [], _372940)
^  Unify: (259) [user] subst_vars([1368, 0], [_403748|_403750], [], _372940)
^  Call: (260) [user] subst_vars(1368, _403748, [], _404688)
^  Unify: (260) [user] subst_vars(1368, 1368, [], [])
   Call: (261) [system] var(1368)
^  Redo: (260) [user] subst_vars(1368, _403748, [], _404688)
^  Unify: (260) [user] subst_vars(1368, _403748, [], _404688)
   Call: (261) [system] atom(1368)
^  Redo: (260) [user] subst_vars(1368, _403748, [], _404688)
^  Unify: (260) [user] subst_vars(1368, _403748, [], _404688)
   Call: (261) [system] compound(1368)
^  Redo: (260) [user] subst_vars(1368, _403748, [], _404688)
^  Unify: (260) [user] subst_vars(1368, 1368, [], [])
^  Exit: (260) [user] subst_vars(1368, 1368, [], [])
^  Call: (260) [user] subst_vars([0], _403750, [], _372940)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _403750, [], _372940)
^  Unify: (260) [user] subst_vars([0], [_419620|_419622], [], _372940)
^  Call: (261) [user] subst_vars(0, _419620, [], _420560)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _419620, [], _420560)
^  Unify: (261) [user] subst_vars(0, _419620, [], _420560)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _419620, [], _420560)
^  Unify: (261) [user] subst_vars(0, _419620, [], _420560)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _419620, [], _420560)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _419622, [], _372940)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _419622, [], _372940)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1368, 0], [1368, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0], [";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0], [], [])
   Call: (258) [system] compound_name_arguments(_372938, '$COMMENT', [";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT', [";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), [], [])
   Call: (257) [system] _442978=metta_file_buffer(+, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let result = NewStateOp{}.execute(&mut vec![expr!(\"A\" \"B\")]).unwrap();", 1368, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1369, 0, 49161, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$stream_position'(49161, 1369, 0, 49195)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _495710))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _495710))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _495710)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _495710)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _495710)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _495710)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _501322))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _501322))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _501322))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _501322))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _501322)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _501322)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _506908))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _506908))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _506908)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _506908)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _506908)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _506908)
   Call: (270) [system] var('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _506908)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$VAR'(_514368))
   Call: (270) [system] atom('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _506908)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _506908)
   Call: (270) [system] '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _506908)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _506908)
   Call: (270) [system] '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _506908)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _506908)
   Call: (270) [system] '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0)==[_6010, _6016]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _5992)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _5992)
   Call: (270) [system] is_list('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _5992)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _5992)
   Call: (270) [system] string('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _5992)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _5992)
   Call: (270) [system] compound('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _15946, _15948)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT', [";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0], _19688)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0], _19688)
   Call: (271) [apply] apply:maplist_([";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0], _19688, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0], [_22506|_22508], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _22506)
^  Unify: (272) [user] mfix_vars1(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _22506)
   Call: (273) [system] var(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();")
^  Redo: (272) [user] mfix_vars1(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _22506)
^  Unify: (272) [user] mfix_vars1(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", '$VAR'(_27152))
   Call: (273) [system] atom(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();")
^  Redo: (272) [user] mfix_vars1(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _22506)
^  Unify: (272) [user] mfix_vars1(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _22506)
   Call: (273) [system] ";;        let old_state = result.get(0).ok_or(\"error\").unwrap();"==true
^  Redo: (272) [user] mfix_vars1(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _22506)
^  Unify: (272) [user] mfix_vars1(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _22506)
   Call: (273) [system] ";;        let old_state = result.get(0).ok_or(\"error\").unwrap();"==false
^  Redo: (272) [user] mfix_vars1(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _22506)
^  Unify: (272) [user] mfix_vars1(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _22506)
   Call: (273) [system] ";;        let old_state = result.get(0).ok_or(\"error\").unwrap();"==[_36432, _36438]
^  Redo: (272) [user] mfix_vars1(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _22506)
^  Unify: (272) [user] mfix_vars1(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _22506)
   Call: (273) [system] is_list(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();")
^  Redo: (272) [user] mfix_vars1(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _22506)
^  Unify: (272) [user] mfix_vars1(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _22506)
   Call: (273) [system] string(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();")
   Exit: (273) [system] string(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _22506)
^  Unify: (272) [user] mfix_vars1(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _22506)
   Call: (273) [system] compound(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();")
^  Redo: (272) [user] mfix_vars1(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _22506)
^  Unify: (272) [user] mfix_vars1(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _22506)
^  Call: (273) [user] symbol(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();")
^  Unify: (273) [user] symbol(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();")
   Call: (274) [system] atom(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();")
   Fail: (274) [system] atom(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();")
^  Fail: (273) [user] symbol(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();")
^  Redo: (272) [user] mfix_vars1(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _22506)
   Call: (273) [system] ";;        let old_state = result.get(0).ok_or(\"error\").unwrap();"=_22506
   Exit: (273) [system] ";;        let old_state = result.get(0).ok_or(\"error\").unwrap();"=";;        let old_state = result.get(0).ok_or(\"error\").unwrap();"
^  Exit: (272) [user] mfix_vars1(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", ";;        let old_state = result.get(0).ok_or(\"error\").unwrap();")
   Call: (272) [apply] apply:maplist_([1369, 0], _22508, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1369, 0], [_60504|_60506], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1369, _60504)
^  Unify: (273) [user] mfix_vars1(1369, _60504)
   Call: (274) [system] var(1369)
^  Redo: (273) [user] mfix_vars1(1369, _60504)
^  Unify: (273) [user] mfix_vars1(1369, '$VAR'(_65150))
   Call: (274) [system] atom(1369)
^  Redo: (273) [user] mfix_vars1(1369, _60504)
^  Unify: (273) [user] mfix_vars1(1369, _60504)
   Call: (274) [system] 1369==true
^  Redo: (273) [user] mfix_vars1(1369, _60504)
^  Unify: (273) [user] mfix_vars1(1369, _60504)
   Call: (274) [system] 1369==false
^  Redo: (273) [user] mfix_vars1(1369, _60504)
^  Unify: (273) [user] mfix_vars1(1369, _60504)
   Call: (274) [system] 1369==[_74430, _74436]
^  Redo: (273) [user] mfix_vars1(1369, _60504)
^  Unify: (273) [user] mfix_vars1(1369, _60504)
   Call: (274) [system] is_list(1369)
^  Redo: (273) [user] mfix_vars1(1369, _60504)
^  Unify: (273) [user] mfix_vars1(1369, _60504)
   Call: (274) [system] string(1369)
^  Redo: (273) [user] mfix_vars1(1369, _60504)
^  Unify: (273) [user] mfix_vars1(1369, _60504)
   Call: (274) [system] compound(1369)
^  Redo: (273) [user] mfix_vars1(1369, _60504)
^  Unify: (273) [user] mfix_vars1(1369, _60504)
^  Call: (274) [user] symbol(1369)
^  Unify: (274) [user] symbol(1369)
   Call: (275) [system] atom(1369)
   Fail: (275) [system] atom(1369)
^  Fail: (274) [user] symbol(1369)
^  Redo: (273) [user] mfix_vars1(1369, _60504)
   Call: (274) [system] 1369=_60504
   Exit: (274) [system] 1369=1369
^  Exit: (273) [user] mfix_vars1(1369, 1369)
   Call: (273) [apply] apply:maplist_([0], _60506, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_94830|_94832], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _94830)
^  Unify: (274) [user] mfix_vars1(0, _94830)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _94830)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_99476))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _94830)
^  Unify: (274) [user] mfix_vars1(0, _94830)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _94830)
^  Unify: (274) [user] mfix_vars1(0, _94830)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _94830)
^  Unify: (274) [user] mfix_vars1(0, _94830)
   Call: (275) [system] 0==[_108756, _108762]
^  Redo: (274) [user] mfix_vars1(0, _94830)
^  Unify: (274) [user] mfix_vars1(0, _94830)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _94830)
^  Unify: (274) [user] mfix_vars1(0, _94830)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _94830)
^  Unify: (274) [user] mfix_vars1(0, _94830)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _94830)
^  Unify: (274) [user] mfix_vars1(0, _94830)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _94830)
   Call: (275) [system] 0=_94830
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _94832, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1369, 0], [1369, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0], [";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0], [";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0])
   Call: (270) [system] compound_name_arguments(_5992, '$COMMENT', [";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT', [";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0)))
   Call: (267) [system] '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0)\=@='$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _5978)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _145004))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _145004))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _145004))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _145004))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _145004)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _145004)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _150590))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _150590))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _150590)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _150590)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _150590)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0)))
   Call: (267) [system] '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0)\=@='$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _145004)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _5958))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _5958))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _5958))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _5958))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _5958)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _5958)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _172910))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _172910))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _172910)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _172910)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _172910)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0)))
   Call: (267) [system] '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0)\=@='$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _5958)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0)))
   Call: (261) [system] '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0)\=@='$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _201688, [], _201690)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _201688, [], _201690)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _201688, [], _201690)
   Call: (258) [system] atom('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _201688, [], _201690)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _201688, [], _201690)
   Call: (258) [system] compound('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), _211004, _211006)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT', [";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0])
^  Call: (258) [user] subst_vars([";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0], _212890, [], _201690)
^  Unify: (258) [user] subst_vars([";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0], [";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0], [], [])
   Call: (259) [system] var([";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0])
^  Redo: (258) [user] subst_vars([";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0], _212890, [], _201690)
^  Unify: (258) [user] subst_vars([";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0], [_216626|_216628], [], _201690)
^  Call: (259) [user] subst_vars(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _216626, [], _217566)
^  Unify: (259) [user] subst_vars(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", ";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", [], [])
   Call: (260) [system] var(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();")
^  Redo: (259) [user] subst_vars(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _216626, [], _217566)
^  Unify: (259) [user] subst_vars(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _216626, [], _217566)
   Call: (260) [system] atom(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();")
^  Redo: (259) [user] subst_vars(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _216626, [], _217566)
^  Unify: (259) [user] subst_vars(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _216626, [], _217566)
   Call: (260) [system] compound(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();")
^  Redo: (259) [user] subst_vars(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", _216626, [], _217566)
^  Unify: (259) [user] subst_vars(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", ";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", [], [])
^  Exit: (259) [user] subst_vars(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", ";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", [], [])
^  Call: (259) [user] subst_vars([1369, 0], _216628, [], _201690)
^  Unify: (259) [user] subst_vars([1369, 0], [1369, 0], [], [])
   Call: (260) [system] var([1369, 0])
^  Redo: (259) [user] subst_vars([1369, 0], _216628, [], _201690)
^  Unify: (259) [user] subst_vars([1369, 0], [_232498|_232500], [], _201690)
^  Call: (260) [user] subst_vars(1369, _232498, [], _233438)
^  Unify: (260) [user] subst_vars(1369, 1369, [], [])
   Call: (261) [system] var(1369)
^  Redo: (260) [user] subst_vars(1369, _232498, [], _233438)
^  Unify: (260) [user] subst_vars(1369, _232498, [], _233438)
   Call: (261) [system] atom(1369)
^  Redo: (260) [user] subst_vars(1369, _232498, [], _233438)
^  Unify: (260) [user] subst_vars(1369, _232498, [], _233438)
   Call: (261) [system] compound(1369)
^  Redo: (260) [user] subst_vars(1369, _232498, [], _233438)
^  Unify: (260) [user] subst_vars(1369, 1369, [], [])
^  Exit: (260) [user] subst_vars(1369, 1369, [], [])
^  Call: (260) [user] subst_vars([0], _232500, [], _201690)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _232500, [], _201690)
^  Unify: (260) [user] subst_vars([0], [_248370|_248372], [], _201690)
^  Call: (261) [user] subst_vars(0, _248370, [], _249310)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _248370, [], _249310)
^  Unify: (261) [user] subst_vars(0, _248370, [], _249310)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _248370, [], _249310)
^  Unify: (261) [user] subst_vars(0, _248370, [], _249310)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _248370, [], _249310)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _248372, [], _201690)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _248372, [], _201690)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1369, 0], [1369, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0], [";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0], [], [])
   Call: (258) [system] compound_name_arguments(_201688, '$COMMENT', [";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT', [";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), [], [])
   Call: (257) [system] _271728=metta_file_buffer(+, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let old_state = result.get(0).ok_or(\"error\").unwrap();", 1369, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1370, 0, 49226, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$stream_position'(49226, 1370, 0, 49260)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _324462))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _324462))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _324462)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _324462)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _324462)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _324462)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _330074))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _330074))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _330074))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _330074))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _330074)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _330074)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _335660))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _335660))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _335660)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _335660)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _335660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _335660)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _335660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$VAR'(_343120))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _335660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _335660)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _335660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _335660)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _335660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _335660)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0)==[_352400, _352406]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _335660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _335660)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _335660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _335660)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _335660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _335660)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _362602, _362604)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT', [";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0], _366344)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0], _366344)
   Call: (271) [apply] apply:maplist_([";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0], _366344, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0], [_369162|_369164], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _369162)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _369162)
   Call: (273) [system] var(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _369162)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", '$VAR'(_373808))
   Call: (273) [system] atom(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _369162)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _369162)
   Call: (273) [system] ";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _369162)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _369162)
   Call: (273) [system] ";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _369162)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _369162)
   Call: (273) [system] ";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));"==[_383088, _383094]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _369162)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _369162)
   Call: (273) [system] is_list(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _369162)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _369162)
   Call: (273) [system] string(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));")
   Exit: (273) [system] string(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _369162)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _369162)
   Call: (273) [system] compound(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _369162)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _369162)
^  Call: (273) [user] symbol(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));")
^  Unify: (273) [user] symbol(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));")
   Call: (274) [system] atom(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));")
   Fail: (274) [system] atom(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));")
^  Fail: (273) [user] symbol(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _369162)
   Call: (273) [system] ";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));"=_369162
   Exit: (273) [system] ";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));"=";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", ";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));")
   Call: (272) [apply] apply:maplist_([1370, 0], _369164, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1370, 0], [_407160|_407162], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1370, _407160)
^  Unify: (273) [user] mfix_vars1(1370, _407160)
   Call: (274) [system] var(1370)
^  Redo: (273) [user] mfix_vars1(1370, _407160)
^  Unify: (273) [user] mfix_vars1(1370, '$VAR'(_411806))
   Call: (274) [system] atom(1370)
^  Redo: (273) [user] mfix_vars1(1370, _407160)
^  Unify: (273) [user] mfix_vars1(1370, _407160)
   Call: (274) [system] 1370==true
^  Redo: (273) [user] mfix_vars1(1370, _407160)
^  Unify: (273) [user] mfix_vars1(1370, _407160)
   Call: (274) [system] 1370==false
^  Redo: (273) [user] mfix_vars1(1370, _407160)
^  Unify: (273) [user] mfix_vars1(1370, _407160)
   Call: (274) [system] 1370==[_421086, _421092]
^  Redo: (273) [user] mfix_vars1(1370, _407160)
^  Unify: (273) [user] mfix_vars1(1370, _407160)
   Call: (274) [system] is_list(1370)
^  Redo: (273) [user] mfix_vars1(1370, _407160)
^  Unify: (273) [user] mfix_vars1(1370, _407160)
   Call: (274) [system] string(1370)
^  Redo: (273) [user] mfix_vars1(1370, _407160)
^  Unify: (273) [user] mfix_vars1(1370, _407160)
   Call: (274) [system] compound(1370)
^  Redo: (273) [user] mfix_vars1(1370, _407160)
^  Unify: (273) [user] mfix_vars1(1370, _407160)
^  Call: (274) [user] symbol(1370)
^  Unify: (274) [user] symbol(1370)
   Call: (275) [system] atom(1370)
   Fail: (275) [system] atom(1370)
^  Fail: (274) [user] symbol(1370)
^  Redo: (273) [user] mfix_vars1(1370, _407160)
   Call: (274) [system] 1370=_407160
   Exit: (274) [system] 1370=1370
^  Exit: (273) [user] mfix_vars1(1370, 1370)
   Call: (273) [apply] apply:maplist_([0], _407162, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_441486|_441488], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _441486)
^  Unify: (274) [user] mfix_vars1(0, _441486)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _441486)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_446132))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _441486)
^  Unify: (274) [user] mfix_vars1(0, _441486)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _441486)
^  Unify: (274) [user] mfix_vars1(0, _441486)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _441486)
^  Unify: (274) [user] mfix_vars1(0, _441486)
   Call: (275) [system] 0==[_455412, _455418]
^  Redo: (274) [user] mfix_vars1(0, _441486)
^  Unify: (274) [user] mfix_vars1(0, _441486)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _441486)
^  Unify: (274) [user] mfix_vars1(0, _441486)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _441486)
^  Unify: (274) [user] mfix_vars1(0, _441486)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _441486)
^  Unify: (274) [user] mfix_vars1(0, _441486)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _441486)
   Call: (275) [system] 0=_441486
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _441488, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1370, 0], [1370, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0], [";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0], [";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0])
   Call: (270) [system] compound_name_arguments(_335660, '$COMMENT', [";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT', [";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0)\=@='$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _330074)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _491660))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _491660))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _491660))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _491660))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _491660)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _491660)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _497246))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _497246))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _497246)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _497246)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _497246)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0)\=@='$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _491660)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _324462))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _324462))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _324462))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _324462))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _324462)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _324462)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _519566))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _519566))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _519566)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _519566)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _5998)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0)\=@='$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _5960)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0)\=@='$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _30464, [], _30466)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _30464, [], _30466)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _30464, [], _30466)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _30464, [], _30466)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _30464, [], _30466)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), _39780, _39782)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT', [";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0], _41666, [], _30466)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0], [";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0], [], [])
   Call: (259) [system] var([";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0], _41666, [], _30466)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0], [_45402|_45404], [], _30466)
^  Call: (259) [user] subst_vars(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _45402, [], _46342)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", ";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", [], [])
   Call: (260) [system] var(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _45402, [], _46342)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _45402, [], _46342)
   Call: (260) [system] atom(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _45402, [], _46342)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _45402, [], _46342)
   Call: (260) [system] compound(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", _45402, [], _46342)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", ";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", ";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", [], [])
^  Call: (259) [user] subst_vars([1370, 0], _45404, [], _30466)
^  Unify: (259) [user] subst_vars([1370, 0], [1370, 0], [], [])
   Call: (260) [system] var([1370, 0])
^  Redo: (259) [user] subst_vars([1370, 0], _45404, [], _30466)
^  Unify: (259) [user] subst_vars([1370, 0], [_61274|_61276], [], _30466)
^  Call: (260) [user] subst_vars(1370, _61274, [], _62214)
^  Unify: (260) [user] subst_vars(1370, 1370, [], [])
   Call: (261) [system] var(1370)
^  Redo: (260) [user] subst_vars(1370, _61274, [], _62214)
^  Unify: (260) [user] subst_vars(1370, _61274, [], _62214)
   Call: (261) [system] atom(1370)
^  Redo: (260) [user] subst_vars(1370, _61274, [], _62214)
^  Unify: (260) [user] subst_vars(1370, _61274, [], _62214)
   Call: (261) [system] compound(1370)
^  Redo: (260) [user] subst_vars(1370, _61274, [], _62214)
^  Unify: (260) [user] subst_vars(1370, 1370, [], [])
^  Exit: (260) [user] subst_vars(1370, 1370, [], [])
^  Call: (260) [user] subst_vars([0], _61276, [], _30466)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _61276, [], _30466)
^  Unify: (260) [user] subst_vars([0], [_77146|_77148], [], _30466)
^  Call: (261) [user] subst_vars(0, _77146, [], _78086)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _77146, [], _78086)
^  Unify: (261) [user] subst_vars(0, _77146, [], _78086)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _77146, [], _78086)
^  Unify: (261) [user] subst_vars(0, _77146, [], _78086)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _77146, [], _78086)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _77148, [], _30466)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _77148, [], _30466)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1370, 0], [1370, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0], [";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0], [], [])
   Call: (258) [system] compound_name_arguments(_30464, '$COMMENT', [";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT', [";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), [], [])
   Call: (257) [system] _100504=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(old_state, &Atom::gnd(StateAtom::new(expr!(\"A\" \"B\"))));", 1370, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1371, 0, 49303, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$stream_position'(49303, 1371, 0, 49337)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _153244))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _153244))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _153244)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _153244)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _153244)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _153244)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _158856))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _158856))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _158856))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _158856))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _158856)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _158856)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _164442))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _164442))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _164442)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _164442)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _164442)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _164442)
   Call: (270) [system] var('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _164442)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$VAR'(_171902))
   Call: (270) [system] atom('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _164442)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _164442)
   Call: (270) [system] '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _164442)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _164442)
   Call: (270) [system] '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _164442)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _164442)
   Call: (270) [system] '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0)==[_181182, _181188]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _164442)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _164442)
   Call: (270) [system] is_list('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _164442)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _164442)
   Call: (270) [system] string('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _164442)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _164442)
   Call: (270) [system] compound('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _191384, _191386)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT', [";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0], _195126)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0], _195126)
   Call: (271) [apply] apply:maplist_([";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0], _195126, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0], [_197944|_197946], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _197944)
^  Unify: (272) [user] mfix_vars1(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _197944)
   Call: (273) [system] var(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();")
^  Redo: (272) [user] mfix_vars1(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _197944)
^  Unify: (272) [user] mfix_vars1(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", '$VAR'(_202590))
   Call: (273) [system] atom(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();")
^  Redo: (272) [user] mfix_vars1(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _197944)
^  Unify: (272) [user] mfix_vars1(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _197944)
   Call: (273) [system] ";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();"==true
^  Redo: (272) [user] mfix_vars1(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _197944)
^  Unify: (272) [user] mfix_vars1(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _197944)
   Call: (273) [system] ";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();"==false
^  Redo: (272) [user] mfix_vars1(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _197944)
^  Unify: (272) [user] mfix_vars1(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _197944)
   Call: (273) [system] ";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();"==[_211870, _211876]
^  Redo: (272) [user] mfix_vars1(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _197944)
^  Unify: (272) [user] mfix_vars1(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _197944)
   Call: (273) [system] is_list(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();")
^  Redo: (272) [user] mfix_vars1(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _197944)
^  Unify: (272) [user] mfix_vars1(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _197944)
   Call: (273) [system] string(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();")
   Exit: (273) [system] string(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _197944)
^  Unify: (272) [user] mfix_vars1(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _197944)
   Call: (273) [system] compound(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();")
^  Redo: (272) [user] mfix_vars1(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _197944)
^  Unify: (272) [user] mfix_vars1(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _197944)
^  Call: (273) [user] symbol(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();")
^  Unify: (273) [user] symbol(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();")
   Call: (274) [system] atom(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();")
   Fail: (274) [system] atom(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();")
^  Fail: (273) [user] symbol(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();")
^  Redo: (272) [user] mfix_vars1(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _197944)
   Call: (273) [system] ";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();"=_197944
   Exit: (273) [system] ";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();"=";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();"
^  Exit: (272) [user] mfix_vars1(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", ";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();")
   Call: (272) [apply] apply:maplist_([1371, 0], _197946, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1371, 0], [_235942|_235944], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1371, _235942)
^  Unify: (273) [user] mfix_vars1(1371, _235942)
   Call: (274) [system] var(1371)
^  Redo: (273) [user] mfix_vars1(1371, _235942)
^  Unify: (273) [user] mfix_vars1(1371, '$VAR'(_240588))
   Call: (274) [system] atom(1371)
^  Redo: (273) [user] mfix_vars1(1371, _235942)
^  Unify: (273) [user] mfix_vars1(1371, _235942)
   Call: (274) [system] 1371==true
^  Redo: (273) [user] mfix_vars1(1371, _235942)
^  Unify: (273) [user] mfix_vars1(1371, _235942)
   Call: (274) [system] 1371==false
^  Redo: (273) [user] mfix_vars1(1371, _235942)
^  Unify: (273) [user] mfix_vars1(1371, _235942)
   Call: (274) [system] 1371==[_249868, _249874]
^  Redo: (273) [user] mfix_vars1(1371, _235942)
^  Unify: (273) [user] mfix_vars1(1371, _235942)
   Call: (274) [system] is_list(1371)
^  Redo: (273) [user] mfix_vars1(1371, _235942)
^  Unify: (273) [user] mfix_vars1(1371, _235942)
   Call: (274) [system] string(1371)
^  Redo: (273) [user] mfix_vars1(1371, _235942)
^  Unify: (273) [user] mfix_vars1(1371, _235942)
   Call: (274) [system] compound(1371)
^  Redo: (273) [user] mfix_vars1(1371, _235942)
^  Unify: (273) [user] mfix_vars1(1371, _235942)
^  Call: (274) [user] symbol(1371)
^  Unify: (274) [user] symbol(1371)
   Call: (275) [system] atom(1371)
   Fail: (275) [system] atom(1371)
^  Fail: (274) [user] symbol(1371)
^  Redo: (273) [user] mfix_vars1(1371, _235942)
   Call: (274) [system] 1371=_235942
   Exit: (274) [system] 1371=1371
^  Exit: (273) [user] mfix_vars1(1371, 1371)
   Call: (273) [apply] apply:maplist_([0], _235944, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_270268|_270270], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _270268)
^  Unify: (274) [user] mfix_vars1(0, _270268)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _270268)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_274914))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _270268)
^  Unify: (274) [user] mfix_vars1(0, _270268)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _270268)
^  Unify: (274) [user] mfix_vars1(0, _270268)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _270268)
^  Unify: (274) [user] mfix_vars1(0, _270268)
   Call: (275) [system] 0==[_284194, _284200]
^  Redo: (274) [user] mfix_vars1(0, _270268)
^  Unify: (274) [user] mfix_vars1(0, _270268)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _270268)
^  Unify: (274) [user] mfix_vars1(0, _270268)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _270268)
^  Unify: (274) [user] mfix_vars1(0, _270268)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _270268)
^  Unify: (274) [user] mfix_vars1(0, _270268)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _270268)
   Call: (275) [system] 0=_270268
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _270270, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1371, 0], [1371, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0], [";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0], [";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0])
   Call: (270) [system] compound_name_arguments(_164442, '$COMMENT', [";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT', [";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0)))
   Call: (267) [system] '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0)\=@='$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _158856)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _320442))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _320442))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _320442))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _320442))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _320442)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _320442)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _326028))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _326028))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _326028)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _326028)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _326028)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0)))
   Call: (267) [system] '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0)\=@='$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _320442)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _153244))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _153244))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _153244))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _153244))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _153244)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _153244)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _348348))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _348348))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _348348)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _348348)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _348348)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0)))
   Call: (267) [system] '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0)\=@='$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _153244)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0)))
   Call: (261) [system] '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0)\=@='$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _377126, [], _377128)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _377126, [], _377128)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _377126, [], _377128)
   Call: (258) [system] atom('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _377126, [], _377128)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _377126, [], _377128)
   Call: (258) [system] compound('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), _386442, _386444)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT', [";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0])
^  Call: (258) [user] subst_vars([";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0], _388328, [], _377128)
^  Unify: (258) [user] subst_vars([";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0], [";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0], [], [])
   Call: (259) [system] var([";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0])
^  Redo: (258) [user] subst_vars([";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0], _388328, [], _377128)
^  Unify: (258) [user] subst_vars([";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0], [_392064|_392066], [], _377128)
^  Call: (259) [user] subst_vars(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _392064, [], _393004)
^  Unify: (259) [user] subst_vars(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", ";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", [], [])
   Call: (260) [system] var(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();")
^  Redo: (259) [user] subst_vars(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _392064, [], _393004)
^  Unify: (259) [user] subst_vars(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _392064, [], _393004)
   Call: (260) [system] atom(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();")
^  Redo: (259) [user] subst_vars(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _392064, [], _393004)
^  Unify: (259) [user] subst_vars(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _392064, [], _393004)
   Call: (260) [system] compound(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();")
^  Redo: (259) [user] subst_vars(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", _392064, [], _393004)
^  Unify: (259) [user] subst_vars(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", ";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", [], [])
^  Exit: (259) [user] subst_vars(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", ";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", [], [])
^  Call: (259) [user] subst_vars([1371, 0], _392066, [], _377128)
^  Unify: (259) [user] subst_vars([1371, 0], [1371, 0], [], [])
   Call: (260) [system] var([1371, 0])
^  Redo: (259) [user] subst_vars([1371, 0], _392066, [], _377128)
^  Unify: (259) [user] subst_vars([1371, 0], [_407936|_407938], [], _377128)
^  Call: (260) [user] subst_vars(1371, _407936, [], _408876)
^  Unify: (260) [user] subst_vars(1371, 1371, [], [])
   Call: (261) [system] var(1371)
^  Redo: (260) [user] subst_vars(1371, _407936, [], _408876)
^  Unify: (260) [user] subst_vars(1371, _407936, [], _408876)
   Call: (261) [system] atom(1371)
^  Redo: (260) [user] subst_vars(1371, _407936, [], _408876)
^  Unify: (260) [user] subst_vars(1371, _407936, [], _408876)
   Call: (261) [system] compound(1371)
^  Redo: (260) [user] subst_vars(1371, _407936, [], _408876)
^  Unify: (260) [user] subst_vars(1371, 1371, [], [])
^  Exit: (260) [user] subst_vars(1371, 1371, [], [])
^  Call: (260) [user] subst_vars([0], _407938, [], _377128)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _407938, [], _377128)
^  Unify: (260) [user] subst_vars([0], [_423808|_423810], [], _377128)
^  Call: (261) [user] subst_vars(0, _423808, [], _424748)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _423808, [], _424748)
^  Unify: (261) [user] subst_vars(0, _423808, [], _424748)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _423808, [], _424748)
^  Unify: (261) [user] subst_vars(0, _423808, [], _424748)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _423808, [], _424748)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _423810, [], _377128)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _423810, [], _377128)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1371, 0], [1371, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0], [";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0], [], [])
   Call: (258) [system] compound_name_arguments(_377126, '$COMMENT', [";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT', [";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), [], [])
   Call: (257) [system] _447166=metta_file_buffer(+, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let result = ChangeStateOp{}.execute(&mut vec!(old_state.clone(), expr!(\"C\" \"D\"))).unwrap();", 1371, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1372, 0, 49406, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$stream_position'(49406, 1372, 0, 49440)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _499898))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _499898))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _499898)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _499898)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _499898)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _499898)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _505510))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _505510))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _505510))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _505510))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _505510)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _505510)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _511096))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _511096))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _511096)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _511096)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _511096)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _511096)
   Call: (270) [system] var('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _511096)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$VAR'(_518556))
   Call: (270) [system] atom('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _511096)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _511096)
   Call: (270) [system] '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _511096)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _5992)
   Call: (270) [system] '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _5992)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _5992)
   Call: (270) [system] '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0)==[_9686, _9692]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _5992)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _5992)
   Call: (270) [system] is_list('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _5992)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _5992)
   Call: (270) [system] string('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _5992)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _5992)
   Call: (270) [system] compound('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _19888, _19890)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT', [";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0], _23630)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0], _23630)
   Call: (271) [apply] apply:maplist_([";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0], _23630, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0], [_26448|_26450], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _26448)
^  Unify: (272) [user] mfix_vars1(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _26448)
   Call: (273) [system] var(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();")
^  Redo: (272) [user] mfix_vars1(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _26448)
^  Unify: (272) [user] mfix_vars1(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", '$VAR'(_31094))
   Call: (273) [system] atom(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();")
^  Redo: (272) [user] mfix_vars1(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _26448)
^  Unify: (272) [user] mfix_vars1(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _26448)
   Call: (273) [system] ";;        let new_state = result.get(0).ok_or(\"error\").unwrap();"==true
^  Redo: (272) [user] mfix_vars1(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _26448)
^  Unify: (272) [user] mfix_vars1(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _26448)
   Call: (273) [system] ";;        let new_state = result.get(0).ok_or(\"error\").unwrap();"==false
^  Redo: (272) [user] mfix_vars1(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _26448)
^  Unify: (272) [user] mfix_vars1(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _26448)
   Call: (273) [system] ";;        let new_state = result.get(0).ok_or(\"error\").unwrap();"==[_40374, _40380]
^  Redo: (272) [user] mfix_vars1(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _26448)
^  Unify: (272) [user] mfix_vars1(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _26448)
   Call: (273) [system] is_list(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();")
^  Redo: (272) [user] mfix_vars1(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _26448)
^  Unify: (272) [user] mfix_vars1(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _26448)
   Call: (273) [system] string(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();")
   Exit: (273) [system] string(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _26448)
^  Unify: (272) [user] mfix_vars1(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _26448)
   Call: (273) [system] compound(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();")
^  Redo: (272) [user] mfix_vars1(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _26448)
^  Unify: (272) [user] mfix_vars1(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _26448)
^  Call: (273) [user] symbol(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();")
^  Unify: (273) [user] symbol(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();")
   Call: (274) [system] atom(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();")
   Fail: (274) [system] atom(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();")
^  Fail: (273) [user] symbol(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();")
^  Redo: (272) [user] mfix_vars1(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _26448)
   Call: (273) [system] ";;        let new_state = result.get(0).ok_or(\"error\").unwrap();"=_26448
   Exit: (273) [system] ";;        let new_state = result.get(0).ok_or(\"error\").unwrap();"=";;        let new_state = result.get(0).ok_or(\"error\").unwrap();"
^  Exit: (272) [user] mfix_vars1(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", ";;        let new_state = result.get(0).ok_or(\"error\").unwrap();")
   Call: (272) [apply] apply:maplist_([1372, 0], _26450, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1372, 0], [_64446|_64448], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1372, _64446)
^  Unify: (273) [user] mfix_vars1(1372, _64446)
   Call: (274) [system] var(1372)
^  Redo: (273) [user] mfix_vars1(1372, _64446)
^  Unify: (273) [user] mfix_vars1(1372, '$VAR'(_69092))
   Call: (274) [system] atom(1372)
^  Redo: (273) [user] mfix_vars1(1372, _64446)
^  Unify: (273) [user] mfix_vars1(1372, _64446)
   Call: (274) [system] 1372==true
^  Redo: (273) [user] mfix_vars1(1372, _64446)
^  Unify: (273) [user] mfix_vars1(1372, _64446)
   Call: (274) [system] 1372==false
^  Redo: (273) [user] mfix_vars1(1372, _64446)
^  Unify: (273) [user] mfix_vars1(1372, _64446)
   Call: (274) [system] 1372==[_78372, _78378]
^  Redo: (273) [user] mfix_vars1(1372, _64446)
^  Unify: (273) [user] mfix_vars1(1372, _64446)
   Call: (274) [system] is_list(1372)
^  Redo: (273) [user] mfix_vars1(1372, _64446)
^  Unify: (273) [user] mfix_vars1(1372, _64446)
   Call: (274) [system] string(1372)
^  Redo: (273) [user] mfix_vars1(1372, _64446)
^  Unify: (273) [user] mfix_vars1(1372, _64446)
   Call: (274) [system] compound(1372)
^  Redo: (273) [user] mfix_vars1(1372, _64446)
^  Unify: (273) [user] mfix_vars1(1372, _64446)
^  Call: (274) [user] symbol(1372)
^  Unify: (274) [user] symbol(1372)
   Call: (275) [system] atom(1372)
   Fail: (275) [system] atom(1372)
^  Fail: (274) [user] symbol(1372)
^  Redo: (273) [user] mfix_vars1(1372, _64446)
   Call: (274) [system] 1372=_64446
   Exit: (274) [system] 1372=1372
^  Exit: (273) [user] mfix_vars1(1372, 1372)
   Call: (273) [apply] apply:maplist_([0], _64448, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_98772|_98774], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _98772)
^  Unify: (274) [user] mfix_vars1(0, _98772)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _98772)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_103418))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _98772)
^  Unify: (274) [user] mfix_vars1(0, _98772)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _98772)
^  Unify: (274) [user] mfix_vars1(0, _98772)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _98772)
^  Unify: (274) [user] mfix_vars1(0, _98772)
   Call: (275) [system] 0==[_112698, _112704]
^  Redo: (274) [user] mfix_vars1(0, _98772)
^  Unify: (274) [user] mfix_vars1(0, _98772)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _98772)
^  Unify: (274) [user] mfix_vars1(0, _98772)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _98772)
^  Unify: (274) [user] mfix_vars1(0, _98772)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _98772)
^  Unify: (274) [user] mfix_vars1(0, _98772)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _98772)
   Call: (275) [system] 0=_98772
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _98774, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1372, 0], [1372, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0], [";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0], [";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0])
   Call: (270) [system] compound_name_arguments(_5992, '$COMMENT', [";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT', [";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0)))
   Call: (267) [system] '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0)\=@='$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _5978)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _148946))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _148946))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _148946))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _148946))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _148946)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _148946)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _154532))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _154532))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _154532)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _154532)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _154532)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0)))
   Call: (267) [system] '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0)\=@='$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _148946)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _5958))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _5958))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _5958))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _5958))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _5958)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _5958)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _176852))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _176852))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _176852)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _176852)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _176852)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0)))
   Call: (267) [system] '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0)\=@='$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _5958)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0)))
   Call: (261) [system] '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0)\=@='$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _205630, [], _205632)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _205630, [], _205632)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _205630, [], _205632)
   Call: (258) [system] atom('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _205630, [], _205632)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _205630, [], _205632)
   Call: (258) [system] compound('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), _214946, _214948)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT', [";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0])
^  Call: (258) [user] subst_vars([";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0], _216832, [], _205632)
^  Unify: (258) [user] subst_vars([";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0], [";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0], [], [])
   Call: (259) [system] var([";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0])
^  Redo: (258) [user] subst_vars([";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0], _216832, [], _205632)
^  Unify: (258) [user] subst_vars([";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0], [_220568|_220570], [], _205632)
^  Call: (259) [user] subst_vars(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _220568, [], _221508)
^  Unify: (259) [user] subst_vars(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", ";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", [], [])
   Call: (260) [system] var(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();")
^  Redo: (259) [user] subst_vars(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _220568, [], _221508)
^  Unify: (259) [user] subst_vars(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _220568, [], _221508)
   Call: (260) [system] atom(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();")
^  Redo: (259) [user] subst_vars(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _220568, [], _221508)
^  Unify: (259) [user] subst_vars(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _220568, [], _221508)
   Call: (260) [system] compound(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();")
^  Redo: (259) [user] subst_vars(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", _220568, [], _221508)
^  Unify: (259) [user] subst_vars(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", ";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", [], [])
^  Exit: (259) [user] subst_vars(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", ";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", [], [])
^  Call: (259) [user] subst_vars([1372, 0], _220570, [], _205632)
^  Unify: (259) [user] subst_vars([1372, 0], [1372, 0], [], [])
   Call: (260) [system] var([1372, 0])
^  Redo: (259) [user] subst_vars([1372, 0], _220570, [], _205632)
^  Unify: (259) [user] subst_vars([1372, 0], [_236440|_236442], [], _205632)
^  Call: (260) [user] subst_vars(1372, _236440, [], _237380)
^  Unify: (260) [user] subst_vars(1372, 1372, [], [])
   Call: (261) [system] var(1372)
^  Redo: (260) [user] subst_vars(1372, _236440, [], _237380)
^  Unify: (260) [user] subst_vars(1372, _236440, [], _237380)
   Call: (261) [system] atom(1372)
^  Redo: (260) [user] subst_vars(1372, _236440, [], _237380)
^  Unify: (260) [user] subst_vars(1372, _236440, [], _237380)
   Call: (261) [system] compound(1372)
^  Redo: (260) [user] subst_vars(1372, _236440, [], _237380)
^  Unify: (260) [user] subst_vars(1372, 1372, [], [])
^  Exit: (260) [user] subst_vars(1372, 1372, [], [])
^  Call: (260) [user] subst_vars([0], _236442, [], _205632)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _236442, [], _205632)
^  Unify: (260) [user] subst_vars([0], [_252312|_252314], [], _205632)
^  Call: (261) [user] subst_vars(0, _252312, [], _253252)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _252312, [], _253252)
^  Unify: (261) [user] subst_vars(0, _252312, [], _253252)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _252312, [], _253252)
^  Unify: (261) [user] subst_vars(0, _252312, [], _253252)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _252312, [], _253252)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _252314, [], _205632)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _252314, [], _205632)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1372, 0], [1372, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0], [";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0], [], [])
   Call: (258) [system] compound_name_arguments(_205630, '$COMMENT', [";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT', [";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), [], [])
   Call: (257) [system] _275670=metta_file_buffer(+, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let new_state = result.get(0).ok_or(\"error\").unwrap();", 1372, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1373, 0, 49471, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$stream_position'(49471, 1373, 0, 49505)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _328396))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _328396))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _328396)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _328396)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _328396)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _328396)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _334008))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _334008))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _334008))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _334008))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _334008)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _334008)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _339594))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _339594))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _339594)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _339594)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _339594)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _339594)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _339594)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$VAR'(_347054))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _339594)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _339594)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _339594)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _339594)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _339594)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _339594)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0)==[_356334, _356340]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _339594)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _339594)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _339594)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _339594)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _339594)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _339594)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _366536, _366538)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT', [";;        assert_eq!(old_state, new_state);", 1373, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq!(old_state, new_state);", 1373, 0], _370278)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(old_state, new_state);", 1373, 0], _370278)
   Call: (271) [apply] apply:maplist_([";;        assert_eq!(old_state, new_state);", 1373, 0], _370278, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq!(old_state, new_state);", 1373, 0], [_373096|_373098], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq!(old_state, new_state);", _373096)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(old_state, new_state);", _373096)
   Call: (273) [system] var(";;        assert_eq!(old_state, new_state);")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(old_state, new_state);", _373096)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(old_state, new_state);", '$VAR'(_377742))
   Call: (273) [system] atom(";;        assert_eq!(old_state, new_state);")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(old_state, new_state);", _373096)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(old_state, new_state);", _373096)
   Call: (273) [system] ";;        assert_eq!(old_state, new_state);"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(old_state, new_state);", _373096)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(old_state, new_state);", _373096)
   Call: (273) [system] ";;        assert_eq!(old_state, new_state);"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(old_state, new_state);", _373096)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(old_state, new_state);", _373096)
   Call: (273) [system] ";;        assert_eq!(old_state, new_state);"==[_387022, _387028]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(old_state, new_state);", _373096)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(old_state, new_state);", _373096)
   Call: (273) [system] is_list(";;        assert_eq!(old_state, new_state);")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(old_state, new_state);", _373096)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(old_state, new_state);", _373096)
   Call: (273) [system] string(";;        assert_eq!(old_state, new_state);")
   Exit: (273) [system] string(";;        assert_eq!(old_state, new_state);")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(old_state, new_state);", _373096)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(old_state, new_state);", _373096)
   Call: (273) [system] compound(";;        assert_eq!(old_state, new_state);")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(old_state, new_state);", _373096)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(old_state, new_state);", _373096)
^  Call: (273) [user] symbol(";;        assert_eq!(old_state, new_state);")
^  Unify: (273) [user] symbol(";;        assert_eq!(old_state, new_state);")
   Call: (274) [system] atom(";;        assert_eq!(old_state, new_state);")
   Fail: (274) [system] atom(";;        assert_eq!(old_state, new_state);")
^  Fail: (273) [user] symbol(";;        assert_eq!(old_state, new_state);")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(old_state, new_state);", _373096)
   Call: (273) [system] ";;        assert_eq!(old_state, new_state);"=_373096
   Exit: (273) [system] ";;        assert_eq!(old_state, new_state);"=";;        assert_eq!(old_state, new_state);"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq!(old_state, new_state);", ";;        assert_eq!(old_state, new_state);")
   Call: (272) [apply] apply:maplist_([1373, 0], _373098, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1373, 0], [_411094|_411096], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1373, _411094)
^  Unify: (273) [user] mfix_vars1(1373, _411094)
   Call: (274) [system] var(1373)
^  Redo: (273) [user] mfix_vars1(1373, _411094)
^  Unify: (273) [user] mfix_vars1(1373, '$VAR'(_415740))
   Call: (274) [system] atom(1373)
^  Redo: (273) [user] mfix_vars1(1373, _411094)
^  Unify: (273) [user] mfix_vars1(1373, _411094)
   Call: (274) [system] 1373==true
^  Redo: (273) [user] mfix_vars1(1373, _411094)
^  Unify: (273) [user] mfix_vars1(1373, _411094)
   Call: (274) [system] 1373==false
^  Redo: (273) [user] mfix_vars1(1373, _411094)
^  Unify: (273) [user] mfix_vars1(1373, _411094)
   Call: (274) [system] 1373==[_425020, _425026]
^  Redo: (273) [user] mfix_vars1(1373, _411094)
^  Unify: (273) [user] mfix_vars1(1373, _411094)
   Call: (274) [system] is_list(1373)
^  Redo: (273) [user] mfix_vars1(1373, _411094)
^  Unify: (273) [user] mfix_vars1(1373, _411094)
   Call: (274) [system] string(1373)
^  Redo: (273) [user] mfix_vars1(1373, _411094)
^  Unify: (273) [user] mfix_vars1(1373, _411094)
   Call: (274) [system] compound(1373)
^  Redo: (273) [user] mfix_vars1(1373, _411094)
^  Unify: (273) [user] mfix_vars1(1373, _411094)
^  Call: (274) [user] symbol(1373)
^  Unify: (274) [user] symbol(1373)
   Call: (275) [system] atom(1373)
   Fail: (275) [system] atom(1373)
^  Fail: (274) [user] symbol(1373)
^  Redo: (273) [user] mfix_vars1(1373, _411094)
   Call: (274) [system] 1373=_411094
   Exit: (274) [system] 1373=1373
^  Exit: (273) [user] mfix_vars1(1373, 1373)
   Call: (273) [apply] apply:maplist_([0], _411096, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_445420|_445422], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _445420)
^  Unify: (274) [user] mfix_vars1(0, _445420)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _445420)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_450066))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _445420)
^  Unify: (274) [user] mfix_vars1(0, _445420)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _445420)
^  Unify: (274) [user] mfix_vars1(0, _445420)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _445420)
^  Unify: (274) [user] mfix_vars1(0, _445420)
   Call: (275) [system] 0==[_459346, _459352]
^  Redo: (274) [user] mfix_vars1(0, _445420)
^  Unify: (274) [user] mfix_vars1(0, _445420)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _445420)
^  Unify: (274) [user] mfix_vars1(0, _445420)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _445420)
^  Unify: (274) [user] mfix_vars1(0, _445420)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _445420)
^  Unify: (274) [user] mfix_vars1(0, _445420)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _445420)
   Call: (275) [system] 0=_445420
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _445422, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1373, 0], [1373, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq!(old_state, new_state);", 1373, 0], [";;        assert_eq!(old_state, new_state);", 1373, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(old_state, new_state);", 1373, 0], [";;        assert_eq!(old_state, new_state);", 1373, 0])
   Call: (270) [system] compound_name_arguments(_339594, '$COMMENT', [";;        assert_eq!(old_state, new_state);", 1373, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT', [";;        assert_eq!(old_state, new_state);", 1373, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0)\=@='$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _334008)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _495594))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _495594))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _495594))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _495594))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _495594)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _495594)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _501180))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _501180))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _501180)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _501180)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _501180)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0)\=@='$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _495594)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _328396))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _328396))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _328396))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _328396))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _328396)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _328396)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _5992))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _5992))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _5992)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _5992)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _5992)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0)\=@='$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0)\=@='$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _34364, [], _34366)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _34364, [], _34366)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _34364, [], _34366)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _34364, [], _34366)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _34364, [], _34366)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), _43680, _43682)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT', [";;        assert_eq!(old_state, new_state);", 1373, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq!(old_state, new_state);", 1373, 0], _45566, [], _34366)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(old_state, new_state);", 1373, 0], [";;        assert_eq!(old_state, new_state);", 1373, 0], [], [])
   Call: (259) [system] var([";;        assert_eq!(old_state, new_state);", 1373, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq!(old_state, new_state);", 1373, 0], _45566, [], _34366)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(old_state, new_state);", 1373, 0], [_49302|_49304], [], _34366)
^  Call: (259) [user] subst_vars(";;        assert_eq!(old_state, new_state);", _49302, [], _50242)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(old_state, new_state);", ";;        assert_eq!(old_state, new_state);", [], [])
   Call: (260) [system] var(";;        assert_eq!(old_state, new_state);")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(old_state, new_state);", _49302, [], _50242)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(old_state, new_state);", _49302, [], _50242)
   Call: (260) [system] atom(";;        assert_eq!(old_state, new_state);")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(old_state, new_state);", _49302, [], _50242)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(old_state, new_state);", _49302, [], _50242)
   Call: (260) [system] compound(";;        assert_eq!(old_state, new_state);")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(old_state, new_state);", _49302, [], _50242)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(old_state, new_state);", ";;        assert_eq!(old_state, new_state);", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq!(old_state, new_state);", ";;        assert_eq!(old_state, new_state);", [], [])
^  Call: (259) [user] subst_vars([1373, 0], _49304, [], _34366)
^  Unify: (259) [user] subst_vars([1373, 0], [1373, 0], [], [])
   Call: (260) [system] var([1373, 0])
^  Redo: (259) [user] subst_vars([1373, 0], _49304, [], _34366)
^  Unify: (259) [user] subst_vars([1373, 0], [_65174|_65176], [], _34366)
^  Call: (260) [user] subst_vars(1373, _65174, [], _66114)
^  Unify: (260) [user] subst_vars(1373, 1373, [], [])
   Call: (261) [system] var(1373)
^  Redo: (260) [user] subst_vars(1373, _65174, [], _66114)
^  Unify: (260) [user] subst_vars(1373, _65174, [], _66114)
   Call: (261) [system] atom(1373)
^  Redo: (260) [user] subst_vars(1373, _65174, [], _66114)
^  Unify: (260) [user] subst_vars(1373, _65174, [], _66114)
   Call: (261) [system] compound(1373)
^  Redo: (260) [user] subst_vars(1373, _65174, [], _66114)
^  Unify: (260) [user] subst_vars(1373, 1373, [], [])
^  Exit: (260) [user] subst_vars(1373, 1373, [], [])
^  Call: (260) [user] subst_vars([0], _65176, [], _34366)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _65176, [], _34366)
^  Unify: (260) [user] subst_vars([0], [_81046|_81048], [], _34366)
^  Call: (261) [user] subst_vars(0, _81046, [], _81986)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _81046, [], _81986)
^  Unify: (261) [user] subst_vars(0, _81046, [], _81986)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _81046, [], _81986)
^  Unify: (261) [user] subst_vars(0, _81046, [], _81986)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _81046, [], _81986)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _81048, [], _34366)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _81048, [], _34366)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1373, 0], [1373, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq!(old_state, new_state);", 1373, 0], [";;        assert_eq!(old_state, new_state);", 1373, 0], [], [])
   Call: (258) [system] compound_name_arguments(_34364, '$COMMENT', [";;        assert_eq!(old_state, new_state);", 1373, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT', [";;        assert_eq!(old_state, new_state);", 1373, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), [], [])
   Call: (257) [system] _104404=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(old_state, new_state);", 1373, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1374, 0, 49515, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$stream_position'(49515, 1374, 0, 49549)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _157138))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _157138))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _157138)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _157138)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _157138)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _157138)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _162750))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _162750))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _162750))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _162750))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _162750)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _162750)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _168336))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _168336))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _168336)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _168336)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _168336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _168336)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _168336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$VAR'(_175796))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _168336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _168336)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _168336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _168336)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _168336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _168336)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0)==[_185076, _185082]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _168336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _168336)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _168336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _168336)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _168336)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _168336)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _195278, _195280)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT', [";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0], _199020)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0], _199020)
   Call: (271) [apply] apply:maplist_([";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0], _199020, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0], [_201838|_201840], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _201838)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _201838)
   Call: (273) [system] var(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _201838)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", '$VAR'(_206484))
   Call: (273) [system] atom(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _201838)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _201838)
   Call: (273) [system] ";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _201838)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _201838)
   Call: (273) [system] ";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _201838)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _201838)
   Call: (273) [system] ";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));"==[_215764, _215770]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _201838)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _201838)
   Call: (273) [system] is_list(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _201838)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _201838)
   Call: (273) [system] string(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));")
   Exit: (273) [system] string(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _201838)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _201838)
   Call: (273) [system] compound(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _201838)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _201838)
^  Call: (273) [user] symbol(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));")
^  Unify: (273) [user] symbol(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));")
   Call: (274) [system] atom(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));")
   Fail: (274) [system] atom(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));")
^  Fail: (273) [user] symbol(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _201838)
   Call: (273) [system] ";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));"=_201838
   Exit: (273) [system] ";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));"=";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", ";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));")
   Call: (272) [apply] apply:maplist_([1374, 0], _201840, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1374, 0], [_239836|_239838], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1374, _239836)
^  Unify: (273) [user] mfix_vars1(1374, _239836)
   Call: (274) [system] var(1374)
^  Redo: (273) [user] mfix_vars1(1374, _239836)
^  Unify: (273) [user] mfix_vars1(1374, '$VAR'(_244482))
   Call: (274) [system] atom(1374)
^  Redo: (273) [user] mfix_vars1(1374, _239836)
^  Unify: (273) [user] mfix_vars1(1374, _239836)
   Call: (274) [system] 1374==true
^  Redo: (273) [user] mfix_vars1(1374, _239836)
^  Unify: (273) [user] mfix_vars1(1374, _239836)
   Call: (274) [system] 1374==false
^  Redo: (273) [user] mfix_vars1(1374, _239836)
^  Unify: (273) [user] mfix_vars1(1374, _239836)
   Call: (274) [system] 1374==[_253762, _253768]
^  Redo: (273) [user] mfix_vars1(1374, _239836)
^  Unify: (273) [user] mfix_vars1(1374, _239836)
   Call: (274) [system] is_list(1374)
^  Redo: (273) [user] mfix_vars1(1374, _239836)
^  Unify: (273) [user] mfix_vars1(1374, _239836)
   Call: (274) [system] string(1374)
^  Redo: (273) [user] mfix_vars1(1374, _239836)
^  Unify: (273) [user] mfix_vars1(1374, _239836)
   Call: (274) [system] compound(1374)
^  Redo: (273) [user] mfix_vars1(1374, _239836)
^  Unify: (273) [user] mfix_vars1(1374, _239836)
^  Call: (274) [user] symbol(1374)
^  Unify: (274) [user] symbol(1374)
   Call: (275) [system] atom(1374)
   Fail: (275) [system] atom(1374)
^  Fail: (274) [user] symbol(1374)
^  Redo: (273) [user] mfix_vars1(1374, _239836)
   Call: (274) [system] 1374=_239836
   Exit: (274) [system] 1374=1374
^  Exit: (273) [user] mfix_vars1(1374, 1374)
   Call: (273) [apply] apply:maplist_([0], _239838, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_274162|_274164], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _274162)
^  Unify: (274) [user] mfix_vars1(0, _274162)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _274162)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_278808))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _274162)
^  Unify: (274) [user] mfix_vars1(0, _274162)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _274162)
^  Unify: (274) [user] mfix_vars1(0, _274162)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _274162)
^  Unify: (274) [user] mfix_vars1(0, _274162)
   Call: (275) [system] 0==[_288088, _288094]
^  Redo: (274) [user] mfix_vars1(0, _274162)
^  Unify: (274) [user] mfix_vars1(0, _274162)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _274162)
^  Unify: (274) [user] mfix_vars1(0, _274162)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _274162)
^  Unify: (274) [user] mfix_vars1(0, _274162)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _274162)
^  Unify: (274) [user] mfix_vars1(0, _274162)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _274162)
   Call: (275) [system] 0=_274162
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _274164, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1374, 0], [1374, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0], [";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0], [";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0])
   Call: (270) [system] compound_name_arguments(_168336, '$COMMENT', [";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT', [";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0)\=@='$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _162750)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _324336))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _324336))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _324336))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _324336))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _324336)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _324336)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _329922))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _329922))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _329922)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _329922)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _329922)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0)\=@='$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _324336)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _157138))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _157138))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _157138))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _157138))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _157138)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _157138)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _352242))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _352242))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _352242)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _352242)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _352242)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0)\=@='$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _157138)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0)\=@='$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _381020, [], _381022)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _381020, [], _381022)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _381020, [], _381022)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _381020, [], _381022)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _381020, [], _381022)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), _390336, _390338)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT', [";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0], _392222, [], _381022)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0], [";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0], [], [])
   Call: (259) [system] var([";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0], _392222, [], _381022)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0], [_395958|_395960], [], _381022)
^  Call: (259) [user] subst_vars(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _395958, [], _396898)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", ";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", [], [])
   Call: (260) [system] var(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _395958, [], _396898)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _395958, [], _396898)
   Call: (260) [system] atom(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _395958, [], _396898)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _395958, [], _396898)
   Call: (260) [system] compound(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", _395958, [], _396898)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", ";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", ";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", [], [])
^  Call: (259) [user] subst_vars([1374, 0], _395960, [], _381022)
^  Unify: (259) [user] subst_vars([1374, 0], [1374, 0], [], [])
   Call: (260) [system] var([1374, 0])
^  Redo: (259) [user] subst_vars([1374, 0], _395960, [], _381022)
^  Unify: (259) [user] subst_vars([1374, 0], [_411830|_411832], [], _381022)
^  Call: (260) [user] subst_vars(1374, _411830, [], _412770)
^  Unify: (260) [user] subst_vars(1374, 1374, [], [])
   Call: (261) [system] var(1374)
^  Redo: (260) [user] subst_vars(1374, _411830, [], _412770)
^  Unify: (260) [user] subst_vars(1374, _411830, [], _412770)
   Call: (261) [system] atom(1374)
^  Redo: (260) [user] subst_vars(1374, _411830, [], _412770)
^  Unify: (260) [user] subst_vars(1374, _411830, [], _412770)
   Call: (261) [system] compound(1374)
^  Redo: (260) [user] subst_vars(1374, _411830, [], _412770)
^  Unify: (260) [user] subst_vars(1374, 1374, [], [])
^  Exit: (260) [user] subst_vars(1374, 1374, [], [])
^  Call: (260) [user] subst_vars([0], _411832, [], _381022)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _411832, [], _381022)
^  Unify: (260) [user] subst_vars([0], [_427702|_427704], [], _381022)
^  Call: (261) [user] subst_vars(0, _427702, [], _428642)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _427702, [], _428642)
^  Unify: (261) [user] subst_vars(0, _427702, [], _428642)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _427702, [], _428642)
^  Unify: (261) [user] subst_vars(0, _427702, [], _428642)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _427702, [], _428642)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _427704, [], _381022)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _427704, [], _381022)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1374, 0], [1374, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0], [";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0], [], [])
   Call: (258) [system] compound_name_arguments(_381020, '$COMMENT', [";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT', [";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), [], [])
   Call: (257) [system] _451060=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(new_state, &Atom::gnd(StateAtom::new(expr!(\"C\" \"D\"))));", 1374, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1375, 0, 49592, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$stream_position'(49592, 1375, 0, 49626)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _503794))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _503794))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _503794)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _503794)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _503794)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _503794)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _509406))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _509406))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _509406))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _509406))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _509406)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _509406)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _514992))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _514992))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _514992)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _514992)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _514992)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _514992)
   Call: (270) [system] var('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _514992)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$VAR'(_522452))
   Call: (270) [system] atom('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _5994)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _5994)
   Call: (270) [system] '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _5994)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _5994)
   Call: (270) [system] '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _5994)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _5994)
   Call: (270) [system] '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0)==[_13790, _13796]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _5994)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _5994)
   Call: (270) [system] is_list('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _5994)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _5994)
   Call: (270) [system] string('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _5994)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _5994)
   Call: (270) [system] compound('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _23992, _23994)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT', [";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0], _27734)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0], _27734)
   Call: (271) [apply] apply:maplist_([";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0], _27734, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0], [_30552|_30554], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _30552)
^  Unify: (272) [user] mfix_vars1(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _30552)
   Call: (273) [system] var(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);")
^  Redo: (272) [user] mfix_vars1(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _30552)
^  Unify: (272) [user] mfix_vars1(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", '$VAR'(_35198))
   Call: (273) [system] atom(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);")
^  Redo: (272) [user] mfix_vars1(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _30552)
^  Unify: (272) [user] mfix_vars1(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _30552)
   Call: (273) [system] ";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);"==true
^  Redo: (272) [user] mfix_vars1(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _30552)
^  Unify: (272) [user] mfix_vars1(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _30552)
   Call: (273) [system] ";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);"==false
^  Redo: (272) [user] mfix_vars1(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _30552)
^  Unify: (272) [user] mfix_vars1(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _30552)
   Call: (273) [system] ";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);"==[_44478, _44484]
^  Redo: (272) [user] mfix_vars1(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _30552)
^  Unify: (272) [user] mfix_vars1(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _30552)
   Call: (273) [system] is_list(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);")
^  Redo: (272) [user] mfix_vars1(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _30552)
^  Unify: (272) [user] mfix_vars1(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _30552)
   Call: (273) [system] string(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);")
   Exit: (273) [system] string(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _30552)
^  Unify: (272) [user] mfix_vars1(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _30552)
   Call: (273) [system] compound(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);")
^  Redo: (272) [user] mfix_vars1(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _30552)
^  Unify: (272) [user] mfix_vars1(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _30552)
^  Call: (273) [user] symbol(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);")
^  Unify: (273) [user] symbol(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);")
   Call: (274) [system] atom(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);")
   Fail: (274) [system] atom(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);")
^  Fail: (273) [user] symbol(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);")
^  Redo: (272) [user] mfix_vars1(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _30552)
   Call: (273) [system] ";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);"=_30552
   Exit: (273) [system] ";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);"=";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);"
^  Exit: (272) [user] mfix_vars1(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", ";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);")
   Call: (272) [apply] apply:maplist_([1375, 0], _30554, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1375, 0], [_68550|_68552], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1375, _68550)
^  Unify: (273) [user] mfix_vars1(1375, _68550)
   Call: (274) [system] var(1375)
^  Redo: (273) [user] mfix_vars1(1375, _68550)
^  Unify: (273) [user] mfix_vars1(1375, '$VAR'(_73196))
   Call: (274) [system] atom(1375)
^  Redo: (273) [user] mfix_vars1(1375, _68550)
^  Unify: (273) [user] mfix_vars1(1375, _68550)
   Call: (274) [system] 1375==true
^  Redo: (273) [user] mfix_vars1(1375, _68550)
^  Unify: (273) [user] mfix_vars1(1375, _68550)
   Call: (274) [system] 1375==false
^  Redo: (273) [user] mfix_vars1(1375, _68550)
^  Unify: (273) [user] mfix_vars1(1375, _68550)
   Call: (274) [system] 1375==[_82476, _82482]
^  Redo: (273) [user] mfix_vars1(1375, _68550)
^  Unify: (273) [user] mfix_vars1(1375, _68550)
   Call: (274) [system] is_list(1375)
^  Redo: (273) [user] mfix_vars1(1375, _68550)
^  Unify: (273) [user] mfix_vars1(1375, _68550)
   Call: (274) [system] string(1375)
^  Redo: (273) [user] mfix_vars1(1375, _68550)
^  Unify: (273) [user] mfix_vars1(1375, _68550)
   Call: (274) [system] compound(1375)
^  Redo: (273) [user] mfix_vars1(1375, _68550)
^  Unify: (273) [user] mfix_vars1(1375, _68550)
^  Call: (274) [user] symbol(1375)
^  Unify: (274) [user] symbol(1375)
   Call: (275) [system] atom(1375)
   Fail: (275) [system] atom(1375)
^  Fail: (274) [user] symbol(1375)
^  Redo: (273) [user] mfix_vars1(1375, _68550)
   Call: (274) [system] 1375=_68550
   Exit: (274) [system] 1375=1375
^  Exit: (273) [user] mfix_vars1(1375, 1375)
   Call: (273) [apply] apply:maplist_([0], _68552, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_102876|_102878], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _102876)
^  Unify: (274) [user] mfix_vars1(0, _102876)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _102876)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_107522))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _102876)
^  Unify: (274) [user] mfix_vars1(0, _102876)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _102876)
^  Unify: (274) [user] mfix_vars1(0, _102876)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _102876)
^  Unify: (274) [user] mfix_vars1(0, _102876)
   Call: (275) [system] 0==[_116802, _116808]
^  Redo: (274) [user] mfix_vars1(0, _102876)
^  Unify: (274) [user] mfix_vars1(0, _102876)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _102876)
^  Unify: (274) [user] mfix_vars1(0, _102876)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _102876)
^  Unify: (274) [user] mfix_vars1(0, _102876)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _102876)
^  Unify: (274) [user] mfix_vars1(0, _102876)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _102876)
   Call: (275) [system] 0=_102876
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _102878, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1375, 0], [1375, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0], [";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0], [";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0])
   Call: (270) [system] compound_name_arguments(_5994, '$COMMENT', [";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT', [";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0)))
   Call: (267) [system] '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0)\=@='$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _5980)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _153050))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _153050))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _153050))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _153050))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _153050)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _153050)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _158636))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _158636))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _158636)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _158636)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _158636)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0)))
   Call: (267) [system] '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0)\=@='$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _153050)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _5960))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _5960))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _5960))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _5960))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _5960)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _5960)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _180956))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _180956))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _180956)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _180956)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _180956)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0)))
   Call: (267) [system] '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0)\=@='$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _5960)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0)))
   Call: (261) [system] '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0)\=@='$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _209734, [], _209736)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _209734, [], _209736)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _209734, [], _209736)
   Call: (258) [system] atom('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _209734, [], _209736)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _209734, [], _209736)
   Call: (258) [system] compound('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), _219050, _219052)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT', [";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0])
^  Call: (258) [user] subst_vars([";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0], _220936, [], _209736)
^  Unify: (258) [user] subst_vars([";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0], [";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0], [], [])
   Call: (259) [system] var([";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0])
^  Redo: (258) [user] subst_vars([";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0], _220936, [], _209736)
^  Unify: (258) [user] subst_vars([";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0], [_224672|_224674], [], _209736)
^  Call: (259) [user] subst_vars(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _224672, [], _225612)
^  Unify: (259) [user] subst_vars(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", ";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", [], [])
   Call: (260) [system] var(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);")
^  Redo: (259) [user] subst_vars(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _224672, [], _225612)
^  Unify: (259) [user] subst_vars(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _224672, [], _225612)
   Call: (260) [system] atom(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);")
^  Redo: (259) [user] subst_vars(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _224672, [], _225612)
^  Unify: (259) [user] subst_vars(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _224672, [], _225612)
   Call: (260) [system] compound(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);")
^  Redo: (259) [user] subst_vars(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", _224672, [], _225612)
^  Unify: (259) [user] subst_vars(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", ";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", [], [])
^  Exit: (259) [user] subst_vars(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", ";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", [], [])
^  Call: (259) [user] subst_vars([1375, 0], _224674, [], _209736)
^  Unify: (259) [user] subst_vars([1375, 0], [1375, 0], [], [])
   Call: (260) [system] var([1375, 0])
^  Redo: (259) [user] subst_vars([1375, 0], _224674, [], _209736)
^  Unify: (259) [user] subst_vars([1375, 0], [_240544|_240546], [], _209736)
^  Call: (260) [user] subst_vars(1375, _240544, [], _241484)
^  Unify: (260) [user] subst_vars(1375, 1375, [], [])
   Call: (261) [system] var(1375)
^  Redo: (260) [user] subst_vars(1375, _240544, [], _241484)
^  Unify: (260) [user] subst_vars(1375, _240544, [], _241484)
   Call: (261) [system] atom(1375)
^  Redo: (260) [user] subst_vars(1375, _240544, [], _241484)
^  Unify: (260) [user] subst_vars(1375, _240544, [], _241484)
   Call: (261) [system] compound(1375)
^  Redo: (260) [user] subst_vars(1375, _240544, [], _241484)
^  Unify: (260) [user] subst_vars(1375, 1375, [], [])
^  Exit: (260) [user] subst_vars(1375, 1375, [], [])
^  Call: (260) [user] subst_vars([0], _240546, [], _209736)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _240546, [], _209736)
^  Unify: (260) [user] subst_vars([0], [_256416|_256418], [], _209736)
^  Call: (261) [user] subst_vars(0, _256416, [], _257356)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _256416, [], _257356)
^  Unify: (261) [user] subst_vars(0, _256416, [], _257356)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _256416, [], _257356)
^  Unify: (261) [user] subst_vars(0, _256416, [], _257356)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _256416, [], _257356)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _256418, [], _209736)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _256418, [], _209736)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1375, 0], [1375, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0], [";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0], [], [])
   Call: (258) [system] compound_name_arguments(_209734, '$COMMENT', [";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT', [";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), [], [])
   Call: (257) [system] _279774=metta_file_buffer(+, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let result = GetStateOp{}.execute(&mut vec![new_state.clone()]);", 1375, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1376, 0, 49667, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$stream_position'(49667, 1376, 0, 49701)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _332502))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _332502))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _332502)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _332502)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _332502)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _332502)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _338114))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _338114))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _338114))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _338114))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _338114)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _338114)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _343700))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _343700))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _343700)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _343700)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _343700)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _343700)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _343700)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$VAR'(_351160))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _343700)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _343700)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _343700)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _343700)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _343700)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _343700)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0)==[_360440, _360446]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _343700)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _343700)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _343700)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _343700)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _343700)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _343700)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _370642, _370644)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT', [";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0], _374384)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0], _374384)
   Call: (271) [apply] apply:maplist_([";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0], _374384, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0], [_377202|_377204], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _377202)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _377202)
   Call: (273) [system] var(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _377202)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", '$VAR'(_381848))
   Call: (273) [system] atom(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _377202)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _377202)
   Call: (273) [system] ";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _377202)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _377202)
   Call: (273) [system] ";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _377202)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _377202)
   Call: (273) [system] ";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))"==[_391128, _391134]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _377202)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _377202)
   Call: (273) [system] is_list(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _377202)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _377202)
   Call: (273) [system] string(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))")
   Exit: (273) [system] string(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _377202)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _377202)
   Call: (273) [system] compound(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _377202)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _377202)
^  Call: (273) [user] symbol(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))")
^  Unify: (273) [user] symbol(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))")
   Call: (274) [system] atom(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))")
   Fail: (274) [system] atom(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))")
^  Fail: (273) [user] symbol(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _377202)
   Call: (273) [system] ";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))"=_377202
   Exit: (273) [system] ";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))"=";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", ";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))")
   Call: (272) [apply] apply:maplist_([1376, 0], _377204, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1376, 0], [_415200|_415202], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1376, _415200)
^  Unify: (273) [user] mfix_vars1(1376, _415200)
   Call: (274) [system] var(1376)
^  Redo: (273) [user] mfix_vars1(1376, _415200)
^  Unify: (273) [user] mfix_vars1(1376, '$VAR'(_419846))
   Call: (274) [system] atom(1376)
^  Redo: (273) [user] mfix_vars1(1376, _415200)
^  Unify: (273) [user] mfix_vars1(1376, _415200)
   Call: (274) [system] 1376==true
^  Redo: (273) [user] mfix_vars1(1376, _415200)
^  Unify: (273) [user] mfix_vars1(1376, _415200)
   Call: (274) [system] 1376==false
^  Redo: (273) [user] mfix_vars1(1376, _415200)
^  Unify: (273) [user] mfix_vars1(1376, _415200)
   Call: (274) [system] 1376==[_429126, _429132]
^  Redo: (273) [user] mfix_vars1(1376, _415200)
^  Unify: (273) [user] mfix_vars1(1376, _415200)
   Call: (274) [system] is_list(1376)
^  Redo: (273) [user] mfix_vars1(1376, _415200)
^  Unify: (273) [user] mfix_vars1(1376, _415200)
   Call: (274) [system] string(1376)
^  Redo: (273) [user] mfix_vars1(1376, _415200)
^  Unify: (273) [user] mfix_vars1(1376, _415200)
   Call: (274) [system] compound(1376)
^  Redo: (273) [user] mfix_vars1(1376, _415200)
^  Unify: (273) [user] mfix_vars1(1376, _415200)
^  Call: (274) [user] symbol(1376)
^  Unify: (274) [user] symbol(1376)
   Call: (275) [system] atom(1376)
   Fail: (275) [system] atom(1376)
^  Fail: (274) [user] symbol(1376)
^  Redo: (273) [user] mfix_vars1(1376, _415200)
   Call: (274) [system] 1376=_415200
   Exit: (274) [system] 1376=1376
^  Exit: (273) [user] mfix_vars1(1376, 1376)
   Call: (273) [apply] apply:maplist_([0], _415202, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_449526|_449528], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _449526)
^  Unify: (274) [user] mfix_vars1(0, _449526)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _449526)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_454172))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _449526)
^  Unify: (274) [user] mfix_vars1(0, _449526)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _449526)
^  Unify: (274) [user] mfix_vars1(0, _449526)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _449526)
^  Unify: (274) [user] mfix_vars1(0, _449526)
   Call: (275) [system] 0==[_463452, _463458]
^  Redo: (274) [user] mfix_vars1(0, _449526)
^  Unify: (274) [user] mfix_vars1(0, _449526)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _449526)
^  Unify: (274) [user] mfix_vars1(0, _449526)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _449526)
^  Unify: (274) [user] mfix_vars1(0, _449526)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _449526)
^  Unify: (274) [user] mfix_vars1(0, _449526)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _449526)
   Call: (275) [system] 0=_449526
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _449528, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1376, 0], [1376, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0], [";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0], [";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0])
   Call: (270) [system] compound_name_arguments(_343700, '$COMMENT', [";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT', [";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0)\=@='$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _338114)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _499700))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _499700))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _499700))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _499700))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _499700)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _499700)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _505286))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _505286))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _505286)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _505286)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _505286)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0)\=@='$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _499700)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _332502))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _332502))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _5954))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _5954))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _5954)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _5954)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _9582))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _9582))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _9582)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _9582)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _9582)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0)\=@='$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _5954)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0)\=@='$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _38360, [], _38362)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _38360, [], _38362)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _38360, [], _38362)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _38360, [], _38362)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _38360, [], _38362)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), _47676, _47678)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT', [";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0], _49562, [], _38362)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0], [";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0], [], [])
   Call: (259) [system] var([";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0], _49562, [], _38362)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0], [_53298|_53300], [], _38362)
^  Call: (259) [user] subst_vars(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _53298, [], _54238)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", ";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", [], [])
   Call: (260) [system] var(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _53298, [], _54238)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _53298, [], _54238)
   Call: (260) [system] atom(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _53298, [], _54238)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _53298, [], _54238)
   Call: (260) [system] compound(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", _53298, [], _54238)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", ";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", ";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", [], [])
^  Call: (259) [user] subst_vars([1376, 0], _53300, [], _38362)
^  Unify: (259) [user] subst_vars([1376, 0], [1376, 0], [], [])
   Call: (260) [system] var([1376, 0])
^  Redo: (259) [user] subst_vars([1376, 0], _53300, [], _38362)
^  Unify: (259) [user] subst_vars([1376, 0], [_69170|_69172], [], _38362)
^  Call: (260) [user] subst_vars(1376, _69170, [], _70110)
^  Unify: (260) [user] subst_vars(1376, 1376, [], [])
   Call: (261) [system] var(1376)
^  Redo: (260) [user] subst_vars(1376, _69170, [], _70110)
^  Unify: (260) [user] subst_vars(1376, _69170, [], _70110)
   Call: (261) [system] atom(1376)
^  Redo: (260) [user] subst_vars(1376, _69170, [], _70110)
^  Unify: (260) [user] subst_vars(1376, _69170, [], _70110)
   Call: (261) [system] compound(1376)
^  Redo: (260) [user] subst_vars(1376, _69170, [], _70110)
^  Unify: (260) [user] subst_vars(1376, 1376, [], [])
^  Exit: (260) [user] subst_vars(1376, 1376, [], [])
^  Call: (260) [user] subst_vars([0], _69172, [], _38362)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _69172, [], _38362)
^  Unify: (260) [user] subst_vars([0], [_85042|_85044], [], _38362)
^  Call: (261) [user] subst_vars(0, _85042, [], _85982)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _85042, [], _85982)
^  Unify: (261) [user] subst_vars(0, _85042, [], _85982)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _85042, [], _85982)
^  Unify: (261) [user] subst_vars(0, _85042, [], _85982)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _85042, [], _85982)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _85044, [], _38362)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _85044, [], _38362)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1376, 0], [1376, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0], [";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0], [], [])
   Call: (258) [system] compound_name_arguments(_38360, '$COMMENT', [";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT', [";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), [], [])
   Call: (257) [system] _108400=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(result, Ok(vec![expr!(\"C\" \"D\")]))", 1376, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1377, 0, 49722, '$COMMENT'(";;    }", 1377, 0), '$stream_position'(49722, 1377, 0, 49756)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1377, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1377, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    }", 1377, 0), _161118))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1377, 0), _161118))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    }", 1377, 0), _161118)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1377, 0), _161118)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1377, 0), _161118)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1377, 0), _161118)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    }", 1377, 0), _166730))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1377, 0), _166730))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1377, 0), _166730))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1377, 0), _166730))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1377, 0), _166730)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1377, 0), _166730)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    }", 1377, 0), _172316))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1377, 0), _172316))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    }", 1377, 0), _172316)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1377, 0), _172316)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1377, 0), _172316)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1377, 0), _172316)
   Call: (270) [system] var('$COMMENT'(";;    }", 1377, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1377, 0), _172316)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1377, 0), '$VAR'(_179776))
   Call: (270) [system] atom('$COMMENT'(";;    }", 1377, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1377, 0), _172316)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1377, 0), _172316)
   Call: (270) [system] '$COMMENT'(";;    }", 1377, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1377, 0), _172316)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1377, 0), _172316)
   Call: (270) [system] '$COMMENT'(";;    }", 1377, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1377, 0), _172316)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1377, 0), _172316)
   Call: (270) [system] '$COMMENT'(";;    }", 1377, 0)==[_189056, _189062]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1377, 0), _172316)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1377, 0), _172316)
   Call: (270) [system] is_list('$COMMENT'(";;    }", 1377, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1377, 0), _172316)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1377, 0), _172316)
   Call: (270) [system] string('$COMMENT'(";;    }", 1377, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1377, 0), _172316)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1377, 0), _172316)
   Call: (270) [system] compound('$COMMENT'(";;    }", 1377, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    }", 1377, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1377, 0), _199258, _199260)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1377, 0), '$COMMENT', [";;    }", 1377, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    }", 1377, 0], _203000)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1377, 0], _203000)
   Call: (271) [apply] apply:maplist_([";;    }", 1377, 0], _203000, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    }", 1377, 0], [_205818|_205820], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    }", _205818)
^  Unify: (272) [user] mfix_vars1(";;    }", _205818)
   Call: (273) [system] var(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _205818)
^  Unify: (272) [user] mfix_vars1(";;    }", '$VAR'(_210464))
   Call: (273) [system] atom(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _205818)
^  Unify: (272) [user] mfix_vars1(";;    }", _205818)
   Call: (273) [system] ";;    }"==true
^  Redo: (272) [user] mfix_vars1(";;    }", _205818)
^  Unify: (272) [user] mfix_vars1(";;    }", _205818)
   Call: (273) [system] ";;    }"==false
^  Redo: (272) [user] mfix_vars1(";;    }", _205818)
^  Unify: (272) [user] mfix_vars1(";;    }", _205818)
   Call: (273) [system] ";;    }"==[_219744, _219750]
^  Redo: (272) [user] mfix_vars1(";;    }", _205818)
^  Unify: (272) [user] mfix_vars1(";;    }", _205818)
   Call: (273) [system] is_list(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _205818)
^  Unify: (272) [user] mfix_vars1(";;    }", _205818)
   Call: (273) [system] string(";;    }")
   Exit: (273) [system] string(";;    }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    }", _205818)
^  Unify: (272) [user] mfix_vars1(";;    }", _205818)
   Call: (273) [system] compound(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _205818)
^  Unify: (272) [user] mfix_vars1(";;    }", _205818)
^  Call: (273) [user] symbol(";;    }")
^  Unify: (273) [user] symbol(";;    }")
   Call: (274) [system] atom(";;    }")
   Fail: (274) [system] atom(";;    }")
^  Fail: (273) [user] symbol(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _205818)
   Call: (273) [system] ";;    }"=_205818
   Exit: (273) [system] ";;    }"=";;    }"
^  Exit: (272) [user] mfix_vars1(";;    }", ";;    }")
   Call: (272) [apply] apply:maplist_([1377, 0], _205820, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1377, 0], [_243816|_243818], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1377, _243816)
^  Unify: (273) [user] mfix_vars1(1377, _243816)
   Call: (274) [system] var(1377)
^  Redo: (273) [user] mfix_vars1(1377, _243816)
^  Unify: (273) [user] mfix_vars1(1377, '$VAR'(_248462))
   Call: (274) [system] atom(1377)
^  Redo: (273) [user] mfix_vars1(1377, _243816)
^  Unify: (273) [user] mfix_vars1(1377, _243816)
   Call: (274) [system] 1377==true
^  Redo: (273) [user] mfix_vars1(1377, _243816)
^  Unify: (273) [user] mfix_vars1(1377, _243816)
   Call: (274) [system] 1377==false
^  Redo: (273) [user] mfix_vars1(1377, _243816)
^  Unify: (273) [user] mfix_vars1(1377, _243816)
   Call: (274) [system] 1377==[_257742, _257748]
^  Redo: (273) [user] mfix_vars1(1377, _243816)
^  Unify: (273) [user] mfix_vars1(1377, _243816)
   Call: (274) [system] is_list(1377)
^  Redo: (273) [user] mfix_vars1(1377, _243816)
^  Unify: (273) [user] mfix_vars1(1377, _243816)
   Call: (274) [system] string(1377)
^  Redo: (273) [user] mfix_vars1(1377, _243816)
^  Unify: (273) [user] mfix_vars1(1377, _243816)
   Call: (274) [system] compound(1377)
^  Redo: (273) [user] mfix_vars1(1377, _243816)
^  Unify: (273) [user] mfix_vars1(1377, _243816)
^  Call: (274) [user] symbol(1377)
^  Unify: (274) [user] symbol(1377)
   Call: (275) [system] atom(1377)
   Fail: (275) [system] atom(1377)
^  Fail: (274) [user] symbol(1377)
^  Redo: (273) [user] mfix_vars1(1377, _243816)
   Call: (274) [system] 1377=_243816
   Exit: (274) [system] 1377=1377
^  Exit: (273) [user] mfix_vars1(1377, 1377)
   Call: (273) [apply] apply:maplist_([0], _243818, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_278142|_278144], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _278142)
^  Unify: (274) [user] mfix_vars1(0, _278142)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _278142)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_282788))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _278142)
^  Unify: (274) [user] mfix_vars1(0, _278142)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _278142)
^  Unify: (274) [user] mfix_vars1(0, _278142)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _278142)
^  Unify: (274) [user] mfix_vars1(0, _278142)
   Call: (275) [system] 0==[_292068, _292074]
^  Redo: (274) [user] mfix_vars1(0, _278142)
^  Unify: (274) [user] mfix_vars1(0, _278142)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _278142)
^  Unify: (274) [user] mfix_vars1(0, _278142)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _278142)
^  Unify: (274) [user] mfix_vars1(0, _278142)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _278142)
^  Unify: (274) [user] mfix_vars1(0, _278142)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _278142)
   Call: (275) [system] 0=_278142
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _278144, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1377, 0], [1377, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    }", 1377, 0], [";;    }", 1377, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1377, 0], [";;    }", 1377, 0])
   Call: (270) [system] compound_name_arguments(_172316, '$COMMENT', [";;    }", 1377, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1377, 0), '$COMMENT', [";;    }", 1377, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1377, 0)\=@='$COMMENT'(";;    }", 1377, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1377, 0), _166730)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    }", 1377, 0), _328316))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1377, 0), _328316))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1377, 0), _328316))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1377, 0), _328316))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1377, 0), _328316)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1377, 0), _328316)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    }", 1377, 0), _333902))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1377, 0), _333902))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    }", 1377, 0), _333902)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1377, 0), _333902)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    }", 1377, 0), _333902)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1377, 0)\=@='$COMMENT'(";;    }", 1377, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1377, 0), _328316)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    }", 1377, 0), _161118))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1377, 0), _161118))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1377, 0), _161118))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1377, 0), _161118))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1377, 0), _161118)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1377, 0), _161118)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    }", 1377, 0), _356222))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1377, 0), _356222))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    }", 1377, 0), _356222)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1377, 0), _356222)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    }", 1377, 0), _356222)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1377, 0)\=@='$COMMENT'(";;    }", 1377, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1377, 0), _161118)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0)))
   Call: (261) [system] '$COMMENT'(";;    }", 1377, 0)\=@='$COMMENT'(";;    }", 1377, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1377, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1377, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1377, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1377, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1377, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    }", 1377, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    }", 1377, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    }", 1377, 0), _385000, [], _385002)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    }", 1377, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1377, 0), _385000, [], _385002)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1377, 0), _385000, [], _385002)
   Call: (258) [system] atom('$COMMENT'(";;    }", 1377, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1377, 0), _385000, [], _385002)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1377, 0), _385000, [], _385002)
   Call: (258) [system] compound('$COMMENT'(";;    }", 1377, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    }", 1377, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1377, 0), _394316, _394318)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1377, 0), '$COMMENT', [";;    }", 1377, 0])
^  Call: (258) [user] subst_vars([";;    }", 1377, 0], _396202, [], _385002)
^  Unify: (258) [user] subst_vars([";;    }", 1377, 0], [";;    }", 1377, 0], [], [])
   Call: (259) [system] var([";;    }", 1377, 0])
^  Redo: (258) [user] subst_vars([";;    }", 1377, 0], _396202, [], _385002)
^  Unify: (258) [user] subst_vars([";;    }", 1377, 0], [_399938|_399940], [], _385002)
^  Call: (259) [user] subst_vars(";;    }", _399938, [], _400878)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
   Call: (260) [system] var(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _399938, [], _400878)
^  Unify: (259) [user] subst_vars(";;    }", _399938, [], _400878)
   Call: (260) [system] atom(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _399938, [], _400878)
^  Unify: (259) [user] subst_vars(";;    }", _399938, [], _400878)
   Call: (260) [system] compound(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _399938, [], _400878)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Exit: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Call: (259) [user] subst_vars([1377, 0], _399940, [], _385002)
^  Unify: (259) [user] subst_vars([1377, 0], [1377, 0], [], [])
   Call: (260) [system] var([1377, 0])
^  Redo: (259) [user] subst_vars([1377, 0], _399940, [], _385002)
^  Unify: (259) [user] subst_vars([1377, 0], [_415810|_415812], [], _385002)
^  Call: (260) [user] subst_vars(1377, _415810, [], _416750)
^  Unify: (260) [user] subst_vars(1377, 1377, [], [])
   Call: (261) [system] var(1377)
^  Redo: (260) [user] subst_vars(1377, _415810, [], _416750)
^  Unify: (260) [user] subst_vars(1377, _415810, [], _416750)
   Call: (261) [system] atom(1377)
^  Redo: (260) [user] subst_vars(1377, _415810, [], _416750)
^  Unify: (260) [user] subst_vars(1377, _415810, [], _416750)
   Call: (261) [system] compound(1377)
^  Redo: (260) [user] subst_vars(1377, _415810, [], _416750)
^  Unify: (260) [user] subst_vars(1377, 1377, [], [])
^  Exit: (260) [user] subst_vars(1377, 1377, [], [])
^  Call: (260) [user] subst_vars([0], _415812, [], _385002)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _415812, [], _385002)
^  Unify: (260) [user] subst_vars([0], [_431682|_431684], [], _385002)
^  Call: (261) [user] subst_vars(0, _431682, [], _432622)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _431682, [], _432622)
^  Unify: (261) [user] subst_vars(0, _431682, [], _432622)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _431682, [], _432622)
^  Unify: (261) [user] subst_vars(0, _431682, [], _432622)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _431682, [], _432622)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _431684, [], _385002)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _431684, [], _385002)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1377, 0], [1377, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    }", 1377, 0], [";;    }", 1377, 0], [], [])
   Call: (258) [system] compound_name_arguments(_385000, '$COMMENT', [";;    }", 1377, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1377, 0), '$COMMENT', [";;    }", 1377, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    }", 1377, 0), '$COMMENT'(";;    }", 1377, 0), [], [])
   Call: (257) [system] _455040=metta_file_buffer(+, '$COMMENT'(";;    }", 1377, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    }", 1377, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    }", 1377, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1377, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1377, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1377, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1377, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1377, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1377, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1378, 0, 49730, '$COMMENT'(";; Converted:", 1378, 0), '$stream_position'(49730, 1378, 0, 49764)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1378, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1378, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1378, 0), _507758))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1378, 0), _507758))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1378, 0), _507758)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1378, 0), _507758)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1378, 0), _507758)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1378, 0), _507758)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1378, 0), _513370))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1378, 0), _513370))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1378, 0), _513370))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1378, 0), _513370))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1378, 0), _513370)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1378, 0), _513370)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1378, 0), _518956))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1378, 0), _518956))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1378, 0), _518956)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1378, 0), _518956)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1378, 0), _518956)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1378, 0), _5978)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1378, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1378, 0), _5978)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1378, 0), '$VAR'(_8480))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1378, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1378, 0), _5978)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1378, 0), _5978)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1378, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1378, 0), _5978)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1378, 0), _5978)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1378, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1378, 0), _5978)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1378, 0), _5978)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1378, 0)==[_17760, _17766]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1378, 0), _5978)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1378, 0), _5978)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1378, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1378, 0), _5978)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1378, 0), _5978)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1378, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1378, 0), _5978)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1378, 0), _5978)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1378, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1378, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1378, 0), _27962, _27964)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1378, 0), '$COMMENT', [";; Converted:", 1378, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1378, 0], _31704)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1378, 0], _31704)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1378, 0], _31704, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1378, 0], [_34522|_34524], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _34522)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _34522)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _34522)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_39168))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _34522)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _34522)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _34522)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _34522)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _34522)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _34522)
   Call: (273) [system] ";; Converted:"==[_48448, _48454]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _34522)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _34522)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _34522)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _34522)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _34522)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _34522)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _34522)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _34522)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _34522)
   Call: (273) [system] ";; Converted:"=_34522
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1378, 0], _34524, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1378, 0], [_72520|_72522], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1378, _72520)
^  Unify: (273) [user] mfix_vars1(1378, _72520)
   Call: (274) [system] var(1378)
^  Redo: (273) [user] mfix_vars1(1378, _72520)
^  Unify: (273) [user] mfix_vars1(1378, '$VAR'(_77166))
   Call: (274) [system] atom(1378)
^  Redo: (273) [user] mfix_vars1(1378, _72520)
^  Unify: (273) [user] mfix_vars1(1378, _72520)
   Call: (274) [system] 1378==true
^  Redo: (273) [user] mfix_vars1(1378, _72520)
^  Unify: (273) [user] mfix_vars1(1378, _72520)
   Call: (274) [system] 1378==false
^  Redo: (273) [user] mfix_vars1(1378, _72520)
^  Unify: (273) [user] mfix_vars1(1378, _72520)
   Call: (274) [system] 1378==[_86446, _86452]
^  Redo: (273) [user] mfix_vars1(1378, _72520)
^  Unify: (273) [user] mfix_vars1(1378, _72520)
   Call: (274) [system] is_list(1378)
^  Redo: (273) [user] mfix_vars1(1378, _72520)
^  Unify: (273) [user] mfix_vars1(1378, _72520)
   Call: (274) [system] string(1378)
^  Redo: (273) [user] mfix_vars1(1378, _72520)
^  Unify: (273) [user] mfix_vars1(1378, _72520)
   Call: (274) [system] compound(1378)
^  Redo: (273) [user] mfix_vars1(1378, _72520)
^  Unify: (273) [user] mfix_vars1(1378, _72520)
^  Call: (274) [user] symbol(1378)
^  Unify: (274) [user] symbol(1378)
   Call: (275) [system] atom(1378)
   Fail: (275) [system] atom(1378)
^  Fail: (274) [user] symbol(1378)
^  Redo: (273) [user] mfix_vars1(1378, _72520)
   Call: (274) [system] 1378=_72520
   Exit: (274) [system] 1378=1378
^  Exit: (273) [user] mfix_vars1(1378, 1378)
   Call: (273) [apply] apply:maplist_([0], _72522, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_106846|_106848], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _106846)
^  Unify: (274) [user] mfix_vars1(0, _106846)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _106846)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_111492))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _106846)
^  Unify: (274) [user] mfix_vars1(0, _106846)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _106846)
^  Unify: (274) [user] mfix_vars1(0, _106846)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _106846)
^  Unify: (274) [user] mfix_vars1(0, _106846)
   Call: (275) [system] 0==[_120772, _120778]
^  Redo: (274) [user] mfix_vars1(0, _106846)
^  Unify: (274) [user] mfix_vars1(0, _106846)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _106846)
^  Unify: (274) [user] mfix_vars1(0, _106846)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _106846)
^  Unify: (274) [user] mfix_vars1(0, _106846)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _106846)
^  Unify: (274) [user] mfix_vars1(0, _106846)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _106846)
   Call: (275) [system] 0=_106846
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _106848, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1378, 0], [1378, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1378, 0], [";; Converted:", 1378, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1378, 0], [";; Converted:", 1378, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";; Converted:", 1378, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1378, 0), '$COMMENT', [";; Converted:", 1378, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1378, 0)\=@='$COMMENT'(";; Converted:", 1378, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1378, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1378, 0), _157020))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1378, 0), _157020))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1378, 0), _157020))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1378, 0), _157020))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1378, 0), _157020)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1378, 0), _157020)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1378, 0), _162606))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1378, 0), _162606))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1378, 0), _162606)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1378, 0), _162606)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1378, 0), _162606)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1378, 0)\=@='$COMMENT'(";; Converted:", 1378, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1378, 0), _157020)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1378, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1378, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1378, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1378, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1378, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1378, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1378, 0), _184926))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1378, 0), _184926))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1378, 0), _184926)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1378, 0), _184926)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1378, 0), _184926)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1378, 0)\=@='$COMMENT'(";; Converted:", 1378, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1378, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1378, 0)\=@='$COMMENT'(";; Converted:", 1378, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1378, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1378, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1378, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1378, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1378, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1378, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1378, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1378, 0), _213704, [], _213706)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1378, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1378, 0), _213704, [], _213706)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1378, 0), _213704, [], _213706)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1378, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1378, 0), _213704, [], _213706)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1378, 0), _213704, [], _213706)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1378, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1378, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1378, 0), _223020, _223022)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1378, 0), '$COMMENT', [";; Converted:", 1378, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1378, 0], _224906, [], _213706)
^  Unify: (258) [user] subst_vars([";; Converted:", 1378, 0], [";; Converted:", 1378, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1378, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1378, 0], _224906, [], _213706)
^  Unify: (258) [user] subst_vars([";; Converted:", 1378, 0], [_228642|_228644], [], _213706)
^  Call: (259) [user] subst_vars(";; Converted:", _228642, [], _229582)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _228642, [], _229582)
^  Unify: (259) [user] subst_vars(";; Converted:", _228642, [], _229582)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _228642, [], _229582)
^  Unify: (259) [user] subst_vars(";; Converted:", _228642, [], _229582)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _228642, [], _229582)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1378, 0], _228644, [], _213706)
^  Unify: (259) [user] subst_vars([1378, 0], [1378, 0], [], [])
   Call: (260) [system] var([1378, 0])
^  Redo: (259) [user] subst_vars([1378, 0], _228644, [], _213706)
^  Unify: (259) [user] subst_vars([1378, 0], [_244514|_244516], [], _213706)
^  Call: (260) [user] subst_vars(1378, _244514, [], _245454)
^  Unify: (260) [user] subst_vars(1378, 1378, [], [])
   Call: (261) [system] var(1378)
^  Redo: (260) [user] subst_vars(1378, _244514, [], _245454)
^  Unify: (260) [user] subst_vars(1378, _244514, [], _245454)
   Call: (261) [system] atom(1378)
^  Redo: (260) [user] subst_vars(1378, _244514, [], _245454)
^  Unify: (260) [user] subst_vars(1378, _244514, [], _245454)
   Call: (261) [system] compound(1378)
^  Redo: (260) [user] subst_vars(1378, _244514, [], _245454)
^  Unify: (260) [user] subst_vars(1378, 1378, [], [])
^  Exit: (260) [user] subst_vars(1378, 1378, [], [])
^  Call: (260) [user] subst_vars([0], _244516, [], _213706)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _244516, [], _213706)
^  Unify: (260) [user] subst_vars([0], [_260386|_260388], [], _213706)
^  Call: (261) [user] subst_vars(0, _260386, [], _261326)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _260386, [], _261326)
^  Unify: (261) [user] subst_vars(0, _260386, [], _261326)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _260386, [], _261326)
^  Unify: (261) [user] subst_vars(0, _260386, [], _261326)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _260386, [], _261326)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _260388, [], _213706)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _260388, [], _213706)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1378, 0], [1378, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1378, 0], [";; Converted:", 1378, 0], [], [])
   Call: (258) [system] compound_name_arguments(_213704, '$COMMENT', [";; Converted:", 1378, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1378, 0), '$COMMENT', [";; Converted:", 1378, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1378, 0), '$COMMENT'(";; Converted:", 1378, 0), [], [])
   Call: (257) [system] _283744=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1378, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1378, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1378, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1378, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1378, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1378, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1378, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1378, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1378, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1387, 0, 49978, '$COMMENT'(";; Original:", 1387, 0), '$stream_position'(49978, 1387, 0, 50012)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1387, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1387, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1387, 0), _336462))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1387, 0), _336462))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1387, 0), _336462)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1387, 0), _336462)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1387, 0), _336462)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1387, 0), _336462)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1387, 0), _342074))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1387, 0), _342074))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1387, 0), _342074))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1387, 0), _342074))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1387, 0), _342074)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1387, 0), _342074)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1387, 0), _347660))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1387, 0), _347660))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1387, 0), _347660)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1387, 0), _347660)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1387, 0), _347660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1387, 0), _347660)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1387, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1387, 0), _347660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1387, 0), '$VAR'(_355120))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1387, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1387, 0), _347660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1387, 0), _347660)
   Call: (270) [system] '$COMMENT'(";; Original:", 1387, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1387, 0), _347660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1387, 0), _347660)
   Call: (270) [system] '$COMMENT'(";; Original:", 1387, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1387, 0), _347660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1387, 0), _347660)
   Call: (270) [system] '$COMMENT'(";; Original:", 1387, 0)==[_364400, _364406]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1387, 0), _347660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1387, 0), _347660)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1387, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1387, 0), _347660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1387, 0), _347660)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1387, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1387, 0), _347660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1387, 0), _347660)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1387, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1387, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1387, 0), _374602, _374604)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1387, 0), '$COMMENT', [";; Original:", 1387, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1387, 0], _378344)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1387, 0], _378344)
   Call: (271) [apply] apply:maplist_([";; Original:", 1387, 0], _378344, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1387, 0], [_381162|_381164], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _381162)
^  Unify: (272) [user] mfix_vars1(";; Original:", _381162)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _381162)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_385808))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _381162)
^  Unify: (272) [user] mfix_vars1(";; Original:", _381162)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _381162)
^  Unify: (272) [user] mfix_vars1(";; Original:", _381162)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _381162)
^  Unify: (272) [user] mfix_vars1(";; Original:", _381162)
   Call: (273) [system] ";; Original:"==[_395088, _395094]
^  Redo: (272) [user] mfix_vars1(";; Original:", _381162)
^  Unify: (272) [user] mfix_vars1(";; Original:", _381162)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _381162)
^  Unify: (272) [user] mfix_vars1(";; Original:", _381162)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _381162)
^  Unify: (272) [user] mfix_vars1(";; Original:", _381162)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _381162)
^  Unify: (272) [user] mfix_vars1(";; Original:", _381162)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _381162)
   Call: (273) [system] ";; Original:"=_381162
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1387, 0], _381164, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1387, 0], [_419160|_419162], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1387, _419160)
^  Unify: (273) [user] mfix_vars1(1387, _419160)
   Call: (274) [system] var(1387)
^  Redo: (273) [user] mfix_vars1(1387, _419160)
^  Unify: (273) [user] mfix_vars1(1387, '$VAR'(_423806))
   Call: (274) [system] atom(1387)
^  Redo: (273) [user] mfix_vars1(1387, _419160)
^  Unify: (273) [user] mfix_vars1(1387, _419160)
   Call: (274) [system] 1387==true
^  Redo: (273) [user] mfix_vars1(1387, _419160)
^  Unify: (273) [user] mfix_vars1(1387, _419160)
   Call: (274) [system] 1387==false
^  Redo: (273) [user] mfix_vars1(1387, _419160)
^  Unify: (273) [user] mfix_vars1(1387, _419160)
   Call: (274) [system] 1387==[_433086, _433092]
^  Redo: (273) [user] mfix_vars1(1387, _419160)
^  Unify: (273) [user] mfix_vars1(1387, _419160)
   Call: (274) [system] is_list(1387)
^  Redo: (273) [user] mfix_vars1(1387, _419160)
^  Unify: (273) [user] mfix_vars1(1387, _419160)
   Call: (274) [system] string(1387)
^  Redo: (273) [user] mfix_vars1(1387, _419160)
^  Unify: (273) [user] mfix_vars1(1387, _419160)
   Call: (274) [system] compound(1387)
^  Redo: (273) [user] mfix_vars1(1387, _419160)
^  Unify: (273) [user] mfix_vars1(1387, _419160)
^  Call: (274) [user] symbol(1387)
^  Unify: (274) [user] symbol(1387)
   Call: (275) [system] atom(1387)
   Fail: (275) [system] atom(1387)
^  Fail: (274) [user] symbol(1387)
^  Redo: (273) [user] mfix_vars1(1387, _419160)
   Call: (274) [system] 1387=_419160
   Exit: (274) [system] 1387=1387
^  Exit: (273) [user] mfix_vars1(1387, 1387)
   Call: (273) [apply] apply:maplist_([0], _419162, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_453486|_453488], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _453486)
^  Unify: (274) [user] mfix_vars1(0, _453486)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _453486)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_458132))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _453486)
^  Unify: (274) [user] mfix_vars1(0, _453486)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _453486)
^  Unify: (274) [user] mfix_vars1(0, _453486)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _453486)
^  Unify: (274) [user] mfix_vars1(0, _453486)
   Call: (275) [system] 0==[_467412, _467418]
^  Redo: (274) [user] mfix_vars1(0, _453486)
^  Unify: (274) [user] mfix_vars1(0, _453486)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _453486)
^  Unify: (274) [user] mfix_vars1(0, _453486)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _453486)
^  Unify: (274) [user] mfix_vars1(0, _453486)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _453486)
^  Unify: (274) [user] mfix_vars1(0, _453486)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _453486)
   Call: (275) [system] 0=_453486
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _453488, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1387, 0], [1387, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1387, 0], [";; Original:", 1387, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1387, 0], [";; Original:", 1387, 0])
   Call: (270) [system] compound_name_arguments(_347660, '$COMMENT', [";; Original:", 1387, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1387, 0), '$COMMENT', [";; Original:", 1387, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1387, 0)\=@='$COMMENT'(";; Original:", 1387, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1387, 0), _342074)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1387, 0), _503660))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1387, 0), _503660))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1387, 0), _503660))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1387, 0), _503660))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1387, 0), _503660)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1387, 0), _503660)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1387, 0), _509246))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1387, 0), _509246))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1387, 0), _509246)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1387, 0), _509246)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1387, 0), _509246)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1387, 0)\=@='$COMMENT'(";; Original:", 1387, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1387, 0), _503660)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1387, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1387, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1387, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1387, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1387, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1387, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1387, 0), _13388))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1387, 0), _13388))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1387, 0), _13388)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1387, 0), _13388)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1387, 0), _13388)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1387, 0)\=@='$COMMENT'(";; Original:", 1387, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1387, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1387, 0)\=@='$COMMENT'(";; Original:", 1387, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1387, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1387, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1387, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1387, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1387, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1387, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1387, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1387, 0), _42166, [], _42168)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1387, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1387, 0), _42166, [], _42168)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1387, 0), _42166, [], _42168)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1387, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1387, 0), _42166, [], _42168)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1387, 0), _42166, [], _42168)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1387, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1387, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1387, 0), _51482, _51484)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1387, 0), '$COMMENT', [";; Original:", 1387, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1387, 0], _53368, [], _42168)
^  Unify: (258) [user] subst_vars([";; Original:", 1387, 0], [";; Original:", 1387, 0], [], [])
   Call: (259) [system] var([";; Original:", 1387, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1387, 0], _53368, [], _42168)
^  Unify: (258) [user] subst_vars([";; Original:", 1387, 0], [_57104|_57106], [], _42168)
^  Call: (259) [user] subst_vars(";; Original:", _57104, [], _58044)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _57104, [], _58044)
^  Unify: (259) [user] subst_vars(";; Original:", _57104, [], _58044)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _57104, [], _58044)
^  Unify: (259) [user] subst_vars(";; Original:", _57104, [], _58044)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _57104, [], _58044)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1387, 0], _57106, [], _42168)
^  Unify: (259) [user] subst_vars([1387, 0], [1387, 0], [], [])
   Call: (260) [system] var([1387, 0])
^  Redo: (259) [user] subst_vars([1387, 0], _57106, [], _42168)
^  Unify: (259) [user] subst_vars([1387, 0], [_72976|_72978], [], _42168)
^  Call: (260) [user] subst_vars(1387, _72976, [], _73916)
^  Unify: (260) [user] subst_vars(1387, 1387, [], [])
   Call: (261) [system] var(1387)
^  Redo: (260) [user] subst_vars(1387, _72976, [], _73916)
^  Unify: (260) [user] subst_vars(1387, _72976, [], _73916)
   Call: (261) [system] atom(1387)
^  Redo: (260) [user] subst_vars(1387, _72976, [], _73916)
^  Unify: (260) [user] subst_vars(1387, _72976, [], _73916)
   Call: (261) [system] compound(1387)
^  Redo: (260) [user] subst_vars(1387, _72976, [], _73916)
^  Unify: (260) [user] subst_vars(1387, 1387, [], [])
^  Exit: (260) [user] subst_vars(1387, 1387, [], [])
^  Call: (260) [user] subst_vars([0], _72978, [], _42168)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _72978, [], _42168)
^  Unify: (260) [user] subst_vars([0], [_88848|_88850], [], _42168)
^  Call: (261) [user] subst_vars(0, _88848, [], _89788)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _88848, [], _89788)
^  Unify: (261) [user] subst_vars(0, _88848, [], _89788)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _88848, [], _89788)
^  Unify: (261) [user] subst_vars(0, _88848, [], _89788)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _88848, [], _89788)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _88850, [], _42168)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _88850, [], _42168)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1387, 0], [1387, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1387, 0], [";; Original:", 1387, 0], [], [])
   Call: (258) [system] compound_name_arguments(_42166, '$COMMENT', [";; Original:", 1387, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1387, 0), '$COMMENT', [";; Original:", 1387, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1387, 0), '$COMMENT'(";; Original:", 1387, 0), [], [])
   Call: (257) [system] _112206=metta_file_buffer(+, '$COMMENT'(";; Original:", 1387, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1387, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1387, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1387, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1387, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1387, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1387, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1387, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1387, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1388, 0, 49991, '$COMMENT'(";;    #[test]", 1388, 0), '$stream_position'(49991, 1388, 0, 50025)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1388, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1388, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1388, 0), _164924))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1388, 0), _164924))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1388, 0), _164924)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1388, 0), _164924)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1388, 0), _164924)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1388, 0), _164924)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1388, 0), _170536))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1388, 0), _170536))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1388, 0), _170536))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1388, 0), _170536))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1388, 0), _170536)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1388, 0), _170536)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    #[test]", 1388, 0), _176122))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1388, 0), _176122))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    #[test]", 1388, 0), _176122)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1388, 0), _176122)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1388, 0), _176122)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1388, 0), _176122)
   Call: (270) [system] var('$COMMENT'(";;    #[test]", 1388, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1388, 0), _176122)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1388, 0), '$VAR'(_183582))
   Call: (270) [system] atom('$COMMENT'(";;    #[test]", 1388, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1388, 0), _176122)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1388, 0), _176122)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1388, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1388, 0), _176122)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1388, 0), _176122)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1388, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1388, 0), _176122)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1388, 0), _176122)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1388, 0)==[_192862, _192868]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1388, 0), _176122)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1388, 0), _176122)
   Call: (270) [system] is_list('$COMMENT'(";;    #[test]", 1388, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1388, 0), _176122)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1388, 0), _176122)
   Call: (270) [system] string('$COMMENT'(";;    #[test]", 1388, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1388, 0), _176122)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1388, 0), _176122)
   Call: (270) [system] compound('$COMMENT'(";;    #[test]", 1388, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    #[test]", 1388, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1388, 0), _203064, _203066)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT', [";;    #[test]", 1388, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    #[test]", 1388, 0], _206806)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1388, 0], _206806)
   Call: (271) [apply] apply:maplist_([";;    #[test]", 1388, 0], _206806, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    #[test]", 1388, 0], [_209624|_209626], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    #[test]", _209624)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _209624)
   Call: (273) [system] var(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _209624)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", '$VAR'(_214270))
   Call: (273) [system] atom(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _209624)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _209624)
   Call: (273) [system] ";;    #[test]"==true
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _209624)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _209624)
   Call: (273) [system] ";;    #[test]"==false
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _209624)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _209624)
   Call: (273) [system] ";;    #[test]"==[_223550, _223556]
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _209624)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _209624)
   Call: (273) [system] is_list(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _209624)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _209624)
   Call: (273) [system] string(";;    #[test]")
   Exit: (273) [system] string(";;    #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _209624)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _209624)
   Call: (273) [system] compound(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _209624)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _209624)
^  Call: (273) [user] symbol(";;    #[test]")
^  Unify: (273) [user] symbol(";;    #[test]")
   Call: (274) [system] atom(";;    #[test]")
   Fail: (274) [system] atom(";;    #[test]")
^  Fail: (273) [user] symbol(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _209624)
   Call: (273) [system] ";;    #[test]"=_209624
   Exit: (273) [system] ";;    #[test]"=";;    #[test]"
^  Exit: (272) [user] mfix_vars1(";;    #[test]", ";;    #[test]")
   Call: (272) [apply] apply:maplist_([1388, 0], _209626, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1388, 0], [_247622|_247624], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1388, _247622)
^  Unify: (273) [user] mfix_vars1(1388, _247622)
   Call: (274) [system] var(1388)
^  Redo: (273) [user] mfix_vars1(1388, _247622)
^  Unify: (273) [user] mfix_vars1(1388, '$VAR'(_252268))
   Call: (274) [system] atom(1388)
^  Redo: (273) [user] mfix_vars1(1388, _247622)
^  Unify: (273) [user] mfix_vars1(1388, _247622)
   Call: (274) [system] 1388==true
^  Redo: (273) [user] mfix_vars1(1388, _247622)
^  Unify: (273) [user] mfix_vars1(1388, _247622)
   Call: (274) [system] 1388==false
^  Redo: (273) [user] mfix_vars1(1388, _247622)
^  Unify: (273) [user] mfix_vars1(1388, _247622)
   Call: (274) [system] 1388==[_261548, _261554]
^  Redo: (273) [user] mfix_vars1(1388, _247622)
^  Unify: (273) [user] mfix_vars1(1388, _247622)
   Call: (274) [system] is_list(1388)
^  Redo: (273) [user] mfix_vars1(1388, _247622)
^  Unify: (273) [user] mfix_vars1(1388, _247622)
   Call: (274) [system] string(1388)
^  Redo: (273) [user] mfix_vars1(1388, _247622)
^  Unify: (273) [user] mfix_vars1(1388, _247622)
   Call: (274) [system] compound(1388)
^  Redo: (273) [user] mfix_vars1(1388, _247622)
^  Unify: (273) [user] mfix_vars1(1388, _247622)
^  Call: (274) [user] symbol(1388)
^  Unify: (274) [user] symbol(1388)
   Call: (275) [system] atom(1388)
   Fail: (275) [system] atom(1388)
^  Fail: (274) [user] symbol(1388)
^  Redo: (273) [user] mfix_vars1(1388, _247622)
   Call: (274) [system] 1388=_247622
   Exit: (274) [system] 1388=1388
^  Exit: (273) [user] mfix_vars1(1388, 1388)
   Call: (273) [apply] apply:maplist_([0], _247624, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_281948|_281950], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _281948)
^  Unify: (274) [user] mfix_vars1(0, _281948)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _281948)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_286594))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _281948)
^  Unify: (274) [user] mfix_vars1(0, _281948)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _281948)
^  Unify: (274) [user] mfix_vars1(0, _281948)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _281948)
^  Unify: (274) [user] mfix_vars1(0, _281948)
   Call: (275) [system] 0==[_295874, _295880]
^  Redo: (274) [user] mfix_vars1(0, _281948)
^  Unify: (274) [user] mfix_vars1(0, _281948)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _281948)
^  Unify: (274) [user] mfix_vars1(0, _281948)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _281948)
^  Unify: (274) [user] mfix_vars1(0, _281948)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _281948)
^  Unify: (274) [user] mfix_vars1(0, _281948)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _281948)
   Call: (275) [system] 0=_281948
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _281950, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1388, 0], [1388, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    #[test]", 1388, 0], [";;    #[test]", 1388, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1388, 0], [";;    #[test]", 1388, 0])
   Call: (270) [system] compound_name_arguments(_176122, '$COMMENT', [";;    #[test]", 1388, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT', [";;    #[test]", 1388, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1388, 0)\=@='$COMMENT'(";;    #[test]", 1388, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1388, 0), _170536)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    #[test]", 1388, 0), _332122))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1388, 0), _332122))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1388, 0), _332122))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1388, 0), _332122))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1388, 0), _332122)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1388, 0), _332122)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    #[test]", 1388, 0), _337708))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1388, 0), _337708))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    #[test]", 1388, 0), _337708)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1388, 0), _337708)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1388, 0), _337708)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1388, 0)\=@='$COMMENT'(";;    #[test]", 1388, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1388, 0), _332122)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    #[test]", 1388, 0), _164924))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1388, 0), _164924))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1388, 0), _164924))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1388, 0), _164924))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1388, 0), _164924)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1388, 0), _164924)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    #[test]", 1388, 0), _360028))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1388, 0), _360028))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    #[test]", 1388, 0), _360028)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1388, 0), _360028)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1388, 0), _360028)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1388, 0)\=@='$COMMENT'(";;    #[test]", 1388, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1388, 0), _164924)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0)))
   Call: (261) [system] '$COMMENT'(";;    #[test]", 1388, 0)\=@='$COMMENT'(";;    #[test]", 1388, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1388, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1388, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1388, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1388, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1388, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1388, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1388, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1388, 0), _388806, [], _388808)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    #[test]", 1388, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1388, 0), _388806, [], _388808)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1388, 0), _388806, [], _388808)
   Call: (258) [system] atom('$COMMENT'(";;    #[test]", 1388, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1388, 0), _388806, [], _388808)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1388, 0), _388806, [], _388808)
   Call: (258) [system] compound('$COMMENT'(";;    #[test]", 1388, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    #[test]", 1388, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1388, 0), _398122, _398124)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT', [";;    #[test]", 1388, 0])
^  Call: (258) [user] subst_vars([";;    #[test]", 1388, 0], _400008, [], _388808)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1388, 0], [";;    #[test]", 1388, 0], [], [])
   Call: (259) [system] var([";;    #[test]", 1388, 0])
^  Redo: (258) [user] subst_vars([";;    #[test]", 1388, 0], _400008, [], _388808)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1388, 0], [_403744|_403746], [], _388808)
^  Call: (259) [user] subst_vars(";;    #[test]", _403744, [], _404684)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
   Call: (260) [system] var(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _403744, [], _404684)
^  Unify: (259) [user] subst_vars(";;    #[test]", _403744, [], _404684)
   Call: (260) [system] atom(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _403744, [], _404684)
^  Unify: (259) [user] subst_vars(";;    #[test]", _403744, [], _404684)
   Call: (260) [system] compound(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _403744, [], _404684)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Exit: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Call: (259) [user] subst_vars([1388, 0], _403746, [], _388808)
^  Unify: (259) [user] subst_vars([1388, 0], [1388, 0], [], [])
   Call: (260) [system] var([1388, 0])
^  Redo: (259) [user] subst_vars([1388, 0], _403746, [], _388808)
^  Unify: (259) [user] subst_vars([1388, 0], [_419616|_419618], [], _388808)
^  Call: (260) [user] subst_vars(1388, _419616, [], _420556)
^  Unify: (260) [user] subst_vars(1388, 1388, [], [])
   Call: (261) [system] var(1388)
^  Redo: (260) [user] subst_vars(1388, _419616, [], _420556)
^  Unify: (260) [user] subst_vars(1388, _419616, [], _420556)
   Call: (261) [system] atom(1388)
^  Redo: (260) [user] subst_vars(1388, _419616, [], _420556)
^  Unify: (260) [user] subst_vars(1388, _419616, [], _420556)
   Call: (261) [system] compound(1388)
^  Redo: (260) [user] subst_vars(1388, _419616, [], _420556)
^  Unify: (260) [user] subst_vars(1388, 1388, [], [])
^  Exit: (260) [user] subst_vars(1388, 1388, [], [])
^  Call: (260) [user] subst_vars([0], _419618, [], _388808)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _419618, [], _388808)
^  Unify: (260) [user] subst_vars([0], [_435488|_435490], [], _388808)
^  Call: (261) [user] subst_vars(0, _435488, [], _436428)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _435488, [], _436428)
^  Unify: (261) [user] subst_vars(0, _435488, [], _436428)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _435488, [], _436428)
^  Unify: (261) [user] subst_vars(0, _435488, [], _436428)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _435488, [], _436428)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _435490, [], _388808)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _435490, [], _388808)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1388, 0], [1388, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    #[test]", 1388, 0], [";;    #[test]", 1388, 0], [], [])
   Call: (258) [system] compound_name_arguments(_388806, '$COMMENT', [";;    #[test]", 1388, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT', [";;    #[test]", 1388, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1388, 0), '$COMMENT'(";;    #[test]", 1388, 0), [], [])
   Call: (257) [system] _458846=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1388, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1388, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1388, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1388, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1388, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1388, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1388, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1388, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1388, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1389, 0, 50005, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$stream_position'(50005, 1389, 0, 50039)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _511574))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _511574))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _511574)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _511574)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _511574)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _511574)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _517186))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _517186))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _517186))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _517186))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _517186)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _517186)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _522772))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5988))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5988)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5988)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5988)
   Call: (270) [system] var('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$VAR'(_12296))
   Call: (270) [system] atom('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5988)
   Call: (270) [system] '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5988)
   Call: (270) [system] '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5988)
   Call: (270) [system] '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0)==[_21576, _21582]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5988)
   Call: (270) [system] is_list('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5988)
   Call: (270) [system] string('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5988)
   Call: (270) [system] compound('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _31778, _31780)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT', [";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0], _35520)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0], _35520)
   Call: (271) [apply] apply:maplist_([";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0], _35520, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0], [_38338|_38340], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _38338)
^  Unify: (272) [user] mfix_vars1(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _38338)
   Call: (273) [system] var(";;    fn test_stdlib_uses_rust_grounded_tokens() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _38338)
^  Unify: (272) [user] mfix_vars1(";;    fn test_stdlib_uses_rust_grounded_tokens() {", '$VAR'(_42984))
   Call: (273) [system] atom(";;    fn test_stdlib_uses_rust_grounded_tokens() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _38338)
^  Unify: (272) [user] mfix_vars1(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _38338)
   Call: (273) [system] ";;    fn test_stdlib_uses_rust_grounded_tokens() {"==true
^  Redo: (272) [user] mfix_vars1(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _38338)
^  Unify: (272) [user] mfix_vars1(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _38338)
   Call: (273) [system] ";;    fn test_stdlib_uses_rust_grounded_tokens() {"==false
^  Redo: (272) [user] mfix_vars1(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _38338)
^  Unify: (272) [user] mfix_vars1(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _38338)
   Call: (273) [system] ";;    fn test_stdlib_uses_rust_grounded_tokens() {"==[_52264, _52270]
^  Redo: (272) [user] mfix_vars1(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _38338)
^  Unify: (272) [user] mfix_vars1(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _38338)
   Call: (273) [system] is_list(";;    fn test_stdlib_uses_rust_grounded_tokens() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _38338)
^  Unify: (272) [user] mfix_vars1(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _38338)
   Call: (273) [system] string(";;    fn test_stdlib_uses_rust_grounded_tokens() {")
   Exit: (273) [system] string(";;    fn test_stdlib_uses_rust_grounded_tokens() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _38338)
^  Unify: (272) [user] mfix_vars1(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _38338)
   Call: (273) [system] compound(";;    fn test_stdlib_uses_rust_grounded_tokens() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _38338)
^  Unify: (272) [user] mfix_vars1(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _38338)
^  Call: (273) [user] symbol(";;    fn test_stdlib_uses_rust_grounded_tokens() {")
^  Unify: (273) [user] symbol(";;    fn test_stdlib_uses_rust_grounded_tokens() {")
   Call: (274) [system] atom(";;    fn test_stdlib_uses_rust_grounded_tokens() {")
   Fail: (274) [system] atom(";;    fn test_stdlib_uses_rust_grounded_tokens() {")
^  Fail: (273) [user] symbol(";;    fn test_stdlib_uses_rust_grounded_tokens() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _38338)
   Call: (273) [system] ";;    fn test_stdlib_uses_rust_grounded_tokens() {"=_38338
   Exit: (273) [system] ";;    fn test_stdlib_uses_rust_grounded_tokens() {"=";;    fn test_stdlib_uses_rust_grounded_tokens() {"
^  Exit: (272) [user] mfix_vars1(";;    fn test_stdlib_uses_rust_grounded_tokens() {", ";;    fn test_stdlib_uses_rust_grounded_tokens() {")
   Call: (272) [apply] apply:maplist_([1389, 0], _38340, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1389, 0], [_76336|_76338], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1389, _76336)
^  Unify: (273) [user] mfix_vars1(1389, _76336)
   Call: (274) [system] var(1389)
^  Redo: (273) [user] mfix_vars1(1389, _76336)
^  Unify: (273) [user] mfix_vars1(1389, '$VAR'(_80982))
   Call: (274) [system] atom(1389)
^  Redo: (273) [user] mfix_vars1(1389, _76336)
^  Unify: (273) [user] mfix_vars1(1389, _76336)
   Call: (274) [system] 1389==true
^  Redo: (273) [user] mfix_vars1(1389, _76336)
^  Unify: (273) [user] mfix_vars1(1389, _76336)
   Call: (274) [system] 1389==false
^  Redo: (273) [user] mfix_vars1(1389, _76336)
^  Unify: (273) [user] mfix_vars1(1389, _76336)
   Call: (274) [system] 1389==[_90262, _90268]
^  Redo: (273) [user] mfix_vars1(1389, _76336)
^  Unify: (273) [user] mfix_vars1(1389, _76336)
   Call: (274) [system] is_list(1389)
^  Redo: (273) [user] mfix_vars1(1389, _76336)
^  Unify: (273) [user] mfix_vars1(1389, _76336)
   Call: (274) [system] string(1389)
^  Redo: (273) [user] mfix_vars1(1389, _76336)
^  Unify: (273) [user] mfix_vars1(1389, _76336)
   Call: (274) [system] compound(1389)
^  Redo: (273) [user] mfix_vars1(1389, _76336)
^  Unify: (273) [user] mfix_vars1(1389, _76336)
^  Call: (274) [user] symbol(1389)
^  Unify: (274) [user] symbol(1389)
   Call: (275) [system] atom(1389)
   Fail: (275) [system] atom(1389)
^  Fail: (274) [user] symbol(1389)
^  Redo: (273) [user] mfix_vars1(1389, _76336)
   Call: (274) [system] 1389=_76336
   Exit: (274) [system] 1389=1389
^  Exit: (273) [user] mfix_vars1(1389, 1389)
   Call: (273) [apply] apply:maplist_([0], _76338, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_110662|_110664], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _110662)
^  Unify: (274) [user] mfix_vars1(0, _110662)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _110662)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_115308))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _110662)
^  Unify: (274) [user] mfix_vars1(0, _110662)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _110662)
^  Unify: (274) [user] mfix_vars1(0, _110662)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _110662)
^  Unify: (274) [user] mfix_vars1(0, _110662)
   Call: (275) [system] 0==[_124588, _124594]
^  Redo: (274) [user] mfix_vars1(0, _110662)
^  Unify: (274) [user] mfix_vars1(0, _110662)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _110662)
^  Unify: (274) [user] mfix_vars1(0, _110662)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _110662)
^  Unify: (274) [user] mfix_vars1(0, _110662)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _110662)
^  Unify: (274) [user] mfix_vars1(0, _110662)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _110662)
   Call: (275) [system] 0=_110662
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _110664, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1389, 0], [1389, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0], [";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0], [";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0])
   Call: (270) [system] compound_name_arguments(_5988, '$COMMENT', [";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT', [";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0)\=@='$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5974)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _160836))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _160836))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _160836))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _160836))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _160836)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _160836)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _166422))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _166422))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _166422)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _166422)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _166422)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0)\=@='$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _160836)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5954))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5954))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5954))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5954))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5954)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5954)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _188742))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _188742))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _188742)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _188742)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _188742)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0)\=@='$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5954)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0)))
   Call: (261) [system] '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0)\=@='$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _217520, [], _217522)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _217520, [], _217522)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _217520, [], _217522)
   Call: (258) [system] atom('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _217520, [], _217522)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _217520, [], _217522)
   Call: (258) [system] compound('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), _226836, _226838)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT', [";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0])
^  Call: (258) [user] subst_vars([";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0], _228722, [], _217522)
^  Unify: (258) [user] subst_vars([";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0], [";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0], [], [])
   Call: (259) [system] var([";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0])
^  Redo: (258) [user] subst_vars([";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0], _228722, [], _217522)
^  Unify: (258) [user] subst_vars([";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0], [_232458|_232460], [], _217522)
^  Call: (259) [user] subst_vars(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _232458, [], _233398)
^  Unify: (259) [user] subst_vars(";;    fn test_stdlib_uses_rust_grounded_tokens() {", ";;    fn test_stdlib_uses_rust_grounded_tokens() {", [], [])
   Call: (260) [system] var(";;    fn test_stdlib_uses_rust_grounded_tokens() {")
^  Redo: (259) [user] subst_vars(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _232458, [], _233398)
^  Unify: (259) [user] subst_vars(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _232458, [], _233398)
   Call: (260) [system] atom(";;    fn test_stdlib_uses_rust_grounded_tokens() {")
^  Redo: (259) [user] subst_vars(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _232458, [], _233398)
^  Unify: (259) [user] subst_vars(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _232458, [], _233398)
   Call: (260) [system] compound(";;    fn test_stdlib_uses_rust_grounded_tokens() {")
^  Redo: (259) [user] subst_vars(";;    fn test_stdlib_uses_rust_grounded_tokens() {", _232458, [], _233398)
^  Unify: (259) [user] subst_vars(";;    fn test_stdlib_uses_rust_grounded_tokens() {", ";;    fn test_stdlib_uses_rust_grounded_tokens() {", [], [])
^  Exit: (259) [user] subst_vars(";;    fn test_stdlib_uses_rust_grounded_tokens() {", ";;    fn test_stdlib_uses_rust_grounded_tokens() {", [], [])
^  Call: (259) [user] subst_vars([1389, 0], _232460, [], _217522)
^  Unify: (259) [user] subst_vars([1389, 0], [1389, 0], [], [])
   Call: (260) [system] var([1389, 0])
^  Redo: (259) [user] subst_vars([1389, 0], _232460, [], _217522)
^  Unify: (259) [user] subst_vars([1389, 0], [_248330|_248332], [], _217522)
^  Call: (260) [user] subst_vars(1389, _248330, [], _249270)
^  Unify: (260) [user] subst_vars(1389, 1389, [], [])
   Call: (261) [system] var(1389)
^  Redo: (260) [user] subst_vars(1389, _248330, [], _249270)
^  Unify: (260) [user] subst_vars(1389, _248330, [], _249270)
   Call: (261) [system] atom(1389)
^  Redo: (260) [user] subst_vars(1389, _248330, [], _249270)
^  Unify: (260) [user] subst_vars(1389, _248330, [], _249270)
   Call: (261) [system] compound(1389)
^  Redo: (260) [user] subst_vars(1389, _248330, [], _249270)
^  Unify: (260) [user] subst_vars(1389, 1389, [], [])
^  Exit: (260) [user] subst_vars(1389, 1389, [], [])
^  Call: (260) [user] subst_vars([0], _248332, [], _217522)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _248332, [], _217522)
^  Unify: (260) [user] subst_vars([0], [_264202|_264204], [], _217522)
^  Call: (261) [user] subst_vars(0, _264202, [], _265142)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _264202, [], _265142)
^  Unify: (261) [user] subst_vars(0, _264202, [], _265142)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _264202, [], _265142)
^  Unify: (261) [user] subst_vars(0, _264202, [], _265142)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _264202, [], _265142)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _264204, [], _217522)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _264204, [], _217522)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1389, 0], [1389, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0], [";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0], [], [])
   Call: (258) [system] compound_name_arguments(_217520, '$COMMENT', [";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT', [";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), [], [])
   Call: (257) [system] _287560=metta_file_buffer(+, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn test_stdlib_uses_rust_grounded_tokens() {", 1389, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1390, 0, 50056, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$stream_position'(50056, 1390, 0, 50090)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _340298))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _340298))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _340298)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _340298)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _340298)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _340298)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _345910))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _345910))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _345910))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _345910))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _345910)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _345910)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _351496))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _351496))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _351496)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _351496)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _351496)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _351496)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _351496)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$VAR'(_358956))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _351496)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _351496)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _351496)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _351496)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _351496)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _351496)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0)==[_368236, _368242]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _351496)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _351496)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _351496)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _351496)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _351496)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _351496)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _378438, _378440)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT', [";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0], _382180)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0], _382180)
   Call: (271) [apply] apply:maplist_([";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0], _382180, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0], [_384998|_385000], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _384998)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _384998)
   Call: (273) [system] var(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _384998)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", '$VAR'(_389644))
   Call: (273) [system] atom(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _384998)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _384998)
   Call: (273) [system] ";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _384998)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _384998)
   Call: (273) [system] ";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _384998)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _384998)
   Call: (273) [system] ";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));"==[_398924, _398930]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _384998)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _384998)
   Call: (273) [system] is_list(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _384998)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _384998)
   Call: (273) [system] string(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));")
   Exit: (273) [system] string(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _384998)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _384998)
   Call: (273) [system] compound(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _384998)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _384998)
^  Call: (273) [user] symbol(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));")
^  Unify: (273) [user] symbol(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));")
   Call: (274) [system] atom(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));")
   Fail: (274) [system] atom(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));")
^  Fail: (273) [user] symbol(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _384998)
   Call: (273) [system] ";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));"=_384998
   Exit: (273) [system] ";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));"=";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", ";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));")
   Call: (272) [apply] apply:maplist_([1390, 0], _385000, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1390, 0], [_422996|_422998], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1390, _422996)
^  Unify: (273) [user] mfix_vars1(1390, _422996)
   Call: (274) [system] var(1390)
^  Redo: (273) [user] mfix_vars1(1390, _422996)
^  Unify: (273) [user] mfix_vars1(1390, '$VAR'(_427642))
   Call: (274) [system] atom(1390)
^  Redo: (273) [user] mfix_vars1(1390, _422996)
^  Unify: (273) [user] mfix_vars1(1390, _422996)
   Call: (274) [system] 1390==true
^  Redo: (273) [user] mfix_vars1(1390, _422996)
^  Unify: (273) [user] mfix_vars1(1390, _422996)
   Call: (274) [system] 1390==false
^  Redo: (273) [user] mfix_vars1(1390, _422996)
^  Unify: (273) [user] mfix_vars1(1390, _422996)
   Call: (274) [system] 1390==[_436922, _436928]
^  Redo: (273) [user] mfix_vars1(1390, _422996)
^  Unify: (273) [user] mfix_vars1(1390, _422996)
   Call: (274) [system] is_list(1390)
^  Redo: (273) [user] mfix_vars1(1390, _422996)
^  Unify: (273) [user] mfix_vars1(1390, _422996)
   Call: (274) [system] string(1390)
^  Redo: (273) [user] mfix_vars1(1390, _422996)
^  Unify: (273) [user] mfix_vars1(1390, _422996)
   Call: (274) [system] compound(1390)
^  Redo: (273) [user] mfix_vars1(1390, _422996)
^  Unify: (273) [user] mfix_vars1(1390, _422996)
^  Call: (274) [user] symbol(1390)
^  Unify: (274) [user] symbol(1390)
   Call: (275) [system] atom(1390)
   Fail: (275) [system] atom(1390)
^  Fail: (274) [user] symbol(1390)
^  Redo: (273) [user] mfix_vars1(1390, _422996)
   Call: (274) [system] 1390=_422996
   Exit: (274) [system] 1390=1390
^  Exit: (273) [user] mfix_vars1(1390, 1390)
   Call: (273) [apply] apply:maplist_([0], _422998, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_457322|_457324], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _457322)
^  Unify: (274) [user] mfix_vars1(0, _457322)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _457322)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_461968))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _457322)
^  Unify: (274) [user] mfix_vars1(0, _457322)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _457322)
^  Unify: (274) [user] mfix_vars1(0, _457322)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _457322)
^  Unify: (274) [user] mfix_vars1(0, _457322)
   Call: (275) [system] 0==[_471248, _471254]
^  Redo: (274) [user] mfix_vars1(0, _457322)
^  Unify: (274) [user] mfix_vars1(0, _457322)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _457322)
^  Unify: (274) [user] mfix_vars1(0, _457322)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _457322)
^  Unify: (274) [user] mfix_vars1(0, _457322)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _457322)
^  Unify: (274) [user] mfix_vars1(0, _457322)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _457322)
   Call: (275) [system] 0=_457322
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _457324, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1390, 0], [1390, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0], [";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0], [";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0])
   Call: (270) [system] compound_name_arguments(_351496, '$COMMENT', [";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT', [";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0)\=@='$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _345910)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _507496))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _507496))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _507496))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _507496))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _507496)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _507496)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _513082))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _513082))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _513082)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _513082)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _513082)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0)\=@='$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _5986)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _5964))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _5964))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _5964))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _5964))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _5964)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _5964)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _17528))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _17528))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _17528)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _17528)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _17528)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0)\=@='$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _5964)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0)\=@='$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _46306, [], _46308)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _46306, [], _46308)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _46306, [], _46308)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _46306, [], _46308)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _46306, [], _46308)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), _55622, _55624)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT', [";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0], _57508, [], _46308)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0], [";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0], [], [])
   Call: (259) [system] var([";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0], _57508, [], _46308)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0], [_61244|_61246], [], _46308)
^  Call: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _61244, [], _62184)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", ";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", [], [])
   Call: (260) [system] var(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _61244, [], _62184)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _61244, [], _62184)
   Call: (260) [system] atom(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _61244, [], _62184)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _61244, [], _62184)
   Call: (260) [system] compound(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", _61244, [], _62184)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", ";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", ";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", [], [])
^  Call: (259) [user] subst_vars([1390, 0], _61246, [], _46308)
^  Unify: (259) [user] subst_vars([1390, 0], [1390, 0], [], [])
   Call: (260) [system] var([1390, 0])
^  Redo: (259) [user] subst_vars([1390, 0], _61246, [], _46308)
^  Unify: (259) [user] subst_vars([1390, 0], [_77116|_77118], [], _46308)
^  Call: (260) [user] subst_vars(1390, _77116, [], _78056)
^  Unify: (260) [user] subst_vars(1390, 1390, [], [])
   Call: (261) [system] var(1390)
^  Redo: (260) [user] subst_vars(1390, _77116, [], _78056)
^  Unify: (260) [user] subst_vars(1390, _77116, [], _78056)
   Call: (261) [system] atom(1390)
^  Redo: (260) [user] subst_vars(1390, _77116, [], _78056)
^  Unify: (260) [user] subst_vars(1390, _77116, [], _78056)
   Call: (261) [system] compound(1390)
^  Redo: (260) [user] subst_vars(1390, _77116, [], _78056)
^  Unify: (260) [user] subst_vars(1390, 1390, [], [])
^  Exit: (260) [user] subst_vars(1390, 1390, [], [])
^  Call: (260) [user] subst_vars([0], _77118, [], _46308)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _77118, [], _46308)
^  Unify: (260) [user] subst_vars([0], [_92988|_92990], [], _46308)
^  Call: (261) [user] subst_vars(0, _92988, [], _93928)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _92988, [], _93928)
^  Unify: (261) [user] subst_vars(0, _92988, [], _93928)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _92988, [], _93928)
^  Unify: (261) [user] subst_vars(0, _92988, [], _93928)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _92988, [], _93928)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _92990, [], _46308)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _92990, [], _46308)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1390, 0], [1390, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0], [";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0], [], [])
   Call: (258) [system] compound_name_arguments(_46306, '$COMMENT', [";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT', [";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), [], [])
   Call: (257) [system] _116346=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(if True ok nok)\"), Ok(vec![vec![Atom::sym(\"ok\")]]));", 1390, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1391, 0, 50145, '$COMMENT'(";;    }", 1391, 0), '$stream_position'(50145, 1391, 0, 50179)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1391, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1391, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    }", 1391, 0), _169064))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1391, 0), _169064))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    }", 1391, 0), _169064)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1391, 0), _169064)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1391, 0), _169064)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1391, 0), _169064)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    }", 1391, 0), _174676))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1391, 0), _174676))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1391, 0), _174676))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1391, 0), _174676))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1391, 0), _174676)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1391, 0), _174676)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    }", 1391, 0), _180262))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1391, 0), _180262))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    }", 1391, 0), _180262)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1391, 0), _180262)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1391, 0), _180262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1391, 0), _180262)
   Call: (270) [system] var('$COMMENT'(";;    }", 1391, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1391, 0), _180262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1391, 0), '$VAR'(_187722))
   Call: (270) [system] atom('$COMMENT'(";;    }", 1391, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1391, 0), _180262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1391, 0), _180262)
   Call: (270) [system] '$COMMENT'(";;    }", 1391, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1391, 0), _180262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1391, 0), _180262)
   Call: (270) [system] '$COMMENT'(";;    }", 1391, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1391, 0), _180262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1391, 0), _180262)
   Call: (270) [system] '$COMMENT'(";;    }", 1391, 0)==[_197002, _197008]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1391, 0), _180262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1391, 0), _180262)
   Call: (270) [system] is_list('$COMMENT'(";;    }", 1391, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1391, 0), _180262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1391, 0), _180262)
   Call: (270) [system] string('$COMMENT'(";;    }", 1391, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1391, 0), _180262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1391, 0), _180262)
   Call: (270) [system] compound('$COMMENT'(";;    }", 1391, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    }", 1391, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1391, 0), _207204, _207206)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1391, 0), '$COMMENT', [";;    }", 1391, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    }", 1391, 0], _210946)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1391, 0], _210946)
   Call: (271) [apply] apply:maplist_([";;    }", 1391, 0], _210946, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    }", 1391, 0], [_213764|_213766], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    }", _213764)
^  Unify: (272) [user] mfix_vars1(";;    }", _213764)
   Call: (273) [system] var(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _213764)
^  Unify: (272) [user] mfix_vars1(";;    }", '$VAR'(_218410))
   Call: (273) [system] atom(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _213764)
^  Unify: (272) [user] mfix_vars1(";;    }", _213764)
   Call: (273) [system] ";;    }"==true
^  Redo: (272) [user] mfix_vars1(";;    }", _213764)
^  Unify: (272) [user] mfix_vars1(";;    }", _213764)
   Call: (273) [system] ";;    }"==false
^  Redo: (272) [user] mfix_vars1(";;    }", _213764)
^  Unify: (272) [user] mfix_vars1(";;    }", _213764)
   Call: (273) [system] ";;    }"==[_227690, _227696]
^  Redo: (272) [user] mfix_vars1(";;    }", _213764)
^  Unify: (272) [user] mfix_vars1(";;    }", _213764)
   Call: (273) [system] is_list(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _213764)
^  Unify: (272) [user] mfix_vars1(";;    }", _213764)
   Call: (273) [system] string(";;    }")
   Exit: (273) [system] string(";;    }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    }", _213764)
^  Unify: (272) [user] mfix_vars1(";;    }", _213764)
   Call: (273) [system] compound(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _213764)
^  Unify: (272) [user] mfix_vars1(";;    }", _213764)
^  Call: (273) [user] symbol(";;    }")
^  Unify: (273) [user] symbol(";;    }")
   Call: (274) [system] atom(";;    }")
   Fail: (274) [system] atom(";;    }")
^  Fail: (273) [user] symbol(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _213764)
   Call: (273) [system] ";;    }"=_213764
   Exit: (273) [system] ";;    }"=";;    }"
^  Exit: (272) [user] mfix_vars1(";;    }", ";;    }")
   Call: (272) [apply] apply:maplist_([1391, 0], _213766, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1391, 0], [_251762|_251764], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1391, _251762)
^  Unify: (273) [user] mfix_vars1(1391, _251762)
   Call: (274) [system] var(1391)
^  Redo: (273) [user] mfix_vars1(1391, _251762)
^  Unify: (273) [user] mfix_vars1(1391, '$VAR'(_256408))
   Call: (274) [system] atom(1391)
^  Redo: (273) [user] mfix_vars1(1391, _251762)
^  Unify: (273) [user] mfix_vars1(1391, _251762)
   Call: (274) [system] 1391==true
^  Redo: (273) [user] mfix_vars1(1391, _251762)
^  Unify: (273) [user] mfix_vars1(1391, _251762)
   Call: (274) [system] 1391==false
^  Redo: (273) [user] mfix_vars1(1391, _251762)
^  Unify: (273) [user] mfix_vars1(1391, _251762)
   Call: (274) [system] 1391==[_265688, _265694]
^  Redo: (273) [user] mfix_vars1(1391, _251762)
^  Unify: (273) [user] mfix_vars1(1391, _251762)
   Call: (274) [system] is_list(1391)
^  Redo: (273) [user] mfix_vars1(1391, _251762)
^  Unify: (273) [user] mfix_vars1(1391, _251762)
   Call: (274) [system] string(1391)
^  Redo: (273) [user] mfix_vars1(1391, _251762)
^  Unify: (273) [user] mfix_vars1(1391, _251762)
   Call: (274) [system] compound(1391)
^  Redo: (273) [user] mfix_vars1(1391, _251762)
^  Unify: (273) [user] mfix_vars1(1391, _251762)
^  Call: (274) [user] symbol(1391)
^  Unify: (274) [user] symbol(1391)
   Call: (275) [system] atom(1391)
   Fail: (275) [system] atom(1391)
^  Fail: (274) [user] symbol(1391)
^  Redo: (273) [user] mfix_vars1(1391, _251762)
   Call: (274) [system] 1391=_251762
   Exit: (274) [system] 1391=1391
^  Exit: (273) [user] mfix_vars1(1391, 1391)
   Call: (273) [apply] apply:maplist_([0], _251764, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_286088|_286090], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _286088)
^  Unify: (274) [user] mfix_vars1(0, _286088)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _286088)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_290734))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _286088)
^  Unify: (274) [user] mfix_vars1(0, _286088)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _286088)
^  Unify: (274) [user] mfix_vars1(0, _286088)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _286088)
^  Unify: (274) [user] mfix_vars1(0, _286088)
   Call: (275) [system] 0==[_300014, _300020]
^  Redo: (274) [user] mfix_vars1(0, _286088)
^  Unify: (274) [user] mfix_vars1(0, _286088)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _286088)
^  Unify: (274) [user] mfix_vars1(0, _286088)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _286088)
^  Unify: (274) [user] mfix_vars1(0, _286088)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _286088)
^  Unify: (274) [user] mfix_vars1(0, _286088)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _286088)
   Call: (275) [system] 0=_286088
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _286090, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1391, 0], [1391, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    }", 1391, 0], [";;    }", 1391, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1391, 0], [";;    }", 1391, 0])
   Call: (270) [system] compound_name_arguments(_180262, '$COMMENT', [";;    }", 1391, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1391, 0), '$COMMENT', [";;    }", 1391, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1391, 0)\=@='$COMMENT'(";;    }", 1391, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1391, 0), _174676)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    }", 1391, 0), _336262))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1391, 0), _336262))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1391, 0), _336262))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1391, 0), _336262))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1391, 0), _336262)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1391, 0), _336262)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    }", 1391, 0), _341848))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1391, 0), _341848))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    }", 1391, 0), _341848)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1391, 0), _341848)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    }", 1391, 0), _341848)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1391, 0)\=@='$COMMENT'(";;    }", 1391, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1391, 0), _336262)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    }", 1391, 0), _169064))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1391, 0), _169064))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1391, 0), _169064))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1391, 0), _169064))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1391, 0), _169064)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1391, 0), _169064)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    }", 1391, 0), _364168))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1391, 0), _364168))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    }", 1391, 0), _364168)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1391, 0), _364168)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    }", 1391, 0), _364168)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1391, 0)\=@='$COMMENT'(";;    }", 1391, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1391, 0), _169064)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0)))
   Call: (261) [system] '$COMMENT'(";;    }", 1391, 0)\=@='$COMMENT'(";;    }", 1391, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1391, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1391, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1391, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1391, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1391, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    }", 1391, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    }", 1391, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    }", 1391, 0), _392946, [], _392948)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    }", 1391, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1391, 0), _392946, [], _392948)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1391, 0), _392946, [], _392948)
   Call: (258) [system] atom('$COMMENT'(";;    }", 1391, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1391, 0), _392946, [], _392948)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1391, 0), _392946, [], _392948)
   Call: (258) [system] compound('$COMMENT'(";;    }", 1391, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    }", 1391, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1391, 0), _402262, _402264)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1391, 0), '$COMMENT', [";;    }", 1391, 0])
^  Call: (258) [user] subst_vars([";;    }", 1391, 0], _404148, [], _392948)
^  Unify: (258) [user] subst_vars([";;    }", 1391, 0], [";;    }", 1391, 0], [], [])
   Call: (259) [system] var([";;    }", 1391, 0])
^  Redo: (258) [user] subst_vars([";;    }", 1391, 0], _404148, [], _392948)
^  Unify: (258) [user] subst_vars([";;    }", 1391, 0], [_407884|_407886], [], _392948)
^  Call: (259) [user] subst_vars(";;    }", _407884, [], _408824)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
   Call: (260) [system] var(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _407884, [], _408824)
^  Unify: (259) [user] subst_vars(";;    }", _407884, [], _408824)
   Call: (260) [system] atom(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _407884, [], _408824)
^  Unify: (259) [user] subst_vars(";;    }", _407884, [], _408824)
   Call: (260) [system] compound(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _407884, [], _408824)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Exit: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Call: (259) [user] subst_vars([1391, 0], _407886, [], _392948)
^  Unify: (259) [user] subst_vars([1391, 0], [1391, 0], [], [])
   Call: (260) [system] var([1391, 0])
^  Redo: (259) [user] subst_vars([1391, 0], _407886, [], _392948)
^  Unify: (259) [user] subst_vars([1391, 0], [_423756|_423758], [], _392948)
^  Call: (260) [user] subst_vars(1391, _423756, [], _424696)
^  Unify: (260) [user] subst_vars(1391, 1391, [], [])
   Call: (261) [system] var(1391)
^  Redo: (260) [user] subst_vars(1391, _423756, [], _424696)
^  Unify: (260) [user] subst_vars(1391, _423756, [], _424696)
   Call: (261) [system] atom(1391)
^  Redo: (260) [user] subst_vars(1391, _423756, [], _424696)
^  Unify: (260) [user] subst_vars(1391, _423756, [], _424696)
   Call: (261) [system] compound(1391)
^  Redo: (260) [user] subst_vars(1391, _423756, [], _424696)
^  Unify: (260) [user] subst_vars(1391, 1391, [], [])
^  Exit: (260) [user] subst_vars(1391, 1391, [], [])
^  Call: (260) [user] subst_vars([0], _423758, [], _392948)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _423758, [], _392948)
^  Unify: (260) [user] subst_vars([0], [_439628|_439630], [], _392948)
^  Call: (261) [user] subst_vars(0, _439628, [], _440568)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _439628, [], _440568)
^  Unify: (261) [user] subst_vars(0, _439628, [], _440568)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _439628, [], _440568)
^  Unify: (261) [user] subst_vars(0, _439628, [], _440568)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _439628, [], _440568)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _439630, [], _392948)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _439630, [], _392948)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1391, 0], [1391, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    }", 1391, 0], [";;    }", 1391, 0], [], [])
   Call: (258) [system] compound_name_arguments(_392946, '$COMMENT', [";;    }", 1391, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1391, 0), '$COMMENT', [";;    }", 1391, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    }", 1391, 0), '$COMMENT'(";;    }", 1391, 0), [], [])
   Call: (257) [system] _462986=metta_file_buffer(+, '$COMMENT'(";;    }", 1391, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    }", 1391, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    }", 1391, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1391, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1391, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1391, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1391, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1391, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1391, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1392, 0, 50153, '$COMMENT'(";; Converted:", 1392, 0), '$stream_position'(50153, 1392, 0, 50187)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1392, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1392, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1392, 0), _515704))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1392, 0), _515704))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1392, 0), _515704)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1392, 0), _515704)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1392, 0), _515704)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1392, 0), _515704)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1392, 0), _521316))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1392, 0), _521316))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1392, 0), _521316))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1392, 0), _5964))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1392, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1392, 0), _5964)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1392, 0), _8736))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1392, 0), _8736))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1392, 0), _8736)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1392, 0), _8736)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1392, 0), _8736)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1392, 0), _8736)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1392, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1392, 0), _8736)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1392, 0), '$VAR'(_16196))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1392, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1392, 0), _8736)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1392, 0), _8736)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1392, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1392, 0), _8736)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1392, 0), _8736)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1392, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1392, 0), _8736)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1392, 0), _8736)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1392, 0)==[_25476, _25482]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1392, 0), _8736)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1392, 0), _8736)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1392, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1392, 0), _8736)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1392, 0), _8736)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1392, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1392, 0), _8736)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1392, 0), _8736)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1392, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1392, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1392, 0), _35678, _35680)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1392, 0), '$COMMENT', [";; Converted:", 1392, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1392, 0], _39420)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1392, 0], _39420)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1392, 0], _39420, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1392, 0], [_42238|_42240], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _42238)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _42238)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _42238)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_46884))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _42238)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _42238)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _42238)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _42238)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _42238)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _42238)
   Call: (273) [system] ";; Converted:"==[_56164, _56170]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _42238)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _42238)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _42238)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _42238)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _42238)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _42238)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _42238)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _42238)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _42238)
   Call: (273) [system] ";; Converted:"=_42238
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1392, 0], _42240, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1392, 0], [_80236|_80238], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1392, _80236)
^  Unify: (273) [user] mfix_vars1(1392, _80236)
   Call: (274) [system] var(1392)
^  Redo: (273) [user] mfix_vars1(1392, _80236)
^  Unify: (273) [user] mfix_vars1(1392, '$VAR'(_84882))
   Call: (274) [system] atom(1392)
^  Redo: (273) [user] mfix_vars1(1392, _80236)
^  Unify: (273) [user] mfix_vars1(1392, _80236)
   Call: (274) [system] 1392==true
^  Redo: (273) [user] mfix_vars1(1392, _80236)
^  Unify: (273) [user] mfix_vars1(1392, _80236)
   Call: (274) [system] 1392==false
^  Redo: (273) [user] mfix_vars1(1392, _80236)
^  Unify: (273) [user] mfix_vars1(1392, _80236)
   Call: (274) [system] 1392==[_94162, _94168]
^  Redo: (273) [user] mfix_vars1(1392, _80236)
^  Unify: (273) [user] mfix_vars1(1392, _80236)
   Call: (274) [system] is_list(1392)
^  Redo: (273) [user] mfix_vars1(1392, _80236)
^  Unify: (273) [user] mfix_vars1(1392, _80236)
   Call: (274) [system] string(1392)
^  Redo: (273) [user] mfix_vars1(1392, _80236)
^  Unify: (273) [user] mfix_vars1(1392, _80236)
   Call: (274) [system] compound(1392)
^  Redo: (273) [user] mfix_vars1(1392, _80236)
^  Unify: (273) [user] mfix_vars1(1392, _80236)
^  Call: (274) [user] symbol(1392)
^  Unify: (274) [user] symbol(1392)
   Call: (275) [system] atom(1392)
   Fail: (275) [system] atom(1392)
^  Fail: (274) [user] symbol(1392)
^  Redo: (273) [user] mfix_vars1(1392, _80236)
   Call: (274) [system] 1392=_80236
   Exit: (274) [system] 1392=1392
^  Exit: (273) [user] mfix_vars1(1392, 1392)
   Call: (273) [apply] apply:maplist_([0], _80238, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_114562|_114564], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _114562)
^  Unify: (274) [user] mfix_vars1(0, _114562)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _114562)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_119208))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _114562)
^  Unify: (274) [user] mfix_vars1(0, _114562)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _114562)
^  Unify: (274) [user] mfix_vars1(0, _114562)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _114562)
^  Unify: (274) [user] mfix_vars1(0, _114562)
   Call: (275) [system] 0==[_128488, _128494]
^  Redo: (274) [user] mfix_vars1(0, _114562)
^  Unify: (274) [user] mfix_vars1(0, _114562)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _114562)
^  Unify: (274) [user] mfix_vars1(0, _114562)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _114562)
^  Unify: (274) [user] mfix_vars1(0, _114562)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _114562)
^  Unify: (274) [user] mfix_vars1(0, _114562)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _114562)
   Call: (275) [system] 0=_114562
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _114564, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1392, 0], [1392, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1392, 0], [";; Converted:", 1392, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1392, 0], [";; Converted:", 1392, 0])
   Call: (270) [system] compound_name_arguments(_8736, '$COMMENT', [";; Converted:", 1392, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1392, 0), '$COMMENT', [";; Converted:", 1392, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1392, 0)\=@='$COMMENT'(";; Converted:", 1392, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1392, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1392, 0), _164736))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1392, 0), _164736))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1392, 0), _164736))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1392, 0), _164736))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1392, 0), _164736)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1392, 0), _164736)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1392, 0), _170322))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1392, 0), _170322))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1392, 0), _170322)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1392, 0), _170322)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1392, 0), _170322)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1392, 0)\=@='$COMMENT'(";; Converted:", 1392, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1392, 0), _164736)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1392, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1392, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1392, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1392, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1392, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1392, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1392, 0), _192642))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1392, 0), _192642))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1392, 0), _192642)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1392, 0), _192642)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1392, 0), _192642)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1392, 0)\=@='$COMMENT'(";; Converted:", 1392, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1392, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1392, 0)\=@='$COMMENT'(";; Converted:", 1392, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1392, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1392, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1392, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1392, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1392, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1392, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1392, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1392, 0), _221420, [], _221422)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1392, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1392, 0), _221420, [], _221422)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1392, 0), _221420, [], _221422)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1392, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1392, 0), _221420, [], _221422)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1392, 0), _221420, [], _221422)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1392, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1392, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1392, 0), _230736, _230738)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1392, 0), '$COMMENT', [";; Converted:", 1392, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1392, 0], _232622, [], _221422)
^  Unify: (258) [user] subst_vars([";; Converted:", 1392, 0], [";; Converted:", 1392, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1392, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1392, 0], _232622, [], _221422)
^  Unify: (258) [user] subst_vars([";; Converted:", 1392, 0], [_236358|_236360], [], _221422)
^  Call: (259) [user] subst_vars(";; Converted:", _236358, [], _237298)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _236358, [], _237298)
^  Unify: (259) [user] subst_vars(";; Converted:", _236358, [], _237298)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _236358, [], _237298)
^  Unify: (259) [user] subst_vars(";; Converted:", _236358, [], _237298)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _236358, [], _237298)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1392, 0], _236360, [], _221422)
^  Unify: (259) [user] subst_vars([1392, 0], [1392, 0], [], [])
   Call: (260) [system] var([1392, 0])
^  Redo: (259) [user] subst_vars([1392, 0], _236360, [], _221422)
^  Unify: (259) [user] subst_vars([1392, 0], [_252230|_252232], [], _221422)
^  Call: (260) [user] subst_vars(1392, _252230, [], _253170)
^  Unify: (260) [user] subst_vars(1392, 1392, [], [])
   Call: (261) [system] var(1392)
^  Redo: (260) [user] subst_vars(1392, _252230, [], _253170)
^  Unify: (260) [user] subst_vars(1392, _252230, [], _253170)
   Call: (261) [system] atom(1392)
^  Redo: (260) [user] subst_vars(1392, _252230, [], _253170)
^  Unify: (260) [user] subst_vars(1392, _252230, [], _253170)
   Call: (261) [system] compound(1392)
^  Redo: (260) [user] subst_vars(1392, _252230, [], _253170)
^  Unify: (260) [user] subst_vars(1392, 1392, [], [])
^  Exit: (260) [user] subst_vars(1392, 1392, [], [])
^  Call: (260) [user] subst_vars([0], _252232, [], _221422)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _252232, [], _221422)
^  Unify: (260) [user] subst_vars([0], [_268102|_268104], [], _221422)
^  Call: (261) [user] subst_vars(0, _268102, [], _269042)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _268102, [], _269042)
^  Unify: (261) [user] subst_vars(0, _268102, [], _269042)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _268102, [], _269042)
^  Unify: (261) [user] subst_vars(0, _268102, [], _269042)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _268102, [], _269042)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _268104, [], _221422)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _268104, [], _221422)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1392, 0], [1392, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1392, 0], [";; Converted:", 1392, 0], [], [])
   Call: (258) [system] compound_name_arguments(_221420, '$COMMENT', [";; Converted:", 1392, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1392, 0), '$COMMENT', [";; Converted:", 1392, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1392, 0), '$COMMENT'(";; Converted:", 1392, 0), [], [])
   Call: (257) [system] _291460=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1392, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1392, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1392, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1392, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1392, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1392, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1392, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1392, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1392, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1395, 0, 50213, '$COMMENT'(";; Original:", 1395, 0), '$stream_position'(50213, 1395, 0, 50247)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1395, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1395, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1395, 0), _344178))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1395, 0), _344178))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1395, 0), _344178)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1395, 0), _344178)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1395, 0), _344178)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1395, 0), _344178)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1395, 0), _349790))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1395, 0), _349790))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1395, 0), _349790))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1395, 0), _349790))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1395, 0), _349790)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1395, 0), _349790)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1395, 0), _355376))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1395, 0), _355376))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1395, 0), _355376)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1395, 0), _355376)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1395, 0), _355376)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1395, 0), _355376)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1395, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1395, 0), _355376)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1395, 0), '$VAR'(_362836))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1395, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1395, 0), _355376)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1395, 0), _355376)
   Call: (270) [system] '$COMMENT'(";; Original:", 1395, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1395, 0), _355376)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1395, 0), _355376)
   Call: (270) [system] '$COMMENT'(";; Original:", 1395, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1395, 0), _355376)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1395, 0), _355376)
   Call: (270) [system] '$COMMENT'(";; Original:", 1395, 0)==[_372116, _372122]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1395, 0), _355376)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1395, 0), _355376)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1395, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1395, 0), _355376)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1395, 0), _355376)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1395, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1395, 0), _355376)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1395, 0), _355376)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1395, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1395, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1395, 0), _382318, _382320)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1395, 0), '$COMMENT', [";; Original:", 1395, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1395, 0], _386060)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1395, 0], _386060)
   Call: (271) [apply] apply:maplist_([";; Original:", 1395, 0], _386060, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1395, 0], [_388878|_388880], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _388878)
^  Unify: (272) [user] mfix_vars1(";; Original:", _388878)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _388878)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_393524))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _388878)
^  Unify: (272) [user] mfix_vars1(";; Original:", _388878)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _388878)
^  Unify: (272) [user] mfix_vars1(";; Original:", _388878)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _388878)
^  Unify: (272) [user] mfix_vars1(";; Original:", _388878)
   Call: (273) [system] ";; Original:"==[_402804, _402810]
^  Redo: (272) [user] mfix_vars1(";; Original:", _388878)
^  Unify: (272) [user] mfix_vars1(";; Original:", _388878)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _388878)
^  Unify: (272) [user] mfix_vars1(";; Original:", _388878)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _388878)
^  Unify: (272) [user] mfix_vars1(";; Original:", _388878)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _388878)
^  Unify: (272) [user] mfix_vars1(";; Original:", _388878)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _388878)
   Call: (273) [system] ";; Original:"=_388878
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1395, 0], _388880, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1395, 0], [_426876|_426878], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1395, _426876)
^  Unify: (273) [user] mfix_vars1(1395, _426876)
   Call: (274) [system] var(1395)
^  Redo: (273) [user] mfix_vars1(1395, _426876)
^  Unify: (273) [user] mfix_vars1(1395, '$VAR'(_431522))
   Call: (274) [system] atom(1395)
^  Redo: (273) [user] mfix_vars1(1395, _426876)
^  Unify: (273) [user] mfix_vars1(1395, _426876)
   Call: (274) [system] 1395==true
^  Redo: (273) [user] mfix_vars1(1395, _426876)
^  Unify: (273) [user] mfix_vars1(1395, _426876)
   Call: (274) [system] 1395==false
^  Redo: (273) [user] mfix_vars1(1395, _426876)
^  Unify: (273) [user] mfix_vars1(1395, _426876)
   Call: (274) [system] 1395==[_440802, _440808]
^  Redo: (273) [user] mfix_vars1(1395, _426876)
^  Unify: (273) [user] mfix_vars1(1395, _426876)
   Call: (274) [system] is_list(1395)
^  Redo: (273) [user] mfix_vars1(1395, _426876)
^  Unify: (273) [user] mfix_vars1(1395, _426876)
   Call: (274) [system] string(1395)
^  Redo: (273) [user] mfix_vars1(1395, _426876)
^  Unify: (273) [user] mfix_vars1(1395, _426876)
   Call: (274) [system] compound(1395)
^  Redo: (273) [user] mfix_vars1(1395, _426876)
^  Unify: (273) [user] mfix_vars1(1395, _426876)
^  Call: (274) [user] symbol(1395)
^  Unify: (274) [user] symbol(1395)
   Call: (275) [system] atom(1395)
   Fail: (275) [system] atom(1395)
^  Fail: (274) [user] symbol(1395)
^  Redo: (273) [user] mfix_vars1(1395, _426876)
   Call: (274) [system] 1395=_426876
   Exit: (274) [system] 1395=1395
^  Exit: (273) [user] mfix_vars1(1395, 1395)
   Call: (273) [apply] apply:maplist_([0], _426878, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_461202|_461204], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _461202)
^  Unify: (274) [user] mfix_vars1(0, _461202)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _461202)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_465848))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _461202)
^  Unify: (274) [user] mfix_vars1(0, _461202)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _461202)
^  Unify: (274) [user] mfix_vars1(0, _461202)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _461202)
^  Unify: (274) [user] mfix_vars1(0, _461202)
   Call: (275) [system] 0==[_475128, _475134]
^  Redo: (274) [user] mfix_vars1(0, _461202)
^  Unify: (274) [user] mfix_vars1(0, _461202)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _461202)
^  Unify: (274) [user] mfix_vars1(0, _461202)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _461202)
^  Unify: (274) [user] mfix_vars1(0, _461202)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _461202)
^  Unify: (274) [user] mfix_vars1(0, _461202)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _461202)
   Call: (275) [system] 0=_461202
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _461204, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1395, 0], [1395, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1395, 0], [";; Original:", 1395, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1395, 0], [";; Original:", 1395, 0])
   Call: (270) [system] compound_name_arguments(_355376, '$COMMENT', [";; Original:", 1395, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1395, 0), '$COMMENT', [";; Original:", 1395, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1395, 0)\=@='$COMMENT'(";; Original:", 1395, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1395, 0), _349790)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1395, 0), _511376))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1395, 0), _511376))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1395, 0), _511376))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1395, 0), _511376))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1395, 0), _511376)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1395, 0), _511376)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1395, 0), _516962))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1395, 0), _516962))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1395, 0), _516962)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1395, 0), _516962)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1395, 0), _516962)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1395, 0)\=@='$COMMENT'(";; Original:", 1395, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1395, 0), _5966)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1395, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1395, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1395, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1395, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1395, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1395, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1395, 0), _21394))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1395, 0), _21394))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1395, 0), _21394)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1395, 0), _21394)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1395, 0), _21394)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1395, 0)\=@='$COMMENT'(";; Original:", 1395, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1395, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1395, 0)\=@='$COMMENT'(";; Original:", 1395, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1395, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1395, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1395, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1395, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1395, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1395, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1395, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1395, 0), _50172, [], _50174)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1395, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1395, 0), _50172, [], _50174)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1395, 0), _50172, [], _50174)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1395, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1395, 0), _50172, [], _50174)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1395, 0), _50172, [], _50174)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1395, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1395, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1395, 0), _59488, _59490)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1395, 0), '$COMMENT', [";; Original:", 1395, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1395, 0], _61374, [], _50174)
^  Unify: (258) [user] subst_vars([";; Original:", 1395, 0], [";; Original:", 1395, 0], [], [])
   Call: (259) [system] var([";; Original:", 1395, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1395, 0], _61374, [], _50174)
^  Unify: (258) [user] subst_vars([";; Original:", 1395, 0], [_65110|_65112], [], _50174)
^  Call: (259) [user] subst_vars(";; Original:", _65110, [], _66050)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _65110, [], _66050)
^  Unify: (259) [user] subst_vars(";; Original:", _65110, [], _66050)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _65110, [], _66050)
^  Unify: (259) [user] subst_vars(";; Original:", _65110, [], _66050)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _65110, [], _66050)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1395, 0], _65112, [], _50174)
^  Unify: (259) [user] subst_vars([1395, 0], [1395, 0], [], [])
   Call: (260) [system] var([1395, 0])
^  Redo: (259) [user] subst_vars([1395, 0], _65112, [], _50174)
^  Unify: (259) [user] subst_vars([1395, 0], [_80982|_80984], [], _50174)
^  Call: (260) [user] subst_vars(1395, _80982, [], _81922)
^  Unify: (260) [user] subst_vars(1395, 1395, [], [])
   Call: (261) [system] var(1395)
^  Redo: (260) [user] subst_vars(1395, _80982, [], _81922)
^  Unify: (260) [user] subst_vars(1395, _80982, [], _81922)
   Call: (261) [system] atom(1395)
^  Redo: (260) [user] subst_vars(1395, _80982, [], _81922)
^  Unify: (260) [user] subst_vars(1395, _80982, [], _81922)
   Call: (261) [system] compound(1395)
^  Redo: (260) [user] subst_vars(1395, _80982, [], _81922)
^  Unify: (260) [user] subst_vars(1395, 1395, [], [])
^  Exit: (260) [user] subst_vars(1395, 1395, [], [])
^  Call: (260) [user] subst_vars([0], _80984, [], _50174)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _80984, [], _50174)
^  Unify: (260) [user] subst_vars([0], [_96854|_96856], [], _50174)
^  Call: (261) [user] subst_vars(0, _96854, [], _97794)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _96854, [], _97794)
^  Unify: (261) [user] subst_vars(0, _96854, [], _97794)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _96854, [], _97794)
^  Unify: (261) [user] subst_vars(0, _96854, [], _97794)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _96854, [], _97794)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _96856, [], _50174)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _96856, [], _50174)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1395, 0], [1395, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1395, 0], [";; Original:", 1395, 0], [], [])
   Call: (258) [system] compound_name_arguments(_50172, '$COMMENT', [";; Original:", 1395, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1395, 0), '$COMMENT', [";; Original:", 1395, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1395, 0), '$COMMENT'(";; Original:", 1395, 0), [], [])
   Call: (257) [system] _120212=metta_file_buffer(+, '$COMMENT'(";; Original:", 1395, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1395, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1395, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1395, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1395, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1395, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1395, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1395, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1395, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1396, 0, 50226, '$COMMENT'(";;    #[test]", 1396, 0), '$stream_position'(50226, 1396, 0, 50260)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1396, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1396, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1396, 0), _172930))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1396, 0), _172930))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1396, 0), _172930)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1396, 0), _172930)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1396, 0), _172930)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1396, 0), _172930)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1396, 0), _178542))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1396, 0), _178542))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1396, 0), _178542))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1396, 0), _178542))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1396, 0), _178542)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1396, 0), _178542)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    #[test]", 1396, 0), _184128))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1396, 0), _184128))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    #[test]", 1396, 0), _184128)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1396, 0), _184128)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1396, 0), _184128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1396, 0), _184128)
   Call: (270) [system] var('$COMMENT'(";;    #[test]", 1396, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1396, 0), _184128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1396, 0), '$VAR'(_191588))
   Call: (270) [system] atom('$COMMENT'(";;    #[test]", 1396, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1396, 0), _184128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1396, 0), _184128)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1396, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1396, 0), _184128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1396, 0), _184128)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1396, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1396, 0), _184128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1396, 0), _184128)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1396, 0)==[_200868, _200874]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1396, 0), _184128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1396, 0), _184128)
   Call: (270) [system] is_list('$COMMENT'(";;    #[test]", 1396, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1396, 0), _184128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1396, 0), _184128)
   Call: (270) [system] string('$COMMENT'(";;    #[test]", 1396, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1396, 0), _184128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1396, 0), _184128)
   Call: (270) [system] compound('$COMMENT'(";;    #[test]", 1396, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    #[test]", 1396, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1396, 0), _211070, _211072)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT', [";;    #[test]", 1396, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    #[test]", 1396, 0], _214812)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1396, 0], _214812)
   Call: (271) [apply] apply:maplist_([";;    #[test]", 1396, 0], _214812, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    #[test]", 1396, 0], [_217630|_217632], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    #[test]", _217630)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _217630)
   Call: (273) [system] var(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _217630)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", '$VAR'(_222276))
   Call: (273) [system] atom(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _217630)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _217630)
   Call: (273) [system] ";;    #[test]"==true
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _217630)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _217630)
   Call: (273) [system] ";;    #[test]"==false
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _217630)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _217630)
   Call: (273) [system] ";;    #[test]"==[_231556, _231562]
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _217630)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _217630)
   Call: (273) [system] is_list(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _217630)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _217630)
   Call: (273) [system] string(";;    #[test]")
   Exit: (273) [system] string(";;    #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _217630)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _217630)
   Call: (273) [system] compound(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _217630)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _217630)
^  Call: (273) [user] symbol(";;    #[test]")
^  Unify: (273) [user] symbol(";;    #[test]")
   Call: (274) [system] atom(";;    #[test]")
   Fail: (274) [system] atom(";;    #[test]")
^  Fail: (273) [user] symbol(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _217630)
   Call: (273) [system] ";;    #[test]"=_217630
   Exit: (273) [system] ";;    #[test]"=";;    #[test]"
^  Exit: (272) [user] mfix_vars1(";;    #[test]", ";;    #[test]")
   Call: (272) [apply] apply:maplist_([1396, 0], _217632, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1396, 0], [_255628|_255630], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1396, _255628)
^  Unify: (273) [user] mfix_vars1(1396, _255628)
   Call: (274) [system] var(1396)
^  Redo: (273) [user] mfix_vars1(1396, _255628)
^  Unify: (273) [user] mfix_vars1(1396, '$VAR'(_260274))
   Call: (274) [system] atom(1396)
^  Redo: (273) [user] mfix_vars1(1396, _255628)
^  Unify: (273) [user] mfix_vars1(1396, _255628)
   Call: (274) [system] 1396==true
^  Redo: (273) [user] mfix_vars1(1396, _255628)
^  Unify: (273) [user] mfix_vars1(1396, _255628)
   Call: (274) [system] 1396==false
^  Redo: (273) [user] mfix_vars1(1396, _255628)
^  Unify: (273) [user] mfix_vars1(1396, _255628)
   Call: (274) [system] 1396==[_269554, _269560]
^  Redo: (273) [user] mfix_vars1(1396, _255628)
^  Unify: (273) [user] mfix_vars1(1396, _255628)
   Call: (274) [system] is_list(1396)
^  Redo: (273) [user] mfix_vars1(1396, _255628)
^  Unify: (273) [user] mfix_vars1(1396, _255628)
   Call: (274) [system] string(1396)
^  Redo: (273) [user] mfix_vars1(1396, _255628)
^  Unify: (273) [user] mfix_vars1(1396, _255628)
   Call: (274) [system] compound(1396)
^  Redo: (273) [user] mfix_vars1(1396, _255628)
^  Unify: (273) [user] mfix_vars1(1396, _255628)
^  Call: (274) [user] symbol(1396)
^  Unify: (274) [user] symbol(1396)
   Call: (275) [system] atom(1396)
   Fail: (275) [system] atom(1396)
^  Fail: (274) [user] symbol(1396)
^  Redo: (273) [user] mfix_vars1(1396, _255628)
   Call: (274) [system] 1396=_255628
   Exit: (274) [system] 1396=1396
^  Exit: (273) [user] mfix_vars1(1396, 1396)
   Call: (273) [apply] apply:maplist_([0], _255630, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_289954|_289956], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _289954)
^  Unify: (274) [user] mfix_vars1(0, _289954)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _289954)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_294600))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _289954)
^  Unify: (274) [user] mfix_vars1(0, _289954)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _289954)
^  Unify: (274) [user] mfix_vars1(0, _289954)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _289954)
^  Unify: (274) [user] mfix_vars1(0, _289954)
   Call: (275) [system] 0==[_303880, _303886]
^  Redo: (274) [user] mfix_vars1(0, _289954)
^  Unify: (274) [user] mfix_vars1(0, _289954)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _289954)
^  Unify: (274) [user] mfix_vars1(0, _289954)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _289954)
^  Unify: (274) [user] mfix_vars1(0, _289954)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _289954)
^  Unify: (274) [user] mfix_vars1(0, _289954)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _289954)
   Call: (275) [system] 0=_289954
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _289956, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1396, 0], [1396, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    #[test]", 1396, 0], [";;    #[test]", 1396, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1396, 0], [";;    #[test]", 1396, 0])
   Call: (270) [system] compound_name_arguments(_184128, '$COMMENT', [";;    #[test]", 1396, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT', [";;    #[test]", 1396, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1396, 0)\=@='$COMMENT'(";;    #[test]", 1396, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1396, 0), _178542)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    #[test]", 1396, 0), _340128))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1396, 0), _340128))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1396, 0), _340128))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1396, 0), _340128))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1396, 0), _340128)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1396, 0), _340128)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    #[test]", 1396, 0), _345714))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1396, 0), _345714))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    #[test]", 1396, 0), _345714)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1396, 0), _345714)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1396, 0), _345714)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1396, 0)\=@='$COMMENT'(";;    #[test]", 1396, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1396, 0), _340128)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    #[test]", 1396, 0), _172930))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1396, 0), _172930))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1396, 0), _172930))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1396, 0), _172930))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1396, 0), _172930)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1396, 0), _172930)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    #[test]", 1396, 0), _368034))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1396, 0), _368034))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    #[test]", 1396, 0), _368034)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1396, 0), _368034)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1396, 0), _368034)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1396, 0)\=@='$COMMENT'(";;    #[test]", 1396, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1396, 0), _172930)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0)))
   Call: (261) [system] '$COMMENT'(";;    #[test]", 1396, 0)\=@='$COMMENT'(";;    #[test]", 1396, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1396, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1396, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1396, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1396, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1396, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1396, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1396, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1396, 0), _396812, [], _396814)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    #[test]", 1396, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1396, 0), _396812, [], _396814)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1396, 0), _396812, [], _396814)
   Call: (258) [system] atom('$COMMENT'(";;    #[test]", 1396, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1396, 0), _396812, [], _396814)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1396, 0), _396812, [], _396814)
   Call: (258) [system] compound('$COMMENT'(";;    #[test]", 1396, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    #[test]", 1396, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1396, 0), _406128, _406130)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT', [";;    #[test]", 1396, 0])
^  Call: (258) [user] subst_vars([";;    #[test]", 1396, 0], _408014, [], _396814)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1396, 0], [";;    #[test]", 1396, 0], [], [])
   Call: (259) [system] var([";;    #[test]", 1396, 0])
^  Redo: (258) [user] subst_vars([";;    #[test]", 1396, 0], _408014, [], _396814)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1396, 0], [_411750|_411752], [], _396814)
^  Call: (259) [user] subst_vars(";;    #[test]", _411750, [], _412690)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
   Call: (260) [system] var(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _411750, [], _412690)
^  Unify: (259) [user] subst_vars(";;    #[test]", _411750, [], _412690)
   Call: (260) [system] atom(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _411750, [], _412690)
^  Unify: (259) [user] subst_vars(";;    #[test]", _411750, [], _412690)
   Call: (260) [system] compound(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _411750, [], _412690)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Exit: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Call: (259) [user] subst_vars([1396, 0], _411752, [], _396814)
^  Unify: (259) [user] subst_vars([1396, 0], [1396, 0], [], [])
   Call: (260) [system] var([1396, 0])
^  Redo: (259) [user] subst_vars([1396, 0], _411752, [], _396814)
^  Unify: (259) [user] subst_vars([1396, 0], [_427622|_427624], [], _396814)
^  Call: (260) [user] subst_vars(1396, _427622, [], _428562)
^  Unify: (260) [user] subst_vars(1396, 1396, [], [])
   Call: (261) [system] var(1396)
^  Redo: (260) [user] subst_vars(1396, _427622, [], _428562)
^  Unify: (260) [user] subst_vars(1396, _427622, [], _428562)
   Call: (261) [system] atom(1396)
^  Redo: (260) [user] subst_vars(1396, _427622, [], _428562)
^  Unify: (260) [user] subst_vars(1396, _427622, [], _428562)
   Call: (261) [system] compound(1396)
^  Redo: (260) [user] subst_vars(1396, _427622, [], _428562)
^  Unify: (260) [user] subst_vars(1396, 1396, [], [])
^  Exit: (260) [user] subst_vars(1396, 1396, [], [])
^  Call: (260) [user] subst_vars([0], _427624, [], _396814)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _427624, [], _396814)
^  Unify: (260) [user] subst_vars([0], [_443494|_443496], [], _396814)
^  Call: (261) [user] subst_vars(0, _443494, [], _444434)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _443494, [], _444434)
^  Unify: (261) [user] subst_vars(0, _443494, [], _444434)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _443494, [], _444434)
^  Unify: (261) [user] subst_vars(0, _443494, [], _444434)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _443494, [], _444434)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _443496, [], _396814)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _443496, [], _396814)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1396, 0], [1396, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    #[test]", 1396, 0], [";;    #[test]", 1396, 0], [], [])
   Call: (258) [system] compound_name_arguments(_396812, '$COMMENT', [";;    #[test]", 1396, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT', [";;    #[test]", 1396, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1396, 0), '$COMMENT'(";;    #[test]", 1396, 0), [], [])
   Call: (257) [system] _466852=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1396, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1396, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1396, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1396, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1396, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1396, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1396, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1396, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1396, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1397, 0, 50240, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$stream_position'(50240, 1397, 0, 50274)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _519580))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _519580))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _519580)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _519580)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _5954)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _5954)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _7254))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _7254))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _7254))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _7254))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _7254)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _7254)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _12840))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _12840))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _12840)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _12840)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _12840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _12840)
   Call: (270) [system] var('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _12840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$VAR'(_20300))
   Call: (270) [system] atom('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _12840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _12840)
   Call: (270) [system] '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _12840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _12840)
   Call: (270) [system] '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _12840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _12840)
   Call: (270) [system] '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0)==[_29580, _29586]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _12840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _12840)
   Call: (270) [system] is_list('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _12840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _12840)
   Call: (270) [system] string('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _12840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _12840)
   Call: (270) [system] compound('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _39782, _39784)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT', [";;    fn test_let_op_inside_other_operation() {", 1397, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    fn test_let_op_inside_other_operation() {", 1397, 0], _43524)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn test_let_op_inside_other_operation() {", 1397, 0], _43524)
   Call: (271) [apply] apply:maplist_([";;    fn test_let_op_inside_other_operation() {", 1397, 0], _43524, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    fn test_let_op_inside_other_operation() {", 1397, 0], [_46342|_46344], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    fn test_let_op_inside_other_operation() {", _46342)
^  Unify: (272) [user] mfix_vars1(";;    fn test_let_op_inside_other_operation() {", _46342)
   Call: (273) [system] var(";;    fn test_let_op_inside_other_operation() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_let_op_inside_other_operation() {", _46342)
^  Unify: (272) [user] mfix_vars1(";;    fn test_let_op_inside_other_operation() {", '$VAR'(_50988))
   Call: (273) [system] atom(";;    fn test_let_op_inside_other_operation() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_let_op_inside_other_operation() {", _46342)
^  Unify: (272) [user] mfix_vars1(";;    fn test_let_op_inside_other_operation() {", _46342)
   Call: (273) [system] ";;    fn test_let_op_inside_other_operation() {"==true
^  Redo: (272) [user] mfix_vars1(";;    fn test_let_op_inside_other_operation() {", _46342)
^  Unify: (272) [user] mfix_vars1(";;    fn test_let_op_inside_other_operation() {", _46342)
   Call: (273) [system] ";;    fn test_let_op_inside_other_operation() {"==false
^  Redo: (272) [user] mfix_vars1(";;    fn test_let_op_inside_other_operation() {", _46342)
^  Unify: (272) [user] mfix_vars1(";;    fn test_let_op_inside_other_operation() {", _46342)
   Call: (273) [system] ";;    fn test_let_op_inside_other_operation() {"==[_60268, _60274]
^  Redo: (272) [user] mfix_vars1(";;    fn test_let_op_inside_other_operation() {", _46342)
^  Unify: (272) [user] mfix_vars1(";;    fn test_let_op_inside_other_operation() {", _46342)
   Call: (273) [system] is_list(";;    fn test_let_op_inside_other_operation() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_let_op_inside_other_operation() {", _46342)
^  Unify: (272) [user] mfix_vars1(";;    fn test_let_op_inside_other_operation() {", _46342)
   Call: (273) [system] string(";;    fn test_let_op_inside_other_operation() {")
   Exit: (273) [system] string(";;    fn test_let_op_inside_other_operation() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    fn test_let_op_inside_other_operation() {", _46342)
^  Unify: (272) [user] mfix_vars1(";;    fn test_let_op_inside_other_operation() {", _46342)
   Call: (273) [system] compound(";;    fn test_let_op_inside_other_operation() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_let_op_inside_other_operation() {", _46342)
^  Unify: (272) [user] mfix_vars1(";;    fn test_let_op_inside_other_operation() {", _46342)
^  Call: (273) [user] symbol(";;    fn test_let_op_inside_other_operation() {")
^  Unify: (273) [user] symbol(";;    fn test_let_op_inside_other_operation() {")
   Call: (274) [system] atom(";;    fn test_let_op_inside_other_operation() {")
   Fail: (274) [system] atom(";;    fn test_let_op_inside_other_operation() {")
^  Fail: (273) [user] symbol(";;    fn test_let_op_inside_other_operation() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_let_op_inside_other_operation() {", _46342)
   Call: (273) [system] ";;    fn test_let_op_inside_other_operation() {"=_46342
   Exit: (273) [system] ";;    fn test_let_op_inside_other_operation() {"=";;    fn test_let_op_inside_other_operation() {"
^  Exit: (272) [user] mfix_vars1(";;    fn test_let_op_inside_other_operation() {", ";;    fn test_let_op_inside_other_operation() {")
   Call: (272) [apply] apply:maplist_([1397, 0], _46344, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1397, 0], [_84340|_84342], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1397, _84340)
^  Unify: (273) [user] mfix_vars1(1397, _84340)
   Call: (274) [system] var(1397)
^  Redo: (273) [user] mfix_vars1(1397, _84340)
^  Unify: (273) [user] mfix_vars1(1397, '$VAR'(_88986))
   Call: (274) [system] atom(1397)
^  Redo: (273) [user] mfix_vars1(1397, _84340)
^  Unify: (273) [user] mfix_vars1(1397, _84340)
   Call: (274) [system] 1397==true
^  Redo: (273) [user] mfix_vars1(1397, _84340)
^  Unify: (273) [user] mfix_vars1(1397, _84340)
   Call: (274) [system] 1397==false
^  Redo: (273) [user] mfix_vars1(1397, _84340)
^  Unify: (273) [user] mfix_vars1(1397, _84340)
   Call: (274) [system] 1397==[_98266, _98272]
^  Redo: (273) [user] mfix_vars1(1397, _84340)
^  Unify: (273) [user] mfix_vars1(1397, _84340)
   Call: (274) [system] is_list(1397)
^  Redo: (273) [user] mfix_vars1(1397, _84340)
^  Unify: (273) [user] mfix_vars1(1397, _84340)
   Call: (274) [system] string(1397)
^  Redo: (273) [user] mfix_vars1(1397, _84340)
^  Unify: (273) [user] mfix_vars1(1397, _84340)
   Call: (274) [system] compound(1397)
^  Redo: (273) [user] mfix_vars1(1397, _84340)
^  Unify: (273) [user] mfix_vars1(1397, _84340)
^  Call: (274) [user] symbol(1397)
^  Unify: (274) [user] symbol(1397)
   Call: (275) [system] atom(1397)
   Fail: (275) [system] atom(1397)
^  Fail: (274) [user] symbol(1397)
^  Redo: (273) [user] mfix_vars1(1397, _84340)
   Call: (274) [system] 1397=_84340
   Exit: (274) [system] 1397=1397
^  Exit: (273) [user] mfix_vars1(1397, 1397)
   Call: (273) [apply] apply:maplist_([0], _84342, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_118666|_118668], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _118666)
^  Unify: (274) [user] mfix_vars1(0, _118666)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _118666)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_123312))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _118666)
^  Unify: (274) [user] mfix_vars1(0, _118666)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _118666)
^  Unify: (274) [user] mfix_vars1(0, _118666)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _118666)
^  Unify: (274) [user] mfix_vars1(0, _118666)
   Call: (275) [system] 0==[_132592, _132598]
^  Redo: (274) [user] mfix_vars1(0, _118666)
^  Unify: (274) [user] mfix_vars1(0, _118666)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _118666)
^  Unify: (274) [user] mfix_vars1(0, _118666)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _118666)
^  Unify: (274) [user] mfix_vars1(0, _118666)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _118666)
^  Unify: (274) [user] mfix_vars1(0, _118666)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _118666)
   Call: (275) [system] 0=_118666
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _118668, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1397, 0], [1397, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    fn test_let_op_inside_other_operation() {", 1397, 0], [";;    fn test_let_op_inside_other_operation() {", 1397, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn test_let_op_inside_other_operation() {", 1397, 0], [";;    fn test_let_op_inside_other_operation() {", 1397, 0])
   Call: (270) [system] compound_name_arguments(_12840, '$COMMENT', [";;    fn test_let_op_inside_other_operation() {", 1397, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT', [";;    fn test_let_op_inside_other_operation() {", 1397, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0)\=@='$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _7254)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _168840))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _168840))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _168840))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _168840))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _168840)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _168840)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _174426))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _174426))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _174426)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _174426)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _174426)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0)\=@='$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _168840)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _5954))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _5954))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _5954))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _5954))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _5954)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _5954)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _196746))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _196746))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _196746)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _196746)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _196746)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0)\=@='$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _5954)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0)))
   Call: (261) [system] '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0)\=@='$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _225524, [], _225526)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _225524, [], _225526)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _225524, [], _225526)
   Call: (258) [system] atom('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _225524, [], _225526)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _225524, [], _225526)
   Call: (258) [system] compound('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), _234840, _234842)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT', [";;    fn test_let_op_inside_other_operation() {", 1397, 0])
^  Call: (258) [user] subst_vars([";;    fn test_let_op_inside_other_operation() {", 1397, 0], _236726, [], _225526)
^  Unify: (258) [user] subst_vars([";;    fn test_let_op_inside_other_operation() {", 1397, 0], [";;    fn test_let_op_inside_other_operation() {", 1397, 0], [], [])
   Call: (259) [system] var([";;    fn test_let_op_inside_other_operation() {", 1397, 0])
^  Redo: (258) [user] subst_vars([";;    fn test_let_op_inside_other_operation() {", 1397, 0], _236726, [], _225526)
^  Unify: (258) [user] subst_vars([";;    fn test_let_op_inside_other_operation() {", 1397, 0], [_240462|_240464], [], _225526)
^  Call: (259) [user] subst_vars(";;    fn test_let_op_inside_other_operation() {", _240462, [], _241402)
^  Unify: (259) [user] subst_vars(";;    fn test_let_op_inside_other_operation() {", ";;    fn test_let_op_inside_other_operation() {", [], [])
   Call: (260) [system] var(";;    fn test_let_op_inside_other_operation() {")
^  Redo: (259) [user] subst_vars(";;    fn test_let_op_inside_other_operation() {", _240462, [], _241402)
^  Unify: (259) [user] subst_vars(";;    fn test_let_op_inside_other_operation() {", _240462, [], _241402)
   Call: (260) [system] atom(";;    fn test_let_op_inside_other_operation() {")
^  Redo: (259) [user] subst_vars(";;    fn test_let_op_inside_other_operation() {", _240462, [], _241402)
^  Unify: (259) [user] subst_vars(";;    fn test_let_op_inside_other_operation() {", _240462, [], _241402)
   Call: (260) [system] compound(";;    fn test_let_op_inside_other_operation() {")
^  Redo: (259) [user] subst_vars(";;    fn test_let_op_inside_other_operation() {", _240462, [], _241402)
^  Unify: (259) [user] subst_vars(";;    fn test_let_op_inside_other_operation() {", ";;    fn test_let_op_inside_other_operation() {", [], [])
^  Exit: (259) [user] subst_vars(";;    fn test_let_op_inside_other_operation() {", ";;    fn test_let_op_inside_other_operation() {", [], [])
^  Call: (259) [user] subst_vars([1397, 0], _240464, [], _225526)
^  Unify: (259) [user] subst_vars([1397, 0], [1397, 0], [], [])
   Call: (260) [system] var([1397, 0])
^  Redo: (259) [user] subst_vars([1397, 0], _240464, [], _225526)
^  Unify: (259) [user] subst_vars([1397, 0], [_256334|_256336], [], _225526)
^  Call: (260) [user] subst_vars(1397, _256334, [], _257274)
^  Unify: (260) [user] subst_vars(1397, 1397, [], [])
   Call: (261) [system] var(1397)
^  Redo: (260) [user] subst_vars(1397, _256334, [], _257274)
^  Unify: (260) [user] subst_vars(1397, _256334, [], _257274)
   Call: (261) [system] atom(1397)
^  Redo: (260) [user] subst_vars(1397, _256334, [], _257274)
^  Unify: (260) [user] subst_vars(1397, _256334, [], _257274)
   Call: (261) [system] compound(1397)
^  Redo: (260) [user] subst_vars(1397, _256334, [], _257274)
^  Unify: (260) [user] subst_vars(1397, 1397, [], [])
^  Exit: (260) [user] subst_vars(1397, 1397, [], [])
^  Call: (260) [user] subst_vars([0], _256336, [], _225526)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _256336, [], _225526)
^  Unify: (260) [user] subst_vars([0], [_272206|_272208], [], _225526)
^  Call: (261) [user] subst_vars(0, _272206, [], _273146)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _272206, [], _273146)
^  Unify: (261) [user] subst_vars(0, _272206, [], _273146)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _272206, [], _273146)
^  Unify: (261) [user] subst_vars(0, _272206, [], _273146)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _272206, [], _273146)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _272208, [], _225526)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _272208, [], _225526)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1397, 0], [1397, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    fn test_let_op_inside_other_operation() {", 1397, 0], [";;    fn test_let_op_inside_other_operation() {", 1397, 0], [], [])
   Call: (258) [system] compound_name_arguments(_225524, '$COMMENT', [";;    fn test_let_op_inside_other_operation() {", 1397, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT', [";;    fn test_let_op_inside_other_operation() {", 1397, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), [], [])
   Call: (257) [system] _295564=metta_file_buffer(+, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn test_let_op_inside_other_operation() {", 1397, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1398, 0, 50288, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$stream_position'(50288, 1398, 0, 50322)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _348306))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _348306))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _348306)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _348306)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _348306)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _348306)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _353918))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _353918))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _353918))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _353918))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _353918)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _353918)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _359504))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _359504))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _359504)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _359504)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _359504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _359504)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _359504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$VAR'(_366964))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _359504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _359504)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _359504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _359504)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _359504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _359504)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0)==[_376244, _376250]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _359504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _359504)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _359504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _359504)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _359504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _359504)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _386446, _386448)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT', [";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0], _390188)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0], _390188)
   Call: (271) [apply] apply:maplist_([";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0], _390188, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0], [_393006|_393008], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _393006)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _393006)
   Call: (273) [system] var(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _393006)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", '$VAR'(_397652))
   Call: (273) [system] atom(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _393006)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _393006)
   Call: (273) [system] ";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _393006)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _393006)
   Call: (273) [system] ";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _393006)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _393006)
   Call: (273) [system] ";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));"==[_406932, _406938]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _393006)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _393006)
   Call: (273) [system] is_list(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _393006)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _393006)
   Call: (273) [system] string(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));")
   Exit: (273) [system] string(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _393006)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _393006)
   Call: (273) [system] compound(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _393006)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _393006)
^  Call: (273) [user] symbol(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));")
^  Unify: (273) [user] symbol(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));")
   Call: (274) [system] atom(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));")
   Fail: (274) [system] atom(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));")
^  Fail: (273) [user] symbol(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _393006)
   Call: (273) [system] ";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));"=_393006
   Exit: (273) [system] ";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));"=";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", ";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));")
   Call: (272) [apply] apply:maplist_([1398, 0], _393008, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1398, 0], [_431004|_431006], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1398, _431004)
^  Unify: (273) [user] mfix_vars1(1398, _431004)
   Call: (274) [system] var(1398)
^  Redo: (273) [user] mfix_vars1(1398, _431004)
^  Unify: (273) [user] mfix_vars1(1398, '$VAR'(_435650))
   Call: (274) [system] atom(1398)
^  Redo: (273) [user] mfix_vars1(1398, _431004)
^  Unify: (273) [user] mfix_vars1(1398, _431004)
   Call: (274) [system] 1398==true
^  Redo: (273) [user] mfix_vars1(1398, _431004)
^  Unify: (273) [user] mfix_vars1(1398, _431004)
   Call: (274) [system] 1398==false
^  Redo: (273) [user] mfix_vars1(1398, _431004)
^  Unify: (273) [user] mfix_vars1(1398, _431004)
   Call: (274) [system] 1398==[_444930, _444936]
^  Redo: (273) [user] mfix_vars1(1398, _431004)
^  Unify: (273) [user] mfix_vars1(1398, _431004)
   Call: (274) [system] is_list(1398)
^  Redo: (273) [user] mfix_vars1(1398, _431004)
^  Unify: (273) [user] mfix_vars1(1398, _431004)
   Call: (274) [system] string(1398)
^  Redo: (273) [user] mfix_vars1(1398, _431004)
^  Unify: (273) [user] mfix_vars1(1398, _431004)
   Call: (274) [system] compound(1398)
^  Redo: (273) [user] mfix_vars1(1398, _431004)
^  Unify: (273) [user] mfix_vars1(1398, _431004)
^  Call: (274) [user] symbol(1398)
^  Unify: (274) [user] symbol(1398)
   Call: (275) [system] atom(1398)
   Fail: (275) [system] atom(1398)
^  Fail: (274) [user] symbol(1398)
^  Redo: (273) [user] mfix_vars1(1398, _431004)
   Call: (274) [system] 1398=_431004
   Exit: (274) [system] 1398=1398
^  Exit: (273) [user] mfix_vars1(1398, 1398)
   Call: (273) [apply] apply:maplist_([0], _431006, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_465330|_465332], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _465330)
^  Unify: (274) [user] mfix_vars1(0, _465330)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _465330)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_469976))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _465330)
^  Unify: (274) [user] mfix_vars1(0, _465330)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _465330)
^  Unify: (274) [user] mfix_vars1(0, _465330)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _465330)
^  Unify: (274) [user] mfix_vars1(0, _465330)
   Call: (275) [system] 0==[_479256, _479262]
^  Redo: (274) [user] mfix_vars1(0, _465330)
^  Unify: (274) [user] mfix_vars1(0, _465330)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _465330)
^  Unify: (274) [user] mfix_vars1(0, _465330)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _465330)
^  Unify: (274) [user] mfix_vars1(0, _465330)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _465330)
^  Unify: (274) [user] mfix_vars1(0, _465330)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _465330)
   Call: (275) [system] 0=_465330
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _465332, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1398, 0], [1398, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0], [";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0], [";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0])
   Call: (270) [system] compound_name_arguments(_359504, '$COMMENT', [";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT', [";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0)\=@='$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _353918)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _515504))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _515504))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _515504))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _515504))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _515504)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _515504)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _521090))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _521090))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _521090)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _6004)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _6004)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0)\=@='$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _5990)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _5968))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _5968))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _5968))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _5968))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _5968)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _5968)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _25450))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _25450))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _25450)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _25450)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _25450)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0)\=@='$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _5968)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0)\=@='$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _54228, [], _54230)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _54228, [], _54230)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _54228, [], _54230)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _54228, [], _54230)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _54228, [], _54230)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), _63544, _63546)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT', [";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0], _65430, [], _54230)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0], [";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0], [], [])
   Call: (259) [system] var([";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0], _65430, [], _54230)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0], [_69166|_69168], [], _54230)
^  Call: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _69166, [], _70106)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", ";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", [], [])
   Call: (260) [system] var(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _69166, [], _70106)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _69166, [], _70106)
   Call: (260) [system] atom(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _69166, [], _70106)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _69166, [], _70106)
   Call: (260) [system] compound(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", _69166, [], _70106)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", ";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", ";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", [], [])
^  Call: (259) [user] subst_vars([1398, 0], _69168, [], _54230)
^  Unify: (259) [user] subst_vars([1398, 0], [1398, 0], [], [])
   Call: (260) [system] var([1398, 0])
^  Redo: (259) [user] subst_vars([1398, 0], _69168, [], _54230)
^  Unify: (259) [user] subst_vars([1398, 0], [_85038|_85040], [], _54230)
^  Call: (260) [user] subst_vars(1398, _85038, [], _85978)
^  Unify: (260) [user] subst_vars(1398, 1398, [], [])
   Call: (261) [system] var(1398)
^  Redo: (260) [user] subst_vars(1398, _85038, [], _85978)
^  Unify: (260) [user] subst_vars(1398, _85038, [], _85978)
   Call: (261) [system] atom(1398)
^  Redo: (260) [user] subst_vars(1398, _85038, [], _85978)
^  Unify: (260) [user] subst_vars(1398, _85038, [], _85978)
   Call: (261) [system] compound(1398)
^  Redo: (260) [user] subst_vars(1398, _85038, [], _85978)
^  Unify: (260) [user] subst_vars(1398, 1398, [], [])
^  Exit: (260) [user] subst_vars(1398, 1398, [], [])
^  Call: (260) [user] subst_vars([0], _85040, [], _54230)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _85040, [], _54230)
^  Unify: (260) [user] subst_vars([0], [_100910|_100912], [], _54230)
^  Call: (261) [user] subst_vars(0, _100910, [], _101850)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _100910, [], _101850)
^  Unify: (261) [user] subst_vars(0, _100910, [], _101850)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _100910, [], _101850)
^  Unify: (261) [user] subst_vars(0, _100910, [], _101850)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _100910, [], _101850)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _100912, [], _54230)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _100912, [], _54230)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1398, 0], [1398, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0], [";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0], [], [])
   Call: (258) [system] compound_name_arguments(_54228, '$COMMENT', [";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT', [";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), [], [])
   Call: (257) [system] _124268=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(and True (let $x False $x))\"), Ok(vec![vec![expr!({Bool(false)})]]));", 1398, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1399, 0, 50394, '$COMMENT'(";;    }", 1399, 0), '$stream_position'(50394, 1399, 0, 50428)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1399, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1399, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    }", 1399, 0), _176986))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1399, 0), _176986))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    }", 1399, 0), _176986)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1399, 0), _176986)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1399, 0), _176986)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1399, 0), _176986)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    }", 1399, 0), _182598))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1399, 0), _182598))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1399, 0), _182598))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1399, 0), _182598))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1399, 0), _182598)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1399, 0), _182598)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    }", 1399, 0), _188184))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1399, 0), _188184))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    }", 1399, 0), _188184)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1399, 0), _188184)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1399, 0), _188184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1399, 0), _188184)
   Call: (270) [system] var('$COMMENT'(";;    }", 1399, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1399, 0), _188184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1399, 0), '$VAR'(_195644))
   Call: (270) [system] atom('$COMMENT'(";;    }", 1399, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1399, 0), _188184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1399, 0), _188184)
   Call: (270) [system] '$COMMENT'(";;    }", 1399, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1399, 0), _188184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1399, 0), _188184)
   Call: (270) [system] '$COMMENT'(";;    }", 1399, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1399, 0), _188184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1399, 0), _188184)
   Call: (270) [system] '$COMMENT'(";;    }", 1399, 0)==[_204924, _204930]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1399, 0), _188184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1399, 0), _188184)
   Call: (270) [system] is_list('$COMMENT'(";;    }", 1399, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1399, 0), _188184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1399, 0), _188184)
   Call: (270) [system] string('$COMMENT'(";;    }", 1399, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1399, 0), _188184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1399, 0), _188184)
   Call: (270) [system] compound('$COMMENT'(";;    }", 1399, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    }", 1399, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1399, 0), _215126, _215128)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1399, 0), '$COMMENT', [";;    }", 1399, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    }", 1399, 0], _218868)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1399, 0], _218868)
   Call: (271) [apply] apply:maplist_([";;    }", 1399, 0], _218868, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    }", 1399, 0], [_221686|_221688], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    }", _221686)
^  Unify: (272) [user] mfix_vars1(";;    }", _221686)
   Call: (273) [system] var(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _221686)
^  Unify: (272) [user] mfix_vars1(";;    }", '$VAR'(_226332))
   Call: (273) [system] atom(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _221686)
^  Unify: (272) [user] mfix_vars1(";;    }", _221686)
   Call: (273) [system] ";;    }"==true
^  Redo: (272) [user] mfix_vars1(";;    }", _221686)
^  Unify: (272) [user] mfix_vars1(";;    }", _221686)
   Call: (273) [system] ";;    }"==false
^  Redo: (272) [user] mfix_vars1(";;    }", _221686)
^  Unify: (272) [user] mfix_vars1(";;    }", _221686)
   Call: (273) [system] ";;    }"==[_235612, _235618]
^  Redo: (272) [user] mfix_vars1(";;    }", _221686)
^  Unify: (272) [user] mfix_vars1(";;    }", _221686)
   Call: (273) [system] is_list(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _221686)
^  Unify: (272) [user] mfix_vars1(";;    }", _221686)
   Call: (273) [system] string(";;    }")
   Exit: (273) [system] string(";;    }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    }", _221686)
^  Unify: (272) [user] mfix_vars1(";;    }", _221686)
   Call: (273) [system] compound(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _221686)
^  Unify: (272) [user] mfix_vars1(";;    }", _221686)
^  Call: (273) [user] symbol(";;    }")
^  Unify: (273) [user] symbol(";;    }")
   Call: (274) [system] atom(";;    }")
   Fail: (274) [system] atom(";;    }")
^  Fail: (273) [user] symbol(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _221686)
   Call: (273) [system] ";;    }"=_221686
   Exit: (273) [system] ";;    }"=";;    }"
^  Exit: (272) [user] mfix_vars1(";;    }", ";;    }")
   Call: (272) [apply] apply:maplist_([1399, 0], _221688, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1399, 0], [_259684|_259686], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1399, _259684)
^  Unify: (273) [user] mfix_vars1(1399, _259684)
   Call: (274) [system] var(1399)
^  Redo: (273) [user] mfix_vars1(1399, _259684)
^  Unify: (273) [user] mfix_vars1(1399, '$VAR'(_264330))
   Call: (274) [system] atom(1399)
^  Redo: (273) [user] mfix_vars1(1399, _259684)
^  Unify: (273) [user] mfix_vars1(1399, _259684)
   Call: (274) [system] 1399==true
^  Redo: (273) [user] mfix_vars1(1399, _259684)
^  Unify: (273) [user] mfix_vars1(1399, _259684)
   Call: (274) [system] 1399==false
^  Redo: (273) [user] mfix_vars1(1399, _259684)
^  Unify: (273) [user] mfix_vars1(1399, _259684)
   Call: (274) [system] 1399==[_273610, _273616]
^  Redo: (273) [user] mfix_vars1(1399, _259684)
^  Unify: (273) [user] mfix_vars1(1399, _259684)
   Call: (274) [system] is_list(1399)
^  Redo: (273) [user] mfix_vars1(1399, _259684)
^  Unify: (273) [user] mfix_vars1(1399, _259684)
   Call: (274) [system] string(1399)
^  Redo: (273) [user] mfix_vars1(1399, _259684)
^  Unify: (273) [user] mfix_vars1(1399, _259684)
   Call: (274) [system] compound(1399)
^  Redo: (273) [user] mfix_vars1(1399, _259684)
^  Unify: (273) [user] mfix_vars1(1399, _259684)
^  Call: (274) [user] symbol(1399)
^  Unify: (274) [user] symbol(1399)
   Call: (275) [system] atom(1399)
   Fail: (275) [system] atom(1399)
^  Fail: (274) [user] symbol(1399)
^  Redo: (273) [user] mfix_vars1(1399, _259684)
   Call: (274) [system] 1399=_259684
   Exit: (274) [system] 1399=1399
^  Exit: (273) [user] mfix_vars1(1399, 1399)
   Call: (273) [apply] apply:maplist_([0], _259686, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_294010|_294012], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _294010)
^  Unify: (274) [user] mfix_vars1(0, _294010)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _294010)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_298656))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _294010)
^  Unify: (274) [user] mfix_vars1(0, _294010)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _294010)
^  Unify: (274) [user] mfix_vars1(0, _294010)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _294010)
^  Unify: (274) [user] mfix_vars1(0, _294010)
   Call: (275) [system] 0==[_307936, _307942]
^  Redo: (274) [user] mfix_vars1(0, _294010)
^  Unify: (274) [user] mfix_vars1(0, _294010)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _294010)
^  Unify: (274) [user] mfix_vars1(0, _294010)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _294010)
^  Unify: (274) [user] mfix_vars1(0, _294010)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _294010)
^  Unify: (274) [user] mfix_vars1(0, _294010)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _294010)
   Call: (275) [system] 0=_294010
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _294012, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1399, 0], [1399, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    }", 1399, 0], [";;    }", 1399, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1399, 0], [";;    }", 1399, 0])
   Call: (270) [system] compound_name_arguments(_188184, '$COMMENT', [";;    }", 1399, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1399, 0), '$COMMENT', [";;    }", 1399, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1399, 0)\=@='$COMMENT'(";;    }", 1399, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1399, 0), _182598)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    }", 1399, 0), _344184))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1399, 0), _344184))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1399, 0), _344184))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1399, 0), _344184))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1399, 0), _344184)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1399, 0), _344184)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    }", 1399, 0), _349770))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1399, 0), _349770))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    }", 1399, 0), _349770)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1399, 0), _349770)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    }", 1399, 0), _349770)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1399, 0)\=@='$COMMENT'(";;    }", 1399, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1399, 0), _344184)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    }", 1399, 0), _176986))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1399, 0), _176986))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1399, 0), _176986))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1399, 0), _176986))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1399, 0), _176986)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1399, 0), _176986)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    }", 1399, 0), _372090))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1399, 0), _372090))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    }", 1399, 0), _372090)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1399, 0), _372090)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    }", 1399, 0), _372090)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1399, 0)\=@='$COMMENT'(";;    }", 1399, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1399, 0), _176986)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0)))
   Call: (261) [system] '$COMMENT'(";;    }", 1399, 0)\=@='$COMMENT'(";;    }", 1399, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1399, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1399, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1399, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1399, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1399, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    }", 1399, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    }", 1399, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    }", 1399, 0), _400868, [], _400870)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    }", 1399, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1399, 0), _400868, [], _400870)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1399, 0), _400868, [], _400870)
   Call: (258) [system] atom('$COMMENT'(";;    }", 1399, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1399, 0), _400868, [], _400870)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1399, 0), _400868, [], _400870)
   Call: (258) [system] compound('$COMMENT'(";;    }", 1399, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    }", 1399, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1399, 0), _410184, _410186)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1399, 0), '$COMMENT', [";;    }", 1399, 0])
^  Call: (258) [user] subst_vars([";;    }", 1399, 0], _412070, [], _400870)
^  Unify: (258) [user] subst_vars([";;    }", 1399, 0], [";;    }", 1399, 0], [], [])
   Call: (259) [system] var([";;    }", 1399, 0])
^  Redo: (258) [user] subst_vars([";;    }", 1399, 0], _412070, [], _400870)
^  Unify: (258) [user] subst_vars([";;    }", 1399, 0], [_415806|_415808], [], _400870)
^  Call: (259) [user] subst_vars(";;    }", _415806, [], _416746)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
   Call: (260) [system] var(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _415806, [], _416746)
^  Unify: (259) [user] subst_vars(";;    }", _415806, [], _416746)
   Call: (260) [system] atom(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _415806, [], _416746)
^  Unify: (259) [user] subst_vars(";;    }", _415806, [], _416746)
   Call: (260) [system] compound(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _415806, [], _416746)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Exit: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Call: (259) [user] subst_vars([1399, 0], _415808, [], _400870)
^  Unify: (259) [user] subst_vars([1399, 0], [1399, 0], [], [])
   Call: (260) [system] var([1399, 0])
^  Redo: (259) [user] subst_vars([1399, 0], _415808, [], _400870)
^  Unify: (259) [user] subst_vars([1399, 0], [_431678|_431680], [], _400870)
^  Call: (260) [user] subst_vars(1399, _431678, [], _432618)
^  Unify: (260) [user] subst_vars(1399, 1399, [], [])
   Call: (261) [system] var(1399)
^  Redo: (260) [user] subst_vars(1399, _431678, [], _432618)
^  Unify: (260) [user] subst_vars(1399, _431678, [], _432618)
   Call: (261) [system] atom(1399)
^  Redo: (260) [user] subst_vars(1399, _431678, [], _432618)
^  Unify: (260) [user] subst_vars(1399, _431678, [], _432618)
   Call: (261) [system] compound(1399)
^  Redo: (260) [user] subst_vars(1399, _431678, [], _432618)
^  Unify: (260) [user] subst_vars(1399, 1399, [], [])
^  Exit: (260) [user] subst_vars(1399, 1399, [], [])
^  Call: (260) [user] subst_vars([0], _431680, [], _400870)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _431680, [], _400870)
^  Unify: (260) [user] subst_vars([0], [_447550|_447552], [], _400870)
^  Call: (261) [user] subst_vars(0, _447550, [], _448490)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _447550, [], _448490)
^  Unify: (261) [user] subst_vars(0, _447550, [], _448490)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _447550, [], _448490)
^  Unify: (261) [user] subst_vars(0, _447550, [], _448490)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _447550, [], _448490)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _447552, [], _400870)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _447552, [], _400870)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1399, 0], [1399, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    }", 1399, 0], [";;    }", 1399, 0], [], [])
   Call: (258) [system] compound_name_arguments(_400868, '$COMMENT', [";;    }", 1399, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1399, 0), '$COMMENT', [";;    }", 1399, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    }", 1399, 0), '$COMMENT'(";;    }", 1399, 0), [], [])
   Call: (257) [system] _470908=metta_file_buffer(+, '$COMMENT'(";;    }", 1399, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    }", 1399, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    }", 1399, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1399, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1399, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1399, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1399, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1399, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1399, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1400, 0, 50402, '$COMMENT'(";; Converted:", 1400, 0), '$stream_position'(50402, 1400, 0, 50436)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1400, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1400, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1400, 0), _5946))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1400, 0), _5946))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1400, 0), _5946)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1400, 0), _5946)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1400, 0), _5946)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1400, 0), _5946)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1400, 0), _11250))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1400, 0), _11250))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1400, 0), _11250))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1400, 0), _11250))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1400, 0), _11250)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1400, 0), _11250)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1400, 0), _16836))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1400, 0), _16836))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1400, 0), _16836)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1400, 0), _16836)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1400, 0), _16836)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1400, 0), _16836)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1400, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1400, 0), _16836)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1400, 0), '$VAR'(_24296))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1400, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1400, 0), _16836)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1400, 0), _16836)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1400, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1400, 0), _16836)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1400, 0), _16836)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1400, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1400, 0), _16836)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1400, 0), _16836)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1400, 0)==[_33576, _33582]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1400, 0), _16836)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1400, 0), _16836)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1400, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1400, 0), _16836)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1400, 0), _16836)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1400, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1400, 0), _16836)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1400, 0), _16836)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1400, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1400, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1400, 0), _43778, _43780)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1400, 0), '$COMMENT', [";; Converted:", 1400, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1400, 0], _47520)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1400, 0], _47520)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1400, 0], _47520, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1400, 0], [_50338|_50340], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _50338)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _50338)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _50338)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_54984))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _50338)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _50338)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _50338)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _50338)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _50338)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _50338)
   Call: (273) [system] ";; Converted:"==[_64264, _64270]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _50338)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _50338)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _50338)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _50338)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _50338)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _50338)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _50338)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _50338)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _50338)
   Call: (273) [system] ";; Converted:"=_50338
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1400, 0], _50340, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1400, 0], [_88336|_88338], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1400, _88336)
^  Unify: (273) [user] mfix_vars1(1400, _88336)
   Call: (274) [system] var(1400)
^  Redo: (273) [user] mfix_vars1(1400, _88336)
^  Unify: (273) [user] mfix_vars1(1400, '$VAR'(_92982))
   Call: (274) [system] atom(1400)
^  Redo: (273) [user] mfix_vars1(1400, _88336)
^  Unify: (273) [user] mfix_vars1(1400, _88336)
   Call: (274) [system] 1400==true
^  Redo: (273) [user] mfix_vars1(1400, _88336)
^  Unify: (273) [user] mfix_vars1(1400, _88336)
   Call: (274) [system] 1400==false
^  Redo: (273) [user] mfix_vars1(1400, _88336)
^  Unify: (273) [user] mfix_vars1(1400, _88336)
   Call: (274) [system] 1400==[_102262, _102268]
^  Redo: (273) [user] mfix_vars1(1400, _88336)
^  Unify: (273) [user] mfix_vars1(1400, _88336)
   Call: (274) [system] is_list(1400)
^  Redo: (273) [user] mfix_vars1(1400, _88336)
^  Unify: (273) [user] mfix_vars1(1400, _88336)
   Call: (274) [system] string(1400)
^  Redo: (273) [user] mfix_vars1(1400, _88336)
^  Unify: (273) [user] mfix_vars1(1400, _88336)
   Call: (274) [system] compound(1400)
^  Redo: (273) [user] mfix_vars1(1400, _88336)
^  Unify: (273) [user] mfix_vars1(1400, _88336)
^  Call: (274) [user] symbol(1400)
^  Unify: (274) [user] symbol(1400)
   Call: (275) [system] atom(1400)
   Fail: (275) [system] atom(1400)
^  Fail: (274) [user] symbol(1400)
^  Redo: (273) [user] mfix_vars1(1400, _88336)
   Call: (274) [system] 1400=_88336
   Exit: (274) [system] 1400=1400
^  Exit: (273) [user] mfix_vars1(1400, 1400)
   Call: (273) [apply] apply:maplist_([0], _88338, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_122662|_122664], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _122662)
^  Unify: (274) [user] mfix_vars1(0, _122662)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _122662)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_127308))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _122662)
^  Unify: (274) [user] mfix_vars1(0, _122662)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _122662)
^  Unify: (274) [user] mfix_vars1(0, _122662)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _122662)
^  Unify: (274) [user] mfix_vars1(0, _122662)
   Call: (275) [system] 0==[_136588, _136594]
^  Redo: (274) [user] mfix_vars1(0, _122662)
^  Unify: (274) [user] mfix_vars1(0, _122662)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _122662)
^  Unify: (274) [user] mfix_vars1(0, _122662)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _122662)
^  Unify: (274) [user] mfix_vars1(0, _122662)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _122662)
^  Unify: (274) [user] mfix_vars1(0, _122662)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _122662)
   Call: (275) [system] 0=_122662
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _122664, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1400, 0], [1400, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1400, 0], [";; Converted:", 1400, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1400, 0], [";; Converted:", 1400, 0])
   Call: (270) [system] compound_name_arguments(_16836, '$COMMENT', [";; Converted:", 1400, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1400, 0), '$COMMENT', [";; Converted:", 1400, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1400, 0)\=@='$COMMENT'(";; Converted:", 1400, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1400, 0), _11250)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1400, 0), _172836))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1400, 0), _172836))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1400, 0), _172836))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1400, 0), _172836))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1400, 0), _172836)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1400, 0), _172836)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1400, 0), _178422))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1400, 0), _178422))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1400, 0), _178422)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1400, 0), _178422)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1400, 0), _178422)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1400, 0)\=@='$COMMENT'(";; Converted:", 1400, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1400, 0), _172836)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1400, 0), _5946))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1400, 0), _5946))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1400, 0), _5946))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1400, 0), _5946))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1400, 0), _5946)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1400, 0), _5946)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1400, 0), _200742))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1400, 0), _200742))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1400, 0), _200742)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1400, 0), _200742)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1400, 0), _200742)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1400, 0)\=@='$COMMENT'(";; Converted:", 1400, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1400, 0), _5946)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1400, 0)\=@='$COMMENT'(";; Converted:", 1400, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1400, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1400, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1400, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1400, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1400, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1400, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1400, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1400, 0), _229520, [], _229522)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1400, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1400, 0), _229520, [], _229522)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1400, 0), _229520, [], _229522)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1400, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1400, 0), _229520, [], _229522)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1400, 0), _229520, [], _229522)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1400, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1400, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1400, 0), _238836, _238838)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1400, 0), '$COMMENT', [";; Converted:", 1400, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1400, 0], _240722, [], _229522)
^  Unify: (258) [user] subst_vars([";; Converted:", 1400, 0], [";; Converted:", 1400, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1400, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1400, 0], _240722, [], _229522)
^  Unify: (258) [user] subst_vars([";; Converted:", 1400, 0], [_244458|_244460], [], _229522)
^  Call: (259) [user] subst_vars(";; Converted:", _244458, [], _245398)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _244458, [], _245398)
^  Unify: (259) [user] subst_vars(";; Converted:", _244458, [], _245398)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _244458, [], _245398)
^  Unify: (259) [user] subst_vars(";; Converted:", _244458, [], _245398)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _244458, [], _245398)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1400, 0], _244460, [], _229522)
^  Unify: (259) [user] subst_vars([1400, 0], [1400, 0], [], [])
   Call: (260) [system] var([1400, 0])
^  Redo: (259) [user] subst_vars([1400, 0], _244460, [], _229522)
^  Unify: (259) [user] subst_vars([1400, 0], [_260330|_260332], [], _229522)
^  Call: (260) [user] subst_vars(1400, _260330, [], _261270)
^  Unify: (260) [user] subst_vars(1400, 1400, [], [])
   Call: (261) [system] var(1400)
^  Redo: (260) [user] subst_vars(1400, _260330, [], _261270)
^  Unify: (260) [user] subst_vars(1400, _260330, [], _261270)
   Call: (261) [system] atom(1400)
^  Redo: (260) [user] subst_vars(1400, _260330, [], _261270)
^  Unify: (260) [user] subst_vars(1400, _260330, [], _261270)
   Call: (261) [system] compound(1400)
^  Redo: (260) [user] subst_vars(1400, _260330, [], _261270)
^  Unify: (260) [user] subst_vars(1400, 1400, [], [])
^  Exit: (260) [user] subst_vars(1400, 1400, [], [])
^  Call: (260) [user] subst_vars([0], _260332, [], _229522)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _260332, [], _229522)
^  Unify: (260) [user] subst_vars([0], [_276202|_276204], [], _229522)
^  Call: (261) [user] subst_vars(0, _276202, [], _277142)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _276202, [], _277142)
^  Unify: (261) [user] subst_vars(0, _276202, [], _277142)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _276202, [], _277142)
^  Unify: (261) [user] subst_vars(0, _276202, [], _277142)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _276202, [], _277142)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _276204, [], _229522)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _276204, [], _229522)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1400, 0], [1400, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1400, 0], [";; Converted:", 1400, 0], [], [])
   Call: (258) [system] compound_name_arguments(_229520, '$COMMENT', [";; Converted:", 1400, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1400, 0), '$COMMENT', [";; Converted:", 1400, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1400, 0), '$COMMENT'(";; Converted:", 1400, 0), [], [])
   Call: (257) [system] _299560=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1400, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1400, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1400, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1400, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1400, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1400, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1400, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1400, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1400, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1404, 0, 50478, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$stream_position'(50478, 1404, 0, 50512)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _352284))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _352284))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _352284)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _352284)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _352284)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _352284)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _357896))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _357896))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _357896))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _357896))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _357896)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _357896)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _363482))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _363482))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _363482)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _363482)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _363482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _363482)
   Call: (270) [system] var('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _363482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$VAR'(_370942))
   Call: (270) [system] atom('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _363482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _363482)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _363482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _363482)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _363482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _363482)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0)==[_380222, _380228]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _363482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _363482)
   Call: (270) [system] is_list('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _363482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _363482)
   Call: (270) [system] string('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _363482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _363482)
   Call: (270) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
   Exit: (270) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _390424, _390426)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0], _394166)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0], _394166)
   Call: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0], _394166, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0], [_396984|_396986], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _396984)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _396984)
   Call: (273) [system] var(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _396984)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", '$VAR'(_401630))
   Call: (273) [system] atom(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _396984)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _396984)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"==true
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _396984)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _396984)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"==false
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _396984)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _396984)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"==[_410910, _410916]
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _396984)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _396984)
   Call: (273) [system] is_list(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _396984)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _396984)
   Call: (273) [system] string(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Exit: (273) [system] string(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _396984)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _396984)
   Call: (273) [system] compound(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _396984)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _396984)
^  Call: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Unify: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Call: (274) [system] atom(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Fail: (274) [system] atom(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Fail: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _396984)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"=_396984
   Exit: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"=";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"
^  Exit: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Call: (272) [apply] apply:maplist_([1404, 0], _396986, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1404, 0], [_434982|_434984], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1404, _434982)
^  Unify: (273) [user] mfix_vars1(1404, _434982)
   Call: (274) [system] var(1404)
^  Redo: (273) [user] mfix_vars1(1404, _434982)
^  Unify: (273) [user] mfix_vars1(1404, '$VAR'(_439628))
   Call: (274) [system] atom(1404)
^  Redo: (273) [user] mfix_vars1(1404, _434982)
^  Unify: (273) [user] mfix_vars1(1404, _434982)
   Call: (274) [system] 1404==true
^  Redo: (273) [user] mfix_vars1(1404, _434982)
^  Unify: (273) [user] mfix_vars1(1404, _434982)
   Call: (274) [system] 1404==false
^  Redo: (273) [user] mfix_vars1(1404, _434982)
^  Unify: (273) [user] mfix_vars1(1404, _434982)
   Call: (274) [system] 1404==[_448908, _448914]
^  Redo: (273) [user] mfix_vars1(1404, _434982)
^  Unify: (273) [user] mfix_vars1(1404, _434982)
   Call: (274) [system] is_list(1404)
^  Redo: (273) [user] mfix_vars1(1404, _434982)
^  Unify: (273) [user] mfix_vars1(1404, _434982)
   Call: (274) [system] string(1404)
^  Redo: (273) [user] mfix_vars1(1404, _434982)
^  Unify: (273) [user] mfix_vars1(1404, _434982)
   Call: (274) [system] compound(1404)
^  Redo: (273) [user] mfix_vars1(1404, _434982)
^  Unify: (273) [user] mfix_vars1(1404, _434982)
^  Call: (274) [user] symbol(1404)
^  Unify: (274) [user] symbol(1404)
   Call: (275) [system] atom(1404)
   Fail: (275) [system] atom(1404)
^  Fail: (274) [user] symbol(1404)
^  Redo: (273) [user] mfix_vars1(1404, _434982)
   Call: (274) [system] 1404=_434982
   Exit: (274) [system] 1404=1404
^  Exit: (273) [user] mfix_vars1(1404, 1404)
   Call: (273) [apply] apply:maplist_([0], _434984, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_469308|_469310], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _469308)
^  Unify: (274) [user] mfix_vars1(0, _469308)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _469308)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_473954))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _469308)
^  Unify: (274) [user] mfix_vars1(0, _469308)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _469308)
^  Unify: (274) [user] mfix_vars1(0, _469308)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _469308)
^  Unify: (274) [user] mfix_vars1(0, _469308)
   Call: (275) [system] 0==[_483234, _483240]
^  Redo: (274) [user] mfix_vars1(0, _469308)
^  Unify: (274) [user] mfix_vars1(0, _469308)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _469308)
^  Unify: (274) [user] mfix_vars1(0, _469308)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _469308)
^  Unify: (274) [user] mfix_vars1(0, _469308)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _469308)
^  Unify: (274) [user] mfix_vars1(0, _469308)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _469308)
   Call: (275) [system] 0=_469308
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _469310, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1404, 0], [1404, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0], [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0], [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0])
   Call: (270) [system] compound_name_arguments(_363482, '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _357896)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _519482))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _519482))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _519482))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _519482))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _519482)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _5972)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _6882))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _6882))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _6882)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _6882)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _6882)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _5972)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _29202))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _29202))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _29202)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _29202)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _29202)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0)))
   Call: (261) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _57980, [], _57982)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _57980, [], _57982)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _57980, [], _57982)
   Call: (258) [system] atom('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _57980, [], _57982)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _57980, [], _57982)
   Call: (258) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
   Exit: (258) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), _67296, _67298)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0])
^  Call: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0], _69182, [], _57982)
^  Unify: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0], [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0], [], [])
   Call: (259) [system] var([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0])
^  Redo: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0], _69182, [], _57982)
^  Unify: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0], [_72918|_72920], [], _57982)
^  Call: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _72918, [], _73858)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", [], [])
   Call: (260) [system] var(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _72918, [], _73858)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _72918, [], _73858)
   Call: (260) [system] atom(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _72918, [], _73858)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _72918, [], _73858)
   Call: (260) [system] compound(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _72918, [], _73858)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", [], [])
^  Exit: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", [], [])
^  Call: (259) [user] subst_vars([1404, 0], _72920, [], _57982)
^  Unify: (259) [user] subst_vars([1404, 0], [1404, 0], [], [])
   Call: (260) [system] var([1404, 0])
^  Redo: (259) [user] subst_vars([1404, 0], _72920, [], _57982)
^  Unify: (259) [user] subst_vars([1404, 0], [_88790|_88792], [], _57982)
^  Call: (260) [user] subst_vars(1404, _88790, [], _89730)
^  Unify: (260) [user] subst_vars(1404, 1404, [], [])
   Call: (261) [system] var(1404)
^  Redo: (260) [user] subst_vars(1404, _88790, [], _89730)
^  Unify: (260) [user] subst_vars(1404, _88790, [], _89730)
   Call: (261) [system] atom(1404)
^  Redo: (260) [user] subst_vars(1404, _88790, [], _89730)
^  Unify: (260) [user] subst_vars(1404, _88790, [], _89730)
   Call: (261) [system] compound(1404)
^  Redo: (260) [user] subst_vars(1404, _88790, [], _89730)
^  Unify: (260) [user] subst_vars(1404, 1404, [], [])
^  Exit: (260) [user] subst_vars(1404, 1404, [], [])
^  Call: (260) [user] subst_vars([0], _88792, [], _57982)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _88792, [], _57982)
^  Unify: (260) [user] subst_vars([0], [_104662|_104664], [], _57982)
^  Call: (261) [user] subst_vars(0, _104662, [], _105602)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _104662, [], _105602)
^  Unify: (261) [user] subst_vars(0, _104662, [], _105602)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _104662, [], _105602)
^  Unify: (261) [user] subst_vars(0, _104662, [], _105602)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _104662, [], _105602)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _104664, [], _57982)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _104664, [], _57982)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1404, 0], [1404, 0], [], [])
^  Exit: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0], [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0], [], [])
   Call: (258) [system] compound_name_arguments(_57980, '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), [], [])
   Call: (257) [system] _128020=metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1404, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1405, 0, 50512, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$stream_position'(50512, 1405, 0, 50546)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _180746))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _180746))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _180746)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _180746)
^  Call: (263) [user] untyped_to_metta('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _180746)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _180746)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _186358))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _186358))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _186358))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _186358))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _186358)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _186358)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _191944))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _191944))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _191944)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _191944)
^  Call: (269) [user] mfix_vars1('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _191944)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _191944)
   Call: (270) [system] var('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _191944)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$VAR'(_199404))
   Call: (270) [system] atom('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _191944)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _191944)
   Call: (270) [system] '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _191944)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _191944)
   Call: (270) [system] '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _191944)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _191944)
   Call: (270) [system] '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0)==[_208684, _208690]
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _191944)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _191944)
   Call: (270) [system] is_list('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _191944)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _191944)
   Call: (270) [system] string('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _191944)
^  Unify: (269) [user] mfix_vars1('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _191944)
   Call: (270) [system] compound('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
   Exit: (270) [system] compound('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _218886, _218888)
   Exit: (270) [system] compound_name_arguments('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT', ["; Converted Rust Tests with Original Source", 1405, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, ["; Converted Rust Tests with Original Source", 1405, 0], _222628)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, ["; Converted Rust Tests with Original Source", 1405, 0], _222628)
   Call: (271) [apply] apply:maplist_(["; Converted Rust Tests with Original Source", 1405, 0], _222628, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_(["; Converted Rust Tests with Original Source", 1405, 0], [_225446|_225448], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1("; Converted Rust Tests with Original Source", _225446)
^  Unify: (272) [user] mfix_vars1("; Converted Rust Tests with Original Source", _225446)
   Call: (273) [system] var("; Converted Rust Tests with Original Source")
^  Redo: (272) [user] mfix_vars1("; Converted Rust Tests with Original Source", _225446)
^  Unify: (272) [user] mfix_vars1("; Converted Rust Tests with Original Source", '$VAR'(_230092))
   Call: (273) [system] atom("; Converted Rust Tests with Original Source")
^  Redo: (272) [user] mfix_vars1("; Converted Rust Tests with Original Source", _225446)
^  Unify: (272) [user] mfix_vars1("; Converted Rust Tests with Original Source", _225446)
   Call: (273) [system] "; Converted Rust Tests with Original Source"==true
^  Redo: (272) [user] mfix_vars1("; Converted Rust Tests with Original Source", _225446)
^  Unify: (272) [user] mfix_vars1("; Converted Rust Tests with Original Source", _225446)
   Call: (273) [system] "; Converted Rust Tests with Original Source"==false
^  Redo: (272) [user] mfix_vars1("; Converted Rust Tests with Original Source", _225446)
^  Unify: (272) [user] mfix_vars1("; Converted Rust Tests with Original Source", _225446)
   Call: (273) [system] "; Converted Rust Tests with Original Source"==[_239372, _239378]
^  Redo: (272) [user] mfix_vars1("; Converted Rust Tests with Original Source", _225446)
^  Unify: (272) [user] mfix_vars1("; Converted Rust Tests with Original Source", _225446)
   Call: (273) [system] is_list("; Converted Rust Tests with Original Source")
^  Redo: (272) [user] mfix_vars1("; Converted Rust Tests with Original Source", _225446)
^  Unify: (272) [user] mfix_vars1("; Converted Rust Tests with Original Source", _225446)
   Call: (273) [system] string("; Converted Rust Tests with Original Source")
   Exit: (273) [system] string("; Converted Rust Tests with Original Source")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1("; Converted Rust Tests with Original Source", _225446)
^  Unify: (272) [user] mfix_vars1("; Converted Rust Tests with Original Source", _225446)
   Call: (273) [system] compound("; Converted Rust Tests with Original Source")
^  Redo: (272) [user] mfix_vars1("; Converted Rust Tests with Original Source", _225446)
^  Unify: (272) [user] mfix_vars1("; Converted Rust Tests with Original Source", _225446)
^  Call: (273) [user] symbol("; Converted Rust Tests with Original Source")
^  Unify: (273) [user] symbol("; Converted Rust Tests with Original Source")
   Call: (274) [system] atom("; Converted Rust Tests with Original Source")
   Fail: (274) [system] atom("; Converted Rust Tests with Original Source")
^  Fail: (273) [user] symbol("; Converted Rust Tests with Original Source")
^  Redo: (272) [user] mfix_vars1("; Converted Rust Tests with Original Source", _225446)
   Call: (273) [system] "; Converted Rust Tests with Original Source"=_225446
   Exit: (273) [system] "; Converted Rust Tests with Original Source"="; Converted Rust Tests with Original Source"
^  Exit: (272) [user] mfix_vars1("; Converted Rust Tests with Original Source", "; Converted Rust Tests with Original Source")
   Call: (272) [apply] apply:maplist_([1405, 0], _225448, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1405, 0], [_263444|_263446], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1405, _263444)
^  Unify: (273) [user] mfix_vars1(1405, _263444)
   Call: (274) [system] var(1405)
^  Redo: (273) [user] mfix_vars1(1405, _263444)
^  Unify: (273) [user] mfix_vars1(1405, '$VAR'(_268090))
   Call: (274) [system] atom(1405)
^  Redo: (273) [user] mfix_vars1(1405, _263444)
^  Unify: (273) [user] mfix_vars1(1405, _263444)
   Call: (274) [system] 1405==true
^  Redo: (273) [user] mfix_vars1(1405, _263444)
^  Unify: (273) [user] mfix_vars1(1405, _263444)
   Call: (274) [system] 1405==false
^  Redo: (273) [user] mfix_vars1(1405, _263444)
^  Unify: (273) [user] mfix_vars1(1405, _263444)
   Call: (274) [system] 1405==[_277370, _277376]
^  Redo: (273) [user] mfix_vars1(1405, _263444)
^  Unify: (273) [user] mfix_vars1(1405, _263444)
   Call: (274) [system] is_list(1405)
^  Redo: (273) [user] mfix_vars1(1405, _263444)
^  Unify: (273) [user] mfix_vars1(1405, _263444)
   Call: (274) [system] string(1405)
^  Redo: (273) [user] mfix_vars1(1405, _263444)
^  Unify: (273) [user] mfix_vars1(1405, _263444)
   Call: (274) [system] compound(1405)
^  Redo: (273) [user] mfix_vars1(1405, _263444)
^  Unify: (273) [user] mfix_vars1(1405, _263444)
^  Call: (274) [user] symbol(1405)
^  Unify: (274) [user] symbol(1405)
   Call: (275) [system] atom(1405)
   Fail: (275) [system] atom(1405)
^  Fail: (274) [user] symbol(1405)
^  Redo: (273) [user] mfix_vars1(1405, _263444)
   Call: (274) [system] 1405=_263444
   Exit: (274) [system] 1405=1405
^  Exit: (273) [user] mfix_vars1(1405, 1405)
   Call: (273) [apply] apply:maplist_([0], _263446, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_297770|_297772], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _297770)
^  Unify: (274) [user] mfix_vars1(0, _297770)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _297770)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_302416))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _297770)
^  Unify: (274) [user] mfix_vars1(0, _297770)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _297770)
^  Unify: (274) [user] mfix_vars1(0, _297770)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _297770)
^  Unify: (274) [user] mfix_vars1(0, _297770)
   Call: (275) [system] 0==[_311696, _311702]
^  Redo: (274) [user] mfix_vars1(0, _297770)
^  Unify: (274) [user] mfix_vars1(0, _297770)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _297770)
^  Unify: (274) [user] mfix_vars1(0, _297770)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _297770)
^  Unify: (274) [user] mfix_vars1(0, _297770)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _297770)
^  Unify: (274) [user] mfix_vars1(0, _297770)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _297770)
   Call: (275) [system] 0=_297770
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _297772, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1405, 0], [1405, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_(["; Converted Rust Tests with Original Source", 1405, 0], ["; Converted Rust Tests with Original Source", 1405, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, ["; Converted Rust Tests with Original Source", 1405, 0], ["; Converted Rust Tests with Original Source", 1405, 0])
   Call: (270) [system] compound_name_arguments(_191944, '$COMMENT', ["; Converted Rust Tests with Original Source", 1405, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT', ["; Converted Rust Tests with Original Source", 1405, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0)))
   Call: (267) [system] '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0)\=@='$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _186358)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _347944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _347944))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _347944))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _347944))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _347944)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _347944)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _353530))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _353530))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _353530)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _353530)
^  Call: (269) [user] cons_to_c('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _353530)
^  Unify: (269) [user] cons_to_c('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0)))
   Call: (267) [system] '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0)\=@='$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _347944)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _180746))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _180746))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _180746))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _180746))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _180746)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _180746)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _375850))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _375850))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _375850)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _375850)
^  Call: (269) [user] cons_to_l('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _375850)
^  Unify: (269) [user] cons_to_l('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0)))
   Call: (267) [system] '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0)\=@='$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _180746)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0)))
   Call: (261) [system] '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0)\=@='$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Call: (257) [user] subst_vars('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _404628, [], _404630)
^  Unify: (257) [user] subst_vars('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), [], [])
   Call: (258) [system] var('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _404628, [], _404630)
^  Unify: (257) [user] subst_vars('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _404628, [], _404630)
   Call: (258) [system] atom('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _404628, [], _404630)
^  Unify: (257) [user] subst_vars('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _404628, [], _404630)
   Call: (258) [system] compound('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
   Exit: (258) [system] compound('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), _413944, _413946)
   Exit: (258) [system] compound_name_arguments('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT', ["; Converted Rust Tests with Original Source", 1405, 0])
^  Call: (258) [user] subst_vars(["; Converted Rust Tests with Original Source", 1405, 0], _415830, [], _404630)
^  Unify: (258) [user] subst_vars(["; Converted Rust Tests with Original Source", 1405, 0], ["; Converted Rust Tests with Original Source", 1405, 0], [], [])
   Call: (259) [system] var(["; Converted Rust Tests with Original Source", 1405, 0])
^  Redo: (258) [user] subst_vars(["; Converted Rust Tests with Original Source", 1405, 0], _415830, [], _404630)
^  Unify: (258) [user] subst_vars(["; Converted Rust Tests with Original Source", 1405, 0], [_419566|_419568], [], _404630)
^  Call: (259) [user] subst_vars("; Converted Rust Tests with Original Source", _419566, [], _420506)
^  Unify: (259) [user] subst_vars("; Converted Rust Tests with Original Source", "; Converted Rust Tests with Original Source", [], [])
   Call: (260) [system] var("; Converted Rust Tests with Original Source")
^  Redo: (259) [user] subst_vars("; Converted Rust Tests with Original Source", _419566, [], _420506)
^  Unify: (259) [user] subst_vars("; Converted Rust Tests with Original Source", _419566, [], _420506)
   Call: (260) [system] atom("; Converted Rust Tests with Original Source")
^  Redo: (259) [user] subst_vars("; Converted Rust Tests with Original Source", _419566, [], _420506)
^  Unify: (259) [user] subst_vars("; Converted Rust Tests with Original Source", _419566, [], _420506)
   Call: (260) [system] compound("; Converted Rust Tests with Original Source")
^  Redo: (259) [user] subst_vars("; Converted Rust Tests with Original Source", _419566, [], _420506)
^  Unify: (259) [user] subst_vars("; Converted Rust Tests with Original Source", "; Converted Rust Tests with Original Source", [], [])
^  Exit: (259) [user] subst_vars("; Converted Rust Tests with Original Source", "; Converted Rust Tests with Original Source", [], [])
^  Call: (259) [user] subst_vars([1405, 0], _419568, [], _404630)
^  Unify: (259) [user] subst_vars([1405, 0], [1405, 0], [], [])
   Call: (260) [system] var([1405, 0])
^  Redo: (259) [user] subst_vars([1405, 0], _419568, [], _404630)
^  Unify: (259) [user] subst_vars([1405, 0], [_435438|_435440], [], _404630)
^  Call: (260) [user] subst_vars(1405, _435438, [], _436378)
^  Unify: (260) [user] subst_vars(1405, 1405, [], [])
   Call: (261) [system] var(1405)
^  Redo: (260) [user] subst_vars(1405, _435438, [], _436378)
^  Unify: (260) [user] subst_vars(1405, _435438, [], _436378)
   Call: (261) [system] atom(1405)
^  Redo: (260) [user] subst_vars(1405, _435438, [], _436378)
^  Unify: (260) [user] subst_vars(1405, _435438, [], _436378)
   Call: (261) [system] compound(1405)
^  Redo: (260) [user] subst_vars(1405, _435438, [], _436378)
^  Unify: (260) [user] subst_vars(1405, 1405, [], [])
^  Exit: (260) [user] subst_vars(1405, 1405, [], [])
^  Call: (260) [user] subst_vars([0], _435440, [], _404630)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _435440, [], _404630)
^  Unify: (260) [user] subst_vars([0], [_451310|_451312], [], _404630)
^  Call: (261) [user] subst_vars(0, _451310, [], _452250)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _451310, [], _452250)
^  Unify: (261) [user] subst_vars(0, _451310, [], _452250)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _451310, [], _452250)
^  Unify: (261) [user] subst_vars(0, _451310, [], _452250)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _451310, [], _452250)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _451312, [], _404630)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _451312, [], _404630)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1405, 0], [1405, 0], [], [])
^  Exit: (258) [user] subst_vars(["; Converted Rust Tests with Original Source", 1405, 0], ["; Converted Rust Tests with Original Source", 1405, 0], [], [])
   Call: (258) [system] compound_name_arguments(_404628, '$COMMENT', ["; Converted Rust Tests with Original Source", 1405, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT', ["; Converted Rust Tests with Original Source", 1405, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), [], [])
   Call: (257) [system] _474668=metta_file_buffer(+, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'("; Converted Rust Tests with Original Source", 1405, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1406, 0, 50556, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$stream_position'(50556, 1406, 0, 50590)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _9378))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _9378))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _9378)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _9378)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _9378)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _9378)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _14990))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _14990))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _14990))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _14990))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _14990)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _14990)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _20576))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _20576))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _20576)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _20576)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _20576)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _20576)
   Call: (270) [system] var('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _20576)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$VAR'(_28036))
   Call: (270) [system] atom('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _20576)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _20576)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _20576)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _20576)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _20576)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _20576)
   Call: (270) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0)==[_37316, _37322]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _20576)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _20576)
   Call: (270) [system] is_list('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _20576)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _20576)
   Call: (270) [system] string('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _20576)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _20576)
   Call: (270) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
   Exit: (270) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _47518, _47520)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0], _51260)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0], _51260)
   Call: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0], _51260, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0], [_54078|_54080], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _54078)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _54078)
   Call: (273) [system] var(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _54078)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", '$VAR'(_58724))
   Call: (273) [system] atom(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _54078)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _54078)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"==true
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _54078)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _54078)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"==false
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _54078)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _54078)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"==[_68004, _68010]
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _54078)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _54078)
   Call: (273) [system] is_list(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _54078)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _54078)
   Call: (273) [system] string(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Exit: (273) [system] string(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _54078)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _54078)
   Call: (273) [system] compound(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _54078)
^  Unify: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _54078)
^  Call: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Unify: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Call: (274) [system] atom(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Fail: (274) [system] atom(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Fail: (273) [user] symbol(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _54078)
   Call: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"=_54078
   Exit: (273) [system] ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"=";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"
^  Exit: (272) [user] mfix_vars1(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
   Call: (272) [apply] apply:maplist_([1406, 0], _54080, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1406, 0], [_92076|_92078], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1406, _92076)
^  Unify: (273) [user] mfix_vars1(1406, _92076)
   Call: (274) [system] var(1406)
^  Redo: (273) [user] mfix_vars1(1406, _92076)
^  Unify: (273) [user] mfix_vars1(1406, '$VAR'(_96722))
   Call: (274) [system] atom(1406)
^  Redo: (273) [user] mfix_vars1(1406, _92076)
^  Unify: (273) [user] mfix_vars1(1406, _92076)
   Call: (274) [system] 1406==true
^  Redo: (273) [user] mfix_vars1(1406, _92076)
^  Unify: (273) [user] mfix_vars1(1406, _92076)
   Call: (274) [system] 1406==false
^  Redo: (273) [user] mfix_vars1(1406, _92076)
^  Unify: (273) [user] mfix_vars1(1406, _92076)
   Call: (274) [system] 1406==[_106002, _106008]
^  Redo: (273) [user] mfix_vars1(1406, _92076)
^  Unify: (273) [user] mfix_vars1(1406, _92076)
   Call: (274) [system] is_list(1406)
^  Redo: (273) [user] mfix_vars1(1406, _92076)
^  Unify: (273) [user] mfix_vars1(1406, _92076)
   Call: (274) [system] string(1406)
^  Redo: (273) [user] mfix_vars1(1406, _92076)
^  Unify: (273) [user] mfix_vars1(1406, _92076)
   Call: (274) [system] compound(1406)
^  Redo: (273) [user] mfix_vars1(1406, _92076)
^  Unify: (273) [user] mfix_vars1(1406, _92076)
^  Call: (274) [user] symbol(1406)
^  Unify: (274) [user] symbol(1406)
   Call: (275) [system] atom(1406)
   Fail: (275) [system] atom(1406)
^  Fail: (274) [user] symbol(1406)
^  Redo: (273) [user] mfix_vars1(1406, _92076)
   Call: (274) [system] 1406=_92076
   Exit: (274) [system] 1406=1406
^  Exit: (273) [user] mfix_vars1(1406, 1406)
   Call: (273) [apply] apply:maplist_([0], _92078, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_126402|_126404], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _126402)
^  Unify: (274) [user] mfix_vars1(0, _126402)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _126402)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_131048))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _126402)
^  Unify: (274) [user] mfix_vars1(0, _126402)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _126402)
^  Unify: (274) [user] mfix_vars1(0, _126402)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _126402)
^  Unify: (274) [user] mfix_vars1(0, _126402)
   Call: (275) [system] 0==[_140328, _140334]
^  Redo: (274) [user] mfix_vars1(0, _126402)
^  Unify: (274) [user] mfix_vars1(0, _126402)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _126402)
^  Unify: (274) [user] mfix_vars1(0, _126402)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _126402)
^  Unify: (274) [user] mfix_vars1(0, _126402)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _126402)
^  Unify: (274) [user] mfix_vars1(0, _126402)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _126402)
   Call: (275) [system] 0=_126402
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _126404, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1406, 0], [1406, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0], [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0], [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0])
   Call: (270) [system] compound_name_arguments(_20576, '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _14990)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _176576))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _176576))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _176576))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _176576))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _176576)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _176576)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _182162))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _182162))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _182162)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _182162)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _182162)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _176576)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _9378))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _9378))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _9378))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _9378))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _9378)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _9378)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _204482))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _204482))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _204482)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _204482)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _204482)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0)))
   Call: (267) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _9378)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0)))
   Call: (261) [system] '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0)\=@='$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _233260, [], _233262)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _233260, [], _233262)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _233260, [], _233262)
   Call: (258) [system] atom('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _233260, [], _233262)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _233260, [], _233262)
   Call: (258) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
   Exit: (258) [system] compound('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), _242576, _242578)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0])
^  Call: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0], _244462, [], _233262)
^  Unify: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0], [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0], [], [])
   Call: (259) [system] var([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0])
^  Redo: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0], _244462, [], _233262)
^  Unify: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0], [_248198|_248200], [], _233262)
^  Call: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _248198, [], _249138)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", [], [])
   Call: (260) [system] var(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _248198, [], _249138)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _248198, [], _249138)
   Call: (260) [system] atom(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _248198, [], _249138)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _248198, [], _249138)
   Call: (260) [system] compound(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;")
^  Redo: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", _248198, [], _249138)
^  Unify: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", [], [])
^  Exit: (259) [user] subst_vars(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", [], [])
^  Call: (259) [user] subst_vars([1406, 0], _248200, [], _233262)
^  Unify: (259) [user] subst_vars([1406, 0], [1406, 0], [], [])
   Call: (260) [system] var([1406, 0])
^  Redo: (259) [user] subst_vars([1406, 0], _248200, [], _233262)
^  Unify: (259) [user] subst_vars([1406, 0], [_264070|_264072], [], _233262)
^  Call: (260) [user] subst_vars(1406, _264070, [], _265010)
^  Unify: (260) [user] subst_vars(1406, 1406, [], [])
   Call: (261) [system] var(1406)
^  Redo: (260) [user] subst_vars(1406, _264070, [], _265010)
^  Unify: (260) [user] subst_vars(1406, _264070, [], _265010)
   Call: (261) [system] atom(1406)
^  Redo: (260) [user] subst_vars(1406, _264070, [], _265010)
^  Unify: (260) [user] subst_vars(1406, _264070, [], _265010)
   Call: (261) [system] compound(1406)
^  Redo: (260) [user] subst_vars(1406, _264070, [], _265010)
^  Unify: (260) [user] subst_vars(1406, 1406, [], [])
^  Exit: (260) [user] subst_vars(1406, 1406, [], [])
^  Call: (260) [user] subst_vars([0], _264072, [], _233262)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _264072, [], _233262)
^  Unify: (260) [user] subst_vars([0], [_279942|_279944], [], _233262)
^  Call: (261) [user] subst_vars(0, _279942, [], _280882)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _279942, [], _280882)
^  Unify: (261) [user] subst_vars(0, _279942, [], _280882)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _279942, [], _280882)
^  Unify: (261) [user] subst_vars(0, _279942, [], _280882)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _279942, [], _280882)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _279944, [], _233262)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _279944, [], _233262)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1406, 0], [1406, 0], [], [])
^  Exit: (258) [user] subst_vars([";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0], [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0], [], [])
   Call: (258) [system] compound_name_arguments(_233260, '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT', [";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), [], [])
   Call: (257) [system] _303300=metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;", 1406, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1407, 0, 50590, '$COMMENT'(";; Original:", 1407, 0), '$stream_position'(50590, 1407, 0, 50624)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1407, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1407, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1407, 0), _356018))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1407, 0), _356018))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1407, 0), _356018)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1407, 0), _356018)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1407, 0), _356018)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1407, 0), _356018)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1407, 0), _361630))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1407, 0), _361630))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1407, 0), _361630))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1407, 0), _361630))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1407, 0), _361630)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1407, 0), _361630)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1407, 0), _367216))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1407, 0), _367216))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1407, 0), _367216)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1407, 0), _367216)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1407, 0), _367216)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1407, 0), _367216)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1407, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1407, 0), _367216)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1407, 0), '$VAR'(_374676))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1407, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1407, 0), _367216)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1407, 0), _367216)
   Call: (270) [system] '$COMMENT'(";; Original:", 1407, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1407, 0), _367216)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1407, 0), _367216)
   Call: (270) [system] '$COMMENT'(";; Original:", 1407, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1407, 0), _367216)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1407, 0), _367216)
   Call: (270) [system] '$COMMENT'(";; Original:", 1407, 0)==[_383956, _383962]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1407, 0), _367216)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1407, 0), _367216)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1407, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1407, 0), _367216)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1407, 0), _367216)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1407, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1407, 0), _367216)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1407, 0), _367216)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1407, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1407, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1407, 0), _394158, _394160)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1407, 0), '$COMMENT', [";; Original:", 1407, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1407, 0], _397900)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1407, 0], _397900)
   Call: (271) [apply] apply:maplist_([";; Original:", 1407, 0], _397900, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1407, 0], [_400718|_400720], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _400718)
^  Unify: (272) [user] mfix_vars1(";; Original:", _400718)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _400718)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_405364))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _400718)
^  Unify: (272) [user] mfix_vars1(";; Original:", _400718)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _400718)
^  Unify: (272) [user] mfix_vars1(";; Original:", _400718)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _400718)
^  Unify: (272) [user] mfix_vars1(";; Original:", _400718)
   Call: (273) [system] ";; Original:"==[_414644, _414650]
^  Redo: (272) [user] mfix_vars1(";; Original:", _400718)
^  Unify: (272) [user] mfix_vars1(";; Original:", _400718)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _400718)
^  Unify: (272) [user] mfix_vars1(";; Original:", _400718)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _400718)
^  Unify: (272) [user] mfix_vars1(";; Original:", _400718)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _400718)
^  Unify: (272) [user] mfix_vars1(";; Original:", _400718)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _400718)
   Call: (273) [system] ";; Original:"=_400718
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1407, 0], _400720, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1407, 0], [_438716|_438718], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1407, _438716)
^  Unify: (273) [user] mfix_vars1(1407, _438716)
   Call: (274) [system] var(1407)
^  Redo: (273) [user] mfix_vars1(1407, _438716)
^  Unify: (273) [user] mfix_vars1(1407, '$VAR'(_443362))
   Call: (274) [system] atom(1407)
^  Redo: (273) [user] mfix_vars1(1407, _438716)
^  Unify: (273) [user] mfix_vars1(1407, _438716)
   Call: (274) [system] 1407==true
^  Redo: (273) [user] mfix_vars1(1407, _438716)
^  Unify: (273) [user] mfix_vars1(1407, _438716)
   Call: (274) [system] 1407==false
^  Redo: (273) [user] mfix_vars1(1407, _438716)
^  Unify: (273) [user] mfix_vars1(1407, _438716)
   Call: (274) [system] 1407==[_452642, _452648]
^  Redo: (273) [user] mfix_vars1(1407, _438716)
^  Unify: (273) [user] mfix_vars1(1407, _438716)
   Call: (274) [system] is_list(1407)
^  Redo: (273) [user] mfix_vars1(1407, _438716)
^  Unify: (273) [user] mfix_vars1(1407, _438716)
   Call: (274) [system] string(1407)
^  Redo: (273) [user] mfix_vars1(1407, _438716)
^  Unify: (273) [user] mfix_vars1(1407, _438716)
   Call: (274) [system] compound(1407)
^  Redo: (273) [user] mfix_vars1(1407, _438716)
^  Unify: (273) [user] mfix_vars1(1407, _438716)
^  Call: (274) [user] symbol(1407)
^  Unify: (274) [user] symbol(1407)
   Call: (275) [system] atom(1407)
   Fail: (275) [system] atom(1407)
^  Fail: (274) [user] symbol(1407)
^  Redo: (273) [user] mfix_vars1(1407, _438716)
   Call: (274) [system] 1407=_438716
   Exit: (274) [system] 1407=1407
^  Exit: (273) [user] mfix_vars1(1407, 1407)
   Call: (273) [apply] apply:maplist_([0], _438718, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_473042|_473044], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _473042)
^  Unify: (274) [user] mfix_vars1(0, _473042)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _473042)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_477688))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _473042)
^  Unify: (274) [user] mfix_vars1(0, _473042)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _473042)
^  Unify: (274) [user] mfix_vars1(0, _473042)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _473042)
^  Unify: (274) [user] mfix_vars1(0, _473042)
   Call: (275) [system] 0==[_486968, _486974]
^  Redo: (274) [user] mfix_vars1(0, _473042)
^  Unify: (274) [user] mfix_vars1(0, _473042)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _473042)
^  Unify: (274) [user] mfix_vars1(0, _473042)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _473042)
^  Unify: (274) [user] mfix_vars1(0, _473042)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _473042)
^  Unify: (274) [user] mfix_vars1(0, _473042)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _473042)
   Call: (275) [system] 0=_473042
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _473044, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1407, 0], [1407, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1407, 0], [";; Original:", 1407, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1407, 0], [";; Original:", 1407, 0])
   Call: (270) [system] compound_name_arguments(_367216, '$COMMENT', [";; Original:", 1407, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1407, 0), '$COMMENT', [";; Original:", 1407, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1407, 0)\=@='$COMMENT'(";; Original:", 1407, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1407, 0), _361630)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1407, 0), _523216))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1407, 0), _5966))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1407, 0), _5966))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1407, 0), _5966))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1407, 0), _5966)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1407, 0), _5966)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1407, 0), _10598))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1407, 0), _10598))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1407, 0), _10598)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1407, 0), _10598)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1407, 0), _10598)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1407, 0)\=@='$COMMENT'(";; Original:", 1407, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1407, 0), _5966)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1407, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1407, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1407, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1407, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1407, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1407, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1407, 0), _32918))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1407, 0), _32918))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1407, 0), _32918)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1407, 0), _32918)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1407, 0), _32918)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1407, 0)\=@='$COMMENT'(";; Original:", 1407, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1407, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1407, 0)\=@='$COMMENT'(";; Original:", 1407, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1407, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1407, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1407, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1407, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1407, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1407, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1407, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1407, 0), _61696, [], _61698)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1407, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1407, 0), _61696, [], _61698)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1407, 0), _61696, [], _61698)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1407, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1407, 0), _61696, [], _61698)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1407, 0), _61696, [], _61698)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1407, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1407, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1407, 0), _71012, _71014)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1407, 0), '$COMMENT', [";; Original:", 1407, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1407, 0], _72898, [], _61698)
^  Unify: (258) [user] subst_vars([";; Original:", 1407, 0], [";; Original:", 1407, 0], [], [])
   Call: (259) [system] var([";; Original:", 1407, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1407, 0], _72898, [], _61698)
^  Unify: (258) [user] subst_vars([";; Original:", 1407, 0], [_76634|_76636], [], _61698)
^  Call: (259) [user] subst_vars(";; Original:", _76634, [], _77574)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _76634, [], _77574)
^  Unify: (259) [user] subst_vars(";; Original:", _76634, [], _77574)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _76634, [], _77574)
^  Unify: (259) [user] subst_vars(";; Original:", _76634, [], _77574)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _76634, [], _77574)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1407, 0], _76636, [], _61698)
^  Unify: (259) [user] subst_vars([1407, 0], [1407, 0], [], [])
   Call: (260) [system] var([1407, 0])
^  Redo: (259) [user] subst_vars([1407, 0], _76636, [], _61698)
^  Unify: (259) [user] subst_vars([1407, 0], [_92506|_92508], [], _61698)
^  Call: (260) [user] subst_vars(1407, _92506, [], _93446)
^  Unify: (260) [user] subst_vars(1407, 1407, [], [])
   Call: (261) [system] var(1407)
^  Redo: (260) [user] subst_vars(1407, _92506, [], _93446)
^  Unify: (260) [user] subst_vars(1407, _92506, [], _93446)
   Call: (261) [system] atom(1407)
^  Redo: (260) [user] subst_vars(1407, _92506, [], _93446)
^  Unify: (260) [user] subst_vars(1407, _92506, [], _93446)
   Call: (261) [system] compound(1407)
^  Redo: (260) [user] subst_vars(1407, _92506, [], _93446)
^  Unify: (260) [user] subst_vars(1407, 1407, [], [])
^  Exit: (260) [user] subst_vars(1407, 1407, [], [])
^  Call: (260) [user] subst_vars([0], _92508, [], _61698)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _92508, [], _61698)
^  Unify: (260) [user] subst_vars([0], [_108378|_108380], [], _61698)
^  Call: (261) [user] subst_vars(0, _108378, [], _109318)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _108378, [], _109318)
^  Unify: (261) [user] subst_vars(0, _108378, [], _109318)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _108378, [], _109318)
^  Unify: (261) [user] subst_vars(0, _108378, [], _109318)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _108378, [], _109318)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _108380, [], _61698)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _108380, [], _61698)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1407, 0], [1407, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1407, 0], [";; Original:", 1407, 0], [], [])
   Call: (258) [system] compound_name_arguments(_61696, '$COMMENT', [";; Original:", 1407, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1407, 0), '$COMMENT', [";; Original:", 1407, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1407, 0), '$COMMENT'(";; Original:", 1407, 0), [], [])
   Call: (257) [system] _131736=metta_file_buffer(+, '$COMMENT'(";; Original:", 1407, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1407, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1407, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1407, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1407, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1407, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1407, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1407, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1407, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1408, 0, 50603, '$COMMENT'(";;    #[test]", 1408, 0), '$stream_position'(50603, 1408, 0, 50637)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1408, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1408, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1408, 0), _184454))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1408, 0), _184454))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1408, 0), _184454)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1408, 0), _184454)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1408, 0), _184454)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1408, 0), _184454)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1408, 0), _190066))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1408, 0), _190066))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1408, 0), _190066))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1408, 0), _190066))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1408, 0), _190066)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1408, 0), _190066)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    #[test]", 1408, 0), _195652))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1408, 0), _195652))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    #[test]", 1408, 0), _195652)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1408, 0), _195652)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1408, 0), _195652)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1408, 0), _195652)
   Call: (270) [system] var('$COMMENT'(";;    #[test]", 1408, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1408, 0), _195652)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1408, 0), '$VAR'(_203112))
   Call: (270) [system] atom('$COMMENT'(";;    #[test]", 1408, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1408, 0), _195652)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1408, 0), _195652)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1408, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1408, 0), _195652)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1408, 0), _195652)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1408, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1408, 0), _195652)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1408, 0), _195652)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1408, 0)==[_212392, _212398]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1408, 0), _195652)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1408, 0), _195652)
   Call: (270) [system] is_list('$COMMENT'(";;    #[test]", 1408, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1408, 0), _195652)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1408, 0), _195652)
   Call: (270) [system] string('$COMMENT'(";;    #[test]", 1408, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1408, 0), _195652)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1408, 0), _195652)
   Call: (270) [system] compound('$COMMENT'(";;    #[test]", 1408, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    #[test]", 1408, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1408, 0), _222594, _222596)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT', [";;    #[test]", 1408, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    #[test]", 1408, 0], _226336)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1408, 0], _226336)
   Call: (271) [apply] apply:maplist_([";;    #[test]", 1408, 0], _226336, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    #[test]", 1408, 0], [_229154|_229156], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    #[test]", _229154)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _229154)
   Call: (273) [system] var(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _229154)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", '$VAR'(_233800))
   Call: (273) [system] atom(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _229154)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _229154)
   Call: (273) [system] ";;    #[test]"==true
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _229154)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _229154)
   Call: (273) [system] ";;    #[test]"==false
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _229154)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _229154)
   Call: (273) [system] ";;    #[test]"==[_243080, _243086]
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _229154)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _229154)
   Call: (273) [system] is_list(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _229154)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _229154)
   Call: (273) [system] string(";;    #[test]")
   Exit: (273) [system] string(";;    #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _229154)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _229154)
   Call: (273) [system] compound(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _229154)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _229154)
^  Call: (273) [user] symbol(";;    #[test]")
^  Unify: (273) [user] symbol(";;    #[test]")
   Call: (274) [system] atom(";;    #[test]")
   Fail: (274) [system] atom(";;    #[test]")
^  Fail: (273) [user] symbol(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _229154)
   Call: (273) [system] ";;    #[test]"=_229154
   Exit: (273) [system] ";;    #[test]"=";;    #[test]"
^  Exit: (272) [user] mfix_vars1(";;    #[test]", ";;    #[test]")
   Call: (272) [apply] apply:maplist_([1408, 0], _229156, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1408, 0], [_267152|_267154], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1408, _267152)
^  Unify: (273) [user] mfix_vars1(1408, _267152)
   Call: (274) [system] var(1408)
^  Redo: (273) [user] mfix_vars1(1408, _267152)
^  Unify: (273) [user] mfix_vars1(1408, '$VAR'(_271798))
   Call: (274) [system] atom(1408)
^  Redo: (273) [user] mfix_vars1(1408, _267152)
^  Unify: (273) [user] mfix_vars1(1408, _267152)
   Call: (274) [system] 1408==true
^  Redo: (273) [user] mfix_vars1(1408, _267152)
^  Unify: (273) [user] mfix_vars1(1408, _267152)
   Call: (274) [system] 1408==false
^  Redo: (273) [user] mfix_vars1(1408, _267152)
^  Unify: (273) [user] mfix_vars1(1408, _267152)
   Call: (274) [system] 1408==[_281078, _281084]
^  Redo: (273) [user] mfix_vars1(1408, _267152)
^  Unify: (273) [user] mfix_vars1(1408, _267152)
   Call: (274) [system] is_list(1408)
^  Redo: (273) [user] mfix_vars1(1408, _267152)
^  Unify: (273) [user] mfix_vars1(1408, _267152)
   Call: (274) [system] string(1408)
^  Redo: (273) [user] mfix_vars1(1408, _267152)
^  Unify: (273) [user] mfix_vars1(1408, _267152)
   Call: (274) [system] compound(1408)
^  Redo: (273) [user] mfix_vars1(1408, _267152)
^  Unify: (273) [user] mfix_vars1(1408, _267152)
^  Call: (274) [user] symbol(1408)
^  Unify: (274) [user] symbol(1408)
   Call: (275) [system] atom(1408)
   Fail: (275) [system] atom(1408)
^  Fail: (274) [user] symbol(1408)
^  Redo: (273) [user] mfix_vars1(1408, _267152)
   Call: (274) [system] 1408=_267152
   Exit: (274) [system] 1408=1408
^  Exit: (273) [user] mfix_vars1(1408, 1408)
   Call: (273) [apply] apply:maplist_([0], _267154, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_301478|_301480], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _301478)
^  Unify: (274) [user] mfix_vars1(0, _301478)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _301478)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_306124))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _301478)
^  Unify: (274) [user] mfix_vars1(0, _301478)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _301478)
^  Unify: (274) [user] mfix_vars1(0, _301478)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _301478)
^  Unify: (274) [user] mfix_vars1(0, _301478)
   Call: (275) [system] 0==[_315404, _315410]
^  Redo: (274) [user] mfix_vars1(0, _301478)
^  Unify: (274) [user] mfix_vars1(0, _301478)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _301478)
^  Unify: (274) [user] mfix_vars1(0, _301478)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _301478)
^  Unify: (274) [user] mfix_vars1(0, _301478)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _301478)
^  Unify: (274) [user] mfix_vars1(0, _301478)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _301478)
   Call: (275) [system] 0=_301478
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _301480, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1408, 0], [1408, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    #[test]", 1408, 0], [";;    #[test]", 1408, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1408, 0], [";;    #[test]", 1408, 0])
   Call: (270) [system] compound_name_arguments(_195652, '$COMMENT', [";;    #[test]", 1408, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT', [";;    #[test]", 1408, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1408, 0)\=@='$COMMENT'(";;    #[test]", 1408, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1408, 0), _190066)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    #[test]", 1408, 0), _351652))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1408, 0), _351652))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1408, 0), _351652))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1408, 0), _351652))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1408, 0), _351652)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1408, 0), _351652)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    #[test]", 1408, 0), _357238))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1408, 0), _357238))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    #[test]", 1408, 0), _357238)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1408, 0), _357238)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1408, 0), _357238)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1408, 0)\=@='$COMMENT'(";;    #[test]", 1408, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1408, 0), _351652)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    #[test]", 1408, 0), _184454))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1408, 0), _184454))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1408, 0), _184454))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1408, 0), _184454))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1408, 0), _184454)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1408, 0), _184454)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    #[test]", 1408, 0), _379558))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1408, 0), _379558))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    #[test]", 1408, 0), _379558)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1408, 0), _379558)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1408, 0), _379558)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1408, 0)\=@='$COMMENT'(";;    #[test]", 1408, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1408, 0), _184454)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0)))
   Call: (261) [system] '$COMMENT'(";;    #[test]", 1408, 0)\=@='$COMMENT'(";;    #[test]", 1408, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1408, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1408, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1408, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1408, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1408, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1408, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1408, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1408, 0), _408336, [], _408338)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    #[test]", 1408, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1408, 0), _408336, [], _408338)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1408, 0), _408336, [], _408338)
   Call: (258) [system] atom('$COMMENT'(";;    #[test]", 1408, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1408, 0), _408336, [], _408338)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1408, 0), _408336, [], _408338)
   Call: (258) [system] compound('$COMMENT'(";;    #[test]", 1408, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    #[test]", 1408, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1408, 0), _417652, _417654)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT', [";;    #[test]", 1408, 0])
^  Call: (258) [user] subst_vars([";;    #[test]", 1408, 0], _419538, [], _408338)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1408, 0], [";;    #[test]", 1408, 0], [], [])
   Call: (259) [system] var([";;    #[test]", 1408, 0])
^  Redo: (258) [user] subst_vars([";;    #[test]", 1408, 0], _419538, [], _408338)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1408, 0], [_423274|_423276], [], _408338)
^  Call: (259) [user] subst_vars(";;    #[test]", _423274, [], _424214)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
   Call: (260) [system] var(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _423274, [], _424214)
^  Unify: (259) [user] subst_vars(";;    #[test]", _423274, [], _424214)
   Call: (260) [system] atom(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _423274, [], _424214)
^  Unify: (259) [user] subst_vars(";;    #[test]", _423274, [], _424214)
   Call: (260) [system] compound(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _423274, [], _424214)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Exit: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Call: (259) [user] subst_vars([1408, 0], _423276, [], _408338)
^  Unify: (259) [user] subst_vars([1408, 0], [1408, 0], [], [])
   Call: (260) [system] var([1408, 0])
^  Redo: (259) [user] subst_vars([1408, 0], _423276, [], _408338)
^  Unify: (259) [user] subst_vars([1408, 0], [_439146|_439148], [], _408338)
^  Call: (260) [user] subst_vars(1408, _439146, [], _440086)
^  Unify: (260) [user] subst_vars(1408, 1408, [], [])
   Call: (261) [system] var(1408)
^  Redo: (260) [user] subst_vars(1408, _439146, [], _440086)
^  Unify: (260) [user] subst_vars(1408, _439146, [], _440086)
   Call: (261) [system] atom(1408)
^  Redo: (260) [user] subst_vars(1408, _439146, [], _440086)
^  Unify: (260) [user] subst_vars(1408, _439146, [], _440086)
   Call: (261) [system] compound(1408)
^  Redo: (260) [user] subst_vars(1408, _439146, [], _440086)
^  Unify: (260) [user] subst_vars(1408, 1408, [], [])
^  Exit: (260) [user] subst_vars(1408, 1408, [], [])
^  Call: (260) [user] subst_vars([0], _439148, [], _408338)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _439148, [], _408338)
^  Unify: (260) [user] subst_vars([0], [_455018|_455020], [], _408338)
^  Call: (261) [user] subst_vars(0, _455018, [], _455958)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _455018, [], _455958)
^  Unify: (261) [user] subst_vars(0, _455018, [], _455958)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _455018, [], _455958)
^  Unify: (261) [user] subst_vars(0, _455018, [], _455958)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _455018, [], _455958)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _455020, [], _408338)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _455020, [], _408338)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1408, 0], [1408, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    #[test]", 1408, 0], [";;    #[test]", 1408, 0], [], [])
   Call: (258) [system] compound_name_arguments(_408336, '$COMMENT', [";;    #[test]", 1408, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT', [";;    #[test]", 1408, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1408, 0), '$COMMENT'(";;    #[test]", 1408, 0), [], [])
   Call: (257) [system] _478376=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1408, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1408, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1408, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1408, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1408, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1408, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1408, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1408, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1408, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1409, 0, 50617, '$COMMENT'(";;    fn test_quote() {", 1409, 0), '$stream_position'(50617, 1409, 0, 50651)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _13556))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _13556))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _13556)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _13556)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    fn test_quote() {", 1409, 0), _13556)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    fn test_quote() {", 1409, 0), _13556)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _19168))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _19168))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _19168))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _19168))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _19168)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _19168)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _24754))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _24754))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _24754)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _24754)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_quote() {", 1409, 0), _24754)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_quote() {", 1409, 0), _24754)
   Call: (270) [system] var('$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_quote() {", 1409, 0), _24754)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_quote() {", 1409, 0), '$VAR'(_32214))
   Call: (270) [system] atom('$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_quote() {", 1409, 0), _24754)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_quote() {", 1409, 0), _24754)
   Call: (270) [system] '$COMMENT'(";;    fn test_quote() {", 1409, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_quote() {", 1409, 0), _24754)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_quote() {", 1409, 0), _24754)
   Call: (270) [system] '$COMMENT'(";;    fn test_quote() {", 1409, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_quote() {", 1409, 0), _24754)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_quote() {", 1409, 0), _24754)
   Call: (270) [system] '$COMMENT'(";;    fn test_quote() {", 1409, 0)==[_41494, _41500]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_quote() {", 1409, 0), _24754)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_quote() {", 1409, 0), _24754)
   Call: (270) [system] is_list('$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_quote() {", 1409, 0), _24754)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_quote() {", 1409, 0), _24754)
   Call: (270) [system] string('$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_quote() {", 1409, 0), _24754)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_quote() {", 1409, 0), _24754)
   Call: (270) [system] compound('$COMMENT'(";;    fn test_quote() {", 1409, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    fn test_quote() {", 1409, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    fn test_quote() {", 1409, 0), _51696, _51698)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT', [";;    fn test_quote() {", 1409, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    fn test_quote() {", 1409, 0], _55438)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn test_quote() {", 1409, 0], _55438)
   Call: (271) [apply] apply:maplist_([";;    fn test_quote() {", 1409, 0], _55438, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    fn test_quote() {", 1409, 0], [_58256|_58258], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    fn test_quote() {", _58256)
^  Unify: (272) [user] mfix_vars1(";;    fn test_quote() {", _58256)
   Call: (273) [system] var(";;    fn test_quote() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_quote() {", _58256)
^  Unify: (272) [user] mfix_vars1(";;    fn test_quote() {", '$VAR'(_62902))
   Call: (273) [system] atom(";;    fn test_quote() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_quote() {", _58256)
^  Unify: (272) [user] mfix_vars1(";;    fn test_quote() {", _58256)
   Call: (273) [system] ";;    fn test_quote() {"==true
^  Redo: (272) [user] mfix_vars1(";;    fn test_quote() {", _58256)
^  Unify: (272) [user] mfix_vars1(";;    fn test_quote() {", _58256)
   Call: (273) [system] ";;    fn test_quote() {"==false
^  Redo: (272) [user] mfix_vars1(";;    fn test_quote() {", _58256)
^  Unify: (272) [user] mfix_vars1(";;    fn test_quote() {", _58256)
   Call: (273) [system] ";;    fn test_quote() {"==[_72182, _72188]
^  Redo: (272) [user] mfix_vars1(";;    fn test_quote() {", _58256)
^  Unify: (272) [user] mfix_vars1(";;    fn test_quote() {", _58256)
   Call: (273) [system] is_list(";;    fn test_quote() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_quote() {", _58256)
^  Unify: (272) [user] mfix_vars1(";;    fn test_quote() {", _58256)
   Call: (273) [system] string(";;    fn test_quote() {")
   Exit: (273) [system] string(";;    fn test_quote() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    fn test_quote() {", _58256)
^  Unify: (272) [user] mfix_vars1(";;    fn test_quote() {", _58256)
   Call: (273) [system] compound(";;    fn test_quote() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_quote() {", _58256)
^  Unify: (272) [user] mfix_vars1(";;    fn test_quote() {", _58256)
^  Call: (273) [user] symbol(";;    fn test_quote() {")
^  Unify: (273) [user] symbol(";;    fn test_quote() {")
   Call: (274) [system] atom(";;    fn test_quote() {")
   Fail: (274) [system] atom(";;    fn test_quote() {")
^  Fail: (273) [user] symbol(";;    fn test_quote() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_quote() {", _58256)
   Call: (273) [system] ";;    fn test_quote() {"=_58256
   Exit: (273) [system] ";;    fn test_quote() {"=";;    fn test_quote() {"
^  Exit: (272) [user] mfix_vars1(";;    fn test_quote() {", ";;    fn test_quote() {")
   Call: (272) [apply] apply:maplist_([1409, 0], _58258, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1409, 0], [_96254|_96256], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1409, _96254)
^  Unify: (273) [user] mfix_vars1(1409, _96254)
   Call: (274) [system] var(1409)
^  Redo: (273) [user] mfix_vars1(1409, _96254)
^  Unify: (273) [user] mfix_vars1(1409, '$VAR'(_100900))
   Call: (274) [system] atom(1409)
^  Redo: (273) [user] mfix_vars1(1409, _96254)
^  Unify: (273) [user] mfix_vars1(1409, _96254)
   Call: (274) [system] 1409==true
^  Redo: (273) [user] mfix_vars1(1409, _96254)
^  Unify: (273) [user] mfix_vars1(1409, _96254)
   Call: (274) [system] 1409==false
^  Redo: (273) [user] mfix_vars1(1409, _96254)
^  Unify: (273) [user] mfix_vars1(1409, _96254)
   Call: (274) [system] 1409==[_110180, _110186]
^  Redo: (273) [user] mfix_vars1(1409, _96254)
^  Unify: (273) [user] mfix_vars1(1409, _96254)
   Call: (274) [system] is_list(1409)
^  Redo: (273) [user] mfix_vars1(1409, _96254)
^  Unify: (273) [user] mfix_vars1(1409, _96254)
   Call: (274) [system] string(1409)
^  Redo: (273) [user] mfix_vars1(1409, _96254)
^  Unify: (273) [user] mfix_vars1(1409, _96254)
   Call: (274) [system] compound(1409)
^  Redo: (273) [user] mfix_vars1(1409, _96254)
^  Unify: (273) [user] mfix_vars1(1409, _96254)
^  Call: (274) [user] symbol(1409)
^  Unify: (274) [user] symbol(1409)
   Call: (275) [system] atom(1409)
   Fail: (275) [system] atom(1409)
^  Fail: (274) [user] symbol(1409)
^  Redo: (273) [user] mfix_vars1(1409, _96254)
   Call: (274) [system] 1409=_96254
   Exit: (274) [system] 1409=1409
^  Exit: (273) [user] mfix_vars1(1409, 1409)
   Call: (273) [apply] apply:maplist_([0], _96256, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_130580|_130582], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _130580)
^  Unify: (274) [user] mfix_vars1(0, _130580)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _130580)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_135226))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _130580)
^  Unify: (274) [user] mfix_vars1(0, _130580)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _130580)
^  Unify: (274) [user] mfix_vars1(0, _130580)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _130580)
^  Unify: (274) [user] mfix_vars1(0, _130580)
   Call: (275) [system] 0==[_144506, _144512]
^  Redo: (274) [user] mfix_vars1(0, _130580)
^  Unify: (274) [user] mfix_vars1(0, _130580)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _130580)
^  Unify: (274) [user] mfix_vars1(0, _130580)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _130580)
^  Unify: (274) [user] mfix_vars1(0, _130580)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _130580)
^  Unify: (274) [user] mfix_vars1(0, _130580)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _130580)
   Call: (275) [system] 0=_130580
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _130582, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1409, 0], [1409, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    fn test_quote() {", 1409, 0], [";;    fn test_quote() {", 1409, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn test_quote() {", 1409, 0], [";;    fn test_quote() {", 1409, 0])
   Call: (270) [system] compound_name_arguments(_24754, '$COMMENT', [";;    fn test_quote() {", 1409, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT', [";;    fn test_quote() {", 1409, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn test_quote() {", 1409, 0)\=@='$COMMENT'(";;    fn test_quote() {", 1409, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _19168)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _180754))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _180754))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _180754))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _180754))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _180754)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _180754)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _186340))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _186340))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _186340)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _186340)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    fn test_quote() {", 1409, 0), _186340)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn test_quote() {", 1409, 0)\=@='$COMMENT'(";;    fn test_quote() {", 1409, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _180754)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _13556))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _13556))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _13556))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _13556))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _13556)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _13556)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _208660))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _208660))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _208660)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _208660)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    fn test_quote() {", 1409, 0), _208660)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn test_quote() {", 1409, 0)\=@='$COMMENT'(";;    fn test_quote() {", 1409, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _13556)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0)))
   Call: (261) [system] '$COMMENT'(";;    fn test_quote() {", 1409, 0)\=@='$COMMENT'(";;    fn test_quote() {", 1409, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_quote() {", 1409, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    fn test_quote() {", 1409, 0), _237438, [], _237440)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn test_quote() {", 1409, 0), _237438, [], _237440)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn test_quote() {", 1409, 0), _237438, [], _237440)
   Call: (258) [system] atom('$COMMENT'(";;    fn test_quote() {", 1409, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn test_quote() {", 1409, 0), _237438, [], _237440)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn test_quote() {", 1409, 0), _237438, [], _237440)
   Call: (258) [system] compound('$COMMENT'(";;    fn test_quote() {", 1409, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    fn test_quote() {", 1409, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    fn test_quote() {", 1409, 0), _246754, _246756)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT', [";;    fn test_quote() {", 1409, 0])
^  Call: (258) [user] subst_vars([";;    fn test_quote() {", 1409, 0], _248640, [], _237440)
^  Unify: (258) [user] subst_vars([";;    fn test_quote() {", 1409, 0], [";;    fn test_quote() {", 1409, 0], [], [])
   Call: (259) [system] var([";;    fn test_quote() {", 1409, 0])
^  Redo: (258) [user] subst_vars([";;    fn test_quote() {", 1409, 0], _248640, [], _237440)
^  Unify: (258) [user] subst_vars([";;    fn test_quote() {", 1409, 0], [_252376|_252378], [], _237440)
^  Call: (259) [user] subst_vars(";;    fn test_quote() {", _252376, [], _253316)
^  Unify: (259) [user] subst_vars(";;    fn test_quote() {", ";;    fn test_quote() {", [], [])
   Call: (260) [system] var(";;    fn test_quote() {")
^  Redo: (259) [user] subst_vars(";;    fn test_quote() {", _252376, [], _253316)
^  Unify: (259) [user] subst_vars(";;    fn test_quote() {", _252376, [], _253316)
   Call: (260) [system] atom(";;    fn test_quote() {")
^  Redo: (259) [user] subst_vars(";;    fn test_quote() {", _252376, [], _253316)
^  Unify: (259) [user] subst_vars(";;    fn test_quote() {", _252376, [], _253316)
   Call: (260) [system] compound(";;    fn test_quote() {")
^  Redo: (259) [user] subst_vars(";;    fn test_quote() {", _252376, [], _253316)
^  Unify: (259) [user] subst_vars(";;    fn test_quote() {", ";;    fn test_quote() {", [], [])
^  Exit: (259) [user] subst_vars(";;    fn test_quote() {", ";;    fn test_quote() {", [], [])
^  Call: (259) [user] subst_vars([1409, 0], _252378, [], _237440)
^  Unify: (259) [user] subst_vars([1409, 0], [1409, 0], [], [])
   Call: (260) [system] var([1409, 0])
^  Redo: (259) [user] subst_vars([1409, 0], _252378, [], _237440)
^  Unify: (259) [user] subst_vars([1409, 0], [_268248|_268250], [], _237440)
^  Call: (260) [user] subst_vars(1409, _268248, [], _269188)
^  Unify: (260) [user] subst_vars(1409, 1409, [], [])
   Call: (261) [system] var(1409)
^  Redo: (260) [user] subst_vars(1409, _268248, [], _269188)
^  Unify: (260) [user] subst_vars(1409, _268248, [], _269188)
   Call: (261) [system] atom(1409)
^  Redo: (260) [user] subst_vars(1409, _268248, [], _269188)
^  Unify: (260) [user] subst_vars(1409, _268248, [], _269188)
   Call: (261) [system] compound(1409)
^  Redo: (260) [user] subst_vars(1409, _268248, [], _269188)
^  Unify: (260) [user] subst_vars(1409, 1409, [], [])
^  Exit: (260) [user] subst_vars(1409, 1409, [], [])
^  Call: (260) [user] subst_vars([0], _268250, [], _237440)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _268250, [], _237440)
^  Unify: (260) [user] subst_vars([0], [_284120|_284122], [], _237440)
^  Call: (261) [user] subst_vars(0, _284120, [], _285060)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _284120, [], _285060)
^  Unify: (261) [user] subst_vars(0, _284120, [], _285060)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _284120, [], _285060)
^  Unify: (261) [user] subst_vars(0, _284120, [], _285060)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _284120, [], _285060)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _284122, [], _237440)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _284122, [], _237440)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1409, 0], [1409, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    fn test_quote() {", 1409, 0], [";;    fn test_quote() {", 1409, 0], [], [])
   Call: (258) [system] compound_name_arguments(_237438, '$COMMENT', [";;    fn test_quote() {", 1409, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT', [";;    fn test_quote() {", 1409, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    fn test_quote() {", 1409, 0), '$COMMENT'(";;    fn test_quote() {", 1409, 0), [], [])
   Call: (257) [system] _307478=metta_file_buffer(+, '$COMMENT'(";;    fn test_quote() {", 1409, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    fn test_quote() {", 1409, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    fn test_quote() {", 1409, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn test_quote() {", 1409, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn test_quote() {", 1409, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn test_quote() {", 1409, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn test_quote() {", 1409, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn test_quote() {", 1409, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn test_quote() {", 1409, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1410, 0, 50641, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$stream_position'(50641, 1410, 0, 50675)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _360210))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _360210))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _360210)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _360210)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _360210)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _360210)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _365822))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _365822))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _365822))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _365822))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _365822)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _365822)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _371408))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _371408))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _371408)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _371408)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _371408)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _371408)
   Call: (270) [system] var('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _371408)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$VAR'(_378868))
   Call: (270) [system] atom('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _371408)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _371408)
   Call: (270) [system] '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _371408)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _371408)
   Call: (270) [system] '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _371408)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _371408)
   Call: (270) [system] '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0)==[_388148, _388154]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _371408)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _371408)
   Call: (270) [system] is_list('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _371408)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _371408)
   Call: (270) [system] string('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _371408)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _371408)
   Call: (270) [system] compound('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _398350, _398352)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT', [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0], _402092)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0], _402092)
   Call: (271) [apply] apply:maplist_([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0], _402092, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0], [_404910|_404912], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _404910)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _404910)
   Call: (273) [system] var(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _404910)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", '$VAR'(_409556))
   Call: (273) [system] atom(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _404910)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _404910)
   Call: (273) [system] ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));"==true
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _404910)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _404910)
   Call: (273) [system] ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));"==false
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _404910)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _404910)
   Call: (273) [system] ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));"==[_418836, _418842]
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _404910)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _404910)
   Call: (273) [system] is_list(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _404910)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _404910)
   Call: (273) [system] string(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Exit: (273) [system] string(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _404910)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _404910)
   Call: (273) [system] compound(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _404910)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _404910)
^  Call: (273) [user] symbol(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Unify: (273) [user] symbol(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (274) [system] atom(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Fail: (274) [system] atom(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Fail: (273) [user] symbol(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _404910)
   Call: (273) [system] ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));"=_404910
   Exit: (273) [system] ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));"=";;        let metta = Metta::new(Some(EnvBuilder::test_env()));"
^  Exit: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (272) [apply] apply:maplist_([1410, 0], _404912, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1410, 0], [_442908|_442910], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1410, _442908)
^  Unify: (273) [user] mfix_vars1(1410, _442908)
   Call: (274) [system] var(1410)
^  Redo: (273) [user] mfix_vars1(1410, _442908)
^  Unify: (273) [user] mfix_vars1(1410, '$VAR'(_447554))
   Call: (274) [system] atom(1410)
^  Redo: (273) [user] mfix_vars1(1410, _442908)
^  Unify: (273) [user] mfix_vars1(1410, _442908)
   Call: (274) [system] 1410==true
^  Redo: (273) [user] mfix_vars1(1410, _442908)
^  Unify: (273) [user] mfix_vars1(1410, _442908)
   Call: (274) [system] 1410==false
^  Redo: (273) [user] mfix_vars1(1410, _442908)
^  Unify: (273) [user] mfix_vars1(1410, _442908)
   Call: (274) [system] 1410==[_456834, _456840]
^  Redo: (273) [user] mfix_vars1(1410, _442908)
^  Unify: (273) [user] mfix_vars1(1410, _442908)
   Call: (274) [system] is_list(1410)
^  Redo: (273) [user] mfix_vars1(1410, _442908)
^  Unify: (273) [user] mfix_vars1(1410, _442908)
   Call: (274) [system] string(1410)
^  Redo: (273) [user] mfix_vars1(1410, _442908)
^  Unify: (273) [user] mfix_vars1(1410, _442908)
   Call: (274) [system] compound(1410)
^  Redo: (273) [user] mfix_vars1(1410, _442908)
^  Unify: (273) [user] mfix_vars1(1410, _442908)
^  Call: (274) [user] symbol(1410)
^  Unify: (274) [user] symbol(1410)
   Call: (275) [system] atom(1410)
   Fail: (275) [system] atom(1410)
^  Fail: (274) [user] symbol(1410)
^  Redo: (273) [user] mfix_vars1(1410, _442908)
   Call: (274) [system] 1410=_442908
   Exit: (274) [system] 1410=1410
^  Exit: (273) [user] mfix_vars1(1410, 1410)
   Call: (273) [apply] apply:maplist_([0], _442910, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_477234|_477236], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _477234)
^  Unify: (274) [user] mfix_vars1(0, _477234)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _477234)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_481880))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _477234)
^  Unify: (274) [user] mfix_vars1(0, _477234)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _477234)
^  Unify: (274) [user] mfix_vars1(0, _477234)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _477234)
^  Unify: (274) [user] mfix_vars1(0, _477234)
   Call: (275) [system] 0==[_491160, _491166]
^  Redo: (274) [user] mfix_vars1(0, _477234)
^  Unify: (274) [user] mfix_vars1(0, _477234)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _477234)
^  Unify: (274) [user] mfix_vars1(0, _477234)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _477234)
^  Unify: (274) [user] mfix_vars1(0, _477234)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _477234)
^  Unify: (274) [user] mfix_vars1(0, _477234)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _477234)
   Call: (275) [system] 0=_477234
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _477236, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1410, 0], [1410, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0], [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0], [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0])
   Call: (270) [system] compound_name_arguments(_371408, '$COMMENT', [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT', [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0)))
   Call: (267) [system] '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0)\=@='$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _365822)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _9452))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _9452))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _9452))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _9452))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _9452)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _9452)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _15038))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _15038))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _15038)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _15038)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _15038)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0)))
   Call: (267) [system] '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0)\=@='$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _9452)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _5958))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _5958))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _5958))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _5958))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _5958)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _5958)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _37358))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _37358))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _37358)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _37358)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _37358)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0)))
   Call: (267) [system] '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0)\=@='$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _5958)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0)))
   Call: (261) [system] '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0)\=@='$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _66136, [], _66138)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _66136, [], _66138)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _66136, [], _66138)
   Call: (258) [system] atom('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _66136, [], _66138)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _66136, [], _66138)
   Call: (258) [system] compound('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), _75452, _75454)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT', [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0])
^  Call: (258) [user] subst_vars([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0], _77338, [], _66138)
^  Unify: (258) [user] subst_vars([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0], [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0], [], [])
   Call: (259) [system] var([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0])
^  Redo: (258) [user] subst_vars([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0], _77338, [], _66138)
^  Unify: (258) [user] subst_vars([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0], [_81074|_81076], [], _66138)
^  Call: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _81074, [], _82014)
^  Unify: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
   Call: (260) [system] var(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _81074, [], _82014)
^  Unify: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _81074, [], _82014)
   Call: (260) [system] atom(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _81074, [], _82014)
^  Unify: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _81074, [], _82014)
   Call: (260) [system] compound(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _81074, [], _82014)
^  Unify: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Exit: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Call: (259) [user] subst_vars([1410, 0], _81076, [], _66138)
^  Unify: (259) [user] subst_vars([1410, 0], [1410, 0], [], [])
   Call: (260) [system] var([1410, 0])
^  Redo: (259) [user] subst_vars([1410, 0], _81076, [], _66138)
^  Unify: (259) [user] subst_vars([1410, 0], [_96946|_96948], [], _66138)
^  Call: (260) [user] subst_vars(1410, _96946, [], _97886)
^  Unify: (260) [user] subst_vars(1410, 1410, [], [])
   Call: (261) [system] var(1410)
^  Redo: (260) [user] subst_vars(1410, _96946, [], _97886)
^  Unify: (260) [user] subst_vars(1410, _96946, [], _97886)
   Call: (261) [system] atom(1410)
^  Redo: (260) [user] subst_vars(1410, _96946, [], _97886)
^  Unify: (260) [user] subst_vars(1410, _96946, [], _97886)
   Call: (261) [system] compound(1410)
^  Redo: (260) [user] subst_vars(1410, _96946, [], _97886)
^  Unify: (260) [user] subst_vars(1410, 1410, [], [])
^  Exit: (260) [user] subst_vars(1410, 1410, [], [])
^  Call: (260) [user] subst_vars([0], _96948, [], _66138)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _96948, [], _66138)
^  Unify: (260) [user] subst_vars([0], [_112818|_112820], [], _66138)
^  Call: (261) [user] subst_vars(0, _112818, [], _113758)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _112818, [], _113758)
^  Unify: (261) [user] subst_vars(0, _112818, [], _113758)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _112818, [], _113758)
^  Unify: (261) [user] subst_vars(0, _112818, [], _113758)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _112818, [], _113758)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _112820, [], _66138)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _112820, [], _66138)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1410, 0], [1410, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0], [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0], [], [])
   Call: (258) [system] compound_name_arguments(_66136, '$COMMENT', [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT', [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), [], [])
   Call: (257) [system] _136176=metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1410, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1411, 0, 50705, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$stream_position'(50705, 1411, 0, 50739)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _188902))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _188902))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _188902)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _188902)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _188902)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _188902)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _194514))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _194514))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _194514))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _194514))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _194514)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _194514)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _200100))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _200100))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _200100)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _200100)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _200100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _200100)
   Call: (270) [system] var('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _200100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$VAR'(_207560))
   Call: (270) [system] atom('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _200100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _200100)
   Call: (270) [system] '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _200100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _200100)
   Call: (270) [system] '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _200100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _200100)
   Call: (270) [system] '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0)==[_216840, _216846]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _200100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _200100)
   Call: (270) [system] is_list('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _200100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _200100)
   Call: (270) [system] string('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _200100)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _200100)
   Call: (270) [system] compound('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _227042, _227044)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT', [";;        let parser = SExprParser::new(\"", 1411, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        let parser = SExprParser::new(\"", 1411, 0], _230784)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let parser = SExprParser::new(\"", 1411, 0], _230784)
   Call: (271) [apply] apply:maplist_([";;        let parser = SExprParser::new(\"", 1411, 0], _230784, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        let parser = SExprParser::new(\"", 1411, 0], [_233602|_233604], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _233602)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _233602)
   Call: (273) [system] var(";;        let parser = SExprParser::new(\"")
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _233602)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", '$VAR'(_238248))
   Call: (273) [system] atom(";;        let parser = SExprParser::new(\"")
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _233602)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _233602)
   Call: (273) [system] ";;        let parser = SExprParser::new(\""==true
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _233602)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _233602)
   Call: (273) [system] ";;        let parser = SExprParser::new(\""==false
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _233602)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _233602)
   Call: (273) [system] ";;        let parser = SExprParser::new(\""==[_247528, _247534]
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _233602)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _233602)
   Call: (273) [system] is_list(";;        let parser = SExprParser::new(\"")
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _233602)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _233602)
   Call: (273) [system] string(";;        let parser = SExprParser::new(\"")
   Exit: (273) [system] string(";;        let parser = SExprParser::new(\"")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _233602)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _233602)
   Call: (273) [system] compound(";;        let parser = SExprParser::new(\"")
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _233602)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _233602)
^  Call: (273) [user] symbol(";;        let parser = SExprParser::new(\"")
^  Unify: (273) [user] symbol(";;        let parser = SExprParser::new(\"")
   Call: (274) [system] atom(";;        let parser = SExprParser::new(\"")
   Fail: (274) [system] atom(";;        let parser = SExprParser::new(\"")
^  Fail: (273) [user] symbol(";;        let parser = SExprParser::new(\"")
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _233602)
   Call: (273) [system] ";;        let parser = SExprParser::new(\""=_233602
   Exit: (273) [system] ";;        let parser = SExprParser::new(\""=";;        let parser = SExprParser::new(\""
^  Exit: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", ";;        let parser = SExprParser::new(\"")
   Call: (272) [apply] apply:maplist_([1411, 0], _233604, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1411, 0], [_271600|_271602], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1411, _271600)
^  Unify: (273) [user] mfix_vars1(1411, _271600)
   Call: (274) [system] var(1411)
^  Redo: (273) [user] mfix_vars1(1411, _271600)
^  Unify: (273) [user] mfix_vars1(1411, '$VAR'(_276246))
   Call: (274) [system] atom(1411)
^  Redo: (273) [user] mfix_vars1(1411, _271600)
^  Unify: (273) [user] mfix_vars1(1411, _271600)
   Call: (274) [system] 1411==true
^  Redo: (273) [user] mfix_vars1(1411, _271600)
^  Unify: (273) [user] mfix_vars1(1411, _271600)
   Call: (274) [system] 1411==false
^  Redo: (273) [user] mfix_vars1(1411, _271600)
^  Unify: (273) [user] mfix_vars1(1411, _271600)
   Call: (274) [system] 1411==[_285526, _285532]
^  Redo: (273) [user] mfix_vars1(1411, _271600)
^  Unify: (273) [user] mfix_vars1(1411, _271600)
   Call: (274) [system] is_list(1411)
^  Redo: (273) [user] mfix_vars1(1411, _271600)
^  Unify: (273) [user] mfix_vars1(1411, _271600)
   Call: (274) [system] string(1411)
^  Redo: (273) [user] mfix_vars1(1411, _271600)
^  Unify: (273) [user] mfix_vars1(1411, _271600)
   Call: (274) [system] compound(1411)
^  Redo: (273) [user] mfix_vars1(1411, _271600)
^  Unify: (273) [user] mfix_vars1(1411, _271600)
^  Call: (274) [user] symbol(1411)
^  Unify: (274) [user] symbol(1411)
   Call: (275) [system] atom(1411)
   Fail: (275) [system] atom(1411)
^  Fail: (274) [user] symbol(1411)
^  Redo: (273) [user] mfix_vars1(1411, _271600)
   Call: (274) [system] 1411=_271600
   Exit: (274) [system] 1411=1411
^  Exit: (273) [user] mfix_vars1(1411, 1411)
   Call: (273) [apply] apply:maplist_([0], _271602, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_305926|_305928], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _305926)
^  Unify: (274) [user] mfix_vars1(0, _305926)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _305926)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_310572))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _305926)
^  Unify: (274) [user] mfix_vars1(0, _305926)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _305926)
^  Unify: (274) [user] mfix_vars1(0, _305926)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _305926)
^  Unify: (274) [user] mfix_vars1(0, _305926)
   Call: (275) [system] 0==[_319852, _319858]
^  Redo: (274) [user] mfix_vars1(0, _305926)
^  Unify: (274) [user] mfix_vars1(0, _305926)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _305926)
^  Unify: (274) [user] mfix_vars1(0, _305926)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _305926)
^  Unify: (274) [user] mfix_vars1(0, _305926)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _305926)
^  Unify: (274) [user] mfix_vars1(0, _305926)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _305926)
   Call: (275) [system] 0=_305926
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _305928, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1411, 0], [1411, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        let parser = SExprParser::new(\"", 1411, 0], [";;        let parser = SExprParser::new(\"", 1411, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let parser = SExprParser::new(\"", 1411, 0], [";;        let parser = SExprParser::new(\"", 1411, 0])
   Call: (270) [system] compound_name_arguments(_200100, '$COMMENT', [";;        let parser = SExprParser::new(\"", 1411, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT', [";;        let parser = SExprParser::new(\"", 1411, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0)))
   Call: (267) [system] '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0)\=@='$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _194514)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _356100))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _356100))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _356100))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _356100))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _356100)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _356100)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _361686))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _361686))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _361686)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _361686)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _361686)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0)))
   Call: (267) [system] '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0)\=@='$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _356100)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _188902))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _188902))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _188902))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _188902))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _188902)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _188902)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _384006))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _384006))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _384006)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _384006)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _384006)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0)))
   Call: (267) [system] '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0)\=@='$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _188902)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0)))
   Call: (261) [system] '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0)\=@='$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _412784, [], _412786)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _412784, [], _412786)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _412784, [], _412786)
   Call: (258) [system] atom('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _412784, [], _412786)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _412784, [], _412786)
   Call: (258) [system] compound('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), _422100, _422102)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT', [";;        let parser = SExprParser::new(\"", 1411, 0])
^  Call: (258) [user] subst_vars([";;        let parser = SExprParser::new(\"", 1411, 0], _423986, [], _412786)
^  Unify: (258) [user] subst_vars([";;        let parser = SExprParser::new(\"", 1411, 0], [";;        let parser = SExprParser::new(\"", 1411, 0], [], [])
   Call: (259) [system] var([";;        let parser = SExprParser::new(\"", 1411, 0])
^  Redo: (258) [user] subst_vars([";;        let parser = SExprParser::new(\"", 1411, 0], _423986, [], _412786)
^  Unify: (258) [user] subst_vars([";;        let parser = SExprParser::new(\"", 1411, 0], [_427722|_427724], [], _412786)
^  Call: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", _427722, [], _428662)
^  Unify: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", ";;        let parser = SExprParser::new(\"", [], [])
   Call: (260) [system] var(";;        let parser = SExprParser::new(\"")
^  Redo: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", _427722, [], _428662)
^  Unify: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", _427722, [], _428662)
   Call: (260) [system] atom(";;        let parser = SExprParser::new(\"")
^  Redo: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", _427722, [], _428662)
^  Unify: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", _427722, [], _428662)
   Call: (260) [system] compound(";;        let parser = SExprParser::new(\"")
^  Redo: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", _427722, [], _428662)
^  Unify: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", ";;        let parser = SExprParser::new(\"", [], [])
^  Exit: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", ";;        let parser = SExprParser::new(\"", [], [])
^  Call: (259) [user] subst_vars([1411, 0], _427724, [], _412786)
^  Unify: (259) [user] subst_vars([1411, 0], [1411, 0], [], [])
   Call: (260) [system] var([1411, 0])
^  Redo: (259) [user] subst_vars([1411, 0], _427724, [], _412786)
^  Unify: (259) [user] subst_vars([1411, 0], [_443594|_443596], [], _412786)
^  Call: (260) [user] subst_vars(1411, _443594, [], _444534)
^  Unify: (260) [user] subst_vars(1411, 1411, [], [])
   Call: (261) [system] var(1411)
^  Redo: (260) [user] subst_vars(1411, _443594, [], _444534)
^  Unify: (260) [user] subst_vars(1411, _443594, [], _444534)
   Call: (261) [system] atom(1411)
^  Redo: (260) [user] subst_vars(1411, _443594, [], _444534)
^  Unify: (260) [user] subst_vars(1411, _443594, [], _444534)
   Call: (261) [system] compound(1411)
^  Redo: (260) [user] subst_vars(1411, _443594, [], _444534)
^  Unify: (260) [user] subst_vars(1411, 1411, [], [])
^  Exit: (260) [user] subst_vars(1411, 1411, [], [])
^  Call: (260) [user] subst_vars([0], _443596, [], _412786)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _443596, [], _412786)
^  Unify: (260) [user] subst_vars([0], [_459466|_459468], [], _412786)
^  Call: (261) [user] subst_vars(0, _459466, [], _460406)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _459466, [], _460406)
^  Unify: (261) [user] subst_vars(0, _459466, [], _460406)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _459466, [], _460406)
^  Unify: (261) [user] subst_vars(0, _459466, [], _460406)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _459466, [], _460406)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _459468, [], _412786)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _459468, [], _412786)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1411, 0], [1411, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        let parser = SExprParser::new(\"", 1411, 0], [";;        let parser = SExprParser::new(\"", 1411, 0], [], [])
   Call: (258) [system] compound_name_arguments(_412784, '$COMMENT', [";;        let parser = SExprParser::new(\"", 1411, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT', [";;        let parser = SExprParser::new(\"", 1411, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), [], [])
   Call: (257) [system] _482824=metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1411, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1412, 0, 50747, '$COMMENT'(";;            (= (foo) a)", 1412, 0), '$stream_position'(50747, 1412, 0, 50781)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _18282))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _18282))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _18282)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _18282)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            (= (foo) a)", 1412, 0), _18282)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            (= (foo) a)", 1412, 0), _18282)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _23894))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _23894))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _23894))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _23894))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _23894)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _23894)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _29480))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _29480))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _29480)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _29480)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) a)", 1412, 0), _29480)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) a)", 1412, 0), _29480)
   Call: (270) [system] var('$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) a)", 1412, 0), _29480)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) a)", 1412, 0), '$VAR'(_36940))
   Call: (270) [system] atom('$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) a)", 1412, 0), _29480)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) a)", 1412, 0), _29480)
   Call: (270) [system] '$COMMENT'(";;            (= (foo) a)", 1412, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) a)", 1412, 0), _29480)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) a)", 1412, 0), _29480)
   Call: (270) [system] '$COMMENT'(";;            (= (foo) a)", 1412, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) a)", 1412, 0), _29480)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) a)", 1412, 0), _29480)
   Call: (270) [system] '$COMMENT'(";;            (= (foo) a)", 1412, 0)==[_46220, _46226]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) a)", 1412, 0), _29480)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) a)", 1412, 0), _29480)
   Call: (270) [system] is_list('$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) a)", 1412, 0), _29480)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) a)", 1412, 0), _29480)
   Call: (270) [system] string('$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) a)", 1412, 0), _29480)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) a)", 1412, 0), _29480)
   Call: (270) [system] compound('$COMMENT'(";;            (= (foo) a)", 1412, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            (= (foo) a)", 1412, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            (= (foo) a)", 1412, 0), _56422, _56424)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT', [";;            (= (foo) a)", 1412, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            (= (foo) a)", 1412, 0], _60164)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            (= (foo) a)", 1412, 0], _60164)
   Call: (271) [apply] apply:maplist_([";;            (= (foo) a)", 1412, 0], _60164, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            (= (foo) a)", 1412, 0], [_62982|_62984], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            (= (foo) a)", _62982)
^  Unify: (272) [user] mfix_vars1(";;            (= (foo) a)", _62982)
   Call: (273) [system] var(";;            (= (foo) a)")
^  Redo: (272) [user] mfix_vars1(";;            (= (foo) a)", _62982)
^  Unify: (272) [user] mfix_vars1(";;            (= (foo) a)", '$VAR'(_67628))
   Call: (273) [system] atom(";;            (= (foo) a)")
^  Redo: (272) [user] mfix_vars1(";;            (= (foo) a)", _62982)
^  Unify: (272) [user] mfix_vars1(";;            (= (foo) a)", _62982)
   Call: (273) [system] ";;            (= (foo) a)"==true
^  Redo: (272) [user] mfix_vars1(";;            (= (foo) a)", _62982)
^  Unify: (272) [user] mfix_vars1(";;            (= (foo) a)", _62982)
   Call: (273) [system] ";;            (= (foo) a)"==false
^  Redo: (272) [user] mfix_vars1(";;            (= (foo) a)", _62982)
^  Unify: (272) [user] mfix_vars1(";;            (= (foo) a)", _62982)
   Call: (273) [system] ";;            (= (foo) a)"==[_76908, _76914]
^  Redo: (272) [user] mfix_vars1(";;            (= (foo) a)", _62982)
^  Unify: (272) [user] mfix_vars1(";;            (= (foo) a)", _62982)
   Call: (273) [system] is_list(";;            (= (foo) a)")
^  Redo: (272) [user] mfix_vars1(";;            (= (foo) a)", _62982)
^  Unify: (272) [user] mfix_vars1(";;            (= (foo) a)", _62982)
   Call: (273) [system] string(";;            (= (foo) a)")
   Exit: (273) [system] string(";;            (= (foo) a)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            (= (foo) a)", _62982)
^  Unify: (272) [user] mfix_vars1(";;            (= (foo) a)", _62982)
   Call: (273) [system] compound(";;            (= (foo) a)")
^  Redo: (272) [user] mfix_vars1(";;            (= (foo) a)", _62982)
^  Unify: (272) [user] mfix_vars1(";;            (= (foo) a)", _62982)
^  Call: (273) [user] symbol(";;            (= (foo) a)")
^  Unify: (273) [user] symbol(";;            (= (foo) a)")
   Call: (274) [system] atom(";;            (= (foo) a)")
   Fail: (274) [system] atom(";;            (= (foo) a)")
^  Fail: (273) [user] symbol(";;            (= (foo) a)")
^  Redo: (272) [user] mfix_vars1(";;            (= (foo) a)", _62982)
   Call: (273) [system] ";;            (= (foo) a)"=_62982
   Exit: (273) [system] ";;            (= (foo) a)"=";;            (= (foo) a)"
^  Exit: (272) [user] mfix_vars1(";;            (= (foo) a)", ";;            (= (foo) a)")
   Call: (272) [apply] apply:maplist_([1412, 0], _62984, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1412, 0], [_100980|_100982], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1412, _100980)
^  Unify: (273) [user] mfix_vars1(1412, _100980)
   Call: (274) [system] var(1412)
^  Redo: (273) [user] mfix_vars1(1412, _100980)
^  Unify: (273) [user] mfix_vars1(1412, '$VAR'(_105626))
   Call: (274) [system] atom(1412)
^  Redo: (273) [user] mfix_vars1(1412, _100980)
^  Unify: (273) [user] mfix_vars1(1412, _100980)
   Call: (274) [system] 1412==true
^  Redo: (273) [user] mfix_vars1(1412, _100980)
^  Unify: (273) [user] mfix_vars1(1412, _100980)
   Call: (274) [system] 1412==false
^  Redo: (273) [user] mfix_vars1(1412, _100980)
^  Unify: (273) [user] mfix_vars1(1412, _100980)
   Call: (274) [system] 1412==[_114906, _114912]
^  Redo: (273) [user] mfix_vars1(1412, _100980)
^  Unify: (273) [user] mfix_vars1(1412, _100980)
   Call: (274) [system] is_list(1412)
^  Redo: (273) [user] mfix_vars1(1412, _100980)
^  Unify: (273) [user] mfix_vars1(1412, _100980)
   Call: (274) [system] string(1412)
^  Redo: (273) [user] mfix_vars1(1412, _100980)
^  Unify: (273) [user] mfix_vars1(1412, _100980)
   Call: (274) [system] compound(1412)
^  Redo: (273) [user] mfix_vars1(1412, _100980)
^  Unify: (273) [user] mfix_vars1(1412, _100980)
^  Call: (274) [user] symbol(1412)
^  Unify: (274) [user] symbol(1412)
   Call: (275) [system] atom(1412)
   Fail: (275) [system] atom(1412)
^  Fail: (274) [user] symbol(1412)
^  Redo: (273) [user] mfix_vars1(1412, _100980)
   Call: (274) [system] 1412=_100980
   Exit: (274) [system] 1412=1412
^  Exit: (273) [user] mfix_vars1(1412, 1412)
   Call: (273) [apply] apply:maplist_([0], _100982, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_135306|_135308], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _135306)
^  Unify: (274) [user] mfix_vars1(0, _135306)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _135306)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_139952))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _135306)
^  Unify: (274) [user] mfix_vars1(0, _135306)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _135306)
^  Unify: (274) [user] mfix_vars1(0, _135306)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _135306)
^  Unify: (274) [user] mfix_vars1(0, _135306)
   Call: (275) [system] 0==[_149232, _149238]
^  Redo: (274) [user] mfix_vars1(0, _135306)
^  Unify: (274) [user] mfix_vars1(0, _135306)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _135306)
^  Unify: (274) [user] mfix_vars1(0, _135306)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _135306)
^  Unify: (274) [user] mfix_vars1(0, _135306)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _135306)
^  Unify: (274) [user] mfix_vars1(0, _135306)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _135306)
   Call: (275) [system] 0=_135306
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _135308, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1412, 0], [1412, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            (= (foo) a)", 1412, 0], [";;            (= (foo) a)", 1412, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            (= (foo) a)", 1412, 0], [";;            (= (foo) a)", 1412, 0])
   Call: (270) [system] compound_name_arguments(_29480, '$COMMENT', [";;            (= (foo) a)", 1412, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT', [";;            (= (foo) a)", 1412, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0)))
   Call: (267) [system] '$COMMENT'(";;            (= (foo) a)", 1412, 0)\=@='$COMMENT'(";;            (= (foo) a)", 1412, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _23894)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _185480))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _185480))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _185480))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _185480))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _185480)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _185480)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _191066))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _191066))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _191066)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _191066)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            (= (foo) a)", 1412, 0), _191066)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0)))
   Call: (267) [system] '$COMMENT'(";;            (= (foo) a)", 1412, 0)\=@='$COMMENT'(";;            (= (foo) a)", 1412, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _185480)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _18282))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _18282))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _18282))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _18282))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _18282)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _18282)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _213386))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _213386))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _213386)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _213386)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            (= (foo) a)", 1412, 0), _213386)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0)))
   Call: (267) [system] '$COMMENT'(";;            (= (foo) a)", 1412, 0)\=@='$COMMENT'(";;            (= (foo) a)", 1412, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _18282)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0)))
   Call: (261) [system] '$COMMENT'(";;            (= (foo) a)", 1412, 0)\=@='$COMMENT'(";;            (= (foo) a)", 1412, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (= (foo) a)", 1412, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            (= (foo) a)", 1412, 0), _242164, [], _242166)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            (= (foo) a)", 1412, 0), _242164, [], _242166)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            (= (foo) a)", 1412, 0), _242164, [], _242166)
   Call: (258) [system] atom('$COMMENT'(";;            (= (foo) a)", 1412, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            (= (foo) a)", 1412, 0), _242164, [], _242166)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            (= (foo) a)", 1412, 0), _242164, [], _242166)
   Call: (258) [system] compound('$COMMENT'(";;            (= (foo) a)", 1412, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            (= (foo) a)", 1412, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            (= (foo) a)", 1412, 0), _251480, _251482)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT', [";;            (= (foo) a)", 1412, 0])
^  Call: (258) [user] subst_vars([";;            (= (foo) a)", 1412, 0], _253366, [], _242166)
^  Unify: (258) [user] subst_vars([";;            (= (foo) a)", 1412, 0], [";;            (= (foo) a)", 1412, 0], [], [])
   Call: (259) [system] var([";;            (= (foo) a)", 1412, 0])
^  Redo: (258) [user] subst_vars([";;            (= (foo) a)", 1412, 0], _253366, [], _242166)
^  Unify: (258) [user] subst_vars([";;            (= (foo) a)", 1412, 0], [_257102|_257104], [], _242166)
^  Call: (259) [user] subst_vars(";;            (= (foo) a)", _257102, [], _258042)
^  Unify: (259) [user] subst_vars(";;            (= (foo) a)", ";;            (= (foo) a)", [], [])
   Call: (260) [system] var(";;            (= (foo) a)")
^  Redo: (259) [user] subst_vars(";;            (= (foo) a)", _257102, [], _258042)
^  Unify: (259) [user] subst_vars(";;            (= (foo) a)", _257102, [], _258042)
   Call: (260) [system] atom(";;            (= (foo) a)")
^  Redo: (259) [user] subst_vars(";;            (= (foo) a)", _257102, [], _258042)
^  Unify: (259) [user] subst_vars(";;            (= (foo) a)", _257102, [], _258042)
   Call: (260) [system] compound(";;            (= (foo) a)")
^  Redo: (259) [user] subst_vars(";;            (= (foo) a)", _257102, [], _258042)
^  Unify: (259) [user] subst_vars(";;            (= (foo) a)", ";;            (= (foo) a)", [], [])
^  Exit: (259) [user] subst_vars(";;            (= (foo) a)", ";;            (= (foo) a)", [], [])
^  Call: (259) [user] subst_vars([1412, 0], _257104, [], _242166)
^  Unify: (259) [user] subst_vars([1412, 0], [1412, 0], [], [])
   Call: (260) [system] var([1412, 0])
^  Redo: (259) [user] subst_vars([1412, 0], _257104, [], _242166)
^  Unify: (259) [user] subst_vars([1412, 0], [_272974|_272976], [], _242166)
^  Call: (260) [user] subst_vars(1412, _272974, [], _273914)
^  Unify: (260) [user] subst_vars(1412, 1412, [], [])
   Call: (261) [system] var(1412)
^  Redo: (260) [user] subst_vars(1412, _272974, [], _273914)
^  Unify: (260) [user] subst_vars(1412, _272974, [], _273914)
   Call: (261) [system] atom(1412)
^  Redo: (260) [user] subst_vars(1412, _272974, [], _273914)
^  Unify: (260) [user] subst_vars(1412, _272974, [], _273914)
   Call: (261) [system] compound(1412)
^  Redo: (260) [user] subst_vars(1412, _272974, [], _273914)
^  Unify: (260) [user] subst_vars(1412, 1412, [], [])
^  Exit: (260) [user] subst_vars(1412, 1412, [], [])
^  Call: (260) [user] subst_vars([0], _272976, [], _242166)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _272976, [], _242166)
^  Unify: (260) [user] subst_vars([0], [_288846|_288848], [], _242166)
^  Call: (261) [user] subst_vars(0, _288846, [], _289786)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _288846, [], _289786)
^  Unify: (261) [user] subst_vars(0, _288846, [], _289786)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _288846, [], _289786)
^  Unify: (261) [user] subst_vars(0, _288846, [], _289786)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _288846, [], _289786)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _288848, [], _242166)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _288848, [], _242166)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1412, 0], [1412, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            (= (foo) a)", 1412, 0], [";;            (= (foo) a)", 1412, 0], [], [])
   Call: (258) [system] compound_name_arguments(_242164, '$COMMENT', [";;            (= (foo) a)", 1412, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT', [";;            (= (foo) a)", 1412, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            (= (foo) a)", 1412, 0), '$COMMENT'(";;            (= (foo) a)", 1412, 0), [], [])
   Call: (257) [system] _312204=metta_file_buffer(+, '$COMMENT'(";;            (= (foo) a)", 1412, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            (= (foo) a)", 1412, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            (= (foo) a)", 1412, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            (= (foo) a)", 1412, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            (= (foo) a)", 1412, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (= (foo) a)", 1412, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (= (foo) a)", 1412, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (= (foo) a)", 1412, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (= (foo) a)", 1412, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1413, 0, 50773, '$COMMENT'(";;            (= (foo) b)", 1413, 0), '$stream_position'(50773, 1413, 0, 50807)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _364926))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _364926))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _364926)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _364926)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            (= (foo) b)", 1413, 0), _364926)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            (= (foo) b)", 1413, 0), _364926)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _370538))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _370538))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _370538))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _370538))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _370538)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _370538)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _376124))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _376124))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _376124)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _376124)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) b)", 1413, 0), _376124)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) b)", 1413, 0), _376124)
   Call: (270) [system] var('$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) b)", 1413, 0), _376124)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) b)", 1413, 0), '$VAR'(_383584))
   Call: (270) [system] atom('$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) b)", 1413, 0), _376124)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) b)", 1413, 0), _376124)
   Call: (270) [system] '$COMMENT'(";;            (= (foo) b)", 1413, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) b)", 1413, 0), _376124)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) b)", 1413, 0), _376124)
   Call: (270) [system] '$COMMENT'(";;            (= (foo) b)", 1413, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) b)", 1413, 0), _376124)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) b)", 1413, 0), _376124)
   Call: (270) [system] '$COMMENT'(";;            (= (foo) b)", 1413, 0)==[_392864, _392870]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) b)", 1413, 0), _376124)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) b)", 1413, 0), _376124)
   Call: (270) [system] is_list('$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) b)", 1413, 0), _376124)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) b)", 1413, 0), _376124)
   Call: (270) [system] string('$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) b)", 1413, 0), _376124)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) b)", 1413, 0), _376124)
   Call: (270) [system] compound('$COMMENT'(";;            (= (foo) b)", 1413, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            (= (foo) b)", 1413, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            (= (foo) b)", 1413, 0), _403066, _403068)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT', [";;            (= (foo) b)", 1413, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            (= (foo) b)", 1413, 0], _406808)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            (= (foo) b)", 1413, 0], _406808)
   Call: (271) [apply] apply:maplist_([";;            (= (foo) b)", 1413, 0], _406808, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            (= (foo) b)", 1413, 0], [_409626|_409628], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            (= (foo) b)", _409626)
^  Unify: (272) [user] mfix_vars1(";;            (= (foo) b)", _409626)
   Call: (273) [system] var(";;            (= (foo) b)")
^  Redo: (272) [user] mfix_vars1(";;            (= (foo) b)", _409626)
^  Unify: (272) [user] mfix_vars1(";;            (= (foo) b)", '$VAR'(_414272))
   Call: (273) [system] atom(";;            (= (foo) b)")
^  Redo: (272) [user] mfix_vars1(";;            (= (foo) b)", _409626)
^  Unify: (272) [user] mfix_vars1(";;            (= (foo) b)", _409626)
   Call: (273) [system] ";;            (= (foo) b)"==true
^  Redo: (272) [user] mfix_vars1(";;            (= (foo) b)", _409626)
^  Unify: (272) [user] mfix_vars1(";;            (= (foo) b)", _409626)
   Call: (273) [system] ";;            (= (foo) b)"==false
^  Redo: (272) [user] mfix_vars1(";;            (= (foo) b)", _409626)
^  Unify: (272) [user] mfix_vars1(";;            (= (foo) b)", _409626)
   Call: (273) [system] ";;            (= (foo) b)"==[_423552, _423558]
^  Redo: (272) [user] mfix_vars1(";;            (= (foo) b)", _409626)
^  Unify: (272) [user] mfix_vars1(";;            (= (foo) b)", _409626)
   Call: (273) [system] is_list(";;            (= (foo) b)")
^  Redo: (272) [user] mfix_vars1(";;            (= (foo) b)", _409626)
^  Unify: (272) [user] mfix_vars1(";;            (= (foo) b)", _409626)
   Call: (273) [system] string(";;            (= (foo) b)")
   Exit: (273) [system] string(";;            (= (foo) b)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            (= (foo) b)", _409626)
^  Unify: (272) [user] mfix_vars1(";;            (= (foo) b)", _409626)
   Call: (273) [system] compound(";;            (= (foo) b)")
^  Redo: (272) [user] mfix_vars1(";;            (= (foo) b)", _409626)
^  Unify: (272) [user] mfix_vars1(";;            (= (foo) b)", _409626)
^  Call: (273) [user] symbol(";;            (= (foo) b)")
^  Unify: (273) [user] symbol(";;            (= (foo) b)")
   Call: (274) [system] atom(";;            (= (foo) b)")
   Fail: (274) [system] atom(";;            (= (foo) b)")
^  Fail: (273) [user] symbol(";;            (= (foo) b)")
^  Redo: (272) [user] mfix_vars1(";;            (= (foo) b)", _409626)
   Call: (273) [system] ";;            (= (foo) b)"=_409626
   Exit: (273) [system] ";;            (= (foo) b)"=";;            (= (foo) b)"
^  Exit: (272) [user] mfix_vars1(";;            (= (foo) b)", ";;            (= (foo) b)")
   Call: (272) [apply] apply:maplist_([1413, 0], _409628, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1413, 0], [_447624|_447626], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1413, _447624)
^  Unify: (273) [user] mfix_vars1(1413, _447624)
   Call: (274) [system] var(1413)
^  Redo: (273) [user] mfix_vars1(1413, _447624)
^  Unify: (273) [user] mfix_vars1(1413, '$VAR'(_452270))
   Call: (274) [system] atom(1413)
^  Redo: (273) [user] mfix_vars1(1413, _447624)
^  Unify: (273) [user] mfix_vars1(1413, _447624)
   Call: (274) [system] 1413==true
^  Redo: (273) [user] mfix_vars1(1413, _447624)
^  Unify: (273) [user] mfix_vars1(1413, _447624)
   Call: (274) [system] 1413==false
^  Redo: (273) [user] mfix_vars1(1413, _447624)
^  Unify: (273) [user] mfix_vars1(1413, _447624)
   Call: (274) [system] 1413==[_461550, _461556]
^  Redo: (273) [user] mfix_vars1(1413, _447624)
^  Unify: (273) [user] mfix_vars1(1413, _447624)
   Call: (274) [system] is_list(1413)
^  Redo: (273) [user] mfix_vars1(1413, _447624)
^  Unify: (273) [user] mfix_vars1(1413, _447624)
   Call: (274) [system] string(1413)
^  Redo: (273) [user] mfix_vars1(1413, _447624)
^  Unify: (273) [user] mfix_vars1(1413, _447624)
   Call: (274) [system] compound(1413)
^  Redo: (273) [user] mfix_vars1(1413, _447624)
^  Unify: (273) [user] mfix_vars1(1413, _447624)
^  Call: (274) [user] symbol(1413)
^  Unify: (274) [user] symbol(1413)
   Call: (275) [system] atom(1413)
   Fail: (275) [system] atom(1413)
^  Fail: (274) [user] symbol(1413)
^  Redo: (273) [user] mfix_vars1(1413, _447624)
   Call: (274) [system] 1413=_447624
   Exit: (274) [system] 1413=1413
^  Exit: (273) [user] mfix_vars1(1413, 1413)
   Call: (273) [apply] apply:maplist_([0], _447626, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_481950|_481952], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _481950)
^  Unify: (274) [user] mfix_vars1(0, _481950)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _481950)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_486596))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _481950)
^  Unify: (274) [user] mfix_vars1(0, _481950)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _481950)
^  Unify: (274) [user] mfix_vars1(0, _481950)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _481950)
^  Unify: (274) [user] mfix_vars1(0, _481950)
   Call: (275) [system] 0==[_495876, _495882]
^  Redo: (274) [user] mfix_vars1(0, _481950)
^  Unify: (274) [user] mfix_vars1(0, _481950)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _481950)
^  Unify: (274) [user] mfix_vars1(0, _481950)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _481950)
^  Unify: (274) [user] mfix_vars1(0, _481950)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _481950)
^  Unify: (274) [user] mfix_vars1(0, _481950)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _481950)
   Call: (275) [system] 0=_481950
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _481952, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1413, 0], [1413, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            (= (foo) b)", 1413, 0], [";;            (= (foo) b)", 1413, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            (= (foo) b)", 1413, 0], [";;            (= (foo) b)", 1413, 0])
   Call: (270) [system] compound_name_arguments(_376124, '$COMMENT', [";;            (= (foo) b)", 1413, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT', [";;            (= (foo) b)", 1413, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0)))
   Call: (267) [system] '$COMMENT'(";;            (= (foo) b)", 1413, 0)\=@='$COMMENT'(";;            (= (foo) b)", 1413, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _5968)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _14244))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _14244))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _14244))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _14244))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _14244)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _14244)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _19830))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _19830))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _19830)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _19830)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            (= (foo) b)", 1413, 0), _19830)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0)))
   Call: (267) [system] '$COMMENT'(";;            (= (foo) b)", 1413, 0)\=@='$COMMENT'(";;            (= (foo) b)", 1413, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _14244)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _5948))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _5948))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _5948))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _5948))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _5948)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _42150))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _42150))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _42150)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _42150)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            (= (foo) b)", 1413, 0), _42150)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0)))
   Call: (267) [system] '$COMMENT'(";;            (= (foo) b)", 1413, 0)\=@='$COMMENT'(";;            (= (foo) b)", 1413, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0)))
   Call: (261) [system] '$COMMENT'(";;            (= (foo) b)", 1413, 0)\=@='$COMMENT'(";;            (= (foo) b)", 1413, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (= (foo) b)", 1413, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            (= (foo) b)", 1413, 0), _70928, [], _70930)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            (= (foo) b)", 1413, 0), _70928, [], _70930)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            (= (foo) b)", 1413, 0), _70928, [], _70930)
   Call: (258) [system] atom('$COMMENT'(";;            (= (foo) b)", 1413, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            (= (foo) b)", 1413, 0), _70928, [], _70930)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            (= (foo) b)", 1413, 0), _70928, [], _70930)
   Call: (258) [system] compound('$COMMENT'(";;            (= (foo) b)", 1413, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            (= (foo) b)", 1413, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            (= (foo) b)", 1413, 0), _80244, _80246)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT', [";;            (= (foo) b)", 1413, 0])
^  Call: (258) [user] subst_vars([";;            (= (foo) b)", 1413, 0], _82130, [], _70930)
^  Unify: (258) [user] subst_vars([";;            (= (foo) b)", 1413, 0], [";;            (= (foo) b)", 1413, 0], [], [])
   Call: (259) [system] var([";;            (= (foo) b)", 1413, 0])
^  Redo: (258) [user] subst_vars([";;            (= (foo) b)", 1413, 0], _82130, [], _70930)
^  Unify: (258) [user] subst_vars([";;            (= (foo) b)", 1413, 0], [_85866|_85868], [], _70930)
^  Call: (259) [user] subst_vars(";;            (= (foo) b)", _85866, [], _86806)
^  Unify: (259) [user] subst_vars(";;            (= (foo) b)", ";;            (= (foo) b)", [], [])
   Call: (260) [system] var(";;            (= (foo) b)")
^  Redo: (259) [user] subst_vars(";;            (= (foo) b)", _85866, [], _86806)
^  Unify: (259) [user] subst_vars(";;            (= (foo) b)", _85866, [], _86806)
   Call: (260) [system] atom(";;            (= (foo) b)")
^  Redo: (259) [user] subst_vars(";;            (= (foo) b)", _85866, [], _86806)
^  Unify: (259) [user] subst_vars(";;            (= (foo) b)", _85866, [], _86806)
   Call: (260) [system] compound(";;            (= (foo) b)")
^  Redo: (259) [user] subst_vars(";;            (= (foo) b)", _85866, [], _86806)
^  Unify: (259) [user] subst_vars(";;            (= (foo) b)", ";;            (= (foo) b)", [], [])
^  Exit: (259) [user] subst_vars(";;            (= (foo) b)", ";;            (= (foo) b)", [], [])
^  Call: (259) [user] subst_vars([1413, 0], _85868, [], _70930)
^  Unify: (259) [user] subst_vars([1413, 0], [1413, 0], [], [])
   Call: (260) [system] var([1413, 0])
^  Redo: (259) [user] subst_vars([1413, 0], _85868, [], _70930)
^  Unify: (259) [user] subst_vars([1413, 0], [_101738|_101740], [], _70930)
^  Call: (260) [user] subst_vars(1413, _101738, [], _102678)
^  Unify: (260) [user] subst_vars(1413, 1413, [], [])
   Call: (261) [system] var(1413)
^  Redo: (260) [user] subst_vars(1413, _101738, [], _102678)
^  Unify: (260) [user] subst_vars(1413, _101738, [], _102678)
   Call: (261) [system] atom(1413)
^  Redo: (260) [user] subst_vars(1413, _101738, [], _102678)
^  Unify: (260) [user] subst_vars(1413, _101738, [], _102678)
   Call: (261) [system] compound(1413)
^  Redo: (260) [user] subst_vars(1413, _101738, [], _102678)
^  Unify: (260) [user] subst_vars(1413, 1413, [], [])
^  Exit: (260) [user] subst_vars(1413, 1413, [], [])
^  Call: (260) [user] subst_vars([0], _101740, [], _70930)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _101740, [], _70930)
^  Unify: (260) [user] subst_vars([0], [_117610|_117612], [], _70930)
^  Call: (261) [user] subst_vars(0, _117610, [], _118550)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _117610, [], _118550)
^  Unify: (261) [user] subst_vars(0, _117610, [], _118550)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _117610, [], _118550)
^  Unify: (261) [user] subst_vars(0, _117610, [], _118550)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _117610, [], _118550)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _117612, [], _70930)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _117612, [], _70930)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1413, 0], [1413, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            (= (foo) b)", 1413, 0], [";;            (= (foo) b)", 1413, 0], [], [])
   Call: (258) [system] compound_name_arguments(_70928, '$COMMENT', [";;            (= (foo) b)", 1413, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT', [";;            (= (foo) b)", 1413, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            (= (foo) b)", 1413, 0), '$COMMENT'(";;            (= (foo) b)", 1413, 0), [], [])
   Call: (257) [system] _140968=metta_file_buffer(+, '$COMMENT'(";;            (= (foo) b)", 1413, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            (= (foo) b)", 1413, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            (= (foo) b)", 1413, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            (= (foo) b)", 1413, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            (= (foo) b)", 1413, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (= (foo) b)", 1413, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (= (foo) b)", 1413, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (= (foo) b)", 1413, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            (= (foo) b)", 1413, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1414, 0, 50799, '$COMMENT'(";;            !(foo)", 1414, 0), '$stream_position'(50799, 1414, 0, 50833)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(foo)", 1414, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(foo)", 1414, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            !(foo)", 1414, 0), _193688))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            !(foo)", 1414, 0), _193688))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            !(foo)", 1414, 0), _193688)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            !(foo)", 1414, 0), _193688)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            !(foo)", 1414, 0), _193688)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            !(foo)", 1414, 0), _193688)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            !(foo)", 1414, 0), _199300))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            !(foo)", 1414, 0), _199300))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(foo)", 1414, 0), _199300))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(foo)", 1414, 0), _199300))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(foo)", 1414, 0), _199300)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(foo)", 1414, 0), _199300)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            !(foo)", 1414, 0), _204886))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            !(foo)", 1414, 0), _204886))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            !(foo)", 1414, 0), _204886)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            !(foo)", 1414, 0), _204886)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            !(foo)", 1414, 0), _204886)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(foo)", 1414, 0), _204886)
   Call: (270) [system] var('$COMMENT'(";;            !(foo)", 1414, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(foo)", 1414, 0), _204886)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(foo)", 1414, 0), '$VAR'(_212346))
   Call: (270) [system] atom('$COMMENT'(";;            !(foo)", 1414, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(foo)", 1414, 0), _204886)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(foo)", 1414, 0), _204886)
   Call: (270) [system] '$COMMENT'(";;            !(foo)", 1414, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(foo)", 1414, 0), _204886)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(foo)", 1414, 0), _204886)
   Call: (270) [system] '$COMMENT'(";;            !(foo)", 1414, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(foo)", 1414, 0), _204886)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(foo)", 1414, 0), _204886)
   Call: (270) [system] '$COMMENT'(";;            !(foo)", 1414, 0)==[_221626, _221632]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(foo)", 1414, 0), _204886)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(foo)", 1414, 0), _204886)
   Call: (270) [system] is_list('$COMMENT'(";;            !(foo)", 1414, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(foo)", 1414, 0), _204886)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(foo)", 1414, 0), _204886)
   Call: (270) [system] string('$COMMENT'(";;            !(foo)", 1414, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(foo)", 1414, 0), _204886)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(foo)", 1414, 0), _204886)
   Call: (270) [system] compound('$COMMENT'(";;            !(foo)", 1414, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            !(foo)", 1414, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            !(foo)", 1414, 0), _231828, _231830)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT', [";;            !(foo)", 1414, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            !(foo)", 1414, 0], _235570)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            !(foo)", 1414, 0], _235570)
   Call: (271) [apply] apply:maplist_([";;            !(foo)", 1414, 0], _235570, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            !(foo)", 1414, 0], [_238388|_238390], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            !(foo)", _238388)
^  Unify: (272) [user] mfix_vars1(";;            !(foo)", _238388)
   Call: (273) [system] var(";;            !(foo)")
^  Redo: (272) [user] mfix_vars1(";;            !(foo)", _238388)
^  Unify: (272) [user] mfix_vars1(";;            !(foo)", '$VAR'(_243034))
   Call: (273) [system] atom(";;            !(foo)")
^  Redo: (272) [user] mfix_vars1(";;            !(foo)", _238388)
^  Unify: (272) [user] mfix_vars1(";;            !(foo)", _238388)
   Call: (273) [system] ";;            !(foo)"==true
^  Redo: (272) [user] mfix_vars1(";;            !(foo)", _238388)
^  Unify: (272) [user] mfix_vars1(";;            !(foo)", _238388)
   Call: (273) [system] ";;            !(foo)"==false
^  Redo: (272) [user] mfix_vars1(";;            !(foo)", _238388)
^  Unify: (272) [user] mfix_vars1(";;            !(foo)", _238388)
   Call: (273) [system] ";;            !(foo)"==[_252314, _252320]
^  Redo: (272) [user] mfix_vars1(";;            !(foo)", _238388)
^  Unify: (272) [user] mfix_vars1(";;            !(foo)", _238388)
   Call: (273) [system] is_list(";;            !(foo)")
^  Redo: (272) [user] mfix_vars1(";;            !(foo)", _238388)
^  Unify: (272) [user] mfix_vars1(";;            !(foo)", _238388)
   Call: (273) [system] string(";;            !(foo)")
   Exit: (273) [system] string(";;            !(foo)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            !(foo)", _238388)
^  Unify: (272) [user] mfix_vars1(";;            !(foo)", _238388)
   Call: (273) [system] compound(";;            !(foo)")
^  Redo: (272) [user] mfix_vars1(";;            !(foo)", _238388)
^  Unify: (272) [user] mfix_vars1(";;            !(foo)", _238388)
^  Call: (273) [user] symbol(";;            !(foo)")
^  Unify: (273) [user] symbol(";;            !(foo)")
   Call: (274) [system] atom(";;            !(foo)")
   Fail: (274) [system] atom(";;            !(foo)")
^  Fail: (273) [user] symbol(";;            !(foo)")
^  Redo: (272) [user] mfix_vars1(";;            !(foo)", _238388)
   Call: (273) [system] ";;            !(foo)"=_238388
   Exit: (273) [system] ";;            !(foo)"=";;            !(foo)"
^  Exit: (272) [user] mfix_vars1(";;            !(foo)", ";;            !(foo)")
   Call: (272) [apply] apply:maplist_([1414, 0], _238390, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1414, 0], [_276386|_276388], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1414, _276386)
^  Unify: (273) [user] mfix_vars1(1414, _276386)
   Call: (274) [system] var(1414)
^  Redo: (273) [user] mfix_vars1(1414, _276386)
^  Unify: (273) [user] mfix_vars1(1414, '$VAR'(_281032))
   Call: (274) [system] atom(1414)
^  Redo: (273) [user] mfix_vars1(1414, _276386)
^  Unify: (273) [user] mfix_vars1(1414, _276386)
   Call: (274) [system] 1414==true
^  Redo: (273) [user] mfix_vars1(1414, _276386)
^  Unify: (273) [user] mfix_vars1(1414, _276386)
   Call: (274) [system] 1414==false
^  Redo: (273) [user] mfix_vars1(1414, _276386)
^  Unify: (273) [user] mfix_vars1(1414, _276386)
   Call: (274) [system] 1414==[_290312, _290318]
^  Redo: (273) [user] mfix_vars1(1414, _276386)
^  Unify: (273) [user] mfix_vars1(1414, _276386)
   Call: (274) [system] is_list(1414)
^  Redo: (273) [user] mfix_vars1(1414, _276386)
^  Unify: (273) [user] mfix_vars1(1414, _276386)
   Call: (274) [system] string(1414)
^  Redo: (273) [user] mfix_vars1(1414, _276386)
^  Unify: (273) [user] mfix_vars1(1414, _276386)
   Call: (274) [system] compound(1414)
^  Redo: (273) [user] mfix_vars1(1414, _276386)
^  Unify: (273) [user] mfix_vars1(1414, _276386)
^  Call: (274) [user] symbol(1414)
^  Unify: (274) [user] symbol(1414)
   Call: (275) [system] atom(1414)
   Fail: (275) [system] atom(1414)
^  Fail: (274) [user] symbol(1414)
^  Redo: (273) [user] mfix_vars1(1414, _276386)
   Call: (274) [system] 1414=_276386
   Exit: (274) [system] 1414=1414
^  Exit: (273) [user] mfix_vars1(1414, 1414)
   Call: (273) [apply] apply:maplist_([0], _276388, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_310712|_310714], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _310712)
^  Unify: (274) [user] mfix_vars1(0, _310712)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _310712)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_315358))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _310712)
^  Unify: (274) [user] mfix_vars1(0, _310712)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _310712)
^  Unify: (274) [user] mfix_vars1(0, _310712)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _310712)
^  Unify: (274) [user] mfix_vars1(0, _310712)
   Call: (275) [system] 0==[_324638, _324644]
^  Redo: (274) [user] mfix_vars1(0, _310712)
^  Unify: (274) [user] mfix_vars1(0, _310712)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _310712)
^  Unify: (274) [user] mfix_vars1(0, _310712)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _310712)
^  Unify: (274) [user] mfix_vars1(0, _310712)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _310712)
^  Unify: (274) [user] mfix_vars1(0, _310712)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _310712)
   Call: (275) [system] 0=_310712
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _310714, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1414, 0], [1414, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            !(foo)", 1414, 0], [";;            !(foo)", 1414, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            !(foo)", 1414, 0], [";;            !(foo)", 1414, 0])
   Call: (270) [system] compound_name_arguments(_204886, '$COMMENT', [";;            !(foo)", 1414, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT', [";;            !(foo)", 1414, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(foo)", 1414, 0)\=@='$COMMENT'(";;            !(foo)", 1414, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(foo)", 1414, 0), _199300)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            !(foo)", 1414, 0), _360886))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            !(foo)", 1414, 0), _360886))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            !(foo)", 1414, 0), _360886))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            !(foo)", 1414, 0), _360886))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(foo)", 1414, 0), _360886)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(foo)", 1414, 0), _360886)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            !(foo)", 1414, 0), _366472))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            !(foo)", 1414, 0), _366472))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            !(foo)", 1414, 0), _366472)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            !(foo)", 1414, 0), _366472)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            !(foo)", 1414, 0), _366472)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(foo)", 1414, 0)\=@='$COMMENT'(";;            !(foo)", 1414, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(foo)", 1414, 0), _360886)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            !(foo)", 1414, 0), _193688))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            !(foo)", 1414, 0), _193688))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            !(foo)", 1414, 0), _193688))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            !(foo)", 1414, 0), _193688))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(foo)", 1414, 0), _193688)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(foo)", 1414, 0), _193688)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            !(foo)", 1414, 0), _388792))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            !(foo)", 1414, 0), _388792))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            !(foo)", 1414, 0), _388792)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            !(foo)", 1414, 0), _388792)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            !(foo)", 1414, 0), _388792)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(foo)", 1414, 0)\=@='$COMMENT'(";;            !(foo)", 1414, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(foo)", 1414, 0), _193688)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0)))
   Call: (261) [system] '$COMMENT'(";;            !(foo)", 1414, 0)\=@='$COMMENT'(";;            !(foo)", 1414, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(foo)", 1414, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(foo)", 1414, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(foo)", 1414, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(foo)", 1414, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(foo)", 1414, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            !(foo)", 1414, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            !(foo)", 1414, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            !(foo)", 1414, 0), _417570, [], _417572)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            !(foo)", 1414, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            !(foo)", 1414, 0), _417570, [], _417572)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(foo)", 1414, 0), _417570, [], _417572)
   Call: (258) [system] atom('$COMMENT'(";;            !(foo)", 1414, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            !(foo)", 1414, 0), _417570, [], _417572)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(foo)", 1414, 0), _417570, [], _417572)
   Call: (258) [system] compound('$COMMENT'(";;            !(foo)", 1414, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            !(foo)", 1414, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            !(foo)", 1414, 0), _426886, _426888)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT', [";;            !(foo)", 1414, 0])
^  Call: (258) [user] subst_vars([";;            !(foo)", 1414, 0], _428772, [], _417572)
^  Unify: (258) [user] subst_vars([";;            !(foo)", 1414, 0], [";;            !(foo)", 1414, 0], [], [])
   Call: (259) [system] var([";;            !(foo)", 1414, 0])
^  Redo: (258) [user] subst_vars([";;            !(foo)", 1414, 0], _428772, [], _417572)
^  Unify: (258) [user] subst_vars([";;            !(foo)", 1414, 0], [_432508|_432510], [], _417572)
^  Call: (259) [user] subst_vars(";;            !(foo)", _432508, [], _433448)
^  Unify: (259) [user] subst_vars(";;            !(foo)", ";;            !(foo)", [], [])
   Call: (260) [system] var(";;            !(foo)")
^  Redo: (259) [user] subst_vars(";;            !(foo)", _432508, [], _433448)
^  Unify: (259) [user] subst_vars(";;            !(foo)", _432508, [], _433448)
   Call: (260) [system] atom(";;            !(foo)")
^  Redo: (259) [user] subst_vars(";;            !(foo)", _432508, [], _433448)
^  Unify: (259) [user] subst_vars(";;            !(foo)", _432508, [], _433448)
   Call: (260) [system] compound(";;            !(foo)")
^  Redo: (259) [user] subst_vars(";;            !(foo)", _432508, [], _433448)
^  Unify: (259) [user] subst_vars(";;            !(foo)", ";;            !(foo)", [], [])
^  Exit: (259) [user] subst_vars(";;            !(foo)", ";;            !(foo)", [], [])
^  Call: (259) [user] subst_vars([1414, 0], _432510, [], _417572)
^  Unify: (259) [user] subst_vars([1414, 0], [1414, 0], [], [])
   Call: (260) [system] var([1414, 0])
^  Redo: (259) [user] subst_vars([1414, 0], _432510, [], _417572)
^  Unify: (259) [user] subst_vars([1414, 0], [_448380|_448382], [], _417572)
^  Call: (260) [user] subst_vars(1414, _448380, [], _449320)
^  Unify: (260) [user] subst_vars(1414, 1414, [], [])
   Call: (261) [system] var(1414)
^  Redo: (260) [user] subst_vars(1414, _448380, [], _449320)
^  Unify: (260) [user] subst_vars(1414, _448380, [], _449320)
   Call: (261) [system] atom(1414)
^  Redo: (260) [user] subst_vars(1414, _448380, [], _449320)
^  Unify: (260) [user] subst_vars(1414, _448380, [], _449320)
   Call: (261) [system] compound(1414)
^  Redo: (260) [user] subst_vars(1414, _448380, [], _449320)
^  Unify: (260) [user] subst_vars(1414, 1414, [], [])
^  Exit: (260) [user] subst_vars(1414, 1414, [], [])
^  Call: (260) [user] subst_vars([0], _448382, [], _417572)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _448382, [], _417572)
^  Unify: (260) [user] subst_vars([0], [_464252|_464254], [], _417572)
^  Call: (261) [user] subst_vars(0, _464252, [], _465192)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _464252, [], _465192)
^  Unify: (261) [user] subst_vars(0, _464252, [], _465192)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _464252, [], _465192)
^  Unify: (261) [user] subst_vars(0, _464252, [], _465192)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _464252, [], _465192)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _464254, [], _417572)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _464254, [], _417572)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1414, 0], [1414, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            !(foo)", 1414, 0], [";;            !(foo)", 1414, 0], [], [])
   Call: (258) [system] compound_name_arguments(_417570, '$COMMENT', [";;            !(foo)", 1414, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT', [";;            !(foo)", 1414, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            !(foo)", 1414, 0), '$COMMENT'(";;            !(foo)", 1414, 0), [], [])
   Call: (257) [system] _487610=metta_file_buffer(+, '$COMMENT'(";;            !(foo)", 1414, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            !(foo)", 1414, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            !(foo)", 1414, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            !(foo)", 1414, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            !(foo)", 1414, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(foo)", 1414, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(foo)", 1414, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(foo)", 1414, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(foo)", 1414, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1415, 0, 50820, '$COMMENT'(";;            !(quote (foo))", 1415, 0), '$stream_position'(50820, 1415, 0, 50854)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _22486))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _22486))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _22486)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _22486)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            !(quote (foo))", 1415, 0), _22486)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            !(quote (foo))", 1415, 0), _22486)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _28098))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _28098))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _28098))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _28098))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _28098)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _28098)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _33684))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _33684))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _33684)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _33684)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            !(quote (foo))", 1415, 0), _33684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(quote (foo))", 1415, 0), _33684)
   Call: (270) [system] var('$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(quote (foo))", 1415, 0), _33684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(quote (foo))", 1415, 0), '$VAR'(_41144))
   Call: (270) [system] atom('$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(quote (foo))", 1415, 0), _33684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(quote (foo))", 1415, 0), _33684)
   Call: (270) [system] '$COMMENT'(";;            !(quote (foo))", 1415, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(quote (foo))", 1415, 0), _33684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(quote (foo))", 1415, 0), _33684)
   Call: (270) [system] '$COMMENT'(";;            !(quote (foo))", 1415, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(quote (foo))", 1415, 0), _33684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(quote (foo))", 1415, 0), _33684)
   Call: (270) [system] '$COMMENT'(";;            !(quote (foo))", 1415, 0)==[_50424, _50430]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(quote (foo))", 1415, 0), _33684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(quote (foo))", 1415, 0), _33684)
   Call: (270) [system] is_list('$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(quote (foo))", 1415, 0), _33684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(quote (foo))", 1415, 0), _33684)
   Call: (270) [system] string('$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(quote (foo))", 1415, 0), _33684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(quote (foo))", 1415, 0), _33684)
   Call: (270) [system] compound('$COMMENT'(";;            !(quote (foo))", 1415, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            !(quote (foo))", 1415, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            !(quote (foo))", 1415, 0), _60626, _60628)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT', [";;            !(quote (foo))", 1415, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            !(quote (foo))", 1415, 0], _64368)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            !(quote (foo))", 1415, 0], _64368)
   Call: (271) [apply] apply:maplist_([";;            !(quote (foo))", 1415, 0], _64368, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            !(quote (foo))", 1415, 0], [_67186|_67188], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            !(quote (foo))", _67186)
^  Unify: (272) [user] mfix_vars1(";;            !(quote (foo))", _67186)
   Call: (273) [system] var(";;            !(quote (foo))")
^  Redo: (272) [user] mfix_vars1(";;            !(quote (foo))", _67186)
^  Unify: (272) [user] mfix_vars1(";;            !(quote (foo))", '$VAR'(_71832))
   Call: (273) [system] atom(";;            !(quote (foo))")
^  Redo: (272) [user] mfix_vars1(";;            !(quote (foo))", _67186)
^  Unify: (272) [user] mfix_vars1(";;            !(quote (foo))", _67186)
   Call: (273) [system] ";;            !(quote (foo))"==true
^  Redo: (272) [user] mfix_vars1(";;            !(quote (foo))", _67186)
^  Unify: (272) [user] mfix_vars1(";;            !(quote (foo))", _67186)
   Call: (273) [system] ";;            !(quote (foo))"==false
^  Redo: (272) [user] mfix_vars1(";;            !(quote (foo))", _67186)
^  Unify: (272) [user] mfix_vars1(";;            !(quote (foo))", _67186)
   Call: (273) [system] ";;            !(quote (foo))"==[_81112, _81118]
^  Redo: (272) [user] mfix_vars1(";;            !(quote (foo))", _67186)
^  Unify: (272) [user] mfix_vars1(";;            !(quote (foo))", _67186)
   Call: (273) [system] is_list(";;            !(quote (foo))")
^  Redo: (272) [user] mfix_vars1(";;            !(quote (foo))", _67186)
^  Unify: (272) [user] mfix_vars1(";;            !(quote (foo))", _67186)
   Call: (273) [system] string(";;            !(quote (foo))")
   Exit: (273) [system] string(";;            !(quote (foo))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            !(quote (foo))", _67186)
^  Unify: (272) [user] mfix_vars1(";;            !(quote (foo))", _67186)
   Call: (273) [system] compound(";;            !(quote (foo))")
^  Redo: (272) [user] mfix_vars1(";;            !(quote (foo))", _67186)
^  Unify: (272) [user] mfix_vars1(";;            !(quote (foo))", _67186)
^  Call: (273) [user] symbol(";;            !(quote (foo))")
^  Unify: (273) [user] symbol(";;            !(quote (foo))")
   Call: (274) [system] atom(";;            !(quote (foo))")
   Fail: (274) [system] atom(";;            !(quote (foo))")
^  Fail: (273) [user] symbol(";;            !(quote (foo))")
^  Redo: (272) [user] mfix_vars1(";;            !(quote (foo))", _67186)
   Call: (273) [system] ";;            !(quote (foo))"=_67186
   Exit: (273) [system] ";;            !(quote (foo))"=";;            !(quote (foo))"
^  Exit: (272) [user] mfix_vars1(";;            !(quote (foo))", ";;            !(quote (foo))")
   Call: (272) [apply] apply:maplist_([1415, 0], _67188, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1415, 0], [_105184|_105186], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1415, _105184)
^  Unify: (273) [user] mfix_vars1(1415, _105184)
   Call: (274) [system] var(1415)
^  Redo: (273) [user] mfix_vars1(1415, _105184)
^  Unify: (273) [user] mfix_vars1(1415, '$VAR'(_109830))
   Call: (274) [system] atom(1415)
^  Redo: (273) [user] mfix_vars1(1415, _105184)
^  Unify: (273) [user] mfix_vars1(1415, _105184)
   Call: (274) [system] 1415==true
^  Redo: (273) [user] mfix_vars1(1415, _105184)
^  Unify: (273) [user] mfix_vars1(1415, _105184)
   Call: (274) [system] 1415==false
^  Redo: (273) [user] mfix_vars1(1415, _105184)
^  Unify: (273) [user] mfix_vars1(1415, _105184)
   Call: (274) [system] 1415==[_119110, _119116]
^  Redo: (273) [user] mfix_vars1(1415, _105184)
^  Unify: (273) [user] mfix_vars1(1415, _105184)
   Call: (274) [system] is_list(1415)
^  Redo: (273) [user] mfix_vars1(1415, _105184)
^  Unify: (273) [user] mfix_vars1(1415, _105184)
   Call: (274) [system] string(1415)
^  Redo: (273) [user] mfix_vars1(1415, _105184)
^  Unify: (273) [user] mfix_vars1(1415, _105184)
   Call: (274) [system] compound(1415)
^  Redo: (273) [user] mfix_vars1(1415, _105184)
^  Unify: (273) [user] mfix_vars1(1415, _105184)
^  Call: (274) [user] symbol(1415)
^  Unify: (274) [user] symbol(1415)
   Call: (275) [system] atom(1415)
   Fail: (275) [system] atom(1415)
^  Fail: (274) [user] symbol(1415)
^  Redo: (273) [user] mfix_vars1(1415, _105184)
   Call: (274) [system] 1415=_105184
   Exit: (274) [system] 1415=1415
^  Exit: (273) [user] mfix_vars1(1415, 1415)
   Call: (273) [apply] apply:maplist_([0], _105186, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_139510|_139512], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _139510)
^  Unify: (274) [user] mfix_vars1(0, _139510)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _139510)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_144156))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _139510)
^  Unify: (274) [user] mfix_vars1(0, _139510)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _139510)
^  Unify: (274) [user] mfix_vars1(0, _139510)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _139510)
^  Unify: (274) [user] mfix_vars1(0, _139510)
   Call: (275) [system] 0==[_153436, _153442]
^  Redo: (274) [user] mfix_vars1(0, _139510)
^  Unify: (274) [user] mfix_vars1(0, _139510)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _139510)
^  Unify: (274) [user] mfix_vars1(0, _139510)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _139510)
^  Unify: (274) [user] mfix_vars1(0, _139510)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _139510)
^  Unify: (274) [user] mfix_vars1(0, _139510)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _139510)
   Call: (275) [system] 0=_139510
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _139512, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1415, 0], [1415, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            !(quote (foo))", 1415, 0], [";;            !(quote (foo))", 1415, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            !(quote (foo))", 1415, 0], [";;            !(quote (foo))", 1415, 0])
   Call: (270) [system] compound_name_arguments(_33684, '$COMMENT', [";;            !(quote (foo))", 1415, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT', [";;            !(quote (foo))", 1415, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(quote (foo))", 1415, 0)\=@='$COMMENT'(";;            !(quote (foo))", 1415, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _28098)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _189684))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _189684))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _189684))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _189684))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _189684)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _189684)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _195270))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _195270))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _195270)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _195270)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            !(quote (foo))", 1415, 0), _195270)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(quote (foo))", 1415, 0)\=@='$COMMENT'(";;            !(quote (foo))", 1415, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _189684)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _22486))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _22486))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _22486))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _22486))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _22486)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _22486)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _217590))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _217590))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _217590)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _217590)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            !(quote (foo))", 1415, 0), _217590)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(quote (foo))", 1415, 0)\=@='$COMMENT'(";;            !(quote (foo))", 1415, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _22486)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0)))
   Call: (261) [system] '$COMMENT'(";;            !(quote (foo))", 1415, 0)\=@='$COMMENT'(";;            !(quote (foo))", 1415, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(quote (foo))", 1415, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            !(quote (foo))", 1415, 0), _246368, [], _246370)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            !(quote (foo))", 1415, 0), _246368, [], _246370)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(quote (foo))", 1415, 0), _246368, [], _246370)
   Call: (258) [system] atom('$COMMENT'(";;            !(quote (foo))", 1415, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            !(quote (foo))", 1415, 0), _246368, [], _246370)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(quote (foo))", 1415, 0), _246368, [], _246370)
   Call: (258) [system] compound('$COMMENT'(";;            !(quote (foo))", 1415, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            !(quote (foo))", 1415, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            !(quote (foo))", 1415, 0), _255684, _255686)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT', [";;            !(quote (foo))", 1415, 0])
^  Call: (258) [user] subst_vars([";;            !(quote (foo))", 1415, 0], _257570, [], _246370)
^  Unify: (258) [user] subst_vars([";;            !(quote (foo))", 1415, 0], [";;            !(quote (foo))", 1415, 0], [], [])
   Call: (259) [system] var([";;            !(quote (foo))", 1415, 0])
^  Redo: (258) [user] subst_vars([";;            !(quote (foo))", 1415, 0], _257570, [], _246370)
^  Unify: (258) [user] subst_vars([";;            !(quote (foo))", 1415, 0], [_261306|_261308], [], _246370)
^  Call: (259) [user] subst_vars(";;            !(quote (foo))", _261306, [], _262246)
^  Unify: (259) [user] subst_vars(";;            !(quote (foo))", ";;            !(quote (foo))", [], [])
   Call: (260) [system] var(";;            !(quote (foo))")
^  Redo: (259) [user] subst_vars(";;            !(quote (foo))", _261306, [], _262246)
^  Unify: (259) [user] subst_vars(";;            !(quote (foo))", _261306, [], _262246)
   Call: (260) [system] atom(";;            !(quote (foo))")
^  Redo: (259) [user] subst_vars(";;            !(quote (foo))", _261306, [], _262246)
^  Unify: (259) [user] subst_vars(";;            !(quote (foo))", _261306, [], _262246)
   Call: (260) [system] compound(";;            !(quote (foo))")
^  Redo: (259) [user] subst_vars(";;            !(quote (foo))", _261306, [], _262246)
^  Unify: (259) [user] subst_vars(";;            !(quote (foo))", ";;            !(quote (foo))", [], [])
^  Exit: (259) [user] subst_vars(";;            !(quote (foo))", ";;            !(quote (foo))", [], [])
^  Call: (259) [user] subst_vars([1415, 0], _261308, [], _246370)
^  Unify: (259) [user] subst_vars([1415, 0], [1415, 0], [], [])
   Call: (260) [system] var([1415, 0])
^  Redo: (259) [user] subst_vars([1415, 0], _261308, [], _246370)
^  Unify: (259) [user] subst_vars([1415, 0], [_277178|_277180], [], _246370)
^  Call: (260) [user] subst_vars(1415, _277178, [], _278118)
^  Unify: (260) [user] subst_vars(1415, 1415, [], [])
   Call: (261) [system] var(1415)
^  Redo: (260) [user] subst_vars(1415, _277178, [], _278118)
^  Unify: (260) [user] subst_vars(1415, _277178, [], _278118)
   Call: (261) [system] atom(1415)
^  Redo: (260) [user] subst_vars(1415, _277178, [], _278118)
^  Unify: (260) [user] subst_vars(1415, _277178, [], _278118)
   Call: (261) [system] compound(1415)
^  Redo: (260) [user] subst_vars(1415, _277178, [], _278118)
^  Unify: (260) [user] subst_vars(1415, 1415, [], [])
^  Exit: (260) [user] subst_vars(1415, 1415, [], [])
^  Call: (260) [user] subst_vars([0], _277180, [], _246370)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _277180, [], _246370)
^  Unify: (260) [user] subst_vars([0], [_293050|_293052], [], _246370)
^  Call: (261) [user] subst_vars(0, _293050, [], _293990)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _293050, [], _293990)
^  Unify: (261) [user] subst_vars(0, _293050, [], _293990)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _293050, [], _293990)
^  Unify: (261) [user] subst_vars(0, _293050, [], _293990)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _293050, [], _293990)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _293052, [], _246370)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _293052, [], _246370)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1415, 0], [1415, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            !(quote (foo))", 1415, 0], [";;            !(quote (foo))", 1415, 0], [], [])
   Call: (258) [system] compound_name_arguments(_246368, '$COMMENT', [";;            !(quote (foo))", 1415, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT', [";;            !(quote (foo))", 1415, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            !(quote (foo))", 1415, 0), '$COMMENT'(";;            !(quote (foo))", 1415, 0), [], [])
   Call: (257) [system] _316408=metta_file_buffer(+, '$COMMENT'(";;            !(quote (foo))", 1415, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            !(quote (foo))", 1415, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            !(quote (foo))", 1415, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            !(quote (foo))", 1415, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            !(quote (foo))", 1415, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(quote (foo))", 1415, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(quote (foo))", 1415, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(quote (foo))", 1415, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(quote (foo))", 1415, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1416, 0, 50849, '$COMMENT'(";;        \");", 1416, 0), '$stream_position'(50849, 1416, 0, 50883)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        \");", 1416, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        \");", 1416, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        \");", 1416, 0), _369126))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        \");", 1416, 0), _369126))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        \");", 1416, 0), _369126)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        \");", 1416, 0), _369126)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        \");", 1416, 0), _369126)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        \");", 1416, 0), _369126)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        \");", 1416, 0), _374738))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        \");", 1416, 0), _374738))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        \");", 1416, 0), _374738))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        \");", 1416, 0), _374738))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        \");", 1416, 0), _374738)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        \");", 1416, 0), _374738)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        \");", 1416, 0), _380324))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        \");", 1416, 0), _380324))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        \");", 1416, 0), _380324)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        \");", 1416, 0), _380324)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1416, 0), _380324)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1416, 0), _380324)
   Call: (270) [system] var('$COMMENT'(";;        \");", 1416, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1416, 0), _380324)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1416, 0), '$VAR'(_387784))
   Call: (270) [system] atom('$COMMENT'(";;        \");", 1416, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1416, 0), _380324)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1416, 0), _380324)
   Call: (270) [system] '$COMMENT'(";;        \");", 1416, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1416, 0), _380324)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1416, 0), _380324)
   Call: (270) [system] '$COMMENT'(";;        \");", 1416, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1416, 0), _380324)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1416, 0), _380324)
   Call: (270) [system] '$COMMENT'(";;        \");", 1416, 0)==[_397064, _397070]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1416, 0), _380324)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1416, 0), _380324)
   Call: (270) [system] is_list('$COMMENT'(";;        \");", 1416, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1416, 0), _380324)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1416, 0), _380324)
   Call: (270) [system] string('$COMMENT'(";;        \");", 1416, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1416, 0), _380324)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1416, 0), _380324)
   Call: (270) [system] compound('$COMMENT'(";;        \");", 1416, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        \");", 1416, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        \");", 1416, 0), _407266, _407268)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        \");", 1416, 0), '$COMMENT', [";;        \");", 1416, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        \");", 1416, 0], _411008)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        \");", 1416, 0], _411008)
   Call: (271) [apply] apply:maplist_([";;        \");", 1416, 0], _411008, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        \");", 1416, 0], [_413826|_413828], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        \");", _413826)
^  Unify: (272) [user] mfix_vars1(";;        \");", _413826)
   Call: (273) [system] var(";;        \");")
^  Redo: (272) [user] mfix_vars1(";;        \");", _413826)
^  Unify: (272) [user] mfix_vars1(";;        \");", '$VAR'(_418472))
   Call: (273) [system] atom(";;        \");")
^  Redo: (272) [user] mfix_vars1(";;        \");", _413826)
^  Unify: (272) [user] mfix_vars1(";;        \");", _413826)
   Call: (273) [system] ";;        \");"==true
^  Redo: (272) [user] mfix_vars1(";;        \");", _413826)
^  Unify: (272) [user] mfix_vars1(";;        \");", _413826)
   Call: (273) [system] ";;        \");"==false
^  Redo: (272) [user] mfix_vars1(";;        \");", _413826)
^  Unify: (272) [user] mfix_vars1(";;        \");", _413826)
   Call: (273) [system] ";;        \");"==[_427752, _427758]
^  Redo: (272) [user] mfix_vars1(";;        \");", _413826)
^  Unify: (272) [user] mfix_vars1(";;        \");", _413826)
   Call: (273) [system] is_list(";;        \");")
^  Redo: (272) [user] mfix_vars1(";;        \");", _413826)
^  Unify: (272) [user] mfix_vars1(";;        \");", _413826)
   Call: (273) [system] string(";;        \");")
   Exit: (273) [system] string(";;        \");")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        \");", _413826)
^  Unify: (272) [user] mfix_vars1(";;        \");", _413826)
   Call: (273) [system] compound(";;        \");")
^  Redo: (272) [user] mfix_vars1(";;        \");", _413826)
^  Unify: (272) [user] mfix_vars1(";;        \");", _413826)
^  Call: (273) [user] symbol(";;        \");")
^  Unify: (273) [user] symbol(";;        \");")
   Call: (274) [system] atom(";;        \");")
   Fail: (274) [system] atom(";;        \");")
^  Fail: (273) [user] symbol(";;        \");")
^  Redo: (272) [user] mfix_vars1(";;        \");", _413826)
   Call: (273) [system] ";;        \");"=_413826
   Exit: (273) [system] ";;        \");"=";;        \");"
^  Exit: (272) [user] mfix_vars1(";;        \");", ";;        \");")
   Call: (272) [apply] apply:maplist_([1416, 0], _413828, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1416, 0], [_451824|_451826], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1416, _451824)
^  Unify: (273) [user] mfix_vars1(1416, _451824)
   Call: (274) [system] var(1416)
^  Redo: (273) [user] mfix_vars1(1416, _451824)
^  Unify: (273) [user] mfix_vars1(1416, '$VAR'(_456470))
   Call: (274) [system] atom(1416)
^  Redo: (273) [user] mfix_vars1(1416, _451824)
^  Unify: (273) [user] mfix_vars1(1416, _451824)
   Call: (274) [system] 1416==true
^  Redo: (273) [user] mfix_vars1(1416, _451824)
^  Unify: (273) [user] mfix_vars1(1416, _451824)
   Call: (274) [system] 1416==false
^  Redo: (273) [user] mfix_vars1(1416, _451824)
^  Unify: (273) [user] mfix_vars1(1416, _451824)
   Call: (274) [system] 1416==[_465750, _465756]
^  Redo: (273) [user] mfix_vars1(1416, _451824)
^  Unify: (273) [user] mfix_vars1(1416, _451824)
   Call: (274) [system] is_list(1416)
^  Redo: (273) [user] mfix_vars1(1416, _451824)
^  Unify: (273) [user] mfix_vars1(1416, _451824)
   Call: (274) [system] string(1416)
^  Redo: (273) [user] mfix_vars1(1416, _451824)
^  Unify: (273) [user] mfix_vars1(1416, _451824)
   Call: (274) [system] compound(1416)
^  Redo: (273) [user] mfix_vars1(1416, _451824)
^  Unify: (273) [user] mfix_vars1(1416, _451824)
^  Call: (274) [user] symbol(1416)
^  Unify: (274) [user] symbol(1416)
   Call: (275) [system] atom(1416)
   Fail: (275) [system] atom(1416)
^  Fail: (274) [user] symbol(1416)
^  Redo: (273) [user] mfix_vars1(1416, _451824)
   Call: (274) [system] 1416=_451824
   Exit: (274) [system] 1416=1416
^  Exit: (273) [user] mfix_vars1(1416, 1416)
   Call: (273) [apply] apply:maplist_([0], _451826, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_486150|_486152], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _486150)
^  Unify: (274) [user] mfix_vars1(0, _486150)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _486150)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_490796))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _486150)
^  Unify: (274) [user] mfix_vars1(0, _486150)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _486150)
^  Unify: (274) [user] mfix_vars1(0, _486150)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _486150)
^  Unify: (274) [user] mfix_vars1(0, _486150)
   Call: (275) [system] 0==[_500076, _500082]
^  Redo: (274) [user] mfix_vars1(0, _486150)
^  Unify: (274) [user] mfix_vars1(0, _486150)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _486150)
^  Unify: (274) [user] mfix_vars1(0, _486150)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _486150)
^  Unify: (274) [user] mfix_vars1(0, _486150)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _486150)
^  Unify: (274) [user] mfix_vars1(0, _486150)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _486150)
   Call: (275) [system] 0=_486150
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _486152, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1416, 0], [1416, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        \");", 1416, 0], [";;        \");", 1416, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        \");", 1416, 0], [";;        \");", 1416, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";;        \");", 1416, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        \");", 1416, 0), '$COMMENT', [";;        \");", 1416, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0)))
   Call: (267) [system] '$COMMENT'(";;        \");", 1416, 0)\=@='$COMMENT'(";;        \");", 1416, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        \");", 1416, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        \");", 1416, 0), _18522))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        \");", 1416, 0), _18522))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        \");", 1416, 0), _18522))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        \");", 1416, 0), _18522))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        \");", 1416, 0), _18522)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        \");", 1416, 0), _18522)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        \");", 1416, 0), _24108))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        \");", 1416, 0), _24108))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        \");", 1416, 0), _24108)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        \");", 1416, 0), _24108)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        \");", 1416, 0), _24108)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0)))
   Call: (267) [system] '$COMMENT'(";;        \");", 1416, 0)\=@='$COMMENT'(";;        \");", 1416, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        \");", 1416, 0), _18522)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        \");", 1416, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        \");", 1416, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        \");", 1416, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        \");", 1416, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        \");", 1416, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        \");", 1416, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        \");", 1416, 0), _46428))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        \");", 1416, 0), _46428))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        \");", 1416, 0), _46428)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        \");", 1416, 0), _46428)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        \");", 1416, 0), _46428)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0)))
   Call: (267) [system] '$COMMENT'(";;        \");", 1416, 0)\=@='$COMMENT'(";;        \");", 1416, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        \");", 1416, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0)))
   Call: (261) [system] '$COMMENT'(";;        \");", 1416, 0)\=@='$COMMENT'(";;        \");", 1416, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        \");", 1416, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        \");", 1416, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        \");", 1416, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        \");", 1416, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        \");", 1416, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        \");", 1416, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        \");", 1416, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        \");", 1416, 0), _75206, [], _75208)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        \");", 1416, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        \");", 1416, 0), _75206, [], _75208)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        \");", 1416, 0), _75206, [], _75208)
   Call: (258) [system] atom('$COMMENT'(";;        \");", 1416, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        \");", 1416, 0), _75206, [], _75208)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        \");", 1416, 0), _75206, [], _75208)
   Call: (258) [system] compound('$COMMENT'(";;        \");", 1416, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        \");", 1416, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        \");", 1416, 0), _84522, _84524)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        \");", 1416, 0), '$COMMENT', [";;        \");", 1416, 0])
^  Call: (258) [user] subst_vars([";;        \");", 1416, 0], _86408, [], _75208)
^  Unify: (258) [user] subst_vars([";;        \");", 1416, 0], [";;        \");", 1416, 0], [], [])
   Call: (259) [system] var([";;        \");", 1416, 0])
^  Redo: (258) [user] subst_vars([";;        \");", 1416, 0], _86408, [], _75208)
^  Unify: (258) [user] subst_vars([";;        \");", 1416, 0], [_90144|_90146], [], _75208)
^  Call: (259) [user] subst_vars(";;        \");", _90144, [], _91084)
^  Unify: (259) [user] subst_vars(";;        \");", ";;        \");", [], [])
   Call: (260) [system] var(";;        \");")
^  Redo: (259) [user] subst_vars(";;        \");", _90144, [], _91084)
^  Unify: (259) [user] subst_vars(";;        \");", _90144, [], _91084)
   Call: (260) [system] atom(";;        \");")
^  Redo: (259) [user] subst_vars(";;        \");", _90144, [], _91084)
^  Unify: (259) [user] subst_vars(";;        \");", _90144, [], _91084)
   Call: (260) [system] compound(";;        \");")
^  Redo: (259) [user] subst_vars(";;        \");", _90144, [], _91084)
^  Unify: (259) [user] subst_vars(";;        \");", ";;        \");", [], [])
^  Exit: (259) [user] subst_vars(";;        \");", ";;        \");", [], [])
^  Call: (259) [user] subst_vars([1416, 0], _90146, [], _75208)
^  Unify: (259) [user] subst_vars([1416, 0], [1416, 0], [], [])
   Call: (260) [system] var([1416, 0])
^  Redo: (259) [user] subst_vars([1416, 0], _90146, [], _75208)
^  Unify: (259) [user] subst_vars([1416, 0], [_106016|_106018], [], _75208)
^  Call: (260) [user] subst_vars(1416, _106016, [], _106956)
^  Unify: (260) [user] subst_vars(1416, 1416, [], [])
   Call: (261) [system] var(1416)
^  Redo: (260) [user] subst_vars(1416, _106016, [], _106956)
^  Unify: (260) [user] subst_vars(1416, _106016, [], _106956)
   Call: (261) [system] atom(1416)
^  Redo: (260) [user] subst_vars(1416, _106016, [], _106956)
^  Unify: (260) [user] subst_vars(1416, _106016, [], _106956)
   Call: (261) [system] compound(1416)
^  Redo: (260) [user] subst_vars(1416, _106016, [], _106956)
^  Unify: (260) [user] subst_vars(1416, 1416, [], [])
^  Exit: (260) [user] subst_vars(1416, 1416, [], [])
^  Call: (260) [user] subst_vars([0], _106018, [], _75208)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _106018, [], _75208)
^  Unify: (260) [user] subst_vars([0], [_121888|_121890], [], _75208)
^  Call: (261) [user] subst_vars(0, _121888, [], _122828)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _121888, [], _122828)
^  Unify: (261) [user] subst_vars(0, _121888, [], _122828)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _121888, [], _122828)
^  Unify: (261) [user] subst_vars(0, _121888, [], _122828)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _121888, [], _122828)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _121890, [], _75208)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _121890, [], _75208)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1416, 0], [1416, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        \");", 1416, 0], [";;        \");", 1416, 0], [], [])
   Call: (258) [system] compound_name_arguments(_75206, '$COMMENT', [";;        \");", 1416, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        \");", 1416, 0), '$COMMENT', [";;        \");", 1416, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        \");", 1416, 0), '$COMMENT'(";;        \");", 1416, 0), [], [])
   Call: (257) [system] _145246=metta_file_buffer(+, '$COMMENT'(";;        \");", 1416, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        \");", 1416, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        \");", 1416, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        \");", 1416, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        \");", 1416, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        \");", 1416, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        \");", 1416, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        \");", 1416, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        \");", 1416, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1417, 0, 50863, '$COMMENT'(";;", 1417, 0), '$stream_position'(50863, 1417, 0, 50897)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1417, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1417, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1417, 0), _197962))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1417, 0), _197962))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1417, 0), _197962)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1417, 0), _197962)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1417, 0), _197962)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1417, 0), _197962)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1417, 0), _203574))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1417, 0), _203574))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1417, 0), _203574))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1417, 0), _203574))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1417, 0), _203574)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1417, 0), _203574)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1417, 0), _209160))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1417, 0), _209160))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1417, 0), _209160)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1417, 0), _209160)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1417, 0), _209160)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1417, 0), _209160)
   Call: (270) [system] var('$COMMENT'(";;", 1417, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1417, 0), _209160)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1417, 0), '$VAR'(_216620))
   Call: (270) [system] atom('$COMMENT'(";;", 1417, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1417, 0), _209160)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1417, 0), _209160)
   Call: (270) [system] '$COMMENT'(";;", 1417, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1417, 0), _209160)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1417, 0), _209160)
   Call: (270) [system] '$COMMENT'(";;", 1417, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1417, 0), _209160)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1417, 0), _209160)
   Call: (270) [system] '$COMMENT'(";;", 1417, 0)==[_225900, _225906]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1417, 0), _209160)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1417, 0), _209160)
   Call: (270) [system] is_list('$COMMENT'(";;", 1417, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1417, 0), _209160)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1417, 0), _209160)
   Call: (270) [system] string('$COMMENT'(";;", 1417, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1417, 0), _209160)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1417, 0), _209160)
   Call: (270) [system] compound('$COMMENT'(";;", 1417, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1417, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1417, 0), _236102, _236104)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1417, 0), '$COMMENT', [";;", 1417, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1417, 0], _239844)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1417, 0], _239844)
   Call: (271) [apply] apply:maplist_([";;", 1417, 0], _239844, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1417, 0], [_242662|_242664], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _242662)
^  Unify: (272) [user] mfix_vars1(";;", _242662)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _242662)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_247308))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _242662)
^  Unify: (272) [user] mfix_vars1(";;", _242662)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _242662)
^  Unify: (272) [user] mfix_vars1(";;", _242662)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _242662)
^  Unify: (272) [user] mfix_vars1(";;", _242662)
   Call: (273) [system] ";;"==[_256588, _256594]
^  Redo: (272) [user] mfix_vars1(";;", _242662)
^  Unify: (272) [user] mfix_vars1(";;", _242662)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _242662)
^  Unify: (272) [user] mfix_vars1(";;", _242662)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _242662)
^  Unify: (272) [user] mfix_vars1(";;", _242662)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _242662)
^  Unify: (272) [user] mfix_vars1(";;", _242662)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _242662)
   Call: (273) [system] ";;"=_242662
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1417, 0], _242664, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1417, 0], [_280660|_280662], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1417, _280660)
^  Unify: (273) [user] mfix_vars1(1417, _280660)
   Call: (274) [system] var(1417)
^  Redo: (273) [user] mfix_vars1(1417, _280660)
^  Unify: (273) [user] mfix_vars1(1417, '$VAR'(_285306))
   Call: (274) [system] atom(1417)
^  Redo: (273) [user] mfix_vars1(1417, _280660)
^  Unify: (273) [user] mfix_vars1(1417, _280660)
   Call: (274) [system] 1417==true
^  Redo: (273) [user] mfix_vars1(1417, _280660)
^  Unify: (273) [user] mfix_vars1(1417, _280660)
   Call: (274) [system] 1417==false
^  Redo: (273) [user] mfix_vars1(1417, _280660)
^  Unify: (273) [user] mfix_vars1(1417, _280660)
   Call: (274) [system] 1417==[_294586, _294592]
^  Redo: (273) [user] mfix_vars1(1417, _280660)
^  Unify: (273) [user] mfix_vars1(1417, _280660)
   Call: (274) [system] is_list(1417)
^  Redo: (273) [user] mfix_vars1(1417, _280660)
^  Unify: (273) [user] mfix_vars1(1417, _280660)
   Call: (274) [system] string(1417)
^  Redo: (273) [user] mfix_vars1(1417, _280660)
^  Unify: (273) [user] mfix_vars1(1417, _280660)
   Call: (274) [system] compound(1417)
^  Redo: (273) [user] mfix_vars1(1417, _280660)
^  Unify: (273) [user] mfix_vars1(1417, _280660)
^  Call: (274) [user] symbol(1417)
^  Unify: (274) [user] symbol(1417)
   Call: (275) [system] atom(1417)
   Fail: (275) [system] atom(1417)
^  Fail: (274) [user] symbol(1417)
^  Redo: (273) [user] mfix_vars1(1417, _280660)
   Call: (274) [system] 1417=_280660
   Exit: (274) [system] 1417=1417
^  Exit: (273) [user] mfix_vars1(1417, 1417)
   Call: (273) [apply] apply:maplist_([0], _280662, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_314986|_314988], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _314986)
^  Unify: (274) [user] mfix_vars1(0, _314986)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _314986)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_319632))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _314986)
^  Unify: (274) [user] mfix_vars1(0, _314986)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _314986)
^  Unify: (274) [user] mfix_vars1(0, _314986)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _314986)
^  Unify: (274) [user] mfix_vars1(0, _314986)
   Call: (275) [system] 0==[_328912, _328918]
^  Redo: (274) [user] mfix_vars1(0, _314986)
^  Unify: (274) [user] mfix_vars1(0, _314986)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _314986)
^  Unify: (274) [user] mfix_vars1(0, _314986)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _314986)
^  Unify: (274) [user] mfix_vars1(0, _314986)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _314986)
^  Unify: (274) [user] mfix_vars1(0, _314986)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _314986)
   Call: (275) [system] 0=_314986
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _314988, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1417, 0], [1417, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1417, 0], [";;", 1417, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1417, 0], [";;", 1417, 0])
   Call: (270) [system] compound_name_arguments(_209160, '$COMMENT', [";;", 1417, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1417, 0), '$COMMENT', [";;", 1417, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1417, 0)\=@='$COMMENT'(";;", 1417, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1417, 0), _203574)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1417, 0), _365160))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1417, 0), _365160))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1417, 0), _365160))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1417, 0), _365160))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1417, 0), _365160)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1417, 0), _365160)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1417, 0), _370746))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1417, 0), _370746))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1417, 0), _370746)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1417, 0), _370746)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1417, 0), _370746)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1417, 0)\=@='$COMMENT'(";;", 1417, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1417, 0), _365160)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1417, 0), _197962))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1417, 0), _197962))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1417, 0), _197962))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1417, 0), _197962))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1417, 0), _197962)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1417, 0), _197962)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1417, 0), _393066))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1417, 0), _393066))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1417, 0), _393066)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1417, 0), _393066)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1417, 0), _393066)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1417, 0)\=@='$COMMENT'(";;", 1417, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1417, 0), _197962)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1417, 0)\=@='$COMMENT'(";;", 1417, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1417, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1417, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1417, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1417, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1417, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1417, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1417, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1417, 0), _421844, [], _421846)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1417, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1417, 0), _421844, [], _421846)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1417, 0), _421844, [], _421846)
   Call: (258) [system] atom('$COMMENT'(";;", 1417, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1417, 0), _421844, [], _421846)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1417, 0), _421844, [], _421846)
   Call: (258) [system] compound('$COMMENT'(";;", 1417, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1417, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1417, 0), _431160, _431162)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1417, 0), '$COMMENT', [";;", 1417, 0])
^  Call: (258) [user] subst_vars([";;", 1417, 0], _433046, [], _421846)
^  Unify: (258) [user] subst_vars([";;", 1417, 0], [";;", 1417, 0], [], [])
   Call: (259) [system] var([";;", 1417, 0])
^  Redo: (258) [user] subst_vars([";;", 1417, 0], _433046, [], _421846)
^  Unify: (258) [user] subst_vars([";;", 1417, 0], [_436782|_436784], [], _421846)
^  Call: (259) [user] subst_vars(";;", _436782, [], _437722)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _436782, [], _437722)
^  Unify: (259) [user] subst_vars(";;", _436782, [], _437722)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _436782, [], _437722)
^  Unify: (259) [user] subst_vars(";;", _436782, [], _437722)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _436782, [], _437722)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1417, 0], _436784, [], _421846)
^  Unify: (259) [user] subst_vars([1417, 0], [1417, 0], [], [])
   Call: (260) [system] var([1417, 0])
^  Redo: (259) [user] subst_vars([1417, 0], _436784, [], _421846)
^  Unify: (259) [user] subst_vars([1417, 0], [_452654|_452656], [], _421846)
^  Call: (260) [user] subst_vars(1417, _452654, [], _453594)
^  Unify: (260) [user] subst_vars(1417, 1417, [], [])
   Call: (261) [system] var(1417)
^  Redo: (260) [user] subst_vars(1417, _452654, [], _453594)
^  Unify: (260) [user] subst_vars(1417, _452654, [], _453594)
   Call: (261) [system] atom(1417)
^  Redo: (260) [user] subst_vars(1417, _452654, [], _453594)
^  Unify: (260) [user] subst_vars(1417, _452654, [], _453594)
   Call: (261) [system] compound(1417)
^  Redo: (260) [user] subst_vars(1417, _452654, [], _453594)
^  Unify: (260) [user] subst_vars(1417, 1417, [], [])
^  Exit: (260) [user] subst_vars(1417, 1417, [], [])
^  Call: (260) [user] subst_vars([0], _452656, [], _421846)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _452656, [], _421846)
^  Unify: (260) [user] subst_vars([0], [_468526|_468528], [], _421846)
^  Call: (261) [user] subst_vars(0, _468526, [], _469466)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _468526, [], _469466)
^  Unify: (261) [user] subst_vars(0, _468526, [], _469466)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _468526, [], _469466)
^  Unify: (261) [user] subst_vars(0, _468526, [], _469466)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _468526, [], _469466)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _468528, [], _421846)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _468528, [], _421846)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1417, 0], [1417, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1417, 0], [";;", 1417, 0], [], [])
   Call: (258) [system] compound_name_arguments(_421844, '$COMMENT', [";;", 1417, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1417, 0), '$COMMENT', [";;", 1417, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1417, 0), '$COMMENT'(";;", 1417, 0), [], [])
   Call: (257) [system] _491884=metta_file_buffer(+, '$COMMENT'(";;", 1417, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1417, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1417, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1417, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1417, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1417, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1417, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1417, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1417, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1418, 0, 50866, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$stream_position'(50866, 1418, 0, 50900)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _27014))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _27014))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _27014)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _27014)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _27014)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _27014)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _32626))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _32626))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _32626))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _32626))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _32626)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _32626)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _38212))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _38212))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _38212)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _38212)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _38212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _38212)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _38212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$VAR'(_45672))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _38212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _38212)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _38212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _38212)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _38212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _38212)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0)==[_54952, _54958]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _38212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _38212)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _38212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _38212)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _38212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _38212)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _65154, _65156)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT', [";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0], _68896)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0], _68896)
   Call: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0], _68896, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0], [_71714|_71716], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _71714)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _71714)
   Call: (273) [system] var(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _71714)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", '$VAR'(_76360))
   Call: (273) [system] atom(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _71714)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _71714)
   Call: (273) [system] ";;        assert_eq_metta_results!(metta.run(parser),"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _71714)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _71714)
   Call: (273) [system] ";;        assert_eq_metta_results!(metta.run(parser),"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _71714)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _71714)
   Call: (273) [system] ";;        assert_eq_metta_results!(metta.run(parser),"==[_85640, _85646]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _71714)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _71714)
   Call: (273) [system] is_list(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _71714)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _71714)
   Call: (273) [system] string(";;        assert_eq_metta_results!(metta.run(parser),")
   Exit: (273) [system] string(";;        assert_eq_metta_results!(metta.run(parser),")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _71714)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _71714)
   Call: (273) [system] compound(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _71714)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _71714)
^  Call: (273) [user] symbol(";;        assert_eq_metta_results!(metta.run(parser),")
^  Unify: (273) [user] symbol(";;        assert_eq_metta_results!(metta.run(parser),")
   Call: (274) [system] atom(";;        assert_eq_metta_results!(metta.run(parser),")
   Fail: (274) [system] atom(";;        assert_eq_metta_results!(metta.run(parser),")
^  Fail: (273) [user] symbol(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _71714)
   Call: (273) [system] ";;        assert_eq_metta_results!(metta.run(parser),"=_71714
   Exit: (273) [system] ";;        assert_eq_metta_results!(metta.run(parser),"=";;        assert_eq_metta_results!(metta.run(parser),"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", ";;        assert_eq_metta_results!(metta.run(parser),")
   Call: (272) [apply] apply:maplist_([1418, 0], _71716, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1418, 0], [_109712|_109714], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1418, _109712)
^  Unify: (273) [user] mfix_vars1(1418, _109712)
   Call: (274) [system] var(1418)
^  Redo: (273) [user] mfix_vars1(1418, _109712)
^  Unify: (273) [user] mfix_vars1(1418, '$VAR'(_114358))
   Call: (274) [system] atom(1418)
^  Redo: (273) [user] mfix_vars1(1418, _109712)
^  Unify: (273) [user] mfix_vars1(1418, _109712)
   Call: (274) [system] 1418==true
^  Redo: (273) [user] mfix_vars1(1418, _109712)
^  Unify: (273) [user] mfix_vars1(1418, _109712)
   Call: (274) [system] 1418==false
^  Redo: (273) [user] mfix_vars1(1418, _109712)
^  Unify: (273) [user] mfix_vars1(1418, _109712)
   Call: (274) [system] 1418==[_123638, _123644]
^  Redo: (273) [user] mfix_vars1(1418, _109712)
^  Unify: (273) [user] mfix_vars1(1418, _109712)
   Call: (274) [system] is_list(1418)
^  Redo: (273) [user] mfix_vars1(1418, _109712)
^  Unify: (273) [user] mfix_vars1(1418, _109712)
   Call: (274) [system] string(1418)
^  Redo: (273) [user] mfix_vars1(1418, _109712)
^  Unify: (273) [user] mfix_vars1(1418, _109712)
   Call: (274) [system] compound(1418)
^  Redo: (273) [user] mfix_vars1(1418, _109712)
^  Unify: (273) [user] mfix_vars1(1418, _109712)
^  Call: (274) [user] symbol(1418)
^  Unify: (274) [user] symbol(1418)
   Call: (275) [system] atom(1418)
   Fail: (275) [system] atom(1418)
^  Fail: (274) [user] symbol(1418)
^  Redo: (273) [user] mfix_vars1(1418, _109712)
   Call: (274) [system] 1418=_109712
   Exit: (274) [system] 1418=1418
^  Exit: (273) [user] mfix_vars1(1418, 1418)
   Call: (273) [apply] apply:maplist_([0], _109714, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_144038|_144040], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _144038)
^  Unify: (274) [user] mfix_vars1(0, _144038)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _144038)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_148684))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _144038)
^  Unify: (274) [user] mfix_vars1(0, _144038)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _144038)
^  Unify: (274) [user] mfix_vars1(0, _144038)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _144038)
^  Unify: (274) [user] mfix_vars1(0, _144038)
   Call: (275) [system] 0==[_157964, _157970]
^  Redo: (274) [user] mfix_vars1(0, _144038)
^  Unify: (274) [user] mfix_vars1(0, _144038)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _144038)
^  Unify: (274) [user] mfix_vars1(0, _144038)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _144038)
^  Unify: (274) [user] mfix_vars1(0, _144038)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _144038)
^  Unify: (274) [user] mfix_vars1(0, _144038)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _144038)
   Call: (275) [system] 0=_144038
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _144040, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1418, 0], [1418, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0], [";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0], [";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0])
   Call: (270) [system] compound_name_arguments(_38212, '$COMMENT', [";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT', [";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _32626)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _194212))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _194212))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _194212))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _194212))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _194212)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _194212)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _199798))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _199798))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _199798)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _199798)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _199798)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _194212)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _27014))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _27014))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _27014))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _27014))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _27014)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _27014)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _222118))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _222118))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _222118)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _222118)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _222118)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _27014)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _250896, [], _250898)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _250896, [], _250898)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _250896, [], _250898)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _250896, [], _250898)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _250896, [], _250898)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), _260212, _260214)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT', [";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0], _262098, [], _250898)
^  Unify: (258) [user] subst_vars([";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0], [";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0], [], [])
   Call: (259) [system] var([";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0], _262098, [], _250898)
^  Unify: (258) [user] subst_vars([";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0], [_265834|_265836], [], _250898)
^  Call: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", _265834, [], _266774)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", ";;        assert_eq_metta_results!(metta.run(parser),", [], [])
   Call: (260) [system] var(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", _265834, [], _266774)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", _265834, [], _266774)
   Call: (260) [system] atom(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", _265834, [], _266774)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", _265834, [], _266774)
   Call: (260) [system] compound(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", _265834, [], _266774)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", ";;        assert_eq_metta_results!(metta.run(parser),", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", ";;        assert_eq_metta_results!(metta.run(parser),", [], [])
^  Call: (259) [user] subst_vars([1418, 0], _265836, [], _250898)
^  Unify: (259) [user] subst_vars([1418, 0], [1418, 0], [], [])
   Call: (260) [system] var([1418, 0])
^  Redo: (259) [user] subst_vars([1418, 0], _265836, [], _250898)
^  Unify: (259) [user] subst_vars([1418, 0], [_281706|_281708], [], _250898)
^  Call: (260) [user] subst_vars(1418, _281706, [], _282646)
^  Unify: (260) [user] subst_vars(1418, 1418, [], [])
   Call: (261) [system] var(1418)
^  Redo: (260) [user] subst_vars(1418, _281706, [], _282646)
^  Unify: (260) [user] subst_vars(1418, _281706, [], _282646)
   Call: (261) [system] atom(1418)
^  Redo: (260) [user] subst_vars(1418, _281706, [], _282646)
^  Unify: (260) [user] subst_vars(1418, _281706, [], _282646)
   Call: (261) [system] compound(1418)
^  Redo: (260) [user] subst_vars(1418, _281706, [], _282646)
^  Unify: (260) [user] subst_vars(1418, 1418, [], [])
^  Exit: (260) [user] subst_vars(1418, 1418, [], [])
^  Call: (260) [user] subst_vars([0], _281708, [], _250898)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _281708, [], _250898)
^  Unify: (260) [user] subst_vars([0], [_297578|_297580], [], _250898)
^  Call: (261) [user] subst_vars(0, _297578, [], _298518)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _297578, [], _298518)
^  Unify: (261) [user] subst_vars(0, _297578, [], _298518)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _297578, [], _298518)
^  Unify: (261) [user] subst_vars(0, _297578, [], _298518)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _297578, [], _298518)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _297580, [], _250898)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _297580, [], _250898)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1418, 0], [1418, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0], [";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0], [], [])
   Call: (258) [system] compound_name_arguments(_250896, '$COMMENT', [";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT', [";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), [], [])
   Call: (257) [system] _320936=metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1418, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1419, 0, 50920, '$COMMENT'(";;            Ok(vec![", 1419, 0), '$stream_position'(50920, 1419, 0, 50954)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![", 1419, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![", 1419, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![", 1419, 0), _373656))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![", 1419, 0), _373656))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![", 1419, 0), _373656)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            Ok(vec![", 1419, 0), _373656)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![", 1419, 0), _373656)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![", 1419, 0), _373656)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1419, 0), _379268))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1419, 0), _379268))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1419, 0), _379268))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1419, 0), _379268))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1419, 0), _379268)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1419, 0), _379268)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1419, 0), _384854))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1419, 0), _384854))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1419, 0), _384854)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1419, 0), _384854)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1419, 0), _384854)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1419, 0), _384854)
   Call: (270) [system] var('$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1419, 0), _384854)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1419, 0), '$VAR'(_392314))
   Call: (270) [system] atom('$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1419, 0), _384854)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1419, 0), _384854)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![", 1419, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1419, 0), _384854)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1419, 0), _384854)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![", 1419, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1419, 0), _384854)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1419, 0), _384854)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![", 1419, 0)==[_401594, _401600]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1419, 0), _384854)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1419, 0), _384854)
   Call: (270) [system] is_list('$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1419, 0), _384854)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1419, 0), _384854)
   Call: (270) [system] string('$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1419, 0), _384854)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1419, 0), _384854)
   Call: (270) [system] compound('$COMMENT'(";;            Ok(vec![", 1419, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            Ok(vec![", 1419, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![", 1419, 0), _411796, _411798)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT', [";;            Ok(vec![", 1419, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            Ok(vec![", 1419, 0], _415538)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            Ok(vec![", 1419, 0], _415538)
   Call: (271) [apply] apply:maplist_([";;            Ok(vec![", 1419, 0], _415538, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            Ok(vec![", 1419, 0], [_418356|_418358], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            Ok(vec![", _418356)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![", _418356)
   Call: (273) [system] var(";;            Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![", _418356)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![", '$VAR'(_423002))
   Call: (273) [system] atom(";;            Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![", _418356)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![", _418356)
   Call: (273) [system] ";;            Ok(vec!["==true
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![", _418356)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![", _418356)
   Call: (273) [system] ";;            Ok(vec!["==false
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![", _418356)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![", _418356)
   Call: (273) [system] ";;            Ok(vec!["==[_432282, _432288]
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![", _418356)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![", _418356)
   Call: (273) [system] is_list(";;            Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![", _418356)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![", _418356)
   Call: (273) [system] string(";;            Ok(vec![")
   Exit: (273) [system] string(";;            Ok(vec![")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![", _418356)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![", _418356)
   Call: (273) [system] compound(";;            Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![", _418356)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![", _418356)
^  Call: (273) [user] symbol(";;            Ok(vec![")
^  Unify: (273) [user] symbol(";;            Ok(vec![")
   Call: (274) [system] atom(";;            Ok(vec![")
   Fail: (274) [system] atom(";;            Ok(vec![")
^  Fail: (273) [user] symbol(";;            Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![", _418356)
   Call: (273) [system] ";;            Ok(vec!["=_418356
   Exit: (273) [system] ";;            Ok(vec!["=";;            Ok(vec!["
^  Exit: (272) [user] mfix_vars1(";;            Ok(vec![", ";;            Ok(vec![")
   Call: (272) [apply] apply:maplist_([1419, 0], _418358, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1419, 0], [_456354|_456356], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1419, _456354)
^  Unify: (273) [user] mfix_vars1(1419, _456354)
   Call: (274) [system] var(1419)
^  Redo: (273) [user] mfix_vars1(1419, _456354)
^  Unify: (273) [user] mfix_vars1(1419, '$VAR'(_461000))
   Call: (274) [system] atom(1419)
^  Redo: (273) [user] mfix_vars1(1419, _456354)
^  Unify: (273) [user] mfix_vars1(1419, _456354)
   Call: (274) [system] 1419==true
^  Redo: (273) [user] mfix_vars1(1419, _456354)
^  Unify: (273) [user] mfix_vars1(1419, _456354)
   Call: (274) [system] 1419==false
^  Redo: (273) [user] mfix_vars1(1419, _456354)
^  Unify: (273) [user] mfix_vars1(1419, _456354)
   Call: (274) [system] 1419==[_470280, _470286]
^  Redo: (273) [user] mfix_vars1(1419, _456354)
^  Unify: (273) [user] mfix_vars1(1419, _456354)
   Call: (274) [system] is_list(1419)
^  Redo: (273) [user] mfix_vars1(1419, _456354)
^  Unify: (273) [user] mfix_vars1(1419, _456354)
   Call: (274) [system] string(1419)
^  Redo: (273) [user] mfix_vars1(1419, _456354)
^  Unify: (273) [user] mfix_vars1(1419, _456354)
   Call: (274) [system] compound(1419)
^  Redo: (273) [user] mfix_vars1(1419, _456354)
^  Unify: (273) [user] mfix_vars1(1419, _456354)
^  Call: (274) [user] symbol(1419)
^  Unify: (274) [user] symbol(1419)
   Call: (275) [system] atom(1419)
   Fail: (275) [system] atom(1419)
^  Fail: (274) [user] symbol(1419)
^  Redo: (273) [user] mfix_vars1(1419, _456354)
   Call: (274) [system] 1419=_456354
   Exit: (274) [system] 1419=1419
^  Exit: (273) [user] mfix_vars1(1419, 1419)
   Call: (273) [apply] apply:maplist_([0], _456356, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_490680|_490682], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _490680)
^  Unify: (274) [user] mfix_vars1(0, _490680)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _490680)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_495326))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _490680)
^  Unify: (274) [user] mfix_vars1(0, _490680)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _490680)
^  Unify: (274) [user] mfix_vars1(0, _490680)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _490680)
^  Unify: (274) [user] mfix_vars1(0, _490680)
   Call: (275) [system] 0==[_504606, _504612]
^  Redo: (274) [user] mfix_vars1(0, _490680)
^  Unify: (274) [user] mfix_vars1(0, _490680)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _490680)
^  Unify: (274) [user] mfix_vars1(0, _490680)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _490680)
^  Unify: (274) [user] mfix_vars1(0, _490680)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _490680)
^  Unify: (274) [user] mfix_vars1(0, _490680)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _490680)
   Call: (275) [system] 0=_490680
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6040, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1419, 0], [1419, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            Ok(vec![", 1419, 0], [";;            Ok(vec![", 1419, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            Ok(vec![", 1419, 0], [";;            Ok(vec![", 1419, 0])
   Call: (270) [system] compound_name_arguments(_5980, '$COMMENT', [";;            Ok(vec![", 1419, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT', [";;            Ok(vec![", 1419, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![", 1419, 0)\=@='$COMMENT'(";;            Ok(vec![", 1419, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1419, 0), _5966)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1419, 0), _22786))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1419, 0), _22786))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1419, 0), _22786))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1419, 0), _22786))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1419, 0), _22786)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1419, 0), _22786)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1419, 0), _28372))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1419, 0), _28372))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1419, 0), _28372)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            Ok(vec![", 1419, 0), _28372)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![", 1419, 0), _28372)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![", 1419, 0)\=@='$COMMENT'(";;            Ok(vec![", 1419, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1419, 0), _22786)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1419, 0), _5946))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1419, 0), _5946))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1419, 0), _5946))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1419, 0), _5946))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1419, 0), _5946)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1419, 0), _5946)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1419, 0), _50692))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1419, 0), _50692))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1419, 0), _50692)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            Ok(vec![", 1419, 0), _50692)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![", 1419, 0), _50692)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![", 1419, 0)\=@='$COMMENT'(";;            Ok(vec![", 1419, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1419, 0), _5946)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0)))
   Call: (261) [system] '$COMMENT'(";;            Ok(vec![", 1419, 0)\=@='$COMMENT'(";;            Ok(vec![", 1419, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![", 1419, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![", 1419, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![", 1419, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![", 1419, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![", 1419, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![", 1419, 0), _79470, [], _79472)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![", 1419, 0), _79470, [], _79472)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![", 1419, 0), _79470, [], _79472)
   Call: (258) [system] atom('$COMMENT'(";;            Ok(vec![", 1419, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![", 1419, 0), _79470, [], _79472)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![", 1419, 0), _79470, [], _79472)
   Call: (258) [system] compound('$COMMENT'(";;            Ok(vec![", 1419, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            Ok(vec![", 1419, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![", 1419, 0), _88786, _88788)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT', [";;            Ok(vec![", 1419, 0])
^  Call: (258) [user] subst_vars([";;            Ok(vec![", 1419, 0], _90672, [], _79472)
^  Unify: (258) [user] subst_vars([";;            Ok(vec![", 1419, 0], [";;            Ok(vec![", 1419, 0], [], [])
   Call: (259) [system] var([";;            Ok(vec![", 1419, 0])
^  Redo: (258) [user] subst_vars([";;            Ok(vec![", 1419, 0], _90672, [], _79472)
^  Unify: (258) [user] subst_vars([";;            Ok(vec![", 1419, 0], [_94408|_94410], [], _79472)
^  Call: (259) [user] subst_vars(";;            Ok(vec![", _94408, [], _95348)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![", ";;            Ok(vec![", [], [])
   Call: (260) [system] var(";;            Ok(vec![")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![", _94408, [], _95348)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![", _94408, [], _95348)
   Call: (260) [system] atom(";;            Ok(vec![")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![", _94408, [], _95348)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![", _94408, [], _95348)
   Call: (260) [system] compound(";;            Ok(vec![")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![", _94408, [], _95348)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![", ";;            Ok(vec![", [], [])
^  Exit: (259) [user] subst_vars(";;            Ok(vec![", ";;            Ok(vec![", [], [])
^  Call: (259) [user] subst_vars([1419, 0], _94410, [], _79472)
^  Unify: (259) [user] subst_vars([1419, 0], [1419, 0], [], [])
   Call: (260) [system] var([1419, 0])
^  Redo: (259) [user] subst_vars([1419, 0], _94410, [], _79472)
^  Unify: (259) [user] subst_vars([1419, 0], [_110280|_110282], [], _79472)
^  Call: (260) [user] subst_vars(1419, _110280, [], _111220)
^  Unify: (260) [user] subst_vars(1419, 1419, [], [])
   Call: (261) [system] var(1419)
^  Redo: (260) [user] subst_vars(1419, _110280, [], _111220)
^  Unify: (260) [user] subst_vars(1419, _110280, [], _111220)
   Call: (261) [system] atom(1419)
^  Redo: (260) [user] subst_vars(1419, _110280, [], _111220)
^  Unify: (260) [user] subst_vars(1419, _110280, [], _111220)
   Call: (261) [system] compound(1419)
^  Redo: (260) [user] subst_vars(1419, _110280, [], _111220)
^  Unify: (260) [user] subst_vars(1419, 1419, [], [])
^  Exit: (260) [user] subst_vars(1419, 1419, [], [])
^  Call: (260) [user] subst_vars([0], _110282, [], _79472)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _110282, [], _79472)
^  Unify: (260) [user] subst_vars([0], [_126152|_126154], [], _79472)
^  Call: (261) [user] subst_vars(0, _126152, [], _127092)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _126152, [], _127092)
^  Unify: (261) [user] subst_vars(0, _126152, [], _127092)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _126152, [], _127092)
^  Unify: (261) [user] subst_vars(0, _126152, [], _127092)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _126152, [], _127092)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _126154, [], _79472)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _126154, [], _79472)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1419, 0], [1419, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            Ok(vec![", 1419, 0], [";;            Ok(vec![", 1419, 0], [], [])
   Call: (258) [system] compound_name_arguments(_79470, '$COMMENT', [";;            Ok(vec![", 1419, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT', [";;            Ok(vec![", 1419, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![", 1419, 0), '$COMMENT'(";;            Ok(vec![", 1419, 0), [], [])
   Call: (257) [system] _149510=metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![", 1419, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![", 1419, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![", 1419, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![", 1419, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![", 1419, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![", 1419, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![", 1419, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![", 1419, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![", 1419, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1420, 0, 50943, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$stream_position'(50943, 1420, 0, 50977)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _202238))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _202238))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _202238)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _202238)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _202238)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _202238)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _207850))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _207850))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _207850))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _207850))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _207850)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _207850)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _213436))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _213436))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _213436)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _213436)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _213436)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _213436)
   Call: (270) [system] var('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _213436)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$VAR'(_220896))
   Call: (270) [system] atom('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _213436)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _213436)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _213436)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _213436)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _213436)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _213436)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0)==[_230176, _230182]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _213436)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _213436)
   Call: (270) [system] is_list('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _213436)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _213436)
   Call: (270) [system] string('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _213436)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _213436)
   Call: (270) [system] compound('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
   Exit: (270) [system] compound('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _240378, _240380)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT', [";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0], _244120)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0], _244120)
   Call: (271) [apply] apply:maplist_([";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0], _244120, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0], [_246938|_246940], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;                vec![expr!(\"a\"), expr!(\"b\")],", _246938)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"a\"), expr!(\"b\")],", _246938)
   Call: (273) [system] var(";;                vec![expr!(\"a\"), expr!(\"b\")],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"a\"), expr!(\"b\")],", _246938)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"a\"), expr!(\"b\")],", '$VAR'(_251584))
   Call: (273) [system] atom(";;                vec![expr!(\"a\"), expr!(\"b\")],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"a\"), expr!(\"b\")],", _246938)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"a\"), expr!(\"b\")],", _246938)
   Call: (273) [system] ";;                vec![expr!(\"a\"), expr!(\"b\")],"==true
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"a\"), expr!(\"b\")],", _246938)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"a\"), expr!(\"b\")],", _246938)
   Call: (273) [system] ";;                vec![expr!(\"a\"), expr!(\"b\")],"==false
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"a\"), expr!(\"b\")],", _246938)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"a\"), expr!(\"b\")],", _246938)
   Call: (273) [system] ";;                vec![expr!(\"a\"), expr!(\"b\")],"==[_260864, _260870]
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"a\"), expr!(\"b\")],", _246938)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"a\"), expr!(\"b\")],", _246938)
   Call: (273) [system] is_list(";;                vec![expr!(\"a\"), expr!(\"b\")],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"a\"), expr!(\"b\")],", _246938)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"a\"), expr!(\"b\")],", _246938)
   Call: (273) [system] string(";;                vec![expr!(\"a\"), expr!(\"b\")],")
   Exit: (273) [system] string(";;                vec![expr!(\"a\"), expr!(\"b\")],")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"a\"), expr!(\"b\")],", _246938)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"a\"), expr!(\"b\")],", _246938)
   Call: (273) [system] compound(";;                vec![expr!(\"a\"), expr!(\"b\")],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"a\"), expr!(\"b\")],", _246938)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"a\"), expr!(\"b\")],", _246938)
^  Call: (273) [user] symbol(";;                vec![expr!(\"a\"), expr!(\"b\")],")
^  Unify: (273) [user] symbol(";;                vec![expr!(\"a\"), expr!(\"b\")],")
   Call: (274) [system] atom(";;                vec![expr!(\"a\"), expr!(\"b\")],")
   Fail: (274) [system] atom(";;                vec![expr!(\"a\"), expr!(\"b\")],")
^  Fail: (273) [user] symbol(";;                vec![expr!(\"a\"), expr!(\"b\")],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"a\"), expr!(\"b\")],", _246938)
   Call: (273) [system] ";;                vec![expr!(\"a\"), expr!(\"b\")],"=_246938
   Exit: (273) [system] ";;                vec![expr!(\"a\"), expr!(\"b\")],"=";;                vec![expr!(\"a\"), expr!(\"b\")],"
^  Exit: (272) [user] mfix_vars1(";;                vec![expr!(\"a\"), expr!(\"b\")],", ";;                vec![expr!(\"a\"), expr!(\"b\")],")
   Call: (272) [apply] apply:maplist_([1420, 0], _246940, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1420, 0], [_284936|_284938], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1420, _284936)
^  Unify: (273) [user] mfix_vars1(1420, _284936)
   Call: (274) [system] var(1420)
^  Redo: (273) [user] mfix_vars1(1420, _284936)
^  Unify: (273) [user] mfix_vars1(1420, '$VAR'(_289582))
   Call: (274) [system] atom(1420)
^  Redo: (273) [user] mfix_vars1(1420, _284936)
^  Unify: (273) [user] mfix_vars1(1420, _284936)
   Call: (274) [system] 1420==true
^  Redo: (273) [user] mfix_vars1(1420, _284936)
^  Unify: (273) [user] mfix_vars1(1420, _284936)
   Call: (274) [system] 1420==false
^  Redo: (273) [user] mfix_vars1(1420, _284936)
^  Unify: (273) [user] mfix_vars1(1420, _284936)
   Call: (274) [system] 1420==[_298862, _298868]
^  Redo: (273) [user] mfix_vars1(1420, _284936)
^  Unify: (273) [user] mfix_vars1(1420, _284936)
   Call: (274) [system] is_list(1420)
^  Redo: (273) [user] mfix_vars1(1420, _284936)
^  Unify: (273) [user] mfix_vars1(1420, _284936)
   Call: (274) [system] string(1420)
^  Redo: (273) [user] mfix_vars1(1420, _284936)
^  Unify: (273) [user] mfix_vars1(1420, _284936)
   Call: (274) [system] compound(1420)
^  Redo: (273) [user] mfix_vars1(1420, _284936)
^  Unify: (273) [user] mfix_vars1(1420, _284936)
^  Call: (274) [user] symbol(1420)
^  Unify: (274) [user] symbol(1420)
   Call: (275) [system] atom(1420)
   Fail: (275) [system] atom(1420)
^  Fail: (274) [user] symbol(1420)
^  Redo: (273) [user] mfix_vars1(1420, _284936)
   Call: (274) [system] 1420=_284936
   Exit: (274) [system] 1420=1420
^  Exit: (273) [user] mfix_vars1(1420, 1420)
   Call: (273) [apply] apply:maplist_([0], _284938, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_319262|_319264], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _319262)
^  Unify: (274) [user] mfix_vars1(0, _319262)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _319262)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_323908))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _319262)
^  Unify: (274) [user] mfix_vars1(0, _319262)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _319262)
^  Unify: (274) [user] mfix_vars1(0, _319262)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _319262)
^  Unify: (274) [user] mfix_vars1(0, _319262)
   Call: (275) [system] 0==[_333188, _333194]
^  Redo: (274) [user] mfix_vars1(0, _319262)
^  Unify: (274) [user] mfix_vars1(0, _319262)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _319262)
^  Unify: (274) [user] mfix_vars1(0, _319262)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _319262)
^  Unify: (274) [user] mfix_vars1(0, _319262)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _319262)
^  Unify: (274) [user] mfix_vars1(0, _319262)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _319262)
   Call: (275) [system] 0=_319262
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _319264, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1420, 0], [1420, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0], [";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0], [";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0])
   Call: (270) [system] compound_name_arguments(_213436, '$COMMENT', [";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT', [";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0)\=@='$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _207850)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _369436))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _369436))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _369436))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _369436))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _369436)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _369436)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _375022))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _375022))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _375022)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _375022)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _375022)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0)\=@='$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _369436)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _202238))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _202238))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _202238))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _202238))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _202238)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _202238)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _397342))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _397342))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _397342)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _397342)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _397342)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0)\=@='$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _202238)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0)))
   Call: (261) [system] '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0)\=@='$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _426120, [], _426122)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _426120, [], _426122)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _426120, [], _426122)
   Call: (258) [system] atom('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _426120, [], _426122)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _426120, [], _426122)
   Call: (258) [system] compound('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
   Exit: (258) [system] compound('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), _435436, _435438)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT', [";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0])
^  Call: (258) [user] subst_vars([";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0], _437322, [], _426122)
^  Unify: (258) [user] subst_vars([";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0], [";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0], [], [])
   Call: (259) [system] var([";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0])
^  Redo: (258) [user] subst_vars([";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0], _437322, [], _426122)
^  Unify: (258) [user] subst_vars([";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0], [_441058|_441060], [], _426122)
^  Call: (259) [user] subst_vars(";;                vec![expr!(\"a\"), expr!(\"b\")],", _441058, [], _441998)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"a\"), expr!(\"b\")],", ";;                vec![expr!(\"a\"), expr!(\"b\")],", [], [])
   Call: (260) [system] var(";;                vec![expr!(\"a\"), expr!(\"b\")],")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"a\"), expr!(\"b\")],", _441058, [], _441998)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"a\"), expr!(\"b\")],", _441058, [], _441998)
   Call: (260) [system] atom(";;                vec![expr!(\"a\"), expr!(\"b\")],")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"a\"), expr!(\"b\")],", _441058, [], _441998)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"a\"), expr!(\"b\")],", _441058, [], _441998)
   Call: (260) [system] compound(";;                vec![expr!(\"a\"), expr!(\"b\")],")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"a\"), expr!(\"b\")],", _441058, [], _441998)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"a\"), expr!(\"b\")],", ";;                vec![expr!(\"a\"), expr!(\"b\")],", [], [])
^  Exit: (259) [user] subst_vars(";;                vec![expr!(\"a\"), expr!(\"b\")],", ";;                vec![expr!(\"a\"), expr!(\"b\")],", [], [])
^  Call: (259) [user] subst_vars([1420, 0], _441060, [], _426122)
^  Unify: (259) [user] subst_vars([1420, 0], [1420, 0], [], [])
   Call: (260) [system] var([1420, 0])
^  Redo: (259) [user] subst_vars([1420, 0], _441060, [], _426122)
^  Unify: (259) [user] subst_vars([1420, 0], [_456930|_456932], [], _426122)
^  Call: (260) [user] subst_vars(1420, _456930, [], _457870)
^  Unify: (260) [user] subst_vars(1420, 1420, [], [])
   Call: (261) [system] var(1420)
^  Redo: (260) [user] subst_vars(1420, _456930, [], _457870)
^  Unify: (260) [user] subst_vars(1420, _456930, [], _457870)
   Call: (261) [system] atom(1420)
^  Redo: (260) [user] subst_vars(1420, _456930, [], _457870)
^  Unify: (260) [user] subst_vars(1420, _456930, [], _457870)
   Call: (261) [system] compound(1420)
^  Redo: (260) [user] subst_vars(1420, _456930, [], _457870)
^  Unify: (260) [user] subst_vars(1420, 1420, [], [])
^  Exit: (260) [user] subst_vars(1420, 1420, [], [])
^  Call: (260) [user] subst_vars([0], _456932, [], _426122)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _456932, [], _426122)
^  Unify: (260) [user] subst_vars([0], [_472802|_472804], [], _426122)
^  Call: (261) [user] subst_vars(0, _472802, [], _473742)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _472802, [], _473742)
^  Unify: (261) [user] subst_vars(0, _472802, [], _473742)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _472802, [], _473742)
^  Unify: (261) [user] subst_vars(0, _472802, [], _473742)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _472802, [], _473742)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _472804, [], _426122)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _472804, [], _426122)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1420, 0], [1420, 0], [], [])
^  Exit: (258) [user] subst_vars([";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0], [";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0], [], [])
   Call: (258) [system] compound_name_arguments(_426120, '$COMMENT', [";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT', [";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), [], [])
   Call: (257) [system] _496160=metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"a\"), expr!(\"b\")],", 1420, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1421, 0, 50991, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$stream_position'(50991, 1421, 0, 51025)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _31618))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _31618))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _31618)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _31618)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _31618)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _31618)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _37230))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _37230))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _37230))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _37230))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _37230)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _37230)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _42816))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _42816))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _42816)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _42816)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _42816)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _42816)
   Call: (270) [system] var('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _42816)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$VAR'(_50276))
   Call: (270) [system] atom('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _42816)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _42816)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _42816)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _42816)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _42816)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _42816)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0)==[_59556, _59562]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _42816)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _42816)
   Call: (270) [system] is_list('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _42816)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _42816)
   Call: (270) [system] string('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _42816)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _42816)
   Call: (270) [system] compound('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
   Exit: (270) [system] compound('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _69758, _69760)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT', [";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0], _73500)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0], _73500)
   Call: (271) [apply] apply:maplist_([";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0], _73500, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0], [_76318|_76320], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;                vec![expr!(\"quote\" (\"foo\"))],", _76318)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"quote\" (\"foo\"))],", _76318)
   Call: (273) [system] var(";;                vec![expr!(\"quote\" (\"foo\"))],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"quote\" (\"foo\"))],", _76318)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"quote\" (\"foo\"))],", '$VAR'(_80964))
   Call: (273) [system] atom(";;                vec![expr!(\"quote\" (\"foo\"))],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"quote\" (\"foo\"))],", _76318)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"quote\" (\"foo\"))],", _76318)
   Call: (273) [system] ";;                vec![expr!(\"quote\" (\"foo\"))],"==true
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"quote\" (\"foo\"))],", _76318)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"quote\" (\"foo\"))],", _76318)
   Call: (273) [system] ";;                vec![expr!(\"quote\" (\"foo\"))],"==false
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"quote\" (\"foo\"))],", _76318)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"quote\" (\"foo\"))],", _76318)
   Call: (273) [system] ";;                vec![expr!(\"quote\" (\"foo\"))],"==[_90244, _90250]
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"quote\" (\"foo\"))],", _76318)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"quote\" (\"foo\"))],", _76318)
   Call: (273) [system] is_list(";;                vec![expr!(\"quote\" (\"foo\"))],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"quote\" (\"foo\"))],", _76318)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"quote\" (\"foo\"))],", _76318)
   Call: (273) [system] string(";;                vec![expr!(\"quote\" (\"foo\"))],")
   Exit: (273) [system] string(";;                vec![expr!(\"quote\" (\"foo\"))],")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"quote\" (\"foo\"))],", _76318)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"quote\" (\"foo\"))],", _76318)
   Call: (273) [system] compound(";;                vec![expr!(\"quote\" (\"foo\"))],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"quote\" (\"foo\"))],", _76318)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"quote\" (\"foo\"))],", _76318)
^  Call: (273) [user] symbol(";;                vec![expr!(\"quote\" (\"foo\"))],")
^  Unify: (273) [user] symbol(";;                vec![expr!(\"quote\" (\"foo\"))],")
   Call: (274) [system] atom(";;                vec![expr!(\"quote\" (\"foo\"))],")
   Fail: (274) [system] atom(";;                vec![expr!(\"quote\" (\"foo\"))],")
^  Fail: (273) [user] symbol(";;                vec![expr!(\"quote\" (\"foo\"))],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"quote\" (\"foo\"))],", _76318)
   Call: (273) [system] ";;                vec![expr!(\"quote\" (\"foo\"))],"=_76318
   Exit: (273) [system] ";;                vec![expr!(\"quote\" (\"foo\"))],"=";;                vec![expr!(\"quote\" (\"foo\"))],"
^  Exit: (272) [user] mfix_vars1(";;                vec![expr!(\"quote\" (\"foo\"))],", ";;                vec![expr!(\"quote\" (\"foo\"))],")
   Call: (272) [apply] apply:maplist_([1421, 0], _76320, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1421, 0], [_114316|_114318], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1421, _114316)
^  Unify: (273) [user] mfix_vars1(1421, _114316)
   Call: (274) [system] var(1421)
^  Redo: (273) [user] mfix_vars1(1421, _114316)
^  Unify: (273) [user] mfix_vars1(1421, '$VAR'(_118962))
   Call: (274) [system] atom(1421)
^  Redo: (273) [user] mfix_vars1(1421, _114316)
^  Unify: (273) [user] mfix_vars1(1421, _114316)
   Call: (274) [system] 1421==true
^  Redo: (273) [user] mfix_vars1(1421, _114316)
^  Unify: (273) [user] mfix_vars1(1421, _114316)
   Call: (274) [system] 1421==false
^  Redo: (273) [user] mfix_vars1(1421, _114316)
^  Unify: (273) [user] mfix_vars1(1421, _114316)
   Call: (274) [system] 1421==[_128242, _128248]
^  Redo: (273) [user] mfix_vars1(1421, _114316)
^  Unify: (273) [user] mfix_vars1(1421, _114316)
   Call: (274) [system] is_list(1421)
^  Redo: (273) [user] mfix_vars1(1421, _114316)
^  Unify: (273) [user] mfix_vars1(1421, _114316)
   Call: (274) [system] string(1421)
^  Redo: (273) [user] mfix_vars1(1421, _114316)
^  Unify: (273) [user] mfix_vars1(1421, _114316)
   Call: (274) [system] compound(1421)
^  Redo: (273) [user] mfix_vars1(1421, _114316)
^  Unify: (273) [user] mfix_vars1(1421, _114316)
^  Call: (274) [user] symbol(1421)
^  Unify: (274) [user] symbol(1421)
   Call: (275) [system] atom(1421)
   Fail: (275) [system] atom(1421)
^  Fail: (274) [user] symbol(1421)
^  Redo: (273) [user] mfix_vars1(1421, _114316)
   Call: (274) [system] 1421=_114316
   Exit: (274) [system] 1421=1421
^  Exit: (273) [user] mfix_vars1(1421, 1421)
   Call: (273) [apply] apply:maplist_([0], _114318, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_148642|_148644], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _148642)
^  Unify: (274) [user] mfix_vars1(0, _148642)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _148642)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_153288))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _148642)
^  Unify: (274) [user] mfix_vars1(0, _148642)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _148642)
^  Unify: (274) [user] mfix_vars1(0, _148642)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _148642)
^  Unify: (274) [user] mfix_vars1(0, _148642)
   Call: (275) [system] 0==[_162568, _162574]
^  Redo: (274) [user] mfix_vars1(0, _148642)
^  Unify: (274) [user] mfix_vars1(0, _148642)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _148642)
^  Unify: (274) [user] mfix_vars1(0, _148642)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _148642)
^  Unify: (274) [user] mfix_vars1(0, _148642)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _148642)
^  Unify: (274) [user] mfix_vars1(0, _148642)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _148642)
   Call: (275) [system] 0=_148642
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _148644, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1421, 0], [1421, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0], [";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0], [";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0])
   Call: (270) [system] compound_name_arguments(_42816, '$COMMENT', [";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT', [";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0)\=@='$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _37230)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _198816))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _198816))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _198816))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _198816))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _198816)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _198816)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _204402))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _204402))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _204402)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _204402)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _204402)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0)\=@='$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _198816)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _31618))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _31618))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _31618))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _31618))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _31618)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _31618)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _226722))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _226722))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _226722)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _226722)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _226722)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0)\=@='$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _31618)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0)))
   Call: (261) [system] '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0)\=@='$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _255500, [], _255502)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _255500, [], _255502)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _255500, [], _255502)
   Call: (258) [system] atom('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _255500, [], _255502)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _255500, [], _255502)
   Call: (258) [system] compound('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
   Exit: (258) [system] compound('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), _264816, _264818)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT', [";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0])
^  Call: (258) [user] subst_vars([";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0], _266702, [], _255502)
^  Unify: (258) [user] subst_vars([";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0], [";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0], [], [])
   Call: (259) [system] var([";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0])
^  Redo: (258) [user] subst_vars([";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0], _266702, [], _255502)
^  Unify: (258) [user] subst_vars([";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0], [_270438|_270440], [], _255502)
^  Call: (259) [user] subst_vars(";;                vec![expr!(\"quote\" (\"foo\"))],", _270438, [], _271378)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"quote\" (\"foo\"))],", ";;                vec![expr!(\"quote\" (\"foo\"))],", [], [])
   Call: (260) [system] var(";;                vec![expr!(\"quote\" (\"foo\"))],")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"quote\" (\"foo\"))],", _270438, [], _271378)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"quote\" (\"foo\"))],", _270438, [], _271378)
   Call: (260) [system] atom(";;                vec![expr!(\"quote\" (\"foo\"))],")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"quote\" (\"foo\"))],", _270438, [], _271378)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"quote\" (\"foo\"))],", _270438, [], _271378)
   Call: (260) [system] compound(";;                vec![expr!(\"quote\" (\"foo\"))],")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"quote\" (\"foo\"))],", _270438, [], _271378)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"quote\" (\"foo\"))],", ";;                vec![expr!(\"quote\" (\"foo\"))],", [], [])
^  Exit: (259) [user] subst_vars(";;                vec![expr!(\"quote\" (\"foo\"))],", ";;                vec![expr!(\"quote\" (\"foo\"))],", [], [])
^  Call: (259) [user] subst_vars([1421, 0], _270440, [], _255502)
^  Unify: (259) [user] subst_vars([1421, 0], [1421, 0], [], [])
   Call: (260) [system] var([1421, 0])
^  Redo: (259) [user] subst_vars([1421, 0], _270440, [], _255502)
^  Unify: (259) [user] subst_vars([1421, 0], [_286310|_286312], [], _255502)
^  Call: (260) [user] subst_vars(1421, _286310, [], _287250)
^  Unify: (260) [user] subst_vars(1421, 1421, [], [])
   Call: (261) [system] var(1421)
^  Redo: (260) [user] subst_vars(1421, _286310, [], _287250)
^  Unify: (260) [user] subst_vars(1421, _286310, [], _287250)
   Call: (261) [system] atom(1421)
^  Redo: (260) [user] subst_vars(1421, _286310, [], _287250)
^  Unify: (260) [user] subst_vars(1421, _286310, [], _287250)
   Call: (261) [system] compound(1421)
^  Redo: (260) [user] subst_vars(1421, _286310, [], _287250)
^  Unify: (260) [user] subst_vars(1421, 1421, [], [])
^  Exit: (260) [user] subst_vars(1421, 1421, [], [])
^  Call: (260) [user] subst_vars([0], _286312, [], _255502)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _286312, [], _255502)
^  Unify: (260) [user] subst_vars([0], [_302182|_302184], [], _255502)
^  Call: (261) [user] subst_vars(0, _302182, [], _303122)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _302182, [], _303122)
^  Unify: (261) [user] subst_vars(0, _302182, [], _303122)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _302182, [], _303122)
^  Unify: (261) [user] subst_vars(0, _302182, [], _303122)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _302182, [], _303122)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _302184, [], _255502)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _302184, [], _255502)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1421, 0], [1421, 0], [], [])
^  Exit: (258) [user] subst_vars([";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0], [";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0], [], [])
   Call: (258) [system] compound_name_arguments(_255500, '$COMMENT', [";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT', [";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), [], [])
   Call: (257) [system] _325540=metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"quote\" (\"foo\"))],", 1421, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1422, 0, 51039, '$COMMENT'(";;            ]));", 1422, 0), '$stream_position'(51039, 1422, 0, 51073)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ]));", 1422, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ]));", 1422, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            ]));", 1422, 0), _378260))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            ]));", 1422, 0), _378260))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            ]));", 1422, 0), _378260)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            ]));", 1422, 0), _378260)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            ]));", 1422, 0), _378260)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            ]));", 1422, 0), _378260)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            ]));", 1422, 0), _383872))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            ]));", 1422, 0), _383872))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            ]));", 1422, 0), _383872))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            ]));", 1422, 0), _383872))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ]));", 1422, 0), _383872)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ]));", 1422, 0), _383872)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            ]));", 1422, 0), _389458))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            ]));", 1422, 0), _389458))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            ]));", 1422, 0), _389458)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            ]));", 1422, 0), _389458)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1422, 0), _389458)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1422, 0), _389458)
   Call: (270) [system] var('$COMMENT'(";;            ]));", 1422, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1422, 0), _389458)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1422, 0), '$VAR'(_396918))
   Call: (270) [system] atom('$COMMENT'(";;            ]));", 1422, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1422, 0), _389458)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1422, 0), _389458)
   Call: (270) [system] '$COMMENT'(";;            ]));", 1422, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1422, 0), _389458)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1422, 0), _389458)
   Call: (270) [system] '$COMMENT'(";;            ]));", 1422, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1422, 0), _389458)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1422, 0), _389458)
   Call: (270) [system] '$COMMENT'(";;            ]));", 1422, 0)==[_406198, _406204]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1422, 0), _389458)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1422, 0), _389458)
   Call: (270) [system] is_list('$COMMENT'(";;            ]));", 1422, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1422, 0), _389458)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1422, 0), _389458)
   Call: (270) [system] string('$COMMENT'(";;            ]));", 1422, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1422, 0), _389458)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1422, 0), _389458)
   Call: (270) [system] compound('$COMMENT'(";;            ]));", 1422, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            ]));", 1422, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            ]));", 1422, 0), _416400, _416402)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            ]));", 1422, 0), '$COMMENT', [";;            ]));", 1422, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            ]));", 1422, 0], _420142)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            ]));", 1422, 0], _420142)
   Call: (271) [apply] apply:maplist_([";;            ]));", 1422, 0], _420142, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            ]));", 1422, 0], [_422960|_422962], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            ]));", _422960)
^  Unify: (272) [user] mfix_vars1(";;            ]));", _422960)
   Call: (273) [system] var(";;            ]));")
^  Redo: (272) [user] mfix_vars1(";;            ]));", _422960)
^  Unify: (272) [user] mfix_vars1(";;            ]));", '$VAR'(_427606))
   Call: (273) [system] atom(";;            ]));")
^  Redo: (272) [user] mfix_vars1(";;            ]));", _422960)
^  Unify: (272) [user] mfix_vars1(";;            ]));", _422960)
   Call: (273) [system] ";;            ]));"==true
^  Redo: (272) [user] mfix_vars1(";;            ]));", _422960)
^  Unify: (272) [user] mfix_vars1(";;            ]));", _422960)
   Call: (273) [system] ";;            ]));"==false
^  Redo: (272) [user] mfix_vars1(";;            ]));", _422960)
^  Unify: (272) [user] mfix_vars1(";;            ]));", _422960)
   Call: (273) [system] ";;            ]));"==[_436886, _436892]
^  Redo: (272) [user] mfix_vars1(";;            ]));", _422960)
^  Unify: (272) [user] mfix_vars1(";;            ]));", _422960)
   Call: (273) [system] is_list(";;            ]));")
^  Redo: (272) [user] mfix_vars1(";;            ]));", _422960)
^  Unify: (272) [user] mfix_vars1(";;            ]));", _422960)
   Call: (273) [system] string(";;            ]));")
   Exit: (273) [system] string(";;            ]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            ]));", _422960)
^  Unify: (272) [user] mfix_vars1(";;            ]));", _422960)
   Call: (273) [system] compound(";;            ]));")
^  Redo: (272) [user] mfix_vars1(";;            ]));", _422960)
^  Unify: (272) [user] mfix_vars1(";;            ]));", _422960)
^  Call: (273) [user] symbol(";;            ]));")
^  Unify: (273) [user] symbol(";;            ]));")
   Call: (274) [system] atom(";;            ]));")
   Fail: (274) [system] atom(";;            ]));")
^  Fail: (273) [user] symbol(";;            ]));")
^  Redo: (272) [user] mfix_vars1(";;            ]));", _422960)
   Call: (273) [system] ";;            ]));"=_422960
   Exit: (273) [system] ";;            ]));"=";;            ]));"
^  Exit: (272) [user] mfix_vars1(";;            ]));", ";;            ]));")
   Call: (272) [apply] apply:maplist_([1422, 0], _422962, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1422, 0], [_460958|_460960], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1422, _460958)
^  Unify: (273) [user] mfix_vars1(1422, _460958)
   Call: (274) [system] var(1422)
^  Redo: (273) [user] mfix_vars1(1422, _460958)
^  Unify: (273) [user] mfix_vars1(1422, '$VAR'(_465604))
   Call: (274) [system] atom(1422)
^  Redo: (273) [user] mfix_vars1(1422, _460958)
^  Unify: (273) [user] mfix_vars1(1422, _460958)
   Call: (274) [system] 1422==true
^  Redo: (273) [user] mfix_vars1(1422, _460958)
^  Unify: (273) [user] mfix_vars1(1422, _460958)
   Call: (274) [system] 1422==false
^  Redo: (273) [user] mfix_vars1(1422, _460958)
^  Unify: (273) [user] mfix_vars1(1422, _460958)
   Call: (274) [system] 1422==[_474884, _474890]
^  Redo: (273) [user] mfix_vars1(1422, _460958)
^  Unify: (273) [user] mfix_vars1(1422, _460958)
   Call: (274) [system] is_list(1422)
^  Redo: (273) [user] mfix_vars1(1422, _460958)
^  Unify: (273) [user] mfix_vars1(1422, _460958)
   Call: (274) [system] string(1422)
^  Redo: (273) [user] mfix_vars1(1422, _460958)
^  Unify: (273) [user] mfix_vars1(1422, _460958)
   Call: (274) [system] compound(1422)
^  Redo: (273) [user] mfix_vars1(1422, _460958)
^  Unify: (273) [user] mfix_vars1(1422, _460958)
^  Call: (274) [user] symbol(1422)
^  Unify: (274) [user] symbol(1422)
   Call: (275) [system] atom(1422)
   Fail: (275) [system] atom(1422)
^  Fail: (274) [user] symbol(1422)
^  Redo: (273) [user] mfix_vars1(1422, _460958)
   Call: (274) [system] 1422=_460958
   Exit: (274) [system] 1422=1422
^  Exit: (273) [user] mfix_vars1(1422, 1422)
   Call: (273) [apply] apply:maplist_([0], _460960, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_495284|_495286], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _495284)
^  Unify: (274) [user] mfix_vars1(0, _495284)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _495284)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_499930))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _495284)
^  Unify: (274) [user] mfix_vars1(0, _495284)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _495284)
^  Unify: (274) [user] mfix_vars1(0, _495284)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _495284)
^  Unify: (274) [user] mfix_vars1(0, _495284)
   Call: (275) [system] 0==[_509210, _509216]
^  Redo: (274) [user] mfix_vars1(0, _495284)
^  Unify: (274) [user] mfix_vars1(0, _495284)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _495284)
^  Unify: (274) [user] mfix_vars1(0, _495284)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _495284)
^  Unify: (274) [user] mfix_vars1(0, _495284)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _495284)
^  Unify: (274) [user] mfix_vars1(0, _495284)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6038)
   Call: (275) [system] 0=_6038
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6040, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1422, 0], [1422, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            ]));", 1422, 0], [";;            ]));", 1422, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            ]));", 1422, 0], [";;            ]));", 1422, 0])
   Call: (270) [system] compound_name_arguments(_5980, '$COMMENT', [";;            ]));", 1422, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            ]));", 1422, 0), '$COMMENT', [";;            ]));", 1422, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0)))
   Call: (267) [system] '$COMMENT'(";;            ]));", 1422, 0)\=@='$COMMENT'(";;            ]));", 1422, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ]));", 1422, 0), _5966)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            ]));", 1422, 0), _27410))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            ]));", 1422, 0), _27410))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            ]));", 1422, 0), _27410))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            ]));", 1422, 0), _27410))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ]));", 1422, 0), _27410)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ]));", 1422, 0), _27410)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            ]));", 1422, 0), _32996))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            ]));", 1422, 0), _32996))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            ]));", 1422, 0), _32996)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            ]));", 1422, 0), _32996)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            ]));", 1422, 0), _32996)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0)))
   Call: (267) [system] '$COMMENT'(";;            ]));", 1422, 0)\=@='$COMMENT'(";;            ]));", 1422, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ]));", 1422, 0), _27410)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            ]));", 1422, 0), _5946))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            ]));", 1422, 0), _5946))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            ]));", 1422, 0), _5946))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            ]));", 1422, 0), _5946))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ]));", 1422, 0), _5946)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ]));", 1422, 0), _5946)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            ]));", 1422, 0), _55316))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            ]));", 1422, 0), _55316))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            ]));", 1422, 0), _55316)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            ]));", 1422, 0), _55316)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            ]));", 1422, 0), _55316)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0)))
   Call: (267) [system] '$COMMENT'(";;            ]));", 1422, 0)\=@='$COMMENT'(";;            ]));", 1422, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ]));", 1422, 0), _5946)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0)))
   Call: (261) [system] '$COMMENT'(";;            ]));", 1422, 0)\=@='$COMMENT'(";;            ]));", 1422, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ]));", 1422, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ]));", 1422, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ]));", 1422, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ]));", 1422, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ]));", 1422, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            ]));", 1422, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            ]));", 1422, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            ]));", 1422, 0), _84094, [], _84096)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            ]));", 1422, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            ]));", 1422, 0), _84094, [], _84096)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            ]));", 1422, 0), _84094, [], _84096)
   Call: (258) [system] atom('$COMMENT'(";;            ]));", 1422, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            ]));", 1422, 0), _84094, [], _84096)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            ]));", 1422, 0), _84094, [], _84096)
   Call: (258) [system] compound('$COMMENT'(";;            ]));", 1422, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            ]));", 1422, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            ]));", 1422, 0), _93410, _93412)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            ]));", 1422, 0), '$COMMENT', [";;            ]));", 1422, 0])
^  Call: (258) [user] subst_vars([";;            ]));", 1422, 0], _95296, [], _84096)
^  Unify: (258) [user] subst_vars([";;            ]));", 1422, 0], [";;            ]));", 1422, 0], [], [])
   Call: (259) [system] var([";;            ]));", 1422, 0])
^  Redo: (258) [user] subst_vars([";;            ]));", 1422, 0], _95296, [], _84096)
^  Unify: (258) [user] subst_vars([";;            ]));", 1422, 0], [_99032|_99034], [], _84096)
^  Call: (259) [user] subst_vars(";;            ]));", _99032, [], _99972)
^  Unify: (259) [user] subst_vars(";;            ]));", ";;            ]));", [], [])
   Call: (260) [system] var(";;            ]));")
^  Redo: (259) [user] subst_vars(";;            ]));", _99032, [], _99972)
^  Unify: (259) [user] subst_vars(";;            ]));", _99032, [], _99972)
   Call: (260) [system] atom(";;            ]));")
^  Redo: (259) [user] subst_vars(";;            ]));", _99032, [], _99972)
^  Unify: (259) [user] subst_vars(";;            ]));", _99032, [], _99972)
   Call: (260) [system] compound(";;            ]));")
^  Redo: (259) [user] subst_vars(";;            ]));", _99032, [], _99972)
^  Unify: (259) [user] subst_vars(";;            ]));", ";;            ]));", [], [])
^  Exit: (259) [user] subst_vars(";;            ]));", ";;            ]));", [], [])
^  Call: (259) [user] subst_vars([1422, 0], _99034, [], _84096)
^  Unify: (259) [user] subst_vars([1422, 0], [1422, 0], [], [])
   Call: (260) [system] var([1422, 0])
^  Redo: (259) [user] subst_vars([1422, 0], _99034, [], _84096)
^  Unify: (259) [user] subst_vars([1422, 0], [_114904|_114906], [], _84096)
^  Call: (260) [user] subst_vars(1422, _114904, [], _115844)
^  Unify: (260) [user] subst_vars(1422, 1422, [], [])
   Call: (261) [system] var(1422)
^  Redo: (260) [user] subst_vars(1422, _114904, [], _115844)
^  Unify: (260) [user] subst_vars(1422, _114904, [], _115844)
   Call: (261) [system] atom(1422)
^  Redo: (260) [user] subst_vars(1422, _114904, [], _115844)
^  Unify: (260) [user] subst_vars(1422, _114904, [], _115844)
   Call: (261) [system] compound(1422)
^  Redo: (260) [user] subst_vars(1422, _114904, [], _115844)
^  Unify: (260) [user] subst_vars(1422, 1422, [], [])
^  Exit: (260) [user] subst_vars(1422, 1422, [], [])
^  Call: (260) [user] subst_vars([0], _114906, [], _84096)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _114906, [], _84096)
^  Unify: (260) [user] subst_vars([0], [_130776|_130778], [], _84096)
^  Call: (261) [user] subst_vars(0, _130776, [], _131716)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _130776, [], _131716)
^  Unify: (261) [user] subst_vars(0, _130776, [], _131716)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _130776, [], _131716)
^  Unify: (261) [user] subst_vars(0, _130776, [], _131716)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _130776, [], _131716)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _130778, [], _84096)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _130778, [], _84096)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1422, 0], [1422, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            ]));", 1422, 0], [";;            ]));", 1422, 0], [], [])
   Call: (258) [system] compound_name_arguments(_84094, '$COMMENT', [";;            ]));", 1422, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            ]));", 1422, 0), '$COMMENT', [";;            ]));", 1422, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            ]));", 1422, 0), '$COMMENT'(";;            ]));", 1422, 0), [], [])
   Call: (257) [system] _154134=metta_file_buffer(+, '$COMMENT'(";;            ]));", 1422, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            ]));", 1422, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            ]));", 1422, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            ]));", 1422, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            ]));", 1422, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ]));", 1422, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ]));", 1422, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ]));", 1422, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ]));", 1422, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1423, 0, 51058, '$COMMENT'(";;    }", 1423, 0), '$stream_position'(51058, 1423, 0, 51092)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1423, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1423, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    }", 1423, 0), _206852))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1423, 0), _206852))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    }", 1423, 0), _206852)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1423, 0), _206852)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1423, 0), _206852)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1423, 0), _206852)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    }", 1423, 0), _212464))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1423, 0), _212464))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1423, 0), _212464))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1423, 0), _212464))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1423, 0), _212464)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1423, 0), _212464)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    }", 1423, 0), _218050))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1423, 0), _218050))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    }", 1423, 0), _218050)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1423, 0), _218050)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1423, 0), _218050)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1423, 0), _218050)
   Call: (270) [system] var('$COMMENT'(";;    }", 1423, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1423, 0), _218050)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1423, 0), '$VAR'(_225510))
   Call: (270) [system] atom('$COMMENT'(";;    }", 1423, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1423, 0), _218050)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1423, 0), _218050)
   Call: (270) [system] '$COMMENT'(";;    }", 1423, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1423, 0), _218050)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1423, 0), _218050)
   Call: (270) [system] '$COMMENT'(";;    }", 1423, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1423, 0), _218050)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1423, 0), _218050)
   Call: (270) [system] '$COMMENT'(";;    }", 1423, 0)==[_234790, _234796]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1423, 0), _218050)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1423, 0), _218050)
   Call: (270) [system] is_list('$COMMENT'(";;    }", 1423, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1423, 0), _218050)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1423, 0), _218050)
   Call: (270) [system] string('$COMMENT'(";;    }", 1423, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1423, 0), _218050)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1423, 0), _218050)
   Call: (270) [system] compound('$COMMENT'(";;    }", 1423, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    }", 1423, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1423, 0), _244992, _244994)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1423, 0), '$COMMENT', [";;    }", 1423, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    }", 1423, 0], _248734)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1423, 0], _248734)
   Call: (271) [apply] apply:maplist_([";;    }", 1423, 0], _248734, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    }", 1423, 0], [_251552|_251554], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    }", _251552)
^  Unify: (272) [user] mfix_vars1(";;    }", _251552)
   Call: (273) [system] var(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _251552)
^  Unify: (272) [user] mfix_vars1(";;    }", '$VAR'(_256198))
   Call: (273) [system] atom(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _251552)
^  Unify: (272) [user] mfix_vars1(";;    }", _251552)
   Call: (273) [system] ";;    }"==true
^  Redo: (272) [user] mfix_vars1(";;    }", _251552)
^  Unify: (272) [user] mfix_vars1(";;    }", _251552)
   Call: (273) [system] ";;    }"==false
^  Redo: (272) [user] mfix_vars1(";;    }", _251552)
^  Unify: (272) [user] mfix_vars1(";;    }", _251552)
   Call: (273) [system] ";;    }"==[_265478, _265484]
^  Redo: (272) [user] mfix_vars1(";;    }", _251552)
^  Unify: (272) [user] mfix_vars1(";;    }", _251552)
   Call: (273) [system] is_list(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _251552)
^  Unify: (272) [user] mfix_vars1(";;    }", _251552)
   Call: (273) [system] string(";;    }")
   Exit: (273) [system] string(";;    }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    }", _251552)
^  Unify: (272) [user] mfix_vars1(";;    }", _251552)
   Call: (273) [system] compound(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _251552)
^  Unify: (272) [user] mfix_vars1(";;    }", _251552)
^  Call: (273) [user] symbol(";;    }")
^  Unify: (273) [user] symbol(";;    }")
   Call: (274) [system] atom(";;    }")
   Fail: (274) [system] atom(";;    }")
^  Fail: (273) [user] symbol(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _251552)
   Call: (273) [system] ";;    }"=_251552
   Exit: (273) [system] ";;    }"=";;    }"
^  Exit: (272) [user] mfix_vars1(";;    }", ";;    }")
   Call: (272) [apply] apply:maplist_([1423, 0], _251554, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1423, 0], [_289550|_289552], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1423, _289550)
^  Unify: (273) [user] mfix_vars1(1423, _289550)
   Call: (274) [system] var(1423)
^  Redo: (273) [user] mfix_vars1(1423, _289550)
^  Unify: (273) [user] mfix_vars1(1423, '$VAR'(_294196))
   Call: (274) [system] atom(1423)
^  Redo: (273) [user] mfix_vars1(1423, _289550)
^  Unify: (273) [user] mfix_vars1(1423, _289550)
   Call: (274) [system] 1423==true
^  Redo: (273) [user] mfix_vars1(1423, _289550)
^  Unify: (273) [user] mfix_vars1(1423, _289550)
   Call: (274) [system] 1423==false
^  Redo: (273) [user] mfix_vars1(1423, _289550)
^  Unify: (273) [user] mfix_vars1(1423, _289550)
   Call: (274) [system] 1423==[_303476, _303482]
^  Redo: (273) [user] mfix_vars1(1423, _289550)
^  Unify: (273) [user] mfix_vars1(1423, _289550)
   Call: (274) [system] is_list(1423)
^  Redo: (273) [user] mfix_vars1(1423, _289550)
^  Unify: (273) [user] mfix_vars1(1423, _289550)
   Call: (274) [system] string(1423)
^  Redo: (273) [user] mfix_vars1(1423, _289550)
^  Unify: (273) [user] mfix_vars1(1423, _289550)
   Call: (274) [system] compound(1423)
^  Redo: (273) [user] mfix_vars1(1423, _289550)
^  Unify: (273) [user] mfix_vars1(1423, _289550)
^  Call: (274) [user] symbol(1423)
^  Unify: (274) [user] symbol(1423)
   Call: (275) [system] atom(1423)
   Fail: (275) [system] atom(1423)
^  Fail: (274) [user] symbol(1423)
^  Redo: (273) [user] mfix_vars1(1423, _289550)
   Call: (274) [system] 1423=_289550
   Exit: (274) [system] 1423=1423
^  Exit: (273) [user] mfix_vars1(1423, 1423)
   Call: (273) [apply] apply:maplist_([0], _289552, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_323876|_323878], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _323876)
^  Unify: (274) [user] mfix_vars1(0, _323876)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _323876)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_328522))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _323876)
^  Unify: (274) [user] mfix_vars1(0, _323876)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _323876)
^  Unify: (274) [user] mfix_vars1(0, _323876)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _323876)
^  Unify: (274) [user] mfix_vars1(0, _323876)
   Call: (275) [system] 0==[_337802, _337808]
^  Redo: (274) [user] mfix_vars1(0, _323876)
^  Unify: (274) [user] mfix_vars1(0, _323876)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _323876)
^  Unify: (274) [user] mfix_vars1(0, _323876)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _323876)
^  Unify: (274) [user] mfix_vars1(0, _323876)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _323876)
^  Unify: (274) [user] mfix_vars1(0, _323876)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _323876)
   Call: (275) [system] 0=_323876
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _323878, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1423, 0], [1423, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    }", 1423, 0], [";;    }", 1423, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1423, 0], [";;    }", 1423, 0])
   Call: (270) [system] compound_name_arguments(_218050, '$COMMENT', [";;    }", 1423, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1423, 0), '$COMMENT', [";;    }", 1423, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1423, 0)\=@='$COMMENT'(";;    }", 1423, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1423, 0), _212464)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    }", 1423, 0), _374050))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1423, 0), _374050))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1423, 0), _374050))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1423, 0), _374050))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1423, 0), _374050)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1423, 0), _374050)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    }", 1423, 0), _379636))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1423, 0), _379636))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    }", 1423, 0), _379636)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1423, 0), _379636)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    }", 1423, 0), _379636)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1423, 0)\=@='$COMMENT'(";;    }", 1423, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1423, 0), _374050)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    }", 1423, 0), _206852))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1423, 0), _206852))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1423, 0), _206852))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1423, 0), _206852))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1423, 0), _206852)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1423, 0), _206852)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    }", 1423, 0), _401956))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1423, 0), _401956))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    }", 1423, 0), _401956)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1423, 0), _401956)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    }", 1423, 0), _401956)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1423, 0)\=@='$COMMENT'(";;    }", 1423, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1423, 0), _206852)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0)))
   Call: (261) [system] '$COMMENT'(";;    }", 1423, 0)\=@='$COMMENT'(";;    }", 1423, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1423, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1423, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1423, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1423, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1423, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    }", 1423, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    }", 1423, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    }", 1423, 0), _430734, [], _430736)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    }", 1423, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1423, 0), _430734, [], _430736)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1423, 0), _430734, [], _430736)
   Call: (258) [system] atom('$COMMENT'(";;    }", 1423, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1423, 0), _430734, [], _430736)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1423, 0), _430734, [], _430736)
   Call: (258) [system] compound('$COMMENT'(";;    }", 1423, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    }", 1423, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1423, 0), _440050, _440052)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1423, 0), '$COMMENT', [";;    }", 1423, 0])
^  Call: (258) [user] subst_vars([";;    }", 1423, 0], _441936, [], _430736)
^  Unify: (258) [user] subst_vars([";;    }", 1423, 0], [";;    }", 1423, 0], [], [])
   Call: (259) [system] var([";;    }", 1423, 0])
^  Redo: (258) [user] subst_vars([";;    }", 1423, 0], _441936, [], _430736)
^  Unify: (258) [user] subst_vars([";;    }", 1423, 0], [_445672|_445674], [], _430736)
^  Call: (259) [user] subst_vars(";;    }", _445672, [], _446612)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
   Call: (260) [system] var(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _445672, [], _446612)
^  Unify: (259) [user] subst_vars(";;    }", _445672, [], _446612)
   Call: (260) [system] atom(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _445672, [], _446612)
^  Unify: (259) [user] subst_vars(";;    }", _445672, [], _446612)
   Call: (260) [system] compound(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _445672, [], _446612)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Exit: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Call: (259) [user] subst_vars([1423, 0], _445674, [], _430736)
^  Unify: (259) [user] subst_vars([1423, 0], [1423, 0], [], [])
   Call: (260) [system] var([1423, 0])
^  Redo: (259) [user] subst_vars([1423, 0], _445674, [], _430736)
^  Unify: (259) [user] subst_vars([1423, 0], [_461544|_461546], [], _430736)
^  Call: (260) [user] subst_vars(1423, _461544, [], _462484)
^  Unify: (260) [user] subst_vars(1423, 1423, [], [])
   Call: (261) [system] var(1423)
^  Redo: (260) [user] subst_vars(1423, _461544, [], _462484)
^  Unify: (260) [user] subst_vars(1423, _461544, [], _462484)
   Call: (261) [system] atom(1423)
^  Redo: (260) [user] subst_vars(1423, _461544, [], _462484)
^  Unify: (260) [user] subst_vars(1423, _461544, [], _462484)
   Call: (261) [system] compound(1423)
^  Redo: (260) [user] subst_vars(1423, _461544, [], _462484)
^  Unify: (260) [user] subst_vars(1423, 1423, [], [])
^  Exit: (260) [user] subst_vars(1423, 1423, [], [])
^  Call: (260) [user] subst_vars([0], _461546, [], _430736)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _461546, [], _430736)
^  Unify: (260) [user] subst_vars([0], [_477416|_477418], [], _430736)
^  Call: (261) [user] subst_vars(0, _477416, [], _478356)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _477416, [], _478356)
^  Unify: (261) [user] subst_vars(0, _477416, [], _478356)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _477416, [], _478356)
^  Unify: (261) [user] subst_vars(0, _477416, [], _478356)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _477416, [], _478356)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _477418, [], _430736)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _477418, [], _430736)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1423, 0], [1423, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    }", 1423, 0], [";;    }", 1423, 0], [], [])
   Call: (258) [system] compound_name_arguments(_430734, '$COMMENT', [";;    }", 1423, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1423, 0), '$COMMENT', [";;    }", 1423, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    }", 1423, 0), '$COMMENT'(";;    }", 1423, 0), [], [])
   Call: (257) [system] _500774=metta_file_buffer(+, '$COMMENT'(";;    }", 1423, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    }", 1423, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    }", 1423, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1423, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1423, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1423, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1423, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1423, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1423, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1424, 0, 51066, '$COMMENT'(";; Converted:", 1424, 0), '$stream_position'(51066, 1424, 0, 51100)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1424, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1424, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1424, 0), _36422))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1424, 0), _36422))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1424, 0), _36422)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1424, 0), _36422)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1424, 0), _36422)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1424, 0), _36422)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1424, 0), _42034))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1424, 0), _42034))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1424, 0), _42034))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1424, 0), _42034))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1424, 0), _42034)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1424, 0), _42034)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1424, 0), _47620))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1424, 0), _47620))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1424, 0), _47620)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1424, 0), _47620)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1424, 0), _47620)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1424, 0), _47620)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1424, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1424, 0), _47620)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1424, 0), '$VAR'(_55080))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1424, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1424, 0), _47620)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1424, 0), _47620)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1424, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1424, 0), _47620)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1424, 0), _47620)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1424, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1424, 0), _47620)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1424, 0), _47620)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1424, 0)==[_64360, _64366]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1424, 0), _47620)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1424, 0), _47620)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1424, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1424, 0), _47620)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1424, 0), _47620)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1424, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1424, 0), _47620)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1424, 0), _47620)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1424, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1424, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1424, 0), _74562, _74564)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1424, 0), '$COMMENT', [";; Converted:", 1424, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1424, 0], _78304)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1424, 0], _78304)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1424, 0], _78304, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1424, 0], [_81122|_81124], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _81122)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _81122)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _81122)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_85768))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _81122)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _81122)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _81122)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _81122)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _81122)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _81122)
   Call: (273) [system] ";; Converted:"==[_95048, _95054]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _81122)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _81122)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _81122)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _81122)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _81122)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _81122)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _81122)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _81122)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _81122)
   Call: (273) [system] ";; Converted:"=_81122
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1424, 0], _81124, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1424, 0], [_119120|_119122], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1424, _119120)
^  Unify: (273) [user] mfix_vars1(1424, _119120)
   Call: (274) [system] var(1424)
^  Redo: (273) [user] mfix_vars1(1424, _119120)
^  Unify: (273) [user] mfix_vars1(1424, '$VAR'(_123766))
   Call: (274) [system] atom(1424)
^  Redo: (273) [user] mfix_vars1(1424, _119120)
^  Unify: (273) [user] mfix_vars1(1424, _119120)
   Call: (274) [system] 1424==true
^  Redo: (273) [user] mfix_vars1(1424, _119120)
^  Unify: (273) [user] mfix_vars1(1424, _119120)
   Call: (274) [system] 1424==false
^  Redo: (273) [user] mfix_vars1(1424, _119120)
^  Unify: (273) [user] mfix_vars1(1424, _119120)
   Call: (274) [system] 1424==[_133046, _133052]
^  Redo: (273) [user] mfix_vars1(1424, _119120)
^  Unify: (273) [user] mfix_vars1(1424, _119120)
   Call: (274) [system] is_list(1424)
^  Redo: (273) [user] mfix_vars1(1424, _119120)
^  Unify: (273) [user] mfix_vars1(1424, _119120)
   Call: (274) [system] string(1424)
^  Redo: (273) [user] mfix_vars1(1424, _119120)
^  Unify: (273) [user] mfix_vars1(1424, _119120)
   Call: (274) [system] compound(1424)
^  Redo: (273) [user] mfix_vars1(1424, _119120)
^  Unify: (273) [user] mfix_vars1(1424, _119120)
^  Call: (274) [user] symbol(1424)
^  Unify: (274) [user] symbol(1424)
   Call: (275) [system] atom(1424)
   Fail: (275) [system] atom(1424)
^  Fail: (274) [user] symbol(1424)
^  Redo: (273) [user] mfix_vars1(1424, _119120)
   Call: (274) [system] 1424=_119120
   Exit: (274) [system] 1424=1424
^  Exit: (273) [user] mfix_vars1(1424, 1424)
   Call: (273) [apply] apply:maplist_([0], _119122, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_153446|_153448], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _153446)
^  Unify: (274) [user] mfix_vars1(0, _153446)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _153446)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_158092))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _153446)
^  Unify: (274) [user] mfix_vars1(0, _153446)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _153446)
^  Unify: (274) [user] mfix_vars1(0, _153446)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _153446)
^  Unify: (274) [user] mfix_vars1(0, _153446)
   Call: (275) [system] 0==[_167372, _167378]
^  Redo: (274) [user] mfix_vars1(0, _153446)
^  Unify: (274) [user] mfix_vars1(0, _153446)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _153446)
^  Unify: (274) [user] mfix_vars1(0, _153446)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _153446)
^  Unify: (274) [user] mfix_vars1(0, _153446)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _153446)
^  Unify: (274) [user] mfix_vars1(0, _153446)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _153446)
   Call: (275) [system] 0=_153446
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _153448, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1424, 0], [1424, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1424, 0], [";; Converted:", 1424, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1424, 0], [";; Converted:", 1424, 0])
   Call: (270) [system] compound_name_arguments(_47620, '$COMMENT', [";; Converted:", 1424, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1424, 0), '$COMMENT', [";; Converted:", 1424, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1424, 0)\=@='$COMMENT'(";; Converted:", 1424, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1424, 0), _42034)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1424, 0), _203620))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1424, 0), _203620))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1424, 0), _203620))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1424, 0), _203620))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1424, 0), _203620)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1424, 0), _203620)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1424, 0), _209206))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1424, 0), _209206))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1424, 0), _209206)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1424, 0), _209206)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1424, 0), _209206)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1424, 0)\=@='$COMMENT'(";; Converted:", 1424, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1424, 0), _203620)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1424, 0), _36422))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1424, 0), _36422))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1424, 0), _36422))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1424, 0), _36422))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1424, 0), _36422)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1424, 0), _36422)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1424, 0), _231526))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1424, 0), _231526))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1424, 0), _231526)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1424, 0), _231526)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1424, 0), _231526)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1424, 0)\=@='$COMMENT'(";; Converted:", 1424, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1424, 0), _36422)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1424, 0)\=@='$COMMENT'(";; Converted:", 1424, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1424, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1424, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1424, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1424, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1424, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1424, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1424, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1424, 0), _260304, [], _260306)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1424, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1424, 0), _260304, [], _260306)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1424, 0), _260304, [], _260306)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1424, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1424, 0), _260304, [], _260306)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1424, 0), _260304, [], _260306)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1424, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1424, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1424, 0), _269620, _269622)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1424, 0), '$COMMENT', [";; Converted:", 1424, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1424, 0], _271506, [], _260306)
^  Unify: (258) [user] subst_vars([";; Converted:", 1424, 0], [";; Converted:", 1424, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1424, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1424, 0], _271506, [], _260306)
^  Unify: (258) [user] subst_vars([";; Converted:", 1424, 0], [_275242|_275244], [], _260306)
^  Call: (259) [user] subst_vars(";; Converted:", _275242, [], _276182)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _275242, [], _276182)
^  Unify: (259) [user] subst_vars(";; Converted:", _275242, [], _276182)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _275242, [], _276182)
^  Unify: (259) [user] subst_vars(";; Converted:", _275242, [], _276182)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _275242, [], _276182)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1424, 0], _275244, [], _260306)
^  Unify: (259) [user] subst_vars([1424, 0], [1424, 0], [], [])
   Call: (260) [system] var([1424, 0])
^  Redo: (259) [user] subst_vars([1424, 0], _275244, [], _260306)
^  Unify: (259) [user] subst_vars([1424, 0], [_291114|_291116], [], _260306)
^  Call: (260) [user] subst_vars(1424, _291114, [], _292054)
^  Unify: (260) [user] subst_vars(1424, 1424, [], [])
   Call: (261) [system] var(1424)
^  Redo: (260) [user] subst_vars(1424, _291114, [], _292054)
^  Unify: (260) [user] subst_vars(1424, _291114, [], _292054)
   Call: (261) [system] atom(1424)
^  Redo: (260) [user] subst_vars(1424, _291114, [], _292054)
^  Unify: (260) [user] subst_vars(1424, _291114, [], _292054)
   Call: (261) [system] compound(1424)
^  Redo: (260) [user] subst_vars(1424, _291114, [], _292054)
^  Unify: (260) [user] subst_vars(1424, 1424, [], [])
^  Exit: (260) [user] subst_vars(1424, 1424, [], [])
^  Call: (260) [user] subst_vars([0], _291116, [], _260306)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _291116, [], _260306)
^  Unify: (260) [user] subst_vars([0], [_306986|_306988], [], _260306)
^  Call: (261) [user] subst_vars(0, _306986, [], _307926)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _306986, [], _307926)
^  Unify: (261) [user] subst_vars(0, _306986, [], _307926)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _306986, [], _307926)
^  Unify: (261) [user] subst_vars(0, _306986, [], _307926)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _306986, [], _307926)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _306988, [], _260306)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _306988, [], _260306)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1424, 0], [1424, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1424, 0], [";; Converted:", 1424, 0], [], [])
   Call: (258) [system] compound_name_arguments(_260304, '$COMMENT', [";; Converted:", 1424, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1424, 0), '$COMMENT', [";; Converted:", 1424, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1424, 0), '$COMMENT'(";; Converted:", 1424, 0), [], [])
   Call: (257) [system] _330344=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1424, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1424, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1424, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1424, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1424, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1424, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1424, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1424, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1424, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1430, 0, 51191, '$COMMENT'(";; Original:", 1430, 0), '$stream_position'(51191, 1430, 0, 51225)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1430, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1430, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1430, 0), _383062))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1430, 0), _383062))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1430, 0), _383062)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1430, 0), _383062)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1430, 0), _383062)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1430, 0), _383062)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1430, 0), _388674))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1430, 0), _388674))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1430, 0), _388674))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1430, 0), _388674))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1430, 0), _388674)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1430, 0), _388674)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1430, 0), _394260))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1430, 0), _394260))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1430, 0), _394260)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1430, 0), _394260)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1430, 0), _394260)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1430, 0), _394260)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1430, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1430, 0), _394260)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1430, 0), '$VAR'(_401720))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1430, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1430, 0), _394260)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1430, 0), _394260)
   Call: (270) [system] '$COMMENT'(";; Original:", 1430, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1430, 0), _394260)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1430, 0), _394260)
   Call: (270) [system] '$COMMENT'(";; Original:", 1430, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1430, 0), _394260)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1430, 0), _394260)
   Call: (270) [system] '$COMMENT'(";; Original:", 1430, 0)==[_411000, _411006]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1430, 0), _394260)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1430, 0), _394260)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1430, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1430, 0), _394260)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1430, 0), _394260)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1430, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1430, 0), _394260)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1430, 0), _394260)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1430, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1430, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1430, 0), _421202, _421204)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1430, 0), '$COMMENT', [";; Original:", 1430, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1430, 0], _424944)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1430, 0], _424944)
   Call: (271) [apply] apply:maplist_([";; Original:", 1430, 0], _424944, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1430, 0], [_427762|_427764], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _427762)
^  Unify: (272) [user] mfix_vars1(";; Original:", _427762)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _427762)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_432408))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _427762)
^  Unify: (272) [user] mfix_vars1(";; Original:", _427762)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _427762)
^  Unify: (272) [user] mfix_vars1(";; Original:", _427762)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _427762)
^  Unify: (272) [user] mfix_vars1(";; Original:", _427762)
   Call: (273) [system] ";; Original:"==[_441688, _441694]
^  Redo: (272) [user] mfix_vars1(";; Original:", _427762)
^  Unify: (272) [user] mfix_vars1(";; Original:", _427762)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _427762)
^  Unify: (272) [user] mfix_vars1(";; Original:", _427762)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _427762)
^  Unify: (272) [user] mfix_vars1(";; Original:", _427762)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _427762)
^  Unify: (272) [user] mfix_vars1(";; Original:", _427762)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _427762)
   Call: (273) [system] ";; Original:"=_427762
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1430, 0], _427764, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1430, 0], [_465760|_465762], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1430, _465760)
^  Unify: (273) [user] mfix_vars1(1430, _465760)
   Call: (274) [system] var(1430)
^  Redo: (273) [user] mfix_vars1(1430, _465760)
^  Unify: (273) [user] mfix_vars1(1430, '$VAR'(_470406))
   Call: (274) [system] atom(1430)
^  Redo: (273) [user] mfix_vars1(1430, _465760)
^  Unify: (273) [user] mfix_vars1(1430, _465760)
   Call: (274) [system] 1430==true
^  Redo: (273) [user] mfix_vars1(1430, _465760)
^  Unify: (273) [user] mfix_vars1(1430, _465760)
   Call: (274) [system] 1430==false
^  Redo: (273) [user] mfix_vars1(1430, _465760)
^  Unify: (273) [user] mfix_vars1(1430, _465760)
   Call: (274) [system] 1430==[_479686, _479692]
^  Redo: (273) [user] mfix_vars1(1430, _465760)
^  Unify: (273) [user] mfix_vars1(1430, _465760)
   Call: (274) [system] is_list(1430)
^  Redo: (273) [user] mfix_vars1(1430, _465760)
^  Unify: (273) [user] mfix_vars1(1430, _465760)
   Call: (274) [system] string(1430)
^  Redo: (273) [user] mfix_vars1(1430, _465760)
^  Unify: (273) [user] mfix_vars1(1430, _465760)
   Call: (274) [system] compound(1430)
^  Redo: (273) [user] mfix_vars1(1430, _465760)
^  Unify: (273) [user] mfix_vars1(1430, _465760)
^  Call: (274) [user] symbol(1430)
^  Unify: (274) [user] symbol(1430)
   Call: (275) [system] atom(1430)
   Fail: (275) [system] atom(1430)
^  Fail: (274) [user] symbol(1430)
^  Redo: (273) [user] mfix_vars1(1430, _465760)
   Call: (274) [system] 1430=_465760
   Exit: (274) [system] 1430=1430
^  Exit: (273) [user] mfix_vars1(1430, 1430)
   Call: (273) [apply] apply:maplist_([0], _465762, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_500086|_500088], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _500086)
^  Unify: (274) [user] mfix_vars1(0, _500086)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _500086)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_504732))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _500086)
^  Unify: (274) [user] mfix_vars1(0, _500086)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _500086)
^  Unify: (274) [user] mfix_vars1(0, _500086)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _500086)
^  Unify: (274) [user] mfix_vars1(0, _500086)
   Call: (275) [system] 0==[_514012, _514018]
^  Redo: (274) [user] mfix_vars1(0, _500086)
^  Unify: (274) [user] mfix_vars1(0, _500086)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _500086)
^  Unify: (274) [user] mfix_vars1(0, _500086)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _500086)
^  Unify: (274) [user] mfix_vars1(0, _500086)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _500086)
^  Unify: (274) [user] mfix_vars1(0, _6036)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6036)
   Call: (275) [system] 0=_6036
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6038, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1430, 0], [1430, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1430, 0], [";; Original:", 1430, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1430, 0], [";; Original:", 1430, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";; Original:", 1430, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1430, 0), '$COMMENT', [";; Original:", 1430, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1430, 0)\=@='$COMMENT'(";; Original:", 1430, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1430, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1430, 0), _32084))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1430, 0), _32084))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1430, 0), _32084))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1430, 0), _32084))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1430, 0), _32084)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1430, 0), _32084)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1430, 0), _37670))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1430, 0), _37670))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1430, 0), _37670)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1430, 0), _37670)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1430, 0), _37670)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1430, 0)\=@='$COMMENT'(";; Original:", 1430, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1430, 0), _32084)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1430, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1430, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1430, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1430, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1430, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1430, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1430, 0), _59990))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1430, 0), _59990))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1430, 0), _59990)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1430, 0), _59990)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1430, 0), _59990)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1430, 0)\=@='$COMMENT'(";; Original:", 1430, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1430, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1430, 0)\=@='$COMMENT'(";; Original:", 1430, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1430, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1430, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1430, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1430, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1430, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1430, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1430, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1430, 0), _88768, [], _88770)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1430, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1430, 0), _88768, [], _88770)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1430, 0), _88768, [], _88770)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1430, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1430, 0), _88768, [], _88770)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1430, 0), _88768, [], _88770)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1430, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1430, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1430, 0), _98084, _98086)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1430, 0), '$COMMENT', [";; Original:", 1430, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1430, 0], _99970, [], _88770)
^  Unify: (258) [user] subst_vars([";; Original:", 1430, 0], [";; Original:", 1430, 0], [], [])
   Call: (259) [system] var([";; Original:", 1430, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1430, 0], _99970, [], _88770)
^  Unify: (258) [user] subst_vars([";; Original:", 1430, 0], [_103706|_103708], [], _88770)
^  Call: (259) [user] subst_vars(";; Original:", _103706, [], _104646)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _103706, [], _104646)
^  Unify: (259) [user] subst_vars(";; Original:", _103706, [], _104646)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _103706, [], _104646)
^  Unify: (259) [user] subst_vars(";; Original:", _103706, [], _104646)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _103706, [], _104646)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1430, 0], _103708, [], _88770)
^  Unify: (259) [user] subst_vars([1430, 0], [1430, 0], [], [])
   Call: (260) [system] var([1430, 0])
^  Redo: (259) [user] subst_vars([1430, 0], _103708, [], _88770)
^  Unify: (259) [user] subst_vars([1430, 0], [_119578|_119580], [], _88770)
^  Call: (260) [user] subst_vars(1430, _119578, [], _120518)
^  Unify: (260) [user] subst_vars(1430, 1430, [], [])
   Call: (261) [system] var(1430)
^  Redo: (260) [user] subst_vars(1430, _119578, [], _120518)
^  Unify: (260) [user] subst_vars(1430, _119578, [], _120518)
   Call: (261) [system] atom(1430)
^  Redo: (260) [user] subst_vars(1430, _119578, [], _120518)
^  Unify: (260) [user] subst_vars(1430, _119578, [], _120518)
   Call: (261) [system] compound(1430)
^  Redo: (260) [user] subst_vars(1430, _119578, [], _120518)
^  Unify: (260) [user] subst_vars(1430, 1430, [], [])
^  Exit: (260) [user] subst_vars(1430, 1430, [], [])
^  Call: (260) [user] subst_vars([0], _119580, [], _88770)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _119580, [], _88770)
^  Unify: (260) [user] subst_vars([0], [_135450|_135452], [], _88770)
^  Call: (261) [user] subst_vars(0, _135450, [], _136390)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _135450, [], _136390)
^  Unify: (261) [user] subst_vars(0, _135450, [], _136390)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _135450, [], _136390)
^  Unify: (261) [user] subst_vars(0, _135450, [], _136390)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _135450, [], _136390)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _135452, [], _88770)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _135452, [], _88770)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1430, 0], [1430, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1430, 0], [";; Original:", 1430, 0], [], [])
   Call: (258) [system] compound_name_arguments(_88768, '$COMMENT', [";; Original:", 1430, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1430, 0), '$COMMENT', [";; Original:", 1430, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1430, 0), '$COMMENT'(";; Original:", 1430, 0), [], [])
   Call: (257) [system] _158808=metta_file_buffer(+, '$COMMENT'(";; Original:", 1430, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1430, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1430, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1430, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1430, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1430, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1430, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1430, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1430, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1431, 0, 51204, '$COMMENT'(";;    #[test]", 1431, 0), '$stream_position'(51204, 1431, 0, 51238)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1431, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1431, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1431, 0), _211526))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1431, 0), _211526))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1431, 0), _211526)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1431, 0), _211526)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1431, 0), _211526)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1431, 0), _211526)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1431, 0), _217138))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1431, 0), _217138))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1431, 0), _217138))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1431, 0), _217138))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1431, 0), _217138)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1431, 0), _217138)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    #[test]", 1431, 0), _222724))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1431, 0), _222724))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    #[test]", 1431, 0), _222724)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1431, 0), _222724)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1431, 0), _222724)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1431, 0), _222724)
   Call: (270) [system] var('$COMMENT'(";;    #[test]", 1431, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1431, 0), _222724)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1431, 0), '$VAR'(_230184))
   Call: (270) [system] atom('$COMMENT'(";;    #[test]", 1431, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1431, 0), _222724)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1431, 0), _222724)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1431, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1431, 0), _222724)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1431, 0), _222724)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1431, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1431, 0), _222724)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1431, 0), _222724)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1431, 0)==[_239464, _239470]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1431, 0), _222724)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1431, 0), _222724)
   Call: (270) [system] is_list('$COMMENT'(";;    #[test]", 1431, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1431, 0), _222724)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1431, 0), _222724)
   Call: (270) [system] string('$COMMENT'(";;    #[test]", 1431, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1431, 0), _222724)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1431, 0), _222724)
   Call: (270) [system] compound('$COMMENT'(";;    #[test]", 1431, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    #[test]", 1431, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1431, 0), _249666, _249668)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT', [";;    #[test]", 1431, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    #[test]", 1431, 0], _253408)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1431, 0], _253408)
   Call: (271) [apply] apply:maplist_([";;    #[test]", 1431, 0], _253408, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    #[test]", 1431, 0], [_256226|_256228], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    #[test]", _256226)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _256226)
   Call: (273) [system] var(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _256226)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", '$VAR'(_260872))
   Call: (273) [system] atom(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _256226)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _256226)
   Call: (273) [system] ";;    #[test]"==true
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _256226)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _256226)
   Call: (273) [system] ";;    #[test]"==false
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _256226)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _256226)
   Call: (273) [system] ";;    #[test]"==[_270152, _270158]
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _256226)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _256226)
   Call: (273) [system] is_list(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _256226)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _256226)
   Call: (273) [system] string(";;    #[test]")
   Exit: (273) [system] string(";;    #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _256226)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _256226)
   Call: (273) [system] compound(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _256226)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _256226)
^  Call: (273) [user] symbol(";;    #[test]")
^  Unify: (273) [user] symbol(";;    #[test]")
   Call: (274) [system] atom(";;    #[test]")
   Fail: (274) [system] atom(";;    #[test]")
^  Fail: (273) [user] symbol(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _256226)
   Call: (273) [system] ";;    #[test]"=_256226
   Exit: (273) [system] ";;    #[test]"=";;    #[test]"
^  Exit: (272) [user] mfix_vars1(";;    #[test]", ";;    #[test]")
   Call: (272) [apply] apply:maplist_([1431, 0], _256228, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1431, 0], [_294224|_294226], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1431, _294224)
^  Unify: (273) [user] mfix_vars1(1431, _294224)
   Call: (274) [system] var(1431)
^  Redo: (273) [user] mfix_vars1(1431, _294224)
^  Unify: (273) [user] mfix_vars1(1431, '$VAR'(_298870))
   Call: (274) [system] atom(1431)
^  Redo: (273) [user] mfix_vars1(1431, _294224)
^  Unify: (273) [user] mfix_vars1(1431, _294224)
   Call: (274) [system] 1431==true
^  Redo: (273) [user] mfix_vars1(1431, _294224)
^  Unify: (273) [user] mfix_vars1(1431, _294224)
   Call: (274) [system] 1431==false
^  Redo: (273) [user] mfix_vars1(1431, _294224)
^  Unify: (273) [user] mfix_vars1(1431, _294224)
   Call: (274) [system] 1431==[_308150, _308156]
^  Redo: (273) [user] mfix_vars1(1431, _294224)
^  Unify: (273) [user] mfix_vars1(1431, _294224)
   Call: (274) [system] is_list(1431)
^  Redo: (273) [user] mfix_vars1(1431, _294224)
^  Unify: (273) [user] mfix_vars1(1431, _294224)
   Call: (274) [system] string(1431)
^  Redo: (273) [user] mfix_vars1(1431, _294224)
^  Unify: (273) [user] mfix_vars1(1431, _294224)
   Call: (274) [system] compound(1431)
^  Redo: (273) [user] mfix_vars1(1431, _294224)
^  Unify: (273) [user] mfix_vars1(1431, _294224)
^  Call: (274) [user] symbol(1431)
^  Unify: (274) [user] symbol(1431)
   Call: (275) [system] atom(1431)
   Fail: (275) [system] atom(1431)
^  Fail: (274) [user] symbol(1431)
^  Redo: (273) [user] mfix_vars1(1431, _294224)
   Call: (274) [system] 1431=_294224
   Exit: (274) [system] 1431=1431
^  Exit: (273) [user] mfix_vars1(1431, 1431)
   Call: (273) [apply] apply:maplist_([0], _294226, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_328550|_328552], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _328550)
^  Unify: (274) [user] mfix_vars1(0, _328550)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _328550)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_333196))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _328550)
^  Unify: (274) [user] mfix_vars1(0, _328550)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _328550)
^  Unify: (274) [user] mfix_vars1(0, _328550)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _328550)
^  Unify: (274) [user] mfix_vars1(0, _328550)
   Call: (275) [system] 0==[_342476, _342482]
^  Redo: (274) [user] mfix_vars1(0, _328550)
^  Unify: (274) [user] mfix_vars1(0, _328550)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _328550)
^  Unify: (274) [user] mfix_vars1(0, _328550)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _328550)
^  Unify: (274) [user] mfix_vars1(0, _328550)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _328550)
^  Unify: (274) [user] mfix_vars1(0, _328550)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _328550)
   Call: (275) [system] 0=_328550
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _328552, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1431, 0], [1431, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    #[test]", 1431, 0], [";;    #[test]", 1431, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1431, 0], [";;    #[test]", 1431, 0])
   Call: (270) [system] compound_name_arguments(_222724, '$COMMENT', [";;    #[test]", 1431, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT', [";;    #[test]", 1431, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1431, 0)\=@='$COMMENT'(";;    #[test]", 1431, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1431, 0), _217138)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    #[test]", 1431, 0), _378724))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1431, 0), _378724))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1431, 0), _378724))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1431, 0), _378724))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1431, 0), _378724)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1431, 0), _378724)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    #[test]", 1431, 0), _384310))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1431, 0), _384310))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    #[test]", 1431, 0), _384310)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1431, 0), _384310)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1431, 0), _384310)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1431, 0)\=@='$COMMENT'(";;    #[test]", 1431, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1431, 0), _378724)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    #[test]", 1431, 0), _211526))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1431, 0), _211526))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1431, 0), _211526))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1431, 0), _211526))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1431, 0), _211526)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1431, 0), _211526)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    #[test]", 1431, 0), _406630))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1431, 0), _406630))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    #[test]", 1431, 0), _406630)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1431, 0), _406630)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1431, 0), _406630)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1431, 0)\=@='$COMMENT'(";;    #[test]", 1431, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1431, 0), _211526)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0)))
   Call: (261) [system] '$COMMENT'(";;    #[test]", 1431, 0)\=@='$COMMENT'(";;    #[test]", 1431, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1431, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1431, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1431, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1431, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1431, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1431, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1431, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1431, 0), _435408, [], _435410)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    #[test]", 1431, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1431, 0), _435408, [], _435410)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1431, 0), _435408, [], _435410)
   Call: (258) [system] atom('$COMMENT'(";;    #[test]", 1431, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1431, 0), _435408, [], _435410)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1431, 0), _435408, [], _435410)
   Call: (258) [system] compound('$COMMENT'(";;    #[test]", 1431, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    #[test]", 1431, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1431, 0), _444724, _444726)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT', [";;    #[test]", 1431, 0])
^  Call: (258) [user] subst_vars([";;    #[test]", 1431, 0], _446610, [], _435410)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1431, 0], [";;    #[test]", 1431, 0], [], [])
   Call: (259) [system] var([";;    #[test]", 1431, 0])
^  Redo: (258) [user] subst_vars([";;    #[test]", 1431, 0], _446610, [], _435410)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1431, 0], [_450346|_450348], [], _435410)
^  Call: (259) [user] subst_vars(";;    #[test]", _450346, [], _451286)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
   Call: (260) [system] var(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _450346, [], _451286)
^  Unify: (259) [user] subst_vars(";;    #[test]", _450346, [], _451286)
   Call: (260) [system] atom(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _450346, [], _451286)
^  Unify: (259) [user] subst_vars(";;    #[test]", _450346, [], _451286)
   Call: (260) [system] compound(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _450346, [], _451286)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Exit: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Call: (259) [user] subst_vars([1431, 0], _450348, [], _435410)
^  Unify: (259) [user] subst_vars([1431, 0], [1431, 0], [], [])
   Call: (260) [system] var([1431, 0])
^  Redo: (259) [user] subst_vars([1431, 0], _450348, [], _435410)
^  Unify: (259) [user] subst_vars([1431, 0], [_466218|_466220], [], _435410)
^  Call: (260) [user] subst_vars(1431, _466218, [], _467158)
^  Unify: (260) [user] subst_vars(1431, 1431, [], [])
   Call: (261) [system] var(1431)
^  Redo: (260) [user] subst_vars(1431, _466218, [], _467158)
^  Unify: (260) [user] subst_vars(1431, _466218, [], _467158)
   Call: (261) [system] atom(1431)
^  Redo: (260) [user] subst_vars(1431, _466218, [], _467158)
^  Unify: (260) [user] subst_vars(1431, _466218, [], _467158)
   Call: (261) [system] compound(1431)
^  Redo: (260) [user] subst_vars(1431, _466218, [], _467158)
^  Unify: (260) [user] subst_vars(1431, 1431, [], [])
^  Exit: (260) [user] subst_vars(1431, 1431, [], [])
^  Call: (260) [user] subst_vars([0], _466220, [], _435410)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _466220, [], _435410)
^  Unify: (260) [user] subst_vars([0], [_482090|_482092], [], _435410)
^  Call: (261) [user] subst_vars(0, _482090, [], _483030)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _482090, [], _483030)
^  Unify: (261) [user] subst_vars(0, _482090, [], _483030)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _482090, [], _483030)
^  Unify: (261) [user] subst_vars(0, _482090, [], _483030)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _482090, [], _483030)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _482092, [], _435410)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _482092, [], _435410)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1431, 0], [1431, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    #[test]", 1431, 0], [";;    #[test]", 1431, 0], [], [])
   Call: (258) [system] compound_name_arguments(_435408, '$COMMENT', [";;    #[test]", 1431, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT', [";;    #[test]", 1431, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1431, 0), '$COMMENT'(";;    #[test]", 1431, 0), [], [])
   Call: (257) [system] _505448=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1431, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1431, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1431, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1431, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1431, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1431, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1431, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1431, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1431, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1432, 0, 51218, '$COMMENT'(";;    fn test_unify() {", 1432, 0), '$stream_position'(51218, 1432, 0, 51252)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _41254))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _41254))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _41254)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _41254)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    fn test_unify() {", 1432, 0), _41254)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    fn test_unify() {", 1432, 0), _41254)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _46866))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _46866))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _46866))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _46866))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _46866)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _46866)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _52452))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _52452))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _52452)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _52452)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_unify() {", 1432, 0), _52452)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_unify() {", 1432, 0), _52452)
   Call: (270) [system] var('$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_unify() {", 1432, 0), _52452)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_unify() {", 1432, 0), '$VAR'(_59912))
   Call: (270) [system] atom('$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_unify() {", 1432, 0), _52452)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_unify() {", 1432, 0), _52452)
   Call: (270) [system] '$COMMENT'(";;    fn test_unify() {", 1432, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_unify() {", 1432, 0), _52452)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_unify() {", 1432, 0), _52452)
   Call: (270) [system] '$COMMENT'(";;    fn test_unify() {", 1432, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_unify() {", 1432, 0), _52452)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_unify() {", 1432, 0), _52452)
   Call: (270) [system] '$COMMENT'(";;    fn test_unify() {", 1432, 0)==[_69192, _69198]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_unify() {", 1432, 0), _52452)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_unify() {", 1432, 0), _52452)
   Call: (270) [system] is_list('$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_unify() {", 1432, 0), _52452)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_unify() {", 1432, 0), _52452)
   Call: (270) [system] string('$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_unify() {", 1432, 0), _52452)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_unify() {", 1432, 0), _52452)
   Call: (270) [system] compound('$COMMENT'(";;    fn test_unify() {", 1432, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    fn test_unify() {", 1432, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    fn test_unify() {", 1432, 0), _79394, _79396)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT', [";;    fn test_unify() {", 1432, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    fn test_unify() {", 1432, 0], _83136)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn test_unify() {", 1432, 0], _83136)
   Call: (271) [apply] apply:maplist_([";;    fn test_unify() {", 1432, 0], _83136, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    fn test_unify() {", 1432, 0], [_85954|_85956], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    fn test_unify() {", _85954)
^  Unify: (272) [user] mfix_vars1(";;    fn test_unify() {", _85954)
   Call: (273) [system] var(";;    fn test_unify() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_unify() {", _85954)
^  Unify: (272) [user] mfix_vars1(";;    fn test_unify() {", '$VAR'(_90600))
   Call: (273) [system] atom(";;    fn test_unify() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_unify() {", _85954)
^  Unify: (272) [user] mfix_vars1(";;    fn test_unify() {", _85954)
   Call: (273) [system] ";;    fn test_unify() {"==true
^  Redo: (272) [user] mfix_vars1(";;    fn test_unify() {", _85954)
^  Unify: (272) [user] mfix_vars1(";;    fn test_unify() {", _85954)
   Call: (273) [system] ";;    fn test_unify() {"==false
^  Redo: (272) [user] mfix_vars1(";;    fn test_unify() {", _85954)
^  Unify: (272) [user] mfix_vars1(";;    fn test_unify() {", _85954)
   Call: (273) [system] ";;    fn test_unify() {"==[_99880, _99886]
^  Redo: (272) [user] mfix_vars1(";;    fn test_unify() {", _85954)
^  Unify: (272) [user] mfix_vars1(";;    fn test_unify() {", _85954)
   Call: (273) [system] is_list(";;    fn test_unify() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_unify() {", _85954)
^  Unify: (272) [user] mfix_vars1(";;    fn test_unify() {", _85954)
   Call: (273) [system] string(";;    fn test_unify() {")
   Exit: (273) [system] string(";;    fn test_unify() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    fn test_unify() {", _85954)
^  Unify: (272) [user] mfix_vars1(";;    fn test_unify() {", _85954)
   Call: (273) [system] compound(";;    fn test_unify() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_unify() {", _85954)
^  Unify: (272) [user] mfix_vars1(";;    fn test_unify() {", _85954)
^  Call: (273) [user] symbol(";;    fn test_unify() {")
^  Unify: (273) [user] symbol(";;    fn test_unify() {")
   Call: (274) [system] atom(";;    fn test_unify() {")
   Fail: (274) [system] atom(";;    fn test_unify() {")
^  Fail: (273) [user] symbol(";;    fn test_unify() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_unify() {", _85954)
   Call: (273) [system] ";;    fn test_unify() {"=_85954
   Exit: (273) [system] ";;    fn test_unify() {"=";;    fn test_unify() {"
^  Exit: (272) [user] mfix_vars1(";;    fn test_unify() {", ";;    fn test_unify() {")
   Call: (272) [apply] apply:maplist_([1432, 0], _85956, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1432, 0], [_123952|_123954], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1432, _123952)
^  Unify: (273) [user] mfix_vars1(1432, _123952)
   Call: (274) [system] var(1432)
^  Redo: (273) [user] mfix_vars1(1432, _123952)
^  Unify: (273) [user] mfix_vars1(1432, '$VAR'(_128598))
   Call: (274) [system] atom(1432)
^  Redo: (273) [user] mfix_vars1(1432, _123952)
^  Unify: (273) [user] mfix_vars1(1432, _123952)
   Call: (274) [system] 1432==true
^  Redo: (273) [user] mfix_vars1(1432, _123952)
^  Unify: (273) [user] mfix_vars1(1432, _123952)
   Call: (274) [system] 1432==false
^  Redo: (273) [user] mfix_vars1(1432, _123952)
^  Unify: (273) [user] mfix_vars1(1432, _123952)
   Call: (274) [system] 1432==[_137878, _137884]
^  Redo: (273) [user] mfix_vars1(1432, _123952)
^  Unify: (273) [user] mfix_vars1(1432, _123952)
   Call: (274) [system] is_list(1432)
^  Redo: (273) [user] mfix_vars1(1432, _123952)
^  Unify: (273) [user] mfix_vars1(1432, _123952)
   Call: (274) [system] string(1432)
^  Redo: (273) [user] mfix_vars1(1432, _123952)
^  Unify: (273) [user] mfix_vars1(1432, _123952)
   Call: (274) [system] compound(1432)
^  Redo: (273) [user] mfix_vars1(1432, _123952)
^  Unify: (273) [user] mfix_vars1(1432, _123952)
^  Call: (274) [user] symbol(1432)
^  Unify: (274) [user] symbol(1432)
   Call: (275) [system] atom(1432)
   Fail: (275) [system] atom(1432)
^  Fail: (274) [user] symbol(1432)
^  Redo: (273) [user] mfix_vars1(1432, _123952)
   Call: (274) [system] 1432=_123952
   Exit: (274) [system] 1432=1432
^  Exit: (273) [user] mfix_vars1(1432, 1432)
   Call: (273) [apply] apply:maplist_([0], _123954, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_158278|_158280], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _158278)
^  Unify: (274) [user] mfix_vars1(0, _158278)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _158278)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_162924))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _158278)
^  Unify: (274) [user] mfix_vars1(0, _158278)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _158278)
^  Unify: (274) [user] mfix_vars1(0, _158278)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _158278)
^  Unify: (274) [user] mfix_vars1(0, _158278)
   Call: (275) [system] 0==[_172204, _172210]
^  Redo: (274) [user] mfix_vars1(0, _158278)
^  Unify: (274) [user] mfix_vars1(0, _158278)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _158278)
^  Unify: (274) [user] mfix_vars1(0, _158278)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _158278)
^  Unify: (274) [user] mfix_vars1(0, _158278)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _158278)
^  Unify: (274) [user] mfix_vars1(0, _158278)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _158278)
   Call: (275) [system] 0=_158278
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _158280, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1432, 0], [1432, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    fn test_unify() {", 1432, 0], [";;    fn test_unify() {", 1432, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn test_unify() {", 1432, 0], [";;    fn test_unify() {", 1432, 0])
   Call: (270) [system] compound_name_arguments(_52452, '$COMMENT', [";;    fn test_unify() {", 1432, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT', [";;    fn test_unify() {", 1432, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn test_unify() {", 1432, 0)\=@='$COMMENT'(";;    fn test_unify() {", 1432, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _46866)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _208452))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _208452))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _208452))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _208452))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _208452)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _208452)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _214038))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _214038))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _214038)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _214038)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    fn test_unify() {", 1432, 0), _214038)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn test_unify() {", 1432, 0)\=@='$COMMENT'(";;    fn test_unify() {", 1432, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _208452)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _41254))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _41254))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _41254))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _41254))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _41254)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _41254)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _236358))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _236358))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _236358)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _236358)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    fn test_unify() {", 1432, 0), _236358)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn test_unify() {", 1432, 0)\=@='$COMMENT'(";;    fn test_unify() {", 1432, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _41254)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0)))
   Call: (261) [system] '$COMMENT'(";;    fn test_unify() {", 1432, 0)\=@='$COMMENT'(";;    fn test_unify() {", 1432, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_unify() {", 1432, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    fn test_unify() {", 1432, 0), _265136, [], _265138)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn test_unify() {", 1432, 0), _265136, [], _265138)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn test_unify() {", 1432, 0), _265136, [], _265138)
   Call: (258) [system] atom('$COMMENT'(";;    fn test_unify() {", 1432, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn test_unify() {", 1432, 0), _265136, [], _265138)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn test_unify() {", 1432, 0), _265136, [], _265138)
   Call: (258) [system] compound('$COMMENT'(";;    fn test_unify() {", 1432, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    fn test_unify() {", 1432, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    fn test_unify() {", 1432, 0), _274452, _274454)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT', [";;    fn test_unify() {", 1432, 0])
^  Call: (258) [user] subst_vars([";;    fn test_unify() {", 1432, 0], _276338, [], _265138)
^  Unify: (258) [user] subst_vars([";;    fn test_unify() {", 1432, 0], [";;    fn test_unify() {", 1432, 0], [], [])
   Call: (259) [system] var([";;    fn test_unify() {", 1432, 0])
^  Redo: (258) [user] subst_vars([";;    fn test_unify() {", 1432, 0], _276338, [], _265138)
^  Unify: (258) [user] subst_vars([";;    fn test_unify() {", 1432, 0], [_280074|_280076], [], _265138)
^  Call: (259) [user] subst_vars(";;    fn test_unify() {", _280074, [], _281014)
^  Unify: (259) [user] subst_vars(";;    fn test_unify() {", ";;    fn test_unify() {", [], [])
   Call: (260) [system] var(";;    fn test_unify() {")
^  Redo: (259) [user] subst_vars(";;    fn test_unify() {", _280074, [], _281014)
^  Unify: (259) [user] subst_vars(";;    fn test_unify() {", _280074, [], _281014)
   Call: (260) [system] atom(";;    fn test_unify() {")
^  Redo: (259) [user] subst_vars(";;    fn test_unify() {", _280074, [], _281014)
^  Unify: (259) [user] subst_vars(";;    fn test_unify() {", _280074, [], _281014)
   Call: (260) [system] compound(";;    fn test_unify() {")
^  Redo: (259) [user] subst_vars(";;    fn test_unify() {", _280074, [], _281014)
^  Unify: (259) [user] subst_vars(";;    fn test_unify() {", ";;    fn test_unify() {", [], [])
^  Exit: (259) [user] subst_vars(";;    fn test_unify() {", ";;    fn test_unify() {", [], [])
^  Call: (259) [user] subst_vars([1432, 0], _280076, [], _265138)
^  Unify: (259) [user] subst_vars([1432, 0], [1432, 0], [], [])
   Call: (260) [system] var([1432, 0])
^  Redo: (259) [user] subst_vars([1432, 0], _280076, [], _265138)
^  Unify: (259) [user] subst_vars([1432, 0], [_295946|_295948], [], _265138)
^  Call: (260) [user] subst_vars(1432, _295946, [], _296886)
^  Unify: (260) [user] subst_vars(1432, 1432, [], [])
   Call: (261) [system] var(1432)
^  Redo: (260) [user] subst_vars(1432, _295946, [], _296886)
^  Unify: (260) [user] subst_vars(1432, _295946, [], _296886)
   Call: (261) [system] atom(1432)
^  Redo: (260) [user] subst_vars(1432, _295946, [], _296886)
^  Unify: (260) [user] subst_vars(1432, _295946, [], _296886)
   Call: (261) [system] compound(1432)
^  Redo: (260) [user] subst_vars(1432, _295946, [], _296886)
^  Unify: (260) [user] subst_vars(1432, 1432, [], [])
^  Exit: (260) [user] subst_vars(1432, 1432, [], [])
^  Call: (260) [user] subst_vars([0], _295948, [], _265138)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _295948, [], _265138)
^  Unify: (260) [user] subst_vars([0], [_311818|_311820], [], _265138)
^  Call: (261) [user] subst_vars(0, _311818, [], _312758)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _311818, [], _312758)
^  Unify: (261) [user] subst_vars(0, _311818, [], _312758)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _311818, [], _312758)
^  Unify: (261) [user] subst_vars(0, _311818, [], _312758)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _311818, [], _312758)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _311820, [], _265138)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _311820, [], _265138)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1432, 0], [1432, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    fn test_unify() {", 1432, 0], [";;    fn test_unify() {", 1432, 0], [], [])
   Call: (258) [system] compound_name_arguments(_265136, '$COMMENT', [";;    fn test_unify() {", 1432, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT', [";;    fn test_unify() {", 1432, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    fn test_unify() {", 1432, 0), '$COMMENT'(";;    fn test_unify() {", 1432, 0), [], [])
   Call: (257) [system] _335176=metta_file_buffer(+, '$COMMENT'(";;    fn test_unify() {", 1432, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    fn test_unify() {", 1432, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    fn test_unify() {", 1432, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn test_unify() {", 1432, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn test_unify() {", 1432, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn test_unify() {", 1432, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn test_unify() {", 1432, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn test_unify() {", 1432, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn test_unify() {", 1432, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1433, 0, 51242, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$stream_position'(51242, 1433, 0, 51276)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _387908))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _387908))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _387908)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _387908)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _387908)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _387908)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _393520))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _393520))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _393520))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _393520))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _393520)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _393520)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _399106))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _399106))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _399106)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _399106)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _399106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _399106)
   Call: (270) [system] var('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _399106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$VAR'(_406566))
   Call: (270) [system] atom('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _399106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _399106)
   Call: (270) [system] '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _399106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _399106)
   Call: (270) [system] '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _399106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _399106)
   Call: (270) [system] '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0)==[_415846, _415852]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _399106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _399106)
   Call: (270) [system] is_list('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _399106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _399106)
   Call: (270) [system] string('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _399106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _399106)
   Call: (270) [system] compound('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _426048, _426050)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT', [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0], _429790)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0], _429790)
   Call: (271) [apply] apply:maplist_([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0], _429790, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0], [_432608|_432610], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _432608)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _432608)
   Call: (273) [system] var(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _432608)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", '$VAR'(_437254))
   Call: (273) [system] atom(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _432608)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _432608)
   Call: (273) [system] ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));"==true
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _432608)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _432608)
   Call: (273) [system] ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));"==false
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _432608)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _432608)
   Call: (273) [system] ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));"==[_446534, _446540]
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _432608)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _432608)
   Call: (273) [system] is_list(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _432608)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _432608)
   Call: (273) [system] string(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Exit: (273) [system] string(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _432608)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _432608)
   Call: (273) [system] compound(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _432608)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _432608)
^  Call: (273) [user] symbol(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Unify: (273) [user] symbol(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (274) [system] atom(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Fail: (274) [system] atom(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Fail: (273) [user] symbol(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _432608)
   Call: (273) [system] ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));"=_432608
   Exit: (273) [system] ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));"=";;        let metta = Metta::new(Some(EnvBuilder::test_env()));"
^  Exit: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (272) [apply] apply:maplist_([1433, 0], _432610, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1433, 0], [_470606|_470608], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1433, _470606)
^  Unify: (273) [user] mfix_vars1(1433, _470606)
   Call: (274) [system] var(1433)
^  Redo: (273) [user] mfix_vars1(1433, _470606)
^  Unify: (273) [user] mfix_vars1(1433, '$VAR'(_475252))
   Call: (274) [system] atom(1433)
^  Redo: (273) [user] mfix_vars1(1433, _470606)
^  Unify: (273) [user] mfix_vars1(1433, _470606)
   Call: (274) [system] 1433==true
^  Redo: (273) [user] mfix_vars1(1433, _470606)
^  Unify: (273) [user] mfix_vars1(1433, _470606)
   Call: (274) [system] 1433==false
^  Redo: (273) [user] mfix_vars1(1433, _470606)
^  Unify: (273) [user] mfix_vars1(1433, _470606)
   Call: (274) [system] 1433==[_484532, _484538]
^  Redo: (273) [user] mfix_vars1(1433, _470606)
^  Unify: (273) [user] mfix_vars1(1433, _470606)
   Call: (274) [system] is_list(1433)
^  Redo: (273) [user] mfix_vars1(1433, _470606)
^  Unify: (273) [user] mfix_vars1(1433, _470606)
   Call: (274) [system] string(1433)
^  Redo: (273) [user] mfix_vars1(1433, _470606)
^  Unify: (273) [user] mfix_vars1(1433, _470606)
   Call: (274) [system] compound(1433)
^  Redo: (273) [user] mfix_vars1(1433, _470606)
^  Unify: (273) [user] mfix_vars1(1433, _470606)
^  Call: (274) [user] symbol(1433)
^  Unify: (274) [user] symbol(1433)
   Call: (275) [system] atom(1433)
   Fail: (275) [system] atom(1433)
^  Fail: (274) [user] symbol(1433)
^  Redo: (273) [user] mfix_vars1(1433, _470606)
   Call: (274) [system] 1433=_470606
   Exit: (274) [system] 1433=1433
^  Exit: (273) [user] mfix_vars1(1433, 1433)
   Call: (273) [apply] apply:maplist_([0], _470608, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_504932|_504934], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _504932)
^  Unify: (274) [user] mfix_vars1(0, _504932)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _504932)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_509578))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _504932)
^  Unify: (274) [user] mfix_vars1(0, _504932)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _504932)
^  Unify: (274) [user] mfix_vars1(0, _504932)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _504932)
^  Unify: (274) [user] mfix_vars1(0, _504932)
   Call: (275) [system] 0==[_518858, _518864]
^  Redo: (274) [user] mfix_vars1(0, _504932)
^  Unify: (274) [user] mfix_vars1(0, _504932)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _504932)
^  Unify: (274) [user] mfix_vars1(0, _6050)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _6050)
^  Unify: (274) [user] mfix_vars1(0, _6050)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _6050)
^  Unify: (274) [user] mfix_vars1(0, _6050)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6050)
   Call: (275) [system] 0=_6050
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6052, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1433, 0], [1433, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0], [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0], [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0])
   Call: (270) [system] compound_name_arguments(_5992, '$COMMENT', [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT', [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0)))
   Call: (267) [system] '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0)\=@='$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _5978)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _37256))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _37256))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _37256))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _37256))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _37256)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _37256)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _42842))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _42842))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _42842)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _42842)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _42842)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0)))
   Call: (267) [system] '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0)\=@='$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _37256)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _5958))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _5958))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _5958))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _5958))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _5958)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _5958)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _65162))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _65162))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _65162)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _65162)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _65162)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0)))
   Call: (267) [system] '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0)\=@='$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _5958)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0)))
   Call: (261) [system] '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0)\=@='$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _93940, [], _93942)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _93940, [], _93942)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _93940, [], _93942)
   Call: (258) [system] atom('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _93940, [], _93942)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _93940, [], _93942)
   Call: (258) [system] compound('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), _103256, _103258)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT', [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0])
^  Call: (258) [user] subst_vars([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0], _105142, [], _93942)
^  Unify: (258) [user] subst_vars([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0], [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0], [], [])
   Call: (259) [system] var([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0])
^  Redo: (258) [user] subst_vars([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0], _105142, [], _93942)
^  Unify: (258) [user] subst_vars([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0], [_108878|_108880], [], _93942)
^  Call: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _108878, [], _109818)
^  Unify: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
   Call: (260) [system] var(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _108878, [], _109818)
^  Unify: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _108878, [], _109818)
   Call: (260) [system] atom(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _108878, [], _109818)
^  Unify: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _108878, [], _109818)
   Call: (260) [system] compound(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _108878, [], _109818)
^  Unify: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Exit: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Call: (259) [user] subst_vars([1433, 0], _108880, [], _93942)
^  Unify: (259) [user] subst_vars([1433, 0], [1433, 0], [], [])
   Call: (260) [system] var([1433, 0])
^  Redo: (259) [user] subst_vars([1433, 0], _108880, [], _93942)
^  Unify: (259) [user] subst_vars([1433, 0], [_124750|_124752], [], _93942)
^  Call: (260) [user] subst_vars(1433, _124750, [], _125690)
^  Unify: (260) [user] subst_vars(1433, 1433, [], [])
   Call: (261) [system] var(1433)
^  Redo: (260) [user] subst_vars(1433, _124750, [], _125690)
^  Unify: (260) [user] subst_vars(1433, _124750, [], _125690)
   Call: (261) [system] atom(1433)
^  Redo: (260) [user] subst_vars(1433, _124750, [], _125690)
^  Unify: (260) [user] subst_vars(1433, _124750, [], _125690)
   Call: (261) [system] compound(1433)
^  Redo: (260) [user] subst_vars(1433, _124750, [], _125690)
^  Unify: (260) [user] subst_vars(1433, 1433, [], [])
^  Exit: (260) [user] subst_vars(1433, 1433, [], [])
^  Call: (260) [user] subst_vars([0], _124752, [], _93942)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _124752, [], _93942)
^  Unify: (260) [user] subst_vars([0], [_140622|_140624], [], _93942)
^  Call: (261) [user] subst_vars(0, _140622, [], _141562)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _140622, [], _141562)
^  Unify: (261) [user] subst_vars(0, _140622, [], _141562)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _140622, [], _141562)
^  Unify: (261) [user] subst_vars(0, _140622, [], _141562)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _140622, [], _141562)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _140624, [], _93942)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _140624, [], _93942)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1433, 0], [1433, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0], [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0], [], [])
   Call: (258) [system] compound_name_arguments(_93940, '$COMMENT', [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT', [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), [], [])
   Call: (257) [system] _163980=metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1433, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1434, 0, 51306, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$stream_position'(51306, 1434, 0, 51340)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _216706))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _216706))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _216706)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _216706)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _216706)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _216706)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _222318))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _222318))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _222318))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _222318))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _222318)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _222318)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _227904))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _227904))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _227904)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _227904)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _227904)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _227904)
   Call: (270) [system] var('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _227904)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$VAR'(_235364))
   Call: (270) [system] atom('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _227904)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _227904)
   Call: (270) [system] '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _227904)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _227904)
   Call: (270) [system] '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _227904)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _227904)
   Call: (270) [system] '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0)==[_244644, _244650]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _227904)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _227904)
   Call: (270) [system] is_list('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _227904)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _227904)
   Call: (270) [system] string('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _227904)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _227904)
   Call: (270) [system] compound('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _254846, _254848)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT', [";;        let parser = SExprParser::new(\"", 1434, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        let parser = SExprParser::new(\"", 1434, 0], _258588)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let parser = SExprParser::new(\"", 1434, 0], _258588)
   Call: (271) [apply] apply:maplist_([";;        let parser = SExprParser::new(\"", 1434, 0], _258588, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        let parser = SExprParser::new(\"", 1434, 0], [_261406|_261408], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _261406)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _261406)
   Call: (273) [system] var(";;        let parser = SExprParser::new(\"")
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _261406)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", '$VAR'(_266052))
   Call: (273) [system] atom(";;        let parser = SExprParser::new(\"")
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _261406)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _261406)
   Call: (273) [system] ";;        let parser = SExprParser::new(\""==true
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _261406)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _261406)
   Call: (273) [system] ";;        let parser = SExprParser::new(\""==false
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _261406)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _261406)
   Call: (273) [system] ";;        let parser = SExprParser::new(\""==[_275332, _275338]
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _261406)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _261406)
   Call: (273) [system] is_list(";;        let parser = SExprParser::new(\"")
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _261406)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _261406)
   Call: (273) [system] string(";;        let parser = SExprParser::new(\"")
   Exit: (273) [system] string(";;        let parser = SExprParser::new(\"")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _261406)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _261406)
   Call: (273) [system] compound(";;        let parser = SExprParser::new(\"")
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _261406)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _261406)
^  Call: (273) [user] symbol(";;        let parser = SExprParser::new(\"")
^  Unify: (273) [user] symbol(";;        let parser = SExprParser::new(\"")
   Call: (274) [system] atom(";;        let parser = SExprParser::new(\"")
   Fail: (274) [system] atom(";;        let parser = SExprParser::new(\"")
^  Fail: (273) [user] symbol(";;        let parser = SExprParser::new(\"")
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _261406)
   Call: (273) [system] ";;        let parser = SExprParser::new(\""=_261406
   Exit: (273) [system] ";;        let parser = SExprParser::new(\""=";;        let parser = SExprParser::new(\""
^  Exit: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", ";;        let parser = SExprParser::new(\"")
   Call: (272) [apply] apply:maplist_([1434, 0], _261408, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1434, 0], [_299404|_299406], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1434, _299404)
^  Unify: (273) [user] mfix_vars1(1434, _299404)
   Call: (274) [system] var(1434)
^  Redo: (273) [user] mfix_vars1(1434, _299404)
^  Unify: (273) [user] mfix_vars1(1434, '$VAR'(_304050))
   Call: (274) [system] atom(1434)
^  Redo: (273) [user] mfix_vars1(1434, _299404)
^  Unify: (273) [user] mfix_vars1(1434, _299404)
   Call: (274) [system] 1434==true
^  Redo: (273) [user] mfix_vars1(1434, _299404)
^  Unify: (273) [user] mfix_vars1(1434, _299404)
   Call: (274) [system] 1434==false
^  Redo: (273) [user] mfix_vars1(1434, _299404)
^  Unify: (273) [user] mfix_vars1(1434, _299404)
   Call: (274) [system] 1434==[_313330, _313336]
^  Redo: (273) [user] mfix_vars1(1434, _299404)
^  Unify: (273) [user] mfix_vars1(1434, _299404)
   Call: (274) [system] is_list(1434)
^  Redo: (273) [user] mfix_vars1(1434, _299404)
^  Unify: (273) [user] mfix_vars1(1434, _299404)
   Call: (274) [system] string(1434)
^  Redo: (273) [user] mfix_vars1(1434, _299404)
^  Unify: (273) [user] mfix_vars1(1434, _299404)
   Call: (274) [system] compound(1434)
^  Redo: (273) [user] mfix_vars1(1434, _299404)
^  Unify: (273) [user] mfix_vars1(1434, _299404)
^  Call: (274) [user] symbol(1434)
^  Unify: (274) [user] symbol(1434)
   Call: (275) [system] atom(1434)
   Fail: (275) [system] atom(1434)
^  Fail: (274) [user] symbol(1434)
^  Redo: (273) [user] mfix_vars1(1434, _299404)
   Call: (274) [system] 1434=_299404
   Exit: (274) [system] 1434=1434
^  Exit: (273) [user] mfix_vars1(1434, 1434)
   Call: (273) [apply] apply:maplist_([0], _299406, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_333730|_333732], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _333730)
^  Unify: (274) [user] mfix_vars1(0, _333730)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _333730)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_338376))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _333730)
^  Unify: (274) [user] mfix_vars1(0, _333730)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _333730)
^  Unify: (274) [user] mfix_vars1(0, _333730)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _333730)
^  Unify: (274) [user] mfix_vars1(0, _333730)
   Call: (275) [system] 0==[_347656, _347662]
^  Redo: (274) [user] mfix_vars1(0, _333730)
^  Unify: (274) [user] mfix_vars1(0, _333730)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _333730)
^  Unify: (274) [user] mfix_vars1(0, _333730)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _333730)
^  Unify: (274) [user] mfix_vars1(0, _333730)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _333730)
^  Unify: (274) [user] mfix_vars1(0, _333730)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _333730)
   Call: (275) [system] 0=_333730
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _333732, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1434, 0], [1434, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        let parser = SExprParser::new(\"", 1434, 0], [";;        let parser = SExprParser::new(\"", 1434, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let parser = SExprParser::new(\"", 1434, 0], [";;        let parser = SExprParser::new(\"", 1434, 0])
   Call: (270) [system] compound_name_arguments(_227904, '$COMMENT', [";;        let parser = SExprParser::new(\"", 1434, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT', [";;        let parser = SExprParser::new(\"", 1434, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0)))
   Call: (267) [system] '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0)\=@='$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _222318)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _383904))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _383904))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _383904))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _383904))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _383904)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _383904)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _389490))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _389490))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _389490)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _389490)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _389490)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0)))
   Call: (267) [system] '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0)\=@='$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _383904)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _216706))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _216706))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _216706))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _216706))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _216706)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _216706)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _411810))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _411810))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _411810)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _411810)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _411810)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0)))
   Call: (267) [system] '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0)\=@='$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _216706)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0)))
   Call: (261) [system] '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0)\=@='$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _440588, [], _440590)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _440588, [], _440590)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _440588, [], _440590)
   Call: (258) [system] atom('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _440588, [], _440590)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _440588, [], _440590)
   Call: (258) [system] compound('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), _449904, _449906)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT', [";;        let parser = SExprParser::new(\"", 1434, 0])
^  Call: (258) [user] subst_vars([";;        let parser = SExprParser::new(\"", 1434, 0], _451790, [], _440590)
^  Unify: (258) [user] subst_vars([";;        let parser = SExprParser::new(\"", 1434, 0], [";;        let parser = SExprParser::new(\"", 1434, 0], [], [])
   Call: (259) [system] var([";;        let parser = SExprParser::new(\"", 1434, 0])
^  Redo: (258) [user] subst_vars([";;        let parser = SExprParser::new(\"", 1434, 0], _451790, [], _440590)
^  Unify: (258) [user] subst_vars([";;        let parser = SExprParser::new(\"", 1434, 0], [_455526|_455528], [], _440590)
^  Call: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", _455526, [], _456466)
^  Unify: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", ";;        let parser = SExprParser::new(\"", [], [])
   Call: (260) [system] var(";;        let parser = SExprParser::new(\"")
^  Redo: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", _455526, [], _456466)
^  Unify: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", _455526, [], _456466)
   Call: (260) [system] atom(";;        let parser = SExprParser::new(\"")
^  Redo: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", _455526, [], _456466)
^  Unify: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", _455526, [], _456466)
   Call: (260) [system] compound(";;        let parser = SExprParser::new(\"")
^  Redo: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", _455526, [], _456466)
^  Unify: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", ";;        let parser = SExprParser::new(\"", [], [])
^  Exit: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", ";;        let parser = SExprParser::new(\"", [], [])
^  Call: (259) [user] subst_vars([1434, 0], _455528, [], _440590)
^  Unify: (259) [user] subst_vars([1434, 0], [1434, 0], [], [])
   Call: (260) [system] var([1434, 0])
^  Redo: (259) [user] subst_vars([1434, 0], _455528, [], _440590)
^  Unify: (259) [user] subst_vars([1434, 0], [_471398|_471400], [], _440590)
^  Call: (260) [user] subst_vars(1434, _471398, [], _472338)
^  Unify: (260) [user] subst_vars(1434, 1434, [], [])
   Call: (261) [system] var(1434)
^  Redo: (260) [user] subst_vars(1434, _471398, [], _472338)
^  Unify: (260) [user] subst_vars(1434, _471398, [], _472338)
   Call: (261) [system] atom(1434)
^  Redo: (260) [user] subst_vars(1434, _471398, [], _472338)
^  Unify: (260) [user] subst_vars(1434, _471398, [], _472338)
   Call: (261) [system] compound(1434)
^  Redo: (260) [user] subst_vars(1434, _471398, [], _472338)
^  Unify: (260) [user] subst_vars(1434, 1434, [], [])
^  Exit: (260) [user] subst_vars(1434, 1434, [], [])
^  Call: (260) [user] subst_vars([0], _471400, [], _440590)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _471400, [], _440590)
^  Unify: (260) [user] subst_vars([0], [_487270|_487272], [], _440590)
^  Call: (261) [user] subst_vars(0, _487270, [], _488210)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _487270, [], _488210)
^  Unify: (261) [user] subst_vars(0, _487270, [], _488210)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _487270, [], _488210)
^  Unify: (261) [user] subst_vars(0, _487270, [], _488210)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _487270, [], _488210)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _487272, [], _440590)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _487272, [], _440590)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1434, 0], [1434, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        let parser = SExprParser::new(\"", 1434, 0], [";;        let parser = SExprParser::new(\"", 1434, 0], [], [])
   Call: (258) [system] compound_name_arguments(_440588, '$COMMENT', [";;        let parser = SExprParser::new(\"", 1434, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT', [";;        let parser = SExprParser::new(\"", 1434, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), [], [])
   Call: (257) [system] _510628=metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1434, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1435, 0, 51348, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$stream_position'(51348, 1435, 0, 51382)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _46100))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _46100))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _46100)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _46100)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _46100)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _46100)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _51712))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _51712))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _51712))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _51712))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _51712)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _51712)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _57298))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _57298))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _57298)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _57298)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _57298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _57298)
   Call: (270) [system] var('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _57298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$VAR'(_64758))
   Call: (270) [system] atom('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _57298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _57298)
   Call: (270) [system] '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _57298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _57298)
   Call: (270) [system] '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _57298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _57298)
   Call: (270) [system] '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0)==[_74038, _74044]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _57298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _57298)
   Call: (270) [system] is_list('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _57298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _57298)
   Call: (270) [system] string('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _57298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _57298)
   Call: (270) [system] compound('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _84240, _84242)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT', [";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0], _87982)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0], _87982)
   Call: (271) [apply] apply:maplist_([";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0], _87982, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0], [_90800|_90802], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _90800)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _90800)
   Call: (273) [system] var(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _90800)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", '$VAR'(_95446))
   Call: (273) [system] atom(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _90800)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _90800)
   Call: (273) [system] ";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)"==true
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _90800)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _90800)
   Call: (273) [system] ";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)"==false
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _90800)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _90800)
   Call: (273) [system] ";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)"==[_104726, _104732]
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _90800)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _90800)
   Call: (273) [system] is_list(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _90800)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _90800)
   Call: (273) [system] string(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)")
   Exit: (273) [system] string(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _90800)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _90800)
   Call: (273) [system] compound(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _90800)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _90800)
^  Call: (273) [user] symbol(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)")
^  Unify: (273) [user] symbol(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)")
   Call: (274) [system] atom(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)")
   Fail: (274) [system] atom(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)")
^  Fail: (273) [user] symbol(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _90800)
   Call: (273) [system] ";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)"=_90800
   Exit: (273) [system] ";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)"=";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)"
^  Exit: (272) [user] mfix_vars1(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", ";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)")
   Call: (272) [apply] apply:maplist_([1435, 0], _90802, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1435, 0], [_128798|_128800], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1435, _128798)
^  Unify: (273) [user] mfix_vars1(1435, _128798)
   Call: (274) [system] var(1435)
^  Redo: (273) [user] mfix_vars1(1435, _128798)
^  Unify: (273) [user] mfix_vars1(1435, '$VAR'(_133444))
   Call: (274) [system] atom(1435)
^  Redo: (273) [user] mfix_vars1(1435, _128798)
^  Unify: (273) [user] mfix_vars1(1435, _128798)
   Call: (274) [system] 1435==true
^  Redo: (273) [user] mfix_vars1(1435, _128798)
^  Unify: (273) [user] mfix_vars1(1435, _128798)
   Call: (274) [system] 1435==false
^  Redo: (273) [user] mfix_vars1(1435, _128798)
^  Unify: (273) [user] mfix_vars1(1435, _128798)
   Call: (274) [system] 1435==[_142724, _142730]
^  Redo: (273) [user] mfix_vars1(1435, _128798)
^  Unify: (273) [user] mfix_vars1(1435, _128798)
   Call: (274) [system] is_list(1435)
^  Redo: (273) [user] mfix_vars1(1435, _128798)
^  Unify: (273) [user] mfix_vars1(1435, _128798)
   Call: (274) [system] string(1435)
^  Redo: (273) [user] mfix_vars1(1435, _128798)
^  Unify: (273) [user] mfix_vars1(1435, _128798)
   Call: (274) [system] compound(1435)
^  Redo: (273) [user] mfix_vars1(1435, _128798)
^  Unify: (273) [user] mfix_vars1(1435, _128798)
^  Call: (274) [user] symbol(1435)
^  Unify: (274) [user] symbol(1435)
   Call: (275) [system] atom(1435)
   Fail: (275) [system] atom(1435)
^  Fail: (274) [user] symbol(1435)
^  Redo: (273) [user] mfix_vars1(1435, _128798)
   Call: (274) [system] 1435=_128798
   Exit: (274) [system] 1435=1435
^  Exit: (273) [user] mfix_vars1(1435, 1435)
   Call: (273) [apply] apply:maplist_([0], _128800, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_163124|_163126], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _163124)
^  Unify: (274) [user] mfix_vars1(0, _163124)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _163124)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_167770))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _163124)
^  Unify: (274) [user] mfix_vars1(0, _163124)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _163124)
^  Unify: (274) [user] mfix_vars1(0, _163124)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _163124)
^  Unify: (274) [user] mfix_vars1(0, _163124)
   Call: (275) [system] 0==[_177050, _177056]
^  Redo: (274) [user] mfix_vars1(0, _163124)
^  Unify: (274) [user] mfix_vars1(0, _163124)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _163124)
^  Unify: (274) [user] mfix_vars1(0, _163124)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _163124)
^  Unify: (274) [user] mfix_vars1(0, _163124)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _163124)
^  Unify: (274) [user] mfix_vars1(0, _163124)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _163124)
   Call: (275) [system] 0=_163124
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _163126, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1435, 0], [1435, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0], [";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0], [";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0])
   Call: (270) [system] compound_name_arguments(_57298, '$COMMENT', [";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT', [";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0)\=@='$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _51712)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _213298))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _213298))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _213298))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _213298))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _213298)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _213298)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _218884))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _218884))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _218884)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _218884)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _218884)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0)\=@='$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _213298)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _46100))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _46100))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _46100))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _46100))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _46100)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _46100)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _241204))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _241204))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _241204)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _241204)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _241204)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0)\=@='$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _46100)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0)))
   Call: (261) [system] '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0)\=@='$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _269982, [], _269984)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _269982, [], _269984)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _269982, [], _269984)
   Call: (258) [system] atom('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _269982, [], _269984)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _269982, [], _269984)
   Call: (258) [system] compound('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), _279298, _279300)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT', [";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0])
^  Call: (258) [user] subst_vars([";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0], _281184, [], _269984)
^  Unify: (258) [user] subst_vars([";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0], [";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0], [], [])
   Call: (259) [system] var([";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0])
^  Redo: (258) [user] subst_vars([";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0], _281184, [], _269984)
^  Unify: (258) [user] subst_vars([";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0], [_284920|_284922], [], _269984)
^  Call: (259) [user] subst_vars(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _284920, [], _285860)
^  Unify: (259) [user] subst_vars(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", ";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", [], [])
   Call: (260) [system] var(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)")
^  Redo: (259) [user] subst_vars(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _284920, [], _285860)
^  Unify: (259) [user] subst_vars(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _284920, [], _285860)
   Call: (260) [system] atom(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)")
^  Redo: (259) [user] subst_vars(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _284920, [], _285860)
^  Unify: (259) [user] subst_vars(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _284920, [], _285860)
   Call: (260) [system] compound(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)")
^  Redo: (259) [user] subst_vars(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", _284920, [], _285860)
^  Unify: (259) [user] subst_vars(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", ";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", [], [])
^  Exit: (259) [user] subst_vars(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", ";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", [], [])
^  Call: (259) [user] subst_vars([1435, 0], _284922, [], _269984)
^  Unify: (259) [user] subst_vars([1435, 0], [1435, 0], [], [])
   Call: (260) [system] var([1435, 0])
^  Redo: (259) [user] subst_vars([1435, 0], _284922, [], _269984)
^  Unify: (259) [user] subst_vars([1435, 0], [_300792|_300794], [], _269984)
^  Call: (260) [user] subst_vars(1435, _300792, [], _301732)
^  Unify: (260) [user] subst_vars(1435, 1435, [], [])
   Call: (261) [system] var(1435)
^  Redo: (260) [user] subst_vars(1435, _300792, [], _301732)
^  Unify: (260) [user] subst_vars(1435, _300792, [], _301732)
   Call: (261) [system] atom(1435)
^  Redo: (260) [user] subst_vars(1435, _300792, [], _301732)
^  Unify: (260) [user] subst_vars(1435, _300792, [], _301732)
   Call: (261) [system] compound(1435)
^  Redo: (260) [user] subst_vars(1435, _300792, [], _301732)
^  Unify: (260) [user] subst_vars(1435, 1435, [], [])
^  Exit: (260) [user] subst_vars(1435, 1435, [], [])
^  Call: (260) [user] subst_vars([0], _300794, [], _269984)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _300794, [], _269984)
^  Unify: (260) [user] subst_vars([0], [_316664|_316666], [], _269984)
^  Call: (261) [user] subst_vars(0, _316664, [], _317604)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _316664, [], _317604)
^  Unify: (261) [user] subst_vars(0, _316664, [], _317604)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _316664, [], _317604)
^  Unify: (261) [user] subst_vars(0, _316664, [], _317604)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _316664, [], _317604)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _316666, [], _269984)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _316666, [], _269984)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1435, 0], [1435, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0], [";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0], [], [])
   Call: (258) [system] compound_name_arguments(_269982, '$COMMENT', [";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT', [";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), [], [])
   Call: (257) [system] _340022=metta_file_buffer(+, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify (a $b 1 (d)) (a $a 1 (d)) ok nok)", 1435, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1436, 0, 51404, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$stream_position'(51404, 1436, 0, 51438)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _392752))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _392752))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _392752)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _392752)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _392752)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _392752)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _398364))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _398364))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _398364))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _398364))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _398364)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _398364)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _403950))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _403950))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _403950)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _403950)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _403950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _403950)
   Call: (270) [system] var('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _403950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$VAR'(_411410))
   Call: (270) [system] atom('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _403950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _403950)
   Call: (270) [system] '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _403950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _403950)
   Call: (270) [system] '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _403950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _403950)
   Call: (270) [system] '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0)==[_420690, _420696]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _403950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _403950)
   Call: (270) [system] is_list('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _403950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _403950)
   Call: (270) [system] string('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _403950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _403950)
   Call: (270) [system] compound('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _430892, _430894)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT', [";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0], _434634)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0], _434634)
   Call: (271) [apply] apply:maplist_([";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0], _434634, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0], [_437452|_437454], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _437452)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _437452)
   Call: (273) [system] var(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _437452)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", '$VAR'(_442098))
   Call: (273) [system] atom(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _437452)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _437452)
   Call: (273) [system] ";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)"==true
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _437452)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _437452)
   Call: (273) [system] ";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)"==false
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _437452)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _437452)
   Call: (273) [system] ";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)"==[_451378, _451384]
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _437452)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _437452)
   Call: (273) [system] is_list(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _437452)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _437452)
   Call: (273) [system] string(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)")
   Exit: (273) [system] string(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _437452)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _437452)
   Call: (273) [system] compound(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _437452)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _437452)
^  Call: (273) [user] symbol(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)")
^  Unify: (273) [user] symbol(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)")
   Call: (274) [system] atom(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)")
   Fail: (274) [system] atom(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)")
^  Fail: (273) [user] symbol(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _437452)
   Call: (273) [system] ";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)"=_437452
   Exit: (273) [system] ";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)"=";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)"
^  Exit: (272) [user] mfix_vars1(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", ";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)")
   Call: (272) [apply] apply:maplist_([1436, 0], _437454, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1436, 0], [_475450|_475452], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1436, _475450)
^  Unify: (273) [user] mfix_vars1(1436, _475450)
   Call: (274) [system] var(1436)
^  Redo: (273) [user] mfix_vars1(1436, _475450)
^  Unify: (273) [user] mfix_vars1(1436, '$VAR'(_480096))
   Call: (274) [system] atom(1436)
^  Redo: (273) [user] mfix_vars1(1436, _475450)
^  Unify: (273) [user] mfix_vars1(1436, _475450)
   Call: (274) [system] 1436==true
^  Redo: (273) [user] mfix_vars1(1436, _475450)
^  Unify: (273) [user] mfix_vars1(1436, _475450)
   Call: (274) [system] 1436==false
^  Redo: (273) [user] mfix_vars1(1436, _475450)
^  Unify: (273) [user] mfix_vars1(1436, _475450)
   Call: (274) [system] 1436==[_489376, _489382]
^  Redo: (273) [user] mfix_vars1(1436, _475450)
^  Unify: (273) [user] mfix_vars1(1436, _475450)
   Call: (274) [system] is_list(1436)
^  Redo: (273) [user] mfix_vars1(1436, _475450)
^  Unify: (273) [user] mfix_vars1(1436, _475450)
   Call: (274) [system] string(1436)
^  Redo: (273) [user] mfix_vars1(1436, _475450)
^  Unify: (273) [user] mfix_vars1(1436, _475450)
   Call: (274) [system] compound(1436)
^  Redo: (273) [user] mfix_vars1(1436, _475450)
^  Unify: (273) [user] mfix_vars1(1436, _475450)
^  Call: (274) [user] symbol(1436)
^  Unify: (274) [user] symbol(1436)
   Call: (275) [system] atom(1436)
   Fail: (275) [system] atom(1436)
^  Fail: (274) [user] symbol(1436)
^  Redo: (273) [user] mfix_vars1(1436, _475450)
   Call: (274) [system] 1436=_475450
   Exit: (274) [system] 1436=1436
^  Exit: (273) [user] mfix_vars1(1436, 1436)
   Call: (273) [apply] apply:maplist_([0], _475452, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_509776|_509778], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _509776)
^  Unify: (274) [user] mfix_vars1(0, _509776)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _509776)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_514422))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _509776)
^  Unify: (274) [user] mfix_vars1(0, _509776)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _509776)
^  Unify: (274) [user] mfix_vars1(0, _509776)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _509776)
^  Unify: (274) [user] mfix_vars1(0, _509776)
   Call: (275) [system] 0==[_6056, _6062]
^  Redo: (274) [user] mfix_vars1(0, _6048)
^  Unify: (274) [user] mfix_vars1(0, _6048)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _6048)
^  Unify: (274) [user] mfix_vars1(0, _6048)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _6048)
^  Unify: (274) [user] mfix_vars1(0, _6048)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _6048)
^  Unify: (274) [user] mfix_vars1(0, _6048)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6048)
   Call: (275) [system] 0=_6048
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6050, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1436, 0], [1436, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0], [";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0], [";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0])
   Call: (270) [system] compound_name_arguments(_5990, '$COMMENT', [";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT', [";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0)\=@='$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _5976)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _42084))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _42084))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _42084))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _42084))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _42084)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _42084)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _47670))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _47670))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _47670)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _47670)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _47670)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0)\=@='$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _42084)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _5956))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _5956))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _5956))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _5956))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _5956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _5956)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _69990))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _69990))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _69990)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _69990)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _69990)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0)\=@='$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _5956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0)))
   Call: (261) [system] '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0)\=@='$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _98768, [], _98770)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _98768, [], _98770)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _98768, [], _98770)
   Call: (258) [system] atom('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _98768, [], _98770)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _98768, [], _98770)
   Call: (258) [system] compound('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), _108084, _108086)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT', [";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0])
^  Call: (258) [user] subst_vars([";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0], _109970, [], _98770)
^  Unify: (258) [user] subst_vars([";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0], [";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0], [], [])
   Call: (259) [system] var([";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0])
^  Redo: (258) [user] subst_vars([";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0], _109970, [], _98770)
^  Unify: (258) [user] subst_vars([";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0], [_113706|_113708], [], _98770)
^  Call: (259) [user] subst_vars(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _113706, [], _114646)
^  Unify: (259) [user] subst_vars(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", ";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", [], [])
   Call: (260) [system] var(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)")
^  Redo: (259) [user] subst_vars(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _113706, [], _114646)
^  Unify: (259) [user] subst_vars(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _113706, [], _114646)
   Call: (260) [system] atom(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)")
^  Redo: (259) [user] subst_vars(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _113706, [], _114646)
^  Unify: (259) [user] subst_vars(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _113706, [], _114646)
   Call: (260) [system] compound(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)")
^  Redo: (259) [user] subst_vars(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", _113706, [], _114646)
^  Unify: (259) [user] subst_vars(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", ";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", [], [])
^  Exit: (259) [user] subst_vars(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", ";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", [], [])
^  Call: (259) [user] subst_vars([1436, 0], _113708, [], _98770)
^  Unify: (259) [user] subst_vars([1436, 0], [1436, 0], [], [])
   Call: (260) [system] var([1436, 0])
^  Redo: (259) [user] subst_vars([1436, 0], _113708, [], _98770)
^  Unify: (259) [user] subst_vars([1436, 0], [_129578|_129580], [], _98770)
^  Call: (260) [user] subst_vars(1436, _129578, [], _130518)
^  Unify: (260) [user] subst_vars(1436, 1436, [], [])
   Call: (261) [system] var(1436)
^  Redo: (260) [user] subst_vars(1436, _129578, [], _130518)
^  Unify: (260) [user] subst_vars(1436, _129578, [], _130518)
   Call: (261) [system] atom(1436)
^  Redo: (260) [user] subst_vars(1436, _129578, [], _130518)
^  Unify: (260) [user] subst_vars(1436, _129578, [], _130518)
   Call: (261) [system] compound(1436)
^  Redo: (260) [user] subst_vars(1436, _129578, [], _130518)
^  Unify: (260) [user] subst_vars(1436, 1436, [], [])
^  Exit: (260) [user] subst_vars(1436, 1436, [], [])
^  Call: (260) [user] subst_vars([0], _129580, [], _98770)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _129580, [], _98770)
^  Unify: (260) [user] subst_vars([0], [_145450|_145452], [], _98770)
^  Call: (261) [user] subst_vars(0, _145450, [], _146390)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _145450, [], _146390)
^  Unify: (261) [user] subst_vars(0, _145450, [], _146390)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _145450, [], _146390)
^  Unify: (261) [user] subst_vars(0, _145450, [], _146390)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _145450, [], _146390)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _145452, [], _98770)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _145452, [], _98770)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1436, 0], [1436, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0], [";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0], [], [])
   Call: (258) [system] compound_name_arguments(_98768, '$COMMENT', [";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT', [";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), [], [])
   Call: (257) [system] _168808=metta_file_buffer(+, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify (a $b c) (a b $c) (ok $b $c) nok)", 1436, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1437, 0, 51460, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$stream_position'(51460, 1437, 0, 51494)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _221534))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _221534))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _221534)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _221534)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _221534)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _221534)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _227146))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _227146))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _227146))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _227146))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _227146)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _227146)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _232732))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _232732))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _232732)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _232732)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _232732)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _232732)
   Call: (270) [system] var('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _232732)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$VAR'(_240192))
   Call: (270) [system] atom('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _232732)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _232732)
   Call: (270) [system] '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _232732)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _232732)
   Call: (270) [system] '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _232732)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _232732)
   Call: (270) [system] '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0)==[_249472, _249478]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _232732)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _232732)
   Call: (270) [system] is_list('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _232732)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _232732)
   Call: (270) [system] string('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _232732)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _232732)
   Call: (270) [system] compound('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _259674, _259676)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT', [";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0], _263416)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0], _263416)
   Call: (271) [apply] apply:maplist_([";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0], _263416, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0], [_266234|_266236], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            !(unify $a (a b c) (ok $a) nok)", _266234)
^  Unify: (272) [user] mfix_vars1(";;            !(unify $a (a b c) (ok $a) nok)", _266234)
   Call: (273) [system] var(";;            !(unify $a (a b c) (ok $a) nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify $a (a b c) (ok $a) nok)", _266234)
^  Unify: (272) [user] mfix_vars1(";;            !(unify $a (a b c) (ok $a) nok)", '$VAR'(_270880))
   Call: (273) [system] atom(";;            !(unify $a (a b c) (ok $a) nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify $a (a b c) (ok $a) nok)", _266234)
^  Unify: (272) [user] mfix_vars1(";;            !(unify $a (a b c) (ok $a) nok)", _266234)
   Call: (273) [system] ";;            !(unify $a (a b c) (ok $a) nok)"==true
^  Redo: (272) [user] mfix_vars1(";;            !(unify $a (a b c) (ok $a) nok)", _266234)
^  Unify: (272) [user] mfix_vars1(";;            !(unify $a (a b c) (ok $a) nok)", _266234)
   Call: (273) [system] ";;            !(unify $a (a b c) (ok $a) nok)"==false
^  Redo: (272) [user] mfix_vars1(";;            !(unify $a (a b c) (ok $a) nok)", _266234)
^  Unify: (272) [user] mfix_vars1(";;            !(unify $a (a b c) (ok $a) nok)", _266234)
   Call: (273) [system] ";;            !(unify $a (a b c) (ok $a) nok)"==[_280160, _280166]
^  Redo: (272) [user] mfix_vars1(";;            !(unify $a (a b c) (ok $a) nok)", _266234)
^  Unify: (272) [user] mfix_vars1(";;            !(unify $a (a b c) (ok $a) nok)", _266234)
   Call: (273) [system] is_list(";;            !(unify $a (a b c) (ok $a) nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify $a (a b c) (ok $a) nok)", _266234)
^  Unify: (272) [user] mfix_vars1(";;            !(unify $a (a b c) (ok $a) nok)", _266234)
   Call: (273) [system] string(";;            !(unify $a (a b c) (ok $a) nok)")
   Exit: (273) [system] string(";;            !(unify $a (a b c) (ok $a) nok)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            !(unify $a (a b c) (ok $a) nok)", _266234)
^  Unify: (272) [user] mfix_vars1(";;            !(unify $a (a b c) (ok $a) nok)", _266234)
   Call: (273) [system] compound(";;            !(unify $a (a b c) (ok $a) nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify $a (a b c) (ok $a) nok)", _266234)
^  Unify: (272) [user] mfix_vars1(";;            !(unify $a (a b c) (ok $a) nok)", _266234)
^  Call: (273) [user] symbol(";;            !(unify $a (a b c) (ok $a) nok)")
^  Unify: (273) [user] symbol(";;            !(unify $a (a b c) (ok $a) nok)")
   Call: (274) [system] atom(";;            !(unify $a (a b c) (ok $a) nok)")
   Fail: (274) [system] atom(";;            !(unify $a (a b c) (ok $a) nok)")
^  Fail: (273) [user] symbol(";;            !(unify $a (a b c) (ok $a) nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify $a (a b c) (ok $a) nok)", _266234)
   Call: (273) [system] ";;            !(unify $a (a b c) (ok $a) nok)"=_266234
   Exit: (273) [system] ";;            !(unify $a (a b c) (ok $a) nok)"=";;            !(unify $a (a b c) (ok $a) nok)"
^  Exit: (272) [user] mfix_vars1(";;            !(unify $a (a b c) (ok $a) nok)", ";;            !(unify $a (a b c) (ok $a) nok)")
   Call: (272) [apply] apply:maplist_([1437, 0], _266236, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1437, 0], [_304232|_304234], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1437, _304232)
^  Unify: (273) [user] mfix_vars1(1437, _304232)
   Call: (274) [system] var(1437)
^  Redo: (273) [user] mfix_vars1(1437, _304232)
^  Unify: (273) [user] mfix_vars1(1437, '$VAR'(_308878))
   Call: (274) [system] atom(1437)
^  Redo: (273) [user] mfix_vars1(1437, _304232)
^  Unify: (273) [user] mfix_vars1(1437, _304232)
   Call: (274) [system] 1437==true
^  Redo: (273) [user] mfix_vars1(1437, _304232)
^  Unify: (273) [user] mfix_vars1(1437, _304232)
   Call: (274) [system] 1437==false
^  Redo: (273) [user] mfix_vars1(1437, _304232)
^  Unify: (273) [user] mfix_vars1(1437, _304232)
   Call: (274) [system] 1437==[_318158, _318164]
^  Redo: (273) [user] mfix_vars1(1437, _304232)
^  Unify: (273) [user] mfix_vars1(1437, _304232)
   Call: (274) [system] is_list(1437)
^  Redo: (273) [user] mfix_vars1(1437, _304232)
^  Unify: (273) [user] mfix_vars1(1437, _304232)
   Call: (274) [system] string(1437)
^  Redo: (273) [user] mfix_vars1(1437, _304232)
^  Unify: (273) [user] mfix_vars1(1437, _304232)
   Call: (274) [system] compound(1437)
^  Redo: (273) [user] mfix_vars1(1437, _304232)
^  Unify: (273) [user] mfix_vars1(1437, _304232)
^  Call: (274) [user] symbol(1437)
^  Unify: (274) [user] symbol(1437)
   Call: (275) [system] atom(1437)
   Fail: (275) [system] atom(1437)
^  Fail: (274) [user] symbol(1437)
^  Redo: (273) [user] mfix_vars1(1437, _304232)
   Call: (274) [system] 1437=_304232
   Exit: (274) [system] 1437=1437
^  Exit: (273) [user] mfix_vars1(1437, 1437)
   Call: (273) [apply] apply:maplist_([0], _304234, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_338558|_338560], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _338558)
^  Unify: (274) [user] mfix_vars1(0, _338558)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _338558)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_343204))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _338558)
^  Unify: (274) [user] mfix_vars1(0, _338558)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _338558)
^  Unify: (274) [user] mfix_vars1(0, _338558)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _338558)
^  Unify: (274) [user] mfix_vars1(0, _338558)
   Call: (275) [system] 0==[_352484, _352490]
^  Redo: (274) [user] mfix_vars1(0, _338558)
^  Unify: (274) [user] mfix_vars1(0, _338558)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _338558)
^  Unify: (274) [user] mfix_vars1(0, _338558)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _338558)
^  Unify: (274) [user] mfix_vars1(0, _338558)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _338558)
^  Unify: (274) [user] mfix_vars1(0, _338558)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _338558)
   Call: (275) [system] 0=_338558
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _338560, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1437, 0], [1437, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0], [";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0], [";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0])
   Call: (270) [system] compound_name_arguments(_232732, '$COMMENT', [";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT', [";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0)\=@='$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _227146)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _388732))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _388732))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _388732))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _388732))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _388732)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _388732)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _394318))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _394318))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _394318)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _394318)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _394318)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0)\=@='$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _388732)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _221534))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _221534))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _221534))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _221534))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _221534)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _221534)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _416638))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _416638))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _416638)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _416638)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _416638)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0)\=@='$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _221534)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0)))
   Call: (261) [system] '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0)\=@='$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _445416, [], _445418)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _445416, [], _445418)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _445416, [], _445418)
   Call: (258) [system] atom('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _445416, [], _445418)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _445416, [], _445418)
   Call: (258) [system] compound('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), _454732, _454734)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT', [";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0])
^  Call: (258) [user] subst_vars([";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0], _456618, [], _445418)
^  Unify: (258) [user] subst_vars([";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0], [";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0], [], [])
   Call: (259) [system] var([";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0])
^  Redo: (258) [user] subst_vars([";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0], _456618, [], _445418)
^  Unify: (258) [user] subst_vars([";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0], [_460354|_460356], [], _445418)
^  Call: (259) [user] subst_vars(";;            !(unify $a (a b c) (ok $a) nok)", _460354, [], _461294)
^  Unify: (259) [user] subst_vars(";;            !(unify $a (a b c) (ok $a) nok)", ";;            !(unify $a (a b c) (ok $a) nok)", [], [])
   Call: (260) [system] var(";;            !(unify $a (a b c) (ok $a) nok)")
^  Redo: (259) [user] subst_vars(";;            !(unify $a (a b c) (ok $a) nok)", _460354, [], _461294)
^  Unify: (259) [user] subst_vars(";;            !(unify $a (a b c) (ok $a) nok)", _460354, [], _461294)
   Call: (260) [system] atom(";;            !(unify $a (a b c) (ok $a) nok)")
^  Redo: (259) [user] subst_vars(";;            !(unify $a (a b c) (ok $a) nok)", _460354, [], _461294)
^  Unify: (259) [user] subst_vars(";;            !(unify $a (a b c) (ok $a) nok)", _460354, [], _461294)
   Call: (260) [system] compound(";;            !(unify $a (a b c) (ok $a) nok)")
^  Redo: (259) [user] subst_vars(";;            !(unify $a (a b c) (ok $a) nok)", _460354, [], _461294)
^  Unify: (259) [user] subst_vars(";;            !(unify $a (a b c) (ok $a) nok)", ";;            !(unify $a (a b c) (ok $a) nok)", [], [])
^  Exit: (259) [user] subst_vars(";;            !(unify $a (a b c) (ok $a) nok)", ";;            !(unify $a (a b c) (ok $a) nok)", [], [])
^  Call: (259) [user] subst_vars([1437, 0], _460356, [], _445418)
^  Unify: (259) [user] subst_vars([1437, 0], [1437, 0], [], [])
   Call: (260) [system] var([1437, 0])
^  Redo: (259) [user] subst_vars([1437, 0], _460356, [], _445418)
^  Unify: (259) [user] subst_vars([1437, 0], [_476226|_476228], [], _445418)
^  Call: (260) [user] subst_vars(1437, _476226, [], _477166)
^  Unify: (260) [user] subst_vars(1437, 1437, [], [])
   Call: (261) [system] var(1437)
^  Redo: (260) [user] subst_vars(1437, _476226, [], _477166)
^  Unify: (260) [user] subst_vars(1437, _476226, [], _477166)
   Call: (261) [system] atom(1437)
^  Redo: (260) [user] subst_vars(1437, _476226, [], _477166)
^  Unify: (260) [user] subst_vars(1437, _476226, [], _477166)
   Call: (261) [system] compound(1437)
^  Redo: (260) [user] subst_vars(1437, _476226, [], _477166)
^  Unify: (260) [user] subst_vars(1437, 1437, [], [])
^  Exit: (260) [user] subst_vars(1437, 1437, [], [])
^  Call: (260) [user] subst_vars([0], _476228, [], _445418)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _476228, [], _445418)
^  Unify: (260) [user] subst_vars([0], [_492098|_492100], [], _445418)
^  Call: (261) [user] subst_vars(0, _492098, [], _493038)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _492098, [], _493038)
^  Unify: (261) [user] subst_vars(0, _492098, [], _493038)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _492098, [], _493038)
^  Unify: (261) [user] subst_vars(0, _492098, [], _493038)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _492098, [], _493038)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _492100, [], _445418)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _492100, [], _445418)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1437, 0], [1437, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0], [";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0], [], [])
   Call: (258) [system] compound_name_arguments(_445416, '$COMMENT', [";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT', [";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), [], [])
   Call: (257) [system] _515456=metta_file_buffer(+, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify $a (a b c) (ok $a) nok)", 1437, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1438, 0, 51506, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$stream_position'(51506, 1438, 0, 51540)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _51090))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _51090))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _51090)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _51090)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _51090)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _51090)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _56702))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _56702))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _56702))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _56702))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _56702)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _56702)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _62288))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _62288))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _62288)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _62288)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _62288)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _62288)
   Call: (270) [system] var('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _62288)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$VAR'(_69748))
   Call: (270) [system] atom('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _62288)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _62288)
   Call: (270) [system] '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _62288)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _62288)
   Call: (270) [system] '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _62288)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _62288)
   Call: (270) [system] '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0)==[_79028, _79034]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _62288)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _62288)
   Call: (270) [system] is_list('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _62288)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _62288)
   Call: (270) [system] string('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _62288)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _62288)
   Call: (270) [system] compound('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _89230, _89232)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT', [";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0], _92972)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0], _92972)
   Call: (271) [apply] apply:maplist_([";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0], _92972, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0], [_95790|_95792], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            !(unify (a b c) $a (ok $a) nok)", _95790)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a b c) $a (ok $a) nok)", _95790)
   Call: (273) [system] var(";;            !(unify (a b c) $a (ok $a) nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a b c) $a (ok $a) nok)", _95790)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a b c) $a (ok $a) nok)", '$VAR'(_100436))
   Call: (273) [system] atom(";;            !(unify (a b c) $a (ok $a) nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a b c) $a (ok $a) nok)", _95790)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a b c) $a (ok $a) nok)", _95790)
   Call: (273) [system] ";;            !(unify (a b c) $a (ok $a) nok)"==true
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a b c) $a (ok $a) nok)", _95790)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a b c) $a (ok $a) nok)", _95790)
   Call: (273) [system] ";;            !(unify (a b c) $a (ok $a) nok)"==false
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a b c) $a (ok $a) nok)", _95790)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a b c) $a (ok $a) nok)", _95790)
   Call: (273) [system] ";;            !(unify (a b c) $a (ok $a) nok)"==[_109716, _109722]
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a b c) $a (ok $a) nok)", _95790)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a b c) $a (ok $a) nok)", _95790)
   Call: (273) [system] is_list(";;            !(unify (a b c) $a (ok $a) nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a b c) $a (ok $a) nok)", _95790)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a b c) $a (ok $a) nok)", _95790)
   Call: (273) [system] string(";;            !(unify (a b c) $a (ok $a) nok)")
   Exit: (273) [system] string(";;            !(unify (a b c) $a (ok $a) nok)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a b c) $a (ok $a) nok)", _95790)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a b c) $a (ok $a) nok)", _95790)
   Call: (273) [system] compound(";;            !(unify (a b c) $a (ok $a) nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a b c) $a (ok $a) nok)", _95790)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a b c) $a (ok $a) nok)", _95790)
^  Call: (273) [user] symbol(";;            !(unify (a b c) $a (ok $a) nok)")
^  Unify: (273) [user] symbol(";;            !(unify (a b c) $a (ok $a) nok)")
   Call: (274) [system] atom(";;            !(unify (a b c) $a (ok $a) nok)")
   Fail: (274) [system] atom(";;            !(unify (a b c) $a (ok $a) nok)")
^  Fail: (273) [user] symbol(";;            !(unify (a b c) $a (ok $a) nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a b c) $a (ok $a) nok)", _95790)
   Call: (273) [system] ";;            !(unify (a b c) $a (ok $a) nok)"=_95790
   Exit: (273) [system] ";;            !(unify (a b c) $a (ok $a) nok)"=";;            !(unify (a b c) $a (ok $a) nok)"
^  Exit: (272) [user] mfix_vars1(";;            !(unify (a b c) $a (ok $a) nok)", ";;            !(unify (a b c) $a (ok $a) nok)")
   Call: (272) [apply] apply:maplist_([1438, 0], _95792, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1438, 0], [_133788|_133790], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1438, _133788)
^  Unify: (273) [user] mfix_vars1(1438, _133788)
   Call: (274) [system] var(1438)
^  Redo: (273) [user] mfix_vars1(1438, _133788)
^  Unify: (273) [user] mfix_vars1(1438, '$VAR'(_138434))
   Call: (274) [system] atom(1438)
^  Redo: (273) [user] mfix_vars1(1438, _133788)
^  Unify: (273) [user] mfix_vars1(1438, _133788)
   Call: (274) [system] 1438==true
^  Redo: (273) [user] mfix_vars1(1438, _133788)
^  Unify: (273) [user] mfix_vars1(1438, _133788)
   Call: (274) [system] 1438==false
^  Redo: (273) [user] mfix_vars1(1438, _133788)
^  Unify: (273) [user] mfix_vars1(1438, _133788)
   Call: (274) [system] 1438==[_147714, _147720]
^  Redo: (273) [user] mfix_vars1(1438, _133788)
^  Unify: (273) [user] mfix_vars1(1438, _133788)
   Call: (274) [system] is_list(1438)
^  Redo: (273) [user] mfix_vars1(1438, _133788)
^  Unify: (273) [user] mfix_vars1(1438, _133788)
   Call: (274) [system] string(1438)
^  Redo: (273) [user] mfix_vars1(1438, _133788)
^  Unify: (273) [user] mfix_vars1(1438, _133788)
   Call: (274) [system] compound(1438)
^  Redo: (273) [user] mfix_vars1(1438, _133788)
^  Unify: (273) [user] mfix_vars1(1438, _133788)
^  Call: (274) [user] symbol(1438)
^  Unify: (274) [user] symbol(1438)
   Call: (275) [system] atom(1438)
   Fail: (275) [system] atom(1438)
^  Fail: (274) [user] symbol(1438)
^  Redo: (273) [user] mfix_vars1(1438, _133788)
   Call: (274) [system] 1438=_133788
   Exit: (274) [system] 1438=1438
^  Exit: (273) [user] mfix_vars1(1438, 1438)
   Call: (273) [apply] apply:maplist_([0], _133790, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_168114|_168116], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _168114)
^  Unify: (274) [user] mfix_vars1(0, _168114)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _168114)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_172760))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _168114)
^  Unify: (274) [user] mfix_vars1(0, _168114)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _168114)
^  Unify: (274) [user] mfix_vars1(0, _168114)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _168114)
^  Unify: (274) [user] mfix_vars1(0, _168114)
   Call: (275) [system] 0==[_182040, _182046]
^  Redo: (274) [user] mfix_vars1(0, _168114)
^  Unify: (274) [user] mfix_vars1(0, _168114)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _168114)
^  Unify: (274) [user] mfix_vars1(0, _168114)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _168114)
^  Unify: (274) [user] mfix_vars1(0, _168114)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _168114)
^  Unify: (274) [user] mfix_vars1(0, _168114)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _168114)
   Call: (275) [system] 0=_168114
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _168116, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1438, 0], [1438, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0], [";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0], [";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0])
   Call: (270) [system] compound_name_arguments(_62288, '$COMMENT', [";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT', [";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0)\=@='$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _56702)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _218288))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _218288))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _218288))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _218288))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _218288)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _218288)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _223874))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _223874))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _223874)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _223874)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _223874)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0)\=@='$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _218288)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _51090))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _51090))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _51090))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _51090))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _51090)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _51090)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _246194))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _246194))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _246194)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _246194)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _246194)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0)\=@='$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _51090)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0)))
   Call: (261) [system] '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0)\=@='$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _274972, [], _274974)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _274972, [], _274974)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _274972, [], _274974)
   Call: (258) [system] atom('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _274972, [], _274974)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _274972, [], _274974)
   Call: (258) [system] compound('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), _284288, _284290)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT', [";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0])
^  Call: (258) [user] subst_vars([";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0], _286174, [], _274974)
^  Unify: (258) [user] subst_vars([";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0], [";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0], [], [])
   Call: (259) [system] var([";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0])
^  Redo: (258) [user] subst_vars([";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0], _286174, [], _274974)
^  Unify: (258) [user] subst_vars([";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0], [_289910|_289912], [], _274974)
^  Call: (259) [user] subst_vars(";;            !(unify (a b c) $a (ok $a) nok)", _289910, [], _290850)
^  Unify: (259) [user] subst_vars(";;            !(unify (a b c) $a (ok $a) nok)", ";;            !(unify (a b c) $a (ok $a) nok)", [], [])
   Call: (260) [system] var(";;            !(unify (a b c) $a (ok $a) nok)")
^  Redo: (259) [user] subst_vars(";;            !(unify (a b c) $a (ok $a) nok)", _289910, [], _290850)
^  Unify: (259) [user] subst_vars(";;            !(unify (a b c) $a (ok $a) nok)", _289910, [], _290850)
   Call: (260) [system] atom(";;            !(unify (a b c) $a (ok $a) nok)")
^  Redo: (259) [user] subst_vars(";;            !(unify (a b c) $a (ok $a) nok)", _289910, [], _290850)
^  Unify: (259) [user] subst_vars(";;            !(unify (a b c) $a (ok $a) nok)", _289910, [], _290850)
   Call: (260) [system] compound(";;            !(unify (a b c) $a (ok $a) nok)")
^  Redo: (259) [user] subst_vars(";;            !(unify (a b c) $a (ok $a) nok)", _289910, [], _290850)
^  Unify: (259) [user] subst_vars(";;            !(unify (a b c) $a (ok $a) nok)", ";;            !(unify (a b c) $a (ok $a) nok)", [], [])
^  Exit: (259) [user] subst_vars(";;            !(unify (a b c) $a (ok $a) nok)", ";;            !(unify (a b c) $a (ok $a) nok)", [], [])
^  Call: (259) [user] subst_vars([1438, 0], _289912, [], _274974)
^  Unify: (259) [user] subst_vars([1438, 0], [1438, 0], [], [])
   Call: (260) [system] var([1438, 0])
^  Redo: (259) [user] subst_vars([1438, 0], _289912, [], _274974)
^  Unify: (259) [user] subst_vars([1438, 0], [_305782|_305784], [], _274974)
^  Call: (260) [user] subst_vars(1438, _305782, [], _306722)
^  Unify: (260) [user] subst_vars(1438, 1438, [], [])
   Call: (261) [system] var(1438)
^  Redo: (260) [user] subst_vars(1438, _305782, [], _306722)
^  Unify: (260) [user] subst_vars(1438, _305782, [], _306722)
   Call: (261) [system] atom(1438)
^  Redo: (260) [user] subst_vars(1438, _305782, [], _306722)
^  Unify: (260) [user] subst_vars(1438, _305782, [], _306722)
   Call: (261) [system] compound(1438)
^  Redo: (260) [user] subst_vars(1438, _305782, [], _306722)
^  Unify: (260) [user] subst_vars(1438, 1438, [], [])
^  Exit: (260) [user] subst_vars(1438, 1438, [], [])
^  Call: (260) [user] subst_vars([0], _305784, [], _274974)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _305784, [], _274974)
^  Unify: (260) [user] subst_vars([0], [_321654|_321656], [], _274974)
^  Call: (261) [user] subst_vars(0, _321654, [], _322594)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _321654, [], _322594)
^  Unify: (261) [user] subst_vars(0, _321654, [], _322594)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _321654, [], _322594)
^  Unify: (261) [user] subst_vars(0, _321654, [], _322594)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _321654, [], _322594)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _321656, [], _274974)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _321656, [], _274974)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1438, 0], [1438, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0], [";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0], [], [])
   Call: (258) [system] compound_name_arguments(_274972, '$COMMENT', [";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT', [";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), [], [])
   Call: (257) [system] _345012=metta_file_buffer(+, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify (a b c) $a (ok $a) nok)", 1438, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1439, 0, 51552, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$stream_position'(51552, 1439, 0, 51586)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _397738))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _397738))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _397738)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _397738)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _397738)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _397738)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _403350))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _403350))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _403350))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _403350))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _403350)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _403350)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _408936))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _408936))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _408936)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _408936)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _408936)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _408936)
   Call: (270) [system] var('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _408936)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$VAR'(_416396))
   Call: (270) [system] atom('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _408936)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _408936)
   Call: (270) [system] '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _408936)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _408936)
   Call: (270) [system] '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _408936)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _408936)
   Call: (270) [system] '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0)==[_425676, _425682]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _408936)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _408936)
   Call: (270) [system] is_list('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _408936)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _408936)
   Call: (270) [system] string('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _408936)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _408936)
   Call: (270) [system] compound('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _435878, _435880)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT', [";;            !(unify (a b c) (a b d) ok nok)", 1439, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            !(unify (a b c) (a b d) ok nok)", 1439, 0], _439620)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            !(unify (a b c) (a b d) ok nok)", 1439, 0], _439620)
   Call: (271) [apply] apply:maplist_([";;            !(unify (a b c) (a b d) ok nok)", 1439, 0], _439620, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            !(unify (a b c) (a b d) ok nok)", 1439, 0], [_442438|_442440], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            !(unify (a b c) (a b d) ok nok)", _442438)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a b c) (a b d) ok nok)", _442438)
   Call: (273) [system] var(";;            !(unify (a b c) (a b d) ok nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a b c) (a b d) ok nok)", _442438)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a b c) (a b d) ok nok)", '$VAR'(_447084))
   Call: (273) [system] atom(";;            !(unify (a b c) (a b d) ok nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a b c) (a b d) ok nok)", _442438)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a b c) (a b d) ok nok)", _442438)
   Call: (273) [system] ";;            !(unify (a b c) (a b d) ok nok)"==true
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a b c) (a b d) ok nok)", _442438)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a b c) (a b d) ok nok)", _442438)
   Call: (273) [system] ";;            !(unify (a b c) (a b d) ok nok)"==false
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a b c) (a b d) ok nok)", _442438)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a b c) (a b d) ok nok)", _442438)
   Call: (273) [system] ";;            !(unify (a b c) (a b d) ok nok)"==[_456364, _456370]
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a b c) (a b d) ok nok)", _442438)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a b c) (a b d) ok nok)", _442438)
   Call: (273) [system] is_list(";;            !(unify (a b c) (a b d) ok nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a b c) (a b d) ok nok)", _442438)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a b c) (a b d) ok nok)", _442438)
   Call: (273) [system] string(";;            !(unify (a b c) (a b d) ok nok)")
   Exit: (273) [system] string(";;            !(unify (a b c) (a b d) ok nok)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a b c) (a b d) ok nok)", _442438)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a b c) (a b d) ok nok)", _442438)
   Call: (273) [system] compound(";;            !(unify (a b c) (a b d) ok nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a b c) (a b d) ok nok)", _442438)
^  Unify: (272) [user] mfix_vars1(";;            !(unify (a b c) (a b d) ok nok)", _442438)
^  Call: (273) [user] symbol(";;            !(unify (a b c) (a b d) ok nok)")
^  Unify: (273) [user] symbol(";;            !(unify (a b c) (a b d) ok nok)")
   Call: (274) [system] atom(";;            !(unify (a b c) (a b d) ok nok)")
   Fail: (274) [system] atom(";;            !(unify (a b c) (a b d) ok nok)")
^  Fail: (273) [user] symbol(";;            !(unify (a b c) (a b d) ok nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify (a b c) (a b d) ok nok)", _442438)
   Call: (273) [system] ";;            !(unify (a b c) (a b d) ok nok)"=_442438
   Exit: (273) [system] ";;            !(unify (a b c) (a b d) ok nok)"=";;            !(unify (a b c) (a b d) ok nok)"
^  Exit: (272) [user] mfix_vars1(";;            !(unify (a b c) (a b d) ok nok)", ";;            !(unify (a b c) (a b d) ok nok)")
   Call: (272) [apply] apply:maplist_([1439, 0], _442440, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1439, 0], [_480436|_480438], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1439, _480436)
^  Unify: (273) [user] mfix_vars1(1439, _480436)
   Call: (274) [system] var(1439)
^  Redo: (273) [user] mfix_vars1(1439, _480436)
^  Unify: (273) [user] mfix_vars1(1439, '$VAR'(_485082))
   Call: (274) [system] atom(1439)
^  Redo: (273) [user] mfix_vars1(1439, _480436)
^  Unify: (273) [user] mfix_vars1(1439, _480436)
   Call: (274) [system] 1439==true
^  Redo: (273) [user] mfix_vars1(1439, _480436)
^  Unify: (273) [user] mfix_vars1(1439, _480436)
   Call: (274) [system] 1439==false
^  Redo: (273) [user] mfix_vars1(1439, _480436)
^  Unify: (273) [user] mfix_vars1(1439, _480436)
   Call: (274) [system] 1439==[_494362, _494368]
^  Redo: (273) [user] mfix_vars1(1439, _480436)
^  Unify: (273) [user] mfix_vars1(1439, _480436)
   Call: (274) [system] is_list(1439)
^  Redo: (273) [user] mfix_vars1(1439, _480436)
^  Unify: (273) [user] mfix_vars1(1439, _480436)
   Call: (274) [system] string(1439)
^  Redo: (273) [user] mfix_vars1(1439, _480436)
^  Unify: (273) [user] mfix_vars1(1439, _480436)
   Call: (274) [system] compound(1439)
^  Redo: (273) [user] mfix_vars1(1439, _480436)
^  Unify: (273) [user] mfix_vars1(1439, _480436)
^  Call: (274) [user] symbol(1439)
^  Unify: (274) [user] symbol(1439)
   Call: (275) [system] atom(1439)
   Fail: (275) [system] atom(1439)
^  Fail: (274) [user] symbol(1439)
^  Redo: (273) [user] mfix_vars1(1439, _480436)
   Call: (274) [system] 1439=_480436
   Exit: (274) [system] 1439=1439
^  Exit: (273) [user] mfix_vars1(1439, 1439)
   Call: (273) [apply] apply:maplist_([0], _480438, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_514762|_514764], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _514762)
^  Unify: (274) [user] mfix_vars1(0, _514762)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _514762)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_519408))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _514762)
^  Unify: (274) [user] mfix_vars1(0, _514762)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _6044)
^  Unify: (274) [user] mfix_vars1(0, _6044)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _6044)
^  Unify: (274) [user] mfix_vars1(0, _6044)
   Call: (275) [system] 0==[_10638, _10644]
^  Redo: (274) [user] mfix_vars1(0, _6044)
^  Unify: (274) [user] mfix_vars1(0, _6044)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _6044)
^  Unify: (274) [user] mfix_vars1(0, _6044)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _6044)
^  Unify: (274) [user] mfix_vars1(0, _6044)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _6044)
^  Unify: (274) [user] mfix_vars1(0, _6044)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6044)
   Call: (275) [system] 0=_6044
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6046, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1439, 0], [1439, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            !(unify (a b c) (a b d) ok nok)", 1439, 0], [";;            !(unify (a b c) (a b d) ok nok)", 1439, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            !(unify (a b c) (a b d) ok nok)", 1439, 0], [";;            !(unify (a b c) (a b d) ok nok)", 1439, 0])
   Call: (270) [system] compound_name_arguments(_5986, '$COMMENT', [";;            !(unify (a b c) (a b d) ok nok)", 1439, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT', [";;            !(unify (a b c) (a b d) ok nok)", 1439, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0)\=@='$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _5972)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _46886))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _46886))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _46886))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _46886))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _46886)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _46886)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _52472))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _52472))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _52472)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _52472)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _52472)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0)\=@='$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _46886)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _5952))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _5952))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _5952))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _5952))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _5952)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _74792))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _74792))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _74792)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _74792)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _74792)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0)\=@='$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0)))
   Call: (261) [system] '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0)\=@='$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _103570, [], _103572)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _103570, [], _103572)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _103570, [], _103572)
   Call: (258) [system] atom('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _103570, [], _103572)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _103570, [], _103572)
   Call: (258) [system] compound('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), _112886, _112888)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT', [";;            !(unify (a b c) (a b d) ok nok)", 1439, 0])
^  Call: (258) [user] subst_vars([";;            !(unify (a b c) (a b d) ok nok)", 1439, 0], _114772, [], _103572)
^  Unify: (258) [user] subst_vars([";;            !(unify (a b c) (a b d) ok nok)", 1439, 0], [";;            !(unify (a b c) (a b d) ok nok)", 1439, 0], [], [])
   Call: (259) [system] var([";;            !(unify (a b c) (a b d) ok nok)", 1439, 0])
^  Redo: (258) [user] subst_vars([";;            !(unify (a b c) (a b d) ok nok)", 1439, 0], _114772, [], _103572)
^  Unify: (258) [user] subst_vars([";;            !(unify (a b c) (a b d) ok nok)", 1439, 0], [_118508|_118510], [], _103572)
^  Call: (259) [user] subst_vars(";;            !(unify (a b c) (a b d) ok nok)", _118508, [], _119448)
^  Unify: (259) [user] subst_vars(";;            !(unify (a b c) (a b d) ok nok)", ";;            !(unify (a b c) (a b d) ok nok)", [], [])
   Call: (260) [system] var(";;            !(unify (a b c) (a b d) ok nok)")
^  Redo: (259) [user] subst_vars(";;            !(unify (a b c) (a b d) ok nok)", _118508, [], _119448)
^  Unify: (259) [user] subst_vars(";;            !(unify (a b c) (a b d) ok nok)", _118508, [], _119448)
   Call: (260) [system] atom(";;            !(unify (a b c) (a b d) ok nok)")
^  Redo: (259) [user] subst_vars(";;            !(unify (a b c) (a b d) ok nok)", _118508, [], _119448)
^  Unify: (259) [user] subst_vars(";;            !(unify (a b c) (a b d) ok nok)", _118508, [], _119448)
   Call: (260) [system] compound(";;            !(unify (a b c) (a b d) ok nok)")
^  Redo: (259) [user] subst_vars(";;            !(unify (a b c) (a b d) ok nok)", _118508, [], _119448)
^  Unify: (259) [user] subst_vars(";;            !(unify (a b c) (a b d) ok nok)", ";;            !(unify (a b c) (a b d) ok nok)", [], [])
^  Exit: (259) [user] subst_vars(";;            !(unify (a b c) (a b d) ok nok)", ";;            !(unify (a b c) (a b d) ok nok)", [], [])
^  Call: (259) [user] subst_vars([1439, 0], _118510, [], _103572)
^  Unify: (259) [user] subst_vars([1439, 0], [1439, 0], [], [])
   Call: (260) [system] var([1439, 0])
^  Redo: (259) [user] subst_vars([1439, 0], _118510, [], _103572)
^  Unify: (259) [user] subst_vars([1439, 0], [_134380|_134382], [], _103572)
^  Call: (260) [user] subst_vars(1439, _134380, [], _135320)
^  Unify: (260) [user] subst_vars(1439, 1439, [], [])
   Call: (261) [system] var(1439)
^  Redo: (260) [user] subst_vars(1439, _134380, [], _135320)
^  Unify: (260) [user] subst_vars(1439, _134380, [], _135320)
   Call: (261) [system] atom(1439)
^  Redo: (260) [user] subst_vars(1439, _134380, [], _135320)
^  Unify: (260) [user] subst_vars(1439, _134380, [], _135320)
   Call: (261) [system] compound(1439)
^  Redo: (260) [user] subst_vars(1439, _134380, [], _135320)
^  Unify: (260) [user] subst_vars(1439, 1439, [], [])
^  Exit: (260) [user] subst_vars(1439, 1439, [], [])
^  Call: (260) [user] subst_vars([0], _134382, [], _103572)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _134382, [], _103572)
^  Unify: (260) [user] subst_vars([0], [_150252|_150254], [], _103572)
^  Call: (261) [user] subst_vars(0, _150252, [], _151192)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _150252, [], _151192)
^  Unify: (261) [user] subst_vars(0, _150252, [], _151192)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _150252, [], _151192)
^  Unify: (261) [user] subst_vars(0, _150252, [], _151192)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _150252, [], _151192)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _150254, [], _103572)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _150254, [], _103572)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1439, 0], [1439, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            !(unify (a b c) (a b d) ok nok)", 1439, 0], [";;            !(unify (a b c) (a b d) ok nok)", 1439, 0], [], [])
   Call: (258) [system] compound_name_arguments(_103570, '$COMMENT', [";;            !(unify (a b c) (a b d) ok nok)", 1439, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT', [";;            !(unify (a b c) (a b d) ok nok)", 1439, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), [], [])
   Call: (257) [system] _173610=metta_file_buffer(+, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify (a b c) (a b d) ok nok)", 1439, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1440, 0, 51598, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$stream_position'(51598, 1440, 0, 51632)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _226336))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _226336))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _226336)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _226336)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _226336)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _226336)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _231948))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _231948))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _231948))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _231948))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _231948)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _231948)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _237534))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _237534))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _237534)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _237534)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _237534)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _237534)
   Call: (270) [system] var('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _237534)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$VAR'(_244994))
   Call: (270) [system] atom('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _237534)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _237534)
   Call: (270) [system] '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _237534)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _237534)
   Call: (270) [system] '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _237534)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _237534)
   Call: (270) [system] '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0)==[_254274, _254280]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _237534)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _237534)
   Call: (270) [system] is_list('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _237534)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _237534)
   Call: (270) [system] string('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _237534)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _237534)
   Call: (270) [system] compound('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _264476, _264478)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT', [";;            !(unify ($x a) (b $x) ok nok)", 1440, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            !(unify ($x a) (b $x) ok nok)", 1440, 0], _268218)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            !(unify ($x a) (b $x) ok nok)", 1440, 0], _268218)
   Call: (271) [apply] apply:maplist_([";;            !(unify ($x a) (b $x) ok nok)", 1440, 0], _268218, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            !(unify ($x a) (b $x) ok nok)", 1440, 0], [_271036|_271038], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            !(unify ($x a) (b $x) ok nok)", _271036)
^  Unify: (272) [user] mfix_vars1(";;            !(unify ($x a) (b $x) ok nok)", _271036)
   Call: (273) [system] var(";;            !(unify ($x a) (b $x) ok nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify ($x a) (b $x) ok nok)", _271036)
^  Unify: (272) [user] mfix_vars1(";;            !(unify ($x a) (b $x) ok nok)", '$VAR'(_275682))
   Call: (273) [system] atom(";;            !(unify ($x a) (b $x) ok nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify ($x a) (b $x) ok nok)", _271036)
^  Unify: (272) [user] mfix_vars1(";;            !(unify ($x a) (b $x) ok nok)", _271036)
   Call: (273) [system] ";;            !(unify ($x a) (b $x) ok nok)"==true
^  Redo: (272) [user] mfix_vars1(";;            !(unify ($x a) (b $x) ok nok)", _271036)
^  Unify: (272) [user] mfix_vars1(";;            !(unify ($x a) (b $x) ok nok)", _271036)
   Call: (273) [system] ";;            !(unify ($x a) (b $x) ok nok)"==false
^  Redo: (272) [user] mfix_vars1(";;            !(unify ($x a) (b $x) ok nok)", _271036)
^  Unify: (272) [user] mfix_vars1(";;            !(unify ($x a) (b $x) ok nok)", _271036)
   Call: (273) [system] ";;            !(unify ($x a) (b $x) ok nok)"==[_284962, _284968]
^  Redo: (272) [user] mfix_vars1(";;            !(unify ($x a) (b $x) ok nok)", _271036)
^  Unify: (272) [user] mfix_vars1(";;            !(unify ($x a) (b $x) ok nok)", _271036)
   Call: (273) [system] is_list(";;            !(unify ($x a) (b $x) ok nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify ($x a) (b $x) ok nok)", _271036)
^  Unify: (272) [user] mfix_vars1(";;            !(unify ($x a) (b $x) ok nok)", _271036)
   Call: (273) [system] string(";;            !(unify ($x a) (b $x) ok nok)")
   Exit: (273) [system] string(";;            !(unify ($x a) (b $x) ok nok)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            !(unify ($x a) (b $x) ok nok)", _271036)
^  Unify: (272) [user] mfix_vars1(";;            !(unify ($x a) (b $x) ok nok)", _271036)
   Call: (273) [system] compound(";;            !(unify ($x a) (b $x) ok nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify ($x a) (b $x) ok nok)", _271036)
^  Unify: (272) [user] mfix_vars1(";;            !(unify ($x a) (b $x) ok nok)", _271036)
^  Call: (273) [user] symbol(";;            !(unify ($x a) (b $x) ok nok)")
^  Unify: (273) [user] symbol(";;            !(unify ($x a) (b $x) ok nok)")
   Call: (274) [system] atom(";;            !(unify ($x a) (b $x) ok nok)")
   Fail: (274) [system] atom(";;            !(unify ($x a) (b $x) ok nok)")
^  Fail: (273) [user] symbol(";;            !(unify ($x a) (b $x) ok nok)")
^  Redo: (272) [user] mfix_vars1(";;            !(unify ($x a) (b $x) ok nok)", _271036)
   Call: (273) [system] ";;            !(unify ($x a) (b $x) ok nok)"=_271036
   Exit: (273) [system] ";;            !(unify ($x a) (b $x) ok nok)"=";;            !(unify ($x a) (b $x) ok nok)"
^  Exit: (272) [user] mfix_vars1(";;            !(unify ($x a) (b $x) ok nok)", ";;            !(unify ($x a) (b $x) ok nok)")
   Call: (272) [apply] apply:maplist_([1440, 0], _271038, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1440, 0], [_309034|_309036], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1440, _309034)
^  Unify: (273) [user] mfix_vars1(1440, _309034)
   Call: (274) [system] var(1440)
^  Redo: (273) [user] mfix_vars1(1440, _309034)
^  Unify: (273) [user] mfix_vars1(1440, '$VAR'(_313680))
   Call: (274) [system] atom(1440)
^  Redo: (273) [user] mfix_vars1(1440, _309034)
^  Unify: (273) [user] mfix_vars1(1440, _309034)
   Call: (274) [system] 1440==true
^  Redo: (273) [user] mfix_vars1(1440, _309034)
^  Unify: (273) [user] mfix_vars1(1440, _309034)
   Call: (274) [system] 1440==false
^  Redo: (273) [user] mfix_vars1(1440, _309034)
^  Unify: (273) [user] mfix_vars1(1440, _309034)
   Call: (274) [system] 1440==[_322960, _322966]
^  Redo: (273) [user] mfix_vars1(1440, _309034)
^  Unify: (273) [user] mfix_vars1(1440, _309034)
   Call: (274) [system] is_list(1440)
^  Redo: (273) [user] mfix_vars1(1440, _309034)
^  Unify: (273) [user] mfix_vars1(1440, _309034)
   Call: (274) [system] string(1440)
^  Redo: (273) [user] mfix_vars1(1440, _309034)
^  Unify: (273) [user] mfix_vars1(1440, _309034)
   Call: (274) [system] compound(1440)
^  Redo: (273) [user] mfix_vars1(1440, _309034)
^  Unify: (273) [user] mfix_vars1(1440, _309034)
^  Call: (274) [user] symbol(1440)
^  Unify: (274) [user] symbol(1440)
   Call: (275) [system] atom(1440)
   Fail: (275) [system] atom(1440)
^  Fail: (274) [user] symbol(1440)
^  Redo: (273) [user] mfix_vars1(1440, _309034)
   Call: (274) [system] 1440=_309034
   Exit: (274) [system] 1440=1440
^  Exit: (273) [user] mfix_vars1(1440, 1440)
   Call: (273) [apply] apply:maplist_([0], _309036, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_343360|_343362], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _343360)
^  Unify: (274) [user] mfix_vars1(0, _343360)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _343360)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_348006))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _343360)
^  Unify: (274) [user] mfix_vars1(0, _343360)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _343360)
^  Unify: (274) [user] mfix_vars1(0, _343360)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _343360)
^  Unify: (274) [user] mfix_vars1(0, _343360)
   Call: (275) [system] 0==[_357286, _357292]
^  Redo: (274) [user] mfix_vars1(0, _343360)
^  Unify: (274) [user] mfix_vars1(0, _343360)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _343360)
^  Unify: (274) [user] mfix_vars1(0, _343360)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _343360)
^  Unify: (274) [user] mfix_vars1(0, _343360)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _343360)
^  Unify: (274) [user] mfix_vars1(0, _343360)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _343360)
   Call: (275) [system] 0=_343360
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _343362, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1440, 0], [1440, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            !(unify ($x a) (b $x) ok nok)", 1440, 0], [";;            !(unify ($x a) (b $x) ok nok)", 1440, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            !(unify ($x a) (b $x) ok nok)", 1440, 0], [";;            !(unify ($x a) (b $x) ok nok)", 1440, 0])
   Call: (270) [system] compound_name_arguments(_237534, '$COMMENT', [";;            !(unify ($x a) (b $x) ok nok)", 1440, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT', [";;            !(unify ($x a) (b $x) ok nok)", 1440, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0)\=@='$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _231948)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _393534))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _393534))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _393534))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _393534))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _393534)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _393534)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _399120))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _399120))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _399120)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _399120)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _399120)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0)\=@='$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _393534)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _226336))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _226336))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _226336))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _226336))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _226336)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _226336)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _421440))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _421440))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _421440)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _421440)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _421440)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0)\=@='$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _226336)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0)))
   Call: (261) [system] '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0)\=@='$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _450218, [], _450220)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _450218, [], _450220)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _450218, [], _450220)
   Call: (258) [system] atom('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _450218, [], _450220)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _450218, [], _450220)
   Call: (258) [system] compound('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), _459534, _459536)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT', [";;            !(unify ($x a) (b $x) ok nok)", 1440, 0])
^  Call: (258) [user] subst_vars([";;            !(unify ($x a) (b $x) ok nok)", 1440, 0], _461420, [], _450220)
^  Unify: (258) [user] subst_vars([";;            !(unify ($x a) (b $x) ok nok)", 1440, 0], [";;            !(unify ($x a) (b $x) ok nok)", 1440, 0], [], [])
   Call: (259) [system] var([";;            !(unify ($x a) (b $x) ok nok)", 1440, 0])
^  Redo: (258) [user] subst_vars([";;            !(unify ($x a) (b $x) ok nok)", 1440, 0], _461420, [], _450220)
^  Unify: (258) [user] subst_vars([";;            !(unify ($x a) (b $x) ok nok)", 1440, 0], [_465156|_465158], [], _450220)
^  Call: (259) [user] subst_vars(";;            !(unify ($x a) (b $x) ok nok)", _465156, [], _466096)
^  Unify: (259) [user] subst_vars(";;            !(unify ($x a) (b $x) ok nok)", ";;            !(unify ($x a) (b $x) ok nok)", [], [])
   Call: (260) [system] var(";;            !(unify ($x a) (b $x) ok nok)")
^  Redo: (259) [user] subst_vars(";;            !(unify ($x a) (b $x) ok nok)", _465156, [], _466096)
^  Unify: (259) [user] subst_vars(";;            !(unify ($x a) (b $x) ok nok)", _465156, [], _466096)
   Call: (260) [system] atom(";;            !(unify ($x a) (b $x) ok nok)")
^  Redo: (259) [user] subst_vars(";;            !(unify ($x a) (b $x) ok nok)", _465156, [], _466096)
^  Unify: (259) [user] subst_vars(";;            !(unify ($x a) (b $x) ok nok)", _465156, [], _466096)
   Call: (260) [system] compound(";;            !(unify ($x a) (b $x) ok nok)")
^  Redo: (259) [user] subst_vars(";;            !(unify ($x a) (b $x) ok nok)", _465156, [], _466096)
^  Unify: (259) [user] subst_vars(";;            !(unify ($x a) (b $x) ok nok)", ";;            !(unify ($x a) (b $x) ok nok)", [], [])
^  Exit: (259) [user] subst_vars(";;            !(unify ($x a) (b $x) ok nok)", ";;            !(unify ($x a) (b $x) ok nok)", [], [])
^  Call: (259) [user] subst_vars([1440, 0], _465158, [], _450220)
^  Unify: (259) [user] subst_vars([1440, 0], [1440, 0], [], [])
   Call: (260) [system] var([1440, 0])
^  Redo: (259) [user] subst_vars([1440, 0], _465158, [], _450220)
^  Unify: (259) [user] subst_vars([1440, 0], [_481028|_481030], [], _450220)
^  Call: (260) [user] subst_vars(1440, _481028, [], _481968)
^  Unify: (260) [user] subst_vars(1440, 1440, [], [])
   Call: (261) [system] var(1440)
^  Redo: (260) [user] subst_vars(1440, _481028, [], _481968)
^  Unify: (260) [user] subst_vars(1440, _481028, [], _481968)
   Call: (261) [system] atom(1440)
^  Redo: (260) [user] subst_vars(1440, _481028, [], _481968)
^  Unify: (260) [user] subst_vars(1440, _481028, [], _481968)
   Call: (261) [system] compound(1440)
^  Redo: (260) [user] subst_vars(1440, _481028, [], _481968)
^  Unify: (260) [user] subst_vars(1440, 1440, [], [])
^  Exit: (260) [user] subst_vars(1440, 1440, [], [])
^  Call: (260) [user] subst_vars([0], _481030, [], _450220)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _481030, [], _450220)
^  Unify: (260) [user] subst_vars([0], [_496900|_496902], [], _450220)
^  Call: (261) [user] subst_vars(0, _496900, [], _497840)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _496900, [], _497840)
^  Unify: (261) [user] subst_vars(0, _496900, [], _497840)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _496900, [], _497840)
^  Unify: (261) [user] subst_vars(0, _496900, [], _497840)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _496900, [], _497840)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _496902, [], _450220)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _496902, [], _450220)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1440, 0], [1440, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            !(unify ($x a) (b $x) ok nok)", 1440, 0], [";;            !(unify ($x a) (b $x) ok nok)", 1440, 0], [], [])
   Call: (258) [system] compound_name_arguments(_450218, '$COMMENT', [";;            !(unify ($x a) (b $x) ok nok)", 1440, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT', [";;            !(unify ($x a) (b $x) ok nok)", 1440, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), [], [])
   Call: (257) [system] _520258=metta_file_buffer(+, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(unify ($x a) (b $x) ok nok)", 1440, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1441, 0, 51642, '$COMMENT'(";;        \");", 1441, 0), '$stream_position'(51642, 1441, 0, 51676)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        \");", 1441, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        \");", 1441, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        \");", 1441, 0), _55868))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        \");", 1441, 0), _55868))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        \");", 1441, 0), _55868)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        \");", 1441, 0), _55868)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        \");", 1441, 0), _55868)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        \");", 1441, 0), _55868)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        \");", 1441, 0), _61480))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        \");", 1441, 0), _61480))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        \");", 1441, 0), _61480))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        \");", 1441, 0), _61480))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        \");", 1441, 0), _61480)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        \");", 1441, 0), _61480)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        \");", 1441, 0), _67066))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        \");", 1441, 0), _67066))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        \");", 1441, 0), _67066)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        \");", 1441, 0), _67066)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1441, 0), _67066)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1441, 0), _67066)
   Call: (270) [system] var('$COMMENT'(";;        \");", 1441, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1441, 0), _67066)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1441, 0), '$VAR'(_74526))
   Call: (270) [system] atom('$COMMENT'(";;        \");", 1441, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1441, 0), _67066)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1441, 0), _67066)
   Call: (270) [system] '$COMMENT'(";;        \");", 1441, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1441, 0), _67066)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1441, 0), _67066)
   Call: (270) [system] '$COMMENT'(";;        \");", 1441, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1441, 0), _67066)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1441, 0), _67066)
   Call: (270) [system] '$COMMENT'(";;        \");", 1441, 0)==[_83806, _83812]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1441, 0), _67066)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1441, 0), _67066)
   Call: (270) [system] is_list('$COMMENT'(";;        \");", 1441, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1441, 0), _67066)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1441, 0), _67066)
   Call: (270) [system] string('$COMMENT'(";;        \");", 1441, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1441, 0), _67066)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1441, 0), _67066)
   Call: (270) [system] compound('$COMMENT'(";;        \");", 1441, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        \");", 1441, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        \");", 1441, 0), _94008, _94010)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        \");", 1441, 0), '$COMMENT', [";;        \");", 1441, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        \");", 1441, 0], _97750)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        \");", 1441, 0], _97750)
   Call: (271) [apply] apply:maplist_([";;        \");", 1441, 0], _97750, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        \");", 1441, 0], [_100568|_100570], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        \");", _100568)
^  Unify: (272) [user] mfix_vars1(";;        \");", _100568)
   Call: (273) [system] var(";;        \");")
^  Redo: (272) [user] mfix_vars1(";;        \");", _100568)
^  Unify: (272) [user] mfix_vars1(";;        \");", '$VAR'(_105214))
   Call: (273) [system] atom(";;        \");")
^  Redo: (272) [user] mfix_vars1(";;        \");", _100568)
^  Unify: (272) [user] mfix_vars1(";;        \");", _100568)
   Call: (273) [system] ";;        \");"==true
^  Redo: (272) [user] mfix_vars1(";;        \");", _100568)
^  Unify: (272) [user] mfix_vars1(";;        \");", _100568)
   Call: (273) [system] ";;        \");"==false
^  Redo: (272) [user] mfix_vars1(";;        \");", _100568)
^  Unify: (272) [user] mfix_vars1(";;        \");", _100568)
   Call: (273) [system] ";;        \");"==[_114494, _114500]
^  Redo: (272) [user] mfix_vars1(";;        \");", _100568)
^  Unify: (272) [user] mfix_vars1(";;        \");", _100568)
   Call: (273) [system] is_list(";;        \");")
^  Redo: (272) [user] mfix_vars1(";;        \");", _100568)
^  Unify: (272) [user] mfix_vars1(";;        \");", _100568)
   Call: (273) [system] string(";;        \");")
   Exit: (273) [system] string(";;        \");")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        \");", _100568)
^  Unify: (272) [user] mfix_vars1(";;        \");", _100568)
   Call: (273) [system] compound(";;        \");")
^  Redo: (272) [user] mfix_vars1(";;        \");", _100568)
^  Unify: (272) [user] mfix_vars1(";;        \");", _100568)
^  Call: (273) [user] symbol(";;        \");")
^  Unify: (273) [user] symbol(";;        \");")
   Call: (274) [system] atom(";;        \");")
   Fail: (274) [system] atom(";;        \");")
^  Fail: (273) [user] symbol(";;        \");")
^  Redo: (272) [user] mfix_vars1(";;        \");", _100568)
   Call: (273) [system] ";;        \");"=_100568
   Exit: (273) [system] ";;        \");"=";;        \");"
^  Exit: (272) [user] mfix_vars1(";;        \");", ";;        \");")
   Call: (272) [apply] apply:maplist_([1441, 0], _100570, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1441, 0], [_138566|_138568], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1441, _138566)
^  Unify: (273) [user] mfix_vars1(1441, _138566)
   Call: (274) [system] var(1441)
^  Redo: (273) [user] mfix_vars1(1441, _138566)
^  Unify: (273) [user] mfix_vars1(1441, '$VAR'(_143212))
   Call: (274) [system] atom(1441)
^  Redo: (273) [user] mfix_vars1(1441, _138566)
^  Unify: (273) [user] mfix_vars1(1441, _138566)
   Call: (274) [system] 1441==true
^  Redo: (273) [user] mfix_vars1(1441, _138566)
^  Unify: (273) [user] mfix_vars1(1441, _138566)
   Call: (274) [system] 1441==false
^  Redo: (273) [user] mfix_vars1(1441, _138566)
^  Unify: (273) [user] mfix_vars1(1441, _138566)
   Call: (274) [system] 1441==[_152492, _152498]
^  Redo: (273) [user] mfix_vars1(1441, _138566)
^  Unify: (273) [user] mfix_vars1(1441, _138566)
   Call: (274) [system] is_list(1441)
^  Redo: (273) [user] mfix_vars1(1441, _138566)
^  Unify: (273) [user] mfix_vars1(1441, _138566)
   Call: (274) [system] string(1441)
^  Redo: (273) [user] mfix_vars1(1441, _138566)
^  Unify: (273) [user] mfix_vars1(1441, _138566)
   Call: (274) [system] compound(1441)
^  Redo: (273) [user] mfix_vars1(1441, _138566)
^  Unify: (273) [user] mfix_vars1(1441, _138566)
^  Call: (274) [user] symbol(1441)
^  Unify: (274) [user] symbol(1441)
   Call: (275) [system] atom(1441)
   Fail: (275) [system] atom(1441)
^  Fail: (274) [user] symbol(1441)
^  Redo: (273) [user] mfix_vars1(1441, _138566)
   Call: (274) [system] 1441=_138566
   Exit: (274) [system] 1441=1441
^  Exit: (273) [user] mfix_vars1(1441, 1441)
   Call: (273) [apply] apply:maplist_([0], _138568, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_172892|_172894], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _172892)
^  Unify: (274) [user] mfix_vars1(0, _172892)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _172892)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_177538))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _172892)
^  Unify: (274) [user] mfix_vars1(0, _172892)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _172892)
^  Unify: (274) [user] mfix_vars1(0, _172892)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _172892)
^  Unify: (274) [user] mfix_vars1(0, _172892)
   Call: (275) [system] 0==[_186818, _186824]
^  Redo: (274) [user] mfix_vars1(0, _172892)
^  Unify: (274) [user] mfix_vars1(0, _172892)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _172892)
^  Unify: (274) [user] mfix_vars1(0, _172892)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _172892)
^  Unify: (274) [user] mfix_vars1(0, _172892)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _172892)
^  Unify: (274) [user] mfix_vars1(0, _172892)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _172892)
   Call: (275) [system] 0=_172892
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _172894, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1441, 0], [1441, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        \");", 1441, 0], [";;        \");", 1441, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        \");", 1441, 0], [";;        \");", 1441, 0])
   Call: (270) [system] compound_name_arguments(_67066, '$COMMENT', [";;        \");", 1441, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        \");", 1441, 0), '$COMMENT', [";;        \");", 1441, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0)))
   Call: (267) [system] '$COMMENT'(";;        \");", 1441, 0)\=@='$COMMENT'(";;        \");", 1441, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        \");", 1441, 0), _61480)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        \");", 1441, 0), _223066))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        \");", 1441, 0), _223066))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        \");", 1441, 0), _223066))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        \");", 1441, 0), _223066))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        \");", 1441, 0), _223066)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        \");", 1441, 0), _223066)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        \");", 1441, 0), _228652))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        \");", 1441, 0), _228652))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        \");", 1441, 0), _228652)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        \");", 1441, 0), _228652)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        \");", 1441, 0), _228652)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0)))
   Call: (267) [system] '$COMMENT'(";;        \");", 1441, 0)\=@='$COMMENT'(";;        \");", 1441, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        \");", 1441, 0), _223066)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        \");", 1441, 0), _55868))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        \");", 1441, 0), _55868))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        \");", 1441, 0), _55868))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        \");", 1441, 0), _55868))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        \");", 1441, 0), _55868)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        \");", 1441, 0), _55868)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        \");", 1441, 0), _250972))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        \");", 1441, 0), _250972))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        \");", 1441, 0), _250972)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        \");", 1441, 0), _250972)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        \");", 1441, 0), _250972)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0)))
   Call: (267) [system] '$COMMENT'(";;        \");", 1441, 0)\=@='$COMMENT'(";;        \");", 1441, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        \");", 1441, 0), _55868)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0)))
   Call: (261) [system] '$COMMENT'(";;        \");", 1441, 0)\=@='$COMMENT'(";;        \");", 1441, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        \");", 1441, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        \");", 1441, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        \");", 1441, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        \");", 1441, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        \");", 1441, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        \");", 1441, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        \");", 1441, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        \");", 1441, 0), _279750, [], _279752)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        \");", 1441, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        \");", 1441, 0), _279750, [], _279752)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        \");", 1441, 0), _279750, [], _279752)
   Call: (258) [system] atom('$COMMENT'(";;        \");", 1441, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        \");", 1441, 0), _279750, [], _279752)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        \");", 1441, 0), _279750, [], _279752)
   Call: (258) [system] compound('$COMMENT'(";;        \");", 1441, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        \");", 1441, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        \");", 1441, 0), _289066, _289068)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        \");", 1441, 0), '$COMMENT', [";;        \");", 1441, 0])
^  Call: (258) [user] subst_vars([";;        \");", 1441, 0], _290952, [], _279752)
^  Unify: (258) [user] subst_vars([";;        \");", 1441, 0], [";;        \");", 1441, 0], [], [])
   Call: (259) [system] var([";;        \");", 1441, 0])
^  Redo: (258) [user] subst_vars([";;        \");", 1441, 0], _290952, [], _279752)
^  Unify: (258) [user] subst_vars([";;        \");", 1441, 0], [_294688|_294690], [], _279752)
^  Call: (259) [user] subst_vars(";;        \");", _294688, [], _295628)
^  Unify: (259) [user] subst_vars(";;        \");", ";;        \");", [], [])
   Call: (260) [system] var(";;        \");")
^  Redo: (259) [user] subst_vars(";;        \");", _294688, [], _295628)
^  Unify: (259) [user] subst_vars(";;        \");", _294688, [], _295628)
   Call: (260) [system] atom(";;        \");")
^  Redo: (259) [user] subst_vars(";;        \");", _294688, [], _295628)
^  Unify: (259) [user] subst_vars(";;        \");", _294688, [], _295628)
   Call: (260) [system] compound(";;        \");")
^  Redo: (259) [user] subst_vars(";;        \");", _294688, [], _295628)
^  Unify: (259) [user] subst_vars(";;        \");", ";;        \");", [], [])
^  Exit: (259) [user] subst_vars(";;        \");", ";;        \");", [], [])
^  Call: (259) [user] subst_vars([1441, 0], _294690, [], _279752)
^  Unify: (259) [user] subst_vars([1441, 0], [1441, 0], [], [])
   Call: (260) [system] var([1441, 0])
^  Redo: (259) [user] subst_vars([1441, 0], _294690, [], _279752)
^  Unify: (259) [user] subst_vars([1441, 0], [_310560|_310562], [], _279752)
^  Call: (260) [user] subst_vars(1441, _310560, [], _311500)
^  Unify: (260) [user] subst_vars(1441, 1441, [], [])
   Call: (261) [system] var(1441)
^  Redo: (260) [user] subst_vars(1441, _310560, [], _311500)
^  Unify: (260) [user] subst_vars(1441, _310560, [], _311500)
   Call: (261) [system] atom(1441)
^  Redo: (260) [user] subst_vars(1441, _310560, [], _311500)
^  Unify: (260) [user] subst_vars(1441, _310560, [], _311500)
   Call: (261) [system] compound(1441)
^  Redo: (260) [user] subst_vars(1441, _310560, [], _311500)
^  Unify: (260) [user] subst_vars(1441, 1441, [], [])
^  Exit: (260) [user] subst_vars(1441, 1441, [], [])
^  Call: (260) [user] subst_vars([0], _310562, [], _279752)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _310562, [], _279752)
^  Unify: (260) [user] subst_vars([0], [_326432|_326434], [], _279752)
^  Call: (261) [user] subst_vars(0, _326432, [], _327372)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _326432, [], _327372)
^  Unify: (261) [user] subst_vars(0, _326432, [], _327372)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _326432, [], _327372)
^  Unify: (261) [user] subst_vars(0, _326432, [], _327372)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _326432, [], _327372)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _326434, [], _279752)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _326434, [], _279752)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1441, 0], [1441, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        \");", 1441, 0], [";;        \");", 1441, 0], [], [])
   Call: (258) [system] compound_name_arguments(_279750, '$COMMENT', [";;        \");", 1441, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        \");", 1441, 0), '$COMMENT', [";;        \");", 1441, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        \");", 1441, 0), '$COMMENT'(";;        \");", 1441, 0), [], [])
   Call: (257) [system] _349790=metta_file_buffer(+, '$COMMENT'(";;        \");", 1441, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        \");", 1441, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        \");", 1441, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        \");", 1441, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        \");", 1441, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        \");", 1441, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        \");", 1441, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        \");", 1441, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        \");", 1441, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1442, 0, 51656, '$COMMENT'(";;", 1442, 0), '$stream_position'(51656, 1442, 0, 51690)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1442, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1442, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1442, 0), _402506))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1442, 0), _402506))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1442, 0), _402506)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1442, 0), _402506)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1442, 0), _402506)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1442, 0), _402506)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1442, 0), _408118))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1442, 0), _408118))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1442, 0), _408118))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1442, 0), _408118))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1442, 0), _408118)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1442, 0), _408118)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1442, 0), _413704))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1442, 0), _413704))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1442, 0), _413704)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1442, 0), _413704)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1442, 0), _413704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1442, 0), _413704)
   Call: (270) [system] var('$COMMENT'(";;", 1442, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1442, 0), _413704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1442, 0), '$VAR'(_421164))
   Call: (270) [system] atom('$COMMENT'(";;", 1442, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1442, 0), _413704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1442, 0), _413704)
   Call: (270) [system] '$COMMENT'(";;", 1442, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1442, 0), _413704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1442, 0), _413704)
   Call: (270) [system] '$COMMENT'(";;", 1442, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1442, 0), _413704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1442, 0), _413704)
   Call: (270) [system] '$COMMENT'(";;", 1442, 0)==[_430444, _430450]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1442, 0), _413704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1442, 0), _413704)
   Call: (270) [system] is_list('$COMMENT'(";;", 1442, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1442, 0), _413704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1442, 0), _413704)
   Call: (270) [system] string('$COMMENT'(";;", 1442, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1442, 0), _413704)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1442, 0), _413704)
   Call: (270) [system] compound('$COMMENT'(";;", 1442, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1442, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1442, 0), _440646, _440648)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1442, 0), '$COMMENT', [";;", 1442, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1442, 0], _444388)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1442, 0], _444388)
   Call: (271) [apply] apply:maplist_([";;", 1442, 0], _444388, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1442, 0], [_447206|_447208], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _447206)
^  Unify: (272) [user] mfix_vars1(";;", _447206)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _447206)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_451852))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _447206)
^  Unify: (272) [user] mfix_vars1(";;", _447206)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _447206)
^  Unify: (272) [user] mfix_vars1(";;", _447206)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _447206)
^  Unify: (272) [user] mfix_vars1(";;", _447206)
   Call: (273) [system] ";;"==[_461132, _461138]
^  Redo: (272) [user] mfix_vars1(";;", _447206)
^  Unify: (272) [user] mfix_vars1(";;", _447206)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _447206)
^  Unify: (272) [user] mfix_vars1(";;", _447206)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _447206)
^  Unify: (272) [user] mfix_vars1(";;", _447206)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _447206)
^  Unify: (272) [user] mfix_vars1(";;", _447206)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _447206)
   Call: (273) [system] ";;"=_447206
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1442, 0], _447208, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1442, 0], [_485204|_485206], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1442, _485204)
^  Unify: (273) [user] mfix_vars1(1442, _485204)
   Call: (274) [system] var(1442)
^  Redo: (273) [user] mfix_vars1(1442, _485204)
^  Unify: (273) [user] mfix_vars1(1442, '$VAR'(_489850))
   Call: (274) [system] atom(1442)
^  Redo: (273) [user] mfix_vars1(1442, _485204)
^  Unify: (273) [user] mfix_vars1(1442, _485204)
   Call: (274) [system] 1442==true
^  Redo: (273) [user] mfix_vars1(1442, _485204)
^  Unify: (273) [user] mfix_vars1(1442, _485204)
   Call: (274) [system] 1442==false
^  Redo: (273) [user] mfix_vars1(1442, _485204)
^  Unify: (273) [user] mfix_vars1(1442, _485204)
   Call: (274) [system] 1442==[_499130, _499136]
^  Redo: (273) [user] mfix_vars1(1442, _485204)
^  Unify: (273) [user] mfix_vars1(1442, _485204)
   Call: (274) [system] is_list(1442)
^  Redo: (273) [user] mfix_vars1(1442, _485204)
^  Unify: (273) [user] mfix_vars1(1442, _485204)
   Call: (274) [system] string(1442)
^  Redo: (273) [user] mfix_vars1(1442, _485204)
^  Unify: (273) [user] mfix_vars1(1442, _485204)
   Call: (274) [system] compound(1442)
^  Redo: (273) [user] mfix_vars1(1442, _485204)
^  Unify: (273) [user] mfix_vars1(1442, _485204)
^  Call: (274) [user] symbol(1442)
^  Unify: (274) [user] symbol(1442)
   Call: (275) [system] atom(1442)
   Fail: (275) [system] atom(1442)
^  Fail: (274) [user] symbol(1442)
^  Redo: (273) [user] mfix_vars1(1442, _485204)
   Call: (274) [system] 1442=_485204
   Exit: (274) [system] 1442=1442
^  Exit: (273) [user] mfix_vars1(1442, 1442)
   Call: (273) [apply] apply:maplist_([0], _485206, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_519530|_519532], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _519530)
^  Unify: (274) [user] mfix_vars1(0, _519530)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _519530)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_6042))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _6034)
^  Unify: (274) [user] mfix_vars1(0, _6034)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _6034)
^  Unify: (274) [user] mfix_vars1(0, _6034)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _6034)
^  Unify: (274) [user] mfix_vars1(0, _6034)
   Call: (275) [system] 0==[_15316, _15322]
^  Redo: (274) [user] mfix_vars1(0, _6034)
^  Unify: (274) [user] mfix_vars1(0, _6034)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _6034)
^  Unify: (274) [user] mfix_vars1(0, _6034)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _6034)
^  Unify: (274) [user] mfix_vars1(0, _6034)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _6034)
^  Unify: (274) [user] mfix_vars1(0, _6034)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6034)
   Call: (275) [system] 0=_6034
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6036, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1442, 0], [1442, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1442, 0], [";;", 1442, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1442, 0], [";;", 1442, 0])
   Call: (270) [system] compound_name_arguments(_5976, '$COMMENT', [";;", 1442, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1442, 0), '$COMMENT', [";;", 1442, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1442, 0)\=@='$COMMENT'(";;", 1442, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1442, 0), _5962)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1442, 0), _51564))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1442, 0), _51564))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1442, 0), _51564))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1442, 0), _51564))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1442, 0), _51564)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1442, 0), _51564)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1442, 0), _57150))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1442, 0), _57150))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1442, 0), _57150)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1442, 0), _57150)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1442, 0), _57150)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1442, 0)\=@='$COMMENT'(";;", 1442, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1442, 0), _51564)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1442, 0), _5942))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1442, 0), _5942))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1442, 0), _5942))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1442, 0), _5942))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1442, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1442, 0), _5942)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1442, 0), _79470))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1442, 0), _79470))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1442, 0), _79470)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1442, 0), _79470)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1442, 0), _79470)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1442, 0)\=@='$COMMENT'(";;", 1442, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1442, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1442, 0)\=@='$COMMENT'(";;", 1442, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1442, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1442, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1442, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1442, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1442, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1442, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1442, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1442, 0), _108248, [], _108250)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1442, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1442, 0), _108248, [], _108250)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1442, 0), _108248, [], _108250)
   Call: (258) [system] atom('$COMMENT'(";;", 1442, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1442, 0), _108248, [], _108250)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1442, 0), _108248, [], _108250)
   Call: (258) [system] compound('$COMMENT'(";;", 1442, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1442, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1442, 0), _117564, _117566)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1442, 0), '$COMMENT', [";;", 1442, 0])
^  Call: (258) [user] subst_vars([";;", 1442, 0], _119450, [], _108250)
^  Unify: (258) [user] subst_vars([";;", 1442, 0], [";;", 1442, 0], [], [])
   Call: (259) [system] var([";;", 1442, 0])
^  Redo: (258) [user] subst_vars([";;", 1442, 0], _119450, [], _108250)
^  Unify: (258) [user] subst_vars([";;", 1442, 0], [_123186|_123188], [], _108250)
^  Call: (259) [user] subst_vars(";;", _123186, [], _124126)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _123186, [], _124126)
^  Unify: (259) [user] subst_vars(";;", _123186, [], _124126)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _123186, [], _124126)
^  Unify: (259) [user] subst_vars(";;", _123186, [], _124126)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _123186, [], _124126)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1442, 0], _123188, [], _108250)
^  Unify: (259) [user] subst_vars([1442, 0], [1442, 0], [], [])
   Call: (260) [system] var([1442, 0])
^  Redo: (259) [user] subst_vars([1442, 0], _123188, [], _108250)
^  Unify: (259) [user] subst_vars([1442, 0], [_139058|_139060], [], _108250)
^  Call: (260) [user] subst_vars(1442, _139058, [], _139998)
^  Unify: (260) [user] subst_vars(1442, 1442, [], [])
   Call: (261) [system] var(1442)
^  Redo: (260) [user] subst_vars(1442, _139058, [], _139998)
^  Unify: (260) [user] subst_vars(1442, _139058, [], _139998)
   Call: (261) [system] atom(1442)
^  Redo: (260) [user] subst_vars(1442, _139058, [], _139998)
^  Unify: (260) [user] subst_vars(1442, _139058, [], _139998)
   Call: (261) [system] compound(1442)
^  Redo: (260) [user] subst_vars(1442, _139058, [], _139998)
^  Unify: (260) [user] subst_vars(1442, 1442, [], [])
^  Exit: (260) [user] subst_vars(1442, 1442, [], [])
^  Call: (260) [user] subst_vars([0], _139060, [], _108250)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _139060, [], _108250)
^  Unify: (260) [user] subst_vars([0], [_154930|_154932], [], _108250)
^  Call: (261) [user] subst_vars(0, _154930, [], _155870)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _154930, [], _155870)
^  Unify: (261) [user] subst_vars(0, _154930, [], _155870)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _154930, [], _155870)
^  Unify: (261) [user] subst_vars(0, _154930, [], _155870)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _154930, [], _155870)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _154932, [], _108250)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _154932, [], _108250)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1442, 0], [1442, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1442, 0], [";;", 1442, 0], [], [])
   Call: (258) [system] compound_name_arguments(_108248, '$COMMENT', [";;", 1442, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1442, 0), '$COMMENT', [";;", 1442, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1442, 0), '$COMMENT'(";;", 1442, 0), [], [])
   Call: (257) [system] _178288=metta_file_buffer(+, '$COMMENT'(";;", 1442, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1442, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1442, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1442, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1442, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1442, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1442, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1442, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1442, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1443, 0, 51659, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$stream_position'(51659, 1443, 0, 51693)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _231016))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _231016))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _231016)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _231016)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _231016)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _231016)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _236628))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _236628))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _236628))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _236628))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _236628)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _236628)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _242214))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _242214))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _242214)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _242214)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _242214)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _242214)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _242214)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$VAR'(_249674))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _242214)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _242214)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _242214)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _242214)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _242214)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _242214)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0)==[_258954, _258960]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _242214)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _242214)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _242214)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _242214)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _242214)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _242214)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _269156, _269158)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT', [";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0], _272898)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0], _272898)
   Call: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0], _272898, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0], [_275716|_275718], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _275716)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _275716)
   Call: (273) [system] var(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _275716)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", '$VAR'(_280362))
   Call: (273) [system] atom(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _275716)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _275716)
   Call: (273) [system] ";;        assert_eq_metta_results!(metta.run(parser),"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _275716)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _275716)
   Call: (273) [system] ";;        assert_eq_metta_results!(metta.run(parser),"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _275716)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _275716)
   Call: (273) [system] ";;        assert_eq_metta_results!(metta.run(parser),"==[_289642, _289648]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _275716)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _275716)
   Call: (273) [system] is_list(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _275716)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _275716)
   Call: (273) [system] string(";;        assert_eq_metta_results!(metta.run(parser),")
   Exit: (273) [system] string(";;        assert_eq_metta_results!(metta.run(parser),")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _275716)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _275716)
   Call: (273) [system] compound(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _275716)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _275716)
^  Call: (273) [user] symbol(";;        assert_eq_metta_results!(metta.run(parser),")
^  Unify: (273) [user] symbol(";;        assert_eq_metta_results!(metta.run(parser),")
   Call: (274) [system] atom(";;        assert_eq_metta_results!(metta.run(parser),")
   Fail: (274) [system] atom(";;        assert_eq_metta_results!(metta.run(parser),")
^  Fail: (273) [user] symbol(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _275716)
   Call: (273) [system] ";;        assert_eq_metta_results!(metta.run(parser),"=_275716
   Exit: (273) [system] ";;        assert_eq_metta_results!(metta.run(parser),"=";;        assert_eq_metta_results!(metta.run(parser),"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", ";;        assert_eq_metta_results!(metta.run(parser),")
   Call: (272) [apply] apply:maplist_([1443, 0], _275718, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1443, 0], [_313714|_313716], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1443, _313714)
^  Unify: (273) [user] mfix_vars1(1443, _313714)
   Call: (274) [system] var(1443)
^  Redo: (273) [user] mfix_vars1(1443, _313714)
^  Unify: (273) [user] mfix_vars1(1443, '$VAR'(_318360))
   Call: (274) [system] atom(1443)
^  Redo: (273) [user] mfix_vars1(1443, _313714)
^  Unify: (273) [user] mfix_vars1(1443, _313714)
   Call: (274) [system] 1443==true
^  Redo: (273) [user] mfix_vars1(1443, _313714)
^  Unify: (273) [user] mfix_vars1(1443, _313714)
   Call: (274) [system] 1443==false
^  Redo: (273) [user] mfix_vars1(1443, _313714)
^  Unify: (273) [user] mfix_vars1(1443, _313714)
   Call: (274) [system] 1443==[_327640, _327646]
^  Redo: (273) [user] mfix_vars1(1443, _313714)
^  Unify: (273) [user] mfix_vars1(1443, _313714)
   Call: (274) [system] is_list(1443)
^  Redo: (273) [user] mfix_vars1(1443, _313714)
^  Unify: (273) [user] mfix_vars1(1443, _313714)
   Call: (274) [system] string(1443)
^  Redo: (273) [user] mfix_vars1(1443, _313714)
^  Unify: (273) [user] mfix_vars1(1443, _313714)
   Call: (274) [system] compound(1443)
^  Redo: (273) [user] mfix_vars1(1443, _313714)
^  Unify: (273) [user] mfix_vars1(1443, _313714)
^  Call: (274) [user] symbol(1443)
^  Unify: (274) [user] symbol(1443)
   Call: (275) [system] atom(1443)
   Fail: (275) [system] atom(1443)
^  Fail: (274) [user] symbol(1443)
^  Redo: (273) [user] mfix_vars1(1443, _313714)
   Call: (274) [system] 1443=_313714
   Exit: (274) [system] 1443=1443
^  Exit: (273) [user] mfix_vars1(1443, 1443)
   Call: (273) [apply] apply:maplist_([0], _313716, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_348040|_348042], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _348040)
^  Unify: (274) [user] mfix_vars1(0, _348040)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _348040)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_352686))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _348040)
^  Unify: (274) [user] mfix_vars1(0, _348040)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _348040)
^  Unify: (274) [user] mfix_vars1(0, _348040)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _348040)
^  Unify: (274) [user] mfix_vars1(0, _348040)
   Call: (275) [system] 0==[_361966, _361972]
^  Redo: (274) [user] mfix_vars1(0, _348040)
^  Unify: (274) [user] mfix_vars1(0, _348040)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _348040)
^  Unify: (274) [user] mfix_vars1(0, _348040)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _348040)
^  Unify: (274) [user] mfix_vars1(0, _348040)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _348040)
^  Unify: (274) [user] mfix_vars1(0, _348040)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _348040)
   Call: (275) [system] 0=_348040
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _348042, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1443, 0], [1443, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0], [";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0], [";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0])
   Call: (270) [system] compound_name_arguments(_242214, '$COMMENT', [";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT', [";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _236628)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _398214))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _398214))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _398214))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _398214))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _398214)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _398214)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _403800))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _403800))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _403800)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _403800)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _403800)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _398214)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _231016))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _231016))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _231016))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _231016))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _231016)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _231016)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _426120))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _426120))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _426120)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _426120)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _426120)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _231016)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _454898, [], _454900)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _454898, [], _454900)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _454898, [], _454900)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _454898, [], _454900)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _454898, [], _454900)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), _464214, _464216)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT', [";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0], _466100, [], _454900)
^  Unify: (258) [user] subst_vars([";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0], [";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0], [], [])
   Call: (259) [system] var([";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0], _466100, [], _454900)
^  Unify: (258) [user] subst_vars([";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0], [_469836|_469838], [], _454900)
^  Call: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", _469836, [], _470776)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", ";;        assert_eq_metta_results!(metta.run(parser),", [], [])
   Call: (260) [system] var(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", _469836, [], _470776)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", _469836, [], _470776)
   Call: (260) [system] atom(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", _469836, [], _470776)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", _469836, [], _470776)
   Call: (260) [system] compound(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", _469836, [], _470776)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", ";;        assert_eq_metta_results!(metta.run(parser),", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", ";;        assert_eq_metta_results!(metta.run(parser),", [], [])
^  Call: (259) [user] subst_vars([1443, 0], _469838, [], _454900)
^  Unify: (259) [user] subst_vars([1443, 0], [1443, 0], [], [])
   Call: (260) [system] var([1443, 0])
^  Redo: (259) [user] subst_vars([1443, 0], _469838, [], _454900)
^  Unify: (259) [user] subst_vars([1443, 0], [_485708|_485710], [], _454900)
^  Call: (260) [user] subst_vars(1443, _485708, [], _486648)
^  Unify: (260) [user] subst_vars(1443, 1443, [], [])
   Call: (261) [system] var(1443)
^  Redo: (260) [user] subst_vars(1443, _485708, [], _486648)
^  Unify: (260) [user] subst_vars(1443, _485708, [], _486648)
   Call: (261) [system] atom(1443)
^  Redo: (260) [user] subst_vars(1443, _485708, [], _486648)
^  Unify: (260) [user] subst_vars(1443, _485708, [], _486648)
   Call: (261) [system] compound(1443)
^  Redo: (260) [user] subst_vars(1443, _485708, [], _486648)
^  Unify: (260) [user] subst_vars(1443, 1443, [], [])
^  Exit: (260) [user] subst_vars(1443, 1443, [], [])
^  Call: (260) [user] subst_vars([0], _485710, [], _454900)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _485710, [], _454900)
^  Unify: (260) [user] subst_vars([0], [_501580|_501582], [], _454900)
^  Call: (261) [user] subst_vars(0, _501580, [], _502520)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _501580, [], _502520)
^  Unify: (261) [user] subst_vars(0, _501580, [], _502520)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _501580, [], _502520)
^  Unify: (261) [user] subst_vars(0, _501580, [], _502520)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _501580, [], _502520)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _501582, [], _454900)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _501582, [], _454900)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1443, 0], [1443, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0], [";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0], [], [])
   Call: (258) [system] compound_name_arguments(_454898, '$COMMENT', [";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT', [";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), [], [])
   Call: (257) [system] _6882=metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1443, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1444, 0, 51713, '$COMMENT'(";;            Ok(vec![", 1444, 0), '$stream_position'(51713, 1444, 0, 51747)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![", 1444, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![", 1444, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![", 1444, 0), _59602))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![", 1444, 0), _59602))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![", 1444, 0), _59602)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            Ok(vec![", 1444, 0), _59602)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![", 1444, 0), _59602)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![", 1444, 0), _59602)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1444, 0), _65214))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1444, 0), _65214))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1444, 0), _65214))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1444, 0), _65214))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1444, 0), _65214)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1444, 0), _65214)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1444, 0), _70800))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1444, 0), _70800))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1444, 0), _70800)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1444, 0), _70800)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1444, 0), _70800)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1444, 0), _70800)
   Call: (270) [system] var('$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1444, 0), _70800)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1444, 0), '$VAR'(_78260))
   Call: (270) [system] atom('$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1444, 0), _70800)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1444, 0), _70800)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![", 1444, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1444, 0), _70800)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1444, 0), _70800)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![", 1444, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1444, 0), _70800)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1444, 0), _70800)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![", 1444, 0)==[_87540, _87546]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1444, 0), _70800)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1444, 0), _70800)
   Call: (270) [system] is_list('$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1444, 0), _70800)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1444, 0), _70800)
   Call: (270) [system] string('$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1444, 0), _70800)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1444, 0), _70800)
   Call: (270) [system] compound('$COMMENT'(";;            Ok(vec![", 1444, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            Ok(vec![", 1444, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![", 1444, 0), _97742, _97744)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT', [";;            Ok(vec![", 1444, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            Ok(vec![", 1444, 0], _101484)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            Ok(vec![", 1444, 0], _101484)
   Call: (271) [apply] apply:maplist_([";;            Ok(vec![", 1444, 0], _101484, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            Ok(vec![", 1444, 0], [_104302|_104304], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            Ok(vec![", _104302)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![", _104302)
   Call: (273) [system] var(";;            Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![", _104302)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![", '$VAR'(_108948))
   Call: (273) [system] atom(";;            Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![", _104302)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![", _104302)
   Call: (273) [system] ";;            Ok(vec!["==true
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![", _104302)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![", _104302)
   Call: (273) [system] ";;            Ok(vec!["==false
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![", _104302)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![", _104302)
   Call: (273) [system] ";;            Ok(vec!["==[_118228, _118234]
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![", _104302)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![", _104302)
   Call: (273) [system] is_list(";;            Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![", _104302)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![", _104302)
   Call: (273) [system] string(";;            Ok(vec![")
   Exit: (273) [system] string(";;            Ok(vec![")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![", _104302)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![", _104302)
   Call: (273) [system] compound(";;            Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![", _104302)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![", _104302)
^  Call: (273) [user] symbol(";;            Ok(vec![")
^  Unify: (273) [user] symbol(";;            Ok(vec![")
   Call: (274) [system] atom(";;            Ok(vec![")
   Fail: (274) [system] atom(";;            Ok(vec![")
^  Fail: (273) [user] symbol(";;            Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![", _104302)
   Call: (273) [system] ";;            Ok(vec!["=_104302
   Exit: (273) [system] ";;            Ok(vec!["=";;            Ok(vec!["
^  Exit: (272) [user] mfix_vars1(";;            Ok(vec![", ";;            Ok(vec![")
   Call: (272) [apply] apply:maplist_([1444, 0], _104304, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1444, 0], [_142300|_142302], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1444, _142300)
^  Unify: (273) [user] mfix_vars1(1444, _142300)
   Call: (274) [system] var(1444)
^  Redo: (273) [user] mfix_vars1(1444, _142300)
^  Unify: (273) [user] mfix_vars1(1444, '$VAR'(_146946))
   Call: (274) [system] atom(1444)
^  Redo: (273) [user] mfix_vars1(1444, _142300)
^  Unify: (273) [user] mfix_vars1(1444, _142300)
   Call: (274) [system] 1444==true
^  Redo: (273) [user] mfix_vars1(1444, _142300)
^  Unify: (273) [user] mfix_vars1(1444, _142300)
   Call: (274) [system] 1444==false
^  Redo: (273) [user] mfix_vars1(1444, _142300)
^  Unify: (273) [user] mfix_vars1(1444, _142300)
   Call: (274) [system] 1444==[_156226, _156232]
^  Redo: (273) [user] mfix_vars1(1444, _142300)
^  Unify: (273) [user] mfix_vars1(1444, _142300)
   Call: (274) [system] is_list(1444)
^  Redo: (273) [user] mfix_vars1(1444, _142300)
^  Unify: (273) [user] mfix_vars1(1444, _142300)
   Call: (274) [system] string(1444)
^  Redo: (273) [user] mfix_vars1(1444, _142300)
^  Unify: (273) [user] mfix_vars1(1444, _142300)
   Call: (274) [system] compound(1444)
^  Redo: (273) [user] mfix_vars1(1444, _142300)
^  Unify: (273) [user] mfix_vars1(1444, _142300)
^  Call: (274) [user] symbol(1444)
^  Unify: (274) [user] symbol(1444)
   Call: (275) [system] atom(1444)
   Fail: (275) [system] atom(1444)
^  Fail: (274) [user] symbol(1444)
^  Redo: (273) [user] mfix_vars1(1444, _142300)
   Call: (274) [system] 1444=_142300
   Exit: (274) [system] 1444=1444
^  Exit: (273) [user] mfix_vars1(1444, 1444)
   Call: (273) [apply] apply:maplist_([0], _142302, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_176626|_176628], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _176626)
^  Unify: (274) [user] mfix_vars1(0, _176626)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _176626)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_181272))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _176626)
^  Unify: (274) [user] mfix_vars1(0, _176626)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _176626)
^  Unify: (274) [user] mfix_vars1(0, _176626)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _176626)
^  Unify: (274) [user] mfix_vars1(0, _176626)
   Call: (275) [system] 0==[_190552, _190558]
^  Redo: (274) [user] mfix_vars1(0, _176626)
^  Unify: (274) [user] mfix_vars1(0, _176626)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _176626)
^  Unify: (274) [user] mfix_vars1(0, _176626)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _176626)
^  Unify: (274) [user] mfix_vars1(0, _176626)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _176626)
^  Unify: (274) [user] mfix_vars1(0, _176626)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _176626)
   Call: (275) [system] 0=_176626
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _176628, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1444, 0], [1444, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            Ok(vec![", 1444, 0], [";;            Ok(vec![", 1444, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            Ok(vec![", 1444, 0], [";;            Ok(vec![", 1444, 0])
   Call: (270) [system] compound_name_arguments(_70800, '$COMMENT', [";;            Ok(vec![", 1444, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT', [";;            Ok(vec![", 1444, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![", 1444, 0)\=@='$COMMENT'(";;            Ok(vec![", 1444, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1444, 0), _65214)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1444, 0), _226800))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1444, 0), _226800))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1444, 0), _226800))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1444, 0), _226800))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1444, 0), _226800)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1444, 0), _226800)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1444, 0), _232386))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1444, 0), _232386))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1444, 0), _232386)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            Ok(vec![", 1444, 0), _232386)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![", 1444, 0), _232386)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![", 1444, 0)\=@='$COMMENT'(";;            Ok(vec![", 1444, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1444, 0), _226800)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1444, 0), _59602))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1444, 0), _59602))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1444, 0), _59602))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1444, 0), _59602))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1444, 0), _59602)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1444, 0), _59602)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1444, 0), _254706))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1444, 0), _254706))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1444, 0), _254706)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            Ok(vec![", 1444, 0), _254706)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![", 1444, 0), _254706)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![", 1444, 0)\=@='$COMMENT'(";;            Ok(vec![", 1444, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1444, 0), _59602)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0)))
   Call: (261) [system] '$COMMENT'(";;            Ok(vec![", 1444, 0)\=@='$COMMENT'(";;            Ok(vec![", 1444, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![", 1444, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![", 1444, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![", 1444, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![", 1444, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![", 1444, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![", 1444, 0), _283484, [], _283486)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![", 1444, 0), _283484, [], _283486)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![", 1444, 0), _283484, [], _283486)
   Call: (258) [system] atom('$COMMENT'(";;            Ok(vec![", 1444, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![", 1444, 0), _283484, [], _283486)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![", 1444, 0), _283484, [], _283486)
   Call: (258) [system] compound('$COMMENT'(";;            Ok(vec![", 1444, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            Ok(vec![", 1444, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![", 1444, 0), _292800, _292802)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT', [";;            Ok(vec![", 1444, 0])
^  Call: (258) [user] subst_vars([";;            Ok(vec![", 1444, 0], _294686, [], _283486)
^  Unify: (258) [user] subst_vars([";;            Ok(vec![", 1444, 0], [";;            Ok(vec![", 1444, 0], [], [])
   Call: (259) [system] var([";;            Ok(vec![", 1444, 0])
^  Redo: (258) [user] subst_vars([";;            Ok(vec![", 1444, 0], _294686, [], _283486)
^  Unify: (258) [user] subst_vars([";;            Ok(vec![", 1444, 0], [_298422|_298424], [], _283486)
^  Call: (259) [user] subst_vars(";;            Ok(vec![", _298422, [], _299362)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![", ";;            Ok(vec![", [], [])
   Call: (260) [system] var(";;            Ok(vec![")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![", _298422, [], _299362)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![", _298422, [], _299362)
   Call: (260) [system] atom(";;            Ok(vec![")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![", _298422, [], _299362)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![", _298422, [], _299362)
   Call: (260) [system] compound(";;            Ok(vec![")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![", _298422, [], _299362)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![", ";;            Ok(vec![", [], [])
^  Exit: (259) [user] subst_vars(";;            Ok(vec![", ";;            Ok(vec![", [], [])
^  Call: (259) [user] subst_vars([1444, 0], _298424, [], _283486)
^  Unify: (259) [user] subst_vars([1444, 0], [1444, 0], [], [])
   Call: (260) [system] var([1444, 0])
^  Redo: (259) [user] subst_vars([1444, 0], _298424, [], _283486)
^  Unify: (259) [user] subst_vars([1444, 0], [_314294|_314296], [], _283486)
^  Call: (260) [user] subst_vars(1444, _314294, [], _315234)
^  Unify: (260) [user] subst_vars(1444, 1444, [], [])
   Call: (261) [system] var(1444)
^  Redo: (260) [user] subst_vars(1444, _314294, [], _315234)
^  Unify: (260) [user] subst_vars(1444, _314294, [], _315234)
   Call: (261) [system] atom(1444)
^  Redo: (260) [user] subst_vars(1444, _314294, [], _315234)
^  Unify: (260) [user] subst_vars(1444, _314294, [], _315234)
   Call: (261) [system] compound(1444)
^  Redo: (260) [user] subst_vars(1444, _314294, [], _315234)
^  Unify: (260) [user] subst_vars(1444, 1444, [], [])
^  Exit: (260) [user] subst_vars(1444, 1444, [], [])
^  Call: (260) [user] subst_vars([0], _314296, [], _283486)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _314296, [], _283486)
^  Unify: (260) [user] subst_vars([0], [_330166|_330168], [], _283486)
^  Call: (261) [user] subst_vars(0, _330166, [], _331106)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _330166, [], _331106)
^  Unify: (261) [user] subst_vars(0, _330166, [], _331106)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _330166, [], _331106)
^  Unify: (261) [user] subst_vars(0, _330166, [], _331106)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _330166, [], _331106)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _330168, [], _283486)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _330168, [], _283486)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1444, 0], [1444, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            Ok(vec![", 1444, 0], [";;            Ok(vec![", 1444, 0], [], [])
   Call: (258) [system] compound_name_arguments(_283484, '$COMMENT', [";;            Ok(vec![", 1444, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT', [";;            Ok(vec![", 1444, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![", 1444, 0), '$COMMENT'(";;            Ok(vec![", 1444, 0), [], [])
   Call: (257) [system] _353524=metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![", 1444, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![", 1444, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![", 1444, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![", 1444, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![", 1444, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![", 1444, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![", 1444, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![", 1444, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![", 1444, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1445, 0, 51736, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$stream_position'(51736, 1445, 0, 51770)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _406248))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _406248))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _406248)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _406248)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _406248)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _406248)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _411860))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _411860))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _411860))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _411860))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _411860)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _411860)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _417446))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _417446))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _417446)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _417446)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _417446)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _417446)
   Call: (270) [system] var('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _417446)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$VAR'(_424906))
   Call: (270) [system] atom('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _417446)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _417446)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _417446)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _417446)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _417446)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _417446)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0)==[_434186, _434192]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _417446)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _417446)
   Call: (270) [system] is_list('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _417446)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _417446)
   Call: (270) [system] string('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _417446)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _417446)
   Call: (270) [system] compound('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
   Exit: (270) [system] compound('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _444388, _444390)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT', [";;                vec![expr!(\"ok\")],", 1445, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;                vec![expr!(\"ok\")],", 1445, 0], _448130)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;                vec![expr!(\"ok\")],", 1445, 0], _448130)
   Call: (271) [apply] apply:maplist_([";;                vec![expr!(\"ok\")],", 1445, 0], _448130, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;                vec![expr!(\"ok\")],", 1445, 0], [_450948|_450950], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\")],", _450948)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\")],", _450948)
   Call: (273) [system] var(";;                vec![expr!(\"ok\")],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\")],", _450948)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\")],", '$VAR'(_455594))
   Call: (273) [system] atom(";;                vec![expr!(\"ok\")],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\")],", _450948)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\")],", _450948)
   Call: (273) [system] ";;                vec![expr!(\"ok\")],"==true
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\")],", _450948)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\")],", _450948)
   Call: (273) [system] ";;                vec![expr!(\"ok\")],"==false
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\")],", _450948)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\")],", _450948)
   Call: (273) [system] ";;                vec![expr!(\"ok\")],"==[_464874, _464880]
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\")],", _450948)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\")],", _450948)
   Call: (273) [system] is_list(";;                vec![expr!(\"ok\")],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\")],", _450948)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\")],", _450948)
   Call: (273) [system] string(";;                vec![expr!(\"ok\")],")
   Exit: (273) [system] string(";;                vec![expr!(\"ok\")],")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\")],", _450948)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\")],", _450948)
   Call: (273) [system] compound(";;                vec![expr!(\"ok\")],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\")],", _450948)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\")],", _450948)
^  Call: (273) [user] symbol(";;                vec![expr!(\"ok\")],")
^  Unify: (273) [user] symbol(";;                vec![expr!(\"ok\")],")
   Call: (274) [system] atom(";;                vec![expr!(\"ok\")],")
   Fail: (274) [system] atom(";;                vec![expr!(\"ok\")],")
^  Fail: (273) [user] symbol(";;                vec![expr!(\"ok\")],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\")],", _450948)
   Call: (273) [system] ";;                vec![expr!(\"ok\")],"=_450948
   Exit: (273) [system] ";;                vec![expr!(\"ok\")],"=";;                vec![expr!(\"ok\")],"
^  Exit: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\")],", ";;                vec![expr!(\"ok\")],")
   Call: (272) [apply] apply:maplist_([1445, 0], _450950, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1445, 0], [_488946|_488948], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1445, _488946)
^  Unify: (273) [user] mfix_vars1(1445, _488946)
   Call: (274) [system] var(1445)
^  Redo: (273) [user] mfix_vars1(1445, _488946)
^  Unify: (273) [user] mfix_vars1(1445, '$VAR'(_493592))
   Call: (274) [system] atom(1445)
^  Redo: (273) [user] mfix_vars1(1445, _488946)
^  Unify: (273) [user] mfix_vars1(1445, _488946)
   Call: (274) [system] 1445==true
^  Redo: (273) [user] mfix_vars1(1445, _488946)
^  Unify: (273) [user] mfix_vars1(1445, _488946)
   Call: (274) [system] 1445==false
^  Redo: (273) [user] mfix_vars1(1445, _488946)
^  Unify: (273) [user] mfix_vars1(1445, _488946)
   Call: (274) [system] 1445==[_502872, _502878]
^  Redo: (273) [user] mfix_vars1(1445, _488946)
^  Unify: (273) [user] mfix_vars1(1445, _488946)
   Call: (274) [system] is_list(1445)
^  Redo: (273) [user] mfix_vars1(1445, _488946)
^  Unify: (273) [user] mfix_vars1(1445, _488946)
   Call: (274) [system] string(1445)
^  Redo: (273) [user] mfix_vars1(1445, _488946)
^  Unify: (273) [user] mfix_vars1(1445, _488946)
   Call: (274) [system] compound(1445)
^  Redo: (273) [user] mfix_vars1(1445, _488946)
^  Unify: (273) [user] mfix_vars1(1445, _488946)
^  Call: (274) [user] symbol(1445)
^  Unify: (274) [user] symbol(1445)
   Call: (275) [system] atom(1445)
   Fail: (275) [system] atom(1445)
^  Fail: (274) [user] symbol(1445)
^  Redo: (273) [user] mfix_vars1(1445, _488946)
   Call: (274) [system] 1445=_488946
   Exit: (274) [system] 1445=1445
^  Exit: (273) [user] mfix_vars1(1445, 1445)
   Call: (273) [apply] apply:maplist_([0], _488948, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_6044|_6046], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _6044)
^  Unify: (274) [user] mfix_vars1(0, _6044)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _6044)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_10116))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _6044)
^  Unify: (274) [user] mfix_vars1(0, _6044)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _6044)
^  Unify: (274) [user] mfix_vars1(0, _6044)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _6044)
^  Unify: (274) [user] mfix_vars1(0, _6044)
   Call: (275) [system] 0==[_19396, _19402]
^  Redo: (274) [user] mfix_vars1(0, _6044)
^  Unify: (274) [user] mfix_vars1(0, _6044)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _6044)
^  Unify: (274) [user] mfix_vars1(0, _6044)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _6044)
^  Unify: (274) [user] mfix_vars1(0, _6044)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _6044)
^  Unify: (274) [user] mfix_vars1(0, _6044)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6044)
   Call: (275) [system] 0=_6044
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6046, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1445, 0], [1445, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;                vec![expr!(\"ok\")],", 1445, 0], [";;                vec![expr!(\"ok\")],", 1445, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;                vec![expr!(\"ok\")],", 1445, 0], [";;                vec![expr!(\"ok\")],", 1445, 0])
   Call: (270) [system] compound_name_arguments(_5984, '$COMMENT', [";;                vec![expr!(\"ok\")],", 1445, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT', [";;                vec![expr!(\"ok\")],", 1445, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0)\=@='$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _5970)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _55644))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _55644))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _55644))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _55644))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _55644)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _55644)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _61230))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _61230))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _61230)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _61230)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _61230)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0)\=@='$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _55644)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _83550))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _83550))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _83550)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _83550)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _83550)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0)\=@='$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0)))
   Call: (261) [system] '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0)\=@='$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _112328, [], _112330)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _112328, [], _112330)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _112328, [], _112330)
   Call: (258) [system] atom('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _112328, [], _112330)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _112328, [], _112330)
   Call: (258) [system] compound('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
   Exit: (258) [system] compound('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), _121644, _121646)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT', [";;                vec![expr!(\"ok\")],", 1445, 0])
^  Call: (258) [user] subst_vars([";;                vec![expr!(\"ok\")],", 1445, 0], _123530, [], _112330)
^  Unify: (258) [user] subst_vars([";;                vec![expr!(\"ok\")],", 1445, 0], [";;                vec![expr!(\"ok\")],", 1445, 0], [], [])
   Call: (259) [system] var([";;                vec![expr!(\"ok\")],", 1445, 0])
^  Redo: (258) [user] subst_vars([";;                vec![expr!(\"ok\")],", 1445, 0], _123530, [], _112330)
^  Unify: (258) [user] subst_vars([";;                vec![expr!(\"ok\")],", 1445, 0], [_127266|_127268], [], _112330)
^  Call: (259) [user] subst_vars(";;                vec![expr!(\"ok\")],", _127266, [], _128206)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"ok\")],", ";;                vec![expr!(\"ok\")],", [], [])
   Call: (260) [system] var(";;                vec![expr!(\"ok\")],")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"ok\")],", _127266, [], _128206)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"ok\")],", _127266, [], _128206)
   Call: (260) [system] atom(";;                vec![expr!(\"ok\")],")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"ok\")],", _127266, [], _128206)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"ok\")],", _127266, [], _128206)
   Call: (260) [system] compound(";;                vec![expr!(\"ok\")],")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"ok\")],", _127266, [], _128206)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"ok\")],", ";;                vec![expr!(\"ok\")],", [], [])
^  Exit: (259) [user] subst_vars(";;                vec![expr!(\"ok\")],", ";;                vec![expr!(\"ok\")],", [], [])
^  Call: (259) [user] subst_vars([1445, 0], _127268, [], _112330)
^  Unify: (259) [user] subst_vars([1445, 0], [1445, 0], [], [])
   Call: (260) [system] var([1445, 0])
^  Redo: (259) [user] subst_vars([1445, 0], _127268, [], _112330)
^  Unify: (259) [user] subst_vars([1445, 0], [_143138|_143140], [], _112330)
^  Call: (260) [user] subst_vars(1445, _143138, [], _144078)
^  Unify: (260) [user] subst_vars(1445, 1445, [], [])
   Call: (261) [system] var(1445)
^  Redo: (260) [user] subst_vars(1445, _143138, [], _144078)
^  Unify: (260) [user] subst_vars(1445, _143138, [], _144078)
   Call: (261) [system] atom(1445)
^  Redo: (260) [user] subst_vars(1445, _143138, [], _144078)
^  Unify: (260) [user] subst_vars(1445, _143138, [], _144078)
   Call: (261) [system] compound(1445)
^  Redo: (260) [user] subst_vars(1445, _143138, [], _144078)
^  Unify: (260) [user] subst_vars(1445, 1445, [], [])
^  Exit: (260) [user] subst_vars(1445, 1445, [], [])
^  Call: (260) [user] subst_vars([0], _143140, [], _112330)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _143140, [], _112330)
^  Unify: (260) [user] subst_vars([0], [_159010|_159012], [], _112330)
^  Call: (261) [user] subst_vars(0, _159010, [], _159950)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _159010, [], _159950)
^  Unify: (261) [user] subst_vars(0, _159010, [], _159950)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _159010, [], _159950)
^  Unify: (261) [user] subst_vars(0, _159010, [], _159950)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _159010, [], _159950)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _159012, [], _112330)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _159012, [], _112330)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1445, 0], [1445, 0], [], [])
^  Exit: (258) [user] subst_vars([";;                vec![expr!(\"ok\")],", 1445, 0], [";;                vec![expr!(\"ok\")],", 1445, 0], [], [])
   Call: (258) [system] compound_name_arguments(_112328, '$COMMENT', [";;                vec![expr!(\"ok\")],", 1445, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT', [";;                vec![expr!(\"ok\")],", 1445, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), [], [])
   Call: (257) [system] _182368=metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\")],", 1445, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1446, 0, 51773, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$stream_position'(51773, 1446, 0, 51807)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _235094))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _235094))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _235094)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _235094)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _235094)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _235094)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _240706))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _240706))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _240706))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _240706))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _240706)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _240706)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _246292))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _246292))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _246292)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _246292)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _246292)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _246292)
   Call: (270) [system] var('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _246292)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$VAR'(_253752))
   Call: (270) [system] atom('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _246292)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _246292)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _246292)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _246292)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _246292)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _246292)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0)==[_263032, _263038]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _246292)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _246292)
   Call: (270) [system] is_list('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _246292)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _246292)
   Call: (270) [system] string('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _246292)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _246292)
   Call: (270) [system] compound('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
   Exit: (270) [system] compound('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _273234, _273236)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT', [";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0], _276976)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0], _276976)
   Call: (271) [apply] apply:maplist_([";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0], _276976, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0], [_279794|_279796], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _279794)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _279794)
   Call: (273) [system] var(";;                vec![expr!(\"ok\" \"b\" \"c\")],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _279794)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" \"b\" \"c\")],", '$VAR'(_284440))
   Call: (273) [system] atom(";;                vec![expr!(\"ok\" \"b\" \"c\")],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _279794)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _279794)
   Call: (273) [system] ";;                vec![expr!(\"ok\" \"b\" \"c\")],"==true
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _279794)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _279794)
   Call: (273) [system] ";;                vec![expr!(\"ok\" \"b\" \"c\")],"==false
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _279794)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _279794)
   Call: (273) [system] ";;                vec![expr!(\"ok\" \"b\" \"c\")],"==[_293720, _293726]
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _279794)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _279794)
   Call: (273) [system] is_list(";;                vec![expr!(\"ok\" \"b\" \"c\")],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _279794)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _279794)
   Call: (273) [system] string(";;                vec![expr!(\"ok\" \"b\" \"c\")],")
   Exit: (273) [system] string(";;                vec![expr!(\"ok\" \"b\" \"c\")],")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _279794)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _279794)
   Call: (273) [system] compound(";;                vec![expr!(\"ok\" \"b\" \"c\")],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _279794)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _279794)
^  Call: (273) [user] symbol(";;                vec![expr!(\"ok\" \"b\" \"c\")],")
^  Unify: (273) [user] symbol(";;                vec![expr!(\"ok\" \"b\" \"c\")],")
   Call: (274) [system] atom(";;                vec![expr!(\"ok\" \"b\" \"c\")],")
   Fail: (274) [system] atom(";;                vec![expr!(\"ok\" \"b\" \"c\")],")
^  Fail: (273) [user] symbol(";;                vec![expr!(\"ok\" \"b\" \"c\")],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _279794)
   Call: (273) [system] ";;                vec![expr!(\"ok\" \"b\" \"c\")],"=_279794
   Exit: (273) [system] ";;                vec![expr!(\"ok\" \"b\" \"c\")],"=";;                vec![expr!(\"ok\" \"b\" \"c\")],"
^  Exit: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" \"b\" \"c\")],", ";;                vec![expr!(\"ok\" \"b\" \"c\")],")
   Call: (272) [apply] apply:maplist_([1446, 0], _279796, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1446, 0], [_317792|_317794], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1446, _317792)
^  Unify: (273) [user] mfix_vars1(1446, _317792)
   Call: (274) [system] var(1446)
^  Redo: (273) [user] mfix_vars1(1446, _317792)
^  Unify: (273) [user] mfix_vars1(1446, '$VAR'(_322438))
   Call: (274) [system] atom(1446)
^  Redo: (273) [user] mfix_vars1(1446, _317792)
^  Unify: (273) [user] mfix_vars1(1446, _317792)
   Call: (274) [system] 1446==true
^  Redo: (273) [user] mfix_vars1(1446, _317792)
^  Unify: (273) [user] mfix_vars1(1446, _317792)
   Call: (274) [system] 1446==false
^  Redo: (273) [user] mfix_vars1(1446, _317792)
^  Unify: (273) [user] mfix_vars1(1446, _317792)
   Call: (274) [system] 1446==[_331718, _331724]
^  Redo: (273) [user] mfix_vars1(1446, _317792)
^  Unify: (273) [user] mfix_vars1(1446, _317792)
   Call: (274) [system] is_list(1446)
^  Redo: (273) [user] mfix_vars1(1446, _317792)
^  Unify: (273) [user] mfix_vars1(1446, _317792)
   Call: (274) [system] string(1446)
^  Redo: (273) [user] mfix_vars1(1446, _317792)
^  Unify: (273) [user] mfix_vars1(1446, _317792)
   Call: (274) [system] compound(1446)
^  Redo: (273) [user] mfix_vars1(1446, _317792)
^  Unify: (273) [user] mfix_vars1(1446, _317792)
^  Call: (274) [user] symbol(1446)
^  Unify: (274) [user] symbol(1446)
   Call: (275) [system] atom(1446)
   Fail: (275) [system] atom(1446)
^  Fail: (274) [user] symbol(1446)
^  Redo: (273) [user] mfix_vars1(1446, _317792)
   Call: (274) [system] 1446=_317792
   Exit: (274) [system] 1446=1446
^  Exit: (273) [user] mfix_vars1(1446, 1446)
   Call: (273) [apply] apply:maplist_([0], _317794, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_352118|_352120], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _352118)
^  Unify: (274) [user] mfix_vars1(0, _352118)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _352118)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_356764))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _352118)
^  Unify: (274) [user] mfix_vars1(0, _352118)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _352118)
^  Unify: (274) [user] mfix_vars1(0, _352118)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _352118)
^  Unify: (274) [user] mfix_vars1(0, _352118)
   Call: (275) [system] 0==[_366044, _366050]
^  Redo: (274) [user] mfix_vars1(0, _352118)
^  Unify: (274) [user] mfix_vars1(0, _352118)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _352118)
^  Unify: (274) [user] mfix_vars1(0, _352118)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _352118)
^  Unify: (274) [user] mfix_vars1(0, _352118)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _352118)
^  Unify: (274) [user] mfix_vars1(0, _352118)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _352118)
   Call: (275) [system] 0=_352118
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _352120, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1446, 0], [1446, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0], [";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0], [";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0])
   Call: (270) [system] compound_name_arguments(_246292, '$COMMENT', [";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT', [";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0)\=@='$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _240706)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _402292))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _402292))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _402292))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _402292))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _402292)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _402292)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _407878))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _407878))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _407878)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _407878)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _407878)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0)\=@='$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _402292)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _235094))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _235094))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _235094))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _235094))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _235094)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _235094)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _430198))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _430198))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _430198)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _430198)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _430198)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0)\=@='$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _235094)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0)))
   Call: (261) [system] '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0)\=@='$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _458976, [], _458978)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _458976, [], _458978)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _458976, [], _458978)
   Call: (258) [system] atom('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _458976, [], _458978)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _458976, [], _458978)
   Call: (258) [system] compound('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
   Exit: (258) [system] compound('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), _468292, _468294)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT', [";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0])
^  Call: (258) [user] subst_vars([";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0], _470178, [], _458978)
^  Unify: (258) [user] subst_vars([";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0], [";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0], [], [])
   Call: (259) [system] var([";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0])
^  Redo: (258) [user] subst_vars([";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0], _470178, [], _458978)
^  Unify: (258) [user] subst_vars([";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0], [_473914|_473916], [], _458978)
^  Call: (259) [user] subst_vars(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _473914, [], _474854)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"ok\" \"b\" \"c\")],", ";;                vec![expr!(\"ok\" \"b\" \"c\")],", [], [])
   Call: (260) [system] var(";;                vec![expr!(\"ok\" \"b\" \"c\")],")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _473914, [], _474854)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _473914, [], _474854)
   Call: (260) [system] atom(";;                vec![expr!(\"ok\" \"b\" \"c\")],")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _473914, [], _474854)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _473914, [], _474854)
   Call: (260) [system] compound(";;                vec![expr!(\"ok\" \"b\" \"c\")],")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"ok\" \"b\" \"c\")],", _473914, [], _474854)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"ok\" \"b\" \"c\")],", ";;                vec![expr!(\"ok\" \"b\" \"c\")],", [], [])
^  Exit: (259) [user] subst_vars(";;                vec![expr!(\"ok\" \"b\" \"c\")],", ";;                vec![expr!(\"ok\" \"b\" \"c\")],", [], [])
^  Call: (259) [user] subst_vars([1446, 0], _473916, [], _458978)
^  Unify: (259) [user] subst_vars([1446, 0], [1446, 0], [], [])
   Call: (260) [system] var([1446, 0])
^  Redo: (259) [user] subst_vars([1446, 0], _473916, [], _458978)
^  Unify: (259) [user] subst_vars([1446, 0], [_489786|_489788], [], _458978)
^  Call: (260) [user] subst_vars(1446, _489786, [], _490726)
^  Unify: (260) [user] subst_vars(1446, 1446, [], [])
   Call: (261) [system] var(1446)
^  Redo: (260) [user] subst_vars(1446, _489786, [], _490726)
^  Unify: (260) [user] subst_vars(1446, _489786, [], _490726)
   Call: (261) [system] atom(1446)
^  Redo: (260) [user] subst_vars(1446, _489786, [], _490726)
^  Unify: (260) [user] subst_vars(1446, _489786, [], _490726)
   Call: (261) [system] compound(1446)
^  Redo: (260) [user] subst_vars(1446, _489786, [], _490726)
^  Unify: (260) [user] subst_vars(1446, 1446, [], [])
^  Exit: (260) [user] subst_vars(1446, 1446, [], [])
^  Call: (260) [user] subst_vars([0], _489788, [], _458978)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _489788, [], _458978)
^  Unify: (260) [user] subst_vars([0], [_505658|_505660], [], _458978)
^  Call: (261) [user] subst_vars(0, _505658, [], _506598)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _505658, [], _506598)
^  Unify: (261) [user] subst_vars(0, _505658, [], _506598)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _505658, [], _506598)
^  Unify: (261) [user] subst_vars(0, _505658, [], _506598)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _505658, [], _506598)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _505660, [], _458978)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _505660, [], _458978)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1446, 0], [1446, 0], [], [])
^  Exit: (258) [user] subst_vars([";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0], [";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5946, '$COMMENT', [";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT', [";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), [], [])
   Call: (257) [system] _11074=metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" \"b\" \"c\")],", 1446, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1447, 0, 51818, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$stream_position'(51818, 1447, 0, 51852)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _63802))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _63802))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _63802)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _63802)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _63802)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _63802)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _69414))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _69414))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _69414))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _69414))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _69414)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _69414)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _75000))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _75000))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _75000)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _75000)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _75000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _75000)
   Call: (270) [system] var('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _75000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$VAR'(_82460))
   Call: (270) [system] atom('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _75000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _75000)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _75000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _75000)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _75000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _75000)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0)==[_91740, _91746]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _75000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _75000)
   Call: (270) [system] is_list('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _75000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _75000)
   Call: (270) [system] string('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _75000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _75000)
   Call: (270) [system] compound('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
   Exit: (270) [system] compound('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _101942, _101944)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT', [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0], _105684)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0], _105684)
   Call: (271) [apply] apply:maplist_([";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0], _105684, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0], [_108502|_108504], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _108502)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _108502)
   Call: (273) [system] var(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _108502)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", '$VAR'(_113148))
   Call: (273) [system] atom(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _108502)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _108502)
   Call: (273) [system] ";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],"==true
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _108502)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _108502)
   Call: (273) [system] ";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],"==false
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _108502)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _108502)
   Call: (273) [system] ";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],"==[_122428, _122434]
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _108502)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _108502)
   Call: (273) [system] is_list(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _108502)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _108502)
   Call: (273) [system] string(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
   Exit: (273) [system] string(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _108502)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _108502)
   Call: (273) [system] compound(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _108502)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _108502)
^  Call: (273) [user] symbol(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
^  Unify: (273) [user] symbol(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
   Call: (274) [system] atom(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
   Fail: (274) [system] atom(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
^  Fail: (273) [user] symbol(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _108502)
   Call: (273) [system] ";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],"=_108502
   Exit: (273) [system] ";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],"=";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],"
^  Exit: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", ";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
   Call: (272) [apply] apply:maplist_([1447, 0], _108504, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1447, 0], [_146500|_146502], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1447, _146500)
^  Unify: (273) [user] mfix_vars1(1447, _146500)
   Call: (274) [system] var(1447)
^  Redo: (273) [user] mfix_vars1(1447, _146500)
^  Unify: (273) [user] mfix_vars1(1447, '$VAR'(_151146))
   Call: (274) [system] atom(1447)
^  Redo: (273) [user] mfix_vars1(1447, _146500)
^  Unify: (273) [user] mfix_vars1(1447, _146500)
   Call: (274) [system] 1447==true
^  Redo: (273) [user] mfix_vars1(1447, _146500)
^  Unify: (273) [user] mfix_vars1(1447, _146500)
   Call: (274) [system] 1447==false
^  Redo: (273) [user] mfix_vars1(1447, _146500)
^  Unify: (273) [user] mfix_vars1(1447, _146500)
   Call: (274) [system] 1447==[_160426, _160432]
^  Redo: (273) [user] mfix_vars1(1447, _146500)
^  Unify: (273) [user] mfix_vars1(1447, _146500)
   Call: (274) [system] is_list(1447)
^  Redo: (273) [user] mfix_vars1(1447, _146500)
^  Unify: (273) [user] mfix_vars1(1447, _146500)
   Call: (274) [system] string(1447)
^  Redo: (273) [user] mfix_vars1(1447, _146500)
^  Unify: (273) [user] mfix_vars1(1447, _146500)
   Call: (274) [system] compound(1447)
^  Redo: (273) [user] mfix_vars1(1447, _146500)
^  Unify: (273) [user] mfix_vars1(1447, _146500)
^  Call: (274) [user] symbol(1447)
^  Unify: (274) [user] symbol(1447)
   Call: (275) [system] atom(1447)
   Fail: (275) [system] atom(1447)
^  Fail: (274) [user] symbol(1447)
^  Redo: (273) [user] mfix_vars1(1447, _146500)
   Call: (274) [system] 1447=_146500
   Exit: (274) [system] 1447=1447
^  Exit: (273) [user] mfix_vars1(1447, 1447)
   Call: (273) [apply] apply:maplist_([0], _146502, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_180826|_180828], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _180826)
^  Unify: (274) [user] mfix_vars1(0, _180826)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _180826)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_185472))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _180826)
^  Unify: (274) [user] mfix_vars1(0, _180826)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _180826)
^  Unify: (274) [user] mfix_vars1(0, _180826)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _180826)
^  Unify: (274) [user] mfix_vars1(0, _180826)
   Call: (275) [system] 0==[_194752, _194758]
^  Redo: (274) [user] mfix_vars1(0, _180826)
^  Unify: (274) [user] mfix_vars1(0, _180826)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _180826)
^  Unify: (274) [user] mfix_vars1(0, _180826)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _180826)
^  Unify: (274) [user] mfix_vars1(0, _180826)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _180826)
^  Unify: (274) [user] mfix_vars1(0, _180826)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _180826)
   Call: (275) [system] 0=_180826
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _180828, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1447, 0], [1447, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0], [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0], [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0])
   Call: (270) [system] compound_name_arguments(_75000, '$COMMENT', [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT', [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0)\=@='$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _69414)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _231000))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _231000))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _231000))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _231000))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _231000)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _231000)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _236586))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _236586))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _236586)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _236586)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _236586)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0)\=@='$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _231000)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _63802))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _63802))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _63802))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _63802))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _63802)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _63802)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _258906))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _258906))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _258906)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _258906)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _258906)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0)\=@='$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _63802)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0)))
   Call: (261) [system] '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0)\=@='$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _287684, [], _287686)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _287684, [], _287686)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _287684, [], _287686)
   Call: (258) [system] atom('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _287684, [], _287686)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _287684, [], _287686)
   Call: (258) [system] compound('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
   Exit: (258) [system] compound('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), _297000, _297002)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT', [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0])
^  Call: (258) [user] subst_vars([";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0], _298886, [], _287686)
^  Unify: (258) [user] subst_vars([";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0], [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0], [], [])
   Call: (259) [system] var([";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0])
^  Redo: (258) [user] subst_vars([";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0], _298886, [], _287686)
^  Unify: (258) [user] subst_vars([";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0], [_302622|_302624], [], _287686)
^  Call: (259) [user] subst_vars(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _302622, [], _303562)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", ";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", [], [])
   Call: (260) [system] var(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _302622, [], _303562)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _302622, [], _303562)
   Call: (260) [system] atom(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _302622, [], _303562)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _302622, [], _303562)
   Call: (260) [system] compound(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _302622, [], _303562)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", ";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", [], [])
^  Exit: (259) [user] subst_vars(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", ";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", [], [])
^  Call: (259) [user] subst_vars([1447, 0], _302624, [], _287686)
^  Unify: (259) [user] subst_vars([1447, 0], [1447, 0], [], [])
   Call: (260) [system] var([1447, 0])
^  Redo: (259) [user] subst_vars([1447, 0], _302624, [], _287686)
^  Unify: (259) [user] subst_vars([1447, 0], [_318494|_318496], [], _287686)
^  Call: (260) [user] subst_vars(1447, _318494, [], _319434)
^  Unify: (260) [user] subst_vars(1447, 1447, [], [])
   Call: (261) [system] var(1447)
^  Redo: (260) [user] subst_vars(1447, _318494, [], _319434)
^  Unify: (260) [user] subst_vars(1447, _318494, [], _319434)
   Call: (261) [system] atom(1447)
^  Redo: (260) [user] subst_vars(1447, _318494, [], _319434)
^  Unify: (260) [user] subst_vars(1447, _318494, [], _319434)
   Call: (261) [system] compound(1447)
^  Redo: (260) [user] subst_vars(1447, _318494, [], _319434)
^  Unify: (260) [user] subst_vars(1447, 1447, [], [])
^  Exit: (260) [user] subst_vars(1447, 1447, [], [])
^  Call: (260) [user] subst_vars([0], _318496, [], _287686)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _318496, [], _287686)
^  Unify: (260) [user] subst_vars([0], [_334366|_334368], [], _287686)
^  Call: (261) [user] subst_vars(0, _334366, [], _335306)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _334366, [], _335306)
^  Unify: (261) [user] subst_vars(0, _334366, [], _335306)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _334366, [], _335306)
^  Unify: (261) [user] subst_vars(0, _334366, [], _335306)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _334366, [], _335306)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _334368, [], _287686)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _334368, [], _287686)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1447, 0], [1447, 0], [], [])
^  Exit: (258) [user] subst_vars([";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0], [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0], [], [])
   Call: (258) [system] compound_name_arguments(_287684, '$COMMENT', [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT', [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), [], [])
   Call: (257) [system] _357724=metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1447, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1448, 0, 51869, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$stream_position'(51869, 1448, 0, 51903)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _410452))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _410452))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _410452)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _410452)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _410452)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _410452)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _416064))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _416064))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _416064))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _416064))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _416064)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _416064)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _421650))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _421650))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _421650)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _421650)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _421650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _421650)
   Call: (270) [system] var('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _421650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$VAR'(_429110))
   Call: (270) [system] atom('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _421650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _421650)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _421650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _421650)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _421650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _421650)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0)==[_438390, _438396]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _421650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _421650)
   Call: (270) [system] is_list('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _421650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _421650)
   Call: (270) [system] string('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _421650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _421650)
   Call: (270) [system] compound('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
   Exit: (270) [system] compound('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _448592, _448594)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT', [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0], _452334)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0], _452334)
   Call: (271) [apply] apply:maplist_([";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0], _452334, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0], [_455152|_455154], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _455152)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _455152)
   Call: (273) [system] var(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _455152)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", '$VAR'(_459798))
   Call: (273) [system] atom(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _455152)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _455152)
   Call: (273) [system] ";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],"==true
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _455152)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _455152)
   Call: (273) [system] ";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],"==false
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _455152)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _455152)
   Call: (273) [system] ";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],"==[_469078, _469084]
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _455152)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _455152)
   Call: (273) [system] is_list(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _455152)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _455152)
   Call: (273) [system] string(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
   Exit: (273) [system] string(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _455152)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _455152)
   Call: (273) [system] compound(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _455152)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _455152)
^  Call: (273) [user] symbol(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
^  Unify: (273) [user] symbol(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
   Call: (274) [system] atom(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
   Fail: (274) [system] atom(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
^  Fail: (273) [user] symbol(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _455152)
   Call: (273) [system] ";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],"=_455152
   Exit: (273) [system] ";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],"=";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],"
^  Exit: (272) [user] mfix_vars1(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", ";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
   Call: (272) [apply] apply:maplist_([1448, 0], _455154, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1448, 0], [_493150|_493152], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1448, _493150)
^  Unify: (273) [user] mfix_vars1(1448, _493150)
   Call: (274) [system] var(1448)
^  Redo: (273) [user] mfix_vars1(1448, _493150)
^  Unify: (273) [user] mfix_vars1(1448, '$VAR'(_497796))
   Call: (274) [system] atom(1448)
^  Redo: (273) [user] mfix_vars1(1448, _493150)
^  Unify: (273) [user] mfix_vars1(1448, _493150)
   Call: (274) [system] 1448==true
^  Redo: (273) [user] mfix_vars1(1448, _493150)
^  Unify: (273) [user] mfix_vars1(1448, _493150)
   Call: (274) [system] 1448==false
^  Redo: (273) [user] mfix_vars1(1448, _493150)
^  Unify: (273) [user] mfix_vars1(1448, _493150)
   Call: (274) [system] 1448==[_507076, _507082]
^  Redo: (273) [user] mfix_vars1(1448, _493150)
^  Unify: (273) [user] mfix_vars1(1448, _493150)
   Call: (274) [system] is_list(1448)
^  Redo: (273) [user] mfix_vars1(1448, _493150)
^  Unify: (273) [user] mfix_vars1(1448, _493150)
   Call: (274) [system] string(1448)
^  Redo: (273) [user] mfix_vars1(1448, _493150)
^  Unify: (273) [user] mfix_vars1(1448, _493150)
   Call: (274) [system] compound(1448)
^  Redo: (273) [user] mfix_vars1(1448, _493150)
^  Unify: (273) [user] mfix_vars1(1448, _493150)
^  Call: (274) [user] symbol(1448)
^  Unify: (274) [user] symbol(1448)
   Call: (275) [system] atom(1448)
   Fail: (275) [system] atom(1448)
^  Fail: (274) [user] symbol(1448)
^  Redo: (273) [user] mfix_vars1(1448, _493150)
   Call: (274) [system] 1448=_6040
   Exit: (274) [system] 1448=1448
^  Exit: (273) [user] mfix_vars1(1448, 1448)
   Call: (273) [apply] apply:maplist_([0], _6042, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_9582|_9584], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _9582)
^  Unify: (274) [user] mfix_vars1(0, _9582)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _9582)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_14228))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _9582)
^  Unify: (274) [user] mfix_vars1(0, _9582)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _9582)
^  Unify: (274) [user] mfix_vars1(0, _9582)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _9582)
^  Unify: (274) [user] mfix_vars1(0, _9582)
   Call: (275) [system] 0==[_23508, _23514]
^  Redo: (274) [user] mfix_vars1(0, _9582)
^  Unify: (274) [user] mfix_vars1(0, _9582)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _9582)
^  Unify: (274) [user] mfix_vars1(0, _9582)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _9582)
^  Unify: (274) [user] mfix_vars1(0, _9582)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _9582)
^  Unify: (274) [user] mfix_vars1(0, _9582)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _9582)
   Call: (275) [system] 0=_9582
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _9584, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1448, 0], [1448, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0], [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0], [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0])
   Call: (270) [system] compound_name_arguments(_5988, '$COMMENT', [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT', [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0)\=@='$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _5974)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _59756))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _59756))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _59756))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _59756))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _59756)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _59756)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _65342))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _65342))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _65342)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _65342)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _65342)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0)\=@='$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _59756)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _5954))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _5954))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _5954))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _5954))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _5954)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _5954)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _87662))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _87662))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _87662)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _87662)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _87662)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0)\=@='$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _5954)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0)))
   Call: (261) [system] '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0)\=@='$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _116440, [], _116442)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _116440, [], _116442)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _116440, [], _116442)
   Call: (258) [system] atom('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _116440, [], _116442)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _116440, [], _116442)
   Call: (258) [system] compound('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
   Exit: (258) [system] compound('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), _125756, _125758)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT', [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0])
^  Call: (258) [user] subst_vars([";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0], _127642, [], _116442)
^  Unify: (258) [user] subst_vars([";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0], [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0], [], [])
   Call: (259) [system] var([";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0])
^  Redo: (258) [user] subst_vars([";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0], _127642, [], _116442)
^  Unify: (258) [user] subst_vars([";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0], [_131378|_131380], [], _116442)
^  Call: (259) [user] subst_vars(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _131378, [], _132318)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", ";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", [], [])
   Call: (260) [system] var(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _131378, [], _132318)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _131378, [], _132318)
   Call: (260) [system] atom(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _131378, [], _132318)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _131378, [], _132318)
   Call: (260) [system] compound(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", _131378, [], _132318)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", ";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", [], [])
^  Exit: (259) [user] subst_vars(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", ";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", [], [])
^  Call: (259) [user] subst_vars([1448, 0], _131380, [], _116442)
^  Unify: (259) [user] subst_vars([1448, 0], [1448, 0], [], [])
   Call: (260) [system] var([1448, 0])
^  Redo: (259) [user] subst_vars([1448, 0], _131380, [], _116442)
^  Unify: (259) [user] subst_vars([1448, 0], [_147250|_147252], [], _116442)
^  Call: (260) [user] subst_vars(1448, _147250, [], _148190)
^  Unify: (260) [user] subst_vars(1448, 1448, [], [])
   Call: (261) [system] var(1448)
^  Redo: (260) [user] subst_vars(1448, _147250, [], _148190)
^  Unify: (260) [user] subst_vars(1448, _147250, [], _148190)
   Call: (261) [system] atom(1448)
^  Redo: (260) [user] subst_vars(1448, _147250, [], _148190)
^  Unify: (260) [user] subst_vars(1448, _147250, [], _148190)
   Call: (261) [system] compound(1448)
^  Redo: (260) [user] subst_vars(1448, _147250, [], _148190)
^  Unify: (260) [user] subst_vars(1448, 1448, [], [])
^  Exit: (260) [user] subst_vars(1448, 1448, [], [])
^  Call: (260) [user] subst_vars([0], _147252, [], _116442)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _147252, [], _116442)
^  Unify: (260) [user] subst_vars([0], [_163122|_163124], [], _116442)
^  Call: (261) [user] subst_vars(0, _163122, [], _164062)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _163122, [], _164062)
^  Unify: (261) [user] subst_vars(0, _163122, [], _164062)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _163122, [], _164062)
^  Unify: (261) [user] subst_vars(0, _163122, [], _164062)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _163122, [], _164062)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _163124, [], _116442)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _163124, [], _116442)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1448, 0], [1448, 0], [], [])
^  Exit: (258) [user] subst_vars([";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0], [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0], [], [])
   Call: (258) [system] compound_name_arguments(_116440, '$COMMENT', [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT', [";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), [], [])
   Call: (257) [system] _186480=metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"ok\" (\"a\" \"b\" \"c\"))],", 1448, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1449, 0, 51920, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$stream_position'(51920, 1449, 0, 51954)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _239204))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _239204))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _239204)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _239204)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _239204)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _239204)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _244816))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _244816))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _244816))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _244816))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _244816)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _244816)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _250402))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _250402))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _250402)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _250402)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _250402)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _250402)
   Call: (270) [system] var('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _250402)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$VAR'(_257862))
   Call: (270) [system] atom('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _250402)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _250402)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _250402)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _250402)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _250402)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _250402)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0)==[_267142, _267148]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _250402)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _250402)
   Call: (270) [system] is_list('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _250402)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _250402)
   Call: (270) [system] string('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _250402)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _250402)
   Call: (270) [system] compound('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
   Exit: (270) [system] compound('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _277344, _277346)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT', [";;                vec![expr!(\"nok\")],", 1449, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;                vec![expr!(\"nok\")],", 1449, 0], _281086)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;                vec![expr!(\"nok\")],", 1449, 0], _281086)
   Call: (271) [apply] apply:maplist_([";;                vec![expr!(\"nok\")],", 1449, 0], _281086, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;                vec![expr!(\"nok\")],", 1449, 0], [_283904|_283906], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")],", _283904)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")],", _283904)
   Call: (273) [system] var(";;                vec![expr!(\"nok\")],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")],", _283904)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")],", '$VAR'(_288550))
   Call: (273) [system] atom(";;                vec![expr!(\"nok\")],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")],", _283904)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")],", _283904)
   Call: (273) [system] ";;                vec![expr!(\"nok\")],"==true
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")],", _283904)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")],", _283904)
   Call: (273) [system] ";;                vec![expr!(\"nok\")],"==false
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")],", _283904)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")],", _283904)
   Call: (273) [system] ";;                vec![expr!(\"nok\")],"==[_297830, _297836]
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")],", _283904)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")],", _283904)
   Call: (273) [system] is_list(";;                vec![expr!(\"nok\")],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")],", _283904)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")],", _283904)
   Call: (273) [system] string(";;                vec![expr!(\"nok\")],")
   Exit: (273) [system] string(";;                vec![expr!(\"nok\")],")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")],", _283904)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")],", _283904)
   Call: (273) [system] compound(";;                vec![expr!(\"nok\")],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")],", _283904)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")],", _283904)
^  Call: (273) [user] symbol(";;                vec![expr!(\"nok\")],")
^  Unify: (273) [user] symbol(";;                vec![expr!(\"nok\")],")
   Call: (274) [system] atom(";;                vec![expr!(\"nok\")],")
   Fail: (274) [system] atom(";;                vec![expr!(\"nok\")],")
^  Fail: (273) [user] symbol(";;                vec![expr!(\"nok\")],")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")],", _283904)
   Call: (273) [system] ";;                vec![expr!(\"nok\")],"=_283904
   Exit: (273) [system] ";;                vec![expr!(\"nok\")],"=";;                vec![expr!(\"nok\")],"
^  Exit: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")],", ";;                vec![expr!(\"nok\")],")
   Call: (272) [apply] apply:maplist_([1449, 0], _283906, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1449, 0], [_321902|_321904], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1449, _321902)
^  Unify: (273) [user] mfix_vars1(1449, _321902)
   Call: (274) [system] var(1449)
^  Redo: (273) [user] mfix_vars1(1449, _321902)
^  Unify: (273) [user] mfix_vars1(1449, '$VAR'(_326548))
   Call: (274) [system] atom(1449)
^  Redo: (273) [user] mfix_vars1(1449, _321902)
^  Unify: (273) [user] mfix_vars1(1449, _321902)
   Call: (274) [system] 1449==true
^  Redo: (273) [user] mfix_vars1(1449, _321902)
^  Unify: (273) [user] mfix_vars1(1449, _321902)
   Call: (274) [system] 1449==false
^  Redo: (273) [user] mfix_vars1(1449, _321902)
^  Unify: (273) [user] mfix_vars1(1449, _321902)
   Call: (274) [system] 1449==[_335828, _335834]
^  Redo: (273) [user] mfix_vars1(1449, _321902)
^  Unify: (273) [user] mfix_vars1(1449, _321902)
   Call: (274) [system] is_list(1449)
^  Redo: (273) [user] mfix_vars1(1449, _321902)
^  Unify: (273) [user] mfix_vars1(1449, _321902)
   Call: (274) [system] string(1449)
^  Redo: (273) [user] mfix_vars1(1449, _321902)
^  Unify: (273) [user] mfix_vars1(1449, _321902)
   Call: (274) [system] compound(1449)
^  Redo: (273) [user] mfix_vars1(1449, _321902)
^  Unify: (273) [user] mfix_vars1(1449, _321902)
^  Call: (274) [user] symbol(1449)
^  Unify: (274) [user] symbol(1449)
   Call: (275) [system] atom(1449)
   Fail: (275) [system] atom(1449)
^  Fail: (274) [user] symbol(1449)
^  Redo: (273) [user] mfix_vars1(1449, _321902)
   Call: (274) [system] 1449=_321902
   Exit: (274) [system] 1449=1449
^  Exit: (273) [user] mfix_vars1(1449, 1449)
   Call: (273) [apply] apply:maplist_([0], _321904, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_356228|_356230], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _356228)
^  Unify: (274) [user] mfix_vars1(0, _356228)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _356228)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_360874))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _356228)
^  Unify: (274) [user] mfix_vars1(0, _356228)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _356228)
^  Unify: (274) [user] mfix_vars1(0, _356228)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _356228)
^  Unify: (274) [user] mfix_vars1(0, _356228)
   Call: (275) [system] 0==[_370154, _370160]
^  Redo: (274) [user] mfix_vars1(0, _356228)
^  Unify: (274) [user] mfix_vars1(0, _356228)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _356228)
^  Unify: (274) [user] mfix_vars1(0, _356228)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _356228)
^  Unify: (274) [user] mfix_vars1(0, _356228)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _356228)
^  Unify: (274) [user] mfix_vars1(0, _356228)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _356228)
   Call: (275) [system] 0=_356228
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _356230, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1449, 0], [1449, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;                vec![expr!(\"nok\")],", 1449, 0], [";;                vec![expr!(\"nok\")],", 1449, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;                vec![expr!(\"nok\")],", 1449, 0], [";;                vec![expr!(\"nok\")],", 1449, 0])
   Call: (270) [system] compound_name_arguments(_250402, '$COMMENT', [";;                vec![expr!(\"nok\")],", 1449, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT', [";;                vec![expr!(\"nok\")],", 1449, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0)\=@='$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _244816)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _406402))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _406402))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _406402))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _406402))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _406402)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _406402)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _411988))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _411988))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _411988)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _411988)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _411988)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0)\=@='$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _406402)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _239204))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _239204))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _239204))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _239204))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _239204)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _239204)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _434308))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _434308))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _434308)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _434308)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _434308)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0)\=@='$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _239204)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0)))
   Call: (261) [system] '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0)\=@='$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _463086, [], _463088)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _463086, [], _463088)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _463086, [], _463088)
   Call: (258) [system] atom('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _463086, [], _463088)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _463086, [], _463088)
   Call: (258) [system] compound('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
   Exit: (258) [system] compound('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), _472402, _472404)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT', [";;                vec![expr!(\"nok\")],", 1449, 0])
^  Call: (258) [user] subst_vars([";;                vec![expr!(\"nok\")],", 1449, 0], _474288, [], _463088)
^  Unify: (258) [user] subst_vars([";;                vec![expr!(\"nok\")],", 1449, 0], [";;                vec![expr!(\"nok\")],", 1449, 0], [], [])
   Call: (259) [system] var([";;                vec![expr!(\"nok\")],", 1449, 0])
^  Redo: (258) [user] subst_vars([";;                vec![expr!(\"nok\")],", 1449, 0], _474288, [], _463088)
^  Unify: (258) [user] subst_vars([";;                vec![expr!(\"nok\")],", 1449, 0], [_478024|_478026], [], _463088)
^  Call: (259) [user] subst_vars(";;                vec![expr!(\"nok\")],", _478024, [], _478964)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"nok\")],", ";;                vec![expr!(\"nok\")],", [], [])
   Call: (260) [system] var(";;                vec![expr!(\"nok\")],")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"nok\")],", _478024, [], _478964)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"nok\")],", _478024, [], _478964)
   Call: (260) [system] atom(";;                vec![expr!(\"nok\")],")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"nok\")],", _478024, [], _478964)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"nok\")],", _478024, [], _478964)
   Call: (260) [system] compound(";;                vec![expr!(\"nok\")],")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"nok\")],", _478024, [], _478964)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"nok\")],", ";;                vec![expr!(\"nok\")],", [], [])
^  Exit: (259) [user] subst_vars(";;                vec![expr!(\"nok\")],", ";;                vec![expr!(\"nok\")],", [], [])
^  Call: (259) [user] subst_vars([1449, 0], _478026, [], _463088)
^  Unify: (259) [user] subst_vars([1449, 0], [1449, 0], [], [])
   Call: (260) [system] var([1449, 0])
^  Redo: (259) [user] subst_vars([1449, 0], _478026, [], _463088)
^  Unify: (259) [user] subst_vars([1449, 0], [_493896|_493898], [], _463088)
^  Call: (260) [user] subst_vars(1449, _493896, [], _494836)
^  Unify: (260) [user] subst_vars(1449, 1449, [], [])
   Call: (261) [system] var(1449)
^  Redo: (260) [user] subst_vars(1449, _493896, [], _494836)
^  Unify: (260) [user] subst_vars(1449, _493896, [], _494836)
   Call: (261) [system] atom(1449)
^  Redo: (260) [user] subst_vars(1449, _493896, [], _494836)
^  Unify: (260) [user] subst_vars(1449, _493896, [], _494836)
   Call: (261) [system] compound(1449)
^  Redo: (260) [user] subst_vars(1449, _493896, [], _494836)
^  Unify: (260) [user] subst_vars(1449, 1449, [], [])
^  Exit: (260) [user] subst_vars(1449, 1449, [], [])
^  Call: (260) [user] subst_vars([0], _493898, [], _463088)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _493898, [], _463088)
^  Unify: (260) [user] subst_vars([0], [_509768|_509770], [], _463088)
^  Call: (261) [user] subst_vars(0, _509768, [], _510708)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _509768, [], _510708)
^  Unify: (261) [user] subst_vars(0, _509768, [], _510708)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _509768, [], _510708)
^  Unify: (261) [user] subst_vars(0, _509768, [], _510708)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _509768, [], _510708)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _509770, [], _463088)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _5992, [], _5946)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1449, 0], [1449, 0], [], [])
^  Exit: (258) [user] subst_vars([";;                vec![expr!(\"nok\")],", 1449, 0], [";;                vec![expr!(\"nok\")],", 1449, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5944, '$COMMENT', [";;                vec![expr!(\"nok\")],", 1449, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT', [";;                vec![expr!(\"nok\")],", 1449, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), [], [])
   Call: (257) [system] _15166=metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"nok\")],", 1449, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1450, 0, 51958, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$stream_position'(51958, 1450, 0, 51992)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _67890))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _67890))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _67890)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _67890)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _67890)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _67890)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _73502))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _73502))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _73502))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _73502))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _73502)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _73502)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _79088))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _79088))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _79088)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _79088)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _79088)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _79088)
   Call: (270) [system] var('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _79088)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$VAR'(_86548))
   Call: (270) [system] atom('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _79088)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _79088)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _79088)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _79088)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _79088)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _79088)
   Call: (270) [system] '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0)==[_95828, _95834]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _79088)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _79088)
   Call: (270) [system] is_list('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _79088)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _79088)
   Call: (270) [system] string('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _79088)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _79088)
   Call: (270) [system] compound('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
   Exit: (270) [system] compound('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _106030, _106032)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT', [";;                vec![expr!(\"nok\")]", 1450, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;                vec![expr!(\"nok\")]", 1450, 0], _109772)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;                vec![expr!(\"nok\")]", 1450, 0], _109772)
   Call: (271) [apply] apply:maplist_([";;                vec![expr!(\"nok\")]", 1450, 0], _109772, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;                vec![expr!(\"nok\")]", 1450, 0], [_112590|_112592], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")]", _112590)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")]", _112590)
   Call: (273) [system] var(";;                vec![expr!(\"nok\")]")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")]", _112590)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")]", '$VAR'(_117236))
   Call: (273) [system] atom(";;                vec![expr!(\"nok\")]")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")]", _112590)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")]", _112590)
   Call: (273) [system] ";;                vec![expr!(\"nok\")]"==true
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")]", _112590)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")]", _112590)
   Call: (273) [system] ";;                vec![expr!(\"nok\")]"==false
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")]", _112590)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")]", _112590)
   Call: (273) [system] ";;                vec![expr!(\"nok\")]"==[_126516, _126522]
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")]", _112590)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")]", _112590)
   Call: (273) [system] is_list(";;                vec![expr!(\"nok\")]")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")]", _112590)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")]", _112590)
   Call: (273) [system] string(";;                vec![expr!(\"nok\")]")
   Exit: (273) [system] string(";;                vec![expr!(\"nok\")]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")]", _112590)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")]", _112590)
   Call: (273) [system] compound(";;                vec![expr!(\"nok\")]")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")]", _112590)
^  Unify: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")]", _112590)
^  Call: (273) [user] symbol(";;                vec![expr!(\"nok\")]")
^  Unify: (273) [user] symbol(";;                vec![expr!(\"nok\")]")
   Call: (274) [system] atom(";;                vec![expr!(\"nok\")]")
   Fail: (274) [system] atom(";;                vec![expr!(\"nok\")]")
^  Fail: (273) [user] symbol(";;                vec![expr!(\"nok\")]")
^  Redo: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")]", _112590)
   Call: (273) [system] ";;                vec![expr!(\"nok\")]"=_112590
   Exit: (273) [system] ";;                vec![expr!(\"nok\")]"=";;                vec![expr!(\"nok\")]"
^  Exit: (272) [user] mfix_vars1(";;                vec![expr!(\"nok\")]", ";;                vec![expr!(\"nok\")]")
   Call: (272) [apply] apply:maplist_([1450, 0], _112592, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1450, 0], [_150588|_150590], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1450, _150588)
^  Unify: (273) [user] mfix_vars1(1450, _150588)
   Call: (274) [system] var(1450)
^  Redo: (273) [user] mfix_vars1(1450, _150588)
^  Unify: (273) [user] mfix_vars1(1450, '$VAR'(_155234))
   Call: (274) [system] atom(1450)
^  Redo: (273) [user] mfix_vars1(1450, _150588)
^  Unify: (273) [user] mfix_vars1(1450, _150588)
   Call: (274) [system] 1450==true
^  Redo: (273) [user] mfix_vars1(1450, _150588)
^  Unify: (273) [user] mfix_vars1(1450, _150588)
   Call: (274) [system] 1450==false
^  Redo: (273) [user] mfix_vars1(1450, _150588)
^  Unify: (273) [user] mfix_vars1(1450, _150588)
   Call: (274) [system] 1450==[_164514, _164520]
^  Redo: (273) [user] mfix_vars1(1450, _150588)
^  Unify: (273) [user] mfix_vars1(1450, _150588)
   Call: (274) [system] is_list(1450)
^  Redo: (273) [user] mfix_vars1(1450, _150588)
^  Unify: (273) [user] mfix_vars1(1450, _150588)
   Call: (274) [system] string(1450)
^  Redo: (273) [user] mfix_vars1(1450, _150588)
^  Unify: (273) [user] mfix_vars1(1450, _150588)
   Call: (274) [system] compound(1450)
^  Redo: (273) [user] mfix_vars1(1450, _150588)
^  Unify: (273) [user] mfix_vars1(1450, _150588)
^  Call: (274) [user] symbol(1450)
^  Unify: (274) [user] symbol(1450)
   Call: (275) [system] atom(1450)
   Fail: (275) [system] atom(1450)
^  Fail: (274) [user] symbol(1450)
^  Redo: (273) [user] mfix_vars1(1450, _150588)
   Call: (274) [system] 1450=_150588
   Exit: (274) [system] 1450=1450
^  Exit: (273) [user] mfix_vars1(1450, 1450)
   Call: (273) [apply] apply:maplist_([0], _150590, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_184914|_184916], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _184914)
^  Unify: (274) [user] mfix_vars1(0, _184914)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _184914)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_189560))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _184914)
^  Unify: (274) [user] mfix_vars1(0, _184914)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _184914)
^  Unify: (274) [user] mfix_vars1(0, _184914)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _184914)
^  Unify: (274) [user] mfix_vars1(0, _184914)
   Call: (275) [system] 0==[_198840, _198846]
^  Redo: (274) [user] mfix_vars1(0, _184914)
^  Unify: (274) [user] mfix_vars1(0, _184914)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _184914)
^  Unify: (274) [user] mfix_vars1(0, _184914)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _184914)
^  Unify: (274) [user] mfix_vars1(0, _184914)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _184914)
^  Unify: (274) [user] mfix_vars1(0, _184914)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _184914)
   Call: (275) [system] 0=_184914
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _184916, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1450, 0], [1450, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;                vec![expr!(\"nok\")]", 1450, 0], [";;                vec![expr!(\"nok\")]", 1450, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;                vec![expr!(\"nok\")]", 1450, 0], [";;                vec![expr!(\"nok\")]", 1450, 0])
   Call: (270) [system] compound_name_arguments(_79088, '$COMMENT', [";;                vec![expr!(\"nok\")]", 1450, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT', [";;                vec![expr!(\"nok\")]", 1450, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0)\=@='$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _73502)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _235088))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _235088))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _235088))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _235088))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _235088)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _235088)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _240674))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _240674))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _240674)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _240674)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _240674)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0)\=@='$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _235088)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _67890))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _67890))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _67890))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _67890))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _67890)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _67890)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _262994))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _262994))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _262994)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _262994)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _262994)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0)))
   Call: (267) [system] '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0)\=@='$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _67890)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0)))
   Call: (261) [system] '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0)\=@='$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _291772, [], _291774)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _291772, [], _291774)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _291772, [], _291774)
   Call: (258) [system] atom('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _291772, [], _291774)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _291772, [], _291774)
   Call: (258) [system] compound('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
   Exit: (258) [system] compound('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), _301088, _301090)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT', [";;                vec![expr!(\"nok\")]", 1450, 0])
^  Call: (258) [user] subst_vars([";;                vec![expr!(\"nok\")]", 1450, 0], _302974, [], _291774)
^  Unify: (258) [user] subst_vars([";;                vec![expr!(\"nok\")]", 1450, 0], [";;                vec![expr!(\"nok\")]", 1450, 0], [], [])
   Call: (259) [system] var([";;                vec![expr!(\"nok\")]", 1450, 0])
^  Redo: (258) [user] subst_vars([";;                vec![expr!(\"nok\")]", 1450, 0], _302974, [], _291774)
^  Unify: (258) [user] subst_vars([";;                vec![expr!(\"nok\")]", 1450, 0], [_306710|_306712], [], _291774)
^  Call: (259) [user] subst_vars(";;                vec![expr!(\"nok\")]", _306710, [], _307650)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"nok\")]", ";;                vec![expr!(\"nok\")]", [], [])
   Call: (260) [system] var(";;                vec![expr!(\"nok\")]")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"nok\")]", _306710, [], _307650)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"nok\")]", _306710, [], _307650)
   Call: (260) [system] atom(";;                vec![expr!(\"nok\")]")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"nok\")]", _306710, [], _307650)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"nok\")]", _306710, [], _307650)
   Call: (260) [system] compound(";;                vec![expr!(\"nok\")]")
^  Redo: (259) [user] subst_vars(";;                vec![expr!(\"nok\")]", _306710, [], _307650)
^  Unify: (259) [user] subst_vars(";;                vec![expr!(\"nok\")]", ";;                vec![expr!(\"nok\")]", [], [])
^  Exit: (259) [user] subst_vars(";;                vec![expr!(\"nok\")]", ";;                vec![expr!(\"nok\")]", [], [])
^  Call: (259) [user] subst_vars([1450, 0], _306712, [], _291774)
^  Unify: (259) [user] subst_vars([1450, 0], [1450, 0], [], [])
   Call: (260) [system] var([1450, 0])
^  Redo: (259) [user] subst_vars([1450, 0], _306712, [], _291774)
^  Unify: (259) [user] subst_vars([1450, 0], [_322582|_322584], [], _291774)
^  Call: (260) [user] subst_vars(1450, _322582, [], _323522)
^  Unify: (260) [user] subst_vars(1450, 1450, [], [])
   Call: (261) [system] var(1450)
^  Redo: (260) [user] subst_vars(1450, _322582, [], _323522)
^  Unify: (260) [user] subst_vars(1450, _322582, [], _323522)
   Call: (261) [system] atom(1450)
^  Redo: (260) [user] subst_vars(1450, _322582, [], _323522)
^  Unify: (260) [user] subst_vars(1450, _322582, [], _323522)
   Call: (261) [system] compound(1450)
^  Redo: (260) [user] subst_vars(1450, _322582, [], _323522)
^  Unify: (260) [user] subst_vars(1450, 1450, [], [])
^  Exit: (260) [user] subst_vars(1450, 1450, [], [])
^  Call: (260) [user] subst_vars([0], _322584, [], _291774)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _322584, [], _291774)
^  Unify: (260) [user] subst_vars([0], [_338454|_338456], [], _291774)
^  Call: (261) [user] subst_vars(0, _338454, [], _339394)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _338454, [], _339394)
^  Unify: (261) [user] subst_vars(0, _338454, [], _339394)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _338454, [], _339394)
^  Unify: (261) [user] subst_vars(0, _338454, [], _339394)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _338454, [], _339394)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _338456, [], _291774)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _338456, [], _291774)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1450, 0], [1450, 0], [], [])
^  Exit: (258) [user] subst_vars([";;                vec![expr!(\"nok\")]", 1450, 0], [";;                vec![expr!(\"nok\")]", 1450, 0], [], [])
   Call: (258) [system] compound_name_arguments(_291772, '$COMMENT', [";;                vec![expr!(\"nok\")]", 1450, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT', [";;                vec![expr!(\"nok\")]", 1450, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), [], [])
   Call: (257) [system] _361812=metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                vec![expr!(\"nok\")]", 1450, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1451, 0, 51995, '$COMMENT'(";;            ]));", 1451, 0), '$stream_position'(51995, 1451, 0, 52029)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ]));", 1451, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ]));", 1451, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            ]));", 1451, 0), _414532))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            ]));", 1451, 0), _414532))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            ]));", 1451, 0), _414532)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            ]));", 1451, 0), _414532)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            ]));", 1451, 0), _414532)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            ]));", 1451, 0), _414532)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            ]));", 1451, 0), _420144))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            ]));", 1451, 0), _420144))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            ]));", 1451, 0), _420144))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            ]));", 1451, 0), _420144))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ]));", 1451, 0), _420144)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ]));", 1451, 0), _420144)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            ]));", 1451, 0), _425730))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            ]));", 1451, 0), _425730))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            ]));", 1451, 0), _425730)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            ]));", 1451, 0), _425730)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1451, 0), _425730)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1451, 0), _425730)
   Call: (270) [system] var('$COMMENT'(";;            ]));", 1451, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1451, 0), _425730)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1451, 0), '$VAR'(_433190))
   Call: (270) [system] atom('$COMMENT'(";;            ]));", 1451, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1451, 0), _425730)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1451, 0), _425730)
   Call: (270) [system] '$COMMENT'(";;            ]));", 1451, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1451, 0), _425730)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1451, 0), _425730)
   Call: (270) [system] '$COMMENT'(";;            ]));", 1451, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1451, 0), _425730)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1451, 0), _425730)
   Call: (270) [system] '$COMMENT'(";;            ]));", 1451, 0)==[_442470, _442476]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1451, 0), _425730)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1451, 0), _425730)
   Call: (270) [system] is_list('$COMMENT'(";;            ]));", 1451, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1451, 0), _425730)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1451, 0), _425730)
   Call: (270) [system] string('$COMMENT'(";;            ]));", 1451, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1451, 0), _425730)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1451, 0), _425730)
   Call: (270) [system] compound('$COMMENT'(";;            ]));", 1451, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            ]));", 1451, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            ]));", 1451, 0), _452672, _452674)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            ]));", 1451, 0), '$COMMENT', [";;            ]));", 1451, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            ]));", 1451, 0], _456414)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            ]));", 1451, 0], _456414)
   Call: (271) [apply] apply:maplist_([";;            ]));", 1451, 0], _456414, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            ]));", 1451, 0], [_459232|_459234], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            ]));", _459232)
^  Unify: (272) [user] mfix_vars1(";;            ]));", _459232)
   Call: (273) [system] var(";;            ]));")
^  Redo: (272) [user] mfix_vars1(";;            ]));", _459232)
^  Unify: (272) [user] mfix_vars1(";;            ]));", '$VAR'(_463878))
   Call: (273) [system] atom(";;            ]));")
^  Redo: (272) [user] mfix_vars1(";;            ]));", _459232)
^  Unify: (272) [user] mfix_vars1(";;            ]));", _459232)
   Call: (273) [system] ";;            ]));"==true
^  Redo: (272) [user] mfix_vars1(";;            ]));", _459232)
^  Unify: (272) [user] mfix_vars1(";;            ]));", _459232)
   Call: (273) [system] ";;            ]));"==false
^  Redo: (272) [user] mfix_vars1(";;            ]));", _459232)
^  Unify: (272) [user] mfix_vars1(";;            ]));", _459232)
   Call: (273) [system] ";;            ]));"==[_473158, _473164]
^  Redo: (272) [user] mfix_vars1(";;            ]));", _459232)
^  Unify: (272) [user] mfix_vars1(";;            ]));", _459232)
   Call: (273) [system] is_list(";;            ]));")
^  Redo: (272) [user] mfix_vars1(";;            ]));", _459232)
^  Unify: (272) [user] mfix_vars1(";;            ]));", _459232)
   Call: (273) [system] string(";;            ]));")
   Exit: (273) [system] string(";;            ]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            ]));", _459232)
^  Unify: (272) [user] mfix_vars1(";;            ]));", _459232)
   Call: (273) [system] compound(";;            ]));")
^  Redo: (272) [user] mfix_vars1(";;            ]));", _459232)
^  Unify: (272) [user] mfix_vars1(";;            ]));", _459232)
^  Call: (273) [user] symbol(";;            ]));")
^  Unify: (273) [user] symbol(";;            ]));")
   Call: (274) [system] atom(";;            ]));")
   Fail: (274) [system] atom(";;            ]));")
^  Fail: (273) [user] symbol(";;            ]));")
^  Redo: (272) [user] mfix_vars1(";;            ]));", _459232)
   Call: (273) [system] ";;            ]));"=_459232
   Exit: (273) [system] ";;            ]));"=";;            ]));"
^  Exit: (272) [user] mfix_vars1(";;            ]));", ";;            ]));")
   Call: (272) [apply] apply:maplist_([1451, 0], _459234, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1451, 0], [_497230|_497232], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1451, _497230)
^  Unify: (273) [user] mfix_vars1(1451, _497230)
   Call: (274) [system] var(1451)
^  Redo: (273) [user] mfix_vars1(1451, _497230)
^  Unify: (273) [user] mfix_vars1(1451, '$VAR'(_501876))
   Call: (274) [system] atom(1451)
^  Redo: (273) [user] mfix_vars1(1451, _497230)
^  Unify: (273) [user] mfix_vars1(1451, _497230)
   Call: (274) [system] 1451==true
^  Redo: (273) [user] mfix_vars1(1451, _497230)
^  Unify: (273) [user] mfix_vars1(1451, _497230)
   Call: (274) [system] 1451==false
^  Redo: (273) [user] mfix_vars1(1451, _497230)
^  Unify: (273) [user] mfix_vars1(1451, _497230)
   Call: (274) [system] 1451==[_511156, _511162]
^  Redo: (273) [user] mfix_vars1(1451, _497230)
^  Unify: (273) [user] mfix_vars1(1451, _497230)
   Call: (274) [system] is_list(1451)
^  Redo: (273) [user] mfix_vars1(1451, _497230)
^  Unify: (273) [user] mfix_vars1(1451, _497230)
   Call: (274) [system] string(1451)
^  Redo: (273) [user] mfix_vars1(1451, _497230)
^  Unify: (273) [user] mfix_vars1(1451, _497230)
   Call: (274) [system] compound(1451)
^  Redo: (273) [user] mfix_vars1(1451, _497230)
^  Unify: (273) [user] mfix_vars1(1451, _497230)
^  Call: (274) [user] symbol(1451)
^  Unify: (274) [user] symbol(1451)
   Call: (275) [system] atom(1451)
   Fail: (275) [system] atom(1451)
^  Fail: (274) [user] symbol(1451)
^  Redo: (273) [user] mfix_vars1(1451, _6032)
   Call: (274) [system] 1451=_6032
   Exit: (274) [system] 1451=1451
^  Exit: (273) [user] mfix_vars1(1451, 1451)
   Call: (273) [apply] apply:maplist_([0], _6034, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_13428|_13430], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _13428)
^  Unify: (274) [user] mfix_vars1(0, _13428)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _13428)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_18074))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _13428)
^  Unify: (274) [user] mfix_vars1(0, _13428)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _13428)
^  Unify: (274) [user] mfix_vars1(0, _13428)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _13428)
^  Unify: (274) [user] mfix_vars1(0, _13428)
   Call: (275) [system] 0==[_27354, _27360]
^  Redo: (274) [user] mfix_vars1(0, _13428)
^  Unify: (274) [user] mfix_vars1(0, _13428)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _13428)
^  Unify: (274) [user] mfix_vars1(0, _13428)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _13428)
^  Unify: (274) [user] mfix_vars1(0, _13428)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _13428)
^  Unify: (274) [user] mfix_vars1(0, _13428)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _13428)
   Call: (275) [system] 0=_13428
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _13430, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1451, 0], [1451, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            ]));", 1451, 0], [";;            ]));", 1451, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            ]));", 1451, 0], [";;            ]));", 1451, 0])
   Call: (270) [system] compound_name_arguments(_5980, '$COMMENT', [";;            ]));", 1451, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            ]));", 1451, 0), '$COMMENT', [";;            ]));", 1451, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0)))
   Call: (267) [system] '$COMMENT'(";;            ]));", 1451, 0)\=@='$COMMENT'(";;            ]));", 1451, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ]));", 1451, 0), _5966)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            ]));", 1451, 0), _63602))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            ]));", 1451, 0), _63602))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            ]));", 1451, 0), _63602))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            ]));", 1451, 0), _63602))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ]));", 1451, 0), _63602)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ]));", 1451, 0), _63602)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            ]));", 1451, 0), _69188))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            ]));", 1451, 0), _69188))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            ]));", 1451, 0), _69188)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            ]));", 1451, 0), _69188)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            ]));", 1451, 0), _69188)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0)))
   Call: (267) [system] '$COMMENT'(";;            ]));", 1451, 0)\=@='$COMMENT'(";;            ]));", 1451, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ]));", 1451, 0), _63602)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            ]));", 1451, 0), _5946))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            ]));", 1451, 0), _5946))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            ]));", 1451, 0), _5946))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            ]));", 1451, 0), _5946))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ]));", 1451, 0), _5946)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ]));", 1451, 0), _5946)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            ]));", 1451, 0), _91508))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            ]));", 1451, 0), _91508))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            ]));", 1451, 0), _91508)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            ]));", 1451, 0), _91508)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            ]));", 1451, 0), _91508)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0)))
   Call: (267) [system] '$COMMENT'(";;            ]));", 1451, 0)\=@='$COMMENT'(";;            ]));", 1451, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ]));", 1451, 0), _5946)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0)))
   Call: (261) [system] '$COMMENT'(";;            ]));", 1451, 0)\=@='$COMMENT'(";;            ]));", 1451, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ]));", 1451, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ]));", 1451, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ]));", 1451, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ]));", 1451, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            ]));", 1451, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            ]));", 1451, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            ]));", 1451, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            ]));", 1451, 0), _120286, [], _120288)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            ]));", 1451, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            ]));", 1451, 0), _120286, [], _120288)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            ]));", 1451, 0), _120286, [], _120288)
   Call: (258) [system] atom('$COMMENT'(";;            ]));", 1451, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            ]));", 1451, 0), _120286, [], _120288)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            ]));", 1451, 0), _120286, [], _120288)
   Call: (258) [system] compound('$COMMENT'(";;            ]));", 1451, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            ]));", 1451, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            ]));", 1451, 0), _129602, _129604)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            ]));", 1451, 0), '$COMMENT', [";;            ]));", 1451, 0])
^  Call: (258) [user] subst_vars([";;            ]));", 1451, 0], _131488, [], _120288)
^  Unify: (258) [user] subst_vars([";;            ]));", 1451, 0], [";;            ]));", 1451, 0], [], [])
   Call: (259) [system] var([";;            ]));", 1451, 0])
^  Redo: (258) [user] subst_vars([";;            ]));", 1451, 0], _131488, [], _120288)
^  Unify: (258) [user] subst_vars([";;            ]));", 1451, 0], [_135224|_135226], [], _120288)
^  Call: (259) [user] subst_vars(";;            ]));", _135224, [], _136164)
^  Unify: (259) [user] subst_vars(";;            ]));", ";;            ]));", [], [])
   Call: (260) [system] var(";;            ]));")
^  Redo: (259) [user] subst_vars(";;            ]));", _135224, [], _136164)
^  Unify: (259) [user] subst_vars(";;            ]));", _135224, [], _136164)
   Call: (260) [system] atom(";;            ]));")
^  Redo: (259) [user] subst_vars(";;            ]));", _135224, [], _136164)
^  Unify: (259) [user] subst_vars(";;            ]));", _135224, [], _136164)
   Call: (260) [system] compound(";;            ]));")
^  Redo: (259) [user] subst_vars(";;            ]));", _135224, [], _136164)
^  Unify: (259) [user] subst_vars(";;            ]));", ";;            ]));", [], [])
^  Exit: (259) [user] subst_vars(";;            ]));", ";;            ]));", [], [])
^  Call: (259) [user] subst_vars([1451, 0], _135226, [], _120288)
^  Unify: (259) [user] subst_vars([1451, 0], [1451, 0], [], [])
   Call: (260) [system] var([1451, 0])
^  Redo: (259) [user] subst_vars([1451, 0], _135226, [], _120288)
^  Unify: (259) [user] subst_vars([1451, 0], [_151096|_151098], [], _120288)
^  Call: (260) [user] subst_vars(1451, _151096, [], _152036)
^  Unify: (260) [user] subst_vars(1451, 1451, [], [])
   Call: (261) [system] var(1451)
^  Redo: (260) [user] subst_vars(1451, _151096, [], _152036)
^  Unify: (260) [user] subst_vars(1451, _151096, [], _152036)
   Call: (261) [system] atom(1451)
^  Redo: (260) [user] subst_vars(1451, _151096, [], _152036)
^  Unify: (260) [user] subst_vars(1451, _151096, [], _152036)
   Call: (261) [system] compound(1451)
^  Redo: (260) [user] subst_vars(1451, _151096, [], _152036)
^  Unify: (260) [user] subst_vars(1451, 1451, [], [])
^  Exit: (260) [user] subst_vars(1451, 1451, [], [])
^  Call: (260) [user] subst_vars([0], _151098, [], _120288)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _151098, [], _120288)
^  Unify: (260) [user] subst_vars([0], [_166968|_166970], [], _120288)
^  Call: (261) [user] subst_vars(0, _166968, [], _167908)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _166968, [], _167908)
^  Unify: (261) [user] subst_vars(0, _166968, [], _167908)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _166968, [], _167908)
^  Unify: (261) [user] subst_vars(0, _166968, [], _167908)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _166968, [], _167908)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _166970, [], _120288)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _166970, [], _120288)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1451, 0], [1451, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            ]));", 1451, 0], [";;            ]));", 1451, 0], [], [])
   Call: (258) [system] compound_name_arguments(_120286, '$COMMENT', [";;            ]));", 1451, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            ]));", 1451, 0), '$COMMENT', [";;            ]));", 1451, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            ]));", 1451, 0), '$COMMENT'(";;            ]));", 1451, 0), [], [])
   Call: (257) [system] _190326=metta_file_buffer(+, '$COMMENT'(";;            ]));", 1451, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            ]));", 1451, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            ]));", 1451, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            ]));", 1451, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            ]));", 1451, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ]));", 1451, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ]));", 1451, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ]));", 1451, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            ]));", 1451, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1452, 0, 52014, '$COMMENT'(";;    }", 1452, 0), '$stream_position'(52014, 1452, 0, 52048)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1452, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1452, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    }", 1452, 0), _243044))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1452, 0), _243044))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    }", 1452, 0), _243044)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1452, 0), _243044)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1452, 0), _243044)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1452, 0), _243044)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    }", 1452, 0), _248656))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1452, 0), _248656))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1452, 0), _248656))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1452, 0), _248656))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1452, 0), _248656)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1452, 0), _248656)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    }", 1452, 0), _254242))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1452, 0), _254242))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    }", 1452, 0), _254242)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1452, 0), _254242)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1452, 0), _254242)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1452, 0), _254242)
   Call: (270) [system] var('$COMMENT'(";;    }", 1452, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1452, 0), _254242)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1452, 0), '$VAR'(_261702))
   Call: (270) [system] atom('$COMMENT'(";;    }", 1452, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1452, 0), _254242)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1452, 0), _254242)
   Call: (270) [system] '$COMMENT'(";;    }", 1452, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1452, 0), _254242)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1452, 0), _254242)
   Call: (270) [system] '$COMMENT'(";;    }", 1452, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1452, 0), _254242)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1452, 0), _254242)
   Call: (270) [system] '$COMMENT'(";;    }", 1452, 0)==[_270982, _270988]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1452, 0), _254242)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1452, 0), _254242)
   Call: (270) [system] is_list('$COMMENT'(";;    }", 1452, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1452, 0), _254242)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1452, 0), _254242)
   Call: (270) [system] string('$COMMENT'(";;    }", 1452, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1452, 0), _254242)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1452, 0), _254242)
   Call: (270) [system] compound('$COMMENT'(";;    }", 1452, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    }", 1452, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1452, 0), _281184, _281186)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1452, 0), '$COMMENT', [";;    }", 1452, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    }", 1452, 0], _284926)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1452, 0], _284926)
   Call: (271) [apply] apply:maplist_([";;    }", 1452, 0], _284926, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    }", 1452, 0], [_287744|_287746], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    }", _287744)
^  Unify: (272) [user] mfix_vars1(";;    }", _287744)
   Call: (273) [system] var(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _287744)
^  Unify: (272) [user] mfix_vars1(";;    }", '$VAR'(_292390))
   Call: (273) [system] atom(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _287744)
^  Unify: (272) [user] mfix_vars1(";;    }", _287744)
   Call: (273) [system] ";;    }"==true
^  Redo: (272) [user] mfix_vars1(";;    }", _287744)
^  Unify: (272) [user] mfix_vars1(";;    }", _287744)
   Call: (273) [system] ";;    }"==false
^  Redo: (272) [user] mfix_vars1(";;    }", _287744)
^  Unify: (272) [user] mfix_vars1(";;    }", _287744)
   Call: (273) [system] ";;    }"==[_301670, _301676]
^  Redo: (272) [user] mfix_vars1(";;    }", _287744)
^  Unify: (272) [user] mfix_vars1(";;    }", _287744)
   Call: (273) [system] is_list(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _287744)
^  Unify: (272) [user] mfix_vars1(";;    }", _287744)
   Call: (273) [system] string(";;    }")
   Exit: (273) [system] string(";;    }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    }", _287744)
^  Unify: (272) [user] mfix_vars1(";;    }", _287744)
   Call: (273) [system] compound(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _287744)
^  Unify: (272) [user] mfix_vars1(";;    }", _287744)
^  Call: (273) [user] symbol(";;    }")
^  Unify: (273) [user] symbol(";;    }")
   Call: (274) [system] atom(";;    }")
   Fail: (274) [system] atom(";;    }")
^  Fail: (273) [user] symbol(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _287744)
   Call: (273) [system] ";;    }"=_287744
   Exit: (273) [system] ";;    }"=";;    }"
^  Exit: (272) [user] mfix_vars1(";;    }", ";;    }")
   Call: (272) [apply] apply:maplist_([1452, 0], _287746, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1452, 0], [_325742|_325744], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1452, _325742)
^  Unify: (273) [user] mfix_vars1(1452, _325742)
   Call: (274) [system] var(1452)
^  Redo: (273) [user] mfix_vars1(1452, _325742)
^  Unify: (273) [user] mfix_vars1(1452, '$VAR'(_330388))
   Call: (274) [system] atom(1452)
^  Redo: (273) [user] mfix_vars1(1452, _325742)
^  Unify: (273) [user] mfix_vars1(1452, _325742)
   Call: (274) [system] 1452==true
^  Redo: (273) [user] mfix_vars1(1452, _325742)
^  Unify: (273) [user] mfix_vars1(1452, _325742)
   Call: (274) [system] 1452==false
^  Redo: (273) [user] mfix_vars1(1452, _325742)
^  Unify: (273) [user] mfix_vars1(1452, _325742)
   Call: (274) [system] 1452==[_339668, _339674]
^  Redo: (273) [user] mfix_vars1(1452, _325742)
^  Unify: (273) [user] mfix_vars1(1452, _325742)
   Call: (274) [system] is_list(1452)
^  Redo: (273) [user] mfix_vars1(1452, _325742)
^  Unify: (273) [user] mfix_vars1(1452, _325742)
   Call: (274) [system] string(1452)
^  Redo: (273) [user] mfix_vars1(1452, _325742)
^  Unify: (273) [user] mfix_vars1(1452, _325742)
   Call: (274) [system] compound(1452)
^  Redo: (273) [user] mfix_vars1(1452, _325742)
^  Unify: (273) [user] mfix_vars1(1452, _325742)
^  Call: (274) [user] symbol(1452)
^  Unify: (274) [user] symbol(1452)
   Call: (275) [system] atom(1452)
   Fail: (275) [system] atom(1452)
^  Fail: (274) [user] symbol(1452)
^  Redo: (273) [user] mfix_vars1(1452, _325742)
   Call: (274) [system] 1452=_325742
   Exit: (274) [system] 1452=1452
^  Exit: (273) [user] mfix_vars1(1452, 1452)
   Call: (273) [apply] apply:maplist_([0], _325744, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_360068|_360070], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _360068)
^  Unify: (274) [user] mfix_vars1(0, _360068)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _360068)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_364714))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _360068)
^  Unify: (274) [user] mfix_vars1(0, _360068)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _360068)
^  Unify: (274) [user] mfix_vars1(0, _360068)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _360068)
^  Unify: (274) [user] mfix_vars1(0, _360068)
   Call: (275) [system] 0==[_373994, _374000]
^  Redo: (274) [user] mfix_vars1(0, _360068)
^  Unify: (274) [user] mfix_vars1(0, _360068)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _360068)
^  Unify: (274) [user] mfix_vars1(0, _360068)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _360068)
^  Unify: (274) [user] mfix_vars1(0, _360068)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _360068)
^  Unify: (274) [user] mfix_vars1(0, _360068)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _360068)
   Call: (275) [system] 0=_360068
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _360070, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1452, 0], [1452, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    }", 1452, 0], [";;    }", 1452, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1452, 0], [";;    }", 1452, 0])
   Call: (270) [system] compound_name_arguments(_254242, '$COMMENT', [";;    }", 1452, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1452, 0), '$COMMENT', [";;    }", 1452, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1452, 0)\=@='$COMMENT'(";;    }", 1452, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1452, 0), _248656)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    }", 1452, 0), _410242))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1452, 0), _410242))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1452, 0), _410242))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1452, 0), _410242))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1452, 0), _410242)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1452, 0), _410242)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    }", 1452, 0), _415828))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1452, 0), _415828))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    }", 1452, 0), _415828)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1452, 0), _415828)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    }", 1452, 0), _415828)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1452, 0)\=@='$COMMENT'(";;    }", 1452, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1452, 0), _410242)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    }", 1452, 0), _243044))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1452, 0), _243044))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1452, 0), _243044))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1452, 0), _243044))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1452, 0), _243044)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1452, 0), _243044)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    }", 1452, 0), _438148))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1452, 0), _438148))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    }", 1452, 0), _438148)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1452, 0), _438148)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    }", 1452, 0), _438148)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1452, 0)\=@='$COMMENT'(";;    }", 1452, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1452, 0), _243044)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0)))
   Call: (261) [system] '$COMMENT'(";;    }", 1452, 0)\=@='$COMMENT'(";;    }", 1452, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1452, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1452, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1452, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1452, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1452, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    }", 1452, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    }", 1452, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    }", 1452, 0), _466926, [], _466928)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    }", 1452, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1452, 0), _466926, [], _466928)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1452, 0), _466926, [], _466928)
   Call: (258) [system] atom('$COMMENT'(";;    }", 1452, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1452, 0), _466926, [], _466928)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1452, 0), _466926, [], _466928)
   Call: (258) [system] compound('$COMMENT'(";;    }", 1452, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    }", 1452, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1452, 0), _476242, _476244)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1452, 0), '$COMMENT', [";;    }", 1452, 0])
^  Call: (258) [user] subst_vars([";;    }", 1452, 0], _478128, [], _466928)
^  Unify: (258) [user] subst_vars([";;    }", 1452, 0], [";;    }", 1452, 0], [], [])
   Call: (259) [system] var([";;    }", 1452, 0])
^  Redo: (258) [user] subst_vars([";;    }", 1452, 0], _478128, [], _466928)
^  Unify: (258) [user] subst_vars([";;    }", 1452, 0], [_481864|_481866], [], _466928)
^  Call: (259) [user] subst_vars(";;    }", _481864, [], _482804)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
   Call: (260) [system] var(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _481864, [], _482804)
^  Unify: (259) [user] subst_vars(";;    }", _481864, [], _482804)
   Call: (260) [system] atom(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _481864, [], _482804)
^  Unify: (259) [user] subst_vars(";;    }", _481864, [], _482804)
   Call: (260) [system] compound(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _481864, [], _482804)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Exit: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Call: (259) [user] subst_vars([1452, 0], _481866, [], _466928)
^  Unify: (259) [user] subst_vars([1452, 0], [1452, 0], [], [])
   Call: (260) [system] var([1452, 0])
^  Redo: (259) [user] subst_vars([1452, 0], _481866, [], _466928)
^  Unify: (259) [user] subst_vars([1452, 0], [_497736|_497738], [], _466928)
^  Call: (260) [user] subst_vars(1452, _497736, [], _498676)
^  Unify: (260) [user] subst_vars(1452, 1452, [], [])
   Call: (261) [system] var(1452)
^  Redo: (260) [user] subst_vars(1452, _497736, [], _498676)
^  Unify: (260) [user] subst_vars(1452, _497736, [], _498676)
   Call: (261) [system] atom(1452)
^  Redo: (260) [user] subst_vars(1452, _497736, [], _498676)
^  Unify: (260) [user] subst_vars(1452, _497736, [], _498676)
   Call: (261) [system] compound(1452)
^  Redo: (260) [user] subst_vars(1452, _497736, [], _498676)
^  Unify: (260) [user] subst_vars(1452, 1452, [], [])
^  Exit: (260) [user] subst_vars(1452, 1452, [], [])
^  Call: (260) [user] subst_vars([0], _497738, [], _466928)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _497738, [], _466928)
^  Unify: (260) [user] subst_vars([0], [_513608|_513610], [], _466928)
^  Call: (261) [user] subst_vars(0, _513608, [], _514548)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _513608, [], _514548)
^  Unify: (261) [user] subst_vars(0, _513608, [], _514548)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _513608, [], _514548)
^  Unify: (261) [user] subst_vars(0, _513608, [], _514548)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _513608, [], _514548)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _5986, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _5986, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1452, 0], [1452, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    }", 1452, 0], [";;    }", 1452, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5938, '$COMMENT', [";;    }", 1452, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1452, 0), '$COMMENT', [";;    }", 1452, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    }", 1452, 0), '$COMMENT'(";;    }", 1452, 0), [], [])
   Call: (257) [system] _18948=metta_file_buffer(+, '$COMMENT'(";;    }", 1452, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    }", 1452, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    }", 1452, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1452, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1452, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1452, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1452, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1452, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1452, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1453, 0, 52022, '$COMMENT'(";; Converted:", 1453, 0), '$stream_position'(52022, 1453, 0, 52056)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1453, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1453, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1453, 0), _71666))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1453, 0), _71666))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1453, 0), _71666)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1453, 0), _71666)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1453, 0), _71666)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1453, 0), _71666)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1453, 0), _77278))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1453, 0), _77278))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1453, 0), _77278))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1453, 0), _77278))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1453, 0), _77278)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1453, 0), _77278)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1453, 0), _82864))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1453, 0), _82864))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1453, 0), _82864)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1453, 0), _82864)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1453, 0), _82864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1453, 0), _82864)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1453, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1453, 0), _82864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1453, 0), '$VAR'(_90324))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1453, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1453, 0), _82864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1453, 0), _82864)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1453, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1453, 0), _82864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1453, 0), _82864)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1453, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1453, 0), _82864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1453, 0), _82864)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1453, 0)==[_99604, _99610]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1453, 0), _82864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1453, 0), _82864)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1453, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1453, 0), _82864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1453, 0), _82864)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1453, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1453, 0), _82864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1453, 0), _82864)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1453, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1453, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1453, 0), _109806, _109808)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1453, 0), '$COMMENT', [";; Converted:", 1453, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1453, 0], _113548)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1453, 0], _113548)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1453, 0], _113548, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1453, 0], [_116366|_116368], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _116366)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _116366)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _116366)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_121012))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _116366)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _116366)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _116366)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _116366)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _116366)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _116366)
   Call: (273) [system] ";; Converted:"==[_130292, _130298]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _116366)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _116366)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _116366)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _116366)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _116366)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _116366)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _116366)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _116366)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _116366)
   Call: (273) [system] ";; Converted:"=_116366
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1453, 0], _116368, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1453, 0], [_154364|_154366], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1453, _154364)
^  Unify: (273) [user] mfix_vars1(1453, _154364)
   Call: (274) [system] var(1453)
^  Redo: (273) [user] mfix_vars1(1453, _154364)
^  Unify: (273) [user] mfix_vars1(1453, '$VAR'(_159010))
   Call: (274) [system] atom(1453)
^  Redo: (273) [user] mfix_vars1(1453, _154364)
^  Unify: (273) [user] mfix_vars1(1453, _154364)
   Call: (274) [system] 1453==true
^  Redo: (273) [user] mfix_vars1(1453, _154364)
^  Unify: (273) [user] mfix_vars1(1453, _154364)
   Call: (274) [system] 1453==false
^  Redo: (273) [user] mfix_vars1(1453, _154364)
^  Unify: (273) [user] mfix_vars1(1453, _154364)
   Call: (274) [system] 1453==[_168290, _168296]
^  Redo: (273) [user] mfix_vars1(1453, _154364)
^  Unify: (273) [user] mfix_vars1(1453, _154364)
   Call: (274) [system] is_list(1453)
^  Redo: (273) [user] mfix_vars1(1453, _154364)
^  Unify: (273) [user] mfix_vars1(1453, _154364)
   Call: (274) [system] string(1453)
^  Redo: (273) [user] mfix_vars1(1453, _154364)
^  Unify: (273) [user] mfix_vars1(1453, _154364)
   Call: (274) [system] compound(1453)
^  Redo: (273) [user] mfix_vars1(1453, _154364)
^  Unify: (273) [user] mfix_vars1(1453, _154364)
^  Call: (274) [user] symbol(1453)
^  Unify: (274) [user] symbol(1453)
   Call: (275) [system] atom(1453)
   Fail: (275) [system] atom(1453)
^  Fail: (274) [user] symbol(1453)
^  Redo: (273) [user] mfix_vars1(1453, _154364)
   Call: (274) [system] 1453=_154364
   Exit: (274) [system] 1453=1453
^  Exit: (273) [user] mfix_vars1(1453, 1453)
   Call: (273) [apply] apply:maplist_([0], _154366, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_188690|_188692], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _188690)
^  Unify: (274) [user] mfix_vars1(0, _188690)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _188690)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_193336))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _188690)
^  Unify: (274) [user] mfix_vars1(0, _188690)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _188690)
^  Unify: (274) [user] mfix_vars1(0, _188690)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _188690)
^  Unify: (274) [user] mfix_vars1(0, _188690)
   Call: (275) [system] 0==[_202616, _202622]
^  Redo: (274) [user] mfix_vars1(0, _188690)
^  Unify: (274) [user] mfix_vars1(0, _188690)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _188690)
^  Unify: (274) [user] mfix_vars1(0, _188690)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _188690)
^  Unify: (274) [user] mfix_vars1(0, _188690)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _188690)
^  Unify: (274) [user] mfix_vars1(0, _188690)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _188690)
   Call: (275) [system] 0=_188690
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _188692, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1453, 0], [1453, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1453, 0], [";; Converted:", 1453, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1453, 0], [";; Converted:", 1453, 0])
   Call: (270) [system] compound_name_arguments(_82864, '$COMMENT', [";; Converted:", 1453, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1453, 0), '$COMMENT', [";; Converted:", 1453, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1453, 0)\=@='$COMMENT'(";; Converted:", 1453, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1453, 0), _77278)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1453, 0), _238864))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1453, 0), _238864))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1453, 0), _238864))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1453, 0), _238864))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1453, 0), _238864)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1453, 0), _238864)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1453, 0), _244450))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1453, 0), _244450))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1453, 0), _244450)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1453, 0), _244450)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1453, 0), _244450)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1453, 0)\=@='$COMMENT'(";; Converted:", 1453, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1453, 0), _238864)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1453, 0), _71666))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1453, 0), _71666))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1453, 0), _71666))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1453, 0), _71666))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1453, 0), _71666)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1453, 0), _71666)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1453, 0), _266770))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1453, 0), _266770))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1453, 0), _266770)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1453, 0), _266770)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1453, 0), _266770)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1453, 0)\=@='$COMMENT'(";; Converted:", 1453, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1453, 0), _71666)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1453, 0)\=@='$COMMENT'(";; Converted:", 1453, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1453, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1453, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1453, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1453, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1453, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1453, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1453, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1453, 0), _295548, [], _295550)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1453, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1453, 0), _295548, [], _295550)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1453, 0), _295548, [], _295550)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1453, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1453, 0), _295548, [], _295550)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1453, 0), _295548, [], _295550)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1453, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1453, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1453, 0), _304864, _304866)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1453, 0), '$COMMENT', [";; Converted:", 1453, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1453, 0], _306750, [], _295550)
^  Unify: (258) [user] subst_vars([";; Converted:", 1453, 0], [";; Converted:", 1453, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1453, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1453, 0], _306750, [], _295550)
^  Unify: (258) [user] subst_vars([";; Converted:", 1453, 0], [_310486|_310488], [], _295550)
^  Call: (259) [user] subst_vars(";; Converted:", _310486, [], _311426)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _310486, [], _311426)
^  Unify: (259) [user] subst_vars(";; Converted:", _310486, [], _311426)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _310486, [], _311426)
^  Unify: (259) [user] subst_vars(";; Converted:", _310486, [], _311426)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _310486, [], _311426)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1453, 0], _310488, [], _295550)
^  Unify: (259) [user] subst_vars([1453, 0], [1453, 0], [], [])
   Call: (260) [system] var([1453, 0])
^  Redo: (259) [user] subst_vars([1453, 0], _310488, [], _295550)
^  Unify: (259) [user] subst_vars([1453, 0], [_326358|_326360], [], _295550)
^  Call: (260) [user] subst_vars(1453, _326358, [], _327298)
^  Unify: (260) [user] subst_vars(1453, 1453, [], [])
   Call: (261) [system] var(1453)
^  Redo: (260) [user] subst_vars(1453, _326358, [], _327298)
^  Unify: (260) [user] subst_vars(1453, _326358, [], _327298)
   Call: (261) [system] atom(1453)
^  Redo: (260) [user] subst_vars(1453, _326358, [], _327298)
^  Unify: (260) [user] subst_vars(1453, _326358, [], _327298)
   Call: (261) [system] compound(1453)
^  Redo: (260) [user] subst_vars(1453, _326358, [], _327298)
^  Unify: (260) [user] subst_vars(1453, 1453, [], [])
^  Exit: (260) [user] subst_vars(1453, 1453, [], [])
^  Call: (260) [user] subst_vars([0], _326360, [], _295550)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _326360, [], _295550)
^  Unify: (260) [user] subst_vars([0], [_342230|_342232], [], _295550)
^  Call: (261) [user] subst_vars(0, _342230, [], _343170)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _342230, [], _343170)
^  Unify: (261) [user] subst_vars(0, _342230, [], _343170)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _342230, [], _343170)
^  Unify: (261) [user] subst_vars(0, _342230, [], _343170)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _342230, [], _343170)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _342232, [], _295550)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _342232, [], _295550)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1453, 0], [1453, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1453, 0], [";; Converted:", 1453, 0], [], [])
   Call: (258) [system] compound_name_arguments(_295548, '$COMMENT', [";; Converted:", 1453, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1453, 0), '$COMMENT', [";; Converted:", 1453, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1453, 0), '$COMMENT'(";; Converted:", 1453, 0), [], [])
   Call: (257) [system] _365588=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1453, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1453, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1453, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1453, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1453, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1453, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1453, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1453, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1453, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1461, 0, 52431, '$COMMENT'(";; Original:", 1461, 0), '$stream_position'(52431, 1461, 0, 52465)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1461, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1461, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1461, 0), _418306))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1461, 0), _418306))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1461, 0), _418306)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1461, 0), _418306)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1461, 0), _418306)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1461, 0), _418306)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1461, 0), _423918))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1461, 0), _423918))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1461, 0), _423918))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1461, 0), _423918))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1461, 0), _423918)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1461, 0), _423918)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1461, 0), _429504))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1461, 0), _429504))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1461, 0), _429504)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1461, 0), _429504)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1461, 0), _429504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1461, 0), _429504)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1461, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1461, 0), _429504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1461, 0), '$VAR'(_436964))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1461, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1461, 0), _429504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1461, 0), _429504)
   Call: (270) [system] '$COMMENT'(";; Original:", 1461, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1461, 0), _429504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1461, 0), _429504)
   Call: (270) [system] '$COMMENT'(";; Original:", 1461, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1461, 0), _429504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1461, 0), _429504)
   Call: (270) [system] '$COMMENT'(";; Original:", 1461, 0)==[_446244, _446250]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1461, 0), _429504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1461, 0), _429504)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1461, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1461, 0), _429504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1461, 0), _429504)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1461, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1461, 0), _429504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1461, 0), _429504)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1461, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1461, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1461, 0), _456446, _456448)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1461, 0), '$COMMENT', [";; Original:", 1461, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1461, 0], _460188)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1461, 0], _460188)
   Call: (271) [apply] apply:maplist_([";; Original:", 1461, 0], _460188, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1461, 0], [_463006|_463008], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _463006)
^  Unify: (272) [user] mfix_vars1(";; Original:", _463006)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _463006)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_467652))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _463006)
^  Unify: (272) [user] mfix_vars1(";; Original:", _463006)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _463006)
^  Unify: (272) [user] mfix_vars1(";; Original:", _463006)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _463006)
^  Unify: (272) [user] mfix_vars1(";; Original:", _463006)
   Call: (273) [system] ";; Original:"==[_476932, _476938]
^  Redo: (272) [user] mfix_vars1(";; Original:", _463006)
^  Unify: (272) [user] mfix_vars1(";; Original:", _463006)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _463006)
^  Unify: (272) [user] mfix_vars1(";; Original:", _463006)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _463006)
^  Unify: (272) [user] mfix_vars1(";; Original:", _463006)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _463006)
^  Unify: (272) [user] mfix_vars1(";; Original:", _463006)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _463006)
   Call: (273) [system] ";; Original:"=_463006
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1461, 0], _463008, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1461, 0], [_501004|_501006], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1461, _501004)
^  Unify: (273) [user] mfix_vars1(1461, _501004)
   Call: (274) [system] var(1461)
^  Redo: (273) [user] mfix_vars1(1461, _501004)
^  Unify: (273) [user] mfix_vars1(1461, '$VAR'(_505650))
   Call: (274) [system] atom(1461)
^  Redo: (273) [user] mfix_vars1(1461, _501004)
^  Unify: (273) [user] mfix_vars1(1461, _501004)
   Call: (274) [system] 1461==true
^  Redo: (273) [user] mfix_vars1(1461, _501004)
^  Unify: (273) [user] mfix_vars1(1461, _501004)
   Call: (274) [system] 1461==false
^  Redo: (273) [user] mfix_vars1(1461, _501004)
^  Unify: (273) [user] mfix_vars1(1461, _501004)
   Call: (274) [system] 1461==[_514930, _514936]
^  Redo: (273) [user] mfix_vars1(1461, _501004)
^  Unify: (273) [user] mfix_vars1(1461, _501004)
   Call: (274) [system] is_list(1461)
^  Redo: (273) [user] mfix_vars1(1461, _501004)
^  Unify: (273) [user] mfix_vars1(1461, _501004)
   Call: (274) [system] string(1461)
^  Redo: (273) [user] mfix_vars1(1461, _501004)
^  Unify: (273) [user] mfix_vars1(1461, _501004)
   Call: (274) [system] compound(1461)
^  Redo: (273) [user] mfix_vars1(1461, _6030)
^  Unify: (273) [user] mfix_vars1(1461, _6030)
^  Call: (274) [user] symbol(1461)
^  Unify: (274) [user] symbol(1461)
   Call: (275) [system] atom(1461)
   Fail: (275) [system] atom(1461)
^  Fail: (274) [user] symbol(1461)
^  Redo: (273) [user] mfix_vars1(1461, _6030)
   Call: (274) [system] 1461=_6030
   Exit: (274) [system] 1461=1461
^  Exit: (273) [user] mfix_vars1(1461, 1461)
   Call: (273) [apply] apply:maplist_([0], _6032, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_17158|_17160], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _17158)
^  Unify: (274) [user] mfix_vars1(0, _17158)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _17158)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_21804))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _17158)
^  Unify: (274) [user] mfix_vars1(0, _17158)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _17158)
^  Unify: (274) [user] mfix_vars1(0, _17158)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _17158)
^  Unify: (274) [user] mfix_vars1(0, _17158)
   Call: (275) [system] 0==[_31084, _31090]
^  Redo: (274) [user] mfix_vars1(0, _17158)
^  Unify: (274) [user] mfix_vars1(0, _17158)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _17158)
^  Unify: (274) [user] mfix_vars1(0, _17158)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _17158)
^  Unify: (274) [user] mfix_vars1(0, _17158)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _17158)
^  Unify: (274) [user] mfix_vars1(0, _17158)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _17158)
   Call: (275) [system] 0=_17158
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _17160, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1461, 0], [1461, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1461, 0], [";; Original:", 1461, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1461, 0], [";; Original:", 1461, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";; Original:", 1461, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1461, 0), '$COMMENT', [";; Original:", 1461, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1461, 0)\=@='$COMMENT'(";; Original:", 1461, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1461, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1461, 0), _67332))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1461, 0), _67332))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1461, 0), _67332))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1461, 0), _67332))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1461, 0), _67332)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1461, 0), _67332)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1461, 0), _72918))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1461, 0), _72918))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1461, 0), _72918)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1461, 0), _72918)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1461, 0), _72918)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1461, 0)\=@='$COMMENT'(";; Original:", 1461, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1461, 0), _67332)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1461, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1461, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1461, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1461, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1461, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1461, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1461, 0), _95238))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1461, 0), _95238))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1461, 0), _95238)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1461, 0), _95238)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1461, 0), _95238)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1461, 0)\=@='$COMMENT'(";; Original:", 1461, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1461, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1461, 0)\=@='$COMMENT'(";; Original:", 1461, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1461, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1461, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1461, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1461, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1461, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1461, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1461, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1461, 0), _124016, [], _124018)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1461, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1461, 0), _124016, [], _124018)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1461, 0), _124016, [], _124018)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1461, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1461, 0), _124016, [], _124018)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1461, 0), _124016, [], _124018)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1461, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1461, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1461, 0), _133332, _133334)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1461, 0), '$COMMENT', [";; Original:", 1461, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1461, 0], _135218, [], _124018)
^  Unify: (258) [user] subst_vars([";; Original:", 1461, 0], [";; Original:", 1461, 0], [], [])
   Call: (259) [system] var([";; Original:", 1461, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1461, 0], _135218, [], _124018)
^  Unify: (258) [user] subst_vars([";; Original:", 1461, 0], [_138954|_138956], [], _124018)
^  Call: (259) [user] subst_vars(";; Original:", _138954, [], _139894)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _138954, [], _139894)
^  Unify: (259) [user] subst_vars(";; Original:", _138954, [], _139894)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _138954, [], _139894)
^  Unify: (259) [user] subst_vars(";; Original:", _138954, [], _139894)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _138954, [], _139894)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1461, 0], _138956, [], _124018)
^  Unify: (259) [user] subst_vars([1461, 0], [1461, 0], [], [])
   Call: (260) [system] var([1461, 0])
^  Redo: (259) [user] subst_vars([1461, 0], _138956, [], _124018)
^  Unify: (259) [user] subst_vars([1461, 0], [_154826|_154828], [], _124018)
^  Call: (260) [user] subst_vars(1461, _154826, [], _155766)
^  Unify: (260) [user] subst_vars(1461, 1461, [], [])
   Call: (261) [system] var(1461)
^  Redo: (260) [user] subst_vars(1461, _154826, [], _155766)
^  Unify: (260) [user] subst_vars(1461, _154826, [], _155766)
   Call: (261) [system] atom(1461)
^  Redo: (260) [user] subst_vars(1461, _154826, [], _155766)
^  Unify: (260) [user] subst_vars(1461, _154826, [], _155766)
   Call: (261) [system] compound(1461)
^  Redo: (260) [user] subst_vars(1461, _154826, [], _155766)
^  Unify: (260) [user] subst_vars(1461, 1461, [], [])
^  Exit: (260) [user] subst_vars(1461, 1461, [], [])
^  Call: (260) [user] subst_vars([0], _154828, [], _124018)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _154828, [], _124018)
^  Unify: (260) [user] subst_vars([0], [_170698|_170700], [], _124018)
^  Call: (261) [user] subst_vars(0, _170698, [], _171638)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _170698, [], _171638)
^  Unify: (261) [user] subst_vars(0, _170698, [], _171638)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _170698, [], _171638)
^  Unify: (261) [user] subst_vars(0, _170698, [], _171638)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _170698, [], _171638)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _170700, [], _124018)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _170700, [], _124018)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1461, 0], [1461, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1461, 0], [";; Original:", 1461, 0], [], [])
   Call: (258) [system] compound_name_arguments(_124016, '$COMMENT', [";; Original:", 1461, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1461, 0), '$COMMENT', [";; Original:", 1461, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1461, 0), '$COMMENT'(";; Original:", 1461, 0), [], [])
   Call: (257) [system] _194056=metta_file_buffer(+, '$COMMENT'(";; Original:", 1461, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1461, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1461, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1461, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1461, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1461, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1461, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1461, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1461, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1462, 0, 52444, '$COMMENT'(";;    #[test]", 1462, 0), '$stream_position'(52444, 1462, 0, 52478)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1462, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1462, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1462, 0), _246774))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1462, 0), _246774))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1462, 0), _246774)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1462, 0), _246774)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1462, 0), _246774)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1462, 0), _246774)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1462, 0), _252386))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1462, 0), _252386))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1462, 0), _252386))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1462, 0), _252386))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1462, 0), _252386)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1462, 0), _252386)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    #[test]", 1462, 0), _257972))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1462, 0), _257972))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    #[test]", 1462, 0), _257972)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1462, 0), _257972)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1462, 0), _257972)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1462, 0), _257972)
   Call: (270) [system] var('$COMMENT'(";;    #[test]", 1462, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1462, 0), _257972)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1462, 0), '$VAR'(_265432))
   Call: (270) [system] atom('$COMMENT'(";;    #[test]", 1462, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1462, 0), _257972)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1462, 0), _257972)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1462, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1462, 0), _257972)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1462, 0), _257972)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1462, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1462, 0), _257972)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1462, 0), _257972)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1462, 0)==[_274712, _274718]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1462, 0), _257972)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1462, 0), _257972)
   Call: (270) [system] is_list('$COMMENT'(";;    #[test]", 1462, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1462, 0), _257972)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1462, 0), _257972)
   Call: (270) [system] string('$COMMENT'(";;    #[test]", 1462, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1462, 0), _257972)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1462, 0), _257972)
   Call: (270) [system] compound('$COMMENT'(";;    #[test]", 1462, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    #[test]", 1462, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1462, 0), _284914, _284916)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT', [";;    #[test]", 1462, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    #[test]", 1462, 0], _288656)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1462, 0], _288656)
   Call: (271) [apply] apply:maplist_([";;    #[test]", 1462, 0], _288656, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    #[test]", 1462, 0], [_291474|_291476], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    #[test]", _291474)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _291474)
   Call: (273) [system] var(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _291474)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", '$VAR'(_296120))
   Call: (273) [system] atom(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _291474)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _291474)
   Call: (273) [system] ";;    #[test]"==true
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _291474)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _291474)
   Call: (273) [system] ";;    #[test]"==false
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _291474)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _291474)
   Call: (273) [system] ";;    #[test]"==[_305400, _305406]
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _291474)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _291474)
   Call: (273) [system] is_list(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _291474)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _291474)
   Call: (273) [system] string(";;    #[test]")
   Exit: (273) [system] string(";;    #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _291474)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _291474)
   Call: (273) [system] compound(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _291474)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _291474)
^  Call: (273) [user] symbol(";;    #[test]")
^  Unify: (273) [user] symbol(";;    #[test]")
   Call: (274) [system] atom(";;    #[test]")
   Fail: (274) [system] atom(";;    #[test]")
^  Fail: (273) [user] symbol(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _291474)
   Call: (273) [system] ";;    #[test]"=_291474
   Exit: (273) [system] ";;    #[test]"=";;    #[test]"
^  Exit: (272) [user] mfix_vars1(";;    #[test]", ";;    #[test]")
   Call: (272) [apply] apply:maplist_([1462, 0], _291476, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1462, 0], [_329472|_329474], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1462, _329472)
^  Unify: (273) [user] mfix_vars1(1462, _329472)
   Call: (274) [system] var(1462)
^  Redo: (273) [user] mfix_vars1(1462, _329472)
^  Unify: (273) [user] mfix_vars1(1462, '$VAR'(_334118))
   Call: (274) [system] atom(1462)
^  Redo: (273) [user] mfix_vars1(1462, _329472)
^  Unify: (273) [user] mfix_vars1(1462, _329472)
   Call: (274) [system] 1462==true
^  Redo: (273) [user] mfix_vars1(1462, _329472)
^  Unify: (273) [user] mfix_vars1(1462, _329472)
   Call: (274) [system] 1462==false
^  Redo: (273) [user] mfix_vars1(1462, _329472)
^  Unify: (273) [user] mfix_vars1(1462, _329472)
   Call: (274) [system] 1462==[_343398, _343404]
^  Redo: (273) [user] mfix_vars1(1462, _329472)
^  Unify: (273) [user] mfix_vars1(1462, _329472)
   Call: (274) [system] is_list(1462)
^  Redo: (273) [user] mfix_vars1(1462, _329472)
^  Unify: (273) [user] mfix_vars1(1462, _329472)
   Call: (274) [system] string(1462)
^  Redo: (273) [user] mfix_vars1(1462, _329472)
^  Unify: (273) [user] mfix_vars1(1462, _329472)
   Call: (274) [system] compound(1462)
^  Redo: (273) [user] mfix_vars1(1462, _329472)
^  Unify: (273) [user] mfix_vars1(1462, _329472)
^  Call: (274) [user] symbol(1462)
^  Unify: (274) [user] symbol(1462)
   Call: (275) [system] atom(1462)
   Fail: (275) [system] atom(1462)
^  Fail: (274) [user] symbol(1462)
^  Redo: (273) [user] mfix_vars1(1462, _329472)
   Call: (274) [system] 1462=_329472
   Exit: (274) [system] 1462=1462
^  Exit: (273) [user] mfix_vars1(1462, 1462)
   Call: (273) [apply] apply:maplist_([0], _329474, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_363798|_363800], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _363798)
^  Unify: (274) [user] mfix_vars1(0, _363798)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _363798)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_368444))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _363798)
^  Unify: (274) [user] mfix_vars1(0, _363798)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _363798)
^  Unify: (274) [user] mfix_vars1(0, _363798)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _363798)
^  Unify: (274) [user] mfix_vars1(0, _363798)
   Call: (275) [system] 0==[_377724, _377730]
^  Redo: (274) [user] mfix_vars1(0, _363798)
^  Unify: (274) [user] mfix_vars1(0, _363798)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _363798)
^  Unify: (274) [user] mfix_vars1(0, _363798)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _363798)
^  Unify: (274) [user] mfix_vars1(0, _363798)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _363798)
^  Unify: (274) [user] mfix_vars1(0, _363798)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _363798)
   Call: (275) [system] 0=_363798
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _363800, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1462, 0], [1462, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    #[test]", 1462, 0], [";;    #[test]", 1462, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1462, 0], [";;    #[test]", 1462, 0])
   Call: (270) [system] compound_name_arguments(_257972, '$COMMENT', [";;    #[test]", 1462, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT', [";;    #[test]", 1462, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1462, 0)\=@='$COMMENT'(";;    #[test]", 1462, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1462, 0), _252386)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    #[test]", 1462, 0), _413972))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1462, 0), _413972))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1462, 0), _413972))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1462, 0), _413972))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1462, 0), _413972)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1462, 0), _413972)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    #[test]", 1462, 0), _419558))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1462, 0), _419558))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    #[test]", 1462, 0), _419558)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1462, 0), _419558)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1462, 0), _419558)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1462, 0)\=@='$COMMENT'(";;    #[test]", 1462, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1462, 0), _413972)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    #[test]", 1462, 0), _246774))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1462, 0), _246774))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1462, 0), _246774))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1462, 0), _246774))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1462, 0), _246774)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1462, 0), _246774)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    #[test]", 1462, 0), _441878))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1462, 0), _441878))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    #[test]", 1462, 0), _441878)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1462, 0), _441878)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1462, 0), _441878)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1462, 0)\=@='$COMMENT'(";;    #[test]", 1462, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1462, 0), _246774)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0)))
   Call: (261) [system] '$COMMENT'(";;    #[test]", 1462, 0)\=@='$COMMENT'(";;    #[test]", 1462, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1462, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1462, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1462, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1462, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1462, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1462, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1462, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1462, 0), _470656, [], _470658)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    #[test]", 1462, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1462, 0), _470656, [], _470658)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1462, 0), _470656, [], _470658)
   Call: (258) [system] atom('$COMMENT'(";;    #[test]", 1462, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1462, 0), _470656, [], _470658)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1462, 0), _470656, [], _470658)
   Call: (258) [system] compound('$COMMENT'(";;    #[test]", 1462, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    #[test]", 1462, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1462, 0), _479972, _479974)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT', [";;    #[test]", 1462, 0])
^  Call: (258) [user] subst_vars([";;    #[test]", 1462, 0], _481858, [], _470658)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1462, 0], [";;    #[test]", 1462, 0], [], [])
   Call: (259) [system] var([";;    #[test]", 1462, 0])
^  Redo: (258) [user] subst_vars([";;    #[test]", 1462, 0], _481858, [], _470658)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1462, 0], [_485594|_485596], [], _470658)
^  Call: (259) [user] subst_vars(";;    #[test]", _485594, [], _486534)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
   Call: (260) [system] var(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _485594, [], _486534)
^  Unify: (259) [user] subst_vars(";;    #[test]", _485594, [], _486534)
   Call: (260) [system] atom(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _485594, [], _486534)
^  Unify: (259) [user] subst_vars(";;    #[test]", _485594, [], _486534)
   Call: (260) [system] compound(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _485594, [], _486534)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Exit: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Call: (259) [user] subst_vars([1462, 0], _485596, [], _470658)
^  Unify: (259) [user] subst_vars([1462, 0], [1462, 0], [], [])
   Call: (260) [system] var([1462, 0])
^  Redo: (259) [user] subst_vars([1462, 0], _485596, [], _470658)
^  Unify: (259) [user] subst_vars([1462, 0], [_501466|_501468], [], _470658)
^  Call: (260) [user] subst_vars(1462, _501466, [], _502406)
^  Unify: (260) [user] subst_vars(1462, 1462, [], [])
   Call: (261) [system] var(1462)
^  Redo: (260) [user] subst_vars(1462, _501466, [], _502406)
^  Unify: (260) [user] subst_vars(1462, _501466, [], _502406)
   Call: (261) [system] atom(1462)
^  Redo: (260) [user] subst_vars(1462, _501466, [], _502406)
^  Unify: (260) [user] subst_vars(1462, _501466, [], _502406)
   Call: (261) [system] compound(1462)
^  Redo: (260) [user] subst_vars(1462, _501466, [], _502406)
^  Unify: (260) [user] subst_vars(1462, 1462, [], [])
^  Exit: (260) [user] subst_vars(1462, 1462, [], [])
^  Call: (260) [user] subst_vars([0], _501468, [], _470658)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _501468, [], _470658)
^  Unify: (260) [user] subst_vars([0], [_517338|_517340], [], _470658)
^  Call: (261) [user] subst_vars(0, _517338, [], _518278)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _517338, [], _518278)
^  Unify: (261) [user] subst_vars(0, _517338, [], _518278)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _5984, [], _5988)
^  Unify: (261) [user] subst_vars(0, _5984, [], _5988)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _5984, [], _5988)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _5986, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _5986, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1462, 0], [1462, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    #[test]", 1462, 0], [";;    #[test]", 1462, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5938, '$COMMENT', [";;    #[test]", 1462, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT', [";;    #[test]", 1462, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1462, 0), '$COMMENT'(";;    #[test]", 1462, 0), [], [])
   Call: (257) [system] _22680=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1462, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1462, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1462, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1462, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1462, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1462, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1462, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1462, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1462, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1463, 0, 52458, '$COMMENT'(";;    fn test_empty() {", 1463, 0), '$stream_position'(52458, 1463, 0, 52492)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _75402))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _75402))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _75402)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _75402)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    fn test_empty() {", 1463, 0), _75402)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    fn test_empty() {", 1463, 0), _75402)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _81014))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _81014))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _81014))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _81014))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _81014)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _81014)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _86600))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _86600))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _86600)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _86600)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_empty() {", 1463, 0), _86600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_empty() {", 1463, 0), _86600)
   Call: (270) [system] var('$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_empty() {", 1463, 0), _86600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_empty() {", 1463, 0), '$VAR'(_94060))
   Call: (270) [system] atom('$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_empty() {", 1463, 0), _86600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_empty() {", 1463, 0), _86600)
   Call: (270) [system] '$COMMENT'(";;    fn test_empty() {", 1463, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_empty() {", 1463, 0), _86600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_empty() {", 1463, 0), _86600)
   Call: (270) [system] '$COMMENT'(";;    fn test_empty() {", 1463, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_empty() {", 1463, 0), _86600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_empty() {", 1463, 0), _86600)
   Call: (270) [system] '$COMMENT'(";;    fn test_empty() {", 1463, 0)==[_103340, _103346]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_empty() {", 1463, 0), _86600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_empty() {", 1463, 0), _86600)
   Call: (270) [system] is_list('$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_empty() {", 1463, 0), _86600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_empty() {", 1463, 0), _86600)
   Call: (270) [system] string('$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_empty() {", 1463, 0), _86600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_empty() {", 1463, 0), _86600)
   Call: (270) [system] compound('$COMMENT'(";;    fn test_empty() {", 1463, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    fn test_empty() {", 1463, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    fn test_empty() {", 1463, 0), _113542, _113544)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT', [";;    fn test_empty() {", 1463, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    fn test_empty() {", 1463, 0], _117284)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn test_empty() {", 1463, 0], _117284)
   Call: (271) [apply] apply:maplist_([";;    fn test_empty() {", 1463, 0], _117284, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    fn test_empty() {", 1463, 0], [_120102|_120104], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    fn test_empty() {", _120102)
^  Unify: (272) [user] mfix_vars1(";;    fn test_empty() {", _120102)
   Call: (273) [system] var(";;    fn test_empty() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_empty() {", _120102)
^  Unify: (272) [user] mfix_vars1(";;    fn test_empty() {", '$VAR'(_124748))
   Call: (273) [system] atom(";;    fn test_empty() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_empty() {", _120102)
^  Unify: (272) [user] mfix_vars1(";;    fn test_empty() {", _120102)
   Call: (273) [system] ";;    fn test_empty() {"==true
^  Redo: (272) [user] mfix_vars1(";;    fn test_empty() {", _120102)
^  Unify: (272) [user] mfix_vars1(";;    fn test_empty() {", _120102)
   Call: (273) [system] ";;    fn test_empty() {"==false
^  Redo: (272) [user] mfix_vars1(";;    fn test_empty() {", _120102)
^  Unify: (272) [user] mfix_vars1(";;    fn test_empty() {", _120102)
   Call: (273) [system] ";;    fn test_empty() {"==[_134028, _134034]
^  Redo: (272) [user] mfix_vars1(";;    fn test_empty() {", _120102)
^  Unify: (272) [user] mfix_vars1(";;    fn test_empty() {", _120102)
   Call: (273) [system] is_list(";;    fn test_empty() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_empty() {", _120102)
^  Unify: (272) [user] mfix_vars1(";;    fn test_empty() {", _120102)
   Call: (273) [system] string(";;    fn test_empty() {")
   Exit: (273) [system] string(";;    fn test_empty() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    fn test_empty() {", _120102)
^  Unify: (272) [user] mfix_vars1(";;    fn test_empty() {", _120102)
   Call: (273) [system] compound(";;    fn test_empty() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_empty() {", _120102)
^  Unify: (272) [user] mfix_vars1(";;    fn test_empty() {", _120102)
^  Call: (273) [user] symbol(";;    fn test_empty() {")
^  Unify: (273) [user] symbol(";;    fn test_empty() {")
   Call: (274) [system] atom(";;    fn test_empty() {")
   Fail: (274) [system] atom(";;    fn test_empty() {")
^  Fail: (273) [user] symbol(";;    fn test_empty() {")
^  Redo: (272) [user] mfix_vars1(";;    fn test_empty() {", _120102)
   Call: (273) [system] ";;    fn test_empty() {"=_120102
   Exit: (273) [system] ";;    fn test_empty() {"=";;    fn test_empty() {"
^  Exit: (272) [user] mfix_vars1(";;    fn test_empty() {", ";;    fn test_empty() {")
   Call: (272) [apply] apply:maplist_([1463, 0], _120104, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1463, 0], [_158100|_158102], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1463, _158100)
^  Unify: (273) [user] mfix_vars1(1463, _158100)
   Call: (274) [system] var(1463)
^  Redo: (273) [user] mfix_vars1(1463, _158100)
^  Unify: (273) [user] mfix_vars1(1463, '$VAR'(_162746))
   Call: (274) [system] atom(1463)
^  Redo: (273) [user] mfix_vars1(1463, _158100)
^  Unify: (273) [user] mfix_vars1(1463, _158100)
   Call: (274) [system] 1463==true
^  Redo: (273) [user] mfix_vars1(1463, _158100)
^  Unify: (273) [user] mfix_vars1(1463, _158100)
   Call: (274) [system] 1463==false
^  Redo: (273) [user] mfix_vars1(1463, _158100)
^  Unify: (273) [user] mfix_vars1(1463, _158100)
   Call: (274) [system] 1463==[_172026, _172032]
^  Redo: (273) [user] mfix_vars1(1463, _158100)
^  Unify: (273) [user] mfix_vars1(1463, _158100)
   Call: (274) [system] is_list(1463)
^  Redo: (273) [user] mfix_vars1(1463, _158100)
^  Unify: (273) [user] mfix_vars1(1463, _158100)
   Call: (274) [system] string(1463)
^  Redo: (273) [user] mfix_vars1(1463, _158100)
^  Unify: (273) [user] mfix_vars1(1463, _158100)
   Call: (274) [system] compound(1463)
^  Redo: (273) [user] mfix_vars1(1463, _158100)
^  Unify: (273) [user] mfix_vars1(1463, _158100)
^  Call: (274) [user] symbol(1463)
^  Unify: (274) [user] symbol(1463)
   Call: (275) [system] atom(1463)
   Fail: (275) [system] atom(1463)
^  Fail: (274) [user] symbol(1463)
^  Redo: (273) [user] mfix_vars1(1463, _158100)
   Call: (274) [system] 1463=_158100
   Exit: (274) [system] 1463=1463
^  Exit: (273) [user] mfix_vars1(1463, 1463)
   Call: (273) [apply] apply:maplist_([0], _158102, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_192426|_192428], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _192426)
^  Unify: (274) [user] mfix_vars1(0, _192426)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _192426)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_197072))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _192426)
^  Unify: (274) [user] mfix_vars1(0, _192426)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _192426)
^  Unify: (274) [user] mfix_vars1(0, _192426)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _192426)
^  Unify: (274) [user] mfix_vars1(0, _192426)
   Call: (275) [system] 0==[_206352, _206358]
^  Redo: (274) [user] mfix_vars1(0, _192426)
^  Unify: (274) [user] mfix_vars1(0, _192426)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _192426)
^  Unify: (274) [user] mfix_vars1(0, _192426)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _192426)
^  Unify: (274) [user] mfix_vars1(0, _192426)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _192426)
^  Unify: (274) [user] mfix_vars1(0, _192426)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _192426)
   Call: (275) [system] 0=_192426
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _192428, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1463, 0], [1463, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    fn test_empty() {", 1463, 0], [";;    fn test_empty() {", 1463, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn test_empty() {", 1463, 0], [";;    fn test_empty() {", 1463, 0])
   Call: (270) [system] compound_name_arguments(_86600, '$COMMENT', [";;    fn test_empty() {", 1463, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT', [";;    fn test_empty() {", 1463, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn test_empty() {", 1463, 0)\=@='$COMMENT'(";;    fn test_empty() {", 1463, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _81014)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _242600))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _242600))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _242600))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _242600))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _242600)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _242600)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _248186))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _248186))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _248186)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _248186)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    fn test_empty() {", 1463, 0), _248186)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn test_empty() {", 1463, 0)\=@='$COMMENT'(";;    fn test_empty() {", 1463, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _242600)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _75402))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _75402))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _75402))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _75402))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _75402)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _75402)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _270506))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _270506))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _270506)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _270506)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    fn test_empty() {", 1463, 0), _270506)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn test_empty() {", 1463, 0)\=@='$COMMENT'(";;    fn test_empty() {", 1463, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _75402)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0)))
   Call: (261) [system] '$COMMENT'(";;    fn test_empty() {", 1463, 0)\=@='$COMMENT'(";;    fn test_empty() {", 1463, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_empty() {", 1463, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    fn test_empty() {", 1463, 0), _299284, [], _299286)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn test_empty() {", 1463, 0), _299284, [], _299286)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn test_empty() {", 1463, 0), _299284, [], _299286)
   Call: (258) [system] atom('$COMMENT'(";;    fn test_empty() {", 1463, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn test_empty() {", 1463, 0), _299284, [], _299286)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn test_empty() {", 1463, 0), _299284, [], _299286)
   Call: (258) [system] compound('$COMMENT'(";;    fn test_empty() {", 1463, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    fn test_empty() {", 1463, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    fn test_empty() {", 1463, 0), _308600, _308602)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT', [";;    fn test_empty() {", 1463, 0])
^  Call: (258) [user] subst_vars([";;    fn test_empty() {", 1463, 0], _310486, [], _299286)
^  Unify: (258) [user] subst_vars([";;    fn test_empty() {", 1463, 0], [";;    fn test_empty() {", 1463, 0], [], [])
   Call: (259) [system] var([";;    fn test_empty() {", 1463, 0])
^  Redo: (258) [user] subst_vars([";;    fn test_empty() {", 1463, 0], _310486, [], _299286)
^  Unify: (258) [user] subst_vars([";;    fn test_empty() {", 1463, 0], [_314222|_314224], [], _299286)
^  Call: (259) [user] subst_vars(";;    fn test_empty() {", _314222, [], _315162)
^  Unify: (259) [user] subst_vars(";;    fn test_empty() {", ";;    fn test_empty() {", [], [])
   Call: (260) [system] var(";;    fn test_empty() {")
^  Redo: (259) [user] subst_vars(";;    fn test_empty() {", _314222, [], _315162)
^  Unify: (259) [user] subst_vars(";;    fn test_empty() {", _314222, [], _315162)
   Call: (260) [system] atom(";;    fn test_empty() {")
^  Redo: (259) [user] subst_vars(";;    fn test_empty() {", _314222, [], _315162)
^  Unify: (259) [user] subst_vars(";;    fn test_empty() {", _314222, [], _315162)
   Call: (260) [system] compound(";;    fn test_empty() {")
^  Redo: (259) [user] subst_vars(";;    fn test_empty() {", _314222, [], _315162)
^  Unify: (259) [user] subst_vars(";;    fn test_empty() {", ";;    fn test_empty() {", [], [])
^  Exit: (259) [user] subst_vars(";;    fn test_empty() {", ";;    fn test_empty() {", [], [])
^  Call: (259) [user] subst_vars([1463, 0], _314224, [], _299286)
^  Unify: (259) [user] subst_vars([1463, 0], [1463, 0], [], [])
   Call: (260) [system] var([1463, 0])
^  Redo: (259) [user] subst_vars([1463, 0], _314224, [], _299286)
^  Unify: (259) [user] subst_vars([1463, 0], [_330094|_330096], [], _299286)
^  Call: (260) [user] subst_vars(1463, _330094, [], _331034)
^  Unify: (260) [user] subst_vars(1463, 1463, [], [])
   Call: (261) [system] var(1463)
^  Redo: (260) [user] subst_vars(1463, _330094, [], _331034)
^  Unify: (260) [user] subst_vars(1463, _330094, [], _331034)
   Call: (261) [system] atom(1463)
^  Redo: (260) [user] subst_vars(1463, _330094, [], _331034)
^  Unify: (260) [user] subst_vars(1463, _330094, [], _331034)
   Call: (261) [system] compound(1463)
^  Redo: (260) [user] subst_vars(1463, _330094, [], _331034)
^  Unify: (260) [user] subst_vars(1463, 1463, [], [])
^  Exit: (260) [user] subst_vars(1463, 1463, [], [])
^  Call: (260) [user] subst_vars([0], _330096, [], _299286)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _330096, [], _299286)
^  Unify: (260) [user] subst_vars([0], [_345966|_345968], [], _299286)
^  Call: (261) [user] subst_vars(0, _345966, [], _346906)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _345966, [], _346906)
^  Unify: (261) [user] subst_vars(0, _345966, [], _346906)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _345966, [], _346906)
^  Unify: (261) [user] subst_vars(0, _345966, [], _346906)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _345966, [], _346906)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _345968, [], _299286)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _345968, [], _299286)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1463, 0], [1463, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    fn test_empty() {", 1463, 0], [";;    fn test_empty() {", 1463, 0], [], [])
   Call: (258) [system] compound_name_arguments(_299284, '$COMMENT', [";;    fn test_empty() {", 1463, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT', [";;    fn test_empty() {", 1463, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    fn test_empty() {", 1463, 0), '$COMMENT'(";;    fn test_empty() {", 1463, 0), [], [])
   Call: (257) [system] _369324=metta_file_buffer(+, '$COMMENT'(";;    fn test_empty() {", 1463, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    fn test_empty() {", 1463, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    fn test_empty() {", 1463, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn test_empty() {", 1463, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn test_empty() {", 1463, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn test_empty() {", 1463, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn test_empty() {", 1463, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn test_empty() {", 1463, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn test_empty() {", 1463, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1464, 0, 52482, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$stream_position'(52482, 1464, 0, 52516)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _422056))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _422056))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _422056)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _422056)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _422056)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _422056)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _427668))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _427668))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _427668))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _427668))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _427668)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _427668)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _433254))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _433254))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _433254)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _433254)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _433254)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _433254)
   Call: (270) [system] var('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _433254)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$VAR'(_440714))
   Call: (270) [system] atom('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _433254)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _433254)
   Call: (270) [system] '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _433254)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _433254)
   Call: (270) [system] '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _433254)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _433254)
   Call: (270) [system] '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0)==[_449994, _450000]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _433254)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _433254)
   Call: (270) [system] is_list('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _433254)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _433254)
   Call: (270) [system] string('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _433254)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _433254)
   Call: (270) [system] compound('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _460196, _460198)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT', [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0], _463938)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0], _463938)
   Call: (271) [apply] apply:maplist_([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0], _463938, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0], [_466756|_466758], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _466756)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _466756)
   Call: (273) [system] var(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _466756)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", '$VAR'(_471402))
   Call: (273) [system] atom(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _466756)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _466756)
   Call: (273) [system] ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));"==true
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _466756)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _466756)
   Call: (273) [system] ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));"==false
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _466756)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _466756)
   Call: (273) [system] ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));"==[_480682, _480688]
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _466756)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _466756)
   Call: (273) [system] is_list(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _466756)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _466756)
   Call: (273) [system] string(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Exit: (273) [system] string(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _466756)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _466756)
   Call: (273) [system] compound(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _466756)
^  Unify: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _466756)
^  Call: (273) [user] symbol(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Unify: (273) [user] symbol(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (274) [system] atom(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Fail: (274) [system] atom(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Fail: (273) [user] symbol(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _466756)
   Call: (273) [system] ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));"=_466756
   Exit: (273) [system] ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));"=";;        let metta = Metta::new(Some(EnvBuilder::test_env()));"
^  Exit: (272) [user] mfix_vars1(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (272) [apply] apply:maplist_([1464, 0], _466758, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1464, 0], [_504754|_504756], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1464, _504754)
^  Unify: (273) [user] mfix_vars1(1464, _504754)
   Call: (274) [system] var(1464)
^  Redo: (273) [user] mfix_vars1(1464, _504754)
^  Unify: (273) [user] mfix_vars1(1464, '$VAR'(_509400))
   Call: (274) [system] atom(1464)
^  Redo: (273) [user] mfix_vars1(1464, _504754)
^  Unify: (273) [user] mfix_vars1(1464, _504754)
   Call: (274) [system] 1464==true
^  Redo: (273) [user] mfix_vars1(1464, _504754)
^  Unify: (273) [user] mfix_vars1(1464, _504754)
   Call: (274) [system] 1464==false
^  Redo: (273) [user] mfix_vars1(1464, _504754)
^  Unify: (273) [user] mfix_vars1(1464, _504754)
   Call: (274) [system] 1464==[_518680, _518686]
^  Redo: (273) [user] mfix_vars1(1464, _504754)
^  Unify: (273) [user] mfix_vars1(1464, _504754)
   Call: (274) [system] is_list(1464)
^  Redo: (273) [user] mfix_vars1(1464, _504754)
^  Unify: (273) [user] mfix_vars1(1464, _6044)
   Call: (274) [system] string(1464)
^  Redo: (273) [user] mfix_vars1(1464, _6044)
^  Unify: (273) [user] mfix_vars1(1464, _6044)
   Call: (274) [system] compound(1464)
^  Redo: (273) [user] mfix_vars1(1464, _6044)
^  Unify: (273) [user] mfix_vars1(1464, _6044)
^  Call: (274) [user] symbol(1464)
^  Unify: (274) [user] symbol(1464)
   Call: (275) [system] atom(1464)
   Fail: (275) [system] atom(1464)
^  Fail: (274) [user] symbol(1464)
^  Redo: (273) [user] mfix_vars1(1464, _6044)
   Call: (274) [system] 1464=_6044
   Exit: (274) [system] 1464=1464
^  Exit: (273) [user] mfix_vars1(1464, 1464)
   Call: (273) [apply] apply:maplist_([0], _6046, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_21226|_21228], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _21226)
^  Unify: (274) [user] mfix_vars1(0, _21226)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _21226)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_25872))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _21226)
^  Unify: (274) [user] mfix_vars1(0, _21226)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _21226)
^  Unify: (274) [user] mfix_vars1(0, _21226)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _21226)
^  Unify: (274) [user] mfix_vars1(0, _21226)
   Call: (275) [system] 0==[_35152, _35158]
^  Redo: (274) [user] mfix_vars1(0, _21226)
^  Unify: (274) [user] mfix_vars1(0, _21226)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _21226)
^  Unify: (274) [user] mfix_vars1(0, _21226)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _21226)
^  Unify: (274) [user] mfix_vars1(0, _21226)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _21226)
^  Unify: (274) [user] mfix_vars1(0, _21226)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _21226)
   Call: (275) [system] 0=_21226
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _21228, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1464, 0], [1464, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0], [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0], [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0])
   Call: (270) [system] compound_name_arguments(_5992, '$COMMENT', [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT', [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0)))
   Call: (267) [system] '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0)\=@='$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _5978)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _71400))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _71400))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _71400))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _71400))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _71400)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _71400)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _76986))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _76986))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _76986)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _76986)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _76986)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0)))
   Call: (267) [system] '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0)\=@='$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _71400)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _5958))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _5958))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _5958))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _5958))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _5958)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _5958)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _99306))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _99306))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _99306)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _99306)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _99306)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0)))
   Call: (267) [system] '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0)\=@='$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _5958)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0)))
   Call: (261) [system] '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0)\=@='$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _128084, [], _128086)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _128084, [], _128086)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _128084, [], _128086)
   Call: (258) [system] atom('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _128084, [], _128086)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _128084, [], _128086)
   Call: (258) [system] compound('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), _137400, _137402)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT', [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0])
^  Call: (258) [user] subst_vars([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0], _139286, [], _128086)
^  Unify: (258) [user] subst_vars([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0], [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0], [], [])
   Call: (259) [system] var([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0])
^  Redo: (258) [user] subst_vars([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0], _139286, [], _128086)
^  Unify: (258) [user] subst_vars([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0], [_143022|_143024], [], _128086)
^  Call: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _143022, [], _143962)
^  Unify: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
   Call: (260) [system] var(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _143022, [], _143962)
^  Unify: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _143022, [], _143962)
   Call: (260) [system] atom(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _143022, [], _143962)
^  Unify: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _143022, [], _143962)
   Call: (260) [system] compound(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", _143022, [], _143962)
^  Unify: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Exit: (259) [user] subst_vars(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Call: (259) [user] subst_vars([1464, 0], _143024, [], _128086)
^  Unify: (259) [user] subst_vars([1464, 0], [1464, 0], [], [])
   Call: (260) [system] var([1464, 0])
^  Redo: (259) [user] subst_vars([1464, 0], _143024, [], _128086)
^  Unify: (259) [user] subst_vars([1464, 0], [_158894|_158896], [], _128086)
^  Call: (260) [user] subst_vars(1464, _158894, [], _159834)
^  Unify: (260) [user] subst_vars(1464, 1464, [], [])
   Call: (261) [system] var(1464)
^  Redo: (260) [user] subst_vars(1464, _158894, [], _159834)
^  Unify: (260) [user] subst_vars(1464, _158894, [], _159834)
   Call: (261) [system] atom(1464)
^  Redo: (260) [user] subst_vars(1464, _158894, [], _159834)
^  Unify: (260) [user] subst_vars(1464, _158894, [], _159834)
   Call: (261) [system] compound(1464)
^  Redo: (260) [user] subst_vars(1464, _158894, [], _159834)
^  Unify: (260) [user] subst_vars(1464, 1464, [], [])
^  Exit: (260) [user] subst_vars(1464, 1464, [], [])
^  Call: (260) [user] subst_vars([0], _158896, [], _128086)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _158896, [], _128086)
^  Unify: (260) [user] subst_vars([0], [_174766|_174768], [], _128086)
^  Call: (261) [user] subst_vars(0, _174766, [], _175706)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _174766, [], _175706)
^  Unify: (261) [user] subst_vars(0, _174766, [], _175706)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _174766, [], _175706)
^  Unify: (261) [user] subst_vars(0, _174766, [], _175706)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _174766, [], _175706)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _174768, [], _128086)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _174768, [], _128086)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1464, 0], [1464, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0], [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0], [], [])
   Call: (258) [system] compound_name_arguments(_128084, '$COMMENT', [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT', [";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), [], [])
   Call: (257) [system] _198124=metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let metta = Metta::new(Some(EnvBuilder::test_env()));", 1464, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1465, 0, 52546, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$stream_position'(52546, 1465, 0, 52580)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _250850))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _250850))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _250850)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _250850)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _250850)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _250850)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _256462))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _256462))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _256462))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _256462))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _256462)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _256462)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _262048))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _262048))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _262048)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _262048)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _262048)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _262048)
   Call: (270) [system] var('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _262048)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$VAR'(_269508))
   Call: (270) [system] atom('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _262048)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _262048)
   Call: (270) [system] '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _262048)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _262048)
   Call: (270) [system] '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _262048)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _262048)
   Call: (270) [system] '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0)==[_278788, _278794]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _262048)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _262048)
   Call: (270) [system] is_list('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _262048)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _262048)
   Call: (270) [system] string('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _262048)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _262048)
   Call: (270) [system] compound('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _288990, _288992)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT', [";;        let parser = SExprParser::new(\"", 1465, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        let parser = SExprParser::new(\"", 1465, 0], _292732)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let parser = SExprParser::new(\"", 1465, 0], _292732)
   Call: (271) [apply] apply:maplist_([";;        let parser = SExprParser::new(\"", 1465, 0], _292732, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        let parser = SExprParser::new(\"", 1465, 0], [_295550|_295552], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _295550)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _295550)
   Call: (273) [system] var(";;        let parser = SExprParser::new(\"")
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _295550)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", '$VAR'(_300196))
   Call: (273) [system] atom(";;        let parser = SExprParser::new(\"")
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _295550)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _295550)
   Call: (273) [system] ";;        let parser = SExprParser::new(\""==true
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _295550)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _295550)
   Call: (273) [system] ";;        let parser = SExprParser::new(\""==false
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _295550)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _295550)
   Call: (273) [system] ";;        let parser = SExprParser::new(\""==[_309476, _309482]
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _295550)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _295550)
   Call: (273) [system] is_list(";;        let parser = SExprParser::new(\"")
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _295550)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _295550)
   Call: (273) [system] string(";;        let parser = SExprParser::new(\"")
   Exit: (273) [system] string(";;        let parser = SExprParser::new(\"")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _295550)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _295550)
   Call: (273) [system] compound(";;        let parser = SExprParser::new(\"")
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _295550)
^  Unify: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _295550)
^  Call: (273) [user] symbol(";;        let parser = SExprParser::new(\"")
^  Unify: (273) [user] symbol(";;        let parser = SExprParser::new(\"")
   Call: (274) [system] atom(";;        let parser = SExprParser::new(\"")
   Fail: (274) [system] atom(";;        let parser = SExprParser::new(\"")
^  Fail: (273) [user] symbol(";;        let parser = SExprParser::new(\"")
^  Redo: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", _295550)
   Call: (273) [system] ";;        let parser = SExprParser::new(\""=_295550
   Exit: (273) [system] ";;        let parser = SExprParser::new(\""=";;        let parser = SExprParser::new(\""
^  Exit: (272) [user] mfix_vars1(";;        let parser = SExprParser::new(\"", ";;        let parser = SExprParser::new(\"")
   Call: (272) [apply] apply:maplist_([1465, 0], _295552, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1465, 0], [_333548|_333550], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1465, _333548)
^  Unify: (273) [user] mfix_vars1(1465, _333548)
   Call: (274) [system] var(1465)
^  Redo: (273) [user] mfix_vars1(1465, _333548)
^  Unify: (273) [user] mfix_vars1(1465, '$VAR'(_338194))
   Call: (274) [system] atom(1465)
^  Redo: (273) [user] mfix_vars1(1465, _333548)
^  Unify: (273) [user] mfix_vars1(1465, _333548)
   Call: (274) [system] 1465==true
^  Redo: (273) [user] mfix_vars1(1465, _333548)
^  Unify: (273) [user] mfix_vars1(1465, _333548)
   Call: (274) [system] 1465==false
^  Redo: (273) [user] mfix_vars1(1465, _333548)
^  Unify: (273) [user] mfix_vars1(1465, _333548)
   Call: (274) [system] 1465==[_347474, _347480]
^  Redo: (273) [user] mfix_vars1(1465, _333548)
^  Unify: (273) [user] mfix_vars1(1465, _333548)
   Call: (274) [system] is_list(1465)
^  Redo: (273) [user] mfix_vars1(1465, _333548)
^  Unify: (273) [user] mfix_vars1(1465, _333548)
   Call: (274) [system] string(1465)
^  Redo: (273) [user] mfix_vars1(1465, _333548)
^  Unify: (273) [user] mfix_vars1(1465, _333548)
   Call: (274) [system] compound(1465)
^  Redo: (273) [user] mfix_vars1(1465, _333548)
^  Unify: (273) [user] mfix_vars1(1465, _333548)
^  Call: (274) [user] symbol(1465)
^  Unify: (274) [user] symbol(1465)
   Call: (275) [system] atom(1465)
   Fail: (275) [system] atom(1465)
^  Fail: (274) [user] symbol(1465)
^  Redo: (273) [user] mfix_vars1(1465, _333548)
   Call: (274) [system] 1465=_333548
   Exit: (274) [system] 1465=1465
^  Exit: (273) [user] mfix_vars1(1465, 1465)
   Call: (273) [apply] apply:maplist_([0], _333550, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_367874|_367876], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _367874)
^  Unify: (274) [user] mfix_vars1(0, _367874)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _367874)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_372520))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _367874)
^  Unify: (274) [user] mfix_vars1(0, _367874)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _367874)
^  Unify: (274) [user] mfix_vars1(0, _367874)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _367874)
^  Unify: (274) [user] mfix_vars1(0, _367874)
   Call: (275) [system] 0==[_381800, _381806]
^  Redo: (274) [user] mfix_vars1(0, _367874)
^  Unify: (274) [user] mfix_vars1(0, _367874)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _367874)
^  Unify: (274) [user] mfix_vars1(0, _367874)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _367874)
^  Unify: (274) [user] mfix_vars1(0, _367874)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _367874)
^  Unify: (274) [user] mfix_vars1(0, _367874)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _367874)
   Call: (275) [system] 0=_367874
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _367876, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1465, 0], [1465, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        let parser = SExprParser::new(\"", 1465, 0], [";;        let parser = SExprParser::new(\"", 1465, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let parser = SExprParser::new(\"", 1465, 0], [";;        let parser = SExprParser::new(\"", 1465, 0])
   Call: (270) [system] compound_name_arguments(_262048, '$COMMENT', [";;        let parser = SExprParser::new(\"", 1465, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT', [";;        let parser = SExprParser::new(\"", 1465, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0)))
   Call: (267) [system] '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0)\=@='$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _256462)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _418048))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _418048))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _418048))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _418048))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _418048)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _418048)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _423634))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _423634))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _423634)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _423634)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _423634)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0)))
   Call: (267) [system] '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0)\=@='$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _418048)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _250850))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _250850))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _250850))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _250850))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _250850)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _250850)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _445954))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _445954))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _445954)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _445954)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _445954)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0)))
   Call: (267) [system] '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0)\=@='$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _250850)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0)))
   Call: (261) [system] '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0)\=@='$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _474732, [], _474734)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _474732, [], _474734)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _474732, [], _474734)
   Call: (258) [system] atom('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _474732, [], _474734)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _474732, [], _474734)
   Call: (258) [system] compound('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), _484048, _484050)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT', [";;        let parser = SExprParser::new(\"", 1465, 0])
^  Call: (258) [user] subst_vars([";;        let parser = SExprParser::new(\"", 1465, 0], _485934, [], _474734)
^  Unify: (258) [user] subst_vars([";;        let parser = SExprParser::new(\"", 1465, 0], [";;        let parser = SExprParser::new(\"", 1465, 0], [], [])
   Call: (259) [system] var([";;        let parser = SExprParser::new(\"", 1465, 0])
^  Redo: (258) [user] subst_vars([";;        let parser = SExprParser::new(\"", 1465, 0], _485934, [], _474734)
^  Unify: (258) [user] subst_vars([";;        let parser = SExprParser::new(\"", 1465, 0], [_489670|_489672], [], _474734)
^  Call: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", _489670, [], _490610)
^  Unify: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", ";;        let parser = SExprParser::new(\"", [], [])
   Call: (260) [system] var(";;        let parser = SExprParser::new(\"")
^  Redo: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", _489670, [], _490610)
^  Unify: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", _489670, [], _490610)
   Call: (260) [system] atom(";;        let parser = SExprParser::new(\"")
^  Redo: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", _489670, [], _490610)
^  Unify: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", _489670, [], _490610)
   Call: (260) [system] compound(";;        let parser = SExprParser::new(\"")
^  Redo: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", _489670, [], _490610)
^  Unify: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", ";;        let parser = SExprParser::new(\"", [], [])
^  Exit: (259) [user] subst_vars(";;        let parser = SExprParser::new(\"", ";;        let parser = SExprParser::new(\"", [], [])
^  Call: (259) [user] subst_vars([1465, 0], _489672, [], _474734)
^  Unify: (259) [user] subst_vars([1465, 0], [1465, 0], [], [])
   Call: (260) [system] var([1465, 0])
^  Redo: (259) [user] subst_vars([1465, 0], _489672, [], _474734)
^  Unify: (259) [user] subst_vars([1465, 0], [_505542|_505544], [], _474734)
^  Call: (260) [user] subst_vars(1465, _505542, [], _506482)
^  Unify: (260) [user] subst_vars(1465, 1465, [], [])
   Call: (261) [system] var(1465)
^  Redo: (260) [user] subst_vars(1465, _505542, [], _506482)
^  Unify: (260) [user] subst_vars(1465, _505542, [], _506482)
   Call: (261) [system] atom(1465)
^  Redo: (260) [user] subst_vars(1465, _505542, [], _506482)
^  Unify: (260) [user] subst_vars(1465, _505542, [], _506482)
   Call: (261) [system] compound(1465)
^  Redo: (260) [user] subst_vars(1465, _505542, [], _506482)
^  Unify: (260) [user] subst_vars(1465, 1465, [], [])
^  Exit: (260) [user] subst_vars(1465, 1465, [], [])
^  Call: (260) [user] subst_vars([0], _505544, [], _474734)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _505544, [], _474734)
^  Unify: (260) [user] subst_vars([0], [_521414|_521416], [], _474734)
^  Call: (261) [user] subst_vars(0, _521414, [], _522354)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _5992, [], _5996)
^  Unify: (261) [user] subst_vars(0, _5992, [], _5996)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _5992, [], _5996)
^  Unify: (261) [user] subst_vars(0, _5992, [], _5996)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _5992, [], _5996)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _5994, [], _5948)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _5994, [], _5948)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1465, 0], [1465, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        let parser = SExprParser::new(\"", 1465, 0], [";;        let parser = SExprParser::new(\"", 1465, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5946, '$COMMENT', [";;        let parser = SExprParser::new(\"", 1465, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT', [";;        let parser = SExprParser::new(\"", 1465, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), [], [])
   Call: (257) [system] _26898=metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let parser = SExprParser::new(\"", 1465, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1466, 0, 52588, '$COMMENT'(";;            !(empty)", 1466, 0), '$stream_position'(52588, 1466, 0, 52622)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(empty)", 1466, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(empty)", 1466, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            !(empty)", 1466, 0), _79618))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            !(empty)", 1466, 0), _79618))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            !(empty)", 1466, 0), _79618)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            !(empty)", 1466, 0), _79618)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            !(empty)", 1466, 0), _79618)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            !(empty)", 1466, 0), _79618)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            !(empty)", 1466, 0), _85230))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            !(empty)", 1466, 0), _85230))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(empty)", 1466, 0), _85230))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(empty)", 1466, 0), _85230))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(empty)", 1466, 0), _85230)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(empty)", 1466, 0), _85230)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            !(empty)", 1466, 0), _90816))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            !(empty)", 1466, 0), _90816))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            !(empty)", 1466, 0), _90816)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            !(empty)", 1466, 0), _90816)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            !(empty)", 1466, 0), _90816)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(empty)", 1466, 0), _90816)
   Call: (270) [system] var('$COMMENT'(";;            !(empty)", 1466, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(empty)", 1466, 0), _90816)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(empty)", 1466, 0), '$VAR'(_98276))
   Call: (270) [system] atom('$COMMENT'(";;            !(empty)", 1466, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(empty)", 1466, 0), _90816)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(empty)", 1466, 0), _90816)
   Call: (270) [system] '$COMMENT'(";;            !(empty)", 1466, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(empty)", 1466, 0), _90816)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(empty)", 1466, 0), _90816)
   Call: (270) [system] '$COMMENT'(";;            !(empty)", 1466, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(empty)", 1466, 0), _90816)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(empty)", 1466, 0), _90816)
   Call: (270) [system] '$COMMENT'(";;            !(empty)", 1466, 0)==[_107556, _107562]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(empty)", 1466, 0), _90816)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(empty)", 1466, 0), _90816)
   Call: (270) [system] is_list('$COMMENT'(";;            !(empty)", 1466, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(empty)", 1466, 0), _90816)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(empty)", 1466, 0), _90816)
   Call: (270) [system] string('$COMMENT'(";;            !(empty)", 1466, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            !(empty)", 1466, 0), _90816)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            !(empty)", 1466, 0), _90816)
   Call: (270) [system] compound('$COMMENT'(";;            !(empty)", 1466, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            !(empty)", 1466, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            !(empty)", 1466, 0), _117758, _117760)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT', [";;            !(empty)", 1466, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            !(empty)", 1466, 0], _121500)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            !(empty)", 1466, 0], _121500)
   Call: (271) [apply] apply:maplist_([";;            !(empty)", 1466, 0], _121500, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            !(empty)", 1466, 0], [_124318|_124320], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            !(empty)", _124318)
^  Unify: (272) [user] mfix_vars1(";;            !(empty)", _124318)
   Call: (273) [system] var(";;            !(empty)")
^  Redo: (272) [user] mfix_vars1(";;            !(empty)", _124318)
^  Unify: (272) [user] mfix_vars1(";;            !(empty)", '$VAR'(_128964))
   Call: (273) [system] atom(";;            !(empty)")
^  Redo: (272) [user] mfix_vars1(";;            !(empty)", _124318)
^  Unify: (272) [user] mfix_vars1(";;            !(empty)", _124318)
   Call: (273) [system] ";;            !(empty)"==true
^  Redo: (272) [user] mfix_vars1(";;            !(empty)", _124318)
^  Unify: (272) [user] mfix_vars1(";;            !(empty)", _124318)
   Call: (273) [system] ";;            !(empty)"==false
^  Redo: (272) [user] mfix_vars1(";;            !(empty)", _124318)
^  Unify: (272) [user] mfix_vars1(";;            !(empty)", _124318)
   Call: (273) [system] ";;            !(empty)"==[_138244, _138250]
^  Redo: (272) [user] mfix_vars1(";;            !(empty)", _124318)
^  Unify: (272) [user] mfix_vars1(";;            !(empty)", _124318)
   Call: (273) [system] is_list(";;            !(empty)")
^  Redo: (272) [user] mfix_vars1(";;            !(empty)", _124318)
^  Unify: (272) [user] mfix_vars1(";;            !(empty)", _124318)
   Call: (273) [system] string(";;            !(empty)")
   Exit: (273) [system] string(";;            !(empty)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            !(empty)", _124318)
^  Unify: (272) [user] mfix_vars1(";;            !(empty)", _124318)
   Call: (273) [system] compound(";;            !(empty)")
^  Redo: (272) [user] mfix_vars1(";;            !(empty)", _124318)
^  Unify: (272) [user] mfix_vars1(";;            !(empty)", _124318)
^  Call: (273) [user] symbol(";;            !(empty)")
^  Unify: (273) [user] symbol(";;            !(empty)")
   Call: (274) [system] atom(";;            !(empty)")
   Fail: (274) [system] atom(";;            !(empty)")
^  Fail: (273) [user] symbol(";;            !(empty)")
^  Redo: (272) [user] mfix_vars1(";;            !(empty)", _124318)
   Call: (273) [system] ";;            !(empty)"=_124318
   Exit: (273) [system] ";;            !(empty)"=";;            !(empty)"
^  Exit: (272) [user] mfix_vars1(";;            !(empty)", ";;            !(empty)")
   Call: (272) [apply] apply:maplist_([1466, 0], _124320, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1466, 0], [_162316|_162318], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1466, _162316)
^  Unify: (273) [user] mfix_vars1(1466, _162316)
   Call: (274) [system] var(1466)
^  Redo: (273) [user] mfix_vars1(1466, _162316)
^  Unify: (273) [user] mfix_vars1(1466, '$VAR'(_166962))
   Call: (274) [system] atom(1466)
^  Redo: (273) [user] mfix_vars1(1466, _162316)
^  Unify: (273) [user] mfix_vars1(1466, _162316)
   Call: (274) [system] 1466==true
^  Redo: (273) [user] mfix_vars1(1466, _162316)
^  Unify: (273) [user] mfix_vars1(1466, _162316)
   Call: (274) [system] 1466==false
^  Redo: (273) [user] mfix_vars1(1466, _162316)
^  Unify: (273) [user] mfix_vars1(1466, _162316)
   Call: (274) [system] 1466==[_176242, _176248]
^  Redo: (273) [user] mfix_vars1(1466, _162316)
^  Unify: (273) [user] mfix_vars1(1466, _162316)
   Call: (274) [system] is_list(1466)
^  Redo: (273) [user] mfix_vars1(1466, _162316)
^  Unify: (273) [user] mfix_vars1(1466, _162316)
   Call: (274) [system] string(1466)
^  Redo: (273) [user] mfix_vars1(1466, _162316)
^  Unify: (273) [user] mfix_vars1(1466, _162316)
   Call: (274) [system] compound(1466)
^  Redo: (273) [user] mfix_vars1(1466, _162316)
^  Unify: (273) [user] mfix_vars1(1466, _162316)
^  Call: (274) [user] symbol(1466)
^  Unify: (274) [user] symbol(1466)
   Call: (275) [system] atom(1466)
   Fail: (275) [system] atom(1466)
^  Fail: (274) [user] symbol(1466)
^  Redo: (273) [user] mfix_vars1(1466, _162316)
   Call: (274) [system] 1466=_162316
   Exit: (274) [system] 1466=1466
^  Exit: (273) [user] mfix_vars1(1466, 1466)
   Call: (273) [apply] apply:maplist_([0], _162318, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_196642|_196644], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _196642)
^  Unify: (274) [user] mfix_vars1(0, _196642)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _196642)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_201288))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _196642)
^  Unify: (274) [user] mfix_vars1(0, _196642)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _196642)
^  Unify: (274) [user] mfix_vars1(0, _196642)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _196642)
^  Unify: (274) [user] mfix_vars1(0, _196642)
   Call: (275) [system] 0==[_210568, _210574]
^  Redo: (274) [user] mfix_vars1(0, _196642)
^  Unify: (274) [user] mfix_vars1(0, _196642)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _196642)
^  Unify: (274) [user] mfix_vars1(0, _196642)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _196642)
^  Unify: (274) [user] mfix_vars1(0, _196642)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _196642)
^  Unify: (274) [user] mfix_vars1(0, _196642)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _196642)
   Call: (275) [system] 0=_196642
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _196644, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1466, 0], [1466, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            !(empty)", 1466, 0], [";;            !(empty)", 1466, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            !(empty)", 1466, 0], [";;            !(empty)", 1466, 0])
   Call: (270) [system] compound_name_arguments(_90816, '$COMMENT', [";;            !(empty)", 1466, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT', [";;            !(empty)", 1466, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(empty)", 1466, 0)\=@='$COMMENT'(";;            !(empty)", 1466, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(empty)", 1466, 0), _85230)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            !(empty)", 1466, 0), _246816))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            !(empty)", 1466, 0), _246816))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            !(empty)", 1466, 0), _246816))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            !(empty)", 1466, 0), _246816))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(empty)", 1466, 0), _246816)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(empty)", 1466, 0), _246816)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            !(empty)", 1466, 0), _252402))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            !(empty)", 1466, 0), _252402))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            !(empty)", 1466, 0), _252402)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            !(empty)", 1466, 0), _252402)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            !(empty)", 1466, 0), _252402)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(empty)", 1466, 0)\=@='$COMMENT'(";;            !(empty)", 1466, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(empty)", 1466, 0), _246816)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            !(empty)", 1466, 0), _79618))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            !(empty)", 1466, 0), _79618))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            !(empty)", 1466, 0), _79618))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            !(empty)", 1466, 0), _79618))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(empty)", 1466, 0), _79618)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(empty)", 1466, 0), _79618)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            !(empty)", 1466, 0), _274722))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            !(empty)", 1466, 0), _274722))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            !(empty)", 1466, 0), _274722)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            !(empty)", 1466, 0), _274722)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            !(empty)", 1466, 0), _274722)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0)))
   Call: (267) [system] '$COMMENT'(";;            !(empty)", 1466, 0)\=@='$COMMENT'(";;            !(empty)", 1466, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(empty)", 1466, 0), _79618)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0)))
   Call: (261) [system] '$COMMENT'(";;            !(empty)", 1466, 0)\=@='$COMMENT'(";;            !(empty)", 1466, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(empty)", 1466, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(empty)", 1466, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(empty)", 1466, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(empty)", 1466, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            !(empty)", 1466, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            !(empty)", 1466, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            !(empty)", 1466, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            !(empty)", 1466, 0), _303500, [], _303502)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            !(empty)", 1466, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            !(empty)", 1466, 0), _303500, [], _303502)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(empty)", 1466, 0), _303500, [], _303502)
   Call: (258) [system] atom('$COMMENT'(";;            !(empty)", 1466, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            !(empty)", 1466, 0), _303500, [], _303502)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            !(empty)", 1466, 0), _303500, [], _303502)
   Call: (258) [system] compound('$COMMENT'(";;            !(empty)", 1466, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            !(empty)", 1466, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            !(empty)", 1466, 0), _312816, _312818)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT', [";;            !(empty)", 1466, 0])
^  Call: (258) [user] subst_vars([";;            !(empty)", 1466, 0], _314702, [], _303502)
^  Unify: (258) [user] subst_vars([";;            !(empty)", 1466, 0], [";;            !(empty)", 1466, 0], [], [])
   Call: (259) [system] var([";;            !(empty)", 1466, 0])
^  Redo: (258) [user] subst_vars([";;            !(empty)", 1466, 0], _314702, [], _303502)
^  Unify: (258) [user] subst_vars([";;            !(empty)", 1466, 0], [_318438|_318440], [], _303502)
^  Call: (259) [user] subst_vars(";;            !(empty)", _318438, [], _319378)
^  Unify: (259) [user] subst_vars(";;            !(empty)", ";;            !(empty)", [], [])
   Call: (260) [system] var(";;            !(empty)")
^  Redo: (259) [user] subst_vars(";;            !(empty)", _318438, [], _319378)
^  Unify: (259) [user] subst_vars(";;            !(empty)", _318438, [], _319378)
   Call: (260) [system] atom(";;            !(empty)")
^  Redo: (259) [user] subst_vars(";;            !(empty)", _318438, [], _319378)
^  Unify: (259) [user] subst_vars(";;            !(empty)", _318438, [], _319378)
   Call: (260) [system] compound(";;            !(empty)")
^  Redo: (259) [user] subst_vars(";;            !(empty)", _318438, [], _319378)
^  Unify: (259) [user] subst_vars(";;            !(empty)", ";;            !(empty)", [], [])
^  Exit: (259) [user] subst_vars(";;            !(empty)", ";;            !(empty)", [], [])
^  Call: (259) [user] subst_vars([1466, 0], _318440, [], _303502)
^  Unify: (259) [user] subst_vars([1466, 0], [1466, 0], [], [])
   Call: (260) [system] var([1466, 0])
^  Redo: (259) [user] subst_vars([1466, 0], _318440, [], _303502)
^  Unify: (259) [user] subst_vars([1466, 0], [_334310|_334312], [], _303502)
^  Call: (260) [user] subst_vars(1466, _334310, [], _335250)
^  Unify: (260) [user] subst_vars(1466, 1466, [], [])
   Call: (261) [system] var(1466)
^  Redo: (260) [user] subst_vars(1466, _334310, [], _335250)
^  Unify: (260) [user] subst_vars(1466, _334310, [], _335250)
   Call: (261) [system] atom(1466)
^  Redo: (260) [user] subst_vars(1466, _334310, [], _335250)
^  Unify: (260) [user] subst_vars(1466, _334310, [], _335250)
   Call: (261) [system] compound(1466)
^  Redo: (260) [user] subst_vars(1466, _334310, [], _335250)
^  Unify: (260) [user] subst_vars(1466, 1466, [], [])
^  Exit: (260) [user] subst_vars(1466, 1466, [], [])
^  Call: (260) [user] subst_vars([0], _334312, [], _303502)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _334312, [], _303502)
^  Unify: (260) [user] subst_vars([0], [_350182|_350184], [], _303502)
^  Call: (261) [user] subst_vars(0, _350182, [], _351122)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _350182, [], _351122)
^  Unify: (261) [user] subst_vars(0, _350182, [], _351122)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _350182, [], _351122)
^  Unify: (261) [user] subst_vars(0, _350182, [], _351122)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _350182, [], _351122)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _350184, [], _303502)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _350184, [], _303502)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1466, 0], [1466, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            !(empty)", 1466, 0], [";;            !(empty)", 1466, 0], [], [])
   Call: (258) [system] compound_name_arguments(_303500, '$COMMENT', [";;            !(empty)", 1466, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT', [";;            !(empty)", 1466, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            !(empty)", 1466, 0), '$COMMENT'(";;            !(empty)", 1466, 0), [], [])
   Call: (257) [system] _373540=metta_file_buffer(+, '$COMMENT'(";;            !(empty)", 1466, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            !(empty)", 1466, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            !(empty)", 1466, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            !(empty)", 1466, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            !(empty)", 1466, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(empty)", 1466, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(empty)", 1466, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(empty)", 1466, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            !(empty)", 1466, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1467, 0, 52611, '$COMMENT'(";;        \");", 1467, 0), '$stream_position'(52611, 1467, 0, 52645)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        \");", 1467, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        \");", 1467, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        \");", 1467, 0), _426258))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        \");", 1467, 0), _426258))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        \");", 1467, 0), _426258)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        \");", 1467, 0), _426258)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        \");", 1467, 0), _426258)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        \");", 1467, 0), _426258)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        \");", 1467, 0), _431870))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        \");", 1467, 0), _431870))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        \");", 1467, 0), _431870))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        \");", 1467, 0), _431870))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        \");", 1467, 0), _431870)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        \");", 1467, 0), _431870)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        \");", 1467, 0), _437456))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        \");", 1467, 0), _437456))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        \");", 1467, 0), _437456)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        \");", 1467, 0), _437456)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1467, 0), _437456)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1467, 0), _437456)
   Call: (270) [system] var('$COMMENT'(";;        \");", 1467, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1467, 0), _437456)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1467, 0), '$VAR'(_444916))
   Call: (270) [system] atom('$COMMENT'(";;        \");", 1467, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1467, 0), _437456)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1467, 0), _437456)
   Call: (270) [system] '$COMMENT'(";;        \");", 1467, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1467, 0), _437456)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1467, 0), _437456)
   Call: (270) [system] '$COMMENT'(";;        \");", 1467, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1467, 0), _437456)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1467, 0), _437456)
   Call: (270) [system] '$COMMENT'(";;        \");", 1467, 0)==[_454196, _454202]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1467, 0), _437456)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1467, 0), _437456)
   Call: (270) [system] is_list('$COMMENT'(";;        \");", 1467, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1467, 0), _437456)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1467, 0), _437456)
   Call: (270) [system] string('$COMMENT'(";;        \");", 1467, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1467, 0), _437456)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1467, 0), _437456)
   Call: (270) [system] compound('$COMMENT'(";;        \");", 1467, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        \");", 1467, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        \");", 1467, 0), _464398, _464400)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        \");", 1467, 0), '$COMMENT', [";;        \");", 1467, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        \");", 1467, 0], _468140)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        \");", 1467, 0], _468140)
   Call: (271) [apply] apply:maplist_([";;        \");", 1467, 0], _468140, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        \");", 1467, 0], [_470958|_470960], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        \");", _470958)
^  Unify: (272) [user] mfix_vars1(";;        \");", _470958)
   Call: (273) [system] var(";;        \");")
^  Redo: (272) [user] mfix_vars1(";;        \");", _470958)
^  Unify: (272) [user] mfix_vars1(";;        \");", '$VAR'(_475604))
   Call: (273) [system] atom(";;        \");")
^  Redo: (272) [user] mfix_vars1(";;        \");", _470958)
^  Unify: (272) [user] mfix_vars1(";;        \");", _470958)
   Call: (273) [system] ";;        \");"==true
^  Redo: (272) [user] mfix_vars1(";;        \");", _470958)
^  Unify: (272) [user] mfix_vars1(";;        \");", _470958)
   Call: (273) [system] ";;        \");"==false
^  Redo: (272) [user] mfix_vars1(";;        \");", _470958)
^  Unify: (272) [user] mfix_vars1(";;        \");", _470958)
   Call: (273) [system] ";;        \");"==[_484884, _484890]
^  Redo: (272) [user] mfix_vars1(";;        \");", _470958)
^  Unify: (272) [user] mfix_vars1(";;        \");", _470958)
   Call: (273) [system] is_list(";;        \");")
^  Redo: (272) [user] mfix_vars1(";;        \");", _470958)
^  Unify: (272) [user] mfix_vars1(";;        \");", _470958)
   Call: (273) [system] string(";;        \");")
   Exit: (273) [system] string(";;        \");")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        \");", _470958)
^  Unify: (272) [user] mfix_vars1(";;        \");", _470958)
   Call: (273) [system] compound(";;        \");")
^  Redo: (272) [user] mfix_vars1(";;        \");", _470958)
^  Unify: (272) [user] mfix_vars1(";;        \");", _470958)
^  Call: (273) [user] symbol(";;        \");")
^  Unify: (273) [user] symbol(";;        \");")
   Call: (274) [system] atom(";;        \");")
   Fail: (274) [system] atom(";;        \");")
^  Fail: (273) [user] symbol(";;        \");")
^  Redo: (272) [user] mfix_vars1(";;        \");", _470958)
   Call: (273) [system] ";;        \");"=_470958
   Exit: (273) [system] ";;        \");"=";;        \");"
^  Exit: (272) [user] mfix_vars1(";;        \");", ";;        \");")
   Call: (272) [apply] apply:maplist_([1467, 0], _470960, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1467, 0], [_508956|_508958], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1467, _508956)
^  Unify: (273) [user] mfix_vars1(1467, _508956)
   Call: (274) [system] var(1467)
^  Redo: (273) [user] mfix_vars1(1467, _508956)
^  Unify: (273) [user] mfix_vars1(1467, '$VAR'(_513602))
   Call: (274) [system] atom(1467)
^  Redo: (273) [user] mfix_vars1(1467, _508956)
^  Unify: (273) [user] mfix_vars1(1467, _508956)
   Call: (274) [system] 1467==true
^  Redo: (273) [user] mfix_vars1(1467, _508956)
^  Unify: (273) [user] mfix_vars1(1467, _508956)
   Call: (274) [system] 1467==false
^  Redo: (273) [user] mfix_vars1(1467, _508956)
^  Unify: (273) [user] mfix_vars1(1467, _508956)
   Call: (274) [system] 1467==[_522882, _522888]
^  Redo: (273) [user] mfix_vars1(1467, _6030)
^  Unify: (273) [user] mfix_vars1(1467, _6030)
   Call: (274) [system] is_list(1467)
^  Redo: (273) [user] mfix_vars1(1467, _6030)
^  Unify: (273) [user] mfix_vars1(1467, _6030)
   Call: (274) [system] string(1467)
^  Redo: (273) [user] mfix_vars1(1467, _6030)
^  Unify: (273) [user] mfix_vars1(1467, _6030)
   Call: (274) [system] compound(1467)
^  Redo: (273) [user] mfix_vars1(1467, _6030)
^  Unify: (273) [user] mfix_vars1(1467, _6030)
^  Call: (274) [user] symbol(1467)
^  Unify: (274) [user] symbol(1467)
   Call: (275) [system] atom(1467)
   Fail: (275) [system] atom(1467)
^  Fail: (274) [user] symbol(1467)
^  Redo: (273) [user] mfix_vars1(1467, _6030)
   Call: (274) [system] 1467=_6030
   Exit: (274) [system] 1467=1467
^  Exit: (273) [user] mfix_vars1(1467, 1467)
   Call: (273) [apply] apply:maplist_([0], _6032, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_25316|_25318], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _25316)
^  Unify: (274) [user] mfix_vars1(0, _25316)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _25316)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_29962))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _25316)
^  Unify: (274) [user] mfix_vars1(0, _25316)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _25316)
^  Unify: (274) [user] mfix_vars1(0, _25316)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _25316)
^  Unify: (274) [user] mfix_vars1(0, _25316)
   Call: (275) [system] 0==[_39242, _39248]
^  Redo: (274) [user] mfix_vars1(0, _25316)
^  Unify: (274) [user] mfix_vars1(0, _25316)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _25316)
^  Unify: (274) [user] mfix_vars1(0, _25316)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _25316)
^  Unify: (274) [user] mfix_vars1(0, _25316)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _25316)
^  Unify: (274) [user] mfix_vars1(0, _25316)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _25316)
   Call: (275) [system] 0=_25316
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _25318, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1467, 0], [1467, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        \");", 1467, 0], [";;        \");", 1467, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        \");", 1467, 0], [";;        \");", 1467, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";;        \");", 1467, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        \");", 1467, 0), '$COMMENT', [";;        \");", 1467, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0)))
   Call: (267) [system] '$COMMENT'(";;        \");", 1467, 0)\=@='$COMMENT'(";;        \");", 1467, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        \");", 1467, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        \");", 1467, 0), _75490))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        \");", 1467, 0), _75490))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        \");", 1467, 0), _75490))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        \");", 1467, 0), _75490))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        \");", 1467, 0), _75490)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        \");", 1467, 0), _75490)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        \");", 1467, 0), _81076))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        \");", 1467, 0), _81076))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        \");", 1467, 0), _81076)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        \");", 1467, 0), _81076)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        \");", 1467, 0), _81076)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0)))
   Call: (267) [system] '$COMMENT'(";;        \");", 1467, 0)\=@='$COMMENT'(";;        \");", 1467, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        \");", 1467, 0), _75490)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        \");", 1467, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        \");", 1467, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        \");", 1467, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        \");", 1467, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        \");", 1467, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        \");", 1467, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        \");", 1467, 0), _103396))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        \");", 1467, 0), _103396))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        \");", 1467, 0), _103396)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        \");", 1467, 0), _103396)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        \");", 1467, 0), _103396)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0)))
   Call: (267) [system] '$COMMENT'(";;        \");", 1467, 0)\=@='$COMMENT'(";;        \");", 1467, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        \");", 1467, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0)))
   Call: (261) [system] '$COMMENT'(";;        \");", 1467, 0)\=@='$COMMENT'(";;        \");", 1467, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        \");", 1467, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        \");", 1467, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        \");", 1467, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        \");", 1467, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        \");", 1467, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        \");", 1467, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        \");", 1467, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        \");", 1467, 0), _132174, [], _132176)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        \");", 1467, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        \");", 1467, 0), _132174, [], _132176)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        \");", 1467, 0), _132174, [], _132176)
   Call: (258) [system] atom('$COMMENT'(";;        \");", 1467, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        \");", 1467, 0), _132174, [], _132176)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        \");", 1467, 0), _132174, [], _132176)
   Call: (258) [system] compound('$COMMENT'(";;        \");", 1467, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        \");", 1467, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        \");", 1467, 0), _141490, _141492)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        \");", 1467, 0), '$COMMENT', [";;        \");", 1467, 0])
^  Call: (258) [user] subst_vars([";;        \");", 1467, 0], _143376, [], _132176)
^  Unify: (258) [user] subst_vars([";;        \");", 1467, 0], [";;        \");", 1467, 0], [], [])
   Call: (259) [system] var([";;        \");", 1467, 0])
^  Redo: (258) [user] subst_vars([";;        \");", 1467, 0], _143376, [], _132176)
^  Unify: (258) [user] subst_vars([";;        \");", 1467, 0], [_147112|_147114], [], _132176)
^  Call: (259) [user] subst_vars(";;        \");", _147112, [], _148052)
^  Unify: (259) [user] subst_vars(";;        \");", ";;        \");", [], [])
   Call: (260) [system] var(";;        \");")
^  Redo: (259) [user] subst_vars(";;        \");", _147112, [], _148052)
^  Unify: (259) [user] subst_vars(";;        \");", _147112, [], _148052)
   Call: (260) [system] atom(";;        \");")
^  Redo: (259) [user] subst_vars(";;        \");", _147112, [], _148052)
^  Unify: (259) [user] subst_vars(";;        \");", _147112, [], _148052)
   Call: (260) [system] compound(";;        \");")
^  Redo: (259) [user] subst_vars(";;        \");", _147112, [], _148052)
^  Unify: (259) [user] subst_vars(";;        \");", ";;        \");", [], [])
^  Exit: (259) [user] subst_vars(";;        \");", ";;        \");", [], [])
^  Call: (259) [user] subst_vars([1467, 0], _147114, [], _132176)
^  Unify: (259) [user] subst_vars([1467, 0], [1467, 0], [], [])
   Call: (260) [system] var([1467, 0])
^  Redo: (259) [user] subst_vars([1467, 0], _147114, [], _132176)
^  Unify: (259) [user] subst_vars([1467, 0], [_162984|_162986], [], _132176)
^  Call: (260) [user] subst_vars(1467, _162984, [], _163924)
^  Unify: (260) [user] subst_vars(1467, 1467, [], [])
   Call: (261) [system] var(1467)
^  Redo: (260) [user] subst_vars(1467, _162984, [], _163924)
^  Unify: (260) [user] subst_vars(1467, _162984, [], _163924)
   Call: (261) [system] atom(1467)
^  Redo: (260) [user] subst_vars(1467, _162984, [], _163924)
^  Unify: (260) [user] subst_vars(1467, _162984, [], _163924)
   Call: (261) [system] compound(1467)
^  Redo: (260) [user] subst_vars(1467, _162984, [], _163924)
^  Unify: (260) [user] subst_vars(1467, 1467, [], [])
^  Exit: (260) [user] subst_vars(1467, 1467, [], [])
^  Call: (260) [user] subst_vars([0], _162986, [], _132176)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _162986, [], _132176)
^  Unify: (260) [user] subst_vars([0], [_178856|_178858], [], _132176)
^  Call: (261) [user] subst_vars(0, _178856, [], _179796)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _178856, [], _179796)
^  Unify: (261) [user] subst_vars(0, _178856, [], _179796)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _178856, [], _179796)
^  Unify: (261) [user] subst_vars(0, _178856, [], _179796)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _178856, [], _179796)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _178858, [], _132176)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _178858, [], _132176)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1467, 0], [1467, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        \");", 1467, 0], [";;        \");", 1467, 0], [], [])
   Call: (258) [system] compound_name_arguments(_132174, '$COMMENT', [";;        \");", 1467, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        \");", 1467, 0), '$COMMENT', [";;        \");", 1467, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        \");", 1467, 0), '$COMMENT'(";;        \");", 1467, 0), [], [])
   Call: (257) [system] _202214=metta_file_buffer(+, '$COMMENT'(";;        \");", 1467, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        \");", 1467, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        \");", 1467, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        \");", 1467, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        \");", 1467, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        \");", 1467, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        \");", 1467, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        \");", 1467, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        \");", 1467, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1468, 0, 52625, '$COMMENT'(";;", 1468, 0), '$stream_position'(52625, 1468, 0, 52659)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1468, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1468, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1468, 0), _254930))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1468, 0), _254930))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1468, 0), _254930)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1468, 0), _254930)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1468, 0), _254930)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1468, 0), _254930)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1468, 0), _260542))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1468, 0), _260542))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1468, 0), _260542))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1468, 0), _260542))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1468, 0), _260542)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1468, 0), _260542)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1468, 0), _266128))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1468, 0), _266128))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1468, 0), _266128)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1468, 0), _266128)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1468, 0), _266128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1468, 0), _266128)
   Call: (270) [system] var('$COMMENT'(";;", 1468, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1468, 0), _266128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1468, 0), '$VAR'(_273588))
   Call: (270) [system] atom('$COMMENT'(";;", 1468, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1468, 0), _266128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1468, 0), _266128)
   Call: (270) [system] '$COMMENT'(";;", 1468, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1468, 0), _266128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1468, 0), _266128)
   Call: (270) [system] '$COMMENT'(";;", 1468, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1468, 0), _266128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1468, 0), _266128)
   Call: (270) [system] '$COMMENT'(";;", 1468, 0)==[_282868, _282874]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1468, 0), _266128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1468, 0), _266128)
   Call: (270) [system] is_list('$COMMENT'(";;", 1468, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1468, 0), _266128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1468, 0), _266128)
   Call: (270) [system] string('$COMMENT'(";;", 1468, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1468, 0), _266128)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1468, 0), _266128)
   Call: (270) [system] compound('$COMMENT'(";;", 1468, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1468, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1468, 0), _293070, _293072)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1468, 0), '$COMMENT', [";;", 1468, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1468, 0], _296812)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1468, 0], _296812)
   Call: (271) [apply] apply:maplist_([";;", 1468, 0], _296812, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1468, 0], [_299630|_299632], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _299630)
^  Unify: (272) [user] mfix_vars1(";;", _299630)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _299630)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_304276))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _299630)
^  Unify: (272) [user] mfix_vars1(";;", _299630)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _299630)
^  Unify: (272) [user] mfix_vars1(";;", _299630)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _299630)
^  Unify: (272) [user] mfix_vars1(";;", _299630)
   Call: (273) [system] ";;"==[_313556, _313562]
^  Redo: (272) [user] mfix_vars1(";;", _299630)
^  Unify: (272) [user] mfix_vars1(";;", _299630)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _299630)
^  Unify: (272) [user] mfix_vars1(";;", _299630)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _299630)
^  Unify: (272) [user] mfix_vars1(";;", _299630)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _299630)
^  Unify: (272) [user] mfix_vars1(";;", _299630)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _299630)
   Call: (273) [system] ";;"=_299630
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1468, 0], _299632, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1468, 0], [_337628|_337630], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1468, _337628)
^  Unify: (273) [user] mfix_vars1(1468, _337628)
   Call: (274) [system] var(1468)
^  Redo: (273) [user] mfix_vars1(1468, _337628)
^  Unify: (273) [user] mfix_vars1(1468, '$VAR'(_342274))
   Call: (274) [system] atom(1468)
^  Redo: (273) [user] mfix_vars1(1468, _337628)
^  Unify: (273) [user] mfix_vars1(1468, _337628)
   Call: (274) [system] 1468==true
^  Redo: (273) [user] mfix_vars1(1468, _337628)
^  Unify: (273) [user] mfix_vars1(1468, _337628)
   Call: (274) [system] 1468==false
^  Redo: (273) [user] mfix_vars1(1468, _337628)
^  Unify: (273) [user] mfix_vars1(1468, _337628)
   Call: (274) [system] 1468==[_351554, _351560]
^  Redo: (273) [user] mfix_vars1(1468, _337628)
^  Unify: (273) [user] mfix_vars1(1468, _337628)
   Call: (274) [system] is_list(1468)
^  Redo: (273) [user] mfix_vars1(1468, _337628)
^  Unify: (273) [user] mfix_vars1(1468, _337628)
   Call: (274) [system] string(1468)
^  Redo: (273) [user] mfix_vars1(1468, _337628)
^  Unify: (273) [user] mfix_vars1(1468, _337628)
   Call: (274) [system] compound(1468)
^  Redo: (273) [user] mfix_vars1(1468, _337628)
^  Unify: (273) [user] mfix_vars1(1468, _337628)
^  Call: (274) [user] symbol(1468)
^  Unify: (274) [user] symbol(1468)
   Call: (275) [system] atom(1468)
   Fail: (275) [system] atom(1468)
^  Fail: (274) [user] symbol(1468)
^  Redo: (273) [user] mfix_vars1(1468, _337628)
   Call: (274) [system] 1468=_337628
   Exit: (274) [system] 1468=1468
^  Exit: (273) [user] mfix_vars1(1468, 1468)
   Call: (273) [apply] apply:maplist_([0], _337630, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_371954|_371956], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _371954)
^  Unify: (274) [user] mfix_vars1(0, _371954)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _371954)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_376600))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _371954)
^  Unify: (274) [user] mfix_vars1(0, _371954)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _371954)
^  Unify: (274) [user] mfix_vars1(0, _371954)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _371954)
^  Unify: (274) [user] mfix_vars1(0, _371954)
   Call: (275) [system] 0==[_385880, _385886]
^  Redo: (274) [user] mfix_vars1(0, _371954)
^  Unify: (274) [user] mfix_vars1(0, _371954)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _371954)
^  Unify: (274) [user] mfix_vars1(0, _371954)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _371954)
^  Unify: (274) [user] mfix_vars1(0, _371954)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _371954)
^  Unify: (274) [user] mfix_vars1(0, _371954)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _371954)
   Call: (275) [system] 0=_371954
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _371956, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1468, 0], [1468, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1468, 0], [";;", 1468, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1468, 0], [";;", 1468, 0])
   Call: (270) [system] compound_name_arguments(_266128, '$COMMENT', [";;", 1468, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1468, 0), '$COMMENT', [";;", 1468, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1468, 0)\=@='$COMMENT'(";;", 1468, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1468, 0), _260542)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1468, 0), _422128))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1468, 0), _422128))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1468, 0), _422128))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1468, 0), _422128))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1468, 0), _422128)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1468, 0), _422128)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1468, 0), _427714))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1468, 0), _427714))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1468, 0), _427714)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1468, 0), _427714)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1468, 0), _427714)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1468, 0)\=@='$COMMENT'(";;", 1468, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1468, 0), _422128)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1468, 0), _254930))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1468, 0), _254930))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1468, 0), _254930))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1468, 0), _254930))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1468, 0), _254930)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1468, 0), _254930)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1468, 0), _450034))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1468, 0), _450034))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1468, 0), _450034)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1468, 0), _450034)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1468, 0), _450034)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1468, 0)\=@='$COMMENT'(";;", 1468, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1468, 0), _254930)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1468, 0)\=@='$COMMENT'(";;", 1468, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1468, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1468, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1468, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1468, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1468, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1468, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1468, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1468, 0), _478812, [], _478814)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1468, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1468, 0), _478812, [], _478814)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1468, 0), _478812, [], _478814)
   Call: (258) [system] atom('$COMMENT'(";;", 1468, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1468, 0), _478812, [], _478814)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1468, 0), _478812, [], _478814)
   Call: (258) [system] compound('$COMMENT'(";;", 1468, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1468, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1468, 0), _488128, _488130)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1468, 0), '$COMMENT', [";;", 1468, 0])
^  Call: (258) [user] subst_vars([";;", 1468, 0], _490014, [], _478814)
^  Unify: (258) [user] subst_vars([";;", 1468, 0], [";;", 1468, 0], [], [])
   Call: (259) [system] var([";;", 1468, 0])
^  Redo: (258) [user] subst_vars([";;", 1468, 0], _490014, [], _478814)
^  Unify: (258) [user] subst_vars([";;", 1468, 0], [_493750|_493752], [], _478814)
^  Call: (259) [user] subst_vars(";;", _493750, [], _494690)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _493750, [], _494690)
^  Unify: (259) [user] subst_vars(";;", _493750, [], _494690)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _493750, [], _494690)
^  Unify: (259) [user] subst_vars(";;", _493750, [], _494690)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _493750, [], _494690)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1468, 0], _493752, [], _478814)
^  Unify: (259) [user] subst_vars([1468, 0], [1468, 0], [], [])
   Call: (260) [system] var([1468, 0])
^  Redo: (259) [user] subst_vars([1468, 0], _493752, [], _478814)
^  Unify: (259) [user] subst_vars([1468, 0], [_509622|_509624], [], _478814)
^  Call: (260) [user] subst_vars(1468, _509622, [], _510562)
^  Unify: (260) [user] subst_vars(1468, 1468, [], [])
   Call: (261) [system] var(1468)
^  Redo: (260) [user] subst_vars(1468, _509622, [], _510562)
^  Unify: (260) [user] subst_vars(1468, _509622, [], _510562)
   Call: (261) [system] atom(1468)
^  Redo: (260) [user] subst_vars(1468, _509622, [], _510562)
^  Unify: (260) [user] subst_vars(1468, _509622, [], _510562)
   Call: (261) [system] compound(1468)
^  Redo: (260) [user] subst_vars(1468, _509622, [], _510562)
^  Unify: (260) [user] subst_vars(1468, 1468, [], [])
^  Exit: (260) [user] subst_vars(1468, 1468, [], [])
^  Call: (260) [user] subst_vars([0], _509624, [], _478814)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _5976, [], _5938)
^  Unify: (260) [user] subst_vars([0], [_7538|_7540], [], _5938)
^  Call: (261) [user] subst_vars(0, _7538, [], _8478)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _7538, [], _8478)
^  Unify: (261) [user] subst_vars(0, _7538, [], _8478)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _7538, [], _8478)
^  Unify: (261) [user] subst_vars(0, _7538, [], _8478)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _7538, [], _8478)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _7540, [], _5938)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _7540, [], _5938)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1468, 0], [1468, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1468, 0], [";;", 1468, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5936, '$COMMENT', [";;", 1468, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1468, 0), '$COMMENT', [";;", 1468, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1468, 0), '$COMMENT'(";;", 1468, 0), [], [])
   Call: (257) [system] _30896=metta_file_buffer(+, '$COMMENT'(";;", 1468, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1468, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1468, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1468, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1468, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1468, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1468, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1468, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1468, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1469, 0, 52628, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$stream_position'(52628, 1469, 0, 52662)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _83624))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _83624))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _83624)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _83624)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _83624)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _83624)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _89236))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _89236))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _89236))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _89236))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _89236)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _89236)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _94822))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _94822))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _94822)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _94822)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _94822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _94822)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _94822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$VAR'(_102282))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _94822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _94822)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _94822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _94822)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _94822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _94822)
   Call: (270) [system] '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0)==[_111562, _111568]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _94822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _94822)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _94822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _94822)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _94822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _94822)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _121764, _121766)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT', [";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0], _125506)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0], _125506)
   Call: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0], _125506, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0], [_128324|_128326], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _128324)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _128324)
   Call: (273) [system] var(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _128324)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", '$VAR'(_132970))
   Call: (273) [system] atom(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _128324)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _128324)
   Call: (273) [system] ";;        assert_eq_metta_results!(metta.run(parser),"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _128324)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _128324)
   Call: (273) [system] ";;        assert_eq_metta_results!(metta.run(parser),"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _128324)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _128324)
   Call: (273) [system] ";;        assert_eq_metta_results!(metta.run(parser),"==[_142250, _142256]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _128324)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _128324)
   Call: (273) [system] is_list(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _128324)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _128324)
   Call: (273) [system] string(";;        assert_eq_metta_results!(metta.run(parser),")
   Exit: (273) [system] string(";;        assert_eq_metta_results!(metta.run(parser),")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _128324)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _128324)
   Call: (273) [system] compound(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _128324)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _128324)
^  Call: (273) [user] symbol(";;        assert_eq_metta_results!(metta.run(parser),")
^  Unify: (273) [user] symbol(";;        assert_eq_metta_results!(metta.run(parser),")
   Call: (274) [system] atom(";;        assert_eq_metta_results!(metta.run(parser),")
   Fail: (274) [system] atom(";;        assert_eq_metta_results!(metta.run(parser),")
^  Fail: (273) [user] symbol(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", _128324)
   Call: (273) [system] ";;        assert_eq_metta_results!(metta.run(parser),"=_128324
   Exit: (273) [system] ";;        assert_eq_metta_results!(metta.run(parser),"=";;        assert_eq_metta_results!(metta.run(parser),"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq_metta_results!(metta.run(parser),", ";;        assert_eq_metta_results!(metta.run(parser),")
   Call: (272) [apply] apply:maplist_([1469, 0], _128326, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1469, 0], [_166322|_166324], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1469, _166322)
^  Unify: (273) [user] mfix_vars1(1469, _166322)
   Call: (274) [system] var(1469)
^  Redo: (273) [user] mfix_vars1(1469, _166322)
^  Unify: (273) [user] mfix_vars1(1469, '$VAR'(_170968))
   Call: (274) [system] atom(1469)
^  Redo: (273) [user] mfix_vars1(1469, _166322)
^  Unify: (273) [user] mfix_vars1(1469, _166322)
   Call: (274) [system] 1469==true
^  Redo: (273) [user] mfix_vars1(1469, _166322)
^  Unify: (273) [user] mfix_vars1(1469, _166322)
   Call: (274) [system] 1469==false
^  Redo: (273) [user] mfix_vars1(1469, _166322)
^  Unify: (273) [user] mfix_vars1(1469, _166322)
   Call: (274) [system] 1469==[_180248, _180254]
^  Redo: (273) [user] mfix_vars1(1469, _166322)
^  Unify: (273) [user] mfix_vars1(1469, _166322)
   Call: (274) [system] is_list(1469)
^  Redo: (273) [user] mfix_vars1(1469, _166322)
^  Unify: (273) [user] mfix_vars1(1469, _166322)
   Call: (274) [system] string(1469)
^  Redo: (273) [user] mfix_vars1(1469, _166322)
^  Unify: (273) [user] mfix_vars1(1469, _166322)
   Call: (274) [system] compound(1469)
^  Redo: (273) [user] mfix_vars1(1469, _166322)
^  Unify: (273) [user] mfix_vars1(1469, _166322)
^  Call: (274) [user] symbol(1469)
^  Unify: (274) [user] symbol(1469)
   Call: (275) [system] atom(1469)
   Fail: (275) [system] atom(1469)
^  Fail: (274) [user] symbol(1469)
^  Redo: (273) [user] mfix_vars1(1469, _166322)
   Call: (274) [system] 1469=_166322
   Exit: (274) [system] 1469=1469
^  Exit: (273) [user] mfix_vars1(1469, 1469)
   Call: (273) [apply] apply:maplist_([0], _166324, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_200648|_200650], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _200648)
^  Unify: (274) [user] mfix_vars1(0, _200648)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _200648)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_205294))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _200648)
^  Unify: (274) [user] mfix_vars1(0, _200648)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _200648)
^  Unify: (274) [user] mfix_vars1(0, _200648)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _200648)
^  Unify: (274) [user] mfix_vars1(0, _200648)
   Call: (275) [system] 0==[_214574, _214580]
^  Redo: (274) [user] mfix_vars1(0, _200648)
^  Unify: (274) [user] mfix_vars1(0, _200648)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _200648)
^  Unify: (274) [user] mfix_vars1(0, _200648)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _200648)
^  Unify: (274) [user] mfix_vars1(0, _200648)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _200648)
^  Unify: (274) [user] mfix_vars1(0, _200648)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _200648)
   Call: (275) [system] 0=_200648
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _200650, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1469, 0], [1469, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0], [";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0], [";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0])
   Call: (270) [system] compound_name_arguments(_94822, '$COMMENT', [";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT', [";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _89236)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _250822))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _250822))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _250822))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _250822))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _250822)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _250822)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _256408))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _256408))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _256408)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _256408)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _256408)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _250822)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _83624))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _83624))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _83624))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _83624))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _83624)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _83624)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _278728))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _278728))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _278728)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _278728)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _278728)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _83624)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0)\=@='$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _307506, [], _307508)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _307506, [], _307508)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _307506, [], _307508)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _307506, [], _307508)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _307506, [], _307508)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), _316822, _316824)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT', [";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0], _318708, [], _307508)
^  Unify: (258) [user] subst_vars([";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0], [";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0], [], [])
   Call: (259) [system] var([";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0], _318708, [], _307508)
^  Unify: (258) [user] subst_vars([";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0], [_322444|_322446], [], _307508)
^  Call: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", _322444, [], _323384)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", ";;        assert_eq_metta_results!(metta.run(parser),", [], [])
   Call: (260) [system] var(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", _322444, [], _323384)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", _322444, [], _323384)
   Call: (260) [system] atom(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", _322444, [], _323384)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", _322444, [], _323384)
   Call: (260) [system] compound(";;        assert_eq_metta_results!(metta.run(parser),")
^  Redo: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", _322444, [], _323384)
^  Unify: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", ";;        assert_eq_metta_results!(metta.run(parser),", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq_metta_results!(metta.run(parser),", ";;        assert_eq_metta_results!(metta.run(parser),", [], [])
^  Call: (259) [user] subst_vars([1469, 0], _322446, [], _307508)
^  Unify: (259) [user] subst_vars([1469, 0], [1469, 0], [], [])
   Call: (260) [system] var([1469, 0])
^  Redo: (259) [user] subst_vars([1469, 0], _322446, [], _307508)
^  Unify: (259) [user] subst_vars([1469, 0], [_338316|_338318], [], _307508)
^  Call: (260) [user] subst_vars(1469, _338316, [], _339256)
^  Unify: (260) [user] subst_vars(1469, 1469, [], [])
   Call: (261) [system] var(1469)
^  Redo: (260) [user] subst_vars(1469, _338316, [], _339256)
^  Unify: (260) [user] subst_vars(1469, _338316, [], _339256)
   Call: (261) [system] atom(1469)
^  Redo: (260) [user] subst_vars(1469, _338316, [], _339256)
^  Unify: (260) [user] subst_vars(1469, _338316, [], _339256)
   Call: (261) [system] compound(1469)
^  Redo: (260) [user] subst_vars(1469, _338316, [], _339256)
^  Unify: (260) [user] subst_vars(1469, 1469, [], [])
^  Exit: (260) [user] subst_vars(1469, 1469, [], [])
^  Call: (260) [user] subst_vars([0], _338318, [], _307508)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _338318, [], _307508)
^  Unify: (260) [user] subst_vars([0], [_354188|_354190], [], _307508)
^  Call: (261) [user] subst_vars(0, _354188, [], _355128)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _354188, [], _355128)
^  Unify: (261) [user] subst_vars(0, _354188, [], _355128)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _354188, [], _355128)
^  Unify: (261) [user] subst_vars(0, _354188, [], _355128)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _354188, [], _355128)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _354190, [], _307508)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _354190, [], _307508)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1469, 0], [1469, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0], [";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0], [], [])
   Call: (258) [system] compound_name_arguments(_307506, '$COMMENT', [";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT', [";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), [], [])
   Call: (257) [system] _377546=metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq_metta_results!(metta.run(parser),", 1469, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1470, 0, 52682, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$stream_position'(52682, 1470, 0, 52716)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _430270))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _430270))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _430270)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _430270)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _430270)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _430270)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _435882))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _435882))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _435882))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _435882))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _435882)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _435882)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _441468))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _441468))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _441468)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _441468)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _441468)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _441468)
   Call: (270) [system] var('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _441468)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$VAR'(_448928))
   Call: (270) [system] atom('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _441468)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _441468)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _441468)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _441468)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _441468)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _441468)
   Call: (270) [system] '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0)==[_458208, _458214]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _441468)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _441468)
   Call: (270) [system] is_list('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _441468)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _441468)
   Call: (270) [system] string('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _441468)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _441468)
   Call: (270) [system] compound('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _468410, _468412)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT', [";;            Ok(vec![vec![]]));", 1470, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            Ok(vec![vec![]]));", 1470, 0], _472152)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            Ok(vec![vec![]]));", 1470, 0], _472152)
   Call: (271) [apply] apply:maplist_([";;            Ok(vec![vec![]]));", 1470, 0], _472152, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            Ok(vec![vec![]]));", 1470, 0], [_474970|_474972], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            Ok(vec![vec![]]));", _474970)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![vec![]]));", _474970)
   Call: (273) [system] var(";;            Ok(vec![vec![]]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![vec![]]));", _474970)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![vec![]]));", '$VAR'(_479616))
   Call: (273) [system] atom(";;            Ok(vec![vec![]]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![vec![]]));", _474970)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![vec![]]));", _474970)
   Call: (273) [system] ";;            Ok(vec![vec![]]));"==true
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![vec![]]));", _474970)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![vec![]]));", _474970)
   Call: (273) [system] ";;            Ok(vec![vec![]]));"==false
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![vec![]]));", _474970)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![vec![]]));", _474970)
   Call: (273) [system] ";;            Ok(vec![vec![]]));"==[_488896, _488902]
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![vec![]]));", _474970)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![vec![]]));", _474970)
   Call: (273) [system] is_list(";;            Ok(vec![vec![]]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![vec![]]));", _474970)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![vec![]]));", _474970)
   Call: (273) [system] string(";;            Ok(vec![vec![]]));")
   Exit: (273) [system] string(";;            Ok(vec![vec![]]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![vec![]]));", _474970)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![vec![]]));", _474970)
   Call: (273) [system] compound(";;            Ok(vec![vec![]]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![vec![]]));", _474970)
^  Unify: (272) [user] mfix_vars1(";;            Ok(vec![vec![]]));", _474970)
^  Call: (273) [user] symbol(";;            Ok(vec![vec![]]));")
^  Unify: (273) [user] symbol(";;            Ok(vec![vec![]]));")
   Call: (274) [system] atom(";;            Ok(vec![vec![]]));")
   Fail: (274) [system] atom(";;            Ok(vec![vec![]]));")
^  Fail: (273) [user] symbol(";;            Ok(vec![vec![]]));")
^  Redo: (272) [user] mfix_vars1(";;            Ok(vec![vec![]]));", _474970)
   Call: (273) [system] ";;            Ok(vec![vec![]]));"=_474970
   Exit: (273) [system] ";;            Ok(vec![vec![]]));"=";;            Ok(vec![vec![]]));"
^  Exit: (272) [user] mfix_vars1(";;            Ok(vec![vec![]]));", ";;            Ok(vec![vec![]]));")
   Call: (272) [apply] apply:maplist_([1470, 0], _474972, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1470, 0], [_512968|_512970], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1470, _512968)
^  Unify: (273) [user] mfix_vars1(1470, _512968)
   Call: (274) [system] var(1470)
^  Redo: (273) [user] mfix_vars1(1470, _512968)
^  Unify: (273) [user] mfix_vars1(1470, '$VAR'(_517614))
   Call: (274) [system] atom(1470)
^  Redo: (273) [user] mfix_vars1(1470, _512968)
^  Unify: (273) [user] mfix_vars1(1470, _512968)
   Call: (274) [system] 1470==true
^  Redo: (273) [user] mfix_vars1(1470, _512968)
^  Unify: (273) [user] mfix_vars1(1470, _512968)
   Call: (274) [system] 1470==false
^  Redo: (273) [user] mfix_vars1(1470, _6036)
^  Unify: (273) [user] mfix_vars1(1470, _6036)
   Call: (274) [system] 1470==[_8794, _8800]
^  Redo: (273) [user] mfix_vars1(1470, _6036)
^  Unify: (273) [user] mfix_vars1(1470, _6036)
   Call: (274) [system] is_list(1470)
^  Redo: (273) [user] mfix_vars1(1470, _6036)
^  Unify: (273) [user] mfix_vars1(1470, _6036)
   Call: (274) [system] string(1470)
^  Redo: (273) [user] mfix_vars1(1470, _6036)
^  Unify: (273) [user] mfix_vars1(1470, _6036)
   Call: (274) [system] compound(1470)
^  Redo: (273) [user] mfix_vars1(1470, _6036)
^  Unify: (273) [user] mfix_vars1(1470, _6036)
^  Call: (274) [user] symbol(1470)
^  Unify: (274) [user] symbol(1470)
   Call: (275) [system] atom(1470)
   Fail: (275) [system] atom(1470)
^  Fail: (274) [user] symbol(1470)
^  Redo: (273) [user] mfix_vars1(1470, _6036)
   Call: (274) [system] 1470=_6036
   Exit: (274) [system] 1470=1470
^  Exit: (273) [user] mfix_vars1(1470, 1470)
   Call: (273) [apply] apply:maplist_([0], _6038, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_29194|_29196], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _29194)
^  Unify: (274) [user] mfix_vars1(0, _29194)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _29194)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_33840))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _29194)
^  Unify: (274) [user] mfix_vars1(0, _29194)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _29194)
^  Unify: (274) [user] mfix_vars1(0, _29194)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _29194)
^  Unify: (274) [user] mfix_vars1(0, _29194)
   Call: (275) [system] 0==[_43120, _43126]
^  Redo: (274) [user] mfix_vars1(0, _29194)
^  Unify: (274) [user] mfix_vars1(0, _29194)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _29194)
^  Unify: (274) [user] mfix_vars1(0, _29194)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _29194)
^  Unify: (274) [user] mfix_vars1(0, _29194)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _29194)
^  Unify: (274) [user] mfix_vars1(0, _29194)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _29194)
   Call: (275) [system] 0=_29194
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _29196, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1470, 0], [1470, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            Ok(vec![vec![]]));", 1470, 0], [";;            Ok(vec![vec![]]));", 1470, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            Ok(vec![vec![]]));", 1470, 0], [";;            Ok(vec![vec![]]));", 1470, 0])
   Call: (270) [system] compound_name_arguments(_5984, '$COMMENT', [";;            Ok(vec![vec![]]));", 1470, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT', [";;            Ok(vec![vec![]]));", 1470, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0)\=@='$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _5970)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _79368))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _79368))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _79368))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _79368))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _79368)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _79368)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _84954))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _84954))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _84954)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _84954)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _84954)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0)\=@='$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _79368)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _107274))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _107274))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _107274)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _107274)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _107274)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0)))
   Call: (267) [system] '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0)\=@='$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0)))
   Call: (261) [system] '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0)\=@='$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _136052, [], _136054)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _136052, [], _136054)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _136052, [], _136054)
   Call: (258) [system] atom('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _136052, [], _136054)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _136052, [], _136054)
   Call: (258) [system] compound('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), _145368, _145370)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT', [";;            Ok(vec![vec![]]));", 1470, 0])
^  Call: (258) [user] subst_vars([";;            Ok(vec![vec![]]));", 1470, 0], _147254, [], _136054)
^  Unify: (258) [user] subst_vars([";;            Ok(vec![vec![]]));", 1470, 0], [";;            Ok(vec![vec![]]));", 1470, 0], [], [])
   Call: (259) [system] var([";;            Ok(vec![vec![]]));", 1470, 0])
^  Redo: (258) [user] subst_vars([";;            Ok(vec![vec![]]));", 1470, 0], _147254, [], _136054)
^  Unify: (258) [user] subst_vars([";;            Ok(vec![vec![]]));", 1470, 0], [_150990|_150992], [], _136054)
^  Call: (259) [user] subst_vars(";;            Ok(vec![vec![]]));", _150990, [], _151930)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![vec![]]));", ";;            Ok(vec![vec![]]));", [], [])
   Call: (260) [system] var(";;            Ok(vec![vec![]]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![vec![]]));", _150990, [], _151930)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![vec![]]));", _150990, [], _151930)
   Call: (260) [system] atom(";;            Ok(vec![vec![]]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![vec![]]));", _150990, [], _151930)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![vec![]]));", _150990, [], _151930)
   Call: (260) [system] compound(";;            Ok(vec![vec![]]));")
^  Redo: (259) [user] subst_vars(";;            Ok(vec![vec![]]));", _150990, [], _151930)
^  Unify: (259) [user] subst_vars(";;            Ok(vec![vec![]]));", ";;            Ok(vec![vec![]]));", [], [])
^  Exit: (259) [user] subst_vars(";;            Ok(vec![vec![]]));", ";;            Ok(vec![vec![]]));", [], [])
^  Call: (259) [user] subst_vars([1470, 0], _150992, [], _136054)
^  Unify: (259) [user] subst_vars([1470, 0], [1470, 0], [], [])
   Call: (260) [system] var([1470, 0])
^  Redo: (259) [user] subst_vars([1470, 0], _150992, [], _136054)
^  Unify: (259) [user] subst_vars([1470, 0], [_166862|_166864], [], _136054)
^  Call: (260) [user] subst_vars(1470, _166862, [], _167802)
^  Unify: (260) [user] subst_vars(1470, 1470, [], [])
   Call: (261) [system] var(1470)
^  Redo: (260) [user] subst_vars(1470, _166862, [], _167802)
^  Unify: (260) [user] subst_vars(1470, _166862, [], _167802)
   Call: (261) [system] atom(1470)
^  Redo: (260) [user] subst_vars(1470, _166862, [], _167802)
^  Unify: (260) [user] subst_vars(1470, _166862, [], _167802)
   Call: (261) [system] compound(1470)
^  Redo: (260) [user] subst_vars(1470, _166862, [], _167802)
^  Unify: (260) [user] subst_vars(1470, 1470, [], [])
^  Exit: (260) [user] subst_vars(1470, 1470, [], [])
^  Call: (260) [user] subst_vars([0], _166864, [], _136054)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _166864, [], _136054)
^  Unify: (260) [user] subst_vars([0], [_182734|_182736], [], _136054)
^  Call: (261) [user] subst_vars(0, _182734, [], _183674)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _182734, [], _183674)
^  Unify: (261) [user] subst_vars(0, _182734, [], _183674)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _182734, [], _183674)
^  Unify: (261) [user] subst_vars(0, _182734, [], _183674)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _182734, [], _183674)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _182736, [], _136054)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _182736, [], _136054)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1470, 0], [1470, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            Ok(vec![vec![]]));", 1470, 0], [";;            Ok(vec![vec![]]));", 1470, 0], [], [])
   Call: (258) [system] compound_name_arguments(_136052, '$COMMENT', [";;            Ok(vec![vec![]]));", 1470, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT', [";;            Ok(vec![vec![]]));", 1470, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), [], [])
   Call: (257) [system] _206092=metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Ok(vec![vec![]]));", 1470, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1471, 0, 52715, '$COMMENT'(";;    }", 1471, 0), '$stream_position'(52715, 1471, 0, 52749)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1471, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1471, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    }", 1471, 0), _258810))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1471, 0), _258810))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    }", 1471, 0), _258810)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1471, 0), _258810)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1471, 0), _258810)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1471, 0), _258810)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    }", 1471, 0), _264422))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1471, 0), _264422))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1471, 0), _264422))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1471, 0), _264422))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1471, 0), _264422)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1471, 0), _264422)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    }", 1471, 0), _270008))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1471, 0), _270008))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    }", 1471, 0), _270008)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1471, 0), _270008)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1471, 0), _270008)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1471, 0), _270008)
   Call: (270) [system] var('$COMMENT'(";;    }", 1471, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1471, 0), _270008)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1471, 0), '$VAR'(_277468))
   Call: (270) [system] atom('$COMMENT'(";;    }", 1471, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1471, 0), _270008)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1471, 0), _270008)
   Call: (270) [system] '$COMMENT'(";;    }", 1471, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1471, 0), _270008)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1471, 0), _270008)
   Call: (270) [system] '$COMMENT'(";;    }", 1471, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1471, 0), _270008)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1471, 0), _270008)
   Call: (270) [system] '$COMMENT'(";;    }", 1471, 0)==[_286748, _286754]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1471, 0), _270008)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1471, 0), _270008)
   Call: (270) [system] is_list('$COMMENT'(";;    }", 1471, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1471, 0), _270008)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1471, 0), _270008)
   Call: (270) [system] string('$COMMENT'(";;    }", 1471, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1471, 0), _270008)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1471, 0), _270008)
   Call: (270) [system] compound('$COMMENT'(";;    }", 1471, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    }", 1471, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1471, 0), _296950, _296952)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1471, 0), '$COMMENT', [";;    }", 1471, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    }", 1471, 0], _300692)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1471, 0], _300692)
   Call: (271) [apply] apply:maplist_([";;    }", 1471, 0], _300692, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    }", 1471, 0], [_303510|_303512], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    }", _303510)
^  Unify: (272) [user] mfix_vars1(";;    }", _303510)
   Call: (273) [system] var(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _303510)
^  Unify: (272) [user] mfix_vars1(";;    }", '$VAR'(_308156))
   Call: (273) [system] atom(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _303510)
^  Unify: (272) [user] mfix_vars1(";;    }", _303510)
   Call: (273) [system] ";;    }"==true
^  Redo: (272) [user] mfix_vars1(";;    }", _303510)
^  Unify: (272) [user] mfix_vars1(";;    }", _303510)
   Call: (273) [system] ";;    }"==false
^  Redo: (272) [user] mfix_vars1(";;    }", _303510)
^  Unify: (272) [user] mfix_vars1(";;    }", _303510)
   Call: (273) [system] ";;    }"==[_317436, _317442]
^  Redo: (272) [user] mfix_vars1(";;    }", _303510)
^  Unify: (272) [user] mfix_vars1(";;    }", _303510)
   Call: (273) [system] is_list(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _303510)
^  Unify: (272) [user] mfix_vars1(";;    }", _303510)
   Call: (273) [system] string(";;    }")
   Exit: (273) [system] string(";;    }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    }", _303510)
^  Unify: (272) [user] mfix_vars1(";;    }", _303510)
   Call: (273) [system] compound(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _303510)
^  Unify: (272) [user] mfix_vars1(";;    }", _303510)
^  Call: (273) [user] symbol(";;    }")
^  Unify: (273) [user] symbol(";;    }")
   Call: (274) [system] atom(";;    }")
   Fail: (274) [system] atom(";;    }")
^  Fail: (273) [user] symbol(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _303510)
   Call: (273) [system] ";;    }"=_303510
   Exit: (273) [system] ";;    }"=";;    }"
^  Exit: (272) [user] mfix_vars1(";;    }", ";;    }")
   Call: (272) [apply] apply:maplist_([1471, 0], _303512, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1471, 0], [_341508|_341510], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1471, _341508)
^  Unify: (273) [user] mfix_vars1(1471, _341508)
   Call: (274) [system] var(1471)
^  Redo: (273) [user] mfix_vars1(1471, _341508)
^  Unify: (273) [user] mfix_vars1(1471, '$VAR'(_346154))
   Call: (274) [system] atom(1471)
^  Redo: (273) [user] mfix_vars1(1471, _341508)
^  Unify: (273) [user] mfix_vars1(1471, _341508)
   Call: (274) [system] 1471==true
^  Redo: (273) [user] mfix_vars1(1471, _341508)
^  Unify: (273) [user] mfix_vars1(1471, _341508)
   Call: (274) [system] 1471==false
^  Redo: (273) [user] mfix_vars1(1471, _341508)
^  Unify: (273) [user] mfix_vars1(1471, _341508)
   Call: (274) [system] 1471==[_355434, _355440]
^  Redo: (273) [user] mfix_vars1(1471, _341508)
^  Unify: (273) [user] mfix_vars1(1471, _341508)
   Call: (274) [system] is_list(1471)
^  Redo: (273) [user] mfix_vars1(1471, _341508)
^  Unify: (273) [user] mfix_vars1(1471, _341508)
   Call: (274) [system] string(1471)
^  Redo: (273) [user] mfix_vars1(1471, _341508)
^  Unify: (273) [user] mfix_vars1(1471, _341508)
   Call: (274) [system] compound(1471)
^  Redo: (273) [user] mfix_vars1(1471, _341508)
^  Unify: (273) [user] mfix_vars1(1471, _341508)
^  Call: (274) [user] symbol(1471)
^  Unify: (274) [user] symbol(1471)
   Call: (275) [system] atom(1471)
   Fail: (275) [system] atom(1471)
^  Fail: (274) [user] symbol(1471)
^  Redo: (273) [user] mfix_vars1(1471, _341508)
   Call: (274) [system] 1471=_341508
   Exit: (274) [system] 1471=1471
^  Exit: (273) [user] mfix_vars1(1471, 1471)
   Call: (273) [apply] apply:maplist_([0], _341510, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_375834|_375836], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _375834)
^  Unify: (274) [user] mfix_vars1(0, _375834)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _375834)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_380480))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _375834)
^  Unify: (274) [user] mfix_vars1(0, _375834)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _375834)
^  Unify: (274) [user] mfix_vars1(0, _375834)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _375834)
^  Unify: (274) [user] mfix_vars1(0, _375834)
   Call: (275) [system] 0==[_389760, _389766]
^  Redo: (274) [user] mfix_vars1(0, _375834)
^  Unify: (274) [user] mfix_vars1(0, _375834)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _375834)
^  Unify: (274) [user] mfix_vars1(0, _375834)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _375834)
^  Unify: (274) [user] mfix_vars1(0, _375834)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _375834)
^  Unify: (274) [user] mfix_vars1(0, _375834)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _375834)
   Call: (275) [system] 0=_375834
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _375836, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1471, 0], [1471, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    }", 1471, 0], [";;    }", 1471, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1471, 0], [";;    }", 1471, 0])
   Call: (270) [system] compound_name_arguments(_270008, '$COMMENT', [";;    }", 1471, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1471, 0), '$COMMENT', [";;    }", 1471, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1471, 0)\=@='$COMMENT'(";;    }", 1471, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1471, 0), _264422)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    }", 1471, 0), _426008))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1471, 0), _426008))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1471, 0), _426008))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1471, 0), _426008))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1471, 0), _426008)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1471, 0), _426008)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    }", 1471, 0), _431594))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1471, 0), _431594))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    }", 1471, 0), _431594)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1471, 0), _431594)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    }", 1471, 0), _431594)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1471, 0)\=@='$COMMENT'(";;    }", 1471, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1471, 0), _426008)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    }", 1471, 0), _258810))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1471, 0), _258810))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1471, 0), _258810))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1471, 0), _258810))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1471, 0), _258810)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1471, 0), _258810)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    }", 1471, 0), _453914))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1471, 0), _453914))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    }", 1471, 0), _453914)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1471, 0), _453914)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    }", 1471, 0), _453914)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1471, 0)\=@='$COMMENT'(";;    }", 1471, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1471, 0), _258810)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0)))
   Call: (261) [system] '$COMMENT'(";;    }", 1471, 0)\=@='$COMMENT'(";;    }", 1471, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1471, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1471, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1471, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1471, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1471, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    }", 1471, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    }", 1471, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    }", 1471, 0), _482692, [], _482694)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    }", 1471, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1471, 0), _482692, [], _482694)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1471, 0), _482692, [], _482694)
   Call: (258) [system] atom('$COMMENT'(";;    }", 1471, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1471, 0), _482692, [], _482694)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1471, 0), _482692, [], _482694)
   Call: (258) [system] compound('$COMMENT'(";;    }", 1471, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    }", 1471, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1471, 0), _492008, _492010)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1471, 0), '$COMMENT', [";;    }", 1471, 0])
^  Call: (258) [user] subst_vars([";;    }", 1471, 0], _493894, [], _482694)
^  Unify: (258) [user] subst_vars([";;    }", 1471, 0], [";;    }", 1471, 0], [], [])
   Call: (259) [system] var([";;    }", 1471, 0])
^  Redo: (258) [user] subst_vars([";;    }", 1471, 0], _493894, [], _482694)
^  Unify: (258) [user] subst_vars([";;    }", 1471, 0], [_497630|_497632], [], _482694)
^  Call: (259) [user] subst_vars(";;    }", _497630, [], _498570)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
   Call: (260) [system] var(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _497630, [], _498570)
^  Unify: (259) [user] subst_vars(";;    }", _497630, [], _498570)
   Call: (260) [system] atom(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _497630, [], _498570)
^  Unify: (259) [user] subst_vars(";;    }", _497630, [], _498570)
   Call: (260) [system] compound(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _497630, [], _498570)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Exit: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Call: (259) [user] subst_vars([1471, 0], _497632, [], _482694)
^  Unify: (259) [user] subst_vars([1471, 0], [1471, 0], [], [])
   Call: (260) [system] var([1471, 0])
^  Redo: (259) [user] subst_vars([1471, 0], _497632, [], _482694)
^  Unify: (259) [user] subst_vars([1471, 0], [_513502|_513504], [], _482694)
^  Call: (260) [user] subst_vars(1471, _513502, [], _514442)
^  Unify: (260) [user] subst_vars(1471, 1471, [], [])
   Call: (261) [system] var(1471)
^  Redo: (260) [user] subst_vars(1471, _513502, [], _514442)
^  Unify: (260) [user] subst_vars(1471, _513502, [], _514442)
   Call: (261) [system] atom(1471)
^  Redo: (260) [user] subst_vars(1471, _513502, [], _514442)
^  Unify: (260) [user] subst_vars(1471, _513502, [], _514442)
   Call: (261) [system] compound(1471)
^  Redo: (260) [user] subst_vars(1471, _513502, [], _514442)
^  Unify: (260) [user] subst_vars(1471, 1471, [], [])
^  Exit: (260) [user] subst_vars(1471, 1471, [], [])
^  Call: (260) [user] subst_vars([0], _5978, [], _5940)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _5978, [], _5940)
^  Unify: (260) [user] subst_vars([0], [_11404|_11406], [], _5940)
^  Call: (261) [user] subst_vars(0, _11404, [], _12344)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _11404, [], _12344)
^  Unify: (261) [user] subst_vars(0, _11404, [], _12344)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _11404, [], _12344)
^  Unify: (261) [user] subst_vars(0, _11404, [], _12344)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _11404, [], _12344)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _11406, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _11406, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1471, 0], [1471, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    }", 1471, 0], [";;    }", 1471, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5938, '$COMMENT', [";;    }", 1471, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1471, 0), '$COMMENT', [";;    }", 1471, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    }", 1471, 0), '$COMMENT'(";;    }", 1471, 0), [], [])
   Call: (257) [system] _34762=metta_file_buffer(+, '$COMMENT'(";;    }", 1471, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    }", 1471, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    }", 1471, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1471, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1471, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1471, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1471, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1471, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1471, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1472, 0, 52723, '$COMMENT'(";; Converted:", 1472, 0), '$stream_position'(52723, 1472, 0, 52757)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1472, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1472, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1472, 0), _87480))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1472, 0), _87480))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1472, 0), _87480)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1472, 0), _87480)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1472, 0), _87480)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1472, 0), _87480)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1472, 0), _93092))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1472, 0), _93092))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1472, 0), _93092))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1472, 0), _93092))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1472, 0), _93092)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1472, 0), _93092)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1472, 0), _98678))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1472, 0), _98678))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1472, 0), _98678)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1472, 0), _98678)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1472, 0), _98678)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1472, 0), _98678)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1472, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1472, 0), _98678)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1472, 0), '$VAR'(_106138))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1472, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1472, 0), _98678)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1472, 0), _98678)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1472, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1472, 0), _98678)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1472, 0), _98678)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1472, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1472, 0), _98678)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1472, 0), _98678)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1472, 0)==[_115418, _115424]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1472, 0), _98678)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1472, 0), _98678)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1472, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1472, 0), _98678)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1472, 0), _98678)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1472, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1472, 0), _98678)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1472, 0), _98678)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1472, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1472, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1472, 0), _125620, _125622)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1472, 0), '$COMMENT', [";; Converted:", 1472, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1472, 0], _129362)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1472, 0], _129362)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1472, 0], _129362, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1472, 0], [_132180|_132182], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _132180)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _132180)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _132180)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_136826))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _132180)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _132180)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _132180)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _132180)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _132180)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _132180)
   Call: (273) [system] ";; Converted:"==[_146106, _146112]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _132180)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _132180)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _132180)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _132180)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _132180)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _132180)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _132180)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _132180)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _132180)
   Call: (273) [system] ";; Converted:"=_132180
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1472, 0], _132182, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1472, 0], [_170178|_170180], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1472, _170178)
^  Unify: (273) [user] mfix_vars1(1472, _170178)
   Call: (274) [system] var(1472)
^  Redo: (273) [user] mfix_vars1(1472, _170178)
^  Unify: (273) [user] mfix_vars1(1472, '$VAR'(_174824))
   Call: (274) [system] atom(1472)
^  Redo: (273) [user] mfix_vars1(1472, _170178)
^  Unify: (273) [user] mfix_vars1(1472, _170178)
   Call: (274) [system] 1472==true
^  Redo: (273) [user] mfix_vars1(1472, _170178)
^  Unify: (273) [user] mfix_vars1(1472, _170178)
   Call: (274) [system] 1472==false
^  Redo: (273) [user] mfix_vars1(1472, _170178)
^  Unify: (273) [user] mfix_vars1(1472, _170178)
   Call: (274) [system] 1472==[_184104, _184110]
^  Redo: (273) [user] mfix_vars1(1472, _170178)
^  Unify: (273) [user] mfix_vars1(1472, _170178)
   Call: (274) [system] is_list(1472)
^  Redo: (273) [user] mfix_vars1(1472, _170178)
^  Unify: (273) [user] mfix_vars1(1472, _170178)
   Call: (274) [system] string(1472)
^  Redo: (273) [user] mfix_vars1(1472, _170178)
^  Unify: (273) [user] mfix_vars1(1472, _170178)
   Call: (274) [system] compound(1472)
^  Redo: (273) [user] mfix_vars1(1472, _170178)
^  Unify: (273) [user] mfix_vars1(1472, _170178)
^  Call: (274) [user] symbol(1472)
^  Unify: (274) [user] symbol(1472)
   Call: (275) [system] atom(1472)
   Fail: (275) [system] atom(1472)
^  Fail: (274) [user] symbol(1472)
^  Redo: (273) [user] mfix_vars1(1472, _170178)
   Call: (274) [system] 1472=_170178
   Exit: (274) [system] 1472=1472
^  Exit: (273) [user] mfix_vars1(1472, 1472)
   Call: (273) [apply] apply:maplist_([0], _170180, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_204504|_204506], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _204504)
^  Unify: (274) [user] mfix_vars1(0, _204504)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _204504)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_209150))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _204504)
^  Unify: (274) [user] mfix_vars1(0, _204504)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _204504)
^  Unify: (274) [user] mfix_vars1(0, _204504)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _204504)
^  Unify: (274) [user] mfix_vars1(0, _204504)
   Call: (275) [system] 0==[_218430, _218436]
^  Redo: (274) [user] mfix_vars1(0, _204504)
^  Unify: (274) [user] mfix_vars1(0, _204504)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _204504)
^  Unify: (274) [user] mfix_vars1(0, _204504)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _204504)
^  Unify: (274) [user] mfix_vars1(0, _204504)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _204504)
^  Unify: (274) [user] mfix_vars1(0, _204504)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _204504)
   Call: (275) [system] 0=_204504
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _204506, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1472, 0], [1472, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1472, 0], [";; Converted:", 1472, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1472, 0], [";; Converted:", 1472, 0])
   Call: (270) [system] compound_name_arguments(_98678, '$COMMENT', [";; Converted:", 1472, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1472, 0), '$COMMENT', [";; Converted:", 1472, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1472, 0)\=@='$COMMENT'(";; Converted:", 1472, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1472, 0), _93092)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1472, 0), _254678))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1472, 0), _254678))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1472, 0), _254678))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1472, 0), _254678))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1472, 0), _254678)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1472, 0), _254678)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1472, 0), _260264))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1472, 0), _260264))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1472, 0), _260264)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1472, 0), _260264)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1472, 0), _260264)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1472, 0)\=@='$COMMENT'(";; Converted:", 1472, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1472, 0), _254678)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1472, 0), _87480))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1472, 0), _87480))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1472, 0), _87480))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1472, 0), _87480))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1472, 0), _87480)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1472, 0), _87480)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1472, 0), _282584))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1472, 0), _282584))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1472, 0), _282584)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1472, 0), _282584)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1472, 0), _282584)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1472, 0)\=@='$COMMENT'(";; Converted:", 1472, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1472, 0), _87480)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1472, 0)\=@='$COMMENT'(";; Converted:", 1472, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1472, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1472, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1472, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1472, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1472, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1472, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1472, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1472, 0), _311362, [], _311364)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1472, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1472, 0), _311362, [], _311364)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1472, 0), _311362, [], _311364)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1472, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1472, 0), _311362, [], _311364)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1472, 0), _311362, [], _311364)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1472, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1472, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1472, 0), _320678, _320680)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1472, 0), '$COMMENT', [";; Converted:", 1472, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1472, 0], _322564, [], _311364)
^  Unify: (258) [user] subst_vars([";; Converted:", 1472, 0], [";; Converted:", 1472, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1472, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1472, 0], _322564, [], _311364)
^  Unify: (258) [user] subst_vars([";; Converted:", 1472, 0], [_326300|_326302], [], _311364)
^  Call: (259) [user] subst_vars(";; Converted:", _326300, [], _327240)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _326300, [], _327240)
^  Unify: (259) [user] subst_vars(";; Converted:", _326300, [], _327240)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _326300, [], _327240)
^  Unify: (259) [user] subst_vars(";; Converted:", _326300, [], _327240)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _326300, [], _327240)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1472, 0], _326302, [], _311364)
^  Unify: (259) [user] subst_vars([1472, 0], [1472, 0], [], [])
   Call: (260) [system] var([1472, 0])
^  Redo: (259) [user] subst_vars([1472, 0], _326302, [], _311364)
^  Unify: (259) [user] subst_vars([1472, 0], [_342172|_342174], [], _311364)
^  Call: (260) [user] subst_vars(1472, _342172, [], _343112)
^  Unify: (260) [user] subst_vars(1472, 1472, [], [])
   Call: (261) [system] var(1472)
^  Redo: (260) [user] subst_vars(1472, _342172, [], _343112)
^  Unify: (260) [user] subst_vars(1472, _342172, [], _343112)
   Call: (261) [system] atom(1472)
^  Redo: (260) [user] subst_vars(1472, _342172, [], _343112)
^  Unify: (260) [user] subst_vars(1472, _342172, [], _343112)
   Call: (261) [system] compound(1472)
^  Redo: (260) [user] subst_vars(1472, _342172, [], _343112)
^  Unify: (260) [user] subst_vars(1472, 1472, [], [])
^  Exit: (260) [user] subst_vars(1472, 1472, [], [])
^  Call: (260) [user] subst_vars([0], _342174, [], _311364)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _342174, [], _311364)
^  Unify: (260) [user] subst_vars([0], [_358044|_358046], [], _311364)
^  Call: (261) [user] subst_vars(0, _358044, [], _358984)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _358044, [], _358984)
^  Unify: (261) [user] subst_vars(0, _358044, [], _358984)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _358044, [], _358984)
^  Unify: (261) [user] subst_vars(0, _358044, [], _358984)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _358044, [], _358984)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _358046, [], _311364)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _358046, [], _311364)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1472, 0], [1472, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1472, 0], [";; Converted:", 1472, 0], [], [])
   Call: (258) [system] compound_name_arguments(_311362, '$COMMENT', [";; Converted:", 1472, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1472, 0), '$COMMENT', [";; Converted:", 1472, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1472, 0), '$COMMENT'(";; Converted:", 1472, 0), [], [])
   Call: (257) [system] _381402=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1472, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1472, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1472, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1472, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1472, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1472, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1472, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1472, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1472, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1476, 0, 52801, '$COMMENT'(";; Original:", 1476, 0), '$stream_position'(52801, 1476, 0, 52835)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1476, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1476, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1476, 0), _434120))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1476, 0), _434120))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1476, 0), _434120)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1476, 0), _434120)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1476, 0), _434120)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1476, 0), _434120)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1476, 0), _439732))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1476, 0), _439732))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1476, 0), _439732))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1476, 0), _439732))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1476, 0), _439732)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1476, 0), _439732)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1476, 0), _445318))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1476, 0), _445318))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1476, 0), _445318)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1476, 0), _445318)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1476, 0), _445318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1476, 0), _445318)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1476, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1476, 0), _445318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1476, 0), '$VAR'(_452778))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1476, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1476, 0), _445318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1476, 0), _445318)
   Call: (270) [system] '$COMMENT'(";; Original:", 1476, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1476, 0), _445318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1476, 0), _445318)
   Call: (270) [system] '$COMMENT'(";; Original:", 1476, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1476, 0), _445318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1476, 0), _445318)
   Call: (270) [system] '$COMMENT'(";; Original:", 1476, 0)==[_462058, _462064]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1476, 0), _445318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1476, 0), _445318)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1476, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1476, 0), _445318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1476, 0), _445318)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1476, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1476, 0), _445318)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1476, 0), _445318)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1476, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1476, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1476, 0), _472260, _472262)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1476, 0), '$COMMENT', [";; Original:", 1476, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1476, 0], _476002)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1476, 0], _476002)
   Call: (271) [apply] apply:maplist_([";; Original:", 1476, 0], _476002, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1476, 0], [_478820|_478822], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _478820)
^  Unify: (272) [user] mfix_vars1(";; Original:", _478820)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _478820)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_483466))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _478820)
^  Unify: (272) [user] mfix_vars1(";; Original:", _478820)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _478820)
^  Unify: (272) [user] mfix_vars1(";; Original:", _478820)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _478820)
^  Unify: (272) [user] mfix_vars1(";; Original:", _478820)
   Call: (273) [system] ";; Original:"==[_492746, _492752]
^  Redo: (272) [user] mfix_vars1(";; Original:", _478820)
^  Unify: (272) [user] mfix_vars1(";; Original:", _478820)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _478820)
^  Unify: (272) [user] mfix_vars1(";; Original:", _478820)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _478820)
^  Unify: (272) [user] mfix_vars1(";; Original:", _478820)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _478820)
^  Unify: (272) [user] mfix_vars1(";; Original:", _478820)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _478820)
   Call: (273) [system] ";; Original:"=_478820
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1476, 0], _478822, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1476, 0], [_516818|_516820], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1476, _516818)
^  Unify: (273) [user] mfix_vars1(1476, _516818)
   Call: (274) [system] var(1476)
^  Redo: (273) [user] mfix_vars1(1476, _516818)
^  Unify: (273) [user] mfix_vars1(1476, '$VAR'(_521464))
   Call: (274) [system] atom(1476)
^  Redo: (273) [user] mfix_vars1(1476, _6030)
^  Unify: (273) [user] mfix_vars1(1476, _6030)
   Call: (274) [system] 1476==true
^  Redo: (273) [user] mfix_vars1(1476, _6030)
^  Unify: (273) [user] mfix_vars1(1476, _6030)
   Call: (274) [system] 1476==false
^  Redo: (273) [user] mfix_vars1(1476, _6030)
^  Unify: (273) [user] mfix_vars1(1476, _6030)
   Call: (274) [system] 1476==[_12884, _12890]
^  Redo: (273) [user] mfix_vars1(1476, _6030)
^  Unify: (273) [user] mfix_vars1(1476, _6030)
   Call: (274) [system] is_list(1476)
^  Redo: (273) [user] mfix_vars1(1476, _6030)
^  Unify: (273) [user] mfix_vars1(1476, _6030)
   Call: (274) [system] string(1476)
^  Redo: (273) [user] mfix_vars1(1476, _6030)
^  Unify: (273) [user] mfix_vars1(1476, _6030)
   Call: (274) [system] compound(1476)
^  Redo: (273) [user] mfix_vars1(1476, _6030)
^  Unify: (273) [user] mfix_vars1(1476, _6030)
^  Call: (274) [user] symbol(1476)
^  Unify: (274) [user] symbol(1476)
   Call: (275) [system] atom(1476)
   Fail: (275) [system] atom(1476)
^  Fail: (274) [user] symbol(1476)
^  Redo: (273) [user] mfix_vars1(1476, _6030)
   Call: (274) [system] 1476=_6030
   Exit: (274) [system] 1476=1476
^  Exit: (273) [user] mfix_vars1(1476, 1476)
   Call: (273) [apply] apply:maplist_([0], _6032, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_33284|_33286], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _33284)
^  Unify: (274) [user] mfix_vars1(0, _33284)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _33284)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_37930))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _33284)
^  Unify: (274) [user] mfix_vars1(0, _33284)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _33284)
^  Unify: (274) [user] mfix_vars1(0, _33284)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _33284)
^  Unify: (274) [user] mfix_vars1(0, _33284)
   Call: (275) [system] 0==[_47210, _47216]
^  Redo: (274) [user] mfix_vars1(0, _33284)
^  Unify: (274) [user] mfix_vars1(0, _33284)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _33284)
^  Unify: (274) [user] mfix_vars1(0, _33284)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _33284)
^  Unify: (274) [user] mfix_vars1(0, _33284)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _33284)
^  Unify: (274) [user] mfix_vars1(0, _33284)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _33284)
   Call: (275) [system] 0=_33284
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _33286, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1476, 0], [1476, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1476, 0], [";; Original:", 1476, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1476, 0], [";; Original:", 1476, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";; Original:", 1476, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1476, 0), '$COMMENT', [";; Original:", 1476, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1476, 0)\=@='$COMMENT'(";; Original:", 1476, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1476, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1476, 0), _83458))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1476, 0), _83458))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1476, 0), _83458))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1476, 0), _83458))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1476, 0), _83458)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1476, 0), _83458)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1476, 0), _89044))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1476, 0), _89044))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1476, 0), _89044)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1476, 0), _89044)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1476, 0), _89044)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1476, 0)\=@='$COMMENT'(";; Original:", 1476, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1476, 0), _83458)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1476, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1476, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1476, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1476, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1476, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1476, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1476, 0), _111364))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1476, 0), _111364))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1476, 0), _111364)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1476, 0), _111364)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1476, 0), _111364)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1476, 0)\=@='$COMMENT'(";; Original:", 1476, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1476, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1476, 0)\=@='$COMMENT'(";; Original:", 1476, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1476, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1476, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1476, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1476, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1476, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1476, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1476, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1476, 0), _140142, [], _140144)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1476, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1476, 0), _140142, [], _140144)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1476, 0), _140142, [], _140144)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1476, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1476, 0), _140142, [], _140144)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1476, 0), _140142, [], _140144)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1476, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1476, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1476, 0), _149458, _149460)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1476, 0), '$COMMENT', [";; Original:", 1476, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1476, 0], _151344, [], _140144)
^  Unify: (258) [user] subst_vars([";; Original:", 1476, 0], [";; Original:", 1476, 0], [], [])
   Call: (259) [system] var([";; Original:", 1476, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1476, 0], _151344, [], _140144)
^  Unify: (258) [user] subst_vars([";; Original:", 1476, 0], [_155080|_155082], [], _140144)
^  Call: (259) [user] subst_vars(";; Original:", _155080, [], _156020)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _155080, [], _156020)
^  Unify: (259) [user] subst_vars(";; Original:", _155080, [], _156020)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _155080, [], _156020)
^  Unify: (259) [user] subst_vars(";; Original:", _155080, [], _156020)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _155080, [], _156020)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1476, 0], _155082, [], _140144)
^  Unify: (259) [user] subst_vars([1476, 0], [1476, 0], [], [])
   Call: (260) [system] var([1476, 0])
^  Redo: (259) [user] subst_vars([1476, 0], _155082, [], _140144)
^  Unify: (259) [user] subst_vars([1476, 0], [_170952|_170954], [], _140144)
^  Call: (260) [user] subst_vars(1476, _170952, [], _171892)
^  Unify: (260) [user] subst_vars(1476, 1476, [], [])
   Call: (261) [system] var(1476)
^  Redo: (260) [user] subst_vars(1476, _170952, [], _171892)
^  Unify: (260) [user] subst_vars(1476, _170952, [], _171892)
   Call: (261) [system] atom(1476)
^  Redo: (260) [user] subst_vars(1476, _170952, [], _171892)
^  Unify: (260) [user] subst_vars(1476, _170952, [], _171892)
   Call: (261) [system] compound(1476)
^  Redo: (260) [user] subst_vars(1476, _170952, [], _171892)
^  Unify: (260) [user] subst_vars(1476, 1476, [], [])
^  Exit: (260) [user] subst_vars(1476, 1476, [], [])
^  Call: (260) [user] subst_vars([0], _170954, [], _140144)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _170954, [], _140144)
^  Unify: (260) [user] subst_vars([0], [_186824|_186826], [], _140144)
^  Call: (261) [user] subst_vars(0, _186824, [], _187764)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _186824, [], _187764)
^  Unify: (261) [user] subst_vars(0, _186824, [], _187764)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _186824, [], _187764)
^  Unify: (261) [user] subst_vars(0, _186824, [], _187764)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _186824, [], _187764)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _186826, [], _140144)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _186826, [], _140144)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1476, 0], [1476, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1476, 0], [";; Original:", 1476, 0], [], [])
   Call: (258) [system] compound_name_arguments(_140142, '$COMMENT', [";; Original:", 1476, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1476, 0), '$COMMENT', [";; Original:", 1476, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1476, 0), '$COMMENT'(";; Original:", 1476, 0), [], [])
   Call: (257) [system] _210182=metta_file_buffer(+, '$COMMENT'(";; Original:", 1476, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1476, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1476, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1476, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1476, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1476, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1476, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1476, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1476, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1477, 0, 52814, '$COMMENT'(";;    #[test]", 1477, 0), '$stream_position'(52814, 1477, 0, 52848)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1477, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1477, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1477, 0), _262900))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1477, 0), _262900))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1477, 0), _262900)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1477, 0), _262900)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1477, 0), _262900)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1477, 0), _262900)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1477, 0), _268512))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1477, 0), _268512))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1477, 0), _268512))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1477, 0), _268512))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1477, 0), _268512)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1477, 0), _268512)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    #[test]", 1477, 0), _274098))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1477, 0), _274098))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    #[test]", 1477, 0), _274098)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1477, 0), _274098)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1477, 0), _274098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1477, 0), _274098)
   Call: (270) [system] var('$COMMENT'(";;    #[test]", 1477, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1477, 0), _274098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1477, 0), '$VAR'(_281558))
   Call: (270) [system] atom('$COMMENT'(";;    #[test]", 1477, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1477, 0), _274098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1477, 0), _274098)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1477, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1477, 0), _274098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1477, 0), _274098)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1477, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1477, 0), _274098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1477, 0), _274098)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1477, 0)==[_290838, _290844]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1477, 0), _274098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1477, 0), _274098)
   Call: (270) [system] is_list('$COMMENT'(";;    #[test]", 1477, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1477, 0), _274098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1477, 0), _274098)
   Call: (270) [system] string('$COMMENT'(";;    #[test]", 1477, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1477, 0), _274098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1477, 0), _274098)
   Call: (270) [system] compound('$COMMENT'(";;    #[test]", 1477, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    #[test]", 1477, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1477, 0), _301040, _301042)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT', [";;    #[test]", 1477, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    #[test]", 1477, 0], _304782)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1477, 0], _304782)
   Call: (271) [apply] apply:maplist_([";;    #[test]", 1477, 0], _304782, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    #[test]", 1477, 0], [_307600|_307602], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    #[test]", _307600)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _307600)
   Call: (273) [system] var(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _307600)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", '$VAR'(_312246))
   Call: (273) [system] atom(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _307600)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _307600)
   Call: (273) [system] ";;    #[test]"==true
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _307600)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _307600)
   Call: (273) [system] ";;    #[test]"==false
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _307600)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _307600)
   Call: (273) [system] ";;    #[test]"==[_321526, _321532]
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _307600)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _307600)
   Call: (273) [system] is_list(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _307600)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _307600)
   Call: (273) [system] string(";;    #[test]")
   Exit: (273) [system] string(";;    #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _307600)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _307600)
   Call: (273) [system] compound(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _307600)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _307600)
^  Call: (273) [user] symbol(";;    #[test]")
^  Unify: (273) [user] symbol(";;    #[test]")
   Call: (274) [system] atom(";;    #[test]")
   Fail: (274) [system] atom(";;    #[test]")
^  Fail: (273) [user] symbol(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _307600)
   Call: (273) [system] ";;    #[test]"=_307600
   Exit: (273) [system] ";;    #[test]"=";;    #[test]"
^  Exit: (272) [user] mfix_vars1(";;    #[test]", ";;    #[test]")
   Call: (272) [apply] apply:maplist_([1477, 0], _307602, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1477, 0], [_345598|_345600], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1477, _345598)
^  Unify: (273) [user] mfix_vars1(1477, _345598)
   Call: (274) [system] var(1477)
^  Redo: (273) [user] mfix_vars1(1477, _345598)
^  Unify: (273) [user] mfix_vars1(1477, '$VAR'(_350244))
   Call: (274) [system] atom(1477)
^  Redo: (273) [user] mfix_vars1(1477, _345598)
^  Unify: (273) [user] mfix_vars1(1477, _345598)
   Call: (274) [system] 1477==true
^  Redo: (273) [user] mfix_vars1(1477, _345598)
^  Unify: (273) [user] mfix_vars1(1477, _345598)
   Call: (274) [system] 1477==false
^  Redo: (273) [user] mfix_vars1(1477, _345598)
^  Unify: (273) [user] mfix_vars1(1477, _345598)
   Call: (274) [system] 1477==[_359524, _359530]
^  Redo: (273) [user] mfix_vars1(1477, _345598)
^  Unify: (273) [user] mfix_vars1(1477, _345598)
   Call: (274) [system] is_list(1477)
^  Redo: (273) [user] mfix_vars1(1477, _345598)
^  Unify: (273) [user] mfix_vars1(1477, _345598)
   Call: (274) [system] string(1477)
^  Redo: (273) [user] mfix_vars1(1477, _345598)
^  Unify: (273) [user] mfix_vars1(1477, _345598)
   Call: (274) [system] compound(1477)
^  Redo: (273) [user] mfix_vars1(1477, _345598)
^  Unify: (273) [user] mfix_vars1(1477, _345598)
^  Call: (274) [user] symbol(1477)
^  Unify: (274) [user] symbol(1477)
   Call: (275) [system] atom(1477)
   Fail: (275) [system] atom(1477)
^  Fail: (274) [user] symbol(1477)
^  Redo: (273) [user] mfix_vars1(1477, _345598)
   Call: (274) [system] 1477=_345598
   Exit: (274) [system] 1477=1477
^  Exit: (273) [user] mfix_vars1(1477, 1477)
   Call: (273) [apply] apply:maplist_([0], _345600, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_379924|_379926], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _379924)
^  Unify: (274) [user] mfix_vars1(0, _379924)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _379924)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_384570))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _379924)
^  Unify: (274) [user] mfix_vars1(0, _379924)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _379924)
^  Unify: (274) [user] mfix_vars1(0, _379924)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _379924)
^  Unify: (274) [user] mfix_vars1(0, _379924)
   Call: (275) [system] 0==[_393850, _393856]
^  Redo: (274) [user] mfix_vars1(0, _379924)
^  Unify: (274) [user] mfix_vars1(0, _379924)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _379924)
^  Unify: (274) [user] mfix_vars1(0, _379924)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _379924)
^  Unify: (274) [user] mfix_vars1(0, _379924)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _379924)
^  Unify: (274) [user] mfix_vars1(0, _379924)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _379924)
   Call: (275) [system] 0=_379924
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _379926, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1477, 0], [1477, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    #[test]", 1477, 0], [";;    #[test]", 1477, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1477, 0], [";;    #[test]", 1477, 0])
   Call: (270) [system] compound_name_arguments(_274098, '$COMMENT', [";;    #[test]", 1477, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT', [";;    #[test]", 1477, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1477, 0)\=@='$COMMENT'(";;    #[test]", 1477, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1477, 0), _268512)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    #[test]", 1477, 0), _430098))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1477, 0), _430098))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1477, 0), _430098))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1477, 0), _430098))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1477, 0), _430098)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1477, 0), _430098)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    #[test]", 1477, 0), _435684))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1477, 0), _435684))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    #[test]", 1477, 0), _435684)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1477, 0), _435684)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1477, 0), _435684)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1477, 0)\=@='$COMMENT'(";;    #[test]", 1477, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1477, 0), _430098)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    #[test]", 1477, 0), _262900))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1477, 0), _262900))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1477, 0), _262900))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1477, 0), _262900))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1477, 0), _262900)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1477, 0), _262900)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    #[test]", 1477, 0), _458004))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1477, 0), _458004))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    #[test]", 1477, 0), _458004)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1477, 0), _458004)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1477, 0), _458004)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1477, 0)\=@='$COMMENT'(";;    #[test]", 1477, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1477, 0), _262900)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0)))
   Call: (261) [system] '$COMMENT'(";;    #[test]", 1477, 0)\=@='$COMMENT'(";;    #[test]", 1477, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1477, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1477, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1477, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1477, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1477, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1477, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1477, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1477, 0), _486782, [], _486784)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    #[test]", 1477, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1477, 0), _486782, [], _486784)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1477, 0), _486782, [], _486784)
   Call: (258) [system] atom('$COMMENT'(";;    #[test]", 1477, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1477, 0), _486782, [], _486784)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1477, 0), _486782, [], _486784)
   Call: (258) [system] compound('$COMMENT'(";;    #[test]", 1477, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    #[test]", 1477, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1477, 0), _496098, _496100)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT', [";;    #[test]", 1477, 0])
^  Call: (258) [user] subst_vars([";;    #[test]", 1477, 0], _497984, [], _486784)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1477, 0], [";;    #[test]", 1477, 0], [], [])
   Call: (259) [system] var([";;    #[test]", 1477, 0])
^  Redo: (258) [user] subst_vars([";;    #[test]", 1477, 0], _497984, [], _486784)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1477, 0], [_501720|_501722], [], _486784)
^  Call: (259) [user] subst_vars(";;    #[test]", _501720, [], _502660)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
   Call: (260) [system] var(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _501720, [], _502660)
^  Unify: (259) [user] subst_vars(";;    #[test]", _501720, [], _502660)
   Call: (260) [system] atom(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _501720, [], _502660)
^  Unify: (259) [user] subst_vars(";;    #[test]", _501720, [], _502660)
   Call: (260) [system] compound(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _501720, [], _502660)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Exit: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Call: (259) [user] subst_vars([1477, 0], _501722, [], _486784)
^  Unify: (259) [user] subst_vars([1477, 0], [1477, 0], [], [])
   Call: (260) [system] var([1477, 0])
^  Redo: (259) [user] subst_vars([1477, 0], _501722, [], _486784)
^  Unify: (259) [user] subst_vars([1477, 0], [_517592|_517594], [], _486784)
^  Call: (260) [user] subst_vars(1477, _517592, [], _518532)
^  Unify: (260) [user] subst_vars(1477, 1477, [], [])
   Call: (261) [system] var(1477)
^  Redo: (260) [user] subst_vars(1477, _517592, [], _518532)
^  Unify: (260) [user] subst_vars(1477, _517592, [], _518532)
   Call: (261) [system] atom(1477)
^  Redo: (260) [user] subst_vars(1477, _5976, [], _5980)
^  Unify: (260) [user] subst_vars(1477, _5976, [], _5980)
   Call: (261) [system] compound(1477)
^  Redo: (260) [user] subst_vars(1477, _5976, [], _5980)
^  Unify: (260) [user] subst_vars(1477, 1477, [], [])
^  Exit: (260) [user] subst_vars(1477, 1477, [], [])
^  Call: (260) [user] subst_vars([0], _5978, [], _5940)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _5978, [], _5940)
^  Unify: (260) [user] subst_vars([0], [_15282|_15284], [], _5940)
^  Call: (261) [user] subst_vars(0, _15282, [], _16222)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _15282, [], _16222)
^  Unify: (261) [user] subst_vars(0, _15282, [], _16222)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _15282, [], _16222)
^  Unify: (261) [user] subst_vars(0, _15282, [], _16222)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _15282, [], _16222)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _15284, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _15284, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1477, 0], [1477, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    #[test]", 1477, 0], [";;    #[test]", 1477, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5938, '$COMMENT', [";;    #[test]", 1477, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT', [";;    #[test]", 1477, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1477, 0), '$COMMENT'(";;    #[test]", 1477, 0), [], [])
   Call: (257) [system] _38640=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1477, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1477, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1477, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1477, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1477, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1477, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1477, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1477, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1477, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1478, 0, 52828, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$stream_position'(52828, 1478, 0, 52862)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _91362))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _91362))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _91362)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _91362)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _91362)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _91362)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _96974))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _96974))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _96974))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _96974))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _96974)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _96974)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _102560))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _102560))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _102560)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _102560)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _102560)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _102560)
   Call: (270) [system] var('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _102560)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$VAR'(_110020))
   Call: (270) [system] atom('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _102560)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _102560)
   Call: (270) [system] '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _102560)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _102560)
   Call: (270) [system] '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _102560)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _102560)
   Call: (270) [system] '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0)==[_119300, _119306]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _102560)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _102560)
   Call: (270) [system] is_list('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _102560)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _102560)
   Call: (270) [system] string('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _102560)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _102560)
   Call: (270) [system] compound('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _129502, _129504)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT', [";;    fn sealed_op_runner() {", 1478, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    fn sealed_op_runner() {", 1478, 0], _133244)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn sealed_op_runner() {", 1478, 0], _133244)
   Call: (271) [apply] apply:maplist_([";;    fn sealed_op_runner() {", 1478, 0], _133244, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    fn sealed_op_runner() {", 1478, 0], [_136062|_136064], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    fn sealed_op_runner() {", _136062)
^  Unify: (272) [user] mfix_vars1(";;    fn sealed_op_runner() {", _136062)
   Call: (273) [system] var(";;    fn sealed_op_runner() {")
^  Redo: (272) [user] mfix_vars1(";;    fn sealed_op_runner() {", _136062)
^  Unify: (272) [user] mfix_vars1(";;    fn sealed_op_runner() {", '$VAR'(_140708))
   Call: (273) [system] atom(";;    fn sealed_op_runner() {")
^  Redo: (272) [user] mfix_vars1(";;    fn sealed_op_runner() {", _136062)
^  Unify: (272) [user] mfix_vars1(";;    fn sealed_op_runner() {", _136062)
   Call: (273) [system] ";;    fn sealed_op_runner() {"==true
^  Redo: (272) [user] mfix_vars1(";;    fn sealed_op_runner() {", _136062)
^  Unify: (272) [user] mfix_vars1(";;    fn sealed_op_runner() {", _136062)
   Call: (273) [system] ";;    fn sealed_op_runner() {"==false
^  Redo: (272) [user] mfix_vars1(";;    fn sealed_op_runner() {", _136062)
^  Unify: (272) [user] mfix_vars1(";;    fn sealed_op_runner() {", _136062)
   Call: (273) [system] ";;    fn sealed_op_runner() {"==[_149988, _149994]
^  Redo: (272) [user] mfix_vars1(";;    fn sealed_op_runner() {", _136062)
^  Unify: (272) [user] mfix_vars1(";;    fn sealed_op_runner() {", _136062)
   Call: (273) [system] is_list(";;    fn sealed_op_runner() {")
^  Redo: (272) [user] mfix_vars1(";;    fn sealed_op_runner() {", _136062)
^  Unify: (272) [user] mfix_vars1(";;    fn sealed_op_runner() {", _136062)
   Call: (273) [system] string(";;    fn sealed_op_runner() {")
   Exit: (273) [system] string(";;    fn sealed_op_runner() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    fn sealed_op_runner() {", _136062)
^  Unify: (272) [user] mfix_vars1(";;    fn sealed_op_runner() {", _136062)
   Call: (273) [system] compound(";;    fn sealed_op_runner() {")
^  Redo: (272) [user] mfix_vars1(";;    fn sealed_op_runner() {", _136062)
^  Unify: (272) [user] mfix_vars1(";;    fn sealed_op_runner() {", _136062)
^  Call: (273) [user] symbol(";;    fn sealed_op_runner() {")
^  Unify: (273) [user] symbol(";;    fn sealed_op_runner() {")
   Call: (274) [system] atom(";;    fn sealed_op_runner() {")
   Fail: (274) [system] atom(";;    fn sealed_op_runner() {")
^  Fail: (273) [user] symbol(";;    fn sealed_op_runner() {")
^  Redo: (272) [user] mfix_vars1(";;    fn sealed_op_runner() {", _136062)
   Call: (273) [system] ";;    fn sealed_op_runner() {"=_136062
   Exit: (273) [system] ";;    fn sealed_op_runner() {"=";;    fn sealed_op_runner() {"
^  Exit: (272) [user] mfix_vars1(";;    fn sealed_op_runner() {", ";;    fn sealed_op_runner() {")
   Call: (272) [apply] apply:maplist_([1478, 0], _136064, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1478, 0], [_174060|_174062], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1478, _174060)
^  Unify: (273) [user] mfix_vars1(1478, _174060)
   Call: (274) [system] var(1478)
^  Redo: (273) [user] mfix_vars1(1478, _174060)
^  Unify: (273) [user] mfix_vars1(1478, '$VAR'(_178706))
   Call: (274) [system] atom(1478)
^  Redo: (273) [user] mfix_vars1(1478, _174060)
^  Unify: (273) [user] mfix_vars1(1478, _174060)
   Call: (274) [system] 1478==true
^  Redo: (273) [user] mfix_vars1(1478, _174060)
^  Unify: (273) [user] mfix_vars1(1478, _174060)
   Call: (274) [system] 1478==false
^  Redo: (273) [user] mfix_vars1(1478, _174060)
^  Unify: (273) [user] mfix_vars1(1478, _174060)
   Call: (274) [system] 1478==[_187986, _187992]
^  Redo: (273) [user] mfix_vars1(1478, _174060)
^  Unify: (273) [user] mfix_vars1(1478, _174060)
   Call: (274) [system] is_list(1478)
^  Redo: (273) [user] mfix_vars1(1478, _174060)
^  Unify: (273) [user] mfix_vars1(1478, _174060)
   Call: (274) [system] string(1478)
^  Redo: (273) [user] mfix_vars1(1478, _174060)
^  Unify: (273) [user] mfix_vars1(1478, _174060)
   Call: (274) [system] compound(1478)
^  Redo: (273) [user] mfix_vars1(1478, _174060)
^  Unify: (273) [user] mfix_vars1(1478, _174060)
^  Call: (274) [user] symbol(1478)
^  Unify: (274) [user] symbol(1478)
   Call: (275) [system] atom(1478)
   Fail: (275) [system] atom(1478)
^  Fail: (274) [user] symbol(1478)
^  Redo: (273) [user] mfix_vars1(1478, _174060)
   Call: (274) [system] 1478=_174060
   Exit: (274) [system] 1478=1478
^  Exit: (273) [user] mfix_vars1(1478, 1478)
   Call: (273) [apply] apply:maplist_([0], _174062, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_208386|_208388], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _208386)
^  Unify: (274) [user] mfix_vars1(0, _208386)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _208386)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_213032))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _208386)
^  Unify: (274) [user] mfix_vars1(0, _208386)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _208386)
^  Unify: (274) [user] mfix_vars1(0, _208386)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _208386)
^  Unify: (274) [user] mfix_vars1(0, _208386)
   Call: (275) [system] 0==[_222312, _222318]
^  Redo: (274) [user] mfix_vars1(0, _208386)
^  Unify: (274) [user] mfix_vars1(0, _208386)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _208386)
^  Unify: (274) [user] mfix_vars1(0, _208386)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _208386)
^  Unify: (274) [user] mfix_vars1(0, _208386)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _208386)
^  Unify: (274) [user] mfix_vars1(0, _208386)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _208386)
   Call: (275) [system] 0=_208386
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _208388, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1478, 0], [1478, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    fn sealed_op_runner() {", 1478, 0], [";;    fn sealed_op_runner() {", 1478, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn sealed_op_runner() {", 1478, 0], [";;    fn sealed_op_runner() {", 1478, 0])
   Call: (270) [system] compound_name_arguments(_102560, '$COMMENT', [";;    fn sealed_op_runner() {", 1478, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT', [";;    fn sealed_op_runner() {", 1478, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0)\=@='$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _96974)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _258560))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _258560))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _258560))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _258560))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _258560)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _258560)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _264146))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _264146))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _264146)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _264146)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _264146)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0)\=@='$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _258560)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _91362))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _91362))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _91362))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _91362))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _91362)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _91362)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _286466))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _286466))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _286466)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _286466)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _286466)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0)\=@='$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _91362)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0)))
   Call: (261) [system] '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0)\=@='$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _315244, [], _315246)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _315244, [], _315246)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _315244, [], _315246)
   Call: (258) [system] atom('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _315244, [], _315246)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _315244, [], _315246)
   Call: (258) [system] compound('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), _324560, _324562)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT', [";;    fn sealed_op_runner() {", 1478, 0])
^  Call: (258) [user] subst_vars([";;    fn sealed_op_runner() {", 1478, 0], _326446, [], _315246)
^  Unify: (258) [user] subst_vars([";;    fn sealed_op_runner() {", 1478, 0], [";;    fn sealed_op_runner() {", 1478, 0], [], [])
   Call: (259) [system] var([";;    fn sealed_op_runner() {", 1478, 0])
^  Redo: (258) [user] subst_vars([";;    fn sealed_op_runner() {", 1478, 0], _326446, [], _315246)
^  Unify: (258) [user] subst_vars([";;    fn sealed_op_runner() {", 1478, 0], [_330182|_330184], [], _315246)
^  Call: (259) [user] subst_vars(";;    fn sealed_op_runner() {", _330182, [], _331122)
^  Unify: (259) [user] subst_vars(";;    fn sealed_op_runner() {", ";;    fn sealed_op_runner() {", [], [])
   Call: (260) [system] var(";;    fn sealed_op_runner() {")
^  Redo: (259) [user] subst_vars(";;    fn sealed_op_runner() {", _330182, [], _331122)
^  Unify: (259) [user] subst_vars(";;    fn sealed_op_runner() {", _330182, [], _331122)
   Call: (260) [system] atom(";;    fn sealed_op_runner() {")
^  Redo: (259) [user] subst_vars(";;    fn sealed_op_runner() {", _330182, [], _331122)
^  Unify: (259) [user] subst_vars(";;    fn sealed_op_runner() {", _330182, [], _331122)
   Call: (260) [system] compound(";;    fn sealed_op_runner() {")
^  Redo: (259) [user] subst_vars(";;    fn sealed_op_runner() {", _330182, [], _331122)
^  Unify: (259) [user] subst_vars(";;    fn sealed_op_runner() {", ";;    fn sealed_op_runner() {", [], [])
^  Exit: (259) [user] subst_vars(";;    fn sealed_op_runner() {", ";;    fn sealed_op_runner() {", [], [])
^  Call: (259) [user] subst_vars([1478, 0], _330184, [], _315246)
^  Unify: (259) [user] subst_vars([1478, 0], [1478, 0], [], [])
   Call: (260) [system] var([1478, 0])
^  Redo: (259) [user] subst_vars([1478, 0], _330184, [], _315246)
^  Unify: (259) [user] subst_vars([1478, 0], [_346054|_346056], [], _315246)
^  Call: (260) [user] subst_vars(1478, _346054, [], _346994)
^  Unify: (260) [user] subst_vars(1478, 1478, [], [])
   Call: (261) [system] var(1478)
^  Redo: (260) [user] subst_vars(1478, _346054, [], _346994)
^  Unify: (260) [user] subst_vars(1478, _346054, [], _346994)
   Call: (261) [system] atom(1478)
^  Redo: (260) [user] subst_vars(1478, _346054, [], _346994)
^  Unify: (260) [user] subst_vars(1478, _346054, [], _346994)
   Call: (261) [system] compound(1478)
^  Redo: (260) [user] subst_vars(1478, _346054, [], _346994)
^  Unify: (260) [user] subst_vars(1478, 1478, [], [])
^  Exit: (260) [user] subst_vars(1478, 1478, [], [])
^  Call: (260) [user] subst_vars([0], _346056, [], _315246)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _346056, [], _315246)
^  Unify: (260) [user] subst_vars([0], [_361926|_361928], [], _315246)
^  Call: (261) [user] subst_vars(0, _361926, [], _362866)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _361926, [], _362866)
^  Unify: (261) [user] subst_vars(0, _361926, [], _362866)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _361926, [], _362866)
^  Unify: (261) [user] subst_vars(0, _361926, [], _362866)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _361926, [], _362866)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _361928, [], _315246)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _361928, [], _315246)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1478, 0], [1478, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    fn sealed_op_runner() {", 1478, 0], [";;    fn sealed_op_runner() {", 1478, 0], [], [])
   Call: (258) [system] compound_name_arguments(_315244, '$COMMENT', [";;    fn sealed_op_runner() {", 1478, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT', [";;    fn sealed_op_runner() {", 1478, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), [], [])
   Call: (257) [system] _385284=metta_file_buffer(+, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn sealed_op_runner() {", 1478, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1479, 0, 52858, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$stream_position'(52858, 1479, 0, 52892)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _438024))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _438024))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _438024)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _438024)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _438024)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _438024)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _443636))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _443636))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _443636))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _443636))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _443636)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _443636)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _449222))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _449222))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _449222)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _449222)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _449222)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _449222)
   Call: (270) [system] var('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _449222)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$VAR'(_456682))
   Call: (270) [system] atom('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _449222)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _449222)
   Call: (270) [system] '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _449222)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _449222)
   Call: (270) [system] '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _449222)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _449222)
   Call: (270) [system] '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0)==[_465962, _465968]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _449222)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _449222)
   Call: (270) [system] is_list('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _449222)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _449222)
   Call: (270) [system] string('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _449222)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _449222)
   Call: (270) [system] compound('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _476164, _476166)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT', [";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0], _479906)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0], _479906)
   Call: (271) [apply] apply:maplist_([";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0], _479906, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0], [_482724|_482726], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _482724)
^  Unify: (272) [user] mfix_vars1(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _482724)
   Call: (273) [system] var(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");")
^  Redo: (272) [user] mfix_vars1(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _482724)
^  Unify: (272) [user] mfix_vars1(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", '$VAR'(_487370))
   Call: (273) [system] atom(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");")
^  Redo: (272) [user] mfix_vars1(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _482724)
^  Unify: (272) [user] mfix_vars1(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _482724)
   Call: (273) [system] ";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");"==true
^  Redo: (272) [user] mfix_vars1(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _482724)
^  Unify: (272) [user] mfix_vars1(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _482724)
   Call: (273) [system] ";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");"==false
^  Redo: (272) [user] mfix_vars1(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _482724)
^  Unify: (272) [user] mfix_vars1(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _482724)
   Call: (273) [system] ";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");"==[_496650, _496656]
^  Redo: (272) [user] mfix_vars1(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _482724)
^  Unify: (272) [user] mfix_vars1(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _482724)
   Call: (273) [system] is_list(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");")
^  Redo: (272) [user] mfix_vars1(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _482724)
^  Unify: (272) [user] mfix_vars1(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _482724)
   Call: (273) [system] string(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");")
   Exit: (273) [system] string(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _482724)
^  Unify: (272) [user] mfix_vars1(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _482724)
   Call: (273) [system] compound(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");")
^  Redo: (272) [user] mfix_vars1(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _482724)
^  Unify: (272) [user] mfix_vars1(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _482724)
^  Call: (273) [user] symbol(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");")
^  Unify: (273) [user] symbol(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");")
   Call: (274) [system] atom(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");")
   Fail: (274) [system] atom(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");")
^  Fail: (273) [user] symbol(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");")
^  Redo: (272) [user] mfix_vars1(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _482724)
   Call: (273) [system] ";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");"=_482724
   Exit: (273) [system] ";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");"=";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");"
^  Exit: (272) [user] mfix_vars1(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", ";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");")
   Call: (272) [apply] apply:maplist_([1479, 0], _482726, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1479, 0], [_520722|_520724], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1479, _520722)
^  Unify: (273) [user] mfix_vars1(1479, _520722)
   Call: (274) [system] var(1479)
^  Redo: (273) [user] mfix_vars1(1479, _6052)
^  Unify: (273) [user] mfix_vars1(1479, '$VAR'(_7560))
   Call: (274) [system] atom(1479)
^  Redo: (273) [user] mfix_vars1(1479, _6052)
^  Unify: (273) [user] mfix_vars1(1479, _6052)
   Call: (274) [system] 1479==true
^  Redo: (273) [user] mfix_vars1(1479, _6052)
^  Unify: (273) [user] mfix_vars1(1479, _6052)
   Call: (274) [system] 1479==false
^  Redo: (273) [user] mfix_vars1(1479, _6052)
^  Unify: (273) [user] mfix_vars1(1479, _6052)
   Call: (274) [system] 1479==[_16840, _16846]
^  Redo: (273) [user] mfix_vars1(1479, _6052)
^  Unify: (273) [user] mfix_vars1(1479, _6052)
   Call: (274) [system] is_list(1479)
^  Redo: (273) [user] mfix_vars1(1479, _6052)
^  Unify: (273) [user] mfix_vars1(1479, _6052)
   Call: (274) [system] string(1479)
^  Redo: (273) [user] mfix_vars1(1479, _6052)
^  Unify: (273) [user] mfix_vars1(1479, _6052)
   Call: (274) [system] compound(1479)
^  Redo: (273) [user] mfix_vars1(1479, _6052)
^  Unify: (273) [user] mfix_vars1(1479, _6052)
^  Call: (274) [user] symbol(1479)
^  Unify: (274) [user] symbol(1479)
   Call: (275) [system] atom(1479)
   Fail: (275) [system] atom(1479)
^  Fail: (274) [user] symbol(1479)
^  Redo: (273) [user] mfix_vars1(1479, _6052)
   Call: (274) [system] 1479=_6052
   Exit: (274) [system] 1479=1479
^  Exit: (273) [user] mfix_vars1(1479, 1479)
   Call: (273) [apply] apply:maplist_([0], _6054, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_37240|_37242], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _37240)
^  Unify: (274) [user] mfix_vars1(0, _37240)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _37240)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_41886))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _37240)
^  Unify: (274) [user] mfix_vars1(0, _37240)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _37240)
^  Unify: (274) [user] mfix_vars1(0, _37240)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _37240)
^  Unify: (274) [user] mfix_vars1(0, _37240)
   Call: (275) [system] 0==[_51166, _51172]
^  Redo: (274) [user] mfix_vars1(0, _37240)
^  Unify: (274) [user] mfix_vars1(0, _37240)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _37240)
^  Unify: (274) [user] mfix_vars1(0, _37240)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _37240)
^  Unify: (274) [user] mfix_vars1(0, _37240)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _37240)
^  Unify: (274) [user] mfix_vars1(0, _37240)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _37240)
   Call: (275) [system] 0=_37240
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _37242, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1479, 0], [1479, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0], [";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0], [";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0])
   Call: (270) [system] compound_name_arguments(_6000, '$COMMENT', [";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT', [";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0)))
   Call: (267) [system] '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0)\=@='$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _5986)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _87414))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _87414))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _87414))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _87414))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _87414)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _87414)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _93000))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _93000))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _93000)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _93000)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _93000)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0)))
   Call: (267) [system] '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0)\=@='$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _87414)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _5966))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _5966))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _5966))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _5966))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _5966)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _5966)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _115320))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _115320))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _115320)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _115320)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _115320)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0)))
   Call: (267) [system] '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0)\=@='$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _5966)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0)))
   Call: (261) [system] '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0)\=@='$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _144098, [], _144100)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _144098, [], _144100)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _144098, [], _144100)
   Call: (258) [system] atom('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _144098, [], _144100)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _144098, [], _144100)
   Call: (258) [system] compound('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), _153414, _153416)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT', [";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0])
^  Call: (258) [user] subst_vars([";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0], _155300, [], _144100)
^  Unify: (258) [user] subst_vars([";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0], [";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0], [], [])
   Call: (259) [system] var([";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0])
^  Redo: (258) [user] subst_vars([";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0], _155300, [], _144100)
^  Unify: (258) [user] subst_vars([";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0], [_159036|_159038], [], _144100)
^  Call: (259) [user] subst_vars(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _159036, [], _159976)
^  Unify: (259) [user] subst_vars(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", ";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", [], [])
   Call: (260) [system] var(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");")
^  Redo: (259) [user] subst_vars(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _159036, [], _159976)
^  Unify: (259) [user] subst_vars(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _159036, [], _159976)
   Call: (260) [system] atom(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");")
^  Redo: (259) [user] subst_vars(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _159036, [], _159976)
^  Unify: (259) [user] subst_vars(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _159036, [], _159976)
   Call: (260) [system] compound(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");")
^  Redo: (259) [user] subst_vars(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", _159036, [], _159976)
^  Unify: (259) [user] subst_vars(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", ";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", [], [])
^  Exit: (259) [user] subst_vars(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", ";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", [], [])
^  Call: (259) [user] subst_vars([1479, 0], _159038, [], _144100)
^  Unify: (259) [user] subst_vars([1479, 0], [1479, 0], [], [])
   Call: (260) [system] var([1479, 0])
^  Redo: (259) [user] subst_vars([1479, 0], _159038, [], _144100)
^  Unify: (259) [user] subst_vars([1479, 0], [_174908|_174910], [], _144100)
^  Call: (260) [user] subst_vars(1479, _174908, [], _175848)
^  Unify: (260) [user] subst_vars(1479, 1479, [], [])
   Call: (261) [system] var(1479)
^  Redo: (260) [user] subst_vars(1479, _174908, [], _175848)
^  Unify: (260) [user] subst_vars(1479, _174908, [], _175848)
   Call: (261) [system] atom(1479)
^  Redo: (260) [user] subst_vars(1479, _174908, [], _175848)
^  Unify: (260) [user] subst_vars(1479, _174908, [], _175848)
   Call: (261) [system] compound(1479)
^  Redo: (260) [user] subst_vars(1479, _174908, [], _175848)
^  Unify: (260) [user] subst_vars(1479, 1479, [], [])
^  Exit: (260) [user] subst_vars(1479, 1479, [], [])
^  Call: (260) [user] subst_vars([0], _174910, [], _144100)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _174910, [], _144100)
^  Unify: (260) [user] subst_vars([0], [_190780|_190782], [], _144100)
^  Call: (261) [user] subst_vars(0, _190780, [], _191720)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _190780, [], _191720)
^  Unify: (261) [user] subst_vars(0, _190780, [], _191720)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _190780, [], _191720)
^  Unify: (261) [user] subst_vars(0, _190780, [], _191720)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _190780, [], _191720)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _190782, [], _144100)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _190782, [], _144100)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1479, 0], [1479, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0], [";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0], [], [])
   Call: (258) [system] compound_name_arguments(_144098, '$COMMENT', [";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT', [";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), [], [])
   Call: (257) [system] _214138=metta_file_buffer(+, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let nested = run_program(\"!(sealed ($x) (sealed ($a $b) (quote (= ($a $x $c) ($b)))))\");", 1479, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1480, 0, 52957, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$stream_position'(52957, 1480, 0, 52991)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _266874))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _266874))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _266874)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _266874)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _266874)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _266874)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _272486))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _272486))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _272486))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _272486))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _272486)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _272486)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _278072))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _278072))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _278072)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _278072)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _278072)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _278072)
   Call: (270) [system] var('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _278072)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$VAR'(_285532))
   Call: (270) [system] atom('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _278072)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _278072)
   Call: (270) [system] '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _278072)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _278072)
   Call: (270) [system] '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _278072)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _278072)
   Call: (270) [system] '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0)==[_294812, _294818]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _278072)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _278072)
   Call: (270) [system] is_list('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _278072)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _278072)
   Call: (270) [system] string('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _278072)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _278072)
   Call: (270) [system] compound('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _305014, _305016)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT', [";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0], _308756)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0], _308756)
   Call: (271) [apply] apply:maplist_([";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0], _308756, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0], [_311574|_311576], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _311574)
^  Unify: (272) [user] mfix_vars1(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _311574)
   Call: (273) [system] var(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");")
^  Redo: (272) [user] mfix_vars1(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _311574)
^  Unify: (272) [user] mfix_vars1(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", '$VAR'(_316220))
   Call: (273) [system] atom(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");")
^  Redo: (272) [user] mfix_vars1(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _311574)
^  Unify: (272) [user] mfix_vars1(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _311574)
   Call: (273) [system] ";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");"==true
^  Redo: (272) [user] mfix_vars1(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _311574)
^  Unify: (272) [user] mfix_vars1(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _311574)
   Call: (273) [system] ";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");"==false
^  Redo: (272) [user] mfix_vars1(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _311574)
^  Unify: (272) [user] mfix_vars1(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _311574)
   Call: (273) [system] ";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");"==[_325500, _325506]
^  Redo: (272) [user] mfix_vars1(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _311574)
^  Unify: (272) [user] mfix_vars1(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _311574)
   Call: (273) [system] is_list(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");")
^  Redo: (272) [user] mfix_vars1(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _311574)
^  Unify: (272) [user] mfix_vars1(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _311574)
   Call: (273) [system] string(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");")
   Exit: (273) [system] string(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _311574)
^  Unify: (272) [user] mfix_vars1(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _311574)
   Call: (273) [system] compound(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");")
^  Redo: (272) [user] mfix_vars1(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _311574)
^  Unify: (272) [user] mfix_vars1(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _311574)
^  Call: (273) [user] symbol(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");")
^  Unify: (273) [user] symbol(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");")
   Call: (274) [system] atom(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");")
   Fail: (274) [system] atom(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");")
^  Fail: (273) [user] symbol(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");")
^  Redo: (272) [user] mfix_vars1(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _311574)
   Call: (273) [system] ";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");"=_311574
   Exit: (273) [system] ";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");"=";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");"
^  Exit: (272) [user] mfix_vars1(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", ";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");")
   Call: (272) [apply] apply:maplist_([1480, 0], _311576, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1480, 0], [_349572|_349574], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1480, _349572)
^  Unify: (273) [user] mfix_vars1(1480, _349572)
   Call: (274) [system] var(1480)
^  Redo: (273) [user] mfix_vars1(1480, _349572)
^  Unify: (273) [user] mfix_vars1(1480, '$VAR'(_354218))
   Call: (274) [system] atom(1480)
^  Redo: (273) [user] mfix_vars1(1480, _349572)
^  Unify: (273) [user] mfix_vars1(1480, _349572)
   Call: (274) [system] 1480==true
^  Redo: (273) [user] mfix_vars1(1480, _349572)
^  Unify: (273) [user] mfix_vars1(1480, _349572)
   Call: (274) [system] 1480==false
^  Redo: (273) [user] mfix_vars1(1480, _349572)
^  Unify: (273) [user] mfix_vars1(1480, _349572)
   Call: (274) [system] 1480==[_363498, _363504]
^  Redo: (273) [user] mfix_vars1(1480, _349572)
^  Unify: (273) [user] mfix_vars1(1480, _349572)
   Call: (274) [system] is_list(1480)
^  Redo: (273) [user] mfix_vars1(1480, _349572)
^  Unify: (273) [user] mfix_vars1(1480, _349572)
   Call: (274) [system] string(1480)
^  Redo: (273) [user] mfix_vars1(1480, _349572)
^  Unify: (273) [user] mfix_vars1(1480, _349572)
   Call: (274) [system] compound(1480)
^  Redo: (273) [user] mfix_vars1(1480, _349572)
^  Unify: (273) [user] mfix_vars1(1480, _349572)
^  Call: (274) [user] symbol(1480)
^  Unify: (274) [user] symbol(1480)
   Call: (275) [system] atom(1480)
   Fail: (275) [system] atom(1480)
^  Fail: (274) [user] symbol(1480)
^  Redo: (273) [user] mfix_vars1(1480, _349572)
   Call: (274) [system] 1480=_349572
   Exit: (274) [system] 1480=1480
^  Exit: (273) [user] mfix_vars1(1480, 1480)
   Call: (273) [apply] apply:maplist_([0], _349574, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_383898|_383900], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _383898)
^  Unify: (274) [user] mfix_vars1(0, _383898)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _383898)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_388544))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _383898)
^  Unify: (274) [user] mfix_vars1(0, _383898)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _383898)
^  Unify: (274) [user] mfix_vars1(0, _383898)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _383898)
^  Unify: (274) [user] mfix_vars1(0, _383898)
   Call: (275) [system] 0==[_397824, _397830]
^  Redo: (274) [user] mfix_vars1(0, _383898)
^  Unify: (274) [user] mfix_vars1(0, _383898)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _383898)
^  Unify: (274) [user] mfix_vars1(0, _383898)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _383898)
^  Unify: (274) [user] mfix_vars1(0, _383898)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _383898)
^  Unify: (274) [user] mfix_vars1(0, _383898)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _383898)
   Call: (275) [system] 0=_383898
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _383900, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1480, 0], [1480, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0], [";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0], [";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0])
   Call: (270) [system] compound_name_arguments(_278072, '$COMMENT', [";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT', [";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0)))
   Call: (267) [system] '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0)\=@='$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _272486)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _434072))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _434072))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _434072))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _434072))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _434072)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _434072)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _439658))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _439658))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _439658)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _439658)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _439658)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0)))
   Call: (267) [system] '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0)\=@='$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _434072)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _266874))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _266874))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _266874))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _266874))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _266874)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _266874)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _461978))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _461978))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _461978)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _461978)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _461978)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0)))
   Call: (267) [system] '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0)\=@='$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _266874)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0)))
   Call: (261) [system] '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0)\=@='$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _490756, [], _490758)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _490756, [], _490758)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _490756, [], _490758)
   Call: (258) [system] atom('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _490756, [], _490758)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _490756, [], _490758)
   Call: (258) [system] compound('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), _500072, _500074)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT', [";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0])
^  Call: (258) [user] subst_vars([";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0], _501958, [], _490758)
^  Unify: (258) [user] subst_vars([";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0], [";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0], [], [])
   Call: (259) [system] var([";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0])
^  Redo: (258) [user] subst_vars([";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0], _501958, [], _490758)
^  Unify: (258) [user] subst_vars([";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0], [_505694|_505696], [], _490758)
^  Call: (259) [user] subst_vars(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _505694, [], _506634)
^  Unify: (259) [user] subst_vars(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", ";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", [], [])
   Call: (260) [system] var(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");")
^  Redo: (259) [user] subst_vars(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _505694, [], _506634)
^  Unify: (259) [user] subst_vars(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _505694, [], _506634)
   Call: (260) [system] atom(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");")
^  Redo: (259) [user] subst_vars(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _505694, [], _506634)
^  Unify: (259) [user] subst_vars(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _505694, [], _506634)
   Call: (260) [system] compound(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");")
^  Redo: (259) [user] subst_vars(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", _505694, [], _506634)
^  Unify: (259) [user] subst_vars(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", ";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", [], [])
^  Exit: (259) [user] subst_vars(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", ";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", [], [])
^  Call: (259) [user] subst_vars([1480, 0], _505696, [], _490758)
^  Unify: (259) [user] subst_vars([1480, 0], [1480, 0], [], [])
   Call: (260) [system] var([1480, 0])
^  Redo: (259) [user] subst_vars([1480, 0], _505696, [], _490758)
^  Unify: (259) [user] subst_vars([1480, 0], [_521566|_521568], [], _490758)
^  Call: (260) [user] subst_vars(1480, _521566, [], _522506)
^  Unify: (260) [user] subst_vars(1480, 1480, [], [])
   Call: (261) [system] var(1480)
^  Redo: (260) [user] subst_vars(1480, _5994, [], _5998)
^  Unify: (260) [user] subst_vars(1480, _5994, [], _5998)
   Call: (261) [system] atom(1480)
^  Redo: (260) [user] subst_vars(1480, _5994, [], _5998)
^  Unify: (260) [user] subst_vars(1480, _5994, [], _5998)
   Call: (261) [system] compound(1480)
^  Redo: (260) [user] subst_vars(1480, _5994, [], _5998)
^  Unify: (260) [user] subst_vars(1480, 1480, [], [])
^  Exit: (260) [user] subst_vars(1480, 1480, [], [])
^  Call: (260) [user] subst_vars([0], _5996, [], _5958)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _5996, [], _5958)
^  Unify: (260) [user] subst_vars([0], [_19492|_19494], [], _5958)
^  Call: (261) [user] subst_vars(0, _19492, [], _20432)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _19492, [], _20432)
^  Unify: (261) [user] subst_vars(0, _19492, [], _20432)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _19492, [], _20432)
^  Unify: (261) [user] subst_vars(0, _19492, [], _20432)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _19492, [], _20432)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _19494, [], _5958)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _19494, [], _5958)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1480, 0], [1480, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0], [";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5956, '$COMMENT', [";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT', [";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), [], [])
   Call: (257) [system] _42850=metta_file_buffer(+, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let simple_replace = run_program(\"!(sealed ($x $y) (quote (= ($y $z))))\");", 1480, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1481, 0, 53042, '$COMMENT'(";;", 1481, 0), '$stream_position'(53042, 1481, 0, 53076)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1481, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1481, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1481, 0), _95566))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1481, 0), _95566))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1481, 0), _95566)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1481, 0), _95566)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1481, 0), _95566)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1481, 0), _95566)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1481, 0), _101178))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1481, 0), _101178))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1481, 0), _101178))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1481, 0), _101178))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1481, 0), _101178)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1481, 0), _101178)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1481, 0), _106764))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1481, 0), _106764))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1481, 0), _106764)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1481, 0), _106764)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1481, 0), _106764)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1481, 0), _106764)
   Call: (270) [system] var('$COMMENT'(";;", 1481, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1481, 0), _106764)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1481, 0), '$VAR'(_114224))
   Call: (270) [system] atom('$COMMENT'(";;", 1481, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1481, 0), _106764)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1481, 0), _106764)
   Call: (270) [system] '$COMMENT'(";;", 1481, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1481, 0), _106764)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1481, 0), _106764)
   Call: (270) [system] '$COMMENT'(";;", 1481, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1481, 0), _106764)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1481, 0), _106764)
   Call: (270) [system] '$COMMENT'(";;", 1481, 0)==[_123504, _123510]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1481, 0), _106764)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1481, 0), _106764)
   Call: (270) [system] is_list('$COMMENT'(";;", 1481, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1481, 0), _106764)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1481, 0), _106764)
   Call: (270) [system] string('$COMMENT'(";;", 1481, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1481, 0), _106764)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1481, 0), _106764)
   Call: (270) [system] compound('$COMMENT'(";;", 1481, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1481, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1481, 0), _133706, _133708)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1481, 0), '$COMMENT', [";;", 1481, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1481, 0], _137448)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1481, 0], _137448)
   Call: (271) [apply] apply:maplist_([";;", 1481, 0], _137448, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1481, 0], [_140266|_140268], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _140266)
^  Unify: (272) [user] mfix_vars1(";;", _140266)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _140266)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_144912))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _140266)
^  Unify: (272) [user] mfix_vars1(";;", _140266)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _140266)
^  Unify: (272) [user] mfix_vars1(";;", _140266)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _140266)
^  Unify: (272) [user] mfix_vars1(";;", _140266)
   Call: (273) [system] ";;"==[_154192, _154198]
^  Redo: (272) [user] mfix_vars1(";;", _140266)
^  Unify: (272) [user] mfix_vars1(";;", _140266)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _140266)
^  Unify: (272) [user] mfix_vars1(";;", _140266)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _140266)
^  Unify: (272) [user] mfix_vars1(";;", _140266)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _140266)
^  Unify: (272) [user] mfix_vars1(";;", _140266)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _140266)
   Call: (273) [system] ";;"=_140266
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1481, 0], _140268, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1481, 0], [_178264|_178266], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1481, _178264)
^  Unify: (273) [user] mfix_vars1(1481, _178264)
   Call: (274) [system] var(1481)
^  Redo: (273) [user] mfix_vars1(1481, _178264)
^  Unify: (273) [user] mfix_vars1(1481, '$VAR'(_182910))
   Call: (274) [system] atom(1481)
^  Redo: (273) [user] mfix_vars1(1481, _178264)
^  Unify: (273) [user] mfix_vars1(1481, _178264)
   Call: (274) [system] 1481==true
^  Redo: (273) [user] mfix_vars1(1481, _178264)
^  Unify: (273) [user] mfix_vars1(1481, _178264)
   Call: (274) [system] 1481==false
^  Redo: (273) [user] mfix_vars1(1481, _178264)
^  Unify: (273) [user] mfix_vars1(1481, _178264)
   Call: (274) [system] 1481==[_192190, _192196]
^  Redo: (273) [user] mfix_vars1(1481, _178264)
^  Unify: (273) [user] mfix_vars1(1481, _178264)
   Call: (274) [system] is_list(1481)
^  Redo: (273) [user] mfix_vars1(1481, _178264)
^  Unify: (273) [user] mfix_vars1(1481, _178264)
   Call: (274) [system] string(1481)
^  Redo: (273) [user] mfix_vars1(1481, _178264)
^  Unify: (273) [user] mfix_vars1(1481, _178264)
   Call: (274) [system] compound(1481)
^  Redo: (273) [user] mfix_vars1(1481, _178264)
^  Unify: (273) [user] mfix_vars1(1481, _178264)
^  Call: (274) [user] symbol(1481)
^  Unify: (274) [user] symbol(1481)
   Call: (275) [system] atom(1481)
   Fail: (275) [system] atom(1481)
^  Fail: (274) [user] symbol(1481)
^  Redo: (273) [user] mfix_vars1(1481, _178264)
   Call: (274) [system] 1481=_178264
   Exit: (274) [system] 1481=1481
^  Exit: (273) [user] mfix_vars1(1481, 1481)
   Call: (273) [apply] apply:maplist_([0], _178266, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_212590|_212592], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _212590)
^  Unify: (274) [user] mfix_vars1(0, _212590)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _212590)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_217236))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _212590)
^  Unify: (274) [user] mfix_vars1(0, _212590)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _212590)
^  Unify: (274) [user] mfix_vars1(0, _212590)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _212590)
^  Unify: (274) [user] mfix_vars1(0, _212590)
   Call: (275) [system] 0==[_226516, _226522]
^  Redo: (274) [user] mfix_vars1(0, _212590)
^  Unify: (274) [user] mfix_vars1(0, _212590)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _212590)
^  Unify: (274) [user] mfix_vars1(0, _212590)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _212590)
^  Unify: (274) [user] mfix_vars1(0, _212590)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _212590)
^  Unify: (274) [user] mfix_vars1(0, _212590)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _212590)
   Call: (275) [system] 0=_212590
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _212592, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1481, 0], [1481, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1481, 0], [";;", 1481, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1481, 0], [";;", 1481, 0])
   Call: (270) [system] compound_name_arguments(_106764, '$COMMENT', [";;", 1481, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1481, 0), '$COMMENT', [";;", 1481, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1481, 0)\=@='$COMMENT'(";;", 1481, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1481, 0), _101178)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1481, 0), _262764))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1481, 0), _262764))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1481, 0), _262764))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1481, 0), _262764))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1481, 0), _262764)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1481, 0), _262764)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1481, 0), _268350))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1481, 0), _268350))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1481, 0), _268350)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1481, 0), _268350)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1481, 0), _268350)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1481, 0)\=@='$COMMENT'(";;", 1481, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1481, 0), _262764)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1481, 0), _95566))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1481, 0), _95566))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1481, 0), _95566))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1481, 0), _95566))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1481, 0), _95566)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1481, 0), _95566)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1481, 0), _290670))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1481, 0), _290670))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1481, 0), _290670)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1481, 0), _290670)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1481, 0), _290670)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1481, 0)\=@='$COMMENT'(";;", 1481, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1481, 0), _95566)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1481, 0)\=@='$COMMENT'(";;", 1481, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1481, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1481, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1481, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1481, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1481, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1481, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1481, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1481, 0), _319448, [], _319450)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1481, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1481, 0), _319448, [], _319450)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1481, 0), _319448, [], _319450)
   Call: (258) [system] atom('$COMMENT'(";;", 1481, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1481, 0), _319448, [], _319450)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1481, 0), _319448, [], _319450)
   Call: (258) [system] compound('$COMMENT'(";;", 1481, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1481, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1481, 0), _328764, _328766)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1481, 0), '$COMMENT', [";;", 1481, 0])
^  Call: (258) [user] subst_vars([";;", 1481, 0], _330650, [], _319450)
^  Unify: (258) [user] subst_vars([";;", 1481, 0], [";;", 1481, 0], [], [])
   Call: (259) [system] var([";;", 1481, 0])
^  Redo: (258) [user] subst_vars([";;", 1481, 0], _330650, [], _319450)
^  Unify: (258) [user] subst_vars([";;", 1481, 0], [_334386|_334388], [], _319450)
^  Call: (259) [user] subst_vars(";;", _334386, [], _335326)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _334386, [], _335326)
^  Unify: (259) [user] subst_vars(";;", _334386, [], _335326)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _334386, [], _335326)
^  Unify: (259) [user] subst_vars(";;", _334386, [], _335326)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _334386, [], _335326)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1481, 0], _334388, [], _319450)
^  Unify: (259) [user] subst_vars([1481, 0], [1481, 0], [], [])
   Call: (260) [system] var([1481, 0])
^  Redo: (259) [user] subst_vars([1481, 0], _334388, [], _319450)
^  Unify: (259) [user] subst_vars([1481, 0], [_350258|_350260], [], _319450)
^  Call: (260) [user] subst_vars(1481, _350258, [], _351198)
^  Unify: (260) [user] subst_vars(1481, 1481, [], [])
   Call: (261) [system] var(1481)
^  Redo: (260) [user] subst_vars(1481, _350258, [], _351198)
^  Unify: (260) [user] subst_vars(1481, _350258, [], _351198)
   Call: (261) [system] atom(1481)
^  Redo: (260) [user] subst_vars(1481, _350258, [], _351198)
^  Unify: (260) [user] subst_vars(1481, _350258, [], _351198)
   Call: (261) [system] compound(1481)
^  Redo: (260) [user] subst_vars(1481, _350258, [], _351198)
^  Unify: (260) [user] subst_vars(1481, 1481, [], [])
^  Exit: (260) [user] subst_vars(1481, 1481, [], [])
^  Call: (260) [user] subst_vars([0], _350260, [], _319450)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _350260, [], _319450)
^  Unify: (260) [user] subst_vars([0], [_366130|_366132], [], _319450)
^  Call: (261) [user] subst_vars(0, _366130, [], _367070)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _366130, [], _367070)
^  Unify: (261) [user] subst_vars(0, _366130, [], _367070)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _366130, [], _367070)
^  Unify: (261) [user] subst_vars(0, _366130, [], _367070)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _366130, [], _367070)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _366132, [], _319450)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _366132, [], _319450)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1481, 0], [1481, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1481, 0], [";;", 1481, 0], [], [])
   Call: (258) [system] compound_name_arguments(_319448, '$COMMENT', [";;", 1481, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1481, 0), '$COMMENT', [";;", 1481, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1481, 0), '$COMMENT'(";;", 1481, 0), [], [])
   Call: (257) [system] _389488=metta_file_buffer(+, '$COMMENT'(";;", 1481, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1481, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1481, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1481, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1481, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1481, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1481, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1481, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1481, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1482, 0, 53045, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$stream_position'(53045, 1482, 0, 53079)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _442234))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _442234))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _442234)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _442234)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _442234)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _442234)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _447846))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _447846))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _447846))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _447846))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _447846)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _447846)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _453432))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _453432))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _453432)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _453432)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _453432)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _453432)
   Call: (270) [system] var('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _453432)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$VAR'(_460892))
   Call: (270) [system] atom('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _453432)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _453432)
   Call: (270) [system] '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _453432)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _453432)
   Call: (270) [system] '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _453432)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _453432)
   Call: (270) [system] '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0)==[_470172, _470178]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _453432)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _453432)
   Call: (270) [system] is_list('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _453432)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _453432)
   Call: (270) [system] string('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _453432)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _453432)
   Call: (270) [system] compound('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _480374, _480376)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT', [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0], _484116)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0], _484116)
   Call: (271) [apply] apply:maplist_([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0], _484116, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0], [_486934|_486936], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _486934)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _486934)
   Call: (273) [system] var(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));")
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _486934)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", '$VAR'(_491580))
   Call: (273) [system] atom(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));")
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _486934)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _486934)
   Call: (273) [system] ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));"==true
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _486934)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _486934)
   Call: (273) [system] ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));"==false
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _486934)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _486934)
   Call: (273) [system] ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));"==[_500860, _500866]
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _486934)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _486934)
   Call: (273) [system] is_list(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));")
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _486934)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _486934)
   Call: (273) [system] string(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));")
   Exit: (273) [system] string(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _486934)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _486934)
   Call: (273) [system] compound(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));")
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _486934)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _486934)
^  Call: (273) [user] symbol(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));")
^  Unify: (273) [user] symbol(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));")
   Call: (274) [system] atom(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));")
   Fail: (274) [system] atom(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));")
^  Fail: (273) [user] symbol(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));")
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _486934)
   Call: (273) [system] ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));"=_486934
   Exit: (273) [system] ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));"=";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));"
^  Exit: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));")
   Call: (272) [apply] apply:maplist_([1482, 0], _6054, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1482, 0], [_6942|_6944], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1482, _6942)
^  Unify: (273) [user] mfix_vars1(1482, _6942)
   Call: (274) [system] var(1482)
^  Redo: (273) [user] mfix_vars1(1482, _6942)
^  Unify: (273) [user] mfix_vars1(1482, '$VAR'(_11588))
   Call: (274) [system] atom(1482)
^  Redo: (273) [user] mfix_vars1(1482, _6942)
^  Unify: (273) [user] mfix_vars1(1482, _6942)
   Call: (274) [system] 1482==true
^  Redo: (273) [user] mfix_vars1(1482, _6942)
^  Unify: (273) [user] mfix_vars1(1482, _6942)
   Call: (274) [system] 1482==false
^  Redo: (273) [user] mfix_vars1(1482, _6942)
^  Unify: (273) [user] mfix_vars1(1482, _6942)
   Call: (274) [system] 1482==[_20868, _20874]
^  Redo: (273) [user] mfix_vars1(1482, _6942)
^  Unify: (273) [user] mfix_vars1(1482, _6942)
   Call: (274) [system] is_list(1482)
^  Redo: (273) [user] mfix_vars1(1482, _6942)
^  Unify: (273) [user] mfix_vars1(1482, _6942)
   Call: (274) [system] string(1482)
^  Redo: (273) [user] mfix_vars1(1482, _6942)
^  Unify: (273) [user] mfix_vars1(1482, _6942)
   Call: (274) [system] compound(1482)
^  Redo: (273) [user] mfix_vars1(1482, _6942)
^  Unify: (273) [user] mfix_vars1(1482, _6942)
^  Call: (274) [user] symbol(1482)
^  Unify: (274) [user] symbol(1482)
   Call: (275) [system] atom(1482)
   Fail: (275) [system] atom(1482)
^  Fail: (274) [user] symbol(1482)
^  Redo: (273) [user] mfix_vars1(1482, _6942)
   Call: (274) [system] 1482=_6942
   Exit: (274) [system] 1482=1482
^  Exit: (273) [user] mfix_vars1(1482, 1482)
   Call: (273) [apply] apply:maplist_([0], _6944, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_41268|_41270], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _41268)
^  Unify: (274) [user] mfix_vars1(0, _41268)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _41268)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_45914))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _41268)
^  Unify: (274) [user] mfix_vars1(0, _41268)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _41268)
^  Unify: (274) [user] mfix_vars1(0, _41268)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _41268)
^  Unify: (274) [user] mfix_vars1(0, _41268)
   Call: (275) [system] 0==[_55194, _55200]
^  Redo: (274) [user] mfix_vars1(0, _41268)
^  Unify: (274) [user] mfix_vars1(0, _41268)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _41268)
^  Unify: (274) [user] mfix_vars1(0, _41268)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _41268)
^  Unify: (274) [user] mfix_vars1(0, _41268)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _41268)
^  Unify: (274) [user] mfix_vars1(0, _41268)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _41268)
   Call: (275) [system] 0=_41268
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _41270, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1482, 0], [1482, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0], [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0], [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0])
   Call: (270) [system] compound_name_arguments(_6006, '$COMMENT', [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT', [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0)\=@='$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _5992)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _91442))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _91442))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _91442))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _91442))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _91442)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _91442)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _97028))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _97028))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _97028)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _97028)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _97028)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0)\=@='$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _91442)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _5972))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _5972))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _5972))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _5972))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _5972)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _5972)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _119348))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _119348))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _119348)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _119348)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _119348)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0)\=@='$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _5972)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0)\=@='$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _148126, [], _148128)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _148126, [], _148128)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _148126, [], _148128)
   Call: (258) [system] atom('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _148126, [], _148128)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _148126, [], _148128)
   Call: (258) [system] compound('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), _157442, _157444)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT', [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0])
^  Call: (258) [user] subst_vars([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0], _159328, [], _148128)
^  Unify: (258) [user] subst_vars([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0], [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0], [], [])
   Call: (259) [system] var([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0])
^  Redo: (258) [user] subst_vars([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0], _159328, [], _148128)
^  Unify: (258) [user] subst_vars([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0], [_163064|_163066], [], _148128)
^  Call: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _163064, [], _164004)
^  Unify: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", [], [])
   Call: (260) [system] var(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));")
^  Redo: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _163064, [], _164004)
^  Unify: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _163064, [], _164004)
   Call: (260) [system] atom(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));")
^  Redo: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _163064, [], _164004)
^  Unify: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _163064, [], _164004)
   Call: (260) [system] compound(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));")
^  Redo: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", _163064, [], _164004)
^  Unify: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", [], [])
^  Exit: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", [], [])
^  Call: (259) [user] subst_vars([1482, 0], _163066, [], _148128)
^  Unify: (259) [user] subst_vars([1482, 0], [1482, 0], [], [])
   Call: (260) [system] var([1482, 0])
^  Redo: (259) [user] subst_vars([1482, 0], _163066, [], _148128)
^  Unify: (259) [user] subst_vars([1482, 0], [_178936|_178938], [], _148128)
^  Call: (260) [user] subst_vars(1482, _178936, [], _179876)
^  Unify: (260) [user] subst_vars(1482, 1482, [], [])
   Call: (261) [system] var(1482)
^  Redo: (260) [user] subst_vars(1482, _178936, [], _179876)
^  Unify: (260) [user] subst_vars(1482, _178936, [], _179876)
   Call: (261) [system] atom(1482)
^  Redo: (260) [user] subst_vars(1482, _178936, [], _179876)
^  Unify: (260) [user] subst_vars(1482, _178936, [], _179876)
   Call: (261) [system] compound(1482)
^  Redo: (260) [user] subst_vars(1482, _178936, [], _179876)
^  Unify: (260) [user] subst_vars(1482, 1482, [], [])
^  Exit: (260) [user] subst_vars(1482, 1482, [], [])
^  Call: (260) [user] subst_vars([0], _178938, [], _148128)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _178938, [], _148128)
^  Unify: (260) [user] subst_vars([0], [_194808|_194810], [], _148128)
^  Call: (261) [user] subst_vars(0, _194808, [], _195748)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _194808, [], _195748)
^  Unify: (261) [user] subst_vars(0, _194808, [], _195748)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _194808, [], _195748)
^  Unify: (261) [user] subst_vars(0, _194808, [], _195748)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _194808, [], _195748)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _194810, [], _148128)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _194810, [], _148128)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1482, 0], [1482, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0], [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0], [], [])
   Call: (258) [system] compound_name_arguments(_148126, '$COMMENT', [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT', [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), [], [])
   Call: (257) [system] _218166=metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&nested.unwrap()[0][0], &expr!(\"quote\" (\"=\" (a b c) (z)))));", 1482, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1483, 0, 53167, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$stream_position'(53167, 1483, 0, 53201)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _270912))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _270912))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _270912)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _270912)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _270912)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _270912)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _276524))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _276524))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _276524))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _276524))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _276524)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _276524)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _282110))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _282110))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _282110)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _282110)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _282110)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _282110)
   Call: (270) [system] var('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _282110)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$VAR'(_289570))
   Call: (270) [system] atom('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _282110)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _282110)
   Call: (270) [system] '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _282110)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _282110)
   Call: (270) [system] '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _282110)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _282110)
   Call: (270) [system] '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0)==[_298850, _298856]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _282110)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _282110)
   Call: (270) [system] is_list('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _282110)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _282110)
   Call: (270) [system] string('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _282110)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _282110)
   Call: (270) [system] compound('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _309052, _309054)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT', [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0], _312794)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0], _312794)
   Call: (271) [apply] apply:maplist_([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0], _312794, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0], [_315612|_315614], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _315612)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _315612)
   Call: (273) [system] var(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));")
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _315612)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", '$VAR'(_320258))
   Call: (273) [system] atom(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));")
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _315612)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _315612)
   Call: (273) [system] ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));"==true
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _315612)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _315612)
   Call: (273) [system] ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));"==false
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _315612)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _315612)
   Call: (273) [system] ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));"==[_329538, _329544]
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _315612)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _315612)
   Call: (273) [system] is_list(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));")
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _315612)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _315612)
   Call: (273) [system] string(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));")
   Exit: (273) [system] string(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _315612)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _315612)
   Call: (273) [system] compound(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));")
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _315612)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _315612)
^  Call: (273) [user] symbol(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));")
^  Unify: (273) [user] symbol(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));")
   Call: (274) [system] atom(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));")
   Fail: (274) [system] atom(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));")
^  Fail: (273) [user] symbol(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));")
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _315612)
   Call: (273) [system] ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));"=_315612
   Exit: (273) [system] ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));"=";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));"
^  Exit: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));")
   Call: (272) [apply] apply:maplist_([1483, 0], _315614, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1483, 0], [_353610|_353612], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1483, _353610)
^  Unify: (273) [user] mfix_vars1(1483, _353610)
   Call: (274) [system] var(1483)
^  Redo: (273) [user] mfix_vars1(1483, _353610)
^  Unify: (273) [user] mfix_vars1(1483, '$VAR'(_358256))
   Call: (274) [system] atom(1483)
^  Redo: (273) [user] mfix_vars1(1483, _353610)
^  Unify: (273) [user] mfix_vars1(1483, _353610)
   Call: (274) [system] 1483==true
^  Redo: (273) [user] mfix_vars1(1483, _353610)
^  Unify: (273) [user] mfix_vars1(1483, _353610)
   Call: (274) [system] 1483==false
^  Redo: (273) [user] mfix_vars1(1483, _353610)
^  Unify: (273) [user] mfix_vars1(1483, _353610)
   Call: (274) [system] 1483==[_367536, _367542]
^  Redo: (273) [user] mfix_vars1(1483, _353610)
^  Unify: (273) [user] mfix_vars1(1483, _353610)
   Call: (274) [system] is_list(1483)
^  Redo: (273) [user] mfix_vars1(1483, _353610)
^  Unify: (273) [user] mfix_vars1(1483, _353610)
   Call: (274) [system] string(1483)
^  Redo: (273) [user] mfix_vars1(1483, _353610)
^  Unify: (273) [user] mfix_vars1(1483, _353610)
   Call: (274) [system] compound(1483)
^  Redo: (273) [user] mfix_vars1(1483, _353610)
^  Unify: (273) [user] mfix_vars1(1483, _353610)
^  Call: (274) [user] symbol(1483)
^  Unify: (274) [user] symbol(1483)
   Call: (275) [system] atom(1483)
   Fail: (275) [system] atom(1483)
^  Fail: (274) [user] symbol(1483)
^  Redo: (273) [user] mfix_vars1(1483, _353610)
   Call: (274) [system] 1483=_353610
   Exit: (274) [system] 1483=1483
^  Exit: (273) [user] mfix_vars1(1483, 1483)
   Call: (273) [apply] apply:maplist_([0], _353612, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_387936|_387938], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _387936)
^  Unify: (274) [user] mfix_vars1(0, _387936)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _387936)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_392582))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _387936)
^  Unify: (274) [user] mfix_vars1(0, _387936)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _387936)
^  Unify: (274) [user] mfix_vars1(0, _387936)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _387936)
^  Unify: (274) [user] mfix_vars1(0, _387936)
   Call: (275) [system] 0==[_401862, _401868]
^  Redo: (274) [user] mfix_vars1(0, _387936)
^  Unify: (274) [user] mfix_vars1(0, _387936)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _387936)
^  Unify: (274) [user] mfix_vars1(0, _387936)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _387936)
^  Unify: (274) [user] mfix_vars1(0, _387936)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _387936)
^  Unify: (274) [user] mfix_vars1(0, _387936)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _387936)
   Call: (275) [system] 0=_387936
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _387938, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1483, 0], [1483, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0], [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0], [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0])
   Call: (270) [system] compound_name_arguments(_282110, '$COMMENT', [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT', [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0)\=@='$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _276524)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _438110))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _438110))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _438110))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _438110))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _438110)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _438110)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _443696))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _443696))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _443696)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _443696)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _443696)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0)\=@='$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _438110)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _270912))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _270912))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _270912))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _270912))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _270912)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _270912)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _466016))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _466016))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _466016)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _466016)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _466016)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0)\=@='$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _270912)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0)\=@='$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _494794, [], _494796)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _494794, [], _494796)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _494794, [], _494796)
   Call: (258) [system] atom('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _494794, [], _494796)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _494794, [], _494796)
   Call: (258) [system] compound('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), _504110, _504112)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT', [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0])
^  Call: (258) [user] subst_vars([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0], _505996, [], _494796)
^  Unify: (258) [user] subst_vars([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0], [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0], [], [])
   Call: (259) [system] var([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0])
^  Redo: (258) [user] subst_vars([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0], _505996, [], _494796)
^  Unify: (258) [user] subst_vars([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0], [_509732|_509734], [], _494796)
^  Call: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _509732, [], _510672)
^  Unify: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", [], [])
   Call: (260) [system] var(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));")
^  Redo: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _509732, [], _510672)
^  Unify: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _509732, [], _510672)
   Call: (260) [system] atom(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));")
^  Redo: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _509732, [], _510672)
^  Unify: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _509732, [], _510672)
   Call: (260) [system] compound(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));")
^  Redo: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", _509732, [], _510672)
^  Unify: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", [], [])
^  Exit: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", [], [])
^  Call: (259) [user] subst_vars([1483, 0], _509734, [], _494796)
^  Unify: (259) [user] subst_vars([1483, 0], [1483, 0], [], [])
   Call: (260) [system] var([1483, 0])
^  Redo: (259) [user] subst_vars([1483, 0], _5998, [], _5968)
^  Unify: (259) [user] subst_vars([1483, 0], [_7684|_7686], [], _5968)
^  Call: (260) [user] subst_vars(1483, _7684, [], _8624)
^  Unify: (260) [user] subst_vars(1483, 1483, [], [])
   Call: (261) [system] var(1483)
^  Redo: (260) [user] subst_vars(1483, _7684, [], _8624)
^  Unify: (260) [user] subst_vars(1483, _7684, [], _8624)
   Call: (261) [system] atom(1483)
^  Redo: (260) [user] subst_vars(1483, _7684, [], _8624)
^  Unify: (260) [user] subst_vars(1483, _7684, [], _8624)
   Call: (261) [system] compound(1483)
^  Redo: (260) [user] subst_vars(1483, _7684, [], _8624)
^  Unify: (260) [user] subst_vars(1483, 1483, [], [])
^  Exit: (260) [user] subst_vars(1483, 1483, [], [])
^  Call: (260) [user] subst_vars([0], _7686, [], _5968)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _7686, [], _5968)
^  Unify: (260) [user] subst_vars([0], [_23556|_23558], [], _5968)
^  Call: (261) [user] subst_vars(0, _23556, [], _24496)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _23556, [], _24496)
^  Unify: (261) [user] subst_vars(0, _23556, [], _24496)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _23556, [], _24496)
^  Unify: (261) [user] subst_vars(0, _23556, [], _24496)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _23556, [], _24496)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _23558, [], _5968)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _23558, [], _5968)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1483, 0], [1483, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0], [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5966, '$COMMENT', [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT', [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), [], [])
   Call: (257) [system] _46914=metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&simple_replace.unwrap()[0][0], &expr!(\"quote\" (\"=\" (y z)))));", 1483, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1484, 0, 53291, '$COMMENT'(";;    }", 1484, 0), '$stream_position'(53291, 1484, 0, 53325)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1484, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1484, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    }", 1484, 0), _99632))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1484, 0), _99632))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    }", 1484, 0), _99632)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1484, 0), _99632)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1484, 0), _99632)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1484, 0), _99632)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    }", 1484, 0), _105244))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1484, 0), _105244))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1484, 0), _105244))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1484, 0), _105244))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1484, 0), _105244)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1484, 0), _105244)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    }", 1484, 0), _110830))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1484, 0), _110830))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    }", 1484, 0), _110830)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1484, 0), _110830)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1484, 0), _110830)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1484, 0), _110830)
   Call: (270) [system] var('$COMMENT'(";;    }", 1484, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1484, 0), _110830)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1484, 0), '$VAR'(_118290))
   Call: (270) [system] atom('$COMMENT'(";;    }", 1484, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1484, 0), _110830)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1484, 0), _110830)
   Call: (270) [system] '$COMMENT'(";;    }", 1484, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1484, 0), _110830)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1484, 0), _110830)
   Call: (270) [system] '$COMMENT'(";;    }", 1484, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1484, 0), _110830)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1484, 0), _110830)
   Call: (270) [system] '$COMMENT'(";;    }", 1484, 0)==[_127570, _127576]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1484, 0), _110830)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1484, 0), _110830)
   Call: (270) [system] is_list('$COMMENT'(";;    }", 1484, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1484, 0), _110830)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1484, 0), _110830)
   Call: (270) [system] string('$COMMENT'(";;    }", 1484, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1484, 0), _110830)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1484, 0), _110830)
   Call: (270) [system] compound('$COMMENT'(";;    }", 1484, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    }", 1484, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1484, 0), _137772, _137774)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1484, 0), '$COMMENT', [";;    }", 1484, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    }", 1484, 0], _141514)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1484, 0], _141514)
   Call: (271) [apply] apply:maplist_([";;    }", 1484, 0], _141514, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    }", 1484, 0], [_144332|_144334], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    }", _144332)
^  Unify: (272) [user] mfix_vars1(";;    }", _144332)
   Call: (273) [system] var(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _144332)
^  Unify: (272) [user] mfix_vars1(";;    }", '$VAR'(_148978))
   Call: (273) [system] atom(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _144332)
^  Unify: (272) [user] mfix_vars1(";;    }", _144332)
   Call: (273) [system] ";;    }"==true
^  Redo: (272) [user] mfix_vars1(";;    }", _144332)
^  Unify: (272) [user] mfix_vars1(";;    }", _144332)
   Call: (273) [system] ";;    }"==false
^  Redo: (272) [user] mfix_vars1(";;    }", _144332)
^  Unify: (272) [user] mfix_vars1(";;    }", _144332)
   Call: (273) [system] ";;    }"==[_158258, _158264]
^  Redo: (272) [user] mfix_vars1(";;    }", _144332)
^  Unify: (272) [user] mfix_vars1(";;    }", _144332)
   Call: (273) [system] is_list(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _144332)
^  Unify: (272) [user] mfix_vars1(";;    }", _144332)
   Call: (273) [system] string(";;    }")
   Exit: (273) [system] string(";;    }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    }", _144332)
^  Unify: (272) [user] mfix_vars1(";;    }", _144332)
   Call: (273) [system] compound(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _144332)
^  Unify: (272) [user] mfix_vars1(";;    }", _144332)
^  Call: (273) [user] symbol(";;    }")
^  Unify: (273) [user] symbol(";;    }")
   Call: (274) [system] atom(";;    }")
   Fail: (274) [system] atom(";;    }")
^  Fail: (273) [user] symbol(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _144332)
   Call: (273) [system] ";;    }"=_144332
   Exit: (273) [system] ";;    }"=";;    }"
^  Exit: (272) [user] mfix_vars1(";;    }", ";;    }")
   Call: (272) [apply] apply:maplist_([1484, 0], _144334, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1484, 0], [_182330|_182332], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1484, _182330)
^  Unify: (273) [user] mfix_vars1(1484, _182330)
   Call: (274) [system] var(1484)
^  Redo: (273) [user] mfix_vars1(1484, _182330)
^  Unify: (273) [user] mfix_vars1(1484, '$VAR'(_186976))
   Call: (274) [system] atom(1484)
^  Redo: (273) [user] mfix_vars1(1484, _182330)
^  Unify: (273) [user] mfix_vars1(1484, _182330)
   Call: (274) [system] 1484==true
^  Redo: (273) [user] mfix_vars1(1484, _182330)
^  Unify: (273) [user] mfix_vars1(1484, _182330)
   Call: (274) [system] 1484==false
^  Redo: (273) [user] mfix_vars1(1484, _182330)
^  Unify: (273) [user] mfix_vars1(1484, _182330)
   Call: (274) [system] 1484==[_196256, _196262]
^  Redo: (273) [user] mfix_vars1(1484, _182330)
^  Unify: (273) [user] mfix_vars1(1484, _182330)
   Call: (274) [system] is_list(1484)
^  Redo: (273) [user] mfix_vars1(1484, _182330)
^  Unify: (273) [user] mfix_vars1(1484, _182330)
   Call: (274) [system] string(1484)
^  Redo: (273) [user] mfix_vars1(1484, _182330)
^  Unify: (273) [user] mfix_vars1(1484, _182330)
   Call: (274) [system] compound(1484)
^  Redo: (273) [user] mfix_vars1(1484, _182330)
^  Unify: (273) [user] mfix_vars1(1484, _182330)
^  Call: (274) [user] symbol(1484)
^  Unify: (274) [user] symbol(1484)
   Call: (275) [system] atom(1484)
   Fail: (275) [system] atom(1484)
^  Fail: (274) [user] symbol(1484)
^  Redo: (273) [user] mfix_vars1(1484, _182330)
   Call: (274) [system] 1484=_182330
   Exit: (274) [system] 1484=1484
^  Exit: (273) [user] mfix_vars1(1484, 1484)
   Call: (273) [apply] apply:maplist_([0], _182332, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_216656|_216658], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _216656)
^  Unify: (274) [user] mfix_vars1(0, _216656)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _216656)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_221302))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _216656)
^  Unify: (274) [user] mfix_vars1(0, _216656)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _216656)
^  Unify: (274) [user] mfix_vars1(0, _216656)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _216656)
^  Unify: (274) [user] mfix_vars1(0, _216656)
   Call: (275) [system] 0==[_230582, _230588]
^  Redo: (274) [user] mfix_vars1(0, _216656)
^  Unify: (274) [user] mfix_vars1(0, _216656)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _216656)
^  Unify: (274) [user] mfix_vars1(0, _216656)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _216656)
^  Unify: (274) [user] mfix_vars1(0, _216656)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _216656)
^  Unify: (274) [user] mfix_vars1(0, _216656)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _216656)
   Call: (275) [system] 0=_216656
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _216658, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1484, 0], [1484, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    }", 1484, 0], [";;    }", 1484, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1484, 0], [";;    }", 1484, 0])
   Call: (270) [system] compound_name_arguments(_110830, '$COMMENT', [";;    }", 1484, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1484, 0), '$COMMENT', [";;    }", 1484, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1484, 0)\=@='$COMMENT'(";;    }", 1484, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1484, 0), _105244)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    }", 1484, 0), _266830))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1484, 0), _266830))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1484, 0), _266830))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1484, 0), _266830))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1484, 0), _266830)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1484, 0), _266830)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    }", 1484, 0), _272416))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1484, 0), _272416))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    }", 1484, 0), _272416)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1484, 0), _272416)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    }", 1484, 0), _272416)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1484, 0)\=@='$COMMENT'(";;    }", 1484, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1484, 0), _266830)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    }", 1484, 0), _99632))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1484, 0), _99632))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1484, 0), _99632))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1484, 0), _99632))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1484, 0), _99632)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1484, 0), _99632)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    }", 1484, 0), _294736))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1484, 0), _294736))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    }", 1484, 0), _294736)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1484, 0), _294736)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    }", 1484, 0), _294736)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1484, 0)\=@='$COMMENT'(";;    }", 1484, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1484, 0), _99632)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0)))
   Call: (261) [system] '$COMMENT'(";;    }", 1484, 0)\=@='$COMMENT'(";;    }", 1484, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1484, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1484, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1484, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1484, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1484, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    }", 1484, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    }", 1484, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    }", 1484, 0), _323514, [], _323516)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    }", 1484, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1484, 0), _323514, [], _323516)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1484, 0), _323514, [], _323516)
   Call: (258) [system] atom('$COMMENT'(";;    }", 1484, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1484, 0), _323514, [], _323516)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1484, 0), _323514, [], _323516)
   Call: (258) [system] compound('$COMMENT'(";;    }", 1484, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    }", 1484, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1484, 0), _332830, _332832)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1484, 0), '$COMMENT', [";;    }", 1484, 0])
^  Call: (258) [user] subst_vars([";;    }", 1484, 0], _334716, [], _323516)
^  Unify: (258) [user] subst_vars([";;    }", 1484, 0], [";;    }", 1484, 0], [], [])
   Call: (259) [system] var([";;    }", 1484, 0])
^  Redo: (258) [user] subst_vars([";;    }", 1484, 0], _334716, [], _323516)
^  Unify: (258) [user] subst_vars([";;    }", 1484, 0], [_338452|_338454], [], _323516)
^  Call: (259) [user] subst_vars(";;    }", _338452, [], _339392)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
   Call: (260) [system] var(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _338452, [], _339392)
^  Unify: (259) [user] subst_vars(";;    }", _338452, [], _339392)
   Call: (260) [system] atom(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _338452, [], _339392)
^  Unify: (259) [user] subst_vars(";;    }", _338452, [], _339392)
   Call: (260) [system] compound(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _338452, [], _339392)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Exit: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Call: (259) [user] subst_vars([1484, 0], _338454, [], _323516)
^  Unify: (259) [user] subst_vars([1484, 0], [1484, 0], [], [])
   Call: (260) [system] var([1484, 0])
^  Redo: (259) [user] subst_vars([1484, 0], _338454, [], _323516)
^  Unify: (259) [user] subst_vars([1484, 0], [_354324|_354326], [], _323516)
^  Call: (260) [user] subst_vars(1484, _354324, [], _355264)
^  Unify: (260) [user] subst_vars(1484, 1484, [], [])
   Call: (261) [system] var(1484)
^  Redo: (260) [user] subst_vars(1484, _354324, [], _355264)
^  Unify: (260) [user] subst_vars(1484, _354324, [], _355264)
   Call: (261) [system] atom(1484)
^  Redo: (260) [user] subst_vars(1484, _354324, [], _355264)
^  Unify: (260) [user] subst_vars(1484, _354324, [], _355264)
   Call: (261) [system] compound(1484)
^  Redo: (260) [user] subst_vars(1484, _354324, [], _355264)
^  Unify: (260) [user] subst_vars(1484, 1484, [], [])
^  Exit: (260) [user] subst_vars(1484, 1484, [], [])
^  Call: (260) [user] subst_vars([0], _354326, [], _323516)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _354326, [], _323516)
^  Unify: (260) [user] subst_vars([0], [_370196|_370198], [], _323516)
^  Call: (261) [user] subst_vars(0, _370196, [], _371136)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _370196, [], _371136)
^  Unify: (261) [user] subst_vars(0, _370196, [], _371136)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _370196, [], _371136)
^  Unify: (261) [user] subst_vars(0, _370196, [], _371136)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _370196, [], _371136)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _370198, [], _323516)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _370198, [], _323516)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1484, 0], [1484, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    }", 1484, 0], [";;    }", 1484, 0], [], [])
   Call: (258) [system] compound_name_arguments(_323514, '$COMMENT', [";;    }", 1484, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1484, 0), '$COMMENT', [";;    }", 1484, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    }", 1484, 0), '$COMMENT'(";;    }", 1484, 0), [], [])
   Call: (257) [system] _393554=metta_file_buffer(+, '$COMMENT'(";;    }", 1484, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    }", 1484, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    }", 1484, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1484, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1484, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1484, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1484, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1484, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1484, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1485, 0, 53299, '$COMMENT'(";; Converted:", 1485, 0), '$stream_position'(53299, 1485, 0, 53333)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1485, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1485, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1485, 0), _446272))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1485, 0), _446272))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1485, 0), _446272)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1485, 0), _446272)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1485, 0), _446272)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1485, 0), _446272)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1485, 0), _451884))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1485, 0), _451884))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1485, 0), _451884))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1485, 0), _451884))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1485, 0), _451884)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1485, 0), _451884)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1485, 0), _457470))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1485, 0), _457470))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1485, 0), _457470)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1485, 0), _457470)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1485, 0), _457470)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1485, 0), _457470)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1485, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1485, 0), _457470)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1485, 0), '$VAR'(_464930))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1485, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1485, 0), _457470)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1485, 0), _457470)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1485, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1485, 0), _457470)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1485, 0), _457470)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1485, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1485, 0), _457470)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1485, 0), _457470)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1485, 0)==[_474210, _474216]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1485, 0), _457470)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1485, 0), _457470)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1485, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1485, 0), _457470)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1485, 0), _457470)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1485, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1485, 0), _457470)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1485, 0), _457470)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1485, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1485, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1485, 0), _484412, _484414)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1485, 0), '$COMMENT', [";; Converted:", 1485, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1485, 0], _488154)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1485, 0], _488154)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1485, 0], _488154, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1485, 0], [_490972|_490974], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _490972)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _490972)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _490972)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_495618))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _490972)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _490972)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _490972)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _490972)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _490972)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _490972)
   Call: (273) [system] ";; Converted:"==[_504898, _504904]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _490972)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _490972)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _490972)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _490972)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _490972)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _490972)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _490972)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _490972)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _6024)
   Call: (273) [system] ";; Converted:"=_6024
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1485, 0], _6026, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1485, 0], [_11064|_11066], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1485, _11064)
^  Unify: (273) [user] mfix_vars1(1485, _11064)
   Call: (274) [system] var(1485)
^  Redo: (273) [user] mfix_vars1(1485, _11064)
^  Unify: (273) [user] mfix_vars1(1485, '$VAR'(_15710))
   Call: (274) [system] atom(1485)
^  Redo: (273) [user] mfix_vars1(1485, _11064)
^  Unify: (273) [user] mfix_vars1(1485, _11064)
   Call: (274) [system] 1485==true
^  Redo: (273) [user] mfix_vars1(1485, _11064)
^  Unify: (273) [user] mfix_vars1(1485, _11064)
   Call: (274) [system] 1485==false
^  Redo: (273) [user] mfix_vars1(1485, _11064)
^  Unify: (273) [user] mfix_vars1(1485, _11064)
   Call: (274) [system] 1485==[_24990, _24996]
^  Redo: (273) [user] mfix_vars1(1485, _11064)
^  Unify: (273) [user] mfix_vars1(1485, _11064)
   Call: (274) [system] is_list(1485)
^  Redo: (273) [user] mfix_vars1(1485, _11064)
^  Unify: (273) [user] mfix_vars1(1485, _11064)
   Call: (274) [system] string(1485)
^  Redo: (273) [user] mfix_vars1(1485, _11064)
^  Unify: (273) [user] mfix_vars1(1485, _11064)
   Call: (274) [system] compound(1485)
^  Redo: (273) [user] mfix_vars1(1485, _11064)
^  Unify: (273) [user] mfix_vars1(1485, _11064)
^  Call: (274) [user] symbol(1485)
^  Unify: (274) [user] symbol(1485)
   Call: (275) [system] atom(1485)
   Fail: (275) [system] atom(1485)
^  Fail: (274) [user] symbol(1485)
^  Redo: (273) [user] mfix_vars1(1485, _11064)
   Call: (274) [system] 1485=_11064
   Exit: (274) [system] 1485=1485
^  Exit: (273) [user] mfix_vars1(1485, 1485)
   Call: (273) [apply] apply:maplist_([0], _11066, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_45390|_45392], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _45390)
^  Unify: (274) [user] mfix_vars1(0, _45390)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _45390)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_50036))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _45390)
^  Unify: (274) [user] mfix_vars1(0, _45390)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _45390)
^  Unify: (274) [user] mfix_vars1(0, _45390)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _45390)
^  Unify: (274) [user] mfix_vars1(0, _45390)
   Call: (275) [system] 0==[_59316, _59322]
^  Redo: (274) [user] mfix_vars1(0, _45390)
^  Unify: (274) [user] mfix_vars1(0, _45390)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _45390)
^  Unify: (274) [user] mfix_vars1(0, _45390)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _45390)
^  Unify: (274) [user] mfix_vars1(0, _45390)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _45390)
^  Unify: (274) [user] mfix_vars1(0, _45390)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _45390)
   Call: (275) [system] 0=_45390
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _45392, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1485, 0], [1485, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1485, 0], [";; Converted:", 1485, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1485, 0], [";; Converted:", 1485, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";; Converted:", 1485, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1485, 0), '$COMMENT', [";; Converted:", 1485, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1485, 0)\=@='$COMMENT'(";; Converted:", 1485, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1485, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1485, 0), _95564))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1485, 0), _95564))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1485, 0), _95564))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1485, 0), _95564))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1485, 0), _95564)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1485, 0), _95564)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1485, 0), _101150))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1485, 0), _101150))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1485, 0), _101150)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1485, 0), _101150)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1485, 0), _101150)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1485, 0)\=@='$COMMENT'(";; Converted:", 1485, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1485, 0), _95564)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1485, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1485, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1485, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1485, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1485, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1485, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1485, 0), _123470))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1485, 0), _123470))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1485, 0), _123470)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1485, 0), _123470)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1485, 0), _123470)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1485, 0)\=@='$COMMENT'(";; Converted:", 1485, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1485, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1485, 0)\=@='$COMMENT'(";; Converted:", 1485, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1485, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1485, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1485, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1485, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1485, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1485, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1485, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1485, 0), _152248, [], _152250)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1485, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1485, 0), _152248, [], _152250)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1485, 0), _152248, [], _152250)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1485, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1485, 0), _152248, [], _152250)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1485, 0), _152248, [], _152250)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1485, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1485, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1485, 0), _161564, _161566)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1485, 0), '$COMMENT', [";; Converted:", 1485, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1485, 0], _163450, [], _152250)
^  Unify: (258) [user] subst_vars([";; Converted:", 1485, 0], [";; Converted:", 1485, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1485, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1485, 0], _163450, [], _152250)
^  Unify: (258) [user] subst_vars([";; Converted:", 1485, 0], [_167186|_167188], [], _152250)
^  Call: (259) [user] subst_vars(";; Converted:", _167186, [], _168126)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _167186, [], _168126)
^  Unify: (259) [user] subst_vars(";; Converted:", _167186, [], _168126)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _167186, [], _168126)
^  Unify: (259) [user] subst_vars(";; Converted:", _167186, [], _168126)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _167186, [], _168126)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1485, 0], _167188, [], _152250)
^  Unify: (259) [user] subst_vars([1485, 0], [1485, 0], [], [])
   Call: (260) [system] var([1485, 0])
^  Redo: (259) [user] subst_vars([1485, 0], _167188, [], _152250)
^  Unify: (259) [user] subst_vars([1485, 0], [_183058|_183060], [], _152250)
^  Call: (260) [user] subst_vars(1485, _183058, [], _183998)
^  Unify: (260) [user] subst_vars(1485, 1485, [], [])
   Call: (261) [system] var(1485)
^  Redo: (260) [user] subst_vars(1485, _183058, [], _183998)
^  Unify: (260) [user] subst_vars(1485, _183058, [], _183998)
   Call: (261) [system] atom(1485)
^  Redo: (260) [user] subst_vars(1485, _183058, [], _183998)
^  Unify: (260) [user] subst_vars(1485, _183058, [], _183998)
   Call: (261) [system] compound(1485)
^  Redo: (260) [user] subst_vars(1485, _183058, [], _183998)
^  Unify: (260) [user] subst_vars(1485, 1485, [], [])
^  Exit: (260) [user] subst_vars(1485, 1485, [], [])
^  Call: (260) [user] subst_vars([0], _183060, [], _152250)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _183060, [], _152250)
^  Unify: (260) [user] subst_vars([0], [_198930|_198932], [], _152250)
^  Call: (261) [user] subst_vars(0, _198930, [], _199870)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _198930, [], _199870)
^  Unify: (261) [user] subst_vars(0, _198930, [], _199870)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _198930, [], _199870)
^  Unify: (261) [user] subst_vars(0, _198930, [], _199870)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _198930, [], _199870)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _198932, [], _152250)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _198932, [], _152250)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1485, 0], [1485, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1485, 0], [";; Converted:", 1485, 0], [], [])
   Call: (258) [system] compound_name_arguments(_152248, '$COMMENT', [";; Converted:", 1485, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1485, 0), '$COMMENT', [";; Converted:", 1485, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1485, 0), '$COMMENT'(";; Converted:", 1485, 0), [], [])
   Call: (257) [system] _222288=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1485, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1485, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1485, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1485, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1485, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1485, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1485, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1485, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1485, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1489, 0, 53482, '$COMMENT'(";; Original:", 1489, 0), '$stream_position'(53482, 1489, 0, 53516)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1489, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1489, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1489, 0), _275006))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1489, 0), _275006))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1489, 0), _275006)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1489, 0), _275006)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1489, 0), _275006)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1489, 0), _275006)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1489, 0), _280618))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1489, 0), _280618))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1489, 0), _280618))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1489, 0), _280618))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1489, 0), _280618)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1489, 0), _280618)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1489, 0), _286204))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1489, 0), _286204))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1489, 0), _286204)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1489, 0), _286204)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1489, 0), _286204)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1489, 0), _286204)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1489, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1489, 0), _286204)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1489, 0), '$VAR'(_293664))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1489, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1489, 0), _286204)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1489, 0), _286204)
   Call: (270) [system] '$COMMENT'(";; Original:", 1489, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1489, 0), _286204)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1489, 0), _286204)
   Call: (270) [system] '$COMMENT'(";; Original:", 1489, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1489, 0), _286204)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1489, 0), _286204)
   Call: (270) [system] '$COMMENT'(";; Original:", 1489, 0)==[_302944, _302950]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1489, 0), _286204)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1489, 0), _286204)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1489, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1489, 0), _286204)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1489, 0), _286204)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1489, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1489, 0), _286204)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1489, 0), _286204)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1489, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1489, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1489, 0), _313146, _313148)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1489, 0), '$COMMENT', [";; Original:", 1489, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1489, 0], _316888)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1489, 0], _316888)
   Call: (271) [apply] apply:maplist_([";; Original:", 1489, 0], _316888, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1489, 0], [_319706|_319708], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _319706)
^  Unify: (272) [user] mfix_vars1(";; Original:", _319706)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _319706)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_324352))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _319706)
^  Unify: (272) [user] mfix_vars1(";; Original:", _319706)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _319706)
^  Unify: (272) [user] mfix_vars1(";; Original:", _319706)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _319706)
^  Unify: (272) [user] mfix_vars1(";; Original:", _319706)
   Call: (273) [system] ";; Original:"==[_333632, _333638]
^  Redo: (272) [user] mfix_vars1(";; Original:", _319706)
^  Unify: (272) [user] mfix_vars1(";; Original:", _319706)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _319706)
^  Unify: (272) [user] mfix_vars1(";; Original:", _319706)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _319706)
^  Unify: (272) [user] mfix_vars1(";; Original:", _319706)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _319706)
^  Unify: (272) [user] mfix_vars1(";; Original:", _319706)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _319706)
   Call: (273) [system] ";; Original:"=_319706
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1489, 0], _319708, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1489, 0], [_357704|_357706], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1489, _357704)
^  Unify: (273) [user] mfix_vars1(1489, _357704)
   Call: (274) [system] var(1489)
^  Redo: (273) [user] mfix_vars1(1489, _357704)
^  Unify: (273) [user] mfix_vars1(1489, '$VAR'(_362350))
   Call: (274) [system] atom(1489)
^  Redo: (273) [user] mfix_vars1(1489, _357704)
^  Unify: (273) [user] mfix_vars1(1489, _357704)
   Call: (274) [system] 1489==true
^  Redo: (273) [user] mfix_vars1(1489, _357704)
^  Unify: (273) [user] mfix_vars1(1489, _357704)
   Call: (274) [system] 1489==false
^  Redo: (273) [user] mfix_vars1(1489, _357704)
^  Unify: (273) [user] mfix_vars1(1489, _357704)
   Call: (274) [system] 1489==[_371630, _371636]
^  Redo: (273) [user] mfix_vars1(1489, _357704)
^  Unify: (273) [user] mfix_vars1(1489, _357704)
   Call: (274) [system] is_list(1489)
^  Redo: (273) [user] mfix_vars1(1489, _357704)
^  Unify: (273) [user] mfix_vars1(1489, _357704)
   Call: (274) [system] string(1489)
^  Redo: (273) [user] mfix_vars1(1489, _357704)
^  Unify: (273) [user] mfix_vars1(1489, _357704)
   Call: (274) [system] compound(1489)
^  Redo: (273) [user] mfix_vars1(1489, _357704)
^  Unify: (273) [user] mfix_vars1(1489, _357704)
^  Call: (274) [user] symbol(1489)
^  Unify: (274) [user] symbol(1489)
   Call: (275) [system] atom(1489)
   Fail: (275) [system] atom(1489)
^  Fail: (274) [user] symbol(1489)
^  Redo: (273) [user] mfix_vars1(1489, _357704)
   Call: (274) [system] 1489=_357704
   Exit: (274) [system] 1489=1489
^  Exit: (273) [user] mfix_vars1(1489, 1489)
   Call: (273) [apply] apply:maplist_([0], _357706, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_392030|_392032], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _392030)
^  Unify: (274) [user] mfix_vars1(0, _392030)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _392030)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_396676))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _392030)
^  Unify: (274) [user] mfix_vars1(0, _392030)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _392030)
^  Unify: (274) [user] mfix_vars1(0, _392030)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _392030)
^  Unify: (274) [user] mfix_vars1(0, _392030)
   Call: (275) [system] 0==[_405956, _405962]
^  Redo: (274) [user] mfix_vars1(0, _392030)
^  Unify: (274) [user] mfix_vars1(0, _392030)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _392030)
^  Unify: (274) [user] mfix_vars1(0, _392030)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _392030)
^  Unify: (274) [user] mfix_vars1(0, _392030)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _392030)
^  Unify: (274) [user] mfix_vars1(0, _392030)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _392030)
   Call: (275) [system] 0=_392030
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _392032, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1489, 0], [1489, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1489, 0], [";; Original:", 1489, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1489, 0], [";; Original:", 1489, 0])
   Call: (270) [system] compound_name_arguments(_286204, '$COMMENT', [";; Original:", 1489, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1489, 0), '$COMMENT', [";; Original:", 1489, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1489, 0)\=@='$COMMENT'(";; Original:", 1489, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1489, 0), _280618)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1489, 0), _442204))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1489, 0), _442204))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1489, 0), _442204))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1489, 0), _442204))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1489, 0), _442204)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1489, 0), _442204)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1489, 0), _447790))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1489, 0), _447790))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1489, 0), _447790)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1489, 0), _447790)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1489, 0), _447790)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1489, 0)\=@='$COMMENT'(";; Original:", 1489, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1489, 0), _442204)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1489, 0), _275006))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1489, 0), _275006))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1489, 0), _275006))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1489, 0), _275006))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1489, 0), _275006)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1489, 0), _275006)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1489, 0), _470110))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1489, 0), _470110))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1489, 0), _470110)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1489, 0), _470110)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1489, 0), _470110)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1489, 0)\=@='$COMMENT'(";; Original:", 1489, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1489, 0), _275006)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1489, 0)\=@='$COMMENT'(";; Original:", 1489, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1489, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1489, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1489, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1489, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1489, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1489, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1489, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1489, 0), _498888, [], _498890)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1489, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1489, 0), _498888, [], _498890)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1489, 0), _498888, [], _498890)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1489, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1489, 0), _498888, [], _498890)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1489, 0), _498888, [], _498890)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1489, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1489, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1489, 0), _508204, _508206)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1489, 0), '$COMMENT', [";; Original:", 1489, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1489, 0], _510090, [], _498890)
^  Unify: (258) [user] subst_vars([";; Original:", 1489, 0], [";; Original:", 1489, 0], [], [])
   Call: (259) [system] var([";; Original:", 1489, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1489, 0], _510090, [], _498890)
^  Unify: (258) [user] subst_vars([";; Original:", 1489, 0], [_513826|_513828], [], _498890)
^  Call: (259) [user] subst_vars(";; Original:", _513826, [], _514766)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _513826, [], _514766)
^  Unify: (259) [user] subst_vars(";; Original:", _513826, [], _514766)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _513826, [], _514766)
^  Unify: (259) [user] subst_vars(";; Original:", _513826, [], _514766)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _513826, [], _514766)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1489, 0], _5970, [], _5940)
^  Unify: (259) [user] subst_vars([1489, 0], [1489, 0], [], [])
   Call: (260) [system] var([1489, 0])
^  Redo: (259) [user] subst_vars([1489, 0], _5970, [], _5940)
^  Unify: (259) [user] subst_vars([1489, 0], [_11538|_11540], [], _5940)
^  Call: (260) [user] subst_vars(1489, _11538, [], _12478)
^  Unify: (260) [user] subst_vars(1489, 1489, [], [])
   Call: (261) [system] var(1489)
^  Redo: (260) [user] subst_vars(1489, _11538, [], _12478)
^  Unify: (260) [user] subst_vars(1489, _11538, [], _12478)
   Call: (261) [system] atom(1489)
^  Redo: (260) [user] subst_vars(1489, _11538, [], _12478)
^  Unify: (260) [user] subst_vars(1489, _11538, [], _12478)
   Call: (261) [system] compound(1489)
^  Redo: (260) [user] subst_vars(1489, _11538, [], _12478)
^  Unify: (260) [user] subst_vars(1489, 1489, [], [])
^  Exit: (260) [user] subst_vars(1489, 1489, [], [])
^  Call: (260) [user] subst_vars([0], _11540, [], _5940)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _11540, [], _5940)
^  Unify: (260) [user] subst_vars([0], [_27410|_27412], [], _5940)
^  Call: (261) [user] subst_vars(0, _27410, [], _28350)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _27410, [], _28350)
^  Unify: (261) [user] subst_vars(0, _27410, [], _28350)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _27410, [], _28350)
^  Unify: (261) [user] subst_vars(0, _27410, [], _28350)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _27410, [], _28350)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _27412, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _27412, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1489, 0], [1489, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1489, 0], [";; Original:", 1489, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5938, '$COMMENT', [";; Original:", 1489, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1489, 0), '$COMMENT', [";; Original:", 1489, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1489, 0), '$COMMENT'(";; Original:", 1489, 0), [], [])
   Call: (257) [system] _50768=metta_file_buffer(+, '$COMMENT'(";; Original:", 1489, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1489, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1489, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1489, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1489, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1489, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1489, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1489, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1489, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1490, 0, 53495, '$COMMENT'(";;    #[test]", 1490, 0), '$stream_position'(53495, 1490, 0, 53529)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1490, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1490, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1490, 0), _103486))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1490, 0), _103486))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1490, 0), _103486)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1490, 0), _103486)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1490, 0), _103486)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1490, 0), _103486)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1490, 0), _109098))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1490, 0), _109098))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1490, 0), _109098))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1490, 0), _109098))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1490, 0), _109098)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1490, 0), _109098)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    #[test]", 1490, 0), _114684))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1490, 0), _114684))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    #[test]", 1490, 0), _114684)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1490, 0), _114684)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1490, 0), _114684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1490, 0), _114684)
   Call: (270) [system] var('$COMMENT'(";;    #[test]", 1490, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1490, 0), _114684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1490, 0), '$VAR'(_122144))
   Call: (270) [system] atom('$COMMENT'(";;    #[test]", 1490, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1490, 0), _114684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1490, 0), _114684)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1490, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1490, 0), _114684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1490, 0), _114684)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1490, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1490, 0), _114684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1490, 0), _114684)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1490, 0)==[_131424, _131430]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1490, 0), _114684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1490, 0), _114684)
   Call: (270) [system] is_list('$COMMENT'(";;    #[test]", 1490, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1490, 0), _114684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1490, 0), _114684)
   Call: (270) [system] string('$COMMENT'(";;    #[test]", 1490, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1490, 0), _114684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1490, 0), _114684)
   Call: (270) [system] compound('$COMMENT'(";;    #[test]", 1490, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    #[test]", 1490, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1490, 0), _141626, _141628)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT', [";;    #[test]", 1490, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    #[test]", 1490, 0], _145368)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1490, 0], _145368)
   Call: (271) [apply] apply:maplist_([";;    #[test]", 1490, 0], _145368, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    #[test]", 1490, 0], [_148186|_148188], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    #[test]", _148186)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _148186)
   Call: (273) [system] var(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _148186)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", '$VAR'(_152832))
   Call: (273) [system] atom(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _148186)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _148186)
   Call: (273) [system] ";;    #[test]"==true
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _148186)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _148186)
   Call: (273) [system] ";;    #[test]"==false
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _148186)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _148186)
   Call: (273) [system] ";;    #[test]"==[_162112, _162118]
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _148186)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _148186)
   Call: (273) [system] is_list(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _148186)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _148186)
   Call: (273) [system] string(";;    #[test]")
   Exit: (273) [system] string(";;    #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _148186)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _148186)
   Call: (273) [system] compound(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _148186)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _148186)
^  Call: (273) [user] symbol(";;    #[test]")
^  Unify: (273) [user] symbol(";;    #[test]")
   Call: (274) [system] atom(";;    #[test]")
   Fail: (274) [system] atom(";;    #[test]")
^  Fail: (273) [user] symbol(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _148186)
   Call: (273) [system] ";;    #[test]"=_148186
   Exit: (273) [system] ";;    #[test]"=";;    #[test]"
^  Exit: (272) [user] mfix_vars1(";;    #[test]", ";;    #[test]")
   Call: (272) [apply] apply:maplist_([1490, 0], _148188, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1490, 0], [_186184|_186186], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1490, _186184)
^  Unify: (273) [user] mfix_vars1(1490, _186184)
   Call: (274) [system] var(1490)
^  Redo: (273) [user] mfix_vars1(1490, _186184)
^  Unify: (273) [user] mfix_vars1(1490, '$VAR'(_190830))
   Call: (274) [system] atom(1490)
^  Redo: (273) [user] mfix_vars1(1490, _186184)
^  Unify: (273) [user] mfix_vars1(1490, _186184)
   Call: (274) [system] 1490==true
^  Redo: (273) [user] mfix_vars1(1490, _186184)
^  Unify: (273) [user] mfix_vars1(1490, _186184)
   Call: (274) [system] 1490==false
^  Redo: (273) [user] mfix_vars1(1490, _186184)
^  Unify: (273) [user] mfix_vars1(1490, _186184)
   Call: (274) [system] 1490==[_200110, _200116]
^  Redo: (273) [user] mfix_vars1(1490, _186184)
^  Unify: (273) [user] mfix_vars1(1490, _186184)
   Call: (274) [system] is_list(1490)
^  Redo: (273) [user] mfix_vars1(1490, _186184)
^  Unify: (273) [user] mfix_vars1(1490, _186184)
   Call: (274) [system] string(1490)
^  Redo: (273) [user] mfix_vars1(1490, _186184)
^  Unify: (273) [user] mfix_vars1(1490, _186184)
   Call: (274) [system] compound(1490)
^  Redo: (273) [user] mfix_vars1(1490, _186184)
^  Unify: (273) [user] mfix_vars1(1490, _186184)
^  Call: (274) [user] symbol(1490)
^  Unify: (274) [user] symbol(1490)
   Call: (275) [system] atom(1490)
   Fail: (275) [system] atom(1490)
^  Fail: (274) [user] symbol(1490)
^  Redo: (273) [user] mfix_vars1(1490, _186184)
   Call: (274) [system] 1490=_186184
   Exit: (274) [system] 1490=1490
^  Exit: (273) [user] mfix_vars1(1490, 1490)
   Call: (273) [apply] apply:maplist_([0], _186186, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_220510|_220512], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _220510)
^  Unify: (274) [user] mfix_vars1(0, _220510)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _220510)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_225156))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _220510)
^  Unify: (274) [user] mfix_vars1(0, _220510)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _220510)
^  Unify: (274) [user] mfix_vars1(0, _220510)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _220510)
^  Unify: (274) [user] mfix_vars1(0, _220510)
   Call: (275) [system] 0==[_234436, _234442]
^  Redo: (274) [user] mfix_vars1(0, _220510)
^  Unify: (274) [user] mfix_vars1(0, _220510)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _220510)
^  Unify: (274) [user] mfix_vars1(0, _220510)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _220510)
^  Unify: (274) [user] mfix_vars1(0, _220510)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _220510)
^  Unify: (274) [user] mfix_vars1(0, _220510)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _220510)
   Call: (275) [system] 0=_220510
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _220512, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1490, 0], [1490, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    #[test]", 1490, 0], [";;    #[test]", 1490, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1490, 0], [";;    #[test]", 1490, 0])
   Call: (270) [system] compound_name_arguments(_114684, '$COMMENT', [";;    #[test]", 1490, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT', [";;    #[test]", 1490, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1490, 0)\=@='$COMMENT'(";;    #[test]", 1490, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1490, 0), _109098)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    #[test]", 1490, 0), _270684))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1490, 0), _270684))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1490, 0), _270684))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1490, 0), _270684))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1490, 0), _270684)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1490, 0), _270684)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    #[test]", 1490, 0), _276270))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1490, 0), _276270))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    #[test]", 1490, 0), _276270)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1490, 0), _276270)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1490, 0), _276270)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1490, 0)\=@='$COMMENT'(";;    #[test]", 1490, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1490, 0), _270684)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    #[test]", 1490, 0), _103486))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1490, 0), _103486))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1490, 0), _103486))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1490, 0), _103486))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1490, 0), _103486)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1490, 0), _103486)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    #[test]", 1490, 0), _298590))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1490, 0), _298590))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    #[test]", 1490, 0), _298590)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1490, 0), _298590)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1490, 0), _298590)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1490, 0)\=@='$COMMENT'(";;    #[test]", 1490, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1490, 0), _103486)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0)))
   Call: (261) [system] '$COMMENT'(";;    #[test]", 1490, 0)\=@='$COMMENT'(";;    #[test]", 1490, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1490, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1490, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1490, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1490, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1490, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1490, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1490, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1490, 0), _327368, [], _327370)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    #[test]", 1490, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1490, 0), _327368, [], _327370)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1490, 0), _327368, [], _327370)
   Call: (258) [system] atom('$COMMENT'(";;    #[test]", 1490, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1490, 0), _327368, [], _327370)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1490, 0), _327368, [], _327370)
   Call: (258) [system] compound('$COMMENT'(";;    #[test]", 1490, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    #[test]", 1490, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1490, 0), _336684, _336686)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT', [";;    #[test]", 1490, 0])
^  Call: (258) [user] subst_vars([";;    #[test]", 1490, 0], _338570, [], _327370)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1490, 0], [";;    #[test]", 1490, 0], [], [])
   Call: (259) [system] var([";;    #[test]", 1490, 0])
^  Redo: (258) [user] subst_vars([";;    #[test]", 1490, 0], _338570, [], _327370)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1490, 0], [_342306|_342308], [], _327370)
^  Call: (259) [user] subst_vars(";;    #[test]", _342306, [], _343246)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
   Call: (260) [system] var(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _342306, [], _343246)
^  Unify: (259) [user] subst_vars(";;    #[test]", _342306, [], _343246)
   Call: (260) [system] atom(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _342306, [], _343246)
^  Unify: (259) [user] subst_vars(";;    #[test]", _342306, [], _343246)
   Call: (260) [system] compound(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _342306, [], _343246)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Exit: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Call: (259) [user] subst_vars([1490, 0], _342308, [], _327370)
^  Unify: (259) [user] subst_vars([1490, 0], [1490, 0], [], [])
   Call: (260) [system] var([1490, 0])
^  Redo: (259) [user] subst_vars([1490, 0], _342308, [], _327370)
^  Unify: (259) [user] subst_vars([1490, 0], [_358178|_358180], [], _327370)
^  Call: (260) [user] subst_vars(1490, _358178, [], _359118)
^  Unify: (260) [user] subst_vars(1490, 1490, [], [])
   Call: (261) [system] var(1490)
^  Redo: (260) [user] subst_vars(1490, _358178, [], _359118)
^  Unify: (260) [user] subst_vars(1490, _358178, [], _359118)
   Call: (261) [system] atom(1490)
^  Redo: (260) [user] subst_vars(1490, _358178, [], _359118)
^  Unify: (260) [user] subst_vars(1490, _358178, [], _359118)
   Call: (261) [system] compound(1490)
^  Redo: (260) [user] subst_vars(1490, _358178, [], _359118)
^  Unify: (260) [user] subst_vars(1490, 1490, [], [])
^  Exit: (260) [user] subst_vars(1490, 1490, [], [])
^  Call: (260) [user] subst_vars([0], _358180, [], _327370)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _358180, [], _327370)
^  Unify: (260) [user] subst_vars([0], [_374050|_374052], [], _327370)
^  Call: (261) [user] subst_vars(0, _374050, [], _374990)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _374050, [], _374990)
^  Unify: (261) [user] subst_vars(0, _374050, [], _374990)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _374050, [], _374990)
^  Unify: (261) [user] subst_vars(0, _374050, [], _374990)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _374050, [], _374990)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _374052, [], _327370)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _374052, [], _327370)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1490, 0], [1490, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    #[test]", 1490, 0], [";;    #[test]", 1490, 0], [], [])
   Call: (258) [system] compound_name_arguments(_327368, '$COMMENT', [";;    #[test]", 1490, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT', [";;    #[test]", 1490, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1490, 0), '$COMMENT'(";;    #[test]", 1490, 0), [], [])
   Call: (257) [system] _397408=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1490, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1490, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1490, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1490, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1490, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1490, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1490, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1490, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1490, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1491, 0, 53509, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$stream_position'(53509, 1491, 0, 53543)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _450130))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _450130))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _450130)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _450130)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _450130)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _450130)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _455742))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _455742))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _455742))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _455742))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _455742)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _455742)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _461328))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _461328))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _461328)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _461328)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _461328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _461328)
   Call: (270) [system] var('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _461328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$VAR'(_468788))
   Call: (270) [system] atom('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _461328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _461328)
   Call: (270) [system] '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _461328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _461328)
   Call: (270) [system] '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _461328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _461328)
   Call: (270) [system] '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0)==[_478068, _478074]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _461328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _461328)
   Call: (270) [system] is_list('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _461328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _461328)
   Call: (270) [system] string('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _461328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _461328)
   Call: (270) [system] compound('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _488270, _488272)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT', [";;    fn sealed_op_execute() {", 1491, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    fn sealed_op_execute() {", 1491, 0], _492012)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn sealed_op_execute() {", 1491, 0], _492012)
   Call: (271) [apply] apply:maplist_([";;    fn sealed_op_execute() {", 1491, 0], _492012, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    fn sealed_op_execute() {", 1491, 0], [_494830|_494832], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    fn sealed_op_execute() {", _494830)
^  Unify: (272) [user] mfix_vars1(";;    fn sealed_op_execute() {", _494830)
   Call: (273) [system] var(";;    fn sealed_op_execute() {")
^  Redo: (272) [user] mfix_vars1(";;    fn sealed_op_execute() {", _494830)
^  Unify: (272) [user] mfix_vars1(";;    fn sealed_op_execute() {", '$VAR'(_499476))
   Call: (273) [system] atom(";;    fn sealed_op_execute() {")
^  Redo: (272) [user] mfix_vars1(";;    fn sealed_op_execute() {", _494830)
^  Unify: (272) [user] mfix_vars1(";;    fn sealed_op_execute() {", _494830)
   Call: (273) [system] ";;    fn sealed_op_execute() {"==true
^  Redo: (272) [user] mfix_vars1(";;    fn sealed_op_execute() {", _494830)
^  Unify: (272) [user] mfix_vars1(";;    fn sealed_op_execute() {", _494830)
   Call: (273) [system] ";;    fn sealed_op_execute() {"==false
^  Redo: (272) [user] mfix_vars1(";;    fn sealed_op_execute() {", _494830)
^  Unify: (272) [user] mfix_vars1(";;    fn sealed_op_execute() {", _494830)
   Call: (273) [system] ";;    fn sealed_op_execute() {"==[_508756, _508762]
^  Redo: (272) [user] mfix_vars1(";;    fn sealed_op_execute() {", _494830)
^  Unify: (272) [user] mfix_vars1(";;    fn sealed_op_execute() {", _494830)
   Call: (273) [system] is_list(";;    fn sealed_op_execute() {")
^  Redo: (272) [user] mfix_vars1(";;    fn sealed_op_execute() {", _494830)
^  Unify: (272) [user] mfix_vars1(";;    fn sealed_op_execute() {", _494830)
   Call: (273) [system] string(";;    fn sealed_op_execute() {")
   Exit: (273) [system] string(";;    fn sealed_op_execute() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    fn sealed_op_execute() {", _494830)
^  Unify: (272) [user] mfix_vars1(";;    fn sealed_op_execute() {", _494830)
   Call: (273) [system] compound(";;    fn sealed_op_execute() {")
^  Redo: (272) [user] mfix_vars1(";;    fn sealed_op_execute() {", _494830)
^  Unify: (272) [user] mfix_vars1(";;    fn sealed_op_execute() {", _494830)
^  Call: (273) [user] symbol(";;    fn sealed_op_execute() {")
^  Unify: (273) [user] symbol(";;    fn sealed_op_execute() {")
   Call: (274) [system] atom(";;    fn sealed_op_execute() {")
   Fail: (274) [system] atom(";;    fn sealed_op_execute() {")
^  Fail: (273) [user] symbol(";;    fn sealed_op_execute() {")
^  Redo: (272) [user] mfix_vars1(";;    fn sealed_op_execute() {", _6028)
   Call: (273) [system] ";;    fn sealed_op_execute() {"=_6028
   Exit: (273) [system] ";;    fn sealed_op_execute() {"=";;    fn sealed_op_execute() {"
^  Exit: (272) [user] mfix_vars1(";;    fn sealed_op_execute() {", ";;    fn sealed_op_execute() {")
   Call: (272) [apply] apply:maplist_([1491, 0], _6030, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1491, 0], [_14952|_14954], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1491, _14952)
^  Unify: (273) [user] mfix_vars1(1491, _14952)
   Call: (274) [system] var(1491)
^  Redo: (273) [user] mfix_vars1(1491, _14952)
^  Unify: (273) [user] mfix_vars1(1491, '$VAR'(_19598))
   Call: (274) [system] atom(1491)
^  Redo: (273) [user] mfix_vars1(1491, _14952)
^  Unify: (273) [user] mfix_vars1(1491, _14952)
   Call: (274) [system] 1491==true
^  Redo: (273) [user] mfix_vars1(1491, _14952)
^  Unify: (273) [user] mfix_vars1(1491, _14952)
   Call: (274) [system] 1491==false
^  Redo: (273) [user] mfix_vars1(1491, _14952)
^  Unify: (273) [user] mfix_vars1(1491, _14952)
   Call: (274) [system] 1491==[_28878, _28884]
^  Redo: (273) [user] mfix_vars1(1491, _14952)
^  Unify: (273) [user] mfix_vars1(1491, _14952)
   Call: (274) [system] is_list(1491)
^  Redo: (273) [user] mfix_vars1(1491, _14952)
^  Unify: (273) [user] mfix_vars1(1491, _14952)
   Call: (274) [system] string(1491)
^  Redo: (273) [user] mfix_vars1(1491, _14952)
^  Unify: (273) [user] mfix_vars1(1491, _14952)
   Call: (274) [system] compound(1491)
^  Redo: (273) [user] mfix_vars1(1491, _14952)
^  Unify: (273) [user] mfix_vars1(1491, _14952)
^  Call: (274) [user] symbol(1491)
^  Unify: (274) [user] symbol(1491)
   Call: (275) [system] atom(1491)
   Fail: (275) [system] atom(1491)
^  Fail: (274) [user] symbol(1491)
^  Redo: (273) [user] mfix_vars1(1491, _14952)
   Call: (274) [system] 1491=_14952
   Exit: (274) [system] 1491=1491
^  Exit: (273) [user] mfix_vars1(1491, 1491)
   Call: (273) [apply] apply:maplist_([0], _14954, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_49278|_49280], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _49278)
^  Unify: (274) [user] mfix_vars1(0, _49278)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _49278)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_53924))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _49278)
^  Unify: (274) [user] mfix_vars1(0, _49278)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _49278)
^  Unify: (274) [user] mfix_vars1(0, _49278)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _49278)
^  Unify: (274) [user] mfix_vars1(0, _49278)
   Call: (275) [system] 0==[_63204, _63210]
^  Redo: (274) [user] mfix_vars1(0, _49278)
^  Unify: (274) [user] mfix_vars1(0, _49278)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _49278)
^  Unify: (274) [user] mfix_vars1(0, _49278)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _49278)
^  Unify: (274) [user] mfix_vars1(0, _49278)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _49278)
^  Unify: (274) [user] mfix_vars1(0, _49278)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _49278)
   Call: (275) [system] 0=_49278
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _49280, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1491, 0], [1491, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    fn sealed_op_execute() {", 1491, 0], [";;    fn sealed_op_execute() {", 1491, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn sealed_op_execute() {", 1491, 0], [";;    fn sealed_op_execute() {", 1491, 0])
   Call: (270) [system] compound_name_arguments(_5982, '$COMMENT', [";;    fn sealed_op_execute() {", 1491, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT', [";;    fn sealed_op_execute() {", 1491, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0)\=@='$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _5968)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _99452))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _99452))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _99452))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _99452))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _99452)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _99452)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _105038))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _105038))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _105038)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _105038)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _105038)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0)\=@='$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _99452)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _5948))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _5948))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _5948))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _5948))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _5948)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _127358))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _127358))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _127358)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _127358)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _127358)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0)\=@='$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0)))
   Call: (261) [system] '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0)\=@='$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _156136, [], _156138)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _156136, [], _156138)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _156136, [], _156138)
   Call: (258) [system] atom('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _156136, [], _156138)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _156136, [], _156138)
   Call: (258) [system] compound('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), _165452, _165454)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT', [";;    fn sealed_op_execute() {", 1491, 0])
^  Call: (258) [user] subst_vars([";;    fn sealed_op_execute() {", 1491, 0], _167338, [], _156138)
^  Unify: (258) [user] subst_vars([";;    fn sealed_op_execute() {", 1491, 0], [";;    fn sealed_op_execute() {", 1491, 0], [], [])
   Call: (259) [system] var([";;    fn sealed_op_execute() {", 1491, 0])
^  Redo: (258) [user] subst_vars([";;    fn sealed_op_execute() {", 1491, 0], _167338, [], _156138)
^  Unify: (258) [user] subst_vars([";;    fn sealed_op_execute() {", 1491, 0], [_171074|_171076], [], _156138)
^  Call: (259) [user] subst_vars(";;    fn sealed_op_execute() {", _171074, [], _172014)
^  Unify: (259) [user] subst_vars(";;    fn sealed_op_execute() {", ";;    fn sealed_op_execute() {", [], [])
   Call: (260) [system] var(";;    fn sealed_op_execute() {")
^  Redo: (259) [user] subst_vars(";;    fn sealed_op_execute() {", _171074, [], _172014)
^  Unify: (259) [user] subst_vars(";;    fn sealed_op_execute() {", _171074, [], _172014)
   Call: (260) [system] atom(";;    fn sealed_op_execute() {")
^  Redo: (259) [user] subst_vars(";;    fn sealed_op_execute() {", _171074, [], _172014)
^  Unify: (259) [user] subst_vars(";;    fn sealed_op_execute() {", _171074, [], _172014)
   Call: (260) [system] compound(";;    fn sealed_op_execute() {")
^  Redo: (259) [user] subst_vars(";;    fn sealed_op_execute() {", _171074, [], _172014)
^  Unify: (259) [user] subst_vars(";;    fn sealed_op_execute() {", ";;    fn sealed_op_execute() {", [], [])
^  Exit: (259) [user] subst_vars(";;    fn sealed_op_execute() {", ";;    fn sealed_op_execute() {", [], [])
^  Call: (259) [user] subst_vars([1491, 0], _171076, [], _156138)
^  Unify: (259) [user] subst_vars([1491, 0], [1491, 0], [], [])
   Call: (260) [system] var([1491, 0])
^  Redo: (259) [user] subst_vars([1491, 0], _171076, [], _156138)
^  Unify: (259) [user] subst_vars([1491, 0], [_186946|_186948], [], _156138)
^  Call: (260) [user] subst_vars(1491, _186946, [], _187886)
^  Unify: (260) [user] subst_vars(1491, 1491, [], [])
   Call: (261) [system] var(1491)
^  Redo: (260) [user] subst_vars(1491, _186946, [], _187886)
^  Unify: (260) [user] subst_vars(1491, _186946, [], _187886)
   Call: (261) [system] atom(1491)
^  Redo: (260) [user] subst_vars(1491, _186946, [], _187886)
^  Unify: (260) [user] subst_vars(1491, _186946, [], _187886)
   Call: (261) [system] compound(1491)
^  Redo: (260) [user] subst_vars(1491, _186946, [], _187886)
^  Unify: (260) [user] subst_vars(1491, 1491, [], [])
^  Exit: (260) [user] subst_vars(1491, 1491, [], [])
^  Call: (260) [user] subst_vars([0], _186948, [], _156138)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _186948, [], _156138)
^  Unify: (260) [user] subst_vars([0], [_202818|_202820], [], _156138)
^  Call: (261) [user] subst_vars(0, _202818, [], _203758)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _202818, [], _203758)
^  Unify: (261) [user] subst_vars(0, _202818, [], _203758)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _202818, [], _203758)
^  Unify: (261) [user] subst_vars(0, _202818, [], _203758)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _202818, [], _203758)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _202820, [], _156138)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _202820, [], _156138)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1491, 0], [1491, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    fn sealed_op_execute() {", 1491, 0], [";;    fn sealed_op_execute() {", 1491, 0], [], [])
   Call: (258) [system] compound_name_arguments(_156136, '$COMMENT', [";;    fn sealed_op_execute() {", 1491, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT', [";;    fn sealed_op_execute() {", 1491, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), [], [])
   Call: (257) [system] _226176=metta_file_buffer(+, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn sealed_op_execute() {", 1491, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1492, 0, 53540, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$stream_position'(53540, 1492, 0, 53574)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _278912))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _278912))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _278912)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _278912)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _278912)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _278912)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _284524))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _284524))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _284524))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _284524))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _284524)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _284524)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _290110))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _290110))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _290110)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _290110)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _290110)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _290110)
   Call: (270) [system] var('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _290110)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$VAR'(_297570))
   Call: (270) [system] atom('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _290110)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _290110)
   Call: (270) [system] '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _290110)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _290110)
   Call: (270) [system] '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _290110)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _290110)
   Call: (270) [system] '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0)==[_306850, _306856]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _290110)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _290110)
   Call: (270) [system] is_list('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _290110)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _290110)
   Call: (270) [system] string('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _290110)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _290110)
   Call: (270) [system] compound('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _317052, _317054)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT', [";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0], _320794)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0], _320794)
   Call: (271) [apply] apply:maplist_([";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0], _320794, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0], [_323612|_323614], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _323612)
^  Unify: (272) [user] mfix_vars1(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _323612)
   Call: (273) [system] var(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);")
^  Redo: (272) [user] mfix_vars1(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _323612)
^  Unify: (272) [user] mfix_vars1(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", '$VAR'(_328258))
   Call: (273) [system] atom(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);")
^  Redo: (272) [user] mfix_vars1(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _323612)
^  Unify: (272) [user] mfix_vars1(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _323612)
   Call: (273) [system] ";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);"==true
^  Redo: (272) [user] mfix_vars1(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _323612)
^  Unify: (272) [user] mfix_vars1(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _323612)
   Call: (273) [system] ";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);"==false
^  Redo: (272) [user] mfix_vars1(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _323612)
^  Unify: (272) [user] mfix_vars1(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _323612)
   Call: (273) [system] ";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);"==[_337538, _337544]
^  Redo: (272) [user] mfix_vars1(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _323612)
^  Unify: (272) [user] mfix_vars1(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _323612)
   Call: (273) [system] is_list(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);")
^  Redo: (272) [user] mfix_vars1(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _323612)
^  Unify: (272) [user] mfix_vars1(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _323612)
   Call: (273) [system] string(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);")
   Exit: (273) [system] string(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _323612)
^  Unify: (272) [user] mfix_vars1(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _323612)
   Call: (273) [system] compound(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);")
^  Redo: (272) [user] mfix_vars1(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _323612)
^  Unify: (272) [user] mfix_vars1(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _323612)
^  Call: (273) [user] symbol(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);")
^  Unify: (273) [user] symbol(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);")
   Call: (274) [system] atom(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);")
   Fail: (274) [system] atom(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);")
^  Fail: (273) [user] symbol(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);")
^  Redo: (272) [user] mfix_vars1(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _323612)
   Call: (273) [system] ";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);"=_323612
   Exit: (273) [system] ";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);"=";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);"
^  Exit: (272) [user] mfix_vars1(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", ";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);")
   Call: (272) [apply] apply:maplist_([1492, 0], _323614, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1492, 0], [_361610|_361612], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1492, _361610)
^  Unify: (273) [user] mfix_vars1(1492, _361610)
   Call: (274) [system] var(1492)
^  Redo: (273) [user] mfix_vars1(1492, _361610)
^  Unify: (273) [user] mfix_vars1(1492, '$VAR'(_366256))
   Call: (274) [system] atom(1492)
^  Redo: (273) [user] mfix_vars1(1492, _361610)
^  Unify: (273) [user] mfix_vars1(1492, _361610)
   Call: (274) [system] 1492==true
^  Redo: (273) [user] mfix_vars1(1492, _361610)
^  Unify: (273) [user] mfix_vars1(1492, _361610)
   Call: (274) [system] 1492==false
^  Redo: (273) [user] mfix_vars1(1492, _361610)
^  Unify: (273) [user] mfix_vars1(1492, _361610)
   Call: (274) [system] 1492==[_375536, _375542]
^  Redo: (273) [user] mfix_vars1(1492, _361610)
^  Unify: (273) [user] mfix_vars1(1492, _361610)
   Call: (274) [system] is_list(1492)
^  Redo: (273) [user] mfix_vars1(1492, _361610)
^  Unify: (273) [user] mfix_vars1(1492, _361610)
   Call: (274) [system] string(1492)
^  Redo: (273) [user] mfix_vars1(1492, _361610)
^  Unify: (273) [user] mfix_vars1(1492, _361610)
   Call: (274) [system] compound(1492)
^  Redo: (273) [user] mfix_vars1(1492, _361610)
^  Unify: (273) [user] mfix_vars1(1492, _361610)
^  Call: (274) [user] symbol(1492)
^  Unify: (274) [user] symbol(1492)
   Call: (275) [system] atom(1492)
   Fail: (275) [system] atom(1492)
^  Fail: (274) [user] symbol(1492)
^  Redo: (273) [user] mfix_vars1(1492, _361610)
   Call: (274) [system] 1492=_361610
   Exit: (274) [system] 1492=1492
^  Exit: (273) [user] mfix_vars1(1492, 1492)
   Call: (273) [apply] apply:maplist_([0], _361612, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_395936|_395938], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _395936)
^  Unify: (274) [user] mfix_vars1(0, _395936)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _395936)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_400582))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _395936)
^  Unify: (274) [user] mfix_vars1(0, _395936)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _395936)
^  Unify: (274) [user] mfix_vars1(0, _395936)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _395936)
^  Unify: (274) [user] mfix_vars1(0, _395936)
   Call: (275) [system] 0==[_409862, _409868]
^  Redo: (274) [user] mfix_vars1(0, _395936)
^  Unify: (274) [user] mfix_vars1(0, _395936)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _395936)
^  Unify: (274) [user] mfix_vars1(0, _395936)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _395936)
^  Unify: (274) [user] mfix_vars1(0, _395936)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _395936)
^  Unify: (274) [user] mfix_vars1(0, _395936)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _395936)
   Call: (275) [system] 0=_395936
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _395938, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1492, 0], [1492, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0], [";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0], [";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0])
   Call: (270) [system] compound_name_arguments(_290110, '$COMMENT', [";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT', [";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0)))
   Call: (267) [system] '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0)\=@='$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _284524)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _446110))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _446110))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _446110))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _446110))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _446110)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _446110)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _451696))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _451696))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _451696)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _451696)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _451696)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0)))
   Call: (267) [system] '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0)\=@='$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _446110)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _278912))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _278912))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _278912))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _278912))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _278912)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _278912)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _474016))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _474016))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _474016)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _474016)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _474016)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0)))
   Call: (267) [system] '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0)\=@='$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _278912)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0)))
   Call: (261) [system] '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0)\=@='$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _502794, [], _502796)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _502794, [], _502796)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _502794, [], _502796)
   Call: (258) [system] atom('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _502794, [], _502796)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _502794, [], _502796)
   Call: (258) [system] compound('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), _512110, _512112)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT', [";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0])
^  Call: (258) [user] subst_vars([";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0], _513996, [], _502796)
^  Unify: (258) [user] subst_vars([";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0], [";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0], [], [])
   Call: (259) [system] var([";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0])
^  Redo: (258) [user] subst_vars([";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0], _513996, [], _502796)
^  Unify: (258) [user] subst_vars([";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0], [_517732|_517734], [], _502796)
^  Call: (259) [user] subst_vars(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _517732, [], _518672)
^  Unify: (259) [user] subst_vars(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", ";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", [], [])
   Call: (260) [system] var(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);")
^  Redo: (259) [user] subst_vars(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _517732, [], _518672)
^  Unify: (259) [user] subst_vars(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _517732, [], _518672)
   Call: (260) [system] atom(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);")
^  Redo: (259) [user] subst_vars(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _5986, [], _5990)
^  Unify: (259) [user] subst_vars(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _5986, [], _5990)
   Call: (260) [system] compound(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);")
^  Redo: (259) [user] subst_vars(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", _5986, [], _5990)
^  Unify: (259) [user] subst_vars(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", ";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", [], [])
^  Exit: (259) [user] subst_vars(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", ";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", [], [])
^  Call: (259) [user] subst_vars([1492, 0], _5988, [], _5958)
^  Unify: (259) [user] subst_vars([1492, 0], [1492, 0], [], [])
   Call: (260) [system] var([1492, 0])
^  Redo: (259) [user] subst_vars([1492, 0], _5988, [], _5958)
^  Unify: (259) [user] subst_vars([1492, 0], [_15680|_15682], [], _5958)
^  Call: (260) [user] subst_vars(1492, _15680, [], _16620)
^  Unify: (260) [user] subst_vars(1492, 1492, [], [])
   Call: (261) [system] var(1492)
^  Redo: (260) [user] subst_vars(1492, _15680, [], _16620)
^  Unify: (260) [user] subst_vars(1492, _15680, [], _16620)
   Call: (261) [system] atom(1492)
^  Redo: (260) [user] subst_vars(1492, _15680, [], _16620)
^  Unify: (260) [user] subst_vars(1492, _15680, [], _16620)
   Call: (261) [system] compound(1492)
^  Redo: (260) [user] subst_vars(1492, _15680, [], _16620)
^  Unify: (260) [user] subst_vars(1492, 1492, [], [])
^  Exit: (260) [user] subst_vars(1492, 1492, [], [])
^  Call: (260) [user] subst_vars([0], _15682, [], _5958)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _15682, [], _5958)
^  Unify: (260) [user] subst_vars([0], [_31552|_31554], [], _5958)
^  Call: (261) [user] subst_vars(0, _31552, [], _32492)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _31552, [], _32492)
^  Unify: (261) [user] subst_vars(0, _31552, [], _32492)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _31552, [], _32492)
^  Unify: (261) [user] subst_vars(0, _31552, [], _32492)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _31552, [], _32492)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _31554, [], _5958)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _31554, [], _5958)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1492, 0], [1492, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0], [";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5956, '$COMMENT', [";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT', [";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), [], [])
   Call: (257) [system] _54910=metta_file_buffer(+, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        let val = SealedOp{}.execute(&mut vec![expr!(x y), expr!(\"=\"(y z))]);", 1492, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1493, 0, 53620, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$stream_position'(53620, 1493, 0, 53654)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _107650))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _107650))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _107650)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _107650)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _107650)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _107650)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _113262))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _113262))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _113262))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _113262))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _113262)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _113262)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _118848))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _118848))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _118848)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _118848)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _118848)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _118848)
   Call: (270) [system] var('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _118848)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$VAR'(_126308))
   Call: (270) [system] atom('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _118848)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _118848)
   Call: (270) [system] '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _118848)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _118848)
   Call: (270) [system] '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _118848)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _118848)
   Call: (270) [system] '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0)==[_135588, _135594]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _118848)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _118848)
   Call: (270) [system] is_list('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _118848)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _118848)
   Call: (270) [system] string('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _118848)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _118848)
   Call: (270) [system] compound('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _145790, _145792)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT', [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0], _149532)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0], _149532)
   Call: (271) [apply] apply:maplist_([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0], _149532, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0], [_152350|_152352], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _152350)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _152350)
   Call: (273) [system] var(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));")
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _152350)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", '$VAR'(_156996))
   Call: (273) [system] atom(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));")
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _152350)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _152350)
   Call: (273) [system] ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));"==true
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _152350)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _152350)
   Call: (273) [system] ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));"==false
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _152350)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _152350)
   Call: (273) [system] ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));"==[_166276, _166282]
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _152350)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _152350)
   Call: (273) [system] is_list(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));")
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _152350)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _152350)
   Call: (273) [system] string(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));")
   Exit: (273) [system] string(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _152350)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _152350)
   Call: (273) [system] compound(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));")
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _152350)
^  Unify: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _152350)
^  Call: (273) [user] symbol(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));")
^  Unify: (273) [user] symbol(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));")
   Call: (274) [system] atom(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));")
   Fail: (274) [system] atom(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));")
^  Fail: (273) [user] symbol(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));")
^  Redo: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _152350)
   Call: (273) [system] ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));"=_152350
   Exit: (273) [system] ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));"=";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));"
^  Exit: (272) [user] mfix_vars1(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));")
   Call: (272) [apply] apply:maplist_([1493, 0], _152352, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1493, 0], [_190348|_190350], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1493, _190348)
^  Unify: (273) [user] mfix_vars1(1493, _190348)
   Call: (274) [system] var(1493)
^  Redo: (273) [user] mfix_vars1(1493, _190348)
^  Unify: (273) [user] mfix_vars1(1493, '$VAR'(_194994))
   Call: (274) [system] atom(1493)
^  Redo: (273) [user] mfix_vars1(1493, _190348)
^  Unify: (273) [user] mfix_vars1(1493, _190348)
   Call: (274) [system] 1493==true
^  Redo: (273) [user] mfix_vars1(1493, _190348)
^  Unify: (273) [user] mfix_vars1(1493, _190348)
   Call: (274) [system] 1493==false
^  Redo: (273) [user] mfix_vars1(1493, _190348)
^  Unify: (273) [user] mfix_vars1(1493, _190348)
   Call: (274) [system] 1493==[_204274, _204280]
^  Redo: (273) [user] mfix_vars1(1493, _190348)
^  Unify: (273) [user] mfix_vars1(1493, _190348)
   Call: (274) [system] is_list(1493)
^  Redo: (273) [user] mfix_vars1(1493, _190348)
^  Unify: (273) [user] mfix_vars1(1493, _190348)
   Call: (274) [system] string(1493)
^  Redo: (273) [user] mfix_vars1(1493, _190348)
^  Unify: (273) [user] mfix_vars1(1493, _190348)
   Call: (274) [system] compound(1493)
^  Redo: (273) [user] mfix_vars1(1493, _190348)
^  Unify: (273) [user] mfix_vars1(1493, _190348)
^  Call: (274) [user] symbol(1493)
^  Unify: (274) [user] symbol(1493)
   Call: (275) [system] atom(1493)
   Fail: (275) [system] atom(1493)
^  Fail: (274) [user] symbol(1493)
^  Redo: (273) [user] mfix_vars1(1493, _190348)
   Call: (274) [system] 1493=_190348
   Exit: (274) [system] 1493=1493
^  Exit: (273) [user] mfix_vars1(1493, 1493)
   Call: (273) [apply] apply:maplist_([0], _190350, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_224674|_224676], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _224674)
^  Unify: (274) [user] mfix_vars1(0, _224674)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _224674)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_229320))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _224674)
^  Unify: (274) [user] mfix_vars1(0, _224674)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _224674)
^  Unify: (274) [user] mfix_vars1(0, _224674)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _224674)
^  Unify: (274) [user] mfix_vars1(0, _224674)
   Call: (275) [system] 0==[_238600, _238606]
^  Redo: (274) [user] mfix_vars1(0, _224674)
^  Unify: (274) [user] mfix_vars1(0, _224674)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _224674)
^  Unify: (274) [user] mfix_vars1(0, _224674)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _224674)
^  Unify: (274) [user] mfix_vars1(0, _224674)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _224674)
^  Unify: (274) [user] mfix_vars1(0, _224674)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _224674)
   Call: (275) [system] 0=_224674
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _224676, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1493, 0], [1493, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0], [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0], [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0])
   Call: (270) [system] compound_name_arguments(_118848, '$COMMENT', [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT', [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0)\=@='$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _113262)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _274848))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _274848))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _274848))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _274848))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _274848)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _274848)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _280434))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _280434))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _280434)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _280434)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _280434)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0)\=@='$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _274848)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _107650))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _107650))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _107650))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _107650))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _107650)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _107650)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _302754))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _302754))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _302754)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _302754)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _302754)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0)\=@='$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _107650)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0)\=@='$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _331532, [], _331534)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _331532, [], _331534)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _331532, [], _331534)
   Call: (258) [system] atom('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _331532, [], _331534)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _331532, [], _331534)
   Call: (258) [system] compound('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), _340848, _340850)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT', [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0])
^  Call: (258) [user] subst_vars([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0], _342734, [], _331534)
^  Unify: (258) [user] subst_vars([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0], [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0], [], [])
   Call: (259) [system] var([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0])
^  Redo: (258) [user] subst_vars([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0], _342734, [], _331534)
^  Unify: (258) [user] subst_vars([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0], [_346470|_346472], [], _331534)
^  Call: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _346470, [], _347410)
^  Unify: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", [], [])
   Call: (260) [system] var(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));")
^  Redo: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _346470, [], _347410)
^  Unify: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _346470, [], _347410)
   Call: (260) [system] atom(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));")
^  Redo: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _346470, [], _347410)
^  Unify: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _346470, [], _347410)
   Call: (260) [system] compound(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));")
^  Redo: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", _346470, [], _347410)
^  Unify: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", [], [])
^  Exit: (259) [user] subst_vars(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", ";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", [], [])
^  Call: (259) [user] subst_vars([1493, 0], _346472, [], _331534)
^  Unify: (259) [user] subst_vars([1493, 0], [1493, 0], [], [])
   Call: (260) [system] var([1493, 0])
^  Redo: (259) [user] subst_vars([1493, 0], _346472, [], _331534)
^  Unify: (259) [user] subst_vars([1493, 0], [_362342|_362344], [], _331534)
^  Call: (260) [user] subst_vars(1493, _362342, [], _363282)
^  Unify: (260) [user] subst_vars(1493, 1493, [], [])
   Call: (261) [system] var(1493)
^  Redo: (260) [user] subst_vars(1493, _362342, [], _363282)
^  Unify: (260) [user] subst_vars(1493, _362342, [], _363282)
   Call: (261) [system] atom(1493)
^  Redo: (260) [user] subst_vars(1493, _362342, [], _363282)
^  Unify: (260) [user] subst_vars(1493, _362342, [], _363282)
   Call: (261) [system] compound(1493)
^  Redo: (260) [user] subst_vars(1493, _362342, [], _363282)
^  Unify: (260) [user] subst_vars(1493, 1493, [], [])
^  Exit: (260) [user] subst_vars(1493, 1493, [], [])
^  Call: (260) [user] subst_vars([0], _362344, [], _331534)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _362344, [], _331534)
^  Unify: (260) [user] subst_vars([0], [_378214|_378216], [], _331534)
^  Call: (261) [user] subst_vars(0, _378214, [], _379154)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _378214, [], _379154)
^  Unify: (261) [user] subst_vars(0, _378214, [], _379154)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _378214, [], _379154)
^  Unify: (261) [user] subst_vars(0, _378214, [], _379154)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _378214, [], _379154)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _378216, [], _331534)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _378216, [], _331534)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1493, 0], [1493, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0], [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0], [], [])
   Call: (258) [system] compound_name_arguments(_331532, '$COMMENT', [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT', [";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), [], [])
   Call: (257) [system] _401572=metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert!(crate::atom::matcher::atoms_are_equivalent(&val.unwrap()[0], &expr!(\"=\"(y z))));", 1493, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1494, 0, 53719, '$COMMENT'(";;    }", 1494, 0), '$stream_position'(53719, 1494, 0, 53753)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1494, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1494, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    }", 1494, 0), _454290))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1494, 0), _454290))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    }", 1494, 0), _454290)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1494, 0), _454290)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1494, 0), _454290)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1494, 0), _454290)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    }", 1494, 0), _459902))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1494, 0), _459902))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1494, 0), _459902))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1494, 0), _459902))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1494, 0), _459902)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1494, 0), _459902)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    }", 1494, 0), _465488))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1494, 0), _465488))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    }", 1494, 0), _465488)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1494, 0), _465488)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1494, 0), _465488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1494, 0), _465488)
   Call: (270) [system] var('$COMMENT'(";;    }", 1494, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1494, 0), _465488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1494, 0), '$VAR'(_472948))
   Call: (270) [system] atom('$COMMENT'(";;    }", 1494, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1494, 0), _465488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1494, 0), _465488)
   Call: (270) [system] '$COMMENT'(";;    }", 1494, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1494, 0), _465488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1494, 0), _465488)
   Call: (270) [system] '$COMMENT'(";;    }", 1494, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1494, 0), _465488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1494, 0), _465488)
   Call: (270) [system] '$COMMENT'(";;    }", 1494, 0)==[_482228, _482234]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1494, 0), _465488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1494, 0), _465488)
   Call: (270) [system] is_list('$COMMENT'(";;    }", 1494, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1494, 0), _465488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1494, 0), _465488)
   Call: (270) [system] string('$COMMENT'(";;    }", 1494, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1494, 0), _465488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1494, 0), _465488)
   Call: (270) [system] compound('$COMMENT'(";;    }", 1494, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    }", 1494, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1494, 0), _492430, _492432)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1494, 0), '$COMMENT', [";;    }", 1494, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    }", 1494, 0], _496172)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1494, 0], _496172)
   Call: (271) [apply] apply:maplist_([";;    }", 1494, 0], _496172, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    }", 1494, 0], [_498990|_498992], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    }", _498990)
^  Unify: (272) [user] mfix_vars1(";;    }", _498990)
   Call: (273) [system] var(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _498990)
^  Unify: (272) [user] mfix_vars1(";;    }", '$VAR'(_503636))
   Call: (273) [system] atom(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _498990)
^  Unify: (272) [user] mfix_vars1(";;    }", _498990)
   Call: (273) [system] ";;    }"==true
^  Redo: (272) [user] mfix_vars1(";;    }", _498990)
^  Unify: (272) [user] mfix_vars1(";;    }", _498990)
   Call: (273) [system] ";;    }"==false
^  Redo: (272) [user] mfix_vars1(";;    }", _498990)
^  Unify: (272) [user] mfix_vars1(";;    }", _498990)
   Call: (273) [system] ";;    }"==[_512916, _512922]
^  Redo: (272) [user] mfix_vars1(";;    }", _498990)
^  Unify: (272) [user] mfix_vars1(";;    }", _498990)
   Call: (273) [system] is_list(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _498990)
^  Unify: (272) [user] mfix_vars1(";;    }", _498990)
   Call: (273) [system] string(";;    }")
   Exit: (273) [system] string(";;    }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    }", _498990)
^  Unify: (272) [user] mfix_vars1(";;    }", _6024)
   Call: (273) [system] compound(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _6024)
^  Unify: (272) [user] mfix_vars1(";;    }", _6024)
^  Call: (273) [user] symbol(";;    }")
^  Unify: (273) [user] symbol(";;    }")
   Call: (274) [system] atom(";;    }")
   Fail: (274) [system] atom(";;    }")
^  Fail: (273) [user] symbol(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _6024)
   Call: (273) [system] ";;    }"=_6024
   Exit: (273) [system] ";;    }"=";;    }"
^  Exit: (272) [user] mfix_vars1(";;    }", ";;    }")
   Call: (272) [apply] apply:maplist_([1494, 0], _6026, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1494, 0], [_18950|_18952], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1494, _18950)
^  Unify: (273) [user] mfix_vars1(1494, _18950)
   Call: (274) [system] var(1494)
^  Redo: (273) [user] mfix_vars1(1494, _18950)
^  Unify: (273) [user] mfix_vars1(1494, '$VAR'(_23596))
   Call: (274) [system] atom(1494)
^  Redo: (273) [user] mfix_vars1(1494, _18950)
^  Unify: (273) [user] mfix_vars1(1494, _18950)
   Call: (274) [system] 1494==true
^  Redo: (273) [user] mfix_vars1(1494, _18950)
^  Unify: (273) [user] mfix_vars1(1494, _18950)
   Call: (274) [system] 1494==false
^  Redo: (273) [user] mfix_vars1(1494, _18950)
^  Unify: (273) [user] mfix_vars1(1494, _18950)
   Call: (274) [system] 1494==[_32876, _32882]
^  Redo: (273) [user] mfix_vars1(1494, _18950)
^  Unify: (273) [user] mfix_vars1(1494, _18950)
   Call: (274) [system] is_list(1494)
^  Redo: (273) [user] mfix_vars1(1494, _18950)
^  Unify: (273) [user] mfix_vars1(1494, _18950)
   Call: (274) [system] string(1494)
^  Redo: (273) [user] mfix_vars1(1494, _18950)
^  Unify: (273) [user] mfix_vars1(1494, _18950)
   Call: (274) [system] compound(1494)
^  Redo: (273) [user] mfix_vars1(1494, _18950)
^  Unify: (273) [user] mfix_vars1(1494, _18950)
^  Call: (274) [user] symbol(1494)
^  Unify: (274) [user] symbol(1494)
   Call: (275) [system] atom(1494)
   Fail: (275) [system] atom(1494)
^  Fail: (274) [user] symbol(1494)
^  Redo: (273) [user] mfix_vars1(1494, _18950)
   Call: (274) [system] 1494=_18950
   Exit: (274) [system] 1494=1494
^  Exit: (273) [user] mfix_vars1(1494, 1494)
   Call: (273) [apply] apply:maplist_([0], _18952, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_53276|_53278], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _53276)
^  Unify: (274) [user] mfix_vars1(0, _53276)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _53276)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_57922))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _53276)
^  Unify: (274) [user] mfix_vars1(0, _53276)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _53276)
^  Unify: (274) [user] mfix_vars1(0, _53276)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _53276)
^  Unify: (274) [user] mfix_vars1(0, _53276)
   Call: (275) [system] 0==[_67202, _67208]
^  Redo: (274) [user] mfix_vars1(0, _53276)
^  Unify: (274) [user] mfix_vars1(0, _53276)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _53276)
^  Unify: (274) [user] mfix_vars1(0, _53276)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _53276)
^  Unify: (274) [user] mfix_vars1(0, _53276)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _53276)
^  Unify: (274) [user] mfix_vars1(0, _53276)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _53276)
   Call: (275) [system] 0=_53276
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _53278, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1494, 0], [1494, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    }", 1494, 0], [";;    }", 1494, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1494, 0], [";;    }", 1494, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";;    }", 1494, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1494, 0), '$COMMENT', [";;    }", 1494, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1494, 0)\=@='$COMMENT'(";;    }", 1494, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1494, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    }", 1494, 0), _103450))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1494, 0), _103450))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1494, 0), _103450))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1494, 0), _103450))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1494, 0), _103450)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1494, 0), _103450)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    }", 1494, 0), _109036))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1494, 0), _109036))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    }", 1494, 0), _109036)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1494, 0), _109036)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    }", 1494, 0), _109036)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1494, 0)\=@='$COMMENT'(";;    }", 1494, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1494, 0), _103450)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    }", 1494, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1494, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1494, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1494, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1494, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1494, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    }", 1494, 0), _131356))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1494, 0), _131356))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    }", 1494, 0), _131356)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1494, 0), _131356)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    }", 1494, 0), _131356)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1494, 0)\=@='$COMMENT'(";;    }", 1494, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1494, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0)))
   Call: (261) [system] '$COMMENT'(";;    }", 1494, 0)\=@='$COMMENT'(";;    }", 1494, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1494, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1494, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1494, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1494, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1494, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    }", 1494, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    }", 1494, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    }", 1494, 0), _160134, [], _160136)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    }", 1494, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1494, 0), _160134, [], _160136)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1494, 0), _160134, [], _160136)
   Call: (258) [system] atom('$COMMENT'(";;    }", 1494, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1494, 0), _160134, [], _160136)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1494, 0), _160134, [], _160136)
   Call: (258) [system] compound('$COMMENT'(";;    }", 1494, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    }", 1494, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1494, 0), _169450, _169452)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1494, 0), '$COMMENT', [";;    }", 1494, 0])
^  Call: (258) [user] subst_vars([";;    }", 1494, 0], _171336, [], _160136)
^  Unify: (258) [user] subst_vars([";;    }", 1494, 0], [";;    }", 1494, 0], [], [])
   Call: (259) [system] var([";;    }", 1494, 0])
^  Redo: (258) [user] subst_vars([";;    }", 1494, 0], _171336, [], _160136)
^  Unify: (258) [user] subst_vars([";;    }", 1494, 0], [_175072|_175074], [], _160136)
^  Call: (259) [user] subst_vars(";;    }", _175072, [], _176012)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
   Call: (260) [system] var(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _175072, [], _176012)
^  Unify: (259) [user] subst_vars(";;    }", _175072, [], _176012)
   Call: (260) [system] atom(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _175072, [], _176012)
^  Unify: (259) [user] subst_vars(";;    }", _175072, [], _176012)
   Call: (260) [system] compound(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _175072, [], _176012)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Exit: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Call: (259) [user] subst_vars([1494, 0], _175074, [], _160136)
^  Unify: (259) [user] subst_vars([1494, 0], [1494, 0], [], [])
   Call: (260) [system] var([1494, 0])
^  Redo: (259) [user] subst_vars([1494, 0], _175074, [], _160136)
^  Unify: (259) [user] subst_vars([1494, 0], [_190944|_190946], [], _160136)
^  Call: (260) [user] subst_vars(1494, _190944, [], _191884)
^  Unify: (260) [user] subst_vars(1494, 1494, [], [])
   Call: (261) [system] var(1494)
^  Redo: (260) [user] subst_vars(1494, _190944, [], _191884)
^  Unify: (260) [user] subst_vars(1494, _190944, [], _191884)
   Call: (261) [system] atom(1494)
^  Redo: (260) [user] subst_vars(1494, _190944, [], _191884)
^  Unify: (260) [user] subst_vars(1494, _190944, [], _191884)
   Call: (261) [system] compound(1494)
^  Redo: (260) [user] subst_vars(1494, _190944, [], _191884)
^  Unify: (260) [user] subst_vars(1494, 1494, [], [])
^  Exit: (260) [user] subst_vars(1494, 1494, [], [])
^  Call: (260) [user] subst_vars([0], _190946, [], _160136)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _190946, [], _160136)
^  Unify: (260) [user] subst_vars([0], [_206816|_206818], [], _160136)
^  Call: (261) [user] subst_vars(0, _206816, [], _207756)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _206816, [], _207756)
^  Unify: (261) [user] subst_vars(0, _206816, [], _207756)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _206816, [], _207756)
^  Unify: (261) [user] subst_vars(0, _206816, [], _207756)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _206816, [], _207756)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _206818, [], _160136)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _206818, [], _160136)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1494, 0], [1494, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    }", 1494, 0], [";;    }", 1494, 0], [], [])
   Call: (258) [system] compound_name_arguments(_160134, '$COMMENT', [";;    }", 1494, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1494, 0), '$COMMENT', [";;    }", 1494, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    }", 1494, 0), '$COMMENT'(";;    }", 1494, 0), [], [])
   Call: (257) [system] _230174=metta_file_buffer(+, '$COMMENT'(";;    }", 1494, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    }", 1494, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    }", 1494, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1494, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1494, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1494, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1494, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1494, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1494, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1496, 0, 53728, '$COMMENT'(";; Converted:", 1496, 0), '$stream_position'(53728, 1496, 0, 53762)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1496, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1496, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1496, 0), _282892))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1496, 0), _282892))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1496, 0), _282892)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1496, 0), _282892)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1496, 0), _282892)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1496, 0), _282892)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1496, 0), _288504))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1496, 0), _288504))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1496, 0), _288504))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1496, 0), _288504))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1496, 0), _288504)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1496, 0), _288504)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1496, 0), _294090))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1496, 0), _294090))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1496, 0), _294090)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1496, 0), _294090)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1496, 0), _294090)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1496, 0), _294090)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1496, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1496, 0), _294090)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1496, 0), '$VAR'(_301550))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1496, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1496, 0), _294090)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1496, 0), _294090)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1496, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1496, 0), _294090)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1496, 0), _294090)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1496, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1496, 0), _294090)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1496, 0), _294090)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1496, 0)==[_310830, _310836]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1496, 0), _294090)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1496, 0), _294090)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1496, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1496, 0), _294090)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1496, 0), _294090)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1496, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1496, 0), _294090)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1496, 0), _294090)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1496, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1496, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1496, 0), _321032, _321034)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1496, 0), '$COMMENT', [";; Converted:", 1496, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1496, 0], _324774)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1496, 0], _324774)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1496, 0], _324774, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1496, 0], [_327592|_327594], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _327592)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _327592)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _327592)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_332238))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _327592)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _327592)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _327592)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _327592)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _327592)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _327592)
   Call: (273) [system] ";; Converted:"==[_341518, _341524]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _327592)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _327592)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _327592)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _327592)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _327592)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _327592)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _327592)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _327592)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _327592)
   Call: (273) [system] ";; Converted:"=_327592
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1496, 0], _327594, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1496, 0], [_365590|_365592], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1496, _365590)
^  Unify: (273) [user] mfix_vars1(1496, _365590)
   Call: (274) [system] var(1496)
^  Redo: (273) [user] mfix_vars1(1496, _365590)
^  Unify: (273) [user] mfix_vars1(1496, '$VAR'(_370236))
   Call: (274) [system] atom(1496)
^  Redo: (273) [user] mfix_vars1(1496, _365590)
^  Unify: (273) [user] mfix_vars1(1496, _365590)
   Call: (274) [system] 1496==true
^  Redo: (273) [user] mfix_vars1(1496, _365590)
^  Unify: (273) [user] mfix_vars1(1496, _365590)
   Call: (274) [system] 1496==false
^  Redo: (273) [user] mfix_vars1(1496, _365590)
^  Unify: (273) [user] mfix_vars1(1496, _365590)
   Call: (274) [system] 1496==[_379516, _379522]
^  Redo: (273) [user] mfix_vars1(1496, _365590)
^  Unify: (273) [user] mfix_vars1(1496, _365590)
   Call: (274) [system] is_list(1496)
^  Redo: (273) [user] mfix_vars1(1496, _365590)
^  Unify: (273) [user] mfix_vars1(1496, _365590)
   Call: (274) [system] string(1496)
^  Redo: (273) [user] mfix_vars1(1496, _365590)
^  Unify: (273) [user] mfix_vars1(1496, _365590)
   Call: (274) [system] compound(1496)
^  Redo: (273) [user] mfix_vars1(1496, _365590)
^  Unify: (273) [user] mfix_vars1(1496, _365590)
^  Call: (274) [user] symbol(1496)
^  Unify: (274) [user] symbol(1496)
   Call: (275) [system] atom(1496)
   Fail: (275) [system] atom(1496)
^  Fail: (274) [user] symbol(1496)
^  Redo: (273) [user] mfix_vars1(1496, _365590)
   Call: (274) [system] 1496=_365590
   Exit: (274) [system] 1496=1496
^  Exit: (273) [user] mfix_vars1(1496, 1496)
   Call: (273) [apply] apply:maplist_([0], _365592, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_399916|_399918], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _399916)
^  Unify: (274) [user] mfix_vars1(0, _399916)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _399916)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_404562))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _399916)
^  Unify: (274) [user] mfix_vars1(0, _399916)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _399916)
^  Unify: (274) [user] mfix_vars1(0, _399916)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _399916)
^  Unify: (274) [user] mfix_vars1(0, _399916)
   Call: (275) [system] 0==[_413842, _413848]
^  Redo: (274) [user] mfix_vars1(0, _399916)
^  Unify: (274) [user] mfix_vars1(0, _399916)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _399916)
^  Unify: (274) [user] mfix_vars1(0, _399916)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _399916)
^  Unify: (274) [user] mfix_vars1(0, _399916)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _399916)
^  Unify: (274) [user] mfix_vars1(0, _399916)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _399916)
   Call: (275) [system] 0=_399916
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _399918, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1496, 0], [1496, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1496, 0], [";; Converted:", 1496, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1496, 0], [";; Converted:", 1496, 0])
   Call: (270) [system] compound_name_arguments(_294090, '$COMMENT', [";; Converted:", 1496, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1496, 0), '$COMMENT', [";; Converted:", 1496, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1496, 0)\=@='$COMMENT'(";; Converted:", 1496, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1496, 0), _288504)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1496, 0), _450090))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1496, 0), _450090))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1496, 0), _450090))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1496, 0), _450090))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1496, 0), _450090)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1496, 0), _450090)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1496, 0), _455676))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1496, 0), _455676))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1496, 0), _455676)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1496, 0), _455676)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1496, 0), _455676)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1496, 0)\=@='$COMMENT'(";; Converted:", 1496, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1496, 0), _450090)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1496, 0), _282892))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1496, 0), _282892))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1496, 0), _282892))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1496, 0), _282892))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1496, 0), _282892)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1496, 0), _282892)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1496, 0), _477996))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1496, 0), _477996))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1496, 0), _477996)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1496, 0), _477996)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1496, 0), _477996)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1496, 0)\=@='$COMMENT'(";; Converted:", 1496, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1496, 0), _282892)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1496, 0)\=@='$COMMENT'(";; Converted:", 1496, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1496, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1496, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1496, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1496, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1496, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1496, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1496, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1496, 0), _506774, [], _506776)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1496, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1496, 0), _506774, [], _506776)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1496, 0), _506774, [], _506776)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1496, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1496, 0), _506774, [], _506776)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1496, 0), _506774, [], _506776)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1496, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1496, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1496, 0), _516090, _516092)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1496, 0), '$COMMENT', [";; Converted:", 1496, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1496, 0], _517976, [], _506776)
^  Unify: (258) [user] subst_vars([";; Converted:", 1496, 0], [";; Converted:", 1496, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1496, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1496, 0], _517976, [], _506776)
^  Unify: (258) [user] subst_vars([";; Converted:", 1496, 0], [_521712|_521714], [], _506776)
^  Call: (259) [user] subst_vars(";; Converted:", _521712, [], _522652)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _5968, [], _5972)
^  Unify: (259) [user] subst_vars(";; Converted:", _5968, [], _5972)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _5968, [], _5972)
^  Unify: (259) [user] subst_vars(";; Converted:", _5968, [], _5972)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _5968, [], _5972)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1496, 0], _5970, [], _5940)
^  Unify: (259) [user] subst_vars([1496, 0], [1496, 0], [], [])
   Call: (260) [system] var([1496, 0])
^  Redo: (259) [user] subst_vars([1496, 0], _5970, [], _5940)
^  Unify: (259) [user] subst_vars([1496, 0], [_19634|_19636], [], _5940)
^  Call: (260) [user] subst_vars(1496, _19634, [], _20574)
^  Unify: (260) [user] subst_vars(1496, 1496, [], [])
   Call: (261) [system] var(1496)
^  Redo: (260) [user] subst_vars(1496, _19634, [], _20574)
^  Unify: (260) [user] subst_vars(1496, _19634, [], _20574)
   Call: (261) [system] atom(1496)
^  Redo: (260) [user] subst_vars(1496, _19634, [], _20574)
^  Unify: (260) [user] subst_vars(1496, _19634, [], _20574)
   Call: (261) [system] compound(1496)
^  Redo: (260) [user] subst_vars(1496, _19634, [], _20574)
^  Unify: (260) [user] subst_vars(1496, 1496, [], [])
^  Exit: (260) [user] subst_vars(1496, 1496, [], [])
^  Call: (260) [user] subst_vars([0], _19636, [], _5940)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _19636, [], _5940)
^  Unify: (260) [user] subst_vars([0], [_35506|_35508], [], _5940)
^  Call: (261) [user] subst_vars(0, _35506, [], _36446)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _35506, [], _36446)
^  Unify: (261) [user] subst_vars(0, _35506, [], _36446)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _35506, [], _36446)
^  Unify: (261) [user] subst_vars(0, _35506, [], _36446)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _35506, [], _36446)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _35508, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _35508, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1496, 0], [1496, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1496, 0], [";; Converted:", 1496, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5938, '$COMMENT', [";; Converted:", 1496, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1496, 0), '$COMMENT', [";; Converted:", 1496, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1496, 0), '$COMMENT'(";; Converted:", 1496, 0), [], [])
   Call: (257) [system] _58864=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1496, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1496, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1496, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1496, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1496, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1496, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1496, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1496, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1496, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1499, 0, 53799, '$COMMENT'(";; Original:", 1499, 0), '$stream_position'(53799, 1499, 0, 53833)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1499, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1499, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1499, 0), _111582))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1499, 0), _111582))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1499, 0), _111582)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1499, 0), _111582)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1499, 0), _111582)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1499, 0), _111582)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1499, 0), _117194))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1499, 0), _117194))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1499, 0), _117194))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1499, 0), _117194))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1499, 0), _117194)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1499, 0), _117194)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1499, 0), _122780))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1499, 0), _122780))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1499, 0), _122780)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1499, 0), _122780)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1499, 0), _122780)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1499, 0), _122780)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1499, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1499, 0), _122780)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1499, 0), '$VAR'(_130240))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1499, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1499, 0), _122780)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1499, 0), _122780)
   Call: (270) [system] '$COMMENT'(";; Original:", 1499, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1499, 0), _122780)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1499, 0), _122780)
   Call: (270) [system] '$COMMENT'(";; Original:", 1499, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1499, 0), _122780)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1499, 0), _122780)
   Call: (270) [system] '$COMMENT'(";; Original:", 1499, 0)==[_139520, _139526]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1499, 0), _122780)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1499, 0), _122780)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1499, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1499, 0), _122780)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1499, 0), _122780)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1499, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1499, 0), _122780)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1499, 0), _122780)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1499, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1499, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1499, 0), _149722, _149724)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1499, 0), '$COMMENT', [";; Original:", 1499, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1499, 0], _153464)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1499, 0], _153464)
   Call: (271) [apply] apply:maplist_([";; Original:", 1499, 0], _153464, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1499, 0], [_156282|_156284], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _156282)
^  Unify: (272) [user] mfix_vars1(";; Original:", _156282)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _156282)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_160928))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _156282)
^  Unify: (272) [user] mfix_vars1(";; Original:", _156282)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _156282)
^  Unify: (272) [user] mfix_vars1(";; Original:", _156282)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _156282)
^  Unify: (272) [user] mfix_vars1(";; Original:", _156282)
   Call: (273) [system] ";; Original:"==[_170208, _170214]
^  Redo: (272) [user] mfix_vars1(";; Original:", _156282)
^  Unify: (272) [user] mfix_vars1(";; Original:", _156282)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _156282)
^  Unify: (272) [user] mfix_vars1(";; Original:", _156282)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _156282)
^  Unify: (272) [user] mfix_vars1(";; Original:", _156282)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _156282)
^  Unify: (272) [user] mfix_vars1(";; Original:", _156282)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _156282)
   Call: (273) [system] ";; Original:"=_156282
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1499, 0], _156284, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1499, 0], [_194280|_194282], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1499, _194280)
^  Unify: (273) [user] mfix_vars1(1499, _194280)
   Call: (274) [system] var(1499)
^  Redo: (273) [user] mfix_vars1(1499, _194280)
^  Unify: (273) [user] mfix_vars1(1499, '$VAR'(_198926))
   Call: (274) [system] atom(1499)
^  Redo: (273) [user] mfix_vars1(1499, _194280)
^  Unify: (273) [user] mfix_vars1(1499, _194280)
   Call: (274) [system] 1499==true
^  Redo: (273) [user] mfix_vars1(1499, _194280)
^  Unify: (273) [user] mfix_vars1(1499, _194280)
   Call: (274) [system] 1499==false
^  Redo: (273) [user] mfix_vars1(1499, _194280)
^  Unify: (273) [user] mfix_vars1(1499, _194280)
   Call: (274) [system] 1499==[_208206, _208212]
^  Redo: (273) [user] mfix_vars1(1499, _194280)
^  Unify: (273) [user] mfix_vars1(1499, _194280)
   Call: (274) [system] is_list(1499)
^  Redo: (273) [user] mfix_vars1(1499, _194280)
^  Unify: (273) [user] mfix_vars1(1499, _194280)
   Call: (274) [system] string(1499)
^  Redo: (273) [user] mfix_vars1(1499, _194280)
^  Unify: (273) [user] mfix_vars1(1499, _194280)
   Call: (274) [system] compound(1499)
^  Redo: (273) [user] mfix_vars1(1499, _194280)
^  Unify: (273) [user] mfix_vars1(1499, _194280)
^  Call: (274) [user] symbol(1499)
^  Unify: (274) [user] symbol(1499)
   Call: (275) [system] atom(1499)
   Fail: (275) [system] atom(1499)
^  Fail: (274) [user] symbol(1499)
^  Redo: (273) [user] mfix_vars1(1499, _194280)
   Call: (274) [system] 1499=_194280
   Exit: (274) [system] 1499=1499
^  Exit: (273) [user] mfix_vars1(1499, 1499)
   Call: (273) [apply] apply:maplist_([0], _194282, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_228606|_228608], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _228606)
^  Unify: (274) [user] mfix_vars1(0, _228606)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _228606)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_233252))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _228606)
^  Unify: (274) [user] mfix_vars1(0, _228606)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _228606)
^  Unify: (274) [user] mfix_vars1(0, _228606)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _228606)
^  Unify: (274) [user] mfix_vars1(0, _228606)
   Call: (275) [system] 0==[_242532, _242538]
^  Redo: (274) [user] mfix_vars1(0, _228606)
^  Unify: (274) [user] mfix_vars1(0, _228606)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _228606)
^  Unify: (274) [user] mfix_vars1(0, _228606)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _228606)
^  Unify: (274) [user] mfix_vars1(0, _228606)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _228606)
^  Unify: (274) [user] mfix_vars1(0, _228606)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _228606)
   Call: (275) [system] 0=_228606
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _228608, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1499, 0], [1499, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1499, 0], [";; Original:", 1499, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1499, 0], [";; Original:", 1499, 0])
   Call: (270) [system] compound_name_arguments(_122780, '$COMMENT', [";; Original:", 1499, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1499, 0), '$COMMENT', [";; Original:", 1499, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1499, 0)\=@='$COMMENT'(";; Original:", 1499, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1499, 0), _117194)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1499, 0), _278780))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1499, 0), _278780))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1499, 0), _278780))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1499, 0), _278780))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1499, 0), _278780)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1499, 0), _278780)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1499, 0), _284366))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1499, 0), _284366))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1499, 0), _284366)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1499, 0), _284366)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1499, 0), _284366)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1499, 0)\=@='$COMMENT'(";; Original:", 1499, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1499, 0), _278780)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1499, 0), _111582))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1499, 0), _111582))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1499, 0), _111582))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1499, 0), _111582))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1499, 0), _111582)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1499, 0), _111582)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1499, 0), _306686))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1499, 0), _306686))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1499, 0), _306686)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1499, 0), _306686)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1499, 0), _306686)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1499, 0)\=@='$COMMENT'(";; Original:", 1499, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1499, 0), _111582)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1499, 0)\=@='$COMMENT'(";; Original:", 1499, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1499, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1499, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1499, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1499, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1499, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1499, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1499, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1499, 0), _335464, [], _335466)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1499, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1499, 0), _335464, [], _335466)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1499, 0), _335464, [], _335466)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1499, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1499, 0), _335464, [], _335466)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1499, 0), _335464, [], _335466)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1499, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1499, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1499, 0), _344780, _344782)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1499, 0), '$COMMENT', [";; Original:", 1499, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1499, 0], _346666, [], _335466)
^  Unify: (258) [user] subst_vars([";; Original:", 1499, 0], [";; Original:", 1499, 0], [], [])
   Call: (259) [system] var([";; Original:", 1499, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1499, 0], _346666, [], _335466)
^  Unify: (258) [user] subst_vars([";; Original:", 1499, 0], [_350402|_350404], [], _335466)
^  Call: (259) [user] subst_vars(";; Original:", _350402, [], _351342)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _350402, [], _351342)
^  Unify: (259) [user] subst_vars(";; Original:", _350402, [], _351342)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _350402, [], _351342)
^  Unify: (259) [user] subst_vars(";; Original:", _350402, [], _351342)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _350402, [], _351342)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1499, 0], _350404, [], _335466)
^  Unify: (259) [user] subst_vars([1499, 0], [1499, 0], [], [])
   Call: (260) [system] var([1499, 0])
^  Redo: (259) [user] subst_vars([1499, 0], _350404, [], _335466)
^  Unify: (259) [user] subst_vars([1499, 0], [_366274|_366276], [], _335466)
^  Call: (260) [user] subst_vars(1499, _366274, [], _367214)
^  Unify: (260) [user] subst_vars(1499, 1499, [], [])
   Call: (261) [system] var(1499)
^  Redo: (260) [user] subst_vars(1499, _366274, [], _367214)
^  Unify: (260) [user] subst_vars(1499, _366274, [], _367214)
   Call: (261) [system] atom(1499)
^  Redo: (260) [user] subst_vars(1499, _366274, [], _367214)
^  Unify: (260) [user] subst_vars(1499, _366274, [], _367214)
   Call: (261) [system] compound(1499)
^  Redo: (260) [user] subst_vars(1499, _366274, [], _367214)
^  Unify: (260) [user] subst_vars(1499, 1499, [], [])
^  Exit: (260) [user] subst_vars(1499, 1499, [], [])
^  Call: (260) [user] subst_vars([0], _366276, [], _335466)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _366276, [], _335466)
^  Unify: (260) [user] subst_vars([0], [_382146|_382148], [], _335466)
^  Call: (261) [user] subst_vars(0, _382146, [], _383086)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _382146, [], _383086)
^  Unify: (261) [user] subst_vars(0, _382146, [], _383086)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _382146, [], _383086)
^  Unify: (261) [user] subst_vars(0, _382146, [], _383086)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _382146, [], _383086)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _382148, [], _335466)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _382148, [], _335466)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1499, 0], [1499, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1499, 0], [";; Original:", 1499, 0], [], [])
   Call: (258) [system] compound_name_arguments(_335464, '$COMMENT', [";; Original:", 1499, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1499, 0), '$COMMENT', [";; Original:", 1499, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1499, 0), '$COMMENT'(";; Original:", 1499, 0), [], [])
   Call: (257) [system] _405504=metta_file_buffer(+, '$COMMENT'(";; Original:", 1499, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1499, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1499, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1499, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1499, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1499, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1499, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1499, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1499, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1500, 0, 53812, '$COMMENT'(";;    #[test]", 1500, 0), '$stream_position'(53812, 1500, 0, 53846)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1500, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1500, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1500, 0), _458222))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1500, 0), _458222))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1500, 0), _458222)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1500, 0), _458222)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1500, 0), _458222)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1500, 0), _458222)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1500, 0), _463834))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1500, 0), _463834))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1500, 0), _463834))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1500, 0), _463834))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1500, 0), _463834)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1500, 0), _463834)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    #[test]", 1500, 0), _469420))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1500, 0), _469420))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    #[test]", 1500, 0), _469420)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1500, 0), _469420)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1500, 0), _469420)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1500, 0), _469420)
   Call: (270) [system] var('$COMMENT'(";;    #[test]", 1500, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1500, 0), _469420)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1500, 0), '$VAR'(_476880))
   Call: (270) [system] atom('$COMMENT'(";;    #[test]", 1500, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1500, 0), _469420)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1500, 0), _469420)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1500, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1500, 0), _469420)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1500, 0), _469420)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1500, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1500, 0), _469420)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1500, 0), _469420)
   Call: (270) [system] '$COMMENT'(";;    #[test]", 1500, 0)==[_486160, _486166]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1500, 0), _469420)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1500, 0), _469420)
   Call: (270) [system] is_list('$COMMENT'(";;    #[test]", 1500, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1500, 0), _469420)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1500, 0), _469420)
   Call: (270) [system] string('$COMMENT'(";;    #[test]", 1500, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1500, 0), _469420)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1500, 0), _469420)
   Call: (270) [system] compound('$COMMENT'(";;    #[test]", 1500, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    #[test]", 1500, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1500, 0), _496362, _496364)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT', [";;    #[test]", 1500, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    #[test]", 1500, 0], _500104)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1500, 0], _500104)
   Call: (271) [apply] apply:maplist_([";;    #[test]", 1500, 0], _500104, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    #[test]", 1500, 0], [_502922|_502924], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    #[test]", _502922)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _502922)
   Call: (273) [system] var(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _502922)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", '$VAR'(_507568))
   Call: (273) [system] atom(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _502922)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _502922)
   Call: (273) [system] ";;    #[test]"==true
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _502922)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _502922)
   Call: (273) [system] ";;    #[test]"==false
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _502922)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _502922)
   Call: (273) [system] ";;    #[test]"==[_516848, _516854]
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _502922)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _502922)
   Call: (273) [system] is_list(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _502922)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _502922)
   Call: (273) [system] string(";;    #[test]")
   Exit: (273) [system] string(";;    #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _6024)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _6024)
   Call: (273) [system] compound(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _6024)
^  Unify: (272) [user] mfix_vars1(";;    #[test]", _6024)
^  Call: (273) [user] symbol(";;    #[test]")
^  Unify: (273) [user] symbol(";;    #[test]")
   Call: (274) [system] atom(";;    #[test]")
   Fail: (274) [system] atom(";;    #[test]")
^  Fail: (273) [user] symbol(";;    #[test]")
^  Redo: (272) [user] mfix_vars1(";;    #[test]", _6024)
   Call: (273) [system] ";;    #[test]"=_6024
   Exit: (273) [system] ";;    #[test]"=";;    #[test]"
^  Exit: (272) [user] mfix_vars1(";;    #[test]", ";;    #[test]")
   Call: (272) [apply] apply:maplist_([1500, 0], _6026, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1500, 0], [_23028|_23030], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1500, _23028)
^  Unify: (273) [user] mfix_vars1(1500, _23028)
   Call: (274) [system] var(1500)
^  Redo: (273) [user] mfix_vars1(1500, _23028)
^  Unify: (273) [user] mfix_vars1(1500, '$VAR'(_27674))
   Call: (274) [system] atom(1500)
^  Redo: (273) [user] mfix_vars1(1500, _23028)
^  Unify: (273) [user] mfix_vars1(1500, _23028)
   Call: (274) [system] 1500==true
^  Redo: (273) [user] mfix_vars1(1500, _23028)
^  Unify: (273) [user] mfix_vars1(1500, _23028)
   Call: (274) [system] 1500==false
^  Redo: (273) [user] mfix_vars1(1500, _23028)
^  Unify: (273) [user] mfix_vars1(1500, _23028)
   Call: (274) [system] 1500==[_36954, _36960]
^  Redo: (273) [user] mfix_vars1(1500, _23028)
^  Unify: (273) [user] mfix_vars1(1500, _23028)
   Call: (274) [system] is_list(1500)
^  Redo: (273) [user] mfix_vars1(1500, _23028)
^  Unify: (273) [user] mfix_vars1(1500, _23028)
   Call: (274) [system] string(1500)
^  Redo: (273) [user] mfix_vars1(1500, _23028)
^  Unify: (273) [user] mfix_vars1(1500, _23028)
   Call: (274) [system] compound(1500)
^  Redo: (273) [user] mfix_vars1(1500, _23028)
^  Unify: (273) [user] mfix_vars1(1500, _23028)
^  Call: (274) [user] symbol(1500)
^  Unify: (274) [user] symbol(1500)
   Call: (275) [system] atom(1500)
   Fail: (275) [system] atom(1500)
^  Fail: (274) [user] symbol(1500)
^  Redo: (273) [user] mfix_vars1(1500, _23028)
   Call: (274) [system] 1500=_23028
   Exit: (274) [system] 1500=1500
^  Exit: (273) [user] mfix_vars1(1500, 1500)
   Call: (273) [apply] apply:maplist_([0], _23030, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_57354|_57356], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _57354)
^  Unify: (274) [user] mfix_vars1(0, _57354)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _57354)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_62000))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _57354)
^  Unify: (274) [user] mfix_vars1(0, _57354)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _57354)
^  Unify: (274) [user] mfix_vars1(0, _57354)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _57354)
^  Unify: (274) [user] mfix_vars1(0, _57354)
   Call: (275) [system] 0==[_71280, _71286]
^  Redo: (274) [user] mfix_vars1(0, _57354)
^  Unify: (274) [user] mfix_vars1(0, _57354)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _57354)
^  Unify: (274) [user] mfix_vars1(0, _57354)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _57354)
^  Unify: (274) [user] mfix_vars1(0, _57354)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _57354)
^  Unify: (274) [user] mfix_vars1(0, _57354)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _57354)
   Call: (275) [system] 0=_57354
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _57356, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1500, 0], [1500, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    #[test]", 1500, 0], [";;    #[test]", 1500, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[test]", 1500, 0], [";;    #[test]", 1500, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";;    #[test]", 1500, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT', [";;    #[test]", 1500, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1500, 0)\=@='$COMMENT'(";;    #[test]", 1500, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1500, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    #[test]", 1500, 0), _107528))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1500, 0), _107528))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1500, 0), _107528))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1500, 0), _107528))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1500, 0), _107528)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1500, 0), _107528)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    #[test]", 1500, 0), _113114))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1500, 0), _113114))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    #[test]", 1500, 0), _113114)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1500, 0), _113114)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1500, 0), _113114)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1500, 0)\=@='$COMMENT'(";;    #[test]", 1500, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1500, 0), _107528)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    #[test]", 1500, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1500, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1500, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1500, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1500, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1500, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    #[test]", 1500, 0), _135434))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1500, 0), _135434))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    #[test]", 1500, 0), _135434)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1500, 0), _135434)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1500, 0), _135434)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[test]", 1500, 0)\=@='$COMMENT'(";;    #[test]", 1500, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1500, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0)))
   Call: (261) [system] '$COMMENT'(";;    #[test]", 1500, 0)\=@='$COMMENT'(";;    #[test]", 1500, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1500, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1500, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1500, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1500, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1500, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1500, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    #[test]", 1500, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1500, 0), _164212, [], _164214)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    #[test]", 1500, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1500, 0), _164212, [], _164214)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1500, 0), _164212, [], _164214)
   Call: (258) [system] atom('$COMMENT'(";;    #[test]", 1500, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1500, 0), _164212, [], _164214)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1500, 0), _164212, [], _164214)
   Call: (258) [system] compound('$COMMENT'(";;    #[test]", 1500, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    #[test]", 1500, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1500, 0), _173528, _173530)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT', [";;    #[test]", 1500, 0])
^  Call: (258) [user] subst_vars([";;    #[test]", 1500, 0], _175414, [], _164214)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1500, 0], [";;    #[test]", 1500, 0], [], [])
   Call: (259) [system] var([";;    #[test]", 1500, 0])
^  Redo: (258) [user] subst_vars([";;    #[test]", 1500, 0], _175414, [], _164214)
^  Unify: (258) [user] subst_vars([";;    #[test]", 1500, 0], [_179150|_179152], [], _164214)
^  Call: (259) [user] subst_vars(";;    #[test]", _179150, [], _180090)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
   Call: (260) [system] var(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _179150, [], _180090)
^  Unify: (259) [user] subst_vars(";;    #[test]", _179150, [], _180090)
   Call: (260) [system] atom(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _179150, [], _180090)
^  Unify: (259) [user] subst_vars(";;    #[test]", _179150, [], _180090)
   Call: (260) [system] compound(";;    #[test]")
^  Redo: (259) [user] subst_vars(";;    #[test]", _179150, [], _180090)
^  Unify: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Exit: (259) [user] subst_vars(";;    #[test]", ";;    #[test]", [], [])
^  Call: (259) [user] subst_vars([1500, 0], _179152, [], _164214)
^  Unify: (259) [user] subst_vars([1500, 0], [1500, 0], [], [])
   Call: (260) [system] var([1500, 0])
^  Redo: (259) [user] subst_vars([1500, 0], _179152, [], _164214)
^  Unify: (259) [user] subst_vars([1500, 0], [_195022|_195024], [], _164214)
^  Call: (260) [user] subst_vars(1500, _195022, [], _195962)
^  Unify: (260) [user] subst_vars(1500, 1500, [], [])
   Call: (261) [system] var(1500)
^  Redo: (260) [user] subst_vars(1500, _195022, [], _195962)
^  Unify: (260) [user] subst_vars(1500, _195022, [], _195962)
   Call: (261) [system] atom(1500)
^  Redo: (260) [user] subst_vars(1500, _195022, [], _195962)
^  Unify: (260) [user] subst_vars(1500, _195022, [], _195962)
   Call: (261) [system] compound(1500)
^  Redo: (260) [user] subst_vars(1500, _195022, [], _195962)
^  Unify: (260) [user] subst_vars(1500, 1500, [], [])
^  Exit: (260) [user] subst_vars(1500, 1500, [], [])
^  Call: (260) [user] subst_vars([0], _195024, [], _164214)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _195024, [], _164214)
^  Unify: (260) [user] subst_vars([0], [_210894|_210896], [], _164214)
^  Call: (261) [user] subst_vars(0, _210894, [], _211834)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _210894, [], _211834)
^  Unify: (261) [user] subst_vars(0, _210894, [], _211834)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _210894, [], _211834)
^  Unify: (261) [user] subst_vars(0, _210894, [], _211834)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _210894, [], _211834)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _210896, [], _164214)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _210896, [], _164214)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1500, 0], [1500, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    #[test]", 1500, 0], [";;    #[test]", 1500, 0], [], [])
   Call: (258) [system] compound_name_arguments(_164212, '$COMMENT', [";;    #[test]", 1500, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT', [";;    #[test]", 1500, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    #[test]", 1500, 0), '$COMMENT'(";;    #[test]", 1500, 0), [], [])
   Call: (257) [system] _234252=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1500, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1500, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1500, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1500, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1500, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1500, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1500, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1500, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[test]", 1500, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1501, 0, 53826, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$stream_position'(53826, 1501, 0, 53860)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _286980))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _286980))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _286980)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _286980)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _286980)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _286980)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _292592))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _292592))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _292592))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _292592))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _292592)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _292592)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _298178))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _298178))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _298178)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _298178)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _298178)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _298178)
   Call: (270) [system] var('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _298178)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$VAR'(_305638))
   Call: (270) [system] atom('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _298178)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _298178)
   Call: (270) [system] '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _298178)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _298178)
   Call: (270) [system] '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _298178)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _298178)
   Call: (270) [system] '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0)==[_314918, _314924]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _298178)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _298178)
   Call: (270) [system] is_list('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _298178)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _298178)
   Call: (270) [system] string('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _298178)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _298178)
   Call: (270) [system] compound('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _325120, _325122)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT', [";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0], _328862)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0], _328862)
   Call: (271) [apply] apply:maplist_([";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0], _328862, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0], [_331680|_331682], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    fn use_sealed_to_make_scoped_variable() {", _331680)
^  Unify: (272) [user] mfix_vars1(";;    fn use_sealed_to_make_scoped_variable() {", _331680)
   Call: (273) [system] var(";;    fn use_sealed_to_make_scoped_variable() {")
^  Redo: (272) [user] mfix_vars1(";;    fn use_sealed_to_make_scoped_variable() {", _331680)
^  Unify: (272) [user] mfix_vars1(";;    fn use_sealed_to_make_scoped_variable() {", '$VAR'(_336326))
   Call: (273) [system] atom(";;    fn use_sealed_to_make_scoped_variable() {")
^  Redo: (272) [user] mfix_vars1(";;    fn use_sealed_to_make_scoped_variable() {", _331680)
^  Unify: (272) [user] mfix_vars1(";;    fn use_sealed_to_make_scoped_variable() {", _331680)
   Call: (273) [system] ";;    fn use_sealed_to_make_scoped_variable() {"==true
^  Redo: (272) [user] mfix_vars1(";;    fn use_sealed_to_make_scoped_variable() {", _331680)
^  Unify: (272) [user] mfix_vars1(";;    fn use_sealed_to_make_scoped_variable() {", _331680)
   Call: (273) [system] ";;    fn use_sealed_to_make_scoped_variable() {"==false
^  Redo: (272) [user] mfix_vars1(";;    fn use_sealed_to_make_scoped_variable() {", _331680)
^  Unify: (272) [user] mfix_vars1(";;    fn use_sealed_to_make_scoped_variable() {", _331680)
   Call: (273) [system] ";;    fn use_sealed_to_make_scoped_variable() {"==[_345606, _345612]
^  Redo: (272) [user] mfix_vars1(";;    fn use_sealed_to_make_scoped_variable() {", _331680)
^  Unify: (272) [user] mfix_vars1(";;    fn use_sealed_to_make_scoped_variable() {", _331680)
   Call: (273) [system] is_list(";;    fn use_sealed_to_make_scoped_variable() {")
^  Redo: (272) [user] mfix_vars1(";;    fn use_sealed_to_make_scoped_variable() {", _331680)
^  Unify: (272) [user] mfix_vars1(";;    fn use_sealed_to_make_scoped_variable() {", _331680)
   Call: (273) [system] string(";;    fn use_sealed_to_make_scoped_variable() {")
   Exit: (273) [system] string(";;    fn use_sealed_to_make_scoped_variable() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    fn use_sealed_to_make_scoped_variable() {", _331680)
^  Unify: (272) [user] mfix_vars1(";;    fn use_sealed_to_make_scoped_variable() {", _331680)
   Call: (273) [system] compound(";;    fn use_sealed_to_make_scoped_variable() {")
^  Redo: (272) [user] mfix_vars1(";;    fn use_sealed_to_make_scoped_variable() {", _331680)
^  Unify: (272) [user] mfix_vars1(";;    fn use_sealed_to_make_scoped_variable() {", _331680)
^  Call: (273) [user] symbol(";;    fn use_sealed_to_make_scoped_variable() {")
^  Unify: (273) [user] symbol(";;    fn use_sealed_to_make_scoped_variable() {")
   Call: (274) [system] atom(";;    fn use_sealed_to_make_scoped_variable() {")
   Fail: (274) [system] atom(";;    fn use_sealed_to_make_scoped_variable() {")
^  Fail: (273) [user] symbol(";;    fn use_sealed_to_make_scoped_variable() {")
^  Redo: (272) [user] mfix_vars1(";;    fn use_sealed_to_make_scoped_variable() {", _331680)
   Call: (273) [system] ";;    fn use_sealed_to_make_scoped_variable() {"=_331680
   Exit: (273) [system] ";;    fn use_sealed_to_make_scoped_variable() {"=";;    fn use_sealed_to_make_scoped_variable() {"
^  Exit: (272) [user] mfix_vars1(";;    fn use_sealed_to_make_scoped_variable() {", ";;    fn use_sealed_to_make_scoped_variable() {")
   Call: (272) [apply] apply:maplist_([1501, 0], _331682, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1501, 0], [_369678|_369680], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1501, _369678)
^  Unify: (273) [user] mfix_vars1(1501, _369678)
   Call: (274) [system] var(1501)
^  Redo: (273) [user] mfix_vars1(1501, _369678)
^  Unify: (273) [user] mfix_vars1(1501, '$VAR'(_374324))
   Call: (274) [system] atom(1501)
^  Redo: (273) [user] mfix_vars1(1501, _369678)
^  Unify: (273) [user] mfix_vars1(1501, _369678)
   Call: (274) [system] 1501==true
^  Redo: (273) [user] mfix_vars1(1501, _369678)
^  Unify: (273) [user] mfix_vars1(1501, _369678)
   Call: (274) [system] 1501==false
^  Redo: (273) [user] mfix_vars1(1501, _369678)
^  Unify: (273) [user] mfix_vars1(1501, _369678)
   Call: (274) [system] 1501==[_383604, _383610]
^  Redo: (273) [user] mfix_vars1(1501, _369678)
^  Unify: (273) [user] mfix_vars1(1501, _369678)
   Call: (274) [system] is_list(1501)
^  Redo: (273) [user] mfix_vars1(1501, _369678)
^  Unify: (273) [user] mfix_vars1(1501, _369678)
   Call: (274) [system] string(1501)
^  Redo: (273) [user] mfix_vars1(1501, _369678)
^  Unify: (273) [user] mfix_vars1(1501, _369678)
   Call: (274) [system] compound(1501)
^  Redo: (273) [user] mfix_vars1(1501, _369678)
^  Unify: (273) [user] mfix_vars1(1501, _369678)
^  Call: (274) [user] symbol(1501)
^  Unify: (274) [user] symbol(1501)
   Call: (275) [system] atom(1501)
   Fail: (275) [system] atom(1501)
^  Fail: (274) [user] symbol(1501)
^  Redo: (273) [user] mfix_vars1(1501, _369678)
   Call: (274) [system] 1501=_369678
   Exit: (274) [system] 1501=1501
^  Exit: (273) [user] mfix_vars1(1501, 1501)
   Call: (273) [apply] apply:maplist_([0], _369680, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_404004|_404006], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _404004)
^  Unify: (274) [user] mfix_vars1(0, _404004)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _404004)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_408650))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _404004)
^  Unify: (274) [user] mfix_vars1(0, _404004)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _404004)
^  Unify: (274) [user] mfix_vars1(0, _404004)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _404004)
^  Unify: (274) [user] mfix_vars1(0, _404004)
   Call: (275) [system] 0==[_417930, _417936]
^  Redo: (274) [user] mfix_vars1(0, _404004)
^  Unify: (274) [user] mfix_vars1(0, _404004)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _404004)
^  Unify: (274) [user] mfix_vars1(0, _404004)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _404004)
^  Unify: (274) [user] mfix_vars1(0, _404004)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _404004)
^  Unify: (274) [user] mfix_vars1(0, _404004)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _404004)
   Call: (275) [system] 0=_404004
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _404006, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1501, 0], [1501, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0], [";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0], [";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0])
   Call: (270) [system] compound_name_arguments(_298178, '$COMMENT', [";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT', [";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0)\=@='$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _292592)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _454178))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _454178))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _454178))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _454178))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _454178)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _454178)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _459764))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _459764))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _459764)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _459764)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _459764)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0)\=@='$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _454178)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _286980))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _286980))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _286980))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _286980))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _286980)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _286980)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _482084))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _482084))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _482084)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _482084)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _482084)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0)))
   Call: (267) [system] '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0)\=@='$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _286980)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0)))
   Call: (261) [system] '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0)\=@='$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _510862, [], _510864)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _510862, [], _510864)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _510862, [], _510864)
   Call: (258) [system] atom('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _510862, [], _510864)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _510862, [], _510864)
   Call: (258) [system] compound('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), _520178, _520180)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT', [";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0])
^  Call: (258) [user] subst_vars([";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0], _522064, [], _510864)
^  Unify: (258) [user] subst_vars([";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0], [";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0], [], [])
   Call: (259) [system] var([";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0])
^  Redo: (258) [user] subst_vars([";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0], _5974, [], _5950)
^  Unify: (258) [user] subst_vars([";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0], [_7782|_7784], [], _5950)
^  Call: (259) [user] subst_vars(";;    fn use_sealed_to_make_scoped_variable() {", _7782, [], _8722)
^  Unify: (259) [user] subst_vars(";;    fn use_sealed_to_make_scoped_variable() {", ";;    fn use_sealed_to_make_scoped_variable() {", [], [])
   Call: (260) [system] var(";;    fn use_sealed_to_make_scoped_variable() {")
^  Redo: (259) [user] subst_vars(";;    fn use_sealed_to_make_scoped_variable() {", _7782, [], _8722)
^  Unify: (259) [user] subst_vars(";;    fn use_sealed_to_make_scoped_variable() {", _7782, [], _8722)
   Call: (260) [system] atom(";;    fn use_sealed_to_make_scoped_variable() {")
^  Redo: (259) [user] subst_vars(";;    fn use_sealed_to_make_scoped_variable() {", _7782, [], _8722)
^  Unify: (259) [user] subst_vars(";;    fn use_sealed_to_make_scoped_variable() {", _7782, [], _8722)
   Call: (260) [system] compound(";;    fn use_sealed_to_make_scoped_variable() {")
^  Redo: (259) [user] subst_vars(";;    fn use_sealed_to_make_scoped_variable() {", _7782, [], _8722)
^  Unify: (259) [user] subst_vars(";;    fn use_sealed_to_make_scoped_variable() {", ";;    fn use_sealed_to_make_scoped_variable() {", [], [])
^  Exit: (259) [user] subst_vars(";;    fn use_sealed_to_make_scoped_variable() {", ";;    fn use_sealed_to_make_scoped_variable() {", [], [])
^  Call: (259) [user] subst_vars([1501, 0], _7784, [], _5950)
^  Unify: (259) [user] subst_vars([1501, 0], [1501, 0], [], [])
   Call: (260) [system] var([1501, 0])
^  Redo: (259) [user] subst_vars([1501, 0], _7784, [], _5950)
^  Unify: (259) [user] subst_vars([1501, 0], [_23654|_23656], [], _5950)
^  Call: (260) [user] subst_vars(1501, _23654, [], _24594)
^  Unify: (260) [user] subst_vars(1501, 1501, [], [])
   Call: (261) [system] var(1501)
^  Redo: (260) [user] subst_vars(1501, _23654, [], _24594)
^  Unify: (260) [user] subst_vars(1501, _23654, [], _24594)
   Call: (261) [system] atom(1501)
^  Redo: (260) [user] subst_vars(1501, _23654, [], _24594)
^  Unify: (260) [user] subst_vars(1501, _23654, [], _24594)
   Call: (261) [system] compound(1501)
^  Redo: (260) [user] subst_vars(1501, _23654, [], _24594)
^  Unify: (260) [user] subst_vars(1501, 1501, [], [])
^  Exit: (260) [user] subst_vars(1501, 1501, [], [])
^  Call: (260) [user] subst_vars([0], _23656, [], _5950)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _23656, [], _5950)
^  Unify: (260) [user] subst_vars([0], [_39526|_39528], [], _5950)
^  Call: (261) [user] subst_vars(0, _39526, [], _40466)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _39526, [], _40466)
^  Unify: (261) [user] subst_vars(0, _39526, [], _40466)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _39526, [], _40466)
^  Unify: (261) [user] subst_vars(0, _39526, [], _40466)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _39526, [], _40466)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _39528, [], _5950)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _39528, [], _5950)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1501, 0], [1501, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0], [";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5948, '$COMMENT', [";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT', [";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), [], [])
   Call: (257) [system] _62884=metta_file_buffer(+, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    fn use_sealed_to_make_scoped_variable() {", 1501, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1502, 0, 53874, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$stream_position'(53874, 1502, 0, 53908)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _115628))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _115628))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _115628)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _115628)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _115628)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _115628)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _121240))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _121240))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _121240))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _121240))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _121240)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _121240)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _126826))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _126826))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _126826)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _126826)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _126826)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _126826)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _126826)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$VAR'(_134286))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _126826)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _126826)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _126826)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _126826)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _126826)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _126826)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0)==[_143566, _143572]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _126826)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _126826)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _126826)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _126826)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _126826)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _126826)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _153768, _153770)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT', [";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0], _157510)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0], _157510)
   Call: (271) [apply] apply:maplist_([";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0], _157510, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0], [_160328|_160330], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _160328)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _160328)
   Call: (273) [system] var(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _160328)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", '$VAR'(_164974))
   Call: (273) [system] atom(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _160328)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _160328)
   Call: (273) [system] ";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _160328)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _160328)
   Call: (273) [system] ";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _160328)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _160328)
   Call: (273) [system] ";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));"==[_174254, _174260]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _160328)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _160328)
   Call: (273) [system] is_list(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _160328)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _160328)
   Call: (273) [system] string(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
   Exit: (273) [system] string(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _160328)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _160328)
   Call: (273) [system] compound(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _160328)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _160328)
^  Call: (273) [user] symbol(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Unify: (273) [user] symbol(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
   Call: (274) [system] atom(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
   Fail: (274) [system] atom(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Fail: (273) [user] symbol(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _160328)
   Call: (273) [system] ";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));"=_160328
   Exit: (273) [system] ";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));"=";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", ";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
   Call: (272) [apply] apply:maplist_([1502, 0], _160330, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1502, 0], [_198326|_198328], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1502, _198326)
^  Unify: (273) [user] mfix_vars1(1502, _198326)
   Call: (274) [system] var(1502)
^  Redo: (273) [user] mfix_vars1(1502, _198326)
^  Unify: (273) [user] mfix_vars1(1502, '$VAR'(_202972))
   Call: (274) [system] atom(1502)
^  Redo: (273) [user] mfix_vars1(1502, _198326)
^  Unify: (273) [user] mfix_vars1(1502, _198326)
   Call: (274) [system] 1502==true
^  Redo: (273) [user] mfix_vars1(1502, _198326)
^  Unify: (273) [user] mfix_vars1(1502, _198326)
   Call: (274) [system] 1502==false
^  Redo: (273) [user] mfix_vars1(1502, _198326)
^  Unify: (273) [user] mfix_vars1(1502, _198326)
   Call: (274) [system] 1502==[_212252, _212258]
^  Redo: (273) [user] mfix_vars1(1502, _198326)
^  Unify: (273) [user] mfix_vars1(1502, _198326)
   Call: (274) [system] is_list(1502)
^  Redo: (273) [user] mfix_vars1(1502, _198326)
^  Unify: (273) [user] mfix_vars1(1502, _198326)
   Call: (274) [system] string(1502)
^  Redo: (273) [user] mfix_vars1(1502, _198326)
^  Unify: (273) [user] mfix_vars1(1502, _198326)
   Call: (274) [system] compound(1502)
^  Redo: (273) [user] mfix_vars1(1502, _198326)
^  Unify: (273) [user] mfix_vars1(1502, _198326)
^  Call: (274) [user] symbol(1502)
^  Unify: (274) [user] symbol(1502)
   Call: (275) [system] atom(1502)
   Fail: (275) [system] atom(1502)
^  Fail: (274) [user] symbol(1502)
^  Redo: (273) [user] mfix_vars1(1502, _198326)
   Call: (274) [system] 1502=_198326
   Exit: (274) [system] 1502=1502
^  Exit: (273) [user] mfix_vars1(1502, 1502)
   Call: (273) [apply] apply:maplist_([0], _198328, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_232652|_232654], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _232652)
^  Unify: (274) [user] mfix_vars1(0, _232652)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _232652)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_237298))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _232652)
^  Unify: (274) [user] mfix_vars1(0, _232652)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _232652)
^  Unify: (274) [user] mfix_vars1(0, _232652)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _232652)
^  Unify: (274) [user] mfix_vars1(0, _232652)
   Call: (275) [system] 0==[_246578, _246584]
^  Redo: (274) [user] mfix_vars1(0, _232652)
^  Unify: (274) [user] mfix_vars1(0, _232652)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _232652)
^  Unify: (274) [user] mfix_vars1(0, _232652)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _232652)
^  Unify: (274) [user] mfix_vars1(0, _232652)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _232652)
^  Unify: (274) [user] mfix_vars1(0, _232652)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _232652)
   Call: (275) [system] 0=_232652
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _232654, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1502, 0], [1502, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0], [";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0], [";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0])
   Call: (270) [system] compound_name_arguments(_126826, '$COMMENT', [";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT', [";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0)\=@='$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _121240)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _282826))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _282826))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _282826))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _282826))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _282826)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _282826)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _288412))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _288412))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _288412)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _288412)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _288412)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0)\=@='$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _282826)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _115628))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _115628))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _115628))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _115628))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _115628)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _115628)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _310732))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _310732))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _310732)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _310732)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _310732)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0)\=@='$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _115628)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0)\=@='$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _339510, [], _339512)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _339510, [], _339512)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _339510, [], _339512)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _339510, [], _339512)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _339510, [], _339512)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), _348826, _348828)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT', [";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0], _350712, [], _339512)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0], [";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0], [], [])
   Call: (259) [system] var([";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0], _350712, [], _339512)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0], [_354448|_354450], [], _339512)
^  Call: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _354448, [], _355388)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", ";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", [], [])
   Call: (260) [system] var(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _354448, [], _355388)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _354448, [], _355388)
   Call: (260) [system] atom(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _354448, [], _355388)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _354448, [], _355388)
   Call: (260) [system] compound(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _354448, [], _355388)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", ";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", ";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", [], [])
^  Call: (259) [user] subst_vars([1502, 0], _354450, [], _339512)
^  Unify: (259) [user] subst_vars([1502, 0], [1502, 0], [], [])
   Call: (260) [system] var([1502, 0])
^  Redo: (259) [user] subst_vars([1502, 0], _354450, [], _339512)
^  Unify: (259) [user] subst_vars([1502, 0], [_370320|_370322], [], _339512)
^  Call: (260) [user] subst_vars(1502, _370320, [], _371260)
^  Unify: (260) [user] subst_vars(1502, 1502, [], [])
   Call: (261) [system] var(1502)
^  Redo: (260) [user] subst_vars(1502, _370320, [], _371260)
^  Unify: (260) [user] subst_vars(1502, _370320, [], _371260)
   Call: (261) [system] atom(1502)
^  Redo: (260) [user] subst_vars(1502, _370320, [], _371260)
^  Unify: (260) [user] subst_vars(1502, _370320, [], _371260)
   Call: (261) [system] compound(1502)
^  Redo: (260) [user] subst_vars(1502, _370320, [], _371260)
^  Unify: (260) [user] subst_vars(1502, 1502, [], [])
^  Exit: (260) [user] subst_vars(1502, 1502, [], [])
^  Call: (260) [user] subst_vars([0], _370322, [], _339512)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _370322, [], _339512)
^  Unify: (260) [user] subst_vars([0], [_386192|_386194], [], _339512)
^  Call: (261) [user] subst_vars(0, _386192, [], _387132)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _386192, [], _387132)
^  Unify: (261) [user] subst_vars(0, _386192, [], _387132)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _386192, [], _387132)
^  Unify: (261) [user] subst_vars(0, _386192, [], _387132)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _386192, [], _387132)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _386194, [], _339512)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _386194, [], _339512)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1502, 0], [1502, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0], [";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0], [], [])
   Call: (258) [system] compound_name_arguments(_339510, '$COMMENT', [";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT', [";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), [], [])
   Call: (257) [system] _409550=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(let $x (input $x) (output $x))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1502, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1503, 0, 53990, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$stream_position'(53990, 1503, 0, 54024)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _462290))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _462290))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _462290)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _462290)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _462290)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _462290)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _467902))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _467902))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _467902))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _467902))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _467902)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _467902)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _473488))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _473488))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _473488)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _473488)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _473488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _473488)
   Call: (270) [system] var('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _473488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$VAR'(_480948))
   Call: (270) [system] atom('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _473488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _473488)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _473488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _473488)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _473488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _473488)
   Call: (270) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0)==[_490228, _490234]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _473488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _473488)
   Call: (270) [system] is_list('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _473488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _473488)
   Call: (270) [system] string('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _473488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _473488)
   Call: (270) [system] compound('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _500430, _500432)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT', [";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0], _504172)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0], _504172)
   Call: (271) [apply] apply:maplist_([";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0], _504172, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0], [_506990|_506992], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _506990)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _506990)
   Call: (273) [system] var(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _506990)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", '$VAR'(_511636))
   Call: (273) [system] atom(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _506990)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _506990)
   Call: (273) [system] ";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))"==true
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _506990)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _506990)
   Call: (273) [system] ";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))"==false
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _506990)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _506990)
   Call: (273) [system] ";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))"==[_520916, _520922]
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _506990)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _506990)
   Call: (273) [system] is_list(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _6046)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _6046)
   Call: (273) [system] string(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
   Exit: (273) [system] string(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _6046)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _6046)
   Call: (273) [system] compound(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _6046)
^  Unify: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _6046)
^  Call: (273) [user] symbol(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
^  Unify: (273) [user] symbol(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
   Call: (274) [system] atom(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
   Fail: (274) [system] atom(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
^  Fail: (273) [user] symbol(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
^  Redo: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _6046)
   Call: (273) [system] ";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))"=_6046
   Exit: (273) [system] ";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))"=";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))"
^  Exit: (272) [user] mfix_vars1(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", ";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
   Call: (272) [apply] apply:maplist_([1503, 0], _6048, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1503, 0], [_27110|_27112], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1503, _27110)
^  Unify: (273) [user] mfix_vars1(1503, _27110)
   Call: (274) [system] var(1503)
^  Redo: (273) [user] mfix_vars1(1503, _27110)
^  Unify: (273) [user] mfix_vars1(1503, '$VAR'(_31756))
   Call: (274) [system] atom(1503)
^  Redo: (273) [user] mfix_vars1(1503, _27110)
^  Unify: (273) [user] mfix_vars1(1503, _27110)
   Call: (274) [system] 1503==true
^  Redo: (273) [user] mfix_vars1(1503, _27110)
^  Unify: (273) [user] mfix_vars1(1503, _27110)
   Call: (274) [system] 1503==false
^  Redo: (273) [user] mfix_vars1(1503, _27110)
^  Unify: (273) [user] mfix_vars1(1503, _27110)
   Call: (274) [system] 1503==[_41036, _41042]
^  Redo: (273) [user] mfix_vars1(1503, _27110)
^  Unify: (273) [user] mfix_vars1(1503, _27110)
   Call: (274) [system] is_list(1503)
^  Redo: (273) [user] mfix_vars1(1503, _27110)
^  Unify: (273) [user] mfix_vars1(1503, _27110)
   Call: (274) [system] string(1503)
^  Redo: (273) [user] mfix_vars1(1503, _27110)
^  Unify: (273) [user] mfix_vars1(1503, _27110)
   Call: (274) [system] compound(1503)
^  Redo: (273) [user] mfix_vars1(1503, _27110)
^  Unify: (273) [user] mfix_vars1(1503, _27110)
^  Call: (274) [user] symbol(1503)
^  Unify: (274) [user] symbol(1503)
   Call: (275) [system] atom(1503)
   Fail: (275) [system] atom(1503)
^  Fail: (274) [user] symbol(1503)
^  Redo: (273) [user] mfix_vars1(1503, _27110)
   Call: (274) [system] 1503=_27110
   Exit: (274) [system] 1503=1503
^  Exit: (273) [user] mfix_vars1(1503, 1503)
   Call: (273) [apply] apply:maplist_([0], _27112, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_61436|_61438], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _61436)
^  Unify: (274) [user] mfix_vars1(0, _61436)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _61436)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_66082))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _61436)
^  Unify: (274) [user] mfix_vars1(0, _61436)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _61436)
^  Unify: (274) [user] mfix_vars1(0, _61436)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _61436)
^  Unify: (274) [user] mfix_vars1(0, _61436)
   Call: (275) [system] 0==[_75362, _75368]
^  Redo: (274) [user] mfix_vars1(0, _61436)
^  Unify: (274) [user] mfix_vars1(0, _61436)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _61436)
^  Unify: (274) [user] mfix_vars1(0, _61436)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _61436)
^  Unify: (274) [user] mfix_vars1(0, _61436)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _61436)
^  Unify: (274) [user] mfix_vars1(0, _61436)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _61436)
   Call: (275) [system] 0=_61436
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _61438, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1503, 0], [1503, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0], [";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0], [";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0])
   Call: (270) [system] compound_name_arguments(_6000, '$COMMENT', [";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT', [";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0)\=@='$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _5986)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _111610))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _111610))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _111610))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _111610))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _111610)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _111610)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _117196))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _117196))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _117196)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _117196)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _117196)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0)\=@='$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _111610)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _5966))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _5966))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _5966))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _5966))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _5966)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _5966)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _139516))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _139516))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _139516)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _139516)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _139516)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0)))
   Call: (267) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0)\=@='$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _5966)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0)))
   Call: (261) [system] '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0)\=@='$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _168294, [], _168296)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _168294, [], _168296)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _168294, [], _168296)
   Call: (258) [system] atom('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _168294, [], _168296)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _168294, [], _168296)
   Call: (258) [system] compound('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), _177610, _177612)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT', [";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0])
^  Call: (258) [user] subst_vars([";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0], _179496, [], _168296)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0], [";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0], [], [])
   Call: (259) [system] var([";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0])
^  Redo: (258) [user] subst_vars([";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0], _179496, [], _168296)
^  Unify: (258) [user] subst_vars([";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0], [_183232|_183234], [], _168296)
^  Call: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _183232, [], _184172)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", ";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", [], [])
   Call: (260) [system] var(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _183232, [], _184172)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _183232, [], _184172)
   Call: (260) [system] atom(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _183232, [], _184172)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _183232, [], _184172)
   Call: (260) [system] compound(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))")
^  Redo: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", _183232, [], _184172)
^  Unify: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", ";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", [], [])
^  Exit: (259) [user] subst_vars(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", ";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", [], [])
^  Call: (259) [user] subst_vars([1503, 0], _183234, [], _168296)
^  Unify: (259) [user] subst_vars([1503, 0], [1503, 0], [], [])
   Call: (260) [system] var([1503, 0])
^  Redo: (259) [user] subst_vars([1503, 0], _183234, [], _168296)
^  Unify: (259) [user] subst_vars([1503, 0], [_199104|_199106], [], _168296)
^  Call: (260) [user] subst_vars(1503, _199104, [], _200044)
^  Unify: (260) [user] subst_vars(1503, 1503, [], [])
   Call: (261) [system] var(1503)
^  Redo: (260) [user] subst_vars(1503, _199104, [], _200044)
^  Unify: (260) [user] subst_vars(1503, _199104, [], _200044)
   Call: (261) [system] atom(1503)
^  Redo: (260) [user] subst_vars(1503, _199104, [], _200044)
^  Unify: (260) [user] subst_vars(1503, _199104, [], _200044)
   Call: (261) [system] compound(1503)
^  Redo: (260) [user] subst_vars(1503, _199104, [], _200044)
^  Unify: (260) [user] subst_vars(1503, 1503, [], [])
^  Exit: (260) [user] subst_vars(1503, 1503, [], [])
^  Call: (260) [user] subst_vars([0], _199106, [], _168296)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _199106, [], _168296)
^  Unify: (260) [user] subst_vars([0], [_214976|_214978], [], _168296)
^  Call: (261) [user] subst_vars(0, _214976, [], _215916)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _214976, [], _215916)
^  Unify: (261) [user] subst_vars(0, _214976, [], _215916)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _214976, [], _215916)
^  Unify: (261) [user] subst_vars(0, _214976, [], _215916)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _214976, [], _215916)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _214978, [], _168296)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _214978, [], _168296)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1503, 0], [1503, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0], [";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0], [], [])
   Call: (258) [system] compound_name_arguments(_168294, '$COMMENT', [";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT', [";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), [], [])
   Call: (257) [system] _238334=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        assert_eq!(run_program(\"!(let (quote ($sv $st)) (sealed ($x) (quote ($x (output $x))))", 1503, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1504, 0, 54087, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$stream_position'(54087, 1504, 0, 54121)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _291072))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _291072))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _291072)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _291072)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _291072)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _291072)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _296684))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _296684))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _296684))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _296684))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _296684)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _296684)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _302270))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _302270))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _302270)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _302270)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _302270)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _302270)
   Call: (270) [system] var('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _302270)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$VAR'(_309730))
   Call: (270) [system] atom('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _302270)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _302270)
   Call: (270) [system] '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _302270)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _302270)
   Call: (270) [system] '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _302270)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _302270)
   Call: (270) [system] '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0)==[_319010, _319016]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _302270)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _302270)
   Call: (270) [system] is_list('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _302270)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _302270)
   Call: (270) [system] string('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _302270)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _302270)
   Call: (270) [system] compound('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
   Exit: (270) [system] compound('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _329212, _329214)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT', [";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0], _332954)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0], _332954)
   Call: (271) [apply] apply:maplist_([";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0], _332954, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0], [_335772|_335774], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _335772)
^  Unify: (272) [user] mfix_vars1(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _335772)
   Call: (273) [system] var(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (272) [user] mfix_vars1(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _335772)
^  Unify: (272) [user] mfix_vars1(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", '$VAR'(_340418))
   Call: (273) [system] atom(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (272) [user] mfix_vars1(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _335772)
^  Unify: (272) [user] mfix_vars1(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _335772)
   Call: (273) [system] ";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));"==true
^  Redo: (272) [user] mfix_vars1(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _335772)
^  Unify: (272) [user] mfix_vars1(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _335772)
   Call: (273) [system] ";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));"==false
^  Redo: (272) [user] mfix_vars1(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _335772)
^  Unify: (272) [user] mfix_vars1(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _335772)
   Call: (273) [system] ";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));"==[_349698, _349704]
^  Redo: (272) [user] mfix_vars1(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _335772)
^  Unify: (272) [user] mfix_vars1(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _335772)
   Call: (273) [system] is_list(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (272) [user] mfix_vars1(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _335772)
^  Unify: (272) [user] mfix_vars1(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _335772)
   Call: (273) [system] string(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
   Exit: (273) [system] string(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _335772)
^  Unify: (272) [user] mfix_vars1(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _335772)
   Call: (273) [system] compound(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (272) [user] mfix_vars1(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _335772)
^  Unify: (272) [user] mfix_vars1(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _335772)
^  Call: (273) [user] symbol(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Unify: (273) [user] symbol(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
   Call: (274) [system] atom(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
   Fail: (274) [system] atom(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Fail: (273) [user] symbol(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (272) [user] mfix_vars1(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _335772)
   Call: (273) [system] ";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));"=_335772
   Exit: (273) [system] ";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));"=";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));"
^  Exit: (272) [user] mfix_vars1(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", ";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
   Call: (272) [apply] apply:maplist_([1504, 0], _335774, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1504, 0], [_373770|_373772], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1504, _373770)
^  Unify: (273) [user] mfix_vars1(1504, _373770)
   Call: (274) [system] var(1504)
^  Redo: (273) [user] mfix_vars1(1504, _373770)
^  Unify: (273) [user] mfix_vars1(1504, '$VAR'(_378416))
   Call: (274) [system] atom(1504)
^  Redo: (273) [user] mfix_vars1(1504, _373770)
^  Unify: (273) [user] mfix_vars1(1504, _373770)
   Call: (274) [system] 1504==true
^  Redo: (273) [user] mfix_vars1(1504, _373770)
^  Unify: (273) [user] mfix_vars1(1504, _373770)
   Call: (274) [system] 1504==false
^  Redo: (273) [user] mfix_vars1(1504, _373770)
^  Unify: (273) [user] mfix_vars1(1504, _373770)
   Call: (274) [system] 1504==[_387696, _387702]
^  Redo: (273) [user] mfix_vars1(1504, _373770)
^  Unify: (273) [user] mfix_vars1(1504, _373770)
   Call: (274) [system] is_list(1504)
^  Redo: (273) [user] mfix_vars1(1504, _373770)
^  Unify: (273) [user] mfix_vars1(1504, _373770)
   Call: (274) [system] string(1504)
^  Redo: (273) [user] mfix_vars1(1504, _373770)
^  Unify: (273) [user] mfix_vars1(1504, _373770)
   Call: (274) [system] compound(1504)
^  Redo: (273) [user] mfix_vars1(1504, _373770)
^  Unify: (273) [user] mfix_vars1(1504, _373770)
^  Call: (274) [user] symbol(1504)
^  Unify: (274) [user] symbol(1504)
   Call: (275) [system] atom(1504)
   Fail: (275) [system] atom(1504)
^  Fail: (274) [user] symbol(1504)
^  Redo: (273) [user] mfix_vars1(1504, _373770)
   Call: (274) [system] 1504=_373770
   Exit: (274) [system] 1504=1504
^  Exit: (273) [user] mfix_vars1(1504, 1504)
   Call: (273) [apply] apply:maplist_([0], _373772, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_408096|_408098], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _408096)
^  Unify: (274) [user] mfix_vars1(0, _408096)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _408096)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_412742))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _408096)
^  Unify: (274) [user] mfix_vars1(0, _408096)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _408096)
^  Unify: (274) [user] mfix_vars1(0, _408096)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _408096)
^  Unify: (274) [user] mfix_vars1(0, _408096)
   Call: (275) [system] 0==[_422022, _422028]
^  Redo: (274) [user] mfix_vars1(0, _408096)
^  Unify: (274) [user] mfix_vars1(0, _408096)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _408096)
^  Unify: (274) [user] mfix_vars1(0, _408096)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _408096)
^  Unify: (274) [user] mfix_vars1(0, _408096)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _408096)
^  Unify: (274) [user] mfix_vars1(0, _408096)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _408096)
   Call: (275) [system] 0=_408096
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _408098, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1504, 0], [1504, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0], [";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0], [";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0])
   Call: (270) [system] compound_name_arguments(_302270, '$COMMENT', [";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT', [";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0)))
   Call: (267) [system] '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0)\=@='$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _296684)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _458270))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _458270))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _458270))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _458270))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _458270)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _458270)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _463856))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _463856))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _463856)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _463856)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _463856)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0)))
   Call: (267) [system] '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0)\=@='$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _458270)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _291072))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _291072))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _291072))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _291072))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _291072)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _291072)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _486176))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _486176))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _486176)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _486176)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _486176)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0)))
   Call: (267) [system] '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0)\=@='$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _291072)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0)))
   Call: (261) [system] '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0)\=@='$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _514954, [], _514956)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _514954, [], _514956)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _514954, [], _514956)
   Call: (258) [system] atom('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _514954, [], _514956)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _514954, [], _514956)
   Call: (258) [system] compound('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
   Exit: (258) [system] compound('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), _6312, _6314)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT', [";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0])
^  Call: (258) [user] subst_vars([";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0], _8198, [], _5960)
^  Unify: (258) [user] subst_vars([";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0], [";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0], [], [])
   Call: (259) [system] var([";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0])
^  Redo: (258) [user] subst_vars([";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0], _8198, [], _5960)
^  Unify: (258) [user] subst_vars([";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0], [_11934|_11936], [], _5960)
^  Call: (259) [user] subst_vars(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _11934, [], _12874)
^  Unify: (259) [user] subst_vars(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", ";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", [], [])
   Call: (260) [system] var(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (259) [user] subst_vars(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _11934, [], _12874)
^  Unify: (259) [user] subst_vars(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _11934, [], _12874)
   Call: (260) [system] atom(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (259) [user] subst_vars(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _11934, [], _12874)
^  Unify: (259) [user] subst_vars(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _11934, [], _12874)
   Call: (260) [system] compound(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));")
^  Redo: (259) [user] subst_vars(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", _11934, [], _12874)
^  Unify: (259) [user] subst_vars(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", ";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", [], [])
^  Exit: (259) [user] subst_vars(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", ";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", [], [])
^  Call: (259) [user] subst_vars([1504, 0], _11936, [], _5960)
^  Unify: (259) [user] subst_vars([1504, 0], [1504, 0], [], [])
   Call: (260) [system] var([1504, 0])
^  Redo: (259) [user] subst_vars([1504, 0], _11936, [], _5960)
^  Unify: (259) [user] subst_vars([1504, 0], [_27806|_27808], [], _5960)
^  Call: (260) [user] subst_vars(1504, _27806, [], _28746)
^  Unify: (260) [user] subst_vars(1504, 1504, [], [])
   Call: (261) [system] var(1504)
^  Redo: (260) [user] subst_vars(1504, _27806, [], _28746)
^  Unify: (260) [user] subst_vars(1504, _27806, [], _28746)
   Call: (261) [system] atom(1504)
^  Redo: (260) [user] subst_vars(1504, _27806, [], _28746)
^  Unify: (260) [user] subst_vars(1504, _27806, [], _28746)
   Call: (261) [system] compound(1504)
^  Redo: (260) [user] subst_vars(1504, _27806, [], _28746)
^  Unify: (260) [user] subst_vars(1504, 1504, [], [])
^  Exit: (260) [user] subst_vars(1504, 1504, [], [])
^  Call: (260) [user] subst_vars([0], _27808, [], _5960)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _27808, [], _5960)
^  Unify: (260) [user] subst_vars([0], [_43678|_43680], [], _5960)
^  Call: (261) [user] subst_vars(0, _43678, [], _44618)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _43678, [], _44618)
^  Unify: (261) [user] subst_vars(0, _43678, [], _44618)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _43678, [], _44618)
^  Unify: (261) [user] subst_vars(0, _43678, [], _44618)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _43678, [], _44618)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _43680, [], _5960)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _43680, [], _5960)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1504, 0], [1504, 0], [], [])
^  Exit: (258) [user] subst_vars([";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0], [";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5958, '$COMMENT', [";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT', [";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), [], [])
   Call: (257) [system] _67036=metta_file_buffer(+, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;               (let $sv (input $x) $st))\"), Ok(vec![vec![expr!(\"output\" (\"input\" x))]]));", 1504, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1505, 0, 54179, '$COMMENT'(";;    }", 1505, 0), '$stream_position'(54179, 1505, 0, 54213)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1505, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1505, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    }", 1505, 0), _119754))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1505, 0), _119754))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    }", 1505, 0), _119754)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1505, 0), _119754)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1505, 0), _119754)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1505, 0), _119754)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    }", 1505, 0), _125366))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1505, 0), _125366))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1505, 0), _125366))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1505, 0), _125366))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1505, 0), _125366)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1505, 0), _125366)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    }", 1505, 0), _130952))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1505, 0), _130952))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    }", 1505, 0), _130952)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1505, 0), _130952)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1505, 0), _130952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1505, 0), _130952)
   Call: (270) [system] var('$COMMENT'(";;    }", 1505, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1505, 0), _130952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1505, 0), '$VAR'(_138412))
   Call: (270) [system] atom('$COMMENT'(";;    }", 1505, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1505, 0), _130952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1505, 0), _130952)
   Call: (270) [system] '$COMMENT'(";;    }", 1505, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1505, 0), _130952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1505, 0), _130952)
   Call: (270) [system] '$COMMENT'(";;    }", 1505, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1505, 0), _130952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1505, 0), _130952)
   Call: (270) [system] '$COMMENT'(";;    }", 1505, 0)==[_147692, _147698]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1505, 0), _130952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1505, 0), _130952)
   Call: (270) [system] is_list('$COMMENT'(";;    }", 1505, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1505, 0), _130952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1505, 0), _130952)
   Call: (270) [system] string('$COMMENT'(";;    }", 1505, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1505, 0), _130952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1505, 0), _130952)
   Call: (270) [system] compound('$COMMENT'(";;    }", 1505, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    }", 1505, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1505, 0), _157894, _157896)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1505, 0), '$COMMENT', [";;    }", 1505, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    }", 1505, 0], _161636)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1505, 0], _161636)
   Call: (271) [apply] apply:maplist_([";;    }", 1505, 0], _161636, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    }", 1505, 0], [_164454|_164456], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    }", _164454)
^  Unify: (272) [user] mfix_vars1(";;    }", _164454)
   Call: (273) [system] var(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _164454)
^  Unify: (272) [user] mfix_vars1(";;    }", '$VAR'(_169100))
   Call: (273) [system] atom(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _164454)
^  Unify: (272) [user] mfix_vars1(";;    }", _164454)
   Call: (273) [system] ";;    }"==true
^  Redo: (272) [user] mfix_vars1(";;    }", _164454)
^  Unify: (272) [user] mfix_vars1(";;    }", _164454)
   Call: (273) [system] ";;    }"==false
^  Redo: (272) [user] mfix_vars1(";;    }", _164454)
^  Unify: (272) [user] mfix_vars1(";;    }", _164454)
   Call: (273) [system] ";;    }"==[_178380, _178386]
^  Redo: (272) [user] mfix_vars1(";;    }", _164454)
^  Unify: (272) [user] mfix_vars1(";;    }", _164454)
   Call: (273) [system] is_list(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _164454)
^  Unify: (272) [user] mfix_vars1(";;    }", _164454)
   Call: (273) [system] string(";;    }")
   Exit: (273) [system] string(";;    }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    }", _164454)
^  Unify: (272) [user] mfix_vars1(";;    }", _164454)
   Call: (273) [system] compound(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _164454)
^  Unify: (272) [user] mfix_vars1(";;    }", _164454)
^  Call: (273) [user] symbol(";;    }")
^  Unify: (273) [user] symbol(";;    }")
   Call: (274) [system] atom(";;    }")
   Fail: (274) [system] atom(";;    }")
^  Fail: (273) [user] symbol(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _164454)
   Call: (273) [system] ";;    }"=_164454
   Exit: (273) [system] ";;    }"=";;    }"
^  Exit: (272) [user] mfix_vars1(";;    }", ";;    }")
   Call: (272) [apply] apply:maplist_([1505, 0], _164456, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1505, 0], [_202452|_202454], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1505, _202452)
^  Unify: (273) [user] mfix_vars1(1505, _202452)
   Call: (274) [system] var(1505)
^  Redo: (273) [user] mfix_vars1(1505, _202452)
^  Unify: (273) [user] mfix_vars1(1505, '$VAR'(_207098))
   Call: (274) [system] atom(1505)
^  Redo: (273) [user] mfix_vars1(1505, _202452)
^  Unify: (273) [user] mfix_vars1(1505, _202452)
   Call: (274) [system] 1505==true
^  Redo: (273) [user] mfix_vars1(1505, _202452)
^  Unify: (273) [user] mfix_vars1(1505, _202452)
   Call: (274) [system] 1505==false
^  Redo: (273) [user] mfix_vars1(1505, _202452)
^  Unify: (273) [user] mfix_vars1(1505, _202452)
   Call: (274) [system] 1505==[_216378, _216384]
^  Redo: (273) [user] mfix_vars1(1505, _202452)
^  Unify: (273) [user] mfix_vars1(1505, _202452)
   Call: (274) [system] is_list(1505)
^  Redo: (273) [user] mfix_vars1(1505, _202452)
^  Unify: (273) [user] mfix_vars1(1505, _202452)
   Call: (274) [system] string(1505)
^  Redo: (273) [user] mfix_vars1(1505, _202452)
^  Unify: (273) [user] mfix_vars1(1505, _202452)
   Call: (274) [system] compound(1505)
^  Redo: (273) [user] mfix_vars1(1505, _202452)
^  Unify: (273) [user] mfix_vars1(1505, _202452)
^  Call: (274) [user] symbol(1505)
^  Unify: (274) [user] symbol(1505)
   Call: (275) [system] atom(1505)
   Fail: (275) [system] atom(1505)
^  Fail: (274) [user] symbol(1505)
^  Redo: (273) [user] mfix_vars1(1505, _202452)
   Call: (274) [system] 1505=_202452
   Exit: (274) [system] 1505=1505
^  Exit: (273) [user] mfix_vars1(1505, 1505)
   Call: (273) [apply] apply:maplist_([0], _202454, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_236778|_236780], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _236778)
^  Unify: (274) [user] mfix_vars1(0, _236778)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _236778)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_241424))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _236778)
^  Unify: (274) [user] mfix_vars1(0, _236778)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _236778)
^  Unify: (274) [user] mfix_vars1(0, _236778)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _236778)
^  Unify: (274) [user] mfix_vars1(0, _236778)
   Call: (275) [system] 0==[_250704, _250710]
^  Redo: (274) [user] mfix_vars1(0, _236778)
^  Unify: (274) [user] mfix_vars1(0, _236778)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _236778)
^  Unify: (274) [user] mfix_vars1(0, _236778)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _236778)
^  Unify: (274) [user] mfix_vars1(0, _236778)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _236778)
^  Unify: (274) [user] mfix_vars1(0, _236778)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _236778)
   Call: (275) [system] 0=_236778
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _236780, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1505, 0], [1505, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    }", 1505, 0], [";;    }", 1505, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1505, 0], [";;    }", 1505, 0])
   Call: (270) [system] compound_name_arguments(_130952, '$COMMENT', [";;    }", 1505, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1505, 0), '$COMMENT', [";;    }", 1505, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1505, 0)\=@='$COMMENT'(";;    }", 1505, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1505, 0), _125366)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    }", 1505, 0), _286952))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1505, 0), _286952))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1505, 0), _286952))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1505, 0), _286952))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1505, 0), _286952)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1505, 0), _286952)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    }", 1505, 0), _292538))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1505, 0), _292538))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    }", 1505, 0), _292538)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1505, 0), _292538)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    }", 1505, 0), _292538)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1505, 0)\=@='$COMMENT'(";;    }", 1505, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1505, 0), _286952)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    }", 1505, 0), _119754))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1505, 0), _119754))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1505, 0), _119754))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1505, 0), _119754))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1505, 0), _119754)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1505, 0), _119754)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    }", 1505, 0), _314858))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1505, 0), _314858))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    }", 1505, 0), _314858)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1505, 0), _314858)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    }", 1505, 0), _314858)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1505, 0)\=@='$COMMENT'(";;    }", 1505, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1505, 0), _119754)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0)))
   Call: (261) [system] '$COMMENT'(";;    }", 1505, 0)\=@='$COMMENT'(";;    }", 1505, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1505, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1505, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1505, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1505, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1505, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    }", 1505, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    }", 1505, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    }", 1505, 0), _343636, [], _343638)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    }", 1505, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1505, 0), _343636, [], _343638)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1505, 0), _343636, [], _343638)
   Call: (258) [system] atom('$COMMENT'(";;    }", 1505, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1505, 0), _343636, [], _343638)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1505, 0), _343636, [], _343638)
   Call: (258) [system] compound('$COMMENT'(";;    }", 1505, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    }", 1505, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1505, 0), _352952, _352954)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1505, 0), '$COMMENT', [";;    }", 1505, 0])
^  Call: (258) [user] subst_vars([";;    }", 1505, 0], _354838, [], _343638)
^  Unify: (258) [user] subst_vars([";;    }", 1505, 0], [";;    }", 1505, 0], [], [])
   Call: (259) [system] var([";;    }", 1505, 0])
^  Redo: (258) [user] subst_vars([";;    }", 1505, 0], _354838, [], _343638)
^  Unify: (258) [user] subst_vars([";;    }", 1505, 0], [_358574|_358576], [], _343638)
^  Call: (259) [user] subst_vars(";;    }", _358574, [], _359514)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
   Call: (260) [system] var(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _358574, [], _359514)
^  Unify: (259) [user] subst_vars(";;    }", _358574, [], _359514)
   Call: (260) [system] atom(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _358574, [], _359514)
^  Unify: (259) [user] subst_vars(";;    }", _358574, [], _359514)
   Call: (260) [system] compound(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _358574, [], _359514)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Exit: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Call: (259) [user] subst_vars([1505, 0], _358576, [], _343638)
^  Unify: (259) [user] subst_vars([1505, 0], [1505, 0], [], [])
   Call: (260) [system] var([1505, 0])
^  Redo: (259) [user] subst_vars([1505, 0], _358576, [], _343638)
^  Unify: (259) [user] subst_vars([1505, 0], [_374446|_374448], [], _343638)
^  Call: (260) [user] subst_vars(1505, _374446, [], _375386)
^  Unify: (260) [user] subst_vars(1505, 1505, [], [])
   Call: (261) [system] var(1505)
^  Redo: (260) [user] subst_vars(1505, _374446, [], _375386)
^  Unify: (260) [user] subst_vars(1505, _374446, [], _375386)
   Call: (261) [system] atom(1505)
^  Redo: (260) [user] subst_vars(1505, _374446, [], _375386)
^  Unify: (260) [user] subst_vars(1505, _374446, [], _375386)
   Call: (261) [system] compound(1505)
^  Redo: (260) [user] subst_vars(1505, _374446, [], _375386)
^  Unify: (260) [user] subst_vars(1505, 1505, [], [])
^  Exit: (260) [user] subst_vars(1505, 1505, [], [])
^  Call: (260) [user] subst_vars([0], _374448, [], _343638)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _374448, [], _343638)
^  Unify: (260) [user] subst_vars([0], [_390318|_390320], [], _343638)
^  Call: (261) [user] subst_vars(0, _390318, [], _391258)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _390318, [], _391258)
^  Unify: (261) [user] subst_vars(0, _390318, [], _391258)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _390318, [], _391258)
^  Unify: (261) [user] subst_vars(0, _390318, [], _391258)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _390318, [], _391258)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _390320, [], _343638)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _390320, [], _343638)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1505, 0], [1505, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    }", 1505, 0], [";;    }", 1505, 0], [], [])
   Call: (258) [system] compound_name_arguments(_343636, '$COMMENT', [";;    }", 1505, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1505, 0), '$COMMENT', [";;    }", 1505, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    }", 1505, 0), '$COMMENT'(";;    }", 1505, 0), [], [])
   Call: (257) [system] _413676=metta_file_buffer(+, '$COMMENT'(";;    }", 1505, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    }", 1505, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    }", 1505, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1505, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1505, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1505, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1505, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1505, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1505, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1506, 0, 54187, '$COMMENT'(";; Converted:", 1506, 0), '$stream_position'(54187, 1506, 0, 54221)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1506, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1506, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1506, 0), _466394))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1506, 0), _466394))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1506, 0), _466394)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1506, 0), _466394)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1506, 0), _466394)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1506, 0), _466394)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1506, 0), _472006))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1506, 0), _472006))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1506, 0), _472006))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1506, 0), _472006))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1506, 0), _472006)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1506, 0), _472006)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1506, 0), _477592))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1506, 0), _477592))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1506, 0), _477592)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1506, 0), _477592)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1506, 0), _477592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1506, 0), _477592)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1506, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1506, 0), _477592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1506, 0), '$VAR'(_485052))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1506, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1506, 0), _477592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1506, 0), _477592)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1506, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1506, 0), _477592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1506, 0), _477592)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1506, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1506, 0), _477592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1506, 0), _477592)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1506, 0)==[_494332, _494338]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1506, 0), _477592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1506, 0), _477592)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1506, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1506, 0), _477592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1506, 0), _477592)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1506, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1506, 0), _477592)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1506, 0), _477592)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1506, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1506, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1506, 0), _504534, _504536)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1506, 0), '$COMMENT', [";; Converted:", 1506, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1506, 0], _508276)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1506, 0], _508276)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1506, 0], _508276, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1506, 0], [_511094|_511096], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _511094)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _511094)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _511094)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_515740))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _511094)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _511094)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _511094)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _511094)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _511094)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _6024)
   Call: (273) [system] ";; Converted:"==[_6916, _6922]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _6024)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _6024)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _6024)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _6024)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _6024)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _6024)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _6024)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _6024)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _6024)
   Call: (273) [system] ";; Converted:"=_6024
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1506, 0], _6026, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1506, 0], [_30988|_30990], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1506, _30988)
^  Unify: (273) [user] mfix_vars1(1506, _30988)
   Call: (274) [system] var(1506)
^  Redo: (273) [user] mfix_vars1(1506, _30988)
^  Unify: (273) [user] mfix_vars1(1506, '$VAR'(_35634))
   Call: (274) [system] atom(1506)
^  Redo: (273) [user] mfix_vars1(1506, _30988)
^  Unify: (273) [user] mfix_vars1(1506, _30988)
   Call: (274) [system] 1506==true
^  Redo: (273) [user] mfix_vars1(1506, _30988)
^  Unify: (273) [user] mfix_vars1(1506, _30988)
   Call: (274) [system] 1506==false
^  Redo: (273) [user] mfix_vars1(1506, _30988)
^  Unify: (273) [user] mfix_vars1(1506, _30988)
   Call: (274) [system] 1506==[_44914, _44920]
^  Redo: (273) [user] mfix_vars1(1506, _30988)
^  Unify: (273) [user] mfix_vars1(1506, _30988)
   Call: (274) [system] is_list(1506)
^  Redo: (273) [user] mfix_vars1(1506, _30988)
^  Unify: (273) [user] mfix_vars1(1506, _30988)
   Call: (274) [system] string(1506)
^  Redo: (273) [user] mfix_vars1(1506, _30988)
^  Unify: (273) [user] mfix_vars1(1506, _30988)
   Call: (274) [system] compound(1506)
^  Redo: (273) [user] mfix_vars1(1506, _30988)
^  Unify: (273) [user] mfix_vars1(1506, _30988)
^  Call: (274) [user] symbol(1506)
^  Unify: (274) [user] symbol(1506)
   Call: (275) [system] atom(1506)
   Fail: (275) [system] atom(1506)
^  Fail: (274) [user] symbol(1506)
^  Redo: (273) [user] mfix_vars1(1506, _30988)
   Call: (274) [system] 1506=_30988
   Exit: (274) [system] 1506=1506
^  Exit: (273) [user] mfix_vars1(1506, 1506)
   Call: (273) [apply] apply:maplist_([0], _30990, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_65314|_65316], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _65314)
^  Unify: (274) [user] mfix_vars1(0, _65314)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _65314)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_69960))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _65314)
^  Unify: (274) [user] mfix_vars1(0, _65314)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _65314)
^  Unify: (274) [user] mfix_vars1(0, _65314)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _65314)
^  Unify: (274) [user] mfix_vars1(0, _65314)
   Call: (275) [system] 0==[_79240, _79246]
^  Redo: (274) [user] mfix_vars1(0, _65314)
^  Unify: (274) [user] mfix_vars1(0, _65314)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _65314)
^  Unify: (274) [user] mfix_vars1(0, _65314)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _65314)
^  Unify: (274) [user] mfix_vars1(0, _65314)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _65314)
^  Unify: (274) [user] mfix_vars1(0, _65314)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _65314)
   Call: (275) [system] 0=_65314
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _65316, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1506, 0], [1506, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1506, 0], [";; Converted:", 1506, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1506, 0], [";; Converted:", 1506, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";; Converted:", 1506, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1506, 0), '$COMMENT', [";; Converted:", 1506, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1506, 0)\=@='$COMMENT'(";; Converted:", 1506, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1506, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1506, 0), _115488))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1506, 0), _115488))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1506, 0), _115488))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1506, 0), _115488))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1506, 0), _115488)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1506, 0), _115488)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1506, 0), _121074))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1506, 0), _121074))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1506, 0), _121074)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1506, 0), _121074)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1506, 0), _121074)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1506, 0)\=@='$COMMENT'(";; Converted:", 1506, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1506, 0), _115488)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1506, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1506, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1506, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1506, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1506, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1506, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1506, 0), _143394))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1506, 0), _143394))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1506, 0), _143394)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1506, 0), _143394)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1506, 0), _143394)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1506, 0)\=@='$COMMENT'(";; Converted:", 1506, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1506, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1506, 0)\=@='$COMMENT'(";; Converted:", 1506, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1506, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1506, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1506, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1506, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1506, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1506, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1506, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1506, 0), _172172, [], _172174)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1506, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1506, 0), _172172, [], _172174)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1506, 0), _172172, [], _172174)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1506, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1506, 0), _172172, [], _172174)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1506, 0), _172172, [], _172174)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1506, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1506, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1506, 0), _181488, _181490)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1506, 0), '$COMMENT', [";; Converted:", 1506, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1506, 0], _183374, [], _172174)
^  Unify: (258) [user] subst_vars([";; Converted:", 1506, 0], [";; Converted:", 1506, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1506, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1506, 0], _183374, [], _172174)
^  Unify: (258) [user] subst_vars([";; Converted:", 1506, 0], [_187110|_187112], [], _172174)
^  Call: (259) [user] subst_vars(";; Converted:", _187110, [], _188050)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _187110, [], _188050)
^  Unify: (259) [user] subst_vars(";; Converted:", _187110, [], _188050)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _187110, [], _188050)
^  Unify: (259) [user] subst_vars(";; Converted:", _187110, [], _188050)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _187110, [], _188050)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1506, 0], _187112, [], _172174)
^  Unify: (259) [user] subst_vars([1506, 0], [1506, 0], [], [])
   Call: (260) [system] var([1506, 0])
^  Redo: (259) [user] subst_vars([1506, 0], _187112, [], _172174)
^  Unify: (259) [user] subst_vars([1506, 0], [_202982|_202984], [], _172174)
^  Call: (260) [user] subst_vars(1506, _202982, [], _203922)
^  Unify: (260) [user] subst_vars(1506, 1506, [], [])
   Call: (261) [system] var(1506)
^  Redo: (260) [user] subst_vars(1506, _202982, [], _203922)
^  Unify: (260) [user] subst_vars(1506, _202982, [], _203922)
   Call: (261) [system] atom(1506)
^  Redo: (260) [user] subst_vars(1506, _202982, [], _203922)
^  Unify: (260) [user] subst_vars(1506, _202982, [], _203922)
   Call: (261) [system] compound(1506)
^  Redo: (260) [user] subst_vars(1506, _202982, [], _203922)
^  Unify: (260) [user] subst_vars(1506, 1506, [], [])
^  Exit: (260) [user] subst_vars(1506, 1506, [], [])
^  Call: (260) [user] subst_vars([0], _202984, [], _172174)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _202984, [], _172174)
^  Unify: (260) [user] subst_vars([0], [_218854|_218856], [], _172174)
^  Call: (261) [user] subst_vars(0, _218854, [], _219794)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _218854, [], _219794)
^  Unify: (261) [user] subst_vars(0, _218854, [], _219794)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _218854, [], _219794)
^  Unify: (261) [user] subst_vars(0, _218854, [], _219794)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _218854, [], _219794)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _218856, [], _172174)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _218856, [], _172174)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1506, 0], [1506, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1506, 0], [";; Converted:", 1506, 0], [], [])
   Call: (258) [system] compound_name_arguments(_172172, '$COMMENT', [";; Converted:", 1506, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1506, 0), '$COMMENT', [";; Converted:", 1506, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1506, 0), '$COMMENT'(";; Converted:", 1506, 0), [], [])
   Call: (257) [system] _242212=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1506, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1506, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1506, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1506, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1506, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1506, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1506, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1506, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1506, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1511, 0, 54407, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$stream_position'(54407, 1511, 0, 54441)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _294938))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _294938))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _294938)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _294938)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _294938)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _294938)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _300550))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _300550))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _300550))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _300550))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _300550)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _300550)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _306136))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _306136))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _306136)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _306136)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _306136)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _306136)
   Call: (270) [system] var('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _306136)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$VAR'(_313596))
   Call: (270) [system] atom('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _306136)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _306136)
   Call: (270) [system] '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _306136)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _306136)
   Call: (270) [system] '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _306136)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _306136)
   Call: (270) [system] '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0)==[_322876, _322882]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _306136)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _306136)
   Call: (270) [system] is_list('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _306136)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _306136)
   Call: (270) [system] string('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _306136)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _306136)
   Call: (270) [system] compound('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _333078, _333080)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT', [";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0], _336820)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0], _336820)
   Call: (271) [apply] apply:maplist_([";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0], _336820, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0], [_339638|_339640], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    #[derive(Clone, PartialEq, Debug)]", _339638)
^  Unify: (272) [user] mfix_vars1(";;    #[derive(Clone, PartialEq, Debug)]", _339638)
   Call: (273) [system] var(";;    #[derive(Clone, PartialEq, Debug)]")
^  Redo: (272) [user] mfix_vars1(";;    #[derive(Clone, PartialEq, Debug)]", _339638)
^  Unify: (272) [user] mfix_vars1(";;    #[derive(Clone, PartialEq, Debug)]", '$VAR'(_344284))
   Call: (273) [system] atom(";;    #[derive(Clone, PartialEq, Debug)]")
^  Redo: (272) [user] mfix_vars1(";;    #[derive(Clone, PartialEq, Debug)]", _339638)
^  Unify: (272) [user] mfix_vars1(";;    #[derive(Clone, PartialEq, Debug)]", _339638)
   Call: (273) [system] ";;    #[derive(Clone, PartialEq, Debug)]"==true
^  Redo: (272) [user] mfix_vars1(";;    #[derive(Clone, PartialEq, Debug)]", _339638)
^  Unify: (272) [user] mfix_vars1(";;    #[derive(Clone, PartialEq, Debug)]", _339638)
   Call: (273) [system] ";;    #[derive(Clone, PartialEq, Debug)]"==false
^  Redo: (272) [user] mfix_vars1(";;    #[derive(Clone, PartialEq, Debug)]", _339638)
^  Unify: (272) [user] mfix_vars1(";;    #[derive(Clone, PartialEq, Debug)]", _339638)
   Call: (273) [system] ";;    #[derive(Clone, PartialEq, Debug)]"==[_353564, _353570]
^  Redo: (272) [user] mfix_vars1(";;    #[derive(Clone, PartialEq, Debug)]", _339638)
^  Unify: (272) [user] mfix_vars1(";;    #[derive(Clone, PartialEq, Debug)]", _339638)
   Call: (273) [system] is_list(";;    #[derive(Clone, PartialEq, Debug)]")
^  Redo: (272) [user] mfix_vars1(";;    #[derive(Clone, PartialEq, Debug)]", _339638)
^  Unify: (272) [user] mfix_vars1(";;    #[derive(Clone, PartialEq, Debug)]", _339638)
   Call: (273) [system] string(";;    #[derive(Clone, PartialEq, Debug)]")
   Exit: (273) [system] string(";;    #[derive(Clone, PartialEq, Debug)]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    #[derive(Clone, PartialEq, Debug)]", _339638)
^  Unify: (272) [user] mfix_vars1(";;    #[derive(Clone, PartialEq, Debug)]", _339638)
   Call: (273) [system] compound(";;    #[derive(Clone, PartialEq, Debug)]")
^  Redo: (272) [user] mfix_vars1(";;    #[derive(Clone, PartialEq, Debug)]", _339638)
^  Unify: (272) [user] mfix_vars1(";;    #[derive(Clone, PartialEq, Debug)]", _339638)
^  Call: (273) [user] symbol(";;    #[derive(Clone, PartialEq, Debug)]")
^  Unify: (273) [user] symbol(";;    #[derive(Clone, PartialEq, Debug)]")
   Call: (274) [system] atom(";;    #[derive(Clone, PartialEq, Debug)]")
   Fail: (274) [system] atom(";;    #[derive(Clone, PartialEq, Debug)]")
^  Fail: (273) [user] symbol(";;    #[derive(Clone, PartialEq, Debug)]")
^  Redo: (272) [user] mfix_vars1(";;    #[derive(Clone, PartialEq, Debug)]", _339638)
   Call: (273) [system] ";;    #[derive(Clone, PartialEq, Debug)]"=_339638
   Exit: (273) [system] ";;    #[derive(Clone, PartialEq, Debug)]"=";;    #[derive(Clone, PartialEq, Debug)]"
^  Exit: (272) [user] mfix_vars1(";;    #[derive(Clone, PartialEq, Debug)]", ";;    #[derive(Clone, PartialEq, Debug)]")
   Call: (272) [apply] apply:maplist_([1511, 0], _339640, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1511, 0], [_377636|_377638], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1511, _377636)
^  Unify: (273) [user] mfix_vars1(1511, _377636)
   Call: (274) [system] var(1511)
^  Redo: (273) [user] mfix_vars1(1511, _377636)
^  Unify: (273) [user] mfix_vars1(1511, '$VAR'(_382282))
   Call: (274) [system] atom(1511)
^  Redo: (273) [user] mfix_vars1(1511, _377636)
^  Unify: (273) [user] mfix_vars1(1511, _377636)
   Call: (274) [system] 1511==true
^  Redo: (273) [user] mfix_vars1(1511, _377636)
^  Unify: (273) [user] mfix_vars1(1511, _377636)
   Call: (274) [system] 1511==false
^  Redo: (273) [user] mfix_vars1(1511, _377636)
^  Unify: (273) [user] mfix_vars1(1511, _377636)
   Call: (274) [system] 1511==[_391562, _391568]
^  Redo: (273) [user] mfix_vars1(1511, _377636)
^  Unify: (273) [user] mfix_vars1(1511, _377636)
   Call: (274) [system] is_list(1511)
^  Redo: (273) [user] mfix_vars1(1511, _377636)
^  Unify: (273) [user] mfix_vars1(1511, _377636)
   Call: (274) [system] string(1511)
^  Redo: (273) [user] mfix_vars1(1511, _377636)
^  Unify: (273) [user] mfix_vars1(1511, _377636)
   Call: (274) [system] compound(1511)
^  Redo: (273) [user] mfix_vars1(1511, _377636)
^  Unify: (273) [user] mfix_vars1(1511, _377636)
^  Call: (274) [user] symbol(1511)
^  Unify: (274) [user] symbol(1511)
   Call: (275) [system] atom(1511)
   Fail: (275) [system] atom(1511)
^  Fail: (274) [user] symbol(1511)
^  Redo: (273) [user] mfix_vars1(1511, _377636)
   Call: (274) [system] 1511=_377636
   Exit: (274) [system] 1511=1511
^  Exit: (273) [user] mfix_vars1(1511, 1511)
   Call: (273) [apply] apply:maplist_([0], _377638, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_411962|_411964], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _411962)
^  Unify: (274) [user] mfix_vars1(0, _411962)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _411962)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_416608))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _411962)
^  Unify: (274) [user] mfix_vars1(0, _411962)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _411962)
^  Unify: (274) [user] mfix_vars1(0, _411962)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _411962)
^  Unify: (274) [user] mfix_vars1(0, _411962)
   Call: (275) [system] 0==[_425888, _425894]
^  Redo: (274) [user] mfix_vars1(0, _411962)
^  Unify: (274) [user] mfix_vars1(0, _411962)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _411962)
^  Unify: (274) [user] mfix_vars1(0, _411962)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _411962)
^  Unify: (274) [user] mfix_vars1(0, _411962)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _411962)
^  Unify: (274) [user] mfix_vars1(0, _411962)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _411962)
   Call: (275) [system] 0=_411962
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _411964, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1511, 0], [1511, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0], [";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0], [";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0])
   Call: (270) [system] compound_name_arguments(_306136, '$COMMENT', [";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT', [";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0)\=@='$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _300550)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _462136))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _462136))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _462136))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _462136))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _462136)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _462136)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _467722))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _467722))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _467722)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _467722)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _467722)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0)\=@='$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _462136)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _294938))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _294938))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _294938))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _294938))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _294938)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _294938)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _490042))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _490042))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _490042)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _490042)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _490042)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0)))
   Call: (267) [system] '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0)\=@='$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _294938)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0)))
   Call: (261) [system] '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0)\=@='$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _518820, [], _518822)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _518820, [], _518822)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _518820, [], _518822)
   Call: (258) [system] atom('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _5946, [], _5948)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _5946, [], _5948)
   Call: (258) [system] compound('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), _10196, _10198)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT', [";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0])
^  Call: (258) [user] subst_vars([";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0], _12082, [], _5948)
^  Unify: (258) [user] subst_vars([";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0], [";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0], [], [])
   Call: (259) [system] var([";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0])
^  Redo: (258) [user] subst_vars([";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0], _12082, [], _5948)
^  Unify: (258) [user] subst_vars([";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0], [_15818|_15820], [], _5948)
^  Call: (259) [user] subst_vars(";;    #[derive(Clone, PartialEq, Debug)]", _15818, [], _16758)
^  Unify: (259) [user] subst_vars(";;    #[derive(Clone, PartialEq, Debug)]", ";;    #[derive(Clone, PartialEq, Debug)]", [], [])
   Call: (260) [system] var(";;    #[derive(Clone, PartialEq, Debug)]")
^  Redo: (259) [user] subst_vars(";;    #[derive(Clone, PartialEq, Debug)]", _15818, [], _16758)
^  Unify: (259) [user] subst_vars(";;    #[derive(Clone, PartialEq, Debug)]", _15818, [], _16758)
   Call: (260) [system] atom(";;    #[derive(Clone, PartialEq, Debug)]")
^  Redo: (259) [user] subst_vars(";;    #[derive(Clone, PartialEq, Debug)]", _15818, [], _16758)
^  Unify: (259) [user] subst_vars(";;    #[derive(Clone, PartialEq, Debug)]", _15818, [], _16758)
   Call: (260) [system] compound(";;    #[derive(Clone, PartialEq, Debug)]")
^  Redo: (259) [user] subst_vars(";;    #[derive(Clone, PartialEq, Debug)]", _15818, [], _16758)
^  Unify: (259) [user] subst_vars(";;    #[derive(Clone, PartialEq, Debug)]", ";;    #[derive(Clone, PartialEq, Debug)]", [], [])
^  Exit: (259) [user] subst_vars(";;    #[derive(Clone, PartialEq, Debug)]", ";;    #[derive(Clone, PartialEq, Debug)]", [], [])
^  Call: (259) [user] subst_vars([1511, 0], _15820, [], _5948)
^  Unify: (259) [user] subst_vars([1511, 0], [1511, 0], [], [])
   Call: (260) [system] var([1511, 0])
^  Redo: (259) [user] subst_vars([1511, 0], _15820, [], _5948)
^  Unify: (259) [user] subst_vars([1511, 0], [_31690|_31692], [], _5948)
^  Call: (260) [user] subst_vars(1511, _31690, [], _32630)
^  Unify: (260) [user] subst_vars(1511, 1511, [], [])
   Call: (261) [system] var(1511)
^  Redo: (260) [user] subst_vars(1511, _31690, [], _32630)
^  Unify: (260) [user] subst_vars(1511, _31690, [], _32630)
   Call: (261) [system] atom(1511)
^  Redo: (260) [user] subst_vars(1511, _31690, [], _32630)
^  Unify: (260) [user] subst_vars(1511, _31690, [], _32630)
   Call: (261) [system] compound(1511)
^  Redo: (260) [user] subst_vars(1511, _31690, [], _32630)
^  Unify: (260) [user] subst_vars(1511, 1511, [], [])
^  Exit: (260) [user] subst_vars(1511, 1511, [], [])
^  Call: (260) [user] subst_vars([0], _31692, [], _5948)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _31692, [], _5948)
^  Unify: (260) [user] subst_vars([0], [_47562|_47564], [], _5948)
^  Call: (261) [user] subst_vars(0, _47562, [], _48502)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _47562, [], _48502)
^  Unify: (261) [user] subst_vars(0, _47562, [], _48502)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _47562, [], _48502)
^  Unify: (261) [user] subst_vars(0, _47562, [], _48502)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _47562, [], _48502)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _47564, [], _5948)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _47564, [], _5948)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1511, 0], [1511, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0], [";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5946, '$COMMENT', [";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT', [";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), [], [])
   Call: (257) [system] _70920=metta_file_buffer(+, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    #[derive(Clone, PartialEq, Debug)]", 1511, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1512, 0, 54448, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$stream_position'(54448, 1512, 0, 54482)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _123644))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _123644))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _123644)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _123644)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _123644)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _123644)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _129256))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _129256))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _129256))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _129256))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _129256)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _129256)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _134842))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _134842))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _134842)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _134842)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _134842)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _134842)
   Call: (270) [system] var('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _134842)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$VAR'(_142302))
   Call: (270) [system] atom('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _134842)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _134842)
   Call: (270) [system] '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _134842)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _134842)
   Call: (270) [system] '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _134842)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _134842)
   Call: (270) [system] '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0)==[_151582, _151588]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _134842)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _134842)
   Call: (270) [system] is_list('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _134842)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _134842)
   Call: (270) [system] string('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _134842)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _134842)
   Call: (270) [system] compound('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _161784, _161786)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT', [";;    pub struct SomeGndAtom { }", 1512, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    pub struct SomeGndAtom { }", 1512, 0], _165526)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    pub struct SomeGndAtom { }", 1512, 0], _165526)
   Call: (271) [apply] apply:maplist_([";;    pub struct SomeGndAtom { }", 1512, 0], _165526, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    pub struct SomeGndAtom { }", 1512, 0], [_168344|_168346], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    pub struct SomeGndAtom { }", _168344)
^  Unify: (272) [user] mfix_vars1(";;    pub struct SomeGndAtom { }", _168344)
   Call: (273) [system] var(";;    pub struct SomeGndAtom { }")
^  Redo: (272) [user] mfix_vars1(";;    pub struct SomeGndAtom { }", _168344)
^  Unify: (272) [user] mfix_vars1(";;    pub struct SomeGndAtom { }", '$VAR'(_172990))
   Call: (273) [system] atom(";;    pub struct SomeGndAtom { }")
^  Redo: (272) [user] mfix_vars1(";;    pub struct SomeGndAtom { }", _168344)
^  Unify: (272) [user] mfix_vars1(";;    pub struct SomeGndAtom { }", _168344)
   Call: (273) [system] ";;    pub struct SomeGndAtom { }"==true
^  Redo: (272) [user] mfix_vars1(";;    pub struct SomeGndAtom { }", _168344)
^  Unify: (272) [user] mfix_vars1(";;    pub struct SomeGndAtom { }", _168344)
   Call: (273) [system] ";;    pub struct SomeGndAtom { }"==false
^  Redo: (272) [user] mfix_vars1(";;    pub struct SomeGndAtom { }", _168344)
^  Unify: (272) [user] mfix_vars1(";;    pub struct SomeGndAtom { }", _168344)
   Call: (273) [system] ";;    pub struct SomeGndAtom { }"==[_182270, _182276]
^  Redo: (272) [user] mfix_vars1(";;    pub struct SomeGndAtom { }", _168344)
^  Unify: (272) [user] mfix_vars1(";;    pub struct SomeGndAtom { }", _168344)
   Call: (273) [system] is_list(";;    pub struct SomeGndAtom { }")
^  Redo: (272) [user] mfix_vars1(";;    pub struct SomeGndAtom { }", _168344)
^  Unify: (272) [user] mfix_vars1(";;    pub struct SomeGndAtom { }", _168344)
   Call: (273) [system] string(";;    pub struct SomeGndAtom { }")
   Exit: (273) [system] string(";;    pub struct SomeGndAtom { }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    pub struct SomeGndAtom { }", _168344)
^  Unify: (272) [user] mfix_vars1(";;    pub struct SomeGndAtom { }", _168344)
   Call: (273) [system] compound(";;    pub struct SomeGndAtom { }")
^  Redo: (272) [user] mfix_vars1(";;    pub struct SomeGndAtom { }", _168344)
^  Unify: (272) [user] mfix_vars1(";;    pub struct SomeGndAtom { }", _168344)
^  Call: (273) [user] symbol(";;    pub struct SomeGndAtom { }")
^  Unify: (273) [user] symbol(";;    pub struct SomeGndAtom { }")
   Call: (274) [system] atom(";;    pub struct SomeGndAtom { }")
   Fail: (274) [system] atom(";;    pub struct SomeGndAtom { }")
^  Fail: (273) [user] symbol(";;    pub struct SomeGndAtom { }")
^  Redo: (272) [user] mfix_vars1(";;    pub struct SomeGndAtom { }", _168344)
   Call: (273) [system] ";;    pub struct SomeGndAtom { }"=_168344
   Exit: (273) [system] ";;    pub struct SomeGndAtom { }"=";;    pub struct SomeGndAtom { }"
^  Exit: (272) [user] mfix_vars1(";;    pub struct SomeGndAtom { }", ";;    pub struct SomeGndAtom { }")
   Call: (272) [apply] apply:maplist_([1512, 0], _168346, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1512, 0], [_206342|_206344], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1512, _206342)
^  Unify: (273) [user] mfix_vars1(1512, _206342)
   Call: (274) [system] var(1512)
^  Redo: (273) [user] mfix_vars1(1512, _206342)
^  Unify: (273) [user] mfix_vars1(1512, '$VAR'(_210988))
   Call: (274) [system] atom(1512)
^  Redo: (273) [user] mfix_vars1(1512, _206342)
^  Unify: (273) [user] mfix_vars1(1512, _206342)
   Call: (274) [system] 1512==true
^  Redo: (273) [user] mfix_vars1(1512, _206342)
^  Unify: (273) [user] mfix_vars1(1512, _206342)
   Call: (274) [system] 1512==false
^  Redo: (273) [user] mfix_vars1(1512, _206342)
^  Unify: (273) [user] mfix_vars1(1512, _206342)
   Call: (274) [system] 1512==[_220268, _220274]
^  Redo: (273) [user] mfix_vars1(1512, _206342)
^  Unify: (273) [user] mfix_vars1(1512, _206342)
   Call: (274) [system] is_list(1512)
^  Redo: (273) [user] mfix_vars1(1512, _206342)
^  Unify: (273) [user] mfix_vars1(1512, _206342)
   Call: (274) [system] string(1512)
^  Redo: (273) [user] mfix_vars1(1512, _206342)
^  Unify: (273) [user] mfix_vars1(1512, _206342)
   Call: (274) [system] compound(1512)
^  Redo: (273) [user] mfix_vars1(1512, _206342)
^  Unify: (273) [user] mfix_vars1(1512, _206342)
^  Call: (274) [user] symbol(1512)
^  Unify: (274) [user] symbol(1512)
   Call: (275) [system] atom(1512)
   Fail: (275) [system] atom(1512)
^  Fail: (274) [user] symbol(1512)
^  Redo: (273) [user] mfix_vars1(1512, _206342)
   Call: (274) [system] 1512=_206342
   Exit: (274) [system] 1512=1512
^  Exit: (273) [user] mfix_vars1(1512, 1512)
   Call: (273) [apply] apply:maplist_([0], _206344, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_240668|_240670], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _240668)
^  Unify: (274) [user] mfix_vars1(0, _240668)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _240668)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_245314))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _240668)
^  Unify: (274) [user] mfix_vars1(0, _240668)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _240668)
^  Unify: (274) [user] mfix_vars1(0, _240668)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _240668)
^  Unify: (274) [user] mfix_vars1(0, _240668)
   Call: (275) [system] 0==[_254594, _254600]
^  Redo: (274) [user] mfix_vars1(0, _240668)
^  Unify: (274) [user] mfix_vars1(0, _240668)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _240668)
^  Unify: (274) [user] mfix_vars1(0, _240668)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _240668)
^  Unify: (274) [user] mfix_vars1(0, _240668)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _240668)
^  Unify: (274) [user] mfix_vars1(0, _240668)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _240668)
   Call: (275) [system] 0=_240668
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _240670, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1512, 0], [1512, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    pub struct SomeGndAtom { }", 1512, 0], [";;    pub struct SomeGndAtom { }", 1512, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    pub struct SomeGndAtom { }", 1512, 0], [";;    pub struct SomeGndAtom { }", 1512, 0])
   Call: (270) [system] compound_name_arguments(_134842, '$COMMENT', [";;    pub struct SomeGndAtom { }", 1512, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT', [";;    pub struct SomeGndAtom { }", 1512, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0)))
   Call: (267) [system] '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0)\=@='$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _129256)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _290842))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _290842))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _290842))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _290842))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _290842)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _290842)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _296428))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _296428))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _296428)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _296428)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _296428)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0)))
   Call: (267) [system] '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0)\=@='$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _290842)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _123644))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _123644))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _123644))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _123644))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _123644)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _123644)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _318748))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _318748))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _318748)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _318748)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _318748)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0)))
   Call: (267) [system] '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0)\=@='$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _123644)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0)))
   Call: (261) [system] '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0)\=@='$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _347526, [], _347528)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _347526, [], _347528)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _347526, [], _347528)
   Call: (258) [system] atom('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _347526, [], _347528)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _347526, [], _347528)
   Call: (258) [system] compound('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), _356842, _356844)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT', [";;    pub struct SomeGndAtom { }", 1512, 0])
^  Call: (258) [user] subst_vars([";;    pub struct SomeGndAtom { }", 1512, 0], _358728, [], _347528)
^  Unify: (258) [user] subst_vars([";;    pub struct SomeGndAtom { }", 1512, 0], [";;    pub struct SomeGndAtom { }", 1512, 0], [], [])
   Call: (259) [system] var([";;    pub struct SomeGndAtom { }", 1512, 0])
^  Redo: (258) [user] subst_vars([";;    pub struct SomeGndAtom { }", 1512, 0], _358728, [], _347528)
^  Unify: (258) [user] subst_vars([";;    pub struct SomeGndAtom { }", 1512, 0], [_362464|_362466], [], _347528)
^  Call: (259) [user] subst_vars(";;    pub struct SomeGndAtom { }", _362464, [], _363404)
^  Unify: (259) [user] subst_vars(";;    pub struct SomeGndAtom { }", ";;    pub struct SomeGndAtom { }", [], [])
   Call: (260) [system] var(";;    pub struct SomeGndAtom { }")
^  Redo: (259) [user] subst_vars(";;    pub struct SomeGndAtom { }", _362464, [], _363404)
^  Unify: (259) [user] subst_vars(";;    pub struct SomeGndAtom { }", _362464, [], _363404)
   Call: (260) [system] atom(";;    pub struct SomeGndAtom { }")
^  Redo: (259) [user] subst_vars(";;    pub struct SomeGndAtom { }", _362464, [], _363404)
^  Unify: (259) [user] subst_vars(";;    pub struct SomeGndAtom { }", _362464, [], _363404)
   Call: (260) [system] compound(";;    pub struct SomeGndAtom { }")
^  Redo: (259) [user] subst_vars(";;    pub struct SomeGndAtom { }", _362464, [], _363404)
^  Unify: (259) [user] subst_vars(";;    pub struct SomeGndAtom { }", ";;    pub struct SomeGndAtom { }", [], [])
^  Exit: (259) [user] subst_vars(";;    pub struct SomeGndAtom { }", ";;    pub struct SomeGndAtom { }", [], [])
^  Call: (259) [user] subst_vars([1512, 0], _362466, [], _347528)
^  Unify: (259) [user] subst_vars([1512, 0], [1512, 0], [], [])
   Call: (260) [system] var([1512, 0])
^  Redo: (259) [user] subst_vars([1512, 0], _362466, [], _347528)
^  Unify: (259) [user] subst_vars([1512, 0], [_378336|_378338], [], _347528)
^  Call: (260) [user] subst_vars(1512, _378336, [], _379276)
^  Unify: (260) [user] subst_vars(1512, 1512, [], [])
   Call: (261) [system] var(1512)
^  Redo: (260) [user] subst_vars(1512, _378336, [], _379276)
^  Unify: (260) [user] subst_vars(1512, _378336, [], _379276)
   Call: (261) [system] atom(1512)
^  Redo: (260) [user] subst_vars(1512, _378336, [], _379276)
^  Unify: (260) [user] subst_vars(1512, _378336, [], _379276)
   Call: (261) [system] compound(1512)
^  Redo: (260) [user] subst_vars(1512, _378336, [], _379276)
^  Unify: (260) [user] subst_vars(1512, 1512, [], [])
^  Exit: (260) [user] subst_vars(1512, 1512, [], [])
^  Call: (260) [user] subst_vars([0], _378338, [], _347528)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _378338, [], _347528)
^  Unify: (260) [user] subst_vars([0], [_394208|_394210], [], _347528)
^  Call: (261) [user] subst_vars(0, _394208, [], _395148)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _394208, [], _395148)
^  Unify: (261) [user] subst_vars(0, _394208, [], _395148)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _394208, [], _395148)
^  Unify: (261) [user] subst_vars(0, _394208, [], _395148)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _394208, [], _395148)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _394210, [], _347528)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _394210, [], _347528)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1512, 0], [1512, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    pub struct SomeGndAtom { }", 1512, 0], [";;    pub struct SomeGndAtom { }", 1512, 0], [], [])
   Call: (258) [system] compound_name_arguments(_347526, '$COMMENT', [";;    pub struct SomeGndAtom { }", 1512, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT', [";;    pub struct SomeGndAtom { }", 1512, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), [], [])
   Call: (257) [system] _417566=metta_file_buffer(+, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    pub struct SomeGndAtom { }", 1512, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1513, 0, 54481, '$COMMENT'(";;", 1513, 0), '$stream_position'(54481, 1513, 0, 54515)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1513, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1513, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1513, 0), _470282))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1513, 0), _470282))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1513, 0), _470282)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1513, 0), _470282)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1513, 0), _470282)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1513, 0), _470282)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1513, 0), _475894))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1513, 0), _475894))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1513, 0), _475894))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1513, 0), _475894))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1513, 0), _475894)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1513, 0), _475894)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1513, 0), _481480))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1513, 0), _481480))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1513, 0), _481480)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1513, 0), _481480)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1513, 0), _481480)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1513, 0), _481480)
   Call: (270) [system] var('$COMMENT'(";;", 1513, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1513, 0), _481480)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1513, 0), '$VAR'(_488940))
   Call: (270) [system] atom('$COMMENT'(";;", 1513, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1513, 0), _481480)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1513, 0), _481480)
   Call: (270) [system] '$COMMENT'(";;", 1513, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1513, 0), _481480)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1513, 0), _481480)
   Call: (270) [system] '$COMMENT'(";;", 1513, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1513, 0), _481480)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1513, 0), _481480)
   Call: (270) [system] '$COMMENT'(";;", 1513, 0)==[_498220, _498226]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1513, 0), _481480)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1513, 0), _481480)
   Call: (270) [system] is_list('$COMMENT'(";;", 1513, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1513, 0), _481480)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1513, 0), _481480)
   Call: (270) [system] string('$COMMENT'(";;", 1513, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1513, 0), _481480)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1513, 0), _481480)
   Call: (270) [system] compound('$COMMENT'(";;", 1513, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1513, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1513, 0), _508422, _508424)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1513, 0), '$COMMENT', [";;", 1513, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1513, 0], _512164)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1513, 0], _512164)
   Call: (271) [apply] apply:maplist_([";;", 1513, 0], _512164, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1513, 0], [_514982|_514984], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _514982)
^  Unify: (272) [user] mfix_vars1(";;", _514982)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _514982)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_519628))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _514982)
^  Unify: (272) [user] mfix_vars1(";;", _514982)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] ";;"==[_11020, _11026]
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] ";;"=_6022
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1513, 0], _6024, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1513, 0], [_35092|_35094], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1513, _35092)
^  Unify: (273) [user] mfix_vars1(1513, _35092)
   Call: (274) [system] var(1513)
^  Redo: (273) [user] mfix_vars1(1513, _35092)
^  Unify: (273) [user] mfix_vars1(1513, '$VAR'(_39738))
   Call: (274) [system] atom(1513)
^  Redo: (273) [user] mfix_vars1(1513, _35092)
^  Unify: (273) [user] mfix_vars1(1513, _35092)
   Call: (274) [system] 1513==true
^  Redo: (273) [user] mfix_vars1(1513, _35092)
^  Unify: (273) [user] mfix_vars1(1513, _35092)
   Call: (274) [system] 1513==false
^  Redo: (273) [user] mfix_vars1(1513, _35092)
^  Unify: (273) [user] mfix_vars1(1513, _35092)
   Call: (274) [system] 1513==[_49018, _49024]
^  Redo: (273) [user] mfix_vars1(1513, _35092)
^  Unify: (273) [user] mfix_vars1(1513, _35092)
   Call: (274) [system] is_list(1513)
^  Redo: (273) [user] mfix_vars1(1513, _35092)
^  Unify: (273) [user] mfix_vars1(1513, _35092)
   Call: (274) [system] string(1513)
^  Redo: (273) [user] mfix_vars1(1513, _35092)
^  Unify: (273) [user] mfix_vars1(1513, _35092)
   Call: (274) [system] compound(1513)
^  Redo: (273) [user] mfix_vars1(1513, _35092)
^  Unify: (273) [user] mfix_vars1(1513, _35092)
^  Call: (274) [user] symbol(1513)
^  Unify: (274) [user] symbol(1513)
   Call: (275) [system] atom(1513)
   Fail: (275) [system] atom(1513)
^  Fail: (274) [user] symbol(1513)
^  Redo: (273) [user] mfix_vars1(1513, _35092)
   Call: (274) [system] 1513=_35092
   Exit: (274) [system] 1513=1513
^  Exit: (273) [user] mfix_vars1(1513, 1513)
   Call: (273) [apply] apply:maplist_([0], _35094, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_69418|_69420], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _69418)
^  Unify: (274) [user] mfix_vars1(0, _69418)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _69418)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_74064))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _69418)
^  Unify: (274) [user] mfix_vars1(0, _69418)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _69418)
^  Unify: (274) [user] mfix_vars1(0, _69418)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _69418)
^  Unify: (274) [user] mfix_vars1(0, _69418)
   Call: (275) [system] 0==[_83344, _83350]
^  Redo: (274) [user] mfix_vars1(0, _69418)
^  Unify: (274) [user] mfix_vars1(0, _69418)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _69418)
^  Unify: (274) [user] mfix_vars1(0, _69418)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _69418)
^  Unify: (274) [user] mfix_vars1(0, _69418)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _69418)
^  Unify: (274) [user] mfix_vars1(0, _69418)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _69418)
   Call: (275) [system] 0=_69418
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _69420, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1513, 0], [1513, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1513, 0], [";;", 1513, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1513, 0], [";;", 1513, 0])
   Call: (270) [system] compound_name_arguments(_5976, '$COMMENT', [";;", 1513, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1513, 0), '$COMMENT', [";;", 1513, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1513, 0)\=@='$COMMENT'(";;", 1513, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1513, 0), _5962)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1513, 0), _119592))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1513, 0), _119592))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1513, 0), _119592))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1513, 0), _119592))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1513, 0), _119592)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1513, 0), _119592)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1513, 0), _125178))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1513, 0), _125178))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1513, 0), _125178)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1513, 0), _125178)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1513, 0), _125178)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1513, 0)\=@='$COMMENT'(";;", 1513, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1513, 0), _119592)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1513, 0), _5942))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1513, 0), _5942))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1513, 0), _5942))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1513, 0), _5942))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1513, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1513, 0), _5942)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1513, 0), _147498))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1513, 0), _147498))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1513, 0), _147498)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1513, 0), _147498)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1513, 0), _147498)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1513, 0)\=@='$COMMENT'(";;", 1513, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1513, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1513, 0)\=@='$COMMENT'(";;", 1513, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1513, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1513, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1513, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1513, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1513, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1513, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1513, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1513, 0), _176276, [], _176278)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1513, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1513, 0), _176276, [], _176278)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1513, 0), _176276, [], _176278)
   Call: (258) [system] atom('$COMMENT'(";;", 1513, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1513, 0), _176276, [], _176278)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1513, 0), _176276, [], _176278)
   Call: (258) [system] compound('$COMMENT'(";;", 1513, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1513, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1513, 0), _185592, _185594)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1513, 0), '$COMMENT', [";;", 1513, 0])
^  Call: (258) [user] subst_vars([";;", 1513, 0], _187478, [], _176278)
^  Unify: (258) [user] subst_vars([";;", 1513, 0], [";;", 1513, 0], [], [])
   Call: (259) [system] var([";;", 1513, 0])
^  Redo: (258) [user] subst_vars([";;", 1513, 0], _187478, [], _176278)
^  Unify: (258) [user] subst_vars([";;", 1513, 0], [_191214|_191216], [], _176278)
^  Call: (259) [user] subst_vars(";;", _191214, [], _192154)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _191214, [], _192154)
^  Unify: (259) [user] subst_vars(";;", _191214, [], _192154)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _191214, [], _192154)
^  Unify: (259) [user] subst_vars(";;", _191214, [], _192154)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _191214, [], _192154)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1513, 0], _191216, [], _176278)
^  Unify: (259) [user] subst_vars([1513, 0], [1513, 0], [], [])
   Call: (260) [system] var([1513, 0])
^  Redo: (259) [user] subst_vars([1513, 0], _191216, [], _176278)
^  Unify: (259) [user] subst_vars([1513, 0], [_207086|_207088], [], _176278)
^  Call: (260) [user] subst_vars(1513, _207086, [], _208026)
^  Unify: (260) [user] subst_vars(1513, 1513, [], [])
   Call: (261) [system] var(1513)
^  Redo: (260) [user] subst_vars(1513, _207086, [], _208026)
^  Unify: (260) [user] subst_vars(1513, _207086, [], _208026)
   Call: (261) [system] atom(1513)
^  Redo: (260) [user] subst_vars(1513, _207086, [], _208026)
^  Unify: (260) [user] subst_vars(1513, _207086, [], _208026)
   Call: (261) [system] compound(1513)
^  Redo: (260) [user] subst_vars(1513, _207086, [], _208026)
^  Unify: (260) [user] subst_vars(1513, 1513, [], [])
^  Exit: (260) [user] subst_vars(1513, 1513, [], [])
^  Call: (260) [user] subst_vars([0], _207088, [], _176278)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _207088, [], _176278)
^  Unify: (260) [user] subst_vars([0], [_222958|_222960], [], _176278)
^  Call: (261) [user] subst_vars(0, _222958, [], _223898)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _222958, [], _223898)
^  Unify: (261) [user] subst_vars(0, _222958, [], _223898)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _222958, [], _223898)
^  Unify: (261) [user] subst_vars(0, _222958, [], _223898)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _222958, [], _223898)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _222960, [], _176278)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _222960, [], _176278)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1513, 0], [1513, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1513, 0], [";;", 1513, 0], [], [])
   Call: (258) [system] compound_name_arguments(_176276, '$COMMENT', [";;", 1513, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1513, 0), '$COMMENT', [";;", 1513, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1513, 0), '$COMMENT'(";;", 1513, 0), [], [])
   Call: (257) [system] _246316=metta_file_buffer(+, '$COMMENT'(";;", 1513, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1513, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1513, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1513, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1513, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1513, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1513, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1513, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1513, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1514, 0, 54484, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$stream_position'(54484, 1514, 0, 54518)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _299040))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _299040))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _299040)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _299040)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _299040)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _299040)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _304652))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _304652))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _304652))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _304652))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _304652)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _304652)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _310238))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _310238))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _310238)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _310238)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _310238)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _310238)
   Call: (270) [system] var('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _310238)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$VAR'(_317698))
   Call: (270) [system] atom('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _310238)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _310238)
   Call: (270) [system] '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _310238)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _310238)
   Call: (270) [system] '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _310238)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _310238)
   Call: (270) [system] '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0)==[_326978, _326984]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _310238)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _310238)
   Call: (270) [system] is_list('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _310238)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _310238)
   Call: (270) [system] string('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _310238)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _310238)
   Call: (270) [system] compound('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _337180, _337182)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT', [";;    impl Display for SomeGndAtom {", 1514, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    impl Display for SomeGndAtom {", 1514, 0], _340922)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    impl Display for SomeGndAtom {", 1514, 0], _340922)
   Call: (271) [apply] apply:maplist_([";;    impl Display for SomeGndAtom {", 1514, 0], _340922, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    impl Display for SomeGndAtom {", 1514, 0], [_343740|_343742], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    impl Display for SomeGndAtom {", _343740)
^  Unify: (272) [user] mfix_vars1(";;    impl Display for SomeGndAtom {", _343740)
   Call: (273) [system] var(";;    impl Display for SomeGndAtom {")
^  Redo: (272) [user] mfix_vars1(";;    impl Display for SomeGndAtom {", _343740)
^  Unify: (272) [user] mfix_vars1(";;    impl Display for SomeGndAtom {", '$VAR'(_348386))
   Call: (273) [system] atom(";;    impl Display for SomeGndAtom {")
^  Redo: (272) [user] mfix_vars1(";;    impl Display for SomeGndAtom {", _343740)
^  Unify: (272) [user] mfix_vars1(";;    impl Display for SomeGndAtom {", _343740)
   Call: (273) [system] ";;    impl Display for SomeGndAtom {"==true
^  Redo: (272) [user] mfix_vars1(";;    impl Display for SomeGndAtom {", _343740)
^  Unify: (272) [user] mfix_vars1(";;    impl Display for SomeGndAtom {", _343740)
   Call: (273) [system] ";;    impl Display for SomeGndAtom {"==false
^  Redo: (272) [user] mfix_vars1(";;    impl Display for SomeGndAtom {", _343740)
^  Unify: (272) [user] mfix_vars1(";;    impl Display for SomeGndAtom {", _343740)
   Call: (273) [system] ";;    impl Display for SomeGndAtom {"==[_357666, _357672]
^  Redo: (272) [user] mfix_vars1(";;    impl Display for SomeGndAtom {", _343740)
^  Unify: (272) [user] mfix_vars1(";;    impl Display for SomeGndAtom {", _343740)
   Call: (273) [system] is_list(";;    impl Display for SomeGndAtom {")
^  Redo: (272) [user] mfix_vars1(";;    impl Display for SomeGndAtom {", _343740)
^  Unify: (272) [user] mfix_vars1(";;    impl Display for SomeGndAtom {", _343740)
   Call: (273) [system] string(";;    impl Display for SomeGndAtom {")
   Exit: (273) [system] string(";;    impl Display for SomeGndAtom {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    impl Display for SomeGndAtom {", _343740)
^  Unify: (272) [user] mfix_vars1(";;    impl Display for SomeGndAtom {", _343740)
   Call: (273) [system] compound(";;    impl Display for SomeGndAtom {")
^  Redo: (272) [user] mfix_vars1(";;    impl Display for SomeGndAtom {", _343740)
^  Unify: (272) [user] mfix_vars1(";;    impl Display for SomeGndAtom {", _343740)
^  Call: (273) [user] symbol(";;    impl Display for SomeGndAtom {")
^  Unify: (273) [user] symbol(";;    impl Display for SomeGndAtom {")
   Call: (274) [system] atom(";;    impl Display for SomeGndAtom {")
   Fail: (274) [system] atom(";;    impl Display for SomeGndAtom {")
^  Fail: (273) [user] symbol(";;    impl Display for SomeGndAtom {")
^  Redo: (272) [user] mfix_vars1(";;    impl Display for SomeGndAtom {", _343740)
   Call: (273) [system] ";;    impl Display for SomeGndAtom {"=_343740
   Exit: (273) [system] ";;    impl Display for SomeGndAtom {"=";;    impl Display for SomeGndAtom {"
^  Exit: (272) [user] mfix_vars1(";;    impl Display for SomeGndAtom {", ";;    impl Display for SomeGndAtom {")
   Call: (272) [apply] apply:maplist_([1514, 0], _343742, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1514, 0], [_381738|_381740], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1514, _381738)
^  Unify: (273) [user] mfix_vars1(1514, _381738)
   Call: (274) [system] var(1514)
^  Redo: (273) [user] mfix_vars1(1514, _381738)
^  Unify: (273) [user] mfix_vars1(1514, '$VAR'(_386384))
   Call: (274) [system] atom(1514)
^  Redo: (273) [user] mfix_vars1(1514, _381738)
^  Unify: (273) [user] mfix_vars1(1514, _381738)
   Call: (274) [system] 1514==true
^  Redo: (273) [user] mfix_vars1(1514, _381738)
^  Unify: (273) [user] mfix_vars1(1514, _381738)
   Call: (274) [system] 1514==false
^  Redo: (273) [user] mfix_vars1(1514, _381738)
^  Unify: (273) [user] mfix_vars1(1514, _381738)
   Call: (274) [system] 1514==[_395664, _395670]
^  Redo: (273) [user] mfix_vars1(1514, _381738)
^  Unify: (273) [user] mfix_vars1(1514, _381738)
   Call: (274) [system] is_list(1514)
^  Redo: (273) [user] mfix_vars1(1514, _381738)
^  Unify: (273) [user] mfix_vars1(1514, _381738)
   Call: (274) [system] string(1514)
^  Redo: (273) [user] mfix_vars1(1514, _381738)
^  Unify: (273) [user] mfix_vars1(1514, _381738)
   Call: (274) [system] compound(1514)
^  Redo: (273) [user] mfix_vars1(1514, _381738)
^  Unify: (273) [user] mfix_vars1(1514, _381738)
^  Call: (274) [user] symbol(1514)
^  Unify: (274) [user] symbol(1514)
   Call: (275) [system] atom(1514)
   Fail: (275) [system] atom(1514)
^  Fail: (274) [user] symbol(1514)
^  Redo: (273) [user] mfix_vars1(1514, _381738)
   Call: (274) [system] 1514=_381738
   Exit: (274) [system] 1514=1514
^  Exit: (273) [user] mfix_vars1(1514, 1514)
   Call: (273) [apply] apply:maplist_([0], _381740, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_416064|_416066], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _416064)
^  Unify: (274) [user] mfix_vars1(0, _416064)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _416064)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_420710))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _416064)
^  Unify: (274) [user] mfix_vars1(0, _416064)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _416064)
^  Unify: (274) [user] mfix_vars1(0, _416064)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _416064)
^  Unify: (274) [user] mfix_vars1(0, _416064)
   Call: (275) [system] 0==[_429990, _429996]
^  Redo: (274) [user] mfix_vars1(0, _416064)
^  Unify: (274) [user] mfix_vars1(0, _416064)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _416064)
^  Unify: (274) [user] mfix_vars1(0, _416064)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _416064)
^  Unify: (274) [user] mfix_vars1(0, _416064)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _416064)
^  Unify: (274) [user] mfix_vars1(0, _416064)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _416064)
   Call: (275) [system] 0=_416064
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _416066, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1514, 0], [1514, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    impl Display for SomeGndAtom {", 1514, 0], [";;    impl Display for SomeGndAtom {", 1514, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    impl Display for SomeGndAtom {", 1514, 0], [";;    impl Display for SomeGndAtom {", 1514, 0])
   Call: (270) [system] compound_name_arguments(_310238, '$COMMENT', [";;    impl Display for SomeGndAtom {", 1514, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT', [";;    impl Display for SomeGndAtom {", 1514, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0)))
   Call: (267) [system] '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0)\=@='$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _304652)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _466238))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _466238))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _466238))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _466238))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _466238)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _466238)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _471824))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _471824))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _471824)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _471824)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _471824)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0)))
   Call: (267) [system] '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0)\=@='$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _466238)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _299040))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _299040))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _299040))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _299040))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _299040)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _299040)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _494144))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _494144))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _494144)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _494144)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _494144)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0)))
   Call: (267) [system] '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0)\=@='$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _299040)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0)))
   Call: (261) [system] '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0)\=@='$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _522922, [], _522924)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _5944, [], _5946)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _5944, [], _5946)
   Call: (258) [system] atom('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _5944, [], _5946)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _5944, [], _5946)
   Call: (258) [system] compound('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), _14184, _14186)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT', [";;    impl Display for SomeGndAtom {", 1514, 0])
^  Call: (258) [user] subst_vars([";;    impl Display for SomeGndAtom {", 1514, 0], _16070, [], _5946)
^  Unify: (258) [user] subst_vars([";;    impl Display for SomeGndAtom {", 1514, 0], [";;    impl Display for SomeGndAtom {", 1514, 0], [], [])
   Call: (259) [system] var([";;    impl Display for SomeGndAtom {", 1514, 0])
^  Redo: (258) [user] subst_vars([";;    impl Display for SomeGndAtom {", 1514, 0], _16070, [], _5946)
^  Unify: (258) [user] subst_vars([";;    impl Display for SomeGndAtom {", 1514, 0], [_19806|_19808], [], _5946)
^  Call: (259) [user] subst_vars(";;    impl Display for SomeGndAtom {", _19806, [], _20746)
^  Unify: (259) [user] subst_vars(";;    impl Display for SomeGndAtom {", ";;    impl Display for SomeGndAtom {", [], [])
   Call: (260) [system] var(";;    impl Display for SomeGndAtom {")
^  Redo: (259) [user] subst_vars(";;    impl Display for SomeGndAtom {", _19806, [], _20746)
^  Unify: (259) [user] subst_vars(";;    impl Display for SomeGndAtom {", _19806, [], _20746)
   Call: (260) [system] atom(";;    impl Display for SomeGndAtom {")
^  Redo: (259) [user] subst_vars(";;    impl Display for SomeGndAtom {", _19806, [], _20746)
^  Unify: (259) [user] subst_vars(";;    impl Display for SomeGndAtom {", _19806, [], _20746)
   Call: (260) [system] compound(";;    impl Display for SomeGndAtom {")
^  Redo: (259) [user] subst_vars(";;    impl Display for SomeGndAtom {", _19806, [], _20746)
^  Unify: (259) [user] subst_vars(";;    impl Display for SomeGndAtom {", ";;    impl Display for SomeGndAtom {", [], [])
^  Exit: (259) [user] subst_vars(";;    impl Display for SomeGndAtom {", ";;    impl Display for SomeGndAtom {", [], [])
^  Call: (259) [user] subst_vars([1514, 0], _19808, [], _5946)
^  Unify: (259) [user] subst_vars([1514, 0], [1514, 0], [], [])
   Call: (260) [system] var([1514, 0])
^  Redo: (259) [user] subst_vars([1514, 0], _19808, [], _5946)
^  Unify: (259) [user] subst_vars([1514, 0], [_35678|_35680], [], _5946)
^  Call: (260) [user] subst_vars(1514, _35678, [], _36618)
^  Unify: (260) [user] subst_vars(1514, 1514, [], [])
   Call: (261) [system] var(1514)
^  Redo: (260) [user] subst_vars(1514, _35678, [], _36618)
^  Unify: (260) [user] subst_vars(1514, _35678, [], _36618)
   Call: (261) [system] atom(1514)
^  Redo: (260) [user] subst_vars(1514, _35678, [], _36618)
^  Unify: (260) [user] subst_vars(1514, _35678, [], _36618)
   Call: (261) [system] compound(1514)
^  Redo: (260) [user] subst_vars(1514, _35678, [], _36618)
^  Unify: (260) [user] subst_vars(1514, 1514, [], [])
^  Exit: (260) [user] subst_vars(1514, 1514, [], [])
^  Call: (260) [user] subst_vars([0], _35680, [], _5946)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _35680, [], _5946)
^  Unify: (260) [user] subst_vars([0], [_51550|_51552], [], _5946)
^  Call: (261) [user] subst_vars(0, _51550, [], _52490)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _51550, [], _52490)
^  Unify: (261) [user] subst_vars(0, _51550, [], _52490)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _51550, [], _52490)
^  Unify: (261) [user] subst_vars(0, _51550, [], _52490)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _51550, [], _52490)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _51552, [], _5946)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _51552, [], _5946)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1514, 0], [1514, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    impl Display for SomeGndAtom {", 1514, 0], [";;    impl Display for SomeGndAtom {", 1514, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5944, '$COMMENT', [";;    impl Display for SomeGndAtom {", 1514, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT', [";;    impl Display for SomeGndAtom {", 1514, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), [], [])
   Call: (257) [system] _74908=metta_file_buffer(+, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    impl Display for SomeGndAtom {", 1514, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1515, 0, 54521, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$stream_position'(54521, 1515, 0, 54555)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _127642))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _127642))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _127642)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _127642)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _127642)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _127642)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _133254))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _133254))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _133254))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _133254))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _133254)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _133254)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _138840))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _138840))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _138840)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _138840)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _138840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _138840)
   Call: (270) [system] var('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _138840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$VAR'(_146300))
   Call: (270) [system] atom('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _138840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _138840)
   Call: (270) [system] '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _138840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _138840)
   Call: (270) [system] '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _138840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _138840)
   Call: (270) [system] '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0)==[_155580, _155586]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _138840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _138840)
   Call: (270) [system] is_list('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _138840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _138840)
   Call: (270) [system] string('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _138840)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _138840)
   Call: (270) [system] compound('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _165782, _165784)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT', [";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0], _169524)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0], _169524)
   Call: (271) [apply] apply:maplist_([";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0], _169524, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0], [_172342|_172344], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _172342)
^  Unify: (272) [user] mfix_vars1(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _172342)
   Call: (273) [system] var(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {")
^  Redo: (272) [user] mfix_vars1(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _172342)
^  Unify: (272) [user] mfix_vars1(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", '$VAR'(_176988))
   Call: (273) [system] atom(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {")
^  Redo: (272) [user] mfix_vars1(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _172342)
^  Unify: (272) [user] mfix_vars1(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _172342)
   Call: (273) [system] ";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {"==true
^  Redo: (272) [user] mfix_vars1(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _172342)
^  Unify: (272) [user] mfix_vars1(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _172342)
   Call: (273) [system] ";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {"==false
^  Redo: (272) [user] mfix_vars1(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _172342)
^  Unify: (272) [user] mfix_vars1(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _172342)
   Call: (273) [system] ";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {"==[_186268, _186274]
^  Redo: (272) [user] mfix_vars1(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _172342)
^  Unify: (272) [user] mfix_vars1(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _172342)
   Call: (273) [system] is_list(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {")
^  Redo: (272) [user] mfix_vars1(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _172342)
^  Unify: (272) [user] mfix_vars1(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _172342)
   Call: (273) [system] string(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {")
   Exit: (273) [system] string(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _172342)
^  Unify: (272) [user] mfix_vars1(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _172342)
   Call: (273) [system] compound(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {")
^  Redo: (272) [user] mfix_vars1(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _172342)
^  Unify: (272) [user] mfix_vars1(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _172342)
^  Call: (273) [user] symbol(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {")
^  Unify: (273) [user] symbol(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {")
   Call: (274) [system] atom(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {")
   Fail: (274) [system] atom(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {")
^  Fail: (273) [user] symbol(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {")
^  Redo: (272) [user] mfix_vars1(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _172342)
   Call: (273) [system] ";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {"=_172342
   Exit: (273) [system] ";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {"=";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {"
^  Exit: (272) [user] mfix_vars1(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", ";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {")
   Call: (272) [apply] apply:maplist_([1515, 0], _172344, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1515, 0], [_210340|_210342], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1515, _210340)
^  Unify: (273) [user] mfix_vars1(1515, _210340)
   Call: (274) [system] var(1515)
^  Redo: (273) [user] mfix_vars1(1515, _210340)
^  Unify: (273) [user] mfix_vars1(1515, '$VAR'(_214986))
   Call: (274) [system] atom(1515)
^  Redo: (273) [user] mfix_vars1(1515, _210340)
^  Unify: (273) [user] mfix_vars1(1515, _210340)
   Call: (274) [system] 1515==true
^  Redo: (273) [user] mfix_vars1(1515, _210340)
^  Unify: (273) [user] mfix_vars1(1515, _210340)
   Call: (274) [system] 1515==false
^  Redo: (273) [user] mfix_vars1(1515, _210340)
^  Unify: (273) [user] mfix_vars1(1515, _210340)
   Call: (274) [system] 1515==[_224266, _224272]
^  Redo: (273) [user] mfix_vars1(1515, _210340)
^  Unify: (273) [user] mfix_vars1(1515, _210340)
   Call: (274) [system] is_list(1515)
^  Redo: (273) [user] mfix_vars1(1515, _210340)
^  Unify: (273) [user] mfix_vars1(1515, _210340)
   Call: (274) [system] string(1515)
^  Redo: (273) [user] mfix_vars1(1515, _210340)
^  Unify: (273) [user] mfix_vars1(1515, _210340)
   Call: (274) [system] compound(1515)
^  Redo: (273) [user] mfix_vars1(1515, _210340)
^  Unify: (273) [user] mfix_vars1(1515, _210340)
^  Call: (274) [user] symbol(1515)
^  Unify: (274) [user] symbol(1515)
   Call: (275) [system] atom(1515)
   Fail: (275) [system] atom(1515)
^  Fail: (274) [user] symbol(1515)
^  Redo: (273) [user] mfix_vars1(1515, _210340)
   Call: (274) [system] 1515=_210340
   Exit: (274) [system] 1515=1515
^  Exit: (273) [user] mfix_vars1(1515, 1515)
   Call: (273) [apply] apply:maplist_([0], _210342, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_244666|_244668], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _244666)
^  Unify: (274) [user] mfix_vars1(0, _244666)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _244666)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_249312))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _244666)
^  Unify: (274) [user] mfix_vars1(0, _244666)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _244666)
^  Unify: (274) [user] mfix_vars1(0, _244666)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _244666)
^  Unify: (274) [user] mfix_vars1(0, _244666)
   Call: (275) [system] 0==[_258592, _258598]
^  Redo: (274) [user] mfix_vars1(0, _244666)
^  Unify: (274) [user] mfix_vars1(0, _244666)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _244666)
^  Unify: (274) [user] mfix_vars1(0, _244666)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _244666)
^  Unify: (274) [user] mfix_vars1(0, _244666)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _244666)
^  Unify: (274) [user] mfix_vars1(0, _244666)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _244666)
   Call: (275) [system] 0=_244666
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _244668, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1515, 0], [1515, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0], [";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0], [";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0])
   Call: (270) [system] compound_name_arguments(_138840, '$COMMENT', [";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT', [";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0)))
   Call: (267) [system] '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0)\=@='$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _133254)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _294840))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _294840))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _294840))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _294840))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _294840)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _294840)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _300426))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _300426))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _300426)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _300426)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _300426)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0)))
   Call: (267) [system] '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0)\=@='$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _294840)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _127642))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _127642))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _127642))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _127642))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _127642)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _127642)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _322746))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _322746))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _322746)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _322746)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _322746)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0)))
   Call: (267) [system] '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0)\=@='$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _127642)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0)))
   Call: (261) [system] '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0)\=@='$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _351524, [], _351526)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _351524, [], _351526)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _351524, [], _351526)
   Call: (258) [system] atom('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _351524, [], _351526)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _351524, [], _351526)
   Call: (258) [system] compound('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), _360840, _360842)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT', [";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0])
^  Call: (258) [user] subst_vars([";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0], _362726, [], _351526)
^  Unify: (258) [user] subst_vars([";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0], [";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0], [], [])
   Call: (259) [system] var([";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0])
^  Redo: (258) [user] subst_vars([";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0], _362726, [], _351526)
^  Unify: (258) [user] subst_vars([";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0], [_366462|_366464], [], _351526)
^  Call: (259) [user] subst_vars(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _366462, [], _367402)
^  Unify: (259) [user] subst_vars(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", ";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", [], [])
   Call: (260) [system] var(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {")
^  Redo: (259) [user] subst_vars(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _366462, [], _367402)
^  Unify: (259) [user] subst_vars(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _366462, [], _367402)
   Call: (260) [system] atom(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {")
^  Redo: (259) [user] subst_vars(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _366462, [], _367402)
^  Unify: (259) [user] subst_vars(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _366462, [], _367402)
   Call: (260) [system] compound(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {")
^  Redo: (259) [user] subst_vars(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", _366462, [], _367402)
^  Unify: (259) [user] subst_vars(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", ";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", [], [])
^  Exit: (259) [user] subst_vars(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", ";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", [], [])
^  Call: (259) [user] subst_vars([1515, 0], _366464, [], _351526)
^  Unify: (259) [user] subst_vars([1515, 0], [1515, 0], [], [])
   Call: (260) [system] var([1515, 0])
^  Redo: (259) [user] subst_vars([1515, 0], _366464, [], _351526)
^  Unify: (259) [user] subst_vars([1515, 0], [_382334|_382336], [], _351526)
^  Call: (260) [user] subst_vars(1515, _382334, [], _383274)
^  Unify: (260) [user] subst_vars(1515, 1515, [], [])
   Call: (261) [system] var(1515)
^  Redo: (260) [user] subst_vars(1515, _382334, [], _383274)
^  Unify: (260) [user] subst_vars(1515, _382334, [], _383274)
   Call: (261) [system] atom(1515)
^  Redo: (260) [user] subst_vars(1515, _382334, [], _383274)
^  Unify: (260) [user] subst_vars(1515, _382334, [], _383274)
   Call: (261) [system] compound(1515)
^  Redo: (260) [user] subst_vars(1515, _382334, [], _383274)
^  Unify: (260) [user] subst_vars(1515, 1515, [], [])
^  Exit: (260) [user] subst_vars(1515, 1515, [], [])
^  Call: (260) [user] subst_vars([0], _382336, [], _351526)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _382336, [], _351526)
^  Unify: (260) [user] subst_vars([0], [_398206|_398208], [], _351526)
^  Call: (261) [user] subst_vars(0, _398206, [], _399146)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _398206, [], _399146)
^  Unify: (261) [user] subst_vars(0, _398206, [], _399146)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _398206, [], _399146)
^  Unify: (261) [user] subst_vars(0, _398206, [], _399146)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _398206, [], _399146)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _398208, [], _351526)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _398208, [], _351526)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1515, 0], [1515, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0], [";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0], [], [])
   Call: (258) [system] compound_name_arguments(_351524, '$COMMENT', [";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT', [";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), [], [])
   Call: (257) [system] _421564=metta_file_buffer(+, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {", 1515, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1516, 0, 54600, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$stream_position'(54600, 1516, 0, 54634)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _474290))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _474290))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _474290)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _474290)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _474290)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _474290)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _479902))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _479902))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _479902))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _479902))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _479902)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _479902)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _485488))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _485488))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _485488)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _485488)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _485488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _485488)
   Call: (270) [system] var('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _485488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$VAR'(_492948))
   Call: (270) [system] atom('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _485488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _485488)
   Call: (270) [system] '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _485488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _485488)
   Call: (270) [system] '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _485488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _485488)
   Call: (270) [system] '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0)==[_502228, _502234]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _485488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _485488)
   Call: (270) [system] is_list('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _485488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _485488)
   Call: (270) [system] string('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _485488)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _485488)
   Call: (270) [system] compound('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _512430, _512432)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT', [";;            write!(f, \"some-gnd-atom\")", 1516, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            write!(f, \"some-gnd-atom\")", 1516, 0], _516172)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            write!(f, \"some-gnd-atom\")", 1516, 0], _516172)
   Call: (271) [apply] apply:maplist_([";;            write!(f, \"some-gnd-atom\")", 1516, 0], _516172, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            write!(f, \"some-gnd-atom\")", 1516, 0], [_518990|_518992], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            write!(f, \"some-gnd-atom\")", _518990)
^  Unify: (272) [user] mfix_vars1(";;            write!(f, \"some-gnd-atom\")", _518990)
   Call: (273) [system] var(";;            write!(f, \"some-gnd-atom\")")
^  Redo: (272) [user] mfix_vars1(";;            write!(f, \"some-gnd-atom\")", _518990)
^  Unify: (272) [user] mfix_vars1(";;            write!(f, \"some-gnd-atom\")", '$VAR'(_6040))
   Call: (273) [system] atom(";;            write!(f, \"some-gnd-atom\")")
^  Redo: (272) [user] mfix_vars1(";;            write!(f, \"some-gnd-atom\")", _6032)
^  Unify: (272) [user] mfix_vars1(";;            write!(f, \"some-gnd-atom\")", _6032)
   Call: (273) [system] ";;            write!(f, \"some-gnd-atom\")"==true
^  Redo: (272) [user] mfix_vars1(";;            write!(f, \"some-gnd-atom\")", _6032)
^  Unify: (272) [user] mfix_vars1(";;            write!(f, \"some-gnd-atom\")", _6032)
   Call: (273) [system] ";;            write!(f, \"some-gnd-atom\")"==false
^  Redo: (272) [user] mfix_vars1(";;            write!(f, \"some-gnd-atom\")", _6032)
^  Unify: (272) [user] mfix_vars1(";;            write!(f, \"some-gnd-atom\")", _6032)
   Call: (273) [system] ";;            write!(f, \"some-gnd-atom\")"==[_15024, _15030]
^  Redo: (272) [user] mfix_vars1(";;            write!(f, \"some-gnd-atom\")", _6032)
^  Unify: (272) [user] mfix_vars1(";;            write!(f, \"some-gnd-atom\")", _6032)
   Call: (273) [system] is_list(";;            write!(f, \"some-gnd-atom\")")
^  Redo: (272) [user] mfix_vars1(";;            write!(f, \"some-gnd-atom\")", _6032)
^  Unify: (272) [user] mfix_vars1(";;            write!(f, \"some-gnd-atom\")", _6032)
   Call: (273) [system] string(";;            write!(f, \"some-gnd-atom\")")
   Exit: (273) [system] string(";;            write!(f, \"some-gnd-atom\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            write!(f, \"some-gnd-atom\")", _6032)
^  Unify: (272) [user] mfix_vars1(";;            write!(f, \"some-gnd-atom\")", _6032)
   Call: (273) [system] compound(";;            write!(f, \"some-gnd-atom\")")
^  Redo: (272) [user] mfix_vars1(";;            write!(f, \"some-gnd-atom\")", _6032)
^  Unify: (272) [user] mfix_vars1(";;            write!(f, \"some-gnd-atom\")", _6032)
^  Call: (273) [user] symbol(";;            write!(f, \"some-gnd-atom\")")
^  Unify: (273) [user] symbol(";;            write!(f, \"some-gnd-atom\")")
   Call: (274) [system] atom(";;            write!(f, \"some-gnd-atom\")")
   Fail: (274) [system] atom(";;            write!(f, \"some-gnd-atom\")")
^  Fail: (273) [user] symbol(";;            write!(f, \"some-gnd-atom\")")
^  Redo: (272) [user] mfix_vars1(";;            write!(f, \"some-gnd-atom\")", _6032)
   Call: (273) [system] ";;            write!(f, \"some-gnd-atom\")"=_6032
   Exit: (273) [system] ";;            write!(f, \"some-gnd-atom\")"=";;            write!(f, \"some-gnd-atom\")"
^  Exit: (272) [user] mfix_vars1(";;            write!(f, \"some-gnd-atom\")", ";;            write!(f, \"some-gnd-atom\")")
   Call: (272) [apply] apply:maplist_([1516, 0], _6034, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1516, 0], [_39096|_39098], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1516, _39096)
^  Unify: (273) [user] mfix_vars1(1516, _39096)
   Call: (274) [system] var(1516)
^  Redo: (273) [user] mfix_vars1(1516, _39096)
^  Unify: (273) [user] mfix_vars1(1516, '$VAR'(_43742))
   Call: (274) [system] atom(1516)
^  Redo: (273) [user] mfix_vars1(1516, _39096)
^  Unify: (273) [user] mfix_vars1(1516, _39096)
   Call: (274) [system] 1516==true
^  Redo: (273) [user] mfix_vars1(1516, _39096)
^  Unify: (273) [user] mfix_vars1(1516, _39096)
   Call: (274) [system] 1516==false
^  Redo: (273) [user] mfix_vars1(1516, _39096)
^  Unify: (273) [user] mfix_vars1(1516, _39096)
   Call: (274) [system] 1516==[_53022, _53028]
^  Redo: (273) [user] mfix_vars1(1516, _39096)
^  Unify: (273) [user] mfix_vars1(1516, _39096)
   Call: (274) [system] is_list(1516)
^  Redo: (273) [user] mfix_vars1(1516, _39096)
^  Unify: (273) [user] mfix_vars1(1516, _39096)
   Call: (274) [system] string(1516)
^  Redo: (273) [user] mfix_vars1(1516, _39096)
^  Unify: (273) [user] mfix_vars1(1516, _39096)
   Call: (274) [system] compound(1516)
^  Redo: (273) [user] mfix_vars1(1516, _39096)
^  Unify: (273) [user] mfix_vars1(1516, _39096)
^  Call: (274) [user] symbol(1516)
^  Unify: (274) [user] symbol(1516)
   Call: (275) [system] atom(1516)
   Fail: (275) [system] atom(1516)
^  Fail: (274) [user] symbol(1516)
^  Redo: (273) [user] mfix_vars1(1516, _39096)
   Call: (274) [system] 1516=_39096
   Exit: (274) [system] 1516=1516
^  Exit: (273) [user] mfix_vars1(1516, 1516)
   Call: (273) [apply] apply:maplist_([0], _39098, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_73422|_73424], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _73422)
^  Unify: (274) [user] mfix_vars1(0, _73422)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _73422)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_78068))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _73422)
^  Unify: (274) [user] mfix_vars1(0, _73422)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _73422)
^  Unify: (274) [user] mfix_vars1(0, _73422)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _73422)
^  Unify: (274) [user] mfix_vars1(0, _73422)
   Call: (275) [system] 0==[_87348, _87354]
^  Redo: (274) [user] mfix_vars1(0, _73422)
^  Unify: (274) [user] mfix_vars1(0, _73422)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _73422)
^  Unify: (274) [user] mfix_vars1(0, _73422)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _73422)
^  Unify: (274) [user] mfix_vars1(0, _73422)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _73422)
^  Unify: (274) [user] mfix_vars1(0, _73422)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _73422)
   Call: (275) [system] 0=_73422
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _73424, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1516, 0], [1516, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            write!(f, \"some-gnd-atom\")", 1516, 0], [";;            write!(f, \"some-gnd-atom\")", 1516, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            write!(f, \"some-gnd-atom\")", 1516, 0], [";;            write!(f, \"some-gnd-atom\")", 1516, 0])
   Call: (270) [system] compound_name_arguments(_5986, '$COMMENT', [";;            write!(f, \"some-gnd-atom\")", 1516, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT', [";;            write!(f, \"some-gnd-atom\")", 1516, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0)))
   Call: (267) [system] '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0)\=@='$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _5972)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _123596))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _123596))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _123596))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _123596))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _123596)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _123596)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _129182))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _129182))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _129182)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _129182)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _129182)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0)))
   Call: (267) [system] '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0)\=@='$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _123596)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _5952))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _5952))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _5952))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _5952))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _5952)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _151502))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _151502))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _151502)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _151502)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _151502)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0)))
   Call: (267) [system] '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0)\=@='$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0)))
   Call: (261) [system] '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0)\=@='$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _180280, [], _180282)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _180280, [], _180282)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _180280, [], _180282)
   Call: (258) [system] atom('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _180280, [], _180282)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _180280, [], _180282)
   Call: (258) [system] compound('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), _189596, _189598)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT', [";;            write!(f, \"some-gnd-atom\")", 1516, 0])
^  Call: (258) [user] subst_vars([";;            write!(f, \"some-gnd-atom\")", 1516, 0], _191482, [], _180282)
^  Unify: (258) [user] subst_vars([";;            write!(f, \"some-gnd-atom\")", 1516, 0], [";;            write!(f, \"some-gnd-atom\")", 1516, 0], [], [])
   Call: (259) [system] var([";;            write!(f, \"some-gnd-atom\")", 1516, 0])
^  Redo: (258) [user] subst_vars([";;            write!(f, \"some-gnd-atom\")", 1516, 0], _191482, [], _180282)
^  Unify: (258) [user] subst_vars([";;            write!(f, \"some-gnd-atom\")", 1516, 0], [_195218|_195220], [], _180282)
^  Call: (259) [user] subst_vars(";;            write!(f, \"some-gnd-atom\")", _195218, [], _196158)
^  Unify: (259) [user] subst_vars(";;            write!(f, \"some-gnd-atom\")", ";;            write!(f, \"some-gnd-atom\")", [], [])
   Call: (260) [system] var(";;            write!(f, \"some-gnd-atom\")")
^  Redo: (259) [user] subst_vars(";;            write!(f, \"some-gnd-atom\")", _195218, [], _196158)
^  Unify: (259) [user] subst_vars(";;            write!(f, \"some-gnd-atom\")", _195218, [], _196158)
   Call: (260) [system] atom(";;            write!(f, \"some-gnd-atom\")")
^  Redo: (259) [user] subst_vars(";;            write!(f, \"some-gnd-atom\")", _195218, [], _196158)
^  Unify: (259) [user] subst_vars(";;            write!(f, \"some-gnd-atom\")", _195218, [], _196158)
   Call: (260) [system] compound(";;            write!(f, \"some-gnd-atom\")")
^  Redo: (259) [user] subst_vars(";;            write!(f, \"some-gnd-atom\")", _195218, [], _196158)
^  Unify: (259) [user] subst_vars(";;            write!(f, \"some-gnd-atom\")", ";;            write!(f, \"some-gnd-atom\")", [], [])
^  Exit: (259) [user] subst_vars(";;            write!(f, \"some-gnd-atom\")", ";;            write!(f, \"some-gnd-atom\")", [], [])
^  Call: (259) [user] subst_vars([1516, 0], _195220, [], _180282)
^  Unify: (259) [user] subst_vars([1516, 0], [1516, 0], [], [])
   Call: (260) [system] var([1516, 0])
^  Redo: (259) [user] subst_vars([1516, 0], _195220, [], _180282)
^  Unify: (259) [user] subst_vars([1516, 0], [_211090|_211092], [], _180282)
^  Call: (260) [user] subst_vars(1516, _211090, [], _212030)
^  Unify: (260) [user] subst_vars(1516, 1516, [], [])
   Call: (261) [system] var(1516)
^  Redo: (260) [user] subst_vars(1516, _211090, [], _212030)
^  Unify: (260) [user] subst_vars(1516, _211090, [], _212030)
   Call: (261) [system] atom(1516)
^  Redo: (260) [user] subst_vars(1516, _211090, [], _212030)
^  Unify: (260) [user] subst_vars(1516, _211090, [], _212030)
   Call: (261) [system] compound(1516)
^  Redo: (260) [user] subst_vars(1516, _211090, [], _212030)
^  Unify: (260) [user] subst_vars(1516, 1516, [], [])
^  Exit: (260) [user] subst_vars(1516, 1516, [], [])
^  Call: (260) [user] subst_vars([0], _211092, [], _180282)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _211092, [], _180282)
^  Unify: (260) [user] subst_vars([0], [_226962|_226964], [], _180282)
^  Call: (261) [user] subst_vars(0, _226962, [], _227902)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _226962, [], _227902)
^  Unify: (261) [user] subst_vars(0, _226962, [], _227902)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _226962, [], _227902)
^  Unify: (261) [user] subst_vars(0, _226962, [], _227902)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _226962, [], _227902)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _226964, [], _180282)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _226964, [], _180282)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1516, 0], [1516, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            write!(f, \"some-gnd-atom\")", 1516, 0], [";;            write!(f, \"some-gnd-atom\")", 1516, 0], [], [])
   Call: (258) [system] compound_name_arguments(_180280, '$COMMENT', [";;            write!(f, \"some-gnd-atom\")", 1516, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT', [";;            write!(f, \"some-gnd-atom\")", 1516, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), [], [])
   Call: (257) [system] _250320=metta_file_buffer(+, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            write!(f, \"some-gnd-atom\")", 1516, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1517, 0, 54641, '$COMMENT'(";;        }", 1517, 0), '$stream_position'(54641, 1517, 0, 54675)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        }", 1517, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        }", 1517, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        }", 1517, 0), _303038))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        }", 1517, 0), _303038))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        }", 1517, 0), _303038)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        }", 1517, 0), _303038)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        }", 1517, 0), _303038)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        }", 1517, 0), _303038)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        }", 1517, 0), _308650))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        }", 1517, 0), _308650))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        }", 1517, 0), _308650))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        }", 1517, 0), _308650))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        }", 1517, 0), _308650)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        }", 1517, 0), _308650)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        }", 1517, 0), _314236))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        }", 1517, 0), _314236))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        }", 1517, 0), _314236)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        }", 1517, 0), _314236)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1517, 0), _314236)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1517, 0), _314236)
   Call: (270) [system] var('$COMMENT'(";;        }", 1517, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1517, 0), _314236)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1517, 0), '$VAR'(_321696))
   Call: (270) [system] atom('$COMMENT'(";;        }", 1517, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1517, 0), _314236)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1517, 0), _314236)
   Call: (270) [system] '$COMMENT'(";;        }", 1517, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1517, 0), _314236)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1517, 0), _314236)
   Call: (270) [system] '$COMMENT'(";;        }", 1517, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1517, 0), _314236)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1517, 0), _314236)
   Call: (270) [system] '$COMMENT'(";;        }", 1517, 0)==[_330976, _330982]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1517, 0), _314236)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1517, 0), _314236)
   Call: (270) [system] is_list('$COMMENT'(";;        }", 1517, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1517, 0), _314236)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1517, 0), _314236)
   Call: (270) [system] string('$COMMENT'(";;        }", 1517, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1517, 0), _314236)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1517, 0), _314236)
   Call: (270) [system] compound('$COMMENT'(";;        }", 1517, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        }", 1517, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        }", 1517, 0), _341178, _341180)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        }", 1517, 0), '$COMMENT', [";;        }", 1517, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        }", 1517, 0], _344920)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        }", 1517, 0], _344920)
   Call: (271) [apply] apply:maplist_([";;        }", 1517, 0], _344920, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        }", 1517, 0], [_347738|_347740], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        }", _347738)
^  Unify: (272) [user] mfix_vars1(";;        }", _347738)
   Call: (273) [system] var(";;        }")
^  Redo: (272) [user] mfix_vars1(";;        }", _347738)
^  Unify: (272) [user] mfix_vars1(";;        }", '$VAR'(_352384))
   Call: (273) [system] atom(";;        }")
^  Redo: (272) [user] mfix_vars1(";;        }", _347738)
^  Unify: (272) [user] mfix_vars1(";;        }", _347738)
   Call: (273) [system] ";;        }"==true
^  Redo: (272) [user] mfix_vars1(";;        }", _347738)
^  Unify: (272) [user] mfix_vars1(";;        }", _347738)
   Call: (273) [system] ";;        }"==false
^  Redo: (272) [user] mfix_vars1(";;        }", _347738)
^  Unify: (272) [user] mfix_vars1(";;        }", _347738)
   Call: (273) [system] ";;        }"==[_361664, _361670]
^  Redo: (272) [user] mfix_vars1(";;        }", _347738)
^  Unify: (272) [user] mfix_vars1(";;        }", _347738)
   Call: (273) [system] is_list(";;        }")
^  Redo: (272) [user] mfix_vars1(";;        }", _347738)
^  Unify: (272) [user] mfix_vars1(";;        }", _347738)
   Call: (273) [system] string(";;        }")
   Exit: (273) [system] string(";;        }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        }", _347738)
^  Unify: (272) [user] mfix_vars1(";;        }", _347738)
   Call: (273) [system] compound(";;        }")
^  Redo: (272) [user] mfix_vars1(";;        }", _347738)
^  Unify: (272) [user] mfix_vars1(";;        }", _347738)
^  Call: (273) [user] symbol(";;        }")
^  Unify: (273) [user] symbol(";;        }")
   Call: (274) [system] atom(";;        }")
   Fail: (274) [system] atom(";;        }")
^  Fail: (273) [user] symbol(";;        }")
^  Redo: (272) [user] mfix_vars1(";;        }", _347738)
   Call: (273) [system] ";;        }"=_347738
   Exit: (273) [system] ";;        }"=";;        }"
^  Exit: (272) [user] mfix_vars1(";;        }", ";;        }")
   Call: (272) [apply] apply:maplist_([1517, 0], _347740, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1517, 0], [_385736|_385738], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1517, _385736)
^  Unify: (273) [user] mfix_vars1(1517, _385736)
   Call: (274) [system] var(1517)
^  Redo: (273) [user] mfix_vars1(1517, _385736)
^  Unify: (273) [user] mfix_vars1(1517, '$VAR'(_390382))
   Call: (274) [system] atom(1517)
^  Redo: (273) [user] mfix_vars1(1517, _385736)
^  Unify: (273) [user] mfix_vars1(1517, _385736)
   Call: (274) [system] 1517==true
^  Redo: (273) [user] mfix_vars1(1517, _385736)
^  Unify: (273) [user] mfix_vars1(1517, _385736)
   Call: (274) [system] 1517==false
^  Redo: (273) [user] mfix_vars1(1517, _385736)
^  Unify: (273) [user] mfix_vars1(1517, _385736)
   Call: (274) [system] 1517==[_399662, _399668]
^  Redo: (273) [user] mfix_vars1(1517, _385736)
^  Unify: (273) [user] mfix_vars1(1517, _385736)
   Call: (274) [system] is_list(1517)
^  Redo: (273) [user] mfix_vars1(1517, _385736)
^  Unify: (273) [user] mfix_vars1(1517, _385736)
   Call: (274) [system] string(1517)
^  Redo: (273) [user] mfix_vars1(1517, _385736)
^  Unify: (273) [user] mfix_vars1(1517, _385736)
   Call: (274) [system] compound(1517)
^  Redo: (273) [user] mfix_vars1(1517, _385736)
^  Unify: (273) [user] mfix_vars1(1517, _385736)
^  Call: (274) [user] symbol(1517)
^  Unify: (274) [user] symbol(1517)
   Call: (275) [system] atom(1517)
   Fail: (275) [system] atom(1517)
^  Fail: (274) [user] symbol(1517)
^  Redo: (273) [user] mfix_vars1(1517, _385736)
   Call: (274) [system] 1517=_385736
   Exit: (274) [system] 1517=1517
^  Exit: (273) [user] mfix_vars1(1517, 1517)
   Call: (273) [apply] apply:maplist_([0], _385738, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_420062|_420064], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _420062)
^  Unify: (274) [user] mfix_vars1(0, _420062)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _420062)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_424708))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _420062)
^  Unify: (274) [user] mfix_vars1(0, _420062)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _420062)
^  Unify: (274) [user] mfix_vars1(0, _420062)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _420062)
^  Unify: (274) [user] mfix_vars1(0, _420062)
   Call: (275) [system] 0==[_433988, _433994]
^  Redo: (274) [user] mfix_vars1(0, _420062)
^  Unify: (274) [user] mfix_vars1(0, _420062)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _420062)
^  Unify: (274) [user] mfix_vars1(0, _420062)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _420062)
^  Unify: (274) [user] mfix_vars1(0, _420062)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _420062)
^  Unify: (274) [user] mfix_vars1(0, _420062)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _420062)
   Call: (275) [system] 0=_420062
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _420064, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1517, 0], [1517, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        }", 1517, 0], [";;        }", 1517, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        }", 1517, 0], [";;        }", 1517, 0])
   Call: (270) [system] compound_name_arguments(_314236, '$COMMENT', [";;        }", 1517, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        }", 1517, 0), '$COMMENT', [";;        }", 1517, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0)))
   Call: (267) [system] '$COMMENT'(";;        }", 1517, 0)\=@='$COMMENT'(";;        }", 1517, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        }", 1517, 0), _308650)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        }", 1517, 0), _470236))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        }", 1517, 0), _470236))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        }", 1517, 0), _470236))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        }", 1517, 0), _470236))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        }", 1517, 0), _470236)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        }", 1517, 0), _470236)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        }", 1517, 0), _475822))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        }", 1517, 0), _475822))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        }", 1517, 0), _475822)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        }", 1517, 0), _475822)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        }", 1517, 0), _475822)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0)))
   Call: (267) [system] '$COMMENT'(";;        }", 1517, 0)\=@='$COMMENT'(";;        }", 1517, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        }", 1517, 0), _470236)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        }", 1517, 0), _303038))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        }", 1517, 0), _303038))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        }", 1517, 0), _303038))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        }", 1517, 0), _303038))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        }", 1517, 0), _303038)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        }", 1517, 0), _303038)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        }", 1517, 0), _498142))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        }", 1517, 0), _498142))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        }", 1517, 0), _498142)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        }", 1517, 0), _498142)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        }", 1517, 0), _498142)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0)))
   Call: (267) [system] '$COMMENT'(";;        }", 1517, 0)\=@='$COMMENT'(";;        }", 1517, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        }", 1517, 0), _303038)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0)))
   Call: (261) [system] '$COMMENT'(";;        }", 1517, 0)\=@='$COMMENT'(";;        }", 1517, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        }", 1517, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        }", 1517, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        }", 1517, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        }", 1517, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        }", 1517, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        }", 1517, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        }", 1517, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        }", 1517, 0), _8698, [], _8700)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        }", 1517, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        }", 1517, 0), _8698, [], _8700)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        }", 1517, 0), _8698, [], _8700)
   Call: (258) [system] atom('$COMMENT'(";;        }", 1517, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        }", 1517, 0), _8698, [], _8700)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        }", 1517, 0), _8698, [], _8700)
   Call: (258) [system] compound('$COMMENT'(";;        }", 1517, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        }", 1517, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        }", 1517, 0), _18014, _18016)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        }", 1517, 0), '$COMMENT', [";;        }", 1517, 0])
^  Call: (258) [user] subst_vars([";;        }", 1517, 0], _19900, [], _8700)
^  Unify: (258) [user] subst_vars([";;        }", 1517, 0], [";;        }", 1517, 0], [], [])
   Call: (259) [system] var([";;        }", 1517, 0])
^  Redo: (258) [user] subst_vars([";;        }", 1517, 0], _19900, [], _8700)
^  Unify: (258) [user] subst_vars([";;        }", 1517, 0], [_23636|_23638], [], _8700)
^  Call: (259) [user] subst_vars(";;        }", _23636, [], _24576)
^  Unify: (259) [user] subst_vars(";;        }", ";;        }", [], [])
   Call: (260) [system] var(";;        }")
^  Redo: (259) [user] subst_vars(";;        }", _23636, [], _24576)
^  Unify: (259) [user] subst_vars(";;        }", _23636, [], _24576)
   Call: (260) [system] atom(";;        }")
^  Redo: (259) [user] subst_vars(";;        }", _23636, [], _24576)
^  Unify: (259) [user] subst_vars(";;        }", _23636, [], _24576)
   Call: (260) [system] compound(";;        }")
^  Redo: (259) [user] subst_vars(";;        }", _23636, [], _24576)
^  Unify: (259) [user] subst_vars(";;        }", ";;        }", [], [])
^  Exit: (259) [user] subst_vars(";;        }", ";;        }", [], [])
^  Call: (259) [user] subst_vars([1517, 0], _23638, [], _8700)
^  Unify: (259) [user] subst_vars([1517, 0], [1517, 0], [], [])
   Call: (260) [system] var([1517, 0])
^  Redo: (259) [user] subst_vars([1517, 0], _23638, [], _8700)
^  Unify: (259) [user] subst_vars([1517, 0], [_39508|_39510], [], _8700)
^  Call: (260) [user] subst_vars(1517, _39508, [], _40448)
^  Unify: (260) [user] subst_vars(1517, 1517, [], [])
   Call: (261) [system] var(1517)
^  Redo: (260) [user] subst_vars(1517, _39508, [], _40448)
^  Unify: (260) [user] subst_vars(1517, _39508, [], _40448)
   Call: (261) [system] atom(1517)
^  Redo: (260) [user] subst_vars(1517, _39508, [], _40448)
^  Unify: (260) [user] subst_vars(1517, _39508, [], _40448)
   Call: (261) [system] compound(1517)
^  Redo: (260) [user] subst_vars(1517, _39508, [], _40448)
^  Unify: (260) [user] subst_vars(1517, 1517, [], [])
^  Exit: (260) [user] subst_vars(1517, 1517, [], [])
^  Call: (260) [user] subst_vars([0], _39510, [], _8700)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _39510, [], _8700)
^  Unify: (260) [user] subst_vars([0], [_55380|_55382], [], _8700)
^  Call: (261) [user] subst_vars(0, _55380, [], _56320)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _55380, [], _56320)
^  Unify: (261) [user] subst_vars(0, _55380, [], _56320)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _55380, [], _56320)
^  Unify: (261) [user] subst_vars(0, _55380, [], _56320)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _55380, [], _56320)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _55382, [], _8700)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _55382, [], _8700)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1517, 0], [1517, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        }", 1517, 0], [";;        }", 1517, 0], [], [])
   Call: (258) [system] compound_name_arguments(_8698, '$COMMENT', [";;        }", 1517, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        }", 1517, 0), '$COMMENT', [";;        }", 1517, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        }", 1517, 0), '$COMMENT'(";;        }", 1517, 0), [], [])
   Call: (257) [system] _78738=metta_file_buffer(+, '$COMMENT'(";;        }", 1517, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        }", 1517, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        }", 1517, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        }", 1517, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        }", 1517, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        }", 1517, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        }", 1517, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        }", 1517, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        }", 1517, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1518, 0, 54653, '$COMMENT'(";;    }", 1518, 0), '$stream_position'(54653, 1518, 0, 54687)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1518, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1518, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    }", 1518, 0), _131456))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1518, 0), _131456))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    }", 1518, 0), _131456)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1518, 0), _131456)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1518, 0), _131456)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1518, 0), _131456)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    }", 1518, 0), _137068))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1518, 0), _137068))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1518, 0), _137068))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1518, 0), _137068))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1518, 0), _137068)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1518, 0), _137068)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    }", 1518, 0), _142654))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1518, 0), _142654))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    }", 1518, 0), _142654)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1518, 0), _142654)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1518, 0), _142654)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1518, 0), _142654)
   Call: (270) [system] var('$COMMENT'(";;    }", 1518, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1518, 0), _142654)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1518, 0), '$VAR'(_150114))
   Call: (270) [system] atom('$COMMENT'(";;    }", 1518, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1518, 0), _142654)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1518, 0), _142654)
   Call: (270) [system] '$COMMENT'(";;    }", 1518, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1518, 0), _142654)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1518, 0), _142654)
   Call: (270) [system] '$COMMENT'(";;    }", 1518, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1518, 0), _142654)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1518, 0), _142654)
   Call: (270) [system] '$COMMENT'(";;    }", 1518, 0)==[_159394, _159400]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1518, 0), _142654)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1518, 0), _142654)
   Call: (270) [system] is_list('$COMMENT'(";;    }", 1518, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1518, 0), _142654)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1518, 0), _142654)
   Call: (270) [system] string('$COMMENT'(";;    }", 1518, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1518, 0), _142654)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1518, 0), _142654)
   Call: (270) [system] compound('$COMMENT'(";;    }", 1518, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    }", 1518, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1518, 0), _169596, _169598)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1518, 0), '$COMMENT', [";;    }", 1518, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    }", 1518, 0], _173338)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1518, 0], _173338)
   Call: (271) [apply] apply:maplist_([";;    }", 1518, 0], _173338, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    }", 1518, 0], [_176156|_176158], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    }", _176156)
^  Unify: (272) [user] mfix_vars1(";;    }", _176156)
   Call: (273) [system] var(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _176156)
^  Unify: (272) [user] mfix_vars1(";;    }", '$VAR'(_180802))
   Call: (273) [system] atom(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _176156)
^  Unify: (272) [user] mfix_vars1(";;    }", _176156)
   Call: (273) [system] ";;    }"==true
^  Redo: (272) [user] mfix_vars1(";;    }", _176156)
^  Unify: (272) [user] mfix_vars1(";;    }", _176156)
   Call: (273) [system] ";;    }"==false
^  Redo: (272) [user] mfix_vars1(";;    }", _176156)
^  Unify: (272) [user] mfix_vars1(";;    }", _176156)
   Call: (273) [system] ";;    }"==[_190082, _190088]
^  Redo: (272) [user] mfix_vars1(";;    }", _176156)
^  Unify: (272) [user] mfix_vars1(";;    }", _176156)
   Call: (273) [system] is_list(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _176156)
^  Unify: (272) [user] mfix_vars1(";;    }", _176156)
   Call: (273) [system] string(";;    }")
   Exit: (273) [system] string(";;    }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    }", _176156)
^  Unify: (272) [user] mfix_vars1(";;    }", _176156)
   Call: (273) [system] compound(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _176156)
^  Unify: (272) [user] mfix_vars1(";;    }", _176156)
^  Call: (273) [user] symbol(";;    }")
^  Unify: (273) [user] symbol(";;    }")
   Call: (274) [system] atom(";;    }")
   Fail: (274) [system] atom(";;    }")
^  Fail: (273) [user] symbol(";;    }")
^  Redo: (272) [user] mfix_vars1(";;    }", _176156)
   Call: (273) [system] ";;    }"=_176156
   Exit: (273) [system] ";;    }"=";;    }"
^  Exit: (272) [user] mfix_vars1(";;    }", ";;    }")
   Call: (272) [apply] apply:maplist_([1518, 0], _176158, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1518, 0], [_214154|_214156], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1518, _214154)
^  Unify: (273) [user] mfix_vars1(1518, _214154)
   Call: (274) [system] var(1518)
^  Redo: (273) [user] mfix_vars1(1518, _214154)
^  Unify: (273) [user] mfix_vars1(1518, '$VAR'(_218800))
   Call: (274) [system] atom(1518)
^  Redo: (273) [user] mfix_vars1(1518, _214154)
^  Unify: (273) [user] mfix_vars1(1518, _214154)
   Call: (274) [system] 1518==true
^  Redo: (273) [user] mfix_vars1(1518, _214154)
^  Unify: (273) [user] mfix_vars1(1518, _214154)
   Call: (274) [system] 1518==false
^  Redo: (273) [user] mfix_vars1(1518, _214154)
^  Unify: (273) [user] mfix_vars1(1518, _214154)
   Call: (274) [system] 1518==[_228080, _228086]
^  Redo: (273) [user] mfix_vars1(1518, _214154)
^  Unify: (273) [user] mfix_vars1(1518, _214154)
   Call: (274) [system] is_list(1518)
^  Redo: (273) [user] mfix_vars1(1518, _214154)
^  Unify: (273) [user] mfix_vars1(1518, _214154)
   Call: (274) [system] string(1518)
^  Redo: (273) [user] mfix_vars1(1518, _214154)
^  Unify: (273) [user] mfix_vars1(1518, _214154)
   Call: (274) [system] compound(1518)
^  Redo: (273) [user] mfix_vars1(1518, _214154)
^  Unify: (273) [user] mfix_vars1(1518, _214154)
^  Call: (274) [user] symbol(1518)
^  Unify: (274) [user] symbol(1518)
   Call: (275) [system] atom(1518)
   Fail: (275) [system] atom(1518)
^  Fail: (274) [user] symbol(1518)
^  Redo: (273) [user] mfix_vars1(1518, _214154)
   Call: (274) [system] 1518=_214154
   Exit: (274) [system] 1518=1518
^  Exit: (273) [user] mfix_vars1(1518, 1518)
   Call: (273) [apply] apply:maplist_([0], _214156, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_248480|_248482], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _248480)
^  Unify: (274) [user] mfix_vars1(0, _248480)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _248480)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_253126))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _248480)
^  Unify: (274) [user] mfix_vars1(0, _248480)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _248480)
^  Unify: (274) [user] mfix_vars1(0, _248480)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _248480)
^  Unify: (274) [user] mfix_vars1(0, _248480)
   Call: (275) [system] 0==[_262406, _262412]
^  Redo: (274) [user] mfix_vars1(0, _248480)
^  Unify: (274) [user] mfix_vars1(0, _248480)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _248480)
^  Unify: (274) [user] mfix_vars1(0, _248480)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _248480)
^  Unify: (274) [user] mfix_vars1(0, _248480)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _248480)
^  Unify: (274) [user] mfix_vars1(0, _248480)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _248480)
   Call: (275) [system] 0=_248480
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _248482, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1518, 0], [1518, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    }", 1518, 0], [";;    }", 1518, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    }", 1518, 0], [";;    }", 1518, 0])
   Call: (270) [system] compound_name_arguments(_142654, '$COMMENT', [";;    }", 1518, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    }", 1518, 0), '$COMMENT', [";;    }", 1518, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1518, 0)\=@='$COMMENT'(";;    }", 1518, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1518, 0), _137068)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    }", 1518, 0), _298654))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1518, 0), _298654))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1518, 0), _298654))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1518, 0), _298654))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1518, 0), _298654)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1518, 0), _298654)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    }", 1518, 0), _304240))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1518, 0), _304240))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    }", 1518, 0), _304240)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1518, 0), _304240)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    }", 1518, 0), _304240)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1518, 0)\=@='$COMMENT'(";;    }", 1518, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1518, 0), _298654)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    }", 1518, 0), _131456))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1518, 0), _131456))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1518, 0), _131456))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1518, 0), _131456))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1518, 0), _131456)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1518, 0), _131456)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    }", 1518, 0), _326560))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1518, 0), _326560))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    }", 1518, 0), _326560)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1518, 0), _326560)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    }", 1518, 0), _326560)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0)))
   Call: (267) [system] '$COMMENT'(";;    }", 1518, 0)\=@='$COMMENT'(";;    }", 1518, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1518, 0), _131456)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0)))
   Call: (261) [system] '$COMMENT'(";;    }", 1518, 0)\=@='$COMMENT'(";;    }", 1518, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1518, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1518, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1518, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1518, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    }", 1518, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    }", 1518, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    }", 1518, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    }", 1518, 0), _355338, [], _355340)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    }", 1518, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1518, 0), _355338, [], _355340)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1518, 0), _355338, [], _355340)
   Call: (258) [system] atom('$COMMENT'(";;    }", 1518, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    }", 1518, 0), _355338, [], _355340)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    }", 1518, 0), _355338, [], _355340)
   Call: (258) [system] compound('$COMMENT'(";;    }", 1518, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    }", 1518, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1518, 0), _364654, _364656)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1518, 0), '$COMMENT', [";;    }", 1518, 0])
^  Call: (258) [user] subst_vars([";;    }", 1518, 0], _366540, [], _355340)
^  Unify: (258) [user] subst_vars([";;    }", 1518, 0], [";;    }", 1518, 0], [], [])
   Call: (259) [system] var([";;    }", 1518, 0])
^  Redo: (258) [user] subst_vars([";;    }", 1518, 0], _366540, [], _355340)
^  Unify: (258) [user] subst_vars([";;    }", 1518, 0], [_370276|_370278], [], _355340)
^  Call: (259) [user] subst_vars(";;    }", _370276, [], _371216)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
   Call: (260) [system] var(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _370276, [], _371216)
^  Unify: (259) [user] subst_vars(";;    }", _370276, [], _371216)
   Call: (260) [system] atom(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _370276, [], _371216)
^  Unify: (259) [user] subst_vars(";;    }", _370276, [], _371216)
   Call: (260) [system] compound(";;    }")
^  Redo: (259) [user] subst_vars(";;    }", _370276, [], _371216)
^  Unify: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Exit: (259) [user] subst_vars(";;    }", ";;    }", [], [])
^  Call: (259) [user] subst_vars([1518, 0], _370278, [], _355340)
^  Unify: (259) [user] subst_vars([1518, 0], [1518, 0], [], [])
   Call: (260) [system] var([1518, 0])
^  Redo: (259) [user] subst_vars([1518, 0], _370278, [], _355340)
^  Unify: (259) [user] subst_vars([1518, 0], [_386148|_386150], [], _355340)
^  Call: (260) [user] subst_vars(1518, _386148, [], _387088)
^  Unify: (260) [user] subst_vars(1518, 1518, [], [])
   Call: (261) [system] var(1518)
^  Redo: (260) [user] subst_vars(1518, _386148, [], _387088)
^  Unify: (260) [user] subst_vars(1518, _386148, [], _387088)
   Call: (261) [system] atom(1518)
^  Redo: (260) [user] subst_vars(1518, _386148, [], _387088)
^  Unify: (260) [user] subst_vars(1518, _386148, [], _387088)
   Call: (261) [system] compound(1518)
^  Redo: (260) [user] subst_vars(1518, _386148, [], _387088)
^  Unify: (260) [user] subst_vars(1518, 1518, [], [])
^  Exit: (260) [user] subst_vars(1518, 1518, [], [])
^  Call: (260) [user] subst_vars([0], _386150, [], _355340)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _386150, [], _355340)
^  Unify: (260) [user] subst_vars([0], [_402020|_402022], [], _355340)
^  Call: (261) [user] subst_vars(0, _402020, [], _402960)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _402020, [], _402960)
^  Unify: (261) [user] subst_vars(0, _402020, [], _402960)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _402020, [], _402960)
^  Unify: (261) [user] subst_vars(0, _402020, [], _402960)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _402020, [], _402960)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _402022, [], _355340)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _402022, [], _355340)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1518, 0], [1518, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    }", 1518, 0], [";;    }", 1518, 0], [], [])
   Call: (258) [system] compound_name_arguments(_355338, '$COMMENT', [";;    }", 1518, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    }", 1518, 0), '$COMMENT', [";;    }", 1518, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    }", 1518, 0), '$COMMENT'(";;    }", 1518, 0), [], [])
   Call: (257) [system] _425378=metta_file_buffer(+, '$COMMENT'(";;    }", 1518, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    }", 1518, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    }", 1518, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1518, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    }", 1518, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1518, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1518, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1518, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    }", 1518, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1519, 0, 54661, '$COMMENT'(";;", 1519, 0), '$stream_position'(54661, 1519, 0, 54695)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1519, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1519, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1519, 0), _478094))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1519, 0), _478094))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1519, 0), _478094)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1519, 0), _478094)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1519, 0), _478094)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1519, 0), _478094)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1519, 0), _483706))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1519, 0), _483706))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1519, 0), _483706))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1519, 0), _483706))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1519, 0), _483706)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1519, 0), _483706)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1519, 0), _489292))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1519, 0), _489292))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1519, 0), _489292)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1519, 0), _489292)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1519, 0), _489292)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1519, 0), _489292)
   Call: (270) [system] var('$COMMENT'(";;", 1519, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1519, 0), _489292)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1519, 0), '$VAR'(_496752))
   Call: (270) [system] atom('$COMMENT'(";;", 1519, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1519, 0), _489292)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1519, 0), _489292)
   Call: (270) [system] '$COMMENT'(";;", 1519, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1519, 0), _489292)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1519, 0), _489292)
   Call: (270) [system] '$COMMENT'(";;", 1519, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1519, 0), _489292)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1519, 0), _489292)
   Call: (270) [system] '$COMMENT'(";;", 1519, 0)==[_506032, _506038]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1519, 0), _489292)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1519, 0), _489292)
   Call: (270) [system] is_list('$COMMENT'(";;", 1519, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1519, 0), _489292)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1519, 0), _489292)
   Call: (270) [system] string('$COMMENT'(";;", 1519, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1519, 0), _489292)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1519, 0), _489292)
   Call: (270) [system] compound('$COMMENT'(";;", 1519, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1519, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1519, 0), _516234, _516236)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1519, 0), '$COMMENT', [";;", 1519, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1519, 0], _519976)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1519, 0], _519976)
   Call: (271) [apply] apply:maplist_([";;", 1519, 0], _519976, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1519, 0], [_522794|_522796], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_9518))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] ";;"==[_18798, _18804]
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _6022)
^  Unify: (272) [user] mfix_vars1(";;", _6022)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _6022)
   Call: (273) [system] ";;"=_6022
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1519, 0], _6024, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1519, 0], [_42870|_42872], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1519, _42870)
^  Unify: (273) [user] mfix_vars1(1519, _42870)
   Call: (274) [system] var(1519)
^  Redo: (273) [user] mfix_vars1(1519, _42870)
^  Unify: (273) [user] mfix_vars1(1519, '$VAR'(_47516))
   Call: (274) [system] atom(1519)
^  Redo: (273) [user] mfix_vars1(1519, _42870)
^  Unify: (273) [user] mfix_vars1(1519, _42870)
   Call: (274) [system] 1519==true
^  Redo: (273) [user] mfix_vars1(1519, _42870)
^  Unify: (273) [user] mfix_vars1(1519, _42870)
   Call: (274) [system] 1519==false
^  Redo: (273) [user] mfix_vars1(1519, _42870)
^  Unify: (273) [user] mfix_vars1(1519, _42870)
   Call: (274) [system] 1519==[_56796, _56802]
^  Redo: (273) [user] mfix_vars1(1519, _42870)
^  Unify: (273) [user] mfix_vars1(1519, _42870)
   Call: (274) [system] is_list(1519)
^  Redo: (273) [user] mfix_vars1(1519, _42870)
^  Unify: (273) [user] mfix_vars1(1519, _42870)
   Call: (274) [system] string(1519)
^  Redo: (273) [user] mfix_vars1(1519, _42870)
^  Unify: (273) [user] mfix_vars1(1519, _42870)
   Call: (274) [system] compound(1519)
^  Redo: (273) [user] mfix_vars1(1519, _42870)
^  Unify: (273) [user] mfix_vars1(1519, _42870)
^  Call: (274) [user] symbol(1519)
^  Unify: (274) [user] symbol(1519)
   Call: (275) [system] atom(1519)
   Fail: (275) [system] atom(1519)
^  Fail: (274) [user] symbol(1519)
^  Redo: (273) [user] mfix_vars1(1519, _42870)
   Call: (274) [system] 1519=_42870
   Exit: (274) [system] 1519=1519
^  Exit: (273) [user] mfix_vars1(1519, 1519)
   Call: (273) [apply] apply:maplist_([0], _42872, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_77196|_77198], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _77196)
^  Unify: (274) [user] mfix_vars1(0, _77196)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _77196)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_81842))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _77196)
^  Unify: (274) [user] mfix_vars1(0, _77196)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _77196)
^  Unify: (274) [user] mfix_vars1(0, _77196)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _77196)
^  Unify: (274) [user] mfix_vars1(0, _77196)
   Call: (275) [system] 0==[_91122, _91128]
^  Redo: (274) [user] mfix_vars1(0, _77196)
^  Unify: (274) [user] mfix_vars1(0, _77196)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _77196)
^  Unify: (274) [user] mfix_vars1(0, _77196)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _77196)
^  Unify: (274) [user] mfix_vars1(0, _77196)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _77196)
^  Unify: (274) [user] mfix_vars1(0, _77196)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _77196)
   Call: (275) [system] 0=_77196
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _77198, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1519, 0], [1519, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1519, 0], [";;", 1519, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1519, 0], [";;", 1519, 0])
   Call: (270) [system] compound_name_arguments(_5976, '$COMMENT', [";;", 1519, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1519, 0), '$COMMENT', [";;", 1519, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1519, 0)\=@='$COMMENT'(";;", 1519, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1519, 0), _5962)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1519, 0), _127370))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1519, 0), _127370))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1519, 0), _127370))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1519, 0), _127370))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1519, 0), _127370)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1519, 0), _127370)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1519, 0), _132956))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1519, 0), _132956))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1519, 0), _132956)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1519, 0), _132956)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1519, 0), _132956)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1519, 0)\=@='$COMMENT'(";;", 1519, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1519, 0), _127370)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1519, 0), _5942))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1519, 0), _5942))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1519, 0), _5942))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1519, 0), _5942))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1519, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1519, 0), _5942)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1519, 0), _155276))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1519, 0), _155276))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1519, 0), _155276)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1519, 0), _155276)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1519, 0), _155276)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1519, 0)\=@='$COMMENT'(";;", 1519, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1519, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1519, 0)\=@='$COMMENT'(";;", 1519, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1519, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1519, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1519, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1519, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1519, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1519, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1519, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1519, 0), _184054, [], _184056)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1519, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1519, 0), _184054, [], _184056)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1519, 0), _184054, [], _184056)
   Call: (258) [system] atom('$COMMENT'(";;", 1519, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1519, 0), _184054, [], _184056)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1519, 0), _184054, [], _184056)
   Call: (258) [system] compound('$COMMENT'(";;", 1519, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1519, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1519, 0), _193370, _193372)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1519, 0), '$COMMENT', [";;", 1519, 0])
^  Call: (258) [user] subst_vars([";;", 1519, 0], _195256, [], _184056)
^  Unify: (258) [user] subst_vars([";;", 1519, 0], [";;", 1519, 0], [], [])
   Call: (259) [system] var([";;", 1519, 0])
^  Redo: (258) [user] subst_vars([";;", 1519, 0], _195256, [], _184056)
^  Unify: (258) [user] subst_vars([";;", 1519, 0], [_198992|_198994], [], _184056)
^  Call: (259) [user] subst_vars(";;", _198992, [], _199932)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _198992, [], _199932)
^  Unify: (259) [user] subst_vars(";;", _198992, [], _199932)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _198992, [], _199932)
^  Unify: (259) [user] subst_vars(";;", _198992, [], _199932)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _198992, [], _199932)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1519, 0], _198994, [], _184056)
^  Unify: (259) [user] subst_vars([1519, 0], [1519, 0], [], [])
   Call: (260) [system] var([1519, 0])
^  Redo: (259) [user] subst_vars([1519, 0], _198994, [], _184056)
^  Unify: (259) [user] subst_vars([1519, 0], [_214864|_214866], [], _184056)
^  Call: (260) [user] subst_vars(1519, _214864, [], _215804)
^  Unify: (260) [user] subst_vars(1519, 1519, [], [])
   Call: (261) [system] var(1519)
^  Redo: (260) [user] subst_vars(1519, _214864, [], _215804)
^  Unify: (260) [user] subst_vars(1519, _214864, [], _215804)
   Call: (261) [system] atom(1519)
^  Redo: (260) [user] subst_vars(1519, _214864, [], _215804)
^  Unify: (260) [user] subst_vars(1519, _214864, [], _215804)
   Call: (261) [system] compound(1519)
^  Redo: (260) [user] subst_vars(1519, _214864, [], _215804)
^  Unify: (260) [user] subst_vars(1519, 1519, [], [])
^  Exit: (260) [user] subst_vars(1519, 1519, [], [])
^  Call: (260) [user] subst_vars([0], _214866, [], _184056)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _214866, [], _184056)
^  Unify: (260) [user] subst_vars([0], [_230736|_230738], [], _184056)
^  Call: (261) [user] subst_vars(0, _230736, [], _231676)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _230736, [], _231676)
^  Unify: (261) [user] subst_vars(0, _230736, [], _231676)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _230736, [], _231676)
^  Unify: (261) [user] subst_vars(0, _230736, [], _231676)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _230736, [], _231676)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _230738, [], _184056)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _230738, [], _184056)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1519, 0], [1519, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1519, 0], [";;", 1519, 0], [], [])
   Call: (258) [system] compound_name_arguments(_184054, '$COMMENT', [";;", 1519, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1519, 0), '$COMMENT', [";;", 1519, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1519, 0), '$COMMENT'(";;", 1519, 0), [], [])
   Call: (257) [system] _254094=metta_file_buffer(+, '$COMMENT'(";;", 1519, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1519, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1519, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1519, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1519, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1519, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1519, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1519, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1519, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1520, 0, 54664, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$stream_position'(54664, 1520, 0, 54698)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _306818))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _306818))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _306818)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _306818)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _306818)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _306818)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _312430))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _312430))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _312430))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _312430))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _312430)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _312430)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _318016))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _318016))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _318016)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _318016)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _318016)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _318016)
   Call: (270) [system] var('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _318016)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$VAR'(_325476))
   Call: (270) [system] atom('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _318016)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _318016)
   Call: (270) [system] '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _318016)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _318016)
   Call: (270) [system] '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _318016)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _318016)
   Call: (270) [system] '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0)==[_334756, _334762]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _318016)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _318016)
   Call: (270) [system] is_list('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _318016)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _318016)
   Call: (270) [system] string('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _318016)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _318016)
   Call: (270) [system] compound('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
   Exit: (270) [system] compound('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _344958, _344960)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT', [";;    impl Grounded for SomeGndAtom {", 1520, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;    impl Grounded for SomeGndAtom {", 1520, 0], _348700)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;    impl Grounded for SomeGndAtom {", 1520, 0], _348700)
   Call: (271) [apply] apply:maplist_([";;    impl Grounded for SomeGndAtom {", 1520, 0], _348700, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;    impl Grounded for SomeGndAtom {", 1520, 0], [_351518|_351520], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;    impl Grounded for SomeGndAtom {", _351518)
^  Unify: (272) [user] mfix_vars1(";;    impl Grounded for SomeGndAtom {", _351518)
   Call: (273) [system] var(";;    impl Grounded for SomeGndAtom {")
^  Redo: (272) [user] mfix_vars1(";;    impl Grounded for SomeGndAtom {", _351518)
^  Unify: (272) [user] mfix_vars1(";;    impl Grounded for SomeGndAtom {", '$VAR'(_356164))
   Call: (273) [system] atom(";;    impl Grounded for SomeGndAtom {")
^  Redo: (272) [user] mfix_vars1(";;    impl Grounded for SomeGndAtom {", _351518)
^  Unify: (272) [user] mfix_vars1(";;    impl Grounded for SomeGndAtom {", _351518)
   Call: (273) [system] ";;    impl Grounded for SomeGndAtom {"==true
^  Redo: (272) [user] mfix_vars1(";;    impl Grounded for SomeGndAtom {", _351518)
^  Unify: (272) [user] mfix_vars1(";;    impl Grounded for SomeGndAtom {", _351518)
   Call: (273) [system] ";;    impl Grounded for SomeGndAtom {"==false
^  Redo: (272) [user] mfix_vars1(";;    impl Grounded for SomeGndAtom {", _351518)
^  Unify: (272) [user] mfix_vars1(";;    impl Grounded for SomeGndAtom {", _351518)
   Call: (273) [system] ";;    impl Grounded for SomeGndAtom {"==[_365444, _365450]
^  Redo: (272) [user] mfix_vars1(";;    impl Grounded for SomeGndAtom {", _351518)
^  Unify: (272) [user] mfix_vars1(";;    impl Grounded for SomeGndAtom {", _351518)
   Call: (273) [system] is_list(";;    impl Grounded for SomeGndAtom {")
^  Redo: (272) [user] mfix_vars1(";;    impl Grounded for SomeGndAtom {", _351518)
^  Unify: (272) [user] mfix_vars1(";;    impl Grounded for SomeGndAtom {", _351518)
   Call: (273) [system] string(";;    impl Grounded for SomeGndAtom {")
   Exit: (273) [system] string(";;    impl Grounded for SomeGndAtom {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;    impl Grounded for SomeGndAtom {", _351518)
^  Unify: (272) [user] mfix_vars1(";;    impl Grounded for SomeGndAtom {", _351518)
   Call: (273) [system] compound(";;    impl Grounded for SomeGndAtom {")
^  Redo: (272) [user] mfix_vars1(";;    impl Grounded for SomeGndAtom {", _351518)
^  Unify: (272) [user] mfix_vars1(";;    impl Grounded for SomeGndAtom {", _351518)
^  Call: (273) [user] symbol(";;    impl Grounded for SomeGndAtom {")
^  Unify: (273) [user] symbol(";;    impl Grounded for SomeGndAtom {")
   Call: (274) [system] atom(";;    impl Grounded for SomeGndAtom {")
   Fail: (274) [system] atom(";;    impl Grounded for SomeGndAtom {")
^  Fail: (273) [user] symbol(";;    impl Grounded for SomeGndAtom {")
^  Redo: (272) [user] mfix_vars1(";;    impl Grounded for SomeGndAtom {", _351518)
   Call: (273) [system] ";;    impl Grounded for SomeGndAtom {"=_351518
   Exit: (273) [system] ";;    impl Grounded for SomeGndAtom {"=";;    impl Grounded for SomeGndAtom {"
^  Exit: (272) [user] mfix_vars1(";;    impl Grounded for SomeGndAtom {", ";;    impl Grounded for SomeGndAtom {")
   Call: (272) [apply] apply:maplist_([1520, 0], _351520, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1520, 0], [_389516|_389518], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1520, _389516)
^  Unify: (273) [user] mfix_vars1(1520, _389516)
   Call: (274) [system] var(1520)
^  Redo: (273) [user] mfix_vars1(1520, _389516)
^  Unify: (273) [user] mfix_vars1(1520, '$VAR'(_394162))
   Call: (274) [system] atom(1520)
^  Redo: (273) [user] mfix_vars1(1520, _389516)
^  Unify: (273) [user] mfix_vars1(1520, _389516)
   Call: (274) [system] 1520==true
^  Redo: (273) [user] mfix_vars1(1520, _389516)
^  Unify: (273) [user] mfix_vars1(1520, _389516)
   Call: (274) [system] 1520==false
^  Redo: (273) [user] mfix_vars1(1520, _389516)
^  Unify: (273) [user] mfix_vars1(1520, _389516)
   Call: (274) [system] 1520==[_403442, _403448]
^  Redo: (273) [user] mfix_vars1(1520, _389516)
^  Unify: (273) [user] mfix_vars1(1520, _389516)
   Call: (274) [system] is_list(1520)
^  Redo: (273) [user] mfix_vars1(1520, _389516)
^  Unify: (273) [user] mfix_vars1(1520, _389516)
   Call: (274) [system] string(1520)
^  Redo: (273) [user] mfix_vars1(1520, _389516)
^  Unify: (273) [user] mfix_vars1(1520, _389516)
   Call: (274) [system] compound(1520)
^  Redo: (273) [user] mfix_vars1(1520, _389516)
^  Unify: (273) [user] mfix_vars1(1520, _389516)
^  Call: (274) [user] symbol(1520)
^  Unify: (274) [user] symbol(1520)
   Call: (275) [system] atom(1520)
   Fail: (275) [system] atom(1520)
^  Fail: (274) [user] symbol(1520)
^  Redo: (273) [user] mfix_vars1(1520, _389516)
   Call: (274) [system] 1520=_389516
   Exit: (274) [system] 1520=1520
^  Exit: (273) [user] mfix_vars1(1520, 1520)
   Call: (273) [apply] apply:maplist_([0], _389518, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_423842|_423844], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _423842)
^  Unify: (274) [user] mfix_vars1(0, _423842)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _423842)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_428488))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _423842)
^  Unify: (274) [user] mfix_vars1(0, _423842)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _423842)
^  Unify: (274) [user] mfix_vars1(0, _423842)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _423842)
^  Unify: (274) [user] mfix_vars1(0, _423842)
   Call: (275) [system] 0==[_437768, _437774]
^  Redo: (274) [user] mfix_vars1(0, _423842)
^  Unify: (274) [user] mfix_vars1(0, _423842)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _423842)
^  Unify: (274) [user] mfix_vars1(0, _423842)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _423842)
^  Unify: (274) [user] mfix_vars1(0, _423842)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _423842)
^  Unify: (274) [user] mfix_vars1(0, _423842)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _423842)
   Call: (275) [system] 0=_423842
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _423844, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1520, 0], [1520, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;    impl Grounded for SomeGndAtom {", 1520, 0], [";;    impl Grounded for SomeGndAtom {", 1520, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;    impl Grounded for SomeGndAtom {", 1520, 0], [";;    impl Grounded for SomeGndAtom {", 1520, 0])
   Call: (270) [system] compound_name_arguments(_318016, '$COMMENT', [";;    impl Grounded for SomeGndAtom {", 1520, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT', [";;    impl Grounded for SomeGndAtom {", 1520, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0)))
   Call: (267) [system] '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0)\=@='$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _312430)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _474016))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _474016))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _474016))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _474016))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _474016)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _474016)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _479602))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _479602))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _479602)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _479602)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _479602)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0)))
   Call: (267) [system] '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0)\=@='$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _474016)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _306818))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _306818))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _306818))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _306818))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _306818)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _306818)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _501922))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _501922))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _501922)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _501922)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _501922)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0)))
   Call: (267) [system] '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0)\=@='$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _306818)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0)))
   Call: (261) [system] '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0)\=@='$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _12760, [], _12762)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _12760, [], _12762)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _12760, [], _12762)
   Call: (258) [system] atom('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _12760, [], _12762)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _12760, [], _12762)
   Call: (258) [system] compound('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
   Exit: (258) [system] compound('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), _22076, _22078)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT', [";;    impl Grounded for SomeGndAtom {", 1520, 0])
^  Call: (258) [user] subst_vars([";;    impl Grounded for SomeGndAtom {", 1520, 0], _23962, [], _12762)
^  Unify: (258) [user] subst_vars([";;    impl Grounded for SomeGndAtom {", 1520, 0], [";;    impl Grounded for SomeGndAtom {", 1520, 0], [], [])
   Call: (259) [system] var([";;    impl Grounded for SomeGndAtom {", 1520, 0])
^  Redo: (258) [user] subst_vars([";;    impl Grounded for SomeGndAtom {", 1520, 0], _23962, [], _12762)
^  Unify: (258) [user] subst_vars([";;    impl Grounded for SomeGndAtom {", 1520, 0], [_27698|_27700], [], _12762)
^  Call: (259) [user] subst_vars(";;    impl Grounded for SomeGndAtom {", _27698, [], _28638)
^  Unify: (259) [user] subst_vars(";;    impl Grounded for SomeGndAtom {", ";;    impl Grounded for SomeGndAtom {", [], [])
   Call: (260) [system] var(";;    impl Grounded for SomeGndAtom {")
^  Redo: (259) [user] subst_vars(";;    impl Grounded for SomeGndAtom {", _27698, [], _28638)
^  Unify: (259) [user] subst_vars(";;    impl Grounded for SomeGndAtom {", _27698, [], _28638)
   Call: (260) [system] atom(";;    impl Grounded for SomeGndAtom {")
^  Redo: (259) [user] subst_vars(";;    impl Grounded for SomeGndAtom {", _27698, [], _28638)
^  Unify: (259) [user] subst_vars(";;    impl Grounded for SomeGndAtom {", _27698, [], _28638)
   Call: (260) [system] compound(";;    impl Grounded for SomeGndAtom {")
^  Redo: (259) [user] subst_vars(";;    impl Grounded for SomeGndAtom {", _27698, [], _28638)
^  Unify: (259) [user] subst_vars(";;    impl Grounded for SomeGndAtom {", ";;    impl Grounded for SomeGndAtom {", [], [])
^  Exit: (259) [user] subst_vars(";;    impl Grounded for SomeGndAtom {", ";;    impl Grounded for SomeGndAtom {", [], [])
^  Call: (259) [user] subst_vars([1520, 0], _27700, [], _12762)
^  Unify: (259) [user] subst_vars([1520, 0], [1520, 0], [], [])
   Call: (260) [system] var([1520, 0])
^  Redo: (259) [user] subst_vars([1520, 0], _27700, [], _12762)
^  Unify: (259) [user] subst_vars([1520, 0], [_43570|_43572], [], _12762)
^  Call: (260) [user] subst_vars(1520, _43570, [], _44510)
^  Unify: (260) [user] subst_vars(1520, 1520, [], [])
   Call: (261) [system] var(1520)
^  Redo: (260) [user] subst_vars(1520, _43570, [], _44510)
^  Unify: (260) [user] subst_vars(1520, _43570, [], _44510)
   Call: (261) [system] atom(1520)
^  Redo: (260) [user] subst_vars(1520, _43570, [], _44510)
^  Unify: (260) [user] subst_vars(1520, _43570, [], _44510)
   Call: (261) [system] compound(1520)
^  Redo: (260) [user] subst_vars(1520, _43570, [], _44510)
^  Unify: (260) [user] subst_vars(1520, 1520, [], [])
^  Exit: (260) [user] subst_vars(1520, 1520, [], [])
^  Call: (260) [user] subst_vars([0], _43572, [], _12762)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _43572, [], _12762)
^  Unify: (260) [user] subst_vars([0], [_59442|_59444], [], _12762)
^  Call: (261) [user] subst_vars(0, _59442, [], _60382)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _59442, [], _60382)
^  Unify: (261) [user] subst_vars(0, _59442, [], _60382)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _59442, [], _60382)
^  Unify: (261) [user] subst_vars(0, _59442, [], _60382)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _59442, [], _60382)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _59444, [], _12762)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _59444, [], _12762)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1520, 0], [1520, 0], [], [])
^  Exit: (258) [user] subst_vars([";;    impl Grounded for SomeGndAtom {", 1520, 0], [";;    impl Grounded for SomeGndAtom {", 1520, 0], [], [])
   Call: (258) [system] compound_name_arguments(_12760, '$COMMENT', [";;    impl Grounded for SomeGndAtom {", 1520, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT', [";;    impl Grounded for SomeGndAtom {", 1520, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), [], [])
   Call: (257) [system] _82800=metta_file_buffer(+, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;    impl Grounded for SomeGndAtom {", 1520, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1521, 0, 54702, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$stream_position'(54702, 1521, 0, 54736)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _135524))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _135524))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _135524)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _135524)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _135524)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _135524)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _141136))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _141136))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _141136))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _141136))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _141136)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _141136)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _146722))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _146722))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _146722)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _146722)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _146722)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _146722)
   Call: (270) [system] var('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _146722)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$VAR'(_154182))
   Call: (270) [system] atom('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _146722)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _146722)
   Call: (270) [system] '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _146722)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _146722)
   Call: (270) [system] '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _146722)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _146722)
   Call: (270) [system] '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0)==[_163462, _163468]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _146722)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _146722)
   Call: (270) [system] is_list('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _146722)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _146722)
   Call: (270) [system] string('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _146722)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _146722)
   Call: (270) [system] compound('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _173664, _173666)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT', [";;        fn type_(&self) -> Atom {", 1521, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        fn type_(&self) -> Atom {", 1521, 0], _177406)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        fn type_(&self) -> Atom {", 1521, 0], _177406)
   Call: (271) [apply] apply:maplist_([";;        fn type_(&self) -> Atom {", 1521, 0], _177406, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        fn type_(&self) -> Atom {", 1521, 0], [_180224|_180226], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        fn type_(&self) -> Atom {", _180224)
^  Unify: (272) [user] mfix_vars1(";;        fn type_(&self) -> Atom {", _180224)
   Call: (273) [system] var(";;        fn type_(&self) -> Atom {")
^  Redo: (272) [user] mfix_vars1(";;        fn type_(&self) -> Atom {", _180224)
^  Unify: (272) [user] mfix_vars1(";;        fn type_(&self) -> Atom {", '$VAR'(_184870))
   Call: (273) [system] atom(";;        fn type_(&self) -> Atom {")
^  Redo: (272) [user] mfix_vars1(";;        fn type_(&self) -> Atom {", _180224)
^  Unify: (272) [user] mfix_vars1(";;        fn type_(&self) -> Atom {", _180224)
   Call: (273) [system] ";;        fn type_(&self) -> Atom {"==true
^  Redo: (272) [user] mfix_vars1(";;        fn type_(&self) -> Atom {", _180224)
^  Unify: (272) [user] mfix_vars1(";;        fn type_(&self) -> Atom {", _180224)
   Call: (273) [system] ";;        fn type_(&self) -> Atom {"==false
^  Redo: (272) [user] mfix_vars1(";;        fn type_(&self) -> Atom {", _180224)
^  Unify: (272) [user] mfix_vars1(";;        fn type_(&self) -> Atom {", _180224)
   Call: (273) [system] ";;        fn type_(&self) -> Atom {"==[_194150, _194156]
^  Redo: (272) [user] mfix_vars1(";;        fn type_(&self) -> Atom {", _180224)
^  Unify: (272) [user] mfix_vars1(";;        fn type_(&self) -> Atom {", _180224)
   Call: (273) [system] is_list(";;        fn type_(&self) -> Atom {")
^  Redo: (272) [user] mfix_vars1(";;        fn type_(&self) -> Atom {", _180224)
^  Unify: (272) [user] mfix_vars1(";;        fn type_(&self) -> Atom {", _180224)
   Call: (273) [system] string(";;        fn type_(&self) -> Atom {")
   Exit: (273) [system] string(";;        fn type_(&self) -> Atom {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        fn type_(&self) -> Atom {", _180224)
^  Unify: (272) [user] mfix_vars1(";;        fn type_(&self) -> Atom {", _180224)
   Call: (273) [system] compound(";;        fn type_(&self) -> Atom {")
^  Redo: (272) [user] mfix_vars1(";;        fn type_(&self) -> Atom {", _180224)
^  Unify: (272) [user] mfix_vars1(";;        fn type_(&self) -> Atom {", _180224)
^  Call: (273) [user] symbol(";;        fn type_(&self) -> Atom {")
^  Unify: (273) [user] symbol(";;        fn type_(&self) -> Atom {")
   Call: (274) [system] atom(";;        fn type_(&self) -> Atom {")
   Fail: (274) [system] atom(";;        fn type_(&self) -> Atom {")
^  Fail: (273) [user] symbol(";;        fn type_(&self) -> Atom {")
^  Redo: (272) [user] mfix_vars1(";;        fn type_(&self) -> Atom {", _180224)
   Call: (273) [system] ";;        fn type_(&self) -> Atom {"=_180224
   Exit: (273) [system] ";;        fn type_(&self) -> Atom {"=";;        fn type_(&self) -> Atom {"
^  Exit: (272) [user] mfix_vars1(";;        fn type_(&self) -> Atom {", ";;        fn type_(&self) -> Atom {")
   Call: (272) [apply] apply:maplist_([1521, 0], _180226, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1521, 0], [_218222|_218224], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1521, _218222)
^  Unify: (273) [user] mfix_vars1(1521, _218222)
   Call: (274) [system] var(1521)
^  Redo: (273) [user] mfix_vars1(1521, _218222)
^  Unify: (273) [user] mfix_vars1(1521, '$VAR'(_222868))
   Call: (274) [system] atom(1521)
^  Redo: (273) [user] mfix_vars1(1521, _218222)
^  Unify: (273) [user] mfix_vars1(1521, _218222)
   Call: (274) [system] 1521==true
^  Redo: (273) [user] mfix_vars1(1521, _218222)
^  Unify: (273) [user] mfix_vars1(1521, _218222)
   Call: (274) [system] 1521==false
^  Redo: (273) [user] mfix_vars1(1521, _218222)
^  Unify: (273) [user] mfix_vars1(1521, _218222)
   Call: (274) [system] 1521==[_232148, _232154]
^  Redo: (273) [user] mfix_vars1(1521, _218222)
^  Unify: (273) [user] mfix_vars1(1521, _218222)
   Call: (274) [system] is_list(1521)
^  Redo: (273) [user] mfix_vars1(1521, _218222)
^  Unify: (273) [user] mfix_vars1(1521, _218222)
   Call: (274) [system] string(1521)
^  Redo: (273) [user] mfix_vars1(1521, _218222)
^  Unify: (273) [user] mfix_vars1(1521, _218222)
   Call: (274) [system] compound(1521)
^  Redo: (273) [user] mfix_vars1(1521, _218222)
^  Unify: (273) [user] mfix_vars1(1521, _218222)
^  Call: (274) [user] symbol(1521)
^  Unify: (274) [user] symbol(1521)
   Call: (275) [system] atom(1521)
   Fail: (275) [system] atom(1521)
^  Fail: (274) [user] symbol(1521)
^  Redo: (273) [user] mfix_vars1(1521, _218222)
   Call: (274) [system] 1521=_218222
   Exit: (274) [system] 1521=1521
^  Exit: (273) [user] mfix_vars1(1521, 1521)
   Call: (273) [apply] apply:maplist_([0], _218224, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_252548|_252550], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _252548)
^  Unify: (274) [user] mfix_vars1(0, _252548)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _252548)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_257194))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _252548)
^  Unify: (274) [user] mfix_vars1(0, _252548)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _252548)
^  Unify: (274) [user] mfix_vars1(0, _252548)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _252548)
^  Unify: (274) [user] mfix_vars1(0, _252548)
   Call: (275) [system] 0==[_266474, _266480]
^  Redo: (274) [user] mfix_vars1(0, _252548)
^  Unify: (274) [user] mfix_vars1(0, _252548)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _252548)
^  Unify: (274) [user] mfix_vars1(0, _252548)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _252548)
^  Unify: (274) [user] mfix_vars1(0, _252548)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _252548)
^  Unify: (274) [user] mfix_vars1(0, _252548)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _252548)
   Call: (275) [system] 0=_252548
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _252550, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1521, 0], [1521, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        fn type_(&self) -> Atom {", 1521, 0], [";;        fn type_(&self) -> Atom {", 1521, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        fn type_(&self) -> Atom {", 1521, 0], [";;        fn type_(&self) -> Atom {", 1521, 0])
   Call: (270) [system] compound_name_arguments(_146722, '$COMMENT', [";;        fn type_(&self) -> Atom {", 1521, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT', [";;        fn type_(&self) -> Atom {", 1521, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0)))
   Call: (267) [system] '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0)\=@='$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _141136)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _302722))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _302722))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _302722))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _302722))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _302722)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _302722)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _308308))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _308308))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _308308)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _308308)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _308308)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0)))
   Call: (267) [system] '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0)\=@='$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _302722)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _135524))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _135524))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _135524))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _135524))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _135524)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _135524)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _330628))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _330628))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _330628)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _330628)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _330628)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0)))
   Call: (267) [system] '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0)\=@='$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _135524)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0)))
   Call: (261) [system] '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0)\=@='$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _359406, [], _359408)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _359406, [], _359408)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _359406, [], _359408)
   Call: (258) [system] atom('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _359406, [], _359408)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _359406, [], _359408)
   Call: (258) [system] compound('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), _368722, _368724)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT', [";;        fn type_(&self) -> Atom {", 1521, 0])
^  Call: (258) [user] subst_vars([";;        fn type_(&self) -> Atom {", 1521, 0], _370608, [], _359408)
^  Unify: (258) [user] subst_vars([";;        fn type_(&self) -> Atom {", 1521, 0], [";;        fn type_(&self) -> Atom {", 1521, 0], [], [])
   Call: (259) [system] var([";;        fn type_(&self) -> Atom {", 1521, 0])
^  Redo: (258) [user] subst_vars([";;        fn type_(&self) -> Atom {", 1521, 0], _370608, [], _359408)
^  Unify: (258) [user] subst_vars([";;        fn type_(&self) -> Atom {", 1521, 0], [_374344|_374346], [], _359408)
^  Call: (259) [user] subst_vars(";;        fn type_(&self) -> Atom {", _374344, [], _375284)
^  Unify: (259) [user] subst_vars(";;        fn type_(&self) -> Atom {", ";;        fn type_(&self) -> Atom {", [], [])
   Call: (260) [system] var(";;        fn type_(&self) -> Atom {")
^  Redo: (259) [user] subst_vars(";;        fn type_(&self) -> Atom {", _374344, [], _375284)
^  Unify: (259) [user] subst_vars(";;        fn type_(&self) -> Atom {", _374344, [], _375284)
   Call: (260) [system] atom(";;        fn type_(&self) -> Atom {")
^  Redo: (259) [user] subst_vars(";;        fn type_(&self) -> Atom {", _374344, [], _375284)
^  Unify: (259) [user] subst_vars(";;        fn type_(&self) -> Atom {", _374344, [], _375284)
   Call: (260) [system] compound(";;        fn type_(&self) -> Atom {")
^  Redo: (259) [user] subst_vars(";;        fn type_(&self) -> Atom {", _374344, [], _375284)
^  Unify: (259) [user] subst_vars(";;        fn type_(&self) -> Atom {", ";;        fn type_(&self) -> Atom {", [], [])
^  Exit: (259) [user] subst_vars(";;        fn type_(&self) -> Atom {", ";;        fn type_(&self) -> Atom {", [], [])
^  Call: (259) [user] subst_vars([1521, 0], _374346, [], _359408)
^  Unify: (259) [user] subst_vars([1521, 0], [1521, 0], [], [])
   Call: (260) [system] var([1521, 0])
^  Redo: (259) [user] subst_vars([1521, 0], _374346, [], _359408)
^  Unify: (259) [user] subst_vars([1521, 0], [_390216|_390218], [], _359408)
^  Call: (260) [user] subst_vars(1521, _390216, [], _391156)
^  Unify: (260) [user] subst_vars(1521, 1521, [], [])
   Call: (261) [system] var(1521)
^  Redo: (260) [user] subst_vars(1521, _390216, [], _391156)
^  Unify: (260) [user] subst_vars(1521, _390216, [], _391156)
   Call: (261) [system] atom(1521)
^  Redo: (260) [user] subst_vars(1521, _390216, [], _391156)
^  Unify: (260) [user] subst_vars(1521, _390216, [], _391156)
   Call: (261) [system] compound(1521)
^  Redo: (260) [user] subst_vars(1521, _390216, [], _391156)
^  Unify: (260) [user] subst_vars(1521, 1521, [], [])
^  Exit: (260) [user] subst_vars(1521, 1521, [], [])
^  Call: (260) [user] subst_vars([0], _390218, [], _359408)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _390218, [], _359408)
^  Unify: (260) [user] subst_vars([0], [_406088|_406090], [], _359408)
^  Call: (261) [user] subst_vars(0, _406088, [], _407028)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _406088, [], _407028)
^  Unify: (261) [user] subst_vars(0, _406088, [], _407028)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _406088, [], _407028)
^  Unify: (261) [user] subst_vars(0, _406088, [], _407028)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _406088, [], _407028)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _406090, [], _359408)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _406090, [], _359408)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1521, 0], [1521, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        fn type_(&self) -> Atom {", 1521, 0], [";;        fn type_(&self) -> Atom {", 1521, 0], [], [])
   Call: (258) [system] compound_name_arguments(_359406, '$COMMENT', [";;        fn type_(&self) -> Atom {", 1521, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT', [";;        fn type_(&self) -> Atom {", 1521, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), [], [])
   Call: (257) [system] _429446=metta_file_buffer(+, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        fn type_(&self) -> Atom {", 1521, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1522, 0, 54738, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$stream_position'(54738, 1522, 0, 54772)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _482186))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _482186))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _482186)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _482186)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _482186)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _482186)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _487798))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _487798))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _487798))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _487798))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _487798)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _487798)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _493384))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _493384))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _493384)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _493384)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _493384)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _493384)
   Call: (270) [system] var('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _493384)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$VAR'(_500844))
   Call: (270) [system] atom('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _493384)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _493384)
   Call: (270) [system] '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _493384)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _493384)
   Call: (270) [system] '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _493384)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _493384)
   Call: (270) [system] '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0)==[_510124, _510130]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _493384)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _493384)
   Call: (270) [system] is_list('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _493384)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _493384)
   Call: (270) [system] string('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _493384)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _493384)
   Call: (270) [system] compound('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
   Exit: (270) [system] compound('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _520326, _520328)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT', [";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0], _6038)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0], _6038)
   Call: (271) [apply] apply:maplist_([";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0], _6038, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0], [_8810|_8812], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _8810)
^  Unify: (272) [user] mfix_vars1(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _8810)
   Call: (273) [system] var(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])")
^  Redo: (272) [user] mfix_vars1(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _8810)
^  Unify: (272) [user] mfix_vars1(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", '$VAR'(_13456))
   Call: (273) [system] atom(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])")
^  Redo: (272) [user] mfix_vars1(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _8810)
^  Unify: (272) [user] mfix_vars1(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _8810)
   Call: (273) [system] ";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])"==true
^  Redo: (272) [user] mfix_vars1(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _8810)
^  Unify: (272) [user] mfix_vars1(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _8810)
   Call: (273) [system] ";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])"==false
^  Redo: (272) [user] mfix_vars1(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _8810)
^  Unify: (272) [user] mfix_vars1(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _8810)
   Call: (273) [system] ";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])"==[_22736, _22742]
^  Redo: (272) [user] mfix_vars1(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _8810)
^  Unify: (272) [user] mfix_vars1(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _8810)
   Call: (273) [system] is_list(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])")
^  Redo: (272) [user] mfix_vars1(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _8810)
^  Unify: (272) [user] mfix_vars1(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _8810)
   Call: (273) [system] string(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])")
   Exit: (273) [system] string(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _8810)
^  Unify: (272) [user] mfix_vars1(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _8810)
   Call: (273) [system] compound(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])")
^  Redo: (272) [user] mfix_vars1(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _8810)
^  Unify: (272) [user] mfix_vars1(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _8810)
^  Call: (273) [user] symbol(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])")
^  Unify: (273) [user] symbol(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])")
   Call: (274) [system] atom(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])")
   Fail: (274) [system] atom(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])")
^  Fail: (273) [user] symbol(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])")
^  Redo: (272) [user] mfix_vars1(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _8810)
   Call: (273) [system] ";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])"=_8810
   Exit: (273) [system] ";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])"=";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])"
^  Exit: (272) [user] mfix_vars1(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", ";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])")
   Call: (272) [apply] apply:maplist_([1522, 0], _8812, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1522, 0], [_46808|_46810], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1522, _46808)
^  Unify: (273) [user] mfix_vars1(1522, _46808)
   Call: (274) [system] var(1522)
^  Redo: (273) [user] mfix_vars1(1522, _46808)
^  Unify: (273) [user] mfix_vars1(1522, '$VAR'(_51454))
   Call: (274) [system] atom(1522)
^  Redo: (273) [user] mfix_vars1(1522, _46808)
^  Unify: (273) [user] mfix_vars1(1522, _46808)
   Call: (274) [system] 1522==true
^  Redo: (273) [user] mfix_vars1(1522, _46808)
^  Unify: (273) [user] mfix_vars1(1522, _46808)
   Call: (274) [system] 1522==false
^  Redo: (273) [user] mfix_vars1(1522, _46808)
^  Unify: (273) [user] mfix_vars1(1522, _46808)
   Call: (274) [system] 1522==[_60734, _60740]
^  Redo: (273) [user] mfix_vars1(1522, _46808)
^  Unify: (273) [user] mfix_vars1(1522, _46808)
   Call: (274) [system] is_list(1522)
^  Redo: (273) [user] mfix_vars1(1522, _46808)
^  Unify: (273) [user] mfix_vars1(1522, _46808)
   Call: (274) [system] string(1522)
^  Redo: (273) [user] mfix_vars1(1522, _46808)
^  Unify: (273) [user] mfix_vars1(1522, _46808)
   Call: (274) [system] compound(1522)
^  Redo: (273) [user] mfix_vars1(1522, _46808)
^  Unify: (273) [user] mfix_vars1(1522, _46808)
^  Call: (274) [user] symbol(1522)
^  Unify: (274) [user] symbol(1522)
   Call: (275) [system] atom(1522)
   Fail: (275) [system] atom(1522)
^  Fail: (274) [user] symbol(1522)
^  Redo: (273) [user] mfix_vars1(1522, _46808)
   Call: (274) [system] 1522=_46808
   Exit: (274) [system] 1522=1522
^  Exit: (273) [user] mfix_vars1(1522, 1522)
   Call: (273) [apply] apply:maplist_([0], _46810, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_81134|_81136], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _81134)
^  Unify: (274) [user] mfix_vars1(0, _81134)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _81134)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_85780))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _81134)
^  Unify: (274) [user] mfix_vars1(0, _81134)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _81134)
^  Unify: (274) [user] mfix_vars1(0, _81134)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _81134)
^  Unify: (274) [user] mfix_vars1(0, _81134)
   Call: (275) [system] 0==[_95060, _95066]
^  Redo: (274) [user] mfix_vars1(0, _81134)
^  Unify: (274) [user] mfix_vars1(0, _81134)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _81134)
^  Unify: (274) [user] mfix_vars1(0, _81134)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _81134)
^  Unify: (274) [user] mfix_vars1(0, _81134)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _81134)
^  Unify: (274) [user] mfix_vars1(0, _81134)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _81134)
   Call: (275) [system] 0=_81134
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _81136, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1522, 0], [1522, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0], [";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0], [";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0])
   Call: (270) [system] compound_name_arguments(_6000, '$COMMENT', [";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT', [";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0)))
   Call: (267) [system] '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0)\=@='$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _5986)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _131308))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _131308))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _131308))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _131308))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _131308)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _131308)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _136894))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _136894))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _136894)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _136894)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _136894)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0)))
   Call: (267) [system] '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0)\=@='$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _131308)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _5966))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _5966))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _5966))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _5966))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _5966)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _5966)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _159214))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _159214))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _159214)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _159214)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _159214)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0)))
   Call: (267) [system] '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0)\=@='$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _5966)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0)))
   Call: (261) [system] '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0)\=@='$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _187992, [], _187994)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _187992, [], _187994)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _187992, [], _187994)
   Call: (258) [system] atom('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _187992, [], _187994)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _187992, [], _187994)
   Call: (258) [system] compound('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
   Exit: (258) [system] compound('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), _197308, _197310)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT', [";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0])
^  Call: (258) [user] subst_vars([";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0], _199194, [], _187994)
^  Unify: (258) [user] subst_vars([";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0], [";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0], [], [])
   Call: (259) [system] var([";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0])
^  Redo: (258) [user] subst_vars([";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0], _199194, [], _187994)
^  Unify: (258) [user] subst_vars([";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0], [_202930|_202932], [], _187994)
^  Call: (259) [user] subst_vars(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _202930, [], _203870)
^  Unify: (259) [user] subst_vars(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", ";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", [], [])
   Call: (260) [system] var(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])")
^  Redo: (259) [user] subst_vars(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _202930, [], _203870)
^  Unify: (259) [user] subst_vars(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _202930, [], _203870)
   Call: (260) [system] atom(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])")
^  Redo: (259) [user] subst_vars(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _202930, [], _203870)
^  Unify: (259) [user] subst_vars(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _202930, [], _203870)
   Call: (260) [system] compound(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])")
^  Redo: (259) [user] subst_vars(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", _202930, [], _203870)
^  Unify: (259) [user] subst_vars(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", ";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", [], [])
^  Exit: (259) [user] subst_vars(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", ";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", [], [])
^  Call: (259) [user] subst_vars([1522, 0], _202932, [], _187994)
^  Unify: (259) [user] subst_vars([1522, 0], [1522, 0], [], [])
   Call: (260) [system] var([1522, 0])
^  Redo: (259) [user] subst_vars([1522, 0], _202932, [], _187994)
^  Unify: (259) [user] subst_vars([1522, 0], [_218802|_218804], [], _187994)
^  Call: (260) [user] subst_vars(1522, _218802, [], _219742)
^  Unify: (260) [user] subst_vars(1522, 1522, [], [])
   Call: (261) [system] var(1522)
^  Redo: (260) [user] subst_vars(1522, _218802, [], _219742)
^  Unify: (260) [user] subst_vars(1522, _218802, [], _219742)
   Call: (261) [system] atom(1522)
^  Redo: (260) [user] subst_vars(1522, _218802, [], _219742)
^  Unify: (260) [user] subst_vars(1522, _218802, [], _219742)
   Call: (261) [system] compound(1522)
^  Redo: (260) [user] subst_vars(1522, _218802, [], _219742)
^  Unify: (260) [user] subst_vars(1522, 1522, [], [])
^  Exit: (260) [user] subst_vars(1522, 1522, [], [])
^  Call: (260) [user] subst_vars([0], _218804, [], _187994)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _218804, [], _187994)
^  Unify: (260) [user] subst_vars([0], [_234674|_234676], [], _187994)
^  Call: (261) [user] subst_vars(0, _234674, [], _235614)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _234674, [], _235614)
^  Unify: (261) [user] subst_vars(0, _234674, [], _235614)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _234674, [], _235614)
^  Unify: (261) [user] subst_vars(0, _234674, [], _235614)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _234674, [], _235614)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _234676, [], _187994)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _234676, [], _187994)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1522, 0], [1522, 0], [], [])
^  Exit: (258) [user] subst_vars([";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0], [";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0], [], [])
   Call: (258) [system] compound_name_arguments(_187992, '$COMMENT', [";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT', [";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), [], [])
   Call: (257) [system] _258032=metta_file_buffer(+, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;            Atom::expr([ARROW_SYMBOL, sym!(\"Arg1Type\"), sym!(\"Arg2Type\"), sym!(\"ReturnType\")])", 1522, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1523, 0, 54835, '$COMMENT'(";;        }", 1523, 0), '$stream_position'(54835, 1523, 0, 54869)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        }", 1523, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        }", 1523, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;        }", 1523, 0), _310750))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        }", 1523, 0), _310750))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;        }", 1523, 0), _310750)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        }", 1523, 0), _310750)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;        }", 1523, 0), _310750)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;        }", 1523, 0), _310750)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;        }", 1523, 0), _316362))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        }", 1523, 0), _316362))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;        }", 1523, 0), _316362))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        }", 1523, 0), _316362))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        }", 1523, 0), _316362)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        }", 1523, 0), _316362)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;        }", 1523, 0), _321948))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        }", 1523, 0), _321948))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;        }", 1523, 0), _321948)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        }", 1523, 0), _321948)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1523, 0), _321948)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1523, 0), _321948)
   Call: (270) [system] var('$COMMENT'(";;        }", 1523, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1523, 0), _321948)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1523, 0), '$VAR'(_329408))
   Call: (270) [system] atom('$COMMENT'(";;        }", 1523, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1523, 0), _321948)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1523, 0), _321948)
   Call: (270) [system] '$COMMENT'(";;        }", 1523, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1523, 0), _321948)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1523, 0), _321948)
   Call: (270) [system] '$COMMENT'(";;        }", 1523, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1523, 0), _321948)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1523, 0), _321948)
   Call: (270) [system] '$COMMENT'(";;        }", 1523, 0)==[_338688, _338694]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1523, 0), _321948)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1523, 0), _321948)
   Call: (270) [system] is_list('$COMMENT'(";;        }", 1523, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1523, 0), _321948)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1523, 0), _321948)
   Call: (270) [system] string('$COMMENT'(";;        }", 1523, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1523, 0), _321948)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1523, 0), _321948)
   Call: (270) [system] compound('$COMMENT'(";;        }", 1523, 0))
   Exit: (270) [system] compound('$COMMENT'(";;        }", 1523, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;        }", 1523, 0), _348890, _348892)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        }", 1523, 0), '$COMMENT', [";;        }", 1523, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;        }", 1523, 0], _352632)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;        }", 1523, 0], _352632)
   Call: (271) [apply] apply:maplist_([";;        }", 1523, 0], _352632, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;        }", 1523, 0], [_355450|_355452], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;        }", _355450)
^  Unify: (272) [user] mfix_vars1(";;        }", _355450)
   Call: (273) [system] var(";;        }")
^  Redo: (272) [user] mfix_vars1(";;        }", _355450)
^  Unify: (272) [user] mfix_vars1(";;        }", '$VAR'(_360096))
   Call: (273) [system] atom(";;        }")
^  Redo: (272) [user] mfix_vars1(";;        }", _355450)
^  Unify: (272) [user] mfix_vars1(";;        }", _355450)
   Call: (273) [system] ";;        }"==true
^  Redo: (272) [user] mfix_vars1(";;        }", _355450)
^  Unify: (272) [user] mfix_vars1(";;        }", _355450)
   Call: (273) [system] ";;        }"==false
^  Redo: (272) [user] mfix_vars1(";;        }", _355450)
^  Unify: (272) [user] mfix_vars1(";;        }", _355450)
   Call: (273) [system] ";;        }"==[_369376, _369382]
^  Redo: (272) [user] mfix_vars1(";;        }", _355450)
^  Unify: (272) [user] mfix_vars1(";;        }", _355450)
   Call: (273) [system] is_list(";;        }")
^  Redo: (272) [user] mfix_vars1(";;        }", _355450)
^  Unify: (272) [user] mfix_vars1(";;        }", _355450)
   Call: (273) [system] string(";;        }")
   Exit: (273) [system] string(";;        }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;        }", _355450)
^  Unify: (272) [user] mfix_vars1(";;        }", _355450)
   Call: (273) [system] compound(";;        }")
^  Redo: (272) [user] mfix_vars1(";;        }", _355450)
^  Unify: (272) [user] mfix_vars1(";;        }", _355450)
^  Call: (273) [user] symbol(";;        }")
^  Unify: (273) [user] symbol(";;        }")
   Call: (274) [system] atom(";;        }")
   Fail: (274) [system] atom(";;        }")
^  Fail: (273) [user] symbol(";;        }")
^  Redo: (272) [user] mfix_vars1(";;        }", _355450)
   Call: (273) [system] ";;        }"=_355450
   Exit: (273) [system] ";;        }"=";;        }"
^  Exit: (272) [user] mfix_vars1(";;        }", ";;        }")
   Call: (272) [apply] apply:maplist_([1523, 0], _355452, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1523, 0], [_393448|_393450], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1523, _393448)
^  Unify: (273) [user] mfix_vars1(1523, _393448)
   Call: (274) [system] var(1523)
^  Redo: (273) [user] mfix_vars1(1523, _393448)
^  Unify: (273) [user] mfix_vars1(1523, '$VAR'(_398094))
   Call: (274) [system] atom(1523)
^  Redo: (273) [user] mfix_vars1(1523, _393448)
^  Unify: (273) [user] mfix_vars1(1523, _393448)
   Call: (274) [system] 1523==true
^  Redo: (273) [user] mfix_vars1(1523, _393448)
^  Unify: (273) [user] mfix_vars1(1523, _393448)
   Call: (274) [system] 1523==false
^  Redo: (273) [user] mfix_vars1(1523, _393448)
^  Unify: (273) [user] mfix_vars1(1523, _393448)
   Call: (274) [system] 1523==[_407374, _407380]
^  Redo: (273) [user] mfix_vars1(1523, _393448)
^  Unify: (273) [user] mfix_vars1(1523, _393448)
   Call: (274) [system] is_list(1523)
^  Redo: (273) [user] mfix_vars1(1523, _393448)
^  Unify: (273) [user] mfix_vars1(1523, _393448)
   Call: (274) [system] string(1523)
^  Redo: (273) [user] mfix_vars1(1523, _393448)
^  Unify: (273) [user] mfix_vars1(1523, _393448)
   Call: (274) [system] compound(1523)
^  Redo: (273) [user] mfix_vars1(1523, _393448)
^  Unify: (273) [user] mfix_vars1(1523, _393448)
^  Call: (274) [user] symbol(1523)
^  Unify: (274) [user] symbol(1523)
   Call: (275) [system] atom(1523)
   Fail: (275) [system] atom(1523)
^  Fail: (274) [user] symbol(1523)
^  Redo: (273) [user] mfix_vars1(1523, _393448)
   Call: (274) [system] 1523=_393448
   Exit: (274) [system] 1523=1523
^  Exit: (273) [user] mfix_vars1(1523, 1523)
   Call: (273) [apply] apply:maplist_([0], _393450, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_427774|_427776], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _427774)
^  Unify: (274) [user] mfix_vars1(0, _427774)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _427774)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_432420))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _427774)
^  Unify: (274) [user] mfix_vars1(0, _427774)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _427774)
^  Unify: (274) [user] mfix_vars1(0, _427774)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _427774)
^  Unify: (274) [user] mfix_vars1(0, _427774)
   Call: (275) [system] 0==[_441700, _441706]
^  Redo: (274) [user] mfix_vars1(0, _427774)
^  Unify: (274) [user] mfix_vars1(0, _427774)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _427774)
^  Unify: (274) [user] mfix_vars1(0, _427774)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _427774)
^  Unify: (274) [user] mfix_vars1(0, _427774)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _427774)
^  Unify: (274) [user] mfix_vars1(0, _427774)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _427774)
   Call: (275) [system] 0=_427774
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _427776, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1523, 0], [1523, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;        }", 1523, 0], [";;        }", 1523, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;        }", 1523, 0], [";;        }", 1523, 0])
   Call: (270) [system] compound_name_arguments(_321948, '$COMMENT', [";;        }", 1523, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;        }", 1523, 0), '$COMMENT', [";;        }", 1523, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0)))
   Call: (267) [system] '$COMMENT'(";;        }", 1523, 0)\=@='$COMMENT'(";;        }", 1523, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        }", 1523, 0), _316362)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;        }", 1523, 0), _477948))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        }", 1523, 0), _477948))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;        }", 1523, 0), _477948))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        }", 1523, 0), _477948))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;        }", 1523, 0), _477948)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        }", 1523, 0), _477948)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;        }", 1523, 0), _483534))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        }", 1523, 0), _483534))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;        }", 1523, 0), _483534)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        }", 1523, 0), _483534)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;        }", 1523, 0), _483534)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0)))
   Call: (267) [system] '$COMMENT'(";;        }", 1523, 0)\=@='$COMMENT'(";;        }", 1523, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;        }", 1523, 0), _477948)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;        }", 1523, 0), _310750))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        }", 1523, 0), _310750))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;        }", 1523, 0), _310750))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        }", 1523, 0), _310750))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;        }", 1523, 0), _310750)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        }", 1523, 0), _310750)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;        }", 1523, 0), _505854))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        }", 1523, 0), _505854))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;        }", 1523, 0), _505854)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        }", 1523, 0), _505854)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;        }", 1523, 0), _505854)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0)))
   Call: (267) [system] '$COMMENT'(";;        }", 1523, 0)\=@='$COMMENT'(";;        }", 1523, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;        }", 1523, 0), _310750)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0)))
   Call: (261) [system] '$COMMENT'(";;        }", 1523, 0)\=@='$COMMENT'(";;        }", 1523, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        }", 1523, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        }", 1523, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        }", 1523, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        }", 1523, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;        }", 1523, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;        }", 1523, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;        }", 1523, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;        }", 1523, 0), _16720, [], _16722)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;        }", 1523, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        }", 1523, 0), _16720, [], _16722)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        }", 1523, 0), _16720, [], _16722)
   Call: (258) [system] atom('$COMMENT'(";;        }", 1523, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;        }", 1523, 0), _16720, [], _16722)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;        }", 1523, 0), _16720, [], _16722)
   Call: (258) [system] compound('$COMMENT'(";;        }", 1523, 0))
   Exit: (258) [system] compound('$COMMENT'(";;        }", 1523, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;        }", 1523, 0), _26036, _26038)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        }", 1523, 0), '$COMMENT', [";;        }", 1523, 0])
^  Call: (258) [user] subst_vars([";;        }", 1523, 0], _27922, [], _16722)
^  Unify: (258) [user] subst_vars([";;        }", 1523, 0], [";;        }", 1523, 0], [], [])
   Call: (259) [system] var([";;        }", 1523, 0])
^  Redo: (258) [user] subst_vars([";;        }", 1523, 0], _27922, [], _16722)
^  Unify: (258) [user] subst_vars([";;        }", 1523, 0], [_31658|_31660], [], _16722)
^  Call: (259) [user] subst_vars(";;        }", _31658, [], _32598)
^  Unify: (259) [user] subst_vars(";;        }", ";;        }", [], [])
   Call: (260) [system] var(";;        }")
^  Redo: (259) [user] subst_vars(";;        }", _31658, [], _32598)
^  Unify: (259) [user] subst_vars(";;        }", _31658, [], _32598)
   Call: (260) [system] atom(";;        }")
^  Redo: (259) [user] subst_vars(";;        }", _31658, [], _32598)
^  Unify: (259) [user] subst_vars(";;        }", _31658, [], _32598)
   Call: (260) [system] compound(";;        }")
^  Redo: (259) [user] subst_vars(";;        }", _31658, [], _32598)
^  Unify: (259) [user] subst_vars(";;        }", ";;        }", [], [])
^  Exit: (259) [user] subst_vars(";;        }", ";;        }", [], [])
^  Call: (259) [user] subst_vars([1523, 0], _31660, [], _16722)
^  Unify: (259) [user] subst_vars([1523, 0], [1523, 0], [], [])
   Call: (260) [system] var([1523, 0])
^  Redo: (259) [user] subst_vars([1523, 0], _31660, [], _16722)
^  Unify: (259) [user] subst_vars([1523, 0], [_47530|_47532], [], _16722)
^  Call: (260) [user] subst_vars(1523, _47530, [], _48470)
^  Unify: (260) [user] subst_vars(1523, 1523, [], [])
   Call: (261) [system] var(1523)
^  Redo: (260) [user] subst_vars(1523, _47530, [], _48470)
^  Unify: (260) [user] subst_vars(1523, _47530, [], _48470)
   Call: (261) [system] atom(1523)
^  Redo: (260) [user] subst_vars(1523, _47530, [], _48470)
^  Unify: (260) [user] subst_vars(1523, _47530, [], _48470)
   Call: (261) [system] compound(1523)
^  Redo: (260) [user] subst_vars(1523, _47530, [], _48470)
^  Unify: (260) [user] subst_vars(1523, 1523, [], [])
^  Exit: (260) [user] subst_vars(1523, 1523, [], [])
^  Call: (260) [user] subst_vars([0], _47532, [], _16722)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _47532, [], _16722)
^  Unify: (260) [user] subst_vars([0], [_63402|_63404], [], _16722)
^  Call: (261) [user] subst_vars(0, _63402, [], _64342)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _63402, [], _64342)
^  Unify: (261) [user] subst_vars(0, _63402, [], _64342)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _63402, [], _64342)
^  Unify: (261) [user] subst_vars(0, _63402, [], _64342)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _63402, [], _64342)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _63404, [], _16722)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _63404, [], _16722)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1523, 0], [1523, 0], [], [])
^  Exit: (258) [user] subst_vars([";;        }", 1523, 0], [";;        }", 1523, 0], [], [])
   Call: (258) [system] compound_name_arguments(_16720, '$COMMENT', [";;        }", 1523, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;        }", 1523, 0), '$COMMENT', [";;        }", 1523, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;        }", 1523, 0), '$COMMENT'(";;        }", 1523, 0), [], [])
   Call: (257) [system] _86760=metta_file_buffer(+, '$COMMENT'(";;        }", 1523, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;        }", 1523, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;        }", 1523, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        }", 1523, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;        }", 1523, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        }", 1523, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        }", 1523, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        }", 1523, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;        }", 1523, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1524, 0, 54847, '$COMMENT'(";; }", 1524, 0), '$stream_position'(54847, 1524, 0, 54881)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1524, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1524, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; }", 1524, 0), _139476))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1524, 0), _139476))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; }", 1524, 0), _139476)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1524, 0), _139476)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1524, 0), _139476)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1524, 0), _139476)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; }", 1524, 0), _145088))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1524, 0), _145088))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1524, 0), _145088))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1524, 0), _145088))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1524, 0), _145088)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1524, 0), _145088)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; }", 1524, 0), _150674))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1524, 0), _150674))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; }", 1524, 0), _150674)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1524, 0), _150674)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; }", 1524, 0), _150674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1524, 0), _150674)
   Call: (270) [system] var('$COMMENT'(";; }", 1524, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1524, 0), _150674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1524, 0), '$VAR'(_158134))
   Call: (270) [system] atom('$COMMENT'(";; }", 1524, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1524, 0), _150674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1524, 0), _150674)
   Call: (270) [system] '$COMMENT'(";; }", 1524, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1524, 0), _150674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1524, 0), _150674)
   Call: (270) [system] '$COMMENT'(";; }", 1524, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1524, 0), _150674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1524, 0), _150674)
   Call: (270) [system] '$COMMENT'(";; }", 1524, 0)==[_167414, _167420]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1524, 0), _150674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1524, 0), _150674)
   Call: (270) [system] is_list('$COMMENT'(";; }", 1524, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1524, 0), _150674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1524, 0), _150674)
   Call: (270) [system] string('$COMMENT'(";; }", 1524, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1524, 0), _150674)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1524, 0), _150674)
   Call: (270) [system] compound('$COMMENT'(";; }", 1524, 0))
   Exit: (270) [system] compound('$COMMENT'(";; }", 1524, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1524, 0), _177616, _177618)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1524, 0), '$COMMENT', [";; }", 1524, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; }", 1524, 0], _181358)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1524, 0], _181358)
   Call: (271) [apply] apply:maplist_([";; }", 1524, 0], _181358, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; }", 1524, 0], [_184176|_184178], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; }", _184176)
^  Unify: (272) [user] mfix_vars1(";; }", _184176)
   Call: (273) [system] var(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _184176)
^  Unify: (272) [user] mfix_vars1(";; }", '$VAR'(_188822))
   Call: (273) [system] atom(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _184176)
^  Unify: (272) [user] mfix_vars1(";; }", _184176)
   Call: (273) [system] ";; }"==true
^  Redo: (272) [user] mfix_vars1(";; }", _184176)
^  Unify: (272) [user] mfix_vars1(";; }", _184176)
   Call: (273) [system] ";; }"==false
^  Redo: (272) [user] mfix_vars1(";; }", _184176)
^  Unify: (272) [user] mfix_vars1(";; }", _184176)
   Call: (273) [system] ";; }"==[_198102, _198108]
^  Redo: (272) [user] mfix_vars1(";; }", _184176)
^  Unify: (272) [user] mfix_vars1(";; }", _184176)
   Call: (273) [system] is_list(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _184176)
^  Unify: (272) [user] mfix_vars1(";; }", _184176)
   Call: (273) [system] string(";; }")
   Exit: (273) [system] string(";; }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; }", _184176)
^  Unify: (272) [user] mfix_vars1(";; }", _184176)
   Call: (273) [system] compound(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _184176)
^  Unify: (272) [user] mfix_vars1(";; }", _184176)
^  Call: (273) [user] symbol(";; }")
^  Unify: (273) [user] symbol(";; }")
   Call: (274) [system] atom(";; }")
   Fail: (274) [system] atom(";; }")
^  Fail: (273) [user] symbol(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _184176)
   Call: (273) [system] ";; }"=_184176
   Exit: (273) [system] ";; }"=";; }"
^  Exit: (272) [user] mfix_vars1(";; }", ";; }")
   Call: (272) [apply] apply:maplist_([1524, 0], _184178, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1524, 0], [_222174|_222176], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1524, _222174)
^  Unify: (273) [user] mfix_vars1(1524, _222174)
   Call: (274) [system] var(1524)
^  Redo: (273) [user] mfix_vars1(1524, _222174)
^  Unify: (273) [user] mfix_vars1(1524, '$VAR'(_226820))
   Call: (274) [system] atom(1524)
^  Redo: (273) [user] mfix_vars1(1524, _222174)
^  Unify: (273) [user] mfix_vars1(1524, _222174)
   Call: (274) [system] 1524==true
^  Redo: (273) [user] mfix_vars1(1524, _222174)
^  Unify: (273) [user] mfix_vars1(1524, _222174)
   Call: (274) [system] 1524==false
^  Redo: (273) [user] mfix_vars1(1524, _222174)
^  Unify: (273) [user] mfix_vars1(1524, _222174)
   Call: (274) [system] 1524==[_236100, _236106]
^  Redo: (273) [user] mfix_vars1(1524, _222174)
^  Unify: (273) [user] mfix_vars1(1524, _222174)
   Call: (274) [system] is_list(1524)
^  Redo: (273) [user] mfix_vars1(1524, _222174)
^  Unify: (273) [user] mfix_vars1(1524, _222174)
   Call: (274) [system] string(1524)
^  Redo: (273) [user] mfix_vars1(1524, _222174)
^  Unify: (273) [user] mfix_vars1(1524, _222174)
   Call: (274) [system] compound(1524)
^  Redo: (273) [user] mfix_vars1(1524, _222174)
^  Unify: (273) [user] mfix_vars1(1524, _222174)
^  Call: (274) [user] symbol(1524)
^  Unify: (274) [user] symbol(1524)
   Call: (275) [system] atom(1524)
   Fail: (275) [system] atom(1524)
^  Fail: (274) [user] symbol(1524)
^  Redo: (273) [user] mfix_vars1(1524, _222174)
   Call: (274) [system] 1524=_222174
   Exit: (274) [system] 1524=1524
^  Exit: (273) [user] mfix_vars1(1524, 1524)
   Call: (273) [apply] apply:maplist_([0], _222176, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_256500|_256502], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _256500)
^  Unify: (274) [user] mfix_vars1(0, _256500)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _256500)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_261146))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _256500)
^  Unify: (274) [user] mfix_vars1(0, _256500)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _256500)
^  Unify: (274) [user] mfix_vars1(0, _256500)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _256500)
^  Unify: (274) [user] mfix_vars1(0, _256500)
   Call: (275) [system] 0==[_270426, _270432]
^  Redo: (274) [user] mfix_vars1(0, _256500)
^  Unify: (274) [user] mfix_vars1(0, _256500)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _256500)
^  Unify: (274) [user] mfix_vars1(0, _256500)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _256500)
^  Unify: (274) [user] mfix_vars1(0, _256500)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _256500)
^  Unify: (274) [user] mfix_vars1(0, _256500)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _256500)
   Call: (275) [system] 0=_256500
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _256502, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1524, 0], [1524, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; }", 1524, 0], [";; }", 1524, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1524, 0], [";; }", 1524, 0])
   Call: (270) [system] compound_name_arguments(_150674, '$COMMENT', [";; }", 1524, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1524, 0), '$COMMENT', [";; }", 1524, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1524, 0)\=@='$COMMENT'(";; }", 1524, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1524, 0), _145088)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; }", 1524, 0), _306674))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1524, 0), _306674))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1524, 0), _306674))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1524, 0), _306674))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1524, 0), _306674)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1524, 0), _306674)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; }", 1524, 0), _312260))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1524, 0), _312260))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; }", 1524, 0), _312260)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1524, 0), _312260)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; }", 1524, 0), _312260)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1524, 0)\=@='$COMMENT'(";; }", 1524, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1524, 0), _306674)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; }", 1524, 0), _139476))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1524, 0), _139476))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1524, 0), _139476))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1524, 0), _139476))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1524, 0), _139476)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1524, 0), _139476)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; }", 1524, 0), _334580))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1524, 0), _334580))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; }", 1524, 0), _334580)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1524, 0), _334580)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; }", 1524, 0), _334580)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1524, 0)\=@='$COMMENT'(";; }", 1524, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1524, 0), _139476)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0)))
   Call: (261) [system] '$COMMENT'(";; }", 1524, 0)\=@='$COMMENT'(";; }", 1524, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1524, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1524, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1524, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1524, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1524, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; }", 1524, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; }", 1524, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; }", 1524, 0), _363358, [], _363360)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; }", 1524, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1524, 0), _363358, [], _363360)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1524, 0), _363358, [], _363360)
   Call: (258) [system] atom('$COMMENT'(";; }", 1524, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1524, 0), _363358, [], _363360)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1524, 0), _363358, [], _363360)
   Call: (258) [system] compound('$COMMENT'(";; }", 1524, 0))
   Exit: (258) [system] compound('$COMMENT'(";; }", 1524, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1524, 0), _372674, _372676)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1524, 0), '$COMMENT', [";; }", 1524, 0])
^  Call: (258) [user] subst_vars([";; }", 1524, 0], _374560, [], _363360)
^  Unify: (258) [user] subst_vars([";; }", 1524, 0], [";; }", 1524, 0], [], [])
   Call: (259) [system] var([";; }", 1524, 0])
^  Redo: (258) [user] subst_vars([";; }", 1524, 0], _374560, [], _363360)
^  Unify: (258) [user] subst_vars([";; }", 1524, 0], [_378296|_378298], [], _363360)
^  Call: (259) [user] subst_vars(";; }", _378296, [], _379236)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
   Call: (260) [system] var(";; }")
^  Redo: (259) [user] subst_vars(";; }", _378296, [], _379236)
^  Unify: (259) [user] subst_vars(";; }", _378296, [], _379236)
   Call: (260) [system] atom(";; }")
^  Redo: (259) [user] subst_vars(";; }", _378296, [], _379236)
^  Unify: (259) [user] subst_vars(";; }", _378296, [], _379236)
   Call: (260) [system] compound(";; }")
^  Redo: (259) [user] subst_vars(";; }", _378296, [], _379236)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Exit: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Call: (259) [user] subst_vars([1524, 0], _378298, [], _363360)
^  Unify: (259) [user] subst_vars([1524, 0], [1524, 0], [], [])
   Call: (260) [system] var([1524, 0])
^  Redo: (259) [user] subst_vars([1524, 0], _378298, [], _363360)
^  Unify: (259) [user] subst_vars([1524, 0], [_394168|_394170], [], _363360)
^  Call: (260) [user] subst_vars(1524, _394168, [], _395108)
^  Unify: (260) [user] subst_vars(1524, 1524, [], [])
   Call: (261) [system] var(1524)
^  Redo: (260) [user] subst_vars(1524, _394168, [], _395108)
^  Unify: (260) [user] subst_vars(1524, _394168, [], _395108)
   Call: (261) [system] atom(1524)
^  Redo: (260) [user] subst_vars(1524, _394168, [], _395108)
^  Unify: (260) [user] subst_vars(1524, _394168, [], _395108)
   Call: (261) [system] compound(1524)
^  Redo: (260) [user] subst_vars(1524, _394168, [], _395108)
^  Unify: (260) [user] subst_vars(1524, 1524, [], [])
^  Exit: (260) [user] subst_vars(1524, 1524, [], [])
^  Call: (260) [user] subst_vars([0], _394170, [], _363360)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _394170, [], _363360)
^  Unify: (260) [user] subst_vars([0], [_410040|_410042], [], _363360)
^  Call: (261) [user] subst_vars(0, _410040, [], _410980)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _410040, [], _410980)
^  Unify: (261) [user] subst_vars(0, _410040, [], _410980)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _410040, [], _410980)
^  Unify: (261) [user] subst_vars(0, _410040, [], _410980)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _410040, [], _410980)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _410042, [], _363360)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _410042, [], _363360)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1524, 0], [1524, 0], [], [])
^  Exit: (258) [user] subst_vars([";; }", 1524, 0], [";; }", 1524, 0], [], [])
   Call: (258) [system] compound_name_arguments(_363358, '$COMMENT', [";; }", 1524, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1524, 0), '$COMMENT', [";; }", 1524, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; }", 1524, 0), '$COMMENT'(";; }", 1524, 0), [], [])
   Call: (257) [system] _433398=metta_file_buffer(+, '$COMMENT'(";; }", 1524, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; }", 1524, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; }", 1524, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1524, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1524, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1524, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1524, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1524, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1524, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1525, 0, 54852, '$COMMENT'(";; Converted:", 1525, 0), '$stream_position'(54852, 1525, 0, 54886)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1525, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1525, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1525, 0), _486116))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1525, 0), _486116))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1525, 0), _486116)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1525, 0), _486116)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1525, 0), _486116)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1525, 0), _486116)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1525, 0), _491728))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1525, 0), _491728))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1525, 0), _491728))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1525, 0), _491728))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1525, 0), _491728)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1525, 0), _491728)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1525, 0), _497314))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1525, 0), _497314))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1525, 0), _497314)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1525, 0), _497314)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1525, 0), _497314)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1525, 0), _497314)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1525, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1525, 0), _497314)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1525, 0), '$VAR'(_504774))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1525, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1525, 0), _497314)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1525, 0), _497314)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1525, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1525, 0), _497314)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1525, 0), _497314)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1525, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1525, 0), _497314)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1525, 0), _497314)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1525, 0)==[_514054, _514060]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1525, 0), _497314)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1525, 0), _497314)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1525, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1525, 0), _497314)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1525, 0), _497314)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1525, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1525, 0), _497314)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1525, 0), _497314)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1525, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1525, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1525, 0), _6342, _6344)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1525, 0), '$COMMENT', [";; Converted:", 1525, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1525, 0], _10084)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1525, 0], _10084)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1525, 0], _10084, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1525, 0], [_12902|_12904], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _12902)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _12902)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _12902)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_17548))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _12902)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _12902)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _12902)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _12902)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _12902)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _12902)
   Call: (273) [system] ";; Converted:"==[_26828, _26834]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _12902)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _12902)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _12902)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _12902)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _12902)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _12902)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _12902)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _12902)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _12902)
   Call: (273) [system] ";; Converted:"=_12902
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1525, 0], _12904, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1525, 0], [_50900|_50902], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1525, _50900)
^  Unify: (273) [user] mfix_vars1(1525, _50900)
   Call: (274) [system] var(1525)
^  Redo: (273) [user] mfix_vars1(1525, _50900)
^  Unify: (273) [user] mfix_vars1(1525, '$VAR'(_55546))
   Call: (274) [system] atom(1525)
^  Redo: (273) [user] mfix_vars1(1525, _50900)
^  Unify: (273) [user] mfix_vars1(1525, _50900)
   Call: (274) [system] 1525==true
^  Redo: (273) [user] mfix_vars1(1525, _50900)
^  Unify: (273) [user] mfix_vars1(1525, _50900)
   Call: (274) [system] 1525==false
^  Redo: (273) [user] mfix_vars1(1525, _50900)
^  Unify: (273) [user] mfix_vars1(1525, _50900)
   Call: (274) [system] 1525==[_64826, _64832]
^  Redo: (273) [user] mfix_vars1(1525, _50900)
^  Unify: (273) [user] mfix_vars1(1525, _50900)
   Call: (274) [system] is_list(1525)
^  Redo: (273) [user] mfix_vars1(1525, _50900)
^  Unify: (273) [user] mfix_vars1(1525, _50900)
   Call: (274) [system] string(1525)
^  Redo: (273) [user] mfix_vars1(1525, _50900)
^  Unify: (273) [user] mfix_vars1(1525, _50900)
   Call: (274) [system] compound(1525)
^  Redo: (273) [user] mfix_vars1(1525, _50900)
^  Unify: (273) [user] mfix_vars1(1525, _50900)
^  Call: (274) [user] symbol(1525)
^  Unify: (274) [user] symbol(1525)
   Call: (275) [system] atom(1525)
   Fail: (275) [system] atom(1525)
^  Fail: (274) [user] symbol(1525)
^  Redo: (273) [user] mfix_vars1(1525, _50900)
   Call: (274) [system] 1525=_50900
   Exit: (274) [system] 1525=1525
^  Exit: (273) [user] mfix_vars1(1525, 1525)
   Call: (273) [apply] apply:maplist_([0], _50902, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_85226|_85228], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _85226)
^  Unify: (274) [user] mfix_vars1(0, _85226)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _85226)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_89872))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _85226)
^  Unify: (274) [user] mfix_vars1(0, _85226)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _85226)
^  Unify: (274) [user] mfix_vars1(0, _85226)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _85226)
^  Unify: (274) [user] mfix_vars1(0, _85226)
   Call: (275) [system] 0==[_99152, _99158]
^  Redo: (274) [user] mfix_vars1(0, _85226)
^  Unify: (274) [user] mfix_vars1(0, _85226)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _85226)
^  Unify: (274) [user] mfix_vars1(0, _85226)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _85226)
^  Unify: (274) [user] mfix_vars1(0, _85226)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _85226)
^  Unify: (274) [user] mfix_vars1(0, _85226)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _85226)
   Call: (275) [system] 0=_85226
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _85228, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1525, 0], [1525, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1525, 0], [";; Converted:", 1525, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1525, 0], [";; Converted:", 1525, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";; Converted:", 1525, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1525, 0), '$COMMENT', [";; Converted:", 1525, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1525, 0)\=@='$COMMENT'(";; Converted:", 1525, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1525, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1525, 0), _135400))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1525, 0), _135400))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1525, 0), _135400))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1525, 0), _135400))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1525, 0), _135400)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1525, 0), _135400)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1525, 0), _140986))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1525, 0), _140986))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1525, 0), _140986)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1525, 0), _140986)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1525, 0), _140986)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1525, 0)\=@='$COMMENT'(";; Converted:", 1525, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1525, 0), _135400)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1525, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1525, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1525, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1525, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1525, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1525, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1525, 0), _163306))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1525, 0), _163306))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1525, 0), _163306)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1525, 0), _163306)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1525, 0), _163306)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1525, 0)\=@='$COMMENT'(";; Converted:", 1525, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1525, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1525, 0)\=@='$COMMENT'(";; Converted:", 1525, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1525, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1525, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1525, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1525, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1525, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1525, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1525, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1525, 0), _192084, [], _192086)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1525, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1525, 0), _192084, [], _192086)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1525, 0), _192084, [], _192086)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1525, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1525, 0), _192084, [], _192086)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1525, 0), _192084, [], _192086)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1525, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1525, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1525, 0), _201400, _201402)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1525, 0), '$COMMENT', [";; Converted:", 1525, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1525, 0], _203286, [], _192086)
^  Unify: (258) [user] subst_vars([";; Converted:", 1525, 0], [";; Converted:", 1525, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1525, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1525, 0], _203286, [], _192086)
^  Unify: (258) [user] subst_vars([";; Converted:", 1525, 0], [_207022|_207024], [], _192086)
^  Call: (259) [user] subst_vars(";; Converted:", _207022, [], _207962)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _207022, [], _207962)
^  Unify: (259) [user] subst_vars(";; Converted:", _207022, [], _207962)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _207022, [], _207962)
^  Unify: (259) [user] subst_vars(";; Converted:", _207022, [], _207962)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _207022, [], _207962)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1525, 0], _207024, [], _192086)
^  Unify: (259) [user] subst_vars([1525, 0], [1525, 0], [], [])
   Call: (260) [system] var([1525, 0])
^  Redo: (259) [user] subst_vars([1525, 0], _207024, [], _192086)
^  Unify: (259) [user] subst_vars([1525, 0], [_222894|_222896], [], _192086)
^  Call: (260) [user] subst_vars(1525, _222894, [], _223834)
^  Unify: (260) [user] subst_vars(1525, 1525, [], [])
   Call: (261) [system] var(1525)
^  Redo: (260) [user] subst_vars(1525, _222894, [], _223834)
^  Unify: (260) [user] subst_vars(1525, _222894, [], _223834)
   Call: (261) [system] atom(1525)
^  Redo: (260) [user] subst_vars(1525, _222894, [], _223834)
^  Unify: (260) [user] subst_vars(1525, _222894, [], _223834)
   Call: (261) [system] compound(1525)
^  Redo: (260) [user] subst_vars(1525, _222894, [], _223834)
^  Unify: (260) [user] subst_vars(1525, 1525, [], [])
^  Exit: (260) [user] subst_vars(1525, 1525, [], [])
^  Call: (260) [user] subst_vars([0], _222896, [], _192086)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _222896, [], _192086)
^  Unify: (260) [user] subst_vars([0], [_238766|_238768], [], _192086)
^  Call: (261) [user] subst_vars(0, _238766, [], _239706)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _238766, [], _239706)
^  Unify: (261) [user] subst_vars(0, _238766, [], _239706)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _238766, [], _239706)
^  Unify: (261) [user] subst_vars(0, _238766, [], _239706)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _238766, [], _239706)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _238768, [], _192086)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _238768, [], _192086)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1525, 0], [1525, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1525, 0], [";; Converted:", 1525, 0], [], [])
   Call: (258) [system] compound_name_arguments(_192084, '$COMMENT', [";; Converted:", 1525, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1525, 0), '$COMMENT', [";; Converted:", 1525, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1525, 0), '$COMMENT'(";; Converted:", 1525, 0), [], [])
   Call: (257) [system] _262124=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1525, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1525, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1525, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1525, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1525, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1525, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1525, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1525, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1525, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1526, 0, 54866, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$stream_position'(54866, 1526, 0, 54900)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _314854))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _314854))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _314854)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _314854)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _314854)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _314854)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _320466))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _320466))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _320466))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _320466))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _320466)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _320466)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _326052))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _326052))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _326052)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _326052)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _326052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _326052)
   Call: (270) [system] var('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _326052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$VAR'(_333512))
   Call: (270) [system] atom('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _326052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _326052)
   Call: (270) [system] '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _326052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _326052)
   Call: (270) [system] '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _326052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _326052)
   Call: (270) [system] '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0)==[_342792, _342798]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _326052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _326052)
   Call: (270) [system] is_list('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _326052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _326052)
   Call: (270) [system] string('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _326052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _326052)
   Call: (270) [system] compound('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _352994, _352996)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT', [";; Define the grounded atom in MeTTa-compatible format.", 1526, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Define the grounded atom in MeTTa-compatible format.", 1526, 0], _356736)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Define the grounded atom in MeTTa-compatible format.", 1526, 0], _356736)
   Call: (271) [apply] apply:maplist_([";; Define the grounded atom in MeTTa-compatible format.", 1526, 0], _356736, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Define the grounded atom in MeTTa-compatible format.", 1526, 0], [_359554|_359556], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Define the grounded atom in MeTTa-compatible format.", _359554)
^  Unify: (272) [user] mfix_vars1(";; Define the grounded atom in MeTTa-compatible format.", _359554)
   Call: (273) [system] var(";; Define the grounded atom in MeTTa-compatible format.")
^  Redo: (272) [user] mfix_vars1(";; Define the grounded atom in MeTTa-compatible format.", _359554)
^  Unify: (272) [user] mfix_vars1(";; Define the grounded atom in MeTTa-compatible format.", '$VAR'(_364200))
   Call: (273) [system] atom(";; Define the grounded atom in MeTTa-compatible format.")
^  Redo: (272) [user] mfix_vars1(";; Define the grounded atom in MeTTa-compatible format.", _359554)
^  Unify: (272) [user] mfix_vars1(";; Define the grounded atom in MeTTa-compatible format.", _359554)
   Call: (273) [system] ";; Define the grounded atom in MeTTa-compatible format."==true
^  Redo: (272) [user] mfix_vars1(";; Define the grounded atom in MeTTa-compatible format.", _359554)
^  Unify: (272) [user] mfix_vars1(";; Define the grounded atom in MeTTa-compatible format.", _359554)
   Call: (273) [system] ";; Define the grounded atom in MeTTa-compatible format."==false
^  Redo: (272) [user] mfix_vars1(";; Define the grounded atom in MeTTa-compatible format.", _359554)
^  Unify: (272) [user] mfix_vars1(";; Define the grounded atom in MeTTa-compatible format.", _359554)
   Call: (273) [system] ";; Define the grounded atom in MeTTa-compatible format."==[_373480, _373486]
^  Redo: (272) [user] mfix_vars1(";; Define the grounded atom in MeTTa-compatible format.", _359554)
^  Unify: (272) [user] mfix_vars1(";; Define the grounded atom in MeTTa-compatible format.", _359554)
   Call: (273) [system] is_list(";; Define the grounded atom in MeTTa-compatible format.")
^  Redo: (272) [user] mfix_vars1(";; Define the grounded atom in MeTTa-compatible format.", _359554)
^  Unify: (272) [user] mfix_vars1(";; Define the grounded atom in MeTTa-compatible format.", _359554)
   Call: (273) [system] string(";; Define the grounded atom in MeTTa-compatible format.")
   Exit: (273) [system] string(";; Define the grounded atom in MeTTa-compatible format.")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Define the grounded atom in MeTTa-compatible format.", _359554)
^  Unify: (272) [user] mfix_vars1(";; Define the grounded atom in MeTTa-compatible format.", _359554)
   Call: (273) [system] compound(";; Define the grounded atom in MeTTa-compatible format.")
^  Redo: (272) [user] mfix_vars1(";; Define the grounded atom in MeTTa-compatible format.", _359554)
^  Unify: (272) [user] mfix_vars1(";; Define the grounded atom in MeTTa-compatible format.", _359554)
^  Call: (273) [user] symbol(";; Define the grounded atom in MeTTa-compatible format.")
^  Unify: (273) [user] symbol(";; Define the grounded atom in MeTTa-compatible format.")
   Call: (274) [system] atom(";; Define the grounded atom in MeTTa-compatible format.")
   Fail: (274) [system] atom(";; Define the grounded atom in MeTTa-compatible format.")
^  Fail: (273) [user] symbol(";; Define the grounded atom in MeTTa-compatible format.")
^  Redo: (272) [user] mfix_vars1(";; Define the grounded atom in MeTTa-compatible format.", _359554)
   Call: (273) [system] ";; Define the grounded atom in MeTTa-compatible format."=_359554
   Exit: (273) [system] ";; Define the grounded atom in MeTTa-compatible format."=";; Define the grounded atom in MeTTa-compatible format."
^  Exit: (272) [user] mfix_vars1(";; Define the grounded atom in MeTTa-compatible format.", ";; Define the grounded atom in MeTTa-compatible format.")
   Call: (272) [apply] apply:maplist_([1526, 0], _359556, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1526, 0], [_397552|_397554], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1526, _397552)
^  Unify: (273) [user] mfix_vars1(1526, _397552)
   Call: (274) [system] var(1526)
^  Redo: (273) [user] mfix_vars1(1526, _397552)
^  Unify: (273) [user] mfix_vars1(1526, '$VAR'(_402198))
   Call: (274) [system] atom(1526)
^  Redo: (273) [user] mfix_vars1(1526, _397552)
^  Unify: (273) [user] mfix_vars1(1526, _397552)
   Call: (274) [system] 1526==true
^  Redo: (273) [user] mfix_vars1(1526, _397552)
^  Unify: (273) [user] mfix_vars1(1526, _397552)
   Call: (274) [system] 1526==false
^  Redo: (273) [user] mfix_vars1(1526, _397552)
^  Unify: (273) [user] mfix_vars1(1526, _397552)
   Call: (274) [system] 1526==[_411478, _411484]
^  Redo: (273) [user] mfix_vars1(1526, _397552)
^  Unify: (273) [user] mfix_vars1(1526, _397552)
   Call: (274) [system] is_list(1526)
^  Redo: (273) [user] mfix_vars1(1526, _397552)
^  Unify: (273) [user] mfix_vars1(1526, _397552)
   Call: (274) [system] string(1526)
^  Redo: (273) [user] mfix_vars1(1526, _397552)
^  Unify: (273) [user] mfix_vars1(1526, _397552)
   Call: (274) [system] compound(1526)
^  Redo: (273) [user] mfix_vars1(1526, _397552)
^  Unify: (273) [user] mfix_vars1(1526, _397552)
^  Call: (274) [user] symbol(1526)
^  Unify: (274) [user] symbol(1526)
   Call: (275) [system] atom(1526)
   Fail: (275) [system] atom(1526)
^  Fail: (274) [user] symbol(1526)
^  Redo: (273) [user] mfix_vars1(1526, _397552)
   Call: (274) [system] 1526=_397552
   Exit: (274) [system] 1526=1526
^  Exit: (273) [user] mfix_vars1(1526, 1526)
   Call: (273) [apply] apply:maplist_([0], _397554, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_431878|_431880], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _431878)
^  Unify: (274) [user] mfix_vars1(0, _431878)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _431878)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_436524))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _431878)
^  Unify: (274) [user] mfix_vars1(0, _431878)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _431878)
^  Unify: (274) [user] mfix_vars1(0, _431878)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _431878)
^  Unify: (274) [user] mfix_vars1(0, _431878)
   Call: (275) [system] 0==[_445804, _445810]
^  Redo: (274) [user] mfix_vars1(0, _431878)
^  Unify: (274) [user] mfix_vars1(0, _431878)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _431878)
^  Unify: (274) [user] mfix_vars1(0, _431878)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _431878)
^  Unify: (274) [user] mfix_vars1(0, _431878)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _431878)
^  Unify: (274) [user] mfix_vars1(0, _431878)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _431878)
   Call: (275) [system] 0=_431878
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _431880, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1526, 0], [1526, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Define the grounded atom in MeTTa-compatible format.", 1526, 0], [";; Define the grounded atom in MeTTa-compatible format.", 1526, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Define the grounded atom in MeTTa-compatible format.", 1526, 0], [";; Define the grounded atom in MeTTa-compatible format.", 1526, 0])
   Call: (270) [system] compound_name_arguments(_326052, '$COMMENT', [";; Define the grounded atom in MeTTa-compatible format.", 1526, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT', [";; Define the grounded atom in MeTTa-compatible format.", 1526, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0)))
   Call: (267) [system] '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0)\=@='$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _320466)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _482052))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _482052))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _482052))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _482052))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _482052)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _482052)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _487638))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _487638))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _487638)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _487638)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _487638)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0)))
   Call: (267) [system] '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0)\=@='$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _482052)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _314854))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _314854))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _314854))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _314854))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _314854)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _314854)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _509958))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _509958))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _509958)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _509958)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _509958)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0)))
   Call: (267) [system] '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0)\=@='$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _314854)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0)))
   Call: (261) [system] '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0)\=@='$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _20704, [], _20706)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _20704, [], _20706)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _20704, [], _20706)
   Call: (258) [system] atom('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _20704, [], _20706)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _20704, [], _20706)
   Call: (258) [system] compound('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), _30020, _30022)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT', [";; Define the grounded atom in MeTTa-compatible format.", 1526, 0])
^  Call: (258) [user] subst_vars([";; Define the grounded atom in MeTTa-compatible format.", 1526, 0], _31906, [], _20706)
^  Unify: (258) [user] subst_vars([";; Define the grounded atom in MeTTa-compatible format.", 1526, 0], [";; Define the grounded atom in MeTTa-compatible format.", 1526, 0], [], [])
   Call: (259) [system] var([";; Define the grounded atom in MeTTa-compatible format.", 1526, 0])
^  Redo: (258) [user] subst_vars([";; Define the grounded atom in MeTTa-compatible format.", 1526, 0], _31906, [], _20706)
^  Unify: (258) [user] subst_vars([";; Define the grounded atom in MeTTa-compatible format.", 1526, 0], [_35642|_35644], [], _20706)
^  Call: (259) [user] subst_vars(";; Define the grounded atom in MeTTa-compatible format.", _35642, [], _36582)
^  Unify: (259) [user] subst_vars(";; Define the grounded atom in MeTTa-compatible format.", ";; Define the grounded atom in MeTTa-compatible format.", [], [])
   Call: (260) [system] var(";; Define the grounded atom in MeTTa-compatible format.")
^  Redo: (259) [user] subst_vars(";; Define the grounded atom in MeTTa-compatible format.", _35642, [], _36582)
^  Unify: (259) [user] subst_vars(";; Define the grounded atom in MeTTa-compatible format.", _35642, [], _36582)
   Call: (260) [system] atom(";; Define the grounded atom in MeTTa-compatible format.")
^  Redo: (259) [user] subst_vars(";; Define the grounded atom in MeTTa-compatible format.", _35642, [], _36582)
^  Unify: (259) [user] subst_vars(";; Define the grounded atom in MeTTa-compatible format.", _35642, [], _36582)
   Call: (260) [system] compound(";; Define the grounded atom in MeTTa-compatible format.")
^  Redo: (259) [user] subst_vars(";; Define the grounded atom in MeTTa-compatible format.", _35642, [], _36582)
^  Unify: (259) [user] subst_vars(";; Define the grounded atom in MeTTa-compatible format.", ";; Define the grounded atom in MeTTa-compatible format.", [], [])
^  Exit: (259) [user] subst_vars(";; Define the grounded atom in MeTTa-compatible format.", ";; Define the grounded atom in MeTTa-compatible format.", [], [])
^  Call: (259) [user] subst_vars([1526, 0], _35644, [], _20706)
^  Unify: (259) [user] subst_vars([1526, 0], [1526, 0], [], [])
   Call: (260) [system] var([1526, 0])
^  Redo: (259) [user] subst_vars([1526, 0], _35644, [], _20706)
^  Unify: (259) [user] subst_vars([1526, 0], [_51514|_51516], [], _20706)
^  Call: (260) [user] subst_vars(1526, _51514, [], _52454)
^  Unify: (260) [user] subst_vars(1526, 1526, [], [])
   Call: (261) [system] var(1526)
^  Redo: (260) [user] subst_vars(1526, _51514, [], _52454)
^  Unify: (260) [user] subst_vars(1526, _51514, [], _52454)
   Call: (261) [system] atom(1526)
^  Redo: (260) [user] subst_vars(1526, _51514, [], _52454)
^  Unify: (260) [user] subst_vars(1526, _51514, [], _52454)
   Call: (261) [system] compound(1526)
^  Redo: (260) [user] subst_vars(1526, _51514, [], _52454)
^  Unify: (260) [user] subst_vars(1526, 1526, [], [])
^  Exit: (260) [user] subst_vars(1526, 1526, [], [])
^  Call: (260) [user] subst_vars([0], _51516, [], _20706)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _51516, [], _20706)
^  Unify: (260) [user] subst_vars([0], [_67386|_67388], [], _20706)
^  Call: (261) [user] subst_vars(0, _67386, [], _68326)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _67386, [], _68326)
^  Unify: (261) [user] subst_vars(0, _67386, [], _68326)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _67386, [], _68326)
^  Unify: (261) [user] subst_vars(0, _67386, [], _68326)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _67386, [], _68326)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _67388, [], _20706)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _67388, [], _20706)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1526, 0], [1526, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Define the grounded atom in MeTTa-compatible format.", 1526, 0], [";; Define the grounded atom in MeTTa-compatible format.", 1526, 0], [], [])
   Call: (258) [system] compound_name_arguments(_20704, '$COMMENT', [";; Define the grounded atom in MeTTa-compatible format.", 1526, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT', [";; Define the grounded atom in MeTTa-compatible format.", 1526, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), [], [])
   Call: (257) [system] _90744=metta_file_buffer(+, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Define the grounded atom in MeTTa-compatible format.", 1526, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1527, 0, 54922, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$stream_position'(54922, 1527, 0, 54956)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _143490))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _143490))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _143490)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _143490)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _143490)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _143490)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _149102))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _149102))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _149102))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _149102))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _149102)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _149102)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _154688))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _154688))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _154688)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _154688)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _154688)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _154688)
   Call: (270) [system] var('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _154688)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$VAR'(_162148))
   Call: (270) [system] atom('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _154688)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _154688)
   Call: (270) [system] '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _154688)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _154688)
   Call: (270) [system] '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _154688)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _154688)
   Call: (270) [system] '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0)==[_171428, _171434]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _154688)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _154688)
   Call: (270) [system] is_list('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _154688)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _154688)
   Call: (270) [system] string('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _154688)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _154688)
   Call: (270) [system] compound('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
   Exit: (270) [system] compound('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _181630, _181632)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT', [";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0], _185372)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0], _185372)
   Call: (271) [apply] apply:maplist_([";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0], _185372, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0], [_188190|_188192], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _188190)
^  Unify: (272) [user] mfix_vars1(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _188190)
   Call: (273) [system] var(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.")
^  Redo: (272) [user] mfix_vars1(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _188190)
^  Unify: (272) [user] mfix_vars1(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", '$VAR'(_192836))
   Call: (273) [system] atom(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.")
^  Redo: (272) [user] mfix_vars1(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _188190)
^  Unify: (272) [user] mfix_vars1(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _188190)
   Call: (273) [system] ";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed."==true
^  Redo: (272) [user] mfix_vars1(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _188190)
^  Unify: (272) [user] mfix_vars1(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _188190)
   Call: (273) [system] ";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed."==false
^  Redo: (272) [user] mfix_vars1(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _188190)
^  Unify: (272) [user] mfix_vars1(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _188190)
   Call: (273) [system] ";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed."==[_202116, _202122]
^  Redo: (272) [user] mfix_vars1(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _188190)
^  Unify: (272) [user] mfix_vars1(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _188190)
   Call: (273) [system] is_list(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.")
^  Redo: (272) [user] mfix_vars1(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _188190)
^  Unify: (272) [user] mfix_vars1(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _188190)
   Call: (273) [system] string(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.")
   Exit: (273) [system] string(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _188190)
^  Unify: (272) [user] mfix_vars1(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _188190)
   Call: (273) [system] compound(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.")
^  Redo: (272) [user] mfix_vars1(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _188190)
^  Unify: (272) [user] mfix_vars1(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _188190)
^  Call: (273) [user] symbol(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.")
^  Unify: (273) [user] symbol(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.")
   Call: (274) [system] atom(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.")
   Fail: (274) [system] atom(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.")
^  Fail: (273) [user] symbol(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.")
^  Redo: (272) [user] mfix_vars1(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _188190)
   Call: (273) [system] ";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed."=_188190
   Exit: (273) [system] ";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed."=";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed."
^  Exit: (272) [user] mfix_vars1(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", ";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.")
   Call: (272) [apply] apply:maplist_([1527, 0], _188192, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1527, 0], [_226188|_226190], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1527, _226188)
^  Unify: (273) [user] mfix_vars1(1527, _226188)
   Call: (274) [system] var(1527)
^  Redo: (273) [user] mfix_vars1(1527, _226188)
^  Unify: (273) [user] mfix_vars1(1527, '$VAR'(_230834))
   Call: (274) [system] atom(1527)
^  Redo: (273) [user] mfix_vars1(1527, _226188)
^  Unify: (273) [user] mfix_vars1(1527, _226188)
   Call: (274) [system] 1527==true
^  Redo: (273) [user] mfix_vars1(1527, _226188)
^  Unify: (273) [user] mfix_vars1(1527, _226188)
   Call: (274) [system] 1527==false
^  Redo: (273) [user] mfix_vars1(1527, _226188)
^  Unify: (273) [user] mfix_vars1(1527, _226188)
   Call: (274) [system] 1527==[_240114, _240120]
^  Redo: (273) [user] mfix_vars1(1527, _226188)
^  Unify: (273) [user] mfix_vars1(1527, _226188)
   Call: (274) [system] is_list(1527)
^  Redo: (273) [user] mfix_vars1(1527, _226188)
^  Unify: (273) [user] mfix_vars1(1527, _226188)
   Call: (274) [system] string(1527)
^  Redo: (273) [user] mfix_vars1(1527, _226188)
^  Unify: (273) [user] mfix_vars1(1527, _226188)
   Call: (274) [system] compound(1527)
^  Redo: (273) [user] mfix_vars1(1527, _226188)
^  Unify: (273) [user] mfix_vars1(1527, _226188)
^  Call: (274) [user] symbol(1527)
^  Unify: (274) [user] symbol(1527)
   Call: (275) [system] atom(1527)
   Fail: (275) [system] atom(1527)
^  Fail: (274) [user] symbol(1527)
^  Redo: (273) [user] mfix_vars1(1527, _226188)
   Call: (274) [system] 1527=_226188
   Exit: (274) [system] 1527=1527
^  Exit: (273) [user] mfix_vars1(1527, 1527)
   Call: (273) [apply] apply:maplist_([0], _226190, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_260514|_260516], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _260514)
^  Unify: (274) [user] mfix_vars1(0, _260514)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _260514)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_265160))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _260514)
^  Unify: (274) [user] mfix_vars1(0, _260514)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _260514)
^  Unify: (274) [user] mfix_vars1(0, _260514)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _260514)
^  Unify: (274) [user] mfix_vars1(0, _260514)
   Call: (275) [system] 0==[_274440, _274446]
^  Redo: (274) [user] mfix_vars1(0, _260514)
^  Unify: (274) [user] mfix_vars1(0, _260514)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _260514)
^  Unify: (274) [user] mfix_vars1(0, _260514)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _260514)
^  Unify: (274) [user] mfix_vars1(0, _260514)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _260514)
^  Unify: (274) [user] mfix_vars1(0, _260514)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _260514)
   Call: (275) [system] 0=_260514
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _260516, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1527, 0], [1527, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0], [";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0], [";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0])
   Call: (270) [system] compound_name_arguments(_154688, '$COMMENT', [";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT', [";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0)))
   Call: (267) [system] '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0)\=@='$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _149102)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _310688))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _310688))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _310688))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _310688))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _310688)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _310688)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _316274))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _316274))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _316274)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _316274)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _316274)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0)))
   Call: (267) [system] '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0)\=@='$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _310688)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _143490))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _143490))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _143490))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _143490))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _143490)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _143490)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _338594))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _338594))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _338594)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _338594)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _338594)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0)))
   Call: (267) [system] '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0)\=@='$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _143490)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0)))
   Call: (261) [system] '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0)\=@='$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _367372, [], _367374)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _367372, [], _367374)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _367372, [], _367374)
   Call: (258) [system] atom('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _367372, [], _367374)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _367372, [], _367374)
   Call: (258) [system] compound('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
   Exit: (258) [system] compound('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), _376688, _376690)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT', [";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0])
^  Call: (258) [user] subst_vars([";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0], _378574, [], _367374)
^  Unify: (258) [user] subst_vars([";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0], [";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0], [], [])
   Call: (259) [system] var([";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0])
^  Redo: (258) [user] subst_vars([";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0], _378574, [], _367374)
^  Unify: (258) [user] subst_vars([";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0], [_382310|_382312], [], _367374)
^  Call: (259) [user] subst_vars(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _382310, [], _383250)
^  Unify: (259) [user] subst_vars(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", ";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", [], [])
   Call: (260) [system] var(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.")
^  Redo: (259) [user] subst_vars(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _382310, [], _383250)
^  Unify: (259) [user] subst_vars(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _382310, [], _383250)
   Call: (260) [system] atom(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.")
^  Redo: (259) [user] subst_vars(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _382310, [], _383250)
^  Unify: (259) [user] subst_vars(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _382310, [], _383250)
   Call: (260) [system] compound(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.")
^  Redo: (259) [user] subst_vars(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", _382310, [], _383250)
^  Unify: (259) [user] subst_vars(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", ";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", [], [])
^  Exit: (259) [user] subst_vars(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", ";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", [], [])
^  Call: (259) [user] subst_vars([1527, 0], _382312, [], _367374)
^  Unify: (259) [user] subst_vars([1527, 0], [1527, 0], [], [])
   Call: (260) [system] var([1527, 0])
^  Redo: (259) [user] subst_vars([1527, 0], _382312, [], _367374)
^  Unify: (259) [user] subst_vars([1527, 0], [_398182|_398184], [], _367374)
^  Call: (260) [user] subst_vars(1527, _398182, [], _399122)
^  Unify: (260) [user] subst_vars(1527, 1527, [], [])
   Call: (261) [system] var(1527)
^  Redo: (260) [user] subst_vars(1527, _398182, [], _399122)
^  Unify: (260) [user] subst_vars(1527, _398182, [], _399122)
   Call: (261) [system] atom(1527)
^  Redo: (260) [user] subst_vars(1527, _398182, [], _399122)
^  Unify: (260) [user] subst_vars(1527, _398182, [], _399122)
   Call: (261) [system] compound(1527)
^  Redo: (260) [user] subst_vars(1527, _398182, [], _399122)
^  Unify: (260) [user] subst_vars(1527, 1527, [], [])
^  Exit: (260) [user] subst_vars(1527, 1527, [], [])
^  Call: (260) [user] subst_vars([0], _398184, [], _367374)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _398184, [], _367374)
^  Unify: (260) [user] subst_vars([0], [_414054|_414056], [], _367374)
^  Call: (261) [user] subst_vars(0, _414054, [], _414994)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _414054, [], _414994)
^  Unify: (261) [user] subst_vars(0, _414054, [], _414994)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _414054, [], _414994)
^  Unify: (261) [user] subst_vars(0, _414054, [], _414994)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _414054, [], _414994)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _414056, [], _367374)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _414056, [], _367374)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1527, 0], [1527, 0], [], [])
^  Exit: (258) [user] subst_vars([";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0], [";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0], [], [])
   Call: (258) [system] compound_name_arguments(_367372, '$COMMENT', [";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT', [";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), [], [])
   Call: (257) [system] _437412=metta_file_buffer(+, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; This part would typically be defined in the system as an extension or plugin and referenced in the program as needed.", 1527, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1531, 0, 55095, '$COMMENT'(";; Original:", 1531, 0), '$stream_position'(55095, 1531, 0, 55129)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1531, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1531, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1531, 0), _490130))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1531, 0), _490130))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1531, 0), _490130)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1531, 0), _490130)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1531, 0), _490130)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1531, 0), _490130)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1531, 0), _495742))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1531, 0), _495742))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1531, 0), _495742))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1531, 0), _495742))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1531, 0), _495742)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1531, 0), _495742)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1531, 0), _501328))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1531, 0), _501328))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1531, 0), _501328)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1531, 0), _501328)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1531, 0), _501328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1531, 0), _501328)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1531, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1531, 0), _501328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1531, 0), '$VAR'(_508788))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1531, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1531, 0), _501328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1531, 0), _501328)
   Call: (270) [system] '$COMMENT'(";; Original:", 1531, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1531, 0), _501328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1531, 0), _501328)
   Call: (270) [system] '$COMMENT'(";; Original:", 1531, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1531, 0), _501328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1531, 0), _501328)
   Call: (270) [system] '$COMMENT'(";; Original:", 1531, 0)==[_518068, _518074]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1531, 0), _501328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1531, 0), _501328)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1531, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1531, 0), _501328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1531, 0), _501328)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1531, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1531, 0), _5978)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1531, 0), _5978)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1531, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1531, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1531, 0), _10328, _10330)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1531, 0), '$COMMENT', [";; Original:", 1531, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1531, 0], _14070)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1531, 0], _14070)
   Call: (271) [apply] apply:maplist_([";; Original:", 1531, 0], _14070, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1531, 0], [_16888|_16890], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _16888)
^  Unify: (272) [user] mfix_vars1(";; Original:", _16888)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _16888)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_21534))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _16888)
^  Unify: (272) [user] mfix_vars1(";; Original:", _16888)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _16888)
^  Unify: (272) [user] mfix_vars1(";; Original:", _16888)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _16888)
^  Unify: (272) [user] mfix_vars1(";; Original:", _16888)
   Call: (273) [system] ";; Original:"==[_30814, _30820]
^  Redo: (272) [user] mfix_vars1(";; Original:", _16888)
^  Unify: (272) [user] mfix_vars1(";; Original:", _16888)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _16888)
^  Unify: (272) [user] mfix_vars1(";; Original:", _16888)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _16888)
^  Unify: (272) [user] mfix_vars1(";; Original:", _16888)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _16888)
^  Unify: (272) [user] mfix_vars1(";; Original:", _16888)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _16888)
   Call: (273) [system] ";; Original:"=_16888
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1531, 0], _16890, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1531, 0], [_54886|_54888], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1531, _54886)
^  Unify: (273) [user] mfix_vars1(1531, _54886)
   Call: (274) [system] var(1531)
^  Redo: (273) [user] mfix_vars1(1531, _54886)
^  Unify: (273) [user] mfix_vars1(1531, '$VAR'(_59532))
   Call: (274) [system] atom(1531)
^  Redo: (273) [user] mfix_vars1(1531, _54886)
^  Unify: (273) [user] mfix_vars1(1531, _54886)
   Call: (274) [system] 1531==true
^  Redo: (273) [user] mfix_vars1(1531, _54886)
^  Unify: (273) [user] mfix_vars1(1531, _54886)
   Call: (274) [system] 1531==false
^  Redo: (273) [user] mfix_vars1(1531, _54886)
^  Unify: (273) [user] mfix_vars1(1531, _54886)
   Call: (274) [system] 1531==[_68812, _68818]
^  Redo: (273) [user] mfix_vars1(1531, _54886)
^  Unify: (273) [user] mfix_vars1(1531, _54886)
   Call: (274) [system] is_list(1531)
^  Redo: (273) [user] mfix_vars1(1531, _54886)
^  Unify: (273) [user] mfix_vars1(1531, _54886)
   Call: (274) [system] string(1531)
^  Redo: (273) [user] mfix_vars1(1531, _54886)
^  Unify: (273) [user] mfix_vars1(1531, _54886)
   Call: (274) [system] compound(1531)
^  Redo: (273) [user] mfix_vars1(1531, _54886)
^  Unify: (273) [user] mfix_vars1(1531, _54886)
^  Call: (274) [user] symbol(1531)
^  Unify: (274) [user] symbol(1531)
   Call: (275) [system] atom(1531)
   Fail: (275) [system] atom(1531)
^  Fail: (274) [user] symbol(1531)
^  Redo: (273) [user] mfix_vars1(1531, _54886)
   Call: (274) [system] 1531=_54886
   Exit: (274) [system] 1531=1531
^  Exit: (273) [user] mfix_vars1(1531, 1531)
   Call: (273) [apply] apply:maplist_([0], _54888, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_89212|_89214], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _89212)
^  Unify: (274) [user] mfix_vars1(0, _89212)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _89212)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_93858))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _89212)
^  Unify: (274) [user] mfix_vars1(0, _89212)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _89212)
^  Unify: (274) [user] mfix_vars1(0, _89212)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _89212)
^  Unify: (274) [user] mfix_vars1(0, _89212)
   Call: (275) [system] 0==[_103138, _103144]
^  Redo: (274) [user] mfix_vars1(0, _89212)
^  Unify: (274) [user] mfix_vars1(0, _89212)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _89212)
^  Unify: (274) [user] mfix_vars1(0, _89212)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _89212)
^  Unify: (274) [user] mfix_vars1(0, _89212)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _89212)
^  Unify: (274) [user] mfix_vars1(0, _89212)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _89212)
   Call: (275) [system] 0=_89212
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _89214, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1531, 0], [1531, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1531, 0], [";; Original:", 1531, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1531, 0], [";; Original:", 1531, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";; Original:", 1531, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1531, 0), '$COMMENT', [";; Original:", 1531, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1531, 0)\=@='$COMMENT'(";; Original:", 1531, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1531, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1531, 0), _139386))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1531, 0), _139386))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1531, 0), _139386))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1531, 0), _139386))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1531, 0), _139386)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1531, 0), _139386)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1531, 0), _144972))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1531, 0), _144972))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1531, 0), _144972)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1531, 0), _144972)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1531, 0), _144972)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1531, 0)\=@='$COMMENT'(";; Original:", 1531, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1531, 0), _139386)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1531, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1531, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1531, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1531, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1531, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1531, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1531, 0), _167292))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1531, 0), _167292))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1531, 0), _167292)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1531, 0), _167292)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1531, 0), _167292)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1531, 0)\=@='$COMMENT'(";; Original:", 1531, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1531, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1531, 0)\=@='$COMMENT'(";; Original:", 1531, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1531, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1531, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1531, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1531, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1531, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1531, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1531, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1531, 0), _196070, [], _196072)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1531, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1531, 0), _196070, [], _196072)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1531, 0), _196070, [], _196072)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1531, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1531, 0), _196070, [], _196072)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1531, 0), _196070, [], _196072)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1531, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1531, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1531, 0), _205386, _205388)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1531, 0), '$COMMENT', [";; Original:", 1531, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1531, 0], _207272, [], _196072)
^  Unify: (258) [user] subst_vars([";; Original:", 1531, 0], [";; Original:", 1531, 0], [], [])
   Call: (259) [system] var([";; Original:", 1531, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1531, 0], _207272, [], _196072)
^  Unify: (258) [user] subst_vars([";; Original:", 1531, 0], [_211008|_211010], [], _196072)
^  Call: (259) [user] subst_vars(";; Original:", _211008, [], _211948)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _211008, [], _211948)
^  Unify: (259) [user] subst_vars(";; Original:", _211008, [], _211948)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _211008, [], _211948)
^  Unify: (259) [user] subst_vars(";; Original:", _211008, [], _211948)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _211008, [], _211948)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1531, 0], _211010, [], _196072)
^  Unify: (259) [user] subst_vars([1531, 0], [1531, 0], [], [])
   Call: (260) [system] var([1531, 0])
^  Redo: (259) [user] subst_vars([1531, 0], _211010, [], _196072)
^  Unify: (259) [user] subst_vars([1531, 0], [_226880|_226882], [], _196072)
^  Call: (260) [user] subst_vars(1531, _226880, [], _227820)
^  Unify: (260) [user] subst_vars(1531, 1531, [], [])
   Call: (261) [system] var(1531)
^  Redo: (260) [user] subst_vars(1531, _226880, [], _227820)
^  Unify: (260) [user] subst_vars(1531, _226880, [], _227820)
   Call: (261) [system] atom(1531)
^  Redo: (260) [user] subst_vars(1531, _226880, [], _227820)
^  Unify: (260) [user] subst_vars(1531, _226880, [], _227820)
   Call: (261) [system] compound(1531)
^  Redo: (260) [user] subst_vars(1531, _226880, [], _227820)
^  Unify: (260) [user] subst_vars(1531, 1531, [], [])
^  Exit: (260) [user] subst_vars(1531, 1531, [], [])
^  Call: (260) [user] subst_vars([0], _226882, [], _196072)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _226882, [], _196072)
^  Unify: (260) [user] subst_vars([0], [_242752|_242754], [], _196072)
^  Call: (261) [user] subst_vars(0, _242752, [], _243692)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _242752, [], _243692)
^  Unify: (261) [user] subst_vars(0, _242752, [], _243692)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _242752, [], _243692)
^  Unify: (261) [user] subst_vars(0, _242752, [], _243692)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _242752, [], _243692)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _242754, [], _196072)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _242754, [], _196072)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1531, 0], [1531, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1531, 0], [";; Original:", 1531, 0], [], [])
   Call: (258) [system] compound_name_arguments(_196070, '$COMMENT', [";; Original:", 1531, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1531, 0), '$COMMENT', [";; Original:", 1531, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1531, 0), '$COMMENT'(";; Original:", 1531, 0), [], [])
   Call: (257) [system] _266110=metta_file_buffer(+, '$COMMENT'(";; Original:", 1531, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1531, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1531, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1531, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1531, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1531, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1531, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1531, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1531, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1532, 0, 55108, '$COMMENT'(";; #[test]", 1532, 0), '$stream_position'(55108, 1532, 0, 55142)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1532, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1532, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; #[test]", 1532, 0), _318828))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 1532, 0), _318828))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; #[test]", 1532, 0), _318828)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 1532, 0), _318828)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1532, 0), _318828)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1532, 0), _318828)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; #[test]", 1532, 0), _324440))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1532, 0), _324440))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1532, 0), _324440))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1532, 0), _324440))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1532, 0), _324440)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1532, 0), _324440)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; #[test]", 1532, 0), _330026))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 1532, 0), _330026))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; #[test]", 1532, 0), _330026)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 1532, 0), _330026)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1532, 0), _330026)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1532, 0), _330026)
   Call: (270) [system] var('$COMMENT'(";; #[test]", 1532, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1532, 0), _330026)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1532, 0), '$VAR'(_337486))
   Call: (270) [system] atom('$COMMENT'(";; #[test]", 1532, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1532, 0), _330026)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1532, 0), _330026)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1532, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1532, 0), _330026)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1532, 0), _330026)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1532, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1532, 0), _330026)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1532, 0), _330026)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1532, 0)==[_346766, _346772]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1532, 0), _330026)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1532, 0), _330026)
   Call: (270) [system] is_list('$COMMENT'(";; #[test]", 1532, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1532, 0), _330026)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1532, 0), _330026)
   Call: (270) [system] string('$COMMENT'(";; #[test]", 1532, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1532, 0), _330026)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1532, 0), _330026)
   Call: (270) [system] compound('$COMMENT'(";; #[test]", 1532, 0))
   Exit: (270) [system] compound('$COMMENT'(";; #[test]", 1532, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1532, 0), _356968, _356970)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1532, 0), '$COMMENT', [";; #[test]", 1532, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; #[test]", 1532, 0], _360710)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 1532, 0], _360710)
   Call: (271) [apply] apply:maplist_([";; #[test]", 1532, 0], _360710, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; #[test]", 1532, 0], [_363528|_363530], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; #[test]", _363528)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _363528)
   Call: (273) [system] var(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _363528)
^  Unify: (272) [user] mfix_vars1(";; #[test]", '$VAR'(_368174))
   Call: (273) [system] atom(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _363528)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _363528)
   Call: (273) [system] ";; #[test]"==true
^  Redo: (272) [user] mfix_vars1(";; #[test]", _363528)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _363528)
   Call: (273) [system] ";; #[test]"==false
^  Redo: (272) [user] mfix_vars1(";; #[test]", _363528)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _363528)
   Call: (273) [system] ";; #[test]"==[_377454, _377460]
^  Redo: (272) [user] mfix_vars1(";; #[test]", _363528)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _363528)
   Call: (273) [system] is_list(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _363528)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _363528)
   Call: (273) [system] string(";; #[test]")
   Exit: (273) [system] string(";; #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; #[test]", _363528)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _363528)
   Call: (273) [system] compound(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _363528)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _363528)
^  Call: (273) [user] symbol(";; #[test]")
^  Unify: (273) [user] symbol(";; #[test]")
   Call: (274) [system] atom(";; #[test]")
   Fail: (274) [system] atom(";; #[test]")
^  Fail: (273) [user] symbol(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _363528)
   Call: (273) [system] ";; #[test]"=_363528
   Exit: (273) [system] ";; #[test]"=";; #[test]"
^  Exit: (272) [user] mfix_vars1(";; #[test]", ";; #[test]")
   Call: (272) [apply] apply:maplist_([1532, 0], _363530, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1532, 0], [_401526|_401528], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1532, _401526)
^  Unify: (273) [user] mfix_vars1(1532, _401526)
   Call: (274) [system] var(1532)
^  Redo: (273) [user] mfix_vars1(1532, _401526)
^  Unify: (273) [user] mfix_vars1(1532, '$VAR'(_406172))
   Call: (274) [system] atom(1532)
^  Redo: (273) [user] mfix_vars1(1532, _401526)
^  Unify: (273) [user] mfix_vars1(1532, _401526)
   Call: (274) [system] 1532==true
^  Redo: (273) [user] mfix_vars1(1532, _401526)
^  Unify: (273) [user] mfix_vars1(1532, _401526)
   Call: (274) [system] 1532==false
^  Redo: (273) [user] mfix_vars1(1532, _401526)
^  Unify: (273) [user] mfix_vars1(1532, _401526)
   Call: (274) [system] 1532==[_415452, _415458]
^  Redo: (273) [user] mfix_vars1(1532, _401526)
^  Unify: (273) [user] mfix_vars1(1532, _401526)
   Call: (274) [system] is_list(1532)
^  Redo: (273) [user] mfix_vars1(1532, _401526)
^  Unify: (273) [user] mfix_vars1(1532, _401526)
   Call: (274) [system] string(1532)
^  Redo: (273) [user] mfix_vars1(1532, _401526)
^  Unify: (273) [user] mfix_vars1(1532, _401526)
   Call: (274) [system] compound(1532)
^  Redo: (273) [user] mfix_vars1(1532, _401526)
^  Unify: (273) [user] mfix_vars1(1532, _401526)
^  Call: (274) [user] symbol(1532)
^  Unify: (274) [user] symbol(1532)
   Call: (275) [system] atom(1532)
   Fail: (275) [system] atom(1532)
^  Fail: (274) [user] symbol(1532)
^  Redo: (273) [user] mfix_vars1(1532, _401526)
   Call: (274) [system] 1532=_401526
   Exit: (274) [system] 1532=1532
^  Exit: (273) [user] mfix_vars1(1532, 1532)
   Call: (273) [apply] apply:maplist_([0], _401528, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_435852|_435854], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _435852)
^  Unify: (274) [user] mfix_vars1(0, _435852)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _435852)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_440498))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _435852)
^  Unify: (274) [user] mfix_vars1(0, _435852)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _435852)
^  Unify: (274) [user] mfix_vars1(0, _435852)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _435852)
^  Unify: (274) [user] mfix_vars1(0, _435852)
   Call: (275) [system] 0==[_449778, _449784]
^  Redo: (274) [user] mfix_vars1(0, _435852)
^  Unify: (274) [user] mfix_vars1(0, _435852)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _435852)
^  Unify: (274) [user] mfix_vars1(0, _435852)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _435852)
^  Unify: (274) [user] mfix_vars1(0, _435852)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _435852)
^  Unify: (274) [user] mfix_vars1(0, _435852)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _435852)
   Call: (275) [system] 0=_435852
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _435854, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1532, 0], [1532, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; #[test]", 1532, 0], [";; #[test]", 1532, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 1532, 0], [";; #[test]", 1532, 0])
   Call: (270) [system] compound_name_arguments(_330026, '$COMMENT', [";; #[test]", 1532, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1532, 0), '$COMMENT', [";; #[test]", 1532, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1532, 0)\=@='$COMMENT'(";; #[test]", 1532, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1532, 0), _324440)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; #[test]", 1532, 0), _486026))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1532, 0), _486026))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1532, 0), _486026))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1532, 0), _486026))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1532, 0), _486026)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1532, 0), _486026)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; #[test]", 1532, 0), _491612))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 1532, 0), _491612))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; #[test]", 1532, 0), _491612)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 1532, 0), _491612)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1532, 0), _491612)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1532, 0)\=@='$COMMENT'(";; #[test]", 1532, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1532, 0), _486026)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; #[test]", 1532, 0), _318828))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1532, 0), _318828))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1532, 0), _318828))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1532, 0), _318828))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1532, 0), _318828)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1532, 0), _318828)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; #[test]", 1532, 0), _513932))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 1532, 0), _513932))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; #[test]", 1532, 0), _513932)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 1532, 0), _513932)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1532, 0), _513932)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1532, 0)\=@='$COMMENT'(";; #[test]", 1532, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1532, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0)))
   Call: (261) [system] '$COMMENT'(";; #[test]", 1532, 0)\=@='$COMMENT'(";; #[test]", 1532, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1532, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1532, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1532, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1532, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1532, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1532, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1532, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1532, 0), _24522, [], _24524)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; #[test]", 1532, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1532, 0), _24522, [], _24524)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1532, 0), _24522, [], _24524)
   Call: (258) [system] atom('$COMMENT'(";; #[test]", 1532, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1532, 0), _24522, [], _24524)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1532, 0), _24522, [], _24524)
   Call: (258) [system] compound('$COMMENT'(";; #[test]", 1532, 0))
   Exit: (258) [system] compound('$COMMENT'(";; #[test]", 1532, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1532, 0), _33838, _33840)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1532, 0), '$COMMENT', [";; #[test]", 1532, 0])
^  Call: (258) [user] subst_vars([";; #[test]", 1532, 0], _35724, [], _24524)
^  Unify: (258) [user] subst_vars([";; #[test]", 1532, 0], [";; #[test]", 1532, 0], [], [])
   Call: (259) [system] var([";; #[test]", 1532, 0])
^  Redo: (258) [user] subst_vars([";; #[test]", 1532, 0], _35724, [], _24524)
^  Unify: (258) [user] subst_vars([";; #[test]", 1532, 0], [_39460|_39462], [], _24524)
^  Call: (259) [user] subst_vars(";; #[test]", _39460, [], _40400)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
   Call: (260) [system] var(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _39460, [], _40400)
^  Unify: (259) [user] subst_vars(";; #[test]", _39460, [], _40400)
   Call: (260) [system] atom(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _39460, [], _40400)
^  Unify: (259) [user] subst_vars(";; #[test]", _39460, [], _40400)
   Call: (260) [system] compound(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _39460, [], _40400)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Exit: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Call: (259) [user] subst_vars([1532, 0], _39462, [], _24524)
^  Unify: (259) [user] subst_vars([1532, 0], [1532, 0], [], [])
   Call: (260) [system] var([1532, 0])
^  Redo: (259) [user] subst_vars([1532, 0], _39462, [], _24524)
^  Unify: (259) [user] subst_vars([1532, 0], [_55332|_55334], [], _24524)
^  Call: (260) [user] subst_vars(1532, _55332, [], _56272)
^  Unify: (260) [user] subst_vars(1532, 1532, [], [])
   Call: (261) [system] var(1532)
^  Redo: (260) [user] subst_vars(1532, _55332, [], _56272)
^  Unify: (260) [user] subst_vars(1532, _55332, [], _56272)
   Call: (261) [system] atom(1532)
^  Redo: (260) [user] subst_vars(1532, _55332, [], _56272)
^  Unify: (260) [user] subst_vars(1532, _55332, [], _56272)
   Call: (261) [system] compound(1532)
^  Redo: (260) [user] subst_vars(1532, _55332, [], _56272)
^  Unify: (260) [user] subst_vars(1532, 1532, [], [])
^  Exit: (260) [user] subst_vars(1532, 1532, [], [])
^  Call: (260) [user] subst_vars([0], _55334, [], _24524)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _55334, [], _24524)
^  Unify: (260) [user] subst_vars([0], [_71204|_71206], [], _24524)
^  Call: (261) [user] subst_vars(0, _71204, [], _72144)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _71204, [], _72144)
^  Unify: (261) [user] subst_vars(0, _71204, [], _72144)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _71204, [], _72144)
^  Unify: (261) [user] subst_vars(0, _71204, [], _72144)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _71204, [], _72144)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _71206, [], _24524)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _71206, [], _24524)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1532, 0], [1532, 0], [], [])
^  Exit: (258) [user] subst_vars([";; #[test]", 1532, 0], [";; #[test]", 1532, 0], [], [])
   Call: (258) [system] compound_name_arguments(_24522, '$COMMENT', [";; #[test]", 1532, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1532, 0), '$COMMENT', [";; #[test]", 1532, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1532, 0), '$COMMENT'(";; #[test]", 1532, 0), [], [])
   Call: (257) [system] _94562=metta_file_buffer(+, '$COMMENT'(";; #[test]", 1532, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; #[test]", 1532, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; #[test]", 1532, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 1532, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 1532, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1532, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1532, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1532, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1532, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1533, 0, 55119, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$stream_position'(55119, 1533, 0, 55153)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _147284))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _147284))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _147284)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _147284)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _147284)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _147284)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _152896))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _152896))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _152896))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _152896))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _152896)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _152896)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _158482))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _158482))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _158482)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _158482)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _158482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _158482)
   Call: (270) [system] var('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _158482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$VAR'(_165942))
   Call: (270) [system] atom('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _158482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _158482)
   Call: (270) [system] '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _158482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _158482)
   Call: (270) [system] '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _158482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _158482)
   Call: (270) [system] '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0)==[_175222, _175228]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _158482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _158482)
   Call: (270) [system] is_list('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _158482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _158482)
   Call: (270) [system] string('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _158482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _158482)
   Call: (270) [system] compound('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
   Exit: (270) [system] compound('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _185424, _185426)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT', [";; fn test_get_doc_func() {", 1533, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; fn test_get_doc_func() {", 1533, 0], _189166)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn test_get_doc_func() {", 1533, 0], _189166)
   Call: (271) [apply] apply:maplist_([";; fn test_get_doc_func() {", 1533, 0], _189166, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; fn test_get_doc_func() {", 1533, 0], [_191984|_191986], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; fn test_get_doc_func() {", _191984)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_func() {", _191984)
   Call: (273) [system] var(";; fn test_get_doc_func() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_func() {", _191984)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_func() {", '$VAR'(_196630))
   Call: (273) [system] atom(";; fn test_get_doc_func() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_func() {", _191984)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_func() {", _191984)
   Call: (273) [system] ";; fn test_get_doc_func() {"==true
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_func() {", _191984)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_func() {", _191984)
   Call: (273) [system] ";; fn test_get_doc_func() {"==false
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_func() {", _191984)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_func() {", _191984)
   Call: (273) [system] ";; fn test_get_doc_func() {"==[_205910, _205916]
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_func() {", _191984)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_func() {", _191984)
   Call: (273) [system] is_list(";; fn test_get_doc_func() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_func() {", _191984)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_func() {", _191984)
   Call: (273) [system] string(";; fn test_get_doc_func() {")
   Exit: (273) [system] string(";; fn test_get_doc_func() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_func() {", _191984)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_func() {", _191984)
   Call: (273) [system] compound(";; fn test_get_doc_func() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_func() {", _191984)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_func() {", _191984)
^  Call: (273) [user] symbol(";; fn test_get_doc_func() {")
^  Unify: (273) [user] symbol(";; fn test_get_doc_func() {")
   Call: (274) [system] atom(";; fn test_get_doc_func() {")
   Fail: (274) [system] atom(";; fn test_get_doc_func() {")
^  Fail: (273) [user] symbol(";; fn test_get_doc_func() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_func() {", _191984)
   Call: (273) [system] ";; fn test_get_doc_func() {"=_191984
   Exit: (273) [system] ";; fn test_get_doc_func() {"=";; fn test_get_doc_func() {"
^  Exit: (272) [user] mfix_vars1(";; fn test_get_doc_func() {", ";; fn test_get_doc_func() {")
   Call: (272) [apply] apply:maplist_([1533, 0], _191986, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1533, 0], [_229982|_229984], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1533, _229982)
^  Unify: (273) [user] mfix_vars1(1533, _229982)
   Call: (274) [system] var(1533)
^  Redo: (273) [user] mfix_vars1(1533, _229982)
^  Unify: (273) [user] mfix_vars1(1533, '$VAR'(_234628))
   Call: (274) [system] atom(1533)
^  Redo: (273) [user] mfix_vars1(1533, _229982)
^  Unify: (273) [user] mfix_vars1(1533, _229982)
   Call: (274) [system] 1533==true
^  Redo: (273) [user] mfix_vars1(1533, _229982)
^  Unify: (273) [user] mfix_vars1(1533, _229982)
   Call: (274) [system] 1533==false
^  Redo: (273) [user] mfix_vars1(1533, _229982)
^  Unify: (273) [user] mfix_vars1(1533, _229982)
   Call: (274) [system] 1533==[_243908, _243914]
^  Redo: (273) [user] mfix_vars1(1533, _229982)
^  Unify: (273) [user] mfix_vars1(1533, _229982)
   Call: (274) [system] is_list(1533)
^  Redo: (273) [user] mfix_vars1(1533, _229982)
^  Unify: (273) [user] mfix_vars1(1533, _229982)
   Call: (274) [system] string(1533)
^  Redo: (273) [user] mfix_vars1(1533, _229982)
^  Unify: (273) [user] mfix_vars1(1533, _229982)
   Call: (274) [system] compound(1533)
^  Redo: (273) [user] mfix_vars1(1533, _229982)
^  Unify: (273) [user] mfix_vars1(1533, _229982)
^  Call: (274) [user] symbol(1533)
^  Unify: (274) [user] symbol(1533)
   Call: (275) [system] atom(1533)
   Fail: (275) [system] atom(1533)
^  Fail: (274) [user] symbol(1533)
^  Redo: (273) [user] mfix_vars1(1533, _229982)
   Call: (274) [system] 1533=_229982
   Exit: (274) [system] 1533=1533
^  Exit: (273) [user] mfix_vars1(1533, 1533)
   Call: (273) [apply] apply:maplist_([0], _229984, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_264308|_264310], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _264308)
^  Unify: (274) [user] mfix_vars1(0, _264308)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _264308)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_268954))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _264308)
^  Unify: (274) [user] mfix_vars1(0, _264308)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _264308)
^  Unify: (274) [user] mfix_vars1(0, _264308)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _264308)
^  Unify: (274) [user] mfix_vars1(0, _264308)
   Call: (275) [system] 0==[_278234, _278240]
^  Redo: (274) [user] mfix_vars1(0, _264308)
^  Unify: (274) [user] mfix_vars1(0, _264308)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _264308)
^  Unify: (274) [user] mfix_vars1(0, _264308)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _264308)
^  Unify: (274) [user] mfix_vars1(0, _264308)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _264308)
^  Unify: (274) [user] mfix_vars1(0, _264308)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _264308)
   Call: (275) [system] 0=_264308
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _264310, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1533, 0], [1533, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; fn test_get_doc_func() {", 1533, 0], [";; fn test_get_doc_func() {", 1533, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn test_get_doc_func() {", 1533, 0], [";; fn test_get_doc_func() {", 1533, 0])
   Call: (270) [system] compound_name_arguments(_158482, '$COMMENT', [";; fn test_get_doc_func() {", 1533, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT', [";; fn test_get_doc_func() {", 1533, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0)\=@='$COMMENT'(";; fn test_get_doc_func() {", 1533, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _152896)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _314482))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _314482))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _314482))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _314482))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _314482)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _314482)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _320068))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _320068))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _320068)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _320068)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _320068)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0)\=@='$COMMENT'(";; fn test_get_doc_func() {", 1533, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _314482)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _147284))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _147284))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _147284))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _147284))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _147284)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _147284)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _342388))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _342388))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _342388)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _342388)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _342388)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0)\=@='$COMMENT'(";; fn test_get_doc_func() {", 1533, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _147284)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0)))
   Call: (261) [system] '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0)\=@='$COMMENT'(";; fn test_get_doc_func() {", 1533, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _371166, [], _371168)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _371166, [], _371168)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _371166, [], _371168)
   Call: (258) [system] atom('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _371166, [], _371168)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _371166, [], _371168)
   Call: (258) [system] compound('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
   Exit: (258) [system] compound('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), _380482, _380484)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT', [";; fn test_get_doc_func() {", 1533, 0])
^  Call: (258) [user] subst_vars([";; fn test_get_doc_func() {", 1533, 0], _382368, [], _371168)
^  Unify: (258) [user] subst_vars([";; fn test_get_doc_func() {", 1533, 0], [";; fn test_get_doc_func() {", 1533, 0], [], [])
   Call: (259) [system] var([";; fn test_get_doc_func() {", 1533, 0])
^  Redo: (258) [user] subst_vars([";; fn test_get_doc_func() {", 1533, 0], _382368, [], _371168)
^  Unify: (258) [user] subst_vars([";; fn test_get_doc_func() {", 1533, 0], [_386104|_386106], [], _371168)
^  Call: (259) [user] subst_vars(";; fn test_get_doc_func() {", _386104, [], _387044)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_func() {", ";; fn test_get_doc_func() {", [], [])
   Call: (260) [system] var(";; fn test_get_doc_func() {")
^  Redo: (259) [user] subst_vars(";; fn test_get_doc_func() {", _386104, [], _387044)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_func() {", _386104, [], _387044)
   Call: (260) [system] atom(";; fn test_get_doc_func() {")
^  Redo: (259) [user] subst_vars(";; fn test_get_doc_func() {", _386104, [], _387044)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_func() {", _386104, [], _387044)
   Call: (260) [system] compound(";; fn test_get_doc_func() {")
^  Redo: (259) [user] subst_vars(";; fn test_get_doc_func() {", _386104, [], _387044)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_func() {", ";; fn test_get_doc_func() {", [], [])
^  Exit: (259) [user] subst_vars(";; fn test_get_doc_func() {", ";; fn test_get_doc_func() {", [], [])
^  Call: (259) [user] subst_vars([1533, 0], _386106, [], _371168)
^  Unify: (259) [user] subst_vars([1533, 0], [1533, 0], [], [])
   Call: (260) [system] var([1533, 0])
^  Redo: (259) [user] subst_vars([1533, 0], _386106, [], _371168)
^  Unify: (259) [user] subst_vars([1533, 0], [_401976|_401978], [], _371168)
^  Call: (260) [user] subst_vars(1533, _401976, [], _402916)
^  Unify: (260) [user] subst_vars(1533, 1533, [], [])
   Call: (261) [system] var(1533)
^  Redo: (260) [user] subst_vars(1533, _401976, [], _402916)
^  Unify: (260) [user] subst_vars(1533, _401976, [], _402916)
   Call: (261) [system] atom(1533)
^  Redo: (260) [user] subst_vars(1533, _401976, [], _402916)
^  Unify: (260) [user] subst_vars(1533, _401976, [], _402916)
   Call: (261) [system] compound(1533)
^  Redo: (260) [user] subst_vars(1533, _401976, [], _402916)
^  Unify: (260) [user] subst_vars(1533, 1533, [], [])
^  Exit: (260) [user] subst_vars(1533, 1533, [], [])
^  Call: (260) [user] subst_vars([0], _401978, [], _371168)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _401978, [], _371168)
^  Unify: (260) [user] subst_vars([0], [_417848|_417850], [], _371168)
^  Call: (261) [user] subst_vars(0, _417848, [], _418788)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _417848, [], _418788)
^  Unify: (261) [user] subst_vars(0, _417848, [], _418788)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _417848, [], _418788)
^  Unify: (261) [user] subst_vars(0, _417848, [], _418788)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _417848, [], _418788)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _417850, [], _371168)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _417850, [], _371168)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1533, 0], [1533, 0], [], [])
^  Exit: (258) [user] subst_vars([";; fn test_get_doc_func() {", 1533, 0], [";; fn test_get_doc_func() {", 1533, 0], [], [])
   Call: (258) [system] compound_name_arguments(_371166, '$COMMENT', [";; fn test_get_doc_func() {", 1533, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT', [";; fn test_get_doc_func() {", 1533, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), [], [])
   Call: (257) [system] _441206=metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_func() {", 1533, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1534, 0, 55147, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$stream_position'(55147, 1534, 0, 55181)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _493936))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _493936))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _493936)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _493936)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _493936)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _493936)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _499548))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _499548))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _499548))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _499548))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _499548)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _499548)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _505134))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _505134))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _505134)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _505134)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _505134)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _505134)
   Call: (270) [system] var('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _505134)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$VAR'(_512594))
   Call: (270) [system] atom('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _505134)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _505134)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _505134)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _505134)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _505134)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _505134)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0)==[_521874, _521880]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _505134)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _5990)
   Call: (270) [system] is_list('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _5990)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _5990)
   Call: (270) [system] string('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _5990)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _5990)
   Call: (270) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _14158, _14160)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0], _17900)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0], _17900)
   Call: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0], _17900, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0], [_20718|_20720], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _20718)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _20718)
   Call: (273) [system] var(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _20718)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", '$VAR'(_25364))
   Call: (273) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _20718)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _20718)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==true
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _20718)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _20718)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==false
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _20718)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _20718)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==[_34644, _34650]
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _20718)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _20718)
   Call: (273) [system] is_list(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _20718)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _20718)
   Call: (273) [system] string(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Exit: (273) [system] string(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _20718)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _20718)
   Call: (273) [system] compound(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _20718)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _20718)
^  Call: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Unify: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (274) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Fail: (274) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Fail: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _20718)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"=_20718
   Exit: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"=";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"
^  Exit: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (272) [apply] apply:maplist_([1534, 0], _20720, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1534, 0], [_58716|_58718], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1534, _58716)
^  Unify: (273) [user] mfix_vars1(1534, _58716)
   Call: (274) [system] var(1534)
^  Redo: (273) [user] mfix_vars1(1534, _58716)
^  Unify: (273) [user] mfix_vars1(1534, '$VAR'(_63362))
   Call: (274) [system] atom(1534)
^  Redo: (273) [user] mfix_vars1(1534, _58716)
^  Unify: (273) [user] mfix_vars1(1534, _58716)
   Call: (274) [system] 1534==true
^  Redo: (273) [user] mfix_vars1(1534, _58716)
^  Unify: (273) [user] mfix_vars1(1534, _58716)
   Call: (274) [system] 1534==false
^  Redo: (273) [user] mfix_vars1(1534, _58716)
^  Unify: (273) [user] mfix_vars1(1534, _58716)
   Call: (274) [system] 1534==[_72642, _72648]
^  Redo: (273) [user] mfix_vars1(1534, _58716)
^  Unify: (273) [user] mfix_vars1(1534, _58716)
   Call: (274) [system] is_list(1534)
^  Redo: (273) [user] mfix_vars1(1534, _58716)
^  Unify: (273) [user] mfix_vars1(1534, _58716)
   Call: (274) [system] string(1534)
^  Redo: (273) [user] mfix_vars1(1534, _58716)
^  Unify: (273) [user] mfix_vars1(1534, _58716)
   Call: (274) [system] compound(1534)
^  Redo: (273) [user] mfix_vars1(1534, _58716)
^  Unify: (273) [user] mfix_vars1(1534, _58716)
^  Call: (274) [user] symbol(1534)
^  Unify: (274) [user] symbol(1534)
   Call: (275) [system] atom(1534)
   Fail: (275) [system] atom(1534)
^  Fail: (274) [user] symbol(1534)
^  Redo: (273) [user] mfix_vars1(1534, _58716)
   Call: (274) [system] 1534=_58716
   Exit: (274) [system] 1534=1534
^  Exit: (273) [user] mfix_vars1(1534, 1534)
   Call: (273) [apply] apply:maplist_([0], _58718, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_93042|_93044], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _93042)
^  Unify: (274) [user] mfix_vars1(0, _93042)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _93042)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_97688))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _93042)
^  Unify: (274) [user] mfix_vars1(0, _93042)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _93042)
^  Unify: (274) [user] mfix_vars1(0, _93042)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _93042)
^  Unify: (274) [user] mfix_vars1(0, _93042)
   Call: (275) [system] 0==[_106968, _106974]
^  Redo: (274) [user] mfix_vars1(0, _93042)
^  Unify: (274) [user] mfix_vars1(0, _93042)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _93042)
^  Unify: (274) [user] mfix_vars1(0, _93042)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _93042)
^  Unify: (274) [user] mfix_vars1(0, _93042)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _93042)
^  Unify: (274) [user] mfix_vars1(0, _93042)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _93042)
   Call: (275) [system] 0=_93042
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _93044, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1534, 0], [1534, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0])
   Call: (270) [system] compound_name_arguments(_5990, '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _5976)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _143216))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _143216))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _143216))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _143216))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _143216)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _143216)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _148802))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _148802))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _148802)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _148802)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _148802)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _143216)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _5956))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _5956))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _5956))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _5956))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _5956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _5956)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _171122))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _171122))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _171122)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _171122)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _171122)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _5956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0)))
   Call: (261) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _199900, [], _199902)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _199900, [], _199902)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _199900, [], _199902)
   Call: (258) [system] atom('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _199900, [], _199902)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _199900, [], _199902)
   Call: (258) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), _209216, _209218)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0])
^  Call: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0], _211102, [], _199902)
^  Unify: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0], [], [])
   Call: (259) [system] var([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0])
^  Redo: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0], _211102, [], _199902)
^  Unify: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0], [_214838|_214840], [], _199902)
^  Call: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _214838, [], _215778)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
   Call: (260) [system] var(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _214838, [], _215778)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _214838, [], _215778)
   Call: (260) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _214838, [], _215778)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _214838, [], _215778)
   Call: (260) [system] compound(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _214838, [], _215778)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Exit: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Call: (259) [user] subst_vars([1534, 0], _214840, [], _199902)
^  Unify: (259) [user] subst_vars([1534, 0], [1534, 0], [], [])
   Call: (260) [system] var([1534, 0])
^  Redo: (259) [user] subst_vars([1534, 0], _214840, [], _199902)
^  Unify: (259) [user] subst_vars([1534, 0], [_230710|_230712], [], _199902)
^  Call: (260) [user] subst_vars(1534, _230710, [], _231650)
^  Unify: (260) [user] subst_vars(1534, 1534, [], [])
   Call: (261) [system] var(1534)
^  Redo: (260) [user] subst_vars(1534, _230710, [], _231650)
^  Unify: (260) [user] subst_vars(1534, _230710, [], _231650)
   Call: (261) [system] atom(1534)
^  Redo: (260) [user] subst_vars(1534, _230710, [], _231650)
^  Unify: (260) [user] subst_vars(1534, _230710, [], _231650)
   Call: (261) [system] compound(1534)
^  Redo: (260) [user] subst_vars(1534, _230710, [], _231650)
^  Unify: (260) [user] subst_vars(1534, 1534, [], [])
^  Exit: (260) [user] subst_vars(1534, 1534, [], [])
^  Call: (260) [user] subst_vars([0], _230712, [], _199902)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _230712, [], _199902)
^  Unify: (260) [user] subst_vars([0], [_246582|_246584], [], _199902)
^  Call: (261) [user] subst_vars(0, _246582, [], _247522)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _246582, [], _247522)
^  Unify: (261) [user] subst_vars(0, _246582, [], _247522)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _246582, [], _247522)
^  Unify: (261) [user] subst_vars(0, _246582, [], _247522)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _246582, [], _247522)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _246584, [], _199902)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _246584, [], _199902)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1534, 0], [1534, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0], [], [])
   Call: (258) [system] compound_name_arguments(_199900, '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), [], [])
   Call: (257) [system] _269940=metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1534, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1535, 0, 55208, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$stream_position'(55208, 1535, 0, 55242)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _322666))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _322666))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _322666)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _322666)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _322666)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _322666)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _328278))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _328278))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _328278))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _328278))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _328278)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _328278)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _333864))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _333864))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _333864)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _333864)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _333864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _333864)
   Call: (270) [system] var('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _333864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$VAR'(_341324))
   Call: (270) [system] atom('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _333864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _333864)
   Call: (270) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _333864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _333864)
   Call: (270) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _333864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _333864)
   Call: (270) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0)==[_350604, _350610]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _333864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _333864)
   Call: (270) [system] is_list('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _333864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _333864)
   Call: (270) [system] string('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _333864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _333864)
   Call: (270) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _360806, _360808)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1535, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     let parser = SExprParser::new(r#\"", 1535, 0], _364548)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let parser = SExprParser::new(r#\"", 1535, 0], _364548)
   Call: (271) [apply] apply:maplist_([";;     let parser = SExprParser::new(r#\"", 1535, 0], _364548, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     let parser = SExprParser::new(r#\"", 1535, 0], [_367366|_367368], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _367366)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _367366)
   Call: (273) [system] var(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _367366)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", '$VAR'(_372012))
   Call: (273) [system] atom(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _367366)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _367366)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""==true
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _367366)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _367366)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""==false
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _367366)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _367366)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""==[_381292, _381298]
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _367366)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _367366)
   Call: (273) [system] is_list(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _367366)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _367366)
   Call: (273) [system] string(";;     let parser = SExprParser::new(r#\"")
   Exit: (273) [system] string(";;     let parser = SExprParser::new(r#\"")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _367366)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _367366)
   Call: (273) [system] compound(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _367366)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _367366)
^  Call: (273) [user] symbol(";;     let parser = SExprParser::new(r#\"")
^  Unify: (273) [user] symbol(";;     let parser = SExprParser::new(r#\"")
   Call: (274) [system] atom(";;     let parser = SExprParser::new(r#\"")
   Fail: (274) [system] atom(";;     let parser = SExprParser::new(r#\"")
^  Fail: (273) [user] symbol(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _367366)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""=_367366
   Exit: (273) [system] ";;     let parser = SExprParser::new(r#\""=";;     let parser = SExprParser::new(r#\""
^  Exit: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"")
   Call: (272) [apply] apply:maplist_([1535, 0], _367368, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1535, 0], [_405364|_405366], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1535, _405364)
^  Unify: (273) [user] mfix_vars1(1535, _405364)
   Call: (274) [system] var(1535)
^  Redo: (273) [user] mfix_vars1(1535, _405364)
^  Unify: (273) [user] mfix_vars1(1535, '$VAR'(_410010))
   Call: (274) [system] atom(1535)
^  Redo: (273) [user] mfix_vars1(1535, _405364)
^  Unify: (273) [user] mfix_vars1(1535, _405364)
   Call: (274) [system] 1535==true
^  Redo: (273) [user] mfix_vars1(1535, _405364)
^  Unify: (273) [user] mfix_vars1(1535, _405364)
   Call: (274) [system] 1535==false
^  Redo: (273) [user] mfix_vars1(1535, _405364)
^  Unify: (273) [user] mfix_vars1(1535, _405364)
   Call: (274) [system] 1535==[_419290, _419296]
^  Redo: (273) [user] mfix_vars1(1535, _405364)
^  Unify: (273) [user] mfix_vars1(1535, _405364)
   Call: (274) [system] is_list(1535)
^  Redo: (273) [user] mfix_vars1(1535, _405364)
^  Unify: (273) [user] mfix_vars1(1535, _405364)
   Call: (274) [system] string(1535)
^  Redo: (273) [user] mfix_vars1(1535, _405364)
^  Unify: (273) [user] mfix_vars1(1535, _405364)
   Call: (274) [system] compound(1535)
^  Redo: (273) [user] mfix_vars1(1535, _405364)
^  Unify: (273) [user] mfix_vars1(1535, _405364)
^  Call: (274) [user] symbol(1535)
^  Unify: (274) [user] symbol(1535)
   Call: (275) [system] atom(1535)
   Fail: (275) [system] atom(1535)
^  Fail: (274) [user] symbol(1535)
^  Redo: (273) [user] mfix_vars1(1535, _405364)
   Call: (274) [system] 1535=_405364
   Exit: (274) [system] 1535=1535
^  Exit: (273) [user] mfix_vars1(1535, 1535)
   Call: (273) [apply] apply:maplist_([0], _405366, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_439690|_439692], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _439690)
^  Unify: (274) [user] mfix_vars1(0, _439690)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _439690)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_444336))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _439690)
^  Unify: (274) [user] mfix_vars1(0, _439690)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _439690)
^  Unify: (274) [user] mfix_vars1(0, _439690)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _439690)
^  Unify: (274) [user] mfix_vars1(0, _439690)
   Call: (275) [system] 0==[_453616, _453622]
^  Redo: (274) [user] mfix_vars1(0, _439690)
^  Unify: (274) [user] mfix_vars1(0, _439690)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _439690)
^  Unify: (274) [user] mfix_vars1(0, _439690)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _439690)
^  Unify: (274) [user] mfix_vars1(0, _439690)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _439690)
^  Unify: (274) [user] mfix_vars1(0, _439690)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _439690)
   Call: (275) [system] 0=_439690
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _439692, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1535, 0], [1535, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     let parser = SExprParser::new(r#\"", 1535, 0], [";;     let parser = SExprParser::new(r#\"", 1535, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let parser = SExprParser::new(r#\"", 1535, 0], [";;     let parser = SExprParser::new(r#\"", 1535, 0])
   Call: (270) [system] compound_name_arguments(_333864, '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1535, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1535, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0)))
   Call: (267) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _328278)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _489864))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _489864))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _489864))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _489864))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _489864)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _489864)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _495450))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _495450))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _495450)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _495450)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _495450)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0)))
   Call: (267) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _489864)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _322666))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _322666))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _322666))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _322666))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _322666)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _322666)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _517770))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _517770))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _517770)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _517770)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _517770)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0)))
   Call: (267) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0)))
   Call: (261) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _28608, [], _28610)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _28608, [], _28610)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _28608, [], _28610)
   Call: (258) [system] atom('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _28608, [], _28610)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _28608, [], _28610)
   Call: (258) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), _37924, _37926)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1535, 0])
^  Call: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1535, 0], _39810, [], _28610)
^  Unify: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1535, 0], [";;     let parser = SExprParser::new(r#\"", 1535, 0], [], [])
   Call: (259) [system] var([";;     let parser = SExprParser::new(r#\"", 1535, 0])
^  Redo: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1535, 0], _39810, [], _28610)
^  Unify: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1535, 0], [_43546|_43548], [], _28610)
^  Call: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _43546, [], _44486)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"", [], [])
   Call: (260) [system] var(";;     let parser = SExprParser::new(r#\"")
^  Redo: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _43546, [], _44486)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _43546, [], _44486)
   Call: (260) [system] atom(";;     let parser = SExprParser::new(r#\"")
^  Redo: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _43546, [], _44486)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _43546, [], _44486)
   Call: (260) [system] compound(";;     let parser = SExprParser::new(r#\"")
^  Redo: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _43546, [], _44486)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"", [], [])
^  Exit: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"", [], [])
^  Call: (259) [user] subst_vars([1535, 0], _43548, [], _28610)
^  Unify: (259) [user] subst_vars([1535, 0], [1535, 0], [], [])
   Call: (260) [system] var([1535, 0])
^  Redo: (259) [user] subst_vars([1535, 0], _43548, [], _28610)
^  Unify: (259) [user] subst_vars([1535, 0], [_59418|_59420], [], _28610)
^  Call: (260) [user] subst_vars(1535, _59418, [], _60358)
^  Unify: (260) [user] subst_vars(1535, 1535, [], [])
   Call: (261) [system] var(1535)
^  Redo: (260) [user] subst_vars(1535, _59418, [], _60358)
^  Unify: (260) [user] subst_vars(1535, _59418, [], _60358)
   Call: (261) [system] atom(1535)
^  Redo: (260) [user] subst_vars(1535, _59418, [], _60358)
^  Unify: (260) [user] subst_vars(1535, _59418, [], _60358)
   Call: (261) [system] compound(1535)
^  Redo: (260) [user] subst_vars(1535, _59418, [], _60358)
^  Unify: (260) [user] subst_vars(1535, 1535, [], [])
^  Exit: (260) [user] subst_vars(1535, 1535, [], [])
^  Call: (260) [user] subst_vars([0], _59420, [], _28610)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _59420, [], _28610)
^  Unify: (260) [user] subst_vars([0], [_75290|_75292], [], _28610)
^  Call: (261) [user] subst_vars(0, _75290, [], _76230)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _75290, [], _76230)
^  Unify: (261) [user] subst_vars(0, _75290, [], _76230)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _75290, [], _76230)
^  Unify: (261) [user] subst_vars(0, _75290, [], _76230)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _75290, [], _76230)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _75292, [], _28610)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _75292, [], _28610)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1535, 0], [1535, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1535, 0], [";;     let parser = SExprParser::new(r#\"", 1535, 0], [], [])
   Call: (258) [system] compound_name_arguments(_28608, '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1535, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1535, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), [], [])
   Call: (257) [system] _98648=metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1535, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1536, 0, 55249, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$stream_position'(55249, 1536, 0, 55283)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _151370))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _151370))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _151370)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _151370)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _151370)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _151370)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _156982))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _156982))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _156982))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _156982))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _156982)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _156982)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _162568))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _162568))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _162568)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _162568)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _162568)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _162568)
   Call: (270) [system] var('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _162568)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$VAR'(_170028))
   Call: (270) [system] atom('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _162568)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _162568)
   Call: (270) [system] '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _162568)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _162568)
   Call: (270) [system] '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _162568)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _162568)
   Call: (270) [system] '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0)==[_179308, _179314]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _162568)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _162568)
   Call: (270) [system] is_list('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _162568)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _162568)
   Call: (270) [system] string('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _162568)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _162568)
   Call: (270) [system] compound('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _189510, _189512)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT', [";;         (: Arg1Type Type)", 1536, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         (: Arg1Type Type)", 1536, 0], _193252)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (: Arg1Type Type)", 1536, 0], _193252)
   Call: (271) [apply] apply:maplist_([";;         (: Arg1Type Type)", 1536, 0], _193252, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         (: Arg1Type Type)", 1536, 0], [_196070|_196072], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _196070)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _196070)
   Call: (273) [system] var(";;         (: Arg1Type Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _196070)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", '$VAR'(_200716))
   Call: (273) [system] atom(";;         (: Arg1Type Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _196070)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _196070)
   Call: (273) [system] ";;         (: Arg1Type Type)"==true
^  Redo: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _196070)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _196070)
   Call: (273) [system] ";;         (: Arg1Type Type)"==false
^  Redo: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _196070)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _196070)
   Call: (273) [system] ";;         (: Arg1Type Type)"==[_209996, _210002]
^  Redo: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _196070)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _196070)
   Call: (273) [system] is_list(";;         (: Arg1Type Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _196070)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _196070)
   Call: (273) [system] string(";;         (: Arg1Type Type)")
   Exit: (273) [system] string(";;         (: Arg1Type Type)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _196070)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _196070)
   Call: (273) [system] compound(";;         (: Arg1Type Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _196070)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _196070)
^  Call: (273) [user] symbol(";;         (: Arg1Type Type)")
^  Unify: (273) [user] symbol(";;         (: Arg1Type Type)")
   Call: (274) [system] atom(";;         (: Arg1Type Type)")
   Fail: (274) [system] atom(";;         (: Arg1Type Type)")
^  Fail: (273) [user] symbol(";;         (: Arg1Type Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _196070)
   Call: (273) [system] ";;         (: Arg1Type Type)"=_196070
   Exit: (273) [system] ";;         (: Arg1Type Type)"=";;         (: Arg1Type Type)"
^  Exit: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", ";;         (: Arg1Type Type)")
   Call: (272) [apply] apply:maplist_([1536, 0], _196072, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1536, 0], [_234068|_234070], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1536, _234068)
^  Unify: (273) [user] mfix_vars1(1536, _234068)
   Call: (274) [system] var(1536)
^  Redo: (273) [user] mfix_vars1(1536, _234068)
^  Unify: (273) [user] mfix_vars1(1536, '$VAR'(_238714))
   Call: (274) [system] atom(1536)
^  Redo: (273) [user] mfix_vars1(1536, _234068)
^  Unify: (273) [user] mfix_vars1(1536, _234068)
   Call: (274) [system] 1536==true
^  Redo: (273) [user] mfix_vars1(1536, _234068)
^  Unify: (273) [user] mfix_vars1(1536, _234068)
   Call: (274) [system] 1536==false
^  Redo: (273) [user] mfix_vars1(1536, _234068)
^  Unify: (273) [user] mfix_vars1(1536, _234068)
   Call: (274) [system] 1536==[_247994, _248000]
^  Redo: (273) [user] mfix_vars1(1536, _234068)
^  Unify: (273) [user] mfix_vars1(1536, _234068)
   Call: (274) [system] is_list(1536)
^  Redo: (273) [user] mfix_vars1(1536, _234068)
^  Unify: (273) [user] mfix_vars1(1536, _234068)
   Call: (274) [system] string(1536)
^  Redo: (273) [user] mfix_vars1(1536, _234068)
^  Unify: (273) [user] mfix_vars1(1536, _234068)
   Call: (274) [system] compound(1536)
^  Redo: (273) [user] mfix_vars1(1536, _234068)
^  Unify: (273) [user] mfix_vars1(1536, _234068)
^  Call: (274) [user] symbol(1536)
^  Unify: (274) [user] symbol(1536)
   Call: (275) [system] atom(1536)
   Fail: (275) [system] atom(1536)
^  Fail: (274) [user] symbol(1536)
^  Redo: (273) [user] mfix_vars1(1536, _234068)
   Call: (274) [system] 1536=_234068
   Exit: (274) [system] 1536=1536
^  Exit: (273) [user] mfix_vars1(1536, 1536)
   Call: (273) [apply] apply:maplist_([0], _234070, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_268394|_268396], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _268394)
^  Unify: (274) [user] mfix_vars1(0, _268394)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _268394)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_273040))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _268394)
^  Unify: (274) [user] mfix_vars1(0, _268394)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _268394)
^  Unify: (274) [user] mfix_vars1(0, _268394)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _268394)
^  Unify: (274) [user] mfix_vars1(0, _268394)
   Call: (275) [system] 0==[_282320, _282326]
^  Redo: (274) [user] mfix_vars1(0, _268394)
^  Unify: (274) [user] mfix_vars1(0, _268394)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _268394)
^  Unify: (274) [user] mfix_vars1(0, _268394)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _268394)
^  Unify: (274) [user] mfix_vars1(0, _268394)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _268394)
^  Unify: (274) [user] mfix_vars1(0, _268394)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _268394)
   Call: (275) [system] 0=_268394
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _268396, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1536, 0], [1536, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         (: Arg1Type Type)", 1536, 0], [";;         (: Arg1Type Type)", 1536, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (: Arg1Type Type)", 1536, 0], [";;         (: Arg1Type Type)", 1536, 0])
   Call: (270) [system] compound_name_arguments(_162568, '$COMMENT', [";;         (: Arg1Type Type)", 1536, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT', [";;         (: Arg1Type Type)", 1536, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0)\=@='$COMMENT'(";;         (: Arg1Type Type)", 1536, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _156982)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _318568))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _318568))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _318568))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _318568))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _318568)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _318568)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _324154))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _324154))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _324154)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _324154)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _324154)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0)\=@='$COMMENT'(";;         (: Arg1Type Type)", 1536, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _318568)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _151370))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _151370))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _151370))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _151370))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _151370)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _151370)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _346474))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _346474))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _346474)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _346474)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _346474)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0)\=@='$COMMENT'(";;         (: Arg1Type Type)", 1536, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _151370)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0)))
   Call: (261) [system] '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0)\=@='$COMMENT'(";;         (: Arg1Type Type)", 1536, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _375252, [], _375254)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _375252, [], _375254)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _375252, [], _375254)
   Call: (258) [system] atom('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _375252, [], _375254)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _375252, [], _375254)
   Call: (258) [system] compound('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), _384568, _384570)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT', [";;         (: Arg1Type Type)", 1536, 0])
^  Call: (258) [user] subst_vars([";;         (: Arg1Type Type)", 1536, 0], _386454, [], _375254)
^  Unify: (258) [user] subst_vars([";;         (: Arg1Type Type)", 1536, 0], [";;         (: Arg1Type Type)", 1536, 0], [], [])
   Call: (259) [system] var([";;         (: Arg1Type Type)", 1536, 0])
^  Redo: (258) [user] subst_vars([";;         (: Arg1Type Type)", 1536, 0], _386454, [], _375254)
^  Unify: (258) [user] subst_vars([";;         (: Arg1Type Type)", 1536, 0], [_390190|_390192], [], _375254)
^  Call: (259) [user] subst_vars(";;         (: Arg1Type Type)", _390190, [], _391130)
^  Unify: (259) [user] subst_vars(";;         (: Arg1Type Type)", ";;         (: Arg1Type Type)", [], [])
   Call: (260) [system] var(";;         (: Arg1Type Type)")
^  Redo: (259) [user] subst_vars(";;         (: Arg1Type Type)", _390190, [], _391130)
^  Unify: (259) [user] subst_vars(";;         (: Arg1Type Type)", _390190, [], _391130)
   Call: (260) [system] atom(";;         (: Arg1Type Type)")
^  Redo: (259) [user] subst_vars(";;         (: Arg1Type Type)", _390190, [], _391130)
^  Unify: (259) [user] subst_vars(";;         (: Arg1Type Type)", _390190, [], _391130)
   Call: (260) [system] compound(";;         (: Arg1Type Type)")
^  Redo: (259) [user] subst_vars(";;         (: Arg1Type Type)", _390190, [], _391130)
^  Unify: (259) [user] subst_vars(";;         (: Arg1Type Type)", ";;         (: Arg1Type Type)", [], [])
^  Exit: (259) [user] subst_vars(";;         (: Arg1Type Type)", ";;         (: Arg1Type Type)", [], [])
^  Call: (259) [user] subst_vars([1536, 0], _390192, [], _375254)
^  Unify: (259) [user] subst_vars([1536, 0], [1536, 0], [], [])
   Call: (260) [system] var([1536, 0])
^  Redo: (259) [user] subst_vars([1536, 0], _390192, [], _375254)
^  Unify: (259) [user] subst_vars([1536, 0], [_406062|_406064], [], _375254)
^  Call: (260) [user] subst_vars(1536, _406062, [], _407002)
^  Unify: (260) [user] subst_vars(1536, 1536, [], [])
   Call: (261) [system] var(1536)
^  Redo: (260) [user] subst_vars(1536, _406062, [], _407002)
^  Unify: (260) [user] subst_vars(1536, _406062, [], _407002)
   Call: (261) [system] atom(1536)
^  Redo: (260) [user] subst_vars(1536, _406062, [], _407002)
^  Unify: (260) [user] subst_vars(1536, _406062, [], _407002)
   Call: (261) [system] compound(1536)
^  Redo: (260) [user] subst_vars(1536, _406062, [], _407002)
^  Unify: (260) [user] subst_vars(1536, 1536, [], [])
^  Exit: (260) [user] subst_vars(1536, 1536, [], [])
^  Call: (260) [user] subst_vars([0], _406064, [], _375254)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _406064, [], _375254)
^  Unify: (260) [user] subst_vars([0], [_421934|_421936], [], _375254)
^  Call: (261) [user] subst_vars(0, _421934, [], _422874)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _421934, [], _422874)
^  Unify: (261) [user] subst_vars(0, _421934, [], _422874)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _421934, [], _422874)
^  Unify: (261) [user] subst_vars(0, _421934, [], _422874)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _421934, [], _422874)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _421936, [], _375254)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _421936, [], _375254)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1536, 0], [1536, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         (: Arg1Type Type)", 1536, 0], [";;         (: Arg1Type Type)", 1536, 0], [], [])
   Call: (258) [system] compound_name_arguments(_375252, '$COMMENT', [";;         (: Arg1Type Type)", 1536, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT', [";;         (: Arg1Type Type)", 1536, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), [], [])
   Call: (257) [system] _445292=metta_file_buffer(+, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: Arg1Type Type)", 1536, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1537, 0, 55278, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$stream_position'(55278, 1537, 0, 55312)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _498014))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _498014))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _498014)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _498014)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _498014)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _498014)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _503626))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _503626))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _503626))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _503626))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _503626)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _503626)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _509212))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _509212))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _509212)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _509212)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _509212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _509212)
   Call: (270) [system] var('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _509212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$VAR'(_516672))
   Call: (270) [system] atom('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _509212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _509212)
   Call: (270) [system] '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _509212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _509212)
   Call: (270) [system] '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _5982)
   Call: (270) [system] '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0)==[_7816, _7822]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _5982)
   Call: (270) [system] is_list('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _5982)
   Call: (270) [system] string('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _5982)
   Call: (270) [system] compound('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _18018, _18020)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT', [";;         (: Arg2Type Type)", 1537, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         (: Arg2Type Type)", 1537, 0], _21760)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (: Arg2Type Type)", 1537, 0], _21760)
   Call: (271) [apply] apply:maplist_([";;         (: Arg2Type Type)", 1537, 0], _21760, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         (: Arg2Type Type)", 1537, 0], [_24578|_24580], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _24578)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _24578)
   Call: (273) [system] var(";;         (: Arg2Type Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _24578)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", '$VAR'(_29224))
   Call: (273) [system] atom(";;         (: Arg2Type Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _24578)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _24578)
   Call: (273) [system] ";;         (: Arg2Type Type)"==true
^  Redo: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _24578)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _24578)
   Call: (273) [system] ";;         (: Arg2Type Type)"==false
^  Redo: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _24578)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _24578)
   Call: (273) [system] ";;         (: Arg2Type Type)"==[_38504, _38510]
^  Redo: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _24578)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _24578)
   Call: (273) [system] is_list(";;         (: Arg2Type Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _24578)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _24578)
   Call: (273) [system] string(";;         (: Arg2Type Type)")
   Exit: (273) [system] string(";;         (: Arg2Type Type)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _24578)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _24578)
   Call: (273) [system] compound(";;         (: Arg2Type Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _24578)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _24578)
^  Call: (273) [user] symbol(";;         (: Arg2Type Type)")
^  Unify: (273) [user] symbol(";;         (: Arg2Type Type)")
   Call: (274) [system] atom(";;         (: Arg2Type Type)")
   Fail: (274) [system] atom(";;         (: Arg2Type Type)")
^  Fail: (273) [user] symbol(";;         (: Arg2Type Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _24578)
   Call: (273) [system] ";;         (: Arg2Type Type)"=_24578
   Exit: (273) [system] ";;         (: Arg2Type Type)"=";;         (: Arg2Type Type)"
^  Exit: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", ";;         (: Arg2Type Type)")
   Call: (272) [apply] apply:maplist_([1537, 0], _24580, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1537, 0], [_62576|_62578], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1537, _62576)
^  Unify: (273) [user] mfix_vars1(1537, _62576)
   Call: (274) [system] var(1537)
^  Redo: (273) [user] mfix_vars1(1537, _62576)
^  Unify: (273) [user] mfix_vars1(1537, '$VAR'(_67222))
   Call: (274) [system] atom(1537)
^  Redo: (273) [user] mfix_vars1(1537, _62576)
^  Unify: (273) [user] mfix_vars1(1537, _62576)
   Call: (274) [system] 1537==true
^  Redo: (273) [user] mfix_vars1(1537, _62576)
^  Unify: (273) [user] mfix_vars1(1537, _62576)
   Call: (274) [system] 1537==false
^  Redo: (273) [user] mfix_vars1(1537, _62576)
^  Unify: (273) [user] mfix_vars1(1537, _62576)
   Call: (274) [system] 1537==[_76502, _76508]
^  Redo: (273) [user] mfix_vars1(1537, _62576)
^  Unify: (273) [user] mfix_vars1(1537, _62576)
   Call: (274) [system] is_list(1537)
^  Redo: (273) [user] mfix_vars1(1537, _62576)
^  Unify: (273) [user] mfix_vars1(1537, _62576)
   Call: (274) [system] string(1537)
^  Redo: (273) [user] mfix_vars1(1537, _62576)
^  Unify: (273) [user] mfix_vars1(1537, _62576)
   Call: (274) [system] compound(1537)
^  Redo: (273) [user] mfix_vars1(1537, _62576)
^  Unify: (273) [user] mfix_vars1(1537, _62576)
^  Call: (274) [user] symbol(1537)
^  Unify: (274) [user] symbol(1537)
   Call: (275) [system] atom(1537)
   Fail: (275) [system] atom(1537)
^  Fail: (274) [user] symbol(1537)
^  Redo: (273) [user] mfix_vars1(1537, _62576)
   Call: (274) [system] 1537=_62576
   Exit: (274) [system] 1537=1537
^  Exit: (273) [user] mfix_vars1(1537, 1537)
   Call: (273) [apply] apply:maplist_([0], _62578, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_96902|_96904], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _96902)
^  Unify: (274) [user] mfix_vars1(0, _96902)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _96902)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_101548))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _96902)
^  Unify: (274) [user] mfix_vars1(0, _96902)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _96902)
^  Unify: (274) [user] mfix_vars1(0, _96902)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _96902)
^  Unify: (274) [user] mfix_vars1(0, _96902)
   Call: (275) [system] 0==[_110828, _110834]
^  Redo: (274) [user] mfix_vars1(0, _96902)
^  Unify: (274) [user] mfix_vars1(0, _96902)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _96902)
^  Unify: (274) [user] mfix_vars1(0, _96902)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _96902)
^  Unify: (274) [user] mfix_vars1(0, _96902)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _96902)
^  Unify: (274) [user] mfix_vars1(0, _96902)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _96902)
   Call: (275) [system] 0=_96902
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _96904, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1537, 0], [1537, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         (: Arg2Type Type)", 1537, 0], [";;         (: Arg2Type Type)", 1537, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (: Arg2Type Type)", 1537, 0], [";;         (: Arg2Type Type)", 1537, 0])
   Call: (270) [system] compound_name_arguments(_5982, '$COMMENT', [";;         (: Arg2Type Type)", 1537, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT', [";;         (: Arg2Type Type)", 1537, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0)\=@='$COMMENT'(";;         (: Arg2Type Type)", 1537, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _5968)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _147076))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _147076))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _147076))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _147076))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _147076)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _147076)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _152662))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _152662))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _152662)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _152662)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _152662)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0)\=@='$COMMENT'(";;         (: Arg2Type Type)", 1537, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _147076)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _5948))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _5948))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _5948))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _5948))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _5948)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _174982))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _174982))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _174982)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _174982)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _174982)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0)\=@='$COMMENT'(";;         (: Arg2Type Type)", 1537, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0)))
   Call: (261) [system] '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0)\=@='$COMMENT'(";;         (: Arg2Type Type)", 1537, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _203760, [], _203762)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _203760, [], _203762)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _203760, [], _203762)
   Call: (258) [system] atom('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _203760, [], _203762)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _203760, [], _203762)
   Call: (258) [system] compound('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), _213076, _213078)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT', [";;         (: Arg2Type Type)", 1537, 0])
^  Call: (258) [user] subst_vars([";;         (: Arg2Type Type)", 1537, 0], _214962, [], _203762)
^  Unify: (258) [user] subst_vars([";;         (: Arg2Type Type)", 1537, 0], [";;         (: Arg2Type Type)", 1537, 0], [], [])
   Call: (259) [system] var([";;         (: Arg2Type Type)", 1537, 0])
^  Redo: (258) [user] subst_vars([";;         (: Arg2Type Type)", 1537, 0], _214962, [], _203762)
^  Unify: (258) [user] subst_vars([";;         (: Arg2Type Type)", 1537, 0], [_218698|_218700], [], _203762)
^  Call: (259) [user] subst_vars(";;         (: Arg2Type Type)", _218698, [], _219638)
^  Unify: (259) [user] subst_vars(";;         (: Arg2Type Type)", ";;         (: Arg2Type Type)", [], [])
   Call: (260) [system] var(";;         (: Arg2Type Type)")
^  Redo: (259) [user] subst_vars(";;         (: Arg2Type Type)", _218698, [], _219638)
^  Unify: (259) [user] subst_vars(";;         (: Arg2Type Type)", _218698, [], _219638)
   Call: (260) [system] atom(";;         (: Arg2Type Type)")
^  Redo: (259) [user] subst_vars(";;         (: Arg2Type Type)", _218698, [], _219638)
^  Unify: (259) [user] subst_vars(";;         (: Arg2Type Type)", _218698, [], _219638)
   Call: (260) [system] compound(";;         (: Arg2Type Type)")
^  Redo: (259) [user] subst_vars(";;         (: Arg2Type Type)", _218698, [], _219638)
^  Unify: (259) [user] subst_vars(";;         (: Arg2Type Type)", ";;         (: Arg2Type Type)", [], [])
^  Exit: (259) [user] subst_vars(";;         (: Arg2Type Type)", ";;         (: Arg2Type Type)", [], [])
^  Call: (259) [user] subst_vars([1537, 0], _218700, [], _203762)
^  Unify: (259) [user] subst_vars([1537, 0], [1537, 0], [], [])
   Call: (260) [system] var([1537, 0])
^  Redo: (259) [user] subst_vars([1537, 0], _218700, [], _203762)
^  Unify: (259) [user] subst_vars([1537, 0], [_234570|_234572], [], _203762)
^  Call: (260) [user] subst_vars(1537, _234570, [], _235510)
^  Unify: (260) [user] subst_vars(1537, 1537, [], [])
   Call: (261) [system] var(1537)
^  Redo: (260) [user] subst_vars(1537, _234570, [], _235510)
^  Unify: (260) [user] subst_vars(1537, _234570, [], _235510)
   Call: (261) [system] atom(1537)
^  Redo: (260) [user] subst_vars(1537, _234570, [], _235510)
^  Unify: (260) [user] subst_vars(1537, _234570, [], _235510)
   Call: (261) [system] compound(1537)
^  Redo: (260) [user] subst_vars(1537, _234570, [], _235510)
^  Unify: (260) [user] subst_vars(1537, 1537, [], [])
^  Exit: (260) [user] subst_vars(1537, 1537, [], [])
^  Call: (260) [user] subst_vars([0], _234572, [], _203762)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _234572, [], _203762)
^  Unify: (260) [user] subst_vars([0], [_250442|_250444], [], _203762)
^  Call: (261) [user] subst_vars(0, _250442, [], _251382)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _250442, [], _251382)
^  Unify: (261) [user] subst_vars(0, _250442, [], _251382)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _250442, [], _251382)
^  Unify: (261) [user] subst_vars(0, _250442, [], _251382)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _250442, [], _251382)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _250444, [], _203762)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _250444, [], _203762)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1537, 0], [1537, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         (: Arg2Type Type)", 1537, 0], [";;         (: Arg2Type Type)", 1537, 0], [], [])
   Call: (258) [system] compound_name_arguments(_203760, '$COMMENT', [";;         (: Arg2Type Type)", 1537, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT', [";;         (: Arg2Type Type)", 1537, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), [], [])
   Call: (257) [system] _273800=metta_file_buffer(+, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: Arg2Type Type)", 1537, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1538, 0, 55307, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$stream_position'(55307, 1538, 0, 55341)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _326522))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _326522))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _326522)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _326522)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _326522)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _326522)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _332134))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _332134))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _332134))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _332134))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _332134)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _332134)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _337720))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _337720))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _337720)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _337720)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _337720)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _337720)
   Call: (270) [system] var('$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _337720)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$VAR'(_345180))
   Call: (270) [system] atom('$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _337720)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _337720)
   Call: (270) [system] '$COMMENT'(";;         (: ReturnType Type)", 1538, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _337720)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _337720)
   Call: (270) [system] '$COMMENT'(";;         (: ReturnType Type)", 1538, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _337720)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _337720)
   Call: (270) [system] '$COMMENT'(";;         (: ReturnType Type)", 1538, 0)==[_354460, _354466]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _337720)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _337720)
   Call: (270) [system] is_list('$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _337720)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _337720)
   Call: (270) [system] string('$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _337720)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _337720)
   Call: (270) [system] compound('$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _364662, _364664)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT', [";;         (: ReturnType Type)", 1538, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         (: ReturnType Type)", 1538, 0], _368404)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (: ReturnType Type)", 1538, 0], _368404)
   Call: (271) [apply] apply:maplist_([";;         (: ReturnType Type)", 1538, 0], _368404, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         (: ReturnType Type)", 1538, 0], [_371222|_371224], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _371222)
^  Unify: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _371222)
   Call: (273) [system] var(";;         (: ReturnType Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _371222)
^  Unify: (272) [user] mfix_vars1(";;         (: ReturnType Type)", '$VAR'(_375868))
   Call: (273) [system] atom(";;         (: ReturnType Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _371222)
^  Unify: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _371222)
   Call: (273) [system] ";;         (: ReturnType Type)"==true
^  Redo: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _371222)
^  Unify: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _371222)
   Call: (273) [system] ";;         (: ReturnType Type)"==false
^  Redo: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _371222)
^  Unify: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _371222)
   Call: (273) [system] ";;         (: ReturnType Type)"==[_385148, _385154]
^  Redo: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _371222)
^  Unify: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _371222)
   Call: (273) [system] is_list(";;         (: ReturnType Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _371222)
^  Unify: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _371222)
   Call: (273) [system] string(";;         (: ReturnType Type)")
   Exit: (273) [system] string(";;         (: ReturnType Type)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _371222)
^  Unify: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _371222)
   Call: (273) [system] compound(";;         (: ReturnType Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _371222)
^  Unify: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _371222)
^  Call: (273) [user] symbol(";;         (: ReturnType Type)")
^  Unify: (273) [user] symbol(";;         (: ReturnType Type)")
   Call: (274) [system] atom(";;         (: ReturnType Type)")
   Fail: (274) [system] atom(";;         (: ReturnType Type)")
^  Fail: (273) [user] symbol(";;         (: ReturnType Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _371222)
   Call: (273) [system] ";;         (: ReturnType Type)"=_371222
   Exit: (273) [system] ";;         (: ReturnType Type)"=";;         (: ReturnType Type)"
^  Exit: (272) [user] mfix_vars1(";;         (: ReturnType Type)", ";;         (: ReturnType Type)")
   Call: (272) [apply] apply:maplist_([1538, 0], _371224, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1538, 0], [_409220|_409222], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1538, _409220)
^  Unify: (273) [user] mfix_vars1(1538, _409220)
   Call: (274) [system] var(1538)
^  Redo: (273) [user] mfix_vars1(1538, _409220)
^  Unify: (273) [user] mfix_vars1(1538, '$VAR'(_413866))
   Call: (274) [system] atom(1538)
^  Redo: (273) [user] mfix_vars1(1538, _409220)
^  Unify: (273) [user] mfix_vars1(1538, _409220)
   Call: (274) [system] 1538==true
^  Redo: (273) [user] mfix_vars1(1538, _409220)
^  Unify: (273) [user] mfix_vars1(1538, _409220)
   Call: (274) [system] 1538==false
^  Redo: (273) [user] mfix_vars1(1538, _409220)
^  Unify: (273) [user] mfix_vars1(1538, _409220)
   Call: (274) [system] 1538==[_423146, _423152]
^  Redo: (273) [user] mfix_vars1(1538, _409220)
^  Unify: (273) [user] mfix_vars1(1538, _409220)
   Call: (274) [system] is_list(1538)
^  Redo: (273) [user] mfix_vars1(1538, _409220)
^  Unify: (273) [user] mfix_vars1(1538, _409220)
   Call: (274) [system] string(1538)
^  Redo: (273) [user] mfix_vars1(1538, _409220)
^  Unify: (273) [user] mfix_vars1(1538, _409220)
   Call: (274) [system] compound(1538)
^  Redo: (273) [user] mfix_vars1(1538, _409220)
^  Unify: (273) [user] mfix_vars1(1538, _409220)
^  Call: (274) [user] symbol(1538)
^  Unify: (274) [user] symbol(1538)
   Call: (275) [system] atom(1538)
   Fail: (275) [system] atom(1538)
^  Fail: (274) [user] symbol(1538)
^  Redo: (273) [user] mfix_vars1(1538, _409220)
   Call: (274) [system] 1538=_409220
   Exit: (274) [system] 1538=1538
^  Exit: (273) [user] mfix_vars1(1538, 1538)
   Call: (273) [apply] apply:maplist_([0], _409222, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_443546|_443548], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _443546)
^  Unify: (274) [user] mfix_vars1(0, _443546)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _443546)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_448192))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _443546)
^  Unify: (274) [user] mfix_vars1(0, _443546)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _443546)
^  Unify: (274) [user] mfix_vars1(0, _443546)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _443546)
^  Unify: (274) [user] mfix_vars1(0, _443546)
   Call: (275) [system] 0==[_457472, _457478]
^  Redo: (274) [user] mfix_vars1(0, _443546)
^  Unify: (274) [user] mfix_vars1(0, _443546)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _443546)
^  Unify: (274) [user] mfix_vars1(0, _443546)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _443546)
^  Unify: (274) [user] mfix_vars1(0, _443546)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _443546)
^  Unify: (274) [user] mfix_vars1(0, _443546)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _443546)
   Call: (275) [system] 0=_443546
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _443548, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1538, 0], [1538, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         (: ReturnType Type)", 1538, 0], [";;         (: ReturnType Type)", 1538, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (: ReturnType Type)", 1538, 0], [";;         (: ReturnType Type)", 1538, 0])
   Call: (270) [system] compound_name_arguments(_337720, '$COMMENT', [";;         (: ReturnType Type)", 1538, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT', [";;         (: ReturnType Type)", 1538, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: ReturnType Type)", 1538, 0)\=@='$COMMENT'(";;         (: ReturnType Type)", 1538, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _332134)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _493720))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _493720))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _493720))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _493720))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _493720)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _493720)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _499306))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _499306))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _499306)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _499306)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _499306)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: ReturnType Type)", 1538, 0)\=@='$COMMENT'(";;         (: ReturnType Type)", 1538, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _493720)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _326522))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _326522))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _326522))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _326522))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _326522)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _326522)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _521626))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _521626))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _5986)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _5986)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _5986)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: ReturnType Type)", 1538, 0)\=@='$COMMENT'(";;         (: ReturnType Type)", 1538, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0)))
   Call: (261) [system] '$COMMENT'(";;         (: ReturnType Type)", 1538, 0)\=@='$COMMENT'(";;         (: ReturnType Type)", 1538, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _32496, [], _32498)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _32496, [], _32498)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _32496, [], _32498)
   Call: (258) [system] atom('$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _32496, [], _32498)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _32496, [], _32498)
   Call: (258) [system] compound('$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         (: ReturnType Type)", 1538, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), _41812, _41814)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT', [";;         (: ReturnType Type)", 1538, 0])
^  Call: (258) [user] subst_vars([";;         (: ReturnType Type)", 1538, 0], _43698, [], _32498)
^  Unify: (258) [user] subst_vars([";;         (: ReturnType Type)", 1538, 0], [";;         (: ReturnType Type)", 1538, 0], [], [])
   Call: (259) [system] var([";;         (: ReturnType Type)", 1538, 0])
^  Redo: (258) [user] subst_vars([";;         (: ReturnType Type)", 1538, 0], _43698, [], _32498)
^  Unify: (258) [user] subst_vars([";;         (: ReturnType Type)", 1538, 0], [_47434|_47436], [], _32498)
^  Call: (259) [user] subst_vars(";;         (: ReturnType Type)", _47434, [], _48374)
^  Unify: (259) [user] subst_vars(";;         (: ReturnType Type)", ";;         (: ReturnType Type)", [], [])
   Call: (260) [system] var(";;         (: ReturnType Type)")
^  Redo: (259) [user] subst_vars(";;         (: ReturnType Type)", _47434, [], _48374)
^  Unify: (259) [user] subst_vars(";;         (: ReturnType Type)", _47434, [], _48374)
   Call: (260) [system] atom(";;         (: ReturnType Type)")
^  Redo: (259) [user] subst_vars(";;         (: ReturnType Type)", _47434, [], _48374)
^  Unify: (259) [user] subst_vars(";;         (: ReturnType Type)", _47434, [], _48374)
   Call: (260) [system] compound(";;         (: ReturnType Type)")
^  Redo: (259) [user] subst_vars(";;         (: ReturnType Type)", _47434, [], _48374)
^  Unify: (259) [user] subst_vars(";;         (: ReturnType Type)", ";;         (: ReturnType Type)", [], [])
^  Exit: (259) [user] subst_vars(";;         (: ReturnType Type)", ";;         (: ReturnType Type)", [], [])
^  Call: (259) [user] subst_vars([1538, 0], _47436, [], _32498)
^  Unify: (259) [user] subst_vars([1538, 0], [1538, 0], [], [])
   Call: (260) [system] var([1538, 0])
^  Redo: (259) [user] subst_vars([1538, 0], _47436, [], _32498)
^  Unify: (259) [user] subst_vars([1538, 0], [_63306|_63308], [], _32498)
^  Call: (260) [user] subst_vars(1538, _63306, [], _64246)
^  Unify: (260) [user] subst_vars(1538, 1538, [], [])
   Call: (261) [system] var(1538)
^  Redo: (260) [user] subst_vars(1538, _63306, [], _64246)
^  Unify: (260) [user] subst_vars(1538, _63306, [], _64246)
   Call: (261) [system] atom(1538)
^  Redo: (260) [user] subst_vars(1538, _63306, [], _64246)
^  Unify: (260) [user] subst_vars(1538, _63306, [], _64246)
   Call: (261) [system] compound(1538)
^  Redo: (260) [user] subst_vars(1538, _63306, [], _64246)
^  Unify: (260) [user] subst_vars(1538, 1538, [], [])
^  Exit: (260) [user] subst_vars(1538, 1538, [], [])
^  Call: (260) [user] subst_vars([0], _63308, [], _32498)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _63308, [], _32498)
^  Unify: (260) [user] subst_vars([0], [_79178|_79180], [], _32498)
^  Call: (261) [user] subst_vars(0, _79178, [], _80118)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _79178, [], _80118)
^  Unify: (261) [user] subst_vars(0, _79178, [], _80118)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _79178, [], _80118)
^  Unify: (261) [user] subst_vars(0, _79178, [], _80118)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _79178, [], _80118)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _79180, [], _32498)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _79180, [], _32498)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1538, 0], [1538, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         (: ReturnType Type)", 1538, 0], [";;         (: ReturnType Type)", 1538, 0], [], [])
   Call: (258) [system] compound_name_arguments(_32496, '$COMMENT', [";;         (: ReturnType Type)", 1538, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT', [";;         (: ReturnType Type)", 1538, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         (: ReturnType Type)", 1538, 0), '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), [], [])
   Call: (257) [system] _102536=metta_file_buffer(+, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: ReturnType Type)", 1538, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1539, 0, 55338, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$stream_position'(55338, 1539, 0, 55372)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _155266))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _155266))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _155266)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _155266)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _155266)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _155266)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _160878))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _160878))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _160878))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _160878))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _160878)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _160878)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _166464))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _166464))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _166464)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _166464)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _166464)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _166464)
   Call: (270) [system] var('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _166464)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$VAR'(_173924))
   Call: (270) [system] atom('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _166464)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _166464)
   Call: (270) [system] '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _166464)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _166464)
   Call: (270) [system] '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _166464)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _166464)
   Call: (270) [system] '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0)==[_183204, _183210]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _166464)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _166464)
   Call: (270) [system] is_list('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _166464)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _166464)
   Call: (270) [system] string('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _166464)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _166464)
   Call: (270) [system] compound('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _193406, _193408)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT', [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0], _197148)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0], _197148)
   Call: (271) [apply] apply:maplist_([";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0], _197148, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0], [_199966|_199968], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _199966)
^  Unify: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _199966)
   Call: (273) [system] var(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
^  Redo: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _199966)
^  Unify: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", '$VAR'(_204612))
   Call: (273) [system] atom(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
^  Redo: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _199966)
^  Unify: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _199966)
   Call: (273) [system] ";;         (: some-func (-> Arg1Type Arg2Type ReturnType))"==true
^  Redo: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _199966)
^  Unify: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _199966)
   Call: (273) [system] ";;         (: some-func (-> Arg1Type Arg2Type ReturnType))"==false
^  Redo: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _199966)
^  Unify: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _199966)
   Call: (273) [system] ";;         (: some-func (-> Arg1Type Arg2Type ReturnType))"==[_213892, _213898]
^  Redo: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _199966)
^  Unify: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _199966)
   Call: (273) [system] is_list(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
^  Redo: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _199966)
^  Unify: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _199966)
   Call: (273) [system] string(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
   Exit: (273) [system] string(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _199966)
^  Unify: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _199966)
   Call: (273) [system] compound(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
^  Redo: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _199966)
^  Unify: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _199966)
^  Call: (273) [user] symbol(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
^  Unify: (273) [user] symbol(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
   Call: (274) [system] atom(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
   Fail: (274) [system] atom(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
^  Fail: (273) [user] symbol(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
^  Redo: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _199966)
   Call: (273) [system] ";;         (: some-func (-> Arg1Type Arg2Type ReturnType))"=_199966
   Exit: (273) [system] ";;         (: some-func (-> Arg1Type Arg2Type ReturnType))"=";;         (: some-func (-> Arg1Type Arg2Type ReturnType))"
^  Exit: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", ";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
   Call: (272) [apply] apply:maplist_([1539, 0], _199968, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1539, 0], [_237964|_237966], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1539, _237964)
^  Unify: (273) [user] mfix_vars1(1539, _237964)
   Call: (274) [system] var(1539)
^  Redo: (273) [user] mfix_vars1(1539, _237964)
^  Unify: (273) [user] mfix_vars1(1539, '$VAR'(_242610))
   Call: (274) [system] atom(1539)
^  Redo: (273) [user] mfix_vars1(1539, _237964)
^  Unify: (273) [user] mfix_vars1(1539, _237964)
   Call: (274) [system] 1539==true
^  Redo: (273) [user] mfix_vars1(1539, _237964)
^  Unify: (273) [user] mfix_vars1(1539, _237964)
   Call: (274) [system] 1539==false
^  Redo: (273) [user] mfix_vars1(1539, _237964)
^  Unify: (273) [user] mfix_vars1(1539, _237964)
   Call: (274) [system] 1539==[_251890, _251896]
^  Redo: (273) [user] mfix_vars1(1539, _237964)
^  Unify: (273) [user] mfix_vars1(1539, _237964)
   Call: (274) [system] is_list(1539)
^  Redo: (273) [user] mfix_vars1(1539, _237964)
^  Unify: (273) [user] mfix_vars1(1539, _237964)
   Call: (274) [system] string(1539)
^  Redo: (273) [user] mfix_vars1(1539, _237964)
^  Unify: (273) [user] mfix_vars1(1539, _237964)
   Call: (274) [system] compound(1539)
^  Redo: (273) [user] mfix_vars1(1539, _237964)
^  Unify: (273) [user] mfix_vars1(1539, _237964)
^  Call: (274) [user] symbol(1539)
^  Unify: (274) [user] symbol(1539)
   Call: (275) [system] atom(1539)
   Fail: (275) [system] atom(1539)
^  Fail: (274) [user] symbol(1539)
^  Redo: (273) [user] mfix_vars1(1539, _237964)
   Call: (274) [system] 1539=_237964
   Exit: (274) [system] 1539=1539
^  Exit: (273) [user] mfix_vars1(1539, 1539)
   Call: (273) [apply] apply:maplist_([0], _237966, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_272290|_272292], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _272290)
^  Unify: (274) [user] mfix_vars1(0, _272290)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _272290)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_276936))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _272290)
^  Unify: (274) [user] mfix_vars1(0, _272290)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _272290)
^  Unify: (274) [user] mfix_vars1(0, _272290)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _272290)
^  Unify: (274) [user] mfix_vars1(0, _272290)
   Call: (275) [system] 0==[_286216, _286222]
^  Redo: (274) [user] mfix_vars1(0, _272290)
^  Unify: (274) [user] mfix_vars1(0, _272290)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _272290)
^  Unify: (274) [user] mfix_vars1(0, _272290)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _272290)
^  Unify: (274) [user] mfix_vars1(0, _272290)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _272290)
^  Unify: (274) [user] mfix_vars1(0, _272290)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _272290)
   Call: (275) [system] 0=_272290
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _272292, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1539, 0], [1539, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0], [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0], [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0])
   Call: (270) [system] compound_name_arguments(_166464, '$COMMENT', [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT', [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0)\=@='$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _160878)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _322464))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _322464))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _322464))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _322464))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _322464)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _322464)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _328050))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _328050))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _328050)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _328050)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _328050)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0)\=@='$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _322464)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _155266))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _155266))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _155266))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _155266))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _155266)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _155266)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _350370))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _350370))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _350370)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _350370)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _350370)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0)\=@='$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _155266)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0)))
   Call: (261) [system] '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0)\=@='$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _379148, [], _379150)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _379148, [], _379150)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _379148, [], _379150)
   Call: (258) [system] atom('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _379148, [], _379150)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _379148, [], _379150)
   Call: (258) [system] compound('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), _388464, _388466)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT', [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0])
^  Call: (258) [user] subst_vars([";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0], _390350, [], _379150)
^  Unify: (258) [user] subst_vars([";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0], [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0], [], [])
   Call: (259) [system] var([";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0])
^  Redo: (258) [user] subst_vars([";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0], _390350, [], _379150)
^  Unify: (258) [user] subst_vars([";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0], [_394086|_394088], [], _379150)
^  Call: (259) [user] subst_vars(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _394086, [], _395026)
^  Unify: (259) [user] subst_vars(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", ";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", [], [])
   Call: (260) [system] var(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
^  Redo: (259) [user] subst_vars(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _394086, [], _395026)
^  Unify: (259) [user] subst_vars(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _394086, [], _395026)
   Call: (260) [system] atom(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
^  Redo: (259) [user] subst_vars(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _394086, [], _395026)
^  Unify: (259) [user] subst_vars(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _394086, [], _395026)
   Call: (260) [system] compound(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
^  Redo: (259) [user] subst_vars(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _394086, [], _395026)
^  Unify: (259) [user] subst_vars(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", ";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", [], [])
^  Exit: (259) [user] subst_vars(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", ";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", [], [])
^  Call: (259) [user] subst_vars([1539, 0], _394088, [], _379150)
^  Unify: (259) [user] subst_vars([1539, 0], [1539, 0], [], [])
   Call: (260) [system] var([1539, 0])
^  Redo: (259) [user] subst_vars([1539, 0], _394088, [], _379150)
^  Unify: (259) [user] subst_vars([1539, 0], [_409958|_409960], [], _379150)
^  Call: (260) [user] subst_vars(1539, _409958, [], _410898)
^  Unify: (260) [user] subst_vars(1539, 1539, [], [])
   Call: (261) [system] var(1539)
^  Redo: (260) [user] subst_vars(1539, _409958, [], _410898)
^  Unify: (260) [user] subst_vars(1539, _409958, [], _410898)
   Call: (261) [system] atom(1539)
^  Redo: (260) [user] subst_vars(1539, _409958, [], _410898)
^  Unify: (260) [user] subst_vars(1539, _409958, [], _410898)
   Call: (261) [system] compound(1539)
^  Redo: (260) [user] subst_vars(1539, _409958, [], _410898)
^  Unify: (260) [user] subst_vars(1539, 1539, [], [])
^  Exit: (260) [user] subst_vars(1539, 1539, [], [])
^  Call: (260) [user] subst_vars([0], _409960, [], _379150)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _409960, [], _379150)
^  Unify: (260) [user] subst_vars([0], [_425830|_425832], [], _379150)
^  Call: (261) [user] subst_vars(0, _425830, [], _426770)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _425830, [], _426770)
^  Unify: (261) [user] subst_vars(0, _425830, [], _426770)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _425830, [], _426770)
^  Unify: (261) [user] subst_vars(0, _425830, [], _426770)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _425830, [], _426770)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _425832, [], _379150)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _425832, [], _379150)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1539, 0], [1539, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0], [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0], [], [])
   Call: (258) [system] compound_name_arguments(_379148, '$COMMENT', [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT', [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), [], [])
   Call: (257) [system] _449188=metta_file_buffer(+, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1539, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1540, 0, 55397, '$COMMENT'(";;         (@doc some-func", 1540, 0), '$stream_position'(55397, 1540, 0, 55431)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc some-func", 1540, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc some-func", 1540, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         (@doc some-func", 1540, 0), _501910))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (@doc some-func", 1540, 0), _501910))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         (@doc some-func", 1540, 0), _501910)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (@doc some-func", 1540, 0), _501910)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         (@doc some-func", 1540, 0), _501910)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         (@doc some-func", 1540, 0), _501910)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1540, 0), _507522))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1540, 0), _507522))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1540, 0), _507522))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1540, 0), _507522))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1540, 0), _507522)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1540, 0), _507522)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1540, 0), _513108))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1540, 0), _513108))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1540, 0), _513108)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1540, 0), _513108)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1540, 0), _513108)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1540, 0), _513108)
   Call: (270) [system] var('$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1540, 0), _513108)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1540, 0), '$VAR'(_520568))
   Call: (270) [system] atom('$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1540, 0), _513108)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1540, 0), _5982)
   Call: (270) [system] '$COMMENT'(";;         (@doc some-func", 1540, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1540, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1540, 0), _5982)
   Call: (270) [system] '$COMMENT'(";;         (@doc some-func", 1540, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1540, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1540, 0), _5982)
   Call: (270) [system] '$COMMENT'(";;         (@doc some-func", 1540, 0)==[_11918, _11924]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1540, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1540, 0), _5982)
   Call: (270) [system] is_list('$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1540, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1540, 0), _5982)
   Call: (270) [system] string('$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1540, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1540, 0), _5982)
   Call: (270) [system] compound('$COMMENT'(";;         (@doc some-func", 1540, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         (@doc some-func", 1540, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-func", 1540, 0), _22120, _22122)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT', [";;         (@doc some-func", 1540, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         (@doc some-func", 1540, 0], _25862)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (@doc some-func", 1540, 0], _25862)
   Call: (271) [apply] apply:maplist_([";;         (@doc some-func", 1540, 0], _25862, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         (@doc some-func", 1540, 0], [_28680|_28682], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         (@doc some-func", _28680)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func", _28680)
   Call: (273) [system] var(";;         (@doc some-func")
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func", _28680)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func", '$VAR'(_33326))
   Call: (273) [system] atom(";;         (@doc some-func")
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func", _28680)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func", _28680)
   Call: (273) [system] ";;         (@doc some-func"==true
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func", _28680)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func", _28680)
   Call: (273) [system] ";;         (@doc some-func"==false
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func", _28680)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func", _28680)
   Call: (273) [system] ";;         (@doc some-func"==[_42606, _42612]
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func", _28680)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func", _28680)
   Call: (273) [system] is_list(";;         (@doc some-func")
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func", _28680)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func", _28680)
   Call: (273) [system] string(";;         (@doc some-func")
   Exit: (273) [system] string(";;         (@doc some-func")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func", _28680)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func", _28680)
   Call: (273) [system] compound(";;         (@doc some-func")
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func", _28680)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func", _28680)
^  Call: (273) [user] symbol(";;         (@doc some-func")
^  Unify: (273) [user] symbol(";;         (@doc some-func")
   Call: (274) [system] atom(";;         (@doc some-func")
   Fail: (274) [system] atom(";;         (@doc some-func")
^  Fail: (273) [user] symbol(";;         (@doc some-func")
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func", _28680)
   Call: (273) [system] ";;         (@doc some-func"=_28680
   Exit: (273) [system] ";;         (@doc some-func"=";;         (@doc some-func"
^  Exit: (272) [user] mfix_vars1(";;         (@doc some-func", ";;         (@doc some-func")
   Call: (272) [apply] apply:maplist_([1540, 0], _28682, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1540, 0], [_66678|_66680], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1540, _66678)
^  Unify: (273) [user] mfix_vars1(1540, _66678)
   Call: (274) [system] var(1540)
^  Redo: (273) [user] mfix_vars1(1540, _66678)
^  Unify: (273) [user] mfix_vars1(1540, '$VAR'(_71324))
   Call: (274) [system] atom(1540)
^  Redo: (273) [user] mfix_vars1(1540, _66678)
^  Unify: (273) [user] mfix_vars1(1540, _66678)
   Call: (274) [system] 1540==true
^  Redo: (273) [user] mfix_vars1(1540, _66678)
^  Unify: (273) [user] mfix_vars1(1540, _66678)
   Call: (274) [system] 1540==false
^  Redo: (273) [user] mfix_vars1(1540, _66678)
^  Unify: (273) [user] mfix_vars1(1540, _66678)
   Call: (274) [system] 1540==[_80604, _80610]
^  Redo: (273) [user] mfix_vars1(1540, _66678)
^  Unify: (273) [user] mfix_vars1(1540, _66678)
   Call: (274) [system] is_list(1540)
^  Redo: (273) [user] mfix_vars1(1540, _66678)
^  Unify: (273) [user] mfix_vars1(1540, _66678)
   Call: (274) [system] string(1540)
^  Redo: (273) [user] mfix_vars1(1540, _66678)
^  Unify: (273) [user] mfix_vars1(1540, _66678)
   Call: (274) [system] compound(1540)
^  Redo: (273) [user] mfix_vars1(1540, _66678)
^  Unify: (273) [user] mfix_vars1(1540, _66678)
^  Call: (274) [user] symbol(1540)
^  Unify: (274) [user] symbol(1540)
   Call: (275) [system] atom(1540)
   Fail: (275) [system] atom(1540)
^  Fail: (274) [user] symbol(1540)
^  Redo: (273) [user] mfix_vars1(1540, _66678)
   Call: (274) [system] 1540=_66678
   Exit: (274) [system] 1540=1540
^  Exit: (273) [user] mfix_vars1(1540, 1540)
   Call: (273) [apply] apply:maplist_([0], _66680, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_101004|_101006], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _101004)
^  Unify: (274) [user] mfix_vars1(0, _101004)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _101004)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_105650))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _101004)
^  Unify: (274) [user] mfix_vars1(0, _101004)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _101004)
^  Unify: (274) [user] mfix_vars1(0, _101004)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _101004)
^  Unify: (274) [user] mfix_vars1(0, _101004)
   Call: (275) [system] 0==[_114930, _114936]
^  Redo: (274) [user] mfix_vars1(0, _101004)
^  Unify: (274) [user] mfix_vars1(0, _101004)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _101004)
^  Unify: (274) [user] mfix_vars1(0, _101004)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _101004)
^  Unify: (274) [user] mfix_vars1(0, _101004)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _101004)
^  Unify: (274) [user] mfix_vars1(0, _101004)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _101004)
   Call: (275) [system] 0=_101004
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _101006, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1540, 0], [1540, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         (@doc some-func", 1540, 0], [";;         (@doc some-func", 1540, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (@doc some-func", 1540, 0], [";;         (@doc some-func", 1540, 0])
   Call: (270) [system] compound_name_arguments(_5982, '$COMMENT', [";;         (@doc some-func", 1540, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT', [";;         (@doc some-func", 1540, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0)))
   Call: (267) [system] '$COMMENT'(";;         (@doc some-func", 1540, 0)\=@='$COMMENT'(";;         (@doc some-func", 1540, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1540, 0), _5968)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1540, 0), _151178))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1540, 0), _151178))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1540, 0), _151178))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1540, 0), _151178))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1540, 0), _151178)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1540, 0), _151178)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1540, 0), _156764))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1540, 0), _156764))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1540, 0), _156764)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (@doc some-func", 1540, 0), _156764)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         (@doc some-func", 1540, 0), _156764)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0)))
   Call: (267) [system] '$COMMENT'(";;         (@doc some-func", 1540, 0)\=@='$COMMENT'(";;         (@doc some-func", 1540, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1540, 0), _151178)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1540, 0), _5948))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1540, 0), _5948))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1540, 0), _5948))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1540, 0), _5948))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1540, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1540, 0), _5948)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1540, 0), _179084))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1540, 0), _179084))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1540, 0), _179084)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (@doc some-func", 1540, 0), _179084)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         (@doc some-func", 1540, 0), _179084)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0)))
   Call: (267) [system] '$COMMENT'(";;         (@doc some-func", 1540, 0)\=@='$COMMENT'(";;         (@doc some-func", 1540, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1540, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0)))
   Call: (261) [system] '$COMMENT'(";;         (@doc some-func", 1540, 0)\=@='$COMMENT'(";;         (@doc some-func", 1540, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc some-func", 1540, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-func", 1540, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-func", 1540, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-func", 1540, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-func", 1540, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-func", 1540, 0), _207862, [], _207864)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-func", 1540, 0), _207862, [], _207864)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-func", 1540, 0), _207862, [], _207864)
   Call: (258) [system] atom('$COMMENT'(";;         (@doc some-func", 1540, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-func", 1540, 0), _207862, [], _207864)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-func", 1540, 0), _207862, [], _207864)
   Call: (258) [system] compound('$COMMENT'(";;         (@doc some-func", 1540, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         (@doc some-func", 1540, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-func", 1540, 0), _217178, _217180)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT', [";;         (@doc some-func", 1540, 0])
^  Call: (258) [user] subst_vars([";;         (@doc some-func", 1540, 0], _219064, [], _207864)
^  Unify: (258) [user] subst_vars([";;         (@doc some-func", 1540, 0], [";;         (@doc some-func", 1540, 0], [], [])
   Call: (259) [system] var([";;         (@doc some-func", 1540, 0])
^  Redo: (258) [user] subst_vars([";;         (@doc some-func", 1540, 0], _219064, [], _207864)
^  Unify: (258) [user] subst_vars([";;         (@doc some-func", 1540, 0], [_222800|_222802], [], _207864)
^  Call: (259) [user] subst_vars(";;         (@doc some-func", _222800, [], _223740)
^  Unify: (259) [user] subst_vars(";;         (@doc some-func", ";;         (@doc some-func", [], [])
   Call: (260) [system] var(";;         (@doc some-func")
^  Redo: (259) [user] subst_vars(";;         (@doc some-func", _222800, [], _223740)
^  Unify: (259) [user] subst_vars(";;         (@doc some-func", _222800, [], _223740)
   Call: (260) [system] atom(";;         (@doc some-func")
^  Redo: (259) [user] subst_vars(";;         (@doc some-func", _222800, [], _223740)
^  Unify: (259) [user] subst_vars(";;         (@doc some-func", _222800, [], _223740)
   Call: (260) [system] compound(";;         (@doc some-func")
^  Redo: (259) [user] subst_vars(";;         (@doc some-func", _222800, [], _223740)
^  Unify: (259) [user] subst_vars(";;         (@doc some-func", ";;         (@doc some-func", [], [])
^  Exit: (259) [user] subst_vars(";;         (@doc some-func", ";;         (@doc some-func", [], [])
^  Call: (259) [user] subst_vars([1540, 0], _222802, [], _207864)
^  Unify: (259) [user] subst_vars([1540, 0], [1540, 0], [], [])
   Call: (260) [system] var([1540, 0])
^  Redo: (259) [user] subst_vars([1540, 0], _222802, [], _207864)
^  Unify: (259) [user] subst_vars([1540, 0], [_238672|_238674], [], _207864)
^  Call: (260) [user] subst_vars(1540, _238672, [], _239612)
^  Unify: (260) [user] subst_vars(1540, 1540, [], [])
   Call: (261) [system] var(1540)
^  Redo: (260) [user] subst_vars(1540, _238672, [], _239612)
^  Unify: (260) [user] subst_vars(1540, _238672, [], _239612)
   Call: (261) [system] atom(1540)
^  Redo: (260) [user] subst_vars(1540, _238672, [], _239612)
^  Unify: (260) [user] subst_vars(1540, _238672, [], _239612)
   Call: (261) [system] compound(1540)
^  Redo: (260) [user] subst_vars(1540, _238672, [], _239612)
^  Unify: (260) [user] subst_vars(1540, 1540, [], [])
^  Exit: (260) [user] subst_vars(1540, 1540, [], [])
^  Call: (260) [user] subst_vars([0], _238674, [], _207864)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _238674, [], _207864)
^  Unify: (260) [user] subst_vars([0], [_254544|_254546], [], _207864)
^  Call: (261) [user] subst_vars(0, _254544, [], _255484)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _254544, [], _255484)
^  Unify: (261) [user] subst_vars(0, _254544, [], _255484)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _254544, [], _255484)
^  Unify: (261) [user] subst_vars(0, _254544, [], _255484)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _254544, [], _255484)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _254546, [], _207864)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _254546, [], _207864)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1540, 0], [1540, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         (@doc some-func", 1540, 0], [";;         (@doc some-func", 1540, 0], [], [])
   Call: (258) [system] compound_name_arguments(_207862, '$COMMENT', [";;         (@doc some-func", 1540, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT', [";;         (@doc some-func", 1540, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-func", 1540, 0), '$COMMENT'(";;         (@doc some-func", 1540, 0), [], [])
   Call: (257) [system] _277902=metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func", 1540, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func", 1540, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func", 1540, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func", 1540, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func", 1540, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func", 1540, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func", 1540, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func", 1540, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func", 1540, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1541, 0, 55424, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$stream_position'(55424, 1541, 0, 55458)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _330626))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _330626))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _330626)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _330626)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _330626)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _330626)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _336238))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _336238))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _336238))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _336238))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _336238)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _336238)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _341824))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _341824))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _341824)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _341824)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _341824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _341824)
   Call: (270) [system] var('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _341824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$VAR'(_349284))
   Call: (270) [system] atom('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _341824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _341824)
   Call: (270) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _341824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _341824)
   Call: (270) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _341824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _341824)
   Call: (270) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0)==[_358564, _358570]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _341824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _341824)
   Call: (270) [system] is_list('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _341824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _341824)
   Call: (270) [system] string('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _341824)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _341824)
   Call: (270) [system] compound('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
   Exit: (270) [system] compound('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _368766, _368768)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT', [";;           (@desc \"Test function\")", 1541, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;           (@desc \"Test function\")", 1541, 0], _372508)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@desc \"Test function\")", 1541, 0], _372508)
   Call: (271) [apply] apply:maplist_([";;           (@desc \"Test function\")", 1541, 0], _372508, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;           (@desc \"Test function\")", 1541, 0], [_375326|_375328], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _375326)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _375326)
   Call: (273) [system] var(";;           (@desc \"Test function\")")
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _375326)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", '$VAR'(_379972))
   Call: (273) [system] atom(";;           (@desc \"Test function\")")
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _375326)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _375326)
   Call: (273) [system] ";;           (@desc \"Test function\")"==true
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _375326)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _375326)
   Call: (273) [system] ";;           (@desc \"Test function\")"==false
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _375326)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _375326)
   Call: (273) [system] ";;           (@desc \"Test function\")"==[_389252, _389258]
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _375326)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _375326)
   Call: (273) [system] is_list(";;           (@desc \"Test function\")")
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _375326)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _375326)
   Call: (273) [system] string(";;           (@desc \"Test function\")")
   Exit: (273) [system] string(";;           (@desc \"Test function\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _375326)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _375326)
   Call: (273) [system] compound(";;           (@desc \"Test function\")")
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _375326)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _375326)
^  Call: (273) [user] symbol(";;           (@desc \"Test function\")")
^  Unify: (273) [user] symbol(";;           (@desc \"Test function\")")
   Call: (274) [system] atom(";;           (@desc \"Test function\")")
   Fail: (274) [system] atom(";;           (@desc \"Test function\")")
^  Fail: (273) [user] symbol(";;           (@desc \"Test function\")")
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _375326)
   Call: (273) [system] ";;           (@desc \"Test function\")"=_375326
   Exit: (273) [system] ";;           (@desc \"Test function\")"=";;           (@desc \"Test function\")"
^  Exit: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", ";;           (@desc \"Test function\")")
   Call: (272) [apply] apply:maplist_([1541, 0], _375328, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1541, 0], [_413324|_413326], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1541, _413324)
^  Unify: (273) [user] mfix_vars1(1541, _413324)
   Call: (274) [system] var(1541)
^  Redo: (273) [user] mfix_vars1(1541, _413324)
^  Unify: (273) [user] mfix_vars1(1541, '$VAR'(_417970))
   Call: (274) [system] atom(1541)
^  Redo: (273) [user] mfix_vars1(1541, _413324)
^  Unify: (273) [user] mfix_vars1(1541, _413324)
   Call: (274) [system] 1541==true
^  Redo: (273) [user] mfix_vars1(1541, _413324)
^  Unify: (273) [user] mfix_vars1(1541, _413324)
   Call: (274) [system] 1541==false
^  Redo: (273) [user] mfix_vars1(1541, _413324)
^  Unify: (273) [user] mfix_vars1(1541, _413324)
   Call: (274) [system] 1541==[_427250, _427256]
^  Redo: (273) [user] mfix_vars1(1541, _413324)
^  Unify: (273) [user] mfix_vars1(1541, _413324)
   Call: (274) [system] is_list(1541)
^  Redo: (273) [user] mfix_vars1(1541, _413324)
^  Unify: (273) [user] mfix_vars1(1541, _413324)
   Call: (274) [system] string(1541)
^  Redo: (273) [user] mfix_vars1(1541, _413324)
^  Unify: (273) [user] mfix_vars1(1541, _413324)
   Call: (274) [system] compound(1541)
^  Redo: (273) [user] mfix_vars1(1541, _413324)
^  Unify: (273) [user] mfix_vars1(1541, _413324)
^  Call: (274) [user] symbol(1541)
^  Unify: (274) [user] symbol(1541)
   Call: (275) [system] atom(1541)
   Fail: (275) [system] atom(1541)
^  Fail: (274) [user] symbol(1541)
^  Redo: (273) [user] mfix_vars1(1541, _413324)
   Call: (274) [system] 1541=_413324
   Exit: (274) [system] 1541=1541
^  Exit: (273) [user] mfix_vars1(1541, 1541)
   Call: (273) [apply] apply:maplist_([0], _413326, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_447650|_447652], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _447650)
^  Unify: (274) [user] mfix_vars1(0, _447650)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _447650)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_452296))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _447650)
^  Unify: (274) [user] mfix_vars1(0, _447650)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _447650)
^  Unify: (274) [user] mfix_vars1(0, _447650)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _447650)
^  Unify: (274) [user] mfix_vars1(0, _447650)
   Call: (275) [system] 0==[_461576, _461582]
^  Redo: (274) [user] mfix_vars1(0, _447650)
^  Unify: (274) [user] mfix_vars1(0, _447650)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _447650)
^  Unify: (274) [user] mfix_vars1(0, _447650)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _447650)
^  Unify: (274) [user] mfix_vars1(0, _447650)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _447650)
^  Unify: (274) [user] mfix_vars1(0, _447650)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _447650)
   Call: (275) [system] 0=_447650
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _447652, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1541, 0], [1541, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;           (@desc \"Test function\")", 1541, 0], [";;           (@desc \"Test function\")", 1541, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@desc \"Test function\")", 1541, 0], [";;           (@desc \"Test function\")", 1541, 0])
   Call: (270) [system] compound_name_arguments(_341824, '$COMMENT', [";;           (@desc \"Test function\")", 1541, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT', [";;           (@desc \"Test function\")", 1541, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0)\=@='$COMMENT'(";;           (@desc \"Test function\")", 1541, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _336238)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _497824))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _497824))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _497824))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _497824))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _497824)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _497824)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _503410))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _503410))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _503410)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _503410)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _503410)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0)\=@='$COMMENT'(";;           (@desc \"Test function\")", 1541, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _497824)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _330626))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _330626))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _330626))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _330626))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _7708))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _7708))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _7708)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _7708)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _7708)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0)\=@='$COMMENT'(";;           (@desc \"Test function\")", 1541, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0)))
   Call: (261) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0)\=@='$COMMENT'(";;           (@desc \"Test function\")", 1541, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _36486, [], _36488)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _36486, [], _36488)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _36486, [], _36488)
   Call: (258) [system] atom('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _36486, [], _36488)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _36486, [], _36488)
   Call: (258) [system] compound('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
   Exit: (258) [system] compound('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), _45802, _45804)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT', [";;           (@desc \"Test function\")", 1541, 0])
^  Call: (258) [user] subst_vars([";;           (@desc \"Test function\")", 1541, 0], _47688, [], _36488)
^  Unify: (258) [user] subst_vars([";;           (@desc \"Test function\")", 1541, 0], [";;           (@desc \"Test function\")", 1541, 0], [], [])
   Call: (259) [system] var([";;           (@desc \"Test function\")", 1541, 0])
^  Redo: (258) [user] subst_vars([";;           (@desc \"Test function\")", 1541, 0], _47688, [], _36488)
^  Unify: (258) [user] subst_vars([";;           (@desc \"Test function\")", 1541, 0], [_51424|_51426], [], _36488)
^  Call: (259) [user] subst_vars(";;           (@desc \"Test function\")", _51424, [], _52364)
^  Unify: (259) [user] subst_vars(";;           (@desc \"Test function\")", ";;           (@desc \"Test function\")", [], [])
   Call: (260) [system] var(";;           (@desc \"Test function\")")
^  Redo: (259) [user] subst_vars(";;           (@desc \"Test function\")", _51424, [], _52364)
^  Unify: (259) [user] subst_vars(";;           (@desc \"Test function\")", _51424, [], _52364)
   Call: (260) [system] atom(";;           (@desc \"Test function\")")
^  Redo: (259) [user] subst_vars(";;           (@desc \"Test function\")", _51424, [], _52364)
^  Unify: (259) [user] subst_vars(";;           (@desc \"Test function\")", _51424, [], _52364)
   Call: (260) [system] compound(";;           (@desc \"Test function\")")
^  Redo: (259) [user] subst_vars(";;           (@desc \"Test function\")", _51424, [], _52364)
^  Unify: (259) [user] subst_vars(";;           (@desc \"Test function\")", ";;           (@desc \"Test function\")", [], [])
^  Exit: (259) [user] subst_vars(";;           (@desc \"Test function\")", ";;           (@desc \"Test function\")", [], [])
^  Call: (259) [user] subst_vars([1541, 0], _51426, [], _36488)
^  Unify: (259) [user] subst_vars([1541, 0], [1541, 0], [], [])
   Call: (260) [system] var([1541, 0])
^  Redo: (259) [user] subst_vars([1541, 0], _51426, [], _36488)
^  Unify: (259) [user] subst_vars([1541, 0], [_67296|_67298], [], _36488)
^  Call: (260) [user] subst_vars(1541, _67296, [], _68236)
^  Unify: (260) [user] subst_vars(1541, 1541, [], [])
   Call: (261) [system] var(1541)
^  Redo: (260) [user] subst_vars(1541, _67296, [], _68236)
^  Unify: (260) [user] subst_vars(1541, _67296, [], _68236)
   Call: (261) [system] atom(1541)
^  Redo: (260) [user] subst_vars(1541, _67296, [], _68236)
^  Unify: (260) [user] subst_vars(1541, _67296, [], _68236)
   Call: (261) [system] compound(1541)
^  Redo: (260) [user] subst_vars(1541, _67296, [], _68236)
^  Unify: (260) [user] subst_vars(1541, 1541, [], [])
^  Exit: (260) [user] subst_vars(1541, 1541, [], [])
^  Call: (260) [user] subst_vars([0], _67298, [], _36488)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _67298, [], _36488)
^  Unify: (260) [user] subst_vars([0], [_83168|_83170], [], _36488)
^  Call: (261) [user] subst_vars(0, _83168, [], _84108)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _83168, [], _84108)
^  Unify: (261) [user] subst_vars(0, _83168, [], _84108)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _83168, [], _84108)
^  Unify: (261) [user] subst_vars(0, _83168, [], _84108)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _83168, [], _84108)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _83170, [], _36488)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _83170, [], _36488)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1541, 0], [1541, 0], [], [])
^  Exit: (258) [user] subst_vars([";;           (@desc \"Test function\")", 1541, 0], [";;           (@desc \"Test function\")", 1541, 0], [], [])
   Call: (258) [system] compound_name_arguments(_36486, '$COMMENT', [";;           (@desc \"Test function\")", 1541, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT', [";;           (@desc \"Test function\")", 1541, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), [], [])
   Call: (257) [system] _106526=metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1541, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1542, 0, 55461, '$COMMENT'(";;           (@params (", 1542, 0), '$stream_position'(55461, 1542, 0, 55495)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@params (", 1542, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@params (", 1542, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;           (@params (", 1542, 0), _159248))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@params (", 1542, 0), _159248))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;           (@params (", 1542, 0), _159248)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@params (", 1542, 0), _159248)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;           (@params (", 1542, 0), _159248)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;           (@params (", 1542, 0), _159248)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1542, 0), _164860))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1542, 0), _164860))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1542, 0), _164860))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1542, 0), _164860))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1542, 0), _164860)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1542, 0), _164860)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;           (@params (", 1542, 0), _170446))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@params (", 1542, 0), _170446))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;           (@params (", 1542, 0), _170446)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@params (", 1542, 0), _170446)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1542, 0), _170446)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1542, 0), _170446)
   Call: (270) [system] var('$COMMENT'(";;           (@params (", 1542, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1542, 0), _170446)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1542, 0), '$VAR'(_177906))
   Call: (270) [system] atom('$COMMENT'(";;           (@params (", 1542, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1542, 0), _170446)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1542, 0), _170446)
   Call: (270) [system] '$COMMENT'(";;           (@params (", 1542, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1542, 0), _170446)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1542, 0), _170446)
   Call: (270) [system] '$COMMENT'(";;           (@params (", 1542, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1542, 0), _170446)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1542, 0), _170446)
   Call: (270) [system] '$COMMENT'(";;           (@params (", 1542, 0)==[_187186, _187192]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1542, 0), _170446)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1542, 0), _170446)
   Call: (270) [system] is_list('$COMMENT'(";;           (@params (", 1542, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1542, 0), _170446)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1542, 0), _170446)
   Call: (270) [system] string('$COMMENT'(";;           (@params (", 1542, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1542, 0), _170446)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1542, 0), _170446)
   Call: (270) [system] compound('$COMMENT'(";;           (@params (", 1542, 0))
   Exit: (270) [system] compound('$COMMENT'(";;           (@params (", 1542, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1542, 0), _197388, _197390)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT', [";;           (@params (", 1542, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;           (@params (", 1542, 0], _201130)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@params (", 1542, 0], _201130)
   Call: (271) [apply] apply:maplist_([";;           (@params (", 1542, 0], _201130, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;           (@params (", 1542, 0], [_203948|_203950], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;           (@params (", _203948)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _203948)
   Call: (273) [system] var(";;           (@params (")
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _203948)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", '$VAR'(_208594))
   Call: (273) [system] atom(";;           (@params (")
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _203948)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _203948)
   Call: (273) [system] ";;           (@params ("==true
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _203948)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _203948)
   Call: (273) [system] ";;           (@params ("==false
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _203948)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _203948)
   Call: (273) [system] ";;           (@params ("==[_217874, _217880]
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _203948)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _203948)
   Call: (273) [system] is_list(";;           (@params (")
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _203948)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _203948)
   Call: (273) [system] string(";;           (@params (")
   Exit: (273) [system] string(";;           (@params (")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _203948)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _203948)
   Call: (273) [system] compound(";;           (@params (")
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _203948)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _203948)
^  Call: (273) [user] symbol(";;           (@params (")
^  Unify: (273) [user] symbol(";;           (@params (")
   Call: (274) [system] atom(";;           (@params (")
   Fail: (274) [system] atom(";;           (@params (")
^  Fail: (273) [user] symbol(";;           (@params (")
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _203948)
   Call: (273) [system] ";;           (@params ("=_203948
   Exit: (273) [system] ";;           (@params ("=";;           (@params ("
^  Exit: (272) [user] mfix_vars1(";;           (@params (", ";;           (@params (")
   Call: (272) [apply] apply:maplist_([1542, 0], _203950, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1542, 0], [_241946|_241948], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1542, _241946)
^  Unify: (273) [user] mfix_vars1(1542, _241946)
   Call: (274) [system] var(1542)
^  Redo: (273) [user] mfix_vars1(1542, _241946)
^  Unify: (273) [user] mfix_vars1(1542, '$VAR'(_246592))
   Call: (274) [system] atom(1542)
^  Redo: (273) [user] mfix_vars1(1542, _241946)
^  Unify: (273) [user] mfix_vars1(1542, _241946)
   Call: (274) [system] 1542==true
^  Redo: (273) [user] mfix_vars1(1542, _241946)
^  Unify: (273) [user] mfix_vars1(1542, _241946)
   Call: (274) [system] 1542==false
^  Redo: (273) [user] mfix_vars1(1542, _241946)
^  Unify: (273) [user] mfix_vars1(1542, _241946)
   Call: (274) [system] 1542==[_255872, _255878]
^  Redo: (273) [user] mfix_vars1(1542, _241946)
^  Unify: (273) [user] mfix_vars1(1542, _241946)
   Call: (274) [system] is_list(1542)
^  Redo: (273) [user] mfix_vars1(1542, _241946)
^  Unify: (273) [user] mfix_vars1(1542, _241946)
   Call: (274) [system] string(1542)
^  Redo: (273) [user] mfix_vars1(1542, _241946)
^  Unify: (273) [user] mfix_vars1(1542, _241946)
   Call: (274) [system] compound(1542)
^  Redo: (273) [user] mfix_vars1(1542, _241946)
^  Unify: (273) [user] mfix_vars1(1542, _241946)
^  Call: (274) [user] symbol(1542)
^  Unify: (274) [user] symbol(1542)
   Call: (275) [system] atom(1542)
   Fail: (275) [system] atom(1542)
^  Fail: (274) [user] symbol(1542)
^  Redo: (273) [user] mfix_vars1(1542, _241946)
   Call: (274) [system] 1542=_241946
   Exit: (274) [system] 1542=1542
^  Exit: (273) [user] mfix_vars1(1542, 1542)
   Call: (273) [apply] apply:maplist_([0], _241948, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_276272|_276274], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _276272)
^  Unify: (274) [user] mfix_vars1(0, _276272)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _276272)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_280918))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _276272)
^  Unify: (274) [user] mfix_vars1(0, _276272)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _276272)
^  Unify: (274) [user] mfix_vars1(0, _276272)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _276272)
^  Unify: (274) [user] mfix_vars1(0, _276272)
   Call: (275) [system] 0==[_290198, _290204]
^  Redo: (274) [user] mfix_vars1(0, _276272)
^  Unify: (274) [user] mfix_vars1(0, _276272)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _276272)
^  Unify: (274) [user] mfix_vars1(0, _276272)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _276272)
^  Unify: (274) [user] mfix_vars1(0, _276272)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _276272)
^  Unify: (274) [user] mfix_vars1(0, _276272)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _276272)
   Call: (275) [system] 0=_276272
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _276274, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1542, 0], [1542, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;           (@params (", 1542, 0], [";;           (@params (", 1542, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@params (", 1542, 0], [";;           (@params (", 1542, 0])
   Call: (270) [system] compound_name_arguments(_170446, '$COMMENT', [";;           (@params (", 1542, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT', [";;           (@params (", 1542, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@params (", 1542, 0)\=@='$COMMENT'(";;           (@params (", 1542, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1542, 0), _164860)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;           (@params (", 1542, 0), _326446))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@params (", 1542, 0), _326446))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;           (@params (", 1542, 0), _326446))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@params (", 1542, 0), _326446))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@params (", 1542, 0), _326446)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@params (", 1542, 0), _326446)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;           (@params (", 1542, 0), _332032))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@params (", 1542, 0), _332032))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;           (@params (", 1542, 0), _332032)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@params (", 1542, 0), _332032)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;           (@params (", 1542, 0), _332032)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@params (", 1542, 0)\=@='$COMMENT'(";;           (@params (", 1542, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@params (", 1542, 0), _326446)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;           (@params (", 1542, 0), _159248))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@params (", 1542, 0), _159248))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;           (@params (", 1542, 0), _159248))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@params (", 1542, 0), _159248))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@params (", 1542, 0), _159248)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@params (", 1542, 0), _159248)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;           (@params (", 1542, 0), _354352))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@params (", 1542, 0), _354352))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;           (@params (", 1542, 0), _354352)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@params (", 1542, 0), _354352)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;           (@params (", 1542, 0), _354352)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@params (", 1542, 0)\=@='$COMMENT'(";;           (@params (", 1542, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@params (", 1542, 0), _159248)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0)))
   Call: (261) [system] '$COMMENT'(";;           (@params (", 1542, 0)\=@='$COMMENT'(";;           (@params (", 1542, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@params (", 1542, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1542, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1542, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1542, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1542, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1542, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1542, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1542, 0), _383130, [], _383132)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;           (@params (", 1542, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1542, 0), _383130, [], _383132)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1542, 0), _383130, [], _383132)
   Call: (258) [system] atom('$COMMENT'(";;           (@params (", 1542, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1542, 0), _383130, [], _383132)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1542, 0), _383130, [], _383132)
   Call: (258) [system] compound('$COMMENT'(";;           (@params (", 1542, 0))
   Exit: (258) [system] compound('$COMMENT'(";;           (@params (", 1542, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1542, 0), _392446, _392448)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT', [";;           (@params (", 1542, 0])
^  Call: (258) [user] subst_vars([";;           (@params (", 1542, 0], _394332, [], _383132)
^  Unify: (258) [user] subst_vars([";;           (@params (", 1542, 0], [";;           (@params (", 1542, 0], [], [])
   Call: (259) [system] var([";;           (@params (", 1542, 0])
^  Redo: (258) [user] subst_vars([";;           (@params (", 1542, 0], _394332, [], _383132)
^  Unify: (258) [user] subst_vars([";;           (@params (", 1542, 0], [_398068|_398070], [], _383132)
^  Call: (259) [user] subst_vars(";;           (@params (", _398068, [], _399008)
^  Unify: (259) [user] subst_vars(";;           (@params (", ";;           (@params (", [], [])
   Call: (260) [system] var(";;           (@params (")
^  Redo: (259) [user] subst_vars(";;           (@params (", _398068, [], _399008)
^  Unify: (259) [user] subst_vars(";;           (@params (", _398068, [], _399008)
   Call: (260) [system] atom(";;           (@params (")
^  Redo: (259) [user] subst_vars(";;           (@params (", _398068, [], _399008)
^  Unify: (259) [user] subst_vars(";;           (@params (", _398068, [], _399008)
   Call: (260) [system] compound(";;           (@params (")
^  Redo: (259) [user] subst_vars(";;           (@params (", _398068, [], _399008)
^  Unify: (259) [user] subst_vars(";;           (@params (", ";;           (@params (", [], [])
^  Exit: (259) [user] subst_vars(";;           (@params (", ";;           (@params (", [], [])
^  Call: (259) [user] subst_vars([1542, 0], _398070, [], _383132)
^  Unify: (259) [user] subst_vars([1542, 0], [1542, 0], [], [])
   Call: (260) [system] var([1542, 0])
^  Redo: (259) [user] subst_vars([1542, 0], _398070, [], _383132)
^  Unify: (259) [user] subst_vars([1542, 0], [_413940|_413942], [], _383132)
^  Call: (260) [user] subst_vars(1542, _413940, [], _414880)
^  Unify: (260) [user] subst_vars(1542, 1542, [], [])
   Call: (261) [system] var(1542)
^  Redo: (260) [user] subst_vars(1542, _413940, [], _414880)
^  Unify: (260) [user] subst_vars(1542, _413940, [], _414880)
   Call: (261) [system] atom(1542)
^  Redo: (260) [user] subst_vars(1542, _413940, [], _414880)
^  Unify: (260) [user] subst_vars(1542, _413940, [], _414880)
   Call: (261) [system] compound(1542)
^  Redo: (260) [user] subst_vars(1542, _413940, [], _414880)
^  Unify: (260) [user] subst_vars(1542, 1542, [], [])
^  Exit: (260) [user] subst_vars(1542, 1542, [], [])
^  Call: (260) [user] subst_vars([0], _413942, [], _383132)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _413942, [], _383132)
^  Unify: (260) [user] subst_vars([0], [_429812|_429814], [], _383132)
^  Call: (261) [user] subst_vars(0, _429812, [], _430752)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _429812, [], _430752)
^  Unify: (261) [user] subst_vars(0, _429812, [], _430752)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _429812, [], _430752)
^  Unify: (261) [user] subst_vars(0, _429812, [], _430752)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _429812, [], _430752)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _429814, [], _383132)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _429814, [], _383132)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1542, 0], [1542, 0], [], [])
^  Exit: (258) [user] subst_vars([";;           (@params (", 1542, 0], [";;           (@params (", 1542, 0], [], [])
   Call: (258) [system] compound_name_arguments(_383130, '$COMMENT', [";;           (@params (", 1542, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT', [";;           (@params (", 1542, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1542, 0), '$COMMENT'(";;           (@params (", 1542, 0), [], [])
   Call: (257) [system] _453170=metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1542, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1542, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1542, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1542, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1542, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1542, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1542, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1542, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1542, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1543, 0, 55485, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$stream_position'(55485, 1543, 0, 55519)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _505896))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _505896))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _505896)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _505896)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _505896)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _505896)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _511508))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _511508))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _511508))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _511508))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _511508)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _511508)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _517094))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _517094))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _517094)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _517094)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _517094)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _517094)
   Call: (270) [system] var('$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5986)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$VAR'(_6618))
   Call: (270) [system] atom('$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5986)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5986)
   Call: (270) [system] '$COMMENT'(";;             (@param \"First argument\")", 1543, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5986)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5986)
   Call: (270) [system] '$COMMENT'(";;             (@param \"First argument\")", 1543, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5986)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5986)
   Call: (270) [system] '$COMMENT'(";;             (@param \"First argument\")", 1543, 0)==[_15898, _15904]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5986)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5986)
   Call: (270) [system] is_list('$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5986)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5986)
   Call: (270) [system] string('$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5986)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5986)
   Call: (270) [system] compound('$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _26100, _26102)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT', [";;             (@param \"First argument\")", 1543, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (@param \"First argument\")", 1543, 0], _29842)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (@param \"First argument\")", 1543, 0], _29842)
   Call: (271) [apply] apply:maplist_([";;             (@param \"First argument\")", 1543, 0], _29842, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (@param \"First argument\")", 1543, 0], [_32660|_32662], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _32660)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _32660)
   Call: (273) [system] var(";;             (@param \"First argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _32660)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", '$VAR'(_37306))
   Call: (273) [system] atom(";;             (@param \"First argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _32660)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _32660)
   Call: (273) [system] ";;             (@param \"First argument\")"==true
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _32660)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _32660)
   Call: (273) [system] ";;             (@param \"First argument\")"==false
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _32660)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _32660)
   Call: (273) [system] ";;             (@param \"First argument\")"==[_46586, _46592]
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _32660)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _32660)
   Call: (273) [system] is_list(";;             (@param \"First argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _32660)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _32660)
   Call: (273) [system] string(";;             (@param \"First argument\")")
   Exit: (273) [system] string(";;             (@param \"First argument\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _32660)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _32660)
   Call: (273) [system] compound(";;             (@param \"First argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _32660)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _32660)
^  Call: (273) [user] symbol(";;             (@param \"First argument\")")
^  Unify: (273) [user] symbol(";;             (@param \"First argument\")")
   Call: (274) [system] atom(";;             (@param \"First argument\")")
   Fail: (274) [system] atom(";;             (@param \"First argument\")")
^  Fail: (273) [user] symbol(";;             (@param \"First argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _32660)
   Call: (273) [system] ";;             (@param \"First argument\")"=_32660
   Exit: (273) [system] ";;             (@param \"First argument\")"=";;             (@param \"First argument\")"
^  Exit: (272) [user] mfix_vars1(";;             (@param \"First argument\")", ";;             (@param \"First argument\")")
   Call: (272) [apply] apply:maplist_([1543, 0], _32662, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1543, 0], [_70658|_70660], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1543, _70658)
^  Unify: (273) [user] mfix_vars1(1543, _70658)
   Call: (274) [system] var(1543)
^  Redo: (273) [user] mfix_vars1(1543, _70658)
^  Unify: (273) [user] mfix_vars1(1543, '$VAR'(_75304))
   Call: (274) [system] atom(1543)
^  Redo: (273) [user] mfix_vars1(1543, _70658)
^  Unify: (273) [user] mfix_vars1(1543, _70658)
   Call: (274) [system] 1543==true
^  Redo: (273) [user] mfix_vars1(1543, _70658)
^  Unify: (273) [user] mfix_vars1(1543, _70658)
   Call: (274) [system] 1543==false
^  Redo: (273) [user] mfix_vars1(1543, _70658)
^  Unify: (273) [user] mfix_vars1(1543, _70658)
   Call: (274) [system] 1543==[_84584, _84590]
^  Redo: (273) [user] mfix_vars1(1543, _70658)
^  Unify: (273) [user] mfix_vars1(1543, _70658)
   Call: (274) [system] is_list(1543)
^  Redo: (273) [user] mfix_vars1(1543, _70658)
^  Unify: (273) [user] mfix_vars1(1543, _70658)
   Call: (274) [system] string(1543)
^  Redo: (273) [user] mfix_vars1(1543, _70658)
^  Unify: (273) [user] mfix_vars1(1543, _70658)
   Call: (274) [system] compound(1543)
^  Redo: (273) [user] mfix_vars1(1543, _70658)
^  Unify: (273) [user] mfix_vars1(1543, _70658)
^  Call: (274) [user] symbol(1543)
^  Unify: (274) [user] symbol(1543)
   Call: (275) [system] atom(1543)
   Fail: (275) [system] atom(1543)
^  Fail: (274) [user] symbol(1543)
^  Redo: (273) [user] mfix_vars1(1543, _70658)
   Call: (274) [system] 1543=_70658
   Exit: (274) [system] 1543=1543
^  Exit: (273) [user] mfix_vars1(1543, 1543)
   Call: (273) [apply] apply:maplist_([0], _70660, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_104984|_104986], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _104984)
^  Unify: (274) [user] mfix_vars1(0, _104984)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _104984)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_109630))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _104984)
^  Unify: (274) [user] mfix_vars1(0, _104984)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _104984)
^  Unify: (274) [user] mfix_vars1(0, _104984)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _104984)
^  Unify: (274) [user] mfix_vars1(0, _104984)
   Call: (275) [system] 0==[_118910, _118916]
^  Redo: (274) [user] mfix_vars1(0, _104984)
^  Unify: (274) [user] mfix_vars1(0, _104984)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _104984)
^  Unify: (274) [user] mfix_vars1(0, _104984)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _104984)
^  Unify: (274) [user] mfix_vars1(0, _104984)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _104984)
^  Unify: (274) [user] mfix_vars1(0, _104984)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _104984)
   Call: (275) [system] 0=_104984
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _104986, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1543, 0], [1543, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (@param \"First argument\")", 1543, 0], [";;             (@param \"First argument\")", 1543, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (@param \"First argument\")", 1543, 0], [";;             (@param \"First argument\")", 1543, 0])
   Call: (270) [system] compound_name_arguments(_5986, '$COMMENT', [";;             (@param \"First argument\")", 1543, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT', [";;             (@param \"First argument\")", 1543, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"First argument\")", 1543, 0)\=@='$COMMENT'(";;             (@param \"First argument\")", 1543, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5972)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _155158))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _155158))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _155158))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _155158))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _155158)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _155158)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _160744))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _160744))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _160744)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _160744)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _160744)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"First argument\")", 1543, 0)\=@='$COMMENT'(";;             (@param \"First argument\")", 1543, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _155158)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5952))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5952))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5952))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5952))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5952)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _183064))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _183064))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _183064)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _183064)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _183064)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"First argument\")", 1543, 0)\=@='$COMMENT'(";;             (@param \"First argument\")", 1543, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0)))
   Call: (261) [system] '$COMMENT'(";;             (@param \"First argument\")", 1543, 0)\=@='$COMMENT'(";;             (@param \"First argument\")", 1543, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _211842, [], _211844)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _211842, [], _211844)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _211842, [], _211844)
   Call: (258) [system] atom('$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _211842, [], _211844)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _211842, [], _211844)
   Call: (258) [system] compound('$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (@param \"First argument\")", 1543, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), _221158, _221160)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT', [";;             (@param \"First argument\")", 1543, 0])
^  Call: (258) [user] subst_vars([";;             (@param \"First argument\")", 1543, 0], _223044, [], _211844)
^  Unify: (258) [user] subst_vars([";;             (@param \"First argument\")", 1543, 0], [";;             (@param \"First argument\")", 1543, 0], [], [])
   Call: (259) [system] var([";;             (@param \"First argument\")", 1543, 0])
^  Redo: (258) [user] subst_vars([";;             (@param \"First argument\")", 1543, 0], _223044, [], _211844)
^  Unify: (258) [user] subst_vars([";;             (@param \"First argument\")", 1543, 0], [_226780|_226782], [], _211844)
^  Call: (259) [user] subst_vars(";;             (@param \"First argument\")", _226780, [], _227720)
^  Unify: (259) [user] subst_vars(";;             (@param \"First argument\")", ";;             (@param \"First argument\")", [], [])
   Call: (260) [system] var(";;             (@param \"First argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"First argument\")", _226780, [], _227720)
^  Unify: (259) [user] subst_vars(";;             (@param \"First argument\")", _226780, [], _227720)
   Call: (260) [system] atom(";;             (@param \"First argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"First argument\")", _226780, [], _227720)
^  Unify: (259) [user] subst_vars(";;             (@param \"First argument\")", _226780, [], _227720)
   Call: (260) [system] compound(";;             (@param \"First argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"First argument\")", _226780, [], _227720)
^  Unify: (259) [user] subst_vars(";;             (@param \"First argument\")", ";;             (@param \"First argument\")", [], [])
^  Exit: (259) [user] subst_vars(";;             (@param \"First argument\")", ";;             (@param \"First argument\")", [], [])
^  Call: (259) [user] subst_vars([1543, 0], _226782, [], _211844)
^  Unify: (259) [user] subst_vars([1543, 0], [1543, 0], [], [])
   Call: (260) [system] var([1543, 0])
^  Redo: (259) [user] subst_vars([1543, 0], _226782, [], _211844)
^  Unify: (259) [user] subst_vars([1543, 0], [_242652|_242654], [], _211844)
^  Call: (260) [user] subst_vars(1543, _242652, [], _243592)
^  Unify: (260) [user] subst_vars(1543, 1543, [], [])
   Call: (261) [system] var(1543)
^  Redo: (260) [user] subst_vars(1543, _242652, [], _243592)
^  Unify: (260) [user] subst_vars(1543, _242652, [], _243592)
   Call: (261) [system] atom(1543)
^  Redo: (260) [user] subst_vars(1543, _242652, [], _243592)
^  Unify: (260) [user] subst_vars(1543, _242652, [], _243592)
   Call: (261) [system] compound(1543)
^  Redo: (260) [user] subst_vars(1543, _242652, [], _243592)
^  Unify: (260) [user] subst_vars(1543, 1543, [], [])
^  Exit: (260) [user] subst_vars(1543, 1543, [], [])
^  Call: (260) [user] subst_vars([0], _242654, [], _211844)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _242654, [], _211844)
^  Unify: (260) [user] subst_vars([0], [_258524|_258526], [], _211844)
^  Call: (261) [user] subst_vars(0, _258524, [], _259464)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _258524, [], _259464)
^  Unify: (261) [user] subst_vars(0, _258524, [], _259464)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _258524, [], _259464)
^  Unify: (261) [user] subst_vars(0, _258524, [], _259464)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _258524, [], _259464)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _258526, [], _211844)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _258526, [], _211844)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1543, 0], [1543, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (@param \"First argument\")", 1543, 0], [";;             (@param \"First argument\")", 1543, 0], [], [])
   Call: (258) [system] compound_name_arguments(_211842, '$COMMENT', [";;             (@param \"First argument\")", 1543, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT', [";;             (@param \"First argument\")", 1543, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1543, 0), '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), [], [])
   Call: (257) [system] _281882=metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1543, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1544, 0, 55526, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$stream_position'(55526, 1544, 0, 55560)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _334608))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _334608))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _334608)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _334608)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _334608)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _334608)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _340220))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _340220))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _340220))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _340220))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _340220)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _340220)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _345806))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _345806))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _345806)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _345806)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _345806)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _345806)
   Call: (270) [system] var('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _345806)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$VAR'(_353266))
   Call: (270) [system] atom('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _345806)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _345806)
   Call: (270) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _345806)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _345806)
   Call: (270) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _345806)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _345806)
   Call: (270) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0)==[_362546, _362552]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _345806)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _345806)
   Call: (270) [system] is_list('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _345806)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _345806)
   Call: (270) [system] string('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _345806)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _345806)
   Call: (270) [system] compound('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _372748, _372750)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT', [";;             (@param \"Second argument\")", 1544, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (@param \"Second argument\")", 1544, 0], _376490)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (@param \"Second argument\")", 1544, 0], _376490)
   Call: (271) [apply] apply:maplist_([";;             (@param \"Second argument\")", 1544, 0], _376490, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (@param \"Second argument\")", 1544, 0], [_379308|_379310], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _379308)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _379308)
   Call: (273) [system] var(";;             (@param \"Second argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _379308)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", '$VAR'(_383954))
   Call: (273) [system] atom(";;             (@param \"Second argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _379308)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _379308)
   Call: (273) [system] ";;             (@param \"Second argument\")"==true
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _379308)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _379308)
   Call: (273) [system] ";;             (@param \"Second argument\")"==false
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _379308)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _379308)
   Call: (273) [system] ";;             (@param \"Second argument\")"==[_393234, _393240]
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _379308)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _379308)
   Call: (273) [system] is_list(";;             (@param \"Second argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _379308)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _379308)
   Call: (273) [system] string(";;             (@param \"Second argument\")")
   Exit: (273) [system] string(";;             (@param \"Second argument\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _379308)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _379308)
   Call: (273) [system] compound(";;             (@param \"Second argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _379308)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _379308)
^  Call: (273) [user] symbol(";;             (@param \"Second argument\")")
^  Unify: (273) [user] symbol(";;             (@param \"Second argument\")")
   Call: (274) [system] atom(";;             (@param \"Second argument\")")
   Fail: (274) [system] atom(";;             (@param \"Second argument\")")
^  Fail: (273) [user] symbol(";;             (@param \"Second argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _379308)
   Call: (273) [system] ";;             (@param \"Second argument\")"=_379308
   Exit: (273) [system] ";;             (@param \"Second argument\")"=";;             (@param \"Second argument\")"
^  Exit: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", ";;             (@param \"Second argument\")")
   Call: (272) [apply] apply:maplist_([1544, 0], _379310, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1544, 0], [_417306|_417308], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1544, _417306)
^  Unify: (273) [user] mfix_vars1(1544, _417306)
   Call: (274) [system] var(1544)
^  Redo: (273) [user] mfix_vars1(1544, _417306)
^  Unify: (273) [user] mfix_vars1(1544, '$VAR'(_421952))
   Call: (274) [system] atom(1544)
^  Redo: (273) [user] mfix_vars1(1544, _417306)
^  Unify: (273) [user] mfix_vars1(1544, _417306)
   Call: (274) [system] 1544==true
^  Redo: (273) [user] mfix_vars1(1544, _417306)
^  Unify: (273) [user] mfix_vars1(1544, _417306)
   Call: (274) [system] 1544==false
^  Redo: (273) [user] mfix_vars1(1544, _417306)
^  Unify: (273) [user] mfix_vars1(1544, _417306)
   Call: (274) [system] 1544==[_431232, _431238]
^  Redo: (273) [user] mfix_vars1(1544, _417306)
^  Unify: (273) [user] mfix_vars1(1544, _417306)
   Call: (274) [system] is_list(1544)
^  Redo: (273) [user] mfix_vars1(1544, _417306)
^  Unify: (273) [user] mfix_vars1(1544, _417306)
   Call: (274) [system] string(1544)
^  Redo: (273) [user] mfix_vars1(1544, _417306)
^  Unify: (273) [user] mfix_vars1(1544, _417306)
   Call: (274) [system] compound(1544)
^  Redo: (273) [user] mfix_vars1(1544, _417306)
^  Unify: (273) [user] mfix_vars1(1544, _417306)
^  Call: (274) [user] symbol(1544)
^  Unify: (274) [user] symbol(1544)
   Call: (275) [system] atom(1544)
   Fail: (275) [system] atom(1544)
^  Fail: (274) [user] symbol(1544)
^  Redo: (273) [user] mfix_vars1(1544, _417306)
   Call: (274) [system] 1544=_417306
   Exit: (274) [system] 1544=1544
^  Exit: (273) [user] mfix_vars1(1544, 1544)
   Call: (273) [apply] apply:maplist_([0], _417308, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_451632|_451634], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _451632)
^  Unify: (274) [user] mfix_vars1(0, _451632)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _451632)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_456278))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _451632)
^  Unify: (274) [user] mfix_vars1(0, _451632)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _451632)
^  Unify: (274) [user] mfix_vars1(0, _451632)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _451632)
^  Unify: (274) [user] mfix_vars1(0, _451632)
   Call: (275) [system] 0==[_465558, _465564]
^  Redo: (274) [user] mfix_vars1(0, _451632)
^  Unify: (274) [user] mfix_vars1(0, _451632)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _451632)
^  Unify: (274) [user] mfix_vars1(0, _451632)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _451632)
^  Unify: (274) [user] mfix_vars1(0, _451632)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _451632)
^  Unify: (274) [user] mfix_vars1(0, _451632)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _451632)
   Call: (275) [system] 0=_451632
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _451634, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1544, 0], [1544, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (@param \"Second argument\")", 1544, 0], [";;             (@param \"Second argument\")", 1544, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (@param \"Second argument\")", 1544, 0], [";;             (@param \"Second argument\")", 1544, 0])
   Call: (270) [system] compound_name_arguments(_345806, '$COMMENT', [";;             (@param \"Second argument\")", 1544, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT', [";;             (@param \"Second argument\")", 1544, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0)\=@='$COMMENT'(";;             (@param \"Second argument\")", 1544, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _340220)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _501806))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _501806))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _501806))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _501806))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _501806)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _501806)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _507392))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _507392))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _507392)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _507392)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _507392)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0)\=@='$COMMENT'(";;             (@param \"Second argument\")", 1544, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _501806)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _5952))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _5952))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _5952))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _5952))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _5952)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _11530))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _11530))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _11530)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _11530)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _11530)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0)\=@='$COMMENT'(";;             (@param \"Second argument\")", 1544, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0)))
   Call: (261) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0)\=@='$COMMENT'(";;             (@param \"Second argument\")", 1544, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _40308, [], _40310)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _40308, [], _40310)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _40308, [], _40310)
   Call: (258) [system] atom('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _40308, [], _40310)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _40308, [], _40310)
   Call: (258) [system] compound('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), _49624, _49626)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT', [";;             (@param \"Second argument\")", 1544, 0])
^  Call: (258) [user] subst_vars([";;             (@param \"Second argument\")", 1544, 0], _51510, [], _40310)
^  Unify: (258) [user] subst_vars([";;             (@param \"Second argument\")", 1544, 0], [";;             (@param \"Second argument\")", 1544, 0], [], [])
   Call: (259) [system] var([";;             (@param \"Second argument\")", 1544, 0])
^  Redo: (258) [user] subst_vars([";;             (@param \"Second argument\")", 1544, 0], _51510, [], _40310)
^  Unify: (258) [user] subst_vars([";;             (@param \"Second argument\")", 1544, 0], [_55246|_55248], [], _40310)
^  Call: (259) [user] subst_vars(";;             (@param \"Second argument\")", _55246, [], _56186)
^  Unify: (259) [user] subst_vars(";;             (@param \"Second argument\")", ";;             (@param \"Second argument\")", [], [])
   Call: (260) [system] var(";;             (@param \"Second argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"Second argument\")", _55246, [], _56186)
^  Unify: (259) [user] subst_vars(";;             (@param \"Second argument\")", _55246, [], _56186)
   Call: (260) [system] atom(";;             (@param \"Second argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"Second argument\")", _55246, [], _56186)
^  Unify: (259) [user] subst_vars(";;             (@param \"Second argument\")", _55246, [], _56186)
   Call: (260) [system] compound(";;             (@param \"Second argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"Second argument\")", _55246, [], _56186)
^  Unify: (259) [user] subst_vars(";;             (@param \"Second argument\")", ";;             (@param \"Second argument\")", [], [])
^  Exit: (259) [user] subst_vars(";;             (@param \"Second argument\")", ";;             (@param \"Second argument\")", [], [])
^  Call: (259) [user] subst_vars([1544, 0], _55248, [], _40310)
^  Unify: (259) [user] subst_vars([1544, 0], [1544, 0], [], [])
   Call: (260) [system] var([1544, 0])
^  Redo: (259) [user] subst_vars([1544, 0], _55248, [], _40310)
^  Unify: (259) [user] subst_vars([1544, 0], [_71118|_71120], [], _40310)
^  Call: (260) [user] subst_vars(1544, _71118, [], _72058)
^  Unify: (260) [user] subst_vars(1544, 1544, [], [])
   Call: (261) [system] var(1544)
^  Redo: (260) [user] subst_vars(1544, _71118, [], _72058)
^  Unify: (260) [user] subst_vars(1544, _71118, [], _72058)
   Call: (261) [system] atom(1544)
^  Redo: (260) [user] subst_vars(1544, _71118, [], _72058)
^  Unify: (260) [user] subst_vars(1544, _71118, [], _72058)
   Call: (261) [system] compound(1544)
^  Redo: (260) [user] subst_vars(1544, _71118, [], _72058)
^  Unify: (260) [user] subst_vars(1544, 1544, [], [])
^  Exit: (260) [user] subst_vars(1544, 1544, [], [])
^  Call: (260) [user] subst_vars([0], _71120, [], _40310)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _71120, [], _40310)
^  Unify: (260) [user] subst_vars([0], [_86990|_86992], [], _40310)
^  Call: (261) [user] subst_vars(0, _86990, [], _87930)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _86990, [], _87930)
^  Unify: (261) [user] subst_vars(0, _86990, [], _87930)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _86990, [], _87930)
^  Unify: (261) [user] subst_vars(0, _86990, [], _87930)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _86990, [], _87930)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _86992, [], _40310)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _86992, [], _40310)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1544, 0], [1544, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (@param \"Second argument\")", 1544, 0], [";;             (@param \"Second argument\")", 1544, 0], [], [])
   Call: (258) [system] compound_name_arguments(_40308, '$COMMENT', [";;             (@param \"Second argument\")", 1544, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT', [";;             (@param \"Second argument\")", 1544, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), [], [])
   Call: (257) [system] _110348=metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1544, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1545, 0, 55568, '$COMMENT'(";;           ))", 1545, 0), '$stream_position'(55568, 1545, 0, 55602)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           ))", 1545, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           ))", 1545, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;           ))", 1545, 0), _163068))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           ))", 1545, 0), _163068))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;           ))", 1545, 0), _163068)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           ))", 1545, 0), _163068)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;           ))", 1545, 0), _163068)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;           ))", 1545, 0), _163068)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;           ))", 1545, 0), _168680))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           ))", 1545, 0), _168680))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;           ))", 1545, 0), _168680))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           ))", 1545, 0), _168680))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           ))", 1545, 0), _168680)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           ))", 1545, 0), _168680)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;           ))", 1545, 0), _174266))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           ))", 1545, 0), _174266))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;           ))", 1545, 0), _174266)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           ))", 1545, 0), _174266)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1545, 0), _174266)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1545, 0), _174266)
   Call: (270) [system] var('$COMMENT'(";;           ))", 1545, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1545, 0), _174266)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1545, 0), '$VAR'(_181726))
   Call: (270) [system] atom('$COMMENT'(";;           ))", 1545, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1545, 0), _174266)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1545, 0), _174266)
   Call: (270) [system] '$COMMENT'(";;           ))", 1545, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1545, 0), _174266)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1545, 0), _174266)
   Call: (270) [system] '$COMMENT'(";;           ))", 1545, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1545, 0), _174266)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1545, 0), _174266)
   Call: (270) [system] '$COMMENT'(";;           ))", 1545, 0)==[_191006, _191012]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1545, 0), _174266)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1545, 0), _174266)
   Call: (270) [system] is_list('$COMMENT'(";;           ))", 1545, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1545, 0), _174266)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1545, 0), _174266)
   Call: (270) [system] string('$COMMENT'(";;           ))", 1545, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1545, 0), _174266)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1545, 0), _174266)
   Call: (270) [system] compound('$COMMENT'(";;           ))", 1545, 0))
   Exit: (270) [system] compound('$COMMENT'(";;           ))", 1545, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;           ))", 1545, 0), _201208, _201210)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           ))", 1545, 0), '$COMMENT', [";;           ))", 1545, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;           ))", 1545, 0], _204950)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;           ))", 1545, 0], _204950)
   Call: (271) [apply] apply:maplist_([";;           ))", 1545, 0], _204950, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;           ))", 1545, 0], [_207768|_207770], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;           ))", _207768)
^  Unify: (272) [user] mfix_vars1(";;           ))", _207768)
   Call: (273) [system] var(";;           ))")
^  Redo: (272) [user] mfix_vars1(";;           ))", _207768)
^  Unify: (272) [user] mfix_vars1(";;           ))", '$VAR'(_212414))
   Call: (273) [system] atom(";;           ))")
^  Redo: (272) [user] mfix_vars1(";;           ))", _207768)
^  Unify: (272) [user] mfix_vars1(";;           ))", _207768)
   Call: (273) [system] ";;           ))"==true
^  Redo: (272) [user] mfix_vars1(";;           ))", _207768)
^  Unify: (272) [user] mfix_vars1(";;           ))", _207768)
   Call: (273) [system] ";;           ))"==false
^  Redo: (272) [user] mfix_vars1(";;           ))", _207768)
^  Unify: (272) [user] mfix_vars1(";;           ))", _207768)
   Call: (273) [system] ";;           ))"==[_221694, _221700]
^  Redo: (272) [user] mfix_vars1(";;           ))", _207768)
^  Unify: (272) [user] mfix_vars1(";;           ))", _207768)
   Call: (273) [system] is_list(";;           ))")
^  Redo: (272) [user] mfix_vars1(";;           ))", _207768)
^  Unify: (272) [user] mfix_vars1(";;           ))", _207768)
   Call: (273) [system] string(";;           ))")
   Exit: (273) [system] string(";;           ))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;           ))", _207768)
^  Unify: (272) [user] mfix_vars1(";;           ))", _207768)
   Call: (273) [system] compound(";;           ))")
^  Redo: (272) [user] mfix_vars1(";;           ))", _207768)
^  Unify: (272) [user] mfix_vars1(";;           ))", _207768)
^  Call: (273) [user] symbol(";;           ))")
^  Unify: (273) [user] symbol(";;           ))")
   Call: (274) [system] atom(";;           ))")
   Fail: (274) [system] atom(";;           ))")
^  Fail: (273) [user] symbol(";;           ))")
^  Redo: (272) [user] mfix_vars1(";;           ))", _207768)
   Call: (273) [system] ";;           ))"=_207768
   Exit: (273) [system] ";;           ))"=";;           ))"
^  Exit: (272) [user] mfix_vars1(";;           ))", ";;           ))")
   Call: (272) [apply] apply:maplist_([1545, 0], _207770, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1545, 0], [_245766|_245768], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1545, _245766)
^  Unify: (273) [user] mfix_vars1(1545, _245766)
   Call: (274) [system] var(1545)
^  Redo: (273) [user] mfix_vars1(1545, _245766)
^  Unify: (273) [user] mfix_vars1(1545, '$VAR'(_250412))
   Call: (274) [system] atom(1545)
^  Redo: (273) [user] mfix_vars1(1545, _245766)
^  Unify: (273) [user] mfix_vars1(1545, _245766)
   Call: (274) [system] 1545==true
^  Redo: (273) [user] mfix_vars1(1545, _245766)
^  Unify: (273) [user] mfix_vars1(1545, _245766)
   Call: (274) [system] 1545==false
^  Redo: (273) [user] mfix_vars1(1545, _245766)
^  Unify: (273) [user] mfix_vars1(1545, _245766)
   Call: (274) [system] 1545==[_259692, _259698]
^  Redo: (273) [user] mfix_vars1(1545, _245766)
^  Unify: (273) [user] mfix_vars1(1545, _245766)
   Call: (274) [system] is_list(1545)
^  Redo: (273) [user] mfix_vars1(1545, _245766)
^  Unify: (273) [user] mfix_vars1(1545, _245766)
   Call: (274) [system] string(1545)
^  Redo: (273) [user] mfix_vars1(1545, _245766)
^  Unify: (273) [user] mfix_vars1(1545, _245766)
   Call: (274) [system] compound(1545)
^  Redo: (273) [user] mfix_vars1(1545, _245766)
^  Unify: (273) [user] mfix_vars1(1545, _245766)
^  Call: (274) [user] symbol(1545)
^  Unify: (274) [user] symbol(1545)
   Call: (275) [system] atom(1545)
   Fail: (275) [system] atom(1545)
^  Fail: (274) [user] symbol(1545)
^  Redo: (273) [user] mfix_vars1(1545, _245766)
   Call: (274) [system] 1545=_245766
   Exit: (274) [system] 1545=1545
^  Exit: (273) [user] mfix_vars1(1545, 1545)
   Call: (273) [apply] apply:maplist_([0], _245768, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_280092|_280094], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _280092)
^  Unify: (274) [user] mfix_vars1(0, _280092)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _280092)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_284738))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _280092)
^  Unify: (274) [user] mfix_vars1(0, _280092)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _280092)
^  Unify: (274) [user] mfix_vars1(0, _280092)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _280092)
^  Unify: (274) [user] mfix_vars1(0, _280092)
   Call: (275) [system] 0==[_294018, _294024]
^  Redo: (274) [user] mfix_vars1(0, _280092)
^  Unify: (274) [user] mfix_vars1(0, _280092)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _280092)
^  Unify: (274) [user] mfix_vars1(0, _280092)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _280092)
^  Unify: (274) [user] mfix_vars1(0, _280092)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _280092)
^  Unify: (274) [user] mfix_vars1(0, _280092)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _280092)
   Call: (275) [system] 0=_280092
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _280094, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1545, 0], [1545, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;           ))", 1545, 0], [";;           ))", 1545, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;           ))", 1545, 0], [";;           ))", 1545, 0])
   Call: (270) [system] compound_name_arguments(_174266, '$COMMENT', [";;           ))", 1545, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           ))", 1545, 0), '$COMMENT', [";;           ))", 1545, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0)))
   Call: (267) [system] '$COMMENT'(";;           ))", 1545, 0)\=@='$COMMENT'(";;           ))", 1545, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           ))", 1545, 0), _168680)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;           ))", 1545, 0), _330266))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           ))", 1545, 0), _330266))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;           ))", 1545, 0), _330266))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           ))", 1545, 0), _330266))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;           ))", 1545, 0), _330266)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           ))", 1545, 0), _330266)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;           ))", 1545, 0), _335852))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           ))", 1545, 0), _335852))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;           ))", 1545, 0), _335852)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           ))", 1545, 0), _335852)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;           ))", 1545, 0), _335852)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0)))
   Call: (267) [system] '$COMMENT'(";;           ))", 1545, 0)\=@='$COMMENT'(";;           ))", 1545, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;           ))", 1545, 0), _330266)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;           ))", 1545, 0), _163068))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           ))", 1545, 0), _163068))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;           ))", 1545, 0), _163068))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           ))", 1545, 0), _163068))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;           ))", 1545, 0), _163068)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           ))", 1545, 0), _163068)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;           ))", 1545, 0), _358172))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           ))", 1545, 0), _358172))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;           ))", 1545, 0), _358172)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           ))", 1545, 0), _358172)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;           ))", 1545, 0), _358172)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0)))
   Call: (267) [system] '$COMMENT'(";;           ))", 1545, 0)\=@='$COMMENT'(";;           ))", 1545, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;           ))", 1545, 0), _163068)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0)))
   Call: (261) [system] '$COMMENT'(";;           ))", 1545, 0)\=@='$COMMENT'(";;           ))", 1545, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           ))", 1545, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1545, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1545, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1545, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1545, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1545, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1545, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;           ))", 1545, 0), _386950, [], _386952)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;           ))", 1545, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           ))", 1545, 0), _386950, [], _386952)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           ))", 1545, 0), _386950, [], _386952)
   Call: (258) [system] atom('$COMMENT'(";;           ))", 1545, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           ))", 1545, 0), _386950, [], _386952)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           ))", 1545, 0), _386950, [], _386952)
   Call: (258) [system] compound('$COMMENT'(";;           ))", 1545, 0))
   Exit: (258) [system] compound('$COMMENT'(";;           ))", 1545, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;           ))", 1545, 0), _396266, _396268)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           ))", 1545, 0), '$COMMENT', [";;           ))", 1545, 0])
^  Call: (258) [user] subst_vars([";;           ))", 1545, 0], _398152, [], _386952)
^  Unify: (258) [user] subst_vars([";;           ))", 1545, 0], [";;           ))", 1545, 0], [], [])
   Call: (259) [system] var([";;           ))", 1545, 0])
^  Redo: (258) [user] subst_vars([";;           ))", 1545, 0], _398152, [], _386952)
^  Unify: (258) [user] subst_vars([";;           ))", 1545, 0], [_401888|_401890], [], _386952)
^  Call: (259) [user] subst_vars(";;           ))", _401888, [], _402828)
^  Unify: (259) [user] subst_vars(";;           ))", ";;           ))", [], [])
   Call: (260) [system] var(";;           ))")
^  Redo: (259) [user] subst_vars(";;           ))", _401888, [], _402828)
^  Unify: (259) [user] subst_vars(";;           ))", _401888, [], _402828)
   Call: (260) [system] atom(";;           ))")
^  Redo: (259) [user] subst_vars(";;           ))", _401888, [], _402828)
^  Unify: (259) [user] subst_vars(";;           ))", _401888, [], _402828)
   Call: (260) [system] compound(";;           ))")
^  Redo: (259) [user] subst_vars(";;           ))", _401888, [], _402828)
^  Unify: (259) [user] subst_vars(";;           ))", ";;           ))", [], [])
^  Exit: (259) [user] subst_vars(";;           ))", ";;           ))", [], [])
^  Call: (259) [user] subst_vars([1545, 0], _401890, [], _386952)
^  Unify: (259) [user] subst_vars([1545, 0], [1545, 0], [], [])
   Call: (260) [system] var([1545, 0])
^  Redo: (259) [user] subst_vars([1545, 0], _401890, [], _386952)
^  Unify: (259) [user] subst_vars([1545, 0], [_417760|_417762], [], _386952)
^  Call: (260) [user] subst_vars(1545, _417760, [], _418700)
^  Unify: (260) [user] subst_vars(1545, 1545, [], [])
   Call: (261) [system] var(1545)
^  Redo: (260) [user] subst_vars(1545, _417760, [], _418700)
^  Unify: (260) [user] subst_vars(1545, _417760, [], _418700)
   Call: (261) [system] atom(1545)
^  Redo: (260) [user] subst_vars(1545, _417760, [], _418700)
^  Unify: (260) [user] subst_vars(1545, _417760, [], _418700)
   Call: (261) [system] compound(1545)
^  Redo: (260) [user] subst_vars(1545, _417760, [], _418700)
^  Unify: (260) [user] subst_vars(1545, 1545, [], [])
^  Exit: (260) [user] subst_vars(1545, 1545, [], [])
^  Call: (260) [user] subst_vars([0], _417762, [], _386952)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _417762, [], _386952)
^  Unify: (260) [user] subst_vars([0], [_433632|_433634], [], _386952)
^  Call: (261) [user] subst_vars(0, _433632, [], _434572)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _433632, [], _434572)
^  Unify: (261) [user] subst_vars(0, _433632, [], _434572)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _433632, [], _434572)
^  Unify: (261) [user] subst_vars(0, _433632, [], _434572)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _433632, [], _434572)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _433634, [], _386952)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _433634, [], _386952)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1545, 0], [1545, 0], [], [])
^  Exit: (258) [user] subst_vars([";;           ))", 1545, 0], [";;           ))", 1545, 0], [], [])
   Call: (258) [system] compound_name_arguments(_386950, '$COMMENT', [";;           ))", 1545, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           ))", 1545, 0), '$COMMENT', [";;           ))", 1545, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;           ))", 1545, 0), '$COMMENT'(";;           ))", 1545, 0), [], [])
   Call: (257) [system] _456990=metta_file_buffer(+, '$COMMENT'(";;           ))", 1545, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;           ))", 1545, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;           ))", 1545, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           ))", 1545, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           ))", 1545, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           ))", 1545, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           ))", 1545, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           ))", 1545, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           ))", 1545, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1546, 0, 55584, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$stream_position'(55584, 1546, 0, 55618)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _509714))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _509714))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _509714)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _509714)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _509714)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _509714)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _515326))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _515326))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _515326))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _515326))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _515326)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _515326)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _520912))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _520912))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _520912)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5984)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5984)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5984)
   Call: (270) [system] var('$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5984)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$VAR'(_10420))
   Call: (270) [system] atom('$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5984)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5984)
   Call: (270) [system] '$COMMENT'(";;           (@return \"Return value\")", 1546, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5984)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5984)
   Call: (270) [system] '$COMMENT'(";;           (@return \"Return value\")", 1546, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5984)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5984)
   Call: (270) [system] '$COMMENT'(";;           (@return \"Return value\")", 1546, 0)==[_19700, _19706]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5984)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5984)
   Call: (270) [system] is_list('$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5984)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5984)
   Call: (270) [system] string('$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5984)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5984)
   Call: (270) [system] compound('$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
   Exit: (270) [system] compound('$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _29902, _29904)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT', [";;           (@return \"Return value\")", 1546, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;           (@return \"Return value\")", 1546, 0], _33644)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@return \"Return value\")", 1546, 0], _33644)
   Call: (271) [apply] apply:maplist_([";;           (@return \"Return value\")", 1546, 0], _33644, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;           (@return \"Return value\")", 1546, 0], [_36462|_36464], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _36462)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _36462)
   Call: (273) [system] var(";;           (@return \"Return value\")")
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _36462)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", '$VAR'(_41108))
   Call: (273) [system] atom(";;           (@return \"Return value\")")
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _36462)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _36462)
   Call: (273) [system] ";;           (@return \"Return value\")"==true
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _36462)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _36462)
   Call: (273) [system] ";;           (@return \"Return value\")"==false
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _36462)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _36462)
   Call: (273) [system] ";;           (@return \"Return value\")"==[_50388, _50394]
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _36462)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _36462)
   Call: (273) [system] is_list(";;           (@return \"Return value\")")
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _36462)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _36462)
   Call: (273) [system] string(";;           (@return \"Return value\")")
   Exit: (273) [system] string(";;           (@return \"Return value\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _36462)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _36462)
   Call: (273) [system] compound(";;           (@return \"Return value\")")
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _36462)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _36462)
^  Call: (273) [user] symbol(";;           (@return \"Return value\")")
^  Unify: (273) [user] symbol(";;           (@return \"Return value\")")
   Call: (274) [system] atom(";;           (@return \"Return value\")")
   Fail: (274) [system] atom(";;           (@return \"Return value\")")
^  Fail: (273) [user] symbol(";;           (@return \"Return value\")")
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _36462)
   Call: (273) [system] ";;           (@return \"Return value\")"=_36462
   Exit: (273) [system] ";;           (@return \"Return value\")"=";;           (@return \"Return value\")"
^  Exit: (272) [user] mfix_vars1(";;           (@return \"Return value\")", ";;           (@return \"Return value\")")
   Call: (272) [apply] apply:maplist_([1546, 0], _36464, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1546, 0], [_74460|_74462], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1546, _74460)
^  Unify: (273) [user] mfix_vars1(1546, _74460)
   Call: (274) [system] var(1546)
^  Redo: (273) [user] mfix_vars1(1546, _74460)
^  Unify: (273) [user] mfix_vars1(1546, '$VAR'(_79106))
   Call: (274) [system] atom(1546)
^  Redo: (273) [user] mfix_vars1(1546, _74460)
^  Unify: (273) [user] mfix_vars1(1546, _74460)
   Call: (274) [system] 1546==true
^  Redo: (273) [user] mfix_vars1(1546, _74460)
^  Unify: (273) [user] mfix_vars1(1546, _74460)
   Call: (274) [system] 1546==false
^  Redo: (273) [user] mfix_vars1(1546, _74460)
^  Unify: (273) [user] mfix_vars1(1546, _74460)
   Call: (274) [system] 1546==[_88386, _88392]
^  Redo: (273) [user] mfix_vars1(1546, _74460)
^  Unify: (273) [user] mfix_vars1(1546, _74460)
   Call: (274) [system] is_list(1546)
^  Redo: (273) [user] mfix_vars1(1546, _74460)
^  Unify: (273) [user] mfix_vars1(1546, _74460)
   Call: (274) [system] string(1546)
^  Redo: (273) [user] mfix_vars1(1546, _74460)
^  Unify: (273) [user] mfix_vars1(1546, _74460)
   Call: (274) [system] compound(1546)
^  Redo: (273) [user] mfix_vars1(1546, _74460)
^  Unify: (273) [user] mfix_vars1(1546, _74460)
^  Call: (274) [user] symbol(1546)
^  Unify: (274) [user] symbol(1546)
   Call: (275) [system] atom(1546)
   Fail: (275) [system] atom(1546)
^  Fail: (274) [user] symbol(1546)
^  Redo: (273) [user] mfix_vars1(1546, _74460)
   Call: (274) [system] 1546=_74460
   Exit: (274) [system] 1546=1546
^  Exit: (273) [user] mfix_vars1(1546, 1546)
   Call: (273) [apply] apply:maplist_([0], _74462, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_108786|_108788], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _108786)
^  Unify: (274) [user] mfix_vars1(0, _108786)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _108786)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_113432))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _108786)
^  Unify: (274) [user] mfix_vars1(0, _108786)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _108786)
^  Unify: (274) [user] mfix_vars1(0, _108786)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _108786)
^  Unify: (274) [user] mfix_vars1(0, _108786)
   Call: (275) [system] 0==[_122712, _122718]
^  Redo: (274) [user] mfix_vars1(0, _108786)
^  Unify: (274) [user] mfix_vars1(0, _108786)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _108786)
^  Unify: (274) [user] mfix_vars1(0, _108786)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _108786)
^  Unify: (274) [user] mfix_vars1(0, _108786)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _108786)
^  Unify: (274) [user] mfix_vars1(0, _108786)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _108786)
   Call: (275) [system] 0=_108786
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _108788, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1546, 0], [1546, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;           (@return \"Return value\")", 1546, 0], [";;           (@return \"Return value\")", 1546, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@return \"Return value\")", 1546, 0], [";;           (@return \"Return value\")", 1546, 0])
   Call: (270) [system] compound_name_arguments(_5984, '$COMMENT', [";;           (@return \"Return value\")", 1546, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT', [";;           (@return \"Return value\")", 1546, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@return \"Return value\")", 1546, 0)\=@='$COMMENT'(";;           (@return \"Return value\")", 1546, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5970)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _158960))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _158960))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _158960))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _158960))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _158960)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _158960)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _164546))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _164546))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _164546)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _164546)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _164546)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@return \"Return value\")", 1546, 0)\=@='$COMMENT'(";;           (@return \"Return value\")", 1546, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _158960)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _186866))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _186866))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _186866)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _186866)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _186866)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@return \"Return value\")", 1546, 0)\=@='$COMMENT'(";;           (@return \"Return value\")", 1546, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0)))
   Call: (261) [system] '$COMMENT'(";;           (@return \"Return value\")", 1546, 0)\=@='$COMMENT'(";;           (@return \"Return value\")", 1546, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _215644, [], _215646)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _215644, [], _215646)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _215644, [], _215646)
   Call: (258) [system] atom('$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _215644, [], _215646)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _215644, [], _215646)
   Call: (258) [system] compound('$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
   Exit: (258) [system] compound('$COMMENT'(";;           (@return \"Return value\")", 1546, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), _224960, _224962)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT', [";;           (@return \"Return value\")", 1546, 0])
^  Call: (258) [user] subst_vars([";;           (@return \"Return value\")", 1546, 0], _226846, [], _215646)
^  Unify: (258) [user] subst_vars([";;           (@return \"Return value\")", 1546, 0], [";;           (@return \"Return value\")", 1546, 0], [], [])
   Call: (259) [system] var([";;           (@return \"Return value\")", 1546, 0])
^  Redo: (258) [user] subst_vars([";;           (@return \"Return value\")", 1546, 0], _226846, [], _215646)
^  Unify: (258) [user] subst_vars([";;           (@return \"Return value\")", 1546, 0], [_230582|_230584], [], _215646)
^  Call: (259) [user] subst_vars(";;           (@return \"Return value\")", _230582, [], _231522)
^  Unify: (259) [user] subst_vars(";;           (@return \"Return value\")", ";;           (@return \"Return value\")", [], [])
   Call: (260) [system] var(";;           (@return \"Return value\")")
^  Redo: (259) [user] subst_vars(";;           (@return \"Return value\")", _230582, [], _231522)
^  Unify: (259) [user] subst_vars(";;           (@return \"Return value\")", _230582, [], _231522)
   Call: (260) [system] atom(";;           (@return \"Return value\")")
^  Redo: (259) [user] subst_vars(";;           (@return \"Return value\")", _230582, [], _231522)
^  Unify: (259) [user] subst_vars(";;           (@return \"Return value\")", _230582, [], _231522)
   Call: (260) [system] compound(";;           (@return \"Return value\")")
^  Redo: (259) [user] subst_vars(";;           (@return \"Return value\")", _230582, [], _231522)
^  Unify: (259) [user] subst_vars(";;           (@return \"Return value\")", ";;           (@return \"Return value\")", [], [])
^  Exit: (259) [user] subst_vars(";;           (@return \"Return value\")", ";;           (@return \"Return value\")", [], [])
^  Call: (259) [user] subst_vars([1546, 0], _230584, [], _215646)
^  Unify: (259) [user] subst_vars([1546, 0], [1546, 0], [], [])
   Call: (260) [system] var([1546, 0])
^  Redo: (259) [user] subst_vars([1546, 0], _230584, [], _215646)
^  Unify: (259) [user] subst_vars([1546, 0], [_246454|_246456], [], _215646)
^  Call: (260) [user] subst_vars(1546, _246454, [], _247394)
^  Unify: (260) [user] subst_vars(1546, 1546, [], [])
   Call: (261) [system] var(1546)
^  Redo: (260) [user] subst_vars(1546, _246454, [], _247394)
^  Unify: (260) [user] subst_vars(1546, _246454, [], _247394)
   Call: (261) [system] atom(1546)
^  Redo: (260) [user] subst_vars(1546, _246454, [], _247394)
^  Unify: (260) [user] subst_vars(1546, _246454, [], _247394)
   Call: (261) [system] compound(1546)
^  Redo: (260) [user] subst_vars(1546, _246454, [], _247394)
^  Unify: (260) [user] subst_vars(1546, 1546, [], [])
^  Exit: (260) [user] subst_vars(1546, 1546, [], [])
^  Call: (260) [user] subst_vars([0], _246456, [], _215646)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _246456, [], _215646)
^  Unify: (260) [user] subst_vars([0], [_262326|_262328], [], _215646)
^  Call: (261) [user] subst_vars(0, _262326, [], _263266)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _262326, [], _263266)
^  Unify: (261) [user] subst_vars(0, _262326, [], _263266)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _262326, [], _263266)
^  Unify: (261) [user] subst_vars(0, _262326, [], _263266)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _262326, [], _263266)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _262328, [], _215646)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _262328, [], _215646)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1546, 0], [1546, 0], [], [])
^  Exit: (258) [user] subst_vars([";;           (@return \"Return value\")", 1546, 0], [";;           (@return \"Return value\")", 1546, 0], [], [])
   Call: (258) [system] compound_name_arguments(_215644, '$COMMENT', [";;           (@return \"Return value\")", 1546, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT', [";;           (@return \"Return value\")", 1546, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1546, 0), '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), [], [])
   Call: (257) [system] _285684=metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1546, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1547, 0, 55622, '$COMMENT'(";;         )", 1547, 0), '$stream_position'(55622, 1547, 0, 55656)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         )", 1547, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         )", 1547, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         )", 1547, 0), _338402))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         )", 1547, 0), _338402))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         )", 1547, 0), _338402)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         )", 1547, 0), _338402)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         )", 1547, 0), _338402)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         )", 1547, 0), _338402)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         )", 1547, 0), _344014))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         )", 1547, 0), _344014))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         )", 1547, 0), _344014))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         )", 1547, 0), _344014))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         )", 1547, 0), _344014)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         )", 1547, 0), _344014)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         )", 1547, 0), _349600))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         )", 1547, 0), _349600))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         )", 1547, 0), _349600)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         )", 1547, 0), _349600)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1547, 0), _349600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1547, 0), _349600)
   Call: (270) [system] var('$COMMENT'(";;         )", 1547, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1547, 0), _349600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1547, 0), '$VAR'(_357060))
   Call: (270) [system] atom('$COMMENT'(";;         )", 1547, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1547, 0), _349600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1547, 0), _349600)
   Call: (270) [system] '$COMMENT'(";;         )", 1547, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1547, 0), _349600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1547, 0), _349600)
   Call: (270) [system] '$COMMENT'(";;         )", 1547, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1547, 0), _349600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1547, 0), _349600)
   Call: (270) [system] '$COMMENT'(";;         )", 1547, 0)==[_366340, _366346]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1547, 0), _349600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1547, 0), _349600)
   Call: (270) [system] is_list('$COMMENT'(";;         )", 1547, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1547, 0), _349600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1547, 0), _349600)
   Call: (270) [system] string('$COMMENT'(";;         )", 1547, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1547, 0), _349600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1547, 0), _349600)
   Call: (270) [system] compound('$COMMENT'(";;         )", 1547, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         )", 1547, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         )", 1547, 0), _376542, _376544)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         )", 1547, 0), '$COMMENT', [";;         )", 1547, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         )", 1547, 0], _380284)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         )", 1547, 0], _380284)
   Call: (271) [apply] apply:maplist_([";;         )", 1547, 0], _380284, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         )", 1547, 0], [_383102|_383104], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         )", _383102)
^  Unify: (272) [user] mfix_vars1(";;         )", _383102)
   Call: (273) [system] var(";;         )")
^  Redo: (272) [user] mfix_vars1(";;         )", _383102)
^  Unify: (272) [user] mfix_vars1(";;         )", '$VAR'(_387748))
   Call: (273) [system] atom(";;         )")
^  Redo: (272) [user] mfix_vars1(";;         )", _383102)
^  Unify: (272) [user] mfix_vars1(";;         )", _383102)
   Call: (273) [system] ";;         )"==true
^  Redo: (272) [user] mfix_vars1(";;         )", _383102)
^  Unify: (272) [user] mfix_vars1(";;         )", _383102)
   Call: (273) [system] ";;         )"==false
^  Redo: (272) [user] mfix_vars1(";;         )", _383102)
^  Unify: (272) [user] mfix_vars1(";;         )", _383102)
   Call: (273) [system] ";;         )"==[_397028, _397034]
^  Redo: (272) [user] mfix_vars1(";;         )", _383102)
^  Unify: (272) [user] mfix_vars1(";;         )", _383102)
   Call: (273) [system] is_list(";;         )")
^  Redo: (272) [user] mfix_vars1(";;         )", _383102)
^  Unify: (272) [user] mfix_vars1(";;         )", _383102)
   Call: (273) [system] string(";;         )")
   Exit: (273) [system] string(";;         )")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         )", _383102)
^  Unify: (272) [user] mfix_vars1(";;         )", _383102)
   Call: (273) [system] compound(";;         )")
^  Redo: (272) [user] mfix_vars1(";;         )", _383102)
^  Unify: (272) [user] mfix_vars1(";;         )", _383102)
^  Call: (273) [user] symbol(";;         )")
^  Unify: (273) [user] symbol(";;         )")
   Call: (274) [system] atom(";;         )")
   Fail: (274) [system] atom(";;         )")
^  Fail: (273) [user] symbol(";;         )")
^  Redo: (272) [user] mfix_vars1(";;         )", _383102)
   Call: (273) [system] ";;         )"=_383102
   Exit: (273) [system] ";;         )"=";;         )"
^  Exit: (272) [user] mfix_vars1(";;         )", ";;         )")
   Call: (272) [apply] apply:maplist_([1547, 0], _383104, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1547, 0], [_421100|_421102], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1547, _421100)
^  Unify: (273) [user] mfix_vars1(1547, _421100)
   Call: (274) [system] var(1547)
^  Redo: (273) [user] mfix_vars1(1547, _421100)
^  Unify: (273) [user] mfix_vars1(1547, '$VAR'(_425746))
   Call: (274) [system] atom(1547)
^  Redo: (273) [user] mfix_vars1(1547, _421100)
^  Unify: (273) [user] mfix_vars1(1547, _421100)
   Call: (274) [system] 1547==true
^  Redo: (273) [user] mfix_vars1(1547, _421100)
^  Unify: (273) [user] mfix_vars1(1547, _421100)
   Call: (274) [system] 1547==false
^  Redo: (273) [user] mfix_vars1(1547, _421100)
^  Unify: (273) [user] mfix_vars1(1547, _421100)
   Call: (274) [system] 1547==[_435026, _435032]
^  Redo: (273) [user] mfix_vars1(1547, _421100)
^  Unify: (273) [user] mfix_vars1(1547, _421100)
   Call: (274) [system] is_list(1547)
^  Redo: (273) [user] mfix_vars1(1547, _421100)
^  Unify: (273) [user] mfix_vars1(1547, _421100)
   Call: (274) [system] string(1547)
^  Redo: (273) [user] mfix_vars1(1547, _421100)
^  Unify: (273) [user] mfix_vars1(1547, _421100)
   Call: (274) [system] compound(1547)
^  Redo: (273) [user] mfix_vars1(1547, _421100)
^  Unify: (273) [user] mfix_vars1(1547, _421100)
^  Call: (274) [user] symbol(1547)
^  Unify: (274) [user] symbol(1547)
   Call: (275) [system] atom(1547)
   Fail: (275) [system] atom(1547)
^  Fail: (274) [user] symbol(1547)
^  Redo: (273) [user] mfix_vars1(1547, _421100)
   Call: (274) [system] 1547=_421100
   Exit: (274) [system] 1547=1547
^  Exit: (273) [user] mfix_vars1(1547, 1547)
   Call: (273) [apply] apply:maplist_([0], _421102, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_455426|_455428], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _455426)
^  Unify: (274) [user] mfix_vars1(0, _455426)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _455426)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_460072))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _455426)
^  Unify: (274) [user] mfix_vars1(0, _455426)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _455426)
^  Unify: (274) [user] mfix_vars1(0, _455426)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _455426)
^  Unify: (274) [user] mfix_vars1(0, _455426)
   Call: (275) [system] 0==[_469352, _469358]
^  Redo: (274) [user] mfix_vars1(0, _455426)
^  Unify: (274) [user] mfix_vars1(0, _455426)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _455426)
^  Unify: (274) [user] mfix_vars1(0, _455426)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _455426)
^  Unify: (274) [user] mfix_vars1(0, _455426)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _455426)
^  Unify: (274) [user] mfix_vars1(0, _455426)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _455426)
   Call: (275) [system] 0=_455426
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _455428, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1547, 0], [1547, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         )", 1547, 0], [";;         )", 1547, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         )", 1547, 0], [";;         )", 1547, 0])
   Call: (270) [system] compound_name_arguments(_349600, '$COMMENT', [";;         )", 1547, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         )", 1547, 0), '$COMMENT', [";;         )", 1547, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0)))
   Call: (267) [system] '$COMMENT'(";;         )", 1547, 0)\=@='$COMMENT'(";;         )", 1547, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         )", 1547, 0), _344014)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         )", 1547, 0), _505600))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         )", 1547, 0), _505600))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         )", 1547, 0), _505600))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         )", 1547, 0), _505600))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         )", 1547, 0), _505600)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         )", 1547, 0), _505600)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         )", 1547, 0), _511186))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         )", 1547, 0), _511186))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         )", 1547, 0), _511186)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         )", 1547, 0), _511186)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         )", 1547, 0), _511186)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0)))
   Call: (267) [system] '$COMMENT'(";;         )", 1547, 0)\=@='$COMMENT'(";;         )", 1547, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         )", 1547, 0), _5966)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         )", 1547, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         )", 1547, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         )", 1547, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         )", 1547, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         )", 1547, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         )", 1547, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         )", 1547, 0), _15638))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         )", 1547, 0), _15638))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         )", 1547, 0), _15638)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         )", 1547, 0), _15638)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         )", 1547, 0), _15638)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0)))
   Call: (267) [system] '$COMMENT'(";;         )", 1547, 0)\=@='$COMMENT'(";;         )", 1547, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         )", 1547, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0)))
   Call: (261) [system] '$COMMENT'(";;         )", 1547, 0)\=@='$COMMENT'(";;         )", 1547, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         )", 1547, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         )", 1547, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         )", 1547, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         )", 1547, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         )", 1547, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         )", 1547, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         )", 1547, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         )", 1547, 0), _44416, [], _44418)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         )", 1547, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         )", 1547, 0), _44416, [], _44418)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         )", 1547, 0), _44416, [], _44418)
   Call: (258) [system] atom('$COMMENT'(";;         )", 1547, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         )", 1547, 0), _44416, [], _44418)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         )", 1547, 0), _44416, [], _44418)
   Call: (258) [system] compound('$COMMENT'(";;         )", 1547, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         )", 1547, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         )", 1547, 0), _53732, _53734)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         )", 1547, 0), '$COMMENT', [";;         )", 1547, 0])
^  Call: (258) [user] subst_vars([";;         )", 1547, 0], _55618, [], _44418)
^  Unify: (258) [user] subst_vars([";;         )", 1547, 0], [";;         )", 1547, 0], [], [])
   Call: (259) [system] var([";;         )", 1547, 0])
^  Redo: (258) [user] subst_vars([";;         )", 1547, 0], _55618, [], _44418)
^  Unify: (258) [user] subst_vars([";;         )", 1547, 0], [_59354|_59356], [], _44418)
^  Call: (259) [user] subst_vars(";;         )", _59354, [], _60294)
^  Unify: (259) [user] subst_vars(";;         )", ";;         )", [], [])
   Call: (260) [system] var(";;         )")
^  Redo: (259) [user] subst_vars(";;         )", _59354, [], _60294)
^  Unify: (259) [user] subst_vars(";;         )", _59354, [], _60294)
   Call: (260) [system] atom(";;         )")
^  Redo: (259) [user] subst_vars(";;         )", _59354, [], _60294)
^  Unify: (259) [user] subst_vars(";;         )", _59354, [], _60294)
   Call: (260) [system] compound(";;         )")
^  Redo: (259) [user] subst_vars(";;         )", _59354, [], _60294)
^  Unify: (259) [user] subst_vars(";;         )", ";;         )", [], [])
^  Exit: (259) [user] subst_vars(";;         )", ";;         )", [], [])
^  Call: (259) [user] subst_vars([1547, 0], _59356, [], _44418)
^  Unify: (259) [user] subst_vars([1547, 0], [1547, 0], [], [])
   Call: (260) [system] var([1547, 0])
^  Redo: (259) [user] subst_vars([1547, 0], _59356, [], _44418)
^  Unify: (259) [user] subst_vars([1547, 0], [_75226|_75228], [], _44418)
^  Call: (260) [user] subst_vars(1547, _75226, [], _76166)
^  Unify: (260) [user] subst_vars(1547, 1547, [], [])
   Call: (261) [system] var(1547)
^  Redo: (260) [user] subst_vars(1547, _75226, [], _76166)
^  Unify: (260) [user] subst_vars(1547, _75226, [], _76166)
   Call: (261) [system] atom(1547)
^  Redo: (260) [user] subst_vars(1547, _75226, [], _76166)
^  Unify: (260) [user] subst_vars(1547, _75226, [], _76166)
   Call: (261) [system] compound(1547)
^  Redo: (260) [user] subst_vars(1547, _75226, [], _76166)
^  Unify: (260) [user] subst_vars(1547, 1547, [], [])
^  Exit: (260) [user] subst_vars(1547, 1547, [], [])
^  Call: (260) [user] subst_vars([0], _75228, [], _44418)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _75228, [], _44418)
^  Unify: (260) [user] subst_vars([0], [_91098|_91100], [], _44418)
^  Call: (261) [user] subst_vars(0, _91098, [], _92038)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _91098, [], _92038)
^  Unify: (261) [user] subst_vars(0, _91098, [], _92038)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _91098, [], _92038)
^  Unify: (261) [user] subst_vars(0, _91098, [], _92038)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _91098, [], _92038)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _91100, [], _44418)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _91100, [], _44418)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1547, 0], [1547, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         )", 1547, 0], [";;         )", 1547, 0], [], [])
   Call: (258) [system] compound_name_arguments(_44416, '$COMMENT', [";;         )", 1547, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         )", 1547, 0), '$COMMENT', [";;         )", 1547, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         )", 1547, 0), '$COMMENT'(";;         )", 1547, 0), [], [])
   Call: (257) [system] _114456=metta_file_buffer(+, '$COMMENT'(";;         )", 1547, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         )", 1547, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         )", 1547, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         )", 1547, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         )", 1547, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         )", 1547, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         )", 1547, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         )", 1547, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         )", 1547, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1548, 0, 55635, '$COMMENT'(";;         ", 1548, 0), '$stream_position'(55635, 1548, 0, 55669)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         ", 1548, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         ", 1548, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         ", 1548, 0), _167174))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         ", 1548, 0), _167174))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         ", 1548, 0), _167174)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         ", 1548, 0), _167174)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         ", 1548, 0), _167174)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         ", 1548, 0), _167174)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         ", 1548, 0), _172786))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         ", 1548, 0), _172786))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         ", 1548, 0), _172786))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         ", 1548, 0), _172786))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         ", 1548, 0), _172786)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         ", 1548, 0), _172786)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         ", 1548, 0), _178372))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         ", 1548, 0), _178372))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         ", 1548, 0), _178372)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         ", 1548, 0), _178372)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         ", 1548, 0), _178372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         ", 1548, 0), _178372)
   Call: (270) [system] var('$COMMENT'(";;         ", 1548, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         ", 1548, 0), _178372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         ", 1548, 0), '$VAR'(_185832))
   Call: (270) [system] atom('$COMMENT'(";;         ", 1548, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         ", 1548, 0), _178372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         ", 1548, 0), _178372)
   Call: (270) [system] '$COMMENT'(";;         ", 1548, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         ", 1548, 0), _178372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         ", 1548, 0), _178372)
   Call: (270) [system] '$COMMENT'(";;         ", 1548, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         ", 1548, 0), _178372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         ", 1548, 0), _178372)
   Call: (270) [system] '$COMMENT'(";;         ", 1548, 0)==[_195112, _195118]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         ", 1548, 0), _178372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         ", 1548, 0), _178372)
   Call: (270) [system] is_list('$COMMENT'(";;         ", 1548, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         ", 1548, 0), _178372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         ", 1548, 0), _178372)
   Call: (270) [system] string('$COMMENT'(";;         ", 1548, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         ", 1548, 0), _178372)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         ", 1548, 0), _178372)
   Call: (270) [system] compound('$COMMENT'(";;         ", 1548, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         ", 1548, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         ", 1548, 0), _205314, _205316)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         ", 1548, 0), '$COMMENT', [";;         ", 1548, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         ", 1548, 0], _209056)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         ", 1548, 0], _209056)
   Call: (271) [apply] apply:maplist_([";;         ", 1548, 0], _209056, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         ", 1548, 0], [_211874|_211876], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         ", _211874)
^  Unify: (272) [user] mfix_vars1(";;         ", _211874)
   Call: (273) [system] var(";;         ")
^  Redo: (272) [user] mfix_vars1(";;         ", _211874)
^  Unify: (272) [user] mfix_vars1(";;         ", '$VAR'(_216520))
   Call: (273) [system] atom(";;         ")
^  Redo: (272) [user] mfix_vars1(";;         ", _211874)
^  Unify: (272) [user] mfix_vars1(";;         ", _211874)
   Call: (273) [system] ";;         "==true
^  Redo: (272) [user] mfix_vars1(";;         ", _211874)
^  Unify: (272) [user] mfix_vars1(";;         ", _211874)
   Call: (273) [system] ";;         "==false
^  Redo: (272) [user] mfix_vars1(";;         ", _211874)
^  Unify: (272) [user] mfix_vars1(";;         ", _211874)
   Call: (273) [system] ";;         "==[_225800, _225806]
^  Redo: (272) [user] mfix_vars1(";;         ", _211874)
^  Unify: (272) [user] mfix_vars1(";;         ", _211874)
   Call: (273) [system] is_list(";;         ")
^  Redo: (272) [user] mfix_vars1(";;         ", _211874)
^  Unify: (272) [user] mfix_vars1(";;         ", _211874)
   Call: (273) [system] string(";;         ")
   Exit: (273) [system] string(";;         ")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         ", _211874)
^  Unify: (272) [user] mfix_vars1(";;         ", _211874)
   Call: (273) [system] compound(";;         ")
^  Redo: (272) [user] mfix_vars1(";;         ", _211874)
^  Unify: (272) [user] mfix_vars1(";;         ", _211874)
^  Call: (273) [user] symbol(";;         ")
^  Unify: (273) [user] symbol(";;         ")
   Call: (274) [system] atom(";;         ")
   Fail: (274) [system] atom(";;         ")
^  Fail: (273) [user] symbol(";;         ")
^  Redo: (272) [user] mfix_vars1(";;         ", _211874)
   Call: (273) [system] ";;         "=_211874
   Exit: (273) [system] ";;         "=";;         "
^  Exit: (272) [user] mfix_vars1(";;         ", ";;         ")
   Call: (272) [apply] apply:maplist_([1548, 0], _211876, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1548, 0], [_249872|_249874], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1548, _249872)
^  Unify: (273) [user] mfix_vars1(1548, _249872)
   Call: (274) [system] var(1548)
^  Redo: (273) [user] mfix_vars1(1548, _249872)
^  Unify: (273) [user] mfix_vars1(1548, '$VAR'(_254518))
   Call: (274) [system] atom(1548)
^  Redo: (273) [user] mfix_vars1(1548, _249872)
^  Unify: (273) [user] mfix_vars1(1548, _249872)
   Call: (274) [system] 1548==true
^  Redo: (273) [user] mfix_vars1(1548, _249872)
^  Unify: (273) [user] mfix_vars1(1548, _249872)
   Call: (274) [system] 1548==false
^  Redo: (273) [user] mfix_vars1(1548, _249872)
^  Unify: (273) [user] mfix_vars1(1548, _249872)
   Call: (274) [system] 1548==[_263798, _263804]
^  Redo: (273) [user] mfix_vars1(1548, _249872)
^  Unify: (273) [user] mfix_vars1(1548, _249872)
   Call: (274) [system] is_list(1548)
^  Redo: (273) [user] mfix_vars1(1548, _249872)
^  Unify: (273) [user] mfix_vars1(1548, _249872)
   Call: (274) [system] string(1548)
^  Redo: (273) [user] mfix_vars1(1548, _249872)
^  Unify: (273) [user] mfix_vars1(1548, _249872)
   Call: (274) [system] compound(1548)
^  Redo: (273) [user] mfix_vars1(1548, _249872)
^  Unify: (273) [user] mfix_vars1(1548, _249872)
^  Call: (274) [user] symbol(1548)
^  Unify: (274) [user] symbol(1548)
   Call: (275) [system] atom(1548)
   Fail: (275) [system] atom(1548)
^  Fail: (274) [user] symbol(1548)
^  Redo: (273) [user] mfix_vars1(1548, _249872)
   Call: (274) [system] 1548=_249872
   Exit: (274) [system] 1548=1548
^  Exit: (273) [user] mfix_vars1(1548, 1548)
   Call: (273) [apply] apply:maplist_([0], _249874, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_284198|_284200], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _284198)
^  Unify: (274) [user] mfix_vars1(0, _284198)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _284198)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_288844))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _284198)
^  Unify: (274) [user] mfix_vars1(0, _284198)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _284198)
^  Unify: (274) [user] mfix_vars1(0, _284198)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _284198)
^  Unify: (274) [user] mfix_vars1(0, _284198)
   Call: (275) [system] 0==[_298124, _298130]
^  Redo: (274) [user] mfix_vars1(0, _284198)
^  Unify: (274) [user] mfix_vars1(0, _284198)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _284198)
^  Unify: (274) [user] mfix_vars1(0, _284198)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _284198)
^  Unify: (274) [user] mfix_vars1(0, _284198)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _284198)
^  Unify: (274) [user] mfix_vars1(0, _284198)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _284198)
   Call: (275) [system] 0=_284198
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _284200, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1548, 0], [1548, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         ", 1548, 0], [";;         ", 1548, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         ", 1548, 0], [";;         ", 1548, 0])
   Call: (270) [system] compound_name_arguments(_178372, '$COMMENT', [";;         ", 1548, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         ", 1548, 0), '$COMMENT', [";;         ", 1548, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0)))
   Call: (267) [system] '$COMMENT'(";;         ", 1548, 0)\=@='$COMMENT'(";;         ", 1548, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         ", 1548, 0), _172786)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         ", 1548, 0), _334372))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         ", 1548, 0), _334372))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         ", 1548, 0), _334372))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         ", 1548, 0), _334372))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         ", 1548, 0), _334372)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         ", 1548, 0), _334372)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         ", 1548, 0), _339958))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         ", 1548, 0), _339958))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         ", 1548, 0), _339958)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         ", 1548, 0), _339958)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         ", 1548, 0), _339958)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0)))
   Call: (267) [system] '$COMMENT'(";;         ", 1548, 0)\=@='$COMMENT'(";;         ", 1548, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         ", 1548, 0), _334372)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         ", 1548, 0), _167174))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         ", 1548, 0), _167174))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         ", 1548, 0), _167174))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         ", 1548, 0), _167174))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         ", 1548, 0), _167174)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         ", 1548, 0), _167174)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         ", 1548, 0), _362278))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         ", 1548, 0), _362278))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         ", 1548, 0), _362278)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         ", 1548, 0), _362278)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         ", 1548, 0), _362278)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0)))
   Call: (267) [system] '$COMMENT'(";;         ", 1548, 0)\=@='$COMMENT'(";;         ", 1548, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         ", 1548, 0), _167174)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0)))
   Call: (261) [system] '$COMMENT'(";;         ", 1548, 0)\=@='$COMMENT'(";;         ", 1548, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         ", 1548, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         ", 1548, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         ", 1548, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         ", 1548, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         ", 1548, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         ", 1548, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         ", 1548, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         ", 1548, 0), _391056, [], _391058)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         ", 1548, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         ", 1548, 0), _391056, [], _391058)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         ", 1548, 0), _391056, [], _391058)
   Call: (258) [system] atom('$COMMENT'(";;         ", 1548, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         ", 1548, 0), _391056, [], _391058)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         ", 1548, 0), _391056, [], _391058)
   Call: (258) [system] compound('$COMMENT'(";;         ", 1548, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         ", 1548, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         ", 1548, 0), _400372, _400374)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         ", 1548, 0), '$COMMENT', [";;         ", 1548, 0])
^  Call: (258) [user] subst_vars([";;         ", 1548, 0], _402258, [], _391058)
^  Unify: (258) [user] subst_vars([";;         ", 1548, 0], [";;         ", 1548, 0], [], [])
   Call: (259) [system] var([";;         ", 1548, 0])
^  Redo: (258) [user] subst_vars([";;         ", 1548, 0], _402258, [], _391058)
^  Unify: (258) [user] subst_vars([";;         ", 1548, 0], [_405994|_405996], [], _391058)
^  Call: (259) [user] subst_vars(";;         ", _405994, [], _406934)
^  Unify: (259) [user] subst_vars(";;         ", ";;         ", [], [])
   Call: (260) [system] var(";;         ")
^  Redo: (259) [user] subst_vars(";;         ", _405994, [], _406934)
^  Unify: (259) [user] subst_vars(";;         ", _405994, [], _406934)
   Call: (260) [system] atom(";;         ")
^  Redo: (259) [user] subst_vars(";;         ", _405994, [], _406934)
^  Unify: (259) [user] subst_vars(";;         ", _405994, [], _406934)
   Call: (260) [system] compound(";;         ")
^  Redo: (259) [user] subst_vars(";;         ", _405994, [], _406934)
^  Unify: (259) [user] subst_vars(";;         ", ";;         ", [], [])
^  Exit: (259) [user] subst_vars(";;         ", ";;         ", [], [])
^  Call: (259) [user] subst_vars([1548, 0], _405996, [], _391058)
^  Unify: (259) [user] subst_vars([1548, 0], [1548, 0], [], [])
   Call: (260) [system] var([1548, 0])
^  Redo: (259) [user] subst_vars([1548, 0], _405996, [], _391058)
^  Unify: (259) [user] subst_vars([1548, 0], [_421866|_421868], [], _391058)
^  Call: (260) [user] subst_vars(1548, _421866, [], _422806)
^  Unify: (260) [user] subst_vars(1548, 1548, [], [])
   Call: (261) [system] var(1548)
^  Redo: (260) [user] subst_vars(1548, _421866, [], _422806)
^  Unify: (260) [user] subst_vars(1548, _421866, [], _422806)
   Call: (261) [system] atom(1548)
^  Redo: (260) [user] subst_vars(1548, _421866, [], _422806)
^  Unify: (260) [user] subst_vars(1548, _421866, [], _422806)
   Call: (261) [system] compound(1548)
^  Redo: (260) [user] subst_vars(1548, _421866, [], _422806)
^  Unify: (260) [user] subst_vars(1548, 1548, [], [])
^  Exit: (260) [user] subst_vars(1548, 1548, [], [])
^  Call: (260) [user] subst_vars([0], _421868, [], _391058)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _421868, [], _391058)
^  Unify: (260) [user] subst_vars([0], [_437738|_437740], [], _391058)
^  Call: (261) [user] subst_vars(0, _437738, [], _438678)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _437738, [], _438678)
^  Unify: (261) [user] subst_vars(0, _437738, [], _438678)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _437738, [], _438678)
^  Unify: (261) [user] subst_vars(0, _437738, [], _438678)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _437738, [], _438678)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _437740, [], _391058)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _437740, [], _391058)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1548, 0], [1548, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         ", 1548, 0], [";;         ", 1548, 0], [], [])
   Call: (258) [system] compound_name_arguments(_391056, '$COMMENT', [";;         ", 1548, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         ", 1548, 0), '$COMMENT', [";;         ", 1548, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         ", 1548, 0), '$COMMENT'(";;         ", 1548, 0), [], [])
   Call: (257) [system] _461096=metta_file_buffer(+, '$COMMENT'(";;         ", 1548, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         ", 1548, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         ", 1548, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         ", 1548, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         ", 1548, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         ", 1548, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         ", 1548, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         ", 1548, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         ", 1548, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1549, 0, 55647, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$stream_position'(55647, 1549, 0, 55681)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _513820))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _513820))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _513820)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _513820)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _513820)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _513820)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _519432))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _519432))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _519432))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _519432))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _519432)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _5970)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _6872))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _6872))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _6872)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _6872)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _6872)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _6872)
   Call: (270) [system] var('$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _6872)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$VAR'(_14332))
   Call: (270) [system] atom('$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _6872)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _6872)
   Call: (270) [system] '$COMMENT'(";;         !(get-doc some-func)", 1549, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _6872)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _6872)
   Call: (270) [system] '$COMMENT'(";;         !(get-doc some-func)", 1549, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _6872)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _6872)
   Call: (270) [system] '$COMMENT'(";;         !(get-doc some-func)", 1549, 0)==[_23612, _23618]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _6872)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _6872)
   Call: (270) [system] is_list('$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _6872)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _6872)
   Call: (270) [system] string('$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _6872)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _6872)
   Call: (270) [system] compound('$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _33814, _33816)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT', [";;         !(get-doc some-func)", 1549, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         !(get-doc some-func)", 1549, 0], _37556)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(get-doc some-func)", 1549, 0], _37556)
   Call: (271) [apply] apply:maplist_([";;         !(get-doc some-func)", 1549, 0], _37556, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         !(get-doc some-func)", 1549, 0], [_40374|_40376], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         !(get-doc some-func)", _40374)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-func)", _40374)
   Call: (273) [system] var(";;         !(get-doc some-func)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-func)", _40374)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-func)", '$VAR'(_45020))
   Call: (273) [system] atom(";;         !(get-doc some-func)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-func)", _40374)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-func)", _40374)
   Call: (273) [system] ";;         !(get-doc some-func)"==true
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-func)", _40374)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-func)", _40374)
   Call: (273) [system] ";;         !(get-doc some-func)"==false
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-func)", _40374)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-func)", _40374)
   Call: (273) [system] ";;         !(get-doc some-func)"==[_54300, _54306]
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-func)", _40374)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-func)", _40374)
   Call: (273) [system] is_list(";;         !(get-doc some-func)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-func)", _40374)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-func)", _40374)
   Call: (273) [system] string(";;         !(get-doc some-func)")
   Exit: (273) [system] string(";;         !(get-doc some-func)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-func)", _40374)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-func)", _40374)
   Call: (273) [system] compound(";;         !(get-doc some-func)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-func)", _40374)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-func)", _40374)
^  Call: (273) [user] symbol(";;         !(get-doc some-func)")
^  Unify: (273) [user] symbol(";;         !(get-doc some-func)")
   Call: (274) [system] atom(";;         !(get-doc some-func)")
   Fail: (274) [system] atom(";;         !(get-doc some-func)")
^  Fail: (273) [user] symbol(";;         !(get-doc some-func)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-func)", _40374)
   Call: (273) [system] ";;         !(get-doc some-func)"=_40374
   Exit: (273) [system] ";;         !(get-doc some-func)"=";;         !(get-doc some-func)"
^  Exit: (272) [user] mfix_vars1(";;         !(get-doc some-func)", ";;         !(get-doc some-func)")
   Call: (272) [apply] apply:maplist_([1549, 0], _40376, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1549, 0], [_78372|_78374], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1549, _78372)
^  Unify: (273) [user] mfix_vars1(1549, _78372)
   Call: (274) [system] var(1549)
^  Redo: (273) [user] mfix_vars1(1549, _78372)
^  Unify: (273) [user] mfix_vars1(1549, '$VAR'(_83018))
   Call: (274) [system] atom(1549)
^  Redo: (273) [user] mfix_vars1(1549, _78372)
^  Unify: (273) [user] mfix_vars1(1549, _78372)
   Call: (274) [system] 1549==true
^  Redo: (273) [user] mfix_vars1(1549, _78372)
^  Unify: (273) [user] mfix_vars1(1549, _78372)
   Call: (274) [system] 1549==false
^  Redo: (273) [user] mfix_vars1(1549, _78372)
^  Unify: (273) [user] mfix_vars1(1549, _78372)
   Call: (274) [system] 1549==[_92298, _92304]
^  Redo: (273) [user] mfix_vars1(1549, _78372)
^  Unify: (273) [user] mfix_vars1(1549, _78372)
   Call: (274) [system] is_list(1549)
^  Redo: (273) [user] mfix_vars1(1549, _78372)
^  Unify: (273) [user] mfix_vars1(1549, _78372)
   Call: (274) [system] string(1549)
^  Redo: (273) [user] mfix_vars1(1549, _78372)
^  Unify: (273) [user] mfix_vars1(1549, _78372)
   Call: (274) [system] compound(1549)
^  Redo: (273) [user] mfix_vars1(1549, _78372)
^  Unify: (273) [user] mfix_vars1(1549, _78372)
^  Call: (274) [user] symbol(1549)
^  Unify: (274) [user] symbol(1549)
   Call: (275) [system] atom(1549)
   Fail: (275) [system] atom(1549)
^  Fail: (274) [user] symbol(1549)
^  Redo: (273) [user] mfix_vars1(1549, _78372)
   Call: (274) [system] 1549=_78372
   Exit: (274) [system] 1549=1549
^  Exit: (273) [user] mfix_vars1(1549, 1549)
   Call: (273) [apply] apply:maplist_([0], _78374, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_112698|_112700], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _112698)
^  Unify: (274) [user] mfix_vars1(0, _112698)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _112698)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_117344))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _112698)
^  Unify: (274) [user] mfix_vars1(0, _112698)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _112698)
^  Unify: (274) [user] mfix_vars1(0, _112698)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _112698)
^  Unify: (274) [user] mfix_vars1(0, _112698)
   Call: (275) [system] 0==[_126624, _126630]
^  Redo: (274) [user] mfix_vars1(0, _112698)
^  Unify: (274) [user] mfix_vars1(0, _112698)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _112698)
^  Unify: (274) [user] mfix_vars1(0, _112698)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _112698)
^  Unify: (274) [user] mfix_vars1(0, _112698)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _112698)
^  Unify: (274) [user] mfix_vars1(0, _112698)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _112698)
   Call: (275) [system] 0=_112698
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _112700, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1549, 0], [1549, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         !(get-doc some-func)", 1549, 0], [";;         !(get-doc some-func)", 1549, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(get-doc some-func)", 1549, 0], [";;         !(get-doc some-func)", 1549, 0])
   Call: (270) [system] compound_name_arguments(_6872, '$COMMENT', [";;         !(get-doc some-func)", 1549, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT', [";;         !(get-doc some-func)", 1549, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-doc some-func)", 1549, 0)\=@='$COMMENT'(";;         !(get-doc some-func)", 1549, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _5970)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _162872))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _162872))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _162872))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _162872))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _162872)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _162872)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _168458))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _168458))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _168458)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _168458)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _168458)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-doc some-func)", 1549, 0)\=@='$COMMENT'(";;         !(get-doc some-func)", 1549, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _162872)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _190778))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _190778))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _190778)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _190778)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _190778)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-doc some-func)", 1549, 0)\=@='$COMMENT'(";;         !(get-doc some-func)", 1549, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0)))
   Call: (261) [system] '$COMMENT'(";;         !(get-doc some-func)", 1549, 0)\=@='$COMMENT'(";;         !(get-doc some-func)", 1549, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _219556, [], _219558)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _219556, [], _219558)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _219556, [], _219558)
   Call: (258) [system] atom('$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _219556, [], _219558)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _219556, [], _219558)
   Call: (258) [system] compound('$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         !(get-doc some-func)", 1549, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), _228872, _228874)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT', [";;         !(get-doc some-func)", 1549, 0])
^  Call: (258) [user] subst_vars([";;         !(get-doc some-func)", 1549, 0], _230758, [], _219558)
^  Unify: (258) [user] subst_vars([";;         !(get-doc some-func)", 1549, 0], [";;         !(get-doc some-func)", 1549, 0], [], [])
   Call: (259) [system] var([";;         !(get-doc some-func)", 1549, 0])
^  Redo: (258) [user] subst_vars([";;         !(get-doc some-func)", 1549, 0], _230758, [], _219558)
^  Unify: (258) [user] subst_vars([";;         !(get-doc some-func)", 1549, 0], [_234494|_234496], [], _219558)
^  Call: (259) [user] subst_vars(";;         !(get-doc some-func)", _234494, [], _235434)
^  Unify: (259) [user] subst_vars(";;         !(get-doc some-func)", ";;         !(get-doc some-func)", [], [])
   Call: (260) [system] var(";;         !(get-doc some-func)")
^  Redo: (259) [user] subst_vars(";;         !(get-doc some-func)", _234494, [], _235434)
^  Unify: (259) [user] subst_vars(";;         !(get-doc some-func)", _234494, [], _235434)
   Call: (260) [system] atom(";;         !(get-doc some-func)")
^  Redo: (259) [user] subst_vars(";;         !(get-doc some-func)", _234494, [], _235434)
^  Unify: (259) [user] subst_vars(";;         !(get-doc some-func)", _234494, [], _235434)
   Call: (260) [system] compound(";;         !(get-doc some-func)")
^  Redo: (259) [user] subst_vars(";;         !(get-doc some-func)", _234494, [], _235434)
^  Unify: (259) [user] subst_vars(";;         !(get-doc some-func)", ";;         !(get-doc some-func)", [], [])
^  Exit: (259) [user] subst_vars(";;         !(get-doc some-func)", ";;         !(get-doc some-func)", [], [])
^  Call: (259) [user] subst_vars([1549, 0], _234496, [], _219558)
^  Unify: (259) [user] subst_vars([1549, 0], [1549, 0], [], [])
   Call: (260) [system] var([1549, 0])
^  Redo: (259) [user] subst_vars([1549, 0], _234496, [], _219558)
^  Unify: (259) [user] subst_vars([1549, 0], [_250366|_250368], [], _219558)
^  Call: (260) [user] subst_vars(1549, _250366, [], _251306)
^  Unify: (260) [user] subst_vars(1549, 1549, [], [])
   Call: (261) [system] var(1549)
^  Redo: (260) [user] subst_vars(1549, _250366, [], _251306)
^  Unify: (260) [user] subst_vars(1549, _250366, [], _251306)
   Call: (261) [system] atom(1549)
^  Redo: (260) [user] subst_vars(1549, _250366, [], _251306)
^  Unify: (260) [user] subst_vars(1549, _250366, [], _251306)
   Call: (261) [system] compound(1549)
^  Redo: (260) [user] subst_vars(1549, _250366, [], _251306)
^  Unify: (260) [user] subst_vars(1549, 1549, [], [])
^  Exit: (260) [user] subst_vars(1549, 1549, [], [])
^  Call: (260) [user] subst_vars([0], _250368, [], _219558)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _250368, [], _219558)
^  Unify: (260) [user] subst_vars([0], [_266238|_266240], [], _219558)
^  Call: (261) [user] subst_vars(0, _266238, [], _267178)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _266238, [], _267178)
^  Unify: (261) [user] subst_vars(0, _266238, [], _267178)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _266238, [], _267178)
^  Unify: (261) [user] subst_vars(0, _266238, [], _267178)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _266238, [], _267178)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _266240, [], _219558)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _266240, [], _219558)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1549, 0], [1549, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         !(get-doc some-func)", 1549, 0], [";;         !(get-doc some-func)", 1549, 0], [], [])
   Call: (258) [system] compound_name_arguments(_219556, '$COMMENT', [";;         !(get-doc some-func)", 1549, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT', [";;         !(get-doc some-func)", 1549, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc some-func)", 1549, 0), '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), [], [])
   Call: (257) [system] _289596=metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-func)", 1549, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1550, 0, 55679, '$COMMENT'(";;     \"#);", 1550, 0), '$stream_position'(55679, 1550, 0, 55713)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1550, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1550, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1550, 0), _342314))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1550, 0), _342314))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1550, 0), _342314)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     \"#);", 1550, 0), _342314)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     \"#);", 1550, 0), _342314)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     \"#);", 1550, 0), _342314)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1550, 0), _347926))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1550, 0), _347926))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1550, 0), _347926))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1550, 0), _347926))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1550, 0), _347926)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1550, 0), _347926)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     \"#);", 1550, 0), _353512))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     \"#);", 1550, 0), _353512))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     \"#);", 1550, 0), _353512)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     \"#);", 1550, 0), _353512)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1550, 0), _353512)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1550, 0), _353512)
   Call: (270) [system] var('$COMMENT'(";;     \"#);", 1550, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1550, 0), _353512)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1550, 0), '$VAR'(_360972))
   Call: (270) [system] atom('$COMMENT'(";;     \"#);", 1550, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1550, 0), _353512)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1550, 0), _353512)
   Call: (270) [system] '$COMMENT'(";;     \"#);", 1550, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1550, 0), _353512)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1550, 0), _353512)
   Call: (270) [system] '$COMMENT'(";;     \"#);", 1550, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1550, 0), _353512)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1550, 0), _353512)
   Call: (270) [system] '$COMMENT'(";;     \"#);", 1550, 0)==[_370252, _370258]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1550, 0), _353512)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1550, 0), _353512)
   Call: (270) [system] is_list('$COMMENT'(";;     \"#);", 1550, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1550, 0), _353512)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1550, 0), _353512)
   Call: (270) [system] string('$COMMENT'(";;     \"#);", 1550, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1550, 0), _353512)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1550, 0), _353512)
   Call: (270) [system] compound('$COMMENT'(";;     \"#);", 1550, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     \"#);", 1550, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1550, 0), _380454, _380456)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT', [";;     \"#);", 1550, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     \"#);", 1550, 0], _384196)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     \"#);", 1550, 0], _384196)
   Call: (271) [apply] apply:maplist_([";;     \"#);", 1550, 0], _384196, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     \"#);", 1550, 0], [_387014|_387016], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     \"#);", _387014)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _387014)
   Call: (273) [system] var(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _387014)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", '$VAR'(_391660))
   Call: (273) [system] atom(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _387014)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _387014)
   Call: (273) [system] ";;     \"#);"==true
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _387014)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _387014)
   Call: (273) [system] ";;     \"#);"==false
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _387014)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _387014)
   Call: (273) [system] ";;     \"#);"==[_400940, _400946]
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _387014)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _387014)
   Call: (273) [system] is_list(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _387014)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _387014)
   Call: (273) [system] string(";;     \"#);")
   Exit: (273) [system] string(";;     \"#);")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _387014)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _387014)
   Call: (273) [system] compound(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _387014)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _387014)
^  Call: (273) [user] symbol(";;     \"#);")
^  Unify: (273) [user] symbol(";;     \"#);")
   Call: (274) [system] atom(";;     \"#);")
   Fail: (274) [system] atom(";;     \"#);")
^  Fail: (273) [user] symbol(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _387014)
   Call: (273) [system] ";;     \"#);"=_387014
   Exit: (273) [system] ";;     \"#);"=";;     \"#);"
^  Exit: (272) [user] mfix_vars1(";;     \"#);", ";;     \"#);")
   Call: (272) [apply] apply:maplist_([1550, 0], _387016, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1550, 0], [_425012|_425014], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1550, _425012)
^  Unify: (273) [user] mfix_vars1(1550, _425012)
   Call: (274) [system] var(1550)
^  Redo: (273) [user] mfix_vars1(1550, _425012)
^  Unify: (273) [user] mfix_vars1(1550, '$VAR'(_429658))
   Call: (274) [system] atom(1550)
^  Redo: (273) [user] mfix_vars1(1550, _425012)
^  Unify: (273) [user] mfix_vars1(1550, _425012)
   Call: (274) [system] 1550==true
^  Redo: (273) [user] mfix_vars1(1550, _425012)
^  Unify: (273) [user] mfix_vars1(1550, _425012)
   Call: (274) [system] 1550==false
^  Redo: (273) [user] mfix_vars1(1550, _425012)
^  Unify: (273) [user] mfix_vars1(1550, _425012)
   Call: (274) [system] 1550==[_438938, _438944]
^  Redo: (273) [user] mfix_vars1(1550, _425012)
^  Unify: (273) [user] mfix_vars1(1550, _425012)
   Call: (274) [system] is_list(1550)
^  Redo: (273) [user] mfix_vars1(1550, _425012)
^  Unify: (273) [user] mfix_vars1(1550, _425012)
   Call: (274) [system] string(1550)
^  Redo: (273) [user] mfix_vars1(1550, _425012)
^  Unify: (273) [user] mfix_vars1(1550, _425012)
   Call: (274) [system] compound(1550)
^  Redo: (273) [user] mfix_vars1(1550, _425012)
^  Unify: (273) [user] mfix_vars1(1550, _425012)
^  Call: (274) [user] symbol(1550)
^  Unify: (274) [user] symbol(1550)
   Call: (275) [system] atom(1550)
   Fail: (275) [system] atom(1550)
^  Fail: (274) [user] symbol(1550)
^  Redo: (273) [user] mfix_vars1(1550, _425012)
   Call: (274) [system] 1550=_425012
   Exit: (274) [system] 1550=1550
^  Exit: (273) [user] mfix_vars1(1550, 1550)
   Call: (273) [apply] apply:maplist_([0], _425014, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_459338|_459340], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _459338)
^  Unify: (274) [user] mfix_vars1(0, _459338)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _459338)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_463984))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _459338)
^  Unify: (274) [user] mfix_vars1(0, _459338)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _459338)
^  Unify: (274) [user] mfix_vars1(0, _459338)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _459338)
^  Unify: (274) [user] mfix_vars1(0, _459338)
   Call: (275) [system] 0==[_473264, _473270]
^  Redo: (274) [user] mfix_vars1(0, _459338)
^  Unify: (274) [user] mfix_vars1(0, _459338)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _459338)
^  Unify: (274) [user] mfix_vars1(0, _459338)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _459338)
^  Unify: (274) [user] mfix_vars1(0, _459338)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _459338)
^  Unify: (274) [user] mfix_vars1(0, _459338)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _459338)
   Call: (275) [system] 0=_459338
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _459340, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1550, 0], [1550, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     \"#);", 1550, 0], [";;     \"#);", 1550, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     \"#);", 1550, 0], [";;     \"#);", 1550, 0])
   Call: (270) [system] compound_name_arguments(_353512, '$COMMENT', [";;     \"#);", 1550, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT', [";;     \"#);", 1550, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0)))
   Call: (267) [system] '$COMMENT'(";;     \"#);", 1550, 0)\=@='$COMMENT'(";;     \"#);", 1550, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1550, 0), _347926)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     \"#);", 1550, 0), _509512))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1550, 0), _509512))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1550, 0), _509512))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1550, 0), _509512))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1550, 0), _509512)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1550, 0), _509512)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     \"#);", 1550, 0), _515098))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     \"#);", 1550, 0), _515098))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     \"#);", 1550, 0), _515098)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     \"#);", 1550, 0), _515098)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     \"#);", 1550, 0), _515098)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0)))
   Call: (267) [system] '$COMMENT'(";;     \"#);", 1550, 0)\=@='$COMMENT'(";;     \"#);", 1550, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1550, 0), _5966)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     \"#);", 1550, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1550, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1550, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1550, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1550, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1550, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     \"#);", 1550, 0), _19462))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     \"#);", 1550, 0), _19462))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     \"#);", 1550, 0), _19462)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     \"#);", 1550, 0), _19462)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     \"#);", 1550, 0), _19462)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0)))
   Call: (267) [system] '$COMMENT'(";;     \"#);", 1550, 0)\=@='$COMMENT'(";;     \"#);", 1550, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1550, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0)))
   Call: (261) [system] '$COMMENT'(";;     \"#);", 1550, 0)\=@='$COMMENT'(";;     \"#);", 1550, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1550, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1550, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1550, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1550, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1550, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1550, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1550, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1550, 0), _48240, [], _48242)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     \"#);", 1550, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1550, 0), _48240, [], _48242)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1550, 0), _48240, [], _48242)
   Call: (258) [system] atom('$COMMENT'(";;     \"#);", 1550, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1550, 0), _48240, [], _48242)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1550, 0), _48240, [], _48242)
   Call: (258) [system] compound('$COMMENT'(";;     \"#);", 1550, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     \"#);", 1550, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1550, 0), _57556, _57558)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT', [";;     \"#);", 1550, 0])
^  Call: (258) [user] subst_vars([";;     \"#);", 1550, 0], _59442, [], _48242)
^  Unify: (258) [user] subst_vars([";;     \"#);", 1550, 0], [";;     \"#);", 1550, 0], [], [])
   Call: (259) [system] var([";;     \"#);", 1550, 0])
^  Redo: (258) [user] subst_vars([";;     \"#);", 1550, 0], _59442, [], _48242)
^  Unify: (258) [user] subst_vars([";;     \"#);", 1550, 0], [_63178|_63180], [], _48242)
^  Call: (259) [user] subst_vars(";;     \"#);", _63178, [], _64118)
^  Unify: (259) [user] subst_vars(";;     \"#);", ";;     \"#);", [], [])
   Call: (260) [system] var(";;     \"#);")
^  Redo: (259) [user] subst_vars(";;     \"#);", _63178, [], _64118)
^  Unify: (259) [user] subst_vars(";;     \"#);", _63178, [], _64118)
   Call: (260) [system] atom(";;     \"#);")
^  Redo: (259) [user] subst_vars(";;     \"#);", _63178, [], _64118)
^  Unify: (259) [user] subst_vars(";;     \"#);", _63178, [], _64118)
   Call: (260) [system] compound(";;     \"#);")
^  Redo: (259) [user] subst_vars(";;     \"#);", _63178, [], _64118)
^  Unify: (259) [user] subst_vars(";;     \"#);", ";;     \"#);", [], [])
^  Exit: (259) [user] subst_vars(";;     \"#);", ";;     \"#);", [], [])
^  Call: (259) [user] subst_vars([1550, 0], _63180, [], _48242)
^  Unify: (259) [user] subst_vars([1550, 0], [1550, 0], [], [])
   Call: (260) [system] var([1550, 0])
^  Redo: (259) [user] subst_vars([1550, 0], _63180, [], _48242)
^  Unify: (259) [user] subst_vars([1550, 0], [_79050|_79052], [], _48242)
^  Call: (260) [user] subst_vars(1550, _79050, [], _79990)
^  Unify: (260) [user] subst_vars(1550, 1550, [], [])
   Call: (261) [system] var(1550)
^  Redo: (260) [user] subst_vars(1550, _79050, [], _79990)
^  Unify: (260) [user] subst_vars(1550, _79050, [], _79990)
   Call: (261) [system] atom(1550)
^  Redo: (260) [user] subst_vars(1550, _79050, [], _79990)
^  Unify: (260) [user] subst_vars(1550, _79050, [], _79990)
   Call: (261) [system] compound(1550)
^  Redo: (260) [user] subst_vars(1550, _79050, [], _79990)
^  Unify: (260) [user] subst_vars(1550, 1550, [], [])
^  Exit: (260) [user] subst_vars(1550, 1550, [], [])
^  Call: (260) [user] subst_vars([0], _79052, [], _48242)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _79052, [], _48242)
^  Unify: (260) [user] subst_vars([0], [_94922|_94924], [], _48242)
^  Call: (261) [user] subst_vars(0, _94922, [], _95862)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _94922, [], _95862)
^  Unify: (261) [user] subst_vars(0, _94922, [], _95862)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _94922, [], _95862)
^  Unify: (261) [user] subst_vars(0, _94922, [], _95862)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _94922, [], _95862)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _94924, [], _48242)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _94924, [], _48242)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1550, 0], [1550, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     \"#);", 1550, 0], [";;     \"#);", 1550, 0], [], [])
   Call: (258) [system] compound_name_arguments(_48240, '$COMMENT', [";;     \"#);", 1550, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT', [";;     \"#);", 1550, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1550, 0), '$COMMENT'(";;     \"#);", 1550, 0), [], [])
   Call: (257) [system] _118280=metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1550, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1550, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1550, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1550, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1550, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1550, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1550, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1550, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1550, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1551, 0, 55691, '$COMMENT'(";;", 1551, 0), '$stream_position'(55691, 1551, 0, 55725)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1551, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1551, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1551, 0), _170996))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1551, 0), _170996))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1551, 0), _170996)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1551, 0), _170996)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1551, 0), _170996)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1551, 0), _170996)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1551, 0), _176608))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1551, 0), _176608))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1551, 0), _176608))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1551, 0), _176608))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1551, 0), _176608)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1551, 0), _176608)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1551, 0), _182194))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1551, 0), _182194))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1551, 0), _182194)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1551, 0), _182194)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1551, 0), _182194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1551, 0), _182194)
   Call: (270) [system] var('$COMMENT'(";;", 1551, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1551, 0), _182194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1551, 0), '$VAR'(_189654))
   Call: (270) [system] atom('$COMMENT'(";;", 1551, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1551, 0), _182194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1551, 0), _182194)
   Call: (270) [system] '$COMMENT'(";;", 1551, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1551, 0), _182194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1551, 0), _182194)
   Call: (270) [system] '$COMMENT'(";;", 1551, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1551, 0), _182194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1551, 0), _182194)
   Call: (270) [system] '$COMMENT'(";;", 1551, 0)==[_198934, _198940]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1551, 0), _182194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1551, 0), _182194)
   Call: (270) [system] is_list('$COMMENT'(";;", 1551, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1551, 0), _182194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1551, 0), _182194)
   Call: (270) [system] string('$COMMENT'(";;", 1551, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1551, 0), _182194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1551, 0), _182194)
   Call: (270) [system] compound('$COMMENT'(";;", 1551, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1551, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1551, 0), _209136, _209138)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1551, 0), '$COMMENT', [";;", 1551, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1551, 0], _212878)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1551, 0], _212878)
   Call: (271) [apply] apply:maplist_([";;", 1551, 0], _212878, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1551, 0], [_215696|_215698], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _215696)
^  Unify: (272) [user] mfix_vars1(";;", _215696)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _215696)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_220342))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _215696)
^  Unify: (272) [user] mfix_vars1(";;", _215696)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _215696)
^  Unify: (272) [user] mfix_vars1(";;", _215696)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _215696)
^  Unify: (272) [user] mfix_vars1(";;", _215696)
   Call: (273) [system] ";;"==[_229622, _229628]
^  Redo: (272) [user] mfix_vars1(";;", _215696)
^  Unify: (272) [user] mfix_vars1(";;", _215696)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _215696)
^  Unify: (272) [user] mfix_vars1(";;", _215696)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _215696)
^  Unify: (272) [user] mfix_vars1(";;", _215696)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _215696)
^  Unify: (272) [user] mfix_vars1(";;", _215696)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _215696)
   Call: (273) [system] ";;"=_215696
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1551, 0], _215698, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1551, 0], [_253694|_253696], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1551, _253694)
^  Unify: (273) [user] mfix_vars1(1551, _253694)
   Call: (274) [system] var(1551)
^  Redo: (273) [user] mfix_vars1(1551, _253694)
^  Unify: (273) [user] mfix_vars1(1551, '$VAR'(_258340))
   Call: (274) [system] atom(1551)
^  Redo: (273) [user] mfix_vars1(1551, _253694)
^  Unify: (273) [user] mfix_vars1(1551, _253694)
   Call: (274) [system] 1551==true
^  Redo: (273) [user] mfix_vars1(1551, _253694)
^  Unify: (273) [user] mfix_vars1(1551, _253694)
   Call: (274) [system] 1551==false
^  Redo: (273) [user] mfix_vars1(1551, _253694)
^  Unify: (273) [user] mfix_vars1(1551, _253694)
   Call: (274) [system] 1551==[_267620, _267626]
^  Redo: (273) [user] mfix_vars1(1551, _253694)
^  Unify: (273) [user] mfix_vars1(1551, _253694)
   Call: (274) [system] is_list(1551)
^  Redo: (273) [user] mfix_vars1(1551, _253694)
^  Unify: (273) [user] mfix_vars1(1551, _253694)
   Call: (274) [system] string(1551)
^  Redo: (273) [user] mfix_vars1(1551, _253694)
^  Unify: (273) [user] mfix_vars1(1551, _253694)
   Call: (274) [system] compound(1551)
^  Redo: (273) [user] mfix_vars1(1551, _253694)
^  Unify: (273) [user] mfix_vars1(1551, _253694)
^  Call: (274) [user] symbol(1551)
^  Unify: (274) [user] symbol(1551)
   Call: (275) [system] atom(1551)
   Fail: (275) [system] atom(1551)
^  Fail: (274) [user] symbol(1551)
^  Redo: (273) [user] mfix_vars1(1551, _253694)
   Call: (274) [system] 1551=_253694
   Exit: (274) [system] 1551=1551
^  Exit: (273) [user] mfix_vars1(1551, 1551)
   Call: (273) [apply] apply:maplist_([0], _253696, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_288020|_288022], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _288020)
^  Unify: (274) [user] mfix_vars1(0, _288020)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _288020)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_292666))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _288020)
^  Unify: (274) [user] mfix_vars1(0, _288020)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _288020)
^  Unify: (274) [user] mfix_vars1(0, _288020)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _288020)
^  Unify: (274) [user] mfix_vars1(0, _288020)
   Call: (275) [system] 0==[_301946, _301952]
^  Redo: (274) [user] mfix_vars1(0, _288020)
^  Unify: (274) [user] mfix_vars1(0, _288020)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _288020)
^  Unify: (274) [user] mfix_vars1(0, _288020)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _288020)
^  Unify: (274) [user] mfix_vars1(0, _288020)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _288020)
^  Unify: (274) [user] mfix_vars1(0, _288020)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _288020)
   Call: (275) [system] 0=_288020
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _288022, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1551, 0], [1551, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1551, 0], [";;", 1551, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1551, 0], [";;", 1551, 0])
   Call: (270) [system] compound_name_arguments(_182194, '$COMMENT', [";;", 1551, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1551, 0), '$COMMENT', [";;", 1551, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1551, 0)\=@='$COMMENT'(";;", 1551, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1551, 0), _176608)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1551, 0), _338194))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1551, 0), _338194))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1551, 0), _338194))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1551, 0), _338194))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1551, 0), _338194)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1551, 0), _338194)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1551, 0), _343780))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1551, 0), _343780))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1551, 0), _343780)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1551, 0), _343780)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1551, 0), _343780)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1551, 0)\=@='$COMMENT'(";;", 1551, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1551, 0), _338194)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1551, 0), _170996))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1551, 0), _170996))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1551, 0), _170996))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1551, 0), _170996))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1551, 0), _170996)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1551, 0), _170996)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1551, 0), _366100))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1551, 0), _366100))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1551, 0), _366100)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1551, 0), _366100)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1551, 0), _366100)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1551, 0)\=@='$COMMENT'(";;", 1551, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1551, 0), _170996)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1551, 0)\=@='$COMMENT'(";;", 1551, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1551, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1551, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1551, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1551, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1551, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1551, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1551, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1551, 0), _394878, [], _394880)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1551, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1551, 0), _394878, [], _394880)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1551, 0), _394878, [], _394880)
   Call: (258) [system] atom('$COMMENT'(";;", 1551, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1551, 0), _394878, [], _394880)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1551, 0), _394878, [], _394880)
   Call: (258) [system] compound('$COMMENT'(";;", 1551, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1551, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1551, 0), _404194, _404196)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1551, 0), '$COMMENT', [";;", 1551, 0])
^  Call: (258) [user] subst_vars([";;", 1551, 0], _406080, [], _394880)
^  Unify: (258) [user] subst_vars([";;", 1551, 0], [";;", 1551, 0], [], [])
   Call: (259) [system] var([";;", 1551, 0])
^  Redo: (258) [user] subst_vars([";;", 1551, 0], _406080, [], _394880)
^  Unify: (258) [user] subst_vars([";;", 1551, 0], [_409816|_409818], [], _394880)
^  Call: (259) [user] subst_vars(";;", _409816, [], _410756)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _409816, [], _410756)
^  Unify: (259) [user] subst_vars(";;", _409816, [], _410756)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _409816, [], _410756)
^  Unify: (259) [user] subst_vars(";;", _409816, [], _410756)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _409816, [], _410756)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1551, 0], _409818, [], _394880)
^  Unify: (259) [user] subst_vars([1551, 0], [1551, 0], [], [])
   Call: (260) [system] var([1551, 0])
^  Redo: (259) [user] subst_vars([1551, 0], _409818, [], _394880)
^  Unify: (259) [user] subst_vars([1551, 0], [_425688|_425690], [], _394880)
^  Call: (260) [user] subst_vars(1551, _425688, [], _426628)
^  Unify: (260) [user] subst_vars(1551, 1551, [], [])
   Call: (261) [system] var(1551)
^  Redo: (260) [user] subst_vars(1551, _425688, [], _426628)
^  Unify: (260) [user] subst_vars(1551, _425688, [], _426628)
   Call: (261) [system] atom(1551)
^  Redo: (260) [user] subst_vars(1551, _425688, [], _426628)
^  Unify: (260) [user] subst_vars(1551, _425688, [], _426628)
   Call: (261) [system] compound(1551)
^  Redo: (260) [user] subst_vars(1551, _425688, [], _426628)
^  Unify: (260) [user] subst_vars(1551, 1551, [], [])
^  Exit: (260) [user] subst_vars(1551, 1551, [], [])
^  Call: (260) [user] subst_vars([0], _425690, [], _394880)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _425690, [], _394880)
^  Unify: (260) [user] subst_vars([0], [_441560|_441562], [], _394880)
^  Call: (261) [user] subst_vars(0, _441560, [], _442500)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _441560, [], _442500)
^  Unify: (261) [user] subst_vars(0, _441560, [], _442500)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _441560, [], _442500)
^  Unify: (261) [user] subst_vars(0, _441560, [], _442500)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _441560, [], _442500)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _441562, [], _394880)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _441562, [], _394880)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1551, 0], [1551, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1551, 0], [";;", 1551, 0], [], [])
   Call: (258) [system] compound_name_arguments(_394878, '$COMMENT', [";;", 1551, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1551, 0), '$COMMENT', [";;", 1551, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1551, 0), '$COMMENT'(";;", 1551, 0), [], [])
   Call: (257) [system] _464918=metta_file_buffer(+, '$COMMENT'(";;", 1551, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1551, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1551, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1551, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1551, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1551, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1551, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1551, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1551, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1552, 0, 55694, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$stream_position'(55694, 1552, 0, 55728)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _517648))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _517648))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _517648)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _517648)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _517648)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _517648)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _5978))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _5978))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _5978))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _5978))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _5978)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _5978)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _10988))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _10988))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _10988)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _10988)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _10988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _10988)
   Call: (270) [system] var('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _10988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$VAR'(_18448))
   Call: (270) [system] atom('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _10988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _10988)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _10988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _10988)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _10988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _10988)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0)==[_27728, _27734]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _10988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _10988)
   Call: (270) [system] is_list('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _10988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _10988)
   Call: (270) [system] string('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _10988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _10988)
   Call: (270) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _37930, _37932)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0], _41672)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0], _41672)
   Call: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0], _41672, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0], [_44490|_44492], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _44490)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _44490)
   Call: (273) [system] var(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _44490)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", '$VAR'(_49136))
   Call: (273) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _44490)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _44490)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["==true
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _44490)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _44490)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["==false
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _44490)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _44490)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["==[_58416, _58422]
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _44490)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _44490)
   Call: (273) [system] is_list(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _44490)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _44490)
   Call: (273) [system] string(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Exit: (273) [system] string(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _44490)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _44490)
   Call: (273) [system] compound(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _44490)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _44490)
^  Call: (273) [user] symbol(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Unify: (273) [user] symbol(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Call: (274) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Fail: (274) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Fail: (273) [user] symbol(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _44490)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["=_44490
   Exit: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["=";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["
^  Exit: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Call: (272) [apply] apply:maplist_([1552, 0], _44492, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1552, 0], [_82488|_82490], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1552, _82488)
^  Unify: (273) [user] mfix_vars1(1552, _82488)
   Call: (274) [system] var(1552)
^  Redo: (273) [user] mfix_vars1(1552, _82488)
^  Unify: (273) [user] mfix_vars1(1552, '$VAR'(_87134))
   Call: (274) [system] atom(1552)
^  Redo: (273) [user] mfix_vars1(1552, _82488)
^  Unify: (273) [user] mfix_vars1(1552, _82488)
   Call: (274) [system] 1552==true
^  Redo: (273) [user] mfix_vars1(1552, _82488)
^  Unify: (273) [user] mfix_vars1(1552, _82488)
   Call: (274) [system] 1552==false
^  Redo: (273) [user] mfix_vars1(1552, _82488)
^  Unify: (273) [user] mfix_vars1(1552, _82488)
   Call: (274) [system] 1552==[_96414, _96420]
^  Redo: (273) [user] mfix_vars1(1552, _82488)
^  Unify: (273) [user] mfix_vars1(1552, _82488)
   Call: (274) [system] is_list(1552)
^  Redo: (273) [user] mfix_vars1(1552, _82488)
^  Unify: (273) [user] mfix_vars1(1552, _82488)
   Call: (274) [system] string(1552)
^  Redo: (273) [user] mfix_vars1(1552, _82488)
^  Unify: (273) [user] mfix_vars1(1552, _82488)
   Call: (274) [system] compound(1552)
^  Redo: (273) [user] mfix_vars1(1552, _82488)
^  Unify: (273) [user] mfix_vars1(1552, _82488)
^  Call: (274) [user] symbol(1552)
^  Unify: (274) [user] symbol(1552)
   Call: (275) [system] atom(1552)
   Fail: (275) [system] atom(1552)
^  Fail: (274) [user] symbol(1552)
^  Redo: (273) [user] mfix_vars1(1552, _82488)
   Call: (274) [system] 1552=_82488
   Exit: (274) [system] 1552=1552
^  Exit: (273) [user] mfix_vars1(1552, 1552)
   Call: (273) [apply] apply:maplist_([0], _82490, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_116814|_116816], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _116814)
^  Unify: (274) [user] mfix_vars1(0, _116814)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _116814)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_121460))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _116814)
^  Unify: (274) [user] mfix_vars1(0, _116814)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _116814)
^  Unify: (274) [user] mfix_vars1(0, _116814)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _116814)
^  Unify: (274) [user] mfix_vars1(0, _116814)
   Call: (275) [system] 0==[_130740, _130746]
^  Redo: (274) [user] mfix_vars1(0, _116814)
^  Unify: (274) [user] mfix_vars1(0, _116814)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _116814)
^  Unify: (274) [user] mfix_vars1(0, _116814)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _116814)
^  Unify: (274) [user] mfix_vars1(0, _116814)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _116814)
^  Unify: (274) [user] mfix_vars1(0, _116814)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _116814)
   Call: (275) [system] 0=_116814
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _116816, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1552, 0], [1552, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0])
   Call: (270) [system] compound_name_arguments(_10988, '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _5978)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _166988))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _166988))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _166988))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _166988))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _166988)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _166988)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _172574))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _172574))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _172574)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _172574)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _172574)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _166988)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _5956))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _5956))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _5956))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _5956))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _5956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _5956)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _194894))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _194894))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _194894)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _194894)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _194894)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _5956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0)))
   Call: (261) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _223672, [], _223674)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _223672, [], _223674)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _223672, [], _223674)
   Call: (258) [system] atom('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _223672, [], _223674)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _223672, [], _223674)
   Call: (258) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), _232988, _232990)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0])
^  Call: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0], _234874, [], _223674)
^  Unify: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0], [], [])
   Call: (259) [system] var([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0])
^  Redo: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0], _234874, [], _223674)
^  Unify: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0], [_238610|_238612], [], _223674)
^  Call: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _238610, [], _239550)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", [], [])
   Call: (260) [system] var(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _238610, [], _239550)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _238610, [], _239550)
   Call: (260) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _238610, [], _239550)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _238610, [], _239550)
   Call: (260) [system] compound(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _238610, [], _239550)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", [], [])
^  Exit: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", [], [])
^  Call: (259) [user] subst_vars([1552, 0], _238612, [], _223674)
^  Unify: (259) [user] subst_vars([1552, 0], [1552, 0], [], [])
   Call: (260) [system] var([1552, 0])
^  Redo: (259) [user] subst_vars([1552, 0], _238612, [], _223674)
^  Unify: (259) [user] subst_vars([1552, 0], [_254482|_254484], [], _223674)
^  Call: (260) [user] subst_vars(1552, _254482, [], _255422)
^  Unify: (260) [user] subst_vars(1552, 1552, [], [])
   Call: (261) [system] var(1552)
^  Redo: (260) [user] subst_vars(1552, _254482, [], _255422)
^  Unify: (260) [user] subst_vars(1552, _254482, [], _255422)
   Call: (261) [system] atom(1552)
^  Redo: (260) [user] subst_vars(1552, _254482, [], _255422)
^  Unify: (260) [user] subst_vars(1552, _254482, [], _255422)
   Call: (261) [system] compound(1552)
^  Redo: (260) [user] subst_vars(1552, _254482, [], _255422)
^  Unify: (260) [user] subst_vars(1552, 1552, [], [])
^  Exit: (260) [user] subst_vars(1552, 1552, [], [])
^  Call: (260) [user] subst_vars([0], _254484, [], _223674)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _254484, [], _223674)
^  Unify: (260) [user] subst_vars([0], [_270354|_270356], [], _223674)
^  Call: (261) [user] subst_vars(0, _270354, [], _271294)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _270354, [], _271294)
^  Unify: (261) [user] subst_vars(0, _270354, [], _271294)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _270354, [], _271294)
^  Unify: (261) [user] subst_vars(0, _270354, [], _271294)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _270354, [], _271294)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _270356, [], _223674)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _270356, [], _223674)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1552, 0], [1552, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0], [], [])
   Call: (258) [system] compound_name_arguments(_223672, '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), [], [])
   Call: (257) [system] _293712=metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1552, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1553, 0, 55754, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$stream_position'(55754, 1553, 0, 55788)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _346436))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _346436))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _346436)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _346436)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _346436)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _346436)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _352048))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _352048))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _352048))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _352048))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _352048)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _352048)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _357634))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _357634))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _357634)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _357634)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _357634)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _357634)
   Call: (270) [system] var('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _357634)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$VAR'(_365094))
   Call: (270) [system] atom('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _357634)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _357634)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _357634)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _357634)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _357634)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _357634)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0)==[_374374, _374380]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _357634)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _357634)
   Call: (270) [system] is_list('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _357634)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _357634)
   Call: (270) [system] string('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _357634)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _357634)
   Call: (270) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _384576, _384578)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1553, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         vec![expr!(\"@doc-formal\"", 1553, 0], _388318)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         vec![expr!(\"@doc-formal\"", 1553, 0], _388318)
   Call: (271) [apply] apply:maplist_([";;         vec![expr!(\"@doc-formal\"", 1553, 0], _388318, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         vec![expr!(\"@doc-formal\"", 1553, 0], [_391136|_391138], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _391136)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _391136)
   Call: (273) [system] var(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _391136)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", '$VAR'(_395782))
   Call: (273) [system] atom(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _391136)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _391136)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""==true
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _391136)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _391136)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""==false
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _391136)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _391136)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""==[_405062, _405068]
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _391136)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _391136)
   Call: (273) [system] is_list(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _391136)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _391136)
   Call: (273) [system] string(";;         vec![expr!(\"@doc-formal\"")
   Exit: (273) [system] string(";;         vec![expr!(\"@doc-formal\"")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _391136)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _391136)
   Call: (273) [system] compound(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _391136)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _391136)
^  Call: (273) [user] symbol(";;         vec![expr!(\"@doc-formal\"")
^  Unify: (273) [user] symbol(";;         vec![expr!(\"@doc-formal\"")
   Call: (274) [system] atom(";;         vec![expr!(\"@doc-formal\"")
   Fail: (274) [system] atom(";;         vec![expr!(\"@doc-formal\"")
^  Fail: (273) [user] symbol(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _391136)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""=_391136
   Exit: (273) [system] ";;         vec![expr!(\"@doc-formal\""=";;         vec![expr!(\"@doc-formal\""
^  Exit: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"")
   Call: (272) [apply] apply:maplist_([1553, 0], _391138, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1553, 0], [_429134|_429136], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1553, _429134)
^  Unify: (273) [user] mfix_vars1(1553, _429134)
   Call: (274) [system] var(1553)
^  Redo: (273) [user] mfix_vars1(1553, _429134)
^  Unify: (273) [user] mfix_vars1(1553, '$VAR'(_433780))
   Call: (274) [system] atom(1553)
^  Redo: (273) [user] mfix_vars1(1553, _429134)
^  Unify: (273) [user] mfix_vars1(1553, _429134)
   Call: (274) [system] 1553==true
^  Redo: (273) [user] mfix_vars1(1553, _429134)
^  Unify: (273) [user] mfix_vars1(1553, _429134)
   Call: (274) [system] 1553==false
^  Redo: (273) [user] mfix_vars1(1553, _429134)
^  Unify: (273) [user] mfix_vars1(1553, _429134)
   Call: (274) [system] 1553==[_443060, _443066]
^  Redo: (273) [user] mfix_vars1(1553, _429134)
^  Unify: (273) [user] mfix_vars1(1553, _429134)
   Call: (274) [system] is_list(1553)
^  Redo: (273) [user] mfix_vars1(1553, _429134)
^  Unify: (273) [user] mfix_vars1(1553, _429134)
   Call: (274) [system] string(1553)
^  Redo: (273) [user] mfix_vars1(1553, _429134)
^  Unify: (273) [user] mfix_vars1(1553, _429134)
   Call: (274) [system] compound(1553)
^  Redo: (273) [user] mfix_vars1(1553, _429134)
^  Unify: (273) [user] mfix_vars1(1553, _429134)
^  Call: (274) [user] symbol(1553)
^  Unify: (274) [user] symbol(1553)
   Call: (275) [system] atom(1553)
   Fail: (275) [system] atom(1553)
^  Fail: (274) [user] symbol(1553)
^  Redo: (273) [user] mfix_vars1(1553, _429134)
   Call: (274) [system] 1553=_429134
   Exit: (274) [system] 1553=1553
^  Exit: (273) [user] mfix_vars1(1553, 1553)
   Call: (273) [apply] apply:maplist_([0], _429136, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_463460|_463462], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _463460)
^  Unify: (274) [user] mfix_vars1(0, _463460)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _463460)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_468106))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _463460)
^  Unify: (274) [user] mfix_vars1(0, _463460)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _463460)
^  Unify: (274) [user] mfix_vars1(0, _463460)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _463460)
^  Unify: (274) [user] mfix_vars1(0, _463460)
   Call: (275) [system] 0==[_477386, _477392]
^  Redo: (274) [user] mfix_vars1(0, _463460)
^  Unify: (274) [user] mfix_vars1(0, _463460)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _463460)
^  Unify: (274) [user] mfix_vars1(0, _463460)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _463460)
^  Unify: (274) [user] mfix_vars1(0, _463460)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _463460)
^  Unify: (274) [user] mfix_vars1(0, _463460)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _463460)
   Call: (275) [system] 0=_463460
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _463462, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1553, 0], [1553, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         vec![expr!(\"@doc-formal\"", 1553, 0], [";;         vec![expr!(\"@doc-formal\"", 1553, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         vec![expr!(\"@doc-formal\"", 1553, 0], [";;         vec![expr!(\"@doc-formal\"", 1553, 0])
   Call: (270) [system] compound_name_arguments(_357634, '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1553, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1553, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _352048)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _513634))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _513634))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _513634))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _513634))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _513634)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _513634)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _519220))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _519220))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _519220)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _519220)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _519220)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _5972)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _23522))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _23522))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _23522)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _23522)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _23522)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0)))
   Call: (261) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _52300, [], _52302)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _52300, [], _52302)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _52300, [], _52302)
   Call: (258) [system] atom('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _52300, [], _52302)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _52300, [], _52302)
   Call: (258) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), _61616, _61618)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1553, 0])
^  Call: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1553, 0], _63502, [], _52302)
^  Unify: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1553, 0], [";;         vec![expr!(\"@doc-formal\"", 1553, 0], [], [])
   Call: (259) [system] var([";;         vec![expr!(\"@doc-formal\"", 1553, 0])
^  Redo: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1553, 0], _63502, [], _52302)
^  Unify: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1553, 0], [_67238|_67240], [], _52302)
^  Call: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _67238, [], _68178)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"", [], [])
   Call: (260) [system] var(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _67238, [], _68178)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _67238, [], _68178)
   Call: (260) [system] atom(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _67238, [], _68178)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _67238, [], _68178)
   Call: (260) [system] compound(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _67238, [], _68178)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"", [], [])
^  Exit: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"", [], [])
^  Call: (259) [user] subst_vars([1553, 0], _67240, [], _52302)
^  Unify: (259) [user] subst_vars([1553, 0], [1553, 0], [], [])
   Call: (260) [system] var([1553, 0])
^  Redo: (259) [user] subst_vars([1553, 0], _67240, [], _52302)
^  Unify: (259) [user] subst_vars([1553, 0], [_83110|_83112], [], _52302)
^  Call: (260) [user] subst_vars(1553, _83110, [], _84050)
^  Unify: (260) [user] subst_vars(1553, 1553, [], [])
   Call: (261) [system] var(1553)
^  Redo: (260) [user] subst_vars(1553, _83110, [], _84050)
^  Unify: (260) [user] subst_vars(1553, _83110, [], _84050)
   Call: (261) [system] atom(1553)
^  Redo: (260) [user] subst_vars(1553, _83110, [], _84050)
^  Unify: (260) [user] subst_vars(1553, _83110, [], _84050)
   Call: (261) [system] compound(1553)
^  Redo: (260) [user] subst_vars(1553, _83110, [], _84050)
^  Unify: (260) [user] subst_vars(1553, 1553, [], [])
^  Exit: (260) [user] subst_vars(1553, 1553, [], [])
^  Call: (260) [user] subst_vars([0], _83112, [], _52302)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _83112, [], _52302)
^  Unify: (260) [user] subst_vars([0], [_98982|_98984], [], _52302)
^  Call: (261) [user] subst_vars(0, _98982, [], _99922)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _98982, [], _99922)
^  Unify: (261) [user] subst_vars(0, _98982, [], _99922)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _98982, [], _99922)
^  Unify: (261) [user] subst_vars(0, _98982, [], _99922)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _98982, [], _99922)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _98984, [], _52302)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _98984, [], _52302)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1553, 0], [1553, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1553, 0], [";;         vec![expr!(\"@doc-formal\"", 1553, 0], [], [])
   Call: (258) [system] compound_name_arguments(_52300, '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1553, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1553, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), [], [])
   Call: (257) [system] _122340=metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1553, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1554, 0, 55790, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$stream_position'(55790, 1554, 0, 55824)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _175064))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _175064))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _175064)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _175064)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _175064)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _175064)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _180676))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _180676))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _180676))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _180676))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _180676)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _180676)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _186262))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _186262))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _186262)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _186262)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _186262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _186262)
   Call: (270) [system] var('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _186262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$VAR'(_193722))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _186262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _186262)
   Call: (270) [system] '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _186262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _186262)
   Call: (270) [system] '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _186262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _186262)
   Call: (270) [system] '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0)==[_203002, _203008]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _186262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _186262)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _186262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _186262)
   Call: (270) [system] string('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _186262)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _186262)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _213204, _213206)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT', [";;             (\"@item\" \"some-func\")", 1554, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@item\" \"some-func\")", 1554, 0], _216946)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@item\" \"some-func\")", 1554, 0], _216946)
   Call: (271) [apply] apply:maplist_([";;             (\"@item\" \"some-func\")", 1554, 0], _216946, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@item\" \"some-func\")", 1554, 0], [_219764|_219766], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func\")", _219764)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func\")", _219764)
   Call: (273) [system] var(";;             (\"@item\" \"some-func\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func\")", _219764)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func\")", '$VAR'(_224410))
   Call: (273) [system] atom(";;             (\"@item\" \"some-func\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func\")", _219764)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func\")", _219764)
   Call: (273) [system] ";;             (\"@item\" \"some-func\")"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func\")", _219764)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func\")", _219764)
   Call: (273) [system] ";;             (\"@item\" \"some-func\")"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func\")", _219764)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func\")", _219764)
   Call: (273) [system] ";;             (\"@item\" \"some-func\")"==[_233690, _233696]
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func\")", _219764)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func\")", _219764)
   Call: (273) [system] is_list(";;             (\"@item\" \"some-func\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func\")", _219764)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func\")", _219764)
   Call: (273) [system] string(";;             (\"@item\" \"some-func\")")
   Exit: (273) [system] string(";;             (\"@item\" \"some-func\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func\")", _219764)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func\")", _219764)
   Call: (273) [system] compound(";;             (\"@item\" \"some-func\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func\")", _219764)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func\")", _219764)
^  Call: (273) [user] symbol(";;             (\"@item\" \"some-func\")")
^  Unify: (273) [user] symbol(";;             (\"@item\" \"some-func\")")
   Call: (274) [system] atom(";;             (\"@item\" \"some-func\")")
   Fail: (274) [system] atom(";;             (\"@item\" \"some-func\")")
^  Fail: (273) [user] symbol(";;             (\"@item\" \"some-func\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func\")", _219764)
   Call: (273) [system] ";;             (\"@item\" \"some-func\")"=_219764
   Exit: (273) [system] ";;             (\"@item\" \"some-func\")"=";;             (\"@item\" \"some-func\")"
^  Exit: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func\")", ";;             (\"@item\" \"some-func\")")
   Call: (272) [apply] apply:maplist_([1554, 0], _219766, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1554, 0], [_257762|_257764], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1554, _257762)
^  Unify: (273) [user] mfix_vars1(1554, _257762)
   Call: (274) [system] var(1554)
^  Redo: (273) [user] mfix_vars1(1554, _257762)
^  Unify: (273) [user] mfix_vars1(1554, '$VAR'(_262408))
   Call: (274) [system] atom(1554)
^  Redo: (273) [user] mfix_vars1(1554, _257762)
^  Unify: (273) [user] mfix_vars1(1554, _257762)
   Call: (274) [system] 1554==true
^  Redo: (273) [user] mfix_vars1(1554, _257762)
^  Unify: (273) [user] mfix_vars1(1554, _257762)
   Call: (274) [system] 1554==false
^  Redo: (273) [user] mfix_vars1(1554, _257762)
^  Unify: (273) [user] mfix_vars1(1554, _257762)
   Call: (274) [system] 1554==[_271688, _271694]
^  Redo: (273) [user] mfix_vars1(1554, _257762)
^  Unify: (273) [user] mfix_vars1(1554, _257762)
   Call: (274) [system] is_list(1554)
^  Redo: (273) [user] mfix_vars1(1554, _257762)
^  Unify: (273) [user] mfix_vars1(1554, _257762)
   Call: (274) [system] string(1554)
^  Redo: (273) [user] mfix_vars1(1554, _257762)
^  Unify: (273) [user] mfix_vars1(1554, _257762)
   Call: (274) [system] compound(1554)
^  Redo: (273) [user] mfix_vars1(1554, _257762)
^  Unify: (273) [user] mfix_vars1(1554, _257762)
^  Call: (274) [user] symbol(1554)
^  Unify: (274) [user] symbol(1554)
   Call: (275) [system] atom(1554)
   Fail: (275) [system] atom(1554)
^  Fail: (274) [user] symbol(1554)
^  Redo: (273) [user] mfix_vars1(1554, _257762)
   Call: (274) [system] 1554=_257762
   Exit: (274) [system] 1554=1554
^  Exit: (273) [user] mfix_vars1(1554, 1554)
   Call: (273) [apply] apply:maplist_([0], _257764, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_292088|_292090], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _292088)
^  Unify: (274) [user] mfix_vars1(0, _292088)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _292088)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_296734))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _292088)
^  Unify: (274) [user] mfix_vars1(0, _292088)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _292088)
^  Unify: (274) [user] mfix_vars1(0, _292088)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _292088)
^  Unify: (274) [user] mfix_vars1(0, _292088)
   Call: (275) [system] 0==[_306014, _306020]
^  Redo: (274) [user] mfix_vars1(0, _292088)
^  Unify: (274) [user] mfix_vars1(0, _292088)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _292088)
^  Unify: (274) [user] mfix_vars1(0, _292088)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _292088)
^  Unify: (274) [user] mfix_vars1(0, _292088)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _292088)
^  Unify: (274) [user] mfix_vars1(0, _292088)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _292088)
   Call: (275) [system] 0=_292088
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _292090, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1554, 0], [1554, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@item\" \"some-func\")", 1554, 0], [";;             (\"@item\" \"some-func\")", 1554, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@item\" \"some-func\")", 1554, 0], [";;             (\"@item\" \"some-func\")", 1554, 0])
   Call: (270) [system] compound_name_arguments(_186262, '$COMMENT', [";;             (\"@item\" \"some-func\")", 1554, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT', [";;             (\"@item\" \"some-func\")", 1554, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0)\=@='$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _180676)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _342262))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _342262))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _342262))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _342262))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _342262)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _342262)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _347848))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _347848))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _347848)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _347848)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _347848)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0)\=@='$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _342262)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _175064))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _175064))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _175064))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _175064))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _175064)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _175064)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _370168))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _370168))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _370168)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _370168)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _370168)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0)\=@='$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _175064)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0)\=@='$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _398946, [], _398948)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _398946, [], _398948)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _398946, [], _398948)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _398946, [], _398948)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _398946, [], _398948)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), _408262, _408264)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT', [";;             (\"@item\" \"some-func\")", 1554, 0])
^  Call: (258) [user] subst_vars([";;             (\"@item\" \"some-func\")", 1554, 0], _410148, [], _398948)
^  Unify: (258) [user] subst_vars([";;             (\"@item\" \"some-func\")", 1554, 0], [";;             (\"@item\" \"some-func\")", 1554, 0], [], [])
   Call: (259) [system] var([";;             (\"@item\" \"some-func\")", 1554, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@item\" \"some-func\")", 1554, 0], _410148, [], _398948)
^  Unify: (258) [user] subst_vars([";;             (\"@item\" \"some-func\")", 1554, 0], [_413884|_413886], [], _398948)
^  Call: (259) [user] subst_vars(";;             (\"@item\" \"some-func\")", _413884, [], _414824)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" \"some-func\")", ";;             (\"@item\" \"some-func\")", [], [])
   Call: (260) [system] var(";;             (\"@item\" \"some-func\")")
^  Redo: (259) [user] subst_vars(";;             (\"@item\" \"some-func\")", _413884, [], _414824)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" \"some-func\")", _413884, [], _414824)
   Call: (260) [system] atom(";;             (\"@item\" \"some-func\")")
^  Redo: (259) [user] subst_vars(";;             (\"@item\" \"some-func\")", _413884, [], _414824)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" \"some-func\")", _413884, [], _414824)
   Call: (260) [system] compound(";;             (\"@item\" \"some-func\")")
^  Redo: (259) [user] subst_vars(";;             (\"@item\" \"some-func\")", _413884, [], _414824)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" \"some-func\")", ";;             (\"@item\" \"some-func\")", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@item\" \"some-func\")", ";;             (\"@item\" \"some-func\")", [], [])
^  Call: (259) [user] subst_vars([1554, 0], _413886, [], _398948)
^  Unify: (259) [user] subst_vars([1554, 0], [1554, 0], [], [])
   Call: (260) [system] var([1554, 0])
^  Redo: (259) [user] subst_vars([1554, 0], _413886, [], _398948)
^  Unify: (259) [user] subst_vars([1554, 0], [_429756|_429758], [], _398948)
^  Call: (260) [user] subst_vars(1554, _429756, [], _430696)
^  Unify: (260) [user] subst_vars(1554, 1554, [], [])
   Call: (261) [system] var(1554)
^  Redo: (260) [user] subst_vars(1554, _429756, [], _430696)
^  Unify: (260) [user] subst_vars(1554, _429756, [], _430696)
   Call: (261) [system] atom(1554)
^  Redo: (260) [user] subst_vars(1554, _429756, [], _430696)
^  Unify: (260) [user] subst_vars(1554, _429756, [], _430696)
   Call: (261) [system] compound(1554)
^  Redo: (260) [user] subst_vars(1554, _429756, [], _430696)
^  Unify: (260) [user] subst_vars(1554, 1554, [], [])
^  Exit: (260) [user] subst_vars(1554, 1554, [], [])
^  Call: (260) [user] subst_vars([0], _429758, [], _398948)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _429758, [], _398948)
^  Unify: (260) [user] subst_vars([0], [_445628|_445630], [], _398948)
^  Call: (261) [user] subst_vars(0, _445628, [], _446568)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _445628, [], _446568)
^  Unify: (261) [user] subst_vars(0, _445628, [], _446568)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _445628, [], _446568)
^  Unify: (261) [user] subst_vars(0, _445628, [], _446568)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _445628, [], _446568)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _445630, [], _398948)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _445630, [], _398948)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1554, 0], [1554, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@item\" \"some-func\")", 1554, 0], [";;             (\"@item\" \"some-func\")", 1554, 0], [], [])
   Call: (258) [system] compound_name_arguments(_398946, '$COMMENT', [";;             (\"@item\" \"some-func\")", 1554, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT', [";;             (\"@item\" \"some-func\")", 1554, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), [], [])
   Call: (257) [system] _468986=metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"some-func\")", 1554, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1555, 0, 55827, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$stream_position'(55827, 1555, 0, 55861)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _521710))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _521710))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _5950)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _5950)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _5950)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _5950)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _9364))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _9364))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _9364))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _9364))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _9364)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _9364)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _14950))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _14950))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _14950)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _14950)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _14950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _14950)
   Call: (270) [system] var('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _14950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$VAR'(_22410))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _14950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _14950)
   Call: (270) [system] '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _14950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _14950)
   Call: (270) [system] '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _14950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _14950)
   Call: (270) [system] '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0)==[_31690, _31696]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _14950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _14950)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _14950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _14950)
   Call: (270) [system] string('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _14950)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _14950)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _41892, _41894)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT', [";;             (\"@kind\" \"function\")", 1555, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@kind\" \"function\")", 1555, 0], _45634)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@kind\" \"function\")", 1555, 0], _45634)
   Call: (271) [apply] apply:maplist_([";;             (\"@kind\" \"function\")", 1555, 0], _45634, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@kind\" \"function\")", 1555, 0], [_48452|_48454], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _48452)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _48452)
   Call: (273) [system] var(";;             (\"@kind\" \"function\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _48452)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", '$VAR'(_53098))
   Call: (273) [system] atom(";;             (\"@kind\" \"function\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _48452)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _48452)
   Call: (273) [system] ";;             (\"@kind\" \"function\")"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _48452)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _48452)
   Call: (273) [system] ";;             (\"@kind\" \"function\")"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _48452)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _48452)
   Call: (273) [system] ";;             (\"@kind\" \"function\")"==[_62378, _62384]
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _48452)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _48452)
   Call: (273) [system] is_list(";;             (\"@kind\" \"function\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _48452)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _48452)
   Call: (273) [system] string(";;             (\"@kind\" \"function\")")
   Exit: (273) [system] string(";;             (\"@kind\" \"function\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _48452)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _48452)
   Call: (273) [system] compound(";;             (\"@kind\" \"function\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _48452)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _48452)
^  Call: (273) [user] symbol(";;             (\"@kind\" \"function\")")
^  Unify: (273) [user] symbol(";;             (\"@kind\" \"function\")")
   Call: (274) [system] atom(";;             (\"@kind\" \"function\")")
   Fail: (274) [system] atom(";;             (\"@kind\" \"function\")")
^  Fail: (273) [user] symbol(";;             (\"@kind\" \"function\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _48452)
   Call: (273) [system] ";;             (\"@kind\" \"function\")"=_48452
   Exit: (273) [system] ";;             (\"@kind\" \"function\")"=";;             (\"@kind\" \"function\")"
^  Exit: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", ";;             (\"@kind\" \"function\")")
   Call: (272) [apply] apply:maplist_([1555, 0], _48454, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1555, 0], [_86450|_86452], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1555, _86450)
^  Unify: (273) [user] mfix_vars1(1555, _86450)
   Call: (274) [system] var(1555)
^  Redo: (273) [user] mfix_vars1(1555, _86450)
^  Unify: (273) [user] mfix_vars1(1555, '$VAR'(_91096))
   Call: (274) [system] atom(1555)
^  Redo: (273) [user] mfix_vars1(1555, _86450)
^  Unify: (273) [user] mfix_vars1(1555, _86450)
   Call: (274) [system] 1555==true
^  Redo: (273) [user] mfix_vars1(1555, _86450)
^  Unify: (273) [user] mfix_vars1(1555, _86450)
   Call: (274) [system] 1555==false
^  Redo: (273) [user] mfix_vars1(1555, _86450)
^  Unify: (273) [user] mfix_vars1(1555, _86450)
   Call: (274) [system] 1555==[_100376, _100382]
^  Redo: (273) [user] mfix_vars1(1555, _86450)
^  Unify: (273) [user] mfix_vars1(1555, _86450)
   Call: (274) [system] is_list(1555)
^  Redo: (273) [user] mfix_vars1(1555, _86450)
^  Unify: (273) [user] mfix_vars1(1555, _86450)
   Call: (274) [system] string(1555)
^  Redo: (273) [user] mfix_vars1(1555, _86450)
^  Unify: (273) [user] mfix_vars1(1555, _86450)
   Call: (274) [system] compound(1555)
^  Redo: (273) [user] mfix_vars1(1555, _86450)
^  Unify: (273) [user] mfix_vars1(1555, _86450)
^  Call: (274) [user] symbol(1555)
^  Unify: (274) [user] symbol(1555)
   Call: (275) [system] atom(1555)
   Fail: (275) [system] atom(1555)
^  Fail: (274) [user] symbol(1555)
^  Redo: (273) [user] mfix_vars1(1555, _86450)
   Call: (274) [system] 1555=_86450
   Exit: (274) [system] 1555=1555
^  Exit: (273) [user] mfix_vars1(1555, 1555)
   Call: (273) [apply] apply:maplist_([0], _86452, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_120776|_120778], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _120776)
^  Unify: (274) [user] mfix_vars1(0, _120776)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _120776)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_125422))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _120776)
^  Unify: (274) [user] mfix_vars1(0, _120776)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _120776)
^  Unify: (274) [user] mfix_vars1(0, _120776)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _120776)
^  Unify: (274) [user] mfix_vars1(0, _120776)
   Call: (275) [system] 0==[_134702, _134708]
^  Redo: (274) [user] mfix_vars1(0, _120776)
^  Unify: (274) [user] mfix_vars1(0, _120776)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _120776)
^  Unify: (274) [user] mfix_vars1(0, _120776)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _120776)
^  Unify: (274) [user] mfix_vars1(0, _120776)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _120776)
^  Unify: (274) [user] mfix_vars1(0, _120776)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _120776)
   Call: (275) [system] 0=_120776
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _120778, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1555, 0], [1555, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@kind\" \"function\")", 1555, 0], [";;             (\"@kind\" \"function\")", 1555, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@kind\" \"function\")", 1555, 0], [";;             (\"@kind\" \"function\")", 1555, 0])
   Call: (270) [system] compound_name_arguments(_14950, '$COMMENT', [";;             (\"@kind\" \"function\")", 1555, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT', [";;             (\"@kind\" \"function\")", 1555, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0)\=@='$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _9364)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _170950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _170950))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _170950))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _170950))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _170950)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _170950)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _176536))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _176536))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _176536)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _176536)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _176536)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0)\=@='$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _170950)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _198856))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _198856))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _198856)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _198856)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _198856)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0)\=@='$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0)\=@='$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _227634, [], _227636)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _227634, [], _227636)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _227634, [], _227636)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _227634, [], _227636)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _227634, [], _227636)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), _236950, _236952)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT', [";;             (\"@kind\" \"function\")", 1555, 0])
^  Call: (258) [user] subst_vars([";;             (\"@kind\" \"function\")", 1555, 0], _238836, [], _227636)
^  Unify: (258) [user] subst_vars([";;             (\"@kind\" \"function\")", 1555, 0], [";;             (\"@kind\" \"function\")", 1555, 0], [], [])
   Call: (259) [system] var([";;             (\"@kind\" \"function\")", 1555, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@kind\" \"function\")", 1555, 0], _238836, [], _227636)
^  Unify: (258) [user] subst_vars([";;             (\"@kind\" \"function\")", 1555, 0], [_242572|_242574], [], _227636)
^  Call: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", _242572, [], _243512)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", ";;             (\"@kind\" \"function\")", [], [])
   Call: (260) [system] var(";;             (\"@kind\" \"function\")")
^  Redo: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", _242572, [], _243512)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", _242572, [], _243512)
   Call: (260) [system] atom(";;             (\"@kind\" \"function\")")
^  Redo: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", _242572, [], _243512)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", _242572, [], _243512)
   Call: (260) [system] compound(";;             (\"@kind\" \"function\")")
^  Redo: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", _242572, [], _243512)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", ";;             (\"@kind\" \"function\")", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", ";;             (\"@kind\" \"function\")", [], [])
^  Call: (259) [user] subst_vars([1555, 0], _242574, [], _227636)
^  Unify: (259) [user] subst_vars([1555, 0], [1555, 0], [], [])
   Call: (260) [system] var([1555, 0])
^  Redo: (259) [user] subst_vars([1555, 0], _242574, [], _227636)
^  Unify: (259) [user] subst_vars([1555, 0], [_258444|_258446], [], _227636)
^  Call: (260) [user] subst_vars(1555, _258444, [], _259384)
^  Unify: (260) [user] subst_vars(1555, 1555, [], [])
   Call: (261) [system] var(1555)
^  Redo: (260) [user] subst_vars(1555, _258444, [], _259384)
^  Unify: (260) [user] subst_vars(1555, _258444, [], _259384)
   Call: (261) [system] atom(1555)
^  Redo: (260) [user] subst_vars(1555, _258444, [], _259384)
^  Unify: (260) [user] subst_vars(1555, _258444, [], _259384)
   Call: (261) [system] compound(1555)
^  Redo: (260) [user] subst_vars(1555, _258444, [], _259384)
^  Unify: (260) [user] subst_vars(1555, 1555, [], [])
^  Exit: (260) [user] subst_vars(1555, 1555, [], [])
^  Call: (260) [user] subst_vars([0], _258446, [], _227636)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _258446, [], _227636)
^  Unify: (260) [user] subst_vars([0], [_274316|_274318], [], _227636)
^  Call: (261) [user] subst_vars(0, _274316, [], _275256)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _274316, [], _275256)
^  Unify: (261) [user] subst_vars(0, _274316, [], _275256)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _274316, [], _275256)
^  Unify: (261) [user] subst_vars(0, _274316, [], _275256)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _274316, [], _275256)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _274318, [], _227636)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _274318, [], _227636)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1555, 0], [1555, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@kind\" \"function\")", 1555, 0], [";;             (\"@kind\" \"function\")", 1555, 0], [], [])
   Call: (258) [system] compound_name_arguments(_227634, '$COMMENT', [";;             (\"@kind\" \"function\")", 1555, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT', [";;             (\"@kind\" \"function\")", 1555, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), [], [])
   Call: (257) [system] _297674=metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1555, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1556, 0, 55863, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$stream_position'(55863, 1556, 0, 55897)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _350406))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _350406))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _350406)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _350406)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _350406)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _350406)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _356018))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _356018))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _356018))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _356018))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _356018)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _356018)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _361604))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _361604))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _361604)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _361604)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _361604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _361604)
   Call: (270) [system] var('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _361604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$VAR'(_369064))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _361604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _361604)
   Call: (270) [system] '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _361604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _361604)
   Call: (270) [system] '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _361604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _361604)
   Call: (270) [system] '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0)==[_378344, _378350]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _361604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _361604)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _361604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _361604)
   Call: (270) [system] string('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _361604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _361604)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _388546, _388548)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT', [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0], _392288)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0], _392288)
   Call: (271) [apply] apply:maplist_([";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0], _392288, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0], [_395106|_395108], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _395106)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _395106)
   Call: (273) [system] var(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _395106)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", '$VAR'(_399752))
   Call: (273) [system] atom(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _395106)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _395106)
   Call: (273) [system] ";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _395106)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _395106)
   Call: (273) [system] ";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _395106)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _395106)
   Call: (273) [system] ";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))"==[_409032, _409038]
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _395106)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _395106)
   Call: (273) [system] is_list(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _395106)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _395106)
   Call: (273) [system] string(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
   Exit: (273) [system] string(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _395106)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _395106)
   Call: (273) [system] compound(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _395106)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _395106)
^  Call: (273) [user] symbol(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
^  Unify: (273) [user] symbol(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
   Call: (274) [system] atom(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
   Fail: (274) [system] atom(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
^  Fail: (273) [user] symbol(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _395106)
   Call: (273) [system] ";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))"=_395106
   Exit: (273) [system] ";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))"=";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))"
^  Exit: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", ";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
   Call: (272) [apply] apply:maplist_([1556, 0], _395108, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1556, 0], [_433104|_433106], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1556, _433104)
^  Unify: (273) [user] mfix_vars1(1556, _433104)
   Call: (274) [system] var(1556)
^  Redo: (273) [user] mfix_vars1(1556, _433104)
^  Unify: (273) [user] mfix_vars1(1556, '$VAR'(_437750))
   Call: (274) [system] atom(1556)
^  Redo: (273) [user] mfix_vars1(1556, _433104)
^  Unify: (273) [user] mfix_vars1(1556, _433104)
   Call: (274) [system] 1556==true
^  Redo: (273) [user] mfix_vars1(1556, _433104)
^  Unify: (273) [user] mfix_vars1(1556, _433104)
   Call: (274) [system] 1556==false
^  Redo: (273) [user] mfix_vars1(1556, _433104)
^  Unify: (273) [user] mfix_vars1(1556, _433104)
   Call: (274) [system] 1556==[_447030, _447036]
^  Redo: (273) [user] mfix_vars1(1556, _433104)
^  Unify: (273) [user] mfix_vars1(1556, _433104)
   Call: (274) [system] is_list(1556)
^  Redo: (273) [user] mfix_vars1(1556, _433104)
^  Unify: (273) [user] mfix_vars1(1556, _433104)
   Call: (274) [system] string(1556)
^  Redo: (273) [user] mfix_vars1(1556, _433104)
^  Unify: (273) [user] mfix_vars1(1556, _433104)
   Call: (274) [system] compound(1556)
^  Redo: (273) [user] mfix_vars1(1556, _433104)
^  Unify: (273) [user] mfix_vars1(1556, _433104)
^  Call: (274) [user] symbol(1556)
^  Unify: (274) [user] symbol(1556)
   Call: (275) [system] atom(1556)
   Fail: (275) [system] atom(1556)
^  Fail: (274) [user] symbol(1556)
^  Redo: (273) [user] mfix_vars1(1556, _433104)
   Call: (274) [system] 1556=_433104
   Exit: (274) [system] 1556=1556
^  Exit: (273) [user] mfix_vars1(1556, 1556)
   Call: (273) [apply] apply:maplist_([0], _433106, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_467430|_467432], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _467430)
^  Unify: (274) [user] mfix_vars1(0, _467430)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _467430)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_472076))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _467430)
^  Unify: (274) [user] mfix_vars1(0, _467430)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _467430)
^  Unify: (274) [user] mfix_vars1(0, _467430)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _467430)
^  Unify: (274) [user] mfix_vars1(0, _467430)
   Call: (275) [system] 0==[_481356, _481362]
^  Redo: (274) [user] mfix_vars1(0, _467430)
^  Unify: (274) [user] mfix_vars1(0, _467430)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _467430)
^  Unify: (274) [user] mfix_vars1(0, _467430)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _467430)
^  Unify: (274) [user] mfix_vars1(0, _467430)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _467430)
^  Unify: (274) [user] mfix_vars1(0, _467430)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _467430)
   Call: (275) [system] 0=_467430
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _467432, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1556, 0], [1556, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0], [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0], [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0])
   Call: (270) [system] compound_name_arguments(_361604, '$COMMENT', [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT', [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0)\=@='$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _356018)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _517604))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _517604))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _517604))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _517604))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _517604)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _517604)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _523190))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _5994))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _5994)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _5994)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _5994)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0)\=@='$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _5980)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _5958))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _5958))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _5958))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _5958))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _5958)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _5958)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _27352))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _27352))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _27352)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _27352)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _27352)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0)\=@='$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _5958)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0)\=@='$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _56130, [], _56132)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _56130, [], _56132)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _56130, [], _56132)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _56130, [], _56132)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _56130, [], _56132)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), _65446, _65448)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT', [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0])
^  Call: (258) [user] subst_vars([";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0], _67332, [], _56132)
^  Unify: (258) [user] subst_vars([";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0], [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0], [], [])
   Call: (259) [system] var([";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0], _67332, [], _56132)
^  Unify: (258) [user] subst_vars([";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0], [_71068|_71070], [], _56132)
^  Call: (259) [user] subst_vars(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _71068, [], _72008)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", ";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", [], [])
   Call: (260) [system] var(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
^  Redo: (259) [user] subst_vars(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _71068, [], _72008)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _71068, [], _72008)
   Call: (260) [system] atom(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
^  Redo: (259) [user] subst_vars(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _71068, [], _72008)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _71068, [], _72008)
   Call: (260) [system] compound(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
^  Redo: (259) [user] subst_vars(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _71068, [], _72008)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", ";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", ";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", [], [])
^  Call: (259) [user] subst_vars([1556, 0], _71070, [], _56132)
^  Unify: (259) [user] subst_vars([1556, 0], [1556, 0], [], [])
   Call: (260) [system] var([1556, 0])
^  Redo: (259) [user] subst_vars([1556, 0], _71070, [], _56132)
^  Unify: (259) [user] subst_vars([1556, 0], [_86940|_86942], [], _56132)
^  Call: (260) [user] subst_vars(1556, _86940, [], _87880)
^  Unify: (260) [user] subst_vars(1556, 1556, [], [])
   Call: (261) [system] var(1556)
^  Redo: (260) [user] subst_vars(1556, _86940, [], _87880)
^  Unify: (260) [user] subst_vars(1556, _86940, [], _87880)
   Call: (261) [system] atom(1556)
^  Redo: (260) [user] subst_vars(1556, _86940, [], _87880)
^  Unify: (260) [user] subst_vars(1556, _86940, [], _87880)
   Call: (261) [system] compound(1556)
^  Redo: (260) [user] subst_vars(1556, _86940, [], _87880)
^  Unify: (260) [user] subst_vars(1556, 1556, [], [])
^  Exit: (260) [user] subst_vars(1556, 1556, [], [])
^  Call: (260) [user] subst_vars([0], _86942, [], _56132)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _86942, [], _56132)
^  Unify: (260) [user] subst_vars([0], [_102812|_102814], [], _56132)
^  Call: (261) [user] subst_vars(0, _102812, [], _103752)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _102812, [], _103752)
^  Unify: (261) [user] subst_vars(0, _102812, [], _103752)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _102812, [], _103752)
^  Unify: (261) [user] subst_vars(0, _102812, [], _103752)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _102812, [], _103752)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _102814, [], _56132)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _102814, [], _56132)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1556, 0], [1556, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0], [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0], [], [])
   Call: (258) [system] compound_name_arguments(_56130, '$COMMENT', [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT', [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), [], [])
   Call: (257) [system] _126170=metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1556, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1557, 0, 55930, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$stream_position'(55930, 1557, 0, 55964)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _178900))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _178900))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _178900)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _178900)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _178900)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _178900)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _184512))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _184512))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _184512))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _184512))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _184512)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _184512)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _190098))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _190098))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _190098)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _190098)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _190098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _190098)
   Call: (270) [system] var('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _190098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$VAR'(_197558))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _190098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _190098)
   Call: (270) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _190098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _190098)
   Call: (270) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _190098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _190098)
   Call: (270) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0)==[_206838, _206844]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _190098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _190098)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _190098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _190098)
   Call: (270) [system] string('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _190098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _190098)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _217040, _217042)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0], _220782)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0], _220782)
   Call: (271) [apply] apply:maplist_([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0], _220782, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0], [_223600|_223602], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _223600)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _223600)
   Call: (273) [system] var(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _223600)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", '$VAR'(_228246))
   Call: (273) [system] atom(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _223600)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _223600)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"Test function\")})"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _223600)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _223600)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"Test function\")})"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _223600)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _223600)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"Test function\")})"==[_237526, _237532]
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _223600)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _223600)
   Call: (273) [system] is_list(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _223600)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _223600)
   Call: (273) [system] string(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
   Exit: (273) [system] string(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _223600)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _223600)
   Call: (273) [system] compound(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _223600)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _223600)
^  Call: (273) [user] symbol(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Unify: (273) [user] symbol(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
   Call: (274) [system] atom(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
   Fail: (274) [system] atom(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Fail: (273) [user] symbol(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _223600)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"Test function\")})"=_223600
   Exit: (273) [system] ";;             (\"@desc\" {Str::from_str(\"Test function\")})"=";;             (\"@desc\" {Str::from_str(\"Test function\")})"
^  Exit: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", ";;             (\"@desc\" {Str::from_str(\"Test function\")})")
   Call: (272) [apply] apply:maplist_([1557, 0], _223602, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1557, 0], [_261598|_261600], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1557, _261598)
^  Unify: (273) [user] mfix_vars1(1557, _261598)
   Call: (274) [system] var(1557)
^  Redo: (273) [user] mfix_vars1(1557, _261598)
^  Unify: (273) [user] mfix_vars1(1557, '$VAR'(_266244))
   Call: (274) [system] atom(1557)
^  Redo: (273) [user] mfix_vars1(1557, _261598)
^  Unify: (273) [user] mfix_vars1(1557, _261598)
   Call: (274) [system] 1557==true
^  Redo: (273) [user] mfix_vars1(1557, _261598)
^  Unify: (273) [user] mfix_vars1(1557, _261598)
   Call: (274) [system] 1557==false
^  Redo: (273) [user] mfix_vars1(1557, _261598)
^  Unify: (273) [user] mfix_vars1(1557, _261598)
   Call: (274) [system] 1557==[_275524, _275530]
^  Redo: (273) [user] mfix_vars1(1557, _261598)
^  Unify: (273) [user] mfix_vars1(1557, _261598)
   Call: (274) [system] is_list(1557)
^  Redo: (273) [user] mfix_vars1(1557, _261598)
^  Unify: (273) [user] mfix_vars1(1557, _261598)
   Call: (274) [system] string(1557)
^  Redo: (273) [user] mfix_vars1(1557, _261598)
^  Unify: (273) [user] mfix_vars1(1557, _261598)
   Call: (274) [system] compound(1557)
^  Redo: (273) [user] mfix_vars1(1557, _261598)
^  Unify: (273) [user] mfix_vars1(1557, _261598)
^  Call: (274) [user] symbol(1557)
^  Unify: (274) [user] symbol(1557)
   Call: (275) [system] atom(1557)
   Fail: (275) [system] atom(1557)
^  Fail: (274) [user] symbol(1557)
^  Redo: (273) [user] mfix_vars1(1557, _261598)
   Call: (274) [system] 1557=_261598
   Exit: (274) [system] 1557=1557
^  Exit: (273) [user] mfix_vars1(1557, 1557)
   Call: (273) [apply] apply:maplist_([0], _261600, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_295924|_295926], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _295924)
^  Unify: (274) [user] mfix_vars1(0, _295924)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _295924)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_300570))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _295924)
^  Unify: (274) [user] mfix_vars1(0, _295924)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _295924)
^  Unify: (274) [user] mfix_vars1(0, _295924)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _295924)
^  Unify: (274) [user] mfix_vars1(0, _295924)
   Call: (275) [system] 0==[_309850, _309856]
^  Redo: (274) [user] mfix_vars1(0, _295924)
^  Unify: (274) [user] mfix_vars1(0, _295924)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _295924)
^  Unify: (274) [user] mfix_vars1(0, _295924)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _295924)
^  Unify: (274) [user] mfix_vars1(0, _295924)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _295924)
^  Unify: (274) [user] mfix_vars1(0, _295924)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _295924)
   Call: (275) [system] 0=_295924
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _295926, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1557, 0], [1557, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0], [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0], [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0])
   Call: (270) [system] compound_name_arguments(_190098, '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _184512)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _346098))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _346098))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _346098))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _346098))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _346098)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _346098)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _351684))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _351684))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _351684)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _351684)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _351684)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _346098)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _178900))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _178900))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _178900))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _178900))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _178900)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _178900)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _374004))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _374004))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _374004)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _374004)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _374004)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _178900)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _402782, [], _402784)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _402782, [], _402784)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _402782, [], _402784)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _402782, [], _402784)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _402782, [], _402784)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), _412098, _412100)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0])
^  Call: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0], _413984, [], _402784)
^  Unify: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0], [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0], [], [])
   Call: (259) [system] var([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0], _413984, [], _402784)
^  Unify: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0], [_417720|_417722], [], _402784)
^  Call: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _417720, [], _418660)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", ";;             (\"@desc\" {Str::from_str(\"Test function\")})", [], [])
   Call: (260) [system] var(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _417720, [], _418660)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _417720, [], _418660)
   Call: (260) [system] atom(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _417720, [], _418660)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _417720, [], _418660)
   Call: (260) [system] compound(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _417720, [], _418660)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", ";;             (\"@desc\" {Str::from_str(\"Test function\")})", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", ";;             (\"@desc\" {Str::from_str(\"Test function\")})", [], [])
^  Call: (259) [user] subst_vars([1557, 0], _417722, [], _402784)
^  Unify: (259) [user] subst_vars([1557, 0], [1557, 0], [], [])
   Call: (260) [system] var([1557, 0])
^  Redo: (259) [user] subst_vars([1557, 0], _417722, [], _402784)
^  Unify: (259) [user] subst_vars([1557, 0], [_433592|_433594], [], _402784)
^  Call: (260) [user] subst_vars(1557, _433592, [], _434532)
^  Unify: (260) [user] subst_vars(1557, 1557, [], [])
   Call: (261) [system] var(1557)
^  Redo: (260) [user] subst_vars(1557, _433592, [], _434532)
^  Unify: (260) [user] subst_vars(1557, _433592, [], _434532)
   Call: (261) [system] atom(1557)
^  Redo: (260) [user] subst_vars(1557, _433592, [], _434532)
^  Unify: (260) [user] subst_vars(1557, _433592, [], _434532)
   Call: (261) [system] compound(1557)
^  Redo: (260) [user] subst_vars(1557, _433592, [], _434532)
^  Unify: (260) [user] subst_vars(1557, 1557, [], [])
^  Exit: (260) [user] subst_vars(1557, 1557, [], [])
^  Call: (260) [user] subst_vars([0], _433594, [], _402784)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _433594, [], _402784)
^  Unify: (260) [user] subst_vars([0], [_449464|_449466], [], _402784)
^  Call: (261) [user] subst_vars(0, _449464, [], _450404)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _449464, [], _450404)
^  Unify: (261) [user] subst_vars(0, _449464, [], _450404)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _449464, [], _450404)
^  Unify: (261) [user] subst_vars(0, _449464, [], _450404)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _449464, [], _450404)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _449466, [], _402784)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _449466, [], _402784)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1557, 0], [1557, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0], [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0], [], [])
   Call: (258) [system] compound_name_arguments(_402782, '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), [], [])
   Call: (257) [system] _472822=metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1557, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1558, 0, 55988, '$COMMENT'(";;             (\"@params\" (", 1558, 0), '$stream_position'(55988, 1558, 0, 56022)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _7552))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _7552))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _7552)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _7552)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@params\" (", 1558, 0), _7552)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@params\" (", 1558, 0), _7552)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _13164))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _13164))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _13164))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _13164))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _13164)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _13164)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _18750))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _18750))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _18750)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _18750)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1558, 0), _18750)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1558, 0), _18750)
   Call: (270) [system] var('$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1558, 0), _18750)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1558, 0), '$VAR'(_26210))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1558, 0), _18750)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1558, 0), _18750)
   Call: (270) [system] '$COMMENT'(";;             (\"@params\" (", 1558, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1558, 0), _18750)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1558, 0), _18750)
   Call: (270) [system] '$COMMENT'(";;             (\"@params\" (", 1558, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1558, 0), _18750)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1558, 0), _18750)
   Call: (270) [system] '$COMMENT'(";;             (\"@params\" (", 1558, 0)==[_35490, _35496]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1558, 0), _18750)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1558, 0), _18750)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1558, 0), _18750)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1558, 0), _18750)
   Call: (270) [system] string('$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1558, 0), _18750)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1558, 0), _18750)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@params\" (", 1558, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@params\" (", 1558, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@params\" (", 1558, 0), _45692, _45694)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT', [";;             (\"@params\" (", 1558, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@params\" (", 1558, 0], _49434)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@params\" (", 1558, 0], _49434)
   Call: (271) [apply] apply:maplist_([";;             (\"@params\" (", 1558, 0], _49434, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@params\" (", 1558, 0], [_52252|_52254], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@params\" (", _52252)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _52252)
   Call: (273) [system] var(";;             (\"@params\" (")
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _52252)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", '$VAR'(_56898))
   Call: (273) [system] atom(";;             (\"@params\" (")
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _52252)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _52252)
   Call: (273) [system] ";;             (\"@params\" ("==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _52252)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _52252)
   Call: (273) [system] ";;             (\"@params\" ("==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _52252)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _52252)
   Call: (273) [system] ";;             (\"@params\" ("==[_66178, _66184]
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _52252)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _52252)
   Call: (273) [system] is_list(";;             (\"@params\" (")
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _52252)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _52252)
   Call: (273) [system] string(";;             (\"@params\" (")
   Exit: (273) [system] string(";;             (\"@params\" (")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _52252)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _52252)
   Call: (273) [system] compound(";;             (\"@params\" (")
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _52252)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _52252)
^  Call: (273) [user] symbol(";;             (\"@params\" (")
^  Unify: (273) [user] symbol(";;             (\"@params\" (")
   Call: (274) [system] atom(";;             (\"@params\" (")
   Fail: (274) [system] atom(";;             (\"@params\" (")
^  Fail: (273) [user] symbol(";;             (\"@params\" (")
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _52252)
   Call: (273) [system] ";;             (\"@params\" ("=_52252
   Exit: (273) [system] ";;             (\"@params\" ("=";;             (\"@params\" ("
^  Exit: (272) [user] mfix_vars1(";;             (\"@params\" (", ";;             (\"@params\" (")
   Call: (272) [apply] apply:maplist_([1558, 0], _52254, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1558, 0], [_90250|_90252], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1558, _90250)
^  Unify: (273) [user] mfix_vars1(1558, _90250)
   Call: (274) [system] var(1558)
^  Redo: (273) [user] mfix_vars1(1558, _90250)
^  Unify: (273) [user] mfix_vars1(1558, '$VAR'(_94896))
   Call: (274) [system] atom(1558)
^  Redo: (273) [user] mfix_vars1(1558, _90250)
^  Unify: (273) [user] mfix_vars1(1558, _90250)
   Call: (274) [system] 1558==true
^  Redo: (273) [user] mfix_vars1(1558, _90250)
^  Unify: (273) [user] mfix_vars1(1558, _90250)
   Call: (274) [system] 1558==false
^  Redo: (273) [user] mfix_vars1(1558, _90250)
^  Unify: (273) [user] mfix_vars1(1558, _90250)
   Call: (274) [system] 1558==[_104176, _104182]
^  Redo: (273) [user] mfix_vars1(1558, _90250)
^  Unify: (273) [user] mfix_vars1(1558, _90250)
   Call: (274) [system] is_list(1558)
^  Redo: (273) [user] mfix_vars1(1558, _90250)
^  Unify: (273) [user] mfix_vars1(1558, _90250)
   Call: (274) [system] string(1558)
^  Redo: (273) [user] mfix_vars1(1558, _90250)
^  Unify: (273) [user] mfix_vars1(1558, _90250)
   Call: (274) [system] compound(1558)
^  Redo: (273) [user] mfix_vars1(1558, _90250)
^  Unify: (273) [user] mfix_vars1(1558, _90250)
^  Call: (274) [user] symbol(1558)
^  Unify: (274) [user] symbol(1558)
   Call: (275) [system] atom(1558)
   Fail: (275) [system] atom(1558)
^  Fail: (274) [user] symbol(1558)
^  Redo: (273) [user] mfix_vars1(1558, _90250)
   Call: (274) [system] 1558=_90250
   Exit: (274) [system] 1558=1558
^  Exit: (273) [user] mfix_vars1(1558, 1558)
   Call: (273) [apply] apply:maplist_([0], _90252, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_124576|_124578], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _124576)
^  Unify: (274) [user] mfix_vars1(0, _124576)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _124576)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_129222))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _124576)
^  Unify: (274) [user] mfix_vars1(0, _124576)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _124576)
^  Unify: (274) [user] mfix_vars1(0, _124576)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _124576)
^  Unify: (274) [user] mfix_vars1(0, _124576)
   Call: (275) [system] 0==[_138502, _138508]
^  Redo: (274) [user] mfix_vars1(0, _124576)
^  Unify: (274) [user] mfix_vars1(0, _124576)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _124576)
^  Unify: (274) [user] mfix_vars1(0, _124576)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _124576)
^  Unify: (274) [user] mfix_vars1(0, _124576)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _124576)
^  Unify: (274) [user] mfix_vars1(0, _124576)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _124576)
   Call: (275) [system] 0=_124576
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _124578, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1558, 0], [1558, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@params\" (", 1558, 0], [";;             (\"@params\" (", 1558, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@params\" (", 1558, 0], [";;             (\"@params\" (", 1558, 0])
   Call: (270) [system] compound_name_arguments(_18750, '$COMMENT', [";;             (\"@params\" (", 1558, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT', [";;             (\"@params\" (", 1558, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@params\" (", 1558, 0)\=@='$COMMENT'(";;             (\"@params\" (", 1558, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _13164)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _174750))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _174750))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _174750))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _174750))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _174750)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _174750)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _180336))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _180336))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _180336)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _180336)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@params\" (", 1558, 0), _180336)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@params\" (", 1558, 0)\=@='$COMMENT'(";;             (\"@params\" (", 1558, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _174750)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _7552))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _7552))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _7552))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _7552))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _7552)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _7552)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _202656))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _202656))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _202656)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _202656)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@params\" (", 1558, 0), _202656)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@params\" (", 1558, 0)\=@='$COMMENT'(";;             (\"@params\" (", 1558, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _7552)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@params\" (", 1558, 0)\=@='$COMMENT'(";;             (\"@params\" (", 1558, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1558, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@params\" (", 1558, 0), _231434, [], _231436)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@params\" (", 1558, 0), _231434, [], _231436)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@params\" (", 1558, 0), _231434, [], _231436)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@params\" (", 1558, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@params\" (", 1558, 0), _231434, [], _231436)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@params\" (", 1558, 0), _231434, [], _231436)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@params\" (", 1558, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@params\" (", 1558, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@params\" (", 1558, 0), _240750, _240752)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT', [";;             (\"@params\" (", 1558, 0])
^  Call: (258) [user] subst_vars([";;             (\"@params\" (", 1558, 0], _242636, [], _231436)
^  Unify: (258) [user] subst_vars([";;             (\"@params\" (", 1558, 0], [";;             (\"@params\" (", 1558, 0], [], [])
   Call: (259) [system] var([";;             (\"@params\" (", 1558, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@params\" (", 1558, 0], _242636, [], _231436)
^  Unify: (258) [user] subst_vars([";;             (\"@params\" (", 1558, 0], [_246372|_246374], [], _231436)
^  Call: (259) [user] subst_vars(";;             (\"@params\" (", _246372, [], _247312)
^  Unify: (259) [user] subst_vars(";;             (\"@params\" (", ";;             (\"@params\" (", [], [])
   Call: (260) [system] var(";;             (\"@params\" (")
^  Redo: (259) [user] subst_vars(";;             (\"@params\" (", _246372, [], _247312)
^  Unify: (259) [user] subst_vars(";;             (\"@params\" (", _246372, [], _247312)
   Call: (260) [system] atom(";;             (\"@params\" (")
^  Redo: (259) [user] subst_vars(";;             (\"@params\" (", _246372, [], _247312)
^  Unify: (259) [user] subst_vars(";;             (\"@params\" (", _246372, [], _247312)
   Call: (260) [system] compound(";;             (\"@params\" (")
^  Redo: (259) [user] subst_vars(";;             (\"@params\" (", _246372, [], _247312)
^  Unify: (259) [user] subst_vars(";;             (\"@params\" (", ";;             (\"@params\" (", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@params\" (", ";;             (\"@params\" (", [], [])
^  Call: (259) [user] subst_vars([1558, 0], _246374, [], _231436)
^  Unify: (259) [user] subst_vars([1558, 0], [1558, 0], [], [])
   Call: (260) [system] var([1558, 0])
^  Redo: (259) [user] subst_vars([1558, 0], _246374, [], _231436)
^  Unify: (259) [user] subst_vars([1558, 0], [_262244|_262246], [], _231436)
^  Call: (260) [user] subst_vars(1558, _262244, [], _263184)
^  Unify: (260) [user] subst_vars(1558, 1558, [], [])
   Call: (261) [system] var(1558)
^  Redo: (260) [user] subst_vars(1558, _262244, [], _263184)
^  Unify: (260) [user] subst_vars(1558, _262244, [], _263184)
   Call: (261) [system] atom(1558)
^  Redo: (260) [user] subst_vars(1558, _262244, [], _263184)
^  Unify: (260) [user] subst_vars(1558, _262244, [], _263184)
   Call: (261) [system] compound(1558)
^  Redo: (260) [user] subst_vars(1558, _262244, [], _263184)
^  Unify: (260) [user] subst_vars(1558, 1558, [], [])
^  Exit: (260) [user] subst_vars(1558, 1558, [], [])
^  Call: (260) [user] subst_vars([0], _262246, [], _231436)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _262246, [], _231436)
^  Unify: (260) [user] subst_vars([0], [_278116|_278118], [], _231436)
^  Call: (261) [user] subst_vars(0, _278116, [], _279056)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _278116, [], _279056)
^  Unify: (261) [user] subst_vars(0, _278116, [], _279056)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _278116, [], _279056)
^  Unify: (261) [user] subst_vars(0, _278116, [], _279056)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _278116, [], _279056)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _278118, [], _231436)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _278118, [], _231436)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1558, 0], [1558, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@params\" (", 1558, 0], [";;             (\"@params\" (", 1558, 0], [], [])
   Call: (258) [system] compound_name_arguments(_231434, '$COMMENT', [";;             (\"@params\" (", 1558, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT', [";;             (\"@params\" (", 1558, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@params\" (", 1558, 0), '$COMMENT'(";;             (\"@params\" (", 1558, 0), [], [])
   Call: (257) [system] _301474=metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1558, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1558, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1558, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1558, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1558, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1558, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1558, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1558, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1558, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1559, 0, 56016, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$stream_position'(56016, 1559, 0, 56050)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _354212))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _354212))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _354212)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _354212)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _354212)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _354212)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _359824))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _359824))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _359824))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _359824))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _359824)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _359824)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _365410))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _365410))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _365410)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _365410)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _365410)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _365410)
   Call: (270) [system] var('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _365410)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$VAR'(_372870))
   Call: (270) [system] atom('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _365410)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _365410)
   Call: (270) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _365410)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _365410)
   Call: (270) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _365410)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _365410)
   Call: (270) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0)==[_382150, _382156]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _365410)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _365410)
   Call: (270) [system] is_list('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _365410)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _365410)
   Call: (270) [system] string('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _365410)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _365410)
   Call: (270) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
   Exit: (270) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _392352, _392354)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0], _396094)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0], _396094)
   Call: (271) [apply] apply:maplist_([";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0], _396094, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0], [_398912|_398914], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _398912)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _398912)
   Call: (273) [system] var(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _398912)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", '$VAR'(_403558))
   Call: (273) [system] atom(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _398912)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _398912)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))"==true
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _398912)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _398912)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))"==false
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _398912)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _398912)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))"==[_412838, _412844]
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _398912)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _398912)
   Call: (273) [system] is_list(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _398912)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _398912)
   Call: (273) [system] string(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
   Exit: (273) [system] string(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _398912)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _398912)
   Call: (273) [system] compound(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _398912)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _398912)
^  Call: (273) [user] symbol(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Unify: (273) [user] symbol(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
   Call: (274) [system] atom(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
   Fail: (274) [system] atom(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Fail: (273) [user] symbol(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _398912)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))"=_398912
   Exit: (273) [system] ";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))"=";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))"
^  Exit: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", ";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
   Call: (272) [apply] apply:maplist_([1559, 0], _398914, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1559, 0], [_436910|_436912], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1559, _436910)
^  Unify: (273) [user] mfix_vars1(1559, _436910)
   Call: (274) [system] var(1559)
^  Redo: (273) [user] mfix_vars1(1559, _436910)
^  Unify: (273) [user] mfix_vars1(1559, '$VAR'(_441556))
   Call: (274) [system] atom(1559)
^  Redo: (273) [user] mfix_vars1(1559, _436910)
^  Unify: (273) [user] mfix_vars1(1559, _436910)
   Call: (274) [system] 1559==true
^  Redo: (273) [user] mfix_vars1(1559, _436910)
^  Unify: (273) [user] mfix_vars1(1559, _436910)
   Call: (274) [system] 1559==false
^  Redo: (273) [user] mfix_vars1(1559, _436910)
^  Unify: (273) [user] mfix_vars1(1559, _436910)
   Call: (274) [system] 1559==[_450836, _450842]
^  Redo: (273) [user] mfix_vars1(1559, _436910)
^  Unify: (273) [user] mfix_vars1(1559, _436910)
   Call: (274) [system] is_list(1559)
^  Redo: (273) [user] mfix_vars1(1559, _436910)
^  Unify: (273) [user] mfix_vars1(1559, _436910)
   Call: (274) [system] string(1559)
^  Redo: (273) [user] mfix_vars1(1559, _436910)
^  Unify: (273) [user] mfix_vars1(1559, _436910)
   Call: (274) [system] compound(1559)
^  Redo: (273) [user] mfix_vars1(1559, _436910)
^  Unify: (273) [user] mfix_vars1(1559, _436910)
^  Call: (274) [user] symbol(1559)
^  Unify: (274) [user] symbol(1559)
   Call: (275) [system] atom(1559)
   Fail: (275) [system] atom(1559)
^  Fail: (274) [user] symbol(1559)
^  Redo: (273) [user] mfix_vars1(1559, _436910)
   Call: (274) [system] 1559=_436910
   Exit: (274) [system] 1559=1559
^  Exit: (273) [user] mfix_vars1(1559, 1559)
   Call: (273) [apply] apply:maplist_([0], _436912, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_471236|_471238], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _471236)
^  Unify: (274) [user] mfix_vars1(0, _471236)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _471236)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_475882))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _471236)
^  Unify: (274) [user] mfix_vars1(0, _471236)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _471236)
^  Unify: (274) [user] mfix_vars1(0, _471236)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _471236)
^  Unify: (274) [user] mfix_vars1(0, _471236)
   Call: (275) [system] 0==[_485162, _485168]
^  Redo: (274) [user] mfix_vars1(0, _471236)
^  Unify: (274) [user] mfix_vars1(0, _471236)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _471236)
^  Unify: (274) [user] mfix_vars1(0, _471236)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _471236)
^  Unify: (274) [user] mfix_vars1(0, _471236)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _471236)
^  Unify: (274) [user] mfix_vars1(0, _471236)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _471236)
   Call: (275) [system] 0=_471236
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _471238, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1559, 0], [1559, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0], [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0], [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0])
   Call: (270) [system] compound_name_arguments(_365410, '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0)))
   Call: (267) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _359824)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _521410))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _521410))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _5986))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _5986))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _5986)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _5986)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _9144))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _9144))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _9144)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _9144)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _9144)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0)))
   Call: (267) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _5986)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _5964))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _5964))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _5964))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _5964))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _5964)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _5964)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _31464))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _31464))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _31464)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _31464)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _31464)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0)))
   Call: (267) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _5964)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0)))
   Call: (261) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _60242, [], _60244)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _60242, [], _60244)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _60242, [], _60244)
   Call: (258) [system] atom('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _60242, [], _60244)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _60242, [], _60244)
   Call: (258) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
   Exit: (258) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), _69558, _69560)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0])
^  Call: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0], _71444, [], _60244)
^  Unify: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0], [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0], [], [])
   Call: (259) [system] var([";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0])
^  Redo: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0], _71444, [], _60244)
^  Unify: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0], [_75180|_75182], [], _60244)
^  Call: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _75180, [], _76120)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", ";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", [], [])
   Call: (260) [system] var(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _75180, [], _76120)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _75180, [], _76120)
   Call: (260) [system] atom(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _75180, [], _76120)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _75180, [], _76120)
   Call: (260) [system] compound(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _75180, [], _76120)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", ";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", [], [])
^  Exit: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", ";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", [], [])
^  Call: (259) [user] subst_vars([1559, 0], _75182, [], _60244)
^  Unify: (259) [user] subst_vars([1559, 0], [1559, 0], [], [])
   Call: (260) [system] var([1559, 0])
^  Redo: (259) [user] subst_vars([1559, 0], _75182, [], _60244)
^  Unify: (259) [user] subst_vars([1559, 0], [_91052|_91054], [], _60244)
^  Call: (260) [user] subst_vars(1559, _91052, [], _91992)
^  Unify: (260) [user] subst_vars(1559, 1559, [], [])
   Call: (261) [system] var(1559)
^  Redo: (260) [user] subst_vars(1559, _91052, [], _91992)
^  Unify: (260) [user] subst_vars(1559, _91052, [], _91992)
   Call: (261) [system] atom(1559)
^  Redo: (260) [user] subst_vars(1559, _91052, [], _91992)
^  Unify: (260) [user] subst_vars(1559, _91052, [], _91992)
   Call: (261) [system] compound(1559)
^  Redo: (260) [user] subst_vars(1559, _91052, [], _91992)
^  Unify: (260) [user] subst_vars(1559, 1559, [], [])
^  Exit: (260) [user] subst_vars(1559, 1559, [], [])
^  Call: (260) [user] subst_vars([0], _91054, [], _60244)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _91054, [], _60244)
^  Unify: (260) [user] subst_vars([0], [_106924|_106926], [], _60244)
^  Call: (261) [user] subst_vars(0, _106924, [], _107864)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _106924, [], _107864)
^  Unify: (261) [user] subst_vars(0, _106924, [], _107864)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _106924, [], _107864)
^  Unify: (261) [user] subst_vars(0, _106924, [], _107864)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _106924, [], _107864)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _106926, [], _60244)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _106926, [], _60244)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1559, 0], [1559, 0], [], [])
^  Exit: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0], [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0], [], [])
   Call: (258) [system] compound_name_arguments(_60242, '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), [], [])
   Call: (257) [system] _130282=metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1559, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1560, 0, 56111, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$stream_position'(56111, 1560, 0, 56145)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _183022))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _183022))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _183022)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _183022)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _183022)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _183022)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _188634))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _188634))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _188634))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _188634))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _188634)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _188634)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _194220))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _194220))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _194220)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _194220)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _194220)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _194220)
   Call: (270) [system] var('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _194220)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$VAR'(_201680))
   Call: (270) [system] atom('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _194220)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _194220)
   Call: (270) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _194220)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _194220)
   Call: (270) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _194220)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _194220)
   Call: (270) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0)==[_210960, _210966]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _194220)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _194220)
   Call: (270) [system] is_list('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _194220)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _194220)
   Call: (270) [system] string('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _194220)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _194220)
   Call: (270) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
   Exit: (270) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _221162, _221164)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0], _224904)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0], _224904)
   Call: (271) [apply] apply:maplist_([";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0], _224904, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0], [_227722|_227724], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _227722)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _227722)
   Call: (273) [system] var(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _227722)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", '$VAR'(_232368))
   Call: (273) [system] atom(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _227722)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _227722)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))"==true
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _227722)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _227722)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))"==false
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _227722)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _227722)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))"==[_241648, _241654]
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _227722)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _227722)
   Call: (273) [system] is_list(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _227722)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _227722)
   Call: (273) [system] string(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
   Exit: (273) [system] string(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _227722)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _227722)
   Call: (273) [system] compound(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _227722)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _227722)
^  Call: (273) [user] symbol(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Unify: (273) [user] symbol(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
   Call: (274) [system] atom(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
   Fail: (274) [system] atom(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Fail: (273) [user] symbol(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _227722)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))"=_227722
   Exit: (273) [system] ";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))"=";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))"
^  Exit: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", ";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
   Call: (272) [apply] apply:maplist_([1560, 0], _227724, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1560, 0], [_265720|_265722], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1560, _265720)
^  Unify: (273) [user] mfix_vars1(1560, _265720)
   Call: (274) [system] var(1560)
^  Redo: (273) [user] mfix_vars1(1560, _265720)
^  Unify: (273) [user] mfix_vars1(1560, '$VAR'(_270366))
   Call: (274) [system] atom(1560)
^  Redo: (273) [user] mfix_vars1(1560, _265720)
^  Unify: (273) [user] mfix_vars1(1560, _265720)
   Call: (274) [system] 1560==true
^  Redo: (273) [user] mfix_vars1(1560, _265720)
^  Unify: (273) [user] mfix_vars1(1560, _265720)
   Call: (274) [system] 1560==false
^  Redo: (273) [user] mfix_vars1(1560, _265720)
^  Unify: (273) [user] mfix_vars1(1560, _265720)
   Call: (274) [system] 1560==[_279646, _279652]
^  Redo: (273) [user] mfix_vars1(1560, _265720)
^  Unify: (273) [user] mfix_vars1(1560, _265720)
   Call: (274) [system] is_list(1560)
^  Redo: (273) [user] mfix_vars1(1560, _265720)
^  Unify: (273) [user] mfix_vars1(1560, _265720)
   Call: (274) [system] string(1560)
^  Redo: (273) [user] mfix_vars1(1560, _265720)
^  Unify: (273) [user] mfix_vars1(1560, _265720)
   Call: (274) [system] compound(1560)
^  Redo: (273) [user] mfix_vars1(1560, _265720)
^  Unify: (273) [user] mfix_vars1(1560, _265720)
^  Call: (274) [user] symbol(1560)
^  Unify: (274) [user] symbol(1560)
   Call: (275) [system] atom(1560)
   Fail: (275) [system] atom(1560)
^  Fail: (274) [user] symbol(1560)
^  Redo: (273) [user] mfix_vars1(1560, _265720)
   Call: (274) [system] 1560=_265720
   Exit: (274) [system] 1560=1560
^  Exit: (273) [user] mfix_vars1(1560, 1560)
   Call: (273) [apply] apply:maplist_([0], _265722, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_300046|_300048], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _300046)
^  Unify: (274) [user] mfix_vars1(0, _300046)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _300046)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_304692))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _300046)
^  Unify: (274) [user] mfix_vars1(0, _300046)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _300046)
^  Unify: (274) [user] mfix_vars1(0, _300046)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _300046)
^  Unify: (274) [user] mfix_vars1(0, _300046)
   Call: (275) [system] 0==[_313972, _313978]
^  Redo: (274) [user] mfix_vars1(0, _300046)
^  Unify: (274) [user] mfix_vars1(0, _300046)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _300046)
^  Unify: (274) [user] mfix_vars1(0, _300046)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _300046)
^  Unify: (274) [user] mfix_vars1(0, _300046)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _300046)
^  Unify: (274) [user] mfix_vars1(0, _300046)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _300046)
   Call: (275) [system] 0=_300046
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _300048, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1560, 0], [1560, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0], [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0], [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0])
   Call: (270) [system] compound_name_arguments(_194220, '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0)))
   Call: (267) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _188634)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _350220))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _350220))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _350220))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _350220))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _350220)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _350220)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _355806))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _355806))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _355806)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _355806)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _355806)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0)))
   Call: (267) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _350220)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _183022))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _183022))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _183022))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _183022))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _183022)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _183022)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _378126))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _378126))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _378126)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _378126)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _378126)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0)))
   Call: (267) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _183022)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0)))
   Call: (261) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _406904, [], _406906)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _406904, [], _406906)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _406904, [], _406906)
   Call: (258) [system] atom('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _406904, [], _406906)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _406904, [], _406906)
   Call: (258) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
   Exit: (258) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), _416220, _416222)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0])
^  Call: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0], _418106, [], _406906)
^  Unify: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0], [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0], [], [])
   Call: (259) [system] var([";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0])
^  Redo: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0], _418106, [], _406906)
^  Unify: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0], [_421842|_421844], [], _406906)
^  Call: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _421842, [], _422782)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", ";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", [], [])
   Call: (260) [system] var(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _421842, [], _422782)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _421842, [], _422782)
   Call: (260) [system] atom(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _421842, [], _422782)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _421842, [], _422782)
   Call: (260) [system] compound(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _421842, [], _422782)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", ";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", [], [])
^  Exit: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", ";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", [], [])
^  Call: (259) [user] subst_vars([1560, 0], _421844, [], _406906)
^  Unify: (259) [user] subst_vars([1560, 0], [1560, 0], [], [])
   Call: (260) [system] var([1560, 0])
^  Redo: (259) [user] subst_vars([1560, 0], _421844, [], _406906)
^  Unify: (259) [user] subst_vars([1560, 0], [_437714|_437716], [], _406906)
^  Call: (260) [user] subst_vars(1560, _437714, [], _438654)
^  Unify: (260) [user] subst_vars(1560, 1560, [], [])
   Call: (261) [system] var(1560)
^  Redo: (260) [user] subst_vars(1560, _437714, [], _438654)
^  Unify: (260) [user] subst_vars(1560, _437714, [], _438654)
   Call: (261) [system] atom(1560)
^  Redo: (260) [user] subst_vars(1560, _437714, [], _438654)
^  Unify: (260) [user] subst_vars(1560, _437714, [], _438654)
   Call: (261) [system] compound(1560)
^  Redo: (260) [user] subst_vars(1560, _437714, [], _438654)
^  Unify: (260) [user] subst_vars(1560, 1560, [], [])
^  Exit: (260) [user] subst_vars(1560, 1560, [], [])
^  Call: (260) [user] subst_vars([0], _437716, [], _406906)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _437716, [], _406906)
^  Unify: (260) [user] subst_vars([0], [_453586|_453588], [], _406906)
^  Call: (261) [user] subst_vars(0, _453586, [], _454526)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _453586, [], _454526)
^  Unify: (261) [user] subst_vars(0, _453586, [], _454526)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _453586, [], _454526)
^  Unify: (261) [user] subst_vars(0, _453586, [], _454526)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _453586, [], _454526)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _453588, [], _406906)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _453588, [], _406906)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1560, 0], [1560, 0], [], [])
^  Exit: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0], [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0], [], [])
   Call: (258) [system] compound_name_arguments(_406904, '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), [], [])
   Call: (257) [system] _476944=metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1560, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1561, 0, 56210, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$stream_position'(56210, 1561, 0, 56244)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _11566))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _11566))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _11566)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _11566)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _11566)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _11566)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _17178))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _17178))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _17178))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _17178))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _17178)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _17178)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _22764))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _22764))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _22764)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _22764)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _22764)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _22764)
   Call: (270) [system] var('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _22764)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$VAR'(_30224))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _22764)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _22764)
   Call: (270) [system] '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _22764)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _22764)
   Call: (270) [system] '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _22764)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _22764)
   Call: (270) [system] '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0)==[_39504, _39510]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _22764)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _22764)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _22764)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _22764)
   Call: (270) [system] string('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _22764)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _22764)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _49706, _49708)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT', [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0], _53448)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0], _53448)
   Call: (271) [apply] apply:maplist_([";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0], _53448, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0], [_56266|_56268], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _56266)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _56266)
   Call: (273) [system] var(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _56266)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", '$VAR'(_60912))
   Call: (273) [system] atom(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _56266)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _56266)
   Call: (273) [system] ";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _56266)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _56266)
   Call: (273) [system] ";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _56266)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _56266)
   Call: (273) [system] ";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],"==[_70192, _70198]
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _56266)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _56266)
   Call: (273) [system] is_list(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _56266)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _56266)
   Call: (273) [system] string(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
   Exit: (273) [system] string(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _56266)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _56266)
   Call: (273) [system] compound(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _56266)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _56266)
^  Call: (273) [user] symbol(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Unify: (273) [user] symbol(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
   Call: (274) [system] atom(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
   Fail: (274) [system] atom(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Fail: (273) [user] symbol(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _56266)
   Call: (273) [system] ";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],"=_56266
   Exit: (273) [system] ";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],"=";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],"
^  Exit: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", ";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
   Call: (272) [apply] apply:maplist_([1561, 0], _56268, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1561, 0], [_94264|_94266], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1561, _94264)
^  Unify: (273) [user] mfix_vars1(1561, _94264)
   Call: (274) [system] var(1561)
^  Redo: (273) [user] mfix_vars1(1561, _94264)
^  Unify: (273) [user] mfix_vars1(1561, '$VAR'(_98910))
   Call: (274) [system] atom(1561)
^  Redo: (273) [user] mfix_vars1(1561, _94264)
^  Unify: (273) [user] mfix_vars1(1561, _94264)
   Call: (274) [system] 1561==true
^  Redo: (273) [user] mfix_vars1(1561, _94264)
^  Unify: (273) [user] mfix_vars1(1561, _94264)
   Call: (274) [system] 1561==false
^  Redo: (273) [user] mfix_vars1(1561, _94264)
^  Unify: (273) [user] mfix_vars1(1561, _94264)
   Call: (274) [system] 1561==[_108190, _108196]
^  Redo: (273) [user] mfix_vars1(1561, _94264)
^  Unify: (273) [user] mfix_vars1(1561, _94264)
   Call: (274) [system] is_list(1561)
^  Redo: (273) [user] mfix_vars1(1561, _94264)
^  Unify: (273) [user] mfix_vars1(1561, _94264)
   Call: (274) [system] string(1561)
^  Redo: (273) [user] mfix_vars1(1561, _94264)
^  Unify: (273) [user] mfix_vars1(1561, _94264)
   Call: (274) [system] compound(1561)
^  Redo: (273) [user] mfix_vars1(1561, _94264)
^  Unify: (273) [user] mfix_vars1(1561, _94264)
^  Call: (274) [user] symbol(1561)
^  Unify: (274) [user] symbol(1561)
   Call: (275) [system] atom(1561)
   Fail: (275) [system] atom(1561)
^  Fail: (274) [user] symbol(1561)
^  Redo: (273) [user] mfix_vars1(1561, _94264)
   Call: (274) [system] 1561=_94264
   Exit: (274) [system] 1561=1561
^  Exit: (273) [user] mfix_vars1(1561, 1561)
   Call: (273) [apply] apply:maplist_([0], _94266, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_128590|_128592], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _128590)
^  Unify: (274) [user] mfix_vars1(0, _128590)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _128590)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_133236))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _128590)
^  Unify: (274) [user] mfix_vars1(0, _128590)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _128590)
^  Unify: (274) [user] mfix_vars1(0, _128590)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _128590)
^  Unify: (274) [user] mfix_vars1(0, _128590)
   Call: (275) [system] 0==[_142516, _142522]
^  Redo: (274) [user] mfix_vars1(0, _128590)
^  Unify: (274) [user] mfix_vars1(0, _128590)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _128590)
^  Unify: (274) [user] mfix_vars1(0, _128590)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _128590)
^  Unify: (274) [user] mfix_vars1(0, _128590)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _128590)
^  Unify: (274) [user] mfix_vars1(0, _128590)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _128590)
   Call: (275) [system] 0=_128590
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _128592, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1561, 0], [1561, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0], [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0], [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0])
   Call: (270) [system] compound_name_arguments(_22764, '$COMMENT', [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT', [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0)\=@='$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _17178)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _178764))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _178764))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _178764))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _178764))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _178764)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _178764)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _184350))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _184350))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _184350)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _184350)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _184350)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0)\=@='$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _178764)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _11566))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _11566))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _11566))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _11566))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _11566)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _11566)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _206670))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _206670))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _206670)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _206670)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _206670)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0)\=@='$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _11566)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0)\=@='$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _235448, [], _235450)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _235448, [], _235450)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _235448, [], _235450)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _235448, [], _235450)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _235448, [], _235450)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), _244764, _244766)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT', [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0])
^  Call: (258) [user] subst_vars([";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0], _246650, [], _235450)
^  Unify: (258) [user] subst_vars([";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0], [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0], [], [])
   Call: (259) [system] var([";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0], _246650, [], _235450)
^  Unify: (258) [user] subst_vars([";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0], [_250386|_250388], [], _235450)
^  Call: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _250386, [], _251326)
^  Unify: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", ";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", [], [])
   Call: (260) [system] var(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _250386, [], _251326)
^  Unify: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _250386, [], _251326)
   Call: (260) [system] atom(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _250386, [], _251326)
^  Unify: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _250386, [], _251326)
   Call: (260) [system] compound(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _250386, [], _251326)
^  Unify: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", ";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", ";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", [], [])
^  Call: (259) [user] subst_vars([1561, 0], _250388, [], _235450)
^  Unify: (259) [user] subst_vars([1561, 0], [1561, 0], [], [])
   Call: (260) [system] var([1561, 0])
^  Redo: (259) [user] subst_vars([1561, 0], _250388, [], _235450)
^  Unify: (259) [user] subst_vars([1561, 0], [_266258|_266260], [], _235450)
^  Call: (260) [user] subst_vars(1561, _266258, [], _267198)
^  Unify: (260) [user] subst_vars(1561, 1561, [], [])
   Call: (261) [system] var(1561)
^  Redo: (260) [user] subst_vars(1561, _266258, [], _267198)
^  Unify: (260) [user] subst_vars(1561, _266258, [], _267198)
   Call: (261) [system] atom(1561)
^  Redo: (260) [user] subst_vars(1561, _266258, [], _267198)
^  Unify: (260) [user] subst_vars(1561, _266258, [], _267198)
   Call: (261) [system] compound(1561)
^  Redo: (260) [user] subst_vars(1561, _266258, [], _267198)
^  Unify: (260) [user] subst_vars(1561, 1561, [], [])
^  Exit: (260) [user] subst_vars(1561, 1561, [], [])
^  Call: (260) [user] subst_vars([0], _266260, [], _235450)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _266260, [], _235450)
^  Unify: (260) [user] subst_vars([0], [_282130|_282132], [], _235450)
^  Call: (261) [user] subst_vars(0, _282130, [], _283070)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _282130, [], _283070)
^  Unify: (261) [user] subst_vars(0, _282130, [], _283070)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _282130, [], _283070)
^  Unify: (261) [user] subst_vars(0, _282130, [], _283070)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _282130, [], _283070)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _282132, [], _235450)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _282132, [], _235450)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1561, 0], [1561, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0], [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0], [], [])
   Call: (258) [system] compound_name_arguments(_235448, '$COMMENT', [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT', [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), [], [])
   Call: (257) [system] _305488=metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1561, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1562, 0, 56305, '$COMMENT'(";;     ]));", 1562, 0), '$stream_position'(56305, 1562, 0, 56339)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1562, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1562, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     ]));", 1562, 0), _358206))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     ]));", 1562, 0), _358206))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     ]));", 1562, 0), _358206)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     ]));", 1562, 0), _358206)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     ]));", 1562, 0), _358206)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     ]));", 1562, 0), _358206)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     ]));", 1562, 0), _363818))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1562, 0), _363818))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1562, 0), _363818))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1562, 0), _363818))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1562, 0), _363818)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1562, 0), _363818)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     ]));", 1562, 0), _369404))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     ]));", 1562, 0), _369404))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     ]));", 1562, 0), _369404)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     ]));", 1562, 0), _369404)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1562, 0), _369404)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1562, 0), _369404)
   Call: (270) [system] var('$COMMENT'(";;     ]));", 1562, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1562, 0), _369404)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1562, 0), '$VAR'(_376864))
   Call: (270) [system] atom('$COMMENT'(";;     ]));", 1562, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1562, 0), _369404)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1562, 0), _369404)
   Call: (270) [system] '$COMMENT'(";;     ]));", 1562, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1562, 0), _369404)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1562, 0), _369404)
   Call: (270) [system] '$COMMENT'(";;     ]));", 1562, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1562, 0), _369404)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1562, 0), _369404)
   Call: (270) [system] '$COMMENT'(";;     ]));", 1562, 0)==[_386144, _386150]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1562, 0), _369404)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1562, 0), _369404)
   Call: (270) [system] is_list('$COMMENT'(";;     ]));", 1562, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1562, 0), _369404)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1562, 0), _369404)
   Call: (270) [system] string('$COMMENT'(";;     ]));", 1562, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1562, 0), _369404)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1562, 0), _369404)
   Call: (270) [system] compound('$COMMENT'(";;     ]));", 1562, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     ]));", 1562, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1562, 0), _396346, _396348)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1562, 0), '$COMMENT', [";;     ]));", 1562, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     ]));", 1562, 0], _400088)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     ]));", 1562, 0], _400088)
   Call: (271) [apply] apply:maplist_([";;     ]));", 1562, 0], _400088, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     ]));", 1562, 0], [_402906|_402908], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     ]));", _402906)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _402906)
   Call: (273) [system] var(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _402906)
^  Unify: (272) [user] mfix_vars1(";;     ]));", '$VAR'(_407552))
   Call: (273) [system] atom(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _402906)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _402906)
   Call: (273) [system] ";;     ]));"==true
^  Redo: (272) [user] mfix_vars1(";;     ]));", _402906)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _402906)
   Call: (273) [system] ";;     ]));"==false
^  Redo: (272) [user] mfix_vars1(";;     ]));", _402906)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _402906)
   Call: (273) [system] ";;     ]));"==[_416832, _416838]
^  Redo: (272) [user] mfix_vars1(";;     ]));", _402906)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _402906)
   Call: (273) [system] is_list(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _402906)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _402906)
   Call: (273) [system] string(";;     ]));")
   Exit: (273) [system] string(";;     ]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     ]));", _402906)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _402906)
   Call: (273) [system] compound(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _402906)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _402906)
^  Call: (273) [user] symbol(";;     ]));")
^  Unify: (273) [user] symbol(";;     ]));")
   Call: (274) [system] atom(";;     ]));")
   Fail: (274) [system] atom(";;     ]));")
^  Fail: (273) [user] symbol(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _402906)
   Call: (273) [system] ";;     ]));"=_402906
   Exit: (273) [system] ";;     ]));"=";;     ]));"
^  Exit: (272) [user] mfix_vars1(";;     ]));", ";;     ]));")
   Call: (272) [apply] apply:maplist_([1562, 0], _402908, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1562, 0], [_440904|_440906], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1562, _440904)
^  Unify: (273) [user] mfix_vars1(1562, _440904)
   Call: (274) [system] var(1562)
^  Redo: (273) [user] mfix_vars1(1562, _440904)
^  Unify: (273) [user] mfix_vars1(1562, '$VAR'(_445550))
   Call: (274) [system] atom(1562)
^  Redo: (273) [user] mfix_vars1(1562, _440904)
^  Unify: (273) [user] mfix_vars1(1562, _440904)
   Call: (274) [system] 1562==true
^  Redo: (273) [user] mfix_vars1(1562, _440904)
^  Unify: (273) [user] mfix_vars1(1562, _440904)
   Call: (274) [system] 1562==false
^  Redo: (273) [user] mfix_vars1(1562, _440904)
^  Unify: (273) [user] mfix_vars1(1562, _440904)
   Call: (274) [system] 1562==[_454830, _454836]
^  Redo: (273) [user] mfix_vars1(1562, _440904)
^  Unify: (273) [user] mfix_vars1(1562, _440904)
   Call: (274) [system] is_list(1562)
^  Redo: (273) [user] mfix_vars1(1562, _440904)
^  Unify: (273) [user] mfix_vars1(1562, _440904)
   Call: (274) [system] string(1562)
^  Redo: (273) [user] mfix_vars1(1562, _440904)
^  Unify: (273) [user] mfix_vars1(1562, _440904)
   Call: (274) [system] compound(1562)
^  Redo: (273) [user] mfix_vars1(1562, _440904)
^  Unify: (273) [user] mfix_vars1(1562, _440904)
^  Call: (274) [user] symbol(1562)
^  Unify: (274) [user] symbol(1562)
   Call: (275) [system] atom(1562)
   Fail: (275) [system] atom(1562)
^  Fail: (274) [user] symbol(1562)
^  Redo: (273) [user] mfix_vars1(1562, _440904)
   Call: (274) [system] 1562=_440904
   Exit: (274) [system] 1562=1562
^  Exit: (273) [user] mfix_vars1(1562, 1562)
   Call: (273) [apply] apply:maplist_([0], _440906, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_475230|_475232], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _475230)
^  Unify: (274) [user] mfix_vars1(0, _475230)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _475230)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_479876))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _475230)
^  Unify: (274) [user] mfix_vars1(0, _475230)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _475230)
^  Unify: (274) [user] mfix_vars1(0, _475230)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _475230)
^  Unify: (274) [user] mfix_vars1(0, _475230)
   Call: (275) [system] 0==[_489156, _489162]
^  Redo: (274) [user] mfix_vars1(0, _475230)
^  Unify: (274) [user] mfix_vars1(0, _475230)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _475230)
^  Unify: (274) [user] mfix_vars1(0, _475230)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _475230)
^  Unify: (274) [user] mfix_vars1(0, _475230)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _475230)
^  Unify: (274) [user] mfix_vars1(0, _475230)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _475230)
   Call: (275) [system] 0=_475230
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _475232, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1562, 0], [1562, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     ]));", 1562, 0], [";;     ]));", 1562, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     ]));", 1562, 0], [";;     ]));", 1562, 0])
   Call: (270) [system] compound_name_arguments(_369404, '$COMMENT', [";;     ]));", 1562, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1562, 0), '$COMMENT', [";;     ]));", 1562, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0)))
   Call: (267) [system] '$COMMENT'(";;     ]));", 1562, 0)\=@='$COMMENT'(";;     ]));", 1562, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1562, 0), _363818)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     ]));", 1562, 0), _7480))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1562, 0), _7480))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1562, 0), _7480))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1562, 0), _7480))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1562, 0), _7480)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1562, 0), _7480)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     ]));", 1562, 0), _13066))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     ]));", 1562, 0), _13066))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     ]));", 1562, 0), _13066)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     ]));", 1562, 0), _13066)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     ]));", 1562, 0), _13066)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0)))
   Call: (267) [system] '$COMMENT'(";;     ]));", 1562, 0)\=@='$COMMENT'(";;     ]));", 1562, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1562, 0), _7480)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     ]));", 1562, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1562, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1562, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1562, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1562, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1562, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     ]));", 1562, 0), _35386))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     ]));", 1562, 0), _35386))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     ]));", 1562, 0), _35386)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     ]));", 1562, 0), _35386)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     ]));", 1562, 0), _35386)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0)))
   Call: (267) [system] '$COMMENT'(";;     ]));", 1562, 0)\=@='$COMMENT'(";;     ]));", 1562, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1562, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0)))
   Call: (261) [system] '$COMMENT'(";;     ]));", 1562, 0)\=@='$COMMENT'(";;     ]));", 1562, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1562, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1562, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1562, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1562, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1562, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1562, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1562, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1562, 0), _64164, [], _64166)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     ]));", 1562, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1562, 0), _64164, [], _64166)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1562, 0), _64164, [], _64166)
   Call: (258) [system] atom('$COMMENT'(";;     ]));", 1562, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1562, 0), _64164, [], _64166)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1562, 0), _64164, [], _64166)
   Call: (258) [system] compound('$COMMENT'(";;     ]));", 1562, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     ]));", 1562, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1562, 0), _73480, _73482)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1562, 0), '$COMMENT', [";;     ]));", 1562, 0])
^  Call: (258) [user] subst_vars([";;     ]));", 1562, 0], _75366, [], _64166)
^  Unify: (258) [user] subst_vars([";;     ]));", 1562, 0], [";;     ]));", 1562, 0], [], [])
   Call: (259) [system] var([";;     ]));", 1562, 0])
^  Redo: (258) [user] subst_vars([";;     ]));", 1562, 0], _75366, [], _64166)
^  Unify: (258) [user] subst_vars([";;     ]));", 1562, 0], [_79102|_79104], [], _64166)
^  Call: (259) [user] subst_vars(";;     ]));", _79102, [], _80042)
^  Unify: (259) [user] subst_vars(";;     ]));", ";;     ]));", [], [])
   Call: (260) [system] var(";;     ]));")
^  Redo: (259) [user] subst_vars(";;     ]));", _79102, [], _80042)
^  Unify: (259) [user] subst_vars(";;     ]));", _79102, [], _80042)
   Call: (260) [system] atom(";;     ]));")
^  Redo: (259) [user] subst_vars(";;     ]));", _79102, [], _80042)
^  Unify: (259) [user] subst_vars(";;     ]));", _79102, [], _80042)
   Call: (260) [system] compound(";;     ]));")
^  Redo: (259) [user] subst_vars(";;     ]));", _79102, [], _80042)
^  Unify: (259) [user] subst_vars(";;     ]));", ";;     ]));", [], [])
^  Exit: (259) [user] subst_vars(";;     ]));", ";;     ]));", [], [])
^  Call: (259) [user] subst_vars([1562, 0], _79104, [], _64166)
^  Unify: (259) [user] subst_vars([1562, 0], [1562, 0], [], [])
   Call: (260) [system] var([1562, 0])
^  Redo: (259) [user] subst_vars([1562, 0], _79104, [], _64166)
^  Unify: (259) [user] subst_vars([1562, 0], [_94974|_94976], [], _64166)
^  Call: (260) [user] subst_vars(1562, _94974, [], _95914)
^  Unify: (260) [user] subst_vars(1562, 1562, [], [])
   Call: (261) [system] var(1562)
^  Redo: (260) [user] subst_vars(1562, _94974, [], _95914)
^  Unify: (260) [user] subst_vars(1562, _94974, [], _95914)
   Call: (261) [system] atom(1562)
^  Redo: (260) [user] subst_vars(1562, _94974, [], _95914)
^  Unify: (260) [user] subst_vars(1562, _94974, [], _95914)
   Call: (261) [system] compound(1562)
^  Redo: (260) [user] subst_vars(1562, _94974, [], _95914)
^  Unify: (260) [user] subst_vars(1562, 1562, [], [])
^  Exit: (260) [user] subst_vars(1562, 1562, [], [])
^  Call: (260) [user] subst_vars([0], _94976, [], _64166)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _94976, [], _64166)
^  Unify: (260) [user] subst_vars([0], [_110846|_110848], [], _64166)
^  Call: (261) [user] subst_vars(0, _110846, [], _111786)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _110846, [], _111786)
^  Unify: (261) [user] subst_vars(0, _110846, [], _111786)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _110846, [], _111786)
^  Unify: (261) [user] subst_vars(0, _110846, [], _111786)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _110846, [], _111786)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _110848, [], _64166)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _110848, [], _64166)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1562, 0], [1562, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     ]));", 1562, 0], [";;     ]));", 1562, 0], [], [])
   Call: (258) [system] compound_name_arguments(_64164, '$COMMENT', [";;     ]));", 1562, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1562, 0), '$COMMENT', [";;     ]));", 1562, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1562, 0), '$COMMENT'(";;     ]));", 1562, 0), [], [])
   Call: (257) [system] _134204=metta_file_buffer(+, '$COMMENT'(";;     ]));", 1562, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     ]));", 1562, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     ]));", 1562, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     ]));", 1562, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     ]));", 1562, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1562, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1562, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1562, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1562, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1563, 0, 56317, '$COMMENT'(";; }", 1563, 0), '$stream_position'(56317, 1563, 0, 56351)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1563, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1563, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; }", 1563, 0), _186920))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1563, 0), _186920))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; }", 1563, 0), _186920)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1563, 0), _186920)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1563, 0), _186920)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1563, 0), _186920)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; }", 1563, 0), _192532))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1563, 0), _192532))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1563, 0), _192532))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1563, 0), _192532))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1563, 0), _192532)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1563, 0), _192532)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; }", 1563, 0), _198118))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1563, 0), _198118))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; }", 1563, 0), _198118)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1563, 0), _198118)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; }", 1563, 0), _198118)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1563, 0), _198118)
   Call: (270) [system] var('$COMMENT'(";; }", 1563, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1563, 0), _198118)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1563, 0), '$VAR'(_205578))
   Call: (270) [system] atom('$COMMENT'(";; }", 1563, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1563, 0), _198118)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1563, 0), _198118)
   Call: (270) [system] '$COMMENT'(";; }", 1563, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1563, 0), _198118)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1563, 0), _198118)
   Call: (270) [system] '$COMMENT'(";; }", 1563, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1563, 0), _198118)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1563, 0), _198118)
   Call: (270) [system] '$COMMENT'(";; }", 1563, 0)==[_214858, _214864]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1563, 0), _198118)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1563, 0), _198118)
   Call: (270) [system] is_list('$COMMENT'(";; }", 1563, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1563, 0), _198118)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1563, 0), _198118)
   Call: (270) [system] string('$COMMENT'(";; }", 1563, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1563, 0), _198118)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1563, 0), _198118)
   Call: (270) [system] compound('$COMMENT'(";; }", 1563, 0))
   Exit: (270) [system] compound('$COMMENT'(";; }", 1563, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1563, 0), _225060, _225062)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1563, 0), '$COMMENT', [";; }", 1563, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; }", 1563, 0], _228802)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1563, 0], _228802)
   Call: (271) [apply] apply:maplist_([";; }", 1563, 0], _228802, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; }", 1563, 0], [_231620|_231622], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; }", _231620)
^  Unify: (272) [user] mfix_vars1(";; }", _231620)
   Call: (273) [system] var(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _231620)
^  Unify: (272) [user] mfix_vars1(";; }", '$VAR'(_236266))
   Call: (273) [system] atom(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _231620)
^  Unify: (272) [user] mfix_vars1(";; }", _231620)
   Call: (273) [system] ";; }"==true
^  Redo: (272) [user] mfix_vars1(";; }", _231620)
^  Unify: (272) [user] mfix_vars1(";; }", _231620)
   Call: (273) [system] ";; }"==false
^  Redo: (272) [user] mfix_vars1(";; }", _231620)
^  Unify: (272) [user] mfix_vars1(";; }", _231620)
   Call: (273) [system] ";; }"==[_245546, _245552]
^  Redo: (272) [user] mfix_vars1(";; }", _231620)
^  Unify: (272) [user] mfix_vars1(";; }", _231620)
   Call: (273) [system] is_list(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _231620)
^  Unify: (272) [user] mfix_vars1(";; }", _231620)
   Call: (273) [system] string(";; }")
   Exit: (273) [system] string(";; }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; }", _231620)
^  Unify: (272) [user] mfix_vars1(";; }", _231620)
   Call: (273) [system] compound(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _231620)
^  Unify: (272) [user] mfix_vars1(";; }", _231620)
^  Call: (273) [user] symbol(";; }")
^  Unify: (273) [user] symbol(";; }")
   Call: (274) [system] atom(";; }")
   Fail: (274) [system] atom(";; }")
^  Fail: (273) [user] symbol(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _231620)
   Call: (273) [system] ";; }"=_231620
   Exit: (273) [system] ";; }"=";; }"
^  Exit: (272) [user] mfix_vars1(";; }", ";; }")
   Call: (272) [apply] apply:maplist_([1563, 0], _231622, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1563, 0], [_269618|_269620], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1563, _269618)
^  Unify: (273) [user] mfix_vars1(1563, _269618)
   Call: (274) [system] var(1563)
^  Redo: (273) [user] mfix_vars1(1563, _269618)
^  Unify: (273) [user] mfix_vars1(1563, '$VAR'(_274264))
   Call: (274) [system] atom(1563)
^  Redo: (273) [user] mfix_vars1(1563, _269618)
^  Unify: (273) [user] mfix_vars1(1563, _269618)
   Call: (274) [system] 1563==true
^  Redo: (273) [user] mfix_vars1(1563, _269618)
^  Unify: (273) [user] mfix_vars1(1563, _269618)
   Call: (274) [system] 1563==false
^  Redo: (273) [user] mfix_vars1(1563, _269618)
^  Unify: (273) [user] mfix_vars1(1563, _269618)
   Call: (274) [system] 1563==[_283544, _283550]
^  Redo: (273) [user] mfix_vars1(1563, _269618)
^  Unify: (273) [user] mfix_vars1(1563, _269618)
   Call: (274) [system] is_list(1563)
^  Redo: (273) [user] mfix_vars1(1563, _269618)
^  Unify: (273) [user] mfix_vars1(1563, _269618)
   Call: (274) [system] string(1563)
^  Redo: (273) [user] mfix_vars1(1563, _269618)
^  Unify: (273) [user] mfix_vars1(1563, _269618)
   Call: (274) [system] compound(1563)
^  Redo: (273) [user] mfix_vars1(1563, _269618)
^  Unify: (273) [user] mfix_vars1(1563, _269618)
^  Call: (274) [user] symbol(1563)
^  Unify: (274) [user] symbol(1563)
   Call: (275) [system] atom(1563)
   Fail: (275) [system] atom(1563)
^  Fail: (274) [user] symbol(1563)
^  Redo: (273) [user] mfix_vars1(1563, _269618)
   Call: (274) [system] 1563=_269618
   Exit: (274) [system] 1563=1563
^  Exit: (273) [user] mfix_vars1(1563, 1563)
   Call: (273) [apply] apply:maplist_([0], _269620, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_303944|_303946], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _303944)
^  Unify: (274) [user] mfix_vars1(0, _303944)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _303944)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_308590))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _303944)
^  Unify: (274) [user] mfix_vars1(0, _303944)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _303944)
^  Unify: (274) [user] mfix_vars1(0, _303944)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _303944)
^  Unify: (274) [user] mfix_vars1(0, _303944)
   Call: (275) [system] 0==[_317870, _317876]
^  Redo: (274) [user] mfix_vars1(0, _303944)
^  Unify: (274) [user] mfix_vars1(0, _303944)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _303944)
^  Unify: (274) [user] mfix_vars1(0, _303944)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _303944)
^  Unify: (274) [user] mfix_vars1(0, _303944)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _303944)
^  Unify: (274) [user] mfix_vars1(0, _303944)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _303944)
   Call: (275) [system] 0=_303944
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _303946, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1563, 0], [1563, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; }", 1563, 0], [";; }", 1563, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1563, 0], [";; }", 1563, 0])
   Call: (270) [system] compound_name_arguments(_198118, '$COMMENT', [";; }", 1563, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1563, 0), '$COMMENT', [";; }", 1563, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1563, 0)\=@='$COMMENT'(";; }", 1563, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1563, 0), _192532)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; }", 1563, 0), _354118))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1563, 0), _354118))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1563, 0), _354118))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1563, 0), _354118))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1563, 0), _354118)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1563, 0), _354118)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; }", 1563, 0), _359704))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1563, 0), _359704))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; }", 1563, 0), _359704)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1563, 0), _359704)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; }", 1563, 0), _359704)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1563, 0)\=@='$COMMENT'(";; }", 1563, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1563, 0), _354118)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; }", 1563, 0), _186920))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1563, 0), _186920))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1563, 0), _186920))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1563, 0), _186920))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1563, 0), _186920)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1563, 0), _186920)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; }", 1563, 0), _382024))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1563, 0), _382024))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; }", 1563, 0), _382024)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1563, 0), _382024)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; }", 1563, 0), _382024)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1563, 0)\=@='$COMMENT'(";; }", 1563, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1563, 0), _186920)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0)))
   Call: (261) [system] '$COMMENT'(";; }", 1563, 0)\=@='$COMMENT'(";; }", 1563, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1563, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1563, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1563, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1563, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1563, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; }", 1563, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; }", 1563, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; }", 1563, 0), _410802, [], _410804)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; }", 1563, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1563, 0), _410802, [], _410804)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1563, 0), _410802, [], _410804)
   Call: (258) [system] atom('$COMMENT'(";; }", 1563, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1563, 0), _410802, [], _410804)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1563, 0), _410802, [], _410804)
   Call: (258) [system] compound('$COMMENT'(";; }", 1563, 0))
   Exit: (258) [system] compound('$COMMENT'(";; }", 1563, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1563, 0), _420118, _420120)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1563, 0), '$COMMENT', [";; }", 1563, 0])
^  Call: (258) [user] subst_vars([";; }", 1563, 0], _422004, [], _410804)
^  Unify: (258) [user] subst_vars([";; }", 1563, 0], [";; }", 1563, 0], [], [])
   Call: (259) [system] var([";; }", 1563, 0])
^  Redo: (258) [user] subst_vars([";; }", 1563, 0], _422004, [], _410804)
^  Unify: (258) [user] subst_vars([";; }", 1563, 0], [_425740|_425742], [], _410804)
^  Call: (259) [user] subst_vars(";; }", _425740, [], _426680)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
   Call: (260) [system] var(";; }")
^  Redo: (259) [user] subst_vars(";; }", _425740, [], _426680)
^  Unify: (259) [user] subst_vars(";; }", _425740, [], _426680)
   Call: (260) [system] atom(";; }")
^  Redo: (259) [user] subst_vars(";; }", _425740, [], _426680)
^  Unify: (259) [user] subst_vars(";; }", _425740, [], _426680)
   Call: (260) [system] compound(";; }")
^  Redo: (259) [user] subst_vars(";; }", _425740, [], _426680)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Exit: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Call: (259) [user] subst_vars([1563, 0], _425742, [], _410804)
^  Unify: (259) [user] subst_vars([1563, 0], [1563, 0], [], [])
   Call: (260) [system] var([1563, 0])
^  Redo: (259) [user] subst_vars([1563, 0], _425742, [], _410804)
^  Unify: (259) [user] subst_vars([1563, 0], [_441612|_441614], [], _410804)
^  Call: (260) [user] subst_vars(1563, _441612, [], _442552)
^  Unify: (260) [user] subst_vars(1563, 1563, [], [])
   Call: (261) [system] var(1563)
^  Redo: (260) [user] subst_vars(1563, _441612, [], _442552)
^  Unify: (260) [user] subst_vars(1563, _441612, [], _442552)
   Call: (261) [system] atom(1563)
^  Redo: (260) [user] subst_vars(1563, _441612, [], _442552)
^  Unify: (260) [user] subst_vars(1563, _441612, [], _442552)
   Call: (261) [system] compound(1563)
^  Redo: (260) [user] subst_vars(1563, _441612, [], _442552)
^  Unify: (260) [user] subst_vars(1563, 1563, [], [])
^  Exit: (260) [user] subst_vars(1563, 1563, [], [])
^  Call: (260) [user] subst_vars([0], _441614, [], _410804)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _441614, [], _410804)
^  Unify: (260) [user] subst_vars([0], [_457484|_457486], [], _410804)
^  Call: (261) [user] subst_vars(0, _457484, [], _458424)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _457484, [], _458424)
^  Unify: (261) [user] subst_vars(0, _457484, [], _458424)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _457484, [], _458424)
^  Unify: (261) [user] subst_vars(0, _457484, [], _458424)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _457484, [], _458424)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _457486, [], _410804)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _457486, [], _410804)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1563, 0], [1563, 0], [], [])
^  Exit: (258) [user] subst_vars([";; }", 1563, 0], [";; }", 1563, 0], [], [])
   Call: (258) [system] compound_name_arguments(_410802, '$COMMENT', [";; }", 1563, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1563, 0), '$COMMENT', [";; }", 1563, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; }", 1563, 0), '$COMMENT'(";; }", 1563, 0), [], [])
   Call: (257) [system] _480842=metta_file_buffer(+, '$COMMENT'(";; }", 1563, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; }", 1563, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; }", 1563, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1563, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1563, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1563, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1563, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1563, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1563, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1565, 0, 56323, '$COMMENT'(";; Converted:", 1565, 0), '$stream_position'(56323, 1565, 0, 56357)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1565, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1565, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1565, 0), _15798))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1565, 0), _15798))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1565, 0), _15798)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1565, 0), _15798)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1565, 0), _15798)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1565, 0), _15798)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1565, 0), _21410))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1565, 0), _21410))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1565, 0), _21410))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1565, 0), _21410))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1565, 0), _21410)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1565, 0), _21410)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1565, 0), _26996))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1565, 0), _26996))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1565, 0), _26996)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1565, 0), _26996)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1565, 0), _26996)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1565, 0), _26996)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1565, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1565, 0), _26996)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1565, 0), '$VAR'(_34456))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1565, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1565, 0), _26996)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1565, 0), _26996)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1565, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1565, 0), _26996)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1565, 0), _26996)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1565, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1565, 0), _26996)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1565, 0), _26996)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1565, 0)==[_43736, _43742]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1565, 0), _26996)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1565, 0), _26996)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1565, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1565, 0), _26996)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1565, 0), _26996)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1565, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1565, 0), _26996)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1565, 0), _26996)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1565, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1565, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1565, 0), _53938, _53940)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1565, 0), '$COMMENT', [";; Converted:", 1565, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1565, 0], _57680)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1565, 0], _57680)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1565, 0], _57680, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1565, 0], [_60498|_60500], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _60498)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _60498)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _60498)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_65144))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _60498)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _60498)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _60498)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _60498)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _60498)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _60498)
   Call: (273) [system] ";; Converted:"==[_74424, _74430]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _60498)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _60498)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _60498)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _60498)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _60498)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _60498)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _60498)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _60498)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _60498)
   Call: (273) [system] ";; Converted:"=_60498
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1565, 0], _60500, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1565, 0], [_98496|_98498], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1565, _98496)
^  Unify: (273) [user] mfix_vars1(1565, _98496)
   Call: (274) [system] var(1565)
^  Redo: (273) [user] mfix_vars1(1565, _98496)
^  Unify: (273) [user] mfix_vars1(1565, '$VAR'(_103142))
   Call: (274) [system] atom(1565)
^  Redo: (273) [user] mfix_vars1(1565, _98496)
^  Unify: (273) [user] mfix_vars1(1565, _98496)
   Call: (274) [system] 1565==true
^  Redo: (273) [user] mfix_vars1(1565, _98496)
^  Unify: (273) [user] mfix_vars1(1565, _98496)
   Call: (274) [system] 1565==false
^  Redo: (273) [user] mfix_vars1(1565, _98496)
^  Unify: (273) [user] mfix_vars1(1565, _98496)
   Call: (274) [system] 1565==[_112422, _112428]
^  Redo: (273) [user] mfix_vars1(1565, _98496)
^  Unify: (273) [user] mfix_vars1(1565, _98496)
   Call: (274) [system] is_list(1565)
^  Redo: (273) [user] mfix_vars1(1565, _98496)
^  Unify: (273) [user] mfix_vars1(1565, _98496)
   Call: (274) [system] string(1565)
^  Redo: (273) [user] mfix_vars1(1565, _98496)
^  Unify: (273) [user] mfix_vars1(1565, _98496)
   Call: (274) [system] compound(1565)
^  Redo: (273) [user] mfix_vars1(1565, _98496)
^  Unify: (273) [user] mfix_vars1(1565, _98496)
^  Call: (274) [user] symbol(1565)
^  Unify: (274) [user] symbol(1565)
   Call: (275) [system] atom(1565)
   Fail: (275) [system] atom(1565)
^  Fail: (274) [user] symbol(1565)
^  Redo: (273) [user] mfix_vars1(1565, _98496)
   Call: (274) [system] 1565=_98496
   Exit: (274) [system] 1565=1565
^  Exit: (273) [user] mfix_vars1(1565, 1565)
   Call: (273) [apply] apply:maplist_([0], _98498, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_132822|_132824], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _132822)
^  Unify: (274) [user] mfix_vars1(0, _132822)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _132822)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_137468))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _132822)
^  Unify: (274) [user] mfix_vars1(0, _132822)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _132822)
^  Unify: (274) [user] mfix_vars1(0, _132822)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _132822)
^  Unify: (274) [user] mfix_vars1(0, _132822)
   Call: (275) [system] 0==[_146748, _146754]
^  Redo: (274) [user] mfix_vars1(0, _132822)
^  Unify: (274) [user] mfix_vars1(0, _132822)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _132822)
^  Unify: (274) [user] mfix_vars1(0, _132822)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _132822)
^  Unify: (274) [user] mfix_vars1(0, _132822)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _132822)
^  Unify: (274) [user] mfix_vars1(0, _132822)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _132822)
   Call: (275) [system] 0=_132822
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _132824, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1565, 0], [1565, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1565, 0], [";; Converted:", 1565, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1565, 0], [";; Converted:", 1565, 0])
   Call: (270) [system] compound_name_arguments(_26996, '$COMMENT', [";; Converted:", 1565, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1565, 0), '$COMMENT', [";; Converted:", 1565, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1565, 0)\=@='$COMMENT'(";; Converted:", 1565, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1565, 0), _21410)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1565, 0), _182996))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1565, 0), _182996))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1565, 0), _182996))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1565, 0), _182996))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1565, 0), _182996)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1565, 0), _182996)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1565, 0), _188582))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1565, 0), _188582))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1565, 0), _188582)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1565, 0), _188582)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1565, 0), _188582)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1565, 0)\=@='$COMMENT'(";; Converted:", 1565, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1565, 0), _182996)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1565, 0), _15798))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1565, 0), _15798))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1565, 0), _15798))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1565, 0), _15798))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1565, 0), _15798)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1565, 0), _15798)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1565, 0), _210902))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1565, 0), _210902))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1565, 0), _210902)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1565, 0), _210902)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1565, 0), _210902)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1565, 0)\=@='$COMMENT'(";; Converted:", 1565, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1565, 0), _15798)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1565, 0)\=@='$COMMENT'(";; Converted:", 1565, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1565, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1565, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1565, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1565, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1565, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1565, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1565, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1565, 0), _239680, [], _239682)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1565, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1565, 0), _239680, [], _239682)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1565, 0), _239680, [], _239682)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1565, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1565, 0), _239680, [], _239682)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1565, 0), _239680, [], _239682)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1565, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1565, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1565, 0), _248996, _248998)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1565, 0), '$COMMENT', [";; Converted:", 1565, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1565, 0], _250882, [], _239682)
^  Unify: (258) [user] subst_vars([";; Converted:", 1565, 0], [";; Converted:", 1565, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1565, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1565, 0], _250882, [], _239682)
^  Unify: (258) [user] subst_vars([";; Converted:", 1565, 0], [_254618|_254620], [], _239682)
^  Call: (259) [user] subst_vars(";; Converted:", _254618, [], _255558)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _254618, [], _255558)
^  Unify: (259) [user] subst_vars(";; Converted:", _254618, [], _255558)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _254618, [], _255558)
^  Unify: (259) [user] subst_vars(";; Converted:", _254618, [], _255558)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _254618, [], _255558)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1565, 0], _254620, [], _239682)
^  Unify: (259) [user] subst_vars([1565, 0], [1565, 0], [], [])
   Call: (260) [system] var([1565, 0])
^  Redo: (259) [user] subst_vars([1565, 0], _254620, [], _239682)
^  Unify: (259) [user] subst_vars([1565, 0], [_270490|_270492], [], _239682)
^  Call: (260) [user] subst_vars(1565, _270490, [], _271430)
^  Unify: (260) [user] subst_vars(1565, 1565, [], [])
   Call: (261) [system] var(1565)
^  Redo: (260) [user] subst_vars(1565, _270490, [], _271430)
^  Unify: (260) [user] subst_vars(1565, _270490, [], _271430)
   Call: (261) [system] atom(1565)
^  Redo: (260) [user] subst_vars(1565, _270490, [], _271430)
^  Unify: (260) [user] subst_vars(1565, _270490, [], _271430)
   Call: (261) [system] compound(1565)
^  Redo: (260) [user] subst_vars(1565, _270490, [], _271430)
^  Unify: (260) [user] subst_vars(1565, 1565, [], [])
^  Exit: (260) [user] subst_vars(1565, 1565, [], [])
^  Call: (260) [user] subst_vars([0], _270492, [], _239682)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _270492, [], _239682)
^  Unify: (260) [user] subst_vars([0], [_286362|_286364], [], _239682)
^  Call: (261) [user] subst_vars(0, _286362, [], _287302)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _286362, [], _287302)
^  Unify: (261) [user] subst_vars(0, _286362, [], _287302)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _286362, [], _287302)
^  Unify: (261) [user] subst_vars(0, _286362, [], _287302)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _286362, [], _287302)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _286364, [], _239682)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _286364, [], _239682)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1565, 0], [1565, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1565, 0], [";; Converted:", 1565, 0], [], [])
   Call: (258) [system] compound_name_arguments(_239680, '$COMMENT', [";; Converted:", 1565, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1565, 0), '$COMMENT', [";; Converted:", 1565, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1565, 0), '$COMMENT'(";; Converted:", 1565, 0), [], [])
   Call: (257) [system] _309720=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1565, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1565, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1565, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1565, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1565, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1565, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1565, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1565, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1565, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1586, 0, 57007, '$COMMENT'(";; Original:", 1586, 0), '$stream_position'(57007, 1586, 0, 57041)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1586, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1586, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1586, 0), _362438))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1586, 0), _362438))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1586, 0), _362438)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1586, 0), _362438)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1586, 0), _362438)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1586, 0), _362438)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1586, 0), _368050))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1586, 0), _368050))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1586, 0), _368050))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1586, 0), _368050))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1586, 0), _368050)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1586, 0), _368050)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1586, 0), _373636))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1586, 0), _373636))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1586, 0), _373636)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1586, 0), _373636)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1586, 0), _373636)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1586, 0), _373636)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1586, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1586, 0), _373636)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1586, 0), '$VAR'(_381096))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1586, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1586, 0), _373636)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1586, 0), _373636)
   Call: (270) [system] '$COMMENT'(";; Original:", 1586, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1586, 0), _373636)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1586, 0), _373636)
   Call: (270) [system] '$COMMENT'(";; Original:", 1586, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1586, 0), _373636)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1586, 0), _373636)
   Call: (270) [system] '$COMMENT'(";; Original:", 1586, 0)==[_390376, _390382]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1586, 0), _373636)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1586, 0), _373636)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1586, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1586, 0), _373636)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1586, 0), _373636)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1586, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1586, 0), _373636)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1586, 0), _373636)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1586, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1586, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1586, 0), _400578, _400580)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1586, 0), '$COMMENT', [";; Original:", 1586, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1586, 0], _404320)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1586, 0], _404320)
   Call: (271) [apply] apply:maplist_([";; Original:", 1586, 0], _404320, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1586, 0], [_407138|_407140], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _407138)
^  Unify: (272) [user] mfix_vars1(";; Original:", _407138)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _407138)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_411784))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _407138)
^  Unify: (272) [user] mfix_vars1(";; Original:", _407138)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _407138)
^  Unify: (272) [user] mfix_vars1(";; Original:", _407138)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _407138)
^  Unify: (272) [user] mfix_vars1(";; Original:", _407138)
   Call: (273) [system] ";; Original:"==[_421064, _421070]
^  Redo: (272) [user] mfix_vars1(";; Original:", _407138)
^  Unify: (272) [user] mfix_vars1(";; Original:", _407138)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _407138)
^  Unify: (272) [user] mfix_vars1(";; Original:", _407138)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _407138)
^  Unify: (272) [user] mfix_vars1(";; Original:", _407138)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _407138)
^  Unify: (272) [user] mfix_vars1(";; Original:", _407138)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _407138)
   Call: (273) [system] ";; Original:"=_407138
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1586, 0], _407140, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1586, 0], [_445136|_445138], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1586, _445136)
^  Unify: (273) [user] mfix_vars1(1586, _445136)
   Call: (274) [system] var(1586)
^  Redo: (273) [user] mfix_vars1(1586, _445136)
^  Unify: (273) [user] mfix_vars1(1586, '$VAR'(_449782))
   Call: (274) [system] atom(1586)
^  Redo: (273) [user] mfix_vars1(1586, _445136)
^  Unify: (273) [user] mfix_vars1(1586, _445136)
   Call: (274) [system] 1586==true
^  Redo: (273) [user] mfix_vars1(1586, _445136)
^  Unify: (273) [user] mfix_vars1(1586, _445136)
   Call: (274) [system] 1586==false
^  Redo: (273) [user] mfix_vars1(1586, _445136)
^  Unify: (273) [user] mfix_vars1(1586, _445136)
   Call: (274) [system] 1586==[_459062, _459068]
^  Redo: (273) [user] mfix_vars1(1586, _445136)
^  Unify: (273) [user] mfix_vars1(1586, _445136)
   Call: (274) [system] is_list(1586)
^  Redo: (273) [user] mfix_vars1(1586, _445136)
^  Unify: (273) [user] mfix_vars1(1586, _445136)
   Call: (274) [system] string(1586)
^  Redo: (273) [user] mfix_vars1(1586, _445136)
^  Unify: (273) [user] mfix_vars1(1586, _445136)
   Call: (274) [system] compound(1586)
^  Redo: (273) [user] mfix_vars1(1586, _445136)
^  Unify: (273) [user] mfix_vars1(1586, _445136)
^  Call: (274) [user] symbol(1586)
^  Unify: (274) [user] symbol(1586)
   Call: (275) [system] atom(1586)
   Fail: (275) [system] atom(1586)
^  Fail: (274) [user] symbol(1586)
^  Redo: (273) [user] mfix_vars1(1586, _445136)
   Call: (274) [system] 1586=_445136
   Exit: (274) [system] 1586=1586
^  Exit: (273) [user] mfix_vars1(1586, 1586)
   Call: (273) [apply] apply:maplist_([0], _445138, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_479462|_479464], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _479462)
^  Unify: (274) [user] mfix_vars1(0, _479462)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _479462)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_484108))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _479462)
^  Unify: (274) [user] mfix_vars1(0, _479462)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _479462)
^  Unify: (274) [user] mfix_vars1(0, _479462)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _479462)
^  Unify: (274) [user] mfix_vars1(0, _479462)
   Call: (275) [system] 0==[_493388, _493394]
^  Redo: (274) [user] mfix_vars1(0, _479462)
^  Unify: (274) [user] mfix_vars1(0, _479462)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _479462)
^  Unify: (274) [user] mfix_vars1(0, _479462)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _479462)
^  Unify: (274) [user] mfix_vars1(0, _479462)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _479462)
^  Unify: (274) [user] mfix_vars1(0, _479462)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _479462)
   Call: (275) [system] 0=_479462
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _479464, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1586, 0], [1586, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1586, 0], [";; Original:", 1586, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1586, 0], [";; Original:", 1586, 0])
   Call: (270) [system] compound_name_arguments(_373636, '$COMMENT', [";; Original:", 1586, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1586, 0), '$COMMENT', [";; Original:", 1586, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1586, 0)\=@='$COMMENT'(";; Original:", 1586, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1586, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1586, 0), _11524))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1586, 0), _11524))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1586, 0), _11524))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1586, 0), _11524))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1586, 0), _11524)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1586, 0), _11524)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1586, 0), _17110))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1586, 0), _17110))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1586, 0), _17110)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1586, 0), _17110)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1586, 0), _17110)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1586, 0)\=@='$COMMENT'(";; Original:", 1586, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1586, 0), _11524)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1586, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1586, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1586, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1586, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1586, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1586, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1586, 0), _39430))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1586, 0), _39430))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1586, 0), _39430)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1586, 0), _39430)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1586, 0), _39430)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1586, 0)\=@='$COMMENT'(";; Original:", 1586, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1586, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1586, 0)\=@='$COMMENT'(";; Original:", 1586, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1586, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1586, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1586, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1586, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1586, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1586, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1586, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1586, 0), _68208, [], _68210)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1586, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1586, 0), _68208, [], _68210)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1586, 0), _68208, [], _68210)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1586, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1586, 0), _68208, [], _68210)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1586, 0), _68208, [], _68210)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1586, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1586, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1586, 0), _77524, _77526)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1586, 0), '$COMMENT', [";; Original:", 1586, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1586, 0], _79410, [], _68210)
^  Unify: (258) [user] subst_vars([";; Original:", 1586, 0], [";; Original:", 1586, 0], [], [])
   Call: (259) [system] var([";; Original:", 1586, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1586, 0], _79410, [], _68210)
^  Unify: (258) [user] subst_vars([";; Original:", 1586, 0], [_83146|_83148], [], _68210)
^  Call: (259) [user] subst_vars(";; Original:", _83146, [], _84086)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _83146, [], _84086)
^  Unify: (259) [user] subst_vars(";; Original:", _83146, [], _84086)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _83146, [], _84086)
^  Unify: (259) [user] subst_vars(";; Original:", _83146, [], _84086)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _83146, [], _84086)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1586, 0], _83148, [], _68210)
^  Unify: (259) [user] subst_vars([1586, 0], [1586, 0], [], [])
   Call: (260) [system] var([1586, 0])
^  Redo: (259) [user] subst_vars([1586, 0], _83148, [], _68210)
^  Unify: (259) [user] subst_vars([1586, 0], [_99018|_99020], [], _68210)
^  Call: (260) [user] subst_vars(1586, _99018, [], _99958)
^  Unify: (260) [user] subst_vars(1586, 1586, [], [])
   Call: (261) [system] var(1586)
^  Redo: (260) [user] subst_vars(1586, _99018, [], _99958)
^  Unify: (260) [user] subst_vars(1586, _99018, [], _99958)
   Call: (261) [system] atom(1586)
^  Redo: (260) [user] subst_vars(1586, _99018, [], _99958)
^  Unify: (260) [user] subst_vars(1586, _99018, [], _99958)
   Call: (261) [system] compound(1586)
^  Redo: (260) [user] subst_vars(1586, _99018, [], _99958)
^  Unify: (260) [user] subst_vars(1586, 1586, [], [])
^  Exit: (260) [user] subst_vars(1586, 1586, [], [])
^  Call: (260) [user] subst_vars([0], _99020, [], _68210)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _99020, [], _68210)
^  Unify: (260) [user] subst_vars([0], [_114890|_114892], [], _68210)
^  Call: (261) [user] subst_vars(0, _114890, [], _115830)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _114890, [], _115830)
^  Unify: (261) [user] subst_vars(0, _114890, [], _115830)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _114890, [], _115830)
^  Unify: (261) [user] subst_vars(0, _114890, [], _115830)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _114890, [], _115830)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _114892, [], _68210)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _114892, [], _68210)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1586, 0], [1586, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1586, 0], [";; Original:", 1586, 0], [], [])
   Call: (258) [system] compound_name_arguments(_68208, '$COMMENT', [";; Original:", 1586, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1586, 0), '$COMMENT', [";; Original:", 1586, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1586, 0), '$COMMENT'(";; Original:", 1586, 0), [], [])
   Call: (257) [system] _138248=metta_file_buffer(+, '$COMMENT'(";; Original:", 1586, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1586, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1586, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1586, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1586, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1586, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1586, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1586, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1586, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1587, 0, 57020, '$COMMENT'(";; #[test]", 1587, 0), '$stream_position'(57020, 1587, 0, 57054)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1587, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1587, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; #[test]", 1587, 0), _190966))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 1587, 0), _190966))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; #[test]", 1587, 0), _190966)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 1587, 0), _190966)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1587, 0), _190966)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1587, 0), _190966)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; #[test]", 1587, 0), _196578))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1587, 0), _196578))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1587, 0), _196578))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1587, 0), _196578))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1587, 0), _196578)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1587, 0), _196578)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; #[test]", 1587, 0), _202164))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 1587, 0), _202164))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; #[test]", 1587, 0), _202164)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 1587, 0), _202164)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1587, 0), _202164)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1587, 0), _202164)
   Call: (270) [system] var('$COMMENT'(";; #[test]", 1587, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1587, 0), _202164)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1587, 0), '$VAR'(_209624))
   Call: (270) [system] atom('$COMMENT'(";; #[test]", 1587, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1587, 0), _202164)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1587, 0), _202164)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1587, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1587, 0), _202164)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1587, 0), _202164)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1587, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1587, 0), _202164)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1587, 0), _202164)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1587, 0)==[_218904, _218910]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1587, 0), _202164)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1587, 0), _202164)
   Call: (270) [system] is_list('$COMMENT'(";; #[test]", 1587, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1587, 0), _202164)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1587, 0), _202164)
   Call: (270) [system] string('$COMMENT'(";; #[test]", 1587, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1587, 0), _202164)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1587, 0), _202164)
   Call: (270) [system] compound('$COMMENT'(";; #[test]", 1587, 0))
   Exit: (270) [system] compound('$COMMENT'(";; #[test]", 1587, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1587, 0), _229106, _229108)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1587, 0), '$COMMENT', [";; #[test]", 1587, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; #[test]", 1587, 0], _232848)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 1587, 0], _232848)
   Call: (271) [apply] apply:maplist_([";; #[test]", 1587, 0], _232848, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; #[test]", 1587, 0], [_235666|_235668], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; #[test]", _235666)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _235666)
   Call: (273) [system] var(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _235666)
^  Unify: (272) [user] mfix_vars1(";; #[test]", '$VAR'(_240312))
   Call: (273) [system] atom(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _235666)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _235666)
   Call: (273) [system] ";; #[test]"==true
^  Redo: (272) [user] mfix_vars1(";; #[test]", _235666)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _235666)
   Call: (273) [system] ";; #[test]"==false
^  Redo: (272) [user] mfix_vars1(";; #[test]", _235666)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _235666)
   Call: (273) [system] ";; #[test]"==[_249592, _249598]
^  Redo: (272) [user] mfix_vars1(";; #[test]", _235666)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _235666)
   Call: (273) [system] is_list(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _235666)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _235666)
   Call: (273) [system] string(";; #[test]")
   Exit: (273) [system] string(";; #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; #[test]", _235666)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _235666)
   Call: (273) [system] compound(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _235666)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _235666)
^  Call: (273) [user] symbol(";; #[test]")
^  Unify: (273) [user] symbol(";; #[test]")
   Call: (274) [system] atom(";; #[test]")
   Fail: (274) [system] atom(";; #[test]")
^  Fail: (273) [user] symbol(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _235666)
   Call: (273) [system] ";; #[test]"=_235666
   Exit: (273) [system] ";; #[test]"=";; #[test]"
^  Exit: (272) [user] mfix_vars1(";; #[test]", ";; #[test]")
   Call: (272) [apply] apply:maplist_([1587, 0], _235668, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1587, 0], [_273664|_273666], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1587, _273664)
^  Unify: (273) [user] mfix_vars1(1587, _273664)
   Call: (274) [system] var(1587)
^  Redo: (273) [user] mfix_vars1(1587, _273664)
^  Unify: (273) [user] mfix_vars1(1587, '$VAR'(_278310))
   Call: (274) [system] atom(1587)
^  Redo: (273) [user] mfix_vars1(1587, _273664)
^  Unify: (273) [user] mfix_vars1(1587, _273664)
   Call: (274) [system] 1587==true
^  Redo: (273) [user] mfix_vars1(1587, _273664)
^  Unify: (273) [user] mfix_vars1(1587, _273664)
   Call: (274) [system] 1587==false
^  Redo: (273) [user] mfix_vars1(1587, _273664)
^  Unify: (273) [user] mfix_vars1(1587, _273664)
   Call: (274) [system] 1587==[_287590, _287596]
^  Redo: (273) [user] mfix_vars1(1587, _273664)
^  Unify: (273) [user] mfix_vars1(1587, _273664)
   Call: (274) [system] is_list(1587)
^  Redo: (273) [user] mfix_vars1(1587, _273664)
^  Unify: (273) [user] mfix_vars1(1587, _273664)
   Call: (274) [system] string(1587)
^  Redo: (273) [user] mfix_vars1(1587, _273664)
^  Unify: (273) [user] mfix_vars1(1587, _273664)
   Call: (274) [system] compound(1587)
^  Redo: (273) [user] mfix_vars1(1587, _273664)
^  Unify: (273) [user] mfix_vars1(1587, _273664)
^  Call: (274) [user] symbol(1587)
^  Unify: (274) [user] symbol(1587)
   Call: (275) [system] atom(1587)
   Fail: (275) [system] atom(1587)
^  Fail: (274) [user] symbol(1587)
^  Redo: (273) [user] mfix_vars1(1587, _273664)
   Call: (274) [system] 1587=_273664
   Exit: (274) [system] 1587=1587
^  Exit: (273) [user] mfix_vars1(1587, 1587)
   Call: (273) [apply] apply:maplist_([0], _273666, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_307990|_307992], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _307990)
^  Unify: (274) [user] mfix_vars1(0, _307990)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _307990)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_312636))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _307990)
^  Unify: (274) [user] mfix_vars1(0, _307990)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _307990)
^  Unify: (274) [user] mfix_vars1(0, _307990)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _307990)
^  Unify: (274) [user] mfix_vars1(0, _307990)
   Call: (275) [system] 0==[_321916, _321922]
^  Redo: (274) [user] mfix_vars1(0, _307990)
^  Unify: (274) [user] mfix_vars1(0, _307990)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _307990)
^  Unify: (274) [user] mfix_vars1(0, _307990)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _307990)
^  Unify: (274) [user] mfix_vars1(0, _307990)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _307990)
^  Unify: (274) [user] mfix_vars1(0, _307990)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _307990)
   Call: (275) [system] 0=_307990
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _307992, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1587, 0], [1587, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; #[test]", 1587, 0], [";; #[test]", 1587, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 1587, 0], [";; #[test]", 1587, 0])
   Call: (270) [system] compound_name_arguments(_202164, '$COMMENT', [";; #[test]", 1587, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1587, 0), '$COMMENT', [";; #[test]", 1587, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1587, 0)\=@='$COMMENT'(";; #[test]", 1587, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1587, 0), _196578)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; #[test]", 1587, 0), _358164))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1587, 0), _358164))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1587, 0), _358164))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1587, 0), _358164))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1587, 0), _358164)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1587, 0), _358164)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; #[test]", 1587, 0), _363750))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 1587, 0), _363750))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; #[test]", 1587, 0), _363750)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 1587, 0), _363750)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1587, 0), _363750)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1587, 0)\=@='$COMMENT'(";; #[test]", 1587, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1587, 0), _358164)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; #[test]", 1587, 0), _190966))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1587, 0), _190966))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1587, 0), _190966))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1587, 0), _190966))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1587, 0), _190966)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1587, 0), _190966)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; #[test]", 1587, 0), _386070))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 1587, 0), _386070))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; #[test]", 1587, 0), _386070)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 1587, 0), _386070)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1587, 0), _386070)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1587, 0)\=@='$COMMENT'(";; #[test]", 1587, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1587, 0), _190966)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0)))
   Call: (261) [system] '$COMMENT'(";; #[test]", 1587, 0)\=@='$COMMENT'(";; #[test]", 1587, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1587, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1587, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1587, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1587, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1587, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1587, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1587, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1587, 0), _414848, [], _414850)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; #[test]", 1587, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1587, 0), _414848, [], _414850)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1587, 0), _414848, [], _414850)
   Call: (258) [system] atom('$COMMENT'(";; #[test]", 1587, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1587, 0), _414848, [], _414850)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1587, 0), _414848, [], _414850)
   Call: (258) [system] compound('$COMMENT'(";; #[test]", 1587, 0))
   Exit: (258) [system] compound('$COMMENT'(";; #[test]", 1587, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1587, 0), _424164, _424166)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1587, 0), '$COMMENT', [";; #[test]", 1587, 0])
^  Call: (258) [user] subst_vars([";; #[test]", 1587, 0], _426050, [], _414850)
^  Unify: (258) [user] subst_vars([";; #[test]", 1587, 0], [";; #[test]", 1587, 0], [], [])
   Call: (259) [system] var([";; #[test]", 1587, 0])
^  Redo: (258) [user] subst_vars([";; #[test]", 1587, 0], _426050, [], _414850)
^  Unify: (258) [user] subst_vars([";; #[test]", 1587, 0], [_429786|_429788], [], _414850)
^  Call: (259) [user] subst_vars(";; #[test]", _429786, [], _430726)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
   Call: (260) [system] var(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _429786, [], _430726)
^  Unify: (259) [user] subst_vars(";; #[test]", _429786, [], _430726)
   Call: (260) [system] atom(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _429786, [], _430726)
^  Unify: (259) [user] subst_vars(";; #[test]", _429786, [], _430726)
   Call: (260) [system] compound(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _429786, [], _430726)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Exit: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Call: (259) [user] subst_vars([1587, 0], _429788, [], _414850)
^  Unify: (259) [user] subst_vars([1587, 0], [1587, 0], [], [])
   Call: (260) [system] var([1587, 0])
^  Redo: (259) [user] subst_vars([1587, 0], _429788, [], _414850)
^  Unify: (259) [user] subst_vars([1587, 0], [_445658|_445660], [], _414850)
^  Call: (260) [user] subst_vars(1587, _445658, [], _446598)
^  Unify: (260) [user] subst_vars(1587, 1587, [], [])
   Call: (261) [system] var(1587)
^  Redo: (260) [user] subst_vars(1587, _445658, [], _446598)
^  Unify: (260) [user] subst_vars(1587, _445658, [], _446598)
   Call: (261) [system] atom(1587)
^  Redo: (260) [user] subst_vars(1587, _445658, [], _446598)
^  Unify: (260) [user] subst_vars(1587, _445658, [], _446598)
   Call: (261) [system] compound(1587)
^  Redo: (260) [user] subst_vars(1587, _445658, [], _446598)
^  Unify: (260) [user] subst_vars(1587, 1587, [], [])
^  Exit: (260) [user] subst_vars(1587, 1587, [], [])
^  Call: (260) [user] subst_vars([0], _445660, [], _414850)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _445660, [], _414850)
^  Unify: (260) [user] subst_vars([0], [_461530|_461532], [], _414850)
^  Call: (261) [user] subst_vars(0, _461530, [], _462470)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _461530, [], _462470)
^  Unify: (261) [user] subst_vars(0, _461530, [], _462470)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _461530, [], _462470)
^  Unify: (261) [user] subst_vars(0, _461530, [], _462470)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _461530, [], _462470)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _461532, [], _414850)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _461532, [], _414850)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1587, 0], [1587, 0], [], [])
^  Exit: (258) [user] subst_vars([";; #[test]", 1587, 0], [";; #[test]", 1587, 0], [], [])
   Call: (258) [system] compound_name_arguments(_414848, '$COMMENT', [";; #[test]", 1587, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1587, 0), '$COMMENT', [";; #[test]", 1587, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1587, 0), '$COMMENT'(";; #[test]", 1587, 0), [], [])
   Call: (257) [system] _484888=metta_file_buffer(+, '$COMMENT'(";; #[test]", 1587, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; #[test]", 1587, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; #[test]", 1587, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 1587, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 1587, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1587, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1587, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1587, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1587, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1588, 0, 57031, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$stream_position'(57031, 1588, 0, 57065)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _20348))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _20348))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _20348)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _20348)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _20348)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _20348)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _25960))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _25960))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _25960))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _25960))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _25960)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _25960)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _31546))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _31546))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _31546)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _31546)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _31546)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _31546)
   Call: (270) [system] var('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _31546)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$VAR'(_39006))
   Call: (270) [system] atom('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _31546)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _31546)
   Call: (270) [system] '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _31546)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _31546)
   Call: (270) [system] '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _31546)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _31546)
   Call: (270) [system] '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0)==[_48286, _48292]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _31546)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _31546)
   Call: (270) [system] is_list('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _31546)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _31546)
   Call: (270) [system] string('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _31546)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _31546)
   Call: (270) [system] compound('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
   Exit: (270) [system] compound('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _58488, _58490)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT', [";; fn test_get_doc_atom() {", 1588, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; fn test_get_doc_atom() {", 1588, 0], _62230)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn test_get_doc_atom() {", 1588, 0], _62230)
   Call: (271) [apply] apply:maplist_([";; fn test_get_doc_atom() {", 1588, 0], _62230, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; fn test_get_doc_atom() {", 1588, 0], [_65048|_65050], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; fn test_get_doc_atom() {", _65048)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_atom() {", _65048)
   Call: (273) [system] var(";; fn test_get_doc_atom() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_atom() {", _65048)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_atom() {", '$VAR'(_69694))
   Call: (273) [system] atom(";; fn test_get_doc_atom() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_atom() {", _65048)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_atom() {", _65048)
   Call: (273) [system] ";; fn test_get_doc_atom() {"==true
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_atom() {", _65048)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_atom() {", _65048)
   Call: (273) [system] ";; fn test_get_doc_atom() {"==false
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_atom() {", _65048)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_atom() {", _65048)
   Call: (273) [system] ";; fn test_get_doc_atom() {"==[_78974, _78980]
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_atom() {", _65048)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_atom() {", _65048)
   Call: (273) [system] is_list(";; fn test_get_doc_atom() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_atom() {", _65048)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_atom() {", _65048)
   Call: (273) [system] string(";; fn test_get_doc_atom() {")
   Exit: (273) [system] string(";; fn test_get_doc_atom() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_atom() {", _65048)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_atom() {", _65048)
   Call: (273) [system] compound(";; fn test_get_doc_atom() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_atom() {", _65048)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_atom() {", _65048)
^  Call: (273) [user] symbol(";; fn test_get_doc_atom() {")
^  Unify: (273) [user] symbol(";; fn test_get_doc_atom() {")
   Call: (274) [system] atom(";; fn test_get_doc_atom() {")
   Fail: (274) [system] atom(";; fn test_get_doc_atom() {")
^  Fail: (273) [user] symbol(";; fn test_get_doc_atom() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_atom() {", _65048)
   Call: (273) [system] ";; fn test_get_doc_atom() {"=_65048
   Exit: (273) [system] ";; fn test_get_doc_atom() {"=";; fn test_get_doc_atom() {"
^  Exit: (272) [user] mfix_vars1(";; fn test_get_doc_atom() {", ";; fn test_get_doc_atom() {")
   Call: (272) [apply] apply:maplist_([1588, 0], _65050, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1588, 0], [_103046|_103048], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1588, _103046)
^  Unify: (273) [user] mfix_vars1(1588, _103046)
   Call: (274) [system] var(1588)
^  Redo: (273) [user] mfix_vars1(1588, _103046)
^  Unify: (273) [user] mfix_vars1(1588, '$VAR'(_107692))
   Call: (274) [system] atom(1588)
^  Redo: (273) [user] mfix_vars1(1588, _103046)
^  Unify: (273) [user] mfix_vars1(1588, _103046)
   Call: (274) [system] 1588==true
^  Redo: (273) [user] mfix_vars1(1588, _103046)
^  Unify: (273) [user] mfix_vars1(1588, _103046)
   Call: (274) [system] 1588==false
^  Redo: (273) [user] mfix_vars1(1588, _103046)
^  Unify: (273) [user] mfix_vars1(1588, _103046)
   Call: (274) [system] 1588==[_116972, _116978]
^  Redo: (273) [user] mfix_vars1(1588, _103046)
^  Unify: (273) [user] mfix_vars1(1588, _103046)
   Call: (274) [system] is_list(1588)
^  Redo: (273) [user] mfix_vars1(1588, _103046)
^  Unify: (273) [user] mfix_vars1(1588, _103046)
   Call: (274) [system] string(1588)
^  Redo: (273) [user] mfix_vars1(1588, _103046)
^  Unify: (273) [user] mfix_vars1(1588, _103046)
   Call: (274) [system] compound(1588)
^  Redo: (273) [user] mfix_vars1(1588, _103046)
^  Unify: (273) [user] mfix_vars1(1588, _103046)
^  Call: (274) [user] symbol(1588)
^  Unify: (274) [user] symbol(1588)
   Call: (275) [system] atom(1588)
   Fail: (275) [system] atom(1588)
^  Fail: (274) [user] symbol(1588)
^  Redo: (273) [user] mfix_vars1(1588, _103046)
   Call: (274) [system] 1588=_103046
   Exit: (274) [system] 1588=1588
^  Exit: (273) [user] mfix_vars1(1588, 1588)
   Call: (273) [apply] apply:maplist_([0], _103048, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_137372|_137374], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _137372)
^  Unify: (274) [user] mfix_vars1(0, _137372)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _137372)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_142018))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _137372)
^  Unify: (274) [user] mfix_vars1(0, _137372)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _137372)
^  Unify: (274) [user] mfix_vars1(0, _137372)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _137372)
^  Unify: (274) [user] mfix_vars1(0, _137372)
   Call: (275) [system] 0==[_151298, _151304]
^  Redo: (274) [user] mfix_vars1(0, _137372)
^  Unify: (274) [user] mfix_vars1(0, _137372)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _137372)
^  Unify: (274) [user] mfix_vars1(0, _137372)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _137372)
^  Unify: (274) [user] mfix_vars1(0, _137372)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _137372)
^  Unify: (274) [user] mfix_vars1(0, _137372)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _137372)
   Call: (275) [system] 0=_137372
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _137374, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1588, 0], [1588, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; fn test_get_doc_atom() {", 1588, 0], [";; fn test_get_doc_atom() {", 1588, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn test_get_doc_atom() {", 1588, 0], [";; fn test_get_doc_atom() {", 1588, 0])
   Call: (270) [system] compound_name_arguments(_31546, '$COMMENT', [";; fn test_get_doc_atom() {", 1588, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT', [";; fn test_get_doc_atom() {", 1588, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0)\=@='$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _25960)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _187546))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _187546))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _187546))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _187546))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _187546)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _187546)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _193132))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _193132))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _193132)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _193132)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _193132)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0)\=@='$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _187546)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _20348))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _20348))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _20348))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _20348))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _20348)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _20348)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _215452))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _215452))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _215452)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _215452)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _215452)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0)\=@='$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _20348)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0)))
   Call: (261) [system] '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0)\=@='$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _244230, [], _244232)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _244230, [], _244232)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _244230, [], _244232)
   Call: (258) [system] atom('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _244230, [], _244232)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _244230, [], _244232)
   Call: (258) [system] compound('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
   Exit: (258) [system] compound('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), _253546, _253548)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT', [";; fn test_get_doc_atom() {", 1588, 0])
^  Call: (258) [user] subst_vars([";; fn test_get_doc_atom() {", 1588, 0], _255432, [], _244232)
^  Unify: (258) [user] subst_vars([";; fn test_get_doc_atom() {", 1588, 0], [";; fn test_get_doc_atom() {", 1588, 0], [], [])
   Call: (259) [system] var([";; fn test_get_doc_atom() {", 1588, 0])
^  Redo: (258) [user] subst_vars([";; fn test_get_doc_atom() {", 1588, 0], _255432, [], _244232)
^  Unify: (258) [user] subst_vars([";; fn test_get_doc_atom() {", 1588, 0], [_259168|_259170], [], _244232)
^  Call: (259) [user] subst_vars(";; fn test_get_doc_atom() {", _259168, [], _260108)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_atom() {", ";; fn test_get_doc_atom() {", [], [])
   Call: (260) [system] var(";; fn test_get_doc_atom() {")
^  Redo: (259) [user] subst_vars(";; fn test_get_doc_atom() {", _259168, [], _260108)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_atom() {", _259168, [], _260108)
   Call: (260) [system] atom(";; fn test_get_doc_atom() {")
^  Redo: (259) [user] subst_vars(";; fn test_get_doc_atom() {", _259168, [], _260108)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_atom() {", _259168, [], _260108)
   Call: (260) [system] compound(";; fn test_get_doc_atom() {")
^  Redo: (259) [user] subst_vars(";; fn test_get_doc_atom() {", _259168, [], _260108)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_atom() {", ";; fn test_get_doc_atom() {", [], [])
^  Exit: (259) [user] subst_vars(";; fn test_get_doc_atom() {", ";; fn test_get_doc_atom() {", [], [])
^  Call: (259) [user] subst_vars([1588, 0], _259170, [], _244232)
^  Unify: (259) [user] subst_vars([1588, 0], [1588, 0], [], [])
   Call: (260) [system] var([1588, 0])
^  Redo: (259) [user] subst_vars([1588, 0], _259170, [], _244232)
^  Unify: (259) [user] subst_vars([1588, 0], [_275040|_275042], [], _244232)
^  Call: (260) [user] subst_vars(1588, _275040, [], _275980)
^  Unify: (260) [user] subst_vars(1588, 1588, [], [])
   Call: (261) [system] var(1588)
^  Redo: (260) [user] subst_vars(1588, _275040, [], _275980)
^  Unify: (260) [user] subst_vars(1588, _275040, [], _275980)
   Call: (261) [system] atom(1588)
^  Redo: (260) [user] subst_vars(1588, _275040, [], _275980)
^  Unify: (260) [user] subst_vars(1588, _275040, [], _275980)
   Call: (261) [system] compound(1588)
^  Redo: (260) [user] subst_vars(1588, _275040, [], _275980)
^  Unify: (260) [user] subst_vars(1588, 1588, [], [])
^  Exit: (260) [user] subst_vars(1588, 1588, [], [])
^  Call: (260) [user] subst_vars([0], _275042, [], _244232)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _275042, [], _244232)
^  Unify: (260) [user] subst_vars([0], [_290912|_290914], [], _244232)
^  Call: (261) [user] subst_vars(0, _290912, [], _291852)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _290912, [], _291852)
^  Unify: (261) [user] subst_vars(0, _290912, [], _291852)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _290912, [], _291852)
^  Unify: (261) [user] subst_vars(0, _290912, [], _291852)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _290912, [], _291852)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _290914, [], _244232)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _290914, [], _244232)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1588, 0], [1588, 0], [], [])
^  Exit: (258) [user] subst_vars([";; fn test_get_doc_atom() {", 1588, 0], [";; fn test_get_doc_atom() {", 1588, 0], [], [])
   Call: (258) [system] compound_name_arguments(_244230, '$COMMENT', [";; fn test_get_doc_atom() {", 1588, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT', [";; fn test_get_doc_atom() {", 1588, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), [], [])
   Call: (257) [system] _314270=metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_atom() {", 1588, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1589, 0, 57059, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$stream_position'(57059, 1589, 0, 57093)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _367000))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _367000))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _367000)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _367000)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _367000)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _367000)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _372612))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _372612))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _372612))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _372612))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _372612)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _372612)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _378198))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _378198))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _378198)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _378198)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _378198)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _378198)
   Call: (270) [system] var('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _378198)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$VAR'(_385658))
   Call: (270) [system] atom('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _378198)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _378198)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _378198)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _378198)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _378198)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _378198)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0)==[_394938, _394944]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _378198)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _378198)
   Call: (270) [system] is_list('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _378198)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _378198)
   Call: (270) [system] string('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _378198)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _378198)
   Call: (270) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _405140, _405142)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0], _408882)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0], _408882)
   Call: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0], _408882, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0], [_411700|_411702], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _411700)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _411700)
   Call: (273) [system] var(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _411700)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", '$VAR'(_416346))
   Call: (273) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _411700)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _411700)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==true
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _411700)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _411700)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==false
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _411700)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _411700)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==[_425626, _425632]
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _411700)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _411700)
   Call: (273) [system] is_list(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _411700)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _411700)
   Call: (273) [system] string(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Exit: (273) [system] string(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _411700)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _411700)
   Call: (273) [system] compound(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _411700)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _411700)
^  Call: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Unify: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (274) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Fail: (274) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Fail: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _411700)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"=_411700
   Exit: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"=";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"
^  Exit: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (272) [apply] apply:maplist_([1589, 0], _411702, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1589, 0], [_449698|_449700], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1589, _449698)
^  Unify: (273) [user] mfix_vars1(1589, _449698)
   Call: (274) [system] var(1589)
^  Redo: (273) [user] mfix_vars1(1589, _449698)
^  Unify: (273) [user] mfix_vars1(1589, '$VAR'(_454344))
   Call: (274) [system] atom(1589)
^  Redo: (273) [user] mfix_vars1(1589, _449698)
^  Unify: (273) [user] mfix_vars1(1589, _449698)
   Call: (274) [system] 1589==true
^  Redo: (273) [user] mfix_vars1(1589, _449698)
^  Unify: (273) [user] mfix_vars1(1589, _449698)
   Call: (274) [system] 1589==false
^  Redo: (273) [user] mfix_vars1(1589, _449698)
^  Unify: (273) [user] mfix_vars1(1589, _449698)
   Call: (274) [system] 1589==[_463624, _463630]
^  Redo: (273) [user] mfix_vars1(1589, _449698)
^  Unify: (273) [user] mfix_vars1(1589, _449698)
   Call: (274) [system] is_list(1589)
^  Redo: (273) [user] mfix_vars1(1589, _449698)
^  Unify: (273) [user] mfix_vars1(1589, _449698)
   Call: (274) [system] string(1589)
^  Redo: (273) [user] mfix_vars1(1589, _449698)
^  Unify: (273) [user] mfix_vars1(1589, _449698)
   Call: (274) [system] compound(1589)
^  Redo: (273) [user] mfix_vars1(1589, _449698)
^  Unify: (273) [user] mfix_vars1(1589, _449698)
^  Call: (274) [user] symbol(1589)
^  Unify: (274) [user] symbol(1589)
   Call: (275) [system] atom(1589)
   Fail: (275) [system] atom(1589)
^  Fail: (274) [user] symbol(1589)
^  Redo: (273) [user] mfix_vars1(1589, _449698)
   Call: (274) [system] 1589=_449698
   Exit: (274) [system] 1589=1589
^  Exit: (273) [user] mfix_vars1(1589, 1589)
   Call: (273) [apply] apply:maplist_([0], _449700, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_484024|_484026], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _484024)
^  Unify: (274) [user] mfix_vars1(0, _484024)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _484024)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_488670))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _484024)
^  Unify: (274) [user] mfix_vars1(0, _484024)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _484024)
^  Unify: (274) [user] mfix_vars1(0, _484024)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _484024)
^  Unify: (274) [user] mfix_vars1(0, _484024)
   Call: (275) [system] 0==[_497950, _497956]
^  Redo: (274) [user] mfix_vars1(0, _484024)
^  Unify: (274) [user] mfix_vars1(0, _484024)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _484024)
^  Unify: (274) [user] mfix_vars1(0, _484024)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _484024)
^  Unify: (274) [user] mfix_vars1(0, _484024)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _484024)
^  Unify: (274) [user] mfix_vars1(0, _484024)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _484024)
   Call: (275) [system] 0=_484024
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _484026, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1589, 0], [1589, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0])
   Call: (270) [system] compound_name_arguments(_5990, '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _5976)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _16238))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _16238))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _16238))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _16238))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _16238)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _16238)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _21824))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _21824))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _21824)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _21824)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _21824)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _16238)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _5956))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _5956))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _5956))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _5956))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _5956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _5956)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _44144))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _44144))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _44144)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _44144)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _44144)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _5956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0)))
   Call: (261) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _72922, [], _72924)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _72922, [], _72924)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _72922, [], _72924)
   Call: (258) [system] atom('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _72922, [], _72924)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _72922, [], _72924)
   Call: (258) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), _82238, _82240)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0])
^  Call: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0], _84124, [], _72924)
^  Unify: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0], [], [])
   Call: (259) [system] var([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0])
^  Redo: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0], _84124, [], _72924)
^  Unify: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0], [_87860|_87862], [], _72924)
^  Call: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _87860, [], _88800)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
   Call: (260) [system] var(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _87860, [], _88800)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _87860, [], _88800)
   Call: (260) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _87860, [], _88800)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _87860, [], _88800)
   Call: (260) [system] compound(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _87860, [], _88800)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Exit: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Call: (259) [user] subst_vars([1589, 0], _87862, [], _72924)
^  Unify: (259) [user] subst_vars([1589, 0], [1589, 0], [], [])
   Call: (260) [system] var([1589, 0])
^  Redo: (259) [user] subst_vars([1589, 0], _87862, [], _72924)
^  Unify: (259) [user] subst_vars([1589, 0], [_103732|_103734], [], _72924)
^  Call: (260) [user] subst_vars(1589, _103732, [], _104672)
^  Unify: (260) [user] subst_vars(1589, 1589, [], [])
   Call: (261) [system] var(1589)
^  Redo: (260) [user] subst_vars(1589, _103732, [], _104672)
^  Unify: (260) [user] subst_vars(1589, _103732, [], _104672)
   Call: (261) [system] atom(1589)
^  Redo: (260) [user] subst_vars(1589, _103732, [], _104672)
^  Unify: (260) [user] subst_vars(1589, _103732, [], _104672)
   Call: (261) [system] compound(1589)
^  Redo: (260) [user] subst_vars(1589, _103732, [], _104672)
^  Unify: (260) [user] subst_vars(1589, 1589, [], [])
^  Exit: (260) [user] subst_vars(1589, 1589, [], [])
^  Call: (260) [user] subst_vars([0], _103734, [], _72924)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _103734, [], _72924)
^  Unify: (260) [user] subst_vars([0], [_119604|_119606], [], _72924)
^  Call: (261) [user] subst_vars(0, _119604, [], _120544)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _119604, [], _120544)
^  Unify: (261) [user] subst_vars(0, _119604, [], _120544)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _119604, [], _120544)
^  Unify: (261) [user] subst_vars(0, _119604, [], _120544)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _119604, [], _120544)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _119606, [], _72924)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _119606, [], _72924)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1589, 0], [1589, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0], [], [])
   Call: (258) [system] compound_name_arguments(_72922, '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), [], [])
   Call: (257) [system] _142962=metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1589, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1590, 0, 57120, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$stream_position'(57120, 1590, 0, 57154)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _195688))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _195688))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _195688)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _195688)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _195688)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _195688)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _201300))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _201300))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _201300))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _201300))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _201300)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _201300)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _206886))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _206886))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _206886)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _206886)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _206886)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _206886)
   Call: (270) [system] var('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _206886)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$VAR'(_214346))
   Call: (270) [system] atom('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _206886)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _206886)
   Call: (270) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _206886)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _206886)
   Call: (270) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _206886)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _206886)
   Call: (270) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0)==[_223626, _223632]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _206886)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _206886)
   Call: (270) [system] is_list('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _206886)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _206886)
   Call: (270) [system] string('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _206886)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _206886)
   Call: (270) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _233828, _233830)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1590, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     let parser = SExprParser::new(r#\"", 1590, 0], _237570)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let parser = SExprParser::new(r#\"", 1590, 0], _237570)
   Call: (271) [apply] apply:maplist_([";;     let parser = SExprParser::new(r#\"", 1590, 0], _237570, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     let parser = SExprParser::new(r#\"", 1590, 0], [_240388|_240390], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _240388)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _240388)
   Call: (273) [system] var(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _240388)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", '$VAR'(_245034))
   Call: (273) [system] atom(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _240388)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _240388)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""==true
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _240388)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _240388)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""==false
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _240388)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _240388)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""==[_254314, _254320]
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _240388)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _240388)
   Call: (273) [system] is_list(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _240388)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _240388)
   Call: (273) [system] string(";;     let parser = SExprParser::new(r#\"")
   Exit: (273) [system] string(";;     let parser = SExprParser::new(r#\"")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _240388)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _240388)
   Call: (273) [system] compound(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _240388)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _240388)
^  Call: (273) [user] symbol(";;     let parser = SExprParser::new(r#\"")
^  Unify: (273) [user] symbol(";;     let parser = SExprParser::new(r#\"")
   Call: (274) [system] atom(";;     let parser = SExprParser::new(r#\"")
   Fail: (274) [system] atom(";;     let parser = SExprParser::new(r#\"")
^  Fail: (273) [user] symbol(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _240388)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""=_240388
   Exit: (273) [system] ";;     let parser = SExprParser::new(r#\""=";;     let parser = SExprParser::new(r#\""
^  Exit: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"")
   Call: (272) [apply] apply:maplist_([1590, 0], _240390, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1590, 0], [_278386|_278388], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1590, _278386)
^  Unify: (273) [user] mfix_vars1(1590, _278386)
   Call: (274) [system] var(1590)
^  Redo: (273) [user] mfix_vars1(1590, _278386)
^  Unify: (273) [user] mfix_vars1(1590, '$VAR'(_283032))
   Call: (274) [system] atom(1590)
^  Redo: (273) [user] mfix_vars1(1590, _278386)
^  Unify: (273) [user] mfix_vars1(1590, _278386)
   Call: (274) [system] 1590==true
^  Redo: (273) [user] mfix_vars1(1590, _278386)
^  Unify: (273) [user] mfix_vars1(1590, _278386)
   Call: (274) [system] 1590==false
^  Redo: (273) [user] mfix_vars1(1590, _278386)
^  Unify: (273) [user] mfix_vars1(1590, _278386)
   Call: (274) [system] 1590==[_292312, _292318]
^  Redo: (273) [user] mfix_vars1(1590, _278386)
^  Unify: (273) [user] mfix_vars1(1590, _278386)
   Call: (274) [system] is_list(1590)
^  Redo: (273) [user] mfix_vars1(1590, _278386)
^  Unify: (273) [user] mfix_vars1(1590, _278386)
   Call: (274) [system] string(1590)
^  Redo: (273) [user] mfix_vars1(1590, _278386)
^  Unify: (273) [user] mfix_vars1(1590, _278386)
   Call: (274) [system] compound(1590)
^  Redo: (273) [user] mfix_vars1(1590, _278386)
^  Unify: (273) [user] mfix_vars1(1590, _278386)
^  Call: (274) [user] symbol(1590)
^  Unify: (274) [user] symbol(1590)
   Call: (275) [system] atom(1590)
   Fail: (275) [system] atom(1590)
^  Fail: (274) [user] symbol(1590)
^  Redo: (273) [user] mfix_vars1(1590, _278386)
   Call: (274) [system] 1590=_278386
   Exit: (274) [system] 1590=1590
^  Exit: (273) [user] mfix_vars1(1590, 1590)
   Call: (273) [apply] apply:maplist_([0], _278388, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_312712|_312714], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _312712)
^  Unify: (274) [user] mfix_vars1(0, _312712)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _312712)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_317358))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _312712)
^  Unify: (274) [user] mfix_vars1(0, _312712)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _312712)
^  Unify: (274) [user] mfix_vars1(0, _312712)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _312712)
^  Unify: (274) [user] mfix_vars1(0, _312712)
   Call: (275) [system] 0==[_326638, _326644]
^  Redo: (274) [user] mfix_vars1(0, _312712)
^  Unify: (274) [user] mfix_vars1(0, _312712)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _312712)
^  Unify: (274) [user] mfix_vars1(0, _312712)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _312712)
^  Unify: (274) [user] mfix_vars1(0, _312712)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _312712)
^  Unify: (274) [user] mfix_vars1(0, _312712)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _312712)
   Call: (275) [system] 0=_312712
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _312714, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1590, 0], [1590, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     let parser = SExprParser::new(r#\"", 1590, 0], [";;     let parser = SExprParser::new(r#\"", 1590, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let parser = SExprParser::new(r#\"", 1590, 0], [";;     let parser = SExprParser::new(r#\"", 1590, 0])
   Call: (270) [system] compound_name_arguments(_206886, '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1590, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1590, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0)))
   Call: (267) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _201300)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _362886))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _362886))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _362886))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _362886))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _362886)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _362886)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _368472))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _368472))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _368472)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _368472)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _368472)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0)))
   Call: (267) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _362886)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _195688))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _195688))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _195688))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _195688))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _195688)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _195688)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _390792))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _390792))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _390792)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _390792)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _390792)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0)))
   Call: (267) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _195688)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0)))
   Call: (261) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _419570, [], _419572)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _419570, [], _419572)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _419570, [], _419572)
   Call: (258) [system] atom('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _419570, [], _419572)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _419570, [], _419572)
   Call: (258) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), _428886, _428888)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1590, 0])
^  Call: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1590, 0], _430772, [], _419572)
^  Unify: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1590, 0], [";;     let parser = SExprParser::new(r#\"", 1590, 0], [], [])
   Call: (259) [system] var([";;     let parser = SExprParser::new(r#\"", 1590, 0])
^  Redo: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1590, 0], _430772, [], _419572)
^  Unify: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1590, 0], [_434508|_434510], [], _419572)
^  Call: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _434508, [], _435448)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"", [], [])
   Call: (260) [system] var(";;     let parser = SExprParser::new(r#\"")
^  Redo: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _434508, [], _435448)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _434508, [], _435448)
   Call: (260) [system] atom(";;     let parser = SExprParser::new(r#\"")
^  Redo: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _434508, [], _435448)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _434508, [], _435448)
   Call: (260) [system] compound(";;     let parser = SExprParser::new(r#\"")
^  Redo: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _434508, [], _435448)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"", [], [])
^  Exit: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"", [], [])
^  Call: (259) [user] subst_vars([1590, 0], _434510, [], _419572)
^  Unify: (259) [user] subst_vars([1590, 0], [1590, 0], [], [])
   Call: (260) [system] var([1590, 0])
^  Redo: (259) [user] subst_vars([1590, 0], _434510, [], _419572)
^  Unify: (259) [user] subst_vars([1590, 0], [_450380|_450382], [], _419572)
^  Call: (260) [user] subst_vars(1590, _450380, [], _451320)
^  Unify: (260) [user] subst_vars(1590, 1590, [], [])
   Call: (261) [system] var(1590)
^  Redo: (260) [user] subst_vars(1590, _450380, [], _451320)
^  Unify: (260) [user] subst_vars(1590, _450380, [], _451320)
   Call: (261) [system] atom(1590)
^  Redo: (260) [user] subst_vars(1590, _450380, [], _451320)
^  Unify: (260) [user] subst_vars(1590, _450380, [], _451320)
   Call: (261) [system] compound(1590)
^  Redo: (260) [user] subst_vars(1590, _450380, [], _451320)
^  Unify: (260) [user] subst_vars(1590, 1590, [], [])
^  Exit: (260) [user] subst_vars(1590, 1590, [], [])
^  Call: (260) [user] subst_vars([0], _450382, [], _419572)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _450382, [], _419572)
^  Unify: (260) [user] subst_vars([0], [_466252|_466254], [], _419572)
^  Call: (261) [user] subst_vars(0, _466252, [], _467192)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _466252, [], _467192)
^  Unify: (261) [user] subst_vars(0, _466252, [], _467192)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _466252, [], _467192)
^  Unify: (261) [user] subst_vars(0, _466252, [], _467192)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _466252, [], _467192)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _466254, [], _419572)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _466254, [], _419572)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1590, 0], [1590, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1590, 0], [";;     let parser = SExprParser::new(r#\"", 1590, 0], [], [])
   Call: (258) [system] compound_name_arguments(_419570, '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1590, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1590, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), [], [])
   Call: (257) [system] _489610=metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1590, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1591, 0, 57161, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$stream_position'(57161, 1591, 0, 57195)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _24378))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _24378))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _24378)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _24378)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _24378)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _24378)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _29990))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _29990))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _29990))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _29990))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _29990)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _29990)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _35576))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _35576))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _35576)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _35576)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _35576)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _35576)
   Call: (270) [system] var('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _35576)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$VAR'(_43036))
   Call: (270) [system] atom('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _35576)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _35576)
   Call: (270) [system] '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _35576)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _35576)
   Call: (270) [system] '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _35576)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _35576)
   Call: (270) [system] '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0)==[_52316, _52322]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _35576)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _35576)
   Call: (270) [system] is_list('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _35576)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _35576)
   Call: (270) [system] string('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _35576)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _35576)
   Call: (270) [system] compound('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _62518, _62520)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT', [";;         (: SomeAtom SomeType)", 1591, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         (: SomeAtom SomeType)", 1591, 0], _66260)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (: SomeAtom SomeType)", 1591, 0], _66260)
   Call: (271) [apply] apply:maplist_([";;         (: SomeAtom SomeType)", 1591, 0], _66260, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         (: SomeAtom SomeType)", 1591, 0], [_69078|_69080], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         (: SomeAtom SomeType)", _69078)
^  Unify: (272) [user] mfix_vars1(";;         (: SomeAtom SomeType)", _69078)
   Call: (273) [system] var(";;         (: SomeAtom SomeType)")
^  Redo: (272) [user] mfix_vars1(";;         (: SomeAtom SomeType)", _69078)
^  Unify: (272) [user] mfix_vars1(";;         (: SomeAtom SomeType)", '$VAR'(_73724))
   Call: (273) [system] atom(";;         (: SomeAtom SomeType)")
^  Redo: (272) [user] mfix_vars1(";;         (: SomeAtom SomeType)", _69078)
^  Unify: (272) [user] mfix_vars1(";;         (: SomeAtom SomeType)", _69078)
   Call: (273) [system] ";;         (: SomeAtom SomeType)"==true
^  Redo: (272) [user] mfix_vars1(";;         (: SomeAtom SomeType)", _69078)
^  Unify: (272) [user] mfix_vars1(";;         (: SomeAtom SomeType)", _69078)
   Call: (273) [system] ";;         (: SomeAtom SomeType)"==false
^  Redo: (272) [user] mfix_vars1(";;         (: SomeAtom SomeType)", _69078)
^  Unify: (272) [user] mfix_vars1(";;         (: SomeAtom SomeType)", _69078)
   Call: (273) [system] ";;         (: SomeAtom SomeType)"==[_83004, _83010]
^  Redo: (272) [user] mfix_vars1(";;         (: SomeAtom SomeType)", _69078)
^  Unify: (272) [user] mfix_vars1(";;         (: SomeAtom SomeType)", _69078)
   Call: (273) [system] is_list(";;         (: SomeAtom SomeType)")
^  Redo: (272) [user] mfix_vars1(";;         (: SomeAtom SomeType)", _69078)
^  Unify: (272) [user] mfix_vars1(";;         (: SomeAtom SomeType)", _69078)
   Call: (273) [system] string(";;         (: SomeAtom SomeType)")
   Exit: (273) [system] string(";;         (: SomeAtom SomeType)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         (: SomeAtom SomeType)", _69078)
^  Unify: (272) [user] mfix_vars1(";;         (: SomeAtom SomeType)", _69078)
   Call: (273) [system] compound(";;         (: SomeAtom SomeType)")
^  Redo: (272) [user] mfix_vars1(";;         (: SomeAtom SomeType)", _69078)
^  Unify: (272) [user] mfix_vars1(";;         (: SomeAtom SomeType)", _69078)
^  Call: (273) [user] symbol(";;         (: SomeAtom SomeType)")
^  Unify: (273) [user] symbol(";;         (: SomeAtom SomeType)")
   Call: (274) [system] atom(";;         (: SomeAtom SomeType)")
   Fail: (274) [system] atom(";;         (: SomeAtom SomeType)")
^  Fail: (273) [user] symbol(";;         (: SomeAtom SomeType)")
^  Redo: (272) [user] mfix_vars1(";;         (: SomeAtom SomeType)", _69078)
   Call: (273) [system] ";;         (: SomeAtom SomeType)"=_69078
   Exit: (273) [system] ";;         (: SomeAtom SomeType)"=";;         (: SomeAtom SomeType)"
^  Exit: (272) [user] mfix_vars1(";;         (: SomeAtom SomeType)", ";;         (: SomeAtom SomeType)")
   Call: (272) [apply] apply:maplist_([1591, 0], _69080, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1591, 0], [_107076|_107078], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1591, _107076)
^  Unify: (273) [user] mfix_vars1(1591, _107076)
   Call: (274) [system] var(1591)
^  Redo: (273) [user] mfix_vars1(1591, _107076)
^  Unify: (273) [user] mfix_vars1(1591, '$VAR'(_111722))
   Call: (274) [system] atom(1591)
^  Redo: (273) [user] mfix_vars1(1591, _107076)
^  Unify: (273) [user] mfix_vars1(1591, _107076)
   Call: (274) [system] 1591==true
^  Redo: (273) [user] mfix_vars1(1591, _107076)
^  Unify: (273) [user] mfix_vars1(1591, _107076)
   Call: (274) [system] 1591==false
^  Redo: (273) [user] mfix_vars1(1591, _107076)
^  Unify: (273) [user] mfix_vars1(1591, _107076)
   Call: (274) [system] 1591==[_121002, _121008]
^  Redo: (273) [user] mfix_vars1(1591, _107076)
^  Unify: (273) [user] mfix_vars1(1591, _107076)
   Call: (274) [system] is_list(1591)
^  Redo: (273) [user] mfix_vars1(1591, _107076)
^  Unify: (273) [user] mfix_vars1(1591, _107076)
   Call: (274) [system] string(1591)
^  Redo: (273) [user] mfix_vars1(1591, _107076)
^  Unify: (273) [user] mfix_vars1(1591, _107076)
   Call: (274) [system] compound(1591)
^  Redo: (273) [user] mfix_vars1(1591, _107076)
^  Unify: (273) [user] mfix_vars1(1591, _107076)
^  Call: (274) [user] symbol(1591)
^  Unify: (274) [user] symbol(1591)
   Call: (275) [system] atom(1591)
   Fail: (275) [system] atom(1591)
^  Fail: (274) [user] symbol(1591)
^  Redo: (273) [user] mfix_vars1(1591, _107076)
   Call: (274) [system] 1591=_107076
   Exit: (274) [system] 1591=1591
^  Exit: (273) [user] mfix_vars1(1591, 1591)
   Call: (273) [apply] apply:maplist_([0], _107078, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_141402|_141404], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _141402)
^  Unify: (274) [user] mfix_vars1(0, _141402)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _141402)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_146048))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _141402)
^  Unify: (274) [user] mfix_vars1(0, _141402)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _141402)
^  Unify: (274) [user] mfix_vars1(0, _141402)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _141402)
^  Unify: (274) [user] mfix_vars1(0, _141402)
   Call: (275) [system] 0==[_155328, _155334]
^  Redo: (274) [user] mfix_vars1(0, _141402)
^  Unify: (274) [user] mfix_vars1(0, _141402)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _141402)
^  Unify: (274) [user] mfix_vars1(0, _141402)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _141402)
^  Unify: (274) [user] mfix_vars1(0, _141402)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _141402)
^  Unify: (274) [user] mfix_vars1(0, _141402)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _141402)
   Call: (275) [system] 0=_141402
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _141404, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1591, 0], [1591, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         (: SomeAtom SomeType)", 1591, 0], [";;         (: SomeAtom SomeType)", 1591, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (: SomeAtom SomeType)", 1591, 0], [";;         (: SomeAtom SomeType)", 1591, 0])
   Call: (270) [system] compound_name_arguments(_35576, '$COMMENT', [";;         (: SomeAtom SomeType)", 1591, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT', [";;         (: SomeAtom SomeType)", 1591, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0)\=@='$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _29990)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _191576))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _191576))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _191576))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _191576))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _191576)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _191576)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _197162))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _197162))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _197162)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _197162)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _197162)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0)\=@='$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _191576)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _24378))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _24378))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _24378))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _24378))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _24378)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _24378)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _219482))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _219482))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _219482)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _219482)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _219482)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0)\=@='$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _24378)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0)))
   Call: (261) [system] '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0)\=@='$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _248260, [], _248262)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _248260, [], _248262)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _248260, [], _248262)
   Call: (258) [system] atom('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _248260, [], _248262)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _248260, [], _248262)
   Call: (258) [system] compound('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), _257576, _257578)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT', [";;         (: SomeAtom SomeType)", 1591, 0])
^  Call: (258) [user] subst_vars([";;         (: SomeAtom SomeType)", 1591, 0], _259462, [], _248262)
^  Unify: (258) [user] subst_vars([";;         (: SomeAtom SomeType)", 1591, 0], [";;         (: SomeAtom SomeType)", 1591, 0], [], [])
   Call: (259) [system] var([";;         (: SomeAtom SomeType)", 1591, 0])
^  Redo: (258) [user] subst_vars([";;         (: SomeAtom SomeType)", 1591, 0], _259462, [], _248262)
^  Unify: (258) [user] subst_vars([";;         (: SomeAtom SomeType)", 1591, 0], [_263198|_263200], [], _248262)
^  Call: (259) [user] subst_vars(";;         (: SomeAtom SomeType)", _263198, [], _264138)
^  Unify: (259) [user] subst_vars(";;         (: SomeAtom SomeType)", ";;         (: SomeAtom SomeType)", [], [])
   Call: (260) [system] var(";;         (: SomeAtom SomeType)")
^  Redo: (259) [user] subst_vars(";;         (: SomeAtom SomeType)", _263198, [], _264138)
^  Unify: (259) [user] subst_vars(";;         (: SomeAtom SomeType)", _263198, [], _264138)
   Call: (260) [system] atom(";;         (: SomeAtom SomeType)")
^  Redo: (259) [user] subst_vars(";;         (: SomeAtom SomeType)", _263198, [], _264138)
^  Unify: (259) [user] subst_vars(";;         (: SomeAtom SomeType)", _263198, [], _264138)
   Call: (260) [system] compound(";;         (: SomeAtom SomeType)")
^  Redo: (259) [user] subst_vars(";;         (: SomeAtom SomeType)", _263198, [], _264138)
^  Unify: (259) [user] subst_vars(";;         (: SomeAtom SomeType)", ";;         (: SomeAtom SomeType)", [], [])
^  Exit: (259) [user] subst_vars(";;         (: SomeAtom SomeType)", ";;         (: SomeAtom SomeType)", [], [])
^  Call: (259) [user] subst_vars([1591, 0], _263200, [], _248262)
^  Unify: (259) [user] subst_vars([1591, 0], [1591, 0], [], [])
   Call: (260) [system] var([1591, 0])
^  Redo: (259) [user] subst_vars([1591, 0], _263200, [], _248262)
^  Unify: (259) [user] subst_vars([1591, 0], [_279070|_279072], [], _248262)
^  Call: (260) [user] subst_vars(1591, _279070, [], _280010)
^  Unify: (260) [user] subst_vars(1591, 1591, [], [])
   Call: (261) [system] var(1591)
^  Redo: (260) [user] subst_vars(1591, _279070, [], _280010)
^  Unify: (260) [user] subst_vars(1591, _279070, [], _280010)
   Call: (261) [system] atom(1591)
^  Redo: (260) [user] subst_vars(1591, _279070, [], _280010)
^  Unify: (260) [user] subst_vars(1591, _279070, [], _280010)
   Call: (261) [system] compound(1591)
^  Redo: (260) [user] subst_vars(1591, _279070, [], _280010)
^  Unify: (260) [user] subst_vars(1591, 1591, [], [])
^  Exit: (260) [user] subst_vars(1591, 1591, [], [])
^  Call: (260) [user] subst_vars([0], _279072, [], _248262)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _279072, [], _248262)
^  Unify: (260) [user] subst_vars([0], [_294942|_294944], [], _248262)
^  Call: (261) [user] subst_vars(0, _294942, [], _295882)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _294942, [], _295882)
^  Unify: (261) [user] subst_vars(0, _294942, [], _295882)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _294942, [], _295882)
^  Unify: (261) [user] subst_vars(0, _294942, [], _295882)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _294942, [], _295882)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _294944, [], _248262)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _294944, [], _248262)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1591, 0], [1591, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         (: SomeAtom SomeType)", 1591, 0], [";;         (: SomeAtom SomeType)", 1591, 0], [], [])
   Call: (258) [system] compound_name_arguments(_248260, '$COMMENT', [";;         (: SomeAtom SomeType)", 1591, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT', [";;         (: SomeAtom SomeType)", 1591, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), [], [])
   Call: (257) [system] _318300=metta_file_buffer(+, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: SomeAtom SomeType)", 1591, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1592, 0, 57194, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$stream_position'(57194, 1592, 0, 57228)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _371034))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _371034))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _371034)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _371034)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _371034)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _371034)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _376646))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _376646))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _376646))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _376646))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _376646)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _376646)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _382232))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _382232))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _382232)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _382232)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _382232)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _382232)
   Call: (270) [system] var('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _382232)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$VAR'(_389692))
   Call: (270) [system] atom('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _382232)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _382232)
   Call: (270) [system] '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _382232)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _382232)
   Call: (270) [system] '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _382232)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _382232)
   Call: (270) [system] '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0)==[_398972, _398978]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _382232)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _382232)
   Call: (270) [system] is_list('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _382232)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _382232)
   Call: (270) [system] string('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _382232)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _382232)
   Call: (270) [system] compound('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _409174, _409176)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT', [";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0], _412916)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0], _412916)
   Call: (271) [apply] apply:maplist_([";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0], _412916, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0], [_415734|_415736], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _415734)
^  Unify: (272) [user] mfix_vars1(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _415734)
   Call: (273) [system] var(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))")
^  Redo: (272) [user] mfix_vars1(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _415734)
^  Unify: (272) [user] mfix_vars1(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", '$VAR'(_420380))
   Call: (273) [system] atom(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))")
^  Redo: (272) [user] mfix_vars1(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _415734)
^  Unify: (272) [user] mfix_vars1(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _415734)
   Call: (273) [system] ";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))"==true
^  Redo: (272) [user] mfix_vars1(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _415734)
^  Unify: (272) [user] mfix_vars1(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _415734)
   Call: (273) [system] ";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))"==false
^  Redo: (272) [user] mfix_vars1(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _415734)
^  Unify: (272) [user] mfix_vars1(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _415734)
   Call: (273) [system] ";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))"==[_429660, _429666]
^  Redo: (272) [user] mfix_vars1(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _415734)
^  Unify: (272) [user] mfix_vars1(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _415734)
   Call: (273) [system] is_list(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))")
^  Redo: (272) [user] mfix_vars1(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _415734)
^  Unify: (272) [user] mfix_vars1(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _415734)
   Call: (273) [system] string(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))")
   Exit: (273) [system] string(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _415734)
^  Unify: (272) [user] mfix_vars1(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _415734)
   Call: (273) [system] compound(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))")
^  Redo: (272) [user] mfix_vars1(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _415734)
^  Unify: (272) [user] mfix_vars1(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _415734)
^  Call: (273) [user] symbol(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))")
^  Unify: (273) [user] symbol(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))")
   Call: (274) [system] atom(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))")
   Fail: (274) [system] atom(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))")
^  Fail: (273) [user] symbol(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))")
^  Redo: (272) [user] mfix_vars1(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _415734)
   Call: (273) [system] ";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))"=_415734
   Exit: (273) [system] ";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))"=";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))"
^  Exit: (272) [user] mfix_vars1(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", ";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))")
   Call: (272) [apply] apply:maplist_([1592, 0], _415736, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1592, 0], [_453732|_453734], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1592, _453732)
^  Unify: (273) [user] mfix_vars1(1592, _453732)
   Call: (274) [system] var(1592)
^  Redo: (273) [user] mfix_vars1(1592, _453732)
^  Unify: (273) [user] mfix_vars1(1592, '$VAR'(_458378))
   Call: (274) [system] atom(1592)
^  Redo: (273) [user] mfix_vars1(1592, _453732)
^  Unify: (273) [user] mfix_vars1(1592, _453732)
   Call: (274) [system] 1592==true
^  Redo: (273) [user] mfix_vars1(1592, _453732)
^  Unify: (273) [user] mfix_vars1(1592, _453732)
   Call: (274) [system] 1592==false
^  Redo: (273) [user] mfix_vars1(1592, _453732)
^  Unify: (273) [user] mfix_vars1(1592, _453732)
   Call: (274) [system] 1592==[_467658, _467664]
^  Redo: (273) [user] mfix_vars1(1592, _453732)
^  Unify: (273) [user] mfix_vars1(1592, _453732)
   Call: (274) [system] is_list(1592)
^  Redo: (273) [user] mfix_vars1(1592, _453732)
^  Unify: (273) [user] mfix_vars1(1592, _453732)
   Call: (274) [system] string(1592)
^  Redo: (273) [user] mfix_vars1(1592, _453732)
^  Unify: (273) [user] mfix_vars1(1592, _453732)
   Call: (274) [system] compound(1592)
^  Redo: (273) [user] mfix_vars1(1592, _453732)
^  Unify: (273) [user] mfix_vars1(1592, _453732)
^  Call: (274) [user] symbol(1592)
^  Unify: (274) [user] symbol(1592)
   Call: (275) [system] atom(1592)
   Fail: (275) [system] atom(1592)
^  Fail: (274) [user] symbol(1592)
^  Redo: (273) [user] mfix_vars1(1592, _453732)
   Call: (274) [system] 1592=_453732
   Exit: (274) [system] 1592=1592
^  Exit: (273) [user] mfix_vars1(1592, 1592)
   Call: (273) [apply] apply:maplist_([0], _453734, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_488058|_488060], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _488058)
^  Unify: (274) [user] mfix_vars1(0, _488058)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _488058)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_492704))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _488058)
^  Unify: (274) [user] mfix_vars1(0, _488058)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _488058)
^  Unify: (274) [user] mfix_vars1(0, _488058)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _488058)
^  Unify: (274) [user] mfix_vars1(0, _488058)
   Call: (275) [system] 0==[_501984, _501990]
^  Redo: (274) [user] mfix_vars1(0, _488058)
^  Unify: (274) [user] mfix_vars1(0, _488058)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _488058)
^  Unify: (274) [user] mfix_vars1(0, _488058)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _488058)
^  Unify: (274) [user] mfix_vars1(0, _488058)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _488058)
^  Unify: (274) [user] mfix_vars1(0, _488058)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _488058)
   Call: (275) [system] 0=_488058
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _488060, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1592, 0], [1592, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0], [";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0], [";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0])
   Call: (270) [system] compound_name_arguments(_5994, '$COMMENT', [";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT', [";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0)))
   Call: (267) [system] '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0)\=@='$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _5980)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _20402))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _20402))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _20402))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _20402))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _20402)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _20402)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _25988))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _25988))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _25988)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _25988)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _25988)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0)))
   Call: (267) [system] '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0)\=@='$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _20402)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _5960))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _5960))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _5960))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _5960))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _5960)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _5960)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _48308))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _48308))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _48308)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _48308)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _48308)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0)))
   Call: (267) [system] '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0)\=@='$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _5960)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0)))
   Call: (261) [system] '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0)\=@='$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _77086, [], _77088)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _77086, [], _77088)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _77086, [], _77088)
   Call: (258) [system] atom('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _77086, [], _77088)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _77086, [], _77088)
   Call: (258) [system] compound('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), _86402, _86404)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT', [";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0])
^  Call: (258) [user] subst_vars([";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0], _88288, [], _77088)
^  Unify: (258) [user] subst_vars([";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0], [";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0], [], [])
   Call: (259) [system] var([";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0])
^  Redo: (258) [user] subst_vars([";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0], _88288, [], _77088)
^  Unify: (258) [user] subst_vars([";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0], [_92024|_92026], [], _77088)
^  Call: (259) [user] subst_vars(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _92024, [], _92964)
^  Unify: (259) [user] subst_vars(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", ";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", [], [])
   Call: (260) [system] var(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))")
^  Redo: (259) [user] subst_vars(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _92024, [], _92964)
^  Unify: (259) [user] subst_vars(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _92024, [], _92964)
   Call: (260) [system] atom(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))")
^  Redo: (259) [user] subst_vars(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _92024, [], _92964)
^  Unify: (259) [user] subst_vars(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _92024, [], _92964)
   Call: (260) [system] compound(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))")
^  Redo: (259) [user] subst_vars(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", _92024, [], _92964)
^  Unify: (259) [user] subst_vars(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", ";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", [], [])
^  Exit: (259) [user] subst_vars(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", ";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", [], [])
^  Call: (259) [user] subst_vars([1592, 0], _92026, [], _77088)
^  Unify: (259) [user] subst_vars([1592, 0], [1592, 0], [], [])
   Call: (260) [system] var([1592, 0])
^  Redo: (259) [user] subst_vars([1592, 0], _92026, [], _77088)
^  Unify: (259) [user] subst_vars([1592, 0], [_107896|_107898], [], _77088)
^  Call: (260) [user] subst_vars(1592, _107896, [], _108836)
^  Unify: (260) [user] subst_vars(1592, 1592, [], [])
   Call: (261) [system] var(1592)
^  Redo: (260) [user] subst_vars(1592, _107896, [], _108836)
^  Unify: (260) [user] subst_vars(1592, _107896, [], _108836)
   Call: (261) [system] atom(1592)
^  Redo: (260) [user] subst_vars(1592, _107896, [], _108836)
^  Unify: (260) [user] subst_vars(1592, _107896, [], _108836)
   Call: (261) [system] compound(1592)
^  Redo: (260) [user] subst_vars(1592, _107896, [], _108836)
^  Unify: (260) [user] subst_vars(1592, 1592, [], [])
^  Exit: (260) [user] subst_vars(1592, 1592, [], [])
^  Call: (260) [user] subst_vars([0], _107898, [], _77088)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _107898, [], _77088)
^  Unify: (260) [user] subst_vars([0], [_123768|_123770], [], _77088)
^  Call: (261) [user] subst_vars(0, _123768, [], _124708)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _123768, [], _124708)
^  Unify: (261) [user] subst_vars(0, _123768, [], _124708)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _123768, [], _124708)
^  Unify: (261) [user] subst_vars(0, _123768, [], _124708)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _123768, [], _124708)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _123770, [], _77088)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _123770, [], _77088)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1592, 0], [1592, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0], [";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0], [], [])
   Call: (258) [system] compound_name_arguments(_77086, '$COMMENT', [";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT', [";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), [], [])
   Call: (257) [system] _147126=metta_file_buffer(+, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (@doc SomeAtom (@desc \"Test symbol atom having specific type\"))", 1592, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1593, 0, 57269, '$COMMENT'(";;", 1593, 0), '$stream_position'(57269, 1593, 0, 57303)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1593, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1593, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1593, 0), _199842))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1593, 0), _199842))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1593, 0), _199842)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1593, 0), _199842)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1593, 0), _199842)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1593, 0), _199842)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1593, 0), _205454))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1593, 0), _205454))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1593, 0), _205454))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1593, 0), _205454))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1593, 0), _205454)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1593, 0), _205454)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1593, 0), _211040))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1593, 0), _211040))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1593, 0), _211040)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1593, 0), _211040)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1593, 0), _211040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1593, 0), _211040)
   Call: (270) [system] var('$COMMENT'(";;", 1593, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1593, 0), _211040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1593, 0), '$VAR'(_218500))
   Call: (270) [system] atom('$COMMENT'(";;", 1593, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1593, 0), _211040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1593, 0), _211040)
   Call: (270) [system] '$COMMENT'(";;", 1593, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1593, 0), _211040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1593, 0), _211040)
   Call: (270) [system] '$COMMENT'(";;", 1593, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1593, 0), _211040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1593, 0), _211040)
   Call: (270) [system] '$COMMENT'(";;", 1593, 0)==[_227780, _227786]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1593, 0), _211040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1593, 0), _211040)
   Call: (270) [system] is_list('$COMMENT'(";;", 1593, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1593, 0), _211040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1593, 0), _211040)
   Call: (270) [system] string('$COMMENT'(";;", 1593, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1593, 0), _211040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1593, 0), _211040)
   Call: (270) [system] compound('$COMMENT'(";;", 1593, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1593, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1593, 0), _237982, _237984)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1593, 0), '$COMMENT', [";;", 1593, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1593, 0], _241724)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1593, 0], _241724)
   Call: (271) [apply] apply:maplist_([";;", 1593, 0], _241724, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1593, 0], [_244542|_244544], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _244542)
^  Unify: (272) [user] mfix_vars1(";;", _244542)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _244542)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_249188))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _244542)
^  Unify: (272) [user] mfix_vars1(";;", _244542)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _244542)
^  Unify: (272) [user] mfix_vars1(";;", _244542)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _244542)
^  Unify: (272) [user] mfix_vars1(";;", _244542)
   Call: (273) [system] ";;"==[_258468, _258474]
^  Redo: (272) [user] mfix_vars1(";;", _244542)
^  Unify: (272) [user] mfix_vars1(";;", _244542)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _244542)
^  Unify: (272) [user] mfix_vars1(";;", _244542)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _244542)
^  Unify: (272) [user] mfix_vars1(";;", _244542)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _244542)
^  Unify: (272) [user] mfix_vars1(";;", _244542)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _244542)
   Call: (273) [system] ";;"=_244542
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1593, 0], _244544, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1593, 0], [_282540|_282542], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1593, _282540)
^  Unify: (273) [user] mfix_vars1(1593, _282540)
   Call: (274) [system] var(1593)
^  Redo: (273) [user] mfix_vars1(1593, _282540)
^  Unify: (273) [user] mfix_vars1(1593, '$VAR'(_287186))
   Call: (274) [system] atom(1593)
^  Redo: (273) [user] mfix_vars1(1593, _282540)
^  Unify: (273) [user] mfix_vars1(1593, _282540)
   Call: (274) [system] 1593==true
^  Redo: (273) [user] mfix_vars1(1593, _282540)
^  Unify: (273) [user] mfix_vars1(1593, _282540)
   Call: (274) [system] 1593==false
^  Redo: (273) [user] mfix_vars1(1593, _282540)
^  Unify: (273) [user] mfix_vars1(1593, _282540)
   Call: (274) [system] 1593==[_296466, _296472]
^  Redo: (273) [user] mfix_vars1(1593, _282540)
^  Unify: (273) [user] mfix_vars1(1593, _282540)
   Call: (274) [system] is_list(1593)
^  Redo: (273) [user] mfix_vars1(1593, _282540)
^  Unify: (273) [user] mfix_vars1(1593, _282540)
   Call: (274) [system] string(1593)
^  Redo: (273) [user] mfix_vars1(1593, _282540)
^  Unify: (273) [user] mfix_vars1(1593, _282540)
   Call: (274) [system] compound(1593)
^  Redo: (273) [user] mfix_vars1(1593, _282540)
^  Unify: (273) [user] mfix_vars1(1593, _282540)
^  Call: (274) [user] symbol(1593)
^  Unify: (274) [user] symbol(1593)
   Call: (275) [system] atom(1593)
   Fail: (275) [system] atom(1593)
^  Fail: (274) [user] symbol(1593)
^  Redo: (273) [user] mfix_vars1(1593, _282540)
   Call: (274) [system] 1593=_282540
   Exit: (274) [system] 1593=1593
^  Exit: (273) [user] mfix_vars1(1593, 1593)
   Call: (273) [apply] apply:maplist_([0], _282542, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_316866|_316868], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _316866)
^  Unify: (274) [user] mfix_vars1(0, _316866)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _316866)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_321512))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _316866)
^  Unify: (274) [user] mfix_vars1(0, _316866)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _316866)
^  Unify: (274) [user] mfix_vars1(0, _316866)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _316866)
^  Unify: (274) [user] mfix_vars1(0, _316866)
   Call: (275) [system] 0==[_330792, _330798]
^  Redo: (274) [user] mfix_vars1(0, _316866)
^  Unify: (274) [user] mfix_vars1(0, _316866)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _316866)
^  Unify: (274) [user] mfix_vars1(0, _316866)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _316866)
^  Unify: (274) [user] mfix_vars1(0, _316866)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _316866)
^  Unify: (274) [user] mfix_vars1(0, _316866)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _316866)
   Call: (275) [system] 0=_316866
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _316868, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1593, 0], [1593, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1593, 0], [";;", 1593, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1593, 0], [";;", 1593, 0])
   Call: (270) [system] compound_name_arguments(_211040, '$COMMENT', [";;", 1593, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1593, 0), '$COMMENT', [";;", 1593, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1593, 0)\=@='$COMMENT'(";;", 1593, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1593, 0), _205454)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1593, 0), _367040))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1593, 0), _367040))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1593, 0), _367040))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1593, 0), _367040))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1593, 0), _367040)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1593, 0), _367040)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1593, 0), _372626))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1593, 0), _372626))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1593, 0), _372626)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1593, 0), _372626)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1593, 0), _372626)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1593, 0)\=@='$COMMENT'(";;", 1593, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1593, 0), _367040)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1593, 0), _199842))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1593, 0), _199842))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1593, 0), _199842))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1593, 0), _199842))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1593, 0), _199842)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1593, 0), _199842)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1593, 0), _394946))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1593, 0), _394946))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1593, 0), _394946)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1593, 0), _394946)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1593, 0), _394946)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1593, 0)\=@='$COMMENT'(";;", 1593, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1593, 0), _199842)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1593, 0)\=@='$COMMENT'(";;", 1593, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1593, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1593, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1593, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1593, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1593, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1593, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1593, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1593, 0), _423724, [], _423726)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1593, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1593, 0), _423724, [], _423726)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1593, 0), _423724, [], _423726)
   Call: (258) [system] atom('$COMMENT'(";;", 1593, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1593, 0), _423724, [], _423726)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1593, 0), _423724, [], _423726)
   Call: (258) [system] compound('$COMMENT'(";;", 1593, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1593, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1593, 0), _433040, _433042)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1593, 0), '$COMMENT', [";;", 1593, 0])
^  Call: (258) [user] subst_vars([";;", 1593, 0], _434926, [], _423726)
^  Unify: (258) [user] subst_vars([";;", 1593, 0], [";;", 1593, 0], [], [])
   Call: (259) [system] var([";;", 1593, 0])
^  Redo: (258) [user] subst_vars([";;", 1593, 0], _434926, [], _423726)
^  Unify: (258) [user] subst_vars([";;", 1593, 0], [_438662|_438664], [], _423726)
^  Call: (259) [user] subst_vars(";;", _438662, [], _439602)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _438662, [], _439602)
^  Unify: (259) [user] subst_vars(";;", _438662, [], _439602)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _438662, [], _439602)
^  Unify: (259) [user] subst_vars(";;", _438662, [], _439602)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _438662, [], _439602)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1593, 0], _438664, [], _423726)
^  Unify: (259) [user] subst_vars([1593, 0], [1593, 0], [], [])
   Call: (260) [system] var([1593, 0])
^  Redo: (259) [user] subst_vars([1593, 0], _438664, [], _423726)
^  Unify: (259) [user] subst_vars([1593, 0], [_454534|_454536], [], _423726)
^  Call: (260) [user] subst_vars(1593, _454534, [], _455474)
^  Unify: (260) [user] subst_vars(1593, 1593, [], [])
   Call: (261) [system] var(1593)
^  Redo: (260) [user] subst_vars(1593, _454534, [], _455474)
^  Unify: (260) [user] subst_vars(1593, _454534, [], _455474)
   Call: (261) [system] atom(1593)
^  Redo: (260) [user] subst_vars(1593, _454534, [], _455474)
^  Unify: (260) [user] subst_vars(1593, _454534, [], _455474)
   Call: (261) [system] compound(1593)
^  Redo: (260) [user] subst_vars(1593, _454534, [], _455474)
^  Unify: (260) [user] subst_vars(1593, 1593, [], [])
^  Exit: (260) [user] subst_vars(1593, 1593, [], [])
^  Call: (260) [user] subst_vars([0], _454536, [], _423726)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _454536, [], _423726)
^  Unify: (260) [user] subst_vars([0], [_470406|_470408], [], _423726)
^  Call: (261) [user] subst_vars(0, _470406, [], _471346)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _470406, [], _471346)
^  Unify: (261) [user] subst_vars(0, _470406, [], _471346)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _470406, [], _471346)
^  Unify: (261) [user] subst_vars(0, _470406, [], _471346)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _470406, [], _471346)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _470408, [], _423726)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _470408, [], _423726)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1593, 0], [1593, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1593, 0], [";;", 1593, 0], [], [])
   Call: (258) [system] compound_name_arguments(_423724, '$COMMENT', [";;", 1593, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1593, 0), '$COMMENT', [";;", 1593, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1593, 0), '$COMMENT'(";;", 1593, 0), [], [])
   Call: (257) [system] _493764=metta_file_buffer(+, '$COMMENT'(";;", 1593, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1593, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1593, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1593, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1593, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1593, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1593, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1593, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1593, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1594, 0, 57272, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$stream_position'(57272, 1594, 0, 57306)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _28972))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _28972))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _28972)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _28972)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _28972)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _28972)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _34584))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _34584))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _34584))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _34584))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _34584)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _34584)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _40170))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _40170))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _40170)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _40170)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _40170)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _40170)
   Call: (270) [system] var('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _40170)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$VAR'(_47630))
   Call: (270) [system] atom('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _40170)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _40170)
   Call: (270) [system] '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _40170)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _40170)
   Call: (270) [system] '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _40170)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _40170)
   Call: (270) [system] '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0)==[_56910, _56916]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _40170)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _40170)
   Call: (270) [system] is_list('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _40170)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _40170)
   Call: (270) [system] string('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _40170)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _40170)
   Call: (270) [system] compound('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _67112, _67114)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT', [";;         !(get-doc SomeAtom)", 1594, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         !(get-doc SomeAtom)", 1594, 0], _70854)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(get-doc SomeAtom)", 1594, 0], _70854)
   Call: (271) [apply] apply:maplist_([";;         !(get-doc SomeAtom)", 1594, 0], _70854, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         !(get-doc SomeAtom)", 1594, 0], [_73672|_73674], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         !(get-doc SomeAtom)", _73672)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc SomeAtom)", _73672)
   Call: (273) [system] var(";;         !(get-doc SomeAtom)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc SomeAtom)", _73672)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc SomeAtom)", '$VAR'(_78318))
   Call: (273) [system] atom(";;         !(get-doc SomeAtom)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc SomeAtom)", _73672)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc SomeAtom)", _73672)
   Call: (273) [system] ";;         !(get-doc SomeAtom)"==true
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc SomeAtom)", _73672)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc SomeAtom)", _73672)
   Call: (273) [system] ";;         !(get-doc SomeAtom)"==false
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc SomeAtom)", _73672)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc SomeAtom)", _73672)
   Call: (273) [system] ";;         !(get-doc SomeAtom)"==[_87598, _87604]
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc SomeAtom)", _73672)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc SomeAtom)", _73672)
   Call: (273) [system] is_list(";;         !(get-doc SomeAtom)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc SomeAtom)", _73672)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc SomeAtom)", _73672)
   Call: (273) [system] string(";;         !(get-doc SomeAtom)")
   Exit: (273) [system] string(";;         !(get-doc SomeAtom)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc SomeAtom)", _73672)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc SomeAtom)", _73672)
   Call: (273) [system] compound(";;         !(get-doc SomeAtom)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc SomeAtom)", _73672)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc SomeAtom)", _73672)
^  Call: (273) [user] symbol(";;         !(get-doc SomeAtom)")
^  Unify: (273) [user] symbol(";;         !(get-doc SomeAtom)")
   Call: (274) [system] atom(";;         !(get-doc SomeAtom)")
   Fail: (274) [system] atom(";;         !(get-doc SomeAtom)")
^  Fail: (273) [user] symbol(";;         !(get-doc SomeAtom)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc SomeAtom)", _73672)
   Call: (273) [system] ";;         !(get-doc SomeAtom)"=_73672
   Exit: (273) [system] ";;         !(get-doc SomeAtom)"=";;         !(get-doc SomeAtom)"
^  Exit: (272) [user] mfix_vars1(";;         !(get-doc SomeAtom)", ";;         !(get-doc SomeAtom)")
   Call: (272) [apply] apply:maplist_([1594, 0], _73674, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1594, 0], [_111670|_111672], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1594, _111670)
^  Unify: (273) [user] mfix_vars1(1594, _111670)
   Call: (274) [system] var(1594)
^  Redo: (273) [user] mfix_vars1(1594, _111670)
^  Unify: (273) [user] mfix_vars1(1594, '$VAR'(_116316))
   Call: (274) [system] atom(1594)
^  Redo: (273) [user] mfix_vars1(1594, _111670)
^  Unify: (273) [user] mfix_vars1(1594, _111670)
   Call: (274) [system] 1594==true
^  Redo: (273) [user] mfix_vars1(1594, _111670)
^  Unify: (273) [user] mfix_vars1(1594, _111670)
   Call: (274) [system] 1594==false
^  Redo: (273) [user] mfix_vars1(1594, _111670)
^  Unify: (273) [user] mfix_vars1(1594, _111670)
   Call: (274) [system] 1594==[_125596, _125602]
^  Redo: (273) [user] mfix_vars1(1594, _111670)
^  Unify: (273) [user] mfix_vars1(1594, _111670)
   Call: (274) [system] is_list(1594)
^  Redo: (273) [user] mfix_vars1(1594, _111670)
^  Unify: (273) [user] mfix_vars1(1594, _111670)
   Call: (274) [system] string(1594)
^  Redo: (273) [user] mfix_vars1(1594, _111670)
^  Unify: (273) [user] mfix_vars1(1594, _111670)
   Call: (274) [system] compound(1594)
^  Redo: (273) [user] mfix_vars1(1594, _111670)
^  Unify: (273) [user] mfix_vars1(1594, _111670)
^  Call: (274) [user] symbol(1594)
^  Unify: (274) [user] symbol(1594)
   Call: (275) [system] atom(1594)
   Fail: (275) [system] atom(1594)
^  Fail: (274) [user] symbol(1594)
^  Redo: (273) [user] mfix_vars1(1594, _111670)
   Call: (274) [system] 1594=_111670
   Exit: (274) [system] 1594=1594
^  Exit: (273) [user] mfix_vars1(1594, 1594)
   Call: (273) [apply] apply:maplist_([0], _111672, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_145996|_145998], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _145996)
^  Unify: (274) [user] mfix_vars1(0, _145996)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _145996)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_150642))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _145996)
^  Unify: (274) [user] mfix_vars1(0, _145996)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _145996)
^  Unify: (274) [user] mfix_vars1(0, _145996)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _145996)
^  Unify: (274) [user] mfix_vars1(0, _145996)
   Call: (275) [system] 0==[_159922, _159928]
^  Redo: (274) [user] mfix_vars1(0, _145996)
^  Unify: (274) [user] mfix_vars1(0, _145996)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _145996)
^  Unify: (274) [user] mfix_vars1(0, _145996)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _145996)
^  Unify: (274) [user] mfix_vars1(0, _145996)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _145996)
^  Unify: (274) [user] mfix_vars1(0, _145996)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _145996)
   Call: (275) [system] 0=_145996
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _145998, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1594, 0], [1594, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         !(get-doc SomeAtom)", 1594, 0], [";;         !(get-doc SomeAtom)", 1594, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(get-doc SomeAtom)", 1594, 0], [";;         !(get-doc SomeAtom)", 1594, 0])
   Call: (270) [system] compound_name_arguments(_40170, '$COMMENT', [";;         !(get-doc SomeAtom)", 1594, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT', [";;         !(get-doc SomeAtom)", 1594, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0)\=@='$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _34584)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _196170))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _196170))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _196170))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _196170))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _196170)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _196170)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _201756))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _201756))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _201756)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _201756)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _201756)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0)\=@='$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _196170)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _28972))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _28972))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _28972))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _28972))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _28972)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _28972)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _224076))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _224076))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _224076)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _224076)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _224076)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0)\=@='$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _28972)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0)))
   Call: (261) [system] '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0)\=@='$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _252854, [], _252856)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _252854, [], _252856)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _252854, [], _252856)
   Call: (258) [system] atom('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _252854, [], _252856)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _252854, [], _252856)
   Call: (258) [system] compound('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), _262170, _262172)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT', [";;         !(get-doc SomeAtom)", 1594, 0])
^  Call: (258) [user] subst_vars([";;         !(get-doc SomeAtom)", 1594, 0], _264056, [], _252856)
^  Unify: (258) [user] subst_vars([";;         !(get-doc SomeAtom)", 1594, 0], [";;         !(get-doc SomeAtom)", 1594, 0], [], [])
   Call: (259) [system] var([";;         !(get-doc SomeAtom)", 1594, 0])
^  Redo: (258) [user] subst_vars([";;         !(get-doc SomeAtom)", 1594, 0], _264056, [], _252856)
^  Unify: (258) [user] subst_vars([";;         !(get-doc SomeAtom)", 1594, 0], [_267792|_267794], [], _252856)
^  Call: (259) [user] subst_vars(";;         !(get-doc SomeAtom)", _267792, [], _268732)
^  Unify: (259) [user] subst_vars(";;         !(get-doc SomeAtom)", ";;         !(get-doc SomeAtom)", [], [])
   Call: (260) [system] var(";;         !(get-doc SomeAtom)")
^  Redo: (259) [user] subst_vars(";;         !(get-doc SomeAtom)", _267792, [], _268732)
^  Unify: (259) [user] subst_vars(";;         !(get-doc SomeAtom)", _267792, [], _268732)
   Call: (260) [system] atom(";;         !(get-doc SomeAtom)")
^  Redo: (259) [user] subst_vars(";;         !(get-doc SomeAtom)", _267792, [], _268732)
^  Unify: (259) [user] subst_vars(";;         !(get-doc SomeAtom)", _267792, [], _268732)
   Call: (260) [system] compound(";;         !(get-doc SomeAtom)")
^  Redo: (259) [user] subst_vars(";;         !(get-doc SomeAtom)", _267792, [], _268732)
^  Unify: (259) [user] subst_vars(";;         !(get-doc SomeAtom)", ";;         !(get-doc SomeAtom)", [], [])
^  Exit: (259) [user] subst_vars(";;         !(get-doc SomeAtom)", ";;         !(get-doc SomeAtom)", [], [])
^  Call: (259) [user] subst_vars([1594, 0], _267794, [], _252856)
^  Unify: (259) [user] subst_vars([1594, 0], [1594, 0], [], [])
   Call: (260) [system] var([1594, 0])
^  Redo: (259) [user] subst_vars([1594, 0], _267794, [], _252856)
^  Unify: (259) [user] subst_vars([1594, 0], [_283664|_283666], [], _252856)
^  Call: (260) [user] subst_vars(1594, _283664, [], _284604)
^  Unify: (260) [user] subst_vars(1594, 1594, [], [])
   Call: (261) [system] var(1594)
^  Redo: (260) [user] subst_vars(1594, _283664, [], _284604)
^  Unify: (260) [user] subst_vars(1594, _283664, [], _284604)
   Call: (261) [system] atom(1594)
^  Redo: (260) [user] subst_vars(1594, _283664, [], _284604)
^  Unify: (260) [user] subst_vars(1594, _283664, [], _284604)
   Call: (261) [system] compound(1594)
^  Redo: (260) [user] subst_vars(1594, _283664, [], _284604)
^  Unify: (260) [user] subst_vars(1594, 1594, [], [])
^  Exit: (260) [user] subst_vars(1594, 1594, [], [])
^  Call: (260) [user] subst_vars([0], _283666, [], _252856)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _283666, [], _252856)
^  Unify: (260) [user] subst_vars([0], [_299536|_299538], [], _252856)
^  Call: (261) [user] subst_vars(0, _299536, [], _300476)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _299536, [], _300476)
^  Unify: (261) [user] subst_vars(0, _299536, [], _300476)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _299536, [], _300476)
^  Unify: (261) [user] subst_vars(0, _299536, [], _300476)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _299536, [], _300476)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _299538, [], _252856)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _299538, [], _252856)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1594, 0], [1594, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         !(get-doc SomeAtom)", 1594, 0], [";;         !(get-doc SomeAtom)", 1594, 0], [], [])
   Call: (258) [system] compound_name_arguments(_252854, '$COMMENT', [";;         !(get-doc SomeAtom)", 1594, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT', [";;         !(get-doc SomeAtom)", 1594, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), [], [])
   Call: (257) [system] _322894=metta_file_buffer(+, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc SomeAtom)", 1594, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1595, 0, 57303, '$COMMENT'(";;     \"#);", 1595, 0), '$stream_position'(57303, 1595, 0, 57337)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1595, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1595, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1595, 0), _375612))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1595, 0), _375612))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1595, 0), _375612)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     \"#);", 1595, 0), _375612)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     \"#);", 1595, 0), _375612)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     \"#);", 1595, 0), _375612)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1595, 0), _381224))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1595, 0), _381224))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1595, 0), _381224))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1595, 0), _381224))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1595, 0), _381224)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1595, 0), _381224)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     \"#);", 1595, 0), _386810))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     \"#);", 1595, 0), _386810))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     \"#);", 1595, 0), _386810)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     \"#);", 1595, 0), _386810)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1595, 0), _386810)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1595, 0), _386810)
   Call: (270) [system] var('$COMMENT'(";;     \"#);", 1595, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1595, 0), _386810)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1595, 0), '$VAR'(_394270))
   Call: (270) [system] atom('$COMMENT'(";;     \"#);", 1595, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1595, 0), _386810)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1595, 0), _386810)
   Call: (270) [system] '$COMMENT'(";;     \"#);", 1595, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1595, 0), _386810)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1595, 0), _386810)
   Call: (270) [system] '$COMMENT'(";;     \"#);", 1595, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1595, 0), _386810)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1595, 0), _386810)
   Call: (270) [system] '$COMMENT'(";;     \"#);", 1595, 0)==[_403550, _403556]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1595, 0), _386810)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1595, 0), _386810)
   Call: (270) [system] is_list('$COMMENT'(";;     \"#);", 1595, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1595, 0), _386810)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1595, 0), _386810)
   Call: (270) [system] string('$COMMENT'(";;     \"#);", 1595, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1595, 0), _386810)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1595, 0), _386810)
   Call: (270) [system] compound('$COMMENT'(";;     \"#);", 1595, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     \"#);", 1595, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1595, 0), _413752, _413754)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT', [";;     \"#);", 1595, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     \"#);", 1595, 0], _417494)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     \"#);", 1595, 0], _417494)
   Call: (271) [apply] apply:maplist_([";;     \"#);", 1595, 0], _417494, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     \"#);", 1595, 0], [_420312|_420314], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     \"#);", _420312)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _420312)
   Call: (273) [system] var(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _420312)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", '$VAR'(_424958))
   Call: (273) [system] atom(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _420312)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _420312)
   Call: (273) [system] ";;     \"#);"==true
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _420312)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _420312)
   Call: (273) [system] ";;     \"#);"==false
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _420312)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _420312)
   Call: (273) [system] ";;     \"#);"==[_434238, _434244]
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _420312)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _420312)
   Call: (273) [system] is_list(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _420312)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _420312)
   Call: (273) [system] string(";;     \"#);")
   Exit: (273) [system] string(";;     \"#);")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _420312)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _420312)
   Call: (273) [system] compound(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _420312)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _420312)
^  Call: (273) [user] symbol(";;     \"#);")
^  Unify: (273) [user] symbol(";;     \"#);")
   Call: (274) [system] atom(";;     \"#);")
   Fail: (274) [system] atom(";;     \"#);")
^  Fail: (273) [user] symbol(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _420312)
   Call: (273) [system] ";;     \"#);"=_420312
   Exit: (273) [system] ";;     \"#);"=";;     \"#);"
^  Exit: (272) [user] mfix_vars1(";;     \"#);", ";;     \"#);")
   Call: (272) [apply] apply:maplist_([1595, 0], _420314, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1595, 0], [_458310|_458312], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1595, _458310)
^  Unify: (273) [user] mfix_vars1(1595, _458310)
   Call: (274) [system] var(1595)
^  Redo: (273) [user] mfix_vars1(1595, _458310)
^  Unify: (273) [user] mfix_vars1(1595, '$VAR'(_462956))
   Call: (274) [system] atom(1595)
^  Redo: (273) [user] mfix_vars1(1595, _458310)
^  Unify: (273) [user] mfix_vars1(1595, _458310)
   Call: (274) [system] 1595==true
^  Redo: (273) [user] mfix_vars1(1595, _458310)
^  Unify: (273) [user] mfix_vars1(1595, _458310)
   Call: (274) [system] 1595==false
^  Redo: (273) [user] mfix_vars1(1595, _458310)
^  Unify: (273) [user] mfix_vars1(1595, _458310)
   Call: (274) [system] 1595==[_472236, _472242]
^  Redo: (273) [user] mfix_vars1(1595, _458310)
^  Unify: (273) [user] mfix_vars1(1595, _458310)
   Call: (274) [system] is_list(1595)
^  Redo: (273) [user] mfix_vars1(1595, _458310)
^  Unify: (273) [user] mfix_vars1(1595, _458310)
   Call: (274) [system] string(1595)
^  Redo: (273) [user] mfix_vars1(1595, _458310)
^  Unify: (273) [user] mfix_vars1(1595, _458310)
   Call: (274) [system] compound(1595)
^  Redo: (273) [user] mfix_vars1(1595, _458310)
^  Unify: (273) [user] mfix_vars1(1595, _458310)
^  Call: (274) [user] symbol(1595)
^  Unify: (274) [user] symbol(1595)
   Call: (275) [system] atom(1595)
   Fail: (275) [system] atom(1595)
^  Fail: (274) [user] symbol(1595)
^  Redo: (273) [user] mfix_vars1(1595, _458310)
   Call: (274) [system] 1595=_458310
   Exit: (274) [system] 1595=1595
^  Exit: (273) [user] mfix_vars1(1595, 1595)
   Call: (273) [apply] apply:maplist_([0], _458312, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_492636|_492638], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _492636)
^  Unify: (274) [user] mfix_vars1(0, _492636)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _492636)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_497282))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _492636)
^  Unify: (274) [user] mfix_vars1(0, _492636)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _492636)
^  Unify: (274) [user] mfix_vars1(0, _492636)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _492636)
^  Unify: (274) [user] mfix_vars1(0, _492636)
   Call: (275) [system] 0==[_506562, _506568]
^  Redo: (274) [user] mfix_vars1(0, _492636)
^  Unify: (274) [user] mfix_vars1(0, _492636)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _492636)
^  Unify: (274) [user] mfix_vars1(0, _492636)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _492636)
^  Unify: (274) [user] mfix_vars1(0, _492636)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _492636)
^  Unify: (274) [user] mfix_vars1(0, _492636)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _492636)
   Call: (275) [system] 0=_492636
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6038, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1595, 0], [1595, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     \"#);", 1595, 0], [";;     \"#);", 1595, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     \"#);", 1595, 0], [";;     \"#);", 1595, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";;     \"#);", 1595, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT', [";;     \"#);", 1595, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0)))
   Call: (267) [system] '$COMMENT'(";;     \"#);", 1595, 0)\=@='$COMMENT'(";;     \"#);", 1595, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1595, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     \"#);", 1595, 0), _24674))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1595, 0), _24674))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1595, 0), _24674))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1595, 0), _24674))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1595, 0), _24674)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1595, 0), _24674)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     \"#);", 1595, 0), _30260))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     \"#);", 1595, 0), _30260))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     \"#);", 1595, 0), _30260)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     \"#);", 1595, 0), _30260)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     \"#);", 1595, 0), _30260)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0)))
   Call: (267) [system] '$COMMENT'(";;     \"#);", 1595, 0)\=@='$COMMENT'(";;     \"#);", 1595, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1595, 0), _24674)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     \"#);", 1595, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1595, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1595, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1595, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1595, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1595, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     \"#);", 1595, 0), _52580))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     \"#);", 1595, 0), _52580))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     \"#);", 1595, 0), _52580)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     \"#);", 1595, 0), _52580)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     \"#);", 1595, 0), _52580)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0)))
   Call: (267) [system] '$COMMENT'(";;     \"#);", 1595, 0)\=@='$COMMENT'(";;     \"#);", 1595, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1595, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0)))
   Call: (261) [system] '$COMMENT'(";;     \"#);", 1595, 0)\=@='$COMMENT'(";;     \"#);", 1595, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1595, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1595, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1595, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1595, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1595, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1595, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1595, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1595, 0), _81358, [], _81360)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     \"#);", 1595, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1595, 0), _81358, [], _81360)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1595, 0), _81358, [], _81360)
   Call: (258) [system] atom('$COMMENT'(";;     \"#);", 1595, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1595, 0), _81358, [], _81360)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1595, 0), _81358, [], _81360)
   Call: (258) [system] compound('$COMMENT'(";;     \"#);", 1595, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     \"#);", 1595, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1595, 0), _90674, _90676)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT', [";;     \"#);", 1595, 0])
^  Call: (258) [user] subst_vars([";;     \"#);", 1595, 0], _92560, [], _81360)
^  Unify: (258) [user] subst_vars([";;     \"#);", 1595, 0], [";;     \"#);", 1595, 0], [], [])
   Call: (259) [system] var([";;     \"#);", 1595, 0])
^  Redo: (258) [user] subst_vars([";;     \"#);", 1595, 0], _92560, [], _81360)
^  Unify: (258) [user] subst_vars([";;     \"#);", 1595, 0], [_96296|_96298], [], _81360)
^  Call: (259) [user] subst_vars(";;     \"#);", _96296, [], _97236)
^  Unify: (259) [user] subst_vars(";;     \"#);", ";;     \"#);", [], [])
   Call: (260) [system] var(";;     \"#);")
^  Redo: (259) [user] subst_vars(";;     \"#);", _96296, [], _97236)
^  Unify: (259) [user] subst_vars(";;     \"#);", _96296, [], _97236)
   Call: (260) [system] atom(";;     \"#);")
^  Redo: (259) [user] subst_vars(";;     \"#);", _96296, [], _97236)
^  Unify: (259) [user] subst_vars(";;     \"#);", _96296, [], _97236)
   Call: (260) [system] compound(";;     \"#);")
^  Redo: (259) [user] subst_vars(";;     \"#);", _96296, [], _97236)
^  Unify: (259) [user] subst_vars(";;     \"#);", ";;     \"#);", [], [])
^  Exit: (259) [user] subst_vars(";;     \"#);", ";;     \"#);", [], [])
^  Call: (259) [user] subst_vars([1595, 0], _96298, [], _81360)
^  Unify: (259) [user] subst_vars([1595, 0], [1595, 0], [], [])
   Call: (260) [system] var([1595, 0])
^  Redo: (259) [user] subst_vars([1595, 0], _96298, [], _81360)
^  Unify: (259) [user] subst_vars([1595, 0], [_112168|_112170], [], _81360)
^  Call: (260) [user] subst_vars(1595, _112168, [], _113108)
^  Unify: (260) [user] subst_vars(1595, 1595, [], [])
   Call: (261) [system] var(1595)
^  Redo: (260) [user] subst_vars(1595, _112168, [], _113108)
^  Unify: (260) [user] subst_vars(1595, _112168, [], _113108)
   Call: (261) [system] atom(1595)
^  Redo: (260) [user] subst_vars(1595, _112168, [], _113108)
^  Unify: (260) [user] subst_vars(1595, _112168, [], _113108)
   Call: (261) [system] compound(1595)
^  Redo: (260) [user] subst_vars(1595, _112168, [], _113108)
^  Unify: (260) [user] subst_vars(1595, 1595, [], [])
^  Exit: (260) [user] subst_vars(1595, 1595, [], [])
^  Call: (260) [user] subst_vars([0], _112170, [], _81360)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _112170, [], _81360)
^  Unify: (260) [user] subst_vars([0], [_128040|_128042], [], _81360)
^  Call: (261) [user] subst_vars(0, _128040, [], _128980)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _128040, [], _128980)
^  Unify: (261) [user] subst_vars(0, _128040, [], _128980)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _128040, [], _128980)
^  Unify: (261) [user] subst_vars(0, _128040, [], _128980)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _128040, [], _128980)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _128042, [], _81360)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _128042, [], _81360)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1595, 0], [1595, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     \"#);", 1595, 0], [";;     \"#);", 1595, 0], [], [])
   Call: (258) [system] compound_name_arguments(_81358, '$COMMENT', [";;     \"#);", 1595, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT', [";;     \"#);", 1595, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1595, 0), '$COMMENT'(";;     \"#);", 1595, 0), [], [])
   Call: (257) [system] _151398=metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1595, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1595, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1595, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1595, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1595, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1595, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1595, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1595, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1595, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1596, 0, 57315, '$COMMENT'(";;", 1596, 0), '$stream_position'(57315, 1596, 0, 57349)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1596, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1596, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1596, 0), _204114))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1596, 0), _204114))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1596, 0), _204114)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1596, 0), _204114)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1596, 0), _204114)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1596, 0), _204114)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1596, 0), _209726))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1596, 0), _209726))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1596, 0), _209726))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1596, 0), _209726))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1596, 0), _209726)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1596, 0), _209726)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1596, 0), _215312))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1596, 0), _215312))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1596, 0), _215312)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1596, 0), _215312)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1596, 0), _215312)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1596, 0), _215312)
   Call: (270) [system] var('$COMMENT'(";;", 1596, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1596, 0), _215312)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1596, 0), '$VAR'(_222772))
   Call: (270) [system] atom('$COMMENT'(";;", 1596, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1596, 0), _215312)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1596, 0), _215312)
   Call: (270) [system] '$COMMENT'(";;", 1596, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1596, 0), _215312)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1596, 0), _215312)
   Call: (270) [system] '$COMMENT'(";;", 1596, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1596, 0), _215312)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1596, 0), _215312)
   Call: (270) [system] '$COMMENT'(";;", 1596, 0)==[_232052, _232058]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1596, 0), _215312)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1596, 0), _215312)
   Call: (270) [system] is_list('$COMMENT'(";;", 1596, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1596, 0), _215312)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1596, 0), _215312)
   Call: (270) [system] string('$COMMENT'(";;", 1596, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1596, 0), _215312)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1596, 0), _215312)
   Call: (270) [system] compound('$COMMENT'(";;", 1596, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1596, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1596, 0), _242254, _242256)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1596, 0), '$COMMENT', [";;", 1596, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1596, 0], _245996)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1596, 0], _245996)
   Call: (271) [apply] apply:maplist_([";;", 1596, 0], _245996, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1596, 0], [_248814|_248816], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _248814)
^  Unify: (272) [user] mfix_vars1(";;", _248814)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _248814)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_253460))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _248814)
^  Unify: (272) [user] mfix_vars1(";;", _248814)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _248814)
^  Unify: (272) [user] mfix_vars1(";;", _248814)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _248814)
^  Unify: (272) [user] mfix_vars1(";;", _248814)
   Call: (273) [system] ";;"==[_262740, _262746]
^  Redo: (272) [user] mfix_vars1(";;", _248814)
^  Unify: (272) [user] mfix_vars1(";;", _248814)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _248814)
^  Unify: (272) [user] mfix_vars1(";;", _248814)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _248814)
^  Unify: (272) [user] mfix_vars1(";;", _248814)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _248814)
^  Unify: (272) [user] mfix_vars1(";;", _248814)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _248814)
   Call: (273) [system] ";;"=_248814
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1596, 0], _248816, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1596, 0], [_286812|_286814], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1596, _286812)
^  Unify: (273) [user] mfix_vars1(1596, _286812)
   Call: (274) [system] var(1596)
^  Redo: (273) [user] mfix_vars1(1596, _286812)
^  Unify: (273) [user] mfix_vars1(1596, '$VAR'(_291458))
   Call: (274) [system] atom(1596)
^  Redo: (273) [user] mfix_vars1(1596, _286812)
^  Unify: (273) [user] mfix_vars1(1596, _286812)
   Call: (274) [system] 1596==true
^  Redo: (273) [user] mfix_vars1(1596, _286812)
^  Unify: (273) [user] mfix_vars1(1596, _286812)
   Call: (274) [system] 1596==false
^  Redo: (273) [user] mfix_vars1(1596, _286812)
^  Unify: (273) [user] mfix_vars1(1596, _286812)
   Call: (274) [system] 1596==[_300738, _300744]
^  Redo: (273) [user] mfix_vars1(1596, _286812)
^  Unify: (273) [user] mfix_vars1(1596, _286812)
   Call: (274) [system] is_list(1596)
^  Redo: (273) [user] mfix_vars1(1596, _286812)
^  Unify: (273) [user] mfix_vars1(1596, _286812)
   Call: (274) [system] string(1596)
^  Redo: (273) [user] mfix_vars1(1596, _286812)
^  Unify: (273) [user] mfix_vars1(1596, _286812)
   Call: (274) [system] compound(1596)
^  Redo: (273) [user] mfix_vars1(1596, _286812)
^  Unify: (273) [user] mfix_vars1(1596, _286812)
^  Call: (274) [user] symbol(1596)
^  Unify: (274) [user] symbol(1596)
   Call: (275) [system] atom(1596)
   Fail: (275) [system] atom(1596)
^  Fail: (274) [user] symbol(1596)
^  Redo: (273) [user] mfix_vars1(1596, _286812)
   Call: (274) [system] 1596=_286812
   Exit: (274) [system] 1596=1596
^  Exit: (273) [user] mfix_vars1(1596, 1596)
   Call: (273) [apply] apply:maplist_([0], _286814, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_321138|_321140], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _321138)
^  Unify: (274) [user] mfix_vars1(0, _321138)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _321138)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_325784))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _321138)
^  Unify: (274) [user] mfix_vars1(0, _321138)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _321138)
^  Unify: (274) [user] mfix_vars1(0, _321138)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _321138)
^  Unify: (274) [user] mfix_vars1(0, _321138)
   Call: (275) [system] 0==[_335064, _335070]
^  Redo: (274) [user] mfix_vars1(0, _321138)
^  Unify: (274) [user] mfix_vars1(0, _321138)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _321138)
^  Unify: (274) [user] mfix_vars1(0, _321138)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _321138)
^  Unify: (274) [user] mfix_vars1(0, _321138)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _321138)
^  Unify: (274) [user] mfix_vars1(0, _321138)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _321138)
   Call: (275) [system] 0=_321138
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _321140, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1596, 0], [1596, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1596, 0], [";;", 1596, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1596, 0], [";;", 1596, 0])
   Call: (270) [system] compound_name_arguments(_215312, '$COMMENT', [";;", 1596, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1596, 0), '$COMMENT', [";;", 1596, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1596, 0)\=@='$COMMENT'(";;", 1596, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1596, 0), _209726)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1596, 0), _371312))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1596, 0), _371312))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1596, 0), _371312))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1596, 0), _371312))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1596, 0), _371312)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1596, 0), _371312)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1596, 0), _376898))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1596, 0), _376898))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1596, 0), _376898)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1596, 0), _376898)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1596, 0), _376898)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1596, 0)\=@='$COMMENT'(";;", 1596, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1596, 0), _371312)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1596, 0), _204114))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1596, 0), _204114))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1596, 0), _204114))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1596, 0), _204114))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1596, 0), _204114)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1596, 0), _204114)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1596, 0), _399218))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1596, 0), _399218))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1596, 0), _399218)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1596, 0), _399218)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1596, 0), _399218)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1596, 0)\=@='$COMMENT'(";;", 1596, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1596, 0), _204114)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1596, 0)\=@='$COMMENT'(";;", 1596, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1596, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1596, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1596, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1596, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1596, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1596, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1596, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1596, 0), _427996, [], _427998)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1596, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1596, 0), _427996, [], _427998)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1596, 0), _427996, [], _427998)
   Call: (258) [system] atom('$COMMENT'(";;", 1596, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1596, 0), _427996, [], _427998)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1596, 0), _427996, [], _427998)
   Call: (258) [system] compound('$COMMENT'(";;", 1596, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1596, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1596, 0), _437312, _437314)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1596, 0), '$COMMENT', [";;", 1596, 0])
^  Call: (258) [user] subst_vars([";;", 1596, 0], _439198, [], _427998)
^  Unify: (258) [user] subst_vars([";;", 1596, 0], [";;", 1596, 0], [], [])
   Call: (259) [system] var([";;", 1596, 0])
^  Redo: (258) [user] subst_vars([";;", 1596, 0], _439198, [], _427998)
^  Unify: (258) [user] subst_vars([";;", 1596, 0], [_442934|_442936], [], _427998)
^  Call: (259) [user] subst_vars(";;", _442934, [], _443874)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _442934, [], _443874)
^  Unify: (259) [user] subst_vars(";;", _442934, [], _443874)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _442934, [], _443874)
^  Unify: (259) [user] subst_vars(";;", _442934, [], _443874)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _442934, [], _443874)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1596, 0], _442936, [], _427998)
^  Unify: (259) [user] subst_vars([1596, 0], [1596, 0], [], [])
   Call: (260) [system] var([1596, 0])
^  Redo: (259) [user] subst_vars([1596, 0], _442936, [], _427998)
^  Unify: (259) [user] subst_vars([1596, 0], [_458806|_458808], [], _427998)
^  Call: (260) [user] subst_vars(1596, _458806, [], _459746)
^  Unify: (260) [user] subst_vars(1596, 1596, [], [])
   Call: (261) [system] var(1596)
^  Redo: (260) [user] subst_vars(1596, _458806, [], _459746)
^  Unify: (260) [user] subst_vars(1596, _458806, [], _459746)
   Call: (261) [system] atom(1596)
^  Redo: (260) [user] subst_vars(1596, _458806, [], _459746)
^  Unify: (260) [user] subst_vars(1596, _458806, [], _459746)
   Call: (261) [system] compound(1596)
^  Redo: (260) [user] subst_vars(1596, _458806, [], _459746)
^  Unify: (260) [user] subst_vars(1596, 1596, [], [])
^  Exit: (260) [user] subst_vars(1596, 1596, [], [])
^  Call: (260) [user] subst_vars([0], _458808, [], _427998)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _458808, [], _427998)
^  Unify: (260) [user] subst_vars([0], [_474678|_474680], [], _427998)
^  Call: (261) [user] subst_vars(0, _474678, [], _475618)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _474678, [], _475618)
^  Unify: (261) [user] subst_vars(0, _474678, [], _475618)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _474678, [], _475618)
^  Unify: (261) [user] subst_vars(0, _474678, [], _475618)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _474678, [], _475618)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _474680, [], _427998)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _474680, [], _427998)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1596, 0], [1596, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1596, 0], [";;", 1596, 0], [], [])
   Call: (258) [system] compound_name_arguments(_427996, '$COMMENT', [";;", 1596, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1596, 0), '$COMMENT', [";;", 1596, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1596, 0), '$COMMENT'(";;", 1596, 0), [], [])
   Call: (257) [system] _498036=metta_file_buffer(+, '$COMMENT'(";;", 1596, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1596, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1596, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1596, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1596, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1596, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1596, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1596, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1596, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1597, 0, 57318, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$stream_position'(57318, 1597, 0, 57352)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _33652))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _33652))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _33652)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _33652)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _33652)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _33652)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _39264))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _39264))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _39264))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _39264))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _39264)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _39264)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _44850))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _44850))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _44850)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _44850)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _44850)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _44850)
   Call: (270) [system] var('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _44850)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$VAR'(_52310))
   Call: (270) [system] atom('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _44850)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _44850)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _44850)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _44850)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _44850)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _44850)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0)==[_61590, _61596]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _44850)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _44850)
   Call: (270) [system] is_list('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _44850)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _44850)
   Call: (270) [system] string('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _44850)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _44850)
   Call: (270) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _71792, _71794)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0], _75534)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0], _75534)
   Call: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0], _75534, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0], [_78352|_78354], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _78352)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _78352)
   Call: (273) [system] var(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _78352)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", '$VAR'(_82998))
   Call: (273) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _78352)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _78352)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["==true
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _78352)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _78352)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["==false
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _78352)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _78352)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["==[_92278, _92284]
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _78352)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _78352)
   Call: (273) [system] is_list(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _78352)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _78352)
   Call: (273) [system] string(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Exit: (273) [system] string(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _78352)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _78352)
   Call: (273) [system] compound(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _78352)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _78352)
^  Call: (273) [user] symbol(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Unify: (273) [user] symbol(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Call: (274) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Fail: (274) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Fail: (273) [user] symbol(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _78352)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["=_78352
   Exit: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["=";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["
^  Exit: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Call: (272) [apply] apply:maplist_([1597, 0], _78354, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1597, 0], [_116350|_116352], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1597, _116350)
^  Unify: (273) [user] mfix_vars1(1597, _116350)
   Call: (274) [system] var(1597)
^  Redo: (273) [user] mfix_vars1(1597, _116350)
^  Unify: (273) [user] mfix_vars1(1597, '$VAR'(_120996))
   Call: (274) [system] atom(1597)
^  Redo: (273) [user] mfix_vars1(1597, _116350)
^  Unify: (273) [user] mfix_vars1(1597, _116350)
   Call: (274) [system] 1597==true
^  Redo: (273) [user] mfix_vars1(1597, _116350)
^  Unify: (273) [user] mfix_vars1(1597, _116350)
   Call: (274) [system] 1597==false
^  Redo: (273) [user] mfix_vars1(1597, _116350)
^  Unify: (273) [user] mfix_vars1(1597, _116350)
   Call: (274) [system] 1597==[_130276, _130282]
^  Redo: (273) [user] mfix_vars1(1597, _116350)
^  Unify: (273) [user] mfix_vars1(1597, _116350)
   Call: (274) [system] is_list(1597)
^  Redo: (273) [user] mfix_vars1(1597, _116350)
^  Unify: (273) [user] mfix_vars1(1597, _116350)
   Call: (274) [system] string(1597)
^  Redo: (273) [user] mfix_vars1(1597, _116350)
^  Unify: (273) [user] mfix_vars1(1597, _116350)
   Call: (274) [system] compound(1597)
^  Redo: (273) [user] mfix_vars1(1597, _116350)
^  Unify: (273) [user] mfix_vars1(1597, _116350)
^  Call: (274) [user] symbol(1597)
^  Unify: (274) [user] symbol(1597)
   Call: (275) [system] atom(1597)
   Fail: (275) [system] atom(1597)
^  Fail: (274) [user] symbol(1597)
^  Redo: (273) [user] mfix_vars1(1597, _116350)
   Call: (274) [system] 1597=_116350
   Exit: (274) [system] 1597=1597
^  Exit: (273) [user] mfix_vars1(1597, 1597)
   Call: (273) [apply] apply:maplist_([0], _116352, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_150676|_150678], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _150676)
^  Unify: (274) [user] mfix_vars1(0, _150676)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _150676)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_155322))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _150676)
^  Unify: (274) [user] mfix_vars1(0, _150676)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _150676)
^  Unify: (274) [user] mfix_vars1(0, _150676)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _150676)
^  Unify: (274) [user] mfix_vars1(0, _150676)
   Call: (275) [system] 0==[_164602, _164608]
^  Redo: (274) [user] mfix_vars1(0, _150676)
^  Unify: (274) [user] mfix_vars1(0, _150676)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _150676)
^  Unify: (274) [user] mfix_vars1(0, _150676)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _150676)
^  Unify: (274) [user] mfix_vars1(0, _150676)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _150676)
^  Unify: (274) [user] mfix_vars1(0, _150676)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _150676)
   Call: (275) [system] 0=_150676
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _150678, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1597, 0], [1597, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0])
   Call: (270) [system] compound_name_arguments(_44850, '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _39264)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _200850))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _200850))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _200850))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _200850))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _200850)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _200850)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _206436))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _206436))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _206436)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _206436)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _206436)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _200850)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _33652))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _33652))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _33652))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _33652))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _33652)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _33652)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _228756))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _228756))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _228756)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _228756)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _228756)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _33652)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0)))
   Call: (261) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _257534, [], _257536)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _257534, [], _257536)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _257534, [], _257536)
   Call: (258) [system] atom('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _257534, [], _257536)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _257534, [], _257536)
   Call: (258) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), _266850, _266852)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0])
^  Call: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0], _268736, [], _257536)
^  Unify: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0], [], [])
   Call: (259) [system] var([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0])
^  Redo: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0], _268736, [], _257536)
^  Unify: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0], [_272472|_272474], [], _257536)
^  Call: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _272472, [], _273412)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", [], [])
   Call: (260) [system] var(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _272472, [], _273412)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _272472, [], _273412)
   Call: (260) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _272472, [], _273412)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _272472, [], _273412)
   Call: (260) [system] compound(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _272472, [], _273412)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", [], [])
^  Exit: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", [], [])
^  Call: (259) [user] subst_vars([1597, 0], _272474, [], _257536)
^  Unify: (259) [user] subst_vars([1597, 0], [1597, 0], [], [])
   Call: (260) [system] var([1597, 0])
^  Redo: (259) [user] subst_vars([1597, 0], _272474, [], _257536)
^  Unify: (259) [user] subst_vars([1597, 0], [_288344|_288346], [], _257536)
^  Call: (260) [user] subst_vars(1597, _288344, [], _289284)
^  Unify: (260) [user] subst_vars(1597, 1597, [], [])
   Call: (261) [system] var(1597)
^  Redo: (260) [user] subst_vars(1597, _288344, [], _289284)
^  Unify: (260) [user] subst_vars(1597, _288344, [], _289284)
   Call: (261) [system] atom(1597)
^  Redo: (260) [user] subst_vars(1597, _288344, [], _289284)
^  Unify: (260) [user] subst_vars(1597, _288344, [], _289284)
   Call: (261) [system] compound(1597)
^  Redo: (260) [user] subst_vars(1597, _288344, [], _289284)
^  Unify: (260) [user] subst_vars(1597, 1597, [], [])
^  Exit: (260) [user] subst_vars(1597, 1597, [], [])
^  Call: (260) [user] subst_vars([0], _288346, [], _257536)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _288346, [], _257536)
^  Unify: (260) [user] subst_vars([0], [_304216|_304218], [], _257536)
^  Call: (261) [user] subst_vars(0, _304216, [], _305156)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _304216, [], _305156)
^  Unify: (261) [user] subst_vars(0, _304216, [], _305156)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _304216, [], _305156)
^  Unify: (261) [user] subst_vars(0, _304216, [], _305156)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _304216, [], _305156)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _304218, [], _257536)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _304218, [], _257536)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1597, 0], [1597, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0], [], [])
   Call: (258) [system] compound_name_arguments(_257534, '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), [], [])
   Call: (257) [system] _327574=metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1597, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1598, 0, 57378, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$stream_position'(57378, 1598, 0, 57412)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _380298))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _380298))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _380298)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _380298)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _380298)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _380298)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _385910))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _385910))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _385910))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _385910))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _385910)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _385910)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _391496))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _391496))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _391496)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _391496)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _391496)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _391496)
   Call: (270) [system] var('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _391496)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$VAR'(_398956))
   Call: (270) [system] atom('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _391496)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _391496)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _391496)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _391496)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _391496)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _391496)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0)==[_408236, _408242]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _391496)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _391496)
   Call: (270) [system] is_list('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _391496)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _391496)
   Call: (270) [system] string('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _391496)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _391496)
   Call: (270) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _418438, _418440)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1598, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         vec![expr!(\"@doc-formal\"", 1598, 0], _422180)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         vec![expr!(\"@doc-formal\"", 1598, 0], _422180)
   Call: (271) [apply] apply:maplist_([";;         vec![expr!(\"@doc-formal\"", 1598, 0], _422180, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         vec![expr!(\"@doc-formal\"", 1598, 0], [_424998|_425000], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _424998)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _424998)
   Call: (273) [system] var(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _424998)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", '$VAR'(_429644))
   Call: (273) [system] atom(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _424998)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _424998)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""==true
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _424998)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _424998)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""==false
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _424998)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _424998)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""==[_438924, _438930]
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _424998)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _424998)
   Call: (273) [system] is_list(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _424998)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _424998)
   Call: (273) [system] string(";;         vec![expr!(\"@doc-formal\"")
   Exit: (273) [system] string(";;         vec![expr!(\"@doc-formal\"")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _424998)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _424998)
   Call: (273) [system] compound(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _424998)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _424998)
^  Call: (273) [user] symbol(";;         vec![expr!(\"@doc-formal\"")
^  Unify: (273) [user] symbol(";;         vec![expr!(\"@doc-formal\"")
   Call: (274) [system] atom(";;         vec![expr!(\"@doc-formal\"")
   Fail: (274) [system] atom(";;         vec![expr!(\"@doc-formal\"")
^  Fail: (273) [user] symbol(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _424998)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""=_424998
   Exit: (273) [system] ";;         vec![expr!(\"@doc-formal\""=";;         vec![expr!(\"@doc-formal\""
^  Exit: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"")
   Call: (272) [apply] apply:maplist_([1598, 0], _425000, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1598, 0], [_462996|_462998], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1598, _462996)
^  Unify: (273) [user] mfix_vars1(1598, _462996)
   Call: (274) [system] var(1598)
^  Redo: (273) [user] mfix_vars1(1598, _462996)
^  Unify: (273) [user] mfix_vars1(1598, '$VAR'(_467642))
   Call: (274) [system] atom(1598)
^  Redo: (273) [user] mfix_vars1(1598, _462996)
^  Unify: (273) [user] mfix_vars1(1598, _462996)
   Call: (274) [system] 1598==true
^  Redo: (273) [user] mfix_vars1(1598, _462996)
^  Unify: (273) [user] mfix_vars1(1598, _462996)
   Call: (274) [system] 1598==false
^  Redo: (273) [user] mfix_vars1(1598, _462996)
^  Unify: (273) [user] mfix_vars1(1598, _462996)
   Call: (274) [system] 1598==[_476922, _476928]
^  Redo: (273) [user] mfix_vars1(1598, _462996)
^  Unify: (273) [user] mfix_vars1(1598, _462996)
   Call: (274) [system] is_list(1598)
^  Redo: (273) [user] mfix_vars1(1598, _462996)
^  Unify: (273) [user] mfix_vars1(1598, _462996)
   Call: (274) [system] string(1598)
^  Redo: (273) [user] mfix_vars1(1598, _462996)
^  Unify: (273) [user] mfix_vars1(1598, _462996)
   Call: (274) [system] compound(1598)
^  Redo: (273) [user] mfix_vars1(1598, _462996)
^  Unify: (273) [user] mfix_vars1(1598, _462996)
^  Call: (274) [user] symbol(1598)
^  Unify: (274) [user] symbol(1598)
   Call: (275) [system] atom(1598)
   Fail: (275) [system] atom(1598)
^  Fail: (274) [user] symbol(1598)
^  Redo: (273) [user] mfix_vars1(1598, _462996)
   Call: (274) [system] 1598=_462996
   Exit: (274) [system] 1598=1598
^  Exit: (273) [user] mfix_vars1(1598, 1598)
   Call: (273) [apply] apply:maplist_([0], _462998, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_497322|_497324], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _497322)
^  Unify: (274) [user] mfix_vars1(0, _497322)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _497322)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_501968))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _497322)
^  Unify: (274) [user] mfix_vars1(0, _497322)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _497322)
^  Unify: (274) [user] mfix_vars1(0, _497322)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _497322)
^  Unify: (274) [user] mfix_vars1(0, _497322)
   Call: (275) [system] 0==[_511248, _511254]
^  Redo: (274) [user] mfix_vars1(0, _497322)
^  Unify: (274) [user] mfix_vars1(0, _497322)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _497322)
^  Unify: (274) [user] mfix_vars1(0, _497322)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _497322)
^  Unify: (274) [user] mfix_vars1(0, _497322)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _497322)
^  Unify: (274) [user] mfix_vars1(0, _497322)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6042)
   Call: (275) [system] 0=_6042
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6044, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1598, 0], [1598, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         vec![expr!(\"@doc-formal\"", 1598, 0], [";;         vec![expr!(\"@doc-formal\"", 1598, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         vec![expr!(\"@doc-formal\"", 1598, 0], [";;         vec![expr!(\"@doc-formal\"", 1598, 0])
   Call: (270) [system] compound_name_arguments(_5984, '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1598, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1598, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _5970)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _29662))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _29662))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _29662))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _29662))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _29662)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _29662)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _35248))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _35248))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _35248)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _35248)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _35248)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _29662)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _57568))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _57568))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _57568)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _57568)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _57568)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0)))
   Call: (261) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _86346, [], _86348)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _86346, [], _86348)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _86346, [], _86348)
   Call: (258) [system] atom('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _86346, [], _86348)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _86346, [], _86348)
   Call: (258) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), _95662, _95664)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1598, 0])
^  Call: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1598, 0], _97548, [], _86348)
^  Unify: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1598, 0], [";;         vec![expr!(\"@doc-formal\"", 1598, 0], [], [])
   Call: (259) [system] var([";;         vec![expr!(\"@doc-formal\"", 1598, 0])
^  Redo: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1598, 0], _97548, [], _86348)
^  Unify: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1598, 0], [_101284|_101286], [], _86348)
^  Call: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _101284, [], _102224)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"", [], [])
   Call: (260) [system] var(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _101284, [], _102224)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _101284, [], _102224)
   Call: (260) [system] atom(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _101284, [], _102224)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _101284, [], _102224)
   Call: (260) [system] compound(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _101284, [], _102224)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"", [], [])
^  Exit: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"", [], [])
^  Call: (259) [user] subst_vars([1598, 0], _101286, [], _86348)
^  Unify: (259) [user] subst_vars([1598, 0], [1598, 0], [], [])
   Call: (260) [system] var([1598, 0])
^  Redo: (259) [user] subst_vars([1598, 0], _101286, [], _86348)
^  Unify: (259) [user] subst_vars([1598, 0], [_117156|_117158], [], _86348)
^  Call: (260) [user] subst_vars(1598, _117156, [], _118096)
^  Unify: (260) [user] subst_vars(1598, 1598, [], [])
   Call: (261) [system] var(1598)
^  Redo: (260) [user] subst_vars(1598, _117156, [], _118096)
^  Unify: (260) [user] subst_vars(1598, _117156, [], _118096)
   Call: (261) [system] atom(1598)
^  Redo: (260) [user] subst_vars(1598, _117156, [], _118096)
^  Unify: (260) [user] subst_vars(1598, _117156, [], _118096)
   Call: (261) [system] compound(1598)
^  Redo: (260) [user] subst_vars(1598, _117156, [], _118096)
^  Unify: (260) [user] subst_vars(1598, 1598, [], [])
^  Exit: (260) [user] subst_vars(1598, 1598, [], [])
^  Call: (260) [user] subst_vars([0], _117158, [], _86348)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _117158, [], _86348)
^  Unify: (260) [user] subst_vars([0], [_133028|_133030], [], _86348)
^  Call: (261) [user] subst_vars(0, _133028, [], _133968)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _133028, [], _133968)
^  Unify: (261) [user] subst_vars(0, _133028, [], _133968)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _133028, [], _133968)
^  Unify: (261) [user] subst_vars(0, _133028, [], _133968)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _133028, [], _133968)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _133030, [], _86348)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _133030, [], _86348)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1598, 0], [1598, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1598, 0], [";;         vec![expr!(\"@doc-formal\"", 1598, 0], [], [])
   Call: (258) [system] compound_name_arguments(_86346, '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1598, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1598, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), [], [])
   Call: (257) [system] _156386=metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1598, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1599, 0, 57414, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$stream_position'(57414, 1599, 0, 57448)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _209110))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _209110))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _209110)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _209110)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _209110)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _209110)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _214722))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _214722))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _214722))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _214722))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _214722)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _214722)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _220308))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _220308))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _220308)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _220308)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _220308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _220308)
   Call: (270) [system] var('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _220308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$VAR'(_227768))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _220308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _220308)
   Call: (270) [system] '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _220308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _220308)
   Call: (270) [system] '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _220308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _220308)
   Call: (270) [system] '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0)==[_237048, _237054]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _220308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _220308)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _220308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _220308)
   Call: (270) [system] string('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _220308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _220308)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _247250, _247252)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT', [";;             (\"@item\" \"SomeAtom\")", 1599, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@item\" \"SomeAtom\")", 1599, 0], _250992)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@item\" \"SomeAtom\")", 1599, 0], _250992)
   Call: (271) [apply] apply:maplist_([";;             (\"@item\" \"SomeAtom\")", 1599, 0], _250992, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@item\" \"SomeAtom\")", 1599, 0], [_253810|_253812], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@item\" \"SomeAtom\")", _253810)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"SomeAtom\")", _253810)
   Call: (273) [system] var(";;             (\"@item\" \"SomeAtom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"SomeAtom\")", _253810)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"SomeAtom\")", '$VAR'(_258456))
   Call: (273) [system] atom(";;             (\"@item\" \"SomeAtom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"SomeAtom\")", _253810)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"SomeAtom\")", _253810)
   Call: (273) [system] ";;             (\"@item\" \"SomeAtom\")"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"SomeAtom\")", _253810)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"SomeAtom\")", _253810)
   Call: (273) [system] ";;             (\"@item\" \"SomeAtom\")"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"SomeAtom\")", _253810)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"SomeAtom\")", _253810)
   Call: (273) [system] ";;             (\"@item\" \"SomeAtom\")"==[_267736, _267742]
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"SomeAtom\")", _253810)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"SomeAtom\")", _253810)
   Call: (273) [system] is_list(";;             (\"@item\" \"SomeAtom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"SomeAtom\")", _253810)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"SomeAtom\")", _253810)
   Call: (273) [system] string(";;             (\"@item\" \"SomeAtom\")")
   Exit: (273) [system] string(";;             (\"@item\" \"SomeAtom\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"SomeAtom\")", _253810)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"SomeAtom\")", _253810)
   Call: (273) [system] compound(";;             (\"@item\" \"SomeAtom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"SomeAtom\")", _253810)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"SomeAtom\")", _253810)
^  Call: (273) [user] symbol(";;             (\"@item\" \"SomeAtom\")")
^  Unify: (273) [user] symbol(";;             (\"@item\" \"SomeAtom\")")
   Call: (274) [system] atom(";;             (\"@item\" \"SomeAtom\")")
   Fail: (274) [system] atom(";;             (\"@item\" \"SomeAtom\")")
^  Fail: (273) [user] symbol(";;             (\"@item\" \"SomeAtom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"SomeAtom\")", _253810)
   Call: (273) [system] ";;             (\"@item\" \"SomeAtom\")"=_253810
   Exit: (273) [system] ";;             (\"@item\" \"SomeAtom\")"=";;             (\"@item\" \"SomeAtom\")"
^  Exit: (272) [user] mfix_vars1(";;             (\"@item\" \"SomeAtom\")", ";;             (\"@item\" \"SomeAtom\")")
   Call: (272) [apply] apply:maplist_([1599, 0], _253812, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1599, 0], [_291808|_291810], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1599, _291808)
^  Unify: (273) [user] mfix_vars1(1599, _291808)
   Call: (274) [system] var(1599)
^  Redo: (273) [user] mfix_vars1(1599, _291808)
^  Unify: (273) [user] mfix_vars1(1599, '$VAR'(_296454))
   Call: (274) [system] atom(1599)
^  Redo: (273) [user] mfix_vars1(1599, _291808)
^  Unify: (273) [user] mfix_vars1(1599, _291808)
   Call: (274) [system] 1599==true
^  Redo: (273) [user] mfix_vars1(1599, _291808)
^  Unify: (273) [user] mfix_vars1(1599, _291808)
   Call: (274) [system] 1599==false
^  Redo: (273) [user] mfix_vars1(1599, _291808)
^  Unify: (273) [user] mfix_vars1(1599, _291808)
   Call: (274) [system] 1599==[_305734, _305740]
^  Redo: (273) [user] mfix_vars1(1599, _291808)
^  Unify: (273) [user] mfix_vars1(1599, _291808)
   Call: (274) [system] is_list(1599)
^  Redo: (273) [user] mfix_vars1(1599, _291808)
^  Unify: (273) [user] mfix_vars1(1599, _291808)
   Call: (274) [system] string(1599)
^  Redo: (273) [user] mfix_vars1(1599, _291808)
^  Unify: (273) [user] mfix_vars1(1599, _291808)
   Call: (274) [system] compound(1599)
^  Redo: (273) [user] mfix_vars1(1599, _291808)
^  Unify: (273) [user] mfix_vars1(1599, _291808)
^  Call: (274) [user] symbol(1599)
^  Unify: (274) [user] symbol(1599)
   Call: (275) [system] atom(1599)
   Fail: (275) [system] atom(1599)
^  Fail: (274) [user] symbol(1599)
^  Redo: (273) [user] mfix_vars1(1599, _291808)
   Call: (274) [system] 1599=_291808
   Exit: (274) [system] 1599=1599
^  Exit: (273) [user] mfix_vars1(1599, 1599)
   Call: (273) [apply] apply:maplist_([0], _291810, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_326134|_326136], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _326134)
^  Unify: (274) [user] mfix_vars1(0, _326134)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _326134)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_330780))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _326134)
^  Unify: (274) [user] mfix_vars1(0, _326134)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _326134)
^  Unify: (274) [user] mfix_vars1(0, _326134)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _326134)
^  Unify: (274) [user] mfix_vars1(0, _326134)
   Call: (275) [system] 0==[_340060, _340066]
^  Redo: (274) [user] mfix_vars1(0, _326134)
^  Unify: (274) [user] mfix_vars1(0, _326134)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _326134)
^  Unify: (274) [user] mfix_vars1(0, _326134)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _326134)
^  Unify: (274) [user] mfix_vars1(0, _326134)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _326134)
^  Unify: (274) [user] mfix_vars1(0, _326134)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _326134)
   Call: (275) [system] 0=_326134
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _326136, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1599, 0], [1599, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@item\" \"SomeAtom\")", 1599, 0], [";;             (\"@item\" \"SomeAtom\")", 1599, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@item\" \"SomeAtom\")", 1599, 0], [";;             (\"@item\" \"SomeAtom\")", 1599, 0])
   Call: (270) [system] compound_name_arguments(_220308, '$COMMENT', [";;             (\"@item\" \"SomeAtom\")", 1599, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT', [";;             (\"@item\" \"SomeAtom\")", 1599, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0)\=@='$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _214722)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _376308))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _376308))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _376308))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _376308))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _376308)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _376308)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _381894))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _381894))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _381894)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _381894)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _381894)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0)\=@='$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _376308)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _209110))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _209110))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _209110))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _209110))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _209110)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _209110)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _404214))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _404214))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _404214)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _404214)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _404214)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0)\=@='$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _209110)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0)\=@='$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _432992, [], _432994)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _432992, [], _432994)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _432992, [], _432994)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _432992, [], _432994)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _432992, [], _432994)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), _442308, _442310)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT', [";;             (\"@item\" \"SomeAtom\")", 1599, 0])
^  Call: (258) [user] subst_vars([";;             (\"@item\" \"SomeAtom\")", 1599, 0], _444194, [], _432994)
^  Unify: (258) [user] subst_vars([";;             (\"@item\" \"SomeAtom\")", 1599, 0], [";;             (\"@item\" \"SomeAtom\")", 1599, 0], [], [])
   Call: (259) [system] var([";;             (\"@item\" \"SomeAtom\")", 1599, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@item\" \"SomeAtom\")", 1599, 0], _444194, [], _432994)
^  Unify: (258) [user] subst_vars([";;             (\"@item\" \"SomeAtom\")", 1599, 0], [_447930|_447932], [], _432994)
^  Call: (259) [user] subst_vars(";;             (\"@item\" \"SomeAtom\")", _447930, [], _448870)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" \"SomeAtom\")", ";;             (\"@item\" \"SomeAtom\")", [], [])
   Call: (260) [system] var(";;             (\"@item\" \"SomeAtom\")")
^  Redo: (259) [user] subst_vars(";;             (\"@item\" \"SomeAtom\")", _447930, [], _448870)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" \"SomeAtom\")", _447930, [], _448870)
   Call: (260) [system] atom(";;             (\"@item\" \"SomeAtom\")")
^  Redo: (259) [user] subst_vars(";;             (\"@item\" \"SomeAtom\")", _447930, [], _448870)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" \"SomeAtom\")", _447930, [], _448870)
   Call: (260) [system] compound(";;             (\"@item\" \"SomeAtom\")")
^  Redo: (259) [user] subst_vars(";;             (\"@item\" \"SomeAtom\")", _447930, [], _448870)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" \"SomeAtom\")", ";;             (\"@item\" \"SomeAtom\")", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@item\" \"SomeAtom\")", ";;             (\"@item\" \"SomeAtom\")", [], [])
^  Call: (259) [user] subst_vars([1599, 0], _447932, [], _432994)
^  Unify: (259) [user] subst_vars([1599, 0], [1599, 0], [], [])
   Call: (260) [system] var([1599, 0])
^  Redo: (259) [user] subst_vars([1599, 0], _447932, [], _432994)
^  Unify: (259) [user] subst_vars([1599, 0], [_463802|_463804], [], _432994)
^  Call: (260) [user] subst_vars(1599, _463802, [], _464742)
^  Unify: (260) [user] subst_vars(1599, 1599, [], [])
   Call: (261) [system] var(1599)
^  Redo: (260) [user] subst_vars(1599, _463802, [], _464742)
^  Unify: (260) [user] subst_vars(1599, _463802, [], _464742)
   Call: (261) [system] atom(1599)
^  Redo: (260) [user] subst_vars(1599, _463802, [], _464742)
^  Unify: (260) [user] subst_vars(1599, _463802, [], _464742)
   Call: (261) [system] compound(1599)
^  Redo: (260) [user] subst_vars(1599, _463802, [], _464742)
^  Unify: (260) [user] subst_vars(1599, 1599, [], [])
^  Exit: (260) [user] subst_vars(1599, 1599, [], [])
^  Call: (260) [user] subst_vars([0], _463804, [], _432994)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _463804, [], _432994)
^  Unify: (260) [user] subst_vars([0], [_479674|_479676], [], _432994)
^  Call: (261) [user] subst_vars(0, _479674, [], _480614)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _479674, [], _480614)
^  Unify: (261) [user] subst_vars(0, _479674, [], _480614)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _479674, [], _480614)
^  Unify: (261) [user] subst_vars(0, _479674, [], _480614)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _479674, [], _480614)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _479676, [], _432994)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _479676, [], _432994)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1599, 0], [1599, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@item\" \"SomeAtom\")", 1599, 0], [";;             (\"@item\" \"SomeAtom\")", 1599, 0], [], [])
   Call: (258) [system] compound_name_arguments(_432992, '$COMMENT', [";;             (\"@item\" \"SomeAtom\")", 1599, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT', [";;             (\"@item\" \"SomeAtom\")", 1599, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), [], [])
   Call: (257) [system] _503032=metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"SomeAtom\")", 1599, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1600, 0, 57450, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$stream_position'(57450, 1600, 0, 57484)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _38504))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _38504))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _38504)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _38504)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _38504)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _38504)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _44116))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _44116))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _44116))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _44116))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _44116)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _44116)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _49702))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _49702))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _49702)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _49702)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _49702)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _49702)
   Call: (270) [system] var('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _49702)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$VAR'(_57162))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _49702)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _49702)
   Call: (270) [system] '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _49702)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _49702)
   Call: (270) [system] '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _49702)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _49702)
   Call: (270) [system] '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0)==[_66442, _66448]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _49702)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _49702)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _49702)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _49702)
   Call: (270) [system] string('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _49702)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _49702)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _76644, _76646)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT', [";;             (\"@kind\" \"atom\")", 1600, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@kind\" \"atom\")", 1600, 0], _80386)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@kind\" \"atom\")", 1600, 0], _80386)
   Call: (271) [apply] apply:maplist_([";;             (\"@kind\" \"atom\")", 1600, 0], _80386, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@kind\" \"atom\")", 1600, 0], [_83204|_83206], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _83204)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _83204)
   Call: (273) [system] var(";;             (\"@kind\" \"atom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _83204)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", '$VAR'(_87850))
   Call: (273) [system] atom(";;             (\"@kind\" \"atom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _83204)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _83204)
   Call: (273) [system] ";;             (\"@kind\" \"atom\")"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _83204)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _83204)
   Call: (273) [system] ";;             (\"@kind\" \"atom\")"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _83204)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _83204)
   Call: (273) [system] ";;             (\"@kind\" \"atom\")"==[_97130, _97136]
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _83204)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _83204)
   Call: (273) [system] is_list(";;             (\"@kind\" \"atom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _83204)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _83204)
   Call: (273) [system] string(";;             (\"@kind\" \"atom\")")
   Exit: (273) [system] string(";;             (\"@kind\" \"atom\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _83204)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _83204)
   Call: (273) [system] compound(";;             (\"@kind\" \"atom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _83204)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _83204)
^  Call: (273) [user] symbol(";;             (\"@kind\" \"atom\")")
^  Unify: (273) [user] symbol(";;             (\"@kind\" \"atom\")")
   Call: (274) [system] atom(";;             (\"@kind\" \"atom\")")
   Fail: (274) [system] atom(";;             (\"@kind\" \"atom\")")
^  Fail: (273) [user] symbol(";;             (\"@kind\" \"atom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _83204)
   Call: (273) [system] ";;             (\"@kind\" \"atom\")"=_83204
   Exit: (273) [system] ";;             (\"@kind\" \"atom\")"=";;             (\"@kind\" \"atom\")"
^  Exit: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", ";;             (\"@kind\" \"atom\")")
   Call: (272) [apply] apply:maplist_([1600, 0], _83206, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1600, 0], [_121202|_121204], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1600, _121202)
^  Unify: (273) [user] mfix_vars1(1600, _121202)
   Call: (274) [system] var(1600)
^  Redo: (273) [user] mfix_vars1(1600, _121202)
^  Unify: (273) [user] mfix_vars1(1600, '$VAR'(_125848))
   Call: (274) [system] atom(1600)
^  Redo: (273) [user] mfix_vars1(1600, _121202)
^  Unify: (273) [user] mfix_vars1(1600, _121202)
   Call: (274) [system] 1600==true
^  Redo: (273) [user] mfix_vars1(1600, _121202)
^  Unify: (273) [user] mfix_vars1(1600, _121202)
   Call: (274) [system] 1600==false
^  Redo: (273) [user] mfix_vars1(1600, _121202)
^  Unify: (273) [user] mfix_vars1(1600, _121202)
   Call: (274) [system] 1600==[_135128, _135134]
^  Redo: (273) [user] mfix_vars1(1600, _121202)
^  Unify: (273) [user] mfix_vars1(1600, _121202)
   Call: (274) [system] is_list(1600)
^  Redo: (273) [user] mfix_vars1(1600, _121202)
^  Unify: (273) [user] mfix_vars1(1600, _121202)
   Call: (274) [system] string(1600)
^  Redo: (273) [user] mfix_vars1(1600, _121202)
^  Unify: (273) [user] mfix_vars1(1600, _121202)
   Call: (274) [system] compound(1600)
^  Redo: (273) [user] mfix_vars1(1600, _121202)
^  Unify: (273) [user] mfix_vars1(1600, _121202)
^  Call: (274) [user] symbol(1600)
^  Unify: (274) [user] symbol(1600)
   Call: (275) [system] atom(1600)
   Fail: (275) [system] atom(1600)
^  Fail: (274) [user] symbol(1600)
^  Redo: (273) [user] mfix_vars1(1600, _121202)
   Call: (274) [system] 1600=_121202
   Exit: (274) [system] 1600=1600
^  Exit: (273) [user] mfix_vars1(1600, 1600)
   Call: (273) [apply] apply:maplist_([0], _121204, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_155528|_155530], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _155528)
^  Unify: (274) [user] mfix_vars1(0, _155528)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _155528)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_160174))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _155528)
^  Unify: (274) [user] mfix_vars1(0, _155528)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _155528)
^  Unify: (274) [user] mfix_vars1(0, _155528)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _155528)
^  Unify: (274) [user] mfix_vars1(0, _155528)
   Call: (275) [system] 0==[_169454, _169460]
^  Redo: (274) [user] mfix_vars1(0, _155528)
^  Unify: (274) [user] mfix_vars1(0, _155528)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _155528)
^  Unify: (274) [user] mfix_vars1(0, _155528)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _155528)
^  Unify: (274) [user] mfix_vars1(0, _155528)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _155528)
^  Unify: (274) [user] mfix_vars1(0, _155528)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _155528)
   Call: (275) [system] 0=_155528
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _155530, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1600, 0], [1600, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@kind\" \"atom\")", 1600, 0], [";;             (\"@kind\" \"atom\")", 1600, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@kind\" \"atom\")", 1600, 0], [";;             (\"@kind\" \"atom\")", 1600, 0])
   Call: (270) [system] compound_name_arguments(_49702, '$COMMENT', [";;             (\"@kind\" \"atom\")", 1600, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT', [";;             (\"@kind\" \"atom\")", 1600, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0)\=@='$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _44116)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _205702))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _205702))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _205702))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _205702))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _205702)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _205702)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _211288))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _211288))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _211288)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _211288)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _211288)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0)\=@='$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _205702)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _38504))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _38504))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _38504))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _38504))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _38504)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _38504)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _233608))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _233608))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _233608)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _233608)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _233608)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0)\=@='$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _38504)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0)\=@='$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _262386, [], _262388)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _262386, [], _262388)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _262386, [], _262388)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _262386, [], _262388)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _262386, [], _262388)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), _271702, _271704)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT', [";;             (\"@kind\" \"atom\")", 1600, 0])
^  Call: (258) [user] subst_vars([";;             (\"@kind\" \"atom\")", 1600, 0], _273588, [], _262388)
^  Unify: (258) [user] subst_vars([";;             (\"@kind\" \"atom\")", 1600, 0], [";;             (\"@kind\" \"atom\")", 1600, 0], [], [])
   Call: (259) [system] var([";;             (\"@kind\" \"atom\")", 1600, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@kind\" \"atom\")", 1600, 0], _273588, [], _262388)
^  Unify: (258) [user] subst_vars([";;             (\"@kind\" \"atom\")", 1600, 0], [_277324|_277326], [], _262388)
^  Call: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", _277324, [], _278264)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", ";;             (\"@kind\" \"atom\")", [], [])
   Call: (260) [system] var(";;             (\"@kind\" \"atom\")")
^  Redo: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", _277324, [], _278264)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", _277324, [], _278264)
   Call: (260) [system] atom(";;             (\"@kind\" \"atom\")")
^  Redo: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", _277324, [], _278264)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", _277324, [], _278264)
   Call: (260) [system] compound(";;             (\"@kind\" \"atom\")")
^  Redo: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", _277324, [], _278264)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", ";;             (\"@kind\" \"atom\")", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", ";;             (\"@kind\" \"atom\")", [], [])
^  Call: (259) [user] subst_vars([1600, 0], _277326, [], _262388)
^  Unify: (259) [user] subst_vars([1600, 0], [1600, 0], [], [])
   Call: (260) [system] var([1600, 0])
^  Redo: (259) [user] subst_vars([1600, 0], _277326, [], _262388)
^  Unify: (259) [user] subst_vars([1600, 0], [_293196|_293198], [], _262388)
^  Call: (260) [user] subst_vars(1600, _293196, [], _294136)
^  Unify: (260) [user] subst_vars(1600, 1600, [], [])
   Call: (261) [system] var(1600)
^  Redo: (260) [user] subst_vars(1600, _293196, [], _294136)
^  Unify: (260) [user] subst_vars(1600, _293196, [], _294136)
   Call: (261) [system] atom(1600)
^  Redo: (260) [user] subst_vars(1600, _293196, [], _294136)
^  Unify: (260) [user] subst_vars(1600, _293196, [], _294136)
   Call: (261) [system] compound(1600)
^  Redo: (260) [user] subst_vars(1600, _293196, [], _294136)
^  Unify: (260) [user] subst_vars(1600, 1600, [], [])
^  Exit: (260) [user] subst_vars(1600, 1600, [], [])
^  Call: (260) [user] subst_vars([0], _293198, [], _262388)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _293198, [], _262388)
^  Unify: (260) [user] subst_vars([0], [_309068|_309070], [], _262388)
^  Call: (261) [user] subst_vars(0, _309068, [], _310008)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _309068, [], _310008)
^  Unify: (261) [user] subst_vars(0, _309068, [], _310008)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _309068, [], _310008)
^  Unify: (261) [user] subst_vars(0, _309068, [], _310008)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _309068, [], _310008)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _309070, [], _262388)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _309070, [], _262388)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1600, 0], [1600, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@kind\" \"atom\")", 1600, 0], [";;             (\"@kind\" \"atom\")", 1600, 0], [], [])
   Call: (258) [system] compound_name_arguments(_262386, '$COMMENT', [";;             (\"@kind\" \"atom\")", 1600, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT', [";;             (\"@kind\" \"atom\")", 1600, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), [], [])
   Call: (257) [system] _332426=metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1600, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1601, 0, 57482, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$stream_position'(57482, 1601, 0, 57516)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _385150))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _385150))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _385150)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _385150)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _385150)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _385150)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _390762))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _390762))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _390762))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _390762))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _390762)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _390762)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _396348))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _396348))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _396348)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _396348)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _396348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _396348)
   Call: (270) [system] var('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _396348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$VAR'(_403808))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _396348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _396348)
   Call: (270) [system] '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _396348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _396348)
   Call: (270) [system] '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _396348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _396348)
   Call: (270) [system] '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0)==[_413088, _413094]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _396348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _396348)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _396348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _396348)
   Call: (270) [system] string('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _396348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _396348)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _423290, _423292)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT', [";;             (\"@type\" \"SomeType\")", 1601, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@type\" \"SomeType\")", 1601, 0], _427032)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@type\" \"SomeType\")", 1601, 0], _427032)
   Call: (271) [apply] apply:maplist_([";;             (\"@type\" \"SomeType\")", 1601, 0], _427032, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@type\" \"SomeType\")", 1601, 0], [_429850|_429852], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@type\" \"SomeType\")", _429850)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"SomeType\")", _429850)
   Call: (273) [system] var(";;             (\"@type\" \"SomeType\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"SomeType\")", _429850)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"SomeType\")", '$VAR'(_434496))
   Call: (273) [system] atom(";;             (\"@type\" \"SomeType\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"SomeType\")", _429850)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"SomeType\")", _429850)
   Call: (273) [system] ";;             (\"@type\" \"SomeType\")"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"SomeType\")", _429850)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"SomeType\")", _429850)
   Call: (273) [system] ";;             (\"@type\" \"SomeType\")"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"SomeType\")", _429850)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"SomeType\")", _429850)
   Call: (273) [system] ";;             (\"@type\" \"SomeType\")"==[_443776, _443782]
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"SomeType\")", _429850)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"SomeType\")", _429850)
   Call: (273) [system] is_list(";;             (\"@type\" \"SomeType\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"SomeType\")", _429850)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"SomeType\")", _429850)
   Call: (273) [system] string(";;             (\"@type\" \"SomeType\")")
   Exit: (273) [system] string(";;             (\"@type\" \"SomeType\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"SomeType\")", _429850)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"SomeType\")", _429850)
   Call: (273) [system] compound(";;             (\"@type\" \"SomeType\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"SomeType\")", _429850)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"SomeType\")", _429850)
^  Call: (273) [user] symbol(";;             (\"@type\" \"SomeType\")")
^  Unify: (273) [user] symbol(";;             (\"@type\" \"SomeType\")")
   Call: (274) [system] atom(";;             (\"@type\" \"SomeType\")")
   Fail: (274) [system] atom(";;             (\"@type\" \"SomeType\")")
^  Fail: (273) [user] symbol(";;             (\"@type\" \"SomeType\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"SomeType\")", _429850)
   Call: (273) [system] ";;             (\"@type\" \"SomeType\")"=_429850
   Exit: (273) [system] ";;             (\"@type\" \"SomeType\")"=";;             (\"@type\" \"SomeType\")"
^  Exit: (272) [user] mfix_vars1(";;             (\"@type\" \"SomeType\")", ";;             (\"@type\" \"SomeType\")")
   Call: (272) [apply] apply:maplist_([1601, 0], _429852, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1601, 0], [_467848|_467850], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1601, _467848)
^  Unify: (273) [user] mfix_vars1(1601, _467848)
   Call: (274) [system] var(1601)
^  Redo: (273) [user] mfix_vars1(1601, _467848)
^  Unify: (273) [user] mfix_vars1(1601, '$VAR'(_472494))
   Call: (274) [system] atom(1601)
^  Redo: (273) [user] mfix_vars1(1601, _467848)
^  Unify: (273) [user] mfix_vars1(1601, _467848)
   Call: (274) [system] 1601==true
^  Redo: (273) [user] mfix_vars1(1601, _467848)
^  Unify: (273) [user] mfix_vars1(1601, _467848)
   Call: (274) [system] 1601==false
^  Redo: (273) [user] mfix_vars1(1601, _467848)
^  Unify: (273) [user] mfix_vars1(1601, _467848)
   Call: (274) [system] 1601==[_481774, _481780]
^  Redo: (273) [user] mfix_vars1(1601, _467848)
^  Unify: (273) [user] mfix_vars1(1601, _467848)
   Call: (274) [system] is_list(1601)
^  Redo: (273) [user] mfix_vars1(1601, _467848)
^  Unify: (273) [user] mfix_vars1(1601, _467848)
   Call: (274) [system] string(1601)
^  Redo: (273) [user] mfix_vars1(1601, _467848)
^  Unify: (273) [user] mfix_vars1(1601, _467848)
   Call: (274) [system] compound(1601)
^  Redo: (273) [user] mfix_vars1(1601, _467848)
^  Unify: (273) [user] mfix_vars1(1601, _467848)
^  Call: (274) [user] symbol(1601)
^  Unify: (274) [user] symbol(1601)
   Call: (275) [system] atom(1601)
   Fail: (275) [system] atom(1601)
^  Fail: (274) [user] symbol(1601)
^  Redo: (273) [user] mfix_vars1(1601, _467848)
   Call: (274) [system] 1601=_467848
   Exit: (274) [system] 1601=1601
^  Exit: (273) [user] mfix_vars1(1601, 1601)
   Call: (273) [apply] apply:maplist_([0], _467850, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_502174|_502176], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _502174)
^  Unify: (274) [user] mfix_vars1(0, _502174)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _502174)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_506820))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _502174)
^  Unify: (274) [user] mfix_vars1(0, _502174)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _502174)
^  Unify: (274) [user] mfix_vars1(0, _502174)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _502174)
^  Unify: (274) [user] mfix_vars1(0, _502174)
   Call: (275) [system] 0==[_516100, _516106]
^  Redo: (274) [user] mfix_vars1(0, _502174)
^  Unify: (274) [user] mfix_vars1(0, _502174)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _502174)
^  Unify: (274) [user] mfix_vars1(0, _502174)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _502174)
^  Unify: (274) [user] mfix_vars1(0, _6042)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _6042)
^  Unify: (274) [user] mfix_vars1(0, _6042)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6042)
   Call: (275) [system] 0=_6042
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6044, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1601, 0], [1601, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@type\" \"SomeType\")", 1601, 0], [";;             (\"@type\" \"SomeType\")", 1601, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@type\" \"SomeType\")", 1601, 0], [";;             (\"@type\" \"SomeType\")", 1601, 0])
   Call: (270) [system] compound_name_arguments(_5984, '$COMMENT', [";;             (\"@type\" \"SomeType\")", 1601, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT', [";;             (\"@type\" \"SomeType\")", 1601, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0)\=@='$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _5970)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _34516))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _34516))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _34516))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _34516))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _34516)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _34516)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _40102))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _40102))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _40102)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _40102)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _40102)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0)\=@='$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _34516)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _62422))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _62422))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _62422)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _62422)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _62422)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0)\=@='$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0)\=@='$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _91200, [], _91202)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _91200, [], _91202)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _91200, [], _91202)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _91200, [], _91202)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _91200, [], _91202)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), _100516, _100518)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT', [";;             (\"@type\" \"SomeType\")", 1601, 0])
^  Call: (258) [user] subst_vars([";;             (\"@type\" \"SomeType\")", 1601, 0], _102402, [], _91202)
^  Unify: (258) [user] subst_vars([";;             (\"@type\" \"SomeType\")", 1601, 0], [";;             (\"@type\" \"SomeType\")", 1601, 0], [], [])
   Call: (259) [system] var([";;             (\"@type\" \"SomeType\")", 1601, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@type\" \"SomeType\")", 1601, 0], _102402, [], _91202)
^  Unify: (258) [user] subst_vars([";;             (\"@type\" \"SomeType\")", 1601, 0], [_106138|_106140], [], _91202)
^  Call: (259) [user] subst_vars(";;             (\"@type\" \"SomeType\")", _106138, [], _107078)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" \"SomeType\")", ";;             (\"@type\" \"SomeType\")", [], [])
   Call: (260) [system] var(";;             (\"@type\" \"SomeType\")")
^  Redo: (259) [user] subst_vars(";;             (\"@type\" \"SomeType\")", _106138, [], _107078)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" \"SomeType\")", _106138, [], _107078)
   Call: (260) [system] atom(";;             (\"@type\" \"SomeType\")")
^  Redo: (259) [user] subst_vars(";;             (\"@type\" \"SomeType\")", _106138, [], _107078)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" \"SomeType\")", _106138, [], _107078)
   Call: (260) [system] compound(";;             (\"@type\" \"SomeType\")")
^  Redo: (259) [user] subst_vars(";;             (\"@type\" \"SomeType\")", _106138, [], _107078)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" \"SomeType\")", ";;             (\"@type\" \"SomeType\")", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@type\" \"SomeType\")", ";;             (\"@type\" \"SomeType\")", [], [])
^  Call: (259) [user] subst_vars([1601, 0], _106140, [], _91202)
^  Unify: (259) [user] subst_vars([1601, 0], [1601, 0], [], [])
   Call: (260) [system] var([1601, 0])
^  Redo: (259) [user] subst_vars([1601, 0], _106140, [], _91202)
^  Unify: (259) [user] subst_vars([1601, 0], [_122010|_122012], [], _91202)
^  Call: (260) [user] subst_vars(1601, _122010, [], _122950)
^  Unify: (260) [user] subst_vars(1601, 1601, [], [])
   Call: (261) [system] var(1601)
^  Redo: (260) [user] subst_vars(1601, _122010, [], _122950)
^  Unify: (260) [user] subst_vars(1601, _122010, [], _122950)
   Call: (261) [system] atom(1601)
^  Redo: (260) [user] subst_vars(1601, _122010, [], _122950)
^  Unify: (260) [user] subst_vars(1601, _122010, [], _122950)
   Call: (261) [system] compound(1601)
^  Redo: (260) [user] subst_vars(1601, _122010, [], _122950)
^  Unify: (260) [user] subst_vars(1601, 1601, [], [])
^  Exit: (260) [user] subst_vars(1601, 1601, [], [])
^  Call: (260) [user] subst_vars([0], _122012, [], _91202)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _122012, [], _91202)
^  Unify: (260) [user] subst_vars([0], [_137882|_137884], [], _91202)
^  Call: (261) [user] subst_vars(0, _137882, [], _138822)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _137882, [], _138822)
^  Unify: (261) [user] subst_vars(0, _137882, [], _138822)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _137882, [], _138822)
^  Unify: (261) [user] subst_vars(0, _137882, [], _138822)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _137882, [], _138822)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _137884, [], _91202)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _137884, [], _91202)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1601, 0], [1601, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@type\" \"SomeType\")", 1601, 0], [";;             (\"@type\" \"SomeType\")", 1601, 0], [], [])
   Call: (258) [system] compound_name_arguments(_91200, '$COMMENT', [";;             (\"@type\" \"SomeType\")", 1601, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT', [";;             (\"@type\" \"SomeType\")", 1601, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), [], [])
   Call: (257) [system] _161240=metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"SomeType\")", 1601, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1602, 0, 57518, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$stream_position'(57518, 1602, 0, 57552)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _213976))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _213976))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _213976)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _213976)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _213976)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _213976)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _219588))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _219588))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _219588))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _219588))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _219588)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _219588)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _225174))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _225174))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _225174)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _225174)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _225174)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _225174)
   Call: (270) [system] var('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _225174)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$VAR'(_232634))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _225174)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _225174)
   Call: (270) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _225174)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _225174)
   Call: (270) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _225174)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _225174)
   Call: (270) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0)==[_241914, _241920]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _225174)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _225174)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _225174)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _225174)
   Call: (270) [system] string('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _225174)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _225174)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _252116, _252118)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0], _255858)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0], _255858)
   Call: (271) [apply] apply:maplist_([";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0], _255858, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0], [_258676|_258678], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _258676)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _258676)
   Call: (273) [system] var(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _258676)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", '$VAR'(_263322))
   Call: (273) [system] atom(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _258676)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _258676)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _258676)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _258676)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _258676)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _258676)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],"==[_272602, _272608]
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _258676)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _258676)
   Call: (273) [system] is_list(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _258676)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _258676)
   Call: (273) [system] string(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],")
   Exit: (273) [system] string(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _258676)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _258676)
   Call: (273) [system] compound(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _258676)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _258676)
^  Call: (273) [user] symbol(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],")
^  Unify: (273) [user] symbol(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],")
   Call: (274) [system] atom(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],")
   Fail: (274) [system] atom(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],")
^  Fail: (273) [user] symbol(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _258676)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],"=_258676
   Exit: (273) [system] ";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],"=";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],"
^  Exit: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", ";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],")
   Call: (272) [apply] apply:maplist_([1602, 0], _258678, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1602, 0], [_296674|_296676], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1602, _296674)
^  Unify: (273) [user] mfix_vars1(1602, _296674)
   Call: (274) [system] var(1602)
^  Redo: (273) [user] mfix_vars1(1602, _296674)
^  Unify: (273) [user] mfix_vars1(1602, '$VAR'(_301320))
   Call: (274) [system] atom(1602)
^  Redo: (273) [user] mfix_vars1(1602, _296674)
^  Unify: (273) [user] mfix_vars1(1602, _296674)
   Call: (274) [system] 1602==true
^  Redo: (273) [user] mfix_vars1(1602, _296674)
^  Unify: (273) [user] mfix_vars1(1602, _296674)
   Call: (274) [system] 1602==false
^  Redo: (273) [user] mfix_vars1(1602, _296674)
^  Unify: (273) [user] mfix_vars1(1602, _296674)
   Call: (274) [system] 1602==[_310600, _310606]
^  Redo: (273) [user] mfix_vars1(1602, _296674)
^  Unify: (273) [user] mfix_vars1(1602, _296674)
   Call: (274) [system] is_list(1602)
^  Redo: (273) [user] mfix_vars1(1602, _296674)
^  Unify: (273) [user] mfix_vars1(1602, _296674)
   Call: (274) [system] string(1602)
^  Redo: (273) [user] mfix_vars1(1602, _296674)
^  Unify: (273) [user] mfix_vars1(1602, _296674)
   Call: (274) [system] compound(1602)
^  Redo: (273) [user] mfix_vars1(1602, _296674)
^  Unify: (273) [user] mfix_vars1(1602, _296674)
^  Call: (274) [user] symbol(1602)
^  Unify: (274) [user] symbol(1602)
   Call: (275) [system] atom(1602)
   Fail: (275) [system] atom(1602)
^  Fail: (274) [user] symbol(1602)
^  Redo: (273) [user] mfix_vars1(1602, _296674)
   Call: (274) [system] 1602=_296674
   Exit: (274) [system] 1602=1602
^  Exit: (273) [user] mfix_vars1(1602, 1602)
   Call: (273) [apply] apply:maplist_([0], _296676, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_331000|_331002], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _331000)
^  Unify: (274) [user] mfix_vars1(0, _331000)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _331000)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_335646))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _331000)
^  Unify: (274) [user] mfix_vars1(0, _331000)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _331000)
^  Unify: (274) [user] mfix_vars1(0, _331000)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _331000)
^  Unify: (274) [user] mfix_vars1(0, _331000)
   Call: (275) [system] 0==[_344926, _344932]
^  Redo: (274) [user] mfix_vars1(0, _331000)
^  Unify: (274) [user] mfix_vars1(0, _331000)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _331000)
^  Unify: (274) [user] mfix_vars1(0, _331000)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _331000)
^  Unify: (274) [user] mfix_vars1(0, _331000)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _331000)
^  Unify: (274) [user] mfix_vars1(0, _331000)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _331000)
   Call: (275) [system] 0=_331000
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _331002, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1602, 0], [1602, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0], [";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0], [";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0])
   Call: (270) [system] compound_name_arguments(_225174, '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _219588)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _381174))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _381174))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _381174))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _381174))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _381174)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _381174)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _386760))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _386760))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _386760)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _386760)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _386760)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _381174)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _213976))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _213976))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _213976))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _213976))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _213976)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _213976)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _409080))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _409080))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _409080)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _409080)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _409080)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _213976)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _437858, [], _437860)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _437858, [], _437860)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _437858, [], _437860)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _437858, [], _437860)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _437858, [], _437860)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), _447174, _447176)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0])
^  Call: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0], _449060, [], _437860)
^  Unify: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0], [";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0], [], [])
   Call: (259) [system] var([";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0], _449060, [], _437860)
^  Unify: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0], [_452796|_452798], [], _437860)
^  Call: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _452796, [], _453736)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", ";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", [], [])
   Call: (260) [system] var(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],")
^  Redo: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _452796, [], _453736)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _452796, [], _453736)
   Call: (260) [system] atom(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],")
^  Redo: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _452796, [], _453736)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _452796, [], _453736)
   Call: (260) [system] compound(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],")
^  Redo: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", _452796, [], _453736)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", ";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", ";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", [], [])
^  Call: (259) [user] subst_vars([1602, 0], _452798, [], _437860)
^  Unify: (259) [user] subst_vars([1602, 0], [1602, 0], [], [])
   Call: (260) [system] var([1602, 0])
^  Redo: (259) [user] subst_vars([1602, 0], _452798, [], _437860)
^  Unify: (259) [user] subst_vars([1602, 0], [_468668|_468670], [], _437860)
^  Call: (260) [user] subst_vars(1602, _468668, [], _469608)
^  Unify: (260) [user] subst_vars(1602, 1602, [], [])
   Call: (261) [system] var(1602)
^  Redo: (260) [user] subst_vars(1602, _468668, [], _469608)
^  Unify: (260) [user] subst_vars(1602, _468668, [], _469608)
   Call: (261) [system] atom(1602)
^  Redo: (260) [user] subst_vars(1602, _468668, [], _469608)
^  Unify: (260) [user] subst_vars(1602, _468668, [], _469608)
   Call: (261) [system] compound(1602)
^  Redo: (260) [user] subst_vars(1602, _468668, [], _469608)
^  Unify: (260) [user] subst_vars(1602, 1602, [], [])
^  Exit: (260) [user] subst_vars(1602, 1602, [], [])
^  Call: (260) [user] subst_vars([0], _468670, [], _437860)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _468670, [], _437860)
^  Unify: (260) [user] subst_vars([0], [_484540|_484542], [], _437860)
^  Call: (261) [user] subst_vars(0, _484540, [], _485480)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _484540, [], _485480)
^  Unify: (261) [user] subst_vars(0, _484540, [], _485480)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _484540, [], _485480)
^  Unify: (261) [user] subst_vars(0, _484540, [], _485480)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _484540, [], _485480)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _484542, [], _437860)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _484542, [], _437860)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1602, 0], [1602, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0], [";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0], [], [])
   Call: (258) [system] compound_name_arguments(_437858, '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), [], [])
   Call: (257) [system] _507898=metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test symbol atom having specific type\")}) )],", 1602, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1603, 0, 57604, '$COMMENT'(";;     ]));", 1603, 0), '$stream_position'(57604, 1603, 0, 57638)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1603, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1603, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     ]));", 1603, 0), _43348))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     ]));", 1603, 0), _43348))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     ]));", 1603, 0), _43348)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     ]));", 1603, 0), _43348)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     ]));", 1603, 0), _43348)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     ]));", 1603, 0), _43348)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     ]));", 1603, 0), _48960))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1603, 0), _48960))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1603, 0), _48960))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1603, 0), _48960))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1603, 0), _48960)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1603, 0), _48960)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     ]));", 1603, 0), _54546))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     ]));", 1603, 0), _54546))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     ]));", 1603, 0), _54546)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     ]));", 1603, 0), _54546)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1603, 0), _54546)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1603, 0), _54546)
   Call: (270) [system] var('$COMMENT'(";;     ]));", 1603, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1603, 0), _54546)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1603, 0), '$VAR'(_62006))
   Call: (270) [system] atom('$COMMENT'(";;     ]));", 1603, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1603, 0), _54546)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1603, 0), _54546)
   Call: (270) [system] '$COMMENT'(";;     ]));", 1603, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1603, 0), _54546)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1603, 0), _54546)
   Call: (270) [system] '$COMMENT'(";;     ]));", 1603, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1603, 0), _54546)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1603, 0), _54546)
   Call: (270) [system] '$COMMENT'(";;     ]));", 1603, 0)==[_71286, _71292]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1603, 0), _54546)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1603, 0), _54546)
   Call: (270) [system] is_list('$COMMENT'(";;     ]));", 1603, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1603, 0), _54546)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1603, 0), _54546)
   Call: (270) [system] string('$COMMENT'(";;     ]));", 1603, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1603, 0), _54546)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1603, 0), _54546)
   Call: (270) [system] compound('$COMMENT'(";;     ]));", 1603, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     ]));", 1603, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1603, 0), _81488, _81490)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1603, 0), '$COMMENT', [";;     ]));", 1603, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     ]));", 1603, 0], _85230)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     ]));", 1603, 0], _85230)
   Call: (271) [apply] apply:maplist_([";;     ]));", 1603, 0], _85230, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     ]));", 1603, 0], [_88048|_88050], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     ]));", _88048)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _88048)
   Call: (273) [system] var(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _88048)
^  Unify: (272) [user] mfix_vars1(";;     ]));", '$VAR'(_92694))
   Call: (273) [system] atom(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _88048)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _88048)
   Call: (273) [system] ";;     ]));"==true
^  Redo: (272) [user] mfix_vars1(";;     ]));", _88048)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _88048)
   Call: (273) [system] ";;     ]));"==false
^  Redo: (272) [user] mfix_vars1(";;     ]));", _88048)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _88048)
   Call: (273) [system] ";;     ]));"==[_101974, _101980]
^  Redo: (272) [user] mfix_vars1(";;     ]));", _88048)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _88048)
   Call: (273) [system] is_list(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _88048)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _88048)
   Call: (273) [system] string(";;     ]));")
   Exit: (273) [system] string(";;     ]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     ]));", _88048)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _88048)
   Call: (273) [system] compound(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _88048)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _88048)
^  Call: (273) [user] symbol(";;     ]));")
^  Unify: (273) [user] symbol(";;     ]));")
   Call: (274) [system] atom(";;     ]));")
   Fail: (274) [system] atom(";;     ]));")
^  Fail: (273) [user] symbol(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _88048)
   Call: (273) [system] ";;     ]));"=_88048
   Exit: (273) [system] ";;     ]));"=";;     ]));"
^  Exit: (272) [user] mfix_vars1(";;     ]));", ";;     ]));")
   Call: (272) [apply] apply:maplist_([1603, 0], _88050, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1603, 0], [_126046|_126048], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1603, _126046)
^  Unify: (273) [user] mfix_vars1(1603, _126046)
   Call: (274) [system] var(1603)
^  Redo: (273) [user] mfix_vars1(1603, _126046)
^  Unify: (273) [user] mfix_vars1(1603, '$VAR'(_130692))
   Call: (274) [system] atom(1603)
^  Redo: (273) [user] mfix_vars1(1603, _126046)
^  Unify: (273) [user] mfix_vars1(1603, _126046)
   Call: (274) [system] 1603==true
^  Redo: (273) [user] mfix_vars1(1603, _126046)
^  Unify: (273) [user] mfix_vars1(1603, _126046)
   Call: (274) [system] 1603==false
^  Redo: (273) [user] mfix_vars1(1603, _126046)
^  Unify: (273) [user] mfix_vars1(1603, _126046)
   Call: (274) [system] 1603==[_139972, _139978]
^  Redo: (273) [user] mfix_vars1(1603, _126046)
^  Unify: (273) [user] mfix_vars1(1603, _126046)
   Call: (274) [system] is_list(1603)
^  Redo: (273) [user] mfix_vars1(1603, _126046)
^  Unify: (273) [user] mfix_vars1(1603, _126046)
   Call: (274) [system] string(1603)
^  Redo: (273) [user] mfix_vars1(1603, _126046)
^  Unify: (273) [user] mfix_vars1(1603, _126046)
   Call: (274) [system] compound(1603)
^  Redo: (273) [user] mfix_vars1(1603, _126046)
^  Unify: (273) [user] mfix_vars1(1603, _126046)
^  Call: (274) [user] symbol(1603)
^  Unify: (274) [user] symbol(1603)
   Call: (275) [system] atom(1603)
   Fail: (275) [system] atom(1603)
^  Fail: (274) [user] symbol(1603)
^  Redo: (273) [user] mfix_vars1(1603, _126046)
   Call: (274) [system] 1603=_126046
   Exit: (274) [system] 1603=1603
^  Exit: (273) [user] mfix_vars1(1603, 1603)
   Call: (273) [apply] apply:maplist_([0], _126048, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_160372|_160374], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _160372)
^  Unify: (274) [user] mfix_vars1(0, _160372)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _160372)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_165018))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _160372)
^  Unify: (274) [user] mfix_vars1(0, _160372)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _160372)
^  Unify: (274) [user] mfix_vars1(0, _160372)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _160372)
^  Unify: (274) [user] mfix_vars1(0, _160372)
   Call: (275) [system] 0==[_174298, _174304]
^  Redo: (274) [user] mfix_vars1(0, _160372)
^  Unify: (274) [user] mfix_vars1(0, _160372)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _160372)
^  Unify: (274) [user] mfix_vars1(0, _160372)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _160372)
^  Unify: (274) [user] mfix_vars1(0, _160372)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _160372)
^  Unify: (274) [user] mfix_vars1(0, _160372)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _160372)
   Call: (275) [system] 0=_160372
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _160374, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1603, 0], [1603, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     ]));", 1603, 0], [";;     ]));", 1603, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     ]));", 1603, 0], [";;     ]));", 1603, 0])
   Call: (270) [system] compound_name_arguments(_54546, '$COMMENT', [";;     ]));", 1603, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1603, 0), '$COMMENT', [";;     ]));", 1603, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0)))
   Call: (267) [system] '$COMMENT'(";;     ]));", 1603, 0)\=@='$COMMENT'(";;     ]));", 1603, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1603, 0), _48960)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     ]));", 1603, 0), _210546))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1603, 0), _210546))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1603, 0), _210546))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1603, 0), _210546))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1603, 0), _210546)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1603, 0), _210546)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     ]));", 1603, 0), _216132))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     ]));", 1603, 0), _216132))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     ]));", 1603, 0), _216132)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     ]));", 1603, 0), _216132)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     ]));", 1603, 0), _216132)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0)))
   Call: (267) [system] '$COMMENT'(";;     ]));", 1603, 0)\=@='$COMMENT'(";;     ]));", 1603, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1603, 0), _210546)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     ]));", 1603, 0), _43348))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1603, 0), _43348))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1603, 0), _43348))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1603, 0), _43348))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1603, 0), _43348)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1603, 0), _43348)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     ]));", 1603, 0), _238452))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     ]));", 1603, 0), _238452))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     ]));", 1603, 0), _238452)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     ]));", 1603, 0), _238452)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     ]));", 1603, 0), _238452)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0)))
   Call: (267) [system] '$COMMENT'(";;     ]));", 1603, 0)\=@='$COMMENT'(";;     ]));", 1603, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1603, 0), _43348)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0)))
   Call: (261) [system] '$COMMENT'(";;     ]));", 1603, 0)\=@='$COMMENT'(";;     ]));", 1603, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1603, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1603, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1603, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1603, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1603, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1603, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1603, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1603, 0), _267230, [], _267232)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     ]));", 1603, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1603, 0), _267230, [], _267232)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1603, 0), _267230, [], _267232)
   Call: (258) [system] atom('$COMMENT'(";;     ]));", 1603, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1603, 0), _267230, [], _267232)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1603, 0), _267230, [], _267232)
   Call: (258) [system] compound('$COMMENT'(";;     ]));", 1603, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     ]));", 1603, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1603, 0), _276546, _276548)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1603, 0), '$COMMENT', [";;     ]));", 1603, 0])
^  Call: (258) [user] subst_vars([";;     ]));", 1603, 0], _278432, [], _267232)
^  Unify: (258) [user] subst_vars([";;     ]));", 1603, 0], [";;     ]));", 1603, 0], [], [])
   Call: (259) [system] var([";;     ]));", 1603, 0])
^  Redo: (258) [user] subst_vars([";;     ]));", 1603, 0], _278432, [], _267232)
^  Unify: (258) [user] subst_vars([";;     ]));", 1603, 0], [_282168|_282170], [], _267232)
^  Call: (259) [user] subst_vars(";;     ]));", _282168, [], _283108)
^  Unify: (259) [user] subst_vars(";;     ]));", ";;     ]));", [], [])
   Call: (260) [system] var(";;     ]));")
^  Redo: (259) [user] subst_vars(";;     ]));", _282168, [], _283108)
^  Unify: (259) [user] subst_vars(";;     ]));", _282168, [], _283108)
   Call: (260) [system] atom(";;     ]));")
^  Redo: (259) [user] subst_vars(";;     ]));", _282168, [], _283108)
^  Unify: (259) [user] subst_vars(";;     ]));", _282168, [], _283108)
   Call: (260) [system] compound(";;     ]));")
^  Redo: (259) [user] subst_vars(";;     ]));", _282168, [], _283108)
^  Unify: (259) [user] subst_vars(";;     ]));", ";;     ]));", [], [])
^  Exit: (259) [user] subst_vars(";;     ]));", ";;     ]));", [], [])
^  Call: (259) [user] subst_vars([1603, 0], _282170, [], _267232)
^  Unify: (259) [user] subst_vars([1603, 0], [1603, 0], [], [])
   Call: (260) [system] var([1603, 0])
^  Redo: (259) [user] subst_vars([1603, 0], _282170, [], _267232)
^  Unify: (259) [user] subst_vars([1603, 0], [_298040|_298042], [], _267232)
^  Call: (260) [user] subst_vars(1603, _298040, [], _298980)
^  Unify: (260) [user] subst_vars(1603, 1603, [], [])
   Call: (261) [system] var(1603)
^  Redo: (260) [user] subst_vars(1603, _298040, [], _298980)
^  Unify: (260) [user] subst_vars(1603, _298040, [], _298980)
   Call: (261) [system] atom(1603)
^  Redo: (260) [user] subst_vars(1603, _298040, [], _298980)
^  Unify: (260) [user] subst_vars(1603, _298040, [], _298980)
   Call: (261) [system] compound(1603)
^  Redo: (260) [user] subst_vars(1603, _298040, [], _298980)
^  Unify: (260) [user] subst_vars(1603, 1603, [], [])
^  Exit: (260) [user] subst_vars(1603, 1603, [], [])
^  Call: (260) [user] subst_vars([0], _298042, [], _267232)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _298042, [], _267232)
^  Unify: (260) [user] subst_vars([0], [_313912|_313914], [], _267232)
^  Call: (261) [user] subst_vars(0, _313912, [], _314852)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _313912, [], _314852)
^  Unify: (261) [user] subst_vars(0, _313912, [], _314852)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _313912, [], _314852)
^  Unify: (261) [user] subst_vars(0, _313912, [], _314852)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _313912, [], _314852)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _313914, [], _267232)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _313914, [], _267232)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1603, 0], [1603, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     ]));", 1603, 0], [";;     ]));", 1603, 0], [], [])
   Call: (258) [system] compound_name_arguments(_267230, '$COMMENT', [";;     ]));", 1603, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1603, 0), '$COMMENT', [";;     ]));", 1603, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1603, 0), '$COMMENT'(";;     ]));", 1603, 0), [], [])
   Call: (257) [system] _337270=metta_file_buffer(+, '$COMMENT'(";;     ]));", 1603, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     ]));", 1603, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     ]));", 1603, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     ]));", 1603, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     ]));", 1603, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1603, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1603, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1603, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1603, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1604, 0, 57616, '$COMMENT'(";; }", 1604, 0), '$stream_position'(57616, 1604, 0, 57650)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1604, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1604, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; }", 1604, 0), _389986))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1604, 0), _389986))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; }", 1604, 0), _389986)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1604, 0), _389986)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1604, 0), _389986)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1604, 0), _389986)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; }", 1604, 0), _395598))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1604, 0), _395598))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1604, 0), _395598))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1604, 0), _395598))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1604, 0), _395598)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1604, 0), _395598)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; }", 1604, 0), _401184))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1604, 0), _401184))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; }", 1604, 0), _401184)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1604, 0), _401184)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; }", 1604, 0), _401184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1604, 0), _401184)
   Call: (270) [system] var('$COMMENT'(";; }", 1604, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1604, 0), _401184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1604, 0), '$VAR'(_408644))
   Call: (270) [system] atom('$COMMENT'(";; }", 1604, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1604, 0), _401184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1604, 0), _401184)
   Call: (270) [system] '$COMMENT'(";; }", 1604, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1604, 0), _401184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1604, 0), _401184)
   Call: (270) [system] '$COMMENT'(";; }", 1604, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1604, 0), _401184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1604, 0), _401184)
   Call: (270) [system] '$COMMENT'(";; }", 1604, 0)==[_417924, _417930]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1604, 0), _401184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1604, 0), _401184)
   Call: (270) [system] is_list('$COMMENT'(";; }", 1604, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1604, 0), _401184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1604, 0), _401184)
   Call: (270) [system] string('$COMMENT'(";; }", 1604, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1604, 0), _401184)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1604, 0), _401184)
   Call: (270) [system] compound('$COMMENT'(";; }", 1604, 0))
   Exit: (270) [system] compound('$COMMENT'(";; }", 1604, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1604, 0), _428126, _428128)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1604, 0), '$COMMENT', [";; }", 1604, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; }", 1604, 0], _431868)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1604, 0], _431868)
   Call: (271) [apply] apply:maplist_([";; }", 1604, 0], _431868, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; }", 1604, 0], [_434686|_434688], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; }", _434686)
^  Unify: (272) [user] mfix_vars1(";; }", _434686)
   Call: (273) [system] var(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _434686)
^  Unify: (272) [user] mfix_vars1(";; }", '$VAR'(_439332))
   Call: (273) [system] atom(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _434686)
^  Unify: (272) [user] mfix_vars1(";; }", _434686)
   Call: (273) [system] ";; }"==true
^  Redo: (272) [user] mfix_vars1(";; }", _434686)
^  Unify: (272) [user] mfix_vars1(";; }", _434686)
   Call: (273) [system] ";; }"==false
^  Redo: (272) [user] mfix_vars1(";; }", _434686)
^  Unify: (272) [user] mfix_vars1(";; }", _434686)
   Call: (273) [system] ";; }"==[_448612, _448618]
^  Redo: (272) [user] mfix_vars1(";; }", _434686)
^  Unify: (272) [user] mfix_vars1(";; }", _434686)
   Call: (273) [system] is_list(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _434686)
^  Unify: (272) [user] mfix_vars1(";; }", _434686)
   Call: (273) [system] string(";; }")
   Exit: (273) [system] string(";; }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; }", _434686)
^  Unify: (272) [user] mfix_vars1(";; }", _434686)
   Call: (273) [system] compound(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _434686)
^  Unify: (272) [user] mfix_vars1(";; }", _434686)
^  Call: (273) [user] symbol(";; }")
^  Unify: (273) [user] symbol(";; }")
   Call: (274) [system] atom(";; }")
   Fail: (274) [system] atom(";; }")
^  Fail: (273) [user] symbol(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _434686)
   Call: (273) [system] ";; }"=_434686
   Exit: (273) [system] ";; }"=";; }"
^  Exit: (272) [user] mfix_vars1(";; }", ";; }")
   Call: (272) [apply] apply:maplist_([1604, 0], _434688, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1604, 0], [_472684|_472686], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1604, _472684)
^  Unify: (273) [user] mfix_vars1(1604, _472684)
   Call: (274) [system] var(1604)
^  Redo: (273) [user] mfix_vars1(1604, _472684)
^  Unify: (273) [user] mfix_vars1(1604, '$VAR'(_477330))
   Call: (274) [system] atom(1604)
^  Redo: (273) [user] mfix_vars1(1604, _472684)
^  Unify: (273) [user] mfix_vars1(1604, _472684)
   Call: (274) [system] 1604==true
^  Redo: (273) [user] mfix_vars1(1604, _472684)
^  Unify: (273) [user] mfix_vars1(1604, _472684)
   Call: (274) [system] 1604==false
^  Redo: (273) [user] mfix_vars1(1604, _472684)
^  Unify: (273) [user] mfix_vars1(1604, _472684)
   Call: (274) [system] 1604==[_486610, _486616]
^  Redo: (273) [user] mfix_vars1(1604, _472684)
^  Unify: (273) [user] mfix_vars1(1604, _472684)
   Call: (274) [system] is_list(1604)
^  Redo: (273) [user] mfix_vars1(1604, _472684)
^  Unify: (273) [user] mfix_vars1(1604, _472684)
   Call: (274) [system] string(1604)
^  Redo: (273) [user] mfix_vars1(1604, _472684)
^  Unify: (273) [user] mfix_vars1(1604, _472684)
   Call: (274) [system] compound(1604)
^  Redo: (273) [user] mfix_vars1(1604, _472684)
^  Unify: (273) [user] mfix_vars1(1604, _472684)
^  Call: (274) [user] symbol(1604)
^  Unify: (274) [user] symbol(1604)
   Call: (275) [system] atom(1604)
   Fail: (275) [system] atom(1604)
^  Fail: (274) [user] symbol(1604)
^  Redo: (273) [user] mfix_vars1(1604, _472684)
   Call: (274) [system] 1604=_472684
   Exit: (274) [system] 1604=1604
^  Exit: (273) [user] mfix_vars1(1604, 1604)
   Call: (273) [apply] apply:maplist_([0], _472686, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_507010|_507012], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _507010)
^  Unify: (274) [user] mfix_vars1(0, _507010)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _507010)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_511656))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _507010)
^  Unify: (274) [user] mfix_vars1(0, _507010)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _507010)
^  Unify: (274) [user] mfix_vars1(0, _507010)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _507010)
^  Unify: (274) [user] mfix_vars1(0, _507010)
   Call: (275) [system] 0==[_520936, _520942]
^  Redo: (274) [user] mfix_vars1(0, _507010)
^  Unify: (274) [user] mfix_vars1(0, _507010)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _6034)
^  Unify: (274) [user] mfix_vars1(0, _6034)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _6034)
^  Unify: (274) [user] mfix_vars1(0, _6034)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _6034)
^  Unify: (274) [user] mfix_vars1(0, _6034)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6034)
   Call: (275) [system] 0=_6034
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6036, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1604, 0], [1604, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; }", 1604, 0], [";; }", 1604, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1604, 0], [";; }", 1604, 0])
   Call: (270) [system] compound_name_arguments(_5976, '$COMMENT', [";; }", 1604, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1604, 0), '$COMMENT', [";; }", 1604, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1604, 0)\=@='$COMMENT'(";; }", 1604, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1604, 0), _5962)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; }", 1604, 0), _39276))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1604, 0), _39276))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1604, 0), _39276))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1604, 0), _39276))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1604, 0), _39276)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1604, 0), _39276)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; }", 1604, 0), _44862))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1604, 0), _44862))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; }", 1604, 0), _44862)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1604, 0), _44862)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; }", 1604, 0), _44862)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1604, 0)\=@='$COMMENT'(";; }", 1604, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1604, 0), _39276)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; }", 1604, 0), _5942))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1604, 0), _5942))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1604, 0), _5942))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1604, 0), _5942))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1604, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1604, 0), _5942)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; }", 1604, 0), _67182))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1604, 0), _67182))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; }", 1604, 0), _67182)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1604, 0), _67182)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; }", 1604, 0), _67182)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1604, 0)\=@='$COMMENT'(";; }", 1604, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1604, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0)))
   Call: (261) [system] '$COMMENT'(";; }", 1604, 0)\=@='$COMMENT'(";; }", 1604, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1604, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1604, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1604, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1604, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1604, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; }", 1604, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; }", 1604, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; }", 1604, 0), _95960, [], _95962)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; }", 1604, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1604, 0), _95960, [], _95962)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1604, 0), _95960, [], _95962)
   Call: (258) [system] atom('$COMMENT'(";; }", 1604, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1604, 0), _95960, [], _95962)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1604, 0), _95960, [], _95962)
   Call: (258) [system] compound('$COMMENT'(";; }", 1604, 0))
   Exit: (258) [system] compound('$COMMENT'(";; }", 1604, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1604, 0), _105276, _105278)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1604, 0), '$COMMENT', [";; }", 1604, 0])
^  Call: (258) [user] subst_vars([";; }", 1604, 0], _107162, [], _95962)
^  Unify: (258) [user] subst_vars([";; }", 1604, 0], [";; }", 1604, 0], [], [])
   Call: (259) [system] var([";; }", 1604, 0])
^  Redo: (258) [user] subst_vars([";; }", 1604, 0], _107162, [], _95962)
^  Unify: (258) [user] subst_vars([";; }", 1604, 0], [_110898|_110900], [], _95962)
^  Call: (259) [user] subst_vars(";; }", _110898, [], _111838)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
   Call: (260) [system] var(";; }")
^  Redo: (259) [user] subst_vars(";; }", _110898, [], _111838)
^  Unify: (259) [user] subst_vars(";; }", _110898, [], _111838)
   Call: (260) [system] atom(";; }")
^  Redo: (259) [user] subst_vars(";; }", _110898, [], _111838)
^  Unify: (259) [user] subst_vars(";; }", _110898, [], _111838)
   Call: (260) [system] compound(";; }")
^  Redo: (259) [user] subst_vars(";; }", _110898, [], _111838)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Exit: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Call: (259) [user] subst_vars([1604, 0], _110900, [], _95962)
^  Unify: (259) [user] subst_vars([1604, 0], [1604, 0], [], [])
   Call: (260) [system] var([1604, 0])
^  Redo: (259) [user] subst_vars([1604, 0], _110900, [], _95962)
^  Unify: (259) [user] subst_vars([1604, 0], [_126770|_126772], [], _95962)
^  Call: (260) [user] subst_vars(1604, _126770, [], _127710)
^  Unify: (260) [user] subst_vars(1604, 1604, [], [])
   Call: (261) [system] var(1604)
^  Redo: (260) [user] subst_vars(1604, _126770, [], _127710)
^  Unify: (260) [user] subst_vars(1604, _126770, [], _127710)
   Call: (261) [system] atom(1604)
^  Redo: (260) [user] subst_vars(1604, _126770, [], _127710)
^  Unify: (260) [user] subst_vars(1604, _126770, [], _127710)
   Call: (261) [system] compound(1604)
^  Redo: (260) [user] subst_vars(1604, _126770, [], _127710)
^  Unify: (260) [user] subst_vars(1604, 1604, [], [])
^  Exit: (260) [user] subst_vars(1604, 1604, [], [])
^  Call: (260) [user] subst_vars([0], _126772, [], _95962)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _126772, [], _95962)
^  Unify: (260) [user] subst_vars([0], [_142642|_142644], [], _95962)
^  Call: (261) [user] subst_vars(0, _142642, [], _143582)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _142642, [], _143582)
^  Unify: (261) [user] subst_vars(0, _142642, [], _143582)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _142642, [], _143582)
^  Unify: (261) [user] subst_vars(0, _142642, [], _143582)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _142642, [], _143582)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _142644, [], _95962)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _142644, [], _95962)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1604, 0], [1604, 0], [], [])
^  Exit: (258) [user] subst_vars([";; }", 1604, 0], [";; }", 1604, 0], [], [])
   Call: (258) [system] compound_name_arguments(_95960, '$COMMENT', [";; }", 1604, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1604, 0), '$COMMENT', [";; }", 1604, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; }", 1604, 0), '$COMMENT'(";; }", 1604, 0), [], [])
   Call: (257) [system] _166000=metta_file_buffer(+, '$COMMENT'(";; }", 1604, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; }", 1604, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; }", 1604, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1604, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1604, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1604, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1604, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1604, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1604, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1606, 0, 57622, '$COMMENT'(";; Converted:", 1606, 0), '$stream_position'(57622, 1606, 0, 57656)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1606, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1606, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1606, 0), _218718))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1606, 0), _218718))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1606, 0), _218718)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1606, 0), _218718)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1606, 0), _218718)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1606, 0), _218718)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1606, 0), _224330))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1606, 0), _224330))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1606, 0), _224330))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1606, 0), _224330))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1606, 0), _224330)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1606, 0), _224330)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1606, 0), _229916))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1606, 0), _229916))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1606, 0), _229916)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1606, 0), _229916)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1606, 0), _229916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1606, 0), _229916)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1606, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1606, 0), _229916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1606, 0), '$VAR'(_237376))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1606, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1606, 0), _229916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1606, 0), _229916)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1606, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1606, 0), _229916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1606, 0), _229916)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1606, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1606, 0), _229916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1606, 0), _229916)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1606, 0)==[_246656, _246662]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1606, 0), _229916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1606, 0), _229916)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1606, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1606, 0), _229916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1606, 0), _229916)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1606, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1606, 0), _229916)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1606, 0), _229916)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1606, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1606, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1606, 0), _256858, _256860)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1606, 0), '$COMMENT', [";; Converted:", 1606, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1606, 0], _260600)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1606, 0], _260600)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1606, 0], _260600, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1606, 0], [_263418|_263420], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _263418)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _263418)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _263418)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_268064))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _263418)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _263418)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _263418)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _263418)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _263418)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _263418)
   Call: (273) [system] ";; Converted:"==[_277344, _277350]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _263418)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _263418)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _263418)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _263418)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _263418)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _263418)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _263418)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _263418)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _263418)
   Call: (273) [system] ";; Converted:"=_263418
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1606, 0], _263420, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1606, 0], [_301416|_301418], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1606, _301416)
^  Unify: (273) [user] mfix_vars1(1606, _301416)
   Call: (274) [system] var(1606)
^  Redo: (273) [user] mfix_vars1(1606, _301416)
^  Unify: (273) [user] mfix_vars1(1606, '$VAR'(_306062))
   Call: (274) [system] atom(1606)
^  Redo: (273) [user] mfix_vars1(1606, _301416)
^  Unify: (273) [user] mfix_vars1(1606, _301416)
   Call: (274) [system] 1606==true
^  Redo: (273) [user] mfix_vars1(1606, _301416)
^  Unify: (273) [user] mfix_vars1(1606, _301416)
   Call: (274) [system] 1606==false
^  Redo: (273) [user] mfix_vars1(1606, _301416)
^  Unify: (273) [user] mfix_vars1(1606, _301416)
   Call: (274) [system] 1606==[_315342, _315348]
^  Redo: (273) [user] mfix_vars1(1606, _301416)
^  Unify: (273) [user] mfix_vars1(1606, _301416)
   Call: (274) [system] is_list(1606)
^  Redo: (273) [user] mfix_vars1(1606, _301416)
^  Unify: (273) [user] mfix_vars1(1606, _301416)
   Call: (274) [system] string(1606)
^  Redo: (273) [user] mfix_vars1(1606, _301416)
^  Unify: (273) [user] mfix_vars1(1606, _301416)
   Call: (274) [system] compound(1606)
^  Redo: (273) [user] mfix_vars1(1606, _301416)
^  Unify: (273) [user] mfix_vars1(1606, _301416)
^  Call: (274) [user] symbol(1606)
^  Unify: (274) [user] symbol(1606)
   Call: (275) [system] atom(1606)
   Fail: (275) [system] atom(1606)
^  Fail: (274) [user] symbol(1606)
^  Redo: (273) [user] mfix_vars1(1606, _301416)
   Call: (274) [system] 1606=_301416
   Exit: (274) [system] 1606=1606
^  Exit: (273) [user] mfix_vars1(1606, 1606)
   Call: (273) [apply] apply:maplist_([0], _301418, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_335742|_335744], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _335742)
^  Unify: (274) [user] mfix_vars1(0, _335742)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _335742)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_340388))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _335742)
^  Unify: (274) [user] mfix_vars1(0, _335742)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _335742)
^  Unify: (274) [user] mfix_vars1(0, _335742)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _335742)
^  Unify: (274) [user] mfix_vars1(0, _335742)
   Call: (275) [system] 0==[_349668, _349674]
^  Redo: (274) [user] mfix_vars1(0, _335742)
^  Unify: (274) [user] mfix_vars1(0, _335742)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _335742)
^  Unify: (274) [user] mfix_vars1(0, _335742)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _335742)
^  Unify: (274) [user] mfix_vars1(0, _335742)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _335742)
^  Unify: (274) [user] mfix_vars1(0, _335742)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _335742)
   Call: (275) [system] 0=_335742
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _335744, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1606, 0], [1606, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1606, 0], [";; Converted:", 1606, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1606, 0], [";; Converted:", 1606, 0])
   Call: (270) [system] compound_name_arguments(_229916, '$COMMENT', [";; Converted:", 1606, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1606, 0), '$COMMENT', [";; Converted:", 1606, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1606, 0)\=@='$COMMENT'(";; Converted:", 1606, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1606, 0), _224330)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1606, 0), _385916))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1606, 0), _385916))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1606, 0), _385916))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1606, 0), _385916))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1606, 0), _385916)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1606, 0), _385916)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1606, 0), _391502))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1606, 0), _391502))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1606, 0), _391502)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1606, 0), _391502)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1606, 0), _391502)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1606, 0)\=@='$COMMENT'(";; Converted:", 1606, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1606, 0), _385916)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1606, 0), _218718))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1606, 0), _218718))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1606, 0), _218718))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1606, 0), _218718))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1606, 0), _218718)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1606, 0), _218718)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1606, 0), _413822))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1606, 0), _413822))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1606, 0), _413822)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1606, 0), _413822)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1606, 0), _413822)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1606, 0)\=@='$COMMENT'(";; Converted:", 1606, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1606, 0), _218718)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1606, 0)\=@='$COMMENT'(";; Converted:", 1606, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1606, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1606, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1606, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1606, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1606, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1606, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1606, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1606, 0), _442600, [], _442602)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1606, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1606, 0), _442600, [], _442602)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1606, 0), _442600, [], _442602)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1606, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1606, 0), _442600, [], _442602)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1606, 0), _442600, [], _442602)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1606, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1606, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1606, 0), _451916, _451918)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1606, 0), '$COMMENT', [";; Converted:", 1606, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1606, 0], _453802, [], _442602)
^  Unify: (258) [user] subst_vars([";; Converted:", 1606, 0], [";; Converted:", 1606, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1606, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1606, 0], _453802, [], _442602)
^  Unify: (258) [user] subst_vars([";; Converted:", 1606, 0], [_457538|_457540], [], _442602)
^  Call: (259) [user] subst_vars(";; Converted:", _457538, [], _458478)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _457538, [], _458478)
^  Unify: (259) [user] subst_vars(";; Converted:", _457538, [], _458478)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _457538, [], _458478)
^  Unify: (259) [user] subst_vars(";; Converted:", _457538, [], _458478)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _457538, [], _458478)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1606, 0], _457540, [], _442602)
^  Unify: (259) [user] subst_vars([1606, 0], [1606, 0], [], [])
   Call: (260) [system] var([1606, 0])
^  Redo: (259) [user] subst_vars([1606, 0], _457540, [], _442602)
^  Unify: (259) [user] subst_vars([1606, 0], [_473410|_473412], [], _442602)
^  Call: (260) [user] subst_vars(1606, _473410, [], _474350)
^  Unify: (260) [user] subst_vars(1606, 1606, [], [])
   Call: (261) [system] var(1606)
^  Redo: (260) [user] subst_vars(1606, _473410, [], _474350)
^  Unify: (260) [user] subst_vars(1606, _473410, [], _474350)
   Call: (261) [system] atom(1606)
^  Redo: (260) [user] subst_vars(1606, _473410, [], _474350)
^  Unify: (260) [user] subst_vars(1606, _473410, [], _474350)
   Call: (261) [system] compound(1606)
^  Redo: (260) [user] subst_vars(1606, _473410, [], _474350)
^  Unify: (260) [user] subst_vars(1606, 1606, [], [])
^  Exit: (260) [user] subst_vars(1606, 1606, [], [])
^  Call: (260) [user] subst_vars([0], _473412, [], _442602)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _473412, [], _442602)
^  Unify: (260) [user] subst_vars([0], [_489282|_489284], [], _442602)
^  Call: (261) [user] subst_vars(0, _489282, [], _490222)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _489282, [], _490222)
^  Unify: (261) [user] subst_vars(0, _489282, [], _490222)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _489282, [], _490222)
^  Unify: (261) [user] subst_vars(0, _489282, [], _490222)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _489282, [], _490222)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _489284, [], _442602)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _489284, [], _442602)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1606, 0], [1606, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1606, 0], [";; Converted:", 1606, 0], [], [])
   Call: (258) [system] compound_name_arguments(_442600, '$COMMENT', [";; Converted:", 1606, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1606, 0), '$COMMENT', [";; Converted:", 1606, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1606, 0), '$COMMENT'(";; Converted:", 1606, 0), [], [])
   Call: (257) [system] _512640=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1606, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1606, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1606, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1606, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1606, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1606, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1606, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1606, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1606, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1615, 0, 57872, '$COMMENT'(";; Original:", 1615, 0), '$stream_position'(57872, 1615, 0, 57906)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1615, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1615, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1615, 0), _48150))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1615, 0), _48150))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1615, 0), _48150)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1615, 0), _48150)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1615, 0), _48150)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1615, 0), _48150)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1615, 0), _53762))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1615, 0), _53762))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1615, 0), _53762))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1615, 0), _53762))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1615, 0), _53762)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1615, 0), _53762)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1615, 0), _59348))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1615, 0), _59348))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1615, 0), _59348)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1615, 0), _59348)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1615, 0), _59348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1615, 0), _59348)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1615, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1615, 0), _59348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1615, 0), '$VAR'(_66808))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1615, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1615, 0), _59348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1615, 0), _59348)
   Call: (270) [system] '$COMMENT'(";; Original:", 1615, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1615, 0), _59348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1615, 0), _59348)
   Call: (270) [system] '$COMMENT'(";; Original:", 1615, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1615, 0), _59348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1615, 0), _59348)
   Call: (270) [system] '$COMMENT'(";; Original:", 1615, 0)==[_76088, _76094]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1615, 0), _59348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1615, 0), _59348)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1615, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1615, 0), _59348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1615, 0), _59348)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1615, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1615, 0), _59348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1615, 0), _59348)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1615, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1615, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1615, 0), _86290, _86292)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1615, 0), '$COMMENT', [";; Original:", 1615, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1615, 0], _90032)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1615, 0], _90032)
   Call: (271) [apply] apply:maplist_([";; Original:", 1615, 0], _90032, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1615, 0], [_92850|_92852], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _92850)
^  Unify: (272) [user] mfix_vars1(";; Original:", _92850)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _92850)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_97496))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _92850)
^  Unify: (272) [user] mfix_vars1(";; Original:", _92850)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _92850)
^  Unify: (272) [user] mfix_vars1(";; Original:", _92850)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _92850)
^  Unify: (272) [user] mfix_vars1(";; Original:", _92850)
   Call: (273) [system] ";; Original:"==[_106776, _106782]
^  Redo: (272) [user] mfix_vars1(";; Original:", _92850)
^  Unify: (272) [user] mfix_vars1(";; Original:", _92850)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _92850)
^  Unify: (272) [user] mfix_vars1(";; Original:", _92850)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _92850)
^  Unify: (272) [user] mfix_vars1(";; Original:", _92850)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _92850)
^  Unify: (272) [user] mfix_vars1(";; Original:", _92850)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _92850)
   Call: (273) [system] ";; Original:"=_92850
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1615, 0], _92852, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1615, 0], [_130848|_130850], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1615, _130848)
^  Unify: (273) [user] mfix_vars1(1615, _130848)
   Call: (274) [system] var(1615)
^  Redo: (273) [user] mfix_vars1(1615, _130848)
^  Unify: (273) [user] mfix_vars1(1615, '$VAR'(_135494))
   Call: (274) [system] atom(1615)
^  Redo: (273) [user] mfix_vars1(1615, _130848)
^  Unify: (273) [user] mfix_vars1(1615, _130848)
   Call: (274) [system] 1615==true
^  Redo: (273) [user] mfix_vars1(1615, _130848)
^  Unify: (273) [user] mfix_vars1(1615, _130848)
   Call: (274) [system] 1615==false
^  Redo: (273) [user] mfix_vars1(1615, _130848)
^  Unify: (273) [user] mfix_vars1(1615, _130848)
   Call: (274) [system] 1615==[_144774, _144780]
^  Redo: (273) [user] mfix_vars1(1615, _130848)
^  Unify: (273) [user] mfix_vars1(1615, _130848)
   Call: (274) [system] is_list(1615)
^  Redo: (273) [user] mfix_vars1(1615, _130848)
^  Unify: (273) [user] mfix_vars1(1615, _130848)
   Call: (274) [system] string(1615)
^  Redo: (273) [user] mfix_vars1(1615, _130848)
^  Unify: (273) [user] mfix_vars1(1615, _130848)
   Call: (274) [system] compound(1615)
^  Redo: (273) [user] mfix_vars1(1615, _130848)
^  Unify: (273) [user] mfix_vars1(1615, _130848)
^  Call: (274) [user] symbol(1615)
^  Unify: (274) [user] symbol(1615)
   Call: (275) [system] atom(1615)
   Fail: (275) [system] atom(1615)
^  Fail: (274) [user] symbol(1615)
^  Redo: (273) [user] mfix_vars1(1615, _130848)
   Call: (274) [system] 1615=_130848
   Exit: (274) [system] 1615=1615
^  Exit: (273) [user] mfix_vars1(1615, 1615)
   Call: (273) [apply] apply:maplist_([0], _130850, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_165174|_165176], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _165174)
^  Unify: (274) [user] mfix_vars1(0, _165174)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _165174)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_169820))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _165174)
^  Unify: (274) [user] mfix_vars1(0, _165174)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _165174)
^  Unify: (274) [user] mfix_vars1(0, _165174)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _165174)
^  Unify: (274) [user] mfix_vars1(0, _165174)
   Call: (275) [system] 0==[_179100, _179106]
^  Redo: (274) [user] mfix_vars1(0, _165174)
^  Unify: (274) [user] mfix_vars1(0, _165174)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _165174)
^  Unify: (274) [user] mfix_vars1(0, _165174)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _165174)
^  Unify: (274) [user] mfix_vars1(0, _165174)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _165174)
^  Unify: (274) [user] mfix_vars1(0, _165174)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _165174)
   Call: (275) [system] 0=_165174
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _165176, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1615, 0], [1615, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1615, 0], [";; Original:", 1615, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1615, 0], [";; Original:", 1615, 0])
   Call: (270) [system] compound_name_arguments(_59348, '$COMMENT', [";; Original:", 1615, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1615, 0), '$COMMENT', [";; Original:", 1615, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1615, 0)\=@='$COMMENT'(";; Original:", 1615, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1615, 0), _53762)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1615, 0), _215348))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1615, 0), _215348))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1615, 0), _215348))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1615, 0), _215348))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1615, 0), _215348)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1615, 0), _215348)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1615, 0), _220934))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1615, 0), _220934))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1615, 0), _220934)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1615, 0), _220934)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1615, 0), _220934)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1615, 0)\=@='$COMMENT'(";; Original:", 1615, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1615, 0), _215348)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1615, 0), _48150))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1615, 0), _48150))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1615, 0), _48150))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1615, 0), _48150))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1615, 0), _48150)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1615, 0), _48150)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1615, 0), _243254))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1615, 0), _243254))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1615, 0), _243254)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1615, 0), _243254)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1615, 0), _243254)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1615, 0)\=@='$COMMENT'(";; Original:", 1615, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1615, 0), _48150)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1615, 0)\=@='$COMMENT'(";; Original:", 1615, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1615, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1615, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1615, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1615, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1615, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1615, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1615, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1615, 0), _272032, [], _272034)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1615, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1615, 0), _272032, [], _272034)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1615, 0), _272032, [], _272034)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1615, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1615, 0), _272032, [], _272034)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1615, 0), _272032, [], _272034)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1615, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1615, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1615, 0), _281348, _281350)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1615, 0), '$COMMENT', [";; Original:", 1615, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1615, 0], _283234, [], _272034)
^  Unify: (258) [user] subst_vars([";; Original:", 1615, 0], [";; Original:", 1615, 0], [], [])
   Call: (259) [system] var([";; Original:", 1615, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1615, 0], _283234, [], _272034)
^  Unify: (258) [user] subst_vars([";; Original:", 1615, 0], [_286970|_286972], [], _272034)
^  Call: (259) [user] subst_vars(";; Original:", _286970, [], _287910)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _286970, [], _287910)
^  Unify: (259) [user] subst_vars(";; Original:", _286970, [], _287910)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _286970, [], _287910)
^  Unify: (259) [user] subst_vars(";; Original:", _286970, [], _287910)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _286970, [], _287910)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1615, 0], _286972, [], _272034)
^  Unify: (259) [user] subst_vars([1615, 0], [1615, 0], [], [])
   Call: (260) [system] var([1615, 0])
^  Redo: (259) [user] subst_vars([1615, 0], _286972, [], _272034)
^  Unify: (259) [user] subst_vars([1615, 0], [_302842|_302844], [], _272034)
^  Call: (260) [user] subst_vars(1615, _302842, [], _303782)
^  Unify: (260) [user] subst_vars(1615, 1615, [], [])
   Call: (261) [system] var(1615)
^  Redo: (260) [user] subst_vars(1615, _302842, [], _303782)
^  Unify: (260) [user] subst_vars(1615, _302842, [], _303782)
   Call: (261) [system] atom(1615)
^  Redo: (260) [user] subst_vars(1615, _302842, [], _303782)
^  Unify: (260) [user] subst_vars(1615, _302842, [], _303782)
   Call: (261) [system] compound(1615)
^  Redo: (260) [user] subst_vars(1615, _302842, [], _303782)
^  Unify: (260) [user] subst_vars(1615, 1615, [], [])
^  Exit: (260) [user] subst_vars(1615, 1615, [], [])
^  Call: (260) [user] subst_vars([0], _302844, [], _272034)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _302844, [], _272034)
^  Unify: (260) [user] subst_vars([0], [_318714|_318716], [], _272034)
^  Call: (261) [user] subst_vars(0, _318714, [], _319654)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _318714, [], _319654)
^  Unify: (261) [user] subst_vars(0, _318714, [], _319654)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _318714, [], _319654)
^  Unify: (261) [user] subst_vars(0, _318714, [], _319654)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _318714, [], _319654)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _318716, [], _272034)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _318716, [], _272034)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1615, 0], [1615, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1615, 0], [";; Original:", 1615, 0], [], [])
   Call: (258) [system] compound_name_arguments(_272032, '$COMMENT', [";; Original:", 1615, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1615, 0), '$COMMENT', [";; Original:", 1615, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1615, 0), '$COMMENT'(";; Original:", 1615, 0), [], [])
   Call: (257) [system] _342072=metta_file_buffer(+, '$COMMENT'(";; Original:", 1615, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1615, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1615, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1615, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1615, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1615, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1615, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1615, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1615, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1616, 0, 57885, '$COMMENT'(";; #[test]", 1616, 0), '$stream_position'(57885, 1616, 0, 57919)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1616, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1616, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; #[test]", 1616, 0), _394790))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 1616, 0), _394790))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; #[test]", 1616, 0), _394790)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 1616, 0), _394790)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1616, 0), _394790)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1616, 0), _394790)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; #[test]", 1616, 0), _400402))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1616, 0), _400402))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1616, 0), _400402))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1616, 0), _400402))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1616, 0), _400402)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1616, 0), _400402)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; #[test]", 1616, 0), _405988))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 1616, 0), _405988))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; #[test]", 1616, 0), _405988)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 1616, 0), _405988)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1616, 0), _405988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1616, 0), _405988)
   Call: (270) [system] var('$COMMENT'(";; #[test]", 1616, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1616, 0), _405988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1616, 0), '$VAR'(_413448))
   Call: (270) [system] atom('$COMMENT'(";; #[test]", 1616, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1616, 0), _405988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1616, 0), _405988)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1616, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1616, 0), _405988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1616, 0), _405988)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1616, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1616, 0), _405988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1616, 0), _405988)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1616, 0)==[_422728, _422734]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1616, 0), _405988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1616, 0), _405988)
   Call: (270) [system] is_list('$COMMENT'(";; #[test]", 1616, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1616, 0), _405988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1616, 0), _405988)
   Call: (270) [system] string('$COMMENT'(";; #[test]", 1616, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1616, 0), _405988)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1616, 0), _405988)
   Call: (270) [system] compound('$COMMENT'(";; #[test]", 1616, 0))
   Exit: (270) [system] compound('$COMMENT'(";; #[test]", 1616, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1616, 0), _432930, _432932)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1616, 0), '$COMMENT', [";; #[test]", 1616, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; #[test]", 1616, 0], _436672)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 1616, 0], _436672)
   Call: (271) [apply] apply:maplist_([";; #[test]", 1616, 0], _436672, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; #[test]", 1616, 0], [_439490|_439492], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; #[test]", _439490)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _439490)
   Call: (273) [system] var(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _439490)
^  Unify: (272) [user] mfix_vars1(";; #[test]", '$VAR'(_444136))
   Call: (273) [system] atom(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _439490)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _439490)
   Call: (273) [system] ";; #[test]"==true
^  Redo: (272) [user] mfix_vars1(";; #[test]", _439490)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _439490)
   Call: (273) [system] ";; #[test]"==false
^  Redo: (272) [user] mfix_vars1(";; #[test]", _439490)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _439490)
   Call: (273) [system] ";; #[test]"==[_453416, _453422]
^  Redo: (272) [user] mfix_vars1(";; #[test]", _439490)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _439490)
   Call: (273) [system] is_list(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _439490)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _439490)
   Call: (273) [system] string(";; #[test]")
   Exit: (273) [system] string(";; #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; #[test]", _439490)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _439490)
   Call: (273) [system] compound(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _439490)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _439490)
^  Call: (273) [user] symbol(";; #[test]")
^  Unify: (273) [user] symbol(";; #[test]")
   Call: (274) [system] atom(";; #[test]")
   Fail: (274) [system] atom(";; #[test]")
^  Fail: (273) [user] symbol(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _439490)
   Call: (273) [system] ";; #[test]"=_439490
   Exit: (273) [system] ";; #[test]"=";; #[test]"
^  Exit: (272) [user] mfix_vars1(";; #[test]", ";; #[test]")
   Call: (272) [apply] apply:maplist_([1616, 0], _439492, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1616, 0], [_477488|_477490], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1616, _477488)
^  Unify: (273) [user] mfix_vars1(1616, _477488)
   Call: (274) [system] var(1616)
^  Redo: (273) [user] mfix_vars1(1616, _477488)
^  Unify: (273) [user] mfix_vars1(1616, '$VAR'(_482134))
   Call: (274) [system] atom(1616)
^  Redo: (273) [user] mfix_vars1(1616, _477488)
^  Unify: (273) [user] mfix_vars1(1616, _477488)
   Call: (274) [system] 1616==true
^  Redo: (273) [user] mfix_vars1(1616, _477488)
^  Unify: (273) [user] mfix_vars1(1616, _477488)
   Call: (274) [system] 1616==false
^  Redo: (273) [user] mfix_vars1(1616, _477488)
^  Unify: (273) [user] mfix_vars1(1616, _477488)
   Call: (274) [system] 1616==[_491414, _491420]
^  Redo: (273) [user] mfix_vars1(1616, _477488)
^  Unify: (273) [user] mfix_vars1(1616, _477488)
   Call: (274) [system] is_list(1616)
^  Redo: (273) [user] mfix_vars1(1616, _477488)
^  Unify: (273) [user] mfix_vars1(1616, _477488)
   Call: (274) [system] string(1616)
^  Redo: (273) [user] mfix_vars1(1616, _477488)
^  Unify: (273) [user] mfix_vars1(1616, _477488)
   Call: (274) [system] compound(1616)
^  Redo: (273) [user] mfix_vars1(1616, _477488)
^  Unify: (273) [user] mfix_vars1(1616, _477488)
^  Call: (274) [user] symbol(1616)
^  Unify: (274) [user] symbol(1616)
   Call: (275) [system] atom(1616)
   Fail: (275) [system] atom(1616)
^  Fail: (274) [user] symbol(1616)
^  Redo: (273) [user] mfix_vars1(1616, _477488)
   Call: (274) [system] 1616=_477488
   Exit: (274) [system] 1616=1616
^  Exit: (273) [user] mfix_vars1(1616, 1616)
   Call: (273) [apply] apply:maplist_([0], _477490, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_511814|_511816], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _511814)
^  Unify: (274) [user] mfix_vars1(0, _511814)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _511814)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_516460))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _511814)
^  Unify: (274) [user] mfix_vars1(0, _511814)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _511814)
^  Unify: (274) [user] mfix_vars1(0, _511814)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _6036)
^  Unify: (274) [user] mfix_vars1(0, _6036)
   Call: (275) [system] 0==[_7768, _7774]
^  Redo: (274) [user] mfix_vars1(0, _6036)
^  Unify: (274) [user] mfix_vars1(0, _6036)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _6036)
^  Unify: (274) [user] mfix_vars1(0, _6036)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _6036)
^  Unify: (274) [user] mfix_vars1(0, _6036)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _6036)
^  Unify: (274) [user] mfix_vars1(0, _6036)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6036)
   Call: (275) [system] 0=_6036
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6038, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1616, 0], [1616, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; #[test]", 1616, 0], [";; #[test]", 1616, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 1616, 0], [";; #[test]", 1616, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";; #[test]", 1616, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1616, 0), '$COMMENT', [";; #[test]", 1616, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1616, 0)\=@='$COMMENT'(";; #[test]", 1616, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1616, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; #[test]", 1616, 0), _44016))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1616, 0), _44016))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1616, 0), _44016))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1616, 0), _44016))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1616, 0), _44016)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1616, 0), _44016)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; #[test]", 1616, 0), _49602))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 1616, 0), _49602))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; #[test]", 1616, 0), _49602)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 1616, 0), _49602)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1616, 0), _49602)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1616, 0)\=@='$COMMENT'(";; #[test]", 1616, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1616, 0), _44016)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; #[test]", 1616, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1616, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1616, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1616, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1616, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1616, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; #[test]", 1616, 0), _71922))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 1616, 0), _71922))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; #[test]", 1616, 0), _71922)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 1616, 0), _71922)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1616, 0), _71922)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1616, 0)\=@='$COMMENT'(";; #[test]", 1616, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1616, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0)))
   Call: (261) [system] '$COMMENT'(";; #[test]", 1616, 0)\=@='$COMMENT'(";; #[test]", 1616, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1616, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1616, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1616, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1616, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1616, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1616, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1616, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1616, 0), _100700, [], _100702)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; #[test]", 1616, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1616, 0), _100700, [], _100702)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1616, 0), _100700, [], _100702)
   Call: (258) [system] atom('$COMMENT'(";; #[test]", 1616, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1616, 0), _100700, [], _100702)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1616, 0), _100700, [], _100702)
   Call: (258) [system] compound('$COMMENT'(";; #[test]", 1616, 0))
   Exit: (258) [system] compound('$COMMENT'(";; #[test]", 1616, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1616, 0), _110016, _110018)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1616, 0), '$COMMENT', [";; #[test]", 1616, 0])
^  Call: (258) [user] subst_vars([";; #[test]", 1616, 0], _111902, [], _100702)
^  Unify: (258) [user] subst_vars([";; #[test]", 1616, 0], [";; #[test]", 1616, 0], [], [])
   Call: (259) [system] var([";; #[test]", 1616, 0])
^  Redo: (258) [user] subst_vars([";; #[test]", 1616, 0], _111902, [], _100702)
^  Unify: (258) [user] subst_vars([";; #[test]", 1616, 0], [_115638|_115640], [], _100702)
^  Call: (259) [user] subst_vars(";; #[test]", _115638, [], _116578)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
   Call: (260) [system] var(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _115638, [], _116578)
^  Unify: (259) [user] subst_vars(";; #[test]", _115638, [], _116578)
   Call: (260) [system] atom(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _115638, [], _116578)
^  Unify: (259) [user] subst_vars(";; #[test]", _115638, [], _116578)
   Call: (260) [system] compound(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _115638, [], _116578)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Exit: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Call: (259) [user] subst_vars([1616, 0], _115640, [], _100702)
^  Unify: (259) [user] subst_vars([1616, 0], [1616, 0], [], [])
   Call: (260) [system] var([1616, 0])
^  Redo: (259) [user] subst_vars([1616, 0], _115640, [], _100702)
^  Unify: (259) [user] subst_vars([1616, 0], [_131510|_131512], [], _100702)
^  Call: (260) [user] subst_vars(1616, _131510, [], _132450)
^  Unify: (260) [user] subst_vars(1616, 1616, [], [])
   Call: (261) [system] var(1616)
^  Redo: (260) [user] subst_vars(1616, _131510, [], _132450)
^  Unify: (260) [user] subst_vars(1616, _131510, [], _132450)
   Call: (261) [system] atom(1616)
^  Redo: (260) [user] subst_vars(1616, _131510, [], _132450)
^  Unify: (260) [user] subst_vars(1616, _131510, [], _132450)
   Call: (261) [system] compound(1616)
^  Redo: (260) [user] subst_vars(1616, _131510, [], _132450)
^  Unify: (260) [user] subst_vars(1616, 1616, [], [])
^  Exit: (260) [user] subst_vars(1616, 1616, [], [])
^  Call: (260) [user] subst_vars([0], _131512, [], _100702)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _131512, [], _100702)
^  Unify: (260) [user] subst_vars([0], [_147382|_147384], [], _100702)
^  Call: (261) [user] subst_vars(0, _147382, [], _148322)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _147382, [], _148322)
^  Unify: (261) [user] subst_vars(0, _147382, [], _148322)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _147382, [], _148322)
^  Unify: (261) [user] subst_vars(0, _147382, [], _148322)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _147382, [], _148322)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _147384, [], _100702)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _147384, [], _100702)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1616, 0], [1616, 0], [], [])
^  Exit: (258) [user] subst_vars([";; #[test]", 1616, 0], [";; #[test]", 1616, 0], [], [])
   Call: (258) [system] compound_name_arguments(_100700, '$COMMENT', [";; #[test]", 1616, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1616, 0), '$COMMENT', [";; #[test]", 1616, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1616, 0), '$COMMENT'(";; #[test]", 1616, 0), [], [])
   Call: (257) [system] _170740=metta_file_buffer(+, '$COMMENT'(";; #[test]", 1616, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; #[test]", 1616, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; #[test]", 1616, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 1616, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 1616, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1616, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1616, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1616, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1616, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1617, 0, 57896, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$stream_position'(57896, 1617, 0, 57930)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _223464))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _223464))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _223464)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _223464)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _223464)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _223464)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _229076))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _229076))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _229076))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _229076))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _229076)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _229076)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _234662))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _234662))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _234662)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _234662)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _234662)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _234662)
   Call: (270) [system] var('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _234662)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$VAR'(_242122))
   Call: (270) [system] atom('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _234662)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _234662)
   Call: (270) [system] '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _234662)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _234662)
   Call: (270) [system] '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _234662)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _234662)
   Call: (270) [system] '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0)==[_251402, _251408]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _234662)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _234662)
   Call: (270) [system] is_list('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _234662)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _234662)
   Call: (270) [system] string('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _234662)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _234662)
   Call: (270) [system] compound('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
   Exit: (270) [system] compound('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _261604, _261606)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT', [";; fn test_get_doc_gnd_func() {", 1617, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; fn test_get_doc_gnd_func() {", 1617, 0], _265346)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn test_get_doc_gnd_func() {", 1617, 0], _265346)
   Call: (271) [apply] apply:maplist_([";; fn test_get_doc_gnd_func() {", 1617, 0], _265346, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; fn test_get_doc_gnd_func() {", 1617, 0], [_268164|_268166], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; fn test_get_doc_gnd_func() {", _268164)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_gnd_func() {", _268164)
   Call: (273) [system] var(";; fn test_get_doc_gnd_func() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_gnd_func() {", _268164)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_gnd_func() {", '$VAR'(_272810))
   Call: (273) [system] atom(";; fn test_get_doc_gnd_func() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_gnd_func() {", _268164)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_gnd_func() {", _268164)
   Call: (273) [system] ";; fn test_get_doc_gnd_func() {"==true
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_gnd_func() {", _268164)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_gnd_func() {", _268164)
   Call: (273) [system] ";; fn test_get_doc_gnd_func() {"==false
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_gnd_func() {", _268164)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_gnd_func() {", _268164)
   Call: (273) [system] ";; fn test_get_doc_gnd_func() {"==[_282090, _282096]
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_gnd_func() {", _268164)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_gnd_func() {", _268164)
   Call: (273) [system] is_list(";; fn test_get_doc_gnd_func() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_gnd_func() {", _268164)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_gnd_func() {", _268164)
   Call: (273) [system] string(";; fn test_get_doc_gnd_func() {")
   Exit: (273) [system] string(";; fn test_get_doc_gnd_func() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_gnd_func() {", _268164)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_gnd_func() {", _268164)
   Call: (273) [system] compound(";; fn test_get_doc_gnd_func() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_gnd_func() {", _268164)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_gnd_func() {", _268164)
^  Call: (273) [user] symbol(";; fn test_get_doc_gnd_func() {")
^  Unify: (273) [user] symbol(";; fn test_get_doc_gnd_func() {")
   Call: (274) [system] atom(";; fn test_get_doc_gnd_func() {")
   Fail: (274) [system] atom(";; fn test_get_doc_gnd_func() {")
^  Fail: (273) [user] symbol(";; fn test_get_doc_gnd_func() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_gnd_func() {", _268164)
   Call: (273) [system] ";; fn test_get_doc_gnd_func() {"=_268164
   Exit: (273) [system] ";; fn test_get_doc_gnd_func() {"=";; fn test_get_doc_gnd_func() {"
^  Exit: (272) [user] mfix_vars1(";; fn test_get_doc_gnd_func() {", ";; fn test_get_doc_gnd_func() {")
   Call: (272) [apply] apply:maplist_([1617, 0], _268166, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1617, 0], [_306162|_306164], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1617, _306162)
^  Unify: (273) [user] mfix_vars1(1617, _306162)
   Call: (274) [system] var(1617)
^  Redo: (273) [user] mfix_vars1(1617, _306162)
^  Unify: (273) [user] mfix_vars1(1617, '$VAR'(_310808))
   Call: (274) [system] atom(1617)
^  Redo: (273) [user] mfix_vars1(1617, _306162)
^  Unify: (273) [user] mfix_vars1(1617, _306162)
   Call: (274) [system] 1617==true
^  Redo: (273) [user] mfix_vars1(1617, _306162)
^  Unify: (273) [user] mfix_vars1(1617, _306162)
   Call: (274) [system] 1617==false
^  Redo: (273) [user] mfix_vars1(1617, _306162)
^  Unify: (273) [user] mfix_vars1(1617, _306162)
   Call: (274) [system] 1617==[_320088, _320094]
^  Redo: (273) [user] mfix_vars1(1617, _306162)
^  Unify: (273) [user] mfix_vars1(1617, _306162)
   Call: (274) [system] is_list(1617)
^  Redo: (273) [user] mfix_vars1(1617, _306162)
^  Unify: (273) [user] mfix_vars1(1617, _306162)
   Call: (274) [system] string(1617)
^  Redo: (273) [user] mfix_vars1(1617, _306162)
^  Unify: (273) [user] mfix_vars1(1617, _306162)
   Call: (274) [system] compound(1617)
^  Redo: (273) [user] mfix_vars1(1617, _306162)
^  Unify: (273) [user] mfix_vars1(1617, _306162)
^  Call: (274) [user] symbol(1617)
^  Unify: (274) [user] symbol(1617)
   Call: (275) [system] atom(1617)
   Fail: (275) [system] atom(1617)
^  Fail: (274) [user] symbol(1617)
^  Redo: (273) [user] mfix_vars1(1617, _306162)
   Call: (274) [system] 1617=_306162
   Exit: (274) [system] 1617=1617
^  Exit: (273) [user] mfix_vars1(1617, 1617)
   Call: (273) [apply] apply:maplist_([0], _306164, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_340488|_340490], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _340488)
^  Unify: (274) [user] mfix_vars1(0, _340488)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _340488)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_345134))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _340488)
^  Unify: (274) [user] mfix_vars1(0, _340488)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _340488)
^  Unify: (274) [user] mfix_vars1(0, _340488)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _340488)
^  Unify: (274) [user] mfix_vars1(0, _340488)
   Call: (275) [system] 0==[_354414, _354420]
^  Redo: (274) [user] mfix_vars1(0, _340488)
^  Unify: (274) [user] mfix_vars1(0, _340488)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _340488)
^  Unify: (274) [user] mfix_vars1(0, _340488)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _340488)
^  Unify: (274) [user] mfix_vars1(0, _340488)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _340488)
^  Unify: (274) [user] mfix_vars1(0, _340488)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _340488)
   Call: (275) [system] 0=_340488
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _340490, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1617, 0], [1617, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; fn test_get_doc_gnd_func() {", 1617, 0], [";; fn test_get_doc_gnd_func() {", 1617, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn test_get_doc_gnd_func() {", 1617, 0], [";; fn test_get_doc_gnd_func() {", 1617, 0])
   Call: (270) [system] compound_name_arguments(_234662, '$COMMENT', [";; fn test_get_doc_gnd_func() {", 1617, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT', [";; fn test_get_doc_gnd_func() {", 1617, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0)\=@='$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _229076)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _390662))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _390662))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _390662))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _390662))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _390662)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _390662)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _396248))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _396248))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _396248)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _396248)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _396248)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0)\=@='$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _390662)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _223464))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _223464))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _223464))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _223464))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _223464)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _223464)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _418568))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _418568))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _418568)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _418568)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _418568)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0)\=@='$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _223464)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0)))
   Call: (261) [system] '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0)\=@='$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _447346, [], _447348)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _447346, [], _447348)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _447346, [], _447348)
   Call: (258) [system] atom('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _447346, [], _447348)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _447346, [], _447348)
   Call: (258) [system] compound('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
   Exit: (258) [system] compound('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), _456662, _456664)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT', [";; fn test_get_doc_gnd_func() {", 1617, 0])
^  Call: (258) [user] subst_vars([";; fn test_get_doc_gnd_func() {", 1617, 0], _458548, [], _447348)
^  Unify: (258) [user] subst_vars([";; fn test_get_doc_gnd_func() {", 1617, 0], [";; fn test_get_doc_gnd_func() {", 1617, 0], [], [])
   Call: (259) [system] var([";; fn test_get_doc_gnd_func() {", 1617, 0])
^  Redo: (258) [user] subst_vars([";; fn test_get_doc_gnd_func() {", 1617, 0], _458548, [], _447348)
^  Unify: (258) [user] subst_vars([";; fn test_get_doc_gnd_func() {", 1617, 0], [_462284|_462286], [], _447348)
^  Call: (259) [user] subst_vars(";; fn test_get_doc_gnd_func() {", _462284, [], _463224)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_gnd_func() {", ";; fn test_get_doc_gnd_func() {", [], [])
   Call: (260) [system] var(";; fn test_get_doc_gnd_func() {")
^  Redo: (259) [user] subst_vars(";; fn test_get_doc_gnd_func() {", _462284, [], _463224)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_gnd_func() {", _462284, [], _463224)
   Call: (260) [system] atom(";; fn test_get_doc_gnd_func() {")
^  Redo: (259) [user] subst_vars(";; fn test_get_doc_gnd_func() {", _462284, [], _463224)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_gnd_func() {", _462284, [], _463224)
   Call: (260) [system] compound(";; fn test_get_doc_gnd_func() {")
^  Redo: (259) [user] subst_vars(";; fn test_get_doc_gnd_func() {", _462284, [], _463224)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_gnd_func() {", ";; fn test_get_doc_gnd_func() {", [], [])
^  Exit: (259) [user] subst_vars(";; fn test_get_doc_gnd_func() {", ";; fn test_get_doc_gnd_func() {", [], [])
^  Call: (259) [user] subst_vars([1617, 0], _462286, [], _447348)
^  Unify: (259) [user] subst_vars([1617, 0], [1617, 0], [], [])
   Call: (260) [system] var([1617, 0])
^  Redo: (259) [user] subst_vars([1617, 0], _462286, [], _447348)
^  Unify: (259) [user] subst_vars([1617, 0], [_478156|_478158], [], _447348)
^  Call: (260) [user] subst_vars(1617, _478156, [], _479096)
^  Unify: (260) [user] subst_vars(1617, 1617, [], [])
   Call: (261) [system] var(1617)
^  Redo: (260) [user] subst_vars(1617, _478156, [], _479096)
^  Unify: (260) [user] subst_vars(1617, _478156, [], _479096)
   Call: (261) [system] atom(1617)
^  Redo: (260) [user] subst_vars(1617, _478156, [], _479096)
^  Unify: (260) [user] subst_vars(1617, _478156, [], _479096)
   Call: (261) [system] compound(1617)
^  Redo: (260) [user] subst_vars(1617, _478156, [], _479096)
^  Unify: (260) [user] subst_vars(1617, 1617, [], [])
^  Exit: (260) [user] subst_vars(1617, 1617, [], [])
^  Call: (260) [user] subst_vars([0], _478158, [], _447348)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _478158, [], _447348)
^  Unify: (260) [user] subst_vars([0], [_494028|_494030], [], _447348)
^  Call: (261) [user] subst_vars(0, _494028, [], _494968)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _494028, [], _494968)
^  Unify: (261) [user] subst_vars(0, _494028, [], _494968)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _494028, [], _494968)
^  Unify: (261) [user] subst_vars(0, _494028, [], _494968)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _494028, [], _494968)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _494030, [], _447348)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _494030, [], _447348)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1617, 0], [1617, 0], [], [])
^  Exit: (258) [user] subst_vars([";; fn test_get_doc_gnd_func() {", 1617, 0], [";; fn test_get_doc_gnd_func() {", 1617, 0], [], [])
   Call: (258) [system] compound_name_arguments(_447346, '$COMMENT', [";; fn test_get_doc_gnd_func() {", 1617, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT', [";; fn test_get_doc_gnd_func() {", 1617, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), [], [])
   Call: (257) [system] _517386=metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_gnd_func() {", 1617, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1618, 0, 57928, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$stream_position'(57928, 1618, 0, 57962)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _52352))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _52352))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _52352)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _52352)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _52352)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _52352)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _57964))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _57964))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _57964))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _57964))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _57964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _57964)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _63550))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _63550))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _63550)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _63550)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _63550)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _63550)
   Call: (270) [system] var('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _63550)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$VAR'(_71010))
   Call: (270) [system] atom('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _63550)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _63550)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _63550)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _63550)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _63550)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _63550)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0)==[_80290, _80296]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _63550)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _63550)
   Call: (270) [system] is_list('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _63550)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _63550)
   Call: (270) [system] string('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _63550)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _63550)
   Call: (270) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _90492, _90494)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0], _94234)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0], _94234)
   Call: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0], _94234, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0], [_97052|_97054], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _97052)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _97052)
   Call: (273) [system] var(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _97052)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", '$VAR'(_101698))
   Call: (273) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _97052)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _97052)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==true
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _97052)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _97052)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==false
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _97052)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _97052)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==[_110978, _110984]
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _97052)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _97052)
   Call: (273) [system] is_list(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _97052)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _97052)
   Call: (273) [system] string(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Exit: (273) [system] string(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _97052)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _97052)
   Call: (273) [system] compound(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _97052)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _97052)
^  Call: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Unify: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (274) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Fail: (274) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Fail: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _97052)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"=_97052
   Exit: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"=";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"
^  Exit: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (272) [apply] apply:maplist_([1618, 0], _97054, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1618, 0], [_135050|_135052], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1618, _135050)
^  Unify: (273) [user] mfix_vars1(1618, _135050)
   Call: (274) [system] var(1618)
^  Redo: (273) [user] mfix_vars1(1618, _135050)
^  Unify: (273) [user] mfix_vars1(1618, '$VAR'(_139696))
   Call: (274) [system] atom(1618)
^  Redo: (273) [user] mfix_vars1(1618, _135050)
^  Unify: (273) [user] mfix_vars1(1618, _135050)
   Call: (274) [system] 1618==true
^  Redo: (273) [user] mfix_vars1(1618, _135050)
^  Unify: (273) [user] mfix_vars1(1618, _135050)
   Call: (274) [system] 1618==false
^  Redo: (273) [user] mfix_vars1(1618, _135050)
^  Unify: (273) [user] mfix_vars1(1618, _135050)
   Call: (274) [system] 1618==[_148976, _148982]
^  Redo: (273) [user] mfix_vars1(1618, _135050)
^  Unify: (273) [user] mfix_vars1(1618, _135050)
   Call: (274) [system] is_list(1618)
^  Redo: (273) [user] mfix_vars1(1618, _135050)
^  Unify: (273) [user] mfix_vars1(1618, _135050)
   Call: (274) [system] string(1618)
^  Redo: (273) [user] mfix_vars1(1618, _135050)
^  Unify: (273) [user] mfix_vars1(1618, _135050)
   Call: (274) [system] compound(1618)
^  Redo: (273) [user] mfix_vars1(1618, _135050)
^  Unify: (273) [user] mfix_vars1(1618, _135050)
^  Call: (274) [user] symbol(1618)
^  Unify: (274) [user] symbol(1618)
   Call: (275) [system] atom(1618)
   Fail: (275) [system] atom(1618)
^  Fail: (274) [user] symbol(1618)
^  Redo: (273) [user] mfix_vars1(1618, _135050)
   Call: (274) [system] 1618=_135050
   Exit: (274) [system] 1618=1618
^  Exit: (273) [user] mfix_vars1(1618, 1618)
   Call: (273) [apply] apply:maplist_([0], _135052, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_169376|_169378], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _169376)
^  Unify: (274) [user] mfix_vars1(0, _169376)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _169376)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_174022))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _169376)
^  Unify: (274) [user] mfix_vars1(0, _169376)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _169376)
^  Unify: (274) [user] mfix_vars1(0, _169376)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _169376)
^  Unify: (274) [user] mfix_vars1(0, _169376)
   Call: (275) [system] 0==[_183302, _183308]
^  Redo: (274) [user] mfix_vars1(0, _169376)
^  Unify: (274) [user] mfix_vars1(0, _169376)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _169376)
^  Unify: (274) [user] mfix_vars1(0, _169376)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _169376)
^  Unify: (274) [user] mfix_vars1(0, _169376)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _169376)
^  Unify: (274) [user] mfix_vars1(0, _169376)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _169376)
   Call: (275) [system] 0=_169376
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _169378, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1618, 0], [1618, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0])
   Call: (270) [system] compound_name_arguments(_63550, '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _57964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _219550))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _219550))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _219550))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _219550))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _219550)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _219550)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _225136))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _225136))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _225136)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _225136)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _225136)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _219550)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _52352))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _52352))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _52352))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _52352))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _52352)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _52352)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _247456))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _247456))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _247456)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _247456)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _247456)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _52352)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0)))
   Call: (261) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _276234, [], _276236)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _276234, [], _276236)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _276234, [], _276236)
   Call: (258) [system] atom('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _276234, [], _276236)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _276234, [], _276236)
   Call: (258) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), _285550, _285552)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0])
^  Call: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0], _287436, [], _276236)
^  Unify: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0], [], [])
   Call: (259) [system] var([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0])
^  Redo: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0], _287436, [], _276236)
^  Unify: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0], [_291172|_291174], [], _276236)
^  Call: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _291172, [], _292112)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
   Call: (260) [system] var(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _291172, [], _292112)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _291172, [], _292112)
   Call: (260) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _291172, [], _292112)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _291172, [], _292112)
   Call: (260) [system] compound(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _291172, [], _292112)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Exit: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Call: (259) [user] subst_vars([1618, 0], _291174, [], _276236)
^  Unify: (259) [user] subst_vars([1618, 0], [1618, 0], [], [])
   Call: (260) [system] var([1618, 0])
^  Redo: (259) [user] subst_vars([1618, 0], _291174, [], _276236)
^  Unify: (259) [user] subst_vars([1618, 0], [_307044|_307046], [], _276236)
^  Call: (260) [user] subst_vars(1618, _307044, [], _307984)
^  Unify: (260) [user] subst_vars(1618, 1618, [], [])
   Call: (261) [system] var(1618)
^  Redo: (260) [user] subst_vars(1618, _307044, [], _307984)
^  Unify: (260) [user] subst_vars(1618, _307044, [], _307984)
   Call: (261) [system] atom(1618)
^  Redo: (260) [user] subst_vars(1618, _307044, [], _307984)
^  Unify: (260) [user] subst_vars(1618, _307044, [], _307984)
   Call: (261) [system] compound(1618)
^  Redo: (260) [user] subst_vars(1618, _307044, [], _307984)
^  Unify: (260) [user] subst_vars(1618, 1618, [], [])
^  Exit: (260) [user] subst_vars(1618, 1618, [], [])
^  Call: (260) [user] subst_vars([0], _307046, [], _276236)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _307046, [], _276236)
^  Unify: (260) [user] subst_vars([0], [_322916|_322918], [], _276236)
^  Call: (261) [user] subst_vars(0, _322916, [], _323856)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _322916, [], _323856)
^  Unify: (261) [user] subst_vars(0, _322916, [], _323856)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _322916, [], _323856)
^  Unify: (261) [user] subst_vars(0, _322916, [], _323856)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _322916, [], _323856)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _322918, [], _276236)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _322918, [], _276236)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1618, 0], [1618, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0], [], [])
   Call: (258) [system] compound_name_arguments(_276234, '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), [], [])
   Call: (257) [system] _346274=metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1618, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1619, 0, 57989, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$stream_position'(57989, 1619, 0, 58023)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _398998))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _398998))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _398998)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _398998)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _398998)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _398998)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _404610))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _404610))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _404610))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _404610))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _404610)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _404610)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _410196))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _410196))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _410196)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _410196)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _410196)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _410196)
   Call: (270) [system] var('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _410196)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$VAR'(_417656))
   Call: (270) [system] atom('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _410196)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _410196)
   Call: (270) [system] '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _410196)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _410196)
   Call: (270) [system] '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _410196)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _410196)
   Call: (270) [system] '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0)==[_426936, _426942]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _410196)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _410196)
   Call: (270) [system] is_list('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _410196)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _410196)
   Call: (270) [system] string('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _410196)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _410196)
   Call: (270) [system] compound('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _437138, _437140)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT', [";;     metta.tokenizer().borrow_mut()", 1619, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     metta.tokenizer().borrow_mut()", 1619, 0], _440880)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     metta.tokenizer().borrow_mut()", 1619, 0], _440880)
   Call: (271) [apply] apply:maplist_([";;     metta.tokenizer().borrow_mut()", 1619, 0], _440880, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     metta.tokenizer().borrow_mut()", 1619, 0], [_443698|_443700], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut()", _443698)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut()", _443698)
   Call: (273) [system] var(";;     metta.tokenizer().borrow_mut()")
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut()", _443698)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut()", '$VAR'(_448344))
   Call: (273) [system] atom(";;     metta.tokenizer().borrow_mut()")
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut()", _443698)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut()", _443698)
   Call: (273) [system] ";;     metta.tokenizer().borrow_mut()"==true
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut()", _443698)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut()", _443698)
   Call: (273) [system] ";;     metta.tokenizer().borrow_mut()"==false
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut()", _443698)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut()", _443698)
   Call: (273) [system] ";;     metta.tokenizer().borrow_mut()"==[_457624, _457630]
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut()", _443698)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut()", _443698)
   Call: (273) [system] is_list(";;     metta.tokenizer().borrow_mut()")
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut()", _443698)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut()", _443698)
   Call: (273) [system] string(";;     metta.tokenizer().borrow_mut()")
   Exit: (273) [system] string(";;     metta.tokenizer().borrow_mut()")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut()", _443698)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut()", _443698)
   Call: (273) [system] compound(";;     metta.tokenizer().borrow_mut()")
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut()", _443698)
^  Unify: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut()", _443698)
^  Call: (273) [user] symbol(";;     metta.tokenizer().borrow_mut()")
^  Unify: (273) [user] symbol(";;     metta.tokenizer().borrow_mut()")
   Call: (274) [system] atom(";;     metta.tokenizer().borrow_mut()")
   Fail: (274) [system] atom(";;     metta.tokenizer().borrow_mut()")
^  Fail: (273) [user] symbol(";;     metta.tokenizer().borrow_mut()")
^  Redo: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut()", _443698)
   Call: (273) [system] ";;     metta.tokenizer().borrow_mut()"=_443698
   Exit: (273) [system] ";;     metta.tokenizer().borrow_mut()"=";;     metta.tokenizer().borrow_mut()"
^  Exit: (272) [user] mfix_vars1(";;     metta.tokenizer().borrow_mut()", ";;     metta.tokenizer().borrow_mut()")
   Call: (272) [apply] apply:maplist_([1619, 0], _443700, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1619, 0], [_481696|_481698], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1619, _481696)
^  Unify: (273) [user] mfix_vars1(1619, _481696)
   Call: (274) [system] var(1619)
^  Redo: (273) [user] mfix_vars1(1619, _481696)
^  Unify: (273) [user] mfix_vars1(1619, '$VAR'(_486342))
   Call: (274) [system] atom(1619)
^  Redo: (273) [user] mfix_vars1(1619, _481696)
^  Unify: (273) [user] mfix_vars1(1619, _481696)
   Call: (274) [system] 1619==true
^  Redo: (273) [user] mfix_vars1(1619, _481696)
^  Unify: (273) [user] mfix_vars1(1619, _481696)
   Call: (274) [system] 1619==false
^  Redo: (273) [user] mfix_vars1(1619, _481696)
^  Unify: (273) [user] mfix_vars1(1619, _481696)
   Call: (274) [system] 1619==[_495622, _495628]
^  Redo: (273) [user] mfix_vars1(1619, _481696)
^  Unify: (273) [user] mfix_vars1(1619, _481696)
   Call: (274) [system] is_list(1619)
^  Redo: (273) [user] mfix_vars1(1619, _481696)
^  Unify: (273) [user] mfix_vars1(1619, _481696)
   Call: (274) [system] string(1619)
^  Redo: (273) [user] mfix_vars1(1619, _481696)
^  Unify: (273) [user] mfix_vars1(1619, _481696)
   Call: (274) [system] compound(1619)
^  Redo: (273) [user] mfix_vars1(1619, _481696)
^  Unify: (273) [user] mfix_vars1(1619, _481696)
^  Call: (274) [user] symbol(1619)
^  Unify: (274) [user] symbol(1619)
   Call: (275) [system] atom(1619)
   Fail: (275) [system] atom(1619)
^  Fail: (274) [user] symbol(1619)
^  Redo: (273) [user] mfix_vars1(1619, _481696)
   Call: (274) [system] 1619=_481696
   Exit: (274) [system] 1619=1619
^  Exit: (273) [user] mfix_vars1(1619, 1619)
   Call: (273) [apply] apply:maplist_([0], _481698, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_516022|_516024], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _516022)
^  Unify: (274) [user] mfix_vars1(0, _516022)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _516022)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_520668))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _516022)
^  Unify: (274) [user] mfix_vars1(0, _6042)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _6042)
^  Unify: (274) [user] mfix_vars1(0, _6042)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _6042)
^  Unify: (274) [user] mfix_vars1(0, _6042)
   Call: (275) [system] 0==[_12046, _12052]
^  Redo: (274) [user] mfix_vars1(0, _6042)
^  Unify: (274) [user] mfix_vars1(0, _6042)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _6042)
^  Unify: (274) [user] mfix_vars1(0, _6042)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _6042)
^  Unify: (274) [user] mfix_vars1(0, _6042)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _6042)
^  Unify: (274) [user] mfix_vars1(0, _6042)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6042)
   Call: (275) [system] 0=_6042
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6044, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1619, 0], [1619, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     metta.tokenizer().borrow_mut()", 1619, 0], [";;     metta.tokenizer().borrow_mut()", 1619, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     metta.tokenizer().borrow_mut()", 1619, 0], [";;     metta.tokenizer().borrow_mut()", 1619, 0])
   Call: (270) [system] compound_name_arguments(_5984, '$COMMENT', [";;     metta.tokenizer().borrow_mut()", 1619, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT', [";;     metta.tokenizer().borrow_mut()", 1619, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0)))
   Call: (267) [system] '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0)\=@='$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _5970)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _48294))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _48294))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _48294))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _48294))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _48294)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _48294)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _53880))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _53880))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _53880)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _53880)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _53880)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0)))
   Call: (267) [system] '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0)\=@='$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _48294)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _76200))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _76200))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _76200)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _76200)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _76200)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0)))
   Call: (267) [system] '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0)\=@='$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0)))
   Call: (261) [system] '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0)\=@='$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _104978, [], _104980)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _104978, [], _104980)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _104978, [], _104980)
   Call: (258) [system] atom('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _104978, [], _104980)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _104978, [], _104980)
   Call: (258) [system] compound('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), _114294, _114296)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT', [";;     metta.tokenizer().borrow_mut()", 1619, 0])
^  Call: (258) [user] subst_vars([";;     metta.tokenizer().borrow_mut()", 1619, 0], _116180, [], _104980)
^  Unify: (258) [user] subst_vars([";;     metta.tokenizer().borrow_mut()", 1619, 0], [";;     metta.tokenizer().borrow_mut()", 1619, 0], [], [])
   Call: (259) [system] var([";;     metta.tokenizer().borrow_mut()", 1619, 0])
^  Redo: (258) [user] subst_vars([";;     metta.tokenizer().borrow_mut()", 1619, 0], _116180, [], _104980)
^  Unify: (258) [user] subst_vars([";;     metta.tokenizer().borrow_mut()", 1619, 0], [_119916|_119918], [], _104980)
^  Call: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut()", _119916, [], _120856)
^  Unify: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut()", ";;     metta.tokenizer().borrow_mut()", [], [])
   Call: (260) [system] var(";;     metta.tokenizer().borrow_mut()")
^  Redo: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut()", _119916, [], _120856)
^  Unify: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut()", _119916, [], _120856)
   Call: (260) [system] atom(";;     metta.tokenizer().borrow_mut()")
^  Redo: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut()", _119916, [], _120856)
^  Unify: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut()", _119916, [], _120856)
   Call: (260) [system] compound(";;     metta.tokenizer().borrow_mut()")
^  Redo: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut()", _119916, [], _120856)
^  Unify: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut()", ";;     metta.tokenizer().borrow_mut()", [], [])
^  Exit: (259) [user] subst_vars(";;     metta.tokenizer().borrow_mut()", ";;     metta.tokenizer().borrow_mut()", [], [])
^  Call: (259) [user] subst_vars([1619, 0], _119918, [], _104980)
^  Unify: (259) [user] subst_vars([1619, 0], [1619, 0], [], [])
   Call: (260) [system] var([1619, 0])
^  Redo: (259) [user] subst_vars([1619, 0], _119918, [], _104980)
^  Unify: (259) [user] subst_vars([1619, 0], [_135788|_135790], [], _104980)
^  Call: (260) [user] subst_vars(1619, _135788, [], _136728)
^  Unify: (260) [user] subst_vars(1619, 1619, [], [])
   Call: (261) [system] var(1619)
^  Redo: (260) [user] subst_vars(1619, _135788, [], _136728)
^  Unify: (260) [user] subst_vars(1619, _135788, [], _136728)
   Call: (261) [system] atom(1619)
^  Redo: (260) [user] subst_vars(1619, _135788, [], _136728)
^  Unify: (260) [user] subst_vars(1619, _135788, [], _136728)
   Call: (261) [system] compound(1619)
^  Redo: (260) [user] subst_vars(1619, _135788, [], _136728)
^  Unify: (260) [user] subst_vars(1619, 1619, [], [])
^  Exit: (260) [user] subst_vars(1619, 1619, [], [])
^  Call: (260) [user] subst_vars([0], _135790, [], _104980)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _135790, [], _104980)
^  Unify: (260) [user] subst_vars([0], [_151660|_151662], [], _104980)
^  Call: (261) [user] subst_vars(0, _151660, [], _152600)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _151660, [], _152600)
^  Unify: (261) [user] subst_vars(0, _151660, [], _152600)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _151660, [], _152600)
^  Unify: (261) [user] subst_vars(0, _151660, [], _152600)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _151660, [], _152600)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _151662, [], _104980)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _151662, [], _104980)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1619, 0], [1619, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     metta.tokenizer().borrow_mut()", 1619, 0], [";;     metta.tokenizer().borrow_mut()", 1619, 0], [], [])
   Call: (258) [system] compound_name_arguments(_104978, '$COMMENT', [";;     metta.tokenizer().borrow_mut()", 1619, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT', [";;     metta.tokenizer().borrow_mut()", 1619, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), [], [])
   Call: (257) [system] _175018=metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     metta.tokenizer().borrow_mut()", 1619, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1620, 0, 58027, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$stream_position'(58027, 1620, 0, 58061)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _227760))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _227760))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _227760)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _227760)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _227760)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _227760)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _233372))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _233372))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _233372))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _233372))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _233372)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _233372)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _238958))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _238958))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _238958)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _238958)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _238958)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _238958)
   Call: (270) [system] var('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _238958)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$VAR'(_246418))
   Call: (270) [system] atom('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _238958)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _238958)
   Call: (270) [system] '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _238958)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _238958)
   Call: (270) [system] '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _238958)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _238958)
   Call: (270) [system] '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0)==[_255698, _255704]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _238958)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _238958)
   Call: (270) [system] is_list('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _238958)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _238958)
   Call: (270) [system] string('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _238958)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _238958)
   Call: (270) [system] compound('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _265900, _265902)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT', [";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0], _269642)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0], _269642)
   Call: (271) [apply] apply:maplist_([";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0], _269642, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0], [_272460|_272462], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _272460)
^  Unify: (272) [user] mfix_vars1(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _272460)
   Call: (273) [system] var(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));")
^  Redo: (272) [user] mfix_vars1(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _272460)
^  Unify: (272) [user] mfix_vars1(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", '$VAR'(_277106))
   Call: (273) [system] atom(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));")
^  Redo: (272) [user] mfix_vars1(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _272460)
^  Unify: (272) [user] mfix_vars1(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _272460)
   Call: (273) [system] ";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));"==true
^  Redo: (272) [user] mfix_vars1(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _272460)
^  Unify: (272) [user] mfix_vars1(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _272460)
   Call: (273) [system] ";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));"==false
^  Redo: (272) [user] mfix_vars1(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _272460)
^  Unify: (272) [user] mfix_vars1(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _272460)
   Call: (273) [system] ";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));"==[_286386, _286392]
^  Redo: (272) [user] mfix_vars1(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _272460)
^  Unify: (272) [user] mfix_vars1(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _272460)
   Call: (273) [system] is_list(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));")
^  Redo: (272) [user] mfix_vars1(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _272460)
^  Unify: (272) [user] mfix_vars1(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _272460)
   Call: (273) [system] string(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));")
   Exit: (273) [system] string(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _272460)
^  Unify: (272) [user] mfix_vars1(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _272460)
   Call: (273) [system] compound(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));")
^  Redo: (272) [user] mfix_vars1(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _272460)
^  Unify: (272) [user] mfix_vars1(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _272460)
^  Call: (273) [user] symbol(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));")
^  Unify: (273) [user] symbol(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));")
   Call: (274) [system] atom(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));")
   Fail: (274) [system] atom(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));")
^  Fail: (273) [user] symbol(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));")
^  Redo: (272) [user] mfix_vars1(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _272460)
   Call: (273) [system] ";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));"=_272460
   Exit: (273) [system] ";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));"=";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));"
^  Exit: (272) [user] mfix_vars1(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", ";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));")
   Call: (272) [apply] apply:maplist_([1620, 0], _272462, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1620, 0], [_310458|_310460], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1620, _310458)
^  Unify: (273) [user] mfix_vars1(1620, _310458)
   Call: (274) [system] var(1620)
^  Redo: (273) [user] mfix_vars1(1620, _310458)
^  Unify: (273) [user] mfix_vars1(1620, '$VAR'(_315104))
   Call: (274) [system] atom(1620)
^  Redo: (273) [user] mfix_vars1(1620, _310458)
^  Unify: (273) [user] mfix_vars1(1620, _310458)
   Call: (274) [system] 1620==true
^  Redo: (273) [user] mfix_vars1(1620, _310458)
^  Unify: (273) [user] mfix_vars1(1620, _310458)
   Call: (274) [system] 1620==false
^  Redo: (273) [user] mfix_vars1(1620, _310458)
^  Unify: (273) [user] mfix_vars1(1620, _310458)
   Call: (274) [system] 1620==[_324384, _324390]
^  Redo: (273) [user] mfix_vars1(1620, _310458)
^  Unify: (273) [user] mfix_vars1(1620, _310458)
   Call: (274) [system] is_list(1620)
^  Redo: (273) [user] mfix_vars1(1620, _310458)
^  Unify: (273) [user] mfix_vars1(1620, _310458)
   Call: (274) [system] string(1620)
^  Redo: (273) [user] mfix_vars1(1620, _310458)
^  Unify: (273) [user] mfix_vars1(1620, _310458)
   Call: (274) [system] compound(1620)
^  Redo: (273) [user] mfix_vars1(1620, _310458)
^  Unify: (273) [user] mfix_vars1(1620, _310458)
^  Call: (274) [user] symbol(1620)
^  Unify: (274) [user] symbol(1620)
   Call: (275) [system] atom(1620)
   Fail: (275) [system] atom(1620)
^  Fail: (274) [user] symbol(1620)
^  Redo: (273) [user] mfix_vars1(1620, _310458)
   Call: (274) [system] 1620=_310458
   Exit: (274) [system] 1620=1620
^  Exit: (273) [user] mfix_vars1(1620, 1620)
   Call: (273) [apply] apply:maplist_([0], _310460, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_344784|_344786], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _344784)
^  Unify: (274) [user] mfix_vars1(0, _344784)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _344784)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_349430))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _344784)
^  Unify: (274) [user] mfix_vars1(0, _344784)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _344784)
^  Unify: (274) [user] mfix_vars1(0, _344784)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _344784)
^  Unify: (274) [user] mfix_vars1(0, _344784)
   Call: (275) [system] 0==[_358710, _358716]
^  Redo: (274) [user] mfix_vars1(0, _344784)
^  Unify: (274) [user] mfix_vars1(0, _344784)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _344784)
^  Unify: (274) [user] mfix_vars1(0, _344784)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _344784)
^  Unify: (274) [user] mfix_vars1(0, _344784)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _344784)
^  Unify: (274) [user] mfix_vars1(0, _344784)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _344784)
   Call: (275) [system] 0=_344784
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _344786, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1620, 0], [1620, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0], [";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0], [";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0])
   Call: (270) [system] compound_name_arguments(_238958, '$COMMENT', [";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT', [";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0)))
   Call: (267) [system] '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0)\=@='$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _233372)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _394958))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _394958))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _394958))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _394958))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _394958)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _394958)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _400544))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _400544))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _400544)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _400544)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _400544)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0)))
   Call: (267) [system] '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0)\=@='$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _394958)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _227760))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _227760))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _227760))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _227760))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _227760)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _227760)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _422864))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _422864))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _422864)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _422864)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _422864)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0)))
   Call: (267) [system] '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0)\=@='$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _227760)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0)))
   Call: (261) [system] '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0)\=@='$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _451642, [], _451644)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _451642, [], _451644)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _451642, [], _451644)
   Call: (258) [system] atom('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _451642, [], _451644)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _451642, [], _451644)
   Call: (258) [system] compound('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), _460958, _460960)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT', [";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0])
^  Call: (258) [user] subst_vars([";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0], _462844, [], _451644)
^  Unify: (258) [user] subst_vars([";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0], [";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0], [], [])
   Call: (259) [system] var([";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0])
^  Redo: (258) [user] subst_vars([";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0], _462844, [], _451644)
^  Unify: (258) [user] subst_vars([";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0], [_466580|_466582], [], _451644)
^  Call: (259) [user] subst_vars(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _466580, [], _467520)
^  Unify: (259) [user] subst_vars(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", ";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", [], [])
   Call: (260) [system] var(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));")
^  Redo: (259) [user] subst_vars(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _466580, [], _467520)
^  Unify: (259) [user] subst_vars(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _466580, [], _467520)
   Call: (260) [system] atom(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));")
^  Redo: (259) [user] subst_vars(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _466580, [], _467520)
^  Unify: (259) [user] subst_vars(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _466580, [], _467520)
   Call: (260) [system] compound(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));")
^  Redo: (259) [user] subst_vars(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", _466580, [], _467520)
^  Unify: (259) [user] subst_vars(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", ";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", [], [])
^  Exit: (259) [user] subst_vars(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", ";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", [], [])
^  Call: (259) [user] subst_vars([1620, 0], _466582, [], _451644)
^  Unify: (259) [user] subst_vars([1620, 0], [1620, 0], [], [])
   Call: (260) [system] var([1620, 0])
^  Redo: (259) [user] subst_vars([1620, 0], _466582, [], _451644)
^  Unify: (259) [user] subst_vars([1620, 0], [_482452|_482454], [], _451644)
^  Call: (260) [user] subst_vars(1620, _482452, [], _483392)
^  Unify: (260) [user] subst_vars(1620, 1620, [], [])
   Call: (261) [system] var(1620)
^  Redo: (260) [user] subst_vars(1620, _482452, [], _483392)
^  Unify: (260) [user] subst_vars(1620, _482452, [], _483392)
   Call: (261) [system] atom(1620)
^  Redo: (260) [user] subst_vars(1620, _482452, [], _483392)
^  Unify: (260) [user] subst_vars(1620, _482452, [], _483392)
   Call: (261) [system] compound(1620)
^  Redo: (260) [user] subst_vars(1620, _482452, [], _483392)
^  Unify: (260) [user] subst_vars(1620, 1620, [], [])
^  Exit: (260) [user] subst_vars(1620, 1620, [], [])
^  Call: (260) [user] subst_vars([0], _482454, [], _451644)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _482454, [], _451644)
^  Unify: (260) [user] subst_vars([0], [_498324|_498326], [], _451644)
^  Call: (261) [user] subst_vars(0, _498324, [], _499264)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _498324, [], _499264)
^  Unify: (261) [user] subst_vars(0, _498324, [], _499264)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _498324, [], _499264)
^  Unify: (261) [user] subst_vars(0, _498324, [], _499264)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _498324, [], _499264)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _498326, [], _451644)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _498326, [], _451644)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1620, 0], [1620, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0], [";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0], [], [])
   Call: (258) [system] compound_name_arguments(_451642, '$COMMENT', [";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT', [";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), [], [])
   Call: (257) [system] _521682=metta_file_buffer(+, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         .register_token(regex::Regex::new(r\"some-gnd-atom\").unwrap(), |_| Atom::gnd(SomeGndAtom{}));", 1620, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1621, 0, 58131, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$stream_position'(58131, 1621, 0, 58165)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _57014))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _57014))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _57014)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _57014)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _57014)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _57014)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _62626))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _62626))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _62626))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _62626))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _62626)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _62626)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _68212))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _68212))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _68212)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _68212)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _68212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _68212)
   Call: (270) [system] var('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _68212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$VAR'(_75672))
   Call: (270) [system] atom('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _68212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _68212)
   Call: (270) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _68212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _68212)
   Call: (270) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _68212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _68212)
   Call: (270) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0)==[_84952, _84958]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _68212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _68212)
   Call: (270) [system] is_list('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _68212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _68212)
   Call: (270) [system] string('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _68212)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _68212)
   Call: (270) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _95154, _95156)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1621, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     let parser = SExprParser::new(r#\"", 1621, 0], _98896)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let parser = SExprParser::new(r#\"", 1621, 0], _98896)
   Call: (271) [apply] apply:maplist_([";;     let parser = SExprParser::new(r#\"", 1621, 0], _98896, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     let parser = SExprParser::new(r#\"", 1621, 0], [_101714|_101716], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _101714)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _101714)
   Call: (273) [system] var(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _101714)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", '$VAR'(_106360))
   Call: (273) [system] atom(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _101714)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _101714)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""==true
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _101714)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _101714)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""==false
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _101714)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _101714)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""==[_115640, _115646]
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _101714)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _101714)
   Call: (273) [system] is_list(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _101714)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _101714)
   Call: (273) [system] string(";;     let parser = SExprParser::new(r#\"")
   Exit: (273) [system] string(";;     let parser = SExprParser::new(r#\"")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _101714)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _101714)
   Call: (273) [system] compound(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _101714)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _101714)
^  Call: (273) [user] symbol(";;     let parser = SExprParser::new(r#\"")
^  Unify: (273) [user] symbol(";;     let parser = SExprParser::new(r#\"")
   Call: (274) [system] atom(";;     let parser = SExprParser::new(r#\"")
   Fail: (274) [system] atom(";;     let parser = SExprParser::new(r#\"")
^  Fail: (273) [user] symbol(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _101714)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""=_101714
   Exit: (273) [system] ";;     let parser = SExprParser::new(r#\""=";;     let parser = SExprParser::new(r#\""
^  Exit: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"")
   Call: (272) [apply] apply:maplist_([1621, 0], _101716, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1621, 0], [_139712|_139714], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1621, _139712)
^  Unify: (273) [user] mfix_vars1(1621, _139712)
   Call: (274) [system] var(1621)
^  Redo: (273) [user] mfix_vars1(1621, _139712)
^  Unify: (273) [user] mfix_vars1(1621, '$VAR'(_144358))
   Call: (274) [system] atom(1621)
^  Redo: (273) [user] mfix_vars1(1621, _139712)
^  Unify: (273) [user] mfix_vars1(1621, _139712)
   Call: (274) [system] 1621==true
^  Redo: (273) [user] mfix_vars1(1621, _139712)
^  Unify: (273) [user] mfix_vars1(1621, _139712)
   Call: (274) [system] 1621==false
^  Redo: (273) [user] mfix_vars1(1621, _139712)
^  Unify: (273) [user] mfix_vars1(1621, _139712)
   Call: (274) [system] 1621==[_153638, _153644]
^  Redo: (273) [user] mfix_vars1(1621, _139712)
^  Unify: (273) [user] mfix_vars1(1621, _139712)
   Call: (274) [system] is_list(1621)
^  Redo: (273) [user] mfix_vars1(1621, _139712)
^  Unify: (273) [user] mfix_vars1(1621, _139712)
   Call: (274) [system] string(1621)
^  Redo: (273) [user] mfix_vars1(1621, _139712)
^  Unify: (273) [user] mfix_vars1(1621, _139712)
   Call: (274) [system] compound(1621)
^  Redo: (273) [user] mfix_vars1(1621, _139712)
^  Unify: (273) [user] mfix_vars1(1621, _139712)
^  Call: (274) [user] symbol(1621)
^  Unify: (274) [user] symbol(1621)
   Call: (275) [system] atom(1621)
   Fail: (275) [system] atom(1621)
^  Fail: (274) [user] symbol(1621)
^  Redo: (273) [user] mfix_vars1(1621, _139712)
   Call: (274) [system] 1621=_139712
   Exit: (274) [system] 1621=1621
^  Exit: (273) [user] mfix_vars1(1621, 1621)
   Call: (273) [apply] apply:maplist_([0], _139714, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_174038|_174040], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _174038)
^  Unify: (274) [user] mfix_vars1(0, _174038)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _174038)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_178684))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _174038)
^  Unify: (274) [user] mfix_vars1(0, _174038)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _174038)
^  Unify: (274) [user] mfix_vars1(0, _174038)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _174038)
^  Unify: (274) [user] mfix_vars1(0, _174038)
   Call: (275) [system] 0==[_187964, _187970]
^  Redo: (274) [user] mfix_vars1(0, _174038)
^  Unify: (274) [user] mfix_vars1(0, _174038)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _174038)
^  Unify: (274) [user] mfix_vars1(0, _174038)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _174038)
^  Unify: (274) [user] mfix_vars1(0, _174038)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _174038)
^  Unify: (274) [user] mfix_vars1(0, _174038)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _174038)
   Call: (275) [system] 0=_174038
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _174040, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1621, 0], [1621, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     let parser = SExprParser::new(r#\"", 1621, 0], [";;     let parser = SExprParser::new(r#\"", 1621, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let parser = SExprParser::new(r#\"", 1621, 0], [";;     let parser = SExprParser::new(r#\"", 1621, 0])
   Call: (270) [system] compound_name_arguments(_68212, '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1621, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1621, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0)))
   Call: (267) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _62626)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _224212))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _224212))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _224212))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _224212))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _224212)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _224212)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _229798))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _229798))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _229798)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _229798)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _229798)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0)))
   Call: (267) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _224212)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _57014))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _57014))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _57014))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _57014))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _57014)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _57014)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _252118))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _252118))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _252118)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _252118)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _252118)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0)))
   Call: (267) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _57014)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0)))
   Call: (261) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _280896, [], _280898)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _280896, [], _280898)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _280896, [], _280898)
   Call: (258) [system] atom('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _280896, [], _280898)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _280896, [], _280898)
   Call: (258) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), _290212, _290214)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1621, 0])
^  Call: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1621, 0], _292098, [], _280898)
^  Unify: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1621, 0], [";;     let parser = SExprParser::new(r#\"", 1621, 0], [], [])
   Call: (259) [system] var([";;     let parser = SExprParser::new(r#\"", 1621, 0])
^  Redo: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1621, 0], _292098, [], _280898)
^  Unify: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1621, 0], [_295834|_295836], [], _280898)
^  Call: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _295834, [], _296774)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"", [], [])
   Call: (260) [system] var(";;     let parser = SExprParser::new(r#\"")
^  Redo: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _295834, [], _296774)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _295834, [], _296774)
   Call: (260) [system] atom(";;     let parser = SExprParser::new(r#\"")
^  Redo: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _295834, [], _296774)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _295834, [], _296774)
   Call: (260) [system] compound(";;     let parser = SExprParser::new(r#\"")
^  Redo: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _295834, [], _296774)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"", [], [])
^  Exit: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"", [], [])
^  Call: (259) [user] subst_vars([1621, 0], _295836, [], _280898)
^  Unify: (259) [user] subst_vars([1621, 0], [1621, 0], [], [])
   Call: (260) [system] var([1621, 0])
^  Redo: (259) [user] subst_vars([1621, 0], _295836, [], _280898)
^  Unify: (259) [user] subst_vars([1621, 0], [_311706|_311708], [], _280898)
^  Call: (260) [user] subst_vars(1621, _311706, [], _312646)
^  Unify: (260) [user] subst_vars(1621, 1621, [], [])
   Call: (261) [system] var(1621)
^  Redo: (260) [user] subst_vars(1621, _311706, [], _312646)
^  Unify: (260) [user] subst_vars(1621, _311706, [], _312646)
   Call: (261) [system] atom(1621)
^  Redo: (260) [user] subst_vars(1621, _311706, [], _312646)
^  Unify: (260) [user] subst_vars(1621, _311706, [], _312646)
   Call: (261) [system] compound(1621)
^  Redo: (260) [user] subst_vars(1621, _311706, [], _312646)
^  Unify: (260) [user] subst_vars(1621, 1621, [], [])
^  Exit: (260) [user] subst_vars(1621, 1621, [], [])
^  Call: (260) [user] subst_vars([0], _311708, [], _280898)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _311708, [], _280898)
^  Unify: (260) [user] subst_vars([0], [_327578|_327580], [], _280898)
^  Call: (261) [user] subst_vars(0, _327578, [], _328518)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _327578, [], _328518)
^  Unify: (261) [user] subst_vars(0, _327578, [], _328518)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _327578, [], _328518)
^  Unify: (261) [user] subst_vars(0, _327578, [], _328518)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _327578, [], _328518)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _327580, [], _280898)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _327580, [], _280898)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1621, 0], [1621, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1621, 0], [";;     let parser = SExprParser::new(r#\"", 1621, 0], [], [])
   Call: (258) [system] compound_name_arguments(_280896, '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1621, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1621, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), [], [])
   Call: (257) [system] _350936=metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1621, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1622, 0, 58172, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$stream_position'(58172, 1622, 0, 58206)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _403658))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _403658))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _403658)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _403658)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _403658)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _403658)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _409270))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _409270))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _409270))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _409270))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _409270)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _409270)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _414856))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _414856))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _414856)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _414856)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _414856)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _414856)
   Call: (270) [system] var('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _414856)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$VAR'(_422316))
   Call: (270) [system] atom('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _414856)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _414856)
   Call: (270) [system] '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _414856)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _414856)
   Call: (270) [system] '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _414856)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _414856)
   Call: (270) [system] '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0)==[_431596, _431602]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _414856)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _414856)
   Call: (270) [system] is_list('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _414856)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _414856)
   Call: (270) [system] string('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _414856)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _414856)
   Call: (270) [system] compound('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _441798, _441800)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT', [";;         (@doc some-gnd-atom", 1622, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         (@doc some-gnd-atom", 1622, 0], _445540)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (@doc some-gnd-atom", 1622, 0], _445540)
   Call: (271) [apply] apply:maplist_([";;         (@doc some-gnd-atom", 1622, 0], _445540, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         (@doc some-gnd-atom", 1622, 0], [_448358|_448360], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         (@doc some-gnd-atom", _448358)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-gnd-atom", _448358)
   Call: (273) [system] var(";;         (@doc some-gnd-atom")
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-gnd-atom", _448358)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-gnd-atom", '$VAR'(_453004))
   Call: (273) [system] atom(";;         (@doc some-gnd-atom")
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-gnd-atom", _448358)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-gnd-atom", _448358)
   Call: (273) [system] ";;         (@doc some-gnd-atom"==true
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-gnd-atom", _448358)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-gnd-atom", _448358)
   Call: (273) [system] ";;         (@doc some-gnd-atom"==false
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-gnd-atom", _448358)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-gnd-atom", _448358)
   Call: (273) [system] ";;         (@doc some-gnd-atom"==[_462284, _462290]
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-gnd-atom", _448358)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-gnd-atom", _448358)
   Call: (273) [system] is_list(";;         (@doc some-gnd-atom")
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-gnd-atom", _448358)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-gnd-atom", _448358)
   Call: (273) [system] string(";;         (@doc some-gnd-atom")
   Exit: (273) [system] string(";;         (@doc some-gnd-atom")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-gnd-atom", _448358)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-gnd-atom", _448358)
   Call: (273) [system] compound(";;         (@doc some-gnd-atom")
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-gnd-atom", _448358)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-gnd-atom", _448358)
^  Call: (273) [user] symbol(";;         (@doc some-gnd-atom")
^  Unify: (273) [user] symbol(";;         (@doc some-gnd-atom")
   Call: (274) [system] atom(";;         (@doc some-gnd-atom")
   Fail: (274) [system] atom(";;         (@doc some-gnd-atom")
^  Fail: (273) [user] symbol(";;         (@doc some-gnd-atom")
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-gnd-atom", _448358)
   Call: (273) [system] ";;         (@doc some-gnd-atom"=_448358
   Exit: (273) [system] ";;         (@doc some-gnd-atom"=";;         (@doc some-gnd-atom"
^  Exit: (272) [user] mfix_vars1(";;         (@doc some-gnd-atom", ";;         (@doc some-gnd-atom")
   Call: (272) [apply] apply:maplist_([1622, 0], _448360, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1622, 0], [_486356|_486358], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1622, _486356)
^  Unify: (273) [user] mfix_vars1(1622, _486356)
   Call: (274) [system] var(1622)
^  Redo: (273) [user] mfix_vars1(1622, _486356)
^  Unify: (273) [user] mfix_vars1(1622, '$VAR'(_491002))
   Call: (274) [system] atom(1622)
^  Redo: (273) [user] mfix_vars1(1622, _486356)
^  Unify: (273) [user] mfix_vars1(1622, _486356)
   Call: (274) [system] 1622==true
^  Redo: (273) [user] mfix_vars1(1622, _486356)
^  Unify: (273) [user] mfix_vars1(1622, _486356)
   Call: (274) [system] 1622==false
^  Redo: (273) [user] mfix_vars1(1622, _486356)
^  Unify: (273) [user] mfix_vars1(1622, _486356)
   Call: (274) [system] 1622==[_500282, _500288]
^  Redo: (273) [user] mfix_vars1(1622, _486356)
^  Unify: (273) [user] mfix_vars1(1622, _486356)
   Call: (274) [system] is_list(1622)
^  Redo: (273) [user] mfix_vars1(1622, _486356)
^  Unify: (273) [user] mfix_vars1(1622, _486356)
   Call: (274) [system] string(1622)
^  Redo: (273) [user] mfix_vars1(1622, _486356)
^  Unify: (273) [user] mfix_vars1(1622, _486356)
   Call: (274) [system] compound(1622)
^  Redo: (273) [user] mfix_vars1(1622, _486356)
^  Unify: (273) [user] mfix_vars1(1622, _486356)
^  Call: (274) [user] symbol(1622)
^  Unify: (274) [user] symbol(1622)
   Call: (275) [system] atom(1622)
   Fail: (275) [system] atom(1622)
^  Fail: (274) [user] symbol(1622)
^  Redo: (273) [user] mfix_vars1(1622, _486356)
   Call: (274) [system] 1622=_486356
   Exit: (274) [system] 1622=1622
^  Exit: (273) [user] mfix_vars1(1622, 1622)
   Call: (273) [apply] apply:maplist_([0], _486358, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_520682|_520684], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _520682)
^  Unify: (274) [user] mfix_vars1(0, _520682)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _6040)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_7496))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _6040)
^  Unify: (274) [user] mfix_vars1(0, _6040)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _6040)
^  Unify: (274) [user] mfix_vars1(0, _6040)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _6040)
^  Unify: (274) [user] mfix_vars1(0, _6040)
   Call: (275) [system] 0==[_16776, _16782]
^  Redo: (274) [user] mfix_vars1(0, _6040)
^  Unify: (274) [user] mfix_vars1(0, _6040)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _6040)
^  Unify: (274) [user] mfix_vars1(0, _6040)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _6040)
^  Unify: (274) [user] mfix_vars1(0, _6040)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _6040)
^  Unify: (274) [user] mfix_vars1(0, _6040)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6040)
   Call: (275) [system] 0=_6040
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6042, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1622, 0], [1622, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         (@doc some-gnd-atom", 1622, 0], [";;         (@doc some-gnd-atom", 1622, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (@doc some-gnd-atom", 1622, 0], [";;         (@doc some-gnd-atom", 1622, 0])
   Call: (270) [system] compound_name_arguments(_5982, '$COMMENT', [";;         (@doc some-gnd-atom", 1622, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT', [";;         (@doc some-gnd-atom", 1622, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0)))
   Call: (267) [system] '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0)\=@='$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _5968)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _53024))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _53024))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _53024))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _53024))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _53024)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _53024)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _58610))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _58610))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _58610)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _58610)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _58610)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0)))
   Call: (267) [system] '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0)\=@='$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _53024)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _5948))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _5948))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _5948))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _5948))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _5948)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _80930))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _80930))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _80930)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _80930)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _80930)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0)))
   Call: (267) [system] '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0)\=@='$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0)))
   Call: (261) [system] '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0)\=@='$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _109708, [], _109710)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _109708, [], _109710)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _109708, [], _109710)
   Call: (258) [system] atom('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _109708, [], _109710)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _109708, [], _109710)
   Call: (258) [system] compound('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), _119024, _119026)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT', [";;         (@doc some-gnd-atom", 1622, 0])
^  Call: (258) [user] subst_vars([";;         (@doc some-gnd-atom", 1622, 0], _120910, [], _109710)
^  Unify: (258) [user] subst_vars([";;         (@doc some-gnd-atom", 1622, 0], [";;         (@doc some-gnd-atom", 1622, 0], [], [])
   Call: (259) [system] var([";;         (@doc some-gnd-atom", 1622, 0])
^  Redo: (258) [user] subst_vars([";;         (@doc some-gnd-atom", 1622, 0], _120910, [], _109710)
^  Unify: (258) [user] subst_vars([";;         (@doc some-gnd-atom", 1622, 0], [_124646|_124648], [], _109710)
^  Call: (259) [user] subst_vars(";;         (@doc some-gnd-atom", _124646, [], _125586)
^  Unify: (259) [user] subst_vars(";;         (@doc some-gnd-atom", ";;         (@doc some-gnd-atom", [], [])
   Call: (260) [system] var(";;         (@doc some-gnd-atom")
^  Redo: (259) [user] subst_vars(";;         (@doc some-gnd-atom", _124646, [], _125586)
^  Unify: (259) [user] subst_vars(";;         (@doc some-gnd-atom", _124646, [], _125586)
   Call: (260) [system] atom(";;         (@doc some-gnd-atom")
^  Redo: (259) [user] subst_vars(";;         (@doc some-gnd-atom", _124646, [], _125586)
^  Unify: (259) [user] subst_vars(";;         (@doc some-gnd-atom", _124646, [], _125586)
   Call: (260) [system] compound(";;         (@doc some-gnd-atom")
^  Redo: (259) [user] subst_vars(";;         (@doc some-gnd-atom", _124646, [], _125586)
^  Unify: (259) [user] subst_vars(";;         (@doc some-gnd-atom", ";;         (@doc some-gnd-atom", [], [])
^  Exit: (259) [user] subst_vars(";;         (@doc some-gnd-atom", ";;         (@doc some-gnd-atom", [], [])
^  Call: (259) [user] subst_vars([1622, 0], _124648, [], _109710)
^  Unify: (259) [user] subst_vars([1622, 0], [1622, 0], [], [])
   Call: (260) [system] var([1622, 0])
^  Redo: (259) [user] subst_vars([1622, 0], _124648, [], _109710)
^  Unify: (259) [user] subst_vars([1622, 0], [_140518|_140520], [], _109710)
^  Call: (260) [user] subst_vars(1622, _140518, [], _141458)
^  Unify: (260) [user] subst_vars(1622, 1622, [], [])
   Call: (261) [system] var(1622)
^  Redo: (260) [user] subst_vars(1622, _140518, [], _141458)
^  Unify: (260) [user] subst_vars(1622, _140518, [], _141458)
   Call: (261) [system] atom(1622)
^  Redo: (260) [user] subst_vars(1622, _140518, [], _141458)
^  Unify: (260) [user] subst_vars(1622, _140518, [], _141458)
   Call: (261) [system] compound(1622)
^  Redo: (260) [user] subst_vars(1622, _140518, [], _141458)
^  Unify: (260) [user] subst_vars(1622, 1622, [], [])
^  Exit: (260) [user] subst_vars(1622, 1622, [], [])
^  Call: (260) [user] subst_vars([0], _140520, [], _109710)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _140520, [], _109710)
^  Unify: (260) [user] subst_vars([0], [_156390|_156392], [], _109710)
^  Call: (261) [user] subst_vars(0, _156390, [], _157330)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _156390, [], _157330)
^  Unify: (261) [user] subst_vars(0, _156390, [], _157330)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _156390, [], _157330)
^  Unify: (261) [user] subst_vars(0, _156390, [], _157330)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _156390, [], _157330)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _156392, [], _109710)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _156392, [], _109710)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1622, 0], [1622, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         (@doc some-gnd-atom", 1622, 0], [";;         (@doc some-gnd-atom", 1622, 0], [], [])
   Call: (258) [system] compound_name_arguments(_109708, '$COMMENT', [";;         (@doc some-gnd-atom", 1622, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT', [";;         (@doc some-gnd-atom", 1622, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), [], [])
   Call: (257) [system] _179748=metta_file_buffer(+, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (@doc some-gnd-atom", 1622, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1623, 0, 58203, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$stream_position'(58203, 1623, 0, 58237)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _232472))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _232472))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _232472)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _232472)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _232472)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _232472)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _238084))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _238084))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _238084))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _238084))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _238084)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _238084)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _243670))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _243670))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _243670)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _243670)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _243670)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _243670)
   Call: (270) [system] var('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _243670)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$VAR'(_251130))
   Call: (270) [system] atom('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _243670)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _243670)
   Call: (270) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _243670)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _243670)
   Call: (270) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _243670)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _243670)
   Call: (270) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0)==[_260410, _260416]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _243670)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _243670)
   Call: (270) [system] is_list('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _243670)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _243670)
   Call: (270) [system] string('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _243670)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _243670)
   Call: (270) [system] compound('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
   Exit: (270) [system] compound('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _270612, _270614)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT', [";;           (@desc \"Test function\")", 1623, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;           (@desc \"Test function\")", 1623, 0], _274354)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@desc \"Test function\")", 1623, 0], _274354)
   Call: (271) [apply] apply:maplist_([";;           (@desc \"Test function\")", 1623, 0], _274354, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;           (@desc \"Test function\")", 1623, 0], [_277172|_277174], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _277172)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _277172)
   Call: (273) [system] var(";;           (@desc \"Test function\")")
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _277172)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", '$VAR'(_281818))
   Call: (273) [system] atom(";;           (@desc \"Test function\")")
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _277172)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _277172)
   Call: (273) [system] ";;           (@desc \"Test function\")"==true
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _277172)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _277172)
   Call: (273) [system] ";;           (@desc \"Test function\")"==false
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _277172)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _277172)
   Call: (273) [system] ";;           (@desc \"Test function\")"==[_291098, _291104]
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _277172)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _277172)
   Call: (273) [system] is_list(";;           (@desc \"Test function\")")
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _277172)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _277172)
   Call: (273) [system] string(";;           (@desc \"Test function\")")
   Exit: (273) [system] string(";;           (@desc \"Test function\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _277172)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _277172)
   Call: (273) [system] compound(";;           (@desc \"Test function\")")
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _277172)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _277172)
^  Call: (273) [user] symbol(";;           (@desc \"Test function\")")
^  Unify: (273) [user] symbol(";;           (@desc \"Test function\")")
   Call: (274) [system] atom(";;           (@desc \"Test function\")")
   Fail: (274) [system] atom(";;           (@desc \"Test function\")")
^  Fail: (273) [user] symbol(";;           (@desc \"Test function\")")
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _277172)
   Call: (273) [system] ";;           (@desc \"Test function\")"=_277172
   Exit: (273) [system] ";;           (@desc \"Test function\")"=";;           (@desc \"Test function\")"
^  Exit: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", ";;           (@desc \"Test function\")")
   Call: (272) [apply] apply:maplist_([1623, 0], _277174, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1623, 0], [_315170|_315172], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1623, _315170)
^  Unify: (273) [user] mfix_vars1(1623, _315170)
   Call: (274) [system] var(1623)
^  Redo: (273) [user] mfix_vars1(1623, _315170)
^  Unify: (273) [user] mfix_vars1(1623, '$VAR'(_319816))
   Call: (274) [system] atom(1623)
^  Redo: (273) [user] mfix_vars1(1623, _315170)
^  Unify: (273) [user] mfix_vars1(1623, _315170)
   Call: (274) [system] 1623==true
^  Redo: (273) [user] mfix_vars1(1623, _315170)
^  Unify: (273) [user] mfix_vars1(1623, _315170)
   Call: (274) [system] 1623==false
^  Redo: (273) [user] mfix_vars1(1623, _315170)
^  Unify: (273) [user] mfix_vars1(1623, _315170)
   Call: (274) [system] 1623==[_329096, _329102]
^  Redo: (273) [user] mfix_vars1(1623, _315170)
^  Unify: (273) [user] mfix_vars1(1623, _315170)
   Call: (274) [system] is_list(1623)
^  Redo: (273) [user] mfix_vars1(1623, _315170)
^  Unify: (273) [user] mfix_vars1(1623, _315170)
   Call: (274) [system] string(1623)
^  Redo: (273) [user] mfix_vars1(1623, _315170)
^  Unify: (273) [user] mfix_vars1(1623, _315170)
   Call: (274) [system] compound(1623)
^  Redo: (273) [user] mfix_vars1(1623, _315170)
^  Unify: (273) [user] mfix_vars1(1623, _315170)
^  Call: (274) [user] symbol(1623)
^  Unify: (274) [user] symbol(1623)
   Call: (275) [system] atom(1623)
   Fail: (275) [system] atom(1623)
^  Fail: (274) [user] symbol(1623)
^  Redo: (273) [user] mfix_vars1(1623, _315170)
   Call: (274) [system] 1623=_315170
   Exit: (274) [system] 1623=1623
^  Exit: (273) [user] mfix_vars1(1623, 1623)
   Call: (273) [apply] apply:maplist_([0], _315172, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_349496|_349498], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _349496)
^  Unify: (274) [user] mfix_vars1(0, _349496)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _349496)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_354142))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _349496)
^  Unify: (274) [user] mfix_vars1(0, _349496)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _349496)
^  Unify: (274) [user] mfix_vars1(0, _349496)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _349496)
^  Unify: (274) [user] mfix_vars1(0, _349496)
   Call: (275) [system] 0==[_363422, _363428]
^  Redo: (274) [user] mfix_vars1(0, _349496)
^  Unify: (274) [user] mfix_vars1(0, _349496)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _349496)
^  Unify: (274) [user] mfix_vars1(0, _349496)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _349496)
^  Unify: (274) [user] mfix_vars1(0, _349496)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _349496)
^  Unify: (274) [user] mfix_vars1(0, _349496)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _349496)
   Call: (275) [system] 0=_349496
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _349498, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1623, 0], [1623, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;           (@desc \"Test function\")", 1623, 0], [";;           (@desc \"Test function\")", 1623, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@desc \"Test function\")", 1623, 0], [";;           (@desc \"Test function\")", 1623, 0])
   Call: (270) [system] compound_name_arguments(_243670, '$COMMENT', [";;           (@desc \"Test function\")", 1623, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT', [";;           (@desc \"Test function\")", 1623, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0)\=@='$COMMENT'(";;           (@desc \"Test function\")", 1623, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _238084)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _399670))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _399670))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _399670))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _399670))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _399670)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _399670)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _405256))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _405256))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _405256)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _405256)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _405256)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0)\=@='$COMMENT'(";;           (@desc \"Test function\")", 1623, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _399670)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _232472))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _232472))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _232472))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _232472))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _232472)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _232472)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _427576))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _427576))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _427576)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _427576)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _427576)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0)\=@='$COMMENT'(";;           (@desc \"Test function\")", 1623, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _232472)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0)))
   Call: (261) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0)\=@='$COMMENT'(";;           (@desc \"Test function\")", 1623, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _456354, [], _456356)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _456354, [], _456356)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _456354, [], _456356)
   Call: (258) [system] atom('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _456354, [], _456356)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _456354, [], _456356)
   Call: (258) [system] compound('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
   Exit: (258) [system] compound('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), _465670, _465672)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT', [";;           (@desc \"Test function\")", 1623, 0])
^  Call: (258) [user] subst_vars([";;           (@desc \"Test function\")", 1623, 0], _467556, [], _456356)
^  Unify: (258) [user] subst_vars([";;           (@desc \"Test function\")", 1623, 0], [";;           (@desc \"Test function\")", 1623, 0], [], [])
   Call: (259) [system] var([";;           (@desc \"Test function\")", 1623, 0])
^  Redo: (258) [user] subst_vars([";;           (@desc \"Test function\")", 1623, 0], _467556, [], _456356)
^  Unify: (258) [user] subst_vars([";;           (@desc \"Test function\")", 1623, 0], [_471292|_471294], [], _456356)
^  Call: (259) [user] subst_vars(";;           (@desc \"Test function\")", _471292, [], _472232)
^  Unify: (259) [user] subst_vars(";;           (@desc \"Test function\")", ";;           (@desc \"Test function\")", [], [])
   Call: (260) [system] var(";;           (@desc \"Test function\")")
^  Redo: (259) [user] subst_vars(";;           (@desc \"Test function\")", _471292, [], _472232)
^  Unify: (259) [user] subst_vars(";;           (@desc \"Test function\")", _471292, [], _472232)
   Call: (260) [system] atom(";;           (@desc \"Test function\")")
^  Redo: (259) [user] subst_vars(";;           (@desc \"Test function\")", _471292, [], _472232)
^  Unify: (259) [user] subst_vars(";;           (@desc \"Test function\")", _471292, [], _472232)
   Call: (260) [system] compound(";;           (@desc \"Test function\")")
^  Redo: (259) [user] subst_vars(";;           (@desc \"Test function\")", _471292, [], _472232)
^  Unify: (259) [user] subst_vars(";;           (@desc \"Test function\")", ";;           (@desc \"Test function\")", [], [])
^  Exit: (259) [user] subst_vars(";;           (@desc \"Test function\")", ";;           (@desc \"Test function\")", [], [])
^  Call: (259) [user] subst_vars([1623, 0], _471294, [], _456356)
^  Unify: (259) [user] subst_vars([1623, 0], [1623, 0], [], [])
   Call: (260) [system] var([1623, 0])
^  Redo: (259) [user] subst_vars([1623, 0], _471294, [], _456356)
^  Unify: (259) [user] subst_vars([1623, 0], [_487164|_487166], [], _456356)
^  Call: (260) [user] subst_vars(1623, _487164, [], _488104)
^  Unify: (260) [user] subst_vars(1623, 1623, [], [])
   Call: (261) [system] var(1623)
^  Redo: (260) [user] subst_vars(1623, _487164, [], _488104)
^  Unify: (260) [user] subst_vars(1623, _487164, [], _488104)
   Call: (261) [system] atom(1623)
^  Redo: (260) [user] subst_vars(1623, _487164, [], _488104)
^  Unify: (260) [user] subst_vars(1623, _487164, [], _488104)
   Call: (261) [system] compound(1623)
^  Redo: (260) [user] subst_vars(1623, _487164, [], _488104)
^  Unify: (260) [user] subst_vars(1623, 1623, [], [])
^  Exit: (260) [user] subst_vars(1623, 1623, [], [])
^  Call: (260) [user] subst_vars([0], _487166, [], _456356)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _487166, [], _456356)
^  Unify: (260) [user] subst_vars([0], [_503036|_503038], [], _456356)
^  Call: (261) [user] subst_vars(0, _503036, [], _503976)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _503036, [], _503976)
^  Unify: (261) [user] subst_vars(0, _503036, [], _503976)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _503036, [], _503976)
^  Unify: (261) [user] subst_vars(0, _503036, [], _503976)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _503036, [], _503976)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _503038, [], _456356)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _503038, [], _456356)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1623, 0], [1623, 0], [], [])
^  Exit: (258) [user] subst_vars([";;           (@desc \"Test function\")", 1623, 0], [";;           (@desc \"Test function\")", 1623, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5944, '$COMMENT', [";;           (@desc \"Test function\")", 1623, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT', [";;           (@desc \"Test function\")", 1623, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), [], [])
   Call: (257) [system] _8466=metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1623, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1624, 0, 58240, '$COMMENT'(";;           (@params (", 1624, 0), '$stream_position'(58240, 1624, 0, 58274)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@params (", 1624, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@params (", 1624, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;           (@params (", 1624, 0), _61188))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@params (", 1624, 0), _61188))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;           (@params (", 1624, 0), _61188)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@params (", 1624, 0), _61188)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;           (@params (", 1624, 0), _61188)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;           (@params (", 1624, 0), _61188)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1624, 0), _66800))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1624, 0), _66800))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1624, 0), _66800))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1624, 0), _66800))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1624, 0), _66800)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1624, 0), _66800)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;           (@params (", 1624, 0), _72386))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@params (", 1624, 0), _72386))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;           (@params (", 1624, 0), _72386)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@params (", 1624, 0), _72386)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1624, 0), _72386)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1624, 0), _72386)
   Call: (270) [system] var('$COMMENT'(";;           (@params (", 1624, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1624, 0), _72386)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1624, 0), '$VAR'(_79846))
   Call: (270) [system] atom('$COMMENT'(";;           (@params (", 1624, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1624, 0), _72386)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1624, 0), _72386)
   Call: (270) [system] '$COMMENT'(";;           (@params (", 1624, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1624, 0), _72386)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1624, 0), _72386)
   Call: (270) [system] '$COMMENT'(";;           (@params (", 1624, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1624, 0), _72386)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1624, 0), _72386)
   Call: (270) [system] '$COMMENT'(";;           (@params (", 1624, 0)==[_89126, _89132]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1624, 0), _72386)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1624, 0), _72386)
   Call: (270) [system] is_list('$COMMENT'(";;           (@params (", 1624, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1624, 0), _72386)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1624, 0), _72386)
   Call: (270) [system] string('$COMMENT'(";;           (@params (", 1624, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1624, 0), _72386)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1624, 0), _72386)
   Call: (270) [system] compound('$COMMENT'(";;           (@params (", 1624, 0))
   Exit: (270) [system] compound('$COMMENT'(";;           (@params (", 1624, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1624, 0), _99328, _99330)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT', [";;           (@params (", 1624, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;           (@params (", 1624, 0], _103070)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@params (", 1624, 0], _103070)
   Call: (271) [apply] apply:maplist_([";;           (@params (", 1624, 0], _103070, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;           (@params (", 1624, 0], [_105888|_105890], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;           (@params (", _105888)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _105888)
   Call: (273) [system] var(";;           (@params (")
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _105888)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", '$VAR'(_110534))
   Call: (273) [system] atom(";;           (@params (")
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _105888)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _105888)
   Call: (273) [system] ";;           (@params ("==true
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _105888)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _105888)
   Call: (273) [system] ";;           (@params ("==false
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _105888)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _105888)
   Call: (273) [system] ";;           (@params ("==[_119814, _119820]
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _105888)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _105888)
   Call: (273) [system] is_list(";;           (@params (")
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _105888)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _105888)
   Call: (273) [system] string(";;           (@params (")
   Exit: (273) [system] string(";;           (@params (")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _105888)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _105888)
   Call: (273) [system] compound(";;           (@params (")
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _105888)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _105888)
^  Call: (273) [user] symbol(";;           (@params (")
^  Unify: (273) [user] symbol(";;           (@params (")
   Call: (274) [system] atom(";;           (@params (")
   Fail: (274) [system] atom(";;           (@params (")
^  Fail: (273) [user] symbol(";;           (@params (")
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _105888)
   Call: (273) [system] ";;           (@params ("=_105888
   Exit: (273) [system] ";;           (@params ("=";;           (@params ("
^  Exit: (272) [user] mfix_vars1(";;           (@params (", ";;           (@params (")
   Call: (272) [apply] apply:maplist_([1624, 0], _105890, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1624, 0], [_143886|_143888], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1624, _143886)
^  Unify: (273) [user] mfix_vars1(1624, _143886)
   Call: (274) [system] var(1624)
^  Redo: (273) [user] mfix_vars1(1624, _143886)
^  Unify: (273) [user] mfix_vars1(1624, '$VAR'(_148532))
   Call: (274) [system] atom(1624)
^  Redo: (273) [user] mfix_vars1(1624, _143886)
^  Unify: (273) [user] mfix_vars1(1624, _143886)
   Call: (274) [system] 1624==true
^  Redo: (273) [user] mfix_vars1(1624, _143886)
^  Unify: (273) [user] mfix_vars1(1624, _143886)
   Call: (274) [system] 1624==false
^  Redo: (273) [user] mfix_vars1(1624, _143886)
^  Unify: (273) [user] mfix_vars1(1624, _143886)
   Call: (274) [system] 1624==[_157812, _157818]
^  Redo: (273) [user] mfix_vars1(1624, _143886)
^  Unify: (273) [user] mfix_vars1(1624, _143886)
   Call: (274) [system] is_list(1624)
^  Redo: (273) [user] mfix_vars1(1624, _143886)
^  Unify: (273) [user] mfix_vars1(1624, _143886)
   Call: (274) [system] string(1624)
^  Redo: (273) [user] mfix_vars1(1624, _143886)
^  Unify: (273) [user] mfix_vars1(1624, _143886)
   Call: (274) [system] compound(1624)
^  Redo: (273) [user] mfix_vars1(1624, _143886)
^  Unify: (273) [user] mfix_vars1(1624, _143886)
^  Call: (274) [user] symbol(1624)
^  Unify: (274) [user] symbol(1624)
   Call: (275) [system] atom(1624)
   Fail: (275) [system] atom(1624)
^  Fail: (274) [user] symbol(1624)
^  Redo: (273) [user] mfix_vars1(1624, _143886)
   Call: (274) [system] 1624=_143886
   Exit: (274) [system] 1624=1624
^  Exit: (273) [user] mfix_vars1(1624, 1624)
   Call: (273) [apply] apply:maplist_([0], _143888, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_178212|_178214], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _178212)
^  Unify: (274) [user] mfix_vars1(0, _178212)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _178212)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_182858))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _178212)
^  Unify: (274) [user] mfix_vars1(0, _178212)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _178212)
^  Unify: (274) [user] mfix_vars1(0, _178212)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _178212)
^  Unify: (274) [user] mfix_vars1(0, _178212)
   Call: (275) [system] 0==[_192138, _192144]
^  Redo: (274) [user] mfix_vars1(0, _178212)
^  Unify: (274) [user] mfix_vars1(0, _178212)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _178212)
^  Unify: (274) [user] mfix_vars1(0, _178212)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _178212)
^  Unify: (274) [user] mfix_vars1(0, _178212)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _178212)
^  Unify: (274) [user] mfix_vars1(0, _178212)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _178212)
   Call: (275) [system] 0=_178212
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _178214, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1624, 0], [1624, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;           (@params (", 1624, 0], [";;           (@params (", 1624, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@params (", 1624, 0], [";;           (@params (", 1624, 0])
   Call: (270) [system] compound_name_arguments(_72386, '$COMMENT', [";;           (@params (", 1624, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT', [";;           (@params (", 1624, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@params (", 1624, 0)\=@='$COMMENT'(";;           (@params (", 1624, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1624, 0), _66800)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;           (@params (", 1624, 0), _228386))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@params (", 1624, 0), _228386))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;           (@params (", 1624, 0), _228386))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@params (", 1624, 0), _228386))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@params (", 1624, 0), _228386)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@params (", 1624, 0), _228386)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;           (@params (", 1624, 0), _233972))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@params (", 1624, 0), _233972))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;           (@params (", 1624, 0), _233972)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@params (", 1624, 0), _233972)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;           (@params (", 1624, 0), _233972)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@params (", 1624, 0)\=@='$COMMENT'(";;           (@params (", 1624, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@params (", 1624, 0), _228386)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;           (@params (", 1624, 0), _61188))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@params (", 1624, 0), _61188))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;           (@params (", 1624, 0), _61188))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@params (", 1624, 0), _61188))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@params (", 1624, 0), _61188)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@params (", 1624, 0), _61188)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;           (@params (", 1624, 0), _256292))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@params (", 1624, 0), _256292))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;           (@params (", 1624, 0), _256292)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@params (", 1624, 0), _256292)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;           (@params (", 1624, 0), _256292)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@params (", 1624, 0)\=@='$COMMENT'(";;           (@params (", 1624, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@params (", 1624, 0), _61188)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0)))
   Call: (261) [system] '$COMMENT'(";;           (@params (", 1624, 0)\=@='$COMMENT'(";;           (@params (", 1624, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@params (", 1624, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1624, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1624, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1624, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1624, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1624, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1624, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1624, 0), _285070, [], _285072)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;           (@params (", 1624, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1624, 0), _285070, [], _285072)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1624, 0), _285070, [], _285072)
   Call: (258) [system] atom('$COMMENT'(";;           (@params (", 1624, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1624, 0), _285070, [], _285072)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1624, 0), _285070, [], _285072)
   Call: (258) [system] compound('$COMMENT'(";;           (@params (", 1624, 0))
   Exit: (258) [system] compound('$COMMENT'(";;           (@params (", 1624, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1624, 0), _294386, _294388)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT', [";;           (@params (", 1624, 0])
^  Call: (258) [user] subst_vars([";;           (@params (", 1624, 0], _296272, [], _285072)
^  Unify: (258) [user] subst_vars([";;           (@params (", 1624, 0], [";;           (@params (", 1624, 0], [], [])
   Call: (259) [system] var([";;           (@params (", 1624, 0])
^  Redo: (258) [user] subst_vars([";;           (@params (", 1624, 0], _296272, [], _285072)
^  Unify: (258) [user] subst_vars([";;           (@params (", 1624, 0], [_300008|_300010], [], _285072)
^  Call: (259) [user] subst_vars(";;           (@params (", _300008, [], _300948)
^  Unify: (259) [user] subst_vars(";;           (@params (", ";;           (@params (", [], [])
   Call: (260) [system] var(";;           (@params (")
^  Redo: (259) [user] subst_vars(";;           (@params (", _300008, [], _300948)
^  Unify: (259) [user] subst_vars(";;           (@params (", _300008, [], _300948)
   Call: (260) [system] atom(";;           (@params (")
^  Redo: (259) [user] subst_vars(";;           (@params (", _300008, [], _300948)
^  Unify: (259) [user] subst_vars(";;           (@params (", _300008, [], _300948)
   Call: (260) [system] compound(";;           (@params (")
^  Redo: (259) [user] subst_vars(";;           (@params (", _300008, [], _300948)
^  Unify: (259) [user] subst_vars(";;           (@params (", ";;           (@params (", [], [])
^  Exit: (259) [user] subst_vars(";;           (@params (", ";;           (@params (", [], [])
^  Call: (259) [user] subst_vars([1624, 0], _300010, [], _285072)
^  Unify: (259) [user] subst_vars([1624, 0], [1624, 0], [], [])
   Call: (260) [system] var([1624, 0])
^  Redo: (259) [user] subst_vars([1624, 0], _300010, [], _285072)
^  Unify: (259) [user] subst_vars([1624, 0], [_315880|_315882], [], _285072)
^  Call: (260) [user] subst_vars(1624, _315880, [], _316820)
^  Unify: (260) [user] subst_vars(1624, 1624, [], [])
   Call: (261) [system] var(1624)
^  Redo: (260) [user] subst_vars(1624, _315880, [], _316820)
^  Unify: (260) [user] subst_vars(1624, _315880, [], _316820)
   Call: (261) [system] atom(1624)
^  Redo: (260) [user] subst_vars(1624, _315880, [], _316820)
^  Unify: (260) [user] subst_vars(1624, _315880, [], _316820)
   Call: (261) [system] compound(1624)
^  Redo: (260) [user] subst_vars(1624, _315880, [], _316820)
^  Unify: (260) [user] subst_vars(1624, 1624, [], [])
^  Exit: (260) [user] subst_vars(1624, 1624, [], [])
^  Call: (260) [user] subst_vars([0], _315882, [], _285072)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _315882, [], _285072)
^  Unify: (260) [user] subst_vars([0], [_331752|_331754], [], _285072)
^  Call: (261) [user] subst_vars(0, _331752, [], _332692)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _331752, [], _332692)
^  Unify: (261) [user] subst_vars(0, _331752, [], _332692)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _331752, [], _332692)
^  Unify: (261) [user] subst_vars(0, _331752, [], _332692)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _331752, [], _332692)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _331754, [], _285072)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _331754, [], _285072)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1624, 0], [1624, 0], [], [])
^  Exit: (258) [user] subst_vars([";;           (@params (", 1624, 0], [";;           (@params (", 1624, 0], [], [])
   Call: (258) [system] compound_name_arguments(_285070, '$COMMENT', [";;           (@params (", 1624, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT', [";;           (@params (", 1624, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1624, 0), '$COMMENT'(";;           (@params (", 1624, 0), [], [])
   Call: (257) [system] _355110=metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1624, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1624, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1624, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1624, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1624, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1624, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1624, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1624, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1624, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1625, 0, 58264, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$stream_position'(58264, 1625, 0, 58298)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _407836))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _407836))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _407836)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _407836)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _407836)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _407836)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _413448))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _413448))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _413448))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _413448))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _413448)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _413448)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _419034))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _419034))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _419034)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _419034)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _419034)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _419034)
   Call: (270) [system] var('$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _419034)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$VAR'(_426494))
   Call: (270) [system] atom('$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _419034)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _419034)
   Call: (270) [system] '$COMMENT'(";;             (@param \"First argument\")", 1625, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _419034)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _419034)
   Call: (270) [system] '$COMMENT'(";;             (@param \"First argument\")", 1625, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _419034)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _419034)
   Call: (270) [system] '$COMMENT'(";;             (@param \"First argument\")", 1625, 0)==[_435774, _435780]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _419034)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _419034)
   Call: (270) [system] is_list('$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _419034)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _419034)
   Call: (270) [system] string('$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _419034)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _419034)
   Call: (270) [system] compound('$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _445976, _445978)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT', [";;             (@param \"First argument\")", 1625, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (@param \"First argument\")", 1625, 0], _449718)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (@param \"First argument\")", 1625, 0], _449718)
   Call: (271) [apply] apply:maplist_([";;             (@param \"First argument\")", 1625, 0], _449718, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (@param \"First argument\")", 1625, 0], [_452536|_452538], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _452536)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _452536)
   Call: (273) [system] var(";;             (@param \"First argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _452536)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", '$VAR'(_457182))
   Call: (273) [system] atom(";;             (@param \"First argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _452536)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _452536)
   Call: (273) [system] ";;             (@param \"First argument\")"==true
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _452536)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _452536)
   Call: (273) [system] ";;             (@param \"First argument\")"==false
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _452536)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _452536)
   Call: (273) [system] ";;             (@param \"First argument\")"==[_466462, _466468]
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _452536)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _452536)
   Call: (273) [system] is_list(";;             (@param \"First argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _452536)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _452536)
   Call: (273) [system] string(";;             (@param \"First argument\")")
   Exit: (273) [system] string(";;             (@param \"First argument\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _452536)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _452536)
   Call: (273) [system] compound(";;             (@param \"First argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _452536)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _452536)
^  Call: (273) [user] symbol(";;             (@param \"First argument\")")
^  Unify: (273) [user] symbol(";;             (@param \"First argument\")")
   Call: (274) [system] atom(";;             (@param \"First argument\")")
   Fail: (274) [system] atom(";;             (@param \"First argument\")")
^  Fail: (273) [user] symbol(";;             (@param \"First argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _452536)
   Call: (273) [system] ";;             (@param \"First argument\")"=_452536
   Exit: (273) [system] ";;             (@param \"First argument\")"=";;             (@param \"First argument\")"
^  Exit: (272) [user] mfix_vars1(";;             (@param \"First argument\")", ";;             (@param \"First argument\")")
   Call: (272) [apply] apply:maplist_([1625, 0], _452538, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1625, 0], [_490534|_490536], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1625, _490534)
^  Unify: (273) [user] mfix_vars1(1625, _490534)
   Call: (274) [system] var(1625)
^  Redo: (273) [user] mfix_vars1(1625, _490534)
^  Unify: (273) [user] mfix_vars1(1625, '$VAR'(_495180))
   Call: (274) [system] atom(1625)
^  Redo: (273) [user] mfix_vars1(1625, _490534)
^  Unify: (273) [user] mfix_vars1(1625, _490534)
   Call: (274) [system] 1625==true
^  Redo: (273) [user] mfix_vars1(1625, _490534)
^  Unify: (273) [user] mfix_vars1(1625, _490534)
   Call: (274) [system] 1625==false
^  Redo: (273) [user] mfix_vars1(1625, _490534)
^  Unify: (273) [user] mfix_vars1(1625, _490534)
   Call: (274) [system] 1625==[_504460, _504466]
^  Redo: (273) [user] mfix_vars1(1625, _490534)
^  Unify: (273) [user] mfix_vars1(1625, _490534)
   Call: (274) [system] is_list(1625)
^  Redo: (273) [user] mfix_vars1(1625, _490534)
^  Unify: (273) [user] mfix_vars1(1625, _490534)
   Call: (274) [system] string(1625)
^  Redo: (273) [user] mfix_vars1(1625, _490534)
^  Unify: (273) [user] mfix_vars1(1625, _490534)
   Call: (274) [system] compound(1625)
^  Redo: (273) [user] mfix_vars1(1625, _490534)
^  Unify: (273) [user] mfix_vars1(1625, _490534)
^  Call: (274) [user] symbol(1625)
^  Unify: (274) [user] symbol(1625)
   Call: (275) [system] atom(1625)
   Fail: (275) [system] atom(1625)
^  Fail: (274) [user] symbol(1625)
^  Redo: (273) [user] mfix_vars1(1625, _490534)
   Call: (274) [system] 1625=_490534
   Exit: (274) [system] 1625=1625
^  Exit: (273) [user] mfix_vars1(1625, 1625)
   Call: (273) [apply] apply:maplist_([0], _6040, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_6922|_6924], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _6922)
^  Unify: (274) [user] mfix_vars1(0, _6922)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _6922)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_11568))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _6922)
^  Unify: (274) [user] mfix_vars1(0, _6922)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _6922)
^  Unify: (274) [user] mfix_vars1(0, _6922)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _6922)
^  Unify: (274) [user] mfix_vars1(0, _6922)
   Call: (275) [system] 0==[_20848, _20854]
^  Redo: (274) [user] mfix_vars1(0, _6922)
^  Unify: (274) [user] mfix_vars1(0, _6922)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _6922)
^  Unify: (274) [user] mfix_vars1(0, _6922)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _6922)
^  Unify: (274) [user] mfix_vars1(0, _6922)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _6922)
^  Unify: (274) [user] mfix_vars1(0, _6922)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6922)
   Call: (275) [system] 0=_6922
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6924, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1625, 0], [1625, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (@param \"First argument\")", 1625, 0], [";;             (@param \"First argument\")", 1625, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (@param \"First argument\")", 1625, 0], [";;             (@param \"First argument\")", 1625, 0])
   Call: (270) [system] compound_name_arguments(_5986, '$COMMENT', [";;             (@param \"First argument\")", 1625, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT', [";;             (@param \"First argument\")", 1625, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"First argument\")", 1625, 0)\=@='$COMMENT'(";;             (@param \"First argument\")", 1625, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _5972)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _57096))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _57096))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _57096))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _57096))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _57096)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _57096)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _62682))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _62682))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _62682)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _62682)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _62682)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"First argument\")", 1625, 0)\=@='$COMMENT'(";;             (@param \"First argument\")", 1625, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _57096)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _5952))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _5952))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _5952))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _5952))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _5952)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _85002))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _85002))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _85002)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _85002)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _85002)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"First argument\")", 1625, 0)\=@='$COMMENT'(";;             (@param \"First argument\")", 1625, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0)))
   Call: (261) [system] '$COMMENT'(";;             (@param \"First argument\")", 1625, 0)\=@='$COMMENT'(";;             (@param \"First argument\")", 1625, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _113780, [], _113782)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _113780, [], _113782)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _113780, [], _113782)
   Call: (258) [system] atom('$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _113780, [], _113782)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _113780, [], _113782)
   Call: (258) [system] compound('$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (@param \"First argument\")", 1625, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), _123096, _123098)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT', [";;             (@param \"First argument\")", 1625, 0])
^  Call: (258) [user] subst_vars([";;             (@param \"First argument\")", 1625, 0], _124982, [], _113782)
^  Unify: (258) [user] subst_vars([";;             (@param \"First argument\")", 1625, 0], [";;             (@param \"First argument\")", 1625, 0], [], [])
   Call: (259) [system] var([";;             (@param \"First argument\")", 1625, 0])
^  Redo: (258) [user] subst_vars([";;             (@param \"First argument\")", 1625, 0], _124982, [], _113782)
^  Unify: (258) [user] subst_vars([";;             (@param \"First argument\")", 1625, 0], [_128718|_128720], [], _113782)
^  Call: (259) [user] subst_vars(";;             (@param \"First argument\")", _128718, [], _129658)
^  Unify: (259) [user] subst_vars(";;             (@param \"First argument\")", ";;             (@param \"First argument\")", [], [])
   Call: (260) [system] var(";;             (@param \"First argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"First argument\")", _128718, [], _129658)
^  Unify: (259) [user] subst_vars(";;             (@param \"First argument\")", _128718, [], _129658)
   Call: (260) [system] atom(";;             (@param \"First argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"First argument\")", _128718, [], _129658)
^  Unify: (259) [user] subst_vars(";;             (@param \"First argument\")", _128718, [], _129658)
   Call: (260) [system] compound(";;             (@param \"First argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"First argument\")", _128718, [], _129658)
^  Unify: (259) [user] subst_vars(";;             (@param \"First argument\")", ";;             (@param \"First argument\")", [], [])
^  Exit: (259) [user] subst_vars(";;             (@param \"First argument\")", ";;             (@param \"First argument\")", [], [])
^  Call: (259) [user] subst_vars([1625, 0], _128720, [], _113782)
^  Unify: (259) [user] subst_vars([1625, 0], [1625, 0], [], [])
   Call: (260) [system] var([1625, 0])
^  Redo: (259) [user] subst_vars([1625, 0], _128720, [], _113782)
^  Unify: (259) [user] subst_vars([1625, 0], [_144590|_144592], [], _113782)
^  Call: (260) [user] subst_vars(1625, _144590, [], _145530)
^  Unify: (260) [user] subst_vars(1625, 1625, [], [])
   Call: (261) [system] var(1625)
^  Redo: (260) [user] subst_vars(1625, _144590, [], _145530)
^  Unify: (260) [user] subst_vars(1625, _144590, [], _145530)
   Call: (261) [system] atom(1625)
^  Redo: (260) [user] subst_vars(1625, _144590, [], _145530)
^  Unify: (260) [user] subst_vars(1625, _144590, [], _145530)
   Call: (261) [system] compound(1625)
^  Redo: (260) [user] subst_vars(1625, _144590, [], _145530)
^  Unify: (260) [user] subst_vars(1625, 1625, [], [])
^  Exit: (260) [user] subst_vars(1625, 1625, [], [])
^  Call: (260) [user] subst_vars([0], _144592, [], _113782)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _144592, [], _113782)
^  Unify: (260) [user] subst_vars([0], [_160462|_160464], [], _113782)
^  Call: (261) [user] subst_vars(0, _160462, [], _161402)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _160462, [], _161402)
^  Unify: (261) [user] subst_vars(0, _160462, [], _161402)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _160462, [], _161402)
^  Unify: (261) [user] subst_vars(0, _160462, [], _161402)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _160462, [], _161402)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _160464, [], _113782)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _160464, [], _113782)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1625, 0], [1625, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (@param \"First argument\")", 1625, 0], [";;             (@param \"First argument\")", 1625, 0], [], [])
   Call: (258) [system] compound_name_arguments(_113780, '$COMMENT', [";;             (@param \"First argument\")", 1625, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT', [";;             (@param \"First argument\")", 1625, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1625, 0), '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), [], [])
   Call: (257) [system] _183820=metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1625, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1626, 0, 58305, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$stream_position'(58305, 1626, 0, 58339)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _236546))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _236546))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _236546)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _236546)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _236546)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _236546)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _242158))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _242158))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _242158))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _242158))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _242158)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _242158)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _247744))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _247744))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _247744)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _247744)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _247744)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _247744)
   Call: (270) [system] var('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _247744)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$VAR'(_255204))
   Call: (270) [system] atom('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _247744)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _247744)
   Call: (270) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _247744)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _247744)
   Call: (270) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _247744)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _247744)
   Call: (270) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0)==[_264484, _264490]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _247744)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _247744)
   Call: (270) [system] is_list('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _247744)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _247744)
   Call: (270) [system] string('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _247744)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _247744)
   Call: (270) [system] compound('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _274686, _274688)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT', [";;             (@param \"Second argument\")", 1626, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (@param \"Second argument\")", 1626, 0], _278428)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (@param \"Second argument\")", 1626, 0], _278428)
   Call: (271) [apply] apply:maplist_([";;             (@param \"Second argument\")", 1626, 0], _278428, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (@param \"Second argument\")", 1626, 0], [_281246|_281248], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _281246)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _281246)
   Call: (273) [system] var(";;             (@param \"Second argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _281246)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", '$VAR'(_285892))
   Call: (273) [system] atom(";;             (@param \"Second argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _281246)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _281246)
   Call: (273) [system] ";;             (@param \"Second argument\")"==true
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _281246)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _281246)
   Call: (273) [system] ";;             (@param \"Second argument\")"==false
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _281246)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _281246)
   Call: (273) [system] ";;             (@param \"Second argument\")"==[_295172, _295178]
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _281246)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _281246)
   Call: (273) [system] is_list(";;             (@param \"Second argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _281246)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _281246)
   Call: (273) [system] string(";;             (@param \"Second argument\")")
   Exit: (273) [system] string(";;             (@param \"Second argument\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _281246)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _281246)
   Call: (273) [system] compound(";;             (@param \"Second argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _281246)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _281246)
^  Call: (273) [user] symbol(";;             (@param \"Second argument\")")
^  Unify: (273) [user] symbol(";;             (@param \"Second argument\")")
   Call: (274) [system] atom(";;             (@param \"Second argument\")")
   Fail: (274) [system] atom(";;             (@param \"Second argument\")")
^  Fail: (273) [user] symbol(";;             (@param \"Second argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _281246)
   Call: (273) [system] ";;             (@param \"Second argument\")"=_281246
   Exit: (273) [system] ";;             (@param \"Second argument\")"=";;             (@param \"Second argument\")"
^  Exit: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", ";;             (@param \"Second argument\")")
   Call: (272) [apply] apply:maplist_([1626, 0], _281248, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1626, 0], [_319244|_319246], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1626, _319244)
^  Unify: (273) [user] mfix_vars1(1626, _319244)
   Call: (274) [system] var(1626)
^  Redo: (273) [user] mfix_vars1(1626, _319244)
^  Unify: (273) [user] mfix_vars1(1626, '$VAR'(_323890))
   Call: (274) [system] atom(1626)
^  Redo: (273) [user] mfix_vars1(1626, _319244)
^  Unify: (273) [user] mfix_vars1(1626, _319244)
   Call: (274) [system] 1626==true
^  Redo: (273) [user] mfix_vars1(1626, _319244)
^  Unify: (273) [user] mfix_vars1(1626, _319244)
   Call: (274) [system] 1626==false
^  Redo: (273) [user] mfix_vars1(1626, _319244)
^  Unify: (273) [user] mfix_vars1(1626, _319244)
   Call: (274) [system] 1626==[_333170, _333176]
^  Redo: (273) [user] mfix_vars1(1626, _319244)
^  Unify: (273) [user] mfix_vars1(1626, _319244)
   Call: (274) [system] is_list(1626)
^  Redo: (273) [user] mfix_vars1(1626, _319244)
^  Unify: (273) [user] mfix_vars1(1626, _319244)
   Call: (274) [system] string(1626)
^  Redo: (273) [user] mfix_vars1(1626, _319244)
^  Unify: (273) [user] mfix_vars1(1626, _319244)
   Call: (274) [system] compound(1626)
^  Redo: (273) [user] mfix_vars1(1626, _319244)
^  Unify: (273) [user] mfix_vars1(1626, _319244)
^  Call: (274) [user] symbol(1626)
^  Unify: (274) [user] symbol(1626)
   Call: (275) [system] atom(1626)
   Fail: (275) [system] atom(1626)
^  Fail: (274) [user] symbol(1626)
^  Redo: (273) [user] mfix_vars1(1626, _319244)
   Call: (274) [system] 1626=_319244
   Exit: (274) [system] 1626=1626
^  Exit: (273) [user] mfix_vars1(1626, 1626)
   Call: (273) [apply] apply:maplist_([0], _319246, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_353570|_353572], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _353570)
^  Unify: (274) [user] mfix_vars1(0, _353570)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _353570)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_358216))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _353570)
^  Unify: (274) [user] mfix_vars1(0, _353570)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _353570)
^  Unify: (274) [user] mfix_vars1(0, _353570)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _353570)
^  Unify: (274) [user] mfix_vars1(0, _353570)
   Call: (275) [system] 0==[_367496, _367502]
^  Redo: (274) [user] mfix_vars1(0, _353570)
^  Unify: (274) [user] mfix_vars1(0, _353570)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _353570)
^  Unify: (274) [user] mfix_vars1(0, _353570)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _353570)
^  Unify: (274) [user] mfix_vars1(0, _353570)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _353570)
^  Unify: (274) [user] mfix_vars1(0, _353570)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _353570)
   Call: (275) [system] 0=_353570
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _353572, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1626, 0], [1626, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (@param \"Second argument\")", 1626, 0], [";;             (@param \"Second argument\")", 1626, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (@param \"Second argument\")", 1626, 0], [";;             (@param \"Second argument\")", 1626, 0])
   Call: (270) [system] compound_name_arguments(_247744, '$COMMENT', [";;             (@param \"Second argument\")", 1626, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT', [";;             (@param \"Second argument\")", 1626, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0)\=@='$COMMENT'(";;             (@param \"Second argument\")", 1626, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _242158)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _403744))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _403744))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _403744))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _403744))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _403744)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _403744)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _409330))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _409330))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _409330)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _409330)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _409330)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0)\=@='$COMMENT'(";;             (@param \"Second argument\")", 1626, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _403744)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _236546))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _236546))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _236546))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _236546))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _236546)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _236546)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _431650))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _431650))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _431650)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _431650)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _431650)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0)\=@='$COMMENT'(";;             (@param \"Second argument\")", 1626, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _236546)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0)))
   Call: (261) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0)\=@='$COMMENT'(";;             (@param \"Second argument\")", 1626, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _460428, [], _460430)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _460428, [], _460430)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _460428, [], _460430)
   Call: (258) [system] atom('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _460428, [], _460430)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _460428, [], _460430)
   Call: (258) [system] compound('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), _469744, _469746)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT', [";;             (@param \"Second argument\")", 1626, 0])
^  Call: (258) [user] subst_vars([";;             (@param \"Second argument\")", 1626, 0], _471630, [], _460430)
^  Unify: (258) [user] subst_vars([";;             (@param \"Second argument\")", 1626, 0], [";;             (@param \"Second argument\")", 1626, 0], [], [])
   Call: (259) [system] var([";;             (@param \"Second argument\")", 1626, 0])
^  Redo: (258) [user] subst_vars([";;             (@param \"Second argument\")", 1626, 0], _471630, [], _460430)
^  Unify: (258) [user] subst_vars([";;             (@param \"Second argument\")", 1626, 0], [_475366|_475368], [], _460430)
^  Call: (259) [user] subst_vars(";;             (@param \"Second argument\")", _475366, [], _476306)
^  Unify: (259) [user] subst_vars(";;             (@param \"Second argument\")", ";;             (@param \"Second argument\")", [], [])
   Call: (260) [system] var(";;             (@param \"Second argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"Second argument\")", _475366, [], _476306)
^  Unify: (259) [user] subst_vars(";;             (@param \"Second argument\")", _475366, [], _476306)
   Call: (260) [system] atom(";;             (@param \"Second argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"Second argument\")", _475366, [], _476306)
^  Unify: (259) [user] subst_vars(";;             (@param \"Second argument\")", _475366, [], _476306)
   Call: (260) [system] compound(";;             (@param \"Second argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"Second argument\")", _475366, [], _476306)
^  Unify: (259) [user] subst_vars(";;             (@param \"Second argument\")", ";;             (@param \"Second argument\")", [], [])
^  Exit: (259) [user] subst_vars(";;             (@param \"Second argument\")", ";;             (@param \"Second argument\")", [], [])
^  Call: (259) [user] subst_vars([1626, 0], _475368, [], _460430)
^  Unify: (259) [user] subst_vars([1626, 0], [1626, 0], [], [])
   Call: (260) [system] var([1626, 0])
^  Redo: (259) [user] subst_vars([1626, 0], _475368, [], _460430)
^  Unify: (259) [user] subst_vars([1626, 0], [_491238|_491240], [], _460430)
^  Call: (260) [user] subst_vars(1626, _491238, [], _492178)
^  Unify: (260) [user] subst_vars(1626, 1626, [], [])
   Call: (261) [system] var(1626)
^  Redo: (260) [user] subst_vars(1626, _491238, [], _492178)
^  Unify: (260) [user] subst_vars(1626, _491238, [], _492178)
   Call: (261) [system] atom(1626)
^  Redo: (260) [user] subst_vars(1626, _491238, [], _492178)
^  Unify: (260) [user] subst_vars(1626, _491238, [], _492178)
   Call: (261) [system] compound(1626)
^  Redo: (260) [user] subst_vars(1626, _491238, [], _492178)
^  Unify: (260) [user] subst_vars(1626, 1626, [], [])
^  Exit: (260) [user] subst_vars(1626, 1626, [], [])
^  Call: (260) [user] subst_vars([0], _491240, [], _460430)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _491240, [], _460430)
^  Unify: (260) [user] subst_vars([0], [_507110|_507112], [], _460430)
^  Call: (261) [user] subst_vars(0, _507110, [], _508050)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _507110, [], _508050)
^  Unify: (261) [user] subst_vars(0, _507110, [], _508050)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _507110, [], _508050)
^  Unify: (261) [user] subst_vars(0, _507110, [], _508050)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _507110, [], _508050)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _507112, [], _460430)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _507112, [], _460430)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1626, 0], [1626, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (@param \"Second argument\")", 1626, 0], [";;             (@param \"Second argument\")", 1626, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5946, '$COMMENT', [";;             (@param \"Second argument\")", 1626, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT', [";;             (@param \"Second argument\")", 1626, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), [], [])
   Call: (257) [system] _12488=metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1626, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1627, 0, 58347, '$COMMENT'(";;           ))", 1627, 0), '$stream_position'(58347, 1627, 0, 58381)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           ))", 1627, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           ))", 1627, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;           ))", 1627, 0), _65208))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           ))", 1627, 0), _65208))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;           ))", 1627, 0), _65208)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           ))", 1627, 0), _65208)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;           ))", 1627, 0), _65208)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;           ))", 1627, 0), _65208)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;           ))", 1627, 0), _70820))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           ))", 1627, 0), _70820))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;           ))", 1627, 0), _70820))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           ))", 1627, 0), _70820))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           ))", 1627, 0), _70820)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           ))", 1627, 0), _70820)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;           ))", 1627, 0), _76406))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           ))", 1627, 0), _76406))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;           ))", 1627, 0), _76406)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           ))", 1627, 0), _76406)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1627, 0), _76406)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1627, 0), _76406)
   Call: (270) [system] var('$COMMENT'(";;           ))", 1627, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1627, 0), _76406)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1627, 0), '$VAR'(_83866))
   Call: (270) [system] atom('$COMMENT'(";;           ))", 1627, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1627, 0), _76406)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1627, 0), _76406)
   Call: (270) [system] '$COMMENT'(";;           ))", 1627, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1627, 0), _76406)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1627, 0), _76406)
   Call: (270) [system] '$COMMENT'(";;           ))", 1627, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1627, 0), _76406)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1627, 0), _76406)
   Call: (270) [system] '$COMMENT'(";;           ))", 1627, 0)==[_93146, _93152]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1627, 0), _76406)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1627, 0), _76406)
   Call: (270) [system] is_list('$COMMENT'(";;           ))", 1627, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1627, 0), _76406)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1627, 0), _76406)
   Call: (270) [system] string('$COMMENT'(";;           ))", 1627, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1627, 0), _76406)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1627, 0), _76406)
   Call: (270) [system] compound('$COMMENT'(";;           ))", 1627, 0))
   Exit: (270) [system] compound('$COMMENT'(";;           ))", 1627, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;           ))", 1627, 0), _103348, _103350)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           ))", 1627, 0), '$COMMENT', [";;           ))", 1627, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;           ))", 1627, 0], _107090)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;           ))", 1627, 0], _107090)
   Call: (271) [apply] apply:maplist_([";;           ))", 1627, 0], _107090, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;           ))", 1627, 0], [_109908|_109910], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;           ))", _109908)
^  Unify: (272) [user] mfix_vars1(";;           ))", _109908)
   Call: (273) [system] var(";;           ))")
^  Redo: (272) [user] mfix_vars1(";;           ))", _109908)
^  Unify: (272) [user] mfix_vars1(";;           ))", '$VAR'(_114554))
   Call: (273) [system] atom(";;           ))")
^  Redo: (272) [user] mfix_vars1(";;           ))", _109908)
^  Unify: (272) [user] mfix_vars1(";;           ))", _109908)
   Call: (273) [system] ";;           ))"==true
^  Redo: (272) [user] mfix_vars1(";;           ))", _109908)
^  Unify: (272) [user] mfix_vars1(";;           ))", _109908)
   Call: (273) [system] ";;           ))"==false
^  Redo: (272) [user] mfix_vars1(";;           ))", _109908)
^  Unify: (272) [user] mfix_vars1(";;           ))", _109908)
   Call: (273) [system] ";;           ))"==[_123834, _123840]
^  Redo: (272) [user] mfix_vars1(";;           ))", _109908)
^  Unify: (272) [user] mfix_vars1(";;           ))", _109908)
   Call: (273) [system] is_list(";;           ))")
^  Redo: (272) [user] mfix_vars1(";;           ))", _109908)
^  Unify: (272) [user] mfix_vars1(";;           ))", _109908)
   Call: (273) [system] string(";;           ))")
   Exit: (273) [system] string(";;           ))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;           ))", _109908)
^  Unify: (272) [user] mfix_vars1(";;           ))", _109908)
   Call: (273) [system] compound(";;           ))")
^  Redo: (272) [user] mfix_vars1(";;           ))", _109908)
^  Unify: (272) [user] mfix_vars1(";;           ))", _109908)
^  Call: (273) [user] symbol(";;           ))")
^  Unify: (273) [user] symbol(";;           ))")
   Call: (274) [system] atom(";;           ))")
   Fail: (274) [system] atom(";;           ))")
^  Fail: (273) [user] symbol(";;           ))")
^  Redo: (272) [user] mfix_vars1(";;           ))", _109908)
   Call: (273) [system] ";;           ))"=_109908
   Exit: (273) [system] ";;           ))"=";;           ))"
^  Exit: (272) [user] mfix_vars1(";;           ))", ";;           ))")
   Call: (272) [apply] apply:maplist_([1627, 0], _109910, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1627, 0], [_147906|_147908], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1627, _147906)
^  Unify: (273) [user] mfix_vars1(1627, _147906)
   Call: (274) [system] var(1627)
^  Redo: (273) [user] mfix_vars1(1627, _147906)
^  Unify: (273) [user] mfix_vars1(1627, '$VAR'(_152552))
   Call: (274) [system] atom(1627)
^  Redo: (273) [user] mfix_vars1(1627, _147906)
^  Unify: (273) [user] mfix_vars1(1627, _147906)
   Call: (274) [system] 1627==true
^  Redo: (273) [user] mfix_vars1(1627, _147906)
^  Unify: (273) [user] mfix_vars1(1627, _147906)
   Call: (274) [system] 1627==false
^  Redo: (273) [user] mfix_vars1(1627, _147906)
^  Unify: (273) [user] mfix_vars1(1627, _147906)
   Call: (274) [system] 1627==[_161832, _161838]
^  Redo: (273) [user] mfix_vars1(1627, _147906)
^  Unify: (273) [user] mfix_vars1(1627, _147906)
   Call: (274) [system] is_list(1627)
^  Redo: (273) [user] mfix_vars1(1627, _147906)
^  Unify: (273) [user] mfix_vars1(1627, _147906)
   Call: (274) [system] string(1627)
^  Redo: (273) [user] mfix_vars1(1627, _147906)
^  Unify: (273) [user] mfix_vars1(1627, _147906)
   Call: (274) [system] compound(1627)
^  Redo: (273) [user] mfix_vars1(1627, _147906)
^  Unify: (273) [user] mfix_vars1(1627, _147906)
^  Call: (274) [user] symbol(1627)
^  Unify: (274) [user] symbol(1627)
   Call: (275) [system] atom(1627)
   Fail: (275) [system] atom(1627)
^  Fail: (274) [user] symbol(1627)
^  Redo: (273) [user] mfix_vars1(1627, _147906)
   Call: (274) [system] 1627=_147906
   Exit: (274) [system] 1627=1627
^  Exit: (273) [user] mfix_vars1(1627, 1627)
   Call: (273) [apply] apply:maplist_([0], _147908, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_182232|_182234], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _182232)
^  Unify: (274) [user] mfix_vars1(0, _182232)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _182232)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_186878))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _182232)
^  Unify: (274) [user] mfix_vars1(0, _182232)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _182232)
^  Unify: (274) [user] mfix_vars1(0, _182232)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _182232)
^  Unify: (274) [user] mfix_vars1(0, _182232)
   Call: (275) [system] 0==[_196158, _196164]
^  Redo: (274) [user] mfix_vars1(0, _182232)
^  Unify: (274) [user] mfix_vars1(0, _182232)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _182232)
^  Unify: (274) [user] mfix_vars1(0, _182232)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _182232)
^  Unify: (274) [user] mfix_vars1(0, _182232)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _182232)
^  Unify: (274) [user] mfix_vars1(0, _182232)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _182232)
   Call: (275) [system] 0=_182232
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _182234, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1627, 0], [1627, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;           ))", 1627, 0], [";;           ))", 1627, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;           ))", 1627, 0], [";;           ))", 1627, 0])
   Call: (270) [system] compound_name_arguments(_76406, '$COMMENT', [";;           ))", 1627, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           ))", 1627, 0), '$COMMENT', [";;           ))", 1627, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0)))
   Call: (267) [system] '$COMMENT'(";;           ))", 1627, 0)\=@='$COMMENT'(";;           ))", 1627, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           ))", 1627, 0), _70820)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;           ))", 1627, 0), _232406))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           ))", 1627, 0), _232406))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;           ))", 1627, 0), _232406))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           ))", 1627, 0), _232406))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;           ))", 1627, 0), _232406)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           ))", 1627, 0), _232406)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;           ))", 1627, 0), _237992))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           ))", 1627, 0), _237992))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;           ))", 1627, 0), _237992)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           ))", 1627, 0), _237992)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;           ))", 1627, 0), _237992)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0)))
   Call: (267) [system] '$COMMENT'(";;           ))", 1627, 0)\=@='$COMMENT'(";;           ))", 1627, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;           ))", 1627, 0), _232406)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;           ))", 1627, 0), _65208))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           ))", 1627, 0), _65208))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;           ))", 1627, 0), _65208))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           ))", 1627, 0), _65208))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;           ))", 1627, 0), _65208)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           ))", 1627, 0), _65208)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;           ))", 1627, 0), _260312))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           ))", 1627, 0), _260312))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;           ))", 1627, 0), _260312)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           ))", 1627, 0), _260312)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;           ))", 1627, 0), _260312)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0)))
   Call: (267) [system] '$COMMENT'(";;           ))", 1627, 0)\=@='$COMMENT'(";;           ))", 1627, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;           ))", 1627, 0), _65208)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0)))
   Call: (261) [system] '$COMMENT'(";;           ))", 1627, 0)\=@='$COMMENT'(";;           ))", 1627, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           ))", 1627, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1627, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1627, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1627, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1627, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1627, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1627, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;           ))", 1627, 0), _289090, [], _289092)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;           ))", 1627, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           ))", 1627, 0), _289090, [], _289092)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           ))", 1627, 0), _289090, [], _289092)
   Call: (258) [system] atom('$COMMENT'(";;           ))", 1627, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           ))", 1627, 0), _289090, [], _289092)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           ))", 1627, 0), _289090, [], _289092)
   Call: (258) [system] compound('$COMMENT'(";;           ))", 1627, 0))
   Exit: (258) [system] compound('$COMMENT'(";;           ))", 1627, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;           ))", 1627, 0), _298406, _298408)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           ))", 1627, 0), '$COMMENT', [";;           ))", 1627, 0])
^  Call: (258) [user] subst_vars([";;           ))", 1627, 0], _300292, [], _289092)
^  Unify: (258) [user] subst_vars([";;           ))", 1627, 0], [";;           ))", 1627, 0], [], [])
   Call: (259) [system] var([";;           ))", 1627, 0])
^  Redo: (258) [user] subst_vars([";;           ))", 1627, 0], _300292, [], _289092)
^  Unify: (258) [user] subst_vars([";;           ))", 1627, 0], [_304028|_304030], [], _289092)
^  Call: (259) [user] subst_vars(";;           ))", _304028, [], _304968)
^  Unify: (259) [user] subst_vars(";;           ))", ";;           ))", [], [])
   Call: (260) [system] var(";;           ))")
^  Redo: (259) [user] subst_vars(";;           ))", _304028, [], _304968)
^  Unify: (259) [user] subst_vars(";;           ))", _304028, [], _304968)
   Call: (260) [system] atom(";;           ))")
^  Redo: (259) [user] subst_vars(";;           ))", _304028, [], _304968)
^  Unify: (259) [user] subst_vars(";;           ))", _304028, [], _304968)
   Call: (260) [system] compound(";;           ))")
^  Redo: (259) [user] subst_vars(";;           ))", _304028, [], _304968)
^  Unify: (259) [user] subst_vars(";;           ))", ";;           ))", [], [])
^  Exit: (259) [user] subst_vars(";;           ))", ";;           ))", [], [])
^  Call: (259) [user] subst_vars([1627, 0], _304030, [], _289092)
^  Unify: (259) [user] subst_vars([1627, 0], [1627, 0], [], [])
   Call: (260) [system] var([1627, 0])
^  Redo: (259) [user] subst_vars([1627, 0], _304030, [], _289092)
^  Unify: (259) [user] subst_vars([1627, 0], [_319900|_319902], [], _289092)
^  Call: (260) [user] subst_vars(1627, _319900, [], _320840)
^  Unify: (260) [user] subst_vars(1627, 1627, [], [])
   Call: (261) [system] var(1627)
^  Redo: (260) [user] subst_vars(1627, _319900, [], _320840)
^  Unify: (260) [user] subst_vars(1627, _319900, [], _320840)
   Call: (261) [system] atom(1627)
^  Redo: (260) [user] subst_vars(1627, _319900, [], _320840)
^  Unify: (260) [user] subst_vars(1627, _319900, [], _320840)
   Call: (261) [system] compound(1627)
^  Redo: (260) [user] subst_vars(1627, _319900, [], _320840)
^  Unify: (260) [user] subst_vars(1627, 1627, [], [])
^  Exit: (260) [user] subst_vars(1627, 1627, [], [])
^  Call: (260) [user] subst_vars([0], _319902, [], _289092)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _319902, [], _289092)
^  Unify: (260) [user] subst_vars([0], [_335772|_335774], [], _289092)
^  Call: (261) [user] subst_vars(0, _335772, [], _336712)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _335772, [], _336712)
^  Unify: (261) [user] subst_vars(0, _335772, [], _336712)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _335772, [], _336712)
^  Unify: (261) [user] subst_vars(0, _335772, [], _336712)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _335772, [], _336712)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _335774, [], _289092)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _335774, [], _289092)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1627, 0], [1627, 0], [], [])
^  Exit: (258) [user] subst_vars([";;           ))", 1627, 0], [";;           ))", 1627, 0], [], [])
   Call: (258) [system] compound_name_arguments(_289090, '$COMMENT', [";;           ))", 1627, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           ))", 1627, 0), '$COMMENT', [";;           ))", 1627, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;           ))", 1627, 0), '$COMMENT'(";;           ))", 1627, 0), [], [])
   Call: (257) [system] _359130=metta_file_buffer(+, '$COMMENT'(";;           ))", 1627, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;           ))", 1627, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;           ))", 1627, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           ))", 1627, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           ))", 1627, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           ))", 1627, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           ))", 1627, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           ))", 1627, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           ))", 1627, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1628, 0, 58363, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$stream_position'(58363, 1628, 0, 58397)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _411854))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _411854))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _411854)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _411854)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _411854)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _411854)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _417466))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _417466))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _417466))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _417466))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _417466)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _417466)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _423052))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _423052))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _423052)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _423052)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _423052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _423052)
   Call: (270) [system] var('$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _423052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$VAR'(_430512))
   Call: (270) [system] atom('$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _423052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _423052)
   Call: (270) [system] '$COMMENT'(";;           (@return \"Return value\")", 1628, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _423052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _423052)
   Call: (270) [system] '$COMMENT'(";;           (@return \"Return value\")", 1628, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _423052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _423052)
   Call: (270) [system] '$COMMENT'(";;           (@return \"Return value\")", 1628, 0)==[_439792, _439798]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _423052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _423052)
   Call: (270) [system] is_list('$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _423052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _423052)
   Call: (270) [system] string('$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _423052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _423052)
   Call: (270) [system] compound('$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
   Exit: (270) [system] compound('$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _449994, _449996)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT', [";;           (@return \"Return value\")", 1628, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;           (@return \"Return value\")", 1628, 0], _453736)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@return \"Return value\")", 1628, 0], _453736)
   Call: (271) [apply] apply:maplist_([";;           (@return \"Return value\")", 1628, 0], _453736, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;           (@return \"Return value\")", 1628, 0], [_456554|_456556], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _456554)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _456554)
   Call: (273) [system] var(";;           (@return \"Return value\")")
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _456554)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", '$VAR'(_461200))
   Call: (273) [system] atom(";;           (@return \"Return value\")")
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _456554)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _456554)
   Call: (273) [system] ";;           (@return \"Return value\")"==true
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _456554)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _456554)
   Call: (273) [system] ";;           (@return \"Return value\")"==false
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _456554)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _456554)
   Call: (273) [system] ";;           (@return \"Return value\")"==[_470480, _470486]
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _456554)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _456554)
   Call: (273) [system] is_list(";;           (@return \"Return value\")")
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _456554)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _456554)
   Call: (273) [system] string(";;           (@return \"Return value\")")
   Exit: (273) [system] string(";;           (@return \"Return value\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _456554)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _456554)
   Call: (273) [system] compound(";;           (@return \"Return value\")")
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _456554)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _456554)
^  Call: (273) [user] symbol(";;           (@return \"Return value\")")
^  Unify: (273) [user] symbol(";;           (@return \"Return value\")")
   Call: (274) [system] atom(";;           (@return \"Return value\")")
   Fail: (274) [system] atom(";;           (@return \"Return value\")")
^  Fail: (273) [user] symbol(";;           (@return \"Return value\")")
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _456554)
   Call: (273) [system] ";;           (@return \"Return value\")"=_456554
   Exit: (273) [system] ";;           (@return \"Return value\")"=";;           (@return \"Return value\")"
^  Exit: (272) [user] mfix_vars1(";;           (@return \"Return value\")", ";;           (@return \"Return value\")")
   Call: (272) [apply] apply:maplist_([1628, 0], _456556, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1628, 0], [_494552|_494554], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1628, _494552)
^  Unify: (273) [user] mfix_vars1(1628, _494552)
   Call: (274) [system] var(1628)
^  Redo: (273) [user] mfix_vars1(1628, _494552)
^  Unify: (273) [user] mfix_vars1(1628, '$VAR'(_499198))
   Call: (274) [system] atom(1628)
^  Redo: (273) [user] mfix_vars1(1628, _494552)
^  Unify: (273) [user] mfix_vars1(1628, _494552)
   Call: (274) [system] 1628==true
^  Redo: (273) [user] mfix_vars1(1628, _494552)
^  Unify: (273) [user] mfix_vars1(1628, _494552)
   Call: (274) [system] 1628==false
^  Redo: (273) [user] mfix_vars1(1628, _494552)
^  Unify: (273) [user] mfix_vars1(1628, _494552)
   Call: (274) [system] 1628==[_508478, _508484]
^  Redo: (273) [user] mfix_vars1(1628, _494552)
^  Unify: (273) [user] mfix_vars1(1628, _494552)
   Call: (274) [system] is_list(1628)
^  Redo: (273) [user] mfix_vars1(1628, _494552)
^  Unify: (273) [user] mfix_vars1(1628, _494552)
   Call: (274) [system] string(1628)
^  Redo: (273) [user] mfix_vars1(1628, _494552)
^  Unify: (273) [user] mfix_vars1(1628, _494552)
   Call: (274) [system] compound(1628)
^  Redo: (273) [user] mfix_vars1(1628, _494552)
^  Unify: (273) [user] mfix_vars1(1628, _494552)
^  Call: (274) [user] symbol(1628)
^  Unify: (274) [user] symbol(1628)
   Call: (275) [system] atom(1628)
   Fail: (275) [system] atom(1628)
^  Fail: (274) [user] symbol(1628)
^  Redo: (273) [user] mfix_vars1(1628, _6036)
   Call: (274) [system] 1628=_6036
   Exit: (274) [system] 1628=1628
^  Exit: (273) [user] mfix_vars1(1628, 1628)
   Call: (273) [apply] apply:maplist_([0], _6038, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_11036|_11038], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _11036)
^  Unify: (274) [user] mfix_vars1(0, _11036)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _11036)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_15682))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _11036)
^  Unify: (274) [user] mfix_vars1(0, _11036)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _11036)
^  Unify: (274) [user] mfix_vars1(0, _11036)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _11036)
^  Unify: (274) [user] mfix_vars1(0, _11036)
   Call: (275) [system] 0==[_24962, _24968]
^  Redo: (274) [user] mfix_vars1(0, _11036)
^  Unify: (274) [user] mfix_vars1(0, _11036)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _11036)
^  Unify: (274) [user] mfix_vars1(0, _11036)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _11036)
^  Unify: (274) [user] mfix_vars1(0, _11036)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _11036)
^  Unify: (274) [user] mfix_vars1(0, _11036)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _11036)
   Call: (275) [system] 0=_11036
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _11038, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1628, 0], [1628, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;           (@return \"Return value\")", 1628, 0], [";;           (@return \"Return value\")", 1628, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@return \"Return value\")", 1628, 0], [";;           (@return \"Return value\")", 1628, 0])
   Call: (270) [system] compound_name_arguments(_5984, '$COMMENT', [";;           (@return \"Return value\")", 1628, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT', [";;           (@return \"Return value\")", 1628, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@return \"Return value\")", 1628, 0)\=@='$COMMENT'(";;           (@return \"Return value\")", 1628, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _5970)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _61210))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _61210))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _61210))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _61210))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _61210)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _61210)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _66796))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _66796))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _66796)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _66796)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _66796)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@return \"Return value\")", 1628, 0)\=@='$COMMENT'(";;           (@return \"Return value\")", 1628, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _61210)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _89116))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _89116))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _89116)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _89116)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _89116)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@return \"Return value\")", 1628, 0)\=@='$COMMENT'(";;           (@return \"Return value\")", 1628, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0)))
   Call: (261) [system] '$COMMENT'(";;           (@return \"Return value\")", 1628, 0)\=@='$COMMENT'(";;           (@return \"Return value\")", 1628, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _117894, [], _117896)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _117894, [], _117896)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _117894, [], _117896)
   Call: (258) [system] atom('$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _117894, [], _117896)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _117894, [], _117896)
   Call: (258) [system] compound('$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
   Exit: (258) [system] compound('$COMMENT'(";;           (@return \"Return value\")", 1628, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), _127210, _127212)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT', [";;           (@return \"Return value\")", 1628, 0])
^  Call: (258) [user] subst_vars([";;           (@return \"Return value\")", 1628, 0], _129096, [], _117896)
^  Unify: (258) [user] subst_vars([";;           (@return \"Return value\")", 1628, 0], [";;           (@return \"Return value\")", 1628, 0], [], [])
   Call: (259) [system] var([";;           (@return \"Return value\")", 1628, 0])
^  Redo: (258) [user] subst_vars([";;           (@return \"Return value\")", 1628, 0], _129096, [], _117896)
^  Unify: (258) [user] subst_vars([";;           (@return \"Return value\")", 1628, 0], [_132832|_132834], [], _117896)
^  Call: (259) [user] subst_vars(";;           (@return \"Return value\")", _132832, [], _133772)
^  Unify: (259) [user] subst_vars(";;           (@return \"Return value\")", ";;           (@return \"Return value\")", [], [])
   Call: (260) [system] var(";;           (@return \"Return value\")")
^  Redo: (259) [user] subst_vars(";;           (@return \"Return value\")", _132832, [], _133772)
^  Unify: (259) [user] subst_vars(";;           (@return \"Return value\")", _132832, [], _133772)
   Call: (260) [system] atom(";;           (@return \"Return value\")")
^  Redo: (259) [user] subst_vars(";;           (@return \"Return value\")", _132832, [], _133772)
^  Unify: (259) [user] subst_vars(";;           (@return \"Return value\")", _132832, [], _133772)
   Call: (260) [system] compound(";;           (@return \"Return value\")")
^  Redo: (259) [user] subst_vars(";;           (@return \"Return value\")", _132832, [], _133772)
^  Unify: (259) [user] subst_vars(";;           (@return \"Return value\")", ";;           (@return \"Return value\")", [], [])
^  Exit: (259) [user] subst_vars(";;           (@return \"Return value\")", ";;           (@return \"Return value\")", [], [])
^  Call: (259) [user] subst_vars([1628, 0], _132834, [], _117896)
^  Unify: (259) [user] subst_vars([1628, 0], [1628, 0], [], [])
   Call: (260) [system] var([1628, 0])
^  Redo: (259) [user] subst_vars([1628, 0], _132834, [], _117896)
^  Unify: (259) [user] subst_vars([1628, 0], [_148704|_148706], [], _117896)
^  Call: (260) [user] subst_vars(1628, _148704, [], _149644)
^  Unify: (260) [user] subst_vars(1628, 1628, [], [])
   Call: (261) [system] var(1628)
^  Redo: (260) [user] subst_vars(1628, _148704, [], _149644)
^  Unify: (260) [user] subst_vars(1628, _148704, [], _149644)
   Call: (261) [system] atom(1628)
^  Redo: (260) [user] subst_vars(1628, _148704, [], _149644)
^  Unify: (260) [user] subst_vars(1628, _148704, [], _149644)
   Call: (261) [system] compound(1628)
^  Redo: (260) [user] subst_vars(1628, _148704, [], _149644)
^  Unify: (260) [user] subst_vars(1628, 1628, [], [])
^  Exit: (260) [user] subst_vars(1628, 1628, [], [])
^  Call: (260) [user] subst_vars([0], _148706, [], _117896)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _148706, [], _117896)
^  Unify: (260) [user] subst_vars([0], [_164576|_164578], [], _117896)
^  Call: (261) [user] subst_vars(0, _164576, [], _165516)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _164576, [], _165516)
^  Unify: (261) [user] subst_vars(0, _164576, [], _165516)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _164576, [], _165516)
^  Unify: (261) [user] subst_vars(0, _164576, [], _165516)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _164576, [], _165516)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _164578, [], _117896)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _164578, [], _117896)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1628, 0], [1628, 0], [], [])
^  Exit: (258) [user] subst_vars([";;           (@return \"Return value\")", 1628, 0], [";;           (@return \"Return value\")", 1628, 0], [], [])
   Call: (258) [system] compound_name_arguments(_117894, '$COMMENT', [";;           (@return \"Return value\")", 1628, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT', [";;           (@return \"Return value\")", 1628, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1628, 0), '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), [], [])
   Call: (257) [system] _187934=metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1628, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1629, 0, 58401, '$COMMENT'(";;         )", 1629, 0), '$stream_position'(58401, 1629, 0, 58435)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         )", 1629, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         )", 1629, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         )", 1629, 0), _240652))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         )", 1629, 0), _240652))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         )", 1629, 0), _240652)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         )", 1629, 0), _240652)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         )", 1629, 0), _240652)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         )", 1629, 0), _240652)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         )", 1629, 0), _246264))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         )", 1629, 0), _246264))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         )", 1629, 0), _246264))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         )", 1629, 0), _246264))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         )", 1629, 0), _246264)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         )", 1629, 0), _246264)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         )", 1629, 0), _251850))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         )", 1629, 0), _251850))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         )", 1629, 0), _251850)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         )", 1629, 0), _251850)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1629, 0), _251850)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1629, 0), _251850)
   Call: (270) [system] var('$COMMENT'(";;         )", 1629, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1629, 0), _251850)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1629, 0), '$VAR'(_259310))
   Call: (270) [system] atom('$COMMENT'(";;         )", 1629, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1629, 0), _251850)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1629, 0), _251850)
   Call: (270) [system] '$COMMENT'(";;         )", 1629, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1629, 0), _251850)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1629, 0), _251850)
   Call: (270) [system] '$COMMENT'(";;         )", 1629, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1629, 0), _251850)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1629, 0), _251850)
   Call: (270) [system] '$COMMENT'(";;         )", 1629, 0)==[_268590, _268596]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1629, 0), _251850)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1629, 0), _251850)
   Call: (270) [system] is_list('$COMMENT'(";;         )", 1629, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1629, 0), _251850)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1629, 0), _251850)
   Call: (270) [system] string('$COMMENT'(";;         )", 1629, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1629, 0), _251850)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1629, 0), _251850)
   Call: (270) [system] compound('$COMMENT'(";;         )", 1629, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         )", 1629, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         )", 1629, 0), _278792, _278794)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         )", 1629, 0), '$COMMENT', [";;         )", 1629, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         )", 1629, 0], _282534)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         )", 1629, 0], _282534)
   Call: (271) [apply] apply:maplist_([";;         )", 1629, 0], _282534, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         )", 1629, 0], [_285352|_285354], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         )", _285352)
^  Unify: (272) [user] mfix_vars1(";;         )", _285352)
   Call: (273) [system] var(";;         )")
^  Redo: (272) [user] mfix_vars1(";;         )", _285352)
^  Unify: (272) [user] mfix_vars1(";;         )", '$VAR'(_289998))
   Call: (273) [system] atom(";;         )")
^  Redo: (272) [user] mfix_vars1(";;         )", _285352)
^  Unify: (272) [user] mfix_vars1(";;         )", _285352)
   Call: (273) [system] ";;         )"==true
^  Redo: (272) [user] mfix_vars1(";;         )", _285352)
^  Unify: (272) [user] mfix_vars1(";;         )", _285352)
   Call: (273) [system] ";;         )"==false
^  Redo: (272) [user] mfix_vars1(";;         )", _285352)
^  Unify: (272) [user] mfix_vars1(";;         )", _285352)
   Call: (273) [system] ";;         )"==[_299278, _299284]
^  Redo: (272) [user] mfix_vars1(";;         )", _285352)
^  Unify: (272) [user] mfix_vars1(";;         )", _285352)
   Call: (273) [system] is_list(";;         )")
^  Redo: (272) [user] mfix_vars1(";;         )", _285352)
^  Unify: (272) [user] mfix_vars1(";;         )", _285352)
   Call: (273) [system] string(";;         )")
   Exit: (273) [system] string(";;         )")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         )", _285352)
^  Unify: (272) [user] mfix_vars1(";;         )", _285352)
   Call: (273) [system] compound(";;         )")
^  Redo: (272) [user] mfix_vars1(";;         )", _285352)
^  Unify: (272) [user] mfix_vars1(";;         )", _285352)
^  Call: (273) [user] symbol(";;         )")
^  Unify: (273) [user] symbol(";;         )")
   Call: (274) [system] atom(";;         )")
   Fail: (274) [system] atom(";;         )")
^  Fail: (273) [user] symbol(";;         )")
^  Redo: (272) [user] mfix_vars1(";;         )", _285352)
   Call: (273) [system] ";;         )"=_285352
   Exit: (273) [system] ";;         )"=";;         )"
^  Exit: (272) [user] mfix_vars1(";;         )", ";;         )")
   Call: (272) [apply] apply:maplist_([1629, 0], _285354, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1629, 0], [_323350|_323352], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1629, _323350)
^  Unify: (273) [user] mfix_vars1(1629, _323350)
   Call: (274) [system] var(1629)
^  Redo: (273) [user] mfix_vars1(1629, _323350)
^  Unify: (273) [user] mfix_vars1(1629, '$VAR'(_327996))
   Call: (274) [system] atom(1629)
^  Redo: (273) [user] mfix_vars1(1629, _323350)
^  Unify: (273) [user] mfix_vars1(1629, _323350)
   Call: (274) [system] 1629==true
^  Redo: (273) [user] mfix_vars1(1629, _323350)
^  Unify: (273) [user] mfix_vars1(1629, _323350)
   Call: (274) [system] 1629==false
^  Redo: (273) [user] mfix_vars1(1629, _323350)
^  Unify: (273) [user] mfix_vars1(1629, _323350)
   Call: (274) [system] 1629==[_337276, _337282]
^  Redo: (273) [user] mfix_vars1(1629, _323350)
^  Unify: (273) [user] mfix_vars1(1629, _323350)
   Call: (274) [system] is_list(1629)
^  Redo: (273) [user] mfix_vars1(1629, _323350)
^  Unify: (273) [user] mfix_vars1(1629, _323350)
   Call: (274) [system] string(1629)
^  Redo: (273) [user] mfix_vars1(1629, _323350)
^  Unify: (273) [user] mfix_vars1(1629, _323350)
   Call: (274) [system] compound(1629)
^  Redo: (273) [user] mfix_vars1(1629, _323350)
^  Unify: (273) [user] mfix_vars1(1629, _323350)
^  Call: (274) [user] symbol(1629)
^  Unify: (274) [user] symbol(1629)
   Call: (275) [system] atom(1629)
   Fail: (275) [system] atom(1629)
^  Fail: (274) [user] symbol(1629)
^  Redo: (273) [user] mfix_vars1(1629, _323350)
   Call: (274) [system] 1629=_323350
   Exit: (274) [system] 1629=1629
^  Exit: (273) [user] mfix_vars1(1629, 1629)
   Call: (273) [apply] apply:maplist_([0], _323352, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_357676|_357678], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _357676)
^  Unify: (274) [user] mfix_vars1(0, _357676)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _357676)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_362322))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _357676)
^  Unify: (274) [user] mfix_vars1(0, _357676)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _357676)
^  Unify: (274) [user] mfix_vars1(0, _357676)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _357676)
^  Unify: (274) [user] mfix_vars1(0, _357676)
   Call: (275) [system] 0==[_371602, _371608]
^  Redo: (274) [user] mfix_vars1(0, _357676)
^  Unify: (274) [user] mfix_vars1(0, _357676)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _357676)
^  Unify: (274) [user] mfix_vars1(0, _357676)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _357676)
^  Unify: (274) [user] mfix_vars1(0, _357676)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _357676)
^  Unify: (274) [user] mfix_vars1(0, _357676)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _357676)
   Call: (275) [system] 0=_357676
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _357678, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1629, 0], [1629, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         )", 1629, 0], [";;         )", 1629, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         )", 1629, 0], [";;         )", 1629, 0])
   Call: (270) [system] compound_name_arguments(_251850, '$COMMENT', [";;         )", 1629, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         )", 1629, 0), '$COMMENT', [";;         )", 1629, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0)))
   Call: (267) [system] '$COMMENT'(";;         )", 1629, 0)\=@='$COMMENT'(";;         )", 1629, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         )", 1629, 0), _246264)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         )", 1629, 0), _407850))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         )", 1629, 0), _407850))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         )", 1629, 0), _407850))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         )", 1629, 0), _407850))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         )", 1629, 0), _407850)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         )", 1629, 0), _407850)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         )", 1629, 0), _413436))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         )", 1629, 0), _413436))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         )", 1629, 0), _413436)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         )", 1629, 0), _413436)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         )", 1629, 0), _413436)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0)))
   Call: (267) [system] '$COMMENT'(";;         )", 1629, 0)\=@='$COMMENT'(";;         )", 1629, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         )", 1629, 0), _407850)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         )", 1629, 0), _240652))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         )", 1629, 0), _240652))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         )", 1629, 0), _240652))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         )", 1629, 0), _240652))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         )", 1629, 0), _240652)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         )", 1629, 0), _240652)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         )", 1629, 0), _435756))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         )", 1629, 0), _435756))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         )", 1629, 0), _435756)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         )", 1629, 0), _435756)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         )", 1629, 0), _435756)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0)))
   Call: (267) [system] '$COMMENT'(";;         )", 1629, 0)\=@='$COMMENT'(";;         )", 1629, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         )", 1629, 0), _240652)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0)))
   Call: (261) [system] '$COMMENT'(";;         )", 1629, 0)\=@='$COMMENT'(";;         )", 1629, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         )", 1629, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         )", 1629, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         )", 1629, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         )", 1629, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         )", 1629, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         )", 1629, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         )", 1629, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         )", 1629, 0), _464534, [], _464536)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         )", 1629, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         )", 1629, 0), _464534, [], _464536)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         )", 1629, 0), _464534, [], _464536)
   Call: (258) [system] atom('$COMMENT'(";;         )", 1629, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         )", 1629, 0), _464534, [], _464536)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         )", 1629, 0), _464534, [], _464536)
   Call: (258) [system] compound('$COMMENT'(";;         )", 1629, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         )", 1629, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         )", 1629, 0), _473850, _473852)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         )", 1629, 0), '$COMMENT', [";;         )", 1629, 0])
^  Call: (258) [user] subst_vars([";;         )", 1629, 0], _475736, [], _464536)
^  Unify: (258) [user] subst_vars([";;         )", 1629, 0], [";;         )", 1629, 0], [], [])
   Call: (259) [system] var([";;         )", 1629, 0])
^  Redo: (258) [user] subst_vars([";;         )", 1629, 0], _475736, [], _464536)
^  Unify: (258) [user] subst_vars([";;         )", 1629, 0], [_479472|_479474], [], _464536)
^  Call: (259) [user] subst_vars(";;         )", _479472, [], _480412)
^  Unify: (259) [user] subst_vars(";;         )", ";;         )", [], [])
   Call: (260) [system] var(";;         )")
^  Redo: (259) [user] subst_vars(";;         )", _479472, [], _480412)
^  Unify: (259) [user] subst_vars(";;         )", _479472, [], _480412)
   Call: (260) [system] atom(";;         )")
^  Redo: (259) [user] subst_vars(";;         )", _479472, [], _480412)
^  Unify: (259) [user] subst_vars(";;         )", _479472, [], _480412)
   Call: (260) [system] compound(";;         )")
^  Redo: (259) [user] subst_vars(";;         )", _479472, [], _480412)
^  Unify: (259) [user] subst_vars(";;         )", ";;         )", [], [])
^  Exit: (259) [user] subst_vars(";;         )", ";;         )", [], [])
^  Call: (259) [user] subst_vars([1629, 0], _479474, [], _464536)
^  Unify: (259) [user] subst_vars([1629, 0], [1629, 0], [], [])
   Call: (260) [system] var([1629, 0])
^  Redo: (259) [user] subst_vars([1629, 0], _479474, [], _464536)
^  Unify: (259) [user] subst_vars([1629, 0], [_495344|_495346], [], _464536)
^  Call: (260) [user] subst_vars(1629, _495344, [], _496284)
^  Unify: (260) [user] subst_vars(1629, 1629, [], [])
   Call: (261) [system] var(1629)
^  Redo: (260) [user] subst_vars(1629, _495344, [], _496284)
^  Unify: (260) [user] subst_vars(1629, _495344, [], _496284)
   Call: (261) [system] atom(1629)
^  Redo: (260) [user] subst_vars(1629, _495344, [], _496284)
^  Unify: (260) [user] subst_vars(1629, _495344, [], _496284)
   Call: (261) [system] compound(1629)
^  Redo: (260) [user] subst_vars(1629, _495344, [], _496284)
^  Unify: (260) [user] subst_vars(1629, 1629, [], [])
^  Exit: (260) [user] subst_vars(1629, 1629, [], [])
^  Call: (260) [user] subst_vars([0], _495346, [], _464536)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _495346, [], _464536)
^  Unify: (260) [user] subst_vars([0], [_511216|_511218], [], _464536)
^  Call: (261) [user] subst_vars(0, _511216, [], _512156)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _511216, [], _512156)
^  Unify: (261) [user] subst_vars(0, _511216, [], _512156)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _511216, [], _512156)
^  Unify: (261) [user] subst_vars(0, _511216, [], _512156)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _511216, [], _512156)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _5986, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _5986, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1629, 0], [1629, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         )", 1629, 0], [";;         )", 1629, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5938, '$COMMENT', [";;         )", 1629, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         )", 1629, 0), '$COMMENT', [";;         )", 1629, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         )", 1629, 0), '$COMMENT'(";;         )", 1629, 0), [], [])
   Call: (257) [system] _16632=metta_file_buffer(+, '$COMMENT'(";;         )", 1629, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         )", 1629, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         )", 1629, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         )", 1629, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         )", 1629, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         )", 1629, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         )", 1629, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         )", 1629, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         )", 1629, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1630, 0, 58414, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$stream_position'(58414, 1630, 0, 58448)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _69356))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _69356))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _69356)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _69356)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _69356)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _69356)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _74968))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _74968))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _74968))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _74968))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _74968)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _74968)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _80554))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _80554))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _80554)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _80554)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _80554)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _80554)
   Call: (270) [system] var('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _80554)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$VAR'(_88014))
   Call: (270) [system] atom('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _80554)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _80554)
   Call: (270) [system] '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _80554)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _80554)
   Call: (270) [system] '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _80554)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _80554)
   Call: (270) [system] '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0)==[_97294, _97300]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _80554)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _80554)
   Call: (270) [system] is_list('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _80554)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _80554)
   Call: (270) [system] string('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _80554)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _80554)
   Call: (270) [system] compound('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _107496, _107498)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT', [";;         !(get-doc some-gnd-atom)", 1630, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         !(get-doc some-gnd-atom)", 1630, 0], _111238)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(get-doc some-gnd-atom)", 1630, 0], _111238)
   Call: (271) [apply] apply:maplist_([";;         !(get-doc some-gnd-atom)", 1630, 0], _111238, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         !(get-doc some-gnd-atom)", 1630, 0], [_114056|_114058], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         !(get-doc some-gnd-atom)", _114056)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-gnd-atom)", _114056)
   Call: (273) [system] var(";;         !(get-doc some-gnd-atom)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-gnd-atom)", _114056)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-gnd-atom)", '$VAR'(_118702))
   Call: (273) [system] atom(";;         !(get-doc some-gnd-atom)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-gnd-atom)", _114056)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-gnd-atom)", _114056)
   Call: (273) [system] ";;         !(get-doc some-gnd-atom)"==true
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-gnd-atom)", _114056)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-gnd-atom)", _114056)
   Call: (273) [system] ";;         !(get-doc some-gnd-atom)"==false
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-gnd-atom)", _114056)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-gnd-atom)", _114056)
   Call: (273) [system] ";;         !(get-doc some-gnd-atom)"==[_127982, _127988]
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-gnd-atom)", _114056)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-gnd-atom)", _114056)
   Call: (273) [system] is_list(";;         !(get-doc some-gnd-atom)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-gnd-atom)", _114056)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-gnd-atom)", _114056)
   Call: (273) [system] string(";;         !(get-doc some-gnd-atom)")
   Exit: (273) [system] string(";;         !(get-doc some-gnd-atom)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-gnd-atom)", _114056)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-gnd-atom)", _114056)
   Call: (273) [system] compound(";;         !(get-doc some-gnd-atom)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-gnd-atom)", _114056)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-gnd-atom)", _114056)
^  Call: (273) [user] symbol(";;         !(get-doc some-gnd-atom)")
^  Unify: (273) [user] symbol(";;         !(get-doc some-gnd-atom)")
   Call: (274) [system] atom(";;         !(get-doc some-gnd-atom)")
   Fail: (274) [system] atom(";;         !(get-doc some-gnd-atom)")
^  Fail: (273) [user] symbol(";;         !(get-doc some-gnd-atom)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-gnd-atom)", _114056)
   Call: (273) [system] ";;         !(get-doc some-gnd-atom)"=_114056
   Exit: (273) [system] ";;         !(get-doc some-gnd-atom)"=";;         !(get-doc some-gnd-atom)"
^  Exit: (272) [user] mfix_vars1(";;         !(get-doc some-gnd-atom)", ";;         !(get-doc some-gnd-atom)")
   Call: (272) [apply] apply:maplist_([1630, 0], _114058, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1630, 0], [_152054|_152056], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1630, _152054)
^  Unify: (273) [user] mfix_vars1(1630, _152054)
   Call: (274) [system] var(1630)
^  Redo: (273) [user] mfix_vars1(1630, _152054)
^  Unify: (273) [user] mfix_vars1(1630, '$VAR'(_156700))
   Call: (274) [system] atom(1630)
^  Redo: (273) [user] mfix_vars1(1630, _152054)
^  Unify: (273) [user] mfix_vars1(1630, _152054)
   Call: (274) [system] 1630==true
^  Redo: (273) [user] mfix_vars1(1630, _152054)
^  Unify: (273) [user] mfix_vars1(1630, _152054)
   Call: (274) [system] 1630==false
^  Redo: (273) [user] mfix_vars1(1630, _152054)
^  Unify: (273) [user] mfix_vars1(1630, _152054)
   Call: (274) [system] 1630==[_165980, _165986]
^  Redo: (273) [user] mfix_vars1(1630, _152054)
^  Unify: (273) [user] mfix_vars1(1630, _152054)
   Call: (274) [system] is_list(1630)
^  Redo: (273) [user] mfix_vars1(1630, _152054)
^  Unify: (273) [user] mfix_vars1(1630, _152054)
   Call: (274) [system] string(1630)
^  Redo: (273) [user] mfix_vars1(1630, _152054)
^  Unify: (273) [user] mfix_vars1(1630, _152054)
   Call: (274) [system] compound(1630)
^  Redo: (273) [user] mfix_vars1(1630, _152054)
^  Unify: (273) [user] mfix_vars1(1630, _152054)
^  Call: (274) [user] symbol(1630)
^  Unify: (274) [user] symbol(1630)
   Call: (275) [system] atom(1630)
   Fail: (275) [system] atom(1630)
^  Fail: (274) [user] symbol(1630)
^  Redo: (273) [user] mfix_vars1(1630, _152054)
   Call: (274) [system] 1630=_152054
   Exit: (274) [system] 1630=1630
^  Exit: (273) [user] mfix_vars1(1630, 1630)
   Call: (273) [apply] apply:maplist_([0], _152056, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_186380|_186382], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _186380)
^  Unify: (274) [user] mfix_vars1(0, _186380)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _186380)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_191026))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _186380)
^  Unify: (274) [user] mfix_vars1(0, _186380)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _186380)
^  Unify: (274) [user] mfix_vars1(0, _186380)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _186380)
^  Unify: (274) [user] mfix_vars1(0, _186380)
   Call: (275) [system] 0==[_200306, _200312]
^  Redo: (274) [user] mfix_vars1(0, _186380)
^  Unify: (274) [user] mfix_vars1(0, _186380)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _186380)
^  Unify: (274) [user] mfix_vars1(0, _186380)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _186380)
^  Unify: (274) [user] mfix_vars1(0, _186380)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _186380)
^  Unify: (274) [user] mfix_vars1(0, _186380)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _186380)
   Call: (275) [system] 0=_186380
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _186382, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1630, 0], [1630, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         !(get-doc some-gnd-atom)", 1630, 0], [";;         !(get-doc some-gnd-atom)", 1630, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(get-doc some-gnd-atom)", 1630, 0], [";;         !(get-doc some-gnd-atom)", 1630, 0])
   Call: (270) [system] compound_name_arguments(_80554, '$COMMENT', [";;         !(get-doc some-gnd-atom)", 1630, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT', [";;         !(get-doc some-gnd-atom)", 1630, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0)\=@='$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _74968)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _236554))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _236554))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _236554))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _236554))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _236554)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _236554)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _242140))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _242140))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _242140)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _242140)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _242140)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0)\=@='$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _236554)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _69356))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _69356))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _69356))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _69356))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _69356)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _69356)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _264460))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _264460))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _264460)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _264460)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _264460)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0)\=@='$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _69356)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0)))
   Call: (261) [system] '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0)\=@='$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _293238, [], _293240)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _293238, [], _293240)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _293238, [], _293240)
   Call: (258) [system] atom('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _293238, [], _293240)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _293238, [], _293240)
   Call: (258) [system] compound('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), _302554, _302556)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT', [";;         !(get-doc some-gnd-atom)", 1630, 0])
^  Call: (258) [user] subst_vars([";;         !(get-doc some-gnd-atom)", 1630, 0], _304440, [], _293240)
^  Unify: (258) [user] subst_vars([";;         !(get-doc some-gnd-atom)", 1630, 0], [";;         !(get-doc some-gnd-atom)", 1630, 0], [], [])
   Call: (259) [system] var([";;         !(get-doc some-gnd-atom)", 1630, 0])
^  Redo: (258) [user] subst_vars([";;         !(get-doc some-gnd-atom)", 1630, 0], _304440, [], _293240)
^  Unify: (258) [user] subst_vars([";;         !(get-doc some-gnd-atom)", 1630, 0], [_308176|_308178], [], _293240)
^  Call: (259) [user] subst_vars(";;         !(get-doc some-gnd-atom)", _308176, [], _309116)
^  Unify: (259) [user] subst_vars(";;         !(get-doc some-gnd-atom)", ";;         !(get-doc some-gnd-atom)", [], [])
   Call: (260) [system] var(";;         !(get-doc some-gnd-atom)")
^  Redo: (259) [user] subst_vars(";;         !(get-doc some-gnd-atom)", _308176, [], _309116)
^  Unify: (259) [user] subst_vars(";;         !(get-doc some-gnd-atom)", _308176, [], _309116)
   Call: (260) [system] atom(";;         !(get-doc some-gnd-atom)")
^  Redo: (259) [user] subst_vars(";;         !(get-doc some-gnd-atom)", _308176, [], _309116)
^  Unify: (259) [user] subst_vars(";;         !(get-doc some-gnd-atom)", _308176, [], _309116)
   Call: (260) [system] compound(";;         !(get-doc some-gnd-atom)")
^  Redo: (259) [user] subst_vars(";;         !(get-doc some-gnd-atom)", _308176, [], _309116)
^  Unify: (259) [user] subst_vars(";;         !(get-doc some-gnd-atom)", ";;         !(get-doc some-gnd-atom)", [], [])
^  Exit: (259) [user] subst_vars(";;         !(get-doc some-gnd-atom)", ";;         !(get-doc some-gnd-atom)", [], [])
^  Call: (259) [user] subst_vars([1630, 0], _308178, [], _293240)
^  Unify: (259) [user] subst_vars([1630, 0], [1630, 0], [], [])
   Call: (260) [system] var([1630, 0])
^  Redo: (259) [user] subst_vars([1630, 0], _308178, [], _293240)
^  Unify: (259) [user] subst_vars([1630, 0], [_324048|_324050], [], _293240)
^  Call: (260) [user] subst_vars(1630, _324048, [], _324988)
^  Unify: (260) [user] subst_vars(1630, 1630, [], [])
   Call: (261) [system] var(1630)
^  Redo: (260) [user] subst_vars(1630, _324048, [], _324988)
^  Unify: (260) [user] subst_vars(1630, _324048, [], _324988)
   Call: (261) [system] atom(1630)
^  Redo: (260) [user] subst_vars(1630, _324048, [], _324988)
^  Unify: (260) [user] subst_vars(1630, _324048, [], _324988)
   Call: (261) [system] compound(1630)
^  Redo: (260) [user] subst_vars(1630, _324048, [], _324988)
^  Unify: (260) [user] subst_vars(1630, 1630, [], [])
^  Exit: (260) [user] subst_vars(1630, 1630, [], [])
^  Call: (260) [user] subst_vars([0], _324050, [], _293240)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _324050, [], _293240)
^  Unify: (260) [user] subst_vars([0], [_339920|_339922], [], _293240)
^  Call: (261) [user] subst_vars(0, _339920, [], _340860)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _339920, [], _340860)
^  Unify: (261) [user] subst_vars(0, _339920, [], _340860)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _339920, [], _340860)
^  Unify: (261) [user] subst_vars(0, _339920, [], _340860)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _339920, [], _340860)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _339922, [], _293240)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _339922, [], _293240)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1630, 0], [1630, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         !(get-doc some-gnd-atom)", 1630, 0], [";;         !(get-doc some-gnd-atom)", 1630, 0], [], [])
   Call: (258) [system] compound_name_arguments(_293238, '$COMMENT', [";;         !(get-doc some-gnd-atom)", 1630, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT', [";;         !(get-doc some-gnd-atom)", 1630, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), [], [])
   Call: (257) [system] _363278=metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-gnd-atom)", 1630, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1631, 0, 58450, '$COMMENT'(";;     \"#);", 1631, 0), '$stream_position'(58450, 1631, 0, 58484)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1631, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1631, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1631, 0), _415996))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1631, 0), _415996))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1631, 0), _415996)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     \"#);", 1631, 0), _415996)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     \"#);", 1631, 0), _415996)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     \"#);", 1631, 0), _415996)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1631, 0), _421608))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1631, 0), _421608))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1631, 0), _421608))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1631, 0), _421608))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1631, 0), _421608)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1631, 0), _421608)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     \"#);", 1631, 0), _427194))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     \"#);", 1631, 0), _427194))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     \"#);", 1631, 0), _427194)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     \"#);", 1631, 0), _427194)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1631, 0), _427194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1631, 0), _427194)
   Call: (270) [system] var('$COMMENT'(";;     \"#);", 1631, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1631, 0), _427194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1631, 0), '$VAR'(_434654))
   Call: (270) [system] atom('$COMMENT'(";;     \"#);", 1631, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1631, 0), _427194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1631, 0), _427194)
   Call: (270) [system] '$COMMENT'(";;     \"#);", 1631, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1631, 0), _427194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1631, 0), _427194)
   Call: (270) [system] '$COMMENT'(";;     \"#);", 1631, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1631, 0), _427194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1631, 0), _427194)
   Call: (270) [system] '$COMMENT'(";;     \"#);", 1631, 0)==[_443934, _443940]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1631, 0), _427194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1631, 0), _427194)
   Call: (270) [system] is_list('$COMMENT'(";;     \"#);", 1631, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1631, 0), _427194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1631, 0), _427194)
   Call: (270) [system] string('$COMMENT'(";;     \"#);", 1631, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1631, 0), _427194)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1631, 0), _427194)
   Call: (270) [system] compound('$COMMENT'(";;     \"#);", 1631, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     \"#);", 1631, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1631, 0), _454136, _454138)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT', [";;     \"#);", 1631, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     \"#);", 1631, 0], _457878)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     \"#);", 1631, 0], _457878)
   Call: (271) [apply] apply:maplist_([";;     \"#);", 1631, 0], _457878, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     \"#);", 1631, 0], [_460696|_460698], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     \"#);", _460696)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _460696)
   Call: (273) [system] var(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _460696)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", '$VAR'(_465342))
   Call: (273) [system] atom(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _460696)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _460696)
   Call: (273) [system] ";;     \"#);"==true
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _460696)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _460696)
   Call: (273) [system] ";;     \"#);"==false
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _460696)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _460696)
   Call: (273) [system] ";;     \"#);"==[_474622, _474628]
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _460696)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _460696)
   Call: (273) [system] is_list(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _460696)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _460696)
   Call: (273) [system] string(";;     \"#);")
   Exit: (273) [system] string(";;     \"#);")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _460696)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _460696)
   Call: (273) [system] compound(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _460696)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _460696)
^  Call: (273) [user] symbol(";;     \"#);")
^  Unify: (273) [user] symbol(";;     \"#);")
   Call: (274) [system] atom(";;     \"#);")
   Fail: (274) [system] atom(";;     \"#);")
^  Fail: (273) [user] symbol(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _460696)
   Call: (273) [system] ";;     \"#);"=_460696
   Exit: (273) [system] ";;     \"#);"=";;     \"#);"
^  Exit: (272) [user] mfix_vars1(";;     \"#);", ";;     \"#);")
   Call: (272) [apply] apply:maplist_([1631, 0], _460698, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1631, 0], [_498694|_498696], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1631, _498694)
^  Unify: (273) [user] mfix_vars1(1631, _498694)
   Call: (274) [system] var(1631)
^  Redo: (273) [user] mfix_vars1(1631, _498694)
^  Unify: (273) [user] mfix_vars1(1631, '$VAR'(_503340))
   Call: (274) [system] atom(1631)
^  Redo: (273) [user] mfix_vars1(1631, _498694)
^  Unify: (273) [user] mfix_vars1(1631, _498694)
   Call: (274) [system] 1631==true
^  Redo: (273) [user] mfix_vars1(1631, _498694)
^  Unify: (273) [user] mfix_vars1(1631, _498694)
   Call: (274) [system] 1631==false
^  Redo: (273) [user] mfix_vars1(1631, _498694)
^  Unify: (273) [user] mfix_vars1(1631, _498694)
   Call: (274) [system] 1631==[_512620, _512626]
^  Redo: (273) [user] mfix_vars1(1631, _498694)
^  Unify: (273) [user] mfix_vars1(1631, _498694)
   Call: (274) [system] is_list(1631)
^  Redo: (273) [user] mfix_vars1(1631, _498694)
^  Unify: (273) [user] mfix_vars1(1631, _498694)
   Call: (274) [system] string(1631)
^  Redo: (273) [user] mfix_vars1(1631, _498694)
^  Unify: (273) [user] mfix_vars1(1631, _498694)
   Call: (274) [system] compound(1631)
^  Redo: (273) [user] mfix_vars1(1631, _498694)
^  Unify: (273) [user] mfix_vars1(1631, _498694)
^  Call: (274) [user] symbol(1631)
^  Unify: (274) [user] symbol(1631)
   Call: (275) [system] atom(1631)
   Fail: (275) [system] atom(1631)
^  Fail: (274) [user] symbol(1631)
^  Redo: (273) [user] mfix_vars1(1631, _6030)
   Call: (274) [system] 1631=_6030
   Exit: (274) [system] 1631=1631
^  Exit: (273) [user] mfix_vars1(1631, 1631)
   Call: (273) [apply] apply:maplist_([0], _6032, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_15122|_15124], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _15122)
^  Unify: (274) [user] mfix_vars1(0, _15122)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _15122)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_19768))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _15122)
^  Unify: (274) [user] mfix_vars1(0, _15122)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _15122)
^  Unify: (274) [user] mfix_vars1(0, _15122)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _15122)
^  Unify: (274) [user] mfix_vars1(0, _15122)
   Call: (275) [system] 0==[_29048, _29054]
^  Redo: (274) [user] mfix_vars1(0, _15122)
^  Unify: (274) [user] mfix_vars1(0, _15122)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _15122)
^  Unify: (274) [user] mfix_vars1(0, _15122)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _15122)
^  Unify: (274) [user] mfix_vars1(0, _15122)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _15122)
^  Unify: (274) [user] mfix_vars1(0, _15122)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _15122)
   Call: (275) [system] 0=_15122
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _15124, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1631, 0], [1631, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     \"#);", 1631, 0], [";;     \"#);", 1631, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     \"#);", 1631, 0], [";;     \"#);", 1631, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";;     \"#);", 1631, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT', [";;     \"#);", 1631, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0)))
   Call: (267) [system] '$COMMENT'(";;     \"#);", 1631, 0)\=@='$COMMENT'(";;     \"#);", 1631, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1631, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     \"#);", 1631, 0), _65296))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1631, 0), _65296))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1631, 0), _65296))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1631, 0), _65296))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1631, 0), _65296)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1631, 0), _65296)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     \"#);", 1631, 0), _70882))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     \"#);", 1631, 0), _70882))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     \"#);", 1631, 0), _70882)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     \"#);", 1631, 0), _70882)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     \"#);", 1631, 0), _70882)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0)))
   Call: (267) [system] '$COMMENT'(";;     \"#);", 1631, 0)\=@='$COMMENT'(";;     \"#);", 1631, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1631, 0), _65296)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     \"#);", 1631, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1631, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1631, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1631, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1631, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1631, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     \"#);", 1631, 0), _93202))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     \"#);", 1631, 0), _93202))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     \"#);", 1631, 0), _93202)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     \"#);", 1631, 0), _93202)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     \"#);", 1631, 0), _93202)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0)))
   Call: (267) [system] '$COMMENT'(";;     \"#);", 1631, 0)\=@='$COMMENT'(";;     \"#);", 1631, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1631, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0)))
   Call: (261) [system] '$COMMENT'(";;     \"#);", 1631, 0)\=@='$COMMENT'(";;     \"#);", 1631, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1631, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1631, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1631, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1631, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1631, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1631, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1631, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1631, 0), _121980, [], _121982)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     \"#);", 1631, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1631, 0), _121980, [], _121982)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1631, 0), _121980, [], _121982)
   Call: (258) [system] atom('$COMMENT'(";;     \"#);", 1631, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1631, 0), _121980, [], _121982)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1631, 0), _121980, [], _121982)
   Call: (258) [system] compound('$COMMENT'(";;     \"#);", 1631, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     \"#);", 1631, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1631, 0), _131296, _131298)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT', [";;     \"#);", 1631, 0])
^  Call: (258) [user] subst_vars([";;     \"#);", 1631, 0], _133182, [], _121982)
^  Unify: (258) [user] subst_vars([";;     \"#);", 1631, 0], [";;     \"#);", 1631, 0], [], [])
   Call: (259) [system] var([";;     \"#);", 1631, 0])
^  Redo: (258) [user] subst_vars([";;     \"#);", 1631, 0], _133182, [], _121982)
^  Unify: (258) [user] subst_vars([";;     \"#);", 1631, 0], [_136918|_136920], [], _121982)
^  Call: (259) [user] subst_vars(";;     \"#);", _136918, [], _137858)
^  Unify: (259) [user] subst_vars(";;     \"#);", ";;     \"#);", [], [])
   Call: (260) [system] var(";;     \"#);")
^  Redo: (259) [user] subst_vars(";;     \"#);", _136918, [], _137858)
^  Unify: (259) [user] subst_vars(";;     \"#);", _136918, [], _137858)
   Call: (260) [system] atom(";;     \"#);")
^  Redo: (259) [user] subst_vars(";;     \"#);", _136918, [], _137858)
^  Unify: (259) [user] subst_vars(";;     \"#);", _136918, [], _137858)
   Call: (260) [system] compound(";;     \"#);")
^  Redo: (259) [user] subst_vars(";;     \"#);", _136918, [], _137858)
^  Unify: (259) [user] subst_vars(";;     \"#);", ";;     \"#);", [], [])
^  Exit: (259) [user] subst_vars(";;     \"#);", ";;     \"#);", [], [])
^  Call: (259) [user] subst_vars([1631, 0], _136920, [], _121982)
^  Unify: (259) [user] subst_vars([1631, 0], [1631, 0], [], [])
   Call: (260) [system] var([1631, 0])
^  Redo: (259) [user] subst_vars([1631, 0], _136920, [], _121982)
^  Unify: (259) [user] subst_vars([1631, 0], [_152790|_152792], [], _121982)
^  Call: (260) [user] subst_vars(1631, _152790, [], _153730)
^  Unify: (260) [user] subst_vars(1631, 1631, [], [])
   Call: (261) [system] var(1631)
^  Redo: (260) [user] subst_vars(1631, _152790, [], _153730)
^  Unify: (260) [user] subst_vars(1631, _152790, [], _153730)
   Call: (261) [system] atom(1631)
^  Redo: (260) [user] subst_vars(1631, _152790, [], _153730)
^  Unify: (260) [user] subst_vars(1631, _152790, [], _153730)
   Call: (261) [system] compound(1631)
^  Redo: (260) [user] subst_vars(1631, _152790, [], _153730)
^  Unify: (260) [user] subst_vars(1631, 1631, [], [])
^  Exit: (260) [user] subst_vars(1631, 1631, [], [])
^  Call: (260) [user] subst_vars([0], _152792, [], _121982)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _152792, [], _121982)
^  Unify: (260) [user] subst_vars([0], [_168662|_168664], [], _121982)
^  Call: (261) [user] subst_vars(0, _168662, [], _169602)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _168662, [], _169602)
^  Unify: (261) [user] subst_vars(0, _168662, [], _169602)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _168662, [], _169602)
^  Unify: (261) [user] subst_vars(0, _168662, [], _169602)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _168662, [], _169602)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _168664, [], _121982)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _168664, [], _121982)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1631, 0], [1631, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     \"#);", 1631, 0], [";;     \"#);", 1631, 0], [], [])
   Call: (258) [system] compound_name_arguments(_121980, '$COMMENT', [";;     \"#);", 1631, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT', [";;     \"#);", 1631, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1631, 0), '$COMMENT'(";;     \"#);", 1631, 0), [], [])
   Call: (257) [system] _192020=metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1631, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1631, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1631, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1631, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1631, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1631, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1631, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1631, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1631, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1632, 0, 58462, '$COMMENT'(";;", 1632, 0), '$stream_position'(58462, 1632, 0, 58496)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1632, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1632, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1632, 0), _244736))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1632, 0), _244736))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1632, 0), _244736)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1632, 0), _244736)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1632, 0), _244736)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1632, 0), _244736)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1632, 0), _250348))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1632, 0), _250348))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1632, 0), _250348))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1632, 0), _250348))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1632, 0), _250348)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1632, 0), _250348)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1632, 0), _255934))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1632, 0), _255934))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1632, 0), _255934)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1632, 0), _255934)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1632, 0), _255934)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1632, 0), _255934)
   Call: (270) [system] var('$COMMENT'(";;", 1632, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1632, 0), _255934)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1632, 0), '$VAR'(_263394))
   Call: (270) [system] atom('$COMMENT'(";;", 1632, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1632, 0), _255934)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1632, 0), _255934)
   Call: (270) [system] '$COMMENT'(";;", 1632, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1632, 0), _255934)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1632, 0), _255934)
   Call: (270) [system] '$COMMENT'(";;", 1632, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1632, 0), _255934)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1632, 0), _255934)
   Call: (270) [system] '$COMMENT'(";;", 1632, 0)==[_272674, _272680]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1632, 0), _255934)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1632, 0), _255934)
   Call: (270) [system] is_list('$COMMENT'(";;", 1632, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1632, 0), _255934)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1632, 0), _255934)
   Call: (270) [system] string('$COMMENT'(";;", 1632, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1632, 0), _255934)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1632, 0), _255934)
   Call: (270) [system] compound('$COMMENT'(";;", 1632, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1632, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1632, 0), _282876, _282878)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1632, 0), '$COMMENT', [";;", 1632, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1632, 0], _286618)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1632, 0], _286618)
   Call: (271) [apply] apply:maplist_([";;", 1632, 0], _286618, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1632, 0], [_289436|_289438], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _289436)
^  Unify: (272) [user] mfix_vars1(";;", _289436)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _289436)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_294082))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _289436)
^  Unify: (272) [user] mfix_vars1(";;", _289436)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _289436)
^  Unify: (272) [user] mfix_vars1(";;", _289436)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _289436)
^  Unify: (272) [user] mfix_vars1(";;", _289436)
   Call: (273) [system] ";;"==[_303362, _303368]
^  Redo: (272) [user] mfix_vars1(";;", _289436)
^  Unify: (272) [user] mfix_vars1(";;", _289436)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _289436)
^  Unify: (272) [user] mfix_vars1(";;", _289436)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _289436)
^  Unify: (272) [user] mfix_vars1(";;", _289436)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _289436)
^  Unify: (272) [user] mfix_vars1(";;", _289436)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _289436)
   Call: (273) [system] ";;"=_289436
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1632, 0], _289438, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1632, 0], [_327434|_327436], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1632, _327434)
^  Unify: (273) [user] mfix_vars1(1632, _327434)
   Call: (274) [system] var(1632)
^  Redo: (273) [user] mfix_vars1(1632, _327434)
^  Unify: (273) [user] mfix_vars1(1632, '$VAR'(_332080))
   Call: (274) [system] atom(1632)
^  Redo: (273) [user] mfix_vars1(1632, _327434)
^  Unify: (273) [user] mfix_vars1(1632, _327434)
   Call: (274) [system] 1632==true
^  Redo: (273) [user] mfix_vars1(1632, _327434)
^  Unify: (273) [user] mfix_vars1(1632, _327434)
   Call: (274) [system] 1632==false
^  Redo: (273) [user] mfix_vars1(1632, _327434)
^  Unify: (273) [user] mfix_vars1(1632, _327434)
   Call: (274) [system] 1632==[_341360, _341366]
^  Redo: (273) [user] mfix_vars1(1632, _327434)
^  Unify: (273) [user] mfix_vars1(1632, _327434)
   Call: (274) [system] is_list(1632)
^  Redo: (273) [user] mfix_vars1(1632, _327434)
^  Unify: (273) [user] mfix_vars1(1632, _327434)
   Call: (274) [system] string(1632)
^  Redo: (273) [user] mfix_vars1(1632, _327434)
^  Unify: (273) [user] mfix_vars1(1632, _327434)
   Call: (274) [system] compound(1632)
^  Redo: (273) [user] mfix_vars1(1632, _327434)
^  Unify: (273) [user] mfix_vars1(1632, _327434)
^  Call: (274) [user] symbol(1632)
^  Unify: (274) [user] symbol(1632)
   Call: (275) [system] atom(1632)
   Fail: (275) [system] atom(1632)
^  Fail: (274) [user] symbol(1632)
^  Redo: (273) [user] mfix_vars1(1632, _327434)
   Call: (274) [system] 1632=_327434
   Exit: (274) [system] 1632=1632
^  Exit: (273) [user] mfix_vars1(1632, 1632)
   Call: (273) [apply] apply:maplist_([0], _327436, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_361760|_361762], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _361760)
^  Unify: (274) [user] mfix_vars1(0, _361760)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _361760)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_366406))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _361760)
^  Unify: (274) [user] mfix_vars1(0, _361760)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _361760)
^  Unify: (274) [user] mfix_vars1(0, _361760)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _361760)
^  Unify: (274) [user] mfix_vars1(0, _361760)
   Call: (275) [system] 0==[_375686, _375692]
^  Redo: (274) [user] mfix_vars1(0, _361760)
^  Unify: (274) [user] mfix_vars1(0, _361760)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _361760)
^  Unify: (274) [user] mfix_vars1(0, _361760)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _361760)
^  Unify: (274) [user] mfix_vars1(0, _361760)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _361760)
^  Unify: (274) [user] mfix_vars1(0, _361760)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _361760)
   Call: (275) [system] 0=_361760
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _361762, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1632, 0], [1632, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1632, 0], [";;", 1632, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1632, 0], [";;", 1632, 0])
   Call: (270) [system] compound_name_arguments(_255934, '$COMMENT', [";;", 1632, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1632, 0), '$COMMENT', [";;", 1632, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1632, 0)\=@='$COMMENT'(";;", 1632, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1632, 0), _250348)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1632, 0), _411934))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1632, 0), _411934))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1632, 0), _411934))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1632, 0), _411934))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1632, 0), _411934)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1632, 0), _411934)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1632, 0), _417520))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1632, 0), _417520))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1632, 0), _417520)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1632, 0), _417520)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1632, 0), _417520)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1632, 0)\=@='$COMMENT'(";;", 1632, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1632, 0), _411934)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1632, 0), _244736))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1632, 0), _244736))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1632, 0), _244736))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1632, 0), _244736))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1632, 0), _244736)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1632, 0), _244736)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1632, 0), _439840))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1632, 0), _439840))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1632, 0), _439840)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1632, 0), _439840)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1632, 0), _439840)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1632, 0)\=@='$COMMENT'(";;", 1632, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1632, 0), _244736)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1632, 0)\=@='$COMMENT'(";;", 1632, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1632, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1632, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1632, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1632, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1632, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1632, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1632, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1632, 0), _468618, [], _468620)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1632, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1632, 0), _468618, [], _468620)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1632, 0), _468618, [], _468620)
   Call: (258) [system] atom('$COMMENT'(";;", 1632, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1632, 0), _468618, [], _468620)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1632, 0), _468618, [], _468620)
   Call: (258) [system] compound('$COMMENT'(";;", 1632, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1632, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1632, 0), _477934, _477936)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1632, 0), '$COMMENT', [";;", 1632, 0])
^  Call: (258) [user] subst_vars([";;", 1632, 0], _479820, [], _468620)
^  Unify: (258) [user] subst_vars([";;", 1632, 0], [";;", 1632, 0], [], [])
   Call: (259) [system] var([";;", 1632, 0])
^  Redo: (258) [user] subst_vars([";;", 1632, 0], _479820, [], _468620)
^  Unify: (258) [user] subst_vars([";;", 1632, 0], [_483556|_483558], [], _468620)
^  Call: (259) [user] subst_vars(";;", _483556, [], _484496)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _483556, [], _484496)
^  Unify: (259) [user] subst_vars(";;", _483556, [], _484496)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _483556, [], _484496)
^  Unify: (259) [user] subst_vars(";;", _483556, [], _484496)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _483556, [], _484496)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1632, 0], _483558, [], _468620)
^  Unify: (259) [user] subst_vars([1632, 0], [1632, 0], [], [])
   Call: (260) [system] var([1632, 0])
^  Redo: (259) [user] subst_vars([1632, 0], _483558, [], _468620)
^  Unify: (259) [user] subst_vars([1632, 0], [_499428|_499430], [], _468620)
^  Call: (260) [user] subst_vars(1632, _499428, [], _500368)
^  Unify: (260) [user] subst_vars(1632, 1632, [], [])
   Call: (261) [system] var(1632)
^  Redo: (260) [user] subst_vars(1632, _499428, [], _500368)
^  Unify: (260) [user] subst_vars(1632, _499428, [], _500368)
   Call: (261) [system] atom(1632)
^  Redo: (260) [user] subst_vars(1632, _499428, [], _500368)
^  Unify: (260) [user] subst_vars(1632, _499428, [], _500368)
   Call: (261) [system] compound(1632)
^  Redo: (260) [user] subst_vars(1632, _499428, [], _500368)
^  Unify: (260) [user] subst_vars(1632, 1632, [], [])
^  Exit: (260) [user] subst_vars(1632, 1632, [], [])
^  Call: (260) [user] subst_vars([0], _499430, [], _468620)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _499430, [], _468620)
^  Unify: (260) [user] subst_vars([0], [_515300|_515302], [], _468620)
^  Call: (261) [user] subst_vars(0, _515300, [], _516240)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _515300, [], _516240)
^  Unify: (261) [user] subst_vars(0, _515300, [], _516240)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _515300, [], _516240)
^  Unify: (261) [user] subst_vars(0, _515300, [], _516240)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _5982, [], _5986)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _5984, [], _5938)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _5984, [], _5938)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1632, 0], [1632, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1632, 0], [";;", 1632, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5936, '$COMMENT', [";;", 1632, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1632, 0), '$COMMENT', [";;", 1632, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1632, 0), '$COMMENT'(";;", 1632, 0), [], [])
   Call: (257) [system] _20722=metta_file_buffer(+, '$COMMENT'(";;", 1632, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1632, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1632, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1632, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1632, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1632, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1632, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1632, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1632, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1633, 0, 58465, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$stream_position'(58465, 1633, 0, 58499)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _73452))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _73452))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _73452)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _73452)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _73452)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _73452)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _79064))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _79064))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _79064))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _79064))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _79064)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _79064)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _84650))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _84650))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _84650)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _84650)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _84650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _84650)
   Call: (270) [system] var('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _84650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$VAR'(_92110))
   Call: (270) [system] atom('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _84650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _84650)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _84650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _84650)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _84650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _84650)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0)==[_101390, _101396]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _84650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _84650)
   Call: (270) [system] is_list('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _84650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _84650)
   Call: (270) [system] string('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _84650)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _84650)
   Call: (270) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _111592, _111594)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0], _115334)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0], _115334)
   Call: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0], _115334, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0], [_118152|_118154], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _118152)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _118152)
   Call: (273) [system] var(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _118152)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", '$VAR'(_122798))
   Call: (273) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _118152)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _118152)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["==true
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _118152)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _118152)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["==false
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _118152)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _118152)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["==[_132078, _132084]
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _118152)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _118152)
   Call: (273) [system] is_list(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _118152)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _118152)
   Call: (273) [system] string(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Exit: (273) [system] string(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _118152)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _118152)
   Call: (273) [system] compound(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _118152)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _118152)
^  Call: (273) [user] symbol(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Unify: (273) [user] symbol(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Call: (274) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Fail: (274) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Fail: (273) [user] symbol(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _118152)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["=_118152
   Exit: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["=";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["
^  Exit: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Call: (272) [apply] apply:maplist_([1633, 0], _118154, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1633, 0], [_156150|_156152], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1633, _156150)
^  Unify: (273) [user] mfix_vars1(1633, _156150)
   Call: (274) [system] var(1633)
^  Redo: (273) [user] mfix_vars1(1633, _156150)
^  Unify: (273) [user] mfix_vars1(1633, '$VAR'(_160796))
   Call: (274) [system] atom(1633)
^  Redo: (273) [user] mfix_vars1(1633, _156150)
^  Unify: (273) [user] mfix_vars1(1633, _156150)
   Call: (274) [system] 1633==true
^  Redo: (273) [user] mfix_vars1(1633, _156150)
^  Unify: (273) [user] mfix_vars1(1633, _156150)
   Call: (274) [system] 1633==false
^  Redo: (273) [user] mfix_vars1(1633, _156150)
^  Unify: (273) [user] mfix_vars1(1633, _156150)
   Call: (274) [system] 1633==[_170076, _170082]
^  Redo: (273) [user] mfix_vars1(1633, _156150)
^  Unify: (273) [user] mfix_vars1(1633, _156150)
   Call: (274) [system] is_list(1633)
^  Redo: (273) [user] mfix_vars1(1633, _156150)
^  Unify: (273) [user] mfix_vars1(1633, _156150)
   Call: (274) [system] string(1633)
^  Redo: (273) [user] mfix_vars1(1633, _156150)
^  Unify: (273) [user] mfix_vars1(1633, _156150)
   Call: (274) [system] compound(1633)
^  Redo: (273) [user] mfix_vars1(1633, _156150)
^  Unify: (273) [user] mfix_vars1(1633, _156150)
^  Call: (274) [user] symbol(1633)
^  Unify: (274) [user] symbol(1633)
   Call: (275) [system] atom(1633)
   Fail: (275) [system] atom(1633)
^  Fail: (274) [user] symbol(1633)
^  Redo: (273) [user] mfix_vars1(1633, _156150)
   Call: (274) [system] 1633=_156150
   Exit: (274) [system] 1633=1633
^  Exit: (273) [user] mfix_vars1(1633, 1633)
   Call: (273) [apply] apply:maplist_([0], _156152, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_190476|_190478], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _190476)
^  Unify: (274) [user] mfix_vars1(0, _190476)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _190476)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_195122))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _190476)
^  Unify: (274) [user] mfix_vars1(0, _190476)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _190476)
^  Unify: (274) [user] mfix_vars1(0, _190476)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _190476)
^  Unify: (274) [user] mfix_vars1(0, _190476)
   Call: (275) [system] 0==[_204402, _204408]
^  Redo: (274) [user] mfix_vars1(0, _190476)
^  Unify: (274) [user] mfix_vars1(0, _190476)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _190476)
^  Unify: (274) [user] mfix_vars1(0, _190476)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _190476)
^  Unify: (274) [user] mfix_vars1(0, _190476)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _190476)
^  Unify: (274) [user] mfix_vars1(0, _190476)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _190476)
   Call: (275) [system] 0=_190476
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _190478, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1633, 0], [1633, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0])
   Call: (270) [system] compound_name_arguments(_84650, '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _79064)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _240650))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _240650))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _240650))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _240650))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _240650)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _240650)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _246236))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _246236))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _246236)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _246236)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _246236)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _240650)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _73452))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _73452))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _73452))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _73452))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _73452)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _73452)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _268556))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _268556))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _268556)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _268556)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _268556)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _73452)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0)))
   Call: (261) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _297334, [], _297336)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _297334, [], _297336)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _297334, [], _297336)
   Call: (258) [system] atom('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _297334, [], _297336)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _297334, [], _297336)
   Call: (258) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), _306650, _306652)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0])
^  Call: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0], _308536, [], _297336)
^  Unify: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0], [], [])
   Call: (259) [system] var([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0])
^  Redo: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0], _308536, [], _297336)
^  Unify: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0], [_312272|_312274], [], _297336)
^  Call: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _312272, [], _313212)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", [], [])
   Call: (260) [system] var(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _312272, [], _313212)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _312272, [], _313212)
   Call: (260) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _312272, [], _313212)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _312272, [], _313212)
   Call: (260) [system] compound(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _312272, [], _313212)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", [], [])
^  Exit: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", [], [])
^  Call: (259) [user] subst_vars([1633, 0], _312274, [], _297336)
^  Unify: (259) [user] subst_vars([1633, 0], [1633, 0], [], [])
   Call: (260) [system] var([1633, 0])
^  Redo: (259) [user] subst_vars([1633, 0], _312274, [], _297336)
^  Unify: (259) [user] subst_vars([1633, 0], [_328144|_328146], [], _297336)
^  Call: (260) [user] subst_vars(1633, _328144, [], _329084)
^  Unify: (260) [user] subst_vars(1633, 1633, [], [])
   Call: (261) [system] var(1633)
^  Redo: (260) [user] subst_vars(1633, _328144, [], _329084)
^  Unify: (260) [user] subst_vars(1633, _328144, [], _329084)
   Call: (261) [system] atom(1633)
^  Redo: (260) [user] subst_vars(1633, _328144, [], _329084)
^  Unify: (260) [user] subst_vars(1633, _328144, [], _329084)
   Call: (261) [system] compound(1633)
^  Redo: (260) [user] subst_vars(1633, _328144, [], _329084)
^  Unify: (260) [user] subst_vars(1633, 1633, [], [])
^  Exit: (260) [user] subst_vars(1633, 1633, [], [])
^  Call: (260) [user] subst_vars([0], _328146, [], _297336)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _328146, [], _297336)
^  Unify: (260) [user] subst_vars([0], [_344016|_344018], [], _297336)
^  Call: (261) [user] subst_vars(0, _344016, [], _344956)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _344016, [], _344956)
^  Unify: (261) [user] subst_vars(0, _344016, [], _344956)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _344016, [], _344956)
^  Unify: (261) [user] subst_vars(0, _344016, [], _344956)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _344016, [], _344956)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _344018, [], _297336)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _344018, [], _297336)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1633, 0], [1633, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0], [], [])
   Call: (258) [system] compound_name_arguments(_297334, '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), [], [])
   Call: (257) [system] _367374=metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1633, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1634, 0, 58525, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$stream_position'(58525, 1634, 0, 58559)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _420098))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _420098))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _420098)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _420098)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _420098)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _420098)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _425710))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _425710))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _425710))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _425710))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _425710)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _425710)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _431296))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _431296))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _431296)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _431296)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _431296)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _431296)
   Call: (270) [system] var('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _431296)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$VAR'(_438756))
   Call: (270) [system] atom('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _431296)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _431296)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _431296)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _431296)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _431296)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _431296)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0)==[_448036, _448042]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _431296)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _431296)
   Call: (270) [system] is_list('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _431296)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _431296)
   Call: (270) [system] string('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _431296)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _431296)
   Call: (270) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _458238, _458240)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1634, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         vec![expr!(\"@doc-formal\"", 1634, 0], _461980)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         vec![expr!(\"@doc-formal\"", 1634, 0], _461980)
   Call: (271) [apply] apply:maplist_([";;         vec![expr!(\"@doc-formal\"", 1634, 0], _461980, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         vec![expr!(\"@doc-formal\"", 1634, 0], [_464798|_464800], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _464798)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _464798)
   Call: (273) [system] var(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _464798)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", '$VAR'(_469444))
   Call: (273) [system] atom(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _464798)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _464798)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""==true
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _464798)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _464798)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""==false
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _464798)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _464798)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""==[_478724, _478730]
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _464798)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _464798)
   Call: (273) [system] is_list(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _464798)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _464798)
   Call: (273) [system] string(";;         vec![expr!(\"@doc-formal\"")
   Exit: (273) [system] string(";;         vec![expr!(\"@doc-formal\"")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _464798)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _464798)
   Call: (273) [system] compound(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _464798)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _464798)
^  Call: (273) [user] symbol(";;         vec![expr!(\"@doc-formal\"")
^  Unify: (273) [user] symbol(";;         vec![expr!(\"@doc-formal\"")
   Call: (274) [system] atom(";;         vec![expr!(\"@doc-formal\"")
   Fail: (274) [system] atom(";;         vec![expr!(\"@doc-formal\"")
^  Fail: (273) [user] symbol(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _464798)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""=_464798
   Exit: (273) [system] ";;         vec![expr!(\"@doc-formal\""=";;         vec![expr!(\"@doc-formal\""
^  Exit: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"")
   Call: (272) [apply] apply:maplist_([1634, 0], _464800, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1634, 0], [_502796|_502798], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1634, _502796)
^  Unify: (273) [user] mfix_vars1(1634, _502796)
   Call: (274) [system] var(1634)
^  Redo: (273) [user] mfix_vars1(1634, _502796)
^  Unify: (273) [user] mfix_vars1(1634, '$VAR'(_507442))
   Call: (274) [system] atom(1634)
^  Redo: (273) [user] mfix_vars1(1634, _502796)
^  Unify: (273) [user] mfix_vars1(1634, _502796)
   Call: (274) [system] 1634==true
^  Redo: (273) [user] mfix_vars1(1634, _502796)
^  Unify: (273) [user] mfix_vars1(1634, _502796)
   Call: (274) [system] 1634==false
^  Redo: (273) [user] mfix_vars1(1634, _502796)
^  Unify: (273) [user] mfix_vars1(1634, _502796)
   Call: (274) [system] 1634==[_516722, _516728]
^  Redo: (273) [user] mfix_vars1(1634, _502796)
^  Unify: (273) [user] mfix_vars1(1634, _502796)
   Call: (274) [system] is_list(1634)
^  Redo: (273) [user] mfix_vars1(1634, _502796)
^  Unify: (273) [user] mfix_vars1(1634, _502796)
   Call: (274) [system] string(1634)
^  Redo: (273) [user] mfix_vars1(1634, _502796)
^  Unify: (273) [user] mfix_vars1(1634, _6036)
   Call: (274) [system] compound(1634)
^  Redo: (273) [user] mfix_vars1(1634, _6036)
^  Unify: (273) [user] mfix_vars1(1634, _6036)
^  Call: (274) [user] symbol(1634)
^  Unify: (274) [user] symbol(1634)
   Call: (275) [system] atom(1634)
   Fail: (275) [system] atom(1634)
^  Fail: (274) [user] symbol(1634)
^  Redo: (273) [user] mfix_vars1(1634, _6036)
   Call: (274) [system] 1634=_6036
   Exit: (274) [system] 1634=1634
^  Exit: (273) [user] mfix_vars1(1634, 1634)
   Call: (273) [apply] apply:maplist_([0], _6038, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_18986|_18988], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _18986)
^  Unify: (274) [user] mfix_vars1(0, _18986)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _18986)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_23632))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _18986)
^  Unify: (274) [user] mfix_vars1(0, _18986)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _18986)
^  Unify: (274) [user] mfix_vars1(0, _18986)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _18986)
^  Unify: (274) [user] mfix_vars1(0, _18986)
   Call: (275) [system] 0==[_32912, _32918]
^  Redo: (274) [user] mfix_vars1(0, _18986)
^  Unify: (274) [user] mfix_vars1(0, _18986)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _18986)
^  Unify: (274) [user] mfix_vars1(0, _18986)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _18986)
^  Unify: (274) [user] mfix_vars1(0, _18986)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _18986)
^  Unify: (274) [user] mfix_vars1(0, _18986)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _18986)
   Call: (275) [system] 0=_18986
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _18988, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1634, 0], [1634, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         vec![expr!(\"@doc-formal\"", 1634, 0], [";;         vec![expr!(\"@doc-formal\"", 1634, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         vec![expr!(\"@doc-formal\"", 1634, 0], [";;         vec![expr!(\"@doc-formal\"", 1634, 0])
   Call: (270) [system] compound_name_arguments(_5984, '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1634, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1634, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _5970)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _69160))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _69160))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _69160))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _69160))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _69160)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _69160)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _74746))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _74746))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _74746)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _74746)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _74746)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _69160)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _97066))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _97066))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _97066)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _97066)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _97066)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0)))
   Call: (261) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _125844, [], _125846)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _125844, [], _125846)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _125844, [], _125846)
   Call: (258) [system] atom('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _125844, [], _125846)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _125844, [], _125846)
   Call: (258) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), _135160, _135162)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1634, 0])
^  Call: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1634, 0], _137046, [], _125846)
^  Unify: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1634, 0], [";;         vec![expr!(\"@doc-formal\"", 1634, 0], [], [])
   Call: (259) [system] var([";;         vec![expr!(\"@doc-formal\"", 1634, 0])
^  Redo: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1634, 0], _137046, [], _125846)
^  Unify: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1634, 0], [_140782|_140784], [], _125846)
^  Call: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _140782, [], _141722)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"", [], [])
   Call: (260) [system] var(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _140782, [], _141722)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _140782, [], _141722)
   Call: (260) [system] atom(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _140782, [], _141722)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _140782, [], _141722)
   Call: (260) [system] compound(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _140782, [], _141722)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"", [], [])
^  Exit: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"", [], [])
^  Call: (259) [user] subst_vars([1634, 0], _140784, [], _125846)
^  Unify: (259) [user] subst_vars([1634, 0], [1634, 0], [], [])
   Call: (260) [system] var([1634, 0])
^  Redo: (259) [user] subst_vars([1634, 0], _140784, [], _125846)
^  Unify: (259) [user] subst_vars([1634, 0], [_156654|_156656], [], _125846)
^  Call: (260) [user] subst_vars(1634, _156654, [], _157594)
^  Unify: (260) [user] subst_vars(1634, 1634, [], [])
   Call: (261) [system] var(1634)
^  Redo: (260) [user] subst_vars(1634, _156654, [], _157594)
^  Unify: (260) [user] subst_vars(1634, _156654, [], _157594)
   Call: (261) [system] atom(1634)
^  Redo: (260) [user] subst_vars(1634, _156654, [], _157594)
^  Unify: (260) [user] subst_vars(1634, _156654, [], _157594)
   Call: (261) [system] compound(1634)
^  Redo: (260) [user] subst_vars(1634, _156654, [], _157594)
^  Unify: (260) [user] subst_vars(1634, 1634, [], [])
^  Exit: (260) [user] subst_vars(1634, 1634, [], [])
^  Call: (260) [user] subst_vars([0], _156656, [], _125846)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _156656, [], _125846)
^  Unify: (260) [user] subst_vars([0], [_172526|_172528], [], _125846)
^  Call: (261) [user] subst_vars(0, _172526, [], _173466)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _172526, [], _173466)
^  Unify: (261) [user] subst_vars(0, _172526, [], _173466)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _172526, [], _173466)
^  Unify: (261) [user] subst_vars(0, _172526, [], _173466)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _172526, [], _173466)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _172528, [], _125846)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _172528, [], _125846)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1634, 0], [1634, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1634, 0], [";;         vec![expr!(\"@doc-formal\"", 1634, 0], [], [])
   Call: (258) [system] compound_name_arguments(_125844, '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1634, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1634, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), [], [])
   Call: (257) [system] _195884=metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1634, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1635, 0, 58561, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$stream_position'(58561, 1635, 0, 58595)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _248610))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _248610))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _248610)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _248610)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _248610)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _248610)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _254222))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _254222))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _254222))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _254222))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _254222)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _254222)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _259808))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _259808))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _259808)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _259808)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _259808)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _259808)
   Call: (270) [system] var('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _259808)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$VAR'(_267268))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _259808)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _259808)
   Call: (270) [system] '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _259808)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _259808)
   Call: (270) [system] '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _259808)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _259808)
   Call: (270) [system] '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0)==[_276548, _276554]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _259808)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _259808)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _259808)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _259808)
   Call: (270) [system] string('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _259808)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _259808)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _286750, _286752)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT', [";;             (\"@item\" {SomeGndAtom{}})", 1635, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@item\" {SomeGndAtom{}})", 1635, 0], _290492)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@item\" {SomeGndAtom{}})", 1635, 0], _290492)
   Call: (271) [apply] apply:maplist_([";;             (\"@item\" {SomeGndAtom{}})", 1635, 0], _290492, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@item\" {SomeGndAtom{}})", 1635, 0], [_293310|_293312], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@item\" {SomeGndAtom{}})", _293310)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" {SomeGndAtom{}})", _293310)
   Call: (273) [system] var(";;             (\"@item\" {SomeGndAtom{}})")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" {SomeGndAtom{}})", _293310)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" {SomeGndAtom{}})", '$VAR'(_297956))
   Call: (273) [system] atom(";;             (\"@item\" {SomeGndAtom{}})")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" {SomeGndAtom{}})", _293310)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" {SomeGndAtom{}})", _293310)
   Call: (273) [system] ";;             (\"@item\" {SomeGndAtom{}})"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" {SomeGndAtom{}})", _293310)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" {SomeGndAtom{}})", _293310)
   Call: (273) [system] ";;             (\"@item\" {SomeGndAtom{}})"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" {SomeGndAtom{}})", _293310)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" {SomeGndAtom{}})", _293310)
   Call: (273) [system] ";;             (\"@item\" {SomeGndAtom{}})"==[_307236, _307242]
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" {SomeGndAtom{}})", _293310)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" {SomeGndAtom{}})", _293310)
   Call: (273) [system] is_list(";;             (\"@item\" {SomeGndAtom{}})")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" {SomeGndAtom{}})", _293310)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" {SomeGndAtom{}})", _293310)
   Call: (273) [system] string(";;             (\"@item\" {SomeGndAtom{}})")
   Exit: (273) [system] string(";;             (\"@item\" {SomeGndAtom{}})")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" {SomeGndAtom{}})", _293310)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" {SomeGndAtom{}})", _293310)
   Call: (273) [system] compound(";;             (\"@item\" {SomeGndAtom{}})")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" {SomeGndAtom{}})", _293310)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" {SomeGndAtom{}})", _293310)
^  Call: (273) [user] symbol(";;             (\"@item\" {SomeGndAtom{}})")
^  Unify: (273) [user] symbol(";;             (\"@item\" {SomeGndAtom{}})")
   Call: (274) [system] atom(";;             (\"@item\" {SomeGndAtom{}})")
   Fail: (274) [system] atom(";;             (\"@item\" {SomeGndAtom{}})")
^  Fail: (273) [user] symbol(";;             (\"@item\" {SomeGndAtom{}})")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" {SomeGndAtom{}})", _293310)
   Call: (273) [system] ";;             (\"@item\" {SomeGndAtom{}})"=_293310
   Exit: (273) [system] ";;             (\"@item\" {SomeGndAtom{}})"=";;             (\"@item\" {SomeGndAtom{}})"
^  Exit: (272) [user] mfix_vars1(";;             (\"@item\" {SomeGndAtom{}})", ";;             (\"@item\" {SomeGndAtom{}})")
   Call: (272) [apply] apply:maplist_([1635, 0], _293312, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1635, 0], [_331308|_331310], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1635, _331308)
^  Unify: (273) [user] mfix_vars1(1635, _331308)
   Call: (274) [system] var(1635)
^  Redo: (273) [user] mfix_vars1(1635, _331308)
^  Unify: (273) [user] mfix_vars1(1635, '$VAR'(_335954))
   Call: (274) [system] atom(1635)
^  Redo: (273) [user] mfix_vars1(1635, _331308)
^  Unify: (273) [user] mfix_vars1(1635, _331308)
   Call: (274) [system] 1635==true
^  Redo: (273) [user] mfix_vars1(1635, _331308)
^  Unify: (273) [user] mfix_vars1(1635, _331308)
   Call: (274) [system] 1635==false
^  Redo: (273) [user] mfix_vars1(1635, _331308)
^  Unify: (273) [user] mfix_vars1(1635, _331308)
   Call: (274) [system] 1635==[_345234, _345240]
^  Redo: (273) [user] mfix_vars1(1635, _331308)
^  Unify: (273) [user] mfix_vars1(1635, _331308)
   Call: (274) [system] is_list(1635)
^  Redo: (273) [user] mfix_vars1(1635, _331308)
^  Unify: (273) [user] mfix_vars1(1635, _331308)
   Call: (274) [system] string(1635)
^  Redo: (273) [user] mfix_vars1(1635, _331308)
^  Unify: (273) [user] mfix_vars1(1635, _331308)
   Call: (274) [system] compound(1635)
^  Redo: (273) [user] mfix_vars1(1635, _331308)
^  Unify: (273) [user] mfix_vars1(1635, _331308)
^  Call: (274) [user] symbol(1635)
^  Unify: (274) [user] symbol(1635)
   Call: (275) [system] atom(1635)
   Fail: (275) [system] atom(1635)
^  Fail: (274) [user] symbol(1635)
^  Redo: (273) [user] mfix_vars1(1635, _331308)
   Call: (274) [system] 1635=_331308
   Exit: (274) [system] 1635=1635
^  Exit: (273) [user] mfix_vars1(1635, 1635)
   Call: (273) [apply] apply:maplist_([0], _331310, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_365634|_365636], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _365634)
^  Unify: (274) [user] mfix_vars1(0, _365634)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _365634)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_370280))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _365634)
^  Unify: (274) [user] mfix_vars1(0, _365634)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _365634)
^  Unify: (274) [user] mfix_vars1(0, _365634)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _365634)
^  Unify: (274) [user] mfix_vars1(0, _365634)
   Call: (275) [system] 0==[_379560, _379566]
^  Redo: (274) [user] mfix_vars1(0, _365634)
^  Unify: (274) [user] mfix_vars1(0, _365634)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _365634)
^  Unify: (274) [user] mfix_vars1(0, _365634)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _365634)
^  Unify: (274) [user] mfix_vars1(0, _365634)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _365634)
^  Unify: (274) [user] mfix_vars1(0, _365634)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _365634)
   Call: (275) [system] 0=_365634
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _365636, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1635, 0], [1635, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@item\" {SomeGndAtom{}})", 1635, 0], [";;             (\"@item\" {SomeGndAtom{}})", 1635, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@item\" {SomeGndAtom{}})", 1635, 0], [";;             (\"@item\" {SomeGndAtom{}})", 1635, 0])
   Call: (270) [system] compound_name_arguments(_259808, '$COMMENT', [";;             (\"@item\" {SomeGndAtom{}})", 1635, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT', [";;             (\"@item\" {SomeGndAtom{}})", 1635, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0)\=@='$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _254222)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _415808))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _415808))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _415808))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _415808))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _415808)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _415808)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _421394))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _421394))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _421394)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _421394)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _421394)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0)\=@='$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _415808)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _248610))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _248610))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _248610))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _248610))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _248610)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _248610)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _443714))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _443714))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _443714)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _443714)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _443714)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0)\=@='$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _248610)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0)\=@='$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _472492, [], _472494)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _472492, [], _472494)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _472492, [], _472494)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _472492, [], _472494)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _472492, [], _472494)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), _481808, _481810)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT', [";;             (\"@item\" {SomeGndAtom{}})", 1635, 0])
^  Call: (258) [user] subst_vars([";;             (\"@item\" {SomeGndAtom{}})", 1635, 0], _483694, [], _472494)
^  Unify: (258) [user] subst_vars([";;             (\"@item\" {SomeGndAtom{}})", 1635, 0], [";;             (\"@item\" {SomeGndAtom{}})", 1635, 0], [], [])
   Call: (259) [system] var([";;             (\"@item\" {SomeGndAtom{}})", 1635, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@item\" {SomeGndAtom{}})", 1635, 0], _483694, [], _472494)
^  Unify: (258) [user] subst_vars([";;             (\"@item\" {SomeGndAtom{}})", 1635, 0], [_487430|_487432], [], _472494)
^  Call: (259) [user] subst_vars(";;             (\"@item\" {SomeGndAtom{}})", _487430, [], _488370)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" {SomeGndAtom{}})", ";;             (\"@item\" {SomeGndAtom{}})", [], [])
   Call: (260) [system] var(";;             (\"@item\" {SomeGndAtom{}})")
^  Redo: (259) [user] subst_vars(";;             (\"@item\" {SomeGndAtom{}})", _487430, [], _488370)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" {SomeGndAtom{}})", _487430, [], _488370)
   Call: (260) [system] atom(";;             (\"@item\" {SomeGndAtom{}})")
^  Redo: (259) [user] subst_vars(";;             (\"@item\" {SomeGndAtom{}})", _487430, [], _488370)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" {SomeGndAtom{}})", _487430, [], _488370)
   Call: (260) [system] compound(";;             (\"@item\" {SomeGndAtom{}})")
^  Redo: (259) [user] subst_vars(";;             (\"@item\" {SomeGndAtom{}})", _487430, [], _488370)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" {SomeGndAtom{}})", ";;             (\"@item\" {SomeGndAtom{}})", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@item\" {SomeGndAtom{}})", ";;             (\"@item\" {SomeGndAtom{}})", [], [])
^  Call: (259) [user] subst_vars([1635, 0], _487432, [], _472494)
^  Unify: (259) [user] subst_vars([1635, 0], [1635, 0], [], [])
   Call: (260) [system] var([1635, 0])
^  Redo: (259) [user] subst_vars([1635, 0], _487432, [], _472494)
^  Unify: (259) [user] subst_vars([1635, 0], [_503302|_503304], [], _472494)
^  Call: (260) [user] subst_vars(1635, _503302, [], _504242)
^  Unify: (260) [user] subst_vars(1635, 1635, [], [])
   Call: (261) [system] var(1635)
^  Redo: (260) [user] subst_vars(1635, _503302, [], _504242)
^  Unify: (260) [user] subst_vars(1635, _503302, [], _504242)
   Call: (261) [system] atom(1635)
^  Redo: (260) [user] subst_vars(1635, _503302, [], _504242)
^  Unify: (260) [user] subst_vars(1635, _503302, [], _504242)
   Call: (261) [system] compound(1635)
^  Redo: (260) [user] subst_vars(1635, _503302, [], _504242)
^  Unify: (260) [user] subst_vars(1635, 1635, [], [])
^  Exit: (260) [user] subst_vars(1635, 1635, [], [])
^  Call: (260) [user] subst_vars([0], _503304, [], _472494)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _503304, [], _472494)
^  Unify: (260) [user] subst_vars([0], [_519174|_519176], [], _472494)
^  Call: (261) [user] subst_vars(0, _519174, [], _520114)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _519174, [], _520114)
^  Unify: (261) [user] subst_vars(0, _5992, [], _5996)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _5992, [], _5996)
^  Unify: (261) [user] subst_vars(0, _5992, [], _5996)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _5992, [], _5996)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _5994, [], _5948)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _5994, [], _5948)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1635, 0], [1635, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@item\" {SomeGndAtom{}})", 1635, 0], [";;             (\"@item\" {SomeGndAtom{}})", 1635, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5946, '$COMMENT', [";;             (\"@item\" {SomeGndAtom{}})", 1635, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT', [";;             (\"@item\" {SomeGndAtom{}})", 1635, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), [], [])
   Call: (257) [system] _24530=metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" {SomeGndAtom{}})", 1635, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1636, 0, 58602, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$stream_position'(58602, 1636, 0, 58636)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _77254))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _77254))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _77254)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _77254)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _77254)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _77254)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _82866))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _82866))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _82866))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _82866))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _82866)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _82866)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _88452))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _88452))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _88452)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _88452)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _88452)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _88452)
   Call: (270) [system] var('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _88452)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$VAR'(_95912))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _88452)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _88452)
   Call: (270) [system] '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _88452)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _88452)
   Call: (270) [system] '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _88452)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _88452)
   Call: (270) [system] '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0)==[_105192, _105198]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _88452)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _88452)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _88452)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _88452)
   Call: (270) [system] string('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _88452)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _88452)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _115394, _115396)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT', [";;             (\"@kind\" \"function\")", 1636, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@kind\" \"function\")", 1636, 0], _119136)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@kind\" \"function\")", 1636, 0], _119136)
   Call: (271) [apply] apply:maplist_([";;             (\"@kind\" \"function\")", 1636, 0], _119136, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@kind\" \"function\")", 1636, 0], [_121954|_121956], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _121954)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _121954)
   Call: (273) [system] var(";;             (\"@kind\" \"function\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _121954)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", '$VAR'(_126600))
   Call: (273) [system] atom(";;             (\"@kind\" \"function\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _121954)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _121954)
   Call: (273) [system] ";;             (\"@kind\" \"function\")"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _121954)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _121954)
   Call: (273) [system] ";;             (\"@kind\" \"function\")"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _121954)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _121954)
   Call: (273) [system] ";;             (\"@kind\" \"function\")"==[_135880, _135886]
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _121954)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _121954)
   Call: (273) [system] is_list(";;             (\"@kind\" \"function\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _121954)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _121954)
   Call: (273) [system] string(";;             (\"@kind\" \"function\")")
   Exit: (273) [system] string(";;             (\"@kind\" \"function\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _121954)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _121954)
   Call: (273) [system] compound(";;             (\"@kind\" \"function\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _121954)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _121954)
^  Call: (273) [user] symbol(";;             (\"@kind\" \"function\")")
^  Unify: (273) [user] symbol(";;             (\"@kind\" \"function\")")
   Call: (274) [system] atom(";;             (\"@kind\" \"function\")")
   Fail: (274) [system] atom(";;             (\"@kind\" \"function\")")
^  Fail: (273) [user] symbol(";;             (\"@kind\" \"function\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _121954)
   Call: (273) [system] ";;             (\"@kind\" \"function\")"=_121954
   Exit: (273) [system] ";;             (\"@kind\" \"function\")"=";;             (\"@kind\" \"function\")"
^  Exit: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", ";;             (\"@kind\" \"function\")")
   Call: (272) [apply] apply:maplist_([1636, 0], _121956, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1636, 0], [_159952|_159954], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1636, _159952)
^  Unify: (273) [user] mfix_vars1(1636, _159952)
   Call: (274) [system] var(1636)
^  Redo: (273) [user] mfix_vars1(1636, _159952)
^  Unify: (273) [user] mfix_vars1(1636, '$VAR'(_164598))
   Call: (274) [system] atom(1636)
^  Redo: (273) [user] mfix_vars1(1636, _159952)
^  Unify: (273) [user] mfix_vars1(1636, _159952)
   Call: (274) [system] 1636==true
^  Redo: (273) [user] mfix_vars1(1636, _159952)
^  Unify: (273) [user] mfix_vars1(1636, _159952)
   Call: (274) [system] 1636==false
^  Redo: (273) [user] mfix_vars1(1636, _159952)
^  Unify: (273) [user] mfix_vars1(1636, _159952)
   Call: (274) [system] 1636==[_173878, _173884]
^  Redo: (273) [user] mfix_vars1(1636, _159952)
^  Unify: (273) [user] mfix_vars1(1636, _159952)
   Call: (274) [system] is_list(1636)
^  Redo: (273) [user] mfix_vars1(1636, _159952)
^  Unify: (273) [user] mfix_vars1(1636, _159952)
   Call: (274) [system] string(1636)
^  Redo: (273) [user] mfix_vars1(1636, _159952)
^  Unify: (273) [user] mfix_vars1(1636, _159952)
   Call: (274) [system] compound(1636)
^  Redo: (273) [user] mfix_vars1(1636, _159952)
^  Unify: (273) [user] mfix_vars1(1636, _159952)
^  Call: (274) [user] symbol(1636)
^  Unify: (274) [user] symbol(1636)
   Call: (275) [system] atom(1636)
   Fail: (275) [system] atom(1636)
^  Fail: (274) [user] symbol(1636)
^  Redo: (273) [user] mfix_vars1(1636, _159952)
   Call: (274) [system] 1636=_159952
   Exit: (274) [system] 1636=1636
^  Exit: (273) [user] mfix_vars1(1636, 1636)
   Call: (273) [apply] apply:maplist_([0], _159954, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_194278|_194280], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _194278)
^  Unify: (274) [user] mfix_vars1(0, _194278)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _194278)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_198924))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _194278)
^  Unify: (274) [user] mfix_vars1(0, _194278)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _194278)
^  Unify: (274) [user] mfix_vars1(0, _194278)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _194278)
^  Unify: (274) [user] mfix_vars1(0, _194278)
   Call: (275) [system] 0==[_208204, _208210]
^  Redo: (274) [user] mfix_vars1(0, _194278)
^  Unify: (274) [user] mfix_vars1(0, _194278)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _194278)
^  Unify: (274) [user] mfix_vars1(0, _194278)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _194278)
^  Unify: (274) [user] mfix_vars1(0, _194278)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _194278)
^  Unify: (274) [user] mfix_vars1(0, _194278)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _194278)
   Call: (275) [system] 0=_194278
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _194280, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1636, 0], [1636, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@kind\" \"function\")", 1636, 0], [";;             (\"@kind\" \"function\")", 1636, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@kind\" \"function\")", 1636, 0], [";;             (\"@kind\" \"function\")", 1636, 0])
   Call: (270) [system] compound_name_arguments(_88452, '$COMMENT', [";;             (\"@kind\" \"function\")", 1636, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT', [";;             (\"@kind\" \"function\")", 1636, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0)\=@='$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _82866)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _244452))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _244452))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _244452))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _244452))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _244452)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _244452)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _250038))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _250038))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _250038)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _250038)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _250038)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0)\=@='$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _244452)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _77254))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _77254))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _77254))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _77254))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _77254)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _77254)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _272358))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _272358))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _272358)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _272358)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _272358)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0)\=@='$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _77254)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0)\=@='$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _301136, [], _301138)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _301136, [], _301138)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _301136, [], _301138)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _301136, [], _301138)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _301136, [], _301138)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), _310452, _310454)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT', [";;             (\"@kind\" \"function\")", 1636, 0])
^  Call: (258) [user] subst_vars([";;             (\"@kind\" \"function\")", 1636, 0], _312338, [], _301138)
^  Unify: (258) [user] subst_vars([";;             (\"@kind\" \"function\")", 1636, 0], [";;             (\"@kind\" \"function\")", 1636, 0], [], [])
   Call: (259) [system] var([";;             (\"@kind\" \"function\")", 1636, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@kind\" \"function\")", 1636, 0], _312338, [], _301138)
^  Unify: (258) [user] subst_vars([";;             (\"@kind\" \"function\")", 1636, 0], [_316074|_316076], [], _301138)
^  Call: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", _316074, [], _317014)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", ";;             (\"@kind\" \"function\")", [], [])
   Call: (260) [system] var(";;             (\"@kind\" \"function\")")
^  Redo: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", _316074, [], _317014)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", _316074, [], _317014)
   Call: (260) [system] atom(";;             (\"@kind\" \"function\")")
^  Redo: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", _316074, [], _317014)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", _316074, [], _317014)
   Call: (260) [system] compound(";;             (\"@kind\" \"function\")")
^  Redo: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", _316074, [], _317014)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", ";;             (\"@kind\" \"function\")", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", ";;             (\"@kind\" \"function\")", [], [])
^  Call: (259) [user] subst_vars([1636, 0], _316076, [], _301138)
^  Unify: (259) [user] subst_vars([1636, 0], [1636, 0], [], [])
   Call: (260) [system] var([1636, 0])
^  Redo: (259) [user] subst_vars([1636, 0], _316076, [], _301138)
^  Unify: (259) [user] subst_vars([1636, 0], [_331946|_331948], [], _301138)
^  Call: (260) [user] subst_vars(1636, _331946, [], _332886)
^  Unify: (260) [user] subst_vars(1636, 1636, [], [])
   Call: (261) [system] var(1636)
^  Redo: (260) [user] subst_vars(1636, _331946, [], _332886)
^  Unify: (260) [user] subst_vars(1636, _331946, [], _332886)
   Call: (261) [system] atom(1636)
^  Redo: (260) [user] subst_vars(1636, _331946, [], _332886)
^  Unify: (260) [user] subst_vars(1636, _331946, [], _332886)
   Call: (261) [system] compound(1636)
^  Redo: (260) [user] subst_vars(1636, _331946, [], _332886)
^  Unify: (260) [user] subst_vars(1636, 1636, [], [])
^  Exit: (260) [user] subst_vars(1636, 1636, [], [])
^  Call: (260) [user] subst_vars([0], _331948, [], _301138)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _331948, [], _301138)
^  Unify: (260) [user] subst_vars([0], [_347818|_347820], [], _301138)
^  Call: (261) [user] subst_vars(0, _347818, [], _348758)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _347818, [], _348758)
^  Unify: (261) [user] subst_vars(0, _347818, [], _348758)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _347818, [], _348758)
^  Unify: (261) [user] subst_vars(0, _347818, [], _348758)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _347818, [], _348758)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _347820, [], _301138)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _347820, [], _301138)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1636, 0], [1636, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@kind\" \"function\")", 1636, 0], [";;             (\"@kind\" \"function\")", 1636, 0], [], [])
   Call: (258) [system] compound_name_arguments(_301136, '$COMMENT', [";;             (\"@kind\" \"function\")", 1636, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT', [";;             (\"@kind\" \"function\")", 1636, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), [], [])
   Call: (257) [system] _371176=metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1636, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1637, 0, 58638, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$stream_position'(58638, 1637, 0, 58672)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _423908))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _423908))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _423908)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _423908)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _423908)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _423908)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _429520))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _429520))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _429520))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _429520))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _429520)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _429520)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _435106))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _435106))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _435106)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _435106)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _435106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _435106)
   Call: (270) [system] var('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _435106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$VAR'(_442566))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _435106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _435106)
   Call: (270) [system] '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _435106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _435106)
   Call: (270) [system] '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _435106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _435106)
   Call: (270) [system] '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0)==[_451846, _451852]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _435106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _435106)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _435106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _435106)
   Call: (270) [system] string('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _435106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _435106)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _462048, _462050)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT', [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0], _465790)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0], _465790)
   Call: (271) [apply] apply:maplist_([";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0], _465790, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0], [_468608|_468610], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _468608)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _468608)
   Call: (273) [system] var(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _468608)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", '$VAR'(_473254))
   Call: (273) [system] atom(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _468608)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _468608)
   Call: (273) [system] ";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _468608)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _468608)
   Call: (273) [system] ";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _468608)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _468608)
   Call: (273) [system] ";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))"==[_482534, _482540]
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _468608)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _468608)
   Call: (273) [system] is_list(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _468608)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _468608)
   Call: (273) [system] string(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
   Exit: (273) [system] string(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _468608)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _468608)
   Call: (273) [system] compound(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _468608)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _468608)
^  Call: (273) [user] symbol(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
^  Unify: (273) [user] symbol(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
   Call: (274) [system] atom(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
   Fail: (274) [system] atom(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
^  Fail: (273) [user] symbol(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _468608)
   Call: (273) [system] ";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))"=_468608
   Exit: (273) [system] ";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))"=";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))"
^  Exit: (272) [user] mfix_vars1(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", ";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
   Call: (272) [apply] apply:maplist_([1637, 0], _468610, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1637, 0], [_506606|_506608], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1637, _506606)
^  Unify: (273) [user] mfix_vars1(1637, _506606)
   Call: (274) [system] var(1637)
^  Redo: (273) [user] mfix_vars1(1637, _506606)
^  Unify: (273) [user] mfix_vars1(1637, '$VAR'(_511252))
   Call: (274) [system] atom(1637)
^  Redo: (273) [user] mfix_vars1(1637, _506606)
^  Unify: (273) [user] mfix_vars1(1637, _506606)
   Call: (274) [system] 1637==true
^  Redo: (273) [user] mfix_vars1(1637, _506606)
^  Unify: (273) [user] mfix_vars1(1637, _506606)
   Call: (274) [system] 1637==false
^  Redo: (273) [user] mfix_vars1(1637, _506606)
^  Unify: (273) [user] mfix_vars1(1637, _506606)
   Call: (274) [system] 1637==[_520532, _520538]
^  Redo: (273) [user] mfix_vars1(1637, _506606)
^  Unify: (273) [user] mfix_vars1(1637, _506606)
   Call: (274) [system] is_list(1637)
^  Redo: (273) [user] mfix_vars1(1637, _6044)
^  Unify: (273) [user] mfix_vars1(1637, _6044)
   Call: (274) [system] string(1637)
^  Redo: (273) [user] mfix_vars1(1637, _6044)
^  Unify: (273) [user] mfix_vars1(1637, _6044)
   Call: (274) [system] compound(1637)
^  Redo: (273) [user] mfix_vars1(1637, _6044)
^  Unify: (273) [user] mfix_vars1(1637, _6044)
^  Call: (274) [user] symbol(1637)
^  Unify: (274) [user] symbol(1637)
   Call: (275) [system] atom(1637)
   Fail: (275) [system] atom(1637)
^  Fail: (274) [user] symbol(1637)
^  Redo: (273) [user] mfix_vars1(1637, _6044)
   Call: (274) [system] 1637=_6044
   Exit: (274) [system] 1637=1637
^  Exit: (273) [user] mfix_vars1(1637, 1637)
   Call: (273) [apply] apply:maplist_([0], _6046, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_23080|_23082], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _23080)
^  Unify: (274) [user] mfix_vars1(0, _23080)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _23080)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_27726))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _23080)
^  Unify: (274) [user] mfix_vars1(0, _23080)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _23080)
^  Unify: (274) [user] mfix_vars1(0, _23080)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _23080)
^  Unify: (274) [user] mfix_vars1(0, _23080)
   Call: (275) [system] 0==[_37006, _37012]
^  Redo: (274) [user] mfix_vars1(0, _23080)
^  Unify: (274) [user] mfix_vars1(0, _23080)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _23080)
^  Unify: (274) [user] mfix_vars1(0, _23080)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _23080)
^  Unify: (274) [user] mfix_vars1(0, _23080)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _23080)
^  Unify: (274) [user] mfix_vars1(0, _23080)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _23080)
   Call: (275) [system] 0=_23080
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _23082, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1637, 0], [1637, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0], [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0], [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0])
   Call: (270) [system] compound_name_arguments(_5992, '$COMMENT', [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT', [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0)\=@='$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _5978)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _73254))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _73254))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _73254))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _73254))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _73254)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _73254)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _78840))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _78840))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _78840)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _78840)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _78840)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0)\=@='$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _73254)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _5958))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _5958))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _5958))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _5958))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _5958)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _5958)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _101160))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _101160))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _101160)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _101160)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _101160)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0)\=@='$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _5958)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0)\=@='$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _129938, [], _129940)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _129938, [], _129940)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _129938, [], _129940)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _129938, [], _129940)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _129938, [], _129940)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), _139254, _139256)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT', [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0])
^  Call: (258) [user] subst_vars([";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0], _141140, [], _129940)
^  Unify: (258) [user] subst_vars([";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0], [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0], [], [])
   Call: (259) [system] var([";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0], _141140, [], _129940)
^  Unify: (258) [user] subst_vars([";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0], [_144876|_144878], [], _129940)
^  Call: (259) [user] subst_vars(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _144876, [], _145816)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", ";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", [], [])
   Call: (260) [system] var(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
^  Redo: (259) [user] subst_vars(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _144876, [], _145816)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _144876, [], _145816)
   Call: (260) [system] atom(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
^  Redo: (259) [user] subst_vars(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _144876, [], _145816)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _144876, [], _145816)
   Call: (260) [system] compound(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))")
^  Redo: (259) [user] subst_vars(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", _144876, [], _145816)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", ";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", ";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", [], [])
^  Call: (259) [user] subst_vars([1637, 0], _144878, [], _129940)
^  Unify: (259) [user] subst_vars([1637, 0], [1637, 0], [], [])
   Call: (260) [system] var([1637, 0])
^  Redo: (259) [user] subst_vars([1637, 0], _144878, [], _129940)
^  Unify: (259) [user] subst_vars([1637, 0], [_160748|_160750], [], _129940)
^  Call: (260) [user] subst_vars(1637, _160748, [], _161688)
^  Unify: (260) [user] subst_vars(1637, 1637, [], [])
   Call: (261) [system] var(1637)
^  Redo: (260) [user] subst_vars(1637, _160748, [], _161688)
^  Unify: (260) [user] subst_vars(1637, _160748, [], _161688)
   Call: (261) [system] atom(1637)
^  Redo: (260) [user] subst_vars(1637, _160748, [], _161688)
^  Unify: (260) [user] subst_vars(1637, _160748, [], _161688)
   Call: (261) [system] compound(1637)
^  Redo: (260) [user] subst_vars(1637, _160748, [], _161688)
^  Unify: (260) [user] subst_vars(1637, 1637, [], [])
^  Exit: (260) [user] subst_vars(1637, 1637, [], [])
^  Call: (260) [user] subst_vars([0], _160750, [], _129940)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _160750, [], _129940)
^  Unify: (260) [user] subst_vars([0], [_176620|_176622], [], _129940)
^  Call: (261) [user] subst_vars(0, _176620, [], _177560)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _176620, [], _177560)
^  Unify: (261) [user] subst_vars(0, _176620, [], _177560)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _176620, [], _177560)
^  Unify: (261) [user] subst_vars(0, _176620, [], _177560)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _176620, [], _177560)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _176622, [], _129940)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _176622, [], _129940)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1637, 0], [1637, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0], [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0], [], [])
   Call: (258) [system] compound_name_arguments(_129938, '$COMMENT', [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT', [";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), [], [])
   Call: (257) [system] _199978=metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" (\"->\" \"Arg1Type\" \"Arg2Type\" \"ReturnType\"))", 1637, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1638, 0, 58705, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$stream_position'(58705, 1638, 0, 58739)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _252708))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _252708))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _252708)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _252708)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _252708)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _252708)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _258320))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _258320))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _258320))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _258320))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _258320)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _258320)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _263906))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _263906))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _263906)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _263906)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _263906)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _263906)
   Call: (270) [system] var('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _263906)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$VAR'(_271366))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _263906)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _263906)
   Call: (270) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _263906)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _263906)
   Call: (270) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _263906)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _263906)
   Call: (270) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0)==[_280646, _280652]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _263906)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _263906)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _263906)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _263906)
   Call: (270) [system] string('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _263906)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _263906)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _290848, _290850)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0], _294590)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0], _294590)
   Call: (271) [apply] apply:maplist_([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0], _294590, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0], [_297408|_297410], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _297408)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _297408)
   Call: (273) [system] var(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _297408)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", '$VAR'(_302054))
   Call: (273) [system] atom(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _297408)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _297408)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"Test function\")})"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _297408)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _297408)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"Test function\")})"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _297408)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _297408)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"Test function\")})"==[_311334, _311340]
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _297408)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _297408)
   Call: (273) [system] is_list(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _297408)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _297408)
   Call: (273) [system] string(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
   Exit: (273) [system] string(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _297408)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _297408)
   Call: (273) [system] compound(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _297408)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _297408)
^  Call: (273) [user] symbol(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Unify: (273) [user] symbol(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
   Call: (274) [system] atom(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
   Fail: (274) [system] atom(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Fail: (273) [user] symbol(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _297408)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"Test function\")})"=_297408
   Exit: (273) [system] ";;             (\"@desc\" {Str::from_str(\"Test function\")})"=";;             (\"@desc\" {Str::from_str(\"Test function\")})"
^  Exit: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", ";;             (\"@desc\" {Str::from_str(\"Test function\")})")
   Call: (272) [apply] apply:maplist_([1638, 0], _297410, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1638, 0], [_335406|_335408], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1638, _335406)
^  Unify: (273) [user] mfix_vars1(1638, _335406)
   Call: (274) [system] var(1638)
^  Redo: (273) [user] mfix_vars1(1638, _335406)
^  Unify: (273) [user] mfix_vars1(1638, '$VAR'(_340052))
   Call: (274) [system] atom(1638)
^  Redo: (273) [user] mfix_vars1(1638, _335406)
^  Unify: (273) [user] mfix_vars1(1638, _335406)
   Call: (274) [system] 1638==true
^  Redo: (273) [user] mfix_vars1(1638, _335406)
^  Unify: (273) [user] mfix_vars1(1638, _335406)
   Call: (274) [system] 1638==false
^  Redo: (273) [user] mfix_vars1(1638, _335406)
^  Unify: (273) [user] mfix_vars1(1638, _335406)
   Call: (274) [system] 1638==[_349332, _349338]
^  Redo: (273) [user] mfix_vars1(1638, _335406)
^  Unify: (273) [user] mfix_vars1(1638, _335406)
   Call: (274) [system] is_list(1638)
^  Redo: (273) [user] mfix_vars1(1638, _335406)
^  Unify: (273) [user] mfix_vars1(1638, _335406)
   Call: (274) [system] string(1638)
^  Redo: (273) [user] mfix_vars1(1638, _335406)
^  Unify: (273) [user] mfix_vars1(1638, _335406)
   Call: (274) [system] compound(1638)
^  Redo: (273) [user] mfix_vars1(1638, _335406)
^  Unify: (273) [user] mfix_vars1(1638, _335406)
^  Call: (274) [user] symbol(1638)
^  Unify: (274) [user] symbol(1638)
   Call: (275) [system] atom(1638)
   Fail: (275) [system] atom(1638)
^  Fail: (274) [user] symbol(1638)
^  Redo: (273) [user] mfix_vars1(1638, _335406)
   Call: (274) [system] 1638=_335406
   Exit: (274) [system] 1638=1638
^  Exit: (273) [user] mfix_vars1(1638, 1638)
   Call: (273) [apply] apply:maplist_([0], _335408, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_369732|_369734], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _369732)
^  Unify: (274) [user] mfix_vars1(0, _369732)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _369732)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_374378))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _369732)
^  Unify: (274) [user] mfix_vars1(0, _369732)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _369732)
^  Unify: (274) [user] mfix_vars1(0, _369732)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _369732)
^  Unify: (274) [user] mfix_vars1(0, _369732)
   Call: (275) [system] 0==[_383658, _383664]
^  Redo: (274) [user] mfix_vars1(0, _369732)
^  Unify: (274) [user] mfix_vars1(0, _369732)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _369732)
^  Unify: (274) [user] mfix_vars1(0, _369732)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _369732)
^  Unify: (274) [user] mfix_vars1(0, _369732)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _369732)
^  Unify: (274) [user] mfix_vars1(0, _369732)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _369732)
   Call: (275) [system] 0=_369732
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _369734, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1638, 0], [1638, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0], [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0], [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0])
   Call: (270) [system] compound_name_arguments(_263906, '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _258320)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _419906))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _419906))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _419906))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _419906))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _419906)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _419906)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _425492))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _425492))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _425492)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _425492)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _425492)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _419906)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _252708))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _252708))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _252708))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _252708))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _252708)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _252708)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _447812))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _447812))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _447812)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _447812)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _447812)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _252708)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _476590, [], _476592)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _476590, [], _476592)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _476590, [], _476592)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _476590, [], _476592)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _476590, [], _476592)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), _485906, _485908)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0])
^  Call: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0], _487792, [], _476592)
^  Unify: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0], [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0], [], [])
   Call: (259) [system] var([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0], _487792, [], _476592)
^  Unify: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0], [_491528|_491530], [], _476592)
^  Call: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _491528, [], _492468)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", ";;             (\"@desc\" {Str::from_str(\"Test function\")})", [], [])
   Call: (260) [system] var(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _491528, [], _492468)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _491528, [], _492468)
   Call: (260) [system] atom(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _491528, [], _492468)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _491528, [], _492468)
   Call: (260) [system] compound(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _491528, [], _492468)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", ";;             (\"@desc\" {Str::from_str(\"Test function\")})", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", ";;             (\"@desc\" {Str::from_str(\"Test function\")})", [], [])
^  Call: (259) [user] subst_vars([1638, 0], _491530, [], _476592)
^  Unify: (259) [user] subst_vars([1638, 0], [1638, 0], [], [])
   Call: (260) [system] var([1638, 0])
^  Redo: (259) [user] subst_vars([1638, 0], _491530, [], _476592)
^  Unify: (259) [user] subst_vars([1638, 0], [_507400|_507402], [], _476592)
^  Call: (260) [user] subst_vars(1638, _507400, [], _508340)
^  Unify: (260) [user] subst_vars(1638, 1638, [], [])
   Call: (261) [system] var(1638)
^  Redo: (260) [user] subst_vars(1638, _507400, [], _508340)
^  Unify: (260) [user] subst_vars(1638, _507400, [], _508340)
   Call: (261) [system] atom(1638)
^  Redo: (260) [user] subst_vars(1638, _507400, [], _508340)
^  Unify: (260) [user] subst_vars(1638, _507400, [], _508340)
   Call: (261) [system] compound(1638)
^  Redo: (260) [user] subst_vars(1638, _507400, [], _508340)
^  Unify: (260) [user] subst_vars(1638, 1638, [], [])
^  Exit: (260) [user] subst_vars(1638, 1638, [], [])
^  Call: (260) [user] subst_vars([0], _507402, [], _476592)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _507402, [], _476592)
^  Unify: (260) [user] subst_vars([0], [_523272|_523274], [], _476592)
^  Call: (261) [user] subst_vars(0, _5996, [], _6002)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _5996, [], _6002)
^  Unify: (261) [user] subst_vars(0, _5996, [], _6002)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _5996, [], _6002)
^  Unify: (261) [user] subst_vars(0, _5996, [], _6002)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _5996, [], _6002)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _5998, [], _5952)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _5998, [], _5952)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1638, 0], [1638, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0], [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5950, '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), [], [])
   Call: (257) [system] _28420=metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1638, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1639, 0, 58763, '$COMMENT'(";;             (\"@params\" (", 1639, 0), '$stream_position'(58763, 1639, 0, 58797)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _81142))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _81142))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _81142)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _81142)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@params\" (", 1639, 0), _81142)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@params\" (", 1639, 0), _81142)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _86754))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _86754))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _86754))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _86754))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _86754)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _86754)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _92340))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _92340))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _92340)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _92340)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1639, 0), _92340)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1639, 0), _92340)
   Call: (270) [system] var('$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1639, 0), _92340)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1639, 0), '$VAR'(_99800))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1639, 0), _92340)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1639, 0), _92340)
   Call: (270) [system] '$COMMENT'(";;             (\"@params\" (", 1639, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1639, 0), _92340)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1639, 0), _92340)
   Call: (270) [system] '$COMMENT'(";;             (\"@params\" (", 1639, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1639, 0), _92340)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1639, 0), _92340)
   Call: (270) [system] '$COMMENT'(";;             (\"@params\" (", 1639, 0)==[_109080, _109086]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1639, 0), _92340)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1639, 0), _92340)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1639, 0), _92340)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1639, 0), _92340)
   Call: (270) [system] string('$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1639, 0), _92340)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1639, 0), _92340)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@params\" (", 1639, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@params\" (", 1639, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@params\" (", 1639, 0), _119282, _119284)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT', [";;             (\"@params\" (", 1639, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@params\" (", 1639, 0], _123024)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@params\" (", 1639, 0], _123024)
   Call: (271) [apply] apply:maplist_([";;             (\"@params\" (", 1639, 0], _123024, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@params\" (", 1639, 0], [_125842|_125844], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@params\" (", _125842)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _125842)
   Call: (273) [system] var(";;             (\"@params\" (")
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _125842)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", '$VAR'(_130488))
   Call: (273) [system] atom(";;             (\"@params\" (")
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _125842)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _125842)
   Call: (273) [system] ";;             (\"@params\" ("==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _125842)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _125842)
   Call: (273) [system] ";;             (\"@params\" ("==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _125842)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _125842)
   Call: (273) [system] ";;             (\"@params\" ("==[_139768, _139774]
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _125842)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _125842)
   Call: (273) [system] is_list(";;             (\"@params\" (")
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _125842)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _125842)
   Call: (273) [system] string(";;             (\"@params\" (")
   Exit: (273) [system] string(";;             (\"@params\" (")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _125842)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _125842)
   Call: (273) [system] compound(";;             (\"@params\" (")
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _125842)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _125842)
^  Call: (273) [user] symbol(";;             (\"@params\" (")
^  Unify: (273) [user] symbol(";;             (\"@params\" (")
   Call: (274) [system] atom(";;             (\"@params\" (")
   Fail: (274) [system] atom(";;             (\"@params\" (")
^  Fail: (273) [user] symbol(";;             (\"@params\" (")
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _125842)
   Call: (273) [system] ";;             (\"@params\" ("=_125842
   Exit: (273) [system] ";;             (\"@params\" ("=";;             (\"@params\" ("
^  Exit: (272) [user] mfix_vars1(";;             (\"@params\" (", ";;             (\"@params\" (")
   Call: (272) [apply] apply:maplist_([1639, 0], _125844, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1639, 0], [_163840|_163842], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1639, _163840)
^  Unify: (273) [user] mfix_vars1(1639, _163840)
   Call: (274) [system] var(1639)
^  Redo: (273) [user] mfix_vars1(1639, _163840)
^  Unify: (273) [user] mfix_vars1(1639, '$VAR'(_168486))
   Call: (274) [system] atom(1639)
^  Redo: (273) [user] mfix_vars1(1639, _163840)
^  Unify: (273) [user] mfix_vars1(1639, _163840)
   Call: (274) [system] 1639==true
^  Redo: (273) [user] mfix_vars1(1639, _163840)
^  Unify: (273) [user] mfix_vars1(1639, _163840)
   Call: (274) [system] 1639==false
^  Redo: (273) [user] mfix_vars1(1639, _163840)
^  Unify: (273) [user] mfix_vars1(1639, _163840)
   Call: (274) [system] 1639==[_177766, _177772]
^  Redo: (273) [user] mfix_vars1(1639, _163840)
^  Unify: (273) [user] mfix_vars1(1639, _163840)
   Call: (274) [system] is_list(1639)
^  Redo: (273) [user] mfix_vars1(1639, _163840)
^  Unify: (273) [user] mfix_vars1(1639, _163840)
   Call: (274) [system] string(1639)
^  Redo: (273) [user] mfix_vars1(1639, _163840)
^  Unify: (273) [user] mfix_vars1(1639, _163840)
   Call: (274) [system] compound(1639)
^  Redo: (273) [user] mfix_vars1(1639, _163840)
^  Unify: (273) [user] mfix_vars1(1639, _163840)
^  Call: (274) [user] symbol(1639)
^  Unify: (274) [user] symbol(1639)
   Call: (275) [system] atom(1639)
   Fail: (275) [system] atom(1639)
^  Fail: (274) [user] symbol(1639)
^  Redo: (273) [user] mfix_vars1(1639, _163840)
   Call: (274) [system] 1639=_163840
   Exit: (274) [system] 1639=1639
^  Exit: (273) [user] mfix_vars1(1639, 1639)
   Call: (273) [apply] apply:maplist_([0], _163842, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_198166|_198168], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _198166)
^  Unify: (274) [user] mfix_vars1(0, _198166)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _198166)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_202812))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _198166)
^  Unify: (274) [user] mfix_vars1(0, _198166)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _198166)
^  Unify: (274) [user] mfix_vars1(0, _198166)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _198166)
^  Unify: (274) [user] mfix_vars1(0, _198166)
   Call: (275) [system] 0==[_212092, _212098]
^  Redo: (274) [user] mfix_vars1(0, _198166)
^  Unify: (274) [user] mfix_vars1(0, _198166)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _198166)
^  Unify: (274) [user] mfix_vars1(0, _198166)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _198166)
^  Unify: (274) [user] mfix_vars1(0, _198166)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _198166)
^  Unify: (274) [user] mfix_vars1(0, _198166)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _198166)
   Call: (275) [system] 0=_198166
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _198168, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1639, 0], [1639, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@params\" (", 1639, 0], [";;             (\"@params\" (", 1639, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@params\" (", 1639, 0], [";;             (\"@params\" (", 1639, 0])
   Call: (270) [system] compound_name_arguments(_92340, '$COMMENT', [";;             (\"@params\" (", 1639, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT', [";;             (\"@params\" (", 1639, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@params\" (", 1639, 0)\=@='$COMMENT'(";;             (\"@params\" (", 1639, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _86754)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _248340))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _248340))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _248340))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _248340))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _248340)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _248340)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _253926))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _253926))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _253926)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _253926)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@params\" (", 1639, 0), _253926)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@params\" (", 1639, 0)\=@='$COMMENT'(";;             (\"@params\" (", 1639, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _248340)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _81142))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _81142))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _81142))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _81142))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _81142)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _81142)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _276246))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _276246))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _276246)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _276246)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@params\" (", 1639, 0), _276246)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@params\" (", 1639, 0)\=@='$COMMENT'(";;             (\"@params\" (", 1639, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _81142)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@params\" (", 1639, 0)\=@='$COMMENT'(";;             (\"@params\" (", 1639, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1639, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@params\" (", 1639, 0), _305024, [], _305026)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@params\" (", 1639, 0), _305024, [], _305026)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@params\" (", 1639, 0), _305024, [], _305026)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@params\" (", 1639, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@params\" (", 1639, 0), _305024, [], _305026)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@params\" (", 1639, 0), _305024, [], _305026)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@params\" (", 1639, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@params\" (", 1639, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@params\" (", 1639, 0), _314340, _314342)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT', [";;             (\"@params\" (", 1639, 0])
^  Call: (258) [user] subst_vars([";;             (\"@params\" (", 1639, 0], _316226, [], _305026)
^  Unify: (258) [user] subst_vars([";;             (\"@params\" (", 1639, 0], [";;             (\"@params\" (", 1639, 0], [], [])
   Call: (259) [system] var([";;             (\"@params\" (", 1639, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@params\" (", 1639, 0], _316226, [], _305026)
^  Unify: (258) [user] subst_vars([";;             (\"@params\" (", 1639, 0], [_319962|_319964], [], _305026)
^  Call: (259) [user] subst_vars(";;             (\"@params\" (", _319962, [], _320902)
^  Unify: (259) [user] subst_vars(";;             (\"@params\" (", ";;             (\"@params\" (", [], [])
   Call: (260) [system] var(";;             (\"@params\" (")
^  Redo: (259) [user] subst_vars(";;             (\"@params\" (", _319962, [], _320902)
^  Unify: (259) [user] subst_vars(";;             (\"@params\" (", _319962, [], _320902)
   Call: (260) [system] atom(";;             (\"@params\" (")
^  Redo: (259) [user] subst_vars(";;             (\"@params\" (", _319962, [], _320902)
^  Unify: (259) [user] subst_vars(";;             (\"@params\" (", _319962, [], _320902)
   Call: (260) [system] compound(";;             (\"@params\" (")
^  Redo: (259) [user] subst_vars(";;             (\"@params\" (", _319962, [], _320902)
^  Unify: (259) [user] subst_vars(";;             (\"@params\" (", ";;             (\"@params\" (", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@params\" (", ";;             (\"@params\" (", [], [])
^  Call: (259) [user] subst_vars([1639, 0], _319964, [], _305026)
^  Unify: (259) [user] subst_vars([1639, 0], [1639, 0], [], [])
   Call: (260) [system] var([1639, 0])
^  Redo: (259) [user] subst_vars([1639, 0], _319964, [], _305026)
^  Unify: (259) [user] subst_vars([1639, 0], [_335834|_335836], [], _305026)
^  Call: (260) [user] subst_vars(1639, _335834, [], _336774)
^  Unify: (260) [user] subst_vars(1639, 1639, [], [])
   Call: (261) [system] var(1639)
^  Redo: (260) [user] subst_vars(1639, _335834, [], _336774)
^  Unify: (260) [user] subst_vars(1639, _335834, [], _336774)
   Call: (261) [system] atom(1639)
^  Redo: (260) [user] subst_vars(1639, _335834, [], _336774)
^  Unify: (260) [user] subst_vars(1639, _335834, [], _336774)
   Call: (261) [system] compound(1639)
^  Redo: (260) [user] subst_vars(1639, _335834, [], _336774)
^  Unify: (260) [user] subst_vars(1639, 1639, [], [])
^  Exit: (260) [user] subst_vars(1639, 1639, [], [])
^  Call: (260) [user] subst_vars([0], _335836, [], _305026)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _335836, [], _305026)
^  Unify: (260) [user] subst_vars([0], [_351706|_351708], [], _305026)
^  Call: (261) [user] subst_vars(0, _351706, [], _352646)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _351706, [], _352646)
^  Unify: (261) [user] subst_vars(0, _351706, [], _352646)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _351706, [], _352646)
^  Unify: (261) [user] subst_vars(0, _351706, [], _352646)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _351706, [], _352646)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _351708, [], _305026)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _351708, [], _305026)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1639, 0], [1639, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@params\" (", 1639, 0], [";;             (\"@params\" (", 1639, 0], [], [])
   Call: (258) [system] compound_name_arguments(_305024, '$COMMENT', [";;             (\"@params\" (", 1639, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT', [";;             (\"@params\" (", 1639, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@params\" (", 1639, 0), '$COMMENT'(";;             (\"@params\" (", 1639, 0), [], [])
   Call: (257) [system] _375064=metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1639, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1639, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1639, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1639, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1639, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1639, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1639, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1639, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1639, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1640, 0, 58791, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$stream_position'(58791, 1640, 0, 58825)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _427802))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _427802))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _427802)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _427802)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _427802)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _427802)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _433414))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _433414))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _433414))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _433414))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _433414)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _433414)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _439000))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _439000))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _439000)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _439000)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _439000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _439000)
   Call: (270) [system] var('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _439000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$VAR'(_446460))
   Call: (270) [system] atom('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _439000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _439000)
   Call: (270) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _439000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _439000)
   Call: (270) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _439000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _439000)
   Call: (270) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0)==[_455740, _455746]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _439000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _439000)
   Call: (270) [system] is_list('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _439000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _439000)
   Call: (270) [system] string('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _439000)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _439000)
   Call: (270) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
   Exit: (270) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _465942, _465944)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0], _469684)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0], _469684)
   Call: (271) [apply] apply:maplist_([";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0], _469684, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0], [_472502|_472504], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _472502)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _472502)
   Call: (273) [system] var(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _472502)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", '$VAR'(_477148))
   Call: (273) [system] atom(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _472502)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _472502)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))"==true
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _472502)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _472502)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))"==false
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _472502)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _472502)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))"==[_486428, _486434]
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _472502)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _472502)
   Call: (273) [system] is_list(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _472502)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _472502)
   Call: (273) [system] string(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
   Exit: (273) [system] string(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _472502)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _472502)
   Call: (273) [system] compound(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _472502)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _472502)
^  Call: (273) [user] symbol(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Unify: (273) [user] symbol(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
   Call: (274) [system] atom(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
   Fail: (274) [system] atom(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Fail: (273) [user] symbol(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _472502)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))"=_472502
   Exit: (273) [system] ";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))"=";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))"
^  Exit: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", ";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
   Call: (272) [apply] apply:maplist_([1640, 0], _472504, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1640, 0], [_510500|_510502], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1640, _510500)
^  Unify: (273) [user] mfix_vars1(1640, _510500)
   Call: (274) [system] var(1640)
^  Redo: (273) [user] mfix_vars1(1640, _510500)
^  Unify: (273) [user] mfix_vars1(1640, '$VAR'(_515146))
   Call: (274) [system] atom(1640)
^  Redo: (273) [user] mfix_vars1(1640, _510500)
^  Unify: (273) [user] mfix_vars1(1640, _510500)
   Call: (274) [system] 1640==true
^  Redo: (273) [user] mfix_vars1(1640, _510500)
^  Unify: (273) [user] mfix_vars1(1640, _510500)
   Call: (274) [system] 1640==false
^  Redo: (273) [user] mfix_vars1(1640, _510500)
^  Unify: (273) [user] mfix_vars1(1640, _6050)
   Call: (274) [system] 1640==[_6584, _6590]
^  Redo: (273) [user] mfix_vars1(1640, _6050)
^  Unify: (273) [user] mfix_vars1(1640, _6050)
   Call: (274) [system] is_list(1640)
^  Redo: (273) [user] mfix_vars1(1640, _6050)
^  Unify: (273) [user] mfix_vars1(1640, _6050)
   Call: (274) [system] string(1640)
^  Redo: (273) [user] mfix_vars1(1640, _6050)
^  Unify: (273) [user] mfix_vars1(1640, _6050)
   Call: (274) [system] compound(1640)
^  Redo: (273) [user] mfix_vars1(1640, _6050)
^  Unify: (273) [user] mfix_vars1(1640, _6050)
^  Call: (274) [user] symbol(1640)
^  Unify: (274) [user] symbol(1640)
   Call: (275) [system] atom(1640)
   Fail: (275) [system] atom(1640)
^  Fail: (274) [user] symbol(1640)
^  Redo: (273) [user] mfix_vars1(1640, _6050)
   Call: (274) [system] 1640=_6050
   Exit: (274) [system] 1640=1640
^  Exit: (273) [user] mfix_vars1(1640, 1640)
   Call: (273) [apply] apply:maplist_([0], _6052, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_26984|_26986], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _26984)
^  Unify: (274) [user] mfix_vars1(0, _26984)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _26984)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_31630))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _26984)
^  Unify: (274) [user] mfix_vars1(0, _26984)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _26984)
^  Unify: (274) [user] mfix_vars1(0, _26984)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _26984)
^  Unify: (274) [user] mfix_vars1(0, _26984)
   Call: (275) [system] 0==[_40910, _40916]
^  Redo: (274) [user] mfix_vars1(0, _26984)
^  Unify: (274) [user] mfix_vars1(0, _26984)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _26984)
^  Unify: (274) [user] mfix_vars1(0, _26984)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _26984)
^  Unify: (274) [user] mfix_vars1(0, _26984)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _26984)
^  Unify: (274) [user] mfix_vars1(0, _26984)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _26984)
   Call: (275) [system] 0=_26984
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _26986, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1640, 0], [1640, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0], [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0], [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0])
   Call: (270) [system] compound_name_arguments(_5998, '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0)))
   Call: (267) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _5984)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _77158))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _77158))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _77158))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _77158))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _77158)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _77158)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _82744))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _82744))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _82744)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _82744)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _82744)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0)))
   Call: (267) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _77158)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _5964))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _5964))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _5964))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _5964))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _5964)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _5964)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _105064))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _105064))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _105064)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _105064)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _105064)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0)))
   Call: (267) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _5964)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0)))
   Call: (261) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _133842, [], _133844)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _133842, [], _133844)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _133842, [], _133844)
   Call: (258) [system] atom('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _133842, [], _133844)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _133842, [], _133844)
   Call: (258) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
   Exit: (258) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), _143158, _143160)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0])
^  Call: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0], _145044, [], _133844)
^  Unify: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0], [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0], [], [])
   Call: (259) [system] var([";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0])
^  Redo: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0], _145044, [], _133844)
^  Unify: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0], [_148780|_148782], [], _133844)
^  Call: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _148780, [], _149720)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", ";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", [], [])
   Call: (260) [system] var(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _148780, [], _149720)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _148780, [], _149720)
   Call: (260) [system] atom(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _148780, [], _149720)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _148780, [], _149720)
   Call: (260) [system] compound(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", _148780, [], _149720)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", ";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", [], [])
^  Exit: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", ";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", [], [])
^  Call: (259) [user] subst_vars([1640, 0], _148782, [], _133844)
^  Unify: (259) [user] subst_vars([1640, 0], [1640, 0], [], [])
   Call: (260) [system] var([1640, 0])
^  Redo: (259) [user] subst_vars([1640, 0], _148782, [], _133844)
^  Unify: (259) [user] subst_vars([1640, 0], [_164652|_164654], [], _133844)
^  Call: (260) [user] subst_vars(1640, _164652, [], _165592)
^  Unify: (260) [user] subst_vars(1640, 1640, [], [])
   Call: (261) [system] var(1640)
^  Redo: (260) [user] subst_vars(1640, _164652, [], _165592)
^  Unify: (260) [user] subst_vars(1640, _164652, [], _165592)
   Call: (261) [system] atom(1640)
^  Redo: (260) [user] subst_vars(1640, _164652, [], _165592)
^  Unify: (260) [user] subst_vars(1640, _164652, [], _165592)
   Call: (261) [system] compound(1640)
^  Redo: (260) [user] subst_vars(1640, _164652, [], _165592)
^  Unify: (260) [user] subst_vars(1640, 1640, [], [])
^  Exit: (260) [user] subst_vars(1640, 1640, [], [])
^  Call: (260) [user] subst_vars([0], _164654, [], _133844)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _164654, [], _133844)
^  Unify: (260) [user] subst_vars([0], [_180524|_180526], [], _133844)
^  Call: (261) [user] subst_vars(0, _180524, [], _181464)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _180524, [], _181464)
^  Unify: (261) [user] subst_vars(0, _180524, [], _181464)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _180524, [], _181464)
^  Unify: (261) [user] subst_vars(0, _180524, [], _181464)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _180524, [], _181464)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _180526, [], _133844)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _180526, [], _133844)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1640, 0], [1640, 0], [], [])
^  Exit: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0], [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0], [], [])
   Call: (258) [system] compound_name_arguments(_133842, '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), [], [])
   Call: (257) [system] _203882=metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg1Type\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1640, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1641, 0, 58886, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$stream_position'(58886, 1641, 0, 58920)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _256622))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _256622))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _256622)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _256622)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _256622)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _256622)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _262234))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _262234))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _262234))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _262234))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _262234)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _262234)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _267820))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _267820))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _267820)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _267820)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _267820)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _267820)
   Call: (270) [system] var('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _267820)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$VAR'(_275280))
   Call: (270) [system] atom('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _267820)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _267820)
   Call: (270) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _267820)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _267820)
   Call: (270) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _267820)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _267820)
   Call: (270) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0)==[_284560, _284566]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _267820)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _267820)
   Call: (270) [system] is_list('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _267820)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _267820)
   Call: (270) [system] string('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _267820)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _267820)
   Call: (270) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
   Exit: (270) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _294762, _294764)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0], _298504)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0], _298504)
   Call: (271) [apply] apply:maplist_([";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0], _298504, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0], [_301322|_301324], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _301322)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _301322)
   Call: (273) [system] var(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _301322)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", '$VAR'(_305968))
   Call: (273) [system] atom(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _301322)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _301322)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))"==true
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _301322)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _301322)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))"==false
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _301322)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _301322)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))"==[_315248, _315254]
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _301322)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _301322)
   Call: (273) [system] is_list(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _301322)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _301322)
   Call: (273) [system] string(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
   Exit: (273) [system] string(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _301322)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _301322)
   Call: (273) [system] compound(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _301322)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _301322)
^  Call: (273) [user] symbol(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Unify: (273) [user] symbol(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
   Call: (274) [system] atom(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
   Fail: (274) [system] atom(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Fail: (273) [user] symbol(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _301322)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))"=_301322
   Exit: (273) [system] ";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))"=";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))"
^  Exit: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", ";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
   Call: (272) [apply] apply:maplist_([1641, 0], _301324, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1641, 0], [_339320|_339322], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1641, _339320)
^  Unify: (273) [user] mfix_vars1(1641, _339320)
   Call: (274) [system] var(1641)
^  Redo: (273) [user] mfix_vars1(1641, _339320)
^  Unify: (273) [user] mfix_vars1(1641, '$VAR'(_343966))
   Call: (274) [system] atom(1641)
^  Redo: (273) [user] mfix_vars1(1641, _339320)
^  Unify: (273) [user] mfix_vars1(1641, _339320)
   Call: (274) [system] 1641==true
^  Redo: (273) [user] mfix_vars1(1641, _339320)
^  Unify: (273) [user] mfix_vars1(1641, _339320)
   Call: (274) [system] 1641==false
^  Redo: (273) [user] mfix_vars1(1641, _339320)
^  Unify: (273) [user] mfix_vars1(1641, _339320)
   Call: (274) [system] 1641==[_353246, _353252]
^  Redo: (273) [user] mfix_vars1(1641, _339320)
^  Unify: (273) [user] mfix_vars1(1641, _339320)
   Call: (274) [system] is_list(1641)
^  Redo: (273) [user] mfix_vars1(1641, _339320)
^  Unify: (273) [user] mfix_vars1(1641, _339320)
   Call: (274) [system] string(1641)
^  Redo: (273) [user] mfix_vars1(1641, _339320)
^  Unify: (273) [user] mfix_vars1(1641, _339320)
   Call: (274) [system] compound(1641)
^  Redo: (273) [user] mfix_vars1(1641, _339320)
^  Unify: (273) [user] mfix_vars1(1641, _339320)
^  Call: (274) [user] symbol(1641)
^  Unify: (274) [user] symbol(1641)
   Call: (275) [system] atom(1641)
   Fail: (275) [system] atom(1641)
^  Fail: (274) [user] symbol(1641)
^  Redo: (273) [user] mfix_vars1(1641, _339320)
   Call: (274) [system] 1641=_339320
   Exit: (274) [system] 1641=1641
^  Exit: (273) [user] mfix_vars1(1641, 1641)
   Call: (273) [apply] apply:maplist_([0], _339322, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_373646|_373648], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _373646)
^  Unify: (274) [user] mfix_vars1(0, _373646)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _373646)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_378292))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _373646)
^  Unify: (274) [user] mfix_vars1(0, _373646)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _373646)
^  Unify: (274) [user] mfix_vars1(0, _373646)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _373646)
^  Unify: (274) [user] mfix_vars1(0, _373646)
   Call: (275) [system] 0==[_387572, _387578]
^  Redo: (274) [user] mfix_vars1(0, _373646)
^  Unify: (274) [user] mfix_vars1(0, _373646)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _373646)
^  Unify: (274) [user] mfix_vars1(0, _373646)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _373646)
^  Unify: (274) [user] mfix_vars1(0, _373646)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _373646)
^  Unify: (274) [user] mfix_vars1(0, _373646)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _373646)
   Call: (275) [system] 0=_373646
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _373648, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1641, 0], [1641, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0], [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0], [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0])
   Call: (270) [system] compound_name_arguments(_267820, '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0)))
   Call: (267) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _262234)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _423820))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _423820))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _423820))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _423820))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _423820)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _423820)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _429406))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _429406))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _429406)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _429406)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _429406)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0)))
   Call: (267) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _423820)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _256622))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _256622))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _256622))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _256622))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _256622)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _256622)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _451726))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _451726))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _451726)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _451726)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _451726)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0)))
   Call: (267) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _256622)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0)))
   Call: (261) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _480504, [], _480506)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _480504, [], _480506)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _480504, [], _480506)
   Call: (258) [system] atom('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _480504, [], _480506)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _480504, [], _480506)
   Call: (258) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
   Exit: (258) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), _489820, _489822)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0])
^  Call: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0], _491706, [], _480506)
^  Unify: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0], [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0], [], [])
   Call: (259) [system] var([";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0])
^  Redo: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0], _491706, [], _480506)
^  Unify: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0], [_495442|_495444], [], _480506)
^  Call: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _495442, [], _496382)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", ";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", [], [])
   Call: (260) [system] var(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _495442, [], _496382)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _495442, [], _496382)
   Call: (260) [system] atom(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _495442, [], _496382)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _495442, [], _496382)
   Call: (260) [system] compound(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _495442, [], _496382)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", ";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", [], [])
^  Exit: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", ";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", [], [])
^  Call: (259) [user] subst_vars([1641, 0], _495444, [], _480506)
^  Unify: (259) [user] subst_vars([1641, 0], [1641, 0], [], [])
   Call: (260) [system] var([1641, 0])
^  Redo: (259) [user] subst_vars([1641, 0], _495444, [], _480506)
^  Unify: (259) [user] subst_vars([1641, 0], [_511314|_511316], [], _480506)
^  Call: (260) [user] subst_vars(1641, _511314, [], _512254)
^  Unify: (260) [user] subst_vars(1641, 1641, [], [])
   Call: (261) [system] var(1641)
^  Redo: (260) [user] subst_vars(1641, _511314, [], _512254)
^  Unify: (260) [user] subst_vars(1641, _511314, [], _512254)
   Call: (261) [system] atom(1641)
^  Redo: (260) [user] subst_vars(1641, _511314, [], _512254)
^  Unify: (260) [user] subst_vars(1641, _511314, [], _512254)
   Call: (261) [system] compound(1641)
^  Redo: (260) [user] subst_vars(1641, _511314, [], _512254)
^  Unify: (260) [user] subst_vars(1641, 1641, [], [])
^  Exit: (260) [user] subst_vars(1641, 1641, [], [])
^  Call: (260) [user] subst_vars([0], _6000, [], _5962)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _6000, [], _5962)
^  Unify: (260) [user] subst_vars([0], [_9330|_9332], [], _5962)
^  Call: (261) [user] subst_vars(0, _9330, [], _10270)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _9330, [], _10270)
^  Unify: (261) [user] subst_vars(0, _9330, [], _10270)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _9330, [], _10270)
^  Unify: (261) [user] subst_vars(0, _9330, [], _10270)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _9330, [], _10270)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _9332, [], _5962)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _9332, [], _5962)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1641, 0], [1641, 0], [], [])
^  Exit: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0], [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5960, '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), [], [])
   Call: (257) [system] _32688=metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"Arg2Type\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1641, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1642, 0, 58985, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$stream_position'(58985, 1642, 0, 59019)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _85426))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _85426))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _85426)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _85426)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _85426)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _85426)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _91038))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _91038))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _91038))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _91038))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _91038)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _91038)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _96624))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _96624))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _96624)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _96624)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _96624)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _96624)
   Call: (270) [system] var('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _96624)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$VAR'(_104084))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _96624)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _96624)
   Call: (270) [system] '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _96624)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _96624)
   Call: (270) [system] '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _96624)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _96624)
   Call: (270) [system] '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0)==[_113364, _113370]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _96624)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _96624)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _96624)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _96624)
   Call: (270) [system] string('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _96624)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _96624)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _123566, _123568)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT', [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0], _127308)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0], _127308)
   Call: (271) [apply] apply:maplist_([";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0], _127308, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0], [_130126|_130128], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _130126)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _130126)
   Call: (273) [system] var(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _130126)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", '$VAR'(_134772))
   Call: (273) [system] atom(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _130126)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _130126)
   Call: (273) [system] ";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _130126)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _130126)
   Call: (273) [system] ";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _130126)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _130126)
   Call: (273) [system] ";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],"==[_144052, _144058]
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _130126)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _130126)
   Call: (273) [system] is_list(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _130126)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _130126)
   Call: (273) [system] string(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
   Exit: (273) [system] string(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _130126)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _130126)
   Call: (273) [system] compound(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _130126)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _130126)
^  Call: (273) [user] symbol(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Unify: (273) [user] symbol(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
   Call: (274) [system] atom(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
   Fail: (274) [system] atom(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Fail: (273) [user] symbol(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _130126)
   Call: (273) [system] ";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],"=_130126
   Exit: (273) [system] ";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],"=";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],"
^  Exit: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", ";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
   Call: (272) [apply] apply:maplist_([1642, 0], _130128, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1642, 0], [_168124|_168126], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1642, _168124)
^  Unify: (273) [user] mfix_vars1(1642, _168124)
   Call: (274) [system] var(1642)
^  Redo: (273) [user] mfix_vars1(1642, _168124)
^  Unify: (273) [user] mfix_vars1(1642, '$VAR'(_172770))
   Call: (274) [system] atom(1642)
^  Redo: (273) [user] mfix_vars1(1642, _168124)
^  Unify: (273) [user] mfix_vars1(1642, _168124)
   Call: (274) [system] 1642==true
^  Redo: (273) [user] mfix_vars1(1642, _168124)
^  Unify: (273) [user] mfix_vars1(1642, _168124)
   Call: (274) [system] 1642==false
^  Redo: (273) [user] mfix_vars1(1642, _168124)
^  Unify: (273) [user] mfix_vars1(1642, _168124)
   Call: (274) [system] 1642==[_182050, _182056]
^  Redo: (273) [user] mfix_vars1(1642, _168124)
^  Unify: (273) [user] mfix_vars1(1642, _168124)
   Call: (274) [system] is_list(1642)
^  Redo: (273) [user] mfix_vars1(1642, _168124)
^  Unify: (273) [user] mfix_vars1(1642, _168124)
   Call: (274) [system] string(1642)
^  Redo: (273) [user] mfix_vars1(1642, _168124)
^  Unify: (273) [user] mfix_vars1(1642, _168124)
   Call: (274) [system] compound(1642)
^  Redo: (273) [user] mfix_vars1(1642, _168124)
^  Unify: (273) [user] mfix_vars1(1642, _168124)
^  Call: (274) [user] symbol(1642)
^  Unify: (274) [user] symbol(1642)
   Call: (275) [system] atom(1642)
   Fail: (275) [system] atom(1642)
^  Fail: (274) [user] symbol(1642)
^  Redo: (273) [user] mfix_vars1(1642, _168124)
   Call: (274) [system] 1642=_168124
   Exit: (274) [system] 1642=1642
^  Exit: (273) [user] mfix_vars1(1642, 1642)
   Call: (273) [apply] apply:maplist_([0], _168126, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_202450|_202452], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _202450)
^  Unify: (274) [user] mfix_vars1(0, _202450)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _202450)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_207096))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _202450)
^  Unify: (274) [user] mfix_vars1(0, _202450)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _202450)
^  Unify: (274) [user] mfix_vars1(0, _202450)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _202450)
^  Unify: (274) [user] mfix_vars1(0, _202450)
   Call: (275) [system] 0==[_216376, _216382]
^  Redo: (274) [user] mfix_vars1(0, _202450)
^  Unify: (274) [user] mfix_vars1(0, _202450)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _202450)
^  Unify: (274) [user] mfix_vars1(0, _202450)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _202450)
^  Unify: (274) [user] mfix_vars1(0, _202450)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _202450)
^  Unify: (274) [user] mfix_vars1(0, _202450)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _202450)
   Call: (275) [system] 0=_202450
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _202452, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1642, 0], [1642, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0], [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0], [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0])
   Call: (270) [system] compound_name_arguments(_96624, '$COMMENT', [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT', [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0)\=@='$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _91038)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _252624))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _252624))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _252624))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _252624))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _252624)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _252624)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _258210))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _258210))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _258210)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _258210)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _258210)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0)\=@='$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _252624)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _85426))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _85426))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _85426))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _85426))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _85426)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _85426)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _280530))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _280530))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _280530)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _280530)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _280530)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0)\=@='$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _85426)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0)\=@='$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _309308, [], _309310)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _309308, [], _309310)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _309308, [], _309310)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _309308, [], _309310)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _309308, [], _309310)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), _318624, _318626)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT', [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0])
^  Call: (258) [user] subst_vars([";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0], _320510, [], _309310)
^  Unify: (258) [user] subst_vars([";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0], [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0], [], [])
   Call: (259) [system] var([";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0], _320510, [], _309310)
^  Unify: (258) [user] subst_vars([";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0], [_324246|_324248], [], _309310)
^  Call: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _324246, [], _325186)
^  Unify: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", ";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", [], [])
   Call: (260) [system] var(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _324246, [], _325186)
^  Unify: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _324246, [], _325186)
   Call: (260) [system] atom(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _324246, [], _325186)
^  Unify: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _324246, [], _325186)
   Call: (260) [system] compound(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _324246, [], _325186)
^  Unify: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", ";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", ";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", [], [])
^  Call: (259) [user] subst_vars([1642, 0], _324248, [], _309310)
^  Unify: (259) [user] subst_vars([1642, 0], [1642, 0], [], [])
   Call: (260) [system] var([1642, 0])
^  Redo: (259) [user] subst_vars([1642, 0], _324248, [], _309310)
^  Unify: (259) [user] subst_vars([1642, 0], [_340118|_340120], [], _309310)
^  Call: (260) [user] subst_vars(1642, _340118, [], _341058)
^  Unify: (260) [user] subst_vars(1642, 1642, [], [])
   Call: (261) [system] var(1642)
^  Redo: (260) [user] subst_vars(1642, _340118, [], _341058)
^  Unify: (260) [user] subst_vars(1642, _340118, [], _341058)
   Call: (261) [system] atom(1642)
^  Redo: (260) [user] subst_vars(1642, _340118, [], _341058)
^  Unify: (260) [user] subst_vars(1642, _340118, [], _341058)
   Call: (261) [system] compound(1642)
^  Redo: (260) [user] subst_vars(1642, _340118, [], _341058)
^  Unify: (260) [user] subst_vars(1642, 1642, [], [])
^  Exit: (260) [user] subst_vars(1642, 1642, [], [])
^  Call: (260) [user] subst_vars([0], _340120, [], _309310)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _340120, [], _309310)
^  Unify: (260) [user] subst_vars([0], [_355990|_355992], [], _309310)
^  Call: (261) [user] subst_vars(0, _355990, [], _356930)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _355990, [], _356930)
^  Unify: (261) [user] subst_vars(0, _355990, [], _356930)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _355990, [], _356930)
^  Unify: (261) [user] subst_vars(0, _355990, [], _356930)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _355990, [], _356930)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _355992, [], _309310)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _355992, [], _309310)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1642, 0], [1642, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0], [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0], [], [])
   Call: (258) [system] compound_name_arguments(_309308, '$COMMENT', [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT', [";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), [], [])
   Call: (257) [system] _379348=metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"ReturnType\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1642, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1643, 0, 59080, '$COMMENT'(";;     ]));", 1643, 0), '$stream_position'(59080, 1643, 0, 59114)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1643, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1643, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     ]));", 1643, 0), _432066))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     ]));", 1643, 0), _432066))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     ]));", 1643, 0), _432066)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     ]));", 1643, 0), _432066)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     ]));", 1643, 0), _432066)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     ]));", 1643, 0), _432066)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     ]));", 1643, 0), _437678))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1643, 0), _437678))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1643, 0), _437678))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1643, 0), _437678))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1643, 0), _437678)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1643, 0), _437678)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     ]));", 1643, 0), _443264))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     ]));", 1643, 0), _443264))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     ]));", 1643, 0), _443264)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     ]));", 1643, 0), _443264)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1643, 0), _443264)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1643, 0), _443264)
   Call: (270) [system] var('$COMMENT'(";;     ]));", 1643, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1643, 0), _443264)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1643, 0), '$VAR'(_450724))
   Call: (270) [system] atom('$COMMENT'(";;     ]));", 1643, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1643, 0), _443264)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1643, 0), _443264)
   Call: (270) [system] '$COMMENT'(";;     ]));", 1643, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1643, 0), _443264)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1643, 0), _443264)
   Call: (270) [system] '$COMMENT'(";;     ]));", 1643, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1643, 0), _443264)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1643, 0), _443264)
   Call: (270) [system] '$COMMENT'(";;     ]));", 1643, 0)==[_460004, _460010]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1643, 0), _443264)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1643, 0), _443264)
   Call: (270) [system] is_list('$COMMENT'(";;     ]));", 1643, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1643, 0), _443264)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1643, 0), _443264)
   Call: (270) [system] string('$COMMENT'(";;     ]));", 1643, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1643, 0), _443264)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1643, 0), _443264)
   Call: (270) [system] compound('$COMMENT'(";;     ]));", 1643, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     ]));", 1643, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1643, 0), _470206, _470208)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1643, 0), '$COMMENT', [";;     ]));", 1643, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     ]));", 1643, 0], _473948)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     ]));", 1643, 0], _473948)
   Call: (271) [apply] apply:maplist_([";;     ]));", 1643, 0], _473948, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     ]));", 1643, 0], [_476766|_476768], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     ]));", _476766)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _476766)
   Call: (273) [system] var(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _476766)
^  Unify: (272) [user] mfix_vars1(";;     ]));", '$VAR'(_481412))
   Call: (273) [system] atom(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _476766)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _476766)
   Call: (273) [system] ";;     ]));"==true
^  Redo: (272) [user] mfix_vars1(";;     ]));", _476766)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _476766)
   Call: (273) [system] ";;     ]));"==false
^  Redo: (272) [user] mfix_vars1(";;     ]));", _476766)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _476766)
   Call: (273) [system] ";;     ]));"==[_490692, _490698]
^  Redo: (272) [user] mfix_vars1(";;     ]));", _476766)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _476766)
   Call: (273) [system] is_list(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _476766)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _476766)
   Call: (273) [system] string(";;     ]));")
   Exit: (273) [system] string(";;     ]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     ]));", _476766)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _476766)
   Call: (273) [system] compound(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _476766)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _476766)
^  Call: (273) [user] symbol(";;     ]));")
^  Unify: (273) [user] symbol(";;     ]));")
   Call: (274) [system] atom(";;     ]));")
   Fail: (274) [system] atom(";;     ]));")
^  Fail: (273) [user] symbol(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _476766)
   Call: (273) [system] ";;     ]));"=_476766
   Exit: (273) [system] ";;     ]));"=";;     ]));"
^  Exit: (272) [user] mfix_vars1(";;     ]));", ";;     ]));")
   Call: (272) [apply] apply:maplist_([1643, 0], _476768, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1643, 0], [_514764|_514766], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1643, _514764)
^  Unify: (273) [user] mfix_vars1(1643, _514764)
   Call: (274) [system] var(1643)
^  Redo: (273) [user] mfix_vars1(1643, _514764)
^  Unify: (273) [user] mfix_vars1(1643, '$VAR'(_519410))
   Call: (274) [system] atom(1643)
^  Redo: (273) [user] mfix_vars1(1643, _514764)
^  Unify: (273) [user] mfix_vars1(1643, _514764)
   Call: (274) [system] 1643==true
^  Redo: (273) [user] mfix_vars1(1643, _6030)
^  Unify: (273) [user] mfix_vars1(1643, _6030)
   Call: (274) [system] 1643==false
^  Redo: (273) [user] mfix_vars1(1643, _6030)
^  Unify: (273) [user] mfix_vars1(1643, _6030)
   Call: (274) [system] 1643==[_10624, _10630]
^  Redo: (273) [user] mfix_vars1(1643, _6030)
^  Unify: (273) [user] mfix_vars1(1643, _6030)
   Call: (274) [system] is_list(1643)
^  Redo: (273) [user] mfix_vars1(1643, _6030)
^  Unify: (273) [user] mfix_vars1(1643, _6030)
   Call: (274) [system] string(1643)
^  Redo: (273) [user] mfix_vars1(1643, _6030)
^  Unify: (273) [user] mfix_vars1(1643, _6030)
   Call: (274) [system] compound(1643)
^  Redo: (273) [user] mfix_vars1(1643, _6030)
^  Unify: (273) [user] mfix_vars1(1643, _6030)
^  Call: (274) [user] symbol(1643)
^  Unify: (274) [user] symbol(1643)
   Call: (275) [system] atom(1643)
   Fail: (275) [system] atom(1643)
^  Fail: (274) [user] symbol(1643)
^  Redo: (273) [user] mfix_vars1(1643, _6030)
   Call: (274) [system] 1643=_6030
   Exit: (274) [system] 1643=1643
^  Exit: (273) [user] mfix_vars1(1643, 1643)
   Call: (273) [apply] apply:maplist_([0], _6032, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_31024|_31026], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _31024)
^  Unify: (274) [user] mfix_vars1(0, _31024)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _31024)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_35670))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _31024)
^  Unify: (274) [user] mfix_vars1(0, _31024)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _31024)
^  Unify: (274) [user] mfix_vars1(0, _31024)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _31024)
^  Unify: (274) [user] mfix_vars1(0, _31024)
   Call: (275) [system] 0==[_44950, _44956]
^  Redo: (274) [user] mfix_vars1(0, _31024)
^  Unify: (274) [user] mfix_vars1(0, _31024)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _31024)
^  Unify: (274) [user] mfix_vars1(0, _31024)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _31024)
^  Unify: (274) [user] mfix_vars1(0, _31024)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _31024)
^  Unify: (274) [user] mfix_vars1(0, _31024)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _31024)
   Call: (275) [system] 0=_31024
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _31026, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1643, 0], [1643, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     ]));", 1643, 0], [";;     ]));", 1643, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     ]));", 1643, 0], [";;     ]));", 1643, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";;     ]));", 1643, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1643, 0), '$COMMENT', [";;     ]));", 1643, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0)))
   Call: (267) [system] '$COMMENT'(";;     ]));", 1643, 0)\=@='$COMMENT'(";;     ]));", 1643, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1643, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     ]));", 1643, 0), _81198))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1643, 0), _81198))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1643, 0), _81198))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1643, 0), _81198))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1643, 0), _81198)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1643, 0), _81198)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     ]));", 1643, 0), _86784))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     ]));", 1643, 0), _86784))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     ]));", 1643, 0), _86784)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     ]));", 1643, 0), _86784)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     ]));", 1643, 0), _86784)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0)))
   Call: (267) [system] '$COMMENT'(";;     ]));", 1643, 0)\=@='$COMMENT'(";;     ]));", 1643, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1643, 0), _81198)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     ]));", 1643, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1643, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1643, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1643, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1643, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1643, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     ]));", 1643, 0), _109104))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     ]));", 1643, 0), _109104))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     ]));", 1643, 0), _109104)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     ]));", 1643, 0), _109104)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     ]));", 1643, 0), _109104)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0)))
   Call: (267) [system] '$COMMENT'(";;     ]));", 1643, 0)\=@='$COMMENT'(";;     ]));", 1643, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1643, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0)))
   Call: (261) [system] '$COMMENT'(";;     ]));", 1643, 0)\=@='$COMMENT'(";;     ]));", 1643, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1643, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1643, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1643, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1643, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1643, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1643, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1643, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1643, 0), _137882, [], _137884)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     ]));", 1643, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1643, 0), _137882, [], _137884)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1643, 0), _137882, [], _137884)
   Call: (258) [system] atom('$COMMENT'(";;     ]));", 1643, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1643, 0), _137882, [], _137884)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1643, 0), _137882, [], _137884)
   Call: (258) [system] compound('$COMMENT'(";;     ]));", 1643, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     ]));", 1643, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1643, 0), _147198, _147200)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1643, 0), '$COMMENT', [";;     ]));", 1643, 0])
^  Call: (258) [user] subst_vars([";;     ]));", 1643, 0], _149084, [], _137884)
^  Unify: (258) [user] subst_vars([";;     ]));", 1643, 0], [";;     ]));", 1643, 0], [], [])
   Call: (259) [system] var([";;     ]));", 1643, 0])
^  Redo: (258) [user] subst_vars([";;     ]));", 1643, 0], _149084, [], _137884)
^  Unify: (258) [user] subst_vars([";;     ]));", 1643, 0], [_152820|_152822], [], _137884)
^  Call: (259) [user] subst_vars(";;     ]));", _152820, [], _153760)
^  Unify: (259) [user] subst_vars(";;     ]));", ";;     ]));", [], [])
   Call: (260) [system] var(";;     ]));")
^  Redo: (259) [user] subst_vars(";;     ]));", _152820, [], _153760)
^  Unify: (259) [user] subst_vars(";;     ]));", _152820, [], _153760)
   Call: (260) [system] atom(";;     ]));")
^  Redo: (259) [user] subst_vars(";;     ]));", _152820, [], _153760)
^  Unify: (259) [user] subst_vars(";;     ]));", _152820, [], _153760)
   Call: (260) [system] compound(";;     ]));")
^  Redo: (259) [user] subst_vars(";;     ]));", _152820, [], _153760)
^  Unify: (259) [user] subst_vars(";;     ]));", ";;     ]));", [], [])
^  Exit: (259) [user] subst_vars(";;     ]));", ";;     ]));", [], [])
^  Call: (259) [user] subst_vars([1643, 0], _152822, [], _137884)
^  Unify: (259) [user] subst_vars([1643, 0], [1643, 0], [], [])
   Call: (260) [system] var([1643, 0])
^  Redo: (259) [user] subst_vars([1643, 0], _152822, [], _137884)
^  Unify: (259) [user] subst_vars([1643, 0], [_168692|_168694], [], _137884)
^  Call: (260) [user] subst_vars(1643, _168692, [], _169632)
^  Unify: (260) [user] subst_vars(1643, 1643, [], [])
   Call: (261) [system] var(1643)
^  Redo: (260) [user] subst_vars(1643, _168692, [], _169632)
^  Unify: (260) [user] subst_vars(1643, _168692, [], _169632)
   Call: (261) [system] atom(1643)
^  Redo: (260) [user] subst_vars(1643, _168692, [], _169632)
^  Unify: (260) [user] subst_vars(1643, _168692, [], _169632)
   Call: (261) [system] compound(1643)
^  Redo: (260) [user] subst_vars(1643, _168692, [], _169632)
^  Unify: (260) [user] subst_vars(1643, 1643, [], [])
^  Exit: (260) [user] subst_vars(1643, 1643, [], [])
^  Call: (260) [user] subst_vars([0], _168694, [], _137884)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _168694, [], _137884)
^  Unify: (260) [user] subst_vars([0], [_184564|_184566], [], _137884)
^  Call: (261) [user] subst_vars(0, _184564, [], _185504)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _184564, [], _185504)
^  Unify: (261) [user] subst_vars(0, _184564, [], _185504)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _184564, [], _185504)
^  Unify: (261) [user] subst_vars(0, _184564, [], _185504)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _184564, [], _185504)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _184566, [], _137884)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _184566, [], _137884)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1643, 0], [1643, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     ]));", 1643, 0], [";;     ]));", 1643, 0], [], [])
   Call: (258) [system] compound_name_arguments(_137882, '$COMMENT', [";;     ]));", 1643, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1643, 0), '$COMMENT', [";;     ]));", 1643, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1643, 0), '$COMMENT'(";;     ]));", 1643, 0), [], [])
   Call: (257) [system] _207922=metta_file_buffer(+, '$COMMENT'(";;     ]));", 1643, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     ]));", 1643, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     ]));", 1643, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     ]));", 1643, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     ]));", 1643, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1643, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1643, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1643, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1643, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1644, 0, 59092, '$COMMENT'(";; }", 1644, 0), '$stream_position'(59092, 1644, 0, 59126)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1644, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1644, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; }", 1644, 0), _260638))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1644, 0), _260638))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; }", 1644, 0), _260638)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1644, 0), _260638)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1644, 0), _260638)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1644, 0), _260638)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; }", 1644, 0), _266250))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1644, 0), _266250))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1644, 0), _266250))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1644, 0), _266250))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1644, 0), _266250)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1644, 0), _266250)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; }", 1644, 0), _271836))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1644, 0), _271836))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; }", 1644, 0), _271836)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1644, 0), _271836)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; }", 1644, 0), _271836)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1644, 0), _271836)
   Call: (270) [system] var('$COMMENT'(";; }", 1644, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1644, 0), _271836)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1644, 0), '$VAR'(_279296))
   Call: (270) [system] atom('$COMMENT'(";; }", 1644, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1644, 0), _271836)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1644, 0), _271836)
   Call: (270) [system] '$COMMENT'(";; }", 1644, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1644, 0), _271836)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1644, 0), _271836)
   Call: (270) [system] '$COMMENT'(";; }", 1644, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1644, 0), _271836)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1644, 0), _271836)
   Call: (270) [system] '$COMMENT'(";; }", 1644, 0)==[_288576, _288582]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1644, 0), _271836)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1644, 0), _271836)
   Call: (270) [system] is_list('$COMMENT'(";; }", 1644, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1644, 0), _271836)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1644, 0), _271836)
   Call: (270) [system] string('$COMMENT'(";; }", 1644, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1644, 0), _271836)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1644, 0), _271836)
   Call: (270) [system] compound('$COMMENT'(";; }", 1644, 0))
   Exit: (270) [system] compound('$COMMENT'(";; }", 1644, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1644, 0), _298778, _298780)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1644, 0), '$COMMENT', [";; }", 1644, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; }", 1644, 0], _302520)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1644, 0], _302520)
   Call: (271) [apply] apply:maplist_([";; }", 1644, 0], _302520, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; }", 1644, 0], [_305338|_305340], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; }", _305338)
^  Unify: (272) [user] mfix_vars1(";; }", _305338)
   Call: (273) [system] var(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _305338)
^  Unify: (272) [user] mfix_vars1(";; }", '$VAR'(_309984))
   Call: (273) [system] atom(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _305338)
^  Unify: (272) [user] mfix_vars1(";; }", _305338)
   Call: (273) [system] ";; }"==true
^  Redo: (272) [user] mfix_vars1(";; }", _305338)
^  Unify: (272) [user] mfix_vars1(";; }", _305338)
   Call: (273) [system] ";; }"==false
^  Redo: (272) [user] mfix_vars1(";; }", _305338)
^  Unify: (272) [user] mfix_vars1(";; }", _305338)
   Call: (273) [system] ";; }"==[_319264, _319270]
^  Redo: (272) [user] mfix_vars1(";; }", _305338)
^  Unify: (272) [user] mfix_vars1(";; }", _305338)
   Call: (273) [system] is_list(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _305338)
^  Unify: (272) [user] mfix_vars1(";; }", _305338)
   Call: (273) [system] string(";; }")
   Exit: (273) [system] string(";; }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; }", _305338)
^  Unify: (272) [user] mfix_vars1(";; }", _305338)
   Call: (273) [system] compound(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _305338)
^  Unify: (272) [user] mfix_vars1(";; }", _305338)
^  Call: (273) [user] symbol(";; }")
^  Unify: (273) [user] symbol(";; }")
   Call: (274) [system] atom(";; }")
   Fail: (274) [system] atom(";; }")
^  Fail: (273) [user] symbol(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _305338)
   Call: (273) [system] ";; }"=_305338
   Exit: (273) [system] ";; }"=";; }"
^  Exit: (272) [user] mfix_vars1(";; }", ";; }")
   Call: (272) [apply] apply:maplist_([1644, 0], _305340, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1644, 0], [_343336|_343338], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1644, _343336)
^  Unify: (273) [user] mfix_vars1(1644, _343336)
   Call: (274) [system] var(1644)
^  Redo: (273) [user] mfix_vars1(1644, _343336)
^  Unify: (273) [user] mfix_vars1(1644, '$VAR'(_347982))
   Call: (274) [system] atom(1644)
^  Redo: (273) [user] mfix_vars1(1644, _343336)
^  Unify: (273) [user] mfix_vars1(1644, _343336)
   Call: (274) [system] 1644==true
^  Redo: (273) [user] mfix_vars1(1644, _343336)
^  Unify: (273) [user] mfix_vars1(1644, _343336)
   Call: (274) [system] 1644==false
^  Redo: (273) [user] mfix_vars1(1644, _343336)
^  Unify: (273) [user] mfix_vars1(1644, _343336)
   Call: (274) [system] 1644==[_357262, _357268]
^  Redo: (273) [user] mfix_vars1(1644, _343336)
^  Unify: (273) [user] mfix_vars1(1644, _343336)
   Call: (274) [system] is_list(1644)
^  Redo: (273) [user] mfix_vars1(1644, _343336)
^  Unify: (273) [user] mfix_vars1(1644, _343336)
   Call: (274) [system] string(1644)
^  Redo: (273) [user] mfix_vars1(1644, _343336)
^  Unify: (273) [user] mfix_vars1(1644, _343336)
   Call: (274) [system] compound(1644)
^  Redo: (273) [user] mfix_vars1(1644, _343336)
^  Unify: (273) [user] mfix_vars1(1644, _343336)
^  Call: (274) [user] symbol(1644)
^  Unify: (274) [user] symbol(1644)
   Call: (275) [system] atom(1644)
   Fail: (275) [system] atom(1644)
^  Fail: (274) [user] symbol(1644)
^  Redo: (273) [user] mfix_vars1(1644, _343336)
   Call: (274) [system] 1644=_343336
   Exit: (274) [system] 1644=1644
^  Exit: (273) [user] mfix_vars1(1644, 1644)
   Call: (273) [apply] apply:maplist_([0], _343338, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_377662|_377664], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _377662)
^  Unify: (274) [user] mfix_vars1(0, _377662)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _377662)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_382308))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _377662)
^  Unify: (274) [user] mfix_vars1(0, _377662)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _377662)
^  Unify: (274) [user] mfix_vars1(0, _377662)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _377662)
^  Unify: (274) [user] mfix_vars1(0, _377662)
   Call: (275) [system] 0==[_391588, _391594]
^  Redo: (274) [user] mfix_vars1(0, _377662)
^  Unify: (274) [user] mfix_vars1(0, _377662)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _377662)
^  Unify: (274) [user] mfix_vars1(0, _377662)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _377662)
^  Unify: (274) [user] mfix_vars1(0, _377662)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _377662)
^  Unify: (274) [user] mfix_vars1(0, _377662)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _377662)
   Call: (275) [system] 0=_377662
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _377664, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1644, 0], [1644, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; }", 1644, 0], [";; }", 1644, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1644, 0], [";; }", 1644, 0])
   Call: (270) [system] compound_name_arguments(_271836, '$COMMENT', [";; }", 1644, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1644, 0), '$COMMENT', [";; }", 1644, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1644, 0)\=@='$COMMENT'(";; }", 1644, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1644, 0), _266250)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; }", 1644, 0), _427836))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1644, 0), _427836))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1644, 0), _427836))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1644, 0), _427836))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1644, 0), _427836)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1644, 0), _427836)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; }", 1644, 0), _433422))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1644, 0), _433422))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; }", 1644, 0), _433422)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1644, 0), _433422)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; }", 1644, 0), _433422)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1644, 0)\=@='$COMMENT'(";; }", 1644, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1644, 0), _427836)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; }", 1644, 0), _260638))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1644, 0), _260638))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1644, 0), _260638))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1644, 0), _260638))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1644, 0), _260638)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1644, 0), _260638)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; }", 1644, 0), _455742))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1644, 0), _455742))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; }", 1644, 0), _455742)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1644, 0), _455742)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; }", 1644, 0), _455742)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1644, 0)\=@='$COMMENT'(";; }", 1644, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1644, 0), _260638)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0)))
   Call: (261) [system] '$COMMENT'(";; }", 1644, 0)\=@='$COMMENT'(";; }", 1644, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1644, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1644, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1644, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1644, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1644, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; }", 1644, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; }", 1644, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; }", 1644, 0), _484520, [], _484522)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; }", 1644, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1644, 0), _484520, [], _484522)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1644, 0), _484520, [], _484522)
   Call: (258) [system] atom('$COMMENT'(";; }", 1644, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1644, 0), _484520, [], _484522)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1644, 0), _484520, [], _484522)
   Call: (258) [system] compound('$COMMENT'(";; }", 1644, 0))
   Exit: (258) [system] compound('$COMMENT'(";; }", 1644, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1644, 0), _493836, _493838)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1644, 0), '$COMMENT', [";; }", 1644, 0])
^  Call: (258) [user] subst_vars([";; }", 1644, 0], _495722, [], _484522)
^  Unify: (258) [user] subst_vars([";; }", 1644, 0], [";; }", 1644, 0], [], [])
   Call: (259) [system] var([";; }", 1644, 0])
^  Redo: (258) [user] subst_vars([";; }", 1644, 0], _495722, [], _484522)
^  Unify: (258) [user] subst_vars([";; }", 1644, 0], [_499458|_499460], [], _484522)
^  Call: (259) [user] subst_vars(";; }", _499458, [], _500398)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
   Call: (260) [system] var(";; }")
^  Redo: (259) [user] subst_vars(";; }", _499458, [], _500398)
^  Unify: (259) [user] subst_vars(";; }", _499458, [], _500398)
   Call: (260) [system] atom(";; }")
^  Redo: (259) [user] subst_vars(";; }", _499458, [], _500398)
^  Unify: (259) [user] subst_vars(";; }", _499458, [], _500398)
   Call: (260) [system] compound(";; }")
^  Redo: (259) [user] subst_vars(";; }", _499458, [], _500398)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Exit: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Call: (259) [user] subst_vars([1644, 0], _499460, [], _484522)
^  Unify: (259) [user] subst_vars([1644, 0], [1644, 0], [], [])
   Call: (260) [system] var([1644, 0])
^  Redo: (259) [user] subst_vars([1644, 0], _499460, [], _484522)
^  Unify: (259) [user] subst_vars([1644, 0], [_515330|_515332], [], _484522)
^  Call: (260) [user] subst_vars(1644, _515330, [], _516270)
^  Unify: (260) [user] subst_vars(1644, 1644, [], [])
   Call: (261) [system] var(1644)
^  Redo: (260) [user] subst_vars(1644, _515330, [], _516270)
^  Unify: (260) [user] subst_vars(1644, _515330, [], _516270)
   Call: (261) [system] atom(1644)
^  Redo: (260) [user] subst_vars(1644, _515330, [], _516270)
^  Unify: (260) [user] subst_vars(1644, _515330, [], _516270)
   Call: (261) [system] compound(1644)
^  Redo: (260) [user] subst_vars(1644, _5974, [], _5978)
^  Unify: (260) [user] subst_vars(1644, 1644, [], [])
^  Exit: (260) [user] subst_vars(1644, 1644, [], [])
^  Call: (260) [user] subst_vars([0], _5976, [], _5938)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _5976, [], _5938)
^  Unify: (260) [user] subst_vars([0], [_13230|_13232], [], _5938)
^  Call: (261) [user] subst_vars(0, _13230, [], _14170)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _13230, [], _14170)
^  Unify: (261) [user] subst_vars(0, _13230, [], _14170)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _13230, [], _14170)
^  Unify: (261) [user] subst_vars(0, _13230, [], _14170)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _13230, [], _14170)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _13232, [], _5938)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _13232, [], _5938)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1644, 0], [1644, 0], [], [])
^  Exit: (258) [user] subst_vars([";; }", 1644, 0], [";; }", 1644, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5936, '$COMMENT', [";; }", 1644, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1644, 0), '$COMMENT', [";; }", 1644, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; }", 1644, 0), '$COMMENT'(";; }", 1644, 0), [], [])
   Call: (257) [system] _36588=metta_file_buffer(+, '$COMMENT'(";; }", 1644, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; }", 1644, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; }", 1644, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1644, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1644, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1644, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1644, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1644, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1644, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1646, 0, 59098, '$COMMENT'(";; Converted:", 1646, 0), '$stream_position'(59098, 1646, 0, 59132)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1646, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1646, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1646, 0), _89306))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1646, 0), _89306))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1646, 0), _89306)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1646, 0), _89306)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1646, 0), _89306)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1646, 0), _89306)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1646, 0), _94918))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1646, 0), _94918))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1646, 0), _94918))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1646, 0), _94918))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1646, 0), _94918)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1646, 0), _94918)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1646, 0), _100504))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1646, 0), _100504))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1646, 0), _100504)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1646, 0), _100504)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1646, 0), _100504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1646, 0), _100504)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1646, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1646, 0), _100504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1646, 0), '$VAR'(_107964))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1646, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1646, 0), _100504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1646, 0), _100504)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1646, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1646, 0), _100504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1646, 0), _100504)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1646, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1646, 0), _100504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1646, 0), _100504)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1646, 0)==[_117244, _117250]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1646, 0), _100504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1646, 0), _100504)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1646, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1646, 0), _100504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1646, 0), _100504)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1646, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1646, 0), _100504)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1646, 0), _100504)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1646, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1646, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1646, 0), _127446, _127448)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1646, 0), '$COMMENT', [";; Converted:", 1646, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1646, 0], _131188)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1646, 0], _131188)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1646, 0], _131188, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1646, 0], [_134006|_134008], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _134006)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _134006)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _134006)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_138652))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _134006)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _134006)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _134006)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _134006)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _134006)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _134006)
   Call: (273) [system] ";; Converted:"==[_147932, _147938]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _134006)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _134006)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _134006)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _134006)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _134006)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _134006)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _134006)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _134006)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _134006)
   Call: (273) [system] ";; Converted:"=_134006
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1646, 0], _134008, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1646, 0], [_172004|_172006], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1646, _172004)
^  Unify: (273) [user] mfix_vars1(1646, _172004)
   Call: (274) [system] var(1646)
^  Redo: (273) [user] mfix_vars1(1646, _172004)
^  Unify: (273) [user] mfix_vars1(1646, '$VAR'(_176650))
   Call: (274) [system] atom(1646)
^  Redo: (273) [user] mfix_vars1(1646, _172004)
^  Unify: (273) [user] mfix_vars1(1646, _172004)
   Call: (274) [system] 1646==true
^  Redo: (273) [user] mfix_vars1(1646, _172004)
^  Unify: (273) [user] mfix_vars1(1646, _172004)
   Call: (274) [system] 1646==false
^  Redo: (273) [user] mfix_vars1(1646, _172004)
^  Unify: (273) [user] mfix_vars1(1646, _172004)
   Call: (274) [system] 1646==[_185930, _185936]
^  Redo: (273) [user] mfix_vars1(1646, _172004)
^  Unify: (273) [user] mfix_vars1(1646, _172004)
   Call: (274) [system] is_list(1646)
^  Redo: (273) [user] mfix_vars1(1646, _172004)
^  Unify: (273) [user] mfix_vars1(1646, _172004)
   Call: (274) [system] string(1646)
^  Redo: (273) [user] mfix_vars1(1646, _172004)
^  Unify: (273) [user] mfix_vars1(1646, _172004)
   Call: (274) [system] compound(1646)
^  Redo: (273) [user] mfix_vars1(1646, _172004)
^  Unify: (273) [user] mfix_vars1(1646, _172004)
^  Call: (274) [user] symbol(1646)
^  Unify: (274) [user] symbol(1646)
   Call: (275) [system] atom(1646)
   Fail: (275) [system] atom(1646)
^  Fail: (274) [user] symbol(1646)
^  Redo: (273) [user] mfix_vars1(1646, _172004)
   Call: (274) [system] 1646=_172004
   Exit: (274) [system] 1646=1646
^  Exit: (273) [user] mfix_vars1(1646, 1646)
   Call: (273) [apply] apply:maplist_([0], _172006, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_206330|_206332], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _206330)
^  Unify: (274) [user] mfix_vars1(0, _206330)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _206330)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_210976))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _206330)
^  Unify: (274) [user] mfix_vars1(0, _206330)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _206330)
^  Unify: (274) [user] mfix_vars1(0, _206330)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _206330)
^  Unify: (274) [user] mfix_vars1(0, _206330)
   Call: (275) [system] 0==[_220256, _220262]
^  Redo: (274) [user] mfix_vars1(0, _206330)
^  Unify: (274) [user] mfix_vars1(0, _206330)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _206330)
^  Unify: (274) [user] mfix_vars1(0, _206330)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _206330)
^  Unify: (274) [user] mfix_vars1(0, _206330)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _206330)
^  Unify: (274) [user] mfix_vars1(0, _206330)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _206330)
   Call: (275) [system] 0=_206330
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _206332, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1646, 0], [1646, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1646, 0], [";; Converted:", 1646, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1646, 0], [";; Converted:", 1646, 0])
   Call: (270) [system] compound_name_arguments(_100504, '$COMMENT', [";; Converted:", 1646, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1646, 0), '$COMMENT', [";; Converted:", 1646, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1646, 0)\=@='$COMMENT'(";; Converted:", 1646, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1646, 0), _94918)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1646, 0), _256504))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1646, 0), _256504))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1646, 0), _256504))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1646, 0), _256504))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1646, 0), _256504)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1646, 0), _256504)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1646, 0), _262090))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1646, 0), _262090))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1646, 0), _262090)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1646, 0), _262090)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1646, 0), _262090)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1646, 0)\=@='$COMMENT'(";; Converted:", 1646, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1646, 0), _256504)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1646, 0), _89306))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1646, 0), _89306))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1646, 0), _89306))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1646, 0), _89306))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1646, 0), _89306)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1646, 0), _89306)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1646, 0), _284410))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1646, 0), _284410))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1646, 0), _284410)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1646, 0), _284410)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1646, 0), _284410)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1646, 0)\=@='$COMMENT'(";; Converted:", 1646, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1646, 0), _89306)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1646, 0)\=@='$COMMENT'(";; Converted:", 1646, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1646, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1646, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1646, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1646, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1646, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1646, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1646, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1646, 0), _313188, [], _313190)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1646, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1646, 0), _313188, [], _313190)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1646, 0), _313188, [], _313190)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1646, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1646, 0), _313188, [], _313190)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1646, 0), _313188, [], _313190)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1646, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1646, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1646, 0), _322504, _322506)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1646, 0), '$COMMENT', [";; Converted:", 1646, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1646, 0], _324390, [], _313190)
^  Unify: (258) [user] subst_vars([";; Converted:", 1646, 0], [";; Converted:", 1646, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1646, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1646, 0], _324390, [], _313190)
^  Unify: (258) [user] subst_vars([";; Converted:", 1646, 0], [_328126|_328128], [], _313190)
^  Call: (259) [user] subst_vars(";; Converted:", _328126, [], _329066)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _328126, [], _329066)
^  Unify: (259) [user] subst_vars(";; Converted:", _328126, [], _329066)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _328126, [], _329066)
^  Unify: (259) [user] subst_vars(";; Converted:", _328126, [], _329066)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _328126, [], _329066)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1646, 0], _328128, [], _313190)
^  Unify: (259) [user] subst_vars([1646, 0], [1646, 0], [], [])
   Call: (260) [system] var([1646, 0])
^  Redo: (259) [user] subst_vars([1646, 0], _328128, [], _313190)
^  Unify: (259) [user] subst_vars([1646, 0], [_343998|_344000], [], _313190)
^  Call: (260) [user] subst_vars(1646, _343998, [], _344938)
^  Unify: (260) [user] subst_vars(1646, 1646, [], [])
   Call: (261) [system] var(1646)
^  Redo: (260) [user] subst_vars(1646, _343998, [], _344938)
^  Unify: (260) [user] subst_vars(1646, _343998, [], _344938)
   Call: (261) [system] atom(1646)
^  Redo: (260) [user] subst_vars(1646, _343998, [], _344938)
^  Unify: (260) [user] subst_vars(1646, _343998, [], _344938)
   Call: (261) [system] compound(1646)
^  Redo: (260) [user] subst_vars(1646, _343998, [], _344938)
^  Unify: (260) [user] subst_vars(1646, 1646, [], [])
^  Exit: (260) [user] subst_vars(1646, 1646, [], [])
^  Call: (260) [user] subst_vars([0], _344000, [], _313190)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _344000, [], _313190)
^  Unify: (260) [user] subst_vars([0], [_359870|_359872], [], _313190)
^  Call: (261) [user] subst_vars(0, _359870, [], _360810)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _359870, [], _360810)
^  Unify: (261) [user] subst_vars(0, _359870, [], _360810)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _359870, [], _360810)
^  Unify: (261) [user] subst_vars(0, _359870, [], _360810)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _359870, [], _360810)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _359872, [], _313190)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _359872, [], _313190)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1646, 0], [1646, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1646, 0], [";; Converted:", 1646, 0], [], [])
   Call: (258) [system] compound_name_arguments(_313188, '$COMMENT', [";; Converted:", 1646, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1646, 0), '$COMMENT', [";; Converted:", 1646, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1646, 0), '$COMMENT'(";; Converted:", 1646, 0), [], [])
   Call: (257) [system] _383228=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1646, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1646, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1646, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1646, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1646, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1646, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1646, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1646, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1646, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1663, 0, 59686, '$COMMENT'(";; Original:", 1663, 0), '$stream_position'(59686, 1663, 0, 59720)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1663, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1663, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1663, 0), _435946))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1663, 0), _435946))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1663, 0), _435946)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1663, 0), _435946)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1663, 0), _435946)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1663, 0), _435946)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1663, 0), _441558))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1663, 0), _441558))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1663, 0), _441558))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1663, 0), _441558))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1663, 0), _441558)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1663, 0), _441558)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1663, 0), _447144))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1663, 0), _447144))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1663, 0), _447144)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1663, 0), _447144)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1663, 0), _447144)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1663, 0), _447144)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1663, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1663, 0), _447144)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1663, 0), '$VAR'(_454604))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1663, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1663, 0), _447144)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1663, 0), _447144)
   Call: (270) [system] '$COMMENT'(";; Original:", 1663, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1663, 0), _447144)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1663, 0), _447144)
   Call: (270) [system] '$COMMENT'(";; Original:", 1663, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1663, 0), _447144)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1663, 0), _447144)
   Call: (270) [system] '$COMMENT'(";; Original:", 1663, 0)==[_463884, _463890]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1663, 0), _447144)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1663, 0), _447144)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1663, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1663, 0), _447144)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1663, 0), _447144)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1663, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1663, 0), _447144)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1663, 0), _447144)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1663, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1663, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1663, 0), _474086, _474088)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1663, 0), '$COMMENT', [";; Original:", 1663, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1663, 0], _477828)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1663, 0], _477828)
   Call: (271) [apply] apply:maplist_([";; Original:", 1663, 0], _477828, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1663, 0], [_480646|_480648], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _480646)
^  Unify: (272) [user] mfix_vars1(";; Original:", _480646)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _480646)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_485292))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _480646)
^  Unify: (272) [user] mfix_vars1(";; Original:", _480646)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _480646)
^  Unify: (272) [user] mfix_vars1(";; Original:", _480646)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _480646)
^  Unify: (272) [user] mfix_vars1(";; Original:", _480646)
   Call: (273) [system] ";; Original:"==[_494572, _494578]
^  Redo: (272) [user] mfix_vars1(";; Original:", _480646)
^  Unify: (272) [user] mfix_vars1(";; Original:", _480646)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _480646)
^  Unify: (272) [user] mfix_vars1(";; Original:", _480646)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _480646)
^  Unify: (272) [user] mfix_vars1(";; Original:", _480646)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _480646)
^  Unify: (272) [user] mfix_vars1(";; Original:", _480646)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _480646)
   Call: (273) [system] ";; Original:"=_480646
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1663, 0], _480648, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1663, 0], [_518644|_518646], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1663, _518644)
^  Unify: (273) [user] mfix_vars1(1663, _518644)
   Call: (274) [system] var(1663)
^  Redo: (273) [user] mfix_vars1(1663, _518644)
^  Unify: (273) [user] mfix_vars1(1663, '$VAR'(_523290))
   Call: (274) [system] atom(1663)
^  Redo: (273) [user] mfix_vars1(1663, _6030)
^  Unify: (273) [user] mfix_vars1(1663, _6030)
   Call: (274) [system] 1663==true
^  Redo: (273) [user] mfix_vars1(1663, _6030)
^  Unify: (273) [user] mfix_vars1(1663, _6030)
   Call: (274) [system] 1663==false
^  Redo: (273) [user] mfix_vars1(1663, _6030)
^  Unify: (273) [user] mfix_vars1(1663, _6030)
   Call: (274) [system] 1663==[_14390, _14396]
^  Redo: (273) [user] mfix_vars1(1663, _6030)
^  Unify: (273) [user] mfix_vars1(1663, _6030)
   Call: (274) [system] is_list(1663)
^  Redo: (273) [user] mfix_vars1(1663, _6030)
^  Unify: (273) [user] mfix_vars1(1663, _6030)
   Call: (274) [system] string(1663)
^  Redo: (273) [user] mfix_vars1(1663, _6030)
^  Unify: (273) [user] mfix_vars1(1663, _6030)
   Call: (274) [system] compound(1663)
^  Redo: (273) [user] mfix_vars1(1663, _6030)
^  Unify: (273) [user] mfix_vars1(1663, _6030)
^  Call: (274) [user] symbol(1663)
^  Unify: (274) [user] symbol(1663)
   Call: (275) [system] atom(1663)
   Fail: (275) [system] atom(1663)
^  Fail: (274) [user] symbol(1663)
^  Redo: (273) [user] mfix_vars1(1663, _6030)
   Call: (274) [system] 1663=_6030
   Exit: (274) [system] 1663=1663
^  Exit: (273) [user] mfix_vars1(1663, 1663)
   Call: (273) [apply] apply:maplist_([0], _6032, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_34790|_34792], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _34790)
^  Unify: (274) [user] mfix_vars1(0, _34790)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _34790)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_39436))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _34790)
^  Unify: (274) [user] mfix_vars1(0, _34790)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _34790)
^  Unify: (274) [user] mfix_vars1(0, _34790)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _34790)
^  Unify: (274) [user] mfix_vars1(0, _34790)
   Call: (275) [system] 0==[_48716, _48722]
^  Redo: (274) [user] mfix_vars1(0, _34790)
^  Unify: (274) [user] mfix_vars1(0, _34790)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _34790)
^  Unify: (274) [user] mfix_vars1(0, _34790)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _34790)
^  Unify: (274) [user] mfix_vars1(0, _34790)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _34790)
^  Unify: (274) [user] mfix_vars1(0, _34790)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _34790)
   Call: (275) [system] 0=_34790
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _34792, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1663, 0], [1663, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1663, 0], [";; Original:", 1663, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1663, 0], [";; Original:", 1663, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";; Original:", 1663, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1663, 0), '$COMMENT', [";; Original:", 1663, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1663, 0)\=@='$COMMENT'(";; Original:", 1663, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1663, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1663, 0), _84964))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1663, 0), _84964))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1663, 0), _84964))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1663, 0), _84964))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1663, 0), _84964)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1663, 0), _84964)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1663, 0), _90550))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1663, 0), _90550))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1663, 0), _90550)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1663, 0), _90550)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1663, 0), _90550)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1663, 0)\=@='$COMMENT'(";; Original:", 1663, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1663, 0), _84964)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1663, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1663, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1663, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1663, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1663, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1663, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1663, 0), _112870))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1663, 0), _112870))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1663, 0), _112870)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1663, 0), _112870)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1663, 0), _112870)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1663, 0)\=@='$COMMENT'(";; Original:", 1663, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1663, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1663, 0)\=@='$COMMENT'(";; Original:", 1663, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1663, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1663, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1663, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1663, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1663, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1663, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1663, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1663, 0), _141648, [], _141650)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1663, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1663, 0), _141648, [], _141650)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1663, 0), _141648, [], _141650)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1663, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1663, 0), _141648, [], _141650)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1663, 0), _141648, [], _141650)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1663, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1663, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1663, 0), _150964, _150966)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1663, 0), '$COMMENT', [";; Original:", 1663, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1663, 0], _152850, [], _141650)
^  Unify: (258) [user] subst_vars([";; Original:", 1663, 0], [";; Original:", 1663, 0], [], [])
   Call: (259) [system] var([";; Original:", 1663, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1663, 0], _152850, [], _141650)
^  Unify: (258) [user] subst_vars([";; Original:", 1663, 0], [_156586|_156588], [], _141650)
^  Call: (259) [user] subst_vars(";; Original:", _156586, [], _157526)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _156586, [], _157526)
^  Unify: (259) [user] subst_vars(";; Original:", _156586, [], _157526)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _156586, [], _157526)
^  Unify: (259) [user] subst_vars(";; Original:", _156586, [], _157526)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _156586, [], _157526)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1663, 0], _156588, [], _141650)
^  Unify: (259) [user] subst_vars([1663, 0], [1663, 0], [], [])
   Call: (260) [system] var([1663, 0])
^  Redo: (259) [user] subst_vars([1663, 0], _156588, [], _141650)
^  Unify: (259) [user] subst_vars([1663, 0], [_172458|_172460], [], _141650)
^  Call: (260) [user] subst_vars(1663, _172458, [], _173398)
^  Unify: (260) [user] subst_vars(1663, 1663, [], [])
   Call: (261) [system] var(1663)
^  Redo: (260) [user] subst_vars(1663, _172458, [], _173398)
^  Unify: (260) [user] subst_vars(1663, _172458, [], _173398)
   Call: (261) [system] atom(1663)
^  Redo: (260) [user] subst_vars(1663, _172458, [], _173398)
^  Unify: (260) [user] subst_vars(1663, _172458, [], _173398)
   Call: (261) [system] compound(1663)
^  Redo: (260) [user] subst_vars(1663, _172458, [], _173398)
^  Unify: (260) [user] subst_vars(1663, 1663, [], [])
^  Exit: (260) [user] subst_vars(1663, 1663, [], [])
^  Call: (260) [user] subst_vars([0], _172460, [], _141650)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _172460, [], _141650)
^  Unify: (260) [user] subst_vars([0], [_188330|_188332], [], _141650)
^  Call: (261) [user] subst_vars(0, _188330, [], _189270)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _188330, [], _189270)
^  Unify: (261) [user] subst_vars(0, _188330, [], _189270)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _188330, [], _189270)
^  Unify: (261) [user] subst_vars(0, _188330, [], _189270)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _188330, [], _189270)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _188332, [], _141650)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _188332, [], _141650)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1663, 0], [1663, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1663, 0], [";; Original:", 1663, 0], [], [])
   Call: (258) [system] compound_name_arguments(_141648, '$COMMENT', [";; Original:", 1663, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1663, 0), '$COMMENT', [";; Original:", 1663, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1663, 0), '$COMMENT'(";; Original:", 1663, 0), [], [])
   Call: (257) [system] _211688=metta_file_buffer(+, '$COMMENT'(";; Original:", 1663, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1663, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1663, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1663, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1663, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1663, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1663, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1663, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1663, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1664, 0, 59699, '$COMMENT'(";; #[test]", 1664, 0), '$stream_position'(59699, 1664, 0, 59733)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1664, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1664, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; #[test]", 1664, 0), _264406))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 1664, 0), _264406))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; #[test]", 1664, 0), _264406)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 1664, 0), _264406)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1664, 0), _264406)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1664, 0), _264406)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; #[test]", 1664, 0), _270018))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1664, 0), _270018))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1664, 0), _270018))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1664, 0), _270018))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1664, 0), _270018)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1664, 0), _270018)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; #[test]", 1664, 0), _275604))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 1664, 0), _275604))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; #[test]", 1664, 0), _275604)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 1664, 0), _275604)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1664, 0), _275604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1664, 0), _275604)
   Call: (270) [system] var('$COMMENT'(";; #[test]", 1664, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1664, 0), _275604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1664, 0), '$VAR'(_283064))
   Call: (270) [system] atom('$COMMENT'(";; #[test]", 1664, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1664, 0), _275604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1664, 0), _275604)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1664, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1664, 0), _275604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1664, 0), _275604)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1664, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1664, 0), _275604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1664, 0), _275604)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1664, 0)==[_292344, _292350]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1664, 0), _275604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1664, 0), _275604)
   Call: (270) [system] is_list('$COMMENT'(";; #[test]", 1664, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1664, 0), _275604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1664, 0), _275604)
   Call: (270) [system] string('$COMMENT'(";; #[test]", 1664, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1664, 0), _275604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1664, 0), _275604)
   Call: (270) [system] compound('$COMMENT'(";; #[test]", 1664, 0))
   Exit: (270) [system] compound('$COMMENT'(";; #[test]", 1664, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1664, 0), _302546, _302548)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1664, 0), '$COMMENT', [";; #[test]", 1664, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; #[test]", 1664, 0], _306288)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 1664, 0], _306288)
   Call: (271) [apply] apply:maplist_([";; #[test]", 1664, 0], _306288, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; #[test]", 1664, 0], [_309106|_309108], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; #[test]", _309106)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _309106)
   Call: (273) [system] var(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _309106)
^  Unify: (272) [user] mfix_vars1(";; #[test]", '$VAR'(_313752))
   Call: (273) [system] atom(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _309106)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _309106)
   Call: (273) [system] ";; #[test]"==true
^  Redo: (272) [user] mfix_vars1(";; #[test]", _309106)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _309106)
   Call: (273) [system] ";; #[test]"==false
^  Redo: (272) [user] mfix_vars1(";; #[test]", _309106)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _309106)
   Call: (273) [system] ";; #[test]"==[_323032, _323038]
^  Redo: (272) [user] mfix_vars1(";; #[test]", _309106)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _309106)
   Call: (273) [system] is_list(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _309106)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _309106)
   Call: (273) [system] string(";; #[test]")
   Exit: (273) [system] string(";; #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; #[test]", _309106)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _309106)
   Call: (273) [system] compound(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _309106)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _309106)
^  Call: (273) [user] symbol(";; #[test]")
^  Unify: (273) [user] symbol(";; #[test]")
   Call: (274) [system] atom(";; #[test]")
   Fail: (274) [system] atom(";; #[test]")
^  Fail: (273) [user] symbol(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _309106)
   Call: (273) [system] ";; #[test]"=_309106
   Exit: (273) [system] ";; #[test]"=";; #[test]"
^  Exit: (272) [user] mfix_vars1(";; #[test]", ";; #[test]")
   Call: (272) [apply] apply:maplist_([1664, 0], _309108, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1664, 0], [_347104|_347106], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1664, _347104)
^  Unify: (273) [user] mfix_vars1(1664, _347104)
   Call: (274) [system] var(1664)
^  Redo: (273) [user] mfix_vars1(1664, _347104)
^  Unify: (273) [user] mfix_vars1(1664, '$VAR'(_351750))
   Call: (274) [system] atom(1664)
^  Redo: (273) [user] mfix_vars1(1664, _347104)
^  Unify: (273) [user] mfix_vars1(1664, _347104)
   Call: (274) [system] 1664==true
^  Redo: (273) [user] mfix_vars1(1664, _347104)
^  Unify: (273) [user] mfix_vars1(1664, _347104)
   Call: (274) [system] 1664==false
^  Redo: (273) [user] mfix_vars1(1664, _347104)
^  Unify: (273) [user] mfix_vars1(1664, _347104)
   Call: (274) [system] 1664==[_361030, _361036]
^  Redo: (273) [user] mfix_vars1(1664, _347104)
^  Unify: (273) [user] mfix_vars1(1664, _347104)
   Call: (274) [system] is_list(1664)
^  Redo: (273) [user] mfix_vars1(1664, _347104)
^  Unify: (273) [user] mfix_vars1(1664, _347104)
   Call: (274) [system] string(1664)
^  Redo: (273) [user] mfix_vars1(1664, _347104)
^  Unify: (273) [user] mfix_vars1(1664, _347104)
   Call: (274) [system] compound(1664)
^  Redo: (273) [user] mfix_vars1(1664, _347104)
^  Unify: (273) [user] mfix_vars1(1664, _347104)
^  Call: (274) [user] symbol(1664)
^  Unify: (274) [user] symbol(1664)
   Call: (275) [system] atom(1664)
   Fail: (275) [system] atom(1664)
^  Fail: (274) [user] symbol(1664)
^  Redo: (273) [user] mfix_vars1(1664, _347104)
   Call: (274) [system] 1664=_347104
   Exit: (274) [system] 1664=1664
^  Exit: (273) [user] mfix_vars1(1664, 1664)
   Call: (273) [apply] apply:maplist_([0], _347106, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_381430|_381432], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _381430)
^  Unify: (274) [user] mfix_vars1(0, _381430)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _381430)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_386076))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _381430)
^  Unify: (274) [user] mfix_vars1(0, _381430)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _381430)
^  Unify: (274) [user] mfix_vars1(0, _381430)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _381430)
^  Unify: (274) [user] mfix_vars1(0, _381430)
   Call: (275) [system] 0==[_395356, _395362]
^  Redo: (274) [user] mfix_vars1(0, _381430)
^  Unify: (274) [user] mfix_vars1(0, _381430)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _381430)
^  Unify: (274) [user] mfix_vars1(0, _381430)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _381430)
^  Unify: (274) [user] mfix_vars1(0, _381430)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _381430)
^  Unify: (274) [user] mfix_vars1(0, _381430)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _381430)
   Call: (275) [system] 0=_381430
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _381432, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1664, 0], [1664, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; #[test]", 1664, 0], [";; #[test]", 1664, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 1664, 0], [";; #[test]", 1664, 0])
   Call: (270) [system] compound_name_arguments(_275604, '$COMMENT', [";; #[test]", 1664, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1664, 0), '$COMMENT', [";; #[test]", 1664, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1664, 0)\=@='$COMMENT'(";; #[test]", 1664, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1664, 0), _270018)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; #[test]", 1664, 0), _431604))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1664, 0), _431604))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1664, 0), _431604))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1664, 0), _431604))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1664, 0), _431604)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1664, 0), _431604)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; #[test]", 1664, 0), _437190))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 1664, 0), _437190))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; #[test]", 1664, 0), _437190)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 1664, 0), _437190)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1664, 0), _437190)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1664, 0)\=@='$COMMENT'(";; #[test]", 1664, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1664, 0), _431604)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; #[test]", 1664, 0), _264406))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1664, 0), _264406))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1664, 0), _264406))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1664, 0), _264406))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1664, 0), _264406)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1664, 0), _264406)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; #[test]", 1664, 0), _459510))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 1664, 0), _459510))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; #[test]", 1664, 0), _459510)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 1664, 0), _459510)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1664, 0), _459510)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1664, 0)\=@='$COMMENT'(";; #[test]", 1664, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1664, 0), _264406)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0)))
   Call: (261) [system] '$COMMENT'(";; #[test]", 1664, 0)\=@='$COMMENT'(";; #[test]", 1664, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1664, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1664, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1664, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1664, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1664, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1664, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1664, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1664, 0), _488288, [], _488290)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; #[test]", 1664, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1664, 0), _488288, [], _488290)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1664, 0), _488288, [], _488290)
   Call: (258) [system] atom('$COMMENT'(";; #[test]", 1664, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1664, 0), _488288, [], _488290)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1664, 0), _488288, [], _488290)
   Call: (258) [system] compound('$COMMENT'(";; #[test]", 1664, 0))
   Exit: (258) [system] compound('$COMMENT'(";; #[test]", 1664, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1664, 0), _497604, _497606)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1664, 0), '$COMMENT', [";; #[test]", 1664, 0])
^  Call: (258) [user] subst_vars([";; #[test]", 1664, 0], _499490, [], _488290)
^  Unify: (258) [user] subst_vars([";; #[test]", 1664, 0], [";; #[test]", 1664, 0], [], [])
   Call: (259) [system] var([";; #[test]", 1664, 0])
^  Redo: (258) [user] subst_vars([";; #[test]", 1664, 0], _499490, [], _488290)
^  Unify: (258) [user] subst_vars([";; #[test]", 1664, 0], [_503226|_503228], [], _488290)
^  Call: (259) [user] subst_vars(";; #[test]", _503226, [], _504166)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
   Call: (260) [system] var(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _503226, [], _504166)
^  Unify: (259) [user] subst_vars(";; #[test]", _503226, [], _504166)
   Call: (260) [system] atom(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _503226, [], _504166)
^  Unify: (259) [user] subst_vars(";; #[test]", _503226, [], _504166)
   Call: (260) [system] compound(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _503226, [], _504166)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Exit: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Call: (259) [user] subst_vars([1664, 0], _503228, [], _488290)
^  Unify: (259) [user] subst_vars([1664, 0], [1664, 0], [], [])
   Call: (260) [system] var([1664, 0])
^  Redo: (259) [user] subst_vars([1664, 0], _503228, [], _488290)
^  Unify: (259) [user] subst_vars([1664, 0], [_519098|_519100], [], _488290)
^  Call: (260) [user] subst_vars(1664, _519098, [], _520038)
^  Unify: (260) [user] subst_vars(1664, 1664, [], [])
   Call: (261) [system] var(1664)
^  Redo: (260) [user] subst_vars(1664, _519098, [], _520038)
^  Unify: (260) [user] subst_vars(1664, _5976, [], _5980)
   Call: (261) [system] atom(1664)
^  Redo: (260) [user] subst_vars(1664, _5976, [], _5980)
^  Unify: (260) [user] subst_vars(1664, _5976, [], _5980)
   Call: (261) [system] compound(1664)
^  Redo: (260) [user] subst_vars(1664, _5976, [], _5980)
^  Unify: (260) [user] subst_vars(1664, 1664, [], [])
^  Exit: (260) [user] subst_vars(1664, 1664, [], [])
^  Call: (260) [user] subst_vars([0], _5978, [], _5940)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _5978, [], _5940)
^  Unify: (260) [user] subst_vars([0], [_16996|_16998], [], _5940)
^  Call: (261) [user] subst_vars(0, _16996, [], _17936)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _16996, [], _17936)
^  Unify: (261) [user] subst_vars(0, _16996, [], _17936)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _16996, [], _17936)
^  Unify: (261) [user] subst_vars(0, _16996, [], _17936)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _16996, [], _17936)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _16998, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _16998, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1664, 0], [1664, 0], [], [])
^  Exit: (258) [user] subst_vars([";; #[test]", 1664, 0], [";; #[test]", 1664, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5938, '$COMMENT', [";; #[test]", 1664, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1664, 0), '$COMMENT', [";; #[test]", 1664, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1664, 0), '$COMMENT'(";; #[test]", 1664, 0), [], [])
   Call: (257) [system] _40354=metta_file_buffer(+, '$COMMENT'(";; #[test]", 1664, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; #[test]", 1664, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; #[test]", 1664, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 1664, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 1664, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1664, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1664, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1664, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1664, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1665, 0, 59710, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$stream_position'(59710, 1665, 0, 59744)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _93076))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _93076))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _93076)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _93076)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _93076)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _93076)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _98688))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _98688))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _98688))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _98688))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _98688)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _98688)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _104274))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _104274))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _104274)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _104274)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _104274)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _104274)
   Call: (270) [system] var('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _104274)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$VAR'(_111734))
   Call: (270) [system] atom('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _104274)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _104274)
   Call: (270) [system] '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _104274)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _104274)
   Call: (270) [system] '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _104274)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _104274)
   Call: (270) [system] '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0)==[_121014, _121020]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _104274)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _104274)
   Call: (270) [system] is_list('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _104274)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _104274)
   Call: (270) [system] string('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _104274)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _104274)
   Call: (270) [system] compound('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
   Exit: (270) [system] compound('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _131216, _131218)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT', [";; fn test_get_doc_no_doc() {", 1665, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; fn test_get_doc_no_doc() {", 1665, 0], _134958)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn test_get_doc_no_doc() {", 1665, 0], _134958)
   Call: (271) [apply] apply:maplist_([";; fn test_get_doc_no_doc() {", 1665, 0], _134958, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; fn test_get_doc_no_doc() {", 1665, 0], [_137776|_137778], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; fn test_get_doc_no_doc() {", _137776)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_no_doc() {", _137776)
   Call: (273) [system] var(";; fn test_get_doc_no_doc() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_no_doc() {", _137776)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_no_doc() {", '$VAR'(_142422))
   Call: (273) [system] atom(";; fn test_get_doc_no_doc() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_no_doc() {", _137776)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_no_doc() {", _137776)
   Call: (273) [system] ";; fn test_get_doc_no_doc() {"==true
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_no_doc() {", _137776)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_no_doc() {", _137776)
   Call: (273) [system] ";; fn test_get_doc_no_doc() {"==false
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_no_doc() {", _137776)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_no_doc() {", _137776)
   Call: (273) [system] ";; fn test_get_doc_no_doc() {"==[_151702, _151708]
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_no_doc() {", _137776)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_no_doc() {", _137776)
   Call: (273) [system] is_list(";; fn test_get_doc_no_doc() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_no_doc() {", _137776)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_no_doc() {", _137776)
   Call: (273) [system] string(";; fn test_get_doc_no_doc() {")
   Exit: (273) [system] string(";; fn test_get_doc_no_doc() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_no_doc() {", _137776)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_no_doc() {", _137776)
   Call: (273) [system] compound(";; fn test_get_doc_no_doc() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_no_doc() {", _137776)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_no_doc() {", _137776)
^  Call: (273) [user] symbol(";; fn test_get_doc_no_doc() {")
^  Unify: (273) [user] symbol(";; fn test_get_doc_no_doc() {")
   Call: (274) [system] atom(";; fn test_get_doc_no_doc() {")
   Fail: (274) [system] atom(";; fn test_get_doc_no_doc() {")
^  Fail: (273) [user] symbol(";; fn test_get_doc_no_doc() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_no_doc() {", _137776)
   Call: (273) [system] ";; fn test_get_doc_no_doc() {"=_137776
   Exit: (273) [system] ";; fn test_get_doc_no_doc() {"=";; fn test_get_doc_no_doc() {"
^  Exit: (272) [user] mfix_vars1(";; fn test_get_doc_no_doc() {", ";; fn test_get_doc_no_doc() {")
   Call: (272) [apply] apply:maplist_([1665, 0], _137778, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1665, 0], [_175774|_175776], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1665, _175774)
^  Unify: (273) [user] mfix_vars1(1665, _175774)
   Call: (274) [system] var(1665)
^  Redo: (273) [user] mfix_vars1(1665, _175774)
^  Unify: (273) [user] mfix_vars1(1665, '$VAR'(_180420))
   Call: (274) [system] atom(1665)
^  Redo: (273) [user] mfix_vars1(1665, _175774)
^  Unify: (273) [user] mfix_vars1(1665, _175774)
   Call: (274) [system] 1665==true
^  Redo: (273) [user] mfix_vars1(1665, _175774)
^  Unify: (273) [user] mfix_vars1(1665, _175774)
   Call: (274) [system] 1665==false
^  Redo: (273) [user] mfix_vars1(1665, _175774)
^  Unify: (273) [user] mfix_vars1(1665, _175774)
   Call: (274) [system] 1665==[_189700, _189706]
^  Redo: (273) [user] mfix_vars1(1665, _175774)
^  Unify: (273) [user] mfix_vars1(1665, _175774)
   Call: (274) [system] is_list(1665)
^  Redo: (273) [user] mfix_vars1(1665, _175774)
^  Unify: (273) [user] mfix_vars1(1665, _175774)
   Call: (274) [system] string(1665)
^  Redo: (273) [user] mfix_vars1(1665, _175774)
^  Unify: (273) [user] mfix_vars1(1665, _175774)
   Call: (274) [system] compound(1665)
^  Redo: (273) [user] mfix_vars1(1665, _175774)
^  Unify: (273) [user] mfix_vars1(1665, _175774)
^  Call: (274) [user] symbol(1665)
^  Unify: (274) [user] symbol(1665)
   Call: (275) [system] atom(1665)
   Fail: (275) [system] atom(1665)
^  Fail: (274) [user] symbol(1665)
^  Redo: (273) [user] mfix_vars1(1665, _175774)
   Call: (274) [system] 1665=_175774
   Exit: (274) [system] 1665=1665
^  Exit: (273) [user] mfix_vars1(1665, 1665)
   Call: (273) [apply] apply:maplist_([0], _175776, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_210100|_210102], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _210100)
^  Unify: (274) [user] mfix_vars1(0, _210100)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _210100)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_214746))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _210100)
^  Unify: (274) [user] mfix_vars1(0, _210100)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _210100)
^  Unify: (274) [user] mfix_vars1(0, _210100)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _210100)
^  Unify: (274) [user] mfix_vars1(0, _210100)
   Call: (275) [system] 0==[_224026, _224032]
^  Redo: (274) [user] mfix_vars1(0, _210100)
^  Unify: (274) [user] mfix_vars1(0, _210100)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _210100)
^  Unify: (274) [user] mfix_vars1(0, _210100)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _210100)
^  Unify: (274) [user] mfix_vars1(0, _210100)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _210100)
^  Unify: (274) [user] mfix_vars1(0, _210100)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _210100)
   Call: (275) [system] 0=_210100
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _210102, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1665, 0], [1665, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; fn test_get_doc_no_doc() {", 1665, 0], [";; fn test_get_doc_no_doc() {", 1665, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn test_get_doc_no_doc() {", 1665, 0], [";; fn test_get_doc_no_doc() {", 1665, 0])
   Call: (270) [system] compound_name_arguments(_104274, '$COMMENT', [";; fn test_get_doc_no_doc() {", 1665, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT', [";; fn test_get_doc_no_doc() {", 1665, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0)\=@='$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _98688)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _260274))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _260274))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _260274))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _260274))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _260274)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _260274)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _265860))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _265860))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _265860)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _265860)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _265860)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0)\=@='$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _260274)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _93076))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _93076))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _93076))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _93076))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _93076)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _93076)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _288180))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _288180))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _288180)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _288180)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _288180)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0)\=@='$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _93076)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0)))
   Call: (261) [system] '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0)\=@='$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _316958, [], _316960)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _316958, [], _316960)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _316958, [], _316960)
   Call: (258) [system] atom('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _316958, [], _316960)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _316958, [], _316960)
   Call: (258) [system] compound('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
   Exit: (258) [system] compound('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), _326274, _326276)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT', [";; fn test_get_doc_no_doc() {", 1665, 0])
^  Call: (258) [user] subst_vars([";; fn test_get_doc_no_doc() {", 1665, 0], _328160, [], _316960)
^  Unify: (258) [user] subst_vars([";; fn test_get_doc_no_doc() {", 1665, 0], [";; fn test_get_doc_no_doc() {", 1665, 0], [], [])
   Call: (259) [system] var([";; fn test_get_doc_no_doc() {", 1665, 0])
^  Redo: (258) [user] subst_vars([";; fn test_get_doc_no_doc() {", 1665, 0], _328160, [], _316960)
^  Unify: (258) [user] subst_vars([";; fn test_get_doc_no_doc() {", 1665, 0], [_331896|_331898], [], _316960)
^  Call: (259) [user] subst_vars(";; fn test_get_doc_no_doc() {", _331896, [], _332836)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_no_doc() {", ";; fn test_get_doc_no_doc() {", [], [])
   Call: (260) [system] var(";; fn test_get_doc_no_doc() {")
^  Redo: (259) [user] subst_vars(";; fn test_get_doc_no_doc() {", _331896, [], _332836)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_no_doc() {", _331896, [], _332836)
   Call: (260) [system] atom(";; fn test_get_doc_no_doc() {")
^  Redo: (259) [user] subst_vars(";; fn test_get_doc_no_doc() {", _331896, [], _332836)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_no_doc() {", _331896, [], _332836)
   Call: (260) [system] compound(";; fn test_get_doc_no_doc() {")
^  Redo: (259) [user] subst_vars(";; fn test_get_doc_no_doc() {", _331896, [], _332836)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_no_doc() {", ";; fn test_get_doc_no_doc() {", [], [])
^  Exit: (259) [user] subst_vars(";; fn test_get_doc_no_doc() {", ";; fn test_get_doc_no_doc() {", [], [])
^  Call: (259) [user] subst_vars([1665, 0], _331898, [], _316960)
^  Unify: (259) [user] subst_vars([1665, 0], [1665, 0], [], [])
   Call: (260) [system] var([1665, 0])
^  Redo: (259) [user] subst_vars([1665, 0], _331898, [], _316960)
^  Unify: (259) [user] subst_vars([1665, 0], [_347768|_347770], [], _316960)
^  Call: (260) [user] subst_vars(1665, _347768, [], _348708)
^  Unify: (260) [user] subst_vars(1665, 1665, [], [])
   Call: (261) [system] var(1665)
^  Redo: (260) [user] subst_vars(1665, _347768, [], _348708)
^  Unify: (260) [user] subst_vars(1665, _347768, [], _348708)
   Call: (261) [system] atom(1665)
^  Redo: (260) [user] subst_vars(1665, _347768, [], _348708)
^  Unify: (260) [user] subst_vars(1665, _347768, [], _348708)
   Call: (261) [system] compound(1665)
^  Redo: (260) [user] subst_vars(1665, _347768, [], _348708)
^  Unify: (260) [user] subst_vars(1665, 1665, [], [])
^  Exit: (260) [user] subst_vars(1665, 1665, [], [])
^  Call: (260) [user] subst_vars([0], _347770, [], _316960)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _347770, [], _316960)
^  Unify: (260) [user] subst_vars([0], [_363640|_363642], [], _316960)
^  Call: (261) [user] subst_vars(0, _363640, [], _364580)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _363640, [], _364580)
^  Unify: (261) [user] subst_vars(0, _363640, [], _364580)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _363640, [], _364580)
^  Unify: (261) [user] subst_vars(0, _363640, [], _364580)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _363640, [], _364580)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _363642, [], _316960)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _363642, [], _316960)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1665, 0], [1665, 0], [], [])
^  Exit: (258) [user] subst_vars([";; fn test_get_doc_no_doc() {", 1665, 0], [";; fn test_get_doc_no_doc() {", 1665, 0], [], [])
   Call: (258) [system] compound_name_arguments(_316958, '$COMMENT', [";; fn test_get_doc_no_doc() {", 1665, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT', [";; fn test_get_doc_no_doc() {", 1665, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), [], [])
   Call: (257) [system] _386998=metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_no_doc() {", 1665, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1666, 0, 59740, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$stream_position'(59740, 1666, 0, 59774)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _439728))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _439728))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _439728)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _439728)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _439728)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _439728)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _445340))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _445340))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _445340))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _445340))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _445340)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _445340)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _450926))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _450926))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _450926)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _450926)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _450926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _450926)
   Call: (270) [system] var('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _450926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$VAR'(_458386))
   Call: (270) [system] atom('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _450926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _450926)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _450926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _450926)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _450926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _450926)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0)==[_467666, _467672]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _450926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _450926)
   Call: (270) [system] is_list('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _450926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _450926)
   Call: (270) [system] string('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _450926)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _450926)
   Call: (270) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _477868, _477870)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0], _481610)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0], _481610)
   Call: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0], _481610, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0], [_484428|_484430], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _484428)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _484428)
   Call: (273) [system] var(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _484428)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", '$VAR'(_489074))
   Call: (273) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _484428)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _484428)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==true
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _484428)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _484428)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==false
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _484428)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _484428)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==[_498354, _498360]
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _484428)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _484428)
   Call: (273) [system] is_list(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _484428)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _484428)
   Call: (273) [system] string(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Exit: (273) [system] string(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _484428)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _484428)
   Call: (273) [system] compound(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _484428)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _484428)
^  Call: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Unify: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (274) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Fail: (274) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Fail: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _484428)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"=_484428
   Exit: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"=";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"
^  Exit: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (272) [apply] apply:maplist_([1666, 0], _484430, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1666, 0], [_522426|_522428], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1666, _6042)
^  Unify: (273) [user] mfix_vars1(1666, _6042)
   Call: (274) [system] var(1666)
^  Redo: (273) [user] mfix_vars1(1666, _6042)
^  Unify: (273) [user] mfix_vars1(1666, '$VAR'(_9182))
   Call: (274) [system] atom(1666)
^  Redo: (273) [user] mfix_vars1(1666, _6042)
^  Unify: (273) [user] mfix_vars1(1666, _6042)
   Call: (274) [system] 1666==true
^  Redo: (273) [user] mfix_vars1(1666, _6042)
^  Unify: (273) [user] mfix_vars1(1666, _6042)
   Call: (274) [system] 1666==false
^  Redo: (273) [user] mfix_vars1(1666, _6042)
^  Unify: (273) [user] mfix_vars1(1666, _6042)
   Call: (274) [system] 1666==[_18462, _18468]
^  Redo: (273) [user] mfix_vars1(1666, _6042)
^  Unify: (273) [user] mfix_vars1(1666, _6042)
   Call: (274) [system] is_list(1666)
^  Redo: (273) [user] mfix_vars1(1666, _6042)
^  Unify: (273) [user] mfix_vars1(1666, _6042)
   Call: (274) [system] string(1666)
^  Redo: (273) [user] mfix_vars1(1666, _6042)
^  Unify: (273) [user] mfix_vars1(1666, _6042)
   Call: (274) [system] compound(1666)
^  Redo: (273) [user] mfix_vars1(1666, _6042)
^  Unify: (273) [user] mfix_vars1(1666, _6042)
^  Call: (274) [user] symbol(1666)
^  Unify: (274) [user] symbol(1666)
   Call: (275) [system] atom(1666)
   Fail: (275) [system] atom(1666)
^  Fail: (274) [user] symbol(1666)
^  Redo: (273) [user] mfix_vars1(1666, _6042)
   Call: (274) [system] 1666=_6042
   Exit: (274) [system] 1666=1666
^  Exit: (273) [user] mfix_vars1(1666, 1666)
   Call: (273) [apply] apply:maplist_([0], _6044, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_38862|_38864], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _38862)
^  Unify: (274) [user] mfix_vars1(0, _38862)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _38862)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_43508))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _38862)
^  Unify: (274) [user] mfix_vars1(0, _38862)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _38862)
^  Unify: (274) [user] mfix_vars1(0, _38862)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _38862)
^  Unify: (274) [user] mfix_vars1(0, _38862)
   Call: (275) [system] 0==[_52788, _52794]
^  Redo: (274) [user] mfix_vars1(0, _38862)
^  Unify: (274) [user] mfix_vars1(0, _38862)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _38862)
^  Unify: (274) [user] mfix_vars1(0, _38862)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _38862)
^  Unify: (274) [user] mfix_vars1(0, _38862)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _38862)
^  Unify: (274) [user] mfix_vars1(0, _38862)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _38862)
   Call: (275) [system] 0=_38862
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _38864, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1666, 0], [1666, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0])
   Call: (270) [system] compound_name_arguments(_5990, '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _5976)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _89036))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _89036))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _89036))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _89036))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _89036)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _89036)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _94622))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _94622))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _94622)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _94622)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _94622)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _89036)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _5956))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _5956))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _5956))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _5956))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _5956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _5956)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _116942))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _116942))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _116942)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _116942)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _116942)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _5956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0)))
   Call: (261) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _145720, [], _145722)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _145720, [], _145722)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _145720, [], _145722)
   Call: (258) [system] atom('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _145720, [], _145722)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _145720, [], _145722)
   Call: (258) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), _155036, _155038)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0])
^  Call: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0], _156922, [], _145722)
^  Unify: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0], [], [])
   Call: (259) [system] var([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0])
^  Redo: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0], _156922, [], _145722)
^  Unify: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0], [_160658|_160660], [], _145722)
^  Call: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _160658, [], _161598)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
   Call: (260) [system] var(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _160658, [], _161598)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _160658, [], _161598)
   Call: (260) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _160658, [], _161598)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _160658, [], _161598)
   Call: (260) [system] compound(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _160658, [], _161598)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Exit: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Call: (259) [user] subst_vars([1666, 0], _160660, [], _145722)
^  Unify: (259) [user] subst_vars([1666, 0], [1666, 0], [], [])
   Call: (260) [system] var([1666, 0])
^  Redo: (259) [user] subst_vars([1666, 0], _160660, [], _145722)
^  Unify: (259) [user] subst_vars([1666, 0], [_176530|_176532], [], _145722)
^  Call: (260) [user] subst_vars(1666, _176530, [], _177470)
^  Unify: (260) [user] subst_vars(1666, 1666, [], [])
   Call: (261) [system] var(1666)
^  Redo: (260) [user] subst_vars(1666, _176530, [], _177470)
^  Unify: (260) [user] subst_vars(1666, _176530, [], _177470)
   Call: (261) [system] atom(1666)
^  Redo: (260) [user] subst_vars(1666, _176530, [], _177470)
^  Unify: (260) [user] subst_vars(1666, _176530, [], _177470)
   Call: (261) [system] compound(1666)
^  Redo: (260) [user] subst_vars(1666, _176530, [], _177470)
^  Unify: (260) [user] subst_vars(1666, 1666, [], [])
^  Exit: (260) [user] subst_vars(1666, 1666, [], [])
^  Call: (260) [user] subst_vars([0], _176532, [], _145722)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _176532, [], _145722)
^  Unify: (260) [user] subst_vars([0], [_192402|_192404], [], _145722)
^  Call: (261) [user] subst_vars(0, _192402, [], _193342)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _192402, [], _193342)
^  Unify: (261) [user] subst_vars(0, _192402, [], _193342)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _192402, [], _193342)
^  Unify: (261) [user] subst_vars(0, _192402, [], _193342)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _192402, [], _193342)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _192404, [], _145722)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _192404, [], _145722)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1666, 0], [1666, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0], [], [])
   Call: (258) [system] compound_name_arguments(_145720, '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), [], [])
   Call: (257) [system] _215760=metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1666, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1667, 0, 59801, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$stream_position'(59801, 1667, 0, 59835)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _268486))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _268486))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _268486)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _268486)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _268486)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _268486)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _274098))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _274098))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _274098))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _274098))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _274098)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _274098)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _279684))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _279684))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _279684)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _279684)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _279684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _279684)
   Call: (270) [system] var('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _279684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$VAR'(_287144))
   Call: (270) [system] atom('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _279684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _279684)
   Call: (270) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _279684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _279684)
   Call: (270) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _279684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _279684)
   Call: (270) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0)==[_296424, _296430]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _279684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _279684)
   Call: (270) [system] is_list('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _279684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _279684)
   Call: (270) [system] string('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _279684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _279684)
   Call: (270) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _306626, _306628)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1667, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     let parser = SExprParser::new(r#\"", 1667, 0], _310368)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let parser = SExprParser::new(r#\"", 1667, 0], _310368)
   Call: (271) [apply] apply:maplist_([";;     let parser = SExprParser::new(r#\"", 1667, 0], _310368, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     let parser = SExprParser::new(r#\"", 1667, 0], [_313186|_313188], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _313186)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _313186)
   Call: (273) [system] var(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _313186)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", '$VAR'(_317832))
   Call: (273) [system] atom(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _313186)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _313186)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""==true
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _313186)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _313186)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""==false
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _313186)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _313186)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""==[_327112, _327118]
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _313186)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _313186)
   Call: (273) [system] is_list(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _313186)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _313186)
   Call: (273) [system] string(";;     let parser = SExprParser::new(r#\"")
   Exit: (273) [system] string(";;     let parser = SExprParser::new(r#\"")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _313186)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _313186)
   Call: (273) [system] compound(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _313186)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _313186)
^  Call: (273) [user] symbol(";;     let parser = SExprParser::new(r#\"")
^  Unify: (273) [user] symbol(";;     let parser = SExprParser::new(r#\"")
   Call: (274) [system] atom(";;     let parser = SExprParser::new(r#\"")
   Fail: (274) [system] atom(";;     let parser = SExprParser::new(r#\"")
^  Fail: (273) [user] symbol(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _313186)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""=_313186
   Exit: (273) [system] ";;     let parser = SExprParser::new(r#\""=";;     let parser = SExprParser::new(r#\""
^  Exit: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"")
   Call: (272) [apply] apply:maplist_([1667, 0], _313188, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1667, 0], [_351184|_351186], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1667, _351184)
^  Unify: (273) [user] mfix_vars1(1667, _351184)
   Call: (274) [system] var(1667)
^  Redo: (273) [user] mfix_vars1(1667, _351184)
^  Unify: (273) [user] mfix_vars1(1667, '$VAR'(_355830))
   Call: (274) [system] atom(1667)
^  Redo: (273) [user] mfix_vars1(1667, _351184)
^  Unify: (273) [user] mfix_vars1(1667, _351184)
   Call: (274) [system] 1667==true
^  Redo: (273) [user] mfix_vars1(1667, _351184)
^  Unify: (273) [user] mfix_vars1(1667, _351184)
   Call: (274) [system] 1667==false
^  Redo: (273) [user] mfix_vars1(1667, _351184)
^  Unify: (273) [user] mfix_vars1(1667, _351184)
   Call: (274) [system] 1667==[_365110, _365116]
^  Redo: (273) [user] mfix_vars1(1667, _351184)
^  Unify: (273) [user] mfix_vars1(1667, _351184)
   Call: (274) [system] is_list(1667)
^  Redo: (273) [user] mfix_vars1(1667, _351184)
^  Unify: (273) [user] mfix_vars1(1667, _351184)
   Call: (274) [system] string(1667)
^  Redo: (273) [user] mfix_vars1(1667, _351184)
^  Unify: (273) [user] mfix_vars1(1667, _351184)
   Call: (274) [system] compound(1667)
^  Redo: (273) [user] mfix_vars1(1667, _351184)
^  Unify: (273) [user] mfix_vars1(1667, _351184)
^  Call: (274) [user] symbol(1667)
^  Unify: (274) [user] symbol(1667)
   Call: (275) [system] atom(1667)
   Fail: (275) [system] atom(1667)
^  Fail: (274) [user] symbol(1667)
^  Redo: (273) [user] mfix_vars1(1667, _351184)
   Call: (274) [system] 1667=_351184
   Exit: (274) [system] 1667=1667
^  Exit: (273) [user] mfix_vars1(1667, 1667)
   Call: (273) [apply] apply:maplist_([0], _351186, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_385510|_385512], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _385510)
^  Unify: (274) [user] mfix_vars1(0, _385510)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _385510)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_390156))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _385510)
^  Unify: (274) [user] mfix_vars1(0, _385510)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _385510)
^  Unify: (274) [user] mfix_vars1(0, _385510)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _385510)
^  Unify: (274) [user] mfix_vars1(0, _385510)
   Call: (275) [system] 0==[_399436, _399442]
^  Redo: (274) [user] mfix_vars1(0, _385510)
^  Unify: (274) [user] mfix_vars1(0, _385510)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _385510)
^  Unify: (274) [user] mfix_vars1(0, _385510)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _385510)
^  Unify: (274) [user] mfix_vars1(0, _385510)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _385510)
^  Unify: (274) [user] mfix_vars1(0, _385510)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _385510)
   Call: (275) [system] 0=_385510
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _385512, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1667, 0], [1667, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     let parser = SExprParser::new(r#\"", 1667, 0], [";;     let parser = SExprParser::new(r#\"", 1667, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let parser = SExprParser::new(r#\"", 1667, 0], [";;     let parser = SExprParser::new(r#\"", 1667, 0])
   Call: (270) [system] compound_name_arguments(_279684, '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1667, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1667, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0)))
   Call: (267) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _274098)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _435684))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _435684))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _435684))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _435684))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _435684)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _435684)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _441270))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _441270))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _441270)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _441270)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _441270)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0)))
   Call: (267) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _435684)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _268486))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _268486))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _268486))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _268486))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _268486)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _268486)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _463590))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _463590))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _463590)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _463590)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _463590)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0)))
   Call: (267) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _268486)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0)))
   Call: (261) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _492368, [], _492370)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _492368, [], _492370)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _492368, [], _492370)
   Call: (258) [system] atom('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _492368, [], _492370)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _492368, [], _492370)
   Call: (258) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), _501684, _501686)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1667, 0])
^  Call: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1667, 0], _503570, [], _492370)
^  Unify: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1667, 0], [";;     let parser = SExprParser::new(r#\"", 1667, 0], [], [])
   Call: (259) [system] var([";;     let parser = SExprParser::new(r#\"", 1667, 0])
^  Redo: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1667, 0], _503570, [], _492370)
^  Unify: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1667, 0], [_507306|_507308], [], _492370)
^  Call: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _507306, [], _508246)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"", [], [])
   Call: (260) [system] var(";;     let parser = SExprParser::new(r#\"")
^  Redo: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _507306, [], _508246)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _507306, [], _508246)
   Call: (260) [system] atom(";;     let parser = SExprParser::new(r#\"")
^  Redo: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _507306, [], _508246)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _507306, [], _508246)
   Call: (260) [system] compound(";;     let parser = SExprParser::new(r#\"")
^  Redo: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _507306, [], _508246)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"", [], [])
^  Exit: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"", [], [])
^  Call: (259) [user] subst_vars([1667, 0], _507308, [], _492370)
^  Unify: (259) [user] subst_vars([1667, 0], [1667, 0], [], [])
   Call: (260) [system] var([1667, 0])
^  Redo: (259) [user] subst_vars([1667, 0], _507308, [], _492370)
^  Unify: (259) [user] subst_vars([1667, 0], [_523178|_523180], [], _492370)
^  Call: (260) [user] subst_vars(1667, _5984, [], _5990)
^  Unify: (260) [user] subst_vars(1667, 1667, [], [])
   Call: (261) [system] var(1667)
^  Redo: (260) [user] subst_vars(1667, _5984, [], _5990)
^  Unify: (260) [user] subst_vars(1667, _5984, [], _5990)
   Call: (261) [system] atom(1667)
^  Redo: (260) [user] subst_vars(1667, _5984, [], _5990)
^  Unify: (260) [user] subst_vars(1667, _5984, [], _5990)
   Call: (261) [system] compound(1667)
^  Redo: (260) [user] subst_vars(1667, _5984, [], _5990)
^  Unify: (260) [user] subst_vars(1667, 1667, [], [])
^  Exit: (260) [user] subst_vars(1667, 1667, [], [])
^  Call: (260) [user] subst_vars([0], _5986, [], _5948)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _5986, [], _5948)
^  Unify: (260) [user] subst_vars([0], [_20882|_20884], [], _5948)
^  Call: (261) [user] subst_vars(0, _20882, [], _21822)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _20882, [], _21822)
^  Unify: (261) [user] subst_vars(0, _20882, [], _21822)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _20882, [], _21822)
^  Unify: (261) [user] subst_vars(0, _20882, [], _21822)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _20882, [], _21822)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _20884, [], _5948)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _20884, [], _5948)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1667, 0], [1667, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1667, 0], [";;     let parser = SExprParser::new(r#\"", 1667, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5946, '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1667, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1667, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), [], [])
   Call: (257) [system] _44240=metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1667, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1668, 0, 59842, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$stream_position'(59842, 1668, 0, 59876)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _96964))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _96964))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _96964)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _96964)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _96964)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _96964)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _102576))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _102576))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _102576))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _102576))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _102576)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _102576)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _108162))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _108162))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _108162)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _108162)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _108162)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _108162)
   Call: (270) [system] var('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _108162)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$VAR'(_115622))
   Call: (270) [system] atom('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _108162)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _108162)
   Call: (270) [system] '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _108162)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _108162)
   Call: (270) [system] '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _108162)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _108162)
   Call: (270) [system] '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0)==[_124902, _124908]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _108162)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _108162)
   Call: (270) [system] is_list('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _108162)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _108162)
   Call: (270) [system] string('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _108162)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _108162)
   Call: (270) [system] compound('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _135104, _135106)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT', [";;         !(get-doc NoSuchAtom)", 1668, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         !(get-doc NoSuchAtom)", 1668, 0], _138846)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(get-doc NoSuchAtom)", 1668, 0], _138846)
   Call: (271) [apply] apply:maplist_([";;         !(get-doc NoSuchAtom)", 1668, 0], _138846, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         !(get-doc NoSuchAtom)", 1668, 0], [_141664|_141666], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         !(get-doc NoSuchAtom)", _141664)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc NoSuchAtom)", _141664)
   Call: (273) [system] var(";;         !(get-doc NoSuchAtom)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc NoSuchAtom)", _141664)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc NoSuchAtom)", '$VAR'(_146310))
   Call: (273) [system] atom(";;         !(get-doc NoSuchAtom)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc NoSuchAtom)", _141664)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc NoSuchAtom)", _141664)
   Call: (273) [system] ";;         !(get-doc NoSuchAtom)"==true
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc NoSuchAtom)", _141664)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc NoSuchAtom)", _141664)
   Call: (273) [system] ";;         !(get-doc NoSuchAtom)"==false
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc NoSuchAtom)", _141664)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc NoSuchAtom)", _141664)
   Call: (273) [system] ";;         !(get-doc NoSuchAtom)"==[_155590, _155596]
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc NoSuchAtom)", _141664)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc NoSuchAtom)", _141664)
   Call: (273) [system] is_list(";;         !(get-doc NoSuchAtom)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc NoSuchAtom)", _141664)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc NoSuchAtom)", _141664)
   Call: (273) [system] string(";;         !(get-doc NoSuchAtom)")
   Exit: (273) [system] string(";;         !(get-doc NoSuchAtom)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc NoSuchAtom)", _141664)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc NoSuchAtom)", _141664)
   Call: (273) [system] compound(";;         !(get-doc NoSuchAtom)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc NoSuchAtom)", _141664)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc NoSuchAtom)", _141664)
^  Call: (273) [user] symbol(";;         !(get-doc NoSuchAtom)")
^  Unify: (273) [user] symbol(";;         !(get-doc NoSuchAtom)")
   Call: (274) [system] atom(";;         !(get-doc NoSuchAtom)")
   Fail: (274) [system] atom(";;         !(get-doc NoSuchAtom)")
^  Fail: (273) [user] symbol(";;         !(get-doc NoSuchAtom)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc NoSuchAtom)", _141664)
   Call: (273) [system] ";;         !(get-doc NoSuchAtom)"=_141664
   Exit: (273) [system] ";;         !(get-doc NoSuchAtom)"=";;         !(get-doc NoSuchAtom)"
^  Exit: (272) [user] mfix_vars1(";;         !(get-doc NoSuchAtom)", ";;         !(get-doc NoSuchAtom)")
   Call: (272) [apply] apply:maplist_([1668, 0], _141666, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1668, 0], [_179662|_179664], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1668, _179662)
^  Unify: (273) [user] mfix_vars1(1668, _179662)
   Call: (274) [system] var(1668)
^  Redo: (273) [user] mfix_vars1(1668, _179662)
^  Unify: (273) [user] mfix_vars1(1668, '$VAR'(_184308))
   Call: (274) [system] atom(1668)
^  Redo: (273) [user] mfix_vars1(1668, _179662)
^  Unify: (273) [user] mfix_vars1(1668, _179662)
   Call: (274) [system] 1668==true
^  Redo: (273) [user] mfix_vars1(1668, _179662)
^  Unify: (273) [user] mfix_vars1(1668, _179662)
   Call: (274) [system] 1668==false
^  Redo: (273) [user] mfix_vars1(1668, _179662)
^  Unify: (273) [user] mfix_vars1(1668, _179662)
   Call: (274) [system] 1668==[_193588, _193594]
^  Redo: (273) [user] mfix_vars1(1668, _179662)
^  Unify: (273) [user] mfix_vars1(1668, _179662)
   Call: (274) [system] is_list(1668)
^  Redo: (273) [user] mfix_vars1(1668, _179662)
^  Unify: (273) [user] mfix_vars1(1668, _179662)
   Call: (274) [system] string(1668)
^  Redo: (273) [user] mfix_vars1(1668, _179662)
^  Unify: (273) [user] mfix_vars1(1668, _179662)
   Call: (274) [system] compound(1668)
^  Redo: (273) [user] mfix_vars1(1668, _179662)
^  Unify: (273) [user] mfix_vars1(1668, _179662)
^  Call: (274) [user] symbol(1668)
^  Unify: (274) [user] symbol(1668)
   Call: (275) [system] atom(1668)
   Fail: (275) [system] atom(1668)
^  Fail: (274) [user] symbol(1668)
^  Redo: (273) [user] mfix_vars1(1668, _179662)
   Call: (274) [system] 1668=_179662
   Exit: (274) [system] 1668=1668
^  Exit: (273) [user] mfix_vars1(1668, 1668)
   Call: (273) [apply] apply:maplist_([0], _179664, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_213988|_213990], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _213988)
^  Unify: (274) [user] mfix_vars1(0, _213988)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _213988)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_218634))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _213988)
^  Unify: (274) [user] mfix_vars1(0, _213988)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _213988)
^  Unify: (274) [user] mfix_vars1(0, _213988)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _213988)
^  Unify: (274) [user] mfix_vars1(0, _213988)
   Call: (275) [system] 0==[_227914, _227920]
^  Redo: (274) [user] mfix_vars1(0, _213988)
^  Unify: (274) [user] mfix_vars1(0, _213988)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _213988)
^  Unify: (274) [user] mfix_vars1(0, _213988)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _213988)
^  Unify: (274) [user] mfix_vars1(0, _213988)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _213988)
^  Unify: (274) [user] mfix_vars1(0, _213988)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _213988)
   Call: (275) [system] 0=_213988
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _213990, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1668, 0], [1668, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         !(get-doc NoSuchAtom)", 1668, 0], [";;         !(get-doc NoSuchAtom)", 1668, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(get-doc NoSuchAtom)", 1668, 0], [";;         !(get-doc NoSuchAtom)", 1668, 0])
   Call: (270) [system] compound_name_arguments(_108162, '$COMMENT', [";;         !(get-doc NoSuchAtom)", 1668, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT', [";;         !(get-doc NoSuchAtom)", 1668, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0)\=@='$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _102576)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _264162))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _264162))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _264162))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _264162))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _264162)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _264162)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _269748))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _269748))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _269748)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _269748)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _269748)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0)\=@='$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _264162)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _96964))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _96964))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _96964))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _96964))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _96964)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _96964)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _292068))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _292068))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _292068)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _292068)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _292068)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0)\=@='$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _96964)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0)))
   Call: (261) [system] '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0)\=@='$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _320846, [], _320848)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _320846, [], _320848)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _320846, [], _320848)
   Call: (258) [system] atom('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _320846, [], _320848)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _320846, [], _320848)
   Call: (258) [system] compound('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), _330162, _330164)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT', [";;         !(get-doc NoSuchAtom)", 1668, 0])
^  Call: (258) [user] subst_vars([";;         !(get-doc NoSuchAtom)", 1668, 0], _332048, [], _320848)
^  Unify: (258) [user] subst_vars([";;         !(get-doc NoSuchAtom)", 1668, 0], [";;         !(get-doc NoSuchAtom)", 1668, 0], [], [])
   Call: (259) [system] var([";;         !(get-doc NoSuchAtom)", 1668, 0])
^  Redo: (258) [user] subst_vars([";;         !(get-doc NoSuchAtom)", 1668, 0], _332048, [], _320848)
^  Unify: (258) [user] subst_vars([";;         !(get-doc NoSuchAtom)", 1668, 0], [_335784|_335786], [], _320848)
^  Call: (259) [user] subst_vars(";;         !(get-doc NoSuchAtom)", _335784, [], _336724)
^  Unify: (259) [user] subst_vars(";;         !(get-doc NoSuchAtom)", ";;         !(get-doc NoSuchAtom)", [], [])
   Call: (260) [system] var(";;         !(get-doc NoSuchAtom)")
^  Redo: (259) [user] subst_vars(";;         !(get-doc NoSuchAtom)", _335784, [], _336724)
^  Unify: (259) [user] subst_vars(";;         !(get-doc NoSuchAtom)", _335784, [], _336724)
   Call: (260) [system] atom(";;         !(get-doc NoSuchAtom)")
^  Redo: (259) [user] subst_vars(";;         !(get-doc NoSuchAtom)", _335784, [], _336724)
^  Unify: (259) [user] subst_vars(";;         !(get-doc NoSuchAtom)", _335784, [], _336724)
   Call: (260) [system] compound(";;         !(get-doc NoSuchAtom)")
^  Redo: (259) [user] subst_vars(";;         !(get-doc NoSuchAtom)", _335784, [], _336724)
^  Unify: (259) [user] subst_vars(";;         !(get-doc NoSuchAtom)", ";;         !(get-doc NoSuchAtom)", [], [])
^  Exit: (259) [user] subst_vars(";;         !(get-doc NoSuchAtom)", ";;         !(get-doc NoSuchAtom)", [], [])
^  Call: (259) [user] subst_vars([1668, 0], _335786, [], _320848)
^  Unify: (259) [user] subst_vars([1668, 0], [1668, 0], [], [])
   Call: (260) [system] var([1668, 0])
^  Redo: (259) [user] subst_vars([1668, 0], _335786, [], _320848)
^  Unify: (259) [user] subst_vars([1668, 0], [_351656|_351658], [], _320848)
^  Call: (260) [user] subst_vars(1668, _351656, [], _352596)
^  Unify: (260) [user] subst_vars(1668, 1668, [], [])
   Call: (261) [system] var(1668)
^  Redo: (260) [user] subst_vars(1668, _351656, [], _352596)
^  Unify: (260) [user] subst_vars(1668, _351656, [], _352596)
   Call: (261) [system] atom(1668)
^  Redo: (260) [user] subst_vars(1668, _351656, [], _352596)
^  Unify: (260) [user] subst_vars(1668, _351656, [], _352596)
   Call: (261) [system] compound(1668)
^  Redo: (260) [user] subst_vars(1668, _351656, [], _352596)
^  Unify: (260) [user] subst_vars(1668, 1668, [], [])
^  Exit: (260) [user] subst_vars(1668, 1668, [], [])
^  Call: (260) [user] subst_vars([0], _351658, [], _320848)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _351658, [], _320848)
^  Unify: (260) [user] subst_vars([0], [_367528|_367530], [], _320848)
^  Call: (261) [user] subst_vars(0, _367528, [], _368468)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _367528, [], _368468)
^  Unify: (261) [user] subst_vars(0, _367528, [], _368468)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _367528, [], _368468)
^  Unify: (261) [user] subst_vars(0, _367528, [], _368468)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _367528, [], _368468)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _367530, [], _320848)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _367530, [], _320848)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1668, 0], [1668, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         !(get-doc NoSuchAtom)", 1668, 0], [";;         !(get-doc NoSuchAtom)", 1668, 0], [], [])
   Call: (258) [system] compound_name_arguments(_320846, '$COMMENT', [";;         !(get-doc NoSuchAtom)", 1668, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT', [";;         !(get-doc NoSuchAtom)", 1668, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), [], [])
   Call: (257) [system] _390886=metta_file_buffer(+, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc NoSuchAtom)", 1668, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1669, 0, 59875, '$COMMENT'(";;     \"#);", 1669, 0), '$stream_position'(59875, 1669, 0, 59909)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1669, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1669, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1669, 0), _443604))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1669, 0), _443604))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1669, 0), _443604)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     \"#);", 1669, 0), _443604)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     \"#);", 1669, 0), _443604)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     \"#);", 1669, 0), _443604)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1669, 0), _449216))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1669, 0), _449216))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1669, 0), _449216))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1669, 0), _449216))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1669, 0), _449216)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1669, 0), _449216)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     \"#);", 1669, 0), _454802))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     \"#);", 1669, 0), _454802))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     \"#);", 1669, 0), _454802)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     \"#);", 1669, 0), _454802)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1669, 0), _454802)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1669, 0), _454802)
   Call: (270) [system] var('$COMMENT'(";;     \"#);", 1669, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1669, 0), _454802)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1669, 0), '$VAR'(_462262))
   Call: (270) [system] atom('$COMMENT'(";;     \"#);", 1669, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1669, 0), _454802)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1669, 0), _454802)
   Call: (270) [system] '$COMMENT'(";;     \"#);", 1669, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1669, 0), _454802)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1669, 0), _454802)
   Call: (270) [system] '$COMMENT'(";;     \"#);", 1669, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1669, 0), _454802)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1669, 0), _454802)
   Call: (270) [system] '$COMMENT'(";;     \"#);", 1669, 0)==[_471542, _471548]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1669, 0), _454802)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1669, 0), _454802)
   Call: (270) [system] is_list('$COMMENT'(";;     \"#);", 1669, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1669, 0), _454802)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1669, 0), _454802)
   Call: (270) [system] string('$COMMENT'(";;     \"#);", 1669, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1669, 0), _454802)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1669, 0), _454802)
   Call: (270) [system] compound('$COMMENT'(";;     \"#);", 1669, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     \"#);", 1669, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1669, 0), _481744, _481746)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT', [";;     \"#);", 1669, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     \"#);", 1669, 0], _485486)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     \"#);", 1669, 0], _485486)
   Call: (271) [apply] apply:maplist_([";;     \"#);", 1669, 0], _485486, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     \"#);", 1669, 0], [_488304|_488306], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     \"#);", _488304)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _488304)
   Call: (273) [system] var(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _488304)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", '$VAR'(_492950))
   Call: (273) [system] atom(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _488304)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _488304)
   Call: (273) [system] ";;     \"#);"==true
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _488304)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _488304)
   Call: (273) [system] ";;     \"#);"==false
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _488304)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _488304)
   Call: (273) [system] ";;     \"#);"==[_502230, _502236]
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _488304)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _488304)
   Call: (273) [system] is_list(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _488304)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _488304)
   Call: (273) [system] string(";;     \"#);")
   Exit: (273) [system] string(";;     \"#);")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _488304)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _488304)
   Call: (273) [system] compound(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _488304)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _488304)
^  Call: (273) [user] symbol(";;     \"#);")
^  Unify: (273) [user] symbol(";;     \"#);")
   Call: (274) [system] atom(";;     \"#);")
   Fail: (274) [system] atom(";;     \"#);")
^  Fail: (273) [user] symbol(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _488304)
   Call: (273) [system] ";;     \"#);"=_488304
   Exit: (273) [system] ";;     \"#);"=";;     \"#);"
^  Exit: (272) [user] mfix_vars1(";;     \"#);", ";;     \"#);")
   Call: (272) [apply] apply:maplist_([1669, 0], _6026, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1669, 0], [_8466|_8468], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1669, _8466)
^  Unify: (273) [user] mfix_vars1(1669, _8466)
   Call: (274) [system] var(1669)
^  Redo: (273) [user] mfix_vars1(1669, _8466)
^  Unify: (273) [user] mfix_vars1(1669, '$VAR'(_13112))
   Call: (274) [system] atom(1669)
^  Redo: (273) [user] mfix_vars1(1669, _8466)
^  Unify: (273) [user] mfix_vars1(1669, _8466)
   Call: (274) [system] 1669==true
^  Redo: (273) [user] mfix_vars1(1669, _8466)
^  Unify: (273) [user] mfix_vars1(1669, _8466)
   Call: (274) [system] 1669==false
^  Redo: (273) [user] mfix_vars1(1669, _8466)
^  Unify: (273) [user] mfix_vars1(1669, _8466)
   Call: (274) [system] 1669==[_22392, _22398]
^  Redo: (273) [user] mfix_vars1(1669, _8466)
^  Unify: (273) [user] mfix_vars1(1669, _8466)
   Call: (274) [system] is_list(1669)
^  Redo: (273) [user] mfix_vars1(1669, _8466)
^  Unify: (273) [user] mfix_vars1(1669, _8466)
   Call: (274) [system] string(1669)
^  Redo: (273) [user] mfix_vars1(1669, _8466)
^  Unify: (273) [user] mfix_vars1(1669, _8466)
   Call: (274) [system] compound(1669)
^  Redo: (273) [user] mfix_vars1(1669, _8466)
^  Unify: (273) [user] mfix_vars1(1669, _8466)
^  Call: (274) [user] symbol(1669)
^  Unify: (274) [user] symbol(1669)
   Call: (275) [system] atom(1669)
   Fail: (275) [system] atom(1669)
^  Fail: (274) [user] symbol(1669)
^  Redo: (273) [user] mfix_vars1(1669, _8466)
   Call: (274) [system] 1669=_8466
   Exit: (274) [system] 1669=1669
^  Exit: (273) [user] mfix_vars1(1669, 1669)
   Call: (273) [apply] apply:maplist_([0], _8468, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_42792|_42794], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _42792)
^  Unify: (274) [user] mfix_vars1(0, _42792)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _42792)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_47438))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _42792)
^  Unify: (274) [user] mfix_vars1(0, _42792)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _42792)
^  Unify: (274) [user] mfix_vars1(0, _42792)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _42792)
^  Unify: (274) [user] mfix_vars1(0, _42792)
   Call: (275) [system] 0==[_56718, _56724]
^  Redo: (274) [user] mfix_vars1(0, _42792)
^  Unify: (274) [user] mfix_vars1(0, _42792)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _42792)
^  Unify: (274) [user] mfix_vars1(0, _42792)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _42792)
^  Unify: (274) [user] mfix_vars1(0, _42792)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _42792)
^  Unify: (274) [user] mfix_vars1(0, _42792)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _42792)
   Call: (275) [system] 0=_42792
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _42794, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1669, 0], [1669, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     \"#);", 1669, 0], [";;     \"#);", 1669, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     \"#);", 1669, 0], [";;     \"#);", 1669, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";;     \"#);", 1669, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT', [";;     \"#);", 1669, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0)))
   Call: (267) [system] '$COMMENT'(";;     \"#);", 1669, 0)\=@='$COMMENT'(";;     \"#);", 1669, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1669, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     \"#);", 1669, 0), _92966))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1669, 0), _92966))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1669, 0), _92966))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1669, 0), _92966))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1669, 0), _92966)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1669, 0), _92966)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     \"#);", 1669, 0), _98552))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     \"#);", 1669, 0), _98552))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     \"#);", 1669, 0), _98552)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     \"#);", 1669, 0), _98552)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     \"#);", 1669, 0), _98552)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0)))
   Call: (267) [system] '$COMMENT'(";;     \"#);", 1669, 0)\=@='$COMMENT'(";;     \"#);", 1669, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1669, 0), _92966)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     \"#);", 1669, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1669, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1669, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1669, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1669, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1669, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     \"#);", 1669, 0), _120872))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     \"#);", 1669, 0), _120872))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     \"#);", 1669, 0), _120872)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     \"#);", 1669, 0), _120872)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     \"#);", 1669, 0), _120872)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0)))
   Call: (267) [system] '$COMMENT'(";;     \"#);", 1669, 0)\=@='$COMMENT'(";;     \"#);", 1669, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1669, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0)))
   Call: (261) [system] '$COMMENT'(";;     \"#);", 1669, 0)\=@='$COMMENT'(";;     \"#);", 1669, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1669, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1669, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1669, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1669, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1669, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1669, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1669, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1669, 0), _149650, [], _149652)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     \"#);", 1669, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1669, 0), _149650, [], _149652)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1669, 0), _149650, [], _149652)
   Call: (258) [system] atom('$COMMENT'(";;     \"#);", 1669, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1669, 0), _149650, [], _149652)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1669, 0), _149650, [], _149652)
   Call: (258) [system] compound('$COMMENT'(";;     \"#);", 1669, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     \"#);", 1669, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1669, 0), _158966, _158968)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT', [";;     \"#);", 1669, 0])
^  Call: (258) [user] subst_vars([";;     \"#);", 1669, 0], _160852, [], _149652)
^  Unify: (258) [user] subst_vars([";;     \"#);", 1669, 0], [";;     \"#);", 1669, 0], [], [])
   Call: (259) [system] var([";;     \"#);", 1669, 0])
^  Redo: (258) [user] subst_vars([";;     \"#);", 1669, 0], _160852, [], _149652)
^  Unify: (258) [user] subst_vars([";;     \"#);", 1669, 0], [_164588|_164590], [], _149652)
^  Call: (259) [user] subst_vars(";;     \"#);", _164588, [], _165528)
^  Unify: (259) [user] subst_vars(";;     \"#);", ";;     \"#);", [], [])
   Call: (260) [system] var(";;     \"#);")
^  Redo: (259) [user] subst_vars(";;     \"#);", _164588, [], _165528)
^  Unify: (259) [user] subst_vars(";;     \"#);", _164588, [], _165528)
   Call: (260) [system] atom(";;     \"#);")
^  Redo: (259) [user] subst_vars(";;     \"#);", _164588, [], _165528)
^  Unify: (259) [user] subst_vars(";;     \"#);", _164588, [], _165528)
   Call: (260) [system] compound(";;     \"#);")
^  Redo: (259) [user] subst_vars(";;     \"#);", _164588, [], _165528)
^  Unify: (259) [user] subst_vars(";;     \"#);", ";;     \"#);", [], [])
^  Exit: (259) [user] subst_vars(";;     \"#);", ";;     \"#);", [], [])
^  Call: (259) [user] subst_vars([1669, 0], _164590, [], _149652)
^  Unify: (259) [user] subst_vars([1669, 0], [1669, 0], [], [])
   Call: (260) [system] var([1669, 0])
^  Redo: (259) [user] subst_vars([1669, 0], _164590, [], _149652)
^  Unify: (259) [user] subst_vars([1669, 0], [_180460|_180462], [], _149652)
^  Call: (260) [user] subst_vars(1669, _180460, [], _181400)
^  Unify: (260) [user] subst_vars(1669, 1669, [], [])
   Call: (261) [system] var(1669)
^  Redo: (260) [user] subst_vars(1669, _180460, [], _181400)
^  Unify: (260) [user] subst_vars(1669, _180460, [], _181400)
   Call: (261) [system] atom(1669)
^  Redo: (260) [user] subst_vars(1669, _180460, [], _181400)
^  Unify: (260) [user] subst_vars(1669, _180460, [], _181400)
   Call: (261) [system] compound(1669)
^  Redo: (260) [user] subst_vars(1669, _180460, [], _181400)
^  Unify: (260) [user] subst_vars(1669, 1669, [], [])
^  Exit: (260) [user] subst_vars(1669, 1669, [], [])
^  Call: (260) [user] subst_vars([0], _180462, [], _149652)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _180462, [], _149652)
^  Unify: (260) [user] subst_vars([0], [_196332|_196334], [], _149652)
^  Call: (261) [user] subst_vars(0, _196332, [], _197272)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _196332, [], _197272)
^  Unify: (261) [user] subst_vars(0, _196332, [], _197272)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _196332, [], _197272)
^  Unify: (261) [user] subst_vars(0, _196332, [], _197272)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _196332, [], _197272)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _196334, [], _149652)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _196334, [], _149652)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1669, 0], [1669, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     \"#);", 1669, 0], [";;     \"#);", 1669, 0], [], [])
   Call: (258) [system] compound_name_arguments(_149650, '$COMMENT', [";;     \"#);", 1669, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT', [";;     \"#);", 1669, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1669, 0), '$COMMENT'(";;     \"#);", 1669, 0), [], [])
   Call: (257) [system] _219690=metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1669, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1669, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1669, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1669, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1669, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1669, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1669, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1669, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1669, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1670, 0, 59887, '$COMMENT'(";;", 1670, 0), '$stream_position'(59887, 1670, 0, 59921)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1670, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1670, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1670, 0), _272406))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1670, 0), _272406))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1670, 0), _272406)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1670, 0), _272406)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1670, 0), _272406)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1670, 0), _272406)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1670, 0), _278018))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1670, 0), _278018))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1670, 0), _278018))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1670, 0), _278018))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1670, 0), _278018)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1670, 0), _278018)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1670, 0), _283604))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1670, 0), _283604))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1670, 0), _283604)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1670, 0), _283604)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1670, 0), _283604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1670, 0), _283604)
   Call: (270) [system] var('$COMMENT'(";;", 1670, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1670, 0), _283604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1670, 0), '$VAR'(_291064))
   Call: (270) [system] atom('$COMMENT'(";;", 1670, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1670, 0), _283604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1670, 0), _283604)
   Call: (270) [system] '$COMMENT'(";;", 1670, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1670, 0), _283604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1670, 0), _283604)
   Call: (270) [system] '$COMMENT'(";;", 1670, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1670, 0), _283604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1670, 0), _283604)
   Call: (270) [system] '$COMMENT'(";;", 1670, 0)==[_300344, _300350]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1670, 0), _283604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1670, 0), _283604)
   Call: (270) [system] is_list('$COMMENT'(";;", 1670, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1670, 0), _283604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1670, 0), _283604)
   Call: (270) [system] string('$COMMENT'(";;", 1670, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1670, 0), _283604)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1670, 0), _283604)
   Call: (270) [system] compound('$COMMENT'(";;", 1670, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1670, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1670, 0), _310546, _310548)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1670, 0), '$COMMENT', [";;", 1670, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1670, 0], _314288)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1670, 0], _314288)
   Call: (271) [apply] apply:maplist_([";;", 1670, 0], _314288, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1670, 0], [_317106|_317108], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _317106)
^  Unify: (272) [user] mfix_vars1(";;", _317106)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _317106)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_321752))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _317106)
^  Unify: (272) [user] mfix_vars1(";;", _317106)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _317106)
^  Unify: (272) [user] mfix_vars1(";;", _317106)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _317106)
^  Unify: (272) [user] mfix_vars1(";;", _317106)
   Call: (273) [system] ";;"==[_331032, _331038]
^  Redo: (272) [user] mfix_vars1(";;", _317106)
^  Unify: (272) [user] mfix_vars1(";;", _317106)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _317106)
^  Unify: (272) [user] mfix_vars1(";;", _317106)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _317106)
^  Unify: (272) [user] mfix_vars1(";;", _317106)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _317106)
^  Unify: (272) [user] mfix_vars1(";;", _317106)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _317106)
   Call: (273) [system] ";;"=_317106
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1670, 0], _317108, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1670, 0], [_355104|_355106], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1670, _355104)
^  Unify: (273) [user] mfix_vars1(1670, _355104)
   Call: (274) [system] var(1670)
^  Redo: (273) [user] mfix_vars1(1670, _355104)
^  Unify: (273) [user] mfix_vars1(1670, '$VAR'(_359750))
   Call: (274) [system] atom(1670)
^  Redo: (273) [user] mfix_vars1(1670, _355104)
^  Unify: (273) [user] mfix_vars1(1670, _355104)
   Call: (274) [system] 1670==true
^  Redo: (273) [user] mfix_vars1(1670, _355104)
^  Unify: (273) [user] mfix_vars1(1670, _355104)
   Call: (274) [system] 1670==false
^  Redo: (273) [user] mfix_vars1(1670, _355104)
^  Unify: (273) [user] mfix_vars1(1670, _355104)
   Call: (274) [system] 1670==[_369030, _369036]
^  Redo: (273) [user] mfix_vars1(1670, _355104)
^  Unify: (273) [user] mfix_vars1(1670, _355104)
   Call: (274) [system] is_list(1670)
^  Redo: (273) [user] mfix_vars1(1670, _355104)
^  Unify: (273) [user] mfix_vars1(1670, _355104)
   Call: (274) [system] string(1670)
^  Redo: (273) [user] mfix_vars1(1670, _355104)
^  Unify: (273) [user] mfix_vars1(1670, _355104)
   Call: (274) [system] compound(1670)
^  Redo: (273) [user] mfix_vars1(1670, _355104)
^  Unify: (273) [user] mfix_vars1(1670, _355104)
^  Call: (274) [user] symbol(1670)
^  Unify: (274) [user] symbol(1670)
   Call: (275) [system] atom(1670)
   Fail: (275) [system] atom(1670)
^  Fail: (274) [user] symbol(1670)
^  Redo: (273) [user] mfix_vars1(1670, _355104)
   Call: (274) [system] 1670=_355104
   Exit: (274) [system] 1670=1670
^  Exit: (273) [user] mfix_vars1(1670, 1670)
   Call: (273) [apply] apply:maplist_([0], _355106, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_389430|_389432], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _389430)
^  Unify: (274) [user] mfix_vars1(0, _389430)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _389430)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_394076))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _389430)
^  Unify: (274) [user] mfix_vars1(0, _389430)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _389430)
^  Unify: (274) [user] mfix_vars1(0, _389430)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _389430)
^  Unify: (274) [user] mfix_vars1(0, _389430)
   Call: (275) [system] 0==[_403356, _403362]
^  Redo: (274) [user] mfix_vars1(0, _389430)
^  Unify: (274) [user] mfix_vars1(0, _389430)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _389430)
^  Unify: (274) [user] mfix_vars1(0, _389430)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _389430)
^  Unify: (274) [user] mfix_vars1(0, _389430)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _389430)
^  Unify: (274) [user] mfix_vars1(0, _389430)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _389430)
   Call: (275) [system] 0=_389430
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _389432, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1670, 0], [1670, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1670, 0], [";;", 1670, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1670, 0], [";;", 1670, 0])
   Call: (270) [system] compound_name_arguments(_283604, '$COMMENT', [";;", 1670, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1670, 0), '$COMMENT', [";;", 1670, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1670, 0)\=@='$COMMENT'(";;", 1670, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1670, 0), _278018)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1670, 0), _439604))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1670, 0), _439604))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1670, 0), _439604))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1670, 0), _439604))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1670, 0), _439604)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1670, 0), _439604)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1670, 0), _445190))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1670, 0), _445190))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1670, 0), _445190)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1670, 0), _445190)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1670, 0), _445190)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1670, 0)\=@='$COMMENT'(";;", 1670, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1670, 0), _439604)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1670, 0), _272406))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1670, 0), _272406))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1670, 0), _272406))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1670, 0), _272406))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1670, 0), _272406)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1670, 0), _272406)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1670, 0), _467510))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1670, 0), _467510))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1670, 0), _467510)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1670, 0), _467510)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1670, 0), _467510)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1670, 0)\=@='$COMMENT'(";;", 1670, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1670, 0), _272406)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1670, 0)\=@='$COMMENT'(";;", 1670, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1670, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1670, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1670, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1670, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1670, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1670, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1670, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1670, 0), _496288, [], _496290)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1670, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1670, 0), _496288, [], _496290)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1670, 0), _496288, [], _496290)
   Call: (258) [system] atom('$COMMENT'(";;", 1670, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1670, 0), _496288, [], _496290)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1670, 0), _496288, [], _496290)
   Call: (258) [system] compound('$COMMENT'(";;", 1670, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1670, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1670, 0), _505604, _505606)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1670, 0), '$COMMENT', [";;", 1670, 0])
^  Call: (258) [user] subst_vars([";;", 1670, 0], _507490, [], _496290)
^  Unify: (258) [user] subst_vars([";;", 1670, 0], [";;", 1670, 0], [], [])
   Call: (259) [system] var([";;", 1670, 0])
^  Redo: (258) [user] subst_vars([";;", 1670, 0], _507490, [], _496290)
^  Unify: (258) [user] subst_vars([";;", 1670, 0], [_511226|_511228], [], _496290)
^  Call: (259) [user] subst_vars(";;", _511226, [], _512166)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _511226, [], _512166)
^  Unify: (259) [user] subst_vars(";;", _511226, [], _512166)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _511226, [], _512166)
^  Unify: (259) [user] subst_vars(";;", _511226, [], _512166)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _511226, [], _512166)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1670, 0], _5968, [], _5938)
^  Unify: (259) [user] subst_vars([1670, 0], [1670, 0], [], [])
   Call: (260) [system] var([1670, 0])
^  Redo: (259) [user] subst_vars([1670, 0], _5968, [], _5938)
^  Unify: (259) [user] subst_vars([1670, 0], [_9128|_9130], [], _5938)
^  Call: (260) [user] subst_vars(1670, _9128, [], _10068)
^  Unify: (260) [user] subst_vars(1670, 1670, [], [])
   Call: (261) [system] var(1670)
^  Redo: (260) [user] subst_vars(1670, _9128, [], _10068)
^  Unify: (260) [user] subst_vars(1670, _9128, [], _10068)
   Call: (261) [system] atom(1670)
^  Redo: (260) [user] subst_vars(1670, _9128, [], _10068)
^  Unify: (260) [user] subst_vars(1670, _9128, [], _10068)
   Call: (261) [system] compound(1670)
^  Redo: (260) [user] subst_vars(1670, _9128, [], _10068)
^  Unify: (260) [user] subst_vars(1670, 1670, [], [])
^  Exit: (260) [user] subst_vars(1670, 1670, [], [])
^  Call: (260) [user] subst_vars([0], _9130, [], _5938)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _9130, [], _5938)
^  Unify: (260) [user] subst_vars([0], [_25000|_25002], [], _5938)
^  Call: (261) [user] subst_vars(0, _25000, [], _25940)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _25000, [], _25940)
^  Unify: (261) [user] subst_vars(0, _25000, [], _25940)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _25000, [], _25940)
^  Unify: (261) [user] subst_vars(0, _25000, [], _25940)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _25000, [], _25940)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _25002, [], _5938)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _25002, [], _5938)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1670, 0], [1670, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1670, 0], [";;", 1670, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5936, '$COMMENT', [";;", 1670, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1670, 0), '$COMMENT', [";;", 1670, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1670, 0), '$COMMENT'(";;", 1670, 0), [], [])
   Call: (257) [system] _48358=metta_file_buffer(+, '$COMMENT'(";;", 1670, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1670, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1670, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1670, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1670, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1670, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1670, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1670, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1670, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1671, 0, 59890, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$stream_position'(59890, 1671, 0, 59924)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _101088))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _101088))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _101088)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _101088)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _101088)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _101088)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _106700))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _106700))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _106700))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _106700))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _106700)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _106700)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _112286))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _112286))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _112286)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _112286)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _112286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _112286)
   Call: (270) [system] var('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _112286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$VAR'(_119746))
   Call: (270) [system] atom('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _112286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _112286)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _112286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _112286)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _112286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _112286)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0)==[_129026, _129032]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _112286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _112286)
   Call: (270) [system] is_list('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _112286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _112286)
   Call: (270) [system] string('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _112286)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _112286)
   Call: (270) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _139228, _139230)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0], _142970)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0], _142970)
   Call: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0], _142970, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0], [_145788|_145790], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _145788)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _145788)
   Call: (273) [system] var(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _145788)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", '$VAR'(_150434))
   Call: (273) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _145788)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _145788)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["==true
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _145788)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _145788)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["==false
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _145788)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _145788)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["==[_159714, _159720]
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _145788)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _145788)
   Call: (273) [system] is_list(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _145788)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _145788)
   Call: (273) [system] string(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Exit: (273) [system] string(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _145788)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _145788)
   Call: (273) [system] compound(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _145788)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _145788)
^  Call: (273) [user] symbol(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Unify: (273) [user] symbol(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Call: (274) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Fail: (274) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Fail: (273) [user] symbol(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _145788)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["=_145788
   Exit: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["=";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["
^  Exit: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Call: (272) [apply] apply:maplist_([1671, 0], _145790, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1671, 0], [_183786|_183788], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1671, _183786)
^  Unify: (273) [user] mfix_vars1(1671, _183786)
   Call: (274) [system] var(1671)
^  Redo: (273) [user] mfix_vars1(1671, _183786)
^  Unify: (273) [user] mfix_vars1(1671, '$VAR'(_188432))
   Call: (274) [system] atom(1671)
^  Redo: (273) [user] mfix_vars1(1671, _183786)
^  Unify: (273) [user] mfix_vars1(1671, _183786)
   Call: (274) [system] 1671==true
^  Redo: (273) [user] mfix_vars1(1671, _183786)
^  Unify: (273) [user] mfix_vars1(1671, _183786)
   Call: (274) [system] 1671==false
^  Redo: (273) [user] mfix_vars1(1671, _183786)
^  Unify: (273) [user] mfix_vars1(1671, _183786)
   Call: (274) [system] 1671==[_197712, _197718]
^  Redo: (273) [user] mfix_vars1(1671, _183786)
^  Unify: (273) [user] mfix_vars1(1671, _183786)
   Call: (274) [system] is_list(1671)
^  Redo: (273) [user] mfix_vars1(1671, _183786)
^  Unify: (273) [user] mfix_vars1(1671, _183786)
   Call: (274) [system] string(1671)
^  Redo: (273) [user] mfix_vars1(1671, _183786)
^  Unify: (273) [user] mfix_vars1(1671, _183786)
   Call: (274) [system] compound(1671)
^  Redo: (273) [user] mfix_vars1(1671, _183786)
^  Unify: (273) [user] mfix_vars1(1671, _183786)
^  Call: (274) [user] symbol(1671)
^  Unify: (274) [user] symbol(1671)
   Call: (275) [system] atom(1671)
   Fail: (275) [system] atom(1671)
^  Fail: (274) [user] symbol(1671)
^  Redo: (273) [user] mfix_vars1(1671, _183786)
   Call: (274) [system] 1671=_183786
   Exit: (274) [system] 1671=1671
^  Exit: (273) [user] mfix_vars1(1671, 1671)
   Call: (273) [apply] apply:maplist_([0], _183788, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_218112|_218114], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _218112)
^  Unify: (274) [user] mfix_vars1(0, _218112)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _218112)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_222758))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _218112)
^  Unify: (274) [user] mfix_vars1(0, _218112)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _218112)
^  Unify: (274) [user] mfix_vars1(0, _218112)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _218112)
^  Unify: (274) [user] mfix_vars1(0, _218112)
   Call: (275) [system] 0==[_232038, _232044]
^  Redo: (274) [user] mfix_vars1(0, _218112)
^  Unify: (274) [user] mfix_vars1(0, _218112)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _218112)
^  Unify: (274) [user] mfix_vars1(0, _218112)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _218112)
^  Unify: (274) [user] mfix_vars1(0, _218112)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _218112)
^  Unify: (274) [user] mfix_vars1(0, _218112)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _218112)
   Call: (275) [system] 0=_218112
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _218114, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1671, 0], [1671, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0])
   Call: (270) [system] compound_name_arguments(_112286, '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _106700)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _268286))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _268286))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _268286))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _268286))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _268286)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _268286)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _273872))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _273872))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _273872)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _273872)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _273872)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _268286)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _101088))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _101088))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _101088))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _101088))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _101088)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _101088)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _296192))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _296192))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _296192)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _296192)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _296192)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _101088)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0)))
   Call: (261) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _324970, [], _324972)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _324970, [], _324972)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _324970, [], _324972)
   Call: (258) [system] atom('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _324970, [], _324972)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _324970, [], _324972)
   Call: (258) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), _334286, _334288)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0])
^  Call: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0], _336172, [], _324972)
^  Unify: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0], [], [])
   Call: (259) [system] var([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0])
^  Redo: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0], _336172, [], _324972)
^  Unify: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0], [_339908|_339910], [], _324972)
^  Call: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _339908, [], _340848)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", [], [])
   Call: (260) [system] var(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _339908, [], _340848)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _339908, [], _340848)
   Call: (260) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _339908, [], _340848)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _339908, [], _340848)
   Call: (260) [system] compound(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _339908, [], _340848)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", [], [])
^  Exit: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", [], [])
^  Call: (259) [user] subst_vars([1671, 0], _339910, [], _324972)
^  Unify: (259) [user] subst_vars([1671, 0], [1671, 0], [], [])
   Call: (260) [system] var([1671, 0])
^  Redo: (259) [user] subst_vars([1671, 0], _339910, [], _324972)
^  Unify: (259) [user] subst_vars([1671, 0], [_355780|_355782], [], _324972)
^  Call: (260) [user] subst_vars(1671, _355780, [], _356720)
^  Unify: (260) [user] subst_vars(1671, 1671, [], [])
   Call: (261) [system] var(1671)
^  Redo: (260) [user] subst_vars(1671, _355780, [], _356720)
^  Unify: (260) [user] subst_vars(1671, _355780, [], _356720)
   Call: (261) [system] atom(1671)
^  Redo: (260) [user] subst_vars(1671, _355780, [], _356720)
^  Unify: (260) [user] subst_vars(1671, _355780, [], _356720)
   Call: (261) [system] compound(1671)
^  Redo: (260) [user] subst_vars(1671, _355780, [], _356720)
^  Unify: (260) [user] subst_vars(1671, 1671, [], [])
^  Exit: (260) [user] subst_vars(1671, 1671, [], [])
^  Call: (260) [user] subst_vars([0], _355782, [], _324972)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _355782, [], _324972)
^  Unify: (260) [user] subst_vars([0], [_371652|_371654], [], _324972)
^  Call: (261) [user] subst_vars(0, _371652, [], _372592)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _371652, [], _372592)
^  Unify: (261) [user] subst_vars(0, _371652, [], _372592)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _371652, [], _372592)
^  Unify: (261) [user] subst_vars(0, _371652, [], _372592)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _371652, [], _372592)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _371654, [], _324972)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _371654, [], _324972)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1671, 0], [1671, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0], [], [])
   Call: (258) [system] compound_name_arguments(_324970, '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), [], [])
   Call: (257) [system] _395010=metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1671, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1672, 0, 59950, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$stream_position'(59950, 1672, 0, 59984)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _447734))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _447734))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _447734)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _447734)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _447734)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _447734)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _453346))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _453346))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _453346))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _453346))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _453346)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _453346)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _458932))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _458932))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _458932)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _458932)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _458932)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _458932)
   Call: (270) [system] var('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _458932)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$VAR'(_466392))
   Call: (270) [system] atom('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _458932)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _458932)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _458932)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _458932)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _458932)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _458932)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0)==[_475672, _475678]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _458932)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _458932)
   Call: (270) [system] is_list('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _458932)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _458932)
   Call: (270) [system] string('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _458932)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _458932)
   Call: (270) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _485874, _485876)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1672, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         vec![expr!(\"@doc-formal\"", 1672, 0], _489616)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         vec![expr!(\"@doc-formal\"", 1672, 0], _489616)
   Call: (271) [apply] apply:maplist_([";;         vec![expr!(\"@doc-formal\"", 1672, 0], _489616, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         vec![expr!(\"@doc-formal\"", 1672, 0], [_492434|_492436], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _492434)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _492434)
   Call: (273) [system] var(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _492434)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", '$VAR'(_497080))
   Call: (273) [system] atom(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _492434)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _492434)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""==true
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _492434)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _492434)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""==false
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _492434)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _492434)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""==[_506360, _506366]
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _492434)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _492434)
   Call: (273) [system] is_list(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _492434)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _492434)
   Call: (273) [system] string(";;         vec![expr!(\"@doc-formal\"")
   Exit: (273) [system] string(";;         vec![expr!(\"@doc-formal\"")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _492434)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _492434)
   Call: (273) [system] compound(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _492434)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _492434)
^  Call: (273) [user] symbol(";;         vec![expr!(\"@doc-formal\"")
^  Unify: (273) [user] symbol(";;         vec![expr!(\"@doc-formal\"")
   Call: (274) [system] atom(";;         vec![expr!(\"@doc-formal\"")
   Fail: (274) [system] atom(";;         vec![expr!(\"@doc-formal\"")
^  Fail: (273) [user] symbol(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _6030)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""=_6030
   Exit: (273) [system] ";;         vec![expr!(\"@doc-formal\""=";;         vec![expr!(\"@doc-formal\""
^  Exit: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"")
   Call: (272) [apply] apply:maplist_([1672, 0], _6032, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1672, 0], [_12472|_12474], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1672, _12472)
^  Unify: (273) [user] mfix_vars1(1672, _12472)
   Call: (274) [system] var(1672)
^  Redo: (273) [user] mfix_vars1(1672, _12472)
^  Unify: (273) [user] mfix_vars1(1672, '$VAR'(_17118))
   Call: (274) [system] atom(1672)
^  Redo: (273) [user] mfix_vars1(1672, _12472)
^  Unify: (273) [user] mfix_vars1(1672, _12472)
   Call: (274) [system] 1672==true
^  Redo: (273) [user] mfix_vars1(1672, _12472)
^  Unify: (273) [user] mfix_vars1(1672, _12472)
   Call: (274) [system] 1672==false
^  Redo: (273) [user] mfix_vars1(1672, _12472)
^  Unify: (273) [user] mfix_vars1(1672, _12472)
   Call: (274) [system] 1672==[_26398, _26404]
^  Redo: (273) [user] mfix_vars1(1672, _12472)
^  Unify: (273) [user] mfix_vars1(1672, _12472)
   Call: (274) [system] is_list(1672)
^  Redo: (273) [user] mfix_vars1(1672, _12472)
^  Unify: (273) [user] mfix_vars1(1672, _12472)
   Call: (274) [system] string(1672)
^  Redo: (273) [user] mfix_vars1(1672, _12472)
^  Unify: (273) [user] mfix_vars1(1672, _12472)
   Call: (274) [system] compound(1672)
^  Redo: (273) [user] mfix_vars1(1672, _12472)
^  Unify: (273) [user] mfix_vars1(1672, _12472)
^  Call: (274) [user] symbol(1672)
^  Unify: (274) [user] symbol(1672)
   Call: (275) [system] atom(1672)
   Fail: (275) [system] atom(1672)
^  Fail: (274) [user] symbol(1672)
^  Redo: (273) [user] mfix_vars1(1672, _12472)
   Call: (274) [system] 1672=_12472
   Exit: (274) [system] 1672=1672
^  Exit: (273) [user] mfix_vars1(1672, 1672)
   Call: (273) [apply] apply:maplist_([0], _12474, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_46798|_46800], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _46798)
^  Unify: (274) [user] mfix_vars1(0, _46798)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _46798)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_51444))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _46798)
^  Unify: (274) [user] mfix_vars1(0, _46798)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _46798)
^  Unify: (274) [user] mfix_vars1(0, _46798)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _46798)
^  Unify: (274) [user] mfix_vars1(0, _46798)
   Call: (275) [system] 0==[_60724, _60730]
^  Redo: (274) [user] mfix_vars1(0, _46798)
^  Unify: (274) [user] mfix_vars1(0, _46798)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _46798)
^  Unify: (274) [user] mfix_vars1(0, _46798)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _46798)
^  Unify: (274) [user] mfix_vars1(0, _46798)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _46798)
^  Unify: (274) [user] mfix_vars1(0, _46798)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _46798)
   Call: (275) [system] 0=_46798
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _46800, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1672, 0], [1672, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         vec![expr!(\"@doc-formal\"", 1672, 0], [";;         vec![expr!(\"@doc-formal\"", 1672, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         vec![expr!(\"@doc-formal\"", 1672, 0], [";;         vec![expr!(\"@doc-formal\"", 1672, 0])
   Call: (270) [system] compound_name_arguments(_5984, '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1672, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1672, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _5970)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _96972))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _96972))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _96972))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _96972))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _96972)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _96972)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _102558))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _102558))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _102558)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _102558)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _102558)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _96972)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _124878))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _124878))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _124878)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _124878)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _124878)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0)))
   Call: (261) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _153656, [], _153658)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _153656, [], _153658)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _153656, [], _153658)
   Call: (258) [system] atom('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _153656, [], _153658)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _153656, [], _153658)
   Call: (258) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), _162972, _162974)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1672, 0])
^  Call: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1672, 0], _164858, [], _153658)
^  Unify: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1672, 0], [";;         vec![expr!(\"@doc-formal\"", 1672, 0], [], [])
   Call: (259) [system] var([";;         vec![expr!(\"@doc-formal\"", 1672, 0])
^  Redo: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1672, 0], _164858, [], _153658)
^  Unify: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1672, 0], [_168594|_168596], [], _153658)
^  Call: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _168594, [], _169534)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"", [], [])
   Call: (260) [system] var(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _168594, [], _169534)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _168594, [], _169534)
   Call: (260) [system] atom(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _168594, [], _169534)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _168594, [], _169534)
   Call: (260) [system] compound(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _168594, [], _169534)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"", [], [])
^  Exit: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"", [], [])
^  Call: (259) [user] subst_vars([1672, 0], _168596, [], _153658)
^  Unify: (259) [user] subst_vars([1672, 0], [1672, 0], [], [])
   Call: (260) [system] var([1672, 0])
^  Redo: (259) [user] subst_vars([1672, 0], _168596, [], _153658)
^  Unify: (259) [user] subst_vars([1672, 0], [_184466|_184468], [], _153658)
^  Call: (260) [user] subst_vars(1672, _184466, [], _185406)
^  Unify: (260) [user] subst_vars(1672, 1672, [], [])
   Call: (261) [system] var(1672)
^  Redo: (260) [user] subst_vars(1672, _184466, [], _185406)
^  Unify: (260) [user] subst_vars(1672, _184466, [], _185406)
   Call: (261) [system] atom(1672)
^  Redo: (260) [user] subst_vars(1672, _184466, [], _185406)
^  Unify: (260) [user] subst_vars(1672, _184466, [], _185406)
   Call: (261) [system] compound(1672)
^  Redo: (260) [user] subst_vars(1672, _184466, [], _185406)
^  Unify: (260) [user] subst_vars(1672, 1672, [], [])
^  Exit: (260) [user] subst_vars(1672, 1672, [], [])
^  Call: (260) [user] subst_vars([0], _184468, [], _153658)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _184468, [], _153658)
^  Unify: (260) [user] subst_vars([0], [_200338|_200340], [], _153658)
^  Call: (261) [user] subst_vars(0, _200338, [], _201278)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _200338, [], _201278)
^  Unify: (261) [user] subst_vars(0, _200338, [], _201278)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _200338, [], _201278)
^  Unify: (261) [user] subst_vars(0, _200338, [], _201278)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _200338, [], _201278)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _200340, [], _153658)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _200340, [], _153658)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1672, 0], [1672, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1672, 0], [";;         vec![expr!(\"@doc-formal\"", 1672, 0], [], [])
   Call: (258) [system] compound_name_arguments(_153656, '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1672, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1672, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), [], [])
   Call: (257) [system] _223696=metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1672, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1673, 0, 59986, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$stream_position'(59986, 1673, 0, 60020)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _276420))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _276420))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _276420)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _276420)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _276420)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _276420)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _282032))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _282032))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _282032))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _282032))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _282032)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _282032)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _287618))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _287618))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _287618)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _287618)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _287618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _287618)
   Call: (270) [system] var('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _287618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$VAR'(_295078))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _287618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _287618)
   Call: (270) [system] '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _287618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _287618)
   Call: (270) [system] '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _287618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _287618)
   Call: (270) [system] '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0)==[_304358, _304364]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _287618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _287618)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _287618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _287618)
   Call: (270) [system] string('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _287618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _287618)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _314560, _314562)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT', [";;             (\"@item\" \"NoSuchAtom\")", 1673, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@item\" \"NoSuchAtom\")", 1673, 0], _318302)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@item\" \"NoSuchAtom\")", 1673, 0], _318302)
   Call: (271) [apply] apply:maplist_([";;             (\"@item\" \"NoSuchAtom\")", 1673, 0], _318302, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@item\" \"NoSuchAtom\")", 1673, 0], [_321120|_321122], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@item\" \"NoSuchAtom\")", _321120)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"NoSuchAtom\")", _321120)
   Call: (273) [system] var(";;             (\"@item\" \"NoSuchAtom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"NoSuchAtom\")", _321120)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"NoSuchAtom\")", '$VAR'(_325766))
   Call: (273) [system] atom(";;             (\"@item\" \"NoSuchAtom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"NoSuchAtom\")", _321120)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"NoSuchAtom\")", _321120)
   Call: (273) [system] ";;             (\"@item\" \"NoSuchAtom\")"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"NoSuchAtom\")", _321120)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"NoSuchAtom\")", _321120)
   Call: (273) [system] ";;             (\"@item\" \"NoSuchAtom\")"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"NoSuchAtom\")", _321120)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"NoSuchAtom\")", _321120)
   Call: (273) [system] ";;             (\"@item\" \"NoSuchAtom\")"==[_335046, _335052]
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"NoSuchAtom\")", _321120)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"NoSuchAtom\")", _321120)
   Call: (273) [system] is_list(";;             (\"@item\" \"NoSuchAtom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"NoSuchAtom\")", _321120)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"NoSuchAtom\")", _321120)
   Call: (273) [system] string(";;             (\"@item\" \"NoSuchAtom\")")
   Exit: (273) [system] string(";;             (\"@item\" \"NoSuchAtom\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"NoSuchAtom\")", _321120)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"NoSuchAtom\")", _321120)
   Call: (273) [system] compound(";;             (\"@item\" \"NoSuchAtom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"NoSuchAtom\")", _321120)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"NoSuchAtom\")", _321120)
^  Call: (273) [user] symbol(";;             (\"@item\" \"NoSuchAtom\")")
^  Unify: (273) [user] symbol(";;             (\"@item\" \"NoSuchAtom\")")
   Call: (274) [system] atom(";;             (\"@item\" \"NoSuchAtom\")")
   Fail: (274) [system] atom(";;             (\"@item\" \"NoSuchAtom\")")
^  Fail: (273) [user] symbol(";;             (\"@item\" \"NoSuchAtom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"NoSuchAtom\")", _321120)
   Call: (273) [system] ";;             (\"@item\" \"NoSuchAtom\")"=_321120
   Exit: (273) [system] ";;             (\"@item\" \"NoSuchAtom\")"=";;             (\"@item\" \"NoSuchAtom\")"
^  Exit: (272) [user] mfix_vars1(";;             (\"@item\" \"NoSuchAtom\")", ";;             (\"@item\" \"NoSuchAtom\")")
   Call: (272) [apply] apply:maplist_([1673, 0], _321122, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1673, 0], [_359118|_359120], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1673, _359118)
^  Unify: (273) [user] mfix_vars1(1673, _359118)
   Call: (274) [system] var(1673)
^  Redo: (273) [user] mfix_vars1(1673, _359118)
^  Unify: (273) [user] mfix_vars1(1673, '$VAR'(_363764))
   Call: (274) [system] atom(1673)
^  Redo: (273) [user] mfix_vars1(1673, _359118)
^  Unify: (273) [user] mfix_vars1(1673, _359118)
   Call: (274) [system] 1673==true
^  Redo: (273) [user] mfix_vars1(1673, _359118)
^  Unify: (273) [user] mfix_vars1(1673, _359118)
   Call: (274) [system] 1673==false
^  Redo: (273) [user] mfix_vars1(1673, _359118)
^  Unify: (273) [user] mfix_vars1(1673, _359118)
   Call: (274) [system] 1673==[_373044, _373050]
^  Redo: (273) [user] mfix_vars1(1673, _359118)
^  Unify: (273) [user] mfix_vars1(1673, _359118)
   Call: (274) [system] is_list(1673)
^  Redo: (273) [user] mfix_vars1(1673, _359118)
^  Unify: (273) [user] mfix_vars1(1673, _359118)
   Call: (274) [system] string(1673)
^  Redo: (273) [user] mfix_vars1(1673, _359118)
^  Unify: (273) [user] mfix_vars1(1673, _359118)
   Call: (274) [system] compound(1673)
^  Redo: (273) [user] mfix_vars1(1673, _359118)
^  Unify: (273) [user] mfix_vars1(1673, _359118)
^  Call: (274) [user] symbol(1673)
^  Unify: (274) [user] symbol(1673)
   Call: (275) [system] atom(1673)
   Fail: (275) [system] atom(1673)
^  Fail: (274) [user] symbol(1673)
^  Redo: (273) [user] mfix_vars1(1673, _359118)
   Call: (274) [system] 1673=_359118
   Exit: (274) [system] 1673=1673
^  Exit: (273) [user] mfix_vars1(1673, 1673)
   Call: (273) [apply] apply:maplist_([0], _359120, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_393444|_393446], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _393444)
^  Unify: (274) [user] mfix_vars1(0, _393444)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _393444)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_398090))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _393444)
^  Unify: (274) [user] mfix_vars1(0, _393444)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _393444)
^  Unify: (274) [user] mfix_vars1(0, _393444)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _393444)
^  Unify: (274) [user] mfix_vars1(0, _393444)
   Call: (275) [system] 0==[_407370, _407376]
^  Redo: (274) [user] mfix_vars1(0, _393444)
^  Unify: (274) [user] mfix_vars1(0, _393444)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _393444)
^  Unify: (274) [user] mfix_vars1(0, _393444)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _393444)
^  Unify: (274) [user] mfix_vars1(0, _393444)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _393444)
^  Unify: (274) [user] mfix_vars1(0, _393444)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _393444)
   Call: (275) [system] 0=_393444
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _393446, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1673, 0], [1673, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@item\" \"NoSuchAtom\")", 1673, 0], [";;             (\"@item\" \"NoSuchAtom\")", 1673, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@item\" \"NoSuchAtom\")", 1673, 0], [";;             (\"@item\" \"NoSuchAtom\")", 1673, 0])
   Call: (270) [system] compound_name_arguments(_287618, '$COMMENT', [";;             (\"@item\" \"NoSuchAtom\")", 1673, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT', [";;             (\"@item\" \"NoSuchAtom\")", 1673, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0)\=@='$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _282032)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _443618))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _443618))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _443618))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _443618))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _443618)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _443618)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _449204))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _449204))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _449204)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _449204)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _449204)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0)\=@='$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _443618)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _276420))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _276420))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _276420))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _276420))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _276420)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _276420)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _471524))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _471524))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _471524)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _471524)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _471524)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0)\=@='$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _276420)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0)\=@='$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _500302, [], _500304)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _500302, [], _500304)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _500302, [], _500304)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _500302, [], _500304)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _500302, [], _500304)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), _509618, _509620)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT', [";;             (\"@item\" \"NoSuchAtom\")", 1673, 0])
^  Call: (258) [user] subst_vars([";;             (\"@item\" \"NoSuchAtom\")", 1673, 0], _511504, [], _500304)
^  Unify: (258) [user] subst_vars([";;             (\"@item\" \"NoSuchAtom\")", 1673, 0], [";;             (\"@item\" \"NoSuchAtom\")", 1673, 0], [], [])
   Call: (259) [system] var([";;             (\"@item\" \"NoSuchAtom\")", 1673, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@item\" \"NoSuchAtom\")", 1673, 0], _511504, [], _500304)
^  Unify: (258) [user] subst_vars([";;             (\"@item\" \"NoSuchAtom\")", 1673, 0], [_515240|_515242], [], _500304)
^  Call: (259) [user] subst_vars(";;             (\"@item\" \"NoSuchAtom\")", _515240, [], _516180)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" \"NoSuchAtom\")", ";;             (\"@item\" \"NoSuchAtom\")", [], [])
   Call: (260) [system] var(";;             (\"@item\" \"NoSuchAtom\")")
^  Redo: (259) [user] subst_vars(";;             (\"@item\" \"NoSuchAtom\")", _515240, [], _516180)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" \"NoSuchAtom\")", _515240, [], _516180)
   Call: (260) [system] atom(";;             (\"@item\" \"NoSuchAtom\")")
^  Redo: (259) [user] subst_vars(";;             (\"@item\" \"NoSuchAtom\")", _515240, [], _516180)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" \"NoSuchAtom\")", _515240, [], _516180)
   Call: (260) [system] compound(";;             (\"@item\" \"NoSuchAtom\")")
^  Redo: (259) [user] subst_vars(";;             (\"@item\" \"NoSuchAtom\")", _5974, [], _5978)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" \"NoSuchAtom\")", ";;             (\"@item\" \"NoSuchAtom\")", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@item\" \"NoSuchAtom\")", ";;             (\"@item\" \"NoSuchAtom\")", [], [])
^  Call: (259) [user] subst_vars([1673, 0], _5976, [], _5946)
^  Unify: (259) [user] subst_vars([1673, 0], [1673, 0], [], [])
   Call: (260) [system] var([1673, 0])
^  Redo: (259) [user] subst_vars([1673, 0], _5976, [], _5946)
^  Unify: (259) [user] subst_vars([1673, 0], [_13154|_13156], [], _5946)
^  Call: (260) [user] subst_vars(1673, _13154, [], _14094)
^  Unify: (260) [user] subst_vars(1673, 1673, [], [])
   Call: (261) [system] var(1673)
^  Redo: (260) [user] subst_vars(1673, _13154, [], _14094)
^  Unify: (260) [user] subst_vars(1673, _13154, [], _14094)
   Call: (261) [system] atom(1673)
^  Redo: (260) [user] subst_vars(1673, _13154, [], _14094)
^  Unify: (260) [user] subst_vars(1673, _13154, [], _14094)
   Call: (261) [system] compound(1673)
^  Redo: (260) [user] subst_vars(1673, _13154, [], _14094)
^  Unify: (260) [user] subst_vars(1673, 1673, [], [])
^  Exit: (260) [user] subst_vars(1673, 1673, [], [])
^  Call: (260) [user] subst_vars([0], _13156, [], _5946)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _13156, [], _5946)
^  Unify: (260) [user] subst_vars([0], [_29026|_29028], [], _5946)
^  Call: (261) [user] subst_vars(0, _29026, [], _29966)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _29026, [], _29966)
^  Unify: (261) [user] subst_vars(0, _29026, [], _29966)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _29026, [], _29966)
^  Unify: (261) [user] subst_vars(0, _29026, [], _29966)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _29026, [], _29966)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _29028, [], _5946)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _29028, [], _5946)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1673, 0], [1673, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@item\" \"NoSuchAtom\")", 1673, 0], [";;             (\"@item\" \"NoSuchAtom\")", 1673, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5944, '$COMMENT', [";;             (\"@item\" \"NoSuchAtom\")", 1673, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT', [";;             (\"@item\" \"NoSuchAtom\")", 1673, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), [], [])
   Call: (257) [system] _52384=metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"NoSuchAtom\")", 1673, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1674, 0, 60024, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$stream_position'(60024, 1674, 0, 60058)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _105108))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _105108))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _105108)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _105108)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _105108)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _105108)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _110720))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _110720))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _110720))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _110720))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _110720)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _110720)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _116306))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _116306))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _116306)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _116306)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _116306)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _116306)
   Call: (270) [system] var('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _116306)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$VAR'(_123766))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _116306)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _116306)
   Call: (270) [system] '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _116306)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _116306)
   Call: (270) [system] '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _116306)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _116306)
   Call: (270) [system] '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0)==[_133046, _133052]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _116306)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _116306)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _116306)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _116306)
   Call: (270) [system] string('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _116306)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _116306)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _143248, _143250)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT', [";;             (\"@kind\" \"atom\")", 1674, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@kind\" \"atom\")", 1674, 0], _146990)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@kind\" \"atom\")", 1674, 0], _146990)
   Call: (271) [apply] apply:maplist_([";;             (\"@kind\" \"atom\")", 1674, 0], _146990, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@kind\" \"atom\")", 1674, 0], [_149808|_149810], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _149808)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _149808)
   Call: (273) [system] var(";;             (\"@kind\" \"atom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _149808)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", '$VAR'(_154454))
   Call: (273) [system] atom(";;             (\"@kind\" \"atom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _149808)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _149808)
   Call: (273) [system] ";;             (\"@kind\" \"atom\")"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _149808)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _149808)
   Call: (273) [system] ";;             (\"@kind\" \"atom\")"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _149808)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _149808)
   Call: (273) [system] ";;             (\"@kind\" \"atom\")"==[_163734, _163740]
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _149808)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _149808)
   Call: (273) [system] is_list(";;             (\"@kind\" \"atom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _149808)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _149808)
   Call: (273) [system] string(";;             (\"@kind\" \"atom\")")
   Exit: (273) [system] string(";;             (\"@kind\" \"atom\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _149808)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _149808)
   Call: (273) [system] compound(";;             (\"@kind\" \"atom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _149808)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _149808)
^  Call: (273) [user] symbol(";;             (\"@kind\" \"atom\")")
^  Unify: (273) [user] symbol(";;             (\"@kind\" \"atom\")")
   Call: (274) [system] atom(";;             (\"@kind\" \"atom\")")
   Fail: (274) [system] atom(";;             (\"@kind\" \"atom\")")
^  Fail: (273) [user] symbol(";;             (\"@kind\" \"atom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _149808)
   Call: (273) [system] ";;             (\"@kind\" \"atom\")"=_149808
   Exit: (273) [system] ";;             (\"@kind\" \"atom\")"=";;             (\"@kind\" \"atom\")"
^  Exit: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", ";;             (\"@kind\" \"atom\")")
   Call: (272) [apply] apply:maplist_([1674, 0], _149810, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1674, 0], [_187806|_187808], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1674, _187806)
^  Unify: (273) [user] mfix_vars1(1674, _187806)
   Call: (274) [system] var(1674)
^  Redo: (273) [user] mfix_vars1(1674, _187806)
^  Unify: (273) [user] mfix_vars1(1674, '$VAR'(_192452))
   Call: (274) [system] atom(1674)
^  Redo: (273) [user] mfix_vars1(1674, _187806)
^  Unify: (273) [user] mfix_vars1(1674, _187806)
   Call: (274) [system] 1674==true
^  Redo: (273) [user] mfix_vars1(1674, _187806)
^  Unify: (273) [user] mfix_vars1(1674, _187806)
   Call: (274) [system] 1674==false
^  Redo: (273) [user] mfix_vars1(1674, _187806)
^  Unify: (273) [user] mfix_vars1(1674, _187806)
   Call: (274) [system] 1674==[_201732, _201738]
^  Redo: (273) [user] mfix_vars1(1674, _187806)
^  Unify: (273) [user] mfix_vars1(1674, _187806)
   Call: (274) [system] is_list(1674)
^  Redo: (273) [user] mfix_vars1(1674, _187806)
^  Unify: (273) [user] mfix_vars1(1674, _187806)
   Call: (274) [system] string(1674)
^  Redo: (273) [user] mfix_vars1(1674, _187806)
^  Unify: (273) [user] mfix_vars1(1674, _187806)
   Call: (274) [system] compound(1674)
^  Redo: (273) [user] mfix_vars1(1674, _187806)
^  Unify: (273) [user] mfix_vars1(1674, _187806)
^  Call: (274) [user] symbol(1674)
^  Unify: (274) [user] symbol(1674)
   Call: (275) [system] atom(1674)
   Fail: (275) [system] atom(1674)
^  Fail: (274) [user] symbol(1674)
^  Redo: (273) [user] mfix_vars1(1674, _187806)
   Call: (274) [system] 1674=_187806
   Exit: (274) [system] 1674=1674
^  Exit: (273) [user] mfix_vars1(1674, 1674)
   Call: (273) [apply] apply:maplist_([0], _187808, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_222132|_222134], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _222132)
^  Unify: (274) [user] mfix_vars1(0, _222132)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _222132)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_226778))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _222132)
^  Unify: (274) [user] mfix_vars1(0, _222132)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _222132)
^  Unify: (274) [user] mfix_vars1(0, _222132)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _222132)
^  Unify: (274) [user] mfix_vars1(0, _222132)
   Call: (275) [system] 0==[_236058, _236064]
^  Redo: (274) [user] mfix_vars1(0, _222132)
^  Unify: (274) [user] mfix_vars1(0, _222132)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _222132)
^  Unify: (274) [user] mfix_vars1(0, _222132)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _222132)
^  Unify: (274) [user] mfix_vars1(0, _222132)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _222132)
^  Unify: (274) [user] mfix_vars1(0, _222132)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _222132)
   Call: (275) [system] 0=_222132
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _222134, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1674, 0], [1674, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@kind\" \"atom\")", 1674, 0], [";;             (\"@kind\" \"atom\")", 1674, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@kind\" \"atom\")", 1674, 0], [";;             (\"@kind\" \"atom\")", 1674, 0])
   Call: (270) [system] compound_name_arguments(_116306, '$COMMENT', [";;             (\"@kind\" \"atom\")", 1674, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT', [";;             (\"@kind\" \"atom\")", 1674, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0)\=@='$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _110720)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _272306))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _272306))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _272306))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _272306))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _272306)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _272306)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _277892))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _277892))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _277892)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _277892)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _277892)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0)\=@='$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _272306)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _105108))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _105108))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _105108))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _105108))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _105108)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _105108)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _300212))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _300212))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _300212)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _300212)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _300212)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0)\=@='$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _105108)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0)\=@='$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _328990, [], _328992)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _328990, [], _328992)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _328990, [], _328992)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _328990, [], _328992)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _328990, [], _328992)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), _338306, _338308)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT', [";;             (\"@kind\" \"atom\")", 1674, 0])
^  Call: (258) [user] subst_vars([";;             (\"@kind\" \"atom\")", 1674, 0], _340192, [], _328992)
^  Unify: (258) [user] subst_vars([";;             (\"@kind\" \"atom\")", 1674, 0], [";;             (\"@kind\" \"atom\")", 1674, 0], [], [])
   Call: (259) [system] var([";;             (\"@kind\" \"atom\")", 1674, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@kind\" \"atom\")", 1674, 0], _340192, [], _328992)
^  Unify: (258) [user] subst_vars([";;             (\"@kind\" \"atom\")", 1674, 0], [_343928|_343930], [], _328992)
^  Call: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", _343928, [], _344868)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", ";;             (\"@kind\" \"atom\")", [], [])
   Call: (260) [system] var(";;             (\"@kind\" \"atom\")")
^  Redo: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", _343928, [], _344868)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", _343928, [], _344868)
   Call: (260) [system] atom(";;             (\"@kind\" \"atom\")")
^  Redo: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", _343928, [], _344868)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", _343928, [], _344868)
   Call: (260) [system] compound(";;             (\"@kind\" \"atom\")")
^  Redo: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", _343928, [], _344868)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", ";;             (\"@kind\" \"atom\")", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", ";;             (\"@kind\" \"atom\")", [], [])
^  Call: (259) [user] subst_vars([1674, 0], _343930, [], _328992)
^  Unify: (259) [user] subst_vars([1674, 0], [1674, 0], [], [])
   Call: (260) [system] var([1674, 0])
^  Redo: (259) [user] subst_vars([1674, 0], _343930, [], _328992)
^  Unify: (259) [user] subst_vars([1674, 0], [_359800|_359802], [], _328992)
^  Call: (260) [user] subst_vars(1674, _359800, [], _360740)
^  Unify: (260) [user] subst_vars(1674, 1674, [], [])
   Call: (261) [system] var(1674)
^  Redo: (260) [user] subst_vars(1674, _359800, [], _360740)
^  Unify: (260) [user] subst_vars(1674, _359800, [], _360740)
   Call: (261) [system] atom(1674)
^  Redo: (260) [user] subst_vars(1674, _359800, [], _360740)
^  Unify: (260) [user] subst_vars(1674, _359800, [], _360740)
   Call: (261) [system] compound(1674)
^  Redo: (260) [user] subst_vars(1674, _359800, [], _360740)
^  Unify: (260) [user] subst_vars(1674, 1674, [], [])
^  Exit: (260) [user] subst_vars(1674, 1674, [], [])
^  Call: (260) [user] subst_vars([0], _359802, [], _328992)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _359802, [], _328992)
^  Unify: (260) [user] subst_vars([0], [_375672|_375674], [], _328992)
^  Call: (261) [user] subst_vars(0, _375672, [], _376612)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _375672, [], _376612)
^  Unify: (261) [user] subst_vars(0, _375672, [], _376612)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _375672, [], _376612)
^  Unify: (261) [user] subst_vars(0, _375672, [], _376612)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _375672, [], _376612)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _375674, [], _328992)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _375674, [], _328992)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1674, 0], [1674, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@kind\" \"atom\")", 1674, 0], [";;             (\"@kind\" \"atom\")", 1674, 0], [], [])
   Call: (258) [system] compound_name_arguments(_328990, '$COMMENT', [";;             (\"@kind\" \"atom\")", 1674, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT', [";;             (\"@kind\" \"atom\")", 1674, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), [], [])
   Call: (257) [system] _399030=metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1674, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1675, 0, 60056, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$stream_position'(60056, 1675, 0, 60090)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _451754))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _451754))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _451754)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _451754)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _451754)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _451754)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _457366))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _457366))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _457366))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _457366))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _457366)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _457366)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _462952))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _462952))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _462952)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _462952)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _462952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _462952)
   Call: (270) [system] var('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _462952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$VAR'(_470412))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _462952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _462952)
   Call: (270) [system] '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _462952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _462952)
   Call: (270) [system] '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _462952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _462952)
   Call: (270) [system] '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0)==[_479692, _479698]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _462952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _462952)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _462952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _462952)
   Call: (270) [system] string('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _462952)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _462952)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _489894, _489896)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT', [";;             (\"@type\" \"%Undefined%\")", 1675, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@type\" \"%Undefined%\")", 1675, 0], _493636)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@type\" \"%Undefined%\")", 1675, 0], _493636)
   Call: (271) [apply] apply:maplist_([";;             (\"@type\" \"%Undefined%\")", 1675, 0], _493636, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@type\" \"%Undefined%\")", 1675, 0], [_496454|_496456], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _496454)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _496454)
   Call: (273) [system] var(";;             (\"@type\" \"%Undefined%\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _496454)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", '$VAR'(_501100))
   Call: (273) [system] atom(";;             (\"@type\" \"%Undefined%\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _496454)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _496454)
   Call: (273) [system] ";;             (\"@type\" \"%Undefined%\")"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _496454)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _496454)
   Call: (273) [system] ";;             (\"@type\" \"%Undefined%\")"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _496454)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _496454)
   Call: (273) [system] ";;             (\"@type\" \"%Undefined%\")"==[_510380, _510386]
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _496454)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _496454)
   Call: (273) [system] is_list(";;             (\"@type\" \"%Undefined%\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _496454)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _496454)
   Call: (273) [system] string(";;             (\"@type\" \"%Undefined%\")")
   Exit: (273) [system] string(";;             (\"@type\" \"%Undefined%\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _496454)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _496454)
   Call: (273) [system] compound(";;             (\"@type\" \"%Undefined%\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _6030)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _6030)
^  Call: (273) [user] symbol(";;             (\"@type\" \"%Undefined%\")")
^  Unify: (273) [user] symbol(";;             (\"@type\" \"%Undefined%\")")
   Call: (274) [system] atom(";;             (\"@type\" \"%Undefined%\")")
   Fail: (274) [system] atom(";;             (\"@type\" \"%Undefined%\")")
^  Fail: (273) [user] symbol(";;             (\"@type\" \"%Undefined%\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _6030)
   Call: (273) [system] ";;             (\"@type\" \"%Undefined%\")"=_6030
   Exit: (273) [system] ";;             (\"@type\" \"%Undefined%\")"=";;             (\"@type\" \"%Undefined%\")"
^  Exit: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", ";;             (\"@type\" \"%Undefined%\")")
   Call: (272) [apply] apply:maplist_([1675, 0], _6032, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1675, 0], [_16580|_16582], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1675, _16580)
^  Unify: (273) [user] mfix_vars1(1675, _16580)
   Call: (274) [system] var(1675)
^  Redo: (273) [user] mfix_vars1(1675, _16580)
^  Unify: (273) [user] mfix_vars1(1675, '$VAR'(_21226))
   Call: (274) [system] atom(1675)
^  Redo: (273) [user] mfix_vars1(1675, _16580)
^  Unify: (273) [user] mfix_vars1(1675, _16580)
   Call: (274) [system] 1675==true
^  Redo: (273) [user] mfix_vars1(1675, _16580)
^  Unify: (273) [user] mfix_vars1(1675, _16580)
   Call: (274) [system] 1675==false
^  Redo: (273) [user] mfix_vars1(1675, _16580)
^  Unify: (273) [user] mfix_vars1(1675, _16580)
   Call: (274) [system] 1675==[_30506, _30512]
^  Redo: (273) [user] mfix_vars1(1675, _16580)
^  Unify: (273) [user] mfix_vars1(1675, _16580)
   Call: (274) [system] is_list(1675)
^  Redo: (273) [user] mfix_vars1(1675, _16580)
^  Unify: (273) [user] mfix_vars1(1675, _16580)
   Call: (274) [system] string(1675)
^  Redo: (273) [user] mfix_vars1(1675, _16580)
^  Unify: (273) [user] mfix_vars1(1675, _16580)
   Call: (274) [system] compound(1675)
^  Redo: (273) [user] mfix_vars1(1675, _16580)
^  Unify: (273) [user] mfix_vars1(1675, _16580)
^  Call: (274) [user] symbol(1675)
^  Unify: (274) [user] symbol(1675)
   Call: (275) [system] atom(1675)
   Fail: (275) [system] atom(1675)
^  Fail: (274) [user] symbol(1675)
^  Redo: (273) [user] mfix_vars1(1675, _16580)
   Call: (274) [system] 1675=_16580
   Exit: (274) [system] 1675=1675
^  Exit: (273) [user] mfix_vars1(1675, 1675)
   Call: (273) [apply] apply:maplist_([0], _16582, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_50906|_50908], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _50906)
^  Unify: (274) [user] mfix_vars1(0, _50906)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _50906)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_55552))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _50906)
^  Unify: (274) [user] mfix_vars1(0, _50906)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _50906)
^  Unify: (274) [user] mfix_vars1(0, _50906)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _50906)
^  Unify: (274) [user] mfix_vars1(0, _50906)
   Call: (275) [system] 0==[_64832, _64838]
^  Redo: (274) [user] mfix_vars1(0, _50906)
^  Unify: (274) [user] mfix_vars1(0, _50906)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _50906)
^  Unify: (274) [user] mfix_vars1(0, _50906)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _50906)
^  Unify: (274) [user] mfix_vars1(0, _50906)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _50906)
^  Unify: (274) [user] mfix_vars1(0, _50906)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _50906)
   Call: (275) [system] 0=_50906
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _50908, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1675, 0], [1675, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@type\" \"%Undefined%\")", 1675, 0], [";;             (\"@type\" \"%Undefined%\")", 1675, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@type\" \"%Undefined%\")", 1675, 0], [";;             (\"@type\" \"%Undefined%\")", 1675, 0])
   Call: (270) [system] compound_name_arguments(_5984, '$COMMENT', [";;             (\"@type\" \"%Undefined%\")", 1675, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT', [";;             (\"@type\" \"%Undefined%\")", 1675, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0)\=@='$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _5970)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _101080))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _101080))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _101080))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _101080))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _101080)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _101080)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _106666))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _106666))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _106666)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _106666)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _106666)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0)\=@='$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _101080)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _128986))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _128986))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _128986)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _128986)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _128986)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0)\=@='$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0)\=@='$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _157764, [], _157766)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _157764, [], _157766)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _157764, [], _157766)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _157764, [], _157766)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _157764, [], _157766)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), _167080, _167082)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT', [";;             (\"@type\" \"%Undefined%\")", 1675, 0])
^  Call: (258) [user] subst_vars([";;             (\"@type\" \"%Undefined%\")", 1675, 0], _168966, [], _157766)
^  Unify: (258) [user] subst_vars([";;             (\"@type\" \"%Undefined%\")", 1675, 0], [";;             (\"@type\" \"%Undefined%\")", 1675, 0], [], [])
   Call: (259) [system] var([";;             (\"@type\" \"%Undefined%\")", 1675, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@type\" \"%Undefined%\")", 1675, 0], _168966, [], _157766)
^  Unify: (258) [user] subst_vars([";;             (\"@type\" \"%Undefined%\")", 1675, 0], [_172702|_172704], [], _157766)
^  Call: (259) [user] subst_vars(";;             (\"@type\" \"%Undefined%\")", _172702, [], _173642)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" \"%Undefined%\")", ";;             (\"@type\" \"%Undefined%\")", [], [])
   Call: (260) [system] var(";;             (\"@type\" \"%Undefined%\")")
^  Redo: (259) [user] subst_vars(";;             (\"@type\" \"%Undefined%\")", _172702, [], _173642)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" \"%Undefined%\")", _172702, [], _173642)
   Call: (260) [system] atom(";;             (\"@type\" \"%Undefined%\")")
^  Redo: (259) [user] subst_vars(";;             (\"@type\" \"%Undefined%\")", _172702, [], _173642)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" \"%Undefined%\")", _172702, [], _173642)
   Call: (260) [system] compound(";;             (\"@type\" \"%Undefined%\")")
^  Redo: (259) [user] subst_vars(";;             (\"@type\" \"%Undefined%\")", _172702, [], _173642)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" \"%Undefined%\")", ";;             (\"@type\" \"%Undefined%\")", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@type\" \"%Undefined%\")", ";;             (\"@type\" \"%Undefined%\")", [], [])
^  Call: (259) [user] subst_vars([1675, 0], _172704, [], _157766)
^  Unify: (259) [user] subst_vars([1675, 0], [1675, 0], [], [])
   Call: (260) [system] var([1675, 0])
^  Redo: (259) [user] subst_vars([1675, 0], _172704, [], _157766)
^  Unify: (259) [user] subst_vars([1675, 0], [_188574|_188576], [], _157766)
^  Call: (260) [user] subst_vars(1675, _188574, [], _189514)
^  Unify: (260) [user] subst_vars(1675, 1675, [], [])
   Call: (261) [system] var(1675)
^  Redo: (260) [user] subst_vars(1675, _188574, [], _189514)
^  Unify: (260) [user] subst_vars(1675, _188574, [], _189514)
   Call: (261) [system] atom(1675)
^  Redo: (260) [user] subst_vars(1675, _188574, [], _189514)
^  Unify: (260) [user] subst_vars(1675, _188574, [], _189514)
   Call: (261) [system] compound(1675)
^  Redo: (260) [user] subst_vars(1675, _188574, [], _189514)
^  Unify: (260) [user] subst_vars(1675, 1675, [], [])
^  Exit: (260) [user] subst_vars(1675, 1675, [], [])
^  Call: (260) [user] subst_vars([0], _188576, [], _157766)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _188576, [], _157766)
^  Unify: (260) [user] subst_vars([0], [_204446|_204448], [], _157766)
^  Call: (261) [user] subst_vars(0, _204446, [], _205386)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _204446, [], _205386)
^  Unify: (261) [user] subst_vars(0, _204446, [], _205386)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _204446, [], _205386)
^  Unify: (261) [user] subst_vars(0, _204446, [], _205386)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _204446, [], _205386)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _204448, [], _157766)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _204448, [], _157766)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1675, 0], [1675, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@type\" \"%Undefined%\")", 1675, 0], [";;             (\"@type\" \"%Undefined%\")", 1675, 0], [], [])
   Call: (258) [system] compound_name_arguments(_157764, '$COMMENT', [";;             (\"@type\" \"%Undefined%\")", 1675, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT', [";;             (\"@type\" \"%Undefined%\")", 1675, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), [], [])
   Call: (257) [system] _227804=metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1675, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1676, 0, 60095, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$stream_position'(60095, 1676, 0, 60129)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _280536))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _280536))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _280536)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _280536)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _280536)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _280536)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _286148))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _286148))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _286148))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _286148))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _286148)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _286148)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _291734))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _291734))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _291734)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _291734)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _291734)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _291734)
   Call: (270) [system] var('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _291734)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$VAR'(_299194))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _291734)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _291734)
   Call: (270) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _291734)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _291734)
   Call: (270) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _291734)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _291734)
   Call: (270) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0)==[_308474, _308480]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _291734)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _291734)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _291734)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _291734)
   Call: (270) [system] string('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _291734)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _291734)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _318676, _318678)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0], _322418)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0], _322418)
   Call: (271) [apply] apply:maplist_([";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0], _322418, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0], [_325236|_325238], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _325236)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _325236)
   Call: (273) [system] var(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _325236)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", '$VAR'(_329882))
   Call: (273) [system] atom(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _325236)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _325236)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _325236)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _325236)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _325236)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _325236)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],"==[_339162, _339168]
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _325236)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _325236)
   Call: (273) [system] is_list(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _325236)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _325236)
   Call: (273) [system] string(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
   Exit: (273) [system] string(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _325236)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _325236)
   Call: (273) [system] compound(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _325236)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _325236)
^  Call: (273) [user] symbol(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
^  Unify: (273) [user] symbol(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
   Call: (274) [system] atom(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
   Fail: (274) [system] atom(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
^  Fail: (273) [user] symbol(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _325236)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],"=_325236
   Exit: (273) [system] ";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],"=";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],"
^  Exit: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", ";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
   Call: (272) [apply] apply:maplist_([1676, 0], _325238, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1676, 0], [_363234|_363236], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1676, _363234)
^  Unify: (273) [user] mfix_vars1(1676, _363234)
   Call: (274) [system] var(1676)
^  Redo: (273) [user] mfix_vars1(1676, _363234)
^  Unify: (273) [user] mfix_vars1(1676, '$VAR'(_367880))
   Call: (274) [system] atom(1676)
^  Redo: (273) [user] mfix_vars1(1676, _363234)
^  Unify: (273) [user] mfix_vars1(1676, _363234)
   Call: (274) [system] 1676==true
^  Redo: (273) [user] mfix_vars1(1676, _363234)
^  Unify: (273) [user] mfix_vars1(1676, _363234)
   Call: (274) [system] 1676==false
^  Redo: (273) [user] mfix_vars1(1676, _363234)
^  Unify: (273) [user] mfix_vars1(1676, _363234)
   Call: (274) [system] 1676==[_377160, _377166]
^  Redo: (273) [user] mfix_vars1(1676, _363234)
^  Unify: (273) [user] mfix_vars1(1676, _363234)
   Call: (274) [system] is_list(1676)
^  Redo: (273) [user] mfix_vars1(1676, _363234)
^  Unify: (273) [user] mfix_vars1(1676, _363234)
   Call: (274) [system] string(1676)
^  Redo: (273) [user] mfix_vars1(1676, _363234)
^  Unify: (273) [user] mfix_vars1(1676, _363234)
   Call: (274) [system] compound(1676)
^  Redo: (273) [user] mfix_vars1(1676, _363234)
^  Unify: (273) [user] mfix_vars1(1676, _363234)
^  Call: (274) [user] symbol(1676)
^  Unify: (274) [user] symbol(1676)
   Call: (275) [system] atom(1676)
   Fail: (275) [system] atom(1676)
^  Fail: (274) [user] symbol(1676)
^  Redo: (273) [user] mfix_vars1(1676, _363234)
   Call: (274) [system] 1676=_363234
   Exit: (274) [system] 1676=1676
^  Exit: (273) [user] mfix_vars1(1676, 1676)
   Call: (273) [apply] apply:maplist_([0], _363236, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_397560|_397562], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _397560)
^  Unify: (274) [user] mfix_vars1(0, _397560)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _397560)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_402206))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _397560)
^  Unify: (274) [user] mfix_vars1(0, _397560)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _397560)
^  Unify: (274) [user] mfix_vars1(0, _397560)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _397560)
^  Unify: (274) [user] mfix_vars1(0, _397560)
   Call: (275) [system] 0==[_411486, _411492]
^  Redo: (274) [user] mfix_vars1(0, _397560)
^  Unify: (274) [user] mfix_vars1(0, _397560)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _397560)
^  Unify: (274) [user] mfix_vars1(0, _397560)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _397560)
^  Unify: (274) [user] mfix_vars1(0, _397560)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _397560)
^  Unify: (274) [user] mfix_vars1(0, _397560)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _397560)
   Call: (275) [system] 0=_397560
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _397562, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1676, 0], [1676, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0], [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0], [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0])
   Call: (270) [system] compound_name_arguments(_291734, '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _286148)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _447734))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _447734))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _447734))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _447734))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _447734)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _447734)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _453320))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _453320))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _453320)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _453320)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _453320)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _447734)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _280536))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _280536))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _280536))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _280536))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _280536)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _280536)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _475640))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _475640))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _475640)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _475640)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _475640)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _280536)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _504418, [], _504420)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _504418, [], _504420)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _504418, [], _504420)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _504418, [], _504420)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _504418, [], _504420)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), _513734, _513736)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0])
^  Call: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0], _515620, [], _504420)
^  Unify: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0], [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0], [], [])
   Call: (259) [system] var([";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0], _515620, [], _504420)
^  Unify: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0], [_519356|_519358], [], _504420)
^  Call: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _519356, [], _520296)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", ";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", [], [])
   Call: (260) [system] var(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
^  Redo: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _519356, [], _520296)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _5982, [], _5986)
   Call: (260) [system] atom(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
^  Redo: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _5982, [], _5986)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _5982, [], _5986)
   Call: (260) [system] compound(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
^  Redo: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _5982, [], _5986)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", ";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", ";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", [], [])
^  Call: (259) [user] subst_vars([1676, 0], _5984, [], _5954)
^  Unify: (259) [user] subst_vars([1676, 0], [1676, 0], [], [])
   Call: (260) [system] var([1676, 0])
^  Redo: (259) [user] subst_vars([1676, 0], _5984, [], _5954)
^  Unify: (259) [user] subst_vars([1676, 0], [_17130|_17132], [], _5954)
^  Call: (260) [user] subst_vars(1676, _17130, [], _18070)
^  Unify: (260) [user] subst_vars(1676, 1676, [], [])
   Call: (261) [system] var(1676)
^  Redo: (260) [user] subst_vars(1676, _17130, [], _18070)
^  Unify: (260) [user] subst_vars(1676, _17130, [], _18070)
   Call: (261) [system] atom(1676)
^  Redo: (260) [user] subst_vars(1676, _17130, [], _18070)
^  Unify: (260) [user] subst_vars(1676, _17130, [], _18070)
   Call: (261) [system] compound(1676)
^  Redo: (260) [user] subst_vars(1676, _17130, [], _18070)
^  Unify: (260) [user] subst_vars(1676, 1676, [], [])
^  Exit: (260) [user] subst_vars(1676, 1676, [], [])
^  Call: (260) [user] subst_vars([0], _17132, [], _5954)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _17132, [], _5954)
^  Unify: (260) [user] subst_vars([0], [_33002|_33004], [], _5954)
^  Call: (261) [user] subst_vars(0, _33002, [], _33942)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _33002, [], _33942)
^  Unify: (261) [user] subst_vars(0, _33002, [], _33942)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _33002, [], _33942)
^  Unify: (261) [user] subst_vars(0, _33002, [], _33942)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _33002, [], _33942)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _33004, [], _5954)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _33004, [], _5954)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1676, 0], [1676, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0], [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5952, '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), [], [])
   Call: (257) [system] _56360=metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1676, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1677, 0, 60160, '$COMMENT'(";;     ]));", 1677, 0), '$stream_position'(60160, 1677, 0, 60194)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1677, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1677, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     ]));", 1677, 0), _109078))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     ]));", 1677, 0), _109078))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     ]));", 1677, 0), _109078)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     ]));", 1677, 0), _109078)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     ]));", 1677, 0), _109078)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     ]));", 1677, 0), _109078)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     ]));", 1677, 0), _114690))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1677, 0), _114690))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1677, 0), _114690))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1677, 0), _114690))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1677, 0), _114690)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1677, 0), _114690)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     ]));", 1677, 0), _120276))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     ]));", 1677, 0), _120276))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     ]));", 1677, 0), _120276)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     ]));", 1677, 0), _120276)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1677, 0), _120276)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1677, 0), _120276)
   Call: (270) [system] var('$COMMENT'(";;     ]));", 1677, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1677, 0), _120276)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1677, 0), '$VAR'(_127736))
   Call: (270) [system] atom('$COMMENT'(";;     ]));", 1677, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1677, 0), _120276)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1677, 0), _120276)
   Call: (270) [system] '$COMMENT'(";;     ]));", 1677, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1677, 0), _120276)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1677, 0), _120276)
   Call: (270) [system] '$COMMENT'(";;     ]));", 1677, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1677, 0), _120276)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1677, 0), _120276)
   Call: (270) [system] '$COMMENT'(";;     ]));", 1677, 0)==[_137016, _137022]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1677, 0), _120276)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1677, 0), _120276)
   Call: (270) [system] is_list('$COMMENT'(";;     ]));", 1677, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1677, 0), _120276)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1677, 0), _120276)
   Call: (270) [system] string('$COMMENT'(";;     ]));", 1677, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1677, 0), _120276)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1677, 0), _120276)
   Call: (270) [system] compound('$COMMENT'(";;     ]));", 1677, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     ]));", 1677, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1677, 0), _147218, _147220)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1677, 0), '$COMMENT', [";;     ]));", 1677, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     ]));", 1677, 0], _150960)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     ]));", 1677, 0], _150960)
   Call: (271) [apply] apply:maplist_([";;     ]));", 1677, 0], _150960, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     ]));", 1677, 0], [_153778|_153780], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     ]));", _153778)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _153778)
   Call: (273) [system] var(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _153778)
^  Unify: (272) [user] mfix_vars1(";;     ]));", '$VAR'(_158424))
   Call: (273) [system] atom(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _153778)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _153778)
   Call: (273) [system] ";;     ]));"==true
^  Redo: (272) [user] mfix_vars1(";;     ]));", _153778)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _153778)
   Call: (273) [system] ";;     ]));"==false
^  Redo: (272) [user] mfix_vars1(";;     ]));", _153778)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _153778)
   Call: (273) [system] ";;     ]));"==[_167704, _167710]
^  Redo: (272) [user] mfix_vars1(";;     ]));", _153778)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _153778)
   Call: (273) [system] is_list(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _153778)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _153778)
   Call: (273) [system] string(";;     ]));")
   Exit: (273) [system] string(";;     ]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     ]));", _153778)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _153778)
   Call: (273) [system] compound(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _153778)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _153778)
^  Call: (273) [user] symbol(";;     ]));")
^  Unify: (273) [user] symbol(";;     ]));")
   Call: (274) [system] atom(";;     ]));")
   Fail: (274) [system] atom(";;     ]));")
^  Fail: (273) [user] symbol(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _153778)
   Call: (273) [system] ";;     ]));"=_153778
   Exit: (273) [system] ";;     ]));"=";;     ]));"
^  Exit: (272) [user] mfix_vars1(";;     ]));", ";;     ]));")
   Call: (272) [apply] apply:maplist_([1677, 0], _153780, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1677, 0], [_191776|_191778], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1677, _191776)
^  Unify: (273) [user] mfix_vars1(1677, _191776)
   Call: (274) [system] var(1677)
^  Redo: (273) [user] mfix_vars1(1677, _191776)
^  Unify: (273) [user] mfix_vars1(1677, '$VAR'(_196422))
   Call: (274) [system] atom(1677)
^  Redo: (273) [user] mfix_vars1(1677, _191776)
^  Unify: (273) [user] mfix_vars1(1677, _191776)
   Call: (274) [system] 1677==true
^  Redo: (273) [user] mfix_vars1(1677, _191776)
^  Unify: (273) [user] mfix_vars1(1677, _191776)
   Call: (274) [system] 1677==false
^  Redo: (273) [user] mfix_vars1(1677, _191776)
^  Unify: (273) [user] mfix_vars1(1677, _191776)
   Call: (274) [system] 1677==[_205702, _205708]
^  Redo: (273) [user] mfix_vars1(1677, _191776)
^  Unify: (273) [user] mfix_vars1(1677, _191776)
   Call: (274) [system] is_list(1677)
^  Redo: (273) [user] mfix_vars1(1677, _191776)
^  Unify: (273) [user] mfix_vars1(1677, _191776)
   Call: (274) [system] string(1677)
^  Redo: (273) [user] mfix_vars1(1677, _191776)
^  Unify: (273) [user] mfix_vars1(1677, _191776)
   Call: (274) [system] compound(1677)
^  Redo: (273) [user] mfix_vars1(1677, _191776)
^  Unify: (273) [user] mfix_vars1(1677, _191776)
^  Call: (274) [user] symbol(1677)
^  Unify: (274) [user] symbol(1677)
   Call: (275) [system] atom(1677)
   Fail: (275) [system] atom(1677)
^  Fail: (274) [user] symbol(1677)
^  Redo: (273) [user] mfix_vars1(1677, _191776)
   Call: (274) [system] 1677=_191776
   Exit: (274) [system] 1677=1677
^  Exit: (273) [user] mfix_vars1(1677, 1677)
   Call: (273) [apply] apply:maplist_([0], _191778, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_226102|_226104], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _226102)
^  Unify: (274) [user] mfix_vars1(0, _226102)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _226102)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_230748))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _226102)
^  Unify: (274) [user] mfix_vars1(0, _226102)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _226102)
^  Unify: (274) [user] mfix_vars1(0, _226102)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _226102)
^  Unify: (274) [user] mfix_vars1(0, _226102)
   Call: (275) [system] 0==[_240028, _240034]
^  Redo: (274) [user] mfix_vars1(0, _226102)
^  Unify: (274) [user] mfix_vars1(0, _226102)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _226102)
^  Unify: (274) [user] mfix_vars1(0, _226102)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _226102)
^  Unify: (274) [user] mfix_vars1(0, _226102)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _226102)
^  Unify: (274) [user] mfix_vars1(0, _226102)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _226102)
   Call: (275) [system] 0=_226102
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _226104, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1677, 0], [1677, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     ]));", 1677, 0], [";;     ]));", 1677, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     ]));", 1677, 0], [";;     ]));", 1677, 0])
   Call: (270) [system] compound_name_arguments(_120276, '$COMMENT', [";;     ]));", 1677, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1677, 0), '$COMMENT', [";;     ]));", 1677, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0)))
   Call: (267) [system] '$COMMENT'(";;     ]));", 1677, 0)\=@='$COMMENT'(";;     ]));", 1677, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1677, 0), _114690)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     ]));", 1677, 0), _276276))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1677, 0), _276276))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1677, 0), _276276))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1677, 0), _276276))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1677, 0), _276276)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1677, 0), _276276)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     ]));", 1677, 0), _281862))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     ]));", 1677, 0), _281862))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     ]));", 1677, 0), _281862)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     ]));", 1677, 0), _281862)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     ]));", 1677, 0), _281862)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0)))
   Call: (267) [system] '$COMMENT'(";;     ]));", 1677, 0)\=@='$COMMENT'(";;     ]));", 1677, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1677, 0), _276276)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     ]));", 1677, 0), _109078))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1677, 0), _109078))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1677, 0), _109078))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1677, 0), _109078))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1677, 0), _109078)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1677, 0), _109078)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     ]));", 1677, 0), _304182))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     ]));", 1677, 0), _304182))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     ]));", 1677, 0), _304182)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     ]));", 1677, 0), _304182)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     ]));", 1677, 0), _304182)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0)))
   Call: (267) [system] '$COMMENT'(";;     ]));", 1677, 0)\=@='$COMMENT'(";;     ]));", 1677, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1677, 0), _109078)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0)))
   Call: (261) [system] '$COMMENT'(";;     ]));", 1677, 0)\=@='$COMMENT'(";;     ]));", 1677, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1677, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1677, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1677, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1677, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1677, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1677, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1677, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1677, 0), _332960, [], _332962)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     ]));", 1677, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1677, 0), _332960, [], _332962)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1677, 0), _332960, [], _332962)
   Call: (258) [system] atom('$COMMENT'(";;     ]));", 1677, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1677, 0), _332960, [], _332962)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1677, 0), _332960, [], _332962)
   Call: (258) [system] compound('$COMMENT'(";;     ]));", 1677, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     ]));", 1677, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1677, 0), _342276, _342278)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1677, 0), '$COMMENT', [";;     ]));", 1677, 0])
^  Call: (258) [user] subst_vars([";;     ]));", 1677, 0], _344162, [], _332962)
^  Unify: (258) [user] subst_vars([";;     ]));", 1677, 0], [";;     ]));", 1677, 0], [], [])
   Call: (259) [system] var([";;     ]));", 1677, 0])
^  Redo: (258) [user] subst_vars([";;     ]));", 1677, 0], _344162, [], _332962)
^  Unify: (258) [user] subst_vars([";;     ]));", 1677, 0], [_347898|_347900], [], _332962)
^  Call: (259) [user] subst_vars(";;     ]));", _347898, [], _348838)
^  Unify: (259) [user] subst_vars(";;     ]));", ";;     ]));", [], [])
   Call: (260) [system] var(";;     ]));")
^  Redo: (259) [user] subst_vars(";;     ]));", _347898, [], _348838)
^  Unify: (259) [user] subst_vars(";;     ]));", _347898, [], _348838)
   Call: (260) [system] atom(";;     ]));")
^  Redo: (259) [user] subst_vars(";;     ]));", _347898, [], _348838)
^  Unify: (259) [user] subst_vars(";;     ]));", _347898, [], _348838)
   Call: (260) [system] compound(";;     ]));")
^  Redo: (259) [user] subst_vars(";;     ]));", _347898, [], _348838)
^  Unify: (259) [user] subst_vars(";;     ]));", ";;     ]));", [], [])
^  Exit: (259) [user] subst_vars(";;     ]));", ";;     ]));", [], [])
^  Call: (259) [user] subst_vars([1677, 0], _347900, [], _332962)
^  Unify: (259) [user] subst_vars([1677, 0], [1677, 0], [], [])
   Call: (260) [system] var([1677, 0])
^  Redo: (259) [user] subst_vars([1677, 0], _347900, [], _332962)
^  Unify: (259) [user] subst_vars([1677, 0], [_363770|_363772], [], _332962)
^  Call: (260) [user] subst_vars(1677, _363770, [], _364710)
^  Unify: (260) [user] subst_vars(1677, 1677, [], [])
   Call: (261) [system] var(1677)
^  Redo: (260) [user] subst_vars(1677, _363770, [], _364710)
^  Unify: (260) [user] subst_vars(1677, _363770, [], _364710)
   Call: (261) [system] atom(1677)
^  Redo: (260) [user] subst_vars(1677, _363770, [], _364710)
^  Unify: (260) [user] subst_vars(1677, _363770, [], _364710)
   Call: (261) [system] compound(1677)
^  Redo: (260) [user] subst_vars(1677, _363770, [], _364710)
^  Unify: (260) [user] subst_vars(1677, 1677, [], [])
^  Exit: (260) [user] subst_vars(1677, 1677, [], [])
^  Call: (260) [user] subst_vars([0], _363772, [], _332962)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _363772, [], _332962)
^  Unify: (260) [user] subst_vars([0], [_379642|_379644], [], _332962)
^  Call: (261) [user] subst_vars(0, _379642, [], _380582)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _379642, [], _380582)
^  Unify: (261) [user] subst_vars(0, _379642, [], _380582)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _379642, [], _380582)
^  Unify: (261) [user] subst_vars(0, _379642, [], _380582)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _379642, [], _380582)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _379644, [], _332962)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _379644, [], _332962)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1677, 0], [1677, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     ]));", 1677, 0], [";;     ]));", 1677, 0], [], [])
   Call: (258) [system] compound_name_arguments(_332960, '$COMMENT', [";;     ]));", 1677, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1677, 0), '$COMMENT', [";;     ]));", 1677, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1677, 0), '$COMMENT'(";;     ]));", 1677, 0), [], [])
   Call: (257) [system] _403000=metta_file_buffer(+, '$COMMENT'(";;     ]));", 1677, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     ]));", 1677, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     ]));", 1677, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     ]));", 1677, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     ]));", 1677, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1677, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1677, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1677, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1677, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1678, 0, 60172, '$COMMENT'(";; }", 1678, 0), '$stream_position'(60172, 1678, 0, 60206)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1678, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1678, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; }", 1678, 0), _455716))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1678, 0), _455716))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; }", 1678, 0), _455716)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1678, 0), _455716)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1678, 0), _455716)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1678, 0), _455716)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; }", 1678, 0), _461328))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1678, 0), _461328))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1678, 0), _461328))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1678, 0), _461328))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1678, 0), _461328)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1678, 0), _461328)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; }", 1678, 0), _466914))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1678, 0), _466914))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; }", 1678, 0), _466914)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1678, 0), _466914)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; }", 1678, 0), _466914)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1678, 0), _466914)
   Call: (270) [system] var('$COMMENT'(";; }", 1678, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1678, 0), _466914)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1678, 0), '$VAR'(_474374))
   Call: (270) [system] atom('$COMMENT'(";; }", 1678, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1678, 0), _466914)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1678, 0), _466914)
   Call: (270) [system] '$COMMENT'(";; }", 1678, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1678, 0), _466914)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1678, 0), _466914)
   Call: (270) [system] '$COMMENT'(";; }", 1678, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1678, 0), _466914)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1678, 0), _466914)
   Call: (270) [system] '$COMMENT'(";; }", 1678, 0)==[_483654, _483660]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1678, 0), _466914)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1678, 0), _466914)
   Call: (270) [system] is_list('$COMMENT'(";; }", 1678, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1678, 0), _466914)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1678, 0), _466914)
   Call: (270) [system] string('$COMMENT'(";; }", 1678, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1678, 0), _466914)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1678, 0), _466914)
   Call: (270) [system] compound('$COMMENT'(";; }", 1678, 0))
   Exit: (270) [system] compound('$COMMENT'(";; }", 1678, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1678, 0), _493856, _493858)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1678, 0), '$COMMENT', [";; }", 1678, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; }", 1678, 0], _497598)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1678, 0], _497598)
   Call: (271) [apply] apply:maplist_([";; }", 1678, 0], _497598, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; }", 1678, 0], [_500416|_500418], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; }", _500416)
^  Unify: (272) [user] mfix_vars1(";; }", _500416)
   Call: (273) [system] var(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _500416)
^  Unify: (272) [user] mfix_vars1(";; }", '$VAR'(_505062))
   Call: (273) [system] atom(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _500416)
^  Unify: (272) [user] mfix_vars1(";; }", _500416)
   Call: (273) [system] ";; }"==true
^  Redo: (272) [user] mfix_vars1(";; }", _500416)
^  Unify: (272) [user] mfix_vars1(";; }", _500416)
   Call: (273) [system] ";; }"==false
^  Redo: (272) [user] mfix_vars1(";; }", _500416)
^  Unify: (272) [user] mfix_vars1(";; }", _500416)
   Call: (273) [system] ";; }"==[_514342, _514348]
^  Redo: (272) [user] mfix_vars1(";; }", _500416)
^  Unify: (272) [user] mfix_vars1(";; }", _500416)
   Call: (273) [system] is_list(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _500416)
^  Unify: (272) [user] mfix_vars1(";; }", _500416)
   Call: (273) [system] string(";; }")
   Exit: (273) [system] string(";; }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; }", _6022)
^  Unify: (272) [user] mfix_vars1(";; }", _6022)
   Call: (273) [system] compound(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _6022)
^  Unify: (272) [user] mfix_vars1(";; }", _6022)
^  Call: (273) [user] symbol(";; }")
^  Unify: (273) [user] symbol(";; }")
   Call: (274) [system] atom(";; }")
   Fail: (274) [system] atom(";; }")
^  Fail: (273) [user] symbol(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _6022)
   Call: (273) [system] ";; }"=_6022
   Exit: (273) [system] ";; }"=";; }"
^  Exit: (272) [user] mfix_vars1(";; }", ";; }")
   Call: (272) [apply] apply:maplist_([1678, 0], _6024, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1678, 0], [_20520|_20522], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1678, _20520)
^  Unify: (273) [user] mfix_vars1(1678, _20520)
   Call: (274) [system] var(1678)
^  Redo: (273) [user] mfix_vars1(1678, _20520)
^  Unify: (273) [user] mfix_vars1(1678, '$VAR'(_25166))
   Call: (274) [system] atom(1678)
^  Redo: (273) [user] mfix_vars1(1678, _20520)
^  Unify: (273) [user] mfix_vars1(1678, _20520)
   Call: (274) [system] 1678==true
^  Redo: (273) [user] mfix_vars1(1678, _20520)
^  Unify: (273) [user] mfix_vars1(1678, _20520)
   Call: (274) [system] 1678==false
^  Redo: (273) [user] mfix_vars1(1678, _20520)
^  Unify: (273) [user] mfix_vars1(1678, _20520)
   Call: (274) [system] 1678==[_34446, _34452]
^  Redo: (273) [user] mfix_vars1(1678, _20520)
^  Unify: (273) [user] mfix_vars1(1678, _20520)
   Call: (274) [system] is_list(1678)
^  Redo: (273) [user] mfix_vars1(1678, _20520)
^  Unify: (273) [user] mfix_vars1(1678, _20520)
   Call: (274) [system] string(1678)
^  Redo: (273) [user] mfix_vars1(1678, _20520)
^  Unify: (273) [user] mfix_vars1(1678, _20520)
   Call: (274) [system] compound(1678)
^  Redo: (273) [user] mfix_vars1(1678, _20520)
^  Unify: (273) [user] mfix_vars1(1678, _20520)
^  Call: (274) [user] symbol(1678)
^  Unify: (274) [user] symbol(1678)
   Call: (275) [system] atom(1678)
   Fail: (275) [system] atom(1678)
^  Fail: (274) [user] symbol(1678)
^  Redo: (273) [user] mfix_vars1(1678, _20520)
   Call: (274) [system] 1678=_20520
   Exit: (274) [system] 1678=1678
^  Exit: (273) [user] mfix_vars1(1678, 1678)
   Call: (273) [apply] apply:maplist_([0], _20522, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_54846|_54848], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _54846)
^  Unify: (274) [user] mfix_vars1(0, _54846)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _54846)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_59492))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _54846)
^  Unify: (274) [user] mfix_vars1(0, _54846)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _54846)
^  Unify: (274) [user] mfix_vars1(0, _54846)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _54846)
^  Unify: (274) [user] mfix_vars1(0, _54846)
   Call: (275) [system] 0==[_68772, _68778]
^  Redo: (274) [user] mfix_vars1(0, _54846)
^  Unify: (274) [user] mfix_vars1(0, _54846)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _54846)
^  Unify: (274) [user] mfix_vars1(0, _54846)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _54846)
^  Unify: (274) [user] mfix_vars1(0, _54846)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _54846)
^  Unify: (274) [user] mfix_vars1(0, _54846)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _54846)
   Call: (275) [system] 0=_54846
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _54848, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1678, 0], [1678, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; }", 1678, 0], [";; }", 1678, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1678, 0], [";; }", 1678, 0])
   Call: (270) [system] compound_name_arguments(_5976, '$COMMENT', [";; }", 1678, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1678, 0), '$COMMENT', [";; }", 1678, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1678, 0)\=@='$COMMENT'(";; }", 1678, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1678, 0), _5962)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; }", 1678, 0), _105020))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1678, 0), _105020))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1678, 0), _105020))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1678, 0), _105020))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1678, 0), _105020)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1678, 0), _105020)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; }", 1678, 0), _110606))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1678, 0), _110606))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; }", 1678, 0), _110606)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1678, 0), _110606)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; }", 1678, 0), _110606)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1678, 0)\=@='$COMMENT'(";; }", 1678, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1678, 0), _105020)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; }", 1678, 0), _5942))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1678, 0), _5942))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1678, 0), _5942))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1678, 0), _5942))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1678, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1678, 0), _5942)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; }", 1678, 0), _132926))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1678, 0), _132926))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; }", 1678, 0), _132926)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1678, 0), _132926)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; }", 1678, 0), _132926)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1678, 0)\=@='$COMMENT'(";; }", 1678, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1678, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0)))
   Call: (261) [system] '$COMMENT'(";; }", 1678, 0)\=@='$COMMENT'(";; }", 1678, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1678, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1678, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1678, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1678, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1678, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; }", 1678, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; }", 1678, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; }", 1678, 0), _161704, [], _161706)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; }", 1678, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1678, 0), _161704, [], _161706)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1678, 0), _161704, [], _161706)
   Call: (258) [system] atom('$COMMENT'(";; }", 1678, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1678, 0), _161704, [], _161706)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1678, 0), _161704, [], _161706)
   Call: (258) [system] compound('$COMMENT'(";; }", 1678, 0))
   Exit: (258) [system] compound('$COMMENT'(";; }", 1678, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1678, 0), _171020, _171022)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1678, 0), '$COMMENT', [";; }", 1678, 0])
^  Call: (258) [user] subst_vars([";; }", 1678, 0], _172906, [], _161706)
^  Unify: (258) [user] subst_vars([";; }", 1678, 0], [";; }", 1678, 0], [], [])
   Call: (259) [system] var([";; }", 1678, 0])
^  Redo: (258) [user] subst_vars([";; }", 1678, 0], _172906, [], _161706)
^  Unify: (258) [user] subst_vars([";; }", 1678, 0], [_176642|_176644], [], _161706)
^  Call: (259) [user] subst_vars(";; }", _176642, [], _177582)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
   Call: (260) [system] var(";; }")
^  Redo: (259) [user] subst_vars(";; }", _176642, [], _177582)
^  Unify: (259) [user] subst_vars(";; }", _176642, [], _177582)
   Call: (260) [system] atom(";; }")
^  Redo: (259) [user] subst_vars(";; }", _176642, [], _177582)
^  Unify: (259) [user] subst_vars(";; }", _176642, [], _177582)
   Call: (260) [system] compound(";; }")
^  Redo: (259) [user] subst_vars(";; }", _176642, [], _177582)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Exit: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Call: (259) [user] subst_vars([1678, 0], _176644, [], _161706)
^  Unify: (259) [user] subst_vars([1678, 0], [1678, 0], [], [])
   Call: (260) [system] var([1678, 0])
^  Redo: (259) [user] subst_vars([1678, 0], _176644, [], _161706)
^  Unify: (259) [user] subst_vars([1678, 0], [_192514|_192516], [], _161706)
^  Call: (260) [user] subst_vars(1678, _192514, [], _193454)
^  Unify: (260) [user] subst_vars(1678, 1678, [], [])
   Call: (261) [system] var(1678)
^  Redo: (260) [user] subst_vars(1678, _192514, [], _193454)
^  Unify: (260) [user] subst_vars(1678, _192514, [], _193454)
   Call: (261) [system] atom(1678)
^  Redo: (260) [user] subst_vars(1678, _192514, [], _193454)
^  Unify: (260) [user] subst_vars(1678, _192514, [], _193454)
   Call: (261) [system] compound(1678)
^  Redo: (260) [user] subst_vars(1678, _192514, [], _193454)
^  Unify: (260) [user] subst_vars(1678, 1678, [], [])
^  Exit: (260) [user] subst_vars(1678, 1678, [], [])
^  Call: (260) [user] subst_vars([0], _192516, [], _161706)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _192516, [], _161706)
^  Unify: (260) [user] subst_vars([0], [_208386|_208388], [], _161706)
^  Call: (261) [user] subst_vars(0, _208386, [], _209326)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _208386, [], _209326)
^  Unify: (261) [user] subst_vars(0, _208386, [], _209326)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _208386, [], _209326)
^  Unify: (261) [user] subst_vars(0, _208386, [], _209326)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _208386, [], _209326)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _208388, [], _161706)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _208388, [], _161706)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1678, 0], [1678, 0], [], [])
^  Exit: (258) [user] subst_vars([";; }", 1678, 0], [";; }", 1678, 0], [], [])
   Call: (258) [system] compound_name_arguments(_161704, '$COMMENT', [";; }", 1678, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1678, 0), '$COMMENT', [";; }", 1678, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; }", 1678, 0), '$COMMENT'(";; }", 1678, 0), [], [])
   Call: (257) [system] _231744=metta_file_buffer(+, '$COMMENT'(";; }", 1678, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; }", 1678, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; }", 1678, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1678, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1678, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1678, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1678, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1678, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1678, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1680, 0, 60178, '$COMMENT'(";; Converted:", 1680, 0), '$stream_position'(60178, 1680, 0, 60212)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1680, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1680, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1680, 0), _284462))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1680, 0), _284462))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1680, 0), _284462)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1680, 0), _284462)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1680, 0), _284462)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1680, 0), _284462)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1680, 0), _290074))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1680, 0), _290074))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1680, 0), _290074))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1680, 0), _290074))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1680, 0), _290074)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1680, 0), _290074)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1680, 0), _295660))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1680, 0), _295660))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1680, 0), _295660)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1680, 0), _295660)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1680, 0), _295660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1680, 0), _295660)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1680, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1680, 0), _295660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1680, 0), '$VAR'(_303120))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1680, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1680, 0), _295660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1680, 0), _295660)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1680, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1680, 0), _295660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1680, 0), _295660)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1680, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1680, 0), _295660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1680, 0), _295660)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1680, 0)==[_312400, _312406]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1680, 0), _295660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1680, 0), _295660)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1680, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1680, 0), _295660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1680, 0), _295660)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1680, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1680, 0), _295660)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1680, 0), _295660)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1680, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1680, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1680, 0), _322602, _322604)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1680, 0), '$COMMENT', [";; Converted:", 1680, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1680, 0], _326344)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1680, 0], _326344)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1680, 0], _326344, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1680, 0], [_329162|_329164], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _329162)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _329162)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _329162)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_333808))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _329162)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _329162)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _329162)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _329162)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _329162)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _329162)
   Call: (273) [system] ";; Converted:"==[_343088, _343094]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _329162)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _329162)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _329162)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _329162)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _329162)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _329162)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _329162)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _329162)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _329162)
   Call: (273) [system] ";; Converted:"=_329162
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1680, 0], _329164, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1680, 0], [_367160|_367162], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1680, _367160)
^  Unify: (273) [user] mfix_vars1(1680, _367160)
   Call: (274) [system] var(1680)
^  Redo: (273) [user] mfix_vars1(1680, _367160)
^  Unify: (273) [user] mfix_vars1(1680, '$VAR'(_371806))
   Call: (274) [system] atom(1680)
^  Redo: (273) [user] mfix_vars1(1680, _367160)
^  Unify: (273) [user] mfix_vars1(1680, _367160)
   Call: (274) [system] 1680==true
^  Redo: (273) [user] mfix_vars1(1680, _367160)
^  Unify: (273) [user] mfix_vars1(1680, _367160)
   Call: (274) [system] 1680==false
^  Redo: (273) [user] mfix_vars1(1680, _367160)
^  Unify: (273) [user] mfix_vars1(1680, _367160)
   Call: (274) [system] 1680==[_381086, _381092]
^  Redo: (273) [user] mfix_vars1(1680, _367160)
^  Unify: (273) [user] mfix_vars1(1680, _367160)
   Call: (274) [system] is_list(1680)
^  Redo: (273) [user] mfix_vars1(1680, _367160)
^  Unify: (273) [user] mfix_vars1(1680, _367160)
   Call: (274) [system] string(1680)
^  Redo: (273) [user] mfix_vars1(1680, _367160)
^  Unify: (273) [user] mfix_vars1(1680, _367160)
   Call: (274) [system] compound(1680)
^  Redo: (273) [user] mfix_vars1(1680, _367160)
^  Unify: (273) [user] mfix_vars1(1680, _367160)
^  Call: (274) [user] symbol(1680)
^  Unify: (274) [user] symbol(1680)
   Call: (275) [system] atom(1680)
   Fail: (275) [system] atom(1680)
^  Fail: (274) [user] symbol(1680)
^  Redo: (273) [user] mfix_vars1(1680, _367160)
   Call: (274) [system] 1680=_367160
   Exit: (274) [system] 1680=1680
^  Exit: (273) [user] mfix_vars1(1680, 1680)
   Call: (273) [apply] apply:maplist_([0], _367162, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_401486|_401488], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _401486)
^  Unify: (274) [user] mfix_vars1(0, _401486)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _401486)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_406132))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _401486)
^  Unify: (274) [user] mfix_vars1(0, _401486)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _401486)
^  Unify: (274) [user] mfix_vars1(0, _401486)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _401486)
^  Unify: (274) [user] mfix_vars1(0, _401486)
   Call: (275) [system] 0==[_415412, _415418]
^  Redo: (274) [user] mfix_vars1(0, _401486)
^  Unify: (274) [user] mfix_vars1(0, _401486)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _401486)
^  Unify: (274) [user] mfix_vars1(0, _401486)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _401486)
^  Unify: (274) [user] mfix_vars1(0, _401486)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _401486)
^  Unify: (274) [user] mfix_vars1(0, _401486)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _401486)
   Call: (275) [system] 0=_401486
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _401488, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1680, 0], [1680, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1680, 0], [";; Converted:", 1680, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1680, 0], [";; Converted:", 1680, 0])
   Call: (270) [system] compound_name_arguments(_295660, '$COMMENT', [";; Converted:", 1680, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1680, 0), '$COMMENT', [";; Converted:", 1680, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1680, 0)\=@='$COMMENT'(";; Converted:", 1680, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1680, 0), _290074)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1680, 0), _451660))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1680, 0), _451660))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1680, 0), _451660))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1680, 0), _451660))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1680, 0), _451660)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1680, 0), _451660)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1680, 0), _457246))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1680, 0), _457246))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1680, 0), _457246)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1680, 0), _457246)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1680, 0), _457246)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1680, 0)\=@='$COMMENT'(";; Converted:", 1680, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1680, 0), _451660)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1680, 0), _284462))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1680, 0), _284462))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1680, 0), _284462))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1680, 0), _284462))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1680, 0), _284462)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1680, 0), _284462)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1680, 0), _479566))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1680, 0), _479566))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1680, 0), _479566)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1680, 0), _479566)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1680, 0), _479566)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1680, 0)\=@='$COMMENT'(";; Converted:", 1680, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1680, 0), _284462)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1680, 0)\=@='$COMMENT'(";; Converted:", 1680, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1680, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1680, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1680, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1680, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1680, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1680, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1680, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1680, 0), _508344, [], _508346)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1680, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1680, 0), _508344, [], _508346)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1680, 0), _508344, [], _508346)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1680, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1680, 0), _508344, [], _508346)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1680, 0), _508344, [], _508346)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1680, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1680, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1680, 0), _517660, _517662)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1680, 0), '$COMMENT', [";; Converted:", 1680, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1680, 0], _519546, [], _508346)
^  Unify: (258) [user] subst_vars([";; Converted:", 1680, 0], [";; Converted:", 1680, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1680, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1680, 0], _519546, [], _508346)
^  Unify: (258) [user] subst_vars([";; Converted:", 1680, 0], [_523282|_523284], [], _508346)
^  Call: (259) [user] subst_vars(";; Converted:", _5968, [], _5974)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _5968, [], _5974)
^  Unify: (259) [user] subst_vars(";; Converted:", _5968, [], _5974)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _5968, [], _5974)
^  Unify: (259) [user] subst_vars(";; Converted:", _5968, [], _5974)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _5968, [], _5974)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1680, 0], _5970, [], _5940)
^  Unify: (259) [user] subst_vars([1680, 0], [1680, 0], [], [])
   Call: (260) [system] var([1680, 0])
^  Redo: (259) [user] subst_vars([1680, 0], _5970, [], _5940)
^  Unify: (259) [user] subst_vars([1680, 0], [_20906|_20908], [], _5940)
^  Call: (260) [user] subst_vars(1680, _20906, [], _21846)
^  Unify: (260) [user] subst_vars(1680, 1680, [], [])
   Call: (261) [system] var(1680)
^  Redo: (260) [user] subst_vars(1680, _20906, [], _21846)
^  Unify: (260) [user] subst_vars(1680, _20906, [], _21846)
   Call: (261) [system] atom(1680)
^  Redo: (260) [user] subst_vars(1680, _20906, [], _21846)
^  Unify: (260) [user] subst_vars(1680, _20906, [], _21846)
   Call: (261) [system] compound(1680)
^  Redo: (260) [user] subst_vars(1680, _20906, [], _21846)
^  Unify: (260) [user] subst_vars(1680, 1680, [], [])
^  Exit: (260) [user] subst_vars(1680, 1680, [], [])
^  Call: (260) [user] subst_vars([0], _20908, [], _5940)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _20908, [], _5940)
^  Unify: (260) [user] subst_vars([0], [_36778|_36780], [], _5940)
^  Call: (261) [user] subst_vars(0, _36778, [], _37718)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _36778, [], _37718)
^  Unify: (261) [user] subst_vars(0, _36778, [], _37718)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _36778, [], _37718)
^  Unify: (261) [user] subst_vars(0, _36778, [], _37718)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _36778, [], _37718)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _36780, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _36780, [], _5940)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1680, 0], [1680, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1680, 0], [";; Converted:", 1680, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5938, '$COMMENT', [";; Converted:", 1680, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1680, 0), '$COMMENT', [";; Converted:", 1680, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1680, 0), '$COMMENT'(";; Converted:", 1680, 0), [], [])
   Call: (257) [system] _60136=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1680, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1680, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1680, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1680, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1680, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1680, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1680, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1680, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1680, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1687, 0, 60328, '$COMMENT'(";; Original:", 1687, 0), '$stream_position'(60328, 1687, 0, 60362)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1687, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1687, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1687, 0), _112854))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1687, 0), _112854))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1687, 0), _112854)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1687, 0), _112854)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1687, 0), _112854)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1687, 0), _112854)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1687, 0), _118466))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1687, 0), _118466))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1687, 0), _118466))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1687, 0), _118466))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1687, 0), _118466)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1687, 0), _118466)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1687, 0), _124052))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1687, 0), _124052))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1687, 0), _124052)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1687, 0), _124052)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1687, 0), _124052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1687, 0), _124052)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1687, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1687, 0), _124052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1687, 0), '$VAR'(_131512))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1687, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1687, 0), _124052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1687, 0), _124052)
   Call: (270) [system] '$COMMENT'(";; Original:", 1687, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1687, 0), _124052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1687, 0), _124052)
   Call: (270) [system] '$COMMENT'(";; Original:", 1687, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1687, 0), _124052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1687, 0), _124052)
   Call: (270) [system] '$COMMENT'(";; Original:", 1687, 0)==[_140792, _140798]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1687, 0), _124052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1687, 0), _124052)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1687, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1687, 0), _124052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1687, 0), _124052)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1687, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1687, 0), _124052)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1687, 0), _124052)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1687, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1687, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1687, 0), _150994, _150996)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1687, 0), '$COMMENT', [";; Original:", 1687, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1687, 0], _154736)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1687, 0], _154736)
   Call: (271) [apply] apply:maplist_([";; Original:", 1687, 0], _154736, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1687, 0], [_157554|_157556], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _157554)
^  Unify: (272) [user] mfix_vars1(";; Original:", _157554)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _157554)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_162200))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _157554)
^  Unify: (272) [user] mfix_vars1(";; Original:", _157554)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _157554)
^  Unify: (272) [user] mfix_vars1(";; Original:", _157554)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _157554)
^  Unify: (272) [user] mfix_vars1(";; Original:", _157554)
   Call: (273) [system] ";; Original:"==[_171480, _171486]
^  Redo: (272) [user] mfix_vars1(";; Original:", _157554)
^  Unify: (272) [user] mfix_vars1(";; Original:", _157554)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _157554)
^  Unify: (272) [user] mfix_vars1(";; Original:", _157554)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _157554)
^  Unify: (272) [user] mfix_vars1(";; Original:", _157554)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _157554)
^  Unify: (272) [user] mfix_vars1(";; Original:", _157554)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _157554)
   Call: (273) [system] ";; Original:"=_157554
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1687, 0], _157556, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1687, 0], [_195552|_195554], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1687, _195552)
^  Unify: (273) [user] mfix_vars1(1687, _195552)
   Call: (274) [system] var(1687)
^  Redo: (273) [user] mfix_vars1(1687, _195552)
^  Unify: (273) [user] mfix_vars1(1687, '$VAR'(_200198))
   Call: (274) [system] atom(1687)
^  Redo: (273) [user] mfix_vars1(1687, _195552)
^  Unify: (273) [user] mfix_vars1(1687, _195552)
   Call: (274) [system] 1687==true
^  Redo: (273) [user] mfix_vars1(1687, _195552)
^  Unify: (273) [user] mfix_vars1(1687, _195552)
   Call: (274) [system] 1687==false
^  Redo: (273) [user] mfix_vars1(1687, _195552)
^  Unify: (273) [user] mfix_vars1(1687, _195552)
   Call: (274) [system] 1687==[_209478, _209484]
^  Redo: (273) [user] mfix_vars1(1687, _195552)
^  Unify: (273) [user] mfix_vars1(1687, _195552)
   Call: (274) [system] is_list(1687)
^  Redo: (273) [user] mfix_vars1(1687, _195552)
^  Unify: (273) [user] mfix_vars1(1687, _195552)
   Call: (274) [system] string(1687)
^  Redo: (273) [user] mfix_vars1(1687, _195552)
^  Unify: (273) [user] mfix_vars1(1687, _195552)
   Call: (274) [system] compound(1687)
^  Redo: (273) [user] mfix_vars1(1687, _195552)
^  Unify: (273) [user] mfix_vars1(1687, _195552)
^  Call: (274) [user] symbol(1687)
^  Unify: (274) [user] symbol(1687)
   Call: (275) [system] atom(1687)
   Fail: (275) [system] atom(1687)
^  Fail: (274) [user] symbol(1687)
^  Redo: (273) [user] mfix_vars1(1687, _195552)
   Call: (274) [system] 1687=_195552
   Exit: (274) [system] 1687=1687
^  Exit: (273) [user] mfix_vars1(1687, 1687)
   Call: (273) [apply] apply:maplist_([0], _195554, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_229878|_229880], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _229878)
^  Unify: (274) [user] mfix_vars1(0, _229878)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _229878)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_234524))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _229878)
^  Unify: (274) [user] mfix_vars1(0, _229878)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _229878)
^  Unify: (274) [user] mfix_vars1(0, _229878)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _229878)
^  Unify: (274) [user] mfix_vars1(0, _229878)
   Call: (275) [system] 0==[_243804, _243810]
^  Redo: (274) [user] mfix_vars1(0, _229878)
^  Unify: (274) [user] mfix_vars1(0, _229878)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _229878)
^  Unify: (274) [user] mfix_vars1(0, _229878)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _229878)
^  Unify: (274) [user] mfix_vars1(0, _229878)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _229878)
^  Unify: (274) [user] mfix_vars1(0, _229878)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _229878)
   Call: (275) [system] 0=_229878
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _229880, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1687, 0], [1687, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1687, 0], [";; Original:", 1687, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1687, 0], [";; Original:", 1687, 0])
   Call: (270) [system] compound_name_arguments(_124052, '$COMMENT', [";; Original:", 1687, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1687, 0), '$COMMENT', [";; Original:", 1687, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1687, 0)\=@='$COMMENT'(";; Original:", 1687, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1687, 0), _118466)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1687, 0), _280052))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1687, 0), _280052))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1687, 0), _280052))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1687, 0), _280052))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1687, 0), _280052)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1687, 0), _280052)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1687, 0), _285638))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1687, 0), _285638))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1687, 0), _285638)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1687, 0), _285638)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1687, 0), _285638)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1687, 0)\=@='$COMMENT'(";; Original:", 1687, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1687, 0), _280052)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1687, 0), _112854))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1687, 0), _112854))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1687, 0), _112854))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1687, 0), _112854))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1687, 0), _112854)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1687, 0), _112854)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1687, 0), _307958))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1687, 0), _307958))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1687, 0), _307958)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1687, 0), _307958)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1687, 0), _307958)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1687, 0)\=@='$COMMENT'(";; Original:", 1687, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1687, 0), _112854)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1687, 0)\=@='$COMMENT'(";; Original:", 1687, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1687, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1687, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1687, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1687, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1687, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1687, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1687, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1687, 0), _336736, [], _336738)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1687, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1687, 0), _336736, [], _336738)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1687, 0), _336736, [], _336738)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1687, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1687, 0), _336736, [], _336738)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1687, 0), _336736, [], _336738)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1687, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1687, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1687, 0), _346052, _346054)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1687, 0), '$COMMENT', [";; Original:", 1687, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1687, 0], _347938, [], _336738)
^  Unify: (258) [user] subst_vars([";; Original:", 1687, 0], [";; Original:", 1687, 0], [], [])
   Call: (259) [system] var([";; Original:", 1687, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1687, 0], _347938, [], _336738)
^  Unify: (258) [user] subst_vars([";; Original:", 1687, 0], [_351674|_351676], [], _336738)
^  Call: (259) [user] subst_vars(";; Original:", _351674, [], _352614)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _351674, [], _352614)
^  Unify: (259) [user] subst_vars(";; Original:", _351674, [], _352614)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _351674, [], _352614)
^  Unify: (259) [user] subst_vars(";; Original:", _351674, [], _352614)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _351674, [], _352614)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1687, 0], _351676, [], _336738)
^  Unify: (259) [user] subst_vars([1687, 0], [1687, 0], [], [])
   Call: (260) [system] var([1687, 0])
^  Redo: (259) [user] subst_vars([1687, 0], _351676, [], _336738)
^  Unify: (259) [user] subst_vars([1687, 0], [_367546|_367548], [], _336738)
^  Call: (260) [user] subst_vars(1687, _367546, [], _368486)
^  Unify: (260) [user] subst_vars(1687, 1687, [], [])
   Call: (261) [system] var(1687)
^  Redo: (260) [user] subst_vars(1687, _367546, [], _368486)
^  Unify: (260) [user] subst_vars(1687, _367546, [], _368486)
   Call: (261) [system] atom(1687)
^  Redo: (260) [user] subst_vars(1687, _367546, [], _368486)
^  Unify: (260) [user] subst_vars(1687, _367546, [], _368486)
   Call: (261) [system] compound(1687)
^  Redo: (260) [user] subst_vars(1687, _367546, [], _368486)
^  Unify: (260) [user] subst_vars(1687, 1687, [], [])
^  Exit: (260) [user] subst_vars(1687, 1687, [], [])
^  Call: (260) [user] subst_vars([0], _367548, [], _336738)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _367548, [], _336738)
^  Unify: (260) [user] subst_vars([0], [_383418|_383420], [], _336738)
^  Call: (261) [user] subst_vars(0, _383418, [], _384358)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _383418, [], _384358)
^  Unify: (261) [user] subst_vars(0, _383418, [], _384358)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _383418, [], _384358)
^  Unify: (261) [user] subst_vars(0, _383418, [], _384358)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _383418, [], _384358)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _383420, [], _336738)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _383420, [], _336738)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1687, 0], [1687, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1687, 0], [";; Original:", 1687, 0], [], [])
   Call: (258) [system] compound_name_arguments(_336736, '$COMMENT', [";; Original:", 1687, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1687, 0), '$COMMENT', [";; Original:", 1687, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1687, 0), '$COMMENT'(";; Original:", 1687, 0), [], [])
   Call: (257) [system] _406776=metta_file_buffer(+, '$COMMENT'(";; Original:", 1687, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1687, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1687, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1687, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1687, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1687, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1687, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1687, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1687, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1688, 0, 60341, '$COMMENT'(";; #[test]", 1688, 0), '$stream_position'(60341, 1688, 0, 60375)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1688, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1688, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; #[test]", 1688, 0), _459494))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 1688, 0), _459494))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; #[test]", 1688, 0), _459494)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 1688, 0), _459494)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1688, 0), _459494)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1688, 0), _459494)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; #[test]", 1688, 0), _465106))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1688, 0), _465106))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1688, 0), _465106))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1688, 0), _465106))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1688, 0), _465106)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1688, 0), _465106)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; #[test]", 1688, 0), _470692))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 1688, 0), _470692))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; #[test]", 1688, 0), _470692)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 1688, 0), _470692)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1688, 0), _470692)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1688, 0), _470692)
   Call: (270) [system] var('$COMMENT'(";; #[test]", 1688, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1688, 0), _470692)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1688, 0), '$VAR'(_478152))
   Call: (270) [system] atom('$COMMENT'(";; #[test]", 1688, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1688, 0), _470692)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1688, 0), _470692)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1688, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1688, 0), _470692)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1688, 0), _470692)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1688, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1688, 0), _470692)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1688, 0), _470692)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1688, 0)==[_487432, _487438]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1688, 0), _470692)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1688, 0), _470692)
   Call: (270) [system] is_list('$COMMENT'(";; #[test]", 1688, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1688, 0), _470692)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1688, 0), _470692)
   Call: (270) [system] string('$COMMENT'(";; #[test]", 1688, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1688, 0), _470692)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1688, 0), _470692)
   Call: (270) [system] compound('$COMMENT'(";; #[test]", 1688, 0))
   Exit: (270) [system] compound('$COMMENT'(";; #[test]", 1688, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1688, 0), _497634, _497636)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1688, 0), '$COMMENT', [";; #[test]", 1688, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; #[test]", 1688, 0], _501376)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 1688, 0], _501376)
   Call: (271) [apply] apply:maplist_([";; #[test]", 1688, 0], _501376, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; #[test]", 1688, 0], [_504194|_504196], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; #[test]", _504194)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _504194)
   Call: (273) [system] var(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _504194)
^  Unify: (272) [user] mfix_vars1(";; #[test]", '$VAR'(_508840))
   Call: (273) [system] atom(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _504194)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _504194)
   Call: (273) [system] ";; #[test]"==true
^  Redo: (272) [user] mfix_vars1(";; #[test]", _504194)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _504194)
   Call: (273) [system] ";; #[test]"==false
^  Redo: (272) [user] mfix_vars1(";; #[test]", _504194)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _504194)
   Call: (273) [system] ";; #[test]"==[_518120, _518126]
^  Redo: (272) [user] mfix_vars1(";; #[test]", _504194)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _504194)
   Call: (273) [system] is_list(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _504194)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _504194)
   Call: (273) [system] string(";; #[test]")
   Exit: (273) [system] string(";; #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; #[test]", _6024)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _6024)
   Call: (273) [system] compound(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _6024)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _6024)
^  Call: (273) [user] symbol(";; #[test]")
^  Unify: (273) [user] symbol(";; #[test]")
   Call: (274) [system] atom(";; #[test]")
   Fail: (274) [system] atom(";; #[test]")
^  Fail: (273) [user] symbol(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _6024)
   Call: (273) [system] ";; #[test]"=_6024
   Exit: (273) [system] ";; #[test]"=";; #[test]"
^  Exit: (272) [user] mfix_vars1(";; #[test]", ";; #[test]")
   Call: (272) [apply] apply:maplist_([1688, 0], _6026, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1688, 0], [_24272|_24274], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1688, _24272)
^  Unify: (273) [user] mfix_vars1(1688, _24272)
   Call: (274) [system] var(1688)
^  Redo: (273) [user] mfix_vars1(1688, _24272)
^  Unify: (273) [user] mfix_vars1(1688, '$VAR'(_28918))
   Call: (274) [system] atom(1688)
^  Redo: (273) [user] mfix_vars1(1688, _24272)
^  Unify: (273) [user] mfix_vars1(1688, _24272)
   Call: (274) [system] 1688==true
^  Redo: (273) [user] mfix_vars1(1688, _24272)
^  Unify: (273) [user] mfix_vars1(1688, _24272)
   Call: (274) [system] 1688==false
^  Redo: (273) [user] mfix_vars1(1688, _24272)
^  Unify: (273) [user] mfix_vars1(1688, _24272)
   Call: (274) [system] 1688==[_38198, _38204]
^  Redo: (273) [user] mfix_vars1(1688, _24272)
^  Unify: (273) [user] mfix_vars1(1688, _24272)
   Call: (274) [system] is_list(1688)
^  Redo: (273) [user] mfix_vars1(1688, _24272)
^  Unify: (273) [user] mfix_vars1(1688, _24272)
   Call: (274) [system] string(1688)
^  Redo: (273) [user] mfix_vars1(1688, _24272)
^  Unify: (273) [user] mfix_vars1(1688, _24272)
   Call: (274) [system] compound(1688)
^  Redo: (273) [user] mfix_vars1(1688, _24272)
^  Unify: (273) [user] mfix_vars1(1688, _24272)
^  Call: (274) [user] symbol(1688)
^  Unify: (274) [user] symbol(1688)
   Call: (275) [system] atom(1688)
   Fail: (275) [system] atom(1688)
^  Fail: (274) [user] symbol(1688)
^  Redo: (273) [user] mfix_vars1(1688, _24272)
   Call: (274) [system] 1688=_24272
   Exit: (274) [system] 1688=1688
^  Exit: (273) [user] mfix_vars1(1688, 1688)
   Call: (273) [apply] apply:maplist_([0], _24274, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_58598|_58600], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _58598)
^  Unify: (274) [user] mfix_vars1(0, _58598)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _58598)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_63244))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _58598)
^  Unify: (274) [user] mfix_vars1(0, _58598)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _58598)
^  Unify: (274) [user] mfix_vars1(0, _58598)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _58598)
^  Unify: (274) [user] mfix_vars1(0, _58598)
   Call: (275) [system] 0==[_72524, _72530]
^  Redo: (274) [user] mfix_vars1(0, _58598)
^  Unify: (274) [user] mfix_vars1(0, _58598)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _58598)
^  Unify: (274) [user] mfix_vars1(0, _58598)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _58598)
^  Unify: (274) [user] mfix_vars1(0, _58598)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _58598)
^  Unify: (274) [user] mfix_vars1(0, _58598)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _58598)
   Call: (275) [system] 0=_58598
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _58600, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1688, 0], [1688, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; #[test]", 1688, 0], [";; #[test]", 1688, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 1688, 0], [";; #[test]", 1688, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";; #[test]", 1688, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1688, 0), '$COMMENT', [";; #[test]", 1688, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1688, 0)\=@='$COMMENT'(";; #[test]", 1688, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1688, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; #[test]", 1688, 0), _108772))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1688, 0), _108772))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1688, 0), _108772))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1688, 0), _108772))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1688, 0), _108772)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1688, 0), _108772)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; #[test]", 1688, 0), _114358))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 1688, 0), _114358))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; #[test]", 1688, 0), _114358)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 1688, 0), _114358)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1688, 0), _114358)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1688, 0)\=@='$COMMENT'(";; #[test]", 1688, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1688, 0), _108772)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; #[test]", 1688, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1688, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1688, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1688, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1688, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1688, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; #[test]", 1688, 0), _136678))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 1688, 0), _136678))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; #[test]", 1688, 0), _136678)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 1688, 0), _136678)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1688, 0), _136678)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1688, 0)\=@='$COMMENT'(";; #[test]", 1688, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1688, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0)))
   Call: (261) [system] '$COMMENT'(";; #[test]", 1688, 0)\=@='$COMMENT'(";; #[test]", 1688, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1688, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1688, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1688, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1688, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1688, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1688, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1688, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1688, 0), _165456, [], _165458)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; #[test]", 1688, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1688, 0), _165456, [], _165458)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1688, 0), _165456, [], _165458)
   Call: (258) [system] atom('$COMMENT'(";; #[test]", 1688, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1688, 0), _165456, [], _165458)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1688, 0), _165456, [], _165458)
   Call: (258) [system] compound('$COMMENT'(";; #[test]", 1688, 0))
   Exit: (258) [system] compound('$COMMENT'(";; #[test]", 1688, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1688, 0), _174772, _174774)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1688, 0), '$COMMENT', [";; #[test]", 1688, 0])
^  Call: (258) [user] subst_vars([";; #[test]", 1688, 0], _176658, [], _165458)
^  Unify: (258) [user] subst_vars([";; #[test]", 1688, 0], [";; #[test]", 1688, 0], [], [])
   Call: (259) [system] var([";; #[test]", 1688, 0])
^  Redo: (258) [user] subst_vars([";; #[test]", 1688, 0], _176658, [], _165458)
^  Unify: (258) [user] subst_vars([";; #[test]", 1688, 0], [_180394|_180396], [], _165458)
^  Call: (259) [user] subst_vars(";; #[test]", _180394, [], _181334)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
   Call: (260) [system] var(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _180394, [], _181334)
^  Unify: (259) [user] subst_vars(";; #[test]", _180394, [], _181334)
   Call: (260) [system] atom(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _180394, [], _181334)
^  Unify: (259) [user] subst_vars(";; #[test]", _180394, [], _181334)
   Call: (260) [system] compound(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _180394, [], _181334)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Exit: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Call: (259) [user] subst_vars([1688, 0], _180396, [], _165458)
^  Unify: (259) [user] subst_vars([1688, 0], [1688, 0], [], [])
   Call: (260) [system] var([1688, 0])
^  Redo: (259) [user] subst_vars([1688, 0], _180396, [], _165458)
^  Unify: (259) [user] subst_vars([1688, 0], [_196266|_196268], [], _165458)
^  Call: (260) [user] subst_vars(1688, _196266, [], _197206)
^  Unify: (260) [user] subst_vars(1688, 1688, [], [])
   Call: (261) [system] var(1688)
^  Redo: (260) [user] subst_vars(1688, _196266, [], _197206)
^  Unify: (260) [user] subst_vars(1688, _196266, [], _197206)
   Call: (261) [system] atom(1688)
^  Redo: (260) [user] subst_vars(1688, _196266, [], _197206)
^  Unify: (260) [user] subst_vars(1688, _196266, [], _197206)
   Call: (261) [system] compound(1688)
^  Redo: (260) [user] subst_vars(1688, _196266, [], _197206)
^  Unify: (260) [user] subst_vars(1688, 1688, [], [])
^  Exit: (260) [user] subst_vars(1688, 1688, [], [])
^  Call: (260) [user] subst_vars([0], _196268, [], _165458)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _196268, [], _165458)
^  Unify: (260) [user] subst_vars([0], [_212138|_212140], [], _165458)
^  Call: (261) [user] subst_vars(0, _212138, [], _213078)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _212138, [], _213078)
^  Unify: (261) [user] subst_vars(0, _212138, [], _213078)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _212138, [], _213078)
^  Unify: (261) [user] subst_vars(0, _212138, [], _213078)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _212138, [], _213078)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _212140, [], _165458)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _212140, [], _165458)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1688, 0], [1688, 0], [], [])
^  Exit: (258) [user] subst_vars([";; #[test]", 1688, 0], [";; #[test]", 1688, 0], [], [])
   Call: (258) [system] compound_name_arguments(_165456, '$COMMENT', [";; #[test]", 1688, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1688, 0), '$COMMENT', [";; #[test]", 1688, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1688, 0), '$COMMENT'(";; #[test]", 1688, 0), [], [])
   Call: (257) [system] _235496=metta_file_buffer(+, '$COMMENT'(";; #[test]", 1688, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; #[test]", 1688, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; #[test]", 1688, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 1688, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 1688, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1688, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1688, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1688, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1688, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1689, 0, 60352, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$stream_position'(60352, 1689, 0, 60386)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _288220))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _288220))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _288220)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _288220)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _288220)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _288220)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _293832))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _293832))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _293832))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _293832))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _293832)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _293832)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _299418))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _299418))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _299418)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _299418)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _299418)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _299418)
   Call: (270) [system] var('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _299418)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$VAR'(_306878))
   Call: (270) [system] atom('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _299418)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _299418)
   Call: (270) [system] '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _299418)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _299418)
   Call: (270) [system] '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _299418)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _299418)
   Call: (270) [system] '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0)==[_316158, _316164]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _299418)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _299418)
   Call: (270) [system] is_list('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _299418)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _299418)
   Call: (270) [system] string('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _299418)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _299418)
   Call: (270) [system] compound('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
   Exit: (270) [system] compound('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _326360, _326362)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT', [";; fn test_get_doc_function_call() {", 1689, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; fn test_get_doc_function_call() {", 1689, 0], _330102)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn test_get_doc_function_call() {", 1689, 0], _330102)
   Call: (271) [apply] apply:maplist_([";; fn test_get_doc_function_call() {", 1689, 0], _330102, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; fn test_get_doc_function_call() {", 1689, 0], [_332920|_332922], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; fn test_get_doc_function_call() {", _332920)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_function_call() {", _332920)
   Call: (273) [system] var(";; fn test_get_doc_function_call() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_function_call() {", _332920)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_function_call() {", '$VAR'(_337566))
   Call: (273) [system] atom(";; fn test_get_doc_function_call() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_function_call() {", _332920)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_function_call() {", _332920)
   Call: (273) [system] ";; fn test_get_doc_function_call() {"==true
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_function_call() {", _332920)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_function_call() {", _332920)
   Call: (273) [system] ";; fn test_get_doc_function_call() {"==false
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_function_call() {", _332920)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_function_call() {", _332920)
   Call: (273) [system] ";; fn test_get_doc_function_call() {"==[_346846, _346852]
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_function_call() {", _332920)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_function_call() {", _332920)
   Call: (273) [system] is_list(";; fn test_get_doc_function_call() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_function_call() {", _332920)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_function_call() {", _332920)
   Call: (273) [system] string(";; fn test_get_doc_function_call() {")
   Exit: (273) [system] string(";; fn test_get_doc_function_call() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_function_call() {", _332920)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_function_call() {", _332920)
   Call: (273) [system] compound(";; fn test_get_doc_function_call() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_function_call() {", _332920)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_function_call() {", _332920)
^  Call: (273) [user] symbol(";; fn test_get_doc_function_call() {")
^  Unify: (273) [user] symbol(";; fn test_get_doc_function_call() {")
   Call: (274) [system] atom(";; fn test_get_doc_function_call() {")
   Fail: (274) [system] atom(";; fn test_get_doc_function_call() {")
^  Fail: (273) [user] symbol(";; fn test_get_doc_function_call() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_function_call() {", _332920)
   Call: (273) [system] ";; fn test_get_doc_function_call() {"=_332920
   Exit: (273) [system] ";; fn test_get_doc_function_call() {"=";; fn test_get_doc_function_call() {"
^  Exit: (272) [user] mfix_vars1(";; fn test_get_doc_function_call() {", ";; fn test_get_doc_function_call() {")
   Call: (272) [apply] apply:maplist_([1689, 0], _332922, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1689, 0], [_370918|_370920], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1689, _370918)
^  Unify: (273) [user] mfix_vars1(1689, _370918)
   Call: (274) [system] var(1689)
^  Redo: (273) [user] mfix_vars1(1689, _370918)
^  Unify: (273) [user] mfix_vars1(1689, '$VAR'(_375564))
   Call: (274) [system] atom(1689)
^  Redo: (273) [user] mfix_vars1(1689, _370918)
^  Unify: (273) [user] mfix_vars1(1689, _370918)
   Call: (274) [system] 1689==true
^  Redo: (273) [user] mfix_vars1(1689, _370918)
^  Unify: (273) [user] mfix_vars1(1689, _370918)
   Call: (274) [system] 1689==false
^  Redo: (273) [user] mfix_vars1(1689, _370918)
^  Unify: (273) [user] mfix_vars1(1689, _370918)
   Call: (274) [system] 1689==[_384844, _384850]
^  Redo: (273) [user] mfix_vars1(1689, _370918)
^  Unify: (273) [user] mfix_vars1(1689, _370918)
   Call: (274) [system] is_list(1689)
^  Redo: (273) [user] mfix_vars1(1689, _370918)
^  Unify: (273) [user] mfix_vars1(1689, _370918)
   Call: (274) [system] string(1689)
^  Redo: (273) [user] mfix_vars1(1689, _370918)
^  Unify: (273) [user] mfix_vars1(1689, _370918)
   Call: (274) [system] compound(1689)
^  Redo: (273) [user] mfix_vars1(1689, _370918)
^  Unify: (273) [user] mfix_vars1(1689, _370918)
^  Call: (274) [user] symbol(1689)
^  Unify: (274) [user] symbol(1689)
   Call: (275) [system] atom(1689)
   Fail: (275) [system] atom(1689)
^  Fail: (274) [user] symbol(1689)
^  Redo: (273) [user] mfix_vars1(1689, _370918)
   Call: (274) [system] 1689=_370918
   Exit: (274) [system] 1689=1689
^  Exit: (273) [user] mfix_vars1(1689, 1689)
   Call: (273) [apply] apply:maplist_([0], _370920, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_405244|_405246], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _405244)
^  Unify: (274) [user] mfix_vars1(0, _405244)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _405244)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_409890))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _405244)
^  Unify: (274) [user] mfix_vars1(0, _405244)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _405244)
^  Unify: (274) [user] mfix_vars1(0, _405244)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _405244)
^  Unify: (274) [user] mfix_vars1(0, _405244)
   Call: (275) [system] 0==[_419170, _419176]
^  Redo: (274) [user] mfix_vars1(0, _405244)
^  Unify: (274) [user] mfix_vars1(0, _405244)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _405244)
^  Unify: (274) [user] mfix_vars1(0, _405244)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _405244)
^  Unify: (274) [user] mfix_vars1(0, _405244)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _405244)
^  Unify: (274) [user] mfix_vars1(0, _405244)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _405244)
   Call: (275) [system] 0=_405244
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _405246, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1689, 0], [1689, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; fn test_get_doc_function_call() {", 1689, 0], [";; fn test_get_doc_function_call() {", 1689, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn test_get_doc_function_call() {", 1689, 0], [";; fn test_get_doc_function_call() {", 1689, 0])
   Call: (270) [system] compound_name_arguments(_299418, '$COMMENT', [";; fn test_get_doc_function_call() {", 1689, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT', [";; fn test_get_doc_function_call() {", 1689, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0)\=@='$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _293832)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _455418))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _455418))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _455418))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _455418))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _455418)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _455418)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _461004))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _461004))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _461004)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _461004)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _461004)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0)\=@='$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _455418)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _288220))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _288220))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _288220))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _288220))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _288220)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _288220)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _483324))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _483324))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _483324)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _483324)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _483324)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0)\=@='$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _288220)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0)))
   Call: (261) [system] '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0)\=@='$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _512102, [], _512104)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _512102, [], _512104)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _512102, [], _512104)
   Call: (258) [system] atom('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _512102, [], _512104)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _512102, [], _512104)
   Call: (258) [system] compound('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
   Exit: (258) [system] compound('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), _521418, _521420)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT', [";; fn test_get_doc_function_call() {", 1689, 0])
^  Call: (258) [user] subst_vars([";; fn test_get_doc_function_call() {", 1689, 0], _5972, [], _5946)
^  Unify: (258) [user] subst_vars([";; fn test_get_doc_function_call() {", 1689, 0], [";; fn test_get_doc_function_call() {", 1689, 0], [], [])
   Call: (259) [system] var([";; fn test_get_doc_function_call() {", 1689, 0])
^  Redo: (258) [user] subst_vars([";; fn test_get_doc_function_call() {", 1689, 0], _5972, [], _5946)
^  Unify: (258) [user] subst_vars([";; fn test_get_doc_function_call() {", 1689, 0], [_9126|_9128], [], _5946)
^  Call: (259) [user] subst_vars(";; fn test_get_doc_function_call() {", _9126, [], _10066)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_function_call() {", ";; fn test_get_doc_function_call() {", [], [])
   Call: (260) [system] var(";; fn test_get_doc_function_call() {")
^  Redo: (259) [user] subst_vars(";; fn test_get_doc_function_call() {", _9126, [], _10066)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_function_call() {", _9126, [], _10066)
   Call: (260) [system] atom(";; fn test_get_doc_function_call() {")
^  Redo: (259) [user] subst_vars(";; fn test_get_doc_function_call() {", _9126, [], _10066)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_function_call() {", _9126, [], _10066)
   Call: (260) [system] compound(";; fn test_get_doc_function_call() {")
^  Redo: (259) [user] subst_vars(";; fn test_get_doc_function_call() {", _9126, [], _10066)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_function_call() {", ";; fn test_get_doc_function_call() {", [], [])
^  Exit: (259) [user] subst_vars(";; fn test_get_doc_function_call() {", ";; fn test_get_doc_function_call() {", [], [])
^  Call: (259) [user] subst_vars([1689, 0], _9128, [], _5946)
^  Unify: (259) [user] subst_vars([1689, 0], [1689, 0], [], [])
   Call: (260) [system] var([1689, 0])
^  Redo: (259) [user] subst_vars([1689, 0], _9128, [], _5946)
^  Unify: (259) [user] subst_vars([1689, 0], [_24998|_25000], [], _5946)
^  Call: (260) [user] subst_vars(1689, _24998, [], _25938)
^  Unify: (260) [user] subst_vars(1689, 1689, [], [])
   Call: (261) [system] var(1689)
^  Redo: (260) [user] subst_vars(1689, _24998, [], _25938)
^  Unify: (260) [user] subst_vars(1689, _24998, [], _25938)
   Call: (261) [system] atom(1689)
^  Redo: (260) [user] subst_vars(1689, _24998, [], _25938)
^  Unify: (260) [user] subst_vars(1689, _24998, [], _25938)
   Call: (261) [system] compound(1689)
^  Redo: (260) [user] subst_vars(1689, _24998, [], _25938)
^  Unify: (260) [user] subst_vars(1689, 1689, [], [])
^  Exit: (260) [user] subst_vars(1689, 1689, [], [])
^  Call: (260) [user] subst_vars([0], _25000, [], _5946)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _25000, [], _5946)
^  Unify: (260) [user] subst_vars([0], [_40870|_40872], [], _5946)
^  Call: (261) [user] subst_vars(0, _40870, [], _41810)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _40870, [], _41810)
^  Unify: (261) [user] subst_vars(0, _40870, [], _41810)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _40870, [], _41810)
^  Unify: (261) [user] subst_vars(0, _40870, [], _41810)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _40870, [], _41810)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _40872, [], _5946)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _40872, [], _5946)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1689, 0], [1689, 0], [], [])
^  Exit: (258) [user] subst_vars([";; fn test_get_doc_function_call() {", 1689, 0], [";; fn test_get_doc_function_call() {", 1689, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5944, '$COMMENT', [";; fn test_get_doc_function_call() {", 1689, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT', [";; fn test_get_doc_function_call() {", 1689, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), [], [])
   Call: (257) [system] _64228=metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_function_call() {", 1689, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1690, 0, 60389, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$stream_position'(60389, 1690, 0, 60423)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _116958))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _116958))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _116958)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _116958)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _116958)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _116958)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _122570))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _122570))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _122570))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _122570))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _122570)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _122570)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _128156))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _128156))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _128156)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _128156)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _128156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _128156)
   Call: (270) [system] var('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _128156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$VAR'(_135616))
   Call: (270) [system] atom('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _128156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _128156)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _128156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _128156)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _128156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _128156)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0)==[_144896, _144902]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _128156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _128156)
   Call: (270) [system] is_list('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _128156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _128156)
   Call: (270) [system] string('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _128156)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _128156)
   Call: (270) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _155098, _155100)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0], _158840)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0], _158840)
   Call: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0], _158840, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0], [_161658|_161660], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _161658)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _161658)
   Call: (273) [system] var(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _161658)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", '$VAR'(_166304))
   Call: (273) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _161658)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _161658)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==true
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _161658)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _161658)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==false
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _161658)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _161658)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==[_175584, _175590]
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _161658)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _161658)
   Call: (273) [system] is_list(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _161658)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _161658)
   Call: (273) [system] string(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Exit: (273) [system] string(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _161658)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _161658)
   Call: (273) [system] compound(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _161658)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _161658)
^  Call: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Unify: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (274) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Fail: (274) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Fail: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _161658)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"=_161658
   Exit: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"=";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"
^  Exit: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (272) [apply] apply:maplist_([1690, 0], _161660, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1690, 0], [_199656|_199658], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1690, _199656)
^  Unify: (273) [user] mfix_vars1(1690, _199656)
   Call: (274) [system] var(1690)
^  Redo: (273) [user] mfix_vars1(1690, _199656)
^  Unify: (273) [user] mfix_vars1(1690, '$VAR'(_204302))
   Call: (274) [system] atom(1690)
^  Redo: (273) [user] mfix_vars1(1690, _199656)
^  Unify: (273) [user] mfix_vars1(1690, _199656)
   Call: (274) [system] 1690==true
^  Redo: (273) [user] mfix_vars1(1690, _199656)
^  Unify: (273) [user] mfix_vars1(1690, _199656)
   Call: (274) [system] 1690==false
^  Redo: (273) [user] mfix_vars1(1690, _199656)
^  Unify: (273) [user] mfix_vars1(1690, _199656)
   Call: (274) [system] 1690==[_213582, _213588]
^  Redo: (273) [user] mfix_vars1(1690, _199656)
^  Unify: (273) [user] mfix_vars1(1690, _199656)
   Call: (274) [system] is_list(1690)
^  Redo: (273) [user] mfix_vars1(1690, _199656)
^  Unify: (273) [user] mfix_vars1(1690, _199656)
   Call: (274) [system] string(1690)
^  Redo: (273) [user] mfix_vars1(1690, _199656)
^  Unify: (273) [user] mfix_vars1(1690, _199656)
   Call: (274) [system] compound(1690)
^  Redo: (273) [user] mfix_vars1(1690, _199656)
^  Unify: (273) [user] mfix_vars1(1690, _199656)
^  Call: (274) [user] symbol(1690)
^  Unify: (274) [user] symbol(1690)
   Call: (275) [system] atom(1690)
   Fail: (275) [system] atom(1690)
^  Fail: (274) [user] symbol(1690)
^  Redo: (273) [user] mfix_vars1(1690, _199656)
   Call: (274) [system] 1690=_199656
   Exit: (274) [system] 1690=1690
^  Exit: (273) [user] mfix_vars1(1690, 1690)
   Call: (273) [apply] apply:maplist_([0], _199658, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_233982|_233984], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _233982)
^  Unify: (274) [user] mfix_vars1(0, _233982)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _233982)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_238628))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _233982)
^  Unify: (274) [user] mfix_vars1(0, _233982)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _233982)
^  Unify: (274) [user] mfix_vars1(0, _233982)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _233982)
^  Unify: (274) [user] mfix_vars1(0, _233982)
   Call: (275) [system] 0==[_247908, _247914]
^  Redo: (274) [user] mfix_vars1(0, _233982)
^  Unify: (274) [user] mfix_vars1(0, _233982)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _233982)
^  Unify: (274) [user] mfix_vars1(0, _233982)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _233982)
^  Unify: (274) [user] mfix_vars1(0, _233982)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _233982)
^  Unify: (274) [user] mfix_vars1(0, _233982)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _233982)
   Call: (275) [system] 0=_233982
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _233984, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1690, 0], [1690, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0])
   Call: (270) [system] compound_name_arguments(_128156, '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _122570)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _284156))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _284156))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _284156))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _284156))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _284156)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _284156)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _289742))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _289742))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _289742)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _289742)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _289742)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _284156)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _116958))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _116958))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _116958))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _116958))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _116958)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _116958)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _312062))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _312062))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _312062)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _312062)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _312062)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _116958)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0)))
   Call: (261) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _340840, [], _340842)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _340840, [], _340842)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _340840, [], _340842)
   Call: (258) [system] atom('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _340840, [], _340842)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _340840, [], _340842)
   Call: (258) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), _350156, _350158)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0])
^  Call: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0], _352042, [], _340842)
^  Unify: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0], [], [])
   Call: (259) [system] var([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0])
^  Redo: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0], _352042, [], _340842)
^  Unify: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0], [_355778|_355780], [], _340842)
^  Call: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _355778, [], _356718)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
   Call: (260) [system] var(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _355778, [], _356718)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _355778, [], _356718)
   Call: (260) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _355778, [], _356718)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _355778, [], _356718)
   Call: (260) [system] compound(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _355778, [], _356718)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Exit: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Call: (259) [user] subst_vars([1690, 0], _355780, [], _340842)
^  Unify: (259) [user] subst_vars([1690, 0], [1690, 0], [], [])
   Call: (260) [system] var([1690, 0])
^  Redo: (259) [user] subst_vars([1690, 0], _355780, [], _340842)
^  Unify: (259) [user] subst_vars([1690, 0], [_371650|_371652], [], _340842)
^  Call: (260) [user] subst_vars(1690, _371650, [], _372590)
^  Unify: (260) [user] subst_vars(1690, 1690, [], [])
   Call: (261) [system] var(1690)
^  Redo: (260) [user] subst_vars(1690, _371650, [], _372590)
^  Unify: (260) [user] subst_vars(1690, _371650, [], _372590)
   Call: (261) [system] atom(1690)
^  Redo: (260) [user] subst_vars(1690, _371650, [], _372590)
^  Unify: (260) [user] subst_vars(1690, _371650, [], _372590)
   Call: (261) [system] compound(1690)
^  Redo: (260) [user] subst_vars(1690, _371650, [], _372590)
^  Unify: (260) [user] subst_vars(1690, 1690, [], [])
^  Exit: (260) [user] subst_vars(1690, 1690, [], [])
^  Call: (260) [user] subst_vars([0], _371652, [], _340842)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _371652, [], _340842)
^  Unify: (260) [user] subst_vars([0], [_387522|_387524], [], _340842)
^  Call: (261) [user] subst_vars(0, _387522, [], _388462)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _387522, [], _388462)
^  Unify: (261) [user] subst_vars(0, _387522, [], _388462)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _387522, [], _388462)
^  Unify: (261) [user] subst_vars(0, _387522, [], _388462)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _387522, [], _388462)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _387524, [], _340842)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _387524, [], _340842)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1690, 0], [1690, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0], [], [])
   Call: (258) [system] compound_name_arguments(_340840, '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), [], [])
   Call: (257) [system] _410880=metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1690, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1691, 0, 60450, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$stream_position'(60450, 1691, 0, 60484)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _463606))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _463606))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _463606)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _463606)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _463606)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _463606)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _469218))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _469218))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _469218))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _469218))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _469218)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _469218)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _474804))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _474804))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _474804)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _474804)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _474804)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _474804)
   Call: (270) [system] var('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _474804)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$VAR'(_482264))
   Call: (270) [system] atom('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _474804)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _474804)
   Call: (270) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _474804)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _474804)
   Call: (270) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _474804)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _474804)
   Call: (270) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0)==[_491544, _491550]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _474804)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _474804)
   Call: (270) [system] is_list('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _474804)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _474804)
   Call: (270) [system] string('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _474804)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _474804)
   Call: (270) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _501746, _501748)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1691, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     let parser = SExprParser::new(r#\"", 1691, 0], _505488)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let parser = SExprParser::new(r#\"", 1691, 0], _505488)
   Call: (271) [apply] apply:maplist_([";;     let parser = SExprParser::new(r#\"", 1691, 0], _505488, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     let parser = SExprParser::new(r#\"", 1691, 0], [_508306|_508308], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _508306)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _508306)
   Call: (273) [system] var(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _508306)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", '$VAR'(_512952))
   Call: (273) [system] atom(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _508306)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _508306)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""==true
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _508306)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _508306)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""==false
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _508306)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _508306)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""==[_522232, _522238]
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _508306)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _6032)
   Call: (273) [system] is_list(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _6032)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _6032)
   Call: (273) [system] string(";;     let parser = SExprParser::new(r#\"")
   Exit: (273) [system] string(";;     let parser = SExprParser::new(r#\"")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _6032)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _6032)
   Call: (273) [system] compound(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _6032)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _6032)
^  Call: (273) [user] symbol(";;     let parser = SExprParser::new(r#\"")
^  Unify: (273) [user] symbol(";;     let parser = SExprParser::new(r#\"")
   Call: (274) [system] atom(";;     let parser = SExprParser::new(r#\"")
   Fail: (274) [system] atom(";;     let parser = SExprParser::new(r#\"")
^  Fail: (273) [user] symbol(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _6032)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""=_6032
   Exit: (273) [system] ";;     let parser = SExprParser::new(r#\""=";;     let parser = SExprParser::new(r#\""
^  Exit: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"")
   Call: (272) [apply] apply:maplist_([1691, 0], _6034, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1691, 0], [_28204|_28206], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1691, _28204)
^  Unify: (273) [user] mfix_vars1(1691, _28204)
   Call: (274) [system] var(1691)
^  Redo: (273) [user] mfix_vars1(1691, _28204)
^  Unify: (273) [user] mfix_vars1(1691, '$VAR'(_32850))
   Call: (274) [system] atom(1691)
^  Redo: (273) [user] mfix_vars1(1691, _28204)
^  Unify: (273) [user] mfix_vars1(1691, _28204)
   Call: (274) [system] 1691==true
^  Redo: (273) [user] mfix_vars1(1691, _28204)
^  Unify: (273) [user] mfix_vars1(1691, _28204)
   Call: (274) [system] 1691==false
^  Redo: (273) [user] mfix_vars1(1691, _28204)
^  Unify: (273) [user] mfix_vars1(1691, _28204)
   Call: (274) [system] 1691==[_42130, _42136]
^  Redo: (273) [user] mfix_vars1(1691, _28204)
^  Unify: (273) [user] mfix_vars1(1691, _28204)
   Call: (274) [system] is_list(1691)
^  Redo: (273) [user] mfix_vars1(1691, _28204)
^  Unify: (273) [user] mfix_vars1(1691, _28204)
   Call: (274) [system] string(1691)
^  Redo: (273) [user] mfix_vars1(1691, _28204)
^  Unify: (273) [user] mfix_vars1(1691, _28204)
   Call: (274) [system] compound(1691)
^  Redo: (273) [user] mfix_vars1(1691, _28204)
^  Unify: (273) [user] mfix_vars1(1691, _28204)
^  Call: (274) [user] symbol(1691)
^  Unify: (274) [user] symbol(1691)
   Call: (275) [system] atom(1691)
   Fail: (275) [system] atom(1691)
^  Fail: (274) [user] symbol(1691)
^  Redo: (273) [user] mfix_vars1(1691, _28204)
   Call: (274) [system] 1691=_28204
   Exit: (274) [system] 1691=1691
^  Exit: (273) [user] mfix_vars1(1691, 1691)
   Call: (273) [apply] apply:maplist_([0], _28206, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_62530|_62532], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _62530)
^  Unify: (274) [user] mfix_vars1(0, _62530)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _62530)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_67176))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _62530)
^  Unify: (274) [user] mfix_vars1(0, _62530)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _62530)
^  Unify: (274) [user] mfix_vars1(0, _62530)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _62530)
^  Unify: (274) [user] mfix_vars1(0, _62530)
   Call: (275) [system] 0==[_76456, _76462]
^  Redo: (274) [user] mfix_vars1(0, _62530)
^  Unify: (274) [user] mfix_vars1(0, _62530)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _62530)
^  Unify: (274) [user] mfix_vars1(0, _62530)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _62530)
^  Unify: (274) [user] mfix_vars1(0, _62530)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _62530)
^  Unify: (274) [user] mfix_vars1(0, _62530)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _62530)
   Call: (275) [system] 0=_62530
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _62532, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1691, 0], [1691, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     let parser = SExprParser::new(r#\"", 1691, 0], [";;     let parser = SExprParser::new(r#\"", 1691, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let parser = SExprParser::new(r#\"", 1691, 0], [";;     let parser = SExprParser::new(r#\"", 1691, 0])
   Call: (270) [system] compound_name_arguments(_5986, '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1691, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1691, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0)))
   Call: (267) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _5972)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _112704))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _112704))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _112704))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _112704))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _112704)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _112704)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _118290))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _118290))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _118290)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _118290)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _118290)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0)))
   Call: (267) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _112704)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _5952))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _5952))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _5952))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _5952))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _5952)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _140610))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _140610))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _140610)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _140610)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _140610)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0)))
   Call: (267) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0)))
   Call: (261) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _169388, [], _169390)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _169388, [], _169390)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _169388, [], _169390)
   Call: (258) [system] atom('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _169388, [], _169390)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _169388, [], _169390)
   Call: (258) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), _178704, _178706)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1691, 0])
^  Call: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1691, 0], _180590, [], _169390)
^  Unify: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1691, 0], [";;     let parser = SExprParser::new(r#\"", 1691, 0], [], [])
   Call: (259) [system] var([";;     let parser = SExprParser::new(r#\"", 1691, 0])
^  Redo: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1691, 0], _180590, [], _169390)
^  Unify: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1691, 0], [_184326|_184328], [], _169390)
^  Call: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _184326, [], _185266)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"", [], [])
   Call: (260) [system] var(";;     let parser = SExprParser::new(r#\"")
^  Redo: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _184326, [], _185266)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _184326, [], _185266)
   Call: (260) [system] atom(";;     let parser = SExprParser::new(r#\"")
^  Redo: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _184326, [], _185266)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _184326, [], _185266)
   Call: (260) [system] compound(";;     let parser = SExprParser::new(r#\"")
^  Redo: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _184326, [], _185266)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"", [], [])
^  Exit: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"", [], [])
^  Call: (259) [user] subst_vars([1691, 0], _184328, [], _169390)
^  Unify: (259) [user] subst_vars([1691, 0], [1691, 0], [], [])
   Call: (260) [system] var([1691, 0])
^  Redo: (259) [user] subst_vars([1691, 0], _184328, [], _169390)
^  Unify: (259) [user] subst_vars([1691, 0], [_200198|_200200], [], _169390)
^  Call: (260) [user] subst_vars(1691, _200198, [], _201138)
^  Unify: (260) [user] subst_vars(1691, 1691, [], [])
   Call: (261) [system] var(1691)
^  Redo: (260) [user] subst_vars(1691, _200198, [], _201138)
^  Unify: (260) [user] subst_vars(1691, _200198, [], _201138)
   Call: (261) [system] atom(1691)
^  Redo: (260) [user] subst_vars(1691, _200198, [], _201138)
^  Unify: (260) [user] subst_vars(1691, _200198, [], _201138)
   Call: (261) [system] compound(1691)
^  Redo: (260) [user] subst_vars(1691, _200198, [], _201138)
^  Unify: (260) [user] subst_vars(1691, 1691, [], [])
^  Exit: (260) [user] subst_vars(1691, 1691, [], [])
^  Call: (260) [user] subst_vars([0], _200200, [], _169390)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _200200, [], _169390)
^  Unify: (260) [user] subst_vars([0], [_216070|_216072], [], _169390)
^  Call: (261) [user] subst_vars(0, _216070, [], _217010)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _216070, [], _217010)
^  Unify: (261) [user] subst_vars(0, _216070, [], _217010)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _216070, [], _217010)
^  Unify: (261) [user] subst_vars(0, _216070, [], _217010)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _216070, [], _217010)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _216072, [], _169390)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _216072, [], _169390)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1691, 0], [1691, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1691, 0], [";;     let parser = SExprParser::new(r#\"", 1691, 0], [], [])
   Call: (258) [system] compound_name_arguments(_169388, '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1691, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1691, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), [], [])
   Call: (257) [system] _239428=metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1691, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1692, 0, 60491, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$stream_position'(60491, 1692, 0, 60525)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _292150))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _292150))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _292150)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _292150)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _292150)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _292150)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _297762))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _297762))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _297762))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _297762))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _297762)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _297762)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _303348))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _303348))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _303348)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _303348)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _303348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _303348)
   Call: (270) [system] var('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _303348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$VAR'(_310808))
   Call: (270) [system] atom('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _303348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _303348)
   Call: (270) [system] '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _303348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _303348)
   Call: (270) [system] '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _303348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _303348)
   Call: (270) [system] '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0)==[_320088, _320094]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _303348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _303348)
   Call: (270) [system] is_list('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _303348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _303348)
   Call: (270) [system] string('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _303348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _303348)
   Call: (270) [system] compound('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _330290, _330292)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT', [";;         (: Arg1Type Type)", 1692, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         (: Arg1Type Type)", 1692, 0], _334032)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (: Arg1Type Type)", 1692, 0], _334032)
   Call: (271) [apply] apply:maplist_([";;         (: Arg1Type Type)", 1692, 0], _334032, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         (: Arg1Type Type)", 1692, 0], [_336850|_336852], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _336850)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _336850)
   Call: (273) [system] var(";;         (: Arg1Type Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _336850)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", '$VAR'(_341496))
   Call: (273) [system] atom(";;         (: Arg1Type Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _336850)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _336850)
   Call: (273) [system] ";;         (: Arg1Type Type)"==true
^  Redo: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _336850)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _336850)
   Call: (273) [system] ";;         (: Arg1Type Type)"==false
^  Redo: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _336850)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _336850)
   Call: (273) [system] ";;         (: Arg1Type Type)"==[_350776, _350782]
^  Redo: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _336850)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _336850)
   Call: (273) [system] is_list(";;         (: Arg1Type Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _336850)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _336850)
   Call: (273) [system] string(";;         (: Arg1Type Type)")
   Exit: (273) [system] string(";;         (: Arg1Type Type)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _336850)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _336850)
   Call: (273) [system] compound(";;         (: Arg1Type Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _336850)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _336850)
^  Call: (273) [user] symbol(";;         (: Arg1Type Type)")
^  Unify: (273) [user] symbol(";;         (: Arg1Type Type)")
   Call: (274) [system] atom(";;         (: Arg1Type Type)")
   Fail: (274) [system] atom(";;         (: Arg1Type Type)")
^  Fail: (273) [user] symbol(";;         (: Arg1Type Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", _336850)
   Call: (273) [system] ";;         (: Arg1Type Type)"=_336850
   Exit: (273) [system] ";;         (: Arg1Type Type)"=";;         (: Arg1Type Type)"
^  Exit: (272) [user] mfix_vars1(";;         (: Arg1Type Type)", ";;         (: Arg1Type Type)")
   Call: (272) [apply] apply:maplist_([1692, 0], _336852, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1692, 0], [_374848|_374850], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1692, _374848)
^  Unify: (273) [user] mfix_vars1(1692, _374848)
   Call: (274) [system] var(1692)
^  Redo: (273) [user] mfix_vars1(1692, _374848)
^  Unify: (273) [user] mfix_vars1(1692, '$VAR'(_379494))
   Call: (274) [system] atom(1692)
^  Redo: (273) [user] mfix_vars1(1692, _374848)
^  Unify: (273) [user] mfix_vars1(1692, _374848)
   Call: (274) [system] 1692==true
^  Redo: (273) [user] mfix_vars1(1692, _374848)
^  Unify: (273) [user] mfix_vars1(1692, _374848)
   Call: (274) [system] 1692==false
^  Redo: (273) [user] mfix_vars1(1692, _374848)
^  Unify: (273) [user] mfix_vars1(1692, _374848)
   Call: (274) [system] 1692==[_388774, _388780]
^  Redo: (273) [user] mfix_vars1(1692, _374848)
^  Unify: (273) [user] mfix_vars1(1692, _374848)
   Call: (274) [system] is_list(1692)
^  Redo: (273) [user] mfix_vars1(1692, _374848)
^  Unify: (273) [user] mfix_vars1(1692, _374848)
   Call: (274) [system] string(1692)
^  Redo: (273) [user] mfix_vars1(1692, _374848)
^  Unify: (273) [user] mfix_vars1(1692, _374848)
   Call: (274) [system] compound(1692)
^  Redo: (273) [user] mfix_vars1(1692, _374848)
^  Unify: (273) [user] mfix_vars1(1692, _374848)
^  Call: (274) [user] symbol(1692)
^  Unify: (274) [user] symbol(1692)
   Call: (275) [system] atom(1692)
   Fail: (275) [system] atom(1692)
^  Fail: (274) [user] symbol(1692)
^  Redo: (273) [user] mfix_vars1(1692, _374848)
   Call: (274) [system] 1692=_374848
   Exit: (274) [system] 1692=1692
^  Exit: (273) [user] mfix_vars1(1692, 1692)
   Call: (273) [apply] apply:maplist_([0], _374850, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_409174|_409176], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _409174)
^  Unify: (274) [user] mfix_vars1(0, _409174)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _409174)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_413820))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _409174)
^  Unify: (274) [user] mfix_vars1(0, _409174)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _409174)
^  Unify: (274) [user] mfix_vars1(0, _409174)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _409174)
^  Unify: (274) [user] mfix_vars1(0, _409174)
   Call: (275) [system] 0==[_423100, _423106]
^  Redo: (274) [user] mfix_vars1(0, _409174)
^  Unify: (274) [user] mfix_vars1(0, _409174)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _409174)
^  Unify: (274) [user] mfix_vars1(0, _409174)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _409174)
^  Unify: (274) [user] mfix_vars1(0, _409174)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _409174)
^  Unify: (274) [user] mfix_vars1(0, _409174)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _409174)
   Call: (275) [system] 0=_409174
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _409176, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1692, 0], [1692, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         (: Arg1Type Type)", 1692, 0], [";;         (: Arg1Type Type)", 1692, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (: Arg1Type Type)", 1692, 0], [";;         (: Arg1Type Type)", 1692, 0])
   Call: (270) [system] compound_name_arguments(_303348, '$COMMENT', [";;         (: Arg1Type Type)", 1692, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT', [";;         (: Arg1Type Type)", 1692, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0)\=@='$COMMENT'(";;         (: Arg1Type Type)", 1692, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _297762)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _459348))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _459348))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _459348))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _459348))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _459348)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _459348)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _464934))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _464934))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _464934)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _464934)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _464934)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0)\=@='$COMMENT'(";;         (: Arg1Type Type)", 1692, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _459348)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _292150))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _292150))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _292150))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _292150))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _292150)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _292150)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _487254))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _487254))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _487254)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _487254)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _487254)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0)\=@='$COMMENT'(";;         (: Arg1Type Type)", 1692, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _292150)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0)))
   Call: (261) [system] '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0)\=@='$COMMENT'(";;         (: Arg1Type Type)", 1692, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _516032, [], _516034)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _516032, [], _516034)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _516032, [], _516034)
   Call: (258) [system] atom('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _516032, [], _516034)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _516032, [], _516034)
   Call: (258) [system] compound('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), _7396, _7398)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT', [";;         (: Arg1Type Type)", 1692, 0])
^  Call: (258) [user] subst_vars([";;         (: Arg1Type Type)", 1692, 0], _9282, [], _5944)
^  Unify: (258) [user] subst_vars([";;         (: Arg1Type Type)", 1692, 0], [";;         (: Arg1Type Type)", 1692, 0], [], [])
   Call: (259) [system] var([";;         (: Arg1Type Type)", 1692, 0])
^  Redo: (258) [user] subst_vars([";;         (: Arg1Type Type)", 1692, 0], _9282, [], _5944)
^  Unify: (258) [user] subst_vars([";;         (: Arg1Type Type)", 1692, 0], [_13018|_13020], [], _5944)
^  Call: (259) [user] subst_vars(";;         (: Arg1Type Type)", _13018, [], _13958)
^  Unify: (259) [user] subst_vars(";;         (: Arg1Type Type)", ";;         (: Arg1Type Type)", [], [])
   Call: (260) [system] var(";;         (: Arg1Type Type)")
^  Redo: (259) [user] subst_vars(";;         (: Arg1Type Type)", _13018, [], _13958)
^  Unify: (259) [user] subst_vars(";;         (: Arg1Type Type)", _13018, [], _13958)
   Call: (260) [system] atom(";;         (: Arg1Type Type)")
^  Redo: (259) [user] subst_vars(";;         (: Arg1Type Type)", _13018, [], _13958)
^  Unify: (259) [user] subst_vars(";;         (: Arg1Type Type)", _13018, [], _13958)
   Call: (260) [system] compound(";;         (: Arg1Type Type)")
^  Redo: (259) [user] subst_vars(";;         (: Arg1Type Type)", _13018, [], _13958)
^  Unify: (259) [user] subst_vars(";;         (: Arg1Type Type)", ";;         (: Arg1Type Type)", [], [])
^  Exit: (259) [user] subst_vars(";;         (: Arg1Type Type)", ";;         (: Arg1Type Type)", [], [])
^  Call: (259) [user] subst_vars([1692, 0], _13020, [], _5944)
^  Unify: (259) [user] subst_vars([1692, 0], [1692, 0], [], [])
   Call: (260) [system] var([1692, 0])
^  Redo: (259) [user] subst_vars([1692, 0], _13020, [], _5944)
^  Unify: (259) [user] subst_vars([1692, 0], [_28890|_28892], [], _5944)
^  Call: (260) [user] subst_vars(1692, _28890, [], _29830)
^  Unify: (260) [user] subst_vars(1692, 1692, [], [])
   Call: (261) [system] var(1692)
^  Redo: (260) [user] subst_vars(1692, _28890, [], _29830)
^  Unify: (260) [user] subst_vars(1692, _28890, [], _29830)
   Call: (261) [system] atom(1692)
^  Redo: (260) [user] subst_vars(1692, _28890, [], _29830)
^  Unify: (260) [user] subst_vars(1692, _28890, [], _29830)
   Call: (261) [system] compound(1692)
^  Redo: (260) [user] subst_vars(1692, _28890, [], _29830)
^  Unify: (260) [user] subst_vars(1692, 1692, [], [])
^  Exit: (260) [user] subst_vars(1692, 1692, [], [])
^  Call: (260) [user] subst_vars([0], _28892, [], _5944)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _28892, [], _5944)
^  Unify: (260) [user] subst_vars([0], [_44762|_44764], [], _5944)
^  Call: (261) [user] subst_vars(0, _44762, [], _45702)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _44762, [], _45702)
^  Unify: (261) [user] subst_vars(0, _44762, [], _45702)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _44762, [], _45702)
^  Unify: (261) [user] subst_vars(0, _44762, [], _45702)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _44762, [], _45702)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _44764, [], _5944)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _44764, [], _5944)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1692, 0], [1692, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         (: Arg1Type Type)", 1692, 0], [";;         (: Arg1Type Type)", 1692, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5942, '$COMMENT', [";;         (: Arg1Type Type)", 1692, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT', [";;         (: Arg1Type Type)", 1692, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), [], [])
   Call: (257) [system] _68120=metta_file_buffer(+, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: Arg1Type Type)", 1692, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1693, 0, 60520, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$stream_position'(60520, 1693, 0, 60554)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _120842))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _120842))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _120842)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _120842)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _120842)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _120842)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _126454))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _126454))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _126454))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _126454))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _126454)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _126454)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _132040))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _132040))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _132040)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _132040)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _132040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _132040)
   Call: (270) [system] var('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _132040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$VAR'(_139500))
   Call: (270) [system] atom('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _132040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _132040)
   Call: (270) [system] '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _132040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _132040)
   Call: (270) [system] '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _132040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _132040)
   Call: (270) [system] '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0)==[_148780, _148786]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _132040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _132040)
   Call: (270) [system] is_list('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _132040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _132040)
   Call: (270) [system] string('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _132040)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _132040)
   Call: (270) [system] compound('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _158982, _158984)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT', [";;         (: Arg2Type Type)", 1693, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         (: Arg2Type Type)", 1693, 0], _162724)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (: Arg2Type Type)", 1693, 0], _162724)
   Call: (271) [apply] apply:maplist_([";;         (: Arg2Type Type)", 1693, 0], _162724, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         (: Arg2Type Type)", 1693, 0], [_165542|_165544], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _165542)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _165542)
   Call: (273) [system] var(";;         (: Arg2Type Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _165542)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", '$VAR'(_170188))
   Call: (273) [system] atom(";;         (: Arg2Type Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _165542)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _165542)
   Call: (273) [system] ";;         (: Arg2Type Type)"==true
^  Redo: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _165542)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _165542)
   Call: (273) [system] ";;         (: Arg2Type Type)"==false
^  Redo: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _165542)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _165542)
   Call: (273) [system] ";;         (: Arg2Type Type)"==[_179468, _179474]
^  Redo: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _165542)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _165542)
   Call: (273) [system] is_list(";;         (: Arg2Type Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _165542)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _165542)
   Call: (273) [system] string(";;         (: Arg2Type Type)")
   Exit: (273) [system] string(";;         (: Arg2Type Type)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _165542)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _165542)
   Call: (273) [system] compound(";;         (: Arg2Type Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _165542)
^  Unify: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _165542)
^  Call: (273) [user] symbol(";;         (: Arg2Type Type)")
^  Unify: (273) [user] symbol(";;         (: Arg2Type Type)")
   Call: (274) [system] atom(";;         (: Arg2Type Type)")
   Fail: (274) [system] atom(";;         (: Arg2Type Type)")
^  Fail: (273) [user] symbol(";;         (: Arg2Type Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", _165542)
   Call: (273) [system] ";;         (: Arg2Type Type)"=_165542
   Exit: (273) [system] ";;         (: Arg2Type Type)"=";;         (: Arg2Type Type)"
^  Exit: (272) [user] mfix_vars1(";;         (: Arg2Type Type)", ";;         (: Arg2Type Type)")
   Call: (272) [apply] apply:maplist_([1693, 0], _165544, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1693, 0], [_203540|_203542], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1693, _203540)
^  Unify: (273) [user] mfix_vars1(1693, _203540)
   Call: (274) [system] var(1693)
^  Redo: (273) [user] mfix_vars1(1693, _203540)
^  Unify: (273) [user] mfix_vars1(1693, '$VAR'(_208186))
   Call: (274) [system] atom(1693)
^  Redo: (273) [user] mfix_vars1(1693, _203540)
^  Unify: (273) [user] mfix_vars1(1693, _203540)
   Call: (274) [system] 1693==true
^  Redo: (273) [user] mfix_vars1(1693, _203540)
^  Unify: (273) [user] mfix_vars1(1693, _203540)
   Call: (274) [system] 1693==false
^  Redo: (273) [user] mfix_vars1(1693, _203540)
^  Unify: (273) [user] mfix_vars1(1693, _203540)
   Call: (274) [system] 1693==[_217466, _217472]
^  Redo: (273) [user] mfix_vars1(1693, _203540)
^  Unify: (273) [user] mfix_vars1(1693, _203540)
   Call: (274) [system] is_list(1693)
^  Redo: (273) [user] mfix_vars1(1693, _203540)
^  Unify: (273) [user] mfix_vars1(1693, _203540)
   Call: (274) [system] string(1693)
^  Redo: (273) [user] mfix_vars1(1693, _203540)
^  Unify: (273) [user] mfix_vars1(1693, _203540)
   Call: (274) [system] compound(1693)
^  Redo: (273) [user] mfix_vars1(1693, _203540)
^  Unify: (273) [user] mfix_vars1(1693, _203540)
^  Call: (274) [user] symbol(1693)
^  Unify: (274) [user] symbol(1693)
   Call: (275) [system] atom(1693)
   Fail: (275) [system] atom(1693)
^  Fail: (274) [user] symbol(1693)
^  Redo: (273) [user] mfix_vars1(1693, _203540)
   Call: (274) [system] 1693=_203540
   Exit: (274) [system] 1693=1693
^  Exit: (273) [user] mfix_vars1(1693, 1693)
   Call: (273) [apply] apply:maplist_([0], _203542, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_237866|_237868], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _237866)
^  Unify: (274) [user] mfix_vars1(0, _237866)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _237866)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_242512))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _237866)
^  Unify: (274) [user] mfix_vars1(0, _237866)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _237866)
^  Unify: (274) [user] mfix_vars1(0, _237866)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _237866)
^  Unify: (274) [user] mfix_vars1(0, _237866)
   Call: (275) [system] 0==[_251792, _251798]
^  Redo: (274) [user] mfix_vars1(0, _237866)
^  Unify: (274) [user] mfix_vars1(0, _237866)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _237866)
^  Unify: (274) [user] mfix_vars1(0, _237866)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _237866)
^  Unify: (274) [user] mfix_vars1(0, _237866)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _237866)
^  Unify: (274) [user] mfix_vars1(0, _237866)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _237866)
   Call: (275) [system] 0=_237866
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _237868, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1693, 0], [1693, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         (: Arg2Type Type)", 1693, 0], [";;         (: Arg2Type Type)", 1693, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (: Arg2Type Type)", 1693, 0], [";;         (: Arg2Type Type)", 1693, 0])
   Call: (270) [system] compound_name_arguments(_132040, '$COMMENT', [";;         (: Arg2Type Type)", 1693, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT', [";;         (: Arg2Type Type)", 1693, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0)\=@='$COMMENT'(";;         (: Arg2Type Type)", 1693, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _126454)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _288040))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _288040))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _288040))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _288040))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _288040)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _288040)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _293626))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _293626))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _293626)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _293626)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _293626)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0)\=@='$COMMENT'(";;         (: Arg2Type Type)", 1693, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _288040)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _120842))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _120842))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _120842))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _120842))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _120842)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _120842)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _315946))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _315946))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _315946)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _315946)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _315946)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0)\=@='$COMMENT'(";;         (: Arg2Type Type)", 1693, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _120842)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0)))
   Call: (261) [system] '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0)\=@='$COMMENT'(";;         (: Arg2Type Type)", 1693, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _344724, [], _344726)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _344724, [], _344726)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _344724, [], _344726)
   Call: (258) [system] atom('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _344724, [], _344726)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _344724, [], _344726)
   Call: (258) [system] compound('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), _354040, _354042)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT', [";;         (: Arg2Type Type)", 1693, 0])
^  Call: (258) [user] subst_vars([";;         (: Arg2Type Type)", 1693, 0], _355926, [], _344726)
^  Unify: (258) [user] subst_vars([";;         (: Arg2Type Type)", 1693, 0], [";;         (: Arg2Type Type)", 1693, 0], [], [])
   Call: (259) [system] var([";;         (: Arg2Type Type)", 1693, 0])
^  Redo: (258) [user] subst_vars([";;         (: Arg2Type Type)", 1693, 0], _355926, [], _344726)
^  Unify: (258) [user] subst_vars([";;         (: Arg2Type Type)", 1693, 0], [_359662|_359664], [], _344726)
^  Call: (259) [user] subst_vars(";;         (: Arg2Type Type)", _359662, [], _360602)
^  Unify: (259) [user] subst_vars(";;         (: Arg2Type Type)", ";;         (: Arg2Type Type)", [], [])
   Call: (260) [system] var(";;         (: Arg2Type Type)")
^  Redo: (259) [user] subst_vars(";;         (: Arg2Type Type)", _359662, [], _360602)
^  Unify: (259) [user] subst_vars(";;         (: Arg2Type Type)", _359662, [], _360602)
   Call: (260) [system] atom(";;         (: Arg2Type Type)")
^  Redo: (259) [user] subst_vars(";;         (: Arg2Type Type)", _359662, [], _360602)
^  Unify: (259) [user] subst_vars(";;         (: Arg2Type Type)", _359662, [], _360602)
   Call: (260) [system] compound(";;         (: Arg2Type Type)")
^  Redo: (259) [user] subst_vars(";;         (: Arg2Type Type)", _359662, [], _360602)
^  Unify: (259) [user] subst_vars(";;         (: Arg2Type Type)", ";;         (: Arg2Type Type)", [], [])
^  Exit: (259) [user] subst_vars(";;         (: Arg2Type Type)", ";;         (: Arg2Type Type)", [], [])
^  Call: (259) [user] subst_vars([1693, 0], _359664, [], _344726)
^  Unify: (259) [user] subst_vars([1693, 0], [1693, 0], [], [])
   Call: (260) [system] var([1693, 0])
^  Redo: (259) [user] subst_vars([1693, 0], _359664, [], _344726)
^  Unify: (259) [user] subst_vars([1693, 0], [_375534|_375536], [], _344726)
^  Call: (260) [user] subst_vars(1693, _375534, [], _376474)
^  Unify: (260) [user] subst_vars(1693, 1693, [], [])
   Call: (261) [system] var(1693)
^  Redo: (260) [user] subst_vars(1693, _375534, [], _376474)
^  Unify: (260) [user] subst_vars(1693, _375534, [], _376474)
   Call: (261) [system] atom(1693)
^  Redo: (260) [user] subst_vars(1693, _375534, [], _376474)
^  Unify: (260) [user] subst_vars(1693, _375534, [], _376474)
   Call: (261) [system] compound(1693)
^  Redo: (260) [user] subst_vars(1693, _375534, [], _376474)
^  Unify: (260) [user] subst_vars(1693, 1693, [], [])
^  Exit: (260) [user] subst_vars(1693, 1693, [], [])
^  Call: (260) [user] subst_vars([0], _375536, [], _344726)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _375536, [], _344726)
^  Unify: (260) [user] subst_vars([0], [_391406|_391408], [], _344726)
^  Call: (261) [user] subst_vars(0, _391406, [], _392346)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _391406, [], _392346)
^  Unify: (261) [user] subst_vars(0, _391406, [], _392346)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _391406, [], _392346)
^  Unify: (261) [user] subst_vars(0, _391406, [], _392346)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _391406, [], _392346)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _391408, [], _344726)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _391408, [], _344726)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1693, 0], [1693, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         (: Arg2Type Type)", 1693, 0], [";;         (: Arg2Type Type)", 1693, 0], [], [])
   Call: (258) [system] compound_name_arguments(_344724, '$COMMENT', [";;         (: Arg2Type Type)", 1693, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT', [";;         (: Arg2Type Type)", 1693, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), [], [])
   Call: (257) [system] _414764=metta_file_buffer(+, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: Arg2Type Type)", 1693, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1694, 0, 60549, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$stream_position'(60549, 1694, 0, 60583)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _467486))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _467486))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _467486)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _467486)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _467486)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _467486)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _473098))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _473098))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _473098))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _473098))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _473098)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _473098)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _478684))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _478684))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _478684)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _478684)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _478684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _478684)
   Call: (270) [system] var('$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _478684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$VAR'(_486144))
   Call: (270) [system] atom('$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _478684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _478684)
   Call: (270) [system] '$COMMENT'(";;         (: ReturnType Type)", 1694, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _478684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _478684)
   Call: (270) [system] '$COMMENT'(";;         (: ReturnType Type)", 1694, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _478684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _478684)
   Call: (270) [system] '$COMMENT'(";;         (: ReturnType Type)", 1694, 0)==[_495424, _495430]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _478684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _478684)
   Call: (270) [system] is_list('$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _478684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _478684)
   Call: (270) [system] string('$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _478684)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _478684)
   Call: (270) [system] compound('$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _505626, _505628)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT', [";;         (: ReturnType Type)", 1694, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         (: ReturnType Type)", 1694, 0], _509368)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (: ReturnType Type)", 1694, 0], _509368)
   Call: (271) [apply] apply:maplist_([";;         (: ReturnType Type)", 1694, 0], _509368, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         (: ReturnType Type)", 1694, 0], [_512186|_512188], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _512186)
^  Unify: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _512186)
   Call: (273) [system] var(";;         (: ReturnType Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _512186)
^  Unify: (272) [user] mfix_vars1(";;         (: ReturnType Type)", '$VAR'(_516832))
   Call: (273) [system] atom(";;         (: ReturnType Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _512186)
^  Unify: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _512186)
   Call: (273) [system] ";;         (: ReturnType Type)"==true
^  Redo: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _512186)
^  Unify: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _512186)
   Call: (273) [system] ";;         (: ReturnType Type)"==false
^  Redo: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _6028)
^  Unify: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _6028)
   Call: (273) [system] ";;         (: ReturnType Type)"==[_8242, _8248]
^  Redo: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _6028)
^  Unify: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _6028)
   Call: (273) [system] is_list(";;         (: ReturnType Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _6028)
^  Unify: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _6028)
   Call: (273) [system] string(";;         (: ReturnType Type)")
   Exit: (273) [system] string(";;         (: ReturnType Type)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _6028)
^  Unify: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _6028)
   Call: (273) [system] compound(";;         (: ReturnType Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _6028)
^  Unify: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _6028)
^  Call: (273) [user] symbol(";;         (: ReturnType Type)")
^  Unify: (273) [user] symbol(";;         (: ReturnType Type)")
   Call: (274) [system] atom(";;         (: ReturnType Type)")
   Fail: (274) [system] atom(";;         (: ReturnType Type)")
^  Fail: (273) [user] symbol(";;         (: ReturnType Type)")
^  Redo: (272) [user] mfix_vars1(";;         (: ReturnType Type)", _6028)
   Call: (273) [system] ";;         (: ReturnType Type)"=_6028
   Exit: (273) [system] ";;         (: ReturnType Type)"=";;         (: ReturnType Type)"
^  Exit: (272) [user] mfix_vars1(";;         (: ReturnType Type)", ";;         (: ReturnType Type)")
   Call: (272) [apply] apply:maplist_([1694, 0], _6030, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1694, 0], [_32314|_32316], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1694, _32314)
^  Unify: (273) [user] mfix_vars1(1694, _32314)
   Call: (274) [system] var(1694)
^  Redo: (273) [user] mfix_vars1(1694, _32314)
^  Unify: (273) [user] mfix_vars1(1694, '$VAR'(_36960))
   Call: (274) [system] atom(1694)
^  Redo: (273) [user] mfix_vars1(1694, _32314)
^  Unify: (273) [user] mfix_vars1(1694, _32314)
   Call: (274) [system] 1694==true
^  Redo: (273) [user] mfix_vars1(1694, _32314)
^  Unify: (273) [user] mfix_vars1(1694, _32314)
   Call: (274) [system] 1694==false
^  Redo: (273) [user] mfix_vars1(1694, _32314)
^  Unify: (273) [user] mfix_vars1(1694, _32314)
   Call: (274) [system] 1694==[_46240, _46246]
^  Redo: (273) [user] mfix_vars1(1694, _32314)
^  Unify: (273) [user] mfix_vars1(1694, _32314)
   Call: (274) [system] is_list(1694)
^  Redo: (273) [user] mfix_vars1(1694, _32314)
^  Unify: (273) [user] mfix_vars1(1694, _32314)
   Call: (274) [system] string(1694)
^  Redo: (273) [user] mfix_vars1(1694, _32314)
^  Unify: (273) [user] mfix_vars1(1694, _32314)
   Call: (274) [system] compound(1694)
^  Redo: (273) [user] mfix_vars1(1694, _32314)
^  Unify: (273) [user] mfix_vars1(1694, _32314)
^  Call: (274) [user] symbol(1694)
^  Unify: (274) [user] symbol(1694)
   Call: (275) [system] atom(1694)
   Fail: (275) [system] atom(1694)
^  Fail: (274) [user] symbol(1694)
^  Redo: (273) [user] mfix_vars1(1694, _32314)
   Call: (274) [system] 1694=_32314
   Exit: (274) [system] 1694=1694
^  Exit: (273) [user] mfix_vars1(1694, 1694)
   Call: (273) [apply] apply:maplist_([0], _32316, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_66640|_66642], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _66640)
^  Unify: (274) [user] mfix_vars1(0, _66640)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _66640)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_71286))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _66640)
^  Unify: (274) [user] mfix_vars1(0, _66640)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _66640)
^  Unify: (274) [user] mfix_vars1(0, _66640)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _66640)
^  Unify: (274) [user] mfix_vars1(0, _66640)
   Call: (275) [system] 0==[_80566, _80572]
^  Redo: (274) [user] mfix_vars1(0, _66640)
^  Unify: (274) [user] mfix_vars1(0, _66640)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _66640)
^  Unify: (274) [user] mfix_vars1(0, _66640)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _66640)
^  Unify: (274) [user] mfix_vars1(0, _66640)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _66640)
^  Unify: (274) [user] mfix_vars1(0, _66640)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _66640)
   Call: (275) [system] 0=_66640
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _66642, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1694, 0], [1694, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         (: ReturnType Type)", 1694, 0], [";;         (: ReturnType Type)", 1694, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (: ReturnType Type)", 1694, 0], [";;         (: ReturnType Type)", 1694, 0])
   Call: (270) [system] compound_name_arguments(_5982, '$COMMENT', [";;         (: ReturnType Type)", 1694, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT', [";;         (: ReturnType Type)", 1694, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: ReturnType Type)", 1694, 0)\=@='$COMMENT'(";;         (: ReturnType Type)", 1694, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _5968)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _116814))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _116814))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _116814))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _116814))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _116814)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _116814)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _122400))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _122400))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _122400)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _122400)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _122400)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: ReturnType Type)", 1694, 0)\=@='$COMMENT'(";;         (: ReturnType Type)", 1694, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _116814)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _5948))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _5948))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _5948))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _5948))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _5948)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _144720))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _144720))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _144720)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _144720)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _144720)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: ReturnType Type)", 1694, 0)\=@='$COMMENT'(";;         (: ReturnType Type)", 1694, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0)))
   Call: (261) [system] '$COMMENT'(";;         (: ReturnType Type)", 1694, 0)\=@='$COMMENT'(";;         (: ReturnType Type)", 1694, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _173498, [], _173500)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _173498, [], _173500)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _173498, [], _173500)
   Call: (258) [system] atom('$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _173498, [], _173500)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _173498, [], _173500)
   Call: (258) [system] compound('$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         (: ReturnType Type)", 1694, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), _182814, _182816)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT', [";;         (: ReturnType Type)", 1694, 0])
^  Call: (258) [user] subst_vars([";;         (: ReturnType Type)", 1694, 0], _184700, [], _173500)
^  Unify: (258) [user] subst_vars([";;         (: ReturnType Type)", 1694, 0], [";;         (: ReturnType Type)", 1694, 0], [], [])
   Call: (259) [system] var([";;         (: ReturnType Type)", 1694, 0])
^  Redo: (258) [user] subst_vars([";;         (: ReturnType Type)", 1694, 0], _184700, [], _173500)
^  Unify: (258) [user] subst_vars([";;         (: ReturnType Type)", 1694, 0], [_188436|_188438], [], _173500)
^  Call: (259) [user] subst_vars(";;         (: ReturnType Type)", _188436, [], _189376)
^  Unify: (259) [user] subst_vars(";;         (: ReturnType Type)", ";;         (: ReturnType Type)", [], [])
   Call: (260) [system] var(";;         (: ReturnType Type)")
^  Redo: (259) [user] subst_vars(";;         (: ReturnType Type)", _188436, [], _189376)
^  Unify: (259) [user] subst_vars(";;         (: ReturnType Type)", _188436, [], _189376)
   Call: (260) [system] atom(";;         (: ReturnType Type)")
^  Redo: (259) [user] subst_vars(";;         (: ReturnType Type)", _188436, [], _189376)
^  Unify: (259) [user] subst_vars(";;         (: ReturnType Type)", _188436, [], _189376)
   Call: (260) [system] compound(";;         (: ReturnType Type)")
^  Redo: (259) [user] subst_vars(";;         (: ReturnType Type)", _188436, [], _189376)
^  Unify: (259) [user] subst_vars(";;         (: ReturnType Type)", ";;         (: ReturnType Type)", [], [])
^  Exit: (259) [user] subst_vars(";;         (: ReturnType Type)", ";;         (: ReturnType Type)", [], [])
^  Call: (259) [user] subst_vars([1694, 0], _188438, [], _173500)
^  Unify: (259) [user] subst_vars([1694, 0], [1694, 0], [], [])
   Call: (260) [system] var([1694, 0])
^  Redo: (259) [user] subst_vars([1694, 0], _188438, [], _173500)
^  Unify: (259) [user] subst_vars([1694, 0], [_204308|_204310], [], _173500)
^  Call: (260) [user] subst_vars(1694, _204308, [], _205248)
^  Unify: (260) [user] subst_vars(1694, 1694, [], [])
   Call: (261) [system] var(1694)
^  Redo: (260) [user] subst_vars(1694, _204308, [], _205248)
^  Unify: (260) [user] subst_vars(1694, _204308, [], _205248)
   Call: (261) [system] atom(1694)
^  Redo: (260) [user] subst_vars(1694, _204308, [], _205248)
^  Unify: (260) [user] subst_vars(1694, _204308, [], _205248)
   Call: (261) [system] compound(1694)
^  Redo: (260) [user] subst_vars(1694, _204308, [], _205248)
^  Unify: (260) [user] subst_vars(1694, 1694, [], [])
^  Exit: (260) [user] subst_vars(1694, 1694, [], [])
^  Call: (260) [user] subst_vars([0], _204310, [], _173500)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _204310, [], _173500)
^  Unify: (260) [user] subst_vars([0], [_220180|_220182], [], _173500)
^  Call: (261) [user] subst_vars(0, _220180, [], _221120)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _220180, [], _221120)
^  Unify: (261) [user] subst_vars(0, _220180, [], _221120)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _220180, [], _221120)
^  Unify: (261) [user] subst_vars(0, _220180, [], _221120)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _220180, [], _221120)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _220182, [], _173500)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _220182, [], _173500)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1694, 0], [1694, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         (: ReturnType Type)", 1694, 0], [";;         (: ReturnType Type)", 1694, 0], [], [])
   Call: (258) [system] compound_name_arguments(_173498, '$COMMENT', [";;         (: ReturnType Type)", 1694, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT', [";;         (: ReturnType Type)", 1694, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         (: ReturnType Type)", 1694, 0), '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), [], [])
   Call: (257) [system] _243538=metta_file_buffer(+, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: ReturnType Type)", 1694, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1695, 0, 60580, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$stream_position'(60580, 1695, 0, 60614)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _296268))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _296268))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _296268)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _296268)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _296268)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _296268)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _301880))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _301880))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _301880))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _301880))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _301880)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _301880)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _307466))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _307466))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _307466)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _307466)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _307466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _307466)
   Call: (270) [system] var('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _307466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$VAR'(_314926))
   Call: (270) [system] atom('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _307466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _307466)
   Call: (270) [system] '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _307466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _307466)
   Call: (270) [system] '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _307466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _307466)
   Call: (270) [system] '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0)==[_324206, _324212]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _307466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _307466)
   Call: (270) [system] is_list('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _307466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _307466)
   Call: (270) [system] string('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _307466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _307466)
   Call: (270) [system] compound('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _334408, _334410)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT', [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0], _338150)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0], _338150)
   Call: (271) [apply] apply:maplist_([";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0], _338150, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0], [_340968|_340970], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _340968)
^  Unify: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _340968)
   Call: (273) [system] var(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
^  Redo: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _340968)
^  Unify: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", '$VAR'(_345614))
   Call: (273) [system] atom(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
^  Redo: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _340968)
^  Unify: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _340968)
   Call: (273) [system] ";;         (: some-func (-> Arg1Type Arg2Type ReturnType))"==true
^  Redo: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _340968)
^  Unify: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _340968)
   Call: (273) [system] ";;         (: some-func (-> Arg1Type Arg2Type ReturnType))"==false
^  Redo: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _340968)
^  Unify: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _340968)
   Call: (273) [system] ";;         (: some-func (-> Arg1Type Arg2Type ReturnType))"==[_354894, _354900]
^  Redo: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _340968)
^  Unify: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _340968)
   Call: (273) [system] is_list(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
^  Redo: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _340968)
^  Unify: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _340968)
   Call: (273) [system] string(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
   Exit: (273) [system] string(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _340968)
^  Unify: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _340968)
   Call: (273) [system] compound(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
^  Redo: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _340968)
^  Unify: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _340968)
^  Call: (273) [user] symbol(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
^  Unify: (273) [user] symbol(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
   Call: (274) [system] atom(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
   Fail: (274) [system] atom(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
^  Fail: (273) [user] symbol(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
^  Redo: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _340968)
   Call: (273) [system] ";;         (: some-func (-> Arg1Type Arg2Type ReturnType))"=_340968
   Exit: (273) [system] ";;         (: some-func (-> Arg1Type Arg2Type ReturnType))"=";;         (: some-func (-> Arg1Type Arg2Type ReturnType))"
^  Exit: (272) [user] mfix_vars1(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", ";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
   Call: (272) [apply] apply:maplist_([1695, 0], _340970, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1695, 0], [_378966|_378968], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1695, _378966)
^  Unify: (273) [user] mfix_vars1(1695, _378966)
   Call: (274) [system] var(1695)
^  Redo: (273) [user] mfix_vars1(1695, _378966)
^  Unify: (273) [user] mfix_vars1(1695, '$VAR'(_383612))
   Call: (274) [system] atom(1695)
^  Redo: (273) [user] mfix_vars1(1695, _378966)
^  Unify: (273) [user] mfix_vars1(1695, _378966)
   Call: (274) [system] 1695==true
^  Redo: (273) [user] mfix_vars1(1695, _378966)
^  Unify: (273) [user] mfix_vars1(1695, _378966)
   Call: (274) [system] 1695==false
^  Redo: (273) [user] mfix_vars1(1695, _378966)
^  Unify: (273) [user] mfix_vars1(1695, _378966)
   Call: (274) [system] 1695==[_392892, _392898]
^  Redo: (273) [user] mfix_vars1(1695, _378966)
^  Unify: (273) [user] mfix_vars1(1695, _378966)
   Call: (274) [system] is_list(1695)
^  Redo: (273) [user] mfix_vars1(1695, _378966)
^  Unify: (273) [user] mfix_vars1(1695, _378966)
   Call: (274) [system] string(1695)
^  Redo: (273) [user] mfix_vars1(1695, _378966)
^  Unify: (273) [user] mfix_vars1(1695, _378966)
   Call: (274) [system] compound(1695)
^  Redo: (273) [user] mfix_vars1(1695, _378966)
^  Unify: (273) [user] mfix_vars1(1695, _378966)
^  Call: (274) [user] symbol(1695)
^  Unify: (274) [user] symbol(1695)
   Call: (275) [system] atom(1695)
   Fail: (275) [system] atom(1695)
^  Fail: (274) [user] symbol(1695)
^  Redo: (273) [user] mfix_vars1(1695, _378966)
   Call: (274) [system] 1695=_378966
   Exit: (274) [system] 1695=1695
^  Exit: (273) [user] mfix_vars1(1695, 1695)
   Call: (273) [apply] apply:maplist_([0], _378968, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_413292|_413294], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _413292)
^  Unify: (274) [user] mfix_vars1(0, _413292)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _413292)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_417938))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _413292)
^  Unify: (274) [user] mfix_vars1(0, _413292)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _413292)
^  Unify: (274) [user] mfix_vars1(0, _413292)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _413292)
^  Unify: (274) [user] mfix_vars1(0, _413292)
   Call: (275) [system] 0==[_427218, _427224]
^  Redo: (274) [user] mfix_vars1(0, _413292)
^  Unify: (274) [user] mfix_vars1(0, _413292)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _413292)
^  Unify: (274) [user] mfix_vars1(0, _413292)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _413292)
^  Unify: (274) [user] mfix_vars1(0, _413292)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _413292)
^  Unify: (274) [user] mfix_vars1(0, _413292)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _413292)
   Call: (275) [system] 0=_413292
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _413294, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1695, 0], [1695, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0], [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0], [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0])
   Call: (270) [system] compound_name_arguments(_307466, '$COMMENT', [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT', [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0)\=@='$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _301880)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _463466))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _463466))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _463466))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _463466))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _463466)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _463466)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _469052))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _469052))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _469052)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _469052)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _469052)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0)\=@='$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _463466)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _296268))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _296268))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _296268))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _296268))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _296268)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _296268)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _491372))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _491372))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _491372)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _491372)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _491372)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0)))
   Call: (267) [system] '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0)\=@='$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _296268)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0)))
   Call: (261) [system] '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0)\=@='$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _520150, [], _520152)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _520150, [], _520152)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _5950, [], _5952)
   Call: (258) [system] atom('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _5950, [], _5952)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _5950, [], _5952)
   Call: (258) [system] compound('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), _11402, _11404)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT', [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0])
^  Call: (258) [user] subst_vars([";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0], _13288, [], _5952)
^  Unify: (258) [user] subst_vars([";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0], [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0], [], [])
   Call: (259) [system] var([";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0])
^  Redo: (258) [user] subst_vars([";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0], _13288, [], _5952)
^  Unify: (258) [user] subst_vars([";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0], [_17024|_17026], [], _5952)
^  Call: (259) [user] subst_vars(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _17024, [], _17964)
^  Unify: (259) [user] subst_vars(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", ";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", [], [])
   Call: (260) [system] var(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
^  Redo: (259) [user] subst_vars(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _17024, [], _17964)
^  Unify: (259) [user] subst_vars(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _17024, [], _17964)
   Call: (260) [system] atom(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
^  Redo: (259) [user] subst_vars(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _17024, [], _17964)
^  Unify: (259) [user] subst_vars(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _17024, [], _17964)
   Call: (260) [system] compound(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))")
^  Redo: (259) [user] subst_vars(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", _17024, [], _17964)
^  Unify: (259) [user] subst_vars(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", ";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", [], [])
^  Exit: (259) [user] subst_vars(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", ";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", [], [])
^  Call: (259) [user] subst_vars([1695, 0], _17026, [], _5952)
^  Unify: (259) [user] subst_vars([1695, 0], [1695, 0], [], [])
   Call: (260) [system] var([1695, 0])
^  Redo: (259) [user] subst_vars([1695, 0], _17026, [], _5952)
^  Unify: (259) [user] subst_vars([1695, 0], [_32896|_32898], [], _5952)
^  Call: (260) [user] subst_vars(1695, _32896, [], _33836)
^  Unify: (260) [user] subst_vars(1695, 1695, [], [])
   Call: (261) [system] var(1695)
^  Redo: (260) [user] subst_vars(1695, _32896, [], _33836)
^  Unify: (260) [user] subst_vars(1695, _32896, [], _33836)
   Call: (261) [system] atom(1695)
^  Redo: (260) [user] subst_vars(1695, _32896, [], _33836)
^  Unify: (260) [user] subst_vars(1695, _32896, [], _33836)
   Call: (261) [system] compound(1695)
^  Redo: (260) [user] subst_vars(1695, _32896, [], _33836)
^  Unify: (260) [user] subst_vars(1695, 1695, [], [])
^  Exit: (260) [user] subst_vars(1695, 1695, [], [])
^  Call: (260) [user] subst_vars([0], _32898, [], _5952)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _32898, [], _5952)
^  Unify: (260) [user] subst_vars([0], [_48768|_48770], [], _5952)
^  Call: (261) [user] subst_vars(0, _48768, [], _49708)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _48768, [], _49708)
^  Unify: (261) [user] subst_vars(0, _48768, [], _49708)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _48768, [], _49708)
^  Unify: (261) [user] subst_vars(0, _48768, [], _49708)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _48768, [], _49708)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _48770, [], _5952)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _48770, [], _5952)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1695, 0], [1695, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0], [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5950, '$COMMENT', [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT', [";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), [], [])
   Call: (257) [system] _72126=metta_file_buffer(+, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (: some-func (-> Arg1Type Arg2Type ReturnType))", 1695, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1696, 0, 60639, '$COMMENT'(";;         (@doc some-func", 1696, 0), '$stream_position'(60639, 1696, 0, 60673)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc some-func", 1696, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc some-func", 1696, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         (@doc some-func", 1696, 0), _124848))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (@doc some-func", 1696, 0), _124848))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         (@doc some-func", 1696, 0), _124848)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (@doc some-func", 1696, 0), _124848)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         (@doc some-func", 1696, 0), _124848)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         (@doc some-func", 1696, 0), _124848)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1696, 0), _130460))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1696, 0), _130460))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1696, 0), _130460))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1696, 0), _130460))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1696, 0), _130460)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1696, 0), _130460)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1696, 0), _136046))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1696, 0), _136046))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1696, 0), _136046)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1696, 0), _136046)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1696, 0), _136046)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1696, 0), _136046)
   Call: (270) [system] var('$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1696, 0), _136046)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1696, 0), '$VAR'(_143506))
   Call: (270) [system] atom('$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1696, 0), _136046)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1696, 0), _136046)
   Call: (270) [system] '$COMMENT'(";;         (@doc some-func", 1696, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1696, 0), _136046)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1696, 0), _136046)
   Call: (270) [system] '$COMMENT'(";;         (@doc some-func", 1696, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1696, 0), _136046)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1696, 0), _136046)
   Call: (270) [system] '$COMMENT'(";;         (@doc some-func", 1696, 0)==[_152786, _152792]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1696, 0), _136046)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1696, 0), _136046)
   Call: (270) [system] is_list('$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1696, 0), _136046)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1696, 0), _136046)
   Call: (270) [system] string('$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1696, 0), _136046)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1696, 0), _136046)
   Call: (270) [system] compound('$COMMENT'(";;         (@doc some-func", 1696, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         (@doc some-func", 1696, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-func", 1696, 0), _162988, _162990)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT', [";;         (@doc some-func", 1696, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         (@doc some-func", 1696, 0], _166730)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (@doc some-func", 1696, 0], _166730)
   Call: (271) [apply] apply:maplist_([";;         (@doc some-func", 1696, 0], _166730, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         (@doc some-func", 1696, 0], [_169548|_169550], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         (@doc some-func", _169548)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func", _169548)
   Call: (273) [system] var(";;         (@doc some-func")
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func", _169548)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func", '$VAR'(_174194))
   Call: (273) [system] atom(";;         (@doc some-func")
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func", _169548)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func", _169548)
   Call: (273) [system] ";;         (@doc some-func"==true
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func", _169548)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func", _169548)
   Call: (273) [system] ";;         (@doc some-func"==false
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func", _169548)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func", _169548)
   Call: (273) [system] ";;         (@doc some-func"==[_183474, _183480]
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func", _169548)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func", _169548)
   Call: (273) [system] is_list(";;         (@doc some-func")
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func", _169548)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func", _169548)
   Call: (273) [system] string(";;         (@doc some-func")
   Exit: (273) [system] string(";;         (@doc some-func")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func", _169548)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func", _169548)
   Call: (273) [system] compound(";;         (@doc some-func")
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func", _169548)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func", _169548)
^  Call: (273) [user] symbol(";;         (@doc some-func")
^  Unify: (273) [user] symbol(";;         (@doc some-func")
   Call: (274) [system] atom(";;         (@doc some-func")
   Fail: (274) [system] atom(";;         (@doc some-func")
^  Fail: (273) [user] symbol(";;         (@doc some-func")
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func", _169548)
   Call: (273) [system] ";;         (@doc some-func"=_169548
   Exit: (273) [system] ";;         (@doc some-func"=";;         (@doc some-func"
^  Exit: (272) [user] mfix_vars1(";;         (@doc some-func", ";;         (@doc some-func")
   Call: (272) [apply] apply:maplist_([1696, 0], _169550, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1696, 0], [_207546|_207548], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1696, _207546)
^  Unify: (273) [user] mfix_vars1(1696, _207546)
   Call: (274) [system] var(1696)
^  Redo: (273) [user] mfix_vars1(1696, _207546)
^  Unify: (273) [user] mfix_vars1(1696, '$VAR'(_212192))
   Call: (274) [system] atom(1696)
^  Redo: (273) [user] mfix_vars1(1696, _207546)
^  Unify: (273) [user] mfix_vars1(1696, _207546)
   Call: (274) [system] 1696==true
^  Redo: (273) [user] mfix_vars1(1696, _207546)
^  Unify: (273) [user] mfix_vars1(1696, _207546)
   Call: (274) [system] 1696==false
^  Redo: (273) [user] mfix_vars1(1696, _207546)
^  Unify: (273) [user] mfix_vars1(1696, _207546)
   Call: (274) [system] 1696==[_221472, _221478]
^  Redo: (273) [user] mfix_vars1(1696, _207546)
^  Unify: (273) [user] mfix_vars1(1696, _207546)
   Call: (274) [system] is_list(1696)
^  Redo: (273) [user] mfix_vars1(1696, _207546)
^  Unify: (273) [user] mfix_vars1(1696, _207546)
   Call: (274) [system] string(1696)
^  Redo: (273) [user] mfix_vars1(1696, _207546)
^  Unify: (273) [user] mfix_vars1(1696, _207546)
   Call: (274) [system] compound(1696)
^  Redo: (273) [user] mfix_vars1(1696, _207546)
^  Unify: (273) [user] mfix_vars1(1696, _207546)
^  Call: (274) [user] symbol(1696)
^  Unify: (274) [user] symbol(1696)
   Call: (275) [system] atom(1696)
   Fail: (275) [system] atom(1696)
^  Fail: (274) [user] symbol(1696)
^  Redo: (273) [user] mfix_vars1(1696, _207546)
   Call: (274) [system] 1696=_207546
   Exit: (274) [system] 1696=1696
^  Exit: (273) [user] mfix_vars1(1696, 1696)
   Call: (273) [apply] apply:maplist_([0], _207548, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_241872|_241874], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _241872)
^  Unify: (274) [user] mfix_vars1(0, _241872)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _241872)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_246518))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _241872)
^  Unify: (274) [user] mfix_vars1(0, _241872)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _241872)
^  Unify: (274) [user] mfix_vars1(0, _241872)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _241872)
^  Unify: (274) [user] mfix_vars1(0, _241872)
   Call: (275) [system] 0==[_255798, _255804]
^  Redo: (274) [user] mfix_vars1(0, _241872)
^  Unify: (274) [user] mfix_vars1(0, _241872)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _241872)
^  Unify: (274) [user] mfix_vars1(0, _241872)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _241872)
^  Unify: (274) [user] mfix_vars1(0, _241872)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _241872)
^  Unify: (274) [user] mfix_vars1(0, _241872)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _241872)
   Call: (275) [system] 0=_241872
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _241874, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1696, 0], [1696, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         (@doc some-func", 1696, 0], [";;         (@doc some-func", 1696, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (@doc some-func", 1696, 0], [";;         (@doc some-func", 1696, 0])
   Call: (270) [system] compound_name_arguments(_136046, '$COMMENT', [";;         (@doc some-func", 1696, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT', [";;         (@doc some-func", 1696, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0)))
   Call: (267) [system] '$COMMENT'(";;         (@doc some-func", 1696, 0)\=@='$COMMENT'(";;         (@doc some-func", 1696, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1696, 0), _130460)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1696, 0), _292046))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1696, 0), _292046))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1696, 0), _292046))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1696, 0), _292046))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1696, 0), _292046)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1696, 0), _292046)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1696, 0), _297632))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1696, 0), _297632))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1696, 0), _297632)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (@doc some-func", 1696, 0), _297632)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         (@doc some-func", 1696, 0), _297632)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0)))
   Call: (267) [system] '$COMMENT'(";;         (@doc some-func", 1696, 0)\=@='$COMMENT'(";;         (@doc some-func", 1696, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1696, 0), _292046)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1696, 0), _124848))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1696, 0), _124848))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1696, 0), _124848))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1696, 0), _124848))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1696, 0), _124848)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1696, 0), _124848)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1696, 0), _319952))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1696, 0), _319952))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1696, 0), _319952)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (@doc some-func", 1696, 0), _319952)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         (@doc some-func", 1696, 0), _319952)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0)))
   Call: (267) [system] '$COMMENT'(";;         (@doc some-func", 1696, 0)\=@='$COMMENT'(";;         (@doc some-func", 1696, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1696, 0), _124848)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0)))
   Call: (261) [system] '$COMMENT'(";;         (@doc some-func", 1696, 0)\=@='$COMMENT'(";;         (@doc some-func", 1696, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc some-func", 1696, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-func", 1696, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-func", 1696, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-func", 1696, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-func", 1696, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-func", 1696, 0), _348730, [], _348732)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-func", 1696, 0), _348730, [], _348732)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-func", 1696, 0), _348730, [], _348732)
   Call: (258) [system] atom('$COMMENT'(";;         (@doc some-func", 1696, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-func", 1696, 0), _348730, [], _348732)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-func", 1696, 0), _348730, [], _348732)
   Call: (258) [system] compound('$COMMENT'(";;         (@doc some-func", 1696, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         (@doc some-func", 1696, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-func", 1696, 0), _358046, _358048)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT', [";;         (@doc some-func", 1696, 0])
^  Call: (258) [user] subst_vars([";;         (@doc some-func", 1696, 0], _359932, [], _348732)
^  Unify: (258) [user] subst_vars([";;         (@doc some-func", 1696, 0], [";;         (@doc some-func", 1696, 0], [], [])
   Call: (259) [system] var([";;         (@doc some-func", 1696, 0])
^  Redo: (258) [user] subst_vars([";;         (@doc some-func", 1696, 0], _359932, [], _348732)
^  Unify: (258) [user] subst_vars([";;         (@doc some-func", 1696, 0], [_363668|_363670], [], _348732)
^  Call: (259) [user] subst_vars(";;         (@doc some-func", _363668, [], _364608)
^  Unify: (259) [user] subst_vars(";;         (@doc some-func", ";;         (@doc some-func", [], [])
   Call: (260) [system] var(";;         (@doc some-func")
^  Redo: (259) [user] subst_vars(";;         (@doc some-func", _363668, [], _364608)
^  Unify: (259) [user] subst_vars(";;         (@doc some-func", _363668, [], _364608)
   Call: (260) [system] atom(";;         (@doc some-func")
^  Redo: (259) [user] subst_vars(";;         (@doc some-func", _363668, [], _364608)
^  Unify: (259) [user] subst_vars(";;         (@doc some-func", _363668, [], _364608)
   Call: (260) [system] compound(";;         (@doc some-func")
^  Redo: (259) [user] subst_vars(";;         (@doc some-func", _363668, [], _364608)
^  Unify: (259) [user] subst_vars(";;         (@doc some-func", ";;         (@doc some-func", [], [])
^  Exit: (259) [user] subst_vars(";;         (@doc some-func", ";;         (@doc some-func", [], [])
^  Call: (259) [user] subst_vars([1696, 0], _363670, [], _348732)
^  Unify: (259) [user] subst_vars([1696, 0], [1696, 0], [], [])
   Call: (260) [system] var([1696, 0])
^  Redo: (259) [user] subst_vars([1696, 0], _363670, [], _348732)
^  Unify: (259) [user] subst_vars([1696, 0], [_379540|_379542], [], _348732)
^  Call: (260) [user] subst_vars(1696, _379540, [], _380480)
^  Unify: (260) [user] subst_vars(1696, 1696, [], [])
   Call: (261) [system] var(1696)
^  Redo: (260) [user] subst_vars(1696, _379540, [], _380480)
^  Unify: (260) [user] subst_vars(1696, _379540, [], _380480)
   Call: (261) [system] atom(1696)
^  Redo: (260) [user] subst_vars(1696, _379540, [], _380480)
^  Unify: (260) [user] subst_vars(1696, _379540, [], _380480)
   Call: (261) [system] compound(1696)
^  Redo: (260) [user] subst_vars(1696, _379540, [], _380480)
^  Unify: (260) [user] subst_vars(1696, 1696, [], [])
^  Exit: (260) [user] subst_vars(1696, 1696, [], [])
^  Call: (260) [user] subst_vars([0], _379542, [], _348732)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _379542, [], _348732)
^  Unify: (260) [user] subst_vars([0], [_395412|_395414], [], _348732)
^  Call: (261) [user] subst_vars(0, _395412, [], _396352)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _395412, [], _396352)
^  Unify: (261) [user] subst_vars(0, _395412, [], _396352)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _395412, [], _396352)
^  Unify: (261) [user] subst_vars(0, _395412, [], _396352)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _395412, [], _396352)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _395414, [], _348732)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _395414, [], _348732)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1696, 0], [1696, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         (@doc some-func", 1696, 0], [";;         (@doc some-func", 1696, 0], [], [])
   Call: (258) [system] compound_name_arguments(_348730, '$COMMENT', [";;         (@doc some-func", 1696, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT', [";;         (@doc some-func", 1696, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-func", 1696, 0), '$COMMENT'(";;         (@doc some-func", 1696, 0), [], [])
   Call: (257) [system] _418770=metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func", 1696, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func", 1696, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func", 1696, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func", 1696, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func", 1696, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func", 1696, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func", 1696, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func", 1696, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func", 1696, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1697, 0, 60666, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$stream_position'(60666, 1697, 0, 60700)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _471494))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _471494))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _471494)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _471494)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _471494)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _471494)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _477106))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _477106))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _477106))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _477106))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _477106)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _477106)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _482692))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _482692))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _482692)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _482692)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _482692)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _482692)
   Call: (270) [system] var('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _482692)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$VAR'(_490152))
   Call: (270) [system] atom('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _482692)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _482692)
   Call: (270) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _482692)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _482692)
   Call: (270) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _482692)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _482692)
   Call: (270) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0)==[_499432, _499438]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _482692)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _482692)
   Call: (270) [system] is_list('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _482692)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _482692)
   Call: (270) [system] string('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _482692)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _482692)
   Call: (270) [system] compound('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
   Exit: (270) [system] compound('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _509634, _509636)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT', [";;           (@desc \"Test function\")", 1697, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;           (@desc \"Test function\")", 1697, 0], _513376)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@desc \"Test function\")", 1697, 0], _513376)
   Call: (271) [apply] apply:maplist_([";;           (@desc \"Test function\")", 1697, 0], _513376, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;           (@desc \"Test function\")", 1697, 0], [_516194|_516196], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _516194)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _516194)
   Call: (273) [system] var(";;           (@desc \"Test function\")")
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _516194)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", '$VAR'(_520840))
   Call: (273) [system] atom(";;           (@desc \"Test function\")")
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _516194)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _6030)
   Call: (273) [system] ";;           (@desc \"Test function\")"==true
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _6030)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _6030)
   Call: (273) [system] ";;           (@desc \"Test function\")"==false
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _6030)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _6030)
   Call: (273) [system] ";;           (@desc \"Test function\")"==[_12204, _12210]
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _6030)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _6030)
   Call: (273) [system] is_list(";;           (@desc \"Test function\")")
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _6030)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _6030)
   Call: (273) [system] string(";;           (@desc \"Test function\")")
   Exit: (273) [system] string(";;           (@desc \"Test function\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _6030)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _6030)
   Call: (273) [system] compound(";;           (@desc \"Test function\")")
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _6030)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _6030)
^  Call: (273) [user] symbol(";;           (@desc \"Test function\")")
^  Unify: (273) [user] symbol(";;           (@desc \"Test function\")")
   Call: (274) [system] atom(";;           (@desc \"Test function\")")
   Fail: (274) [system] atom(";;           (@desc \"Test function\")")
^  Fail: (273) [user] symbol(";;           (@desc \"Test function\")")
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _6030)
   Call: (273) [system] ";;           (@desc \"Test function\")"=_6030
   Exit: (273) [system] ";;           (@desc \"Test function\")"=";;           (@desc \"Test function\")"
^  Exit: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", ";;           (@desc \"Test function\")")
   Call: (272) [apply] apply:maplist_([1697, 0], _6032, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1697, 0], [_36276|_36278], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1697, _36276)
^  Unify: (273) [user] mfix_vars1(1697, _36276)
   Call: (274) [system] var(1697)
^  Redo: (273) [user] mfix_vars1(1697, _36276)
^  Unify: (273) [user] mfix_vars1(1697, '$VAR'(_40922))
   Call: (274) [system] atom(1697)
^  Redo: (273) [user] mfix_vars1(1697, _36276)
^  Unify: (273) [user] mfix_vars1(1697, _36276)
   Call: (274) [system] 1697==true
^  Redo: (273) [user] mfix_vars1(1697, _36276)
^  Unify: (273) [user] mfix_vars1(1697, _36276)
   Call: (274) [system] 1697==false
^  Redo: (273) [user] mfix_vars1(1697, _36276)
^  Unify: (273) [user] mfix_vars1(1697, _36276)
   Call: (274) [system] 1697==[_50202, _50208]
^  Redo: (273) [user] mfix_vars1(1697, _36276)
^  Unify: (273) [user] mfix_vars1(1697, _36276)
   Call: (274) [system] is_list(1697)
^  Redo: (273) [user] mfix_vars1(1697, _36276)
^  Unify: (273) [user] mfix_vars1(1697, _36276)
   Call: (274) [system] string(1697)
^  Redo: (273) [user] mfix_vars1(1697, _36276)
^  Unify: (273) [user] mfix_vars1(1697, _36276)
   Call: (274) [system] compound(1697)
^  Redo: (273) [user] mfix_vars1(1697, _36276)
^  Unify: (273) [user] mfix_vars1(1697, _36276)
^  Call: (274) [user] symbol(1697)
^  Unify: (274) [user] symbol(1697)
   Call: (275) [system] atom(1697)
   Fail: (275) [system] atom(1697)
^  Fail: (274) [user] symbol(1697)
^  Redo: (273) [user] mfix_vars1(1697, _36276)
   Call: (274) [system] 1697=_36276
   Exit: (274) [system] 1697=1697
^  Exit: (273) [user] mfix_vars1(1697, 1697)
   Call: (273) [apply] apply:maplist_([0], _36278, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_70602|_70604], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _70602)
^  Unify: (274) [user] mfix_vars1(0, _70602)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _70602)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_75248))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _70602)
^  Unify: (274) [user] mfix_vars1(0, _70602)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _70602)
^  Unify: (274) [user] mfix_vars1(0, _70602)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _70602)
^  Unify: (274) [user] mfix_vars1(0, _70602)
   Call: (275) [system] 0==[_84528, _84534]
^  Redo: (274) [user] mfix_vars1(0, _70602)
^  Unify: (274) [user] mfix_vars1(0, _70602)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _70602)
^  Unify: (274) [user] mfix_vars1(0, _70602)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _70602)
^  Unify: (274) [user] mfix_vars1(0, _70602)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _70602)
^  Unify: (274) [user] mfix_vars1(0, _70602)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _70602)
   Call: (275) [system] 0=_70602
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _70604, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1697, 0], [1697, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;           (@desc \"Test function\")", 1697, 0], [";;           (@desc \"Test function\")", 1697, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@desc \"Test function\")", 1697, 0], [";;           (@desc \"Test function\")", 1697, 0])
   Call: (270) [system] compound_name_arguments(_5984, '$COMMENT', [";;           (@desc \"Test function\")", 1697, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT', [";;           (@desc \"Test function\")", 1697, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0)\=@='$COMMENT'(";;           (@desc \"Test function\")", 1697, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _5970)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _120776))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _120776))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _120776))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _120776))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _120776)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _120776)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _126362))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _126362))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _126362)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _126362)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _126362)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0)\=@='$COMMENT'(";;           (@desc \"Test function\")", 1697, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _120776)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _148682))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _148682))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _148682)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _148682)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _148682)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0)\=@='$COMMENT'(";;           (@desc \"Test function\")", 1697, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0)))
   Call: (261) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0)\=@='$COMMENT'(";;           (@desc \"Test function\")", 1697, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _177460, [], _177462)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _177460, [], _177462)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _177460, [], _177462)
   Call: (258) [system] atom('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _177460, [], _177462)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _177460, [], _177462)
   Call: (258) [system] compound('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
   Exit: (258) [system] compound('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), _186776, _186778)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT', [";;           (@desc \"Test function\")", 1697, 0])
^  Call: (258) [user] subst_vars([";;           (@desc \"Test function\")", 1697, 0], _188662, [], _177462)
^  Unify: (258) [user] subst_vars([";;           (@desc \"Test function\")", 1697, 0], [";;           (@desc \"Test function\")", 1697, 0], [], [])
   Call: (259) [system] var([";;           (@desc \"Test function\")", 1697, 0])
^  Redo: (258) [user] subst_vars([";;           (@desc \"Test function\")", 1697, 0], _188662, [], _177462)
^  Unify: (258) [user] subst_vars([";;           (@desc \"Test function\")", 1697, 0], [_192398|_192400], [], _177462)
^  Call: (259) [user] subst_vars(";;           (@desc \"Test function\")", _192398, [], _193338)
^  Unify: (259) [user] subst_vars(";;           (@desc \"Test function\")", ";;           (@desc \"Test function\")", [], [])
   Call: (260) [system] var(";;           (@desc \"Test function\")")
^  Redo: (259) [user] subst_vars(";;           (@desc \"Test function\")", _192398, [], _193338)
^  Unify: (259) [user] subst_vars(";;           (@desc \"Test function\")", _192398, [], _193338)
   Call: (260) [system] atom(";;           (@desc \"Test function\")")
^  Redo: (259) [user] subst_vars(";;           (@desc \"Test function\")", _192398, [], _193338)
^  Unify: (259) [user] subst_vars(";;           (@desc \"Test function\")", _192398, [], _193338)
   Call: (260) [system] compound(";;           (@desc \"Test function\")")
^  Redo: (259) [user] subst_vars(";;           (@desc \"Test function\")", _192398, [], _193338)
^  Unify: (259) [user] subst_vars(";;           (@desc \"Test function\")", ";;           (@desc \"Test function\")", [], [])
^  Exit: (259) [user] subst_vars(";;           (@desc \"Test function\")", ";;           (@desc \"Test function\")", [], [])
^  Call: (259) [user] subst_vars([1697, 0], _192400, [], _177462)
^  Unify: (259) [user] subst_vars([1697, 0], [1697, 0], [], [])
   Call: (260) [system] var([1697, 0])
^  Redo: (259) [user] subst_vars([1697, 0], _192400, [], _177462)
^  Unify: (259) [user] subst_vars([1697, 0], [_208270|_208272], [], _177462)
^  Call: (260) [user] subst_vars(1697, _208270, [], _209210)
^  Unify: (260) [user] subst_vars(1697, 1697, [], [])
   Call: (261) [system] var(1697)
^  Redo: (260) [user] subst_vars(1697, _208270, [], _209210)
^  Unify: (260) [user] subst_vars(1697, _208270, [], _209210)
   Call: (261) [system] atom(1697)
^  Redo: (260) [user] subst_vars(1697, _208270, [], _209210)
^  Unify: (260) [user] subst_vars(1697, _208270, [], _209210)
   Call: (261) [system] compound(1697)
^  Redo: (260) [user] subst_vars(1697, _208270, [], _209210)
^  Unify: (260) [user] subst_vars(1697, 1697, [], [])
^  Exit: (260) [user] subst_vars(1697, 1697, [], [])
^  Call: (260) [user] subst_vars([0], _208272, [], _177462)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _208272, [], _177462)
^  Unify: (260) [user] subst_vars([0], [_224142|_224144], [], _177462)
^  Call: (261) [user] subst_vars(0, _224142, [], _225082)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _224142, [], _225082)
^  Unify: (261) [user] subst_vars(0, _224142, [], _225082)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _224142, [], _225082)
^  Unify: (261) [user] subst_vars(0, _224142, [], _225082)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _224142, [], _225082)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _224144, [], _177462)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _224144, [], _177462)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1697, 0], [1697, 0], [], [])
^  Exit: (258) [user] subst_vars([";;           (@desc \"Test function\")", 1697, 0], [";;           (@desc \"Test function\")", 1697, 0], [], [])
   Call: (258) [system] compound_name_arguments(_177460, '$COMMENT', [";;           (@desc \"Test function\")", 1697, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT', [";;           (@desc \"Test function\")", 1697, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), [], [])
   Call: (257) [system] _247500=metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1697, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1698, 0, 60703, '$COMMENT'(";;           (@params (", 1698, 0), '$stream_position'(60703, 1698, 0, 60737)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@params (", 1698, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@params (", 1698, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;           (@params (", 1698, 0), _300222))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@params (", 1698, 0), _300222))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;           (@params (", 1698, 0), _300222)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@params (", 1698, 0), _300222)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;           (@params (", 1698, 0), _300222)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;           (@params (", 1698, 0), _300222)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1698, 0), _305834))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1698, 0), _305834))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1698, 0), _305834))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1698, 0), _305834))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1698, 0), _305834)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1698, 0), _305834)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;           (@params (", 1698, 0), _311420))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@params (", 1698, 0), _311420))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;           (@params (", 1698, 0), _311420)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@params (", 1698, 0), _311420)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1698, 0), _311420)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1698, 0), _311420)
   Call: (270) [system] var('$COMMENT'(";;           (@params (", 1698, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1698, 0), _311420)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1698, 0), '$VAR'(_318880))
   Call: (270) [system] atom('$COMMENT'(";;           (@params (", 1698, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1698, 0), _311420)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1698, 0), _311420)
   Call: (270) [system] '$COMMENT'(";;           (@params (", 1698, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1698, 0), _311420)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1698, 0), _311420)
   Call: (270) [system] '$COMMENT'(";;           (@params (", 1698, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1698, 0), _311420)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1698, 0), _311420)
   Call: (270) [system] '$COMMENT'(";;           (@params (", 1698, 0)==[_328160, _328166]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1698, 0), _311420)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1698, 0), _311420)
   Call: (270) [system] is_list('$COMMENT'(";;           (@params (", 1698, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1698, 0), _311420)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1698, 0), _311420)
   Call: (270) [system] string('$COMMENT'(";;           (@params (", 1698, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1698, 0), _311420)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1698, 0), _311420)
   Call: (270) [system] compound('$COMMENT'(";;           (@params (", 1698, 0))
   Exit: (270) [system] compound('$COMMENT'(";;           (@params (", 1698, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1698, 0), _338362, _338364)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT', [";;           (@params (", 1698, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;           (@params (", 1698, 0], _342104)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@params (", 1698, 0], _342104)
   Call: (271) [apply] apply:maplist_([";;           (@params (", 1698, 0], _342104, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;           (@params (", 1698, 0], [_344922|_344924], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;           (@params (", _344922)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _344922)
   Call: (273) [system] var(";;           (@params (")
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _344922)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", '$VAR'(_349568))
   Call: (273) [system] atom(";;           (@params (")
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _344922)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _344922)
   Call: (273) [system] ";;           (@params ("==true
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _344922)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _344922)
   Call: (273) [system] ";;           (@params ("==false
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _344922)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _344922)
   Call: (273) [system] ";;           (@params ("==[_358848, _358854]
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _344922)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _344922)
   Call: (273) [system] is_list(";;           (@params (")
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _344922)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _344922)
   Call: (273) [system] string(";;           (@params (")
   Exit: (273) [system] string(";;           (@params (")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _344922)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _344922)
   Call: (273) [system] compound(";;           (@params (")
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _344922)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _344922)
^  Call: (273) [user] symbol(";;           (@params (")
^  Unify: (273) [user] symbol(";;           (@params (")
   Call: (274) [system] atom(";;           (@params (")
   Fail: (274) [system] atom(";;           (@params (")
^  Fail: (273) [user] symbol(";;           (@params (")
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _344922)
   Call: (273) [system] ";;           (@params ("=_344922
   Exit: (273) [system] ";;           (@params ("=";;           (@params ("
^  Exit: (272) [user] mfix_vars1(";;           (@params (", ";;           (@params (")
   Call: (272) [apply] apply:maplist_([1698, 0], _344924, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1698, 0], [_382920|_382922], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1698, _382920)
^  Unify: (273) [user] mfix_vars1(1698, _382920)
   Call: (274) [system] var(1698)
^  Redo: (273) [user] mfix_vars1(1698, _382920)
^  Unify: (273) [user] mfix_vars1(1698, '$VAR'(_387566))
   Call: (274) [system] atom(1698)
^  Redo: (273) [user] mfix_vars1(1698, _382920)
^  Unify: (273) [user] mfix_vars1(1698, _382920)
   Call: (274) [system] 1698==true
^  Redo: (273) [user] mfix_vars1(1698, _382920)
^  Unify: (273) [user] mfix_vars1(1698, _382920)
   Call: (274) [system] 1698==false
^  Redo: (273) [user] mfix_vars1(1698, _382920)
^  Unify: (273) [user] mfix_vars1(1698, _382920)
   Call: (274) [system] 1698==[_396846, _396852]
^  Redo: (273) [user] mfix_vars1(1698, _382920)
^  Unify: (273) [user] mfix_vars1(1698, _382920)
   Call: (274) [system] is_list(1698)
^  Redo: (273) [user] mfix_vars1(1698, _382920)
^  Unify: (273) [user] mfix_vars1(1698, _382920)
   Call: (274) [system] string(1698)
^  Redo: (273) [user] mfix_vars1(1698, _382920)
^  Unify: (273) [user] mfix_vars1(1698, _382920)
   Call: (274) [system] compound(1698)
^  Redo: (273) [user] mfix_vars1(1698, _382920)
^  Unify: (273) [user] mfix_vars1(1698, _382920)
^  Call: (274) [user] symbol(1698)
^  Unify: (274) [user] symbol(1698)
   Call: (275) [system] atom(1698)
   Fail: (275) [system] atom(1698)
^  Fail: (274) [user] symbol(1698)
^  Redo: (273) [user] mfix_vars1(1698, _382920)
   Call: (274) [system] 1698=_382920
   Exit: (274) [system] 1698=1698
^  Exit: (273) [user] mfix_vars1(1698, 1698)
   Call: (273) [apply] apply:maplist_([0], _382922, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_417246|_417248], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _417246)
^  Unify: (274) [user] mfix_vars1(0, _417246)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _417246)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_421892))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _417246)
^  Unify: (274) [user] mfix_vars1(0, _417246)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _417246)
^  Unify: (274) [user] mfix_vars1(0, _417246)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _417246)
^  Unify: (274) [user] mfix_vars1(0, _417246)
   Call: (275) [system] 0==[_431172, _431178]
^  Redo: (274) [user] mfix_vars1(0, _417246)
^  Unify: (274) [user] mfix_vars1(0, _417246)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _417246)
^  Unify: (274) [user] mfix_vars1(0, _417246)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _417246)
^  Unify: (274) [user] mfix_vars1(0, _417246)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _417246)
^  Unify: (274) [user] mfix_vars1(0, _417246)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _417246)
   Call: (275) [system] 0=_417246
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _417248, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1698, 0], [1698, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;           (@params (", 1698, 0], [";;           (@params (", 1698, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@params (", 1698, 0], [";;           (@params (", 1698, 0])
   Call: (270) [system] compound_name_arguments(_311420, '$COMMENT', [";;           (@params (", 1698, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT', [";;           (@params (", 1698, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@params (", 1698, 0)\=@='$COMMENT'(";;           (@params (", 1698, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1698, 0), _305834)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;           (@params (", 1698, 0), _467420))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@params (", 1698, 0), _467420))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;           (@params (", 1698, 0), _467420))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@params (", 1698, 0), _467420))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@params (", 1698, 0), _467420)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@params (", 1698, 0), _467420)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;           (@params (", 1698, 0), _473006))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@params (", 1698, 0), _473006))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;           (@params (", 1698, 0), _473006)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@params (", 1698, 0), _473006)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;           (@params (", 1698, 0), _473006)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@params (", 1698, 0)\=@='$COMMENT'(";;           (@params (", 1698, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@params (", 1698, 0), _467420)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;           (@params (", 1698, 0), _300222))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@params (", 1698, 0), _300222))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;           (@params (", 1698, 0), _300222))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@params (", 1698, 0), _300222))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@params (", 1698, 0), _300222)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@params (", 1698, 0), _300222)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;           (@params (", 1698, 0), _495326))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@params (", 1698, 0), _495326))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;           (@params (", 1698, 0), _495326)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@params (", 1698, 0), _495326)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;           (@params (", 1698, 0), _495326)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@params (", 1698, 0)\=@='$COMMENT'(";;           (@params (", 1698, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@params (", 1698, 0), _300222)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0)))
   Call: (261) [system] '$COMMENT'(";;           (@params (", 1698, 0)\=@='$COMMENT'(";;           (@params (", 1698, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@params (", 1698, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1698, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1698, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1698, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1698, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1698, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1698, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1698, 0), _5944, [], _5946)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;           (@params (", 1698, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1698, 0), _5944, [], _5946)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1698, 0), _5944, [], _5946)
   Call: (258) [system] atom('$COMMENT'(";;           (@params (", 1698, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1698, 0), _5944, [], _5946)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1698, 0), _5944, [], _5946)
   Call: (258) [system] compound('$COMMENT'(";;           (@params (", 1698, 0))
   Exit: (258) [system] compound('$COMMENT'(";;           (@params (", 1698, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1698, 0), _15216, _15218)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT', [";;           (@params (", 1698, 0])
^  Call: (258) [user] subst_vars([";;           (@params (", 1698, 0], _17102, [], _5946)
^  Unify: (258) [user] subst_vars([";;           (@params (", 1698, 0], [";;           (@params (", 1698, 0], [], [])
   Call: (259) [system] var([";;           (@params (", 1698, 0])
^  Redo: (258) [user] subst_vars([";;           (@params (", 1698, 0], _17102, [], _5946)
^  Unify: (258) [user] subst_vars([";;           (@params (", 1698, 0], [_20838|_20840], [], _5946)
^  Call: (259) [user] subst_vars(";;           (@params (", _20838, [], _21778)
^  Unify: (259) [user] subst_vars(";;           (@params (", ";;           (@params (", [], [])
   Call: (260) [system] var(";;           (@params (")
^  Redo: (259) [user] subst_vars(";;           (@params (", _20838, [], _21778)
^  Unify: (259) [user] subst_vars(";;           (@params (", _20838, [], _21778)
   Call: (260) [system] atom(";;           (@params (")
^  Redo: (259) [user] subst_vars(";;           (@params (", _20838, [], _21778)
^  Unify: (259) [user] subst_vars(";;           (@params (", _20838, [], _21778)
   Call: (260) [system] compound(";;           (@params (")
^  Redo: (259) [user] subst_vars(";;           (@params (", _20838, [], _21778)
^  Unify: (259) [user] subst_vars(";;           (@params (", ";;           (@params (", [], [])
^  Exit: (259) [user] subst_vars(";;           (@params (", ";;           (@params (", [], [])
^  Call: (259) [user] subst_vars([1698, 0], _20840, [], _5946)
^  Unify: (259) [user] subst_vars([1698, 0], [1698, 0], [], [])
   Call: (260) [system] var([1698, 0])
^  Redo: (259) [user] subst_vars([1698, 0], _20840, [], _5946)
^  Unify: (259) [user] subst_vars([1698, 0], [_36710|_36712], [], _5946)
^  Call: (260) [user] subst_vars(1698, _36710, [], _37650)
^  Unify: (260) [user] subst_vars(1698, 1698, [], [])
   Call: (261) [system] var(1698)
^  Redo: (260) [user] subst_vars(1698, _36710, [], _37650)
^  Unify: (260) [user] subst_vars(1698, _36710, [], _37650)
   Call: (261) [system] atom(1698)
^  Redo: (260) [user] subst_vars(1698, _36710, [], _37650)
^  Unify: (260) [user] subst_vars(1698, _36710, [], _37650)
   Call: (261) [system] compound(1698)
^  Redo: (260) [user] subst_vars(1698, _36710, [], _37650)
^  Unify: (260) [user] subst_vars(1698, 1698, [], [])
^  Exit: (260) [user] subst_vars(1698, 1698, [], [])
^  Call: (260) [user] subst_vars([0], _36712, [], _5946)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _36712, [], _5946)
^  Unify: (260) [user] subst_vars([0], [_52582|_52584], [], _5946)
^  Call: (261) [user] subst_vars(0, _52582, [], _53522)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _52582, [], _53522)
^  Unify: (261) [user] subst_vars(0, _52582, [], _53522)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _52582, [], _53522)
^  Unify: (261) [user] subst_vars(0, _52582, [], _53522)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _52582, [], _53522)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _52584, [], _5946)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _52584, [], _5946)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1698, 0], [1698, 0], [], [])
^  Exit: (258) [user] subst_vars([";;           (@params (", 1698, 0], [";;           (@params (", 1698, 0], [], [])
   Call: (258) [system] compound_name_arguments(_5944, '$COMMENT', [";;           (@params (", 1698, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT', [";;           (@params (", 1698, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1698, 0), '$COMMENT'(";;           (@params (", 1698, 0), [], [])
   Call: (257) [system] _75940=metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1698, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1698, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1698, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1698, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1698, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1698, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1698, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1698, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1698, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1699, 0, 60727, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$stream_position'(60727, 1699, 0, 60761)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _128666))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _128666))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _128666)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _128666)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _128666)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _128666)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _134278))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _134278))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _134278))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _134278))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _134278)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _134278)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _139864))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _139864))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _139864)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _139864)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _139864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _139864)
   Call: (270) [system] var('$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _139864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$VAR'(_147324))
   Call: (270) [system] atom('$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _139864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _139864)
   Call: (270) [system] '$COMMENT'(";;             (@param \"First argument\")", 1699, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _139864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _139864)
   Call: (270) [system] '$COMMENT'(";;             (@param \"First argument\")", 1699, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _139864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _139864)
   Call: (270) [system] '$COMMENT'(";;             (@param \"First argument\")", 1699, 0)==[_156604, _156610]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _139864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _139864)
   Call: (270) [system] is_list('$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _139864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _139864)
   Call: (270) [system] string('$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _139864)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _139864)
   Call: (270) [system] compound('$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _166806, _166808)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT', [";;             (@param \"First argument\")", 1699, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (@param \"First argument\")", 1699, 0], _170548)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (@param \"First argument\")", 1699, 0], _170548)
   Call: (271) [apply] apply:maplist_([";;             (@param \"First argument\")", 1699, 0], _170548, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (@param \"First argument\")", 1699, 0], [_173366|_173368], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _173366)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _173366)
   Call: (273) [system] var(";;             (@param \"First argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _173366)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", '$VAR'(_178012))
   Call: (273) [system] atom(";;             (@param \"First argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _173366)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _173366)
   Call: (273) [system] ";;             (@param \"First argument\")"==true
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _173366)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _173366)
   Call: (273) [system] ";;             (@param \"First argument\")"==false
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _173366)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _173366)
   Call: (273) [system] ";;             (@param \"First argument\")"==[_187292, _187298]
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _173366)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _173366)
   Call: (273) [system] is_list(";;             (@param \"First argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _173366)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _173366)
   Call: (273) [system] string(";;             (@param \"First argument\")")
   Exit: (273) [system] string(";;             (@param \"First argument\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _173366)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _173366)
   Call: (273) [system] compound(";;             (@param \"First argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _173366)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _173366)
^  Call: (273) [user] symbol(";;             (@param \"First argument\")")
^  Unify: (273) [user] symbol(";;             (@param \"First argument\")")
   Call: (274) [system] atom(";;             (@param \"First argument\")")
   Fail: (274) [system] atom(";;             (@param \"First argument\")")
^  Fail: (273) [user] symbol(";;             (@param \"First argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _173366)
   Call: (273) [system] ";;             (@param \"First argument\")"=_173366
   Exit: (273) [system] ";;             (@param \"First argument\")"=";;             (@param \"First argument\")"
^  Exit: (272) [user] mfix_vars1(";;             (@param \"First argument\")", ";;             (@param \"First argument\")")
   Call: (272) [apply] apply:maplist_([1699, 0], _173368, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1699, 0], [_211364|_211366], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1699, _211364)
^  Unify: (273) [user] mfix_vars1(1699, _211364)
   Call: (274) [system] var(1699)
^  Redo: (273) [user] mfix_vars1(1699, _211364)
^  Unify: (273) [user] mfix_vars1(1699, '$VAR'(_216010))
   Call: (274) [system] atom(1699)
^  Redo: (273) [user] mfix_vars1(1699, _211364)
^  Unify: (273) [user] mfix_vars1(1699, _211364)
   Call: (274) [system] 1699==true
^  Redo: (273) [user] mfix_vars1(1699, _211364)
^  Unify: (273) [user] mfix_vars1(1699, _211364)
   Call: (274) [system] 1699==false
^  Redo: (273) [user] mfix_vars1(1699, _211364)
^  Unify: (273) [user] mfix_vars1(1699, _211364)
   Call: (274) [system] 1699==[_225290, _225296]
^  Redo: (273) [user] mfix_vars1(1699, _211364)
^  Unify: (273) [user] mfix_vars1(1699, _211364)
   Call: (274) [system] is_list(1699)
^  Redo: (273) [user] mfix_vars1(1699, _211364)
^  Unify: (273) [user] mfix_vars1(1699, _211364)
   Call: (274) [system] string(1699)
^  Redo: (273) [user] mfix_vars1(1699, _211364)
^  Unify: (273) [user] mfix_vars1(1699, _211364)
   Call: (274) [system] compound(1699)
^  Redo: (273) [user] mfix_vars1(1699, _211364)
^  Unify: (273) [user] mfix_vars1(1699, _211364)
^  Call: (274) [user] symbol(1699)
^  Unify: (274) [user] symbol(1699)
   Call: (275) [system] atom(1699)
   Fail: (275) [system] atom(1699)
^  Fail: (274) [user] symbol(1699)
^  Redo: (273) [user] mfix_vars1(1699, _211364)
   Call: (274) [system] 1699=_211364
   Exit: (274) [system] 1699=1699
^  Exit: (273) [user] mfix_vars1(1699, 1699)
   Call: (273) [apply] apply:maplist_([0], _211366, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_245690|_245692], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _245690)
^  Unify: (274) [user] mfix_vars1(0, _245690)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _245690)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_250336))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _245690)
^  Unify: (274) [user] mfix_vars1(0, _245690)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _245690)
^  Unify: (274) [user] mfix_vars1(0, _245690)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _245690)
^  Unify: (274) [user] mfix_vars1(0, _245690)
   Call: (275) [system] 0==[_259616, _259622]
^  Redo: (274) [user] mfix_vars1(0, _245690)
^  Unify: (274) [user] mfix_vars1(0, _245690)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _245690)
^  Unify: (274) [user] mfix_vars1(0, _245690)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _245690)
^  Unify: (274) [user] mfix_vars1(0, _245690)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _245690)
^  Unify: (274) [user] mfix_vars1(0, _245690)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _245690)
   Call: (275) [system] 0=_245690
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _245692, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1699, 0], [1699, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (@param \"First argument\")", 1699, 0], [";;             (@param \"First argument\")", 1699, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (@param \"First argument\")", 1699, 0], [";;             (@param \"First argument\")", 1699, 0])
   Call: (270) [system] compound_name_arguments(_139864, '$COMMENT', [";;             (@param \"First argument\")", 1699, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT', [";;             (@param \"First argument\")", 1699, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"First argument\")", 1699, 0)\=@='$COMMENT'(";;             (@param \"First argument\")", 1699, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _134278)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _295864))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _295864))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _295864))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _295864))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _295864)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _295864)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _301450))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _301450))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _301450)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _301450)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _301450)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"First argument\")", 1699, 0)\=@='$COMMENT'(";;             (@param \"First argument\")", 1699, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _295864)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _128666))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _128666))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _128666))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _128666))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _128666)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _128666)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _323770))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _323770))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _323770)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _323770)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _323770)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"First argument\")", 1699, 0)\=@='$COMMENT'(";;             (@param \"First argument\")", 1699, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _128666)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0)))
   Call: (261) [system] '$COMMENT'(";;             (@param \"First argument\")", 1699, 0)\=@='$COMMENT'(";;             (@param \"First argument\")", 1699, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _352548, [], _352550)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _352548, [], _352550)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _352548, [], _352550)
   Call: (258) [system] atom('$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _352548, [], _352550)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _352548, [], _352550)
   Call: (258) [system] compound('$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (@param \"First argument\")", 1699, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), _361864, _361866)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT', [";;             (@param \"First argument\")", 1699, 0])
^  Call: (258) [user] subst_vars([";;             (@param \"First argument\")", 1699, 0], _363750, [], _352550)
^  Unify: (258) [user] subst_vars([";;             (@param \"First argument\")", 1699, 0], [";;             (@param \"First argument\")", 1699, 0], [], [])
   Call: (259) [system] var([";;             (@param \"First argument\")", 1699, 0])
^  Redo: (258) [user] subst_vars([";;             (@param \"First argument\")", 1699, 0], _363750, [], _352550)
^  Unify: (258) [user] subst_vars([";;             (@param \"First argument\")", 1699, 0], [_367486|_367488], [], _352550)
^  Call: (259) [user] subst_vars(";;             (@param \"First argument\")", _367486, [], _368426)
^  Unify: (259) [user] subst_vars(";;             (@param \"First argument\")", ";;             (@param \"First argument\")", [], [])
   Call: (260) [system] var(";;             (@param \"First argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"First argument\")", _367486, [], _368426)
^  Unify: (259) [user] subst_vars(";;             (@param \"First argument\")", _367486, [], _368426)
   Call: (260) [system] atom(";;             (@param \"First argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"First argument\")", _367486, [], _368426)
^  Unify: (259) [user] subst_vars(";;             (@param \"First argument\")", _367486, [], _368426)
   Call: (260) [system] compound(";;             (@param \"First argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"First argument\")", _367486, [], _368426)
^  Unify: (259) [user] subst_vars(";;             (@param \"First argument\")", ";;             (@param \"First argument\")", [], [])
^  Exit: (259) [user] subst_vars(";;             (@param \"First argument\")", ";;             (@param \"First argument\")", [], [])
^  Call: (259) [user] subst_vars([1699, 0], _367488, [], _352550)
^  Unify: (259) [user] subst_vars([1699, 0], [1699, 0], [], [])
   Call: (260) [system] var([1699, 0])
^  Redo: (259) [user] subst_vars([1699, 0], _367488, [], _352550)
^  Unify: (259) [user] subst_vars([1699, 0], [_383358|_383360], [], _352550)
^  Call: (260) [user] subst_vars(1699, _383358, [], _384298)
^  Unify: (260) [user] subst_vars(1699, 1699, [], [])
   Call: (261) [system] var(1699)
^  Redo: (260) [user] subst_vars(1699, _383358, [], _384298)
^  Unify: (260) [user] subst_vars(1699, _383358, [], _384298)
   Call: (261) [system] atom(1699)
^  Redo: (260) [user] subst_vars(1699, _383358, [], _384298)
^  Unify: (260) [user] subst_vars(1699, _383358, [], _384298)
   Call: (261) [system] compound(1699)
^  Redo: (260) [user] subst_vars(1699, _383358, [], _384298)
^  Unify: (260) [user] subst_vars(1699, 1699, [], [])
^  Exit: (260) [user] subst_vars(1699, 1699, [], [])
^  Call: (260) [user] subst_vars([0], _383360, [], _352550)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _383360, [], _352550)
^  Unify: (260) [user] subst_vars([0], [_399230|_399232], [], _352550)
^  Call: (261) [user] subst_vars(0, _399230, [], _400170)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _399230, [], _400170)
^  Unify: (261) [user] subst_vars(0, _399230, [], _400170)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _399230, [], _400170)
^  Unify: (261) [user] subst_vars(0, _399230, [], _400170)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _399230, [], _400170)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _399232, [], _352550)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _399232, [], _352550)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1699, 0], [1699, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (@param \"First argument\")", 1699, 0], [";;             (@param \"First argument\")", 1699, 0], [], [])
   Call: (258) [system] compound_name_arguments(_352548, '$COMMENT', [";;             (@param \"First argument\")", 1699, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT', [";;             (@param \"First argument\")", 1699, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1699, 0), '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), [], [])
   Call: (257) [system] _422588=metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1699, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1700, 0, 60768, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$stream_position'(60768, 1700, 0, 60802)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _475314))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _475314))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _475314)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _475314)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _475314)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _475314)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _480926))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _480926))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _480926))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _480926))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _480926)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _480926)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _486512))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _486512))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _486512)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _486512)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _486512)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _486512)
   Call: (270) [system] var('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _486512)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$VAR'(_493972))
   Call: (270) [system] atom('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _486512)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _486512)
   Call: (270) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _486512)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _486512)
   Call: (270) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _486512)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _486512)
   Call: (270) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0)==[_503252, _503258]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _486512)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _486512)
   Call: (270) [system] is_list('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _486512)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _486512)
   Call: (270) [system] string('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _486512)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _486512)
   Call: (270) [system] compound('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _513454, _513456)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT', [";;             (@param \"Second argument\")", 1700, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (@param \"Second argument\")", 1700, 0], _517196)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (@param \"Second argument\")", 1700, 0], _517196)
   Call: (271) [apply] apply:maplist_([";;             (@param \"Second argument\")", 1700, 0], _517196, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (@param \"Second argument\")", 1700, 0], [_520014|_520016], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _520014)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _520014)
   Call: (273) [system] var(";;             (@param \"Second argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _6032)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", '$VAR'(_6748))
   Call: (273) [system] atom(";;             (@param \"Second argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _6032)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _6032)
   Call: (273) [system] ";;             (@param \"Second argument\")"==true
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _6032)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _6032)
   Call: (273) [system] ";;             (@param \"Second argument\")"==false
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _6032)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _6032)
   Call: (273) [system] ";;             (@param \"Second argument\")"==[_16028, _16034]
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _6032)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _6032)
   Call: (273) [system] is_list(";;             (@param \"Second argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _6032)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _6032)
   Call: (273) [system] string(";;             (@param \"Second argument\")")
   Exit: (273) [system] string(";;             (@param \"Second argument\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _6032)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _6032)
   Call: (273) [system] compound(";;             (@param \"Second argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _6032)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _6032)
^  Call: (273) [user] symbol(";;             (@param \"Second argument\")")
^  Unify: (273) [user] symbol(";;             (@param \"Second argument\")")
   Call: (274) [system] atom(";;             (@param \"Second argument\")")
   Fail: (274) [system] atom(";;             (@param \"Second argument\")")
^  Fail: (273) [user] symbol(";;             (@param \"Second argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _6032)
   Call: (273) [system] ";;             (@param \"Second argument\")"=_6032
   Exit: (273) [system] ";;             (@param \"Second argument\")"=";;             (@param \"Second argument\")"
^  Exit: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", ";;             (@param \"Second argument\")")
   Call: (272) [apply] apply:maplist_([1700, 0], _6034, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1700, 0], [_40100|_40102], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1700, _40100)
^  Unify: (273) [user] mfix_vars1(1700, _40100)
   Call: (274) [system] var(1700)
^  Redo: (273) [user] mfix_vars1(1700, _40100)
^  Unify: (273) [user] mfix_vars1(1700, '$VAR'(_44746))
   Call: (274) [system] atom(1700)
^  Redo: (273) [user] mfix_vars1(1700, _40100)
^  Unify: (273) [user] mfix_vars1(1700, _40100)
   Call: (274) [system] 1700==true
^  Redo: (273) [user] mfix_vars1(1700, _40100)
^  Unify: (273) [user] mfix_vars1(1700, _40100)
   Call: (274) [system] 1700==false
^  Redo: (273) [user] mfix_vars1(1700, _40100)
^  Unify: (273) [user] mfix_vars1(1700, _40100)
   Call: (274) [system] 1700==[_54026, _54032]
^  Redo: (273) [user] mfix_vars1(1700, _40100)
^  Unify: (273) [user] mfix_vars1(1700, _40100)
   Call: (274) [system] is_list(1700)
^  Redo: (273) [user] mfix_vars1(1700, _40100)
^  Unify: (273) [user] mfix_vars1(1700, _40100)
   Call: (274) [system] string(1700)
^  Redo: (273) [user] mfix_vars1(1700, _40100)
^  Unify: (273) [user] mfix_vars1(1700, _40100)
   Call: (274) [system] compound(1700)
^  Redo: (273) [user] mfix_vars1(1700, _40100)
^  Unify: (273) [user] mfix_vars1(1700, _40100)
^  Call: (274) [user] symbol(1700)
^  Unify: (274) [user] symbol(1700)
   Call: (275) [system] atom(1700)
   Fail: (275) [system] atom(1700)
^  Fail: (274) [user] symbol(1700)
^  Redo: (273) [user] mfix_vars1(1700, _40100)
   Call: (274) [system] 1700=_40100
   Exit: (274) [system] 1700=1700
^  Exit: (273) [user] mfix_vars1(1700, 1700)
   Call: (273) [apply] apply:maplist_([0], _40102, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_74426|_74428], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _74426)
^  Unify: (274) [user] mfix_vars1(0, _74426)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _74426)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_79072))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _74426)
^  Unify: (274) [user] mfix_vars1(0, _74426)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _74426)
^  Unify: (274) [user] mfix_vars1(0, _74426)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _74426)
^  Unify: (274) [user] mfix_vars1(0, _74426)
   Call: (275) [system] 0==[_88352, _88358]
^  Redo: (274) [user] mfix_vars1(0, _74426)
^  Unify: (274) [user] mfix_vars1(0, _74426)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _74426)
^  Unify: (274) [user] mfix_vars1(0, _74426)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _74426)
^  Unify: (274) [user] mfix_vars1(0, _74426)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _74426)
^  Unify: (274) [user] mfix_vars1(0, _74426)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _74426)
   Call: (275) [system] 0=_74426
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _74428, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1700, 0], [1700, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (@param \"Second argument\")", 1700, 0], [";;             (@param \"Second argument\")", 1700, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (@param \"Second argument\")", 1700, 0], [";;             (@param \"Second argument\")", 1700, 0])
   Call: (270) [system] compound_name_arguments(_5986, '$COMMENT', [";;             (@param \"Second argument\")", 1700, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT', [";;             (@param \"Second argument\")", 1700, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0)\=@='$COMMENT'(";;             (@param \"Second argument\")", 1700, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _5972)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _124600))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _124600))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _124600))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _124600))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _124600)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _124600)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _130186))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _130186))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _130186)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _130186)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _130186)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0)\=@='$COMMENT'(";;             (@param \"Second argument\")", 1700, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _124600)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _5952))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _5952))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _5952))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _5952))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _5952)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _152506))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _152506))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _152506)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _152506)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _152506)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0)\=@='$COMMENT'(";;             (@param \"Second argument\")", 1700, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0)))
   Call: (261) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0)\=@='$COMMENT'(";;             (@param \"Second argument\")", 1700, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _181284, [], _181286)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _181284, [], _181286)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _181284, [], _181286)
   Call: (258) [system] atom('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _181284, [], _181286)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _181284, [], _181286)
   Call: (258) [system] compound('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), _190600, _190602)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT', [";;             (@param \"Second argument\")", 1700, 0])
^  Call: (258) [user] subst_vars([";;             (@param \"Second argument\")", 1700, 0], _192486, [], _181286)
^  Unify: (258) [user] subst_vars([";;             (@param \"Second argument\")", 1700, 0], [";;             (@param \"Second argument\")", 1700, 0], [], [])
   Call: (259) [system] var([";;             (@param \"Second argument\")", 1700, 0])
^  Redo: (258) [user] subst_vars([";;             (@param \"Second argument\")", 1700, 0], _192486, [], _181286)
^  Unify: (258) [user] subst_vars([";;             (@param \"Second argument\")", 1700, 0], [_196222|_196224], [], _181286)
^  Call: (259) [user] subst_vars(";;             (@param \"Second argument\")", _196222, [], _197162)
^  Unify: (259) [user] subst_vars(";;             (@param \"Second argument\")", ";;             (@param \"Second argument\")", [], [])
   Call: (260) [system] var(";;             (@param \"Second argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"Second argument\")", _196222, [], _197162)
^  Unify: (259) [user] subst_vars(";;             (@param \"Second argument\")", _196222, [], _197162)
   Call: (260) [system] atom(";;             (@param \"Second argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"Second argument\")", _196222, [], _197162)
^  Unify: (259) [user] subst_vars(";;             (@param \"Second argument\")", _196222, [], _197162)
   Call: (260) [system] compound(";;             (@param \"Second argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"Second argument\")", _196222, [], _197162)
^  Unify: (259) [user] subst_vars(";;             (@param \"Second argument\")", ";;             (@param \"Second argument\")", [], [])
^  Exit: (259) [user] subst_vars(";;             (@param \"Second argument\")", ";;             (@param \"Second argument\")", [], [])
^  Call: (259) [user] subst_vars([1700, 0], _196224, [], _181286)
^  Unify: (259) [user] subst_vars([1700, 0], [1700, 0], [], [])
   Call: (260) [system] var([1700, 0])
^  Redo: (259) [user] subst_vars([1700, 0], _196224, [], _181286)
^  Unify: (259) [user] subst_vars([1700, 0], [_212094|_212096], [], _181286)
^  Call: (260) [user] subst_vars(1700, _212094, [], _213034)
^  Unify: (260) [user] subst_vars(1700, 1700, [], [])
   Call: (261) [system] var(1700)
^  Redo: (260) [user] subst_vars(1700, _212094, [], _213034)
^  Unify: (260) [user] subst_vars(1700, _212094, [], _213034)
   Call: (261) [system] atom(1700)
^  Redo: (260) [user] subst_vars(1700, _212094, [], _213034)
^  Unify: (260) [user] subst_vars(1700, _212094, [], _213034)
   Call: (261) [system] compound(1700)
^  Redo: (260) [user] subst_vars(1700, _212094, [], _213034)
^  Unify: (260) [user] subst_vars(1700, 1700, [], [])
^  Exit: (260) [user] subst_vars(1700, 1700, [], [])
^  Call: (260) [user] subst_vars([0], _212096, [], _181286)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _212096, [], _181286)
^  Unify: (260) [user] subst_vars([0], [_227966|_227968], [], _181286)
^  Call: (261) [user] subst_vars(0, _227966, [], _228906)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _227966, [], _228906)
^  Unify: (261) [user] subst_vars(0, _227966, [], _228906)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _227966, [], _228906)
^  Unify: (261) [user] subst_vars(0, _227966, [], _228906)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _227966, [], _228906)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _227968, [], _181286)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _227968, [], _181286)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1700, 0], [1700, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (@param \"Second argument\")", 1700, 0], [";;             (@param \"Second argument\")", 1700, 0], [], [])
   Call: (258) [system] compound_name_arguments(_181284, '$COMMENT', [";;             (@param \"Second argument\")", 1700, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT', [";;             (@param \"Second argument\")", 1700, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), [], [])
   Call: (257) [system] _251324=metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1700, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1701, 0, 60810, '$COMMENT'(";;           ))", 1701, 0), '$stream_position'(60810, 1701, 0, 60844)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           ))", 1701, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           ))", 1701, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;           ))", 1701, 0), _304044))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           ))", 1701, 0), _304044))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;           ))", 1701, 0), _304044)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           ))", 1701, 0), _304044)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;           ))", 1701, 0), _304044)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;           ))", 1701, 0), _304044)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;           ))", 1701, 0), _309656))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           ))", 1701, 0), _309656))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;           ))", 1701, 0), _309656))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           ))", 1701, 0), _309656))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           ))", 1701, 0), _309656)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           ))", 1701, 0), _309656)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;           ))", 1701, 0), _315242))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           ))", 1701, 0), _315242))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;           ))", 1701, 0), _315242)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           ))", 1701, 0), _315242)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1701, 0), _315242)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1701, 0), _315242)
   Call: (270) [system] var('$COMMENT'(";;           ))", 1701, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1701, 0), _315242)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1701, 0), '$VAR'(_322702))
   Call: (270) [system] atom('$COMMENT'(";;           ))", 1701, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1701, 0), _315242)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1701, 0), _315242)
   Call: (270) [system] '$COMMENT'(";;           ))", 1701, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1701, 0), _315242)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1701, 0), _315242)
   Call: (270) [system] '$COMMENT'(";;           ))", 1701, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1701, 0), _315242)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1701, 0), _315242)
   Call: (270) [system] '$COMMENT'(";;           ))", 1701, 0)==[_331982, _331988]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1701, 0), _315242)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1701, 0), _315242)
   Call: (270) [system] is_list('$COMMENT'(";;           ))", 1701, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1701, 0), _315242)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1701, 0), _315242)
   Call: (270) [system] string('$COMMENT'(";;           ))", 1701, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1701, 0), _315242)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1701, 0), _315242)
   Call: (270) [system] compound('$COMMENT'(";;           ))", 1701, 0))
   Exit: (270) [system] compound('$COMMENT'(";;           ))", 1701, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;           ))", 1701, 0), _342184, _342186)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           ))", 1701, 0), '$COMMENT', [";;           ))", 1701, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;           ))", 1701, 0], _345926)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;           ))", 1701, 0], _345926)
   Call: (271) [apply] apply:maplist_([";;           ))", 1701, 0], _345926, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;           ))", 1701, 0], [_348744|_348746], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;           ))", _348744)
^  Unify: (272) [user] mfix_vars1(";;           ))", _348744)
   Call: (273) [system] var(";;           ))")
^  Redo: (272) [user] mfix_vars1(";;           ))", _348744)
^  Unify: (272) [user] mfix_vars1(";;           ))", '$VAR'(_353390))
   Call: (273) [system] atom(";;           ))")
^  Redo: (272) [user] mfix_vars1(";;           ))", _348744)
^  Unify: (272) [user] mfix_vars1(";;           ))", _348744)
   Call: (273) [system] ";;           ))"==true
^  Redo: (272) [user] mfix_vars1(";;           ))", _348744)
^  Unify: (272) [user] mfix_vars1(";;           ))", _348744)
   Call: (273) [system] ";;           ))"==false
^  Redo: (272) [user] mfix_vars1(";;           ))", _348744)
^  Unify: (272) [user] mfix_vars1(";;           ))", _348744)
   Call: (273) [system] ";;           ))"==[_362670, _362676]
^  Redo: (272) [user] mfix_vars1(";;           ))", _348744)
^  Unify: (272) [user] mfix_vars1(";;           ))", _348744)
   Call: (273) [system] is_list(";;           ))")
^  Redo: (272) [user] mfix_vars1(";;           ))", _348744)
^  Unify: (272) [user] mfix_vars1(";;           ))", _348744)
   Call: (273) [system] string(";;           ))")
   Exit: (273) [system] string(";;           ))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;           ))", _348744)
^  Unify: (272) [user] mfix_vars1(";;           ))", _348744)
   Call: (273) [system] compound(";;           ))")
^  Redo: (272) [user] mfix_vars1(";;           ))", _348744)
^  Unify: (272) [user] mfix_vars1(";;           ))", _348744)
^  Call: (273) [user] symbol(";;           ))")
^  Unify: (273) [user] symbol(";;           ))")
   Call: (274) [system] atom(";;           ))")
   Fail: (274) [system] atom(";;           ))")
^  Fail: (273) [user] symbol(";;           ))")
^  Redo: (272) [user] mfix_vars1(";;           ))", _348744)
   Call: (273) [system] ";;           ))"=_348744
   Exit: (273) [system] ";;           ))"=";;           ))"
^  Exit: (272) [user] mfix_vars1(";;           ))", ";;           ))")
   Call: (272) [apply] apply:maplist_([1701, 0], _348746, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1701, 0], [_386742|_386744], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1701, _386742)
^  Unify: (273) [user] mfix_vars1(1701, _386742)
   Call: (274) [system] var(1701)
^  Redo: (273) [user] mfix_vars1(1701, _386742)
^  Unify: (273) [user] mfix_vars1(1701, '$VAR'(_391388))
   Call: (274) [system] atom(1701)
^  Redo: (273) [user] mfix_vars1(1701, _386742)
^  Unify: (273) [user] mfix_vars1(1701, _386742)
   Call: (274) [system] 1701==true
^  Redo: (273) [user] mfix_vars1(1701, _386742)
^  Unify: (273) [user] mfix_vars1(1701, _386742)
   Call: (274) [system] 1701==false
^  Redo: (273) [user] mfix_vars1(1701, _386742)
^  Unify: (273) [user] mfix_vars1(1701, _386742)
   Call: (274) [system] 1701==[_400668, _400674]
^  Redo: (273) [user] mfix_vars1(1701, _386742)
^  Unify: (273) [user] mfix_vars1(1701, _386742)
   Call: (274) [system] is_list(1701)
^  Redo: (273) [user] mfix_vars1(1701, _386742)
^  Unify: (273) [user] mfix_vars1(1701, _386742)
   Call: (274) [system] string(1701)
^  Redo: (273) [user] mfix_vars1(1701, _386742)
^  Unify: (273) [user] mfix_vars1(1701, _386742)
   Call: (274) [system] compound(1701)
^  Redo: (273) [user] mfix_vars1(1701, _386742)
^  Unify: (273) [user] mfix_vars1(1701, _386742)
^  Call: (274) [user] symbol(1701)
^  Unify: (274) [user] symbol(1701)
   Call: (275) [system] atom(1701)
   Fail: (275) [system] atom(1701)
^  Fail: (274) [user] symbol(1701)
^  Redo: (273) [user] mfix_vars1(1701, _386742)
   Call: (274) [system] 1701=_386742
   Exit: (274) [system] 1701=1701
^  Exit: (273) [user] mfix_vars1(1701, 1701)
   Call: (273) [apply] apply:maplist_([0], _386744, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_421068|_421070], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _421068)
^  Unify: (274) [user] mfix_vars1(0, _421068)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _421068)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_425714))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _421068)
^  Unify: (274) [user] mfix_vars1(0, _421068)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _421068)
^  Unify: (274) [user] mfix_vars1(0, _421068)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _421068)
^  Unify: (274) [user] mfix_vars1(0, _421068)
   Call: (275) [system] 0==[_434994, _435000]
^  Redo: (274) [user] mfix_vars1(0, _421068)
^  Unify: (274) [user] mfix_vars1(0, _421068)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _421068)
^  Unify: (274) [user] mfix_vars1(0, _421068)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _421068)
^  Unify: (274) [user] mfix_vars1(0, _421068)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _421068)
^  Unify: (274) [user] mfix_vars1(0, _421068)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _421068)
   Call: (275) [system] 0=_421068
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _421070, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1701, 0], [1701, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;           ))", 1701, 0], [";;           ))", 1701, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;           ))", 1701, 0], [";;           ))", 1701, 0])
   Call: (270) [system] compound_name_arguments(_315242, '$COMMENT', [";;           ))", 1701, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           ))", 1701, 0), '$COMMENT', [";;           ))", 1701, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0)))
   Call: (267) [system] '$COMMENT'(";;           ))", 1701, 0)\=@='$COMMENT'(";;           ))", 1701, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           ))", 1701, 0), _309656)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;           ))", 1701, 0), _471242))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           ))", 1701, 0), _471242))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;           ))", 1701, 0), _471242))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           ))", 1701, 0), _471242))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;           ))", 1701, 0), _471242)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           ))", 1701, 0), _471242)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;           ))", 1701, 0), _476828))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           ))", 1701, 0), _476828))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;           ))", 1701, 0), _476828)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           ))", 1701, 0), _476828)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;           ))", 1701, 0), _476828)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0)))
   Call: (267) [system] '$COMMENT'(";;           ))", 1701, 0)\=@='$COMMENT'(";;           ))", 1701, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;           ))", 1701, 0), _471242)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;           ))", 1701, 0), _304044))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           ))", 1701, 0), _304044))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;           ))", 1701, 0), _304044))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           ))", 1701, 0), _304044))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;           ))", 1701, 0), _304044)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           ))", 1701, 0), _304044)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;           ))", 1701, 0), _499148))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           ))", 1701, 0), _499148))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;           ))", 1701, 0), _499148)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           ))", 1701, 0), _499148)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;           ))", 1701, 0), _499148)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0)))
   Call: (267) [system] '$COMMENT'(";;           ))", 1701, 0)\=@='$COMMENT'(";;           ))", 1701, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;           ))", 1701, 0), _304044)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0)))
   Call: (261) [system] '$COMMENT'(";;           ))", 1701, 0)\=@='$COMMENT'(";;           ))", 1701, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           ))", 1701, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1701, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1701, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1701, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1701, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1701, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1701, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;           ))", 1701, 0), _9980, [], _9982)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;           ))", 1701, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           ))", 1701, 0), _9980, [], _9982)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           ))", 1701, 0), _9980, [], _9982)
   Call: (258) [system] atom('$COMMENT'(";;           ))", 1701, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           ))", 1701, 0), _9980, [], _9982)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           ))", 1701, 0), _9980, [], _9982)
   Call: (258) [system] compound('$COMMENT'(";;           ))", 1701, 0))
   Exit: (258) [system] compound('$COMMENT'(";;           ))", 1701, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;           ))", 1701, 0), _19296, _19298)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           ))", 1701, 0), '$COMMENT', [";;           ))", 1701, 0])
^  Call: (258) [user] subst_vars([";;           ))", 1701, 0], _21182, [], _9982)
^  Unify: (258) [user] subst_vars([";;           ))", 1701, 0], [";;           ))", 1701, 0], [], [])
   Call: (259) [system] var([";;           ))", 1701, 0])
^  Redo: (258) [user] subst_vars([";;           ))", 1701, 0], _21182, [], _9982)
^  Unify: (258) [user] subst_vars([";;           ))", 1701, 0], [_24918|_24920], [], _9982)
^  Call: (259) [user] subst_vars(";;           ))", _24918, [], _25858)
^  Unify: (259) [user] subst_vars(";;           ))", ";;           ))", [], [])
   Call: (260) [system] var(";;           ))")
^  Redo: (259) [user] subst_vars(";;           ))", _24918, [], _25858)
^  Unify: (259) [user] subst_vars(";;           ))", _24918, [], _25858)
   Call: (260) [system] atom(";;           ))")
^  Redo: (259) [user] subst_vars(";;           ))", _24918, [], _25858)
^  Unify: (259) [user] subst_vars(";;           ))", _24918, [], _25858)
   Call: (260) [system] compound(";;           ))")
^  Redo: (259) [user] subst_vars(";;           ))", _24918, [], _25858)
^  Unify: (259) [user] subst_vars(";;           ))", ";;           ))", [], [])
^  Exit: (259) [user] subst_vars(";;           ))", ";;           ))", [], [])
^  Call: (259) [user] subst_vars([1701, 0], _24920, [], _9982)
^  Unify: (259) [user] subst_vars([1701, 0], [1701, 0], [], [])
   Call: (260) [system] var([1701, 0])
^  Redo: (259) [user] subst_vars([1701, 0], _24920, [], _9982)
^  Unify: (259) [user] subst_vars([1701, 0], [_40790|_40792], [], _9982)
^  Call: (260) [user] subst_vars(1701, _40790, [], _41730)
^  Unify: (260) [user] subst_vars(1701, 1701, [], [])
   Call: (261) [system] var(1701)
^  Redo: (260) [user] subst_vars(1701, _40790, [], _41730)
^  Unify: (260) [user] subst_vars(1701, _40790, [], _41730)
   Call: (261) [system] atom(1701)
^  Redo: (260) [user] subst_vars(1701, _40790, [], _41730)
^  Unify: (260) [user] subst_vars(1701, _40790, [], _41730)
   Call: (261) [system] compound(1701)
^  Redo: (260) [user] subst_vars(1701, _40790, [], _41730)
^  Unify: (260) [user] subst_vars(1701, 1701, [], [])
^  Exit: (260) [user] subst_vars(1701, 1701, [], [])
^  Call: (260) [user] subst_vars([0], _40792, [], _9982)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _40792, [], _9982)
^  Unify: (260) [user] subst_vars([0], [_56662|_56664], [], _9982)
^  Call: (261) [user] subst_vars(0, _56662, [], _57602)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _56662, [], _57602)
^  Unify: (261) [user] subst_vars(0, _56662, [], _57602)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _56662, [], _57602)
^  Unify: (261) [user] subst_vars(0, _56662, [], _57602)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _56662, [], _57602)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _56664, [], _9982)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _56664, [], _9982)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1701, 0], [1701, 0], [], [])
^  Exit: (258) [user] subst_vars([";;           ))", 1701, 0], [";;           ))", 1701, 0], [], [])
   Call: (258) [system] compound_name_arguments(_9980, '$COMMENT', [";;           ))", 1701, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           ))", 1701, 0), '$COMMENT', [";;           ))", 1701, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;           ))", 1701, 0), '$COMMENT'(";;           ))", 1701, 0), [], [])
   Call: (257) [system] _80020=metta_file_buffer(+, '$COMMENT'(";;           ))", 1701, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;           ))", 1701, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;           ))", 1701, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           ))", 1701, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           ))", 1701, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           ))", 1701, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           ))", 1701, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           ))", 1701, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           ))", 1701, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1702, 0, 60826, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$stream_position'(60826, 1702, 0, 60860)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _132744))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _132744))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _132744)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _132744)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _132744)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _132744)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _138356))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _138356))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _138356))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _138356))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _138356)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _138356)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _143942))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _143942))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _143942)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _143942)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _143942)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _143942)
   Call: (270) [system] var('$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _143942)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$VAR'(_151402))
   Call: (270) [system] atom('$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _143942)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _143942)
   Call: (270) [system] '$COMMENT'(";;           (@return \"Return value\")", 1702, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _143942)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _143942)
   Call: (270) [system] '$COMMENT'(";;           (@return \"Return value\")", 1702, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _143942)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _143942)
   Call: (270) [system] '$COMMENT'(";;           (@return \"Return value\")", 1702, 0)==[_160682, _160688]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _143942)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _143942)
   Call: (270) [system] is_list('$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _143942)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _143942)
   Call: (270) [system] string('$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _143942)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _143942)
   Call: (270) [system] compound('$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
   Exit: (270) [system] compound('$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _170884, _170886)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT', [";;           (@return \"Return value\")", 1702, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;           (@return \"Return value\")", 1702, 0], _174626)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@return \"Return value\")", 1702, 0], _174626)
   Call: (271) [apply] apply:maplist_([";;           (@return \"Return value\")", 1702, 0], _174626, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;           (@return \"Return value\")", 1702, 0], [_177444|_177446], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _177444)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _177444)
   Call: (273) [system] var(";;           (@return \"Return value\")")
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _177444)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", '$VAR'(_182090))
   Call: (273) [system] atom(";;           (@return \"Return value\")")
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _177444)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _177444)
   Call: (273) [system] ";;           (@return \"Return value\")"==true
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _177444)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _177444)
   Call: (273) [system] ";;           (@return \"Return value\")"==false
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _177444)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _177444)
   Call: (273) [system] ";;           (@return \"Return value\")"==[_191370, _191376]
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _177444)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _177444)
   Call: (273) [system] is_list(";;           (@return \"Return value\")")
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _177444)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _177444)
   Call: (273) [system] string(";;           (@return \"Return value\")")
   Exit: (273) [system] string(";;           (@return \"Return value\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _177444)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _177444)
   Call: (273) [system] compound(";;           (@return \"Return value\")")
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _177444)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _177444)
^  Call: (273) [user] symbol(";;           (@return \"Return value\")")
^  Unify: (273) [user] symbol(";;           (@return \"Return value\")")
   Call: (274) [system] atom(";;           (@return \"Return value\")")
   Fail: (274) [system] atom(";;           (@return \"Return value\")")
^  Fail: (273) [user] symbol(";;           (@return \"Return value\")")
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _177444)
   Call: (273) [system] ";;           (@return \"Return value\")"=_177444
   Exit: (273) [system] ";;           (@return \"Return value\")"=";;           (@return \"Return value\")"
^  Exit: (272) [user] mfix_vars1(";;           (@return \"Return value\")", ";;           (@return \"Return value\")")
   Call: (272) [apply] apply:maplist_([1702, 0], _177446, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1702, 0], [_215442|_215444], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1702, _215442)
^  Unify: (273) [user] mfix_vars1(1702, _215442)
   Call: (274) [system] var(1702)
^  Redo: (273) [user] mfix_vars1(1702, _215442)
^  Unify: (273) [user] mfix_vars1(1702, '$VAR'(_220088))
   Call: (274) [system] atom(1702)
^  Redo: (273) [user] mfix_vars1(1702, _215442)
^  Unify: (273) [user] mfix_vars1(1702, _215442)
   Call: (274) [system] 1702==true
^  Redo: (273) [user] mfix_vars1(1702, _215442)
^  Unify: (273) [user] mfix_vars1(1702, _215442)
   Call: (274) [system] 1702==false
^  Redo: (273) [user] mfix_vars1(1702, _215442)
^  Unify: (273) [user] mfix_vars1(1702, _215442)
   Call: (274) [system] 1702==[_229368, _229374]
^  Redo: (273) [user] mfix_vars1(1702, _215442)
^  Unify: (273) [user] mfix_vars1(1702, _215442)
   Call: (274) [system] is_list(1702)
^  Redo: (273) [user] mfix_vars1(1702, _215442)
^  Unify: (273) [user] mfix_vars1(1702, _215442)
   Call: (274) [system] string(1702)
^  Redo: (273) [user] mfix_vars1(1702, _215442)
^  Unify: (273) [user] mfix_vars1(1702, _215442)
   Call: (274) [system] compound(1702)
^  Redo: (273) [user] mfix_vars1(1702, _215442)
^  Unify: (273) [user] mfix_vars1(1702, _215442)
^  Call: (274) [user] symbol(1702)
^  Unify: (274) [user] symbol(1702)
   Call: (275) [system] atom(1702)
   Fail: (275) [system] atom(1702)
^  Fail: (274) [user] symbol(1702)
^  Redo: (273) [user] mfix_vars1(1702, _215442)
   Call: (274) [system] 1702=_215442
   Exit: (274) [system] 1702=1702
^  Exit: (273) [user] mfix_vars1(1702, 1702)
   Call: (273) [apply] apply:maplist_([0], _215444, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_249768|_249770], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _249768)
^  Unify: (274) [user] mfix_vars1(0, _249768)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _249768)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_254414))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _249768)
^  Unify: (274) [user] mfix_vars1(0, _249768)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _249768)
^  Unify: (274) [user] mfix_vars1(0, _249768)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _249768)
^  Unify: (274) [user] mfix_vars1(0, _249768)
   Call: (275) [system] 0==[_263694, _263700]
^  Redo: (274) [user] mfix_vars1(0, _249768)
^  Unify: (274) [user] mfix_vars1(0, _249768)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _249768)
^  Unify: (274) [user] mfix_vars1(0, _249768)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _249768)
^  Unify: (274) [user] mfix_vars1(0, _249768)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _249768)
^  Unify: (274) [user] mfix_vars1(0, _249768)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _249768)
   Call: (275) [system] 0=_249768
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _249770, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1702, 0], [1702, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;           (@return \"Return value\")", 1702, 0], [";;           (@return \"Return value\")", 1702, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@return \"Return value\")", 1702, 0], [";;           (@return \"Return value\")", 1702, 0])
   Call: (270) [system] compound_name_arguments(_143942, '$COMMENT', [";;           (@return \"Return value\")", 1702, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT', [";;           (@return \"Return value\")", 1702, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@return \"Return value\")", 1702, 0)\=@='$COMMENT'(";;           (@return \"Return value\")", 1702, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _138356)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _299942))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _299942))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _299942))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _299942))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _299942)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _299942)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _305528))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _305528))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _305528)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _305528)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _305528)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@return \"Return value\")", 1702, 0)\=@='$COMMENT'(";;           (@return \"Return value\")", 1702, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _299942)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _132744))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _132744))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _132744))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _132744))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _132744)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _132744)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _327848))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _327848))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _327848)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _327848)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _327848)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@return \"Return value\")", 1702, 0)\=@='$COMMENT'(";;           (@return \"Return value\")", 1702, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _132744)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0)))
   Call: (261) [system] '$COMMENT'(";;           (@return \"Return value\")", 1702, 0)\=@='$COMMENT'(";;           (@return \"Return value\")", 1702, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _356626, [], _356628)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _356626, [], _356628)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _356626, [], _356628)
   Call: (258) [system] atom('$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _356626, [], _356628)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _356626, [], _356628)
   Call: (258) [system] compound('$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
   Exit: (258) [system] compound('$COMMENT'(";;           (@return \"Return value\")", 1702, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), _365942, _365944)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT', [";;           (@return \"Return value\")", 1702, 0])
^  Call: (258) [user] subst_vars([";;           (@return \"Return value\")", 1702, 0], _367828, [], _356628)
^  Unify: (258) [user] subst_vars([";;           (@return \"Return value\")", 1702, 0], [";;           (@return \"Return value\")", 1702, 0], [], [])
   Call: (259) [system] var([";;           (@return \"Return value\")", 1702, 0])
^  Redo: (258) [user] subst_vars([";;           (@return \"Return value\")", 1702, 0], _367828, [], _356628)
^  Unify: (258) [user] subst_vars([";;           (@return \"Return value\")", 1702, 0], [_371564|_371566], [], _356628)
^  Call: (259) [user] subst_vars(";;           (@return \"Return value\")", _371564, [], _372504)
^  Unify: (259) [user] subst_vars(";;           (@return \"Return value\")", ";;           (@return \"Return value\")", [], [])
   Call: (260) [system] var(";;           (@return \"Return value\")")
^  Redo: (259) [user] subst_vars(";;           (@return \"Return value\")", _371564, [], _372504)
^  Unify: (259) [user] subst_vars(";;           (@return \"Return value\")", _371564, [], _372504)
   Call: (260) [system] atom(";;           (@return \"Return value\")")
^  Redo: (259) [user] subst_vars(";;           (@return \"Return value\")", _371564, [], _372504)
^  Unify: (259) [user] subst_vars(";;           (@return \"Return value\")", _371564, [], _372504)
   Call: (260) [system] compound(";;           (@return \"Return value\")")
^  Redo: (259) [user] subst_vars(";;           (@return \"Return value\")", _371564, [], _372504)
^  Unify: (259) [user] subst_vars(";;           (@return \"Return value\")", ";;           (@return \"Return value\")", [], [])
^  Exit: (259) [user] subst_vars(";;           (@return \"Return value\")", ";;           (@return \"Return value\")", [], [])
^  Call: (259) [user] subst_vars([1702, 0], _371566, [], _356628)
^  Unify: (259) [user] subst_vars([1702, 0], [1702, 0], [], [])
   Call: (260) [system] var([1702, 0])
^  Redo: (259) [user] subst_vars([1702, 0], _371566, [], _356628)
^  Unify: (259) [user] subst_vars([1702, 0], [_387436|_387438], [], _356628)
^  Call: (260) [user] subst_vars(1702, _387436, [], _388376)
^  Unify: (260) [user] subst_vars(1702, 1702, [], [])
   Call: (261) [system] var(1702)
^  Redo: (260) [user] subst_vars(1702, _387436, [], _388376)
^  Unify: (260) [user] subst_vars(1702, _387436, [], _388376)
   Call: (261) [system] atom(1702)
^  Redo: (260) [user] subst_vars(1702, _387436, [], _388376)
^  Unify: (260) [user] subst_vars(1702, _387436, [], _388376)
   Call: (261) [system] compound(1702)
^  Redo: (260) [user] subst_vars(1702, _387436, [], _388376)
^  Unify: (260) [user] subst_vars(1702, 1702, [], [])
^  Exit: (260) [user] subst_vars(1702, 1702, [], [])
^  Call: (260) [user] subst_vars([0], _387438, [], _356628)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _387438, [], _356628)
^  Unify: (260) [user] subst_vars([0], [_403308|_403310], [], _356628)
^  Call: (261) [user] subst_vars(0, _403308, [], _404248)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _403308, [], _404248)
^  Unify: (261) [user] subst_vars(0, _403308, [], _404248)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _403308, [], _404248)
^  Unify: (261) [user] subst_vars(0, _403308, [], _404248)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _403308, [], _404248)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _403310, [], _356628)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _403310, [], _356628)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1702, 0], [1702, 0], [], [])
^  Exit: (258) [user] subst_vars([";;           (@return \"Return value\")", 1702, 0], [";;           (@return \"Return value\")", 1702, 0], [], [])
   Call: (258) [system] compound_name_arguments(_356626, '$COMMENT', [";;           (@return \"Return value\")", 1702, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT', [";;           (@return \"Return value\")", 1702, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1702, 0), '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), [], [])
   Call: (257) [system] _426666=metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1702, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1703, 0, 60864, '$COMMENT'(";;         )", 1703, 0), '$stream_position'(60864, 1703, 0, 60898)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         )", 1703, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         )", 1703, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         )", 1703, 0), _479384))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         )", 1703, 0), _479384))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         )", 1703, 0), _479384)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         )", 1703, 0), _479384)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         )", 1703, 0), _479384)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         )", 1703, 0), _479384)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         )", 1703, 0), _484996))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         )", 1703, 0), _484996))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         )", 1703, 0), _484996))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         )", 1703, 0), _484996))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         )", 1703, 0), _484996)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         )", 1703, 0), _484996)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         )", 1703, 0), _490582))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         )", 1703, 0), _490582))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         )", 1703, 0), _490582)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         )", 1703, 0), _490582)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1703, 0), _490582)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1703, 0), _490582)
   Call: (270) [system] var('$COMMENT'(";;         )", 1703, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1703, 0), _490582)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1703, 0), '$VAR'(_498042))
   Call: (270) [system] atom('$COMMENT'(";;         )", 1703, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1703, 0), _490582)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1703, 0), _490582)
   Call: (270) [system] '$COMMENT'(";;         )", 1703, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1703, 0), _490582)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1703, 0), _490582)
   Call: (270) [system] '$COMMENT'(";;         )", 1703, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1703, 0), _490582)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1703, 0), _490582)
   Call: (270) [system] '$COMMENT'(";;         )", 1703, 0)==[_507322, _507328]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1703, 0), _490582)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1703, 0), _490582)
   Call: (270) [system] is_list('$COMMENT'(";;         )", 1703, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1703, 0), _490582)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1703, 0), _490582)
   Call: (270) [system] string('$COMMENT'(";;         )", 1703, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1703, 0), _490582)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1703, 0), _490582)
   Call: (270) [system] compound('$COMMENT'(";;         )", 1703, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         )", 1703, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         )", 1703, 0), _517524, _517526)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         )", 1703, 0), '$COMMENT', [";;         )", 1703, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         )", 1703, 0], _521266)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         )", 1703, 0], _521266)
   Call: (271) [apply] apply:maplist_([";;         )", 1703, 0], _521266, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         )", 1703, 0], [_6026|_6028], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         )", _6026)
^  Unify: (272) [user] mfix_vars1(";;         )", _6026)
   Call: (273) [system] var(";;         )")
^  Redo: (272) [user] mfix_vars1(";;         )", _6026)
^  Unify: (272) [user] mfix_vars1(";;         )", '$VAR'(_10632))
   Call: (273) [system] atom(";;         )")
^  Redo: (272) [user] mfix_vars1(";;         )", _6026)
^  Unify: (272) [user] mfix_vars1(";;         )", _6026)
   Call: (273) [system] ";;         )"==true
^  Redo: (272) [user] mfix_vars1(";;         )", _6026)
^  Unify: (272) [user] mfix_vars1(";;         )", _6026)
   Call: (273) [system] ";;         )"==false
^  Redo: (272) [user] mfix_vars1(";;         )", _6026)
^  Unify: (272) [user] mfix_vars1(";;         )", _6026)
   Call: (273) [system] ";;         )"==[_19912, _19918]
^  Redo: (272) [user] mfix_vars1(";;         )", _6026)
^  Unify: (272) [user] mfix_vars1(";;         )", _6026)
   Call: (273) [system] is_list(";;         )")
^  Redo: (272) [user] mfix_vars1(";;         )", _6026)
^  Unify: (272) [user] mfix_vars1(";;         )", _6026)
   Call: (273) [system] string(";;         )")
   Exit: (273) [system] string(";;         )")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         )", _6026)
^  Unify: (272) [user] mfix_vars1(";;         )", _6026)
   Call: (273) [system] compound(";;         )")
^  Redo: (272) [user] mfix_vars1(";;         )", _6026)
^  Unify: (272) [user] mfix_vars1(";;         )", _6026)
^  Call: (273) [user] symbol(";;         )")
^  Unify: (273) [user] symbol(";;         )")
   Call: (274) [system] atom(";;         )")
   Fail: (274) [system] atom(";;         )")
^  Fail: (273) [user] symbol(";;         )")
^  Redo: (272) [user] mfix_vars1(";;         )", _6026)
   Call: (273) [system] ";;         )"=_6026
   Exit: (273) [system] ";;         )"=";;         )"
^  Exit: (272) [user] mfix_vars1(";;         )", ";;         )")
   Call: (272) [apply] apply:maplist_([1703, 0], _6028, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1703, 0], [_43984|_43986], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1703, _43984)
^  Unify: (273) [user] mfix_vars1(1703, _43984)
   Call: (274) [system] var(1703)
^  Redo: (273) [user] mfix_vars1(1703, _43984)
^  Unify: (273) [user] mfix_vars1(1703, '$VAR'(_48630))
   Call: (274) [system] atom(1703)
^  Redo: (273) [user] mfix_vars1(1703, _43984)
^  Unify: (273) [user] mfix_vars1(1703, _43984)
   Call: (274) [system] 1703==true
^  Redo: (273) [user] mfix_vars1(1703, _43984)
^  Unify: (273) [user] mfix_vars1(1703, _43984)
   Call: (274) [system] 1703==false
^  Redo: (273) [user] mfix_vars1(1703, _43984)
^  Unify: (273) [user] mfix_vars1(1703, _43984)
   Call: (274) [system] 1703==[_57910, _57916]
^  Redo: (273) [user] mfix_vars1(1703, _43984)
^  Unify: (273) [user] mfix_vars1(1703, _43984)
   Call: (274) [system] is_list(1703)
^  Redo: (273) [user] mfix_vars1(1703, _43984)
^  Unify: (273) [user] mfix_vars1(1703, _43984)
   Call: (274) [system] string(1703)
^  Redo: (273) [user] mfix_vars1(1703, _43984)
^  Unify: (273) [user] mfix_vars1(1703, _43984)
   Call: (274) [system] compound(1703)
^  Redo: (273) [user] mfix_vars1(1703, _43984)
^  Unify: (273) [user] mfix_vars1(1703, _43984)
^  Call: (274) [user] symbol(1703)
^  Unify: (274) [user] symbol(1703)
   Call: (275) [system] atom(1703)
   Fail: (275) [system] atom(1703)
^  Fail: (274) [user] symbol(1703)
^  Redo: (273) [user] mfix_vars1(1703, _43984)
   Call: (274) [system] 1703=_43984
   Exit: (274) [system] 1703=1703
^  Exit: (273) [user] mfix_vars1(1703, 1703)
   Call: (273) [apply] apply:maplist_([0], _43986, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_78310|_78312], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _78310)
^  Unify: (274) [user] mfix_vars1(0, _78310)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _78310)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_82956))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _78310)
^  Unify: (274) [user] mfix_vars1(0, _78310)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _78310)
^  Unify: (274) [user] mfix_vars1(0, _78310)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _78310)
^  Unify: (274) [user] mfix_vars1(0, _78310)
   Call: (275) [system] 0==[_92236, _92242]
^  Redo: (274) [user] mfix_vars1(0, _78310)
^  Unify: (274) [user] mfix_vars1(0, _78310)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _78310)
^  Unify: (274) [user] mfix_vars1(0, _78310)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _78310)
^  Unify: (274) [user] mfix_vars1(0, _78310)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _78310)
^  Unify: (274) [user] mfix_vars1(0, _78310)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _78310)
   Call: (275) [system] 0=_78310
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _78312, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1703, 0], [1703, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         )", 1703, 0], [";;         )", 1703, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         )", 1703, 0], [";;         )", 1703, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";;         )", 1703, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         )", 1703, 0), '$COMMENT', [";;         )", 1703, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0)))
   Call: (267) [system] '$COMMENT'(";;         )", 1703, 0)\=@='$COMMENT'(";;         )", 1703, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         )", 1703, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         )", 1703, 0), _128484))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         )", 1703, 0), _128484))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         )", 1703, 0), _128484))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         )", 1703, 0), _128484))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         )", 1703, 0), _128484)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         )", 1703, 0), _128484)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         )", 1703, 0), _134070))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         )", 1703, 0), _134070))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         )", 1703, 0), _134070)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         )", 1703, 0), _134070)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         )", 1703, 0), _134070)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0)))
   Call: (267) [system] '$COMMENT'(";;         )", 1703, 0)\=@='$COMMENT'(";;         )", 1703, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         )", 1703, 0), _128484)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         )", 1703, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         )", 1703, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         )", 1703, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         )", 1703, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         )", 1703, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         )", 1703, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         )", 1703, 0), _156390))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         )", 1703, 0), _156390))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         )", 1703, 0), _156390)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         )", 1703, 0), _156390)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         )", 1703, 0), _156390)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0)))
   Call: (267) [system] '$COMMENT'(";;         )", 1703, 0)\=@='$COMMENT'(";;         )", 1703, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         )", 1703, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0)))
   Call: (261) [system] '$COMMENT'(";;         )", 1703, 0)\=@='$COMMENT'(";;         )", 1703, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         )", 1703, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         )", 1703, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         )", 1703, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         )", 1703, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         )", 1703, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         )", 1703, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         )", 1703, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         )", 1703, 0), _185168, [], _185170)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         )", 1703, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         )", 1703, 0), _185168, [], _185170)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         )", 1703, 0), _185168, [], _185170)
   Call: (258) [system] atom('$COMMENT'(";;         )", 1703, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         )", 1703, 0), _185168, [], _185170)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         )", 1703, 0), _185168, [], _185170)
   Call: (258) [system] compound('$COMMENT'(";;         )", 1703, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         )", 1703, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         )", 1703, 0), _194484, _194486)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         )", 1703, 0), '$COMMENT', [";;         )", 1703, 0])
^  Call: (258) [user] subst_vars([";;         )", 1703, 0], _196370, [], _185170)
^  Unify: (258) [user] subst_vars([";;         )", 1703, 0], [";;         )", 1703, 0], [], [])
   Call: (259) [system] var([";;         )", 1703, 0])
^  Redo: (258) [user] subst_vars([";;         )", 1703, 0], _196370, [], _185170)
^  Unify: (258) [user] subst_vars([";;         )", 1703, 0], [_200106|_200108], [], _185170)
^  Call: (259) [user] subst_vars(";;         )", _200106, [], _201046)
^  Unify: (259) [user] subst_vars(";;         )", ";;         )", [], [])
   Call: (260) [system] var(";;         )")
^  Redo: (259) [user] subst_vars(";;         )", _200106, [], _201046)
^  Unify: (259) [user] subst_vars(";;         )", _200106, [], _201046)
   Call: (260) [system] atom(";;         )")
^  Redo: (259) [user] subst_vars(";;         )", _200106, [], _201046)
^  Unify: (259) [user] subst_vars(";;         )", _200106, [], _201046)
   Call: (260) [system] compound(";;         )")
^  Redo: (259) [user] subst_vars(";;         )", _200106, [], _201046)
^  Unify: (259) [user] subst_vars(";;         )", ";;         )", [], [])
^  Exit: (259) [user] subst_vars(";;         )", ";;         )", [], [])
^  Call: (259) [user] subst_vars([1703, 0], _200108, [], _185170)
^  Unify: (259) [user] subst_vars([1703, 0], [1703, 0], [], [])
   Call: (260) [system] var([1703, 0])
^  Redo: (259) [user] subst_vars([1703, 0], _200108, [], _185170)
^  Unify: (259) [user] subst_vars([1703, 0], [_215978|_215980], [], _185170)
^  Call: (260) [user] subst_vars(1703, _215978, [], _216918)
^  Unify: (260) [user] subst_vars(1703, 1703, [], [])
   Call: (261) [system] var(1703)
^  Redo: (260) [user] subst_vars(1703, _215978, [], _216918)
^  Unify: (260) [user] subst_vars(1703, _215978, [], _216918)
   Call: (261) [system] atom(1703)
^  Redo: (260) [user] subst_vars(1703, _215978, [], _216918)
^  Unify: (260) [user] subst_vars(1703, _215978, [], _216918)
   Call: (261) [system] compound(1703)
^  Redo: (260) [user] subst_vars(1703, _215978, [], _216918)
^  Unify: (260) [user] subst_vars(1703, 1703, [], [])
^  Exit: (260) [user] subst_vars(1703, 1703, [], [])
^  Call: (260) [user] subst_vars([0], _215980, [], _185170)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _215980, [], _185170)
^  Unify: (260) [user] subst_vars([0], [_231850|_231852], [], _185170)
^  Call: (261) [user] subst_vars(0, _231850, [], _232790)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _231850, [], _232790)
^  Unify: (261) [user] subst_vars(0, _231850, [], _232790)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _231850, [], _232790)
^  Unify: (261) [user] subst_vars(0, _231850, [], _232790)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _231850, [], _232790)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _231852, [], _185170)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _231852, [], _185170)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1703, 0], [1703, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         )", 1703, 0], [";;         )", 1703, 0], [], [])
   Call: (258) [system] compound_name_arguments(_185168, '$COMMENT', [";;         )", 1703, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         )", 1703, 0), '$COMMENT', [";;         )", 1703, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         )", 1703, 0), '$COMMENT'(";;         )", 1703, 0), [], [])
   Call: (257) [system] _255208=metta_file_buffer(+, '$COMMENT'(";;         )", 1703, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         )", 1703, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         )", 1703, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         )", 1703, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         )", 1703, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         )", 1703, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         )", 1703, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         )", 1703, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         )", 1703, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1704, 0, 60877, '$COMMENT'(";;", 1704, 0), '$stream_position'(60877, 1704, 0, 60911)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1704, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1704, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1704, 0), _307924))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1704, 0), _307924))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1704, 0), _307924)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1704, 0), _307924)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1704, 0), _307924)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1704, 0), _307924)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1704, 0), _313536))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1704, 0), _313536))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1704, 0), _313536))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1704, 0), _313536))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1704, 0), _313536)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1704, 0), _313536)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1704, 0), _319122))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1704, 0), _319122))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1704, 0), _319122)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1704, 0), _319122)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1704, 0), _319122)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1704, 0), _319122)
   Call: (270) [system] var('$COMMENT'(";;", 1704, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1704, 0), _319122)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1704, 0), '$VAR'(_326582))
   Call: (270) [system] atom('$COMMENT'(";;", 1704, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1704, 0), _319122)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1704, 0), _319122)
   Call: (270) [system] '$COMMENT'(";;", 1704, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1704, 0), _319122)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1704, 0), _319122)
   Call: (270) [system] '$COMMENT'(";;", 1704, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1704, 0), _319122)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1704, 0), _319122)
   Call: (270) [system] '$COMMENT'(";;", 1704, 0)==[_335862, _335868]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1704, 0), _319122)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1704, 0), _319122)
   Call: (270) [system] is_list('$COMMENT'(";;", 1704, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1704, 0), _319122)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1704, 0), _319122)
   Call: (270) [system] string('$COMMENT'(";;", 1704, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1704, 0), _319122)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1704, 0), _319122)
   Call: (270) [system] compound('$COMMENT'(";;", 1704, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1704, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1704, 0), _346064, _346066)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1704, 0), '$COMMENT', [";;", 1704, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1704, 0], _349806)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1704, 0], _349806)
   Call: (271) [apply] apply:maplist_([";;", 1704, 0], _349806, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1704, 0], [_352624|_352626], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _352624)
^  Unify: (272) [user] mfix_vars1(";;", _352624)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _352624)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_357270))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _352624)
^  Unify: (272) [user] mfix_vars1(";;", _352624)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _352624)
^  Unify: (272) [user] mfix_vars1(";;", _352624)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _352624)
^  Unify: (272) [user] mfix_vars1(";;", _352624)
   Call: (273) [system] ";;"==[_366550, _366556]
^  Redo: (272) [user] mfix_vars1(";;", _352624)
^  Unify: (272) [user] mfix_vars1(";;", _352624)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _352624)
^  Unify: (272) [user] mfix_vars1(";;", _352624)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _352624)
^  Unify: (272) [user] mfix_vars1(";;", _352624)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _352624)
^  Unify: (272) [user] mfix_vars1(";;", _352624)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _352624)
   Call: (273) [system] ";;"=_352624
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1704, 0], _352626, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1704, 0], [_390622|_390624], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1704, _390622)
^  Unify: (273) [user] mfix_vars1(1704, _390622)
   Call: (274) [system] var(1704)
^  Redo: (273) [user] mfix_vars1(1704, _390622)
^  Unify: (273) [user] mfix_vars1(1704, '$VAR'(_395268))
   Call: (274) [system] atom(1704)
^  Redo: (273) [user] mfix_vars1(1704, _390622)
^  Unify: (273) [user] mfix_vars1(1704, _390622)
   Call: (274) [system] 1704==true
^  Redo: (273) [user] mfix_vars1(1704, _390622)
^  Unify: (273) [user] mfix_vars1(1704, _390622)
   Call: (274) [system] 1704==false
^  Redo: (273) [user] mfix_vars1(1704, _390622)
^  Unify: (273) [user] mfix_vars1(1704, _390622)
   Call: (274) [system] 1704==[_404548, _404554]
^  Redo: (273) [user] mfix_vars1(1704, _390622)
^  Unify: (273) [user] mfix_vars1(1704, _390622)
   Call: (274) [system] is_list(1704)
^  Redo: (273) [user] mfix_vars1(1704, _390622)
^  Unify: (273) [user] mfix_vars1(1704, _390622)
   Call: (274) [system] string(1704)
^  Redo: (273) [user] mfix_vars1(1704, _390622)
^  Unify: (273) [user] mfix_vars1(1704, _390622)
   Call: (274) [system] compound(1704)
^  Redo: (273) [user] mfix_vars1(1704, _390622)
^  Unify: (273) [user] mfix_vars1(1704, _390622)
^  Call: (274) [user] symbol(1704)
^  Unify: (274) [user] symbol(1704)
   Call: (275) [system] atom(1704)
   Fail: (275) [system] atom(1704)
^  Fail: (274) [user] symbol(1704)
^  Redo: (273) [user] mfix_vars1(1704, _390622)
   Call: (274) [system] 1704=_390622
   Exit: (274) [system] 1704=1704
^  Exit: (273) [user] mfix_vars1(1704, 1704)
   Call: (273) [apply] apply:maplist_([0], _390624, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_424948|_424950], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _424948)
^  Unify: (274) [user] mfix_vars1(0, _424948)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _424948)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_429594))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _424948)
^  Unify: (274) [user] mfix_vars1(0, _424948)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _424948)
^  Unify: (274) [user] mfix_vars1(0, _424948)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _424948)
^  Unify: (274) [user] mfix_vars1(0, _424948)
   Call: (275) [system] 0==[_438874, _438880]
^  Redo: (274) [user] mfix_vars1(0, _424948)
^  Unify: (274) [user] mfix_vars1(0, _424948)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _424948)
^  Unify: (274) [user] mfix_vars1(0, _424948)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _424948)
^  Unify: (274) [user] mfix_vars1(0, _424948)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _424948)
^  Unify: (274) [user] mfix_vars1(0, _424948)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _424948)
   Call: (275) [system] 0=_424948
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _424950, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1704, 0], [1704, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1704, 0], [";;", 1704, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1704, 0], [";;", 1704, 0])
   Call: (270) [system] compound_name_arguments(_319122, '$COMMENT', [";;", 1704, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1704, 0), '$COMMENT', [";;", 1704, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1704, 0)\=@='$COMMENT'(";;", 1704, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1704, 0), _313536)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1704, 0), _475122))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1704, 0), _475122))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1704, 0), _475122))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1704, 0), _475122))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1704, 0), _475122)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1704, 0), _475122)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1704, 0), _480708))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1704, 0), _480708))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1704, 0), _480708)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1704, 0), _480708)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1704, 0), _480708)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1704, 0)\=@='$COMMENT'(";;", 1704, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1704, 0), _475122)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1704, 0), _307924))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1704, 0), _307924))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1704, 0), _307924))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1704, 0), _307924))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1704, 0), _307924)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1704, 0), _307924)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1704, 0), _503028))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1704, 0), _503028))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1704, 0), _503028)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1704, 0), _503028)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1704, 0), _503028)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1704, 0)\=@='$COMMENT'(";;", 1704, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1704, 0), _307924)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1704, 0)\=@='$COMMENT'(";;", 1704, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1704, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1704, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1704, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1704, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1704, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1704, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1704, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1704, 0), _13858, [], _13860)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1704, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1704, 0), _13858, [], _13860)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1704, 0), _13858, [], _13860)
   Call: (258) [system] atom('$COMMENT'(";;", 1704, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1704, 0), _13858, [], _13860)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1704, 0), _13858, [], _13860)
   Call: (258) [system] compound('$COMMENT'(";;", 1704, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1704, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1704, 0), _23174, _23176)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1704, 0), '$COMMENT', [";;", 1704, 0])
^  Call: (258) [user] subst_vars([";;", 1704, 0], _25060, [], _13860)
^  Unify: (258) [user] subst_vars([";;", 1704, 0], [";;", 1704, 0], [], [])
   Call: (259) [system] var([";;", 1704, 0])
^  Redo: (258) [user] subst_vars([";;", 1704, 0], _25060, [], _13860)
^  Unify: (258) [user] subst_vars([";;", 1704, 0], [_28796|_28798], [], _13860)
^  Call: (259) [user] subst_vars(";;", _28796, [], _29736)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _28796, [], _29736)
^  Unify: (259) [user] subst_vars(";;", _28796, [], _29736)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _28796, [], _29736)
^  Unify: (259) [user] subst_vars(";;", _28796, [], _29736)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _28796, [], _29736)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1704, 0], _28798, [], _13860)
^  Unify: (259) [user] subst_vars([1704, 0], [1704, 0], [], [])
   Call: (260) [system] var([1704, 0])
^  Redo: (259) [user] subst_vars([1704, 0], _28798, [], _13860)
^  Unify: (259) [user] subst_vars([1704, 0], [_44668|_44670], [], _13860)
^  Call: (260) [user] subst_vars(1704, _44668, [], _45608)
^  Unify: (260) [user] subst_vars(1704, 1704, [], [])
   Call: (261) [system] var(1704)
^  Redo: (260) [user] subst_vars(1704, _44668, [], _45608)
^  Unify: (260) [user] subst_vars(1704, _44668, [], _45608)
   Call: (261) [system] atom(1704)
^  Redo: (260) [user] subst_vars(1704, _44668, [], _45608)
^  Unify: (260) [user] subst_vars(1704, _44668, [], _45608)
   Call: (261) [system] compound(1704)
^  Redo: (260) [user] subst_vars(1704, _44668, [], _45608)
^  Unify: (260) [user] subst_vars(1704, 1704, [], [])
^  Exit: (260) [user] subst_vars(1704, 1704, [], [])
^  Call: (260) [user] subst_vars([0], _44670, [], _13860)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _44670, [], _13860)
^  Unify: (260) [user] subst_vars([0], [_60540|_60542], [], _13860)
^  Call: (261) [user] subst_vars(0, _60540, [], _61480)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _60540, [], _61480)
^  Unify: (261) [user] subst_vars(0, _60540, [], _61480)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _60540, [], _61480)
^  Unify: (261) [user] subst_vars(0, _60540, [], _61480)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _60540, [], _61480)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _60542, [], _13860)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _60542, [], _13860)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1704, 0], [1704, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1704, 0], [";;", 1704, 0], [], [])
   Call: (258) [system] compound_name_arguments(_13858, '$COMMENT', [";;", 1704, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1704, 0), '$COMMENT', [";;", 1704, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1704, 0), '$COMMENT'(";;", 1704, 0), [], [])
   Call: (257) [system] _83898=metta_file_buffer(+, '$COMMENT'(";;", 1704, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1704, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1704, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1704, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1704, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1704, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1704, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1704, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1704, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1705, 0, 60880, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$stream_position'(60880, 1705, 0, 60914)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _136624))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _136624))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _136624)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _136624)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _136624)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _136624)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _142236))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _142236))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _142236))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _142236))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _142236)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _142236)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _147822))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _147822))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _147822)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _147822)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _147822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _147822)
   Call: (270) [system] var('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _147822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$VAR'(_155282))
   Call: (270) [system] atom('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _147822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _147822)
   Call: (270) [system] '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _147822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _147822)
   Call: (270) [system] '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _147822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _147822)
   Call: (270) [system] '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0)==[_164562, _164568]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _147822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _147822)
   Call: (270) [system] is_list('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _147822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _147822)
   Call: (270) [system] string('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _147822)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _147822)
   Call: (270) [system] compound('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _174764, _174766)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT', [";;         !(get-doc (some-func arg1 arg2))", 1705, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         !(get-doc (some-func arg1 arg2))", 1705, 0], _178506)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(get-doc (some-func arg1 arg2))", 1705, 0], _178506)
   Call: (271) [apply] apply:maplist_([";;         !(get-doc (some-func arg1 arg2))", 1705, 0], _178506, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         !(get-doc (some-func arg1 arg2))", 1705, 0], [_181324|_181326], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         !(get-doc (some-func arg1 arg2))", _181324)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc (some-func arg1 arg2))", _181324)
   Call: (273) [system] var(";;         !(get-doc (some-func arg1 arg2))")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc (some-func arg1 arg2))", _181324)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc (some-func arg1 arg2))", '$VAR'(_185970))
   Call: (273) [system] atom(";;         !(get-doc (some-func arg1 arg2))")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc (some-func arg1 arg2))", _181324)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc (some-func arg1 arg2))", _181324)
   Call: (273) [system] ";;         !(get-doc (some-func arg1 arg2))"==true
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc (some-func arg1 arg2))", _181324)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc (some-func arg1 arg2))", _181324)
   Call: (273) [system] ";;         !(get-doc (some-func arg1 arg2))"==false
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc (some-func arg1 arg2))", _181324)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc (some-func arg1 arg2))", _181324)
   Call: (273) [system] ";;         !(get-doc (some-func arg1 arg2))"==[_195250, _195256]
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc (some-func arg1 arg2))", _181324)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc (some-func arg1 arg2))", _181324)
   Call: (273) [system] is_list(";;         !(get-doc (some-func arg1 arg2))")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc (some-func arg1 arg2))", _181324)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc (some-func arg1 arg2))", _181324)
   Call: (273) [system] string(";;         !(get-doc (some-func arg1 arg2))")
   Exit: (273) [system] string(";;         !(get-doc (some-func arg1 arg2))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc (some-func arg1 arg2))", _181324)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc (some-func arg1 arg2))", _181324)
   Call: (273) [system] compound(";;         !(get-doc (some-func arg1 arg2))")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc (some-func arg1 arg2))", _181324)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc (some-func arg1 arg2))", _181324)
^  Call: (273) [user] symbol(";;         !(get-doc (some-func arg1 arg2))")
^  Unify: (273) [user] symbol(";;         !(get-doc (some-func arg1 arg2))")
   Call: (274) [system] atom(";;         !(get-doc (some-func arg1 arg2))")
   Fail: (274) [system] atom(";;         !(get-doc (some-func arg1 arg2))")
^  Fail: (273) [user] symbol(";;         !(get-doc (some-func arg1 arg2))")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc (some-func arg1 arg2))", _181324)
   Call: (273) [system] ";;         !(get-doc (some-func arg1 arg2))"=_181324
   Exit: (273) [system] ";;         !(get-doc (some-func arg1 arg2))"=";;         !(get-doc (some-func arg1 arg2))"
^  Exit: (272) [user] mfix_vars1(";;         !(get-doc (some-func arg1 arg2))", ";;         !(get-doc (some-func arg1 arg2))")
   Call: (272) [apply] apply:maplist_([1705, 0], _181326, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1705, 0], [_219322|_219324], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1705, _219322)
^  Unify: (273) [user] mfix_vars1(1705, _219322)
   Call: (274) [system] var(1705)
^  Redo: (273) [user] mfix_vars1(1705, _219322)
^  Unify: (273) [user] mfix_vars1(1705, '$VAR'(_223968))
   Call: (274) [system] atom(1705)
^  Redo: (273) [user] mfix_vars1(1705, _219322)
^  Unify: (273) [user] mfix_vars1(1705, _219322)
   Call: (274) [system] 1705==true
^  Redo: (273) [user] mfix_vars1(1705, _219322)
^  Unify: (273) [user] mfix_vars1(1705, _219322)
   Call: (274) [system] 1705==false
^  Redo: (273) [user] mfix_vars1(1705, _219322)
^  Unify: (273) [user] mfix_vars1(1705, _219322)
   Call: (274) [system] 1705==[_233248, _233254]
^  Redo: (273) [user] mfix_vars1(1705, _219322)
^  Unify: (273) [user] mfix_vars1(1705, _219322)
   Call: (274) [system] is_list(1705)
^  Redo: (273) [user] mfix_vars1(1705, _219322)
^  Unify: (273) [user] mfix_vars1(1705, _219322)
   Call: (274) [system] string(1705)
^  Redo: (273) [user] mfix_vars1(1705, _219322)
^  Unify: (273) [user] mfix_vars1(1705, _219322)
   Call: (274) [system] compound(1705)
^  Redo: (273) [user] mfix_vars1(1705, _219322)
^  Unify: (273) [user] mfix_vars1(1705, _219322)
^  Call: (274) [user] symbol(1705)
^  Unify: (274) [user] symbol(1705)
   Call: (275) [system] atom(1705)
   Fail: (275) [system] atom(1705)
^  Fail: (274) [user] symbol(1705)
^  Redo: (273) [user] mfix_vars1(1705, _219322)
   Call: (274) [system] 1705=_219322
   Exit: (274) [system] 1705=1705
^  Exit: (273) [user] mfix_vars1(1705, 1705)
   Call: (273) [apply] apply:maplist_([0], _219324, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_253648|_253650], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _253648)
^  Unify: (274) [user] mfix_vars1(0, _253648)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _253648)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_258294))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _253648)
^  Unify: (274) [user] mfix_vars1(0, _253648)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _253648)
^  Unify: (274) [user] mfix_vars1(0, _253648)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _253648)
^  Unify: (274) [user] mfix_vars1(0, _253648)
   Call: (275) [system] 0==[_267574, _267580]
^  Redo: (274) [user] mfix_vars1(0, _253648)
^  Unify: (274) [user] mfix_vars1(0, _253648)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _253648)
^  Unify: (274) [user] mfix_vars1(0, _253648)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _253648)
^  Unify: (274) [user] mfix_vars1(0, _253648)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _253648)
^  Unify: (274) [user] mfix_vars1(0, _253648)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _253648)
   Call: (275) [system] 0=_253648
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _253650, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1705, 0], [1705, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         !(get-doc (some-func arg1 arg2))", 1705, 0], [";;         !(get-doc (some-func arg1 arg2))", 1705, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(get-doc (some-func arg1 arg2))", 1705, 0], [";;         !(get-doc (some-func arg1 arg2))", 1705, 0])
   Call: (270) [system] compound_name_arguments(_147822, '$COMMENT', [";;         !(get-doc (some-func arg1 arg2))", 1705, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT', [";;         !(get-doc (some-func arg1 arg2))", 1705, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0)\=@='$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _142236)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _303822))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _303822))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _303822))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _303822))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _303822)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _303822)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _309408))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _309408))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _309408)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _309408)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _309408)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0)\=@='$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _303822)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _136624))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _136624))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _136624))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _136624))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _136624)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _136624)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _331728))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _331728))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _331728)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _331728)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _331728)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0)\=@='$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _136624)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0)))
   Call: (261) [system] '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0)\=@='$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _360506, [], _360508)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _360506, [], _360508)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _360506, [], _360508)
   Call: (258) [system] atom('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _360506, [], _360508)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _360506, [], _360508)
   Call: (258) [system] compound('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), _369822, _369824)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT', [";;         !(get-doc (some-func arg1 arg2))", 1705, 0])
^  Call: (258) [user] subst_vars([";;         !(get-doc (some-func arg1 arg2))", 1705, 0], _371708, [], _360508)
^  Unify: (258) [user] subst_vars([";;         !(get-doc (some-func arg1 arg2))", 1705, 0], [";;         !(get-doc (some-func arg1 arg2))", 1705, 0], [], [])
   Call: (259) [system] var([";;         !(get-doc (some-func arg1 arg2))", 1705, 0])
^  Redo: (258) [user] subst_vars([";;         !(get-doc (some-func arg1 arg2))", 1705, 0], _371708, [], _360508)
^  Unify: (258) [user] subst_vars([";;         !(get-doc (some-func arg1 arg2))", 1705, 0], [_375444|_375446], [], _360508)
^  Call: (259) [user] subst_vars(";;         !(get-doc (some-func arg1 arg2))", _375444, [], _376384)
^  Unify: (259) [user] subst_vars(";;         !(get-doc (some-func arg1 arg2))", ";;         !(get-doc (some-func arg1 arg2))", [], [])
   Call: (260) [system] var(";;         !(get-doc (some-func arg1 arg2))")
^  Redo: (259) [user] subst_vars(";;         !(get-doc (some-func arg1 arg2))", _375444, [], _376384)
^  Unify: (259) [user] subst_vars(";;         !(get-doc (some-func arg1 arg2))", _375444, [], _376384)
   Call: (260) [system] atom(";;         !(get-doc (some-func arg1 arg2))")
^  Redo: (259) [user] subst_vars(";;         !(get-doc (some-func arg1 arg2))", _375444, [], _376384)
^  Unify: (259) [user] subst_vars(";;         !(get-doc (some-func arg1 arg2))", _375444, [], _376384)
   Call: (260) [system] compound(";;         !(get-doc (some-func arg1 arg2))")
^  Redo: (259) [user] subst_vars(";;         !(get-doc (some-func arg1 arg2))", _375444, [], _376384)
^  Unify: (259) [user] subst_vars(";;         !(get-doc (some-func arg1 arg2))", ";;         !(get-doc (some-func arg1 arg2))", [], [])
^  Exit: (259) [user] subst_vars(";;         !(get-doc (some-func arg1 arg2))", ";;         !(get-doc (some-func arg1 arg2))", [], [])
^  Call: (259) [user] subst_vars([1705, 0], _375446, [], _360508)
^  Unify: (259) [user] subst_vars([1705, 0], [1705, 0], [], [])
   Call: (260) [system] var([1705, 0])
^  Redo: (259) [user] subst_vars([1705, 0], _375446, [], _360508)
^  Unify: (259) [user] subst_vars([1705, 0], [_391316|_391318], [], _360508)
^  Call: (260) [user] subst_vars(1705, _391316, [], _392256)
^  Unify: (260) [user] subst_vars(1705, 1705, [], [])
   Call: (261) [system] var(1705)
^  Redo: (260) [user] subst_vars(1705, _391316, [], _392256)
^  Unify: (260) [user] subst_vars(1705, _391316, [], _392256)
   Call: (261) [system] atom(1705)
^  Redo: (260) [user] subst_vars(1705, _391316, [], _392256)
^  Unify: (260) [user] subst_vars(1705, _391316, [], _392256)
   Call: (261) [system] compound(1705)
^  Redo: (260) [user] subst_vars(1705, _391316, [], _392256)
^  Unify: (260) [user] subst_vars(1705, 1705, [], [])
^  Exit: (260) [user] subst_vars(1705, 1705, [], [])
^  Call: (260) [user] subst_vars([0], _391318, [], _360508)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _391318, [], _360508)
^  Unify: (260) [user] subst_vars([0], [_407188|_407190], [], _360508)
^  Call: (261) [user] subst_vars(0, _407188, [], _408128)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _407188, [], _408128)
^  Unify: (261) [user] subst_vars(0, _407188, [], _408128)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _407188, [], _408128)
^  Unify: (261) [user] subst_vars(0, _407188, [], _408128)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _407188, [], _408128)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _407190, [], _360508)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _407190, [], _360508)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1705, 0], [1705, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         !(get-doc (some-func arg1 arg2))", 1705, 0], [";;         !(get-doc (some-func arg1 arg2))", 1705, 0], [], [])
   Call: (258) [system] compound_name_arguments(_360506, '$COMMENT', [";;         !(get-doc (some-func arg1 arg2))", 1705, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT', [";;         !(get-doc (some-func arg1 arg2))", 1705, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), [], [])
   Call: (257) [system] _430546=metta_file_buffer(+, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc (some-func arg1 arg2))", 1705, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1706, 0, 60924, '$COMMENT'(";;     \"#);", 1706, 0), '$stream_position'(60924, 1706, 0, 60958)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1706, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1706, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1706, 0), _483264))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1706, 0), _483264))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1706, 0), _483264)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     \"#);", 1706, 0), _483264)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     \"#);", 1706, 0), _483264)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     \"#);", 1706, 0), _483264)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1706, 0), _488876))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1706, 0), _488876))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1706, 0), _488876))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1706, 0), _488876))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1706, 0), _488876)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1706, 0), _488876)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     \"#);", 1706, 0), _494462))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     \"#);", 1706, 0), _494462))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     \"#);", 1706, 0), _494462)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     \"#);", 1706, 0), _494462)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1706, 0), _494462)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1706, 0), _494462)
   Call: (270) [system] var('$COMMENT'(";;     \"#);", 1706, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1706, 0), _494462)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1706, 0), '$VAR'(_501922))
   Call: (270) [system] atom('$COMMENT'(";;     \"#);", 1706, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1706, 0), _494462)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1706, 0), _494462)
   Call: (270) [system] '$COMMENT'(";;     \"#);", 1706, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1706, 0), _494462)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1706, 0), _494462)
   Call: (270) [system] '$COMMENT'(";;     \"#);", 1706, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1706, 0), _494462)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1706, 0), _494462)
   Call: (270) [system] '$COMMENT'(";;     \"#);", 1706, 0)==[_511202, _511208]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1706, 0), _494462)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1706, 0), _494462)
   Call: (270) [system] is_list('$COMMENT'(";;     \"#);", 1706, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1706, 0), _494462)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1706, 0), _494462)
   Call: (270) [system] string('$COMMENT'(";;     \"#);", 1706, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1706, 0), _494462)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1706, 0), _494462)
   Call: (270) [system] compound('$COMMENT'(";;     \"#);", 1706, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     \"#);", 1706, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1706, 0), _521404, _521406)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT', [";;     \"#);", 1706, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     \"#);", 1706, 0], _7294)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     \"#);", 1706, 0], _7294)
   Call: (271) [apply] apply:maplist_([";;     \"#);", 1706, 0], _7294, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     \"#);", 1706, 0], [_10112|_10114], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     \"#);", _10112)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _10112)
   Call: (273) [system] var(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _10112)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", '$VAR'(_14758))
   Call: (273) [system] atom(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _10112)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _10112)
   Call: (273) [system] ";;     \"#);"==true
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _10112)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _10112)
   Call: (273) [system] ";;     \"#);"==false
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _10112)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _10112)
   Call: (273) [system] ";;     \"#);"==[_24038, _24044]
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _10112)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _10112)
   Call: (273) [system] is_list(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _10112)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _10112)
   Call: (273) [system] string(";;     \"#);")
   Exit: (273) [system] string(";;     \"#);")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _10112)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _10112)
   Call: (273) [system] compound(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _10112)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _10112)
^  Call: (273) [user] symbol(";;     \"#);")
^  Unify: (273) [user] symbol(";;     \"#);")
   Call: (274) [system] atom(";;     \"#);")
   Fail: (274) [system] atom(";;     \"#);")
^  Fail: (273) [user] symbol(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _10112)
   Call: (273) [system] ";;     \"#);"=_10112
   Exit: (273) [system] ";;     \"#);"=";;     \"#);"
^  Exit: (272) [user] mfix_vars1(";;     \"#);", ";;     \"#);")
   Call: (272) [apply] apply:maplist_([1706, 0], _10114, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1706, 0], [_48110|_48112], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1706, _48110)
^  Unify: (273) [user] mfix_vars1(1706, _48110)
   Call: (274) [system] var(1706)
^  Redo: (273) [user] mfix_vars1(1706, _48110)
^  Unify: (273) [user] mfix_vars1(1706, '$VAR'(_52756))
   Call: (274) [system] atom(1706)
^  Redo: (273) [user] mfix_vars1(1706, _48110)
^  Unify: (273) [user] mfix_vars1(1706, _48110)
   Call: (274) [system] 1706==true
^  Redo: (273) [user] mfix_vars1(1706, _48110)
^  Unify: (273) [user] mfix_vars1(1706, _48110)
   Call: (274) [system] 1706==false
^  Redo: (273) [user] mfix_vars1(1706, _48110)
^  Unify: (273) [user] mfix_vars1(1706, _48110)
   Call: (274) [system] 1706==[_62036, _62042]
^  Redo: (273) [user] mfix_vars1(1706, _48110)
^  Unify: (273) [user] mfix_vars1(1706, _48110)
   Call: (274) [system] is_list(1706)
^  Redo: (273) [user] mfix_vars1(1706, _48110)
^  Unify: (273) [user] mfix_vars1(1706, _48110)
   Call: (274) [system] string(1706)
^  Redo: (273) [user] mfix_vars1(1706, _48110)
^  Unify: (273) [user] mfix_vars1(1706, _48110)
   Call: (274) [system] compound(1706)
^  Redo: (273) [user] mfix_vars1(1706, _48110)
^  Unify: (273) [user] mfix_vars1(1706, _48110)
^  Call: (274) [user] symbol(1706)
^  Unify: (274) [user] symbol(1706)
   Call: (275) [system] atom(1706)
   Fail: (275) [system] atom(1706)
^  Fail: (274) [user] symbol(1706)
^  Redo: (273) [user] mfix_vars1(1706, _48110)
   Call: (274) [system] 1706=_48110
   Exit: (274) [system] 1706=1706
^  Exit: (273) [user] mfix_vars1(1706, 1706)
   Call: (273) [apply] apply:maplist_([0], _48112, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_82436|_82438], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _82436)
^  Unify: (274) [user] mfix_vars1(0, _82436)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _82436)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_87082))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _82436)
^  Unify: (274) [user] mfix_vars1(0, _82436)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _82436)
^  Unify: (274) [user] mfix_vars1(0, _82436)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _82436)
^  Unify: (274) [user] mfix_vars1(0, _82436)
   Call: (275) [system] 0==[_96362, _96368]
^  Redo: (274) [user] mfix_vars1(0, _82436)
^  Unify: (274) [user] mfix_vars1(0, _82436)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _82436)
^  Unify: (274) [user] mfix_vars1(0, _82436)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _82436)
^  Unify: (274) [user] mfix_vars1(0, _82436)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _82436)
^  Unify: (274) [user] mfix_vars1(0, _82436)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _82436)
   Call: (275) [system] 0=_82436
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _82438, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1706, 0], [1706, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     \"#);", 1706, 0], [";;     \"#);", 1706, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     \"#);", 1706, 0], [";;     \"#);", 1706, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";;     \"#);", 1706, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT', [";;     \"#);", 1706, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0)))
   Call: (267) [system] '$COMMENT'(";;     \"#);", 1706, 0)\=@='$COMMENT'(";;     \"#);", 1706, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1706, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     \"#);", 1706, 0), _132610))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1706, 0), _132610))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1706, 0), _132610))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1706, 0), _132610))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1706, 0), _132610)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1706, 0), _132610)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     \"#);", 1706, 0), _138196))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     \"#);", 1706, 0), _138196))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     \"#);", 1706, 0), _138196)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     \"#);", 1706, 0), _138196)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     \"#);", 1706, 0), _138196)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0)))
   Call: (267) [system] '$COMMENT'(";;     \"#);", 1706, 0)\=@='$COMMENT'(";;     \"#);", 1706, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1706, 0), _132610)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     \"#);", 1706, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1706, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1706, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1706, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1706, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1706, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     \"#);", 1706, 0), _160516))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     \"#);", 1706, 0), _160516))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     \"#);", 1706, 0), _160516)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     \"#);", 1706, 0), _160516)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     \"#);", 1706, 0), _160516)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0)))
   Call: (267) [system] '$COMMENT'(";;     \"#);", 1706, 0)\=@='$COMMENT'(";;     \"#);", 1706, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1706, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0)))
   Call: (261) [system] '$COMMENT'(";;     \"#);", 1706, 0)\=@='$COMMENT'(";;     \"#);", 1706, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1706, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1706, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1706, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1706, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1706, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1706, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1706, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1706, 0), _189294, [], _189296)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     \"#);", 1706, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1706, 0), _189294, [], _189296)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1706, 0), _189294, [], _189296)
   Call: (258) [system] atom('$COMMENT'(";;     \"#);", 1706, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1706, 0), _189294, [], _189296)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1706, 0), _189294, [], _189296)
   Call: (258) [system] compound('$COMMENT'(";;     \"#);", 1706, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     \"#);", 1706, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1706, 0), _198610, _198612)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT', [";;     \"#);", 1706, 0])
^  Call: (258) [user] subst_vars([";;     \"#);", 1706, 0], _200496, [], _189296)
^  Unify: (258) [user] subst_vars([";;     \"#);", 1706, 0], [";;     \"#);", 1706, 0], [], [])
   Call: (259) [system] var([";;     \"#);", 1706, 0])
^  Redo: (258) [user] subst_vars([";;     \"#);", 1706, 0], _200496, [], _189296)
^  Unify: (258) [user] subst_vars([";;     \"#);", 1706, 0], [_204232|_204234], [], _189296)
^  Call: (259) [user] subst_vars(";;     \"#);", _204232, [], _205172)
^  Unify: (259) [user] subst_vars(";;     \"#);", ";;     \"#);", [], [])
   Call: (260) [system] var(";;     \"#);")
^  Redo: (259) [user] subst_vars(";;     \"#);", _204232, [], _205172)
^  Unify: (259) [user] subst_vars(";;     \"#);", _204232, [], _205172)
   Call: (260) [system] atom(";;     \"#);")
^  Redo: (259) [user] subst_vars(";;     \"#);", _204232, [], _205172)
^  Unify: (259) [user] subst_vars(";;     \"#);", _204232, [], _205172)
   Call: (260) [system] compound(";;     \"#);")
^  Redo: (259) [user] subst_vars(";;     \"#);", _204232, [], _205172)
^  Unify: (259) [user] subst_vars(";;     \"#);", ";;     \"#);", [], [])
^  Exit: (259) [user] subst_vars(";;     \"#);", ";;     \"#);", [], [])
^  Call: (259) [user] subst_vars([1706, 0], _204234, [], _189296)
^  Unify: (259) [user] subst_vars([1706, 0], [1706, 0], [], [])
   Call: (260) [system] var([1706, 0])
^  Redo: (259) [user] subst_vars([1706, 0], _204234, [], _189296)
^  Unify: (259) [user] subst_vars([1706, 0], [_220104|_220106], [], _189296)
^  Call: (260) [user] subst_vars(1706, _220104, [], _221044)
^  Unify: (260) [user] subst_vars(1706, 1706, [], [])
   Call: (261) [system] var(1706)
^  Redo: (260) [user] subst_vars(1706, _220104, [], _221044)
^  Unify: (260) [user] subst_vars(1706, _220104, [], _221044)
   Call: (261) [system] atom(1706)
^  Redo: (260) [user] subst_vars(1706, _220104, [], _221044)
^  Unify: (260) [user] subst_vars(1706, _220104, [], _221044)
   Call: (261) [system] compound(1706)
^  Redo: (260) [user] subst_vars(1706, _220104, [], _221044)
^  Unify: (260) [user] subst_vars(1706, 1706, [], [])
^  Exit: (260) [user] subst_vars(1706, 1706, [], [])
^  Call: (260) [user] subst_vars([0], _220106, [], _189296)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _220106, [], _189296)
^  Unify: (260) [user] subst_vars([0], [_235976|_235978], [], _189296)
^  Call: (261) [user] subst_vars(0, _235976, [], _236916)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _235976, [], _236916)
^  Unify: (261) [user] subst_vars(0, _235976, [], _236916)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _235976, [], _236916)
^  Unify: (261) [user] subst_vars(0, _235976, [], _236916)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _235976, [], _236916)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _235978, [], _189296)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _235978, [], _189296)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1706, 0], [1706, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     \"#);", 1706, 0], [";;     \"#);", 1706, 0], [], [])
   Call: (258) [system] compound_name_arguments(_189294, '$COMMENT', [";;     \"#);", 1706, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT', [";;     \"#);", 1706, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1706, 0), '$COMMENT'(";;     \"#);", 1706, 0), [], [])
   Call: (257) [system] _259334=metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1706, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1706, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1706, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1706, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1706, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1706, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1706, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1706, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1706, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1707, 0, 60936, '$COMMENT'(";;", 1707, 0), '$stream_position'(60936, 1707, 0, 60970)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1707, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1707, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1707, 0), _312050))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1707, 0), _312050))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1707, 0), _312050)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1707, 0), _312050)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1707, 0), _312050)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1707, 0), _312050)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1707, 0), _317662))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1707, 0), _317662))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1707, 0), _317662))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1707, 0), _317662))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1707, 0), _317662)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1707, 0), _317662)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1707, 0), _323248))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1707, 0), _323248))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1707, 0), _323248)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1707, 0), _323248)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1707, 0), _323248)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1707, 0), _323248)
   Call: (270) [system] var('$COMMENT'(";;", 1707, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1707, 0), _323248)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1707, 0), '$VAR'(_330708))
   Call: (270) [system] atom('$COMMENT'(";;", 1707, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1707, 0), _323248)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1707, 0), _323248)
   Call: (270) [system] '$COMMENT'(";;", 1707, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1707, 0), _323248)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1707, 0), _323248)
   Call: (270) [system] '$COMMENT'(";;", 1707, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1707, 0), _323248)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1707, 0), _323248)
   Call: (270) [system] '$COMMENT'(";;", 1707, 0)==[_339988, _339994]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1707, 0), _323248)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1707, 0), _323248)
   Call: (270) [system] is_list('$COMMENT'(";;", 1707, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1707, 0), _323248)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1707, 0), _323248)
   Call: (270) [system] string('$COMMENT'(";;", 1707, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1707, 0), _323248)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1707, 0), _323248)
   Call: (270) [system] compound('$COMMENT'(";;", 1707, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1707, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1707, 0), _350190, _350192)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1707, 0), '$COMMENT', [";;", 1707, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1707, 0], _353932)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1707, 0], _353932)
   Call: (271) [apply] apply:maplist_([";;", 1707, 0], _353932, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1707, 0], [_356750|_356752], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _356750)
^  Unify: (272) [user] mfix_vars1(";;", _356750)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _356750)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_361396))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _356750)
^  Unify: (272) [user] mfix_vars1(";;", _356750)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _356750)
^  Unify: (272) [user] mfix_vars1(";;", _356750)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _356750)
^  Unify: (272) [user] mfix_vars1(";;", _356750)
   Call: (273) [system] ";;"==[_370676, _370682]
^  Redo: (272) [user] mfix_vars1(";;", _356750)
^  Unify: (272) [user] mfix_vars1(";;", _356750)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _356750)
^  Unify: (272) [user] mfix_vars1(";;", _356750)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _356750)
^  Unify: (272) [user] mfix_vars1(";;", _356750)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _356750)
^  Unify: (272) [user] mfix_vars1(";;", _356750)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _356750)
   Call: (273) [system] ";;"=_356750
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1707, 0], _356752, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1707, 0], [_394748|_394750], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1707, _394748)
^  Unify: (273) [user] mfix_vars1(1707, _394748)
   Call: (274) [system] var(1707)
^  Redo: (273) [user] mfix_vars1(1707, _394748)
^  Unify: (273) [user] mfix_vars1(1707, '$VAR'(_399394))
   Call: (274) [system] atom(1707)
^  Redo: (273) [user] mfix_vars1(1707, _394748)
^  Unify: (273) [user] mfix_vars1(1707, _394748)
   Call: (274) [system] 1707==true
^  Redo: (273) [user] mfix_vars1(1707, _394748)
^  Unify: (273) [user] mfix_vars1(1707, _394748)
   Call: (274) [system] 1707==false
^  Redo: (273) [user] mfix_vars1(1707, _394748)
^  Unify: (273) [user] mfix_vars1(1707, _394748)
   Call: (274) [system] 1707==[_408674, _408680]
^  Redo: (273) [user] mfix_vars1(1707, _394748)
^  Unify: (273) [user] mfix_vars1(1707, _394748)
   Call: (274) [system] is_list(1707)
^  Redo: (273) [user] mfix_vars1(1707, _394748)
^  Unify: (273) [user] mfix_vars1(1707, _394748)
   Call: (274) [system] string(1707)
^  Redo: (273) [user] mfix_vars1(1707, _394748)
^  Unify: (273) [user] mfix_vars1(1707, _394748)
   Call: (274) [system] compound(1707)
^  Redo: (273) [user] mfix_vars1(1707, _394748)
^  Unify: (273) [user] mfix_vars1(1707, _394748)
^  Call: (274) [user] symbol(1707)
^  Unify: (274) [user] symbol(1707)
   Call: (275) [system] atom(1707)
   Fail: (275) [system] atom(1707)
^  Fail: (274) [user] symbol(1707)
^  Redo: (273) [user] mfix_vars1(1707, _394748)
   Call: (274) [system] 1707=_394748
   Exit: (274) [system] 1707=1707
^  Exit: (273) [user] mfix_vars1(1707, 1707)
   Call: (273) [apply] apply:maplist_([0], _394750, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_429074|_429076], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _429074)
^  Unify: (274) [user] mfix_vars1(0, _429074)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _429074)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_433720))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _429074)
^  Unify: (274) [user] mfix_vars1(0, _429074)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _429074)
^  Unify: (274) [user] mfix_vars1(0, _429074)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _429074)
^  Unify: (274) [user] mfix_vars1(0, _429074)
   Call: (275) [system] 0==[_443000, _443006]
^  Redo: (274) [user] mfix_vars1(0, _429074)
^  Unify: (274) [user] mfix_vars1(0, _429074)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _429074)
^  Unify: (274) [user] mfix_vars1(0, _429074)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _429074)
^  Unify: (274) [user] mfix_vars1(0, _429074)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _429074)
^  Unify: (274) [user] mfix_vars1(0, _429074)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _429074)
   Call: (275) [system] 0=_429074
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _429076, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1707, 0], [1707, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1707, 0], [";;", 1707, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1707, 0], [";;", 1707, 0])
   Call: (270) [system] compound_name_arguments(_323248, '$COMMENT', [";;", 1707, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1707, 0), '$COMMENT', [";;", 1707, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1707, 0)\=@='$COMMENT'(";;", 1707, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1707, 0), _317662)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1707, 0), _479248))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1707, 0), _479248))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1707, 0), _479248))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1707, 0), _479248))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1707, 0), _479248)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1707, 0), _479248)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1707, 0), _484834))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1707, 0), _484834))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1707, 0), _484834)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1707, 0), _484834)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1707, 0), _484834)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1707, 0)\=@='$COMMENT'(";;", 1707, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1707, 0), _479248)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1707, 0), _312050))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1707, 0), _312050))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1707, 0), _312050))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1707, 0), _312050))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1707, 0), _312050)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1707, 0), _312050)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1707, 0), _507154))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1707, 0), _507154))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1707, 0), _507154)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1707, 0), _507154)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1707, 0), _507154)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1707, 0)\=@='$COMMENT'(";;", 1707, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1707, 0), _312050)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1707, 0)\=@='$COMMENT'(";;", 1707, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1707, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1707, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1707, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1707, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1707, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1707, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1707, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1707, 0), _17880, [], _17882)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1707, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1707, 0), _17880, [], _17882)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1707, 0), _17880, [], _17882)
   Call: (258) [system] atom('$COMMENT'(";;", 1707, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1707, 0), _17880, [], _17882)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1707, 0), _17880, [], _17882)
   Call: (258) [system] compound('$COMMENT'(";;", 1707, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1707, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1707, 0), _27196, _27198)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1707, 0), '$COMMENT', [";;", 1707, 0])
^  Call: (258) [user] subst_vars([";;", 1707, 0], _29082, [], _17882)
^  Unify: (258) [user] subst_vars([";;", 1707, 0], [";;", 1707, 0], [], [])
   Call: (259) [system] var([";;", 1707, 0])
^  Redo: (258) [user] subst_vars([";;", 1707, 0], _29082, [], _17882)
^  Unify: (258) [user] subst_vars([";;", 1707, 0], [_32818|_32820], [], _17882)
^  Call: (259) [user] subst_vars(";;", _32818, [], _33758)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _32818, [], _33758)
^  Unify: (259) [user] subst_vars(";;", _32818, [], _33758)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _32818, [], _33758)
^  Unify: (259) [user] subst_vars(";;", _32818, [], _33758)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _32818, [], _33758)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1707, 0], _32820, [], _17882)
^  Unify: (259) [user] subst_vars([1707, 0], [1707, 0], [], [])
   Call: (260) [system] var([1707, 0])
^  Redo: (259) [user] subst_vars([1707, 0], _32820, [], _17882)
^  Unify: (259) [user] subst_vars([1707, 0], [_48690|_48692], [], _17882)
^  Call: (260) [user] subst_vars(1707, _48690, [], _49630)
^  Unify: (260) [user] subst_vars(1707, 1707, [], [])
   Call: (261) [system] var(1707)
^  Redo: (260) [user] subst_vars(1707, _48690, [], _49630)
^  Unify: (260) [user] subst_vars(1707, _48690, [], _49630)
   Call: (261) [system] atom(1707)
^  Redo: (260) [user] subst_vars(1707, _48690, [], _49630)
^  Unify: (260) [user] subst_vars(1707, _48690, [], _49630)
   Call: (261) [system] compound(1707)
^  Redo: (260) [user] subst_vars(1707, _48690, [], _49630)
^  Unify: (260) [user] subst_vars(1707, 1707, [], [])
^  Exit: (260) [user] subst_vars(1707, 1707, [], [])
^  Call: (260) [user] subst_vars([0], _48692, [], _17882)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _48692, [], _17882)
^  Unify: (260) [user] subst_vars([0], [_64562|_64564], [], _17882)
^  Call: (261) [user] subst_vars(0, _64562, [], _65502)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _64562, [], _65502)
^  Unify: (261) [user] subst_vars(0, _64562, [], _65502)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _64562, [], _65502)
^  Unify: (261) [user] subst_vars(0, _64562, [], _65502)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _64562, [], _65502)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _64564, [], _17882)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _64564, [], _17882)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1707, 0], [1707, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1707, 0], [";;", 1707, 0], [], [])
   Call: (258) [system] compound_name_arguments(_17880, '$COMMENT', [";;", 1707, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1707, 0), '$COMMENT', [";;", 1707, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1707, 0), '$COMMENT'(";;", 1707, 0), [], [])
   Call: (257) [system] _87920=metta_file_buffer(+, '$COMMENT'(";;", 1707, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1707, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1707, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1707, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1707, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1707, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1707, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1707, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1707, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1708, 0, 60939, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$stream_position'(60939, 1708, 0, 60973)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _140650))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _140650))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _140650)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _140650)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _140650)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _140650)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _146262))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _146262))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _146262))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _146262))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _146262)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _146262)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _151848))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _151848))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _151848)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _151848)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _151848)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _151848)
   Call: (270) [system] var('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _151848)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$VAR'(_159308))
   Call: (270) [system] atom('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _151848)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _151848)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _151848)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _151848)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _151848)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _151848)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0)==[_168588, _168594]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _151848)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _151848)
   Call: (270) [system] is_list('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _151848)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _151848)
   Call: (270) [system] string('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _151848)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _151848)
   Call: (270) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _178790, _178792)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0], _182532)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0], _182532)
   Call: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0], _182532, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0], [_185350|_185352], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _185350)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _185350)
   Call: (273) [system] var(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _185350)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", '$VAR'(_189996))
   Call: (273) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _185350)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _185350)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["==true
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _185350)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _185350)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["==false
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _185350)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _185350)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["==[_199276, _199282]
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _185350)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _185350)
   Call: (273) [system] is_list(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _185350)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _185350)
   Call: (273) [system] string(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Exit: (273) [system] string(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _185350)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _185350)
   Call: (273) [system] compound(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _185350)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _185350)
^  Call: (273) [user] symbol(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Unify: (273) [user] symbol(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Call: (274) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Fail: (274) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Fail: (273) [user] symbol(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _185350)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["=_185350
   Exit: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["=";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["
^  Exit: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Call: (272) [apply] apply:maplist_([1708, 0], _185352, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1708, 0], [_223348|_223350], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1708, _223348)
^  Unify: (273) [user] mfix_vars1(1708, _223348)
   Call: (274) [system] var(1708)
^  Redo: (273) [user] mfix_vars1(1708, _223348)
^  Unify: (273) [user] mfix_vars1(1708, '$VAR'(_227994))
   Call: (274) [system] atom(1708)
^  Redo: (273) [user] mfix_vars1(1708, _223348)
^  Unify: (273) [user] mfix_vars1(1708, _223348)
   Call: (274) [system] 1708==true
^  Redo: (273) [user] mfix_vars1(1708, _223348)
^  Unify: (273) [user] mfix_vars1(1708, _223348)
   Call: (274) [system] 1708==false
^  Redo: (273) [user] mfix_vars1(1708, _223348)
^  Unify: (273) [user] mfix_vars1(1708, _223348)
   Call: (274) [system] 1708==[_237274, _237280]
^  Redo: (273) [user] mfix_vars1(1708, _223348)
^  Unify: (273) [user] mfix_vars1(1708, _223348)
   Call: (274) [system] is_list(1708)
^  Redo: (273) [user] mfix_vars1(1708, _223348)
^  Unify: (273) [user] mfix_vars1(1708, _223348)
   Call: (274) [system] string(1708)
^  Redo: (273) [user] mfix_vars1(1708, _223348)
^  Unify: (273) [user] mfix_vars1(1708, _223348)
   Call: (274) [system] compound(1708)
^  Redo: (273) [user] mfix_vars1(1708, _223348)
^  Unify: (273) [user] mfix_vars1(1708, _223348)
^  Call: (274) [user] symbol(1708)
^  Unify: (274) [user] symbol(1708)
   Call: (275) [system] atom(1708)
   Fail: (275) [system] atom(1708)
^  Fail: (274) [user] symbol(1708)
^  Redo: (273) [user] mfix_vars1(1708, _223348)
   Call: (274) [system] 1708=_223348
   Exit: (274) [system] 1708=1708
^  Exit: (273) [user] mfix_vars1(1708, 1708)
   Call: (273) [apply] apply:maplist_([0], _223350, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_257674|_257676], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _257674)
^  Unify: (274) [user] mfix_vars1(0, _257674)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _257674)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_262320))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _257674)
^  Unify: (274) [user] mfix_vars1(0, _257674)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _257674)
^  Unify: (274) [user] mfix_vars1(0, _257674)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _257674)
^  Unify: (274) [user] mfix_vars1(0, _257674)
   Call: (275) [system] 0==[_271600, _271606]
^  Redo: (274) [user] mfix_vars1(0, _257674)
^  Unify: (274) [user] mfix_vars1(0, _257674)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _257674)
^  Unify: (274) [user] mfix_vars1(0, _257674)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _257674)
^  Unify: (274) [user] mfix_vars1(0, _257674)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _257674)
^  Unify: (274) [user] mfix_vars1(0, _257674)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _257674)
   Call: (275) [system] 0=_257674
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _257676, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1708, 0], [1708, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0])
   Call: (270) [system] compound_name_arguments(_151848, '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _146262)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _307848))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _307848))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _307848))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _307848))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _307848)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _307848)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _313434))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _313434))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _313434)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _313434)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _313434)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _307848)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _140650))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _140650))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _140650))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _140650))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _140650)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _140650)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _335754))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _335754))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _335754)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _335754)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _335754)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _140650)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0)))
   Call: (261) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _364532, [], _364534)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _364532, [], _364534)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _364532, [], _364534)
   Call: (258) [system] atom('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _364532, [], _364534)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _364532, [], _364534)
   Call: (258) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), _373848, _373850)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0])
^  Call: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0], _375734, [], _364534)
^  Unify: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0], [], [])
   Call: (259) [system] var([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0])
^  Redo: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0], _375734, [], _364534)
^  Unify: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0], [_379470|_379472], [], _364534)
^  Call: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _379470, [], _380410)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", [], [])
   Call: (260) [system] var(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _379470, [], _380410)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _379470, [], _380410)
   Call: (260) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _379470, [], _380410)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _379470, [], _380410)
   Call: (260) [system] compound(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _379470, [], _380410)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", [], [])
^  Exit: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", [], [])
^  Call: (259) [user] subst_vars([1708, 0], _379472, [], _364534)
^  Unify: (259) [user] subst_vars([1708, 0], [1708, 0], [], [])
   Call: (260) [system] var([1708, 0])
^  Redo: (259) [user] subst_vars([1708, 0], _379472, [], _364534)
^  Unify: (259) [user] subst_vars([1708, 0], [_395342|_395344], [], _364534)
^  Call: (260) [user] subst_vars(1708, _395342, [], _396282)
^  Unify: (260) [user] subst_vars(1708, 1708, [], [])
   Call: (261) [system] var(1708)
^  Redo: (260) [user] subst_vars(1708, _395342, [], _396282)
^  Unify: (260) [user] subst_vars(1708, _395342, [], _396282)
   Call: (261) [system] atom(1708)
^  Redo: (260) [user] subst_vars(1708, _395342, [], _396282)
^  Unify: (260) [user] subst_vars(1708, _395342, [], _396282)
   Call: (261) [system] compound(1708)
^  Redo: (260) [user] subst_vars(1708, _395342, [], _396282)
^  Unify: (260) [user] subst_vars(1708, 1708, [], [])
^  Exit: (260) [user] subst_vars(1708, 1708, [], [])
^  Call: (260) [user] subst_vars([0], _395344, [], _364534)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _395344, [], _364534)
^  Unify: (260) [user] subst_vars([0], [_411214|_411216], [], _364534)
^  Call: (261) [user] subst_vars(0, _411214, [], _412154)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _411214, [], _412154)
^  Unify: (261) [user] subst_vars(0, _411214, [], _412154)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _411214, [], _412154)
^  Unify: (261) [user] subst_vars(0, _411214, [], _412154)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _411214, [], _412154)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _411216, [], _364534)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _411216, [], _364534)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1708, 0], [1708, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0], [], [])
   Call: (258) [system] compound_name_arguments(_364532, '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), [], [])
   Call: (257) [system] _434572=metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1708, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1709, 0, 60999, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$stream_position'(60999, 1709, 0, 61033)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _487296))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _487296))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _487296)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _487296)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _487296)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _487296)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _492908))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _492908))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _492908))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _492908))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _492908)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _492908)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _498494))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _498494))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _498494)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _498494)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _498494)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _498494)
   Call: (270) [system] var('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _498494)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$VAR'(_505954))
   Call: (270) [system] atom('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _498494)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _498494)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _498494)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _498494)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _498494)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _498494)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0)==[_515234, _515240]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _498494)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _498494)
   Call: (270) [system] is_list('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _498494)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _498494)
   Call: (270) [system] string('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _498494)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _498494)
   Call: (270) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _7518, _7520)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1709, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         vec![expr!(\"@doc-formal\"", 1709, 0], _11260)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         vec![expr!(\"@doc-formal\"", 1709, 0], _11260)
   Call: (271) [apply] apply:maplist_([";;         vec![expr!(\"@doc-formal\"", 1709, 0], _11260, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         vec![expr!(\"@doc-formal\"", 1709, 0], [_14078|_14080], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _14078)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _14078)
   Call: (273) [system] var(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _14078)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", '$VAR'(_18724))
   Call: (273) [system] atom(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _14078)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _14078)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""==true
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _14078)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _14078)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""==false
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _14078)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _14078)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""==[_28004, _28010]
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _14078)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _14078)
   Call: (273) [system] is_list(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _14078)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _14078)
   Call: (273) [system] string(";;         vec![expr!(\"@doc-formal\"")
   Exit: (273) [system] string(";;         vec![expr!(\"@doc-formal\"")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _14078)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _14078)
   Call: (273) [system] compound(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _14078)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _14078)
^  Call: (273) [user] symbol(";;         vec![expr!(\"@doc-formal\"")
^  Unify: (273) [user] symbol(";;         vec![expr!(\"@doc-formal\"")
   Call: (274) [system] atom(";;         vec![expr!(\"@doc-formal\"")
   Fail: (274) [system] atom(";;         vec![expr!(\"@doc-formal\"")
^  Fail: (273) [user] symbol(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _14078)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""=_14078
   Exit: (273) [system] ";;         vec![expr!(\"@doc-formal\""=";;         vec![expr!(\"@doc-formal\""
^  Exit: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"")
   Call: (272) [apply] apply:maplist_([1709, 0], _14080, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1709, 0], [_52076|_52078], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1709, _52076)
^  Unify: (273) [user] mfix_vars1(1709, _52076)
   Call: (274) [system] var(1709)
^  Redo: (273) [user] mfix_vars1(1709, _52076)
^  Unify: (273) [user] mfix_vars1(1709, '$VAR'(_56722))
   Call: (274) [system] atom(1709)
^  Redo: (273) [user] mfix_vars1(1709, _52076)
^  Unify: (273) [user] mfix_vars1(1709, _52076)
   Call: (274) [system] 1709==true
^  Redo: (273) [user] mfix_vars1(1709, _52076)
^  Unify: (273) [user] mfix_vars1(1709, _52076)
   Call: (274) [system] 1709==false
^  Redo: (273) [user] mfix_vars1(1709, _52076)
^  Unify: (273) [user] mfix_vars1(1709, _52076)
   Call: (274) [system] 1709==[_66002, _66008]
^  Redo: (273) [user] mfix_vars1(1709, _52076)
^  Unify: (273) [user] mfix_vars1(1709, _52076)
   Call: (274) [system] is_list(1709)
^  Redo: (273) [user] mfix_vars1(1709, _52076)
^  Unify: (273) [user] mfix_vars1(1709, _52076)
   Call: (274) [system] string(1709)
^  Redo: (273) [user] mfix_vars1(1709, _52076)
^  Unify: (273) [user] mfix_vars1(1709, _52076)
   Call: (274) [system] compound(1709)
^  Redo: (273) [user] mfix_vars1(1709, _52076)
^  Unify: (273) [user] mfix_vars1(1709, _52076)
^  Call: (274) [user] symbol(1709)
^  Unify: (274) [user] symbol(1709)
   Call: (275) [system] atom(1709)
   Fail: (275) [system] atom(1709)
^  Fail: (274) [user] symbol(1709)
^  Redo: (273) [user] mfix_vars1(1709, _52076)
   Call: (274) [system] 1709=_52076
   Exit: (274) [system] 1709=1709
^  Exit: (273) [user] mfix_vars1(1709, 1709)
   Call: (273) [apply] apply:maplist_([0], _52078, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_86402|_86404], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _86402)
^  Unify: (274) [user] mfix_vars1(0, _86402)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _86402)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_91048))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _86402)
^  Unify: (274) [user] mfix_vars1(0, _86402)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _86402)
^  Unify: (274) [user] mfix_vars1(0, _86402)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _86402)
^  Unify: (274) [user] mfix_vars1(0, _86402)
   Call: (275) [system] 0==[_100328, _100334]
^  Redo: (274) [user] mfix_vars1(0, _86402)
^  Unify: (274) [user] mfix_vars1(0, _86402)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _86402)
^  Unify: (274) [user] mfix_vars1(0, _86402)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _86402)
^  Unify: (274) [user] mfix_vars1(0, _86402)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _86402)
^  Unify: (274) [user] mfix_vars1(0, _86402)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _86402)
   Call: (275) [system] 0=_86402
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _86404, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1709, 0], [1709, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         vec![expr!(\"@doc-formal\"", 1709, 0], [";;         vec![expr!(\"@doc-formal\"", 1709, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         vec![expr!(\"@doc-formal\"", 1709, 0], [";;         vec![expr!(\"@doc-formal\"", 1709, 0])
   Call: (270) [system] compound_name_arguments(_5984, '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1709, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1709, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _5970)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _136576))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _136576))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _136576))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _136576))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _136576)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _136576)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _142162))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _142162))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _142162)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _142162)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _142162)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _136576)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _164482))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _164482))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _164482)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _164482)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _164482)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0)))
   Call: (261) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _193260, [], _193262)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _193260, [], _193262)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _193260, [], _193262)
   Call: (258) [system] atom('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _193260, [], _193262)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _193260, [], _193262)
   Call: (258) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), _202576, _202578)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1709, 0])
^  Call: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1709, 0], _204462, [], _193262)
^  Unify: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1709, 0], [";;         vec![expr!(\"@doc-formal\"", 1709, 0], [], [])
   Call: (259) [system] var([";;         vec![expr!(\"@doc-formal\"", 1709, 0])
^  Redo: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1709, 0], _204462, [], _193262)
^  Unify: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1709, 0], [_208198|_208200], [], _193262)
^  Call: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _208198, [], _209138)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"", [], [])
   Call: (260) [system] var(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _208198, [], _209138)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _208198, [], _209138)
   Call: (260) [system] atom(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _208198, [], _209138)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _208198, [], _209138)
   Call: (260) [system] compound(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _208198, [], _209138)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"", [], [])
^  Exit: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"", [], [])
^  Call: (259) [user] subst_vars([1709, 0], _208200, [], _193262)
^  Unify: (259) [user] subst_vars([1709, 0], [1709, 0], [], [])
   Call: (260) [system] var([1709, 0])
^  Redo: (259) [user] subst_vars([1709, 0], _208200, [], _193262)
^  Unify: (259) [user] subst_vars([1709, 0], [_224070|_224072], [], _193262)
^  Call: (260) [user] subst_vars(1709, _224070, [], _225010)
^  Unify: (260) [user] subst_vars(1709, 1709, [], [])
   Call: (261) [system] var(1709)
^  Redo: (260) [user] subst_vars(1709, _224070, [], _225010)
^  Unify: (260) [user] subst_vars(1709, _224070, [], _225010)
   Call: (261) [system] atom(1709)
^  Redo: (260) [user] subst_vars(1709, _224070, [], _225010)
^  Unify: (260) [user] subst_vars(1709, _224070, [], _225010)
   Call: (261) [system] compound(1709)
^  Redo: (260) [user] subst_vars(1709, _224070, [], _225010)
^  Unify: (260) [user] subst_vars(1709, 1709, [], [])
^  Exit: (260) [user] subst_vars(1709, 1709, [], [])
^  Call: (260) [user] subst_vars([0], _224072, [], _193262)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _224072, [], _193262)
^  Unify: (260) [user] subst_vars([0], [_239942|_239944], [], _193262)
^  Call: (261) [user] subst_vars(0, _239942, [], _240882)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _239942, [], _240882)
^  Unify: (261) [user] subst_vars(0, _239942, [], _240882)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _239942, [], _240882)
^  Unify: (261) [user] subst_vars(0, _239942, [], _240882)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _239942, [], _240882)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _239944, [], _193262)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _239944, [], _193262)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1709, 0], [1709, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1709, 0], [";;         vec![expr!(\"@doc-formal\"", 1709, 0], [], [])
   Call: (258) [system] compound_name_arguments(_193260, '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1709, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1709, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), [], [])
   Call: (257) [system] _263300=metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1709, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1710, 0, 61035, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$stream_position'(61035, 1710, 0, 61069)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _316028))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _316028))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _316028)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _316028)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _316028)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _316028)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _321640))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _321640))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _321640))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _321640))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _321640)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _321640)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _327226))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _327226))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _327226)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _327226)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _327226)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _327226)
   Call: (270) [system] var('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _327226)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$VAR'(_334686))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _327226)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _327226)
   Call: (270) [system] '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _327226)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _327226)
   Call: (270) [system] '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _327226)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _327226)
   Call: (270) [system] '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0)==[_343966, _343972]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _327226)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _327226)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _327226)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _327226)
   Call: (270) [system] string('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _327226)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _327226)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _354168, _354170)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT', [";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0], _357910)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0], _357910)
   Call: (271) [apply] apply:maplist_([";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0], _357910, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0], [_360728|_360730], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _360728)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _360728)
   Call: (273) [system] var(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _360728)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", '$VAR'(_365374))
   Call: (273) [system] atom(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _360728)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _360728)
   Call: (273) [system] ";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _360728)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _360728)
   Call: (273) [system] ";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _360728)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _360728)
   Call: (273) [system] ";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))"==[_374654, _374660]
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _360728)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _360728)
   Call: (273) [system] is_list(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _360728)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _360728)
   Call: (273) [system] string(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))")
   Exit: (273) [system] string(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _360728)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _360728)
   Call: (273) [system] compound(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _360728)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _360728)
^  Call: (273) [user] symbol(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))")
^  Unify: (273) [user] symbol(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))")
   Call: (274) [system] atom(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))")
   Fail: (274) [system] atom(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))")
^  Fail: (273) [user] symbol(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _360728)
   Call: (273) [system] ";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))"=_360728
   Exit: (273) [system] ";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))"=";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))"
^  Exit: (272) [user] mfix_vars1(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", ";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))")
   Call: (272) [apply] apply:maplist_([1710, 0], _360730, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1710, 0], [_398726|_398728], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1710, _398726)
^  Unify: (273) [user] mfix_vars1(1710, _398726)
   Call: (274) [system] var(1710)
^  Redo: (273) [user] mfix_vars1(1710, _398726)
^  Unify: (273) [user] mfix_vars1(1710, '$VAR'(_403372))
   Call: (274) [system] atom(1710)
^  Redo: (273) [user] mfix_vars1(1710, _398726)
^  Unify: (273) [user] mfix_vars1(1710, _398726)
   Call: (274) [system] 1710==true
^  Redo: (273) [user] mfix_vars1(1710, _398726)
^  Unify: (273) [user] mfix_vars1(1710, _398726)
   Call: (274) [system] 1710==false
^  Redo: (273) [user] mfix_vars1(1710, _398726)
^  Unify: (273) [user] mfix_vars1(1710, _398726)
   Call: (274) [system] 1710==[_412652, _412658]
^  Redo: (273) [user] mfix_vars1(1710, _398726)
^  Unify: (273) [user] mfix_vars1(1710, _398726)
   Call: (274) [system] is_list(1710)
^  Redo: (273) [user] mfix_vars1(1710, _398726)
^  Unify: (273) [user] mfix_vars1(1710, _398726)
   Call: (274) [system] string(1710)
^  Redo: (273) [user] mfix_vars1(1710, _398726)
^  Unify: (273) [user] mfix_vars1(1710, _398726)
   Call: (274) [system] compound(1710)
^  Redo: (273) [user] mfix_vars1(1710, _398726)
^  Unify: (273) [user] mfix_vars1(1710, _398726)
^  Call: (274) [user] symbol(1710)
^  Unify: (274) [user] symbol(1710)
   Call: (275) [system] atom(1710)
   Fail: (275) [system] atom(1710)
^  Fail: (274) [user] symbol(1710)
^  Redo: (273) [user] mfix_vars1(1710, _398726)
   Call: (274) [system] 1710=_398726
   Exit: (274) [system] 1710=1710
^  Exit: (273) [user] mfix_vars1(1710, 1710)
   Call: (273) [apply] apply:maplist_([0], _398728, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_433052|_433054], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _433052)
^  Unify: (274) [user] mfix_vars1(0, _433052)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _433052)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_437698))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _433052)
^  Unify: (274) [user] mfix_vars1(0, _433052)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _433052)
^  Unify: (274) [user] mfix_vars1(0, _433052)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _433052)
^  Unify: (274) [user] mfix_vars1(0, _433052)
   Call: (275) [system] 0==[_446978, _446984]
^  Redo: (274) [user] mfix_vars1(0, _433052)
^  Unify: (274) [user] mfix_vars1(0, _433052)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _433052)
^  Unify: (274) [user] mfix_vars1(0, _433052)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _433052)
^  Unify: (274) [user] mfix_vars1(0, _433052)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _433052)
^  Unify: (274) [user] mfix_vars1(0, _433052)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _433052)
   Call: (275) [system] 0=_433052
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _433054, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1710, 0], [1710, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0], [";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0], [";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0])
   Call: (270) [system] compound_name_arguments(_327226, '$COMMENT', [";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT', [";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0)\=@='$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _321640)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _483226))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _483226))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _483226))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _483226))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _483226)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _483226)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _488812))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _488812))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _488812)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _488812)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _488812)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0)\=@='$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _483226)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _316028))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _316028))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _316028))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _316028))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _316028)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _316028)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _511132))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _511132))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _511132)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _511132)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _511132)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0)\=@='$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _316028)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0)\=@='$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _21720, [], _21722)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _21720, [], _21722)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _21720, [], _21722)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _21720, [], _21722)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _21720, [], _21722)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), _31036, _31038)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT', [";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0])
^  Call: (258) [user] subst_vars([";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0], _32922, [], _21722)
^  Unify: (258) [user] subst_vars([";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0], [";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0], [], [])
   Call: (259) [system] var([";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0], _32922, [], _21722)
^  Unify: (258) [user] subst_vars([";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0], [_36658|_36660], [], _21722)
^  Call: (259) [user] subst_vars(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _36658, [], _37598)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", ";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", [], [])
   Call: (260) [system] var(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))")
^  Redo: (259) [user] subst_vars(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _36658, [], _37598)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _36658, [], _37598)
   Call: (260) [system] atom(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))")
^  Redo: (259) [user] subst_vars(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _36658, [], _37598)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _36658, [], _37598)
   Call: (260) [system] compound(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))")
^  Redo: (259) [user] subst_vars(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", _36658, [], _37598)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", ";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", ";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", [], [])
^  Call: (259) [user] subst_vars([1710, 0], _36660, [], _21722)
^  Unify: (259) [user] subst_vars([1710, 0], [1710, 0], [], [])
   Call: (260) [system] var([1710, 0])
^  Redo: (259) [user] subst_vars([1710, 0], _36660, [], _21722)
^  Unify: (259) [user] subst_vars([1710, 0], [_52530|_52532], [], _21722)
^  Call: (260) [user] subst_vars(1710, _52530, [], _53470)
^  Unify: (260) [user] subst_vars(1710, 1710, [], [])
   Call: (261) [system] var(1710)
^  Redo: (260) [user] subst_vars(1710, _52530, [], _53470)
^  Unify: (260) [user] subst_vars(1710, _52530, [], _53470)
   Call: (261) [system] atom(1710)
^  Redo: (260) [user] subst_vars(1710, _52530, [], _53470)
^  Unify: (260) [user] subst_vars(1710, _52530, [], _53470)
   Call: (261) [system] compound(1710)
^  Redo: (260) [user] subst_vars(1710, _52530, [], _53470)
^  Unify: (260) [user] subst_vars(1710, 1710, [], [])
^  Exit: (260) [user] subst_vars(1710, 1710, [], [])
^  Call: (260) [user] subst_vars([0], _52532, [], _21722)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _52532, [], _21722)
^  Unify: (260) [user] subst_vars([0], [_68402|_68404], [], _21722)
^  Call: (261) [user] subst_vars(0, _68402, [], _69342)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _68402, [], _69342)
^  Unify: (261) [user] subst_vars(0, _68402, [], _69342)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _68402, [], _69342)
^  Unify: (261) [user] subst_vars(0, _68402, [], _69342)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _68402, [], _69342)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _68404, [], _21722)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _68404, [], _21722)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1710, 0], [1710, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0], [";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0], [], [])
   Call: (258) [system] compound_name_arguments(_21720, '$COMMENT', [";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT', [";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), [], [])
   Call: (257) [system] _91760=metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" (\"some-func\" \"arg1\" \"arg2\"))", 1710, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1711, 0, 61088, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$stream_position'(61088, 1711, 0, 61122)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _144484))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _144484))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _144484)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _144484)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _144484)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _144484)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _150096))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _150096))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _150096))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _150096))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _150096)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _150096)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _155682))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _155682))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _155682)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _155682)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _155682)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _155682)
   Call: (270) [system] var('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _155682)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$VAR'(_163142))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _155682)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _155682)
   Call: (270) [system] '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _155682)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _155682)
   Call: (270) [system] '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _155682)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _155682)
   Call: (270) [system] '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0)==[_172422, _172428]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _155682)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _155682)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _155682)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _155682)
   Call: (270) [system] string('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _155682)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _155682)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _182624, _182626)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT', [";;             (\"@kind\" \"atom\")", 1711, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@kind\" \"atom\")", 1711, 0], _186366)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@kind\" \"atom\")", 1711, 0], _186366)
   Call: (271) [apply] apply:maplist_([";;             (\"@kind\" \"atom\")", 1711, 0], _186366, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@kind\" \"atom\")", 1711, 0], [_189184|_189186], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _189184)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _189184)
   Call: (273) [system] var(";;             (\"@kind\" \"atom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _189184)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", '$VAR'(_193830))
   Call: (273) [system] atom(";;             (\"@kind\" \"atom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _189184)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _189184)
   Call: (273) [system] ";;             (\"@kind\" \"atom\")"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _189184)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _189184)
   Call: (273) [system] ";;             (\"@kind\" \"atom\")"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _189184)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _189184)
   Call: (273) [system] ";;             (\"@kind\" \"atom\")"==[_203110, _203116]
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _189184)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _189184)
   Call: (273) [system] is_list(";;             (\"@kind\" \"atom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _189184)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _189184)
   Call: (273) [system] string(";;             (\"@kind\" \"atom\")")
   Exit: (273) [system] string(";;             (\"@kind\" \"atom\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _189184)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _189184)
   Call: (273) [system] compound(";;             (\"@kind\" \"atom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _189184)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _189184)
^  Call: (273) [user] symbol(";;             (\"@kind\" \"atom\")")
^  Unify: (273) [user] symbol(";;             (\"@kind\" \"atom\")")
   Call: (274) [system] atom(";;             (\"@kind\" \"atom\")")
   Fail: (274) [system] atom(";;             (\"@kind\" \"atom\")")
^  Fail: (273) [user] symbol(";;             (\"@kind\" \"atom\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", _189184)
   Call: (273) [system] ";;             (\"@kind\" \"atom\")"=_189184
   Exit: (273) [system] ";;             (\"@kind\" \"atom\")"=";;             (\"@kind\" \"atom\")"
^  Exit: (272) [user] mfix_vars1(";;             (\"@kind\" \"atom\")", ";;             (\"@kind\" \"atom\")")
   Call: (272) [apply] apply:maplist_([1711, 0], _189186, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1711, 0], [_227182|_227184], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1711, _227182)
^  Unify: (273) [user] mfix_vars1(1711, _227182)
   Call: (274) [system] var(1711)
^  Redo: (273) [user] mfix_vars1(1711, _227182)
^  Unify: (273) [user] mfix_vars1(1711, '$VAR'(_231828))
   Call: (274) [system] atom(1711)
^  Redo: (273) [user] mfix_vars1(1711, _227182)
^  Unify: (273) [user] mfix_vars1(1711, _227182)
   Call: (274) [system] 1711==true
^  Redo: (273) [user] mfix_vars1(1711, _227182)
^  Unify: (273) [user] mfix_vars1(1711, _227182)
   Call: (274) [system] 1711==false
^  Redo: (273) [user] mfix_vars1(1711, _227182)
^  Unify: (273) [user] mfix_vars1(1711, _227182)
   Call: (274) [system] 1711==[_241108, _241114]
^  Redo: (273) [user] mfix_vars1(1711, _227182)
^  Unify: (273) [user] mfix_vars1(1711, _227182)
   Call: (274) [system] is_list(1711)
^  Redo: (273) [user] mfix_vars1(1711, _227182)
^  Unify: (273) [user] mfix_vars1(1711, _227182)
   Call: (274) [system] string(1711)
^  Redo: (273) [user] mfix_vars1(1711, _227182)
^  Unify: (273) [user] mfix_vars1(1711, _227182)
   Call: (274) [system] compound(1711)
^  Redo: (273) [user] mfix_vars1(1711, _227182)
^  Unify: (273) [user] mfix_vars1(1711, _227182)
^  Call: (274) [user] symbol(1711)
^  Unify: (274) [user] symbol(1711)
   Call: (275) [system] atom(1711)
   Fail: (275) [system] atom(1711)
^  Fail: (274) [user] symbol(1711)
^  Redo: (273) [user] mfix_vars1(1711, _227182)
   Call: (274) [system] 1711=_227182
   Exit: (274) [system] 1711=1711
^  Exit: (273) [user] mfix_vars1(1711, 1711)
   Call: (273) [apply] apply:maplist_([0], _227184, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_261508|_261510], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _261508)
^  Unify: (274) [user] mfix_vars1(0, _261508)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _261508)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_266154))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _261508)
^  Unify: (274) [user] mfix_vars1(0, _261508)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _261508)
^  Unify: (274) [user] mfix_vars1(0, _261508)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _261508)
^  Unify: (274) [user] mfix_vars1(0, _261508)
   Call: (275) [system] 0==[_275434, _275440]
^  Redo: (274) [user] mfix_vars1(0, _261508)
^  Unify: (274) [user] mfix_vars1(0, _261508)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _261508)
^  Unify: (274) [user] mfix_vars1(0, _261508)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _261508)
^  Unify: (274) [user] mfix_vars1(0, _261508)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _261508)
^  Unify: (274) [user] mfix_vars1(0, _261508)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _261508)
   Call: (275) [system] 0=_261508
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _261510, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1711, 0], [1711, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@kind\" \"atom\")", 1711, 0], [";;             (\"@kind\" \"atom\")", 1711, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@kind\" \"atom\")", 1711, 0], [";;             (\"@kind\" \"atom\")", 1711, 0])
   Call: (270) [system] compound_name_arguments(_155682, '$COMMENT', [";;             (\"@kind\" \"atom\")", 1711, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT', [";;             (\"@kind\" \"atom\")", 1711, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0)\=@='$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _150096)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _311682))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _311682))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _311682))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _311682))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _311682)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _311682)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _317268))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _317268))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _317268)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _317268)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _317268)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0)\=@='$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _311682)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _144484))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _144484))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _144484))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _144484))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _144484)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _144484)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _339588))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _339588))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _339588)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _339588)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _339588)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0)\=@='$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _144484)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0)\=@='$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _368366, [], _368368)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _368366, [], _368368)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _368366, [], _368368)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _368366, [], _368368)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _368366, [], _368368)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), _377682, _377684)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT', [";;             (\"@kind\" \"atom\")", 1711, 0])
^  Call: (258) [user] subst_vars([";;             (\"@kind\" \"atom\")", 1711, 0], _379568, [], _368368)
^  Unify: (258) [user] subst_vars([";;             (\"@kind\" \"atom\")", 1711, 0], [";;             (\"@kind\" \"atom\")", 1711, 0], [], [])
   Call: (259) [system] var([";;             (\"@kind\" \"atom\")", 1711, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@kind\" \"atom\")", 1711, 0], _379568, [], _368368)
^  Unify: (258) [user] subst_vars([";;             (\"@kind\" \"atom\")", 1711, 0], [_383304|_383306], [], _368368)
^  Call: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", _383304, [], _384244)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", ";;             (\"@kind\" \"atom\")", [], [])
   Call: (260) [system] var(";;             (\"@kind\" \"atom\")")
^  Redo: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", _383304, [], _384244)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", _383304, [], _384244)
   Call: (260) [system] atom(";;             (\"@kind\" \"atom\")")
^  Redo: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", _383304, [], _384244)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", _383304, [], _384244)
   Call: (260) [system] compound(";;             (\"@kind\" \"atom\")")
^  Redo: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", _383304, [], _384244)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", ";;             (\"@kind\" \"atom\")", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@kind\" \"atom\")", ";;             (\"@kind\" \"atom\")", [], [])
^  Call: (259) [user] subst_vars([1711, 0], _383306, [], _368368)
^  Unify: (259) [user] subst_vars([1711, 0], [1711, 0], [], [])
   Call: (260) [system] var([1711, 0])
^  Redo: (259) [user] subst_vars([1711, 0], _383306, [], _368368)
^  Unify: (259) [user] subst_vars([1711, 0], [_399176|_399178], [], _368368)
^  Call: (260) [user] subst_vars(1711, _399176, [], _400116)
^  Unify: (260) [user] subst_vars(1711, 1711, [], [])
   Call: (261) [system] var(1711)
^  Redo: (260) [user] subst_vars(1711, _399176, [], _400116)
^  Unify: (260) [user] subst_vars(1711, _399176, [], _400116)
   Call: (261) [system] atom(1711)
^  Redo: (260) [user] subst_vars(1711, _399176, [], _400116)
^  Unify: (260) [user] subst_vars(1711, _399176, [], _400116)
   Call: (261) [system] compound(1711)
^  Redo: (260) [user] subst_vars(1711, _399176, [], _400116)
^  Unify: (260) [user] subst_vars(1711, 1711, [], [])
^  Exit: (260) [user] subst_vars(1711, 1711, [], [])
^  Call: (260) [user] subst_vars([0], _399178, [], _368368)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _399178, [], _368368)
^  Unify: (260) [user] subst_vars([0], [_415048|_415050], [], _368368)
^  Call: (261) [user] subst_vars(0, _415048, [], _415988)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _415048, [], _415988)
^  Unify: (261) [user] subst_vars(0, _415048, [], _415988)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _415048, [], _415988)
^  Unify: (261) [user] subst_vars(0, _415048, [], _415988)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _415048, [], _415988)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _415050, [], _368368)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _415050, [], _368368)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1711, 0], [1711, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@kind\" \"atom\")", 1711, 0], [";;             (\"@kind\" \"atom\")", 1711, 0], [], [])
   Call: (258) [system] compound_name_arguments(_368366, '$COMMENT', [";;             (\"@kind\" \"atom\")", 1711, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT', [";;             (\"@kind\" \"atom\")", 1711, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), [], [])
   Call: (257) [system] _438406=metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"atom\")", 1711, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1712, 0, 61120, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$stream_position'(61120, 1712, 0, 61154)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _491130))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _491130))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _491130)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _491130)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _491130)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _491130)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _496742))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _496742))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _496742))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _496742))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _496742)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _496742)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _502328))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _502328))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _502328)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _502328)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _502328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _502328)
   Call: (270) [system] var('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _502328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$VAR'(_509788))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _502328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _502328)
   Call: (270) [system] '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _502328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _502328)
   Call: (270) [system] '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _502328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _502328)
   Call: (270) [system] '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0)==[_519068, _519074]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _502328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _502328)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _502328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _5984)
   Call: (270) [system] string('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _5984)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _5984)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _11336, _11338)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT', [";;             (\"@type\" \"ReturnType\")", 1712, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@type\" \"ReturnType\")", 1712, 0], _15078)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@type\" \"ReturnType\")", 1712, 0], _15078)
   Call: (271) [apply] apply:maplist_([";;             (\"@type\" \"ReturnType\")", 1712, 0], _15078, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@type\" \"ReturnType\")", 1712, 0], [_17896|_17898], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@type\" \"ReturnType\")", _17896)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"ReturnType\")", _17896)
   Call: (273) [system] var(";;             (\"@type\" \"ReturnType\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"ReturnType\")", _17896)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"ReturnType\")", '$VAR'(_22542))
   Call: (273) [system] atom(";;             (\"@type\" \"ReturnType\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"ReturnType\")", _17896)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"ReturnType\")", _17896)
   Call: (273) [system] ";;             (\"@type\" \"ReturnType\")"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"ReturnType\")", _17896)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"ReturnType\")", _17896)
   Call: (273) [system] ";;             (\"@type\" \"ReturnType\")"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"ReturnType\")", _17896)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"ReturnType\")", _17896)
   Call: (273) [system] ";;             (\"@type\" \"ReturnType\")"==[_31822, _31828]
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"ReturnType\")", _17896)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"ReturnType\")", _17896)
   Call: (273) [system] is_list(";;             (\"@type\" \"ReturnType\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"ReturnType\")", _17896)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"ReturnType\")", _17896)
   Call: (273) [system] string(";;             (\"@type\" \"ReturnType\")")
   Exit: (273) [system] string(";;             (\"@type\" \"ReturnType\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"ReturnType\")", _17896)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"ReturnType\")", _17896)
   Call: (273) [system] compound(";;             (\"@type\" \"ReturnType\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"ReturnType\")", _17896)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"ReturnType\")", _17896)
^  Call: (273) [user] symbol(";;             (\"@type\" \"ReturnType\")")
^  Unify: (273) [user] symbol(";;             (\"@type\" \"ReturnType\")")
   Call: (274) [system] atom(";;             (\"@type\" \"ReturnType\")")
   Fail: (274) [system] atom(";;             (\"@type\" \"ReturnType\")")
^  Fail: (273) [user] symbol(";;             (\"@type\" \"ReturnType\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"ReturnType\")", _17896)
   Call: (273) [system] ";;             (\"@type\" \"ReturnType\")"=_17896
   Exit: (273) [system] ";;             (\"@type\" \"ReturnType\")"=";;             (\"@type\" \"ReturnType\")"
^  Exit: (272) [user] mfix_vars1(";;             (\"@type\" \"ReturnType\")", ";;             (\"@type\" \"ReturnType\")")
   Call: (272) [apply] apply:maplist_([1712, 0], _17898, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1712, 0], [_55894|_55896], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1712, _55894)
^  Unify: (273) [user] mfix_vars1(1712, _55894)
   Call: (274) [system] var(1712)
^  Redo: (273) [user] mfix_vars1(1712, _55894)
^  Unify: (273) [user] mfix_vars1(1712, '$VAR'(_60540))
   Call: (274) [system] atom(1712)
^  Redo: (273) [user] mfix_vars1(1712, _55894)
^  Unify: (273) [user] mfix_vars1(1712, _55894)
   Call: (274) [system] 1712==true
^  Redo: (273) [user] mfix_vars1(1712, _55894)
^  Unify: (273) [user] mfix_vars1(1712, _55894)
   Call: (274) [system] 1712==false
^  Redo: (273) [user] mfix_vars1(1712, _55894)
^  Unify: (273) [user] mfix_vars1(1712, _55894)
   Call: (274) [system] 1712==[_69820, _69826]
^  Redo: (273) [user] mfix_vars1(1712, _55894)
^  Unify: (273) [user] mfix_vars1(1712, _55894)
   Call: (274) [system] is_list(1712)
^  Redo: (273) [user] mfix_vars1(1712, _55894)
^  Unify: (273) [user] mfix_vars1(1712, _55894)
   Call: (274) [system] string(1712)
^  Redo: (273) [user] mfix_vars1(1712, _55894)
^  Unify: (273) [user] mfix_vars1(1712, _55894)
   Call: (274) [system] compound(1712)
^  Redo: (273) [user] mfix_vars1(1712, _55894)
^  Unify: (273) [user] mfix_vars1(1712, _55894)
^  Call: (274) [user] symbol(1712)
^  Unify: (274) [user] symbol(1712)
   Call: (275) [system] atom(1712)
   Fail: (275) [system] atom(1712)
^  Fail: (274) [user] symbol(1712)
^  Redo: (273) [user] mfix_vars1(1712, _55894)
   Call: (274) [system] 1712=_55894
   Exit: (274) [system] 1712=1712
^  Exit: (273) [user] mfix_vars1(1712, 1712)
   Call: (273) [apply] apply:maplist_([0], _55896, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_90220|_90222], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _90220)
^  Unify: (274) [user] mfix_vars1(0, _90220)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _90220)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_94866))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _90220)
^  Unify: (274) [user] mfix_vars1(0, _90220)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _90220)
^  Unify: (274) [user] mfix_vars1(0, _90220)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _90220)
^  Unify: (274) [user] mfix_vars1(0, _90220)
   Call: (275) [system] 0==[_104146, _104152]
^  Redo: (274) [user] mfix_vars1(0, _90220)
^  Unify: (274) [user] mfix_vars1(0, _90220)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _90220)
^  Unify: (274) [user] mfix_vars1(0, _90220)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _90220)
^  Unify: (274) [user] mfix_vars1(0, _90220)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _90220)
^  Unify: (274) [user] mfix_vars1(0, _90220)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _90220)
   Call: (275) [system] 0=_90220
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _90222, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1712, 0], [1712, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@type\" \"ReturnType\")", 1712, 0], [";;             (\"@type\" \"ReturnType\")", 1712, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@type\" \"ReturnType\")", 1712, 0], [";;             (\"@type\" \"ReturnType\")", 1712, 0])
   Call: (270) [system] compound_name_arguments(_5984, '$COMMENT', [";;             (\"@type\" \"ReturnType\")", 1712, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT', [";;             (\"@type\" \"ReturnType\")", 1712, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0)\=@='$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _5970)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _140394))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _140394))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _140394))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _140394))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _140394)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _140394)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _145980))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _145980))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _145980)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _145980)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _145980)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0)\=@='$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _140394)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _168300))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _168300))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _168300)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _168300)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _168300)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0)\=@='$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0)\=@='$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _197078, [], _197080)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _197078, [], _197080)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _197078, [], _197080)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _197078, [], _197080)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _197078, [], _197080)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), _206394, _206396)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT', [";;             (\"@type\" \"ReturnType\")", 1712, 0])
^  Call: (258) [user] subst_vars([";;             (\"@type\" \"ReturnType\")", 1712, 0], _208280, [], _197080)
^  Unify: (258) [user] subst_vars([";;             (\"@type\" \"ReturnType\")", 1712, 0], [";;             (\"@type\" \"ReturnType\")", 1712, 0], [], [])
   Call: (259) [system] var([";;             (\"@type\" \"ReturnType\")", 1712, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@type\" \"ReturnType\")", 1712, 0], _208280, [], _197080)
^  Unify: (258) [user] subst_vars([";;             (\"@type\" \"ReturnType\")", 1712, 0], [_212016|_212018], [], _197080)
^  Call: (259) [user] subst_vars(";;             (\"@type\" \"ReturnType\")", _212016, [], _212956)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" \"ReturnType\")", ";;             (\"@type\" \"ReturnType\")", [], [])
   Call: (260) [system] var(";;             (\"@type\" \"ReturnType\")")
^  Redo: (259) [user] subst_vars(";;             (\"@type\" \"ReturnType\")", _212016, [], _212956)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" \"ReturnType\")", _212016, [], _212956)
   Call: (260) [system] atom(";;             (\"@type\" \"ReturnType\")")
^  Redo: (259) [user] subst_vars(";;             (\"@type\" \"ReturnType\")", _212016, [], _212956)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" \"ReturnType\")", _212016, [], _212956)
   Call: (260) [system] compound(";;             (\"@type\" \"ReturnType\")")
^  Redo: (259) [user] subst_vars(";;             (\"@type\" \"ReturnType\")", _212016, [], _212956)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" \"ReturnType\")", ";;             (\"@type\" \"ReturnType\")", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@type\" \"ReturnType\")", ";;             (\"@type\" \"ReturnType\")", [], [])
^  Call: (259) [user] subst_vars([1712, 0], _212018, [], _197080)
^  Unify: (259) [user] subst_vars([1712, 0], [1712, 0], [], [])
   Call: (260) [system] var([1712, 0])
^  Redo: (259) [user] subst_vars([1712, 0], _212018, [], _197080)
^  Unify: (259) [user] subst_vars([1712, 0], [_227888|_227890], [], _197080)
^  Call: (260) [user] subst_vars(1712, _227888, [], _228828)
^  Unify: (260) [user] subst_vars(1712, 1712, [], [])
   Call: (261) [system] var(1712)
^  Redo: (260) [user] subst_vars(1712, _227888, [], _228828)
^  Unify: (260) [user] subst_vars(1712, _227888, [], _228828)
   Call: (261) [system] atom(1712)
^  Redo: (260) [user] subst_vars(1712, _227888, [], _228828)
^  Unify: (260) [user] subst_vars(1712, _227888, [], _228828)
   Call: (261) [system] compound(1712)
^  Redo: (260) [user] subst_vars(1712, _227888, [], _228828)
^  Unify: (260) [user] subst_vars(1712, 1712, [], [])
^  Exit: (260) [user] subst_vars(1712, 1712, [], [])
^  Call: (260) [user] subst_vars([0], _227890, [], _197080)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _227890, [], _197080)
^  Unify: (260) [user] subst_vars([0], [_243760|_243762], [], _197080)
^  Call: (261) [user] subst_vars(0, _243760, [], _244700)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _243760, [], _244700)
^  Unify: (261) [user] subst_vars(0, _243760, [], _244700)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _243760, [], _244700)
^  Unify: (261) [user] subst_vars(0, _243760, [], _244700)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _243760, [], _244700)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _243762, [], _197080)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _243762, [], _197080)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1712, 0], [1712, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@type\" \"ReturnType\")", 1712, 0], [";;             (\"@type\" \"ReturnType\")", 1712, 0], [], [])
   Call: (258) [system] compound_name_arguments(_197078, '$COMMENT', [";;             (\"@type\" \"ReturnType\")", 1712, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT', [";;             (\"@type\" \"ReturnType\")", 1712, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), [], [])
   Call: (257) [system] _267118=metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"ReturnType\")", 1712, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1713, 0, 61158, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$stream_position'(61158, 1713, 0, 61192)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _319850))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _319850))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _319850)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _319850)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _319850)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _319850)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _325462))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _325462))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _325462))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _325462))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _325462)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _325462)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _331048))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _331048))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _331048)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _331048)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _331048)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _331048)
   Call: (270) [system] var('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _331048)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$VAR'(_338508))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _331048)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _331048)
   Call: (270) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _331048)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _331048)
   Call: (270) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _331048)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _331048)
   Call: (270) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0)==[_347788, _347794]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _331048)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _331048)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _331048)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _331048)
   Call: (270) [system] string('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _331048)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _331048)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _357990, _357992)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0], _361732)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0], _361732)
   Call: (271) [apply] apply:maplist_([";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0], _361732, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0], [_364550|_364552], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _364550)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _364550)
   Call: (273) [system] var(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _364550)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", '$VAR'(_369196))
   Call: (273) [system] atom(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _364550)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _364550)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _364550)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _364550)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _364550)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _364550)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],"==[_378476, _378482]
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _364550)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _364550)
   Call: (273) [system] is_list(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _364550)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _364550)
   Call: (273) [system] string(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
   Exit: (273) [system] string(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _364550)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _364550)
   Call: (273) [system] compound(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _364550)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _364550)
^  Call: (273) [user] symbol(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
^  Unify: (273) [user] symbol(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
   Call: (274) [system] atom(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
   Fail: (274) [system] atom(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
^  Fail: (273) [user] symbol(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _364550)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],"=_364550
   Exit: (273) [system] ";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],"=";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],"
^  Exit: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", ";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
   Call: (272) [apply] apply:maplist_([1713, 0], _364552, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1713, 0], [_402548|_402550], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1713, _402548)
^  Unify: (273) [user] mfix_vars1(1713, _402548)
   Call: (274) [system] var(1713)
^  Redo: (273) [user] mfix_vars1(1713, _402548)
^  Unify: (273) [user] mfix_vars1(1713, '$VAR'(_407194))
   Call: (274) [system] atom(1713)
^  Redo: (273) [user] mfix_vars1(1713, _402548)
^  Unify: (273) [user] mfix_vars1(1713, _402548)
   Call: (274) [system] 1713==true
^  Redo: (273) [user] mfix_vars1(1713, _402548)
^  Unify: (273) [user] mfix_vars1(1713, _402548)
   Call: (274) [system] 1713==false
^  Redo: (273) [user] mfix_vars1(1713, _402548)
^  Unify: (273) [user] mfix_vars1(1713, _402548)
   Call: (274) [system] 1713==[_416474, _416480]
^  Redo: (273) [user] mfix_vars1(1713, _402548)
^  Unify: (273) [user] mfix_vars1(1713, _402548)
   Call: (274) [system] is_list(1713)
^  Redo: (273) [user] mfix_vars1(1713, _402548)
^  Unify: (273) [user] mfix_vars1(1713, _402548)
   Call: (274) [system] string(1713)
^  Redo: (273) [user] mfix_vars1(1713, _402548)
^  Unify: (273) [user] mfix_vars1(1713, _402548)
   Call: (274) [system] compound(1713)
^  Redo: (273) [user] mfix_vars1(1713, _402548)
^  Unify: (273) [user] mfix_vars1(1713, _402548)
^  Call: (274) [user] symbol(1713)
^  Unify: (274) [user] symbol(1713)
   Call: (275) [system] atom(1713)
   Fail: (275) [system] atom(1713)
^  Fail: (274) [user] symbol(1713)
^  Redo: (273) [user] mfix_vars1(1713, _402548)
   Call: (274) [system] 1713=_402548
   Exit: (274) [system] 1713=1713
^  Exit: (273) [user] mfix_vars1(1713, 1713)
   Call: (273) [apply] apply:maplist_([0], _402550, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_436874|_436876], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _436874)
^  Unify: (274) [user] mfix_vars1(0, _436874)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _436874)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_441520))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _436874)
^  Unify: (274) [user] mfix_vars1(0, _436874)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _436874)
^  Unify: (274) [user] mfix_vars1(0, _436874)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _436874)
^  Unify: (274) [user] mfix_vars1(0, _436874)
   Call: (275) [system] 0==[_450800, _450806]
^  Redo: (274) [user] mfix_vars1(0, _436874)
^  Unify: (274) [user] mfix_vars1(0, _436874)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _436874)
^  Unify: (274) [user] mfix_vars1(0, _436874)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _436874)
^  Unify: (274) [user] mfix_vars1(0, _436874)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _436874)
^  Unify: (274) [user] mfix_vars1(0, _436874)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _436874)
   Call: (275) [system] 0=_436874
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _436876, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1713, 0], [1713, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0], [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0], [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0])
   Call: (270) [system] compound_name_arguments(_331048, '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _325462)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _487048))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _487048))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _487048))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _487048))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _487048)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _487048)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _492634))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _492634))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _492634)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _492634)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _492634)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _487048)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _319850))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _319850))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _319850))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _319850))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _319850)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _319850)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _514954))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _514954))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _514954)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _514954)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _514954)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _5958)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _25858, [], _25860)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _25858, [], _25860)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _25858, [], _25860)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _25858, [], _25860)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _25858, [], _25860)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), _35174, _35176)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0])
^  Call: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0], _37060, [], _25860)
^  Unify: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0], [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0], [], [])
   Call: (259) [system] var([";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0], _37060, [], _25860)
^  Unify: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0], [_40796|_40798], [], _25860)
^  Call: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _40796, [], _41736)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", ";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", [], [])
   Call: (260) [system] var(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
^  Redo: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _40796, [], _41736)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _40796, [], _41736)
   Call: (260) [system] atom(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
^  Redo: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _40796, [], _41736)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _40796, [], _41736)
   Call: (260) [system] compound(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],")
^  Redo: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", _40796, [], _41736)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", ";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", ";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", [], [])
^  Call: (259) [user] subst_vars([1713, 0], _40798, [], _25860)
^  Unify: (259) [user] subst_vars([1713, 0], [1713, 0], [], [])
   Call: (260) [system] var([1713, 0])
^  Redo: (259) [user] subst_vars([1713, 0], _40798, [], _25860)
^  Unify: (259) [user] subst_vars([1713, 0], [_56668|_56670], [], _25860)
^  Call: (260) [user] subst_vars(1713, _56668, [], _57608)
^  Unify: (260) [user] subst_vars(1713, 1713, [], [])
   Call: (261) [system] var(1713)
^  Redo: (260) [user] subst_vars(1713, _56668, [], _57608)
^  Unify: (260) [user] subst_vars(1713, _56668, [], _57608)
   Call: (261) [system] atom(1713)
^  Redo: (260) [user] subst_vars(1713, _56668, [], _57608)
^  Unify: (260) [user] subst_vars(1713, _56668, [], _57608)
   Call: (261) [system] compound(1713)
^  Redo: (260) [user] subst_vars(1713, _56668, [], _57608)
^  Unify: (260) [user] subst_vars(1713, 1713, [], [])
^  Exit: (260) [user] subst_vars(1713, 1713, [], [])
^  Call: (260) [user] subst_vars([0], _56670, [], _25860)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _56670, [], _25860)
^  Unify: (260) [user] subst_vars([0], [_72540|_72542], [], _25860)
^  Call: (261) [user] subst_vars(0, _72540, [], _73480)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _72540, [], _73480)
^  Unify: (261) [user] subst_vars(0, _72540, [], _73480)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _72540, [], _73480)
^  Unify: (261) [user] subst_vars(0, _72540, [], _73480)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _72540, [], _73480)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _72542, [], _25860)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _72542, [], _25860)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1713, 0], [1713, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0], [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0], [], [])
   Call: (258) [system] compound_name_arguments(_25858, '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), [], [])
   Call: (257) [system] _95898=metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"No documentation\")}) )],", 1713, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1714, 0, 61223, '$COMMENT'(";;     ]));", 1714, 0), '$stream_position'(61223, 1714, 0, 61257)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1714, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1714, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     ]));", 1714, 0), _148616))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     ]));", 1714, 0), _148616))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     ]));", 1714, 0), _148616)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     ]));", 1714, 0), _148616)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     ]));", 1714, 0), _148616)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     ]));", 1714, 0), _148616)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     ]));", 1714, 0), _154228))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1714, 0), _154228))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1714, 0), _154228))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1714, 0), _154228))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1714, 0), _154228)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1714, 0), _154228)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     ]));", 1714, 0), _159814))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     ]));", 1714, 0), _159814))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     ]));", 1714, 0), _159814)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     ]));", 1714, 0), _159814)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1714, 0), _159814)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1714, 0), _159814)
   Call: (270) [system] var('$COMMENT'(";;     ]));", 1714, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1714, 0), _159814)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1714, 0), '$VAR'(_167274))
   Call: (270) [system] atom('$COMMENT'(";;     ]));", 1714, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1714, 0), _159814)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1714, 0), _159814)
   Call: (270) [system] '$COMMENT'(";;     ]));", 1714, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1714, 0), _159814)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1714, 0), _159814)
   Call: (270) [system] '$COMMENT'(";;     ]));", 1714, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1714, 0), _159814)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1714, 0), _159814)
   Call: (270) [system] '$COMMENT'(";;     ]));", 1714, 0)==[_176554, _176560]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1714, 0), _159814)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1714, 0), _159814)
   Call: (270) [system] is_list('$COMMENT'(";;     ]));", 1714, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1714, 0), _159814)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1714, 0), _159814)
   Call: (270) [system] string('$COMMENT'(";;     ]));", 1714, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1714, 0), _159814)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1714, 0), _159814)
   Call: (270) [system] compound('$COMMENT'(";;     ]));", 1714, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     ]));", 1714, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1714, 0), _186756, _186758)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1714, 0), '$COMMENT', [";;     ]));", 1714, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     ]));", 1714, 0], _190498)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     ]));", 1714, 0], _190498)
   Call: (271) [apply] apply:maplist_([";;     ]));", 1714, 0], _190498, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     ]));", 1714, 0], [_193316|_193318], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     ]));", _193316)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _193316)
   Call: (273) [system] var(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _193316)
^  Unify: (272) [user] mfix_vars1(";;     ]));", '$VAR'(_197962))
   Call: (273) [system] atom(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _193316)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _193316)
   Call: (273) [system] ";;     ]));"==true
^  Redo: (272) [user] mfix_vars1(";;     ]));", _193316)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _193316)
   Call: (273) [system] ";;     ]));"==false
^  Redo: (272) [user] mfix_vars1(";;     ]));", _193316)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _193316)
   Call: (273) [system] ";;     ]));"==[_207242, _207248]
^  Redo: (272) [user] mfix_vars1(";;     ]));", _193316)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _193316)
   Call: (273) [system] is_list(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _193316)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _193316)
   Call: (273) [system] string(";;     ]));")
   Exit: (273) [system] string(";;     ]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     ]));", _193316)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _193316)
   Call: (273) [system] compound(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _193316)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _193316)
^  Call: (273) [user] symbol(";;     ]));")
^  Unify: (273) [user] symbol(";;     ]));")
   Call: (274) [system] atom(";;     ]));")
   Fail: (274) [system] atom(";;     ]));")
^  Fail: (273) [user] symbol(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _193316)
   Call: (273) [system] ";;     ]));"=_193316
   Exit: (273) [system] ";;     ]));"=";;     ]));"
^  Exit: (272) [user] mfix_vars1(";;     ]));", ";;     ]));")
   Call: (272) [apply] apply:maplist_([1714, 0], _193318, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1714, 0], [_231314|_231316], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1714, _231314)
^  Unify: (273) [user] mfix_vars1(1714, _231314)
   Call: (274) [system] var(1714)
^  Redo: (273) [user] mfix_vars1(1714, _231314)
^  Unify: (273) [user] mfix_vars1(1714, '$VAR'(_235960))
   Call: (274) [system] atom(1714)
^  Redo: (273) [user] mfix_vars1(1714, _231314)
^  Unify: (273) [user] mfix_vars1(1714, _231314)
   Call: (274) [system] 1714==true
^  Redo: (273) [user] mfix_vars1(1714, _231314)
^  Unify: (273) [user] mfix_vars1(1714, _231314)
   Call: (274) [system] 1714==false
^  Redo: (273) [user] mfix_vars1(1714, _231314)
^  Unify: (273) [user] mfix_vars1(1714, _231314)
   Call: (274) [system] 1714==[_245240, _245246]
^  Redo: (273) [user] mfix_vars1(1714, _231314)
^  Unify: (273) [user] mfix_vars1(1714, _231314)
   Call: (274) [system] is_list(1714)
^  Redo: (273) [user] mfix_vars1(1714, _231314)
^  Unify: (273) [user] mfix_vars1(1714, _231314)
   Call: (274) [system] string(1714)
^  Redo: (273) [user] mfix_vars1(1714, _231314)
^  Unify: (273) [user] mfix_vars1(1714, _231314)
   Call: (274) [system] compound(1714)
^  Redo: (273) [user] mfix_vars1(1714, _231314)
^  Unify: (273) [user] mfix_vars1(1714, _231314)
^  Call: (274) [user] symbol(1714)
^  Unify: (274) [user] symbol(1714)
   Call: (275) [system] atom(1714)
   Fail: (275) [system] atom(1714)
^  Fail: (274) [user] symbol(1714)
^  Redo: (273) [user] mfix_vars1(1714, _231314)
   Call: (274) [system] 1714=_231314
   Exit: (274) [system] 1714=1714
^  Exit: (273) [user] mfix_vars1(1714, 1714)
   Call: (273) [apply] apply:maplist_([0], _231316, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_265640|_265642], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _265640)
^  Unify: (274) [user] mfix_vars1(0, _265640)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _265640)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_270286))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _265640)
^  Unify: (274) [user] mfix_vars1(0, _265640)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _265640)
^  Unify: (274) [user] mfix_vars1(0, _265640)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _265640)
^  Unify: (274) [user] mfix_vars1(0, _265640)
   Call: (275) [system] 0==[_279566, _279572]
^  Redo: (274) [user] mfix_vars1(0, _265640)
^  Unify: (274) [user] mfix_vars1(0, _265640)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _265640)
^  Unify: (274) [user] mfix_vars1(0, _265640)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _265640)
^  Unify: (274) [user] mfix_vars1(0, _265640)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _265640)
^  Unify: (274) [user] mfix_vars1(0, _265640)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _265640)
   Call: (275) [system] 0=_265640
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _265642, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1714, 0], [1714, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     ]));", 1714, 0], [";;     ]));", 1714, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     ]));", 1714, 0], [";;     ]));", 1714, 0])
   Call: (270) [system] compound_name_arguments(_159814, '$COMMENT', [";;     ]));", 1714, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1714, 0), '$COMMENT', [";;     ]));", 1714, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0)))
   Call: (267) [system] '$COMMENT'(";;     ]));", 1714, 0)\=@='$COMMENT'(";;     ]));", 1714, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1714, 0), _154228)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     ]));", 1714, 0), _315814))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1714, 0), _315814))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1714, 0), _315814))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1714, 0), _315814))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1714, 0), _315814)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1714, 0), _315814)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     ]));", 1714, 0), _321400))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     ]));", 1714, 0), _321400))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     ]));", 1714, 0), _321400)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     ]));", 1714, 0), _321400)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     ]));", 1714, 0), _321400)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0)))
   Call: (267) [system] '$COMMENT'(";;     ]));", 1714, 0)\=@='$COMMENT'(";;     ]));", 1714, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1714, 0), _315814)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     ]));", 1714, 0), _148616))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1714, 0), _148616))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1714, 0), _148616))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1714, 0), _148616))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1714, 0), _148616)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1714, 0), _148616)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     ]));", 1714, 0), _343720))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     ]));", 1714, 0), _343720))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     ]));", 1714, 0), _343720)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     ]));", 1714, 0), _343720)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     ]));", 1714, 0), _343720)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0)))
   Call: (267) [system] '$COMMENT'(";;     ]));", 1714, 0)\=@='$COMMENT'(";;     ]));", 1714, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1714, 0), _148616)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0)))
   Call: (261) [system] '$COMMENT'(";;     ]));", 1714, 0)\=@='$COMMENT'(";;     ]));", 1714, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1714, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1714, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1714, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1714, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1714, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1714, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1714, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1714, 0), _372498, [], _372500)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     ]));", 1714, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1714, 0), _372498, [], _372500)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1714, 0), _372498, [], _372500)
   Call: (258) [system] atom('$COMMENT'(";;     ]));", 1714, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1714, 0), _372498, [], _372500)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1714, 0), _372498, [], _372500)
   Call: (258) [system] compound('$COMMENT'(";;     ]));", 1714, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     ]));", 1714, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1714, 0), _381814, _381816)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1714, 0), '$COMMENT', [";;     ]));", 1714, 0])
^  Call: (258) [user] subst_vars([";;     ]));", 1714, 0], _383700, [], _372500)
^  Unify: (258) [user] subst_vars([";;     ]));", 1714, 0], [";;     ]));", 1714, 0], [], [])
   Call: (259) [system] var([";;     ]));", 1714, 0])
^  Redo: (258) [user] subst_vars([";;     ]));", 1714, 0], _383700, [], _372500)
^  Unify: (258) [user] subst_vars([";;     ]));", 1714, 0], [_387436|_387438], [], _372500)
^  Call: (259) [user] subst_vars(";;     ]));", _387436, [], _388376)
^  Unify: (259) [user] subst_vars(";;     ]));", ";;     ]));", [], [])
   Call: (260) [system] var(";;     ]));")
^  Redo: (259) [user] subst_vars(";;     ]));", _387436, [], _388376)
^  Unify: (259) [user] subst_vars(";;     ]));", _387436, [], _388376)
   Call: (260) [system] atom(";;     ]));")
^  Redo: (259) [user] subst_vars(";;     ]));", _387436, [], _388376)
^  Unify: (259) [user] subst_vars(";;     ]));", _387436, [], _388376)
   Call: (260) [system] compound(";;     ]));")
^  Redo: (259) [user] subst_vars(";;     ]));", _387436, [], _388376)
^  Unify: (259) [user] subst_vars(";;     ]));", ";;     ]));", [], [])
^  Exit: (259) [user] subst_vars(";;     ]));", ";;     ]));", [], [])
^  Call: (259) [user] subst_vars([1714, 0], _387438, [], _372500)
^  Unify: (259) [user] subst_vars([1714, 0], [1714, 0], [], [])
   Call: (260) [system] var([1714, 0])
^  Redo: (259) [user] subst_vars([1714, 0], _387438, [], _372500)
^  Unify: (259) [user] subst_vars([1714, 0], [_403308|_403310], [], _372500)
^  Call: (260) [user] subst_vars(1714, _403308, [], _404248)
^  Unify: (260) [user] subst_vars(1714, 1714, [], [])
   Call: (261) [system] var(1714)
^  Redo: (260) [user] subst_vars(1714, _403308, [], _404248)
^  Unify: (260) [user] subst_vars(1714, _403308, [], _404248)
   Call: (261) [system] atom(1714)
^  Redo: (260) [user] subst_vars(1714, _403308, [], _404248)
^  Unify: (260) [user] subst_vars(1714, _403308, [], _404248)
   Call: (261) [system] compound(1714)
^  Redo: (260) [user] subst_vars(1714, _403308, [], _404248)
^  Unify: (260) [user] subst_vars(1714, 1714, [], [])
^  Exit: (260) [user] subst_vars(1714, 1714, [], [])
^  Call: (260) [user] subst_vars([0], _403310, [], _372500)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _403310, [], _372500)
^  Unify: (260) [user] subst_vars([0], [_419180|_419182], [], _372500)
^  Call: (261) [user] subst_vars(0, _419180, [], _420120)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _419180, [], _420120)
^  Unify: (261) [user] subst_vars(0, _419180, [], _420120)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _419180, [], _420120)
^  Unify: (261) [user] subst_vars(0, _419180, [], _420120)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _419180, [], _420120)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _419182, [], _372500)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _419182, [], _372500)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1714, 0], [1714, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     ]));", 1714, 0], [";;     ]));", 1714, 0], [], [])
   Call: (258) [system] compound_name_arguments(_372498, '$COMMENT', [";;     ]));", 1714, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1714, 0), '$COMMENT', [";;     ]));", 1714, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1714, 0), '$COMMENT'(";;     ]));", 1714, 0), [], [])
   Call: (257) [system] _442538=metta_file_buffer(+, '$COMMENT'(";;     ]));", 1714, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     ]));", 1714, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     ]));", 1714, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     ]));", 1714, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     ]));", 1714, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1714, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1714, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1714, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1714, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1715, 0, 61235, '$COMMENT'(";; }", 1715, 0), '$stream_position'(61235, 1715, 0, 61269)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1715, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1715, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; }", 1715, 0), _495254))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1715, 0), _495254))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; }", 1715, 0), _495254)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1715, 0), _495254)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1715, 0), _495254)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1715, 0), _495254)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; }", 1715, 0), _500866))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1715, 0), _500866))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1715, 0), _500866))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1715, 0), _500866))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1715, 0), _500866)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1715, 0), _500866)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; }", 1715, 0), _506452))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1715, 0), _506452))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; }", 1715, 0), _506452)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1715, 0), _506452)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; }", 1715, 0), _506452)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1715, 0), _506452)
   Call: (270) [system] var('$COMMENT'(";; }", 1715, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1715, 0), _506452)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1715, 0), '$VAR'(_513912))
   Call: (270) [system] atom('$COMMENT'(";; }", 1715, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1715, 0), _506452)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1715, 0), _506452)
   Call: (270) [system] '$COMMENT'(";; }", 1715, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1715, 0), _506452)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1715, 0), _506452)
   Call: (270) [system] '$COMMENT'(";; }", 1715, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1715, 0), _506452)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1715, 0), _506452)
   Call: (270) [system] '$COMMENT'(";; }", 1715, 0)==[_523192, _523198]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1715, 0), _5976)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1715, 0), _5976)
   Call: (270) [system] is_list('$COMMENT'(";; }", 1715, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1715, 0), _5976)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1715, 0), _5976)
   Call: (270) [system] string('$COMMENT'(";; }", 1715, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1715, 0), _5976)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1715, 0), _5976)
   Call: (270) [system] compound('$COMMENT'(";; }", 1715, 0))
   Exit: (270) [system] compound('$COMMENT'(";; }", 1715, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1715, 0), _15220, _15222)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1715, 0), '$COMMENT', [";; }", 1715, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; }", 1715, 0], _18962)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1715, 0], _18962)
   Call: (271) [apply] apply:maplist_([";; }", 1715, 0], _18962, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; }", 1715, 0], [_21780|_21782], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; }", _21780)
^  Unify: (272) [user] mfix_vars1(";; }", _21780)
   Call: (273) [system] var(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _21780)
^  Unify: (272) [user] mfix_vars1(";; }", '$VAR'(_26426))
   Call: (273) [system] atom(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _21780)
^  Unify: (272) [user] mfix_vars1(";; }", _21780)
   Call: (273) [system] ";; }"==true
^  Redo: (272) [user] mfix_vars1(";; }", _21780)
^  Unify: (272) [user] mfix_vars1(";; }", _21780)
   Call: (273) [system] ";; }"==false
^  Redo: (272) [user] mfix_vars1(";; }", _21780)
^  Unify: (272) [user] mfix_vars1(";; }", _21780)
   Call: (273) [system] ";; }"==[_35706, _35712]
^  Redo: (272) [user] mfix_vars1(";; }", _21780)
^  Unify: (272) [user] mfix_vars1(";; }", _21780)
   Call: (273) [system] is_list(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _21780)
^  Unify: (272) [user] mfix_vars1(";; }", _21780)
   Call: (273) [system] string(";; }")
   Exit: (273) [system] string(";; }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; }", _21780)
^  Unify: (272) [user] mfix_vars1(";; }", _21780)
   Call: (273) [system] compound(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _21780)
^  Unify: (272) [user] mfix_vars1(";; }", _21780)
^  Call: (273) [user] symbol(";; }")
^  Unify: (273) [user] symbol(";; }")
   Call: (274) [system] atom(";; }")
   Fail: (274) [system] atom(";; }")
^  Fail: (273) [user] symbol(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _21780)
   Call: (273) [system] ";; }"=_21780
   Exit: (273) [system] ";; }"=";; }"
^  Exit: (272) [user] mfix_vars1(";; }", ";; }")
   Call: (272) [apply] apply:maplist_([1715, 0], _21782, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1715, 0], [_59778|_59780], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1715, _59778)
^  Unify: (273) [user] mfix_vars1(1715, _59778)
   Call: (274) [system] var(1715)
^  Redo: (273) [user] mfix_vars1(1715, _59778)
^  Unify: (273) [user] mfix_vars1(1715, '$VAR'(_64424))
   Call: (274) [system] atom(1715)
^  Redo: (273) [user] mfix_vars1(1715, _59778)
^  Unify: (273) [user] mfix_vars1(1715, _59778)
   Call: (274) [system] 1715==true
^  Redo: (273) [user] mfix_vars1(1715, _59778)
^  Unify: (273) [user] mfix_vars1(1715, _59778)
   Call: (274) [system] 1715==false
^  Redo: (273) [user] mfix_vars1(1715, _59778)
^  Unify: (273) [user] mfix_vars1(1715, _59778)
   Call: (274) [system] 1715==[_73704, _73710]
^  Redo: (273) [user] mfix_vars1(1715, _59778)
^  Unify: (273) [user] mfix_vars1(1715, _59778)
   Call: (274) [system] is_list(1715)
^  Redo: (273) [user] mfix_vars1(1715, _59778)
^  Unify: (273) [user] mfix_vars1(1715, _59778)
   Call: (274) [system] string(1715)
^  Redo: (273) [user] mfix_vars1(1715, _59778)
^  Unify: (273) [user] mfix_vars1(1715, _59778)
   Call: (274) [system] compound(1715)
^  Redo: (273) [user] mfix_vars1(1715, _59778)
^  Unify: (273) [user] mfix_vars1(1715, _59778)
^  Call: (274) [user] symbol(1715)
^  Unify: (274) [user] symbol(1715)
   Call: (275) [system] atom(1715)
   Fail: (275) [system] atom(1715)
^  Fail: (274) [user] symbol(1715)
^  Redo: (273) [user] mfix_vars1(1715, _59778)
   Call: (274) [system] 1715=_59778
   Exit: (274) [system] 1715=1715
^  Exit: (273) [user] mfix_vars1(1715, 1715)
   Call: (273) [apply] apply:maplist_([0], _59780, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_94104|_94106], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _94104)
^  Unify: (274) [user] mfix_vars1(0, _94104)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _94104)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_98750))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _94104)
^  Unify: (274) [user] mfix_vars1(0, _94104)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _94104)
^  Unify: (274) [user] mfix_vars1(0, _94104)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _94104)
^  Unify: (274) [user] mfix_vars1(0, _94104)
   Call: (275) [system] 0==[_108030, _108036]
^  Redo: (274) [user] mfix_vars1(0, _94104)
^  Unify: (274) [user] mfix_vars1(0, _94104)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _94104)
^  Unify: (274) [user] mfix_vars1(0, _94104)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _94104)
^  Unify: (274) [user] mfix_vars1(0, _94104)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _94104)
^  Unify: (274) [user] mfix_vars1(0, _94104)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _94104)
   Call: (275) [system] 0=_94104
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _94106, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1715, 0], [1715, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; }", 1715, 0], [";; }", 1715, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1715, 0], [";; }", 1715, 0])
   Call: (270) [system] compound_name_arguments(_5976, '$COMMENT', [";; }", 1715, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1715, 0), '$COMMENT', [";; }", 1715, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1715, 0)\=@='$COMMENT'(";; }", 1715, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1715, 0), _5962)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; }", 1715, 0), _144278))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1715, 0), _144278))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1715, 0), _144278))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1715, 0), _144278))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1715, 0), _144278)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1715, 0), _144278)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; }", 1715, 0), _149864))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1715, 0), _149864))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; }", 1715, 0), _149864)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1715, 0), _149864)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; }", 1715, 0), _149864)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1715, 0)\=@='$COMMENT'(";; }", 1715, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1715, 0), _144278)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; }", 1715, 0), _5942))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1715, 0), _5942))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1715, 0), _5942))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1715, 0), _5942))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1715, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1715, 0), _5942)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; }", 1715, 0), _172184))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1715, 0), _172184))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; }", 1715, 0), _172184)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1715, 0), _172184)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; }", 1715, 0), _172184)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1715, 0)\=@='$COMMENT'(";; }", 1715, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1715, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0)))
   Call: (261) [system] '$COMMENT'(";; }", 1715, 0)\=@='$COMMENT'(";; }", 1715, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1715, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1715, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1715, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1715, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1715, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; }", 1715, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; }", 1715, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; }", 1715, 0), _200962, [], _200964)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; }", 1715, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1715, 0), _200962, [], _200964)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1715, 0), _200962, [], _200964)
   Call: (258) [system] atom('$COMMENT'(";; }", 1715, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1715, 0), _200962, [], _200964)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1715, 0), _200962, [], _200964)
   Call: (258) [system] compound('$COMMENT'(";; }", 1715, 0))
   Exit: (258) [system] compound('$COMMENT'(";; }", 1715, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1715, 0), _210278, _210280)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1715, 0), '$COMMENT', [";; }", 1715, 0])
^  Call: (258) [user] subst_vars([";; }", 1715, 0], _212164, [], _200964)
^  Unify: (258) [user] subst_vars([";; }", 1715, 0], [";; }", 1715, 0], [], [])
   Call: (259) [system] var([";; }", 1715, 0])
^  Redo: (258) [user] subst_vars([";; }", 1715, 0], _212164, [], _200964)
^  Unify: (258) [user] subst_vars([";; }", 1715, 0], [_215900|_215902], [], _200964)
^  Call: (259) [user] subst_vars(";; }", _215900, [], _216840)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
   Call: (260) [system] var(";; }")
^  Redo: (259) [user] subst_vars(";; }", _215900, [], _216840)
^  Unify: (259) [user] subst_vars(";; }", _215900, [], _216840)
   Call: (260) [system] atom(";; }")
^  Redo: (259) [user] subst_vars(";; }", _215900, [], _216840)
^  Unify: (259) [user] subst_vars(";; }", _215900, [], _216840)
   Call: (260) [system] compound(";; }")
^  Redo: (259) [user] subst_vars(";; }", _215900, [], _216840)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Exit: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Call: (259) [user] subst_vars([1715, 0], _215902, [], _200964)
^  Unify: (259) [user] subst_vars([1715, 0], [1715, 0], [], [])
   Call: (260) [system] var([1715, 0])
^  Redo: (259) [user] subst_vars([1715, 0], _215902, [], _200964)
^  Unify: (259) [user] subst_vars([1715, 0], [_231772|_231774], [], _200964)
^  Call: (260) [user] subst_vars(1715, _231772, [], _232712)
^  Unify: (260) [user] subst_vars(1715, 1715, [], [])
   Call: (261) [system] var(1715)
^  Redo: (260) [user] subst_vars(1715, _231772, [], _232712)
^  Unify: (260) [user] subst_vars(1715, _231772, [], _232712)
   Call: (261) [system] atom(1715)
^  Redo: (260) [user] subst_vars(1715, _231772, [], _232712)
^  Unify: (260) [user] subst_vars(1715, _231772, [], _232712)
   Call: (261) [system] compound(1715)
^  Redo: (260) [user] subst_vars(1715, _231772, [], _232712)
^  Unify: (260) [user] subst_vars(1715, 1715, [], [])
^  Exit: (260) [user] subst_vars(1715, 1715, [], [])
^  Call: (260) [user] subst_vars([0], _231774, [], _200964)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _231774, [], _200964)
^  Unify: (260) [user] subst_vars([0], [_247644|_247646], [], _200964)
^  Call: (261) [user] subst_vars(0, _247644, [], _248584)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _247644, [], _248584)
^  Unify: (261) [user] subst_vars(0, _247644, [], _248584)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _247644, [], _248584)
^  Unify: (261) [user] subst_vars(0, _247644, [], _248584)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _247644, [], _248584)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _247646, [], _200964)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _247646, [], _200964)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1715, 0], [1715, 0], [], [])
^  Exit: (258) [user] subst_vars([";; }", 1715, 0], [";; }", 1715, 0], [], [])
   Call: (258) [system] compound_name_arguments(_200962, '$COMMENT', [";; }", 1715, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1715, 0), '$COMMENT', [";; }", 1715, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; }", 1715, 0), '$COMMENT'(";; }", 1715, 0), [], [])
   Call: (257) [system] _271002=metta_file_buffer(+, '$COMMENT'(";; }", 1715, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; }", 1715, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; }", 1715, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1715, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1715, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1715, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1715, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1715, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1715, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1717, 0, 61241, '$COMMENT'(";; Converted:", 1717, 0), '$stream_position'(61241, 1717, 0, 61275)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1717, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1717, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1717, 0), _323720))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1717, 0), _323720))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1717, 0), _323720)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1717, 0), _323720)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1717, 0), _323720)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1717, 0), _323720)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1717, 0), _329332))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1717, 0), _329332))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1717, 0), _329332))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1717, 0), _329332))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1717, 0), _329332)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1717, 0), _329332)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1717, 0), _334918))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1717, 0), _334918))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1717, 0), _334918)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1717, 0), _334918)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1717, 0), _334918)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1717, 0), _334918)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1717, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1717, 0), _334918)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1717, 0), '$VAR'(_342378))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1717, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1717, 0), _334918)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1717, 0), _334918)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1717, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1717, 0), _334918)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1717, 0), _334918)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1717, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1717, 0), _334918)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1717, 0), _334918)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1717, 0)==[_351658, _351664]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1717, 0), _334918)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1717, 0), _334918)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1717, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1717, 0), _334918)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1717, 0), _334918)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1717, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1717, 0), _334918)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1717, 0), _334918)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1717, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1717, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1717, 0), _361860, _361862)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1717, 0), '$COMMENT', [";; Converted:", 1717, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1717, 0], _365602)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1717, 0], _365602)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1717, 0], _365602, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1717, 0], [_368420|_368422], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _368420)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _368420)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _368420)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_373066))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _368420)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _368420)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _368420)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _368420)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _368420)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _368420)
   Call: (273) [system] ";; Converted:"==[_382346, _382352]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _368420)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _368420)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _368420)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _368420)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _368420)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _368420)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _368420)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _368420)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _368420)
   Call: (273) [system] ";; Converted:"=_368420
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1717, 0], _368422, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1717, 0], [_406418|_406420], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1717, _406418)
^  Unify: (273) [user] mfix_vars1(1717, _406418)
   Call: (274) [system] var(1717)
^  Redo: (273) [user] mfix_vars1(1717, _406418)
^  Unify: (273) [user] mfix_vars1(1717, '$VAR'(_411064))
   Call: (274) [system] atom(1717)
^  Redo: (273) [user] mfix_vars1(1717, _406418)
^  Unify: (273) [user] mfix_vars1(1717, _406418)
   Call: (274) [system] 1717==true
^  Redo: (273) [user] mfix_vars1(1717, _406418)
^  Unify: (273) [user] mfix_vars1(1717, _406418)
   Call: (274) [system] 1717==false
^  Redo: (273) [user] mfix_vars1(1717, _406418)
^  Unify: (273) [user] mfix_vars1(1717, _406418)
   Call: (274) [system] 1717==[_420344, _420350]
^  Redo: (273) [user] mfix_vars1(1717, _406418)
^  Unify: (273) [user] mfix_vars1(1717, _406418)
   Call: (274) [system] is_list(1717)
^  Redo: (273) [user] mfix_vars1(1717, _406418)
^  Unify: (273) [user] mfix_vars1(1717, _406418)
   Call: (274) [system] string(1717)
^  Redo: (273) [user] mfix_vars1(1717, _406418)
^  Unify: (273) [user] mfix_vars1(1717, _406418)
   Call: (274) [system] compound(1717)
^  Redo: (273) [user] mfix_vars1(1717, _406418)
^  Unify: (273) [user] mfix_vars1(1717, _406418)
^  Call: (274) [user] symbol(1717)
^  Unify: (274) [user] symbol(1717)
   Call: (275) [system] atom(1717)
   Fail: (275) [system] atom(1717)
^  Fail: (274) [user] symbol(1717)
^  Redo: (273) [user] mfix_vars1(1717, _406418)
   Call: (274) [system] 1717=_406418
   Exit: (274) [system] 1717=1717
^  Exit: (273) [user] mfix_vars1(1717, 1717)
   Call: (273) [apply] apply:maplist_([0], _406420, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_440744|_440746], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _440744)
^  Unify: (274) [user] mfix_vars1(0, _440744)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _440744)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_445390))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _440744)
^  Unify: (274) [user] mfix_vars1(0, _440744)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _440744)
^  Unify: (274) [user] mfix_vars1(0, _440744)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _440744)
^  Unify: (274) [user] mfix_vars1(0, _440744)
   Call: (275) [system] 0==[_454670, _454676]
^  Redo: (274) [user] mfix_vars1(0, _440744)
^  Unify: (274) [user] mfix_vars1(0, _440744)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _440744)
^  Unify: (274) [user] mfix_vars1(0, _440744)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _440744)
^  Unify: (274) [user] mfix_vars1(0, _440744)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _440744)
^  Unify: (274) [user] mfix_vars1(0, _440744)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _440744)
   Call: (275) [system] 0=_440744
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _440746, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1717, 0], [1717, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1717, 0], [";; Converted:", 1717, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1717, 0], [";; Converted:", 1717, 0])
   Call: (270) [system] compound_name_arguments(_334918, '$COMMENT', [";; Converted:", 1717, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1717, 0), '$COMMENT', [";; Converted:", 1717, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1717, 0)\=@='$COMMENT'(";; Converted:", 1717, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1717, 0), _329332)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1717, 0), _490918))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1717, 0), _490918))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1717, 0), _490918))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1717, 0), _490918))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1717, 0), _490918)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1717, 0), _490918)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1717, 0), _496504))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1717, 0), _496504))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1717, 0), _496504)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1717, 0), _496504)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1717, 0), _496504)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1717, 0)\=@='$COMMENT'(";; Converted:", 1717, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1717, 0), _490918)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1717, 0), _323720))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1717, 0), _323720))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1717, 0), _323720))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1717, 0), _323720))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1717, 0), _323720)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1717, 0), _323720)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1717, 0), _518824))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1717, 0), _518824))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1717, 0), _518824)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1717, 0), _518824)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1717, 0), _518824)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1717, 0)\=@='$COMMENT'(";; Converted:", 1717, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1717, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1717, 0)\=@='$COMMENT'(";; Converted:", 1717, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1717, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1717, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1717, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1717, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1717, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1717, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1717, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1717, 0), _29696, [], _29698)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1717, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1717, 0), _29696, [], _29698)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1717, 0), _29696, [], _29698)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1717, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1717, 0), _29696, [], _29698)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1717, 0), _29696, [], _29698)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1717, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1717, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1717, 0), _39012, _39014)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1717, 0), '$COMMENT', [";; Converted:", 1717, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1717, 0], _40898, [], _29698)
^  Unify: (258) [user] subst_vars([";; Converted:", 1717, 0], [";; Converted:", 1717, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1717, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1717, 0], _40898, [], _29698)
^  Unify: (258) [user] subst_vars([";; Converted:", 1717, 0], [_44634|_44636], [], _29698)
^  Call: (259) [user] subst_vars(";; Converted:", _44634, [], _45574)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _44634, [], _45574)
^  Unify: (259) [user] subst_vars(";; Converted:", _44634, [], _45574)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _44634, [], _45574)
^  Unify: (259) [user] subst_vars(";; Converted:", _44634, [], _45574)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _44634, [], _45574)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1717, 0], _44636, [], _29698)
^  Unify: (259) [user] subst_vars([1717, 0], [1717, 0], [], [])
   Call: (260) [system] var([1717, 0])
^  Redo: (259) [user] subst_vars([1717, 0], _44636, [], _29698)
^  Unify: (259) [user] subst_vars([1717, 0], [_60506|_60508], [], _29698)
^  Call: (260) [user] subst_vars(1717, _60506, [], _61446)
^  Unify: (260) [user] subst_vars(1717, 1717, [], [])
   Call: (261) [system] var(1717)
^  Redo: (260) [user] subst_vars(1717, _60506, [], _61446)
^  Unify: (260) [user] subst_vars(1717, _60506, [], _61446)
   Call: (261) [system] atom(1717)
^  Redo: (260) [user] subst_vars(1717, _60506, [], _61446)
^  Unify: (260) [user] subst_vars(1717, _60506, [], _61446)
   Call: (261) [system] compound(1717)
^  Redo: (260) [user] subst_vars(1717, _60506, [], _61446)
^  Unify: (260) [user] subst_vars(1717, 1717, [], [])
^  Exit: (260) [user] subst_vars(1717, 1717, [], [])
^  Call: (260) [user] subst_vars([0], _60508, [], _29698)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _60508, [], _29698)
^  Unify: (260) [user] subst_vars([0], [_76378|_76380], [], _29698)
^  Call: (261) [user] subst_vars(0, _76378, [], _77318)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _76378, [], _77318)
^  Unify: (261) [user] subst_vars(0, _76378, [], _77318)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _76378, [], _77318)
^  Unify: (261) [user] subst_vars(0, _76378, [], _77318)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _76378, [], _77318)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _76380, [], _29698)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _76380, [], _29698)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1717, 0], [1717, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1717, 0], [";; Converted:", 1717, 0], [], [])
   Call: (258) [system] compound_name_arguments(_29696, '$COMMENT', [";; Converted:", 1717, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1717, 0), '$COMMENT', [";; Converted:", 1717, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1717, 0), '$COMMENT'(";; Converted:", 1717, 0), [], [])
   Call: (257) [system] _99736=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1717, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1717, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1717, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1717, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1717, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1717, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1717, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1717, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1717, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1734, 0, 61740, '$COMMENT'(";; Original:", 1734, 0), '$stream_position'(61740, 1734, 0, 61774)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1734, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1734, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1734, 0), _152454))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1734, 0), _152454))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1734, 0), _152454)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1734, 0), _152454)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1734, 0), _152454)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1734, 0), _152454)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1734, 0), _158066))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1734, 0), _158066))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1734, 0), _158066))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1734, 0), _158066))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1734, 0), _158066)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1734, 0), _158066)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1734, 0), _163652))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1734, 0), _163652))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1734, 0), _163652)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1734, 0), _163652)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1734, 0), _163652)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1734, 0), _163652)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1734, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1734, 0), _163652)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1734, 0), '$VAR'(_171112))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1734, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1734, 0), _163652)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1734, 0), _163652)
   Call: (270) [system] '$COMMENT'(";; Original:", 1734, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1734, 0), _163652)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1734, 0), _163652)
   Call: (270) [system] '$COMMENT'(";; Original:", 1734, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1734, 0), _163652)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1734, 0), _163652)
   Call: (270) [system] '$COMMENT'(";; Original:", 1734, 0)==[_180392, _180398]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1734, 0), _163652)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1734, 0), _163652)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1734, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1734, 0), _163652)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1734, 0), _163652)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1734, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1734, 0), _163652)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1734, 0), _163652)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1734, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1734, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1734, 0), _190594, _190596)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1734, 0), '$COMMENT', [";; Original:", 1734, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1734, 0], _194336)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1734, 0], _194336)
   Call: (271) [apply] apply:maplist_([";; Original:", 1734, 0], _194336, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1734, 0], [_197154|_197156], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _197154)
^  Unify: (272) [user] mfix_vars1(";; Original:", _197154)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _197154)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_201800))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _197154)
^  Unify: (272) [user] mfix_vars1(";; Original:", _197154)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _197154)
^  Unify: (272) [user] mfix_vars1(";; Original:", _197154)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _197154)
^  Unify: (272) [user] mfix_vars1(";; Original:", _197154)
   Call: (273) [system] ";; Original:"==[_211080, _211086]
^  Redo: (272) [user] mfix_vars1(";; Original:", _197154)
^  Unify: (272) [user] mfix_vars1(";; Original:", _197154)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _197154)
^  Unify: (272) [user] mfix_vars1(";; Original:", _197154)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _197154)
^  Unify: (272) [user] mfix_vars1(";; Original:", _197154)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _197154)
^  Unify: (272) [user] mfix_vars1(";; Original:", _197154)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _197154)
   Call: (273) [system] ";; Original:"=_197154
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1734, 0], _197156, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1734, 0], [_235152|_235154], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1734, _235152)
^  Unify: (273) [user] mfix_vars1(1734, _235152)
   Call: (274) [system] var(1734)
^  Redo: (273) [user] mfix_vars1(1734, _235152)
^  Unify: (273) [user] mfix_vars1(1734, '$VAR'(_239798))
   Call: (274) [system] atom(1734)
^  Redo: (273) [user] mfix_vars1(1734, _235152)
^  Unify: (273) [user] mfix_vars1(1734, _235152)
   Call: (274) [system] 1734==true
^  Redo: (273) [user] mfix_vars1(1734, _235152)
^  Unify: (273) [user] mfix_vars1(1734, _235152)
   Call: (274) [system] 1734==false
^  Redo: (273) [user] mfix_vars1(1734, _235152)
^  Unify: (273) [user] mfix_vars1(1734, _235152)
   Call: (274) [system] 1734==[_249078, _249084]
^  Redo: (273) [user] mfix_vars1(1734, _235152)
^  Unify: (273) [user] mfix_vars1(1734, _235152)
   Call: (274) [system] is_list(1734)
^  Redo: (273) [user] mfix_vars1(1734, _235152)
^  Unify: (273) [user] mfix_vars1(1734, _235152)
   Call: (274) [system] string(1734)
^  Redo: (273) [user] mfix_vars1(1734, _235152)
^  Unify: (273) [user] mfix_vars1(1734, _235152)
   Call: (274) [system] compound(1734)
^  Redo: (273) [user] mfix_vars1(1734, _235152)
^  Unify: (273) [user] mfix_vars1(1734, _235152)
^  Call: (274) [user] symbol(1734)
^  Unify: (274) [user] symbol(1734)
   Call: (275) [system] atom(1734)
   Fail: (275) [system] atom(1734)
^  Fail: (274) [user] symbol(1734)
^  Redo: (273) [user] mfix_vars1(1734, _235152)
   Call: (274) [system] 1734=_235152
   Exit: (274) [system] 1734=1734
^  Exit: (273) [user] mfix_vars1(1734, 1734)
   Call: (273) [apply] apply:maplist_([0], _235154, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_269478|_269480], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _269478)
^  Unify: (274) [user] mfix_vars1(0, _269478)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _269478)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_274124))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _269478)
^  Unify: (274) [user] mfix_vars1(0, _269478)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _269478)
^  Unify: (274) [user] mfix_vars1(0, _269478)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _269478)
^  Unify: (274) [user] mfix_vars1(0, _269478)
   Call: (275) [system] 0==[_283404, _283410]
^  Redo: (274) [user] mfix_vars1(0, _269478)
^  Unify: (274) [user] mfix_vars1(0, _269478)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _269478)
^  Unify: (274) [user] mfix_vars1(0, _269478)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _269478)
^  Unify: (274) [user] mfix_vars1(0, _269478)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _269478)
^  Unify: (274) [user] mfix_vars1(0, _269478)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _269478)
   Call: (275) [system] 0=_269478
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _269480, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1734, 0], [1734, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1734, 0], [";; Original:", 1734, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1734, 0], [";; Original:", 1734, 0])
   Call: (270) [system] compound_name_arguments(_163652, '$COMMENT', [";; Original:", 1734, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1734, 0), '$COMMENT', [";; Original:", 1734, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1734, 0)\=@='$COMMENT'(";; Original:", 1734, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1734, 0), _158066)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1734, 0), _319652))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1734, 0), _319652))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1734, 0), _319652))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1734, 0), _319652))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1734, 0), _319652)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1734, 0), _319652)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1734, 0), _325238))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1734, 0), _325238))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1734, 0), _325238)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1734, 0), _325238)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1734, 0), _325238)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1734, 0)\=@='$COMMENT'(";; Original:", 1734, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1734, 0), _319652)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1734, 0), _152454))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1734, 0), _152454))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1734, 0), _152454))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1734, 0), _152454))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1734, 0), _152454)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1734, 0), _152454)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1734, 0), _347558))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1734, 0), _347558))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1734, 0), _347558)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1734, 0), _347558)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1734, 0), _347558)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1734, 0)\=@='$COMMENT'(";; Original:", 1734, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1734, 0), _152454)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1734, 0)\=@='$COMMENT'(";; Original:", 1734, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1734, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1734, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1734, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1734, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1734, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1734, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1734, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1734, 0), _376336, [], _376338)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1734, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1734, 0), _376336, [], _376338)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1734, 0), _376336, [], _376338)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1734, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1734, 0), _376336, [], _376338)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1734, 0), _376336, [], _376338)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1734, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1734, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1734, 0), _385652, _385654)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1734, 0), '$COMMENT', [";; Original:", 1734, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1734, 0], _387538, [], _376338)
^  Unify: (258) [user] subst_vars([";; Original:", 1734, 0], [";; Original:", 1734, 0], [], [])
   Call: (259) [system] var([";; Original:", 1734, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1734, 0], _387538, [], _376338)
^  Unify: (258) [user] subst_vars([";; Original:", 1734, 0], [_391274|_391276], [], _376338)
^  Call: (259) [user] subst_vars(";; Original:", _391274, [], _392214)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _391274, [], _392214)
^  Unify: (259) [user] subst_vars(";; Original:", _391274, [], _392214)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _391274, [], _392214)
^  Unify: (259) [user] subst_vars(";; Original:", _391274, [], _392214)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _391274, [], _392214)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1734, 0], _391276, [], _376338)
^  Unify: (259) [user] subst_vars([1734, 0], [1734, 0], [], [])
   Call: (260) [system] var([1734, 0])
^  Redo: (259) [user] subst_vars([1734, 0], _391276, [], _376338)
^  Unify: (259) [user] subst_vars([1734, 0], [_407146|_407148], [], _376338)
^  Call: (260) [user] subst_vars(1734, _407146, [], _408086)
^  Unify: (260) [user] subst_vars(1734, 1734, [], [])
   Call: (261) [system] var(1734)
^  Redo: (260) [user] subst_vars(1734, _407146, [], _408086)
^  Unify: (260) [user] subst_vars(1734, _407146, [], _408086)
   Call: (261) [system] atom(1734)
^  Redo: (260) [user] subst_vars(1734, _407146, [], _408086)
^  Unify: (260) [user] subst_vars(1734, _407146, [], _408086)
   Call: (261) [system] compound(1734)
^  Redo: (260) [user] subst_vars(1734, _407146, [], _408086)
^  Unify: (260) [user] subst_vars(1734, 1734, [], [])
^  Exit: (260) [user] subst_vars(1734, 1734, [], [])
^  Call: (260) [user] subst_vars([0], _407148, [], _376338)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _407148, [], _376338)
^  Unify: (260) [user] subst_vars([0], [_423018|_423020], [], _376338)
^  Call: (261) [user] subst_vars(0, _423018, [], _423958)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _423018, [], _423958)
^  Unify: (261) [user] subst_vars(0, _423018, [], _423958)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _423018, [], _423958)
^  Unify: (261) [user] subst_vars(0, _423018, [], _423958)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _423018, [], _423958)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _423020, [], _376338)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _423020, [], _376338)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1734, 0], [1734, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1734, 0], [";; Original:", 1734, 0], [], [])
   Call: (258) [system] compound_name_arguments(_376336, '$COMMENT', [";; Original:", 1734, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1734, 0), '$COMMENT', [";; Original:", 1734, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1734, 0), '$COMMENT'(";; Original:", 1734, 0), [], [])
   Call: (257) [system] _446376=metta_file_buffer(+, '$COMMENT'(";; Original:", 1734, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1734, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1734, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1734, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1734, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1734, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1734, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1734, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1734, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1735, 0, 61753, '$COMMENT'(";; #[test]", 1735, 0), '$stream_position'(61753, 1735, 0, 61787)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1735, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1735, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; #[test]", 1735, 0), _499094))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 1735, 0), _499094))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; #[test]", 1735, 0), _499094)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 1735, 0), _499094)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1735, 0), _499094)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1735, 0), _499094)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; #[test]", 1735, 0), _504706))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1735, 0), _504706))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1735, 0), _504706))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1735, 0), _504706))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1735, 0), _504706)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1735, 0), _504706)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; #[test]", 1735, 0), _510292))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 1735, 0), _510292))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; #[test]", 1735, 0), _510292)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 1735, 0), _510292)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1735, 0), _510292)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1735, 0), _510292)
   Call: (270) [system] var('$COMMENT'(";; #[test]", 1735, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1735, 0), _510292)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1735, 0), '$VAR'(_517752))
   Call: (270) [system] atom('$COMMENT'(";; #[test]", 1735, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1735, 0), _510292)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1735, 0), _510292)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1735, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1735, 0), _510292)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1735, 0), _5978)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1735, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1735, 0), _5978)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1735, 0), _5978)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1735, 0)==[_9130, _9136]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1735, 0), _5978)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1735, 0), _5978)
   Call: (270) [system] is_list('$COMMENT'(";; #[test]", 1735, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1735, 0), _5978)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1735, 0), _5978)
   Call: (270) [system] string('$COMMENT'(";; #[test]", 1735, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1735, 0), _5978)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1735, 0), _5978)
   Call: (270) [system] compound('$COMMENT'(";; #[test]", 1735, 0))
   Exit: (270) [system] compound('$COMMENT'(";; #[test]", 1735, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1735, 0), _19332, _19334)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1735, 0), '$COMMENT', [";; #[test]", 1735, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; #[test]", 1735, 0], _23074)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 1735, 0], _23074)
   Call: (271) [apply] apply:maplist_([";; #[test]", 1735, 0], _23074, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; #[test]", 1735, 0], [_25892|_25894], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; #[test]", _25892)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _25892)
   Call: (273) [system] var(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _25892)
^  Unify: (272) [user] mfix_vars1(";; #[test]", '$VAR'(_30538))
   Call: (273) [system] atom(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _25892)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _25892)
   Call: (273) [system] ";; #[test]"==true
^  Redo: (272) [user] mfix_vars1(";; #[test]", _25892)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _25892)
   Call: (273) [system] ";; #[test]"==false
^  Redo: (272) [user] mfix_vars1(";; #[test]", _25892)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _25892)
   Call: (273) [system] ";; #[test]"==[_39818, _39824]
^  Redo: (272) [user] mfix_vars1(";; #[test]", _25892)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _25892)
   Call: (273) [system] is_list(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _25892)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _25892)
   Call: (273) [system] string(";; #[test]")
   Exit: (273) [system] string(";; #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; #[test]", _25892)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _25892)
   Call: (273) [system] compound(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _25892)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _25892)
^  Call: (273) [user] symbol(";; #[test]")
^  Unify: (273) [user] symbol(";; #[test]")
   Call: (274) [system] atom(";; #[test]")
   Fail: (274) [system] atom(";; #[test]")
^  Fail: (273) [user] symbol(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _25892)
   Call: (273) [system] ";; #[test]"=_25892
   Exit: (273) [system] ";; #[test]"=";; #[test]"
^  Exit: (272) [user] mfix_vars1(";; #[test]", ";; #[test]")
   Call: (272) [apply] apply:maplist_([1735, 0], _25894, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1735, 0], [_63890|_63892], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1735, _63890)
^  Unify: (273) [user] mfix_vars1(1735, _63890)
   Call: (274) [system] var(1735)
^  Redo: (273) [user] mfix_vars1(1735, _63890)
^  Unify: (273) [user] mfix_vars1(1735, '$VAR'(_68536))
   Call: (274) [system] atom(1735)
^  Redo: (273) [user] mfix_vars1(1735, _63890)
^  Unify: (273) [user] mfix_vars1(1735, _63890)
   Call: (274) [system] 1735==true
^  Redo: (273) [user] mfix_vars1(1735, _63890)
^  Unify: (273) [user] mfix_vars1(1735, _63890)
   Call: (274) [system] 1735==false
^  Redo: (273) [user] mfix_vars1(1735, _63890)
^  Unify: (273) [user] mfix_vars1(1735, _63890)
   Call: (274) [system] 1735==[_77816, _77822]
^  Redo: (273) [user] mfix_vars1(1735, _63890)
^  Unify: (273) [user] mfix_vars1(1735, _63890)
   Call: (274) [system] is_list(1735)
^  Redo: (273) [user] mfix_vars1(1735, _63890)
^  Unify: (273) [user] mfix_vars1(1735, _63890)
   Call: (274) [system] string(1735)
^  Redo: (273) [user] mfix_vars1(1735, _63890)
^  Unify: (273) [user] mfix_vars1(1735, _63890)
   Call: (274) [system] compound(1735)
^  Redo: (273) [user] mfix_vars1(1735, _63890)
^  Unify: (273) [user] mfix_vars1(1735, _63890)
^  Call: (274) [user] symbol(1735)
^  Unify: (274) [user] symbol(1735)
   Call: (275) [system] atom(1735)
   Fail: (275) [system] atom(1735)
^  Fail: (274) [user] symbol(1735)
^  Redo: (273) [user] mfix_vars1(1735, _63890)
   Call: (274) [system] 1735=_63890
   Exit: (274) [system] 1735=1735
^  Exit: (273) [user] mfix_vars1(1735, 1735)
   Call: (273) [apply] apply:maplist_([0], _63892, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_98216|_98218], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _98216)
^  Unify: (274) [user] mfix_vars1(0, _98216)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _98216)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_102862))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _98216)
^  Unify: (274) [user] mfix_vars1(0, _98216)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _98216)
^  Unify: (274) [user] mfix_vars1(0, _98216)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _98216)
^  Unify: (274) [user] mfix_vars1(0, _98216)
   Call: (275) [system] 0==[_112142, _112148]
^  Redo: (274) [user] mfix_vars1(0, _98216)
^  Unify: (274) [user] mfix_vars1(0, _98216)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _98216)
^  Unify: (274) [user] mfix_vars1(0, _98216)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _98216)
^  Unify: (274) [user] mfix_vars1(0, _98216)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _98216)
^  Unify: (274) [user] mfix_vars1(0, _98216)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _98216)
   Call: (275) [system] 0=_98216
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _98218, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1735, 0], [1735, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; #[test]", 1735, 0], [";; #[test]", 1735, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 1735, 0], [";; #[test]", 1735, 0])
   Call: (270) [system] compound_name_arguments(_5978, '$COMMENT', [";; #[test]", 1735, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1735, 0), '$COMMENT', [";; #[test]", 1735, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1735, 0)\=@='$COMMENT'(";; #[test]", 1735, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1735, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; #[test]", 1735, 0), _148390))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1735, 0), _148390))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1735, 0), _148390))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1735, 0), _148390))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1735, 0), _148390)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1735, 0), _148390)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; #[test]", 1735, 0), _153976))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 1735, 0), _153976))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; #[test]", 1735, 0), _153976)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 1735, 0), _153976)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1735, 0), _153976)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1735, 0)\=@='$COMMENT'(";; #[test]", 1735, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1735, 0), _148390)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; #[test]", 1735, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1735, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1735, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1735, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1735, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1735, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; #[test]", 1735, 0), _176296))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 1735, 0), _176296))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; #[test]", 1735, 0), _176296)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 1735, 0), _176296)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1735, 0), _176296)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1735, 0)\=@='$COMMENT'(";; #[test]", 1735, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1735, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0)))
   Call: (261) [system] '$COMMENT'(";; #[test]", 1735, 0)\=@='$COMMENT'(";; #[test]", 1735, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1735, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1735, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1735, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1735, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1735, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1735, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1735, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1735, 0), _205074, [], _205076)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; #[test]", 1735, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1735, 0), _205074, [], _205076)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1735, 0), _205074, [], _205076)
   Call: (258) [system] atom('$COMMENT'(";; #[test]", 1735, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1735, 0), _205074, [], _205076)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1735, 0), _205074, [], _205076)
   Call: (258) [system] compound('$COMMENT'(";; #[test]", 1735, 0))
   Exit: (258) [system] compound('$COMMENT'(";; #[test]", 1735, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1735, 0), _214390, _214392)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1735, 0), '$COMMENT', [";; #[test]", 1735, 0])
^  Call: (258) [user] subst_vars([";; #[test]", 1735, 0], _216276, [], _205076)
^  Unify: (258) [user] subst_vars([";; #[test]", 1735, 0], [";; #[test]", 1735, 0], [], [])
   Call: (259) [system] var([";; #[test]", 1735, 0])
^  Redo: (258) [user] subst_vars([";; #[test]", 1735, 0], _216276, [], _205076)
^  Unify: (258) [user] subst_vars([";; #[test]", 1735, 0], [_220012|_220014], [], _205076)
^  Call: (259) [user] subst_vars(";; #[test]", _220012, [], _220952)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
   Call: (260) [system] var(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _220012, [], _220952)
^  Unify: (259) [user] subst_vars(";; #[test]", _220012, [], _220952)
   Call: (260) [system] atom(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _220012, [], _220952)
^  Unify: (259) [user] subst_vars(";; #[test]", _220012, [], _220952)
   Call: (260) [system] compound(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _220012, [], _220952)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Exit: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Call: (259) [user] subst_vars([1735, 0], _220014, [], _205076)
^  Unify: (259) [user] subst_vars([1735, 0], [1735, 0], [], [])
   Call: (260) [system] var([1735, 0])
^  Redo: (259) [user] subst_vars([1735, 0], _220014, [], _205076)
^  Unify: (259) [user] subst_vars([1735, 0], [_235884|_235886], [], _205076)
^  Call: (260) [user] subst_vars(1735, _235884, [], _236824)
^  Unify: (260) [user] subst_vars(1735, 1735, [], [])
   Call: (261) [system] var(1735)
^  Redo: (260) [user] subst_vars(1735, _235884, [], _236824)
^  Unify: (260) [user] subst_vars(1735, _235884, [], _236824)
   Call: (261) [system] atom(1735)
^  Redo: (260) [user] subst_vars(1735, _235884, [], _236824)
^  Unify: (260) [user] subst_vars(1735, _235884, [], _236824)
   Call: (261) [system] compound(1735)
^  Redo: (260) [user] subst_vars(1735, _235884, [], _236824)
^  Unify: (260) [user] subst_vars(1735, 1735, [], [])
^  Exit: (260) [user] subst_vars(1735, 1735, [], [])
^  Call: (260) [user] subst_vars([0], _235886, [], _205076)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _235886, [], _205076)
^  Unify: (260) [user] subst_vars([0], [_251756|_251758], [], _205076)
^  Call: (261) [user] subst_vars(0, _251756, [], _252696)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _251756, [], _252696)
^  Unify: (261) [user] subst_vars(0, _251756, [], _252696)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _251756, [], _252696)
^  Unify: (261) [user] subst_vars(0, _251756, [], _252696)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _251756, [], _252696)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _251758, [], _205076)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _251758, [], _205076)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1735, 0], [1735, 0], [], [])
^  Exit: (258) [user] subst_vars([";; #[test]", 1735, 0], [";; #[test]", 1735, 0], [], [])
   Call: (258) [system] compound_name_arguments(_205074, '$COMMENT', [";; #[test]", 1735, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1735, 0), '$COMMENT', [";; #[test]", 1735, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1735, 0), '$COMMENT'(";; #[test]", 1735, 0), [], [])
   Call: (257) [system] _275114=metta_file_buffer(+, '$COMMENT'(";; #[test]", 1735, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; #[test]", 1735, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; #[test]", 1735, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 1735, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 1735, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1735, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1735, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1735, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1735, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1736, 0, 61764, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$stream_position'(61764, 1736, 0, 61798)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _327836))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _327836))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _327836)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _327836)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _327836)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _327836)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _333448))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _333448))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _333448))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _333448))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _333448)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _333448)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _339034))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _339034))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _339034)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _339034)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _339034)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _339034)
   Call: (270) [system] var('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _339034)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$VAR'(_346494))
   Call: (270) [system] atom('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _339034)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _339034)
   Call: (270) [system] '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _339034)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _339034)
   Call: (270) [system] '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _339034)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _339034)
   Call: (270) [system] '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0)==[_355774, _355780]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _339034)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _339034)
   Call: (270) [system] is_list('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _339034)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _339034)
   Call: (270) [system] string('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _339034)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _339034)
   Call: (270) [system] compound('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
   Exit: (270) [system] compound('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _365976, _365978)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT', [";; fn test_get_doc_no_type() {", 1736, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; fn test_get_doc_no_type() {", 1736, 0], _369718)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn test_get_doc_no_type() {", 1736, 0], _369718)
   Call: (271) [apply] apply:maplist_([";; fn test_get_doc_no_type() {", 1736, 0], _369718, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; fn test_get_doc_no_type() {", 1736, 0], [_372536|_372538], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; fn test_get_doc_no_type() {", _372536)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_no_type() {", _372536)
   Call: (273) [system] var(";; fn test_get_doc_no_type() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_no_type() {", _372536)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_no_type() {", '$VAR'(_377182))
   Call: (273) [system] atom(";; fn test_get_doc_no_type() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_no_type() {", _372536)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_no_type() {", _372536)
   Call: (273) [system] ";; fn test_get_doc_no_type() {"==true
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_no_type() {", _372536)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_no_type() {", _372536)
   Call: (273) [system] ";; fn test_get_doc_no_type() {"==false
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_no_type() {", _372536)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_no_type() {", _372536)
   Call: (273) [system] ";; fn test_get_doc_no_type() {"==[_386462, _386468]
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_no_type() {", _372536)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_no_type() {", _372536)
   Call: (273) [system] is_list(";; fn test_get_doc_no_type() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_no_type() {", _372536)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_no_type() {", _372536)
   Call: (273) [system] string(";; fn test_get_doc_no_type() {")
   Exit: (273) [system] string(";; fn test_get_doc_no_type() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_no_type() {", _372536)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_no_type() {", _372536)
   Call: (273) [system] compound(";; fn test_get_doc_no_type() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_no_type() {", _372536)
^  Unify: (272) [user] mfix_vars1(";; fn test_get_doc_no_type() {", _372536)
^  Call: (273) [user] symbol(";; fn test_get_doc_no_type() {")
^  Unify: (273) [user] symbol(";; fn test_get_doc_no_type() {")
   Call: (274) [system] atom(";; fn test_get_doc_no_type() {")
   Fail: (274) [system] atom(";; fn test_get_doc_no_type() {")
^  Fail: (273) [user] symbol(";; fn test_get_doc_no_type() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_get_doc_no_type() {", _372536)
   Call: (273) [system] ";; fn test_get_doc_no_type() {"=_372536
   Exit: (273) [system] ";; fn test_get_doc_no_type() {"=";; fn test_get_doc_no_type() {"
^  Exit: (272) [user] mfix_vars1(";; fn test_get_doc_no_type() {", ";; fn test_get_doc_no_type() {")
   Call: (272) [apply] apply:maplist_([1736, 0], _372538, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1736, 0], [_410534|_410536], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1736, _410534)
^  Unify: (273) [user] mfix_vars1(1736, _410534)
   Call: (274) [system] var(1736)
^  Redo: (273) [user] mfix_vars1(1736, _410534)
^  Unify: (273) [user] mfix_vars1(1736, '$VAR'(_415180))
   Call: (274) [system] atom(1736)
^  Redo: (273) [user] mfix_vars1(1736, _410534)
^  Unify: (273) [user] mfix_vars1(1736, _410534)
   Call: (274) [system] 1736==true
^  Redo: (273) [user] mfix_vars1(1736, _410534)
^  Unify: (273) [user] mfix_vars1(1736, _410534)
   Call: (274) [system] 1736==false
^  Redo: (273) [user] mfix_vars1(1736, _410534)
^  Unify: (273) [user] mfix_vars1(1736, _410534)
   Call: (274) [system] 1736==[_424460, _424466]
^  Redo: (273) [user] mfix_vars1(1736, _410534)
^  Unify: (273) [user] mfix_vars1(1736, _410534)
   Call: (274) [system] is_list(1736)
^  Redo: (273) [user] mfix_vars1(1736, _410534)
^  Unify: (273) [user] mfix_vars1(1736, _410534)
   Call: (274) [system] string(1736)
^  Redo: (273) [user] mfix_vars1(1736, _410534)
^  Unify: (273) [user] mfix_vars1(1736, _410534)
   Call: (274) [system] compound(1736)
^  Redo: (273) [user] mfix_vars1(1736, _410534)
^  Unify: (273) [user] mfix_vars1(1736, _410534)
^  Call: (274) [user] symbol(1736)
^  Unify: (274) [user] symbol(1736)
   Call: (275) [system] atom(1736)
   Fail: (275) [system] atom(1736)
^  Fail: (274) [user] symbol(1736)
^  Redo: (273) [user] mfix_vars1(1736, _410534)
   Call: (274) [system] 1736=_410534
   Exit: (274) [system] 1736=1736
^  Exit: (273) [user] mfix_vars1(1736, 1736)
   Call: (273) [apply] apply:maplist_([0], _410536, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_444860|_444862], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _444860)
^  Unify: (274) [user] mfix_vars1(0, _444860)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _444860)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_449506))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _444860)
^  Unify: (274) [user] mfix_vars1(0, _444860)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _444860)
^  Unify: (274) [user] mfix_vars1(0, _444860)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _444860)
^  Unify: (274) [user] mfix_vars1(0, _444860)
   Call: (275) [system] 0==[_458786, _458792]
^  Redo: (274) [user] mfix_vars1(0, _444860)
^  Unify: (274) [user] mfix_vars1(0, _444860)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _444860)
^  Unify: (274) [user] mfix_vars1(0, _444860)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _444860)
^  Unify: (274) [user] mfix_vars1(0, _444860)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _444860)
^  Unify: (274) [user] mfix_vars1(0, _444860)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _444860)
   Call: (275) [system] 0=_444860
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _444862, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1736, 0], [1736, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; fn test_get_doc_no_type() {", 1736, 0], [";; fn test_get_doc_no_type() {", 1736, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn test_get_doc_no_type() {", 1736, 0], [";; fn test_get_doc_no_type() {", 1736, 0])
   Call: (270) [system] compound_name_arguments(_339034, '$COMMENT', [";; fn test_get_doc_no_type() {", 1736, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT', [";; fn test_get_doc_no_type() {", 1736, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0)\=@='$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _333448)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _495034))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _495034))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _495034))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _495034))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _495034)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _495034)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _500620))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _500620))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _500620)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _500620)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _500620)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0)\=@='$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _495034)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _327836))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _327836))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _327836))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _327836))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _327836)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _327836)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _522940))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _5986))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _5986)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _5986)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _5986)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0)\=@='$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0)))
   Call: (261) [system] '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0)\=@='$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _33700, [], _33702)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _33700, [], _33702)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _33700, [], _33702)
   Call: (258) [system] atom('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _33700, [], _33702)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _33700, [], _33702)
   Call: (258) [system] compound('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
   Exit: (258) [system] compound('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), _43016, _43018)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT', [";; fn test_get_doc_no_type() {", 1736, 0])
^  Call: (258) [user] subst_vars([";; fn test_get_doc_no_type() {", 1736, 0], _44902, [], _33702)
^  Unify: (258) [user] subst_vars([";; fn test_get_doc_no_type() {", 1736, 0], [";; fn test_get_doc_no_type() {", 1736, 0], [], [])
   Call: (259) [system] var([";; fn test_get_doc_no_type() {", 1736, 0])
^  Redo: (258) [user] subst_vars([";; fn test_get_doc_no_type() {", 1736, 0], _44902, [], _33702)
^  Unify: (258) [user] subst_vars([";; fn test_get_doc_no_type() {", 1736, 0], [_48638|_48640], [], _33702)
^  Call: (259) [user] subst_vars(";; fn test_get_doc_no_type() {", _48638, [], _49578)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_no_type() {", ";; fn test_get_doc_no_type() {", [], [])
   Call: (260) [system] var(";; fn test_get_doc_no_type() {")
^  Redo: (259) [user] subst_vars(";; fn test_get_doc_no_type() {", _48638, [], _49578)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_no_type() {", _48638, [], _49578)
   Call: (260) [system] atom(";; fn test_get_doc_no_type() {")
^  Redo: (259) [user] subst_vars(";; fn test_get_doc_no_type() {", _48638, [], _49578)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_no_type() {", _48638, [], _49578)
   Call: (260) [system] compound(";; fn test_get_doc_no_type() {")
^  Redo: (259) [user] subst_vars(";; fn test_get_doc_no_type() {", _48638, [], _49578)
^  Unify: (259) [user] subst_vars(";; fn test_get_doc_no_type() {", ";; fn test_get_doc_no_type() {", [], [])
^  Exit: (259) [user] subst_vars(";; fn test_get_doc_no_type() {", ";; fn test_get_doc_no_type() {", [], [])
^  Call: (259) [user] subst_vars([1736, 0], _48640, [], _33702)
^  Unify: (259) [user] subst_vars([1736, 0], [1736, 0], [], [])
   Call: (260) [system] var([1736, 0])
^  Redo: (259) [user] subst_vars([1736, 0], _48640, [], _33702)
^  Unify: (259) [user] subst_vars([1736, 0], [_64510|_64512], [], _33702)
^  Call: (260) [user] subst_vars(1736, _64510, [], _65450)
^  Unify: (260) [user] subst_vars(1736, 1736, [], [])
   Call: (261) [system] var(1736)
^  Redo: (260) [user] subst_vars(1736, _64510, [], _65450)
^  Unify: (260) [user] subst_vars(1736, _64510, [], _65450)
   Call: (261) [system] atom(1736)
^  Redo: (260) [user] subst_vars(1736, _64510, [], _65450)
^  Unify: (260) [user] subst_vars(1736, _64510, [], _65450)
   Call: (261) [system] compound(1736)
^  Redo: (260) [user] subst_vars(1736, _64510, [], _65450)
^  Unify: (260) [user] subst_vars(1736, 1736, [], [])
^  Exit: (260) [user] subst_vars(1736, 1736, [], [])
^  Call: (260) [user] subst_vars([0], _64512, [], _33702)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _64512, [], _33702)
^  Unify: (260) [user] subst_vars([0], [_80382|_80384], [], _33702)
^  Call: (261) [user] subst_vars(0, _80382, [], _81322)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _80382, [], _81322)
^  Unify: (261) [user] subst_vars(0, _80382, [], _81322)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _80382, [], _81322)
^  Unify: (261) [user] subst_vars(0, _80382, [], _81322)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _80382, [], _81322)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _80384, [], _33702)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _80384, [], _33702)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1736, 0], [1736, 0], [], [])
^  Exit: (258) [user] subst_vars([";; fn test_get_doc_no_type() {", 1736, 0], [";; fn test_get_doc_no_type() {", 1736, 0], [], [])
   Call: (258) [system] compound_name_arguments(_33700, '$COMMENT', [";; fn test_get_doc_no_type() {", 1736, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT', [";; fn test_get_doc_no_type() {", 1736, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), [], [])
   Call: (257) [system] _103740=metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_get_doc_no_type() {", 1736, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1737, 0, 61795, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$stream_position'(61795, 1737, 0, 61829)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _156470))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _156470))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _156470)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _156470)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _156470)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _156470)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _162082))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _162082))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _162082))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _162082))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _162082)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _162082)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _167668))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _167668))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _167668)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _167668)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _167668)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _167668)
   Call: (270) [system] var('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _167668)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$VAR'(_175128))
   Call: (270) [system] atom('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _167668)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _167668)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _167668)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _167668)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _167668)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _167668)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0)==[_184408, _184414]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _167668)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _167668)
   Call: (270) [system] is_list('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _167668)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _167668)
   Call: (270) [system] string('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _167668)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _167668)
   Call: (270) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _194610, _194612)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0], _198352)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0], _198352)
   Call: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0], _198352, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0], [_201170|_201172], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _201170)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _201170)
   Call: (273) [system] var(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _201170)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", '$VAR'(_205816))
   Call: (273) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _201170)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _201170)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==true
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _201170)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _201170)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==false
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _201170)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _201170)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==[_215096, _215102]
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _201170)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _201170)
   Call: (273) [system] is_list(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _201170)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _201170)
   Call: (273) [system] string(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Exit: (273) [system] string(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _201170)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _201170)
   Call: (273) [system] compound(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _201170)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _201170)
^  Call: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Unify: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (274) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Fail: (274) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Fail: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _201170)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"=_201170
   Exit: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"=";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"
^  Exit: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (272) [apply] apply:maplist_([1737, 0], _201172, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1737, 0], [_239168|_239170], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1737, _239168)
^  Unify: (273) [user] mfix_vars1(1737, _239168)
   Call: (274) [system] var(1737)
^  Redo: (273) [user] mfix_vars1(1737, _239168)
^  Unify: (273) [user] mfix_vars1(1737, '$VAR'(_243814))
   Call: (274) [system] atom(1737)
^  Redo: (273) [user] mfix_vars1(1737, _239168)
^  Unify: (273) [user] mfix_vars1(1737, _239168)
   Call: (274) [system] 1737==true
^  Redo: (273) [user] mfix_vars1(1737, _239168)
^  Unify: (273) [user] mfix_vars1(1737, _239168)
   Call: (274) [system] 1737==false
^  Redo: (273) [user] mfix_vars1(1737, _239168)
^  Unify: (273) [user] mfix_vars1(1737, _239168)
   Call: (274) [system] 1737==[_253094, _253100]
^  Redo: (273) [user] mfix_vars1(1737, _239168)
^  Unify: (273) [user] mfix_vars1(1737, _239168)
   Call: (274) [system] is_list(1737)
^  Redo: (273) [user] mfix_vars1(1737, _239168)
^  Unify: (273) [user] mfix_vars1(1737, _239168)
   Call: (274) [system] string(1737)
^  Redo: (273) [user] mfix_vars1(1737, _239168)
^  Unify: (273) [user] mfix_vars1(1737, _239168)
   Call: (274) [system] compound(1737)
^  Redo: (273) [user] mfix_vars1(1737, _239168)
^  Unify: (273) [user] mfix_vars1(1737, _239168)
^  Call: (274) [user] symbol(1737)
^  Unify: (274) [user] symbol(1737)
   Call: (275) [system] atom(1737)
   Fail: (275) [system] atom(1737)
^  Fail: (274) [user] symbol(1737)
^  Redo: (273) [user] mfix_vars1(1737, _239168)
   Call: (274) [system] 1737=_239168
   Exit: (274) [system] 1737=1737
^  Exit: (273) [user] mfix_vars1(1737, 1737)
   Call: (273) [apply] apply:maplist_([0], _239170, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_273494|_273496], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _273494)
^  Unify: (274) [user] mfix_vars1(0, _273494)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _273494)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_278140))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _273494)
^  Unify: (274) [user] mfix_vars1(0, _273494)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _273494)
^  Unify: (274) [user] mfix_vars1(0, _273494)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _273494)
^  Unify: (274) [user] mfix_vars1(0, _273494)
   Call: (275) [system] 0==[_287420, _287426]
^  Redo: (274) [user] mfix_vars1(0, _273494)
^  Unify: (274) [user] mfix_vars1(0, _273494)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _273494)
^  Unify: (274) [user] mfix_vars1(0, _273494)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _273494)
^  Unify: (274) [user] mfix_vars1(0, _273494)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _273494)
^  Unify: (274) [user] mfix_vars1(0, _273494)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _273494)
   Call: (275) [system] 0=_273494
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _273496, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1737, 0], [1737, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0])
   Call: (270) [system] compound_name_arguments(_167668, '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _162082)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _323668))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _323668))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _323668))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _323668))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _323668)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _323668)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _329254))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _329254))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _329254)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _329254)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _329254)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _323668)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _156470))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _156470))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _156470))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _156470))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _156470)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _156470)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _351574))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _351574))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _351574)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _351574)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _351574)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _156470)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0)))
   Call: (261) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _380352, [], _380354)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _380352, [], _380354)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _380352, [], _380354)
   Call: (258) [system] atom('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _380352, [], _380354)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _380352, [], _380354)
   Call: (258) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), _389668, _389670)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0])
^  Call: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0], _391554, [], _380354)
^  Unify: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0], [], [])
   Call: (259) [system] var([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0])
^  Redo: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0], _391554, [], _380354)
^  Unify: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0], [_395290|_395292], [], _380354)
^  Call: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _395290, [], _396230)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
   Call: (260) [system] var(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _395290, [], _396230)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _395290, [], _396230)
   Call: (260) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _395290, [], _396230)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _395290, [], _396230)
   Call: (260) [system] compound(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _395290, [], _396230)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Exit: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Call: (259) [user] subst_vars([1737, 0], _395292, [], _380354)
^  Unify: (259) [user] subst_vars([1737, 0], [1737, 0], [], [])
   Call: (260) [system] var([1737, 0])
^  Redo: (259) [user] subst_vars([1737, 0], _395292, [], _380354)
^  Unify: (259) [user] subst_vars([1737, 0], [_411162|_411164], [], _380354)
^  Call: (260) [user] subst_vars(1737, _411162, [], _412102)
^  Unify: (260) [user] subst_vars(1737, 1737, [], [])
   Call: (261) [system] var(1737)
^  Redo: (260) [user] subst_vars(1737, _411162, [], _412102)
^  Unify: (260) [user] subst_vars(1737, _411162, [], _412102)
   Call: (261) [system] atom(1737)
^  Redo: (260) [user] subst_vars(1737, _411162, [], _412102)
^  Unify: (260) [user] subst_vars(1737, _411162, [], _412102)
   Call: (261) [system] compound(1737)
^  Redo: (260) [user] subst_vars(1737, _411162, [], _412102)
^  Unify: (260) [user] subst_vars(1737, 1737, [], [])
^  Exit: (260) [user] subst_vars(1737, 1737, [], [])
^  Call: (260) [user] subst_vars([0], _411164, [], _380354)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _411164, [], _380354)
^  Unify: (260) [user] subst_vars([0], [_427034|_427036], [], _380354)
^  Call: (261) [user] subst_vars(0, _427034, [], _427974)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _427034, [], _427974)
^  Unify: (261) [user] subst_vars(0, _427034, [], _427974)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _427034, [], _427974)
^  Unify: (261) [user] subst_vars(0, _427034, [], _427974)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _427034, [], _427974)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _427036, [], _380354)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _427036, [], _380354)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1737, 0], [1737, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0], [], [])
   Call: (258) [system] compound_name_arguments(_380352, '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), [], [])
   Call: (257) [system] _450392=metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1737, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1738, 0, 61856, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$stream_position'(61856, 1738, 0, 61890)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _503118))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _503118))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _503118)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _503118)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _503118)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _503118)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _508730))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _508730))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _508730))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _508730))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _508730)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _508730)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _514316))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _514316))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _514316)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _514316)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _514316)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _514316)
   Call: (270) [system] var('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _514316)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$VAR'(_521776))
   Call: (270) [system] atom('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _5986)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _5986)
   Call: (270) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _5986)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _5986)
   Call: (270) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _5986)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _5986)
   Call: (270) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0)==[_13124, _13130]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _5986)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _5986)
   Call: (270) [system] is_list('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _5986)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _5986)
   Call: (270) [system] string('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _5986)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _5986)
   Call: (270) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _23326, _23328)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1738, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     let parser = SExprParser::new(r#\"", 1738, 0], _27068)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let parser = SExprParser::new(r#\"", 1738, 0], _27068)
   Call: (271) [apply] apply:maplist_([";;     let parser = SExprParser::new(r#\"", 1738, 0], _27068, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     let parser = SExprParser::new(r#\"", 1738, 0], [_29886|_29888], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _29886)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _29886)
   Call: (273) [system] var(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _29886)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", '$VAR'(_34532))
   Call: (273) [system] atom(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _29886)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _29886)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""==true
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _29886)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _29886)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""==false
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _29886)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _29886)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""==[_43812, _43818]
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _29886)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _29886)
   Call: (273) [system] is_list(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _29886)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _29886)
   Call: (273) [system] string(";;     let parser = SExprParser::new(r#\"")
   Exit: (273) [system] string(";;     let parser = SExprParser::new(r#\"")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _29886)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _29886)
   Call: (273) [system] compound(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _29886)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _29886)
^  Call: (273) [user] symbol(";;     let parser = SExprParser::new(r#\"")
^  Unify: (273) [user] symbol(";;     let parser = SExprParser::new(r#\"")
   Call: (274) [system] atom(";;     let parser = SExprParser::new(r#\"")
   Fail: (274) [system] atom(";;     let parser = SExprParser::new(r#\"")
^  Fail: (273) [user] symbol(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _29886)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""=_29886
   Exit: (273) [system] ";;     let parser = SExprParser::new(r#\""=";;     let parser = SExprParser::new(r#\""
^  Exit: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"")
   Call: (272) [apply] apply:maplist_([1738, 0], _29888, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1738, 0], [_67884|_67886], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1738, _67884)
^  Unify: (273) [user] mfix_vars1(1738, _67884)
   Call: (274) [system] var(1738)
^  Redo: (273) [user] mfix_vars1(1738, _67884)
^  Unify: (273) [user] mfix_vars1(1738, '$VAR'(_72530))
   Call: (274) [system] atom(1738)
^  Redo: (273) [user] mfix_vars1(1738, _67884)
^  Unify: (273) [user] mfix_vars1(1738, _67884)
   Call: (274) [system] 1738==true
^  Redo: (273) [user] mfix_vars1(1738, _67884)
^  Unify: (273) [user] mfix_vars1(1738, _67884)
   Call: (274) [system] 1738==false
^  Redo: (273) [user] mfix_vars1(1738, _67884)
^  Unify: (273) [user] mfix_vars1(1738, _67884)
   Call: (274) [system] 1738==[_81810, _81816]
^  Redo: (273) [user] mfix_vars1(1738, _67884)
^  Unify: (273) [user] mfix_vars1(1738, _67884)
   Call: (274) [system] is_list(1738)
^  Redo: (273) [user] mfix_vars1(1738, _67884)
^  Unify: (273) [user] mfix_vars1(1738, _67884)
   Call: (274) [system] string(1738)
^  Redo: (273) [user] mfix_vars1(1738, _67884)
^  Unify: (273) [user] mfix_vars1(1738, _67884)
   Call: (274) [system] compound(1738)
^  Redo: (273) [user] mfix_vars1(1738, _67884)
^  Unify: (273) [user] mfix_vars1(1738, _67884)
^  Call: (274) [user] symbol(1738)
^  Unify: (274) [user] symbol(1738)
   Call: (275) [system] atom(1738)
   Fail: (275) [system] atom(1738)
^  Fail: (274) [user] symbol(1738)
^  Redo: (273) [user] mfix_vars1(1738, _67884)
   Call: (274) [system] 1738=_67884
   Exit: (274) [system] 1738=1738
^  Exit: (273) [user] mfix_vars1(1738, 1738)
   Call: (273) [apply] apply:maplist_([0], _67886, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_102210|_102212], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _102210)
^  Unify: (274) [user] mfix_vars1(0, _102210)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _102210)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_106856))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _102210)
^  Unify: (274) [user] mfix_vars1(0, _102210)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _102210)
^  Unify: (274) [user] mfix_vars1(0, _102210)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _102210)
^  Unify: (274) [user] mfix_vars1(0, _102210)
   Call: (275) [system] 0==[_116136, _116142]
^  Redo: (274) [user] mfix_vars1(0, _102210)
^  Unify: (274) [user] mfix_vars1(0, _102210)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _102210)
^  Unify: (274) [user] mfix_vars1(0, _102210)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _102210)
^  Unify: (274) [user] mfix_vars1(0, _102210)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _102210)
^  Unify: (274) [user] mfix_vars1(0, _102210)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _102210)
   Call: (275) [system] 0=_102210
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _102212, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1738, 0], [1738, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     let parser = SExprParser::new(r#\"", 1738, 0], [";;     let parser = SExprParser::new(r#\"", 1738, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let parser = SExprParser::new(r#\"", 1738, 0], [";;     let parser = SExprParser::new(r#\"", 1738, 0])
   Call: (270) [system] compound_name_arguments(_5986, '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1738, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1738, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0)))
   Call: (267) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _5972)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _152384))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _152384))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _152384))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _152384))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _152384)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _152384)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _157970))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _157970))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _157970)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _157970)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _157970)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0)))
   Call: (267) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _152384)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _5952))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _5952))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _5952))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _5952))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _5952)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _180290))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _180290))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _180290)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _180290)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _180290)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0)))
   Call: (267) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0)))
   Call: (261) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _209068, [], _209070)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _209068, [], _209070)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _209068, [], _209070)
   Call: (258) [system] atom('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _209068, [], _209070)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _209068, [], _209070)
   Call: (258) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), _218384, _218386)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1738, 0])
^  Call: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1738, 0], _220270, [], _209070)
^  Unify: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1738, 0], [";;     let parser = SExprParser::new(r#\"", 1738, 0], [], [])
   Call: (259) [system] var([";;     let parser = SExprParser::new(r#\"", 1738, 0])
^  Redo: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1738, 0], _220270, [], _209070)
^  Unify: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1738, 0], [_224006|_224008], [], _209070)
^  Call: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _224006, [], _224946)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"", [], [])
   Call: (260) [system] var(";;     let parser = SExprParser::new(r#\"")
^  Redo: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _224006, [], _224946)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _224006, [], _224946)
   Call: (260) [system] atom(";;     let parser = SExprParser::new(r#\"")
^  Redo: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _224006, [], _224946)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _224006, [], _224946)
   Call: (260) [system] compound(";;     let parser = SExprParser::new(r#\"")
^  Redo: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _224006, [], _224946)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"", [], [])
^  Exit: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"", [], [])
^  Call: (259) [user] subst_vars([1738, 0], _224008, [], _209070)
^  Unify: (259) [user] subst_vars([1738, 0], [1738, 0], [], [])
   Call: (260) [system] var([1738, 0])
^  Redo: (259) [user] subst_vars([1738, 0], _224008, [], _209070)
^  Unify: (259) [user] subst_vars([1738, 0], [_239878|_239880], [], _209070)
^  Call: (260) [user] subst_vars(1738, _239878, [], _240818)
^  Unify: (260) [user] subst_vars(1738, 1738, [], [])
   Call: (261) [system] var(1738)
^  Redo: (260) [user] subst_vars(1738, _239878, [], _240818)
^  Unify: (260) [user] subst_vars(1738, _239878, [], _240818)
   Call: (261) [system] atom(1738)
^  Redo: (260) [user] subst_vars(1738, _239878, [], _240818)
^  Unify: (260) [user] subst_vars(1738, _239878, [], _240818)
   Call: (261) [system] compound(1738)
^  Redo: (260) [user] subst_vars(1738, _239878, [], _240818)
^  Unify: (260) [user] subst_vars(1738, 1738, [], [])
^  Exit: (260) [user] subst_vars(1738, 1738, [], [])
^  Call: (260) [user] subst_vars([0], _239880, [], _209070)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _239880, [], _209070)
^  Unify: (260) [user] subst_vars([0], [_255750|_255752], [], _209070)
^  Call: (261) [user] subst_vars(0, _255750, [], _256690)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _255750, [], _256690)
^  Unify: (261) [user] subst_vars(0, _255750, [], _256690)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _255750, [], _256690)
^  Unify: (261) [user] subst_vars(0, _255750, [], _256690)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _255750, [], _256690)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _255752, [], _209070)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _255752, [], _209070)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1738, 0], [1738, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1738, 0], [";;     let parser = SExprParser::new(r#\"", 1738, 0], [], [])
   Call: (258) [system] compound_name_arguments(_209068, '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1738, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1738, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), [], [])
   Call: (257) [system] _279108=metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1738, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1739, 0, 61897, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$stream_position'(61897, 1739, 0, 61931)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _331832))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _331832))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _331832)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _331832)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _331832)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _331832)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _337444))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _337444))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _337444))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _337444))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _337444)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _337444)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _343030))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _343030))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _343030)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _343030)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _343030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _343030)
   Call: (270) [system] var('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _343030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$VAR'(_350490))
   Call: (270) [system] atom('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _343030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _343030)
   Call: (270) [system] '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _343030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _343030)
   Call: (270) [system] '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _343030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _343030)
   Call: (270) [system] '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0)==[_359770, _359776]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _343030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _343030)
   Call: (270) [system] is_list('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _343030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _343030)
   Call: (270) [system] string('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _343030)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _343030)
   Call: (270) [system] compound('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _369972, _369974)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT', [";;         (@doc some-func-no-type", 1739, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         (@doc some-func-no-type", 1739, 0], _373714)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (@doc some-func-no-type", 1739, 0], _373714)
   Call: (271) [apply] apply:maplist_([";;         (@doc some-func-no-type", 1739, 0], _373714, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         (@doc some-func-no-type", 1739, 0], [_376532|_376534], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         (@doc some-func-no-type", _376532)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func-no-type", _376532)
   Call: (273) [system] var(";;         (@doc some-func-no-type")
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func-no-type", _376532)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func-no-type", '$VAR'(_381178))
   Call: (273) [system] atom(";;         (@doc some-func-no-type")
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func-no-type", _376532)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func-no-type", _376532)
   Call: (273) [system] ";;         (@doc some-func-no-type"==true
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func-no-type", _376532)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func-no-type", _376532)
   Call: (273) [system] ";;         (@doc some-func-no-type"==false
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func-no-type", _376532)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func-no-type", _376532)
   Call: (273) [system] ";;         (@doc some-func-no-type"==[_390458, _390464]
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func-no-type", _376532)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func-no-type", _376532)
   Call: (273) [system] is_list(";;         (@doc some-func-no-type")
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func-no-type", _376532)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func-no-type", _376532)
   Call: (273) [system] string(";;         (@doc some-func-no-type")
   Exit: (273) [system] string(";;         (@doc some-func-no-type")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func-no-type", _376532)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func-no-type", _376532)
   Call: (273) [system] compound(";;         (@doc some-func-no-type")
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func-no-type", _376532)
^  Unify: (272) [user] mfix_vars1(";;         (@doc some-func-no-type", _376532)
^  Call: (273) [user] symbol(";;         (@doc some-func-no-type")
^  Unify: (273) [user] symbol(";;         (@doc some-func-no-type")
   Call: (274) [system] atom(";;         (@doc some-func-no-type")
   Fail: (274) [system] atom(";;         (@doc some-func-no-type")
^  Fail: (273) [user] symbol(";;         (@doc some-func-no-type")
^  Redo: (272) [user] mfix_vars1(";;         (@doc some-func-no-type", _376532)
   Call: (273) [system] ";;         (@doc some-func-no-type"=_376532
   Exit: (273) [system] ";;         (@doc some-func-no-type"=";;         (@doc some-func-no-type"
^  Exit: (272) [user] mfix_vars1(";;         (@doc some-func-no-type", ";;         (@doc some-func-no-type")
   Call: (272) [apply] apply:maplist_([1739, 0], _376534, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1739, 0], [_414530|_414532], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1739, _414530)
^  Unify: (273) [user] mfix_vars1(1739, _414530)
   Call: (274) [system] var(1739)
^  Redo: (273) [user] mfix_vars1(1739, _414530)
^  Unify: (273) [user] mfix_vars1(1739, '$VAR'(_419176))
   Call: (274) [system] atom(1739)
^  Redo: (273) [user] mfix_vars1(1739, _414530)
^  Unify: (273) [user] mfix_vars1(1739, _414530)
   Call: (274) [system] 1739==true
^  Redo: (273) [user] mfix_vars1(1739, _414530)
^  Unify: (273) [user] mfix_vars1(1739, _414530)
   Call: (274) [system] 1739==false
^  Redo: (273) [user] mfix_vars1(1739, _414530)
^  Unify: (273) [user] mfix_vars1(1739, _414530)
   Call: (274) [system] 1739==[_428456, _428462]
^  Redo: (273) [user] mfix_vars1(1739, _414530)
^  Unify: (273) [user] mfix_vars1(1739, _414530)
   Call: (274) [system] is_list(1739)
^  Redo: (273) [user] mfix_vars1(1739, _414530)
^  Unify: (273) [user] mfix_vars1(1739, _414530)
   Call: (274) [system] string(1739)
^  Redo: (273) [user] mfix_vars1(1739, _414530)
^  Unify: (273) [user] mfix_vars1(1739, _414530)
   Call: (274) [system] compound(1739)
^  Redo: (273) [user] mfix_vars1(1739, _414530)
^  Unify: (273) [user] mfix_vars1(1739, _414530)
^  Call: (274) [user] symbol(1739)
^  Unify: (274) [user] symbol(1739)
   Call: (275) [system] atom(1739)
   Fail: (275) [system] atom(1739)
^  Fail: (274) [user] symbol(1739)
^  Redo: (273) [user] mfix_vars1(1739, _414530)
   Call: (274) [system] 1739=_414530
   Exit: (274) [system] 1739=1739
^  Exit: (273) [user] mfix_vars1(1739, 1739)
   Call: (273) [apply] apply:maplist_([0], _414532, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_448856|_448858], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _448856)
^  Unify: (274) [user] mfix_vars1(0, _448856)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _448856)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_453502))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _448856)
^  Unify: (274) [user] mfix_vars1(0, _448856)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _448856)
^  Unify: (274) [user] mfix_vars1(0, _448856)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _448856)
^  Unify: (274) [user] mfix_vars1(0, _448856)
   Call: (275) [system] 0==[_462782, _462788]
^  Redo: (274) [user] mfix_vars1(0, _448856)
^  Unify: (274) [user] mfix_vars1(0, _448856)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _448856)
^  Unify: (274) [user] mfix_vars1(0, _448856)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _448856)
^  Unify: (274) [user] mfix_vars1(0, _448856)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _448856)
^  Unify: (274) [user] mfix_vars1(0, _448856)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _448856)
   Call: (275) [system] 0=_448856
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _448858, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1739, 0], [1739, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         (@doc some-func-no-type", 1739, 0], [";;         (@doc some-func-no-type", 1739, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         (@doc some-func-no-type", 1739, 0], [";;         (@doc some-func-no-type", 1739, 0])
   Call: (270) [system] compound_name_arguments(_343030, '$COMMENT', [";;         (@doc some-func-no-type", 1739, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT', [";;         (@doc some-func-no-type", 1739, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0)))
   Call: (267) [system] '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0)\=@='$COMMENT'(";;         (@doc some-func-no-type", 1739, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _337444)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _499030))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _499030))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _499030))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _499030))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _499030)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _499030)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _504616))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _504616))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _504616)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _504616)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _504616)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0)))
   Call: (267) [system] '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0)\=@='$COMMENT'(";;         (@doc some-func-no-type", 1739, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _499030)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _331832))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _331832))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _331832))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _8750))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _8750))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _8750)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _8750)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _8750)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0)))
   Call: (267) [system] '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0)\=@='$COMMENT'(";;         (@doc some-func-no-type", 1739, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0)))
   Call: (261) [system] '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0)\=@='$COMMENT'(";;         (@doc some-func-no-type", 1739, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _37528, [], _37530)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _37528, [], _37530)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _37528, [], _37530)
   Call: (258) [system] atom('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _37528, [], _37530)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _37528, [], _37530)
   Call: (258) [system] compound('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), _46844, _46846)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT', [";;         (@doc some-func-no-type", 1739, 0])
^  Call: (258) [user] subst_vars([";;         (@doc some-func-no-type", 1739, 0], _48730, [], _37530)
^  Unify: (258) [user] subst_vars([";;         (@doc some-func-no-type", 1739, 0], [";;         (@doc some-func-no-type", 1739, 0], [], [])
   Call: (259) [system] var([";;         (@doc some-func-no-type", 1739, 0])
^  Redo: (258) [user] subst_vars([";;         (@doc some-func-no-type", 1739, 0], _48730, [], _37530)
^  Unify: (258) [user] subst_vars([";;         (@doc some-func-no-type", 1739, 0], [_52466|_52468], [], _37530)
^  Call: (259) [user] subst_vars(";;         (@doc some-func-no-type", _52466, [], _53406)
^  Unify: (259) [user] subst_vars(";;         (@doc some-func-no-type", ";;         (@doc some-func-no-type", [], [])
   Call: (260) [system] var(";;         (@doc some-func-no-type")
^  Redo: (259) [user] subst_vars(";;         (@doc some-func-no-type", _52466, [], _53406)
^  Unify: (259) [user] subst_vars(";;         (@doc some-func-no-type", _52466, [], _53406)
   Call: (260) [system] atom(";;         (@doc some-func-no-type")
^  Redo: (259) [user] subst_vars(";;         (@doc some-func-no-type", _52466, [], _53406)
^  Unify: (259) [user] subst_vars(";;         (@doc some-func-no-type", _52466, [], _53406)
   Call: (260) [system] compound(";;         (@doc some-func-no-type")
^  Redo: (259) [user] subst_vars(";;         (@doc some-func-no-type", _52466, [], _53406)
^  Unify: (259) [user] subst_vars(";;         (@doc some-func-no-type", ";;         (@doc some-func-no-type", [], [])
^  Exit: (259) [user] subst_vars(";;         (@doc some-func-no-type", ";;         (@doc some-func-no-type", [], [])
^  Call: (259) [user] subst_vars([1739, 0], _52468, [], _37530)
^  Unify: (259) [user] subst_vars([1739, 0], [1739, 0], [], [])
   Call: (260) [system] var([1739, 0])
^  Redo: (259) [user] subst_vars([1739, 0], _52468, [], _37530)
^  Unify: (259) [user] subst_vars([1739, 0], [_68338|_68340], [], _37530)
^  Call: (260) [user] subst_vars(1739, _68338, [], _69278)
^  Unify: (260) [user] subst_vars(1739, 1739, [], [])
   Call: (261) [system] var(1739)
^  Redo: (260) [user] subst_vars(1739, _68338, [], _69278)
^  Unify: (260) [user] subst_vars(1739, _68338, [], _69278)
   Call: (261) [system] atom(1739)
^  Redo: (260) [user] subst_vars(1739, _68338, [], _69278)
^  Unify: (260) [user] subst_vars(1739, _68338, [], _69278)
   Call: (261) [system] compound(1739)
^  Redo: (260) [user] subst_vars(1739, _68338, [], _69278)
^  Unify: (260) [user] subst_vars(1739, 1739, [], [])
^  Exit: (260) [user] subst_vars(1739, 1739, [], [])
^  Call: (260) [user] subst_vars([0], _68340, [], _37530)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _68340, [], _37530)
^  Unify: (260) [user] subst_vars([0], [_84210|_84212], [], _37530)
^  Call: (261) [user] subst_vars(0, _84210, [], _85150)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _84210, [], _85150)
^  Unify: (261) [user] subst_vars(0, _84210, [], _85150)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _84210, [], _85150)
^  Unify: (261) [user] subst_vars(0, _84210, [], _85150)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _84210, [], _85150)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _84212, [], _37530)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _84212, [], _37530)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1739, 0], [1739, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         (@doc some-func-no-type", 1739, 0], [";;         (@doc some-func-no-type", 1739, 0], [], [])
   Call: (258) [system] compound_name_arguments(_37528, '$COMMENT', [";;         (@doc some-func-no-type", 1739, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT', [";;         (@doc some-func-no-type", 1739, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), [], [])
   Call: (257) [system] _107568=metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         (@doc some-func-no-type", 1739, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1740, 0, 61932, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$stream_position'(61932, 1740, 0, 61966)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _160292))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _160292))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _160292)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _160292)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _160292)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _160292)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _165904))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _165904))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _165904))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _165904))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _165904)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _165904)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _171490))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _171490))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _171490)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _171490)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _171490)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _171490)
   Call: (270) [system] var('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _171490)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$VAR'(_178950))
   Call: (270) [system] atom('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _171490)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _171490)
   Call: (270) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _171490)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _171490)
   Call: (270) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _171490)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _171490)
   Call: (270) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0)==[_188230, _188236]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _171490)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _171490)
   Call: (270) [system] is_list('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _171490)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _171490)
   Call: (270) [system] string('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _171490)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _171490)
   Call: (270) [system] compound('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
   Exit: (270) [system] compound('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _198432, _198434)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT', [";;           (@desc \"Test function\")", 1740, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;           (@desc \"Test function\")", 1740, 0], _202174)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@desc \"Test function\")", 1740, 0], _202174)
   Call: (271) [apply] apply:maplist_([";;           (@desc \"Test function\")", 1740, 0], _202174, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;           (@desc \"Test function\")", 1740, 0], [_204992|_204994], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _204992)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _204992)
   Call: (273) [system] var(";;           (@desc \"Test function\")")
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _204992)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", '$VAR'(_209638))
   Call: (273) [system] atom(";;           (@desc \"Test function\")")
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _204992)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _204992)
   Call: (273) [system] ";;           (@desc \"Test function\")"==true
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _204992)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _204992)
   Call: (273) [system] ";;           (@desc \"Test function\")"==false
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _204992)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _204992)
   Call: (273) [system] ";;           (@desc \"Test function\")"==[_218918, _218924]
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _204992)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _204992)
   Call: (273) [system] is_list(";;           (@desc \"Test function\")")
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _204992)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _204992)
   Call: (273) [system] string(";;           (@desc \"Test function\")")
   Exit: (273) [system] string(";;           (@desc \"Test function\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _204992)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _204992)
   Call: (273) [system] compound(";;           (@desc \"Test function\")")
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _204992)
^  Unify: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _204992)
^  Call: (273) [user] symbol(";;           (@desc \"Test function\")")
^  Unify: (273) [user] symbol(";;           (@desc \"Test function\")")
   Call: (274) [system] atom(";;           (@desc \"Test function\")")
   Fail: (274) [system] atom(";;           (@desc \"Test function\")")
^  Fail: (273) [user] symbol(";;           (@desc \"Test function\")")
^  Redo: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", _204992)
   Call: (273) [system] ";;           (@desc \"Test function\")"=_204992
   Exit: (273) [system] ";;           (@desc \"Test function\")"=";;           (@desc \"Test function\")"
^  Exit: (272) [user] mfix_vars1(";;           (@desc \"Test function\")", ";;           (@desc \"Test function\")")
   Call: (272) [apply] apply:maplist_([1740, 0], _204994, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1740, 0], [_242990|_242992], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1740, _242990)
^  Unify: (273) [user] mfix_vars1(1740, _242990)
   Call: (274) [system] var(1740)
^  Redo: (273) [user] mfix_vars1(1740, _242990)
^  Unify: (273) [user] mfix_vars1(1740, '$VAR'(_247636))
   Call: (274) [system] atom(1740)
^  Redo: (273) [user] mfix_vars1(1740, _242990)
^  Unify: (273) [user] mfix_vars1(1740, _242990)
   Call: (274) [system] 1740==true
^  Redo: (273) [user] mfix_vars1(1740, _242990)
^  Unify: (273) [user] mfix_vars1(1740, _242990)
   Call: (274) [system] 1740==false
^  Redo: (273) [user] mfix_vars1(1740, _242990)
^  Unify: (273) [user] mfix_vars1(1740, _242990)
   Call: (274) [system] 1740==[_256916, _256922]
^  Redo: (273) [user] mfix_vars1(1740, _242990)
^  Unify: (273) [user] mfix_vars1(1740, _242990)
   Call: (274) [system] is_list(1740)
^  Redo: (273) [user] mfix_vars1(1740, _242990)
^  Unify: (273) [user] mfix_vars1(1740, _242990)
   Call: (274) [system] string(1740)
^  Redo: (273) [user] mfix_vars1(1740, _242990)
^  Unify: (273) [user] mfix_vars1(1740, _242990)
   Call: (274) [system] compound(1740)
^  Redo: (273) [user] mfix_vars1(1740, _242990)
^  Unify: (273) [user] mfix_vars1(1740, _242990)
^  Call: (274) [user] symbol(1740)
^  Unify: (274) [user] symbol(1740)
   Call: (275) [system] atom(1740)
   Fail: (275) [system] atom(1740)
^  Fail: (274) [user] symbol(1740)
^  Redo: (273) [user] mfix_vars1(1740, _242990)
   Call: (274) [system] 1740=_242990
   Exit: (274) [system] 1740=1740
^  Exit: (273) [user] mfix_vars1(1740, 1740)
   Call: (273) [apply] apply:maplist_([0], _242992, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_277316|_277318], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _277316)
^  Unify: (274) [user] mfix_vars1(0, _277316)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _277316)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_281962))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _277316)
^  Unify: (274) [user] mfix_vars1(0, _277316)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _277316)
^  Unify: (274) [user] mfix_vars1(0, _277316)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _277316)
^  Unify: (274) [user] mfix_vars1(0, _277316)
   Call: (275) [system] 0==[_291242, _291248]
^  Redo: (274) [user] mfix_vars1(0, _277316)
^  Unify: (274) [user] mfix_vars1(0, _277316)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _277316)
^  Unify: (274) [user] mfix_vars1(0, _277316)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _277316)
^  Unify: (274) [user] mfix_vars1(0, _277316)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _277316)
^  Unify: (274) [user] mfix_vars1(0, _277316)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _277316)
   Call: (275) [system] 0=_277316
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _277318, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1740, 0], [1740, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;           (@desc \"Test function\")", 1740, 0], [";;           (@desc \"Test function\")", 1740, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@desc \"Test function\")", 1740, 0], [";;           (@desc \"Test function\")", 1740, 0])
   Call: (270) [system] compound_name_arguments(_171490, '$COMMENT', [";;           (@desc \"Test function\")", 1740, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT', [";;           (@desc \"Test function\")", 1740, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0)\=@='$COMMENT'(";;           (@desc \"Test function\")", 1740, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _165904)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _327490))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _327490))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _327490))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _327490))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _327490)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _327490)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _333076))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _333076))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _333076)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _333076)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _333076)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0)\=@='$COMMENT'(";;           (@desc \"Test function\")", 1740, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _327490)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _160292))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _160292))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _160292))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _160292))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _160292)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _160292)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _355396))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _355396))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _355396)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _355396)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _355396)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0)\=@='$COMMENT'(";;           (@desc \"Test function\")", 1740, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _160292)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0)))
   Call: (261) [system] '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0)\=@='$COMMENT'(";;           (@desc \"Test function\")", 1740, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _384174, [], _384176)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _384174, [], _384176)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _384174, [], _384176)
   Call: (258) [system] atom('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _384174, [], _384176)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _384174, [], _384176)
   Call: (258) [system] compound('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
   Exit: (258) [system] compound('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), _393490, _393492)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT', [";;           (@desc \"Test function\")", 1740, 0])
^  Call: (258) [user] subst_vars([";;           (@desc \"Test function\")", 1740, 0], _395376, [], _384176)
^  Unify: (258) [user] subst_vars([";;           (@desc \"Test function\")", 1740, 0], [";;           (@desc \"Test function\")", 1740, 0], [], [])
   Call: (259) [system] var([";;           (@desc \"Test function\")", 1740, 0])
^  Redo: (258) [user] subst_vars([";;           (@desc \"Test function\")", 1740, 0], _395376, [], _384176)
^  Unify: (258) [user] subst_vars([";;           (@desc \"Test function\")", 1740, 0], [_399112|_399114], [], _384176)
^  Call: (259) [user] subst_vars(";;           (@desc \"Test function\")", _399112, [], _400052)
^  Unify: (259) [user] subst_vars(";;           (@desc \"Test function\")", ";;           (@desc \"Test function\")", [], [])
   Call: (260) [system] var(";;           (@desc \"Test function\")")
^  Redo: (259) [user] subst_vars(";;           (@desc \"Test function\")", _399112, [], _400052)
^  Unify: (259) [user] subst_vars(";;           (@desc \"Test function\")", _399112, [], _400052)
   Call: (260) [system] atom(";;           (@desc \"Test function\")")
^  Redo: (259) [user] subst_vars(";;           (@desc \"Test function\")", _399112, [], _400052)
^  Unify: (259) [user] subst_vars(";;           (@desc \"Test function\")", _399112, [], _400052)
   Call: (260) [system] compound(";;           (@desc \"Test function\")")
^  Redo: (259) [user] subst_vars(";;           (@desc \"Test function\")", _399112, [], _400052)
^  Unify: (259) [user] subst_vars(";;           (@desc \"Test function\")", ";;           (@desc \"Test function\")", [], [])
^  Exit: (259) [user] subst_vars(";;           (@desc \"Test function\")", ";;           (@desc \"Test function\")", [], [])
^  Call: (259) [user] subst_vars([1740, 0], _399114, [], _384176)
^  Unify: (259) [user] subst_vars([1740, 0], [1740, 0], [], [])
   Call: (260) [system] var([1740, 0])
^  Redo: (259) [user] subst_vars([1740, 0], _399114, [], _384176)
^  Unify: (259) [user] subst_vars([1740, 0], [_414984|_414986], [], _384176)
^  Call: (260) [user] subst_vars(1740, _414984, [], _415924)
^  Unify: (260) [user] subst_vars(1740, 1740, [], [])
   Call: (261) [system] var(1740)
^  Redo: (260) [user] subst_vars(1740, _414984, [], _415924)
^  Unify: (260) [user] subst_vars(1740, _414984, [], _415924)
   Call: (261) [system] atom(1740)
^  Redo: (260) [user] subst_vars(1740, _414984, [], _415924)
^  Unify: (260) [user] subst_vars(1740, _414984, [], _415924)
   Call: (261) [system] compound(1740)
^  Redo: (260) [user] subst_vars(1740, _414984, [], _415924)
^  Unify: (260) [user] subst_vars(1740, 1740, [], [])
^  Exit: (260) [user] subst_vars(1740, 1740, [], [])
^  Call: (260) [user] subst_vars([0], _414986, [], _384176)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _414986, [], _384176)
^  Unify: (260) [user] subst_vars([0], [_430856|_430858], [], _384176)
^  Call: (261) [user] subst_vars(0, _430856, [], _431796)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _430856, [], _431796)
^  Unify: (261) [user] subst_vars(0, _430856, [], _431796)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _430856, [], _431796)
^  Unify: (261) [user] subst_vars(0, _430856, [], _431796)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _430856, [], _431796)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _430858, [], _384176)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _430858, [], _384176)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1740, 0], [1740, 0], [], [])
^  Exit: (258) [user] subst_vars([";;           (@desc \"Test function\")", 1740, 0], [";;           (@desc \"Test function\")", 1740, 0], [], [])
   Call: (258) [system] compound_name_arguments(_384174, '$COMMENT', [";;           (@desc \"Test function\")", 1740, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT', [";;           (@desc \"Test function\")", 1740, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), [], [])
   Call: (257) [system] _454214=metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@desc \"Test function\")", 1740, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1741, 0, 61969, '$COMMENT'(";;           (@params (", 1741, 0), '$stream_position'(61969, 1741, 0, 62003)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@params (", 1741, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@params (", 1741, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;           (@params (", 1741, 0), _506936))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@params (", 1741, 0), _506936))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;           (@params (", 1741, 0), _506936)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@params (", 1741, 0), _506936)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;           (@params (", 1741, 0), _506936)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;           (@params (", 1741, 0), _506936)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1741, 0), _512548))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1741, 0), _512548))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1741, 0), _512548))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1741, 0), _512548))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1741, 0), _512548)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1741, 0), _512548)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;           (@params (", 1741, 0), _518134))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@params (", 1741, 0), _518134))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;           (@params (", 1741, 0), _518134)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@params (", 1741, 0), _518134)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1741, 0), _518134)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1741, 0), _518134)
   Call: (270) [system] var('$COMMENT'(";;           (@params (", 1741, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1741, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1741, 0), '$VAR'(_7670))
   Call: (270) [system] atom('$COMMENT'(";;           (@params (", 1741, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1741, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1741, 0), _5982)
   Call: (270) [system] '$COMMENT'(";;           (@params (", 1741, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1741, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1741, 0), _5982)
   Call: (270) [system] '$COMMENT'(";;           (@params (", 1741, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1741, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1741, 0), _5982)
   Call: (270) [system] '$COMMENT'(";;           (@params (", 1741, 0)==[_16950, _16956]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1741, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1741, 0), _5982)
   Call: (270) [system] is_list('$COMMENT'(";;           (@params (", 1741, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1741, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1741, 0), _5982)
   Call: (270) [system] string('$COMMENT'(";;           (@params (", 1741, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1741, 0), _5982)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1741, 0), _5982)
   Call: (270) [system] compound('$COMMENT'(";;           (@params (", 1741, 0))
   Exit: (270) [system] compound('$COMMENT'(";;           (@params (", 1741, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1741, 0), _27152, _27154)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT', [";;           (@params (", 1741, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;           (@params (", 1741, 0], _30894)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@params (", 1741, 0], _30894)
   Call: (271) [apply] apply:maplist_([";;           (@params (", 1741, 0], _30894, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;           (@params (", 1741, 0], [_33712|_33714], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;           (@params (", _33712)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _33712)
   Call: (273) [system] var(";;           (@params (")
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _33712)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", '$VAR'(_38358))
   Call: (273) [system] atom(";;           (@params (")
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _33712)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _33712)
   Call: (273) [system] ";;           (@params ("==true
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _33712)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _33712)
   Call: (273) [system] ";;           (@params ("==false
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _33712)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _33712)
   Call: (273) [system] ";;           (@params ("==[_47638, _47644]
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _33712)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _33712)
   Call: (273) [system] is_list(";;           (@params (")
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _33712)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _33712)
   Call: (273) [system] string(";;           (@params (")
   Exit: (273) [system] string(";;           (@params (")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _33712)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _33712)
   Call: (273) [system] compound(";;           (@params (")
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _33712)
^  Unify: (272) [user] mfix_vars1(";;           (@params (", _33712)
^  Call: (273) [user] symbol(";;           (@params (")
^  Unify: (273) [user] symbol(";;           (@params (")
   Call: (274) [system] atom(";;           (@params (")
   Fail: (274) [system] atom(";;           (@params (")
^  Fail: (273) [user] symbol(";;           (@params (")
^  Redo: (272) [user] mfix_vars1(";;           (@params (", _33712)
   Call: (273) [system] ";;           (@params ("=_33712
   Exit: (273) [system] ";;           (@params ("=";;           (@params ("
^  Exit: (272) [user] mfix_vars1(";;           (@params (", ";;           (@params (")
   Call: (272) [apply] apply:maplist_([1741, 0], _33714, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1741, 0], [_71710|_71712], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1741, _71710)
^  Unify: (273) [user] mfix_vars1(1741, _71710)
   Call: (274) [system] var(1741)
^  Redo: (273) [user] mfix_vars1(1741, _71710)
^  Unify: (273) [user] mfix_vars1(1741, '$VAR'(_76356))
   Call: (274) [system] atom(1741)
^  Redo: (273) [user] mfix_vars1(1741, _71710)
^  Unify: (273) [user] mfix_vars1(1741, _71710)
   Call: (274) [system] 1741==true
^  Redo: (273) [user] mfix_vars1(1741, _71710)
^  Unify: (273) [user] mfix_vars1(1741, _71710)
   Call: (274) [system] 1741==false
^  Redo: (273) [user] mfix_vars1(1741, _71710)
^  Unify: (273) [user] mfix_vars1(1741, _71710)
   Call: (274) [system] 1741==[_85636, _85642]
^  Redo: (273) [user] mfix_vars1(1741, _71710)
^  Unify: (273) [user] mfix_vars1(1741, _71710)
   Call: (274) [system] is_list(1741)
^  Redo: (273) [user] mfix_vars1(1741, _71710)
^  Unify: (273) [user] mfix_vars1(1741, _71710)
   Call: (274) [system] string(1741)
^  Redo: (273) [user] mfix_vars1(1741, _71710)
^  Unify: (273) [user] mfix_vars1(1741, _71710)
   Call: (274) [system] compound(1741)
^  Redo: (273) [user] mfix_vars1(1741, _71710)
^  Unify: (273) [user] mfix_vars1(1741, _71710)
^  Call: (274) [user] symbol(1741)
^  Unify: (274) [user] symbol(1741)
   Call: (275) [system] atom(1741)
   Fail: (275) [system] atom(1741)
^  Fail: (274) [user] symbol(1741)
^  Redo: (273) [user] mfix_vars1(1741, _71710)
   Call: (274) [system] 1741=_71710
   Exit: (274) [system] 1741=1741
^  Exit: (273) [user] mfix_vars1(1741, 1741)
   Call: (273) [apply] apply:maplist_([0], _71712, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_106036|_106038], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _106036)
^  Unify: (274) [user] mfix_vars1(0, _106036)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _106036)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_110682))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _106036)
^  Unify: (274) [user] mfix_vars1(0, _106036)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _106036)
^  Unify: (274) [user] mfix_vars1(0, _106036)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _106036)
^  Unify: (274) [user] mfix_vars1(0, _106036)
   Call: (275) [system] 0==[_119962, _119968]
^  Redo: (274) [user] mfix_vars1(0, _106036)
^  Unify: (274) [user] mfix_vars1(0, _106036)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _106036)
^  Unify: (274) [user] mfix_vars1(0, _106036)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _106036)
^  Unify: (274) [user] mfix_vars1(0, _106036)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _106036)
^  Unify: (274) [user] mfix_vars1(0, _106036)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _106036)
   Call: (275) [system] 0=_106036
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _106038, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1741, 0], [1741, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;           (@params (", 1741, 0], [";;           (@params (", 1741, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@params (", 1741, 0], [";;           (@params (", 1741, 0])
   Call: (270) [system] compound_name_arguments(_5982, '$COMMENT', [";;           (@params (", 1741, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT', [";;           (@params (", 1741, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@params (", 1741, 0)\=@='$COMMENT'(";;           (@params (", 1741, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1741, 0), _5968)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;           (@params (", 1741, 0), _156210))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@params (", 1741, 0), _156210))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;           (@params (", 1741, 0), _156210))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@params (", 1741, 0), _156210))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@params (", 1741, 0), _156210)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@params (", 1741, 0), _156210)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;           (@params (", 1741, 0), _161796))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@params (", 1741, 0), _161796))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;           (@params (", 1741, 0), _161796)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@params (", 1741, 0), _161796)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;           (@params (", 1741, 0), _161796)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@params (", 1741, 0)\=@='$COMMENT'(";;           (@params (", 1741, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@params (", 1741, 0), _156210)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;           (@params (", 1741, 0), _5948))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@params (", 1741, 0), _5948))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;           (@params (", 1741, 0), _5948))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@params (", 1741, 0), _5948))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@params (", 1741, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@params (", 1741, 0), _5948)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;           (@params (", 1741, 0), _184116))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@params (", 1741, 0), _184116))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;           (@params (", 1741, 0), _184116)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@params (", 1741, 0), _184116)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;           (@params (", 1741, 0), _184116)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@params (", 1741, 0)\=@='$COMMENT'(";;           (@params (", 1741, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@params (", 1741, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0)))
   Call: (261) [system] '$COMMENT'(";;           (@params (", 1741, 0)\=@='$COMMENT'(";;           (@params (", 1741, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@params (", 1741, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1741, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1741, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1741, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1741, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1741, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;           (@params (", 1741, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1741, 0), _212894, [], _212896)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;           (@params (", 1741, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1741, 0), _212894, [], _212896)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1741, 0), _212894, [], _212896)
   Call: (258) [system] atom('$COMMENT'(";;           (@params (", 1741, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1741, 0), _212894, [], _212896)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1741, 0), _212894, [], _212896)
   Call: (258) [system] compound('$COMMENT'(";;           (@params (", 1741, 0))
   Exit: (258) [system] compound('$COMMENT'(";;           (@params (", 1741, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1741, 0), _222210, _222212)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT', [";;           (@params (", 1741, 0])
^  Call: (258) [user] subst_vars([";;           (@params (", 1741, 0], _224096, [], _212896)
^  Unify: (258) [user] subst_vars([";;           (@params (", 1741, 0], [";;           (@params (", 1741, 0], [], [])
   Call: (259) [system] var([";;           (@params (", 1741, 0])
^  Redo: (258) [user] subst_vars([";;           (@params (", 1741, 0], _224096, [], _212896)
^  Unify: (258) [user] subst_vars([";;           (@params (", 1741, 0], [_227832|_227834], [], _212896)
^  Call: (259) [user] subst_vars(";;           (@params (", _227832, [], _228772)
^  Unify: (259) [user] subst_vars(";;           (@params (", ";;           (@params (", [], [])
   Call: (260) [system] var(";;           (@params (")
^  Redo: (259) [user] subst_vars(";;           (@params (", _227832, [], _228772)
^  Unify: (259) [user] subst_vars(";;           (@params (", _227832, [], _228772)
   Call: (260) [system] atom(";;           (@params (")
^  Redo: (259) [user] subst_vars(";;           (@params (", _227832, [], _228772)
^  Unify: (259) [user] subst_vars(";;           (@params (", _227832, [], _228772)
   Call: (260) [system] compound(";;           (@params (")
^  Redo: (259) [user] subst_vars(";;           (@params (", _227832, [], _228772)
^  Unify: (259) [user] subst_vars(";;           (@params (", ";;           (@params (", [], [])
^  Exit: (259) [user] subst_vars(";;           (@params (", ";;           (@params (", [], [])
^  Call: (259) [user] subst_vars([1741, 0], _227834, [], _212896)
^  Unify: (259) [user] subst_vars([1741, 0], [1741, 0], [], [])
   Call: (260) [system] var([1741, 0])
^  Redo: (259) [user] subst_vars([1741, 0], _227834, [], _212896)
^  Unify: (259) [user] subst_vars([1741, 0], [_243704|_243706], [], _212896)
^  Call: (260) [user] subst_vars(1741, _243704, [], _244644)
^  Unify: (260) [user] subst_vars(1741, 1741, [], [])
   Call: (261) [system] var(1741)
^  Redo: (260) [user] subst_vars(1741, _243704, [], _244644)
^  Unify: (260) [user] subst_vars(1741, _243704, [], _244644)
   Call: (261) [system] atom(1741)
^  Redo: (260) [user] subst_vars(1741, _243704, [], _244644)
^  Unify: (260) [user] subst_vars(1741, _243704, [], _244644)
   Call: (261) [system] compound(1741)
^  Redo: (260) [user] subst_vars(1741, _243704, [], _244644)
^  Unify: (260) [user] subst_vars(1741, 1741, [], [])
^  Exit: (260) [user] subst_vars(1741, 1741, [], [])
^  Call: (260) [user] subst_vars([0], _243706, [], _212896)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _243706, [], _212896)
^  Unify: (260) [user] subst_vars([0], [_259576|_259578], [], _212896)
^  Call: (261) [user] subst_vars(0, _259576, [], _260516)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _259576, [], _260516)
^  Unify: (261) [user] subst_vars(0, _259576, [], _260516)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _259576, [], _260516)
^  Unify: (261) [user] subst_vars(0, _259576, [], _260516)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _259576, [], _260516)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _259578, [], _212896)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _259578, [], _212896)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1741, 0], [1741, 0], [], [])
^  Exit: (258) [user] subst_vars([";;           (@params (", 1741, 0], [";;           (@params (", 1741, 0], [], [])
   Call: (258) [system] compound_name_arguments(_212894, '$COMMENT', [";;           (@params (", 1741, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT', [";;           (@params (", 1741, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;           (@params (", 1741, 0), '$COMMENT'(";;           (@params (", 1741, 0), [], [])
   Call: (257) [system] _282934=metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1741, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1741, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1741, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1741, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1741, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1741, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1741, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1741, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@params (", 1741, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1742, 0, 61993, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$stream_position'(61993, 1742, 0, 62027)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _335660))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _335660))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _335660)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _335660)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _335660)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _335660)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _341272))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _341272))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _341272))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _341272))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _341272)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _341272)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _346858))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _346858))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _346858)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _346858)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _346858)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _346858)
   Call: (270) [system] var('$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _346858)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$VAR'(_354318))
   Call: (270) [system] atom('$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _346858)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _346858)
   Call: (270) [system] '$COMMENT'(";;             (@param \"First argument\")", 1742, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _346858)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _346858)
   Call: (270) [system] '$COMMENT'(";;             (@param \"First argument\")", 1742, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _346858)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _346858)
   Call: (270) [system] '$COMMENT'(";;             (@param \"First argument\")", 1742, 0)==[_363598, _363604]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _346858)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _346858)
   Call: (270) [system] is_list('$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _346858)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _346858)
   Call: (270) [system] string('$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _346858)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _346858)
   Call: (270) [system] compound('$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _373800, _373802)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT', [";;             (@param \"First argument\")", 1742, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (@param \"First argument\")", 1742, 0], _377542)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (@param \"First argument\")", 1742, 0], _377542)
   Call: (271) [apply] apply:maplist_([";;             (@param \"First argument\")", 1742, 0], _377542, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (@param \"First argument\")", 1742, 0], [_380360|_380362], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _380360)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _380360)
   Call: (273) [system] var(";;             (@param \"First argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _380360)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", '$VAR'(_385006))
   Call: (273) [system] atom(";;             (@param \"First argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _380360)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _380360)
   Call: (273) [system] ";;             (@param \"First argument\")"==true
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _380360)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _380360)
   Call: (273) [system] ";;             (@param \"First argument\")"==false
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _380360)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _380360)
   Call: (273) [system] ";;             (@param \"First argument\")"==[_394286, _394292]
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _380360)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _380360)
   Call: (273) [system] is_list(";;             (@param \"First argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _380360)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _380360)
   Call: (273) [system] string(";;             (@param \"First argument\")")
   Exit: (273) [system] string(";;             (@param \"First argument\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _380360)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _380360)
   Call: (273) [system] compound(";;             (@param \"First argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _380360)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _380360)
^  Call: (273) [user] symbol(";;             (@param \"First argument\")")
^  Unify: (273) [user] symbol(";;             (@param \"First argument\")")
   Call: (274) [system] atom(";;             (@param \"First argument\")")
   Fail: (274) [system] atom(";;             (@param \"First argument\")")
^  Fail: (273) [user] symbol(";;             (@param \"First argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"First argument\")", _380360)
   Call: (273) [system] ";;             (@param \"First argument\")"=_380360
   Exit: (273) [system] ";;             (@param \"First argument\")"=";;             (@param \"First argument\")"
^  Exit: (272) [user] mfix_vars1(";;             (@param \"First argument\")", ";;             (@param \"First argument\")")
   Call: (272) [apply] apply:maplist_([1742, 0], _380362, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1742, 0], [_418358|_418360], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1742, _418358)
^  Unify: (273) [user] mfix_vars1(1742, _418358)
   Call: (274) [system] var(1742)
^  Redo: (273) [user] mfix_vars1(1742, _418358)
^  Unify: (273) [user] mfix_vars1(1742, '$VAR'(_423004))
   Call: (274) [system] atom(1742)
^  Redo: (273) [user] mfix_vars1(1742, _418358)
^  Unify: (273) [user] mfix_vars1(1742, _418358)
   Call: (274) [system] 1742==true
^  Redo: (273) [user] mfix_vars1(1742, _418358)
^  Unify: (273) [user] mfix_vars1(1742, _418358)
   Call: (274) [system] 1742==false
^  Redo: (273) [user] mfix_vars1(1742, _418358)
^  Unify: (273) [user] mfix_vars1(1742, _418358)
   Call: (274) [system] 1742==[_432284, _432290]
^  Redo: (273) [user] mfix_vars1(1742, _418358)
^  Unify: (273) [user] mfix_vars1(1742, _418358)
   Call: (274) [system] is_list(1742)
^  Redo: (273) [user] mfix_vars1(1742, _418358)
^  Unify: (273) [user] mfix_vars1(1742, _418358)
   Call: (274) [system] string(1742)
^  Redo: (273) [user] mfix_vars1(1742, _418358)
^  Unify: (273) [user] mfix_vars1(1742, _418358)
   Call: (274) [system] compound(1742)
^  Redo: (273) [user] mfix_vars1(1742, _418358)
^  Unify: (273) [user] mfix_vars1(1742, _418358)
^  Call: (274) [user] symbol(1742)
^  Unify: (274) [user] symbol(1742)
   Call: (275) [system] atom(1742)
   Fail: (275) [system] atom(1742)
^  Fail: (274) [user] symbol(1742)
^  Redo: (273) [user] mfix_vars1(1742, _418358)
   Call: (274) [system] 1742=_418358
   Exit: (274) [system] 1742=1742
^  Exit: (273) [user] mfix_vars1(1742, 1742)
   Call: (273) [apply] apply:maplist_([0], _418360, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_452684|_452686], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _452684)
^  Unify: (274) [user] mfix_vars1(0, _452684)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _452684)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_457330))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _452684)
^  Unify: (274) [user] mfix_vars1(0, _452684)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _452684)
^  Unify: (274) [user] mfix_vars1(0, _452684)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _452684)
^  Unify: (274) [user] mfix_vars1(0, _452684)
   Call: (275) [system] 0==[_466610, _466616]
^  Redo: (274) [user] mfix_vars1(0, _452684)
^  Unify: (274) [user] mfix_vars1(0, _452684)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _452684)
^  Unify: (274) [user] mfix_vars1(0, _452684)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _452684)
^  Unify: (274) [user] mfix_vars1(0, _452684)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _452684)
^  Unify: (274) [user] mfix_vars1(0, _452684)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _452684)
   Call: (275) [system] 0=_452684
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _452686, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1742, 0], [1742, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (@param \"First argument\")", 1742, 0], [";;             (@param \"First argument\")", 1742, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (@param \"First argument\")", 1742, 0], [";;             (@param \"First argument\")", 1742, 0])
   Call: (270) [system] compound_name_arguments(_346858, '$COMMENT', [";;             (@param \"First argument\")", 1742, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT', [";;             (@param \"First argument\")", 1742, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"First argument\")", 1742, 0)\=@='$COMMENT'(";;             (@param \"First argument\")", 1742, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _341272)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _502858))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _502858))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _502858))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _502858))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _502858)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _502858)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _508444))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _508444))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _508444)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _508444)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _508444)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"First argument\")", 1742, 0)\=@='$COMMENT'(";;             (@param \"First argument\")", 1742, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _502858)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _5952))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _5952))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _5952))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _5952))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _5952)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _12848))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _12848))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _12848)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _12848)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _12848)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"First argument\")", 1742, 0)\=@='$COMMENT'(";;             (@param \"First argument\")", 1742, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0)))
   Call: (261) [system] '$COMMENT'(";;             (@param \"First argument\")", 1742, 0)\=@='$COMMENT'(";;             (@param \"First argument\")", 1742, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _41626, [], _41628)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _41626, [], _41628)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _41626, [], _41628)
   Call: (258) [system] atom('$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _41626, [], _41628)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _41626, [], _41628)
   Call: (258) [system] compound('$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (@param \"First argument\")", 1742, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), _50942, _50944)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT', [";;             (@param \"First argument\")", 1742, 0])
^  Call: (258) [user] subst_vars([";;             (@param \"First argument\")", 1742, 0], _52828, [], _41628)
^  Unify: (258) [user] subst_vars([";;             (@param \"First argument\")", 1742, 0], [";;             (@param \"First argument\")", 1742, 0], [], [])
   Call: (259) [system] var([";;             (@param \"First argument\")", 1742, 0])
^  Redo: (258) [user] subst_vars([";;             (@param \"First argument\")", 1742, 0], _52828, [], _41628)
^  Unify: (258) [user] subst_vars([";;             (@param \"First argument\")", 1742, 0], [_56564|_56566], [], _41628)
^  Call: (259) [user] subst_vars(";;             (@param \"First argument\")", _56564, [], _57504)
^  Unify: (259) [user] subst_vars(";;             (@param \"First argument\")", ";;             (@param \"First argument\")", [], [])
   Call: (260) [system] var(";;             (@param \"First argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"First argument\")", _56564, [], _57504)
^  Unify: (259) [user] subst_vars(";;             (@param \"First argument\")", _56564, [], _57504)
   Call: (260) [system] atom(";;             (@param \"First argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"First argument\")", _56564, [], _57504)
^  Unify: (259) [user] subst_vars(";;             (@param \"First argument\")", _56564, [], _57504)
   Call: (260) [system] compound(";;             (@param \"First argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"First argument\")", _56564, [], _57504)
^  Unify: (259) [user] subst_vars(";;             (@param \"First argument\")", ";;             (@param \"First argument\")", [], [])
^  Exit: (259) [user] subst_vars(";;             (@param \"First argument\")", ";;             (@param \"First argument\")", [], [])
^  Call: (259) [user] subst_vars([1742, 0], _56566, [], _41628)
^  Unify: (259) [user] subst_vars([1742, 0], [1742, 0], [], [])
   Call: (260) [system] var([1742, 0])
^  Redo: (259) [user] subst_vars([1742, 0], _56566, [], _41628)
^  Unify: (259) [user] subst_vars([1742, 0], [_72436|_72438], [], _41628)
^  Call: (260) [user] subst_vars(1742, _72436, [], _73376)
^  Unify: (260) [user] subst_vars(1742, 1742, [], [])
   Call: (261) [system] var(1742)
^  Redo: (260) [user] subst_vars(1742, _72436, [], _73376)
^  Unify: (260) [user] subst_vars(1742, _72436, [], _73376)
   Call: (261) [system] atom(1742)
^  Redo: (260) [user] subst_vars(1742, _72436, [], _73376)
^  Unify: (260) [user] subst_vars(1742, _72436, [], _73376)
   Call: (261) [system] compound(1742)
^  Redo: (260) [user] subst_vars(1742, _72436, [], _73376)
^  Unify: (260) [user] subst_vars(1742, 1742, [], [])
^  Exit: (260) [user] subst_vars(1742, 1742, [], [])
^  Call: (260) [user] subst_vars([0], _72438, [], _41628)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _72438, [], _41628)
^  Unify: (260) [user] subst_vars([0], [_88308|_88310], [], _41628)
^  Call: (261) [user] subst_vars(0, _88308, [], _89248)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _88308, [], _89248)
^  Unify: (261) [user] subst_vars(0, _88308, [], _89248)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _88308, [], _89248)
^  Unify: (261) [user] subst_vars(0, _88308, [], _89248)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _88308, [], _89248)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _88310, [], _41628)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _88310, [], _41628)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1742, 0], [1742, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (@param \"First argument\")", 1742, 0], [";;             (@param \"First argument\")", 1742, 0], [], [])
   Call: (258) [system] compound_name_arguments(_41626, '$COMMENT', [";;             (@param \"First argument\")", 1742, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT', [";;             (@param \"First argument\")", 1742, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (@param \"First argument\")", 1742, 0), '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), [], [])
   Call: (257) [system] _111666=metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"First argument\")", 1742, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1743, 0, 62034, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$stream_position'(62034, 1743, 0, 62068)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _164392))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _164392))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _164392)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _164392)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _164392)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _164392)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _170004))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _170004))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _170004))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _170004))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _170004)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _170004)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _175590))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _175590))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _175590)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _175590)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _175590)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _175590)
   Call: (270) [system] var('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _175590)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$VAR'(_183050))
   Call: (270) [system] atom('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _175590)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _175590)
   Call: (270) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _175590)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _175590)
   Call: (270) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _175590)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _175590)
   Call: (270) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0)==[_192330, _192336]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _175590)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _175590)
   Call: (270) [system] is_list('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _175590)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _175590)
   Call: (270) [system] string('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _175590)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _175590)
   Call: (270) [system] compound('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _202532, _202534)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT', [";;             (@param \"Second argument\")", 1743, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (@param \"Second argument\")", 1743, 0], _206274)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (@param \"Second argument\")", 1743, 0], _206274)
   Call: (271) [apply] apply:maplist_([";;             (@param \"Second argument\")", 1743, 0], _206274, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (@param \"Second argument\")", 1743, 0], [_209092|_209094], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _209092)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _209092)
   Call: (273) [system] var(";;             (@param \"Second argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _209092)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", '$VAR'(_213738))
   Call: (273) [system] atom(";;             (@param \"Second argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _209092)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _209092)
   Call: (273) [system] ";;             (@param \"Second argument\")"==true
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _209092)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _209092)
   Call: (273) [system] ";;             (@param \"Second argument\")"==false
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _209092)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _209092)
   Call: (273) [system] ";;             (@param \"Second argument\")"==[_223018, _223024]
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _209092)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _209092)
   Call: (273) [system] is_list(";;             (@param \"Second argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _209092)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _209092)
   Call: (273) [system] string(";;             (@param \"Second argument\")")
   Exit: (273) [system] string(";;             (@param \"Second argument\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _209092)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _209092)
   Call: (273) [system] compound(";;             (@param \"Second argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _209092)
^  Unify: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _209092)
^  Call: (273) [user] symbol(";;             (@param \"Second argument\")")
^  Unify: (273) [user] symbol(";;             (@param \"Second argument\")")
   Call: (274) [system] atom(";;             (@param \"Second argument\")")
   Fail: (274) [system] atom(";;             (@param \"Second argument\")")
^  Fail: (273) [user] symbol(";;             (@param \"Second argument\")")
^  Redo: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", _209092)
   Call: (273) [system] ";;             (@param \"Second argument\")"=_209092
   Exit: (273) [system] ";;             (@param \"Second argument\")"=";;             (@param \"Second argument\")"
^  Exit: (272) [user] mfix_vars1(";;             (@param \"Second argument\")", ";;             (@param \"Second argument\")")
   Call: (272) [apply] apply:maplist_([1743, 0], _209094, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1743, 0], [_247090|_247092], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1743, _247090)
^  Unify: (273) [user] mfix_vars1(1743, _247090)
   Call: (274) [system] var(1743)
^  Redo: (273) [user] mfix_vars1(1743, _247090)
^  Unify: (273) [user] mfix_vars1(1743, '$VAR'(_251736))
   Call: (274) [system] atom(1743)
^  Redo: (273) [user] mfix_vars1(1743, _247090)
^  Unify: (273) [user] mfix_vars1(1743, _247090)
   Call: (274) [system] 1743==true
^  Redo: (273) [user] mfix_vars1(1743, _247090)
^  Unify: (273) [user] mfix_vars1(1743, _247090)
   Call: (274) [system] 1743==false
^  Redo: (273) [user] mfix_vars1(1743, _247090)
^  Unify: (273) [user] mfix_vars1(1743, _247090)
   Call: (274) [system] 1743==[_261016, _261022]
^  Redo: (273) [user] mfix_vars1(1743, _247090)
^  Unify: (273) [user] mfix_vars1(1743, _247090)
   Call: (274) [system] is_list(1743)
^  Redo: (273) [user] mfix_vars1(1743, _247090)
^  Unify: (273) [user] mfix_vars1(1743, _247090)
   Call: (274) [system] string(1743)
^  Redo: (273) [user] mfix_vars1(1743, _247090)
^  Unify: (273) [user] mfix_vars1(1743, _247090)
   Call: (274) [system] compound(1743)
^  Redo: (273) [user] mfix_vars1(1743, _247090)
^  Unify: (273) [user] mfix_vars1(1743, _247090)
^  Call: (274) [user] symbol(1743)
^  Unify: (274) [user] symbol(1743)
   Call: (275) [system] atom(1743)
   Fail: (275) [system] atom(1743)
^  Fail: (274) [user] symbol(1743)
^  Redo: (273) [user] mfix_vars1(1743, _247090)
   Call: (274) [system] 1743=_247090
   Exit: (274) [system] 1743=1743
^  Exit: (273) [user] mfix_vars1(1743, 1743)
   Call: (273) [apply] apply:maplist_([0], _247092, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_281416|_281418], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _281416)
^  Unify: (274) [user] mfix_vars1(0, _281416)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _281416)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_286062))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _281416)
^  Unify: (274) [user] mfix_vars1(0, _281416)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _281416)
^  Unify: (274) [user] mfix_vars1(0, _281416)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _281416)
^  Unify: (274) [user] mfix_vars1(0, _281416)
   Call: (275) [system] 0==[_295342, _295348]
^  Redo: (274) [user] mfix_vars1(0, _281416)
^  Unify: (274) [user] mfix_vars1(0, _281416)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _281416)
^  Unify: (274) [user] mfix_vars1(0, _281416)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _281416)
^  Unify: (274) [user] mfix_vars1(0, _281416)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _281416)
^  Unify: (274) [user] mfix_vars1(0, _281416)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _281416)
   Call: (275) [system] 0=_281416
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _281418, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1743, 0], [1743, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (@param \"Second argument\")", 1743, 0], [";;             (@param \"Second argument\")", 1743, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (@param \"Second argument\")", 1743, 0], [";;             (@param \"Second argument\")", 1743, 0])
   Call: (270) [system] compound_name_arguments(_175590, '$COMMENT', [";;             (@param \"Second argument\")", 1743, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT', [";;             (@param \"Second argument\")", 1743, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0)\=@='$COMMENT'(";;             (@param \"Second argument\")", 1743, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _170004)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _331590))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _331590))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _331590))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _331590))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _331590)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _331590)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _337176))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _337176))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _337176)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _337176)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _337176)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0)\=@='$COMMENT'(";;             (@param \"Second argument\")", 1743, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _331590)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _164392))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _164392))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _164392))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _164392))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _164392)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _164392)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _359496))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _359496))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _359496)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _359496)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _359496)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0)))
   Call: (267) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0)\=@='$COMMENT'(";;             (@param \"Second argument\")", 1743, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _164392)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0)))
   Call: (261) [system] '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0)\=@='$COMMENT'(";;             (@param \"Second argument\")", 1743, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _388274, [], _388276)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _388274, [], _388276)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _388274, [], _388276)
   Call: (258) [system] atom('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _388274, [], _388276)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _388274, [], _388276)
   Call: (258) [system] compound('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), _397590, _397592)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT', [";;             (@param \"Second argument\")", 1743, 0])
^  Call: (258) [user] subst_vars([";;             (@param \"Second argument\")", 1743, 0], _399476, [], _388276)
^  Unify: (258) [user] subst_vars([";;             (@param \"Second argument\")", 1743, 0], [";;             (@param \"Second argument\")", 1743, 0], [], [])
   Call: (259) [system] var([";;             (@param \"Second argument\")", 1743, 0])
^  Redo: (258) [user] subst_vars([";;             (@param \"Second argument\")", 1743, 0], _399476, [], _388276)
^  Unify: (258) [user] subst_vars([";;             (@param \"Second argument\")", 1743, 0], [_403212|_403214], [], _388276)
^  Call: (259) [user] subst_vars(";;             (@param \"Second argument\")", _403212, [], _404152)
^  Unify: (259) [user] subst_vars(";;             (@param \"Second argument\")", ";;             (@param \"Second argument\")", [], [])
   Call: (260) [system] var(";;             (@param \"Second argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"Second argument\")", _403212, [], _404152)
^  Unify: (259) [user] subst_vars(";;             (@param \"Second argument\")", _403212, [], _404152)
   Call: (260) [system] atom(";;             (@param \"Second argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"Second argument\")", _403212, [], _404152)
^  Unify: (259) [user] subst_vars(";;             (@param \"Second argument\")", _403212, [], _404152)
   Call: (260) [system] compound(";;             (@param \"Second argument\")")
^  Redo: (259) [user] subst_vars(";;             (@param \"Second argument\")", _403212, [], _404152)
^  Unify: (259) [user] subst_vars(";;             (@param \"Second argument\")", ";;             (@param \"Second argument\")", [], [])
^  Exit: (259) [user] subst_vars(";;             (@param \"Second argument\")", ";;             (@param \"Second argument\")", [], [])
^  Call: (259) [user] subst_vars([1743, 0], _403214, [], _388276)
^  Unify: (259) [user] subst_vars([1743, 0], [1743, 0], [], [])
   Call: (260) [system] var([1743, 0])
^  Redo: (259) [user] subst_vars([1743, 0], _403214, [], _388276)
^  Unify: (259) [user] subst_vars([1743, 0], [_419084|_419086], [], _388276)
^  Call: (260) [user] subst_vars(1743, _419084, [], _420024)
^  Unify: (260) [user] subst_vars(1743, 1743, [], [])
   Call: (261) [system] var(1743)
^  Redo: (260) [user] subst_vars(1743, _419084, [], _420024)
^  Unify: (260) [user] subst_vars(1743, _419084, [], _420024)
   Call: (261) [system] atom(1743)
^  Redo: (260) [user] subst_vars(1743, _419084, [], _420024)
^  Unify: (260) [user] subst_vars(1743, _419084, [], _420024)
   Call: (261) [system] compound(1743)
^  Redo: (260) [user] subst_vars(1743, _419084, [], _420024)
^  Unify: (260) [user] subst_vars(1743, 1743, [], [])
^  Exit: (260) [user] subst_vars(1743, 1743, [], [])
^  Call: (260) [user] subst_vars([0], _419086, [], _388276)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _419086, [], _388276)
^  Unify: (260) [user] subst_vars([0], [_434956|_434958], [], _388276)
^  Call: (261) [user] subst_vars(0, _434956, [], _435896)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _434956, [], _435896)
^  Unify: (261) [user] subst_vars(0, _434956, [], _435896)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _434956, [], _435896)
^  Unify: (261) [user] subst_vars(0, _434956, [], _435896)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _434956, [], _435896)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _434958, [], _388276)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _434958, [], _388276)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1743, 0], [1743, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (@param \"Second argument\")", 1743, 0], [";;             (@param \"Second argument\")", 1743, 0], [], [])
   Call: (258) [system] compound_name_arguments(_388274, '$COMMENT', [";;             (@param \"Second argument\")", 1743, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT', [";;             (@param \"Second argument\")", 1743, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), [], [])
   Call: (257) [system] _458314=metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (@param \"Second argument\")", 1743, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1744, 0, 62076, '$COMMENT'(";;           ))", 1744, 0), '$stream_position'(62076, 1744, 0, 62110)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           ))", 1744, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           ))", 1744, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;           ))", 1744, 0), _511034))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           ))", 1744, 0), _511034))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;           ))", 1744, 0), _511034)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           ))", 1744, 0), _511034)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;           ))", 1744, 0), _511034)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;           ))", 1744, 0), _511034)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;           ))", 1744, 0), _516646))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           ))", 1744, 0), _516646))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;           ))", 1744, 0), _516646))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           ))", 1744, 0), _516646))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           ))", 1744, 0), _516646)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           ))", 1744, 0), _516646)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;           ))", 1744, 0), _522232))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           ))", 1744, 0), _522232))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;           ))", 1744, 0), _5980)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           ))", 1744, 0), _5980)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1744, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1744, 0), _5980)
   Call: (270) [system] var('$COMMENT'(";;           ))", 1744, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1744, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1744, 0), '$VAR'(_11540))
   Call: (270) [system] atom('$COMMENT'(";;           ))", 1744, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1744, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1744, 0), _5980)
   Call: (270) [system] '$COMMENT'(";;           ))", 1744, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1744, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1744, 0), _5980)
   Call: (270) [system] '$COMMENT'(";;           ))", 1744, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1744, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1744, 0), _5980)
   Call: (270) [system] '$COMMENT'(";;           ))", 1744, 0)==[_20820, _20826]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1744, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1744, 0), _5980)
   Call: (270) [system] is_list('$COMMENT'(";;           ))", 1744, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1744, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1744, 0), _5980)
   Call: (270) [system] string('$COMMENT'(";;           ))", 1744, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1744, 0), _5980)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1744, 0), _5980)
   Call: (270) [system] compound('$COMMENT'(";;           ))", 1744, 0))
   Exit: (270) [system] compound('$COMMENT'(";;           ))", 1744, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;           ))", 1744, 0), _31022, _31024)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           ))", 1744, 0), '$COMMENT', [";;           ))", 1744, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;           ))", 1744, 0], _34764)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;           ))", 1744, 0], _34764)
   Call: (271) [apply] apply:maplist_([";;           ))", 1744, 0], _34764, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;           ))", 1744, 0], [_37582|_37584], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;           ))", _37582)
^  Unify: (272) [user] mfix_vars1(";;           ))", _37582)
   Call: (273) [system] var(";;           ))")
^  Redo: (272) [user] mfix_vars1(";;           ))", _37582)
^  Unify: (272) [user] mfix_vars1(";;           ))", '$VAR'(_42228))
   Call: (273) [system] atom(";;           ))")
^  Redo: (272) [user] mfix_vars1(";;           ))", _37582)
^  Unify: (272) [user] mfix_vars1(";;           ))", _37582)
   Call: (273) [system] ";;           ))"==true
^  Redo: (272) [user] mfix_vars1(";;           ))", _37582)
^  Unify: (272) [user] mfix_vars1(";;           ))", _37582)
   Call: (273) [system] ";;           ))"==false
^  Redo: (272) [user] mfix_vars1(";;           ))", _37582)
^  Unify: (272) [user] mfix_vars1(";;           ))", _37582)
   Call: (273) [system] ";;           ))"==[_51508, _51514]
^  Redo: (272) [user] mfix_vars1(";;           ))", _37582)
^  Unify: (272) [user] mfix_vars1(";;           ))", _37582)
   Call: (273) [system] is_list(";;           ))")
^  Redo: (272) [user] mfix_vars1(";;           ))", _37582)
^  Unify: (272) [user] mfix_vars1(";;           ))", _37582)
   Call: (273) [system] string(";;           ))")
   Exit: (273) [system] string(";;           ))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;           ))", _37582)
^  Unify: (272) [user] mfix_vars1(";;           ))", _37582)
   Call: (273) [system] compound(";;           ))")
^  Redo: (272) [user] mfix_vars1(";;           ))", _37582)
^  Unify: (272) [user] mfix_vars1(";;           ))", _37582)
^  Call: (273) [user] symbol(";;           ))")
^  Unify: (273) [user] symbol(";;           ))")
   Call: (274) [system] atom(";;           ))")
   Fail: (274) [system] atom(";;           ))")
^  Fail: (273) [user] symbol(";;           ))")
^  Redo: (272) [user] mfix_vars1(";;           ))", _37582)
   Call: (273) [system] ";;           ))"=_37582
   Exit: (273) [system] ";;           ))"=";;           ))"
^  Exit: (272) [user] mfix_vars1(";;           ))", ";;           ))")
   Call: (272) [apply] apply:maplist_([1744, 0], _37584, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1744, 0], [_75580|_75582], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1744, _75580)
^  Unify: (273) [user] mfix_vars1(1744, _75580)
   Call: (274) [system] var(1744)
^  Redo: (273) [user] mfix_vars1(1744, _75580)
^  Unify: (273) [user] mfix_vars1(1744, '$VAR'(_80226))
   Call: (274) [system] atom(1744)
^  Redo: (273) [user] mfix_vars1(1744, _75580)
^  Unify: (273) [user] mfix_vars1(1744, _75580)
   Call: (274) [system] 1744==true
^  Redo: (273) [user] mfix_vars1(1744, _75580)
^  Unify: (273) [user] mfix_vars1(1744, _75580)
   Call: (274) [system] 1744==false
^  Redo: (273) [user] mfix_vars1(1744, _75580)
^  Unify: (273) [user] mfix_vars1(1744, _75580)
   Call: (274) [system] 1744==[_89506, _89512]
^  Redo: (273) [user] mfix_vars1(1744, _75580)
^  Unify: (273) [user] mfix_vars1(1744, _75580)
   Call: (274) [system] is_list(1744)
^  Redo: (273) [user] mfix_vars1(1744, _75580)
^  Unify: (273) [user] mfix_vars1(1744, _75580)
   Call: (274) [system] string(1744)
^  Redo: (273) [user] mfix_vars1(1744, _75580)
^  Unify: (273) [user] mfix_vars1(1744, _75580)
   Call: (274) [system] compound(1744)
^  Redo: (273) [user] mfix_vars1(1744, _75580)
^  Unify: (273) [user] mfix_vars1(1744, _75580)
^  Call: (274) [user] symbol(1744)
^  Unify: (274) [user] symbol(1744)
   Call: (275) [system] atom(1744)
   Fail: (275) [system] atom(1744)
^  Fail: (274) [user] symbol(1744)
^  Redo: (273) [user] mfix_vars1(1744, _75580)
   Call: (274) [system] 1744=_75580
   Exit: (274) [system] 1744=1744
^  Exit: (273) [user] mfix_vars1(1744, 1744)
   Call: (273) [apply] apply:maplist_([0], _75582, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_109906|_109908], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _109906)
^  Unify: (274) [user] mfix_vars1(0, _109906)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _109906)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_114552))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _109906)
^  Unify: (274) [user] mfix_vars1(0, _109906)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _109906)
^  Unify: (274) [user] mfix_vars1(0, _109906)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _109906)
^  Unify: (274) [user] mfix_vars1(0, _109906)
   Call: (275) [system] 0==[_123832, _123838]
^  Redo: (274) [user] mfix_vars1(0, _109906)
^  Unify: (274) [user] mfix_vars1(0, _109906)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _109906)
^  Unify: (274) [user] mfix_vars1(0, _109906)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _109906)
^  Unify: (274) [user] mfix_vars1(0, _109906)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _109906)
^  Unify: (274) [user] mfix_vars1(0, _109906)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _109906)
   Call: (275) [system] 0=_109906
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _109908, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1744, 0], [1744, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;           ))", 1744, 0], [";;           ))", 1744, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;           ))", 1744, 0], [";;           ))", 1744, 0])
   Call: (270) [system] compound_name_arguments(_5980, '$COMMENT', [";;           ))", 1744, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           ))", 1744, 0), '$COMMENT', [";;           ))", 1744, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0)))
   Call: (267) [system] '$COMMENT'(";;           ))", 1744, 0)\=@='$COMMENT'(";;           ))", 1744, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           ))", 1744, 0), _5966)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;           ))", 1744, 0), _160080))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           ))", 1744, 0), _160080))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;           ))", 1744, 0), _160080))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           ))", 1744, 0), _160080))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;           ))", 1744, 0), _160080)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           ))", 1744, 0), _160080)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;           ))", 1744, 0), _165666))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           ))", 1744, 0), _165666))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;           ))", 1744, 0), _165666)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           ))", 1744, 0), _165666)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;           ))", 1744, 0), _165666)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0)))
   Call: (267) [system] '$COMMENT'(";;           ))", 1744, 0)\=@='$COMMENT'(";;           ))", 1744, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;           ))", 1744, 0), _160080)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;           ))", 1744, 0), _5946))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           ))", 1744, 0), _5946))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;           ))", 1744, 0), _5946))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           ))", 1744, 0), _5946))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;           ))", 1744, 0), _5946)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           ))", 1744, 0), _5946)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;           ))", 1744, 0), _187986))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           ))", 1744, 0), _187986))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;           ))", 1744, 0), _187986)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           ))", 1744, 0), _187986)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;           ))", 1744, 0), _187986)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0)))
   Call: (267) [system] '$COMMENT'(";;           ))", 1744, 0)\=@='$COMMENT'(";;           ))", 1744, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;           ))", 1744, 0), _5946)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0)))
   Call: (261) [system] '$COMMENT'(";;           ))", 1744, 0)\=@='$COMMENT'(";;           ))", 1744, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           ))", 1744, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1744, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1744, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1744, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1744, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1744, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;           ))", 1744, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;           ))", 1744, 0), _216764, [], _216766)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;           ))", 1744, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           ))", 1744, 0), _216764, [], _216766)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           ))", 1744, 0), _216764, [], _216766)
   Call: (258) [system] atom('$COMMENT'(";;           ))", 1744, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           ))", 1744, 0), _216764, [], _216766)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           ))", 1744, 0), _216764, [], _216766)
   Call: (258) [system] compound('$COMMENT'(";;           ))", 1744, 0))
   Exit: (258) [system] compound('$COMMENT'(";;           ))", 1744, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;           ))", 1744, 0), _226080, _226082)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           ))", 1744, 0), '$COMMENT', [";;           ))", 1744, 0])
^  Call: (258) [user] subst_vars([";;           ))", 1744, 0], _227966, [], _216766)
^  Unify: (258) [user] subst_vars([";;           ))", 1744, 0], [";;           ))", 1744, 0], [], [])
   Call: (259) [system] var([";;           ))", 1744, 0])
^  Redo: (258) [user] subst_vars([";;           ))", 1744, 0], _227966, [], _216766)
^  Unify: (258) [user] subst_vars([";;           ))", 1744, 0], [_231702|_231704], [], _216766)
^  Call: (259) [user] subst_vars(";;           ))", _231702, [], _232642)
^  Unify: (259) [user] subst_vars(";;           ))", ";;           ))", [], [])
   Call: (260) [system] var(";;           ))")
^  Redo: (259) [user] subst_vars(";;           ))", _231702, [], _232642)
^  Unify: (259) [user] subst_vars(";;           ))", _231702, [], _232642)
   Call: (260) [system] atom(";;           ))")
^  Redo: (259) [user] subst_vars(";;           ))", _231702, [], _232642)
^  Unify: (259) [user] subst_vars(";;           ))", _231702, [], _232642)
   Call: (260) [system] compound(";;           ))")
^  Redo: (259) [user] subst_vars(";;           ))", _231702, [], _232642)
^  Unify: (259) [user] subst_vars(";;           ))", ";;           ))", [], [])
^  Exit: (259) [user] subst_vars(";;           ))", ";;           ))", [], [])
^  Call: (259) [user] subst_vars([1744, 0], _231704, [], _216766)
^  Unify: (259) [user] subst_vars([1744, 0], [1744, 0], [], [])
   Call: (260) [system] var([1744, 0])
^  Redo: (259) [user] subst_vars([1744, 0], _231704, [], _216766)
^  Unify: (259) [user] subst_vars([1744, 0], [_247574|_247576], [], _216766)
^  Call: (260) [user] subst_vars(1744, _247574, [], _248514)
^  Unify: (260) [user] subst_vars(1744, 1744, [], [])
   Call: (261) [system] var(1744)
^  Redo: (260) [user] subst_vars(1744, _247574, [], _248514)
^  Unify: (260) [user] subst_vars(1744, _247574, [], _248514)
   Call: (261) [system] atom(1744)
^  Redo: (260) [user] subst_vars(1744, _247574, [], _248514)
^  Unify: (260) [user] subst_vars(1744, _247574, [], _248514)
   Call: (261) [system] compound(1744)
^  Redo: (260) [user] subst_vars(1744, _247574, [], _248514)
^  Unify: (260) [user] subst_vars(1744, 1744, [], [])
^  Exit: (260) [user] subst_vars(1744, 1744, [], [])
^  Call: (260) [user] subst_vars([0], _247576, [], _216766)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _247576, [], _216766)
^  Unify: (260) [user] subst_vars([0], [_263446|_263448], [], _216766)
^  Call: (261) [user] subst_vars(0, _263446, [], _264386)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _263446, [], _264386)
^  Unify: (261) [user] subst_vars(0, _263446, [], _264386)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _263446, [], _264386)
^  Unify: (261) [user] subst_vars(0, _263446, [], _264386)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _263446, [], _264386)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _263448, [], _216766)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _263448, [], _216766)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1744, 0], [1744, 0], [], [])
^  Exit: (258) [user] subst_vars([";;           ))", 1744, 0], [";;           ))", 1744, 0], [], [])
   Call: (258) [system] compound_name_arguments(_216764, '$COMMENT', [";;           ))", 1744, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           ))", 1744, 0), '$COMMENT', [";;           ))", 1744, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;           ))", 1744, 0), '$COMMENT'(";;           ))", 1744, 0), [], [])
   Call: (257) [system] _286804=metta_file_buffer(+, '$COMMENT'(";;           ))", 1744, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;           ))", 1744, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;           ))", 1744, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           ))", 1744, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           ))", 1744, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           ))", 1744, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           ))", 1744, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           ))", 1744, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           ))", 1744, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1745, 0, 62092, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$stream_position'(62092, 1745, 0, 62126)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _339528))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _339528))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _339528)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _339528)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _339528)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _339528)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _345140))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _345140))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _345140))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _345140))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _345140)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _345140)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _350726))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _350726))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _350726)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _350726)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _350726)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _350726)
   Call: (270) [system] var('$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _350726)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$VAR'(_358186))
   Call: (270) [system] atom('$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _350726)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _350726)
   Call: (270) [system] '$COMMENT'(";;           (@return \"Return value\")", 1745, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _350726)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _350726)
   Call: (270) [system] '$COMMENT'(";;           (@return \"Return value\")", 1745, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _350726)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _350726)
   Call: (270) [system] '$COMMENT'(";;           (@return \"Return value\")", 1745, 0)==[_367466, _367472]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _350726)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _350726)
   Call: (270) [system] is_list('$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _350726)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _350726)
   Call: (270) [system] string('$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _350726)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _350726)
   Call: (270) [system] compound('$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
   Exit: (270) [system] compound('$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _377668, _377670)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT', [";;           (@return \"Return value\")", 1745, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;           (@return \"Return value\")", 1745, 0], _381410)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@return \"Return value\")", 1745, 0], _381410)
   Call: (271) [apply] apply:maplist_([";;           (@return \"Return value\")", 1745, 0], _381410, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;           (@return \"Return value\")", 1745, 0], [_384228|_384230], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _384228)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _384228)
   Call: (273) [system] var(";;           (@return \"Return value\")")
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _384228)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", '$VAR'(_388874))
   Call: (273) [system] atom(";;           (@return \"Return value\")")
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _384228)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _384228)
   Call: (273) [system] ";;           (@return \"Return value\")"==true
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _384228)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _384228)
   Call: (273) [system] ";;           (@return \"Return value\")"==false
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _384228)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _384228)
   Call: (273) [system] ";;           (@return \"Return value\")"==[_398154, _398160]
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _384228)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _384228)
   Call: (273) [system] is_list(";;           (@return \"Return value\")")
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _384228)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _384228)
   Call: (273) [system] string(";;           (@return \"Return value\")")
   Exit: (273) [system] string(";;           (@return \"Return value\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _384228)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _384228)
   Call: (273) [system] compound(";;           (@return \"Return value\")")
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _384228)
^  Unify: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _384228)
^  Call: (273) [user] symbol(";;           (@return \"Return value\")")
^  Unify: (273) [user] symbol(";;           (@return \"Return value\")")
   Call: (274) [system] atom(";;           (@return \"Return value\")")
   Fail: (274) [system] atom(";;           (@return \"Return value\")")
^  Fail: (273) [user] symbol(";;           (@return \"Return value\")")
^  Redo: (272) [user] mfix_vars1(";;           (@return \"Return value\")", _384228)
   Call: (273) [system] ";;           (@return \"Return value\")"=_384228
   Exit: (273) [system] ";;           (@return \"Return value\")"=";;           (@return \"Return value\")"
^  Exit: (272) [user] mfix_vars1(";;           (@return \"Return value\")", ";;           (@return \"Return value\")")
   Call: (272) [apply] apply:maplist_([1745, 0], _384230, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1745, 0], [_422226|_422228], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1745, _422226)
^  Unify: (273) [user] mfix_vars1(1745, _422226)
   Call: (274) [system] var(1745)
^  Redo: (273) [user] mfix_vars1(1745, _422226)
^  Unify: (273) [user] mfix_vars1(1745, '$VAR'(_426872))
   Call: (274) [system] atom(1745)
^  Redo: (273) [user] mfix_vars1(1745, _422226)
^  Unify: (273) [user] mfix_vars1(1745, _422226)
   Call: (274) [system] 1745==true
^  Redo: (273) [user] mfix_vars1(1745, _422226)
^  Unify: (273) [user] mfix_vars1(1745, _422226)
   Call: (274) [system] 1745==false
^  Redo: (273) [user] mfix_vars1(1745, _422226)
^  Unify: (273) [user] mfix_vars1(1745, _422226)
   Call: (274) [system] 1745==[_436152, _436158]
^  Redo: (273) [user] mfix_vars1(1745, _422226)
^  Unify: (273) [user] mfix_vars1(1745, _422226)
   Call: (274) [system] is_list(1745)
^  Redo: (273) [user] mfix_vars1(1745, _422226)
^  Unify: (273) [user] mfix_vars1(1745, _422226)
   Call: (274) [system] string(1745)
^  Redo: (273) [user] mfix_vars1(1745, _422226)
^  Unify: (273) [user] mfix_vars1(1745, _422226)
   Call: (274) [system] compound(1745)
^  Redo: (273) [user] mfix_vars1(1745, _422226)
^  Unify: (273) [user] mfix_vars1(1745, _422226)
^  Call: (274) [user] symbol(1745)
^  Unify: (274) [user] symbol(1745)
   Call: (275) [system] atom(1745)
   Fail: (275) [system] atom(1745)
^  Fail: (274) [user] symbol(1745)
^  Redo: (273) [user] mfix_vars1(1745, _422226)
   Call: (274) [system] 1745=_422226
   Exit: (274) [system] 1745=1745
^  Exit: (273) [user] mfix_vars1(1745, 1745)
   Call: (273) [apply] apply:maplist_([0], _422228, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_456552|_456554], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _456552)
^  Unify: (274) [user] mfix_vars1(0, _456552)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _456552)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_461198))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _456552)
^  Unify: (274) [user] mfix_vars1(0, _456552)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _456552)
^  Unify: (274) [user] mfix_vars1(0, _456552)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _456552)
^  Unify: (274) [user] mfix_vars1(0, _456552)
   Call: (275) [system] 0==[_470478, _470484]
^  Redo: (274) [user] mfix_vars1(0, _456552)
^  Unify: (274) [user] mfix_vars1(0, _456552)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _456552)
^  Unify: (274) [user] mfix_vars1(0, _456552)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _456552)
^  Unify: (274) [user] mfix_vars1(0, _456552)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _456552)
^  Unify: (274) [user] mfix_vars1(0, _456552)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _456552)
   Call: (275) [system] 0=_456552
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _456554, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1745, 0], [1745, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;           (@return \"Return value\")", 1745, 0], [";;           (@return \"Return value\")", 1745, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;           (@return \"Return value\")", 1745, 0], [";;           (@return \"Return value\")", 1745, 0])
   Call: (270) [system] compound_name_arguments(_350726, '$COMMENT', [";;           (@return \"Return value\")", 1745, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT', [";;           (@return \"Return value\")", 1745, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@return \"Return value\")", 1745, 0)\=@='$COMMENT'(";;           (@return \"Return value\")", 1745, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _345140)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _506726))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _506726))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _506726))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _506726))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _506726)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _506726)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _512312))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _512312))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _512312)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _512312)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _512312)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@return \"Return value\")", 1745, 0)\=@='$COMMENT'(";;           (@return \"Return value\")", 1745, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _5972)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _16748))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _16748))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _16748)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _16748)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _16748)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0)))
   Call: (267) [system] '$COMMENT'(";;           (@return \"Return value\")", 1745, 0)\=@='$COMMENT'(";;           (@return \"Return value\")", 1745, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0)))
   Call: (261) [system] '$COMMENT'(";;           (@return \"Return value\")", 1745, 0)\=@='$COMMENT'(";;           (@return \"Return value\")", 1745, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _45526, [], _45528)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _45526, [], _45528)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _45526, [], _45528)
   Call: (258) [system] atom('$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _45526, [], _45528)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _45526, [], _45528)
   Call: (258) [system] compound('$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
   Exit: (258) [system] compound('$COMMENT'(";;           (@return \"Return value\")", 1745, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), _54842, _54844)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT', [";;           (@return \"Return value\")", 1745, 0])
^  Call: (258) [user] subst_vars([";;           (@return \"Return value\")", 1745, 0], _56728, [], _45528)
^  Unify: (258) [user] subst_vars([";;           (@return \"Return value\")", 1745, 0], [";;           (@return \"Return value\")", 1745, 0], [], [])
   Call: (259) [system] var([";;           (@return \"Return value\")", 1745, 0])
^  Redo: (258) [user] subst_vars([";;           (@return \"Return value\")", 1745, 0], _56728, [], _45528)
^  Unify: (258) [user] subst_vars([";;           (@return \"Return value\")", 1745, 0], [_60464|_60466], [], _45528)
^  Call: (259) [user] subst_vars(";;           (@return \"Return value\")", _60464, [], _61404)
^  Unify: (259) [user] subst_vars(";;           (@return \"Return value\")", ";;           (@return \"Return value\")", [], [])
   Call: (260) [system] var(";;           (@return \"Return value\")")
^  Redo: (259) [user] subst_vars(";;           (@return \"Return value\")", _60464, [], _61404)
^  Unify: (259) [user] subst_vars(";;           (@return \"Return value\")", _60464, [], _61404)
   Call: (260) [system] atom(";;           (@return \"Return value\")")
^  Redo: (259) [user] subst_vars(";;           (@return \"Return value\")", _60464, [], _61404)
^  Unify: (259) [user] subst_vars(";;           (@return \"Return value\")", _60464, [], _61404)
   Call: (260) [system] compound(";;           (@return \"Return value\")")
^  Redo: (259) [user] subst_vars(";;           (@return \"Return value\")", _60464, [], _61404)
^  Unify: (259) [user] subst_vars(";;           (@return \"Return value\")", ";;           (@return \"Return value\")", [], [])
^  Exit: (259) [user] subst_vars(";;           (@return \"Return value\")", ";;           (@return \"Return value\")", [], [])
^  Call: (259) [user] subst_vars([1745, 0], _60466, [], _45528)
^  Unify: (259) [user] subst_vars([1745, 0], [1745, 0], [], [])
   Call: (260) [system] var([1745, 0])
^  Redo: (259) [user] subst_vars([1745, 0], _60466, [], _45528)
^  Unify: (259) [user] subst_vars([1745, 0], [_76336|_76338], [], _45528)
^  Call: (260) [user] subst_vars(1745, _76336, [], _77276)
^  Unify: (260) [user] subst_vars(1745, 1745, [], [])
   Call: (261) [system] var(1745)
^  Redo: (260) [user] subst_vars(1745, _76336, [], _77276)
^  Unify: (260) [user] subst_vars(1745, _76336, [], _77276)
   Call: (261) [system] atom(1745)
^  Redo: (260) [user] subst_vars(1745, _76336, [], _77276)
^  Unify: (260) [user] subst_vars(1745, _76336, [], _77276)
   Call: (261) [system] compound(1745)
^  Redo: (260) [user] subst_vars(1745, _76336, [], _77276)
^  Unify: (260) [user] subst_vars(1745, 1745, [], [])
^  Exit: (260) [user] subst_vars(1745, 1745, [], [])
^  Call: (260) [user] subst_vars([0], _76338, [], _45528)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _76338, [], _45528)
^  Unify: (260) [user] subst_vars([0], [_92208|_92210], [], _45528)
^  Call: (261) [user] subst_vars(0, _92208, [], _93148)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _92208, [], _93148)
^  Unify: (261) [user] subst_vars(0, _92208, [], _93148)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _92208, [], _93148)
^  Unify: (261) [user] subst_vars(0, _92208, [], _93148)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _92208, [], _93148)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _92210, [], _45528)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _92210, [], _45528)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1745, 0], [1745, 0], [], [])
^  Exit: (258) [user] subst_vars([";;           (@return \"Return value\")", 1745, 0], [";;           (@return \"Return value\")", 1745, 0], [], [])
   Call: (258) [system] compound_name_arguments(_45526, '$COMMENT', [";;           (@return \"Return value\")", 1745, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT', [";;           (@return \"Return value\")", 1745, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;           (@return \"Return value\")", 1745, 0), '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), [], [])
   Call: (257) [system] _115566=metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;           (@return \"Return value\")", 1745, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1746, 0, 62130, '$COMMENT'(";;         )", 1746, 0), '$stream_position'(62130, 1746, 0, 62164)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         )", 1746, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         )", 1746, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         )", 1746, 0), _168284))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         )", 1746, 0), _168284))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         )", 1746, 0), _168284)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         )", 1746, 0), _168284)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         )", 1746, 0), _168284)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         )", 1746, 0), _168284)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         )", 1746, 0), _173896))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         )", 1746, 0), _173896))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         )", 1746, 0), _173896))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         )", 1746, 0), _173896))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         )", 1746, 0), _173896)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         )", 1746, 0), _173896)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         )", 1746, 0), _179482))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         )", 1746, 0), _179482))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         )", 1746, 0), _179482)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         )", 1746, 0), _179482)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1746, 0), _179482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1746, 0), _179482)
   Call: (270) [system] var('$COMMENT'(";;         )", 1746, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1746, 0), _179482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1746, 0), '$VAR'(_186942))
   Call: (270) [system] atom('$COMMENT'(";;         )", 1746, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1746, 0), _179482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1746, 0), _179482)
   Call: (270) [system] '$COMMENT'(";;         )", 1746, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1746, 0), _179482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1746, 0), _179482)
   Call: (270) [system] '$COMMENT'(";;         )", 1746, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1746, 0), _179482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1746, 0), _179482)
   Call: (270) [system] '$COMMENT'(";;         )", 1746, 0)==[_196222, _196228]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1746, 0), _179482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1746, 0), _179482)
   Call: (270) [system] is_list('$COMMENT'(";;         )", 1746, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1746, 0), _179482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1746, 0), _179482)
   Call: (270) [system] string('$COMMENT'(";;         )", 1746, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1746, 0), _179482)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1746, 0), _179482)
   Call: (270) [system] compound('$COMMENT'(";;         )", 1746, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         )", 1746, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         )", 1746, 0), _206424, _206426)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         )", 1746, 0), '$COMMENT', [";;         )", 1746, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         )", 1746, 0], _210166)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         )", 1746, 0], _210166)
   Call: (271) [apply] apply:maplist_([";;         )", 1746, 0], _210166, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         )", 1746, 0], [_212984|_212986], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         )", _212984)
^  Unify: (272) [user] mfix_vars1(";;         )", _212984)
   Call: (273) [system] var(";;         )")
^  Redo: (272) [user] mfix_vars1(";;         )", _212984)
^  Unify: (272) [user] mfix_vars1(";;         )", '$VAR'(_217630))
   Call: (273) [system] atom(";;         )")
^  Redo: (272) [user] mfix_vars1(";;         )", _212984)
^  Unify: (272) [user] mfix_vars1(";;         )", _212984)
   Call: (273) [system] ";;         )"==true
^  Redo: (272) [user] mfix_vars1(";;         )", _212984)
^  Unify: (272) [user] mfix_vars1(";;         )", _212984)
   Call: (273) [system] ";;         )"==false
^  Redo: (272) [user] mfix_vars1(";;         )", _212984)
^  Unify: (272) [user] mfix_vars1(";;         )", _212984)
   Call: (273) [system] ";;         )"==[_226910, _226916]
^  Redo: (272) [user] mfix_vars1(";;         )", _212984)
^  Unify: (272) [user] mfix_vars1(";;         )", _212984)
   Call: (273) [system] is_list(";;         )")
^  Redo: (272) [user] mfix_vars1(";;         )", _212984)
^  Unify: (272) [user] mfix_vars1(";;         )", _212984)
   Call: (273) [system] string(";;         )")
   Exit: (273) [system] string(";;         )")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         )", _212984)
^  Unify: (272) [user] mfix_vars1(";;         )", _212984)
   Call: (273) [system] compound(";;         )")
^  Redo: (272) [user] mfix_vars1(";;         )", _212984)
^  Unify: (272) [user] mfix_vars1(";;         )", _212984)
^  Call: (273) [user] symbol(";;         )")
^  Unify: (273) [user] symbol(";;         )")
   Call: (274) [system] atom(";;         )")
   Fail: (274) [system] atom(";;         )")
^  Fail: (273) [user] symbol(";;         )")
^  Redo: (272) [user] mfix_vars1(";;         )", _212984)
   Call: (273) [system] ";;         )"=_212984
   Exit: (273) [system] ";;         )"=";;         )"
^  Exit: (272) [user] mfix_vars1(";;         )", ";;         )")
   Call: (272) [apply] apply:maplist_([1746, 0], _212986, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1746, 0], [_250982|_250984], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1746, _250982)
^  Unify: (273) [user] mfix_vars1(1746, _250982)
   Call: (274) [system] var(1746)
^  Redo: (273) [user] mfix_vars1(1746, _250982)
^  Unify: (273) [user] mfix_vars1(1746, '$VAR'(_255628))
   Call: (274) [system] atom(1746)
^  Redo: (273) [user] mfix_vars1(1746, _250982)
^  Unify: (273) [user] mfix_vars1(1746, _250982)
   Call: (274) [system] 1746==true
^  Redo: (273) [user] mfix_vars1(1746, _250982)
^  Unify: (273) [user] mfix_vars1(1746, _250982)
   Call: (274) [system] 1746==false
^  Redo: (273) [user] mfix_vars1(1746, _250982)
^  Unify: (273) [user] mfix_vars1(1746, _250982)
   Call: (274) [system] 1746==[_264908, _264914]
^  Redo: (273) [user] mfix_vars1(1746, _250982)
^  Unify: (273) [user] mfix_vars1(1746, _250982)
   Call: (274) [system] is_list(1746)
^  Redo: (273) [user] mfix_vars1(1746, _250982)
^  Unify: (273) [user] mfix_vars1(1746, _250982)
   Call: (274) [system] string(1746)
^  Redo: (273) [user] mfix_vars1(1746, _250982)
^  Unify: (273) [user] mfix_vars1(1746, _250982)
   Call: (274) [system] compound(1746)
^  Redo: (273) [user] mfix_vars1(1746, _250982)
^  Unify: (273) [user] mfix_vars1(1746, _250982)
^  Call: (274) [user] symbol(1746)
^  Unify: (274) [user] symbol(1746)
   Call: (275) [system] atom(1746)
   Fail: (275) [system] atom(1746)
^  Fail: (274) [user] symbol(1746)
^  Redo: (273) [user] mfix_vars1(1746, _250982)
   Call: (274) [system] 1746=_250982
   Exit: (274) [system] 1746=1746
^  Exit: (273) [user] mfix_vars1(1746, 1746)
   Call: (273) [apply] apply:maplist_([0], _250984, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_285308|_285310], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _285308)
^  Unify: (274) [user] mfix_vars1(0, _285308)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _285308)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_289954))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _285308)
^  Unify: (274) [user] mfix_vars1(0, _285308)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _285308)
^  Unify: (274) [user] mfix_vars1(0, _285308)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _285308)
^  Unify: (274) [user] mfix_vars1(0, _285308)
   Call: (275) [system] 0==[_299234, _299240]
^  Redo: (274) [user] mfix_vars1(0, _285308)
^  Unify: (274) [user] mfix_vars1(0, _285308)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _285308)
^  Unify: (274) [user] mfix_vars1(0, _285308)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _285308)
^  Unify: (274) [user] mfix_vars1(0, _285308)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _285308)
^  Unify: (274) [user] mfix_vars1(0, _285308)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _285308)
   Call: (275) [system] 0=_285308
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _285310, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1746, 0], [1746, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         )", 1746, 0], [";;         )", 1746, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         )", 1746, 0], [";;         )", 1746, 0])
   Call: (270) [system] compound_name_arguments(_179482, '$COMMENT', [";;         )", 1746, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         )", 1746, 0), '$COMMENT', [";;         )", 1746, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0)))
   Call: (267) [system] '$COMMENT'(";;         )", 1746, 0)\=@='$COMMENT'(";;         )", 1746, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         )", 1746, 0), _173896)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         )", 1746, 0), _335482))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         )", 1746, 0), _335482))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         )", 1746, 0), _335482))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         )", 1746, 0), _335482))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         )", 1746, 0), _335482)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         )", 1746, 0), _335482)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         )", 1746, 0), _341068))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         )", 1746, 0), _341068))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         )", 1746, 0), _341068)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         )", 1746, 0), _341068)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         )", 1746, 0), _341068)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0)))
   Call: (267) [system] '$COMMENT'(";;         )", 1746, 0)\=@='$COMMENT'(";;         )", 1746, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         )", 1746, 0), _335482)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         )", 1746, 0), _168284))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         )", 1746, 0), _168284))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         )", 1746, 0), _168284))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         )", 1746, 0), _168284))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         )", 1746, 0), _168284)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         )", 1746, 0), _168284)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         )", 1746, 0), _363388))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         )", 1746, 0), _363388))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         )", 1746, 0), _363388)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         )", 1746, 0), _363388)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         )", 1746, 0), _363388)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0)))
   Call: (267) [system] '$COMMENT'(";;         )", 1746, 0)\=@='$COMMENT'(";;         )", 1746, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         )", 1746, 0), _168284)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0)))
   Call: (261) [system] '$COMMENT'(";;         )", 1746, 0)\=@='$COMMENT'(";;         )", 1746, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         )", 1746, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         )", 1746, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         )", 1746, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         )", 1746, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         )", 1746, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         )", 1746, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         )", 1746, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         )", 1746, 0), _392166, [], _392168)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         )", 1746, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         )", 1746, 0), _392166, [], _392168)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         )", 1746, 0), _392166, [], _392168)
   Call: (258) [system] atom('$COMMENT'(";;         )", 1746, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         )", 1746, 0), _392166, [], _392168)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         )", 1746, 0), _392166, [], _392168)
   Call: (258) [system] compound('$COMMENT'(";;         )", 1746, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         )", 1746, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         )", 1746, 0), _401482, _401484)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         )", 1746, 0), '$COMMENT', [";;         )", 1746, 0])
^  Call: (258) [user] subst_vars([";;         )", 1746, 0], _403368, [], _392168)
^  Unify: (258) [user] subst_vars([";;         )", 1746, 0], [";;         )", 1746, 0], [], [])
   Call: (259) [system] var([";;         )", 1746, 0])
^  Redo: (258) [user] subst_vars([";;         )", 1746, 0], _403368, [], _392168)
^  Unify: (258) [user] subst_vars([";;         )", 1746, 0], [_407104|_407106], [], _392168)
^  Call: (259) [user] subst_vars(";;         )", _407104, [], _408044)
^  Unify: (259) [user] subst_vars(";;         )", ";;         )", [], [])
   Call: (260) [system] var(";;         )")
^  Redo: (259) [user] subst_vars(";;         )", _407104, [], _408044)
^  Unify: (259) [user] subst_vars(";;         )", _407104, [], _408044)
   Call: (260) [system] atom(";;         )")
^  Redo: (259) [user] subst_vars(";;         )", _407104, [], _408044)
^  Unify: (259) [user] subst_vars(";;         )", _407104, [], _408044)
   Call: (260) [system] compound(";;         )")
^  Redo: (259) [user] subst_vars(";;         )", _407104, [], _408044)
^  Unify: (259) [user] subst_vars(";;         )", ";;         )", [], [])
^  Exit: (259) [user] subst_vars(";;         )", ";;         )", [], [])
^  Call: (259) [user] subst_vars([1746, 0], _407106, [], _392168)
^  Unify: (259) [user] subst_vars([1746, 0], [1746, 0], [], [])
   Call: (260) [system] var([1746, 0])
^  Redo: (259) [user] subst_vars([1746, 0], _407106, [], _392168)
^  Unify: (259) [user] subst_vars([1746, 0], [_422976|_422978], [], _392168)
^  Call: (260) [user] subst_vars(1746, _422976, [], _423916)
^  Unify: (260) [user] subst_vars(1746, 1746, [], [])
   Call: (261) [system] var(1746)
^  Redo: (260) [user] subst_vars(1746, _422976, [], _423916)
^  Unify: (260) [user] subst_vars(1746, _422976, [], _423916)
   Call: (261) [system] atom(1746)
^  Redo: (260) [user] subst_vars(1746, _422976, [], _423916)
^  Unify: (260) [user] subst_vars(1746, _422976, [], _423916)
   Call: (261) [system] compound(1746)
^  Redo: (260) [user] subst_vars(1746, _422976, [], _423916)
^  Unify: (260) [user] subst_vars(1746, 1746, [], [])
^  Exit: (260) [user] subst_vars(1746, 1746, [], [])
^  Call: (260) [user] subst_vars([0], _422978, [], _392168)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _422978, [], _392168)
^  Unify: (260) [user] subst_vars([0], [_438848|_438850], [], _392168)
^  Call: (261) [user] subst_vars(0, _438848, [], _439788)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _438848, [], _439788)
^  Unify: (261) [user] subst_vars(0, _438848, [], _439788)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _438848, [], _439788)
^  Unify: (261) [user] subst_vars(0, _438848, [], _439788)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _438848, [], _439788)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _438850, [], _392168)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _438850, [], _392168)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1746, 0], [1746, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         )", 1746, 0], [";;         )", 1746, 0], [], [])
   Call: (258) [system] compound_name_arguments(_392166, '$COMMENT', [";;         )", 1746, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         )", 1746, 0), '$COMMENT', [";;         )", 1746, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         )", 1746, 0), '$COMMENT'(";;         )", 1746, 0), [], [])
   Call: (257) [system] _462206=metta_file_buffer(+, '$COMMENT'(";;         )", 1746, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         )", 1746, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         )", 1746, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         )", 1746, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         )", 1746, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         )", 1746, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         )", 1746, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         )", 1746, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         )", 1746, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1747, 0, 62143, '$COMMENT'(";;", 1747, 0), '$stream_position'(62143, 1747, 0, 62177)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1747, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1747, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1747, 0), _514922))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1747, 0), _514922))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1747, 0), _514922)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1747, 0), _514922)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1747, 0), _514922)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1747, 0), _514922)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1747, 0), _520534))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1747, 0), _520534))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1747, 0), _520534))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1747, 0), _5962))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1747, 0), _5962)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1747, 0), _5962)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1747, 0), _8190))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1747, 0), _8190))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1747, 0), _8190)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1747, 0), _8190)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1747, 0), _8190)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1747, 0), _8190)
   Call: (270) [system] var('$COMMENT'(";;", 1747, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1747, 0), _8190)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1747, 0), '$VAR'(_15650))
   Call: (270) [system] atom('$COMMENT'(";;", 1747, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1747, 0), _8190)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1747, 0), _8190)
   Call: (270) [system] '$COMMENT'(";;", 1747, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1747, 0), _8190)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1747, 0), _8190)
   Call: (270) [system] '$COMMENT'(";;", 1747, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1747, 0), _8190)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1747, 0), _8190)
   Call: (270) [system] '$COMMENT'(";;", 1747, 0)==[_24930, _24936]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1747, 0), _8190)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1747, 0), _8190)
   Call: (270) [system] is_list('$COMMENT'(";;", 1747, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1747, 0), _8190)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1747, 0), _8190)
   Call: (270) [system] string('$COMMENT'(";;", 1747, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1747, 0), _8190)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1747, 0), _8190)
   Call: (270) [system] compound('$COMMENT'(";;", 1747, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1747, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1747, 0), _35132, _35134)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1747, 0), '$COMMENT', [";;", 1747, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1747, 0], _38874)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1747, 0], _38874)
   Call: (271) [apply] apply:maplist_([";;", 1747, 0], _38874, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1747, 0], [_41692|_41694], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _41692)
^  Unify: (272) [user] mfix_vars1(";;", _41692)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _41692)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_46338))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _41692)
^  Unify: (272) [user] mfix_vars1(";;", _41692)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _41692)
^  Unify: (272) [user] mfix_vars1(";;", _41692)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _41692)
^  Unify: (272) [user] mfix_vars1(";;", _41692)
   Call: (273) [system] ";;"==[_55618, _55624]
^  Redo: (272) [user] mfix_vars1(";;", _41692)
^  Unify: (272) [user] mfix_vars1(";;", _41692)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _41692)
^  Unify: (272) [user] mfix_vars1(";;", _41692)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _41692)
^  Unify: (272) [user] mfix_vars1(";;", _41692)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _41692)
^  Unify: (272) [user] mfix_vars1(";;", _41692)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _41692)
   Call: (273) [system] ";;"=_41692
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1747, 0], _41694, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1747, 0], [_79690|_79692], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1747, _79690)
^  Unify: (273) [user] mfix_vars1(1747, _79690)
   Call: (274) [system] var(1747)
^  Redo: (273) [user] mfix_vars1(1747, _79690)
^  Unify: (273) [user] mfix_vars1(1747, '$VAR'(_84336))
   Call: (274) [system] atom(1747)
^  Redo: (273) [user] mfix_vars1(1747, _79690)
^  Unify: (273) [user] mfix_vars1(1747, _79690)
   Call: (274) [system] 1747==true
^  Redo: (273) [user] mfix_vars1(1747, _79690)
^  Unify: (273) [user] mfix_vars1(1747, _79690)
   Call: (274) [system] 1747==false
^  Redo: (273) [user] mfix_vars1(1747, _79690)
^  Unify: (273) [user] mfix_vars1(1747, _79690)
   Call: (274) [system] 1747==[_93616, _93622]
^  Redo: (273) [user] mfix_vars1(1747, _79690)
^  Unify: (273) [user] mfix_vars1(1747, _79690)
   Call: (274) [system] is_list(1747)
^  Redo: (273) [user] mfix_vars1(1747, _79690)
^  Unify: (273) [user] mfix_vars1(1747, _79690)
   Call: (274) [system] string(1747)
^  Redo: (273) [user] mfix_vars1(1747, _79690)
^  Unify: (273) [user] mfix_vars1(1747, _79690)
   Call: (274) [system] compound(1747)
^  Redo: (273) [user] mfix_vars1(1747, _79690)
^  Unify: (273) [user] mfix_vars1(1747, _79690)
^  Call: (274) [user] symbol(1747)
^  Unify: (274) [user] symbol(1747)
   Call: (275) [system] atom(1747)
   Fail: (275) [system] atom(1747)
^  Fail: (274) [user] symbol(1747)
^  Redo: (273) [user] mfix_vars1(1747, _79690)
   Call: (274) [system] 1747=_79690
   Exit: (274) [system] 1747=1747
^  Exit: (273) [user] mfix_vars1(1747, 1747)
   Call: (273) [apply] apply:maplist_([0], _79692, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_114016|_114018], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _114016)
^  Unify: (274) [user] mfix_vars1(0, _114016)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _114016)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_118662))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _114016)
^  Unify: (274) [user] mfix_vars1(0, _114016)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _114016)
^  Unify: (274) [user] mfix_vars1(0, _114016)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _114016)
^  Unify: (274) [user] mfix_vars1(0, _114016)
   Call: (275) [system] 0==[_127942, _127948]
^  Redo: (274) [user] mfix_vars1(0, _114016)
^  Unify: (274) [user] mfix_vars1(0, _114016)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _114016)
^  Unify: (274) [user] mfix_vars1(0, _114016)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _114016)
^  Unify: (274) [user] mfix_vars1(0, _114016)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _114016)
^  Unify: (274) [user] mfix_vars1(0, _114016)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _114016)
   Call: (275) [system] 0=_114016
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _114018, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1747, 0], [1747, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1747, 0], [";;", 1747, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1747, 0], [";;", 1747, 0])
   Call: (270) [system] compound_name_arguments(_8190, '$COMMENT', [";;", 1747, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1747, 0), '$COMMENT', [";;", 1747, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1747, 0)\=@='$COMMENT'(";;", 1747, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1747, 0), _5962)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1747, 0), _164190))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1747, 0), _164190))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1747, 0), _164190))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1747, 0), _164190))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1747, 0), _164190)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1747, 0), _164190)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1747, 0), _169776))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1747, 0), _169776))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1747, 0), _169776)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1747, 0), _169776)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1747, 0), _169776)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1747, 0)\=@='$COMMENT'(";;", 1747, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1747, 0), _164190)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1747, 0), _5942))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1747, 0), _5942))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1747, 0), _5942))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1747, 0), _5942))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1747, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1747, 0), _5942)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1747, 0), _192096))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1747, 0), _192096))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1747, 0), _192096)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1747, 0), _192096)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1747, 0), _192096)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1747, 0)\=@='$COMMENT'(";;", 1747, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1747, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1747, 0)\=@='$COMMENT'(";;", 1747, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1747, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1747, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1747, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1747, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1747, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1747, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1747, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1747, 0), _220874, [], _220876)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1747, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1747, 0), _220874, [], _220876)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1747, 0), _220874, [], _220876)
   Call: (258) [system] atom('$COMMENT'(";;", 1747, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1747, 0), _220874, [], _220876)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1747, 0), _220874, [], _220876)
   Call: (258) [system] compound('$COMMENT'(";;", 1747, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1747, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1747, 0), _230190, _230192)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1747, 0), '$COMMENT', [";;", 1747, 0])
^  Call: (258) [user] subst_vars([";;", 1747, 0], _232076, [], _220876)
^  Unify: (258) [user] subst_vars([";;", 1747, 0], [";;", 1747, 0], [], [])
   Call: (259) [system] var([";;", 1747, 0])
^  Redo: (258) [user] subst_vars([";;", 1747, 0], _232076, [], _220876)
^  Unify: (258) [user] subst_vars([";;", 1747, 0], [_235812|_235814], [], _220876)
^  Call: (259) [user] subst_vars(";;", _235812, [], _236752)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _235812, [], _236752)
^  Unify: (259) [user] subst_vars(";;", _235812, [], _236752)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _235812, [], _236752)
^  Unify: (259) [user] subst_vars(";;", _235812, [], _236752)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _235812, [], _236752)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1747, 0], _235814, [], _220876)
^  Unify: (259) [user] subst_vars([1747, 0], [1747, 0], [], [])
   Call: (260) [system] var([1747, 0])
^  Redo: (259) [user] subst_vars([1747, 0], _235814, [], _220876)
^  Unify: (259) [user] subst_vars([1747, 0], [_251684|_251686], [], _220876)
^  Call: (260) [user] subst_vars(1747, _251684, [], _252624)
^  Unify: (260) [user] subst_vars(1747, 1747, [], [])
   Call: (261) [system] var(1747)
^  Redo: (260) [user] subst_vars(1747, _251684, [], _252624)
^  Unify: (260) [user] subst_vars(1747, _251684, [], _252624)
   Call: (261) [system] atom(1747)
^  Redo: (260) [user] subst_vars(1747, _251684, [], _252624)
^  Unify: (260) [user] subst_vars(1747, _251684, [], _252624)
   Call: (261) [system] compound(1747)
^  Redo: (260) [user] subst_vars(1747, _251684, [], _252624)
^  Unify: (260) [user] subst_vars(1747, 1747, [], [])
^  Exit: (260) [user] subst_vars(1747, 1747, [], [])
^  Call: (260) [user] subst_vars([0], _251686, [], _220876)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _251686, [], _220876)
^  Unify: (260) [user] subst_vars([0], [_267556|_267558], [], _220876)
^  Call: (261) [user] subst_vars(0, _267556, [], _268496)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _267556, [], _268496)
^  Unify: (261) [user] subst_vars(0, _267556, [], _268496)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _267556, [], _268496)
^  Unify: (261) [user] subst_vars(0, _267556, [], _268496)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _267556, [], _268496)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _267558, [], _220876)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _267558, [], _220876)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1747, 0], [1747, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1747, 0], [";;", 1747, 0], [], [])
   Call: (258) [system] compound_name_arguments(_220874, '$COMMENT', [";;", 1747, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1747, 0), '$COMMENT', [";;", 1747, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1747, 0), '$COMMENT'(";;", 1747, 0), [], [])
   Call: (257) [system] _290914=metta_file_buffer(+, '$COMMENT'(";;", 1747, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1747, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1747, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1747, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1747, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1747, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1747, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1747, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1747, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1748, 0, 62146, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$stream_position'(62146, 1748, 0, 62180)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _343640))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _343640))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _343640)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _343640)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _343640)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _343640)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _349252))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _349252))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _349252))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _349252))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _349252)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _349252)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _354838))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _354838))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _354838)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _354838)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _354838)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _354838)
   Call: (270) [system] var('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _354838)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$VAR'(_362298))
   Call: (270) [system] atom('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _354838)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _354838)
   Call: (270) [system] '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _354838)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _354838)
   Call: (270) [system] '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _354838)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _354838)
   Call: (270) [system] '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0)==[_371578, _371584]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _354838)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _354838)
   Call: (270) [system] is_list('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _354838)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _354838)
   Call: (270) [system] string('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _354838)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _354838)
   Call: (270) [system] compound('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _381780, _381782)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT', [";;         !(get-doc some-func-no-type)", 1748, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         !(get-doc some-func-no-type)", 1748, 0], _385522)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(get-doc some-func-no-type)", 1748, 0], _385522)
   Call: (271) [apply] apply:maplist_([";;         !(get-doc some-func-no-type)", 1748, 0], _385522, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         !(get-doc some-func-no-type)", 1748, 0], [_388340|_388342], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         !(get-doc some-func-no-type)", _388340)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-func-no-type)", _388340)
   Call: (273) [system] var(";;         !(get-doc some-func-no-type)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-func-no-type)", _388340)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-func-no-type)", '$VAR'(_392986))
   Call: (273) [system] atom(";;         !(get-doc some-func-no-type)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-func-no-type)", _388340)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-func-no-type)", _388340)
   Call: (273) [system] ";;         !(get-doc some-func-no-type)"==true
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-func-no-type)", _388340)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-func-no-type)", _388340)
   Call: (273) [system] ";;         !(get-doc some-func-no-type)"==false
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-func-no-type)", _388340)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-func-no-type)", _388340)
   Call: (273) [system] ";;         !(get-doc some-func-no-type)"==[_402266, _402272]
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-func-no-type)", _388340)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-func-no-type)", _388340)
   Call: (273) [system] is_list(";;         !(get-doc some-func-no-type)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-func-no-type)", _388340)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-func-no-type)", _388340)
   Call: (273) [system] string(";;         !(get-doc some-func-no-type)")
   Exit: (273) [system] string(";;         !(get-doc some-func-no-type)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-func-no-type)", _388340)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-func-no-type)", _388340)
   Call: (273) [system] compound(";;         !(get-doc some-func-no-type)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-func-no-type)", _388340)
^  Unify: (272) [user] mfix_vars1(";;         !(get-doc some-func-no-type)", _388340)
^  Call: (273) [user] symbol(";;         !(get-doc some-func-no-type)")
^  Unify: (273) [user] symbol(";;         !(get-doc some-func-no-type)")
   Call: (274) [system] atom(";;         !(get-doc some-func-no-type)")
   Fail: (274) [system] atom(";;         !(get-doc some-func-no-type)")
^  Fail: (273) [user] symbol(";;         !(get-doc some-func-no-type)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-doc some-func-no-type)", _388340)
   Call: (273) [system] ";;         !(get-doc some-func-no-type)"=_388340
   Exit: (273) [system] ";;         !(get-doc some-func-no-type)"=";;         !(get-doc some-func-no-type)"
^  Exit: (272) [user] mfix_vars1(";;         !(get-doc some-func-no-type)", ";;         !(get-doc some-func-no-type)")
   Call: (272) [apply] apply:maplist_([1748, 0], _388342, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1748, 0], [_426338|_426340], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1748, _426338)
^  Unify: (273) [user] mfix_vars1(1748, _426338)
   Call: (274) [system] var(1748)
^  Redo: (273) [user] mfix_vars1(1748, _426338)
^  Unify: (273) [user] mfix_vars1(1748, '$VAR'(_430984))
   Call: (274) [system] atom(1748)
^  Redo: (273) [user] mfix_vars1(1748, _426338)
^  Unify: (273) [user] mfix_vars1(1748, _426338)
   Call: (274) [system] 1748==true
^  Redo: (273) [user] mfix_vars1(1748, _426338)
^  Unify: (273) [user] mfix_vars1(1748, _426338)
   Call: (274) [system] 1748==false
^  Redo: (273) [user] mfix_vars1(1748, _426338)
^  Unify: (273) [user] mfix_vars1(1748, _426338)
   Call: (274) [system] 1748==[_440264, _440270]
^  Redo: (273) [user] mfix_vars1(1748, _426338)
^  Unify: (273) [user] mfix_vars1(1748, _426338)
   Call: (274) [system] is_list(1748)
^  Redo: (273) [user] mfix_vars1(1748, _426338)
^  Unify: (273) [user] mfix_vars1(1748, _426338)
   Call: (274) [system] string(1748)
^  Redo: (273) [user] mfix_vars1(1748, _426338)
^  Unify: (273) [user] mfix_vars1(1748, _426338)
   Call: (274) [system] compound(1748)
^  Redo: (273) [user] mfix_vars1(1748, _426338)
^  Unify: (273) [user] mfix_vars1(1748, _426338)
^  Call: (274) [user] symbol(1748)
^  Unify: (274) [user] symbol(1748)
   Call: (275) [system] atom(1748)
   Fail: (275) [system] atom(1748)
^  Fail: (274) [user] symbol(1748)
^  Redo: (273) [user] mfix_vars1(1748, _426338)
   Call: (274) [system] 1748=_426338
   Exit: (274) [system] 1748=1748
^  Exit: (273) [user] mfix_vars1(1748, 1748)
   Call: (273) [apply] apply:maplist_([0], _426340, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_460664|_460666], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _460664)
^  Unify: (274) [user] mfix_vars1(0, _460664)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _460664)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_465310))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _460664)
^  Unify: (274) [user] mfix_vars1(0, _460664)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _460664)
^  Unify: (274) [user] mfix_vars1(0, _460664)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _460664)
^  Unify: (274) [user] mfix_vars1(0, _460664)
   Call: (275) [system] 0==[_474590, _474596]
^  Redo: (274) [user] mfix_vars1(0, _460664)
^  Unify: (274) [user] mfix_vars1(0, _460664)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _460664)
^  Unify: (274) [user] mfix_vars1(0, _460664)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _460664)
^  Unify: (274) [user] mfix_vars1(0, _460664)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _460664)
^  Unify: (274) [user] mfix_vars1(0, _460664)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _460664)
   Call: (275) [system] 0=_460664
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _460666, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1748, 0], [1748, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         !(get-doc some-func-no-type)", 1748, 0], [";;         !(get-doc some-func-no-type)", 1748, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(get-doc some-func-no-type)", 1748, 0], [";;         !(get-doc some-func-no-type)", 1748, 0])
   Call: (270) [system] compound_name_arguments(_354838, '$COMMENT', [";;         !(get-doc some-func-no-type)", 1748, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT', [";;         !(get-doc some-func-no-type)", 1748, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0)\=@='$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _349252)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _510838))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _510838))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _510838))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _510838))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _510838)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _510838)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _516424))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _516424))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _516424)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _516424)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _516424)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0)\=@='$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _5974)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _5952))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _5952))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _5952))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _5952))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _5952)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _20736))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _20736))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _20736)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _20736)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _20736)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0)\=@='$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0)))
   Call: (261) [system] '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0)\=@='$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _49514, [], _49516)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _49514, [], _49516)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _49514, [], _49516)
   Call: (258) [system] atom('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _49514, [], _49516)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _49514, [], _49516)
   Call: (258) [system] compound('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), _58830, _58832)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT', [";;         !(get-doc some-func-no-type)", 1748, 0])
^  Call: (258) [user] subst_vars([";;         !(get-doc some-func-no-type)", 1748, 0], _60716, [], _49516)
^  Unify: (258) [user] subst_vars([";;         !(get-doc some-func-no-type)", 1748, 0], [";;         !(get-doc some-func-no-type)", 1748, 0], [], [])
   Call: (259) [system] var([";;         !(get-doc some-func-no-type)", 1748, 0])
^  Redo: (258) [user] subst_vars([";;         !(get-doc some-func-no-type)", 1748, 0], _60716, [], _49516)
^  Unify: (258) [user] subst_vars([";;         !(get-doc some-func-no-type)", 1748, 0], [_64452|_64454], [], _49516)
^  Call: (259) [user] subst_vars(";;         !(get-doc some-func-no-type)", _64452, [], _65392)
^  Unify: (259) [user] subst_vars(";;         !(get-doc some-func-no-type)", ";;         !(get-doc some-func-no-type)", [], [])
   Call: (260) [system] var(";;         !(get-doc some-func-no-type)")
^  Redo: (259) [user] subst_vars(";;         !(get-doc some-func-no-type)", _64452, [], _65392)
^  Unify: (259) [user] subst_vars(";;         !(get-doc some-func-no-type)", _64452, [], _65392)
   Call: (260) [system] atom(";;         !(get-doc some-func-no-type)")
^  Redo: (259) [user] subst_vars(";;         !(get-doc some-func-no-type)", _64452, [], _65392)
^  Unify: (259) [user] subst_vars(";;         !(get-doc some-func-no-type)", _64452, [], _65392)
   Call: (260) [system] compound(";;         !(get-doc some-func-no-type)")
^  Redo: (259) [user] subst_vars(";;         !(get-doc some-func-no-type)", _64452, [], _65392)
^  Unify: (259) [user] subst_vars(";;         !(get-doc some-func-no-type)", ";;         !(get-doc some-func-no-type)", [], [])
^  Exit: (259) [user] subst_vars(";;         !(get-doc some-func-no-type)", ";;         !(get-doc some-func-no-type)", [], [])
^  Call: (259) [user] subst_vars([1748, 0], _64454, [], _49516)
^  Unify: (259) [user] subst_vars([1748, 0], [1748, 0], [], [])
   Call: (260) [system] var([1748, 0])
^  Redo: (259) [user] subst_vars([1748, 0], _64454, [], _49516)
^  Unify: (259) [user] subst_vars([1748, 0], [_80324|_80326], [], _49516)
^  Call: (260) [user] subst_vars(1748, _80324, [], _81264)
^  Unify: (260) [user] subst_vars(1748, 1748, [], [])
   Call: (261) [system] var(1748)
^  Redo: (260) [user] subst_vars(1748, _80324, [], _81264)
^  Unify: (260) [user] subst_vars(1748, _80324, [], _81264)
   Call: (261) [system] atom(1748)
^  Redo: (260) [user] subst_vars(1748, _80324, [], _81264)
^  Unify: (260) [user] subst_vars(1748, _80324, [], _81264)
   Call: (261) [system] compound(1748)
^  Redo: (260) [user] subst_vars(1748, _80324, [], _81264)
^  Unify: (260) [user] subst_vars(1748, 1748, [], [])
^  Exit: (260) [user] subst_vars(1748, 1748, [], [])
^  Call: (260) [user] subst_vars([0], _80326, [], _49516)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _80326, [], _49516)
^  Unify: (260) [user] subst_vars([0], [_96196|_96198], [], _49516)
^  Call: (261) [user] subst_vars(0, _96196, [], _97136)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _96196, [], _97136)
^  Unify: (261) [user] subst_vars(0, _96196, [], _97136)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _96196, [], _97136)
^  Unify: (261) [user] subst_vars(0, _96196, [], _97136)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _96196, [], _97136)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _96198, [], _49516)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _96198, [], _49516)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1748, 0], [1748, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         !(get-doc some-func-no-type)", 1748, 0], [";;         !(get-doc some-func-no-type)", 1748, 0], [], [])
   Call: (258) [system] compound_name_arguments(_49514, '$COMMENT', [";;         !(get-doc some-func-no-type)", 1748, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT', [";;         !(get-doc some-func-no-type)", 1748, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), [], [])
   Call: (257) [system] _119554=metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-doc some-func-no-type)", 1748, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1749, 0, 62186, '$COMMENT'(";;     \"#);", 1749, 0), '$stream_position'(62186, 1749, 0, 62220)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1749, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1749, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1749, 0), _172272))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1749, 0), _172272))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1749, 0), _172272)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     \"#);", 1749, 0), _172272)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     \"#);", 1749, 0), _172272)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     \"#);", 1749, 0), _172272)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1749, 0), _177884))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1749, 0), _177884))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1749, 0), _177884))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1749, 0), _177884))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1749, 0), _177884)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1749, 0), _177884)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     \"#);", 1749, 0), _183470))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     \"#);", 1749, 0), _183470))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     \"#);", 1749, 0), _183470)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     \"#);", 1749, 0), _183470)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1749, 0), _183470)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1749, 0), _183470)
   Call: (270) [system] var('$COMMENT'(";;     \"#);", 1749, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1749, 0), _183470)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1749, 0), '$VAR'(_190930))
   Call: (270) [system] atom('$COMMENT'(";;     \"#);", 1749, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1749, 0), _183470)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1749, 0), _183470)
   Call: (270) [system] '$COMMENT'(";;     \"#);", 1749, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1749, 0), _183470)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1749, 0), _183470)
   Call: (270) [system] '$COMMENT'(";;     \"#);", 1749, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1749, 0), _183470)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1749, 0), _183470)
   Call: (270) [system] '$COMMENT'(";;     \"#);", 1749, 0)==[_200210, _200216]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1749, 0), _183470)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1749, 0), _183470)
   Call: (270) [system] is_list('$COMMENT'(";;     \"#);", 1749, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1749, 0), _183470)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1749, 0), _183470)
   Call: (270) [system] string('$COMMENT'(";;     \"#);", 1749, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1749, 0), _183470)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1749, 0), _183470)
   Call: (270) [system] compound('$COMMENT'(";;     \"#);", 1749, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     \"#);", 1749, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1749, 0), _210412, _210414)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT', [";;     \"#);", 1749, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     \"#);", 1749, 0], _214154)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     \"#);", 1749, 0], _214154)
   Call: (271) [apply] apply:maplist_([";;     \"#);", 1749, 0], _214154, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     \"#);", 1749, 0], [_216972|_216974], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     \"#);", _216972)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _216972)
   Call: (273) [system] var(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _216972)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", '$VAR'(_221618))
   Call: (273) [system] atom(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _216972)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _216972)
   Call: (273) [system] ";;     \"#);"==true
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _216972)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _216972)
   Call: (273) [system] ";;     \"#);"==false
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _216972)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _216972)
   Call: (273) [system] ";;     \"#);"==[_230898, _230904]
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _216972)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _216972)
   Call: (273) [system] is_list(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _216972)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _216972)
   Call: (273) [system] string(";;     \"#);")
   Exit: (273) [system] string(";;     \"#);")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _216972)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _216972)
   Call: (273) [system] compound(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _216972)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _216972)
^  Call: (273) [user] symbol(";;     \"#);")
^  Unify: (273) [user] symbol(";;     \"#);")
   Call: (274) [system] atom(";;     \"#);")
   Fail: (274) [system] atom(";;     \"#);")
^  Fail: (273) [user] symbol(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _216972)
   Call: (273) [system] ";;     \"#);"=_216972
   Exit: (273) [system] ";;     \"#);"=";;     \"#);"
^  Exit: (272) [user] mfix_vars1(";;     \"#);", ";;     \"#);")
   Call: (272) [apply] apply:maplist_([1749, 0], _216974, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1749, 0], [_254970|_254972], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1749, _254970)
^  Unify: (273) [user] mfix_vars1(1749, _254970)
   Call: (274) [system] var(1749)
^  Redo: (273) [user] mfix_vars1(1749, _254970)
^  Unify: (273) [user] mfix_vars1(1749, '$VAR'(_259616))
   Call: (274) [system] atom(1749)
^  Redo: (273) [user] mfix_vars1(1749, _254970)
^  Unify: (273) [user] mfix_vars1(1749, _254970)
   Call: (274) [system] 1749==true
^  Redo: (273) [user] mfix_vars1(1749, _254970)
^  Unify: (273) [user] mfix_vars1(1749, _254970)
   Call: (274) [system] 1749==false
^  Redo: (273) [user] mfix_vars1(1749, _254970)
^  Unify: (273) [user] mfix_vars1(1749, _254970)
   Call: (274) [system] 1749==[_268896, _268902]
^  Redo: (273) [user] mfix_vars1(1749, _254970)
^  Unify: (273) [user] mfix_vars1(1749, _254970)
   Call: (274) [system] is_list(1749)
^  Redo: (273) [user] mfix_vars1(1749, _254970)
^  Unify: (273) [user] mfix_vars1(1749, _254970)
   Call: (274) [system] string(1749)
^  Redo: (273) [user] mfix_vars1(1749, _254970)
^  Unify: (273) [user] mfix_vars1(1749, _254970)
   Call: (274) [system] compound(1749)
^  Redo: (273) [user] mfix_vars1(1749, _254970)
^  Unify: (273) [user] mfix_vars1(1749, _254970)
^  Call: (274) [user] symbol(1749)
^  Unify: (274) [user] symbol(1749)
   Call: (275) [system] atom(1749)
   Fail: (275) [system] atom(1749)
^  Fail: (274) [user] symbol(1749)
^  Redo: (273) [user] mfix_vars1(1749, _254970)
   Call: (274) [system] 1749=_254970
   Exit: (274) [system] 1749=1749
^  Exit: (273) [user] mfix_vars1(1749, 1749)
   Call: (273) [apply] apply:maplist_([0], _254972, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_289296|_289298], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _289296)
^  Unify: (274) [user] mfix_vars1(0, _289296)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _289296)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_293942))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _289296)
^  Unify: (274) [user] mfix_vars1(0, _289296)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _289296)
^  Unify: (274) [user] mfix_vars1(0, _289296)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _289296)
^  Unify: (274) [user] mfix_vars1(0, _289296)
   Call: (275) [system] 0==[_303222, _303228]
^  Redo: (274) [user] mfix_vars1(0, _289296)
^  Unify: (274) [user] mfix_vars1(0, _289296)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _289296)
^  Unify: (274) [user] mfix_vars1(0, _289296)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _289296)
^  Unify: (274) [user] mfix_vars1(0, _289296)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _289296)
^  Unify: (274) [user] mfix_vars1(0, _289296)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _289296)
   Call: (275) [system] 0=_289296
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _289298, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1749, 0], [1749, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     \"#);", 1749, 0], [";;     \"#);", 1749, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     \"#);", 1749, 0], [";;     \"#);", 1749, 0])
   Call: (270) [system] compound_name_arguments(_183470, '$COMMENT', [";;     \"#);", 1749, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT', [";;     \"#);", 1749, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0)))
   Call: (267) [system] '$COMMENT'(";;     \"#);", 1749, 0)\=@='$COMMENT'(";;     \"#);", 1749, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1749, 0), _177884)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     \"#);", 1749, 0), _339470))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1749, 0), _339470))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1749, 0), _339470))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1749, 0), _339470))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1749, 0), _339470)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1749, 0), _339470)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     \"#);", 1749, 0), _345056))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     \"#);", 1749, 0), _345056))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     \"#);", 1749, 0), _345056)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     \"#);", 1749, 0), _345056)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     \"#);", 1749, 0), _345056)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0)))
   Call: (267) [system] '$COMMENT'(";;     \"#);", 1749, 0)\=@='$COMMENT'(";;     \"#);", 1749, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1749, 0), _339470)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     \"#);", 1749, 0), _172272))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1749, 0), _172272))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1749, 0), _172272))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1749, 0), _172272))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1749, 0), _172272)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1749, 0), _172272)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     \"#);", 1749, 0), _367376))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     \"#);", 1749, 0), _367376))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     \"#);", 1749, 0), _367376)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     \"#);", 1749, 0), _367376)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     \"#);", 1749, 0), _367376)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0)))
   Call: (267) [system] '$COMMENT'(";;     \"#);", 1749, 0)\=@='$COMMENT'(";;     \"#);", 1749, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1749, 0), _172272)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0)))
   Call: (261) [system] '$COMMENT'(";;     \"#);", 1749, 0)\=@='$COMMENT'(";;     \"#);", 1749, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1749, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1749, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1749, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1749, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1749, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1749, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1749, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1749, 0), _396154, [], _396156)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     \"#);", 1749, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1749, 0), _396154, [], _396156)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1749, 0), _396154, [], _396156)
   Call: (258) [system] atom('$COMMENT'(";;     \"#);", 1749, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1749, 0), _396154, [], _396156)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1749, 0), _396154, [], _396156)
   Call: (258) [system] compound('$COMMENT'(";;     \"#);", 1749, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     \"#);", 1749, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1749, 0), _405470, _405472)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT', [";;     \"#);", 1749, 0])
^  Call: (258) [user] subst_vars([";;     \"#);", 1749, 0], _407356, [], _396156)
^  Unify: (258) [user] subst_vars([";;     \"#);", 1749, 0], [";;     \"#);", 1749, 0], [], [])
   Call: (259) [system] var([";;     \"#);", 1749, 0])
^  Redo: (258) [user] subst_vars([";;     \"#);", 1749, 0], _407356, [], _396156)
^  Unify: (258) [user] subst_vars([";;     \"#);", 1749, 0], [_411092|_411094], [], _396156)
^  Call: (259) [user] subst_vars(";;     \"#);", _411092, [], _412032)
^  Unify: (259) [user] subst_vars(";;     \"#);", ";;     \"#);", [], [])
   Call: (260) [system] var(";;     \"#);")
^  Redo: (259) [user] subst_vars(";;     \"#);", _411092, [], _412032)
^  Unify: (259) [user] subst_vars(";;     \"#);", _411092, [], _412032)
   Call: (260) [system] atom(";;     \"#);")
^  Redo: (259) [user] subst_vars(";;     \"#);", _411092, [], _412032)
^  Unify: (259) [user] subst_vars(";;     \"#);", _411092, [], _412032)
   Call: (260) [system] compound(";;     \"#);")
^  Redo: (259) [user] subst_vars(";;     \"#);", _411092, [], _412032)
^  Unify: (259) [user] subst_vars(";;     \"#);", ";;     \"#);", [], [])
^  Exit: (259) [user] subst_vars(";;     \"#);", ";;     \"#);", [], [])
^  Call: (259) [user] subst_vars([1749, 0], _411094, [], _396156)
^  Unify: (259) [user] subst_vars([1749, 0], [1749, 0], [], [])
   Call: (260) [system] var([1749, 0])
^  Redo: (259) [user] subst_vars([1749, 0], _411094, [], _396156)
^  Unify: (259) [user] subst_vars([1749, 0], [_426964|_426966], [], _396156)
^  Call: (260) [user] subst_vars(1749, _426964, [], _427904)
^  Unify: (260) [user] subst_vars(1749, 1749, [], [])
   Call: (261) [system] var(1749)
^  Redo: (260) [user] subst_vars(1749, _426964, [], _427904)
^  Unify: (260) [user] subst_vars(1749, _426964, [], _427904)
   Call: (261) [system] atom(1749)
^  Redo: (260) [user] subst_vars(1749, _426964, [], _427904)
^  Unify: (260) [user] subst_vars(1749, _426964, [], _427904)
   Call: (261) [system] compound(1749)
^  Redo: (260) [user] subst_vars(1749, _426964, [], _427904)
^  Unify: (260) [user] subst_vars(1749, 1749, [], [])
^  Exit: (260) [user] subst_vars(1749, 1749, [], [])
^  Call: (260) [user] subst_vars([0], _426966, [], _396156)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _426966, [], _396156)
^  Unify: (260) [user] subst_vars([0], [_442836|_442838], [], _396156)
^  Call: (261) [user] subst_vars(0, _442836, [], _443776)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _442836, [], _443776)
^  Unify: (261) [user] subst_vars(0, _442836, [], _443776)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _442836, [], _443776)
^  Unify: (261) [user] subst_vars(0, _442836, [], _443776)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _442836, [], _443776)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _442838, [], _396156)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _442838, [], _396156)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1749, 0], [1749, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     \"#);", 1749, 0], [";;     \"#);", 1749, 0], [], [])
   Call: (258) [system] compound_name_arguments(_396154, '$COMMENT', [";;     \"#);", 1749, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT', [";;     \"#);", 1749, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1749, 0), '$COMMENT'(";;     \"#);", 1749, 0), [], [])
   Call: (257) [system] _466194=metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1749, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1749, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1749, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1749, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1749, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1749, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1749, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1749, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1749, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1750, 0, 62198, '$COMMENT'(";;", 1750, 0), '$stream_position'(62198, 1750, 0, 62232)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1750, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1750, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1750, 0), _518910))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1750, 0), _518910))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1750, 0), _518910)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1750, 0), _518910)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1750, 0), _518910)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1750, 0), _5942)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1750, 0), _6560))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1750, 0), _6560))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1750, 0), _6560))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1750, 0), _6560))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1750, 0), _6560)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1750, 0), _6560)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1750, 0), _12146))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1750, 0), _12146))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1750, 0), _12146)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1750, 0), _12146)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1750, 0), _12146)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1750, 0), _12146)
   Call: (270) [system] var('$COMMENT'(";;", 1750, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1750, 0), _12146)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1750, 0), '$VAR'(_19606))
   Call: (270) [system] atom('$COMMENT'(";;", 1750, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1750, 0), _12146)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1750, 0), _12146)
   Call: (270) [system] '$COMMENT'(";;", 1750, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1750, 0), _12146)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1750, 0), _12146)
   Call: (270) [system] '$COMMENT'(";;", 1750, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1750, 0), _12146)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1750, 0), _12146)
   Call: (270) [system] '$COMMENT'(";;", 1750, 0)==[_28886, _28892]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1750, 0), _12146)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1750, 0), _12146)
   Call: (270) [system] is_list('$COMMENT'(";;", 1750, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1750, 0), _12146)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1750, 0), _12146)
   Call: (270) [system] string('$COMMENT'(";;", 1750, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1750, 0), _12146)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1750, 0), _12146)
   Call: (270) [system] compound('$COMMENT'(";;", 1750, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1750, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1750, 0), _39088, _39090)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1750, 0), '$COMMENT', [";;", 1750, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1750, 0], _42830)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1750, 0], _42830)
   Call: (271) [apply] apply:maplist_([";;", 1750, 0], _42830, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1750, 0], [_45648|_45650], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _45648)
^  Unify: (272) [user] mfix_vars1(";;", _45648)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _45648)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_50294))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _45648)
^  Unify: (272) [user] mfix_vars1(";;", _45648)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _45648)
^  Unify: (272) [user] mfix_vars1(";;", _45648)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _45648)
^  Unify: (272) [user] mfix_vars1(";;", _45648)
   Call: (273) [system] ";;"==[_59574, _59580]
^  Redo: (272) [user] mfix_vars1(";;", _45648)
^  Unify: (272) [user] mfix_vars1(";;", _45648)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _45648)
^  Unify: (272) [user] mfix_vars1(";;", _45648)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _45648)
^  Unify: (272) [user] mfix_vars1(";;", _45648)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _45648)
^  Unify: (272) [user] mfix_vars1(";;", _45648)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _45648)
   Call: (273) [system] ";;"=_45648
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1750, 0], _45650, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1750, 0], [_83646|_83648], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1750, _83646)
^  Unify: (273) [user] mfix_vars1(1750, _83646)
   Call: (274) [system] var(1750)
^  Redo: (273) [user] mfix_vars1(1750, _83646)
^  Unify: (273) [user] mfix_vars1(1750, '$VAR'(_88292))
   Call: (274) [system] atom(1750)
^  Redo: (273) [user] mfix_vars1(1750, _83646)
^  Unify: (273) [user] mfix_vars1(1750, _83646)
   Call: (274) [system] 1750==true
^  Redo: (273) [user] mfix_vars1(1750, _83646)
^  Unify: (273) [user] mfix_vars1(1750, _83646)
   Call: (274) [system] 1750==false
^  Redo: (273) [user] mfix_vars1(1750, _83646)
^  Unify: (273) [user] mfix_vars1(1750, _83646)
   Call: (274) [system] 1750==[_97572, _97578]
^  Redo: (273) [user] mfix_vars1(1750, _83646)
^  Unify: (273) [user] mfix_vars1(1750, _83646)
   Call: (274) [system] is_list(1750)
^  Redo: (273) [user] mfix_vars1(1750, _83646)
^  Unify: (273) [user] mfix_vars1(1750, _83646)
   Call: (274) [system] string(1750)
^  Redo: (273) [user] mfix_vars1(1750, _83646)
^  Unify: (273) [user] mfix_vars1(1750, _83646)
   Call: (274) [system] compound(1750)
^  Redo: (273) [user] mfix_vars1(1750, _83646)
^  Unify: (273) [user] mfix_vars1(1750, _83646)
^  Call: (274) [user] symbol(1750)
^  Unify: (274) [user] symbol(1750)
   Call: (275) [system] atom(1750)
   Fail: (275) [system] atom(1750)
^  Fail: (274) [user] symbol(1750)
^  Redo: (273) [user] mfix_vars1(1750, _83646)
   Call: (274) [system] 1750=_83646
   Exit: (274) [system] 1750=1750
^  Exit: (273) [user] mfix_vars1(1750, 1750)
   Call: (273) [apply] apply:maplist_([0], _83648, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_117972|_117974], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _117972)
^  Unify: (274) [user] mfix_vars1(0, _117972)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _117972)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_122618))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _117972)
^  Unify: (274) [user] mfix_vars1(0, _117972)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _117972)
^  Unify: (274) [user] mfix_vars1(0, _117972)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _117972)
^  Unify: (274) [user] mfix_vars1(0, _117972)
   Call: (275) [system] 0==[_131898, _131904]
^  Redo: (274) [user] mfix_vars1(0, _117972)
^  Unify: (274) [user] mfix_vars1(0, _117972)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _117972)
^  Unify: (274) [user] mfix_vars1(0, _117972)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _117972)
^  Unify: (274) [user] mfix_vars1(0, _117972)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _117972)
^  Unify: (274) [user] mfix_vars1(0, _117972)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _117972)
   Call: (275) [system] 0=_117972
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _117974, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1750, 0], [1750, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1750, 0], [";;", 1750, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1750, 0], [";;", 1750, 0])
   Call: (270) [system] compound_name_arguments(_12146, '$COMMENT', [";;", 1750, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1750, 0), '$COMMENT', [";;", 1750, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1750, 0)\=@='$COMMENT'(";;", 1750, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1750, 0), _6560)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1750, 0), _168146))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1750, 0), _168146))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1750, 0), _168146))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1750, 0), _168146))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1750, 0), _168146)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1750, 0), _168146)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1750, 0), _173732))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1750, 0), _173732))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1750, 0), _173732)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1750, 0), _173732)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1750, 0), _173732)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1750, 0)\=@='$COMMENT'(";;", 1750, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1750, 0), _168146)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1750, 0), _5942))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1750, 0), _5942))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1750, 0), _5942))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1750, 0), _5942))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1750, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1750, 0), _5942)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1750, 0), _196052))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1750, 0), _196052))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1750, 0), _196052)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1750, 0), _196052)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1750, 0), _196052)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1750, 0)\=@='$COMMENT'(";;", 1750, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1750, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1750, 0)\=@='$COMMENT'(";;", 1750, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1750, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1750, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1750, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1750, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1750, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1750, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1750, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1750, 0), _224830, [], _224832)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1750, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1750, 0), _224830, [], _224832)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1750, 0), _224830, [], _224832)
   Call: (258) [system] atom('$COMMENT'(";;", 1750, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1750, 0), _224830, [], _224832)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1750, 0), _224830, [], _224832)
   Call: (258) [system] compound('$COMMENT'(";;", 1750, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1750, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1750, 0), _234146, _234148)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1750, 0), '$COMMENT', [";;", 1750, 0])
^  Call: (258) [user] subst_vars([";;", 1750, 0], _236032, [], _224832)
^  Unify: (258) [user] subst_vars([";;", 1750, 0], [";;", 1750, 0], [], [])
   Call: (259) [system] var([";;", 1750, 0])
^  Redo: (258) [user] subst_vars([";;", 1750, 0], _236032, [], _224832)
^  Unify: (258) [user] subst_vars([";;", 1750, 0], [_239768|_239770], [], _224832)
^  Call: (259) [user] subst_vars(";;", _239768, [], _240708)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _239768, [], _240708)
^  Unify: (259) [user] subst_vars(";;", _239768, [], _240708)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _239768, [], _240708)
^  Unify: (259) [user] subst_vars(";;", _239768, [], _240708)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _239768, [], _240708)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1750, 0], _239770, [], _224832)
^  Unify: (259) [user] subst_vars([1750, 0], [1750, 0], [], [])
   Call: (260) [system] var([1750, 0])
^  Redo: (259) [user] subst_vars([1750, 0], _239770, [], _224832)
^  Unify: (259) [user] subst_vars([1750, 0], [_255640|_255642], [], _224832)
^  Call: (260) [user] subst_vars(1750, _255640, [], _256580)
^  Unify: (260) [user] subst_vars(1750, 1750, [], [])
   Call: (261) [system] var(1750)
^  Redo: (260) [user] subst_vars(1750, _255640, [], _256580)
^  Unify: (260) [user] subst_vars(1750, _255640, [], _256580)
   Call: (261) [system] atom(1750)
^  Redo: (260) [user] subst_vars(1750, _255640, [], _256580)
^  Unify: (260) [user] subst_vars(1750, _255640, [], _256580)
   Call: (261) [system] compound(1750)
^  Redo: (260) [user] subst_vars(1750, _255640, [], _256580)
^  Unify: (260) [user] subst_vars(1750, 1750, [], [])
^  Exit: (260) [user] subst_vars(1750, 1750, [], [])
^  Call: (260) [user] subst_vars([0], _255642, [], _224832)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _255642, [], _224832)
^  Unify: (260) [user] subst_vars([0], [_271512|_271514], [], _224832)
^  Call: (261) [user] subst_vars(0, _271512, [], _272452)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _271512, [], _272452)
^  Unify: (261) [user] subst_vars(0, _271512, [], _272452)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _271512, [], _272452)
^  Unify: (261) [user] subst_vars(0, _271512, [], _272452)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _271512, [], _272452)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _271514, [], _224832)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _271514, [], _224832)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1750, 0], [1750, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1750, 0], [";;", 1750, 0], [], [])
   Call: (258) [system] compound_name_arguments(_224830, '$COMMENT', [";;", 1750, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1750, 0), '$COMMENT', [";;", 1750, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1750, 0), '$COMMENT'(";;", 1750, 0), [], [])
   Call: (257) [system] _294870=metta_file_buffer(+, '$COMMENT'(";;", 1750, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1750, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1750, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1750, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1750, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1750, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1750, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1750, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1750, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1751, 0, 62201, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$stream_position'(62201, 1751, 0, 62235)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _347600))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _347600))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _347600)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _347600)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _347600)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _347600)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _353212))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _353212))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _353212))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _353212))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _353212)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _353212)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _358798))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _358798))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _358798)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _358798)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _358798)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _358798)
   Call: (270) [system] var('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _358798)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$VAR'(_366258))
   Call: (270) [system] atom('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _358798)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _358798)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _358798)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _358798)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _358798)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _358798)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0)==[_375538, _375544]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _358798)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _358798)
   Call: (270) [system] is_list('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _358798)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _358798)
   Call: (270) [system] string('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _358798)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _358798)
   Call: (270) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _385740, _385742)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0], _389482)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0], _389482)
   Call: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0], _389482, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0], [_392300|_392302], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _392300)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _392300)
   Call: (273) [system] var(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _392300)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", '$VAR'(_396946))
   Call: (273) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _392300)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _392300)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["==true
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _392300)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _392300)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["==false
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _392300)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _392300)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["==[_406226, _406232]
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _392300)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _392300)
   Call: (273) [system] is_list(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _392300)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _392300)
   Call: (273) [system] string(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Exit: (273) [system] string(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _392300)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _392300)
   Call: (273) [system] compound(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _392300)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _392300)
^  Call: (273) [user] symbol(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Unify: (273) [user] symbol(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Call: (274) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Fail: (274) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Fail: (273) [user] symbol(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _392300)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["=_392300
   Exit: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["=";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["
^  Exit: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Call: (272) [apply] apply:maplist_([1751, 0], _392302, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1751, 0], [_430298|_430300], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1751, _430298)
^  Unify: (273) [user] mfix_vars1(1751, _430298)
   Call: (274) [system] var(1751)
^  Redo: (273) [user] mfix_vars1(1751, _430298)
^  Unify: (273) [user] mfix_vars1(1751, '$VAR'(_434944))
   Call: (274) [system] atom(1751)
^  Redo: (273) [user] mfix_vars1(1751, _430298)
^  Unify: (273) [user] mfix_vars1(1751, _430298)
   Call: (274) [system] 1751==true
^  Redo: (273) [user] mfix_vars1(1751, _430298)
^  Unify: (273) [user] mfix_vars1(1751, _430298)
   Call: (274) [system] 1751==false
^  Redo: (273) [user] mfix_vars1(1751, _430298)
^  Unify: (273) [user] mfix_vars1(1751, _430298)
   Call: (274) [system] 1751==[_444224, _444230]
^  Redo: (273) [user] mfix_vars1(1751, _430298)
^  Unify: (273) [user] mfix_vars1(1751, _430298)
   Call: (274) [system] is_list(1751)
^  Redo: (273) [user] mfix_vars1(1751, _430298)
^  Unify: (273) [user] mfix_vars1(1751, _430298)
   Call: (274) [system] string(1751)
^  Redo: (273) [user] mfix_vars1(1751, _430298)
^  Unify: (273) [user] mfix_vars1(1751, _430298)
   Call: (274) [system] compound(1751)
^  Redo: (273) [user] mfix_vars1(1751, _430298)
^  Unify: (273) [user] mfix_vars1(1751, _430298)
^  Call: (274) [user] symbol(1751)
^  Unify: (274) [user] symbol(1751)
   Call: (275) [system] atom(1751)
   Fail: (275) [system] atom(1751)
^  Fail: (274) [user] symbol(1751)
^  Redo: (273) [user] mfix_vars1(1751, _430298)
   Call: (274) [system] 1751=_430298
   Exit: (274) [system] 1751=1751
^  Exit: (273) [user] mfix_vars1(1751, 1751)
   Call: (273) [apply] apply:maplist_([0], _430300, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_464624|_464626], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _464624)
^  Unify: (274) [user] mfix_vars1(0, _464624)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _464624)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_469270))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _464624)
^  Unify: (274) [user] mfix_vars1(0, _464624)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _464624)
^  Unify: (274) [user] mfix_vars1(0, _464624)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _464624)
^  Unify: (274) [user] mfix_vars1(0, _464624)
   Call: (275) [system] 0==[_478550, _478556]
^  Redo: (274) [user] mfix_vars1(0, _464624)
^  Unify: (274) [user] mfix_vars1(0, _464624)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _464624)
^  Unify: (274) [user] mfix_vars1(0, _464624)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _464624)
^  Unify: (274) [user] mfix_vars1(0, _464624)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _464624)
^  Unify: (274) [user] mfix_vars1(0, _464624)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _464624)
   Call: (275) [system] 0=_464624
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _464626, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1751, 0], [1751, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0])
   Call: (270) [system] compound_name_arguments(_358798, '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _353212)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _514798))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _514798))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _514798))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _514798))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _514798)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _514798)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _520384))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _520384))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _520384)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _520384)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _5992)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _5978)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _5956))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _5956))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _5956))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _5956))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _5956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _5956)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _24542))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _24542))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _24542)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _24542)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _24542)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _5956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0)))
   Call: (261) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _53320, [], _53322)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _53320, [], _53322)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _53320, [], _53322)
   Call: (258) [system] atom('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _53320, [], _53322)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _53320, [], _53322)
   Call: (258) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), _62636, _62638)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0])
^  Call: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0], _64522, [], _53322)
^  Unify: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0], [], [])
   Call: (259) [system] var([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0])
^  Redo: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0], _64522, [], _53322)
^  Unify: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0], [_68258|_68260], [], _53322)
^  Call: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _68258, [], _69198)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", [], [])
   Call: (260) [system] var(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _68258, [], _69198)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _68258, [], _69198)
   Call: (260) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _68258, [], _69198)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _68258, [], _69198)
   Call: (260) [system] compound(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _68258, [], _69198)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", [], [])
^  Exit: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", [], [])
^  Call: (259) [user] subst_vars([1751, 0], _68260, [], _53322)
^  Unify: (259) [user] subst_vars([1751, 0], [1751, 0], [], [])
   Call: (260) [system] var([1751, 0])
^  Redo: (259) [user] subst_vars([1751, 0], _68260, [], _53322)
^  Unify: (259) [user] subst_vars([1751, 0], [_84130|_84132], [], _53322)
^  Call: (260) [user] subst_vars(1751, _84130, [], _85070)
^  Unify: (260) [user] subst_vars(1751, 1751, [], [])
   Call: (261) [system] var(1751)
^  Redo: (260) [user] subst_vars(1751, _84130, [], _85070)
^  Unify: (260) [user] subst_vars(1751, _84130, [], _85070)
   Call: (261) [system] atom(1751)
^  Redo: (260) [user] subst_vars(1751, _84130, [], _85070)
^  Unify: (260) [user] subst_vars(1751, _84130, [], _85070)
   Call: (261) [system] compound(1751)
^  Redo: (260) [user] subst_vars(1751, _84130, [], _85070)
^  Unify: (260) [user] subst_vars(1751, 1751, [], [])
^  Exit: (260) [user] subst_vars(1751, 1751, [], [])
^  Call: (260) [user] subst_vars([0], _84132, [], _53322)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _84132, [], _53322)
^  Unify: (260) [user] subst_vars([0], [_100002|_100004], [], _53322)
^  Call: (261) [user] subst_vars(0, _100002, [], _100942)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _100002, [], _100942)
^  Unify: (261) [user] subst_vars(0, _100002, [], _100942)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _100002, [], _100942)
^  Unify: (261) [user] subst_vars(0, _100002, [], _100942)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _100002, [], _100942)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _100004, [], _53322)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _100004, [], _53322)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1751, 0], [1751, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0], [], [])
   Call: (258) [system] compound_name_arguments(_53320, '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), [], [])
   Call: (257) [system] _123360=metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1751, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1752, 0, 62261, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$stream_position'(62261, 1752, 0, 62295)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _176084))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _176084))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _176084)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _176084)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _176084)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _176084)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _181696))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _181696))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _181696))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _181696))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _181696)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _181696)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _187282))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _187282))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _187282)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _187282)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _187282)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _187282)
   Call: (270) [system] var('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _187282)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$VAR'(_194742))
   Call: (270) [system] atom('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _187282)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _187282)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _187282)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _187282)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _187282)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _187282)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0)==[_204022, _204028]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _187282)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _187282)
   Call: (270) [system] is_list('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _187282)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _187282)
   Call: (270) [system] string('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _187282)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _187282)
   Call: (270) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _214224, _214226)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1752, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         vec![expr!(\"@doc-formal\"", 1752, 0], _217966)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         vec![expr!(\"@doc-formal\"", 1752, 0], _217966)
   Call: (271) [apply] apply:maplist_([";;         vec![expr!(\"@doc-formal\"", 1752, 0], _217966, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         vec![expr!(\"@doc-formal\"", 1752, 0], [_220784|_220786], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _220784)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _220784)
   Call: (273) [system] var(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _220784)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", '$VAR'(_225430))
   Call: (273) [system] atom(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _220784)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _220784)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""==true
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _220784)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _220784)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""==false
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _220784)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _220784)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""==[_234710, _234716]
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _220784)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _220784)
   Call: (273) [system] is_list(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _220784)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _220784)
   Call: (273) [system] string(";;         vec![expr!(\"@doc-formal\"")
   Exit: (273) [system] string(";;         vec![expr!(\"@doc-formal\"")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _220784)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _220784)
   Call: (273) [system] compound(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _220784)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _220784)
^  Call: (273) [user] symbol(";;         vec![expr!(\"@doc-formal\"")
^  Unify: (273) [user] symbol(";;         vec![expr!(\"@doc-formal\"")
   Call: (274) [system] atom(";;         vec![expr!(\"@doc-formal\"")
   Fail: (274) [system] atom(";;         vec![expr!(\"@doc-formal\"")
^  Fail: (273) [user] symbol(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", _220784)
   Call: (273) [system] ";;         vec![expr!(\"@doc-formal\""=_220784
   Exit: (273) [system] ";;         vec![expr!(\"@doc-formal\""=";;         vec![expr!(\"@doc-formal\""
^  Exit: (272) [user] mfix_vars1(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"")
   Call: (272) [apply] apply:maplist_([1752, 0], _220786, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1752, 0], [_258782|_258784], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1752, _258782)
^  Unify: (273) [user] mfix_vars1(1752, _258782)
   Call: (274) [system] var(1752)
^  Redo: (273) [user] mfix_vars1(1752, _258782)
^  Unify: (273) [user] mfix_vars1(1752, '$VAR'(_263428))
   Call: (274) [system] atom(1752)
^  Redo: (273) [user] mfix_vars1(1752, _258782)
^  Unify: (273) [user] mfix_vars1(1752, _258782)
   Call: (274) [system] 1752==true
^  Redo: (273) [user] mfix_vars1(1752, _258782)
^  Unify: (273) [user] mfix_vars1(1752, _258782)
   Call: (274) [system] 1752==false
^  Redo: (273) [user] mfix_vars1(1752, _258782)
^  Unify: (273) [user] mfix_vars1(1752, _258782)
   Call: (274) [system] 1752==[_272708, _272714]
^  Redo: (273) [user] mfix_vars1(1752, _258782)
^  Unify: (273) [user] mfix_vars1(1752, _258782)
   Call: (274) [system] is_list(1752)
^  Redo: (273) [user] mfix_vars1(1752, _258782)
^  Unify: (273) [user] mfix_vars1(1752, _258782)
   Call: (274) [system] string(1752)
^  Redo: (273) [user] mfix_vars1(1752, _258782)
^  Unify: (273) [user] mfix_vars1(1752, _258782)
   Call: (274) [system] compound(1752)
^  Redo: (273) [user] mfix_vars1(1752, _258782)
^  Unify: (273) [user] mfix_vars1(1752, _258782)
^  Call: (274) [user] symbol(1752)
^  Unify: (274) [user] symbol(1752)
   Call: (275) [system] atom(1752)
   Fail: (275) [system] atom(1752)
^  Fail: (274) [user] symbol(1752)
^  Redo: (273) [user] mfix_vars1(1752, _258782)
   Call: (274) [system] 1752=_258782
   Exit: (274) [system] 1752=1752
^  Exit: (273) [user] mfix_vars1(1752, 1752)
   Call: (273) [apply] apply:maplist_([0], _258784, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_293108|_293110], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _293108)
^  Unify: (274) [user] mfix_vars1(0, _293108)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _293108)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_297754))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _293108)
^  Unify: (274) [user] mfix_vars1(0, _293108)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _293108)
^  Unify: (274) [user] mfix_vars1(0, _293108)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _293108)
^  Unify: (274) [user] mfix_vars1(0, _293108)
   Call: (275) [system] 0==[_307034, _307040]
^  Redo: (274) [user] mfix_vars1(0, _293108)
^  Unify: (274) [user] mfix_vars1(0, _293108)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _293108)
^  Unify: (274) [user] mfix_vars1(0, _293108)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _293108)
^  Unify: (274) [user] mfix_vars1(0, _293108)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _293108)
^  Unify: (274) [user] mfix_vars1(0, _293108)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _293108)
   Call: (275) [system] 0=_293108
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _293110, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1752, 0], [1752, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         vec![expr!(\"@doc-formal\"", 1752, 0], [";;         vec![expr!(\"@doc-formal\"", 1752, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         vec![expr!(\"@doc-formal\"", 1752, 0], [";;         vec![expr!(\"@doc-formal\"", 1752, 0])
   Call: (270) [system] compound_name_arguments(_187282, '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1752, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1752, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _181696)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _343282))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _343282))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _343282))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _343282))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _343282)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _343282)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _348868))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _348868))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _348868)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _348868)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _348868)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _343282)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _176084))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _176084))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _176084))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _176084))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _176084)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _176084)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _371188))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _371188))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _371188)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _371188)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _371188)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _176084)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0)))
   Call: (261) [system] '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0)\=@='$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _399966, [], _399968)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _399966, [], _399968)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _399966, [], _399968)
   Call: (258) [system] atom('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _399966, [], _399968)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _399966, [], _399968)
   Call: (258) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), _409282, _409284)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1752, 0])
^  Call: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1752, 0], _411168, [], _399968)
^  Unify: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1752, 0], [";;         vec![expr!(\"@doc-formal\"", 1752, 0], [], [])
   Call: (259) [system] var([";;         vec![expr!(\"@doc-formal\"", 1752, 0])
^  Redo: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1752, 0], _411168, [], _399968)
^  Unify: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1752, 0], [_414904|_414906], [], _399968)
^  Call: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _414904, [], _415844)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"", [], [])
   Call: (260) [system] var(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _414904, [], _415844)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _414904, [], _415844)
   Call: (260) [system] atom(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _414904, [], _415844)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _414904, [], _415844)
   Call: (260) [system] compound(";;         vec![expr!(\"@doc-formal\"")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", _414904, [], _415844)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"", [], [])
^  Exit: (259) [user] subst_vars(";;         vec![expr!(\"@doc-formal\"", ";;         vec![expr!(\"@doc-formal\"", [], [])
^  Call: (259) [user] subst_vars([1752, 0], _414906, [], _399968)
^  Unify: (259) [user] subst_vars([1752, 0], [1752, 0], [], [])
   Call: (260) [system] var([1752, 0])
^  Redo: (259) [user] subst_vars([1752, 0], _414906, [], _399968)
^  Unify: (259) [user] subst_vars([1752, 0], [_430776|_430778], [], _399968)
^  Call: (260) [user] subst_vars(1752, _430776, [], _431716)
^  Unify: (260) [user] subst_vars(1752, 1752, [], [])
   Call: (261) [system] var(1752)
^  Redo: (260) [user] subst_vars(1752, _430776, [], _431716)
^  Unify: (260) [user] subst_vars(1752, _430776, [], _431716)
   Call: (261) [system] atom(1752)
^  Redo: (260) [user] subst_vars(1752, _430776, [], _431716)
^  Unify: (260) [user] subst_vars(1752, _430776, [], _431716)
   Call: (261) [system] compound(1752)
^  Redo: (260) [user] subst_vars(1752, _430776, [], _431716)
^  Unify: (260) [user] subst_vars(1752, 1752, [], [])
^  Exit: (260) [user] subst_vars(1752, 1752, [], [])
^  Call: (260) [user] subst_vars([0], _430778, [], _399968)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _430778, [], _399968)
^  Unify: (260) [user] subst_vars([0], [_446648|_446650], [], _399968)
^  Call: (261) [user] subst_vars(0, _446648, [], _447588)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _446648, [], _447588)
^  Unify: (261) [user] subst_vars(0, _446648, [], _447588)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _446648, [], _447588)
^  Unify: (261) [user] subst_vars(0, _446648, [], _447588)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _446648, [], _447588)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _446650, [], _399968)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _446650, [], _399968)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1752, 0], [1752, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         vec![expr!(\"@doc-formal\"", 1752, 0], [";;         vec![expr!(\"@doc-formal\"", 1752, 0], [], [])
   Call: (258) [system] compound_name_arguments(_399966, '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1752, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT', [";;         vec![expr!(\"@doc-formal\"", 1752, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), [], [])
   Call: (257) [system] _470006=metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"@doc-formal\"", 1752, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1753, 0, 62297, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$stream_position'(62297, 1753, 0, 62331)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _522732))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _5952))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _5952)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _5952)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _5952)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _5952)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _10368))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _10368))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _10368))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _10368))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _10368)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _10368)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _15954))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _15954))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _15954)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _15954)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _15954)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _15954)
   Call: (270) [system] var('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _15954)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$VAR'(_23414))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _15954)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _15954)
   Call: (270) [system] '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _15954)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _15954)
   Call: (270) [system] '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _15954)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _15954)
   Call: (270) [system] '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0)==[_32694, _32700]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _15954)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _15954)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _15954)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _15954)
   Call: (270) [system] string('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _15954)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _15954)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _42896, _42898)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT', [";;             (\"@item\" \"some-func-no-type\")", 1753, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@item\" \"some-func-no-type\")", 1753, 0], _46638)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@item\" \"some-func-no-type\")", 1753, 0], _46638)
   Call: (271) [apply] apply:maplist_([";;             (\"@item\" \"some-func-no-type\")", 1753, 0], _46638, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@item\" \"some-func-no-type\")", 1753, 0], [_49456|_49458], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func-no-type\")", _49456)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func-no-type\")", _49456)
   Call: (273) [system] var(";;             (\"@item\" \"some-func-no-type\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func-no-type\")", _49456)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func-no-type\")", '$VAR'(_54102))
   Call: (273) [system] atom(";;             (\"@item\" \"some-func-no-type\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func-no-type\")", _49456)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func-no-type\")", _49456)
   Call: (273) [system] ";;             (\"@item\" \"some-func-no-type\")"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func-no-type\")", _49456)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func-no-type\")", _49456)
   Call: (273) [system] ";;             (\"@item\" \"some-func-no-type\")"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func-no-type\")", _49456)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func-no-type\")", _49456)
   Call: (273) [system] ";;             (\"@item\" \"some-func-no-type\")"==[_63382, _63388]
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func-no-type\")", _49456)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func-no-type\")", _49456)
   Call: (273) [system] is_list(";;             (\"@item\" \"some-func-no-type\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func-no-type\")", _49456)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func-no-type\")", _49456)
   Call: (273) [system] string(";;             (\"@item\" \"some-func-no-type\")")
   Exit: (273) [system] string(";;             (\"@item\" \"some-func-no-type\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func-no-type\")", _49456)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func-no-type\")", _49456)
   Call: (273) [system] compound(";;             (\"@item\" \"some-func-no-type\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func-no-type\")", _49456)
^  Unify: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func-no-type\")", _49456)
^  Call: (273) [user] symbol(";;             (\"@item\" \"some-func-no-type\")")
^  Unify: (273) [user] symbol(";;             (\"@item\" \"some-func-no-type\")")
   Call: (274) [system] atom(";;             (\"@item\" \"some-func-no-type\")")
   Fail: (274) [system] atom(";;             (\"@item\" \"some-func-no-type\")")
^  Fail: (273) [user] symbol(";;             (\"@item\" \"some-func-no-type\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func-no-type\")", _49456)
   Call: (273) [system] ";;             (\"@item\" \"some-func-no-type\")"=_49456
   Exit: (273) [system] ";;             (\"@item\" \"some-func-no-type\")"=";;             (\"@item\" \"some-func-no-type\")"
^  Exit: (272) [user] mfix_vars1(";;             (\"@item\" \"some-func-no-type\")", ";;             (\"@item\" \"some-func-no-type\")")
   Call: (272) [apply] apply:maplist_([1753, 0], _49458, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1753, 0], [_87454|_87456], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1753, _87454)
^  Unify: (273) [user] mfix_vars1(1753, _87454)
   Call: (274) [system] var(1753)
^  Redo: (273) [user] mfix_vars1(1753, _87454)
^  Unify: (273) [user] mfix_vars1(1753, '$VAR'(_92100))
   Call: (274) [system] atom(1753)
^  Redo: (273) [user] mfix_vars1(1753, _87454)
^  Unify: (273) [user] mfix_vars1(1753, _87454)
   Call: (274) [system] 1753==true
^  Redo: (273) [user] mfix_vars1(1753, _87454)
^  Unify: (273) [user] mfix_vars1(1753, _87454)
   Call: (274) [system] 1753==false
^  Redo: (273) [user] mfix_vars1(1753, _87454)
^  Unify: (273) [user] mfix_vars1(1753, _87454)
   Call: (274) [system] 1753==[_101380, _101386]
^  Redo: (273) [user] mfix_vars1(1753, _87454)
^  Unify: (273) [user] mfix_vars1(1753, _87454)
   Call: (274) [system] is_list(1753)
^  Redo: (273) [user] mfix_vars1(1753, _87454)
^  Unify: (273) [user] mfix_vars1(1753, _87454)
   Call: (274) [system] string(1753)
^  Redo: (273) [user] mfix_vars1(1753, _87454)
^  Unify: (273) [user] mfix_vars1(1753, _87454)
   Call: (274) [system] compound(1753)
^  Redo: (273) [user] mfix_vars1(1753, _87454)
^  Unify: (273) [user] mfix_vars1(1753, _87454)
^  Call: (274) [user] symbol(1753)
^  Unify: (274) [user] symbol(1753)
   Call: (275) [system] atom(1753)
   Fail: (275) [system] atom(1753)
^  Fail: (274) [user] symbol(1753)
^  Redo: (273) [user] mfix_vars1(1753, _87454)
   Call: (274) [system] 1753=_87454
   Exit: (274) [system] 1753=1753
^  Exit: (273) [user] mfix_vars1(1753, 1753)
   Call: (273) [apply] apply:maplist_([0], _87456, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_121780|_121782], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _121780)
^  Unify: (274) [user] mfix_vars1(0, _121780)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _121780)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_126426))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _121780)
^  Unify: (274) [user] mfix_vars1(0, _121780)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _121780)
^  Unify: (274) [user] mfix_vars1(0, _121780)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _121780)
^  Unify: (274) [user] mfix_vars1(0, _121780)
   Call: (275) [system] 0==[_135706, _135712]
^  Redo: (274) [user] mfix_vars1(0, _121780)
^  Unify: (274) [user] mfix_vars1(0, _121780)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _121780)
^  Unify: (274) [user] mfix_vars1(0, _121780)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _121780)
^  Unify: (274) [user] mfix_vars1(0, _121780)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _121780)
^  Unify: (274) [user] mfix_vars1(0, _121780)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _121780)
   Call: (275) [system] 0=_121780
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _121782, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1753, 0], [1753, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@item\" \"some-func-no-type\")", 1753, 0], [";;             (\"@item\" \"some-func-no-type\")", 1753, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@item\" \"some-func-no-type\")", 1753, 0], [";;             (\"@item\" \"some-func-no-type\")", 1753, 0])
   Call: (270) [system] compound_name_arguments(_15954, '$COMMENT', [";;             (\"@item\" \"some-func-no-type\")", 1753, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT', [";;             (\"@item\" \"some-func-no-type\")", 1753, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0)\=@='$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _10368)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _171954))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _171954))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _171954))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _171954))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _171954)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _171954)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _177540))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _177540))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _177540)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _177540)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _177540)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0)\=@='$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _171954)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _5952))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _5952))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _5952))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _5952))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _5952)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _199860))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _199860))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _199860)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _199860)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _199860)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0)\=@='$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0)\=@='$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _228638, [], _228640)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _228638, [], _228640)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _228638, [], _228640)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _228638, [], _228640)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _228638, [], _228640)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), _237954, _237956)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT', [";;             (\"@item\" \"some-func-no-type\")", 1753, 0])
^  Call: (258) [user] subst_vars([";;             (\"@item\" \"some-func-no-type\")", 1753, 0], _239840, [], _228640)
^  Unify: (258) [user] subst_vars([";;             (\"@item\" \"some-func-no-type\")", 1753, 0], [";;             (\"@item\" \"some-func-no-type\")", 1753, 0], [], [])
   Call: (259) [system] var([";;             (\"@item\" \"some-func-no-type\")", 1753, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@item\" \"some-func-no-type\")", 1753, 0], _239840, [], _228640)
^  Unify: (258) [user] subst_vars([";;             (\"@item\" \"some-func-no-type\")", 1753, 0], [_243576|_243578], [], _228640)
^  Call: (259) [user] subst_vars(";;             (\"@item\" \"some-func-no-type\")", _243576, [], _244516)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" \"some-func-no-type\")", ";;             (\"@item\" \"some-func-no-type\")", [], [])
   Call: (260) [system] var(";;             (\"@item\" \"some-func-no-type\")")
^  Redo: (259) [user] subst_vars(";;             (\"@item\" \"some-func-no-type\")", _243576, [], _244516)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" \"some-func-no-type\")", _243576, [], _244516)
   Call: (260) [system] atom(";;             (\"@item\" \"some-func-no-type\")")
^  Redo: (259) [user] subst_vars(";;             (\"@item\" \"some-func-no-type\")", _243576, [], _244516)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" \"some-func-no-type\")", _243576, [], _244516)
   Call: (260) [system] compound(";;             (\"@item\" \"some-func-no-type\")")
^  Redo: (259) [user] subst_vars(";;             (\"@item\" \"some-func-no-type\")", _243576, [], _244516)
^  Unify: (259) [user] subst_vars(";;             (\"@item\" \"some-func-no-type\")", ";;             (\"@item\" \"some-func-no-type\")", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@item\" \"some-func-no-type\")", ";;             (\"@item\" \"some-func-no-type\")", [], [])
^  Call: (259) [user] subst_vars([1753, 0], _243578, [], _228640)
^  Unify: (259) [user] subst_vars([1753, 0], [1753, 0], [], [])
   Call: (260) [system] var([1753, 0])
^  Redo: (259) [user] subst_vars([1753, 0], _243578, [], _228640)
^  Unify: (259) [user] subst_vars([1753, 0], [_259448|_259450], [], _228640)
^  Call: (260) [user] subst_vars(1753, _259448, [], _260388)
^  Unify: (260) [user] subst_vars(1753, 1753, [], [])
   Call: (261) [system] var(1753)
^  Redo: (260) [user] subst_vars(1753, _259448, [], _260388)
^  Unify: (260) [user] subst_vars(1753, _259448, [], _260388)
   Call: (261) [system] atom(1753)
^  Redo: (260) [user] subst_vars(1753, _259448, [], _260388)
^  Unify: (260) [user] subst_vars(1753, _259448, [], _260388)
   Call: (261) [system] compound(1753)
^  Redo: (260) [user] subst_vars(1753, _259448, [], _260388)
^  Unify: (260) [user] subst_vars(1753, 1753, [], [])
^  Exit: (260) [user] subst_vars(1753, 1753, [], [])
^  Call: (260) [user] subst_vars([0], _259450, [], _228640)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _259450, [], _228640)
^  Unify: (260) [user] subst_vars([0], [_275320|_275322], [], _228640)
^  Call: (261) [user] subst_vars(0, _275320, [], _276260)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _275320, [], _276260)
^  Unify: (261) [user] subst_vars(0, _275320, [], _276260)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _275320, [], _276260)
^  Unify: (261) [user] subst_vars(0, _275320, [], _276260)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _275320, [], _276260)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _275322, [], _228640)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _275322, [], _228640)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1753, 0], [1753, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@item\" \"some-func-no-type\")", 1753, 0], [";;             (\"@item\" \"some-func-no-type\")", 1753, 0], [], [])
   Call: (258) [system] compound_name_arguments(_228638, '$COMMENT', [";;             (\"@item\" \"some-func-no-type\")", 1753, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT', [";;             (\"@item\" \"some-func-no-type\")", 1753, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), [], [])
   Call: (257) [system] _298678=metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@item\" \"some-func-no-type\")", 1753, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1754, 0, 62342, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$stream_position'(62342, 1754, 0, 62376)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _351402))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _351402))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _351402)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _351402)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _351402)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _351402)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _357014))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _357014))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _357014))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _357014))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _357014)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _357014)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _362600))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _362600))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _362600)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _362600)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _362600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _362600)
   Call: (270) [system] var('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _362600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$VAR'(_370060))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _362600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _362600)
   Call: (270) [system] '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _362600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _362600)
   Call: (270) [system] '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _362600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _362600)
   Call: (270) [system] '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0)==[_379340, _379346]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _362600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _362600)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _362600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _362600)
   Call: (270) [system] string('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _362600)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _362600)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _389542, _389544)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT', [";;             (\"@kind\" \"function\")", 1754, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@kind\" \"function\")", 1754, 0], _393284)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@kind\" \"function\")", 1754, 0], _393284)
   Call: (271) [apply] apply:maplist_([";;             (\"@kind\" \"function\")", 1754, 0], _393284, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@kind\" \"function\")", 1754, 0], [_396102|_396104], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _396102)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _396102)
   Call: (273) [system] var(";;             (\"@kind\" \"function\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _396102)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", '$VAR'(_400748))
   Call: (273) [system] atom(";;             (\"@kind\" \"function\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _396102)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _396102)
   Call: (273) [system] ";;             (\"@kind\" \"function\")"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _396102)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _396102)
   Call: (273) [system] ";;             (\"@kind\" \"function\")"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _396102)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _396102)
   Call: (273) [system] ";;             (\"@kind\" \"function\")"==[_410028, _410034]
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _396102)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _396102)
   Call: (273) [system] is_list(";;             (\"@kind\" \"function\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _396102)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _396102)
   Call: (273) [system] string(";;             (\"@kind\" \"function\")")
   Exit: (273) [system] string(";;             (\"@kind\" \"function\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _396102)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _396102)
   Call: (273) [system] compound(";;             (\"@kind\" \"function\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _396102)
^  Unify: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _396102)
^  Call: (273) [user] symbol(";;             (\"@kind\" \"function\")")
^  Unify: (273) [user] symbol(";;             (\"@kind\" \"function\")")
   Call: (274) [system] atom(";;             (\"@kind\" \"function\")")
   Fail: (274) [system] atom(";;             (\"@kind\" \"function\")")
^  Fail: (273) [user] symbol(";;             (\"@kind\" \"function\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", _396102)
   Call: (273) [system] ";;             (\"@kind\" \"function\")"=_396102
   Exit: (273) [system] ";;             (\"@kind\" \"function\")"=";;             (\"@kind\" \"function\")"
^  Exit: (272) [user] mfix_vars1(";;             (\"@kind\" \"function\")", ";;             (\"@kind\" \"function\")")
   Call: (272) [apply] apply:maplist_([1754, 0], _396104, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1754, 0], [_434100|_434102], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1754, _434100)
^  Unify: (273) [user] mfix_vars1(1754, _434100)
   Call: (274) [system] var(1754)
^  Redo: (273) [user] mfix_vars1(1754, _434100)
^  Unify: (273) [user] mfix_vars1(1754, '$VAR'(_438746))
   Call: (274) [system] atom(1754)
^  Redo: (273) [user] mfix_vars1(1754, _434100)
^  Unify: (273) [user] mfix_vars1(1754, _434100)
   Call: (274) [system] 1754==true
^  Redo: (273) [user] mfix_vars1(1754, _434100)
^  Unify: (273) [user] mfix_vars1(1754, _434100)
   Call: (274) [system] 1754==false
^  Redo: (273) [user] mfix_vars1(1754, _434100)
^  Unify: (273) [user] mfix_vars1(1754, _434100)
   Call: (274) [system] 1754==[_448026, _448032]
^  Redo: (273) [user] mfix_vars1(1754, _434100)
^  Unify: (273) [user] mfix_vars1(1754, _434100)
   Call: (274) [system] is_list(1754)
^  Redo: (273) [user] mfix_vars1(1754, _434100)
^  Unify: (273) [user] mfix_vars1(1754, _434100)
   Call: (274) [system] string(1754)
^  Redo: (273) [user] mfix_vars1(1754, _434100)
^  Unify: (273) [user] mfix_vars1(1754, _434100)
   Call: (274) [system] compound(1754)
^  Redo: (273) [user] mfix_vars1(1754, _434100)
^  Unify: (273) [user] mfix_vars1(1754, _434100)
^  Call: (274) [user] symbol(1754)
^  Unify: (274) [user] symbol(1754)
   Call: (275) [system] atom(1754)
   Fail: (275) [system] atom(1754)
^  Fail: (274) [user] symbol(1754)
^  Redo: (273) [user] mfix_vars1(1754, _434100)
   Call: (274) [system] 1754=_434100
   Exit: (274) [system] 1754=1754
^  Exit: (273) [user] mfix_vars1(1754, 1754)
   Call: (273) [apply] apply:maplist_([0], _434102, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_468426|_468428], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _468426)
^  Unify: (274) [user] mfix_vars1(0, _468426)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _468426)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_473072))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _468426)
^  Unify: (274) [user] mfix_vars1(0, _468426)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _468426)
^  Unify: (274) [user] mfix_vars1(0, _468426)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _468426)
^  Unify: (274) [user] mfix_vars1(0, _468426)
   Call: (275) [system] 0==[_482352, _482358]
^  Redo: (274) [user] mfix_vars1(0, _468426)
^  Unify: (274) [user] mfix_vars1(0, _468426)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _468426)
^  Unify: (274) [user] mfix_vars1(0, _468426)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _468426)
^  Unify: (274) [user] mfix_vars1(0, _468426)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _468426)
^  Unify: (274) [user] mfix_vars1(0, _468426)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _468426)
   Call: (275) [system] 0=_468426
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _468428, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1754, 0], [1754, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@kind\" \"function\")", 1754, 0], [";;             (\"@kind\" \"function\")", 1754, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@kind\" \"function\")", 1754, 0], [";;             (\"@kind\" \"function\")", 1754, 0])
   Call: (270) [system] compound_name_arguments(_362600, '$COMMENT', [";;             (\"@kind\" \"function\")", 1754, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT', [";;             (\"@kind\" \"function\")", 1754, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0)\=@='$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _357014)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _518600))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _518600))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _518600))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _518600))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _518600)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _5972)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _6340))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _6340))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _6340)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _6340)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _6340)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0)\=@='$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _5972)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _28660))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _28660))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _28660)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _28660)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _28660)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0)\=@='$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0)\=@='$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _57438, [], _57440)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _57438, [], _57440)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _57438, [], _57440)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _57438, [], _57440)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _57438, [], _57440)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), _66754, _66756)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT', [";;             (\"@kind\" \"function\")", 1754, 0])
^  Call: (258) [user] subst_vars([";;             (\"@kind\" \"function\")", 1754, 0], _68640, [], _57440)
^  Unify: (258) [user] subst_vars([";;             (\"@kind\" \"function\")", 1754, 0], [";;             (\"@kind\" \"function\")", 1754, 0], [], [])
   Call: (259) [system] var([";;             (\"@kind\" \"function\")", 1754, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@kind\" \"function\")", 1754, 0], _68640, [], _57440)
^  Unify: (258) [user] subst_vars([";;             (\"@kind\" \"function\")", 1754, 0], [_72376|_72378], [], _57440)
^  Call: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", _72376, [], _73316)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", ";;             (\"@kind\" \"function\")", [], [])
   Call: (260) [system] var(";;             (\"@kind\" \"function\")")
^  Redo: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", _72376, [], _73316)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", _72376, [], _73316)
   Call: (260) [system] atom(";;             (\"@kind\" \"function\")")
^  Redo: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", _72376, [], _73316)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", _72376, [], _73316)
   Call: (260) [system] compound(";;             (\"@kind\" \"function\")")
^  Redo: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", _72376, [], _73316)
^  Unify: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", ";;             (\"@kind\" \"function\")", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@kind\" \"function\")", ";;             (\"@kind\" \"function\")", [], [])
^  Call: (259) [user] subst_vars([1754, 0], _72378, [], _57440)
^  Unify: (259) [user] subst_vars([1754, 0], [1754, 0], [], [])
   Call: (260) [system] var([1754, 0])
^  Redo: (259) [user] subst_vars([1754, 0], _72378, [], _57440)
^  Unify: (259) [user] subst_vars([1754, 0], [_88248|_88250], [], _57440)
^  Call: (260) [user] subst_vars(1754, _88248, [], _89188)
^  Unify: (260) [user] subst_vars(1754, 1754, [], [])
   Call: (261) [system] var(1754)
^  Redo: (260) [user] subst_vars(1754, _88248, [], _89188)
^  Unify: (260) [user] subst_vars(1754, _88248, [], _89188)
   Call: (261) [system] atom(1754)
^  Redo: (260) [user] subst_vars(1754, _88248, [], _89188)
^  Unify: (260) [user] subst_vars(1754, _88248, [], _89188)
   Call: (261) [system] compound(1754)
^  Redo: (260) [user] subst_vars(1754, _88248, [], _89188)
^  Unify: (260) [user] subst_vars(1754, 1754, [], [])
^  Exit: (260) [user] subst_vars(1754, 1754, [], [])
^  Call: (260) [user] subst_vars([0], _88250, [], _57440)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _88250, [], _57440)
^  Unify: (260) [user] subst_vars([0], [_104120|_104122], [], _57440)
^  Call: (261) [user] subst_vars(0, _104120, [], _105060)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _104120, [], _105060)
^  Unify: (261) [user] subst_vars(0, _104120, [], _105060)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _104120, [], _105060)
^  Unify: (261) [user] subst_vars(0, _104120, [], _105060)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _104120, [], _105060)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _104122, [], _57440)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _104122, [], _57440)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1754, 0], [1754, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@kind\" \"function\")", 1754, 0], [";;             (\"@kind\" \"function\")", 1754, 0], [], [])
   Call: (258) [system] compound_name_arguments(_57438, '$COMMENT', [";;             (\"@kind\" \"function\")", 1754, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT', [";;             (\"@kind\" \"function\")", 1754, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), [], [])
   Call: (257) [system] _127478=metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@kind\" \"function\")", 1754, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1755, 0, 62378, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$stream_position'(62378, 1755, 0, 62412)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _180202))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _180202))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _180202)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _180202)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _180202)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _180202)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _185814))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _185814))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _185814))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _185814))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _185814)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _185814)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _191400))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _191400))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _191400)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _191400)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _191400)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _191400)
   Call: (270) [system] var('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _191400)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$VAR'(_198860))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _191400)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _191400)
   Call: (270) [system] '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _191400)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _191400)
   Call: (270) [system] '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _191400)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _191400)
   Call: (270) [system] '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0)==[_208140, _208146]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _191400)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _191400)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _191400)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _191400)
   Call: (270) [system] string('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _191400)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _191400)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _218342, _218344)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT', [";;             (\"@type\" \"%Undefined%\")", 1755, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@type\" \"%Undefined%\")", 1755, 0], _222084)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@type\" \"%Undefined%\")", 1755, 0], _222084)
   Call: (271) [apply] apply:maplist_([";;             (\"@type\" \"%Undefined%\")", 1755, 0], _222084, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@type\" \"%Undefined%\")", 1755, 0], [_224902|_224904], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _224902)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _224902)
   Call: (273) [system] var(";;             (\"@type\" \"%Undefined%\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _224902)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", '$VAR'(_229548))
   Call: (273) [system] atom(";;             (\"@type\" \"%Undefined%\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _224902)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _224902)
   Call: (273) [system] ";;             (\"@type\" \"%Undefined%\")"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _224902)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _224902)
   Call: (273) [system] ";;             (\"@type\" \"%Undefined%\")"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _224902)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _224902)
   Call: (273) [system] ";;             (\"@type\" \"%Undefined%\")"==[_238828, _238834]
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _224902)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _224902)
   Call: (273) [system] is_list(";;             (\"@type\" \"%Undefined%\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _224902)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _224902)
   Call: (273) [system] string(";;             (\"@type\" \"%Undefined%\")")
   Exit: (273) [system] string(";;             (\"@type\" \"%Undefined%\")")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _224902)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _224902)
   Call: (273) [system] compound(";;             (\"@type\" \"%Undefined%\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _224902)
^  Unify: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _224902)
^  Call: (273) [user] symbol(";;             (\"@type\" \"%Undefined%\")")
^  Unify: (273) [user] symbol(";;             (\"@type\" \"%Undefined%\")")
   Call: (274) [system] atom(";;             (\"@type\" \"%Undefined%\")")
   Fail: (274) [system] atom(";;             (\"@type\" \"%Undefined%\")")
^  Fail: (273) [user] symbol(";;             (\"@type\" \"%Undefined%\")")
^  Redo: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", _224902)
   Call: (273) [system] ";;             (\"@type\" \"%Undefined%\")"=_224902
   Exit: (273) [system] ";;             (\"@type\" \"%Undefined%\")"=";;             (\"@type\" \"%Undefined%\")"
^  Exit: (272) [user] mfix_vars1(";;             (\"@type\" \"%Undefined%\")", ";;             (\"@type\" \"%Undefined%\")")
   Call: (272) [apply] apply:maplist_([1755, 0], _224904, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1755, 0], [_262900|_262902], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1755, _262900)
^  Unify: (273) [user] mfix_vars1(1755, _262900)
   Call: (274) [system] var(1755)
^  Redo: (273) [user] mfix_vars1(1755, _262900)
^  Unify: (273) [user] mfix_vars1(1755, '$VAR'(_267546))
   Call: (274) [system] atom(1755)
^  Redo: (273) [user] mfix_vars1(1755, _262900)
^  Unify: (273) [user] mfix_vars1(1755, _262900)
   Call: (274) [system] 1755==true
^  Redo: (273) [user] mfix_vars1(1755, _262900)
^  Unify: (273) [user] mfix_vars1(1755, _262900)
   Call: (274) [system] 1755==false
^  Redo: (273) [user] mfix_vars1(1755, _262900)
^  Unify: (273) [user] mfix_vars1(1755, _262900)
   Call: (274) [system] 1755==[_276826, _276832]
^  Redo: (273) [user] mfix_vars1(1755, _262900)
^  Unify: (273) [user] mfix_vars1(1755, _262900)
   Call: (274) [system] is_list(1755)
^  Redo: (273) [user] mfix_vars1(1755, _262900)
^  Unify: (273) [user] mfix_vars1(1755, _262900)
   Call: (274) [system] string(1755)
^  Redo: (273) [user] mfix_vars1(1755, _262900)
^  Unify: (273) [user] mfix_vars1(1755, _262900)
   Call: (274) [system] compound(1755)
^  Redo: (273) [user] mfix_vars1(1755, _262900)
^  Unify: (273) [user] mfix_vars1(1755, _262900)
^  Call: (274) [user] symbol(1755)
^  Unify: (274) [user] symbol(1755)
   Call: (275) [system] atom(1755)
   Fail: (275) [system] atom(1755)
^  Fail: (274) [user] symbol(1755)
^  Redo: (273) [user] mfix_vars1(1755, _262900)
   Call: (274) [system] 1755=_262900
   Exit: (274) [system] 1755=1755
^  Exit: (273) [user] mfix_vars1(1755, 1755)
   Call: (273) [apply] apply:maplist_([0], _262902, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_297226|_297228], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _297226)
^  Unify: (274) [user] mfix_vars1(0, _297226)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _297226)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_301872))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _297226)
^  Unify: (274) [user] mfix_vars1(0, _297226)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _297226)
^  Unify: (274) [user] mfix_vars1(0, _297226)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _297226)
^  Unify: (274) [user] mfix_vars1(0, _297226)
   Call: (275) [system] 0==[_311152, _311158]
^  Redo: (274) [user] mfix_vars1(0, _297226)
^  Unify: (274) [user] mfix_vars1(0, _297226)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _297226)
^  Unify: (274) [user] mfix_vars1(0, _297226)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _297226)
^  Unify: (274) [user] mfix_vars1(0, _297226)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _297226)
^  Unify: (274) [user] mfix_vars1(0, _297226)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _297226)
   Call: (275) [system] 0=_297226
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _297228, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1755, 0], [1755, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@type\" \"%Undefined%\")", 1755, 0], [";;             (\"@type\" \"%Undefined%\")", 1755, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@type\" \"%Undefined%\")", 1755, 0], [";;             (\"@type\" \"%Undefined%\")", 1755, 0])
   Call: (270) [system] compound_name_arguments(_191400, '$COMMENT', [";;             (\"@type\" \"%Undefined%\")", 1755, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT', [";;             (\"@type\" \"%Undefined%\")", 1755, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0)\=@='$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _185814)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _347400))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _347400))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _347400))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _347400))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _347400)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _347400)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _352986))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _352986))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _352986)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _352986)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _352986)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0)\=@='$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _347400)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _180202))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _180202))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _180202))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _180202))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _180202)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _180202)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _375306))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _375306))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _375306)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _375306)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _375306)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0)\=@='$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _180202)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0)\=@='$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _404084, [], _404086)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _404084, [], _404086)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _404084, [], _404086)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _404084, [], _404086)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _404084, [], _404086)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), _413400, _413402)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT', [";;             (\"@type\" \"%Undefined%\")", 1755, 0])
^  Call: (258) [user] subst_vars([";;             (\"@type\" \"%Undefined%\")", 1755, 0], _415286, [], _404086)
^  Unify: (258) [user] subst_vars([";;             (\"@type\" \"%Undefined%\")", 1755, 0], [";;             (\"@type\" \"%Undefined%\")", 1755, 0], [], [])
   Call: (259) [system] var([";;             (\"@type\" \"%Undefined%\")", 1755, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@type\" \"%Undefined%\")", 1755, 0], _415286, [], _404086)
^  Unify: (258) [user] subst_vars([";;             (\"@type\" \"%Undefined%\")", 1755, 0], [_419022|_419024], [], _404086)
^  Call: (259) [user] subst_vars(";;             (\"@type\" \"%Undefined%\")", _419022, [], _419962)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" \"%Undefined%\")", ";;             (\"@type\" \"%Undefined%\")", [], [])
   Call: (260) [system] var(";;             (\"@type\" \"%Undefined%\")")
^  Redo: (259) [user] subst_vars(";;             (\"@type\" \"%Undefined%\")", _419022, [], _419962)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" \"%Undefined%\")", _419022, [], _419962)
   Call: (260) [system] atom(";;             (\"@type\" \"%Undefined%\")")
^  Redo: (259) [user] subst_vars(";;             (\"@type\" \"%Undefined%\")", _419022, [], _419962)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" \"%Undefined%\")", _419022, [], _419962)
   Call: (260) [system] compound(";;             (\"@type\" \"%Undefined%\")")
^  Redo: (259) [user] subst_vars(";;             (\"@type\" \"%Undefined%\")", _419022, [], _419962)
^  Unify: (259) [user] subst_vars(";;             (\"@type\" \"%Undefined%\")", ";;             (\"@type\" \"%Undefined%\")", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@type\" \"%Undefined%\")", ";;             (\"@type\" \"%Undefined%\")", [], [])
^  Call: (259) [user] subst_vars([1755, 0], _419024, [], _404086)
^  Unify: (259) [user] subst_vars([1755, 0], [1755, 0], [], [])
   Call: (260) [system] var([1755, 0])
^  Redo: (259) [user] subst_vars([1755, 0], _419024, [], _404086)
^  Unify: (259) [user] subst_vars([1755, 0], [_434894|_434896], [], _404086)
^  Call: (260) [user] subst_vars(1755, _434894, [], _435834)
^  Unify: (260) [user] subst_vars(1755, 1755, [], [])
   Call: (261) [system] var(1755)
^  Redo: (260) [user] subst_vars(1755, _434894, [], _435834)
^  Unify: (260) [user] subst_vars(1755, _434894, [], _435834)
   Call: (261) [system] atom(1755)
^  Redo: (260) [user] subst_vars(1755, _434894, [], _435834)
^  Unify: (260) [user] subst_vars(1755, _434894, [], _435834)
   Call: (261) [system] compound(1755)
^  Redo: (260) [user] subst_vars(1755, _434894, [], _435834)
^  Unify: (260) [user] subst_vars(1755, 1755, [], [])
^  Exit: (260) [user] subst_vars(1755, 1755, [], [])
^  Call: (260) [user] subst_vars([0], _434896, [], _404086)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _434896, [], _404086)
^  Unify: (260) [user] subst_vars([0], [_450766|_450768], [], _404086)
^  Call: (261) [user] subst_vars(0, _450766, [], _451706)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _450766, [], _451706)
^  Unify: (261) [user] subst_vars(0, _450766, [], _451706)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _450766, [], _451706)
^  Unify: (261) [user] subst_vars(0, _450766, [], _451706)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _450766, [], _451706)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _450768, [], _404086)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _450768, [], _404086)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1755, 0], [1755, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@type\" \"%Undefined%\")", 1755, 0], [";;             (\"@type\" \"%Undefined%\")", 1755, 0], [], [])
   Call: (258) [system] compound_name_arguments(_404084, '$COMMENT', [";;             (\"@type\" \"%Undefined%\")", 1755, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT', [";;             (\"@type\" \"%Undefined%\")", 1755, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), [], [])
   Call: (257) [system] _474124=metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@type\" \"%Undefined%\")", 1755, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1756, 0, 62417, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$stream_position'(62417, 1756, 0, 62451)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _8714))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _8714))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _8714)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _8714)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _8714)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _8714)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _14326))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _14326))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _14326))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _14326))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _14326)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _14326)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _19912))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _19912))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _19912)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _19912)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _19912)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _19912)
   Call: (270) [system] var('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _19912)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$VAR'(_27372))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _19912)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _19912)
   Call: (270) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _19912)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _19912)
   Call: (270) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _19912)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _19912)
   Call: (270) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0)==[_36652, _36658]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _19912)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _19912)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _19912)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _19912)
   Call: (270) [system] string('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _19912)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _19912)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _46854, _46856)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0], _50596)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0], _50596)
   Call: (271) [apply] apply:maplist_([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0], _50596, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0], [_53414|_53416], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _53414)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _53414)
   Call: (273) [system] var(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _53414)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", '$VAR'(_58060))
   Call: (273) [system] atom(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _53414)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _53414)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"Test function\")})"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _53414)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _53414)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"Test function\")})"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _53414)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _53414)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"Test function\")})"==[_67340, _67346]
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _53414)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _53414)
   Call: (273) [system] is_list(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _53414)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _53414)
   Call: (273) [system] string(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
   Exit: (273) [system] string(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _53414)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _53414)
   Call: (273) [system] compound(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _53414)
^  Unify: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _53414)
^  Call: (273) [user] symbol(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Unify: (273) [user] symbol(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
   Call: (274) [system] atom(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
   Fail: (274) [system] atom(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Fail: (273) [user] symbol(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _53414)
   Call: (273) [system] ";;             (\"@desc\" {Str::from_str(\"Test function\")})"=_53414
   Exit: (273) [system] ";;             (\"@desc\" {Str::from_str(\"Test function\")})"=";;             (\"@desc\" {Str::from_str(\"Test function\")})"
^  Exit: (272) [user] mfix_vars1(";;             (\"@desc\" {Str::from_str(\"Test function\")})", ";;             (\"@desc\" {Str::from_str(\"Test function\")})")
   Call: (272) [apply] apply:maplist_([1756, 0], _53416, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1756, 0], [_91412|_91414], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1756, _91412)
^  Unify: (273) [user] mfix_vars1(1756, _91412)
   Call: (274) [system] var(1756)
^  Redo: (273) [user] mfix_vars1(1756, _91412)
^  Unify: (273) [user] mfix_vars1(1756, '$VAR'(_96058))
   Call: (274) [system] atom(1756)
^  Redo: (273) [user] mfix_vars1(1756, _91412)
^  Unify: (273) [user] mfix_vars1(1756, _91412)
   Call: (274) [system] 1756==true
^  Redo: (273) [user] mfix_vars1(1756, _91412)
^  Unify: (273) [user] mfix_vars1(1756, _91412)
   Call: (274) [system] 1756==false
^  Redo: (273) [user] mfix_vars1(1756, _91412)
^  Unify: (273) [user] mfix_vars1(1756, _91412)
   Call: (274) [system] 1756==[_105338, _105344]
^  Redo: (273) [user] mfix_vars1(1756, _91412)
^  Unify: (273) [user] mfix_vars1(1756, _91412)
   Call: (274) [system] is_list(1756)
^  Redo: (273) [user] mfix_vars1(1756, _91412)
^  Unify: (273) [user] mfix_vars1(1756, _91412)
   Call: (274) [system] string(1756)
^  Redo: (273) [user] mfix_vars1(1756, _91412)
^  Unify: (273) [user] mfix_vars1(1756, _91412)
   Call: (274) [system] compound(1756)
^  Redo: (273) [user] mfix_vars1(1756, _91412)
^  Unify: (273) [user] mfix_vars1(1756, _91412)
^  Call: (274) [user] symbol(1756)
^  Unify: (274) [user] symbol(1756)
   Call: (275) [system] atom(1756)
   Fail: (275) [system] atom(1756)
^  Fail: (274) [user] symbol(1756)
^  Redo: (273) [user] mfix_vars1(1756, _91412)
   Call: (274) [system] 1756=_91412
   Exit: (274) [system] 1756=1756
^  Exit: (273) [user] mfix_vars1(1756, 1756)
   Call: (273) [apply] apply:maplist_([0], _91414, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_125738|_125740], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _125738)
^  Unify: (274) [user] mfix_vars1(0, _125738)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _125738)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_130384))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _125738)
^  Unify: (274) [user] mfix_vars1(0, _125738)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _125738)
^  Unify: (274) [user] mfix_vars1(0, _125738)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _125738)
^  Unify: (274) [user] mfix_vars1(0, _125738)
   Call: (275) [system] 0==[_139664, _139670]
^  Redo: (274) [user] mfix_vars1(0, _125738)
^  Unify: (274) [user] mfix_vars1(0, _125738)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _125738)
^  Unify: (274) [user] mfix_vars1(0, _125738)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _125738)
^  Unify: (274) [user] mfix_vars1(0, _125738)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _125738)
^  Unify: (274) [user] mfix_vars1(0, _125738)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _125738)
   Call: (275) [system] 0=_125738
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _125740, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1756, 0], [1756, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0], [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0], [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0])
   Call: (270) [system] compound_name_arguments(_19912, '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _14326)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _175912))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _175912))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _175912))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _175912))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _175912)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _175912)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _181498))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _181498))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _181498)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _181498)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _181498)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _175912)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _8714))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _8714))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _8714))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _8714))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _8714)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _8714)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _203818))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _203818))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _203818)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _203818)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _203818)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _8714)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0)\=@='$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _232596, [], _232598)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _232596, [], _232598)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _232596, [], _232598)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _232596, [], _232598)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _232596, [], _232598)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), _241912, _241914)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0])
^  Call: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0], _243798, [], _232598)
^  Unify: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0], [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0], [], [])
   Call: (259) [system] var([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0], _243798, [], _232598)
^  Unify: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0], [_247534|_247536], [], _232598)
^  Call: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _247534, [], _248474)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", ";;             (\"@desc\" {Str::from_str(\"Test function\")})", [], [])
   Call: (260) [system] var(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _247534, [], _248474)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _247534, [], _248474)
   Call: (260) [system] atom(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _247534, [], _248474)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _247534, [], _248474)
   Call: (260) [system] compound(";;             (\"@desc\" {Str::from_str(\"Test function\")})")
^  Redo: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", _247534, [], _248474)
^  Unify: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", ";;             (\"@desc\" {Str::from_str(\"Test function\")})", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@desc\" {Str::from_str(\"Test function\")})", ";;             (\"@desc\" {Str::from_str(\"Test function\")})", [], [])
^  Call: (259) [user] subst_vars([1756, 0], _247536, [], _232598)
^  Unify: (259) [user] subst_vars([1756, 0], [1756, 0], [], [])
   Call: (260) [system] var([1756, 0])
^  Redo: (259) [user] subst_vars([1756, 0], _247536, [], _232598)
^  Unify: (259) [user] subst_vars([1756, 0], [_263406|_263408], [], _232598)
^  Call: (260) [user] subst_vars(1756, _263406, [], _264346)
^  Unify: (260) [user] subst_vars(1756, 1756, [], [])
   Call: (261) [system] var(1756)
^  Redo: (260) [user] subst_vars(1756, _263406, [], _264346)
^  Unify: (260) [user] subst_vars(1756, _263406, [], _264346)
   Call: (261) [system] atom(1756)
^  Redo: (260) [user] subst_vars(1756, _263406, [], _264346)
^  Unify: (260) [user] subst_vars(1756, _263406, [], _264346)
   Call: (261) [system] compound(1756)
^  Redo: (260) [user] subst_vars(1756, _263406, [], _264346)
^  Unify: (260) [user] subst_vars(1756, 1756, [], [])
^  Exit: (260) [user] subst_vars(1756, 1756, [], [])
^  Call: (260) [user] subst_vars([0], _263408, [], _232598)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _263408, [], _232598)
^  Unify: (260) [user] subst_vars([0], [_279278|_279280], [], _232598)
^  Call: (261) [user] subst_vars(0, _279278, [], _280218)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _279278, [], _280218)
^  Unify: (261) [user] subst_vars(0, _279278, [], _280218)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _279278, [], _280218)
^  Unify: (261) [user] subst_vars(0, _279278, [], _280218)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _279278, [], _280218)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _279280, [], _232598)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _279280, [], _232598)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1756, 0], [1756, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0], [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0], [], [])
   Call: (258) [system] compound_name_arguments(_232596, '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT', [";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), [], [])
   Call: (257) [system] _302636=metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@desc\" {Str::from_str(\"Test function\")})", 1756, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1757, 0, 62475, '$COMMENT'(";;             (\"@params\" (", 1757, 0), '$stream_position'(62475, 1757, 0, 62509)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _355358))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _355358))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _355358)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _355358)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@params\" (", 1757, 0), _355358)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@params\" (", 1757, 0), _355358)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _360970))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _360970))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _360970))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _360970))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _360970)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _360970)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _366556))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _366556))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _366556)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _366556)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1757, 0), _366556)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1757, 0), _366556)
   Call: (270) [system] var('$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1757, 0), _366556)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1757, 0), '$VAR'(_374016))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1757, 0), _366556)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1757, 0), _366556)
   Call: (270) [system] '$COMMENT'(";;             (\"@params\" (", 1757, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1757, 0), _366556)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1757, 0), _366556)
   Call: (270) [system] '$COMMENT'(";;             (\"@params\" (", 1757, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1757, 0), _366556)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1757, 0), _366556)
   Call: (270) [system] '$COMMENT'(";;             (\"@params\" (", 1757, 0)==[_383296, _383302]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1757, 0), _366556)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1757, 0), _366556)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1757, 0), _366556)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1757, 0), _366556)
   Call: (270) [system] string('$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1757, 0), _366556)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1757, 0), _366556)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@params\" (", 1757, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@params\" (", 1757, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@params\" (", 1757, 0), _393498, _393500)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT', [";;             (\"@params\" (", 1757, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@params\" (", 1757, 0], _397240)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@params\" (", 1757, 0], _397240)
   Call: (271) [apply] apply:maplist_([";;             (\"@params\" (", 1757, 0], _397240, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@params\" (", 1757, 0], [_400058|_400060], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@params\" (", _400058)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _400058)
   Call: (273) [system] var(";;             (\"@params\" (")
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _400058)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", '$VAR'(_404704))
   Call: (273) [system] atom(";;             (\"@params\" (")
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _400058)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _400058)
   Call: (273) [system] ";;             (\"@params\" ("==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _400058)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _400058)
   Call: (273) [system] ";;             (\"@params\" ("==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _400058)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _400058)
   Call: (273) [system] ";;             (\"@params\" ("==[_413984, _413990]
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _400058)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _400058)
   Call: (273) [system] is_list(";;             (\"@params\" (")
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _400058)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _400058)
   Call: (273) [system] string(";;             (\"@params\" (")
   Exit: (273) [system] string(";;             (\"@params\" (")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _400058)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _400058)
   Call: (273) [system] compound(";;             (\"@params\" (")
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _400058)
^  Unify: (272) [user] mfix_vars1(";;             (\"@params\" (", _400058)
^  Call: (273) [user] symbol(";;             (\"@params\" (")
^  Unify: (273) [user] symbol(";;             (\"@params\" (")
   Call: (274) [system] atom(";;             (\"@params\" (")
   Fail: (274) [system] atom(";;             (\"@params\" (")
^  Fail: (273) [user] symbol(";;             (\"@params\" (")
^  Redo: (272) [user] mfix_vars1(";;             (\"@params\" (", _400058)
   Call: (273) [system] ";;             (\"@params\" ("=_400058
   Exit: (273) [system] ";;             (\"@params\" ("=";;             (\"@params\" ("
^  Exit: (272) [user] mfix_vars1(";;             (\"@params\" (", ";;             (\"@params\" (")
   Call: (272) [apply] apply:maplist_([1757, 0], _400060, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1757, 0], [_438056|_438058], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1757, _438056)
^  Unify: (273) [user] mfix_vars1(1757, _438056)
   Call: (274) [system] var(1757)
^  Redo: (273) [user] mfix_vars1(1757, _438056)
^  Unify: (273) [user] mfix_vars1(1757, '$VAR'(_442702))
   Call: (274) [system] atom(1757)
^  Redo: (273) [user] mfix_vars1(1757, _438056)
^  Unify: (273) [user] mfix_vars1(1757, _438056)
   Call: (274) [system] 1757==true
^  Redo: (273) [user] mfix_vars1(1757, _438056)
^  Unify: (273) [user] mfix_vars1(1757, _438056)
   Call: (274) [system] 1757==false
^  Redo: (273) [user] mfix_vars1(1757, _438056)
^  Unify: (273) [user] mfix_vars1(1757, _438056)
   Call: (274) [system] 1757==[_451982, _451988]
^  Redo: (273) [user] mfix_vars1(1757, _438056)
^  Unify: (273) [user] mfix_vars1(1757, _438056)
   Call: (274) [system] is_list(1757)
^  Redo: (273) [user] mfix_vars1(1757, _438056)
^  Unify: (273) [user] mfix_vars1(1757, _438056)
   Call: (274) [system] string(1757)
^  Redo: (273) [user] mfix_vars1(1757, _438056)
^  Unify: (273) [user] mfix_vars1(1757, _438056)
   Call: (274) [system] compound(1757)
^  Redo: (273) [user] mfix_vars1(1757, _438056)
^  Unify: (273) [user] mfix_vars1(1757, _438056)
^  Call: (274) [user] symbol(1757)
^  Unify: (274) [user] symbol(1757)
   Call: (275) [system] atom(1757)
   Fail: (275) [system] atom(1757)
^  Fail: (274) [user] symbol(1757)
^  Redo: (273) [user] mfix_vars1(1757, _438056)
   Call: (274) [system] 1757=_438056
   Exit: (274) [system] 1757=1757
^  Exit: (273) [user] mfix_vars1(1757, 1757)
   Call: (273) [apply] apply:maplist_([0], _438058, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_472382|_472384], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _472382)
^  Unify: (274) [user] mfix_vars1(0, _472382)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _472382)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_477028))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _472382)
^  Unify: (274) [user] mfix_vars1(0, _472382)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _472382)
^  Unify: (274) [user] mfix_vars1(0, _472382)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _472382)
^  Unify: (274) [user] mfix_vars1(0, _472382)
   Call: (275) [system] 0==[_486308, _486314]
^  Redo: (274) [user] mfix_vars1(0, _472382)
^  Unify: (274) [user] mfix_vars1(0, _472382)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _472382)
^  Unify: (274) [user] mfix_vars1(0, _472382)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _472382)
^  Unify: (274) [user] mfix_vars1(0, _472382)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _472382)
^  Unify: (274) [user] mfix_vars1(0, _472382)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _472382)
   Call: (275) [system] 0=_472382
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _472384, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1757, 0], [1757, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@params\" (", 1757, 0], [";;             (\"@params\" (", 1757, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@params\" (", 1757, 0], [";;             (\"@params\" (", 1757, 0])
   Call: (270) [system] compound_name_arguments(_366556, '$COMMENT', [";;             (\"@params\" (", 1757, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT', [";;             (\"@params\" (", 1757, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@params\" (", 1757, 0)\=@='$COMMENT'(";;             (\"@params\" (", 1757, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _360970)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _522556))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _5970))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _5970))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _5970))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _5970)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _5970)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _10232))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _10232))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _10232)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _10232)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@params\" (", 1757, 0), _10232)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@params\" (", 1757, 0)\=@='$COMMENT'(";;             (\"@params\" (", 1757, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _5970)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _5948))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _5948))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _5948))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _5948))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _5948)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _32552))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _32552))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _32552)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _32552)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@params\" (", 1757, 0), _32552)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@params\" (", 1757, 0)\=@='$COMMENT'(";;             (\"@params\" (", 1757, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@params\" (", 1757, 0)\=@='$COMMENT'(";;             (\"@params\" (", 1757, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1757, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@params\" (", 1757, 0), _61330, [], _61332)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@params\" (", 1757, 0), _61330, [], _61332)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@params\" (", 1757, 0), _61330, [], _61332)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@params\" (", 1757, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@params\" (", 1757, 0), _61330, [], _61332)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@params\" (", 1757, 0), _61330, [], _61332)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@params\" (", 1757, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@params\" (", 1757, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@params\" (", 1757, 0), _70646, _70648)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT', [";;             (\"@params\" (", 1757, 0])
^  Call: (258) [user] subst_vars([";;             (\"@params\" (", 1757, 0], _72532, [], _61332)
^  Unify: (258) [user] subst_vars([";;             (\"@params\" (", 1757, 0], [";;             (\"@params\" (", 1757, 0], [], [])
   Call: (259) [system] var([";;             (\"@params\" (", 1757, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@params\" (", 1757, 0], _72532, [], _61332)
^  Unify: (258) [user] subst_vars([";;             (\"@params\" (", 1757, 0], [_76268|_76270], [], _61332)
^  Call: (259) [user] subst_vars(";;             (\"@params\" (", _76268, [], _77208)
^  Unify: (259) [user] subst_vars(";;             (\"@params\" (", ";;             (\"@params\" (", [], [])
   Call: (260) [system] var(";;             (\"@params\" (")
^  Redo: (259) [user] subst_vars(";;             (\"@params\" (", _76268, [], _77208)
^  Unify: (259) [user] subst_vars(";;             (\"@params\" (", _76268, [], _77208)
   Call: (260) [system] atom(";;             (\"@params\" (")
^  Redo: (259) [user] subst_vars(";;             (\"@params\" (", _76268, [], _77208)
^  Unify: (259) [user] subst_vars(";;             (\"@params\" (", _76268, [], _77208)
   Call: (260) [system] compound(";;             (\"@params\" (")
^  Redo: (259) [user] subst_vars(";;             (\"@params\" (", _76268, [], _77208)
^  Unify: (259) [user] subst_vars(";;             (\"@params\" (", ";;             (\"@params\" (", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@params\" (", ";;             (\"@params\" (", [], [])
^  Call: (259) [user] subst_vars([1757, 0], _76270, [], _61332)
^  Unify: (259) [user] subst_vars([1757, 0], [1757, 0], [], [])
   Call: (260) [system] var([1757, 0])
^  Redo: (259) [user] subst_vars([1757, 0], _76270, [], _61332)
^  Unify: (259) [user] subst_vars([1757, 0], [_92140|_92142], [], _61332)
^  Call: (260) [user] subst_vars(1757, _92140, [], _93080)
^  Unify: (260) [user] subst_vars(1757, 1757, [], [])
   Call: (261) [system] var(1757)
^  Redo: (260) [user] subst_vars(1757, _92140, [], _93080)
^  Unify: (260) [user] subst_vars(1757, _92140, [], _93080)
   Call: (261) [system] atom(1757)
^  Redo: (260) [user] subst_vars(1757, _92140, [], _93080)
^  Unify: (260) [user] subst_vars(1757, _92140, [], _93080)
   Call: (261) [system] compound(1757)
^  Redo: (260) [user] subst_vars(1757, _92140, [], _93080)
^  Unify: (260) [user] subst_vars(1757, 1757, [], [])
^  Exit: (260) [user] subst_vars(1757, 1757, [], [])
^  Call: (260) [user] subst_vars([0], _92142, [], _61332)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _92142, [], _61332)
^  Unify: (260) [user] subst_vars([0], [_108012|_108014], [], _61332)
^  Call: (261) [user] subst_vars(0, _108012, [], _108952)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _108012, [], _108952)
^  Unify: (261) [user] subst_vars(0, _108012, [], _108952)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _108012, [], _108952)
^  Unify: (261) [user] subst_vars(0, _108012, [], _108952)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _108012, [], _108952)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _108014, [], _61332)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _108014, [], _61332)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1757, 0], [1757, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@params\" (", 1757, 0], [";;             (\"@params\" (", 1757, 0], [], [])
   Call: (258) [system] compound_name_arguments(_61330, '$COMMENT', [";;             (\"@params\" (", 1757, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT', [";;             (\"@params\" (", 1757, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@params\" (", 1757, 0), '$COMMENT'(";;             (\"@params\" (", 1757, 0), [], [])
   Call: (257) [system] _131370=metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1757, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1757, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1757, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1757, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1757, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1757, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1757, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1757, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@params\" (", 1757, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1758, 0, 62503, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$stream_position'(62503, 1758, 0, 62537)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _184110))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _184110))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _184110)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _184110)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _184110)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _184110)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _189722))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _189722))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _189722))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _189722))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _189722)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _189722)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _195308))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _195308))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _195308)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _195308)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _195308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _195308)
   Call: (270) [system] var('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _195308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$VAR'(_202768))
   Call: (270) [system] atom('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _195308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _195308)
   Call: (270) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _195308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _195308)
   Call: (270) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _195308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _195308)
   Call: (270) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0)==[_212048, _212054]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _195308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _195308)
   Call: (270) [system] is_list('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _195308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _195308)
   Call: (270) [system] string('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _195308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _195308)
   Call: (270) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
   Exit: (270) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _222250, _222252)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0], _225992)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0], _225992)
   Call: (271) [apply] apply:maplist_([";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0], _225992, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0], [_228810|_228812], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _228810)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _228810)
   Call: (273) [system] var(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _228810)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", '$VAR'(_233456))
   Call: (273) [system] atom(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _228810)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _228810)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))"==true
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _228810)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _228810)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))"==false
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _228810)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _228810)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))"==[_242736, _242742]
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _228810)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _228810)
   Call: (273) [system] is_list(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _228810)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _228810)
   Call: (273) [system] string(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))")
   Exit: (273) [system] string(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _228810)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _228810)
   Call: (273) [system] compound(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _228810)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _228810)
^  Call: (273) [user] symbol(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Unify: (273) [user] symbol(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))")
   Call: (274) [system] atom(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))")
   Fail: (274) [system] atom(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Fail: (273) [user] symbol(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _228810)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))"=_228810
   Exit: (273) [system] ";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))"=";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))"
^  Exit: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", ";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))")
   Call: (272) [apply] apply:maplist_([1758, 0], _228812, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1758, 0], [_266808|_266810], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1758, _266808)
^  Unify: (273) [user] mfix_vars1(1758, _266808)
   Call: (274) [system] var(1758)
^  Redo: (273) [user] mfix_vars1(1758, _266808)
^  Unify: (273) [user] mfix_vars1(1758, '$VAR'(_271454))
   Call: (274) [system] atom(1758)
^  Redo: (273) [user] mfix_vars1(1758, _266808)
^  Unify: (273) [user] mfix_vars1(1758, _266808)
   Call: (274) [system] 1758==true
^  Redo: (273) [user] mfix_vars1(1758, _266808)
^  Unify: (273) [user] mfix_vars1(1758, _266808)
   Call: (274) [system] 1758==false
^  Redo: (273) [user] mfix_vars1(1758, _266808)
^  Unify: (273) [user] mfix_vars1(1758, _266808)
   Call: (274) [system] 1758==[_280734, _280740]
^  Redo: (273) [user] mfix_vars1(1758, _266808)
^  Unify: (273) [user] mfix_vars1(1758, _266808)
   Call: (274) [system] is_list(1758)
^  Redo: (273) [user] mfix_vars1(1758, _266808)
^  Unify: (273) [user] mfix_vars1(1758, _266808)
   Call: (274) [system] string(1758)
^  Redo: (273) [user] mfix_vars1(1758, _266808)
^  Unify: (273) [user] mfix_vars1(1758, _266808)
   Call: (274) [system] compound(1758)
^  Redo: (273) [user] mfix_vars1(1758, _266808)
^  Unify: (273) [user] mfix_vars1(1758, _266808)
^  Call: (274) [user] symbol(1758)
^  Unify: (274) [user] symbol(1758)
   Call: (275) [system] atom(1758)
   Fail: (275) [system] atom(1758)
^  Fail: (274) [user] symbol(1758)
^  Redo: (273) [user] mfix_vars1(1758, _266808)
   Call: (274) [system] 1758=_266808
   Exit: (274) [system] 1758=1758
^  Exit: (273) [user] mfix_vars1(1758, 1758)
   Call: (273) [apply] apply:maplist_([0], _266810, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_301134|_301136], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _301134)
^  Unify: (274) [user] mfix_vars1(0, _301134)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _301134)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_305780))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _301134)
^  Unify: (274) [user] mfix_vars1(0, _301134)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _301134)
^  Unify: (274) [user] mfix_vars1(0, _301134)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _301134)
^  Unify: (274) [user] mfix_vars1(0, _301134)
   Call: (275) [system] 0==[_315060, _315066]
^  Redo: (274) [user] mfix_vars1(0, _301134)
^  Unify: (274) [user] mfix_vars1(0, _301134)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _301134)
^  Unify: (274) [user] mfix_vars1(0, _301134)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _301134)
^  Unify: (274) [user] mfix_vars1(0, _301134)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _301134)
^  Unify: (274) [user] mfix_vars1(0, _301134)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _301134)
   Call: (275) [system] 0=_301134
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _301136, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1758, 0], [1758, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0], [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0], [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0])
   Call: (270) [system] compound_name_arguments(_195308, '$COMMENT', [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0)))
   Call: (267) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _189722)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _351308))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _351308))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _351308))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _351308))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _351308)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _351308)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _356894))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _356894))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _356894)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _356894)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _356894)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0)))
   Call: (267) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _351308)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _184110))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _184110))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _184110))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _184110))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _184110)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _184110)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _379214))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _379214))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _379214)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _379214)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _379214)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0)))
   Call: (267) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _184110)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0)))
   Call: (261) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _407992, [], _407994)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _407992, [], _407994)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _407992, [], _407994)
   Call: (258) [system] atom('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _407992, [], _407994)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _407992, [], _407994)
   Call: (258) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
   Exit: (258) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), _417308, _417310)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0])
^  Call: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0], _419194, [], _407994)
^  Unify: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0], [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0], [], [])
   Call: (259) [system] var([";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0])
^  Redo: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0], _419194, [], _407994)
^  Unify: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0], [_422930|_422932], [], _407994)
^  Call: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _422930, [], _423870)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", ";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", [], [])
   Call: (260) [system] var(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _422930, [], _423870)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _422930, [], _423870)
   Call: (260) [system] atom(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _422930, [], _423870)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _422930, [], _423870)
   Call: (260) [system] compound(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))")
^  Redo: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", _422930, [], _423870)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", ";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", [], [])
^  Exit: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", ";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", [], [])
^  Call: (259) [user] subst_vars([1758, 0], _422932, [], _407994)
^  Unify: (259) [user] subst_vars([1758, 0], [1758, 0], [], [])
   Call: (260) [system] var([1758, 0])
^  Redo: (259) [user] subst_vars([1758, 0], _422932, [], _407994)
^  Unify: (259) [user] subst_vars([1758, 0], [_438802|_438804], [], _407994)
^  Call: (260) [user] subst_vars(1758, _438802, [], _439742)
^  Unify: (260) [user] subst_vars(1758, 1758, [], [])
   Call: (261) [system] var(1758)
^  Redo: (260) [user] subst_vars(1758, _438802, [], _439742)
^  Unify: (260) [user] subst_vars(1758, _438802, [], _439742)
   Call: (261) [system] atom(1758)
^  Redo: (260) [user] subst_vars(1758, _438802, [], _439742)
^  Unify: (260) [user] subst_vars(1758, _438802, [], _439742)
   Call: (261) [system] compound(1758)
^  Redo: (260) [user] subst_vars(1758, _438802, [], _439742)
^  Unify: (260) [user] subst_vars(1758, 1758, [], [])
^  Exit: (260) [user] subst_vars(1758, 1758, [], [])
^  Call: (260) [user] subst_vars([0], _438804, [], _407994)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _438804, [], _407994)
^  Unify: (260) [user] subst_vars([0], [_454674|_454676], [], _407994)
^  Call: (261) [user] subst_vars(0, _454674, [], _455614)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _454674, [], _455614)
^  Unify: (261) [user] subst_vars(0, _454674, [], _455614)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _454674, [], _455614)
^  Unify: (261) [user] subst_vars(0, _454674, [], _455614)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _454674, [], _455614)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _454676, [], _407994)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _454676, [], _407994)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1758, 0], [1758, 0], [], [])
^  Exit: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0], [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0], [], [])
   Call: (258) [system] compound_name_arguments(_407992, '$COMMENT', [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), [], [])
   Call: (257) [system] _478032=metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"First argument\")}))", 1758, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1759, 0, 62601, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$stream_position'(62601, 1759, 0, 62635)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _13488))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _13488))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _13488)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _13488)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _13488)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _13488)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _19100))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _19100))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _19100))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _19100))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _19100)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _19100)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _24686))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _24686))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _24686)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _24686)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _24686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _24686)
   Call: (270) [system] var('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _24686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$VAR'(_32146))
   Call: (270) [system] atom('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _24686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _24686)
   Call: (270) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _24686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _24686)
   Call: (270) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _24686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _24686)
   Call: (270) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0)==[_41426, _41432]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _24686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _24686)
   Call: (270) [system] is_list('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _24686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _24686)
   Call: (270) [system] string('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _24686)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _24686)
   Call: (270) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
   Exit: (270) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _51628, _51630)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0], _55370)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0], _55370)
   Call: (271) [apply] apply:maplist_([";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0], _55370, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0], [_58188|_58190], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _58188)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _58188)
   Call: (273) [system] var(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _58188)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", '$VAR'(_62834))
   Call: (273) [system] atom(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _58188)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _58188)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))"==true
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _58188)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _58188)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))"==false
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _58188)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _58188)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))"==[_72114, _72120]
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _58188)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _58188)
   Call: (273) [system] is_list(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _58188)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _58188)
   Call: (273) [system] string(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
   Exit: (273) [system] string(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _58188)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _58188)
   Call: (273) [system] compound(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _58188)
^  Unify: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _58188)
^  Call: (273) [user] symbol(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Unify: (273) [user] symbol(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
   Call: (274) [system] atom(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
   Fail: (274) [system] atom(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Fail: (273) [user] symbol(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _58188)
   Call: (273) [system] ";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))"=_58188
   Exit: (273) [system] ";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))"=";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))"
^  Exit: (272) [user] mfix_vars1(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", ";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
   Call: (272) [apply] apply:maplist_([1759, 0], _58190, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1759, 0], [_96186|_96188], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1759, _96186)
^  Unify: (273) [user] mfix_vars1(1759, _96186)
   Call: (274) [system] var(1759)
^  Redo: (273) [user] mfix_vars1(1759, _96186)
^  Unify: (273) [user] mfix_vars1(1759, '$VAR'(_100832))
   Call: (274) [system] atom(1759)
^  Redo: (273) [user] mfix_vars1(1759, _96186)
^  Unify: (273) [user] mfix_vars1(1759, _96186)
   Call: (274) [system] 1759==true
^  Redo: (273) [user] mfix_vars1(1759, _96186)
^  Unify: (273) [user] mfix_vars1(1759, _96186)
   Call: (274) [system] 1759==false
^  Redo: (273) [user] mfix_vars1(1759, _96186)
^  Unify: (273) [user] mfix_vars1(1759, _96186)
   Call: (274) [system] 1759==[_110112, _110118]
^  Redo: (273) [user] mfix_vars1(1759, _96186)
^  Unify: (273) [user] mfix_vars1(1759, _96186)
   Call: (274) [system] is_list(1759)
^  Redo: (273) [user] mfix_vars1(1759, _96186)
^  Unify: (273) [user] mfix_vars1(1759, _96186)
   Call: (274) [system] string(1759)
^  Redo: (273) [user] mfix_vars1(1759, _96186)
^  Unify: (273) [user] mfix_vars1(1759, _96186)
   Call: (274) [system] compound(1759)
^  Redo: (273) [user] mfix_vars1(1759, _96186)
^  Unify: (273) [user] mfix_vars1(1759, _96186)
^  Call: (274) [user] symbol(1759)
^  Unify: (274) [user] symbol(1759)
   Call: (275) [system] atom(1759)
   Fail: (275) [system] atom(1759)
^  Fail: (274) [user] symbol(1759)
^  Redo: (273) [user] mfix_vars1(1759, _96186)
   Call: (274) [system] 1759=_96186
   Exit: (274) [system] 1759=1759
^  Exit: (273) [user] mfix_vars1(1759, 1759)
   Call: (273) [apply] apply:maplist_([0], _96188, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_130512|_130514], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _130512)
^  Unify: (274) [user] mfix_vars1(0, _130512)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _130512)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_135158))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _130512)
^  Unify: (274) [user] mfix_vars1(0, _130512)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _130512)
^  Unify: (274) [user] mfix_vars1(0, _130512)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _130512)
^  Unify: (274) [user] mfix_vars1(0, _130512)
   Call: (275) [system] 0==[_144438, _144444]
^  Redo: (274) [user] mfix_vars1(0, _130512)
^  Unify: (274) [user] mfix_vars1(0, _130512)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _130512)
^  Unify: (274) [user] mfix_vars1(0, _130512)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _130512)
^  Unify: (274) [user] mfix_vars1(0, _130512)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _130512)
^  Unify: (274) [user] mfix_vars1(0, _130512)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _130512)
   Call: (275) [system] 0=_130512
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _130514, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1759, 0], [1759, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0], [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0], [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0])
   Call: (270) [system] compound_name_arguments(_24686, '$COMMENT', [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0)))
   Call: (267) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _19100)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _180686))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _180686))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _180686))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _180686))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _180686)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _180686)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _186272))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _186272))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _186272)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _186272)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _186272)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0)))
   Call: (267) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _180686)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _13488))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _13488))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _13488))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _13488))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _13488)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _13488)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _208592))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _208592))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _208592)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _208592)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _208592)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0)))
   Call: (267) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _13488)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0)))
   Call: (261) [system] '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0)\=@='$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _237370, [], _237372)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _237370, [], _237372)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _237370, [], _237372)
   Call: (258) [system] atom('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _237370, [], _237372)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _237370, [], _237372)
   Call: (258) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
   Exit: (258) [system] compound('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), _246686, _246688)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0])
^  Call: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0], _248572, [], _237372)
^  Unify: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0], [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0], [], [])
   Call: (259) [system] var([";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0])
^  Redo: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0], _248572, [], _237372)
^  Unify: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0], [_252308|_252310], [], _237372)
^  Call: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _252308, [], _253248)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", ";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", [], [])
   Call: (260) [system] var(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _252308, [], _253248)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _252308, [], _253248)
   Call: (260) [system] atom(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _252308, [], _253248)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _252308, [], _253248)
   Call: (260) [system] compound(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))")
^  Redo: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", _252308, [], _253248)
^  Unify: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", ";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", [], [])
^  Exit: (259) [user] subst_vars(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", ";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", [], [])
^  Call: (259) [user] subst_vars([1759, 0], _252310, [], _237372)
^  Unify: (259) [user] subst_vars([1759, 0], [1759, 0], [], [])
   Call: (260) [system] var([1759, 0])
^  Redo: (259) [user] subst_vars([1759, 0], _252310, [], _237372)
^  Unify: (259) [user] subst_vars([1759, 0], [_268180|_268182], [], _237372)
^  Call: (260) [user] subst_vars(1759, _268180, [], _269120)
^  Unify: (260) [user] subst_vars(1759, 1759, [], [])
   Call: (261) [system] var(1759)
^  Redo: (260) [user] subst_vars(1759, _268180, [], _269120)
^  Unify: (260) [user] subst_vars(1759, _268180, [], _269120)
   Call: (261) [system] atom(1759)
^  Redo: (260) [user] subst_vars(1759, _268180, [], _269120)
^  Unify: (260) [user] subst_vars(1759, _268180, [], _269120)
   Call: (261) [system] compound(1759)
^  Redo: (260) [user] subst_vars(1759, _268180, [], _269120)
^  Unify: (260) [user] subst_vars(1759, 1759, [], [])
^  Exit: (260) [user] subst_vars(1759, 1759, [], [])
^  Call: (260) [user] subst_vars([0], _268182, [], _237372)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _268182, [], _237372)
^  Unify: (260) [user] subst_vars([0], [_284052|_284054], [], _237372)
^  Call: (261) [user] subst_vars(0, _284052, [], _284992)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _284052, [], _284992)
^  Unify: (261) [user] subst_vars(0, _284052, [], _284992)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _284052, [], _284992)
^  Unify: (261) [user] subst_vars(0, _284052, [], _284992)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _284052, [], _284992)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _284054, [], _237372)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _284054, [], _237372)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1759, 0], [1759, 0], [], [])
^  Exit: (258) [user] subst_vars([";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0], [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0], [], [])
   Call: (258) [system] compound_name_arguments(_237370, '$COMMENT', [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT', [";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), [], [])
   Call: (257) [system] _307410=metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;                 (\"@param\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Second argument\")})) ))", 1759, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1760, 0, 62703, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$stream_position'(62703, 1760, 0, 62737)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _360150))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _360150))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _360150)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _360150)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _360150)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _360150)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _365762))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _365762))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _365762))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _365762))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _365762)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _365762)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _371348))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _371348))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _371348)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _371348)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _371348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _371348)
   Call: (270) [system] var('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _371348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$VAR'(_378808))
   Call: (270) [system] atom('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _371348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _371348)
   Call: (270) [system] '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _371348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _371348)
   Call: (270) [system] '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _371348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _371348)
   Call: (270) [system] '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0)==[_388088, _388094]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _371348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _371348)
   Call: (270) [system] is_list('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _371348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _371348)
   Call: (270) [system] string('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _371348)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _371348)
   Call: (270) [system] compound('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
   Exit: (270) [system] compound('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _398290, _398292)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT', [";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0], _402032)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0], _402032)
   Call: (271) [apply] apply:maplist_([";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0], _402032, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0], [_404850|_404852], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _404850)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _404850)
   Call: (273) [system] var(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _404850)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", '$VAR'(_409496))
   Call: (273) [system] atom(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _404850)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _404850)
   Call: (273) [system] ";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],"==true
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _404850)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _404850)
   Call: (273) [system] ";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],"==false
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _404850)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _404850)
   Call: (273) [system] ";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],"==[_418776, _418782]
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _404850)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _404850)
   Call: (273) [system] is_list(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _404850)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _404850)
   Call: (273) [system] string(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
   Exit: (273) [system] string(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _404850)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _404850)
   Call: (273) [system] compound(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _404850)
^  Unify: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _404850)
^  Call: (273) [user] symbol(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Unify: (273) [user] symbol(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
   Call: (274) [system] atom(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
   Fail: (274) [system] atom(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Fail: (273) [user] symbol(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _404850)
   Call: (273) [system] ";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],"=_404850
   Exit: (273) [system] ";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],"=";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],"
^  Exit: (272) [user] mfix_vars1(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", ";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
   Call: (272) [apply] apply:maplist_([1760, 0], _404852, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1760, 0], [_442848|_442850], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1760, _442848)
^  Unify: (273) [user] mfix_vars1(1760, _442848)
   Call: (274) [system] var(1760)
^  Redo: (273) [user] mfix_vars1(1760, _442848)
^  Unify: (273) [user] mfix_vars1(1760, '$VAR'(_447494))
   Call: (274) [system] atom(1760)
^  Redo: (273) [user] mfix_vars1(1760, _442848)
^  Unify: (273) [user] mfix_vars1(1760, _442848)
   Call: (274) [system] 1760==true
^  Redo: (273) [user] mfix_vars1(1760, _442848)
^  Unify: (273) [user] mfix_vars1(1760, _442848)
   Call: (274) [system] 1760==false
^  Redo: (273) [user] mfix_vars1(1760, _442848)
^  Unify: (273) [user] mfix_vars1(1760, _442848)
   Call: (274) [system] 1760==[_456774, _456780]
^  Redo: (273) [user] mfix_vars1(1760, _442848)
^  Unify: (273) [user] mfix_vars1(1760, _442848)
   Call: (274) [system] is_list(1760)
^  Redo: (273) [user] mfix_vars1(1760, _442848)
^  Unify: (273) [user] mfix_vars1(1760, _442848)
   Call: (274) [system] string(1760)
^  Redo: (273) [user] mfix_vars1(1760, _442848)
^  Unify: (273) [user] mfix_vars1(1760, _442848)
   Call: (274) [system] compound(1760)
^  Redo: (273) [user] mfix_vars1(1760, _442848)
^  Unify: (273) [user] mfix_vars1(1760, _442848)
^  Call: (274) [user] symbol(1760)
^  Unify: (274) [user] symbol(1760)
   Call: (275) [system] atom(1760)
   Fail: (275) [system] atom(1760)
^  Fail: (274) [user] symbol(1760)
^  Redo: (273) [user] mfix_vars1(1760, _442848)
   Call: (274) [system] 1760=_442848
   Exit: (274) [system] 1760=1760
^  Exit: (273) [user] mfix_vars1(1760, 1760)
   Call: (273) [apply] apply:maplist_([0], _442850, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_477174|_477176], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _477174)
^  Unify: (274) [user] mfix_vars1(0, _477174)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _477174)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_481820))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _477174)
^  Unify: (274) [user] mfix_vars1(0, _477174)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _477174)
^  Unify: (274) [user] mfix_vars1(0, _477174)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _477174)
^  Unify: (274) [user] mfix_vars1(0, _477174)
   Call: (275) [system] 0==[_491100, _491106]
^  Redo: (274) [user] mfix_vars1(0, _477174)
^  Unify: (274) [user] mfix_vars1(0, _477174)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _477174)
^  Unify: (274) [user] mfix_vars1(0, _477174)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _477174)
^  Unify: (274) [user] mfix_vars1(0, _477174)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _477174)
^  Unify: (274) [user] mfix_vars1(0, _477174)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _477174)
   Call: (275) [system] 0=_477174
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _477176, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1760, 0], [1760, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0], [";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0], [";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0])
   Call: (270) [system] compound_name_arguments(_371348, '$COMMENT', [";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT', [";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0)\=@='$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _365762)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _9410))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _9410))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _9410))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _9410))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _9410)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _9410)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _14996))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _14996))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _14996)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _14996)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _14996)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0)\=@='$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _9410)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _5966))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _5966))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _5966))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _5966))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _5966)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _5966)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _37316))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _37316))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _37316)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _37316)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _37316)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0)))
   Call: (267) [system] '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0)\=@='$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _5966)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0)))
   Call: (261) [system] '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0)\=@='$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _66094, [], _66096)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _66094, [], _66096)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _66094, [], _66096)
   Call: (258) [system] atom('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _66094, [], _66096)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _66094, [], _66096)
   Call: (258) [system] compound('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
   Exit: (258) [system] compound('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), _75410, _75412)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT', [";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0])
^  Call: (258) [user] subst_vars([";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0], _77296, [], _66096)
^  Unify: (258) [user] subst_vars([";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0], [";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0], [], [])
   Call: (259) [system] var([";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0])
^  Redo: (258) [user] subst_vars([";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0], _77296, [], _66096)
^  Unify: (258) [user] subst_vars([";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0], [_81032|_81034], [], _66096)
^  Call: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _81032, [], _81972)
^  Unify: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", ";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", [], [])
   Call: (260) [system] var(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _81032, [], _81972)
^  Unify: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _81032, [], _81972)
   Call: (260) [system] atom(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _81032, [], _81972)
^  Unify: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _81032, [], _81972)
   Call: (260) [system] compound(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],")
^  Redo: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", _81032, [], _81972)
^  Unify: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", ";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", [], [])
^  Exit: (259) [user] subst_vars(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", ";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", [], [])
^  Call: (259) [user] subst_vars([1760, 0], _81034, [], _66096)
^  Unify: (259) [user] subst_vars([1760, 0], [1760, 0], [], [])
   Call: (260) [system] var([1760, 0])
^  Redo: (259) [user] subst_vars([1760, 0], _81034, [], _66096)
^  Unify: (259) [user] subst_vars([1760, 0], [_96904|_96906], [], _66096)
^  Call: (260) [user] subst_vars(1760, _96904, [], _97844)
^  Unify: (260) [user] subst_vars(1760, 1760, [], [])
   Call: (261) [system] var(1760)
^  Redo: (260) [user] subst_vars(1760, _96904, [], _97844)
^  Unify: (260) [user] subst_vars(1760, _96904, [], _97844)
   Call: (261) [system] atom(1760)
^  Redo: (260) [user] subst_vars(1760, _96904, [], _97844)
^  Unify: (260) [user] subst_vars(1760, _96904, [], _97844)
   Call: (261) [system] compound(1760)
^  Redo: (260) [user] subst_vars(1760, _96904, [], _97844)
^  Unify: (260) [user] subst_vars(1760, 1760, [], [])
^  Exit: (260) [user] subst_vars(1760, 1760, [], [])
^  Call: (260) [user] subst_vars([0], _96906, [], _66096)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _96906, [], _66096)
^  Unify: (260) [user] subst_vars([0], [_112776|_112778], [], _66096)
^  Call: (261) [user] subst_vars(0, _112776, [], _113716)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _112776, [], _113716)
^  Unify: (261) [user] subst_vars(0, _112776, [], _113716)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _112776, [], _113716)
^  Unify: (261) [user] subst_vars(0, _112776, [], _113716)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _112776, [], _113716)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _112778, [], _66096)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _112778, [], _66096)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1760, 0], [1760, 0], [], [])
^  Exit: (258) [user] subst_vars([";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0], [";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0], [], [])
   Call: (258) [system] compound_name_arguments(_66094, '$COMMENT', [";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT', [";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), [], [])
   Call: (257) [system] _136134=metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;             (\"@return\" (\"@type\" \"%Undefined%\") (\"@desc\" {Str::from_str(\"Return value\")}) )],", 1760, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1761, 0, 62799, '$COMMENT'(";;     ]));", 1761, 0), '$stream_position'(62799, 1761, 0, 62833)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1761, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1761, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     ]));", 1761, 0), _188852))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     ]));", 1761, 0), _188852))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     ]));", 1761, 0), _188852)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     ]));", 1761, 0), _188852)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     ]));", 1761, 0), _188852)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     ]));", 1761, 0), _188852)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     ]));", 1761, 0), _194464))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1761, 0), _194464))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1761, 0), _194464))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1761, 0), _194464))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1761, 0), _194464)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1761, 0), _194464)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     ]));", 1761, 0), _200050))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     ]));", 1761, 0), _200050))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     ]));", 1761, 0), _200050)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     ]));", 1761, 0), _200050)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1761, 0), _200050)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1761, 0), _200050)
   Call: (270) [system] var('$COMMENT'(";;     ]));", 1761, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1761, 0), _200050)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1761, 0), '$VAR'(_207510))
   Call: (270) [system] atom('$COMMENT'(";;     ]));", 1761, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1761, 0), _200050)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1761, 0), _200050)
   Call: (270) [system] '$COMMENT'(";;     ]));", 1761, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1761, 0), _200050)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1761, 0), _200050)
   Call: (270) [system] '$COMMENT'(";;     ]));", 1761, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1761, 0), _200050)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1761, 0), _200050)
   Call: (270) [system] '$COMMENT'(";;     ]));", 1761, 0)==[_216790, _216796]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1761, 0), _200050)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1761, 0), _200050)
   Call: (270) [system] is_list('$COMMENT'(";;     ]));", 1761, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1761, 0), _200050)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1761, 0), _200050)
   Call: (270) [system] string('$COMMENT'(";;     ]));", 1761, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1761, 0), _200050)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1761, 0), _200050)
   Call: (270) [system] compound('$COMMENT'(";;     ]));", 1761, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     ]));", 1761, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1761, 0), _226992, _226994)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1761, 0), '$COMMENT', [";;     ]));", 1761, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     ]));", 1761, 0], _230734)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     ]));", 1761, 0], _230734)
   Call: (271) [apply] apply:maplist_([";;     ]));", 1761, 0], _230734, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     ]));", 1761, 0], [_233552|_233554], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     ]));", _233552)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _233552)
   Call: (273) [system] var(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _233552)
^  Unify: (272) [user] mfix_vars1(";;     ]));", '$VAR'(_238198))
   Call: (273) [system] atom(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _233552)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _233552)
   Call: (273) [system] ";;     ]));"==true
^  Redo: (272) [user] mfix_vars1(";;     ]));", _233552)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _233552)
   Call: (273) [system] ";;     ]));"==false
^  Redo: (272) [user] mfix_vars1(";;     ]));", _233552)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _233552)
   Call: (273) [system] ";;     ]));"==[_247478, _247484]
^  Redo: (272) [user] mfix_vars1(";;     ]));", _233552)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _233552)
   Call: (273) [system] is_list(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _233552)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _233552)
   Call: (273) [system] string(";;     ]));")
   Exit: (273) [system] string(";;     ]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     ]));", _233552)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _233552)
   Call: (273) [system] compound(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _233552)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _233552)
^  Call: (273) [user] symbol(";;     ]));")
^  Unify: (273) [user] symbol(";;     ]));")
   Call: (274) [system] atom(";;     ]));")
   Fail: (274) [system] atom(";;     ]));")
^  Fail: (273) [user] symbol(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _233552)
   Call: (273) [system] ";;     ]));"=_233552
   Exit: (273) [system] ";;     ]));"=";;     ]));"
^  Exit: (272) [user] mfix_vars1(";;     ]));", ";;     ]));")
   Call: (272) [apply] apply:maplist_([1761, 0], _233554, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1761, 0], [_271550|_271552], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1761, _271550)
^  Unify: (273) [user] mfix_vars1(1761, _271550)
   Call: (274) [system] var(1761)
^  Redo: (273) [user] mfix_vars1(1761, _271550)
^  Unify: (273) [user] mfix_vars1(1761, '$VAR'(_276196))
   Call: (274) [system] atom(1761)
^  Redo: (273) [user] mfix_vars1(1761, _271550)
^  Unify: (273) [user] mfix_vars1(1761, _271550)
   Call: (274) [system] 1761==true
^  Redo: (273) [user] mfix_vars1(1761, _271550)
^  Unify: (273) [user] mfix_vars1(1761, _271550)
   Call: (274) [system] 1761==false
^  Redo: (273) [user] mfix_vars1(1761, _271550)
^  Unify: (273) [user] mfix_vars1(1761, _271550)
   Call: (274) [system] 1761==[_285476, _285482]
^  Redo: (273) [user] mfix_vars1(1761, _271550)
^  Unify: (273) [user] mfix_vars1(1761, _271550)
   Call: (274) [system] is_list(1761)
^  Redo: (273) [user] mfix_vars1(1761, _271550)
^  Unify: (273) [user] mfix_vars1(1761, _271550)
   Call: (274) [system] string(1761)
^  Redo: (273) [user] mfix_vars1(1761, _271550)
^  Unify: (273) [user] mfix_vars1(1761, _271550)
   Call: (274) [system] compound(1761)
^  Redo: (273) [user] mfix_vars1(1761, _271550)
^  Unify: (273) [user] mfix_vars1(1761, _271550)
^  Call: (274) [user] symbol(1761)
^  Unify: (274) [user] symbol(1761)
   Call: (275) [system] atom(1761)
   Fail: (275) [system] atom(1761)
^  Fail: (274) [user] symbol(1761)
^  Redo: (273) [user] mfix_vars1(1761, _271550)
   Call: (274) [system] 1761=_271550
   Exit: (274) [system] 1761=1761
^  Exit: (273) [user] mfix_vars1(1761, 1761)
   Call: (273) [apply] apply:maplist_([0], _271552, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_305876|_305878], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _305876)
^  Unify: (274) [user] mfix_vars1(0, _305876)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _305876)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_310522))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _305876)
^  Unify: (274) [user] mfix_vars1(0, _305876)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _305876)
^  Unify: (274) [user] mfix_vars1(0, _305876)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _305876)
^  Unify: (274) [user] mfix_vars1(0, _305876)
   Call: (275) [system] 0==[_319802, _319808]
^  Redo: (274) [user] mfix_vars1(0, _305876)
^  Unify: (274) [user] mfix_vars1(0, _305876)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _305876)
^  Unify: (274) [user] mfix_vars1(0, _305876)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _305876)
^  Unify: (274) [user] mfix_vars1(0, _305876)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _305876)
^  Unify: (274) [user] mfix_vars1(0, _305876)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _305876)
   Call: (275) [system] 0=_305876
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _305878, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1761, 0], [1761, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     ]));", 1761, 0], [";;     ]));", 1761, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     ]));", 1761, 0], [";;     ]));", 1761, 0])
   Call: (270) [system] compound_name_arguments(_200050, '$COMMENT', [";;     ]));", 1761, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1761, 0), '$COMMENT', [";;     ]));", 1761, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0)))
   Call: (267) [system] '$COMMENT'(";;     ]));", 1761, 0)\=@='$COMMENT'(";;     ]));", 1761, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1761, 0), _194464)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     ]));", 1761, 0), _356050))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1761, 0), _356050))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1761, 0), _356050))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1761, 0), _356050))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1761, 0), _356050)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1761, 0), _356050)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     ]));", 1761, 0), _361636))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     ]));", 1761, 0), _361636))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     ]));", 1761, 0), _361636)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     ]));", 1761, 0), _361636)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     ]));", 1761, 0), _361636)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0)))
   Call: (267) [system] '$COMMENT'(";;     ]));", 1761, 0)\=@='$COMMENT'(";;     ]));", 1761, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1761, 0), _356050)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     ]));", 1761, 0), _188852))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1761, 0), _188852))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1761, 0), _188852))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1761, 0), _188852))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1761, 0), _188852)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1761, 0), _188852)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     ]));", 1761, 0), _383956))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     ]));", 1761, 0), _383956))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     ]));", 1761, 0), _383956)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     ]));", 1761, 0), _383956)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     ]));", 1761, 0), _383956)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0)))
   Call: (267) [system] '$COMMENT'(";;     ]));", 1761, 0)\=@='$COMMENT'(";;     ]));", 1761, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1761, 0), _188852)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0)))
   Call: (261) [system] '$COMMENT'(";;     ]));", 1761, 0)\=@='$COMMENT'(";;     ]));", 1761, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1761, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1761, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1761, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1761, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1761, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1761, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1761, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1761, 0), _412734, [], _412736)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     ]));", 1761, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1761, 0), _412734, [], _412736)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1761, 0), _412734, [], _412736)
   Call: (258) [system] atom('$COMMENT'(";;     ]));", 1761, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1761, 0), _412734, [], _412736)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1761, 0), _412734, [], _412736)
   Call: (258) [system] compound('$COMMENT'(";;     ]));", 1761, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     ]));", 1761, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1761, 0), _422050, _422052)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1761, 0), '$COMMENT', [";;     ]));", 1761, 0])
^  Call: (258) [user] subst_vars([";;     ]));", 1761, 0], _423936, [], _412736)
^  Unify: (258) [user] subst_vars([";;     ]));", 1761, 0], [";;     ]));", 1761, 0], [], [])
   Call: (259) [system] var([";;     ]));", 1761, 0])
^  Redo: (258) [user] subst_vars([";;     ]));", 1761, 0], _423936, [], _412736)
^  Unify: (258) [user] subst_vars([";;     ]));", 1761, 0], [_427672|_427674], [], _412736)
^  Call: (259) [user] subst_vars(";;     ]));", _427672, [], _428612)
^  Unify: (259) [user] subst_vars(";;     ]));", ";;     ]));", [], [])
   Call: (260) [system] var(";;     ]));")
^  Redo: (259) [user] subst_vars(";;     ]));", _427672, [], _428612)
^  Unify: (259) [user] subst_vars(";;     ]));", _427672, [], _428612)
   Call: (260) [system] atom(";;     ]));")
^  Redo: (259) [user] subst_vars(";;     ]));", _427672, [], _428612)
^  Unify: (259) [user] subst_vars(";;     ]));", _427672, [], _428612)
   Call: (260) [system] compound(";;     ]));")
^  Redo: (259) [user] subst_vars(";;     ]));", _427672, [], _428612)
^  Unify: (259) [user] subst_vars(";;     ]));", ";;     ]));", [], [])
^  Exit: (259) [user] subst_vars(";;     ]));", ";;     ]));", [], [])
^  Call: (259) [user] subst_vars([1761, 0], _427674, [], _412736)
^  Unify: (259) [user] subst_vars([1761, 0], [1761, 0], [], [])
   Call: (260) [system] var([1761, 0])
^  Redo: (259) [user] subst_vars([1761, 0], _427674, [], _412736)
^  Unify: (259) [user] subst_vars([1761, 0], [_443544|_443546], [], _412736)
^  Call: (260) [user] subst_vars(1761, _443544, [], _444484)
^  Unify: (260) [user] subst_vars(1761, 1761, [], [])
   Call: (261) [system] var(1761)
^  Redo: (260) [user] subst_vars(1761, _443544, [], _444484)
^  Unify: (260) [user] subst_vars(1761, _443544, [], _444484)
   Call: (261) [system] atom(1761)
^  Redo: (260) [user] subst_vars(1761, _443544, [], _444484)
^  Unify: (260) [user] subst_vars(1761, _443544, [], _444484)
   Call: (261) [system] compound(1761)
^  Redo: (260) [user] subst_vars(1761, _443544, [], _444484)
^  Unify: (260) [user] subst_vars(1761, 1761, [], [])
^  Exit: (260) [user] subst_vars(1761, 1761, [], [])
^  Call: (260) [user] subst_vars([0], _443546, [], _412736)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _443546, [], _412736)
^  Unify: (260) [user] subst_vars([0], [_459416|_459418], [], _412736)
^  Call: (261) [user] subst_vars(0, _459416, [], _460356)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _459416, [], _460356)
^  Unify: (261) [user] subst_vars(0, _459416, [], _460356)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _459416, [], _460356)
^  Unify: (261) [user] subst_vars(0, _459416, [], _460356)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _459416, [], _460356)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _459418, [], _412736)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _459418, [], _412736)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1761, 0], [1761, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     ]));", 1761, 0], [";;     ]));", 1761, 0], [], [])
   Call: (258) [system] compound_name_arguments(_412734, '$COMMENT', [";;     ]));", 1761, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1761, 0), '$COMMENT', [";;     ]));", 1761, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1761, 0), '$COMMENT'(";;     ]));", 1761, 0), [], [])
   Call: (257) [system] _482774=metta_file_buffer(+, '$COMMENT'(";;     ]));", 1761, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     ]));", 1761, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     ]));", 1761, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     ]));", 1761, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     ]));", 1761, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1761, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1761, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1761, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1761, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1762, 0, 62811, '$COMMENT'(";; }", 1762, 0), '$stream_position'(62811, 1762, 0, 62845)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1762, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1762, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; }", 1762, 0), _18268))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1762, 0), _18268))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; }", 1762, 0), _18268)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1762, 0), _18268)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1762, 0), _18268)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1762, 0), _18268)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; }", 1762, 0), _23880))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1762, 0), _23880))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1762, 0), _23880))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1762, 0), _23880))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1762, 0), _23880)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1762, 0), _23880)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; }", 1762, 0), _29466))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1762, 0), _29466))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; }", 1762, 0), _29466)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1762, 0), _29466)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; }", 1762, 0), _29466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1762, 0), _29466)
   Call: (270) [system] var('$COMMENT'(";; }", 1762, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1762, 0), _29466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1762, 0), '$VAR'(_36926))
   Call: (270) [system] atom('$COMMENT'(";; }", 1762, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1762, 0), _29466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1762, 0), _29466)
   Call: (270) [system] '$COMMENT'(";; }", 1762, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1762, 0), _29466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1762, 0), _29466)
   Call: (270) [system] '$COMMENT'(";; }", 1762, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1762, 0), _29466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1762, 0), _29466)
   Call: (270) [system] '$COMMENT'(";; }", 1762, 0)==[_46206, _46212]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1762, 0), _29466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1762, 0), _29466)
   Call: (270) [system] is_list('$COMMENT'(";; }", 1762, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1762, 0), _29466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1762, 0), _29466)
   Call: (270) [system] string('$COMMENT'(";; }", 1762, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1762, 0), _29466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1762, 0), _29466)
   Call: (270) [system] compound('$COMMENT'(";; }", 1762, 0))
   Exit: (270) [system] compound('$COMMENT'(";; }", 1762, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1762, 0), _56408, _56410)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1762, 0), '$COMMENT', [";; }", 1762, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; }", 1762, 0], _60150)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1762, 0], _60150)
   Call: (271) [apply] apply:maplist_([";; }", 1762, 0], _60150, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; }", 1762, 0], [_62968|_62970], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; }", _62968)
^  Unify: (272) [user] mfix_vars1(";; }", _62968)
   Call: (273) [system] var(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _62968)
^  Unify: (272) [user] mfix_vars1(";; }", '$VAR'(_67614))
   Call: (273) [system] atom(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _62968)
^  Unify: (272) [user] mfix_vars1(";; }", _62968)
   Call: (273) [system] ";; }"==true
^  Redo: (272) [user] mfix_vars1(";; }", _62968)
^  Unify: (272) [user] mfix_vars1(";; }", _62968)
   Call: (273) [system] ";; }"==false
^  Redo: (272) [user] mfix_vars1(";; }", _62968)
^  Unify: (272) [user] mfix_vars1(";; }", _62968)
   Call: (273) [system] ";; }"==[_76894, _76900]
^  Redo: (272) [user] mfix_vars1(";; }", _62968)
^  Unify: (272) [user] mfix_vars1(";; }", _62968)
   Call: (273) [system] is_list(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _62968)
^  Unify: (272) [user] mfix_vars1(";; }", _62968)
   Call: (273) [system] string(";; }")
   Exit: (273) [system] string(";; }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; }", _62968)
^  Unify: (272) [user] mfix_vars1(";; }", _62968)
   Call: (273) [system] compound(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _62968)
^  Unify: (272) [user] mfix_vars1(";; }", _62968)
^  Call: (273) [user] symbol(";; }")
^  Unify: (273) [user] symbol(";; }")
   Call: (274) [system] atom(";; }")
   Fail: (274) [system] atom(";; }")
^  Fail: (273) [user] symbol(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _62968)
   Call: (273) [system] ";; }"=_62968
   Exit: (273) [system] ";; }"=";; }"
^  Exit: (272) [user] mfix_vars1(";; }", ";; }")
   Call: (272) [apply] apply:maplist_([1762, 0], _62970, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1762, 0], [_100966|_100968], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1762, _100966)
^  Unify: (273) [user] mfix_vars1(1762, _100966)
   Call: (274) [system] var(1762)
^  Redo: (273) [user] mfix_vars1(1762, _100966)
^  Unify: (273) [user] mfix_vars1(1762, '$VAR'(_105612))
   Call: (274) [system] atom(1762)
^  Redo: (273) [user] mfix_vars1(1762, _100966)
^  Unify: (273) [user] mfix_vars1(1762, _100966)
   Call: (274) [system] 1762==true
^  Redo: (273) [user] mfix_vars1(1762, _100966)
^  Unify: (273) [user] mfix_vars1(1762, _100966)
   Call: (274) [system] 1762==false
^  Redo: (273) [user] mfix_vars1(1762, _100966)
^  Unify: (273) [user] mfix_vars1(1762, _100966)
   Call: (274) [system] 1762==[_114892, _114898]
^  Redo: (273) [user] mfix_vars1(1762, _100966)
^  Unify: (273) [user] mfix_vars1(1762, _100966)
   Call: (274) [system] is_list(1762)
^  Redo: (273) [user] mfix_vars1(1762, _100966)
^  Unify: (273) [user] mfix_vars1(1762, _100966)
   Call: (274) [system] string(1762)
^  Redo: (273) [user] mfix_vars1(1762, _100966)
^  Unify: (273) [user] mfix_vars1(1762, _100966)
   Call: (274) [system] compound(1762)
^  Redo: (273) [user] mfix_vars1(1762, _100966)
^  Unify: (273) [user] mfix_vars1(1762, _100966)
^  Call: (274) [user] symbol(1762)
^  Unify: (274) [user] symbol(1762)
   Call: (275) [system] atom(1762)
   Fail: (275) [system] atom(1762)
^  Fail: (274) [user] symbol(1762)
^  Redo: (273) [user] mfix_vars1(1762, _100966)
   Call: (274) [system] 1762=_100966
   Exit: (274) [system] 1762=1762
^  Exit: (273) [user] mfix_vars1(1762, 1762)
   Call: (273) [apply] apply:maplist_([0], _100968, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_135292|_135294], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _135292)
^  Unify: (274) [user] mfix_vars1(0, _135292)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _135292)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_139938))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _135292)
^  Unify: (274) [user] mfix_vars1(0, _135292)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _135292)
^  Unify: (274) [user] mfix_vars1(0, _135292)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _135292)
^  Unify: (274) [user] mfix_vars1(0, _135292)
   Call: (275) [system] 0==[_149218, _149224]
^  Redo: (274) [user] mfix_vars1(0, _135292)
^  Unify: (274) [user] mfix_vars1(0, _135292)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _135292)
^  Unify: (274) [user] mfix_vars1(0, _135292)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _135292)
^  Unify: (274) [user] mfix_vars1(0, _135292)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _135292)
^  Unify: (274) [user] mfix_vars1(0, _135292)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _135292)
   Call: (275) [system] 0=_135292
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _135294, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1762, 0], [1762, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; }", 1762, 0], [";; }", 1762, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1762, 0], [";; }", 1762, 0])
   Call: (270) [system] compound_name_arguments(_29466, '$COMMENT', [";; }", 1762, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1762, 0), '$COMMENT', [";; }", 1762, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1762, 0)\=@='$COMMENT'(";; }", 1762, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1762, 0), _23880)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; }", 1762, 0), _185466))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1762, 0), _185466))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1762, 0), _185466))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1762, 0), _185466))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1762, 0), _185466)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1762, 0), _185466)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; }", 1762, 0), _191052))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1762, 0), _191052))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; }", 1762, 0), _191052)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1762, 0), _191052)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; }", 1762, 0), _191052)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1762, 0)\=@='$COMMENT'(";; }", 1762, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1762, 0), _185466)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; }", 1762, 0), _18268))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1762, 0), _18268))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1762, 0), _18268))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1762, 0), _18268))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1762, 0), _18268)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1762, 0), _18268)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; }", 1762, 0), _213372))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1762, 0), _213372))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; }", 1762, 0), _213372)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1762, 0), _213372)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; }", 1762, 0), _213372)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1762, 0)\=@='$COMMENT'(";; }", 1762, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1762, 0), _18268)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0)))
   Call: (261) [system] '$COMMENT'(";; }", 1762, 0)\=@='$COMMENT'(";; }", 1762, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1762, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1762, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1762, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1762, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1762, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; }", 1762, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; }", 1762, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; }", 1762, 0), _242150, [], _242152)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; }", 1762, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1762, 0), _242150, [], _242152)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1762, 0), _242150, [], _242152)
   Call: (258) [system] atom('$COMMENT'(";; }", 1762, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1762, 0), _242150, [], _242152)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1762, 0), _242150, [], _242152)
   Call: (258) [system] compound('$COMMENT'(";; }", 1762, 0))
   Exit: (258) [system] compound('$COMMENT'(";; }", 1762, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1762, 0), _251466, _251468)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1762, 0), '$COMMENT', [";; }", 1762, 0])
^  Call: (258) [user] subst_vars([";; }", 1762, 0], _253352, [], _242152)
^  Unify: (258) [user] subst_vars([";; }", 1762, 0], [";; }", 1762, 0], [], [])
   Call: (259) [system] var([";; }", 1762, 0])
^  Redo: (258) [user] subst_vars([";; }", 1762, 0], _253352, [], _242152)
^  Unify: (258) [user] subst_vars([";; }", 1762, 0], [_257088|_257090], [], _242152)
^  Call: (259) [user] subst_vars(";; }", _257088, [], _258028)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
   Call: (260) [system] var(";; }")
^  Redo: (259) [user] subst_vars(";; }", _257088, [], _258028)
^  Unify: (259) [user] subst_vars(";; }", _257088, [], _258028)
   Call: (260) [system] atom(";; }")
^  Redo: (259) [user] subst_vars(";; }", _257088, [], _258028)
^  Unify: (259) [user] subst_vars(";; }", _257088, [], _258028)
   Call: (260) [system] compound(";; }")
^  Redo: (259) [user] subst_vars(";; }", _257088, [], _258028)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Exit: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Call: (259) [user] subst_vars([1762, 0], _257090, [], _242152)
^  Unify: (259) [user] subst_vars([1762, 0], [1762, 0], [], [])
   Call: (260) [system] var([1762, 0])
^  Redo: (259) [user] subst_vars([1762, 0], _257090, [], _242152)
^  Unify: (259) [user] subst_vars([1762, 0], [_272960|_272962], [], _242152)
^  Call: (260) [user] subst_vars(1762, _272960, [], _273900)
^  Unify: (260) [user] subst_vars(1762, 1762, [], [])
   Call: (261) [system] var(1762)
^  Redo: (260) [user] subst_vars(1762, _272960, [], _273900)
^  Unify: (260) [user] subst_vars(1762, _272960, [], _273900)
   Call: (261) [system] atom(1762)
^  Redo: (260) [user] subst_vars(1762, _272960, [], _273900)
^  Unify: (260) [user] subst_vars(1762, _272960, [], _273900)
   Call: (261) [system] compound(1762)
^  Redo: (260) [user] subst_vars(1762, _272960, [], _273900)
^  Unify: (260) [user] subst_vars(1762, 1762, [], [])
^  Exit: (260) [user] subst_vars(1762, 1762, [], [])
^  Call: (260) [user] subst_vars([0], _272962, [], _242152)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _272962, [], _242152)
^  Unify: (260) [user] subst_vars([0], [_288832|_288834], [], _242152)
^  Call: (261) [user] subst_vars(0, _288832, [], _289772)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _288832, [], _289772)
^  Unify: (261) [user] subst_vars(0, _288832, [], _289772)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _288832, [], _289772)
^  Unify: (261) [user] subst_vars(0, _288832, [], _289772)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _288832, [], _289772)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _288834, [], _242152)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _288834, [], _242152)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1762, 0], [1762, 0], [], [])
^  Exit: (258) [user] subst_vars([";; }", 1762, 0], [";; }", 1762, 0], [], [])
   Call: (258) [system] compound_name_arguments(_242150, '$COMMENT', [";; }", 1762, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1762, 0), '$COMMENT', [";; }", 1762, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; }", 1762, 0), '$COMMENT'(";; }", 1762, 0), [], [])
   Call: (257) [system] _312190=metta_file_buffer(+, '$COMMENT'(";; }", 1762, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; }", 1762, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; }", 1762, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1762, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1762, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1762, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1762, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1762, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1762, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1764, 0, 62817, '$COMMENT'(";; Converted:", 1764, 0), '$stream_position'(62817, 1764, 0, 62851)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1764, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1764, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1764, 0), _364908))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1764, 0), _364908))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1764, 0), _364908)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1764, 0), _364908)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1764, 0), _364908)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1764, 0), _364908)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1764, 0), _370520))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1764, 0), _370520))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1764, 0), _370520))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1764, 0), _370520))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1764, 0), _370520)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1764, 0), _370520)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1764, 0), _376106))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1764, 0), _376106))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1764, 0), _376106)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1764, 0), _376106)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1764, 0), _376106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1764, 0), _376106)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1764, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1764, 0), _376106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1764, 0), '$VAR'(_383566))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1764, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1764, 0), _376106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1764, 0), _376106)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1764, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1764, 0), _376106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1764, 0), _376106)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1764, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1764, 0), _376106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1764, 0), _376106)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1764, 0)==[_392846, _392852]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1764, 0), _376106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1764, 0), _376106)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1764, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1764, 0), _376106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1764, 0), _376106)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1764, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1764, 0), _376106)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1764, 0), _376106)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1764, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1764, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1764, 0), _403048, _403050)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1764, 0), '$COMMENT', [";; Converted:", 1764, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1764, 0], _406790)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1764, 0], _406790)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1764, 0], _406790, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1764, 0], [_409608|_409610], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _409608)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _409608)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _409608)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_414254))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _409608)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _409608)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _409608)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _409608)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _409608)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _409608)
   Call: (273) [system] ";; Converted:"==[_423534, _423540]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _409608)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _409608)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _409608)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _409608)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _409608)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _409608)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _409608)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _409608)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _409608)
   Call: (273) [system] ";; Converted:"=_409608
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1764, 0], _409610, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1764, 0], [_447606|_447608], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1764, _447606)
^  Unify: (273) [user] mfix_vars1(1764, _447606)
   Call: (274) [system] var(1764)
^  Redo: (273) [user] mfix_vars1(1764, _447606)
^  Unify: (273) [user] mfix_vars1(1764, '$VAR'(_452252))
   Call: (274) [system] atom(1764)
^  Redo: (273) [user] mfix_vars1(1764, _447606)
^  Unify: (273) [user] mfix_vars1(1764, _447606)
   Call: (274) [system] 1764==true
^  Redo: (273) [user] mfix_vars1(1764, _447606)
^  Unify: (273) [user] mfix_vars1(1764, _447606)
   Call: (274) [system] 1764==false
^  Redo: (273) [user] mfix_vars1(1764, _447606)
^  Unify: (273) [user] mfix_vars1(1764, _447606)
   Call: (274) [system] 1764==[_461532, _461538]
^  Redo: (273) [user] mfix_vars1(1764, _447606)
^  Unify: (273) [user] mfix_vars1(1764, _447606)
   Call: (274) [system] is_list(1764)
^  Redo: (273) [user] mfix_vars1(1764, _447606)
^  Unify: (273) [user] mfix_vars1(1764, _447606)
   Call: (274) [system] string(1764)
^  Redo: (273) [user] mfix_vars1(1764, _447606)
^  Unify: (273) [user] mfix_vars1(1764, _447606)
   Call: (274) [system] compound(1764)
^  Redo: (273) [user] mfix_vars1(1764, _447606)
^  Unify: (273) [user] mfix_vars1(1764, _447606)
^  Call: (274) [user] symbol(1764)
^  Unify: (274) [user] symbol(1764)
   Call: (275) [system] atom(1764)
   Fail: (275) [system] atom(1764)
^  Fail: (274) [user] symbol(1764)
^  Redo: (273) [user] mfix_vars1(1764, _447606)
   Call: (274) [system] 1764=_447606
   Exit: (274) [system] 1764=1764
^  Exit: (273) [user] mfix_vars1(1764, 1764)
   Call: (273) [apply] apply:maplist_([0], _447608, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_481932|_481934], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _481932)
^  Unify: (274) [user] mfix_vars1(0, _481932)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _481932)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_486578))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _481932)
^  Unify: (274) [user] mfix_vars1(0, _481932)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _481932)
^  Unify: (274) [user] mfix_vars1(0, _481932)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _481932)
^  Unify: (274) [user] mfix_vars1(0, _481932)
   Call: (275) [system] 0==[_495858, _495864]
^  Redo: (274) [user] mfix_vars1(0, _481932)
^  Unify: (274) [user] mfix_vars1(0, _481932)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _481932)
^  Unify: (274) [user] mfix_vars1(0, _481932)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _481932)
^  Unify: (274) [user] mfix_vars1(0, _481932)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _481932)
^  Unify: (274) [user] mfix_vars1(0, _481932)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _481932)
   Call: (275) [system] 0=_481932
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _481934, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1764, 0], [1764, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1764, 0], [";; Converted:", 1764, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1764, 0], [";; Converted:", 1764, 0])
   Call: (270) [system] compound_name_arguments(_376106, '$COMMENT', [";; Converted:", 1764, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1764, 0), '$COMMENT', [";; Converted:", 1764, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1764, 0)\=@='$COMMENT'(";; Converted:", 1764, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1764, 0), _5964)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1764, 0), _14204))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1764, 0), _14204))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1764, 0), _14204))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1764, 0), _14204))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1764, 0), _14204)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1764, 0), _14204)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1764, 0), _19790))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1764, 0), _19790))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1764, 0), _19790)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1764, 0), _19790)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1764, 0), _19790)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1764, 0)\=@='$COMMENT'(";; Converted:", 1764, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1764, 0), _14204)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1764, 0), _5944))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1764, 0), _5944))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1764, 0), _5944))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1764, 0), _5944))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1764, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1764, 0), _5944)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1764, 0), _42110))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1764, 0), _42110))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1764, 0), _42110)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1764, 0), _42110)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1764, 0), _42110)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1764, 0)\=@='$COMMENT'(";; Converted:", 1764, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1764, 0), _5944)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1764, 0)\=@='$COMMENT'(";; Converted:", 1764, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1764, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1764, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1764, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1764, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1764, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1764, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1764, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1764, 0), _70888, [], _70890)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1764, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1764, 0), _70888, [], _70890)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1764, 0), _70888, [], _70890)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1764, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1764, 0), _70888, [], _70890)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1764, 0), _70888, [], _70890)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1764, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1764, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1764, 0), _80204, _80206)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1764, 0), '$COMMENT', [";; Converted:", 1764, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1764, 0], _82090, [], _70890)
^  Unify: (258) [user] subst_vars([";; Converted:", 1764, 0], [";; Converted:", 1764, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1764, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1764, 0], _82090, [], _70890)
^  Unify: (258) [user] subst_vars([";; Converted:", 1764, 0], [_85826|_85828], [], _70890)
^  Call: (259) [user] subst_vars(";; Converted:", _85826, [], _86766)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _85826, [], _86766)
^  Unify: (259) [user] subst_vars(";; Converted:", _85826, [], _86766)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _85826, [], _86766)
^  Unify: (259) [user] subst_vars(";; Converted:", _85826, [], _86766)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _85826, [], _86766)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1764, 0], _85828, [], _70890)
^  Unify: (259) [user] subst_vars([1764, 0], [1764, 0], [], [])
   Call: (260) [system] var([1764, 0])
^  Redo: (259) [user] subst_vars([1764, 0], _85828, [], _70890)
^  Unify: (259) [user] subst_vars([1764, 0], [_101698|_101700], [], _70890)
^  Call: (260) [user] subst_vars(1764, _101698, [], _102638)
^  Unify: (260) [user] subst_vars(1764, 1764, [], [])
   Call: (261) [system] var(1764)
^  Redo: (260) [user] subst_vars(1764, _101698, [], _102638)
^  Unify: (260) [user] subst_vars(1764, _101698, [], _102638)
   Call: (261) [system] atom(1764)
^  Redo: (260) [user] subst_vars(1764, _101698, [], _102638)
^  Unify: (260) [user] subst_vars(1764, _101698, [], _102638)
   Call: (261) [system] compound(1764)
^  Redo: (260) [user] subst_vars(1764, _101698, [], _102638)
^  Unify: (260) [user] subst_vars(1764, 1764, [], [])
^  Exit: (260) [user] subst_vars(1764, 1764, [], [])
^  Call: (260) [user] subst_vars([0], _101700, [], _70890)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _101700, [], _70890)
^  Unify: (260) [user] subst_vars([0], [_117570|_117572], [], _70890)
^  Call: (261) [user] subst_vars(0, _117570, [], _118510)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _117570, [], _118510)
^  Unify: (261) [user] subst_vars(0, _117570, [], _118510)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _117570, [], _118510)
^  Unify: (261) [user] subst_vars(0, _117570, [], _118510)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _117570, [], _118510)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _117572, [], _70890)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _117572, [], _70890)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1764, 0], [1764, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1764, 0], [";; Converted:", 1764, 0], [], [])
   Call: (258) [system] compound_name_arguments(_70888, '$COMMENT', [";; Converted:", 1764, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1764, 0), '$COMMENT', [";; Converted:", 1764, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1764, 0), '$COMMENT'(";; Converted:", 1764, 0), [], [])
   Call: (257) [system] _140928=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1764, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1764, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1764, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1764, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1764, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1764, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1764, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1764, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1764, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1781, 0, 63409, '$COMMENT'(";; Original:", 1781, 0), '$stream_position'(63409, 1781, 0, 63443)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1781, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1781, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Original:", 1781, 0), _193646))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1781, 0), _193646))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Original:", 1781, 0), _193646)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1781, 0), _193646)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1781, 0), _193646)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1781, 0), _193646)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Original:", 1781, 0), _199258))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1781, 0), _199258))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1781, 0), _199258))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1781, 0), _199258))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1781, 0), _199258)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1781, 0), _199258)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Original:", 1781, 0), _204844))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1781, 0), _204844))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Original:", 1781, 0), _204844)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1781, 0), _204844)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1781, 0), _204844)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1781, 0), _204844)
   Call: (270) [system] var('$COMMENT'(";; Original:", 1781, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1781, 0), _204844)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1781, 0), '$VAR'(_212304))
   Call: (270) [system] atom('$COMMENT'(";; Original:", 1781, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1781, 0), _204844)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1781, 0), _204844)
   Call: (270) [system] '$COMMENT'(";; Original:", 1781, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1781, 0), _204844)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1781, 0), _204844)
   Call: (270) [system] '$COMMENT'(";; Original:", 1781, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1781, 0), _204844)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1781, 0), _204844)
   Call: (270) [system] '$COMMENT'(";; Original:", 1781, 0)==[_221584, _221590]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1781, 0), _204844)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1781, 0), _204844)
   Call: (270) [system] is_list('$COMMENT'(";; Original:", 1781, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1781, 0), _204844)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1781, 0), _204844)
   Call: (270) [system] string('$COMMENT'(";; Original:", 1781, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1781, 0), _204844)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1781, 0), _204844)
   Call: (270) [system] compound('$COMMENT'(";; Original:", 1781, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Original:", 1781, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1781, 0), _231786, _231788)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1781, 0), '$COMMENT', [";; Original:", 1781, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Original:", 1781, 0], _235528)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1781, 0], _235528)
   Call: (271) [apply] apply:maplist_([";; Original:", 1781, 0], _235528, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Original:", 1781, 0], [_238346|_238348], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Original:", _238346)
^  Unify: (272) [user] mfix_vars1(";; Original:", _238346)
   Call: (273) [system] var(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _238346)
^  Unify: (272) [user] mfix_vars1(";; Original:", '$VAR'(_242992))
   Call: (273) [system] atom(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _238346)
^  Unify: (272) [user] mfix_vars1(";; Original:", _238346)
   Call: (273) [system] ";; Original:"==true
^  Redo: (272) [user] mfix_vars1(";; Original:", _238346)
^  Unify: (272) [user] mfix_vars1(";; Original:", _238346)
   Call: (273) [system] ";; Original:"==false
^  Redo: (272) [user] mfix_vars1(";; Original:", _238346)
^  Unify: (272) [user] mfix_vars1(";; Original:", _238346)
   Call: (273) [system] ";; Original:"==[_252272, _252278]
^  Redo: (272) [user] mfix_vars1(";; Original:", _238346)
^  Unify: (272) [user] mfix_vars1(";; Original:", _238346)
   Call: (273) [system] is_list(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _238346)
^  Unify: (272) [user] mfix_vars1(";; Original:", _238346)
   Call: (273) [system] string(";; Original:")
   Exit: (273) [system] string(";; Original:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Original:", _238346)
^  Unify: (272) [user] mfix_vars1(";; Original:", _238346)
   Call: (273) [system] compound(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _238346)
^  Unify: (272) [user] mfix_vars1(";; Original:", _238346)
^  Call: (273) [user] symbol(";; Original:")
^  Unify: (273) [user] symbol(";; Original:")
   Call: (274) [system] atom(";; Original:")
   Fail: (274) [system] atom(";; Original:")
^  Fail: (273) [user] symbol(";; Original:")
^  Redo: (272) [user] mfix_vars1(";; Original:", _238346)
   Call: (273) [system] ";; Original:"=_238346
   Exit: (273) [system] ";; Original:"=";; Original:"
^  Exit: (272) [user] mfix_vars1(";; Original:", ";; Original:")
   Call: (272) [apply] apply:maplist_([1781, 0], _238348, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1781, 0], [_276344|_276346], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1781, _276344)
^  Unify: (273) [user] mfix_vars1(1781, _276344)
   Call: (274) [system] var(1781)
^  Redo: (273) [user] mfix_vars1(1781, _276344)
^  Unify: (273) [user] mfix_vars1(1781, '$VAR'(_280990))
   Call: (274) [system] atom(1781)
^  Redo: (273) [user] mfix_vars1(1781, _276344)
^  Unify: (273) [user] mfix_vars1(1781, _276344)
   Call: (274) [system] 1781==true
^  Redo: (273) [user] mfix_vars1(1781, _276344)
^  Unify: (273) [user] mfix_vars1(1781, _276344)
   Call: (274) [system] 1781==false
^  Redo: (273) [user] mfix_vars1(1781, _276344)
^  Unify: (273) [user] mfix_vars1(1781, _276344)
   Call: (274) [system] 1781==[_290270, _290276]
^  Redo: (273) [user] mfix_vars1(1781, _276344)
^  Unify: (273) [user] mfix_vars1(1781, _276344)
   Call: (274) [system] is_list(1781)
^  Redo: (273) [user] mfix_vars1(1781, _276344)
^  Unify: (273) [user] mfix_vars1(1781, _276344)
   Call: (274) [system] string(1781)
^  Redo: (273) [user] mfix_vars1(1781, _276344)
^  Unify: (273) [user] mfix_vars1(1781, _276344)
   Call: (274) [system] compound(1781)
^  Redo: (273) [user] mfix_vars1(1781, _276344)
^  Unify: (273) [user] mfix_vars1(1781, _276344)
^  Call: (274) [user] symbol(1781)
^  Unify: (274) [user] symbol(1781)
   Call: (275) [system] atom(1781)
   Fail: (275) [system] atom(1781)
^  Fail: (274) [user] symbol(1781)
^  Redo: (273) [user] mfix_vars1(1781, _276344)
   Call: (274) [system] 1781=_276344
   Exit: (274) [system] 1781=1781
^  Exit: (273) [user] mfix_vars1(1781, 1781)
   Call: (273) [apply] apply:maplist_([0], _276346, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_310670|_310672], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _310670)
^  Unify: (274) [user] mfix_vars1(0, _310670)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _310670)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_315316))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _310670)
^  Unify: (274) [user] mfix_vars1(0, _310670)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _310670)
^  Unify: (274) [user] mfix_vars1(0, _310670)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _310670)
^  Unify: (274) [user] mfix_vars1(0, _310670)
   Call: (275) [system] 0==[_324596, _324602]
^  Redo: (274) [user] mfix_vars1(0, _310670)
^  Unify: (274) [user] mfix_vars1(0, _310670)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _310670)
^  Unify: (274) [user] mfix_vars1(0, _310670)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _310670)
^  Unify: (274) [user] mfix_vars1(0, _310670)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _310670)
^  Unify: (274) [user] mfix_vars1(0, _310670)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _310670)
   Call: (275) [system] 0=_310670
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _310672, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1781, 0], [1781, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Original:", 1781, 0], [";; Original:", 1781, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Original:", 1781, 0], [";; Original:", 1781, 0])
   Call: (270) [system] compound_name_arguments(_204844, '$COMMENT', [";; Original:", 1781, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Original:", 1781, 0), '$COMMENT', [";; Original:", 1781, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1781, 0)\=@='$COMMENT'(";; Original:", 1781, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1781, 0), _199258)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Original:", 1781, 0), _360844))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1781, 0), _360844))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1781, 0), _360844))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1781, 0), _360844))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1781, 0), _360844)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1781, 0), _360844)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Original:", 1781, 0), _366430))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1781, 0), _366430))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Original:", 1781, 0), _366430)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1781, 0), _366430)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1781, 0), _366430)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1781, 0)\=@='$COMMENT'(";; Original:", 1781, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1781, 0), _360844)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Original:", 1781, 0), _193646))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1781, 0), _193646))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1781, 0), _193646))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1781, 0), _193646))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1781, 0), _193646)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1781, 0), _193646)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Original:", 1781, 0), _388750))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1781, 0), _388750))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Original:", 1781, 0), _388750)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1781, 0), _388750)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1781, 0), _388750)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0)))
   Call: (267) [system] '$COMMENT'(";; Original:", 1781, 0)\=@='$COMMENT'(";; Original:", 1781, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1781, 0), _193646)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0)))
   Call: (261) [system] '$COMMENT'(";; Original:", 1781, 0)\=@='$COMMENT'(";; Original:", 1781, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1781, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1781, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1781, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1781, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1781, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1781, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Original:", 1781, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Original:", 1781, 0), _417528, [], _417530)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Original:", 1781, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1781, 0), _417528, [], _417530)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1781, 0), _417528, [], _417530)
   Call: (258) [system] atom('$COMMENT'(";; Original:", 1781, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Original:", 1781, 0), _417528, [], _417530)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Original:", 1781, 0), _417528, [], _417530)
   Call: (258) [system] compound('$COMMENT'(";; Original:", 1781, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Original:", 1781, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1781, 0), _426844, _426846)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1781, 0), '$COMMENT', [";; Original:", 1781, 0])
^  Call: (258) [user] subst_vars([";; Original:", 1781, 0], _428730, [], _417530)
^  Unify: (258) [user] subst_vars([";; Original:", 1781, 0], [";; Original:", 1781, 0], [], [])
   Call: (259) [system] var([";; Original:", 1781, 0])
^  Redo: (258) [user] subst_vars([";; Original:", 1781, 0], _428730, [], _417530)
^  Unify: (258) [user] subst_vars([";; Original:", 1781, 0], [_432466|_432468], [], _417530)
^  Call: (259) [user] subst_vars(";; Original:", _432466, [], _433406)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
   Call: (260) [system] var(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _432466, [], _433406)
^  Unify: (259) [user] subst_vars(";; Original:", _432466, [], _433406)
   Call: (260) [system] atom(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _432466, [], _433406)
^  Unify: (259) [user] subst_vars(";; Original:", _432466, [], _433406)
   Call: (260) [system] compound(";; Original:")
^  Redo: (259) [user] subst_vars(";; Original:", _432466, [], _433406)
^  Unify: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Exit: (259) [user] subst_vars(";; Original:", ";; Original:", [], [])
^  Call: (259) [user] subst_vars([1781, 0], _432468, [], _417530)
^  Unify: (259) [user] subst_vars([1781, 0], [1781, 0], [], [])
   Call: (260) [system] var([1781, 0])
^  Redo: (259) [user] subst_vars([1781, 0], _432468, [], _417530)
^  Unify: (259) [user] subst_vars([1781, 0], [_448338|_448340], [], _417530)
^  Call: (260) [user] subst_vars(1781, _448338, [], _449278)
^  Unify: (260) [user] subst_vars(1781, 1781, [], [])
   Call: (261) [system] var(1781)
^  Redo: (260) [user] subst_vars(1781, _448338, [], _449278)
^  Unify: (260) [user] subst_vars(1781, _448338, [], _449278)
   Call: (261) [system] atom(1781)
^  Redo: (260) [user] subst_vars(1781, _448338, [], _449278)
^  Unify: (260) [user] subst_vars(1781, _448338, [], _449278)
   Call: (261) [system] compound(1781)
^  Redo: (260) [user] subst_vars(1781, _448338, [], _449278)
^  Unify: (260) [user] subst_vars(1781, 1781, [], [])
^  Exit: (260) [user] subst_vars(1781, 1781, [], [])
^  Call: (260) [user] subst_vars([0], _448340, [], _417530)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _448340, [], _417530)
^  Unify: (260) [user] subst_vars([0], [_464210|_464212], [], _417530)
^  Call: (261) [user] subst_vars(0, _464210, [], _465150)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _464210, [], _465150)
^  Unify: (261) [user] subst_vars(0, _464210, [], _465150)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _464210, [], _465150)
^  Unify: (261) [user] subst_vars(0, _464210, [], _465150)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _464210, [], _465150)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _464212, [], _417530)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _464212, [], _417530)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1781, 0], [1781, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Original:", 1781, 0], [";; Original:", 1781, 0], [], [])
   Call: (258) [system] compound_name_arguments(_417528, '$COMMENT', [";; Original:", 1781, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Original:", 1781, 0), '$COMMENT', [";; Original:", 1781, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Original:", 1781, 0), '$COMMENT'(";; Original:", 1781, 0), [], [])
   Call: (257) [system] _487568=metta_file_buffer(+, '$COMMENT'(";; Original:", 1781, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Original:", 1781, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Original:", 1781, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1781, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Original:", 1781, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1781, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1781, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1781, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Original:", 1781, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1782, 0, 63422, '$COMMENT'(";; #[test]", 1782, 0), '$stream_position'(63422, 1782, 0, 63456)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1782, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1782, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; #[test]", 1782, 0), _22100))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 1782, 0), _22100))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; #[test]", 1782, 0), _22100)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 1782, 0), _22100)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1782, 0), _22100)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1782, 0), _22100)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; #[test]", 1782, 0), _27712))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1782, 0), _27712))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1782, 0), _27712))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1782, 0), _27712))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1782, 0), _27712)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1782, 0), _27712)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; #[test]", 1782, 0), _33298))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 1782, 0), _33298))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; #[test]", 1782, 0), _33298)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 1782, 0), _33298)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1782, 0), _33298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1782, 0), _33298)
   Call: (270) [system] var('$COMMENT'(";; #[test]", 1782, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1782, 0), _33298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1782, 0), '$VAR'(_40758))
   Call: (270) [system] atom('$COMMENT'(";; #[test]", 1782, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1782, 0), _33298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1782, 0), _33298)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1782, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1782, 0), _33298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1782, 0), _33298)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1782, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1782, 0), _33298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1782, 0), _33298)
   Call: (270) [system] '$COMMENT'(";; #[test]", 1782, 0)==[_50038, _50044]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1782, 0), _33298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1782, 0), _33298)
   Call: (270) [system] is_list('$COMMENT'(";; #[test]", 1782, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1782, 0), _33298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1782, 0), _33298)
   Call: (270) [system] string('$COMMENT'(";; #[test]", 1782, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1782, 0), _33298)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1782, 0), _33298)
   Call: (270) [system] compound('$COMMENT'(";; #[test]", 1782, 0))
   Exit: (270) [system] compound('$COMMENT'(";; #[test]", 1782, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1782, 0), _60240, _60242)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1782, 0), '$COMMENT', [";; #[test]", 1782, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; #[test]", 1782, 0], _63982)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 1782, 0], _63982)
   Call: (271) [apply] apply:maplist_([";; #[test]", 1782, 0], _63982, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; #[test]", 1782, 0], [_66800|_66802], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; #[test]", _66800)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _66800)
   Call: (273) [system] var(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _66800)
^  Unify: (272) [user] mfix_vars1(";; #[test]", '$VAR'(_71446))
   Call: (273) [system] atom(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _66800)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _66800)
   Call: (273) [system] ";; #[test]"==true
^  Redo: (272) [user] mfix_vars1(";; #[test]", _66800)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _66800)
   Call: (273) [system] ";; #[test]"==false
^  Redo: (272) [user] mfix_vars1(";; #[test]", _66800)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _66800)
   Call: (273) [system] ";; #[test]"==[_80726, _80732]
^  Redo: (272) [user] mfix_vars1(";; #[test]", _66800)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _66800)
   Call: (273) [system] is_list(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _66800)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _66800)
   Call: (273) [system] string(";; #[test]")
   Exit: (273) [system] string(";; #[test]")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; #[test]", _66800)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _66800)
   Call: (273) [system] compound(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _66800)
^  Unify: (272) [user] mfix_vars1(";; #[test]", _66800)
^  Call: (273) [user] symbol(";; #[test]")
^  Unify: (273) [user] symbol(";; #[test]")
   Call: (274) [system] atom(";; #[test]")
   Fail: (274) [system] atom(";; #[test]")
^  Fail: (273) [user] symbol(";; #[test]")
^  Redo: (272) [user] mfix_vars1(";; #[test]", _66800)
   Call: (273) [system] ";; #[test]"=_66800
   Exit: (273) [system] ";; #[test]"=";; #[test]"
^  Exit: (272) [user] mfix_vars1(";; #[test]", ";; #[test]")
   Call: (272) [apply] apply:maplist_([1782, 0], _66802, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1782, 0], [_104798|_104800], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1782, _104798)
^  Unify: (273) [user] mfix_vars1(1782, _104798)
   Call: (274) [system] var(1782)
^  Redo: (273) [user] mfix_vars1(1782, _104798)
^  Unify: (273) [user] mfix_vars1(1782, '$VAR'(_109444))
   Call: (274) [system] atom(1782)
^  Redo: (273) [user] mfix_vars1(1782, _104798)
^  Unify: (273) [user] mfix_vars1(1782, _104798)
   Call: (274) [system] 1782==true
^  Redo: (273) [user] mfix_vars1(1782, _104798)
^  Unify: (273) [user] mfix_vars1(1782, _104798)
   Call: (274) [system] 1782==false
^  Redo: (273) [user] mfix_vars1(1782, _104798)
^  Unify: (273) [user] mfix_vars1(1782, _104798)
   Call: (274) [system] 1782==[_118724, _118730]
^  Redo: (273) [user] mfix_vars1(1782, _104798)
^  Unify: (273) [user] mfix_vars1(1782, _104798)
   Call: (274) [system] is_list(1782)
^  Redo: (273) [user] mfix_vars1(1782, _104798)
^  Unify: (273) [user] mfix_vars1(1782, _104798)
   Call: (274) [system] string(1782)
^  Redo: (273) [user] mfix_vars1(1782, _104798)
^  Unify: (273) [user] mfix_vars1(1782, _104798)
   Call: (274) [system] compound(1782)
^  Redo: (273) [user] mfix_vars1(1782, _104798)
^  Unify: (273) [user] mfix_vars1(1782, _104798)
^  Call: (274) [user] symbol(1782)
^  Unify: (274) [user] symbol(1782)
   Call: (275) [system] atom(1782)
   Fail: (275) [system] atom(1782)
^  Fail: (274) [user] symbol(1782)
^  Redo: (273) [user] mfix_vars1(1782, _104798)
   Call: (274) [system] 1782=_104798
   Exit: (274) [system] 1782=1782
^  Exit: (273) [user] mfix_vars1(1782, 1782)
   Call: (273) [apply] apply:maplist_([0], _104800, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_139124|_139126], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _139124)
^  Unify: (274) [user] mfix_vars1(0, _139124)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _139124)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_143770))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _139124)
^  Unify: (274) [user] mfix_vars1(0, _139124)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _139124)
^  Unify: (274) [user] mfix_vars1(0, _139124)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _139124)
^  Unify: (274) [user] mfix_vars1(0, _139124)
   Call: (275) [system] 0==[_153050, _153056]
^  Redo: (274) [user] mfix_vars1(0, _139124)
^  Unify: (274) [user] mfix_vars1(0, _139124)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _139124)
^  Unify: (274) [user] mfix_vars1(0, _139124)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _139124)
^  Unify: (274) [user] mfix_vars1(0, _139124)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _139124)
^  Unify: (274) [user] mfix_vars1(0, _139124)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _139124)
   Call: (275) [system] 0=_139124
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _139126, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1782, 0], [1782, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; #[test]", 1782, 0], [";; #[test]", 1782, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; #[test]", 1782, 0], [";; #[test]", 1782, 0])
   Call: (270) [system] compound_name_arguments(_33298, '$COMMENT', [";; #[test]", 1782, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1782, 0), '$COMMENT', [";; #[test]", 1782, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1782, 0)\=@='$COMMENT'(";; #[test]", 1782, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1782, 0), _27712)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; #[test]", 1782, 0), _189298))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1782, 0), _189298))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1782, 0), _189298))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1782, 0), _189298))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1782, 0), _189298)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1782, 0), _189298)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; #[test]", 1782, 0), _194884))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 1782, 0), _194884))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; #[test]", 1782, 0), _194884)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 1782, 0), _194884)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1782, 0), _194884)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1782, 0)\=@='$COMMENT'(";; #[test]", 1782, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1782, 0), _189298)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; #[test]", 1782, 0), _22100))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1782, 0), _22100))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1782, 0), _22100))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1782, 0), _22100))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1782, 0), _22100)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1782, 0), _22100)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; #[test]", 1782, 0), _217204))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 1782, 0), _217204))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; #[test]", 1782, 0), _217204)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 1782, 0), _217204)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1782, 0), _217204)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0)))
   Call: (267) [system] '$COMMENT'(";; #[test]", 1782, 0)\=@='$COMMENT'(";; #[test]", 1782, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1782, 0), _22100)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0)))
   Call: (261) [system] '$COMMENT'(";; #[test]", 1782, 0)\=@='$COMMENT'(";; #[test]", 1782, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1782, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1782, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1782, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1782, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1782, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1782, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; #[test]", 1782, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1782, 0), _245982, [], _245984)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; #[test]", 1782, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1782, 0), _245982, [], _245984)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1782, 0), _245982, [], _245984)
   Call: (258) [system] atom('$COMMENT'(";; #[test]", 1782, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1782, 0), _245982, [], _245984)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1782, 0), _245982, [], _245984)
   Call: (258) [system] compound('$COMMENT'(";; #[test]", 1782, 0))
   Exit: (258) [system] compound('$COMMENT'(";; #[test]", 1782, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1782, 0), _255298, _255300)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1782, 0), '$COMMENT', [";; #[test]", 1782, 0])
^  Call: (258) [user] subst_vars([";; #[test]", 1782, 0], _257184, [], _245984)
^  Unify: (258) [user] subst_vars([";; #[test]", 1782, 0], [";; #[test]", 1782, 0], [], [])
   Call: (259) [system] var([";; #[test]", 1782, 0])
^  Redo: (258) [user] subst_vars([";; #[test]", 1782, 0], _257184, [], _245984)
^  Unify: (258) [user] subst_vars([";; #[test]", 1782, 0], [_260920|_260922], [], _245984)
^  Call: (259) [user] subst_vars(";; #[test]", _260920, [], _261860)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
   Call: (260) [system] var(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _260920, [], _261860)
^  Unify: (259) [user] subst_vars(";; #[test]", _260920, [], _261860)
   Call: (260) [system] atom(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _260920, [], _261860)
^  Unify: (259) [user] subst_vars(";; #[test]", _260920, [], _261860)
   Call: (260) [system] compound(";; #[test]")
^  Redo: (259) [user] subst_vars(";; #[test]", _260920, [], _261860)
^  Unify: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Exit: (259) [user] subst_vars(";; #[test]", ";; #[test]", [], [])
^  Call: (259) [user] subst_vars([1782, 0], _260922, [], _245984)
^  Unify: (259) [user] subst_vars([1782, 0], [1782, 0], [], [])
   Call: (260) [system] var([1782, 0])
^  Redo: (259) [user] subst_vars([1782, 0], _260922, [], _245984)
^  Unify: (259) [user] subst_vars([1782, 0], [_276792|_276794], [], _245984)
^  Call: (260) [user] subst_vars(1782, _276792, [], _277732)
^  Unify: (260) [user] subst_vars(1782, 1782, [], [])
   Call: (261) [system] var(1782)
^  Redo: (260) [user] subst_vars(1782, _276792, [], _277732)
^  Unify: (260) [user] subst_vars(1782, _276792, [], _277732)
   Call: (261) [system] atom(1782)
^  Redo: (260) [user] subst_vars(1782, _276792, [], _277732)
^  Unify: (260) [user] subst_vars(1782, _276792, [], _277732)
   Call: (261) [system] compound(1782)
^  Redo: (260) [user] subst_vars(1782, _276792, [], _277732)
^  Unify: (260) [user] subst_vars(1782, 1782, [], [])
^  Exit: (260) [user] subst_vars(1782, 1782, [], [])
^  Call: (260) [user] subst_vars([0], _276794, [], _245984)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _276794, [], _245984)
^  Unify: (260) [user] subst_vars([0], [_292664|_292666], [], _245984)
^  Call: (261) [user] subst_vars(0, _292664, [], _293604)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _292664, [], _293604)
^  Unify: (261) [user] subst_vars(0, _292664, [], _293604)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _292664, [], _293604)
^  Unify: (261) [user] subst_vars(0, _292664, [], _293604)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _292664, [], _293604)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _292666, [], _245984)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _292666, [], _245984)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1782, 0], [1782, 0], [], [])
^  Exit: (258) [user] subst_vars([";; #[test]", 1782, 0], [";; #[test]", 1782, 0], [], [])
   Call: (258) [system] compound_name_arguments(_245982, '$COMMENT', [";; #[test]", 1782, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; #[test]", 1782, 0), '$COMMENT', [";; #[test]", 1782, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; #[test]", 1782, 0), '$COMMENT'(";; #[test]", 1782, 0), [], [])
   Call: (257) [system] _316022=metta_file_buffer(+, '$COMMENT'(";; #[test]", 1782, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; #[test]", 1782, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; #[test]", 1782, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 1782, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; #[test]", 1782, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1782, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1782, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1782, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; #[test]", 1782, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1783, 0, 63433, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$stream_position'(63433, 1783, 0, 63467)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _368748))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _368748))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _368748)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _368748)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _368748)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _368748)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _374360))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _374360))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _374360))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _374360))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _374360)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _374360)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _379946))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _379946))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _379946)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _379946)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _379946)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _379946)
   Call: (270) [system] var('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _379946)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$VAR'(_387406))
   Call: (270) [system] atom('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _379946)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _379946)
   Call: (270) [system] '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _379946)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _379946)
   Call: (270) [system] '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _379946)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _379946)
   Call: (270) [system] '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0)==[_396686, _396692]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _379946)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _379946)
   Call: (270) [system] is_list('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _379946)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _379946)
   Call: (270) [system] string('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _379946)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _379946)
   Call: (270) [system] compound('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
   Exit: (270) [system] compound('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _406888, _406890)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT', [";; fn test_error_is_used_as_an_argument() {", 1783, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; fn test_error_is_used_as_an_argument() {", 1783, 0], _410630)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn test_error_is_used_as_an_argument() {", 1783, 0], _410630)
   Call: (271) [apply] apply:maplist_([";; fn test_error_is_used_as_an_argument() {", 1783, 0], _410630, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; fn test_error_is_used_as_an_argument() {", 1783, 0], [_413448|_413450], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; fn test_error_is_used_as_an_argument() {", _413448)
^  Unify: (272) [user] mfix_vars1(";; fn test_error_is_used_as_an_argument() {", _413448)
   Call: (273) [system] var(";; fn test_error_is_used_as_an_argument() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_error_is_used_as_an_argument() {", _413448)
^  Unify: (272) [user] mfix_vars1(";; fn test_error_is_used_as_an_argument() {", '$VAR'(_418094))
   Call: (273) [system] atom(";; fn test_error_is_used_as_an_argument() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_error_is_used_as_an_argument() {", _413448)
^  Unify: (272) [user] mfix_vars1(";; fn test_error_is_used_as_an_argument() {", _413448)
   Call: (273) [system] ";; fn test_error_is_used_as_an_argument() {"==true
^  Redo: (272) [user] mfix_vars1(";; fn test_error_is_used_as_an_argument() {", _413448)
^  Unify: (272) [user] mfix_vars1(";; fn test_error_is_used_as_an_argument() {", _413448)
   Call: (273) [system] ";; fn test_error_is_used_as_an_argument() {"==false
^  Redo: (272) [user] mfix_vars1(";; fn test_error_is_used_as_an_argument() {", _413448)
^  Unify: (272) [user] mfix_vars1(";; fn test_error_is_used_as_an_argument() {", _413448)
   Call: (273) [system] ";; fn test_error_is_used_as_an_argument() {"==[_427374, _427380]
^  Redo: (272) [user] mfix_vars1(";; fn test_error_is_used_as_an_argument() {", _413448)
^  Unify: (272) [user] mfix_vars1(";; fn test_error_is_used_as_an_argument() {", _413448)
   Call: (273) [system] is_list(";; fn test_error_is_used_as_an_argument() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_error_is_used_as_an_argument() {", _413448)
^  Unify: (272) [user] mfix_vars1(";; fn test_error_is_used_as_an_argument() {", _413448)
   Call: (273) [system] string(";; fn test_error_is_used_as_an_argument() {")
   Exit: (273) [system] string(";; fn test_error_is_used_as_an_argument() {")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; fn test_error_is_used_as_an_argument() {", _413448)
^  Unify: (272) [user] mfix_vars1(";; fn test_error_is_used_as_an_argument() {", _413448)
   Call: (273) [system] compound(";; fn test_error_is_used_as_an_argument() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_error_is_used_as_an_argument() {", _413448)
^  Unify: (272) [user] mfix_vars1(";; fn test_error_is_used_as_an_argument() {", _413448)
^  Call: (273) [user] symbol(";; fn test_error_is_used_as_an_argument() {")
^  Unify: (273) [user] symbol(";; fn test_error_is_used_as_an_argument() {")
   Call: (274) [system] atom(";; fn test_error_is_used_as_an_argument() {")
   Fail: (274) [system] atom(";; fn test_error_is_used_as_an_argument() {")
^  Fail: (273) [user] symbol(";; fn test_error_is_used_as_an_argument() {")
^  Redo: (272) [user] mfix_vars1(";; fn test_error_is_used_as_an_argument() {", _413448)
   Call: (273) [system] ";; fn test_error_is_used_as_an_argument() {"=_413448
   Exit: (273) [system] ";; fn test_error_is_used_as_an_argument() {"=";; fn test_error_is_used_as_an_argument() {"
^  Exit: (272) [user] mfix_vars1(";; fn test_error_is_used_as_an_argument() {", ";; fn test_error_is_used_as_an_argument() {")
   Call: (272) [apply] apply:maplist_([1783, 0], _413450, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1783, 0], [_451446|_451448], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1783, _451446)
^  Unify: (273) [user] mfix_vars1(1783, _451446)
   Call: (274) [system] var(1783)
^  Redo: (273) [user] mfix_vars1(1783, _451446)
^  Unify: (273) [user] mfix_vars1(1783, '$VAR'(_456092))
   Call: (274) [system] atom(1783)
^  Redo: (273) [user] mfix_vars1(1783, _451446)
^  Unify: (273) [user] mfix_vars1(1783, _451446)
   Call: (274) [system] 1783==true
^  Redo: (273) [user] mfix_vars1(1783, _451446)
^  Unify: (273) [user] mfix_vars1(1783, _451446)
   Call: (274) [system] 1783==false
^  Redo: (273) [user] mfix_vars1(1783, _451446)
^  Unify: (273) [user] mfix_vars1(1783, _451446)
   Call: (274) [system] 1783==[_465372, _465378]
^  Redo: (273) [user] mfix_vars1(1783, _451446)
^  Unify: (273) [user] mfix_vars1(1783, _451446)
   Call: (274) [system] is_list(1783)
^  Redo: (273) [user] mfix_vars1(1783, _451446)
^  Unify: (273) [user] mfix_vars1(1783, _451446)
   Call: (274) [system] string(1783)
^  Redo: (273) [user] mfix_vars1(1783, _451446)
^  Unify: (273) [user] mfix_vars1(1783, _451446)
   Call: (274) [system] compound(1783)
^  Redo: (273) [user] mfix_vars1(1783, _451446)
^  Unify: (273) [user] mfix_vars1(1783, _451446)
^  Call: (274) [user] symbol(1783)
^  Unify: (274) [user] symbol(1783)
   Call: (275) [system] atom(1783)
   Fail: (275) [system] atom(1783)
^  Fail: (274) [user] symbol(1783)
^  Redo: (273) [user] mfix_vars1(1783, _451446)
   Call: (274) [system] 1783=_451446
   Exit: (274) [system] 1783=1783
^  Exit: (273) [user] mfix_vars1(1783, 1783)
   Call: (273) [apply] apply:maplist_([0], _451448, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_485772|_485774], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _485772)
^  Unify: (274) [user] mfix_vars1(0, _485772)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _485772)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_490418))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _485772)
^  Unify: (274) [user] mfix_vars1(0, _485772)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _485772)
^  Unify: (274) [user] mfix_vars1(0, _485772)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _485772)
^  Unify: (274) [user] mfix_vars1(0, _485772)
   Call: (275) [system] 0==[_499698, _499704]
^  Redo: (274) [user] mfix_vars1(0, _485772)
^  Unify: (274) [user] mfix_vars1(0, _485772)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _485772)
^  Unify: (274) [user] mfix_vars1(0, _485772)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _485772)
^  Unify: (274) [user] mfix_vars1(0, _485772)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _485772)
^  Unify: (274) [user] mfix_vars1(0, _485772)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _485772)
   Call: (275) [system] 0=_485772
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _485774, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1783, 0], [1783, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; fn test_error_is_used_as_an_argument() {", 1783, 0], [";; fn test_error_is_used_as_an_argument() {", 1783, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; fn test_error_is_used_as_an_argument() {", 1783, 0], [";; fn test_error_is_used_as_an_argument() {", 1783, 0])
   Call: (270) [system] compound_name_arguments(_5986, '$COMMENT', [";; fn test_error_is_used_as_an_argument() {", 1783, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT', [";; fn test_error_is_used_as_an_argument() {", 1783, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0)\=@='$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _5972)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _17996))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _17996))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _17996))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _17996))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _17996)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _17996)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _23582))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _23582))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _23582)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _23582)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _23582)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0)\=@='$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _17996)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _5952))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _5952))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _5952))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _5952))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _5952)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _45902))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _45902))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _45902)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _45902)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _45902)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0)))
   Call: (267) [system] '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0)\=@='$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _5952)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0)))
   Call: (261) [system] '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0)\=@='$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _74680, [], _74682)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _74680, [], _74682)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _74680, [], _74682)
   Call: (258) [system] atom('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _74680, [], _74682)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _74680, [], _74682)
   Call: (258) [system] compound('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
   Exit: (258) [system] compound('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), _83996, _83998)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT', [";; fn test_error_is_used_as_an_argument() {", 1783, 0])
^  Call: (258) [user] subst_vars([";; fn test_error_is_used_as_an_argument() {", 1783, 0], _85882, [], _74682)
^  Unify: (258) [user] subst_vars([";; fn test_error_is_used_as_an_argument() {", 1783, 0], [";; fn test_error_is_used_as_an_argument() {", 1783, 0], [], [])
   Call: (259) [system] var([";; fn test_error_is_used_as_an_argument() {", 1783, 0])
^  Redo: (258) [user] subst_vars([";; fn test_error_is_used_as_an_argument() {", 1783, 0], _85882, [], _74682)
^  Unify: (258) [user] subst_vars([";; fn test_error_is_used_as_an_argument() {", 1783, 0], [_89618|_89620], [], _74682)
^  Call: (259) [user] subst_vars(";; fn test_error_is_used_as_an_argument() {", _89618, [], _90558)
^  Unify: (259) [user] subst_vars(";; fn test_error_is_used_as_an_argument() {", ";; fn test_error_is_used_as_an_argument() {", [], [])
   Call: (260) [system] var(";; fn test_error_is_used_as_an_argument() {")
^  Redo: (259) [user] subst_vars(";; fn test_error_is_used_as_an_argument() {", _89618, [], _90558)
^  Unify: (259) [user] subst_vars(";; fn test_error_is_used_as_an_argument() {", _89618, [], _90558)
   Call: (260) [system] atom(";; fn test_error_is_used_as_an_argument() {")
^  Redo: (259) [user] subst_vars(";; fn test_error_is_used_as_an_argument() {", _89618, [], _90558)
^  Unify: (259) [user] subst_vars(";; fn test_error_is_used_as_an_argument() {", _89618, [], _90558)
   Call: (260) [system] compound(";; fn test_error_is_used_as_an_argument() {")
^  Redo: (259) [user] subst_vars(";; fn test_error_is_used_as_an_argument() {", _89618, [], _90558)
^  Unify: (259) [user] subst_vars(";; fn test_error_is_used_as_an_argument() {", ";; fn test_error_is_used_as_an_argument() {", [], [])
^  Exit: (259) [user] subst_vars(";; fn test_error_is_used_as_an_argument() {", ";; fn test_error_is_used_as_an_argument() {", [], [])
^  Call: (259) [user] subst_vars([1783, 0], _89620, [], _74682)
^  Unify: (259) [user] subst_vars([1783, 0], [1783, 0], [], [])
   Call: (260) [system] var([1783, 0])
^  Redo: (259) [user] subst_vars([1783, 0], _89620, [], _74682)
^  Unify: (259) [user] subst_vars([1783, 0], [_105490|_105492], [], _74682)
^  Call: (260) [user] subst_vars(1783, _105490, [], _106430)
^  Unify: (260) [user] subst_vars(1783, 1783, [], [])
   Call: (261) [system] var(1783)
^  Redo: (260) [user] subst_vars(1783, _105490, [], _106430)
^  Unify: (260) [user] subst_vars(1783, _105490, [], _106430)
   Call: (261) [system] atom(1783)
^  Redo: (260) [user] subst_vars(1783, _105490, [], _106430)
^  Unify: (260) [user] subst_vars(1783, _105490, [], _106430)
   Call: (261) [system] compound(1783)
^  Redo: (260) [user] subst_vars(1783, _105490, [], _106430)
^  Unify: (260) [user] subst_vars(1783, 1783, [], [])
^  Exit: (260) [user] subst_vars(1783, 1783, [], [])
^  Call: (260) [user] subst_vars([0], _105492, [], _74682)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _105492, [], _74682)
^  Unify: (260) [user] subst_vars([0], [_121362|_121364], [], _74682)
^  Call: (261) [user] subst_vars(0, _121362, [], _122302)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _121362, [], _122302)
^  Unify: (261) [user] subst_vars(0, _121362, [], _122302)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _121362, [], _122302)
^  Unify: (261) [user] subst_vars(0, _121362, [], _122302)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _121362, [], _122302)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _121364, [], _74682)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _121364, [], _74682)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1783, 0], [1783, 0], [], [])
^  Exit: (258) [user] subst_vars([";; fn test_error_is_used_as_an_argument() {", 1783, 0], [";; fn test_error_is_used_as_an_argument() {", 1783, 0], [], [])
   Call: (258) [system] compound_name_arguments(_74680, '$COMMENT', [";; fn test_error_is_used_as_an_argument() {", 1783, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT', [";; fn test_error_is_used_as_an_argument() {", 1783, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), [], [])
   Call: (257) [system] _144720=metta_file_buffer(+, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; fn test_error_is_used_as_an_argument() {", 1783, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1784, 0, 63477, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$stream_position'(63477, 1784, 0, 63511)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _197450))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _197450))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _197450)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _197450)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _197450)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _197450)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _203062))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _203062))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _203062))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _203062))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _203062)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _203062)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _208648))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _208648))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _208648)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _208648)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _208648)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _208648)
   Call: (270) [system] var('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _208648)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$VAR'(_216108))
   Call: (270) [system] atom('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _208648)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _208648)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _208648)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _208648)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _208648)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _208648)
   Call: (270) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0)==[_225388, _225394]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _208648)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _208648)
   Call: (270) [system] is_list('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _208648)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _208648)
   Call: (270) [system] string('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _208648)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _208648)
   Call: (270) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _235590, _235592)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0], _239332)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0], _239332)
   Call: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0], _239332, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0], [_242150|_242152], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _242150)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _242150)
   Call: (273) [system] var(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _242150)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", '$VAR'(_246796))
   Call: (273) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _242150)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _242150)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==true
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _242150)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _242150)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==false
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _242150)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _242150)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"==[_256076, _256082]
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _242150)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _242150)
   Call: (273) [system] is_list(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _242150)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _242150)
   Call: (273) [system] string(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Exit: (273) [system] string(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _242150)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _242150)
   Call: (273) [system] compound(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _242150)
^  Unify: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _242150)
^  Call: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Unify: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (274) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Fail: (274) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Fail: (273) [user] symbol(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _242150)
   Call: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"=_242150
   Exit: (273) [system] ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"=";;     let metta = Metta::new(Some(EnvBuilder::test_env()));"
^  Exit: (272) [user] mfix_vars1(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
   Call: (272) [apply] apply:maplist_([1784, 0], _242152, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1784, 0], [_280148|_280150], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1784, _280148)
^  Unify: (273) [user] mfix_vars1(1784, _280148)
   Call: (274) [system] var(1784)
^  Redo: (273) [user] mfix_vars1(1784, _280148)
^  Unify: (273) [user] mfix_vars1(1784, '$VAR'(_284794))
   Call: (274) [system] atom(1784)
^  Redo: (273) [user] mfix_vars1(1784, _280148)
^  Unify: (273) [user] mfix_vars1(1784, _280148)
   Call: (274) [system] 1784==true
^  Redo: (273) [user] mfix_vars1(1784, _280148)
^  Unify: (273) [user] mfix_vars1(1784, _280148)
   Call: (274) [system] 1784==false
^  Redo: (273) [user] mfix_vars1(1784, _280148)
^  Unify: (273) [user] mfix_vars1(1784, _280148)
   Call: (274) [system] 1784==[_294074, _294080]
^  Redo: (273) [user] mfix_vars1(1784, _280148)
^  Unify: (273) [user] mfix_vars1(1784, _280148)
   Call: (274) [system] is_list(1784)
^  Redo: (273) [user] mfix_vars1(1784, _280148)
^  Unify: (273) [user] mfix_vars1(1784, _280148)
   Call: (274) [system] string(1784)
^  Redo: (273) [user] mfix_vars1(1784, _280148)
^  Unify: (273) [user] mfix_vars1(1784, _280148)
   Call: (274) [system] compound(1784)
^  Redo: (273) [user] mfix_vars1(1784, _280148)
^  Unify: (273) [user] mfix_vars1(1784, _280148)
^  Call: (274) [user] symbol(1784)
^  Unify: (274) [user] symbol(1784)
   Call: (275) [system] atom(1784)
   Fail: (275) [system] atom(1784)
^  Fail: (274) [user] symbol(1784)
^  Redo: (273) [user] mfix_vars1(1784, _280148)
   Call: (274) [system] 1784=_280148
   Exit: (274) [system] 1784=1784
^  Exit: (273) [user] mfix_vars1(1784, 1784)
   Call: (273) [apply] apply:maplist_([0], _280150, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_314474|_314476], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _314474)
^  Unify: (274) [user] mfix_vars1(0, _314474)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _314474)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_319120))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _314474)
^  Unify: (274) [user] mfix_vars1(0, _314474)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _314474)
^  Unify: (274) [user] mfix_vars1(0, _314474)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _314474)
^  Unify: (274) [user] mfix_vars1(0, _314474)
   Call: (275) [system] 0==[_328400, _328406]
^  Redo: (274) [user] mfix_vars1(0, _314474)
^  Unify: (274) [user] mfix_vars1(0, _314474)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _314474)
^  Unify: (274) [user] mfix_vars1(0, _314474)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _314474)
^  Unify: (274) [user] mfix_vars1(0, _314474)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _314474)
^  Unify: (274) [user] mfix_vars1(0, _314474)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _314474)
   Call: (275) [system] 0=_314474
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _314476, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1784, 0], [1784, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0])
   Call: (270) [system] compound_name_arguments(_208648, '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _203062)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _364648))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _364648))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _364648))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _364648))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _364648)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _364648)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _370234))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _370234))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _370234)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _370234)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _370234)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _364648)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _197450))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _197450))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _197450))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _197450))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _197450)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _197450)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _392554))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _392554))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _392554)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _392554)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _392554)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0)))
   Call: (267) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _197450)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0)))
   Call: (261) [system] '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0)\=@='$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _421332, [], _421334)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _421332, [], _421334)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _421332, [], _421334)
   Call: (258) [system] atom('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _421332, [], _421334)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _421332, [], _421334)
   Call: (258) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), _430648, _430650)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0])
^  Call: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0], _432534, [], _421334)
^  Unify: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0], [], [])
   Call: (259) [system] var([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0])
^  Redo: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0], _432534, [], _421334)
^  Unify: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0], [_436270|_436272], [], _421334)
^  Call: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _436270, [], _437210)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
   Call: (260) [system] var(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _436270, [], _437210)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _436270, [], _437210)
   Call: (260) [system] atom(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _436270, [], _437210)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _436270, [], _437210)
   Call: (260) [system] compound(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));")
^  Redo: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", _436270, [], _437210)
^  Unify: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Exit: (259) [user] subst_vars(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", ";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", [], [])
^  Call: (259) [user] subst_vars([1784, 0], _436272, [], _421334)
^  Unify: (259) [user] subst_vars([1784, 0], [1784, 0], [], [])
   Call: (260) [system] var([1784, 0])
^  Redo: (259) [user] subst_vars([1784, 0], _436272, [], _421334)
^  Unify: (259) [user] subst_vars([1784, 0], [_452142|_452144], [], _421334)
^  Call: (260) [user] subst_vars(1784, _452142, [], _453082)
^  Unify: (260) [user] subst_vars(1784, 1784, [], [])
   Call: (261) [system] var(1784)
^  Redo: (260) [user] subst_vars(1784, _452142, [], _453082)
^  Unify: (260) [user] subst_vars(1784, _452142, [], _453082)
   Call: (261) [system] atom(1784)
^  Redo: (260) [user] subst_vars(1784, _452142, [], _453082)
^  Unify: (260) [user] subst_vars(1784, _452142, [], _453082)
   Call: (261) [system] compound(1784)
^  Redo: (260) [user] subst_vars(1784, _452142, [], _453082)
^  Unify: (260) [user] subst_vars(1784, 1784, [], [])
^  Exit: (260) [user] subst_vars(1784, 1784, [], [])
^  Call: (260) [user] subst_vars([0], _452144, [], _421334)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _452144, [], _421334)
^  Unify: (260) [user] subst_vars([0], [_468014|_468016], [], _421334)
^  Call: (261) [user] subst_vars(0, _468014, [], _468954)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _468014, [], _468954)
^  Unify: (261) [user] subst_vars(0, _468014, [], _468954)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _468014, [], _468954)
^  Unify: (261) [user] subst_vars(0, _468014, [], _468954)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _468014, [], _468954)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _468016, [], _421334)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _468016, [], _421334)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1784, 0], [1784, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0], [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0], [], [])
   Call: (258) [system] compound_name_arguments(_421332, '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT', [";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), [], [])
   Call: (257) [system] _491372=metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let metta = Metta::new(Some(EnvBuilder::test_env()));", 1784, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1785, 0, 63538, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$stream_position'(63538, 1785, 0, 63572)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _26792))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _26792))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _26792)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _26792)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _26792)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _26792)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _32404))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _32404))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _32404))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _32404))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _32404)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _32404)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _37990))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _37990))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _37990)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _37990)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _37990)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _37990)
   Call: (270) [system] var('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _37990)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$VAR'(_45450))
   Call: (270) [system] atom('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _37990)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _37990)
   Call: (270) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _37990)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _37990)
   Call: (270) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _37990)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _37990)
   Call: (270) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0)==[_54730, _54736]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _37990)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _37990)
   Call: (270) [system] is_list('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _37990)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _37990)
   Call: (270) [system] string('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _37990)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _37990)
   Call: (270) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _64932, _64934)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1785, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     let parser = SExprParser::new(r#\"", 1785, 0], _68674)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let parser = SExprParser::new(r#\"", 1785, 0], _68674)
   Call: (271) [apply] apply:maplist_([";;     let parser = SExprParser::new(r#\"", 1785, 0], _68674, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     let parser = SExprParser::new(r#\"", 1785, 0], [_71492|_71494], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _71492)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _71492)
   Call: (273) [system] var(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _71492)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", '$VAR'(_76138))
   Call: (273) [system] atom(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _71492)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _71492)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""==true
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _71492)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _71492)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""==false
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _71492)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _71492)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""==[_85418, _85424]
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _71492)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _71492)
   Call: (273) [system] is_list(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _71492)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _71492)
   Call: (273) [system] string(";;     let parser = SExprParser::new(r#\"")
   Exit: (273) [system] string(";;     let parser = SExprParser::new(r#\"")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _71492)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _71492)
   Call: (273) [system] compound(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _71492)
^  Unify: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _71492)
^  Call: (273) [user] symbol(";;     let parser = SExprParser::new(r#\"")
^  Unify: (273) [user] symbol(";;     let parser = SExprParser::new(r#\"")
   Call: (274) [system] atom(";;     let parser = SExprParser::new(r#\"")
   Fail: (274) [system] atom(";;     let parser = SExprParser::new(r#\"")
^  Fail: (273) [user] symbol(";;     let parser = SExprParser::new(r#\"")
^  Redo: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", _71492)
   Call: (273) [system] ";;     let parser = SExprParser::new(r#\""=_71492
   Exit: (273) [system] ";;     let parser = SExprParser::new(r#\""=";;     let parser = SExprParser::new(r#\""
^  Exit: (272) [user] mfix_vars1(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"")
   Call: (272) [apply] apply:maplist_([1785, 0], _71494, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1785, 0], [_109490|_109492], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1785, _109490)
^  Unify: (273) [user] mfix_vars1(1785, _109490)
   Call: (274) [system] var(1785)
^  Redo: (273) [user] mfix_vars1(1785, _109490)
^  Unify: (273) [user] mfix_vars1(1785, '$VAR'(_114136))
   Call: (274) [system] atom(1785)
^  Redo: (273) [user] mfix_vars1(1785, _109490)
^  Unify: (273) [user] mfix_vars1(1785, _109490)
   Call: (274) [system] 1785==true
^  Redo: (273) [user] mfix_vars1(1785, _109490)
^  Unify: (273) [user] mfix_vars1(1785, _109490)
   Call: (274) [system] 1785==false
^  Redo: (273) [user] mfix_vars1(1785, _109490)
^  Unify: (273) [user] mfix_vars1(1785, _109490)
   Call: (274) [system] 1785==[_123416, _123422]
^  Redo: (273) [user] mfix_vars1(1785, _109490)
^  Unify: (273) [user] mfix_vars1(1785, _109490)
   Call: (274) [system] is_list(1785)
^  Redo: (273) [user] mfix_vars1(1785, _109490)
^  Unify: (273) [user] mfix_vars1(1785, _109490)
   Call: (274) [system] string(1785)
^  Redo: (273) [user] mfix_vars1(1785, _109490)
^  Unify: (273) [user] mfix_vars1(1785, _109490)
   Call: (274) [system] compound(1785)
^  Redo: (273) [user] mfix_vars1(1785, _109490)
^  Unify: (273) [user] mfix_vars1(1785, _109490)
^  Call: (274) [user] symbol(1785)
^  Unify: (274) [user] symbol(1785)
   Call: (275) [system] atom(1785)
   Fail: (275) [system] atom(1785)
^  Fail: (274) [user] symbol(1785)
^  Redo: (273) [user] mfix_vars1(1785, _109490)
   Call: (274) [system] 1785=_109490
   Exit: (274) [system] 1785=1785
^  Exit: (273) [user] mfix_vars1(1785, 1785)
   Call: (273) [apply] apply:maplist_([0], _109492, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_143816|_143818], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _143816)
^  Unify: (274) [user] mfix_vars1(0, _143816)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _143816)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_148462))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _143816)
^  Unify: (274) [user] mfix_vars1(0, _143816)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _143816)
^  Unify: (274) [user] mfix_vars1(0, _143816)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _143816)
^  Unify: (274) [user] mfix_vars1(0, _143816)
   Call: (275) [system] 0==[_157742, _157748]
^  Redo: (274) [user] mfix_vars1(0, _143816)
^  Unify: (274) [user] mfix_vars1(0, _143816)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _143816)
^  Unify: (274) [user] mfix_vars1(0, _143816)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _143816)
^  Unify: (274) [user] mfix_vars1(0, _143816)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _143816)
^  Unify: (274) [user] mfix_vars1(0, _143816)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _143816)
   Call: (275) [system] 0=_143816
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _143818, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1785, 0], [1785, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     let parser = SExprParser::new(r#\"", 1785, 0], [";;     let parser = SExprParser::new(r#\"", 1785, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     let parser = SExprParser::new(r#\"", 1785, 0], [";;     let parser = SExprParser::new(r#\"", 1785, 0])
   Call: (270) [system] compound_name_arguments(_37990, '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1785, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1785, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0)))
   Call: (267) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _32404)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _193990))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _193990))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _193990))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _193990))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _193990)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _193990)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _199576))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _199576))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _199576)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _199576)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _199576)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0)))
   Call: (267) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _193990)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _26792))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _26792))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _26792))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _26792))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _26792)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _26792)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _221896))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _221896))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _221896)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _221896)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _221896)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0)))
   Call: (267) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _26792)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0)))
   Call: (261) [system] '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0)\=@='$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _250674, [], _250676)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _250674, [], _250676)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _250674, [], _250676)
   Call: (258) [system] atom('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _250674, [], _250676)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _250674, [], _250676)
   Call: (258) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), _259990, _259992)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1785, 0])
^  Call: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1785, 0], _261876, [], _250676)
^  Unify: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1785, 0], [";;     let parser = SExprParser::new(r#\"", 1785, 0], [], [])
   Call: (259) [system] var([";;     let parser = SExprParser::new(r#\"", 1785, 0])
^  Redo: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1785, 0], _261876, [], _250676)
^  Unify: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1785, 0], [_265612|_265614], [], _250676)
^  Call: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _265612, [], _266552)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"", [], [])
   Call: (260) [system] var(";;     let parser = SExprParser::new(r#\"")
^  Redo: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _265612, [], _266552)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _265612, [], _266552)
   Call: (260) [system] atom(";;     let parser = SExprParser::new(r#\"")
^  Redo: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _265612, [], _266552)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _265612, [], _266552)
   Call: (260) [system] compound(";;     let parser = SExprParser::new(r#\"")
^  Redo: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", _265612, [], _266552)
^  Unify: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"", [], [])
^  Exit: (259) [user] subst_vars(";;     let parser = SExprParser::new(r#\"", ";;     let parser = SExprParser::new(r#\"", [], [])
^  Call: (259) [user] subst_vars([1785, 0], _265614, [], _250676)
^  Unify: (259) [user] subst_vars([1785, 0], [1785, 0], [], [])
   Call: (260) [system] var([1785, 0])
^  Redo: (259) [user] subst_vars([1785, 0], _265614, [], _250676)
^  Unify: (259) [user] subst_vars([1785, 0], [_281484|_281486], [], _250676)
^  Call: (260) [user] subst_vars(1785, _281484, [], _282424)
^  Unify: (260) [user] subst_vars(1785, 1785, [], [])
   Call: (261) [system] var(1785)
^  Redo: (260) [user] subst_vars(1785, _281484, [], _282424)
^  Unify: (260) [user] subst_vars(1785, _281484, [], _282424)
   Call: (261) [system] atom(1785)
^  Redo: (260) [user] subst_vars(1785, _281484, [], _282424)
^  Unify: (260) [user] subst_vars(1785, _281484, [], _282424)
   Call: (261) [system] compound(1785)
^  Redo: (260) [user] subst_vars(1785, _281484, [], _282424)
^  Unify: (260) [user] subst_vars(1785, 1785, [], [])
^  Exit: (260) [user] subst_vars(1785, 1785, [], [])
^  Call: (260) [user] subst_vars([0], _281486, [], _250676)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _281486, [], _250676)
^  Unify: (260) [user] subst_vars([0], [_297356|_297358], [], _250676)
^  Call: (261) [user] subst_vars(0, _297356, [], _298296)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _297356, [], _298296)
^  Unify: (261) [user] subst_vars(0, _297356, [], _298296)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _297356, [], _298296)
^  Unify: (261) [user] subst_vars(0, _297356, [], _298296)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _297356, [], _298296)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _297358, [], _250676)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _297358, [], _250676)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1785, 0], [1785, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     let parser = SExprParser::new(r#\"", 1785, 0], [";;     let parser = SExprParser::new(r#\"", 1785, 0], [], [])
   Call: (258) [system] compound_name_arguments(_250674, '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1785, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT', [";;     let parser = SExprParser::new(r#\"", 1785, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), [], [])
   Call: (257) [system] _320714=metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     let parser = SExprParser::new(r#\"", 1785, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1786, 0, 63579, '$COMMENT'(";;         !(get-type Error)", 1786, 0), '$stream_position'(63579, 1786, 0, 63613)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _373436))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _373436))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _373436)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _373436)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-type Error)", 1786, 0), _373436)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-type Error)", 1786, 0), _373436)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _379048))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _379048))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _379048))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _379048))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _379048)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _379048)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _384634))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _384634))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _384634)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _384634)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type Error)", 1786, 0), _384634)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type Error)", 1786, 0), _384634)
   Call: (270) [system] var('$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type Error)", 1786, 0), _384634)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type Error)", 1786, 0), '$VAR'(_392094))
   Call: (270) [system] atom('$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type Error)", 1786, 0), _384634)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type Error)", 1786, 0), _384634)
   Call: (270) [system] '$COMMENT'(";;         !(get-type Error)", 1786, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type Error)", 1786, 0), _384634)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type Error)", 1786, 0), _384634)
   Call: (270) [system] '$COMMENT'(";;         !(get-type Error)", 1786, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type Error)", 1786, 0), _384634)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type Error)", 1786, 0), _384634)
   Call: (270) [system] '$COMMENT'(";;         !(get-type Error)", 1786, 0)==[_401374, _401380]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type Error)", 1786, 0), _384634)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type Error)", 1786, 0), _384634)
   Call: (270) [system] is_list('$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type Error)", 1786, 0), _384634)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type Error)", 1786, 0), _384634)
   Call: (270) [system] string('$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type Error)", 1786, 0), _384634)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type Error)", 1786, 0), _384634)
   Call: (270) [system] compound('$COMMENT'(";;         !(get-type Error)", 1786, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         !(get-type Error)", 1786, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-type Error)", 1786, 0), _411576, _411578)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT', [";;         !(get-type Error)", 1786, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         !(get-type Error)", 1786, 0], _415318)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(get-type Error)", 1786, 0], _415318)
   Call: (271) [apply] apply:maplist_([";;         !(get-type Error)", 1786, 0], _415318, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         !(get-type Error)", 1786, 0], [_418136|_418138], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         !(get-type Error)", _418136)
^  Unify: (272) [user] mfix_vars1(";;         !(get-type Error)", _418136)
   Call: (273) [system] var(";;         !(get-type Error)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-type Error)", _418136)
^  Unify: (272) [user] mfix_vars1(";;         !(get-type Error)", '$VAR'(_422782))
   Call: (273) [system] atom(";;         !(get-type Error)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-type Error)", _418136)
^  Unify: (272) [user] mfix_vars1(";;         !(get-type Error)", _418136)
   Call: (273) [system] ";;         !(get-type Error)"==true
^  Redo: (272) [user] mfix_vars1(";;         !(get-type Error)", _418136)
^  Unify: (272) [user] mfix_vars1(";;         !(get-type Error)", _418136)
   Call: (273) [system] ";;         !(get-type Error)"==false
^  Redo: (272) [user] mfix_vars1(";;         !(get-type Error)", _418136)
^  Unify: (272) [user] mfix_vars1(";;         !(get-type Error)", _418136)
   Call: (273) [system] ";;         !(get-type Error)"==[_432062, _432068]
^  Redo: (272) [user] mfix_vars1(";;         !(get-type Error)", _418136)
^  Unify: (272) [user] mfix_vars1(";;         !(get-type Error)", _418136)
   Call: (273) [system] is_list(";;         !(get-type Error)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-type Error)", _418136)
^  Unify: (272) [user] mfix_vars1(";;         !(get-type Error)", _418136)
   Call: (273) [system] string(";;         !(get-type Error)")
   Exit: (273) [system] string(";;         !(get-type Error)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         !(get-type Error)", _418136)
^  Unify: (272) [user] mfix_vars1(";;         !(get-type Error)", _418136)
   Call: (273) [system] compound(";;         !(get-type Error)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-type Error)", _418136)
^  Unify: (272) [user] mfix_vars1(";;         !(get-type Error)", _418136)
^  Call: (273) [user] symbol(";;         !(get-type Error)")
^  Unify: (273) [user] symbol(";;         !(get-type Error)")
   Call: (274) [system] atom(";;         !(get-type Error)")
   Fail: (274) [system] atom(";;         !(get-type Error)")
^  Fail: (273) [user] symbol(";;         !(get-type Error)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-type Error)", _418136)
   Call: (273) [system] ";;         !(get-type Error)"=_418136
   Exit: (273) [system] ";;         !(get-type Error)"=";;         !(get-type Error)"
^  Exit: (272) [user] mfix_vars1(";;         !(get-type Error)", ";;         !(get-type Error)")
   Call: (272) [apply] apply:maplist_([1786, 0], _418138, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1786, 0], [_456134|_456136], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1786, _456134)
^  Unify: (273) [user] mfix_vars1(1786, _456134)
   Call: (274) [system] var(1786)
^  Redo: (273) [user] mfix_vars1(1786, _456134)
^  Unify: (273) [user] mfix_vars1(1786, '$VAR'(_460780))
   Call: (274) [system] atom(1786)
^  Redo: (273) [user] mfix_vars1(1786, _456134)
^  Unify: (273) [user] mfix_vars1(1786, _456134)
   Call: (274) [system] 1786==true
^  Redo: (273) [user] mfix_vars1(1786, _456134)
^  Unify: (273) [user] mfix_vars1(1786, _456134)
   Call: (274) [system] 1786==false
^  Redo: (273) [user] mfix_vars1(1786, _456134)
^  Unify: (273) [user] mfix_vars1(1786, _456134)
   Call: (274) [system] 1786==[_470060, _470066]
^  Redo: (273) [user] mfix_vars1(1786, _456134)
^  Unify: (273) [user] mfix_vars1(1786, _456134)
   Call: (274) [system] is_list(1786)
^  Redo: (273) [user] mfix_vars1(1786, _456134)
^  Unify: (273) [user] mfix_vars1(1786, _456134)
   Call: (274) [system] string(1786)
^  Redo: (273) [user] mfix_vars1(1786, _456134)
^  Unify: (273) [user] mfix_vars1(1786, _456134)
   Call: (274) [system] compound(1786)
^  Redo: (273) [user] mfix_vars1(1786, _456134)
^  Unify: (273) [user] mfix_vars1(1786, _456134)
^  Call: (274) [user] symbol(1786)
^  Unify: (274) [user] symbol(1786)
   Call: (275) [system] atom(1786)
   Fail: (275) [system] atom(1786)
^  Fail: (274) [user] symbol(1786)
^  Redo: (273) [user] mfix_vars1(1786, _456134)
   Call: (274) [system] 1786=_456134
   Exit: (274) [system] 1786=1786
^  Exit: (273) [user] mfix_vars1(1786, 1786)
   Call: (273) [apply] apply:maplist_([0], _456136, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_490460|_490462], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _490460)
^  Unify: (274) [user] mfix_vars1(0, _490460)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _490460)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_495106))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _490460)
^  Unify: (274) [user] mfix_vars1(0, _490460)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _490460)
^  Unify: (274) [user] mfix_vars1(0, _490460)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _490460)
^  Unify: (274) [user] mfix_vars1(0, _490460)
   Call: (275) [system] 0==[_504386, _504392]
^  Redo: (274) [user] mfix_vars1(0, _490460)
^  Unify: (274) [user] mfix_vars1(0, _490460)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _490460)
^  Unify: (274) [user] mfix_vars1(0, _490460)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _490460)
^  Unify: (274) [user] mfix_vars1(0, _490460)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _490460)
^  Unify: (274) [user] mfix_vars1(0, _490460)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _490460)
   Call: (275) [system] 0=_490460
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6042, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1786, 0], [1786, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         !(get-type Error)", 1786, 0], [";;         !(get-type Error)", 1786, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(get-type Error)", 1786, 0], [";;         !(get-type Error)", 1786, 0])
   Call: (270) [system] compound_name_arguments(_5982, '$COMMENT', [";;         !(get-type Error)", 1786, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT', [";;         !(get-type Error)", 1786, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-type Error)", 1786, 0)\=@='$COMMENT'(";;         !(get-type Error)", 1786, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _5968)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _22682))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _22682))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _22682))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _22682))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _22682)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _22682)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _28268))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _28268))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _28268)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _28268)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         !(get-type Error)", 1786, 0), _28268)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-type Error)", 1786, 0)\=@='$COMMENT'(";;         !(get-type Error)", 1786, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _22682)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _5948))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _5948))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _5948))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _5948))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _5948)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _50588))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _50588))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _50588)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _50588)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         !(get-type Error)", 1786, 0), _50588)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-type Error)", 1786, 0)\=@='$COMMENT'(";;         !(get-type Error)", 1786, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _5948)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0)))
   Call: (261) [system] '$COMMENT'(";;         !(get-type Error)", 1786, 0)\=@='$COMMENT'(";;         !(get-type Error)", 1786, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-type Error)", 1786, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         !(get-type Error)", 1786, 0), _79366, [], _79368)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(get-type Error)", 1786, 0), _79366, [], _79368)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-type Error)", 1786, 0), _79366, [], _79368)
   Call: (258) [system] atom('$COMMENT'(";;         !(get-type Error)", 1786, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(get-type Error)", 1786, 0), _79366, [], _79368)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-type Error)", 1786, 0), _79366, [], _79368)
   Call: (258) [system] compound('$COMMENT'(";;         !(get-type Error)", 1786, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         !(get-type Error)", 1786, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-type Error)", 1786, 0), _88682, _88684)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT', [";;         !(get-type Error)", 1786, 0])
^  Call: (258) [user] subst_vars([";;         !(get-type Error)", 1786, 0], _90568, [], _79368)
^  Unify: (258) [user] subst_vars([";;         !(get-type Error)", 1786, 0], [";;         !(get-type Error)", 1786, 0], [], [])
   Call: (259) [system] var([";;         !(get-type Error)", 1786, 0])
^  Redo: (258) [user] subst_vars([";;         !(get-type Error)", 1786, 0], _90568, [], _79368)
^  Unify: (258) [user] subst_vars([";;         !(get-type Error)", 1786, 0], [_94304|_94306], [], _79368)
^  Call: (259) [user] subst_vars(";;         !(get-type Error)", _94304, [], _95244)
^  Unify: (259) [user] subst_vars(";;         !(get-type Error)", ";;         !(get-type Error)", [], [])
   Call: (260) [system] var(";;         !(get-type Error)")
^  Redo: (259) [user] subst_vars(";;         !(get-type Error)", _94304, [], _95244)
^  Unify: (259) [user] subst_vars(";;         !(get-type Error)", _94304, [], _95244)
   Call: (260) [system] atom(";;         !(get-type Error)")
^  Redo: (259) [user] subst_vars(";;         !(get-type Error)", _94304, [], _95244)
^  Unify: (259) [user] subst_vars(";;         !(get-type Error)", _94304, [], _95244)
   Call: (260) [system] compound(";;         !(get-type Error)")
^  Redo: (259) [user] subst_vars(";;         !(get-type Error)", _94304, [], _95244)
^  Unify: (259) [user] subst_vars(";;         !(get-type Error)", ";;         !(get-type Error)", [], [])
^  Exit: (259) [user] subst_vars(";;         !(get-type Error)", ";;         !(get-type Error)", [], [])
^  Call: (259) [user] subst_vars([1786, 0], _94306, [], _79368)
^  Unify: (259) [user] subst_vars([1786, 0], [1786, 0], [], [])
   Call: (260) [system] var([1786, 0])
^  Redo: (259) [user] subst_vars([1786, 0], _94306, [], _79368)
^  Unify: (259) [user] subst_vars([1786, 0], [_110176|_110178], [], _79368)
^  Call: (260) [user] subst_vars(1786, _110176, [], _111116)
^  Unify: (260) [user] subst_vars(1786, 1786, [], [])
   Call: (261) [system] var(1786)
^  Redo: (260) [user] subst_vars(1786, _110176, [], _111116)
^  Unify: (260) [user] subst_vars(1786, _110176, [], _111116)
   Call: (261) [system] atom(1786)
^  Redo: (260) [user] subst_vars(1786, _110176, [], _111116)
^  Unify: (260) [user] subst_vars(1786, _110176, [], _111116)
   Call: (261) [system] compound(1786)
^  Redo: (260) [user] subst_vars(1786, _110176, [], _111116)
^  Unify: (260) [user] subst_vars(1786, 1786, [], [])
^  Exit: (260) [user] subst_vars(1786, 1786, [], [])
^  Call: (260) [user] subst_vars([0], _110178, [], _79368)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _110178, [], _79368)
^  Unify: (260) [user] subst_vars([0], [_126048|_126050], [], _79368)
^  Call: (261) [user] subst_vars(0, _126048, [], _126988)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _126048, [], _126988)
^  Unify: (261) [user] subst_vars(0, _126048, [], _126988)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _126048, [], _126988)
^  Unify: (261) [user] subst_vars(0, _126048, [], _126988)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _126048, [], _126988)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _126050, [], _79368)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _126050, [], _79368)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1786, 0], [1786, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         !(get-type Error)", 1786, 0], [";;         !(get-type Error)", 1786, 0], [], [])
   Call: (258) [system] compound_name_arguments(_79366, '$COMMENT', [";;         !(get-type Error)", 1786, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT', [";;         !(get-type Error)", 1786, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         !(get-type Error)", 1786, 0), '$COMMENT'(";;         !(get-type Error)", 1786, 0), [], [])
   Call: (257) [system] _149406=metta_file_buffer(+, '$COMMENT'(";;         !(get-type Error)", 1786, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         !(get-type Error)", 1786, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         !(get-type Error)", 1786, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(get-type Error)", 1786, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(get-type Error)", 1786, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-type Error)", 1786, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-type Error)", 1786, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-type Error)", 1786, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-type Error)", 1786, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1787, 0, 63608, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$stream_position'(63608, 1787, 0, 63642)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _202130))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _202130))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _202130)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _202130)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _202130)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _202130)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _207742))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _207742))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _207742))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _207742))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _207742)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _207742)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _213328))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _213328))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _213328)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _213328)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _213328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _213328)
   Call: (270) [system] var('$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _213328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$VAR'(_220788))
   Call: (270) [system] atom('$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _213328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _213328)
   Call: (270) [system] '$COMMENT'(";;         !(get-metatype Error)", 1787, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _213328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _213328)
   Call: (270) [system] '$COMMENT'(";;         !(get-metatype Error)", 1787, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _213328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _213328)
   Call: (270) [system] '$COMMENT'(";;         !(get-metatype Error)", 1787, 0)==[_230068, _230074]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _213328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _213328)
   Call: (270) [system] is_list('$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _213328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _213328)
   Call: (270) [system] string('$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _213328)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _213328)
   Call: (270) [system] compound('$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _240270, _240272)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT', [";;         !(get-metatype Error)", 1787, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         !(get-metatype Error)", 1787, 0], _244012)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(get-metatype Error)", 1787, 0], _244012)
   Call: (271) [apply] apply:maplist_([";;         !(get-metatype Error)", 1787, 0], _244012, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         !(get-metatype Error)", 1787, 0], [_246830|_246832], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         !(get-metatype Error)", _246830)
^  Unify: (272) [user] mfix_vars1(";;         !(get-metatype Error)", _246830)
   Call: (273) [system] var(";;         !(get-metatype Error)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-metatype Error)", _246830)
^  Unify: (272) [user] mfix_vars1(";;         !(get-metatype Error)", '$VAR'(_251476))
   Call: (273) [system] atom(";;         !(get-metatype Error)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-metatype Error)", _246830)
^  Unify: (272) [user] mfix_vars1(";;         !(get-metatype Error)", _246830)
   Call: (273) [system] ";;         !(get-metatype Error)"==true
^  Redo: (272) [user] mfix_vars1(";;         !(get-metatype Error)", _246830)
^  Unify: (272) [user] mfix_vars1(";;         !(get-metatype Error)", _246830)
   Call: (273) [system] ";;         !(get-metatype Error)"==false
^  Redo: (272) [user] mfix_vars1(";;         !(get-metatype Error)", _246830)
^  Unify: (272) [user] mfix_vars1(";;         !(get-metatype Error)", _246830)
   Call: (273) [system] ";;         !(get-metatype Error)"==[_260756, _260762]
^  Redo: (272) [user] mfix_vars1(";;         !(get-metatype Error)", _246830)
^  Unify: (272) [user] mfix_vars1(";;         !(get-metatype Error)", _246830)
   Call: (273) [system] is_list(";;         !(get-metatype Error)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-metatype Error)", _246830)
^  Unify: (272) [user] mfix_vars1(";;         !(get-metatype Error)", _246830)
   Call: (273) [system] string(";;         !(get-metatype Error)")
   Exit: (273) [system] string(";;         !(get-metatype Error)")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         !(get-metatype Error)", _246830)
^  Unify: (272) [user] mfix_vars1(";;         !(get-metatype Error)", _246830)
   Call: (273) [system] compound(";;         !(get-metatype Error)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-metatype Error)", _246830)
^  Unify: (272) [user] mfix_vars1(";;         !(get-metatype Error)", _246830)
^  Call: (273) [user] symbol(";;         !(get-metatype Error)")
^  Unify: (273) [user] symbol(";;         !(get-metatype Error)")
   Call: (274) [system] atom(";;         !(get-metatype Error)")
   Fail: (274) [system] atom(";;         !(get-metatype Error)")
^  Fail: (273) [user] symbol(";;         !(get-metatype Error)")
^  Redo: (272) [user] mfix_vars1(";;         !(get-metatype Error)", _246830)
   Call: (273) [system] ";;         !(get-metatype Error)"=_246830
   Exit: (273) [system] ";;         !(get-metatype Error)"=";;         !(get-metatype Error)"
^  Exit: (272) [user] mfix_vars1(";;         !(get-metatype Error)", ";;         !(get-metatype Error)")
   Call: (272) [apply] apply:maplist_([1787, 0], _246832, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1787, 0], [_284828|_284830], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1787, _284828)
^  Unify: (273) [user] mfix_vars1(1787, _284828)
   Call: (274) [system] var(1787)
^  Redo: (273) [user] mfix_vars1(1787, _284828)
^  Unify: (273) [user] mfix_vars1(1787, '$VAR'(_289474))
   Call: (274) [system] atom(1787)
^  Redo: (273) [user] mfix_vars1(1787, _284828)
^  Unify: (273) [user] mfix_vars1(1787, _284828)
   Call: (274) [system] 1787==true
^  Redo: (273) [user] mfix_vars1(1787, _284828)
^  Unify: (273) [user] mfix_vars1(1787, _284828)
   Call: (274) [system] 1787==false
^  Redo: (273) [user] mfix_vars1(1787, _284828)
^  Unify: (273) [user] mfix_vars1(1787, _284828)
   Call: (274) [system] 1787==[_298754, _298760]
^  Redo: (273) [user] mfix_vars1(1787, _284828)
^  Unify: (273) [user] mfix_vars1(1787, _284828)
   Call: (274) [system] is_list(1787)
^  Redo: (273) [user] mfix_vars1(1787, _284828)
^  Unify: (273) [user] mfix_vars1(1787, _284828)
   Call: (274) [system] string(1787)
^  Redo: (273) [user] mfix_vars1(1787, _284828)
^  Unify: (273) [user] mfix_vars1(1787, _284828)
   Call: (274) [system] compound(1787)
^  Redo: (273) [user] mfix_vars1(1787, _284828)
^  Unify: (273) [user] mfix_vars1(1787, _284828)
^  Call: (274) [user] symbol(1787)
^  Unify: (274) [user] symbol(1787)
   Call: (275) [system] atom(1787)
   Fail: (275) [system] atom(1787)
^  Fail: (274) [user] symbol(1787)
^  Redo: (273) [user] mfix_vars1(1787, _284828)
   Call: (274) [system] 1787=_284828
   Exit: (274) [system] 1787=1787
^  Exit: (273) [user] mfix_vars1(1787, 1787)
   Call: (273) [apply] apply:maplist_([0], _284830, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_319154|_319156], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _319154)
^  Unify: (274) [user] mfix_vars1(0, _319154)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _319154)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_323800))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _319154)
^  Unify: (274) [user] mfix_vars1(0, _319154)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _319154)
^  Unify: (274) [user] mfix_vars1(0, _319154)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _319154)
^  Unify: (274) [user] mfix_vars1(0, _319154)
   Call: (275) [system] 0==[_333080, _333086]
^  Redo: (274) [user] mfix_vars1(0, _319154)
^  Unify: (274) [user] mfix_vars1(0, _319154)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _319154)
^  Unify: (274) [user] mfix_vars1(0, _319154)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _319154)
^  Unify: (274) [user] mfix_vars1(0, _319154)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _319154)
^  Unify: (274) [user] mfix_vars1(0, _319154)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _319154)
   Call: (275) [system] 0=_319154
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _319156, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1787, 0], [1787, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         !(get-metatype Error)", 1787, 0], [";;         !(get-metatype Error)", 1787, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(get-metatype Error)", 1787, 0], [";;         !(get-metatype Error)", 1787, 0])
   Call: (270) [system] compound_name_arguments(_213328, '$COMMENT', [";;         !(get-metatype Error)", 1787, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT', [";;         !(get-metatype Error)", 1787, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-metatype Error)", 1787, 0)\=@='$COMMENT'(";;         !(get-metatype Error)", 1787, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _207742)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _369328))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _369328))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _369328))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _369328))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _369328)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _369328)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _374914))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _374914))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _374914)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _374914)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _374914)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-metatype Error)", 1787, 0)\=@='$COMMENT'(";;         !(get-metatype Error)", 1787, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _369328)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _202130))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _202130))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _202130))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _202130))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _202130)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _202130)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _397234))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _397234))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _397234)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _397234)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _397234)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-metatype Error)", 1787, 0)\=@='$COMMENT'(";;         !(get-metatype Error)", 1787, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _202130)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0)))
   Call: (261) [system] '$COMMENT'(";;         !(get-metatype Error)", 1787, 0)\=@='$COMMENT'(";;         !(get-metatype Error)", 1787, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _426012, [], _426014)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _426012, [], _426014)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _426012, [], _426014)
   Call: (258) [system] atom('$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _426012, [], _426014)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _426012, [], _426014)
   Call: (258) [system] compound('$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         !(get-metatype Error)", 1787, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), _435328, _435330)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT', [";;         !(get-metatype Error)", 1787, 0])
^  Call: (258) [user] subst_vars([";;         !(get-metatype Error)", 1787, 0], _437214, [], _426014)
^  Unify: (258) [user] subst_vars([";;         !(get-metatype Error)", 1787, 0], [";;         !(get-metatype Error)", 1787, 0], [], [])
   Call: (259) [system] var([";;         !(get-metatype Error)", 1787, 0])
^  Redo: (258) [user] subst_vars([";;         !(get-metatype Error)", 1787, 0], _437214, [], _426014)
^  Unify: (258) [user] subst_vars([";;         !(get-metatype Error)", 1787, 0], [_440950|_440952], [], _426014)
^  Call: (259) [user] subst_vars(";;         !(get-metatype Error)", _440950, [], _441890)
^  Unify: (259) [user] subst_vars(";;         !(get-metatype Error)", ";;         !(get-metatype Error)", [], [])
   Call: (260) [system] var(";;         !(get-metatype Error)")
^  Redo: (259) [user] subst_vars(";;         !(get-metatype Error)", _440950, [], _441890)
^  Unify: (259) [user] subst_vars(";;         !(get-metatype Error)", _440950, [], _441890)
   Call: (260) [system] atom(";;         !(get-metatype Error)")
^  Redo: (259) [user] subst_vars(";;         !(get-metatype Error)", _440950, [], _441890)
^  Unify: (259) [user] subst_vars(";;         !(get-metatype Error)", _440950, [], _441890)
   Call: (260) [system] compound(";;         !(get-metatype Error)")
^  Redo: (259) [user] subst_vars(";;         !(get-metatype Error)", _440950, [], _441890)
^  Unify: (259) [user] subst_vars(";;         !(get-metatype Error)", ";;         !(get-metatype Error)", [], [])
^  Exit: (259) [user] subst_vars(";;         !(get-metatype Error)", ";;         !(get-metatype Error)", [], [])
^  Call: (259) [user] subst_vars([1787, 0], _440952, [], _426014)
^  Unify: (259) [user] subst_vars([1787, 0], [1787, 0], [], [])
   Call: (260) [system] var([1787, 0])
^  Redo: (259) [user] subst_vars([1787, 0], _440952, [], _426014)
^  Unify: (259) [user] subst_vars([1787, 0], [_456822|_456824], [], _426014)
^  Call: (260) [user] subst_vars(1787, _456822, [], _457762)
^  Unify: (260) [user] subst_vars(1787, 1787, [], [])
   Call: (261) [system] var(1787)
^  Redo: (260) [user] subst_vars(1787, _456822, [], _457762)
^  Unify: (260) [user] subst_vars(1787, _456822, [], _457762)
   Call: (261) [system] atom(1787)
^  Redo: (260) [user] subst_vars(1787, _456822, [], _457762)
^  Unify: (260) [user] subst_vars(1787, _456822, [], _457762)
   Call: (261) [system] compound(1787)
^  Redo: (260) [user] subst_vars(1787, _456822, [], _457762)
^  Unify: (260) [user] subst_vars(1787, 1787, [], [])
^  Exit: (260) [user] subst_vars(1787, 1787, [], [])
^  Call: (260) [user] subst_vars([0], _456824, [], _426014)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _456824, [], _426014)
^  Unify: (260) [user] subst_vars([0], [_472694|_472696], [], _426014)
^  Call: (261) [user] subst_vars(0, _472694, [], _473634)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _472694, [], _473634)
^  Unify: (261) [user] subst_vars(0, _472694, [], _473634)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _472694, [], _473634)
^  Unify: (261) [user] subst_vars(0, _472694, [], _473634)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _472694, [], _473634)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _472696, [], _426014)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _472696, [], _426014)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1787, 0], [1787, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         !(get-metatype Error)", 1787, 0], [";;         !(get-metatype Error)", 1787, 0], [], [])
   Call: (258) [system] compound_name_arguments(_426012, '$COMMENT', [";;         !(get-metatype Error)", 1787, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT', [";;         !(get-metatype Error)", 1787, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         !(get-metatype Error)", 1787, 0), '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), [], [])
   Call: (257) [system] _496052=metta_file_buffer(+, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-metatype Error)", 1787, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1788, 0, 63641, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$stream_position'(63641, 1788, 0, 63675)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _31610))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _31610))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _31610)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _31610)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _31610)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _31610)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _37222))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _37222))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _37222))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _37222))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _37222)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _37222)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _42808))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _42808))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _42808)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _42808)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _42808)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _42808)
   Call: (270) [system] var('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _42808)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$VAR'(_50268))
   Call: (270) [system] atom('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _42808)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _42808)
   Call: (270) [system] '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _42808)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _42808)
   Call: (270) [system] '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _42808)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _42808)
   Call: (270) [system] '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0)==[_59548, _59554]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _42808)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _42808)
   Call: (270) [system] is_list('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _42808)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _42808)
   Call: (270) [system] string('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _42808)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _42808)
   Call: (270) [system] compound('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _69750, _69752)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT', [";;         !(get-type (Error Foo Boo))", 1788, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         !(get-type (Error Foo Boo))", 1788, 0], _73492)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(get-type (Error Foo Boo))", 1788, 0], _73492)
   Call: (271) [apply] apply:maplist_([";;         !(get-type (Error Foo Boo))", 1788, 0], _73492, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         !(get-type (Error Foo Boo))", 1788, 0], [_76310|_76312], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         !(get-type (Error Foo Boo))", _76310)
^  Unify: (272) [user] mfix_vars1(";;         !(get-type (Error Foo Boo))", _76310)
   Call: (273) [system] var(";;         !(get-type (Error Foo Boo))")
^  Redo: (272) [user] mfix_vars1(";;         !(get-type (Error Foo Boo))", _76310)
^  Unify: (272) [user] mfix_vars1(";;         !(get-type (Error Foo Boo))", '$VAR'(_80956))
   Call: (273) [system] atom(";;         !(get-type (Error Foo Boo))")
^  Redo: (272) [user] mfix_vars1(";;         !(get-type (Error Foo Boo))", _76310)
^  Unify: (272) [user] mfix_vars1(";;         !(get-type (Error Foo Boo))", _76310)
   Call: (273) [system] ";;         !(get-type (Error Foo Boo))"==true
^  Redo: (272) [user] mfix_vars1(";;         !(get-type (Error Foo Boo))", _76310)
^  Unify: (272) [user] mfix_vars1(";;         !(get-type (Error Foo Boo))", _76310)
   Call: (273) [system] ";;         !(get-type (Error Foo Boo))"==false
^  Redo: (272) [user] mfix_vars1(";;         !(get-type (Error Foo Boo))", _76310)
^  Unify: (272) [user] mfix_vars1(";;         !(get-type (Error Foo Boo))", _76310)
   Call: (273) [system] ";;         !(get-type (Error Foo Boo))"==[_90236, _90242]
^  Redo: (272) [user] mfix_vars1(";;         !(get-type (Error Foo Boo))", _76310)
^  Unify: (272) [user] mfix_vars1(";;         !(get-type (Error Foo Boo))", _76310)
   Call: (273) [system] is_list(";;         !(get-type (Error Foo Boo))")
^  Redo: (272) [user] mfix_vars1(";;         !(get-type (Error Foo Boo))", _76310)
^  Unify: (272) [user] mfix_vars1(";;         !(get-type (Error Foo Boo))", _76310)
   Call: (273) [system] string(";;         !(get-type (Error Foo Boo))")
   Exit: (273) [system] string(";;         !(get-type (Error Foo Boo))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         !(get-type (Error Foo Boo))", _76310)
^  Unify: (272) [user] mfix_vars1(";;         !(get-type (Error Foo Boo))", _76310)
   Call: (273) [system] compound(";;         !(get-type (Error Foo Boo))")
^  Redo: (272) [user] mfix_vars1(";;         !(get-type (Error Foo Boo))", _76310)
^  Unify: (272) [user] mfix_vars1(";;         !(get-type (Error Foo Boo))", _76310)
^  Call: (273) [user] symbol(";;         !(get-type (Error Foo Boo))")
^  Unify: (273) [user] symbol(";;         !(get-type (Error Foo Boo))")
   Call: (274) [system] atom(";;         !(get-type (Error Foo Boo))")
   Fail: (274) [system] atom(";;         !(get-type (Error Foo Boo))")
^  Fail: (273) [user] symbol(";;         !(get-type (Error Foo Boo))")
^  Redo: (272) [user] mfix_vars1(";;         !(get-type (Error Foo Boo))", _76310)
   Call: (273) [system] ";;         !(get-type (Error Foo Boo))"=_76310
   Exit: (273) [system] ";;         !(get-type (Error Foo Boo))"=";;         !(get-type (Error Foo Boo))"
^  Exit: (272) [user] mfix_vars1(";;         !(get-type (Error Foo Boo))", ";;         !(get-type (Error Foo Boo))")
   Call: (272) [apply] apply:maplist_([1788, 0], _76312, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1788, 0], [_114308|_114310], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1788, _114308)
^  Unify: (273) [user] mfix_vars1(1788, _114308)
   Call: (274) [system] var(1788)
^  Redo: (273) [user] mfix_vars1(1788, _114308)
^  Unify: (273) [user] mfix_vars1(1788, '$VAR'(_118954))
   Call: (274) [system] atom(1788)
^  Redo: (273) [user] mfix_vars1(1788, _114308)
^  Unify: (273) [user] mfix_vars1(1788, _114308)
   Call: (274) [system] 1788==true
^  Redo: (273) [user] mfix_vars1(1788, _114308)
^  Unify: (273) [user] mfix_vars1(1788, _114308)
   Call: (274) [system] 1788==false
^  Redo: (273) [user] mfix_vars1(1788, _114308)
^  Unify: (273) [user] mfix_vars1(1788, _114308)
   Call: (274) [system] 1788==[_128234, _128240]
^  Redo: (273) [user] mfix_vars1(1788, _114308)
^  Unify: (273) [user] mfix_vars1(1788, _114308)
   Call: (274) [system] is_list(1788)
^  Redo: (273) [user] mfix_vars1(1788, _114308)
^  Unify: (273) [user] mfix_vars1(1788, _114308)
   Call: (274) [system] string(1788)
^  Redo: (273) [user] mfix_vars1(1788, _114308)
^  Unify: (273) [user] mfix_vars1(1788, _114308)
   Call: (274) [system] compound(1788)
^  Redo: (273) [user] mfix_vars1(1788, _114308)
^  Unify: (273) [user] mfix_vars1(1788, _114308)
^  Call: (274) [user] symbol(1788)
^  Unify: (274) [user] symbol(1788)
   Call: (275) [system] atom(1788)
   Fail: (275) [system] atom(1788)
^  Fail: (274) [user] symbol(1788)
^  Redo: (273) [user] mfix_vars1(1788, _114308)
   Call: (274) [system] 1788=_114308
   Exit: (274) [system] 1788=1788
^  Exit: (273) [user] mfix_vars1(1788, 1788)
   Call: (273) [apply] apply:maplist_([0], _114310, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_148634|_148636], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _148634)
^  Unify: (274) [user] mfix_vars1(0, _148634)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _148634)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_153280))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _148634)
^  Unify: (274) [user] mfix_vars1(0, _148634)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _148634)
^  Unify: (274) [user] mfix_vars1(0, _148634)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _148634)
^  Unify: (274) [user] mfix_vars1(0, _148634)
   Call: (275) [system] 0==[_162560, _162566]
^  Redo: (274) [user] mfix_vars1(0, _148634)
^  Unify: (274) [user] mfix_vars1(0, _148634)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _148634)
^  Unify: (274) [user] mfix_vars1(0, _148634)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _148634)
^  Unify: (274) [user] mfix_vars1(0, _148634)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _148634)
^  Unify: (274) [user] mfix_vars1(0, _148634)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _148634)
   Call: (275) [system] 0=_148634
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _148636, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1788, 0], [1788, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         !(get-type (Error Foo Boo))", 1788, 0], [";;         !(get-type (Error Foo Boo))", 1788, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(get-type (Error Foo Boo))", 1788, 0], [";;         !(get-type (Error Foo Boo))", 1788, 0])
   Call: (270) [system] compound_name_arguments(_42808, '$COMMENT', [";;         !(get-type (Error Foo Boo))", 1788, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT', [";;         !(get-type (Error Foo Boo))", 1788, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0)\=@='$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _37222)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _198808))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _198808))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _198808))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _198808))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _198808)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _198808)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _204394))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _204394))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _204394)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _204394)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _204394)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0)\=@='$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _198808)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _31610))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _31610))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _31610))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _31610))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _31610)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _31610)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _226714))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _226714))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _226714)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _226714)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _226714)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0)\=@='$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _31610)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0)))
   Call: (261) [system] '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0)\=@='$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _255492, [], _255494)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _255492, [], _255494)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _255492, [], _255494)
   Call: (258) [system] atom('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _255492, [], _255494)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _255492, [], _255494)
   Call: (258) [system] compound('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), _264808, _264810)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT', [";;         !(get-type (Error Foo Boo))", 1788, 0])
^  Call: (258) [user] subst_vars([";;         !(get-type (Error Foo Boo))", 1788, 0], _266694, [], _255494)
^  Unify: (258) [user] subst_vars([";;         !(get-type (Error Foo Boo))", 1788, 0], [";;         !(get-type (Error Foo Boo))", 1788, 0], [], [])
   Call: (259) [system] var([";;         !(get-type (Error Foo Boo))", 1788, 0])
^  Redo: (258) [user] subst_vars([";;         !(get-type (Error Foo Boo))", 1788, 0], _266694, [], _255494)
^  Unify: (258) [user] subst_vars([";;         !(get-type (Error Foo Boo))", 1788, 0], [_270430|_270432], [], _255494)
^  Call: (259) [user] subst_vars(";;         !(get-type (Error Foo Boo))", _270430, [], _271370)
^  Unify: (259) [user] subst_vars(";;         !(get-type (Error Foo Boo))", ";;         !(get-type (Error Foo Boo))", [], [])
   Call: (260) [system] var(";;         !(get-type (Error Foo Boo))")
^  Redo: (259) [user] subst_vars(";;         !(get-type (Error Foo Boo))", _270430, [], _271370)
^  Unify: (259) [user] subst_vars(";;         !(get-type (Error Foo Boo))", _270430, [], _271370)
   Call: (260) [system] atom(";;         !(get-type (Error Foo Boo))")
^  Redo: (259) [user] subst_vars(";;         !(get-type (Error Foo Boo))", _270430, [], _271370)
^  Unify: (259) [user] subst_vars(";;         !(get-type (Error Foo Boo))", _270430, [], _271370)
   Call: (260) [system] compound(";;         !(get-type (Error Foo Boo))")
^  Redo: (259) [user] subst_vars(";;         !(get-type (Error Foo Boo))", _270430, [], _271370)
^  Unify: (259) [user] subst_vars(";;         !(get-type (Error Foo Boo))", ";;         !(get-type (Error Foo Boo))", [], [])
^  Exit: (259) [user] subst_vars(";;         !(get-type (Error Foo Boo))", ";;         !(get-type (Error Foo Boo))", [], [])
^  Call: (259) [user] subst_vars([1788, 0], _270432, [], _255494)
^  Unify: (259) [user] subst_vars([1788, 0], [1788, 0], [], [])
   Call: (260) [system] var([1788, 0])
^  Redo: (259) [user] subst_vars([1788, 0], _270432, [], _255494)
^  Unify: (259) [user] subst_vars([1788, 0], [_286302|_286304], [], _255494)
^  Call: (260) [user] subst_vars(1788, _286302, [], _287242)
^  Unify: (260) [user] subst_vars(1788, 1788, [], [])
   Call: (261) [system] var(1788)
^  Redo: (260) [user] subst_vars(1788, _286302, [], _287242)
^  Unify: (260) [user] subst_vars(1788, _286302, [], _287242)
   Call: (261) [system] atom(1788)
^  Redo: (260) [user] subst_vars(1788, _286302, [], _287242)
^  Unify: (260) [user] subst_vars(1788, _286302, [], _287242)
   Call: (261) [system] compound(1788)
^  Redo: (260) [user] subst_vars(1788, _286302, [], _287242)
^  Unify: (260) [user] subst_vars(1788, 1788, [], [])
^  Exit: (260) [user] subst_vars(1788, 1788, [], [])
^  Call: (260) [user] subst_vars([0], _286304, [], _255494)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _286304, [], _255494)
^  Unify: (260) [user] subst_vars([0], [_302174|_302176], [], _255494)
^  Call: (261) [user] subst_vars(0, _302174, [], _303114)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _302174, [], _303114)
^  Unify: (261) [user] subst_vars(0, _302174, [], _303114)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _302174, [], _303114)
^  Unify: (261) [user] subst_vars(0, _302174, [], _303114)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _302174, [], _303114)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _302176, [], _255494)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _302176, [], _255494)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1788, 0], [1788, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         !(get-type (Error Foo Boo))", 1788, 0], [";;         !(get-type (Error Foo Boo))", 1788, 0], [], [])
   Call: (258) [system] compound_name_arguments(_255492, '$COMMENT', [";;         !(get-type (Error Foo Boo))", 1788, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT', [";;         !(get-type (Error Foo Boo))", 1788, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), [], [])
   Call: (257) [system] _325532=metta_file_buffer(+, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(get-type (Error Foo Boo))", 1788, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1789, 0, 63680, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$stream_position'(63680, 1789, 0, 63714)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _378256))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _378256))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _378256)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _378256)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _378256)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _378256)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _383868))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _383868))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _383868))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _383868))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _383868)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _383868)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _389454))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _389454))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _389454)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _389454)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _389454)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _389454)
   Call: (270) [system] var('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _389454)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$VAR'(_396914))
   Call: (270) [system] atom('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _389454)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _389454)
   Call: (270) [system] '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _389454)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _389454)
   Call: (270) [system] '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _389454)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _389454)
   Call: (270) [system] '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0)==[_406194, _406200]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _389454)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _389454)
   Call: (270) [system] is_list('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _389454)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _389454)
   Call: (270) [system] string('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _389454)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _389454)
   Call: (270) [system] compound('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _416396, _416398)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT', [";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0], _420138)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0], _420138)
   Call: (271) [apply] apply:maplist_([";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0], _420138, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0], [_422956|_422958], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         !(Error (+ 1 2) (+ 1 +))", _422956)
^  Unify: (272) [user] mfix_vars1(";;         !(Error (+ 1 2) (+ 1 +))", _422956)
   Call: (273) [system] var(";;         !(Error (+ 1 2) (+ 1 +))")
^  Redo: (272) [user] mfix_vars1(";;         !(Error (+ 1 2) (+ 1 +))", _422956)
^  Unify: (272) [user] mfix_vars1(";;         !(Error (+ 1 2) (+ 1 +))", '$VAR'(_427602))
   Call: (273) [system] atom(";;         !(Error (+ 1 2) (+ 1 +))")
^  Redo: (272) [user] mfix_vars1(";;         !(Error (+ 1 2) (+ 1 +))", _422956)
^  Unify: (272) [user] mfix_vars1(";;         !(Error (+ 1 2) (+ 1 +))", _422956)
   Call: (273) [system] ";;         !(Error (+ 1 2) (+ 1 +))"==true
^  Redo: (272) [user] mfix_vars1(";;         !(Error (+ 1 2) (+ 1 +))", _422956)
^  Unify: (272) [user] mfix_vars1(";;         !(Error (+ 1 2) (+ 1 +))", _422956)
   Call: (273) [system] ";;         !(Error (+ 1 2) (+ 1 +))"==false
^  Redo: (272) [user] mfix_vars1(";;         !(Error (+ 1 2) (+ 1 +))", _422956)
^  Unify: (272) [user] mfix_vars1(";;         !(Error (+ 1 2) (+ 1 +))", _422956)
   Call: (273) [system] ";;         !(Error (+ 1 2) (+ 1 +))"==[_436882, _436888]
^  Redo: (272) [user] mfix_vars1(";;         !(Error (+ 1 2) (+ 1 +))", _422956)
^  Unify: (272) [user] mfix_vars1(";;         !(Error (+ 1 2) (+ 1 +))", _422956)
   Call: (273) [system] is_list(";;         !(Error (+ 1 2) (+ 1 +))")
^  Redo: (272) [user] mfix_vars1(";;         !(Error (+ 1 2) (+ 1 +))", _422956)
^  Unify: (272) [user] mfix_vars1(";;         !(Error (+ 1 2) (+ 1 +))", _422956)
   Call: (273) [system] string(";;         !(Error (+ 1 2) (+ 1 +))")
   Exit: (273) [system] string(";;         !(Error (+ 1 2) (+ 1 +))")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         !(Error (+ 1 2) (+ 1 +))", _422956)
^  Unify: (272) [user] mfix_vars1(";;         !(Error (+ 1 2) (+ 1 +))", _422956)
   Call: (273) [system] compound(";;         !(Error (+ 1 2) (+ 1 +))")
^  Redo: (272) [user] mfix_vars1(";;         !(Error (+ 1 2) (+ 1 +))", _422956)
^  Unify: (272) [user] mfix_vars1(";;         !(Error (+ 1 2) (+ 1 +))", _422956)
^  Call: (273) [user] symbol(";;         !(Error (+ 1 2) (+ 1 +))")
^  Unify: (273) [user] symbol(";;         !(Error (+ 1 2) (+ 1 +))")
   Call: (274) [system] atom(";;         !(Error (+ 1 2) (+ 1 +))")
   Fail: (274) [system] atom(";;         !(Error (+ 1 2) (+ 1 +))")
^  Fail: (273) [user] symbol(";;         !(Error (+ 1 2) (+ 1 +))")
^  Redo: (272) [user] mfix_vars1(";;         !(Error (+ 1 2) (+ 1 +))", _422956)
   Call: (273) [system] ";;         !(Error (+ 1 2) (+ 1 +))"=_422956
   Exit: (273) [system] ";;         !(Error (+ 1 2) (+ 1 +))"=";;         !(Error (+ 1 2) (+ 1 +))"
^  Exit: (272) [user] mfix_vars1(";;         !(Error (+ 1 2) (+ 1 +))", ";;         !(Error (+ 1 2) (+ 1 +))")
   Call: (272) [apply] apply:maplist_([1789, 0], _422958, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1789, 0], [_460954|_460956], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1789, _460954)
^  Unify: (273) [user] mfix_vars1(1789, _460954)
   Call: (274) [system] var(1789)
^  Redo: (273) [user] mfix_vars1(1789, _460954)
^  Unify: (273) [user] mfix_vars1(1789, '$VAR'(_465600))
   Call: (274) [system] atom(1789)
^  Redo: (273) [user] mfix_vars1(1789, _460954)
^  Unify: (273) [user] mfix_vars1(1789, _460954)
   Call: (274) [system] 1789==true
^  Redo: (273) [user] mfix_vars1(1789, _460954)
^  Unify: (273) [user] mfix_vars1(1789, _460954)
   Call: (274) [system] 1789==false
^  Redo: (273) [user] mfix_vars1(1789, _460954)
^  Unify: (273) [user] mfix_vars1(1789, _460954)
   Call: (274) [system] 1789==[_474880, _474886]
^  Redo: (273) [user] mfix_vars1(1789, _460954)
^  Unify: (273) [user] mfix_vars1(1789, _460954)
   Call: (274) [system] is_list(1789)
^  Redo: (273) [user] mfix_vars1(1789, _460954)
^  Unify: (273) [user] mfix_vars1(1789, _460954)
   Call: (274) [system] string(1789)
^  Redo: (273) [user] mfix_vars1(1789, _460954)
^  Unify: (273) [user] mfix_vars1(1789, _460954)
   Call: (274) [system] compound(1789)
^  Redo: (273) [user] mfix_vars1(1789, _460954)
^  Unify: (273) [user] mfix_vars1(1789, _460954)
^  Call: (274) [user] symbol(1789)
^  Unify: (274) [user] symbol(1789)
   Call: (275) [system] atom(1789)
   Fail: (275) [system] atom(1789)
^  Fail: (274) [user] symbol(1789)
^  Redo: (273) [user] mfix_vars1(1789, _460954)
   Call: (274) [system] 1789=_460954
   Exit: (274) [system] 1789=1789
^  Exit: (273) [user] mfix_vars1(1789, 1789)
   Call: (273) [apply] apply:maplist_([0], _460956, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_495280|_495282], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _495280)
^  Unify: (274) [user] mfix_vars1(0, _495280)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _495280)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_499926))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _495280)
^  Unify: (274) [user] mfix_vars1(0, _495280)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _495280)
^  Unify: (274) [user] mfix_vars1(0, _495280)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _495280)
^  Unify: (274) [user] mfix_vars1(0, _495280)
   Call: (275) [system] 0==[_509206, _509212]
^  Redo: (274) [user] mfix_vars1(0, _495280)
^  Unify: (274) [user] mfix_vars1(0, _495280)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _495280)
^  Unify: (274) [user] mfix_vars1(0, _495280)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _495280)
^  Unify: (274) [user] mfix_vars1(0, _495280)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _495280)
^  Unify: (274) [user] mfix_vars1(0, _495280)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6042)
   Call: (275) [system] 0=_6042
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6044, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1789, 0], [1789, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0], [";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0], [";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0])
   Call: (270) [system] compound_name_arguments(_5984, '$COMMENT', [";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT', [";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0)\=@='$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _5970)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _27414))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _27414))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _27414))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _27414))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _27414)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _27414)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _33000))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _33000))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _33000)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _33000)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _33000)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0)\=@='$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _27414)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _55320))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _55320))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _55320)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _55320)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _55320)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0)))
   Call: (267) [system] '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0)\=@='$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0)))
   Call: (261) [system] '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0)\=@='$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _84098, [], _84100)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _84098, [], _84100)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _84098, [], _84100)
   Call: (258) [system] atom('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _84098, [], _84100)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _84098, [], _84100)
   Call: (258) [system] compound('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), _93414, _93416)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT', [";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0])
^  Call: (258) [user] subst_vars([";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0], _95300, [], _84100)
^  Unify: (258) [user] subst_vars([";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0], [";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0], [], [])
   Call: (259) [system] var([";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0])
^  Redo: (258) [user] subst_vars([";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0], _95300, [], _84100)
^  Unify: (258) [user] subst_vars([";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0], [_99036|_99038], [], _84100)
^  Call: (259) [user] subst_vars(";;         !(Error (+ 1 2) (+ 1 +))", _99036, [], _99976)
^  Unify: (259) [user] subst_vars(";;         !(Error (+ 1 2) (+ 1 +))", ";;         !(Error (+ 1 2) (+ 1 +))", [], [])
   Call: (260) [system] var(";;         !(Error (+ 1 2) (+ 1 +))")
^  Redo: (259) [user] subst_vars(";;         !(Error (+ 1 2) (+ 1 +))", _99036, [], _99976)
^  Unify: (259) [user] subst_vars(";;         !(Error (+ 1 2) (+ 1 +))", _99036, [], _99976)
   Call: (260) [system] atom(";;         !(Error (+ 1 2) (+ 1 +))")
^  Redo: (259) [user] subst_vars(";;         !(Error (+ 1 2) (+ 1 +))", _99036, [], _99976)
^  Unify: (259) [user] subst_vars(";;         !(Error (+ 1 2) (+ 1 +))", _99036, [], _99976)
   Call: (260) [system] compound(";;         !(Error (+ 1 2) (+ 1 +))")
^  Redo: (259) [user] subst_vars(";;         !(Error (+ 1 2) (+ 1 +))", _99036, [], _99976)
^  Unify: (259) [user] subst_vars(";;         !(Error (+ 1 2) (+ 1 +))", ";;         !(Error (+ 1 2) (+ 1 +))", [], [])
^  Exit: (259) [user] subst_vars(";;         !(Error (+ 1 2) (+ 1 +))", ";;         !(Error (+ 1 2) (+ 1 +))", [], [])
^  Call: (259) [user] subst_vars([1789, 0], _99038, [], _84100)
^  Unify: (259) [user] subst_vars([1789, 0], [1789, 0], [], [])
   Call: (260) [system] var([1789, 0])
^  Redo: (259) [user] subst_vars([1789, 0], _99038, [], _84100)
^  Unify: (259) [user] subst_vars([1789, 0], [_114908|_114910], [], _84100)
^  Call: (260) [user] subst_vars(1789, _114908, [], _115848)
^  Unify: (260) [user] subst_vars(1789, 1789, [], [])
   Call: (261) [system] var(1789)
^  Redo: (260) [user] subst_vars(1789, _114908, [], _115848)
^  Unify: (260) [user] subst_vars(1789, _114908, [], _115848)
   Call: (261) [system] atom(1789)
^  Redo: (260) [user] subst_vars(1789, _114908, [], _115848)
^  Unify: (260) [user] subst_vars(1789, _114908, [], _115848)
   Call: (261) [system] compound(1789)
^  Redo: (260) [user] subst_vars(1789, _114908, [], _115848)
^  Unify: (260) [user] subst_vars(1789, 1789, [], [])
^  Exit: (260) [user] subst_vars(1789, 1789, [], [])
^  Call: (260) [user] subst_vars([0], _114910, [], _84100)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _114910, [], _84100)
^  Unify: (260) [user] subst_vars([0], [_130780|_130782], [], _84100)
^  Call: (261) [user] subst_vars(0, _130780, [], _131720)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _130780, [], _131720)
^  Unify: (261) [user] subst_vars(0, _130780, [], _131720)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _130780, [], _131720)
^  Unify: (261) [user] subst_vars(0, _130780, [], _131720)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _130780, [], _131720)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _130782, [], _84100)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _130782, [], _84100)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1789, 0], [1789, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0], [";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0], [], [])
   Call: (258) [system] compound_name_arguments(_84098, '$COMMENT', [";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT', [";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), [], [])
   Call: (257) [system] _154138=metta_file_buffer(+, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         !(Error (+ 1 2) (+ 1 +))", 1789, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1790, 0, 63716, '$COMMENT'(";;     \"#);", 1790, 0), '$stream_position'(63716, 1790, 0, 63750)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1790, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1790, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1790, 0), _206856))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1790, 0), _206856))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1790, 0), _206856)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     \"#);", 1790, 0), _206856)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     \"#);", 1790, 0), _206856)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     \"#);", 1790, 0), _206856)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1790, 0), _212468))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1790, 0), _212468))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1790, 0), _212468))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1790, 0), _212468))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1790, 0), _212468)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1790, 0), _212468)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     \"#);", 1790, 0), _218054))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     \"#);", 1790, 0), _218054))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     \"#);", 1790, 0), _218054)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     \"#);", 1790, 0), _218054)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1790, 0), _218054)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1790, 0), _218054)
   Call: (270) [system] var('$COMMENT'(";;     \"#);", 1790, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1790, 0), _218054)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1790, 0), '$VAR'(_225514))
   Call: (270) [system] atom('$COMMENT'(";;     \"#);", 1790, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1790, 0), _218054)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1790, 0), _218054)
   Call: (270) [system] '$COMMENT'(";;     \"#);", 1790, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1790, 0), _218054)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1790, 0), _218054)
   Call: (270) [system] '$COMMENT'(";;     \"#);", 1790, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1790, 0), _218054)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1790, 0), _218054)
   Call: (270) [system] '$COMMENT'(";;     \"#);", 1790, 0)==[_234794, _234800]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1790, 0), _218054)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1790, 0), _218054)
   Call: (270) [system] is_list('$COMMENT'(";;     \"#);", 1790, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1790, 0), _218054)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1790, 0), _218054)
   Call: (270) [system] string('$COMMENT'(";;     \"#);", 1790, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1790, 0), _218054)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1790, 0), _218054)
   Call: (270) [system] compound('$COMMENT'(";;     \"#);", 1790, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     \"#);", 1790, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1790, 0), _244996, _244998)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT', [";;     \"#);", 1790, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     \"#);", 1790, 0], _248738)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     \"#);", 1790, 0], _248738)
   Call: (271) [apply] apply:maplist_([";;     \"#);", 1790, 0], _248738, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     \"#);", 1790, 0], [_251556|_251558], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     \"#);", _251556)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _251556)
   Call: (273) [system] var(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _251556)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", '$VAR'(_256202))
   Call: (273) [system] atom(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _251556)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _251556)
   Call: (273) [system] ";;     \"#);"==true
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _251556)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _251556)
   Call: (273) [system] ";;     \"#);"==false
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _251556)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _251556)
   Call: (273) [system] ";;     \"#);"==[_265482, _265488]
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _251556)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _251556)
   Call: (273) [system] is_list(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _251556)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _251556)
   Call: (273) [system] string(";;     \"#);")
   Exit: (273) [system] string(";;     \"#);")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _251556)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _251556)
   Call: (273) [system] compound(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _251556)
^  Unify: (272) [user] mfix_vars1(";;     \"#);", _251556)
^  Call: (273) [user] symbol(";;     \"#);")
^  Unify: (273) [user] symbol(";;     \"#);")
   Call: (274) [system] atom(";;     \"#);")
   Fail: (274) [system] atom(";;     \"#);")
^  Fail: (273) [user] symbol(";;     \"#);")
^  Redo: (272) [user] mfix_vars1(";;     \"#);", _251556)
   Call: (273) [system] ";;     \"#);"=_251556
   Exit: (273) [system] ";;     \"#);"=";;     \"#);"
^  Exit: (272) [user] mfix_vars1(";;     \"#);", ";;     \"#);")
   Call: (272) [apply] apply:maplist_([1790, 0], _251558, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1790, 0], [_289554|_289556], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1790, _289554)
^  Unify: (273) [user] mfix_vars1(1790, _289554)
   Call: (274) [system] var(1790)
^  Redo: (273) [user] mfix_vars1(1790, _289554)
^  Unify: (273) [user] mfix_vars1(1790, '$VAR'(_294200))
   Call: (274) [system] atom(1790)
^  Redo: (273) [user] mfix_vars1(1790, _289554)
^  Unify: (273) [user] mfix_vars1(1790, _289554)
   Call: (274) [system] 1790==true
^  Redo: (273) [user] mfix_vars1(1790, _289554)
^  Unify: (273) [user] mfix_vars1(1790, _289554)
   Call: (274) [system] 1790==false
^  Redo: (273) [user] mfix_vars1(1790, _289554)
^  Unify: (273) [user] mfix_vars1(1790, _289554)
   Call: (274) [system] 1790==[_303480, _303486]
^  Redo: (273) [user] mfix_vars1(1790, _289554)
^  Unify: (273) [user] mfix_vars1(1790, _289554)
   Call: (274) [system] is_list(1790)
^  Redo: (273) [user] mfix_vars1(1790, _289554)
^  Unify: (273) [user] mfix_vars1(1790, _289554)
   Call: (274) [system] string(1790)
^  Redo: (273) [user] mfix_vars1(1790, _289554)
^  Unify: (273) [user] mfix_vars1(1790, _289554)
   Call: (274) [system] compound(1790)
^  Redo: (273) [user] mfix_vars1(1790, _289554)
^  Unify: (273) [user] mfix_vars1(1790, _289554)
^  Call: (274) [user] symbol(1790)
^  Unify: (274) [user] symbol(1790)
   Call: (275) [system] atom(1790)
   Fail: (275) [system] atom(1790)
^  Fail: (274) [user] symbol(1790)
^  Redo: (273) [user] mfix_vars1(1790, _289554)
   Call: (274) [system] 1790=_289554
   Exit: (274) [system] 1790=1790
^  Exit: (273) [user] mfix_vars1(1790, 1790)
   Call: (273) [apply] apply:maplist_([0], _289556, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_323880|_323882], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _323880)
^  Unify: (274) [user] mfix_vars1(0, _323880)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _323880)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_328526))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _323880)
^  Unify: (274) [user] mfix_vars1(0, _323880)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _323880)
^  Unify: (274) [user] mfix_vars1(0, _323880)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _323880)
^  Unify: (274) [user] mfix_vars1(0, _323880)
   Call: (275) [system] 0==[_337806, _337812]
^  Redo: (274) [user] mfix_vars1(0, _323880)
^  Unify: (274) [user] mfix_vars1(0, _323880)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _323880)
^  Unify: (274) [user] mfix_vars1(0, _323880)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _323880)
^  Unify: (274) [user] mfix_vars1(0, _323880)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _323880)
^  Unify: (274) [user] mfix_vars1(0, _323880)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _323880)
   Call: (275) [system] 0=_323880
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _323882, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1790, 0], [1790, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     \"#);", 1790, 0], [";;     \"#);", 1790, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     \"#);", 1790, 0], [";;     \"#);", 1790, 0])
   Call: (270) [system] compound_name_arguments(_218054, '$COMMENT', [";;     \"#);", 1790, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT', [";;     \"#);", 1790, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0)))
   Call: (267) [system] '$COMMENT'(";;     \"#);", 1790, 0)\=@='$COMMENT'(";;     \"#);", 1790, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1790, 0), _212468)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     \"#);", 1790, 0), _374054))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1790, 0), _374054))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1790, 0), _374054))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1790, 0), _374054))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1790, 0), _374054)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1790, 0), _374054)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     \"#);", 1790, 0), _379640))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     \"#);", 1790, 0), _379640))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     \"#);", 1790, 0), _379640)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     \"#);", 1790, 0), _379640)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     \"#);", 1790, 0), _379640)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0)))
   Call: (267) [system] '$COMMENT'(";;     \"#);", 1790, 0)\=@='$COMMENT'(";;     \"#);", 1790, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1790, 0), _374054)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     \"#);", 1790, 0), _206856))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1790, 0), _206856))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1790, 0), _206856))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1790, 0), _206856))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1790, 0), _206856)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1790, 0), _206856)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     \"#);", 1790, 0), _401960))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     \"#);", 1790, 0), _401960))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     \"#);", 1790, 0), _401960)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     \"#);", 1790, 0), _401960)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     \"#);", 1790, 0), _401960)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0)))
   Call: (267) [system] '$COMMENT'(";;     \"#);", 1790, 0)\=@='$COMMENT'(";;     \"#);", 1790, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1790, 0), _206856)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0)))
   Call: (261) [system] '$COMMENT'(";;     \"#);", 1790, 0)\=@='$COMMENT'(";;     \"#);", 1790, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1790, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1790, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1790, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1790, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1790, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1790, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     \"#);", 1790, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1790, 0), _430738, [], _430740)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     \"#);", 1790, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1790, 0), _430738, [], _430740)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1790, 0), _430738, [], _430740)
   Call: (258) [system] atom('$COMMENT'(";;     \"#);", 1790, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1790, 0), _430738, [], _430740)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1790, 0), _430738, [], _430740)
   Call: (258) [system] compound('$COMMENT'(";;     \"#);", 1790, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     \"#);", 1790, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1790, 0), _440054, _440056)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT', [";;     \"#);", 1790, 0])
^  Call: (258) [user] subst_vars([";;     \"#);", 1790, 0], _441940, [], _430740)
^  Unify: (258) [user] subst_vars([";;     \"#);", 1790, 0], [";;     \"#);", 1790, 0], [], [])
   Call: (259) [system] var([";;     \"#);", 1790, 0])
^  Redo: (258) [user] subst_vars([";;     \"#);", 1790, 0], _441940, [], _430740)
^  Unify: (258) [user] subst_vars([";;     \"#);", 1790, 0], [_445676|_445678], [], _430740)
^  Call: (259) [user] subst_vars(";;     \"#);", _445676, [], _446616)
^  Unify: (259) [user] subst_vars(";;     \"#);", ";;     \"#);", [], [])
   Call: (260) [system] var(";;     \"#);")
^  Redo: (259) [user] subst_vars(";;     \"#);", _445676, [], _446616)
^  Unify: (259) [user] subst_vars(";;     \"#);", _445676, [], _446616)
   Call: (260) [system] atom(";;     \"#);")
^  Redo: (259) [user] subst_vars(";;     \"#);", _445676, [], _446616)
^  Unify: (259) [user] subst_vars(";;     \"#);", _445676, [], _446616)
   Call: (260) [system] compound(";;     \"#);")
^  Redo: (259) [user] subst_vars(";;     \"#);", _445676, [], _446616)
^  Unify: (259) [user] subst_vars(";;     \"#);", ";;     \"#);", [], [])
^  Exit: (259) [user] subst_vars(";;     \"#);", ";;     \"#);", [], [])
^  Call: (259) [user] subst_vars([1790, 0], _445678, [], _430740)
^  Unify: (259) [user] subst_vars([1790, 0], [1790, 0], [], [])
   Call: (260) [system] var([1790, 0])
^  Redo: (259) [user] subst_vars([1790, 0], _445678, [], _430740)
^  Unify: (259) [user] subst_vars([1790, 0], [_461548|_461550], [], _430740)
^  Call: (260) [user] subst_vars(1790, _461548, [], _462488)
^  Unify: (260) [user] subst_vars(1790, 1790, [], [])
   Call: (261) [system] var(1790)
^  Redo: (260) [user] subst_vars(1790, _461548, [], _462488)
^  Unify: (260) [user] subst_vars(1790, _461548, [], _462488)
   Call: (261) [system] atom(1790)
^  Redo: (260) [user] subst_vars(1790, _461548, [], _462488)
^  Unify: (260) [user] subst_vars(1790, _461548, [], _462488)
   Call: (261) [system] compound(1790)
^  Redo: (260) [user] subst_vars(1790, _461548, [], _462488)
^  Unify: (260) [user] subst_vars(1790, 1790, [], [])
^  Exit: (260) [user] subst_vars(1790, 1790, [], [])
^  Call: (260) [user] subst_vars([0], _461550, [], _430740)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _461550, [], _430740)
^  Unify: (260) [user] subst_vars([0], [_477420|_477422], [], _430740)
^  Call: (261) [user] subst_vars(0, _477420, [], _478360)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _477420, [], _478360)
^  Unify: (261) [user] subst_vars(0, _477420, [], _478360)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _477420, [], _478360)
^  Unify: (261) [user] subst_vars(0, _477420, [], _478360)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _477420, [], _478360)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _477422, [], _430740)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _477422, [], _430740)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1790, 0], [1790, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     \"#);", 1790, 0], [";;     \"#);", 1790, 0], [], [])
   Call: (258) [system] compound_name_arguments(_430738, '$COMMENT', [";;     \"#);", 1790, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT', [";;     \"#);", 1790, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     \"#);", 1790, 0), '$COMMENT'(";;     \"#);", 1790, 0), [], [])
   Call: (257) [system] _500778=metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1790, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1790, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1790, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1790, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1790, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1790, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1790, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1790, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     \"#);", 1790, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1791, 0, 63728, '$COMMENT'(";;", 1791, 0), '$stream_position'(63728, 1791, 0, 63762)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1791, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1791, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;", 1791, 0), _36420))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1791, 0), _36420))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;", 1791, 0), _36420)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1791, 0), _36420)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;", 1791, 0), _36420)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;", 1791, 0), _36420)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;", 1791, 0), _42032))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1791, 0), _42032))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1791, 0), _42032))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1791, 0), _42032))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1791, 0), _42032)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1791, 0), _42032)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;", 1791, 0), _47618))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1791, 0), _47618))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;", 1791, 0), _47618)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1791, 0), _47618)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;", 1791, 0), _47618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1791, 0), _47618)
   Call: (270) [system] var('$COMMENT'(";;", 1791, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1791, 0), _47618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1791, 0), '$VAR'(_55078))
   Call: (270) [system] atom('$COMMENT'(";;", 1791, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1791, 0), _47618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1791, 0), _47618)
   Call: (270) [system] '$COMMENT'(";;", 1791, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1791, 0), _47618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1791, 0), _47618)
   Call: (270) [system] '$COMMENT'(";;", 1791, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1791, 0), _47618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1791, 0), _47618)
   Call: (270) [system] '$COMMENT'(";;", 1791, 0)==[_64358, _64364]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1791, 0), _47618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1791, 0), _47618)
   Call: (270) [system] is_list('$COMMENT'(";;", 1791, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1791, 0), _47618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1791, 0), _47618)
   Call: (270) [system] string('$COMMENT'(";;", 1791, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;", 1791, 0), _47618)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;", 1791, 0), _47618)
   Call: (270) [system] compound('$COMMENT'(";;", 1791, 0))
   Exit: (270) [system] compound('$COMMENT'(";;", 1791, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;", 1791, 0), _74560, _74562)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1791, 0), '$COMMENT', [";;", 1791, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;", 1791, 0], _78302)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1791, 0], _78302)
   Call: (271) [apply] apply:maplist_([";;", 1791, 0], _78302, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;", 1791, 0], [_81120|_81122], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;", _81120)
^  Unify: (272) [user] mfix_vars1(";;", _81120)
   Call: (273) [system] var(";;")
^  Redo: (272) [user] mfix_vars1(";;", _81120)
^  Unify: (272) [user] mfix_vars1(";;", '$VAR'(_85766))
   Call: (273) [system] atom(";;")
^  Redo: (272) [user] mfix_vars1(";;", _81120)
^  Unify: (272) [user] mfix_vars1(";;", _81120)
   Call: (273) [system] ";;"==true
^  Redo: (272) [user] mfix_vars1(";;", _81120)
^  Unify: (272) [user] mfix_vars1(";;", _81120)
   Call: (273) [system] ";;"==false
^  Redo: (272) [user] mfix_vars1(";;", _81120)
^  Unify: (272) [user] mfix_vars1(";;", _81120)
   Call: (273) [system] ";;"==[_95046, _95052]
^  Redo: (272) [user] mfix_vars1(";;", _81120)
^  Unify: (272) [user] mfix_vars1(";;", _81120)
   Call: (273) [system] is_list(";;")
^  Redo: (272) [user] mfix_vars1(";;", _81120)
^  Unify: (272) [user] mfix_vars1(";;", _81120)
   Call: (273) [system] string(";;")
   Exit: (273) [system] string(";;")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;", _81120)
^  Unify: (272) [user] mfix_vars1(";;", _81120)
   Call: (273) [system] compound(";;")
^  Redo: (272) [user] mfix_vars1(";;", _81120)
^  Unify: (272) [user] mfix_vars1(";;", _81120)
^  Call: (273) [user] symbol(";;")
^  Unify: (273) [user] symbol(";;")
   Call: (274) [system] atom(";;")
   Fail: (274) [system] atom(";;")
^  Fail: (273) [user] symbol(";;")
^  Redo: (272) [user] mfix_vars1(";;", _81120)
   Call: (273) [system] ";;"=_81120
   Exit: (273) [system] ";;"=";;"
^  Exit: (272) [user] mfix_vars1(";;", ";;")
   Call: (272) [apply] apply:maplist_([1791, 0], _81122, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1791, 0], [_119118|_119120], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1791, _119118)
^  Unify: (273) [user] mfix_vars1(1791, _119118)
   Call: (274) [system] var(1791)
^  Redo: (273) [user] mfix_vars1(1791, _119118)
^  Unify: (273) [user] mfix_vars1(1791, '$VAR'(_123764))
   Call: (274) [system] atom(1791)
^  Redo: (273) [user] mfix_vars1(1791, _119118)
^  Unify: (273) [user] mfix_vars1(1791, _119118)
   Call: (274) [system] 1791==true
^  Redo: (273) [user] mfix_vars1(1791, _119118)
^  Unify: (273) [user] mfix_vars1(1791, _119118)
   Call: (274) [system] 1791==false
^  Redo: (273) [user] mfix_vars1(1791, _119118)
^  Unify: (273) [user] mfix_vars1(1791, _119118)
   Call: (274) [system] 1791==[_133044, _133050]
^  Redo: (273) [user] mfix_vars1(1791, _119118)
^  Unify: (273) [user] mfix_vars1(1791, _119118)
   Call: (274) [system] is_list(1791)
^  Redo: (273) [user] mfix_vars1(1791, _119118)
^  Unify: (273) [user] mfix_vars1(1791, _119118)
   Call: (274) [system] string(1791)
^  Redo: (273) [user] mfix_vars1(1791, _119118)
^  Unify: (273) [user] mfix_vars1(1791, _119118)
   Call: (274) [system] compound(1791)
^  Redo: (273) [user] mfix_vars1(1791, _119118)
^  Unify: (273) [user] mfix_vars1(1791, _119118)
^  Call: (274) [user] symbol(1791)
^  Unify: (274) [user] symbol(1791)
   Call: (275) [system] atom(1791)
   Fail: (275) [system] atom(1791)
^  Fail: (274) [user] symbol(1791)
^  Redo: (273) [user] mfix_vars1(1791, _119118)
   Call: (274) [system] 1791=_119118
   Exit: (274) [system] 1791=1791
^  Exit: (273) [user] mfix_vars1(1791, 1791)
   Call: (273) [apply] apply:maplist_([0], _119120, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_153444|_153446], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _153444)
^  Unify: (274) [user] mfix_vars1(0, _153444)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _153444)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_158090))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _153444)
^  Unify: (274) [user] mfix_vars1(0, _153444)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _153444)
^  Unify: (274) [user] mfix_vars1(0, _153444)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _153444)
^  Unify: (274) [user] mfix_vars1(0, _153444)
   Call: (275) [system] 0==[_167370, _167376]
^  Redo: (274) [user] mfix_vars1(0, _153444)
^  Unify: (274) [user] mfix_vars1(0, _153444)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _153444)
^  Unify: (274) [user] mfix_vars1(0, _153444)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _153444)
^  Unify: (274) [user] mfix_vars1(0, _153444)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _153444)
^  Unify: (274) [user] mfix_vars1(0, _153444)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _153444)
   Call: (275) [system] 0=_153444
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _153446, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1791, 0], [1791, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;", 1791, 0], [";;", 1791, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;", 1791, 0], [";;", 1791, 0])
   Call: (270) [system] compound_name_arguments(_47618, '$COMMENT', [";;", 1791, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;", 1791, 0), '$COMMENT', [";;", 1791, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1791, 0)\=@='$COMMENT'(";;", 1791, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1791, 0), _42032)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;", 1791, 0), _203618))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1791, 0), _203618))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;", 1791, 0), _203618))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1791, 0), _203618))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1791, 0), _203618)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1791, 0), _203618)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;", 1791, 0), _209204))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1791, 0), _209204))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;", 1791, 0), _209204)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1791, 0), _209204)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;", 1791, 0), _209204)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1791, 0)\=@='$COMMENT'(";;", 1791, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1791, 0), _203618)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;", 1791, 0), _36420))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1791, 0), _36420))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;", 1791, 0), _36420))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1791, 0), _36420))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1791, 0), _36420)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1791, 0), _36420)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;", 1791, 0), _231524))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1791, 0), _231524))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;", 1791, 0), _231524)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1791, 0), _231524)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;", 1791, 0), _231524)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0)))
   Call: (267) [system] '$COMMENT'(";;", 1791, 0)\=@='$COMMENT'(";;", 1791, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1791, 0), _36420)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0)))
   Call: (261) [system] '$COMMENT'(";;", 1791, 0)\=@='$COMMENT'(";;", 1791, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1791, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1791, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1791, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1791, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;", 1791, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;", 1791, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;", 1791, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;", 1791, 0), _260302, [], _260304)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;", 1791, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1791, 0), _260302, [], _260304)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1791, 0), _260302, [], _260304)
   Call: (258) [system] atom('$COMMENT'(";;", 1791, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;", 1791, 0), _260302, [], _260304)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;", 1791, 0), _260302, [], _260304)
   Call: (258) [system] compound('$COMMENT'(";;", 1791, 0))
   Exit: (258) [system] compound('$COMMENT'(";;", 1791, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;", 1791, 0), _269618, _269620)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1791, 0), '$COMMENT', [";;", 1791, 0])
^  Call: (258) [user] subst_vars([";;", 1791, 0], _271504, [], _260304)
^  Unify: (258) [user] subst_vars([";;", 1791, 0], [";;", 1791, 0], [], [])
   Call: (259) [system] var([";;", 1791, 0])
^  Redo: (258) [user] subst_vars([";;", 1791, 0], _271504, [], _260304)
^  Unify: (258) [user] subst_vars([";;", 1791, 0], [_275240|_275242], [], _260304)
^  Call: (259) [user] subst_vars(";;", _275240, [], _276180)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
   Call: (260) [system] var(";;")
^  Redo: (259) [user] subst_vars(";;", _275240, [], _276180)
^  Unify: (259) [user] subst_vars(";;", _275240, [], _276180)
   Call: (260) [system] atom(";;")
^  Redo: (259) [user] subst_vars(";;", _275240, [], _276180)
^  Unify: (259) [user] subst_vars(";;", _275240, [], _276180)
   Call: (260) [system] compound(";;")
^  Redo: (259) [user] subst_vars(";;", _275240, [], _276180)
^  Unify: (259) [user] subst_vars(";;", ";;", [], [])
^  Exit: (259) [user] subst_vars(";;", ";;", [], [])
^  Call: (259) [user] subst_vars([1791, 0], _275242, [], _260304)
^  Unify: (259) [user] subst_vars([1791, 0], [1791, 0], [], [])
   Call: (260) [system] var([1791, 0])
^  Redo: (259) [user] subst_vars([1791, 0], _275242, [], _260304)
^  Unify: (259) [user] subst_vars([1791, 0], [_291112|_291114], [], _260304)
^  Call: (260) [user] subst_vars(1791, _291112, [], _292052)
^  Unify: (260) [user] subst_vars(1791, 1791, [], [])
   Call: (261) [system] var(1791)
^  Redo: (260) [user] subst_vars(1791, _291112, [], _292052)
^  Unify: (260) [user] subst_vars(1791, _291112, [], _292052)
   Call: (261) [system] atom(1791)
^  Redo: (260) [user] subst_vars(1791, _291112, [], _292052)
^  Unify: (260) [user] subst_vars(1791, _291112, [], _292052)
   Call: (261) [system] compound(1791)
^  Redo: (260) [user] subst_vars(1791, _291112, [], _292052)
^  Unify: (260) [user] subst_vars(1791, 1791, [], [])
^  Exit: (260) [user] subst_vars(1791, 1791, [], [])
^  Call: (260) [user] subst_vars([0], _291114, [], _260304)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _291114, [], _260304)
^  Unify: (260) [user] subst_vars([0], [_306984|_306986], [], _260304)
^  Call: (261) [user] subst_vars(0, _306984, [], _307924)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _306984, [], _307924)
^  Unify: (261) [user] subst_vars(0, _306984, [], _307924)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _306984, [], _307924)
^  Unify: (261) [user] subst_vars(0, _306984, [], _307924)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _306984, [], _307924)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _306986, [], _260304)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _306986, [], _260304)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1791, 0], [1791, 0], [], [])
^  Exit: (258) [user] subst_vars([";;", 1791, 0], [";;", 1791, 0], [], [])
   Call: (258) [system] compound_name_arguments(_260302, '$COMMENT', [";;", 1791, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;", 1791, 0), '$COMMENT', [";;", 1791, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;", 1791, 0), '$COMMENT'(";;", 1791, 0), [], [])
   Call: (257) [system] _330342=metta_file_buffer(+, '$COMMENT'(";;", 1791, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;", 1791, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;", 1791, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1791, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;", 1791, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1791, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1791, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1791, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;", 1791, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1792, 0, 63731, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$stream_position'(63731, 1792, 0, 63765)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _383072))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _383072))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _383072)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _383072)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _383072)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _383072)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _388684))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _388684))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _388684))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _388684))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _388684)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _388684)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _394270))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _394270))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _394270)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _394270)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _394270)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _394270)
   Call: (270) [system] var('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _394270)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$VAR'(_401730))
   Call: (270) [system] atom('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _394270)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _394270)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _394270)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _394270)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _394270)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _394270)
   Call: (270) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0)==[_411010, _411016]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _394270)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _394270)
   Call: (270) [system] is_list('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _394270)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _394270)
   Call: (270) [system] string('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _394270)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _394270)
   Call: (270) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _421212, _421214)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0], _424954)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0], _424954)
   Call: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0], _424954, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0], [_427772|_427774], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _427772)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _427772)
   Call: (273) [system] var(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _427772)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", '$VAR'(_432418))
   Call: (273) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _427772)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _427772)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["==true
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _427772)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _427772)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["==false
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _427772)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _427772)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["==[_441698, _441704]
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _427772)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _427772)
   Call: (273) [system] is_list(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _427772)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _427772)
   Call: (273) [system] string(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Exit: (273) [system] string(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _427772)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _427772)
   Call: (273) [system] compound(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _427772)
^  Unify: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _427772)
^  Call: (273) [user] symbol(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Unify: (273) [user] symbol(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Call: (274) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Fail: (274) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Fail: (273) [user] symbol(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _427772)
   Call: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["=_427772
   Exit: (273) [system] ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["=";;     assert_eq_metta_results!(metta.run(parser), Ok(vec!["
^  Exit: (272) [user] mfix_vars1(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
   Call: (272) [apply] apply:maplist_([1792, 0], _427774, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1792, 0], [_465770|_465772], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1792, _465770)
^  Unify: (273) [user] mfix_vars1(1792, _465770)
   Call: (274) [system] var(1792)
^  Redo: (273) [user] mfix_vars1(1792, _465770)
^  Unify: (273) [user] mfix_vars1(1792, '$VAR'(_470416))
   Call: (274) [system] atom(1792)
^  Redo: (273) [user] mfix_vars1(1792, _465770)
^  Unify: (273) [user] mfix_vars1(1792, _465770)
   Call: (274) [system] 1792==true
^  Redo: (273) [user] mfix_vars1(1792, _465770)
^  Unify: (273) [user] mfix_vars1(1792, _465770)
   Call: (274) [system] 1792==false
^  Redo: (273) [user] mfix_vars1(1792, _465770)
^  Unify: (273) [user] mfix_vars1(1792, _465770)
   Call: (274) [system] 1792==[_479696, _479702]
^  Redo: (273) [user] mfix_vars1(1792, _465770)
^  Unify: (273) [user] mfix_vars1(1792, _465770)
   Call: (274) [system] is_list(1792)
^  Redo: (273) [user] mfix_vars1(1792, _465770)
^  Unify: (273) [user] mfix_vars1(1792, _465770)
   Call: (274) [system] string(1792)
^  Redo: (273) [user] mfix_vars1(1792, _465770)
^  Unify: (273) [user] mfix_vars1(1792, _465770)
   Call: (274) [system] compound(1792)
^  Redo: (273) [user] mfix_vars1(1792, _465770)
^  Unify: (273) [user] mfix_vars1(1792, _465770)
^  Call: (274) [user] symbol(1792)
^  Unify: (274) [user] symbol(1792)
   Call: (275) [system] atom(1792)
   Fail: (275) [system] atom(1792)
^  Fail: (274) [user] symbol(1792)
^  Redo: (273) [user] mfix_vars1(1792, _465770)
   Call: (274) [system] 1792=_465770
   Exit: (274) [system] 1792=1792
^  Exit: (273) [user] mfix_vars1(1792, 1792)
   Call: (273) [apply] apply:maplist_([0], _465772, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_500096|_500098], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _500096)
^  Unify: (274) [user] mfix_vars1(0, _500096)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _500096)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_504742))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _500096)
^  Unify: (274) [user] mfix_vars1(0, _500096)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _500096)
^  Unify: (274) [user] mfix_vars1(0, _500096)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _500096)
^  Unify: (274) [user] mfix_vars1(0, _500096)
   Call: (275) [system] 0==[_514022, _514028]
^  Redo: (274) [user] mfix_vars1(0, _500096)
^  Unify: (274) [user] mfix_vars1(0, _500096)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _500096)
^  Unify: (274) [user] mfix_vars1(0, _500096)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _500096)
^  Unify: (274) [user] mfix_vars1(0, _500096)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _6048)
^  Unify: (274) [user] mfix_vars1(0, _6048)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6048)
   Call: (275) [system] 0=_6048
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6050, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1792, 0], [1792, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0])
   Call: (270) [system] compound_name_arguments(_5990, '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _5976)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _32446))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _32446))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _32446))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _32446))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _32446)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _32446)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _38032))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _38032))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _38032)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _38032)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _38032)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _32446)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _5956))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _5956))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _5956))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _5956))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _5956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _5956)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _60352))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _60352))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _60352)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _60352)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _60352)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0)))
   Call: (267) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _5956)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0)))
   Call: (261) [system] '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0)\=@='$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _89130, [], _89132)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _89130, [], _89132)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _89130, [], _89132)
   Call: (258) [system] atom('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _89130, [], _89132)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _89130, [], _89132)
   Call: (258) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), _98446, _98448)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0])
^  Call: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0], _100332, [], _89132)
^  Unify: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0], [], [])
   Call: (259) [system] var([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0])
^  Redo: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0], _100332, [], _89132)
^  Unify: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0], [_104068|_104070], [], _89132)
^  Call: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _104068, [], _105008)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", [], [])
   Call: (260) [system] var(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _104068, [], _105008)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _104068, [], _105008)
   Call: (260) [system] atom(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _104068, [], _105008)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _104068, [], _105008)
   Call: (260) [system] compound(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![")
^  Redo: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", _104068, [], _105008)
^  Unify: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", [], [])
^  Exit: (259) [user] subst_vars(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", ";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", [], [])
^  Call: (259) [user] subst_vars([1792, 0], _104070, [], _89132)
^  Unify: (259) [user] subst_vars([1792, 0], [1792, 0], [], [])
   Call: (260) [system] var([1792, 0])
^  Redo: (259) [user] subst_vars([1792, 0], _104070, [], _89132)
^  Unify: (259) [user] subst_vars([1792, 0], [_119940|_119942], [], _89132)
^  Call: (260) [user] subst_vars(1792, _119940, [], _120880)
^  Unify: (260) [user] subst_vars(1792, 1792, [], [])
   Call: (261) [system] var(1792)
^  Redo: (260) [user] subst_vars(1792, _119940, [], _120880)
^  Unify: (260) [user] subst_vars(1792, _119940, [], _120880)
   Call: (261) [system] atom(1792)
^  Redo: (260) [user] subst_vars(1792, _119940, [], _120880)
^  Unify: (260) [user] subst_vars(1792, _119940, [], _120880)
   Call: (261) [system] compound(1792)
^  Redo: (260) [user] subst_vars(1792, _119940, [], _120880)
^  Unify: (260) [user] subst_vars(1792, 1792, [], [])
^  Exit: (260) [user] subst_vars(1792, 1792, [], [])
^  Call: (260) [user] subst_vars([0], _119942, [], _89132)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _119942, [], _89132)
^  Unify: (260) [user] subst_vars([0], [_135812|_135814], [], _89132)
^  Call: (261) [user] subst_vars(0, _135812, [], _136752)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _135812, [], _136752)
^  Unify: (261) [user] subst_vars(0, _135812, [], _136752)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _135812, [], _136752)
^  Unify: (261) [user] subst_vars(0, _135812, [], _136752)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _135812, [], _136752)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _135814, [], _89132)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _135814, [], _89132)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1792, 0], [1792, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0], [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0], [], [])
   Call: (258) [system] compound_name_arguments(_89130, '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT', [";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), [], [])
   Call: (257) [system] _159170=metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     assert_eq_metta_results!(metta.run(parser), Ok(vec![", 1792, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1793, 0, 63791, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$stream_position'(63791, 1793, 0, 63825)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _211900))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _211900))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _211900)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _211900)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _211900)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _211900)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _217512))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _217512))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _217512))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _217512))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _217512)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _217512)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _223098))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _223098))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _223098)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _223098)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _223098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _223098)
   Call: (270) [system] var('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _223098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$VAR'(_230558))
   Call: (270) [system] atom('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _223098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _223098)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _223098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _223098)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _223098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _223098)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0)==[_239838, _239844]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _223098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _223098)
   Call: (270) [system] is_list('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _223098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _223098)
   Call: (270) [system] string('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _223098)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _223098)
   Call: (270) [system] compound('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _250040, _250042)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT', [";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0], _253782)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0], _253782)
   Call: (271) [apply] apply:maplist_([";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0], _253782, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0], [_256600|_256602], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _256600)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _256600)
   Call: (273) [system] var(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _256600)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", '$VAR'(_261246))
   Call: (273) [system] atom(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _256600)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _256600)
   Call: (273) [system] ";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],"==true
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _256600)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _256600)
   Call: (273) [system] ";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],"==false
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _256600)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _256600)
   Call: (273) [system] ";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],"==[_270526, _270532]
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _256600)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _256600)
   Call: (273) [system] is_list(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _256600)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _256600)
   Call: (273) [system] string(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],")
   Exit: (273) [system] string(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _256600)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _256600)
   Call: (273) [system] compound(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _256600)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _256600)
^  Call: (273) [user] symbol(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],")
^  Unify: (273) [user] symbol(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],")
   Call: (274) [system] atom(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],")
   Fail: (274) [system] atom(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],")
^  Fail: (273) [user] symbol(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _256600)
   Call: (273) [system] ";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],"=_256600
   Exit: (273) [system] ";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],"=";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],"
^  Exit: (272) [user] mfix_vars1(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", ";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],")
   Call: (272) [apply] apply:maplist_([1793, 0], _256602, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1793, 0], [_294598|_294600], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1793, _294598)
^  Unify: (273) [user] mfix_vars1(1793, _294598)
   Call: (274) [system] var(1793)
^  Redo: (273) [user] mfix_vars1(1793, _294598)
^  Unify: (273) [user] mfix_vars1(1793, '$VAR'(_299244))
   Call: (274) [system] atom(1793)
^  Redo: (273) [user] mfix_vars1(1793, _294598)
^  Unify: (273) [user] mfix_vars1(1793, _294598)
   Call: (274) [system] 1793==true
^  Redo: (273) [user] mfix_vars1(1793, _294598)
^  Unify: (273) [user] mfix_vars1(1793, _294598)
   Call: (274) [system] 1793==false
^  Redo: (273) [user] mfix_vars1(1793, _294598)
^  Unify: (273) [user] mfix_vars1(1793, _294598)
   Call: (274) [system] 1793==[_308524, _308530]
^  Redo: (273) [user] mfix_vars1(1793, _294598)
^  Unify: (273) [user] mfix_vars1(1793, _294598)
   Call: (274) [system] is_list(1793)
^  Redo: (273) [user] mfix_vars1(1793, _294598)
^  Unify: (273) [user] mfix_vars1(1793, _294598)
   Call: (274) [system] string(1793)
^  Redo: (273) [user] mfix_vars1(1793, _294598)
^  Unify: (273) [user] mfix_vars1(1793, _294598)
   Call: (274) [system] compound(1793)
^  Redo: (273) [user] mfix_vars1(1793, _294598)
^  Unify: (273) [user] mfix_vars1(1793, _294598)
^  Call: (274) [user] symbol(1793)
^  Unify: (274) [user] symbol(1793)
   Call: (275) [system] atom(1793)
   Fail: (275) [system] atom(1793)
^  Fail: (274) [user] symbol(1793)
^  Redo: (273) [user] mfix_vars1(1793, _294598)
   Call: (274) [system] 1793=_294598
   Exit: (274) [system] 1793=1793
^  Exit: (273) [user] mfix_vars1(1793, 1793)
   Call: (273) [apply] apply:maplist_([0], _294600, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_328924|_328926], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _328924)
^  Unify: (274) [user] mfix_vars1(0, _328924)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _328924)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_333570))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _328924)
^  Unify: (274) [user] mfix_vars1(0, _328924)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _328924)
^  Unify: (274) [user] mfix_vars1(0, _328924)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _328924)
^  Unify: (274) [user] mfix_vars1(0, _328924)
   Call: (275) [system] 0==[_342850, _342856]
^  Redo: (274) [user] mfix_vars1(0, _328924)
^  Unify: (274) [user] mfix_vars1(0, _328924)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _328924)
^  Unify: (274) [user] mfix_vars1(0, _328924)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _328924)
^  Unify: (274) [user] mfix_vars1(0, _328924)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _328924)
^  Unify: (274) [user] mfix_vars1(0, _328924)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _328924)
   Call: (275) [system] 0=_328924
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _328926, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1793, 0], [1793, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0], [";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0], [";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0])
   Call: (270) [system] compound_name_arguments(_223098, '$COMMENT', [";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT', [";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0)\=@='$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _217512)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _379098))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _379098))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _379098))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _379098))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _379098)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _379098)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _384684))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _384684))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _384684)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _384684)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _384684)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0)\=@='$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _379098)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _211900))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _211900))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _211900))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _211900))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _211900)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _211900)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _407004))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _407004))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _407004)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _407004)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _407004)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0)\=@='$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _211900)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0)))
   Call: (261) [system] '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0)\=@='$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _435782, [], _435784)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _435782, [], _435784)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _435782, [], _435784)
   Call: (258) [system] atom('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _435782, [], _435784)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _435782, [], _435784)
   Call: (258) [system] compound('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), _445098, _445100)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT', [";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0])
^  Call: (258) [user] subst_vars([";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0], _446984, [], _435784)
^  Unify: (258) [user] subst_vars([";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0], [";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0], [], [])
   Call: (259) [system] var([";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0])
^  Redo: (258) [user] subst_vars([";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0], _446984, [], _435784)
^  Unify: (258) [user] subst_vars([";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0], [_450720|_450722], [], _435784)
^  Call: (259) [user] subst_vars(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _450720, [], _451660)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", ";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", [], [])
   Call: (260) [system] var(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _450720, [], _451660)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _450720, [], _451660)
   Call: (260) [system] atom(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _450720, [], _451660)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _450720, [], _451660)
   Call: (260) [system] compound(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", _450720, [], _451660)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", ";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", [], [])
^  Exit: (259) [user] subst_vars(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", ";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", [], [])
^  Call: (259) [user] subst_vars([1793, 0], _450722, [], _435784)
^  Unify: (259) [user] subst_vars([1793, 0], [1793, 0], [], [])
   Call: (260) [system] var([1793, 0])
^  Redo: (259) [user] subst_vars([1793, 0], _450722, [], _435784)
^  Unify: (259) [user] subst_vars([1793, 0], [_466592|_466594], [], _435784)
^  Call: (260) [user] subst_vars(1793, _466592, [], _467532)
^  Unify: (260) [user] subst_vars(1793, 1793, [], [])
   Call: (261) [system] var(1793)
^  Redo: (260) [user] subst_vars(1793, _466592, [], _467532)
^  Unify: (260) [user] subst_vars(1793, _466592, [], _467532)
   Call: (261) [system] atom(1793)
^  Redo: (260) [user] subst_vars(1793, _466592, [], _467532)
^  Unify: (260) [user] subst_vars(1793, _466592, [], _467532)
   Call: (261) [system] compound(1793)
^  Redo: (260) [user] subst_vars(1793, _466592, [], _467532)
^  Unify: (260) [user] subst_vars(1793, 1793, [], [])
^  Exit: (260) [user] subst_vars(1793, 1793, [], [])
^  Call: (260) [user] subst_vars([0], _466594, [], _435784)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _466594, [], _435784)
^  Unify: (260) [user] subst_vars([0], [_482464|_482466], [], _435784)
^  Call: (261) [user] subst_vars(0, _482464, [], _483404)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _482464, [], _483404)
^  Unify: (261) [user] subst_vars(0, _482464, [], _483404)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _482464, [], _483404)
^  Unify: (261) [user] subst_vars(0, _482464, [], _483404)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _482464, [], _483404)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _482466, [], _435784)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _482466, [], _435784)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1793, 0], [1793, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0], [";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0], [], [])
   Call: (258) [system] compound_name_arguments(_435782, '$COMMENT', [";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT', [";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), [], [])
   Call: (257) [system] _505822=metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"->\" \"Atom\" \"Atom\" \"ErrorType\")],", 1793, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1794, 0, 63847, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$stream_position'(63847, 1794, 0, 63881)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _41268))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _41268))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _41268)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _41268)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _41268)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _41268)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _46880))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _46880))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _46880))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _46880))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _46880)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _46880)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _52466))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _52466))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _52466)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _52466)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _52466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _52466)
   Call: (270) [system] var('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _52466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$VAR'(_59926))
   Call: (270) [system] atom('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _52466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _52466)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _52466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _52466)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _52466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _52466)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0)==[_69206, _69212]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _52466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _52466)
   Call: (270) [system] is_list('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _52466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _52466)
   Call: (270) [system] string('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _52466)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _52466)
   Call: (270) [system] compound('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _79408, _79410)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT', [";;         vec![expr!(\"Symbol\")],", 1794, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         vec![expr!(\"Symbol\")],", 1794, 0], _83150)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         vec![expr!(\"Symbol\")],", 1794, 0], _83150)
   Call: (271) [apply] apply:maplist_([";;         vec![expr!(\"Symbol\")],", 1794, 0], _83150, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         vec![expr!(\"Symbol\")],", 1794, 0], [_85968|_85970], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         vec![expr!(\"Symbol\")],", _85968)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"Symbol\")],", _85968)
   Call: (273) [system] var(";;         vec![expr!(\"Symbol\")],")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"Symbol\")],", _85968)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"Symbol\")],", '$VAR'(_90614))
   Call: (273) [system] atom(";;         vec![expr!(\"Symbol\")],")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"Symbol\")],", _85968)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"Symbol\")],", _85968)
   Call: (273) [system] ";;         vec![expr!(\"Symbol\")],"==true
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"Symbol\")],", _85968)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"Symbol\")],", _85968)
   Call: (273) [system] ";;         vec![expr!(\"Symbol\")],"==false
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"Symbol\")],", _85968)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"Symbol\")],", _85968)
   Call: (273) [system] ";;         vec![expr!(\"Symbol\")],"==[_99894, _99900]
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"Symbol\")],", _85968)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"Symbol\")],", _85968)
   Call: (273) [system] is_list(";;         vec![expr!(\"Symbol\")],")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"Symbol\")],", _85968)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"Symbol\")],", _85968)
   Call: (273) [system] string(";;         vec![expr!(\"Symbol\")],")
   Exit: (273) [system] string(";;         vec![expr!(\"Symbol\")],")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"Symbol\")],", _85968)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"Symbol\")],", _85968)
   Call: (273) [system] compound(";;         vec![expr!(\"Symbol\")],")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"Symbol\")],", _85968)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"Symbol\")],", _85968)
^  Call: (273) [user] symbol(";;         vec![expr!(\"Symbol\")],")
^  Unify: (273) [user] symbol(";;         vec![expr!(\"Symbol\")],")
   Call: (274) [system] atom(";;         vec![expr!(\"Symbol\")],")
   Fail: (274) [system] atom(";;         vec![expr!(\"Symbol\")],")
^  Fail: (273) [user] symbol(";;         vec![expr!(\"Symbol\")],")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"Symbol\")],", _85968)
   Call: (273) [system] ";;         vec![expr!(\"Symbol\")],"=_85968
   Exit: (273) [system] ";;         vec![expr!(\"Symbol\")],"=";;         vec![expr!(\"Symbol\")],"
^  Exit: (272) [user] mfix_vars1(";;         vec![expr!(\"Symbol\")],", ";;         vec![expr!(\"Symbol\")],")
   Call: (272) [apply] apply:maplist_([1794, 0], _85970, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1794, 0], [_123966|_123968], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1794, _123966)
^  Unify: (273) [user] mfix_vars1(1794, _123966)
   Call: (274) [system] var(1794)
^  Redo: (273) [user] mfix_vars1(1794, _123966)
^  Unify: (273) [user] mfix_vars1(1794, '$VAR'(_128612))
   Call: (274) [system] atom(1794)
^  Redo: (273) [user] mfix_vars1(1794, _123966)
^  Unify: (273) [user] mfix_vars1(1794, _123966)
   Call: (274) [system] 1794==true
^  Redo: (273) [user] mfix_vars1(1794, _123966)
^  Unify: (273) [user] mfix_vars1(1794, _123966)
   Call: (274) [system] 1794==false
^  Redo: (273) [user] mfix_vars1(1794, _123966)
^  Unify: (273) [user] mfix_vars1(1794, _123966)
   Call: (274) [system] 1794==[_137892, _137898]
^  Redo: (273) [user] mfix_vars1(1794, _123966)
^  Unify: (273) [user] mfix_vars1(1794, _123966)
   Call: (274) [system] is_list(1794)
^  Redo: (273) [user] mfix_vars1(1794, _123966)
^  Unify: (273) [user] mfix_vars1(1794, _123966)
   Call: (274) [system] string(1794)
^  Redo: (273) [user] mfix_vars1(1794, _123966)
^  Unify: (273) [user] mfix_vars1(1794, _123966)
   Call: (274) [system] compound(1794)
^  Redo: (273) [user] mfix_vars1(1794, _123966)
^  Unify: (273) [user] mfix_vars1(1794, _123966)
^  Call: (274) [user] symbol(1794)
^  Unify: (274) [user] symbol(1794)
   Call: (275) [system] atom(1794)
   Fail: (275) [system] atom(1794)
^  Fail: (274) [user] symbol(1794)
^  Redo: (273) [user] mfix_vars1(1794, _123966)
   Call: (274) [system] 1794=_123966
   Exit: (274) [system] 1794=1794
^  Exit: (273) [user] mfix_vars1(1794, 1794)
   Call: (273) [apply] apply:maplist_([0], _123968, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_158292|_158294], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _158292)
^  Unify: (274) [user] mfix_vars1(0, _158292)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _158292)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_162938))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _158292)
^  Unify: (274) [user] mfix_vars1(0, _158292)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _158292)
^  Unify: (274) [user] mfix_vars1(0, _158292)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _158292)
^  Unify: (274) [user] mfix_vars1(0, _158292)
   Call: (275) [system] 0==[_172218, _172224]
^  Redo: (274) [user] mfix_vars1(0, _158292)
^  Unify: (274) [user] mfix_vars1(0, _158292)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _158292)
^  Unify: (274) [user] mfix_vars1(0, _158292)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _158292)
^  Unify: (274) [user] mfix_vars1(0, _158292)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _158292)
^  Unify: (274) [user] mfix_vars1(0, _158292)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _158292)
   Call: (275) [system] 0=_158292
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _158294, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1794, 0], [1794, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         vec![expr!(\"Symbol\")],", 1794, 0], [";;         vec![expr!(\"Symbol\")],", 1794, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         vec![expr!(\"Symbol\")],", 1794, 0], [";;         vec![expr!(\"Symbol\")],", 1794, 0])
   Call: (270) [system] compound_name_arguments(_52466, '$COMMENT', [";;         vec![expr!(\"Symbol\")],", 1794, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT', [";;         vec![expr!(\"Symbol\")],", 1794, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0)\=@='$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _46880)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _208466))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _208466))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _208466))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _208466))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _208466)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _208466)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _214052))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _214052))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _214052)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _214052)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _214052)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0)\=@='$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _208466)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _41268))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _41268))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _41268))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _41268))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _41268)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _41268)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _236372))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _236372))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _236372)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _236372)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _236372)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0)\=@='$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _41268)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0)))
   Call: (261) [system] '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0)\=@='$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _265150, [], _265152)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _265150, [], _265152)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _265150, [], _265152)
   Call: (258) [system] atom('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _265150, [], _265152)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _265150, [], _265152)
   Call: (258) [system] compound('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), _274466, _274468)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT', [";;         vec![expr!(\"Symbol\")],", 1794, 0])
^  Call: (258) [user] subst_vars([";;         vec![expr!(\"Symbol\")],", 1794, 0], _276352, [], _265152)
^  Unify: (258) [user] subst_vars([";;         vec![expr!(\"Symbol\")],", 1794, 0], [";;         vec![expr!(\"Symbol\")],", 1794, 0], [], [])
   Call: (259) [system] var([";;         vec![expr!(\"Symbol\")],", 1794, 0])
^  Redo: (258) [user] subst_vars([";;         vec![expr!(\"Symbol\")],", 1794, 0], _276352, [], _265152)
^  Unify: (258) [user] subst_vars([";;         vec![expr!(\"Symbol\")],", 1794, 0], [_280088|_280090], [], _265152)
^  Call: (259) [user] subst_vars(";;         vec![expr!(\"Symbol\")],", _280088, [], _281028)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"Symbol\")],", ";;         vec![expr!(\"Symbol\")],", [], [])
   Call: (260) [system] var(";;         vec![expr!(\"Symbol\")],")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"Symbol\")],", _280088, [], _281028)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"Symbol\")],", _280088, [], _281028)
   Call: (260) [system] atom(";;         vec![expr!(\"Symbol\")],")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"Symbol\")],", _280088, [], _281028)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"Symbol\")],", _280088, [], _281028)
   Call: (260) [system] compound(";;         vec![expr!(\"Symbol\")],")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"Symbol\")],", _280088, [], _281028)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"Symbol\")],", ";;         vec![expr!(\"Symbol\")],", [], [])
^  Exit: (259) [user] subst_vars(";;         vec![expr!(\"Symbol\")],", ";;         vec![expr!(\"Symbol\")],", [], [])
^  Call: (259) [user] subst_vars([1794, 0], _280090, [], _265152)
^  Unify: (259) [user] subst_vars([1794, 0], [1794, 0], [], [])
   Call: (260) [system] var([1794, 0])
^  Redo: (259) [user] subst_vars([1794, 0], _280090, [], _265152)
^  Unify: (259) [user] subst_vars([1794, 0], [_295960|_295962], [], _265152)
^  Call: (260) [user] subst_vars(1794, _295960, [], _296900)
^  Unify: (260) [user] subst_vars(1794, 1794, [], [])
   Call: (261) [system] var(1794)
^  Redo: (260) [user] subst_vars(1794, _295960, [], _296900)
^  Unify: (260) [user] subst_vars(1794, _295960, [], _296900)
   Call: (261) [system] atom(1794)
^  Redo: (260) [user] subst_vars(1794, _295960, [], _296900)
^  Unify: (260) [user] subst_vars(1794, _295960, [], _296900)
   Call: (261) [system] compound(1794)
^  Redo: (260) [user] subst_vars(1794, _295960, [], _296900)
^  Unify: (260) [user] subst_vars(1794, 1794, [], [])
^  Exit: (260) [user] subst_vars(1794, 1794, [], [])
^  Call: (260) [user] subst_vars([0], _295962, [], _265152)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _295962, [], _265152)
^  Unify: (260) [user] subst_vars([0], [_311832|_311834], [], _265152)
^  Call: (261) [user] subst_vars(0, _311832, [], _312772)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _311832, [], _312772)
^  Unify: (261) [user] subst_vars(0, _311832, [], _312772)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _311832, [], _312772)
^  Unify: (261) [user] subst_vars(0, _311832, [], _312772)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _311832, [], _312772)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _311834, [], _265152)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _311834, [], _265152)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1794, 0], [1794, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         vec![expr!(\"Symbol\")],", 1794, 0], [";;         vec![expr!(\"Symbol\")],", 1794, 0], [], [])
   Call: (258) [system] compound_name_arguments(_265150, '$COMMENT', [";;         vec![expr!(\"Symbol\")],", 1794, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT', [";;         vec![expr!(\"Symbol\")],", 1794, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), [], [])
   Call: (257) [system] _335190=metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"Symbol\")],", 1794, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1795, 0, 63881, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$stream_position'(63881, 1795, 0, 63915)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _387914))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _387914))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _387914)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _387914)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _387914)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _387914)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _393526))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _393526))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _393526))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _393526))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _393526)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _393526)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _399112))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _399112))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _399112)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _399112)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _399112)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _399112)
   Call: (270) [system] var('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _399112)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$VAR'(_406572))
   Call: (270) [system] atom('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _399112)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _399112)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _399112)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _399112)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _399112)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _399112)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0)==[_415852, _415858]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _399112)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _399112)
   Call: (270) [system] is_list('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _399112)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _399112)
   Call: (270) [system] string('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _399112)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _399112)
   Call: (270) [system] compound('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _426054, _426056)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT', [";;         vec![expr!(\"ErrorType\")],", 1795, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         vec![expr!(\"ErrorType\")],", 1795, 0], _429796)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         vec![expr!(\"ErrorType\")],", 1795, 0], _429796)
   Call: (271) [apply] apply:maplist_([";;         vec![expr!(\"ErrorType\")],", 1795, 0], _429796, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         vec![expr!(\"ErrorType\")],", 1795, 0], [_432614|_432616], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         vec![expr!(\"ErrorType\")],", _432614)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"ErrorType\")],", _432614)
   Call: (273) [system] var(";;         vec![expr!(\"ErrorType\")],")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"ErrorType\")],", _432614)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"ErrorType\")],", '$VAR'(_437260))
   Call: (273) [system] atom(";;         vec![expr!(\"ErrorType\")],")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"ErrorType\")],", _432614)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"ErrorType\")],", _432614)
   Call: (273) [system] ";;         vec![expr!(\"ErrorType\")],"==true
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"ErrorType\")],", _432614)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"ErrorType\")],", _432614)
   Call: (273) [system] ";;         vec![expr!(\"ErrorType\")],"==false
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"ErrorType\")],", _432614)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"ErrorType\")],", _432614)
   Call: (273) [system] ";;         vec![expr!(\"ErrorType\")],"==[_446540, _446546]
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"ErrorType\")],", _432614)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"ErrorType\")],", _432614)
   Call: (273) [system] is_list(";;         vec![expr!(\"ErrorType\")],")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"ErrorType\")],", _432614)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"ErrorType\")],", _432614)
   Call: (273) [system] string(";;         vec![expr!(\"ErrorType\")],")
   Exit: (273) [system] string(";;         vec![expr!(\"ErrorType\")],")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"ErrorType\")],", _432614)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"ErrorType\")],", _432614)
   Call: (273) [system] compound(";;         vec![expr!(\"ErrorType\")],")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"ErrorType\")],", _432614)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"ErrorType\")],", _432614)
^  Call: (273) [user] symbol(";;         vec![expr!(\"ErrorType\")],")
^  Unify: (273) [user] symbol(";;         vec![expr!(\"ErrorType\")],")
   Call: (274) [system] atom(";;         vec![expr!(\"ErrorType\")],")
   Fail: (274) [system] atom(";;         vec![expr!(\"ErrorType\")],")
^  Fail: (273) [user] symbol(";;         vec![expr!(\"ErrorType\")],")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"ErrorType\")],", _432614)
   Call: (273) [system] ";;         vec![expr!(\"ErrorType\")],"=_432614
   Exit: (273) [system] ";;         vec![expr!(\"ErrorType\")],"=";;         vec![expr!(\"ErrorType\")],"
^  Exit: (272) [user] mfix_vars1(";;         vec![expr!(\"ErrorType\")],", ";;         vec![expr!(\"ErrorType\")],")
   Call: (272) [apply] apply:maplist_([1795, 0], _432616, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1795, 0], [_470612|_470614], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1795, _470612)
^  Unify: (273) [user] mfix_vars1(1795, _470612)
   Call: (274) [system] var(1795)
^  Redo: (273) [user] mfix_vars1(1795, _470612)
^  Unify: (273) [user] mfix_vars1(1795, '$VAR'(_475258))
   Call: (274) [system] atom(1795)
^  Redo: (273) [user] mfix_vars1(1795, _470612)
^  Unify: (273) [user] mfix_vars1(1795, _470612)
   Call: (274) [system] 1795==true
^  Redo: (273) [user] mfix_vars1(1795, _470612)
^  Unify: (273) [user] mfix_vars1(1795, _470612)
   Call: (274) [system] 1795==false
^  Redo: (273) [user] mfix_vars1(1795, _470612)
^  Unify: (273) [user] mfix_vars1(1795, _470612)
   Call: (274) [system] 1795==[_484538, _484544]
^  Redo: (273) [user] mfix_vars1(1795, _470612)
^  Unify: (273) [user] mfix_vars1(1795, _470612)
   Call: (274) [system] is_list(1795)
^  Redo: (273) [user] mfix_vars1(1795, _470612)
^  Unify: (273) [user] mfix_vars1(1795, _470612)
   Call: (274) [system] string(1795)
^  Redo: (273) [user] mfix_vars1(1795, _470612)
^  Unify: (273) [user] mfix_vars1(1795, _470612)
   Call: (274) [system] compound(1795)
^  Redo: (273) [user] mfix_vars1(1795, _470612)
^  Unify: (273) [user] mfix_vars1(1795, _470612)
^  Call: (274) [user] symbol(1795)
^  Unify: (274) [user] symbol(1795)
   Call: (275) [system] atom(1795)
   Fail: (275) [system] atom(1795)
^  Fail: (274) [user] symbol(1795)
^  Redo: (273) [user] mfix_vars1(1795, _470612)
   Call: (274) [system] 1795=_470612
   Exit: (274) [system] 1795=1795
^  Exit: (273) [user] mfix_vars1(1795, 1795)
   Call: (273) [apply] apply:maplist_([0], _470614, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_504938|_504940], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _504938)
^  Unify: (274) [user] mfix_vars1(0, _504938)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _504938)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_509584))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _504938)
^  Unify: (274) [user] mfix_vars1(0, _504938)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _504938)
^  Unify: (274) [user] mfix_vars1(0, _504938)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _504938)
^  Unify: (274) [user] mfix_vars1(0, _504938)
   Call: (275) [system] 0==[_518864, _518870]
^  Redo: (274) [user] mfix_vars1(0, _504938)
^  Unify: (274) [user] mfix_vars1(0, _504938)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _504938)
^  Unify: (274) [user] mfix_vars1(0, _6042)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _6042)
^  Unify: (274) [user] mfix_vars1(0, _6042)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _6042)
^  Unify: (274) [user] mfix_vars1(0, _6042)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6042)
   Call: (275) [system] 0=_6042
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6044, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1795, 0], [1795, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         vec![expr!(\"ErrorType\")],", 1795, 0], [";;         vec![expr!(\"ErrorType\")],", 1795, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         vec![expr!(\"ErrorType\")],", 1795, 0], [";;         vec![expr!(\"ErrorType\")],", 1795, 0])
   Call: (270) [system] compound_name_arguments(_5984, '$COMMENT', [";;         vec![expr!(\"ErrorType\")],", 1795, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT', [";;         vec![expr!(\"ErrorType\")],", 1795, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0)\=@='$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _5970)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _37296))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _37296))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _37296))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _37296))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _37296)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _37296)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _42882))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _42882))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _42882)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _42882)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _42882)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0)\=@='$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _37296)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _5950))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _5950))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _5950))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _5950))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _5950)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _65202))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _65202))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _65202)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _65202)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _65202)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0)\=@='$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _5950)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0)))
   Call: (261) [system] '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0)\=@='$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _93980, [], _93982)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _93980, [], _93982)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _93980, [], _93982)
   Call: (258) [system] atom('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _93980, [], _93982)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _93980, [], _93982)
   Call: (258) [system] compound('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), _103296, _103298)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT', [";;         vec![expr!(\"ErrorType\")],", 1795, 0])
^  Call: (258) [user] subst_vars([";;         vec![expr!(\"ErrorType\")],", 1795, 0], _105182, [], _93982)
^  Unify: (258) [user] subst_vars([";;         vec![expr!(\"ErrorType\")],", 1795, 0], [";;         vec![expr!(\"ErrorType\")],", 1795, 0], [], [])
   Call: (259) [system] var([";;         vec![expr!(\"ErrorType\")],", 1795, 0])
^  Redo: (258) [user] subst_vars([";;         vec![expr!(\"ErrorType\")],", 1795, 0], _105182, [], _93982)
^  Unify: (258) [user] subst_vars([";;         vec![expr!(\"ErrorType\")],", 1795, 0], [_108918|_108920], [], _93982)
^  Call: (259) [user] subst_vars(";;         vec![expr!(\"ErrorType\")],", _108918, [], _109858)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"ErrorType\")],", ";;         vec![expr!(\"ErrorType\")],", [], [])
   Call: (260) [system] var(";;         vec![expr!(\"ErrorType\")],")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"ErrorType\")],", _108918, [], _109858)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"ErrorType\")],", _108918, [], _109858)
   Call: (260) [system] atom(";;         vec![expr!(\"ErrorType\")],")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"ErrorType\")],", _108918, [], _109858)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"ErrorType\")],", _108918, [], _109858)
   Call: (260) [system] compound(";;         vec![expr!(\"ErrorType\")],")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"ErrorType\")],", _108918, [], _109858)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"ErrorType\")],", ";;         vec![expr!(\"ErrorType\")],", [], [])
^  Exit: (259) [user] subst_vars(";;         vec![expr!(\"ErrorType\")],", ";;         vec![expr!(\"ErrorType\")],", [], [])
^  Call: (259) [user] subst_vars([1795, 0], _108920, [], _93982)
^  Unify: (259) [user] subst_vars([1795, 0], [1795, 0], [], [])
   Call: (260) [system] var([1795, 0])
^  Redo: (259) [user] subst_vars([1795, 0], _108920, [], _93982)
^  Unify: (259) [user] subst_vars([1795, 0], [_124790|_124792], [], _93982)
^  Call: (260) [user] subst_vars(1795, _124790, [], _125730)
^  Unify: (260) [user] subst_vars(1795, 1795, [], [])
   Call: (261) [system] var(1795)
^  Redo: (260) [user] subst_vars(1795, _124790, [], _125730)
^  Unify: (260) [user] subst_vars(1795, _124790, [], _125730)
   Call: (261) [system] atom(1795)
^  Redo: (260) [user] subst_vars(1795, _124790, [], _125730)
^  Unify: (260) [user] subst_vars(1795, _124790, [], _125730)
   Call: (261) [system] compound(1795)
^  Redo: (260) [user] subst_vars(1795, _124790, [], _125730)
^  Unify: (260) [user] subst_vars(1795, 1795, [], [])
^  Exit: (260) [user] subst_vars(1795, 1795, [], [])
^  Call: (260) [user] subst_vars([0], _124792, [], _93982)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _124792, [], _93982)
^  Unify: (260) [user] subst_vars([0], [_140662|_140664], [], _93982)
^  Call: (261) [user] subst_vars(0, _140662, [], _141602)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _140662, [], _141602)
^  Unify: (261) [user] subst_vars(0, _140662, [], _141602)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _140662, [], _141602)
^  Unify: (261) [user] subst_vars(0, _140662, [], _141602)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _140662, [], _141602)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _140664, [], _93982)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _140664, [], _93982)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1795, 0], [1795, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         vec![expr!(\"ErrorType\")],", 1795, 0], [";;         vec![expr!(\"ErrorType\")],", 1795, 0], [], [])
   Call: (258) [system] compound_name_arguments(_93980, '$COMMENT', [";;         vec![expr!(\"ErrorType\")],", 1795, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT', [";;         vec![expr!(\"ErrorType\")],", 1795, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), [], [])
   Call: (257) [system] _164020=metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"ErrorType\")],", 1795, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1796, 0, 63918, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$stream_position'(63918, 1796, 0, 63952)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _216768))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _216768))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _216768)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _216768)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _216768)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _216768)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _222380))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _222380))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _222380))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _222380))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _222380)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _222380)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _227966))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _227966))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _227966)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _227966)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _227966)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _227966)
   Call: (270) [system] var('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _227966)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$VAR'(_235426))
   Call: (270) [system] atom('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _227966)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _227966)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _227966)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _227966)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _227966)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _227966)
   Call: (270) [system] '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0)==[_244706, _244712]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _227966)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _227966)
   Call: (270) [system] is_list('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _227966)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _227966)
   Call: (270) [system] string('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _227966)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _227966)
   Call: (270) [system] compound('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
   Exit: (270) [system] compound('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _254908, _254910)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT', [";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0], _258650)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0], _258650)
   Call: (271) [apply] apply:maplist_([";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0], _258650, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0], [_261468|_261470], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _261468)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _261468)
   Call: (273) [system] var(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _261468)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", '$VAR'(_266114))
   Call: (273) [system] atom(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _261468)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _261468)
   Call: (273) [system] ";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],"==true
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _261468)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _261468)
   Call: (273) [system] ";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],"==false
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _261468)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _261468)
   Call: (273) [system] ";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],"==[_275394, _275400]
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _261468)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _261468)
   Call: (273) [system] is_list(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _261468)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _261468)
   Call: (273) [system] string(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],")
   Exit: (273) [system] string(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _261468)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _261468)
   Call: (273) [system] compound(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _261468)
^  Unify: (272) [user] mfix_vars1(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _261468)
^  Call: (273) [user] symbol(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],")
^  Unify: (273) [user] symbol(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],")
   Call: (274) [system] atom(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],")
   Fail: (274) [system] atom(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],")
^  Fail: (273) [user] symbol(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],")
^  Redo: (272) [user] mfix_vars1(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _261468)
   Call: (273) [system] ";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],"=_261468
   Exit: (273) [system] ";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],"=";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],"
^  Exit: (272) [user] mfix_vars1(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", ";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],")
   Call: (272) [apply] apply:maplist_([1796, 0], _261470, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1796, 0], [_299466|_299468], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1796, _299466)
^  Unify: (273) [user] mfix_vars1(1796, _299466)
   Call: (274) [system] var(1796)
^  Redo: (273) [user] mfix_vars1(1796, _299466)
^  Unify: (273) [user] mfix_vars1(1796, '$VAR'(_304112))
   Call: (274) [system] atom(1796)
^  Redo: (273) [user] mfix_vars1(1796, _299466)
^  Unify: (273) [user] mfix_vars1(1796, _299466)
   Call: (274) [system] 1796==true
^  Redo: (273) [user] mfix_vars1(1796, _299466)
^  Unify: (273) [user] mfix_vars1(1796, _299466)
   Call: (274) [system] 1796==false
^  Redo: (273) [user] mfix_vars1(1796, _299466)
^  Unify: (273) [user] mfix_vars1(1796, _299466)
   Call: (274) [system] 1796==[_313392, _313398]
^  Redo: (273) [user] mfix_vars1(1796, _299466)
^  Unify: (273) [user] mfix_vars1(1796, _299466)
   Call: (274) [system] is_list(1796)
^  Redo: (273) [user] mfix_vars1(1796, _299466)
^  Unify: (273) [user] mfix_vars1(1796, _299466)
   Call: (274) [system] string(1796)
^  Redo: (273) [user] mfix_vars1(1796, _299466)
^  Unify: (273) [user] mfix_vars1(1796, _299466)
   Call: (274) [system] compound(1796)
^  Redo: (273) [user] mfix_vars1(1796, _299466)
^  Unify: (273) [user] mfix_vars1(1796, _299466)
^  Call: (274) [user] symbol(1796)
^  Unify: (274) [user] symbol(1796)
   Call: (275) [system] atom(1796)
   Fail: (275) [system] atom(1796)
^  Fail: (274) [user] symbol(1796)
^  Redo: (273) [user] mfix_vars1(1796, _299466)
   Call: (274) [system] 1796=_299466
   Exit: (274) [system] 1796=1796
^  Exit: (273) [user] mfix_vars1(1796, 1796)
   Call: (273) [apply] apply:maplist_([0], _299468, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_333792|_333794], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _333792)
^  Unify: (274) [user] mfix_vars1(0, _333792)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _333792)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_338438))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _333792)
^  Unify: (274) [user] mfix_vars1(0, _333792)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _333792)
^  Unify: (274) [user] mfix_vars1(0, _333792)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _333792)
^  Unify: (274) [user] mfix_vars1(0, _333792)
   Call: (275) [system] 0==[_347718, _347724]
^  Redo: (274) [user] mfix_vars1(0, _333792)
^  Unify: (274) [user] mfix_vars1(0, _333792)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _333792)
^  Unify: (274) [user] mfix_vars1(0, _333792)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _333792)
^  Unify: (274) [user] mfix_vars1(0, _333792)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _333792)
^  Unify: (274) [user] mfix_vars1(0, _333792)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _333792)
   Call: (275) [system] 0=_333792
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _333794, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1796, 0], [1796, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0], [";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0], [";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0])
   Call: (270) [system] compound_name_arguments(_227966, '$COMMENT', [";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT', [";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0)\=@='$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _222380)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _383966))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _383966))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _383966))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _383966))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _383966)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _383966)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _389552))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _389552))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _389552)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _389552)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _389552)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0)\=@='$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _383966)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _216768))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _216768))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _216768))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _216768))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _216768)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _216768)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _411872))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _411872))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _411872)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _411872)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _411872)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0)))
   Call: (267) [system] '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0)\=@='$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _216768)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0)))
   Call: (261) [system] '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0)\=@='$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _440650, [], _440652)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _440650, [], _440652)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _440650, [], _440652)
   Call: (258) [system] atom('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _440650, [], _440652)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _440650, [], _440652)
   Call: (258) [system] compound('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
   Exit: (258) [system] compound('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), _449966, _449968)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT', [";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0])
^  Call: (258) [user] subst_vars([";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0], _451852, [], _440652)
^  Unify: (258) [user] subst_vars([";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0], [";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0], [], [])
   Call: (259) [system] var([";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0])
^  Redo: (258) [user] subst_vars([";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0], _451852, [], _440652)
^  Unify: (258) [user] subst_vars([";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0], [_455588|_455590], [], _440652)
^  Call: (259) [user] subst_vars(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _455588, [], _456528)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", ";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", [], [])
   Call: (260) [system] var(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _455588, [], _456528)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _455588, [], _456528)
   Call: (260) [system] atom(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _455588, [], _456528)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _455588, [], _456528)
   Call: (260) [system] compound(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],")
^  Redo: (259) [user] subst_vars(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", _455588, [], _456528)
^  Unify: (259) [user] subst_vars(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", ";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", [], [])
^  Exit: (259) [user] subst_vars(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", ";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", [], [])
^  Call: (259) [user] subst_vars([1796, 0], _455590, [], _440652)
^  Unify: (259) [user] subst_vars([1796, 0], [1796, 0], [], [])
   Call: (260) [system] var([1796, 0])
^  Redo: (259) [user] subst_vars([1796, 0], _455590, [], _440652)
^  Unify: (259) [user] subst_vars([1796, 0], [_471460|_471462], [], _440652)
^  Call: (260) [user] subst_vars(1796, _471460, [], _472400)
^  Unify: (260) [user] subst_vars(1796, 1796, [], [])
   Call: (261) [system] var(1796)
^  Redo: (260) [user] subst_vars(1796, _471460, [], _472400)
^  Unify: (260) [user] subst_vars(1796, _471460, [], _472400)
   Call: (261) [system] atom(1796)
^  Redo: (260) [user] subst_vars(1796, _471460, [], _472400)
^  Unify: (260) [user] subst_vars(1796, _471460, [], _472400)
   Call: (261) [system] compound(1796)
^  Redo: (260) [user] subst_vars(1796, _471460, [], _472400)
^  Unify: (260) [user] subst_vars(1796, 1796, [], [])
^  Exit: (260) [user] subst_vars(1796, 1796, [], [])
^  Call: (260) [user] subst_vars([0], _471462, [], _440652)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _471462, [], _440652)
^  Unify: (260) [user] subst_vars([0], [_487332|_487334], [], _440652)
^  Call: (261) [user] subst_vars(0, _487332, [], _488272)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _487332, [], _488272)
^  Unify: (261) [user] subst_vars(0, _487332, [], _488272)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _487332, [], _488272)
^  Unify: (261) [user] subst_vars(0, _487332, [], _488272)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _487332, [], _488272)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _487334, [], _440652)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _487334, [], _440652)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1796, 0], [1796, 0], [], [])
^  Exit: (258) [user] subst_vars([";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0], [";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0], [], [])
   Call: (258) [system] compound_name_arguments(_440650, '$COMMENT', [";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT', [";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), [], [])
   Call: (257) [system] _510690=metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;         vec![expr!(\"Error\" ({SumOp{}} {Number::Integer(1)} {Number::Integer(2)}) ({SumOp{}} {Number::Integer(1)} {SumOp{}}))],", 1796, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1797, 0, 64048, '$COMMENT'(";;     ]));", 1797, 0), '$stream_position'(64048, 1797, 0, 64082)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1797, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1797, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";;     ]));", 1797, 0), _46110))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     ]));", 1797, 0), _46110))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";;     ]));", 1797, 0), _46110)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     ]));", 1797, 0), _46110)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";;     ]));", 1797, 0), _46110)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";;     ]));", 1797, 0), _46110)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";;     ]));", 1797, 0), _51722))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1797, 0), _51722))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1797, 0), _51722))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1797, 0), _51722))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1797, 0), _51722)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1797, 0), _51722)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";;     ]));", 1797, 0), _57308))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     ]));", 1797, 0), _57308))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";;     ]));", 1797, 0), _57308)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     ]));", 1797, 0), _57308)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1797, 0), _57308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1797, 0), _57308)
   Call: (270) [system] var('$COMMENT'(";;     ]));", 1797, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1797, 0), _57308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1797, 0), '$VAR'(_64768))
   Call: (270) [system] atom('$COMMENT'(";;     ]));", 1797, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1797, 0), _57308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1797, 0), _57308)
   Call: (270) [system] '$COMMENT'(";;     ]));", 1797, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1797, 0), _57308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1797, 0), _57308)
   Call: (270) [system] '$COMMENT'(";;     ]));", 1797, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1797, 0), _57308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1797, 0), _57308)
   Call: (270) [system] '$COMMENT'(";;     ]));", 1797, 0)==[_74048, _74054]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1797, 0), _57308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1797, 0), _57308)
   Call: (270) [system] is_list('$COMMENT'(";;     ]));", 1797, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1797, 0), _57308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1797, 0), _57308)
   Call: (270) [system] string('$COMMENT'(";;     ]));", 1797, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1797, 0), _57308)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1797, 0), _57308)
   Call: (270) [system] compound('$COMMENT'(";;     ]));", 1797, 0))
   Exit: (270) [system] compound('$COMMENT'(";;     ]));", 1797, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1797, 0), _84250, _84252)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1797, 0), '$COMMENT', [";;     ]));", 1797, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";;     ]));", 1797, 0], _87992)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";;     ]));", 1797, 0], _87992)
   Call: (271) [apply] apply:maplist_([";;     ]));", 1797, 0], _87992, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";;     ]));", 1797, 0], [_90810|_90812], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";;     ]));", _90810)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _90810)
   Call: (273) [system] var(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _90810)
^  Unify: (272) [user] mfix_vars1(";;     ]));", '$VAR'(_95456))
   Call: (273) [system] atom(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _90810)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _90810)
   Call: (273) [system] ";;     ]));"==true
^  Redo: (272) [user] mfix_vars1(";;     ]));", _90810)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _90810)
   Call: (273) [system] ";;     ]));"==false
^  Redo: (272) [user] mfix_vars1(";;     ]));", _90810)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _90810)
   Call: (273) [system] ";;     ]));"==[_104736, _104742]
^  Redo: (272) [user] mfix_vars1(";;     ]));", _90810)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _90810)
   Call: (273) [system] is_list(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _90810)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _90810)
   Call: (273) [system] string(";;     ]));")
   Exit: (273) [system] string(";;     ]));")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";;     ]));", _90810)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _90810)
   Call: (273) [system] compound(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _90810)
^  Unify: (272) [user] mfix_vars1(";;     ]));", _90810)
^  Call: (273) [user] symbol(";;     ]));")
^  Unify: (273) [user] symbol(";;     ]));")
   Call: (274) [system] atom(";;     ]));")
   Fail: (274) [system] atom(";;     ]));")
^  Fail: (273) [user] symbol(";;     ]));")
^  Redo: (272) [user] mfix_vars1(";;     ]));", _90810)
   Call: (273) [system] ";;     ]));"=_90810
   Exit: (273) [system] ";;     ]));"=";;     ]));"
^  Exit: (272) [user] mfix_vars1(";;     ]));", ";;     ]));")
   Call: (272) [apply] apply:maplist_([1797, 0], _90812, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1797, 0], [_128808|_128810], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1797, _128808)
^  Unify: (273) [user] mfix_vars1(1797, _128808)
   Call: (274) [system] var(1797)
^  Redo: (273) [user] mfix_vars1(1797, _128808)
^  Unify: (273) [user] mfix_vars1(1797, '$VAR'(_133454))
   Call: (274) [system] atom(1797)
^  Redo: (273) [user] mfix_vars1(1797, _128808)
^  Unify: (273) [user] mfix_vars1(1797, _128808)
   Call: (274) [system] 1797==true
^  Redo: (273) [user] mfix_vars1(1797, _128808)
^  Unify: (273) [user] mfix_vars1(1797, _128808)
   Call: (274) [system] 1797==false
^  Redo: (273) [user] mfix_vars1(1797, _128808)
^  Unify: (273) [user] mfix_vars1(1797, _128808)
   Call: (274) [system] 1797==[_142734, _142740]
^  Redo: (273) [user] mfix_vars1(1797, _128808)
^  Unify: (273) [user] mfix_vars1(1797, _128808)
   Call: (274) [system] is_list(1797)
^  Redo: (273) [user] mfix_vars1(1797, _128808)
^  Unify: (273) [user] mfix_vars1(1797, _128808)
   Call: (274) [system] string(1797)
^  Redo: (273) [user] mfix_vars1(1797, _128808)
^  Unify: (273) [user] mfix_vars1(1797, _128808)
   Call: (274) [system] compound(1797)
^  Redo: (273) [user] mfix_vars1(1797, _128808)
^  Unify: (273) [user] mfix_vars1(1797, _128808)
^  Call: (274) [user] symbol(1797)
^  Unify: (274) [user] symbol(1797)
   Call: (275) [system] atom(1797)
   Fail: (275) [system] atom(1797)
^  Fail: (274) [user] symbol(1797)
^  Redo: (273) [user] mfix_vars1(1797, _128808)
   Call: (274) [system] 1797=_128808
   Exit: (274) [system] 1797=1797
^  Exit: (273) [user] mfix_vars1(1797, 1797)
   Call: (273) [apply] apply:maplist_([0], _128810, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_163134|_163136], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _163134)
^  Unify: (274) [user] mfix_vars1(0, _163134)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _163134)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_167780))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _163134)
^  Unify: (274) [user] mfix_vars1(0, _163134)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _163134)
^  Unify: (274) [user] mfix_vars1(0, _163134)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _163134)
^  Unify: (274) [user] mfix_vars1(0, _163134)
   Call: (275) [system] 0==[_177060, _177066]
^  Redo: (274) [user] mfix_vars1(0, _163134)
^  Unify: (274) [user] mfix_vars1(0, _163134)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _163134)
^  Unify: (274) [user] mfix_vars1(0, _163134)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _163134)
^  Unify: (274) [user] mfix_vars1(0, _163134)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _163134)
^  Unify: (274) [user] mfix_vars1(0, _163134)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _163134)
   Call: (275) [system] 0=_163134
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _163136, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1797, 0], [1797, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";;     ]));", 1797, 0], [";;     ]));", 1797, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";;     ]));", 1797, 0], [";;     ]));", 1797, 0])
   Call: (270) [system] compound_name_arguments(_57308, '$COMMENT', [";;     ]));", 1797, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1797, 0), '$COMMENT', [";;     ]));", 1797, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0)))
   Call: (267) [system] '$COMMENT'(";;     ]));", 1797, 0)\=@='$COMMENT'(";;     ]));", 1797, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1797, 0), _51722)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";;     ]));", 1797, 0), _213308))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1797, 0), _213308))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1797, 0), _213308))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1797, 0), _213308))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1797, 0), _213308)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1797, 0), _213308)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";;     ]));", 1797, 0), _218894))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     ]));", 1797, 0), _218894))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";;     ]));", 1797, 0), _218894)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     ]));", 1797, 0), _218894)
^  Call: (269) [user] cons_to_c('$COMMENT'(";;     ]));", 1797, 0), _218894)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0)))
   Call: (267) [system] '$COMMENT'(";;     ]));", 1797, 0)\=@='$COMMENT'(";;     ]));", 1797, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1797, 0), _213308)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";;     ]));", 1797, 0), _46110))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1797, 0), _46110))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1797, 0), _46110))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1797, 0), _46110))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1797, 0), _46110)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1797, 0), _46110)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";;     ]));", 1797, 0), _241214))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     ]));", 1797, 0), _241214))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";;     ]));", 1797, 0), _241214)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     ]));", 1797, 0), _241214)
^  Call: (269) [user] cons_to_l('$COMMENT'(";;     ]));", 1797, 0), _241214)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0)))
   Call: (267) [system] '$COMMENT'(";;     ]));", 1797, 0)\=@='$COMMENT'(";;     ]));", 1797, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1797, 0), _46110)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0)))
   Call: (261) [system] '$COMMENT'(";;     ]));", 1797, 0)\=@='$COMMENT'(";;     ]));", 1797, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1797, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1797, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1797, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1797, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1797, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1797, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";;     ]));", 1797, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1797, 0), _269992, [], _269994)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";;     ]));", 1797, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1797, 0), _269992, [], _269994)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1797, 0), _269992, [], _269994)
   Call: (258) [system] atom('$COMMENT'(";;     ]));", 1797, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1797, 0), _269992, [], _269994)
^  Unify: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1797, 0), _269992, [], _269994)
   Call: (258) [system] compound('$COMMENT'(";;     ]));", 1797, 0))
   Exit: (258) [system] compound('$COMMENT'(";;     ]));", 1797, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1797, 0), _279308, _279310)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1797, 0), '$COMMENT', [";;     ]));", 1797, 0])
^  Call: (258) [user] subst_vars([";;     ]));", 1797, 0], _281194, [], _269994)
^  Unify: (258) [user] subst_vars([";;     ]));", 1797, 0], [";;     ]));", 1797, 0], [], [])
   Call: (259) [system] var([";;     ]));", 1797, 0])
^  Redo: (258) [user] subst_vars([";;     ]));", 1797, 0], _281194, [], _269994)
^  Unify: (258) [user] subst_vars([";;     ]));", 1797, 0], [_284930|_284932], [], _269994)
^  Call: (259) [user] subst_vars(";;     ]));", _284930, [], _285870)
^  Unify: (259) [user] subst_vars(";;     ]));", ";;     ]));", [], [])
   Call: (260) [system] var(";;     ]));")
^  Redo: (259) [user] subst_vars(";;     ]));", _284930, [], _285870)
^  Unify: (259) [user] subst_vars(";;     ]));", _284930, [], _285870)
   Call: (260) [system] atom(";;     ]));")
^  Redo: (259) [user] subst_vars(";;     ]));", _284930, [], _285870)
^  Unify: (259) [user] subst_vars(";;     ]));", _284930, [], _285870)
   Call: (260) [system] compound(";;     ]));")
^  Redo: (259) [user] subst_vars(";;     ]));", _284930, [], _285870)
^  Unify: (259) [user] subst_vars(";;     ]));", ";;     ]));", [], [])
^  Exit: (259) [user] subst_vars(";;     ]));", ";;     ]));", [], [])
^  Call: (259) [user] subst_vars([1797, 0], _284932, [], _269994)
^  Unify: (259) [user] subst_vars([1797, 0], [1797, 0], [], [])
   Call: (260) [system] var([1797, 0])
^  Redo: (259) [user] subst_vars([1797, 0], _284932, [], _269994)
^  Unify: (259) [user] subst_vars([1797, 0], [_300802|_300804], [], _269994)
^  Call: (260) [user] subst_vars(1797, _300802, [], _301742)
^  Unify: (260) [user] subst_vars(1797, 1797, [], [])
   Call: (261) [system] var(1797)
^  Redo: (260) [user] subst_vars(1797, _300802, [], _301742)
^  Unify: (260) [user] subst_vars(1797, _300802, [], _301742)
   Call: (261) [system] atom(1797)
^  Redo: (260) [user] subst_vars(1797, _300802, [], _301742)
^  Unify: (260) [user] subst_vars(1797, _300802, [], _301742)
   Call: (261) [system] compound(1797)
^  Redo: (260) [user] subst_vars(1797, _300802, [], _301742)
^  Unify: (260) [user] subst_vars(1797, 1797, [], [])
^  Exit: (260) [user] subst_vars(1797, 1797, [], [])
^  Call: (260) [user] subst_vars([0], _300804, [], _269994)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _300804, [], _269994)
^  Unify: (260) [user] subst_vars([0], [_316674|_316676], [], _269994)
^  Call: (261) [user] subst_vars(0, _316674, [], _317614)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _316674, [], _317614)
^  Unify: (261) [user] subst_vars(0, _316674, [], _317614)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _316674, [], _317614)
^  Unify: (261) [user] subst_vars(0, _316674, [], _317614)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _316674, [], _317614)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _316676, [], _269994)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _316676, [], _269994)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1797, 0], [1797, 0], [], [])
^  Exit: (258) [user] subst_vars([";;     ]));", 1797, 0], [";;     ]));", 1797, 0], [], [])
   Call: (258) [system] compound_name_arguments(_269992, '$COMMENT', [";;     ]));", 1797, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";;     ]));", 1797, 0), '$COMMENT', [";;     ]));", 1797, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";;     ]));", 1797, 0), '$COMMENT'(";;     ]));", 1797, 0), [], [])
   Call: (257) [system] _340032=metta_file_buffer(+, '$COMMENT'(";;     ]));", 1797, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";;     ]));", 1797, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";;     ]));", 1797, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     ]));", 1797, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";;     ]));", 1797, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1797, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1797, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1797, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";;     ]));", 1797, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1798, 0, 64060, '$COMMENT'(";; }", 1798, 0), '$stream_position'(64060, 1798, 0, 64094)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1798, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1798, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; }", 1798, 0), _392748))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1798, 0), _392748))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; }", 1798, 0), _392748)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1798, 0), _392748)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1798, 0), _392748)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1798, 0), _392748)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; }", 1798, 0), _398360))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1798, 0), _398360))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1798, 0), _398360))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1798, 0), _398360))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1798, 0), _398360)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1798, 0), _398360)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; }", 1798, 0), _403946))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1798, 0), _403946))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; }", 1798, 0), _403946)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1798, 0), _403946)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; }", 1798, 0), _403946)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1798, 0), _403946)
   Call: (270) [system] var('$COMMENT'(";; }", 1798, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1798, 0), _403946)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1798, 0), '$VAR'(_411406))
   Call: (270) [system] atom('$COMMENT'(";; }", 1798, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1798, 0), _403946)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1798, 0), _403946)
   Call: (270) [system] '$COMMENT'(";; }", 1798, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1798, 0), _403946)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1798, 0), _403946)
   Call: (270) [system] '$COMMENT'(";; }", 1798, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1798, 0), _403946)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1798, 0), _403946)
   Call: (270) [system] '$COMMENT'(";; }", 1798, 0)==[_420686, _420692]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1798, 0), _403946)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1798, 0), _403946)
   Call: (270) [system] is_list('$COMMENT'(";; }", 1798, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1798, 0), _403946)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1798, 0), _403946)
   Call: (270) [system] string('$COMMENT'(";; }", 1798, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; }", 1798, 0), _403946)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; }", 1798, 0), _403946)
   Call: (270) [system] compound('$COMMENT'(";; }", 1798, 0))
   Exit: (270) [system] compound('$COMMENT'(";; }", 1798, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1798, 0), _430888, _430890)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1798, 0), '$COMMENT', [";; }", 1798, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; }", 1798, 0], _434630)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1798, 0], _434630)
   Call: (271) [apply] apply:maplist_([";; }", 1798, 0], _434630, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; }", 1798, 0], [_437448|_437450], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; }", _437448)
^  Unify: (272) [user] mfix_vars1(";; }", _437448)
   Call: (273) [system] var(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _437448)
^  Unify: (272) [user] mfix_vars1(";; }", '$VAR'(_442094))
   Call: (273) [system] atom(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _437448)
^  Unify: (272) [user] mfix_vars1(";; }", _437448)
   Call: (273) [system] ";; }"==true
^  Redo: (272) [user] mfix_vars1(";; }", _437448)
^  Unify: (272) [user] mfix_vars1(";; }", _437448)
   Call: (273) [system] ";; }"==false
^  Redo: (272) [user] mfix_vars1(";; }", _437448)
^  Unify: (272) [user] mfix_vars1(";; }", _437448)
   Call: (273) [system] ";; }"==[_451374, _451380]
^  Redo: (272) [user] mfix_vars1(";; }", _437448)
^  Unify: (272) [user] mfix_vars1(";; }", _437448)
   Call: (273) [system] is_list(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _437448)
^  Unify: (272) [user] mfix_vars1(";; }", _437448)
   Call: (273) [system] string(";; }")
   Exit: (273) [system] string(";; }")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; }", _437448)
^  Unify: (272) [user] mfix_vars1(";; }", _437448)
   Call: (273) [system] compound(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _437448)
^  Unify: (272) [user] mfix_vars1(";; }", _437448)
^  Call: (273) [user] symbol(";; }")
^  Unify: (273) [user] symbol(";; }")
   Call: (274) [system] atom(";; }")
   Fail: (274) [system] atom(";; }")
^  Fail: (273) [user] symbol(";; }")
^  Redo: (272) [user] mfix_vars1(";; }", _437448)
   Call: (273) [system] ";; }"=_437448
   Exit: (273) [system] ";; }"=";; }"
^  Exit: (272) [user] mfix_vars1(";; }", ";; }")
   Call: (272) [apply] apply:maplist_([1798, 0], _437450, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1798, 0], [_475446|_475448], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1798, _475446)
^  Unify: (273) [user] mfix_vars1(1798, _475446)
   Call: (274) [system] var(1798)
^  Redo: (273) [user] mfix_vars1(1798, _475446)
^  Unify: (273) [user] mfix_vars1(1798, '$VAR'(_480092))
   Call: (274) [system] atom(1798)
^  Redo: (273) [user] mfix_vars1(1798, _475446)
^  Unify: (273) [user] mfix_vars1(1798, _475446)
   Call: (274) [system] 1798==true
^  Redo: (273) [user] mfix_vars1(1798, _475446)
^  Unify: (273) [user] mfix_vars1(1798, _475446)
   Call: (274) [system] 1798==false
^  Redo: (273) [user] mfix_vars1(1798, _475446)
^  Unify: (273) [user] mfix_vars1(1798, _475446)
   Call: (274) [system] 1798==[_489372, _489378]
^  Redo: (273) [user] mfix_vars1(1798, _475446)
^  Unify: (273) [user] mfix_vars1(1798, _475446)
   Call: (274) [system] is_list(1798)
^  Redo: (273) [user] mfix_vars1(1798, _475446)
^  Unify: (273) [user] mfix_vars1(1798, _475446)
   Call: (274) [system] string(1798)
^  Redo: (273) [user] mfix_vars1(1798, _475446)
^  Unify: (273) [user] mfix_vars1(1798, _475446)
   Call: (274) [system] compound(1798)
^  Redo: (273) [user] mfix_vars1(1798, _475446)
^  Unify: (273) [user] mfix_vars1(1798, _475446)
^  Call: (274) [user] symbol(1798)
^  Unify: (274) [user] symbol(1798)
   Call: (275) [system] atom(1798)
   Fail: (275) [system] atom(1798)
^  Fail: (274) [user] symbol(1798)
^  Redo: (273) [user] mfix_vars1(1798, _475446)
   Call: (274) [system] 1798=_475446
   Exit: (274) [system] 1798=1798
^  Exit: (273) [user] mfix_vars1(1798, 1798)
   Call: (273) [apply] apply:maplist_([0], _475448, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_509772|_509774], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _509772)
^  Unify: (274) [user] mfix_vars1(0, _509772)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _509772)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_514418))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _509772)
^  Unify: (274) [user] mfix_vars1(0, _509772)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _509772)
^  Unify: (274) [user] mfix_vars1(0, _509772)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _509772)
^  Unify: (274) [user] mfix_vars1(0, _509772)
   Call: (275) [system] 0==[_6042, _6048]
^  Redo: (274) [user] mfix_vars1(0, _6034)
^  Unify: (274) [user] mfix_vars1(0, _6034)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _6034)
^  Unify: (274) [user] mfix_vars1(0, _6034)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _6034)
^  Unify: (274) [user] mfix_vars1(0, _6034)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _6034)
^  Unify: (274) [user] mfix_vars1(0, _6034)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _6034)
   Call: (275) [system] 0=_6034
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _6036, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1798, 0], [1798, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; }", 1798, 0], [";; }", 1798, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; }", 1798, 0], [";; }", 1798, 0])
   Call: (270) [system] compound_name_arguments(_5976, '$COMMENT', [";; }", 1798, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; }", 1798, 0), '$COMMENT', [";; }", 1798, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1798, 0)\=@='$COMMENT'(";; }", 1798, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1798, 0), _5962)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; }", 1798, 0), _42068))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1798, 0), _42068))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1798, 0), _42068))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1798, 0), _42068))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1798, 0), _42068)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1798, 0), _42068)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; }", 1798, 0), _47654))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1798, 0), _47654))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; }", 1798, 0), _47654)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1798, 0), _47654)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; }", 1798, 0), _47654)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1798, 0)\=@='$COMMENT'(";; }", 1798, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1798, 0), _42068)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; }", 1798, 0), _5942))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1798, 0), _5942))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1798, 0), _5942))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1798, 0), _5942))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1798, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1798, 0), _5942)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; }", 1798, 0), _69974))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1798, 0), _69974))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; }", 1798, 0), _69974)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1798, 0), _69974)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; }", 1798, 0), _69974)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0)))
   Call: (267) [system] '$COMMENT'(";; }", 1798, 0)\=@='$COMMENT'(";; }", 1798, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1798, 0), _5942)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0)))
   Call: (261) [system] '$COMMENT'(";; }", 1798, 0)\=@='$COMMENT'(";; }", 1798, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1798, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1798, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1798, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1798, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; }", 1798, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; }", 1798, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; }", 1798, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; }", 1798, 0), _98752, [], _98754)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; }", 1798, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1798, 0), _98752, [], _98754)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1798, 0), _98752, [], _98754)
   Call: (258) [system] atom('$COMMENT'(";; }", 1798, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; }", 1798, 0), _98752, [], _98754)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; }", 1798, 0), _98752, [], _98754)
   Call: (258) [system] compound('$COMMENT'(";; }", 1798, 0))
   Exit: (258) [system] compound('$COMMENT'(";; }", 1798, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1798, 0), _108068, _108070)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1798, 0), '$COMMENT', [";; }", 1798, 0])
^  Call: (258) [user] subst_vars([";; }", 1798, 0], _109954, [], _98754)
^  Unify: (258) [user] subst_vars([";; }", 1798, 0], [";; }", 1798, 0], [], [])
   Call: (259) [system] var([";; }", 1798, 0])
^  Redo: (258) [user] subst_vars([";; }", 1798, 0], _109954, [], _98754)
^  Unify: (258) [user] subst_vars([";; }", 1798, 0], [_113690|_113692], [], _98754)
^  Call: (259) [user] subst_vars(";; }", _113690, [], _114630)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
   Call: (260) [system] var(";; }")
^  Redo: (259) [user] subst_vars(";; }", _113690, [], _114630)
^  Unify: (259) [user] subst_vars(";; }", _113690, [], _114630)
   Call: (260) [system] atom(";; }")
^  Redo: (259) [user] subst_vars(";; }", _113690, [], _114630)
^  Unify: (259) [user] subst_vars(";; }", _113690, [], _114630)
   Call: (260) [system] compound(";; }")
^  Redo: (259) [user] subst_vars(";; }", _113690, [], _114630)
^  Unify: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Exit: (259) [user] subst_vars(";; }", ";; }", [], [])
^  Call: (259) [user] subst_vars([1798, 0], _113692, [], _98754)
^  Unify: (259) [user] subst_vars([1798, 0], [1798, 0], [], [])
   Call: (260) [system] var([1798, 0])
^  Redo: (259) [user] subst_vars([1798, 0], _113692, [], _98754)
^  Unify: (259) [user] subst_vars([1798, 0], [_129562|_129564], [], _98754)
^  Call: (260) [user] subst_vars(1798, _129562, [], _130502)
^  Unify: (260) [user] subst_vars(1798, 1798, [], [])
   Call: (261) [system] var(1798)
^  Redo: (260) [user] subst_vars(1798, _129562, [], _130502)
^  Unify: (260) [user] subst_vars(1798, _129562, [], _130502)
   Call: (261) [system] atom(1798)
^  Redo: (260) [user] subst_vars(1798, _129562, [], _130502)
^  Unify: (260) [user] subst_vars(1798, _129562, [], _130502)
   Call: (261) [system] compound(1798)
^  Redo: (260) [user] subst_vars(1798, _129562, [], _130502)
^  Unify: (260) [user] subst_vars(1798, 1798, [], [])
^  Exit: (260) [user] subst_vars(1798, 1798, [], [])
^  Call: (260) [user] subst_vars([0], _129564, [], _98754)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _129564, [], _98754)
^  Unify: (260) [user] subst_vars([0], [_145434|_145436], [], _98754)
^  Call: (261) [user] subst_vars(0, _145434, [], _146374)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _145434, [], _146374)
^  Unify: (261) [user] subst_vars(0, _145434, [], _146374)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _145434, [], _146374)
^  Unify: (261) [user] subst_vars(0, _145434, [], _146374)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _145434, [], _146374)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _145436, [], _98754)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _145436, [], _98754)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1798, 0], [1798, 0], [], [])
^  Exit: (258) [user] subst_vars([";; }", 1798, 0], [";; }", 1798, 0], [], [])
   Call: (258) [system] compound_name_arguments(_98752, '$COMMENT', [";; }", 1798, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; }", 1798, 0), '$COMMENT', [";; }", 1798, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; }", 1798, 0), '$COMMENT'(";; }", 1798, 0), [], [])
   Call: (257) [system] _168792=metta_file_buffer(+, '$COMMENT'(";; }", 1798, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; }", 1798, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; }", 1798, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1798, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; }", 1798, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1798, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1798, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1798, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; }", 1798, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1800, 0, 64066, '$COMMENT'(";; Converted:", 1800, 0), '$stream_position'(64066, 1800, 0, 64100)))
^  Call: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1800, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1800, 0), _5908)
^  Call: (261) [user] once(call(untyped_to_metta, '$COMMENT'(";; Converted:", 1800, 0), _221510))
^  Unify: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1800, 0), _221510))
^  Call: (262) [user] call(untyped_to_metta, '$COMMENT'(";; Converted:", 1800, 0), _221510)
^  Unify: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1800, 0), _221510)
^  Call: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1800, 0), _221510)
^  Unify: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1800, 0), _221510)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'(";; Converted:", 1800, 0), _227122))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1800, 0), _227122))
^  Call: (265) [user] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1800, 0), _227122))
^  Unify: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1800, 0), _227122))
^  Call: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1800, 0), _227122)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1800, 0), _227122)
^  Call: (267) [user] once(call(mfix_vars1, '$COMMENT'(";; Converted:", 1800, 0), _232708))
^  Unify: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1800, 0), _232708))
^  Call: (268) [user] call(mfix_vars1, '$COMMENT'(";; Converted:", 1800, 0), _232708)
^  Unify: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1800, 0), _232708)
^  Call: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1800, 0), _232708)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1800, 0), _232708)
   Call: (270) [system] var('$COMMENT'(";; Converted:", 1800, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1800, 0), _232708)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1800, 0), '$VAR'(_240168))
   Call: (270) [system] atom('$COMMENT'(";; Converted:", 1800, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1800, 0), _232708)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1800, 0), _232708)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1800, 0)==true
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1800, 0), _232708)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1800, 0), _232708)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1800, 0)==false
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1800, 0), _232708)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1800, 0), _232708)
   Call: (270) [system] '$COMMENT'(";; Converted:", 1800, 0)==[_249448, _249454]
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1800, 0), _232708)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1800, 0), _232708)
   Call: (270) [system] is_list('$COMMENT'(";; Converted:", 1800, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1800, 0), _232708)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1800, 0), _232708)
   Call: (270) [system] string('$COMMENT'(";; Converted:", 1800, 0))
^  Redo: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1800, 0), _232708)
^  Unify: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1800, 0), _232708)
   Call: (270) [system] compound('$COMMENT'(";; Converted:", 1800, 0))
   Exit: (270) [system] compound('$COMMENT'(";; Converted:", 1800, 0))
   Call: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1800, 0), _259650, _259652)
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1800, 0), '$COMMENT', [";; Converted:", 1800, 0])
   Call: (270) [system] '$COMMENT'\=='$VAR'
   Exit: (270) [system] '$COMMENT'\=='$VAR'
^  Call: (270) [user] apply:maplist(mfix_vars1, [";; Converted:", 1800, 0], _263392)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1800, 0], _263392)
   Call: (271) [apply] apply:maplist_([";; Converted:", 1800, 0], _263392, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([";; Converted:", 1800, 0], [_266210|_266212], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(";; Converted:", _266210)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _266210)
   Call: (273) [system] var(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _266210)
^  Unify: (272) [user] mfix_vars1(";; Converted:", '$VAR'(_270856))
   Call: (273) [system] atom(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _266210)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _266210)
   Call: (273) [system] ";; Converted:"==true
^  Redo: (272) [user] mfix_vars1(";; Converted:", _266210)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _266210)
   Call: (273) [system] ";; Converted:"==false
^  Redo: (272) [user] mfix_vars1(";; Converted:", _266210)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _266210)
   Call: (273) [system] ";; Converted:"==[_280136, _280142]
^  Redo: (272) [user] mfix_vars1(";; Converted:", _266210)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _266210)
   Call: (273) [system] is_list(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _266210)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _266210)
   Call: (273) [system] string(";; Converted:")
   Exit: (273) [system] string(";; Converted:")
^  Call: (273) [user] string_to_syms
^  Unify: (273) [user] string_to_syms
   Call: (274) [system] fail
^  Redo: (272) [user] mfix_vars1(";; Converted:", _266210)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _266210)
   Call: (273) [system] compound(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _266210)
^  Unify: (272) [user] mfix_vars1(";; Converted:", _266210)
^  Call: (273) [user] symbol(";; Converted:")
^  Unify: (273) [user] symbol(";; Converted:")
   Call: (274) [system] atom(";; Converted:")
   Fail: (274) [system] atom(";; Converted:")
^  Fail: (273) [user] symbol(";; Converted:")
^  Redo: (272) [user] mfix_vars1(";; Converted:", _266210)
   Call: (273) [system] ";; Converted:"=_266210
   Exit: (273) [system] ";; Converted:"=";; Converted:"
^  Exit: (272) [user] mfix_vars1(";; Converted:", ";; Converted:")
   Call: (272) [apply] apply:maplist_([1800, 0], _266212, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_([1800, 0], [_304208|_304210], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1(1800, _304208)
^  Unify: (273) [user] mfix_vars1(1800, _304208)
   Call: (274) [system] var(1800)
^  Redo: (273) [user] mfix_vars1(1800, _304208)
^  Unify: (273) [user] mfix_vars1(1800, '$VAR'(_308854))
   Call: (274) [system] atom(1800)
^  Redo: (273) [user] mfix_vars1(1800, _304208)
^  Unify: (273) [user] mfix_vars1(1800, _304208)
   Call: (274) [system] 1800==true
^  Redo: (273) [user] mfix_vars1(1800, _304208)
^  Unify: (273) [user] mfix_vars1(1800, _304208)
   Call: (274) [system] 1800==false
^  Redo: (273) [user] mfix_vars1(1800, _304208)
^  Unify: (273) [user] mfix_vars1(1800, _304208)
   Call: (274) [system] 1800==[_318134, _318140]
^  Redo: (273) [user] mfix_vars1(1800, _304208)
^  Unify: (273) [user] mfix_vars1(1800, _304208)
   Call: (274) [system] is_list(1800)
^  Redo: (273) [user] mfix_vars1(1800, _304208)
^  Unify: (273) [user] mfix_vars1(1800, _304208)
   Call: (274) [system] string(1800)
^  Redo: (273) [user] mfix_vars1(1800, _304208)
^  Unify: (273) [user] mfix_vars1(1800, _304208)
   Call: (274) [system] compound(1800)
^  Redo: (273) [user] mfix_vars1(1800, _304208)
^  Unify: (273) [user] mfix_vars1(1800, _304208)
^  Call: (274) [user] symbol(1800)
^  Unify: (274) [user] symbol(1800)
   Call: (275) [system] atom(1800)
   Fail: (275) [system] atom(1800)
^  Fail: (274) [user] symbol(1800)
^  Redo: (273) [user] mfix_vars1(1800, _304208)
   Call: (274) [system] 1800=_304208
   Exit: (274) [system] 1800=1800
^  Exit: (273) [user] mfix_vars1(1800, 1800)
   Call: (273) [apply] apply:maplist_([0], _304210, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_([0], [_338534|_338536], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1(0, _338534)
^  Unify: (274) [user] mfix_vars1(0, _338534)
   Call: (275) [system] var(0)
^  Redo: (274) [user] mfix_vars1(0, _338534)
^  Unify: (274) [user] mfix_vars1(0, '$VAR'(_343180))
   Call: (275) [system] atom(0)
^  Redo: (274) [user] mfix_vars1(0, _338534)
^  Unify: (274) [user] mfix_vars1(0, _338534)
   Call: (275) [system] 0==true
^  Redo: (274) [user] mfix_vars1(0, _338534)
^  Unify: (274) [user] mfix_vars1(0, _338534)
   Call: (275) [system] 0==false
^  Redo: (274) [user] mfix_vars1(0, _338534)
^  Unify: (274) [user] mfix_vars1(0, _338534)
   Call: (275) [system] 0==[_352460, _352466]
^  Redo: (274) [user] mfix_vars1(0, _338534)
^  Unify: (274) [user] mfix_vars1(0, _338534)
   Call: (275) [system] is_list(0)
^  Redo: (274) [user] mfix_vars1(0, _338534)
^  Unify: (274) [user] mfix_vars1(0, _338534)
   Call: (275) [system] string(0)
^  Redo: (274) [user] mfix_vars1(0, _338534)
^  Unify: (274) [user] mfix_vars1(0, _338534)
   Call: (275) [system] compound(0)
^  Redo: (274) [user] mfix_vars1(0, _338534)
^  Unify: (274) [user] mfix_vars1(0, _338534)
^  Call: (275) [user] symbol(0)
^  Unify: (275) [user] symbol(0)
   Call: (276) [system] atom(0)
   Fail: (276) [system] atom(0)
^  Fail: (275) [user] symbol(0)
^  Redo: (274) [user] mfix_vars1(0, _338534)
   Call: (275) [system] 0=_338534
   Exit: (275) [system] 0=0
^  Exit: (274) [user] mfix_vars1(0, 0)
   Call: (274) [apply] apply:maplist_([], _338536, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_([1800, 0], [1800, 0], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([";; Converted:", 1800, 0], [";; Converted:", 1800, 0], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [";; Converted:", 1800, 0], [";; Converted:", 1800, 0])
   Call: (270) [system] compound_name_arguments(_232708, '$COMMENT', [";; Converted:", 1800, 0])
   Exit: (270) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1800, 0), '$COMMENT', [";; Converted:", 1800, 0])
^  Exit: (269) [user] mfix_vars1('$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0))
^  Exit: (268) [system] call(user:mfix_vars1, '$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0))
^  Exit: (267) [system] once(user:call(mfix_vars1, '$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1800, 0)\=@='$COMMENT'(";; Converted:", 1800, 0)
^  Redo: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1800, 0), _227122)
^  Unify: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0))
^  Exit: (266) [user] trly(mfix_vars1, '$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0))
^  Exit: (265) [system] once(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, '$COMMENT'(";; Converted:", 1800, 0), _388708))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1800, 0), _388708))
^  Call: (265) [user] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1800, 0), _388708))
^  Unify: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1800, 0), _388708))
^  Call: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1800, 0), _388708)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1800, 0), _388708)
^  Call: (267) [user] once(call(cons_to_c, '$COMMENT'(";; Converted:", 1800, 0), _394294))
^  Unify: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1800, 0), _394294))
^  Call: (268) [user] call(cons_to_c, '$COMMENT'(";; Converted:", 1800, 0), _394294)
^  Unify: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1800, 0), _394294)
^  Call: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1800, 0), _394294)
^  Unify: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c('$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0))
^  Exit: (268) [system] call(user:cons_to_c, '$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0))
^  Exit: (267) [system] once(user:call(cons_to_c, '$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1800, 0)\=@='$COMMENT'(";; Converted:", 1800, 0)
^  Redo: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1800, 0), _388708)
^  Unify: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0))
^  Exit: (266) [user] trly(cons_to_c, '$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0))
^  Exit: (265) [system] once(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0)))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, '$COMMENT'(";; Converted:", 1800, 0), _221510))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1800, 0), _221510))
^  Call: (265) [user] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1800, 0), _221510))
^  Unify: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1800, 0), _221510))
^  Call: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1800, 0), _221510)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1800, 0), _221510)
^  Call: (267) [user] once(call(cons_to_l, '$COMMENT'(";; Converted:", 1800, 0), _416614))
^  Unify: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1800, 0), _416614))
^  Call: (268) [user] call(cons_to_l, '$COMMENT'(";; Converted:", 1800, 0), _416614)
^  Unify: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1800, 0), _416614)
^  Call: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1800, 0), _416614)
^  Unify: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0))
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l('$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0))
^  Exit: (268) [system] call(user:cons_to_l, '$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0))
^  Exit: (267) [system] once(user:call(cons_to_l, '$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0)))
   Call: (267) [system] '$COMMENT'(";; Converted:", 1800, 0)\=@='$COMMENT'(";; Converted:", 1800, 0)
^  Redo: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1800, 0), _221510)
^  Unify: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0))
^  Exit: (266) [user] trly(cons_to_l, '$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0))
^  Exit: (265) [system] once(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0)))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0)))
^  Exit: (263) [user] untyped_to_metta('$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0))
^  Exit: (262) [system] call(user:untyped_to_metta, '$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0))
^  Exit: (261) [system] once(user:call(untyped_to_metta, '$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0)))
   Call: (261) [system] '$COMMENT'(";; Converted:", 1800, 0)\=@='$COMMENT'(";; Converted:", 1800, 0)
^  Redo: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1800, 0), _5908)
^  Unify: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0))
^  Exit: (260) [user] trly(untyped_to_metta, '$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1800, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1800, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1800, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1800, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1800, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'(";; Converted:", 1800, 0))
^  Call: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1800, 0), _445392, [], _445394)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0), [], [])
   Call: (258) [system] var('$COMMENT'(";; Converted:", 1800, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1800, 0), _445392, [], _445394)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1800, 0), _445392, [], _445394)
   Call: (258) [system] atom('$COMMENT'(";; Converted:", 1800, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1800, 0), _445392, [], _445394)
^  Unify: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1800, 0), _445392, [], _445394)
   Call: (258) [system] compound('$COMMENT'(";; Converted:", 1800, 0))
   Exit: (258) [system] compound('$COMMENT'(";; Converted:", 1800, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1800, 0), _454708, _454710)
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1800, 0), '$COMMENT', [";; Converted:", 1800, 0])
^  Call: (258) [user] subst_vars([";; Converted:", 1800, 0], _456594, [], _445394)
^  Unify: (258) [user] subst_vars([";; Converted:", 1800, 0], [";; Converted:", 1800, 0], [], [])
   Call: (259) [system] var([";; Converted:", 1800, 0])
^  Redo: (258) [user] subst_vars([";; Converted:", 1800, 0], _456594, [], _445394)
^  Unify: (258) [user] subst_vars([";; Converted:", 1800, 0], [_460330|_460332], [], _445394)
^  Call: (259) [user] subst_vars(";; Converted:", _460330, [], _461270)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
   Call: (260) [system] var(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _460330, [], _461270)
^  Unify: (259) [user] subst_vars(";; Converted:", _460330, [], _461270)
   Call: (260) [system] atom(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _460330, [], _461270)
^  Unify: (259) [user] subst_vars(";; Converted:", _460330, [], _461270)
   Call: (260) [system] compound(";; Converted:")
^  Redo: (259) [user] subst_vars(";; Converted:", _460330, [], _461270)
^  Unify: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Exit: (259) [user] subst_vars(";; Converted:", ";; Converted:", [], [])
^  Call: (259) [user] subst_vars([1800, 0], _460332, [], _445394)
^  Unify: (259) [user] subst_vars([1800, 0], [1800, 0], [], [])
   Call: (260) [system] var([1800, 0])
^  Redo: (259) [user] subst_vars([1800, 0], _460332, [], _445394)
^  Unify: (259) [user] subst_vars([1800, 0], [_476202|_476204], [], _445394)
^  Call: (260) [user] subst_vars(1800, _476202, [], _477142)
^  Unify: (260) [user] subst_vars(1800, 1800, [], [])
   Call: (261) [system] var(1800)
^  Redo: (260) [user] subst_vars(1800, _476202, [], _477142)
^  Unify: (260) [user] subst_vars(1800, _476202, [], _477142)
   Call: (261) [system] atom(1800)
^  Redo: (260) [user] subst_vars(1800, _476202, [], _477142)
^  Unify: (260) [user] subst_vars(1800, _476202, [], _477142)
   Call: (261) [system] compound(1800)
^  Redo: (260) [user] subst_vars(1800, _476202, [], _477142)
^  Unify: (260) [user] subst_vars(1800, 1800, [], [])
^  Exit: (260) [user] subst_vars(1800, 1800, [], [])
^  Call: (260) [user] subst_vars([0], _476204, [], _445394)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _476204, [], _445394)
^  Unify: (260) [user] subst_vars([0], [_492074|_492076], [], _445394)
^  Call: (261) [user] subst_vars(0, _492074, [], _493014)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _492074, [], _493014)
^  Unify: (261) [user] subst_vars(0, _492074, [], _493014)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _492074, [], _493014)
^  Unify: (261) [user] subst_vars(0, _492074, [], _493014)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _492074, [], _493014)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _492076, [], _445394)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _492076, [], _445394)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([1800, 0], [1800, 0], [], [])
^  Exit: (258) [user] subst_vars([";; Converted:", 1800, 0], [";; Converted:", 1800, 0], [], [])
   Call: (258) [system] compound_name_arguments(_445392, '$COMMENT', [";; Converted:", 1800, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'(";; Converted:", 1800, 0), '$COMMENT', [";; Converted:", 1800, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'(";; Converted:", 1800, 0), '$COMMENT'(";; Converted:", 1800, 0), [], [])
   Call: (257) [system] _515432=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1800, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'(";; Converted:", 1800, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, '$COMMENT'(";; Converted:", 1800, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1800, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'(";; Converted:", 1800, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1800, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1800, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1800, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'(";; Converted:", 1800, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] retract(metta_file_comment(_5912, _5914, _5916, _5918, _5920))
^  Exit: (260) [user] retract(metta_file_comment(1, 0, 0, [:, 'ErrorType', 'Type'], '$stream_position'(0, 1, 0, 0)))
^  Call: (260) [user] trly(untyped_to_metta, [:, 'ErrorType', 'Type'], _5908)
^  Unify: (260) [user] trly(untyped_to_metta, [:, 'ErrorType', 'Type'], _5908)
^  Call: (261) [user] once(call(untyped_to_metta, [:, 'ErrorType', 'Type'], _51036))
^  Unify: (261) [system] once(user:call(untyped_to_metta, [:, 'ErrorType', 'Type'], _51036))
^  Call: (262) [user] call(untyped_to_metta, [:, 'ErrorType', 'Type'], _51036)
^  Unify: (262) [system] call(user:untyped_to_metta, [:, 'ErrorType', 'Type'], _51036)
^  Call: (263) [user] untyped_to_metta([:, 'ErrorType', 'Type'], _51036)
^  Unify: (263) [user] untyped_to_metta([:, 'ErrorType', 'Type'], _51036)
^  Call: (264) [user] must_det_ll(trly(mfix_vars1, [:, 'ErrorType', 'Type'], _56648))
^  Unify: (264) [user] must_det_ll(user:trly(mfix_vars1, [:, 'ErrorType', 'Type'], _56648))
^  Call: (265) [user] once(user:trly(mfix_vars1, [:, 'ErrorType', 'Type'], _56648))
^  Unify: (265) [system] once(user:trly(mfix_vars1, [:, 'ErrorType', 'Type'], _56648))
^  Call: (266) [user] trly(mfix_vars1, [:, 'ErrorType', 'Type'], _56648)
^  Unify: (266) [user] trly(mfix_vars1, [:, 'ErrorType', 'Type'], _56648)
^  Call: (267) [user] once(call(mfix_vars1, [:, 'ErrorType', 'Type'], _62234))
^  Unify: (267) [system] once(user:call(mfix_vars1, [:, 'ErrorType', 'Type'], _62234))
^  Call: (268) [user] call(mfix_vars1, [:, 'ErrorType', 'Type'], _62234)
^  Unify: (268) [system] call(user:mfix_vars1, [:, 'ErrorType', 'Type'], _62234)
^  Call: (269) [user] mfix_vars1([:, 'ErrorType', 'Type'], _62234)
^  Unify: (269) [user] mfix_vars1([:, 'ErrorType', 'Type'], _62234)
   Call: (270) [system] var([:, 'ErrorType', 'Type'])
^  Redo: (269) [user] mfix_vars1([:, 'ErrorType', 'Type'], _62234)
^  Unify: (269) [user] mfix_vars1([:, 'ErrorType', 'Type'], '$VAR'(_69694))
   Call: (270) [system] atom([:, 'ErrorType', 'Type'])
^  Redo: (269) [user] mfix_vars1([:, 'ErrorType', 'Type'], _62234)
^  Unify: (269) [user] mfix_vars1([:, 'ErrorType', 'Type'], _62234)
   Call: (270) [system] [:, 'ErrorType', 'Type']==true
^  Redo: (269) [user] mfix_vars1([:, 'ErrorType', 'Type'], _62234)
^  Unify: (269) [user] mfix_vars1([:, 'ErrorType', 'Type'], _62234)
   Call: (270) [system] [:, 'ErrorType', 'Type']==false
^  Redo: (269) [user] mfix_vars1([:, 'ErrorType', 'Type'], _62234)
^  Unify: (269) [user] mfix_vars1([:, 'ErrorType', 'Type'], _62234)
   Call: (270) [system] (:)=='['
^  Redo: (269) [user] mfix_vars1([:, 'ErrorType', 'Type'], _62234)
^  Unify: (269) [user] mfix_vars1([:, 'ErrorType', 'Type'], _62234)
   Call: (270) [system] (:)=='{'
^  Redo: (269) [user] mfix_vars1([:, 'ErrorType', 'Type'], _62234)
^  Unify: (269) [user] mfix_vars1([:, 'ErrorType', 'Type'], _62234)
   Call: (270) [system] is_list(['ErrorType', 'Type'])
   Exit: (270) [system] is_list(['ErrorType', 'Type'])
   Call: (270) [lists] lists:last(['ErrorType', 'Type'], _86388)
   Unify: (270) [lists] lists:last(['ErrorType', 'Type'], _86388)
   Call: (271) [lists] lists:last_(['Type'], 'ErrorType', _86388)
   Unify: (271) [lists] lists:last_(['Type'], 'ErrorType', _86388)
   Call: (272) [lists] lists:last_([], 'Type', _86388)
   Unify: (272) [lists] lists:last_([], 'Type', 'Type')
   Exit: (272) [lists] lists:last_([], 'Type', 'Type')
   Exit: (271) [lists] lists:last_(['Type'], 'ErrorType', 'Type')
   Exit: (270) [lists] lists:last(['ErrorType', 'Type'], 'Type')
   Call: (270) [system] 'Type'=='}'
^  Redo: (269) [user] mfix_vars1([:, 'ErrorType', 'Type'], _62234)
^  Unify: (269) [user] mfix_vars1([:, 'ErrorType', 'Type'], _62234)
   Call: (270) [system] [:, 'ErrorType', 'Type']==[_97552, _97558]
^  Redo: (269) [user] mfix_vars1([:, 'ErrorType', 'Type'], _62234)
^  Unify: (269) [user] mfix_vars1([:, 'ErrorType', 'Type'], _62234)
   Call: (270) [system] fail
^  Redo: (269) [user] mfix_vars1([:, 'ErrorType', 'Type'], _62234)
^  Unify: (269) [user] mfix_vars1([:, 'ErrorType', 'Type'], _62234)
   Call: (270) [system] is_list([:, 'ErrorType', 'Type'])
   Exit: (270) [system] is_list([:, 'ErrorType', 'Type'])
^  Call: (270) [user] apply:maplist(mfix_vars1, [:, 'ErrorType', 'Type'], _62234)
^  Unify: (270) [apply] apply:maplist(user:mfix_vars1, [:, 'ErrorType', 'Type'], _62234)
   Call: (271) [apply] apply:maplist_([:, 'ErrorType', 'Type'], _62234, user:mfix_vars1)
   Unify: (271) [apply] apply:maplist_([:, 'ErrorType', 'Type'], [_107782|_107784], user:mfix_vars1)
^  Call: (272) [user] mfix_vars1(:, _107782)
^  Unify: (272) [user] mfix_vars1(:, _107782)
   Call: (273) [system] var(:)
^  Redo: (272) [user] mfix_vars1(:, _107782)
^  Unify: (272) [user] mfix_vars1(:, '$VAR'(_112428))
   Call: (273) [system] atom(:)
   Exit: (273) [system] atom(:)
^  Call: (273) [user] symbol_concat($, _115206, :)
^  Unify: (273) [user] symbol_concat($, _115206, :)
   Call: (274) [system] atom_concat($, _115206, :)
   Fail: (274) [system] atom_concat($, _115206, :)
^  Fail: (273) [user] symbol_concat($, _115206, :)
^  Redo: (272) [user] mfix_vars1(:, _107782)
^  Unify: (272) [user] mfix_vars1(:, _107782)
   Call: (273) [system] (:)==true
^  Redo: (272) [user] mfix_vars1(:, _107782)
^  Unify: (272) [user] mfix_vars1(:, _107782)
   Call: (273) [system] (:)==false
^  Redo: (272) [user] mfix_vars1(:, _107782)
^  Unify: (272) [user] mfix_vars1(:, _107782)
   Call: (273) [system] (:)==[_127294, _127300]
^  Redo: (272) [user] mfix_vars1(:, _107782)
^  Unify: (272) [user] mfix_vars1(:, _107782)
   Call: (273) [system] is_list(:)
^  Redo: (272) [user] mfix_vars1(:, _107782)
^  Unify: (272) [user] mfix_vars1(:, _107782)
   Call: (273) [system] string(:)
^  Redo: (272) [user] mfix_vars1(:, _107782)
^  Unify: (272) [user] mfix_vars1(:, _107782)
   Call: (273) [system] compound(:)
^  Redo: (272) [user] mfix_vars1(:, _107782)
^  Unify: (272) [user] mfix_vars1(:, _107782)
^  Call: (273) [user] symbol(:)
^  Unify: (273) [user] symbol(:)
   Call: (274) [system] atom(:)
   Exit: (274) [system] atom(:)
^  Exit: (273) [user] symbol(:)
^  Unify: (272) [user] mfix_vars1(:, :)
^  Exit: (272) [user] mfix_vars1(:, :)
   Call: (272) [apply] apply:maplist_(['ErrorType', 'Type'], _107784, user:mfix_vars1)
   Unify: (272) [apply] apply:maplist_(['ErrorType', 'Type'], [_145838|_145840], user:mfix_vars1)
^  Call: (273) [user] mfix_vars1('ErrorType', _145838)
^  Unify: (273) [user] mfix_vars1('ErrorType', _145838)
   Call: (274) [system] var('ErrorType')
^  Redo: (273) [user] mfix_vars1('ErrorType', _145838)
^  Unify: (273) [user] mfix_vars1('ErrorType', '$VAR'(_150484))
   Call: (274) [system] atom('ErrorType')
   Exit: (274) [system] atom('ErrorType')
^  Call: (274) [user] symbol_concat($, _153262, 'ErrorType')
^  Unify: (274) [user] symbol_concat($, _153262, 'ErrorType')
   Call: (275) [system] atom_concat($, _153262, 'ErrorType')
   Fail: (275) [system] atom_concat($, _153262, 'ErrorType')
^  Fail: (274) [user] symbol_concat($, _153262, 'ErrorType')
^  Redo: (273) [user] mfix_vars1('ErrorType', _145838)
^  Unify: (273) [user] mfix_vars1('ErrorType', _145838)
   Call: (274) [system] 'ErrorType'==true
^  Redo: (273) [user] mfix_vars1('ErrorType', _145838)
^  Unify: (273) [user] mfix_vars1('ErrorType', _145838)
   Call: (274) [system] 'ErrorType'==false
^  Redo: (273) [user] mfix_vars1('ErrorType', _145838)
^  Unify: (273) [user] mfix_vars1('ErrorType', _145838)
   Call: (274) [system] 'ErrorType'==[_165350, _165356]
^  Redo: (273) [user] mfix_vars1('ErrorType', _145838)
^  Unify: (273) [user] mfix_vars1('ErrorType', _145838)
   Call: (274) [system] is_list('ErrorType')
^  Redo: (273) [user] mfix_vars1('ErrorType', _145838)
^  Unify: (273) [user] mfix_vars1('ErrorType', _145838)
   Call: (274) [system] string('ErrorType')
^  Redo: (273) [user] mfix_vars1('ErrorType', _145838)
^  Unify: (273) [user] mfix_vars1('ErrorType', _145838)
   Call: (274) [system] compound('ErrorType')
^  Redo: (273) [user] mfix_vars1('ErrorType', _145838)
^  Unify: (273) [user] mfix_vars1('ErrorType', _145838)
^  Call: (274) [user] symbol('ErrorType')
^  Unify: (274) [user] symbol('ErrorType')
   Call: (275) [system] atom('ErrorType')
   Exit: (275) [system] atom('ErrorType')
^  Exit: (274) [user] symbol('ErrorType')
^  Unify: (273) [user] mfix_vars1('ErrorType', 'ErrorType')
^  Exit: (273) [user] mfix_vars1('ErrorType', 'ErrorType')
   Call: (273) [apply] apply:maplist_(['Type'], _145840, user:mfix_vars1)
   Unify: (273) [apply] apply:maplist_(['Type'], [_183894|_183896], user:mfix_vars1)
^  Call: (274) [user] mfix_vars1('Type', _183894)
^  Unify: (274) [user] mfix_vars1('Type', _183894)
   Call: (275) [system] var('Type')
^  Redo: (274) [user] mfix_vars1('Type', _183894)
^  Unify: (274) [user] mfix_vars1('Type', '$VAR'(_188540))
   Call: (275) [system] atom('Type')
   Exit: (275) [system] atom('Type')
^  Call: (275) [user] symbol_concat($, _191318, 'Type')
^  Unify: (275) [user] symbol_concat($, _191318, 'Type')
   Call: (276) [system] atom_concat($, _191318, 'Type')
   Fail: (276) [system] atom_concat($, _191318, 'Type')
^  Fail: (275) [user] symbol_concat($, _191318, 'Type')
^  Redo: (274) [user] mfix_vars1('Type', _183894)
^  Unify: (274) [user] mfix_vars1('Type', _183894)
   Call: (275) [system] 'Type'==true
^  Redo: (274) [user] mfix_vars1('Type', _183894)
^  Unify: (274) [user] mfix_vars1('Type', _183894)
   Call: (275) [system] 'Type'==false
^  Redo: (274) [user] mfix_vars1('Type', _183894)
^  Unify: (274) [user] mfix_vars1('Type', _183894)
   Call: (275) [system] 'Type'==[_203406, _203412]
^  Redo: (274) [user] mfix_vars1('Type', _183894)
^  Unify: (274) [user] mfix_vars1('Type', _183894)
   Call: (275) [system] is_list('Type')
^  Redo: (274) [user] mfix_vars1('Type', _183894)
^  Unify: (274) [user] mfix_vars1('Type', _183894)
   Call: (275) [system] string('Type')
^  Redo: (274) [user] mfix_vars1('Type', _183894)
^  Unify: (274) [user] mfix_vars1('Type', _183894)
   Call: (275) [system] compound('Type')
^  Redo: (274) [user] mfix_vars1('Type', _183894)
^  Unify: (274) [user] mfix_vars1('Type', _183894)
^  Call: (275) [user] symbol('Type')
^  Unify: (275) [user] symbol('Type')
   Call: (276) [system] atom('Type')
   Exit: (276) [system] atom('Type')
^  Exit: (275) [user] symbol('Type')
^  Unify: (274) [user] mfix_vars1('Type', 'Type')
^  Exit: (274) [user] mfix_vars1('Type', 'Type')
   Call: (274) [apply] apply:maplist_([], _183896, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (273) [apply] apply:maplist_(['Type'], ['Type'], user:mfix_vars1)
   Exit: (272) [apply] apply:maplist_(['ErrorType', 'Type'], ['ErrorType', 'Type'], user:mfix_vars1)
   Exit: (271) [apply] apply:maplist_([:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type'], user:mfix_vars1)
^  Exit: (270) [apply] apply:maplist(user:mfix_vars1, [:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type'])
^  Exit: (269) [user] mfix_vars1([:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type'])
^  Exit: (268) [system] call(user:mfix_vars1, [:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type'])
^  Exit: (267) [system] once(user:call(mfix_vars1, [:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type']))
   Call: (267) [system] [:, 'ErrorType', 'Type']\=@=[:, 'ErrorType', 'Type']
^  Redo: (266) [user] trly(mfix_vars1, [:, 'ErrorType', 'Type'], _56648)
^  Unify: (266) [user] trly(mfix_vars1, [:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type'])
^  Exit: (266) [user] trly(mfix_vars1, [:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type'])
^  Exit: (265) [system] once(user:trly(mfix_vars1, [:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type']))
^  Exit: (264) [user] must_det_ll(user:trly(mfix_vars1, [:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type']))
^  Call: (264) [user] must_det_ll(trly(cons_to_c, [:, 'ErrorType', 'Type'], _235926))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_c, [:, 'ErrorType', 'Type'], _235926))
^  Call: (265) [user] once(user:trly(cons_to_c, [:, 'ErrorType', 'Type'], _235926))
^  Unify: (265) [system] once(user:trly(cons_to_c, [:, 'ErrorType', 'Type'], _235926))
^  Call: (266) [user] trly(cons_to_c, [:, 'ErrorType', 'Type'], _235926)
^  Unify: (266) [user] trly(cons_to_c, [:, 'ErrorType', 'Type'], _235926)
^  Call: (267) [user] once(call(cons_to_c, [:, 'ErrorType', 'Type'], _241512))
^  Unify: (267) [system] once(user:call(cons_to_c, [:, 'ErrorType', 'Type'], _241512))
^  Call: (268) [user] call(cons_to_c, [:, 'ErrorType', 'Type'], _241512)
^  Unify: (268) [system] call(user:cons_to_c, [:, 'ErrorType', 'Type'], _241512)
^  Call: (269) [user] cons_to_c([:, 'ErrorType', 'Type'], _241512)
^  Unify: (269) [user] cons_to_c([:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type'])
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_c([:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type'])
^  Exit: (268) [system] call(user:cons_to_c, [:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type'])
^  Exit: (267) [system] once(user:call(cons_to_c, [:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type']))
   Call: (267) [system] [:, 'ErrorType', 'Type']\=@=[:, 'ErrorType', 'Type']
^  Redo: (266) [user] trly(cons_to_c, [:, 'ErrorType', 'Type'], _235926)
^  Unify: (266) [user] trly(cons_to_c, [:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type'])
^  Exit: (266) [user] trly(cons_to_c, [:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type'])
^  Exit: (265) [system] once(user:trly(cons_to_c, [:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type']))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_c, [:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type']))
^  Call: (264) [user] must_det_ll(trly(cons_to_l, [:, 'ErrorType', 'Type'], _51036))
^  Unify: (264) [user] must_det_ll(user:trly(cons_to_l, [:, 'ErrorType', 'Type'], _51036))
^  Call: (265) [user] once(user:trly(cons_to_l, [:, 'ErrorType', 'Type'], _51036))
^  Unify: (265) [system] once(user:trly(cons_to_l, [:, 'ErrorType', 'Type'], _51036))
^  Call: (266) [user] trly(cons_to_l, [:, 'ErrorType', 'Type'], _51036)
^  Unify: (266) [user] trly(cons_to_l, [:, 'ErrorType', 'Type'], _51036)
^  Call: (267) [user] once(call(cons_to_l, [:, 'ErrorType', 'Type'], _263832))
^  Unify: (267) [system] once(user:call(cons_to_l, [:, 'ErrorType', 'Type'], _263832))
^  Call: (268) [user] call(cons_to_l, [:, 'ErrorType', 'Type'], _263832)
^  Unify: (268) [system] call(user:cons_to_l, [:, 'ErrorType', 'Type'], _263832)
^  Call: (269) [user] cons_to_l([:, 'ErrorType', 'Type'], _263832)
^  Unify: (269) [user] cons_to_l([:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type'])
^  Call: (270) [user] no_cons_reduce
^  Unify: (270) [user] no_cons_reduce
^  Exit: (270) [user] no_cons_reduce
^  Exit: (269) [user] cons_to_l([:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type'])
^  Exit: (268) [system] call(user:cons_to_l, [:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type'])
^  Exit: (267) [system] once(user:call(cons_to_l, [:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type']))
   Call: (267) [system] [:, 'ErrorType', 'Type']\=@=[:, 'ErrorType', 'Type']
^  Redo: (266) [user] trly(cons_to_l, [:, 'ErrorType', 'Type'], _51036)
^  Unify: (266) [user] trly(cons_to_l, [:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type'])
^  Exit: (266) [user] trly(cons_to_l, [:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type'])
^  Exit: (265) [system] once(user:trly(cons_to_l, [:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type']))
^  Exit: (264) [user] must_det_ll(user:trly(cons_to_l, [:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type']))
^  Exit: (263) [user] untyped_to_metta([:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type'])
^  Exit: (262) [system] call(user:untyped_to_metta, [:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type'])
^  Exit: (261) [system] once(user:call(untyped_to_metta, [:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type']))
   Call: (261) [system] [:, 'ErrorType', 'Type']\=@=[:, 'ErrorType', 'Type']
^  Redo: (260) [user] trly(untyped_to_metta, [:, 'ErrorType', 'Type'], _5908)
^  Unify: (260) [user] trly(untyped_to_metta, [:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type'])
^  Exit: (260) [user] trly(untyped_to_metta, [:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type'])
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'ErrorType', 'Type'])
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'ErrorType', 'Type'])))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'ErrorType', 'Type'])))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'ErrorType', 'Type'])))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'ErrorType', 'Type'])
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), [:, 'ErrorType', 'Type'])
^  Call: (257) [user] subst_vars([:, 'ErrorType', 'Type'], _292610, [], _292612)
^  Unify: (257) [user] subst_vars([:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type'], [], [])
   Call: (258) [system] var([:, 'ErrorType', 'Type'])
^  Redo: (257) [user] subst_vars([:, 'ErrorType', 'Type'], _292610, [], _292612)
^  Unify: (257) [user] subst_vars([:, 'ErrorType', 'Type'], [_296348|_296350], [], _292612)
^  Call: (258) [user] subst_vars(:, _296348, [], _297288)
^  Unify: (258) [user] subst_vars(:, :, [], [])
   Call: (259) [system] var(:)
^  Redo: (258) [user] subst_vars(:, _296348, [], _297288)
^  Unify: (258) [user] subst_vars(:, _296348, [], _297288)
   Call: (259) [system] atom(:)
   Exit: (259) [system] atom(:)
^  Call: (259) [user] symbol_concat($, _303806, :)
^  Unify: (259) [user] symbol_concat($, _303806, :)
   Call: (260) [system] atom_concat($, _303806, :)
   Fail: (260) [system] atom_concat($, _303806, :)
^  Fail: (259) [user] symbol_concat($, _303806, :)
^  Redo: (258) [user] subst_vars(:, _296348, [], _297288)
^  Unify: (258) [user] subst_vars(:, _296348, [], _297288)
   Call: (259) [system] compound(:)
^  Redo: (258) [user] subst_vars(:, _296348, [], _297288)
^  Unify: (258) [user] subst_vars(:, :, [], [])
^  Exit: (258) [user] subst_vars(:, :, [], [])
^  Call: (258) [user] subst_vars(['ErrorType', 'Type'], _296350, [], _292612)
^  Unify: (258) [user] subst_vars(['ErrorType', 'Type'], ['ErrorType', 'Type'], [], [])
   Call: (259) [system] var(['ErrorType', 'Type'])
^  Redo: (258) [user] subst_vars(['ErrorType', 'Type'], _296350, [], _292612)
^  Unify: (258) [user] subst_vars(['ErrorType', 'Type'], [_317806|_317808], [], _292612)
^  Call: (259) [user] subst_vars('ErrorType', _317806, [], _318746)
^  Unify: (259) [user] subst_vars('ErrorType', 'ErrorType', [], [])
   Call: (260) [system] var('ErrorType')
^  Redo: (259) [user] subst_vars('ErrorType', _317806, [], _318746)
^  Unify: (259) [user] subst_vars('ErrorType', _317806, [], _318746)
   Call: (260) [system] atom('ErrorType')
   Exit: (260) [system] atom('ErrorType')
^  Call: (260) [user] symbol_concat($, _325264, 'ErrorType')
^  Unify: (260) [user] symbol_concat($, _325264, 'ErrorType')
   Call: (261) [system] atom_concat($, _325264, 'ErrorType')
   Fail: (261) [system] atom_concat($, _325264, 'ErrorType')
^  Fail: (260) [user] symbol_concat($, _325264, 'ErrorType')
^  Redo: (259) [user] subst_vars('ErrorType', _317806, [], _318746)
^  Unify: (259) [user] subst_vars('ErrorType', _317806, [], _318746)
   Call: (260) [system] compound('ErrorType')
^  Redo: (259) [user] subst_vars('ErrorType', _317806, [], _318746)
^  Unify: (259) [user] subst_vars('ErrorType', 'ErrorType', [], [])
^  Exit: (259) [user] subst_vars('ErrorType', 'ErrorType', [], [])
^  Call: (259) [user] subst_vars(['Type'], _317808, [], _292612)
^  Unify: (259) [user] subst_vars(['Type'], ['Type'], [], [])
   Call: (260) [system] var(['Type'])
^  Redo: (259) [user] subst_vars(['Type'], _317808, [], _292612)
^  Unify: (259) [user] subst_vars(['Type'], [_339264|_339266], [], _292612)
^  Call: (260) [user] subst_vars('Type', _339264, [], _340204)
^  Unify: (260) [user] subst_vars('Type', 'Type', [], [])
   Call: (261) [system] var('Type')
^  Redo: (260) [user] subst_vars('Type', _339264, [], _340204)
^  Unify: (260) [user] subst_vars('Type', _339264, [], _340204)
   Call: (261) [system] atom('Type')
   Exit: (261) [system] atom('Type')
^  Call: (261) [user] symbol_concat($, _346722, 'Type')
^  Unify: (261) [user] symbol_concat($, _346722, 'Type')
   Call: (262) [system] atom_concat($, _346722, 'Type')
   Fail: (262) [system] atom_concat($, _346722, 'Type')
^  Fail: (261) [user] symbol_concat($, _346722, 'Type')
^  Redo: (260) [user] subst_vars('Type', _339264, [], _340204)
^  Unify: (260) [user] subst_vars('Type', _339264, [], _340204)
   Call: (261) [system] compound('Type')
^  Redo: (260) [user] subst_vars('Type', _339264, [], _340204)
^  Unify: (260) [user] subst_vars('Type', 'Type', [], [])
^  Exit: (260) [user] subst_vars('Type', 'Type', [], [])
^  Call: (260) [user] subst_vars([], _339266, [], _292612)
^  Unify: (260) [user] subst_vars([], [], [], [])
   Call: (261) [system] var([])
^  Redo: (260) [user] subst_vars([], _339266, [], _292612)
^  Unify: (260) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([], [], [], [])
^  Exit: (259) [user] subst_vars(['Type'], ['Type'], [], [])
^  Exit: (258) [user] subst_vars(['ErrorType', 'Type'], ['ErrorType', 'Type'], [], [])
^  Exit: (257) [user] subst_vars([:, 'ErrorType', 'Type'], [:, 'ErrorType', 'Type'], [], [])
   Call: (257) [system] _365400=metta_file_buffer(+, [:, 'ErrorType', 'Type'], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
   Exit: (257) [system] metta_file_buffer(+, [:, 'ErrorType', 'Type'], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))=metta_file_buffer(+, [:, 'ErrorType', 'Type'], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))
^  Call: (257) [user] assertz(metta_file_buffer(+, [:, 'ErrorType', 'Type'], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, [:, 'ErrorType', 'Type'], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'ErrorType', 'Type'], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'ErrorType', 'Type'], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'ErrorType', 'Type'], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'ErrorType', 'Type'], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(0, 1, 0, 0))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
   Redo: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _416194)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _417132))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _417132)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 18)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _416194)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _416194)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_416194))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_416194))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_416194))
   Exit: (259) [system] nonvar(position(_416194))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(18, 1, 18, 18)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(18, 1, 18, 18))
   Call: (257) [user] current_read_mode(file, _436612)
   Unify: (257) [user] current_read_mode(file, _436612)
   Call: (258) [system] nb_current(file_mode, _436612)
   Redo: (257) [user] current_read_mode(file, _436612)
   Call: (258) [system] _436612=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _443062)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _443062)
^  Call: (258) [user] clause(t_l:s_reader_info(_443062), _445008, _444930)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _443062)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _443062)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _443062)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _443062)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _443062)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _443062)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _443062)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _443062)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _458838)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (260) [system] char_type('\n', space)
   Exit: (260) [system] char_type('\n', space)
   Call: (260) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (260) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _443062)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _443062)
   Call: (261) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _443062)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _443062)
   Call: (261) [system] peek_char((0x55aefe44e2f0), _469044)
   Exit: (261) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (261) [system] char_type('(', space)
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _443062)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _443062)
^  Call: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (262) [system] string((0x55aefe44e2f0))
^  Redo: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _443062)
^  Unify: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _443062)
^  Call: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _443062)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _443062)
   Call: (263) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _443062)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _443062)
   Call: (263) [system] peek_char((0x55aefe44e2f0), _484798)
   Exit: (263) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (263) [system] char_type('(', space)
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _443062)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _443062)
   Call: (263) [system] _489440=(0x55aefe44e2f0)
   Exit: (263) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (263) [user] once((read_position((0x55aefe44e2f0), _491308, _491310, _491312, _491314), read_sexpr((0x55aefe44e2f0), _491326), assertz(metta_file_comment(_491308, _491310, _491312, _491326, _491314))))
^  Unify: (263) [system] once(user:(read_position((0x55aefe44e2f0), _491308, _491310, _491312, _491314), read_sexpr((0x55aefe44e2f0), _491326), assertz(metta_file_comment(_491308, _491310, _491312, _491326, _491314))))
^  Call: (265) [user] read_position((0x55aefe44e2f0), _491308, _491310, _491312, _491314)
^  Unify: (265) [user] read_position((0x55aefe44e2f0), _491308, _491310, _491312, _491314)
   Call: (266) [system] stream_property((0x55aefe44e2f0), position(_491314))
   Unify: (266) [system] stream_property((0x55aefe44e2f0), position(_491314))
   Call: (267) [system] nonvar((0x55aefe44e2f0))
   Exit: (267) [system] nonvar((0x55aefe44e2f0))
   Call: (267) [system] nonvar(position(_491314))
   Exit: (267) [system] nonvar(position(_491314))
   Exit: (266) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(19, 2, 0, 19)))
   Call: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(19, 2, 0, 19), _491308)
   Unify: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(19, 2, 0, 19), _491308)
   Call: (267) [system] nonvar(line_count)
   Exit: (267) [system] nonvar(line_count)
   Call: (267) [$syspreds] stream_position_field(line_count, _505296)
   Unify: (267) [$syspreds] stream_position_field(line_count, 2)
   Exit: (267) [$syspreds] stream_position_field(line_count, 2)
   Call: (267) [system] arg(2, '$stream_position'(19, 2, 0, 19), _491308)
   Exit: (267) [system] arg(2, '$stream_position'(19, 2, 0, 19), 2)
   Exit: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(19, 2, 0, 19), 2)
   Call: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(19, 2, 0, 19), _491310)
   Unify: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(19, 2, 0, 19), _491310)
   Call: (267) [system] nonvar(line_position)
   Exit: (267) [system] nonvar(line_position)
   Call: (267) [$syspreds] stream_position_field(line_position, _514590)
   Unify: (267) [$syspreds] stream_position_field(line_position, 3)
   Exit: (267) [$syspreds] stream_position_field(line_position, 3)
   Call: (267) [system] arg(3, '$stream_position'(19, 2, 0, 19), _491310)
   Exit: (267) [system] arg(3, '$stream_position'(19, 2, 0, 19), 0)
   Exit: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(19, 2, 0, 19), 0)
   Call: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(19, 2, 0, 19), _491312)
   Unify: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(19, 2, 0, 19), _491312)
   Call: (267) [system] nonvar(char_count)
   Exit: (267) [system] nonvar(char_count)
   Call: (267) [$syspreds] stream_position_field(char_count, _5978)
   Unify: (267) [$syspreds] stream_position_field(char_count, 1)
   Exit: (267) [$syspreds] stream_position_field(char_count, 1)
   Call: (267) [system] arg(1, '$stream_position'(19, 2, 0, 19), _5928)
   Exit: (267) [system] arg(1, '$stream_position'(19, 2, 0, 19), 19)
   Exit: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(19, 2, 0, 19), 19)
^  Exit: (265) [user] read_position((0x55aefe44e2f0), 2, 0, 19, '$stream_position'(19, 2, 0, 19))
^  Call: (265) [user] read_sexpr((0x55aefe44e2f0), _5942)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _5942)
   Call: (266) [system] string((0x55aefe44e2f0))
^  Redo: (265) [user] read_sexpr((0x55aefe44e2f0), _5942)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _5942)
^  Call: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _5942)
^  Unify: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _5942)
^  Call: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _20718)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (268) [system] '('=(;)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', 'white')
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', end_of_line)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', space)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', cntrl)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (267) [system] get_char((0x55aefe44e2f0), _37502)
   Exit: (267) [system] get_char((0x55aefe44e2f0), '(')
   Call: (267) [system] '('='('
   Exit: (267) [system] '('='('
^  Call: (267) [user] read_list(')', (0x55aefe44e2f0), _5942)
^  Unify: (267) [user] read_list(')', (0x55aefe44e2f0), _5942)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _44928)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, 'white')
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, end_of_line)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, space)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _61712)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), :)
   Call: (268) [system] (:)=')'
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _5942)
   Call: (268) [system] (:)=end_of_file
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _5942)
^  Call: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _67290)
^  Unify: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _67290)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _71004)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, 'white')
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, end_of_line)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, space)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, cntrl)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] get_char((0x55aefe44e2f0), _87788)
   Exit: (269) [system] get_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)='('
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _67290)
   Call: (269) [system] (:)='['
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _67290)
   Call: (269) [system] (:)='{'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _67290)
   Call: (269) [system] (:)='"'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _67290)
   Call: (269) [system] (:)=!
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _67290)
   Call: (269) [system] (:)='\''
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _67290)
   Call: (269) [system] (:)='`'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _67290)
   Call: (269) [system] (:)=end_of_file
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _67290)
^  Call: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _67290)
^  Unify: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _67290)
^  Call: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _106398)
^  Unify: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _106398)
   Call: (271) [system] peek_char((0x55aefe44e2f0), _108264)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] is_delimiter(' ')
^  Unify: (271) [user] is_delimiter(' ')
   Call: (272) [system] char_type(' ', space)
   Exit: (272) [system] char_type(' ', space)
^  Exit: (271) [user] is_delimiter(' ')
   Call: (271) [system] _106398=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (270) [user] classify_and_convert_charseq(:, [], _67290)
^  Unify: (270) [user] classify_and_convert_charseq(:, [], _67290)
^  Call: (272) [system] setup_call_cleanup('$notrace'(_119430, _119432), once(user:catch(read_from_chars([:], _67290), _119406, fail)), '$restore_trace'(_119430, _119432))
^  Unify: (272) [system] setup_call_cleanup(system:'$notrace'(_119430, _119432), system:once(user:catch(read_from_chars([:], _67290), _119406, fail)), system:'$restore_trace'(_119430, _119432))
^  Call: (273) [system] sig_atomic(system:'$notrace'(_119430, _119432))
^  Exit: (272) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([:], :), _119406, fail)), system:'$restore_trace'(3, -1))
   Call: (271) [system] atomic(:)
   Exit: (271) [system] atomic(:)
^  Exit: (270) [user] classify_and_convert_charseq(:, [], :)
^  Exit: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, :)
^  Exit: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), :)
^  Call: (268) [user] read_list(')', (0x55aefe44e2f0), _127868)
^  Unify: (268) [user] read_list(')', (0x55aefe44e2f0), _127868)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _131582)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (270) [system] ' '=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(' ')
^  Unify: (270) [user] is_like_space(' ')
   Call: (271) [system] char_type(' ', 'white')
   Exit: (271) [system] char_type(' ', 'white')
^  Exit: (270) [user] is_like_space(' ')
   Call: (270) [system] get_char((0x55aefe44e2f0), _140240)
   Exit: (270) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _143868)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (271) [system] 'E'=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space('E')
^  Unify: (271) [user] is_like_space('E')
   Call: (272) [system] char_type('E', 'white')
^  Redo: (271) [user] is_like_space('E')
^  Unify: (271) [user] is_like_space('E')
   Call: (272) [system] char_type('E', end_of_line)
^  Redo: (271) [user] is_like_space('E')
^  Unify: (271) [user] is_like_space('E')
   Call: (272) [system] char_type('E', space)
^  Redo: (271) [user] is_like_space('E')
^  Unify: (271) [user] is_like_space('E')
   Call: (272) [system] char_type('E', cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _161576)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (269) [system] 'E'=')'
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _127868)
   Call: (269) [system] 'E'=end_of_file
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _127868)
^  Call: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _167154)
^  Unify: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _167154)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _170868)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (271) [system] 'E'=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space('E')
^  Unify: (271) [user] is_like_space('E')
   Call: (272) [system] char_type('E', 'white')
^  Redo: (271) [user] is_like_space('E')
^  Unify: (271) [user] is_like_space('E')
   Call: (272) [system] char_type('E', end_of_line)
^  Redo: (271) [user] is_like_space('E')
^  Unify: (271) [user] is_like_space('E')
   Call: (272) [system] char_type('E', space)
^  Redo: (271) [user] is_like_space('E')
^  Unify: (271) [user] is_like_space('E')
   Call: (272) [system] char_type('E', cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] get_char((0x55aefe44e2f0), _187652)
   Exit: (270) [system] get_char((0x55aefe44e2f0), 'E')
   Call: (270) [system] 'E'='('
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _167154)
   Call: (270) [system] 'E'='['
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _167154)
   Call: (270) [system] 'E'='{'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _167154)
   Call: (270) [system] 'E'='"'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _167154)
   Call: (270) [system] 'E'=!
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _167154)
   Call: (270) [system] 'E'='\''
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _167154)
   Call: (270) [system] 'E'='`'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _167154)
   Call: (270) [system] 'E'=end_of_file
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _167154)
^  Call: (270) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', _167154)
^  Unify: (270) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', _167154)
^  Call: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _206262)
^  Unify: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _206262)
   Call: (272) [system] peek_char((0x55aefe44e2f0), _208128)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (272) [user] is_delimiter(r)
^  Unify: (272) [user] is_delimiter(r)
   Call: (273) [system] char_type(r, space)
^  Redo: (272) [user] is_delimiter(r)
   Call: (273) [system] arg(_213768, v('(', ')', end_of_file), r)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _206262)
   Call: (272) [system] ')'==r
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _206262)
   Call: (272) [system] get_char((0x55aefe44e2f0), r)
   Exit: (272) [system] get_char((0x55aefe44e2f0), r)
   Call: (272) [system] r=(\)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _206262)
^  Call: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _221134)
^  Unify: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _221134)
   Call: (273) [system] peek_char((0x55aefe44e2f0), _223000)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (273) [user] is_delimiter(r)
^  Unify: (273) [user] is_delimiter(r)
   Call: (274) [system] char_type(r, space)
^  Redo: (273) [user] is_delimiter(r)
   Call: (274) [system] arg(_228640, v('(', ')', end_of_file), r)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _221134)
   Call: (273) [system] ')'==r
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _221134)
   Call: (273) [system] get_char((0x55aefe44e2f0), r)
   Exit: (273) [system] get_char((0x55aefe44e2f0), r)
   Call: (273) [system] r=(\)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _221134)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _236006)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _236006)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _237872)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (274) [user] is_delimiter(o)
^  Unify: (274) [user] is_delimiter(o)
   Call: (275) [system] char_type(o, space)
^  Redo: (274) [user] is_delimiter(o)
   Call: (275) [system] arg(_243512, v('(', ')', end_of_file), o)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _236006)
   Call: (274) [system] ')'==o
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _236006)
   Call: (274) [system] get_char((0x55aefe44e2f0), o)
   Exit: (274) [system] get_char((0x55aefe44e2f0), o)
   Call: (274) [system] o=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _236006)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _250878)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _250878)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _252744)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (275) [user] is_delimiter(r)
^  Unify: (275) [user] is_delimiter(r)
   Call: (276) [system] char_type(r, space)
^  Redo: (275) [user] is_delimiter(r)
   Call: (276) [system] arg(_258384, v('(', ')', end_of_file), r)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _250878)
   Call: (275) [system] ')'==r
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _250878)
   Call: (275) [system] get_char((0x55aefe44e2f0), r)
   Exit: (275) [system] get_char((0x55aefe44e2f0), r)
   Call: (275) [system] r=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _250878)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _265750)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _265750)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _267616)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] is_delimiter(' ')
^  Unify: (276) [user] is_delimiter(' ')
   Call: (277) [system] char_type(' ', space)
   Exit: (277) [system] char_type(' ', space)
^  Exit: (276) [user] is_delimiter(' ')
   Call: (276) [system] _265750=[]
   Exit: (276) [system] []=[]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (275) [system] _250878=[r]
   Exit: (275) [system] [r]=[r]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r])
   Call: (274) [system] _236006=[o, r]
   Exit: (274) [system] [o, r]=[o, r]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, r])
   Call: (273) [system] _221134=[r, o, r]
   Exit: (273) [system] [r, o, r]=[r, o, r]
^  Exit: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, o, r])
   Call: (272) [system] _206262=[r, r, o, r]
   Exit: (272) [system] [r, r, o, r]=[r, r, o, r]
^  Exit: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, r, o, r])
^  Call: (271) [user] classify_and_convert_charseq('E', [r, r, o, r], _167154)
^  Unify: (271) [user] classify_and_convert_charseq('E', [r, r, o, r], _167154)
^  Call: (273) [system] setup_call_cleanup('$notrace'(_289958, _289960), once(user:catch(read_from_chars(['E', r, r, o, r], _167154), _289934, fail)), '$restore_trace'(_289958, _289960))
^  Unify: (273) [system] setup_call_cleanup(system:'$notrace'(_289958, _289960), system:once(user:catch(read_from_chars(['E', r, r, o, r], _167154), _289934, fail)), system:'$restore_trace'(_289958, _289960))
^  Call: (274) [system] sig_atomic(system:'$notrace'(_289958, _289960))
^  Exit: (273) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['E', r, r, o, r], _167154), _289934, fail)), system:'$restore_trace'(3, -1))
   Call: (272) [system] atomic(_167154)
^  Redo: (271) [user] classify_and_convert_charseq('E', [r, r, o, r], _167154)
^  Unify: (271) [user] classify_and_convert_charseq('E', [r, r, o, r], _167154)
   Call: (272) [system] atom_chars(_167154, ['E', r, r, o, r])
   Exit: (272) [system] atom_chars('Error', ['E', r, r, o, r])
^  Exit: (271) [user] classify_and_convert_charseq('E', [r, r, o, r], 'Error')
^  Exit: (270) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', 'Error')
^  Exit: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Error')
^  Call: (269) [user] read_list(')', (0x55aefe44e2f0), _301212)
^  Unify: (269) [user] read_list(')', (0x55aefe44e2f0), _301212)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _304926)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (271) [system] ' '=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(' ')
^  Unify: (271) [user] is_like_space(' ')
   Call: (272) [system] char_type(' ', 'white')
   Exit: (272) [system] char_type(' ', 'white')
^  Exit: (271) [user] is_like_space(' ')
   Call: (271) [system] get_char((0x55aefe44e2f0), _313584)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _317212)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _334920)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (270) [system] '('=')'
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _301212)
   Call: (270) [system] '('=end_of_file
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _301212)
^  Call: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _340498)
^  Unify: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _340498)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _344212)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] get_char((0x55aefe44e2f0), _360996)
   Exit: (271) [system] get_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('='('
   Exit: (271) [system] '('='('
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _340498)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _340498)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _368422)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, 'white')
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, end_of_line)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, space)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _385206)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), -)
   Call: (272) [system] (-)=')'
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _340498)
   Call: (272) [system] (-)=end_of_file
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _340498)
^  Call: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _390784)
^  Unify: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _390784)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _394498)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, 'white')
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, end_of_line)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, space)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] get_char((0x55aefe44e2f0), _411282)
   Exit: (273) [system] get_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)='('
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _390784)
   Call: (273) [system] (-)='['
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _390784)
   Call: (273) [system] (-)='{'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _390784)
   Call: (273) [system] (-)='"'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _390784)
   Call: (273) [system] (-)=!
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _390784)
   Call: (273) [system] (-)='\''
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _390784)
   Call: (273) [system] (-)='`'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _390784)
   Call: (273) [system] (-)=end_of_file
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _390784)
^  Call: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _390784)
^  Unify: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _390784)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _429892)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _429892)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _431758)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), >)
^  Call: (275) [user] is_delimiter(>)
^  Unify: (275) [user] is_delimiter(>)
   Call: (276) [system] char_type(>, space)
^  Redo: (275) [user] is_delimiter(>)
   Call: (276) [system] arg(_437398, v('(', ')', end_of_file), >)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _429892)
   Call: (275) [system] ')'==(>)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _429892)
   Call: (275) [system] get_char((0x55aefe44e2f0), >)
   Exit: (275) [system] get_char((0x55aefe44e2f0), >)
   Call: (275) [system] (>)=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _429892)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _444764)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _444764)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _446630)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] is_delimiter(' ')
^  Unify: (276) [user] is_delimiter(' ')
   Call: (277) [system] char_type(' ', space)
   Exit: (277) [system] char_type(' ', space)
^  Exit: (276) [user] is_delimiter(' ')
   Call: (276) [system] _444764=[]
   Exit: (276) [system] []=[]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (275) [system] _429892=[>]
   Exit: (275) [system] [>]=[>]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [>])
^  Call: (274) [user] classify_and_convert_charseq(-, [>], _390784)
^  Unify: (274) [user] classify_and_convert_charseq(-, [>], _390784)
^  Call: (276) [system] setup_call_cleanup('$notrace'(_460590, _460592), once(user:catch(read_from_chars([-, >], _390784), _460566, fail)), '$restore_trace'(_460590, _460592))
^  Unify: (276) [system] setup_call_cleanup(system:'$notrace'(_460590, _460592), system:once(user:catch(read_from_chars([-, >], _390784), _460566, fail)), system:'$restore_trace'(_460590, _460592))
^  Call: (277) [system] sig_atomic(system:'$notrace'(_460590, _460592))
^  Exit: (276) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([-, >], ->), _460566, fail)), system:'$restore_trace'(3, -1))
   Call: (275) [system] atomic(->)
   Exit: (275) [system] atomic(->)
^  Exit: (274) [user] classify_and_convert_charseq(-, [>], ->)
^  Exit: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, ->)
^  Exit: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), ->)
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _469028)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _469028)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _472742)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (274) [system] ' '=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(' ')
^  Unify: (274) [user] is_like_space(' ')
   Call: (275) [system] char_type(' ', 'white')
   Exit: (275) [system] char_type(' ', 'white')
^  Exit: (274) [user] is_like_space(' ')
   Call: (274) [system] get_char((0x55aefe44e2f0), _481400)
   Exit: (274) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _485028)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', 'white')
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', end_of_line)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', space)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _502736)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (273) [system] 'A'=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _469028)
   Call: (273) [system] 'A'=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _469028)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _508314)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _508314)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _512028)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', 'white')
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', end_of_line)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', space)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _10984)
   Exit: (274) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (274) [system] 'A'='('
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _6004)
   Call: (274) [system] 'A'='['
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _6004)
   Call: (274) [system] 'A'='{'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _6004)
   Call: (274) [system] 'A'='"'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _6004)
   Call: (274) [system] 'A'=!
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _6004)
   Call: (274) [system] 'A'='\''
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _6004)
   Call: (274) [system] 'A'='`'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _6004)
   Call: (274) [system] 'A'=end_of_file
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _6004)
^  Call: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _6004)
^  Unify: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _6004)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _29594)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _29594)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _31460)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (276) [user] is_delimiter(t)
^  Unify: (276) [user] is_delimiter(t)
   Call: (277) [system] char_type(t, space)
^  Redo: (276) [user] is_delimiter(t)
   Call: (277) [system] arg(_37100, v('(', ')', end_of_file), t)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _29594)
   Call: (276) [system] ')'==t
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _29594)
   Call: (276) [system] get_char((0x55aefe44e2f0), t)
   Exit: (276) [system] get_char((0x55aefe44e2f0), t)
   Call: (276) [system] t=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _29594)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _44466)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _44466)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _46332)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (277) [user] is_delimiter(o)
^  Unify: (277) [user] is_delimiter(o)
   Call: (278) [system] char_type(o, space)
^  Redo: (277) [user] is_delimiter(o)
   Call: (278) [system] arg(_51972, v('(', ')', end_of_file), o)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _44466)
   Call: (277) [system] ')'==o
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _44466)
   Call: (277) [system] get_char((0x55aefe44e2f0), o)
   Exit: (277) [system] get_char((0x55aefe44e2f0), o)
   Call: (277) [system] o=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _44466)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _59338)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _59338)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _61204)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (278) [user] is_delimiter(m)
^  Unify: (278) [user] is_delimiter(m)
   Call: (279) [system] char_type(m, space)
^  Redo: (278) [user] is_delimiter(m)
   Call: (279) [system] arg(_66844, v('(', ')', end_of_file), m)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _59338)
   Call: (278) [system] ')'==m
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _59338)
   Call: (278) [system] get_char((0x55aefe44e2f0), m)
   Exit: (278) [system] get_char((0x55aefe44e2f0), m)
   Call: (278) [system] m=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _59338)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _74210)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _74210)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _76076)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (279) [user] is_delimiter(' ')
^  Unify: (279) [user] is_delimiter(' ')
   Call: (280) [system] char_type(' ', space)
   Exit: (280) [system] char_type(' ', space)
^  Exit: (279) [user] is_delimiter(' ')
   Call: (279) [system] _74210=[]
   Exit: (279) [system] []=[]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (278) [system] _59338=[m]
   Exit: (278) [system] [m]=[m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (277) [system] _44466=[o, m]
   Exit: (277) [system] [o, m]=[o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (276) [system] _29594=[t, o, m]
   Exit: (276) [system] [t, o, m]=[t, o, m]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (275) [user] classify_and_convert_charseq('A', [t, o, m], _6004)
^  Unify: (275) [user] classify_and_convert_charseq('A', [t, o, m], _6004)
^  Call: (277) [system] setup_call_cleanup('$notrace'(_95624, _95626), once(user:catch(read_from_chars(['A', t, o, m], _6004), _95600, fail)), '$restore_trace'(_95624, _95626))
^  Unify: (277) [system] setup_call_cleanup(system:'$notrace'(_95624, _95626), system:once(user:catch(read_from_chars(['A', t, o, m], _6004), _95600, fail)), system:'$restore_trace'(_95624, _95626))
^  Call: (278) [system] sig_atomic(system:'$notrace'(_95624, _95626))
^  Exit: (277) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _6004), _95600, fail)), system:'$restore_trace'(3, -1))
   Call: (276) [system] atomic(_6004)
^  Redo: (275) [user] classify_and_convert_charseq('A', [t, o, m], _6004)
^  Unify: (275) [user] classify_and_convert_charseq('A', [t, o, m], _6004)
   Call: (276) [system] atom_chars(_6004, ['A', t, o, m])
   Exit: (276) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (275) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (273) [user] read_list(')', (0x55aefe44e2f0), _106878)
^  Unify: (273) [user] read_list(')', (0x55aefe44e2f0), _106878)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _110592)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (275) [system] ' '=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(' ')
^  Unify: (275) [user] is_like_space(' ')
   Call: (276) [system] char_type(' ', 'white')
   Exit: (276) [system] char_type(' ', 'white')
^  Exit: (275) [user] is_like_space(' ')
   Call: (275) [system] get_char((0x55aefe44e2f0), _119250)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _122878)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _140586)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (274) [system] 'A'=')'
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _106878)
   Call: (274) [system] 'A'=end_of_file
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _106878)
^  Call: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _146164)
^  Unify: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _146164)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _149878)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] get_char((0x55aefe44e2f0), _166662)
   Exit: (275) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'='('
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _146164)
   Call: (275) [system] 'A'='['
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _146164)
   Call: (275) [system] 'A'='{'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _146164)
   Call: (275) [system] 'A'='"'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _146164)
   Call: (275) [system] 'A'=!
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _146164)
   Call: (275) [system] 'A'='\''
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _146164)
   Call: (275) [system] 'A'='`'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _146164)
   Call: (275) [system] 'A'=end_of_file
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _146164)
^  Call: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _146164)
^  Unify: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _146164)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _185272)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _185272)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _187138)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (277) [user] is_delimiter(t)
^  Unify: (277) [user] is_delimiter(t)
   Call: (278) [system] char_type(t, space)
^  Redo: (277) [user] is_delimiter(t)
   Call: (278) [system] arg(_192778, v('(', ')', end_of_file), t)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _185272)
   Call: (277) [system] ')'==t
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _185272)
   Call: (277) [system] get_char((0x55aefe44e2f0), t)
   Exit: (277) [system] get_char((0x55aefe44e2f0), t)
   Call: (277) [system] t=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _185272)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _200144)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _200144)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _202010)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (278) [user] is_delimiter(o)
^  Unify: (278) [user] is_delimiter(o)
   Call: (279) [system] char_type(o, space)
^  Redo: (278) [user] is_delimiter(o)
   Call: (279) [system] arg(_207650, v('(', ')', end_of_file), o)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _200144)
   Call: (278) [system] ')'==o
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _200144)
   Call: (278) [system] get_char((0x55aefe44e2f0), o)
   Exit: (278) [system] get_char((0x55aefe44e2f0), o)
   Call: (278) [system] o=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _200144)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _215016)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _215016)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _216882)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (279) [user] is_delimiter(m)
^  Unify: (279) [user] is_delimiter(m)
   Call: (280) [system] char_type(m, space)
^  Redo: (279) [user] is_delimiter(m)
   Call: (280) [system] arg(_222522, v('(', ')', end_of_file), m)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _215016)
   Call: (279) [system] ')'==m
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _215016)
   Call: (279) [system] get_char((0x55aefe44e2f0), m)
   Exit: (279) [system] get_char((0x55aefe44e2f0), m)
   Call: (279) [system] m=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _215016)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _229888)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _229888)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _231754)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (280) [user] is_delimiter(' ')
^  Unify: (280) [user] is_delimiter(' ')
   Call: (281) [system] char_type(' ', space)
   Exit: (281) [system] char_type(' ', space)
^  Exit: (280) [user] is_delimiter(' ')
   Call: (280) [system] _229888=[]
   Exit: (280) [system] []=[]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (279) [system] _215016=[m]
   Exit: (279) [system] [m]=[m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (278) [system] _200144=[o, m]
   Exit: (278) [system] [o, m]=[o, m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (277) [system] _185272=[t, o, m]
   Exit: (277) [system] [t, o, m]=[t, o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (276) [user] classify_and_convert_charseq('A', [t, o, m], _146164)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _146164)
^  Call: (278) [system] setup_call_cleanup('$notrace'(_251302, _251304), once(user:catch(read_from_chars(['A', t, o, m], _146164), _251278, fail)), '$restore_trace'(_251302, _251304))
^  Unify: (278) [system] setup_call_cleanup(system:'$notrace'(_251302, _251304), system:once(user:catch(read_from_chars(['A', t, o, m], _146164), _251278, fail)), system:'$restore_trace'(_251302, _251304))
^  Call: (279) [system] sig_atomic(system:'$notrace'(_251302, _251304))
^  Exit: (278) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _146164), _251278, fail)), system:'$restore_trace'(3, -1))
   Call: (277) [system] atomic(_146164)
^  Redo: (276) [user] classify_and_convert_charseq('A', [t, o, m], _146164)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _146164)
   Call: (277) [system] atom_chars(_146164, ['A', t, o, m])
   Exit: (277) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (276) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _262556)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _262556)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _266270)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (276) [system] ' '=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(' ')
^  Unify: (276) [user] is_like_space(' ')
   Call: (277) [system] char_type(' ', 'white')
   Exit: (277) [system] char_type(' ', 'white')
^  Exit: (276) [user] is_like_space(' ')
   Call: (276) [system] get_char((0x55aefe44e2f0), _274928)
   Exit: (276) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _278556)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (277) [system] 'E'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space('E')
^  Unify: (277) [user] is_like_space('E')
   Call: (278) [system] char_type('E', 'white')
^  Redo: (277) [user] is_like_space('E')
^  Unify: (277) [user] is_like_space('E')
   Call: (278) [system] char_type('E', end_of_line)
^  Redo: (277) [user] is_like_space('E')
^  Unify: (277) [user] is_like_space('E')
   Call: (278) [system] char_type('E', space)
^  Redo: (277) [user] is_like_space('E')
^  Unify: (277) [user] is_like_space('E')
   Call: (278) [system] char_type('E', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _296264)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (275) [system] 'E'=')'
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _262556)
   Call: (275) [system] 'E'=end_of_file
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _262556)
^  Call: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _301842)
^  Unify: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _301842)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _305556)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (277) [system] 'E'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space('E')
^  Unify: (277) [user] is_like_space('E')
   Call: (278) [system] char_type('E', 'white')
^  Redo: (277) [user] is_like_space('E')
^  Unify: (277) [user] is_like_space('E')
   Call: (278) [system] char_type('E', end_of_line)
^  Redo: (277) [user] is_like_space('E')
^  Unify: (277) [user] is_like_space('E')
   Call: (278) [system] char_type('E', space)
^  Redo: (277) [user] is_like_space('E')
^  Unify: (277) [user] is_like_space('E')
   Call: (278) [system] char_type('E', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] get_char((0x55aefe44e2f0), _322340)
   Exit: (276) [system] get_char((0x55aefe44e2f0), 'E')
   Call: (276) [system] 'E'='('
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _301842)
   Call: (276) [system] 'E'='['
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _301842)
   Call: (276) [system] 'E'='{'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _301842)
   Call: (276) [system] 'E'='"'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _301842)
   Call: (276) [system] 'E'=!
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _301842)
   Call: (276) [system] 'E'='\''
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _301842)
   Call: (276) [system] 'E'='`'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _301842)
   Call: (276) [system] 'E'=end_of_file
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _301842)
^  Call: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', _301842)
^  Unify: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', _301842)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _340950)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _340950)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _342816)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (278) [user] is_delimiter(r)
^  Unify: (278) [user] is_delimiter(r)
   Call: (279) [system] char_type(r, space)
^  Redo: (278) [user] is_delimiter(r)
   Call: (279) [system] arg(_348456, v('(', ')', end_of_file), r)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _340950)
   Call: (278) [system] ')'==r
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _340950)
   Call: (278) [system] get_char((0x55aefe44e2f0), r)
   Exit: (278) [system] get_char((0x55aefe44e2f0), r)
   Call: (278) [system] r=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _340950)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _355822)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _355822)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _357688)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (279) [user] is_delimiter(r)
^  Unify: (279) [user] is_delimiter(r)
   Call: (280) [system] char_type(r, space)
^  Redo: (279) [user] is_delimiter(r)
   Call: (280) [system] arg(_363328, v('(', ')', end_of_file), r)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _355822)
   Call: (279) [system] ')'==r
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _355822)
   Call: (279) [system] get_char((0x55aefe44e2f0), r)
   Exit: (279) [system] get_char((0x55aefe44e2f0), r)
   Call: (279) [system] r=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _355822)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _370694)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _370694)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _372560)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (280) [user] is_delimiter(o)
^  Unify: (280) [user] is_delimiter(o)
   Call: (281) [system] char_type(o, space)
^  Redo: (280) [user] is_delimiter(o)
   Call: (281) [system] arg(_378200, v('(', ')', end_of_file), o)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _370694)
   Call: (280) [system] ')'==o
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _370694)
   Call: (280) [system] get_char((0x55aefe44e2f0), o)
   Exit: (280) [system] get_char((0x55aefe44e2f0), o)
   Call: (280) [system] o=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _370694)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _385566)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _385566)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _387432)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (281) [user] is_delimiter(r)
^  Unify: (281) [user] is_delimiter(r)
   Call: (282) [system] char_type(r, space)
^  Redo: (281) [user] is_delimiter(r)
   Call: (282) [system] arg(_393072, v('(', ')', end_of_file), r)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _385566)
   Call: (281) [system] ')'==r
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _385566)
   Call: (281) [system] get_char((0x55aefe44e2f0), r)
   Exit: (281) [system] get_char((0x55aefe44e2f0), r)
   Call: (281) [system] r=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _385566)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _400438)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _400438)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _402304)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), 'T')
^  Call: (282) [user] is_delimiter('T')
^  Unify: (282) [user] is_delimiter('T')
   Call: (283) [system] char_type('T', space)
^  Redo: (282) [user] is_delimiter('T')
   Call: (283) [system] arg(_407944, v('(', ')', end_of_file), 'T')
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _400438)
   Call: (282) [system] ')'=='T'
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _400438)
   Call: (282) [system] get_char((0x55aefe44e2f0), 'T')
   Exit: (282) [system] get_char((0x55aefe44e2f0), 'T')
   Call: (282) [system] 'T'=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _400438)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _415310)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _415310)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _417176)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), y)
^  Call: (283) [user] is_delimiter(y)
^  Unify: (283) [user] is_delimiter(y)
   Call: (284) [system] char_type(y, space)
^  Redo: (283) [user] is_delimiter(y)
   Call: (284) [system] arg(_422816, v('(', ')', end_of_file), y)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _415310)
   Call: (283) [system] ')'==y
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _415310)
   Call: (283) [system] get_char((0x55aefe44e2f0), y)
   Exit: (283) [system] get_char((0x55aefe44e2f0), y)
   Call: (283) [system] y=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _415310)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430182)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430182)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _432048)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (284) [user] is_delimiter(p)
^  Unify: (284) [user] is_delimiter(p)
   Call: (285) [system] char_type(p, space)
^  Redo: (284) [user] is_delimiter(p)
   Call: (285) [system] arg(_437688, v('(', ')', end_of_file), p)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430182)
   Call: (284) [system] ')'==p
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430182)
   Call: (284) [system] get_char((0x55aefe44e2f0), p)
   Exit: (284) [system] get_char((0x55aefe44e2f0), p)
   Call: (284) [system] p=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430182)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445054)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445054)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _446920)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (285) [user] is_delimiter(e)
^  Unify: (285) [user] is_delimiter(e)
   Call: (286) [system] char_type(e, space)
^  Redo: (285) [user] is_delimiter(e)
   Call: (286) [system] arg(_452560, v('(', ')', end_of_file), e)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445054)
   Call: (285) [system] ')'==e
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445054)
   Call: (285) [system] get_char((0x55aefe44e2f0), e)
   Exit: (285) [system] get_char((0x55aefe44e2f0), e)
   Call: (285) [system] e=(\)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445054)
^  Call: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _459926)
^  Unify: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _459926)
   Call: (286) [system] peek_char((0x55aefe44e2f0), _461792)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (286) [user] is_delimiter(')')
^  Unify: (286) [user] is_delimiter(')')
   Call: (287) [system] char_type(')', space)
^  Redo: (286) [user] is_delimiter(')')
   Call: (287) [system] arg(_467432, v('(', ')', end_of_file), ')')
   Exit: (287) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (286) [user] is_delimiter(')')
   Call: (286) [system] _459926=[]
   Exit: (286) [system] []=[]
^  Exit: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (285) [system] _445054=[e]
   Exit: (285) [system] [e]=[e]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e])
   Call: (284) [system] _430182=[p, e]
   Exit: (284) [system] [p, e]=[p, e]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, e])
   Call: (283) [system] _415310=[y, p, e]
   Exit: (283) [system] [y, p, e]=[y, p, e]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [y, p, e])
   Call: (282) [system] _400438=['T', y, p, e]
   Exit: (282) [system] ['T', y, p, e]=['T', y, p, e]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), ['T', y, p, e])
   Call: (281) [system] _385566=[r, 'T', y, p, e]
   Exit: (281) [system] [r, 'T', y, p, e]=[r, 'T', y, p, e]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, 'T', y, p, e])
   Call: (280) [system] _370694=[o, r, 'T', y, p, e]
   Exit: (280) [system] [o, r, 'T', y, p, e]=[o, r, 'T', y, p, e]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, r, 'T', y, p, e])
   Call: (279) [system] _355822=[r, o, r, 'T', y, p, e]
   Exit: (279) [system] [r, o, r, 'T', y, p, e]=[r, o, r, 'T', y, p, e]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, o, r, 'T', y, p, e])
   Call: (278) [system] _340950=[r, r, o, r, 'T', y, p, e]
   Exit: (278) [system] [r, r, o, r, 'T', y, p, e]=[r, r, o, r, 'T', y, p, e]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, r, o, r, 'T', y, p, e])
^  Call: (277) [user] classify_and_convert_charseq('E', [r, r, o, r, 'T', y, p, e], _301842)
^  Unify: (277) [user] classify_and_convert_charseq('E', [r, r, o, r, 'T', y, p, e], _301842)
^  Call: (279) [system] setup_call_cleanup('$notrace'(_497178, _497180), once(user:catch(read_from_chars(['E', r, r, o, r, 'T', y, p, e], _301842), _497154, fail)), '$restore_trace'(_497178, _497180))
^  Unify: (279) [system] setup_call_cleanup(system:'$notrace'(_497178, _497180), system:once(user:catch(read_from_chars(['E', r, r, o, r, 'T', y, p, e], _301842), _497154, fail)), system:'$restore_trace'(_497178, _497180))
^  Call: (280) [system] sig_atomic(system:'$notrace'(_497178, _497180))
^  Exit: (279) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['E', r, r, o, r, 'T', y, p, e], _301842), _497154, fail)), system:'$restore_trace'(3, -1))
   Call: (278) [system] atomic(_301842)
^  Redo: (277) [user] classify_and_convert_charseq('E', [r, r, o, r, 'T', y, p, e], _301842)
^  Unify: (277) [user] classify_and_convert_charseq('E', [r, r, o, r, 'T', y, p, e], _301842)
   Call: (278) [system] atom_chars(_301842, ['E', r, r, o, r, 'T', y, p, e])
   Exit: (278) [system] atom_chars('ErrorType', ['E', r, r, o, r, 'T', y, p, e])
^  Exit: (277) [user] classify_and_convert_charseq('E', [r, r, o, r, 'T', y, p, e], 'ErrorType')
^  Exit: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', 'ErrorType')
^  Exit: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), 'ErrorType')
^  Call: (275) [user] read_list(')', (0x55aefe44e2f0), _508432)
^  Unify: (275) [user] read_list(')', (0x55aefe44e2f0), _508432)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _512146)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (277) [system] ')'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space(')')
^  Unify: (277) [user] is_like_space(')')
   Call: (278) [system] char_type(')', 'white')
^  Redo: (277) [user] is_like_space(')')
^  Unify: (277) [user] is_like_space(')')
   Call: (278) [system] char_type(')', end_of_line)
^  Redo: (277) [user] is_like_space(')')
^  Unify: (277) [user] is_like_space(')')
   Call: (278) [system] char_type(')', space)
^  Redo: (277) [user] is_like_space(')')
^  Unify: (277) [user] is_like_space(')')
   Call: (278) [system] char_type(')', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _11000)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (276) [system] ')'=')'
   Exit: (276) [system] ')'=')'
   Call: (276) [system] get_char((0x55aefe44e2f0), _14790)
   Exit: (276) [system] get_char((0x55aefe44e2f0), ')')
   Call: (276) [system] _6018=[]
   Exit: (276) [system] []=[]
^  Exit: (275) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (275) [system] _6012=['ErrorType']
   Exit: (275) [system] ['ErrorType']=['ErrorType']
^  Exit: (274) [user] read_list(')', (0x55aefe44e2f0), ['ErrorType'])
   Call: (274) [system] _6006=['Atom', 'ErrorType']
   Exit: (274) [system] ['Atom', 'ErrorType']=['Atom', 'ErrorType']
^  Exit: (273) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'ErrorType'])
   Call: (273) [system] _6000=['Atom', 'Atom', 'ErrorType']
   Exit: (273) [system] ['Atom', 'Atom', 'ErrorType']=['Atom', 'Atom', 'ErrorType']
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Atom', 'ErrorType'])
   Call: (272) [system] _5992=[->, 'Atom', 'Atom', 'ErrorType']
   Exit: (272) [system] [->, 'Atom', 'Atom', 'ErrorType']=[->, 'Atom', 'Atom', 'ErrorType']
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [->, 'Atom', 'Atom', 'ErrorType'])
^  Exit: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), [->, 'Atom', 'Atom', 'ErrorType'])
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _31466)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _31466)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _35180)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (272) [system] ')'=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', 'white')
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', end_of_line)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', space)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _51964)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (271) [system] ')'=')'
   Exit: (271) [system] ')'=')'
   Call: (271) [system] get_char((0x55aefe44e2f0), _55754)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ')')
   Call: (271) [system] _31466=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (270) [system] _5988=[[->, 'Atom', 'Atom', 'ErrorType']]
   Exit: (270) [system] [[->, 'Atom', 'Atom', 'ErrorType']]=[[->, 'Atom', 'Atom', 'ErrorType']]
^  Exit: (269) [user] read_list(')', (0x55aefe44e2f0), [[->, 'Atom', 'Atom', 'ErrorType']])
   Call: (269) [system] _5982=['Error', [->, 'Atom', 'Atom', 'ErrorType']]
   Exit: (269) [system] ['Error', [->, 'Atom', 'Atom', 'ErrorType']]=['Error', [->, 'Atom', 'Atom', 'ErrorType']]
^  Exit: (268) [user] read_list(')', (0x55aefe44e2f0), ['Error', [->, 'Atom', 'Atom', 'ErrorType']])
   Call: (268) [system] _5942=[:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]
   Exit: (268) [system] [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]=[:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]
^  Exit: (267) [user] read_list(')', (0x55aefe44e2f0), [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Exit: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Exit: (265) [user] read_sexpr((0x55aefe44e2f0), [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Call: (265) [user] assertz(metta_file_comment(2, 0, 19, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], '$stream_position'(19, 2, 0, 19)))
^  Exit: (265) [user] assertz(metta_file_comment(2, 0, 19, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], '$stream_position'(19, 2, 0, 19)))
^  Exit: (263) [system] once(user:(read_position((0x55aefe44e2f0), 2, 0, 19, '$stream_position'(19, 2, 0, 19)), read_sexpr((0x55aefe44e2f0), [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]), assertz(metta_file_comment(2, 0, 19, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], '$stream_position'(19, 2, 0, 19)))))
   Call: (263) [system] fail
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Call: (263) [user] retract(metta_file_comment(_76128, _76130, _76132, _76134, _76136))
^  Exit: (263) [user] retract(metta_file_comment(2, 0, 19, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], '$stream_position'(19, 2, 0, 19)))
^  Call: (263) [user] trly(untyped_to_metta, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _5908)
^  Call: (264) [user] once(call(untyped_to_metta, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _79920))
^  Unify: (264) [system] once(user:call(untyped_to_metta, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _79920))
^  Call: (265) [user] call(untyped_to_metta, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _79920)
^  Unify: (265) [system] call(user:untyped_to_metta, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _79920)
^  Call: (266) [user] untyped_to_metta([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _79920)
^  Unify: (266) [user] untyped_to_metta([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _79920)
^  Call: (267) [user] must_det_ll(trly(mfix_vars1, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _85532))
^  Unify: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _85532))
^  Call: (268) [user] once(user:trly(mfix_vars1, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _85532))
^  Unify: (268) [system] once(user:trly(mfix_vars1, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _85532))
^  Call: (269) [user] trly(mfix_vars1, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _85532)
^  Unify: (269) [user] trly(mfix_vars1, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _85532)
^  Call: (270) [user] once(call(mfix_vars1, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118))
^  Unify: (270) [system] once(user:call(mfix_vars1, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118))
^  Call: (271) [user] call(mfix_vars1, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118)
^  Unify: (271) [system] call(user:mfix_vars1, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118)
^  Call: (272) [user] mfix_vars1([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118)
^  Unify: (272) [user] mfix_vars1([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118)
   Call: (273) [system] var([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Redo: (272) [user] mfix_vars1([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118)
^  Unify: (272) [user] mfix_vars1([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], '$VAR'(_98578))
   Call: (273) [system] atom([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Redo: (272) [user] mfix_vars1([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118)
^  Unify: (272) [user] mfix_vars1([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118)
   Call: (273) [system] [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]==true
^  Redo: (272) [user] mfix_vars1([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118)
^  Unify: (272) [user] mfix_vars1([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118)
   Call: (273) [system] [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]==false
^  Redo: (272) [user] mfix_vars1([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118)
^  Unify: (272) [user] mfix_vars1([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118)
   Call: (273) [system] (:)=='['
^  Redo: (272) [user] mfix_vars1([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118)
^  Unify: (272) [user] mfix_vars1([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118)
   Call: (273) [system] (:)=='{'
^  Redo: (272) [user] mfix_vars1([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118)
^  Unify: (272) [user] mfix_vars1([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118)
   Call: (273) [system] is_list(['Error', [->, 'Atom', 'Atom', 'ErrorType']])
   Exit: (273) [system] is_list(['Error', [->, 'Atom', 'Atom', 'ErrorType']])
   Call: (273) [lists] lists:last(['Error', [->, 'Atom', 'Atom', 'ErrorType']], _115272)
   Unify: (273) [lists] lists:last(['Error', [->, 'Atom', 'Atom', 'ErrorType']], _115272)
   Call: (274) [lists] lists:last_([[->, 'Atom', 'Atom', 'ErrorType']], 'Error', _115272)
   Unify: (274) [lists] lists:last_([[->, 'Atom', 'Atom', 'ErrorType']], 'Error', _115272)
   Call: (275) [lists] lists:last_([], [->, 'Atom', 'Atom', 'ErrorType'], _115272)
   Unify: (275) [lists] lists:last_([], [->, 'Atom', 'Atom', 'ErrorType'], [->, 'Atom', 'Atom', 'ErrorType'])
   Exit: (275) [lists] lists:last_([], [->, 'Atom', 'Atom', 'ErrorType'], [->, 'Atom', 'Atom', 'ErrorType'])
   Exit: (274) [lists] lists:last_([[->, 'Atom', 'Atom', 'ErrorType']], 'Error', [->, 'Atom', 'Atom', 'ErrorType'])
   Exit: (273) [lists] lists:last(['Error', [->, 'Atom', 'Atom', 'ErrorType']], [->, 'Atom', 'Atom', 'ErrorType'])
   Call: (273) [system] [->, 'Atom', 'Atom', 'ErrorType']=='}'
^  Redo: (272) [user] mfix_vars1([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118)
^  Unify: (272) [user] mfix_vars1([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118)
   Call: (273) [system] [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]==[_126436, _126442]
^  Redo: (272) [user] mfix_vars1([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118)
^  Unify: (272) [user] mfix_vars1([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118)
   Call: (273) [system] fail
^  Redo: (272) [user] mfix_vars1([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118)
^  Unify: (272) [user] mfix_vars1([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118)
   Call: (273) [system] is_list([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
   Exit: (273) [system] is_list([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Call: (273) [user] apply:maplist(mfix_vars1, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118)
^  Unify: (273) [apply] apply:maplist(user:mfix_vars1, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118)
   Call: (274) [apply] apply:maplist_([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _91118, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [_136666|_136668], user:mfix_vars1)
^  Call: (275) [user] mfix_vars1(:, _136666)
^  Unify: (275) [user] mfix_vars1(:, _136666)
   Call: (276) [system] var(:)
^  Redo: (275) [user] mfix_vars1(:, _136666)
^  Unify: (275) [user] mfix_vars1(:, '$VAR'(_141312))
   Call: (276) [system] atom(:)
   Exit: (276) [system] atom(:)
^  Call: (276) [user] symbol_concat($, _144090, :)
^  Unify: (276) [user] symbol_concat($, _144090, :)
   Call: (277) [system] atom_concat($, _144090, :)
   Fail: (277) [system] atom_concat($, _144090, :)
^  Fail: (276) [user] symbol_concat($, _144090, :)
^  Redo: (275) [user] mfix_vars1(:, _136666)
^  Unify: (275) [user] mfix_vars1(:, _136666)
   Call: (276) [system] (:)==true
^  Redo: (275) [user] mfix_vars1(:, _136666)
^  Unify: (275) [user] mfix_vars1(:, _136666)
   Call: (276) [system] (:)==false
^  Redo: (275) [user] mfix_vars1(:, _136666)
^  Unify: (275) [user] mfix_vars1(:, _136666)
   Call: (276) [system] (:)==[_156178, _156184]
^  Redo: (275) [user] mfix_vars1(:, _136666)
^  Unify: (275) [user] mfix_vars1(:, _136666)
   Call: (276) [system] is_list(:)
^  Redo: (275) [user] mfix_vars1(:, _136666)
^  Unify: (275) [user] mfix_vars1(:, _136666)
   Call: (276) [system] string(:)
^  Redo: (275) [user] mfix_vars1(:, _136666)
^  Unify: (275) [user] mfix_vars1(:, _136666)
   Call: (276) [system] compound(:)
^  Redo: (275) [user] mfix_vars1(:, _136666)
^  Unify: (275) [user] mfix_vars1(:, _136666)
^  Call: (276) [user] symbol(:)
^  Unify: (276) [user] symbol(:)
   Call: (277) [system] atom(:)
   Exit: (277) [system] atom(:)
^  Exit: (276) [user] symbol(:)
^  Unify: (275) [user] mfix_vars1(:, :)
^  Exit: (275) [user] mfix_vars1(:, :)
   Call: (275) [apply] apply:maplist_(['Error', [->, 'Atom', 'Atom', 'ErrorType']], _136668, user:mfix_vars1)
   Unify: (275) [apply] apply:maplist_(['Error', [->, 'Atom', 'Atom', 'ErrorType']], [_174722|_174724], user:mfix_vars1)
^  Call: (276) [user] mfix_vars1('Error', _174722)
^  Unify: (276) [user] mfix_vars1('Error', _174722)
   Call: (277) [system] var('Error')
^  Redo: (276) [user] mfix_vars1('Error', _174722)
^  Unify: (276) [user] mfix_vars1('Error', '$VAR'(_179368))
   Call: (277) [system] atom('Error')
   Exit: (277) [system] atom('Error')
^  Call: (277) [user] symbol_concat($, _182146, 'Error')
^  Unify: (277) [user] symbol_concat($, _182146, 'Error')
   Call: (278) [system] atom_concat($, _182146, 'Error')
   Fail: (278) [system] atom_concat($, _182146, 'Error')
^  Fail: (277) [user] symbol_concat($, _182146, 'Error')
^  Redo: (276) [user] mfix_vars1('Error', _174722)
^  Unify: (276) [user] mfix_vars1('Error', _174722)
   Call: (277) [system] 'Error'==true
^  Redo: (276) [user] mfix_vars1('Error', _174722)
^  Unify: (276) [user] mfix_vars1('Error', _174722)
   Call: (277) [system] 'Error'==false
^  Redo: (276) [user] mfix_vars1('Error', _174722)
^  Unify: (276) [user] mfix_vars1('Error', _174722)
   Call: (277) [system] 'Error'==[_194234, _194240]
^  Redo: (276) [user] mfix_vars1('Error', _174722)
^  Unify: (276) [user] mfix_vars1('Error', _174722)
   Call: (277) [system] is_list('Error')
^  Redo: (276) [user] mfix_vars1('Error', _174722)
^  Unify: (276) [user] mfix_vars1('Error', _174722)
   Call: (277) [system] string('Error')
^  Redo: (276) [user] mfix_vars1('Error', _174722)
^  Unify: (276) [user] mfix_vars1('Error', _174722)
   Call: (277) [system] compound('Error')
^  Redo: (276) [user] mfix_vars1('Error', _174722)
^  Unify: (276) [user] mfix_vars1('Error', _174722)
^  Call: (277) [user] symbol('Error')
^  Unify: (277) [user] symbol('Error')
   Call: (278) [system] atom('Error')
   Exit: (278) [system] atom('Error')
^  Exit: (277) [user] symbol('Error')
^  Unify: (276) [user] mfix_vars1('Error', 'Error')
^  Exit: (276) [user] mfix_vars1('Error', 'Error')
   Call: (276) [apply] apply:maplist_([[->, 'Atom', 'Atom', 'ErrorType']], _174724, user:mfix_vars1)
   Unify: (276) [apply] apply:maplist_([[->, 'Atom', 'Atom', 'ErrorType']], [_212778|_212780], user:mfix_vars1)
^  Call: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'ErrorType'], _212778)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'ErrorType'], _212778)
   Call: (278) [system] var([->, 'Atom', 'Atom', 'ErrorType'])
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'ErrorType'], _212778)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'ErrorType'], '$VAR'(_217424))
   Call: (278) [system] atom([->, 'Atom', 'Atom', 'ErrorType'])
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'ErrorType'], _212778)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'ErrorType'], _212778)
   Call: (278) [system] [->, 'Atom', 'Atom', 'ErrorType']==true
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'ErrorType'], _212778)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'ErrorType'], _212778)
   Call: (278) [system] [->, 'Atom', 'Atom', 'ErrorType']==false
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'ErrorType'], _212778)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'ErrorType'], _212778)
   Call: (278) [system] (->)=='['
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'ErrorType'], _212778)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'ErrorType'], _212778)
   Call: (278) [system] (->)=='{'
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'ErrorType'], _212778)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'ErrorType'], _212778)
   Call: (278) [system] is_list(['Atom', 'Atom', 'ErrorType'])
   Exit: (278) [system] is_list(['Atom', 'Atom', 'ErrorType'])
   Call: (278) [lists] lists:last(['Atom', 'Atom', 'ErrorType'], _234118)
   Unify: (278) [lists] lists:last(['Atom', 'Atom', 'ErrorType'], _234118)
   Call: (279) [lists] lists:last_(['Atom', 'ErrorType'], 'Atom', _234118)
   Unify: (279) [lists] lists:last_(['Atom', 'ErrorType'], 'Atom', _234118)
   Call: (280) [lists] lists:last_(['ErrorType'], 'Atom', _234118)
   Unify: (280) [lists] lists:last_(['ErrorType'], 'Atom', _234118)
   Call: (281) [lists] lists:last_([], 'ErrorType', _234118)
   Unify: (281) [lists] lists:last_([], 'ErrorType', 'ErrorType')
   Exit: (281) [lists] lists:last_([], 'ErrorType', 'ErrorType')
   Exit: (280) [lists] lists:last_(['ErrorType'], 'Atom', 'ErrorType')
   Exit: (279) [lists] lists:last_(['Atom', 'ErrorType'], 'Atom', 'ErrorType')
   Exit: (278) [lists] lists:last(['Atom', 'Atom', 'ErrorType'], 'ErrorType')
   Call: (278) [system] 'ErrorType'=='}'
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'ErrorType'], _212778)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'ErrorType'], _212778)
   Call: (278) [system] [->, 'Atom', 'Atom', 'ErrorType']==[_248078, _248084]
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'ErrorType'], _212778)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'ErrorType'], _212778)
   Call: (278) [system] fail
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'ErrorType'], _212778)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'ErrorType'], _212778)
   Call: (278) [system] is_list([->, 'Atom', 'Atom', 'ErrorType'])
   Exit: (278) [system] is_list([->, 'Atom', 'Atom', 'ErrorType'])
^  Call: (278) [user] apply:maplist(mfix_vars1, [->, 'Atom', 'Atom', 'ErrorType'], _212778)
^  Unify: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Atom', 'ErrorType'], _212778)
   Call: (279) [apply] apply:maplist_([->, 'Atom', 'Atom', 'ErrorType'], _212778, user:mfix_vars1)
   Unify: (279) [apply] apply:maplist_([->, 'Atom', 'Atom', 'ErrorType'], [_258308|_258310], user:mfix_vars1)
^  Call: (280) [user] mfix_vars1(->, _258308)
^  Unify: (280) [user] mfix_vars1(->, _258308)
   Call: (281) [system] var(->)
^  Redo: (280) [user] mfix_vars1(->, _258308)
^  Unify: (280) [user] mfix_vars1(->, '$VAR'(_262954))
   Call: (281) [system] atom(->)
   Exit: (281) [system] atom(->)
^  Call: (281) [user] symbol_concat($, _265732, ->)
^  Unify: (281) [user] symbol_concat($, _265732, ->)
   Call: (282) [system] atom_concat($, _265732, ->)
   Fail: (282) [system] atom_concat($, _265732, ->)
^  Fail: (281) [user] symbol_concat($, _265732, ->)
^  Redo: (280) [user] mfix_vars1(->, _258308)
^  Unify: (280) [user] mfix_vars1(->, _258308)
   Call: (281) [system] (->)==true
^  Redo: (280) [user] mfix_vars1(->, _258308)
^  Unify: (280) [user] mfix_vars1(->, _258308)
   Call: (281) [system] (->)==false
^  Redo: (280) [user] mfix_vars1(->, _258308)
^  Unify: (280) [user] mfix_vars1(->, _258308)
   Call: (281) [system] (->)==[_277820, _277826]
^  Redo: (280) [user] mfix_vars1(->, _258308)
^  Unify: (280) [user] mfix_vars1(->, _258308)
   Call: (281) [system] is_list(->)
^  Redo: (280) [user] mfix_vars1(->, _258308)
^  Unify: (280) [user] mfix_vars1(->, _258308)
   Call: (281) [system] string(->)
^  Redo: (280) [user] mfix_vars1(->, _258308)
^  Unify: (280) [user] mfix_vars1(->, _258308)
   Call: (281) [system] compound(->)
^  Redo: (280) [user] mfix_vars1(->, _258308)
^  Unify: (280) [user] mfix_vars1(->, _258308)
^  Call: (281) [user] symbol(->)
^  Unify: (281) [user] symbol(->)
   Call: (282) [system] atom(->)
   Exit: (282) [system] atom(->)
^  Exit: (281) [user] symbol(->)
^  Unify: (280) [user] mfix_vars1(->, ->)
^  Exit: (280) [user] mfix_vars1(->, ->)
   Call: (280) [apply] apply:maplist_(['Atom', 'Atom', 'ErrorType'], _258310, user:mfix_vars1)
   Unify: (280) [apply] apply:maplist_(['Atom', 'Atom', 'ErrorType'], [_296364|_296366], user:mfix_vars1)
^  Call: (281) [user] mfix_vars1('Atom', _296364)
^  Unify: (281) [user] mfix_vars1('Atom', _296364)
   Call: (282) [system] var('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _296364)
^  Unify: (281) [user] mfix_vars1('Atom', '$VAR'(_301010))
   Call: (282) [system] atom('Atom')
   Exit: (282) [system] atom('Atom')
^  Call: (282) [user] symbol_concat($, _303788, 'Atom')
^  Unify: (282) [user] symbol_concat($, _303788, 'Atom')
   Call: (283) [system] atom_concat($, _303788, 'Atom')
   Fail: (283) [system] atom_concat($, _303788, 'Atom')
^  Fail: (282) [user] symbol_concat($, _303788, 'Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _296364)
^  Unify: (281) [user] mfix_vars1('Atom', _296364)
   Call: (282) [system] 'Atom'==true
^  Redo: (281) [user] mfix_vars1('Atom', _296364)
^  Unify: (281) [user] mfix_vars1('Atom', _296364)
   Call: (282) [system] 'Atom'==false
^  Redo: (281) [user] mfix_vars1('Atom', _296364)
^  Unify: (281) [user] mfix_vars1('Atom', _296364)
   Call: (282) [system] 'Atom'==[_315876, _315882]
^  Redo: (281) [user] mfix_vars1('Atom', _296364)
^  Unify: (281) [user] mfix_vars1('Atom', _296364)
   Call: (282) [system] is_list('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _296364)
^  Unify: (281) [user] mfix_vars1('Atom', _296364)
   Call: (282) [system] string('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _296364)
^  Unify: (281) [user] mfix_vars1('Atom', _296364)
   Call: (282) [system] compound('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _296364)
^  Unify: (281) [user] mfix_vars1('Atom', _296364)
^  Call: (282) [user] symbol('Atom')
^  Unify: (282) [user] symbol('Atom')
   Call: (283) [system] atom('Atom')
   Exit: (283) [system] atom('Atom')
^  Exit: (282) [user] symbol('Atom')
^  Unify: (281) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (281) [user] mfix_vars1('Atom', 'Atom')
   Call: (281) [apply] apply:maplist_(['Atom', 'ErrorType'], _296366, user:mfix_vars1)
   Unify: (281) [apply] apply:maplist_(['Atom', 'ErrorType'], [_334420|_334422], user:mfix_vars1)
^  Call: (282) [user] mfix_vars1('Atom', _334420)
^  Unify: (282) [user] mfix_vars1('Atom', _334420)
   Call: (283) [system] var('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _334420)
^  Unify: (282) [user] mfix_vars1('Atom', '$VAR'(_339066))
   Call: (283) [system] atom('Atom')
   Exit: (283) [system] atom('Atom')
^  Call: (283) [user] symbol_concat($, _341844, 'Atom')
^  Unify: (283) [user] symbol_concat($, _341844, 'Atom')
   Call: (284) [system] atom_concat($, _341844, 'Atom')
   Fail: (284) [system] atom_concat($, _341844, 'Atom')
^  Fail: (283) [user] symbol_concat($, _341844, 'Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _334420)
^  Unify: (282) [user] mfix_vars1('Atom', _334420)
   Call: (283) [system] 'Atom'==true
^  Redo: (282) [user] mfix_vars1('Atom', _334420)
^  Unify: (282) [user] mfix_vars1('Atom', _334420)
   Call: (283) [system] 'Atom'==false
^  Redo: (282) [user] mfix_vars1('Atom', _334420)
^  Unify: (282) [user] mfix_vars1('Atom', _334420)
   Call: (283) [system] 'Atom'==[_353932, _353938]
^  Redo: (282) [user] mfix_vars1('Atom', _334420)
^  Unify: (282) [user] mfix_vars1('Atom', _334420)
   Call: (283) [system] is_list('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _334420)
^  Unify: (282) [user] mfix_vars1('Atom', _334420)
   Call: (283) [system] string('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _334420)
^  Unify: (282) [user] mfix_vars1('Atom', _334420)
   Call: (283) [system] compound('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _334420)
^  Unify: (282) [user] mfix_vars1('Atom', _334420)
^  Call: (283) [user] symbol('Atom')
^  Unify: (283) [user] symbol('Atom')
   Call: (284) [system] atom('Atom')
   Exit: (284) [system] atom('Atom')
^  Exit: (283) [user] symbol('Atom')
^  Unify: (282) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (282) [user] mfix_vars1('Atom', 'Atom')
   Call: (282) [apply] apply:maplist_(['ErrorType'], _334422, user:mfix_vars1)
   Unify: (282) [apply] apply:maplist_(['ErrorType'], [_372476|_372478], user:mfix_vars1)
^  Call: (283) [user] mfix_vars1('ErrorType', _372476)
^  Unify: (283) [user] mfix_vars1('ErrorType', _372476)
   Call: (284) [system] var('ErrorType')
^  Redo: (283) [user] mfix_vars1('ErrorType', _372476)
^  Unify: (283) [user] mfix_vars1('ErrorType', '$VAR'(_377122))
   Call: (284) [system] atom('ErrorType')
   Exit: (284) [system] atom('ErrorType')
^  Call: (284) [user] symbol_concat($, _379900, 'ErrorType')
^  Unify: (284) [user] symbol_concat($, _379900, 'ErrorType')
   Call: (285) [system] atom_concat($, _379900, 'ErrorType')
   Fail: (285) [system] atom_concat($, _379900, 'ErrorType')
^  Fail: (284) [user] symbol_concat($, _379900, 'ErrorType')
^  Redo: (283) [user] mfix_vars1('ErrorType', _372476)
^  Unify: (283) [user] mfix_vars1('ErrorType', _372476)
   Call: (284) [system] 'ErrorType'==true
^  Redo: (283) [user] mfix_vars1('ErrorType', _372476)
^  Unify: (283) [user] mfix_vars1('ErrorType', _372476)
   Call: (284) [system] 'ErrorType'==false
^  Redo: (283) [user] mfix_vars1('ErrorType', _372476)
^  Unify: (283) [user] mfix_vars1('ErrorType', _372476)
   Call: (284) [system] 'ErrorType'==[_391988, _391994]
^  Redo: (283) [user] mfix_vars1('ErrorType', _372476)
^  Unify: (283) [user] mfix_vars1('ErrorType', _372476)
   Call: (284) [system] is_list('ErrorType')
^  Redo: (283) [user] mfix_vars1('ErrorType', _372476)
^  Unify: (283) [user] mfix_vars1('ErrorType', _372476)
   Call: (284) [system] string('ErrorType')
^  Redo: (283) [user] mfix_vars1('ErrorType', _372476)
^  Unify: (283) [user] mfix_vars1('ErrorType', _372476)
   Call: (284) [system] compound('ErrorType')
^  Redo: (283) [user] mfix_vars1('ErrorType', _372476)
^  Unify: (283) [user] mfix_vars1('ErrorType', _372476)
^  Call: (284) [user] symbol('ErrorType')
^  Unify: (284) [user] symbol('ErrorType')
   Call: (285) [system] atom('ErrorType')
   Exit: (285) [system] atom('ErrorType')
^  Exit: (284) [user] symbol('ErrorType')
^  Unify: (283) [user] mfix_vars1('ErrorType', 'ErrorType')
^  Exit: (283) [user] mfix_vars1('ErrorType', 'ErrorType')
   Call: (283) [apply] apply:maplist_([], _372478, user:mfix_vars1)
   Unify: (283) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (283) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (282) [apply] apply:maplist_(['ErrorType'], ['ErrorType'], user:mfix_vars1)
   Exit: (281) [apply] apply:maplist_(['Atom', 'ErrorType'], ['Atom', 'ErrorType'], user:mfix_vars1)
   Exit: (280) [apply] apply:maplist_(['Atom', 'Atom', 'ErrorType'], ['Atom', 'Atom', 'ErrorType'], user:mfix_vars1)
   Exit: (279) [apply] apply:maplist_([->, 'Atom', 'Atom', 'ErrorType'], [->, 'Atom', 'Atom', 'ErrorType'], user:mfix_vars1)
^  Exit: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Atom', 'ErrorType'], [->, 'Atom', 'Atom', 'ErrorType'])
^  Exit: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'ErrorType'], [->, 'Atom', 'Atom', 'ErrorType'])
   Call: (277) [apply] apply:maplist_([], _212780, user:mfix_vars1)
   Unify: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (276) [apply] apply:maplist_([[->, 'Atom', 'Atom', 'ErrorType']], [[->, 'Atom', 'Atom', 'ErrorType']], user:mfix_vars1)
   Exit: (275) [apply] apply:maplist_(['Error', [->, 'Atom', 'Atom', 'ErrorType']], ['Error', [->, 'Atom', 'Atom', 'ErrorType']], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], user:mfix_vars1)
^  Exit: (273) [apply] apply:maplist(user:mfix_vars1, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Exit: (272) [user] mfix_vars1([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Exit: (271) [system] call(user:mfix_vars1, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Exit: (270) [system] once(user:call(mfix_vars1, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]))
   Call: (270) [system] [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]\=@=[:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]
^  Redo: (269) [user] trly(mfix_vars1, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _85532)
^  Unify: (269) [user] trly(mfix_vars1, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Exit: (269) [user] trly(mfix_vars1, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Exit: (268) [system] once(user:trly(mfix_vars1, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]))
^  Exit: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_c, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _432898))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_c, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _432898))
^  Call: (268) [user] once(user:trly(cons_to_c, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _432898))
^  Unify: (268) [system] once(user:trly(cons_to_c, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _432898))
^  Call: (269) [user] trly(cons_to_c, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _432898)
^  Unify: (269) [user] trly(cons_to_c, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _432898)
^  Call: (270) [user] once(call(cons_to_c, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _438484))
^  Unify: (270) [system] once(user:call(cons_to_c, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _438484))
^  Call: (271) [user] call(cons_to_c, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _438484)
^  Unify: (271) [system] call(user:cons_to_c, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _438484)
^  Call: (272) [user] cons_to_c([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _438484)
^  Unify: (272) [user] cons_to_c([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_c([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Exit: (271) [system] call(user:cons_to_c, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Exit: (270) [system] once(user:call(cons_to_c, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]))
   Call: (270) [system] [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]\=@=[:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]
^  Redo: (269) [user] trly(cons_to_c, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _432898)
^  Unify: (269) [user] trly(cons_to_c, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Exit: (269) [user] trly(cons_to_c, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Exit: (268) [system] once(user:trly(cons_to_c, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_c, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_l, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _79920))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_l, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _79920))
^  Call: (268) [user] once(user:trly(cons_to_l, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _79920))
^  Unify: (268) [system] once(user:trly(cons_to_l, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _79920))
^  Call: (269) [user] trly(cons_to_l, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _79920)
^  Unify: (269) [user] trly(cons_to_l, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _79920)
^  Call: (270) [user] once(call(cons_to_l, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _460804))
^  Unify: (270) [system] once(user:call(cons_to_l, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _460804))
^  Call: (271) [user] call(cons_to_l, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _460804)
^  Unify: (271) [system] call(user:cons_to_l, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _460804)
^  Call: (272) [user] cons_to_l([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _460804)
^  Unify: (272) [user] cons_to_l([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_l([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Exit: (271) [system] call(user:cons_to_l, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Exit: (270) [system] once(user:call(cons_to_l, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]))
   Call: (270) [system] [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]\=@=[:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]
^  Redo: (269) [user] trly(cons_to_l, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _79920)
^  Unify: (269) [user] trly(cons_to_l, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Exit: (269) [user] trly(cons_to_l, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Exit: (268) [system] once(user:trly(cons_to_l, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_l, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]))
^  Exit: (266) [user] untyped_to_metta([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Exit: (265) [system] call(user:untyped_to_metta, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Exit: (264) [system] once(user:call(untyped_to_metta, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]))
   Call: (264) [system] [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]\=@=[:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']]
^  Redo: (263) [user] trly(untyped_to_metta, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Exit: (263) [user] trly(untyped_to_metta, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Exit: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
   Call: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])))
   Unify: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])))
   Exit: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])))
^  Exit: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Exit: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Call: (257) [user] subst_vars([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _495112, [], _495114)
^  Unify: (257) [user] subst_vars([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [], [])
   Call: (258) [system] var([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Redo: (257) [user] subst_vars([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], _495112, [], _495114)
^  Unify: (257) [user] subst_vars([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [_498850|_498852], [], _495114)
^  Call: (258) [user] subst_vars(:, _498850, [], _499790)
^  Unify: (258) [user] subst_vars(:, :, [], [])
   Call: (259) [system] var(:)
^  Redo: (258) [user] subst_vars(:, _498850, [], _499790)
^  Unify: (258) [user] subst_vars(:, _498850, [], _499790)
   Call: (259) [system] atom(:)
   Exit: (259) [system] atom(:)
^  Call: (259) [user] symbol_concat($, _506308, :)
^  Unify: (259) [user] symbol_concat($, _506308, :)
   Call: (260) [system] atom_concat($, _506308, :)
   Fail: (260) [system] atom_concat($, _506308, :)
^  Fail: (259) [user] symbol_concat($, _506308, :)
^  Redo: (258) [user] subst_vars(:, _498850, [], _499790)
^  Unify: (258) [user] subst_vars(:, _498850, [], _499790)
   Call: (259) [system] compound(:)
^  Redo: (258) [user] subst_vars(:, _498850, [], _499790)
^  Unify: (258) [user] subst_vars(:, :, [], [])
^  Exit: (258) [user] subst_vars(:, :, [], [])
^  Call: (258) [user] subst_vars(['Error', [->, 'Atom', 'Atom', 'ErrorType']], _498852, [], _495114)
^  Unify: (258) [user] subst_vars(['Error', [->, 'Atom', 'Atom', 'ErrorType']], ['Error', [->, 'Atom', 'Atom', 'ErrorType']], [], [])
   Call: (259) [system] var(['Error', [->, 'Atom', 'Atom', 'ErrorType']])
^  Redo: (258) [user] subst_vars(['Error', [->, 'Atom', 'Atom', 'ErrorType']], _498852, [], _495114)
^  Unify: (258) [user] subst_vars(['Error', [->, 'Atom', 'Atom', 'ErrorType']], [_520308|_520310], [], _495114)
^  Call: (259) [user] subst_vars('Error', _520308, [], _521248)
^  Unify: (259) [user] subst_vars('Error', 'Error', [], [])
   Call: (260) [system] var('Error')
^  Redo: (259) [user] subst_vars('Error', _5966, [], _5970)
^  Unify: (259) [user] subst_vars('Error', _5966, [], _5970)
   Call: (260) [system] atom('Error')
   Exit: (260) [system] atom('Error')
^  Call: (260) [user] symbol_concat($, _9640, 'Error')
^  Unify: (260) [user] symbol_concat($, _9640, 'Error')
   Call: (261) [system] atom_concat($, _9640, 'Error')
   Fail: (261) [system] atom_concat($, _9640, 'Error')
^  Fail: (260) [user] symbol_concat($, _9640, 'Error')
^  Redo: (259) [user] subst_vars('Error', _5966, [], _5970)
^  Unify: (259) [user] subst_vars('Error', _5966, [], _5970)
   Call: (260) [system] compound('Error')
^  Redo: (259) [user] subst_vars('Error', _5966, [], _5970)
^  Unify: (259) [user] subst_vars('Error', 'Error', [], [])
^  Exit: (259) [user] subst_vars('Error', 'Error', [], [])
^  Call: (259) [user] subst_vars([[->, 'Atom', 'Atom', 'ErrorType']], _5968, [], _5954)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Atom', 'ErrorType']], [[->, 'Atom', 'Atom', 'ErrorType']], [], [])
   Call: (260) [system] var([[->, 'Atom', 'Atom', 'ErrorType']])
^  Redo: (259) [user] subst_vars([[->, 'Atom', 'Atom', 'ErrorType']], _5968, [], _5954)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Atom', 'ErrorType']], [_23640|_23642], [], _5954)
^  Call: (260) [user] subst_vars([->, 'Atom', 'Atom', 'ErrorType'], _23640, [], _24580)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Atom', 'ErrorType'], [->, 'Atom', 'Atom', 'ErrorType'], [], [])
   Call: (261) [system] var([->, 'Atom', 'Atom', 'ErrorType'])
^  Redo: (260) [user] subst_vars([->, 'Atom', 'Atom', 'ErrorType'], _23640, [], _24580)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Atom', 'ErrorType'], [_28316|_28318], [], _24580)
^  Call: (261) [user] subst_vars(->, _28316, [], _29256)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
   Call: (262) [system] var(->)
^  Redo: (261) [user] subst_vars(->, _28316, [], _29256)
^  Unify: (261) [user] subst_vars(->, _28316, [], _29256)
   Call: (262) [system] atom(->)
   Exit: (262) [system] atom(->)
^  Call: (262) [user] symbol_concat($, _35774, ->)
^  Unify: (262) [user] symbol_concat($, _35774, ->)
   Call: (263) [system] atom_concat($, _35774, ->)
   Fail: (263) [system] atom_concat($, _35774, ->)
^  Fail: (262) [user] symbol_concat($, _35774, ->)
^  Redo: (261) [user] subst_vars(->, _28316, [], _29256)
^  Unify: (261) [user] subst_vars(->, _28316, [], _29256)
   Call: (262) [system] compound(->)
^  Redo: (261) [user] subst_vars(->, _28316, [], _29256)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
^  Exit: (261) [user] subst_vars(->, ->, [], [])
^  Call: (261) [user] subst_vars(['Atom', 'Atom', 'ErrorType'], _28318, [], _24580)
^  Unify: (261) [user] subst_vars(['Atom', 'Atom', 'ErrorType'], ['Atom', 'Atom', 'ErrorType'], [], [])
   Call: (262) [system] var(['Atom', 'Atom', 'ErrorType'])
^  Redo: (261) [user] subst_vars(['Atom', 'Atom', 'ErrorType'], _28318, [], _24580)
^  Unify: (261) [user] subst_vars(['Atom', 'Atom', 'ErrorType'], [_49774|_49776], [], _24580)
^  Call: (262) [user] subst_vars('Atom', _49774, [], _50714)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (263) [system] var('Atom')
^  Redo: (262) [user] subst_vars('Atom', _49774, [], _50714)
^  Unify: (262) [user] subst_vars('Atom', _49774, [], _50714)
   Call: (263) [system] atom('Atom')
   Exit: (263) [system] atom('Atom')
^  Call: (263) [user] symbol_concat($, _57232, 'Atom')
^  Unify: (263) [user] symbol_concat($, _57232, 'Atom')
   Call: (264) [system] atom_concat($, _57232, 'Atom')
   Fail: (264) [system] atom_concat($, _57232, 'Atom')
^  Fail: (263) [user] symbol_concat($, _57232, 'Atom')
^  Redo: (262) [user] subst_vars('Atom', _49774, [], _50714)
^  Unify: (262) [user] subst_vars('Atom', _49774, [], _50714)
   Call: (263) [system] compound('Atom')
^  Redo: (262) [user] subst_vars('Atom', _49774, [], _50714)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (262) [user] subst_vars(['Atom', 'ErrorType'], _49776, [], _24580)
^  Unify: (262) [user] subst_vars(['Atom', 'ErrorType'], ['Atom', 'ErrorType'], [], [])
   Call: (263) [system] var(['Atom', 'ErrorType'])
^  Redo: (262) [user] subst_vars(['Atom', 'ErrorType'], _49776, [], _24580)
^  Unify: (262) [user] subst_vars(['Atom', 'ErrorType'], [_71232|_71234], [], _24580)
^  Call: (263) [user] subst_vars('Atom', _71232, [], _72172)
^  Unify: (263) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (264) [system] var('Atom')
^  Redo: (263) [user] subst_vars('Atom', _71232, [], _72172)
^  Unify: (263) [user] subst_vars('Atom', _71232, [], _72172)
   Call: (264) [system] atom('Atom')
   Exit: (264) [system] atom('Atom')
^  Call: (264) [user] symbol_concat($, _78690, 'Atom')
^  Unify: (264) [user] symbol_concat($, _78690, 'Atom')
   Call: (265) [system] atom_concat($, _78690, 'Atom')
   Fail: (265) [system] atom_concat($, _78690, 'Atom')
^  Fail: (264) [user] symbol_concat($, _78690, 'Atom')
^  Redo: (263) [user] subst_vars('Atom', _71232, [], _72172)
^  Unify: (263) [user] subst_vars('Atom', _71232, [], _72172)
   Call: (264) [system] compound('Atom')
^  Redo: (263) [user] subst_vars('Atom', _71232, [], _72172)
^  Unify: (263) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (263) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (263) [user] subst_vars(['ErrorType'], _71234, [], _24580)
^  Unify: (263) [user] subst_vars(['ErrorType'], ['ErrorType'], [], [])
   Call: (264) [system] var(['ErrorType'])
^  Redo: (263) [user] subst_vars(['ErrorType'], _71234, [], _24580)
^  Unify: (263) [user] subst_vars(['ErrorType'], [_92690|_92692], [], _24580)
^  Call: (264) [user] subst_vars('ErrorType', _92690, [], _93630)
^  Unify: (264) [user] subst_vars('ErrorType', 'ErrorType', [], [])
   Call: (265) [system] var('ErrorType')
^  Redo: (264) [user] subst_vars('ErrorType', _92690, [], _93630)
^  Unify: (264) [user] subst_vars('ErrorType', _92690, [], _93630)
   Call: (265) [system] atom('ErrorType')
   Exit: (265) [system] atom('ErrorType')
^  Call: (265) [user] symbol_concat($, _100148, 'ErrorType')
^  Unify: (265) [user] symbol_concat($, _100148, 'ErrorType')
   Call: (266) [system] atom_concat($, _100148, 'ErrorType')
   Fail: (266) [system] atom_concat($, _100148, 'ErrorType')
^  Fail: (265) [user] symbol_concat($, _100148, 'ErrorType')
^  Redo: (264) [user] subst_vars('ErrorType', _92690, [], _93630)
^  Unify: (264) [user] subst_vars('ErrorType', _92690, [], _93630)
   Call: (265) [system] compound('ErrorType')
^  Redo: (264) [user] subst_vars('ErrorType', _92690, [], _93630)
^  Unify: (264) [user] subst_vars('ErrorType', 'ErrorType', [], [])
^  Exit: (264) [user] subst_vars('ErrorType', 'ErrorType', [], [])
^  Call: (264) [user] subst_vars([], _92692, [], _24580)
^  Unify: (264) [user] subst_vars([], [], [], [])
   Call: (265) [system] var([])
^  Redo: (264) [user] subst_vars([], _92692, [], _24580)
^  Unify: (264) [user] subst_vars([], [], [], [])
^  Exit: (264) [user] subst_vars([], [], [], [])
^  Exit: (263) [user] subst_vars(['ErrorType'], ['ErrorType'], [], [])
^  Exit: (262) [user] subst_vars(['Atom', 'ErrorType'], ['Atom', 'ErrorType'], [], [])
^  Exit: (261) [user] subst_vars(['Atom', 'Atom', 'ErrorType'], ['Atom', 'Atom', 'ErrorType'], [], [])
^  Exit: (260) [user] subst_vars([->, 'Atom', 'Atom', 'ErrorType'], [->, 'Atom', 'Atom', 'ErrorType'], [], [])
^  Call: (260) [user] subst_vars([], _23642, [], _5954)
^  Unify: (260) [user] subst_vars([], [], [], [])
   Call: (261) [system] var([])
^  Redo: (260) [user] subst_vars([], _23642, [], _5954)
^  Unify: (260) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([], [], [], [])
^  Exit: (259) [user] subst_vars([[->, 'Atom', 'Atom', 'ErrorType']], [[->, 'Atom', 'Atom', 'ErrorType']], [], [])
^  Exit: (258) [user] subst_vars(['Error', [->, 'Atom', 'Atom', 'ErrorType']], ['Error', [->, 'Atom', 'Atom', 'ErrorType']], [], [])
^  Exit: (257) [user] subst_vars([:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [], [])
   Call: (257) [system] _128174=metta_file_buffer(+, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(18, 1, 18, 18))
   Exit: (257) [system] metta_file_buffer(+, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(18, 1, 18, 18))=metta_file_buffer(+, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(18, 1, 18, 18))
^  Call: (257) [user] assertz(metta_file_buffer(+, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(18, 1, 18, 18)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(18, 1, 18, 18)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(18, 1, 18, 18))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(18, 1, 18, 18))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(18, 1, 18, 18))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'Error', [->, 'Atom', 'Atom', 'ErrorType']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(18, 1, 18, 18))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
   Redo: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _178968)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _179906))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _179906)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 53)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _178968)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _178968)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_178968))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_178968))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_178968))
   Exit: (259) [system] nonvar(position(_178968))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(53, 2, 34, 53)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(53, 2, 34, 53))
   Call: (257) [user] current_read_mode(file, _199386)
   Unify: (257) [user] current_read_mode(file, _199386)
   Call: (258) [system] nb_current(file_mode, _199386)
   Redo: (257) [user] current_read_mode(file, _199386)
   Call: (258) [system] _199386=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _205836)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _205836)
^  Call: (258) [user] clause(t_l:s_reader_info(_205836), _207782, _207704)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _205836)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _205836)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _205836)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _205836)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _205836)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _205836)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _205836)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _205836)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _221612)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (260) [system] char_type('\n', space)
   Exit: (260) [system] char_type('\n', space)
   Call: (260) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (260) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _205836)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _205836)
   Call: (261) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _205836)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _205836)
   Call: (261) [system] peek_char((0x55aefe44e2f0), _231818)
   Exit: (261) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (261) [system] char_type('(', space)
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _205836)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _205836)
^  Call: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (262) [system] string((0x55aefe44e2f0))
^  Redo: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _205836)
^  Unify: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _205836)
^  Call: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _205836)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _205836)
   Call: (263) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _205836)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _205836)
   Call: (263) [system] peek_char((0x55aefe44e2f0), _247572)
   Exit: (263) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (263) [system] char_type('(', space)
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _205836)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _205836)
   Call: (263) [system] _252214=(0x55aefe44e2f0)
   Exit: (263) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (263) [user] once((read_position((0x55aefe44e2f0), _254082, _254084, _254086, _254088), read_sexpr((0x55aefe44e2f0), _254100), assertz(metta_file_comment(_254082, _254084, _254086, _254100, _254088))))
^  Unify: (263) [system] once(user:(read_position((0x55aefe44e2f0), _254082, _254084, _254086, _254088), read_sexpr((0x55aefe44e2f0), _254100), assertz(metta_file_comment(_254082, _254084, _254086, _254100, _254088))))
^  Call: (265) [user] read_position((0x55aefe44e2f0), _254082, _254084, _254086, _254088)
^  Unify: (265) [user] read_position((0x55aefe44e2f0), _254082, _254084, _254086, _254088)
   Call: (266) [system] stream_property((0x55aefe44e2f0), position(_254088))
   Unify: (266) [system] stream_property((0x55aefe44e2f0), position(_254088))
   Call: (267) [system] nonvar((0x55aefe44e2f0))
   Exit: (267) [system] nonvar((0x55aefe44e2f0))
   Call: (267) [system] nonvar(position(_254088))
   Exit: (267) [system] nonvar(position(_254088))
   Exit: (266) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(54, 3, 0, 54)))
   Call: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(54, 3, 0, 54), _254082)
   Unify: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(54, 3, 0, 54), _254082)
   Call: (267) [system] nonvar(line_count)
   Exit: (267) [system] nonvar(line_count)
   Call: (267) [$syspreds] stream_position_field(line_count, _268070)
   Unify: (267) [$syspreds] stream_position_field(line_count, 2)
   Exit: (267) [$syspreds] stream_position_field(line_count, 2)
   Call: (267) [system] arg(2, '$stream_position'(54, 3, 0, 54), _254082)
   Exit: (267) [system] arg(2, '$stream_position'(54, 3, 0, 54), 3)
   Exit: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(54, 3, 0, 54), 3)
   Call: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(54, 3, 0, 54), _254084)
   Unify: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(54, 3, 0, 54), _254084)
   Call: (267) [system] nonvar(line_position)
   Exit: (267) [system] nonvar(line_position)
   Call: (267) [$syspreds] stream_position_field(line_position, _277364)
   Unify: (267) [$syspreds] stream_position_field(line_position, 3)
   Exit: (267) [$syspreds] stream_position_field(line_position, 3)
   Call: (267) [system] arg(3, '$stream_position'(54, 3, 0, 54), _254084)
   Exit: (267) [system] arg(3, '$stream_position'(54, 3, 0, 54), 0)
   Exit: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(54, 3, 0, 54), 0)
   Call: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(54, 3, 0, 54), _254086)
   Unify: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(54, 3, 0, 54), _254086)
   Call: (267) [system] nonvar(char_count)
   Exit: (267) [system] nonvar(char_count)
   Call: (267) [$syspreds] stream_position_field(char_count, _286658)
   Unify: (267) [$syspreds] stream_position_field(char_count, 1)
   Exit: (267) [$syspreds] stream_position_field(char_count, 1)
   Call: (267) [system] arg(1, '$stream_position'(54, 3, 0, 54), _254086)
   Exit: (267) [system] arg(1, '$stream_position'(54, 3, 0, 54), 54)
   Exit: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(54, 3, 0, 54), 54)
^  Exit: (265) [user] read_position((0x55aefe44e2f0), 3, 0, 54, '$stream_position'(54, 3, 0, 54))
^  Call: (265) [user] read_sexpr((0x55aefe44e2f0), _254100)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _254100)
   Call: (266) [system] string((0x55aefe44e2f0))
^  Redo: (265) [user] read_sexpr((0x55aefe44e2f0), _254100)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _254100)
^  Call: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _254100)
^  Unify: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _254100)
^  Call: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _301528)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (268) [system] '('=(;)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', 'white')
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', end_of_line)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', space)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', cntrl)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (267) [system] get_char((0x55aefe44e2f0), _318312)
   Exit: (267) [system] get_char((0x55aefe44e2f0), '(')
   Call: (267) [system] '('='('
   Exit: (267) [system] '('='('
^  Call: (267) [user] read_list(')', (0x55aefe44e2f0), _254100)
^  Unify: (267) [user] read_list(')', (0x55aefe44e2f0), _254100)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _325738)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, 'white')
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, end_of_line)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, space)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _342522)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), :)
   Call: (268) [system] (:)=')'
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _254100)
   Call: (268) [system] (:)=end_of_file
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _254100)
^  Call: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _348100)
^  Unify: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _348100)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _351814)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, 'white')
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, end_of_line)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, space)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, cntrl)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] get_char((0x55aefe44e2f0), _368598)
   Exit: (269) [system] get_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)='('
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _348100)
   Call: (269) [system] (:)='['
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _348100)
   Call: (269) [system] (:)='{'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _348100)
   Call: (269) [system] (:)='"'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _348100)
   Call: (269) [system] (:)=!
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _348100)
   Call: (269) [system] (:)='\''
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _348100)
   Call: (269) [system] (:)='`'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _348100)
   Call: (269) [system] (:)=end_of_file
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _348100)
^  Call: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _348100)
^  Unify: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _348100)
^  Call: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _387208)
^  Unify: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _387208)
   Call: (271) [system] peek_char((0x55aefe44e2f0), _389074)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] is_delimiter(' ')
^  Unify: (271) [user] is_delimiter(' ')
   Call: (272) [system] char_type(' ', space)
   Exit: (272) [system] char_type(' ', space)
^  Exit: (271) [user] is_delimiter(' ')
   Call: (271) [system] _387208=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (270) [user] classify_and_convert_charseq(:, [], _348100)
^  Unify: (270) [user] classify_and_convert_charseq(:, [], _348100)
^  Call: (272) [system] setup_call_cleanup('$notrace'(_400240, _400242), once(user:catch(read_from_chars([:], _348100), _400216, fail)), '$restore_trace'(_400240, _400242))
^  Unify: (272) [system] setup_call_cleanup(system:'$notrace'(_400240, _400242), system:once(user:catch(read_from_chars([:], _348100), _400216, fail)), system:'$restore_trace'(_400240, _400242))
^  Call: (273) [system] sig_atomic(system:'$notrace'(_400240, _400242))
^  Exit: (272) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([:], :), _400216, fail)), system:'$restore_trace'(3, -1))
   Call: (271) [system] atomic(:)
   Exit: (271) [system] atomic(:)
^  Exit: (270) [user] classify_and_convert_charseq(:, [], :)
^  Exit: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, :)
^  Exit: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), :)
^  Call: (268) [user] read_list(')', (0x55aefe44e2f0), _408678)
^  Unify: (268) [user] read_list(')', (0x55aefe44e2f0), _408678)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _412392)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (270) [system] ' '=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(' ')
^  Unify: (270) [user] is_like_space(' ')
   Call: (271) [system] char_type(' ', 'white')
   Exit: (271) [system] char_type(' ', 'white')
^  Exit: (270) [user] is_like_space(' ')
   Call: (270) [system] get_char((0x55aefe44e2f0), _421050)
   Exit: (270) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _424678)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), 'R')
   Call: (271) [system] 'R'=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space('R')
^  Unify: (271) [user] is_like_space('R')
   Call: (272) [system] char_type('R', 'white')
^  Redo: (271) [user] is_like_space('R')
^  Unify: (271) [user] is_like_space('R')
   Call: (272) [system] char_type('R', end_of_line)
^  Redo: (271) [user] is_like_space('R')
^  Unify: (271) [user] is_like_space('R')
   Call: (272) [system] char_type('R', space)
^  Redo: (271) [user] is_like_space('R')
^  Unify: (271) [user] is_like_space('R')
   Call: (272) [system] char_type('R', cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _442386)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), 'R')
   Call: (269) [system] 'R'=')'
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _408678)
   Call: (269) [system] 'R'=end_of_file
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _408678)
^  Call: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _447964)
^  Unify: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _447964)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _451678)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), 'R')
   Call: (271) [system] 'R'=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space('R')
^  Unify: (271) [user] is_like_space('R')
   Call: (272) [system] char_type('R', 'white')
^  Redo: (271) [user] is_like_space('R')
^  Unify: (271) [user] is_like_space('R')
   Call: (272) [system] char_type('R', end_of_line)
^  Redo: (271) [user] is_like_space('R')
^  Unify: (271) [user] is_like_space('R')
   Call: (272) [system] char_type('R', space)
^  Redo: (271) [user] is_like_space('R')
^  Unify: (271) [user] is_like_space('R')
   Call: (272) [system] char_type('R', cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] get_char((0x55aefe44e2f0), _468462)
   Exit: (270) [system] get_char((0x55aefe44e2f0), 'R')
   Call: (270) [system] 'R'='('
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _447964)
   Call: (270) [system] 'R'='['
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _447964)
   Call: (270) [system] 'R'='{'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _447964)
   Call: (270) [system] 'R'='"'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _447964)
   Call: (270) [system] 'R'=!
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _447964)
   Call: (270) [system] 'R'='\''
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _447964)
   Call: (270) [system] 'R'='`'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _447964)
   Call: (270) [system] 'R'=end_of_file
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _447964)
^  Call: (270) [user] read_symbolic(')', (0x55aefe44e2f0), 'R', _447964)
^  Unify: (270) [user] read_symbolic(')', (0x55aefe44e2f0), 'R', _447964)
^  Call: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _487072)
^  Unify: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _487072)
   Call: (272) [system] peek_char((0x55aefe44e2f0), _488938)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (272) [user] is_delimiter(e)
^  Unify: (272) [user] is_delimiter(e)
   Call: (273) [system] char_type(e, space)
^  Redo: (272) [user] is_delimiter(e)
   Call: (273) [system] arg(_494578, v('(', ')', end_of_file), e)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _487072)
   Call: (272) [system] ')'==e
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _487072)
   Call: (272) [system] get_char((0x55aefe44e2f0), e)
   Exit: (272) [system] get_char((0x55aefe44e2f0), e)
   Call: (272) [system] e=(\)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _487072)
^  Call: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _501944)
^  Unify: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _501944)
   Call: (273) [system] peek_char((0x55aefe44e2f0), _503810)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (273) [user] is_delimiter(t)
^  Unify: (273) [user] is_delimiter(t)
   Call: (274) [system] char_type(t, space)
^  Redo: (273) [user] is_delimiter(t)
   Call: (274) [system] arg(_509450, v('(', ')', end_of_file), t)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _501944)
   Call: (273) [system] ')'==t
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _501944)
   Call: (273) [system] get_char((0x55aefe44e2f0), t)
   Exit: (273) [system] get_char((0x55aefe44e2f0), t)
   Call: (273) [system] t=(\)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _501944)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _516816)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _516816)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _518682)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), u)
^  Call: (274) [user] is_delimiter(u)
^  Unify: (274) [user] is_delimiter(u)
   Call: (275) [system] char_type(u, space)
^  Redo: (274) [user] is_delimiter(u)
   Call: (275) [system] arg(_6434, v('(', ')', end_of_file), u)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _5998)
   Call: (274) [system] ')'==u
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _5998)
   Call: (274) [system] get_char((0x55aefe44e2f0), u)
   Exit: (274) [system] get_char((0x55aefe44e2f0), u)
   Call: (274) [system] u=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _5998)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _13800)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _13800)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _15666)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (275) [user] is_delimiter(r)
^  Unify: (275) [user] is_delimiter(r)
   Call: (276) [system] char_type(r, space)
^  Redo: (275) [user] is_delimiter(r)
   Call: (276) [system] arg(_21306, v('(', ')', end_of_file), r)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _13800)
   Call: (275) [system] ')'==r
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _13800)
   Call: (275) [system] get_char((0x55aefe44e2f0), r)
   Exit: (275) [system] get_char((0x55aefe44e2f0), r)
   Call: (275) [system] r=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _13800)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _28672)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _28672)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _30538)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (276) [user] is_delimiter(n)
^  Unify: (276) [user] is_delimiter(n)
   Call: (277) [system] char_type(n, space)
^  Redo: (276) [user] is_delimiter(n)
   Call: (277) [system] arg(_36178, v('(', ')', end_of_file), n)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _28672)
   Call: (276) [system] ')'==n
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _28672)
   Call: (276) [system] get_char((0x55aefe44e2f0), n)
   Exit: (276) [system] get_char((0x55aefe44e2f0), n)
   Call: (276) [system] n=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _28672)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _43544)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _43544)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _45410)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'T')
^  Call: (277) [user] is_delimiter('T')
^  Unify: (277) [user] is_delimiter('T')
   Call: (278) [system] char_type('T', space)
^  Redo: (277) [user] is_delimiter('T')
   Call: (278) [system] arg(_51050, v('(', ')', end_of_file), 'T')
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _43544)
   Call: (277) [system] ')'=='T'
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _43544)
   Call: (277) [system] get_char((0x55aefe44e2f0), 'T')
   Exit: (277) [system] get_char((0x55aefe44e2f0), 'T')
   Call: (277) [system] 'T'=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _43544)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _58416)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _58416)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _60282)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), y)
^  Call: (278) [user] is_delimiter(y)
^  Unify: (278) [user] is_delimiter(y)
   Call: (279) [system] char_type(y, space)
^  Redo: (278) [user] is_delimiter(y)
   Call: (279) [system] arg(_65922, v('(', ')', end_of_file), y)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _58416)
   Call: (278) [system] ')'==y
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _58416)
   Call: (278) [system] get_char((0x55aefe44e2f0), y)
   Exit: (278) [system] get_char((0x55aefe44e2f0), y)
   Call: (278) [system] y=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _58416)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _73288)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _73288)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _75154)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (279) [user] is_delimiter(p)
^  Unify: (279) [user] is_delimiter(p)
   Call: (280) [system] char_type(p, space)
^  Redo: (279) [user] is_delimiter(p)
   Call: (280) [system] arg(_80794, v('(', ')', end_of_file), p)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _73288)
   Call: (279) [system] ')'==p
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _73288)
   Call: (279) [system] get_char((0x55aefe44e2f0), p)
   Exit: (279) [system] get_char((0x55aefe44e2f0), p)
   Call: (279) [system] p=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _73288)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _88160)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _88160)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _90026)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (280) [user] is_delimiter(e)
^  Unify: (280) [user] is_delimiter(e)
   Call: (281) [system] char_type(e, space)
^  Redo: (280) [user] is_delimiter(e)
   Call: (281) [system] arg(_95666, v('(', ')', end_of_file), e)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _88160)
   Call: (280) [system] ')'==e
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _88160)
   Call: (280) [system] get_char((0x55aefe44e2f0), e)
   Exit: (280) [system] get_char((0x55aefe44e2f0), e)
   Call: (280) [system] e=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _88160)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _103032)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _103032)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _104898)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (281) [user] is_delimiter(' ')
^  Unify: (281) [user] is_delimiter(' ')
   Call: (282) [system] char_type(' ', space)
   Exit: (282) [system] char_type(' ', space)
^  Exit: (281) [user] is_delimiter(' ')
   Call: (281) [system] _103032=[]
   Exit: (281) [system] []=[]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (280) [system] _88160=[e]
   Exit: (280) [system] [e]=[e]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e])
   Call: (279) [system] _73288=[p, e]
   Exit: (279) [system] [p, e]=[p, e]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, e])
   Call: (278) [system] _58416=[y, p, e]
   Exit: (278) [system] [y, p, e]=[y, p, e]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [y, p, e])
   Call: (277) [system] _43544=['T', y, p, e]
   Exit: (277) [system] ['T', y, p, e]=['T', y, p, e]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), ['T', y, p, e])
   Call: (276) [system] _28672=[n, 'T', y, p, e]
   Exit: (276) [system] [n, 'T', y, p, e]=[n, 'T', y, p, e]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n, 'T', y, p, e])
   Call: (275) [system] _13800=[r, n, 'T', y, p, e]
   Exit: (275) [system] [r, n, 'T', y, p, e]=[r, n, 'T', y, p, e]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, n, 'T', y, p, e])
   Call: (274) [system] _5998=[u, r, n, 'T', y, p, e]
   Exit: (274) [system] [u, r, n, 'T', y, p, e]=[u, r, n, 'T', y, p, e]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [u, r, n, 'T', y, p, e])
   Call: (273) [system] _5994=[t, u, r, n, 'T', y, p, e]
   Exit: (273) [system] [t, u, r, n, 'T', y, p, e]=[t, u, r, n, 'T', y, p, e]
^  Exit: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, u, r, n, 'T', y, p, e])
   Call: (272) [system] _5990=[e, t, u, r, n, 'T', y, p, e]
   Exit: (272) [system] [e, t, u, r, n, 'T', y, p, e]=[e, t, u, r, n, 'T', y, p, e]
^  Exit: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, t, u, r, n, 'T', y, p, e])
^  Call: (271) [user] classify_and_convert_charseq('R', [e, t, u, r, n, 'T', y, p, e], _5986)
^  Unify: (271) [user] classify_and_convert_charseq('R', [e, t, u, r, n, 'T', y, p, e], _5986)
^  Call: (273) [system] setup_call_cleanup('$notrace'(_141210, _141212), once(user:catch(read_from_chars(['R', e, t, u, r, n, 'T', y, p, e], _5986), _141186, fail)), '$restore_trace'(_141210, _141212))
^  Unify: (273) [system] setup_call_cleanup(system:'$notrace'(_141210, _141212), system:once(user:catch(read_from_chars(['R', e, t, u, r, n, 'T', y, p, e], _5986), _141186, fail)), system:'$restore_trace'(_141210, _141212))
^  Call: (274) [system] sig_atomic(system:'$notrace'(_141210, _141212))
^  Exit: (273) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['R', e, t, u, r, n, 'T', y, p, e], _5986), _141186, fail)), system:'$restore_trace'(3, -1))
   Call: (272) [system] atomic(_5986)
^  Redo: (271) [user] classify_and_convert_charseq('R', [e, t, u, r, n, 'T', y, p, e], _5986)
^  Unify: (271) [user] classify_and_convert_charseq('R', [e, t, u, r, n, 'T', y, p, e], _5986)
   Call: (272) [system] atom_chars(_5986, ['R', e, t, u, r, n, 'T', y, p, e])
   Exit: (272) [system] atom_chars('ReturnType', ['R', e, t, u, r, n, 'T', y, p, e])
^  Exit: (271) [user] classify_and_convert_charseq('R', [e, t, u, r, n, 'T', y, p, e], 'ReturnType')
^  Exit: (270) [user] read_symbolic(')', (0x55aefe44e2f0), 'R', 'ReturnType')
^  Exit: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), 'ReturnType')
^  Call: (269) [user] read_list(')', (0x55aefe44e2f0), _152464)
^  Unify: (269) [user] read_list(')', (0x55aefe44e2f0), _152464)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _156178)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (271) [system] ' '=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(' ')
^  Unify: (271) [user] is_like_space(' ')
   Call: (272) [system] char_type(' ', 'white')
   Exit: (272) [system] char_type(' ', 'white')
^  Exit: (271) [user] is_like_space(' ')
   Call: (271) [system] get_char((0x55aefe44e2f0), _164836)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _168464)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), 'T')
   Call: (272) [system] 'T'=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('T')
^  Unify: (272) [user] is_like_space('T')
   Call: (273) [system] char_type('T', 'white')
^  Redo: (272) [user] is_like_space('T')
^  Unify: (272) [user] is_like_space('T')
   Call: (273) [system] char_type('T', end_of_line)
^  Redo: (272) [user] is_like_space('T')
^  Unify: (272) [user] is_like_space('T')
   Call: (273) [system] char_type('T', space)
^  Redo: (272) [user] is_like_space('T')
^  Unify: (272) [user] is_like_space('T')
   Call: (273) [system] char_type('T', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _186172)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), 'T')
   Call: (270) [system] 'T'=')'
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _152464)
   Call: (270) [system] 'T'=end_of_file
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _152464)
^  Call: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _191750)
^  Unify: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _191750)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _195464)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), 'T')
   Call: (272) [system] 'T'=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('T')
^  Unify: (272) [user] is_like_space('T')
   Call: (273) [system] char_type('T', 'white')
^  Redo: (272) [user] is_like_space('T')
^  Unify: (272) [user] is_like_space('T')
   Call: (273) [system] char_type('T', end_of_line)
^  Redo: (272) [user] is_like_space('T')
^  Unify: (272) [user] is_like_space('T')
   Call: (273) [system] char_type('T', space)
^  Redo: (272) [user] is_like_space('T')
^  Unify: (272) [user] is_like_space('T')
   Call: (273) [system] char_type('T', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] get_char((0x55aefe44e2f0), _212248)
   Exit: (271) [system] get_char((0x55aefe44e2f0), 'T')
   Call: (271) [system] 'T'='('
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _191750)
   Call: (271) [system] 'T'='['
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _191750)
   Call: (271) [system] 'T'='{'
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _191750)
   Call: (271) [system] 'T'='"'
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _191750)
   Call: (271) [system] 'T'=!
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _191750)
   Call: (271) [system] 'T'='\''
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _191750)
   Call: (271) [system] 'T'='`'
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _191750)
   Call: (271) [system] 'T'=end_of_file
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _191750)
^  Call: (271) [user] read_symbolic(')', (0x55aefe44e2f0), 'T', _191750)
^  Unify: (271) [user] read_symbolic(')', (0x55aefe44e2f0), 'T', _191750)
^  Call: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _230858)
^  Unify: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _230858)
   Call: (273) [system] peek_char((0x55aefe44e2f0), _232724)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), y)
^  Call: (273) [user] is_delimiter(y)
^  Unify: (273) [user] is_delimiter(y)
   Call: (274) [system] char_type(y, space)
^  Redo: (273) [user] is_delimiter(y)
   Call: (274) [system] arg(_238364, v('(', ')', end_of_file), y)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _230858)
   Call: (273) [system] ')'==y
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _230858)
   Call: (273) [system] get_char((0x55aefe44e2f0), y)
   Exit: (273) [system] get_char((0x55aefe44e2f0), y)
   Call: (273) [system] y=(\)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _230858)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _245730)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _245730)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _247596)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (274) [user] is_delimiter(p)
^  Unify: (274) [user] is_delimiter(p)
   Call: (275) [system] char_type(p, space)
^  Redo: (274) [user] is_delimiter(p)
   Call: (275) [system] arg(_253236, v('(', ')', end_of_file), p)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _245730)
   Call: (274) [system] ')'==p
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _245730)
   Call: (274) [system] get_char((0x55aefe44e2f0), p)
   Exit: (274) [system] get_char((0x55aefe44e2f0), p)
   Call: (274) [system] p=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _245730)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _260602)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _260602)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _262468)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (275) [user] is_delimiter(e)
^  Unify: (275) [user] is_delimiter(e)
   Call: (276) [system] char_type(e, space)
^  Redo: (275) [user] is_delimiter(e)
   Call: (276) [system] arg(_268108, v('(', ')', end_of_file), e)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _260602)
   Call: (275) [system] ')'==e
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _260602)
   Call: (275) [system] get_char((0x55aefe44e2f0), e)
   Exit: (275) [system] get_char((0x55aefe44e2f0), e)
   Call: (275) [system] e=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _260602)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275474)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275474)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _277340)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (276) [user] is_delimiter(')')
^  Unify: (276) [user] is_delimiter(')')
   Call: (277) [system] char_type(')', space)
^  Redo: (276) [user] is_delimiter(')')
   Call: (277) [system] arg(_282980, v('(', ')', end_of_file), ')')
   Exit: (277) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (276) [user] is_delimiter(')')
   Call: (276) [system] _275474=[]
   Exit: (276) [system] []=[]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (275) [system] _260602=[e]
   Exit: (275) [system] [e]=[e]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e])
   Call: (274) [system] _245730=[p, e]
   Exit: (274) [system] [p, e]=[p, e]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, e])
   Call: (273) [system] _230858=[y, p, e]
   Exit: (273) [system] [y, p, e]=[y, p, e]
^  Exit: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [y, p, e])
^  Call: (272) [user] classify_and_convert_charseq('T', [y, p, e], _191750)
^  Unify: (272) [user] classify_and_convert_charseq('T', [y, p, e], _191750)
^  Call: (274) [system] setup_call_cleanup('$notrace'(_298756, _298758), once(user:catch(read_from_chars(['T', y, p, e], _191750), _298732, fail)), '$restore_trace'(_298756, _298758))
^  Unify: (274) [system] setup_call_cleanup(system:'$notrace'(_298756, _298758), system:once(user:catch(read_from_chars(['T', y, p, e], _191750), _298732, fail)), system:'$restore_trace'(_298756, _298758))
^  Call: (275) [system] sig_atomic(system:'$notrace'(_298756, _298758))
^  Exit: (274) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['T', y, p, e], _191750), _298732, fail)), system:'$restore_trace'(3, -1))
   Call: (273) [system] atomic(_191750)
^  Redo: (272) [user] classify_and_convert_charseq('T', [y, p, e], _191750)
^  Unify: (272) [user] classify_and_convert_charseq('T', [y, p, e], _191750)
   Call: (273) [system] atom_chars(_191750, ['T', y, p, e])
   Exit: (273) [system] atom_chars('Type', ['T', y, p, e])
^  Exit: (272) [user] classify_and_convert_charseq('T', [y, p, e], 'Type')
^  Exit: (271) [user] read_symbolic(')', (0x55aefe44e2f0), 'T', 'Type')
^  Exit: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Type')
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _310010)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _310010)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _313724)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (272) [system] ')'=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', 'white')
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', end_of_line)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', space)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _330508)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (271) [system] ')'=')'
   Exit: (271) [system] ')'=')'
   Call: (271) [system] get_char((0x55aefe44e2f0), _334298)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ')')
   Call: (271) [system] _310010=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (270) [system] _152464=['Type']
   Exit: (270) [system] ['Type']=['Type']
^  Exit: (269) [user] read_list(')', (0x55aefe44e2f0), ['Type'])
   Call: (269) [system] _5982=['ReturnType', 'Type']
   Exit: (269) [system] ['ReturnType', 'Type']=['ReturnType', 'Type']
^  Exit: (268) [user] read_list(')', (0x55aefe44e2f0), ['ReturnType', 'Type'])
   Call: (268) [system] _5942=[:, 'ReturnType', 'Type']
   Exit: (268) [system] [:, 'ReturnType', 'Type']=[:, 'ReturnType', 'Type']
^  Exit: (267) [user] read_list(')', (0x55aefe44e2f0), [:, 'ReturnType', 'Type'])
^  Exit: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), [:, 'ReturnType', 'Type'])
^  Exit: (265) [user] read_sexpr((0x55aefe44e2f0), [:, 'ReturnType', 'Type'])
^  Call: (265) [user] assertz(metta_file_comment(3, 0, 54, [:, 'ReturnType', 'Type'], '$stream_position'(54, 3, 0, 54)))
^  Exit: (265) [user] assertz(metta_file_comment(3, 0, 54, [:, 'ReturnType', 'Type'], '$stream_position'(54, 3, 0, 54)))
^  Exit: (263) [system] once(user:(read_position((0x55aefe44e2f0), 3, 0, 54, '$stream_position'(54, 3, 0, 54)), read_sexpr((0x55aefe44e2f0), [:, 'ReturnType', 'Type']), assertz(metta_file_comment(3, 0, 54, [:, 'ReturnType', 'Type'], '$stream_position'(54, 3, 0, 54)))))
   Call: (263) [system] fail
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Call: (263) [user] retract(metta_file_comment(_354672, _354674, _354676, _354678, _354680))
^  Exit: (263) [user] retract(metta_file_comment(3, 0, 54, [:, 'ReturnType', 'Type'], '$stream_position'(54, 3, 0, 54)))
^  Call: (263) [user] trly(untyped_to_metta, [:, 'ReturnType', 'Type'], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, 'ReturnType', 'Type'], _5908)
^  Call: (264) [user] once(call(untyped_to_metta, [:, 'ReturnType', 'Type'], _358440))
^  Unify: (264) [system] once(user:call(untyped_to_metta, [:, 'ReturnType', 'Type'], _358440))
^  Call: (265) [user] call(untyped_to_metta, [:, 'ReturnType', 'Type'], _358440)
^  Unify: (265) [system] call(user:untyped_to_metta, [:, 'ReturnType', 'Type'], _358440)
^  Call: (266) [user] untyped_to_metta([:, 'ReturnType', 'Type'], _358440)
^  Unify: (266) [user] untyped_to_metta([:, 'ReturnType', 'Type'], _358440)
^  Call: (267) [user] must_det_ll(trly(mfix_vars1, [:, 'ReturnType', 'Type'], _364052))
^  Unify: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, 'ReturnType', 'Type'], _364052))
^  Call: (268) [user] once(user:trly(mfix_vars1, [:, 'ReturnType', 'Type'], _364052))
^  Unify: (268) [system] once(user:trly(mfix_vars1, [:, 'ReturnType', 'Type'], _364052))
^  Call: (269) [user] trly(mfix_vars1, [:, 'ReturnType', 'Type'], _364052)
^  Unify: (269) [user] trly(mfix_vars1, [:, 'ReturnType', 'Type'], _364052)
^  Call: (270) [user] once(call(mfix_vars1, [:, 'ReturnType', 'Type'], _369638))
^  Unify: (270) [system] once(user:call(mfix_vars1, [:, 'ReturnType', 'Type'], _369638))
^  Call: (271) [user] call(mfix_vars1, [:, 'ReturnType', 'Type'], _369638)
^  Unify: (271) [system] call(user:mfix_vars1, [:, 'ReturnType', 'Type'], _369638)
^  Call: (272) [user] mfix_vars1([:, 'ReturnType', 'Type'], _369638)
^  Unify: (272) [user] mfix_vars1([:, 'ReturnType', 'Type'], _369638)
   Call: (273) [system] var([:, 'ReturnType', 'Type'])
^  Redo: (272) [user] mfix_vars1([:, 'ReturnType', 'Type'], _369638)
^  Unify: (272) [user] mfix_vars1([:, 'ReturnType', 'Type'], '$VAR'(_377098))
   Call: (273) [system] atom([:, 'ReturnType', 'Type'])
^  Redo: (272) [user] mfix_vars1([:, 'ReturnType', 'Type'], _369638)
^  Unify: (272) [user] mfix_vars1([:, 'ReturnType', 'Type'], _369638)
   Call: (273) [system] [:, 'ReturnType', 'Type']==true
^  Redo: (272) [user] mfix_vars1([:, 'ReturnType', 'Type'], _369638)
^  Unify: (272) [user] mfix_vars1([:, 'ReturnType', 'Type'], _369638)
   Call: (273) [system] [:, 'ReturnType', 'Type']==false
^  Redo: (272) [user] mfix_vars1([:, 'ReturnType', 'Type'], _369638)
^  Unify: (272) [user] mfix_vars1([:, 'ReturnType', 'Type'], _369638)
   Call: (273) [system] (:)=='['
^  Redo: (272) [user] mfix_vars1([:, 'ReturnType', 'Type'], _369638)
^  Unify: (272) [user] mfix_vars1([:, 'ReturnType', 'Type'], _369638)
   Call: (273) [system] (:)=='{'
^  Redo: (272) [user] mfix_vars1([:, 'ReturnType', 'Type'], _369638)
^  Unify: (272) [user] mfix_vars1([:, 'ReturnType', 'Type'], _369638)
   Call: (273) [system] is_list(['ReturnType', 'Type'])
   Exit: (273) [system] is_list(['ReturnType', 'Type'])
   Call: (273) [lists] lists:last(['ReturnType', 'Type'], _393792)
   Unify: (273) [lists] lists:last(['ReturnType', 'Type'], _393792)
   Call: (274) [lists] lists:last_(['Type'], 'ReturnType', _393792)
   Unify: (274) [lists] lists:last_(['Type'], 'ReturnType', _393792)
   Call: (275) [lists] lists:last_([], 'Type', _393792)
   Unify: (275) [lists] lists:last_([], 'Type', 'Type')
   Exit: (275) [lists] lists:last_([], 'Type', 'Type')
   Exit: (274) [lists] lists:last_(['Type'], 'ReturnType', 'Type')
   Exit: (273) [lists] lists:last(['ReturnType', 'Type'], 'Type')
   Call: (273) [system] 'Type'=='}'
^  Redo: (272) [user] mfix_vars1([:, 'ReturnType', 'Type'], _369638)
^  Unify: (272) [user] mfix_vars1([:, 'ReturnType', 'Type'], _369638)
   Call: (273) [system] [:, 'ReturnType', 'Type']==[_404956, _404962]
^  Redo: (272) [user] mfix_vars1([:, 'ReturnType', 'Type'], _369638)
^  Unify: (272) [user] mfix_vars1([:, 'ReturnType', 'Type'], _369638)
   Call: (273) [system] fail
^  Redo: (272) [user] mfix_vars1([:, 'ReturnType', 'Type'], _369638)
^  Unify: (272) [user] mfix_vars1([:, 'ReturnType', 'Type'], _369638)
   Call: (273) [system] is_list([:, 'ReturnType', 'Type'])
   Exit: (273) [system] is_list([:, 'ReturnType', 'Type'])
^  Call: (273) [user] apply:maplist(mfix_vars1, [:, 'ReturnType', 'Type'], _369638)
^  Unify: (273) [apply] apply:maplist(user:mfix_vars1, [:, 'ReturnType', 'Type'], _369638)
   Call: (274) [apply] apply:maplist_([:, 'ReturnType', 'Type'], _369638, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([:, 'ReturnType', 'Type'], [_415186|_415188], user:mfix_vars1)
^  Call: (275) [user] mfix_vars1(:, _415186)
^  Unify: (275) [user] mfix_vars1(:, _415186)
   Call: (276) [system] var(:)
^  Redo: (275) [user] mfix_vars1(:, _415186)
^  Unify: (275) [user] mfix_vars1(:, '$VAR'(_419832))
   Call: (276) [system] atom(:)
   Exit: (276) [system] atom(:)
^  Call: (276) [user] symbol_concat($, _422610, :)
^  Unify: (276) [user] symbol_concat($, _422610, :)
   Call: (277) [system] atom_concat($, _422610, :)
   Fail: (277) [system] atom_concat($, _422610, :)
^  Fail: (276) [user] symbol_concat($, _422610, :)
^  Redo: (275) [user] mfix_vars1(:, _415186)
^  Unify: (275) [user] mfix_vars1(:, _415186)
   Call: (276) [system] (:)==true
^  Redo: (275) [user] mfix_vars1(:, _415186)
^  Unify: (275) [user] mfix_vars1(:, _415186)
   Call: (276) [system] (:)==false
^  Redo: (275) [user] mfix_vars1(:, _415186)
^  Unify: (275) [user] mfix_vars1(:, _415186)
   Call: (276) [system] (:)==[_434698, _434704]
^  Redo: (275) [user] mfix_vars1(:, _415186)
^  Unify: (275) [user] mfix_vars1(:, _415186)
   Call: (276) [system] is_list(:)
^  Redo: (275) [user] mfix_vars1(:, _415186)
^  Unify: (275) [user] mfix_vars1(:, _415186)
   Call: (276) [system] string(:)
^  Redo: (275) [user] mfix_vars1(:, _415186)
^  Unify: (275) [user] mfix_vars1(:, _415186)
   Call: (276) [system] compound(:)
^  Redo: (275) [user] mfix_vars1(:, _415186)
^  Unify: (275) [user] mfix_vars1(:, _415186)
^  Call: (276) [user] symbol(:)
^  Unify: (276) [user] symbol(:)
   Call: (277) [system] atom(:)
   Exit: (277) [system] atom(:)
^  Exit: (276) [user] symbol(:)
^  Unify: (275) [user] mfix_vars1(:, :)
^  Exit: (275) [user] mfix_vars1(:, :)
   Call: (275) [apply] apply:maplist_(['ReturnType', 'Type'], _415188, user:mfix_vars1)
   Unify: (275) [apply] apply:maplist_(['ReturnType', 'Type'], [_453242|_453244], user:mfix_vars1)
^  Call: (276) [user] mfix_vars1('ReturnType', _453242)
^  Unify: (276) [user] mfix_vars1('ReturnType', _453242)
   Call: (277) [system] var('ReturnType')
^  Redo: (276) [user] mfix_vars1('ReturnType', _453242)
^  Unify: (276) [user] mfix_vars1('ReturnType', '$VAR'(_457888))
   Call: (277) [system] atom('ReturnType')
   Exit: (277) [system] atom('ReturnType')
^  Call: (277) [user] symbol_concat($, _460666, 'ReturnType')
^  Unify: (277) [user] symbol_concat($, _460666, 'ReturnType')
   Call: (278) [system] atom_concat($, _460666, 'ReturnType')
   Fail: (278) [system] atom_concat($, _460666, 'ReturnType')
^  Fail: (277) [user] symbol_concat($, _460666, 'ReturnType')
^  Redo: (276) [user] mfix_vars1('ReturnType', _453242)
^  Unify: (276) [user] mfix_vars1('ReturnType', _453242)
   Call: (277) [system] 'ReturnType'==true
^  Redo: (276) [user] mfix_vars1('ReturnType', _453242)
^  Unify: (276) [user] mfix_vars1('ReturnType', _453242)
   Call: (277) [system] 'ReturnType'==false
^  Redo: (276) [user] mfix_vars1('ReturnType', _453242)
^  Unify: (276) [user] mfix_vars1('ReturnType', _453242)
   Call: (277) [system] 'ReturnType'==[_472754, _472760]
^  Redo: (276) [user] mfix_vars1('ReturnType', _453242)
^  Unify: (276) [user] mfix_vars1('ReturnType', _453242)
   Call: (277) [system] is_list('ReturnType')
^  Redo: (276) [user] mfix_vars1('ReturnType', _453242)
^  Unify: (276) [user] mfix_vars1('ReturnType', _453242)
   Call: (277) [system] string('ReturnType')
^  Redo: (276) [user] mfix_vars1('ReturnType', _453242)
^  Unify: (276) [user] mfix_vars1('ReturnType', _453242)
   Call: (277) [system] compound('ReturnType')
^  Redo: (276) [user] mfix_vars1('ReturnType', _453242)
^  Unify: (276) [user] mfix_vars1('ReturnType', _453242)
^  Call: (277) [user] symbol('ReturnType')
^  Unify: (277) [user] symbol('ReturnType')
   Call: (278) [system] atom('ReturnType')
   Exit: (278) [system] atom('ReturnType')
^  Exit: (277) [user] symbol('ReturnType')
^  Unify: (276) [user] mfix_vars1('ReturnType', 'ReturnType')
^  Exit: (276) [user] mfix_vars1('ReturnType', 'ReturnType')
   Call: (276) [apply] apply:maplist_(['Type'], _453244, user:mfix_vars1)
   Unify: (276) [apply] apply:maplist_(['Type'], [_491298|_491300], user:mfix_vars1)
^  Call: (277) [user] mfix_vars1('Type', _491298)
^  Unify: (277) [user] mfix_vars1('Type', _491298)
   Call: (278) [system] var('Type')
^  Redo: (277) [user] mfix_vars1('Type', _491298)
^  Unify: (277) [user] mfix_vars1('Type', '$VAR'(_495944))
   Call: (278) [system] atom('Type')
   Exit: (278) [system] atom('Type')
^  Call: (278) [user] symbol_concat($, _498722, 'Type')
^  Unify: (278) [user] symbol_concat($, _498722, 'Type')
   Call: (279) [system] atom_concat($, _498722, 'Type')
   Fail: (279) [system] atom_concat($, _498722, 'Type')
^  Fail: (278) [user] symbol_concat($, _498722, 'Type')
^  Redo: (277) [user] mfix_vars1('Type', _491298)
^  Unify: (277) [user] mfix_vars1('Type', _491298)
   Call: (278) [system] 'Type'==true
^  Redo: (277) [user] mfix_vars1('Type', _491298)
^  Unify: (277) [user] mfix_vars1('Type', _491298)
   Call: (278) [system] 'Type'==false
^  Redo: (277) [user] mfix_vars1('Type', _491298)
^  Unify: (277) [user] mfix_vars1('Type', _491298)
   Call: (278) [system] 'Type'==[_510810, _510816]
^  Redo: (277) [user] mfix_vars1('Type', _491298)
^  Unify: (277) [user] mfix_vars1('Type', _491298)
   Call: (278) [system] is_list('Type')
^  Redo: (277) [user] mfix_vars1('Type', _491298)
^  Unify: (277) [user] mfix_vars1('Type', _491298)
   Call: (278) [system] string('Type')
^  Redo: (277) [user] mfix_vars1('Type', _491298)
^  Unify: (277) [user] mfix_vars1('Type', _491298)
   Call: (278) [system] compound('Type')
^  Redo: (277) [user] mfix_vars1('Type', _491298)
^  Unify: (277) [user] mfix_vars1('Type', _491298)
^  Call: (278) [user] symbol('Type')
^  Unify: (278) [user] symbol('Type')
   Call: (279) [system] atom('Type')
   Exit: (279) [system] atom('Type')
^  Exit: (278) [user] symbol('Type')
^  Unify: (277) [user] mfix_vars1('Type', 'Type')
^  Exit: (277) [user] mfix_vars1('Type', 'Type')
   Call: (277) [apply] apply:maplist_([], _6008, user:mfix_vars1)
   Unify: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (276) [apply] apply:maplist_(['Type'], ['Type'], user:mfix_vars1)
   Exit: (275) [apply] apply:maplist_(['ReturnType', 'Type'], ['ReturnType', 'Type'], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type'], user:mfix_vars1)
^  Exit: (273) [apply] apply:maplist(user:mfix_vars1, [:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type'])
^  Exit: (272) [user] mfix_vars1([:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type'])
^  Exit: (271) [system] call(user:mfix_vars1, [:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type'])
^  Exit: (270) [system] once(user:call(mfix_vars1, [:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type']))
   Call: (270) [system] [:, 'ReturnType', 'Type']\=@=[:, 'ReturnType', 'Type']
^  Redo: (269) [user] trly(mfix_vars1, [:, 'ReturnType', 'Type'], _5958)
^  Unify: (269) [user] trly(mfix_vars1, [:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type'])
^  Exit: (269) [user] trly(mfix_vars1, [:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type'])
^  Exit: (268) [system] once(user:trly(mfix_vars1, [:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type']))
^  Exit: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type']))
^  Call: (267) [user] must_det_ll(trly(cons_to_c, [:, 'ReturnType', 'Type'], _25370))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_c, [:, 'ReturnType', 'Type'], _25370))
^  Call: (268) [user] once(user:trly(cons_to_c, [:, 'ReturnType', 'Type'], _25370))
^  Unify: (268) [system] once(user:trly(cons_to_c, [:, 'ReturnType', 'Type'], _25370))
^  Call: (269) [user] trly(cons_to_c, [:, 'ReturnType', 'Type'], _25370)
^  Unify: (269) [user] trly(cons_to_c, [:, 'ReturnType', 'Type'], _25370)
^  Call: (270) [user] once(call(cons_to_c, [:, 'ReturnType', 'Type'], _30956))
^  Unify: (270) [system] once(user:call(cons_to_c, [:, 'ReturnType', 'Type'], _30956))
^  Call: (271) [user] call(cons_to_c, [:, 'ReturnType', 'Type'], _30956)
^  Unify: (271) [system] call(user:cons_to_c, [:, 'ReturnType', 'Type'], _30956)
^  Call: (272) [user] cons_to_c([:, 'ReturnType', 'Type'], _30956)
^  Unify: (272) [user] cons_to_c([:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type'])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_c([:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type'])
^  Exit: (271) [system] call(user:cons_to_c, [:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type'])
^  Exit: (270) [system] once(user:call(cons_to_c, [:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type']))
   Call: (270) [system] [:, 'ReturnType', 'Type']\=@=[:, 'ReturnType', 'Type']
^  Redo: (269) [user] trly(cons_to_c, [:, 'ReturnType', 'Type'], _25370)
^  Unify: (269) [user] trly(cons_to_c, [:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type'])
^  Exit: (269) [user] trly(cons_to_c, [:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type'])
^  Exit: (268) [system] once(user:trly(cons_to_c, [:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type']))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_c, [:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type']))
^  Call: (267) [user] must_det_ll(trly(cons_to_l, [:, 'ReturnType', 'Type'], _5938))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_l, [:, 'ReturnType', 'Type'], _5938))
^  Call: (268) [user] once(user:trly(cons_to_l, [:, 'ReturnType', 'Type'], _5938))
^  Unify: (268) [system] once(user:trly(cons_to_l, [:, 'ReturnType', 'Type'], _5938))
^  Call: (269) [user] trly(cons_to_l, [:, 'ReturnType', 'Type'], _5938)
^  Unify: (269) [user] trly(cons_to_l, [:, 'ReturnType', 'Type'], _5938)
^  Call: (270) [user] once(call(cons_to_l, [:, 'ReturnType', 'Type'], _53276))
^  Unify: (270) [system] once(user:call(cons_to_l, [:, 'ReturnType', 'Type'], _53276))
^  Call: (271) [user] call(cons_to_l, [:, 'ReturnType', 'Type'], _53276)
^  Unify: (271) [system] call(user:cons_to_l, [:, 'ReturnType', 'Type'], _53276)
^  Call: (272) [user] cons_to_l([:, 'ReturnType', 'Type'], _53276)
^  Unify: (272) [user] cons_to_l([:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type'])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_l([:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type'])
^  Exit: (271) [system] call(user:cons_to_l, [:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type'])
^  Exit: (270) [system] once(user:call(cons_to_l, [:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type']))
   Call: (270) [system] [:, 'ReturnType', 'Type']\=@=[:, 'ReturnType', 'Type']
^  Redo: (269) [user] trly(cons_to_l, [:, 'ReturnType', 'Type'], _5938)
^  Unify: (269) [user] trly(cons_to_l, [:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type'])
^  Exit: (269) [user] trly(cons_to_l, [:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type'])
^  Exit: (268) [system] once(user:trly(cons_to_l, [:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type']))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_l, [:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type']))
^  Exit: (266) [user] untyped_to_metta([:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type'])
^  Exit: (265) [system] call(user:untyped_to_metta, [:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type'])
^  Exit: (264) [system] once(user:call(untyped_to_metta, [:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type']))
   Call: (264) [system] [:, 'ReturnType', 'Type']\=@=[:, 'ReturnType', 'Type']
^  Redo: (263) [user] trly(untyped_to_metta, [:, 'ReturnType', 'Type'], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type'])
^  Exit: (263) [user] trly(untyped_to_metta, [:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type'])
^  Exit: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'ReturnType', 'Type'])
   Call: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'ReturnType', 'Type'])))
   Unify: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'ReturnType', 'Type'])))
   Exit: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'ReturnType', 'Type'])))
^  Exit: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'ReturnType', 'Type'])
^  Exit: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'ReturnType', 'Type'])
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'ReturnType', 'Type'])
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'ReturnType', 'Type'])))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'ReturnType', 'Type'])))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'ReturnType', 'Type'])))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'ReturnType', 'Type'])
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), [:, 'ReturnType', 'Type'])
^  Call: (257) [user] subst_vars([:, 'ReturnType', 'Type'], _87584, [], _87586)
^  Unify: (257) [user] subst_vars([:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type'], [], [])
   Call: (258) [system] var([:, 'ReturnType', 'Type'])
^  Redo: (257) [user] subst_vars([:, 'ReturnType', 'Type'], _87584, [], _87586)
^  Unify: (257) [user] subst_vars([:, 'ReturnType', 'Type'], [_91322|_91324], [], _87586)
^  Call: (258) [user] subst_vars(:, _91322, [], _92262)
^  Unify: (258) [user] subst_vars(:, :, [], [])
   Call: (259) [system] var(:)
^  Redo: (258) [user] subst_vars(:, _91322, [], _92262)
^  Unify: (258) [user] subst_vars(:, _91322, [], _92262)
   Call: (259) [system] atom(:)
   Exit: (259) [system] atom(:)
^  Call: (259) [user] symbol_concat($, _98780, :)
^  Unify: (259) [user] symbol_concat($, _98780, :)
   Call: (260) [system] atom_concat($, _98780, :)
   Fail: (260) [system] atom_concat($, _98780, :)
^  Fail: (259) [user] symbol_concat($, _98780, :)
^  Redo: (258) [user] subst_vars(:, _91322, [], _92262)
^  Unify: (258) [user] subst_vars(:, _91322, [], _92262)
   Call: (259) [system] compound(:)
^  Redo: (258) [user] subst_vars(:, _91322, [], _92262)
^  Unify: (258) [user] subst_vars(:, :, [], [])
^  Exit: (258) [user] subst_vars(:, :, [], [])
^  Call: (258) [user] subst_vars(['ReturnType', 'Type'], _91324, [], _87586)
^  Unify: (258) [user] subst_vars(['ReturnType', 'Type'], ['ReturnType', 'Type'], [], [])
   Call: (259) [system] var(['ReturnType', 'Type'])
^  Redo: (258) [user] subst_vars(['ReturnType', 'Type'], _91324, [], _87586)
^  Unify: (258) [user] subst_vars(['ReturnType', 'Type'], [_112780|_112782], [], _87586)
^  Call: (259) [user] subst_vars('ReturnType', _112780, [], _113720)
^  Unify: (259) [user] subst_vars('ReturnType', 'ReturnType', [], [])
   Call: (260) [system] var('ReturnType')
^  Redo: (259) [user] subst_vars('ReturnType', _112780, [], _113720)
^  Unify: (259) [user] subst_vars('ReturnType', _112780, [], _113720)
   Call: (260) [system] atom('ReturnType')
   Exit: (260) [system] atom('ReturnType')
^  Call: (260) [user] symbol_concat($, _120238, 'ReturnType')
^  Unify: (260) [user] symbol_concat($, _120238, 'ReturnType')
   Call: (261) [system] atom_concat($, _120238, 'ReturnType')
   Fail: (261) [system] atom_concat($, _120238, 'ReturnType')
^  Fail: (260) [user] symbol_concat($, _120238, 'ReturnType')
^  Redo: (259) [user] subst_vars('ReturnType', _112780, [], _113720)
^  Unify: (259) [user] subst_vars('ReturnType', _112780, [], _113720)
   Call: (260) [system] compound('ReturnType')
^  Redo: (259) [user] subst_vars('ReturnType', _112780, [], _113720)
^  Unify: (259) [user] subst_vars('ReturnType', 'ReturnType', [], [])
^  Exit: (259) [user] subst_vars('ReturnType', 'ReturnType', [], [])
^  Call: (259) [user] subst_vars(['Type'], _112782, [], _87586)
^  Unify: (259) [user] subst_vars(['Type'], ['Type'], [], [])
   Call: (260) [system] var(['Type'])
^  Redo: (259) [user] subst_vars(['Type'], _112782, [], _87586)
^  Unify: (259) [user] subst_vars(['Type'], [_134238|_134240], [], _87586)
^  Call: (260) [user] subst_vars('Type', _134238, [], _135178)
^  Unify: (260) [user] subst_vars('Type', 'Type', [], [])
   Call: (261) [system] var('Type')
^  Redo: (260) [user] subst_vars('Type', _134238, [], _135178)
^  Unify: (260) [user] subst_vars('Type', _134238, [], _135178)
   Call: (261) [system] atom('Type')
   Exit: (261) [system] atom('Type')
^  Call: (261) [user] symbol_concat($, _141696, 'Type')
^  Unify: (261) [user] symbol_concat($, _141696, 'Type')
   Call: (262) [system] atom_concat($, _141696, 'Type')
   Fail: (262) [system] atom_concat($, _141696, 'Type')
^  Fail: (261) [user] symbol_concat($, _141696, 'Type')
^  Redo: (260) [user] subst_vars('Type', _134238, [], _135178)
^  Unify: (260) [user] subst_vars('Type', _134238, [], _135178)
   Call: (261) [system] compound('Type')
^  Redo: (260) [user] subst_vars('Type', _134238, [], _135178)
^  Unify: (260) [user] subst_vars('Type', 'Type', [], [])
^  Exit: (260) [user] subst_vars('Type', 'Type', [], [])
^  Call: (260) [user] subst_vars([], _134240, [], _87586)
^  Unify: (260) [user] subst_vars([], [], [], [])
   Call: (261) [system] var([])
^  Redo: (260) [user] subst_vars([], _134240, [], _87586)
^  Unify: (260) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([], [], [], [])
^  Exit: (259) [user] subst_vars(['Type'], ['Type'], [], [])
^  Exit: (258) [user] subst_vars(['ReturnType', 'Type'], ['ReturnType', 'Type'], [], [])
^  Exit: (257) [user] subst_vars([:, 'ReturnType', 'Type'], [:, 'ReturnType', 'Type'], [], [])
   Call: (257) [system] _160374=metta_file_buffer(+, [:, 'ReturnType', 'Type'], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(53, 2, 34, 53))
   Exit: (257) [system] metta_file_buffer(+, [:, 'ReturnType', 'Type'], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(53, 2, 34, 53))=metta_file_buffer(+, [:, 'ReturnType', 'Type'], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(53, 2, 34, 53))
^  Call: (257) [user] assertz(metta_file_buffer(+, [:, 'ReturnType', 'Type'], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(53, 2, 34, 53)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, [:, 'ReturnType', 'Type'], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(53, 2, 34, 53)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'ReturnType', 'Type'], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(53, 2, 34, 53))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'ReturnType', 'Type'], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(53, 2, 34, 53))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'ReturnType', 'Type'], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(53, 2, 34, 53))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'ReturnType', 'Type'], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(53, 2, 34, 53))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
   Redo: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _211168)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _212106))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _212106)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 73)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _211168)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _211168)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_211168))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_211168))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_211168))
   Exit: (259) [system] nonvar(position(_211168))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(73, 3, 19, 73)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(73, 3, 19, 73))
   Call: (257) [user] current_read_mode(file, _231586)
   Unify: (257) [user] current_read_mode(file, _231586)
   Call: (258) [system] nb_current(file_mode, _231586)
   Redo: (257) [user] current_read_mode(file, _231586)
   Call: (258) [system] _231586=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _238036)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _238036)
^  Call: (258) [user] clause(t_l:s_reader_info(_238036), _239982, _239904)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _238036)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _238036)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _238036)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _238036)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _238036)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _238036)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _238036)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _238036)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _253812)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (260) [system] char_type('\n', space)
   Exit: (260) [system] char_type('\n', space)
   Call: (260) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (260) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _238036)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _238036)
   Call: (261) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _238036)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _238036)
   Call: (261) [system] peek_char((0x55aefe44e2f0), _264018)
   Exit: (261) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (261) [system] char_type('(', space)
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _238036)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _238036)
^  Call: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (262) [system] string((0x55aefe44e2f0))
^  Redo: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _238036)
^  Unify: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _238036)
^  Call: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _238036)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _238036)
   Call: (263) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _238036)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _238036)
   Call: (263) [system] peek_char((0x55aefe44e2f0), _279772)
   Exit: (263) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (263) [system] char_type('(', space)
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _238036)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _238036)
   Call: (263) [system] _284414=(0x55aefe44e2f0)
   Exit: (263) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (263) [user] once((read_position((0x55aefe44e2f0), _286282, _286284, _286286, _286288), read_sexpr((0x55aefe44e2f0), _286300), assertz(metta_file_comment(_286282, _286284, _286286, _286300, _286288))))
^  Unify: (263) [system] once(user:(read_position((0x55aefe44e2f0), _286282, _286284, _286286, _286288), read_sexpr((0x55aefe44e2f0), _286300), assertz(metta_file_comment(_286282, _286284, _286286, _286300, _286288))))
^  Call: (265) [user] read_position((0x55aefe44e2f0), _286282, _286284, _286286, _286288)
^  Unify: (265) [user] read_position((0x55aefe44e2f0), _286282, _286284, _286286, _286288)
   Call: (266) [system] stream_property((0x55aefe44e2f0), position(_286288))
   Unify: (266) [system] stream_property((0x55aefe44e2f0), position(_286288))
   Call: (267) [system] nonvar((0x55aefe44e2f0))
   Exit: (267) [system] nonvar((0x55aefe44e2f0))
   Call: (267) [system] nonvar(position(_286288))
   Exit: (267) [system] nonvar(position(_286288))
   Exit: (266) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(74, 4, 0, 74)))
   Call: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(74, 4, 0, 74), _286282)
   Unify: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(74, 4, 0, 74), _286282)
   Call: (267) [system] nonvar(line_count)
   Exit: (267) [system] nonvar(line_count)
   Call: (267) [$syspreds] stream_position_field(line_count, _300270)
   Unify: (267) [$syspreds] stream_position_field(line_count, 2)
   Exit: (267) [$syspreds] stream_position_field(line_count, 2)
   Call: (267) [system] arg(2, '$stream_position'(74, 4, 0, 74), _286282)
   Exit: (267) [system] arg(2, '$stream_position'(74, 4, 0, 74), 4)
   Exit: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(74, 4, 0, 74), 4)
   Call: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(74, 4, 0, 74), _286284)
   Unify: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(74, 4, 0, 74), _286284)
   Call: (267) [system] nonvar(line_position)
   Exit: (267) [system] nonvar(line_position)
   Call: (267) [$syspreds] stream_position_field(line_position, _309564)
   Unify: (267) [$syspreds] stream_position_field(line_position, 3)
   Exit: (267) [$syspreds] stream_position_field(line_position, 3)
   Call: (267) [system] arg(3, '$stream_position'(74, 4, 0, 74), _286284)
   Exit: (267) [system] arg(3, '$stream_position'(74, 4, 0, 74), 0)
   Exit: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(74, 4, 0, 74), 0)
   Call: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(74, 4, 0, 74), _286286)
   Unify: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(74, 4, 0, 74), _286286)
   Call: (267) [system] nonvar(char_count)
   Exit: (267) [system] nonvar(char_count)
   Call: (267) [$syspreds] stream_position_field(char_count, _318858)
   Unify: (267) [$syspreds] stream_position_field(char_count, 1)
   Exit: (267) [$syspreds] stream_position_field(char_count, 1)
   Call: (267) [system] arg(1, '$stream_position'(74, 4, 0, 74), _286286)
   Exit: (267) [system] arg(1, '$stream_position'(74, 4, 0, 74), 74)
   Exit: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(74, 4, 0, 74), 74)
^  Exit: (265) [user] read_position((0x55aefe44e2f0), 4, 0, 74, '$stream_position'(74, 4, 0, 74))
^  Call: (265) [user] read_sexpr((0x55aefe44e2f0), _286300)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _286300)
   Call: (266) [system] string((0x55aefe44e2f0))
^  Redo: (265) [user] read_sexpr((0x55aefe44e2f0), _286300)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _286300)
^  Call: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _286300)
^  Unify: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _286300)
^  Call: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _333728)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (268) [system] '('=(;)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', 'white')
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', end_of_line)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', space)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', cntrl)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (267) [system] get_char((0x55aefe44e2f0), _350512)
   Exit: (267) [system] get_char((0x55aefe44e2f0), '(')
   Call: (267) [system] '('='('
   Exit: (267) [system] '('='('
^  Call: (267) [user] read_list(')', (0x55aefe44e2f0), _286300)
^  Unify: (267) [user] read_list(')', (0x55aefe44e2f0), _286300)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _357938)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, 'white')
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, end_of_line)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, space)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _374722)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), :)
   Call: (268) [system] (:)=')'
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _286300)
   Call: (268) [system] (:)=end_of_file
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _286300)
^  Call: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _380300)
^  Unify: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _380300)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _384014)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, 'white')
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, end_of_line)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, space)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, cntrl)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] get_char((0x55aefe44e2f0), _400798)
   Exit: (269) [system] get_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)='('
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _380300)
   Call: (269) [system] (:)='['
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _380300)
   Call: (269) [system] (:)='{'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _380300)
   Call: (269) [system] (:)='"'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _380300)
   Call: (269) [system] (:)=!
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _380300)
   Call: (269) [system] (:)='\''
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _380300)
   Call: (269) [system] (:)='`'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _380300)
   Call: (269) [system] (:)=end_of_file
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _380300)
^  Call: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _380300)
^  Unify: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _380300)
^  Call: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _419408)
^  Unify: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _419408)
   Call: (271) [system] peek_char((0x55aefe44e2f0), _421274)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] is_delimiter(' ')
^  Unify: (271) [user] is_delimiter(' ')
   Call: (272) [system] char_type(' ', space)
   Exit: (272) [system] char_type(' ', space)
^  Exit: (271) [user] is_delimiter(' ')
   Call: (271) [system] _419408=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (270) [user] classify_and_convert_charseq(:, [], _380300)
^  Unify: (270) [user] classify_and_convert_charseq(:, [], _380300)
^  Call: (272) [system] setup_call_cleanup('$notrace'(_432440, _432442), once(user:catch(read_from_chars([:], _380300), _432416, fail)), '$restore_trace'(_432440, _432442))
^  Unify: (272) [system] setup_call_cleanup(system:'$notrace'(_432440, _432442), system:once(user:catch(read_from_chars([:], _380300), _432416, fail)), system:'$restore_trace'(_432440, _432442))
^  Call: (273) [system] sig_atomic(system:'$notrace'(_432440, _432442))
^  Exit: (272) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([:], :), _432416, fail)), system:'$restore_trace'(3, -1))
   Call: (271) [system] atomic(:)
   Exit: (271) [system] atomic(:)
^  Exit: (270) [user] classify_and_convert_charseq(:, [], :)
^  Exit: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, :)
^  Exit: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), :)
^  Call: (268) [user] read_list(')', (0x55aefe44e2f0), _440878)
^  Unify: (268) [user] read_list(')', (0x55aefe44e2f0), _440878)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _444592)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (270) [system] ' '=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(' ')
^  Unify: (270) [user] is_like_space(' ')
   Call: (271) [system] char_type(' ', 'white')
   Exit: (271) [system] char_type(' ', 'white')
^  Exit: (270) [user] is_like_space(' ')
   Call: (270) [system] get_char((0x55aefe44e2f0), _453250)
   Exit: (270) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _456878)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), r)
   Call: (271) [system] r=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(r)
^  Unify: (271) [user] is_like_space(r)
   Call: (272) [system] char_type(r, 'white')
^  Redo: (271) [user] is_like_space(r)
^  Unify: (271) [user] is_like_space(r)
   Call: (272) [system] char_type(r, end_of_line)
^  Redo: (271) [user] is_like_space(r)
^  Unify: (271) [user] is_like_space(r)
   Call: (272) [system] char_type(r, space)
^  Redo: (271) [user] is_like_space(r)
^  Unify: (271) [user] is_like_space(r)
   Call: (272) [system] char_type(r, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _474586)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), r)
   Call: (269) [system] r=')'
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _440878)
   Call: (269) [system] r=end_of_file
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _440878)
^  Call: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _480164)
^  Unify: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _480164)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _483878)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), r)
   Call: (271) [system] r=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(r)
^  Unify: (271) [user] is_like_space(r)
   Call: (272) [system] char_type(r, 'white')
^  Redo: (271) [user] is_like_space(r)
^  Unify: (271) [user] is_like_space(r)
   Call: (272) [system] char_type(r, end_of_line)
^  Redo: (271) [user] is_like_space(r)
^  Unify: (271) [user] is_like_space(r)
   Call: (272) [system] char_type(r, space)
^  Redo: (271) [user] is_like_space(r)
^  Unify: (271) [user] is_like_space(r)
   Call: (272) [system] char_type(r, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] get_char((0x55aefe44e2f0), _500662)
   Exit: (270) [system] get_char((0x55aefe44e2f0), r)
   Call: (270) [system] r='('
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _480164)
   Call: (270) [system] r='['
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _480164)
   Call: (270) [system] r='{'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _480164)
   Call: (270) [system] r='"'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _480164)
   Call: (270) [system] r=!
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _480164)
   Call: (270) [system] r='\''
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _480164)
   Call: (270) [system] r='`'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _480164)
   Call: (270) [system] r=end_of_file
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _480164)
^  Call: (270) [user] read_symbolic(')', (0x55aefe44e2f0), r, _480164)
^  Unify: (270) [user] read_symbolic(')', (0x55aefe44e2f0), r, _480164)
^  Call: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _519272)
^  Unify: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _519272)
   Call: (272) [system] peek_char((0x55aefe44e2f0), _521138)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (272) [user] is_delimiter(e)
^  Unify: (272) [user] is_delimiter(e)
   Call: (273) [system] char_type(e, space)
^  Redo: (272) [user] is_delimiter(e)
   Call: (273) [system] arg(_8786, v('(', ')', end_of_file), e)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _5990)
   Call: (272) [system] ')'==e
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _5990)
   Call: (272) [system] get_char((0x55aefe44e2f0), e)
   Exit: (272) [system] get_char((0x55aefe44e2f0), e)
   Call: (272) [system] e=(\)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _5990)
^  Call: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _16152)
^  Unify: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _16152)
   Call: (273) [system] peek_char((0x55aefe44e2f0), _18018)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (273) [user] is_delimiter(t)
^  Unify: (273) [user] is_delimiter(t)
   Call: (274) [system] char_type(t, space)
^  Redo: (273) [user] is_delimiter(t)
   Call: (274) [system] arg(_23658, v('(', ')', end_of_file), t)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _16152)
   Call: (273) [system] ')'==t
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _16152)
   Call: (273) [system] get_char((0x55aefe44e2f0), t)
   Exit: (273) [system] get_char((0x55aefe44e2f0), t)
   Call: (273) [system] t=(\)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _16152)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31024)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31024)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _32890)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), u)
^  Call: (274) [user] is_delimiter(u)
^  Unify: (274) [user] is_delimiter(u)
   Call: (275) [system] char_type(u, space)
^  Redo: (274) [user] is_delimiter(u)
   Call: (275) [system] arg(_38530, v('(', ')', end_of_file), u)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31024)
   Call: (274) [system] ')'==u
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31024)
   Call: (274) [system] get_char((0x55aefe44e2f0), u)
   Exit: (274) [system] get_char((0x55aefe44e2f0), u)
   Call: (274) [system] u=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31024)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _45896)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _45896)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _47762)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (275) [user] is_delimiter(r)
^  Unify: (275) [user] is_delimiter(r)
   Call: (276) [system] char_type(r, space)
^  Redo: (275) [user] is_delimiter(r)
   Call: (276) [system] arg(_53402, v('(', ')', end_of_file), r)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _45896)
   Call: (275) [system] ')'==r
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _45896)
   Call: (275) [system] get_char((0x55aefe44e2f0), r)
   Exit: (275) [system] get_char((0x55aefe44e2f0), r)
   Call: (275) [system] r=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _45896)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _60768)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _60768)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _62634)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (276) [user] is_delimiter(n)
^  Unify: (276) [user] is_delimiter(n)
   Call: (277) [system] char_type(n, space)
^  Redo: (276) [user] is_delimiter(n)
   Call: (277) [system] arg(_68274, v('(', ')', end_of_file), n)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _60768)
   Call: (276) [system] ')'==n
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _60768)
   Call: (276) [system] get_char((0x55aefe44e2f0), n)
   Exit: (276) [system] get_char((0x55aefe44e2f0), n)
   Call: (276) [system] n=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _60768)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _75640)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _75640)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _77506)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (277) [user] is_delimiter(' ')
^  Unify: (277) [user] is_delimiter(' ')
   Call: (278) [system] char_type(' ', space)
   Exit: (278) [system] char_type(' ', space)
^  Exit: (277) [user] is_delimiter(' ')
   Call: (277) [system] _75640=[]
   Exit: (277) [system] []=[]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (276) [system] _60768=[n]
   Exit: (276) [system] [n]=[n]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (275) [system] _45896=[r, n]
   Exit: (275) [system] [r, n]=[r, n]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, n])
   Call: (274) [system] _31024=[u, r, n]
   Exit: (274) [system] [u, r, n]=[u, r, n]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [u, r, n])
   Call: (273) [system] _16152=[t, u, r, n]
   Exit: (273) [system] [t, u, r, n]=[t, u, r, n]
^  Exit: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, u, r, n])
   Call: (272) [system] _5990=[e, t, u, r, n]
   Exit: (272) [system] [e, t, u, r, n]=[e, t, u, r, n]
^  Exit: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, t, u, r, n])
^  Call: (271) [user] classify_and_convert_charseq(r, [e, t, u, r, n], _5986)
^  Unify: (271) [user] classify_and_convert_charseq(r, [e, t, u, r, n], _5986)
^  Call: (273) [system] setup_call_cleanup('$notrace'(_102642, _102644), once(user:catch(read_from_chars([r, e, t, u, r, n], _5986), _102618, fail)), '$restore_trace'(_102642, _102644))
^  Unify: (273) [system] setup_call_cleanup(system:'$notrace'(_102642, _102644), system:once(user:catch(read_from_chars([r, e, t, u, r, n], _5986), _102618, fail)), system:'$restore_trace'(_102642, _102644))
^  Call: (274) [system] sig_atomic(system:'$notrace'(_102642, _102644))
^  Exit: (273) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([r, e, t, u, r, n], return), _102618, fail)), system:'$restore_trace'(3, -1))
   Call: (272) [system] atomic(return)
   Exit: (272) [system] atomic(return)
^  Exit: (271) [user] classify_and_convert_charseq(r, [e, t, u, r, n], return)
^  Exit: (270) [user] read_symbolic(')', (0x55aefe44e2f0), r, return)
^  Exit: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), return)
^  Call: (269) [user] read_list(')', (0x55aefe44e2f0), _111080)
^  Unify: (269) [user] read_list(')', (0x55aefe44e2f0), _111080)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _114794)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (271) [system] ' '=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(' ')
^  Unify: (271) [user] is_like_space(' ')
   Call: (272) [system] char_type(' ', 'white')
   Exit: (272) [system] char_type(' ', 'white')
^  Exit: (271) [user] is_like_space(' ')
   Call: (271) [system] get_char((0x55aefe44e2f0), _123452)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _127080)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _144788)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (270) [system] '('=')'
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _111080)
   Call: (270) [system] '('=end_of_file
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _111080)
^  Call: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _150366)
^  Unify: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _150366)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _154080)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] get_char((0x55aefe44e2f0), _170864)
   Exit: (271) [system] get_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('='('
   Exit: (271) [system] '('='('
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _150366)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _150366)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _178290)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, 'white')
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, end_of_line)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, space)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _195074)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), -)
   Call: (272) [system] (-)=')'
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _150366)
   Call: (272) [system] (-)=end_of_file
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _150366)
^  Call: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _200652)
^  Unify: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _200652)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _204366)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, 'white')
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, end_of_line)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, space)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] get_char((0x55aefe44e2f0), _221150)
   Exit: (273) [system] get_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)='('
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _200652)
   Call: (273) [system] (-)='['
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _200652)
   Call: (273) [system] (-)='{'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _200652)
   Call: (273) [system] (-)='"'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _200652)
   Call: (273) [system] (-)=!
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _200652)
   Call: (273) [system] (-)='\''
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _200652)
   Call: (273) [system] (-)='`'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _200652)
   Call: (273) [system] (-)=end_of_file
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _200652)
^  Call: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _200652)
^  Unify: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _200652)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _239760)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _239760)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _241626)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), >)
^  Call: (275) [user] is_delimiter(>)
^  Unify: (275) [user] is_delimiter(>)
   Call: (276) [system] char_type(>, space)
^  Redo: (275) [user] is_delimiter(>)
   Call: (276) [system] arg(_247266, v('(', ')', end_of_file), >)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _239760)
   Call: (275) [system] ')'==(>)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _239760)
   Call: (275) [system] get_char((0x55aefe44e2f0), >)
   Exit: (275) [system] get_char((0x55aefe44e2f0), >)
   Call: (275) [system] (>)=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _239760)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _254632)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _254632)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _256498)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] is_delimiter(' ')
^  Unify: (276) [user] is_delimiter(' ')
   Call: (277) [system] char_type(' ', space)
   Exit: (277) [system] char_type(' ', space)
^  Exit: (276) [user] is_delimiter(' ')
   Call: (276) [system] _254632=[]
   Exit: (276) [system] []=[]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (275) [system] _239760=[>]
   Exit: (275) [system] [>]=[>]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [>])
^  Call: (274) [user] classify_and_convert_charseq(-, [>], _200652)
^  Unify: (274) [user] classify_and_convert_charseq(-, [>], _200652)
^  Call: (276) [system] setup_call_cleanup('$notrace'(_270458, _270460), once(user:catch(read_from_chars([-, >], _200652), _270434, fail)), '$restore_trace'(_270458, _270460))
^  Unify: (276) [system] setup_call_cleanup(system:'$notrace'(_270458, _270460), system:once(user:catch(read_from_chars([-, >], _200652), _270434, fail)), system:'$restore_trace'(_270458, _270460))
^  Call: (277) [system] sig_atomic(system:'$notrace'(_270458, _270460))
^  Exit: (276) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([-, >], ->), _270434, fail)), system:'$restore_trace'(3, -1))
   Call: (275) [system] atomic(->)
   Exit: (275) [system] atomic(->)
^  Exit: (274) [user] classify_and_convert_charseq(-, [>], ->)
^  Exit: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, ->)
^  Exit: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), ->)
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _278896)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _278896)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _282610)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (274) [system] ' '=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(' ')
^  Unify: (274) [user] is_like_space(' ')
   Call: (275) [system] char_type(' ', 'white')
   Exit: (275) [system] char_type(' ', 'white')
^  Exit: (274) [user] is_like_space(' ')
   Call: (274) [system] get_char((0x55aefe44e2f0), _291268)
   Exit: (274) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _294896)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', 'white')
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', end_of_line)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', space)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _312604)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (273) [system] 'A'=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _278896)
   Call: (273) [system] 'A'=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _278896)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _318182)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _318182)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _321896)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', 'white')
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', end_of_line)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', space)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _338680)
   Exit: (274) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (274) [system] 'A'='('
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _318182)
   Call: (274) [system] 'A'='['
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _318182)
   Call: (274) [system] 'A'='{'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _318182)
   Call: (274) [system] 'A'='"'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _318182)
   Call: (274) [system] 'A'=!
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _318182)
   Call: (274) [system] 'A'='\''
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _318182)
   Call: (274) [system] 'A'='`'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _318182)
   Call: (274) [system] 'A'=end_of_file
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _318182)
^  Call: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _318182)
^  Unify: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _318182)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _357290)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _357290)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _359156)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (276) [user] is_delimiter(t)
^  Unify: (276) [user] is_delimiter(t)
   Call: (277) [system] char_type(t, space)
^  Redo: (276) [user] is_delimiter(t)
   Call: (277) [system] arg(_364796, v('(', ')', end_of_file), t)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _357290)
   Call: (276) [system] ')'==t
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _357290)
   Call: (276) [system] get_char((0x55aefe44e2f0), t)
   Exit: (276) [system] get_char((0x55aefe44e2f0), t)
   Call: (276) [system] t=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _357290)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _372162)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _372162)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _374028)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (277) [user] is_delimiter(o)
^  Unify: (277) [user] is_delimiter(o)
   Call: (278) [system] char_type(o, space)
^  Redo: (277) [user] is_delimiter(o)
   Call: (278) [system] arg(_379668, v('(', ')', end_of_file), o)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _372162)
   Call: (277) [system] ')'==o
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _372162)
   Call: (277) [system] get_char((0x55aefe44e2f0), o)
   Exit: (277) [system] get_char((0x55aefe44e2f0), o)
   Call: (277) [system] o=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _372162)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _387034)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _387034)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _388900)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (278) [user] is_delimiter(m)
^  Unify: (278) [user] is_delimiter(m)
   Call: (279) [system] char_type(m, space)
^  Redo: (278) [user] is_delimiter(m)
   Call: (279) [system] arg(_394540, v('(', ')', end_of_file), m)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _387034)
   Call: (278) [system] ')'==m
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _387034)
   Call: (278) [system] get_char((0x55aefe44e2f0), m)
   Exit: (278) [system] get_char((0x55aefe44e2f0), m)
   Call: (278) [system] m=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _387034)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _401906)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _401906)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _403772)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (279) [user] is_delimiter(' ')
^  Unify: (279) [user] is_delimiter(' ')
   Call: (280) [system] char_type(' ', space)
   Exit: (280) [system] char_type(' ', space)
^  Exit: (279) [user] is_delimiter(' ')
   Call: (279) [system] _401906=[]
   Exit: (279) [system] []=[]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (278) [system] _387034=[m]
   Exit: (278) [system] [m]=[m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (277) [system] _372162=[o, m]
   Exit: (277) [system] [o, m]=[o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (276) [system] _357290=[t, o, m]
   Exit: (276) [system] [t, o, m]=[t, o, m]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (275) [user] classify_and_convert_charseq('A', [t, o, m], _318182)
^  Unify: (275) [user] classify_and_convert_charseq('A', [t, o, m], _318182)
^  Call: (277) [system] setup_call_cleanup('$notrace'(_423320, _423322), once(user:catch(read_from_chars(['A', t, o, m], _318182), _423296, fail)), '$restore_trace'(_423320, _423322))
^  Unify: (277) [system] setup_call_cleanup(system:'$notrace'(_423320, _423322), system:once(user:catch(read_from_chars(['A', t, o, m], _318182), _423296, fail)), system:'$restore_trace'(_423320, _423322))
^  Call: (278) [system] sig_atomic(system:'$notrace'(_423320, _423322))
^  Exit: (277) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _318182), _423296, fail)), system:'$restore_trace'(3, -1))
   Call: (276) [system] atomic(_318182)
^  Redo: (275) [user] classify_and_convert_charseq('A', [t, o, m], _318182)
^  Unify: (275) [user] classify_and_convert_charseq('A', [t, o, m], _318182)
   Call: (276) [system] atom_chars(_318182, ['A', t, o, m])
   Exit: (276) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (275) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (273) [user] read_list(')', (0x55aefe44e2f0), _434574)
^  Unify: (273) [user] read_list(')', (0x55aefe44e2f0), _434574)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _438288)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (275) [system] ' '=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(' ')
^  Unify: (275) [user] is_like_space(' ')
   Call: (276) [system] char_type(' ', 'white')
   Exit: (276) [system] char_type(' ', 'white')
^  Exit: (275) [user] is_like_space(' ')
   Call: (275) [system] get_char((0x55aefe44e2f0), _446946)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _450574)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'R')
   Call: (276) [system] 'R'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('R')
^  Unify: (276) [user] is_like_space('R')
   Call: (277) [system] char_type('R', 'white')
^  Redo: (276) [user] is_like_space('R')
^  Unify: (276) [user] is_like_space('R')
   Call: (277) [system] char_type('R', end_of_line)
^  Redo: (276) [user] is_like_space('R')
^  Unify: (276) [user] is_like_space('R')
   Call: (277) [system] char_type('R', space)
^  Redo: (276) [user] is_like_space('R')
^  Unify: (276) [user] is_like_space('R')
   Call: (277) [system] char_type('R', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _468282)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), 'R')
   Call: (274) [system] 'R'=')'
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _434574)
   Call: (274) [system] 'R'=end_of_file
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _434574)
^  Call: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _473860)
^  Unify: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _473860)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _477574)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'R')
   Call: (276) [system] 'R'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('R')
^  Unify: (276) [user] is_like_space('R')
   Call: (277) [system] char_type('R', 'white')
^  Redo: (276) [user] is_like_space('R')
^  Unify: (276) [user] is_like_space('R')
   Call: (277) [system] char_type('R', end_of_line)
^  Redo: (276) [user] is_like_space('R')
^  Unify: (276) [user] is_like_space('R')
   Call: (277) [system] char_type('R', space)
^  Redo: (276) [user] is_like_space('R')
^  Unify: (276) [user] is_like_space('R')
   Call: (277) [system] char_type('R', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] get_char((0x55aefe44e2f0), _494358)
   Exit: (275) [system] get_char((0x55aefe44e2f0), 'R')
   Call: (275) [system] 'R'='('
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _473860)
   Call: (275) [system] 'R'='['
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _473860)
   Call: (275) [system] 'R'='{'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _473860)
   Call: (275) [system] 'R'='"'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _473860)
   Call: (275) [system] 'R'=!
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _473860)
   Call: (275) [system] 'R'='\''
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _473860)
   Call: (275) [system] 'R'='`'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _473860)
   Call: (275) [system] 'R'=end_of_file
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _473860)
^  Call: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'R', _473860)
^  Unify: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'R', _473860)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _512968)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _512968)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _514834)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (277) [user] is_delimiter(e)
^  Unify: (277) [user] is_delimiter(e)
   Call: (278) [system] char_type(e, space)
^  Redo: (277) [user] is_delimiter(e)
   Call: (278) [system] arg(_520474, v('(', ')', end_of_file), e)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _512968)
   Call: (277) [system] ')'==e
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _512968)
   Call: (277) [system] get_char((0x55aefe44e2f0), e)
   Exit: (277) [system] get_char((0x55aefe44e2f0), e)
   Call: (277) [system] e=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6014)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _9706)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _9706)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _11572)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (278) [user] is_delimiter(t)
^  Unify: (278) [user] is_delimiter(t)
   Call: (279) [system] char_type(t, space)
^  Redo: (278) [user] is_delimiter(t)
   Call: (279) [system] arg(_17212, v('(', ')', end_of_file), t)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _9706)
   Call: (278) [system] ')'==t
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _9706)
   Call: (278) [system] get_char((0x55aefe44e2f0), t)
   Exit: (278) [system] get_char((0x55aefe44e2f0), t)
   Call: (278) [system] t=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _9706)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _24578)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _24578)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _26444)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), u)
^  Call: (279) [user] is_delimiter(u)
^  Unify: (279) [user] is_delimiter(u)
   Call: (280) [system] char_type(u, space)
^  Redo: (279) [user] is_delimiter(u)
   Call: (280) [system] arg(_32084, v('(', ')', end_of_file), u)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _24578)
   Call: (279) [system] ')'==u
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _24578)
   Call: (279) [system] get_char((0x55aefe44e2f0), u)
   Exit: (279) [system] get_char((0x55aefe44e2f0), u)
   Call: (279) [system] u=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _24578)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _39450)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _39450)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _41316)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (280) [user] is_delimiter(r)
^  Unify: (280) [user] is_delimiter(r)
   Call: (281) [system] char_type(r, space)
^  Redo: (280) [user] is_delimiter(r)
   Call: (281) [system] arg(_46956, v('(', ')', end_of_file), r)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _39450)
   Call: (280) [system] ')'==r
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _39450)
   Call: (280) [system] get_char((0x55aefe44e2f0), r)
   Exit: (280) [system] get_char((0x55aefe44e2f0), r)
   Call: (280) [system] r=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _39450)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _54322)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _54322)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _56188)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (281) [user] is_delimiter(n)
^  Unify: (281) [user] is_delimiter(n)
   Call: (282) [system] char_type(n, space)
^  Redo: (281) [user] is_delimiter(n)
   Call: (282) [system] arg(_61828, v('(', ')', end_of_file), n)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _54322)
   Call: (281) [system] ')'==n
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _54322)
   Call: (281) [system] get_char((0x55aefe44e2f0), n)
   Exit: (281) [system] get_char((0x55aefe44e2f0), n)
   Call: (281) [system] n=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _54322)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _69194)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _69194)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _71060)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), 'T')
^  Call: (282) [user] is_delimiter('T')
^  Unify: (282) [user] is_delimiter('T')
   Call: (283) [system] char_type('T', space)
^  Redo: (282) [user] is_delimiter('T')
   Call: (283) [system] arg(_76700, v('(', ')', end_of_file), 'T')
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _69194)
   Call: (282) [system] ')'=='T'
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _69194)
   Call: (282) [system] get_char((0x55aefe44e2f0), 'T')
   Exit: (282) [system] get_char((0x55aefe44e2f0), 'T')
   Call: (282) [system] 'T'=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _69194)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _84066)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _84066)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _85932)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), y)
^  Call: (283) [user] is_delimiter(y)
^  Unify: (283) [user] is_delimiter(y)
   Call: (284) [system] char_type(y, space)
^  Redo: (283) [user] is_delimiter(y)
   Call: (284) [system] arg(_91572, v('(', ')', end_of_file), y)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _84066)
   Call: (283) [system] ')'==y
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _84066)
   Call: (283) [system] get_char((0x55aefe44e2f0), y)
   Exit: (283) [system] get_char((0x55aefe44e2f0), y)
   Call: (283) [system] y=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _84066)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _98938)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _98938)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _100804)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (284) [user] is_delimiter(p)
^  Unify: (284) [user] is_delimiter(p)
   Call: (285) [system] char_type(p, space)
^  Redo: (284) [user] is_delimiter(p)
   Call: (285) [system] arg(_106444, v('(', ')', end_of_file), p)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _98938)
   Call: (284) [system] ')'==p
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _98938)
   Call: (284) [system] get_char((0x55aefe44e2f0), p)
   Exit: (284) [system] get_char((0x55aefe44e2f0), p)
   Call: (284) [system] p=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _98938)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _113810)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _113810)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _115676)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (285) [user] is_delimiter(e)
^  Unify: (285) [user] is_delimiter(e)
   Call: (286) [system] char_type(e, space)
^  Redo: (285) [user] is_delimiter(e)
   Call: (286) [system] arg(_121316, v('(', ')', end_of_file), e)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _113810)
   Call: (285) [system] ')'==e
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _113810)
   Call: (285) [system] get_char((0x55aefe44e2f0), e)
   Exit: (285) [system] get_char((0x55aefe44e2f0), e)
   Call: (285) [system] e=(\)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _113810)
^  Call: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _128682)
^  Unify: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _128682)
   Call: (286) [system] peek_char((0x55aefe44e2f0), _130548)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (286) [user] is_delimiter(')')
^  Unify: (286) [user] is_delimiter(')')
   Call: (287) [system] char_type(')', space)
^  Redo: (286) [user] is_delimiter(')')
   Call: (287) [system] arg(_136188, v('(', ')', end_of_file), ')')
   Exit: (287) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (286) [user] is_delimiter(')')
   Call: (286) [system] _128682=[]
   Exit: (286) [system] []=[]
^  Exit: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (285) [system] _113810=[e]
   Exit: (285) [system] [e]=[e]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e])
   Call: (284) [system] _98938=[p, e]
   Exit: (284) [system] [p, e]=[p, e]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, e])
   Call: (283) [system] _84066=[y, p, e]
   Exit: (283) [system] [y, p, e]=[y, p, e]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [y, p, e])
   Call: (282) [system] _69194=['T', y, p, e]
   Exit: (282) [system] ['T', y, p, e]=['T', y, p, e]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), ['T', y, p, e])
   Call: (281) [system] _54322=[n, 'T', y, p, e]
   Exit: (281) [system] [n, 'T', y, p, e]=[n, 'T', y, p, e]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n, 'T', y, p, e])
   Call: (280) [system] _39450=[r, n, 'T', y, p, e]
   Exit: (280) [system] [r, n, 'T', y, p, e]=[r, n, 'T', y, p, e]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, n, 'T', y, p, e])
   Call: (279) [system] _24578=[u, r, n, 'T', y, p, e]
   Exit: (279) [system] [u, r, n, 'T', y, p, e]=[u, r, n, 'T', y, p, e]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [u, r, n, 'T', y, p, e])
   Call: (278) [system] _9706=[t, u, r, n, 'T', y, p, e]
   Exit: (278) [system] [t, u, r, n, 'T', y, p, e]=[t, u, r, n, 'T', y, p, e]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, u, r, n, 'T', y, p, e])
   Call: (277) [system] _6014=[e, t, u, r, n, 'T', y, p, e]
   Exit: (277) [system] [e, t, u, r, n, 'T', y, p, e]=[e, t, u, r, n, 'T', y, p, e]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, t, u, r, n, 'T', y, p, e])
^  Call: (276) [user] classify_and_convert_charseq('R', [e, t, u, r, n, 'T', y, p, e], _6010)
^  Unify: (276) [user] classify_and_convert_charseq('R', [e, t, u, r, n, 'T', y, p, e], _6010)
^  Call: (278) [system] setup_call_cleanup('$notrace'(_168728, _168730), once(user:catch(read_from_chars(['R', e, t, u, r, n, 'T', y, p, e], _6010), _168704, fail)), '$restore_trace'(_168728, _168730))
^  Unify: (278) [system] setup_call_cleanup(system:'$notrace'(_168728, _168730), system:once(user:catch(read_from_chars(['R', e, t, u, r, n, 'T', y, p, e], _6010), _168704, fail)), system:'$restore_trace'(_168728, _168730))
^  Call: (279) [system] sig_atomic(system:'$notrace'(_168728, _168730))
^  Exit: (278) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['R', e, t, u, r, n, 'T', y, p, e], _6010), _168704, fail)), system:'$restore_trace'(3, -1))
   Call: (277) [system] atomic(_6010)
^  Redo: (276) [user] classify_and_convert_charseq('R', [e, t, u, r, n, 'T', y, p, e], _6010)
^  Unify: (276) [user] classify_and_convert_charseq('R', [e, t, u, r, n, 'T', y, p, e], _6010)
   Call: (277) [system] atom_chars(_6010, ['R', e, t, u, r, n, 'T', y, p, e])
   Exit: (277) [system] atom_chars('ReturnType', ['R', e, t, u, r, n, 'T', y, p, e])
^  Exit: (276) [user] classify_and_convert_charseq('R', [e, t, u, r, n, 'T', y, p, e], 'ReturnType')
^  Exit: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'R', 'ReturnType')
^  Exit: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), 'ReturnType')
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _179982)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _179982)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _183696)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (276) [system] ')'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', 'white')
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', end_of_line)
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', space)
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _200480)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (275) [system] ')'=')'
   Exit: (275) [system] ')'=')'
   Call: (275) [system] get_char((0x55aefe44e2f0), _204270)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ')')
   Call: (275) [system] _179982=[]
   Exit: (275) [system] []=[]
^  Exit: (274) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (274) [system] _6006=['ReturnType']
   Exit: (274) [system] ['ReturnType']=['ReturnType']
^  Exit: (273) [user] read_list(')', (0x55aefe44e2f0), ['ReturnType'])
   Call: (273) [system] _6000=['Atom', 'ReturnType']
   Exit: (273) [system] ['Atom', 'ReturnType']=['Atom', 'ReturnType']
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'ReturnType'])
   Call: (272) [system] _5992=[->, 'Atom', 'ReturnType']
   Exit: (272) [system] [->, 'Atom', 'ReturnType']=[->, 'Atom', 'ReturnType']
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [->, 'Atom', 'ReturnType'])
^  Exit: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), [->, 'Atom', 'ReturnType'])
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _218152)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _218152)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _221866)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (272) [system] ')'=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', 'white')
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', end_of_line)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', space)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _238650)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (271) [system] ')'=')'
   Exit: (271) [system] ')'=')'
   Call: (271) [system] get_char((0x55aefe44e2f0), _242440)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ')')
   Call: (271) [system] _218152=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (270) [system] _5988=[[->, 'Atom', 'ReturnType']]
   Exit: (270) [system] [[->, 'Atom', 'ReturnType']]=[[->, 'Atom', 'ReturnType']]
^  Exit: (269) [user] read_list(')', (0x55aefe44e2f0), [[->, 'Atom', 'ReturnType']])
   Call: (269) [system] _5982=[return, [->, 'Atom', 'ReturnType']]
   Exit: (269) [system] [return, [->, 'Atom', 'ReturnType']]=[return, [->, 'Atom', 'ReturnType']]
^  Exit: (268) [user] read_list(')', (0x55aefe44e2f0), [return, [->, 'Atom', 'ReturnType']])
   Call: (268) [system] _5942=[:, return, [->, 'Atom', 'ReturnType']]
   Exit: (268) [system] [:, return, [->, 'Atom', 'ReturnType']]=[:, return, [->, 'Atom', 'ReturnType']]
^  Exit: (267) [user] read_list(')', (0x55aefe44e2f0), [:, return, [->, 'Atom', 'ReturnType']])
^  Exit: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), [:, return, [->, 'Atom', 'ReturnType']])
^  Exit: (265) [user] read_sexpr((0x55aefe44e2f0), [:, return, [->, 'Atom', 'ReturnType']])
^  Call: (265) [user] assertz(metta_file_comment(4, 0, 74, [:, return, [->, 'Atom', 'ReturnType']], '$stream_position'(74, 4, 0, 74)))
^  Exit: (265) [user] assertz(metta_file_comment(4, 0, 74, [:, return, [->, 'Atom', 'ReturnType']], '$stream_position'(74, 4, 0, 74)))
^  Exit: (263) [system] once(user:(read_position((0x55aefe44e2f0), 4, 0, 74, '$stream_position'(74, 4, 0, 74)), read_sexpr((0x55aefe44e2f0), [:, return, [->, 'Atom', 'ReturnType']]), assertz(metta_file_comment(4, 0, 74, [:, return, [->, 'Atom', 'ReturnType']], '$stream_position'(74, 4, 0, 74)))))
   Call: (263) [system] fail
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Call: (263) [user] retract(metta_file_comment(_262814, _262816, _262818, _262820, _262822))
^  Exit: (263) [user] retract(metta_file_comment(4, 0, 74, [:, return, [->, 'Atom', 'ReturnType']], '$stream_position'(74, 4, 0, 74)))
^  Call: (263) [user] trly(untyped_to_metta, [:, return, [->, 'Atom', 'ReturnType']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, return, [->, 'Atom', 'ReturnType']], _5908)
^  Call: (264) [user] once(call(untyped_to_metta, [:, return, [->, 'Atom', 'ReturnType']], _266600))
^  Unify: (264) [system] once(user:call(untyped_to_metta, [:, return, [->, 'Atom', 'ReturnType']], _266600))
^  Call: (265) [user] call(untyped_to_metta, [:, return, [->, 'Atom', 'ReturnType']], _266600)
^  Unify: (265) [system] call(user:untyped_to_metta, [:, return, [->, 'Atom', 'ReturnType']], _266600)
^  Call: (266) [user] untyped_to_metta([:, return, [->, 'Atom', 'ReturnType']], _266600)
^  Unify: (266) [user] untyped_to_metta([:, return, [->, 'Atom', 'ReturnType']], _266600)
^  Call: (267) [user] must_det_ll(trly(mfix_vars1, [:, return, [->, 'Atom', 'ReturnType']], _272212))
^  Unify: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, return, [->, 'Atom', 'ReturnType']], _272212))
^  Call: (268) [user] once(user:trly(mfix_vars1, [:, return, [->, 'Atom', 'ReturnType']], _272212))
^  Unify: (268) [system] once(user:trly(mfix_vars1, [:, return, [->, 'Atom', 'ReturnType']], _272212))
^  Call: (269) [user] trly(mfix_vars1, [:, return, [->, 'Atom', 'ReturnType']], _272212)
^  Unify: (269) [user] trly(mfix_vars1, [:, return, [->, 'Atom', 'ReturnType']], _272212)
^  Call: (270) [user] once(call(mfix_vars1, [:, return, [->, 'Atom', 'ReturnType']], _277798))
^  Unify: (270) [system] once(user:call(mfix_vars1, [:, return, [->, 'Atom', 'ReturnType']], _277798))
^  Call: (271) [user] call(mfix_vars1, [:, return, [->, 'Atom', 'ReturnType']], _277798)
^  Unify: (271) [system] call(user:mfix_vars1, [:, return, [->, 'Atom', 'ReturnType']], _277798)
^  Call: (272) [user] mfix_vars1([:, return, [->, 'Atom', 'ReturnType']], _277798)
^  Unify: (272) [user] mfix_vars1([:, return, [->, 'Atom', 'ReturnType']], _277798)
   Call: (273) [system] var([:, return, [->, 'Atom', 'ReturnType']])
^  Redo: (272) [user] mfix_vars1([:, return, [->, 'Atom', 'ReturnType']], _277798)
^  Unify: (272) [user] mfix_vars1([:, return, [->, 'Atom', 'ReturnType']], '$VAR'(_285258))
   Call: (273) [system] atom([:, return, [->, 'Atom', 'ReturnType']])
^  Redo: (272) [user] mfix_vars1([:, return, [->, 'Atom', 'ReturnType']], _277798)
^  Unify: (272) [user] mfix_vars1([:, return, [->, 'Atom', 'ReturnType']], _277798)
   Call: (273) [system] [:, return, [->, 'Atom', 'ReturnType']]==true
^  Redo: (272) [user] mfix_vars1([:, return, [->, 'Atom', 'ReturnType']], _277798)
^  Unify: (272) [user] mfix_vars1([:, return, [->, 'Atom', 'ReturnType']], _277798)
   Call: (273) [system] [:, return, [->, 'Atom', 'ReturnType']]==false
^  Redo: (272) [user] mfix_vars1([:, return, [->, 'Atom', 'ReturnType']], _277798)
^  Unify: (272) [user] mfix_vars1([:, return, [->, 'Atom', 'ReturnType']], _277798)
   Call: (273) [system] (:)=='['
^  Redo: (272) [user] mfix_vars1([:, return, [->, 'Atom', 'ReturnType']], _277798)
^  Unify: (272) [user] mfix_vars1([:, return, [->, 'Atom', 'ReturnType']], _277798)
   Call: (273) [system] (:)=='{'
^  Redo: (272) [user] mfix_vars1([:, return, [->, 'Atom', 'ReturnType']], _277798)
^  Unify: (272) [user] mfix_vars1([:, return, [->, 'Atom', 'ReturnType']], _277798)
   Call: (273) [system] is_list([return, [->, 'Atom', 'ReturnType']])
   Exit: (273) [system] is_list([return, [->, 'Atom', 'ReturnType']])
   Call: (273) [lists] lists:last([return, [->, 'Atom', 'ReturnType']], _301952)
   Unify: (273) [lists] lists:last([return, [->, 'Atom', 'ReturnType']], _301952)
   Call: (274) [lists] lists:last_([[->, 'Atom', 'ReturnType']], return, _301952)
   Unify: (274) [lists] lists:last_([[->, 'Atom', 'ReturnType']], return, _301952)
   Call: (275) [lists] lists:last_([], [->, 'Atom', 'ReturnType'], _301952)
   Unify: (275) [lists] lists:last_([], [->, 'Atom', 'ReturnType'], [->, 'Atom', 'ReturnType'])
   Exit: (275) [lists] lists:last_([], [->, 'Atom', 'ReturnType'], [->, 'Atom', 'ReturnType'])
   Exit: (274) [lists] lists:last_([[->, 'Atom', 'ReturnType']], return, [->, 'Atom', 'ReturnType'])
   Exit: (273) [lists] lists:last([return, [->, 'Atom', 'ReturnType']], [->, 'Atom', 'ReturnType'])
   Call: (273) [system] [->, 'Atom', 'ReturnType']=='}'
^  Redo: (272) [user] mfix_vars1([:, return, [->, 'Atom', 'ReturnType']], _277798)
^  Unify: (272) [user] mfix_vars1([:, return, [->, 'Atom', 'ReturnType']], _277798)
   Call: (273) [system] [:, return, [->, 'Atom', 'ReturnType']]==[_313116, _313122]
^  Redo: (272) [user] mfix_vars1([:, return, [->, 'Atom', 'ReturnType']], _277798)
^  Unify: (272) [user] mfix_vars1([:, return, [->, 'Atom', 'ReturnType']], _277798)
   Call: (273) [system] fail
^  Redo: (272) [user] mfix_vars1([:, return, [->, 'Atom', 'ReturnType']], _277798)
^  Unify: (272) [user] mfix_vars1([:, return, [->, 'Atom', 'ReturnType']], _277798)
   Call: (273) [system] is_list([:, return, [->, 'Atom', 'ReturnType']])
   Exit: (273) [system] is_list([:, return, [->, 'Atom', 'ReturnType']])
^  Call: (273) [user] apply:maplist(mfix_vars1, [:, return, [->, 'Atom', 'ReturnType']], _277798)
^  Unify: (273) [apply] apply:maplist(user:mfix_vars1, [:, return, [->, 'Atom', 'ReturnType']], _277798)
   Call: (274) [apply] apply:maplist_([:, return, [->, 'Atom', 'ReturnType']], _277798, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([:, return, [->, 'Atom', 'ReturnType']], [_323346|_323348], user:mfix_vars1)
^  Call: (275) [user] mfix_vars1(:, _323346)
^  Unify: (275) [user] mfix_vars1(:, _323346)
   Call: (276) [system] var(:)
^  Redo: (275) [user] mfix_vars1(:, _323346)
^  Unify: (275) [user] mfix_vars1(:, '$VAR'(_327992))
   Call: (276) [system] atom(:)
   Exit: (276) [system] atom(:)
^  Call: (276) [user] symbol_concat($, _330770, :)
^  Unify: (276) [user] symbol_concat($, _330770, :)
   Call: (277) [system] atom_concat($, _330770, :)
   Fail: (277) [system] atom_concat($, _330770, :)
^  Fail: (276) [user] symbol_concat($, _330770, :)
^  Redo: (275) [user] mfix_vars1(:, _323346)
^  Unify: (275) [user] mfix_vars1(:, _323346)
   Call: (276) [system] (:)==true
^  Redo: (275) [user] mfix_vars1(:, _323346)
^  Unify: (275) [user] mfix_vars1(:, _323346)
   Call: (276) [system] (:)==false
^  Redo: (275) [user] mfix_vars1(:, _323346)
^  Unify: (275) [user] mfix_vars1(:, _323346)
   Call: (276) [system] (:)==[_342858, _342864]
^  Redo: (275) [user] mfix_vars1(:, _323346)
^  Unify: (275) [user] mfix_vars1(:, _323346)
   Call: (276) [system] is_list(:)
^  Redo: (275) [user] mfix_vars1(:, _323346)
^  Unify: (275) [user] mfix_vars1(:, _323346)
   Call: (276) [system] string(:)
^  Redo: (275) [user] mfix_vars1(:, _323346)
^  Unify: (275) [user] mfix_vars1(:, _323346)
   Call: (276) [system] compound(:)
^  Redo: (275) [user] mfix_vars1(:, _323346)
^  Unify: (275) [user] mfix_vars1(:, _323346)
^  Call: (276) [user] symbol(:)
^  Unify: (276) [user] symbol(:)
   Call: (277) [system] atom(:)
   Exit: (277) [system] atom(:)
^  Exit: (276) [user] symbol(:)
^  Unify: (275) [user] mfix_vars1(:, :)
^  Exit: (275) [user] mfix_vars1(:, :)
   Call: (275) [apply] apply:maplist_([return, [->, 'Atom', 'ReturnType']], _323348, user:mfix_vars1)
   Unify: (275) [apply] apply:maplist_([return, [->, 'Atom', 'ReturnType']], [_361402|_361404], user:mfix_vars1)
^  Call: (276) [user] mfix_vars1(return, _361402)
^  Unify: (276) [user] mfix_vars1(return, _361402)
   Call: (277) [system] var(return)
^  Redo: (276) [user] mfix_vars1(return, _361402)
^  Unify: (276) [user] mfix_vars1(return, '$VAR'(_366048))
   Call: (277) [system] atom(return)
   Exit: (277) [system] atom(return)
^  Call: (277) [user] symbol_concat($, _368826, return)
^  Unify: (277) [user] symbol_concat($, _368826, return)
   Call: (278) [system] atom_concat($, _368826, return)
   Fail: (278) [system] atom_concat($, _368826, return)
^  Fail: (277) [user] symbol_concat($, _368826, return)
^  Redo: (276) [user] mfix_vars1(return, _361402)
^  Unify: (276) [user] mfix_vars1(return, _361402)
   Call: (277) [system] return==true
^  Redo: (276) [user] mfix_vars1(return, _361402)
^  Unify: (276) [user] mfix_vars1(return, _361402)
   Call: (277) [system] return==false
^  Redo: (276) [user] mfix_vars1(return, _361402)
^  Unify: (276) [user] mfix_vars1(return, _361402)
   Call: (277) [system] return==[_380914, _380920]
^  Redo: (276) [user] mfix_vars1(return, _361402)
^  Unify: (276) [user] mfix_vars1(return, _361402)
   Call: (277) [system] is_list(return)
^  Redo: (276) [user] mfix_vars1(return, _361402)
^  Unify: (276) [user] mfix_vars1(return, _361402)
   Call: (277) [system] string(return)
^  Redo: (276) [user] mfix_vars1(return, _361402)
^  Unify: (276) [user] mfix_vars1(return, _361402)
   Call: (277) [system] compound(return)
^  Redo: (276) [user] mfix_vars1(return, _361402)
^  Unify: (276) [user] mfix_vars1(return, _361402)
^  Call: (277) [user] symbol(return)
^  Unify: (277) [user] symbol(return)
   Call: (278) [system] atom(return)
   Exit: (278) [system] atom(return)
^  Exit: (277) [user] symbol(return)
^  Unify: (276) [user] mfix_vars1(return, return)
^  Exit: (276) [user] mfix_vars1(return, return)
   Call: (276) [apply] apply:maplist_([[->, 'Atom', 'ReturnType']], _361404, user:mfix_vars1)
   Unify: (276) [apply] apply:maplist_([[->, 'Atom', 'ReturnType']], [_399458|_399460], user:mfix_vars1)
^  Call: (277) [user] mfix_vars1([->, 'Atom', 'ReturnType'], _399458)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'ReturnType'], _399458)
   Call: (278) [system] var([->, 'Atom', 'ReturnType'])
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'ReturnType'], _399458)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'ReturnType'], '$VAR'(_404104))
   Call: (278) [system] atom([->, 'Atom', 'ReturnType'])
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'ReturnType'], _399458)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'ReturnType'], _399458)
   Call: (278) [system] [->, 'Atom', 'ReturnType']==true
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'ReturnType'], _399458)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'ReturnType'], _399458)
   Call: (278) [system] [->, 'Atom', 'ReturnType']==false
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'ReturnType'], _399458)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'ReturnType'], _399458)
   Call: (278) [system] (->)=='['
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'ReturnType'], _399458)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'ReturnType'], _399458)
   Call: (278) [system] (->)=='{'
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'ReturnType'], _399458)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'ReturnType'], _399458)
   Call: (278) [system] is_list(['Atom', 'ReturnType'])
   Exit: (278) [system] is_list(['Atom', 'ReturnType'])
   Call: (278) [lists] lists:last(['Atom', 'ReturnType'], _420798)
   Unify: (278) [lists] lists:last(['Atom', 'ReturnType'], _420798)
   Call: (279) [lists] lists:last_(['ReturnType'], 'Atom', _420798)
   Unify: (279) [lists] lists:last_(['ReturnType'], 'Atom', _420798)
   Call: (280) [lists] lists:last_([], 'ReturnType', _420798)
   Unify: (280) [lists] lists:last_([], 'ReturnType', 'ReturnType')
   Exit: (280) [lists] lists:last_([], 'ReturnType', 'ReturnType')
   Exit: (279) [lists] lists:last_(['ReturnType'], 'Atom', 'ReturnType')
   Exit: (278) [lists] lists:last(['Atom', 'ReturnType'], 'ReturnType')
   Call: (278) [system] 'ReturnType'=='}'
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'ReturnType'], _399458)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'ReturnType'], _399458)
   Call: (278) [system] [->, 'Atom', 'ReturnType']==[_431962, _431968]
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'ReturnType'], _399458)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'ReturnType'], _399458)
   Call: (278) [system] fail
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'ReturnType'], _399458)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'ReturnType'], _399458)
   Call: (278) [system] is_list([->, 'Atom', 'ReturnType'])
   Exit: (278) [system] is_list([->, 'Atom', 'ReturnType'])
^  Call: (278) [user] apply:maplist(mfix_vars1, [->, 'Atom', 'ReturnType'], _399458)
^  Unify: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'ReturnType'], _399458)
   Call: (279) [apply] apply:maplist_([->, 'Atom', 'ReturnType'], _399458, user:mfix_vars1)
   Unify: (279) [apply] apply:maplist_([->, 'Atom', 'ReturnType'], [_442192|_442194], user:mfix_vars1)
^  Call: (280) [user] mfix_vars1(->, _442192)
^  Unify: (280) [user] mfix_vars1(->, _442192)
   Call: (281) [system] var(->)
^  Redo: (280) [user] mfix_vars1(->, _442192)
^  Unify: (280) [user] mfix_vars1(->, '$VAR'(_446838))
   Call: (281) [system] atom(->)
   Exit: (281) [system] atom(->)
^  Call: (281) [user] symbol_concat($, _449616, ->)
^  Unify: (281) [user] symbol_concat($, _449616, ->)
   Call: (282) [system] atom_concat($, _449616, ->)
   Fail: (282) [system] atom_concat($, _449616, ->)
^  Fail: (281) [user] symbol_concat($, _449616, ->)
^  Redo: (280) [user] mfix_vars1(->, _442192)
^  Unify: (280) [user] mfix_vars1(->, _442192)
   Call: (281) [system] (->)==true
^  Redo: (280) [user] mfix_vars1(->, _442192)
^  Unify: (280) [user] mfix_vars1(->, _442192)
   Call: (281) [system] (->)==false
^  Redo: (280) [user] mfix_vars1(->, _442192)
^  Unify: (280) [user] mfix_vars1(->, _442192)
   Call: (281) [system] (->)==[_461704, _461710]
^  Redo: (280) [user] mfix_vars1(->, _442192)
^  Unify: (280) [user] mfix_vars1(->, _442192)
   Call: (281) [system] is_list(->)
^  Redo: (280) [user] mfix_vars1(->, _442192)
^  Unify: (280) [user] mfix_vars1(->, _442192)
   Call: (281) [system] string(->)
^  Redo: (280) [user] mfix_vars1(->, _442192)
^  Unify: (280) [user] mfix_vars1(->, _442192)
   Call: (281) [system] compound(->)
^  Redo: (280) [user] mfix_vars1(->, _442192)
^  Unify: (280) [user] mfix_vars1(->, _442192)
^  Call: (281) [user] symbol(->)
^  Unify: (281) [user] symbol(->)
   Call: (282) [system] atom(->)
   Exit: (282) [system] atom(->)
^  Exit: (281) [user] symbol(->)
^  Unify: (280) [user] mfix_vars1(->, ->)
^  Exit: (280) [user] mfix_vars1(->, ->)
   Call: (280) [apply] apply:maplist_(['Atom', 'ReturnType'], _442194, user:mfix_vars1)
   Unify: (280) [apply] apply:maplist_(['Atom', 'ReturnType'], [_480248|_480250], user:mfix_vars1)
^  Call: (281) [user] mfix_vars1('Atom', _480248)
^  Unify: (281) [user] mfix_vars1('Atom', _480248)
   Call: (282) [system] var('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _480248)
^  Unify: (281) [user] mfix_vars1('Atom', '$VAR'(_484894))
   Call: (282) [system] atom('Atom')
   Exit: (282) [system] atom('Atom')
^  Call: (282) [user] symbol_concat($, _487672, 'Atom')
^  Unify: (282) [user] symbol_concat($, _487672, 'Atom')
   Call: (283) [system] atom_concat($, _487672, 'Atom')
   Fail: (283) [system] atom_concat($, _487672, 'Atom')
^  Fail: (282) [user] symbol_concat($, _487672, 'Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _480248)
^  Unify: (281) [user] mfix_vars1('Atom', _480248)
   Call: (282) [system] 'Atom'==true
^  Redo: (281) [user] mfix_vars1('Atom', _480248)
^  Unify: (281) [user] mfix_vars1('Atom', _480248)
   Call: (282) [system] 'Atom'==false
^  Redo: (281) [user] mfix_vars1('Atom', _480248)
^  Unify: (281) [user] mfix_vars1('Atom', _480248)
   Call: (282) [system] 'Atom'==[_499760, _499766]
^  Redo: (281) [user] mfix_vars1('Atom', _480248)
^  Unify: (281) [user] mfix_vars1('Atom', _480248)
   Call: (282) [system] is_list('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _480248)
^  Unify: (281) [user] mfix_vars1('Atom', _480248)
   Call: (282) [system] string('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _480248)
^  Unify: (281) [user] mfix_vars1('Atom', _480248)
   Call: (282) [system] compound('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _480248)
^  Unify: (281) [user] mfix_vars1('Atom', _480248)
^  Call: (282) [user] symbol('Atom')
^  Unify: (282) [user] symbol('Atom')
   Call: (283) [system] atom('Atom')
   Exit: (283) [system] atom('Atom')
^  Exit: (282) [user] symbol('Atom')
^  Unify: (281) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (281) [user] mfix_vars1('Atom', 'Atom')
   Call: (281) [apply] apply:maplist_(['ReturnType'], _480250, user:mfix_vars1)
   Unify: (281) [apply] apply:maplist_(['ReturnType'], [_518304|_518306], user:mfix_vars1)
^  Call: (282) [user] mfix_vars1('ReturnType', _518304)
^  Unify: (282) [user] mfix_vars1('ReturnType', _518304)
   Call: (283) [system] var('ReturnType')
^  Redo: (282) [user] mfix_vars1('ReturnType', _518304)
^  Unify: (282) [user] mfix_vars1('ReturnType', '$VAR'(_522950))
   Call: (283) [system] atom('ReturnType')
   Exit: (283) [system] atom('ReturnType')
^  Call: (283) [user] symbol_concat($, _7776, 'ReturnType')
^  Unify: (283) [user] symbol_concat($, _7776, 'ReturnType')
   Call: (284) [system] atom_concat($, _7776, 'ReturnType')
   Fail: (284) [system] atom_concat($, _7776, 'ReturnType')
^  Fail: (283) [user] symbol_concat($, _7776, 'ReturnType')
^  Redo: (282) [user] mfix_vars1('ReturnType', _6048)
^  Unify: (282) [user] mfix_vars1('ReturnType', _6048)
   Call: (283) [system] 'ReturnType'==true
^  Redo: (282) [user] mfix_vars1('ReturnType', _6048)
^  Unify: (282) [user] mfix_vars1('ReturnType', _6048)
   Call: (283) [system] 'ReturnType'==false
^  Redo: (282) [user] mfix_vars1('ReturnType', _6048)
^  Unify: (282) [user] mfix_vars1('ReturnType', _6048)
   Call: (283) [system] 'ReturnType'==[_19864, _19870]
^  Redo: (282) [user] mfix_vars1('ReturnType', _6048)
^  Unify: (282) [user] mfix_vars1('ReturnType', _6048)
   Call: (283) [system] is_list('ReturnType')
^  Redo: (282) [user] mfix_vars1('ReturnType', _6048)
^  Unify: (282) [user] mfix_vars1('ReturnType', _6048)
   Call: (283) [system] string('ReturnType')
^  Redo: (282) [user] mfix_vars1('ReturnType', _6048)
^  Unify: (282) [user] mfix_vars1('ReturnType', _6048)
   Call: (283) [system] compound('ReturnType')
^  Redo: (282) [user] mfix_vars1('ReturnType', _6048)
^  Unify: (282) [user] mfix_vars1('ReturnType', _6048)
^  Call: (283) [user] symbol('ReturnType')
^  Unify: (283) [user] symbol('ReturnType')
   Call: (284) [system] atom('ReturnType')
   Exit: (284) [system] atom('ReturnType')
^  Exit: (283) [user] symbol('ReturnType')
^  Unify: (282) [user] mfix_vars1('ReturnType', 'ReturnType')
^  Exit: (282) [user] mfix_vars1('ReturnType', 'ReturnType')
   Call: (282) [apply] apply:maplist_([], _6050, user:mfix_vars1)
   Unify: (282) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (282) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (281) [apply] apply:maplist_(['ReturnType'], ['ReturnType'], user:mfix_vars1)
   Exit: (280) [apply] apply:maplist_(['Atom', 'ReturnType'], ['Atom', 'ReturnType'], user:mfix_vars1)
   Exit: (279) [apply] apply:maplist_([->, 'Atom', 'ReturnType'], [->, 'Atom', 'ReturnType'], user:mfix_vars1)
^  Exit: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'ReturnType'], [->, 'Atom', 'ReturnType'])
^  Exit: (277) [user] mfix_vars1([->, 'Atom', 'ReturnType'], [->, 'Atom', 'ReturnType'])
   Call: (277) [apply] apply:maplist_([], _6026, user:mfix_vars1)
   Unify: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (276) [apply] apply:maplist_([[->, 'Atom', 'ReturnType']], [[->, 'Atom', 'ReturnType']], user:mfix_vars1)
   Exit: (275) [apply] apply:maplist_([return, [->, 'Atom', 'ReturnType']], [return, [->, 'Atom', 'ReturnType']], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']], user:mfix_vars1)
^  Exit: (273) [apply] apply:maplist(user:mfix_vars1, [:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']])
^  Exit: (272) [user] mfix_vars1([:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']])
^  Exit: (271) [system] call(user:mfix_vars1, [:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']])
^  Exit: (270) [system] once(user:call(mfix_vars1, [:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']]))
   Call: (270) [system] [:, return, [->, 'Atom', 'ReturnType']]\=@=[:, return, [->, 'Atom', 'ReturnType']]
^  Redo: (269) [user] trly(mfix_vars1, [:, return, [->, 'Atom', 'ReturnType']], _5976)
^  Unify: (269) [user] trly(mfix_vars1, [:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']])
^  Exit: (269) [user] trly(mfix_vars1, [:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']])
^  Exit: (268) [system] once(user:trly(mfix_vars1, [:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']]))
^  Exit: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_c, [:, return, [->, 'Atom', 'ReturnType']], _59842))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_c, [:, return, [->, 'Atom', 'ReturnType']], _59842))
^  Call: (268) [user] once(user:trly(cons_to_c, [:, return, [->, 'Atom', 'ReturnType']], _59842))
^  Unify: (268) [system] once(user:trly(cons_to_c, [:, return, [->, 'Atom', 'ReturnType']], _59842))
^  Call: (269) [user] trly(cons_to_c, [:, return, [->, 'Atom', 'ReturnType']], _59842)
^  Unify: (269) [user] trly(cons_to_c, [:, return, [->, 'Atom', 'ReturnType']], _59842)
^  Call: (270) [user] once(call(cons_to_c, [:, return, [->, 'Atom', 'ReturnType']], _65428))
^  Unify: (270) [system] once(user:call(cons_to_c, [:, return, [->, 'Atom', 'ReturnType']], _65428))
^  Call: (271) [user] call(cons_to_c, [:, return, [->, 'Atom', 'ReturnType']], _65428)
^  Unify: (271) [system] call(user:cons_to_c, [:, return, [->, 'Atom', 'ReturnType']], _65428)
^  Call: (272) [user] cons_to_c([:, return, [->, 'Atom', 'ReturnType']], _65428)
^  Unify: (272) [user] cons_to_c([:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_c([:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']])
^  Exit: (271) [system] call(user:cons_to_c, [:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']])
^  Exit: (270) [system] once(user:call(cons_to_c, [:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']]))
   Call: (270) [system] [:, return, [->, 'Atom', 'ReturnType']]\=@=[:, return, [->, 'Atom', 'ReturnType']]
^  Redo: (269) [user] trly(cons_to_c, [:, return, [->, 'Atom', 'ReturnType']], _59842)
^  Unify: (269) [user] trly(cons_to_c, [:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']])
^  Exit: (269) [user] trly(cons_to_c, [:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']])
^  Exit: (268) [system] once(user:trly(cons_to_c, [:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_c, [:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_l, [:, return, [->, 'Atom', 'ReturnType']], _5956))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_l, [:, return, [->, 'Atom', 'ReturnType']], _5956))
^  Call: (268) [user] once(user:trly(cons_to_l, [:, return, [->, 'Atom', 'ReturnType']], _5956))
^  Unify: (268) [system] once(user:trly(cons_to_l, [:, return, [->, 'Atom', 'ReturnType']], _5956))
^  Call: (269) [user] trly(cons_to_l, [:, return, [->, 'Atom', 'ReturnType']], _5956)
^  Unify: (269) [user] trly(cons_to_l, [:, return, [->, 'Atom', 'ReturnType']], _5956)
^  Call: (270) [user] once(call(cons_to_l, [:, return, [->, 'Atom', 'ReturnType']], _87748))
^  Unify: (270) [system] once(user:call(cons_to_l, [:, return, [->, 'Atom', 'ReturnType']], _87748))
^  Call: (271) [user] call(cons_to_l, [:, return, [->, 'Atom', 'ReturnType']], _87748)
^  Unify: (271) [system] call(user:cons_to_l, [:, return, [->, 'Atom', 'ReturnType']], _87748)
^  Call: (272) [user] cons_to_l([:, return, [->, 'Atom', 'ReturnType']], _87748)
^  Unify: (272) [user] cons_to_l([:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_l([:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']])
^  Exit: (271) [system] call(user:cons_to_l, [:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']])
^  Exit: (270) [system] once(user:call(cons_to_l, [:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']]))
   Call: (270) [system] [:, return, [->, 'Atom', 'ReturnType']]\=@=[:, return, [->, 'Atom', 'ReturnType']]
^  Redo: (269) [user] trly(cons_to_l, [:, return, [->, 'Atom', 'ReturnType']], _5956)
^  Unify: (269) [user] trly(cons_to_l, [:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']])
^  Exit: (269) [user] trly(cons_to_l, [:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']])
^  Exit: (268) [system] once(user:trly(cons_to_l, [:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_l, [:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']]))
^  Exit: (266) [user] untyped_to_metta([:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']])
^  Exit: (265) [system] call(user:untyped_to_metta, [:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']])
^  Exit: (264) [system] once(user:call(untyped_to_metta, [:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']]))
   Call: (264) [system] [:, return, [->, 'Atom', 'ReturnType']]\=@=[:, return, [->, 'Atom', 'ReturnType']]
^  Redo: (263) [user] trly(untyped_to_metta, [:, return, [->, 'Atom', 'ReturnType']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']])
^  Exit: (263) [user] trly(untyped_to_metta, [:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']])
^  Exit: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, return, [->, 'Atom', 'ReturnType']])
   Call: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, return, [->, 'Atom', 'ReturnType']])))
   Unify: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, return, [->, 'Atom', 'ReturnType']])))
   Exit: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, return, [->, 'Atom', 'ReturnType']])))
^  Exit: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, return, [->, 'Atom', 'ReturnType']])
^  Exit: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, return, [->, 'Atom', 'ReturnType']])
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, return, [->, 'Atom', 'ReturnType']])
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, return, [->, 'Atom', 'ReturnType']])))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, return, [->, 'Atom', 'ReturnType']])))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, return, [->, 'Atom', 'ReturnType']])))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, return, [->, 'Atom', 'ReturnType']])
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), [:, return, [->, 'Atom', 'ReturnType']])
^  Call: (257) [user] subst_vars([:, return, [->, 'Atom', 'ReturnType']], _122056, [], _122058)
^  Unify: (257) [user] subst_vars([:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']], [], [])
   Call: (258) [system] var([:, return, [->, 'Atom', 'ReturnType']])
^  Redo: (257) [user] subst_vars([:, return, [->, 'Atom', 'ReturnType']], _122056, [], _122058)
^  Unify: (257) [user] subst_vars([:, return, [->, 'Atom', 'ReturnType']], [_125794|_125796], [], _122058)
^  Call: (258) [user] subst_vars(:, _125794, [], _126734)
^  Unify: (258) [user] subst_vars(:, :, [], [])
   Call: (259) [system] var(:)
^  Redo: (258) [user] subst_vars(:, _125794, [], _126734)
^  Unify: (258) [user] subst_vars(:, _125794, [], _126734)
   Call: (259) [system] atom(:)
   Exit: (259) [system] atom(:)
^  Call: (259) [user] symbol_concat($, _133252, :)
^  Unify: (259) [user] symbol_concat($, _133252, :)
   Call: (260) [system] atom_concat($, _133252, :)
   Fail: (260) [system] atom_concat($, _133252, :)
^  Fail: (259) [user] symbol_concat($, _133252, :)
^  Redo: (258) [user] subst_vars(:, _125794, [], _126734)
^  Unify: (258) [user] subst_vars(:, _125794, [], _126734)
   Call: (259) [system] compound(:)
^  Redo: (258) [user] subst_vars(:, _125794, [], _126734)
^  Unify: (258) [user] subst_vars(:, :, [], [])
^  Exit: (258) [user] subst_vars(:, :, [], [])
^  Call: (258) [user] subst_vars([return, [->, 'Atom', 'ReturnType']], _125796, [], _122058)
^  Unify: (258) [user] subst_vars([return, [->, 'Atom', 'ReturnType']], [return, [->, 'Atom', 'ReturnType']], [], [])
   Call: (259) [system] var([return, [->, 'Atom', 'ReturnType']])
^  Redo: (258) [user] subst_vars([return, [->, 'Atom', 'ReturnType']], _125796, [], _122058)
^  Unify: (258) [user] subst_vars([return, [->, 'Atom', 'ReturnType']], [_147252|_147254], [], _122058)
^  Call: (259) [user] subst_vars(return, _147252, [], _148192)
^  Unify: (259) [user] subst_vars(return, return, [], [])
   Call: (260) [system] var(return)
^  Redo: (259) [user] subst_vars(return, _147252, [], _148192)
^  Unify: (259) [user] subst_vars(return, _147252, [], _148192)
   Call: (260) [system] atom(return)
   Exit: (260) [system] atom(return)
^  Call: (260) [user] symbol_concat($, _154710, return)
^  Unify: (260) [user] symbol_concat($, _154710, return)
   Call: (261) [system] atom_concat($, _154710, return)
   Fail: (261) [system] atom_concat($, _154710, return)
^  Fail: (260) [user] symbol_concat($, _154710, return)
^  Redo: (259) [user] subst_vars(return, _147252, [], _148192)
^  Unify: (259) [user] subst_vars(return, _147252, [], _148192)
   Call: (260) [system] compound(return)
^  Redo: (259) [user] subst_vars(return, _147252, [], _148192)
^  Unify: (259) [user] subst_vars(return, return, [], [])
^  Exit: (259) [user] subst_vars(return, return, [], [])
^  Call: (259) [user] subst_vars([[->, 'Atom', 'ReturnType']], _147254, [], _122058)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'ReturnType']], [[->, 'Atom', 'ReturnType']], [], [])
   Call: (260) [system] var([[->, 'Atom', 'ReturnType']])
^  Redo: (259) [user] subst_vars([[->, 'Atom', 'ReturnType']], _147254, [], _122058)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'ReturnType']], [_168710|_168712], [], _122058)
^  Call: (260) [user] subst_vars([->, 'Atom', 'ReturnType'], _168710, [], _169650)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'ReturnType'], [->, 'Atom', 'ReturnType'], [], [])
   Call: (261) [system] var([->, 'Atom', 'ReturnType'])
^  Redo: (260) [user] subst_vars([->, 'Atom', 'ReturnType'], _168710, [], _169650)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'ReturnType'], [_173386|_173388], [], _169650)
^  Call: (261) [user] subst_vars(->, _173386, [], _174326)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
   Call: (262) [system] var(->)
^  Redo: (261) [user] subst_vars(->, _173386, [], _174326)
^  Unify: (261) [user] subst_vars(->, _173386, [], _174326)
   Call: (262) [system] atom(->)
   Exit: (262) [system] atom(->)
^  Call: (262) [user] symbol_concat($, _180844, ->)
^  Unify: (262) [user] symbol_concat($, _180844, ->)
   Call: (263) [system] atom_concat($, _180844, ->)
   Fail: (263) [system] atom_concat($, _180844, ->)
^  Fail: (262) [user] symbol_concat($, _180844, ->)
^  Redo: (261) [user] subst_vars(->, _173386, [], _174326)
^  Unify: (261) [user] subst_vars(->, _173386, [], _174326)
   Call: (262) [system] compound(->)
^  Redo: (261) [user] subst_vars(->, _173386, [], _174326)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
^  Exit: (261) [user] subst_vars(->, ->, [], [])
^  Call: (261) [user] subst_vars(['Atom', 'ReturnType'], _173388, [], _169650)
^  Unify: (261) [user] subst_vars(['Atom', 'ReturnType'], ['Atom', 'ReturnType'], [], [])
   Call: (262) [system] var(['Atom', 'ReturnType'])
^  Redo: (261) [user] subst_vars(['Atom', 'ReturnType'], _173388, [], _169650)
^  Unify: (261) [user] subst_vars(['Atom', 'ReturnType'], [_194844|_194846], [], _169650)
^  Call: (262) [user] subst_vars('Atom', _194844, [], _195784)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (263) [system] var('Atom')
^  Redo: (262) [user] subst_vars('Atom', _194844, [], _195784)
^  Unify: (262) [user] subst_vars('Atom', _194844, [], _195784)
   Call: (263) [system] atom('Atom')
   Exit: (263) [system] atom('Atom')
^  Call: (263) [user] symbol_concat($, _202302, 'Atom')
^  Unify: (263) [user] symbol_concat($, _202302, 'Atom')
   Call: (264) [system] atom_concat($, _202302, 'Atom')
   Fail: (264) [system] atom_concat($, _202302, 'Atom')
^  Fail: (263) [user] symbol_concat($, _202302, 'Atom')
^  Redo: (262) [user] subst_vars('Atom', _194844, [], _195784)
^  Unify: (262) [user] subst_vars('Atom', _194844, [], _195784)
   Call: (263) [system] compound('Atom')
^  Redo: (262) [user] subst_vars('Atom', _194844, [], _195784)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (262) [user] subst_vars(['ReturnType'], _194846, [], _169650)
^  Unify: (262) [user] subst_vars(['ReturnType'], ['ReturnType'], [], [])
   Call: (263) [system] var(['ReturnType'])
^  Redo: (262) [user] subst_vars(['ReturnType'], _194846, [], _169650)
^  Unify: (262) [user] subst_vars(['ReturnType'], [_216302|_216304], [], _169650)
^  Call: (263) [user] subst_vars('ReturnType', _216302, [], _217242)
^  Unify: (263) [user] subst_vars('ReturnType', 'ReturnType', [], [])
   Call: (264) [system] var('ReturnType')
^  Redo: (263) [user] subst_vars('ReturnType', _216302, [], _217242)
^  Unify: (263) [user] subst_vars('ReturnType', _216302, [], _217242)
   Call: (264) [system] atom('ReturnType')
   Exit: (264) [system] atom('ReturnType')
^  Call: (264) [user] symbol_concat($, _223760, 'ReturnType')
^  Unify: (264) [user] symbol_concat($, _223760, 'ReturnType')
   Call: (265) [system] atom_concat($, _223760, 'ReturnType')
   Fail: (265) [system] atom_concat($, _223760, 'ReturnType')
^  Fail: (264) [user] symbol_concat($, _223760, 'ReturnType')
^  Redo: (263) [user] subst_vars('ReturnType', _216302, [], _217242)
^  Unify: (263) [user] subst_vars('ReturnType', _216302, [], _217242)
   Call: (264) [system] compound('ReturnType')
^  Redo: (263) [user] subst_vars('ReturnType', _216302, [], _217242)
^  Unify: (263) [user] subst_vars('ReturnType', 'ReturnType', [], [])
^  Exit: (263) [user] subst_vars('ReturnType', 'ReturnType', [], [])
^  Call: (263) [user] subst_vars([], _216304, [], _169650)
^  Unify: (263) [user] subst_vars([], [], [], [])
   Call: (264) [system] var([])
^  Redo: (263) [user] subst_vars([], _216304, [], _169650)
^  Unify: (263) [user] subst_vars([], [], [], [])
^  Exit: (263) [user] subst_vars([], [], [], [])
^  Exit: (262) [user] subst_vars(['ReturnType'], ['ReturnType'], [], [])
^  Exit: (261) [user] subst_vars(['Atom', 'ReturnType'], ['Atom', 'ReturnType'], [], [])
^  Exit: (260) [user] subst_vars([->, 'Atom', 'ReturnType'], [->, 'Atom', 'ReturnType'], [], [])
^  Call: (260) [user] subst_vars([], _168712, [], _122058)
^  Unify: (260) [user] subst_vars([], [], [], [])
   Call: (261) [system] var([])
^  Redo: (260) [user] subst_vars([], _168712, [], _122058)
^  Unify: (260) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([], [], [], [])
^  Exit: (259) [user] subst_vars([[->, 'Atom', 'ReturnType']], [[->, 'Atom', 'ReturnType']], [], [])
^  Exit: (258) [user] subst_vars([return, [->, 'Atom', 'ReturnType']], [return, [->, 'Atom', 'ReturnType']], [], [])
^  Exit: (257) [user] subst_vars([:, return, [->, 'Atom', 'ReturnType']], [:, return, [->, 'Atom', 'ReturnType']], [], [])
   Call: (257) [system] _250850=metta_file_buffer(+, [:, return, [->, 'Atom', 'ReturnType']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(73, 3, 19, 73))
   Exit: (257) [system] metta_file_buffer(+, [:, return, [->, 'Atom', 'ReturnType']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(73, 3, 19, 73))=metta_file_buffer(+, [:, return, [->, 'Atom', 'ReturnType']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(73, 3, 19, 73))
^  Call: (257) [user] assertz(metta_file_buffer(+, [:, return, [->, 'Atom', 'ReturnType']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(73, 3, 19, 73)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, [:, return, [->, 'Atom', 'ReturnType']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(73, 3, 19, 73)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, return, [->, 'Atom', 'ReturnType']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(73, 3, 19, 73))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, return, [->, 'Atom', 'ReturnType']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(73, 3, 19, 73))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, return, [->, 'Atom', 'ReturnType']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(73, 3, 19, 73))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, return, [->, 'Atom', 'ReturnType']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(73, 3, 19, 73))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
   Redo: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _301644)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _302582))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _302582)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 105)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _301644)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _301644)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_301644))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_301644))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_301644))
   Exit: (259) [system] nonvar(position(_301644))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(105, 4, 31, 105)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(105, 4, 31, 105))
   Call: (257) [user] current_read_mode(file, _322062)
   Unify: (257) [user] current_read_mode(file, _322062)
   Call: (258) [system] nb_current(file_mode, _322062)
   Redo: (257) [user] current_read_mode(file, _322062)
   Call: (258) [system] _322062=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _328512)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _328512)
^  Call: (258) [user] clause(t_l:s_reader_info(_328512), _330458, _330380)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _328512)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _328512)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _328512)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _328512)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _328512)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _328512)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _328512)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _328512)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _344288)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (260) [system] char_type('\n', space)
   Exit: (260) [system] char_type('\n', space)
   Call: (260) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (260) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _328512)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _328512)
   Call: (261) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _328512)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _328512)
   Call: (261) [system] peek_char((0x55aefe44e2f0), _354494)
   Exit: (261) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (261) [system] char_type('\n', space)
   Exit: (261) [system] char_type('\n', space)
   Call: (261) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (261) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _328512)
^  Unify: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _328512)
   Call: (262) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _328512)
^  Unify: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _328512)
   Call: (262) [system] peek_char((0x55aefe44e2f0), _364700)
   Exit: (262) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (262) [system] char_type('(', space)
^  Redo: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _328512)
^  Unify: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _328512)
^  Call: (262) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (262) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (263) [system] string((0x55aefe44e2f0))
^  Redo: (262) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (262) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (262) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _328512)
^  Unify: (262) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _328512)
^  Call: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _328512)
^  Unify: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _328512)
   Call: (264) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _328512)
^  Unify: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _328512)
   Call: (264) [system] peek_char((0x55aefe44e2f0), _380454)
   Exit: (264) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (264) [system] char_type('(', space)
^  Redo: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _328512)
^  Unify: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _328512)
   Call: (264) [system] _385096=(0x55aefe44e2f0)
   Exit: (264) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (264) [user] once((read_position((0x55aefe44e2f0), _386964, _386966, _386968, _386970), read_sexpr((0x55aefe44e2f0), _386982), assertz(metta_file_comment(_386964, _386966, _386968, _386982, _386970))))
^  Unify: (264) [system] once(user:(read_position((0x55aefe44e2f0), _386964, _386966, _386968, _386970), read_sexpr((0x55aefe44e2f0), _386982), assertz(metta_file_comment(_386964, _386966, _386968, _386982, _386970))))
^  Call: (266) [user] read_position((0x55aefe44e2f0), _386964, _386966, _386968, _386970)
^  Unify: (266) [user] read_position((0x55aefe44e2f0), _386964, _386966, _386968, _386970)
   Call: (267) [system] stream_property((0x55aefe44e2f0), position(_386970))
   Unify: (267) [system] stream_property((0x55aefe44e2f0), position(_386970))
   Call: (268) [system] nonvar((0x55aefe44e2f0))
   Exit: (268) [system] nonvar((0x55aefe44e2f0))
   Call: (268) [system] nonvar(position(_386970))
   Exit: (268) [system] nonvar(position(_386970))
   Exit: (267) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(107, 6, 0, 107)))
   Call: (267) [$syspreds] stream_position_data(line_count, '$stream_position'(107, 6, 0, 107), _386964)
   Unify: (267) [$syspreds] stream_position_data(line_count, '$stream_position'(107, 6, 0, 107), _386964)
   Call: (268) [system] nonvar(line_count)
   Exit: (268) [system] nonvar(line_count)
   Call: (268) [$syspreds] stream_position_field(line_count, _400952)
   Unify: (268) [$syspreds] stream_position_field(line_count, 2)
   Exit: (268) [$syspreds] stream_position_field(line_count, 2)
   Call: (268) [system] arg(2, '$stream_position'(107, 6, 0, 107), _386964)
   Exit: (268) [system] arg(2, '$stream_position'(107, 6, 0, 107), 6)
   Exit: (267) [$syspreds] stream_position_data(line_count, '$stream_position'(107, 6, 0, 107), 6)
   Call: (267) [$syspreds] stream_position_data(line_position, '$stream_position'(107, 6, 0, 107), _386966)
   Unify: (267) [$syspreds] stream_position_data(line_position, '$stream_position'(107, 6, 0, 107), _386966)
   Call: (268) [system] nonvar(line_position)
   Exit: (268) [system] nonvar(line_position)
   Call: (268) [$syspreds] stream_position_field(line_position, _410246)
   Unify: (268) [$syspreds] stream_position_field(line_position, 3)
   Exit: (268) [$syspreds] stream_position_field(line_position, 3)
   Call: (268) [system] arg(3, '$stream_position'(107, 6, 0, 107), _386966)
   Exit: (268) [system] arg(3, '$stream_position'(107, 6, 0, 107), 0)
   Exit: (267) [$syspreds] stream_position_data(line_position, '$stream_position'(107, 6, 0, 107), 0)
   Call: (267) [$syspreds] stream_position_data(char_count, '$stream_position'(107, 6, 0, 107), _386968)
   Unify: (267) [$syspreds] stream_position_data(char_count, '$stream_position'(107, 6, 0, 107), _386968)
   Call: (268) [system] nonvar(char_count)
   Exit: (268) [system] nonvar(char_count)
   Call: (268) [$syspreds] stream_position_field(char_count, _419540)
   Unify: (268) [$syspreds] stream_position_field(char_count, 1)
   Exit: (268) [$syspreds] stream_position_field(char_count, 1)
   Call: (268) [system] arg(1, '$stream_position'(107, 6, 0, 107), _386968)
   Exit: (268) [system] arg(1, '$stream_position'(107, 6, 0, 107), 107)
   Exit: (267) [$syspreds] stream_position_data(char_count, '$stream_position'(107, 6, 0, 107), 107)
^  Exit: (266) [user] read_position((0x55aefe44e2f0), 6, 0, 107, '$stream_position'(107, 6, 0, 107))
^  Call: (266) [user] read_sexpr((0x55aefe44e2f0), _386982)
^  Unify: (266) [user] read_sexpr((0x55aefe44e2f0), _386982)
   Call: (267) [system] string((0x55aefe44e2f0))
^  Redo: (266) [user] read_sexpr((0x55aefe44e2f0), _386982)
^  Unify: (266) [user] read_sexpr((0x55aefe44e2f0), _386982)
^  Call: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), _386982)
^  Unify: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), _386982)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _434410)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (269) [system] '('=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', 'white')
^  Redo: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', end_of_line)
^  Redo: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', space)
^  Redo: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] get_char((0x55aefe44e2f0), _451194)
   Exit: (268) [system] get_char((0x55aefe44e2f0), '(')
   Call: (268) [system] '('='('
   Exit: (268) [system] '('='('
^  Call: (268) [user] read_list(')', (0x55aefe44e2f0), _386982)
^  Unify: (268) [user] read_list(')', (0x55aefe44e2f0), _386982)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _458620)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, 'white')
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, end_of_line)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, space)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, cntrl)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _475404)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)=')'
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _386982)
   Call: (269) [system] (:)=end_of_file
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _386982)
^  Call: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _480982)
^  Unify: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _480982)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _484696)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), :)
   Call: (271) [system] (:)=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(:)
^  Unify: (271) [user] is_like_space(:)
   Call: (272) [system] char_type(:, 'white')
^  Redo: (271) [user] is_like_space(:)
^  Unify: (271) [user] is_like_space(:)
   Call: (272) [system] char_type(:, end_of_line)
^  Redo: (271) [user] is_like_space(:)
^  Unify: (271) [user] is_like_space(:)
   Call: (272) [system] char_type(:, space)
^  Redo: (271) [user] is_like_space(:)
^  Unify: (271) [user] is_like_space(:)
   Call: (272) [system] char_type(:, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] get_char((0x55aefe44e2f0), _501480)
   Exit: (270) [system] get_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)='('
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _480982)
   Call: (270) [system] (:)='['
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _480982)
   Call: (270) [system] (:)='{'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _480982)
   Call: (270) [system] (:)='"'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _480982)
   Call: (270) [system] (:)=!
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _480982)
   Call: (270) [system] (:)='\''
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _480982)
   Call: (270) [system] (:)='`'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _480982)
   Call: (270) [system] (:)=end_of_file
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _480982)
^  Call: (270) [user] read_symbolic(')', (0x55aefe44e2f0), :, _480982)
^  Unify: (270) [user] read_symbolic(')', (0x55aefe44e2f0), :, _480982)
^  Call: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _520090)
^  Unify: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _520090)
   Call: (272) [system] peek_char((0x55aefe44e2f0), _521956)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (272) [user] is_delimiter(' ')
^  Unify: (272) [user] is_delimiter(' ')
   Call: (273) [system] char_type(' ', space)
   Exit: (273) [system] char_type(' ', space)
^  Exit: (272) [user] is_delimiter(' ')
   Call: (272) [system] _5986=[]
   Exit: (272) [system] []=[]
^  Exit: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (271) [user] classify_and_convert_charseq(:, [], _5982)
^  Unify: (271) [user] classify_and_convert_charseq(:, [], _5982)
^  Call: (273) [system] setup_call_cleanup('$notrace'(_15120, _15122), once(user:catch(read_from_chars([:], _5982), _15096, fail)), '$restore_trace'(_15120, _15122))
^  Unify: (273) [system] setup_call_cleanup(system:'$notrace'(_15120, _15122), system:once(user:catch(read_from_chars([:], _5982), _15096, fail)), system:'$restore_trace'(_15120, _15122))
^  Call: (274) [system] sig_atomic(system:'$notrace'(_15120, _15122))
^  Exit: (273) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([:], :), _15096, fail)), system:'$restore_trace'(3, -1))
   Call: (272) [system] atomic(:)
   Exit: (272) [system] atomic(:)
^  Exit: (271) [user] classify_and_convert_charseq(:, [], :)
^  Exit: (270) [user] read_symbolic(')', (0x55aefe44e2f0), :, :)
^  Exit: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), :)
^  Call: (269) [user] read_list(')', (0x55aefe44e2f0), _23558)
^  Unify: (269) [user] read_list(')', (0x55aefe44e2f0), _23558)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _27272)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (271) [system] ' '=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(' ')
^  Unify: (271) [user] is_like_space(' ')
   Call: (272) [system] char_type(' ', 'white')
   Exit: (272) [system] char_type(' ', 'white')
^  Exit: (271) [user] is_like_space(' ')
   Call: (271) [system] get_char((0x55aefe44e2f0), _35930)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _39558)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), f)
   Call: (272) [system] f=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(f)
^  Unify: (272) [user] is_like_space(f)
   Call: (273) [system] char_type(f, 'white')
^  Redo: (272) [user] is_like_space(f)
^  Unify: (272) [user] is_like_space(f)
   Call: (273) [system] char_type(f, end_of_line)
^  Redo: (272) [user] is_like_space(f)
^  Unify: (272) [user] is_like_space(f)
   Call: (273) [system] char_type(f, space)
^  Redo: (272) [user] is_like_space(f)
^  Unify: (272) [user] is_like_space(f)
   Call: (273) [system] char_type(f, cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _57266)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), f)
   Call: (270) [system] f=')'
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _23558)
   Call: (270) [system] f=end_of_file
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _23558)
^  Call: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _62844)
^  Unify: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _62844)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _66558)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), f)
   Call: (272) [system] f=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(f)
^  Unify: (272) [user] is_like_space(f)
   Call: (273) [system] char_type(f, 'white')
^  Redo: (272) [user] is_like_space(f)
^  Unify: (272) [user] is_like_space(f)
   Call: (273) [system] char_type(f, end_of_line)
^  Redo: (272) [user] is_like_space(f)
^  Unify: (272) [user] is_like_space(f)
   Call: (273) [system] char_type(f, space)
^  Redo: (272) [user] is_like_space(f)
^  Unify: (272) [user] is_like_space(f)
   Call: (273) [system] char_type(f, cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] get_char((0x55aefe44e2f0), _83342)
   Exit: (271) [system] get_char((0x55aefe44e2f0), f)
   Call: (271) [system] f='('
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _62844)
   Call: (271) [system] f='['
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _62844)
   Call: (271) [system] f='{'
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _62844)
   Call: (271) [system] f='"'
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _62844)
   Call: (271) [system] f=!
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _62844)
   Call: (271) [system] f='\''
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _62844)
   Call: (271) [system] f='`'
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _62844)
   Call: (271) [system] f=end_of_file
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _62844)
^  Call: (271) [user] read_symbolic(')', (0x55aefe44e2f0), f, _62844)
^  Unify: (271) [user] read_symbolic(')', (0x55aefe44e2f0), f, _62844)
^  Call: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _101952)
^  Unify: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _101952)
   Call: (273) [system] peek_char((0x55aefe44e2f0), _103818)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), u)
^  Call: (273) [user] is_delimiter(u)
^  Unify: (273) [user] is_delimiter(u)
   Call: (274) [system] char_type(u, space)
^  Redo: (273) [user] is_delimiter(u)
   Call: (274) [system] arg(_109458, v('(', ')', end_of_file), u)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _101952)
   Call: (273) [system] ')'==u
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _101952)
   Call: (273) [system] get_char((0x55aefe44e2f0), u)
   Exit: (273) [system] get_char((0x55aefe44e2f0), u)
   Call: (273) [system] u=(\)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _101952)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _116824)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _116824)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _118690)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (274) [user] is_delimiter(n)
^  Unify: (274) [user] is_delimiter(n)
   Call: (275) [system] char_type(n, space)
^  Redo: (274) [user] is_delimiter(n)
   Call: (275) [system] arg(_124330, v('(', ')', end_of_file), n)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _116824)
   Call: (274) [system] ')'==n
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _116824)
   Call: (274) [system] get_char((0x55aefe44e2f0), n)
   Exit: (274) [system] get_char((0x55aefe44e2f0), n)
   Call: (274) [system] n=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _116824)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _131696)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _131696)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _133562)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), c)
^  Call: (275) [user] is_delimiter(c)
^  Unify: (275) [user] is_delimiter(c)
   Call: (276) [system] char_type(c, space)
^  Redo: (275) [user] is_delimiter(c)
   Call: (276) [system] arg(_139202, v('(', ')', end_of_file), c)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _131696)
   Call: (275) [system] ')'==c
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _131696)
   Call: (275) [system] get_char((0x55aefe44e2f0), c)
   Exit: (275) [system] get_char((0x55aefe44e2f0), c)
   Call: (275) [system] c=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _131696)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _146568)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _146568)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _148434)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (276) [user] is_delimiter(t)
^  Unify: (276) [user] is_delimiter(t)
   Call: (277) [system] char_type(t, space)
^  Redo: (276) [user] is_delimiter(t)
   Call: (277) [system] arg(_154074, v('(', ')', end_of_file), t)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _146568)
   Call: (276) [system] ')'==t
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _146568)
   Call: (276) [system] get_char((0x55aefe44e2f0), t)
   Exit: (276) [system] get_char((0x55aefe44e2f0), t)
   Call: (276) [system] t=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _146568)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _161440)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _161440)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _163306)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (277) [user] is_delimiter(i)
^  Unify: (277) [user] is_delimiter(i)
   Call: (278) [system] char_type(i, space)
^  Redo: (277) [user] is_delimiter(i)
   Call: (278) [system] arg(_168946, v('(', ')', end_of_file), i)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _161440)
   Call: (277) [system] ')'==i
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _161440)
   Call: (277) [system] get_char((0x55aefe44e2f0), i)
   Exit: (277) [system] get_char((0x55aefe44e2f0), i)
   Call: (277) [system] i=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _161440)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _176312)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _176312)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _178178)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (278) [user] is_delimiter(o)
^  Unify: (278) [user] is_delimiter(o)
   Call: (279) [system] char_type(o, space)
^  Redo: (278) [user] is_delimiter(o)
   Call: (279) [system] arg(_183818, v('(', ')', end_of_file), o)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _176312)
   Call: (278) [system] ')'==o
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _176312)
   Call: (278) [system] get_char((0x55aefe44e2f0), o)
   Exit: (278) [system] get_char((0x55aefe44e2f0), o)
   Call: (278) [system] o=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _176312)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _191184)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _191184)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _193050)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (279) [user] is_delimiter(n)
^  Unify: (279) [user] is_delimiter(n)
   Call: (280) [system] char_type(n, space)
^  Redo: (279) [user] is_delimiter(n)
   Call: (280) [system] arg(_198690, v('(', ')', end_of_file), n)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _191184)
   Call: (279) [system] ')'==n
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _191184)
   Call: (279) [system] get_char((0x55aefe44e2f0), n)
   Exit: (279) [system] get_char((0x55aefe44e2f0), n)
   Call: (279) [system] n=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _191184)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _206056)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _206056)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _207922)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (280) [user] is_delimiter(' ')
^  Unify: (280) [user] is_delimiter(' ')
   Call: (281) [system] char_type(' ', space)
   Exit: (281) [system] char_type(' ', space)
^  Exit: (280) [user] is_delimiter(' ')
   Call: (280) [system] _206056=[]
   Exit: (280) [system] []=[]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (279) [system] _191184=[n]
   Exit: (279) [system] [n]=[n]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (278) [system] _176312=[o, n]
   Exit: (278) [system] [o, n]=[o, n]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, n])
   Call: (277) [system] _161440=[i, o, n]
   Exit: (277) [system] [i, o, n]=[i, o, n]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, o, n])
   Call: (276) [system] _146568=[t, i, o, n]
   Exit: (276) [system] [t, i, o, n]=[t, i, o, n]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, i, o, n])
   Call: (275) [system] _131696=[c, t, i, o, n]
   Exit: (275) [system] [c, t, i, o, n]=[c, t, i, o, n]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [c, t, i, o, n])
   Call: (274) [system] _116824=[n, c, t, i, o, n]
   Exit: (274) [system] [n, c, t, i, o, n]=[n, c, t, i, o, n]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n, c, t, i, o, n])
   Call: (273) [system] _101952=[u, n, c, t, i, o, n]
   Exit: (273) [system] [u, n, c, t, i, o, n]=[u, n, c, t, i, o, n]
^  Exit: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [u, n, c, t, i, o, n])
^  Call: (272) [user] classify_and_convert_charseq(f, [u, n, c, t, i, o, n], _62844)
^  Unify: (272) [user] classify_and_convert_charseq(f, [u, n, c, t, i, o, n], _62844)
^  Call: (274) [system] setup_call_cleanup('$notrace'(_238646, _238648), once(user:catch(read_from_chars([f, u, n, c, t, i, o, n], _62844), _238622, fail)), '$restore_trace'(_238646, _238648))
^  Unify: (274) [system] setup_call_cleanup(system:'$notrace'(_238646, _238648), system:once(user:catch(read_from_chars([f, u, n, c, t, i, o, n], _62844), _238622, fail)), system:'$restore_trace'(_238646, _238648))
^  Call: (275) [system] sig_atomic(system:'$notrace'(_238646, _238648))
^  Exit: (274) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([f, u, n, c, t, i, o, n], function), _238622, fail)), system:'$restore_trace'(3, -1))
   Call: (273) [system] atomic(function)
   Exit: (273) [system] atomic(function)
^  Exit: (272) [user] classify_and_convert_charseq(f, [u, n, c, t, i, o, n], function)
^  Exit: (271) [user] read_symbolic(')', (0x55aefe44e2f0), f, function)
^  Exit: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), function)
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _247084)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _247084)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _250798)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (272) [system] ' '=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(' ')
^  Unify: (272) [user] is_like_space(' ')
   Call: (273) [system] char_type(' ', 'white')
   Exit: (273) [system] char_type(' ', 'white')
^  Exit: (272) [user] is_like_space(' ')
   Call: (272) [system] get_char((0x55aefe44e2f0), _259456)
   Exit: (272) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _263084)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (273) [system] '('=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', 'white')
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', end_of_line)
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', space)
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _280792)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('=')'
^  Redo: (270) [user] read_list(')', (0x55aefe44e2f0), _247084)
   Call: (271) [system] '('=end_of_file
^  Redo: (270) [user] read_list(')', (0x55aefe44e2f0), _247084)
^  Call: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _286370)
^  Unify: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _286370)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _290084)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (273) [system] '('=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', 'white')
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', end_of_line)
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', space)
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] get_char((0x55aefe44e2f0), _306868)
   Exit: (272) [system] get_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('='('
   Exit: (272) [system] '('='('
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _286370)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _286370)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _314294)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, 'white')
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, end_of_line)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, space)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _331078)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _286370)
   Call: (273) [system] (-)=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _286370)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _336656)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _336656)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _340370)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), -)
   Call: (275) [system] (-)=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(-)
^  Unify: (275) [user] is_like_space(-)
   Call: (276) [system] char_type(-, 'white')
^  Redo: (275) [user] is_like_space(-)
^  Unify: (275) [user] is_like_space(-)
   Call: (276) [system] char_type(-, end_of_line)
^  Redo: (275) [user] is_like_space(-)
^  Unify: (275) [user] is_like_space(-)
   Call: (276) [system] char_type(-, space)
^  Redo: (275) [user] is_like_space(-)
^  Unify: (275) [user] is_like_space(-)
   Call: (276) [system] char_type(-, cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _357154)
   Exit: (274) [system] get_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)='('
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _336656)
   Call: (274) [system] (-)='['
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _336656)
   Call: (274) [system] (-)='{'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _336656)
   Call: (274) [system] (-)='"'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _336656)
   Call: (274) [system] (-)=!
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _336656)
   Call: (274) [system] (-)='\''
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _336656)
   Call: (274) [system] (-)='`'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _336656)
   Call: (274) [system] (-)=end_of_file
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _336656)
^  Call: (274) [user] read_symbolic(')', (0x55aefe44e2f0), -, _336656)
^  Unify: (274) [user] read_symbolic(')', (0x55aefe44e2f0), -, _336656)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _375764)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _375764)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _377630)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), >)
^  Call: (276) [user] is_delimiter(>)
^  Unify: (276) [user] is_delimiter(>)
   Call: (277) [system] char_type(>, space)
^  Redo: (276) [user] is_delimiter(>)
   Call: (277) [system] arg(_383270, v('(', ')', end_of_file), >)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _375764)
   Call: (276) [system] ')'==(>)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _375764)
   Call: (276) [system] get_char((0x55aefe44e2f0), >)
   Exit: (276) [system] get_char((0x55aefe44e2f0), >)
   Call: (276) [system] (>)=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _375764)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _390636)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _390636)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _392502)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (277) [user] is_delimiter(' ')
^  Unify: (277) [user] is_delimiter(' ')
   Call: (278) [system] char_type(' ', space)
   Exit: (278) [system] char_type(' ', space)
^  Exit: (277) [user] is_delimiter(' ')
   Call: (277) [system] _390636=[]
   Exit: (277) [system] []=[]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (276) [system] _375764=[>]
   Exit: (276) [system] [>]=[>]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [>])
^  Call: (275) [user] classify_and_convert_charseq(-, [>], _336656)
^  Unify: (275) [user] classify_and_convert_charseq(-, [>], _336656)
^  Call: (277) [system] setup_call_cleanup('$notrace'(_406462, _406464), once(user:catch(read_from_chars([-, >], _336656), _406438, fail)), '$restore_trace'(_406462, _406464))
^  Unify: (277) [system] setup_call_cleanup(system:'$notrace'(_406462, _406464), system:once(user:catch(read_from_chars([-, >], _336656), _406438, fail)), system:'$restore_trace'(_406462, _406464))
^  Call: (278) [system] sig_atomic(system:'$notrace'(_406462, _406464))
^  Exit: (277) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([-, >], ->), _406438, fail)), system:'$restore_trace'(3, -1))
   Call: (276) [system] atomic(->)
   Exit: (276) [system] atomic(->)
^  Exit: (275) [user] classify_and_convert_charseq(-, [>], ->)
^  Exit: (274) [user] read_symbolic(')', (0x55aefe44e2f0), -, ->)
^  Exit: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), ->)
^  Call: (273) [user] read_list(')', (0x55aefe44e2f0), _414900)
^  Unify: (273) [user] read_list(')', (0x55aefe44e2f0), _414900)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _418614)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (275) [system] ' '=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(' ')
^  Unify: (275) [user] is_like_space(' ')
   Call: (276) [system] char_type(' ', 'white')
   Exit: (276) [system] char_type(' ', 'white')
^  Exit: (275) [user] is_like_space(' ')
   Call: (275) [system] get_char((0x55aefe44e2f0), _427272)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _430900)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _448608)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (274) [system] 'A'=')'
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _414900)
   Call: (274) [system] 'A'=end_of_file
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _414900)
^  Call: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _454186)
^  Unify: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _454186)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _457900)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] get_char((0x55aefe44e2f0), _474684)
   Exit: (275) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'='('
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _454186)
   Call: (275) [system] 'A'='['
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _454186)
   Call: (275) [system] 'A'='{'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _454186)
   Call: (275) [system] 'A'='"'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _454186)
   Call: (275) [system] 'A'=!
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _454186)
   Call: (275) [system] 'A'='\''
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _454186)
   Call: (275) [system] 'A'='`'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _454186)
   Call: (275) [system] 'A'=end_of_file
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _454186)
^  Call: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _454186)
^  Unify: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _454186)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _493294)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _493294)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _495160)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (277) [user] is_delimiter(t)
^  Unify: (277) [user] is_delimiter(t)
   Call: (278) [system] char_type(t, space)
^  Redo: (277) [user] is_delimiter(t)
   Call: (278) [system] arg(_500800, v('(', ')', end_of_file), t)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _493294)
   Call: (277) [system] ')'==t
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _493294)
   Call: (277) [system] get_char((0x55aefe44e2f0), t)
   Exit: (277) [system] get_char((0x55aefe44e2f0), t)
   Call: (277) [system] t=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _493294)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _508166)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _508166)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _510032)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (278) [user] is_delimiter(o)
^  Unify: (278) [user] is_delimiter(o)
   Call: (279) [system] char_type(o, space)
^  Redo: (278) [user] is_delimiter(o)
   Call: (279) [system] arg(_515672, v('(', ')', end_of_file), o)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _508166)
   Call: (278) [system] ')'==o
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _508166)
   Call: (278) [system] get_char((0x55aefe44e2f0), o)
   Exit: (278) [system] get_char((0x55aefe44e2f0), o)
   Call: (278) [system] o=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _508166)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _523038)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6018)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _6896)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (279) [user] is_delimiter(m)
^  Unify: (279) [user] is_delimiter(m)
   Call: (280) [system] char_type(m, space)
^  Redo: (279) [user] is_delimiter(m)
   Call: (280) [system] arg(_12536, v('(', ')', end_of_file), m)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6018)
   Call: (279) [system] ')'==m
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6018)
   Call: (279) [system] get_char((0x55aefe44e2f0), m)
   Exit: (279) [system] get_char((0x55aefe44e2f0), m)
   Call: (279) [system] m=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6018)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _19902)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _19902)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _21768)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (280) [user] is_delimiter(' ')
^  Unify: (280) [user] is_delimiter(' ')
   Call: (281) [system] char_type(' ', space)
   Exit: (281) [system] char_type(' ', space)
^  Exit: (280) [user] is_delimiter(' ')
   Call: (280) [system] _19902=[]
   Exit: (280) [system] []=[]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (279) [system] _6018=[m]
   Exit: (279) [system] [m]=[m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (278) [system] _6014=[o, m]
   Exit: (278) [system] [o, m]=[o, m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (277) [system] _6010=[t, o, m]
   Exit: (277) [system] [t, o, m]=[t, o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (276) [user] classify_and_convert_charseq('A', [t, o, m], _6006)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _6006)
^  Call: (278) [system] setup_call_cleanup('$notrace'(_41316, _41318), once(user:catch(read_from_chars(['A', t, o, m], _6006), _41292, fail)), '$restore_trace'(_41316, _41318))
^  Unify: (278) [system] setup_call_cleanup(system:'$notrace'(_41316, _41318), system:once(user:catch(read_from_chars(['A', t, o, m], _6006), _41292, fail)), system:'$restore_trace'(_41316, _41318))
^  Call: (279) [system] sig_atomic(system:'$notrace'(_41316, _41318))
^  Exit: (278) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _6006), _41292, fail)), system:'$restore_trace'(3, -1))
   Call: (277) [system] atomic(_6006)
^  Redo: (276) [user] classify_and_convert_charseq('A', [t, o, m], _6006)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _6006)
   Call: (277) [system] atom_chars(_6006, ['A', t, o, m])
   Exit: (277) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (276) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _52570)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _52570)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _56284)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (276) [system] ' '=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(' ')
^  Unify: (276) [user] is_like_space(' ')
   Call: (277) [system] char_type(' ', 'white')
   Exit: (277) [system] char_type(' ', 'white')
^  Exit: (276) [user] is_like_space(' ')
   Call: (276) [system] get_char((0x55aefe44e2f0), _64942)
   Exit: (276) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _68570)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (277) [system] 'A'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', 'white')
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', end_of_line)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', space)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _86278)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=')'
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _52570)
   Call: (275) [system] 'A'=end_of_file
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _52570)
^  Call: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _91856)
^  Unify: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _91856)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _95570)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (277) [system] 'A'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', 'white')
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', end_of_line)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', space)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] get_char((0x55aefe44e2f0), _112354)
   Exit: (276) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'='('
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _91856)
   Call: (276) [system] 'A'='['
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _91856)
   Call: (276) [system] 'A'='{'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _91856)
   Call: (276) [system] 'A'='"'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _91856)
   Call: (276) [system] 'A'=!
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _91856)
   Call: (276) [system] 'A'='\''
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _91856)
   Call: (276) [system] 'A'='`'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _91856)
   Call: (276) [system] 'A'=end_of_file
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _91856)
^  Call: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _91856)
^  Unify: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _91856)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _130964)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _130964)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _132830)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (278) [user] is_delimiter(t)
^  Unify: (278) [user] is_delimiter(t)
   Call: (279) [system] char_type(t, space)
^  Redo: (278) [user] is_delimiter(t)
   Call: (279) [system] arg(_138470, v('(', ')', end_of_file), t)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _130964)
   Call: (278) [system] ')'==t
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _130964)
   Call: (278) [system] get_char((0x55aefe44e2f0), t)
   Exit: (278) [system] get_char((0x55aefe44e2f0), t)
   Call: (278) [system] t=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _130964)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _145836)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _145836)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _147702)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (279) [user] is_delimiter(o)
^  Unify: (279) [user] is_delimiter(o)
   Call: (280) [system] char_type(o, space)
^  Redo: (279) [user] is_delimiter(o)
   Call: (280) [system] arg(_153342, v('(', ')', end_of_file), o)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _145836)
   Call: (279) [system] ')'==o
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _145836)
   Call: (279) [system] get_char((0x55aefe44e2f0), o)
   Exit: (279) [system] get_char((0x55aefe44e2f0), o)
   Call: (279) [system] o=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _145836)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _160708)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _160708)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _162574)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (280) [user] is_delimiter(m)
^  Unify: (280) [user] is_delimiter(m)
   Call: (281) [system] char_type(m, space)
^  Redo: (280) [user] is_delimiter(m)
   Call: (281) [system] arg(_168214, v('(', ')', end_of_file), m)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _160708)
   Call: (280) [system] ')'==m
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _160708)
   Call: (280) [system] get_char((0x55aefe44e2f0), m)
   Exit: (280) [system] get_char((0x55aefe44e2f0), m)
   Call: (280) [system] m=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _160708)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _175580)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _175580)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _177446)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (281) [user] is_delimiter(')')
^  Unify: (281) [user] is_delimiter(')')
   Call: (282) [system] char_type(')', space)
^  Redo: (281) [user] is_delimiter(')')
   Call: (282) [system] arg(_183086, v('(', ')', end_of_file), ')')
   Exit: (282) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (281) [user] is_delimiter(')')
   Call: (281) [system] _175580=[]
   Exit: (281) [system] []=[]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (280) [system] _160708=[m]
   Exit: (280) [system] [m]=[m]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (279) [system] _145836=[o, m]
   Exit: (279) [system] [o, m]=[o, m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (278) [system] _130964=[t, o, m]
   Exit: (278) [system] [t, o, m]=[t, o, m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (277) [user] classify_and_convert_charseq('A', [t, o, m], _91856)
^  Unify: (277) [user] classify_and_convert_charseq('A', [t, o, m], _91856)
^  Call: (279) [system] setup_call_cleanup('$notrace'(_198862, _198864), once(user:catch(read_from_chars(['A', t, o, m], _91856), _198838, fail)), '$restore_trace'(_198862, _198864))
^  Unify: (279) [system] setup_call_cleanup(system:'$notrace'(_198862, _198864), system:once(user:catch(read_from_chars(['A', t, o, m], _91856), _198838, fail)), system:'$restore_trace'(_198862, _198864))
^  Call: (280) [system] sig_atomic(system:'$notrace'(_198862, _198864))
^  Exit: (279) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _91856), _198838, fail)), system:'$restore_trace'(3, -1))
   Call: (278) [system] atomic(_91856)
^  Redo: (277) [user] classify_and_convert_charseq('A', [t, o, m], _91856)
^  Unify: (277) [user] classify_and_convert_charseq('A', [t, o, m], _91856)
   Call: (278) [system] atom_chars(_91856, ['A', t, o, m])
   Exit: (278) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (277) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (275) [user] read_list(')', (0x55aefe44e2f0), _210116)
^  Unify: (275) [user] read_list(')', (0x55aefe44e2f0), _210116)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _213830)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (277) [system] ')'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space(')')
^  Unify: (277) [user] is_like_space(')')
   Call: (278) [system] char_type(')', 'white')
^  Redo: (277) [user] is_like_space(')')
^  Unify: (277) [user] is_like_space(')')
   Call: (278) [system] char_type(')', end_of_line)
^  Redo: (277) [user] is_like_space(')')
^  Unify: (277) [user] is_like_space(')')
   Call: (278) [system] char_type(')', space)
^  Redo: (277) [user] is_like_space(')')
^  Unify: (277) [user] is_like_space(')')
   Call: (278) [system] char_type(')', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _230614)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (276) [system] ')'=')'
   Exit: (276) [system] ')'=')'
   Call: (276) [system] get_char((0x55aefe44e2f0), _234404)
   Exit: (276) [system] get_char((0x55aefe44e2f0), ')')
   Call: (276) [system] _210116=[]
   Exit: (276) [system] []=[]
^  Exit: (275) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (275) [system] _52570=['Atom']
   Exit: (275) [system] ['Atom']=['Atom']
^  Exit: (274) [user] read_list(')', (0x55aefe44e2f0), ['Atom'])
   Call: (274) [system] _6002=['Atom', 'Atom']
   Exit: (274) [system] ['Atom', 'Atom']=['Atom', 'Atom']
^  Exit: (273) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Atom'])
   Call: (273) [system] _5994=[->, 'Atom', 'Atom']
   Exit: (273) [system] [->, 'Atom', 'Atom']=[->, 'Atom', 'Atom']
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), [->, 'Atom', 'Atom'])
^  Exit: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), [->, 'Atom', 'Atom'])
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _248286)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _248286)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _252000)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (273) [system] ')'=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', 'white')
^  Redo: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', end_of_line)
^  Redo: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', space)
^  Redo: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _268784)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (272) [system] ')'=')'
   Exit: (272) [system] ')'=')'
   Call: (272) [system] get_char((0x55aefe44e2f0), _272574)
   Exit: (272) [system] get_char((0x55aefe44e2f0), ')')
   Call: (272) [system] _248286=[]
   Exit: (272) [system] []=[]
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (271) [system] _5990=[[->, 'Atom', 'Atom']]
   Exit: (271) [system] [[->, 'Atom', 'Atom']]=[[->, 'Atom', 'Atom']]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [[->, 'Atom', 'Atom']])
   Call: (270) [system] _5984=[function, [->, 'Atom', 'Atom']]
   Exit: (270) [system] [function, [->, 'Atom', 'Atom']]=[function, [->, 'Atom', 'Atom']]
^  Exit: (269) [user] read_list(')', (0x55aefe44e2f0), [function, [->, 'Atom', 'Atom']])
   Call: (269) [system] _5944=[:, function, [->, 'Atom', 'Atom']]
   Exit: (269) [system] [:, function, [->, 'Atom', 'Atom']]=[:, function, [->, 'Atom', 'Atom']]
^  Exit: (268) [user] read_list(')', (0x55aefe44e2f0), [:, function, [->, 'Atom', 'Atom']])
^  Exit: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), [:, function, [->, 'Atom', 'Atom']])
^  Exit: (266) [user] read_sexpr((0x55aefe44e2f0), [:, function, [->, 'Atom', 'Atom']])
^  Call: (266) [user] assertz(metta_file_comment(6, 0, 107, [:, function, [->, 'Atom', 'Atom']], '$stream_position'(107, 6, 0, 107)))
^  Exit: (266) [user] assertz(metta_file_comment(6, 0, 107, [:, function, [->, 'Atom', 'Atom']], '$stream_position'(107, 6, 0, 107)))
^  Exit: (264) [system] once(user:(read_position((0x55aefe44e2f0), 6, 0, 107, '$stream_position'(107, 6, 0, 107)), read_sexpr((0x55aefe44e2f0), [:, function, [->, 'Atom', 'Atom']]), assertz(metta_file_comment(6, 0, 107, [:, function, [->, 'Atom', 'Atom']], '$stream_position'(107, 6, 0, 107)))))
   Call: (264) [system] fail
^  Redo: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Unify: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Call: (264) [user] retract(metta_file_comment(_292948, _292950, _292952, _292954, _292956))
^  Exit: (264) [user] retract(metta_file_comment(6, 0, 107, [:, function, [->, 'Atom', 'Atom']], '$stream_position'(107, 6, 0, 107)))
^  Call: (264) [user] trly(untyped_to_metta, [:, function, [->, 'Atom', 'Atom']], _5908)
^  Unify: (264) [user] trly(untyped_to_metta, [:, function, [->, 'Atom', 'Atom']], _5908)
^  Call: (265) [user] once(call(untyped_to_metta, [:, function, [->, 'Atom', 'Atom']], _296734))
^  Unify: (265) [system] once(user:call(untyped_to_metta, [:, function, [->, 'Atom', 'Atom']], _296734))
^  Call: (266) [user] call(untyped_to_metta, [:, function, [->, 'Atom', 'Atom']], _296734)
^  Unify: (266) [system] call(user:untyped_to_metta, [:, function, [->, 'Atom', 'Atom']], _296734)
^  Call: (267) [user] untyped_to_metta([:, function, [->, 'Atom', 'Atom']], _296734)
^  Unify: (267) [user] untyped_to_metta([:, function, [->, 'Atom', 'Atom']], _296734)
^  Call: (268) [user] must_det_ll(trly(mfix_vars1, [:, function, [->, 'Atom', 'Atom']], _302346))
^  Unify: (268) [user] must_det_ll(user:trly(mfix_vars1, [:, function, [->, 'Atom', 'Atom']], _302346))
^  Call: (269) [user] once(user:trly(mfix_vars1, [:, function, [->, 'Atom', 'Atom']], _302346))
^  Unify: (269) [system] once(user:trly(mfix_vars1, [:, function, [->, 'Atom', 'Atom']], _302346))
^  Call: (270) [user] trly(mfix_vars1, [:, function, [->, 'Atom', 'Atom']], _302346)
^  Unify: (270) [user] trly(mfix_vars1, [:, function, [->, 'Atom', 'Atom']], _302346)
^  Call: (271) [user] once(call(mfix_vars1, [:, function, [->, 'Atom', 'Atom']], _307932))
^  Unify: (271) [system] once(user:call(mfix_vars1, [:, function, [->, 'Atom', 'Atom']], _307932))
^  Call: (272) [user] call(mfix_vars1, [:, function, [->, 'Atom', 'Atom']], _307932)
^  Unify: (272) [system] call(user:mfix_vars1, [:, function, [->, 'Atom', 'Atom']], _307932)
^  Call: (273) [user] mfix_vars1([:, function, [->, 'Atom', 'Atom']], _307932)
^  Unify: (273) [user] mfix_vars1([:, function, [->, 'Atom', 'Atom']], _307932)
   Call: (274) [system] var([:, function, [->, 'Atom', 'Atom']])
^  Redo: (273) [user] mfix_vars1([:, function, [->, 'Atom', 'Atom']], _307932)
^  Unify: (273) [user] mfix_vars1([:, function, [->, 'Atom', 'Atom']], '$VAR'(_315392))
   Call: (274) [system] atom([:, function, [->, 'Atom', 'Atom']])
^  Redo: (273) [user] mfix_vars1([:, function, [->, 'Atom', 'Atom']], _307932)
^  Unify: (273) [user] mfix_vars1([:, function, [->, 'Atom', 'Atom']], _307932)
   Call: (274) [system] [:, function, [->, 'Atom', 'Atom']]==true
^  Redo: (273) [user] mfix_vars1([:, function, [->, 'Atom', 'Atom']], _307932)
^  Unify: (273) [user] mfix_vars1([:, function, [->, 'Atom', 'Atom']], _307932)
   Call: (274) [system] [:, function, [->, 'Atom', 'Atom']]==false
^  Redo: (273) [user] mfix_vars1([:, function, [->, 'Atom', 'Atom']], _307932)
^  Unify: (273) [user] mfix_vars1([:, function, [->, 'Atom', 'Atom']], _307932)
   Call: (274) [system] (:)=='['
^  Redo: (273) [user] mfix_vars1([:, function, [->, 'Atom', 'Atom']], _307932)
^  Unify: (273) [user] mfix_vars1([:, function, [->, 'Atom', 'Atom']], _307932)
   Call: (274) [system] (:)=='{'
^  Redo: (273) [user] mfix_vars1([:, function, [->, 'Atom', 'Atom']], _307932)
^  Unify: (273) [user] mfix_vars1([:, function, [->, 'Atom', 'Atom']], _307932)
   Call: (274) [system] is_list([function, [->, 'Atom', 'Atom']])
   Exit: (274) [system] is_list([function, [->, 'Atom', 'Atom']])
   Call: (274) [lists] lists:last([function, [->, 'Atom', 'Atom']], _332086)
   Unify: (274) [lists] lists:last([function, [->, 'Atom', 'Atom']], _332086)
   Call: (275) [lists] lists:last_([[->, 'Atom', 'Atom']], function, _332086)
   Unify: (275) [lists] lists:last_([[->, 'Atom', 'Atom']], function, _332086)
   Call: (276) [lists] lists:last_([], [->, 'Atom', 'Atom'], _332086)
   Unify: (276) [lists] lists:last_([], [->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
   Exit: (276) [lists] lists:last_([], [->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
   Exit: (275) [lists] lists:last_([[->, 'Atom', 'Atom']], function, [->, 'Atom', 'Atom'])
   Exit: (274) [lists] lists:last([function, [->, 'Atom', 'Atom']], [->, 'Atom', 'Atom'])
   Call: (274) [system] [->, 'Atom', 'Atom']=='}'
^  Redo: (273) [user] mfix_vars1([:, function, [->, 'Atom', 'Atom']], _307932)
^  Unify: (273) [user] mfix_vars1([:, function, [->, 'Atom', 'Atom']], _307932)
   Call: (274) [system] [:, function, [->, 'Atom', 'Atom']]==[_343250, _343256]
^  Redo: (273) [user] mfix_vars1([:, function, [->, 'Atom', 'Atom']], _307932)
^  Unify: (273) [user] mfix_vars1([:, function, [->, 'Atom', 'Atom']], _307932)
   Call: (274) [system] fail
^  Redo: (273) [user] mfix_vars1([:, function, [->, 'Atom', 'Atom']], _307932)
^  Unify: (273) [user] mfix_vars1([:, function, [->, 'Atom', 'Atom']], _307932)
   Call: (274) [system] is_list([:, function, [->, 'Atom', 'Atom']])
   Exit: (274) [system] is_list([:, function, [->, 'Atom', 'Atom']])
^  Call: (274) [user] apply:maplist(mfix_vars1, [:, function, [->, 'Atom', 'Atom']], _307932)
^  Unify: (274) [apply] apply:maplist(user:mfix_vars1, [:, function, [->, 'Atom', 'Atom']], _307932)
   Call: (275) [apply] apply:maplist_([:, function, [->, 'Atom', 'Atom']], _307932, user:mfix_vars1)
   Unify: (275) [apply] apply:maplist_([:, function, [->, 'Atom', 'Atom']], [_353480|_353482], user:mfix_vars1)
^  Call: (276) [user] mfix_vars1(:, _353480)
^  Unify: (276) [user] mfix_vars1(:, _353480)
   Call: (277) [system] var(:)
^  Redo: (276) [user] mfix_vars1(:, _353480)
^  Unify: (276) [user] mfix_vars1(:, '$VAR'(_358126))
   Call: (277) [system] atom(:)
   Exit: (277) [system] atom(:)
^  Call: (277) [user] symbol_concat($, _360904, :)
^  Unify: (277) [user] symbol_concat($, _360904, :)
   Call: (278) [system] atom_concat($, _360904, :)
   Fail: (278) [system] atom_concat($, _360904, :)
^  Fail: (277) [user] symbol_concat($, _360904, :)
^  Redo: (276) [user] mfix_vars1(:, _353480)
^  Unify: (276) [user] mfix_vars1(:, _353480)
   Call: (277) [system] (:)==true
^  Redo: (276) [user] mfix_vars1(:, _353480)
^  Unify: (276) [user] mfix_vars1(:, _353480)
   Call: (277) [system] (:)==false
^  Redo: (276) [user] mfix_vars1(:, _353480)
^  Unify: (276) [user] mfix_vars1(:, _353480)
   Call: (277) [system] (:)==[_372992, _372998]
^  Redo: (276) [user] mfix_vars1(:, _353480)
^  Unify: (276) [user] mfix_vars1(:, _353480)
   Call: (277) [system] is_list(:)
^  Redo: (276) [user] mfix_vars1(:, _353480)
^  Unify: (276) [user] mfix_vars1(:, _353480)
   Call: (277) [system] string(:)
^  Redo: (276) [user] mfix_vars1(:, _353480)
^  Unify: (276) [user] mfix_vars1(:, _353480)
   Call: (277) [system] compound(:)
^  Redo: (276) [user] mfix_vars1(:, _353480)
^  Unify: (276) [user] mfix_vars1(:, _353480)
^  Call: (277) [user] symbol(:)
^  Unify: (277) [user] symbol(:)
   Call: (278) [system] atom(:)
   Exit: (278) [system] atom(:)
^  Exit: (277) [user] symbol(:)
^  Unify: (276) [user] mfix_vars1(:, :)
^  Exit: (276) [user] mfix_vars1(:, :)
   Call: (276) [apply] apply:maplist_([function, [->, 'Atom', 'Atom']], _353482, user:mfix_vars1)
   Unify: (276) [apply] apply:maplist_([function, [->, 'Atom', 'Atom']], [_391536|_391538], user:mfix_vars1)
^  Call: (277) [user] mfix_vars1(function, _391536)
^  Unify: (277) [user] mfix_vars1(function, _391536)
   Call: (278) [system] var(function)
^  Redo: (277) [user] mfix_vars1(function, _391536)
^  Unify: (277) [user] mfix_vars1(function, '$VAR'(_396182))
   Call: (278) [system] atom(function)
   Exit: (278) [system] atom(function)
^  Call: (278) [user] symbol_concat($, _398960, function)
^  Unify: (278) [user] symbol_concat($, _398960, function)
   Call: (279) [system] atom_concat($, _398960, function)
   Fail: (279) [system] atom_concat($, _398960, function)
^  Fail: (278) [user] symbol_concat($, _398960, function)
^  Redo: (277) [user] mfix_vars1(function, _391536)
^  Unify: (277) [user] mfix_vars1(function, _391536)
   Call: (278) [system] function==true
^  Redo: (277) [user] mfix_vars1(function, _391536)
^  Unify: (277) [user] mfix_vars1(function, _391536)
   Call: (278) [system] function==false
^  Redo: (277) [user] mfix_vars1(function, _391536)
^  Unify: (277) [user] mfix_vars1(function, _391536)
   Call: (278) [system] function==[_411048, _411054]
^  Redo: (277) [user] mfix_vars1(function, _391536)
^  Unify: (277) [user] mfix_vars1(function, _391536)
   Call: (278) [system] is_list(function)
^  Redo: (277) [user] mfix_vars1(function, _391536)
^  Unify: (277) [user] mfix_vars1(function, _391536)
   Call: (278) [system] string(function)
^  Redo: (277) [user] mfix_vars1(function, _391536)
^  Unify: (277) [user] mfix_vars1(function, _391536)
   Call: (278) [system] compound(function)
^  Redo: (277) [user] mfix_vars1(function, _391536)
^  Unify: (277) [user] mfix_vars1(function, _391536)
^  Call: (278) [user] symbol(function)
^  Unify: (278) [user] symbol(function)
   Call: (279) [system] atom(function)
   Exit: (279) [system] atom(function)
^  Exit: (278) [user] symbol(function)
^  Unify: (277) [user] mfix_vars1(function, function)
^  Exit: (277) [user] mfix_vars1(function, function)
   Call: (277) [apply] apply:maplist_([[->, 'Atom', 'Atom']], _391538, user:mfix_vars1)
   Unify: (277) [apply] apply:maplist_([[->, 'Atom', 'Atom']], [_429592|_429594], user:mfix_vars1)
^  Call: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _429592)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _429592)
   Call: (279) [system] var([->, 'Atom', 'Atom'])
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _429592)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], '$VAR'(_434238))
   Call: (279) [system] atom([->, 'Atom', 'Atom'])
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _429592)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _429592)
   Call: (279) [system] [->, 'Atom', 'Atom']==true
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _429592)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _429592)
   Call: (279) [system] [->, 'Atom', 'Atom']==false
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _429592)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _429592)
   Call: (279) [system] (->)=='['
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _429592)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _429592)
   Call: (279) [system] (->)=='{'
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _429592)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _429592)
   Call: (279) [system] is_list(['Atom', 'Atom'])
   Exit: (279) [system] is_list(['Atom', 'Atom'])
   Call: (279) [lists] lists:last(['Atom', 'Atom'], _450932)
   Unify: (279) [lists] lists:last(['Atom', 'Atom'], _450932)
   Call: (280) [lists] lists:last_(['Atom'], 'Atom', _450932)
   Unify: (280) [lists] lists:last_(['Atom'], 'Atom', _450932)
   Call: (281) [lists] lists:last_([], 'Atom', _450932)
   Unify: (281) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (281) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (280) [lists] lists:last_(['Atom'], 'Atom', 'Atom')
   Exit: (279) [lists] lists:last(['Atom', 'Atom'], 'Atom')
   Call: (279) [system] 'Atom'=='}'
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _429592)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _429592)
   Call: (279) [system] [->, 'Atom', 'Atom']==[_462096, _462102]
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _429592)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _429592)
   Call: (279) [system] fail
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _429592)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _429592)
   Call: (279) [system] is_list([->, 'Atom', 'Atom'])
   Exit: (279) [system] is_list([->, 'Atom', 'Atom'])
^  Call: (279) [user] apply:maplist(mfix_vars1, [->, 'Atom', 'Atom'], _429592)
^  Unify: (279) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Atom'], _429592)
   Call: (280) [apply] apply:maplist_([->, 'Atom', 'Atom'], _429592, user:mfix_vars1)
   Unify: (280) [apply] apply:maplist_([->, 'Atom', 'Atom'], [_472326|_472328], user:mfix_vars1)
^  Call: (281) [user] mfix_vars1(->, _472326)
^  Unify: (281) [user] mfix_vars1(->, _472326)
   Call: (282) [system] var(->)
^  Redo: (281) [user] mfix_vars1(->, _472326)
^  Unify: (281) [user] mfix_vars1(->, '$VAR'(_476972))
   Call: (282) [system] atom(->)
   Exit: (282) [system] atom(->)
^  Call: (282) [user] symbol_concat($, _479750, ->)
^  Unify: (282) [user] symbol_concat($, _479750, ->)
   Call: (283) [system] atom_concat($, _479750, ->)
   Fail: (283) [system] atom_concat($, _479750, ->)
^  Fail: (282) [user] symbol_concat($, _479750, ->)
^  Redo: (281) [user] mfix_vars1(->, _472326)
^  Unify: (281) [user] mfix_vars1(->, _472326)
   Call: (282) [system] (->)==true
^  Redo: (281) [user] mfix_vars1(->, _472326)
^  Unify: (281) [user] mfix_vars1(->, _472326)
   Call: (282) [system] (->)==false
^  Redo: (281) [user] mfix_vars1(->, _472326)
^  Unify: (281) [user] mfix_vars1(->, _472326)
   Call: (282) [system] (->)==[_491838, _491844]
^  Redo: (281) [user] mfix_vars1(->, _472326)
^  Unify: (281) [user] mfix_vars1(->, _472326)
   Call: (282) [system] is_list(->)
^  Redo: (281) [user] mfix_vars1(->, _472326)
^  Unify: (281) [user] mfix_vars1(->, _472326)
   Call: (282) [system] string(->)
^  Redo: (281) [user] mfix_vars1(->, _472326)
^  Unify: (281) [user] mfix_vars1(->, _472326)
   Call: (282) [system] compound(->)
^  Redo: (281) [user] mfix_vars1(->, _472326)
^  Unify: (281) [user] mfix_vars1(->, _472326)
^  Call: (282) [user] symbol(->)
^  Unify: (282) [user] symbol(->)
   Call: (283) [system] atom(->)
   Exit: (283) [system] atom(->)
^  Exit: (282) [user] symbol(->)
^  Unify: (281) [user] mfix_vars1(->, ->)
^  Exit: (281) [user] mfix_vars1(->, ->)
   Call: (281) [apply] apply:maplist_(['Atom', 'Atom'], _472328, user:mfix_vars1)
   Unify: (281) [apply] apply:maplist_(['Atom', 'Atom'], [_510382|_510384], user:mfix_vars1)
^  Call: (282) [user] mfix_vars1('Atom', _510382)
^  Unify: (282) [user] mfix_vars1('Atom', _510382)
   Call: (283) [system] var('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _510382)
^  Unify: (282) [user] mfix_vars1('Atom', '$VAR'(_515028))
   Call: (283) [system] atom('Atom')
   Exit: (283) [system] atom('Atom')
^  Call: (283) [user] symbol_concat($, _517806, 'Atom')
^  Unify: (283) [user] symbol_concat($, _517806, 'Atom')
   Call: (284) [system] atom_concat($, _517806, 'Atom')
   Fail: (284) [system] atom_concat($, _517806, 'Atom')
^  Fail: (283) [user] symbol_concat($, _517806, 'Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _510382)
^  Unify: (282) [user] mfix_vars1('Atom', _6044)
   Call: (283) [system] 'Atom'==true
^  Redo: (282) [user] mfix_vars1('Atom', _6044)
^  Unify: (282) [user] mfix_vars1('Atom', _6044)
   Call: (283) [system] 'Atom'==false
^  Redo: (282) [user] mfix_vars1('Atom', _6044)
^  Unify: (282) [user] mfix_vars1('Atom', _6044)
   Call: (283) [system] 'Atom'==[_12010, _12016]
^  Redo: (282) [user] mfix_vars1('Atom', _6044)
^  Unify: (282) [user] mfix_vars1('Atom', _6044)
   Call: (283) [system] is_list('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _6044)
^  Unify: (282) [user] mfix_vars1('Atom', _6044)
   Call: (283) [system] string('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _6044)
^  Unify: (282) [user] mfix_vars1('Atom', _6044)
   Call: (283) [system] compound('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _6044)
^  Unify: (282) [user] mfix_vars1('Atom', _6044)
^  Call: (283) [user] symbol('Atom')
^  Unify: (283) [user] symbol('Atom')
   Call: (284) [system] atom('Atom')
   Exit: (284) [system] atom('Atom')
^  Exit: (283) [user] symbol('Atom')
^  Unify: (282) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (282) [user] mfix_vars1('Atom', 'Atom')
   Call: (282) [apply] apply:maplist_(['Atom'], _6046, user:mfix_vars1)
   Unify: (282) [apply] apply:maplist_(['Atom'], [_30554|_30556], user:mfix_vars1)
^  Call: (283) [user] mfix_vars1('Atom', _30554)
^  Unify: (283) [user] mfix_vars1('Atom', _30554)
   Call: (284) [system] var('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _30554)
^  Unify: (283) [user] mfix_vars1('Atom', '$VAR'(_35200))
   Call: (284) [system] atom('Atom')
   Exit: (284) [system] atom('Atom')
^  Call: (284) [user] symbol_concat($, _37978, 'Atom')
^  Unify: (284) [user] symbol_concat($, _37978, 'Atom')
   Call: (285) [system] atom_concat($, _37978, 'Atom')
   Fail: (285) [system] atom_concat($, _37978, 'Atom')
^  Fail: (284) [user] symbol_concat($, _37978, 'Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _30554)
^  Unify: (283) [user] mfix_vars1('Atom', _30554)
   Call: (284) [system] 'Atom'==true
^  Redo: (283) [user] mfix_vars1('Atom', _30554)
^  Unify: (283) [user] mfix_vars1('Atom', _30554)
   Call: (284) [system] 'Atom'==false
^  Redo: (283) [user] mfix_vars1('Atom', _30554)
^  Unify: (283) [user] mfix_vars1('Atom', _30554)
   Call: (284) [system] 'Atom'==[_50066, _50072]
^  Redo: (283) [user] mfix_vars1('Atom', _30554)
^  Unify: (283) [user] mfix_vars1('Atom', _30554)
   Call: (284) [system] is_list('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _30554)
^  Unify: (283) [user] mfix_vars1('Atom', _30554)
   Call: (284) [system] string('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _30554)
^  Unify: (283) [user] mfix_vars1('Atom', _30554)
   Call: (284) [system] compound('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _30554)
^  Unify: (283) [user] mfix_vars1('Atom', _30554)
^  Call: (284) [user] symbol('Atom')
^  Unify: (284) [user] symbol('Atom')
   Call: (285) [system] atom('Atom')
   Exit: (285) [system] atom('Atom')
^  Exit: (284) [user] symbol('Atom')
^  Unify: (283) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (283) [user] mfix_vars1('Atom', 'Atom')
   Call: (283) [apply] apply:maplist_([], _30556, user:mfix_vars1)
   Unify: (283) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (283) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (282) [apply] apply:maplist_(['Atom'], ['Atom'], user:mfix_vars1)
   Exit: (281) [apply] apply:maplist_(['Atom', 'Atom'], ['Atom', 'Atom'], user:mfix_vars1)
   Exit: (280) [apply] apply:maplist_([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'], user:mfix_vars1)
^  Exit: (279) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
^  Exit: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
   Call: (278) [apply] apply:maplist_([], _6028, user:mfix_vars1)
   Unify: (278) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (278) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (277) [apply] apply:maplist_([[->, 'Atom', 'Atom']], [[->, 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (276) [apply] apply:maplist_([function, [->, 'Atom', 'Atom']], [function, [->, 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (275) [apply] apply:maplist_([:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']], user:mfix_vars1)
^  Exit: (274) [apply] apply:maplist(user:mfix_vars1, [:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']])
^  Exit: (273) [user] mfix_vars1([:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']])
^  Exit: (272) [system] call(user:mfix_vars1, [:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']])
^  Exit: (271) [system] once(user:call(mfix_vars1, [:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']]))
   Call: (271) [system] [:, function, [->, 'Atom', 'Atom']]\=@=[:, function, [->, 'Atom', 'Atom']]
^  Redo: (270) [user] trly(mfix_vars1, [:, function, [->, 'Atom', 'Atom']], _5978)
^  Unify: (270) [user] trly(mfix_vars1, [:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']])
^  Exit: (270) [user] trly(mfix_vars1, [:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']])
^  Exit: (269) [system] once(user:trly(mfix_vars1, [:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']]))
^  Exit: (268) [user] must_det_ll(user:trly(mfix_vars1, [:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']]))
^  Call: (268) [user] must_det_ll(trly(cons_to_c, [:, function, [->, 'Atom', 'Atom']], _90044))
^  Unify: (268) [user] must_det_ll(user:trly(cons_to_c, [:, function, [->, 'Atom', 'Atom']], _90044))
^  Call: (269) [user] once(user:trly(cons_to_c, [:, function, [->, 'Atom', 'Atom']], _90044))
^  Unify: (269) [system] once(user:trly(cons_to_c, [:, function, [->, 'Atom', 'Atom']], _90044))
^  Call: (270) [user] trly(cons_to_c, [:, function, [->, 'Atom', 'Atom']], _90044)
^  Unify: (270) [user] trly(cons_to_c, [:, function, [->, 'Atom', 'Atom']], _90044)
^  Call: (271) [user] once(call(cons_to_c, [:, function, [->, 'Atom', 'Atom']], _95630))
^  Unify: (271) [system] once(user:call(cons_to_c, [:, function, [->, 'Atom', 'Atom']], _95630))
^  Call: (272) [user] call(cons_to_c, [:, function, [->, 'Atom', 'Atom']], _95630)
^  Unify: (272) [system] call(user:cons_to_c, [:, function, [->, 'Atom', 'Atom']], _95630)
^  Call: (273) [user] cons_to_c([:, function, [->, 'Atom', 'Atom']], _95630)
^  Unify: (273) [user] cons_to_c([:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']])
^  Call: (274) [user] no_cons_reduce
^  Unify: (274) [user] no_cons_reduce
^  Exit: (274) [user] no_cons_reduce
^  Exit: (273) [user] cons_to_c([:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']])
^  Exit: (272) [system] call(user:cons_to_c, [:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']])
^  Exit: (271) [system] once(user:call(cons_to_c, [:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']]))
   Call: (271) [system] [:, function, [->, 'Atom', 'Atom']]\=@=[:, function, [->, 'Atom', 'Atom']]
^  Redo: (270) [user] trly(cons_to_c, [:, function, [->, 'Atom', 'Atom']], _90044)
^  Unify: (270) [user] trly(cons_to_c, [:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']])
^  Exit: (270) [user] trly(cons_to_c, [:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']])
^  Exit: (269) [system] once(user:trly(cons_to_c, [:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']]))
^  Exit: (268) [user] must_det_ll(user:trly(cons_to_c, [:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']]))
^  Call: (268) [user] must_det_ll(trly(cons_to_l, [:, function, [->, 'Atom', 'Atom']], _5958))
^  Unify: (268) [user] must_det_ll(user:trly(cons_to_l, [:, function, [->, 'Atom', 'Atom']], _5958))
^  Call: (269) [user] once(user:trly(cons_to_l, [:, function, [->, 'Atom', 'Atom']], _5958))
^  Unify: (269) [system] once(user:trly(cons_to_l, [:, function, [->, 'Atom', 'Atom']], _5958))
^  Call: (270) [user] trly(cons_to_l, [:, function, [->, 'Atom', 'Atom']], _5958)
^  Unify: (270) [user] trly(cons_to_l, [:, function, [->, 'Atom', 'Atom']], _5958)
^  Call: (271) [user] once(call(cons_to_l, [:, function, [->, 'Atom', 'Atom']], _117950))
^  Unify: (271) [system] once(user:call(cons_to_l, [:, function, [->, 'Atom', 'Atom']], _117950))
^  Call: (272) [user] call(cons_to_l, [:, function, [->, 'Atom', 'Atom']], _117950)
^  Unify: (272) [system] call(user:cons_to_l, [:, function, [->, 'Atom', 'Atom']], _117950)
^  Call: (273) [user] cons_to_l([:, function, [->, 'Atom', 'Atom']], _117950)
^  Unify: (273) [user] cons_to_l([:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']])
^  Call: (274) [user] no_cons_reduce
^  Unify: (274) [user] no_cons_reduce
^  Exit: (274) [user] no_cons_reduce
^  Exit: (273) [user] cons_to_l([:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']])
^  Exit: (272) [system] call(user:cons_to_l, [:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']])
^  Exit: (271) [system] once(user:call(cons_to_l, [:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']]))
   Call: (271) [system] [:, function, [->, 'Atom', 'Atom']]\=@=[:, function, [->, 'Atom', 'Atom']]
^  Redo: (270) [user] trly(cons_to_l, [:, function, [->, 'Atom', 'Atom']], _5958)
^  Unify: (270) [user] trly(cons_to_l, [:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']])
^  Exit: (270) [user] trly(cons_to_l, [:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']])
^  Exit: (269) [system] once(user:trly(cons_to_l, [:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']]))
^  Exit: (268) [user] must_det_ll(user:trly(cons_to_l, [:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']]))
^  Exit: (267) [user] untyped_to_metta([:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']])
^  Exit: (266) [system] call(user:untyped_to_metta, [:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']])
^  Exit: (265) [system] once(user:call(untyped_to_metta, [:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']]))
   Call: (265) [system] [:, function, [->, 'Atom', 'Atom']]\=@=[:, function, [->, 'Atom', 'Atom']]
^  Redo: (264) [user] trly(untyped_to_metta, [:, function, [->, 'Atom', 'Atom']], _5908)
^  Unify: (264) [user] trly(untyped_to_metta, [:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']])
^  Exit: (264) [user] trly(untyped_to_metta, [:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']])
^  Exit: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, function, [->, 'Atom', 'Atom']])
   Call: (263) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, function, [->, 'Atom', 'Atom']])))
   Unify: (263) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, function, [->, 'Atom', 'Atom']])))
   Exit: (263) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, function, [->, 'Atom', 'Atom']])))
^  Exit: (262) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, function, [->, 'Atom', 'Atom']])
^  Exit: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, function, [->, 'Atom', 'Atom']])
^  Exit: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, function, [->, 'Atom', 'Atom']])
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, function, [->, 'Atom', 'Atom']])
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, function, [->, 'Atom', 'Atom']])))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, function, [->, 'Atom', 'Atom']])))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, function, [->, 'Atom', 'Atom']])))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, function, [->, 'Atom', 'Atom']])
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), [:, function, [->, 'Atom', 'Atom']])
^  Call: (257) [user] subst_vars([:, function, [->, 'Atom', 'Atom']], _153186, [], _153188)
^  Unify: (257) [user] subst_vars([:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']], [], [])
   Call: (258) [system] var([:, function, [->, 'Atom', 'Atom']])
^  Redo: (257) [user] subst_vars([:, function, [->, 'Atom', 'Atom']], _153186, [], _153188)
^  Unify: (257) [user] subst_vars([:, function, [->, 'Atom', 'Atom']], [_156924|_156926], [], _153188)
^  Call: (258) [user] subst_vars(:, _156924, [], _157864)
^  Unify: (258) [user] subst_vars(:, :, [], [])
   Call: (259) [system] var(:)
^  Redo: (258) [user] subst_vars(:, _156924, [], _157864)
^  Unify: (258) [user] subst_vars(:, _156924, [], _157864)
   Call: (259) [system] atom(:)
   Exit: (259) [system] atom(:)
^  Call: (259) [user] symbol_concat($, _164382, :)
^  Unify: (259) [user] symbol_concat($, _164382, :)
   Call: (260) [system] atom_concat($, _164382, :)
   Fail: (260) [system] atom_concat($, _164382, :)
^  Fail: (259) [user] symbol_concat($, _164382, :)
^  Redo: (258) [user] subst_vars(:, _156924, [], _157864)
^  Unify: (258) [user] subst_vars(:, _156924, [], _157864)
   Call: (259) [system] compound(:)
^  Redo: (258) [user] subst_vars(:, _156924, [], _157864)
^  Unify: (258) [user] subst_vars(:, :, [], [])
^  Exit: (258) [user] subst_vars(:, :, [], [])
^  Call: (258) [user] subst_vars([function, [->, 'Atom', 'Atom']], _156926, [], _153188)
^  Unify: (258) [user] subst_vars([function, [->, 'Atom', 'Atom']], [function, [->, 'Atom', 'Atom']], [], [])
   Call: (259) [system] var([function, [->, 'Atom', 'Atom']])
^  Redo: (258) [user] subst_vars([function, [->, 'Atom', 'Atom']], _156926, [], _153188)
^  Unify: (258) [user] subst_vars([function, [->, 'Atom', 'Atom']], [_178382|_178384], [], _153188)
^  Call: (259) [user] subst_vars(function, _178382, [], _179322)
^  Unify: (259) [user] subst_vars(function, function, [], [])
   Call: (260) [system] var(function)
^  Redo: (259) [user] subst_vars(function, _178382, [], _179322)
^  Unify: (259) [user] subst_vars(function, _178382, [], _179322)
   Call: (260) [system] atom(function)
   Exit: (260) [system] atom(function)
^  Call: (260) [user] symbol_concat($, _185840, function)
^  Unify: (260) [user] symbol_concat($, _185840, function)
   Call: (261) [system] atom_concat($, _185840, function)
   Fail: (261) [system] atom_concat($, _185840, function)
^  Fail: (260) [user] symbol_concat($, _185840, function)
^  Redo: (259) [user] subst_vars(function, _178382, [], _179322)
^  Unify: (259) [user] subst_vars(function, _178382, [], _179322)
   Call: (260) [system] compound(function)
^  Redo: (259) [user] subst_vars(function, _178382, [], _179322)
^  Unify: (259) [user] subst_vars(function, function, [], [])
^  Exit: (259) [user] subst_vars(function, function, [], [])
^  Call: (259) [user] subst_vars([[->, 'Atom', 'Atom']], _178384, [], _153188)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Atom']], [[->, 'Atom', 'Atom']], [], [])
   Call: (260) [system] var([[->, 'Atom', 'Atom']])
^  Redo: (259) [user] subst_vars([[->, 'Atom', 'Atom']], _178384, [], _153188)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Atom']], [_199840|_199842], [], _153188)
^  Call: (260) [user] subst_vars([->, 'Atom', 'Atom'], _199840, [], _200780)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'], [], [])
   Call: (261) [system] var([->, 'Atom', 'Atom'])
^  Redo: (260) [user] subst_vars([->, 'Atom', 'Atom'], _199840, [], _200780)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Atom'], [_204516|_204518], [], _200780)
^  Call: (261) [user] subst_vars(->, _204516, [], _205456)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
   Call: (262) [system] var(->)
^  Redo: (261) [user] subst_vars(->, _204516, [], _205456)
^  Unify: (261) [user] subst_vars(->, _204516, [], _205456)
   Call: (262) [system] atom(->)
   Exit: (262) [system] atom(->)
^  Call: (262) [user] symbol_concat($, _211974, ->)
^  Unify: (262) [user] symbol_concat($, _211974, ->)
   Call: (263) [system] atom_concat($, _211974, ->)
   Fail: (263) [system] atom_concat($, _211974, ->)
^  Fail: (262) [user] symbol_concat($, _211974, ->)
^  Redo: (261) [user] subst_vars(->, _204516, [], _205456)
^  Unify: (261) [user] subst_vars(->, _204516, [], _205456)
   Call: (262) [system] compound(->)
^  Redo: (261) [user] subst_vars(->, _204516, [], _205456)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
^  Exit: (261) [user] subst_vars(->, ->, [], [])
^  Call: (261) [user] subst_vars(['Atom', 'Atom'], _204518, [], _200780)
^  Unify: (261) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
   Call: (262) [system] var(['Atom', 'Atom'])
^  Redo: (261) [user] subst_vars(['Atom', 'Atom'], _204518, [], _200780)
^  Unify: (261) [user] subst_vars(['Atom', 'Atom'], [_225974|_225976], [], _200780)
^  Call: (262) [user] subst_vars('Atom', _225974, [], _226914)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (263) [system] var('Atom')
^  Redo: (262) [user] subst_vars('Atom', _225974, [], _226914)
^  Unify: (262) [user] subst_vars('Atom', _225974, [], _226914)
   Call: (263) [system] atom('Atom')
   Exit: (263) [system] atom('Atom')
^  Call: (263) [user] symbol_concat($, _233432, 'Atom')
^  Unify: (263) [user] symbol_concat($, _233432, 'Atom')
   Call: (264) [system] atom_concat($, _233432, 'Atom')
   Fail: (264) [system] atom_concat($, _233432, 'Atom')
^  Fail: (263) [user] symbol_concat($, _233432, 'Atom')
^  Redo: (262) [user] subst_vars('Atom', _225974, [], _226914)
^  Unify: (262) [user] subst_vars('Atom', _225974, [], _226914)
   Call: (263) [system] compound('Atom')
^  Redo: (262) [user] subst_vars('Atom', _225974, [], _226914)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (262) [user] subst_vars(['Atom'], _225976, [], _200780)
^  Unify: (262) [user] subst_vars(['Atom'], ['Atom'], [], [])
   Call: (263) [system] var(['Atom'])
^  Redo: (262) [user] subst_vars(['Atom'], _225976, [], _200780)
^  Unify: (262) [user] subst_vars(['Atom'], [_247432|_247434], [], _200780)
^  Call: (263) [user] subst_vars('Atom', _247432, [], _248372)
^  Unify: (263) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (264) [system] var('Atom')
^  Redo: (263) [user] subst_vars('Atom', _247432, [], _248372)
^  Unify: (263) [user] subst_vars('Atom', _247432, [], _248372)
   Call: (264) [system] atom('Atom')
   Exit: (264) [system] atom('Atom')
^  Call: (264) [user] symbol_concat($, _254890, 'Atom')
^  Unify: (264) [user] symbol_concat($, _254890, 'Atom')
   Call: (265) [system] atom_concat($, _254890, 'Atom')
   Fail: (265) [system] atom_concat($, _254890, 'Atom')
^  Fail: (264) [user] symbol_concat($, _254890, 'Atom')
^  Redo: (263) [user] subst_vars('Atom', _247432, [], _248372)
^  Unify: (263) [user] subst_vars('Atom', _247432, [], _248372)
   Call: (264) [system] compound('Atom')
^  Redo: (263) [user] subst_vars('Atom', _247432, [], _248372)
^  Unify: (263) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (263) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (263) [user] subst_vars([], _247434, [], _200780)
^  Unify: (263) [user] subst_vars([], [], [], [])
   Call: (264) [system] var([])
^  Redo: (263) [user] subst_vars([], _247434, [], _200780)
^  Unify: (263) [user] subst_vars([], [], [], [])
^  Exit: (263) [user] subst_vars([], [], [], [])
^  Exit: (262) [user] subst_vars(['Atom'], ['Atom'], [], [])
^  Exit: (261) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
^  Exit: (260) [user] subst_vars([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'], [], [])
^  Call: (260) [user] subst_vars([], _199842, [], _153188)
^  Unify: (260) [user] subst_vars([], [], [], [])
   Call: (261) [system] var([])
^  Redo: (260) [user] subst_vars([], _199842, [], _153188)
^  Unify: (260) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([], [], [], [])
^  Exit: (259) [user] subst_vars([[->, 'Atom', 'Atom']], [[->, 'Atom', 'Atom']], [], [])
^  Exit: (258) [user] subst_vars([function, [->, 'Atom', 'Atom']], [function, [->, 'Atom', 'Atom']], [], [])
^  Exit: (257) [user] subst_vars([:, function, [->, 'Atom', 'Atom']], [:, function, [->, 'Atom', 'Atom']], [], [])
   Call: (257) [system] _281980=metta_file_buffer(+, [:, function, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(105, 4, 31, 105))
   Exit: (257) [system] metta_file_buffer(+, [:, function, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(105, 4, 31, 105))=metta_file_buffer(+, [:, function, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(105, 4, 31, 105))
^  Call: (257) [user] assertz(metta_file_buffer(+, [:, function, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(105, 4, 31, 105)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, [:, function, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(105, 4, 31, 105)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, function, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(105, 4, 31, 105))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, function, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(105, 4, 31, 105))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, function, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(105, 4, 31, 105))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, function, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(105, 4, 31, 105))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
   Redo: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _332774)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _333712))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _333712)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 134)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _332774)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _332774)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_332774))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_332774))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_332774))
   Exit: (259) [system] nonvar(position(_332774))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(134, 6, 27, 134)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(134, 6, 27, 134))
   Call: (257) [user] current_read_mode(file, _353192)
   Unify: (257) [user] current_read_mode(file, _353192)
   Call: (258) [system] nb_current(file_mode, _353192)
   Redo: (257) [user] current_read_mode(file, _353192)
   Call: (258) [system] _353192=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _359642)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _359642)
^  Call: (258) [user] clause(t_l:s_reader_info(_359642), _361588, _361510)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _359642)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _359642)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _359642)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _359642)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _359642)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _359642)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _359642)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _359642)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _375418)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (260) [system] char_type('\n', space)
   Exit: (260) [system] char_type('\n', space)
   Call: (260) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (260) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _359642)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _359642)
   Call: (261) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _359642)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _359642)
   Call: (261) [system] peek_char((0x55aefe44e2f0), _385624)
   Exit: (261) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (261) [system] char_type('(', space)
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _359642)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _359642)
^  Call: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (262) [system] string((0x55aefe44e2f0))
^  Redo: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _359642)
^  Unify: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _359642)
^  Call: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _359642)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _359642)
   Call: (263) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _359642)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _359642)
   Call: (263) [system] peek_char((0x55aefe44e2f0), _401378)
   Exit: (263) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (263) [system] char_type('(', space)
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _359642)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _359642)
   Call: (263) [system] _406020=(0x55aefe44e2f0)
   Exit: (263) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (263) [user] once((read_position((0x55aefe44e2f0), _407888, _407890, _407892, _407894), read_sexpr((0x55aefe44e2f0), _407906), assertz(metta_file_comment(_407888, _407890, _407892, _407906, _407894))))
^  Unify: (263) [system] once(user:(read_position((0x55aefe44e2f0), _407888, _407890, _407892, _407894), read_sexpr((0x55aefe44e2f0), _407906), assertz(metta_file_comment(_407888, _407890, _407892, _407906, _407894))))
^  Call: (265) [user] read_position((0x55aefe44e2f0), _407888, _407890, _407892, _407894)
^  Unify: (265) [user] read_position((0x55aefe44e2f0), _407888, _407890, _407892, _407894)
   Call: (266) [system] stream_property((0x55aefe44e2f0), position(_407894))
   Unify: (266) [system] stream_property((0x55aefe44e2f0), position(_407894))
   Call: (267) [system] nonvar((0x55aefe44e2f0))
   Exit: (267) [system] nonvar((0x55aefe44e2f0))
   Call: (267) [system] nonvar(position(_407894))
   Exit: (267) [system] nonvar(position(_407894))
   Exit: (266) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(135, 7, 0, 135)))
   Call: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(135, 7, 0, 135), _407888)
   Unify: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(135, 7, 0, 135), _407888)
   Call: (267) [system] nonvar(line_count)
   Exit: (267) [system] nonvar(line_count)
   Call: (267) [$syspreds] stream_position_field(line_count, _421876)
   Unify: (267) [$syspreds] stream_position_field(line_count, 2)
   Exit: (267) [$syspreds] stream_position_field(line_count, 2)
   Call: (267) [system] arg(2, '$stream_position'(135, 7, 0, 135), _407888)
   Exit: (267) [system] arg(2, '$stream_position'(135, 7, 0, 135), 7)
   Exit: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(135, 7, 0, 135), 7)
   Call: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(135, 7, 0, 135), _407890)
   Unify: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(135, 7, 0, 135), _407890)
   Call: (267) [system] nonvar(line_position)
   Exit: (267) [system] nonvar(line_position)
   Call: (267) [$syspreds] stream_position_field(line_position, _431170)
   Unify: (267) [$syspreds] stream_position_field(line_position, 3)
   Exit: (267) [$syspreds] stream_position_field(line_position, 3)
   Call: (267) [system] arg(3, '$stream_position'(135, 7, 0, 135), _407890)
   Exit: (267) [system] arg(3, '$stream_position'(135, 7, 0, 135), 0)
   Exit: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(135, 7, 0, 135), 0)
   Call: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(135, 7, 0, 135), _407892)
   Unify: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(135, 7, 0, 135), _407892)
   Call: (267) [system] nonvar(char_count)
   Exit: (267) [system] nonvar(char_count)
   Call: (267) [$syspreds] stream_position_field(char_count, _440464)
   Unify: (267) [$syspreds] stream_position_field(char_count, 1)
   Exit: (267) [$syspreds] stream_position_field(char_count, 1)
   Call: (267) [system] arg(1, '$stream_position'(135, 7, 0, 135), _407892)
   Exit: (267) [system] arg(1, '$stream_position'(135, 7, 0, 135), 135)
   Exit: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(135, 7, 0, 135), 135)
^  Exit: (265) [user] read_position((0x55aefe44e2f0), 7, 0, 135, '$stream_position'(135, 7, 0, 135))
^  Call: (265) [user] read_sexpr((0x55aefe44e2f0), _407906)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _407906)
   Call: (266) [system] string((0x55aefe44e2f0))
^  Redo: (265) [user] read_sexpr((0x55aefe44e2f0), _407906)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _407906)
^  Call: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _407906)
^  Unify: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _407906)
^  Call: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _455334)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (268) [system] '('=(;)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', 'white')
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', end_of_line)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', space)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', cntrl)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (267) [system] get_char((0x55aefe44e2f0), _472118)
   Exit: (267) [system] get_char((0x55aefe44e2f0), '(')
   Call: (267) [system] '('='('
   Exit: (267) [system] '('='('
^  Call: (267) [user] read_list(')', (0x55aefe44e2f0), _407906)
^  Unify: (267) [user] read_list(')', (0x55aefe44e2f0), _407906)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _479544)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, 'white')
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, end_of_line)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, space)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _496328)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), :)
   Call: (268) [system] (:)=')'
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _407906)
   Call: (268) [system] (:)=end_of_file
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _407906)
^  Call: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _501906)
^  Unify: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _501906)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _505620)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, 'white')
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, end_of_line)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, space)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, cntrl)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] get_char((0x55aefe44e2f0), _522404)
   Exit: (269) [system] get_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)='('
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _5980)
   Call: (269) [system] (:)='['
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _5980)
   Call: (269) [system] (:)='{'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _5980)
   Call: (269) [system] (:)='"'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _5980)
   Call: (269) [system] (:)=!
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _5980)
   Call: (269) [system] (:)='\''
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _5980)
   Call: (269) [system] (:)='`'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _5980)
   Call: (269) [system] (:)=end_of_file
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _5980)
^  Call: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _5980)
^  Unify: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _5980)
^  Call: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _23088)
^  Unify: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _23088)
   Call: (271) [system] peek_char((0x55aefe44e2f0), _24954)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] is_delimiter(' ')
^  Unify: (271) [user] is_delimiter(' ')
   Call: (272) [system] char_type(' ', space)
   Exit: (272) [system] char_type(' ', space)
^  Exit: (271) [user] is_delimiter(' ')
   Call: (271) [system] _23088=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (270) [user] classify_and_convert_charseq(:, [], _5980)
^  Unify: (270) [user] classify_and_convert_charseq(:, [], _5980)
^  Call: (272) [system] setup_call_cleanup('$notrace'(_36120, _36122), once(user:catch(read_from_chars([:], _5980), _36096, fail)), '$restore_trace'(_36120, _36122))
^  Unify: (272) [system] setup_call_cleanup(system:'$notrace'(_36120, _36122), system:once(user:catch(read_from_chars([:], _5980), _36096, fail)), system:'$restore_trace'(_36120, _36122))
^  Call: (273) [system] sig_atomic(system:'$notrace'(_36120, _36122))
^  Exit: (272) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([:], :), _36096, fail)), system:'$restore_trace'(3, -1))
   Call: (271) [system] atomic(:)
   Exit: (271) [system] atomic(:)
^  Exit: (270) [user] classify_and_convert_charseq(:, [], :)
^  Exit: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, :)
^  Exit: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), :)
^  Call: (268) [user] read_list(')', (0x55aefe44e2f0), _44558)
^  Unify: (268) [user] read_list(')', (0x55aefe44e2f0), _44558)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _48272)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (270) [system] ' '=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(' ')
^  Unify: (270) [user] is_like_space(' ')
   Call: (271) [system] char_type(' ', 'white')
   Exit: (271) [system] char_type(' ', 'white')
^  Exit: (270) [user] is_like_space(' ')
   Call: (270) [system] get_char((0x55aefe44e2f0), _56930)
   Exit: (270) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _60558)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), e)
   Call: (271) [system] e=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(e)
^  Unify: (271) [user] is_like_space(e)
   Call: (272) [system] char_type(e, 'white')
^  Redo: (271) [user] is_like_space(e)
^  Unify: (271) [user] is_like_space(e)
   Call: (272) [system] char_type(e, end_of_line)
^  Redo: (271) [user] is_like_space(e)
^  Unify: (271) [user] is_like_space(e)
   Call: (272) [system] char_type(e, space)
^  Redo: (271) [user] is_like_space(e)
^  Unify: (271) [user] is_like_space(e)
   Call: (272) [system] char_type(e, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _78266)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), e)
   Call: (269) [system] e=')'
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _44558)
   Call: (269) [system] e=end_of_file
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _44558)
^  Call: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _83844)
^  Unify: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _83844)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _87558)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), e)
   Call: (271) [system] e=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(e)
^  Unify: (271) [user] is_like_space(e)
   Call: (272) [system] char_type(e, 'white')
^  Redo: (271) [user] is_like_space(e)
^  Unify: (271) [user] is_like_space(e)
   Call: (272) [system] char_type(e, end_of_line)
^  Redo: (271) [user] is_like_space(e)
^  Unify: (271) [user] is_like_space(e)
   Call: (272) [system] char_type(e, space)
^  Redo: (271) [user] is_like_space(e)
^  Unify: (271) [user] is_like_space(e)
   Call: (272) [system] char_type(e, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] get_char((0x55aefe44e2f0), _104342)
   Exit: (270) [system] get_char((0x55aefe44e2f0), e)
   Call: (270) [system] e='('
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _83844)
   Call: (270) [system] e='['
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _83844)
   Call: (270) [system] e='{'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _83844)
   Call: (270) [system] e='"'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _83844)
   Call: (270) [system] e=!
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _83844)
   Call: (270) [system] e='\''
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _83844)
   Call: (270) [system] e='`'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _83844)
   Call: (270) [system] e=end_of_file
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _83844)
^  Call: (270) [user] read_symbolic(')', (0x55aefe44e2f0), e, _83844)
^  Unify: (270) [user] read_symbolic(')', (0x55aefe44e2f0), e, _83844)
^  Call: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _122952)
^  Unify: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _122952)
   Call: (272) [system] peek_char((0x55aefe44e2f0), _124818)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), v)
^  Call: (272) [user] is_delimiter(v)
^  Unify: (272) [user] is_delimiter(v)
   Call: (273) [system] char_type(v, space)
^  Redo: (272) [user] is_delimiter(v)
   Call: (273) [system] arg(_130458, v('(', ')', end_of_file), v)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _122952)
   Call: (272) [system] ')'==v
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _122952)
   Call: (272) [system] get_char((0x55aefe44e2f0), v)
   Exit: (272) [system] get_char((0x55aefe44e2f0), v)
   Call: (272) [system] v=(\)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _122952)
^  Call: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137824)
^  Unify: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137824)
   Call: (273) [system] peek_char((0x55aefe44e2f0), _139690)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (273) [user] is_delimiter(a)
^  Unify: (273) [user] is_delimiter(a)
   Call: (274) [system] char_type(a, space)
^  Redo: (273) [user] is_delimiter(a)
   Call: (274) [system] arg(_145330, v('(', ')', end_of_file), a)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137824)
   Call: (273) [system] ')'==a
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137824)
   Call: (273) [system] get_char((0x55aefe44e2f0), a)
   Exit: (273) [system] get_char((0x55aefe44e2f0), a)
   Call: (273) [system] a=(\)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137824)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152696)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152696)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _154562)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (274) [user] is_delimiter(l)
^  Unify: (274) [user] is_delimiter(l)
   Call: (275) [system] char_type(l, space)
^  Redo: (274) [user] is_delimiter(l)
   Call: (275) [system] arg(_160202, v('(', ')', end_of_file), l)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152696)
   Call: (274) [system] ')'==l
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152696)
   Call: (274) [system] get_char((0x55aefe44e2f0), l)
   Exit: (274) [system] get_char((0x55aefe44e2f0), l)
   Call: (274) [system] l=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152696)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _167568)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _167568)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _169434)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] is_delimiter(' ')
^  Unify: (275) [user] is_delimiter(' ')
   Call: (276) [system] char_type(' ', space)
   Exit: (276) [system] char_type(' ', space)
^  Exit: (275) [user] is_delimiter(' ')
   Call: (275) [system] _167568=[]
   Exit: (275) [system] []=[]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (274) [system] _152696=[l]
   Exit: (274) [system] [l]=[l]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l])
   Call: (273) [system] _137824=[a, l]
   Exit: (273) [system] [a, l]=[a, l]
^  Exit: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, l])
   Call: (272) [system] _122952=[v, a, l]
   Exit: (272) [system] [v, a, l]=[v, a, l]
^  Exit: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [v, a, l])
^  Call: (271) [user] classify_and_convert_charseq(e, [v, a, l], _83844)
^  Unify: (271) [user] classify_and_convert_charseq(e, [v, a, l], _83844)
^  Call: (273) [system] setup_call_cleanup('$notrace'(_188982, _188984), once(user:catch(read_from_chars([e, v, a, l], _83844), _188958, fail)), '$restore_trace'(_188982, _188984))
^  Unify: (273) [system] setup_call_cleanup(system:'$notrace'(_188982, _188984), system:once(user:catch(read_from_chars([e, v, a, l], _83844), _188958, fail)), system:'$restore_trace'(_188982, _188984))
^  Call: (274) [system] sig_atomic(system:'$notrace'(_188982, _188984))
^  Exit: (273) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([e, v, a, l], eval), _188958, fail)), system:'$restore_trace'(3, -1))
   Call: (272) [system] atomic(eval)
   Exit: (272) [system] atomic(eval)
^  Exit: (271) [user] classify_and_convert_charseq(e, [v, a, l], eval)
^  Exit: (270) [user] read_symbolic(')', (0x55aefe44e2f0), e, eval)
^  Exit: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), eval)
^  Call: (269) [user] read_list(')', (0x55aefe44e2f0), _197420)
^  Unify: (269) [user] read_list(')', (0x55aefe44e2f0), _197420)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _201134)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (271) [system] ' '=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(' ')
^  Unify: (271) [user] is_like_space(' ')
   Call: (272) [system] char_type(' ', 'white')
   Exit: (272) [system] char_type(' ', 'white')
^  Exit: (271) [user] is_like_space(' ')
   Call: (271) [system] get_char((0x55aefe44e2f0), _209792)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _213420)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _231128)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (270) [system] '('=')'
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _197420)
   Call: (270) [system] '('=end_of_file
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _197420)
^  Call: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _236706)
^  Unify: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _236706)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _240420)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] get_char((0x55aefe44e2f0), _257204)
   Exit: (271) [system] get_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('='('
   Exit: (271) [system] '('='('
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _236706)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _236706)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _264630)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, 'white')
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, end_of_line)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, space)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _281414)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), -)
   Call: (272) [system] (-)=')'
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _236706)
   Call: (272) [system] (-)=end_of_file
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _236706)
^  Call: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _286992)
^  Unify: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _286992)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _290706)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, 'white')
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, end_of_line)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, space)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] get_char((0x55aefe44e2f0), _307490)
   Exit: (273) [system] get_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)='('
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _286992)
   Call: (273) [system] (-)='['
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _286992)
   Call: (273) [system] (-)='{'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _286992)
   Call: (273) [system] (-)='"'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _286992)
   Call: (273) [system] (-)=!
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _286992)
   Call: (273) [system] (-)='\''
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _286992)
   Call: (273) [system] (-)='`'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _286992)
   Call: (273) [system] (-)=end_of_file
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _286992)
^  Call: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _286992)
^  Unify: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _286992)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _326100)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _326100)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _327966)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), >)
^  Call: (275) [user] is_delimiter(>)
^  Unify: (275) [user] is_delimiter(>)
   Call: (276) [system] char_type(>, space)
^  Redo: (275) [user] is_delimiter(>)
   Call: (276) [system] arg(_333606, v('(', ')', end_of_file), >)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _326100)
   Call: (275) [system] ')'==(>)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _326100)
   Call: (275) [system] get_char((0x55aefe44e2f0), >)
   Exit: (275) [system] get_char((0x55aefe44e2f0), >)
   Call: (275) [system] (>)=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _326100)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _340972)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _340972)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _342838)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] is_delimiter(' ')
^  Unify: (276) [user] is_delimiter(' ')
   Call: (277) [system] char_type(' ', space)
   Exit: (277) [system] char_type(' ', space)
^  Exit: (276) [user] is_delimiter(' ')
   Call: (276) [system] _340972=[]
   Exit: (276) [system] []=[]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (275) [system] _326100=[>]
   Exit: (275) [system] [>]=[>]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [>])
^  Call: (274) [user] classify_and_convert_charseq(-, [>], _286992)
^  Unify: (274) [user] classify_and_convert_charseq(-, [>], _286992)
^  Call: (276) [system] setup_call_cleanup('$notrace'(_356798, _356800), once(user:catch(read_from_chars([-, >], _286992), _356774, fail)), '$restore_trace'(_356798, _356800))
^  Unify: (276) [system] setup_call_cleanup(system:'$notrace'(_356798, _356800), system:once(user:catch(read_from_chars([-, >], _286992), _356774, fail)), system:'$restore_trace'(_356798, _356800))
^  Call: (277) [system] sig_atomic(system:'$notrace'(_356798, _356800))
^  Exit: (276) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([-, >], ->), _356774, fail)), system:'$restore_trace'(3, -1))
   Call: (275) [system] atomic(->)
   Exit: (275) [system] atomic(->)
^  Exit: (274) [user] classify_and_convert_charseq(-, [>], ->)
^  Exit: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, ->)
^  Exit: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), ->)
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _365236)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _365236)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _368950)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (274) [system] ' '=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(' ')
^  Unify: (274) [user] is_like_space(' ')
   Call: (275) [system] char_type(' ', 'white')
   Exit: (275) [system] char_type(' ', 'white')
^  Exit: (274) [user] is_like_space(' ')
   Call: (274) [system] get_char((0x55aefe44e2f0), _377608)
   Exit: (274) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _381236)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', 'white')
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', end_of_line)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', space)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _398944)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (273) [system] 'A'=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _365236)
   Call: (273) [system] 'A'=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _365236)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _404522)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _404522)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _408236)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', 'white')
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', end_of_line)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', space)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _425020)
   Exit: (274) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (274) [system] 'A'='('
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _404522)
   Call: (274) [system] 'A'='['
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _404522)
   Call: (274) [system] 'A'='{'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _404522)
   Call: (274) [system] 'A'='"'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _404522)
   Call: (274) [system] 'A'=!
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _404522)
   Call: (274) [system] 'A'='\''
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _404522)
   Call: (274) [system] 'A'='`'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _404522)
   Call: (274) [system] 'A'=end_of_file
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _404522)
^  Call: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _404522)
^  Unify: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _404522)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _443630)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _443630)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _445496)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (276) [user] is_delimiter(t)
^  Unify: (276) [user] is_delimiter(t)
   Call: (277) [system] char_type(t, space)
^  Redo: (276) [user] is_delimiter(t)
   Call: (277) [system] arg(_451136, v('(', ')', end_of_file), t)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _443630)
   Call: (276) [system] ')'==t
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _443630)
   Call: (276) [system] get_char((0x55aefe44e2f0), t)
   Exit: (276) [system] get_char((0x55aefe44e2f0), t)
   Call: (276) [system] t=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _443630)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _458502)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _458502)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _460368)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (277) [user] is_delimiter(o)
^  Unify: (277) [user] is_delimiter(o)
   Call: (278) [system] char_type(o, space)
^  Redo: (277) [user] is_delimiter(o)
   Call: (278) [system] arg(_466008, v('(', ')', end_of_file), o)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _458502)
   Call: (277) [system] ')'==o
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _458502)
   Call: (277) [system] get_char((0x55aefe44e2f0), o)
   Exit: (277) [system] get_char((0x55aefe44e2f0), o)
   Call: (277) [system] o=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _458502)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _473374)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _473374)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _475240)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (278) [user] is_delimiter(m)
^  Unify: (278) [user] is_delimiter(m)
   Call: (279) [system] char_type(m, space)
^  Redo: (278) [user] is_delimiter(m)
   Call: (279) [system] arg(_480880, v('(', ')', end_of_file), m)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _473374)
   Call: (278) [system] ')'==m
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _473374)
   Call: (278) [system] get_char((0x55aefe44e2f0), m)
   Exit: (278) [system] get_char((0x55aefe44e2f0), m)
   Call: (278) [system] m=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _473374)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _488246)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _488246)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _490112)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (279) [user] is_delimiter(' ')
^  Unify: (279) [user] is_delimiter(' ')
   Call: (280) [system] char_type(' ', space)
   Exit: (280) [system] char_type(' ', space)
^  Exit: (279) [user] is_delimiter(' ')
   Call: (279) [system] _488246=[]
   Exit: (279) [system] []=[]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (278) [system] _473374=[m]
   Exit: (278) [system] [m]=[m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (277) [system] _458502=[o, m]
   Exit: (277) [system] [o, m]=[o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (276) [system] _443630=[t, o, m]
   Exit: (276) [system] [t, o, m]=[t, o, m]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (275) [user] classify_and_convert_charseq('A', [t, o, m], _404522)
^  Unify: (275) [user] classify_and_convert_charseq('A', [t, o, m], _404522)
^  Call: (277) [system] setup_call_cleanup('$notrace'(_509660, _509662), once(user:catch(read_from_chars(['A', t, o, m], _404522), _509636, fail)), '$restore_trace'(_509660, _509662))
^  Unify: (277) [system] setup_call_cleanup(system:'$notrace'(_509660, _509662), system:once(user:catch(read_from_chars(['A', t, o, m], _404522), _509636, fail)), system:'$restore_trace'(_509660, _509662))
^  Call: (278) [system] sig_atomic(system:'$notrace'(_509660, _509662))
^  Exit: (277) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _404522), _509636, fail)), system:'$restore_trace'(3, -1))
   Call: (276) [system] atomic(_404522)
^  Redo: (275) [user] classify_and_convert_charseq('A', [t, o, m], _404522)
^  Unify: (275) [user] classify_and_convert_charseq('A', [t, o, m], _404522)
   Call: (276) [system] atom_chars(_404522, ['A', t, o, m])
   Exit: (276) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (275) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (273) [user] read_list(')', (0x55aefe44e2f0), _520914)
^  Unify: (273) [user] read_list(')', (0x55aefe44e2f0), _520914)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _6714)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (275) [system] ' '=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(' ')
^  Unify: (275) [user] is_like_space(' ')
   Call: (276) [system] char_type(' ', 'white')
   Exit: (276) [system] char_type(' ', 'white')
^  Exit: (275) [user] is_like_space(' ')
   Call: (275) [system] get_char((0x55aefe44e2f0), _15372)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _19000)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _36708)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (274) [system] 'A'=')'
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _6006)
   Call: (274) [system] 'A'=end_of_file
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _6006)
^  Call: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _42286)
^  Unify: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _42286)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _46000)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] get_char((0x55aefe44e2f0), _62784)
   Exit: (275) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'='('
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _42286)
   Call: (275) [system] 'A'='['
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _42286)
   Call: (275) [system] 'A'='{'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _42286)
   Call: (275) [system] 'A'='"'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _42286)
   Call: (275) [system] 'A'=!
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _42286)
   Call: (275) [system] 'A'='\''
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _42286)
   Call: (275) [system] 'A'='`'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _42286)
   Call: (275) [system] 'A'=end_of_file
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _42286)
^  Call: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _42286)
^  Unify: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _42286)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _81394)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _81394)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _83260)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (277) [user] is_delimiter(t)
^  Unify: (277) [user] is_delimiter(t)
   Call: (278) [system] char_type(t, space)
^  Redo: (277) [user] is_delimiter(t)
   Call: (278) [system] arg(_88900, v('(', ')', end_of_file), t)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _81394)
   Call: (277) [system] ')'==t
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _81394)
   Call: (277) [system] get_char((0x55aefe44e2f0), t)
   Exit: (277) [system] get_char((0x55aefe44e2f0), t)
   Call: (277) [system] t=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _81394)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _96266)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _96266)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _98132)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (278) [user] is_delimiter(o)
^  Unify: (278) [user] is_delimiter(o)
   Call: (279) [system] char_type(o, space)
^  Redo: (278) [user] is_delimiter(o)
   Call: (279) [system] arg(_103772, v('(', ')', end_of_file), o)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _96266)
   Call: (278) [system] ')'==o
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _96266)
   Call: (278) [system] get_char((0x55aefe44e2f0), o)
   Exit: (278) [system] get_char((0x55aefe44e2f0), o)
   Call: (278) [system] o=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _96266)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _111138)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _111138)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _113004)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (279) [user] is_delimiter(m)
^  Unify: (279) [user] is_delimiter(m)
   Call: (280) [system] char_type(m, space)
^  Redo: (279) [user] is_delimiter(m)
   Call: (280) [system] arg(_118644, v('(', ')', end_of_file), m)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _111138)
   Call: (279) [system] ')'==m
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _111138)
   Call: (279) [system] get_char((0x55aefe44e2f0), m)
   Exit: (279) [system] get_char((0x55aefe44e2f0), m)
   Call: (279) [system] m=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _111138)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _126010)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _126010)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _127876)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (280) [user] is_delimiter(')')
^  Unify: (280) [user] is_delimiter(')')
   Call: (281) [system] char_type(')', space)
^  Redo: (280) [user] is_delimiter(')')
   Call: (281) [system] arg(_133516, v('(', ')', end_of_file), ')')
   Exit: (281) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (280) [user] is_delimiter(')')
   Call: (280) [system] _126010=[]
   Exit: (280) [system] []=[]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (279) [system] _111138=[m]
   Exit: (279) [system] [m]=[m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (278) [system] _96266=[o, m]
   Exit: (278) [system] [o, m]=[o, m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (277) [system] _81394=[t, o, m]
   Exit: (277) [system] [t, o, m]=[t, o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (276) [user] classify_and_convert_charseq('A', [t, o, m], _42286)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _42286)
^  Call: (278) [system] setup_call_cleanup('$notrace'(_149292, _149294), once(user:catch(read_from_chars(['A', t, o, m], _42286), _149268, fail)), '$restore_trace'(_149292, _149294))
^  Unify: (278) [system] setup_call_cleanup(system:'$notrace'(_149292, _149294), system:once(user:catch(read_from_chars(['A', t, o, m], _42286), _149268, fail)), system:'$restore_trace'(_149292, _149294))
^  Call: (279) [system] sig_atomic(system:'$notrace'(_149292, _149294))
^  Exit: (278) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _42286), _149268, fail)), system:'$restore_trace'(3, -1))
   Call: (277) [system] atomic(_42286)
^  Redo: (276) [user] classify_and_convert_charseq('A', [t, o, m], _42286)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _42286)
   Call: (277) [system] atom_chars(_42286, ['A', t, o, m])
   Exit: (277) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (276) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _160546)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _160546)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _164260)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (276) [system] ')'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', 'white')
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', end_of_line)
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', space)
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _181044)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (275) [system] ')'=')'
   Exit: (275) [system] ')'=')'
   Call: (275) [system] get_char((0x55aefe44e2f0), _184834)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ')')
   Call: (275) [system] _160546=[]
   Exit: (275) [system] []=[]
^  Exit: (274) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (274) [system] _6006=['Atom']
   Exit: (274) [system] ['Atom']=['Atom']
^  Exit: (273) [user] read_list(')', (0x55aefe44e2f0), ['Atom'])
   Call: (273) [system] _6000=['Atom', 'Atom']
   Exit: (273) [system] ['Atom', 'Atom']=['Atom', 'Atom']
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Atom'])
   Call: (272) [system] _5992=[->, 'Atom', 'Atom']
   Exit: (272) [system] [->, 'Atom', 'Atom']=[->, 'Atom', 'Atom']
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [->, 'Atom', 'Atom'])
^  Exit: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), [->, 'Atom', 'Atom'])
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _198716)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _198716)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _202430)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (272) [system] ')'=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', 'white')
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', end_of_line)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', space)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _219214)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (271) [system] ')'=')'
   Exit: (271) [system] ')'=')'
   Call: (271) [system] get_char((0x55aefe44e2f0), _223004)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ')')
   Call: (271) [system] _198716=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (270) [system] _5988=[[->, 'Atom', 'Atom']]
   Exit: (270) [system] [[->, 'Atom', 'Atom']]=[[->, 'Atom', 'Atom']]
^  Exit: (269) [user] read_list(')', (0x55aefe44e2f0), [[->, 'Atom', 'Atom']])
   Call: (269) [system] _5982=[eval, [->, 'Atom', 'Atom']]
   Exit: (269) [system] [eval, [->, 'Atom', 'Atom']]=[eval, [->, 'Atom', 'Atom']]
^  Exit: (268) [user] read_list(')', (0x55aefe44e2f0), [eval, [->, 'Atom', 'Atom']])
   Call: (268) [system] _5942=[:, eval, [->, 'Atom', 'Atom']]
   Exit: (268) [system] [:, eval, [->, 'Atom', 'Atom']]=[:, eval, [->, 'Atom', 'Atom']]
^  Exit: (267) [user] read_list(')', (0x55aefe44e2f0), [:, eval, [->, 'Atom', 'Atom']])
^  Exit: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), [:, eval, [->, 'Atom', 'Atom']])
^  Exit: (265) [user] read_sexpr((0x55aefe44e2f0), [:, eval, [->, 'Atom', 'Atom']])
^  Call: (265) [user] assertz(metta_file_comment(7, 0, 135, [:, eval, [->, 'Atom', 'Atom']], '$stream_position'(135, 7, 0, 135)))
^  Exit: (265) [user] assertz(metta_file_comment(7, 0, 135, [:, eval, [->, 'Atom', 'Atom']], '$stream_position'(135, 7, 0, 135)))
^  Exit: (263) [system] once(user:(read_position((0x55aefe44e2f0), 7, 0, 135, '$stream_position'(135, 7, 0, 135)), read_sexpr((0x55aefe44e2f0), [:, eval, [->, 'Atom', 'Atom']]), assertz(metta_file_comment(7, 0, 135, [:, eval, [->, 'Atom', 'Atom']], '$stream_position'(135, 7, 0, 135)))))
   Call: (263) [system] fail
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Call: (263) [user] retract(metta_file_comment(_243378, _243380, _243382, _243384, _243386))
^  Exit: (263) [user] retract(metta_file_comment(7, 0, 135, [:, eval, [->, 'Atom', 'Atom']], '$stream_position'(135, 7, 0, 135)))
^  Call: (263) [user] trly(untyped_to_metta, [:, eval, [->, 'Atom', 'Atom']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, eval, [->, 'Atom', 'Atom']], _5908)
^  Call: (264) [user] once(call(untyped_to_metta, [:, eval, [->, 'Atom', 'Atom']], _247164))
^  Unify: (264) [system] once(user:call(untyped_to_metta, [:, eval, [->, 'Atom', 'Atom']], _247164))
^  Call: (265) [user] call(untyped_to_metta, [:, eval, [->, 'Atom', 'Atom']], _247164)
^  Unify: (265) [system] call(user:untyped_to_metta, [:, eval, [->, 'Atom', 'Atom']], _247164)
^  Call: (266) [user] untyped_to_metta([:, eval, [->, 'Atom', 'Atom']], _247164)
^  Unify: (266) [user] untyped_to_metta([:, eval, [->, 'Atom', 'Atom']], _247164)
^  Call: (267) [user] must_det_ll(trly(mfix_vars1, [:, eval, [->, 'Atom', 'Atom']], _252776))
^  Unify: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, eval, [->, 'Atom', 'Atom']], _252776))
^  Call: (268) [user] once(user:trly(mfix_vars1, [:, eval, [->, 'Atom', 'Atom']], _252776))
^  Unify: (268) [system] once(user:trly(mfix_vars1, [:, eval, [->, 'Atom', 'Atom']], _252776))
^  Call: (269) [user] trly(mfix_vars1, [:, eval, [->, 'Atom', 'Atom']], _252776)
^  Unify: (269) [user] trly(mfix_vars1, [:, eval, [->, 'Atom', 'Atom']], _252776)
^  Call: (270) [user] once(call(mfix_vars1, [:, eval, [->, 'Atom', 'Atom']], _258362))
^  Unify: (270) [system] once(user:call(mfix_vars1, [:, eval, [->, 'Atom', 'Atom']], _258362))
^  Call: (271) [user] call(mfix_vars1, [:, eval, [->, 'Atom', 'Atom']], _258362)
^  Unify: (271) [system] call(user:mfix_vars1, [:, eval, [->, 'Atom', 'Atom']], _258362)
^  Call: (272) [user] mfix_vars1([:, eval, [->, 'Atom', 'Atom']], _258362)
^  Unify: (272) [user] mfix_vars1([:, eval, [->, 'Atom', 'Atom']], _258362)
   Call: (273) [system] var([:, eval, [->, 'Atom', 'Atom']])
^  Redo: (272) [user] mfix_vars1([:, eval, [->, 'Atom', 'Atom']], _258362)
^  Unify: (272) [user] mfix_vars1([:, eval, [->, 'Atom', 'Atom']], '$VAR'(_265822))
   Call: (273) [system] atom([:, eval, [->, 'Atom', 'Atom']])
^  Redo: (272) [user] mfix_vars1([:, eval, [->, 'Atom', 'Atom']], _258362)
^  Unify: (272) [user] mfix_vars1([:, eval, [->, 'Atom', 'Atom']], _258362)
   Call: (273) [system] [:, eval, [->, 'Atom', 'Atom']]==true
^  Redo: (272) [user] mfix_vars1([:, eval, [->, 'Atom', 'Atom']], _258362)
^  Unify: (272) [user] mfix_vars1([:, eval, [->, 'Atom', 'Atom']], _258362)
   Call: (273) [system] [:, eval, [->, 'Atom', 'Atom']]==false
^  Redo: (272) [user] mfix_vars1([:, eval, [->, 'Atom', 'Atom']], _258362)
^  Unify: (272) [user] mfix_vars1([:, eval, [->, 'Atom', 'Atom']], _258362)
   Call: (273) [system] (:)=='['
^  Redo: (272) [user] mfix_vars1([:, eval, [->, 'Atom', 'Atom']], _258362)
^  Unify: (272) [user] mfix_vars1([:, eval, [->, 'Atom', 'Atom']], _258362)
   Call: (273) [system] (:)=='{'
^  Redo: (272) [user] mfix_vars1([:, eval, [->, 'Atom', 'Atom']], _258362)
^  Unify: (272) [user] mfix_vars1([:, eval, [->, 'Atom', 'Atom']], _258362)
   Call: (273) [system] is_list([eval, [->, 'Atom', 'Atom']])
   Exit: (273) [system] is_list([eval, [->, 'Atom', 'Atom']])
   Call: (273) [lists] lists:last([eval, [->, 'Atom', 'Atom']], _282516)
   Unify: (273) [lists] lists:last([eval, [->, 'Atom', 'Atom']], _282516)
   Call: (274) [lists] lists:last_([[->, 'Atom', 'Atom']], eval, _282516)
   Unify: (274) [lists] lists:last_([[->, 'Atom', 'Atom']], eval, _282516)
   Call: (275) [lists] lists:last_([], [->, 'Atom', 'Atom'], _282516)
   Unify: (275) [lists] lists:last_([], [->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
   Exit: (275) [lists] lists:last_([], [->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
   Exit: (274) [lists] lists:last_([[->, 'Atom', 'Atom']], eval, [->, 'Atom', 'Atom'])
   Exit: (273) [lists] lists:last([eval, [->, 'Atom', 'Atom']], [->, 'Atom', 'Atom'])
   Call: (273) [system] [->, 'Atom', 'Atom']=='}'
^  Redo: (272) [user] mfix_vars1([:, eval, [->, 'Atom', 'Atom']], _258362)
^  Unify: (272) [user] mfix_vars1([:, eval, [->, 'Atom', 'Atom']], _258362)
   Call: (273) [system] [:, eval, [->, 'Atom', 'Atom']]==[_293680, _293686]
^  Redo: (272) [user] mfix_vars1([:, eval, [->, 'Atom', 'Atom']], _258362)
^  Unify: (272) [user] mfix_vars1([:, eval, [->, 'Atom', 'Atom']], _258362)
   Call: (273) [system] fail
^  Redo: (272) [user] mfix_vars1([:, eval, [->, 'Atom', 'Atom']], _258362)
^  Unify: (272) [user] mfix_vars1([:, eval, [->, 'Atom', 'Atom']], _258362)
   Call: (273) [system] is_list([:, eval, [->, 'Atom', 'Atom']])
   Exit: (273) [system] is_list([:, eval, [->, 'Atom', 'Atom']])
^  Call: (273) [user] apply:maplist(mfix_vars1, [:, eval, [->, 'Atom', 'Atom']], _258362)
^  Unify: (273) [apply] apply:maplist(user:mfix_vars1, [:, eval, [->, 'Atom', 'Atom']], _258362)
   Call: (274) [apply] apply:maplist_([:, eval, [->, 'Atom', 'Atom']], _258362, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([:, eval, [->, 'Atom', 'Atom']], [_303910|_303912], user:mfix_vars1)
^  Call: (275) [user] mfix_vars1(:, _303910)
^  Unify: (275) [user] mfix_vars1(:, _303910)
   Call: (276) [system] var(:)
^  Redo: (275) [user] mfix_vars1(:, _303910)
^  Unify: (275) [user] mfix_vars1(:, '$VAR'(_308556))
   Call: (276) [system] atom(:)
   Exit: (276) [system] atom(:)
^  Call: (276) [user] symbol_concat($, _311334, :)
^  Unify: (276) [user] symbol_concat($, _311334, :)
   Call: (277) [system] atom_concat($, _311334, :)
   Fail: (277) [system] atom_concat($, _311334, :)
^  Fail: (276) [user] symbol_concat($, _311334, :)
^  Redo: (275) [user] mfix_vars1(:, _303910)
^  Unify: (275) [user] mfix_vars1(:, _303910)
   Call: (276) [system] (:)==true
^  Redo: (275) [user] mfix_vars1(:, _303910)
^  Unify: (275) [user] mfix_vars1(:, _303910)
   Call: (276) [system] (:)==false
^  Redo: (275) [user] mfix_vars1(:, _303910)
^  Unify: (275) [user] mfix_vars1(:, _303910)
   Call: (276) [system] (:)==[_323422, _323428]
^  Redo: (275) [user] mfix_vars1(:, _303910)
^  Unify: (275) [user] mfix_vars1(:, _303910)
   Call: (276) [system] is_list(:)
^  Redo: (275) [user] mfix_vars1(:, _303910)
^  Unify: (275) [user] mfix_vars1(:, _303910)
   Call: (276) [system] string(:)
^  Redo: (275) [user] mfix_vars1(:, _303910)
^  Unify: (275) [user] mfix_vars1(:, _303910)
   Call: (276) [system] compound(:)
^  Redo: (275) [user] mfix_vars1(:, _303910)
^  Unify: (275) [user] mfix_vars1(:, _303910)
^  Call: (276) [user] symbol(:)
^  Unify: (276) [user] symbol(:)
   Call: (277) [system] atom(:)
   Exit: (277) [system] atom(:)
^  Exit: (276) [user] symbol(:)
^  Unify: (275) [user] mfix_vars1(:, :)
^  Exit: (275) [user] mfix_vars1(:, :)
   Call: (275) [apply] apply:maplist_([eval, [->, 'Atom', 'Atom']], _303912, user:mfix_vars1)
   Unify: (275) [apply] apply:maplist_([eval, [->, 'Atom', 'Atom']], [_341966|_341968], user:mfix_vars1)
^  Call: (276) [user] mfix_vars1(eval, _341966)
^  Unify: (276) [user] mfix_vars1(eval, _341966)
   Call: (277) [system] var(eval)
^  Redo: (276) [user] mfix_vars1(eval, _341966)
^  Unify: (276) [user] mfix_vars1(eval, '$VAR'(_346612))
   Call: (277) [system] atom(eval)
   Exit: (277) [system] atom(eval)
^  Call: (277) [user] symbol_concat($, _349390, eval)
^  Unify: (277) [user] symbol_concat($, _349390, eval)
   Call: (278) [system] atom_concat($, _349390, eval)
   Fail: (278) [system] atom_concat($, _349390, eval)
^  Fail: (277) [user] symbol_concat($, _349390, eval)
^  Redo: (276) [user] mfix_vars1(eval, _341966)
^  Unify: (276) [user] mfix_vars1(eval, _341966)
   Call: (277) [system] eval==true
^  Redo: (276) [user] mfix_vars1(eval, _341966)
^  Unify: (276) [user] mfix_vars1(eval, _341966)
   Call: (277) [system] eval==false
^  Redo: (276) [user] mfix_vars1(eval, _341966)
^  Unify: (276) [user] mfix_vars1(eval, _341966)
   Call: (277) [system] eval==[_361478, _361484]
^  Redo: (276) [user] mfix_vars1(eval, _341966)
^  Unify: (276) [user] mfix_vars1(eval, _341966)
   Call: (277) [system] is_list(eval)
^  Redo: (276) [user] mfix_vars1(eval, _341966)
^  Unify: (276) [user] mfix_vars1(eval, _341966)
   Call: (277) [system] string(eval)
^  Redo: (276) [user] mfix_vars1(eval, _341966)
^  Unify: (276) [user] mfix_vars1(eval, _341966)
   Call: (277) [system] compound(eval)
^  Redo: (276) [user] mfix_vars1(eval, _341966)
^  Unify: (276) [user] mfix_vars1(eval, _341966)
^  Call: (277) [user] symbol(eval)
^  Unify: (277) [user] symbol(eval)
   Call: (278) [system] atom(eval)
   Exit: (278) [system] atom(eval)
^  Exit: (277) [user] symbol(eval)
^  Unify: (276) [user] mfix_vars1(eval, eval)
^  Exit: (276) [user] mfix_vars1(eval, eval)
   Call: (276) [apply] apply:maplist_([[->, 'Atom', 'Atom']], _341968, user:mfix_vars1)
   Unify: (276) [apply] apply:maplist_([[->, 'Atom', 'Atom']], [_380022|_380024], user:mfix_vars1)
^  Call: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _380022)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _380022)
   Call: (278) [system] var([->, 'Atom', 'Atom'])
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _380022)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], '$VAR'(_384668))
   Call: (278) [system] atom([->, 'Atom', 'Atom'])
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _380022)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _380022)
   Call: (278) [system] [->, 'Atom', 'Atom']==true
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _380022)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _380022)
   Call: (278) [system] [->, 'Atom', 'Atom']==false
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _380022)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _380022)
   Call: (278) [system] (->)=='['
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _380022)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _380022)
   Call: (278) [system] (->)=='{'
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _380022)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _380022)
   Call: (278) [system] is_list(['Atom', 'Atom'])
   Exit: (278) [system] is_list(['Atom', 'Atom'])
   Call: (278) [lists] lists:last(['Atom', 'Atom'], _401362)
   Unify: (278) [lists] lists:last(['Atom', 'Atom'], _401362)
   Call: (279) [lists] lists:last_(['Atom'], 'Atom', _401362)
   Unify: (279) [lists] lists:last_(['Atom'], 'Atom', _401362)
   Call: (280) [lists] lists:last_([], 'Atom', _401362)
   Unify: (280) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (280) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (279) [lists] lists:last_(['Atom'], 'Atom', 'Atom')
   Exit: (278) [lists] lists:last(['Atom', 'Atom'], 'Atom')
   Call: (278) [system] 'Atom'=='}'
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _380022)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _380022)
   Call: (278) [system] [->, 'Atom', 'Atom']==[_412526, _412532]
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _380022)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _380022)
   Call: (278) [system] fail
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _380022)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _380022)
   Call: (278) [system] is_list([->, 'Atom', 'Atom'])
   Exit: (278) [system] is_list([->, 'Atom', 'Atom'])
^  Call: (278) [user] apply:maplist(mfix_vars1, [->, 'Atom', 'Atom'], _380022)
^  Unify: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Atom'], _380022)
   Call: (279) [apply] apply:maplist_([->, 'Atom', 'Atom'], _380022, user:mfix_vars1)
   Unify: (279) [apply] apply:maplist_([->, 'Atom', 'Atom'], [_422756|_422758], user:mfix_vars1)
^  Call: (280) [user] mfix_vars1(->, _422756)
^  Unify: (280) [user] mfix_vars1(->, _422756)
   Call: (281) [system] var(->)
^  Redo: (280) [user] mfix_vars1(->, _422756)
^  Unify: (280) [user] mfix_vars1(->, '$VAR'(_427402))
   Call: (281) [system] atom(->)
   Exit: (281) [system] atom(->)
^  Call: (281) [user] symbol_concat($, _430180, ->)
^  Unify: (281) [user] symbol_concat($, _430180, ->)
   Call: (282) [system] atom_concat($, _430180, ->)
   Fail: (282) [system] atom_concat($, _430180, ->)
^  Fail: (281) [user] symbol_concat($, _430180, ->)
^  Redo: (280) [user] mfix_vars1(->, _422756)
^  Unify: (280) [user] mfix_vars1(->, _422756)
   Call: (281) [system] (->)==true
^  Redo: (280) [user] mfix_vars1(->, _422756)
^  Unify: (280) [user] mfix_vars1(->, _422756)
   Call: (281) [system] (->)==false
^  Redo: (280) [user] mfix_vars1(->, _422756)
^  Unify: (280) [user] mfix_vars1(->, _422756)
   Call: (281) [system] (->)==[_442268, _442274]
^  Redo: (280) [user] mfix_vars1(->, _422756)
^  Unify: (280) [user] mfix_vars1(->, _422756)
   Call: (281) [system] is_list(->)
^  Redo: (280) [user] mfix_vars1(->, _422756)
^  Unify: (280) [user] mfix_vars1(->, _422756)
   Call: (281) [system] string(->)
^  Redo: (280) [user] mfix_vars1(->, _422756)
^  Unify: (280) [user] mfix_vars1(->, _422756)
   Call: (281) [system] compound(->)
^  Redo: (280) [user] mfix_vars1(->, _422756)
^  Unify: (280) [user] mfix_vars1(->, _422756)
^  Call: (281) [user] symbol(->)
^  Unify: (281) [user] symbol(->)
   Call: (282) [system] atom(->)
   Exit: (282) [system] atom(->)
^  Exit: (281) [user] symbol(->)
^  Unify: (280) [user] mfix_vars1(->, ->)
^  Exit: (280) [user] mfix_vars1(->, ->)
   Call: (280) [apply] apply:maplist_(['Atom', 'Atom'], _422758, user:mfix_vars1)
   Unify: (280) [apply] apply:maplist_(['Atom', 'Atom'], [_460812|_460814], user:mfix_vars1)
^  Call: (281) [user] mfix_vars1('Atom', _460812)
^  Unify: (281) [user] mfix_vars1('Atom', _460812)
   Call: (282) [system] var('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _460812)
^  Unify: (281) [user] mfix_vars1('Atom', '$VAR'(_465458))
   Call: (282) [system] atom('Atom')
   Exit: (282) [system] atom('Atom')
^  Call: (282) [user] symbol_concat($, _468236, 'Atom')
^  Unify: (282) [user] symbol_concat($, _468236, 'Atom')
   Call: (283) [system] atom_concat($, _468236, 'Atom')
   Fail: (283) [system] atom_concat($, _468236, 'Atom')
^  Fail: (282) [user] symbol_concat($, _468236, 'Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _460812)
^  Unify: (281) [user] mfix_vars1('Atom', _460812)
   Call: (282) [system] 'Atom'==true
^  Redo: (281) [user] mfix_vars1('Atom', _460812)
^  Unify: (281) [user] mfix_vars1('Atom', _460812)
   Call: (282) [system] 'Atom'==false
^  Redo: (281) [user] mfix_vars1('Atom', _460812)
^  Unify: (281) [user] mfix_vars1('Atom', _460812)
   Call: (282) [system] 'Atom'==[_480324, _480330]
^  Redo: (281) [user] mfix_vars1('Atom', _460812)
^  Unify: (281) [user] mfix_vars1('Atom', _460812)
   Call: (282) [system] is_list('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _460812)
^  Unify: (281) [user] mfix_vars1('Atom', _460812)
   Call: (282) [system] string('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _460812)
^  Unify: (281) [user] mfix_vars1('Atom', _460812)
   Call: (282) [system] compound('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _460812)
^  Unify: (281) [user] mfix_vars1('Atom', _460812)
^  Call: (282) [user] symbol('Atom')
^  Unify: (282) [user] symbol('Atom')
   Call: (283) [system] atom('Atom')
   Exit: (283) [system] atom('Atom')
^  Exit: (282) [user] symbol('Atom')
^  Unify: (281) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (281) [user] mfix_vars1('Atom', 'Atom')
   Call: (281) [apply] apply:maplist_(['Atom'], _460814, user:mfix_vars1)
   Unify: (281) [apply] apply:maplist_(['Atom'], [_498868|_498870], user:mfix_vars1)
^  Call: (282) [user] mfix_vars1('Atom', _498868)
^  Unify: (282) [user] mfix_vars1('Atom', _498868)
   Call: (283) [system] var('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _498868)
^  Unify: (282) [user] mfix_vars1('Atom', '$VAR'(_503514))
   Call: (283) [system] atom('Atom')
   Exit: (283) [system] atom('Atom')
^  Call: (283) [user] symbol_concat($, _506292, 'Atom')
^  Unify: (283) [user] symbol_concat($, _506292, 'Atom')
   Call: (284) [system] atom_concat($, _506292, 'Atom')
   Fail: (284) [system] atom_concat($, _506292, 'Atom')
^  Fail: (283) [user] symbol_concat($, _506292, 'Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _498868)
^  Unify: (282) [user] mfix_vars1('Atom', _498868)
   Call: (283) [system] 'Atom'==true
^  Redo: (282) [user] mfix_vars1('Atom', _498868)
^  Unify: (282) [user] mfix_vars1('Atom', _498868)
   Call: (283) [system] 'Atom'==false
^  Redo: (282) [user] mfix_vars1('Atom', _498868)
^  Unify: (282) [user] mfix_vars1('Atom', _498868)
   Call: (283) [system] 'Atom'==[_518380, _518386]
^  Redo: (282) [user] mfix_vars1('Atom', _498868)
^  Unify: (282) [user] mfix_vars1('Atom', _498868)
   Call: (283) [system] is_list('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _498868)
^  Unify: (282) [user] mfix_vars1('Atom', _498868)
   Call: (283) [system] string('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _6048)
^  Unify: (282) [user] mfix_vars1('Atom', _6048)
   Call: (283) [system] compound('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _6048)
^  Unify: (282) [user] mfix_vars1('Atom', _6048)
^  Call: (283) [user] symbol('Atom')
^  Unify: (283) [user] symbol('Atom')
   Call: (284) [system] atom('Atom')
   Exit: (284) [system] atom('Atom')
^  Exit: (283) [user] symbol('Atom')
^  Unify: (282) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (282) [user] mfix_vars1('Atom', 'Atom')
   Call: (282) [apply] apply:maplist_([], _6050, user:mfix_vars1)
   Unify: (282) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (282) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (281) [apply] apply:maplist_(['Atom'], ['Atom'], user:mfix_vars1)
   Exit: (280) [apply] apply:maplist_(['Atom', 'Atom'], ['Atom', 'Atom'], user:mfix_vars1)
   Exit: (279) [apply] apply:maplist_([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'], user:mfix_vars1)
^  Exit: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
^  Exit: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
   Call: (277) [apply] apply:maplist_([], _6026, user:mfix_vars1)
   Unify: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (276) [apply] apply:maplist_([[->, 'Atom', 'Atom']], [[->, 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (275) [apply] apply:maplist_([eval, [->, 'Atom', 'Atom']], [eval, [->, 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']], user:mfix_vars1)
^  Exit: (273) [apply] apply:maplist(user:mfix_vars1, [:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']])
^  Exit: (272) [user] mfix_vars1([:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']])
^  Exit: (271) [system] call(user:mfix_vars1, [:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']])
^  Exit: (270) [system] once(user:call(mfix_vars1, [:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']]))
   Call: (270) [system] [:, eval, [->, 'Atom', 'Atom']]\=@=[:, eval, [->, 'Atom', 'Atom']]
^  Redo: (269) [user] trly(mfix_vars1, [:, eval, [->, 'Atom', 'Atom']], _5976)
^  Unify: (269) [user] trly(mfix_vars1, [:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']])
^  Exit: (269) [user] trly(mfix_vars1, [:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']])
^  Exit: (268) [system] once(user:trly(mfix_vars1, [:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_c, [:, eval, [->, 'Atom', 'Atom']], _40400))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_c, [:, eval, [->, 'Atom', 'Atom']], _40400))
^  Call: (268) [user] once(user:trly(cons_to_c, [:, eval, [->, 'Atom', 'Atom']], _40400))
^  Unify: (268) [system] once(user:trly(cons_to_c, [:, eval, [->, 'Atom', 'Atom']], _40400))
^  Call: (269) [user] trly(cons_to_c, [:, eval, [->, 'Atom', 'Atom']], _40400)
^  Unify: (269) [user] trly(cons_to_c, [:, eval, [->, 'Atom', 'Atom']], _40400)
^  Call: (270) [user] once(call(cons_to_c, [:, eval, [->, 'Atom', 'Atom']], _45986))
^  Unify: (270) [system] once(user:call(cons_to_c, [:, eval, [->, 'Atom', 'Atom']], _45986))
^  Call: (271) [user] call(cons_to_c, [:, eval, [->, 'Atom', 'Atom']], _45986)
^  Unify: (271) [system] call(user:cons_to_c, [:, eval, [->, 'Atom', 'Atom']], _45986)
^  Call: (272) [user] cons_to_c([:, eval, [->, 'Atom', 'Atom']], _45986)
^  Unify: (272) [user] cons_to_c([:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_c([:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']])
^  Exit: (271) [system] call(user:cons_to_c, [:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']])
^  Exit: (270) [system] once(user:call(cons_to_c, [:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']]))
   Call: (270) [system] [:, eval, [->, 'Atom', 'Atom']]\=@=[:, eval, [->, 'Atom', 'Atom']]
^  Redo: (269) [user] trly(cons_to_c, [:, eval, [->, 'Atom', 'Atom']], _40400)
^  Unify: (269) [user] trly(cons_to_c, [:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']])
^  Exit: (269) [user] trly(cons_to_c, [:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']])
^  Exit: (268) [system] once(user:trly(cons_to_c, [:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_c, [:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_l, [:, eval, [->, 'Atom', 'Atom']], _5956))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_l, [:, eval, [->, 'Atom', 'Atom']], _5956))
^  Call: (268) [user] once(user:trly(cons_to_l, [:, eval, [->, 'Atom', 'Atom']], _5956))
^  Unify: (268) [system] once(user:trly(cons_to_l, [:, eval, [->, 'Atom', 'Atom']], _5956))
^  Call: (269) [user] trly(cons_to_l, [:, eval, [->, 'Atom', 'Atom']], _5956)
^  Unify: (269) [user] trly(cons_to_l, [:, eval, [->, 'Atom', 'Atom']], _5956)
^  Call: (270) [user] once(call(cons_to_l, [:, eval, [->, 'Atom', 'Atom']], _68306))
^  Unify: (270) [system] once(user:call(cons_to_l, [:, eval, [->, 'Atom', 'Atom']], _68306))
^  Call: (271) [user] call(cons_to_l, [:, eval, [->, 'Atom', 'Atom']], _68306)
^  Unify: (271) [system] call(user:cons_to_l, [:, eval, [->, 'Atom', 'Atom']], _68306)
^  Call: (272) [user] cons_to_l([:, eval, [->, 'Atom', 'Atom']], _68306)
^  Unify: (272) [user] cons_to_l([:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_l([:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']])
^  Exit: (271) [system] call(user:cons_to_l, [:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']])
^  Exit: (270) [system] once(user:call(cons_to_l, [:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']]))
   Call: (270) [system] [:, eval, [->, 'Atom', 'Atom']]\=@=[:, eval, [->, 'Atom', 'Atom']]
^  Redo: (269) [user] trly(cons_to_l, [:, eval, [->, 'Atom', 'Atom']], _5956)
^  Unify: (269) [user] trly(cons_to_l, [:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']])
^  Exit: (269) [user] trly(cons_to_l, [:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']])
^  Exit: (268) [system] once(user:trly(cons_to_l, [:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_l, [:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']]))
^  Exit: (266) [user] untyped_to_metta([:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']])
^  Exit: (265) [system] call(user:untyped_to_metta, [:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']])
^  Exit: (264) [system] once(user:call(untyped_to_metta, [:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']]))
   Call: (264) [system] [:, eval, [->, 'Atom', 'Atom']]\=@=[:, eval, [->, 'Atom', 'Atom']]
^  Redo: (263) [user] trly(untyped_to_metta, [:, eval, [->, 'Atom', 'Atom']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']])
^  Exit: (263) [user] trly(untyped_to_metta, [:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']])
^  Exit: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, eval, [->, 'Atom', 'Atom']])
   Call: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, eval, [->, 'Atom', 'Atom']])))
   Unify: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, eval, [->, 'Atom', 'Atom']])))
   Exit: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, eval, [->, 'Atom', 'Atom']])))
^  Exit: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, eval, [->, 'Atom', 'Atom']])
^  Exit: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, eval, [->, 'Atom', 'Atom']])
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, eval, [->, 'Atom', 'Atom']])
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, eval, [->, 'Atom', 'Atom']])))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, eval, [->, 'Atom', 'Atom']])))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, eval, [->, 'Atom', 'Atom']])))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, eval, [->, 'Atom', 'Atom']])
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), [:, eval, [->, 'Atom', 'Atom']])
^  Call: (257) [user] subst_vars([:, eval, [->, 'Atom', 'Atom']], _102614, [], _102616)
^  Unify: (257) [user] subst_vars([:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']], [], [])
   Call: (258) [system] var([:, eval, [->, 'Atom', 'Atom']])
^  Redo: (257) [user] subst_vars([:, eval, [->, 'Atom', 'Atom']], _102614, [], _102616)
^  Unify: (257) [user] subst_vars([:, eval, [->, 'Atom', 'Atom']], [_106352|_106354], [], _102616)
^  Call: (258) [user] subst_vars(:, _106352, [], _107292)
^  Unify: (258) [user] subst_vars(:, :, [], [])
   Call: (259) [system] var(:)
^  Redo: (258) [user] subst_vars(:, _106352, [], _107292)
^  Unify: (258) [user] subst_vars(:, _106352, [], _107292)
   Call: (259) [system] atom(:)
   Exit: (259) [system] atom(:)
^  Call: (259) [user] symbol_concat($, _113810, :)
^  Unify: (259) [user] symbol_concat($, _113810, :)
   Call: (260) [system] atom_concat($, _113810, :)
   Fail: (260) [system] atom_concat($, _113810, :)
^  Fail: (259) [user] symbol_concat($, _113810, :)
^  Redo: (258) [user] subst_vars(:, _106352, [], _107292)
^  Unify: (258) [user] subst_vars(:, _106352, [], _107292)
   Call: (259) [system] compound(:)
^  Redo: (258) [user] subst_vars(:, _106352, [], _107292)
^  Unify: (258) [user] subst_vars(:, :, [], [])
^  Exit: (258) [user] subst_vars(:, :, [], [])
^  Call: (258) [user] subst_vars([eval, [->, 'Atom', 'Atom']], _106354, [], _102616)
^  Unify: (258) [user] subst_vars([eval, [->, 'Atom', 'Atom']], [eval, [->, 'Atom', 'Atom']], [], [])
   Call: (259) [system] var([eval, [->, 'Atom', 'Atom']])
^  Redo: (258) [user] subst_vars([eval, [->, 'Atom', 'Atom']], _106354, [], _102616)
^  Unify: (258) [user] subst_vars([eval, [->, 'Atom', 'Atom']], [_127810|_127812], [], _102616)
^  Call: (259) [user] subst_vars(eval, _127810, [], _128750)
^  Unify: (259) [user] subst_vars(eval, eval, [], [])
   Call: (260) [system] var(eval)
^  Redo: (259) [user] subst_vars(eval, _127810, [], _128750)
^  Unify: (259) [user] subst_vars(eval, _127810, [], _128750)
   Call: (260) [system] atom(eval)
   Exit: (260) [system] atom(eval)
^  Call: (260) [user] symbol_concat($, _135268, eval)
^  Unify: (260) [user] symbol_concat($, _135268, eval)
   Call: (261) [system] atom_concat($, _135268, eval)
   Fail: (261) [system] atom_concat($, _135268, eval)
^  Fail: (260) [user] symbol_concat($, _135268, eval)
^  Redo: (259) [user] subst_vars(eval, _127810, [], _128750)
^  Unify: (259) [user] subst_vars(eval, _127810, [], _128750)
   Call: (260) [system] compound(eval)
^  Redo: (259) [user] subst_vars(eval, _127810, [], _128750)
^  Unify: (259) [user] subst_vars(eval, eval, [], [])
^  Exit: (259) [user] subst_vars(eval, eval, [], [])
^  Call: (259) [user] subst_vars([[->, 'Atom', 'Atom']], _127812, [], _102616)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Atom']], [[->, 'Atom', 'Atom']], [], [])
   Call: (260) [system] var([[->, 'Atom', 'Atom']])
^  Redo: (259) [user] subst_vars([[->, 'Atom', 'Atom']], _127812, [], _102616)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Atom']], [_149268|_149270], [], _102616)
^  Call: (260) [user] subst_vars([->, 'Atom', 'Atom'], _149268, [], _150208)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'], [], [])
   Call: (261) [system] var([->, 'Atom', 'Atom'])
^  Redo: (260) [user] subst_vars([->, 'Atom', 'Atom'], _149268, [], _150208)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Atom'], [_153944|_153946], [], _150208)
^  Call: (261) [user] subst_vars(->, _153944, [], _154884)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
   Call: (262) [system] var(->)
^  Redo: (261) [user] subst_vars(->, _153944, [], _154884)
^  Unify: (261) [user] subst_vars(->, _153944, [], _154884)
   Call: (262) [system] atom(->)
   Exit: (262) [system] atom(->)
^  Call: (262) [user] symbol_concat($, _161402, ->)
^  Unify: (262) [user] symbol_concat($, _161402, ->)
   Call: (263) [system] atom_concat($, _161402, ->)
   Fail: (263) [system] atom_concat($, _161402, ->)
^  Fail: (262) [user] symbol_concat($, _161402, ->)
^  Redo: (261) [user] subst_vars(->, _153944, [], _154884)
^  Unify: (261) [user] subst_vars(->, _153944, [], _154884)
   Call: (262) [system] compound(->)
^  Redo: (261) [user] subst_vars(->, _153944, [], _154884)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
^  Exit: (261) [user] subst_vars(->, ->, [], [])
^  Call: (261) [user] subst_vars(['Atom', 'Atom'], _153946, [], _150208)
^  Unify: (261) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
   Call: (262) [system] var(['Atom', 'Atom'])
^  Redo: (261) [user] subst_vars(['Atom', 'Atom'], _153946, [], _150208)
^  Unify: (261) [user] subst_vars(['Atom', 'Atom'], [_175402|_175404], [], _150208)
^  Call: (262) [user] subst_vars('Atom', _175402, [], _176342)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (263) [system] var('Atom')
^  Redo: (262) [user] subst_vars('Atom', _175402, [], _176342)
^  Unify: (262) [user] subst_vars('Atom', _175402, [], _176342)
   Call: (263) [system] atom('Atom')
   Exit: (263) [system] atom('Atom')
^  Call: (263) [user] symbol_concat($, _182860, 'Atom')
^  Unify: (263) [user] symbol_concat($, _182860, 'Atom')
   Call: (264) [system] atom_concat($, _182860, 'Atom')
   Fail: (264) [system] atom_concat($, _182860, 'Atom')
^  Fail: (263) [user] symbol_concat($, _182860, 'Atom')
^  Redo: (262) [user] subst_vars('Atom', _175402, [], _176342)
^  Unify: (262) [user] subst_vars('Atom', _175402, [], _176342)
   Call: (263) [system] compound('Atom')
^  Redo: (262) [user] subst_vars('Atom', _175402, [], _176342)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (262) [user] subst_vars(['Atom'], _175404, [], _150208)
^  Unify: (262) [user] subst_vars(['Atom'], ['Atom'], [], [])
   Call: (263) [system] var(['Atom'])
^  Redo: (262) [user] subst_vars(['Atom'], _175404, [], _150208)
^  Unify: (262) [user] subst_vars(['Atom'], [_196860|_196862], [], _150208)
^  Call: (263) [user] subst_vars('Atom', _196860, [], _197800)
^  Unify: (263) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (264) [system] var('Atom')
^  Redo: (263) [user] subst_vars('Atom', _196860, [], _197800)
^  Unify: (263) [user] subst_vars('Atom', _196860, [], _197800)
   Call: (264) [system] atom('Atom')
   Exit: (264) [system] atom('Atom')
^  Call: (264) [user] symbol_concat($, _204318, 'Atom')
^  Unify: (264) [user] symbol_concat($, _204318, 'Atom')
   Call: (265) [system] atom_concat($, _204318, 'Atom')
   Fail: (265) [system] atom_concat($, _204318, 'Atom')
^  Fail: (264) [user] symbol_concat($, _204318, 'Atom')
^  Redo: (263) [user] subst_vars('Atom', _196860, [], _197800)
^  Unify: (263) [user] subst_vars('Atom', _196860, [], _197800)
   Call: (264) [system] compound('Atom')
^  Redo: (263) [user] subst_vars('Atom', _196860, [], _197800)
^  Unify: (263) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (263) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (263) [user] subst_vars([], _196862, [], _150208)
^  Unify: (263) [user] subst_vars([], [], [], [])
   Call: (264) [system] var([])
^  Redo: (263) [user] subst_vars([], _196862, [], _150208)
^  Unify: (263) [user] subst_vars([], [], [], [])
^  Exit: (263) [user] subst_vars([], [], [], [])
^  Exit: (262) [user] subst_vars(['Atom'], ['Atom'], [], [])
^  Exit: (261) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
^  Exit: (260) [user] subst_vars([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'], [], [])
^  Call: (260) [user] subst_vars([], _149270, [], _102616)
^  Unify: (260) [user] subst_vars([], [], [], [])
   Call: (261) [system] var([])
^  Redo: (260) [user] subst_vars([], _149270, [], _102616)
^  Unify: (260) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([], [], [], [])
^  Exit: (259) [user] subst_vars([[->, 'Atom', 'Atom']], [[->, 'Atom', 'Atom']], [], [])
^  Exit: (258) [user] subst_vars([eval, [->, 'Atom', 'Atom']], [eval, [->, 'Atom', 'Atom']], [], [])
^  Exit: (257) [user] subst_vars([:, eval, [->, 'Atom', 'Atom']], [:, eval, [->, 'Atom', 'Atom']], [], [])
   Call: (257) [system] _231408=metta_file_buffer(+, [:, eval, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(134, 6, 27, 134))
   Exit: (257) [system] metta_file_buffer(+, [:, eval, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(134, 6, 27, 134))=metta_file_buffer(+, [:, eval, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(134, 6, 27, 134))
^  Call: (257) [user] assertz(metta_file_buffer(+, [:, eval, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(134, 6, 27, 134)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, [:, eval, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(134, 6, 27, 134)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, eval, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(134, 6, 27, 134))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, eval, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(134, 6, 27, 134))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, eval, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(134, 6, 27, 134))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, eval, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(134, 6, 27, 134))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
   Redo: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _282202)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _283140))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _283140)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 158)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _282202)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _282202)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_282202))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_282202))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_282202))
   Exit: (259) [system] nonvar(position(_282202))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(158, 7, 23, 158)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(158, 7, 23, 158))
   Call: (257) [user] current_read_mode(file, _302620)
   Unify: (257) [user] current_read_mode(file, _302620)
   Call: (258) [system] nb_current(file_mode, _302620)
   Redo: (257) [user] current_read_mode(file, _302620)
   Call: (258) [system] _302620=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _309070)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _309070)
^  Call: (258) [user] clause(t_l:s_reader_info(_309070), _311016, _310938)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _309070)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _309070)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _309070)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _309070)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _309070)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _309070)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _309070)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _309070)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _324846)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (260) [system] char_type('\n', space)
   Exit: (260) [system] char_type('\n', space)
   Call: (260) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (260) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _309070)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _309070)
   Call: (261) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _309070)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _309070)
   Call: (261) [system] peek_char((0x55aefe44e2f0), _335052)
   Exit: (261) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (261) [system] char_type('(', space)
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _309070)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _309070)
^  Call: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (262) [system] string((0x55aefe44e2f0))
^  Redo: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _309070)
^  Unify: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _309070)
^  Call: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _309070)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _309070)
   Call: (263) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _309070)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _309070)
   Call: (263) [system] peek_char((0x55aefe44e2f0), _350806)
   Exit: (263) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (263) [system] char_type('(', space)
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _309070)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _309070)
   Call: (263) [system] _355448=(0x55aefe44e2f0)
   Exit: (263) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (263) [user] once((read_position((0x55aefe44e2f0), _357316, _357318, _357320, _357322), read_sexpr((0x55aefe44e2f0), _357334), assertz(metta_file_comment(_357316, _357318, _357320, _357334, _357322))))
^  Unify: (263) [system] once(user:(read_position((0x55aefe44e2f0), _357316, _357318, _357320, _357322), read_sexpr((0x55aefe44e2f0), _357334), assertz(metta_file_comment(_357316, _357318, _357320, _357334, _357322))))
^  Call: (265) [user] read_position((0x55aefe44e2f0), _357316, _357318, _357320, _357322)
^  Unify: (265) [user] read_position((0x55aefe44e2f0), _357316, _357318, _357320, _357322)
   Call: (266) [system] stream_property((0x55aefe44e2f0), position(_357322))
   Unify: (266) [system] stream_property((0x55aefe44e2f0), position(_357322))
   Call: (267) [system] nonvar((0x55aefe44e2f0))
   Exit: (267) [system] nonvar((0x55aefe44e2f0))
   Call: (267) [system] nonvar(position(_357322))
   Exit: (267) [system] nonvar(position(_357322))
   Exit: (266) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(159, 8, 0, 159)))
   Call: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(159, 8, 0, 159), _357316)
   Unify: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(159, 8, 0, 159), _357316)
   Call: (267) [system] nonvar(line_count)
   Exit: (267) [system] nonvar(line_count)
   Call: (267) [$syspreds] stream_position_field(line_count, _371304)
   Unify: (267) [$syspreds] stream_position_field(line_count, 2)
   Exit: (267) [$syspreds] stream_position_field(line_count, 2)
   Call: (267) [system] arg(2, '$stream_position'(159, 8, 0, 159), _357316)
   Exit: (267) [system] arg(2, '$stream_position'(159, 8, 0, 159), 8)
   Exit: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(159, 8, 0, 159), 8)
   Call: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(159, 8, 0, 159), _357318)
   Unify: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(159, 8, 0, 159), _357318)
   Call: (267) [system] nonvar(line_position)
   Exit: (267) [system] nonvar(line_position)
   Call: (267) [$syspreds] stream_position_field(line_position, _380598)
   Unify: (267) [$syspreds] stream_position_field(line_position, 3)
   Exit: (267) [$syspreds] stream_position_field(line_position, 3)
   Call: (267) [system] arg(3, '$stream_position'(159, 8, 0, 159), _357318)
   Exit: (267) [system] arg(3, '$stream_position'(159, 8, 0, 159), 0)
   Exit: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(159, 8, 0, 159), 0)
   Call: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(159, 8, 0, 159), _357320)
   Unify: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(159, 8, 0, 159), _357320)
   Call: (267) [system] nonvar(char_count)
   Exit: (267) [system] nonvar(char_count)
   Call: (267) [$syspreds] stream_position_field(char_count, _389892)
   Unify: (267) [$syspreds] stream_position_field(char_count, 1)
   Exit: (267) [$syspreds] stream_position_field(char_count, 1)
   Call: (267) [system] arg(1, '$stream_position'(159, 8, 0, 159), _357320)
   Exit: (267) [system] arg(1, '$stream_position'(159, 8, 0, 159), 159)
   Exit: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(159, 8, 0, 159), 159)
^  Exit: (265) [user] read_position((0x55aefe44e2f0), 8, 0, 159, '$stream_position'(159, 8, 0, 159))
^  Call: (265) [user] read_sexpr((0x55aefe44e2f0), _357334)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _357334)
   Call: (266) [system] string((0x55aefe44e2f0))
^  Redo: (265) [user] read_sexpr((0x55aefe44e2f0), _357334)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _357334)
^  Call: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _357334)
^  Unify: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _357334)
^  Call: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _404762)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (268) [system] '('=(;)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', 'white')
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', end_of_line)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', space)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', cntrl)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (267) [system] get_char((0x55aefe44e2f0), _421546)
   Exit: (267) [system] get_char((0x55aefe44e2f0), '(')
   Call: (267) [system] '('='('
   Exit: (267) [system] '('='('
^  Call: (267) [user] read_list(')', (0x55aefe44e2f0), _357334)
^  Unify: (267) [user] read_list(')', (0x55aefe44e2f0), _357334)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _428972)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, 'white')
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, end_of_line)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, space)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _445756)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), :)
   Call: (268) [system] (:)=')'
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _357334)
   Call: (268) [system] (:)=end_of_file
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _357334)
^  Call: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _451334)
^  Unify: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _451334)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _455048)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, 'white')
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, end_of_line)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, space)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, cntrl)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] get_char((0x55aefe44e2f0), _471832)
   Exit: (269) [system] get_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)='('
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _451334)
   Call: (269) [system] (:)='['
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _451334)
   Call: (269) [system] (:)='{'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _451334)
   Call: (269) [system] (:)='"'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _451334)
   Call: (269) [system] (:)=!
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _451334)
   Call: (269) [system] (:)='\''
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _451334)
   Call: (269) [system] (:)='`'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _451334)
   Call: (269) [system] (:)=end_of_file
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _451334)
^  Call: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _451334)
^  Unify: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _451334)
^  Call: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _490442)
^  Unify: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _490442)
   Call: (271) [system] peek_char((0x55aefe44e2f0), _492308)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] is_delimiter(' ')
^  Unify: (271) [user] is_delimiter(' ')
   Call: (272) [system] char_type(' ', space)
   Exit: (272) [system] char_type(' ', space)
^  Exit: (271) [user] is_delimiter(' ')
   Call: (271) [system] _490442=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (270) [user] classify_and_convert_charseq(:, [], _451334)
^  Unify: (270) [user] classify_and_convert_charseq(:, [], _451334)
^  Call: (272) [system] setup_call_cleanup('$notrace'(_503474, _503476), once(user:catch(read_from_chars([:], _451334), _503450, fail)), '$restore_trace'(_503474, _503476))
^  Unify: (272) [system] setup_call_cleanup(system:'$notrace'(_503474, _503476), system:once(user:catch(read_from_chars([:], _451334), _503450, fail)), system:'$restore_trace'(_503474, _503476))
^  Call: (273) [system] sig_atomic(system:'$notrace'(_503474, _503476))
^  Exit: (272) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([:], :), _503450, fail)), system:'$restore_trace'(3, -1))
   Call: (271) [system] atomic(:)
   Exit: (271) [system] atomic(:)
^  Exit: (270) [user] classify_and_convert_charseq(:, [], :)
^  Exit: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, :)
^  Exit: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), :)
^  Call: (268) [user] read_list(')', (0x55aefe44e2f0), _511912)
^  Unify: (268) [user] read_list(')', (0x55aefe44e2f0), _511912)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _515626)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (270) [system] ' '=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(' ')
^  Unify: (270) [user] is_like_space(' ')
   Call: (271) [system] char_type(' ', 'white')
   Exit: (271) [system] char_type(' ', 'white')
^  Exit: (270) [user] is_like_space(' ')
   Call: (270) [system] get_char((0x55aefe44e2f0), _6412)
   Exit: (270) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _10040)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), c)
   Call: (271) [system] c=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, 'white')
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, end_of_line)
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, space)
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _27748)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), c)
   Call: (269) [system] c=')'
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _5982)
   Call: (269) [system] c=end_of_file
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _5982)
^  Call: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _33326)
^  Unify: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _33326)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _37040)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), c)
   Call: (271) [system] c=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, 'white')
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, end_of_line)
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, space)
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] get_char((0x55aefe44e2f0), _53824)
   Exit: (270) [system] get_char((0x55aefe44e2f0), c)
   Call: (270) [system] c='('
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _33326)
   Call: (270) [system] c='['
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _33326)
   Call: (270) [system] c='{'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _33326)
   Call: (270) [system] c='"'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _33326)
   Call: (270) [system] c=!
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _33326)
   Call: (270) [system] c='\''
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _33326)
   Call: (270) [system] c='`'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _33326)
   Call: (270) [system] c=end_of_file
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _33326)
^  Call: (270) [user] read_symbolic(')', (0x55aefe44e2f0), c, _33326)
^  Unify: (270) [user] read_symbolic(')', (0x55aefe44e2f0), c, _33326)
^  Call: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _72434)
^  Unify: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _72434)
   Call: (272) [system] peek_char((0x55aefe44e2f0), _74300)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), h)
^  Call: (272) [user] is_delimiter(h)
^  Unify: (272) [user] is_delimiter(h)
   Call: (273) [system] char_type(h, space)
^  Redo: (272) [user] is_delimiter(h)
   Call: (273) [system] arg(_79940, v('(', ')', end_of_file), h)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _72434)
   Call: (272) [system] ')'==h
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _72434)
   Call: (272) [system] get_char((0x55aefe44e2f0), h)
   Exit: (272) [system] get_char((0x55aefe44e2f0), h)
   Call: (272) [system] h=(\)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _72434)
^  Call: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _87306)
^  Unify: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _87306)
   Call: (273) [system] peek_char((0x55aefe44e2f0), _89172)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (273) [user] is_delimiter(a)
^  Unify: (273) [user] is_delimiter(a)
   Call: (274) [system] char_type(a, space)
^  Redo: (273) [user] is_delimiter(a)
   Call: (274) [system] arg(_94812, v('(', ')', end_of_file), a)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _87306)
   Call: (273) [system] ')'==a
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _87306)
   Call: (273) [system] get_char((0x55aefe44e2f0), a)
   Exit: (273) [system] get_char((0x55aefe44e2f0), a)
   Call: (273) [system] a=(\)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _87306)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _102178)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _102178)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _104044)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (274) [user] is_delimiter(i)
^  Unify: (274) [user] is_delimiter(i)
   Call: (275) [system] char_type(i, space)
^  Redo: (274) [user] is_delimiter(i)
   Call: (275) [system] arg(_109684, v('(', ')', end_of_file), i)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _102178)
   Call: (274) [system] ')'==i
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _102178)
   Call: (274) [system] get_char((0x55aefe44e2f0), i)
   Exit: (274) [system] get_char((0x55aefe44e2f0), i)
   Call: (274) [system] i=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _102178)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _117050)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _117050)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _118916)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (275) [user] is_delimiter(n)
^  Unify: (275) [user] is_delimiter(n)
   Call: (276) [system] char_type(n, space)
^  Redo: (275) [user] is_delimiter(n)
   Call: (276) [system] arg(_124556, v('(', ')', end_of_file), n)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _117050)
   Call: (275) [system] ')'==n
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _117050)
   Call: (275) [system] get_char((0x55aefe44e2f0), n)
   Exit: (275) [system] get_char((0x55aefe44e2f0), n)
   Call: (275) [system] n=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _117050)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _131922)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _131922)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _133788)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] is_delimiter(' ')
^  Unify: (276) [user] is_delimiter(' ')
   Call: (277) [system] char_type(' ', space)
   Exit: (277) [system] char_type(' ', space)
^  Exit: (276) [user] is_delimiter(' ')
   Call: (276) [system] _131922=[]
   Exit: (276) [system] []=[]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (275) [system] _117050=[n]
   Exit: (275) [system] [n]=[n]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (274) [system] _102178=[i, n]
   Exit: (274) [system] [i, n]=[i, n]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, n])
   Call: (273) [system] _87306=[a, i, n]
   Exit: (273) [system] [a, i, n]=[a, i, n]
^  Exit: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, i, n])
   Call: (272) [system] _72434=[h, a, i, n]
   Exit: (272) [system] [h, a, i, n]=[h, a, i, n]
^  Exit: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [h, a, i, n])
^  Call: (271) [user] classify_and_convert_charseq(c, [h, a, i, n], _33326)
^  Unify: (271) [user] classify_and_convert_charseq(c, [h, a, i, n], _33326)
^  Call: (273) [system] setup_call_cleanup('$notrace'(_156130, _156132), once(user:catch(read_from_chars([c, h, a, i, n], _33326), _156106, fail)), '$restore_trace'(_156130, _156132))
^  Unify: (273) [system] setup_call_cleanup(system:'$notrace'(_156130, _156132), system:once(user:catch(read_from_chars([c, h, a, i, n], _33326), _156106, fail)), system:'$restore_trace'(_156130, _156132))
^  Call: (274) [system] sig_atomic(system:'$notrace'(_156130, _156132))
^  Exit: (273) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([c, h, a, i, n], chain), _156106, fail)), system:'$restore_trace'(3, -1))
   Call: (272) [system] atomic(chain)
   Exit: (272) [system] atomic(chain)
^  Exit: (271) [user] classify_and_convert_charseq(c, [h, a, i, n], chain)
^  Exit: (270) [user] read_symbolic(')', (0x55aefe44e2f0), c, chain)
^  Exit: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), chain)
^  Call: (269) [user] read_list(')', (0x55aefe44e2f0), _164568)
^  Unify: (269) [user] read_list(')', (0x55aefe44e2f0), _164568)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _168282)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (271) [system] ' '=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(' ')
^  Unify: (271) [user] is_like_space(' ')
   Call: (272) [system] char_type(' ', 'white')
   Exit: (272) [system] char_type(' ', 'white')
^  Exit: (271) [user] is_like_space(' ')
   Call: (271) [system] get_char((0x55aefe44e2f0), _176940)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _180568)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _198276)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (270) [system] '('=')'
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _164568)
   Call: (270) [system] '('=end_of_file
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _164568)
^  Call: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _203854)
^  Unify: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _203854)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _207568)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] get_char((0x55aefe44e2f0), _224352)
   Exit: (271) [system] get_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('='('
   Exit: (271) [system] '('='('
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _203854)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _203854)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _231778)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, 'white')
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, end_of_line)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, space)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _248562)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), -)
   Call: (272) [system] (-)=')'
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _203854)
   Call: (272) [system] (-)=end_of_file
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _203854)
^  Call: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _254140)
^  Unify: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _254140)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _257854)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, 'white')
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, end_of_line)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, space)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] get_char((0x55aefe44e2f0), _274638)
   Exit: (273) [system] get_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)='('
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _254140)
   Call: (273) [system] (-)='['
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _254140)
   Call: (273) [system] (-)='{'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _254140)
   Call: (273) [system] (-)='"'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _254140)
   Call: (273) [system] (-)=!
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _254140)
   Call: (273) [system] (-)='\''
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _254140)
   Call: (273) [system] (-)='`'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _254140)
   Call: (273) [system] (-)=end_of_file
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _254140)
^  Call: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _254140)
^  Unify: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _254140)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _293248)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _293248)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _295114)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), >)
^  Call: (275) [user] is_delimiter(>)
^  Unify: (275) [user] is_delimiter(>)
   Call: (276) [system] char_type(>, space)
^  Redo: (275) [user] is_delimiter(>)
   Call: (276) [system] arg(_300754, v('(', ')', end_of_file), >)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _293248)
   Call: (275) [system] ')'==(>)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _293248)
   Call: (275) [system] get_char((0x55aefe44e2f0), >)
   Exit: (275) [system] get_char((0x55aefe44e2f0), >)
   Call: (275) [system] (>)=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _293248)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _308120)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _308120)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _309986)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] is_delimiter(' ')
^  Unify: (276) [user] is_delimiter(' ')
   Call: (277) [system] char_type(' ', space)
   Exit: (277) [system] char_type(' ', space)
^  Exit: (276) [user] is_delimiter(' ')
   Call: (276) [system] _308120=[]
   Exit: (276) [system] []=[]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (275) [system] _293248=[>]
   Exit: (275) [system] [>]=[>]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [>])
^  Call: (274) [user] classify_and_convert_charseq(-, [>], _254140)
^  Unify: (274) [user] classify_and_convert_charseq(-, [>], _254140)
^  Call: (276) [system] setup_call_cleanup('$notrace'(_323946, _323948), once(user:catch(read_from_chars([-, >], _254140), _323922, fail)), '$restore_trace'(_323946, _323948))
^  Unify: (276) [system] setup_call_cleanup(system:'$notrace'(_323946, _323948), system:once(user:catch(read_from_chars([-, >], _254140), _323922, fail)), system:'$restore_trace'(_323946, _323948))
^  Call: (277) [system] sig_atomic(system:'$notrace'(_323946, _323948))
^  Exit: (276) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([-, >], ->), _323922, fail)), system:'$restore_trace'(3, -1))
   Call: (275) [system] atomic(->)
   Exit: (275) [system] atomic(->)
^  Exit: (274) [user] classify_and_convert_charseq(-, [>], ->)
^  Exit: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, ->)
^  Exit: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), ->)
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _332384)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _332384)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _336098)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (274) [system] ' '=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(' ')
^  Unify: (274) [user] is_like_space(' ')
   Call: (275) [system] char_type(' ', 'white')
   Exit: (275) [system] char_type(' ', 'white')
^  Exit: (274) [user] is_like_space(' ')
   Call: (274) [system] get_char((0x55aefe44e2f0), _344756)
   Exit: (274) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _348384)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', 'white')
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', end_of_line)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', space)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _366092)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (273) [system] 'A'=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _332384)
   Call: (273) [system] 'A'=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _332384)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _371670)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _371670)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _375384)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', 'white')
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', end_of_line)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', space)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _392168)
   Exit: (274) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (274) [system] 'A'='('
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _371670)
   Call: (274) [system] 'A'='['
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _371670)
   Call: (274) [system] 'A'='{'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _371670)
   Call: (274) [system] 'A'='"'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _371670)
   Call: (274) [system] 'A'=!
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _371670)
   Call: (274) [system] 'A'='\''
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _371670)
   Call: (274) [system] 'A'='`'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _371670)
   Call: (274) [system] 'A'=end_of_file
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _371670)
^  Call: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _371670)
^  Unify: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _371670)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _410778)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _410778)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _412644)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (276) [user] is_delimiter(t)
^  Unify: (276) [user] is_delimiter(t)
   Call: (277) [system] char_type(t, space)
^  Redo: (276) [user] is_delimiter(t)
   Call: (277) [system] arg(_418284, v('(', ')', end_of_file), t)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _410778)
   Call: (276) [system] ')'==t
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _410778)
   Call: (276) [system] get_char((0x55aefe44e2f0), t)
   Exit: (276) [system] get_char((0x55aefe44e2f0), t)
   Call: (276) [system] t=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _410778)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _425650)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _425650)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _427516)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (277) [user] is_delimiter(o)
^  Unify: (277) [user] is_delimiter(o)
   Call: (278) [system] char_type(o, space)
^  Redo: (277) [user] is_delimiter(o)
   Call: (278) [system] arg(_433156, v('(', ')', end_of_file), o)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _425650)
   Call: (277) [system] ')'==o
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _425650)
   Call: (277) [system] get_char((0x55aefe44e2f0), o)
   Exit: (277) [system] get_char((0x55aefe44e2f0), o)
   Call: (277) [system] o=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _425650)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _440522)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _440522)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _442388)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (278) [user] is_delimiter(m)
^  Unify: (278) [user] is_delimiter(m)
   Call: (279) [system] char_type(m, space)
^  Redo: (278) [user] is_delimiter(m)
   Call: (279) [system] arg(_448028, v('(', ')', end_of_file), m)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _440522)
   Call: (278) [system] ')'==m
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _440522)
   Call: (278) [system] get_char((0x55aefe44e2f0), m)
   Exit: (278) [system] get_char((0x55aefe44e2f0), m)
   Call: (278) [system] m=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _440522)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _455394)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _455394)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _457260)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (279) [user] is_delimiter(' ')
^  Unify: (279) [user] is_delimiter(' ')
   Call: (280) [system] char_type(' ', space)
   Exit: (280) [system] char_type(' ', space)
^  Exit: (279) [user] is_delimiter(' ')
   Call: (279) [system] _455394=[]
   Exit: (279) [system] []=[]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (278) [system] _440522=[m]
   Exit: (278) [system] [m]=[m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (277) [system] _425650=[o, m]
   Exit: (277) [system] [o, m]=[o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (276) [system] _410778=[t, o, m]
   Exit: (276) [system] [t, o, m]=[t, o, m]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (275) [user] classify_and_convert_charseq('A', [t, o, m], _371670)
^  Unify: (275) [user] classify_and_convert_charseq('A', [t, o, m], _371670)
^  Call: (277) [system] setup_call_cleanup('$notrace'(_476808, _476810), once(user:catch(read_from_chars(['A', t, o, m], _371670), _476784, fail)), '$restore_trace'(_476808, _476810))
^  Unify: (277) [system] setup_call_cleanup(system:'$notrace'(_476808, _476810), system:once(user:catch(read_from_chars(['A', t, o, m], _371670), _476784, fail)), system:'$restore_trace'(_476808, _476810))
^  Call: (278) [system] sig_atomic(system:'$notrace'(_476808, _476810))
^  Exit: (277) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _371670), _476784, fail)), system:'$restore_trace'(3, -1))
   Call: (276) [system] atomic(_371670)
^  Redo: (275) [user] classify_and_convert_charseq('A', [t, o, m], _371670)
^  Unify: (275) [user] classify_and_convert_charseq('A', [t, o, m], _371670)
   Call: (276) [system] atom_chars(_371670, ['A', t, o, m])
   Exit: (276) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (275) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (273) [user] read_list(')', (0x55aefe44e2f0), _488062)
^  Unify: (273) [user] read_list(')', (0x55aefe44e2f0), _488062)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _491776)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (275) [system] ' '=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(' ')
^  Unify: (275) [user] is_like_space(' ')
   Call: (276) [system] char_type(' ', 'white')
   Exit: (276) [system] char_type(' ', 'white')
^  Exit: (275) [user] is_like_space(' ')
   Call: (275) [system] get_char((0x55aefe44e2f0), _500434)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _504062)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'V')
   Call: (276) [system] 'V'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('V')
^  Unify: (276) [user] is_like_space('V')
   Call: (277) [system] char_type('V', 'white')
^  Redo: (276) [user] is_like_space('V')
^  Unify: (276) [user] is_like_space('V')
   Call: (277) [system] char_type('V', end_of_line)
^  Redo: (276) [user] is_like_space('V')
^  Unify: (276) [user] is_like_space('V')
   Call: (277) [system] char_type('V', space)
^  Redo: (276) [user] is_like_space('V')
^  Unify: (276) [user] is_like_space('V')
   Call: (277) [system] char_type('V', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _521770)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), 'V')
   Call: (274) [system] 'V'=')'
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _6006)
   Call: (274) [system] 'V'=end_of_file
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _6006)
^  Call: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _9424)
^  Unify: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _9424)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _13138)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'V')
   Call: (276) [system] 'V'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('V')
^  Unify: (276) [user] is_like_space('V')
   Call: (277) [system] char_type('V', 'white')
^  Redo: (276) [user] is_like_space('V')
^  Unify: (276) [user] is_like_space('V')
   Call: (277) [system] char_type('V', end_of_line)
^  Redo: (276) [user] is_like_space('V')
^  Unify: (276) [user] is_like_space('V')
   Call: (277) [system] char_type('V', space)
^  Redo: (276) [user] is_like_space('V')
^  Unify: (276) [user] is_like_space('V')
   Call: (277) [system] char_type('V', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] get_char((0x55aefe44e2f0), _29922)
   Exit: (275) [system] get_char((0x55aefe44e2f0), 'V')
   Call: (275) [system] 'V'='('
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _9424)
   Call: (275) [system] 'V'='['
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _9424)
   Call: (275) [system] 'V'='{'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _9424)
   Call: (275) [system] 'V'='"'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _9424)
   Call: (275) [system] 'V'=!
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _9424)
   Call: (275) [system] 'V'='\''
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _9424)
   Call: (275) [system] 'V'='`'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _9424)
   Call: (275) [system] 'V'=end_of_file
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _9424)
^  Call: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'V', _9424)
^  Unify: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'V', _9424)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _48532)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _48532)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _50398)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (277) [user] is_delimiter(a)
^  Unify: (277) [user] is_delimiter(a)
   Call: (278) [system] char_type(a, space)
^  Redo: (277) [user] is_delimiter(a)
   Call: (278) [system] arg(_56038, v('(', ')', end_of_file), a)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _48532)
   Call: (277) [system] ')'==a
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _48532)
   Call: (277) [system] get_char((0x55aefe44e2f0), a)
   Exit: (277) [system] get_char((0x55aefe44e2f0), a)
   Call: (277) [system] a=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _48532)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _63404)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _63404)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _65270)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (278) [user] is_delimiter(r)
^  Unify: (278) [user] is_delimiter(r)
   Call: (279) [system] char_type(r, space)
^  Redo: (278) [user] is_delimiter(r)
   Call: (279) [system] arg(_70910, v('(', ')', end_of_file), r)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _63404)
   Call: (278) [system] ')'==r
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _63404)
   Call: (278) [system] get_char((0x55aefe44e2f0), r)
   Exit: (278) [system] get_char((0x55aefe44e2f0), r)
   Call: (278) [system] r=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _63404)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _78276)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _78276)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _80142)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (279) [user] is_delimiter(i)
^  Unify: (279) [user] is_delimiter(i)
   Call: (280) [system] char_type(i, space)
^  Redo: (279) [user] is_delimiter(i)
   Call: (280) [system] arg(_85782, v('(', ')', end_of_file), i)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _78276)
   Call: (279) [system] ')'==i
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _78276)
   Call: (279) [system] get_char((0x55aefe44e2f0), i)
   Exit: (279) [system] get_char((0x55aefe44e2f0), i)
   Call: (279) [system] i=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _78276)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _93148)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _93148)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _95014)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (280) [user] is_delimiter(a)
^  Unify: (280) [user] is_delimiter(a)
   Call: (281) [system] char_type(a, space)
^  Redo: (280) [user] is_delimiter(a)
   Call: (281) [system] arg(_100654, v('(', ')', end_of_file), a)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _93148)
   Call: (280) [system] ')'==a
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _93148)
   Call: (280) [system] get_char((0x55aefe44e2f0), a)
   Exit: (280) [system] get_char((0x55aefe44e2f0), a)
   Call: (280) [system] a=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _93148)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _108020)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _108020)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _109886)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), b)
^  Call: (281) [user] is_delimiter(b)
^  Unify: (281) [user] is_delimiter(b)
   Call: (282) [system] char_type(b, space)
^  Redo: (281) [user] is_delimiter(b)
   Call: (282) [system] arg(_115526, v('(', ')', end_of_file), b)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _108020)
   Call: (281) [system] ')'==b
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _108020)
   Call: (281) [system] get_char((0x55aefe44e2f0), b)
   Exit: (281) [system] get_char((0x55aefe44e2f0), b)
   Call: (281) [system] b=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _108020)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _122892)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _122892)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _124758)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (282) [user] is_delimiter(l)
^  Unify: (282) [user] is_delimiter(l)
   Call: (283) [system] char_type(l, space)
^  Redo: (282) [user] is_delimiter(l)
   Call: (283) [system] arg(_130398, v('(', ')', end_of_file), l)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _122892)
   Call: (282) [system] ')'==l
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _122892)
   Call: (282) [system] get_char((0x55aefe44e2f0), l)
   Exit: (282) [system] get_char((0x55aefe44e2f0), l)
   Call: (282) [system] l=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _122892)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137764)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137764)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _139630)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (283) [user] is_delimiter(e)
^  Unify: (283) [user] is_delimiter(e)
   Call: (284) [system] char_type(e, space)
^  Redo: (283) [user] is_delimiter(e)
   Call: (284) [system] arg(_145270, v('(', ')', end_of_file), e)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137764)
   Call: (283) [system] ')'==e
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137764)
   Call: (283) [system] get_char((0x55aefe44e2f0), e)
   Exit: (283) [system] get_char((0x55aefe44e2f0), e)
   Call: (283) [system] e=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137764)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152636)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152636)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _154502)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (284) [user] is_delimiter(' ')
^  Unify: (284) [user] is_delimiter(' ')
   Call: (285) [system] char_type(' ', space)
   Exit: (285) [system] char_type(' ', space)
^  Exit: (284) [user] is_delimiter(' ')
   Call: (284) [system] _152636=[]
   Exit: (284) [system] []=[]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (283) [system] _137764=[e]
   Exit: (283) [system] [e]=[e]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e])
   Call: (282) [system] _122892=[l, e]
   Exit: (282) [system] [l, e]=[l, e]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l, e])
   Call: (281) [system] _108020=[b, l, e]
   Exit: (281) [system] [b, l, e]=[b, l, e]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [b, l, e])
   Call: (280) [system] _93148=[a, b, l, e]
   Exit: (280) [system] [a, b, l, e]=[a, b, l, e]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, b, l, e])
   Call: (279) [system] _78276=[i, a, b, l, e]
   Exit: (279) [system] [i, a, b, l, e]=[i, a, b, l, e]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, a, b, l, e])
   Call: (278) [system] _63404=[r, i, a, b, l, e]
   Exit: (278) [system] [r, i, a, b, l, e]=[r, i, a, b, l, e]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, i, a, b, l, e])
   Call: (277) [system] _48532=[a, r, i, a, b, l, e]
   Exit: (277) [system] [a, r, i, a, b, l, e]=[a, r, i, a, b, l, e]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, r, i, a, b, l, e])
^  Call: (276) [user] classify_and_convert_charseq('V', [a, r, i, a, b, l, e], _9424)
^  Unify: (276) [user] classify_and_convert_charseq('V', [a, r, i, a, b, l, e], _9424)
^  Call: (278) [system] setup_call_cleanup('$notrace'(_185226, _185228), once(user:catch(read_from_chars(['V', a, r, i, a, b, l, e], _9424), _185202, fail)), '$restore_trace'(_185226, _185228))
^  Unify: (278) [system] setup_call_cleanup(system:'$notrace'(_185226, _185228), system:once(user:catch(read_from_chars(['V', a, r, i, a, b, l, e], _9424), _185202, fail)), system:'$restore_trace'(_185226, _185228))
^  Call: (279) [system] sig_atomic(system:'$notrace'(_185226, _185228))
^  Exit: (278) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['V', a, r, i, a, b, l, e], _9424), _185202, fail)), system:'$restore_trace'(3, -1))
   Call: (277) [system] atomic(_9424)
^  Redo: (276) [user] classify_and_convert_charseq('V', [a, r, i, a, b, l, e], _9424)
^  Unify: (276) [user] classify_and_convert_charseq('V', [a, r, i, a, b, l, e], _9424)
   Call: (277) [system] atom_chars(_9424, ['V', a, r, i, a, b, l, e])
   Exit: (277) [system] atom_chars('Variable', ['V', a, r, i, a, b, l, e])
^  Exit: (276) [user] classify_and_convert_charseq('V', [a, r, i, a, b, l, e], 'Variable')
^  Exit: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'V', 'Variable')
^  Exit: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Variable')
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _196480)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _196480)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _200194)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (276) [system] ' '=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(' ')
^  Unify: (276) [user] is_like_space(' ')
   Call: (277) [system] char_type(' ', 'white')
   Exit: (277) [system] char_type(' ', 'white')
^  Exit: (276) [user] is_like_space(' ')
   Call: (276) [system] get_char((0x55aefe44e2f0), _208852)
   Exit: (276) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _212480)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (277) [system] 'A'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', 'white')
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', end_of_line)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', space)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _230188)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=')'
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _196480)
   Call: (275) [system] 'A'=end_of_file
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _196480)
^  Call: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _235766)
^  Unify: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _235766)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _239480)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (277) [system] 'A'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', 'white')
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', end_of_line)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', space)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] get_char((0x55aefe44e2f0), _256264)
   Exit: (276) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'='('
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _235766)
   Call: (276) [system] 'A'='['
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _235766)
   Call: (276) [system] 'A'='{'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _235766)
   Call: (276) [system] 'A'='"'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _235766)
   Call: (276) [system] 'A'=!
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _235766)
   Call: (276) [system] 'A'='\''
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _235766)
   Call: (276) [system] 'A'='`'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _235766)
   Call: (276) [system] 'A'=end_of_file
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _235766)
^  Call: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _235766)
^  Unify: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _235766)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _274874)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _274874)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _276740)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (278) [user] is_delimiter(t)
^  Unify: (278) [user] is_delimiter(t)
   Call: (279) [system] char_type(t, space)
^  Redo: (278) [user] is_delimiter(t)
   Call: (279) [system] arg(_282380, v('(', ')', end_of_file), t)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _274874)
   Call: (278) [system] ')'==t
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _274874)
   Call: (278) [system] get_char((0x55aefe44e2f0), t)
   Exit: (278) [system] get_char((0x55aefe44e2f0), t)
   Call: (278) [system] t=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _274874)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _289746)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _289746)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _291612)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (279) [user] is_delimiter(o)
^  Unify: (279) [user] is_delimiter(o)
   Call: (280) [system] char_type(o, space)
^  Redo: (279) [user] is_delimiter(o)
   Call: (280) [system] arg(_297252, v('(', ')', end_of_file), o)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _289746)
   Call: (279) [system] ')'==o
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _289746)
   Call: (279) [system] get_char((0x55aefe44e2f0), o)
   Exit: (279) [system] get_char((0x55aefe44e2f0), o)
   Call: (279) [system] o=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _289746)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _304618)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _304618)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _306484)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (280) [user] is_delimiter(m)
^  Unify: (280) [user] is_delimiter(m)
   Call: (281) [system] char_type(m, space)
^  Redo: (280) [user] is_delimiter(m)
   Call: (281) [system] arg(_312124, v('(', ')', end_of_file), m)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _304618)
   Call: (280) [system] ')'==m
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _304618)
   Call: (280) [system] get_char((0x55aefe44e2f0), m)
   Exit: (280) [system] get_char((0x55aefe44e2f0), m)
   Call: (280) [system] m=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _304618)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _319490)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _319490)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _321356)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (281) [user] is_delimiter(' ')
^  Unify: (281) [user] is_delimiter(' ')
   Call: (282) [system] char_type(' ', space)
   Exit: (282) [system] char_type(' ', space)
^  Exit: (281) [user] is_delimiter(' ')
   Call: (281) [system] _319490=[]
   Exit: (281) [system] []=[]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (280) [system] _304618=[m]
   Exit: (280) [system] [m]=[m]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (279) [system] _289746=[o, m]
   Exit: (279) [system] [o, m]=[o, m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (278) [system] _274874=[t, o, m]
   Exit: (278) [system] [t, o, m]=[t, o, m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (277) [user] classify_and_convert_charseq('A', [t, o, m], _235766)
^  Unify: (277) [user] classify_and_convert_charseq('A', [t, o, m], _235766)
^  Call: (279) [system] setup_call_cleanup('$notrace'(_340904, _340906), once(user:catch(read_from_chars(['A', t, o, m], _235766), _340880, fail)), '$restore_trace'(_340904, _340906))
^  Unify: (279) [system] setup_call_cleanup(system:'$notrace'(_340904, _340906), system:once(user:catch(read_from_chars(['A', t, o, m], _235766), _340880, fail)), system:'$restore_trace'(_340904, _340906))
^  Call: (280) [system] sig_atomic(system:'$notrace'(_340904, _340906))
^  Exit: (279) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _235766), _340880, fail)), system:'$restore_trace'(3, -1))
   Call: (278) [system] atomic(_235766)
^  Redo: (277) [user] classify_and_convert_charseq('A', [t, o, m], _235766)
^  Unify: (277) [user] classify_and_convert_charseq('A', [t, o, m], _235766)
   Call: (278) [system] atom_chars(_235766, ['A', t, o, m])
   Exit: (278) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (277) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (275) [user] read_list(')', (0x55aefe44e2f0), _352158)
^  Unify: (275) [user] read_list(')', (0x55aefe44e2f0), _352158)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _355872)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (277) [system] ' '=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space(' ')
^  Unify: (277) [user] is_like_space(' ')
   Call: (278) [system] char_type(' ', 'white')
   Exit: (278) [system] char_type(' ', 'white')
^  Exit: (277) [user] is_like_space(' ')
   Call: (277) [system] get_char((0x55aefe44e2f0), _364530)
   Exit: (277) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _368158)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (278) [system] 'A'=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', 'white')
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', end_of_line)
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', space)
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', cntrl)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _385866)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=')'
^  Redo: (275) [user] read_list(')', (0x55aefe44e2f0), _352158)
   Call: (276) [system] 'A'=end_of_file
^  Redo: (275) [user] read_list(')', (0x55aefe44e2f0), _352158)
^  Call: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _391444)
^  Unify: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _391444)
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _395158)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (278) [system] 'A'=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', 'white')
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', end_of_line)
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', space)
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', cntrl)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] get_char((0x55aefe44e2f0), _411942)
   Exit: (277) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (277) [system] 'A'='('
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _391444)
   Call: (277) [system] 'A'='['
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _391444)
   Call: (277) [system] 'A'='{'
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _391444)
   Call: (277) [system] 'A'='"'
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _391444)
   Call: (277) [system] 'A'=!
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _391444)
   Call: (277) [system] 'A'='\''
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _391444)
   Call: (277) [system] 'A'='`'
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _391444)
   Call: (277) [system] 'A'=end_of_file
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _391444)
^  Call: (277) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _391444)
^  Unify: (277) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _391444)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430552)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430552)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _432418)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (279) [user] is_delimiter(t)
^  Unify: (279) [user] is_delimiter(t)
   Call: (280) [system] char_type(t, space)
^  Redo: (279) [user] is_delimiter(t)
   Call: (280) [system] arg(_438058, v('(', ')', end_of_file), t)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430552)
   Call: (279) [system] ')'==t
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430552)
   Call: (279) [system] get_char((0x55aefe44e2f0), t)
   Exit: (279) [system] get_char((0x55aefe44e2f0), t)
   Call: (279) [system] t=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430552)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445424)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445424)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _447290)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (280) [user] is_delimiter(o)
^  Unify: (280) [user] is_delimiter(o)
   Call: (281) [system] char_type(o, space)
^  Redo: (280) [user] is_delimiter(o)
   Call: (281) [system] arg(_452930, v('(', ')', end_of_file), o)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445424)
   Call: (280) [system] ')'==o
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445424)
   Call: (280) [system] get_char((0x55aefe44e2f0), o)
   Exit: (280) [system] get_char((0x55aefe44e2f0), o)
   Call: (280) [system] o=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445424)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _460296)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _460296)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _462162)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (281) [user] is_delimiter(m)
^  Unify: (281) [user] is_delimiter(m)
   Call: (282) [system] char_type(m, space)
^  Redo: (281) [user] is_delimiter(m)
   Call: (282) [system] arg(_467802, v('(', ')', end_of_file), m)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _460296)
   Call: (281) [system] ')'==m
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _460296)
   Call: (281) [system] get_char((0x55aefe44e2f0), m)
   Exit: (281) [system] get_char((0x55aefe44e2f0), m)
   Call: (281) [system] m=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _460296)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _475168)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _475168)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _477034)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (282) [user] is_delimiter(')')
^  Unify: (282) [user] is_delimiter(')')
   Call: (283) [system] char_type(')', space)
^  Redo: (282) [user] is_delimiter(')')
   Call: (283) [system] arg(_482674, v('(', ')', end_of_file), ')')
   Exit: (283) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (282) [user] is_delimiter(')')
   Call: (282) [system] _475168=[]
   Exit: (282) [system] []=[]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (281) [system] _460296=[m]
   Exit: (281) [system] [m]=[m]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (280) [system] _445424=[o, m]
   Exit: (280) [system] [o, m]=[o, m]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (279) [system] _430552=[t, o, m]
   Exit: (279) [system] [t, o, m]=[t, o, m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (278) [user] classify_and_convert_charseq('A', [t, o, m], _391444)
^  Unify: (278) [user] classify_and_convert_charseq('A', [t, o, m], _391444)
^  Call: (280) [system] setup_call_cleanup('$notrace'(_498450, _498452), once(user:catch(read_from_chars(['A', t, o, m], _391444), _498426, fail)), '$restore_trace'(_498450, _498452))
^  Unify: (280) [system] setup_call_cleanup(system:'$notrace'(_498450, _498452), system:once(user:catch(read_from_chars(['A', t, o, m], _391444), _498426, fail)), system:'$restore_trace'(_498450, _498452))
^  Call: (281) [system] sig_atomic(system:'$notrace'(_498450, _498452))
^  Exit: (280) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _391444), _498426, fail)), system:'$restore_trace'(3, -1))
   Call: (279) [system] atomic(_391444)
^  Redo: (278) [user] classify_and_convert_charseq('A', [t, o, m], _391444)
^  Unify: (278) [user] classify_and_convert_charseq('A', [t, o, m], _391444)
   Call: (279) [system] atom_chars(_391444, ['A', t, o, m])
   Exit: (279) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (278) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (277) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (276) [user] read_list(')', (0x55aefe44e2f0), _509704)
^  Unify: (276) [user] read_list(')', (0x55aefe44e2f0), _509704)
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _513418)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (278) [system] ')'=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space(')')
^  Unify: (278) [user] is_like_space(')')
   Call: (279) [system] char_type(')', 'white')
^  Redo: (278) [user] is_like_space(')')
^  Unify: (278) [user] is_like_space(')')
   Call: (279) [system] char_type(')', end_of_line)
^  Redo: (278) [user] is_like_space(')')
^  Unify: (278) [user] is_like_space(')')
   Call: (279) [system] char_type(')', space)
^  Redo: (278) [user] is_like_space(')')
^  Unify: (278) [user] is_like_space(')')
   Call: (279) [system] char_type(')', cntrl)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _12288)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (277) [system] ')'=')'
   Exit: (277) [system] ')'=')'
   Call: (277) [system] get_char((0x55aefe44e2f0), _16078)
   Exit: (277) [system] get_char((0x55aefe44e2f0), ')')
   Call: (277) [system] _6024=[]
   Exit: (277) [system] []=[]
^  Exit: (276) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (276) [system] _6018=['Atom']
   Exit: (276) [system] ['Atom']=['Atom']
^  Exit: (275) [user] read_list(')', (0x55aefe44e2f0), ['Atom'])
   Call: (275) [system] _6012=['Atom', 'Atom']
   Exit: (275) [system] ['Atom', 'Atom']=['Atom', 'Atom']
^  Exit: (274) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Atom'])
   Call: (274) [system] _6006=['Variable', 'Atom', 'Atom']
   Exit: (274) [system] ['Variable', 'Atom', 'Atom']=['Variable', 'Atom', 'Atom']
^  Exit: (273) [user] read_list(')', (0x55aefe44e2f0), ['Variable', 'Atom', 'Atom'])
   Call: (273) [system] _6000=['Atom', 'Variable', 'Atom', 'Atom']
   Exit: (273) [system] ['Atom', 'Variable', 'Atom', 'Atom']=['Atom', 'Variable', 'Atom', 'Atom']
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Variable', 'Atom', 'Atom'])
   Call: (272) [system] _5992=[->, 'Atom', 'Variable', 'Atom', 'Atom']
   Exit: (272) [system] [->, 'Atom', 'Variable', 'Atom', 'Atom']=[->, 'Atom', 'Variable', 'Atom', 'Atom']
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [->, 'Atom', 'Variable', 'Atom', 'Atom'])
^  Exit: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), [->, 'Atom', 'Variable', 'Atom', 'Atom'])
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _35548)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _35548)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _39262)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (272) [system] ')'=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', 'white')
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', end_of_line)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', space)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _56046)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (271) [system] ')'=')'
   Exit: (271) [system] ')'=')'
   Call: (271) [system] get_char((0x55aefe44e2f0), _59836)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ')')
   Call: (271) [system] _35548=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (270) [system] _5988=[[->, 'Atom', 'Variable', 'Atom', 'Atom']]
   Exit: (270) [system] [[->, 'Atom', 'Variable', 'Atom', 'Atom']]=[[->, 'Atom', 'Variable', 'Atom', 'Atom']]
^  Exit: (269) [user] read_list(')', (0x55aefe44e2f0), [[->, 'Atom', 'Variable', 'Atom', 'Atom']])
   Call: (269) [system] _5982=[chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]
   Exit: (269) [system] [chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]=[chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]
^  Exit: (268) [user] read_list(')', (0x55aefe44e2f0), [chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
   Call: (268) [system] _5942=[:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]
   Exit: (268) [system] [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]=[:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]
^  Exit: (267) [user] read_list(')', (0x55aefe44e2f0), [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (265) [user] read_sexpr((0x55aefe44e2f0), [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Call: (265) [user] assertz(metta_file_comment(8, 0, 159, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], '$stream_position'(159, 8, 0, 159)))
^  Exit: (265) [user] assertz(metta_file_comment(8, 0, 159, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], '$stream_position'(159, 8, 0, 159)))
^  Exit: (263) [system] once(user:(read_position((0x55aefe44e2f0), 8, 0, 159, '$stream_position'(159, 8, 0, 159)), read_sexpr((0x55aefe44e2f0), [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]), assertz(metta_file_comment(8, 0, 159, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], '$stream_position'(159, 8, 0, 159)))))
   Call: (263) [system] fail
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Call: (263) [user] retract(metta_file_comment(_80210, _80212, _80214, _80216, _80218))
^  Exit: (263) [user] retract(metta_file_comment(8, 0, 159, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], '$stream_position'(159, 8, 0, 159)))
^  Call: (263) [user] trly(untyped_to_metta, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _5908)
^  Call: (264) [user] once(call(untyped_to_metta, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _84008))
^  Unify: (264) [system] once(user:call(untyped_to_metta, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _84008))
^  Call: (265) [user] call(untyped_to_metta, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _84008)
^  Unify: (265) [system] call(user:untyped_to_metta, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _84008)
^  Call: (266) [user] untyped_to_metta([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _84008)
^  Unify: (266) [user] untyped_to_metta([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _84008)
^  Call: (267) [user] must_det_ll(trly(mfix_vars1, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _89620))
^  Unify: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _89620))
^  Call: (268) [user] once(user:trly(mfix_vars1, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _89620))
^  Unify: (268) [system] once(user:trly(mfix_vars1, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _89620))
^  Call: (269) [user] trly(mfix_vars1, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _89620)
^  Unify: (269) [user] trly(mfix_vars1, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _89620)
^  Call: (270) [user] once(call(mfix_vars1, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206))
^  Unify: (270) [system] once(user:call(mfix_vars1, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206))
^  Call: (271) [user] call(mfix_vars1, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206)
^  Unify: (271) [system] call(user:mfix_vars1, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206)
^  Call: (272) [user] mfix_vars1([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206)
^  Unify: (272) [user] mfix_vars1([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206)
   Call: (273) [system] var([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Redo: (272) [user] mfix_vars1([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206)
^  Unify: (272) [user] mfix_vars1([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], '$VAR'(_102666))
   Call: (273) [system] atom([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Redo: (272) [user] mfix_vars1([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206)
^  Unify: (272) [user] mfix_vars1([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206)
   Call: (273) [system] [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]==true
^  Redo: (272) [user] mfix_vars1([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206)
^  Unify: (272) [user] mfix_vars1([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206)
   Call: (273) [system] [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]==false
^  Redo: (272) [user] mfix_vars1([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206)
^  Unify: (272) [user] mfix_vars1([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206)
   Call: (273) [system] (:)=='['
^  Redo: (272) [user] mfix_vars1([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206)
^  Unify: (272) [user] mfix_vars1([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206)
   Call: (273) [system] (:)=='{'
^  Redo: (272) [user] mfix_vars1([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206)
^  Unify: (272) [user] mfix_vars1([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206)
   Call: (273) [system] is_list([chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
   Exit: (273) [system] is_list([chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
   Call: (273) [lists] lists:last([chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _119360)
   Unify: (273) [lists] lists:last([chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _119360)
   Call: (274) [lists] lists:last_([[->, 'Atom', 'Variable', 'Atom', 'Atom']], chain, _119360)
   Unify: (274) [lists] lists:last_([[->, 'Atom', 'Variable', 'Atom', 'Atom']], chain, _119360)
   Call: (275) [lists] lists:last_([], [->, 'Atom', 'Variable', 'Atom', 'Atom'], _119360)
   Unify: (275) [lists] lists:last_([], [->, 'Atom', 'Variable', 'Atom', 'Atom'], [->, 'Atom', 'Variable', 'Atom', 'Atom'])
   Exit: (275) [lists] lists:last_([], [->, 'Atom', 'Variable', 'Atom', 'Atom'], [->, 'Atom', 'Variable', 'Atom', 'Atom'])
   Exit: (274) [lists] lists:last_([[->, 'Atom', 'Variable', 'Atom', 'Atom']], chain, [->, 'Atom', 'Variable', 'Atom', 'Atom'])
   Exit: (273) [lists] lists:last([chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [->, 'Atom', 'Variable', 'Atom', 'Atom'])
   Call: (273) [system] [->, 'Atom', 'Variable', 'Atom', 'Atom']=='}'
^  Redo: (272) [user] mfix_vars1([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206)
^  Unify: (272) [user] mfix_vars1([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206)
   Call: (273) [system] [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]==[_130524, _130530]
^  Redo: (272) [user] mfix_vars1([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206)
^  Unify: (272) [user] mfix_vars1([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206)
   Call: (273) [system] fail
^  Redo: (272) [user] mfix_vars1([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206)
^  Unify: (272) [user] mfix_vars1([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206)
   Call: (273) [system] is_list([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
   Exit: (273) [system] is_list([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Call: (273) [user] apply:maplist(mfix_vars1, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206)
^  Unify: (273) [apply] apply:maplist(user:mfix_vars1, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206)
   Call: (274) [apply] apply:maplist_([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _95206, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [_140754|_140756], user:mfix_vars1)
^  Call: (275) [user] mfix_vars1(:, _140754)
^  Unify: (275) [user] mfix_vars1(:, _140754)
   Call: (276) [system] var(:)
^  Redo: (275) [user] mfix_vars1(:, _140754)
^  Unify: (275) [user] mfix_vars1(:, '$VAR'(_145400))
   Call: (276) [system] atom(:)
   Exit: (276) [system] atom(:)
^  Call: (276) [user] symbol_concat($, _148178, :)
^  Unify: (276) [user] symbol_concat($, _148178, :)
   Call: (277) [system] atom_concat($, _148178, :)
   Fail: (277) [system] atom_concat($, _148178, :)
^  Fail: (276) [user] symbol_concat($, _148178, :)
^  Redo: (275) [user] mfix_vars1(:, _140754)
^  Unify: (275) [user] mfix_vars1(:, _140754)
   Call: (276) [system] (:)==true
^  Redo: (275) [user] mfix_vars1(:, _140754)
^  Unify: (275) [user] mfix_vars1(:, _140754)
   Call: (276) [system] (:)==false
^  Redo: (275) [user] mfix_vars1(:, _140754)
^  Unify: (275) [user] mfix_vars1(:, _140754)
   Call: (276) [system] (:)==[_160266, _160272]
^  Redo: (275) [user] mfix_vars1(:, _140754)
^  Unify: (275) [user] mfix_vars1(:, _140754)
   Call: (276) [system] is_list(:)
^  Redo: (275) [user] mfix_vars1(:, _140754)
^  Unify: (275) [user] mfix_vars1(:, _140754)
   Call: (276) [system] string(:)
^  Redo: (275) [user] mfix_vars1(:, _140754)
^  Unify: (275) [user] mfix_vars1(:, _140754)
   Call: (276) [system] compound(:)
^  Redo: (275) [user] mfix_vars1(:, _140754)
^  Unify: (275) [user] mfix_vars1(:, _140754)
^  Call: (276) [user] symbol(:)
^  Unify: (276) [user] symbol(:)
   Call: (277) [system] atom(:)
   Exit: (277) [system] atom(:)
^  Exit: (276) [user] symbol(:)
^  Unify: (275) [user] mfix_vars1(:, :)
^  Exit: (275) [user] mfix_vars1(:, :)
   Call: (275) [apply] apply:maplist_([chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _140756, user:mfix_vars1)
   Unify: (275) [apply] apply:maplist_([chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [_178810|_178812], user:mfix_vars1)
^  Call: (276) [user] mfix_vars1(chain, _178810)
^  Unify: (276) [user] mfix_vars1(chain, _178810)
   Call: (277) [system] var(chain)
^  Redo: (276) [user] mfix_vars1(chain, _178810)
^  Unify: (276) [user] mfix_vars1(chain, '$VAR'(_183456))
   Call: (277) [system] atom(chain)
   Exit: (277) [system] atom(chain)
^  Call: (277) [user] symbol_concat($, _186234, chain)
^  Unify: (277) [user] symbol_concat($, _186234, chain)
   Call: (278) [system] atom_concat($, _186234, chain)
   Fail: (278) [system] atom_concat($, _186234, chain)
^  Fail: (277) [user] symbol_concat($, _186234, chain)
^  Redo: (276) [user] mfix_vars1(chain, _178810)
^  Unify: (276) [user] mfix_vars1(chain, _178810)
   Call: (277) [system] chain==true
^  Redo: (276) [user] mfix_vars1(chain, _178810)
^  Unify: (276) [user] mfix_vars1(chain, _178810)
   Call: (277) [system] chain==false
^  Redo: (276) [user] mfix_vars1(chain, _178810)
^  Unify: (276) [user] mfix_vars1(chain, _178810)
   Call: (277) [system] chain==[_198322, _198328]
^  Redo: (276) [user] mfix_vars1(chain, _178810)
^  Unify: (276) [user] mfix_vars1(chain, _178810)
   Call: (277) [system] is_list(chain)
^  Redo: (276) [user] mfix_vars1(chain, _178810)
^  Unify: (276) [user] mfix_vars1(chain, _178810)
   Call: (277) [system] string(chain)
^  Redo: (276) [user] mfix_vars1(chain, _178810)
^  Unify: (276) [user] mfix_vars1(chain, _178810)
   Call: (277) [system] compound(chain)
^  Redo: (276) [user] mfix_vars1(chain, _178810)
^  Unify: (276) [user] mfix_vars1(chain, _178810)
^  Call: (277) [user] symbol(chain)
^  Unify: (277) [user] symbol(chain)
   Call: (278) [system] atom(chain)
   Exit: (278) [system] atom(chain)
^  Exit: (277) [user] symbol(chain)
^  Unify: (276) [user] mfix_vars1(chain, chain)
^  Exit: (276) [user] mfix_vars1(chain, chain)
   Call: (276) [apply] apply:maplist_([[->, 'Atom', 'Variable', 'Atom', 'Atom']], _178812, user:mfix_vars1)
   Unify: (276) [apply] apply:maplist_([[->, 'Atom', 'Variable', 'Atom', 'Atom']], [_216866|_216868], user:mfix_vars1)
^  Call: (277) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _216866)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _216866)
   Call: (278) [system] var([->, 'Atom', 'Variable', 'Atom', 'Atom'])
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _216866)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], '$VAR'(_221512))
   Call: (278) [system] atom([->, 'Atom', 'Variable', 'Atom', 'Atom'])
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _216866)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _216866)
   Call: (278) [system] [->, 'Atom', 'Variable', 'Atom', 'Atom']==true
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _216866)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _216866)
   Call: (278) [system] [->, 'Atom', 'Variable', 'Atom', 'Atom']==false
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _216866)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _216866)
   Call: (278) [system] (->)=='['
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _216866)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _216866)
   Call: (278) [system] (->)=='{'
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _216866)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _216866)
   Call: (278) [system] is_list(['Atom', 'Variable', 'Atom', 'Atom'])
   Exit: (278) [system] is_list(['Atom', 'Variable', 'Atom', 'Atom'])
   Call: (278) [lists] lists:last(['Atom', 'Variable', 'Atom', 'Atom'], _238206)
   Unify: (278) [lists] lists:last(['Atom', 'Variable', 'Atom', 'Atom'], _238206)
   Call: (279) [lists] lists:last_(['Variable', 'Atom', 'Atom'], 'Atom', _238206)
   Unify: (279) [lists] lists:last_(['Variable', 'Atom', 'Atom'], 'Atom', _238206)
   Call: (280) [lists] lists:last_(['Atom', 'Atom'], 'Variable', _238206)
   Unify: (280) [lists] lists:last_(['Atom', 'Atom'], 'Variable', _238206)
   Call: (281) [lists] lists:last_(['Atom'], 'Atom', _238206)
   Unify: (281) [lists] lists:last_(['Atom'], 'Atom', _238206)
   Call: (282) [lists] lists:last_([], 'Atom', _238206)
   Unify: (282) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (282) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (281) [lists] lists:last_(['Atom'], 'Atom', 'Atom')
   Exit: (280) [lists] lists:last_(['Atom', 'Atom'], 'Variable', 'Atom')
   Exit: (279) [lists] lists:last_(['Variable', 'Atom', 'Atom'], 'Atom', 'Atom')
   Exit: (278) [lists] lists:last(['Atom', 'Variable', 'Atom', 'Atom'], 'Atom')
   Call: (278) [system] 'Atom'=='}'
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _216866)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _216866)
   Call: (278) [system] [->, 'Atom', 'Variable', 'Atom', 'Atom']==[_254962, _254968]
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _216866)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _216866)
   Call: (278) [system] fail
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _216866)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _216866)
   Call: (278) [system] is_list([->, 'Atom', 'Variable', 'Atom', 'Atom'])
   Exit: (278) [system] is_list([->, 'Atom', 'Variable', 'Atom', 'Atom'])
^  Call: (278) [user] apply:maplist(mfix_vars1, [->, 'Atom', 'Variable', 'Atom', 'Atom'], _216866)
^  Unify: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Variable', 'Atom', 'Atom'], _216866)
   Call: (279) [apply] apply:maplist_([->, 'Atom', 'Variable', 'Atom', 'Atom'], _216866, user:mfix_vars1)
   Unify: (279) [apply] apply:maplist_([->, 'Atom', 'Variable', 'Atom', 'Atom'], [_265192|_265194], user:mfix_vars1)
^  Call: (280) [user] mfix_vars1(->, _265192)
^  Unify: (280) [user] mfix_vars1(->, _265192)
   Call: (281) [system] var(->)
^  Redo: (280) [user] mfix_vars1(->, _265192)
^  Unify: (280) [user] mfix_vars1(->, '$VAR'(_269838))
   Call: (281) [system] atom(->)
   Exit: (281) [system] atom(->)
^  Call: (281) [user] symbol_concat($, _272616, ->)
^  Unify: (281) [user] symbol_concat($, _272616, ->)
   Call: (282) [system] atom_concat($, _272616, ->)
   Fail: (282) [system] atom_concat($, _272616, ->)
^  Fail: (281) [user] symbol_concat($, _272616, ->)
^  Redo: (280) [user] mfix_vars1(->, _265192)
^  Unify: (280) [user] mfix_vars1(->, _265192)
   Call: (281) [system] (->)==true
^  Redo: (280) [user] mfix_vars1(->, _265192)
^  Unify: (280) [user] mfix_vars1(->, _265192)
   Call: (281) [system] (->)==false
^  Redo: (280) [user] mfix_vars1(->, _265192)
^  Unify: (280) [user] mfix_vars1(->, _265192)
   Call: (281) [system] (->)==[_284704, _284710]
^  Redo: (280) [user] mfix_vars1(->, _265192)
^  Unify: (280) [user] mfix_vars1(->, _265192)
   Call: (281) [system] is_list(->)
^  Redo: (280) [user] mfix_vars1(->, _265192)
^  Unify: (280) [user] mfix_vars1(->, _265192)
   Call: (281) [system] string(->)
^  Redo: (280) [user] mfix_vars1(->, _265192)
^  Unify: (280) [user] mfix_vars1(->, _265192)
   Call: (281) [system] compound(->)
^  Redo: (280) [user] mfix_vars1(->, _265192)
^  Unify: (280) [user] mfix_vars1(->, _265192)
^  Call: (281) [user] symbol(->)
^  Unify: (281) [user] symbol(->)
   Call: (282) [system] atom(->)
   Exit: (282) [system] atom(->)
^  Exit: (281) [user] symbol(->)
^  Unify: (280) [user] mfix_vars1(->, ->)
^  Exit: (280) [user] mfix_vars1(->, ->)
   Call: (280) [apply] apply:maplist_(['Atom', 'Variable', 'Atom', 'Atom'], _265194, user:mfix_vars1)
   Unify: (280) [apply] apply:maplist_(['Atom', 'Variable', 'Atom', 'Atom'], [_303248|_303250], user:mfix_vars1)
^  Call: (281) [user] mfix_vars1('Atom', _303248)
^  Unify: (281) [user] mfix_vars1('Atom', _303248)
   Call: (282) [system] var('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _303248)
^  Unify: (281) [user] mfix_vars1('Atom', '$VAR'(_307894))
   Call: (282) [system] atom('Atom')
   Exit: (282) [system] atom('Atom')
^  Call: (282) [user] symbol_concat($, _310672, 'Atom')
^  Unify: (282) [user] symbol_concat($, _310672, 'Atom')
   Call: (283) [system] atom_concat($, _310672, 'Atom')
   Fail: (283) [system] atom_concat($, _310672, 'Atom')
^  Fail: (282) [user] symbol_concat($, _310672, 'Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _303248)
^  Unify: (281) [user] mfix_vars1('Atom', _303248)
   Call: (282) [system] 'Atom'==true
^  Redo: (281) [user] mfix_vars1('Atom', _303248)
^  Unify: (281) [user] mfix_vars1('Atom', _303248)
   Call: (282) [system] 'Atom'==false
^  Redo: (281) [user] mfix_vars1('Atom', _303248)
^  Unify: (281) [user] mfix_vars1('Atom', _303248)
   Call: (282) [system] 'Atom'==[_322760, _322766]
^  Redo: (281) [user] mfix_vars1('Atom', _303248)
^  Unify: (281) [user] mfix_vars1('Atom', _303248)
   Call: (282) [system] is_list('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _303248)
^  Unify: (281) [user] mfix_vars1('Atom', _303248)
   Call: (282) [system] string('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _303248)
^  Unify: (281) [user] mfix_vars1('Atom', _303248)
   Call: (282) [system] compound('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _303248)
^  Unify: (281) [user] mfix_vars1('Atom', _303248)
^  Call: (282) [user] symbol('Atom')
^  Unify: (282) [user] symbol('Atom')
   Call: (283) [system] atom('Atom')
   Exit: (283) [system] atom('Atom')
^  Exit: (282) [user] symbol('Atom')
^  Unify: (281) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (281) [user] mfix_vars1('Atom', 'Atom')
   Call: (281) [apply] apply:maplist_(['Variable', 'Atom', 'Atom'], _303250, user:mfix_vars1)
   Unify: (281) [apply] apply:maplist_(['Variable', 'Atom', 'Atom'], [_341304|_341306], user:mfix_vars1)
^  Call: (282) [user] mfix_vars1('Variable', _341304)
^  Unify: (282) [user] mfix_vars1('Variable', _341304)
   Call: (283) [system] var('Variable')
^  Redo: (282) [user] mfix_vars1('Variable', _341304)
^  Unify: (282) [user] mfix_vars1('Variable', '$VAR'(_345950))
   Call: (283) [system] atom('Variable')
   Exit: (283) [system] atom('Variable')
^  Call: (283) [user] symbol_concat($, _348728, 'Variable')
^  Unify: (283) [user] symbol_concat($, _348728, 'Variable')
   Call: (284) [system] atom_concat($, _348728, 'Variable')
   Fail: (284) [system] atom_concat($, _348728, 'Variable')
^  Fail: (283) [user] symbol_concat($, _348728, 'Variable')
^  Redo: (282) [user] mfix_vars1('Variable', _341304)
^  Unify: (282) [user] mfix_vars1('Variable', _341304)
   Call: (283) [system] 'Variable'==true
^  Redo: (282) [user] mfix_vars1('Variable', _341304)
^  Unify: (282) [user] mfix_vars1('Variable', _341304)
   Call: (283) [system] 'Variable'==false
^  Redo: (282) [user] mfix_vars1('Variable', _341304)
^  Unify: (282) [user] mfix_vars1('Variable', _341304)
   Call: (283) [system] 'Variable'==[_360816, _360822]
^  Redo: (282) [user] mfix_vars1('Variable', _341304)
^  Unify: (282) [user] mfix_vars1('Variable', _341304)
   Call: (283) [system] is_list('Variable')
^  Redo: (282) [user] mfix_vars1('Variable', _341304)
^  Unify: (282) [user] mfix_vars1('Variable', _341304)
   Call: (283) [system] string('Variable')
^  Redo: (282) [user] mfix_vars1('Variable', _341304)
^  Unify: (282) [user] mfix_vars1('Variable', _341304)
   Call: (283) [system] compound('Variable')
^  Redo: (282) [user] mfix_vars1('Variable', _341304)
^  Unify: (282) [user] mfix_vars1('Variable', _341304)
^  Call: (283) [user] symbol('Variable')
^  Unify: (283) [user] symbol('Variable')
   Call: (284) [system] atom('Variable')
   Exit: (284) [system] atom('Variable')
^  Exit: (283) [user] symbol('Variable')
^  Unify: (282) [user] mfix_vars1('Variable', 'Variable')
^  Exit: (282) [user] mfix_vars1('Variable', 'Variable')
   Call: (282) [apply] apply:maplist_(['Atom', 'Atom'], _341306, user:mfix_vars1)
   Unify: (282) [apply] apply:maplist_(['Atom', 'Atom'], [_379360|_379362], user:mfix_vars1)
^  Call: (283) [user] mfix_vars1('Atom', _379360)
^  Unify: (283) [user] mfix_vars1('Atom', _379360)
   Call: (284) [system] var('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _379360)
^  Unify: (283) [user] mfix_vars1('Atom', '$VAR'(_384006))
   Call: (284) [system] atom('Atom')
   Exit: (284) [system] atom('Atom')
^  Call: (284) [user] symbol_concat($, _386784, 'Atom')
^  Unify: (284) [user] symbol_concat($, _386784, 'Atom')
   Call: (285) [system] atom_concat($, _386784, 'Atom')
   Fail: (285) [system] atom_concat($, _386784, 'Atom')
^  Fail: (284) [user] symbol_concat($, _386784, 'Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _379360)
^  Unify: (283) [user] mfix_vars1('Atom', _379360)
   Call: (284) [system] 'Atom'==true
^  Redo: (283) [user] mfix_vars1('Atom', _379360)
^  Unify: (283) [user] mfix_vars1('Atom', _379360)
   Call: (284) [system] 'Atom'==false
^  Redo: (283) [user] mfix_vars1('Atom', _379360)
^  Unify: (283) [user] mfix_vars1('Atom', _379360)
   Call: (284) [system] 'Atom'==[_398872, _398878]
^  Redo: (283) [user] mfix_vars1('Atom', _379360)
^  Unify: (283) [user] mfix_vars1('Atom', _379360)
   Call: (284) [system] is_list('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _379360)
^  Unify: (283) [user] mfix_vars1('Atom', _379360)
   Call: (284) [system] string('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _379360)
^  Unify: (283) [user] mfix_vars1('Atom', _379360)
   Call: (284) [system] compound('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _379360)
^  Unify: (283) [user] mfix_vars1('Atom', _379360)
^  Call: (284) [user] symbol('Atom')
^  Unify: (284) [user] symbol('Atom')
   Call: (285) [system] atom('Atom')
   Exit: (285) [system] atom('Atom')
^  Exit: (284) [user] symbol('Atom')
^  Unify: (283) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (283) [user] mfix_vars1('Atom', 'Atom')
   Call: (283) [apply] apply:maplist_(['Atom'], _379362, user:mfix_vars1)
   Unify: (283) [apply] apply:maplist_(['Atom'], [_417416|_417418], user:mfix_vars1)
^  Call: (284) [user] mfix_vars1('Atom', _417416)
^  Unify: (284) [user] mfix_vars1('Atom', _417416)
   Call: (285) [system] var('Atom')
^  Redo: (284) [user] mfix_vars1('Atom', _417416)
^  Unify: (284) [user] mfix_vars1('Atom', '$VAR'(_422062))
   Call: (285) [system] atom('Atom')
   Exit: (285) [system] atom('Atom')
^  Call: (285) [user] symbol_concat($, _424840, 'Atom')
^  Unify: (285) [user] symbol_concat($, _424840, 'Atom')
   Call: (286) [system] atom_concat($, _424840, 'Atom')
   Fail: (286) [system] atom_concat($, _424840, 'Atom')
^  Fail: (285) [user] symbol_concat($, _424840, 'Atom')
^  Redo: (284) [user] mfix_vars1('Atom', _417416)
^  Unify: (284) [user] mfix_vars1('Atom', _417416)
   Call: (285) [system] 'Atom'==true
^  Redo: (284) [user] mfix_vars1('Atom', _417416)
^  Unify: (284) [user] mfix_vars1('Atom', _417416)
   Call: (285) [system] 'Atom'==false
^  Redo: (284) [user] mfix_vars1('Atom', _417416)
^  Unify: (284) [user] mfix_vars1('Atom', _417416)
   Call: (285) [system] 'Atom'==[_436928, _436934]
^  Redo: (284) [user] mfix_vars1('Atom', _417416)
^  Unify: (284) [user] mfix_vars1('Atom', _417416)
   Call: (285) [system] is_list('Atom')
^  Redo: (284) [user] mfix_vars1('Atom', _417416)
^  Unify: (284) [user] mfix_vars1('Atom', _417416)
   Call: (285) [system] string('Atom')
^  Redo: (284) [user] mfix_vars1('Atom', _417416)
^  Unify: (284) [user] mfix_vars1('Atom', _417416)
   Call: (285) [system] compound('Atom')
^  Redo: (284) [user] mfix_vars1('Atom', _417416)
^  Unify: (284) [user] mfix_vars1('Atom', _417416)
^  Call: (285) [user] symbol('Atom')
^  Unify: (285) [user] symbol('Atom')
   Call: (286) [system] atom('Atom')
   Exit: (286) [system] atom('Atom')
^  Exit: (285) [user] symbol('Atom')
^  Unify: (284) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (284) [user] mfix_vars1('Atom', 'Atom')
   Call: (284) [apply] apply:maplist_([], _417418, user:mfix_vars1)
   Unify: (284) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (284) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (283) [apply] apply:maplist_(['Atom'], ['Atom'], user:mfix_vars1)
   Exit: (282) [apply] apply:maplist_(['Atom', 'Atom'], ['Atom', 'Atom'], user:mfix_vars1)
   Exit: (281) [apply] apply:maplist_(['Variable', 'Atom', 'Atom'], ['Variable', 'Atom', 'Atom'], user:mfix_vars1)
   Exit: (280) [apply] apply:maplist_(['Atom', 'Variable', 'Atom', 'Atom'], ['Atom', 'Variable', 'Atom', 'Atom'], user:mfix_vars1)
   Exit: (279) [apply] apply:maplist_([->, 'Atom', 'Variable', 'Atom', 'Atom'], [->, 'Atom', 'Variable', 'Atom', 'Atom'], user:mfix_vars1)
^  Exit: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Variable', 'Atom', 'Atom'], [->, 'Atom', 'Variable', 'Atom', 'Atom'])
^  Exit: (277) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], [->, 'Atom', 'Variable', 'Atom', 'Atom'])
   Call: (277) [apply] apply:maplist_([], _216868, user:mfix_vars1)
   Unify: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (276) [apply] apply:maplist_([[->, 'Atom', 'Variable', 'Atom', 'Atom']], [[->, 'Atom', 'Variable', 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (275) [apply] apply:maplist_([chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], user:mfix_vars1)
^  Exit: (273) [apply] apply:maplist(user:mfix_vars1, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (272) [user] mfix_vars1([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (271) [system] call(user:mfix_vars1, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (270) [system] once(user:call(mfix_vars1, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]))
   Call: (270) [system] [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]\=@=[:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]
^  Redo: (269) [user] trly(mfix_vars1, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _89620)
^  Unify: (269) [user] trly(mfix_vars1, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (269) [user] trly(mfix_vars1, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (268) [system] once(user:trly(mfix_vars1, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_c, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _478770))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_c, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _478770))
^  Call: (268) [user] once(user:trly(cons_to_c, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _478770))
^  Unify: (268) [system] once(user:trly(cons_to_c, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _478770))
^  Call: (269) [user] trly(cons_to_c, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _478770)
^  Unify: (269) [user] trly(cons_to_c, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _478770)
^  Call: (270) [user] once(call(cons_to_c, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _484356))
^  Unify: (270) [system] once(user:call(cons_to_c, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _484356))
^  Call: (271) [user] call(cons_to_c, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _484356)
^  Unify: (271) [system] call(user:cons_to_c, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _484356)
^  Call: (272) [user] cons_to_c([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _484356)
^  Unify: (272) [user] cons_to_c([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_c([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (271) [system] call(user:cons_to_c, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (270) [system] once(user:call(cons_to_c, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]))
   Call: (270) [system] [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]\=@=[:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]
^  Redo: (269) [user] trly(cons_to_c, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _478770)
^  Unify: (269) [user] trly(cons_to_c, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (269) [user] trly(cons_to_c, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (268) [system] once(user:trly(cons_to_c, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_c, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_l, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _84008))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_l, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _84008))
^  Call: (268) [user] once(user:trly(cons_to_l, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _84008))
^  Unify: (268) [system] once(user:trly(cons_to_l, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _84008))
^  Call: (269) [user] trly(cons_to_l, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _84008)
^  Unify: (269) [user] trly(cons_to_l, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _84008)
^  Call: (270) [user] once(call(cons_to_l, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _506676))
^  Unify: (270) [system] once(user:call(cons_to_l, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _506676))
^  Call: (271) [user] call(cons_to_l, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _506676)
^  Unify: (271) [system] call(user:cons_to_l, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _506676)
^  Call: (272) [user] cons_to_l([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _506676)
^  Unify: (272) [user] cons_to_l([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_l([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (271) [system] call(user:cons_to_l, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (270) [system] once(user:call(cons_to_l, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]))
   Call: (270) [system] [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]\=@=[:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]
^  Redo: (269) [user] trly(cons_to_l, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _84008)
^  Unify: (269) [user] trly(cons_to_l, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (269) [user] trly(cons_to_l, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (268) [system] once(user:trly(cons_to_l, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_l, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]))
^  Exit: (266) [user] untyped_to_metta([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (265) [system] call(user:untyped_to_metta, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (264) [system] once(user:call(untyped_to_metta, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]))
   Call: (264) [system] [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]\=@=[:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']]
^  Redo: (263) [user] trly(untyped_to_metta, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (263) [user] trly(untyped_to_metta, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
   Call: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])))
   Unify: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])))
   Exit: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])))
^  Exit: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Call: (257) [user] subst_vars([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _23030, [], _23032)
^  Unify: (257) [user] subst_vars([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], [])
   Call: (258) [system] var([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Redo: (257) [user] subst_vars([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _23030, [], _23032)
^  Unify: (257) [user] subst_vars([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [_26768|_26770], [], _23032)
^  Call: (258) [user] subst_vars(:, _26768, [], _27708)
^  Unify: (258) [user] subst_vars(:, :, [], [])
   Call: (259) [system] var(:)
^  Redo: (258) [user] subst_vars(:, _26768, [], _27708)
^  Unify: (258) [user] subst_vars(:, _26768, [], _27708)
   Call: (259) [system] atom(:)
   Exit: (259) [system] atom(:)
^  Call: (259) [user] symbol_concat($, _34226, :)
^  Unify: (259) [user] symbol_concat($, _34226, :)
   Call: (260) [system] atom_concat($, _34226, :)
   Fail: (260) [system] atom_concat($, _34226, :)
^  Fail: (259) [user] symbol_concat($, _34226, :)
^  Redo: (258) [user] subst_vars(:, _26768, [], _27708)
^  Unify: (258) [user] subst_vars(:, _26768, [], _27708)
   Call: (259) [system] compound(:)
^  Redo: (258) [user] subst_vars(:, _26768, [], _27708)
^  Unify: (258) [user] subst_vars(:, :, [], [])
^  Exit: (258) [user] subst_vars(:, :, [], [])
^  Call: (258) [user] subst_vars([chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _26770, [], _23032)
^  Unify: (258) [user] subst_vars([chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], [])
   Call: (259) [system] var([chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Redo: (258) [user] subst_vars([chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _26770, [], _23032)
^  Unify: (258) [user] subst_vars([chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [_48226|_48228], [], _23032)
^  Call: (259) [user] subst_vars(chain, _48226, [], _49166)
^  Unify: (259) [user] subst_vars(chain, chain, [], [])
   Call: (260) [system] var(chain)
^  Redo: (259) [user] subst_vars(chain, _48226, [], _49166)
^  Unify: (259) [user] subst_vars(chain, _48226, [], _49166)
   Call: (260) [system] atom(chain)
   Exit: (260) [system] atom(chain)
^  Call: (260) [user] symbol_concat($, _55684, chain)
^  Unify: (260) [user] symbol_concat($, _55684, chain)
   Call: (261) [system] atom_concat($, _55684, chain)
   Fail: (261) [system] atom_concat($, _55684, chain)
^  Fail: (260) [user] symbol_concat($, _55684, chain)
^  Redo: (259) [user] subst_vars(chain, _48226, [], _49166)
^  Unify: (259) [user] subst_vars(chain, _48226, [], _49166)
   Call: (260) [system] compound(chain)
^  Redo: (259) [user] subst_vars(chain, _48226, [], _49166)
^  Unify: (259) [user] subst_vars(chain, chain, [], [])
^  Exit: (259) [user] subst_vars(chain, chain, [], [])
^  Call: (259) [user] subst_vars([[->, 'Atom', 'Variable', 'Atom', 'Atom']], _48228, [], _23032)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Variable', 'Atom', 'Atom']], [[->, 'Atom', 'Variable', 'Atom', 'Atom']], [], [])
   Call: (260) [system] var([[->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Redo: (259) [user] subst_vars([[->, 'Atom', 'Variable', 'Atom', 'Atom']], _48228, [], _23032)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Variable', 'Atom', 'Atom']], [_69684|_69686], [], _23032)
^  Call: (260) [user] subst_vars([->, 'Atom', 'Variable', 'Atom', 'Atom'], _69684, [], _70624)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Variable', 'Atom', 'Atom'], [->, 'Atom', 'Variable', 'Atom', 'Atom'], [], [])
   Call: (261) [system] var([->, 'Atom', 'Variable', 'Atom', 'Atom'])
^  Redo: (260) [user] subst_vars([->, 'Atom', 'Variable', 'Atom', 'Atom'], _69684, [], _70624)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Variable', 'Atom', 'Atom'], [_74360|_74362], [], _70624)
^  Call: (261) [user] subst_vars(->, _74360, [], _75300)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
   Call: (262) [system] var(->)
^  Redo: (261) [user] subst_vars(->, _74360, [], _75300)
^  Unify: (261) [user] subst_vars(->, _74360, [], _75300)
   Call: (262) [system] atom(->)
   Exit: (262) [system] atom(->)
^  Call: (262) [user] symbol_concat($, _81818, ->)
^  Unify: (262) [user] symbol_concat($, _81818, ->)
   Call: (263) [system] atom_concat($, _81818, ->)
   Fail: (263) [system] atom_concat($, _81818, ->)
^  Fail: (262) [user] symbol_concat($, _81818, ->)
^  Redo: (261) [user] subst_vars(->, _74360, [], _75300)
^  Unify: (261) [user] subst_vars(->, _74360, [], _75300)
   Call: (262) [system] compound(->)
^  Redo: (261) [user] subst_vars(->, _74360, [], _75300)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
^  Exit: (261) [user] subst_vars(->, ->, [], [])
^  Call: (261) [user] subst_vars(['Atom', 'Variable', 'Atom', 'Atom'], _74362, [], _70624)
^  Unify: (261) [user] subst_vars(['Atom', 'Variable', 'Atom', 'Atom'], ['Atom', 'Variable', 'Atom', 'Atom'], [], [])
   Call: (262) [system] var(['Atom', 'Variable', 'Atom', 'Atom'])
^  Redo: (261) [user] subst_vars(['Atom', 'Variable', 'Atom', 'Atom'], _74362, [], _70624)
^  Unify: (261) [user] subst_vars(['Atom', 'Variable', 'Atom', 'Atom'], [_95818|_95820], [], _70624)
^  Call: (262) [user] subst_vars('Atom', _95818, [], _96758)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (263) [system] var('Atom')
^  Redo: (262) [user] subst_vars('Atom', _95818, [], _96758)
^  Unify: (262) [user] subst_vars('Atom', _95818, [], _96758)
   Call: (263) [system] atom('Atom')
   Exit: (263) [system] atom('Atom')
^  Call: (263) [user] symbol_concat($, _103276, 'Atom')
^  Unify: (263) [user] symbol_concat($, _103276, 'Atom')
   Call: (264) [system] atom_concat($, _103276, 'Atom')
   Fail: (264) [system] atom_concat($, _103276, 'Atom')
^  Fail: (263) [user] symbol_concat($, _103276, 'Atom')
^  Redo: (262) [user] subst_vars('Atom', _95818, [], _96758)
^  Unify: (262) [user] subst_vars('Atom', _95818, [], _96758)
   Call: (263) [system] compound('Atom')
^  Redo: (262) [user] subst_vars('Atom', _95818, [], _96758)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (262) [user] subst_vars(['Variable', 'Atom', 'Atom'], _95820, [], _70624)
^  Unify: (262) [user] subst_vars(['Variable', 'Atom', 'Atom'], ['Variable', 'Atom', 'Atom'], [], [])
   Call: (263) [system] var(['Variable', 'Atom', 'Atom'])
^  Redo: (262) [user] subst_vars(['Variable', 'Atom', 'Atom'], _95820, [], _70624)
^  Unify: (262) [user] subst_vars(['Variable', 'Atom', 'Atom'], [_117276|_117278], [], _70624)
^  Call: (263) [user] subst_vars('Variable', _117276, [], _118216)
^  Unify: (263) [user] subst_vars('Variable', 'Variable', [], [])
   Call: (264) [system] var('Variable')
^  Redo: (263) [user] subst_vars('Variable', _117276, [], _118216)
^  Unify: (263) [user] subst_vars('Variable', _117276, [], _118216)
   Call: (264) [system] atom('Variable')
   Exit: (264) [system] atom('Variable')
^  Call: (264) [user] symbol_concat($, _124734, 'Variable')
^  Unify: (264) [user] symbol_concat($, _124734, 'Variable')
   Call: (265) [system] atom_concat($, _124734, 'Variable')
   Fail: (265) [system] atom_concat($, _124734, 'Variable')
^  Fail: (264) [user] symbol_concat($, _124734, 'Variable')
^  Redo: (263) [user] subst_vars('Variable', _117276, [], _118216)
^  Unify: (263) [user] subst_vars('Variable', _117276, [], _118216)
   Call: (264) [system] compound('Variable')
^  Redo: (263) [user] subst_vars('Variable', _117276, [], _118216)
^  Unify: (263) [user] subst_vars('Variable', 'Variable', [], [])
^  Exit: (263) [user] subst_vars('Variable', 'Variable', [], [])
^  Call: (263) [user] subst_vars(['Atom', 'Atom'], _117278, [], _70624)
^  Unify: (263) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
   Call: (264) [system] var(['Atom', 'Atom'])
^  Redo: (263) [user] subst_vars(['Atom', 'Atom'], _117278, [], _70624)
^  Unify: (263) [user] subst_vars(['Atom', 'Atom'], [_138734|_138736], [], _70624)
^  Call: (264) [user] subst_vars('Atom', _138734, [], _139674)
^  Unify: (264) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (265) [system] var('Atom')
^  Redo: (264) [user] subst_vars('Atom', _138734, [], _139674)
^  Unify: (264) [user] subst_vars('Atom', _138734, [], _139674)
   Call: (265) [system] atom('Atom')
   Exit: (265) [system] atom('Atom')
^  Call: (265) [user] symbol_concat($, _146192, 'Atom')
^  Unify: (265) [user] symbol_concat($, _146192, 'Atom')
   Call: (266) [system] atom_concat($, _146192, 'Atom')
   Fail: (266) [system] atom_concat($, _146192, 'Atom')
^  Fail: (265) [user] symbol_concat($, _146192, 'Atom')
^  Redo: (264) [user] subst_vars('Atom', _138734, [], _139674)
^  Unify: (264) [user] subst_vars('Atom', _138734, [], _139674)
   Call: (265) [system] compound('Atom')
^  Redo: (264) [user] subst_vars('Atom', _138734, [], _139674)
^  Unify: (264) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (264) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (264) [user] subst_vars(['Atom'], _138736, [], _70624)
^  Unify: (264) [user] subst_vars(['Atom'], ['Atom'], [], [])
   Call: (265) [system] var(['Atom'])
^  Redo: (264) [user] subst_vars(['Atom'], _138736, [], _70624)
^  Unify: (264) [user] subst_vars(['Atom'], [_160192|_160194], [], _70624)
^  Call: (265) [user] subst_vars('Atom', _160192, [], _161132)
^  Unify: (265) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (266) [system] var('Atom')
^  Redo: (265) [user] subst_vars('Atom', _160192, [], _161132)
^  Unify: (265) [user] subst_vars('Atom', _160192, [], _161132)
   Call: (266) [system] atom('Atom')
   Exit: (266) [system] atom('Atom')
^  Call: (266) [user] symbol_concat($, _167650, 'Atom')
^  Unify: (266) [user] symbol_concat($, _167650, 'Atom')
   Call: (267) [system] atom_concat($, _167650, 'Atom')
   Fail: (267) [system] atom_concat($, _167650, 'Atom')
^  Fail: (266) [user] symbol_concat($, _167650, 'Atom')
^  Redo: (265) [user] subst_vars('Atom', _160192, [], _161132)
^  Unify: (265) [user] subst_vars('Atom', _160192, [], _161132)
   Call: (266) [system] compound('Atom')
^  Redo: (265) [user] subst_vars('Atom', _160192, [], _161132)
^  Unify: (265) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (265) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (265) [user] subst_vars([], _160194, [], _70624)
^  Unify: (265) [user] subst_vars([], [], [], [])
   Call: (266) [system] var([])
^  Redo: (265) [user] subst_vars([], _160194, [], _70624)
^  Unify: (265) [user] subst_vars([], [], [], [])
^  Exit: (265) [user] subst_vars([], [], [], [])
^  Exit: (264) [user] subst_vars(['Atom'], ['Atom'], [], [])
^  Exit: (263) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
^  Exit: (262) [user] subst_vars(['Variable', 'Atom', 'Atom'], ['Variable', 'Atom', 'Atom'], [], [])
^  Exit: (261) [user] subst_vars(['Atom', 'Variable', 'Atom', 'Atom'], ['Atom', 'Variable', 'Atom', 'Atom'], [], [])
^  Exit: (260) [user] subst_vars([->, 'Atom', 'Variable', 'Atom', 'Atom'], [->, 'Atom', 'Variable', 'Atom', 'Atom'], [], [])
^  Call: (260) [user] subst_vars([], _69686, [], _23032)
^  Unify: (260) [user] subst_vars([], [], [], [])
   Call: (261) [system] var([])
^  Redo: (260) [user] subst_vars([], _69686, [], _23032)
^  Unify: (260) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([], [], [], [])
^  Exit: (259) [user] subst_vars([[->, 'Atom', 'Variable', 'Atom', 'Atom']], [[->, 'Atom', 'Variable', 'Atom', 'Atom']], [], [])
^  Exit: (258) [user] subst_vars([chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], [])
^  Exit: (257) [user] subst_vars([:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], [])
   Call: (257) [system] _196612=metta_file_buffer(+, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(158, 7, 23, 158))
   Exit: (257) [system] metta_file_buffer(+, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(158, 7, 23, 158))=metta_file_buffer(+, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(158, 7, 23, 158))
^  Call: (257) [user] assertz(metta_file_buffer(+, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(158, 7, 23, 158)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(158, 7, 23, 158)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(158, 7, 23, 158))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(158, 7, 23, 158))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(158, 7, 23, 158))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, chain, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(158, 7, 23, 158))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
   Redo: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _247406)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _248344))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _248344)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 197)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _247406)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _247406)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_247406))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_247406))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_247406))
   Exit: (259) [system] nonvar(position(_247406))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(197, 8, 38, 197)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(197, 8, 38, 197))
   Call: (257) [user] current_read_mode(file, _267824)
   Unify: (257) [user] current_read_mode(file, _267824)
   Call: (258) [system] nb_current(file_mode, _267824)
   Redo: (257) [user] current_read_mode(file, _267824)
   Call: (258) [system] _267824=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _274274)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _274274)
^  Call: (258) [user] clause(t_l:s_reader_info(_274274), _276220, _276142)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _274274)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _274274)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _274274)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _274274)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _274274)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _274274)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _274274)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _274274)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _290050)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (260) [system] char_type('\n', space)
   Exit: (260) [system] char_type('\n', space)
   Call: (260) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (260) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _274274)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _274274)
   Call: (261) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _274274)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _274274)
   Call: (261) [system] peek_char((0x55aefe44e2f0), _300256)
   Exit: (261) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (261) [system] char_type('(', space)
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _274274)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _274274)
^  Call: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (262) [system] string((0x55aefe44e2f0))
^  Redo: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _274274)
^  Unify: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _274274)
^  Call: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _274274)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _274274)
   Call: (263) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _274274)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _274274)
   Call: (263) [system] peek_char((0x55aefe44e2f0), _316010)
   Exit: (263) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (263) [system] char_type('(', space)
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _274274)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _274274)
   Call: (263) [system] _320652=(0x55aefe44e2f0)
   Exit: (263) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (263) [user] once((read_position((0x55aefe44e2f0), _322520, _322522, _322524, _322526), read_sexpr((0x55aefe44e2f0), _322538), assertz(metta_file_comment(_322520, _322522, _322524, _322538, _322526))))
^  Unify: (263) [system] once(user:(read_position((0x55aefe44e2f0), _322520, _322522, _322524, _322526), read_sexpr((0x55aefe44e2f0), _322538), assertz(metta_file_comment(_322520, _322522, _322524, _322538, _322526))))
^  Call: (265) [user] read_position((0x55aefe44e2f0), _322520, _322522, _322524, _322526)
^  Unify: (265) [user] read_position((0x55aefe44e2f0), _322520, _322522, _322524, _322526)
   Call: (266) [system] stream_property((0x55aefe44e2f0), position(_322526))
   Unify: (266) [system] stream_property((0x55aefe44e2f0), position(_322526))
   Call: (267) [system] nonvar((0x55aefe44e2f0))
   Exit: (267) [system] nonvar((0x55aefe44e2f0))
   Call: (267) [system] nonvar(position(_322526))
   Exit: (267) [system] nonvar(position(_322526))
   Exit: (266) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(198, 9, 0, 198)))
   Call: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(198, 9, 0, 198), _322520)
   Unify: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(198, 9, 0, 198), _322520)
   Call: (267) [system] nonvar(line_count)
   Exit: (267) [system] nonvar(line_count)
   Call: (267) [$syspreds] stream_position_field(line_count, _336508)
   Unify: (267) [$syspreds] stream_position_field(line_count, 2)
   Exit: (267) [$syspreds] stream_position_field(line_count, 2)
   Call: (267) [system] arg(2, '$stream_position'(198, 9, 0, 198), _322520)
   Exit: (267) [system] arg(2, '$stream_position'(198, 9, 0, 198), 9)
   Exit: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(198, 9, 0, 198), 9)
   Call: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(198, 9, 0, 198), _322522)
   Unify: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(198, 9, 0, 198), _322522)
   Call: (267) [system] nonvar(line_position)
   Exit: (267) [system] nonvar(line_position)
   Call: (267) [$syspreds] stream_position_field(line_position, _345802)
   Unify: (267) [$syspreds] stream_position_field(line_position, 3)
   Exit: (267) [$syspreds] stream_position_field(line_position, 3)
   Call: (267) [system] arg(3, '$stream_position'(198, 9, 0, 198), _322522)
   Exit: (267) [system] arg(3, '$stream_position'(198, 9, 0, 198), 0)
   Exit: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(198, 9, 0, 198), 0)
   Call: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(198, 9, 0, 198), _322524)
   Unify: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(198, 9, 0, 198), _322524)
   Call: (267) [system] nonvar(char_count)
   Exit: (267) [system] nonvar(char_count)
   Call: (267) [$syspreds] stream_position_field(char_count, _355096)
   Unify: (267) [$syspreds] stream_position_field(char_count, 1)
   Exit: (267) [$syspreds] stream_position_field(char_count, 1)
   Call: (267) [system] arg(1, '$stream_position'(198, 9, 0, 198), _322524)
   Exit: (267) [system] arg(1, '$stream_position'(198, 9, 0, 198), 198)
   Exit: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(198, 9, 0, 198), 198)
^  Exit: (265) [user] read_position((0x55aefe44e2f0), 9, 0, 198, '$stream_position'(198, 9, 0, 198))
^  Call: (265) [user] read_sexpr((0x55aefe44e2f0), _322538)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _322538)
   Call: (266) [system] string((0x55aefe44e2f0))
^  Redo: (265) [user] read_sexpr((0x55aefe44e2f0), _322538)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _322538)
^  Call: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _322538)
^  Unify: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _322538)
^  Call: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _369966)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (268) [system] '('=(;)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', 'white')
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', end_of_line)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', space)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', cntrl)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (267) [system] get_char((0x55aefe44e2f0), _386750)
   Exit: (267) [system] get_char((0x55aefe44e2f0), '(')
   Call: (267) [system] '('='('
   Exit: (267) [system] '('='('
^  Call: (267) [user] read_list(')', (0x55aefe44e2f0), _322538)
^  Unify: (267) [user] read_list(')', (0x55aefe44e2f0), _322538)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _394176)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, 'white')
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, end_of_line)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, space)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _410960)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), :)
   Call: (268) [system] (:)=')'
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _322538)
   Call: (268) [system] (:)=end_of_file
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _322538)
^  Call: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _416538)
^  Unify: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _416538)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _420252)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, 'white')
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, end_of_line)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, space)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, cntrl)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] get_char((0x55aefe44e2f0), _437036)
   Exit: (269) [system] get_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)='('
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _416538)
   Call: (269) [system] (:)='['
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _416538)
   Call: (269) [system] (:)='{'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _416538)
   Call: (269) [system] (:)='"'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _416538)
   Call: (269) [system] (:)=!
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _416538)
   Call: (269) [system] (:)='\''
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _416538)
   Call: (269) [system] (:)='`'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _416538)
   Call: (269) [system] (:)=end_of_file
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _416538)
^  Call: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _416538)
^  Unify: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _416538)
^  Call: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _455646)
^  Unify: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _455646)
   Call: (271) [system] peek_char((0x55aefe44e2f0), _457512)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] is_delimiter(' ')
^  Unify: (271) [user] is_delimiter(' ')
   Call: (272) [system] char_type(' ', space)
   Exit: (272) [system] char_type(' ', space)
^  Exit: (271) [user] is_delimiter(' ')
   Call: (271) [system] _455646=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (270) [user] classify_and_convert_charseq(:, [], _416538)
^  Unify: (270) [user] classify_and_convert_charseq(:, [], _416538)
^  Call: (272) [system] setup_call_cleanup('$notrace'(_468678, _468680), once(user:catch(read_from_chars([:], _416538), _468654, fail)), '$restore_trace'(_468678, _468680))
^  Unify: (272) [system] setup_call_cleanup(system:'$notrace'(_468678, _468680), system:once(user:catch(read_from_chars([:], _416538), _468654, fail)), system:'$restore_trace'(_468678, _468680))
^  Call: (273) [system] sig_atomic(system:'$notrace'(_468678, _468680))
^  Exit: (272) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([:], :), _468654, fail)), system:'$restore_trace'(3, -1))
   Call: (271) [system] atomic(:)
   Exit: (271) [system] atomic(:)
^  Exit: (270) [user] classify_and_convert_charseq(:, [], :)
^  Exit: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, :)
^  Exit: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), :)
^  Call: (268) [user] read_list(')', (0x55aefe44e2f0), _477116)
^  Unify: (268) [user] read_list(')', (0x55aefe44e2f0), _477116)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _480830)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (270) [system] ' '=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(' ')
^  Unify: (270) [user] is_like_space(' ')
   Call: (271) [system] char_type(' ', 'white')
   Exit: (271) [system] char_type(' ', 'white')
^  Exit: (270) [user] is_like_space(' ')
   Call: (270) [system] get_char((0x55aefe44e2f0), _489488)
   Exit: (270) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _493116)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), u)
   Call: (271) [system] u=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(u)
^  Unify: (271) [user] is_like_space(u)
   Call: (272) [system] char_type(u, 'white')
^  Redo: (271) [user] is_like_space(u)
^  Unify: (271) [user] is_like_space(u)
   Call: (272) [system] char_type(u, end_of_line)
^  Redo: (271) [user] is_like_space(u)
^  Unify: (271) [user] is_like_space(u)
   Call: (272) [system] char_type(u, space)
^  Redo: (271) [user] is_like_space(u)
^  Unify: (271) [user] is_like_space(u)
   Call: (272) [system] char_type(u, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _510824)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), u)
   Call: (269) [system] u=')'
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _477116)
   Call: (269) [system] u=end_of_file
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _477116)
^  Call: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _516402)
^  Unify: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _516402)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _520116)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), u)
   Call: (271) [system] u=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(u)
^  Unify: (271) [user] is_like_space(u)
   Call: (272) [system] char_type(u, 'white')
^  Redo: (271) [user] is_like_space(u)
^  Unify: (271) [user] is_like_space(u)
   Call: (272) [system] char_type(u, end_of_line)
^  Redo: (271) [user] is_like_space(u)
^  Unify: (271) [user] is_like_space(u)
   Call: (272) [system] char_type(u, space)
^  Redo: (271) [user] is_like_space(u)
^  Unify: (271) [user] is_like_space(u)
   Call: (272) [system] char_type(u, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] get_char((0x55aefe44e2f0), _18886)
   Exit: (270) [system] get_char((0x55aefe44e2f0), u)
   Call: (270) [system] u='('
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5986)
   Call: (270) [system] u='['
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5986)
   Call: (270) [system] u='{'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5986)
   Call: (270) [system] u='"'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5986)
   Call: (270) [system] u=!
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5986)
   Call: (270) [system] u='\''
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5986)
   Call: (270) [system] u='`'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5986)
   Call: (270) [system] u=end_of_file
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5986)
^  Call: (270) [user] read_symbolic(')', (0x55aefe44e2f0), u, _5986)
^  Unify: (270) [user] read_symbolic(')', (0x55aefe44e2f0), u, _5986)
^  Call: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _37496)
^  Unify: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _37496)
   Call: (272) [system] peek_char((0x55aefe44e2f0), _39362)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (272) [user] is_delimiter(n)
^  Unify: (272) [user] is_delimiter(n)
   Call: (273) [system] char_type(n, space)
^  Redo: (272) [user] is_delimiter(n)
   Call: (273) [system] arg(_45002, v('(', ')', end_of_file), n)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _37496)
   Call: (272) [system] ')'==n
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _37496)
   Call: (272) [system] get_char((0x55aefe44e2f0), n)
   Exit: (272) [system] get_char((0x55aefe44e2f0), n)
   Call: (272) [system] n=(\)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _37496)
^  Call: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _52368)
^  Unify: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _52368)
   Call: (273) [system] peek_char((0x55aefe44e2f0), _54234)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (273) [user] is_delimiter(i)
^  Unify: (273) [user] is_delimiter(i)
   Call: (274) [system] char_type(i, space)
^  Redo: (273) [user] is_delimiter(i)
   Call: (274) [system] arg(_59874, v('(', ')', end_of_file), i)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _52368)
   Call: (273) [system] ')'==i
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _52368)
   Call: (273) [system] get_char((0x55aefe44e2f0), i)
   Exit: (273) [system] get_char((0x55aefe44e2f0), i)
   Call: (273) [system] i=(\)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _52368)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _67240)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _67240)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _69106)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), f)
^  Call: (274) [user] is_delimiter(f)
^  Unify: (274) [user] is_delimiter(f)
   Call: (275) [system] char_type(f, space)
^  Redo: (274) [user] is_delimiter(f)
   Call: (275) [system] arg(_74746, v('(', ')', end_of_file), f)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _67240)
   Call: (274) [system] ')'==f
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _67240)
   Call: (274) [system] get_char((0x55aefe44e2f0), f)
   Exit: (274) [system] get_char((0x55aefe44e2f0), f)
   Call: (274) [system] f=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _67240)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _82112)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _82112)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _83978)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), y)
^  Call: (275) [user] is_delimiter(y)
^  Unify: (275) [user] is_delimiter(y)
   Call: (276) [system] char_type(y, space)
^  Redo: (275) [user] is_delimiter(y)
   Call: (276) [system] arg(_89618, v('(', ')', end_of_file), y)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _82112)
   Call: (275) [system] ')'==y
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _82112)
   Call: (275) [system] get_char((0x55aefe44e2f0), y)
   Exit: (275) [system] get_char((0x55aefe44e2f0), y)
   Call: (275) [system] y=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _82112)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _96984)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _96984)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _98850)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] is_delimiter(' ')
^  Unify: (276) [user] is_delimiter(' ')
   Call: (277) [system] char_type(' ', space)
   Exit: (277) [system] char_type(' ', space)
^  Exit: (276) [user] is_delimiter(' ')
   Call: (276) [system] _96984=[]
   Exit: (276) [system] []=[]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (275) [system] _82112=[y]
   Exit: (275) [system] [y]=[y]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [y])
   Call: (274) [system] _67240=[f, y]
   Exit: (274) [system] [f, y]=[f, y]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [f, y])
   Call: (273) [system] _52368=[i, f, y]
   Exit: (273) [system] [i, f, y]=[i, f, y]
^  Exit: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, f, y])
   Call: (272) [system] _37496=[n, i, f, y]
   Exit: (272) [system] [n, i, f, y]=[n, i, f, y]
^  Exit: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n, i, f, y])
^  Call: (271) [user] classify_and_convert_charseq(u, [n, i, f, y], _5986)
^  Unify: (271) [user] classify_and_convert_charseq(u, [n, i, f, y], _5986)
^  Call: (273) [system] setup_call_cleanup('$notrace'(_121192, _121194), once(user:catch(read_from_chars([u, n, i, f, y], _5986), _121168, fail)), '$restore_trace'(_121192, _121194))
^  Unify: (273) [system] setup_call_cleanup(system:'$notrace'(_121192, _121194), system:once(user:catch(read_from_chars([u, n, i, f, y], _5986), _121168, fail)), system:'$restore_trace'(_121192, _121194))
^  Call: (274) [system] sig_atomic(system:'$notrace'(_121192, _121194))
^  Exit: (273) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([u, n, i, f, y], unify), _121168, fail)), system:'$restore_trace'(3, -1))
   Call: (272) [system] atomic(unify)
   Exit: (272) [system] atomic(unify)
^  Exit: (271) [user] classify_and_convert_charseq(u, [n, i, f, y], unify)
^  Exit: (270) [user] read_symbolic(')', (0x55aefe44e2f0), u, unify)
^  Exit: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), unify)
^  Call: (269) [user] read_list(')', (0x55aefe44e2f0), _129630)
^  Unify: (269) [user] read_list(')', (0x55aefe44e2f0), _129630)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _133344)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (271) [system] ' '=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(' ')
^  Unify: (271) [user] is_like_space(' ')
   Call: (272) [system] char_type(' ', 'white')
   Exit: (272) [system] char_type(' ', 'white')
^  Exit: (271) [user] is_like_space(' ')
   Call: (271) [system] get_char((0x55aefe44e2f0), _142002)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _145630)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _163338)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (270) [system] '('=')'
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _129630)
   Call: (270) [system] '('=end_of_file
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _129630)
^  Call: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _168916)
^  Unify: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _168916)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _172630)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] get_char((0x55aefe44e2f0), _189414)
   Exit: (271) [system] get_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('='('
   Exit: (271) [system] '('='('
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _168916)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _168916)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _196840)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, 'white')
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, end_of_line)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, space)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _213624)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), -)
   Call: (272) [system] (-)=')'
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _168916)
   Call: (272) [system] (-)=end_of_file
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _168916)
^  Call: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _219202)
^  Unify: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _219202)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _222916)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, 'white')
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, end_of_line)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, space)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] get_char((0x55aefe44e2f0), _239700)
   Exit: (273) [system] get_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)='('
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _219202)
   Call: (273) [system] (-)='['
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _219202)
   Call: (273) [system] (-)='{'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _219202)
   Call: (273) [system] (-)='"'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _219202)
   Call: (273) [system] (-)=!
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _219202)
   Call: (273) [system] (-)='\''
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _219202)
   Call: (273) [system] (-)='`'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _219202)
   Call: (273) [system] (-)=end_of_file
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _219202)
^  Call: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _219202)
^  Unify: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _219202)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _258310)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _258310)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _260176)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), >)
^  Call: (275) [user] is_delimiter(>)
^  Unify: (275) [user] is_delimiter(>)
   Call: (276) [system] char_type(>, space)
^  Redo: (275) [user] is_delimiter(>)
   Call: (276) [system] arg(_265816, v('(', ')', end_of_file), >)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _258310)
   Call: (275) [system] ')'==(>)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _258310)
   Call: (275) [system] get_char((0x55aefe44e2f0), >)
   Exit: (275) [system] get_char((0x55aefe44e2f0), >)
   Call: (275) [system] (>)=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _258310)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _273182)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _273182)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _275048)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] is_delimiter(' ')
^  Unify: (276) [user] is_delimiter(' ')
   Call: (277) [system] char_type(' ', space)
   Exit: (277) [system] char_type(' ', space)
^  Exit: (276) [user] is_delimiter(' ')
   Call: (276) [system] _273182=[]
   Exit: (276) [system] []=[]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (275) [system] _258310=[>]
   Exit: (275) [system] [>]=[>]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [>])
^  Call: (274) [user] classify_and_convert_charseq(-, [>], _219202)
^  Unify: (274) [user] classify_and_convert_charseq(-, [>], _219202)
^  Call: (276) [system] setup_call_cleanup('$notrace'(_289008, _289010), once(user:catch(read_from_chars([-, >], _219202), _288984, fail)), '$restore_trace'(_289008, _289010))
^  Unify: (276) [system] setup_call_cleanup(system:'$notrace'(_289008, _289010), system:once(user:catch(read_from_chars([-, >], _219202), _288984, fail)), system:'$restore_trace'(_289008, _289010))
^  Call: (277) [system] sig_atomic(system:'$notrace'(_289008, _289010))
^  Exit: (276) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([-, >], ->), _288984, fail)), system:'$restore_trace'(3, -1))
   Call: (275) [system] atomic(->)
   Exit: (275) [system] atomic(->)
^  Exit: (274) [user] classify_and_convert_charseq(-, [>], ->)
^  Exit: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, ->)
^  Exit: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), ->)
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _297446)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _297446)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _301160)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (274) [system] ' '=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(' ')
^  Unify: (274) [user] is_like_space(' ')
   Call: (275) [system] char_type(' ', 'white')
   Exit: (275) [system] char_type(' ', 'white')
^  Exit: (274) [user] is_like_space(' ')
   Call: (274) [system] get_char((0x55aefe44e2f0), _309818)
   Exit: (274) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _313446)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', 'white')
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', end_of_line)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', space)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _331154)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (273) [system] 'A'=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _297446)
   Call: (273) [system] 'A'=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _297446)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _336732)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _336732)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _340446)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', 'white')
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', end_of_line)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', space)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _357230)
   Exit: (274) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (274) [system] 'A'='('
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _336732)
   Call: (274) [system] 'A'='['
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _336732)
   Call: (274) [system] 'A'='{'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _336732)
   Call: (274) [system] 'A'='"'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _336732)
   Call: (274) [system] 'A'=!
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _336732)
   Call: (274) [system] 'A'='\''
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _336732)
   Call: (274) [system] 'A'='`'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _336732)
   Call: (274) [system] 'A'=end_of_file
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _336732)
^  Call: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _336732)
^  Unify: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _336732)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _375840)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _375840)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _377706)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (276) [user] is_delimiter(t)
^  Unify: (276) [user] is_delimiter(t)
   Call: (277) [system] char_type(t, space)
^  Redo: (276) [user] is_delimiter(t)
   Call: (277) [system] arg(_383346, v('(', ')', end_of_file), t)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _375840)
   Call: (276) [system] ')'==t
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _375840)
   Call: (276) [system] get_char((0x55aefe44e2f0), t)
   Exit: (276) [system] get_char((0x55aefe44e2f0), t)
   Call: (276) [system] t=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _375840)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _390712)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _390712)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _392578)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (277) [user] is_delimiter(o)
^  Unify: (277) [user] is_delimiter(o)
   Call: (278) [system] char_type(o, space)
^  Redo: (277) [user] is_delimiter(o)
   Call: (278) [system] arg(_398218, v('(', ')', end_of_file), o)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _390712)
   Call: (277) [system] ')'==o
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _390712)
   Call: (277) [system] get_char((0x55aefe44e2f0), o)
   Exit: (277) [system] get_char((0x55aefe44e2f0), o)
   Call: (277) [system] o=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _390712)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _405584)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _405584)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _407450)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (278) [user] is_delimiter(m)
^  Unify: (278) [user] is_delimiter(m)
   Call: (279) [system] char_type(m, space)
^  Redo: (278) [user] is_delimiter(m)
   Call: (279) [system] arg(_413090, v('(', ')', end_of_file), m)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _405584)
   Call: (278) [system] ')'==m
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _405584)
   Call: (278) [system] get_char((0x55aefe44e2f0), m)
   Exit: (278) [system] get_char((0x55aefe44e2f0), m)
   Call: (278) [system] m=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _405584)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _420456)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _420456)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _422322)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (279) [user] is_delimiter(' ')
^  Unify: (279) [user] is_delimiter(' ')
   Call: (280) [system] char_type(' ', space)
   Exit: (280) [system] char_type(' ', space)
^  Exit: (279) [user] is_delimiter(' ')
   Call: (279) [system] _420456=[]
   Exit: (279) [system] []=[]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (278) [system] _405584=[m]
   Exit: (278) [system] [m]=[m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (277) [system] _390712=[o, m]
   Exit: (277) [system] [o, m]=[o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (276) [system] _375840=[t, o, m]
   Exit: (276) [system] [t, o, m]=[t, o, m]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (275) [user] classify_and_convert_charseq('A', [t, o, m], _336732)
^  Unify: (275) [user] classify_and_convert_charseq('A', [t, o, m], _336732)
^  Call: (277) [system] setup_call_cleanup('$notrace'(_441870, _441872), once(user:catch(read_from_chars(['A', t, o, m], _336732), _441846, fail)), '$restore_trace'(_441870, _441872))
^  Unify: (277) [system] setup_call_cleanup(system:'$notrace'(_441870, _441872), system:once(user:catch(read_from_chars(['A', t, o, m], _336732), _441846, fail)), system:'$restore_trace'(_441870, _441872))
^  Call: (278) [system] sig_atomic(system:'$notrace'(_441870, _441872))
^  Exit: (277) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _336732), _441846, fail)), system:'$restore_trace'(3, -1))
   Call: (276) [system] atomic(_336732)
^  Redo: (275) [user] classify_and_convert_charseq('A', [t, o, m], _336732)
^  Unify: (275) [user] classify_and_convert_charseq('A', [t, o, m], _336732)
   Call: (276) [system] atom_chars(_336732, ['A', t, o, m])
   Exit: (276) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (275) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (273) [user] read_list(')', (0x55aefe44e2f0), _453124)
^  Unify: (273) [user] read_list(')', (0x55aefe44e2f0), _453124)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _456838)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (275) [system] ' '=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(' ')
^  Unify: (275) [user] is_like_space(' ')
   Call: (276) [system] char_type(' ', 'white')
   Exit: (276) [system] char_type(' ', 'white')
^  Exit: (275) [user] is_like_space(' ')
   Call: (275) [system] get_char((0x55aefe44e2f0), _465496)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _469124)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _486832)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (274) [system] 'A'=')'
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _453124)
   Call: (274) [system] 'A'=end_of_file
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _453124)
^  Call: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _492410)
^  Unify: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _492410)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _496124)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] get_char((0x55aefe44e2f0), _512908)
   Exit: (275) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'='('
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _492410)
   Call: (275) [system] 'A'='['
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _492410)
   Call: (275) [system] 'A'='{'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _492410)
   Call: (275) [system] 'A'='"'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _492410)
   Call: (275) [system] 'A'=!
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _492410)
   Call: (275) [system] 'A'='\''
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _6010)
   Call: (275) [system] 'A'='`'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _6010)
   Call: (275) [system] 'A'=end_of_file
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _6010)
^  Call: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _6010)
^  Unify: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _6010)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _13424)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _13424)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _15290)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (277) [user] is_delimiter(t)
^  Unify: (277) [user] is_delimiter(t)
   Call: (278) [system] char_type(t, space)
^  Redo: (277) [user] is_delimiter(t)
   Call: (278) [system] arg(_20930, v('(', ')', end_of_file), t)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _13424)
   Call: (277) [system] ')'==t
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _13424)
   Call: (277) [system] get_char((0x55aefe44e2f0), t)
   Exit: (277) [system] get_char((0x55aefe44e2f0), t)
   Call: (277) [system] t=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _13424)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _28296)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _28296)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _30162)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (278) [user] is_delimiter(o)
^  Unify: (278) [user] is_delimiter(o)
   Call: (279) [system] char_type(o, space)
^  Redo: (278) [user] is_delimiter(o)
   Call: (279) [system] arg(_35802, v('(', ')', end_of_file), o)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _28296)
   Call: (278) [system] ')'==o
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _28296)
   Call: (278) [system] get_char((0x55aefe44e2f0), o)
   Exit: (278) [system] get_char((0x55aefe44e2f0), o)
   Call: (278) [system] o=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _28296)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _43168)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _43168)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _45034)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (279) [user] is_delimiter(m)
^  Unify: (279) [user] is_delimiter(m)
   Call: (280) [system] char_type(m, space)
^  Redo: (279) [user] is_delimiter(m)
   Call: (280) [system] arg(_50674, v('(', ')', end_of_file), m)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _43168)
   Call: (279) [system] ')'==m
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _43168)
   Call: (279) [system] get_char((0x55aefe44e2f0), m)
   Exit: (279) [system] get_char((0x55aefe44e2f0), m)
   Call: (279) [system] m=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _43168)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _58040)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _58040)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _59906)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (280) [user] is_delimiter(' ')
^  Unify: (280) [user] is_delimiter(' ')
   Call: (281) [system] char_type(' ', space)
   Exit: (281) [system] char_type(' ', space)
^  Exit: (280) [user] is_delimiter(' ')
   Call: (280) [system] _58040=[]
   Exit: (280) [system] []=[]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (279) [system] _43168=[m]
   Exit: (279) [system] [m]=[m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (278) [system] _28296=[o, m]
   Exit: (278) [system] [o, m]=[o, m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (277) [system] _13424=[t, o, m]
   Exit: (277) [system] [t, o, m]=[t, o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (276) [user] classify_and_convert_charseq('A', [t, o, m], _6010)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _6010)
^  Call: (278) [system] setup_call_cleanup('$notrace'(_79454, _79456), once(user:catch(read_from_chars(['A', t, o, m], _6010), _79430, fail)), '$restore_trace'(_79454, _79456))
^  Unify: (278) [system] setup_call_cleanup(system:'$notrace'(_79454, _79456), system:once(user:catch(read_from_chars(['A', t, o, m], _6010), _79430, fail)), system:'$restore_trace'(_79454, _79456))
^  Call: (279) [system] sig_atomic(system:'$notrace'(_79454, _79456))
^  Exit: (278) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _6010), _79430, fail)), system:'$restore_trace'(3, -1))
   Call: (277) [system] atomic(_6010)
^  Redo: (276) [user] classify_and_convert_charseq('A', [t, o, m], _6010)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _6010)
   Call: (277) [system] atom_chars(_6010, ['A', t, o, m])
   Exit: (277) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (276) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _90708)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _90708)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _94422)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (276) [system] ' '=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(' ')
^  Unify: (276) [user] is_like_space(' ')
   Call: (277) [system] char_type(' ', 'white')
   Exit: (277) [system] char_type(' ', 'white')
^  Exit: (276) [user] is_like_space(' ')
   Call: (276) [system] get_char((0x55aefe44e2f0), _103080)
   Exit: (276) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _106708)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (277) [system] 'A'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', 'white')
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', end_of_line)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', space)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _124416)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=')'
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _90708)
   Call: (275) [system] 'A'=end_of_file
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _90708)
^  Call: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _129994)
^  Unify: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _129994)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _133708)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (277) [system] 'A'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', 'white')
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', end_of_line)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', space)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] get_char((0x55aefe44e2f0), _150492)
   Exit: (276) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'='('
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _129994)
   Call: (276) [system] 'A'='['
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _129994)
   Call: (276) [system] 'A'='{'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _129994)
   Call: (276) [system] 'A'='"'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _129994)
   Call: (276) [system] 'A'=!
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _129994)
   Call: (276) [system] 'A'='\''
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _129994)
   Call: (276) [system] 'A'='`'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _129994)
   Call: (276) [system] 'A'=end_of_file
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _129994)
^  Call: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _129994)
^  Unify: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _129994)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169102)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169102)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _170968)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (278) [user] is_delimiter(t)
^  Unify: (278) [user] is_delimiter(t)
   Call: (279) [system] char_type(t, space)
^  Redo: (278) [user] is_delimiter(t)
   Call: (279) [system] arg(_176608, v('(', ')', end_of_file), t)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169102)
   Call: (278) [system] ')'==t
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169102)
   Call: (278) [system] get_char((0x55aefe44e2f0), t)
   Exit: (278) [system] get_char((0x55aefe44e2f0), t)
   Call: (278) [system] t=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169102)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _183974)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _183974)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _185840)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (279) [user] is_delimiter(o)
^  Unify: (279) [user] is_delimiter(o)
   Call: (280) [system] char_type(o, space)
^  Redo: (279) [user] is_delimiter(o)
   Call: (280) [system] arg(_191480, v('(', ')', end_of_file), o)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _183974)
   Call: (279) [system] ')'==o
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _183974)
   Call: (279) [system] get_char((0x55aefe44e2f0), o)
   Exit: (279) [system] get_char((0x55aefe44e2f0), o)
   Call: (279) [system] o=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _183974)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _198846)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _198846)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _200712)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (280) [user] is_delimiter(m)
^  Unify: (280) [user] is_delimiter(m)
   Call: (281) [system] char_type(m, space)
^  Redo: (280) [user] is_delimiter(m)
   Call: (281) [system] arg(_206352, v('(', ')', end_of_file), m)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _198846)
   Call: (280) [system] ')'==m
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _198846)
   Call: (280) [system] get_char((0x55aefe44e2f0), m)
   Exit: (280) [system] get_char((0x55aefe44e2f0), m)
   Call: (280) [system] m=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _198846)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _213718)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _213718)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _215584)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (281) [user] is_delimiter(' ')
^  Unify: (281) [user] is_delimiter(' ')
   Call: (282) [system] char_type(' ', space)
   Exit: (282) [system] char_type(' ', space)
^  Exit: (281) [user] is_delimiter(' ')
   Call: (281) [system] _213718=[]
   Exit: (281) [system] []=[]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (280) [system] _198846=[m]
   Exit: (280) [system] [m]=[m]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (279) [system] _183974=[o, m]
   Exit: (279) [system] [o, m]=[o, m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (278) [system] _169102=[t, o, m]
   Exit: (278) [system] [t, o, m]=[t, o, m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (277) [user] classify_and_convert_charseq('A', [t, o, m], _129994)
^  Unify: (277) [user] classify_and_convert_charseq('A', [t, o, m], _129994)
^  Call: (279) [system] setup_call_cleanup('$notrace'(_235132, _235134), once(user:catch(read_from_chars(['A', t, o, m], _129994), _235108, fail)), '$restore_trace'(_235132, _235134))
^  Unify: (279) [system] setup_call_cleanup(system:'$notrace'(_235132, _235134), system:once(user:catch(read_from_chars(['A', t, o, m], _129994), _235108, fail)), system:'$restore_trace'(_235132, _235134))
^  Call: (280) [system] sig_atomic(system:'$notrace'(_235132, _235134))
^  Exit: (279) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _129994), _235108, fail)), system:'$restore_trace'(3, -1))
   Call: (278) [system] atomic(_129994)
^  Redo: (277) [user] classify_and_convert_charseq('A', [t, o, m], _129994)
^  Unify: (277) [user] classify_and_convert_charseq('A', [t, o, m], _129994)
   Call: (278) [system] atom_chars(_129994, ['A', t, o, m])
   Exit: (278) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (277) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (275) [user] read_list(')', (0x55aefe44e2f0), _246386)
^  Unify: (275) [user] read_list(')', (0x55aefe44e2f0), _246386)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _250100)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (277) [system] ' '=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space(' ')
^  Unify: (277) [user] is_like_space(' ')
   Call: (278) [system] char_type(' ', 'white')
   Exit: (278) [system] char_type(' ', 'white')
^  Exit: (277) [user] is_like_space(' ')
   Call: (277) [system] get_char((0x55aefe44e2f0), _258758)
   Exit: (277) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _262386)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (278) [system] 'A'=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', 'white')
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', end_of_line)
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', space)
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', cntrl)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _280094)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=')'
^  Redo: (275) [user] read_list(')', (0x55aefe44e2f0), _246386)
   Call: (276) [system] 'A'=end_of_file
^  Redo: (275) [user] read_list(')', (0x55aefe44e2f0), _246386)
^  Call: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _285672)
^  Unify: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _285672)
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _289386)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (278) [system] 'A'=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', 'white')
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', end_of_line)
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', space)
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', cntrl)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] get_char((0x55aefe44e2f0), _306170)
   Exit: (277) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (277) [system] 'A'='('
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _285672)
   Call: (277) [system] 'A'='['
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _285672)
   Call: (277) [system] 'A'='{'
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _285672)
   Call: (277) [system] 'A'='"'
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _285672)
   Call: (277) [system] 'A'=!
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _285672)
   Call: (277) [system] 'A'='\''
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _285672)
   Call: (277) [system] 'A'='`'
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _285672)
   Call: (277) [system] 'A'=end_of_file
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _285672)
^  Call: (277) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _285672)
^  Unify: (277) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _285672)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _324780)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _324780)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _326646)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (279) [user] is_delimiter(t)
^  Unify: (279) [user] is_delimiter(t)
   Call: (280) [system] char_type(t, space)
^  Redo: (279) [user] is_delimiter(t)
   Call: (280) [system] arg(_332286, v('(', ')', end_of_file), t)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _324780)
   Call: (279) [system] ')'==t
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _324780)
   Call: (279) [system] get_char((0x55aefe44e2f0), t)
   Exit: (279) [system] get_char((0x55aefe44e2f0), t)
   Call: (279) [system] t=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _324780)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _339652)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _339652)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _341518)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (280) [user] is_delimiter(o)
^  Unify: (280) [user] is_delimiter(o)
   Call: (281) [system] char_type(o, space)
^  Redo: (280) [user] is_delimiter(o)
   Call: (281) [system] arg(_347158, v('(', ')', end_of_file), o)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _339652)
   Call: (280) [system] ')'==o
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _339652)
   Call: (280) [system] get_char((0x55aefe44e2f0), o)
   Exit: (280) [system] get_char((0x55aefe44e2f0), o)
   Call: (280) [system] o=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _339652)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _354524)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _354524)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _356390)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (281) [user] is_delimiter(m)
^  Unify: (281) [user] is_delimiter(m)
   Call: (282) [system] char_type(m, space)
^  Redo: (281) [user] is_delimiter(m)
   Call: (282) [system] arg(_362030, v('(', ')', end_of_file), m)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _354524)
   Call: (281) [system] ')'==m
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _354524)
   Call: (281) [system] get_char((0x55aefe44e2f0), m)
   Exit: (281) [system] get_char((0x55aefe44e2f0), m)
   Call: (281) [system] m=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _354524)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _369396)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _369396)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _371262)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (282) [user] is_delimiter(' ')
^  Unify: (282) [user] is_delimiter(' ')
   Call: (283) [system] char_type(' ', space)
   Exit: (283) [system] char_type(' ', space)
^  Exit: (282) [user] is_delimiter(' ')
   Call: (282) [system] _369396=[]
   Exit: (282) [system] []=[]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (281) [system] _354524=[m]
   Exit: (281) [system] [m]=[m]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (280) [system] _339652=[o, m]
   Exit: (280) [system] [o, m]=[o, m]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (279) [system] _324780=[t, o, m]
   Exit: (279) [system] [t, o, m]=[t, o, m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (278) [user] classify_and_convert_charseq('A', [t, o, m], _285672)
^  Unify: (278) [user] classify_and_convert_charseq('A', [t, o, m], _285672)
^  Call: (280) [system] setup_call_cleanup('$notrace'(_390810, _390812), once(user:catch(read_from_chars(['A', t, o, m], _285672), _390786, fail)), '$restore_trace'(_390810, _390812))
^  Unify: (280) [system] setup_call_cleanup(system:'$notrace'(_390810, _390812), system:once(user:catch(read_from_chars(['A', t, o, m], _285672), _390786, fail)), system:'$restore_trace'(_390810, _390812))
^  Call: (281) [system] sig_atomic(system:'$notrace'(_390810, _390812))
^  Exit: (280) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _285672), _390786, fail)), system:'$restore_trace'(3, -1))
   Call: (279) [system] atomic(_285672)
^  Redo: (278) [user] classify_and_convert_charseq('A', [t, o, m], _285672)
^  Unify: (278) [user] classify_and_convert_charseq('A', [t, o, m], _285672)
   Call: (279) [system] atom_chars(_285672, ['A', t, o, m])
   Exit: (279) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (278) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (277) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (276) [user] read_list(')', (0x55aefe44e2f0), _402064)
^  Unify: (276) [user] read_list(')', (0x55aefe44e2f0), _402064)
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _405778)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (278) [system] ' '=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space(' ')
^  Unify: (278) [user] is_like_space(' ')
   Call: (279) [system] char_type(' ', 'white')
   Exit: (279) [system] char_type(' ', 'white')
^  Exit: (278) [user] is_like_space(' ')
   Call: (278) [system] get_char((0x55aefe44e2f0), _414436)
   Exit: (278) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _418064)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (279) [system] 'A'=(;)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', 'white')
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', end_of_line)
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', space)
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', cntrl)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _435772)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (277) [system] 'A'=')'
^  Redo: (276) [user] read_list(')', (0x55aefe44e2f0), _402064)
   Call: (277) [system] 'A'=end_of_file
^  Redo: (276) [user] read_list(')', (0x55aefe44e2f0), _402064)
^  Call: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _441350)
^  Unify: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _441350)
^  Call: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _445064)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (279) [system] 'A'=(;)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', 'white')
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', end_of_line)
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', space)
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', cntrl)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] get_char((0x55aefe44e2f0), _461848)
   Exit: (278) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (278) [system] 'A'='('
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _441350)
   Call: (278) [system] 'A'='['
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _441350)
   Call: (278) [system] 'A'='{'
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _441350)
   Call: (278) [system] 'A'='"'
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _441350)
   Call: (278) [system] 'A'=!
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _441350)
   Call: (278) [system] 'A'='\''
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _441350)
   Call: (278) [system] 'A'='`'
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _441350)
   Call: (278) [system] 'A'=end_of_file
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _441350)
^  Call: (278) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _441350)
^  Unify: (278) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _441350)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _480458)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _480458)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _482324)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (280) [user] is_delimiter(t)
^  Unify: (280) [user] is_delimiter(t)
   Call: (281) [system] char_type(t, space)
^  Redo: (280) [user] is_delimiter(t)
   Call: (281) [system] arg(_487964, v('(', ')', end_of_file), t)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _480458)
   Call: (280) [system] ')'==t
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _480458)
   Call: (280) [system] get_char((0x55aefe44e2f0), t)
   Exit: (280) [system] get_char((0x55aefe44e2f0), t)
   Call: (280) [system] t=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _480458)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _495330)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _495330)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _497196)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (281) [user] is_delimiter(o)
^  Unify: (281) [user] is_delimiter(o)
   Call: (282) [system] char_type(o, space)
^  Redo: (281) [user] is_delimiter(o)
   Call: (282) [system] arg(_502836, v('(', ')', end_of_file), o)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _495330)
   Call: (281) [system] ')'==o
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _495330)
   Call: (281) [system] get_char((0x55aefe44e2f0), o)
   Exit: (281) [system] get_char((0x55aefe44e2f0), o)
   Call: (281) [system] o=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _495330)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _510202)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _510202)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _512068)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (282) [user] is_delimiter(m)
^  Unify: (282) [user] is_delimiter(m)
   Call: (283) [system] char_type(m, space)
^  Redo: (282) [user] is_delimiter(m)
   Call: (283) [system] arg(_517708, v('(', ')', end_of_file), m)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _510202)
   Call: (282) [system] ')'==m
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _510202)
   Call: (282) [system] get_char((0x55aefe44e2f0), m)
   Exit: (282) [system] get_char((0x55aefe44e2f0), m)
   Call: (282) [system] m=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6040)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6942)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6942)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _8808)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (283) [user] is_delimiter(')')
^  Unify: (283) [user] is_delimiter(')')
   Call: (284) [system] char_type(')', space)
^  Redo: (283) [user] is_delimiter(')')
   Call: (284) [system] arg(_14448, v('(', ')', end_of_file), ')')
   Exit: (284) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (283) [user] is_delimiter(')')
   Call: (283) [system] _6942=[]
   Exit: (283) [system] []=[]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (282) [system] _6040=[m]
   Exit: (282) [system] [m]=[m]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (281) [system] _6036=[o, m]
   Exit: (281) [system] [o, m]=[o, m]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (280) [system] _6032=[t, o, m]
   Exit: (280) [system] [t, o, m]=[t, o, m]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (279) [user] classify_and_convert_charseq('A', [t, o, m], _6028)
^  Unify: (279) [user] classify_and_convert_charseq('A', [t, o, m], _6028)
^  Call: (281) [system] setup_call_cleanup('$notrace'(_30224, _30226), once(user:catch(read_from_chars(['A', t, o, m], _6028), _30200, fail)), '$restore_trace'(_30224, _30226))
^  Unify: (281) [system] setup_call_cleanup(system:'$notrace'(_30224, _30226), system:once(user:catch(read_from_chars(['A', t, o, m], _6028), _30200, fail)), system:'$restore_trace'(_30224, _30226))
^  Call: (282) [system] sig_atomic(system:'$notrace'(_30224, _30226))
^  Exit: (281) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _6028), _30200, fail)), system:'$restore_trace'(3, -1))
   Call: (280) [system] atomic(_6028)
^  Redo: (279) [user] classify_and_convert_charseq('A', [t, o, m], _6028)
^  Unify: (279) [user] classify_and_convert_charseq('A', [t, o, m], _6028)
   Call: (280) [system] atom_chars(_6028, ['A', t, o, m])
   Exit: (280) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (279) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (278) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (277) [user] read_list(')', (0x55aefe44e2f0), _41478)
^  Unify: (277) [user] read_list(')', (0x55aefe44e2f0), _41478)
^  Call: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _45192)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (279) [system] ')'=(;)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (279) [user] is_like_space(')')
^  Unify: (279) [user] is_like_space(')')
   Call: (280) [system] char_type(')', 'white')
^  Redo: (279) [user] is_like_space(')')
^  Unify: (279) [user] is_like_space(')')
   Call: (280) [system] char_type(')', end_of_line)
^  Redo: (279) [user] is_like_space(')')
^  Unify: (279) [user] is_like_space(')')
   Call: (280) [system] char_type(')', space)
^  Redo: (279) [user] is_like_space(')')
^  Unify: (279) [user] is_like_space(')')
   Call: (280) [system] char_type(')', cntrl)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _61976)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (278) [system] ')'=')'
   Exit: (278) [system] ')'=')'
   Call: (278) [system] get_char((0x55aefe44e2f0), _65766)
   Exit: (278) [system] get_char((0x55aefe44e2f0), ')')
   Call: (278) [system] _41478=[]
   Exit: (278) [system] []=[]
^  Exit: (277) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (277) [system] _6024=['Atom']
   Exit: (277) [system] ['Atom']=['Atom']
^  Exit: (276) [user] read_list(')', (0x55aefe44e2f0), ['Atom'])
   Call: (276) [system] _6018=['Atom', 'Atom']
   Exit: (276) [system] ['Atom', 'Atom']=['Atom', 'Atom']
^  Exit: (275) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Atom'])
   Call: (275) [system] _6012=['Atom', 'Atom', 'Atom']
   Exit: (275) [system] ['Atom', 'Atom', 'Atom']=['Atom', 'Atom', 'Atom']
^  Exit: (274) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Atom', 'Atom'])
   Call: (274) [system] _6006=['Atom', 'Atom', 'Atom', 'Atom']
   Exit: (274) [system] ['Atom', 'Atom', 'Atom', 'Atom']=['Atom', 'Atom', 'Atom', 'Atom']
^  Exit: (273) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Atom', 'Atom', 'Atom'])
   Call: (273) [system] _6000=['Atom', 'Atom', 'Atom', 'Atom', 'Atom']
   Exit: (273) [system] ['Atom', 'Atom', 'Atom', 'Atom', 'Atom']=['Atom', 'Atom', 'Atom', 'Atom', 'Atom']
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Atom', 'Atom', 'Atom', 'Atom'])
   Call: (272) [system] _5992=[->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']
   Exit: (272) [system] [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']=[->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'])
^  Exit: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'])
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _88030)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _88030)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _91744)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (272) [system] ')'=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', 'white')
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', end_of_line)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', space)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _108528)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (271) [system] ')'=')'
   Exit: (271) [system] ')'=')'
   Call: (271) [system] get_char((0x55aefe44e2f0), _112318)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ')')
   Call: (271) [system] _88030=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (270) [system] _5988=[[->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]
   Exit: (270) [system] [[->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]=[[->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]
^  Exit: (269) [user] read_list(')', (0x55aefe44e2f0), [[->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
   Call: (269) [system] _5982=[unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]
   Exit: (269) [system] [unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]=[unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]
^  Exit: (268) [user] read_list(')', (0x55aefe44e2f0), [unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
   Call: (268) [system] _5942=[:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]
   Exit: (268) [system] [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]=[:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]
^  Exit: (267) [user] read_list(')', (0x55aefe44e2f0), [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (265) [user] read_sexpr((0x55aefe44e2f0), [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Call: (265) [user] assertz(metta_file_comment(9, 0, 198, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], '$stream_position'(198, 9, 0, 198)))
^  Exit: (265) [user] assertz(metta_file_comment(9, 0, 198, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], '$stream_position'(198, 9, 0, 198)))
^  Exit: (263) [system] once(user:(read_position((0x55aefe44e2f0), 9, 0, 198, '$stream_position'(198, 9, 0, 198)), read_sexpr((0x55aefe44e2f0), [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]), assertz(metta_file_comment(9, 0, 198, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], '$stream_position'(198, 9, 0, 198)))))
   Call: (263) [system] fail
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Call: (263) [user] retract(metta_file_comment(_132692, _132694, _132696, _132698, _132700))
^  Exit: (263) [user] retract(metta_file_comment(9, 0, 198, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], '$stream_position'(198, 9, 0, 198)))
^  Call: (263) [user] trly(untyped_to_metta, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _5908)
^  Call: (264) [user] once(call(untyped_to_metta, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _136496))
^  Unify: (264) [system] once(user:call(untyped_to_metta, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _136496))
^  Call: (265) [user] call(untyped_to_metta, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _136496)
^  Unify: (265) [system] call(user:untyped_to_metta, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _136496)
^  Call: (266) [user] untyped_to_metta([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _136496)
^  Unify: (266) [user] untyped_to_metta([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _136496)
^  Call: (267) [user] must_det_ll(trly(mfix_vars1, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _142108))
^  Unify: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _142108))
^  Call: (268) [user] once(user:trly(mfix_vars1, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _142108))
^  Unify: (268) [system] once(user:trly(mfix_vars1, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _142108))
^  Call: (269) [user] trly(mfix_vars1, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _142108)
^  Unify: (269) [user] trly(mfix_vars1, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _142108)
^  Call: (270) [user] once(call(mfix_vars1, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694))
^  Unify: (270) [system] once(user:call(mfix_vars1, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694))
^  Call: (271) [user] call(mfix_vars1, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694)
^  Unify: (271) [system] call(user:mfix_vars1, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694)
^  Call: (272) [user] mfix_vars1([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694)
^  Unify: (272) [user] mfix_vars1([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694)
   Call: (273) [system] var([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Redo: (272) [user] mfix_vars1([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694)
^  Unify: (272) [user] mfix_vars1([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], '$VAR'(_155154))
   Call: (273) [system] atom([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Redo: (272) [user] mfix_vars1([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694)
^  Unify: (272) [user] mfix_vars1([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694)
   Call: (273) [system] [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]==true
^  Redo: (272) [user] mfix_vars1([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694)
^  Unify: (272) [user] mfix_vars1([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694)
   Call: (273) [system] [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]==false
^  Redo: (272) [user] mfix_vars1([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694)
^  Unify: (272) [user] mfix_vars1([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694)
   Call: (273) [system] (:)=='['
^  Redo: (272) [user] mfix_vars1([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694)
^  Unify: (272) [user] mfix_vars1([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694)
   Call: (273) [system] (:)=='{'
^  Redo: (272) [user] mfix_vars1([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694)
^  Unify: (272) [user] mfix_vars1([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694)
   Call: (273) [system] is_list([unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
   Exit: (273) [system] is_list([unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
   Call: (273) [lists] lists:last([unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _171848)
   Unify: (273) [lists] lists:last([unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _171848)
   Call: (274) [lists] lists:last_([[->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], unify, _171848)
   Unify: (274) [lists] lists:last_([[->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], unify, _171848)
   Call: (275) [lists] lists:last_([], [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _171848)
   Unify: (275) [lists] lists:last_([], [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'])
   Exit: (275) [lists] lists:last_([], [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'])
   Exit: (274) [lists] lists:last_([[->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'])
   Exit: (273) [lists] lists:last([unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'])
   Call: (273) [system] [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']=='}'
^  Redo: (272) [user] mfix_vars1([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694)
^  Unify: (272) [user] mfix_vars1([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694)
   Call: (273) [system] [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]==[_183012, _183018]
^  Redo: (272) [user] mfix_vars1([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694)
^  Unify: (272) [user] mfix_vars1([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694)
   Call: (273) [system] fail
^  Redo: (272) [user] mfix_vars1([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694)
^  Unify: (272) [user] mfix_vars1([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694)
   Call: (273) [system] is_list([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
   Exit: (273) [system] is_list([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Call: (273) [user] apply:maplist(mfix_vars1, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694)
^  Unify: (273) [apply] apply:maplist(user:mfix_vars1, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694)
   Call: (274) [apply] apply:maplist_([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _147694, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [_193242|_193244], user:mfix_vars1)
^  Call: (275) [user] mfix_vars1(:, _193242)
^  Unify: (275) [user] mfix_vars1(:, _193242)
   Call: (276) [system] var(:)
^  Redo: (275) [user] mfix_vars1(:, _193242)
^  Unify: (275) [user] mfix_vars1(:, '$VAR'(_197888))
   Call: (276) [system] atom(:)
   Exit: (276) [system] atom(:)
^  Call: (276) [user] symbol_concat($, _200666, :)
^  Unify: (276) [user] symbol_concat($, _200666, :)
   Call: (277) [system] atom_concat($, _200666, :)
   Fail: (277) [system] atom_concat($, _200666, :)
^  Fail: (276) [user] symbol_concat($, _200666, :)
^  Redo: (275) [user] mfix_vars1(:, _193242)
^  Unify: (275) [user] mfix_vars1(:, _193242)
   Call: (276) [system] (:)==true
^  Redo: (275) [user] mfix_vars1(:, _193242)
^  Unify: (275) [user] mfix_vars1(:, _193242)
   Call: (276) [system] (:)==false
^  Redo: (275) [user] mfix_vars1(:, _193242)
^  Unify: (275) [user] mfix_vars1(:, _193242)
   Call: (276) [system] (:)==[_212754, _212760]
^  Redo: (275) [user] mfix_vars1(:, _193242)
^  Unify: (275) [user] mfix_vars1(:, _193242)
   Call: (276) [system] is_list(:)
^  Redo: (275) [user] mfix_vars1(:, _193242)
^  Unify: (275) [user] mfix_vars1(:, _193242)
   Call: (276) [system] string(:)
^  Redo: (275) [user] mfix_vars1(:, _193242)
^  Unify: (275) [user] mfix_vars1(:, _193242)
   Call: (276) [system] compound(:)
^  Redo: (275) [user] mfix_vars1(:, _193242)
^  Unify: (275) [user] mfix_vars1(:, _193242)
^  Call: (276) [user] symbol(:)
^  Unify: (276) [user] symbol(:)
   Call: (277) [system] atom(:)
   Exit: (277) [system] atom(:)
^  Exit: (276) [user] symbol(:)
^  Unify: (275) [user] mfix_vars1(:, :)
^  Exit: (275) [user] mfix_vars1(:, :)
   Call: (275) [apply] apply:maplist_([unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _193244, user:mfix_vars1)
   Unify: (275) [apply] apply:maplist_([unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [_231298|_231300], user:mfix_vars1)
^  Call: (276) [user] mfix_vars1(unify, _231298)
^  Unify: (276) [user] mfix_vars1(unify, _231298)
   Call: (277) [system] var(unify)
^  Redo: (276) [user] mfix_vars1(unify, _231298)
^  Unify: (276) [user] mfix_vars1(unify, '$VAR'(_235944))
   Call: (277) [system] atom(unify)
   Exit: (277) [system] atom(unify)
^  Call: (277) [user] symbol_concat($, _238722, unify)
^  Unify: (277) [user] symbol_concat($, _238722, unify)
   Call: (278) [system] atom_concat($, _238722, unify)
   Fail: (278) [system] atom_concat($, _238722, unify)
^  Fail: (277) [user] symbol_concat($, _238722, unify)
^  Redo: (276) [user] mfix_vars1(unify, _231298)
^  Unify: (276) [user] mfix_vars1(unify, _231298)
   Call: (277) [system] unify==true
^  Redo: (276) [user] mfix_vars1(unify, _231298)
^  Unify: (276) [user] mfix_vars1(unify, _231298)
   Call: (277) [system] unify==false
^  Redo: (276) [user] mfix_vars1(unify, _231298)
^  Unify: (276) [user] mfix_vars1(unify, _231298)
   Call: (277) [system] unify==[_250810, _250816]
^  Redo: (276) [user] mfix_vars1(unify, _231298)
^  Unify: (276) [user] mfix_vars1(unify, _231298)
   Call: (277) [system] is_list(unify)
^  Redo: (276) [user] mfix_vars1(unify, _231298)
^  Unify: (276) [user] mfix_vars1(unify, _231298)
   Call: (277) [system] string(unify)
^  Redo: (276) [user] mfix_vars1(unify, _231298)
^  Unify: (276) [user] mfix_vars1(unify, _231298)
   Call: (277) [system] compound(unify)
^  Redo: (276) [user] mfix_vars1(unify, _231298)
^  Unify: (276) [user] mfix_vars1(unify, _231298)
^  Call: (277) [user] symbol(unify)
^  Unify: (277) [user] symbol(unify)
   Call: (278) [system] atom(unify)
   Exit: (278) [system] atom(unify)
^  Exit: (277) [user] symbol(unify)
^  Unify: (276) [user] mfix_vars1(unify, unify)
^  Exit: (276) [user] mfix_vars1(unify, unify)
   Call: (276) [apply] apply:maplist_([[->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _231300, user:mfix_vars1)
   Unify: (276) [apply] apply:maplist_([[->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [_269354|_269356], user:mfix_vars1)
^  Call: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _269354)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _269354)
   Call: (278) [system] var([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'])
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _269354)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], '$VAR'(_274000))
   Call: (278) [system] atom([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'])
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _269354)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _269354)
   Call: (278) [system] [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']==true
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _269354)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _269354)
   Call: (278) [system] [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']==false
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _269354)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _269354)
   Call: (278) [system] (->)=='['
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _269354)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _269354)
   Call: (278) [system] (->)=='{'
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _269354)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _269354)
   Call: (278) [system] is_list(['Atom', 'Atom', 'Atom', 'Atom', 'Atom'])
   Exit: (278) [system] is_list(['Atom', 'Atom', 'Atom', 'Atom', 'Atom'])
   Call: (278) [lists] lists:last(['Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _290694)
   Unify: (278) [lists] lists:last(['Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _290694)
   Call: (279) [lists] lists:last_(['Atom', 'Atom', 'Atom', 'Atom'], 'Atom', _290694)
   Unify: (279) [lists] lists:last_(['Atom', 'Atom', 'Atom', 'Atom'], 'Atom', _290694)
   Call: (280) [lists] lists:last_(['Atom', 'Atom', 'Atom'], 'Atom', _290694)
   Unify: (280) [lists] lists:last_(['Atom', 'Atom', 'Atom'], 'Atom', _290694)
   Call: (281) [lists] lists:last_(['Atom', 'Atom'], 'Atom', _290694)
   Unify: (281) [lists] lists:last_(['Atom', 'Atom'], 'Atom', _290694)
   Call: (282) [lists] lists:last_(['Atom'], 'Atom', _290694)
   Unify: (282) [lists] lists:last_(['Atom'], 'Atom', _290694)
   Call: (283) [lists] lists:last_([], 'Atom', _290694)
   Unify: (283) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (283) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (282) [lists] lists:last_(['Atom'], 'Atom', 'Atom')
   Exit: (281) [lists] lists:last_(['Atom', 'Atom'], 'Atom', 'Atom')
   Exit: (280) [lists] lists:last_(['Atom', 'Atom', 'Atom'], 'Atom', 'Atom')
   Exit: (279) [lists] lists:last_(['Atom', 'Atom', 'Atom', 'Atom'], 'Atom', 'Atom')
   Exit: (278) [lists] lists:last(['Atom', 'Atom', 'Atom', 'Atom', 'Atom'], 'Atom')
   Call: (278) [system] 'Atom'=='}'
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _269354)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _269354)
   Call: (278) [system] [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']==[_310246, _310252]
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _269354)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _269354)
   Call: (278) [system] fail
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _269354)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _269354)
   Call: (278) [system] is_list([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'])
   Exit: (278) [system] is_list([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'])
^  Call: (278) [user] apply:maplist(mfix_vars1, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _269354)
^  Unify: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _269354)
   Call: (279) [apply] apply:maplist_([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _269354, user:mfix_vars1)
   Unify: (279) [apply] apply:maplist_([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], [_320476|_320478], user:mfix_vars1)
^  Call: (280) [user] mfix_vars1(->, _320476)
^  Unify: (280) [user] mfix_vars1(->, _320476)
   Call: (281) [system] var(->)
^  Redo: (280) [user] mfix_vars1(->, _320476)
^  Unify: (280) [user] mfix_vars1(->, '$VAR'(_325122))
   Call: (281) [system] atom(->)
   Exit: (281) [system] atom(->)
^  Call: (281) [user] symbol_concat($, _327900, ->)
^  Unify: (281) [user] symbol_concat($, _327900, ->)
   Call: (282) [system] atom_concat($, _327900, ->)
   Fail: (282) [system] atom_concat($, _327900, ->)
^  Fail: (281) [user] symbol_concat($, _327900, ->)
^  Redo: (280) [user] mfix_vars1(->, _320476)
^  Unify: (280) [user] mfix_vars1(->, _320476)
   Call: (281) [system] (->)==true
^  Redo: (280) [user] mfix_vars1(->, _320476)
^  Unify: (280) [user] mfix_vars1(->, _320476)
   Call: (281) [system] (->)==false
^  Redo: (280) [user] mfix_vars1(->, _320476)
^  Unify: (280) [user] mfix_vars1(->, _320476)
   Call: (281) [system] (->)==[_339988, _339994]
^  Redo: (280) [user] mfix_vars1(->, _320476)
^  Unify: (280) [user] mfix_vars1(->, _320476)
   Call: (281) [system] is_list(->)
^  Redo: (280) [user] mfix_vars1(->, _320476)
^  Unify: (280) [user] mfix_vars1(->, _320476)
   Call: (281) [system] string(->)
^  Redo: (280) [user] mfix_vars1(->, _320476)
^  Unify: (280) [user] mfix_vars1(->, _320476)
   Call: (281) [system] compound(->)
^  Redo: (280) [user] mfix_vars1(->, _320476)
^  Unify: (280) [user] mfix_vars1(->, _320476)
^  Call: (281) [user] symbol(->)
^  Unify: (281) [user] symbol(->)
   Call: (282) [system] atom(->)
   Exit: (282) [system] atom(->)
^  Exit: (281) [user] symbol(->)
^  Unify: (280) [user] mfix_vars1(->, ->)
^  Exit: (280) [user] mfix_vars1(->, ->)
   Call: (280) [apply] apply:maplist_(['Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _320478, user:mfix_vars1)
   Unify: (280) [apply] apply:maplist_(['Atom', 'Atom', 'Atom', 'Atom', 'Atom'], [_358532|_358534], user:mfix_vars1)
^  Call: (281) [user] mfix_vars1('Atom', _358532)
^  Unify: (281) [user] mfix_vars1('Atom', _358532)
   Call: (282) [system] var('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _358532)
^  Unify: (281) [user] mfix_vars1('Atom', '$VAR'(_363178))
   Call: (282) [system] atom('Atom')
   Exit: (282) [system] atom('Atom')
^  Call: (282) [user] symbol_concat($, _365956, 'Atom')
^  Unify: (282) [user] symbol_concat($, _365956, 'Atom')
   Call: (283) [system] atom_concat($, _365956, 'Atom')
   Fail: (283) [system] atom_concat($, _365956, 'Atom')
^  Fail: (282) [user] symbol_concat($, _365956, 'Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _358532)
^  Unify: (281) [user] mfix_vars1('Atom', _358532)
   Call: (282) [system] 'Atom'==true
^  Redo: (281) [user] mfix_vars1('Atom', _358532)
^  Unify: (281) [user] mfix_vars1('Atom', _358532)
   Call: (282) [system] 'Atom'==false
^  Redo: (281) [user] mfix_vars1('Atom', _358532)
^  Unify: (281) [user] mfix_vars1('Atom', _358532)
   Call: (282) [system] 'Atom'==[_378044, _378050]
^  Redo: (281) [user] mfix_vars1('Atom', _358532)
^  Unify: (281) [user] mfix_vars1('Atom', _358532)
   Call: (282) [system] is_list('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _358532)
^  Unify: (281) [user] mfix_vars1('Atom', _358532)
   Call: (282) [system] string('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _358532)
^  Unify: (281) [user] mfix_vars1('Atom', _358532)
   Call: (282) [system] compound('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _358532)
^  Unify: (281) [user] mfix_vars1('Atom', _358532)
^  Call: (282) [user] symbol('Atom')
^  Unify: (282) [user] symbol('Atom')
   Call: (283) [system] atom('Atom')
   Exit: (283) [system] atom('Atom')
^  Exit: (282) [user] symbol('Atom')
^  Unify: (281) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (281) [user] mfix_vars1('Atom', 'Atom')
   Call: (281) [apply] apply:maplist_(['Atom', 'Atom', 'Atom', 'Atom'], _358534, user:mfix_vars1)
   Unify: (281) [apply] apply:maplist_(['Atom', 'Atom', 'Atom', 'Atom'], [_396588|_396590], user:mfix_vars1)
^  Call: (282) [user] mfix_vars1('Atom', _396588)
^  Unify: (282) [user] mfix_vars1('Atom', _396588)
   Call: (283) [system] var('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _396588)
^  Unify: (282) [user] mfix_vars1('Atom', '$VAR'(_401234))
   Call: (283) [system] atom('Atom')
   Exit: (283) [system] atom('Atom')
^  Call: (283) [user] symbol_concat($, _404012, 'Atom')
^  Unify: (283) [user] symbol_concat($, _404012, 'Atom')
   Call: (284) [system] atom_concat($, _404012, 'Atom')
   Fail: (284) [system] atom_concat($, _404012, 'Atom')
^  Fail: (283) [user] symbol_concat($, _404012, 'Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _396588)
^  Unify: (282) [user] mfix_vars1('Atom', _396588)
   Call: (283) [system] 'Atom'==true
^  Redo: (282) [user] mfix_vars1('Atom', _396588)
^  Unify: (282) [user] mfix_vars1('Atom', _396588)
   Call: (283) [system] 'Atom'==false
^  Redo: (282) [user] mfix_vars1('Atom', _396588)
^  Unify: (282) [user] mfix_vars1('Atom', _396588)
   Call: (283) [system] 'Atom'==[_416100, _416106]
^  Redo: (282) [user] mfix_vars1('Atom', _396588)
^  Unify: (282) [user] mfix_vars1('Atom', _396588)
   Call: (283) [system] is_list('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _396588)
^  Unify: (282) [user] mfix_vars1('Atom', _396588)
   Call: (283) [system] string('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _396588)
^  Unify: (282) [user] mfix_vars1('Atom', _396588)
   Call: (283) [system] compound('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _396588)
^  Unify: (282) [user] mfix_vars1('Atom', _396588)
^  Call: (283) [user] symbol('Atom')
^  Unify: (283) [user] symbol('Atom')
   Call: (284) [system] atom('Atom')
   Exit: (284) [system] atom('Atom')
^  Exit: (283) [user] symbol('Atom')
^  Unify: (282) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (282) [user] mfix_vars1('Atom', 'Atom')
   Call: (282) [apply] apply:maplist_(['Atom', 'Atom', 'Atom'], _396590, user:mfix_vars1)
   Unify: (282) [apply] apply:maplist_(['Atom', 'Atom', 'Atom'], [_434644|_434646], user:mfix_vars1)
^  Call: (283) [user] mfix_vars1('Atom', _434644)
^  Unify: (283) [user] mfix_vars1('Atom', _434644)
   Call: (284) [system] var('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _434644)
^  Unify: (283) [user] mfix_vars1('Atom', '$VAR'(_439290))
   Call: (284) [system] atom('Atom')
   Exit: (284) [system] atom('Atom')
^  Call: (284) [user] symbol_concat($, _442068, 'Atom')
^  Unify: (284) [user] symbol_concat($, _442068, 'Atom')
   Call: (285) [system] atom_concat($, _442068, 'Atom')
   Fail: (285) [system] atom_concat($, _442068, 'Atom')
^  Fail: (284) [user] symbol_concat($, _442068, 'Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _434644)
^  Unify: (283) [user] mfix_vars1('Atom', _434644)
   Call: (284) [system] 'Atom'==true
^  Redo: (283) [user] mfix_vars1('Atom', _434644)
^  Unify: (283) [user] mfix_vars1('Atom', _434644)
   Call: (284) [system] 'Atom'==false
^  Redo: (283) [user] mfix_vars1('Atom', _434644)
^  Unify: (283) [user] mfix_vars1('Atom', _434644)
   Call: (284) [system] 'Atom'==[_454156, _454162]
^  Redo: (283) [user] mfix_vars1('Atom', _434644)
^  Unify: (283) [user] mfix_vars1('Atom', _434644)
   Call: (284) [system] is_list('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _434644)
^  Unify: (283) [user] mfix_vars1('Atom', _434644)
   Call: (284) [system] string('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _434644)
^  Unify: (283) [user] mfix_vars1('Atom', _434644)
   Call: (284) [system] compound('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _434644)
^  Unify: (283) [user] mfix_vars1('Atom', _434644)
^  Call: (284) [user] symbol('Atom')
^  Unify: (284) [user] symbol('Atom')
   Call: (285) [system] atom('Atom')
   Exit: (285) [system] atom('Atom')
^  Exit: (284) [user] symbol('Atom')
^  Unify: (283) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (283) [user] mfix_vars1('Atom', 'Atom')
   Call: (283) [apply] apply:maplist_(['Atom', 'Atom'], _434646, user:mfix_vars1)
   Unify: (283) [apply] apply:maplist_(['Atom', 'Atom'], [_472700|_472702], user:mfix_vars1)
^  Call: (284) [user] mfix_vars1('Atom', _472700)
^  Unify: (284) [user] mfix_vars1('Atom', _472700)
   Call: (285) [system] var('Atom')
^  Redo: (284) [user] mfix_vars1('Atom', _472700)
^  Unify: (284) [user] mfix_vars1('Atom', '$VAR'(_477346))
   Call: (285) [system] atom('Atom')
   Exit: (285) [system] atom('Atom')
^  Call: (285) [user] symbol_concat($, _480124, 'Atom')
^  Unify: (285) [user] symbol_concat($, _480124, 'Atom')
   Call: (286) [system] atom_concat($, _480124, 'Atom')
   Fail: (286) [system] atom_concat($, _480124, 'Atom')
^  Fail: (285) [user] symbol_concat($, _480124, 'Atom')
^  Redo: (284) [user] mfix_vars1('Atom', _472700)
^  Unify: (284) [user] mfix_vars1('Atom', _472700)
   Call: (285) [system] 'Atom'==true
^  Redo: (284) [user] mfix_vars1('Atom', _472700)
^  Unify: (284) [user] mfix_vars1('Atom', _472700)
   Call: (285) [system] 'Atom'==false
^  Redo: (284) [user] mfix_vars1('Atom', _472700)
^  Unify: (284) [user] mfix_vars1('Atom', _472700)
   Call: (285) [system] 'Atom'==[_492212, _492218]
^  Redo: (284) [user] mfix_vars1('Atom', _472700)
^  Unify: (284) [user] mfix_vars1('Atom', _472700)
   Call: (285) [system] is_list('Atom')
^  Redo: (284) [user] mfix_vars1('Atom', _472700)
^  Unify: (284) [user] mfix_vars1('Atom', _472700)
   Call: (285) [system] string('Atom')
^  Redo: (284) [user] mfix_vars1('Atom', _472700)
^  Unify: (284) [user] mfix_vars1('Atom', _472700)
   Call: (285) [system] compound('Atom')
^  Redo: (284) [user] mfix_vars1('Atom', _472700)
^  Unify: (284) [user] mfix_vars1('Atom', _472700)
^  Call: (285) [user] symbol('Atom')
^  Unify: (285) [user] symbol('Atom')
   Call: (286) [system] atom('Atom')
   Exit: (286) [system] atom('Atom')
^  Exit: (285) [user] symbol('Atom')
^  Unify: (284) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (284) [user] mfix_vars1('Atom', 'Atom')
   Call: (284) [apply] apply:maplist_(['Atom'], _472702, user:mfix_vars1)
   Unify: (284) [apply] apply:maplist_(['Atom'], [_510756|_510758], user:mfix_vars1)
^  Call: (285) [user] mfix_vars1('Atom', _510756)
^  Unify: (285) [user] mfix_vars1('Atom', _510756)
   Call: (286) [system] var('Atom')
^  Redo: (285) [user] mfix_vars1('Atom', _510756)
^  Unify: (285) [user] mfix_vars1('Atom', '$VAR'(_515402))
   Call: (286) [system] atom('Atom')
   Exit: (286) [system] atom('Atom')
^  Call: (286) [user] symbol_concat($, _518180, 'Atom')
^  Unify: (286) [user] symbol_concat($, _518180, 'Atom')
   Call: (287) [system] atom_concat($, _518180, 'Atom')
   Fail: (287) [system] atom_concat($, _518180, 'Atom')
^  Fail: (286) [user] symbol_concat($, _518180, 'Atom')
^  Redo: (285) [user] mfix_vars1('Atom', _510756)
^  Unify: (285) [user] mfix_vars1('Atom', _6084)
   Call: (286) [system] 'Atom'==true
^  Redo: (285) [user] mfix_vars1('Atom', _6084)
^  Unify: (285) [user] mfix_vars1('Atom', _6084)
   Call: (286) [system] 'Atom'==false
^  Redo: (285) [user] mfix_vars1('Atom', _6084)
^  Unify: (285) [user] mfix_vars1('Atom', _6084)
   Call: (286) [system] 'Atom'==[_12406, _12412]
^  Redo: (285) [user] mfix_vars1('Atom', _6084)
^  Unify: (285) [user] mfix_vars1('Atom', _6084)
   Call: (286) [system] is_list('Atom')
^  Redo: (285) [user] mfix_vars1('Atom', _6084)
^  Unify: (285) [user] mfix_vars1('Atom', _6084)
   Call: (286) [system] string('Atom')
^  Redo: (285) [user] mfix_vars1('Atom', _6084)
^  Unify: (285) [user] mfix_vars1('Atom', _6084)
   Call: (286) [system] compound('Atom')
^  Redo: (285) [user] mfix_vars1('Atom', _6084)
^  Unify: (285) [user] mfix_vars1('Atom', _6084)
^  Call: (286) [user] symbol('Atom')
^  Unify: (286) [user] symbol('Atom')
   Call: (287) [system] atom('Atom')
   Exit: (287) [system] atom('Atom')
^  Exit: (286) [user] symbol('Atom')
^  Unify: (285) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (285) [user] mfix_vars1('Atom', 'Atom')
   Call: (285) [apply] apply:maplist_([], _6086, user:mfix_vars1)
   Unify: (285) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (285) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (284) [apply] apply:maplist_(['Atom'], ['Atom'], user:mfix_vars1)
   Exit: (283) [apply] apply:maplist_(['Atom', 'Atom'], ['Atom', 'Atom'], user:mfix_vars1)
   Exit: (282) [apply] apply:maplist_(['Atom', 'Atom', 'Atom'], ['Atom', 'Atom', 'Atom'], user:mfix_vars1)
   Exit: (281) [apply] apply:maplist_(['Atom', 'Atom', 'Atom', 'Atom'], ['Atom', 'Atom', 'Atom', 'Atom'], user:mfix_vars1)
   Exit: (280) [apply] apply:maplist_(['Atom', 'Atom', 'Atom', 'Atom', 'Atom'], ['Atom', 'Atom', 'Atom', 'Atom', 'Atom'], user:mfix_vars1)
   Exit: (279) [apply] apply:maplist_([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], user:mfix_vars1)
^  Exit: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'])
^  Exit: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'])
   Call: (277) [apply] apply:maplist_([], _6044, user:mfix_vars1)
   Unify: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (276) [apply] apply:maplist_([[->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [[->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (275) [apply] apply:maplist_([unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], user:mfix_vars1)
^  Exit: (273) [apply] apply:maplist(user:mfix_vars1, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (272) [user] mfix_vars1([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (271) [system] call(user:mfix_vars1, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (270) [system] once(user:call(mfix_vars1, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]))
   Call: (270) [system] [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]\=@=[:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]
^  Redo: (269) [user] trly(mfix_vars1, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _5994)
^  Unify: (269) [user] trly(mfix_vars1, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (269) [user] trly(mfix_vars1, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (268) [system] once(user:trly(mfix_vars1, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_c, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _55180))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_c, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _55180))
^  Call: (268) [user] once(user:trly(cons_to_c, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _55180))
^  Unify: (268) [system] once(user:trly(cons_to_c, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _55180))
^  Call: (269) [user] trly(cons_to_c, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _55180)
^  Unify: (269) [user] trly(cons_to_c, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _55180)
^  Call: (270) [user] once(call(cons_to_c, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _60766))
^  Unify: (270) [system] once(user:call(cons_to_c, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _60766))
^  Call: (271) [user] call(cons_to_c, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _60766)
^  Unify: (271) [system] call(user:cons_to_c, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _60766)
^  Call: (272) [user] cons_to_c([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _60766)
^  Unify: (272) [user] cons_to_c([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_c([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (271) [system] call(user:cons_to_c, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (270) [system] once(user:call(cons_to_c, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]))
   Call: (270) [system] [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]\=@=[:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]
^  Redo: (269) [user] trly(cons_to_c, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _55180)
^  Unify: (269) [user] trly(cons_to_c, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (269) [user] trly(cons_to_c, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (268) [system] once(user:trly(cons_to_c, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_c, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_l, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _5974))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_l, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _5974))
^  Call: (268) [user] once(user:trly(cons_to_l, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _5974))
^  Unify: (268) [system] once(user:trly(cons_to_l, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _5974))
^  Call: (269) [user] trly(cons_to_l, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _5974)
^  Unify: (269) [user] trly(cons_to_l, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _5974)
^  Call: (270) [user] once(call(cons_to_l, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _83086))
^  Unify: (270) [system] once(user:call(cons_to_l, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _83086))
^  Call: (271) [user] call(cons_to_l, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _83086)
^  Unify: (271) [system] call(user:cons_to_l, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _83086)
^  Call: (272) [user] cons_to_l([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _83086)
^  Unify: (272) [user] cons_to_l([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_l([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (271) [system] call(user:cons_to_l, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (270) [system] once(user:call(cons_to_l, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]))
   Call: (270) [system] [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]\=@=[:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]
^  Redo: (269) [user] trly(cons_to_l, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _5974)
^  Unify: (269) [user] trly(cons_to_l, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (269) [user] trly(cons_to_l, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (268) [system] once(user:trly(cons_to_l, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_l, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]))
^  Exit: (266) [user] untyped_to_metta([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (265) [system] call(user:untyped_to_metta, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (264) [system] once(user:call(untyped_to_metta, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]))
   Call: (264) [system] [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]\=@=[:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']]
^  Redo: (263) [user] trly(untyped_to_metta, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (263) [user] trly(untyped_to_metta, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
   Call: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])))
   Unify: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])))
   Exit: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])))
^  Exit: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Call: (257) [user] subst_vars([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _117394, [], _117396)
^  Unify: (257) [user] subst_vars([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [], [])
   Call: (258) [system] var([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Redo: (257) [user] subst_vars([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _117394, [], _117396)
^  Unify: (257) [user] subst_vars([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [_121132|_121134], [], _117396)
^  Call: (258) [user] subst_vars(:, _121132, [], _122072)
^  Unify: (258) [user] subst_vars(:, :, [], [])
   Call: (259) [system] var(:)
^  Redo: (258) [user] subst_vars(:, _121132, [], _122072)
^  Unify: (258) [user] subst_vars(:, _121132, [], _122072)
   Call: (259) [system] atom(:)
   Exit: (259) [system] atom(:)
^  Call: (259) [user] symbol_concat($, _128590, :)
^  Unify: (259) [user] symbol_concat($, _128590, :)
   Call: (260) [system] atom_concat($, _128590, :)
   Fail: (260) [system] atom_concat($, _128590, :)
^  Fail: (259) [user] symbol_concat($, _128590, :)
^  Redo: (258) [user] subst_vars(:, _121132, [], _122072)
^  Unify: (258) [user] subst_vars(:, _121132, [], _122072)
   Call: (259) [system] compound(:)
^  Redo: (258) [user] subst_vars(:, _121132, [], _122072)
^  Unify: (258) [user] subst_vars(:, :, [], [])
^  Exit: (258) [user] subst_vars(:, :, [], [])
^  Call: (258) [user] subst_vars([unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _121134, [], _117396)
^  Unify: (258) [user] subst_vars([unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [], [])
   Call: (259) [system] var([unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Redo: (258) [user] subst_vars([unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _121134, [], _117396)
^  Unify: (258) [user] subst_vars([unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [_142590|_142592], [], _117396)
^  Call: (259) [user] subst_vars(unify, _142590, [], _143530)
^  Unify: (259) [user] subst_vars(unify, unify, [], [])
   Call: (260) [system] var(unify)
^  Redo: (259) [user] subst_vars(unify, _142590, [], _143530)
^  Unify: (259) [user] subst_vars(unify, _142590, [], _143530)
   Call: (260) [system] atom(unify)
   Exit: (260) [system] atom(unify)
^  Call: (260) [user] symbol_concat($, _150048, unify)
^  Unify: (260) [user] symbol_concat($, _150048, unify)
   Call: (261) [system] atom_concat($, _150048, unify)
   Fail: (261) [system] atom_concat($, _150048, unify)
^  Fail: (260) [user] symbol_concat($, _150048, unify)
^  Redo: (259) [user] subst_vars(unify, _142590, [], _143530)
^  Unify: (259) [user] subst_vars(unify, _142590, [], _143530)
   Call: (260) [system] compound(unify)
^  Redo: (259) [user] subst_vars(unify, _142590, [], _143530)
^  Unify: (259) [user] subst_vars(unify, unify, [], [])
^  Exit: (259) [user] subst_vars(unify, unify, [], [])
^  Call: (259) [user] subst_vars([[->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _142592, [], _117396)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [[->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [], [])
   Call: (260) [system] var([[->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']])
^  Redo: (259) [user] subst_vars([[->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], _142592, [], _117396)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [_164048|_164050], [], _117396)
^  Call: (260) [user] subst_vars([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _164048, [], _164988)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], [], [])
   Call: (261) [system] var([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'])
^  Redo: (260) [user] subst_vars([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _164048, [], _164988)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], [_168724|_168726], [], _164988)
^  Call: (261) [user] subst_vars(->, _168724, [], _169664)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
   Call: (262) [system] var(->)
^  Redo: (261) [user] subst_vars(->, _168724, [], _169664)
^  Unify: (261) [user] subst_vars(->, _168724, [], _169664)
   Call: (262) [system] atom(->)
   Exit: (262) [system] atom(->)
^  Call: (262) [user] symbol_concat($, _176182, ->)
^  Unify: (262) [user] symbol_concat($, _176182, ->)
   Call: (263) [system] atom_concat($, _176182, ->)
   Fail: (263) [system] atom_concat($, _176182, ->)
^  Fail: (262) [user] symbol_concat($, _176182, ->)
^  Redo: (261) [user] subst_vars(->, _168724, [], _169664)
^  Unify: (261) [user] subst_vars(->, _168724, [], _169664)
   Call: (262) [system] compound(->)
^  Redo: (261) [user] subst_vars(->, _168724, [], _169664)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
^  Exit: (261) [user] subst_vars(->, ->, [], [])
^  Call: (261) [user] subst_vars(['Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _168726, [], _164988)
^  Unify: (261) [user] subst_vars(['Atom', 'Atom', 'Atom', 'Atom', 'Atom'], ['Atom', 'Atom', 'Atom', 'Atom', 'Atom'], [], [])
   Call: (262) [system] var(['Atom', 'Atom', 'Atom', 'Atom', 'Atom'])
^  Redo: (261) [user] subst_vars(['Atom', 'Atom', 'Atom', 'Atom', 'Atom'], _168726, [], _164988)
^  Unify: (261) [user] subst_vars(['Atom', 'Atom', 'Atom', 'Atom', 'Atom'], [_190182|_190184], [], _164988)
^  Call: (262) [user] subst_vars('Atom', _190182, [], _191122)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (263) [system] var('Atom')
^  Redo: (262) [user] subst_vars('Atom', _190182, [], _191122)
^  Unify: (262) [user] subst_vars('Atom', _190182, [], _191122)
   Call: (263) [system] atom('Atom')
   Exit: (263) [system] atom('Atom')
^  Call: (263) [user] symbol_concat($, _197640, 'Atom')
^  Unify: (263) [user] symbol_concat($, _197640, 'Atom')
   Call: (264) [system] atom_concat($, _197640, 'Atom')
   Fail: (264) [system] atom_concat($, _197640, 'Atom')
^  Fail: (263) [user] symbol_concat($, _197640, 'Atom')
^  Redo: (262) [user] subst_vars('Atom', _190182, [], _191122)
^  Unify: (262) [user] subst_vars('Atom', _190182, [], _191122)
   Call: (263) [system] compound('Atom')
^  Redo: (262) [user] subst_vars('Atom', _190182, [], _191122)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (262) [user] subst_vars(['Atom', 'Atom', 'Atom', 'Atom'], _190184, [], _164988)
^  Unify: (262) [user] subst_vars(['Atom', 'Atom', 'Atom', 'Atom'], ['Atom', 'Atom', 'Atom', 'Atom'], [], [])
   Call: (263) [system] var(['Atom', 'Atom', 'Atom', 'Atom'])
^  Redo: (262) [user] subst_vars(['Atom', 'Atom', 'Atom', 'Atom'], _190184, [], _164988)
^  Unify: (262) [user] subst_vars(['Atom', 'Atom', 'Atom', 'Atom'], [_211640|_211642], [], _164988)
^  Call: (263) [user] subst_vars('Atom', _211640, [], _212580)
^  Unify: (263) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (264) [system] var('Atom')
^  Redo: (263) [user] subst_vars('Atom', _211640, [], _212580)
^  Unify: (263) [user] subst_vars('Atom', _211640, [], _212580)
   Call: (264) [system] atom('Atom')
   Exit: (264) [system] atom('Atom')
^  Call: (264) [user] symbol_concat($, _219098, 'Atom')
^  Unify: (264) [user] symbol_concat($, _219098, 'Atom')
   Call: (265) [system] atom_concat($, _219098, 'Atom')
   Fail: (265) [system] atom_concat($, _219098, 'Atom')
^  Fail: (264) [user] symbol_concat($, _219098, 'Atom')
^  Redo: (263) [user] subst_vars('Atom', _211640, [], _212580)
^  Unify: (263) [user] subst_vars('Atom', _211640, [], _212580)
   Call: (264) [system] compound('Atom')
^  Redo: (263) [user] subst_vars('Atom', _211640, [], _212580)
^  Unify: (263) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (263) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (263) [user] subst_vars(['Atom', 'Atom', 'Atom'], _211642, [], _164988)
^  Unify: (263) [user] subst_vars(['Atom', 'Atom', 'Atom'], ['Atom', 'Atom', 'Atom'], [], [])
   Call: (264) [system] var(['Atom', 'Atom', 'Atom'])
^  Redo: (263) [user] subst_vars(['Atom', 'Atom', 'Atom'], _211642, [], _164988)
^  Unify: (263) [user] subst_vars(['Atom', 'Atom', 'Atom'], [_233098|_233100], [], _164988)
^  Call: (264) [user] subst_vars('Atom', _233098, [], _234038)
^  Unify: (264) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (265) [system] var('Atom')
^  Redo: (264) [user] subst_vars('Atom', _233098, [], _234038)
^  Unify: (264) [user] subst_vars('Atom', _233098, [], _234038)
   Call: (265) [system] atom('Atom')
   Exit: (265) [system] atom('Atom')
^  Call: (265) [user] symbol_concat($, _240556, 'Atom')
^  Unify: (265) [user] symbol_concat($, _240556, 'Atom')
   Call: (266) [system] atom_concat($, _240556, 'Atom')
   Fail: (266) [system] atom_concat($, _240556, 'Atom')
^  Fail: (265) [user] symbol_concat($, _240556, 'Atom')
^  Redo: (264) [user] subst_vars('Atom', _233098, [], _234038)
^  Unify: (264) [user] subst_vars('Atom', _233098, [], _234038)
   Call: (265) [system] compound('Atom')
^  Redo: (264) [user] subst_vars('Atom', _233098, [], _234038)
^  Unify: (264) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (264) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (264) [user] subst_vars(['Atom', 'Atom'], _233100, [], _164988)
^  Unify: (264) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
   Call: (265) [system] var(['Atom', 'Atom'])
^  Redo: (264) [user] subst_vars(['Atom', 'Atom'], _233100, [], _164988)
^  Unify: (264) [user] subst_vars(['Atom', 'Atom'], [_254556|_254558], [], _164988)
^  Call: (265) [user] subst_vars('Atom', _254556, [], _255496)
^  Unify: (265) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (266) [system] var('Atom')
^  Redo: (265) [user] subst_vars('Atom', _254556, [], _255496)
^  Unify: (265) [user] subst_vars('Atom', _254556, [], _255496)
   Call: (266) [system] atom('Atom')
   Exit: (266) [system] atom('Atom')
^  Call: (266) [user] symbol_concat($, _262014, 'Atom')
^  Unify: (266) [user] symbol_concat($, _262014, 'Atom')
   Call: (267) [system] atom_concat($, _262014, 'Atom')
   Fail: (267) [system] atom_concat($, _262014, 'Atom')
^  Fail: (266) [user] symbol_concat($, _262014, 'Atom')
^  Redo: (265) [user] subst_vars('Atom', _254556, [], _255496)
^  Unify: (265) [user] subst_vars('Atom', _254556, [], _255496)
   Call: (266) [system] compound('Atom')
^  Redo: (265) [user] subst_vars('Atom', _254556, [], _255496)
^  Unify: (265) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (265) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (265) [user] subst_vars(['Atom'], _254558, [], _164988)
^  Unify: (265) [user] subst_vars(['Atom'], ['Atom'], [], [])
   Call: (266) [system] var(['Atom'])
^  Redo: (265) [user] subst_vars(['Atom'], _254558, [], _164988)
^  Unify: (265) [user] subst_vars(['Atom'], [_276014|_276016], [], _164988)
^  Call: (266) [user] subst_vars('Atom', _276014, [], _276954)
^  Unify: (266) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (267) [system] var('Atom')
^  Redo: (266) [user] subst_vars('Atom', _276014, [], _276954)
^  Unify: (266) [user] subst_vars('Atom', _276014, [], _276954)
   Call: (267) [system] atom('Atom')
   Exit: (267) [system] atom('Atom')
^  Call: (267) [user] symbol_concat($, _283472, 'Atom')
^  Unify: (267) [user] symbol_concat($, _283472, 'Atom')
   Call: (268) [system] atom_concat($, _283472, 'Atom')
   Fail: (268) [system] atom_concat($, _283472, 'Atom')
^  Fail: (267) [user] symbol_concat($, _283472, 'Atom')
^  Redo: (266) [user] subst_vars('Atom', _276014, [], _276954)
^  Unify: (266) [user] subst_vars('Atom', _276014, [], _276954)
   Call: (267) [system] compound('Atom')
^  Redo: (266) [user] subst_vars('Atom', _276014, [], _276954)
^  Unify: (266) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (266) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (266) [user] subst_vars([], _276016, [], _164988)
^  Unify: (266) [user] subst_vars([], [], [], [])
   Call: (267) [system] var([])
^  Redo: (266) [user] subst_vars([], _276016, [], _164988)
^  Unify: (266) [user] subst_vars([], [], [], [])
^  Exit: (266) [user] subst_vars([], [], [], [])
^  Exit: (265) [user] subst_vars(['Atom'], ['Atom'], [], [])
^  Exit: (264) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
^  Exit: (263) [user] subst_vars(['Atom', 'Atom', 'Atom'], ['Atom', 'Atom', 'Atom'], [], [])
^  Exit: (262) [user] subst_vars(['Atom', 'Atom', 'Atom', 'Atom'], ['Atom', 'Atom', 'Atom', 'Atom'], [], [])
^  Exit: (261) [user] subst_vars(['Atom', 'Atom', 'Atom', 'Atom', 'Atom'], ['Atom', 'Atom', 'Atom', 'Atom', 'Atom'], [], [])
^  Exit: (260) [user] subst_vars([->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom'], [], [])
^  Call: (260) [user] subst_vars([], _164050, [], _117396)
^  Unify: (260) [user] subst_vars([], [], [], [])
   Call: (261) [system] var([])
^  Redo: (260) [user] subst_vars([], _164050, [], _117396)
^  Unify: (260) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([], [], [], [])
^  Exit: (259) [user] subst_vars([[->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [[->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [], [])
^  Exit: (258) [user] subst_vars([unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [], [])
^  Exit: (257) [user] subst_vars([:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [], [])
   Call: (257) [system] _313370=metta_file_buffer(+, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(197, 8, 38, 197))
   Exit: (257) [system] metta_file_buffer(+, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(197, 8, 38, 197))=metta_file_buffer(+, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(197, 8, 38, 197))
^  Call: (257) [user] assertz(metta_file_buffer(+, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(197, 8, 38, 197)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(197, 8, 38, 197)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(197, 8, 38, 197))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(197, 8, 38, 197))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(197, 8, 38, 197))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, unify, [->, 'Atom', 'Atom', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(197, 8, 38, 197))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
   Redo: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _364164)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _365102))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _365102)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 237)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _364164)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _364164)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_364164))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_364164))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_364164))
   Exit: (259) [system] nonvar(position(_364164))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(237, 9, 39, 237)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(237, 9, 39, 237))
   Call: (257) [user] current_read_mode(file, _384582)
   Unify: (257) [user] current_read_mode(file, _384582)
   Call: (258) [system] nb_current(file_mode, _384582)
   Redo: (257) [user] current_read_mode(file, _384582)
   Call: (258) [system] _384582=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _391032)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _391032)
^  Call: (258) [user] clause(t_l:s_reader_info(_391032), _392978, _392900)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _391032)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _391032)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _391032)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _391032)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _391032)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _391032)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _391032)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _391032)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _406808)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (260) [system] char_type('\n', space)
   Exit: (260) [system] char_type('\n', space)
   Call: (260) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (260) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _391032)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _391032)
   Call: (261) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _391032)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _391032)
   Call: (261) [system] peek_char((0x55aefe44e2f0), _417014)
   Exit: (261) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (261) [system] char_type('(', space)
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _391032)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _391032)
^  Call: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (262) [system] string((0x55aefe44e2f0))
^  Redo: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _391032)
^  Unify: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _391032)
^  Call: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _391032)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _391032)
   Call: (263) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _391032)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _391032)
   Call: (263) [system] peek_char((0x55aefe44e2f0), _432768)
   Exit: (263) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (263) [system] char_type('(', space)
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _391032)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _391032)
   Call: (263) [system] _437410=(0x55aefe44e2f0)
   Exit: (263) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (263) [user] once((read_position((0x55aefe44e2f0), _439278, _439280, _439282, _439284), read_sexpr((0x55aefe44e2f0), _439296), assertz(metta_file_comment(_439278, _439280, _439282, _439296, _439284))))
^  Unify: (263) [system] once(user:(read_position((0x55aefe44e2f0), _439278, _439280, _439282, _439284), read_sexpr((0x55aefe44e2f0), _439296), assertz(metta_file_comment(_439278, _439280, _439282, _439296, _439284))))
^  Call: (265) [user] read_position((0x55aefe44e2f0), _439278, _439280, _439282, _439284)
^  Unify: (265) [user] read_position((0x55aefe44e2f0), _439278, _439280, _439282, _439284)
   Call: (266) [system] stream_property((0x55aefe44e2f0), position(_439284))
   Unify: (266) [system] stream_property((0x55aefe44e2f0), position(_439284))
   Call: (267) [system] nonvar((0x55aefe44e2f0))
   Exit: (267) [system] nonvar((0x55aefe44e2f0))
   Call: (267) [system] nonvar(position(_439284))
   Exit: (267) [system] nonvar(position(_439284))
   Exit: (266) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(238, 10, 0, 238)))
   Call: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(238, 10, 0, 238), _439278)
   Unify: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(238, 10, 0, 238), _439278)
   Call: (267) [system] nonvar(line_count)
   Exit: (267) [system] nonvar(line_count)
   Call: (267) [$syspreds] stream_position_field(line_count, _453266)
   Unify: (267) [$syspreds] stream_position_field(line_count, 2)
   Exit: (267) [$syspreds] stream_position_field(line_count, 2)
   Call: (267) [system] arg(2, '$stream_position'(238, 10, 0, 238), _439278)
   Exit: (267) [system] arg(2, '$stream_position'(238, 10, 0, 238), 10)
   Exit: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(238, 10, 0, 238), 10)
   Call: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(238, 10, 0, 238), _439280)
   Unify: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(238, 10, 0, 238), _439280)
   Call: (267) [system] nonvar(line_position)
   Exit: (267) [system] nonvar(line_position)
   Call: (267) [$syspreds] stream_position_field(line_position, _462560)
   Unify: (267) [$syspreds] stream_position_field(line_position, 3)
   Exit: (267) [$syspreds] stream_position_field(line_position, 3)
   Call: (267) [system] arg(3, '$stream_position'(238, 10, 0, 238), _439280)
   Exit: (267) [system] arg(3, '$stream_position'(238, 10, 0, 238), 0)
   Exit: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(238, 10, 0, 238), 0)
   Call: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(238, 10, 0, 238), _439282)
   Unify: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(238, 10, 0, 238), _439282)
   Call: (267) [system] nonvar(char_count)
   Exit: (267) [system] nonvar(char_count)
   Call: (267) [$syspreds] stream_position_field(char_count, _471854)
   Unify: (267) [$syspreds] stream_position_field(char_count, 1)
   Exit: (267) [$syspreds] stream_position_field(char_count, 1)
   Call: (267) [system] arg(1, '$stream_position'(238, 10, 0, 238), _439282)
   Exit: (267) [system] arg(1, '$stream_position'(238, 10, 0, 238), 238)
   Exit: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(238, 10, 0, 238), 238)
^  Exit: (265) [user] read_position((0x55aefe44e2f0), 10, 0, 238, '$stream_position'(238, 10, 0, 238))
^  Call: (265) [user] read_sexpr((0x55aefe44e2f0), _439296)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _439296)
   Call: (266) [system] string((0x55aefe44e2f0))
^  Redo: (265) [user] read_sexpr((0x55aefe44e2f0), _439296)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _439296)
^  Call: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _439296)
^  Unify: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _439296)
^  Call: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _486724)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (268) [system] '('=(;)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', 'white')
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', end_of_line)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', space)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', cntrl)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (267) [system] get_char((0x55aefe44e2f0), _503508)
   Exit: (267) [system] get_char((0x55aefe44e2f0), '(')
   Call: (267) [system] '('='('
   Exit: (267) [system] '('='('
^  Call: (267) [user] read_list(')', (0x55aefe44e2f0), _439296)
^  Unify: (267) [user] read_list(')', (0x55aefe44e2f0), _439296)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _510934)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, 'white')
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, end_of_line)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, space)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _9630)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), :)
   Call: (268) [system] (:)=')'
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _5942)
   Call: (268) [system] (:)=end_of_file
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _5942)
^  Call: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _15208)
^  Unify: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _15208)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _18922)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, 'white')
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, end_of_line)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, space)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, cntrl)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] get_char((0x55aefe44e2f0), _35706)
   Exit: (269) [system] get_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)='('
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _15208)
   Call: (269) [system] (:)='['
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _15208)
   Call: (269) [system] (:)='{'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _15208)
   Call: (269) [system] (:)='"'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _15208)
   Call: (269) [system] (:)=!
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _15208)
   Call: (269) [system] (:)='\''
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _15208)
   Call: (269) [system] (:)='`'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _15208)
   Call: (269) [system] (:)=end_of_file
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _15208)
^  Call: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _15208)
^  Unify: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _15208)
^  Call: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _54316)
^  Unify: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _54316)
   Call: (271) [system] peek_char((0x55aefe44e2f0), _56182)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] is_delimiter(' ')
^  Unify: (271) [user] is_delimiter(' ')
   Call: (272) [system] char_type(' ', space)
   Exit: (272) [system] char_type(' ', space)
^  Exit: (271) [user] is_delimiter(' ')
   Call: (271) [system] _54316=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (270) [user] classify_and_convert_charseq(:, [], _15208)
^  Unify: (270) [user] classify_and_convert_charseq(:, [], _15208)
^  Call: (272) [system] setup_call_cleanup('$notrace'(_67348, _67350), once(user:catch(read_from_chars([:], _15208), _67324, fail)), '$restore_trace'(_67348, _67350))
^  Unify: (272) [system] setup_call_cleanup(system:'$notrace'(_67348, _67350), system:once(user:catch(read_from_chars([:], _15208), _67324, fail)), system:'$restore_trace'(_67348, _67350))
^  Call: (273) [system] sig_atomic(system:'$notrace'(_67348, _67350))
^  Exit: (272) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([:], :), _67324, fail)), system:'$restore_trace'(3, -1))
   Call: (271) [system] atomic(:)
   Exit: (271) [system] atomic(:)
^  Exit: (270) [user] classify_and_convert_charseq(:, [], :)
^  Exit: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, :)
^  Exit: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), :)
^  Call: (268) [user] read_list(')', (0x55aefe44e2f0), _75786)
^  Unify: (268) [user] read_list(')', (0x55aefe44e2f0), _75786)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _79500)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (270) [system] ' '=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(' ')
^  Unify: (270) [user] is_like_space(' ')
   Call: (271) [system] char_type(' ', 'white')
   Exit: (271) [system] char_type(' ', 'white')
^  Exit: (270) [user] is_like_space(' ')
   Call: (270) [system] get_char((0x55aefe44e2f0), _88158)
   Exit: (270) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _91786)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), c)
   Call: (271) [system] c=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, 'white')
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, end_of_line)
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, space)
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _109494)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), c)
   Call: (269) [system] c=')'
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _75786)
   Call: (269) [system] c=end_of_file
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _75786)
^  Call: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _115072)
^  Unify: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _115072)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _118786)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), c)
   Call: (271) [system] c=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, 'white')
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, end_of_line)
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, space)
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] get_char((0x55aefe44e2f0), _135570)
   Exit: (270) [system] get_char((0x55aefe44e2f0), c)
   Call: (270) [system] c='('
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _115072)
   Call: (270) [system] c='['
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _115072)
   Call: (270) [system] c='{'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _115072)
   Call: (270) [system] c='"'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _115072)
   Call: (270) [system] c=!
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _115072)
   Call: (270) [system] c='\''
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _115072)
   Call: (270) [system] c='`'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _115072)
   Call: (270) [system] c=end_of_file
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _115072)
^  Call: (270) [user] read_symbolic(')', (0x55aefe44e2f0), c, _115072)
^  Unify: (270) [user] read_symbolic(')', (0x55aefe44e2f0), c, _115072)
^  Call: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _154180)
^  Unify: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _154180)
   Call: (272) [system] peek_char((0x55aefe44e2f0), _156046)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (272) [user] is_delimiter(o)
^  Unify: (272) [user] is_delimiter(o)
   Call: (273) [system] char_type(o, space)
^  Redo: (272) [user] is_delimiter(o)
   Call: (273) [system] arg(_161686, v('(', ')', end_of_file), o)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _154180)
   Call: (272) [system] ')'==o
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _154180)
   Call: (272) [system] get_char((0x55aefe44e2f0), o)
   Exit: (272) [system] get_char((0x55aefe44e2f0), o)
   Call: (272) [system] o=(\)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _154180)
^  Call: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169052)
^  Unify: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169052)
   Call: (273) [system] peek_char((0x55aefe44e2f0), _170918)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (273) [user] is_delimiter(n)
^  Unify: (273) [user] is_delimiter(n)
   Call: (274) [system] char_type(n, space)
^  Redo: (273) [user] is_delimiter(n)
   Call: (274) [system] arg(_176558, v('(', ')', end_of_file), n)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169052)
   Call: (273) [system] ')'==n
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169052)
   Call: (273) [system] get_char((0x55aefe44e2f0), n)
   Exit: (273) [system] get_char((0x55aefe44e2f0), n)
   Call: (273) [system] n=(\)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169052)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _183924)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _183924)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _185790)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (274) [user] is_delimiter(s)
^  Unify: (274) [user] is_delimiter(s)
   Call: (275) [system] char_type(s, space)
^  Redo: (274) [user] is_delimiter(s)
   Call: (275) [system] arg(_191430, v('(', ')', end_of_file), s)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _183924)
   Call: (274) [system] ')'==s
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _183924)
   Call: (274) [system] get_char((0x55aefe44e2f0), s)
   Exit: (274) [system] get_char((0x55aefe44e2f0), s)
   Call: (274) [system] s=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _183924)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _198796)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _198796)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _200662)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] is_delimiter(' ')
^  Unify: (275) [user] is_delimiter(' ')
   Call: (276) [system] char_type(' ', space)
   Exit: (276) [system] char_type(' ', space)
^  Exit: (275) [user] is_delimiter(' ')
   Call: (275) [system] _198796=[]
   Exit: (275) [system] []=[]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (274) [system] _183924=[s]
   Exit: (274) [system] [s]=[s]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s])
   Call: (273) [system] _169052=[n, s]
   Exit: (273) [system] [n, s]=[n, s]
^  Exit: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n, s])
   Call: (272) [system] _154180=[o, n, s]
   Exit: (272) [system] [o, n, s]=[o, n, s]
^  Exit: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, n, s])
^  Call: (271) [user] classify_and_convert_charseq(c, [o, n, s], _115072)
^  Unify: (271) [user] classify_and_convert_charseq(c, [o, n, s], _115072)
^  Call: (273) [system] setup_call_cleanup('$notrace'(_220210, _220212), once(user:catch(read_from_chars([c, o, n, s], _115072), _220186, fail)), '$restore_trace'(_220210, _220212))
^  Unify: (273) [system] setup_call_cleanup(system:'$notrace'(_220210, _220212), system:once(user:catch(read_from_chars([c, o, n, s], _115072), _220186, fail)), system:'$restore_trace'(_220210, _220212))
^  Call: (274) [system] sig_atomic(system:'$notrace'(_220210, _220212))
^  Exit: (273) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([c, o, n, s], cons), _220186, fail)), system:'$restore_trace'(3, -1))
   Call: (272) [system] atomic(cons)
   Exit: (272) [system] atomic(cons)
^  Exit: (271) [user] classify_and_convert_charseq(c, [o, n, s], cons)
^  Exit: (270) [user] read_symbolic(')', (0x55aefe44e2f0), c, cons)
^  Exit: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), cons)
^  Call: (269) [user] read_list(')', (0x55aefe44e2f0), _228648)
^  Unify: (269) [user] read_list(')', (0x55aefe44e2f0), _228648)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _232362)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (271) [system] ' '=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(' ')
^  Unify: (271) [user] is_like_space(' ')
   Call: (272) [system] char_type(' ', 'white')
   Exit: (272) [system] char_type(' ', 'white')
^  Exit: (271) [user] is_like_space(' ')
   Call: (271) [system] get_char((0x55aefe44e2f0), _241020)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _244648)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _262356)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (270) [system] '('=')'
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _228648)
   Call: (270) [system] '('=end_of_file
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _228648)
^  Call: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _267934)
^  Unify: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _267934)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _271648)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] get_char((0x55aefe44e2f0), _288432)
   Exit: (271) [system] get_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('='('
   Exit: (271) [system] '('='('
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _267934)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _267934)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _295858)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, 'white')
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, end_of_line)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, space)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _312642)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), -)
   Call: (272) [system] (-)=')'
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _267934)
   Call: (272) [system] (-)=end_of_file
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _267934)
^  Call: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _318220)
^  Unify: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _318220)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _321934)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, 'white')
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, end_of_line)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, space)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] get_char((0x55aefe44e2f0), _338718)
   Exit: (273) [system] get_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)='('
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _318220)
   Call: (273) [system] (-)='['
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _318220)
   Call: (273) [system] (-)='{'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _318220)
   Call: (273) [system] (-)='"'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _318220)
   Call: (273) [system] (-)=!
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _318220)
   Call: (273) [system] (-)='\''
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _318220)
   Call: (273) [system] (-)='`'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _318220)
   Call: (273) [system] (-)=end_of_file
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _318220)
^  Call: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _318220)
^  Unify: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _318220)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _357328)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _357328)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _359194)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), >)
^  Call: (275) [user] is_delimiter(>)
^  Unify: (275) [user] is_delimiter(>)
   Call: (276) [system] char_type(>, space)
^  Redo: (275) [user] is_delimiter(>)
   Call: (276) [system] arg(_364834, v('(', ')', end_of_file), >)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _357328)
   Call: (275) [system] ')'==(>)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _357328)
   Call: (275) [system] get_char((0x55aefe44e2f0), >)
   Exit: (275) [system] get_char((0x55aefe44e2f0), >)
   Call: (275) [system] (>)=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _357328)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _372200)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _372200)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _374066)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] is_delimiter(' ')
^  Unify: (276) [user] is_delimiter(' ')
   Call: (277) [system] char_type(' ', space)
   Exit: (277) [system] char_type(' ', space)
^  Exit: (276) [user] is_delimiter(' ')
   Call: (276) [system] _372200=[]
   Exit: (276) [system] []=[]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (275) [system] _357328=[>]
   Exit: (275) [system] [>]=[>]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [>])
^  Call: (274) [user] classify_and_convert_charseq(-, [>], _318220)
^  Unify: (274) [user] classify_and_convert_charseq(-, [>], _318220)
^  Call: (276) [system] setup_call_cleanup('$notrace'(_388026, _388028), once(user:catch(read_from_chars([-, >], _318220), _388002, fail)), '$restore_trace'(_388026, _388028))
^  Unify: (276) [system] setup_call_cleanup(system:'$notrace'(_388026, _388028), system:once(user:catch(read_from_chars([-, >], _318220), _388002, fail)), system:'$restore_trace'(_388026, _388028))
^  Call: (277) [system] sig_atomic(system:'$notrace'(_388026, _388028))
^  Exit: (276) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([-, >], ->), _388002, fail)), system:'$restore_trace'(3, -1))
   Call: (275) [system] atomic(->)
   Exit: (275) [system] atomic(->)
^  Exit: (274) [user] classify_and_convert_charseq(-, [>], ->)
^  Exit: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, ->)
^  Exit: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), ->)
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _396464)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _396464)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _400178)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (274) [system] ' '=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(' ')
^  Unify: (274) [user] is_like_space(' ')
   Call: (275) [system] char_type(' ', 'white')
   Exit: (275) [system] char_type(' ', 'white')
^  Exit: (274) [user] is_like_space(' ')
   Call: (274) [system] get_char((0x55aefe44e2f0), _408836)
   Exit: (274) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _412464)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', 'white')
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', end_of_line)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', space)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _430172)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (273) [system] 'A'=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _396464)
   Call: (273) [system] 'A'=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _396464)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _435750)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _435750)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _439464)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', 'white')
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', end_of_line)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', space)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _456248)
   Exit: (274) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (274) [system] 'A'='('
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _435750)
   Call: (274) [system] 'A'='['
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _435750)
   Call: (274) [system] 'A'='{'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _435750)
   Call: (274) [system] 'A'='"'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _435750)
   Call: (274) [system] 'A'=!
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _435750)
   Call: (274) [system] 'A'='\''
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _435750)
   Call: (274) [system] 'A'='`'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _435750)
   Call: (274) [system] 'A'=end_of_file
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _435750)
^  Call: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _435750)
^  Unify: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _435750)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _474858)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _474858)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _476724)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (276) [user] is_delimiter(t)
^  Unify: (276) [user] is_delimiter(t)
   Call: (277) [system] char_type(t, space)
^  Redo: (276) [user] is_delimiter(t)
   Call: (277) [system] arg(_482364, v('(', ')', end_of_file), t)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _474858)
   Call: (276) [system] ')'==t
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _474858)
   Call: (276) [system] get_char((0x55aefe44e2f0), t)
   Exit: (276) [system] get_char((0x55aefe44e2f0), t)
   Call: (276) [system] t=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _474858)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _489730)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _489730)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _491596)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (277) [user] is_delimiter(o)
^  Unify: (277) [user] is_delimiter(o)
   Call: (278) [system] char_type(o, space)
^  Redo: (277) [user] is_delimiter(o)
   Call: (278) [system] arg(_497236, v('(', ')', end_of_file), o)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _489730)
   Call: (277) [system] ')'==o
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _489730)
   Call: (277) [system] get_char((0x55aefe44e2f0), o)
   Exit: (277) [system] get_char((0x55aefe44e2f0), o)
   Call: (277) [system] o=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _489730)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _504602)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _504602)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _506468)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (278) [user] is_delimiter(m)
^  Unify: (278) [user] is_delimiter(m)
   Call: (279) [system] char_type(m, space)
^  Redo: (278) [user] is_delimiter(m)
   Call: (279) [system] arg(_512108, v('(', ')', end_of_file), m)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _504602)
   Call: (278) [system] ')'==m
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _504602)
   Call: (278) [system] get_char((0x55aefe44e2f0), m)
   Exit: (278) [system] get_char((0x55aefe44e2f0), m)
   Call: (278) [system] m=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _504602)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _519474)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _519474)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _521340)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (279) [user] is_delimiter(' ')
^  Unify: (279) [user] is_delimiter(' ')
   Call: (280) [system] char_type(' ', space)
   Exit: (280) [system] char_type(' ', space)
^  Exit: (279) [user] is_delimiter(' ')
   Call: (279) [system] _6020=[]
   Exit: (279) [system] []=[]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (278) [system] _6016=[m]
   Exit: (278) [system] [m]=[m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (277) [system] _6012=[o, m]
   Exit: (277) [system] [o, m]=[o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (276) [system] _6008=[t, o, m]
   Exit: (276) [system] [t, o, m]=[t, o, m]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (275) [user] classify_and_convert_charseq('A', [t, o, m], _6004)
^  Unify: (275) [user] classify_and_convert_charseq('A', [t, o, m], _6004)
^  Call: (277) [system] setup_call_cleanup('$notrace'(_22758, _22760), once(user:catch(read_from_chars(['A', t, o, m], _6004), _22734, fail)), '$restore_trace'(_22758, _22760))
^  Unify: (277) [system] setup_call_cleanup(system:'$notrace'(_22758, _22760), system:once(user:catch(read_from_chars(['A', t, o, m], _6004), _22734, fail)), system:'$restore_trace'(_22758, _22760))
^  Call: (278) [system] sig_atomic(system:'$notrace'(_22758, _22760))
^  Exit: (277) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _6004), _22734, fail)), system:'$restore_trace'(3, -1))
   Call: (276) [system] atomic(_6004)
^  Redo: (275) [user] classify_and_convert_charseq('A', [t, o, m], _6004)
^  Unify: (275) [user] classify_and_convert_charseq('A', [t, o, m], _6004)
   Call: (276) [system] atom_chars(_6004, ['A', t, o, m])
   Exit: (276) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (275) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (273) [user] read_list(')', (0x55aefe44e2f0), _34012)
^  Unify: (273) [user] read_list(')', (0x55aefe44e2f0), _34012)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _37726)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (275) [system] ' '=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(' ')
^  Unify: (275) [user] is_like_space(' ')
   Call: (276) [system] char_type(' ', 'white')
   Exit: (276) [system] char_type(' ', 'white')
^  Exit: (275) [user] is_like_space(' ')
   Call: (275) [system] get_char((0x55aefe44e2f0), _46384)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _50012)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _67720)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (274) [system] 'A'=')'
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _34012)
   Call: (274) [system] 'A'=end_of_file
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _34012)
^  Call: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _73298)
^  Unify: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _73298)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _77012)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] get_char((0x55aefe44e2f0), _93796)
   Exit: (275) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'='('
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _73298)
   Call: (275) [system] 'A'='['
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _73298)
   Call: (275) [system] 'A'='{'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _73298)
   Call: (275) [system] 'A'='"'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _73298)
   Call: (275) [system] 'A'=!
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _73298)
   Call: (275) [system] 'A'='\''
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _73298)
   Call: (275) [system] 'A'='`'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _73298)
   Call: (275) [system] 'A'=end_of_file
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _73298)
^  Call: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _73298)
^  Unify: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _73298)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _112406)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _112406)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _114272)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (277) [user] is_delimiter(t)
^  Unify: (277) [user] is_delimiter(t)
   Call: (278) [system] char_type(t, space)
^  Redo: (277) [user] is_delimiter(t)
   Call: (278) [system] arg(_119912, v('(', ')', end_of_file), t)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _112406)
   Call: (277) [system] ')'==t
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _112406)
   Call: (277) [system] get_char((0x55aefe44e2f0), t)
   Exit: (277) [system] get_char((0x55aefe44e2f0), t)
   Call: (277) [system] t=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _112406)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _127278)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _127278)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _129144)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (278) [user] is_delimiter(o)
^  Unify: (278) [user] is_delimiter(o)
   Call: (279) [system] char_type(o, space)
^  Redo: (278) [user] is_delimiter(o)
   Call: (279) [system] arg(_134784, v('(', ')', end_of_file), o)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _127278)
   Call: (278) [system] ')'==o
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _127278)
   Call: (278) [system] get_char((0x55aefe44e2f0), o)
   Exit: (278) [system] get_char((0x55aefe44e2f0), o)
   Call: (278) [system] o=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _127278)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _142150)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _142150)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _144016)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (279) [user] is_delimiter(m)
^  Unify: (279) [user] is_delimiter(m)
   Call: (280) [system] char_type(m, space)
^  Redo: (279) [user] is_delimiter(m)
   Call: (280) [system] arg(_149656, v('(', ')', end_of_file), m)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _142150)
   Call: (279) [system] ')'==m
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _142150)
   Call: (279) [system] get_char((0x55aefe44e2f0), m)
   Exit: (279) [system] get_char((0x55aefe44e2f0), m)
   Call: (279) [system] m=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _142150)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _157022)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _157022)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _158888)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (280) [user] is_delimiter(' ')
^  Unify: (280) [user] is_delimiter(' ')
   Call: (281) [system] char_type(' ', space)
   Exit: (281) [system] char_type(' ', space)
^  Exit: (280) [user] is_delimiter(' ')
   Call: (280) [system] _157022=[]
   Exit: (280) [system] []=[]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (279) [system] _142150=[m]
   Exit: (279) [system] [m]=[m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (278) [system] _127278=[o, m]
   Exit: (278) [system] [o, m]=[o, m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (277) [system] _112406=[t, o, m]
   Exit: (277) [system] [t, o, m]=[t, o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (276) [user] classify_and_convert_charseq('A', [t, o, m], _73298)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _73298)
^  Call: (278) [system] setup_call_cleanup('$notrace'(_178436, _178438), once(user:catch(read_from_chars(['A', t, o, m], _73298), _178412, fail)), '$restore_trace'(_178436, _178438))
^  Unify: (278) [system] setup_call_cleanup(system:'$notrace'(_178436, _178438), system:once(user:catch(read_from_chars(['A', t, o, m], _73298), _178412, fail)), system:'$restore_trace'(_178436, _178438))
^  Call: (279) [system] sig_atomic(system:'$notrace'(_178436, _178438))
^  Exit: (278) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _73298), _178412, fail)), system:'$restore_trace'(3, -1))
   Call: (277) [system] atomic(_73298)
^  Redo: (276) [user] classify_and_convert_charseq('A', [t, o, m], _73298)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _73298)
   Call: (277) [system] atom_chars(_73298, ['A', t, o, m])
   Exit: (277) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (276) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _189690)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _189690)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _193404)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (276) [system] ' '=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(' ')
^  Unify: (276) [user] is_like_space(' ')
   Call: (277) [system] char_type(' ', 'white')
   Exit: (277) [system] char_type(' ', 'white')
^  Exit: (276) [user] is_like_space(' ')
   Call: (276) [system] get_char((0x55aefe44e2f0), _202062)
   Exit: (276) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _205690)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (277) [system] 'A'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', 'white')
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', end_of_line)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', space)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _223398)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=')'
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _189690)
   Call: (275) [system] 'A'=end_of_file
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _189690)
^  Call: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _228976)
^  Unify: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _228976)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _232690)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (277) [system] 'A'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', 'white')
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', end_of_line)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', space)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] get_char((0x55aefe44e2f0), _249474)
   Exit: (276) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'='('
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _228976)
   Call: (276) [system] 'A'='['
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _228976)
   Call: (276) [system] 'A'='{'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _228976)
   Call: (276) [system] 'A'='"'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _228976)
   Call: (276) [system] 'A'=!
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _228976)
   Call: (276) [system] 'A'='\''
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _228976)
   Call: (276) [system] 'A'='`'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _228976)
   Call: (276) [system] 'A'=end_of_file
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _228976)
^  Call: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _228976)
^  Unify: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _228976)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _268084)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _268084)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _269950)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (278) [user] is_delimiter(t)
^  Unify: (278) [user] is_delimiter(t)
   Call: (279) [system] char_type(t, space)
^  Redo: (278) [user] is_delimiter(t)
   Call: (279) [system] arg(_275590, v('(', ')', end_of_file), t)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _268084)
   Call: (278) [system] ')'==t
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _268084)
   Call: (278) [system] get_char((0x55aefe44e2f0), t)
   Exit: (278) [system] get_char((0x55aefe44e2f0), t)
   Call: (278) [system] t=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _268084)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _282956)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _282956)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _284822)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (279) [user] is_delimiter(o)
^  Unify: (279) [user] is_delimiter(o)
   Call: (280) [system] char_type(o, space)
^  Redo: (279) [user] is_delimiter(o)
   Call: (280) [system] arg(_290462, v('(', ')', end_of_file), o)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _282956)
   Call: (279) [system] ')'==o
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _282956)
   Call: (279) [system] get_char((0x55aefe44e2f0), o)
   Exit: (279) [system] get_char((0x55aefe44e2f0), o)
   Call: (279) [system] o=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _282956)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _297828)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _297828)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _299694)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (280) [user] is_delimiter(m)
^  Unify: (280) [user] is_delimiter(m)
   Call: (281) [system] char_type(m, space)
^  Redo: (280) [user] is_delimiter(m)
   Call: (281) [system] arg(_305334, v('(', ')', end_of_file), m)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _297828)
   Call: (280) [system] ')'==m
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _297828)
   Call: (280) [system] get_char((0x55aefe44e2f0), m)
   Exit: (280) [system] get_char((0x55aefe44e2f0), m)
   Call: (280) [system] m=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _297828)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _312700)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _312700)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _314566)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (281) [user] is_delimiter(')')
^  Unify: (281) [user] is_delimiter(')')
   Call: (282) [system] char_type(')', space)
^  Redo: (281) [user] is_delimiter(')')
   Call: (282) [system] arg(_320206, v('(', ')', end_of_file), ')')
   Exit: (282) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (281) [user] is_delimiter(')')
   Call: (281) [system] _312700=[]
   Exit: (281) [system] []=[]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (280) [system] _297828=[m]
   Exit: (280) [system] [m]=[m]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (279) [system] _282956=[o, m]
   Exit: (279) [system] [o, m]=[o, m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (278) [system] _268084=[t, o, m]
   Exit: (278) [system] [t, o, m]=[t, o, m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (277) [user] classify_and_convert_charseq('A', [t, o, m], _228976)
^  Unify: (277) [user] classify_and_convert_charseq('A', [t, o, m], _228976)
^  Call: (279) [system] setup_call_cleanup('$notrace'(_335982, _335984), once(user:catch(read_from_chars(['A', t, o, m], _228976), _335958, fail)), '$restore_trace'(_335982, _335984))
^  Unify: (279) [system] setup_call_cleanup(system:'$notrace'(_335982, _335984), system:once(user:catch(read_from_chars(['A', t, o, m], _228976), _335958, fail)), system:'$restore_trace'(_335982, _335984))
^  Call: (280) [system] sig_atomic(system:'$notrace'(_335982, _335984))
^  Exit: (279) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _228976), _335958, fail)), system:'$restore_trace'(3, -1))
   Call: (278) [system] atomic(_228976)
^  Redo: (277) [user] classify_and_convert_charseq('A', [t, o, m], _228976)
^  Unify: (277) [user] classify_and_convert_charseq('A', [t, o, m], _228976)
   Call: (278) [system] atom_chars(_228976, ['A', t, o, m])
   Exit: (278) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (277) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (275) [user] read_list(')', (0x55aefe44e2f0), _347236)
^  Unify: (275) [user] read_list(')', (0x55aefe44e2f0), _347236)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _350950)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (277) [system] ')'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space(')')
^  Unify: (277) [user] is_like_space(')')
   Call: (278) [system] char_type(')', 'white')
^  Redo: (277) [user] is_like_space(')')
^  Unify: (277) [user] is_like_space(')')
   Call: (278) [system] char_type(')', end_of_line)
^  Redo: (277) [user] is_like_space(')')
^  Unify: (277) [user] is_like_space(')')
   Call: (278) [system] char_type(')', space)
^  Redo: (277) [user] is_like_space(')')
^  Unify: (277) [user] is_like_space(')')
   Call: (278) [system] char_type(')', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _367734)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (276) [system] ')'=')'
   Exit: (276) [system] ')'=')'
   Call: (276) [system] get_char((0x55aefe44e2f0), _371524)
   Exit: (276) [system] get_char((0x55aefe44e2f0), ')')
   Call: (276) [system] _347236=[]
   Exit: (276) [system] []=[]
^  Exit: (275) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (275) [system] _189690=['Atom']
   Exit: (275) [system] ['Atom']=['Atom']
^  Exit: (274) [user] read_list(')', (0x55aefe44e2f0), ['Atom'])
   Call: (274) [system] _34012=['Atom', 'Atom']
   Exit: (274) [system] ['Atom', 'Atom']=['Atom', 'Atom']
^  Exit: (273) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Atom'])
   Call: (273) [system] _6000=['Atom', 'Atom', 'Atom']
   Exit: (273) [system] ['Atom', 'Atom', 'Atom']=['Atom', 'Atom', 'Atom']
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Atom', 'Atom'])
   Call: (272) [system] _5992=[->, 'Atom', 'Atom', 'Atom']
   Exit: (272) [system] [->, 'Atom', 'Atom', 'Atom']=[->, 'Atom', 'Atom', 'Atom']
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [->, 'Atom', 'Atom', 'Atom'])
^  Exit: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), [->, 'Atom', 'Atom', 'Atom'])
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _388200)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _388200)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _391914)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (272) [system] ')'=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', 'white')
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', end_of_line)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', space)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _408698)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (271) [system] ')'=')'
   Exit: (271) [system] ')'=')'
   Call: (271) [system] get_char((0x55aefe44e2f0), _412488)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ')')
   Call: (271) [system] _388200=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (270) [system] _5988=[[->, 'Atom', 'Atom', 'Atom']]
   Exit: (270) [system] [[->, 'Atom', 'Atom', 'Atom']]=[[->, 'Atom', 'Atom', 'Atom']]
^  Exit: (269) [user] read_list(')', (0x55aefe44e2f0), [[->, 'Atom', 'Atom', 'Atom']])
   Call: (269) [system] _5982=[cons, [->, 'Atom', 'Atom', 'Atom']]
   Exit: (269) [system] [cons, [->, 'Atom', 'Atom', 'Atom']]=[cons, [->, 'Atom', 'Atom', 'Atom']]
^  Exit: (268) [user] read_list(')', (0x55aefe44e2f0), [cons, [->, 'Atom', 'Atom', 'Atom']])
   Call: (268) [system] _5942=[:, cons, [->, 'Atom', 'Atom', 'Atom']]
   Exit: (268) [system] [:, cons, [->, 'Atom', 'Atom', 'Atom']]=[:, cons, [->, 'Atom', 'Atom', 'Atom']]
^  Exit: (267) [user] read_list(')', (0x55aefe44e2f0), [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Exit: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Exit: (265) [user] read_sexpr((0x55aefe44e2f0), [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Call: (265) [user] assertz(metta_file_comment(10, 0, 238, [:, cons, [->, 'Atom', 'Atom', 'Atom']], '$stream_position'(238, 10, 0, 238)))
^  Exit: (265) [user] assertz(metta_file_comment(10, 0, 238, [:, cons, [->, 'Atom', 'Atom', 'Atom']], '$stream_position'(238, 10, 0, 238)))
^  Exit: (263) [system] once(user:(read_position((0x55aefe44e2f0), 10, 0, 238, '$stream_position'(238, 10, 0, 238)), read_sexpr((0x55aefe44e2f0), [:, cons, [->, 'Atom', 'Atom', 'Atom']]), assertz(metta_file_comment(10, 0, 238, [:, cons, [->, 'Atom', 'Atom', 'Atom']], '$stream_position'(238, 10, 0, 238)))))
   Call: (263) [system] fail
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Call: (263) [user] retract(metta_file_comment(_432862, _432864, _432866, _432868, _432870))
^  Exit: (263) [user] retract(metta_file_comment(10, 0, 238, [:, cons, [->, 'Atom', 'Atom', 'Atom']], '$stream_position'(238, 10, 0, 238)))
^  Call: (263) [user] trly(untyped_to_metta, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _5908)
^  Call: (264) [user] once(call(untyped_to_metta, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _436654))
^  Unify: (264) [system] once(user:call(untyped_to_metta, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _436654))
^  Call: (265) [user] call(untyped_to_metta, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _436654)
^  Unify: (265) [system] call(user:untyped_to_metta, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _436654)
^  Call: (266) [user] untyped_to_metta([:, cons, [->, 'Atom', 'Atom', 'Atom']], _436654)
^  Unify: (266) [user] untyped_to_metta([:, cons, [->, 'Atom', 'Atom', 'Atom']], _436654)
^  Call: (267) [user] must_det_ll(trly(mfix_vars1, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _442266))
^  Unify: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _442266))
^  Call: (268) [user] once(user:trly(mfix_vars1, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _442266))
^  Unify: (268) [system] once(user:trly(mfix_vars1, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _442266))
^  Call: (269) [user] trly(mfix_vars1, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _442266)
^  Unify: (269) [user] trly(mfix_vars1, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _442266)
^  Call: (270) [user] once(call(mfix_vars1, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852))
^  Unify: (270) [system] once(user:call(mfix_vars1, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852))
^  Call: (271) [user] call(mfix_vars1, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852)
^  Unify: (271) [system] call(user:mfix_vars1, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852)
^  Call: (272) [user] mfix_vars1([:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852)
^  Unify: (272) [user] mfix_vars1([:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852)
   Call: (273) [system] var([:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Redo: (272) [user] mfix_vars1([:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852)
^  Unify: (272) [user] mfix_vars1([:, cons, [->, 'Atom', 'Atom', 'Atom']], '$VAR'(_455312))
   Call: (273) [system] atom([:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Redo: (272) [user] mfix_vars1([:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852)
^  Unify: (272) [user] mfix_vars1([:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852)
   Call: (273) [system] [:, cons, [->, 'Atom', 'Atom', 'Atom']]==true
^  Redo: (272) [user] mfix_vars1([:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852)
^  Unify: (272) [user] mfix_vars1([:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852)
   Call: (273) [system] [:, cons, [->, 'Atom', 'Atom', 'Atom']]==false
^  Redo: (272) [user] mfix_vars1([:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852)
^  Unify: (272) [user] mfix_vars1([:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852)
   Call: (273) [system] (:)=='['
^  Redo: (272) [user] mfix_vars1([:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852)
^  Unify: (272) [user] mfix_vars1([:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852)
   Call: (273) [system] (:)=='{'
^  Redo: (272) [user] mfix_vars1([:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852)
^  Unify: (272) [user] mfix_vars1([:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852)
   Call: (273) [system] is_list([cons, [->, 'Atom', 'Atom', 'Atom']])
   Exit: (273) [system] is_list([cons, [->, 'Atom', 'Atom', 'Atom']])
   Call: (273) [lists] lists:last([cons, [->, 'Atom', 'Atom', 'Atom']], _472006)
   Unify: (273) [lists] lists:last([cons, [->, 'Atom', 'Atom', 'Atom']], _472006)
   Call: (274) [lists] lists:last_([[->, 'Atom', 'Atom', 'Atom']], cons, _472006)
   Unify: (274) [lists] lists:last_([[->, 'Atom', 'Atom', 'Atom']], cons, _472006)
   Call: (275) [lists] lists:last_([], [->, 'Atom', 'Atom', 'Atom'], _472006)
   Unify: (275) [lists] lists:last_([], [->, 'Atom', 'Atom', 'Atom'], [->, 'Atom', 'Atom', 'Atom'])
   Exit: (275) [lists] lists:last_([], [->, 'Atom', 'Atom', 'Atom'], [->, 'Atom', 'Atom', 'Atom'])
   Exit: (274) [lists] lists:last_([[->, 'Atom', 'Atom', 'Atom']], cons, [->, 'Atom', 'Atom', 'Atom'])
   Exit: (273) [lists] lists:last([cons, [->, 'Atom', 'Atom', 'Atom']], [->, 'Atom', 'Atom', 'Atom'])
   Call: (273) [system] [->, 'Atom', 'Atom', 'Atom']=='}'
^  Redo: (272) [user] mfix_vars1([:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852)
^  Unify: (272) [user] mfix_vars1([:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852)
   Call: (273) [system] [:, cons, [->, 'Atom', 'Atom', 'Atom']]==[_483170, _483176]
^  Redo: (272) [user] mfix_vars1([:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852)
^  Unify: (272) [user] mfix_vars1([:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852)
   Call: (273) [system] fail
^  Redo: (272) [user] mfix_vars1([:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852)
^  Unify: (272) [user] mfix_vars1([:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852)
   Call: (273) [system] is_list([:, cons, [->, 'Atom', 'Atom', 'Atom']])
   Exit: (273) [system] is_list([:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Call: (273) [user] apply:maplist(mfix_vars1, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852)
^  Unify: (273) [apply] apply:maplist(user:mfix_vars1, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852)
   Call: (274) [apply] apply:maplist_([:, cons, [->, 'Atom', 'Atom', 'Atom']], _447852, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([:, cons, [->, 'Atom', 'Atom', 'Atom']], [_493400|_493402], user:mfix_vars1)
^  Call: (275) [user] mfix_vars1(:, _493400)
^  Unify: (275) [user] mfix_vars1(:, _493400)
   Call: (276) [system] var(:)
^  Redo: (275) [user] mfix_vars1(:, _493400)
^  Unify: (275) [user] mfix_vars1(:, '$VAR'(_498046))
   Call: (276) [system] atom(:)
   Exit: (276) [system] atom(:)
^  Call: (276) [user] symbol_concat($, _500824, :)
^  Unify: (276) [user] symbol_concat($, _500824, :)
   Call: (277) [system] atom_concat($, _500824, :)
   Fail: (277) [system] atom_concat($, _500824, :)
^  Fail: (276) [user] symbol_concat($, _500824, :)
^  Redo: (275) [user] mfix_vars1(:, _493400)
^  Unify: (275) [user] mfix_vars1(:, _493400)
   Call: (276) [system] (:)==true
^  Redo: (275) [user] mfix_vars1(:, _493400)
^  Unify: (275) [user] mfix_vars1(:, _493400)
   Call: (276) [system] (:)==false
^  Redo: (275) [user] mfix_vars1(:, _493400)
^  Unify: (275) [user] mfix_vars1(:, _493400)
   Call: (276) [system] (:)==[_512912, _512918]
^  Redo: (275) [user] mfix_vars1(:, _493400)
^  Unify: (275) [user] mfix_vars1(:, _493400)
   Call: (276) [system] is_list(:)
^  Redo: (275) [user] mfix_vars1(:, _493400)
^  Unify: (275) [user] mfix_vars1(:, _493400)
   Call: (276) [system] string(:)
^  Redo: (275) [user] mfix_vars1(:, _493400)
^  Unify: (275) [user] mfix_vars1(:, _493400)
   Call: (276) [system] compound(:)
^  Redo: (275) [user] mfix_vars1(:, _493400)
^  Unify: (275) [user] mfix_vars1(:, _493400)
^  Call: (276) [user] symbol(:)
^  Unify: (276) [user] symbol(:)
   Call: (277) [system] atom(:)
   Exit: (277) [system] atom(:)
^  Exit: (276) [user] symbol(:)
^  Unify: (275) [user] mfix_vars1(:, :)
^  Exit: (275) [user] mfix_vars1(:, :)
   Call: (275) [apply] apply:maplist_([cons, [->, 'Atom', 'Atom', 'Atom']], _6020, user:mfix_vars1)
   Unify: (275) [apply] apply:maplist_([cons, [->, 'Atom', 'Atom', 'Atom']], [_13382|_13384], user:mfix_vars1)
^  Call: (276) [user] mfix_vars1(cons, _13382)
^  Unify: (276) [user] mfix_vars1(cons, _13382)
   Call: (277) [system] var(cons)
^  Redo: (276) [user] mfix_vars1(cons, _13382)
^  Unify: (276) [user] mfix_vars1(cons, '$VAR'(_18028))
   Call: (277) [system] atom(cons)
   Exit: (277) [system] atom(cons)
^  Call: (277) [user] symbol_concat($, _20806, cons)
^  Unify: (277) [user] symbol_concat($, _20806, cons)
   Call: (278) [system] atom_concat($, _20806, cons)
   Fail: (278) [system] atom_concat($, _20806, cons)
^  Fail: (277) [user] symbol_concat($, _20806, cons)
^  Redo: (276) [user] mfix_vars1(cons, _13382)
^  Unify: (276) [user] mfix_vars1(cons, _13382)
   Call: (277) [system] cons==true
^  Redo: (276) [user] mfix_vars1(cons, _13382)
^  Unify: (276) [user] mfix_vars1(cons, _13382)
   Call: (277) [system] cons==false
^  Redo: (276) [user] mfix_vars1(cons, _13382)
^  Unify: (276) [user] mfix_vars1(cons, _13382)
   Call: (277) [system] cons==[_32894, _32900]
^  Redo: (276) [user] mfix_vars1(cons, _13382)
^  Unify: (276) [user] mfix_vars1(cons, _13382)
   Call: (277) [system] is_list(cons)
^  Redo: (276) [user] mfix_vars1(cons, _13382)
^  Unify: (276) [user] mfix_vars1(cons, _13382)
   Call: (277) [system] string(cons)
^  Redo: (276) [user] mfix_vars1(cons, _13382)
^  Unify: (276) [user] mfix_vars1(cons, _13382)
   Call: (277) [system] compound(cons)
^  Redo: (276) [user] mfix_vars1(cons, _13382)
^  Unify: (276) [user] mfix_vars1(cons, _13382)
^  Call: (277) [user] symbol(cons)
^  Unify: (277) [user] symbol(cons)
   Call: (278) [system] atom(cons)
   Exit: (278) [system] atom(cons)
^  Exit: (277) [user] symbol(cons)
^  Unify: (276) [user] mfix_vars1(cons, cons)
^  Exit: (276) [user] mfix_vars1(cons, cons)
   Call: (276) [apply] apply:maplist_([[->, 'Atom', 'Atom', 'Atom']], _13384, user:mfix_vars1)
   Unify: (276) [apply] apply:maplist_([[->, 'Atom', 'Atom', 'Atom']], [_51438|_51440], user:mfix_vars1)
^  Call: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom'], _51438)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom'], _51438)
   Call: (278) [system] var([->, 'Atom', 'Atom', 'Atom'])
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom'], _51438)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom'], '$VAR'(_56084))
   Call: (278) [system] atom([->, 'Atom', 'Atom', 'Atom'])
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom'], _51438)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom'], _51438)
   Call: (278) [system] [->, 'Atom', 'Atom', 'Atom']==true
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom'], _51438)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom'], _51438)
   Call: (278) [system] [->, 'Atom', 'Atom', 'Atom']==false
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom'], _51438)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom'], _51438)
   Call: (278) [system] (->)=='['
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom'], _51438)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom'], _51438)
   Call: (278) [system] (->)=='{'
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom'], _51438)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom'], _51438)
   Call: (278) [system] is_list(['Atom', 'Atom', 'Atom'])
   Exit: (278) [system] is_list(['Atom', 'Atom', 'Atom'])
   Call: (278) [lists] lists:last(['Atom', 'Atom', 'Atom'], _72778)
   Unify: (278) [lists] lists:last(['Atom', 'Atom', 'Atom'], _72778)
   Call: (279) [lists] lists:last_(['Atom', 'Atom'], 'Atom', _72778)
   Unify: (279) [lists] lists:last_(['Atom', 'Atom'], 'Atom', _72778)
   Call: (280) [lists] lists:last_(['Atom'], 'Atom', _72778)
   Unify: (280) [lists] lists:last_(['Atom'], 'Atom', _72778)
   Call: (281) [lists] lists:last_([], 'Atom', _72778)
   Unify: (281) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (281) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (280) [lists] lists:last_(['Atom'], 'Atom', 'Atom')
   Exit: (279) [lists] lists:last_(['Atom', 'Atom'], 'Atom', 'Atom')
   Exit: (278) [lists] lists:last(['Atom', 'Atom', 'Atom'], 'Atom')
   Call: (278) [system] 'Atom'=='}'
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom'], _51438)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom'], _51438)
   Call: (278) [system] [->, 'Atom', 'Atom', 'Atom']==[_86738, _86744]
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom'], _51438)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom'], _51438)
   Call: (278) [system] fail
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom'], _51438)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom'], _51438)
   Call: (278) [system] is_list([->, 'Atom', 'Atom', 'Atom'])
   Exit: (278) [system] is_list([->, 'Atom', 'Atom', 'Atom'])
^  Call: (278) [user] apply:maplist(mfix_vars1, [->, 'Atom', 'Atom', 'Atom'], _51438)
^  Unify: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Atom', 'Atom'], _51438)
   Call: (279) [apply] apply:maplist_([->, 'Atom', 'Atom', 'Atom'], _51438, user:mfix_vars1)
   Unify: (279) [apply] apply:maplist_([->, 'Atom', 'Atom', 'Atom'], [_96968|_96970], user:mfix_vars1)
^  Call: (280) [user] mfix_vars1(->, _96968)
^  Unify: (280) [user] mfix_vars1(->, _96968)
   Call: (281) [system] var(->)
^  Redo: (280) [user] mfix_vars1(->, _96968)
^  Unify: (280) [user] mfix_vars1(->, '$VAR'(_101614))
   Call: (281) [system] atom(->)
   Exit: (281) [system] atom(->)
^  Call: (281) [user] symbol_concat($, _104392, ->)
^  Unify: (281) [user] symbol_concat($, _104392, ->)
   Call: (282) [system] atom_concat($, _104392, ->)
   Fail: (282) [system] atom_concat($, _104392, ->)
^  Fail: (281) [user] symbol_concat($, _104392, ->)
^  Redo: (280) [user] mfix_vars1(->, _96968)
^  Unify: (280) [user] mfix_vars1(->, _96968)
   Call: (281) [system] (->)==true
^  Redo: (280) [user] mfix_vars1(->, _96968)
^  Unify: (280) [user] mfix_vars1(->, _96968)
   Call: (281) [system] (->)==false
^  Redo: (280) [user] mfix_vars1(->, _96968)
^  Unify: (280) [user] mfix_vars1(->, _96968)
   Call: (281) [system] (->)==[_116480, _116486]
^  Redo: (280) [user] mfix_vars1(->, _96968)
^  Unify: (280) [user] mfix_vars1(->, _96968)
   Call: (281) [system] is_list(->)
^  Redo: (280) [user] mfix_vars1(->, _96968)
^  Unify: (280) [user] mfix_vars1(->, _96968)
   Call: (281) [system] string(->)
^  Redo: (280) [user] mfix_vars1(->, _96968)
^  Unify: (280) [user] mfix_vars1(->, _96968)
   Call: (281) [system] compound(->)
^  Redo: (280) [user] mfix_vars1(->, _96968)
^  Unify: (280) [user] mfix_vars1(->, _96968)
^  Call: (281) [user] symbol(->)
^  Unify: (281) [user] symbol(->)
   Call: (282) [system] atom(->)
   Exit: (282) [system] atom(->)
^  Exit: (281) [user] symbol(->)
^  Unify: (280) [user] mfix_vars1(->, ->)
^  Exit: (280) [user] mfix_vars1(->, ->)
   Call: (280) [apply] apply:maplist_(['Atom', 'Atom', 'Atom'], _96970, user:mfix_vars1)
   Unify: (280) [apply] apply:maplist_(['Atom', 'Atom', 'Atom'], [_135024|_135026], user:mfix_vars1)
^  Call: (281) [user] mfix_vars1('Atom', _135024)
^  Unify: (281) [user] mfix_vars1('Atom', _135024)
   Call: (282) [system] var('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _135024)
^  Unify: (281) [user] mfix_vars1('Atom', '$VAR'(_139670))
   Call: (282) [system] atom('Atom')
   Exit: (282) [system] atom('Atom')
^  Call: (282) [user] symbol_concat($, _142448, 'Atom')
^  Unify: (282) [user] symbol_concat($, _142448, 'Atom')
   Call: (283) [system] atom_concat($, _142448, 'Atom')
   Fail: (283) [system] atom_concat($, _142448, 'Atom')
^  Fail: (282) [user] symbol_concat($, _142448, 'Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _135024)
^  Unify: (281) [user] mfix_vars1('Atom', _135024)
   Call: (282) [system] 'Atom'==true
^  Redo: (281) [user] mfix_vars1('Atom', _135024)
^  Unify: (281) [user] mfix_vars1('Atom', _135024)
   Call: (282) [system] 'Atom'==false
^  Redo: (281) [user] mfix_vars1('Atom', _135024)
^  Unify: (281) [user] mfix_vars1('Atom', _135024)
   Call: (282) [system] 'Atom'==[_154536, _154542]
^  Redo: (281) [user] mfix_vars1('Atom', _135024)
^  Unify: (281) [user] mfix_vars1('Atom', _135024)
   Call: (282) [system] is_list('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _135024)
^  Unify: (281) [user] mfix_vars1('Atom', _135024)
   Call: (282) [system] string('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _135024)
^  Unify: (281) [user] mfix_vars1('Atom', _135024)
   Call: (282) [system] compound('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _135024)
^  Unify: (281) [user] mfix_vars1('Atom', _135024)
^  Call: (282) [user] symbol('Atom')
^  Unify: (282) [user] symbol('Atom')
   Call: (283) [system] atom('Atom')
   Exit: (283) [system] atom('Atom')
^  Exit: (282) [user] symbol('Atom')
^  Unify: (281) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (281) [user] mfix_vars1('Atom', 'Atom')
   Call: (281) [apply] apply:maplist_(['Atom', 'Atom'], _135026, user:mfix_vars1)
   Unify: (281) [apply] apply:maplist_(['Atom', 'Atom'], [_173080|_173082], user:mfix_vars1)
^  Call: (282) [user] mfix_vars1('Atom', _173080)
^  Unify: (282) [user] mfix_vars1('Atom', _173080)
   Call: (283) [system] var('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _173080)
^  Unify: (282) [user] mfix_vars1('Atom', '$VAR'(_177726))
   Call: (283) [system] atom('Atom')
   Exit: (283) [system] atom('Atom')
^  Call: (283) [user] symbol_concat($, _180504, 'Atom')
^  Unify: (283) [user] symbol_concat($, _180504, 'Atom')
   Call: (284) [system] atom_concat($, _180504, 'Atom')
   Fail: (284) [system] atom_concat($, _180504, 'Atom')
^  Fail: (283) [user] symbol_concat($, _180504, 'Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _173080)
^  Unify: (282) [user] mfix_vars1('Atom', _173080)
   Call: (283) [system] 'Atom'==true
^  Redo: (282) [user] mfix_vars1('Atom', _173080)
^  Unify: (282) [user] mfix_vars1('Atom', _173080)
   Call: (283) [system] 'Atom'==false
^  Redo: (282) [user] mfix_vars1('Atom', _173080)
^  Unify: (282) [user] mfix_vars1('Atom', _173080)
   Call: (283) [system] 'Atom'==[_192592, _192598]
^  Redo: (282) [user] mfix_vars1('Atom', _173080)
^  Unify: (282) [user] mfix_vars1('Atom', _173080)
   Call: (283) [system] is_list('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _173080)
^  Unify: (282) [user] mfix_vars1('Atom', _173080)
   Call: (283) [system] string('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _173080)
^  Unify: (282) [user] mfix_vars1('Atom', _173080)
   Call: (283) [system] compound('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _173080)
^  Unify: (282) [user] mfix_vars1('Atom', _173080)
^  Call: (283) [user] symbol('Atom')
^  Unify: (283) [user] symbol('Atom')
   Call: (284) [system] atom('Atom')
   Exit: (284) [system] atom('Atom')
^  Exit: (283) [user] symbol('Atom')
^  Unify: (282) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (282) [user] mfix_vars1('Atom', 'Atom')
   Call: (282) [apply] apply:maplist_(['Atom'], _173082, user:mfix_vars1)
   Unify: (282) [apply] apply:maplist_(['Atom'], [_211136|_211138], user:mfix_vars1)
^  Call: (283) [user] mfix_vars1('Atom', _211136)
^  Unify: (283) [user] mfix_vars1('Atom', _211136)
   Call: (284) [system] var('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _211136)
^  Unify: (283) [user] mfix_vars1('Atom', '$VAR'(_215782))
   Call: (284) [system] atom('Atom')
   Exit: (284) [system] atom('Atom')
^  Call: (284) [user] symbol_concat($, _218560, 'Atom')
^  Unify: (284) [user] symbol_concat($, _218560, 'Atom')
   Call: (285) [system] atom_concat($, _218560, 'Atom')
   Fail: (285) [system] atom_concat($, _218560, 'Atom')
^  Fail: (284) [user] symbol_concat($, _218560, 'Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _211136)
^  Unify: (283) [user] mfix_vars1('Atom', _211136)
   Call: (284) [system] 'Atom'==true
^  Redo: (283) [user] mfix_vars1('Atom', _211136)
^  Unify: (283) [user] mfix_vars1('Atom', _211136)
   Call: (284) [system] 'Atom'==false
^  Redo: (283) [user] mfix_vars1('Atom', _211136)
^  Unify: (283) [user] mfix_vars1('Atom', _211136)
   Call: (284) [system] 'Atom'==[_230648, _230654]
^  Redo: (283) [user] mfix_vars1('Atom', _211136)
^  Unify: (283) [user] mfix_vars1('Atom', _211136)
   Call: (284) [system] is_list('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _211136)
^  Unify: (283) [user] mfix_vars1('Atom', _211136)
   Call: (284) [system] string('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _211136)
^  Unify: (283) [user] mfix_vars1('Atom', _211136)
   Call: (284) [system] compound('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _211136)
^  Unify: (283) [user] mfix_vars1('Atom', _211136)
^  Call: (284) [user] symbol('Atom')
^  Unify: (284) [user] symbol('Atom')
   Call: (285) [system] atom('Atom')
   Exit: (285) [system] atom('Atom')
^  Exit: (284) [user] symbol('Atom')
^  Unify: (283) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (283) [user] mfix_vars1('Atom', 'Atom')
   Call: (283) [apply] apply:maplist_([], _211138, user:mfix_vars1)
   Unify: (283) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (283) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (282) [apply] apply:maplist_(['Atom'], ['Atom'], user:mfix_vars1)
   Exit: (281) [apply] apply:maplist_(['Atom', 'Atom'], ['Atom', 'Atom'], user:mfix_vars1)
   Exit: (280) [apply] apply:maplist_(['Atom', 'Atom', 'Atom'], ['Atom', 'Atom', 'Atom'], user:mfix_vars1)
   Exit: (279) [apply] apply:maplist_([->, 'Atom', 'Atom', 'Atom'], [->, 'Atom', 'Atom', 'Atom'], user:mfix_vars1)
^  Exit: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Atom', 'Atom'], [->, 'Atom', 'Atom', 'Atom'])
^  Exit: (277) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom'], [->, 'Atom', 'Atom', 'Atom'])
   Call: (277) [apply] apply:maplist_([], _51440, user:mfix_vars1)
   Unify: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (276) [apply] apply:maplist_([[->, 'Atom', 'Atom', 'Atom']], [[->, 'Atom', 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (275) [apply] apply:maplist_([cons, [->, 'Atom', 'Atom', 'Atom']], [cons, [->, 'Atom', 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']], user:mfix_vars1)
^  Exit: (273) [apply] apply:maplist(user:mfix_vars1, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Exit: (272) [user] mfix_vars1([:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Exit: (271) [system] call(user:mfix_vars1, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Exit: (270) [system] once(user:call(mfix_vars1, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']]))
   Call: (270) [system] [:, cons, [->, 'Atom', 'Atom', 'Atom']]\=@=[:, cons, [->, 'Atom', 'Atom', 'Atom']]
^  Redo: (269) [user] trly(mfix_vars1, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _5982)
^  Unify: (269) [user] trly(mfix_vars1, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Exit: (269) [user] trly(mfix_vars1, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Exit: (268) [system] once(user:trly(mfix_vars1, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_c, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _271558))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_c, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _271558))
^  Call: (268) [user] once(user:trly(cons_to_c, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _271558))
^  Unify: (268) [system] once(user:trly(cons_to_c, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _271558))
^  Call: (269) [user] trly(cons_to_c, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _271558)
^  Unify: (269) [user] trly(cons_to_c, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _271558)
^  Call: (270) [user] once(call(cons_to_c, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _277144))
^  Unify: (270) [system] once(user:call(cons_to_c, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _277144))
^  Call: (271) [user] call(cons_to_c, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _277144)
^  Unify: (271) [system] call(user:cons_to_c, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _277144)
^  Call: (272) [user] cons_to_c([:, cons, [->, 'Atom', 'Atom', 'Atom']], _277144)
^  Unify: (272) [user] cons_to_c([:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_c([:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Exit: (271) [system] call(user:cons_to_c, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Exit: (270) [system] once(user:call(cons_to_c, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']]))
   Call: (270) [system] [:, cons, [->, 'Atom', 'Atom', 'Atom']]\=@=[:, cons, [->, 'Atom', 'Atom', 'Atom']]
^  Redo: (269) [user] trly(cons_to_c, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _271558)
^  Unify: (269) [user] trly(cons_to_c, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Exit: (269) [user] trly(cons_to_c, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Exit: (268) [system] once(user:trly(cons_to_c, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_c, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_l, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _5962))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_l, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _5962))
^  Call: (268) [user] once(user:trly(cons_to_l, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _5962))
^  Unify: (268) [system] once(user:trly(cons_to_l, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _5962))
^  Call: (269) [user] trly(cons_to_l, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _5962)
^  Unify: (269) [user] trly(cons_to_l, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _5962)
^  Call: (270) [user] once(call(cons_to_l, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _299464))
^  Unify: (270) [system] once(user:call(cons_to_l, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _299464))
^  Call: (271) [user] call(cons_to_l, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _299464)
^  Unify: (271) [system] call(user:cons_to_l, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _299464)
^  Call: (272) [user] cons_to_l([:, cons, [->, 'Atom', 'Atom', 'Atom']], _299464)
^  Unify: (272) [user] cons_to_l([:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_l([:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Exit: (271) [system] call(user:cons_to_l, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Exit: (270) [system] once(user:call(cons_to_l, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']]))
   Call: (270) [system] [:, cons, [->, 'Atom', 'Atom', 'Atom']]\=@=[:, cons, [->, 'Atom', 'Atom', 'Atom']]
^  Redo: (269) [user] trly(cons_to_l, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _5962)
^  Unify: (269) [user] trly(cons_to_l, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Exit: (269) [user] trly(cons_to_l, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Exit: (268) [system] once(user:trly(cons_to_l, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_l, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']]))
^  Exit: (266) [user] untyped_to_metta([:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Exit: (265) [system] call(user:untyped_to_metta, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Exit: (264) [system] once(user:call(untyped_to_metta, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']]))
   Call: (264) [system] [:, cons, [->, 'Atom', 'Atom', 'Atom']]\=@=[:, cons, [->, 'Atom', 'Atom', 'Atom']]
^  Redo: (263) [user] trly(untyped_to_metta, [:, cons, [->, 'Atom', 'Atom', 'Atom']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Exit: (263) [user] trly(untyped_to_metta, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Exit: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, cons, [->, 'Atom', 'Atom', 'Atom']])
   Call: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, cons, [->, 'Atom', 'Atom', 'Atom']])))
   Unify: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, cons, [->, 'Atom', 'Atom', 'Atom']])))
   Exit: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, cons, [->, 'Atom', 'Atom', 'Atom']])))
^  Exit: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Exit: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, cons, [->, 'Atom', 'Atom', 'Atom']])
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, cons, [->, 'Atom', 'Atom', 'Atom']])))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, cons, [->, 'Atom', 'Atom', 'Atom']])))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, cons, [->, 'Atom', 'Atom', 'Atom']])))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), [:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Call: (257) [user] subst_vars([:, cons, [->, 'Atom', 'Atom', 'Atom']], _333772, [], _333774)
^  Unify: (257) [user] subst_vars([:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']], [], [])
   Call: (258) [system] var([:, cons, [->, 'Atom', 'Atom', 'Atom']])
^  Redo: (257) [user] subst_vars([:, cons, [->, 'Atom', 'Atom', 'Atom']], _333772, [], _333774)
^  Unify: (257) [user] subst_vars([:, cons, [->, 'Atom', 'Atom', 'Atom']], [_337510|_337512], [], _333774)
^  Call: (258) [user] subst_vars(:, _337510, [], _338450)
^  Unify: (258) [user] subst_vars(:, :, [], [])
   Call: (259) [system] var(:)
^  Redo: (258) [user] subst_vars(:, _337510, [], _338450)
^  Unify: (258) [user] subst_vars(:, _337510, [], _338450)
   Call: (259) [system] atom(:)
   Exit: (259) [system] atom(:)
^  Call: (259) [user] symbol_concat($, _344968, :)
^  Unify: (259) [user] symbol_concat($, _344968, :)
   Call: (260) [system] atom_concat($, _344968, :)
   Fail: (260) [system] atom_concat($, _344968, :)
^  Fail: (259) [user] symbol_concat($, _344968, :)
^  Redo: (258) [user] subst_vars(:, _337510, [], _338450)
^  Unify: (258) [user] subst_vars(:, _337510, [], _338450)
   Call: (259) [system] compound(:)
^  Redo: (258) [user] subst_vars(:, _337510, [], _338450)
^  Unify: (258) [user] subst_vars(:, :, [], [])
^  Exit: (258) [user] subst_vars(:, :, [], [])
^  Call: (258) [user] subst_vars([cons, [->, 'Atom', 'Atom', 'Atom']], _337512, [], _333774)
^  Unify: (258) [user] subst_vars([cons, [->, 'Atom', 'Atom', 'Atom']], [cons, [->, 'Atom', 'Atom', 'Atom']], [], [])
   Call: (259) [system] var([cons, [->, 'Atom', 'Atom', 'Atom']])
^  Redo: (258) [user] subst_vars([cons, [->, 'Atom', 'Atom', 'Atom']], _337512, [], _333774)
^  Unify: (258) [user] subst_vars([cons, [->, 'Atom', 'Atom', 'Atom']], [_358968|_358970], [], _333774)
^  Call: (259) [user] subst_vars(cons, _358968, [], _359908)
^  Unify: (259) [user] subst_vars(cons, cons, [], [])
   Call: (260) [system] var(cons)
^  Redo: (259) [user] subst_vars(cons, _358968, [], _359908)
^  Unify: (259) [user] subst_vars(cons, _358968, [], _359908)
   Call: (260) [system] atom(cons)
   Exit: (260) [system] atom(cons)
^  Call: (260) [user] symbol_concat($, _366426, cons)
^  Unify: (260) [user] symbol_concat($, _366426, cons)
   Call: (261) [system] atom_concat($, _366426, cons)
   Fail: (261) [system] atom_concat($, _366426, cons)
^  Fail: (260) [user] symbol_concat($, _366426, cons)
^  Redo: (259) [user] subst_vars(cons, _358968, [], _359908)
^  Unify: (259) [user] subst_vars(cons, _358968, [], _359908)
   Call: (260) [system] compound(cons)
^  Redo: (259) [user] subst_vars(cons, _358968, [], _359908)
^  Unify: (259) [user] subst_vars(cons, cons, [], [])
^  Exit: (259) [user] subst_vars(cons, cons, [], [])
^  Call: (259) [user] subst_vars([[->, 'Atom', 'Atom', 'Atom']], _358970, [], _333774)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Atom', 'Atom']], [[->, 'Atom', 'Atom', 'Atom']], [], [])
   Call: (260) [system] var([[->, 'Atom', 'Atom', 'Atom']])
^  Redo: (259) [user] subst_vars([[->, 'Atom', 'Atom', 'Atom']], _358970, [], _333774)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Atom', 'Atom']], [_380426|_380428], [], _333774)
^  Call: (260) [user] subst_vars([->, 'Atom', 'Atom', 'Atom'], _380426, [], _381366)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Atom', 'Atom'], [->, 'Atom', 'Atom', 'Atom'], [], [])
   Call: (261) [system] var([->, 'Atom', 'Atom', 'Atom'])
^  Redo: (260) [user] subst_vars([->, 'Atom', 'Atom', 'Atom'], _380426, [], _381366)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Atom', 'Atom'], [_385102|_385104], [], _381366)
^  Call: (261) [user] subst_vars(->, _385102, [], _386042)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
   Call: (262) [system] var(->)
^  Redo: (261) [user] subst_vars(->, _385102, [], _386042)
^  Unify: (261) [user] subst_vars(->, _385102, [], _386042)
   Call: (262) [system] atom(->)
   Exit: (262) [system] atom(->)
^  Call: (262) [user] symbol_concat($, _392560, ->)
^  Unify: (262) [user] symbol_concat($, _392560, ->)
   Call: (263) [system] atom_concat($, _392560, ->)
   Fail: (263) [system] atom_concat($, _392560, ->)
^  Fail: (262) [user] symbol_concat($, _392560, ->)
^  Redo: (261) [user] subst_vars(->, _385102, [], _386042)
^  Unify: (261) [user] subst_vars(->, _385102, [], _386042)
   Call: (262) [system] compound(->)
^  Redo: (261) [user] subst_vars(->, _385102, [], _386042)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
^  Exit: (261) [user] subst_vars(->, ->, [], [])
^  Call: (261) [user] subst_vars(['Atom', 'Atom', 'Atom'], _385104, [], _381366)
^  Unify: (261) [user] subst_vars(['Atom', 'Atom', 'Atom'], ['Atom', 'Atom', 'Atom'], [], [])
   Call: (262) [system] var(['Atom', 'Atom', 'Atom'])
^  Redo: (261) [user] subst_vars(['Atom', 'Atom', 'Atom'], _385104, [], _381366)
^  Unify: (261) [user] subst_vars(['Atom', 'Atom', 'Atom'], [_406560|_406562], [], _381366)
^  Call: (262) [user] subst_vars('Atom', _406560, [], _407500)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (263) [system] var('Atom')
^  Redo: (262) [user] subst_vars('Atom', _406560, [], _407500)
^  Unify: (262) [user] subst_vars('Atom', _406560, [], _407500)
   Call: (263) [system] atom('Atom')
   Exit: (263) [system] atom('Atom')
^  Call: (263) [user] symbol_concat($, _414018, 'Atom')
^  Unify: (263) [user] symbol_concat($, _414018, 'Atom')
   Call: (264) [system] atom_concat($, _414018, 'Atom')
   Fail: (264) [system] atom_concat($, _414018, 'Atom')
^  Fail: (263) [user] symbol_concat($, _414018, 'Atom')
^  Redo: (262) [user] subst_vars('Atom', _406560, [], _407500)
^  Unify: (262) [user] subst_vars('Atom', _406560, [], _407500)
   Call: (263) [system] compound('Atom')
^  Redo: (262) [user] subst_vars('Atom', _406560, [], _407500)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (262) [user] subst_vars(['Atom', 'Atom'], _406562, [], _381366)
^  Unify: (262) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
   Call: (263) [system] var(['Atom', 'Atom'])
^  Redo: (262) [user] subst_vars(['Atom', 'Atom'], _406562, [], _381366)
^  Unify: (262) [user] subst_vars(['Atom', 'Atom'], [_428018|_428020], [], _381366)
^  Call: (263) [user] subst_vars('Atom', _428018, [], _428958)
^  Unify: (263) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (264) [system] var('Atom')
^  Redo: (263) [user] subst_vars('Atom', _428018, [], _428958)
^  Unify: (263) [user] subst_vars('Atom', _428018, [], _428958)
   Call: (264) [system] atom('Atom')
   Exit: (264) [system] atom('Atom')
^  Call: (264) [user] symbol_concat($, _435476, 'Atom')
^  Unify: (264) [user] symbol_concat($, _435476, 'Atom')
   Call: (265) [system] atom_concat($, _435476, 'Atom')
   Fail: (265) [system] atom_concat($, _435476, 'Atom')
^  Fail: (264) [user] symbol_concat($, _435476, 'Atom')
^  Redo: (263) [user] subst_vars('Atom', _428018, [], _428958)
^  Unify: (263) [user] subst_vars('Atom', _428018, [], _428958)
   Call: (264) [system] compound('Atom')
^  Redo: (263) [user] subst_vars('Atom', _428018, [], _428958)
^  Unify: (263) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (263) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (263) [user] subst_vars(['Atom'], _428020, [], _381366)
^  Unify: (263) [user] subst_vars(['Atom'], ['Atom'], [], [])
   Call: (264) [system] var(['Atom'])
^  Redo: (263) [user] subst_vars(['Atom'], _428020, [], _381366)
^  Unify: (263) [user] subst_vars(['Atom'], [_449476|_449478], [], _381366)
^  Call: (264) [user] subst_vars('Atom', _449476, [], _450416)
^  Unify: (264) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (265) [system] var('Atom')
^  Redo: (264) [user] subst_vars('Atom', _449476, [], _450416)
^  Unify: (264) [user] subst_vars('Atom', _449476, [], _450416)
   Call: (265) [system] atom('Atom')
   Exit: (265) [system] atom('Atom')
^  Call: (265) [user] symbol_concat($, _456934, 'Atom')
^  Unify: (265) [user] symbol_concat($, _456934, 'Atom')
   Call: (266) [system] atom_concat($, _456934, 'Atom')
   Fail: (266) [system] atom_concat($, _456934, 'Atom')
^  Fail: (265) [user] symbol_concat($, _456934, 'Atom')
^  Redo: (264) [user] subst_vars('Atom', _449476, [], _450416)
^  Unify: (264) [user] subst_vars('Atom', _449476, [], _450416)
   Call: (265) [system] compound('Atom')
^  Redo: (264) [user] subst_vars('Atom', _449476, [], _450416)
^  Unify: (264) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (264) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (264) [user] subst_vars([], _449478, [], _381366)
^  Unify: (264) [user] subst_vars([], [], [], [])
   Call: (265) [system] var([])
^  Redo: (264) [user] subst_vars([], _449478, [], _381366)
^  Unify: (264) [user] subst_vars([], [], [], [])
^  Exit: (264) [user] subst_vars([], [], [], [])
^  Exit: (263) [user] subst_vars(['Atom'], ['Atom'], [], [])
^  Exit: (262) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
^  Exit: (261) [user] subst_vars(['Atom', 'Atom', 'Atom'], ['Atom', 'Atom', 'Atom'], [], [])
^  Exit: (260) [user] subst_vars([->, 'Atom', 'Atom', 'Atom'], [->, 'Atom', 'Atom', 'Atom'], [], [])
^  Call: (260) [user] subst_vars([], _380428, [], _333774)
^  Unify: (260) [user] subst_vars([], [], [], [])
   Call: (261) [system] var([])
^  Redo: (260) [user] subst_vars([], _380428, [], _333774)
^  Unify: (260) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([], [], [], [])
^  Exit: (259) [user] subst_vars([[->, 'Atom', 'Atom', 'Atom']], [[->, 'Atom', 'Atom', 'Atom']], [], [])
^  Exit: (258) [user] subst_vars([cons, [->, 'Atom', 'Atom', 'Atom']], [cons, [->, 'Atom', 'Atom', 'Atom']], [], [])
^  Exit: (257) [user] subst_vars([:, cons, [->, 'Atom', 'Atom', 'Atom']], [:, cons, [->, 'Atom', 'Atom', 'Atom']], [], [])
   Call: (257) [system] _484960=metta_file_buffer(+, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(237, 9, 39, 237))
   Exit: (257) [system] metta_file_buffer(+, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(237, 9, 39, 237))=metta_file_buffer(+, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(237, 9, 39, 237))
^  Call: (257) [user] assertz(metta_file_buffer(+, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(237, 9, 39, 237)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(237, 9, 39, 237)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(237, 9, 39, 237))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(237, 9, 39, 237))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(237, 9, 39, 237))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, cons, [->, 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(237, 9, 39, 237))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
   Redo: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _18484)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _19422))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _19422)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 266)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _18484)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _18484)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_18484))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_18484))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_18484))
   Exit: (259) [system] nonvar(position(_18484))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(266, 10, 28, 266)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(266, 10, 28, 266))
   Call: (257) [user] current_read_mode(file, _38902)
   Unify: (257) [user] current_read_mode(file, _38902)
   Call: (258) [system] nb_current(file_mode, _38902)
   Redo: (257) [user] current_read_mode(file, _38902)
   Call: (258) [system] _38902=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _45352)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _45352)
^  Call: (258) [user] clause(t_l:s_reader_info(_45352), _47298, _47220)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _45352)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _45352)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _45352)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _45352)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _45352)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _45352)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _45352)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _45352)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _61128)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (260) [system] char_type('\n', space)
   Exit: (260) [system] char_type('\n', space)
   Call: (260) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (260) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _45352)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _45352)
   Call: (261) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _45352)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _45352)
   Call: (261) [system] peek_char((0x55aefe44e2f0), _71334)
   Exit: (261) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (261) [system] char_type('(', space)
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _45352)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _45352)
^  Call: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (262) [system] string((0x55aefe44e2f0))
^  Redo: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _45352)
^  Unify: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _45352)
^  Call: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _45352)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _45352)
   Call: (263) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _45352)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _45352)
   Call: (263) [system] peek_char((0x55aefe44e2f0), _87088)
   Exit: (263) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (263) [system] char_type('(', space)
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _45352)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _45352)
   Call: (263) [system] _91730=(0x55aefe44e2f0)
   Exit: (263) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (263) [user] once((read_position((0x55aefe44e2f0), _93598, _93600, _93602, _93604), read_sexpr((0x55aefe44e2f0), _93616), assertz(metta_file_comment(_93598, _93600, _93602, _93616, _93604))))
^  Unify: (263) [system] once(user:(read_position((0x55aefe44e2f0), _93598, _93600, _93602, _93604), read_sexpr((0x55aefe44e2f0), _93616), assertz(metta_file_comment(_93598, _93600, _93602, _93616, _93604))))
^  Call: (265) [user] read_position((0x55aefe44e2f0), _93598, _93600, _93602, _93604)
^  Unify: (265) [user] read_position((0x55aefe44e2f0), _93598, _93600, _93602, _93604)
   Call: (266) [system] stream_property((0x55aefe44e2f0), position(_93604))
   Unify: (266) [system] stream_property((0x55aefe44e2f0), position(_93604))
   Call: (267) [system] nonvar((0x55aefe44e2f0))
   Exit: (267) [system] nonvar((0x55aefe44e2f0))
   Call: (267) [system] nonvar(position(_93604))
   Exit: (267) [system] nonvar(position(_93604))
   Exit: (266) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(267, 11, 0, 267)))
   Call: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(267, 11, 0, 267), _93598)
   Unify: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(267, 11, 0, 267), _93598)
   Call: (267) [system] nonvar(line_count)
   Exit: (267) [system] nonvar(line_count)
   Call: (267) [$syspreds] stream_position_field(line_count, _107586)
   Unify: (267) [$syspreds] stream_position_field(line_count, 2)
   Exit: (267) [$syspreds] stream_position_field(line_count, 2)
   Call: (267) [system] arg(2, '$stream_position'(267, 11, 0, 267), _93598)
   Exit: (267) [system] arg(2, '$stream_position'(267, 11, 0, 267), 11)
   Exit: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(267, 11, 0, 267), 11)
   Call: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(267, 11, 0, 267), _93600)
   Unify: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(267, 11, 0, 267), _93600)
   Call: (267) [system] nonvar(line_position)
   Exit: (267) [system] nonvar(line_position)
   Call: (267) [$syspreds] stream_position_field(line_position, _116880)
   Unify: (267) [$syspreds] stream_position_field(line_position, 3)
   Exit: (267) [$syspreds] stream_position_field(line_position, 3)
   Call: (267) [system] arg(3, '$stream_position'(267, 11, 0, 267), _93600)
   Exit: (267) [system] arg(3, '$stream_position'(267, 11, 0, 267), 0)
   Exit: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(267, 11, 0, 267), 0)
   Call: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(267, 11, 0, 267), _93602)
   Unify: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(267, 11, 0, 267), _93602)
   Call: (267) [system] nonvar(char_count)
   Exit: (267) [system] nonvar(char_count)
   Call: (267) [$syspreds] stream_position_field(char_count, _126174)
   Unify: (267) [$syspreds] stream_position_field(char_count, 1)
   Exit: (267) [$syspreds] stream_position_field(char_count, 1)
   Call: (267) [system] arg(1, '$stream_position'(267, 11, 0, 267), _93602)
   Exit: (267) [system] arg(1, '$stream_position'(267, 11, 0, 267), 267)
   Exit: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(267, 11, 0, 267), 267)
^  Exit: (265) [user] read_position((0x55aefe44e2f0), 11, 0, 267, '$stream_position'(267, 11, 0, 267))
^  Call: (265) [user] read_sexpr((0x55aefe44e2f0), _93616)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _93616)
   Call: (266) [system] string((0x55aefe44e2f0))
^  Redo: (265) [user] read_sexpr((0x55aefe44e2f0), _93616)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _93616)
^  Call: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _93616)
^  Unify: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _93616)
^  Call: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _141044)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (268) [system] '('=(;)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', 'white')
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', end_of_line)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', space)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', cntrl)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (267) [system] get_char((0x55aefe44e2f0), _157828)
   Exit: (267) [system] get_char((0x55aefe44e2f0), '(')
   Call: (267) [system] '('='('
   Exit: (267) [system] '('='('
^  Call: (267) [user] read_list(')', (0x55aefe44e2f0), _93616)
^  Unify: (267) [user] read_list(')', (0x55aefe44e2f0), _93616)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _165254)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, 'white')
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, end_of_line)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, space)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _182038)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), :)
   Call: (268) [system] (:)=')'
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _93616)
   Call: (268) [system] (:)=end_of_file
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _93616)
^  Call: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _187616)
^  Unify: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _187616)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _191330)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, 'white')
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, end_of_line)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, space)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, cntrl)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] get_char((0x55aefe44e2f0), _208114)
   Exit: (269) [system] get_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)='('
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _187616)
   Call: (269) [system] (:)='['
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _187616)
   Call: (269) [system] (:)='{'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _187616)
   Call: (269) [system] (:)='"'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _187616)
   Call: (269) [system] (:)=!
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _187616)
   Call: (269) [system] (:)='\''
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _187616)
   Call: (269) [system] (:)='`'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _187616)
   Call: (269) [system] (:)=end_of_file
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _187616)
^  Call: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _187616)
^  Unify: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _187616)
^  Call: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _226724)
^  Unify: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _226724)
   Call: (271) [system] peek_char((0x55aefe44e2f0), _228590)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] is_delimiter(' ')
^  Unify: (271) [user] is_delimiter(' ')
   Call: (272) [system] char_type(' ', space)
   Exit: (272) [system] char_type(' ', space)
^  Exit: (271) [user] is_delimiter(' ')
   Call: (271) [system] _226724=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (270) [user] classify_and_convert_charseq(:, [], _187616)
^  Unify: (270) [user] classify_and_convert_charseq(:, [], _187616)
^  Call: (272) [system] setup_call_cleanup('$notrace'(_239756, _239758), once(user:catch(read_from_chars([:], _187616), _239732, fail)), '$restore_trace'(_239756, _239758))
^  Unify: (272) [system] setup_call_cleanup(system:'$notrace'(_239756, _239758), system:once(user:catch(read_from_chars([:], _187616), _239732, fail)), system:'$restore_trace'(_239756, _239758))
^  Call: (273) [system] sig_atomic(system:'$notrace'(_239756, _239758))
^  Exit: (272) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([:], :), _239732, fail)), system:'$restore_trace'(3, -1))
   Call: (271) [system] atomic(:)
   Exit: (271) [system] atomic(:)
^  Exit: (270) [user] classify_and_convert_charseq(:, [], :)
^  Exit: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, :)
^  Exit: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), :)
^  Call: (268) [user] read_list(')', (0x55aefe44e2f0), _248194)
^  Unify: (268) [user] read_list(')', (0x55aefe44e2f0), _248194)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _251908)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (270) [system] ' '=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(' ')
^  Unify: (270) [user] is_like_space(' ')
   Call: (271) [system] char_type(' ', 'white')
   Exit: (271) [system] char_type(' ', 'white')
^  Exit: (270) [user] is_like_space(' ')
   Call: (270) [system] get_char((0x55aefe44e2f0), _260566)
   Exit: (270) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _264194)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), d)
   Call: (271) [system] d=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(d)
^  Unify: (271) [user] is_like_space(d)
   Call: (272) [system] char_type(d, 'white')
^  Redo: (271) [user] is_like_space(d)
^  Unify: (271) [user] is_like_space(d)
   Call: (272) [system] char_type(d, end_of_line)
^  Redo: (271) [user] is_like_space(d)
^  Unify: (271) [user] is_like_space(d)
   Call: (272) [system] char_type(d, space)
^  Redo: (271) [user] is_like_space(d)
^  Unify: (271) [user] is_like_space(d)
   Call: (272) [system] char_type(d, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _281902)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), d)
   Call: (269) [system] d=')'
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _248194)
   Call: (269) [system] d=end_of_file
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _248194)
^  Call: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _287480)
^  Unify: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _287480)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _291194)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), d)
   Call: (271) [system] d=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(d)
^  Unify: (271) [user] is_like_space(d)
   Call: (272) [system] char_type(d, 'white')
^  Redo: (271) [user] is_like_space(d)
^  Unify: (271) [user] is_like_space(d)
   Call: (272) [system] char_type(d, end_of_line)
^  Redo: (271) [user] is_like_space(d)
^  Unify: (271) [user] is_like_space(d)
   Call: (272) [system] char_type(d, space)
^  Redo: (271) [user] is_like_space(d)
^  Unify: (271) [user] is_like_space(d)
   Call: (272) [system] char_type(d, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] get_char((0x55aefe44e2f0), _307978)
   Exit: (270) [system] get_char((0x55aefe44e2f0), d)
   Call: (270) [system] d='('
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _287480)
   Call: (270) [system] d='['
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _287480)
   Call: (270) [system] d='{'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _287480)
   Call: (270) [system] d='"'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _287480)
   Call: (270) [system] d=!
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _287480)
   Call: (270) [system] d='\''
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _287480)
   Call: (270) [system] d='`'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _287480)
   Call: (270) [system] d=end_of_file
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _287480)
^  Call: (270) [user] read_symbolic(')', (0x55aefe44e2f0), d, _287480)
^  Unify: (270) [user] read_symbolic(')', (0x55aefe44e2f0), d, _287480)
^  Call: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _326588)
^  Unify: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _326588)
   Call: (272) [system] peek_char((0x55aefe44e2f0), _328454)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (272) [user] is_delimiter(e)
^  Unify: (272) [user] is_delimiter(e)
   Call: (273) [system] char_type(e, space)
^  Redo: (272) [user] is_delimiter(e)
   Call: (273) [system] arg(_334094, v('(', ')', end_of_file), e)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _326588)
   Call: (272) [system] ')'==e
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _326588)
   Call: (272) [system] get_char((0x55aefe44e2f0), e)
   Exit: (272) [system] get_char((0x55aefe44e2f0), e)
   Call: (272) [system] e=(\)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _326588)
^  Call: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _341460)
^  Unify: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _341460)
   Call: (273) [system] peek_char((0x55aefe44e2f0), _343326)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), c)
^  Call: (273) [user] is_delimiter(c)
^  Unify: (273) [user] is_delimiter(c)
   Call: (274) [system] char_type(c, space)
^  Redo: (273) [user] is_delimiter(c)
   Call: (274) [system] arg(_348966, v('(', ')', end_of_file), c)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _341460)
   Call: (273) [system] ')'==c
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _341460)
   Call: (273) [system] get_char((0x55aefe44e2f0), c)
   Exit: (273) [system] get_char((0x55aefe44e2f0), c)
   Call: (273) [system] c=(\)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _341460)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _356332)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _356332)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _358198)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (274) [user] is_delimiter(o)
^  Unify: (274) [user] is_delimiter(o)
   Call: (275) [system] char_type(o, space)
^  Redo: (274) [user] is_delimiter(o)
   Call: (275) [system] arg(_363838, v('(', ')', end_of_file), o)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _356332)
   Call: (274) [system] ')'==o
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _356332)
   Call: (274) [system] get_char((0x55aefe44e2f0), o)
   Exit: (274) [system] get_char((0x55aefe44e2f0), o)
   Call: (274) [system] o=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _356332)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _371204)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _371204)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _373070)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (275) [user] is_delimiter(n)
^  Unify: (275) [user] is_delimiter(n)
   Call: (276) [system] char_type(n, space)
^  Redo: (275) [user] is_delimiter(n)
   Call: (276) [system] arg(_378710, v('(', ')', end_of_file), n)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _371204)
   Call: (275) [system] ')'==n
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _371204)
   Call: (275) [system] get_char((0x55aefe44e2f0), n)
   Exit: (275) [system] get_char((0x55aefe44e2f0), n)
   Call: (275) [system] n=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _371204)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _386076)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _386076)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _387942)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (276) [user] is_delimiter(s)
^  Unify: (276) [user] is_delimiter(s)
   Call: (277) [system] char_type(s, space)
^  Redo: (276) [user] is_delimiter(s)
   Call: (277) [system] arg(_393582, v('(', ')', end_of_file), s)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _386076)
   Call: (276) [system] ')'==s
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _386076)
   Call: (276) [system] get_char((0x55aefe44e2f0), s)
   Exit: (276) [system] get_char((0x55aefe44e2f0), s)
   Call: (276) [system] s=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _386076)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _400948)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _400948)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _402814)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (277) [user] is_delimiter(' ')
^  Unify: (277) [user] is_delimiter(' ')
   Call: (278) [system] char_type(' ', space)
   Exit: (278) [system] char_type(' ', space)
^  Exit: (277) [user] is_delimiter(' ')
   Call: (277) [system] _400948=[]
   Exit: (277) [system] []=[]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (276) [system] _386076=[s]
   Exit: (276) [system] [s]=[s]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s])
   Call: (275) [system] _371204=[n, s]
   Exit: (275) [system] [n, s]=[n, s]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n, s])
   Call: (274) [system] _356332=[o, n, s]
   Exit: (274) [system] [o, n, s]=[o, n, s]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, n, s])
   Call: (273) [system] _341460=[c, o, n, s]
   Exit: (273) [system] [c, o, n, s]=[c, o, n, s]
^  Exit: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [c, o, n, s])
   Call: (272) [system] _326588=[e, c, o, n, s]
   Exit: (272) [system] [e, c, o, n, s]=[e, c, o, n, s]
^  Exit: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, c, o, n, s])
^  Call: (271) [user] classify_and_convert_charseq(d, [e, c, o, n, s], _287480)
^  Unify: (271) [user] classify_and_convert_charseq(d, [e, c, o, n, s], _287480)
^  Call: (273) [system] setup_call_cleanup('$notrace'(_427950, _427952), once(user:catch(read_from_chars([d, e, c, o, n, s], _287480), _427926, fail)), '$restore_trace'(_427950, _427952))
^  Unify: (273) [system] setup_call_cleanup(system:'$notrace'(_427950, _427952), system:once(user:catch(read_from_chars([d, e, c, o, n, s], _287480), _427926, fail)), system:'$restore_trace'(_427950, _427952))
^  Call: (274) [system] sig_atomic(system:'$notrace'(_427950, _427952))
^  Exit: (273) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([d, e, c, o, n, s], decons), _427926, fail)), system:'$restore_trace'(3, -1))
   Call: (272) [system] atomic(decons)
   Exit: (272) [system] atomic(decons)
^  Exit: (271) [user] classify_and_convert_charseq(d, [e, c, o, n, s], decons)
^  Exit: (270) [user] read_symbolic(')', (0x55aefe44e2f0), d, decons)
^  Exit: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), decons)
^  Call: (269) [user] read_list(')', (0x55aefe44e2f0), _436388)
^  Unify: (269) [user] read_list(')', (0x55aefe44e2f0), _436388)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _440102)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (271) [system] ' '=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(' ')
^  Unify: (271) [user] is_like_space(' ')
   Call: (272) [system] char_type(' ', 'white')
   Exit: (272) [system] char_type(' ', 'white')
^  Exit: (271) [user] is_like_space(' ')
   Call: (271) [system] get_char((0x55aefe44e2f0), _448760)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _452388)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _470096)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (270) [system] '('=')'
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _436388)
   Call: (270) [system] '('=end_of_file
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _436388)
^  Call: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _475674)
^  Unify: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _475674)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _479388)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] get_char((0x55aefe44e2f0), _496172)
   Exit: (271) [system] get_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('='('
   Exit: (271) [system] '('='('
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _475674)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _475674)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _503598)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, 'white')
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, end_of_line)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, space)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _520382)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), -)
   Call: (272) [system] (-)=')'
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _475674)
   Call: (272) [system] (-)=end_of_file
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _5992)
^  Call: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _7826)
^  Unify: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _7826)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _11540)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, 'white')
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, end_of_line)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, space)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] get_char((0x55aefe44e2f0), _28324)
   Exit: (273) [system] get_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)='('
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _7826)
   Call: (273) [system] (-)='['
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _7826)
   Call: (273) [system] (-)='{'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _7826)
   Call: (273) [system] (-)='"'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _7826)
   Call: (273) [system] (-)=!
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _7826)
   Call: (273) [system] (-)='\''
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _7826)
   Call: (273) [system] (-)='`'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _7826)
   Call: (273) [system] (-)=end_of_file
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _7826)
^  Call: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _7826)
^  Unify: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _7826)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _46934)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _46934)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _48800)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), >)
^  Call: (275) [user] is_delimiter(>)
^  Unify: (275) [user] is_delimiter(>)
   Call: (276) [system] char_type(>, space)
^  Redo: (275) [user] is_delimiter(>)
   Call: (276) [system] arg(_54440, v('(', ')', end_of_file), >)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _46934)
   Call: (275) [system] ')'==(>)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _46934)
   Call: (275) [system] get_char((0x55aefe44e2f0), >)
   Exit: (275) [system] get_char((0x55aefe44e2f0), >)
   Call: (275) [system] (>)=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _46934)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _61806)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _61806)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _63672)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] is_delimiter(' ')
^  Unify: (276) [user] is_delimiter(' ')
   Call: (277) [system] char_type(' ', space)
   Exit: (277) [system] char_type(' ', space)
^  Exit: (276) [user] is_delimiter(' ')
   Call: (276) [system] _61806=[]
   Exit: (276) [system] []=[]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (275) [system] _46934=[>]
   Exit: (275) [system] [>]=[>]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [>])
^  Call: (274) [user] classify_and_convert_charseq(-, [>], _7826)
^  Unify: (274) [user] classify_and_convert_charseq(-, [>], _7826)
^  Call: (276) [system] setup_call_cleanup('$notrace'(_77632, _77634), once(user:catch(read_from_chars([-, >], _7826), _77608, fail)), '$restore_trace'(_77632, _77634))
^  Unify: (276) [system] setup_call_cleanup(system:'$notrace'(_77632, _77634), system:once(user:catch(read_from_chars([-, >], _7826), _77608, fail)), system:'$restore_trace'(_77632, _77634))
^  Call: (277) [system] sig_atomic(system:'$notrace'(_77632, _77634))
^  Exit: (276) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([-, >], ->), _77608, fail)), system:'$restore_trace'(3, -1))
   Call: (275) [system] atomic(->)
   Exit: (275) [system] atomic(->)
^  Exit: (274) [user] classify_and_convert_charseq(-, [>], ->)
^  Exit: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, ->)
^  Exit: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), ->)
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _86070)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _86070)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _89784)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (274) [system] ' '=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(' ')
^  Unify: (274) [user] is_like_space(' ')
   Call: (275) [system] char_type(' ', 'white')
   Exit: (275) [system] char_type(' ', 'white')
^  Exit: (274) [user] is_like_space(' ')
   Call: (274) [system] get_char((0x55aefe44e2f0), _98442)
   Exit: (274) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _102070)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', 'white')
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', end_of_line)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', space)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _119778)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (273) [system] 'A'=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _86070)
   Call: (273) [system] 'A'=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _86070)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _125356)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _125356)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _129070)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', 'white')
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', end_of_line)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', space)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _145854)
   Exit: (274) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (274) [system] 'A'='('
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _125356)
   Call: (274) [system] 'A'='['
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _125356)
   Call: (274) [system] 'A'='{'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _125356)
   Call: (274) [system] 'A'='"'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _125356)
   Call: (274) [system] 'A'=!
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _125356)
   Call: (274) [system] 'A'='\''
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _125356)
   Call: (274) [system] 'A'='`'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _125356)
   Call: (274) [system] 'A'=end_of_file
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _125356)
^  Call: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _125356)
^  Unify: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _125356)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _164464)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _164464)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _166330)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (276) [user] is_delimiter(t)
^  Unify: (276) [user] is_delimiter(t)
   Call: (277) [system] char_type(t, space)
^  Redo: (276) [user] is_delimiter(t)
   Call: (277) [system] arg(_171970, v('(', ')', end_of_file), t)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _164464)
   Call: (276) [system] ')'==t
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _164464)
   Call: (276) [system] get_char((0x55aefe44e2f0), t)
   Exit: (276) [system] get_char((0x55aefe44e2f0), t)
   Call: (276) [system] t=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _164464)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _179336)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _179336)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _181202)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (277) [user] is_delimiter(o)
^  Unify: (277) [user] is_delimiter(o)
   Call: (278) [system] char_type(o, space)
^  Redo: (277) [user] is_delimiter(o)
   Call: (278) [system] arg(_186842, v('(', ')', end_of_file), o)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _179336)
   Call: (277) [system] ')'==o
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _179336)
   Call: (277) [system] get_char((0x55aefe44e2f0), o)
   Exit: (277) [system] get_char((0x55aefe44e2f0), o)
   Call: (277) [system] o=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _179336)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _194208)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _194208)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _196074)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (278) [user] is_delimiter(m)
^  Unify: (278) [user] is_delimiter(m)
   Call: (279) [system] char_type(m, space)
^  Redo: (278) [user] is_delimiter(m)
   Call: (279) [system] arg(_201714, v('(', ')', end_of_file), m)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _194208)
   Call: (278) [system] ')'==m
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _194208)
   Call: (278) [system] get_char((0x55aefe44e2f0), m)
   Exit: (278) [system] get_char((0x55aefe44e2f0), m)
   Call: (278) [system] m=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _194208)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _209080)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _209080)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _210946)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (279) [user] is_delimiter(' ')
^  Unify: (279) [user] is_delimiter(' ')
   Call: (280) [system] char_type(' ', space)
   Exit: (280) [system] char_type(' ', space)
^  Exit: (279) [user] is_delimiter(' ')
   Call: (279) [system] _209080=[]
   Exit: (279) [system] []=[]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (278) [system] _194208=[m]
   Exit: (278) [system] [m]=[m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (277) [system] _179336=[o, m]
   Exit: (277) [system] [o, m]=[o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (276) [system] _164464=[t, o, m]
   Exit: (276) [system] [t, o, m]=[t, o, m]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (275) [user] classify_and_convert_charseq('A', [t, o, m], _125356)
^  Unify: (275) [user] classify_and_convert_charseq('A', [t, o, m], _125356)
^  Call: (277) [system] setup_call_cleanup('$notrace'(_230494, _230496), once(user:catch(read_from_chars(['A', t, o, m], _125356), _230470, fail)), '$restore_trace'(_230494, _230496))
^  Unify: (277) [system] setup_call_cleanup(system:'$notrace'(_230494, _230496), system:once(user:catch(read_from_chars(['A', t, o, m], _125356), _230470, fail)), system:'$restore_trace'(_230494, _230496))
^  Call: (278) [system] sig_atomic(system:'$notrace'(_230494, _230496))
^  Exit: (277) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _125356), _230470, fail)), system:'$restore_trace'(3, -1))
   Call: (276) [system] atomic(_125356)
^  Redo: (275) [user] classify_and_convert_charseq('A', [t, o, m], _125356)
^  Unify: (275) [user] classify_and_convert_charseq('A', [t, o, m], _125356)
   Call: (276) [system] atom_chars(_125356, ['A', t, o, m])
   Exit: (276) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (275) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (273) [user] read_list(')', (0x55aefe44e2f0), _241748)
^  Unify: (273) [user] read_list(')', (0x55aefe44e2f0), _241748)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _245462)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (275) [system] ' '=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(' ')
^  Unify: (275) [user] is_like_space(' ')
   Call: (276) [system] char_type(' ', 'white')
   Exit: (276) [system] char_type(' ', 'white')
^  Exit: (275) [user] is_like_space(' ')
   Call: (275) [system] get_char((0x55aefe44e2f0), _254120)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _257748)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _275456)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (274) [system] 'A'=')'
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _241748)
   Call: (274) [system] 'A'=end_of_file
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _241748)
^  Call: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _281034)
^  Unify: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _281034)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _284748)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] get_char((0x55aefe44e2f0), _301532)
   Exit: (275) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'='('
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _281034)
   Call: (275) [system] 'A'='['
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _281034)
   Call: (275) [system] 'A'='{'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _281034)
   Call: (275) [system] 'A'='"'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _281034)
   Call: (275) [system] 'A'=!
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _281034)
   Call: (275) [system] 'A'='\''
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _281034)
   Call: (275) [system] 'A'='`'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _281034)
   Call: (275) [system] 'A'=end_of_file
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _281034)
^  Call: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _281034)
^  Unify: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _281034)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _320142)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _320142)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _322008)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (277) [user] is_delimiter(t)
^  Unify: (277) [user] is_delimiter(t)
   Call: (278) [system] char_type(t, space)
^  Redo: (277) [user] is_delimiter(t)
   Call: (278) [system] arg(_327648, v('(', ')', end_of_file), t)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _320142)
   Call: (277) [system] ')'==t
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _320142)
   Call: (277) [system] get_char((0x55aefe44e2f0), t)
   Exit: (277) [system] get_char((0x55aefe44e2f0), t)
   Call: (277) [system] t=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _320142)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _335014)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _335014)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _336880)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (278) [user] is_delimiter(o)
^  Unify: (278) [user] is_delimiter(o)
   Call: (279) [system] char_type(o, space)
^  Redo: (278) [user] is_delimiter(o)
   Call: (279) [system] arg(_342520, v('(', ')', end_of_file), o)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _335014)
   Call: (278) [system] ')'==o
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _335014)
   Call: (278) [system] get_char((0x55aefe44e2f0), o)
   Exit: (278) [system] get_char((0x55aefe44e2f0), o)
   Call: (278) [system] o=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _335014)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _349886)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _349886)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _351752)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (279) [user] is_delimiter(m)
^  Unify: (279) [user] is_delimiter(m)
   Call: (280) [system] char_type(m, space)
^  Redo: (279) [user] is_delimiter(m)
   Call: (280) [system] arg(_357392, v('(', ')', end_of_file), m)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _349886)
   Call: (279) [system] ')'==m
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _349886)
   Call: (279) [system] get_char((0x55aefe44e2f0), m)
   Exit: (279) [system] get_char((0x55aefe44e2f0), m)
   Call: (279) [system] m=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _349886)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _364758)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _364758)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _366624)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (280) [user] is_delimiter(')')
^  Unify: (280) [user] is_delimiter(')')
   Call: (281) [system] char_type(')', space)
^  Redo: (280) [user] is_delimiter(')')
   Call: (281) [system] arg(_372264, v('(', ')', end_of_file), ')')
   Exit: (281) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (280) [user] is_delimiter(')')
   Call: (280) [system] _364758=[]
   Exit: (280) [system] []=[]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (279) [system] _349886=[m]
   Exit: (279) [system] [m]=[m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (278) [system] _335014=[o, m]
   Exit: (278) [system] [o, m]=[o, m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (277) [system] _320142=[t, o, m]
   Exit: (277) [system] [t, o, m]=[t, o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (276) [user] classify_and_convert_charseq('A', [t, o, m], _281034)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _281034)
^  Call: (278) [system] setup_call_cleanup('$notrace'(_388040, _388042), once(user:catch(read_from_chars(['A', t, o, m], _281034), _388016, fail)), '$restore_trace'(_388040, _388042))
^  Unify: (278) [system] setup_call_cleanup(system:'$notrace'(_388040, _388042), system:once(user:catch(read_from_chars(['A', t, o, m], _281034), _388016, fail)), system:'$restore_trace'(_388040, _388042))
^  Call: (279) [system] sig_atomic(system:'$notrace'(_388040, _388042))
^  Exit: (278) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _281034), _388016, fail)), system:'$restore_trace'(3, -1))
   Call: (277) [system] atomic(_281034)
^  Redo: (276) [user] classify_and_convert_charseq('A', [t, o, m], _281034)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _281034)
   Call: (277) [system] atom_chars(_281034, ['A', t, o, m])
   Exit: (277) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (276) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _399294)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _399294)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _403008)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (276) [system] ')'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', 'white')
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', end_of_line)
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', space)
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _419792)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (275) [system] ')'=')'
   Exit: (275) [system] ')'=')'
   Call: (275) [system] get_char((0x55aefe44e2f0), _423582)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ')')
   Call: (275) [system] _399294=[]
   Exit: (275) [system] []=[]
^  Exit: (274) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (274) [system] _241748=['Atom']
   Exit: (274) [system] ['Atom']=['Atom']
^  Exit: (273) [user] read_list(')', (0x55aefe44e2f0), ['Atom'])
   Call: (273) [system] _86070=['Atom', 'Atom']
   Exit: (273) [system] ['Atom', 'Atom']=['Atom', 'Atom']
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Atom'])
   Call: (272) [system] _5992=[->, 'Atom', 'Atom']
   Exit: (272) [system] [->, 'Atom', 'Atom']=[->, 'Atom', 'Atom']
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [->, 'Atom', 'Atom'])
^  Exit: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), [->, 'Atom', 'Atom'])
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _437464)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _437464)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _441178)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (272) [system] ')'=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', 'white')
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', end_of_line)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', space)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _457962)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (271) [system] ')'=')'
   Exit: (271) [system] ')'=')'
   Call: (271) [system] get_char((0x55aefe44e2f0), _461752)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ')')
   Call: (271) [system] _437464=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (270) [system] _5988=[[->, 'Atom', 'Atom']]
   Exit: (270) [system] [[->, 'Atom', 'Atom']]=[[->, 'Atom', 'Atom']]
^  Exit: (269) [user] read_list(')', (0x55aefe44e2f0), [[->, 'Atom', 'Atom']])
   Call: (269) [system] _5982=[decons, [->, 'Atom', 'Atom']]
   Exit: (269) [system] [decons, [->, 'Atom', 'Atom']]=[decons, [->, 'Atom', 'Atom']]
^  Exit: (268) [user] read_list(')', (0x55aefe44e2f0), [decons, [->, 'Atom', 'Atom']])
   Call: (268) [system] _5942=[:, decons, [->, 'Atom', 'Atom']]
   Exit: (268) [system] [:, decons, [->, 'Atom', 'Atom']]=[:, decons, [->, 'Atom', 'Atom']]
^  Exit: (267) [user] read_list(')', (0x55aefe44e2f0), [:, decons, [->, 'Atom', 'Atom']])
^  Exit: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), [:, decons, [->, 'Atom', 'Atom']])
^  Exit: (265) [user] read_sexpr((0x55aefe44e2f0), [:, decons, [->, 'Atom', 'Atom']])
^  Call: (265) [user] assertz(metta_file_comment(11, 0, 267, [:, decons, [->, 'Atom', 'Atom']], '$stream_position'(267, 11, 0, 267)))
^  Exit: (265) [user] assertz(metta_file_comment(11, 0, 267, [:, decons, [->, 'Atom', 'Atom']], '$stream_position'(267, 11, 0, 267)))
^  Exit: (263) [system] once(user:(read_position((0x55aefe44e2f0), 11, 0, 267, '$stream_position'(267, 11, 0, 267)), read_sexpr((0x55aefe44e2f0), [:, decons, [->, 'Atom', 'Atom']]), assertz(metta_file_comment(11, 0, 267, [:, decons, [->, 'Atom', 'Atom']], '$stream_position'(267, 11, 0, 267)))))
   Call: (263) [system] fail
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Call: (263) [user] retract(metta_file_comment(_482126, _482128, _482130, _482132, _482134))
^  Exit: (263) [user] retract(metta_file_comment(11, 0, 267, [:, decons, [->, 'Atom', 'Atom']], '$stream_position'(267, 11, 0, 267)))
^  Call: (263) [user] trly(untyped_to_metta, [:, decons, [->, 'Atom', 'Atom']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, decons, [->, 'Atom', 'Atom']], _5908)
^  Call: (264) [user] once(call(untyped_to_metta, [:, decons, [->, 'Atom', 'Atom']], _485912))
^  Unify: (264) [system] once(user:call(untyped_to_metta, [:, decons, [->, 'Atom', 'Atom']], _485912))
^  Call: (265) [user] call(untyped_to_metta, [:, decons, [->, 'Atom', 'Atom']], _485912)
^  Unify: (265) [system] call(user:untyped_to_metta, [:, decons, [->, 'Atom', 'Atom']], _485912)
^  Call: (266) [user] untyped_to_metta([:, decons, [->, 'Atom', 'Atom']], _485912)
^  Unify: (266) [user] untyped_to_metta([:, decons, [->, 'Atom', 'Atom']], _485912)
^  Call: (267) [user] must_det_ll(trly(mfix_vars1, [:, decons, [->, 'Atom', 'Atom']], _491524))
^  Unify: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, decons, [->, 'Atom', 'Atom']], _491524))
^  Call: (268) [user] once(user:trly(mfix_vars1, [:, decons, [->, 'Atom', 'Atom']], _491524))
^  Unify: (268) [system] once(user:trly(mfix_vars1, [:, decons, [->, 'Atom', 'Atom']], _491524))
^  Call: (269) [user] trly(mfix_vars1, [:, decons, [->, 'Atom', 'Atom']], _491524)
^  Unify: (269) [user] trly(mfix_vars1, [:, decons, [->, 'Atom', 'Atom']], _491524)
^  Call: (270) [user] once(call(mfix_vars1, [:, decons, [->, 'Atom', 'Atom']], _497110))
^  Unify: (270) [system] once(user:call(mfix_vars1, [:, decons, [->, 'Atom', 'Atom']], _497110))
^  Call: (271) [user] call(mfix_vars1, [:, decons, [->, 'Atom', 'Atom']], _497110)
^  Unify: (271) [system] call(user:mfix_vars1, [:, decons, [->, 'Atom', 'Atom']], _497110)
^  Call: (272) [user] mfix_vars1([:, decons, [->, 'Atom', 'Atom']], _497110)
^  Unify: (272) [user] mfix_vars1([:, decons, [->, 'Atom', 'Atom']], _497110)
   Call: (273) [system] var([:, decons, [->, 'Atom', 'Atom']])
^  Redo: (272) [user] mfix_vars1([:, decons, [->, 'Atom', 'Atom']], _497110)
^  Unify: (272) [user] mfix_vars1([:, decons, [->, 'Atom', 'Atom']], '$VAR'(_504570))
   Call: (273) [system] atom([:, decons, [->, 'Atom', 'Atom']])
^  Redo: (272) [user] mfix_vars1([:, decons, [->, 'Atom', 'Atom']], _497110)
^  Unify: (272) [user] mfix_vars1([:, decons, [->, 'Atom', 'Atom']], _497110)
   Call: (273) [system] [:, decons, [->, 'Atom', 'Atom']]==true
^  Redo: (272) [user] mfix_vars1([:, decons, [->, 'Atom', 'Atom']], _497110)
^  Unify: (272) [user] mfix_vars1([:, decons, [->, 'Atom', 'Atom']], _497110)
   Call: (273) [system] [:, decons, [->, 'Atom', 'Atom']]==false
^  Redo: (272) [user] mfix_vars1([:, decons, [->, 'Atom', 'Atom']], _497110)
^  Unify: (272) [user] mfix_vars1([:, decons, [->, 'Atom', 'Atom']], _497110)
   Call: (273) [system] (:)=='['
^  Redo: (272) [user] mfix_vars1([:, decons, [->, 'Atom', 'Atom']], _497110)
^  Unify: (272) [user] mfix_vars1([:, decons, [->, 'Atom', 'Atom']], _497110)
   Call: (273) [system] (:)=='{'
^  Redo: (272) [user] mfix_vars1([:, decons, [->, 'Atom', 'Atom']], _497110)
^  Unify: (272) [user] mfix_vars1([:, decons, [->, 'Atom', 'Atom']], _497110)
   Call: (273) [system] is_list([decons, [->, 'Atom', 'Atom']])
   Exit: (273) [system] is_list([decons, [->, 'Atom', 'Atom']])
   Call: (273) [lists] lists:last([decons, [->, 'Atom', 'Atom']], _521264)
   Unify: (273) [lists] lists:last([decons, [->, 'Atom', 'Atom']], _521264)
   Call: (274) [lists] lists:last_([[->, 'Atom', 'Atom']], decons, _521264)
   Unify: (274) [lists] lists:last_([[->, 'Atom', 'Atom']], decons, _6004)
   Call: (275) [lists] lists:last_([], [->, 'Atom', 'Atom'], _6004)
   Unify: (275) [lists] lists:last_([], [->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
   Exit: (275) [lists] lists:last_([], [->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
   Exit: (274) [lists] lists:last_([[->, 'Atom', 'Atom']], decons, [->, 'Atom', 'Atom'])
   Exit: (273) [lists] lists:last([decons, [->, 'Atom', 'Atom']], [->, 'Atom', 'Atom'])
   Call: (273) [system] [->, 'Atom', 'Atom']=='}'
^  Redo: (272) [user] mfix_vars1([:, decons, [->, 'Atom', 'Atom']], _5990)
^  Unify: (272) [user] mfix_vars1([:, decons, [->, 'Atom', 'Atom']], _5990)
   Call: (273) [system] [:, decons, [->, 'Atom', 'Atom']]==[_14336, _14342]
^  Redo: (272) [user] mfix_vars1([:, decons, [->, 'Atom', 'Atom']], _5990)
^  Unify: (272) [user] mfix_vars1([:, decons, [->, 'Atom', 'Atom']], _5990)
   Call: (273) [system] fail
^  Redo: (272) [user] mfix_vars1([:, decons, [->, 'Atom', 'Atom']], _5990)
^  Unify: (272) [user] mfix_vars1([:, decons, [->, 'Atom', 'Atom']], _5990)
   Call: (273) [system] is_list([:, decons, [->, 'Atom', 'Atom']])
   Exit: (273) [system] is_list([:, decons, [->, 'Atom', 'Atom']])
^  Call: (273) [user] apply:maplist(mfix_vars1, [:, decons, [->, 'Atom', 'Atom']], _5990)
^  Unify: (273) [apply] apply:maplist(user:mfix_vars1, [:, decons, [->, 'Atom', 'Atom']], _5990)
   Call: (274) [apply] apply:maplist_([:, decons, [->, 'Atom', 'Atom']], _5990, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([:, decons, [->, 'Atom', 'Atom']], [_24566|_24568], user:mfix_vars1)
^  Call: (275) [user] mfix_vars1(:, _24566)
^  Unify: (275) [user] mfix_vars1(:, _24566)
   Call: (276) [system] var(:)
^  Redo: (275) [user] mfix_vars1(:, _24566)
^  Unify: (275) [user] mfix_vars1(:, '$VAR'(_29212))
   Call: (276) [system] atom(:)
   Exit: (276) [system] atom(:)
^  Call: (276) [user] symbol_concat($, _31990, :)
^  Unify: (276) [user] symbol_concat($, _31990, :)
   Call: (277) [system] atom_concat($, _31990, :)
   Fail: (277) [system] atom_concat($, _31990, :)
^  Fail: (276) [user] symbol_concat($, _31990, :)
^  Redo: (275) [user] mfix_vars1(:, _24566)
^  Unify: (275) [user] mfix_vars1(:, _24566)
   Call: (276) [system] (:)==true
^  Redo: (275) [user] mfix_vars1(:, _24566)
^  Unify: (275) [user] mfix_vars1(:, _24566)
   Call: (276) [system] (:)==false
^  Redo: (275) [user] mfix_vars1(:, _24566)
^  Unify: (275) [user] mfix_vars1(:, _24566)
   Call: (276) [system] (:)==[_44078, _44084]
^  Redo: (275) [user] mfix_vars1(:, _24566)
^  Unify: (275) [user] mfix_vars1(:, _24566)
   Call: (276) [system] is_list(:)
^  Redo: (275) [user] mfix_vars1(:, _24566)
^  Unify: (275) [user] mfix_vars1(:, _24566)
   Call: (276) [system] string(:)
^  Redo: (275) [user] mfix_vars1(:, _24566)
^  Unify: (275) [user] mfix_vars1(:, _24566)
   Call: (276) [system] compound(:)
^  Redo: (275) [user] mfix_vars1(:, _24566)
^  Unify: (275) [user] mfix_vars1(:, _24566)
^  Call: (276) [user] symbol(:)
^  Unify: (276) [user] symbol(:)
   Call: (277) [system] atom(:)
   Exit: (277) [system] atom(:)
^  Exit: (276) [user] symbol(:)
^  Unify: (275) [user] mfix_vars1(:, :)
^  Exit: (275) [user] mfix_vars1(:, :)
   Call: (275) [apply] apply:maplist_([decons, [->, 'Atom', 'Atom']], _24568, user:mfix_vars1)
   Unify: (275) [apply] apply:maplist_([decons, [->, 'Atom', 'Atom']], [_62622|_62624], user:mfix_vars1)
^  Call: (276) [user] mfix_vars1(decons, _62622)
^  Unify: (276) [user] mfix_vars1(decons, _62622)
   Call: (277) [system] var(decons)
^  Redo: (276) [user] mfix_vars1(decons, _62622)
^  Unify: (276) [user] mfix_vars1(decons, '$VAR'(_67268))
   Call: (277) [system] atom(decons)
   Exit: (277) [system] atom(decons)
^  Call: (277) [user] symbol_concat($, _70046, decons)
^  Unify: (277) [user] symbol_concat($, _70046, decons)
   Call: (278) [system] atom_concat($, _70046, decons)
   Fail: (278) [system] atom_concat($, _70046, decons)
^  Fail: (277) [user] symbol_concat($, _70046, decons)
^  Redo: (276) [user] mfix_vars1(decons, _62622)
^  Unify: (276) [user] mfix_vars1(decons, _62622)
   Call: (277) [system] decons==true
^  Redo: (276) [user] mfix_vars1(decons, _62622)
^  Unify: (276) [user] mfix_vars1(decons, _62622)
   Call: (277) [system] decons==false
^  Redo: (276) [user] mfix_vars1(decons, _62622)
^  Unify: (276) [user] mfix_vars1(decons, _62622)
   Call: (277) [system] decons==[_82134, _82140]
^  Redo: (276) [user] mfix_vars1(decons, _62622)
^  Unify: (276) [user] mfix_vars1(decons, _62622)
   Call: (277) [system] is_list(decons)
^  Redo: (276) [user] mfix_vars1(decons, _62622)
^  Unify: (276) [user] mfix_vars1(decons, _62622)
   Call: (277) [system] string(decons)
^  Redo: (276) [user] mfix_vars1(decons, _62622)
^  Unify: (276) [user] mfix_vars1(decons, _62622)
   Call: (277) [system] compound(decons)
^  Redo: (276) [user] mfix_vars1(decons, _62622)
^  Unify: (276) [user] mfix_vars1(decons, _62622)
^  Call: (277) [user] symbol(decons)
^  Unify: (277) [user] symbol(decons)
   Call: (278) [system] atom(decons)
   Exit: (278) [system] atom(decons)
^  Exit: (277) [user] symbol(decons)
^  Unify: (276) [user] mfix_vars1(decons, decons)
^  Exit: (276) [user] mfix_vars1(decons, decons)
   Call: (276) [apply] apply:maplist_([[->, 'Atom', 'Atom']], _62624, user:mfix_vars1)
   Unify: (276) [apply] apply:maplist_([[->, 'Atom', 'Atom']], [_100678|_100680], user:mfix_vars1)
^  Call: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _100678)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _100678)
   Call: (278) [system] var([->, 'Atom', 'Atom'])
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _100678)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], '$VAR'(_105324))
   Call: (278) [system] atom([->, 'Atom', 'Atom'])
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _100678)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _100678)
   Call: (278) [system] [->, 'Atom', 'Atom']==true
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _100678)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _100678)
   Call: (278) [system] [->, 'Atom', 'Atom']==false
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _100678)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _100678)
   Call: (278) [system] (->)=='['
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _100678)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _100678)
   Call: (278) [system] (->)=='{'
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _100678)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _100678)
   Call: (278) [system] is_list(['Atom', 'Atom'])
   Exit: (278) [system] is_list(['Atom', 'Atom'])
   Call: (278) [lists] lists:last(['Atom', 'Atom'], _122018)
   Unify: (278) [lists] lists:last(['Atom', 'Atom'], _122018)
   Call: (279) [lists] lists:last_(['Atom'], 'Atom', _122018)
   Unify: (279) [lists] lists:last_(['Atom'], 'Atom', _122018)
   Call: (280) [lists] lists:last_([], 'Atom', _122018)
   Unify: (280) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (280) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (279) [lists] lists:last_(['Atom'], 'Atom', 'Atom')
   Exit: (278) [lists] lists:last(['Atom', 'Atom'], 'Atom')
   Call: (278) [system] 'Atom'=='}'
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _100678)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _100678)
   Call: (278) [system] [->, 'Atom', 'Atom']==[_133182, _133188]
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _100678)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _100678)
   Call: (278) [system] fail
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _100678)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _100678)
   Call: (278) [system] is_list([->, 'Atom', 'Atom'])
   Exit: (278) [system] is_list([->, 'Atom', 'Atom'])
^  Call: (278) [user] apply:maplist(mfix_vars1, [->, 'Atom', 'Atom'], _100678)
^  Unify: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Atom'], _100678)
   Call: (279) [apply] apply:maplist_([->, 'Atom', 'Atom'], _100678, user:mfix_vars1)
   Unify: (279) [apply] apply:maplist_([->, 'Atom', 'Atom'], [_143412|_143414], user:mfix_vars1)
^  Call: (280) [user] mfix_vars1(->, _143412)
^  Unify: (280) [user] mfix_vars1(->, _143412)
   Call: (281) [system] var(->)
^  Redo: (280) [user] mfix_vars1(->, _143412)
^  Unify: (280) [user] mfix_vars1(->, '$VAR'(_148058))
   Call: (281) [system] atom(->)
   Exit: (281) [system] atom(->)
^  Call: (281) [user] symbol_concat($, _150836, ->)
^  Unify: (281) [user] symbol_concat($, _150836, ->)
   Call: (282) [system] atom_concat($, _150836, ->)
   Fail: (282) [system] atom_concat($, _150836, ->)
^  Fail: (281) [user] symbol_concat($, _150836, ->)
^  Redo: (280) [user] mfix_vars1(->, _143412)
^  Unify: (280) [user] mfix_vars1(->, _143412)
   Call: (281) [system] (->)==true
^  Redo: (280) [user] mfix_vars1(->, _143412)
^  Unify: (280) [user] mfix_vars1(->, _143412)
   Call: (281) [system] (->)==false
^  Redo: (280) [user] mfix_vars1(->, _143412)
^  Unify: (280) [user] mfix_vars1(->, _143412)
   Call: (281) [system] (->)==[_162924, _162930]
^  Redo: (280) [user] mfix_vars1(->, _143412)
^  Unify: (280) [user] mfix_vars1(->, _143412)
   Call: (281) [system] is_list(->)
^  Redo: (280) [user] mfix_vars1(->, _143412)
^  Unify: (280) [user] mfix_vars1(->, _143412)
   Call: (281) [system] string(->)
^  Redo: (280) [user] mfix_vars1(->, _143412)
^  Unify: (280) [user] mfix_vars1(->, _143412)
   Call: (281) [system] compound(->)
^  Redo: (280) [user] mfix_vars1(->, _143412)
^  Unify: (280) [user] mfix_vars1(->, _143412)
^  Call: (281) [user] symbol(->)
^  Unify: (281) [user] symbol(->)
   Call: (282) [system] atom(->)
   Exit: (282) [system] atom(->)
^  Exit: (281) [user] symbol(->)
^  Unify: (280) [user] mfix_vars1(->, ->)
^  Exit: (280) [user] mfix_vars1(->, ->)
   Call: (280) [apply] apply:maplist_(['Atom', 'Atom'], _143414, user:mfix_vars1)
   Unify: (280) [apply] apply:maplist_(['Atom', 'Atom'], [_181468|_181470], user:mfix_vars1)
^  Call: (281) [user] mfix_vars1('Atom', _181468)
^  Unify: (281) [user] mfix_vars1('Atom', _181468)
   Call: (282) [system] var('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _181468)
^  Unify: (281) [user] mfix_vars1('Atom', '$VAR'(_186114))
   Call: (282) [system] atom('Atom')
   Exit: (282) [system] atom('Atom')
^  Call: (282) [user] symbol_concat($, _188892, 'Atom')
^  Unify: (282) [user] symbol_concat($, _188892, 'Atom')
   Call: (283) [system] atom_concat($, _188892, 'Atom')
   Fail: (283) [system] atom_concat($, _188892, 'Atom')
^  Fail: (282) [user] symbol_concat($, _188892, 'Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _181468)
^  Unify: (281) [user] mfix_vars1('Atom', _181468)
   Call: (282) [system] 'Atom'==true
^  Redo: (281) [user] mfix_vars1('Atom', _181468)
^  Unify: (281) [user] mfix_vars1('Atom', _181468)
   Call: (282) [system] 'Atom'==false
^  Redo: (281) [user] mfix_vars1('Atom', _181468)
^  Unify: (281) [user] mfix_vars1('Atom', _181468)
   Call: (282) [system] 'Atom'==[_200980, _200986]
^  Redo: (281) [user] mfix_vars1('Atom', _181468)
^  Unify: (281) [user] mfix_vars1('Atom', _181468)
   Call: (282) [system] is_list('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _181468)
^  Unify: (281) [user] mfix_vars1('Atom', _181468)
   Call: (282) [system] string('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _181468)
^  Unify: (281) [user] mfix_vars1('Atom', _181468)
   Call: (282) [system] compound('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _181468)
^  Unify: (281) [user] mfix_vars1('Atom', _181468)
^  Call: (282) [user] symbol('Atom')
^  Unify: (282) [user] symbol('Atom')
   Call: (283) [system] atom('Atom')
   Exit: (283) [system] atom('Atom')
^  Exit: (282) [user] symbol('Atom')
^  Unify: (281) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (281) [user] mfix_vars1('Atom', 'Atom')
   Call: (281) [apply] apply:maplist_(['Atom'], _181470, user:mfix_vars1)
   Unify: (281) [apply] apply:maplist_(['Atom'], [_219524|_219526], user:mfix_vars1)
^  Call: (282) [user] mfix_vars1('Atom', _219524)
^  Unify: (282) [user] mfix_vars1('Atom', _219524)
   Call: (283) [system] var('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _219524)
^  Unify: (282) [user] mfix_vars1('Atom', '$VAR'(_224170))
   Call: (283) [system] atom('Atom')
   Exit: (283) [system] atom('Atom')
^  Call: (283) [user] symbol_concat($, _226948, 'Atom')
^  Unify: (283) [user] symbol_concat($, _226948, 'Atom')
   Call: (284) [system] atom_concat($, _226948, 'Atom')
   Fail: (284) [system] atom_concat($, _226948, 'Atom')
^  Fail: (283) [user] symbol_concat($, _226948, 'Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _219524)
^  Unify: (282) [user] mfix_vars1('Atom', _219524)
   Call: (283) [system] 'Atom'==true
^  Redo: (282) [user] mfix_vars1('Atom', _219524)
^  Unify: (282) [user] mfix_vars1('Atom', _219524)
   Call: (283) [system] 'Atom'==false
^  Redo: (282) [user] mfix_vars1('Atom', _219524)
^  Unify: (282) [user] mfix_vars1('Atom', _219524)
   Call: (283) [system] 'Atom'==[_239036, _239042]
^  Redo: (282) [user] mfix_vars1('Atom', _219524)
^  Unify: (282) [user] mfix_vars1('Atom', _219524)
   Call: (283) [system] is_list('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _219524)
^  Unify: (282) [user] mfix_vars1('Atom', _219524)
   Call: (283) [system] string('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _219524)
^  Unify: (282) [user] mfix_vars1('Atom', _219524)
   Call: (283) [system] compound('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _219524)
^  Unify: (282) [user] mfix_vars1('Atom', _219524)
^  Call: (283) [user] symbol('Atom')
^  Unify: (283) [user] symbol('Atom')
   Call: (284) [system] atom('Atom')
   Exit: (284) [system] atom('Atom')
^  Exit: (283) [user] symbol('Atom')
^  Unify: (282) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (282) [user] mfix_vars1('Atom', 'Atom')
   Call: (282) [apply] apply:maplist_([], _219526, user:mfix_vars1)
   Unify: (282) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (282) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (281) [apply] apply:maplist_(['Atom'], ['Atom'], user:mfix_vars1)
   Exit: (280) [apply] apply:maplist_(['Atom', 'Atom'], ['Atom', 'Atom'], user:mfix_vars1)
   Exit: (279) [apply] apply:maplist_([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'], user:mfix_vars1)
^  Exit: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
^  Exit: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
   Call: (277) [apply] apply:maplist_([], _100680, user:mfix_vars1)
   Unify: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (276) [apply] apply:maplist_([[->, 'Atom', 'Atom']], [[->, 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (275) [apply] apply:maplist_([decons, [->, 'Atom', 'Atom']], [decons, [->, 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']], user:mfix_vars1)
^  Exit: (273) [apply] apply:maplist(user:mfix_vars1, [:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']])
^  Exit: (272) [user] mfix_vars1([:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']])
^  Exit: (271) [system] call(user:mfix_vars1, [:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']])
^  Exit: (270) [system] once(user:call(mfix_vars1, [:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']]))
   Call: (270) [system] [:, decons, [->, 'Atom', 'Atom']]\=@=[:, decons, [->, 'Atom', 'Atom']]
^  Redo: (269) [user] trly(mfix_vars1, [:, decons, [->, 'Atom', 'Atom']], _5976)
^  Unify: (269) [user] trly(mfix_vars1, [:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']])
^  Exit: (269) [user] trly(mfix_vars1, [:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']])
^  Exit: (268) [system] once(user:trly(mfix_vars1, [:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_c, [:, decons, [->, 'Atom', 'Atom']], _279014))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_c, [:, decons, [->, 'Atom', 'Atom']], _279014))
^  Call: (268) [user] once(user:trly(cons_to_c, [:, decons, [->, 'Atom', 'Atom']], _279014))
^  Unify: (268) [system] once(user:trly(cons_to_c, [:, decons, [->, 'Atom', 'Atom']], _279014))
^  Call: (269) [user] trly(cons_to_c, [:, decons, [->, 'Atom', 'Atom']], _279014)
^  Unify: (269) [user] trly(cons_to_c, [:, decons, [->, 'Atom', 'Atom']], _279014)
^  Call: (270) [user] once(call(cons_to_c, [:, decons, [->, 'Atom', 'Atom']], _284600))
^  Unify: (270) [system] once(user:call(cons_to_c, [:, decons, [->, 'Atom', 'Atom']], _284600))
^  Call: (271) [user] call(cons_to_c, [:, decons, [->, 'Atom', 'Atom']], _284600)
^  Unify: (271) [system] call(user:cons_to_c, [:, decons, [->, 'Atom', 'Atom']], _284600)
^  Call: (272) [user] cons_to_c([:, decons, [->, 'Atom', 'Atom']], _284600)
^  Unify: (272) [user] cons_to_c([:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_c([:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']])
^  Exit: (271) [system] call(user:cons_to_c, [:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']])
^  Exit: (270) [system] once(user:call(cons_to_c, [:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']]))
   Call: (270) [system] [:, decons, [->, 'Atom', 'Atom']]\=@=[:, decons, [->, 'Atom', 'Atom']]
^  Redo: (269) [user] trly(cons_to_c, [:, decons, [->, 'Atom', 'Atom']], _279014)
^  Unify: (269) [user] trly(cons_to_c, [:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']])
^  Exit: (269) [user] trly(cons_to_c, [:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']])
^  Exit: (268) [system] once(user:trly(cons_to_c, [:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_c, [:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_l, [:, decons, [->, 'Atom', 'Atom']], _5956))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_l, [:, decons, [->, 'Atom', 'Atom']], _5956))
^  Call: (268) [user] once(user:trly(cons_to_l, [:, decons, [->, 'Atom', 'Atom']], _5956))
^  Unify: (268) [system] once(user:trly(cons_to_l, [:, decons, [->, 'Atom', 'Atom']], _5956))
^  Call: (269) [user] trly(cons_to_l, [:, decons, [->, 'Atom', 'Atom']], _5956)
^  Unify: (269) [user] trly(cons_to_l, [:, decons, [->, 'Atom', 'Atom']], _5956)
^  Call: (270) [user] once(call(cons_to_l, [:, decons, [->, 'Atom', 'Atom']], _306920))
^  Unify: (270) [system] once(user:call(cons_to_l, [:, decons, [->, 'Atom', 'Atom']], _306920))
^  Call: (271) [user] call(cons_to_l, [:, decons, [->, 'Atom', 'Atom']], _306920)
^  Unify: (271) [system] call(user:cons_to_l, [:, decons, [->, 'Atom', 'Atom']], _306920)
^  Call: (272) [user] cons_to_l([:, decons, [->, 'Atom', 'Atom']], _306920)
^  Unify: (272) [user] cons_to_l([:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_l([:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']])
^  Exit: (271) [system] call(user:cons_to_l, [:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']])
^  Exit: (270) [system] once(user:call(cons_to_l, [:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']]))
   Call: (270) [system] [:, decons, [->, 'Atom', 'Atom']]\=@=[:, decons, [->, 'Atom', 'Atom']]
^  Redo: (269) [user] trly(cons_to_l, [:, decons, [->, 'Atom', 'Atom']], _5956)
^  Unify: (269) [user] trly(cons_to_l, [:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']])
^  Exit: (269) [user] trly(cons_to_l, [:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']])
^  Exit: (268) [system] once(user:trly(cons_to_l, [:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_l, [:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']]))
^  Exit: (266) [user] untyped_to_metta([:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']])
^  Exit: (265) [system] call(user:untyped_to_metta, [:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']])
^  Exit: (264) [system] once(user:call(untyped_to_metta, [:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']]))
   Call: (264) [system] [:, decons, [->, 'Atom', 'Atom']]\=@=[:, decons, [->, 'Atom', 'Atom']]
^  Redo: (263) [user] trly(untyped_to_metta, [:, decons, [->, 'Atom', 'Atom']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']])
^  Exit: (263) [user] trly(untyped_to_metta, [:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']])
^  Exit: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, decons, [->, 'Atom', 'Atom']])
   Call: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, decons, [->, 'Atom', 'Atom']])))
   Unify: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, decons, [->, 'Atom', 'Atom']])))
   Exit: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, decons, [->, 'Atom', 'Atom']])))
^  Exit: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, decons, [->, 'Atom', 'Atom']])
^  Exit: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, decons, [->, 'Atom', 'Atom']])
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, decons, [->, 'Atom', 'Atom']])
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, decons, [->, 'Atom', 'Atom']])))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, decons, [->, 'Atom', 'Atom']])))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, decons, [->, 'Atom', 'Atom']])))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, decons, [->, 'Atom', 'Atom']])
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), [:, decons, [->, 'Atom', 'Atom']])
^  Call: (257) [user] subst_vars([:, decons, [->, 'Atom', 'Atom']], _341228, [], _341230)
^  Unify: (257) [user] subst_vars([:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']], [], [])
   Call: (258) [system] var([:, decons, [->, 'Atom', 'Atom']])
^  Redo: (257) [user] subst_vars([:, decons, [->, 'Atom', 'Atom']], _341228, [], _341230)
^  Unify: (257) [user] subst_vars([:, decons, [->, 'Atom', 'Atom']], [_344966|_344968], [], _341230)
^  Call: (258) [user] subst_vars(:, _344966, [], _345906)
^  Unify: (258) [user] subst_vars(:, :, [], [])
   Call: (259) [system] var(:)
^  Redo: (258) [user] subst_vars(:, _344966, [], _345906)
^  Unify: (258) [user] subst_vars(:, _344966, [], _345906)
   Call: (259) [system] atom(:)
   Exit: (259) [system] atom(:)
^  Call: (259) [user] symbol_concat($, _352424, :)
^  Unify: (259) [user] symbol_concat($, _352424, :)
   Call: (260) [system] atom_concat($, _352424, :)
   Fail: (260) [system] atom_concat($, _352424, :)
^  Fail: (259) [user] symbol_concat($, _352424, :)
^  Redo: (258) [user] subst_vars(:, _344966, [], _345906)
^  Unify: (258) [user] subst_vars(:, _344966, [], _345906)
   Call: (259) [system] compound(:)
^  Redo: (258) [user] subst_vars(:, _344966, [], _345906)
^  Unify: (258) [user] subst_vars(:, :, [], [])
^  Exit: (258) [user] subst_vars(:, :, [], [])
^  Call: (258) [user] subst_vars([decons, [->, 'Atom', 'Atom']], _344968, [], _341230)
^  Unify: (258) [user] subst_vars([decons, [->, 'Atom', 'Atom']], [decons, [->, 'Atom', 'Atom']], [], [])
   Call: (259) [system] var([decons, [->, 'Atom', 'Atom']])
^  Redo: (258) [user] subst_vars([decons, [->, 'Atom', 'Atom']], _344968, [], _341230)
^  Unify: (258) [user] subst_vars([decons, [->, 'Atom', 'Atom']], [_366424|_366426], [], _341230)
^  Call: (259) [user] subst_vars(decons, _366424, [], _367364)
^  Unify: (259) [user] subst_vars(decons, decons, [], [])
   Call: (260) [system] var(decons)
^  Redo: (259) [user] subst_vars(decons, _366424, [], _367364)
^  Unify: (259) [user] subst_vars(decons, _366424, [], _367364)
   Call: (260) [system] atom(decons)
   Exit: (260) [system] atom(decons)
^  Call: (260) [user] symbol_concat($, _373882, decons)
^  Unify: (260) [user] symbol_concat($, _373882, decons)
   Call: (261) [system] atom_concat($, _373882, decons)
   Fail: (261) [system] atom_concat($, _373882, decons)
^  Fail: (260) [user] symbol_concat($, _373882, decons)
^  Redo: (259) [user] subst_vars(decons, _366424, [], _367364)
^  Unify: (259) [user] subst_vars(decons, _366424, [], _367364)
   Call: (260) [system] compound(decons)
^  Redo: (259) [user] subst_vars(decons, _366424, [], _367364)
^  Unify: (259) [user] subst_vars(decons, decons, [], [])
^  Exit: (259) [user] subst_vars(decons, decons, [], [])
^  Call: (259) [user] subst_vars([[->, 'Atom', 'Atom']], _366426, [], _341230)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Atom']], [[->, 'Atom', 'Atom']], [], [])
   Call: (260) [system] var([[->, 'Atom', 'Atom']])
^  Redo: (259) [user] subst_vars([[->, 'Atom', 'Atom']], _366426, [], _341230)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Atom']], [_387882|_387884], [], _341230)
^  Call: (260) [user] subst_vars([->, 'Atom', 'Atom'], _387882, [], _388822)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'], [], [])
   Call: (261) [system] var([->, 'Atom', 'Atom'])
^  Redo: (260) [user] subst_vars([->, 'Atom', 'Atom'], _387882, [], _388822)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Atom'], [_392558|_392560], [], _388822)
^  Call: (261) [user] subst_vars(->, _392558, [], _393498)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
   Call: (262) [system] var(->)
^  Redo: (261) [user] subst_vars(->, _392558, [], _393498)
^  Unify: (261) [user] subst_vars(->, _392558, [], _393498)
   Call: (262) [system] atom(->)
   Exit: (262) [system] atom(->)
^  Call: (262) [user] symbol_concat($, _400016, ->)
^  Unify: (262) [user] symbol_concat($, _400016, ->)
   Call: (263) [system] atom_concat($, _400016, ->)
   Fail: (263) [system] atom_concat($, _400016, ->)
^  Fail: (262) [user] symbol_concat($, _400016, ->)
^  Redo: (261) [user] subst_vars(->, _392558, [], _393498)
^  Unify: (261) [user] subst_vars(->, _392558, [], _393498)
   Call: (262) [system] compound(->)
^  Redo: (261) [user] subst_vars(->, _392558, [], _393498)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
^  Exit: (261) [user] subst_vars(->, ->, [], [])
^  Call: (261) [user] subst_vars(['Atom', 'Atom'], _392560, [], _388822)
^  Unify: (261) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
   Call: (262) [system] var(['Atom', 'Atom'])
^  Redo: (261) [user] subst_vars(['Atom', 'Atom'], _392560, [], _388822)
^  Unify: (261) [user] subst_vars(['Atom', 'Atom'], [_414016|_414018], [], _388822)
^  Call: (262) [user] subst_vars('Atom', _414016, [], _414956)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (263) [system] var('Atom')
^  Redo: (262) [user] subst_vars('Atom', _414016, [], _414956)
^  Unify: (262) [user] subst_vars('Atom', _414016, [], _414956)
   Call: (263) [system] atom('Atom')
   Exit: (263) [system] atom('Atom')
^  Call: (263) [user] symbol_concat($, _421474, 'Atom')
^  Unify: (263) [user] symbol_concat($, _421474, 'Atom')
   Call: (264) [system] atom_concat($, _421474, 'Atom')
   Fail: (264) [system] atom_concat($, _421474, 'Atom')
^  Fail: (263) [user] symbol_concat($, _421474, 'Atom')
^  Redo: (262) [user] subst_vars('Atom', _414016, [], _414956)
^  Unify: (262) [user] subst_vars('Atom', _414016, [], _414956)
   Call: (263) [system] compound('Atom')
^  Redo: (262) [user] subst_vars('Atom', _414016, [], _414956)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (262) [user] subst_vars(['Atom'], _414018, [], _388822)
^  Unify: (262) [user] subst_vars(['Atom'], ['Atom'], [], [])
   Call: (263) [system] var(['Atom'])
^  Redo: (262) [user] subst_vars(['Atom'], _414018, [], _388822)
^  Unify: (262) [user] subst_vars(['Atom'], [_435474|_435476], [], _388822)
^  Call: (263) [user] subst_vars('Atom', _435474, [], _436414)
^  Unify: (263) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (264) [system] var('Atom')
^  Redo: (263) [user] subst_vars('Atom', _435474, [], _436414)
^  Unify: (263) [user] subst_vars('Atom', _435474, [], _436414)
   Call: (264) [system] atom('Atom')
   Exit: (264) [system] atom('Atom')
^  Call: (264) [user] symbol_concat($, _442932, 'Atom')
^  Unify: (264) [user] symbol_concat($, _442932, 'Atom')
   Call: (265) [system] atom_concat($, _442932, 'Atom')
   Fail: (265) [system] atom_concat($, _442932, 'Atom')
^  Fail: (264) [user] symbol_concat($, _442932, 'Atom')
^  Redo: (263) [user] subst_vars('Atom', _435474, [], _436414)
^  Unify: (263) [user] subst_vars('Atom', _435474, [], _436414)
   Call: (264) [system] compound('Atom')
^  Redo: (263) [user] subst_vars('Atom', _435474, [], _436414)
^  Unify: (263) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (263) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (263) [user] subst_vars([], _435476, [], _388822)
^  Unify: (263) [user] subst_vars([], [], [], [])
   Call: (264) [system] var([])
^  Redo: (263) [user] subst_vars([], _435476, [], _388822)
^  Unify: (263) [user] subst_vars([], [], [], [])
^  Exit: (263) [user] subst_vars([], [], [], [])
^  Exit: (262) [user] subst_vars(['Atom'], ['Atom'], [], [])
^  Exit: (261) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
^  Exit: (260) [user] subst_vars([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'], [], [])
^  Call: (260) [user] subst_vars([], _387884, [], _341230)
^  Unify: (260) [user] subst_vars([], [], [], [])
   Call: (261) [system] var([])
^  Redo: (260) [user] subst_vars([], _387884, [], _341230)
^  Unify: (260) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([], [], [], [])
^  Exit: (259) [user] subst_vars([[->, 'Atom', 'Atom']], [[->, 'Atom', 'Atom']], [], [])
^  Exit: (258) [user] subst_vars([decons, [->, 'Atom', 'Atom']], [decons, [->, 'Atom', 'Atom']], [], [])
^  Exit: (257) [user] subst_vars([:, decons, [->, 'Atom', 'Atom']], [:, decons, [->, 'Atom', 'Atom']], [], [])
   Call: (257) [system] _470022=metta_file_buffer(+, [:, decons, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(266, 10, 28, 266))
   Exit: (257) [system] metta_file_buffer(+, [:, decons, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(266, 10, 28, 266))=metta_file_buffer(+, [:, decons, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(266, 10, 28, 266))
^  Call: (257) [user] assertz(metta_file_buffer(+, [:, decons, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(266, 10, 28, 266)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, [:, decons, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(266, 10, 28, 266)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, decons, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(266, 10, 28, 266))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, decons, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(266, 10, 28, 266))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, decons, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(266, 10, 28, 266))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, decons, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(266, 10, 28, 266))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
   Redo: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _520816)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _521754))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _5904)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 292)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _5894)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _5894)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_5894))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_5894))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_5894))
   Exit: (259) [system] nonvar(position(_5894))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(292, 11, 25, 292)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(292, 11, 25, 292))
   Call: (257) [user] current_read_mode(file, _23200)
   Unify: (257) [user] current_read_mode(file, _23200)
   Call: (258) [system] nb_current(file_mode, _23200)
   Redo: (257) [user] current_read_mode(file, _23200)
   Call: (258) [system] _23200=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _29650)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _29650)
^  Call: (258) [user] clause(t_l:s_reader_info(_29650), _31596, _31518)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _29650)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _29650)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _29650)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _29650)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _29650)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _29650)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _29650)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _29650)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _45426)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (260) [system] char_type('\n', space)
   Exit: (260) [system] char_type('\n', space)
   Call: (260) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (260) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _29650)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _29650)
   Call: (261) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _29650)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _29650)
   Call: (261) [system] peek_char((0x55aefe44e2f0), _55632)
   Exit: (261) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (261) [system] char_type('(', space)
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _29650)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _29650)
^  Call: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (262) [system] string((0x55aefe44e2f0))
^  Redo: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _29650)
^  Unify: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _29650)
^  Call: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _29650)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _29650)
   Call: (263) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _29650)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _29650)
   Call: (263) [system] peek_char((0x55aefe44e2f0), _71386)
   Exit: (263) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (263) [system] char_type('(', space)
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _29650)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _29650)
   Call: (263) [system] _76028=(0x55aefe44e2f0)
   Exit: (263) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (263) [user] once((read_position((0x55aefe44e2f0), _77896, _77898, _77900, _77902), read_sexpr((0x55aefe44e2f0), _77914), assertz(metta_file_comment(_77896, _77898, _77900, _77914, _77902))))
^  Unify: (263) [system] once(user:(read_position((0x55aefe44e2f0), _77896, _77898, _77900, _77902), read_sexpr((0x55aefe44e2f0), _77914), assertz(metta_file_comment(_77896, _77898, _77900, _77914, _77902))))
^  Call: (265) [user] read_position((0x55aefe44e2f0), _77896, _77898, _77900, _77902)
^  Unify: (265) [user] read_position((0x55aefe44e2f0), _77896, _77898, _77900, _77902)
   Call: (266) [system] stream_property((0x55aefe44e2f0), position(_77902))
   Unify: (266) [system] stream_property((0x55aefe44e2f0), position(_77902))
   Call: (267) [system] nonvar((0x55aefe44e2f0))
   Exit: (267) [system] nonvar((0x55aefe44e2f0))
   Call: (267) [system] nonvar(position(_77902))
   Exit: (267) [system] nonvar(position(_77902))
   Exit: (266) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(293, 12, 0, 293)))
   Call: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(293, 12, 0, 293), _77896)
   Unify: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(293, 12, 0, 293), _77896)
   Call: (267) [system] nonvar(line_count)
   Exit: (267) [system] nonvar(line_count)
   Call: (267) [$syspreds] stream_position_field(line_count, _91884)
   Unify: (267) [$syspreds] stream_position_field(line_count, 2)
   Exit: (267) [$syspreds] stream_position_field(line_count, 2)
   Call: (267) [system] arg(2, '$stream_position'(293, 12, 0, 293), _77896)
   Exit: (267) [system] arg(2, '$stream_position'(293, 12, 0, 293), 12)
   Exit: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(293, 12, 0, 293), 12)
   Call: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(293, 12, 0, 293), _77898)
   Unify: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(293, 12, 0, 293), _77898)
   Call: (267) [system] nonvar(line_position)
   Exit: (267) [system] nonvar(line_position)
   Call: (267) [$syspreds] stream_position_field(line_position, _101178)
   Unify: (267) [$syspreds] stream_position_field(line_position, 3)
   Exit: (267) [$syspreds] stream_position_field(line_position, 3)
   Call: (267) [system] arg(3, '$stream_position'(293, 12, 0, 293), _77898)
   Exit: (267) [system] arg(3, '$stream_position'(293, 12, 0, 293), 0)
   Exit: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(293, 12, 0, 293), 0)
   Call: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(293, 12, 0, 293), _77900)
   Unify: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(293, 12, 0, 293), _77900)
   Call: (267) [system] nonvar(char_count)
   Exit: (267) [system] nonvar(char_count)
   Call: (267) [$syspreds] stream_position_field(char_count, _110472)
   Unify: (267) [$syspreds] stream_position_field(char_count, 1)
   Exit: (267) [$syspreds] stream_position_field(char_count, 1)
   Call: (267) [system] arg(1, '$stream_position'(293, 12, 0, 293), _77900)
   Exit: (267) [system] arg(1, '$stream_position'(293, 12, 0, 293), 293)
   Exit: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(293, 12, 0, 293), 293)
^  Exit: (265) [user] read_position((0x55aefe44e2f0), 12, 0, 293, '$stream_position'(293, 12, 0, 293))
^  Call: (265) [user] read_sexpr((0x55aefe44e2f0), _77914)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _77914)
   Call: (266) [system] string((0x55aefe44e2f0))
^  Redo: (265) [user] read_sexpr((0x55aefe44e2f0), _77914)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _77914)
^  Call: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _77914)
^  Unify: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _77914)
^  Call: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _125342)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (268) [system] '('=(;)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', 'white')
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', end_of_line)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', space)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', cntrl)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (267) [system] get_char((0x55aefe44e2f0), _142126)
   Exit: (267) [system] get_char((0x55aefe44e2f0), '(')
   Call: (267) [system] '('='('
   Exit: (267) [system] '('='('
^  Call: (267) [user] read_list(')', (0x55aefe44e2f0), _77914)
^  Unify: (267) [user] read_list(')', (0x55aefe44e2f0), _77914)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _149552)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, 'white')
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, end_of_line)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, space)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _166336)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), :)
   Call: (268) [system] (:)=')'
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _77914)
   Call: (268) [system] (:)=end_of_file
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _77914)
^  Call: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _171914)
^  Unify: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _171914)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _175628)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, 'white')
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, end_of_line)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, space)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, cntrl)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] get_char((0x55aefe44e2f0), _192412)
   Exit: (269) [system] get_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)='('
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _171914)
   Call: (269) [system] (:)='['
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _171914)
   Call: (269) [system] (:)='{'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _171914)
   Call: (269) [system] (:)='"'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _171914)
   Call: (269) [system] (:)=!
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _171914)
   Call: (269) [system] (:)='\''
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _171914)
   Call: (269) [system] (:)='`'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _171914)
   Call: (269) [system] (:)=end_of_file
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _171914)
^  Call: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _171914)
^  Unify: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _171914)
^  Call: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _211022)
^  Unify: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _211022)
   Call: (271) [system] peek_char((0x55aefe44e2f0), _212888)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] is_delimiter(' ')
^  Unify: (271) [user] is_delimiter(' ')
   Call: (272) [system] char_type(' ', space)
   Exit: (272) [system] char_type(' ', space)
^  Exit: (271) [user] is_delimiter(' ')
   Call: (271) [system] _211022=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (270) [user] classify_and_convert_charseq(:, [], _171914)
^  Unify: (270) [user] classify_and_convert_charseq(:, [], _171914)
^  Call: (272) [system] setup_call_cleanup('$notrace'(_224054, _224056), once(user:catch(read_from_chars([:], _171914), _224030, fail)), '$restore_trace'(_224054, _224056))
^  Unify: (272) [system] setup_call_cleanup(system:'$notrace'(_224054, _224056), system:once(user:catch(read_from_chars([:], _171914), _224030, fail)), system:'$restore_trace'(_224054, _224056))
^  Call: (273) [system] sig_atomic(system:'$notrace'(_224054, _224056))
^  Exit: (272) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([:], :), _224030, fail)), system:'$restore_trace'(3, -1))
   Call: (271) [system] atomic(:)
   Exit: (271) [system] atomic(:)
^  Exit: (270) [user] classify_and_convert_charseq(:, [], :)
^  Exit: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, :)
^  Exit: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), :)
^  Call: (268) [user] read_list(')', (0x55aefe44e2f0), _232492)
^  Unify: (268) [user] read_list(')', (0x55aefe44e2f0), _232492)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _236206)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (270) [system] ' '=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(' ')
^  Unify: (270) [user] is_like_space(' ')
   Call: (271) [system] char_type(' ', 'white')
   Exit: (271) [system] char_type(' ', 'white')
^  Exit: (270) [user] is_like_space(' ')
   Call: (270) [system] get_char((0x55aefe44e2f0), _244864)
   Exit: (270) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _248492)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), c)
   Call: (271) [system] c=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, 'white')
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, end_of_line)
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, space)
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _266200)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), c)
   Call: (269) [system] c=')'
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _232492)
   Call: (269) [system] c=end_of_file
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _232492)
^  Call: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _271778)
^  Unify: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _271778)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _275492)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), c)
   Call: (271) [system] c=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, 'white')
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, end_of_line)
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, space)
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] get_char((0x55aefe44e2f0), _292276)
   Exit: (270) [system] get_char((0x55aefe44e2f0), c)
   Call: (270) [system] c='('
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _271778)
   Call: (270) [system] c='['
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _271778)
   Call: (270) [system] c='{'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _271778)
   Call: (270) [system] c='"'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _271778)
   Call: (270) [system] c=!
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _271778)
   Call: (270) [system] c='\''
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _271778)
   Call: (270) [system] c='`'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _271778)
   Call: (270) [system] c=end_of_file
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _271778)
^  Call: (270) [user] read_symbolic(')', (0x55aefe44e2f0), c, _271778)
^  Unify: (270) [user] read_symbolic(')', (0x55aefe44e2f0), c, _271778)
^  Call: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _310886)
^  Unify: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _310886)
   Call: (272) [system] peek_char((0x55aefe44e2f0), _312752)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (272) [user] is_delimiter(o)
^  Unify: (272) [user] is_delimiter(o)
   Call: (273) [system] char_type(o, space)
^  Redo: (272) [user] is_delimiter(o)
   Call: (273) [system] arg(_318392, v('(', ')', end_of_file), o)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _310886)
   Call: (272) [system] ')'==o
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _310886)
   Call: (272) [system] get_char((0x55aefe44e2f0), o)
   Exit: (272) [system] get_char((0x55aefe44e2f0), o)
   Call: (272) [system] o=(\)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _310886)
^  Call: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _325758)
^  Unify: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _325758)
   Call: (273) [system] peek_char((0x55aefe44e2f0), _327624)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (273) [user] is_delimiter(l)
^  Unify: (273) [user] is_delimiter(l)
   Call: (274) [system] char_type(l, space)
^  Redo: (273) [user] is_delimiter(l)
   Call: (274) [system] arg(_333264, v('(', ')', end_of_file), l)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _325758)
   Call: (273) [system] ')'==l
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _325758)
   Call: (273) [system] get_char((0x55aefe44e2f0), l)
   Exit: (273) [system] get_char((0x55aefe44e2f0), l)
   Call: (273) [system] l=(\)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _325758)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _340630)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _340630)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _342496)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (274) [user] is_delimiter(l)
^  Unify: (274) [user] is_delimiter(l)
   Call: (275) [system] char_type(l, space)
^  Redo: (274) [user] is_delimiter(l)
   Call: (275) [system] arg(_348136, v('(', ')', end_of_file), l)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _340630)
   Call: (274) [system] ')'==l
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _340630)
   Call: (274) [system] get_char((0x55aefe44e2f0), l)
   Exit: (274) [system] get_char((0x55aefe44e2f0), l)
   Call: (274) [system] l=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _340630)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _355502)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _355502)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _357368)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (275) [user] is_delimiter(a)
^  Unify: (275) [user] is_delimiter(a)
   Call: (276) [system] char_type(a, space)
^  Redo: (275) [user] is_delimiter(a)
   Call: (276) [system] arg(_363008, v('(', ')', end_of_file), a)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _355502)
   Call: (275) [system] ')'==a
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _355502)
   Call: (275) [system] get_char((0x55aefe44e2f0), a)
   Exit: (275) [system] get_char((0x55aefe44e2f0), a)
   Call: (275) [system] a=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _355502)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _370374)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _370374)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _372240)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (276) [user] is_delimiter(p)
^  Unify: (276) [user] is_delimiter(p)
   Call: (277) [system] char_type(p, space)
^  Redo: (276) [user] is_delimiter(p)
   Call: (277) [system] arg(_377880, v('(', ')', end_of_file), p)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _370374)
   Call: (276) [system] ')'==p
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _370374)
   Call: (276) [system] get_char((0x55aefe44e2f0), p)
   Exit: (276) [system] get_char((0x55aefe44e2f0), p)
   Call: (276) [system] p=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _370374)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _385246)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _385246)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _387112)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (277) [user] is_delimiter(s)
^  Unify: (277) [user] is_delimiter(s)
   Call: (278) [system] char_type(s, space)
^  Redo: (277) [user] is_delimiter(s)
   Call: (278) [system] arg(_392752, v('(', ')', end_of_file), s)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _385246)
   Call: (277) [system] ')'==s
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _385246)
   Call: (277) [system] get_char((0x55aefe44e2f0), s)
   Exit: (277) [system] get_char((0x55aefe44e2f0), s)
   Call: (277) [system] s=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _385246)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _400118)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _400118)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _401984)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (278) [user] is_delimiter(e)
^  Unify: (278) [user] is_delimiter(e)
   Call: (279) [system] char_type(e, space)
^  Redo: (278) [user] is_delimiter(e)
   Call: (279) [system] arg(_407624, v('(', ')', end_of_file), e)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _400118)
   Call: (278) [system] ')'==e
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _400118)
   Call: (278) [system] get_char((0x55aefe44e2f0), e)
   Exit: (278) [system] get_char((0x55aefe44e2f0), e)
   Call: (278) [system] e=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _400118)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _414990)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _414990)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _416856)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), -)
^  Call: (279) [user] is_delimiter(-)
^  Unify: (279) [user] is_delimiter(-)
   Call: (280) [system] char_type(-, space)
^  Redo: (279) [user] is_delimiter(-)
   Call: (280) [system] arg(_422496, v('(', ')', end_of_file), -)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _414990)
   Call: (279) [system] ')'==(-)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _414990)
   Call: (279) [system] get_char((0x55aefe44e2f0), -)
   Exit: (279) [system] get_char((0x55aefe44e2f0), -)
   Call: (279) [system] (-)=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _414990)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _429862)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _429862)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _431728)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), b)
^  Call: (280) [user] is_delimiter(b)
^  Unify: (280) [user] is_delimiter(b)
   Call: (281) [system] char_type(b, space)
^  Redo: (280) [user] is_delimiter(b)
   Call: (281) [system] arg(_437368, v('(', ')', end_of_file), b)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _429862)
   Call: (280) [system] ')'==b
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _429862)
   Call: (280) [system] get_char((0x55aefe44e2f0), b)
   Exit: (280) [system] get_char((0x55aefe44e2f0), b)
   Call: (280) [system] b=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _429862)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _444734)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _444734)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _446600)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (281) [user] is_delimiter(i)
^  Unify: (281) [user] is_delimiter(i)
   Call: (282) [system] char_type(i, space)
^  Redo: (281) [user] is_delimiter(i)
   Call: (282) [system] arg(_452240, v('(', ')', end_of_file), i)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _444734)
   Call: (281) [system] ')'==i
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _444734)
   Call: (281) [system] get_char((0x55aefe44e2f0), i)
   Exit: (281) [system] get_char((0x55aefe44e2f0), i)
   Call: (281) [system] i=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _444734)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _459606)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _459606)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _461472)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (282) [user] is_delimiter(n)
^  Unify: (282) [user] is_delimiter(n)
   Call: (283) [system] char_type(n, space)
^  Redo: (282) [user] is_delimiter(n)
   Call: (283) [system] arg(_467112, v('(', ')', end_of_file), n)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _459606)
   Call: (282) [system] ')'==n
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _459606)
   Call: (282) [system] get_char((0x55aefe44e2f0), n)
   Exit: (282) [system] get_char((0x55aefe44e2f0), n)
   Call: (282) [system] n=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _459606)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _474478)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _474478)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _476344)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), d)
^  Call: (283) [user] is_delimiter(d)
^  Unify: (283) [user] is_delimiter(d)
   Call: (284) [system] char_type(d, space)
^  Redo: (283) [user] is_delimiter(d)
   Call: (284) [system] arg(_481984, v('(', ')', end_of_file), d)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _474478)
   Call: (283) [system] ')'==d
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _474478)
   Call: (283) [system] get_char((0x55aefe44e2f0), d)
   Exit: (283) [system] get_char((0x55aefe44e2f0), d)
   Call: (283) [system] d=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _474478)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _489350)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _489350)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _491216)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (284) [user] is_delimiter(' ')
^  Unify: (284) [user] is_delimiter(' ')
   Call: (285) [system] char_type(' ', space)
   Exit: (285) [system] char_type(' ', space)
^  Exit: (284) [user] is_delimiter(' ')
   Call: (284) [system] _489350=[]
   Exit: (284) [system] []=[]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (283) [system] _474478=[d]
   Exit: (283) [system] [d]=[d]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [d])
   Call: (282) [system] _459606=[n, d]
   Exit: (282) [system] [n, d]=[n, d]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n, d])
   Call: (281) [system] _444734=[i, n, d]
   Exit: (281) [system] [i, n, d]=[i, n, d]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, n, d])
   Call: (280) [system] _429862=[b, i, n, d]
   Exit: (280) [system] [b, i, n, d]=[b, i, n, d]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [b, i, n, d])
   Call: (279) [system] _414990=[-, b, i, n, d]
   Exit: (279) [system] [-, b, i, n, d]=[-, b, i, n, d]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [-, b, i, n, d])
   Call: (278) [system] _400118=[e, -, b, i, n, d]
   Exit: (278) [system] [e, -, b, i, n, d]=[e, -, b, i, n, d]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, -, b, i, n, d])
   Call: (277) [system] _385246=[s, e, -, b, i, n, d]
   Exit: (277) [system] [s, e, -, b, i, n, d]=[s, e, -, b, i, n, d]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, e, -, b, i, n, d])
   Call: (276) [system] _370374=[p, s, e, -, b, i, n, d]
   Exit: (276) [system] [p, s, e, -, b, i, n, d]=[p, s, e, -, b, i, n, d]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, s, e, -, b, i, n, d])
   Call: (275) [system] _355502=[a, p, s, e, -, b, i, n, d]
   Exit: (275) [system] [a, p, s, e, -, b, i, n, d]=[a, p, s, e, -, b, i, n, d]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, p, s, e, -, b, i, n, d])
   Call: (274) [system] _5998=[l, a, p, s, e, -, b, i, n, d]
   Exit: (274) [system] [l, a, p, s, e, -, b, i, n, d]=[l, a, p, s, e, -, b, i, n, d]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l, a, p, s, e, -, b, i, n, d])
   Call: (273) [system] _5994=[l, l, a, p, s, e, -, b, i, n, d]
   Exit: (273) [system] [l, l, a, p, s, e, -, b, i, n, d]=[l, l, a, p, s, e, -, b, i, n, d]
^  Exit: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l, l, a, p, s, e, -, b, i, n, d])
   Call: (272) [system] _5990=[o, l, l, a, p, s, e, -, b, i, n, d]
   Exit: (272) [system] [o, l, l, a, p, s, e, -, b, i, n, d]=[o, l, l, a, p, s, e, -, b, i, n, d]
^  Exit: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, l, l, a, p, s, e, -, b, i, n, d])
^  Call: (271) [user] classify_and_convert_charseq(c, [o, l, l, a, p, s, e, -, b, i, n, d], _5986)
^  Unify: (271) [user] classify_and_convert_charseq(c, [o, l, l, a, p, s, e, -, b, i, n, d], _5986)
^  Call: (273) [system] setup_call_cleanup('$notrace'(_18016, _18018), once(user:catch(read_from_chars([c, o, l, l, a, p, s, e, -, b, i, n, d], _5986), _17992, fail)), '$restore_trace'(_18016, _18018))
^  Unify: (273) [system] setup_call_cleanup(system:'$notrace'(_18016, _18018), system:once(user:catch(read_from_chars([c, o, l, l, a, p, s, e, -, b, i, n, d], _5986), _17992, fail)), system:'$restore_trace'(_18016, _18018))
^  Call: (274) [system] sig_atomic(system:'$notrace'(_18016, _18018))
^  Exit: (273) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([c, o, l, l, a, p, s, e, -, b, i, n, d], collapse-bind), _17992, fail)), system:'$restore_trace'(3, -1))
   Call: (272) [system] atomic(collapse-bind)
^  Redo: (271) [user] classify_and_convert_charseq(c, [o, l, l, a, p, s, e, -, b, i, n, d], _5986)
^  Unify: (271) [user] classify_and_convert_charseq(c, [o, l, l, a, p, s, e, -, b, i, n, d], _5986)
   Call: (272) [system] atom_chars(_5986, [c, o, l, l, a, p, s, e, -, b, i, n, d])
   Exit: (272) [system] atom_chars('collapse-bind', [c, o, l, l, a, p, s, e, -, b, i, n, d])
^  Exit: (271) [user] classify_and_convert_charseq(c, [o, l, l, a, p, s, e, -, b, i, n, d], 'collapse-bind')
^  Exit: (270) [user] read_symbolic(')', (0x55aefe44e2f0), c, 'collapse-bind')
^  Exit: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), 'collapse-bind')
^  Call: (269) [user] read_list(')', (0x55aefe44e2f0), _29262)
^  Unify: (269) [user] read_list(')', (0x55aefe44e2f0), _29262)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _32976)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (271) [system] ' '=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(' ')
^  Unify: (271) [user] is_like_space(' ')
   Call: (272) [system] char_type(' ', 'white')
   Exit: (272) [system] char_type(' ', 'white')
^  Exit: (271) [user] is_like_space(' ')
   Call: (271) [system] get_char((0x55aefe44e2f0), _41634)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _45262)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _62970)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (270) [system] '('=')'
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _29262)
   Call: (270) [system] '('=end_of_file
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _29262)
^  Call: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _68548)
^  Unify: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _68548)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _72262)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] get_char((0x55aefe44e2f0), _89046)
   Exit: (271) [system] get_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('='('
   Exit: (271) [system] '('='('
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _68548)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _68548)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _96472)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, 'white')
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, end_of_line)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, space)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _113256)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), -)
   Call: (272) [system] (-)=')'
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _68548)
   Call: (272) [system] (-)=end_of_file
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _68548)
^  Call: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _118834)
^  Unify: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _118834)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _122548)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, 'white')
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, end_of_line)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, space)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] get_char((0x55aefe44e2f0), _139332)
   Exit: (273) [system] get_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)='('
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _118834)
   Call: (273) [system] (-)='['
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _118834)
   Call: (273) [system] (-)='{'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _118834)
   Call: (273) [system] (-)='"'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _118834)
   Call: (273) [system] (-)=!
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _118834)
   Call: (273) [system] (-)='\''
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _118834)
   Call: (273) [system] (-)='`'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _118834)
   Call: (273) [system] (-)=end_of_file
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _118834)
^  Call: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _118834)
^  Unify: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _118834)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _157942)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _157942)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _159808)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), >)
^  Call: (275) [user] is_delimiter(>)
^  Unify: (275) [user] is_delimiter(>)
   Call: (276) [system] char_type(>, space)
^  Redo: (275) [user] is_delimiter(>)
   Call: (276) [system] arg(_165448, v('(', ')', end_of_file), >)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _157942)
   Call: (275) [system] ')'==(>)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _157942)
   Call: (275) [system] get_char((0x55aefe44e2f0), >)
   Exit: (275) [system] get_char((0x55aefe44e2f0), >)
   Call: (275) [system] (>)=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _157942)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _172814)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _172814)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _174680)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] is_delimiter(' ')
^  Unify: (276) [user] is_delimiter(' ')
   Call: (277) [system] char_type(' ', space)
   Exit: (277) [system] char_type(' ', space)
^  Exit: (276) [user] is_delimiter(' ')
   Call: (276) [system] _172814=[]
   Exit: (276) [system] []=[]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (275) [system] _157942=[>]
   Exit: (275) [system] [>]=[>]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [>])
^  Call: (274) [user] classify_and_convert_charseq(-, [>], _118834)
^  Unify: (274) [user] classify_and_convert_charseq(-, [>], _118834)
^  Call: (276) [system] setup_call_cleanup('$notrace'(_188640, _188642), once(user:catch(read_from_chars([-, >], _118834), _188616, fail)), '$restore_trace'(_188640, _188642))
^  Unify: (276) [system] setup_call_cleanup(system:'$notrace'(_188640, _188642), system:once(user:catch(read_from_chars([-, >], _118834), _188616, fail)), system:'$restore_trace'(_188640, _188642))
^  Call: (277) [system] sig_atomic(system:'$notrace'(_188640, _188642))
^  Exit: (276) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([-, >], ->), _188616, fail)), system:'$restore_trace'(3, -1))
   Call: (275) [system] atomic(->)
   Exit: (275) [system] atomic(->)
^  Exit: (274) [user] classify_and_convert_charseq(-, [>], ->)
^  Exit: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, ->)
^  Exit: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), ->)
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _197078)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _197078)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _200792)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (274) [system] ' '=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(' ')
^  Unify: (274) [user] is_like_space(' ')
   Call: (275) [system] char_type(' ', 'white')
   Exit: (275) [system] char_type(' ', 'white')
^  Exit: (274) [user] is_like_space(' ')
   Call: (274) [system] get_char((0x55aefe44e2f0), _209450)
   Exit: (274) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _213078)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', 'white')
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', end_of_line)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', space)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _230786)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (273) [system] 'A'=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _197078)
   Call: (273) [system] 'A'=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _197078)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _236364)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _236364)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _240078)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', 'white')
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', end_of_line)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', space)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _256862)
   Exit: (274) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (274) [system] 'A'='('
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _236364)
   Call: (274) [system] 'A'='['
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _236364)
   Call: (274) [system] 'A'='{'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _236364)
   Call: (274) [system] 'A'='"'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _236364)
   Call: (274) [system] 'A'=!
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _236364)
   Call: (274) [system] 'A'='\''
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _236364)
   Call: (274) [system] 'A'='`'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _236364)
   Call: (274) [system] 'A'=end_of_file
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _236364)
^  Call: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _236364)
^  Unify: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _236364)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275472)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275472)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _277338)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (276) [user] is_delimiter(t)
^  Unify: (276) [user] is_delimiter(t)
   Call: (277) [system] char_type(t, space)
^  Redo: (276) [user] is_delimiter(t)
   Call: (277) [system] arg(_282978, v('(', ')', end_of_file), t)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275472)
   Call: (276) [system] ')'==t
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275472)
   Call: (276) [system] get_char((0x55aefe44e2f0), t)
   Exit: (276) [system] get_char((0x55aefe44e2f0), t)
   Call: (276) [system] t=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275472)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _290344)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _290344)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _292210)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (277) [user] is_delimiter(o)
^  Unify: (277) [user] is_delimiter(o)
   Call: (278) [system] char_type(o, space)
^  Redo: (277) [user] is_delimiter(o)
   Call: (278) [system] arg(_297850, v('(', ')', end_of_file), o)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _290344)
   Call: (277) [system] ')'==o
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _290344)
   Call: (277) [system] get_char((0x55aefe44e2f0), o)
   Exit: (277) [system] get_char((0x55aefe44e2f0), o)
   Call: (277) [system] o=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _290344)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _305216)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _305216)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _307082)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (278) [user] is_delimiter(m)
^  Unify: (278) [user] is_delimiter(m)
   Call: (279) [system] char_type(m, space)
^  Redo: (278) [user] is_delimiter(m)
   Call: (279) [system] arg(_312722, v('(', ')', end_of_file), m)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _305216)
   Call: (278) [system] ')'==m
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _305216)
   Call: (278) [system] get_char((0x55aefe44e2f0), m)
   Exit: (278) [system] get_char((0x55aefe44e2f0), m)
   Call: (278) [system] m=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _305216)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _320088)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _320088)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _321954)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (279) [user] is_delimiter(' ')
^  Unify: (279) [user] is_delimiter(' ')
   Call: (280) [system] char_type(' ', space)
   Exit: (280) [system] char_type(' ', space)
^  Exit: (279) [user] is_delimiter(' ')
   Call: (279) [system] _320088=[]
   Exit: (279) [system] []=[]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (278) [system] _305216=[m]
   Exit: (278) [system] [m]=[m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (277) [system] _290344=[o, m]
   Exit: (277) [system] [o, m]=[o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (276) [system] _275472=[t, o, m]
   Exit: (276) [system] [t, o, m]=[t, o, m]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (275) [user] classify_and_convert_charseq('A', [t, o, m], _236364)
^  Unify: (275) [user] classify_and_convert_charseq('A', [t, o, m], _236364)
^  Call: (277) [system] setup_call_cleanup('$notrace'(_341502, _341504), once(user:catch(read_from_chars(['A', t, o, m], _236364), _341478, fail)), '$restore_trace'(_341502, _341504))
^  Unify: (277) [system] setup_call_cleanup(system:'$notrace'(_341502, _341504), system:once(user:catch(read_from_chars(['A', t, o, m], _236364), _341478, fail)), system:'$restore_trace'(_341502, _341504))
^  Call: (278) [system] sig_atomic(system:'$notrace'(_341502, _341504))
^  Exit: (277) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _236364), _341478, fail)), system:'$restore_trace'(3, -1))
   Call: (276) [system] atomic(_236364)
^  Redo: (275) [user] classify_and_convert_charseq('A', [t, o, m], _236364)
^  Unify: (275) [user] classify_and_convert_charseq('A', [t, o, m], _236364)
   Call: (276) [system] atom_chars(_236364, ['A', t, o, m])
   Exit: (276) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (275) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (273) [user] read_list(')', (0x55aefe44e2f0), _352756)
^  Unify: (273) [user] read_list(')', (0x55aefe44e2f0), _352756)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _356470)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (275) [system] ' '=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(' ')
^  Unify: (275) [user] is_like_space(' ')
   Call: (276) [system] char_type(' ', 'white')
   Exit: (276) [system] char_type(' ', 'white')
^  Exit: (275) [user] is_like_space(' ')
   Call: (275) [system] get_char((0x55aefe44e2f0), _365128)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _368756)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _386464)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (274) [system] 'A'=')'
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _352756)
   Call: (274) [system] 'A'=end_of_file
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _352756)
^  Call: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _392042)
^  Unify: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _392042)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _395756)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] get_char((0x55aefe44e2f0), _412540)
   Exit: (275) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'='('
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _392042)
   Call: (275) [system] 'A'='['
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _392042)
   Call: (275) [system] 'A'='{'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _392042)
   Call: (275) [system] 'A'='"'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _392042)
   Call: (275) [system] 'A'=!
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _392042)
   Call: (275) [system] 'A'='\''
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _392042)
   Call: (275) [system] 'A'='`'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _392042)
   Call: (275) [system] 'A'=end_of_file
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _392042)
^  Call: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _392042)
^  Unify: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _392042)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _431150)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _431150)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _433016)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (277) [user] is_delimiter(t)
^  Unify: (277) [user] is_delimiter(t)
   Call: (278) [system] char_type(t, space)
^  Redo: (277) [user] is_delimiter(t)
   Call: (278) [system] arg(_438656, v('(', ')', end_of_file), t)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _431150)
   Call: (277) [system] ')'==t
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _431150)
   Call: (277) [system] get_char((0x55aefe44e2f0), t)
   Exit: (277) [system] get_char((0x55aefe44e2f0), t)
   Call: (277) [system] t=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _431150)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _446022)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _446022)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _447888)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (278) [user] is_delimiter(o)
^  Unify: (278) [user] is_delimiter(o)
   Call: (279) [system] char_type(o, space)
^  Redo: (278) [user] is_delimiter(o)
   Call: (279) [system] arg(_453528, v('(', ')', end_of_file), o)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _446022)
   Call: (278) [system] ')'==o
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _446022)
   Call: (278) [system] get_char((0x55aefe44e2f0), o)
   Exit: (278) [system] get_char((0x55aefe44e2f0), o)
   Call: (278) [system] o=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _446022)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _460894)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _460894)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _462760)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (279) [user] is_delimiter(m)
^  Unify: (279) [user] is_delimiter(m)
   Call: (280) [system] char_type(m, space)
^  Redo: (279) [user] is_delimiter(m)
   Call: (280) [system] arg(_468400, v('(', ')', end_of_file), m)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _460894)
   Call: (279) [system] ')'==m
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _460894)
   Call: (279) [system] get_char((0x55aefe44e2f0), m)
   Exit: (279) [system] get_char((0x55aefe44e2f0), m)
   Call: (279) [system] m=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _460894)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _475766)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _475766)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _477632)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (280) [user] is_delimiter(')')
^  Unify: (280) [user] is_delimiter(')')
   Call: (281) [system] char_type(')', space)
^  Redo: (280) [user] is_delimiter(')')
   Call: (281) [system] arg(_483272, v('(', ')', end_of_file), ')')
   Exit: (281) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (280) [user] is_delimiter(')')
   Call: (280) [system] _475766=[]
   Exit: (280) [system] []=[]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (279) [system] _460894=[m]
   Exit: (279) [system] [m]=[m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (278) [system] _446022=[o, m]
   Exit: (278) [system] [o, m]=[o, m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (277) [system] _431150=[t, o, m]
   Exit: (277) [system] [t, o, m]=[t, o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (276) [user] classify_and_convert_charseq('A', [t, o, m], _392042)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _392042)
^  Call: (278) [system] setup_call_cleanup('$notrace'(_499048, _499050), once(user:catch(read_from_chars(['A', t, o, m], _392042), _499024, fail)), '$restore_trace'(_499048, _499050))
^  Unify: (278) [system] setup_call_cleanup(system:'$notrace'(_499048, _499050), system:once(user:catch(read_from_chars(['A', t, o, m], _392042), _499024, fail)), system:'$restore_trace'(_499048, _499050))
^  Call: (279) [system] sig_atomic(system:'$notrace'(_499048, _499050))
^  Exit: (278) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _392042), _499024, fail)), system:'$restore_trace'(3, -1))
   Call: (277) [system] atomic(_392042)
^  Redo: (276) [user] classify_and_convert_charseq('A', [t, o, m], _392042)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _392042)
   Call: (277) [system] atom_chars(_392042, ['A', t, o, m])
   Exit: (277) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (276) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _510302)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _510302)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _514016)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (276) [system] ')'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', 'white')
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', end_of_line)
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', space)
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _12882)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (275) [system] ')'=')'
   Exit: (275) [system] ')'=')'
   Call: (275) [system] get_char((0x55aefe44e2f0), _16672)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ')')
   Call: (275) [system] _6012=[]
   Exit: (275) [system] []=[]
^  Exit: (274) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (274) [system] _6006=['Atom']
   Exit: (274) [system] ['Atom']=['Atom']
^  Exit: (273) [user] read_list(')', (0x55aefe44e2f0), ['Atom'])
   Call: (273) [system] _6000=['Atom', 'Atom']
   Exit: (273) [system] ['Atom', 'Atom']=['Atom', 'Atom']
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Atom'])
   Call: (272) [system] _5992=[->, 'Atom', 'Atom']
   Exit: (272) [system] [->, 'Atom', 'Atom']=[->, 'Atom', 'Atom']
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [->, 'Atom', 'Atom'])
^  Exit: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), [->, 'Atom', 'Atom'])
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _30554)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _30554)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _34268)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (272) [system] ')'=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', 'white')
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', end_of_line)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', space)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _51052)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (271) [system] ')'=')'
   Exit: (271) [system] ')'=')'
   Call: (271) [system] get_char((0x55aefe44e2f0), _54842)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ')')
   Call: (271) [system] _30554=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (270) [system] _5988=[[->, 'Atom', 'Atom']]
   Exit: (270) [system] [[->, 'Atom', 'Atom']]=[[->, 'Atom', 'Atom']]
^  Exit: (269) [user] read_list(')', (0x55aefe44e2f0), [[->, 'Atom', 'Atom']])
   Call: (269) [system] _5982=['collapse-bind', [->, 'Atom', 'Atom']]
   Exit: (269) [system] ['collapse-bind', [->, 'Atom', 'Atom']]=['collapse-bind', [->, 'Atom', 'Atom']]
^  Exit: (268) [user] read_list(')', (0x55aefe44e2f0), ['collapse-bind', [->, 'Atom', 'Atom']])
   Call: (268) [system] _5942=[:, 'collapse-bind', [->, 'Atom', 'Atom']]
   Exit: (268) [system] [:, 'collapse-bind', [->, 'Atom', 'Atom']]=[:, 'collapse-bind', [->, 'Atom', 'Atom']]
^  Exit: (267) [user] read_list(')', (0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Exit: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Exit: (265) [user] read_sexpr((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Call: (265) [user] assertz(metta_file_comment(12, 0, 293, [:, 'collapse-bind', [->, 'Atom', 'Atom']], '$stream_position'(293, 12, 0, 293)))
^  Exit: (265) [user] assertz(metta_file_comment(12, 0, 293, [:, 'collapse-bind', [->, 'Atom', 'Atom']], '$stream_position'(293, 12, 0, 293)))
^  Exit: (263) [system] once(user:(read_position((0x55aefe44e2f0), 12, 0, 293, '$stream_position'(293, 12, 0, 293)), read_sexpr((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Atom']]), assertz(metta_file_comment(12, 0, 293, [:, 'collapse-bind', [->, 'Atom', 'Atom']], '$stream_position'(293, 12, 0, 293)))))
   Call: (263) [system] fail
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Call: (263) [user] retract(metta_file_comment(_75216, _75218, _75220, _75222, _75224))
^  Exit: (263) [user] retract(metta_file_comment(12, 0, 293, [:, 'collapse-bind', [->, 'Atom', 'Atom']], '$stream_position'(293, 12, 0, 293)))
^  Call: (263) [user] trly(untyped_to_metta, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _5908)
^  Call: (264) [user] once(call(untyped_to_metta, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _79002))
^  Unify: (264) [system] once(user:call(untyped_to_metta, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _79002))
^  Call: (265) [user] call(untyped_to_metta, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _79002)
^  Unify: (265) [system] call(user:untyped_to_metta, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _79002)
^  Call: (266) [user] untyped_to_metta([:, 'collapse-bind', [->, 'Atom', 'Atom']], _79002)
^  Unify: (266) [user] untyped_to_metta([:, 'collapse-bind', [->, 'Atom', 'Atom']], _79002)
^  Call: (267) [user] must_det_ll(trly(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _84614))
^  Unify: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _84614))
^  Call: (268) [user] once(user:trly(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _84614))
^  Unify: (268) [system] once(user:trly(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _84614))
^  Call: (269) [user] trly(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _84614)
^  Unify: (269) [user] trly(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _84614)
^  Call: (270) [user] once(call(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200))
^  Unify: (270) [system] once(user:call(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200))
^  Call: (271) [user] call(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200)
^  Unify: (271) [system] call(user:mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200)
^  Call: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200)
^  Unify: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200)
   Call: (273) [system] var([:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Redo: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200)
^  Unify: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Atom']], '$VAR'(_97660))
   Call: (273) [system] atom([:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Redo: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200)
^  Unify: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200)
   Call: (273) [system] [:, 'collapse-bind', [->, 'Atom', 'Atom']]==true
^  Redo: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200)
^  Unify: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200)
   Call: (273) [system] [:, 'collapse-bind', [->, 'Atom', 'Atom']]==false
^  Redo: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200)
^  Unify: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200)
   Call: (273) [system] (:)=='['
^  Redo: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200)
^  Unify: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200)
   Call: (273) [system] (:)=='{'
^  Redo: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200)
^  Unify: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200)
   Call: (273) [system] is_list(['collapse-bind', [->, 'Atom', 'Atom']])
   Exit: (273) [system] is_list(['collapse-bind', [->, 'Atom', 'Atom']])
   Call: (273) [lists] lists:last(['collapse-bind', [->, 'Atom', 'Atom']], _114354)
   Unify: (273) [lists] lists:last(['collapse-bind', [->, 'Atom', 'Atom']], _114354)
   Call: (274) [lists] lists:last_([[->, 'Atom', 'Atom']], 'collapse-bind', _114354)
   Unify: (274) [lists] lists:last_([[->, 'Atom', 'Atom']], 'collapse-bind', _114354)
   Call: (275) [lists] lists:last_([], [->, 'Atom', 'Atom'], _114354)
   Unify: (275) [lists] lists:last_([], [->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
   Exit: (275) [lists] lists:last_([], [->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
   Exit: (274) [lists] lists:last_([[->, 'Atom', 'Atom']], 'collapse-bind', [->, 'Atom', 'Atom'])
   Exit: (273) [lists] lists:last(['collapse-bind', [->, 'Atom', 'Atom']], [->, 'Atom', 'Atom'])
   Call: (273) [system] [->, 'Atom', 'Atom']=='}'
^  Redo: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200)
^  Unify: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200)
   Call: (273) [system] [:, 'collapse-bind', [->, 'Atom', 'Atom']]==[_125518, _125524]
^  Redo: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200)
^  Unify: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200)
   Call: (273) [system] fail
^  Redo: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200)
^  Unify: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200)
   Call: (273) [system] is_list([:, 'collapse-bind', [->, 'Atom', 'Atom']])
   Exit: (273) [system] is_list([:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Call: (273) [user] apply:maplist(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200)
^  Unify: (273) [apply] apply:maplist(user:mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200)
   Call: (274) [apply] apply:maplist_([:, 'collapse-bind', [->, 'Atom', 'Atom']], _90200, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([:, 'collapse-bind', [->, 'Atom', 'Atom']], [_135748|_135750], user:mfix_vars1)
^  Call: (275) [user] mfix_vars1(:, _135748)
^  Unify: (275) [user] mfix_vars1(:, _135748)
   Call: (276) [system] var(:)
^  Redo: (275) [user] mfix_vars1(:, _135748)
^  Unify: (275) [user] mfix_vars1(:, '$VAR'(_140394))
   Call: (276) [system] atom(:)
   Exit: (276) [system] atom(:)
^  Call: (276) [user] symbol_concat($, _143172, :)
^  Unify: (276) [user] symbol_concat($, _143172, :)
   Call: (277) [system] atom_concat($, _143172, :)
   Fail: (277) [system] atom_concat($, _143172, :)
^  Fail: (276) [user] symbol_concat($, _143172, :)
^  Redo: (275) [user] mfix_vars1(:, _135748)
^  Unify: (275) [user] mfix_vars1(:, _135748)
   Call: (276) [system] (:)==true
^  Redo: (275) [user] mfix_vars1(:, _135748)
^  Unify: (275) [user] mfix_vars1(:, _135748)
   Call: (276) [system] (:)==false
^  Redo: (275) [user] mfix_vars1(:, _135748)
^  Unify: (275) [user] mfix_vars1(:, _135748)
   Call: (276) [system] (:)==[_155260, _155266]
^  Redo: (275) [user] mfix_vars1(:, _135748)
^  Unify: (275) [user] mfix_vars1(:, _135748)
   Call: (276) [system] is_list(:)
^  Redo: (275) [user] mfix_vars1(:, _135748)
^  Unify: (275) [user] mfix_vars1(:, _135748)
   Call: (276) [system] string(:)
^  Redo: (275) [user] mfix_vars1(:, _135748)
^  Unify: (275) [user] mfix_vars1(:, _135748)
   Call: (276) [system] compound(:)
^  Redo: (275) [user] mfix_vars1(:, _135748)
^  Unify: (275) [user] mfix_vars1(:, _135748)
^  Call: (276) [user] symbol(:)
^  Unify: (276) [user] symbol(:)
   Call: (277) [system] atom(:)
   Exit: (277) [system] atom(:)
^  Exit: (276) [user] symbol(:)
^  Unify: (275) [user] mfix_vars1(:, :)
^  Exit: (275) [user] mfix_vars1(:, :)
   Call: (275) [apply] apply:maplist_(['collapse-bind', [->, 'Atom', 'Atom']], _135750, user:mfix_vars1)
   Unify: (275) [apply] apply:maplist_(['collapse-bind', [->, 'Atom', 'Atom']], [_173804|_173806], user:mfix_vars1)
^  Call: (276) [user] mfix_vars1('collapse-bind', _173804)
^  Unify: (276) [user] mfix_vars1('collapse-bind', _173804)
   Call: (277) [system] var('collapse-bind')
^  Redo: (276) [user] mfix_vars1('collapse-bind', _173804)
^  Unify: (276) [user] mfix_vars1('collapse-bind', '$VAR'(_178450))
   Call: (277) [system] atom('collapse-bind')
   Exit: (277) [system] atom('collapse-bind')
^  Call: (277) [user] symbol_concat($, _181228, 'collapse-bind')
^  Unify: (277) [user] symbol_concat($, _181228, 'collapse-bind')
   Call: (278) [system] atom_concat($, _181228, 'collapse-bind')
   Fail: (278) [system] atom_concat($, _181228, 'collapse-bind')
^  Fail: (277) [user] symbol_concat($, _181228, 'collapse-bind')
^  Redo: (276) [user] mfix_vars1('collapse-bind', _173804)
^  Unify: (276) [user] mfix_vars1('collapse-bind', _173804)
   Call: (277) [system] 'collapse-bind'==true
^  Redo: (276) [user] mfix_vars1('collapse-bind', _173804)
^  Unify: (276) [user] mfix_vars1('collapse-bind', _173804)
   Call: (277) [system] 'collapse-bind'==false
^  Redo: (276) [user] mfix_vars1('collapse-bind', _173804)
^  Unify: (276) [user] mfix_vars1('collapse-bind', _173804)
   Call: (277) [system] 'collapse-bind'==[_193316, _193322]
^  Redo: (276) [user] mfix_vars1('collapse-bind', _173804)
^  Unify: (276) [user] mfix_vars1('collapse-bind', _173804)
   Call: (277) [system] is_list('collapse-bind')
^  Redo: (276) [user] mfix_vars1('collapse-bind', _173804)
^  Unify: (276) [user] mfix_vars1('collapse-bind', _173804)
   Call: (277) [system] string('collapse-bind')
^  Redo: (276) [user] mfix_vars1('collapse-bind', _173804)
^  Unify: (276) [user] mfix_vars1('collapse-bind', _173804)
   Call: (277) [system] compound('collapse-bind')
^  Redo: (276) [user] mfix_vars1('collapse-bind', _173804)
^  Unify: (276) [user] mfix_vars1('collapse-bind', _173804)
^  Call: (277) [user] symbol('collapse-bind')
^  Unify: (277) [user] symbol('collapse-bind')
   Call: (278) [system] atom('collapse-bind')
   Exit: (278) [system] atom('collapse-bind')
^  Exit: (277) [user] symbol('collapse-bind')
^  Unify: (276) [user] mfix_vars1('collapse-bind', 'collapse-bind')
^  Exit: (276) [user] mfix_vars1('collapse-bind', 'collapse-bind')
   Call: (276) [apply] apply:maplist_([[->, 'Atom', 'Atom']], _173806, user:mfix_vars1)
   Unify: (276) [apply] apply:maplist_([[->, 'Atom', 'Atom']], [_211860|_211862], user:mfix_vars1)
^  Call: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _211860)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _211860)
   Call: (278) [system] var([->, 'Atom', 'Atom'])
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _211860)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], '$VAR'(_216506))
   Call: (278) [system] atom([->, 'Atom', 'Atom'])
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _211860)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _211860)
   Call: (278) [system] [->, 'Atom', 'Atom']==true
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _211860)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _211860)
   Call: (278) [system] [->, 'Atom', 'Atom']==false
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _211860)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _211860)
   Call: (278) [system] (->)=='['
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _211860)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _211860)
   Call: (278) [system] (->)=='{'
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _211860)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _211860)
   Call: (278) [system] is_list(['Atom', 'Atom'])
   Exit: (278) [system] is_list(['Atom', 'Atom'])
   Call: (278) [lists] lists:last(['Atom', 'Atom'], _233200)
   Unify: (278) [lists] lists:last(['Atom', 'Atom'], _233200)
   Call: (279) [lists] lists:last_(['Atom'], 'Atom', _233200)
   Unify: (279) [lists] lists:last_(['Atom'], 'Atom', _233200)
   Call: (280) [lists] lists:last_([], 'Atom', _233200)
   Unify: (280) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (280) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (279) [lists] lists:last_(['Atom'], 'Atom', 'Atom')
   Exit: (278) [lists] lists:last(['Atom', 'Atom'], 'Atom')
   Call: (278) [system] 'Atom'=='}'
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _211860)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _211860)
   Call: (278) [system] [->, 'Atom', 'Atom']==[_244364, _244370]
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _211860)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _211860)
   Call: (278) [system] fail
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _211860)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _211860)
   Call: (278) [system] is_list([->, 'Atom', 'Atom'])
   Exit: (278) [system] is_list([->, 'Atom', 'Atom'])
^  Call: (278) [user] apply:maplist(mfix_vars1, [->, 'Atom', 'Atom'], _211860)
^  Unify: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Atom'], _211860)
   Call: (279) [apply] apply:maplist_([->, 'Atom', 'Atom'], _211860, user:mfix_vars1)
   Unify: (279) [apply] apply:maplist_([->, 'Atom', 'Atom'], [_254594|_254596], user:mfix_vars1)
^  Call: (280) [user] mfix_vars1(->, _254594)
^  Unify: (280) [user] mfix_vars1(->, _254594)
   Call: (281) [system] var(->)
^  Redo: (280) [user] mfix_vars1(->, _254594)
^  Unify: (280) [user] mfix_vars1(->, '$VAR'(_259240))
   Call: (281) [system] atom(->)
   Exit: (281) [system] atom(->)
^  Call: (281) [user] symbol_concat($, _262018, ->)
^  Unify: (281) [user] symbol_concat($, _262018, ->)
   Call: (282) [system] atom_concat($, _262018, ->)
   Fail: (282) [system] atom_concat($, _262018, ->)
^  Fail: (281) [user] symbol_concat($, _262018, ->)
^  Redo: (280) [user] mfix_vars1(->, _254594)
^  Unify: (280) [user] mfix_vars1(->, _254594)
   Call: (281) [system] (->)==true
^  Redo: (280) [user] mfix_vars1(->, _254594)
^  Unify: (280) [user] mfix_vars1(->, _254594)
   Call: (281) [system] (->)==false
^  Redo: (280) [user] mfix_vars1(->, _254594)
^  Unify: (280) [user] mfix_vars1(->, _254594)
   Call: (281) [system] (->)==[_274106, _274112]
^  Redo: (280) [user] mfix_vars1(->, _254594)
^  Unify: (280) [user] mfix_vars1(->, _254594)
   Call: (281) [system] is_list(->)
^  Redo: (280) [user] mfix_vars1(->, _254594)
^  Unify: (280) [user] mfix_vars1(->, _254594)
   Call: (281) [system] string(->)
^  Redo: (280) [user] mfix_vars1(->, _254594)
^  Unify: (280) [user] mfix_vars1(->, _254594)
   Call: (281) [system] compound(->)
^  Redo: (280) [user] mfix_vars1(->, _254594)
^  Unify: (280) [user] mfix_vars1(->, _254594)
^  Call: (281) [user] symbol(->)
^  Unify: (281) [user] symbol(->)
   Call: (282) [system] atom(->)
   Exit: (282) [system] atom(->)
^  Exit: (281) [user] symbol(->)
^  Unify: (280) [user] mfix_vars1(->, ->)
^  Exit: (280) [user] mfix_vars1(->, ->)
   Call: (280) [apply] apply:maplist_(['Atom', 'Atom'], _254596, user:mfix_vars1)
   Unify: (280) [apply] apply:maplist_(['Atom', 'Atom'], [_292650|_292652], user:mfix_vars1)
^  Call: (281) [user] mfix_vars1('Atom', _292650)
^  Unify: (281) [user] mfix_vars1('Atom', _292650)
   Call: (282) [system] var('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _292650)
^  Unify: (281) [user] mfix_vars1('Atom', '$VAR'(_297296))
   Call: (282) [system] atom('Atom')
   Exit: (282) [system] atom('Atom')
^  Call: (282) [user] symbol_concat($, _300074, 'Atom')
^  Unify: (282) [user] symbol_concat($, _300074, 'Atom')
   Call: (283) [system] atom_concat($, _300074, 'Atom')
   Fail: (283) [system] atom_concat($, _300074, 'Atom')
^  Fail: (282) [user] symbol_concat($, _300074, 'Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _292650)
^  Unify: (281) [user] mfix_vars1('Atom', _292650)
   Call: (282) [system] 'Atom'==true
^  Redo: (281) [user] mfix_vars1('Atom', _292650)
^  Unify: (281) [user] mfix_vars1('Atom', _292650)
   Call: (282) [system] 'Atom'==false
^  Redo: (281) [user] mfix_vars1('Atom', _292650)
^  Unify: (281) [user] mfix_vars1('Atom', _292650)
   Call: (282) [system] 'Atom'==[_312162, _312168]
^  Redo: (281) [user] mfix_vars1('Atom', _292650)
^  Unify: (281) [user] mfix_vars1('Atom', _292650)
   Call: (282) [system] is_list('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _292650)
^  Unify: (281) [user] mfix_vars1('Atom', _292650)
   Call: (282) [system] string('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _292650)
^  Unify: (281) [user] mfix_vars1('Atom', _292650)
   Call: (282) [system] compound('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _292650)
^  Unify: (281) [user] mfix_vars1('Atom', _292650)
^  Call: (282) [user] symbol('Atom')
^  Unify: (282) [user] symbol('Atom')
   Call: (283) [system] atom('Atom')
   Exit: (283) [system] atom('Atom')
^  Exit: (282) [user] symbol('Atom')
^  Unify: (281) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (281) [user] mfix_vars1('Atom', 'Atom')
   Call: (281) [apply] apply:maplist_(['Atom'], _292652, user:mfix_vars1)
   Unify: (281) [apply] apply:maplist_(['Atom'], [_330706|_330708], user:mfix_vars1)
^  Call: (282) [user] mfix_vars1('Atom', _330706)
^  Unify: (282) [user] mfix_vars1('Atom', _330706)
   Call: (283) [system] var('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _330706)
^  Unify: (282) [user] mfix_vars1('Atom', '$VAR'(_335352))
   Call: (283) [system] atom('Atom')
   Exit: (283) [system] atom('Atom')
^  Call: (283) [user] symbol_concat($, _338130, 'Atom')
^  Unify: (283) [user] symbol_concat($, _338130, 'Atom')
   Call: (284) [system] atom_concat($, _338130, 'Atom')
   Fail: (284) [system] atom_concat($, _338130, 'Atom')
^  Fail: (283) [user] symbol_concat($, _338130, 'Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _330706)
^  Unify: (282) [user] mfix_vars1('Atom', _330706)
   Call: (283) [system] 'Atom'==true
^  Redo: (282) [user] mfix_vars1('Atom', _330706)
^  Unify: (282) [user] mfix_vars1('Atom', _330706)
   Call: (283) [system] 'Atom'==false
^  Redo: (282) [user] mfix_vars1('Atom', _330706)
^  Unify: (282) [user] mfix_vars1('Atom', _330706)
   Call: (283) [system] 'Atom'==[_350218, _350224]
^  Redo: (282) [user] mfix_vars1('Atom', _330706)
^  Unify: (282) [user] mfix_vars1('Atom', _330706)
   Call: (283) [system] is_list('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _330706)
^  Unify: (282) [user] mfix_vars1('Atom', _330706)
   Call: (283) [system] string('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _330706)
^  Unify: (282) [user] mfix_vars1('Atom', _330706)
   Call: (283) [system] compound('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _330706)
^  Unify: (282) [user] mfix_vars1('Atom', _330706)
^  Call: (283) [user] symbol('Atom')
^  Unify: (283) [user] symbol('Atom')
   Call: (284) [system] atom('Atom')
   Exit: (284) [system] atom('Atom')
^  Exit: (283) [user] symbol('Atom')
^  Unify: (282) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (282) [user] mfix_vars1('Atom', 'Atom')
   Call: (282) [apply] apply:maplist_([], _330708, user:mfix_vars1)
   Unify: (282) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (282) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (281) [apply] apply:maplist_(['Atom'], ['Atom'], user:mfix_vars1)
   Exit: (280) [apply] apply:maplist_(['Atom', 'Atom'], ['Atom', 'Atom'], user:mfix_vars1)
   Exit: (279) [apply] apply:maplist_([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'], user:mfix_vars1)
^  Exit: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
^  Exit: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
   Call: (277) [apply] apply:maplist_([], _211862, user:mfix_vars1)
   Unify: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (276) [apply] apply:maplist_([[->, 'Atom', 'Atom']], [[->, 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (275) [apply] apply:maplist_(['collapse-bind', [->, 'Atom', 'Atom']], ['collapse-bind', [->, 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']], user:mfix_vars1)
^  Exit: (273) [apply] apply:maplist(user:mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Exit: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Exit: (271) [system] call(user:mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Exit: (270) [system] once(user:call(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']]))
   Call: (270) [system] [:, 'collapse-bind', [->, 'Atom', 'Atom']]\=@=[:, 'collapse-bind', [->, 'Atom', 'Atom']]
^  Redo: (269) [user] trly(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _84614)
^  Unify: (269) [user] trly(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Exit: (269) [user] trly(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Exit: (268) [system] once(user:trly(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _390196))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _390196))
^  Call: (268) [user] once(user:trly(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _390196))
^  Unify: (268) [system] once(user:trly(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _390196))
^  Call: (269) [user] trly(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _390196)
^  Unify: (269) [user] trly(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _390196)
^  Call: (270) [user] once(call(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _395782))
^  Unify: (270) [system] once(user:call(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _395782))
^  Call: (271) [user] call(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _395782)
^  Unify: (271) [system] call(user:cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _395782)
^  Call: (272) [user] cons_to_c([:, 'collapse-bind', [->, 'Atom', 'Atom']], _395782)
^  Unify: (272) [user] cons_to_c([:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_c([:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Exit: (271) [system] call(user:cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Exit: (270) [system] once(user:call(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']]))
   Call: (270) [system] [:, 'collapse-bind', [->, 'Atom', 'Atom']]\=@=[:, 'collapse-bind', [->, 'Atom', 'Atom']]
^  Redo: (269) [user] trly(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _390196)
^  Unify: (269) [user] trly(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Exit: (269) [user] trly(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Exit: (268) [system] once(user:trly(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _79002))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _79002))
^  Call: (268) [user] once(user:trly(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _79002))
^  Unify: (268) [system] once(user:trly(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _79002))
^  Call: (269) [user] trly(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _79002)
^  Unify: (269) [user] trly(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _79002)
^  Call: (270) [user] once(call(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _418102))
^  Unify: (270) [system] once(user:call(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _418102))
^  Call: (271) [user] call(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _418102)
^  Unify: (271) [system] call(user:cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _418102)
^  Call: (272) [user] cons_to_l([:, 'collapse-bind', [->, 'Atom', 'Atom']], _418102)
^  Unify: (272) [user] cons_to_l([:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_l([:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Exit: (271) [system] call(user:cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Exit: (270) [system] once(user:call(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']]))
   Call: (270) [system] [:, 'collapse-bind', [->, 'Atom', 'Atom']]\=@=[:, 'collapse-bind', [->, 'Atom', 'Atom']]
^  Redo: (269) [user] trly(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _79002)
^  Unify: (269) [user] trly(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Exit: (269) [user] trly(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Exit: (268) [system] once(user:trly(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']]))
^  Exit: (266) [user] untyped_to_metta([:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Exit: (265) [system] call(user:untyped_to_metta, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Exit: (264) [system] once(user:call(untyped_to_metta, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']]))
   Call: (264) [system] [:, 'collapse-bind', [->, 'Atom', 'Atom']]\=@=[:, 'collapse-bind', [->, 'Atom', 'Atom']]
^  Redo: (263) [user] trly(untyped_to_metta, [:, 'collapse-bind', [->, 'Atom', 'Atom']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Exit: (263) [user] trly(untyped_to_metta, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Exit: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Atom']])
   Call: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Atom']])))
   Unify: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Atom']])))
   Exit: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Atom']])))
^  Exit: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Exit: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Atom']])
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Atom']])))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Atom']])))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Atom']])))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Call: (257) [user] subst_vars([:, 'collapse-bind', [->, 'Atom', 'Atom']], _452410, [], _452412)
^  Unify: (257) [user] subst_vars([:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']], [], [])
   Call: (258) [system] var([:, 'collapse-bind', [->, 'Atom', 'Atom']])
^  Redo: (257) [user] subst_vars([:, 'collapse-bind', [->, 'Atom', 'Atom']], _452410, [], _452412)
^  Unify: (257) [user] subst_vars([:, 'collapse-bind', [->, 'Atom', 'Atom']], [_456148|_456150], [], _452412)
^  Call: (258) [user] subst_vars(:, _456148, [], _457088)
^  Unify: (258) [user] subst_vars(:, :, [], [])
   Call: (259) [system] var(:)
^  Redo: (258) [user] subst_vars(:, _456148, [], _457088)
^  Unify: (258) [user] subst_vars(:, _456148, [], _457088)
   Call: (259) [system] atom(:)
   Exit: (259) [system] atom(:)
^  Call: (259) [user] symbol_concat($, _463606, :)
^  Unify: (259) [user] symbol_concat($, _463606, :)
   Call: (260) [system] atom_concat($, _463606, :)
   Fail: (260) [system] atom_concat($, _463606, :)
^  Fail: (259) [user] symbol_concat($, _463606, :)
^  Redo: (258) [user] subst_vars(:, _456148, [], _457088)
^  Unify: (258) [user] subst_vars(:, _456148, [], _457088)
   Call: (259) [system] compound(:)
^  Redo: (258) [user] subst_vars(:, _456148, [], _457088)
^  Unify: (258) [user] subst_vars(:, :, [], [])
^  Exit: (258) [user] subst_vars(:, :, [], [])
^  Call: (258) [user] subst_vars(['collapse-bind', [->, 'Atom', 'Atom']], _456150, [], _452412)
^  Unify: (258) [user] subst_vars(['collapse-bind', [->, 'Atom', 'Atom']], ['collapse-bind', [->, 'Atom', 'Atom']], [], [])
   Call: (259) [system] var(['collapse-bind', [->, 'Atom', 'Atom']])
^  Redo: (258) [user] subst_vars(['collapse-bind', [->, 'Atom', 'Atom']], _456150, [], _452412)
^  Unify: (258) [user] subst_vars(['collapse-bind', [->, 'Atom', 'Atom']], [_477606|_477608], [], _452412)
^  Call: (259) [user] subst_vars('collapse-bind', _477606, [], _478546)
^  Unify: (259) [user] subst_vars('collapse-bind', 'collapse-bind', [], [])
   Call: (260) [system] var('collapse-bind')
^  Redo: (259) [user] subst_vars('collapse-bind', _477606, [], _478546)
^  Unify: (259) [user] subst_vars('collapse-bind', _477606, [], _478546)
   Call: (260) [system] atom('collapse-bind')
   Exit: (260) [system] atom('collapse-bind')
^  Call: (260) [user] symbol_concat($, _485064, 'collapse-bind')
^  Unify: (260) [user] symbol_concat($, _485064, 'collapse-bind')
   Call: (261) [system] atom_concat($, _485064, 'collapse-bind')
   Fail: (261) [system] atom_concat($, _485064, 'collapse-bind')
^  Fail: (260) [user] symbol_concat($, _485064, 'collapse-bind')
^  Redo: (259) [user] subst_vars('collapse-bind', _477606, [], _478546)
^  Unify: (259) [user] subst_vars('collapse-bind', _477606, [], _478546)
   Call: (260) [system] compound('collapse-bind')
^  Redo: (259) [user] subst_vars('collapse-bind', _477606, [], _478546)
^  Unify: (259) [user] subst_vars('collapse-bind', 'collapse-bind', [], [])
^  Exit: (259) [user] subst_vars('collapse-bind', 'collapse-bind', [], [])
^  Call: (259) [user] subst_vars([[->, 'Atom', 'Atom']], _477608, [], _452412)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Atom']], [[->, 'Atom', 'Atom']], [], [])
   Call: (260) [system] var([[->, 'Atom', 'Atom']])
^  Redo: (259) [user] subst_vars([[->, 'Atom', 'Atom']], _477608, [], _452412)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Atom']], [_499064|_499066], [], _452412)
^  Call: (260) [user] subst_vars([->, 'Atom', 'Atom'], _499064, [], _500004)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'], [], [])
   Call: (261) [system] var([->, 'Atom', 'Atom'])
^  Redo: (260) [user] subst_vars([->, 'Atom', 'Atom'], _499064, [], _500004)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Atom'], [_503740|_503742], [], _500004)
^  Call: (261) [user] subst_vars(->, _503740, [], _504680)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
   Call: (262) [system] var(->)
^  Redo: (261) [user] subst_vars(->, _503740, [], _504680)
^  Unify: (261) [user] subst_vars(->, _503740, [], _504680)
   Call: (262) [system] atom(->)
   Exit: (262) [system] atom(->)
^  Call: (262) [user] symbol_concat($, _511198, ->)
^  Unify: (262) [user] symbol_concat($, _511198, ->)
   Call: (263) [system] atom_concat($, _511198, ->)
   Fail: (263) [system] atom_concat($, _511198, ->)
^  Fail: (262) [user] symbol_concat($, _511198, ->)
^  Redo: (261) [user] subst_vars(->, _503740, [], _504680)
^  Unify: (261) [user] subst_vars(->, _503740, [], _504680)
   Call: (262) [system] compound(->)
^  Redo: (261) [user] subst_vars(->, _503740, [], _504680)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
^  Exit: (261) [user] subst_vars(->, ->, [], [])
^  Call: (261) [user] subst_vars(['Atom', 'Atom'], _503742, [], _500004)
^  Unify: (261) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
   Call: (262) [system] var(['Atom', 'Atom'])
^  Redo: (261) [user] subst_vars(['Atom', 'Atom'], _5978, [], _5972)
^  Unify: (261) [user] subst_vars(['Atom', 'Atom'], [_7270|_7272], [], _5972)
^  Call: (262) [user] subst_vars('Atom', _7270, [], _8210)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (263) [system] var('Atom')
^  Redo: (262) [user] subst_vars('Atom', _7270, [], _8210)
^  Unify: (262) [user] subst_vars('Atom', _7270, [], _8210)
   Call: (263) [system] atom('Atom')
   Exit: (263) [system] atom('Atom')
^  Call: (263) [user] symbol_concat($, _14728, 'Atom')
^  Unify: (263) [user] symbol_concat($, _14728, 'Atom')
   Call: (264) [system] atom_concat($, _14728, 'Atom')
   Fail: (264) [system] atom_concat($, _14728, 'Atom')
^  Fail: (263) [user] symbol_concat($, _14728, 'Atom')
^  Redo: (262) [user] subst_vars('Atom', _7270, [], _8210)
^  Unify: (262) [user] subst_vars('Atom', _7270, [], _8210)
   Call: (263) [system] compound('Atom')
^  Redo: (262) [user] subst_vars('Atom', _7270, [], _8210)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (262) [user] subst_vars(['Atom'], _7272, [], _5972)
^  Unify: (262) [user] subst_vars(['Atom'], ['Atom'], [], [])
   Call: (263) [system] var(['Atom'])
^  Redo: (262) [user] subst_vars(['Atom'], _7272, [], _5972)
^  Unify: (262) [user] subst_vars(['Atom'], [_28728|_28730], [], _5972)
^  Call: (263) [user] subst_vars('Atom', _28728, [], _29668)
^  Unify: (263) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (264) [system] var('Atom')
^  Redo: (263) [user] subst_vars('Atom', _28728, [], _29668)
^  Unify: (263) [user] subst_vars('Atom', _28728, [], _29668)
   Call: (264) [system] atom('Atom')
   Exit: (264) [system] atom('Atom')
^  Call: (264) [user] symbol_concat($, _36186, 'Atom')
^  Unify: (264) [user] symbol_concat($, _36186, 'Atom')
   Call: (265) [system] atom_concat($, _36186, 'Atom')
   Fail: (265) [system] atom_concat($, _36186, 'Atom')
^  Fail: (264) [user] symbol_concat($, _36186, 'Atom')
^  Redo: (263) [user] subst_vars('Atom', _28728, [], _29668)
^  Unify: (263) [user] subst_vars('Atom', _28728, [], _29668)
   Call: (264) [system] compound('Atom')
^  Redo: (263) [user] subst_vars('Atom', _28728, [], _29668)
^  Unify: (263) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (263) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (263) [user] subst_vars([], _28730, [], _5972)
^  Unify: (263) [user] subst_vars([], [], [], [])
   Call: (264) [system] var([])
^  Redo: (263) [user] subst_vars([], _28730, [], _5972)
^  Unify: (263) [user] subst_vars([], [], [], [])
^  Exit: (263) [user] subst_vars([], [], [], [])
^  Exit: (262) [user] subst_vars(['Atom'], ['Atom'], [], [])
^  Exit: (261) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
^  Exit: (260) [user] subst_vars([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'], [], [])
^  Call: (260) [user] subst_vars([], _5970, [], _5948)
^  Unify: (260) [user] subst_vars([], [], [], [])
   Call: (261) [system] var([])
^  Redo: (260) [user] subst_vars([], _5970, [], _5948)
^  Unify: (260) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([], [], [], [])
^  Exit: (259) [user] subst_vars([[->, 'Atom', 'Atom']], [[->, 'Atom', 'Atom']], [], [])
^  Exit: (258) [user] subst_vars(['collapse-bind', [->, 'Atom', 'Atom']], ['collapse-bind', [->, 'Atom', 'Atom']], [], [])
^  Exit: (257) [user] subst_vars([:, 'collapse-bind', [->, 'Atom', 'Atom']], [:, 'collapse-bind', [->, 'Atom', 'Atom']], [], [])
   Call: (257) [system] _63276=metta_file_buffer(+, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(292, 11, 25, 292))
   Exit: (257) [system] metta_file_buffer(+, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(292, 11, 25, 292))=metta_file_buffer(+, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(292, 11, 25, 292))
^  Call: (257) [user] assertz(metta_file_buffer(+, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(292, 11, 25, 292)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(292, 11, 25, 292)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(292, 11, 25, 292))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(292, 11, 25, 292))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(292, 11, 25, 292))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'collapse-bind', [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(292, 11, 25, 292))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
   Redo: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _114070)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _115008))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _115008)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 325)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _114070)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _114070)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_114070))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_114070))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_114070))
   Exit: (259) [system] nonvar(position(_114070))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(325, 12, 32, 325)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(325, 12, 32, 325))
   Call: (257) [user] current_read_mode(file, _134488)
   Unify: (257) [user] current_read_mode(file, _134488)
   Call: (258) [system] nb_current(file_mode, _134488)
   Redo: (257) [user] current_read_mode(file, _134488)
   Call: (258) [system] _134488=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _140938)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _140938)
^  Call: (258) [user] clause(t_l:s_reader_info(_140938), _142884, _142806)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _140938)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _140938)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _140938)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _140938)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _140938)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _140938)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _140938)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _140938)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _156714)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (260) [system] char_type('\n', space)
   Exit: (260) [system] char_type('\n', space)
   Call: (260) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (260) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _140938)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _140938)
   Call: (261) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _140938)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _140938)
   Call: (261) [system] peek_char((0x55aefe44e2f0), _166920)
   Exit: (261) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (261) [system] char_type('(', space)
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _140938)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _140938)
^  Call: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (262) [system] string((0x55aefe44e2f0))
^  Redo: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _140938)
^  Unify: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _140938)
^  Call: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _140938)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _140938)
   Call: (263) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _140938)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _140938)
   Call: (263) [system] peek_char((0x55aefe44e2f0), _182674)
   Exit: (263) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (263) [system] char_type('(', space)
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _140938)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _140938)
   Call: (263) [system] _187316=(0x55aefe44e2f0)
   Exit: (263) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (263) [user] once((read_position((0x55aefe44e2f0), _189184, _189186, _189188, _189190), read_sexpr((0x55aefe44e2f0), _189202), assertz(metta_file_comment(_189184, _189186, _189188, _189202, _189190))))
^  Unify: (263) [system] once(user:(read_position((0x55aefe44e2f0), _189184, _189186, _189188, _189190), read_sexpr((0x55aefe44e2f0), _189202), assertz(metta_file_comment(_189184, _189186, _189188, _189202, _189190))))
^  Call: (265) [user] read_position((0x55aefe44e2f0), _189184, _189186, _189188, _189190)
^  Unify: (265) [user] read_position((0x55aefe44e2f0), _189184, _189186, _189188, _189190)
   Call: (266) [system] stream_property((0x55aefe44e2f0), position(_189190))
   Unify: (266) [system] stream_property((0x55aefe44e2f0), position(_189190))
   Call: (267) [system] nonvar((0x55aefe44e2f0))
   Exit: (267) [system] nonvar((0x55aefe44e2f0))
   Call: (267) [system] nonvar(position(_189190))
   Exit: (267) [system] nonvar(position(_189190))
   Exit: (266) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(326, 13, 0, 326)))
   Call: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(326, 13, 0, 326), _189184)
   Unify: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(326, 13, 0, 326), _189184)
   Call: (267) [system] nonvar(line_count)
   Exit: (267) [system] nonvar(line_count)
   Call: (267) [$syspreds] stream_position_field(line_count, _203172)
   Unify: (267) [$syspreds] stream_position_field(line_count, 2)
   Exit: (267) [$syspreds] stream_position_field(line_count, 2)
   Call: (267) [system] arg(2, '$stream_position'(326, 13, 0, 326), _189184)
   Exit: (267) [system] arg(2, '$stream_position'(326, 13, 0, 326), 13)
   Exit: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(326, 13, 0, 326), 13)
   Call: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(326, 13, 0, 326), _189186)
   Unify: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(326, 13, 0, 326), _189186)
   Call: (267) [system] nonvar(line_position)
   Exit: (267) [system] nonvar(line_position)
   Call: (267) [$syspreds] stream_position_field(line_position, _212466)
   Unify: (267) [$syspreds] stream_position_field(line_position, 3)
   Exit: (267) [$syspreds] stream_position_field(line_position, 3)
   Call: (267) [system] arg(3, '$stream_position'(326, 13, 0, 326), _189186)
   Exit: (267) [system] arg(3, '$stream_position'(326, 13, 0, 326), 0)
   Exit: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(326, 13, 0, 326), 0)
   Call: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(326, 13, 0, 326), _189188)
   Unify: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(326, 13, 0, 326), _189188)
   Call: (267) [system] nonvar(char_count)
   Exit: (267) [system] nonvar(char_count)
   Call: (267) [$syspreds] stream_position_field(char_count, _221760)
   Unify: (267) [$syspreds] stream_position_field(char_count, 1)
   Exit: (267) [$syspreds] stream_position_field(char_count, 1)
   Call: (267) [system] arg(1, '$stream_position'(326, 13, 0, 326), _189188)
   Exit: (267) [system] arg(1, '$stream_position'(326, 13, 0, 326), 326)
   Exit: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(326, 13, 0, 326), 326)
^  Exit: (265) [user] read_position((0x55aefe44e2f0), 13, 0, 326, '$stream_position'(326, 13, 0, 326))
^  Call: (265) [user] read_sexpr((0x55aefe44e2f0), _189202)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _189202)
   Call: (266) [system] string((0x55aefe44e2f0))
^  Redo: (265) [user] read_sexpr((0x55aefe44e2f0), _189202)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _189202)
^  Call: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _189202)
^  Unify: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _189202)
^  Call: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _236630)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (268) [system] '('=(;)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', 'white')
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', end_of_line)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', space)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', cntrl)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (267) [system] get_char((0x55aefe44e2f0), _253414)
   Exit: (267) [system] get_char((0x55aefe44e2f0), '(')
   Call: (267) [system] '('='('
   Exit: (267) [system] '('='('
^  Call: (267) [user] read_list(')', (0x55aefe44e2f0), _189202)
^  Unify: (267) [user] read_list(')', (0x55aefe44e2f0), _189202)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _260840)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, 'white')
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, end_of_line)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, space)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _277624)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), :)
   Call: (268) [system] (:)=')'
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _189202)
   Call: (268) [system] (:)=end_of_file
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _189202)
^  Call: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _283202)
^  Unify: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _283202)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _286916)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, 'white')
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, end_of_line)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, space)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, cntrl)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] get_char((0x55aefe44e2f0), _303700)
   Exit: (269) [system] get_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)='('
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _283202)
   Call: (269) [system] (:)='['
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _283202)
   Call: (269) [system] (:)='{'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _283202)
   Call: (269) [system] (:)='"'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _283202)
   Call: (269) [system] (:)=!
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _283202)
   Call: (269) [system] (:)='\''
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _283202)
   Call: (269) [system] (:)='`'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _283202)
   Call: (269) [system] (:)=end_of_file
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _283202)
^  Call: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _283202)
^  Unify: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _283202)
^  Call: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _322310)
^  Unify: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _322310)
   Call: (271) [system] peek_char((0x55aefe44e2f0), _324176)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] is_delimiter(' ')
^  Unify: (271) [user] is_delimiter(' ')
   Call: (272) [system] char_type(' ', space)
   Exit: (272) [system] char_type(' ', space)
^  Exit: (271) [user] is_delimiter(' ')
   Call: (271) [system] _322310=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (270) [user] classify_and_convert_charseq(:, [], _283202)
^  Unify: (270) [user] classify_and_convert_charseq(:, [], _283202)
^  Call: (272) [system] setup_call_cleanup('$notrace'(_335342, _335344), once(user:catch(read_from_chars([:], _283202), _335318, fail)), '$restore_trace'(_335342, _335344))
^  Unify: (272) [system] setup_call_cleanup(system:'$notrace'(_335342, _335344), system:once(user:catch(read_from_chars([:], _283202), _335318, fail)), system:'$restore_trace'(_335342, _335344))
^  Call: (273) [system] sig_atomic(system:'$notrace'(_335342, _335344))
^  Exit: (272) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([:], :), _335318, fail)), system:'$restore_trace'(3, -1))
   Call: (271) [system] atomic(:)
   Exit: (271) [system] atomic(:)
^  Exit: (270) [user] classify_and_convert_charseq(:, [], :)
^  Exit: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, :)
^  Exit: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), :)
^  Call: (268) [user] read_list(')', (0x55aefe44e2f0), _343780)
^  Unify: (268) [user] read_list(')', (0x55aefe44e2f0), _343780)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _347494)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (270) [system] ' '=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(' ')
^  Unify: (270) [user] is_like_space(' ')
   Call: (271) [system] char_type(' ', 'white')
   Exit: (271) [system] char_type(' ', 'white')
^  Exit: (270) [user] is_like_space(' ')
   Call: (270) [system] get_char((0x55aefe44e2f0), _356152)
   Exit: (270) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _359780)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), s)
   Call: (271) [system] s=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(s)
^  Unify: (271) [user] is_like_space(s)
   Call: (272) [system] char_type(s, 'white')
^  Redo: (271) [user] is_like_space(s)
^  Unify: (271) [user] is_like_space(s)
   Call: (272) [system] char_type(s, end_of_line)
^  Redo: (271) [user] is_like_space(s)
^  Unify: (271) [user] is_like_space(s)
   Call: (272) [system] char_type(s, space)
^  Redo: (271) [user] is_like_space(s)
^  Unify: (271) [user] is_like_space(s)
   Call: (272) [system] char_type(s, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _377488)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), s)
   Call: (269) [system] s=')'
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _343780)
   Call: (269) [system] s=end_of_file
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _343780)
^  Call: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _383066)
^  Unify: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _383066)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _386780)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), s)
   Call: (271) [system] s=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(s)
^  Unify: (271) [user] is_like_space(s)
   Call: (272) [system] char_type(s, 'white')
^  Redo: (271) [user] is_like_space(s)
^  Unify: (271) [user] is_like_space(s)
   Call: (272) [system] char_type(s, end_of_line)
^  Redo: (271) [user] is_like_space(s)
^  Unify: (271) [user] is_like_space(s)
   Call: (272) [system] char_type(s, space)
^  Redo: (271) [user] is_like_space(s)
^  Unify: (271) [user] is_like_space(s)
   Call: (272) [system] char_type(s, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] get_char((0x55aefe44e2f0), _403564)
   Exit: (270) [system] get_char((0x55aefe44e2f0), s)
   Call: (270) [system] s='('
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _383066)
   Call: (270) [system] s='['
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _383066)
   Call: (270) [system] s='{'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _383066)
   Call: (270) [system] s='"'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _383066)
   Call: (270) [system] s=!
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _383066)
   Call: (270) [system] s='\''
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _383066)
   Call: (270) [system] s='`'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _383066)
   Call: (270) [system] s=end_of_file
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _383066)
^  Call: (270) [user] read_symbolic(')', (0x55aefe44e2f0), s, _383066)
^  Unify: (270) [user] read_symbolic(')', (0x55aefe44e2f0), s, _383066)
^  Call: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _422174)
^  Unify: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _422174)
   Call: (272) [system] peek_char((0x55aefe44e2f0), _424040)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), u)
^  Call: (272) [user] is_delimiter(u)
^  Unify: (272) [user] is_delimiter(u)
   Call: (273) [system] char_type(u, space)
^  Redo: (272) [user] is_delimiter(u)
   Call: (273) [system] arg(_429680, v('(', ')', end_of_file), u)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _422174)
   Call: (272) [system] ')'==u
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _422174)
   Call: (272) [system] get_char((0x55aefe44e2f0), u)
   Exit: (272) [system] get_char((0x55aefe44e2f0), u)
   Call: (272) [system] u=(\)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _422174)
^  Call: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _437046)
^  Unify: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _437046)
   Call: (273) [system] peek_char((0x55aefe44e2f0), _438912)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (273) [user] is_delimiter(p)
^  Unify: (273) [user] is_delimiter(p)
   Call: (274) [system] char_type(p, space)
^  Redo: (273) [user] is_delimiter(p)
   Call: (274) [system] arg(_444552, v('(', ')', end_of_file), p)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _437046)
   Call: (273) [system] ')'==p
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _437046)
   Call: (273) [system] get_char((0x55aefe44e2f0), p)
   Exit: (273) [system] get_char((0x55aefe44e2f0), p)
   Call: (273) [system] p=(\)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _437046)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _451918)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _451918)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _453784)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (274) [user] is_delimiter(e)
^  Unify: (274) [user] is_delimiter(e)
   Call: (275) [system] char_type(e, space)
^  Redo: (274) [user] is_delimiter(e)
   Call: (275) [system] arg(_459424, v('(', ')', end_of_file), e)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _451918)
   Call: (274) [system] ')'==e
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _451918)
   Call: (274) [system] get_char((0x55aefe44e2f0), e)
   Exit: (274) [system] get_char((0x55aefe44e2f0), e)
   Call: (274) [system] e=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _451918)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _466790)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _466790)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _468656)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (275) [user] is_delimiter(r)
^  Unify: (275) [user] is_delimiter(r)
   Call: (276) [system] char_type(r, space)
^  Redo: (275) [user] is_delimiter(r)
   Call: (276) [system] arg(_474296, v('(', ')', end_of_file), r)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _466790)
   Call: (275) [system] ')'==r
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _466790)
   Call: (275) [system] get_char((0x55aefe44e2f0), r)
   Exit: (275) [system] get_char((0x55aefe44e2f0), r)
   Call: (275) [system] r=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _466790)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _481662)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _481662)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _483528)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (276) [user] is_delimiter(p)
^  Unify: (276) [user] is_delimiter(p)
   Call: (277) [system] char_type(p, space)
^  Redo: (276) [user] is_delimiter(p)
   Call: (277) [system] arg(_489168, v('(', ')', end_of_file), p)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _481662)
   Call: (276) [system] ')'==p
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _481662)
   Call: (276) [system] get_char((0x55aefe44e2f0), p)
   Exit: (276) [system] get_char((0x55aefe44e2f0), p)
   Call: (276) [system] p=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _481662)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _496534)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _496534)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _498400)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (277) [user] is_delimiter(o)
^  Unify: (277) [user] is_delimiter(o)
   Call: (278) [system] char_type(o, space)
^  Redo: (277) [user] is_delimiter(o)
   Call: (278) [system] arg(_504040, v('(', ')', end_of_file), o)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _496534)
   Call: (277) [system] ')'==o
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _496534)
   Call: (277) [system] get_char((0x55aefe44e2f0), o)
   Exit: (277) [system] get_char((0x55aefe44e2f0), o)
   Call: (277) [system] o=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _496534)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _511406)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _511406)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _513272)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (278) [user] is_delimiter(s)
^  Unify: (278) [user] is_delimiter(s)
   Call: (279) [system] char_type(s, space)
^  Redo: (278) [user] is_delimiter(s)
   Call: (279) [system] arg(_518912, v('(', ')', end_of_file), s)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _511406)
   Call: (278) [system] ')'==s
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _511406)
   Call: (278) [system] get_char((0x55aefe44e2f0), s)
   Exit: (278) [system] get_char((0x55aefe44e2f0), s)
   Call: (278) [system] s=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6014)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _8406)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _8406)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _10272)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (279) [user] is_delimiter(e)
^  Unify: (279) [user] is_delimiter(e)
   Call: (280) [system] char_type(e, space)
^  Redo: (279) [user] is_delimiter(e)
   Call: (280) [system] arg(_15912, v('(', ')', end_of_file), e)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _8406)
   Call: (279) [system] ')'==e
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _8406)
   Call: (279) [system] get_char((0x55aefe44e2f0), e)
   Exit: (279) [system] get_char((0x55aefe44e2f0), e)
   Call: (279) [system] e=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _8406)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _23278)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _23278)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _25144)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), -)
^  Call: (280) [user] is_delimiter(-)
^  Unify: (280) [user] is_delimiter(-)
   Call: (281) [system] char_type(-, space)
^  Redo: (280) [user] is_delimiter(-)
   Call: (281) [system] arg(_30784, v('(', ')', end_of_file), -)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _23278)
   Call: (280) [system] ')'==(-)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _23278)
   Call: (280) [system] get_char((0x55aefe44e2f0), -)
   Exit: (280) [system] get_char((0x55aefe44e2f0), -)
   Call: (280) [system] (-)=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _23278)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _38150)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _38150)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _40016)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), b)
^  Call: (281) [user] is_delimiter(b)
^  Unify: (281) [user] is_delimiter(b)
   Call: (282) [system] char_type(b, space)
^  Redo: (281) [user] is_delimiter(b)
   Call: (282) [system] arg(_45656, v('(', ')', end_of_file), b)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _38150)
   Call: (281) [system] ')'==b
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _38150)
   Call: (281) [system] get_char((0x55aefe44e2f0), b)
   Exit: (281) [system] get_char((0x55aefe44e2f0), b)
   Call: (281) [system] b=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _38150)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _53022)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _53022)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _54888)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (282) [user] is_delimiter(i)
^  Unify: (282) [user] is_delimiter(i)
   Call: (283) [system] char_type(i, space)
^  Redo: (282) [user] is_delimiter(i)
   Call: (283) [system] arg(_60528, v('(', ')', end_of_file), i)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _53022)
   Call: (282) [system] ')'==i
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _53022)
   Call: (282) [system] get_char((0x55aefe44e2f0), i)
   Exit: (282) [system] get_char((0x55aefe44e2f0), i)
   Call: (282) [system] i=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _53022)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _67894)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _67894)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _69760)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (283) [user] is_delimiter(n)
^  Unify: (283) [user] is_delimiter(n)
   Call: (284) [system] char_type(n, space)
^  Redo: (283) [user] is_delimiter(n)
   Call: (284) [system] arg(_75400, v('(', ')', end_of_file), n)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _67894)
   Call: (283) [system] ')'==n
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _67894)
   Call: (283) [system] get_char((0x55aefe44e2f0), n)
   Exit: (283) [system] get_char((0x55aefe44e2f0), n)
   Call: (283) [system] n=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _67894)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _82766)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _82766)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _84632)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), d)
^  Call: (284) [user] is_delimiter(d)
^  Unify: (284) [user] is_delimiter(d)
   Call: (285) [system] char_type(d, space)
^  Redo: (284) [user] is_delimiter(d)
   Call: (285) [system] arg(_90272, v('(', ')', end_of_file), d)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _82766)
   Call: (284) [system] ')'==d
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _82766)
   Call: (284) [system] get_char((0x55aefe44e2f0), d)
   Exit: (284) [system] get_char((0x55aefe44e2f0), d)
   Call: (284) [system] d=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _82766)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _97638)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _97638)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _99504)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (285) [user] is_delimiter(' ')
^  Unify: (285) [user] is_delimiter(' ')
   Call: (286) [system] char_type(' ', space)
   Exit: (286) [system] char_type(' ', space)
^  Exit: (285) [user] is_delimiter(' ')
   Call: (285) [system] _97638=[]
   Exit: (285) [system] []=[]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (284) [system] _82766=[d]
   Exit: (284) [system] [d]=[d]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [d])
   Call: (283) [system] _67894=[n, d]
   Exit: (283) [system] [n, d]=[n, d]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n, d])
   Call: (282) [system] _53022=[i, n, d]
   Exit: (282) [system] [i, n, d]=[i, n, d]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, n, d])
   Call: (281) [system] _38150=[b, i, n, d]
   Exit: (281) [system] [b, i, n, d]=[b, i, n, d]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [b, i, n, d])
   Call: (280) [system] _23278=[-, b, i, n, d]
   Exit: (280) [system] [-, b, i, n, d]=[-, b, i, n, d]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [-, b, i, n, d])
   Call: (279) [system] _8406=[e, -, b, i, n, d]
   Exit: (279) [system] [e, -, b, i, n, d]=[e, -, b, i, n, d]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, -, b, i, n, d])
   Call: (278) [system] _6014=[s, e, -, b, i, n, d]
   Exit: (278) [system] [s, e, -, b, i, n, d]=[s, e, -, b, i, n, d]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, e, -, b, i, n, d])
   Call: (277) [system] _6010=[o, s, e, -, b, i, n, d]
   Exit: (277) [system] [o, s, e, -, b, i, n, d]=[o, s, e, -, b, i, n, d]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, s, e, -, b, i, n, d])
   Call: (276) [system] _6006=[p, o, s, e, -, b, i, n, d]
   Exit: (276) [system] [p, o, s, e, -, b, i, n, d]=[p, o, s, e, -, b, i, n, d]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, o, s, e, -, b, i, n, d])
   Call: (275) [system] _6002=[r, p, o, s, e, -, b, i, n, d]
   Exit: (275) [system] [r, p, o, s, e, -, b, i, n, d]=[r, p, o, s, e, -, b, i, n, d]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, p, o, s, e, -, b, i, n, d])
   Call: (274) [system] _5998=[e, r, p, o, s, e, -, b, i, n, d]
   Exit: (274) [system] [e, r, p, o, s, e, -, b, i, n, d]=[e, r, p, o, s, e, -, b, i, n, d]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, r, p, o, s, e, -, b, i, n, d])
   Call: (273) [system] _5994=[p, e, r, p, o, s, e, -, b, i, n, d]
   Exit: (273) [system] [p, e, r, p, o, s, e, -, b, i, n, d]=[p, e, r, p, o, s, e, -, b, i, n, d]
^  Exit: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, e, r, p, o, s, e, -, b, i, n, d])
   Call: (272) [system] _5990=[u, p, e, r, p, o, s, e, -, b, i, n, d]
   Exit: (272) [system] [u, p, e, r, p, o, s, e, -, b, i, n, d]=[u, p, e, r, p, o, s, e, -, b, i, n, d]
^  Exit: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [u, p, e, r, p, o, s, e, -, b, i, n, d])
^  Call: (271) [user] classify_and_convert_charseq(s, [u, p, e, r, p, o, s, e, -, b, i, n, d], _5986)
^  Unify: (271) [user] classify_and_convert_charseq(s, [u, p, e, r, p, o, s, e, -, b, i, n, d], _5986)
^  Call: (273) [system] setup_call_cleanup('$notrace'(_146992, _146994), once(user:catch(read_from_chars([s, u, p, e, r, p, o, s, e, -, b, i, n, d], _5986), _146968, fail)), '$restore_trace'(_146992, _146994))
^  Unify: (273) [system] setup_call_cleanup(system:'$notrace'(_146992, _146994), system:once(user:catch(read_from_chars([s, u, p, e, r, p, o, s, e, -, b, i, n, d], _5986), _146968, fail)), system:'$restore_trace'(_146992, _146994))
^  Call: (274) [system] sig_atomic(system:'$notrace'(_146992, _146994))
^  Exit: (273) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([s, u, p, e, r, p, o, s, e, -, b, i, n, d], superpose-bind), _146968, fail)), system:'$restore_trace'(3, -1))
   Call: (272) [system] atomic(superpose-bind)
^  Redo: (271) [user] classify_and_convert_charseq(s, [u, p, e, r, p, o, s, e, -, b, i, n, d], _5986)
^  Unify: (271) [user] classify_and_convert_charseq(s, [u, p, e, r, p, o, s, e, -, b, i, n, d], _5986)
   Call: (272) [system] atom_chars(_5986, [s, u, p, e, r, p, o, s, e, -, b, i, n, d])
   Exit: (272) [system] atom_chars('superpose-bind', [s, u, p, e, r, p, o, s, e, -, b, i, n, d])
^  Exit: (271) [user] classify_and_convert_charseq(s, [u, p, e, r, p, o, s, e, -, b, i, n, d], 'superpose-bind')
^  Exit: (270) [user] read_symbolic(')', (0x55aefe44e2f0), s, 'superpose-bind')
^  Exit: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), 'superpose-bind')
^  Call: (269) [user] read_list(')', (0x55aefe44e2f0), _158238)
^  Unify: (269) [user] read_list(')', (0x55aefe44e2f0), _158238)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _161952)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (271) [system] ' '=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(' ')
^  Unify: (271) [user] is_like_space(' ')
   Call: (272) [system] char_type(' ', 'white')
   Exit: (272) [system] char_type(' ', 'white')
^  Exit: (271) [user] is_like_space(' ')
   Call: (271) [system] get_char((0x55aefe44e2f0), _170610)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _174238)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _191946)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (270) [system] '('=')'
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _158238)
   Call: (270) [system] '('=end_of_file
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _158238)
^  Call: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _197524)
^  Unify: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _197524)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _201238)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] get_char((0x55aefe44e2f0), _218022)
   Exit: (271) [system] get_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('='('
   Exit: (271) [system] '('='('
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _197524)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _197524)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _225448)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, 'white')
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, end_of_line)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, space)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _242232)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), -)
   Call: (272) [system] (-)=')'
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _197524)
   Call: (272) [system] (-)=end_of_file
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _197524)
^  Call: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _247810)
^  Unify: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _247810)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _251524)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, 'white')
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, end_of_line)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, space)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] get_char((0x55aefe44e2f0), _268308)
   Exit: (273) [system] get_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)='('
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _247810)
   Call: (273) [system] (-)='['
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _247810)
   Call: (273) [system] (-)='{'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _247810)
   Call: (273) [system] (-)='"'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _247810)
   Call: (273) [system] (-)=!
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _247810)
   Call: (273) [system] (-)='\''
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _247810)
   Call: (273) [system] (-)='`'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _247810)
   Call: (273) [system] (-)=end_of_file
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _247810)
^  Call: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _247810)
^  Unify: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _247810)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _286918)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _286918)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _288784)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), >)
^  Call: (275) [user] is_delimiter(>)
^  Unify: (275) [user] is_delimiter(>)
   Call: (276) [system] char_type(>, space)
^  Redo: (275) [user] is_delimiter(>)
   Call: (276) [system] arg(_294424, v('(', ')', end_of_file), >)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _286918)
   Call: (275) [system] ')'==(>)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _286918)
   Call: (275) [system] get_char((0x55aefe44e2f0), >)
   Exit: (275) [system] get_char((0x55aefe44e2f0), >)
   Call: (275) [system] (>)=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _286918)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _301790)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _301790)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _303656)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] is_delimiter(' ')
^  Unify: (276) [user] is_delimiter(' ')
   Call: (277) [system] char_type(' ', space)
   Exit: (277) [system] char_type(' ', space)
^  Exit: (276) [user] is_delimiter(' ')
   Call: (276) [system] _301790=[]
   Exit: (276) [system] []=[]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (275) [system] _286918=[>]
   Exit: (275) [system] [>]=[>]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [>])
^  Call: (274) [user] classify_and_convert_charseq(-, [>], _247810)
^  Unify: (274) [user] classify_and_convert_charseq(-, [>], _247810)
^  Call: (276) [system] setup_call_cleanup('$notrace'(_317616, _317618), once(user:catch(read_from_chars([-, >], _247810), _317592, fail)), '$restore_trace'(_317616, _317618))
^  Unify: (276) [system] setup_call_cleanup(system:'$notrace'(_317616, _317618), system:once(user:catch(read_from_chars([-, >], _247810), _317592, fail)), system:'$restore_trace'(_317616, _317618))
^  Call: (277) [system] sig_atomic(system:'$notrace'(_317616, _317618))
^  Exit: (276) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([-, >], ->), _317592, fail)), system:'$restore_trace'(3, -1))
   Call: (275) [system] atomic(->)
   Exit: (275) [system] atomic(->)
^  Exit: (274) [user] classify_and_convert_charseq(-, [>], ->)
^  Exit: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, ->)
^  Exit: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), ->)
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _326054)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _326054)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _329768)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (274) [system] ' '=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(' ')
^  Unify: (274) [user] is_like_space(' ')
   Call: (275) [system] char_type(' ', 'white')
   Exit: (275) [system] char_type(' ', 'white')
^  Exit: (274) [user] is_like_space(' ')
   Call: (274) [system] get_char((0x55aefe44e2f0), _338426)
   Exit: (274) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _342054)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', 'white')
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', end_of_line)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', space)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _359762)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (273) [system] 'A'=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _326054)
   Call: (273) [system] 'A'=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _326054)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _365340)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _365340)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _369054)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', 'white')
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', end_of_line)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', space)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _385838)
   Exit: (274) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (274) [system] 'A'='('
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _365340)
   Call: (274) [system] 'A'='['
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _365340)
   Call: (274) [system] 'A'='{'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _365340)
   Call: (274) [system] 'A'='"'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _365340)
   Call: (274) [system] 'A'=!
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _365340)
   Call: (274) [system] 'A'='\''
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _365340)
   Call: (274) [system] 'A'='`'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _365340)
   Call: (274) [system] 'A'=end_of_file
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _365340)
^  Call: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _365340)
^  Unify: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _365340)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _404448)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _404448)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _406314)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (276) [user] is_delimiter(t)
^  Unify: (276) [user] is_delimiter(t)
   Call: (277) [system] char_type(t, space)
^  Redo: (276) [user] is_delimiter(t)
   Call: (277) [system] arg(_411954, v('(', ')', end_of_file), t)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _404448)
   Call: (276) [system] ')'==t
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _404448)
   Call: (276) [system] get_char((0x55aefe44e2f0), t)
   Exit: (276) [system] get_char((0x55aefe44e2f0), t)
   Call: (276) [system] t=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _404448)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _419320)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _419320)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _421186)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (277) [user] is_delimiter(o)
^  Unify: (277) [user] is_delimiter(o)
   Call: (278) [system] char_type(o, space)
^  Redo: (277) [user] is_delimiter(o)
   Call: (278) [system] arg(_426826, v('(', ')', end_of_file), o)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _419320)
   Call: (277) [system] ')'==o
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _419320)
   Call: (277) [system] get_char((0x55aefe44e2f0), o)
   Exit: (277) [system] get_char((0x55aefe44e2f0), o)
   Call: (277) [system] o=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _419320)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _434192)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _434192)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _436058)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (278) [user] is_delimiter(m)
^  Unify: (278) [user] is_delimiter(m)
   Call: (279) [system] char_type(m, space)
^  Redo: (278) [user] is_delimiter(m)
   Call: (279) [system] arg(_441698, v('(', ')', end_of_file), m)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _434192)
   Call: (278) [system] ')'==m
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _434192)
   Call: (278) [system] get_char((0x55aefe44e2f0), m)
   Exit: (278) [system] get_char((0x55aefe44e2f0), m)
   Call: (278) [system] m=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _434192)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _449064)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _449064)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _450930)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (279) [user] is_delimiter(' ')
^  Unify: (279) [user] is_delimiter(' ')
   Call: (280) [system] char_type(' ', space)
   Exit: (280) [system] char_type(' ', space)
^  Exit: (279) [user] is_delimiter(' ')
   Call: (279) [system] _449064=[]
   Exit: (279) [system] []=[]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (278) [system] _434192=[m]
   Exit: (278) [system] [m]=[m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (277) [system] _419320=[o, m]
   Exit: (277) [system] [o, m]=[o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (276) [system] _404448=[t, o, m]
   Exit: (276) [system] [t, o, m]=[t, o, m]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (275) [user] classify_and_convert_charseq('A', [t, o, m], _365340)
^  Unify: (275) [user] classify_and_convert_charseq('A', [t, o, m], _365340)
^  Call: (277) [system] setup_call_cleanup('$notrace'(_470478, _470480), once(user:catch(read_from_chars(['A', t, o, m], _365340), _470454, fail)), '$restore_trace'(_470478, _470480))
^  Unify: (277) [system] setup_call_cleanup(system:'$notrace'(_470478, _470480), system:once(user:catch(read_from_chars(['A', t, o, m], _365340), _470454, fail)), system:'$restore_trace'(_470478, _470480))
^  Call: (278) [system] sig_atomic(system:'$notrace'(_470478, _470480))
^  Exit: (277) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _365340), _470454, fail)), system:'$restore_trace'(3, -1))
   Call: (276) [system] atomic(_365340)
^  Redo: (275) [user] classify_and_convert_charseq('A', [t, o, m], _365340)
^  Unify: (275) [user] classify_and_convert_charseq('A', [t, o, m], _365340)
   Call: (276) [system] atom_chars(_365340, ['A', t, o, m])
   Exit: (276) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (275) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (273) [user] read_list(')', (0x55aefe44e2f0), _481732)
^  Unify: (273) [user] read_list(')', (0x55aefe44e2f0), _481732)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _485446)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (275) [system] ' '=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(' ')
^  Unify: (275) [user] is_like_space(' ')
   Call: (276) [system] char_type(' ', 'white')
   Exit: (276) [system] char_type(' ', 'white')
^  Exit: (275) [user] is_like_space(' ')
   Call: (275) [system] get_char((0x55aefe44e2f0), _494104)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _497732)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _515440)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (274) [system] 'A'=')'
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _481732)
   Call: (274) [system] 'A'=end_of_file
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _481732)
^  Call: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _521018)
^  Unify: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _521018)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _6758)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] get_char((0x55aefe44e2f0), _23542)
   Exit: (275) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'='('
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _6010)
   Call: (275) [system] 'A'='['
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _6010)
   Call: (275) [system] 'A'='{'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _6010)
   Call: (275) [system] 'A'='"'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _6010)
   Call: (275) [system] 'A'=!
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _6010)
   Call: (275) [system] 'A'='\''
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _6010)
   Call: (275) [system] 'A'='`'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _6010)
   Call: (275) [system] 'A'=end_of_file
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _6010)
^  Call: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _6010)
^  Unify: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _6010)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _42152)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _42152)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _44018)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (277) [user] is_delimiter(t)
^  Unify: (277) [user] is_delimiter(t)
   Call: (278) [system] char_type(t, space)
^  Redo: (277) [user] is_delimiter(t)
   Call: (278) [system] arg(_49658, v('(', ')', end_of_file), t)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _42152)
   Call: (277) [system] ')'==t
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _42152)
   Call: (277) [system] get_char((0x55aefe44e2f0), t)
   Exit: (277) [system] get_char((0x55aefe44e2f0), t)
   Call: (277) [system] t=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _42152)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _57024)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _57024)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _58890)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (278) [user] is_delimiter(o)
^  Unify: (278) [user] is_delimiter(o)
   Call: (279) [system] char_type(o, space)
^  Redo: (278) [user] is_delimiter(o)
   Call: (279) [system] arg(_64530, v('(', ')', end_of_file), o)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _57024)
   Call: (278) [system] ')'==o
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _57024)
   Call: (278) [system] get_char((0x55aefe44e2f0), o)
   Exit: (278) [system] get_char((0x55aefe44e2f0), o)
   Call: (278) [system] o=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _57024)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _71896)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _71896)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _73762)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (279) [user] is_delimiter(m)
^  Unify: (279) [user] is_delimiter(m)
   Call: (280) [system] char_type(m, space)
^  Redo: (279) [user] is_delimiter(m)
   Call: (280) [system] arg(_79402, v('(', ')', end_of_file), m)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _71896)
   Call: (279) [system] ')'==m
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _71896)
   Call: (279) [system] get_char((0x55aefe44e2f0), m)
   Exit: (279) [system] get_char((0x55aefe44e2f0), m)
   Call: (279) [system] m=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _71896)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _86768)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _86768)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _88634)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (280) [user] is_delimiter(')')
^  Unify: (280) [user] is_delimiter(')')
   Call: (281) [system] char_type(')', space)
^  Redo: (280) [user] is_delimiter(')')
   Call: (281) [system] arg(_94274, v('(', ')', end_of_file), ')')
   Exit: (281) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (280) [user] is_delimiter(')')
   Call: (280) [system] _86768=[]
   Exit: (280) [system] []=[]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (279) [system] _71896=[m]
   Exit: (279) [system] [m]=[m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (278) [system] _57024=[o, m]
   Exit: (278) [system] [o, m]=[o, m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (277) [system] _42152=[t, o, m]
   Exit: (277) [system] [t, o, m]=[t, o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (276) [user] classify_and_convert_charseq('A', [t, o, m], _6010)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _6010)
^  Call: (278) [system] setup_call_cleanup('$notrace'(_110050, _110052), once(user:catch(read_from_chars(['A', t, o, m], _6010), _110026, fail)), '$restore_trace'(_110050, _110052))
^  Unify: (278) [system] setup_call_cleanup(system:'$notrace'(_110050, _110052), system:once(user:catch(read_from_chars(['A', t, o, m], _6010), _110026, fail)), system:'$restore_trace'(_110050, _110052))
^  Call: (279) [system] sig_atomic(system:'$notrace'(_110050, _110052))
^  Exit: (278) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _6010), _110026, fail)), system:'$restore_trace'(3, -1))
   Call: (277) [system] atomic(_6010)
^  Redo: (276) [user] classify_and_convert_charseq('A', [t, o, m], _6010)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _6010)
   Call: (277) [system] atom_chars(_6010, ['A', t, o, m])
   Exit: (277) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (276) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _121304)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _121304)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _125018)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (276) [system] ')'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', 'white')
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', end_of_line)
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', space)
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _141802)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (275) [system] ')'=')'
   Exit: (275) [system] ')'=')'
   Call: (275) [system] get_char((0x55aefe44e2f0), _145592)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ')')
   Call: (275) [system] _121304=[]
   Exit: (275) [system] []=[]
^  Exit: (274) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (274) [system] _6006=['Atom']
   Exit: (274) [system] ['Atom']=['Atom']
^  Exit: (273) [user] read_list(')', (0x55aefe44e2f0), ['Atom'])
   Call: (273) [system] _6000=['Atom', 'Atom']
   Exit: (273) [system] ['Atom', 'Atom']=['Atom', 'Atom']
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Atom'])
   Call: (272) [system] _5992=[->, 'Atom', 'Atom']
   Exit: (272) [system] [->, 'Atom', 'Atom']=[->, 'Atom', 'Atom']
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [->, 'Atom', 'Atom'])
^  Exit: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), [->, 'Atom', 'Atom'])
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _159474)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _159474)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _163188)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (272) [system] ')'=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', 'white')
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', end_of_line)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', space)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _179972)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (271) [system] ')'=')'
   Exit: (271) [system] ')'=')'
   Call: (271) [system] get_char((0x55aefe44e2f0), _183762)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ')')
   Call: (271) [system] _159474=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (270) [system] _5988=[[->, 'Atom', 'Atom']]
   Exit: (270) [system] [[->, 'Atom', 'Atom']]=[[->, 'Atom', 'Atom']]
^  Exit: (269) [user] read_list(')', (0x55aefe44e2f0), [[->, 'Atom', 'Atom']])
   Call: (269) [system] _5982=['superpose-bind', [->, 'Atom', 'Atom']]
   Exit: (269) [system] ['superpose-bind', [->, 'Atom', 'Atom']]=['superpose-bind', [->, 'Atom', 'Atom']]
^  Exit: (268) [user] read_list(')', (0x55aefe44e2f0), ['superpose-bind', [->, 'Atom', 'Atom']])
   Call: (268) [system] _5942=[:, 'superpose-bind', [->, 'Atom', 'Atom']]
   Exit: (268) [system] [:, 'superpose-bind', [->, 'Atom', 'Atom']]=[:, 'superpose-bind', [->, 'Atom', 'Atom']]
^  Exit: (267) [user] read_list(')', (0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Exit: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Exit: (265) [user] read_sexpr((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Call: (265) [user] assertz(metta_file_comment(13, 0, 326, [:, 'superpose-bind', [->, 'Atom', 'Atom']], '$stream_position'(326, 13, 0, 326)))
^  Exit: (265) [user] assertz(metta_file_comment(13, 0, 326, [:, 'superpose-bind', [->, 'Atom', 'Atom']], '$stream_position'(326, 13, 0, 326)))
^  Exit: (263) [system] once(user:(read_position((0x55aefe44e2f0), 13, 0, 326, '$stream_position'(326, 13, 0, 326)), read_sexpr((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Atom', 'Atom']]), assertz(metta_file_comment(13, 0, 326, [:, 'superpose-bind', [->, 'Atom', 'Atom']], '$stream_position'(326, 13, 0, 326)))))
   Call: (263) [system] fail
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Call: (263) [user] retract(metta_file_comment(_204136, _204138, _204140, _204142, _204144))
^  Exit: (263) [user] retract(metta_file_comment(13, 0, 326, [:, 'superpose-bind', [->, 'Atom', 'Atom']], '$stream_position'(326, 13, 0, 326)))
^  Call: (263) [user] trly(untyped_to_metta, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _5908)
^  Call: (264) [user] once(call(untyped_to_metta, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _207922))
^  Unify: (264) [system] once(user:call(untyped_to_metta, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _207922))
^  Call: (265) [user] call(untyped_to_metta, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _207922)
^  Unify: (265) [system] call(user:untyped_to_metta, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _207922)
^  Call: (266) [user] untyped_to_metta([:, 'superpose-bind', [->, 'Atom', 'Atom']], _207922)
^  Unify: (266) [user] untyped_to_metta([:, 'superpose-bind', [->, 'Atom', 'Atom']], _207922)
^  Call: (267) [user] must_det_ll(trly(mfix_vars1, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _213534))
^  Unify: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _213534))
^  Call: (268) [user] once(user:trly(mfix_vars1, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _213534))
^  Unify: (268) [system] once(user:trly(mfix_vars1, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _213534))
^  Call: (269) [user] trly(mfix_vars1, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _213534)
^  Unify: (269) [user] trly(mfix_vars1, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _213534)
^  Call: (270) [user] once(call(mfix_vars1, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120))
^  Unify: (270) [system] once(user:call(mfix_vars1, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120))
^  Call: (271) [user] call(mfix_vars1, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120)
^  Unify: (271) [system] call(user:mfix_vars1, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120)
^  Call: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120)
^  Unify: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120)
   Call: (273) [system] var([:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Redo: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120)
^  Unify: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Atom', 'Atom']], '$VAR'(_226580))
   Call: (273) [system] atom([:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Redo: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120)
^  Unify: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120)
   Call: (273) [system] [:, 'superpose-bind', [->, 'Atom', 'Atom']]==true
^  Redo: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120)
^  Unify: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120)
   Call: (273) [system] [:, 'superpose-bind', [->, 'Atom', 'Atom']]==false
^  Redo: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120)
^  Unify: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120)
   Call: (273) [system] (:)=='['
^  Redo: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120)
^  Unify: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120)
   Call: (273) [system] (:)=='{'
^  Redo: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120)
^  Unify: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120)
   Call: (273) [system] is_list(['superpose-bind', [->, 'Atom', 'Atom']])
   Exit: (273) [system] is_list(['superpose-bind', [->, 'Atom', 'Atom']])
   Call: (273) [lists] lists:last(['superpose-bind', [->, 'Atom', 'Atom']], _243274)
   Unify: (273) [lists] lists:last(['superpose-bind', [->, 'Atom', 'Atom']], _243274)
   Call: (274) [lists] lists:last_([[->, 'Atom', 'Atom']], 'superpose-bind', _243274)
   Unify: (274) [lists] lists:last_([[->, 'Atom', 'Atom']], 'superpose-bind', _243274)
   Call: (275) [lists] lists:last_([], [->, 'Atom', 'Atom'], _243274)
   Unify: (275) [lists] lists:last_([], [->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
   Exit: (275) [lists] lists:last_([], [->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
   Exit: (274) [lists] lists:last_([[->, 'Atom', 'Atom']], 'superpose-bind', [->, 'Atom', 'Atom'])
   Exit: (273) [lists] lists:last(['superpose-bind', [->, 'Atom', 'Atom']], [->, 'Atom', 'Atom'])
   Call: (273) [system] [->, 'Atom', 'Atom']=='}'
^  Redo: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120)
^  Unify: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120)
   Call: (273) [system] [:, 'superpose-bind', [->, 'Atom', 'Atom']]==[_254438, _254444]
^  Redo: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120)
^  Unify: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120)
   Call: (273) [system] fail
^  Redo: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120)
^  Unify: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120)
   Call: (273) [system] is_list([:, 'superpose-bind', [->, 'Atom', 'Atom']])
   Exit: (273) [system] is_list([:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Call: (273) [user] apply:maplist(mfix_vars1, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120)
^  Unify: (273) [apply] apply:maplist(user:mfix_vars1, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120)
   Call: (274) [apply] apply:maplist_([:, 'superpose-bind', [->, 'Atom', 'Atom']], _219120, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([:, 'superpose-bind', [->, 'Atom', 'Atom']], [_264668|_264670], user:mfix_vars1)
^  Call: (275) [user] mfix_vars1(:, _264668)
^  Unify: (275) [user] mfix_vars1(:, _264668)
   Call: (276) [system] var(:)
^  Redo: (275) [user] mfix_vars1(:, _264668)
^  Unify: (275) [user] mfix_vars1(:, '$VAR'(_269314))
   Call: (276) [system] atom(:)
   Exit: (276) [system] atom(:)
^  Call: (276) [user] symbol_concat($, _272092, :)
^  Unify: (276) [user] symbol_concat($, _272092, :)
   Call: (277) [system] atom_concat($, _272092, :)
   Fail: (277) [system] atom_concat($, _272092, :)
^  Fail: (276) [user] symbol_concat($, _272092, :)
^  Redo: (275) [user] mfix_vars1(:, _264668)
^  Unify: (275) [user] mfix_vars1(:, _264668)
   Call: (276) [system] (:)==true
^  Redo: (275) [user] mfix_vars1(:, _264668)
^  Unify: (275) [user] mfix_vars1(:, _264668)
   Call: (276) [system] (:)==false
^  Redo: (275) [user] mfix_vars1(:, _264668)
^  Unify: (275) [user] mfix_vars1(:, _264668)
   Call: (276) [system] (:)==[_284180, _284186]
^  Redo: (275) [user] mfix_vars1(:, _264668)
^  Unify: (275) [user] mfix_vars1(:, _264668)
   Call: (276) [system] is_list(:)
^  Redo: (275) [user] mfix_vars1(:, _264668)
^  Unify: (275) [user] mfix_vars1(:, _264668)
   Call: (276) [system] string(:)
^  Redo: (275) [user] mfix_vars1(:, _264668)
^  Unify: (275) [user] mfix_vars1(:, _264668)
   Call: (276) [system] compound(:)
^  Redo: (275) [user] mfix_vars1(:, _264668)
^  Unify: (275) [user] mfix_vars1(:, _264668)
^  Call: (276) [user] symbol(:)
^  Unify: (276) [user] symbol(:)
   Call: (277) [system] atom(:)
   Exit: (277) [system] atom(:)
^  Exit: (276) [user] symbol(:)
^  Unify: (275) [user] mfix_vars1(:, :)
^  Exit: (275) [user] mfix_vars1(:, :)
   Call: (275) [apply] apply:maplist_(['superpose-bind', [->, 'Atom', 'Atom']], _264670, user:mfix_vars1)
   Unify: (275) [apply] apply:maplist_(['superpose-bind', [->, 'Atom', 'Atom']], [_302724|_302726], user:mfix_vars1)
^  Call: (276) [user] mfix_vars1('superpose-bind', _302724)
^  Unify: (276) [user] mfix_vars1('superpose-bind', _302724)
   Call: (277) [system] var('superpose-bind')
^  Redo: (276) [user] mfix_vars1('superpose-bind', _302724)
^  Unify: (276) [user] mfix_vars1('superpose-bind', '$VAR'(_307370))
   Call: (277) [system] atom('superpose-bind')
   Exit: (277) [system] atom('superpose-bind')
^  Call: (277) [user] symbol_concat($, _310148, 'superpose-bind')
^  Unify: (277) [user] symbol_concat($, _310148, 'superpose-bind')
   Call: (278) [system] atom_concat($, _310148, 'superpose-bind')
   Fail: (278) [system] atom_concat($, _310148, 'superpose-bind')
^  Fail: (277) [user] symbol_concat($, _310148, 'superpose-bind')
^  Redo: (276) [user] mfix_vars1('superpose-bind', _302724)
^  Unify: (276) [user] mfix_vars1('superpose-bind', _302724)
   Call: (277) [system] 'superpose-bind'==true
^  Redo: (276) [user] mfix_vars1('superpose-bind', _302724)
^  Unify: (276) [user] mfix_vars1('superpose-bind', _302724)
   Call: (277) [system] 'superpose-bind'==false
^  Redo: (276) [user] mfix_vars1('superpose-bind', _302724)
^  Unify: (276) [user] mfix_vars1('superpose-bind', _302724)
   Call: (277) [system] 'superpose-bind'==[_322236, _322242]
^  Redo: (276) [user] mfix_vars1('superpose-bind', _302724)
^  Unify: (276) [user] mfix_vars1('superpose-bind', _302724)
   Call: (277) [system] is_list('superpose-bind')
^  Redo: (276) [user] mfix_vars1('superpose-bind', _302724)
^  Unify: (276) [user] mfix_vars1('superpose-bind', _302724)
   Call: (277) [system] string('superpose-bind')
^  Redo: (276) [user] mfix_vars1('superpose-bind', _302724)
^  Unify: (276) [user] mfix_vars1('superpose-bind', _302724)
   Call: (277) [system] compound('superpose-bind')
^  Redo: (276) [user] mfix_vars1('superpose-bind', _302724)
^  Unify: (276) [user] mfix_vars1('superpose-bind', _302724)
^  Call: (277) [user] symbol('superpose-bind')
^  Unify: (277) [user] symbol('superpose-bind')
   Call: (278) [system] atom('superpose-bind')
   Exit: (278) [system] atom('superpose-bind')
^  Exit: (277) [user] symbol('superpose-bind')
^  Unify: (276) [user] mfix_vars1('superpose-bind', 'superpose-bind')
^  Exit: (276) [user] mfix_vars1('superpose-bind', 'superpose-bind')
   Call: (276) [apply] apply:maplist_([[->, 'Atom', 'Atom']], _302726, user:mfix_vars1)
   Unify: (276) [apply] apply:maplist_([[->, 'Atom', 'Atom']], [_340780|_340782], user:mfix_vars1)
^  Call: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _340780)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _340780)
   Call: (278) [system] var([->, 'Atom', 'Atom'])
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _340780)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], '$VAR'(_345426))
   Call: (278) [system] atom([->, 'Atom', 'Atom'])
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _340780)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _340780)
   Call: (278) [system] [->, 'Atom', 'Atom']==true
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _340780)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _340780)
   Call: (278) [system] [->, 'Atom', 'Atom']==false
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _340780)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _340780)
   Call: (278) [system] (->)=='['
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _340780)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _340780)
   Call: (278) [system] (->)=='{'
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _340780)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _340780)
   Call: (278) [system] is_list(['Atom', 'Atom'])
   Exit: (278) [system] is_list(['Atom', 'Atom'])
   Call: (278) [lists] lists:last(['Atom', 'Atom'], _362120)
   Unify: (278) [lists] lists:last(['Atom', 'Atom'], _362120)
   Call: (279) [lists] lists:last_(['Atom'], 'Atom', _362120)
   Unify: (279) [lists] lists:last_(['Atom'], 'Atom', _362120)
   Call: (280) [lists] lists:last_([], 'Atom', _362120)
   Unify: (280) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (280) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (279) [lists] lists:last_(['Atom'], 'Atom', 'Atom')
   Exit: (278) [lists] lists:last(['Atom', 'Atom'], 'Atom')
   Call: (278) [system] 'Atom'=='}'
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _340780)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _340780)
   Call: (278) [system] [->, 'Atom', 'Atom']==[_373284, _373290]
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _340780)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _340780)
   Call: (278) [system] fail
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _340780)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], _340780)
   Call: (278) [system] is_list([->, 'Atom', 'Atom'])
   Exit: (278) [system] is_list([->, 'Atom', 'Atom'])
^  Call: (278) [user] apply:maplist(mfix_vars1, [->, 'Atom', 'Atom'], _340780)
^  Unify: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Atom'], _340780)
   Call: (279) [apply] apply:maplist_([->, 'Atom', 'Atom'], _340780, user:mfix_vars1)
   Unify: (279) [apply] apply:maplist_([->, 'Atom', 'Atom'], [_383514|_383516], user:mfix_vars1)
^  Call: (280) [user] mfix_vars1(->, _383514)
^  Unify: (280) [user] mfix_vars1(->, _383514)
   Call: (281) [system] var(->)
^  Redo: (280) [user] mfix_vars1(->, _383514)
^  Unify: (280) [user] mfix_vars1(->, '$VAR'(_388160))
   Call: (281) [system] atom(->)
   Exit: (281) [system] atom(->)
^  Call: (281) [user] symbol_concat($, _390938, ->)
^  Unify: (281) [user] symbol_concat($, _390938, ->)
   Call: (282) [system] atom_concat($, _390938, ->)
   Fail: (282) [system] atom_concat($, _390938, ->)
^  Fail: (281) [user] symbol_concat($, _390938, ->)
^  Redo: (280) [user] mfix_vars1(->, _383514)
^  Unify: (280) [user] mfix_vars1(->, _383514)
   Call: (281) [system] (->)==true
^  Redo: (280) [user] mfix_vars1(->, _383514)
^  Unify: (280) [user] mfix_vars1(->, _383514)
   Call: (281) [system] (->)==false
^  Redo: (280) [user] mfix_vars1(->, _383514)
^  Unify: (280) [user] mfix_vars1(->, _383514)
   Call: (281) [system] (->)==[_403026, _403032]
^  Redo: (280) [user] mfix_vars1(->, _383514)
^  Unify: (280) [user] mfix_vars1(->, _383514)
   Call: (281) [system] is_list(->)
^  Redo: (280) [user] mfix_vars1(->, _383514)
^  Unify: (280) [user] mfix_vars1(->, _383514)
   Call: (281) [system] string(->)
^  Redo: (280) [user] mfix_vars1(->, _383514)
^  Unify: (280) [user] mfix_vars1(->, _383514)
   Call: (281) [system] compound(->)
^  Redo: (280) [user] mfix_vars1(->, _383514)
^  Unify: (280) [user] mfix_vars1(->, _383514)
^  Call: (281) [user] symbol(->)
^  Unify: (281) [user] symbol(->)
   Call: (282) [system] atom(->)
   Exit: (282) [system] atom(->)
^  Exit: (281) [user] symbol(->)
^  Unify: (280) [user] mfix_vars1(->, ->)
^  Exit: (280) [user] mfix_vars1(->, ->)
   Call: (280) [apply] apply:maplist_(['Atom', 'Atom'], _383516, user:mfix_vars1)
   Unify: (280) [apply] apply:maplist_(['Atom', 'Atom'], [_421570|_421572], user:mfix_vars1)
^  Call: (281) [user] mfix_vars1('Atom', _421570)
^  Unify: (281) [user] mfix_vars1('Atom', _421570)
   Call: (282) [system] var('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _421570)
^  Unify: (281) [user] mfix_vars1('Atom', '$VAR'(_426216))
   Call: (282) [system] atom('Atom')
   Exit: (282) [system] atom('Atom')
^  Call: (282) [user] symbol_concat($, _428994, 'Atom')
^  Unify: (282) [user] symbol_concat($, _428994, 'Atom')
   Call: (283) [system] atom_concat($, _428994, 'Atom')
   Fail: (283) [system] atom_concat($, _428994, 'Atom')
^  Fail: (282) [user] symbol_concat($, _428994, 'Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _421570)
^  Unify: (281) [user] mfix_vars1('Atom', _421570)
   Call: (282) [system] 'Atom'==true
^  Redo: (281) [user] mfix_vars1('Atom', _421570)
^  Unify: (281) [user] mfix_vars1('Atom', _421570)
   Call: (282) [system] 'Atom'==false
^  Redo: (281) [user] mfix_vars1('Atom', _421570)
^  Unify: (281) [user] mfix_vars1('Atom', _421570)
   Call: (282) [system] 'Atom'==[_441082, _441088]
^  Redo: (281) [user] mfix_vars1('Atom', _421570)
^  Unify: (281) [user] mfix_vars1('Atom', _421570)
   Call: (282) [system] is_list('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _421570)
^  Unify: (281) [user] mfix_vars1('Atom', _421570)
   Call: (282) [system] string('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _421570)
^  Unify: (281) [user] mfix_vars1('Atom', _421570)
   Call: (282) [system] compound('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _421570)
^  Unify: (281) [user] mfix_vars1('Atom', _421570)
^  Call: (282) [user] symbol('Atom')
^  Unify: (282) [user] symbol('Atom')
   Call: (283) [system] atom('Atom')
   Exit: (283) [system] atom('Atom')
^  Exit: (282) [user] symbol('Atom')
^  Unify: (281) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (281) [user] mfix_vars1('Atom', 'Atom')
   Call: (281) [apply] apply:maplist_(['Atom'], _421572, user:mfix_vars1)
   Unify: (281) [apply] apply:maplist_(['Atom'], [_459626|_459628], user:mfix_vars1)
^  Call: (282) [user] mfix_vars1('Atom', _459626)
^  Unify: (282) [user] mfix_vars1('Atom', _459626)
   Call: (283) [system] var('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _459626)
^  Unify: (282) [user] mfix_vars1('Atom', '$VAR'(_464272))
   Call: (283) [system] atom('Atom')
   Exit: (283) [system] atom('Atom')
^  Call: (283) [user] symbol_concat($, _467050, 'Atom')
^  Unify: (283) [user] symbol_concat($, _467050, 'Atom')
   Call: (284) [system] atom_concat($, _467050, 'Atom')
   Fail: (284) [system] atom_concat($, _467050, 'Atom')
^  Fail: (283) [user] symbol_concat($, _467050, 'Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _459626)
^  Unify: (282) [user] mfix_vars1('Atom', _459626)
   Call: (283) [system] 'Atom'==true
^  Redo: (282) [user] mfix_vars1('Atom', _459626)
^  Unify: (282) [user] mfix_vars1('Atom', _459626)
   Call: (283) [system] 'Atom'==false
^  Redo: (282) [user] mfix_vars1('Atom', _459626)
^  Unify: (282) [user] mfix_vars1('Atom', _459626)
   Call: (283) [system] 'Atom'==[_479138, _479144]
^  Redo: (282) [user] mfix_vars1('Atom', _459626)
^  Unify: (282) [user] mfix_vars1('Atom', _459626)
   Call: (283) [system] is_list('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _459626)
^  Unify: (282) [user] mfix_vars1('Atom', _459626)
   Call: (283) [system] string('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _459626)
^  Unify: (282) [user] mfix_vars1('Atom', _459626)
   Call: (283) [system] compound('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _459626)
^  Unify: (282) [user] mfix_vars1('Atom', _459626)
^  Call: (283) [user] symbol('Atom')
^  Unify: (283) [user] symbol('Atom')
   Call: (284) [system] atom('Atom')
   Exit: (284) [system] atom('Atom')
^  Exit: (283) [user] symbol('Atom')
^  Unify: (282) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (282) [user] mfix_vars1('Atom', 'Atom')
   Call: (282) [apply] apply:maplist_([], _459628, user:mfix_vars1)
   Unify: (282) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (282) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (281) [apply] apply:maplist_(['Atom'], ['Atom'], user:mfix_vars1)
   Exit: (280) [apply] apply:maplist_(['Atom', 'Atom'], ['Atom', 'Atom'], user:mfix_vars1)
   Exit: (279) [apply] apply:maplist_([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'], user:mfix_vars1)
^  Exit: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
^  Exit: (277) [user] mfix_vars1([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
   Call: (277) [apply] apply:maplist_([], _340782, user:mfix_vars1)
   Unify: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (276) [apply] apply:maplist_([[->, 'Atom', 'Atom']], [[->, 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (275) [apply] apply:maplist_(['superpose-bind', [->, 'Atom', 'Atom']], ['superpose-bind', [->, 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']], user:mfix_vars1)
^  Exit: (273) [apply] apply:maplist(user:mfix_vars1, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Exit: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Exit: (271) [system] call(user:mfix_vars1, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Exit: (270) [system] once(user:call(mfix_vars1, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']]))
   Call: (270) [system] [:, 'superpose-bind', [->, 'Atom', 'Atom']]\=@=[:, 'superpose-bind', [->, 'Atom', 'Atom']]
^  Redo: (269) [user] trly(mfix_vars1, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _213534)
^  Unify: (269) [user] trly(mfix_vars1, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Exit: (269) [user] trly(mfix_vars1, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Exit: (268) [system] once(user:trly(mfix_vars1, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_c, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _519116))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_c, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _519116))
^  Call: (268) [user] once(user:trly(cons_to_c, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _519116))
^  Unify: (268) [system] once(user:trly(cons_to_c, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _519116))
^  Call: (269) [user] trly(cons_to_c, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _519116)
^  Unify: (269) [user] trly(cons_to_c, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _5978)
^  Call: (270) [user] once(call(cons_to_c, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _6742))
^  Unify: (270) [system] once(user:call(cons_to_c, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _6742))
^  Call: (271) [user] call(cons_to_c, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _6742)
^  Unify: (271) [system] call(user:cons_to_c, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _6742)
^  Call: (272) [user] cons_to_c([:, 'superpose-bind', [->, 'Atom', 'Atom']], _6742)
^  Unify: (272) [user] cons_to_c([:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_c([:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Exit: (271) [system] call(user:cons_to_c, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Exit: (270) [system] once(user:call(cons_to_c, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']]))
   Call: (270) [system] [:, 'superpose-bind', [->, 'Atom', 'Atom']]\=@=[:, 'superpose-bind', [->, 'Atom', 'Atom']]
^  Redo: (269) [user] trly(cons_to_c, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _5978)
^  Unify: (269) [user] trly(cons_to_c, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Exit: (269) [user] trly(cons_to_c, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Exit: (268) [system] once(user:trly(cons_to_c, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_c, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_l, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _5956))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_l, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _5956))
^  Call: (268) [user] once(user:trly(cons_to_l, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _5956))
^  Unify: (268) [system] once(user:trly(cons_to_l, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _5956))
^  Call: (269) [user] trly(cons_to_l, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _5956)
^  Unify: (269) [user] trly(cons_to_l, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _5956)
^  Call: (270) [user] once(call(cons_to_l, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _29062))
^  Unify: (270) [system] once(user:call(cons_to_l, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _29062))
^  Call: (271) [user] call(cons_to_l, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _29062)
^  Unify: (271) [system] call(user:cons_to_l, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _29062)
^  Call: (272) [user] cons_to_l([:, 'superpose-bind', [->, 'Atom', 'Atom']], _29062)
^  Unify: (272) [user] cons_to_l([:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_l([:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Exit: (271) [system] call(user:cons_to_l, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Exit: (270) [system] once(user:call(cons_to_l, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']]))
   Call: (270) [system] [:, 'superpose-bind', [->, 'Atom', 'Atom']]\=@=[:, 'superpose-bind', [->, 'Atom', 'Atom']]
^  Redo: (269) [user] trly(cons_to_l, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _5956)
^  Unify: (269) [user] trly(cons_to_l, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Exit: (269) [user] trly(cons_to_l, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Exit: (268) [system] once(user:trly(cons_to_l, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_l, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']]))
^  Exit: (266) [user] untyped_to_metta([:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Exit: (265) [system] call(user:untyped_to_metta, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Exit: (264) [system] once(user:call(untyped_to_metta, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']]))
   Call: (264) [system] [:, 'superpose-bind', [->, 'Atom', 'Atom']]\=@=[:, 'superpose-bind', [->, 'Atom', 'Atom']]
^  Redo: (263) [user] trly(untyped_to_metta, [:, 'superpose-bind', [->, 'Atom', 'Atom']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Exit: (263) [user] trly(untyped_to_metta, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Exit: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Atom', 'Atom']])
   Call: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Atom', 'Atom']])))
   Unify: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Atom', 'Atom']])))
   Exit: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Atom', 'Atom']])))
^  Exit: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Exit: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Atom', 'Atom']])
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Atom', 'Atom']])))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Atom', 'Atom']])))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Atom', 'Atom']])))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Call: (257) [user] subst_vars([:, 'superpose-bind', [->, 'Atom', 'Atom']], _63370, [], _63372)
^  Unify: (257) [user] subst_vars([:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']], [], [])
   Call: (258) [system] var([:, 'superpose-bind', [->, 'Atom', 'Atom']])
^  Redo: (257) [user] subst_vars([:, 'superpose-bind', [->, 'Atom', 'Atom']], _63370, [], _63372)
^  Unify: (257) [user] subst_vars([:, 'superpose-bind', [->, 'Atom', 'Atom']], [_67108|_67110], [], _63372)
^  Call: (258) [user] subst_vars(:, _67108, [], _68048)
^  Unify: (258) [user] subst_vars(:, :, [], [])
   Call: (259) [system] var(:)
^  Redo: (258) [user] subst_vars(:, _67108, [], _68048)
^  Unify: (258) [user] subst_vars(:, _67108, [], _68048)
   Call: (259) [system] atom(:)
   Exit: (259) [system] atom(:)
^  Call: (259) [user] symbol_concat($, _74566, :)
^  Unify: (259) [user] symbol_concat($, _74566, :)
   Call: (260) [system] atom_concat($, _74566, :)
   Fail: (260) [system] atom_concat($, _74566, :)
^  Fail: (259) [user] symbol_concat($, _74566, :)
^  Redo: (258) [user] subst_vars(:, _67108, [], _68048)
^  Unify: (258) [user] subst_vars(:, _67108, [], _68048)
   Call: (259) [system] compound(:)
^  Redo: (258) [user] subst_vars(:, _67108, [], _68048)
^  Unify: (258) [user] subst_vars(:, :, [], [])
^  Exit: (258) [user] subst_vars(:, :, [], [])
^  Call: (258) [user] subst_vars(['superpose-bind', [->, 'Atom', 'Atom']], _67110, [], _63372)
^  Unify: (258) [user] subst_vars(['superpose-bind', [->, 'Atom', 'Atom']], ['superpose-bind', [->, 'Atom', 'Atom']], [], [])
   Call: (259) [system] var(['superpose-bind', [->, 'Atom', 'Atom']])
^  Redo: (258) [user] subst_vars(['superpose-bind', [->, 'Atom', 'Atom']], _67110, [], _63372)
^  Unify: (258) [user] subst_vars(['superpose-bind', [->, 'Atom', 'Atom']], [_88566|_88568], [], _63372)
^  Call: (259) [user] subst_vars('superpose-bind', _88566, [], _89506)
^  Unify: (259) [user] subst_vars('superpose-bind', 'superpose-bind', [], [])
   Call: (260) [system] var('superpose-bind')
^  Redo: (259) [user] subst_vars('superpose-bind', _88566, [], _89506)
^  Unify: (259) [user] subst_vars('superpose-bind', _88566, [], _89506)
   Call: (260) [system] atom('superpose-bind')
   Exit: (260) [system] atom('superpose-bind')
^  Call: (260) [user] symbol_concat($, _96024, 'superpose-bind')
^  Unify: (260) [user] symbol_concat($, _96024, 'superpose-bind')
   Call: (261) [system] atom_concat($, _96024, 'superpose-bind')
   Fail: (261) [system] atom_concat($, _96024, 'superpose-bind')
^  Fail: (260) [user] symbol_concat($, _96024, 'superpose-bind')
^  Redo: (259) [user] subst_vars('superpose-bind', _88566, [], _89506)
^  Unify: (259) [user] subst_vars('superpose-bind', _88566, [], _89506)
   Call: (260) [system] compound('superpose-bind')
^  Redo: (259) [user] subst_vars('superpose-bind', _88566, [], _89506)
^  Unify: (259) [user] subst_vars('superpose-bind', 'superpose-bind', [], [])
^  Exit: (259) [user] subst_vars('superpose-bind', 'superpose-bind', [], [])
^  Call: (259) [user] subst_vars([[->, 'Atom', 'Atom']], _88568, [], _63372)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Atom']], [[->, 'Atom', 'Atom']], [], [])
   Call: (260) [system] var([[->, 'Atom', 'Atom']])
^  Redo: (259) [user] subst_vars([[->, 'Atom', 'Atom']], _88568, [], _63372)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Atom']], [_110024|_110026], [], _63372)
^  Call: (260) [user] subst_vars([->, 'Atom', 'Atom'], _110024, [], _110964)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'], [], [])
   Call: (261) [system] var([->, 'Atom', 'Atom'])
^  Redo: (260) [user] subst_vars([->, 'Atom', 'Atom'], _110024, [], _110964)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Atom'], [_114700|_114702], [], _110964)
^  Call: (261) [user] subst_vars(->, _114700, [], _115640)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
   Call: (262) [system] var(->)
^  Redo: (261) [user] subst_vars(->, _114700, [], _115640)
^  Unify: (261) [user] subst_vars(->, _114700, [], _115640)
   Call: (262) [system] atom(->)
   Exit: (262) [system] atom(->)
^  Call: (262) [user] symbol_concat($, _122158, ->)
^  Unify: (262) [user] symbol_concat($, _122158, ->)
   Call: (263) [system] atom_concat($, _122158, ->)
   Fail: (263) [system] atom_concat($, _122158, ->)
^  Fail: (262) [user] symbol_concat($, _122158, ->)
^  Redo: (261) [user] subst_vars(->, _114700, [], _115640)
^  Unify: (261) [user] subst_vars(->, _114700, [], _115640)
   Call: (262) [system] compound(->)
^  Redo: (261) [user] subst_vars(->, _114700, [], _115640)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
^  Exit: (261) [user] subst_vars(->, ->, [], [])
^  Call: (261) [user] subst_vars(['Atom', 'Atom'], _114702, [], _110964)
^  Unify: (261) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
   Call: (262) [system] var(['Atom', 'Atom'])
^  Redo: (261) [user] subst_vars(['Atom', 'Atom'], _114702, [], _110964)
^  Unify: (261) [user] subst_vars(['Atom', 'Atom'], [_136158|_136160], [], _110964)
^  Call: (262) [user] subst_vars('Atom', _136158, [], _137098)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (263) [system] var('Atom')
^  Redo: (262) [user] subst_vars('Atom', _136158, [], _137098)
^  Unify: (262) [user] subst_vars('Atom', _136158, [], _137098)
   Call: (263) [system] atom('Atom')
   Exit: (263) [system] atom('Atom')
^  Call: (263) [user] symbol_concat($, _143616, 'Atom')
^  Unify: (263) [user] symbol_concat($, _143616, 'Atom')
   Call: (264) [system] atom_concat($, _143616, 'Atom')
   Fail: (264) [system] atom_concat($, _143616, 'Atom')
^  Fail: (263) [user] symbol_concat($, _143616, 'Atom')
^  Redo: (262) [user] subst_vars('Atom', _136158, [], _137098)
^  Unify: (262) [user] subst_vars('Atom', _136158, [], _137098)
   Call: (263) [system] compound('Atom')
^  Redo: (262) [user] subst_vars('Atom', _136158, [], _137098)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (262) [user] subst_vars(['Atom'], _136160, [], _110964)
^  Unify: (262) [user] subst_vars(['Atom'], ['Atom'], [], [])
   Call: (263) [system] var(['Atom'])
^  Redo: (262) [user] subst_vars(['Atom'], _136160, [], _110964)
^  Unify: (262) [user] subst_vars(['Atom'], [_157616|_157618], [], _110964)
^  Call: (263) [user] subst_vars('Atom', _157616, [], _158556)
^  Unify: (263) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (264) [system] var('Atom')
^  Redo: (263) [user] subst_vars('Atom', _157616, [], _158556)
^  Unify: (263) [user] subst_vars('Atom', _157616, [], _158556)
   Call: (264) [system] atom('Atom')
   Exit: (264) [system] atom('Atom')
^  Call: (264) [user] symbol_concat($, _165074, 'Atom')
^  Unify: (264) [user] symbol_concat($, _165074, 'Atom')
   Call: (265) [system] atom_concat($, _165074, 'Atom')
   Fail: (265) [system] atom_concat($, _165074, 'Atom')
^  Fail: (264) [user] symbol_concat($, _165074, 'Atom')
^  Redo: (263) [user] subst_vars('Atom', _157616, [], _158556)
^  Unify: (263) [user] subst_vars('Atom', _157616, [], _158556)
   Call: (264) [system] compound('Atom')
^  Redo: (263) [user] subst_vars('Atom', _157616, [], _158556)
^  Unify: (263) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (263) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (263) [user] subst_vars([], _157618, [], _110964)
^  Unify: (263) [user] subst_vars([], [], [], [])
   Call: (264) [system] var([])
^  Redo: (263) [user] subst_vars([], _157618, [], _110964)
^  Unify: (263) [user] subst_vars([], [], [], [])
^  Exit: (263) [user] subst_vars([], [], [], [])
^  Exit: (262) [user] subst_vars(['Atom'], ['Atom'], [], [])
^  Exit: (261) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
^  Exit: (260) [user] subst_vars([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'], [], [])
^  Call: (260) [user] subst_vars([], _110026, [], _63372)
^  Unify: (260) [user] subst_vars([], [], [], [])
   Call: (261) [system] var([])
^  Redo: (260) [user] subst_vars([], _110026, [], _63372)
^  Unify: (260) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([], [], [], [])
^  Exit: (259) [user] subst_vars([[->, 'Atom', 'Atom']], [[->, 'Atom', 'Atom']], [], [])
^  Exit: (258) [user] subst_vars(['superpose-bind', [->, 'Atom', 'Atom']], ['superpose-bind', [->, 'Atom', 'Atom']], [], [])
^  Exit: (257) [user] subst_vars([:, 'superpose-bind', [->, 'Atom', 'Atom']], [:, 'superpose-bind', [->, 'Atom', 'Atom']], [], [])
   Call: (257) [system] _192164=metta_file_buffer(+, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(325, 12, 32, 325))
   Exit: (257) [system] metta_file_buffer(+, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(325, 12, 32, 325))=metta_file_buffer(+, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(325, 12, 32, 325))
^  Call: (257) [user] assertz(metta_file_buffer(+, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(325, 12, 32, 325)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(325, 12, 32, 325)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(325, 12, 32, 325))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(325, 12, 32, 325))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(325, 12, 32, 325))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'superpose-bind', [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(325, 12, 32, 325))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
   Redo: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _242958)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _243896))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _243896)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 359)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _242958)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _242958)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_242958))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_242958))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_242958))
   Exit: (259) [system] nonvar(position(_242958))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(359, 13, 33, 359)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(359, 13, 33, 359))
   Call: (257) [user] current_read_mode(file, _263376)
   Unify: (257) [user] current_read_mode(file, _263376)
   Call: (258) [system] nb_current(file_mode, _263376)
   Redo: (257) [user] current_read_mode(file, _263376)
   Call: (258) [system] _263376=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _269826)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _269826)
^  Call: (258) [user] clause(t_l:s_reader_info(_269826), _271772, _271694)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _269826)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _269826)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _269826)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _269826)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _269826)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _269826)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _269826)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _269826)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _285602)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (260) [system] char_type('\n', space)
   Exit: (260) [system] char_type('\n', space)
   Call: (260) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (260) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _269826)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _269826)
   Call: (261) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _269826)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _269826)
   Call: (261) [system] peek_char((0x55aefe44e2f0), _295808)
   Exit: (261) [system] peek_char((0x55aefe44e2f0), ;)
   Call: (261) [system] char_type(;, space)
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _269826)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _269826)
^  Call: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (262) [system] string((0x55aefe44e2f0))
^  Redo: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _269826)
^  Unify: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _269826)
^  Call: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _269826)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _269826)
   Call: (263) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _269826)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _269826)
   Call: (263) [system] peek_char((0x55aefe44e2f0), _311562)
   Exit: (263) [system] peek_char((0x55aefe44e2f0), ;)
   Call: (263) [system] char_type(;, space)
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _269826)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _269826)
   Call: (263) [system] _316204=(0x55aefe44e2f0)
   Exit: (263) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (263) [user] once((read_position((0x55aefe44e2f0), _318072, _318074, _318076, _318078), read_sexpr((0x55aefe44e2f0), _318090), assertz(metta_file_comment(_318072, _318074, _318076, _318090, _318078))))
^  Unify: (263) [system] once(user:(read_position((0x55aefe44e2f0), _318072, _318074, _318076, _318078), read_sexpr((0x55aefe44e2f0), _318090), assertz(metta_file_comment(_318072, _318074, _318076, _318090, _318078))))
^  Call: (265) [user] read_position((0x55aefe44e2f0), _318072, _318074, _318076, _318078)
^  Unify: (265) [user] read_position((0x55aefe44e2f0), _318072, _318074, _318076, _318078)
   Call: (266) [system] stream_property((0x55aefe44e2f0), position(_318078))
   Unify: (266) [system] stream_property((0x55aefe44e2f0), position(_318078))
   Call: (267) [system] nonvar((0x55aefe44e2f0))
   Exit: (267) [system] nonvar((0x55aefe44e2f0))
   Call: (267) [system] nonvar(position(_318078))
   Exit: (267) [system] nonvar(position(_318078))
   Exit: (266) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(360, 14, 0, 360)))
   Call: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(360, 14, 0, 360), _318072)
   Unify: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(360, 14, 0, 360), _318072)
   Call: (267) [system] nonvar(line_count)
   Exit: (267) [system] nonvar(line_count)
   Call: (267) [$syspreds] stream_position_field(line_count, _332060)
   Unify: (267) [$syspreds] stream_position_field(line_count, 2)
   Exit: (267) [$syspreds] stream_position_field(line_count, 2)
   Call: (267) [system] arg(2, '$stream_position'(360, 14, 0, 360), _318072)
   Exit: (267) [system] arg(2, '$stream_position'(360, 14, 0, 360), 14)
   Exit: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(360, 14, 0, 360), 14)
   Call: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(360, 14, 0, 360), _318074)
   Unify: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(360, 14, 0, 360), _318074)
   Call: (267) [system] nonvar(line_position)
   Exit: (267) [system] nonvar(line_position)
   Call: (267) [$syspreds] stream_position_field(line_position, _341354)
   Unify: (267) [$syspreds] stream_position_field(line_position, 3)
   Exit: (267) [$syspreds] stream_position_field(line_position, 3)
   Call: (267) [system] arg(3, '$stream_position'(360, 14, 0, 360), _318074)
   Exit: (267) [system] arg(3, '$stream_position'(360, 14, 0, 360), 0)
   Exit: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(360, 14, 0, 360), 0)
   Call: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(360, 14, 0, 360), _318076)
   Unify: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(360, 14, 0, 360), _318076)
   Call: (267) [system] nonvar(char_count)
   Exit: (267) [system] nonvar(char_count)
   Call: (267) [$syspreds] stream_position_field(char_count, _350648)
   Unify: (267) [$syspreds] stream_position_field(char_count, 1)
   Exit: (267) [$syspreds] stream_position_field(char_count, 1)
   Call: (267) [system] arg(1, '$stream_position'(360, 14, 0, 360), _318076)
   Exit: (267) [system] arg(1, '$stream_position'(360, 14, 0, 360), 360)
   Exit: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(360, 14, 0, 360), 360)
^  Exit: (265) [user] read_position((0x55aefe44e2f0), 14, 0, 360, '$stream_position'(360, 14, 0, 360))
^  Call: (265) [user] read_sexpr((0x55aefe44e2f0), _318090)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _318090)
   Call: (266) [system] string((0x55aefe44e2f0))
^  Redo: (265) [user] read_sexpr((0x55aefe44e2f0), _318090)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _318090)
^  Call: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _318090)
^  Unify: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _318090)
^  Call: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _365518)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), ;)
   Call: (268) [system] (;)=(;)
   Exit: (268) [system] (;)=(;)
^  Call: (268) [user] read_comment((0x55aefe44e2f0))
^  Unify: (268) [user] read_comment((0x55aefe44e2f0))
^  Call: (269) [user] read_position((0x55aefe44e2f0), _371080, _371082, _371084, _371086)
^  Unify: (269) [user] read_position((0x55aefe44e2f0), _371080, _371082, _371084, _371086)
   Call: (270) [system] stream_property((0x55aefe44e2f0), position(_371086))
   Unify: (270) [system] stream_property((0x55aefe44e2f0), position(_371086))
   Call: (271) [system] nonvar((0x55aefe44e2f0))
   Exit: (271) [system] nonvar((0x55aefe44e2f0))
   Call: (271) [system] nonvar(position(_371086))
   Exit: (271) [system] nonvar(position(_371086))
   Exit: (270) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(360, 14, 0, 360)))
   Call: (270) [$syspreds] stream_position_data(line_count, '$stream_position'(360, 14, 0, 360), _371080)
   Unify: (270) [$syspreds] stream_position_data(line_count, '$stream_position'(360, 14, 0, 360), _371080)
   Call: (271) [system] nonvar(line_count)
   Exit: (271) [system] nonvar(line_count)
   Call: (271) [$syspreds] stream_position_field(line_count, _383174)
   Unify: (271) [$syspreds] stream_position_field(line_count, 2)
   Exit: (271) [$syspreds] stream_position_field(line_count, 2)
   Call: (271) [system] arg(2, '$stream_position'(360, 14, 0, 360), _371080)
   Exit: (271) [system] arg(2, '$stream_position'(360, 14, 0, 360), 14)
   Exit: (270) [$syspreds] stream_position_data(line_count, '$stream_position'(360, 14, 0, 360), 14)
   Call: (270) [$syspreds] stream_position_data(line_position, '$stream_position'(360, 14, 0, 360), _371082)
   Unify: (270) [$syspreds] stream_position_data(line_position, '$stream_position'(360, 14, 0, 360), _371082)
   Call: (271) [system] nonvar(line_position)
   Exit: (271) [system] nonvar(line_position)
   Call: (271) [$syspreds] stream_position_field(line_position, _392468)
   Unify: (271) [$syspreds] stream_position_field(line_position, 3)
   Exit: (271) [$syspreds] stream_position_field(line_position, 3)
   Call: (271) [system] arg(3, '$stream_position'(360, 14, 0, 360), _371082)
   Exit: (271) [system] arg(3, '$stream_position'(360, 14, 0, 360), 0)
   Exit: (270) [$syspreds] stream_position_data(line_position, '$stream_position'(360, 14, 0, 360), 0)
   Call: (270) [$syspreds] stream_position_data(char_count, '$stream_position'(360, 14, 0, 360), _371084)
   Unify: (270) [$syspreds] stream_position_data(char_count, '$stream_position'(360, 14, 0, 360), _371084)
   Call: (271) [system] nonvar(char_count)
   Exit: (271) [system] nonvar(char_count)
   Call: (271) [$syspreds] stream_position_field(char_count, _401762)
   Unify: (271) [$syspreds] stream_position_field(char_count, 1)
   Exit: (271) [$syspreds] stream_position_field(char_count, 1)
   Call: (271) [system] arg(1, '$stream_position'(360, 14, 0, 360), _371084)
   Exit: (271) [system] arg(1, '$stream_position'(360, 14, 0, 360), 360)
   Exit: (270) [$syspreds] stream_position_data(char_count, '$stream_position'(360, 14, 0, 360), 360)
^  Exit: (269) [user] read_position((0x55aefe44e2f0), 14, 0, 360, '$stream_position'(360, 14, 0, 360))
^  Call: (269) [user] read_until_eol((0x55aefe44e2f0), _408284)
^  Unify: (269) [user] read_until_eol((0x55aefe44e2f0), _408284)
   Call: (270) [system] get_char((0x55aefe44e2f0), _410142)
   Exit: (270) [system] get_char((0x55aefe44e2f0), ;)
   Call: (270) [system] char_type(;, end_of_line)
^  Redo: (269) [user] read_until_eol((0x55aefe44e2f0), _408284)
   Call: (270) [system] (;)=end_of_file
^  Redo: (269) [user] read_until_eol((0x55aefe44e2f0), _408284)
^  Call: (270) [user] read_until_eol((0x55aefe44e2f0), _415712)
^  Unify: (270) [user] read_until_eol((0x55aefe44e2f0), _415712)
   Call: (271) [system] get_char((0x55aefe44e2f0), _417570)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ' ')
   Call: (271) [system] char_type(' ', end_of_line)
^  Redo: (270) [user] read_until_eol((0x55aefe44e2f0), _415712)
   Call: (271) [system] ' '=end_of_file
^  Redo: (270) [user] read_until_eol((0x55aefe44e2f0), _415712)
^  Call: (271) [user] read_until_eol((0x55aefe44e2f0), _423140)
^  Unify: (271) [user] read_until_eol((0x55aefe44e2f0), _423140)
   Call: (272) [system] get_char((0x55aefe44e2f0), _424998)
   Exit: (272) [system] get_char((0x55aefe44e2f0), 'W')
   Call: (272) [system] char_type('W', end_of_line)
^  Redo: (271) [user] read_until_eol((0x55aefe44e2f0), _423140)
   Call: (272) [system] 'W'=end_of_file
^  Redo: (271) [user] read_until_eol((0x55aefe44e2f0), _423140)
^  Call: (272) [user] read_until_eol((0x55aefe44e2f0), _430568)
^  Unify: (272) [user] read_until_eol((0x55aefe44e2f0), _430568)
   Call: (273) [system] get_char((0x55aefe44e2f0), _432426)
   Exit: (273) [system] get_char((0x55aefe44e2f0), e)
   Call: (273) [system] char_type(e, end_of_line)
^  Redo: (272) [user] read_until_eol((0x55aefe44e2f0), _430568)
   Call: (273) [system] e=end_of_file
^  Redo: (272) [user] read_until_eol((0x55aefe44e2f0), _430568)
^  Call: (273) [user] read_until_eol((0x55aefe44e2f0), _437996)
^  Unify: (273) [user] read_until_eol((0x55aefe44e2f0), _437996)
   Call: (274) [system] get_char((0x55aefe44e2f0), _439854)
   Exit: (274) [system] get_char((0x55aefe44e2f0), ' ')
   Call: (274) [system] char_type(' ', end_of_line)
^  Redo: (273) [user] read_until_eol((0x55aefe44e2f0), _437996)
   Call: (274) [system] ' '=end_of_file
^  Redo: (273) [user] read_until_eol((0x55aefe44e2f0), _437996)
^  Call: (274) [user] read_until_eol((0x55aefe44e2f0), _445424)
^  Unify: (274) [user] read_until_eol((0x55aefe44e2f0), _445424)
   Call: (275) [system] get_char((0x55aefe44e2f0), _447282)
   Exit: (275) [system] get_char((0x55aefe44e2f0), s)
   Call: (275) [system] char_type(s, end_of_line)
^  Redo: (274) [user] read_until_eol((0x55aefe44e2f0), _445424)
   Call: (275) [system] s=end_of_file
^  Redo: (274) [user] read_until_eol((0x55aefe44e2f0), _445424)
^  Call: (275) [user] read_until_eol((0x55aefe44e2f0), _452852)
^  Unify: (275) [user] read_until_eol((0x55aefe44e2f0), _452852)
   Call: (276) [system] get_char((0x55aefe44e2f0), _454710)
   Exit: (276) [system] get_char((0x55aefe44e2f0), p)
   Call: (276) [system] char_type(p, end_of_line)
^  Redo: (275) [user] read_until_eol((0x55aefe44e2f0), _452852)
   Call: (276) [system] p=end_of_file
^  Redo: (275) [user] read_until_eol((0x55aefe44e2f0), _452852)
^  Call: (276) [user] read_until_eol((0x55aefe44e2f0), _460280)
^  Unify: (276) [user] read_until_eol((0x55aefe44e2f0), _460280)
   Call: (277) [system] get_char((0x55aefe44e2f0), _462138)
   Exit: (277) [system] get_char((0x55aefe44e2f0), e)
   Call: (277) [system] char_type(e, end_of_line)
^  Redo: (276) [user] read_until_eol((0x55aefe44e2f0), _460280)
   Call: (277) [system] e=end_of_file
^  Redo: (276) [user] read_until_eol((0x55aefe44e2f0), _460280)
^  Call: (277) [user] read_until_eol((0x55aefe44e2f0), _467708)
^  Unify: (277) [user] read_until_eol((0x55aefe44e2f0), _467708)
   Call: (278) [system] get_char((0x55aefe44e2f0), _469566)
   Exit: (278) [system] get_char((0x55aefe44e2f0), c)
   Call: (278) [system] char_type(c, end_of_line)
^  Redo: (277) [user] read_until_eol((0x55aefe44e2f0), _467708)
   Call: (278) [system] c=end_of_file
^  Redo: (277) [user] read_until_eol((0x55aefe44e2f0), _467708)
^  Call: (278) [user] read_until_eol((0x55aefe44e2f0), _475136)
^  Unify: (278) [user] read_until_eol((0x55aefe44e2f0), _475136)
   Call: (279) [system] get_char((0x55aefe44e2f0), _476994)
   Exit: (279) [system] get_char((0x55aefe44e2f0), i)
   Call: (279) [system] char_type(i, end_of_line)
^  Redo: (278) [user] read_until_eol((0x55aefe44e2f0), _475136)
   Call: (279) [system] i=end_of_file
^  Redo: (278) [user] read_until_eol((0x55aefe44e2f0), _475136)
^  Call: (279) [user] read_until_eol((0x55aefe44e2f0), _482564)
^  Unify: (279) [user] read_until_eol((0x55aefe44e2f0), _482564)
   Call: (280) [system] get_char((0x55aefe44e2f0), _484422)
   Exit: (280) [system] get_char((0x55aefe44e2f0), a)
   Call: (280) [system] char_type(a, end_of_line)
^  Redo: (279) [user] read_until_eol((0x55aefe44e2f0), _482564)
   Call: (280) [system] a=end_of_file
^  Redo: (279) [user] read_until_eol((0x55aefe44e2f0), _482564)
^  Call: (280) [user] read_until_eol((0x55aefe44e2f0), _489992)
^  Unify: (280) [user] read_until_eol((0x55aefe44e2f0), _489992)
   Call: (281) [system] get_char((0x55aefe44e2f0), _491850)
   Exit: (281) [system] get_char((0x55aefe44e2f0), l)
   Call: (281) [system] char_type(l, end_of_line)
^  Redo: (280) [user] read_until_eol((0x55aefe44e2f0), _489992)
   Call: (281) [system] l=end_of_file
^  Redo: (280) [user] read_until_eol((0x55aefe44e2f0), _489992)
^  Call: (281) [user] read_until_eol((0x55aefe44e2f0), _497420)
^  Unify: (281) [user] read_until_eol((0x55aefe44e2f0), _497420)
   Call: (282) [system] get_char((0x55aefe44e2f0), _499278)
   Exit: (282) [system] get_char((0x55aefe44e2f0), i)
   Call: (282) [system] char_type(i, end_of_line)
^  Redo: (281) [user] read_until_eol((0x55aefe44e2f0), _497420)
   Call: (282) [system] i=end_of_file
^  Redo: (281) [user] read_until_eol((0x55aefe44e2f0), _497420)
^  Call: (282) [user] read_until_eol((0x55aefe44e2f0), _504848)
^  Unify: (282) [user] read_until_eol((0x55aefe44e2f0), _504848)
   Call: (283) [system] get_char((0x55aefe44e2f0), _506706)
   Exit: (283) [system] get_char((0x55aefe44e2f0), z)
   Call: (283) [system] char_type(z, end_of_line)
^  Redo: (282) [user] read_until_eol((0x55aefe44e2f0), _504848)
   Call: (283) [system] z=end_of_file
^  Redo: (282) [user] read_until_eol((0x55aefe44e2f0), _504848)
^  Call: (283) [user] read_until_eol((0x55aefe44e2f0), _512276)
^  Unify: (283) [user] read_until_eol((0x55aefe44e2f0), _512276)
   Call: (284) [system] get_char((0x55aefe44e2f0), _514134)
   Exit: (284) [system] get_char((0x55aefe44e2f0), e)
   Call: (284) [system] char_type(e, end_of_line)
^  Redo: (283) [user] read_until_eol((0x55aefe44e2f0), _512276)
   Call: (284) [system] e=end_of_file
^  Redo: (283) [user] read_until_eol((0x55aefe44e2f0), _512276)
^  Call: (284) [user] read_until_eol((0x55aefe44e2f0), _519704)
^  Unify: (284) [user] read_until_eol((0x55aefe44e2f0), _519704)
   Call: (285) [system] get_char((0x55aefe44e2f0), _521562)
   Exit: (285) [system] get_char((0x55aefe44e2f0), ' ')
   Call: (285) [system] char_type(' ', end_of_line)
^  Redo: (284) [user] read_until_eol((0x55aefe44e2f0), _6056)
   Call: (285) [system] ' '=end_of_file
^  Redo: (284) [user] read_until_eol((0x55aefe44e2f0), _6056)
^  Call: (285) [user] read_until_eol((0x55aefe44e2f0), _9272)
^  Unify: (285) [user] read_until_eol((0x55aefe44e2f0), _9272)
   Call: (286) [system] get_char((0x55aefe44e2f0), _11130)
   Exit: (286) [system] get_char((0x55aefe44e2f0), t)
   Call: (286) [system] char_type(t, end_of_line)
^  Redo: (285) [user] read_until_eol((0x55aefe44e2f0), _9272)
   Call: (286) [system] t=end_of_file
^  Redo: (285) [user] read_until_eol((0x55aefe44e2f0), _9272)
^  Call: (286) [user] read_until_eol((0x55aefe44e2f0), _16700)
^  Unify: (286) [user] read_until_eol((0x55aefe44e2f0), _16700)
   Call: (287) [system] get_char((0x55aefe44e2f0), _18558)
   Exit: (287) [system] get_char((0x55aefe44e2f0), h)
   Call: (287) [system] char_type(h, end_of_line)
^  Redo: (286) [user] read_until_eol((0x55aefe44e2f0), _16700)
   Call: (287) [system] h=end_of_file
^  Redo: (286) [user] read_until_eol((0x55aefe44e2f0), _16700)
^  Call: (287) [user] read_until_eol((0x55aefe44e2f0), _24128)
^  Unify: (287) [user] read_until_eol((0x55aefe44e2f0), _24128)
   Call: (288) [system] get_char((0x55aefe44e2f0), _25986)
   Exit: (288) [system] get_char((0x55aefe44e2f0), e)
   Call: (288) [system] char_type(e, end_of_line)
^  Redo: (287) [user] read_until_eol((0x55aefe44e2f0), _24128)
   Call: (288) [system] e=end_of_file
^  Redo: (287) [user] read_until_eol((0x55aefe44e2f0), _24128)
^  Call: (288) [user] read_until_eol((0x55aefe44e2f0), _31556)
^  Unify: (288) [user] read_until_eol((0x55aefe44e2f0), _31556)
   Call: (289) [system] get_char((0x55aefe44e2f0), _33414)
   Exit: (289) [system] get_char((0x55aefe44e2f0), m)
   Call: (289) [system] char_type(m, end_of_line)
^  Redo: (288) [user] read_until_eol((0x55aefe44e2f0), _31556)
   Call: (289) [system] m=end_of_file
^  Redo: (288) [user] read_until_eol((0x55aefe44e2f0), _31556)
^  Call: (289) [user] read_until_eol((0x55aefe44e2f0), _38984)
^  Unify: (289) [user] read_until_eol((0x55aefe44e2f0), _38984)
   Call: (290) [system] get_char((0x55aefe44e2f0), _40842)
   Exit: (290) [system] get_char((0x55aefe44e2f0), ' ')
   Call: (290) [system] char_type(' ', end_of_line)
^  Redo: (289) [user] read_until_eol((0x55aefe44e2f0), _38984)
   Call: (290) [system] ' '=end_of_file
^  Redo: (289) [user] read_until_eol((0x55aefe44e2f0), _38984)
^  Call: (290) [user] read_until_eol((0x55aefe44e2f0), _46412)
^  Unify: (290) [user] read_until_eol((0x55aefe44e2f0), _46412)
   Call: (291) [system] get_char((0x55aefe44e2f0), _48270)
   Exit: (291) [system] get_char((0x55aefe44e2f0), b)
   Call: (291) [system] char_type(b, end_of_line)
^  Redo: (290) [user] read_until_eol((0x55aefe44e2f0), _46412)
   Call: (291) [system] b=end_of_file
^  Redo: (290) [user] read_until_eol((0x55aefe44e2f0), _46412)
^  Call: (291) [user] read_until_eol((0x55aefe44e2f0), _53840)
^  Unify: (291) [user] read_until_eol((0x55aefe44e2f0), _53840)
   Call: (292) [system] get_char((0x55aefe44e2f0), _55698)
   Exit: (292) [system] get_char((0x55aefe44e2f0), u)
   Call: (292) [system] char_type(u, end_of_line)
^  Redo: (291) [user] read_until_eol((0x55aefe44e2f0), _53840)
   Call: (292) [system] u=end_of_file
^  Redo: (291) [user] read_until_eol((0x55aefe44e2f0), _53840)
^  Call: (292) [user] read_until_eol((0x55aefe44e2f0), _61268)
^  Unify: (292) [user] read_until_eol((0x55aefe44e2f0), _61268)
   Call: (293) [system] get_char((0x55aefe44e2f0), _63126)
   Exit: (293) [system] get_char((0x55aefe44e2f0), t)
   Call: (293) [system] char_type(t, end_of_line)
^  Redo: (292) [user] read_until_eol((0x55aefe44e2f0), _61268)
   Call: (293) [system] t=end_of_file
^  Redo: (292) [user] read_until_eol((0x55aefe44e2f0), _61268)
^  Call: (293) [user] read_until_eol((0x55aefe44e2f0), _68696)
^  Unify: (293) [user] read_until_eol((0x55aefe44e2f0), _68696)
   Call: (294) [system] get_char((0x55aefe44e2f0), _70554)
   Exit: (294) [system] get_char((0x55aefe44e2f0), ' ')
   Call: (294) [system] char_type(' ', end_of_line)
^  Redo: (293) [user] read_until_eol((0x55aefe44e2f0), _68696)
   Call: (294) [system] ' '=end_of_file
^  Redo: (293) [user] read_until_eol((0x55aefe44e2f0), _68696)
^  Call: (294) [user] read_until_eol((0x55aefe44e2f0), _76124)
^  Unify: (294) [user] read_until_eol((0x55aefe44e2f0), _76124)
   Call: (295) [system] get_char((0x55aefe44e2f0), _77982)
   Exit: (295) [system] get_char((0x55aefe44e2f0), l)
   Call: (295) [system] char_type(l, end_of_line)
^  Redo: (294) [user] read_until_eol((0x55aefe44e2f0), _76124)
   Call: (295) [system] l=end_of_file
^  Redo: (294) [user] read_until_eol((0x55aefe44e2f0), _76124)
^  Call: (295) [user] read_until_eol((0x55aefe44e2f0), _83552)
^  Unify: (295) [user] read_until_eol((0x55aefe44e2f0), _83552)
   Call: (296) [system] get_char((0x55aefe44e2f0), _85410)
   Exit: (296) [system] get_char((0x55aefe44e2f0), e)
   Call: (296) [system] char_type(e, end_of_line)
^  Redo: (295) [user] read_until_eol((0x55aefe44e2f0), _83552)
   Call: (296) [system] e=end_of_file
^  Redo: (295) [user] read_until_eol((0x55aefe44e2f0), _83552)
^  Call: (296) [user] read_until_eol((0x55aefe44e2f0), _90980)
^  Unify: (296) [user] read_until_eol((0x55aefe44e2f0), _90980)
   Call: (297) [system] get_char((0x55aefe44e2f0), _92838)
   Exit: (297) [system] get_char((0x55aefe44e2f0), a)
   Call: (297) [system] char_type(a, end_of_line)
^  Redo: (296) [user] read_until_eol((0x55aefe44e2f0), _90980)
   Call: (297) [system] a=end_of_file
^  Redo: (296) [user] read_until_eol((0x55aefe44e2f0), _90980)
^  Call: (297) [user] read_until_eol((0x55aefe44e2f0), _98408)
^  Unify: (297) [user] read_until_eol((0x55aefe44e2f0), _98408)
   Call: (298) [system] get_char((0x55aefe44e2f0), _100266)
   Exit: (298) [system] get_char((0x55aefe44e2f0), v)
   Call: (298) [system] char_type(v, end_of_line)
^  Redo: (297) [user] read_until_eol((0x55aefe44e2f0), _98408)
   Call: (298) [system] v=end_of_file
^  Redo: (297) [user] read_until_eol((0x55aefe44e2f0), _98408)
^  Call: (298) [user] read_until_eol((0x55aefe44e2f0), _105836)
^  Unify: (298) [user] read_until_eol((0x55aefe44e2f0), _105836)
   Call: (299) [system] get_char((0x55aefe44e2f0), _107694)
   Exit: (299) [system] get_char((0x55aefe44e2f0), i)
   Call: (299) [system] char_type(i, end_of_line)
^  Redo: (298) [user] read_until_eol((0x55aefe44e2f0), _105836)
   Call: (299) [system] i=end_of_file
^  Redo: (298) [user] read_until_eol((0x55aefe44e2f0), _105836)
^  Call: (299) [user] read_until_eol((0x55aefe44e2f0), _113264)
^  Unify: (299) [user] read_until_eol((0x55aefe44e2f0), _113264)
   Call: (300) [system] get_char((0x55aefe44e2f0), _115122)
   Exit: (300) [system] get_char((0x55aefe44e2f0), n)
   Call: (300) [system] char_type(n, end_of_line)
^  Redo: (299) [user] read_until_eol((0x55aefe44e2f0), _113264)
   Call: (300) [system] n=end_of_file
^  Redo: (299) [user] read_until_eol((0x55aefe44e2f0), _113264)
^  Call: (300) [user] read_until_eol((0x55aefe44e2f0), _120692)
^  Unify: (300) [user] read_until_eol((0x55aefe44e2f0), _120692)
   Call: (301) [system] get_char((0x55aefe44e2f0), _122550)
   Exit: (301) [system] get_char((0x55aefe44e2f0), g)
   Call: (301) [system] char_type(g, end_of_line)
^  Redo: (300) [user] read_until_eol((0x55aefe44e2f0), _120692)
   Call: (301) [system] g=end_of_file
^  Redo: (300) [user] read_until_eol((0x55aefe44e2f0), _120692)
^  Call: (301) [user] read_until_eol((0x55aefe44e2f0), _128120)
^  Unify: (301) [user] read_until_eol((0x55aefe44e2f0), _128120)
   Call: (302) [system] get_char((0x55aefe44e2f0), _129978)
   Exit: (302) [system] get_char((0x55aefe44e2f0), ' ')
   Call: (302) [system] char_type(' ', end_of_line)
^  Redo: (301) [user] read_until_eol((0x55aefe44e2f0), _128120)
   Call: (302) [system] ' '=end_of_file
^  Redo: (301) [user] read_until_eol((0x55aefe44e2f0), _128120)
^  Call: (302) [user] read_until_eol((0x55aefe44e2f0), _135548)
^  Unify: (302) [user] read_until_eol((0x55aefe44e2f0), _135548)
   Call: (303) [system] get_char((0x55aefe44e2f0), _137406)
   Exit: (303) [system] get_char((0x55aefe44e2f0), t)
   Call: (303) [system] char_type(t, end_of_line)
^  Redo: (302) [user] read_until_eol((0x55aefe44e2f0), _135548)
   Call: (303) [system] t=end_of_file
^  Redo: (302) [user] read_until_eol((0x55aefe44e2f0), _135548)
^  Call: (303) [user] read_until_eol((0x55aefe44e2f0), _142976)
^  Unify: (303) [user] read_until_eol((0x55aefe44e2f0), _142976)
   Call: (304) [system] get_char((0x55aefe44e2f0), _144834)
   Exit: (304) [system] get_char((0x55aefe44e2f0), h)
   Call: (304) [system] char_type(h, end_of_line)
^  Redo: (303) [user] read_until_eol((0x55aefe44e2f0), _142976)
   Call: (304) [system] h=end_of_file
^  Redo: (303) [user] read_until_eol((0x55aefe44e2f0), _142976)
^  Call: (304) [user] read_until_eol((0x55aefe44e2f0), _150404)
^  Unify: (304) [user] read_until_eol((0x55aefe44e2f0), _150404)
   Call: (305) [system] get_char((0x55aefe44e2f0), _152262)
   Exit: (305) [system] get_char((0x55aefe44e2f0), e)
   Call: (305) [system] char_type(e, end_of_line)
^  Redo: (304) [user] read_until_eol((0x55aefe44e2f0), _150404)
   Call: (305) [system] e=end_of_file
^  Redo: (304) [user] read_until_eol((0x55aefe44e2f0), _150404)
^  Call: (305) [user] read_until_eol((0x55aefe44e2f0), _157832)
^  Unify: (305) [user] read_until_eol((0x55aefe44e2f0), _157832)
   Call: (306) [system] get_char((0x55aefe44e2f0), _159690)
   Exit: (306) [system] get_char((0x55aefe44e2f0), ' ')
   Call: (306) [system] char_type(' ', end_of_line)
^  Redo: (305) [user] read_until_eol((0x55aefe44e2f0), _157832)
   Call: (306) [system] ' '=end_of_file
^  Redo: (305) [user] read_until_eol((0x55aefe44e2f0), _157832)
^  Call: (306) [user] read_until_eol((0x55aefe44e2f0), _165260)
^  Unify: (306) [user] read_until_eol((0x55aefe44e2f0), _165260)
   Call: (307) [system] get_char((0x55aefe44e2f0), _167118)
   Exit: (307) [system] get_char((0x55aefe44e2f0), o)
   Call: (307) [system] char_type(o, end_of_line)
^  Redo: (306) [user] read_until_eol((0x55aefe44e2f0), _165260)
   Call: (307) [system] o=end_of_file
^  Redo: (306) [user] read_until_eol((0x55aefe44e2f0), _165260)
^  Call: (307) [user] read_until_eol((0x55aefe44e2f0), _172688)
^  Unify: (307) [user] read_until_eol((0x55aefe44e2f0), _172688)
   Call: (308) [system] get_char((0x55aefe44e2f0), _174546)
   Exit: (308) [system] get_char((0x55aefe44e2f0), l)
   Call: (308) [system] char_type(l, end_of_line)
^  Redo: (307) [user] read_until_eol((0x55aefe44e2f0), _172688)
   Call: (308) [system] l=end_of_file
^  Redo: (307) [user] read_until_eol((0x55aefe44e2f0), _172688)
^  Call: (308) [user] read_until_eol((0x55aefe44e2f0), _180116)
^  Unify: (308) [user] read_until_eol((0x55aefe44e2f0), _180116)
   Call: (309) [system] get_char((0x55aefe44e2f0), _181974)
   Exit: (309) [system] get_char((0x55aefe44e2f0), d)
   Call: (309) [system] char_type(d, end_of_line)
^  Redo: (308) [user] read_until_eol((0x55aefe44e2f0), _180116)
   Call: (309) [system] d=end_of_file
^  Redo: (308) [user] read_until_eol((0x55aefe44e2f0), _180116)
^  Call: (309) [user] read_until_eol((0x55aefe44e2f0), _187544)
^  Unify: (309) [user] read_until_eol((0x55aefe44e2f0), _187544)
   Call: (310) [system] get_char((0x55aefe44e2f0), _189402)
   Exit: (310) [system] get_char((0x55aefe44e2f0), ' ')
   Call: (310) [system] char_type(' ', end_of_line)
^  Redo: (309) [user] read_until_eol((0x55aefe44e2f0), _187544)
   Call: (310) [system] ' '=end_of_file
^  Redo: (309) [user] read_until_eol((0x55aefe44e2f0), _187544)
^  Call: (310) [user] read_until_eol((0x55aefe44e2f0), _194972)
^  Unify: (310) [user] read_until_eol((0x55aefe44e2f0), _194972)
   Call: (311) [system] get_char((0x55aefe44e2f0), _196830)
   Exit: (311) [system] get_char((0x55aefe44e2f0), d)
   Call: (311) [system] char_type(d, end_of_line)
^  Redo: (310) [user] read_until_eol((0x55aefe44e2f0), _194972)
   Call: (311) [system] d=end_of_file
^  Redo: (310) [user] read_until_eol((0x55aefe44e2f0), _194972)
^  Call: (311) [user] read_until_eol((0x55aefe44e2f0), _202400)
^  Unify: (311) [user] read_until_eol((0x55aefe44e2f0), _202400)
   Call: (312) [system] get_char((0x55aefe44e2f0), _204258)
   Exit: (312) [system] get_char((0x55aefe44e2f0), e)
   Call: (312) [system] char_type(e, end_of_line)
^  Redo: (311) [user] read_until_eol((0x55aefe44e2f0), _202400)
   Call: (312) [system] e=end_of_file
^  Redo: (311) [user] read_until_eol((0x55aefe44e2f0), _202400)
^  Call: (312) [user] read_until_eol((0x55aefe44e2f0), _209828)
^  Unify: (312) [user] read_until_eol((0x55aefe44e2f0), _209828)
   Call: (313) [system] get_char((0x55aefe44e2f0), _211686)
   Exit: (313) [system] get_char((0x55aefe44e2f0), f)
   Call: (313) [system] char_type(f, end_of_line)
^  Redo: (312) [user] read_until_eol((0x55aefe44e2f0), _209828)
   Call: (313) [system] f=end_of_file
^  Redo: (312) [user] read_until_eol((0x55aefe44e2f0), _209828)
^  Call: (313) [user] read_until_eol((0x55aefe44e2f0), _217256)
^  Unify: (313) [user] read_until_eol((0x55aefe44e2f0), _217256)
   Call: (314) [system] get_char((0x55aefe44e2f0), _219114)
   Exit: (314) [system] get_char((0x55aefe44e2f0), s)
   Call: (314) [system] char_type(s, end_of_line)
^  Redo: (313) [user] read_until_eol((0x55aefe44e2f0), _217256)
   Call: (314) [system] s=end_of_file
^  Redo: (313) [user] read_until_eol((0x55aefe44e2f0), _217256)
^  Call: (314) [user] read_until_eol((0x55aefe44e2f0), _224684)
^  Unify: (314) [user] read_until_eol((0x55aefe44e2f0), _224684)
   Call: (315) [system] get_char((0x55aefe44e2f0), _226542)
   Exit: (315) [system] get_char((0x55aefe44e2f0), ' ')
   Call: (315) [system] char_type(' ', end_of_line)
^  Redo: (314) [user] read_until_eol((0x55aefe44e2f0), _224684)
   Call: (315) [system] ' '=end_of_file
^  Redo: (314) [user] read_until_eol((0x55aefe44e2f0), _224684)
^  Call: (315) [user] read_until_eol((0x55aefe44e2f0), _232112)
^  Unify: (315) [user] read_until_eol((0x55aefe44e2f0), _232112)
   Call: (316) [system] get_char((0x55aefe44e2f0), _233970)
   Exit: (316) [system] get_char((0x55aefe44e2f0), i)
   Call: (316) [system] char_type(i, end_of_line)
^  Redo: (315) [user] read_until_eol((0x55aefe44e2f0), _232112)
   Call: (316) [system] i=end_of_file
^  Redo: (315) [user] read_until_eol((0x55aefe44e2f0), _232112)
^  Call: (316) [user] read_until_eol((0x55aefe44e2f0), _239540)
^  Unify: (316) [user] read_until_eol((0x55aefe44e2f0), _239540)
   Call: (317) [system] get_char((0x55aefe44e2f0), _241398)
   Exit: (317) [system] get_char((0x55aefe44e2f0), n)
   Call: (317) [system] char_type(n, end_of_line)
^  Redo: (316) [user] read_until_eol((0x55aefe44e2f0), _239540)
   Call: (317) [system] n=end_of_file
^  Redo: (316) [user] read_until_eol((0x55aefe44e2f0), _239540)
^  Call: (317) [user] read_until_eol((0x55aefe44e2f0), _246968)
^  Unify: (317) [user] read_until_eol((0x55aefe44e2f0), _246968)
   Call: (318) [system] get_char((0x55aefe44e2f0), _248826)
   Exit: (318) [system] get_char((0x55aefe44e2f0), ' ')
   Call: (318) [system] char_type(' ', end_of_line)
^  Redo: (317) [user] read_until_eol((0x55aefe44e2f0), _246968)
   Call: (318) [system] ' '=end_of_file
^  Redo: (317) [user] read_until_eol((0x55aefe44e2f0), _246968)
^  Call: (318) [user] read_until_eol((0x55aefe44e2f0), _254396)
^  Unify: (318) [user] read_until_eol((0x55aefe44e2f0), _254396)
   Call: (319) [system] get_char((0x55aefe44e2f0), _256254)
   Exit: (319) [system] get_char((0x55aefe44e2f0), c)
   Call: (319) [system] char_type(c, end_of_line)
^  Redo: (318) [user] read_until_eol((0x55aefe44e2f0), _254396)
   Call: (319) [system] c=end_of_file
^  Redo: (318) [user] read_until_eol((0x55aefe44e2f0), _254396)
^  Call: (319) [user] read_until_eol((0x55aefe44e2f0), _261824)
^  Unify: (319) [user] read_until_eol((0x55aefe44e2f0), _261824)
   Call: (320) [system] get_char((0x55aefe44e2f0), _263682)
   Exit: (320) [system] get_char((0x55aefe44e2f0), a)
   Call: (320) [system] char_type(a, end_of_line)
^  Redo: (319) [user] read_until_eol((0x55aefe44e2f0), _261824)
   Call: (320) [system] a=end_of_file
^  Redo: (319) [user] read_until_eol((0x55aefe44e2f0), _261824)
^  Call: (320) [user] read_until_eol((0x55aefe44e2f0), _269252)
^  Unify: (320) [user] read_until_eol((0x55aefe44e2f0), _269252)
   Call: (321) [system] get_char((0x55aefe44e2f0), _271110)
   Exit: (321) [system] get_char((0x55aefe44e2f0), s)
   Call: (321) [system] char_type(s, end_of_line)
^  Redo: (320) [user] read_until_eol((0x55aefe44e2f0), _269252)
   Call: (321) [system] s=end_of_file
^  Redo: (320) [user] read_until_eol((0x55aefe44e2f0), _269252)
^  Call: (321) [user] read_until_eol((0x55aefe44e2f0), _276680)
^  Unify: (321) [user] read_until_eol((0x55aefe44e2f0), _276680)
   Call: (322) [system] get_char((0x55aefe44e2f0), _278538)
   Exit: (322) [system] get_char((0x55aefe44e2f0), e)
   Call: (322) [system] char_type(e, end_of_line)
^  Redo: (321) [user] read_until_eol((0x55aefe44e2f0), _276680)
   Call: (322) [system] e=end_of_file
^  Redo: (321) [user] read_until_eol((0x55aefe44e2f0), _276680)
^  Call: (322) [user] read_until_eol((0x55aefe44e2f0), _284108)
^  Unify: (322) [user] read_until_eol((0x55aefe44e2f0), _284108)
   Call: (323) [system] get_char((0x55aefe44e2f0), _285966)
   Exit: (323) [system] get_char((0x55aefe44e2f0), '\n')
   Call: (323) [system] char_type('\n', end_of_line)
   Exit: (323) [system] char_type('\n', end_of_line)
   Call: (323) [system] _284108=""
   Exit: (323) [system] ""=""
^  Exit: (322) [user] read_until_eol((0x55aefe44e2f0), "")
   Call: (322) [system] string_concat(e, "", _276680)
   Exit: (322) [system] string_concat(e, "", "e")
^  Exit: (321) [user] read_until_eol((0x55aefe44e2f0), "e")
   Call: (321) [system] string_concat(s, "e", _269252)
   Exit: (321) [system] string_concat(s, "e", "se")
^  Exit: (320) [user] read_until_eol((0x55aefe44e2f0), "se")
   Call: (320) [system] string_concat(a, "se", _261824)
   Exit: (320) [system] string_concat(a, "se", "ase")
^  Exit: (319) [user] read_until_eol((0x55aefe44e2f0), "ase")
   Call: (319) [system] string_concat(c, "ase", _254396)
   Exit: (319) [system] string_concat(c, "ase", "case")
^  Exit: (318) [user] read_until_eol((0x55aefe44e2f0), "case")
   Call: (318) [system] string_concat(' ', "case", _246968)
   Exit: (318) [system] string_concat(' ', "case", " case")
^  Exit: (317) [user] read_until_eol((0x55aefe44e2f0), " case")
   Call: (317) [system] string_concat(n, " case", _239540)
   Exit: (317) [system] string_concat(n, " case", "n case")
^  Exit: (316) [user] read_until_eol((0x55aefe44e2f0), "n case")
   Call: (316) [system] string_concat(i, "n case", _232112)
   Exit: (316) [system] string_concat(i, "n case", "in case")
^  Exit: (315) [user] read_until_eol((0x55aefe44e2f0), "in case")
   Call: (315) [system] string_concat(' ', "in case", _224684)
   Exit: (315) [system] string_concat(' ', "in case", " in case")
^  Exit: (314) [user] read_until_eol((0x55aefe44e2f0), " in case")
   Call: (314) [system] string_concat(s, " in case", _217256)
   Exit: (314) [system] string_concat(s, " in case", "s in case")
^  Exit: (313) [user] read_until_eol((0x55aefe44e2f0), "s in case")
   Call: (313) [system] string_concat(f, "s in case", _209828)
   Exit: (313) [system] string_concat(f, "s in case", "fs in case")
^  Exit: (312) [user] read_until_eol((0x55aefe44e2f0), "fs in case")
   Call: (312) [system] string_concat(e, "fs in case", _202400)
   Exit: (312) [system] string_concat(e, "fs in case", "efs in case")
^  Exit: (311) [user] read_until_eol((0x55aefe44e2f0), "efs in case")
   Call: (311) [system] string_concat(d, "efs in case", _194972)
   Exit: (311) [system] string_concat(d, "efs in case", "defs in case")
^  Exit: (310) [user] read_until_eol((0x55aefe44e2f0), "defs in case")
   Call: (310) [system] string_concat(' ', "defs in case", _187544)
   Exit: (310) [system] string_concat(' ', "defs in case", " defs in case")
^  Exit: (309) [user] read_until_eol((0x55aefe44e2f0), " defs in case")
   Call: (309) [system] string_concat(d, " defs in case", _180116)
   Exit: (309) [system] string_concat(d, " defs in case", "d defs in case")
^  Exit: (308) [user] read_until_eol((0x55aefe44e2f0), "d defs in case")
   Call: (308) [system] string_concat(l, "d defs in case", _172688)
   Exit: (308) [system] string_concat(l, "d defs in case", "ld defs in case")
^  Exit: (307) [user] read_until_eol((0x55aefe44e2f0), "ld defs in case")
   Call: (307) [system] string_concat(o, "ld defs in case", _165260)
   Exit: (307) [system] string_concat(o, "ld defs in case", "old defs in case")
^  Exit: (306) [user] read_until_eol((0x55aefe44e2f0), "old defs in case")
   Call: (306) [system] string_concat(' ', "old defs in case", _157832)
   Exit: (306) [system] string_concat(' ', "old defs in case", " old defs in case")
^  Exit: (305) [user] read_until_eol((0x55aefe44e2f0), " old defs in case")
   Call: (305) [system] string_concat(e, " old defs in case", _150404)
   Exit: (305) [system] string_concat(e, " old defs in case", "e old defs in case")
^  Exit: (304) [user] read_until_eol((0x55aefe44e2f0), "e old defs in case")
   Call: (304) [system] string_concat(h, "e old defs in case", _142976)
   Exit: (304) [system] string_concat(h, "e old defs in case", "he old defs in case")
^  Exit: (303) [user] read_until_eol((0x55aefe44e2f0), "he old defs in case")
   Call: (303) [system] string_concat(t, "he old defs in case", _135548)
   Exit: (303) [system] string_concat(t, "he old defs in case", "the old defs in case")
^  Exit: (302) [user] read_until_eol((0x55aefe44e2f0), "the old defs in case")
   Call: (302) [system] string_concat(' ', "the old defs in case", _128120)
   Exit: (302) [system] string_concat(' ', "the old defs in case", " the old defs in case")
^  Exit: (301) [user] read_until_eol((0x55aefe44e2f0), " the old defs in case")
   Call: (301) [system] string_concat(g, " the old defs in case", _120692)
   Exit: (301) [system] string_concat(g, " the old defs in case", "g the old defs in case")
^  Exit: (300) [user] read_until_eol((0x55aefe44e2f0), "g the old defs in case")
   Call: (300) [system] string_concat(n, "g the old defs in case", _113264)
   Exit: (300) [system] string_concat(n, "g the old defs in case", "ng the old defs in case")
^  Exit: (299) [user] read_until_eol((0x55aefe44e2f0), "ng the old defs in case")
   Call: (299) [system] string_concat(i, "ng the old defs in case", _105836)
   Exit: (299) [system] string_concat(i, "ng the old defs in case", "ing the old defs in case")
^  Exit: (298) [user] read_until_eol((0x55aefe44e2f0), "ing the old defs in case")
   Call: (298) [system] string_concat(v, "ing the old defs in case", _98408)
   Exit: (298) [system] string_concat(v, "ing the old defs in case", "ving the old defs in case")
^  Exit: (297) [user] read_until_eol((0x55aefe44e2f0), "ving the old defs in case")
   Call: (297) [system] string_concat(a, "ving the old defs in case", _90980)
   Exit: (297) [system] string_concat(a, "ving the old defs in case", "aving the old defs in case")
^  Exit: (296) [user] read_until_eol((0x55aefe44e2f0), "aving the old defs in case")
   Call: (296) [system] string_concat(e, "aving the old defs in case", _83552)
   Exit: (296) [system] string_concat(e, "aving the old defs in case", "eaving the old defs in case")
^  Exit: (295) [user] read_until_eol((0x55aefe44e2f0), "eaving the old defs in case")
   Call: (295) [system] string_concat(l, "eaving the old defs in case", _76124)
   Exit: (295) [system] string_concat(l, "eaving the old defs in case", "leaving the old defs in case")
^  Exit: (294) [user] read_until_eol((0x55aefe44e2f0), "leaving the old defs in case")
   Call: (294) [system] string_concat(' ', "leaving the old defs in case", _68696)
   Exit: (294) [system] string_concat(' ', "leaving the old defs in case", " leaving the old defs in case")
^  Exit: (293) [user] read_until_eol((0x55aefe44e2f0), " leaving the old defs in case")
   Call: (293) [system] string_concat(t, " leaving the old defs in case", _61268)
   Exit: (293) [system] string_concat(t, " leaving the old defs in case", "t leaving the old defs in case")
^  Exit: (292) [user] read_until_eol((0x55aefe44e2f0), "t leaving the old defs in case")
   Call: (292) [system] string_concat(u, "t leaving the old defs in case", _53840)
   Exit: (292) [system] string_concat(u, "t leaving the old defs in case", "ut leaving the old defs in case")
^  Exit: (291) [user] read_until_eol((0x55aefe44e2f0), "ut leaving the old defs in case")
   Call: (291) [system] string_concat(b, "ut leaving the old defs in case", _46412)
   Exit: (291) [system] string_concat(b, "ut leaving the old defs in case", "but leaving the old defs in case")
^  Exit: (290) [user] read_until_eol((0x55aefe44e2f0), "but leaving the old defs in case")
   Call: (290) [system] string_concat(' ', "but leaving the old defs in case", _38984)
   Exit: (290) [system] string_concat(' ', "but leaving the old defs in case", " but leaving the old defs in case")
^  Exit: (289) [user] read_until_eol((0x55aefe44e2f0), " but leaving the old defs in case")
   Call: (289) [system] string_concat(m, " but leaving the old defs in case", _31556)
   Exit: (289) [system] string_concat(m, " but leaving the old defs in case", "m but leaving the old defs in case")
^  Exit: (288) [user] read_until_eol((0x55aefe44e2f0), "m but leaving the old defs in case")
   Call: (288) [system] string_concat(e, "m but leaving the old defs in case", _24128)
   Exit: (288) [system] string_concat(e, "m but leaving the old defs in case", "em but leaving the old defs in case")
^  Exit: (287) [user] read_until_eol((0x55aefe44e2f0), "em but leaving the old defs in case")
   Call: (287) [system] string_concat(h, "em but leaving the old defs in case", _16700)
   Exit: (287) [system] string_concat(h, "em but leaving the old defs in case", "hem but leaving the old defs in case")
^  Exit: (286) [user] read_until_eol((0x55aefe44e2f0), "hem but leaving the old defs in case")
   Call: (286) [system] string_concat(t, "hem but leaving the old defs in case", _9272)
   Exit: (286) [system] string_concat(t, "hem but leaving the old defs in case", "them but leaving the old defs in case")
^  Exit: (285) [user] read_until_eol((0x55aefe44e2f0), "them but leaving the old defs in case")
   Call: (285) [system] string_concat(' ', "them but leaving the old defs in case", _6056)
   Exit: (285) [system] string_concat(' ', "them but leaving the old defs in case", " them but leaving the old defs in case")
^  Exit: (284) [user] read_until_eol((0x55aefe44e2f0), " them but leaving the old defs in case")
   Call: (284) [system] string_concat(e, " them but leaving the old defs in case", _6052)
   Exit: (284) [system] string_concat(e, " them but leaving the old defs in case", "e them but leaving the old defs in case")
^  Exit: (283) [user] read_until_eol((0x55aefe44e2f0), "e them but leaving the old defs in case")
   Call: (283) [system] string_concat(z, "e them but leaving the old defs in case", _6048)
   Exit: (283) [system] string_concat(z, "e them but leaving the old defs in case", "ze them but leaving the old defs in case")
^  Exit: (282) [user] read_until_eol((0x55aefe44e2f0), "ze them but leaving the old defs in case")
   Call: (282) [system] string_concat(i, "ze them but leaving the old defs in case", _6044)
   Exit: (282) [system] string_concat(i, "ze them but leaving the old defs in case", "ize them but leaving the old defs in case")
^  Exit: (281) [user] read_until_eol((0x55aefe44e2f0), "ize them but leaving the old defs in case")
   Call: (281) [system] string_concat(l, "ize them but leaving the old defs in case", _6040)
   Exit: (281) [system] string_concat(l, "ize them but leaving the old defs in case", "lize them but leaving the old defs in case")
^  Exit: (280) [user] read_until_eol((0x55aefe44e2f0), "lize them but leaving the old defs in case")
   Call: (280) [system] string_concat(a, "lize them but leaving the old defs in case", _6036)
   Exit: (280) [system] string_concat(a, "lize them but leaving the old defs in case", "alize them but leaving the old defs in case")
^  Exit: (279) [user] read_until_eol((0x55aefe44e2f0), "alize them but leaving the old defs in case")
   Call: (279) [system] string_concat(i, "alize them but leaving the old defs in case", _6032)
   Exit: (279) [system] string_concat(i, "alize them but leaving the old defs in case", "ialize them but leaving the old defs in case")
^  Exit: (278) [user] read_until_eol((0x55aefe44e2f0), "ialize them but leaving the old defs in case")
   Call: (278) [system] string_concat(c, "ialize them but leaving the old defs in case", _6028)
   Exit: (278) [system] string_concat(c, "ialize them but leaving the old defs in case", "cialize them but leaving the old defs in case")
^  Exit: (277) [user] read_until_eol((0x55aefe44e2f0), "cialize them but leaving the old defs in case")
   Call: (277) [system] string_concat(e, "cialize them but leaving the old defs in case", _6024)
   Exit: (277) [system] string_concat(e, "cialize them but leaving the old defs in case", "ecialize them but leaving the old defs in case")
^  Exit: (276) [user] read_until_eol((0x55aefe44e2f0), "ecialize them but leaving the old defs in case")
   Call: (276) [system] string_concat(p, "ecialize them but leaving the old defs in case", _6020)
   Exit: (276) [system] string_concat(p, "ecialize them but leaving the old defs in case", "pecialize them but leaving the old defs in case")
^  Exit: (275) [user] read_until_eol((0x55aefe44e2f0), "pecialize them but leaving the old defs in case")
   Call: (275) [system] string_concat(s, "pecialize them but leaving the old defs in case", _6016)
   Exit: (275) [system] string_concat(s, "pecialize them but leaving the old defs in case", "specialize them but leaving the old defs in case")
^  Exit: (274) [user] read_until_eol((0x55aefe44e2f0), "specialize them but leaving the old defs in case")
   Call: (274) [system] string_concat(' ', "specialize them but leaving the old defs in case", _6012)
   Exit: (274) [system] string_concat(' ', "specialize them but leaving the old defs in case", " specialize them but leaving the old defs in case")
^  Exit: (273) [user] read_until_eol((0x55aefe44e2f0), " specialize them but leaving the old defs in case")
   Call: (273) [system] string_concat(e, " specialize them but leaving the old defs in case", _6008)
   Exit: (273) [system] string_concat(e, " specialize them but leaving the old defs in case", "e specialize them but leaving the old defs in case")
^  Exit: (272) [user] read_until_eol((0x55aefe44e2f0), "e specialize them but leaving the old defs in case")
   Call: (272) [system] string_concat('W', "e specialize them but leaving the old defs in case", _6004)
   Exit: (272) [system] string_concat('W', "e specialize them but leaving the old defs in case", "We specialize them but leaving the old defs in case")
^  Exit: (271) [user] read_until_eol((0x55aefe44e2f0), "We specialize them but leaving the old defs in case")
   Call: (271) [system] string_concat(' ', "We specialize them but leaving the old defs in case", _6000)
   Exit: (271) [system] string_concat(' ', "We specialize them but leaving the old defs in case", " We specialize them but leaving the old defs in case")
^  Exit: (270) [user] read_until_eol((0x55aefe44e2f0), " We specialize them but leaving the old defs in case")
   Call: (270) [system] string_concat(;, " We specialize them but leaving the old defs in case", _5996)
   Exit: (270) [system] string_concat(;, " We specialize them but leaving the old defs in case", "; We specialize them but leaving the old defs in case")
^  Exit: (269) [user] read_until_eol((0x55aefe44e2f0), "; We specialize them but leaving the old defs in case")
^  Call: (269) [user] assertz(metta_file_comment(14, 0, 360, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$stream_position'(360, 14, 0, 360)))
^  Exit: (269) [user] assertz(metta_file_comment(14, 0, 360, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$stream_position'(360, 14, 0, 360)))
^  Exit: (268) [user] read_comment((0x55aefe44e2f0))
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _445740)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (269) [system] '('=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', 'white')
^  Redo: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', end_of_line)
^  Redo: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', space)
^  Redo: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (267) [system] get_char((0x55aefe44e2f0), _463448)
   Exit: (267) [system] get_char((0x55aefe44e2f0), '(')
   Call: (267) [system] '('='('
   Exit: (267) [system] '('='('
^  Call: (267) [user] read_list(')', (0x55aefe44e2f0), _5942)
^  Unify: (267) [user] read_list(')', (0x55aefe44e2f0), _5942)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _470874)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, 'white')
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, end_of_line)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, space)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _487658)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), :)
   Call: (268) [system] (:)=')'
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _5942)
   Call: (268) [system] (:)=end_of_file
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _5942)
^  Call: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _493236)
^  Unify: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _493236)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _496950)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, 'white')
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, end_of_line)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, space)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, cntrl)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] get_char((0x55aefe44e2f0), _513734)
   Exit: (269) [system] get_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)='('
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _493236)
   Call: (269) [system] (:)='['
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _493236)
   Call: (269) [system] (:)='{'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _493236)
   Call: (269) [system] (:)='"'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _493236)
   Call: (269) [system] (:)=!
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _5980)
   Call: (269) [system] (:)='\''
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _5980)
   Call: (269) [system] (:)='`'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _5980)
   Call: (269) [system] (:)=end_of_file
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _5980)
^  Call: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _5980)
^  Unify: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _5980)
^  Call: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _14308)
^  Unify: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _14308)
   Call: (271) [system] peek_char((0x55aefe44e2f0), _16174)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] is_delimiter(' ')
^  Unify: (271) [user] is_delimiter(' ')
   Call: (272) [system] char_type(' ', space)
   Exit: (272) [system] char_type(' ', space)
^  Exit: (271) [user] is_delimiter(' ')
   Call: (271) [system] _14308=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (270) [user] classify_and_convert_charseq(:, [], _5980)
^  Unify: (270) [user] classify_and_convert_charseq(:, [], _5980)
^  Call: (272) [system] setup_call_cleanup('$notrace'(_27340, _27342), once(user:catch(read_from_chars([:], _5980), _27316, fail)), '$restore_trace'(_27340, _27342))
^  Unify: (272) [system] setup_call_cleanup(system:'$notrace'(_27340, _27342), system:once(user:catch(read_from_chars([:], _5980), _27316, fail)), system:'$restore_trace'(_27340, _27342))
^  Call: (273) [system] sig_atomic(system:'$notrace'(_27340, _27342))
^  Exit: (272) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([:], :), _27316, fail)), system:'$restore_trace'(3, -1))
   Call: (271) [system] atomic(:)
   Exit: (271) [system] atomic(:)
^  Exit: (270) [user] classify_and_convert_charseq(:, [], :)
^  Exit: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, :)
^  Exit: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), :)
^  Call: (268) [user] read_list(')', (0x55aefe44e2f0), _35778)
^  Unify: (268) [user] read_list(')', (0x55aefe44e2f0), _35778)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _39492)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (270) [system] ' '=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(' ')
^  Unify: (270) [user] is_like_space(' ')
   Call: (271) [system] char_type(' ', 'white')
   Exit: (271) [system] char_type(' ', 'white')
^  Exit: (270) [user] is_like_space(' ')
   Call: (270) [system] get_char((0x55aefe44e2f0), _48150)
   Exit: (270) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _51778)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), c)
   Call: (271) [system] c=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, 'white')
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, end_of_line)
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, space)
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _69486)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), c)
   Call: (269) [system] c=')'
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _35778)
   Call: (269) [system] c=end_of_file
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _35778)
^  Call: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _75064)
^  Unify: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _75064)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _78778)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), c)
   Call: (271) [system] c=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, 'white')
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, end_of_line)
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, space)
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] get_char((0x55aefe44e2f0), _95562)
   Exit: (270) [system] get_char((0x55aefe44e2f0), c)
   Call: (270) [system] c='('
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _75064)
   Call: (270) [system] c='['
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _75064)
   Call: (270) [system] c='{'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _75064)
   Call: (270) [system] c='"'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _75064)
   Call: (270) [system] c=!
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _75064)
   Call: (270) [system] c='\''
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _75064)
   Call: (270) [system] c='`'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _75064)
   Call: (270) [system] c=end_of_file
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _75064)
^  Call: (270) [user] read_symbolic(')', (0x55aefe44e2f0), c, _75064)
^  Unify: (270) [user] read_symbolic(')', (0x55aefe44e2f0), c, _75064)
^  Call: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _114172)
^  Unify: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _114172)
   Call: (272) [system] peek_char((0x55aefe44e2f0), _116038)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (272) [user] is_delimiter(o)
^  Unify: (272) [user] is_delimiter(o)
   Call: (273) [system] char_type(o, space)
^  Redo: (272) [user] is_delimiter(o)
   Call: (273) [system] arg(_121678, v('(', ')', end_of_file), o)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _114172)
   Call: (272) [system] ')'==o
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _114172)
   Call: (272) [system] get_char((0x55aefe44e2f0), o)
   Exit: (272) [system] get_char((0x55aefe44e2f0), o)
   Call: (272) [system] o=(\)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _114172)
^  Call: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _129044)
^  Unify: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _129044)
   Call: (273) [system] peek_char((0x55aefe44e2f0), _130910)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (273) [user] is_delimiter(n)
^  Unify: (273) [user] is_delimiter(n)
   Call: (274) [system] char_type(n, space)
^  Redo: (273) [user] is_delimiter(n)
   Call: (274) [system] arg(_136550, v('(', ')', end_of_file), n)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _129044)
   Call: (273) [system] ')'==n
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _129044)
   Call: (273) [system] get_char((0x55aefe44e2f0), n)
   Exit: (273) [system] get_char((0x55aefe44e2f0), n)
   Call: (273) [system] n=(\)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _129044)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _143916)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _143916)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _145782)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (274) [user] is_delimiter(s)
^  Unify: (274) [user] is_delimiter(s)
   Call: (275) [system] char_type(s, space)
^  Redo: (274) [user] is_delimiter(s)
   Call: (275) [system] arg(_151422, v('(', ')', end_of_file), s)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _143916)
   Call: (274) [system] ')'==s
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _143916)
   Call: (274) [system] get_char((0x55aefe44e2f0), s)
   Exit: (274) [system] get_char((0x55aefe44e2f0), s)
   Call: (274) [system] s=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _143916)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _158788)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _158788)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _160654)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), -)
^  Call: (275) [user] is_delimiter(-)
^  Unify: (275) [user] is_delimiter(-)
   Call: (276) [system] char_type(-, space)
^  Redo: (275) [user] is_delimiter(-)
   Call: (276) [system] arg(_166294, v('(', ')', end_of_file), -)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _158788)
   Call: (275) [system] ')'==(-)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _158788)
   Call: (275) [system] get_char((0x55aefe44e2f0), -)
   Exit: (275) [system] get_char((0x55aefe44e2f0), -)
   Call: (275) [system] (-)=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _158788)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _173660)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _173660)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _175526)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (276) [user] is_delimiter(a)
^  Unify: (276) [user] is_delimiter(a)
   Call: (277) [system] char_type(a, space)
^  Redo: (276) [user] is_delimiter(a)
   Call: (277) [system] arg(_181166, v('(', ')', end_of_file), a)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _173660)
   Call: (276) [system] ')'==a
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _173660)
   Call: (276) [system] get_char((0x55aefe44e2f0), a)
   Exit: (276) [system] get_char((0x55aefe44e2f0), a)
   Call: (276) [system] a=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _173660)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _188532)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _188532)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _190398)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (277) [user] is_delimiter(t)
^  Unify: (277) [user] is_delimiter(t)
   Call: (278) [system] char_type(t, space)
^  Redo: (277) [user] is_delimiter(t)
   Call: (278) [system] arg(_196038, v('(', ')', end_of_file), t)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _188532)
   Call: (277) [system] ')'==t
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _188532)
   Call: (277) [system] get_char((0x55aefe44e2f0), t)
   Exit: (277) [system] get_char((0x55aefe44e2f0), t)
   Call: (277) [system] t=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _188532)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _203404)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _203404)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _205270)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (278) [user] is_delimiter(o)
^  Unify: (278) [user] is_delimiter(o)
   Call: (279) [system] char_type(o, space)
^  Redo: (278) [user] is_delimiter(o)
   Call: (279) [system] arg(_210910, v('(', ')', end_of_file), o)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _203404)
   Call: (278) [system] ')'==o
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _203404)
   Call: (278) [system] get_char((0x55aefe44e2f0), o)
   Exit: (278) [system] get_char((0x55aefe44e2f0), o)
   Call: (278) [system] o=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _203404)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _218276)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _218276)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _220142)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (279) [user] is_delimiter(m)
^  Unify: (279) [user] is_delimiter(m)
   Call: (280) [system] char_type(m, space)
^  Redo: (279) [user] is_delimiter(m)
   Call: (280) [system] arg(_225782, v('(', ')', end_of_file), m)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _218276)
   Call: (279) [system] ')'==m
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _218276)
   Call: (279) [system] get_char((0x55aefe44e2f0), m)
   Exit: (279) [system] get_char((0x55aefe44e2f0), m)
   Call: (279) [system] m=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _218276)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _233148)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _233148)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _235014)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (280) [user] is_delimiter(' ')
^  Unify: (280) [user] is_delimiter(' ')
   Call: (281) [system] char_type(' ', space)
   Exit: (281) [system] char_type(' ', space)
^  Exit: (280) [user] is_delimiter(' ')
   Call: (280) [system] _233148=[]
   Exit: (280) [system] []=[]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (279) [system] _218276=[m]
   Exit: (279) [system] [m]=[m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (278) [system] _203404=[o, m]
   Exit: (278) [system] [o, m]=[o, m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (277) [system] _188532=[t, o, m]
   Exit: (277) [system] [t, o, m]=[t, o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
   Call: (276) [system] _173660=[a, t, o, m]
   Exit: (276) [system] [a, t, o, m]=[a, t, o, m]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, t, o, m])
   Call: (275) [system] _158788=[-, a, t, o, m]
   Exit: (275) [system] [-, a, t, o, m]=[-, a, t, o, m]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [-, a, t, o, m])
   Call: (274) [system] _143916=[s, -, a, t, o, m]
   Exit: (274) [system] [s, -, a, t, o, m]=[s, -, a, t, o, m]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, -, a, t, o, m])
   Call: (273) [system] _129044=[n, s, -, a, t, o, m]
   Exit: (273) [system] [n, s, -, a, t, o, m]=[n, s, -, a, t, o, m]
^  Exit: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n, s, -, a, t, o, m])
   Call: (272) [system] _114172=[o, n, s, -, a, t, o, m]
   Exit: (272) [system] [o, n, s, -, a, t, o, m]=[o, n, s, -, a, t, o, m]
^  Exit: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, n, s, -, a, t, o, m])
^  Call: (271) [user] classify_and_convert_charseq(c, [o, n, s, -, a, t, o, m], _75064)
^  Unify: (271) [user] classify_and_convert_charseq(c, [o, n, s, -, a, t, o, m], _75064)
^  Call: (273) [system] setup_call_cleanup('$notrace'(_268532, _268534), once(user:catch(read_from_chars([c, o, n, s, -, a, t, o, m], _75064), _268508, fail)), '$restore_trace'(_268532, _268534))
^  Unify: (273) [system] setup_call_cleanup(system:'$notrace'(_268532, _268534), system:once(user:catch(read_from_chars([c, o, n, s, -, a, t, o, m], _75064), _268508, fail)), system:'$restore_trace'(_268532, _268534))
^  Call: (274) [system] sig_atomic(system:'$notrace'(_268532, _268534))
^  Exit: (273) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([c, o, n, s, -, a, t, o, m], cons-atom), _268508, fail)), system:'$restore_trace'(3, -1))
   Call: (272) [system] atomic(cons-atom)
^  Redo: (271) [user] classify_and_convert_charseq(c, [o, n, s, -, a, t, o, m], _75064)
^  Unify: (271) [user] classify_and_convert_charseq(c, [o, n, s, -, a, t, o, m], _75064)
   Call: (272) [system] atom_chars(_75064, [c, o, n, s, -, a, t, o, m])
   Exit: (272) [system] atom_chars('cons-atom', [c, o, n, s, -, a, t, o, m])
^  Exit: (271) [user] classify_and_convert_charseq(c, [o, n, s, -, a, t, o, m], 'cons-atom')
^  Exit: (270) [user] read_symbolic(')', (0x55aefe44e2f0), c, 'cons-atom')
^  Exit: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), 'cons-atom')
^  Call: (269) [user] read_list(')', (0x55aefe44e2f0), _279778)
^  Unify: (269) [user] read_list(')', (0x55aefe44e2f0), _279778)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _283492)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (271) [system] ' '=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(' ')
^  Unify: (271) [user] is_like_space(' ')
   Call: (272) [system] char_type(' ', 'white')
   Exit: (272) [system] char_type(' ', 'white')
^  Exit: (271) [user] is_like_space(' ')
   Call: (271) [system] get_char((0x55aefe44e2f0), _292150)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _295778)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _313486)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (270) [system] '('=')'
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _279778)
   Call: (270) [system] '('=end_of_file
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _279778)
^  Call: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _319064)
^  Unify: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _319064)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _322778)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] get_char((0x55aefe44e2f0), _339562)
   Exit: (271) [system] get_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('='('
   Exit: (271) [system] '('='('
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _319064)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _319064)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _346988)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, 'white')
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, end_of_line)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, space)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _363772)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), -)
   Call: (272) [system] (-)=')'
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _319064)
   Call: (272) [system] (-)=end_of_file
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _319064)
^  Call: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _369350)
^  Unify: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _369350)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _373064)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, 'white')
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, end_of_line)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, space)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] get_char((0x55aefe44e2f0), _389848)
   Exit: (273) [system] get_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)='('
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _369350)
   Call: (273) [system] (-)='['
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _369350)
   Call: (273) [system] (-)='{'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _369350)
   Call: (273) [system] (-)='"'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _369350)
   Call: (273) [system] (-)=!
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _369350)
   Call: (273) [system] (-)='\''
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _369350)
   Call: (273) [system] (-)='`'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _369350)
   Call: (273) [system] (-)=end_of_file
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _369350)
^  Call: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _369350)
^  Unify: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _369350)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _408458)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _408458)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _410324)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), >)
^  Call: (275) [user] is_delimiter(>)
^  Unify: (275) [user] is_delimiter(>)
   Call: (276) [system] char_type(>, space)
^  Redo: (275) [user] is_delimiter(>)
   Call: (276) [system] arg(_415964, v('(', ')', end_of_file), >)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _408458)
   Call: (275) [system] ')'==(>)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _408458)
   Call: (275) [system] get_char((0x55aefe44e2f0), >)
   Exit: (275) [system] get_char((0x55aefe44e2f0), >)
   Call: (275) [system] (>)=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _408458)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _423330)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _423330)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _425196)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] is_delimiter(' ')
^  Unify: (276) [user] is_delimiter(' ')
   Call: (277) [system] char_type(' ', space)
   Exit: (277) [system] char_type(' ', space)
^  Exit: (276) [user] is_delimiter(' ')
   Call: (276) [system] _423330=[]
   Exit: (276) [system] []=[]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (275) [system] _408458=[>]
   Exit: (275) [system] [>]=[>]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [>])
^  Call: (274) [user] classify_and_convert_charseq(-, [>], _369350)
^  Unify: (274) [user] classify_and_convert_charseq(-, [>], _369350)
^  Call: (276) [system] setup_call_cleanup('$notrace'(_439156, _439158), once(user:catch(read_from_chars([-, >], _369350), _439132, fail)), '$restore_trace'(_439156, _439158))
^  Unify: (276) [system] setup_call_cleanup(system:'$notrace'(_439156, _439158), system:once(user:catch(read_from_chars([-, >], _369350), _439132, fail)), system:'$restore_trace'(_439156, _439158))
^  Call: (277) [system] sig_atomic(system:'$notrace'(_439156, _439158))
^  Exit: (276) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([-, >], ->), _439132, fail)), system:'$restore_trace'(3, -1))
   Call: (275) [system] atomic(->)
   Exit: (275) [system] atomic(->)
^  Exit: (274) [user] classify_and_convert_charseq(-, [>], ->)
^  Exit: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, ->)
^  Exit: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), ->)
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _447594)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _447594)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _451308)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (274) [system] ' '=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(' ')
^  Unify: (274) [user] is_like_space(' ')
   Call: (275) [system] char_type(' ', 'white')
   Exit: (275) [system] char_type(' ', 'white')
^  Exit: (274) [user] is_like_space(' ')
   Call: (274) [system] get_char((0x55aefe44e2f0), _459966)
   Exit: (274) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _463594)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', 'white')
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', end_of_line)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', space)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _481302)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (273) [system] 'A'=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _447594)
   Call: (273) [system] 'A'=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _447594)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _486880)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _486880)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _490594)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', 'white')
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', end_of_line)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', space)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _507378)
   Exit: (274) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (274) [system] 'A'='('
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _486880)
   Call: (274) [system] 'A'='['
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _486880)
   Call: (274) [system] 'A'='{'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _486880)
   Call: (274) [system] 'A'='"'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _486880)
   Call: (274) [system] 'A'=!
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _486880)
   Call: (274) [system] 'A'='\''
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _486880)
   Call: (274) [system] 'A'='`'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _486880)
   Call: (274) [system] 'A'=end_of_file
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _486880)
^  Call: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _6004)
^  Unify: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _6004)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _7842)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _7842)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _9708)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (276) [user] is_delimiter(t)
^  Unify: (276) [user] is_delimiter(t)
   Call: (277) [system] char_type(t, space)
^  Redo: (276) [user] is_delimiter(t)
   Call: (277) [system] arg(_15348, v('(', ')', end_of_file), t)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _7842)
   Call: (276) [system] ')'==t
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _7842)
   Call: (276) [system] get_char((0x55aefe44e2f0), t)
   Exit: (276) [system] get_char((0x55aefe44e2f0), t)
   Call: (276) [system] t=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _7842)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _22714)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _22714)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _24580)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (277) [user] is_delimiter(o)
^  Unify: (277) [user] is_delimiter(o)
   Call: (278) [system] char_type(o, space)
^  Redo: (277) [user] is_delimiter(o)
   Call: (278) [system] arg(_30220, v('(', ')', end_of_file), o)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _22714)
   Call: (277) [system] ')'==o
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _22714)
   Call: (277) [system] get_char((0x55aefe44e2f0), o)
   Exit: (277) [system] get_char((0x55aefe44e2f0), o)
   Call: (277) [system] o=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _22714)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _37586)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _37586)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _39452)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (278) [user] is_delimiter(m)
^  Unify: (278) [user] is_delimiter(m)
   Call: (279) [system] char_type(m, space)
^  Redo: (278) [user] is_delimiter(m)
   Call: (279) [system] arg(_45092, v('(', ')', end_of_file), m)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _37586)
   Call: (278) [system] ')'==m
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _37586)
   Call: (278) [system] get_char((0x55aefe44e2f0), m)
   Exit: (278) [system] get_char((0x55aefe44e2f0), m)
   Call: (278) [system] m=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _37586)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _52458)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _52458)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _54324)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (279) [user] is_delimiter(' ')
^  Unify: (279) [user] is_delimiter(' ')
   Call: (280) [system] char_type(' ', space)
   Exit: (280) [system] char_type(' ', space)
^  Exit: (279) [user] is_delimiter(' ')
   Call: (279) [system] _52458=[]
   Exit: (279) [system] []=[]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (278) [system] _37586=[m]
   Exit: (278) [system] [m]=[m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (277) [system] _22714=[o, m]
   Exit: (277) [system] [o, m]=[o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (276) [system] _7842=[t, o, m]
   Exit: (276) [system] [t, o, m]=[t, o, m]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (275) [user] classify_and_convert_charseq('A', [t, o, m], _6004)
^  Unify: (275) [user] classify_and_convert_charseq('A', [t, o, m], _6004)
^  Call: (277) [system] setup_call_cleanup('$notrace'(_73872, _73874), once(user:catch(read_from_chars(['A', t, o, m], _6004), _73848, fail)), '$restore_trace'(_73872, _73874))
^  Unify: (277) [system] setup_call_cleanup(system:'$notrace'(_73872, _73874), system:once(user:catch(read_from_chars(['A', t, o, m], _6004), _73848, fail)), system:'$restore_trace'(_73872, _73874))
^  Call: (278) [system] sig_atomic(system:'$notrace'(_73872, _73874))
^  Exit: (277) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _6004), _73848, fail)), system:'$restore_trace'(3, -1))
   Call: (276) [system] atomic(_6004)
^  Redo: (275) [user] classify_and_convert_charseq('A', [t, o, m], _6004)
^  Unify: (275) [user] classify_and_convert_charseq('A', [t, o, m], _6004)
   Call: (276) [system] atom_chars(_6004, ['A', t, o, m])
   Exit: (276) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (275) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (273) [user] read_list(')', (0x55aefe44e2f0), _85126)
^  Unify: (273) [user] read_list(')', (0x55aefe44e2f0), _85126)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _88840)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (275) [system] ' '=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(' ')
^  Unify: (275) [user] is_like_space(' ')
   Call: (276) [system] char_type(' ', 'white')
   Exit: (276) [system] char_type(' ', 'white')
^  Exit: (275) [user] is_like_space(' ')
   Call: (275) [system] get_char((0x55aefe44e2f0), _97498)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _101126)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (276) [system] 'E'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', 'white')
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', end_of_line)
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', space)
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _118834)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (274) [system] 'E'=')'
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _85126)
   Call: (274) [system] 'E'=end_of_file
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _85126)
^  Call: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _124412)
^  Unify: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _124412)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _128126)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (276) [system] 'E'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', 'white')
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', end_of_line)
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', space)
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] get_char((0x55aefe44e2f0), _144910)
   Exit: (275) [system] get_char((0x55aefe44e2f0), 'E')
   Call: (275) [system] 'E'='('
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _124412)
   Call: (275) [system] 'E'='['
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _124412)
   Call: (275) [system] 'E'='{'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _124412)
   Call: (275) [system] 'E'='"'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _124412)
   Call: (275) [system] 'E'=!
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _124412)
   Call: (275) [system] 'E'='\''
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _124412)
   Call: (275) [system] 'E'='`'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _124412)
   Call: (275) [system] 'E'=end_of_file
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _124412)
^  Call: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', _124412)
^  Unify: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', _124412)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _163520)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _163520)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _165386)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), x)
^  Call: (277) [user] is_delimiter(x)
^  Unify: (277) [user] is_delimiter(x)
   Call: (278) [system] char_type(x, space)
^  Redo: (277) [user] is_delimiter(x)
   Call: (278) [system] arg(_171026, v('(', ')', end_of_file), x)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _163520)
   Call: (277) [system] ')'==x
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _163520)
   Call: (277) [system] get_char((0x55aefe44e2f0), x)
   Exit: (277) [system] get_char((0x55aefe44e2f0), x)
   Call: (277) [system] x=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _163520)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _178392)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _178392)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _180258)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (278) [user] is_delimiter(p)
^  Unify: (278) [user] is_delimiter(p)
   Call: (279) [system] char_type(p, space)
^  Redo: (278) [user] is_delimiter(p)
   Call: (279) [system] arg(_185898, v('(', ')', end_of_file), p)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _178392)
   Call: (278) [system] ')'==p
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _178392)
   Call: (278) [system] get_char((0x55aefe44e2f0), p)
   Exit: (278) [system] get_char((0x55aefe44e2f0), p)
   Call: (278) [system] p=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _178392)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _193264)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _193264)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _195130)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (279) [user] is_delimiter(r)
^  Unify: (279) [user] is_delimiter(r)
   Call: (280) [system] char_type(r, space)
^  Redo: (279) [user] is_delimiter(r)
   Call: (280) [system] arg(_200770, v('(', ')', end_of_file), r)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _193264)
   Call: (279) [system] ')'==r
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _193264)
   Call: (279) [system] get_char((0x55aefe44e2f0), r)
   Exit: (279) [system] get_char((0x55aefe44e2f0), r)
   Call: (279) [system] r=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _193264)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _208136)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _208136)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _210002)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (280) [user] is_delimiter(e)
^  Unify: (280) [user] is_delimiter(e)
   Call: (281) [system] char_type(e, space)
^  Redo: (280) [user] is_delimiter(e)
   Call: (281) [system] arg(_215642, v('(', ')', end_of_file), e)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _208136)
   Call: (280) [system] ')'==e
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _208136)
   Call: (280) [system] get_char((0x55aefe44e2f0), e)
   Exit: (280) [system] get_char((0x55aefe44e2f0), e)
   Call: (280) [system] e=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _208136)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _223008)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _223008)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _224874)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (281) [user] is_delimiter(s)
^  Unify: (281) [user] is_delimiter(s)
   Call: (282) [system] char_type(s, space)
^  Redo: (281) [user] is_delimiter(s)
   Call: (282) [system] arg(_230514, v('(', ')', end_of_file), s)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _223008)
   Call: (281) [system] ')'==s
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _223008)
   Call: (281) [system] get_char((0x55aefe44e2f0), s)
   Exit: (281) [system] get_char((0x55aefe44e2f0), s)
   Call: (281) [system] s=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _223008)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237880)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237880)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _239746)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (282) [user] is_delimiter(s)
^  Unify: (282) [user] is_delimiter(s)
   Call: (283) [system] char_type(s, space)
^  Redo: (282) [user] is_delimiter(s)
   Call: (283) [system] arg(_245386, v('(', ')', end_of_file), s)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237880)
   Call: (282) [system] ')'==s
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237880)
   Call: (282) [system] get_char((0x55aefe44e2f0), s)
   Exit: (282) [system] get_char((0x55aefe44e2f0), s)
   Call: (282) [system] s=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237880)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _252752)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _252752)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _254618)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (283) [user] is_delimiter(i)
^  Unify: (283) [user] is_delimiter(i)
   Call: (284) [system] char_type(i, space)
^  Redo: (283) [user] is_delimiter(i)
   Call: (284) [system] arg(_260258, v('(', ')', end_of_file), i)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _252752)
   Call: (283) [system] ')'==i
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _252752)
   Call: (283) [system] get_char((0x55aefe44e2f0), i)
   Exit: (283) [system] get_char((0x55aefe44e2f0), i)
   Call: (283) [system] i=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _252752)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _267624)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _267624)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _269490)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (284) [user] is_delimiter(o)
^  Unify: (284) [user] is_delimiter(o)
   Call: (285) [system] char_type(o, space)
^  Redo: (284) [user] is_delimiter(o)
   Call: (285) [system] arg(_275130, v('(', ')', end_of_file), o)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _267624)
   Call: (284) [system] ')'==o
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _267624)
   Call: (284) [system] get_char((0x55aefe44e2f0), o)
   Exit: (284) [system] get_char((0x55aefe44e2f0), o)
   Call: (284) [system] o=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _267624)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _282496)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _282496)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _284362)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (285) [user] is_delimiter(n)
^  Unify: (285) [user] is_delimiter(n)
   Call: (286) [system] char_type(n, space)
^  Redo: (285) [user] is_delimiter(n)
   Call: (286) [system] arg(_290002, v('(', ')', end_of_file), n)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _282496)
   Call: (285) [system] ')'==n
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _282496)
   Call: (285) [system] get_char((0x55aefe44e2f0), n)
   Exit: (285) [system] get_char((0x55aefe44e2f0), n)
   Call: (285) [system] n=(\)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _282496)
^  Call: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _297368)
^  Unify: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _297368)
   Call: (286) [system] peek_char((0x55aefe44e2f0), _299234)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (286) [user] is_delimiter(' ')
^  Unify: (286) [user] is_delimiter(' ')
   Call: (287) [system] char_type(' ', space)
   Exit: (287) [system] char_type(' ', space)
^  Exit: (286) [user] is_delimiter(' ')
   Call: (286) [system] _297368=[]
   Exit: (286) [system] []=[]
^  Exit: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (285) [system] _282496=[n]
   Exit: (285) [system] [n]=[n]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (284) [system] _267624=[o, n]
   Exit: (284) [system] [o, n]=[o, n]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, n])
   Call: (283) [system] _252752=[i, o, n]
   Exit: (283) [system] [i, o, n]=[i, o, n]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, o, n])
   Call: (282) [system] _237880=[s, i, o, n]
   Exit: (282) [system] [s, i, o, n]=[s, i, o, n]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, i, o, n])
   Call: (281) [system] _223008=[s, s, i, o, n]
   Exit: (281) [system] [s, s, i, o, n]=[s, s, i, o, n]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, s, i, o, n])
   Call: (280) [system] _208136=[e, s, s, i, o, n]
   Exit: (280) [system] [e, s, s, i, o, n]=[e, s, s, i, o, n]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, s, s, i, o, n])
   Call: (279) [system] _193264=[r, e, s, s, i, o, n]
   Exit: (279) [system] [r, e, s, s, i, o, n]=[r, e, s, s, i, o, n]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, e, s, s, i, o, n])
   Call: (278) [system] _178392=[p, r, e, s, s, i, o, n]
   Exit: (278) [system] [p, r, e, s, s, i, o, n]=[p, r, e, s, s, i, o, n]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, r, e, s, s, i, o, n])
   Call: (277) [system] _163520=[x, p, r, e, s, s, i, o, n]
   Exit: (277) [system] [x, p, r, e, s, s, i, o, n]=[x, p, r, e, s, s, i, o, n]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [x, p, r, e, s, s, i, o, n])
^  Call: (276) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _124412)
^  Unify: (276) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _124412)
^  Call: (278) [system] setup_call_cleanup('$notrace'(_335546, _335548), once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _124412), _335522, fail)), '$restore_trace'(_335546, _335548))
^  Unify: (278) [system] setup_call_cleanup(system:'$notrace'(_335546, _335548), system:once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _124412), _335522, fail)), system:'$restore_trace'(_335546, _335548))
^  Call: (279) [system] sig_atomic(system:'$notrace'(_335546, _335548))
^  Exit: (278) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _124412), _335522, fail)), system:'$restore_trace'(3, -1))
   Call: (277) [system] atomic(_124412)
^  Redo: (276) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _124412)
^  Unify: (276) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _124412)
   Call: (277) [system] atom_chars(_124412, ['E', x, p, r, e, s, s, i, o, n])
   Exit: (277) [system] atom_chars('Expression', ['E', x, p, r, e, s, s, i, o, n])
^  Exit: (276) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], 'Expression')
^  Exit: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', 'Expression')
^  Exit: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Expression')
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _346800)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _346800)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _350514)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (276) [system] ' '=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(' ')
^  Unify: (276) [user] is_like_space(' ')
   Call: (277) [system] char_type(' ', 'white')
   Exit: (277) [system] char_type(' ', 'white')
^  Exit: (276) [user] is_like_space(' ')
   Call: (276) [system] get_char((0x55aefe44e2f0), _359172)
   Exit: (276) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _362800)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (277) [system] 'E'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space('E')
^  Unify: (277) [user] is_like_space('E')
   Call: (278) [system] char_type('E', 'white')
^  Redo: (277) [user] is_like_space('E')
^  Unify: (277) [user] is_like_space('E')
   Call: (278) [system] char_type('E', end_of_line)
^  Redo: (277) [user] is_like_space('E')
^  Unify: (277) [user] is_like_space('E')
   Call: (278) [system] char_type('E', space)
^  Redo: (277) [user] is_like_space('E')
^  Unify: (277) [user] is_like_space('E')
   Call: (278) [system] char_type('E', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _380508)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (275) [system] 'E'=')'
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _346800)
   Call: (275) [system] 'E'=end_of_file
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _346800)
^  Call: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _386086)
^  Unify: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _386086)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _389800)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (277) [system] 'E'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space('E')
^  Unify: (277) [user] is_like_space('E')
   Call: (278) [system] char_type('E', 'white')
^  Redo: (277) [user] is_like_space('E')
^  Unify: (277) [user] is_like_space('E')
   Call: (278) [system] char_type('E', end_of_line)
^  Redo: (277) [user] is_like_space('E')
^  Unify: (277) [user] is_like_space('E')
   Call: (278) [system] char_type('E', space)
^  Redo: (277) [user] is_like_space('E')
^  Unify: (277) [user] is_like_space('E')
   Call: (278) [system] char_type('E', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] get_char((0x55aefe44e2f0), _406584)
   Exit: (276) [system] get_char((0x55aefe44e2f0), 'E')
   Call: (276) [system] 'E'='('
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _386086)
   Call: (276) [system] 'E'='['
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _386086)
   Call: (276) [system] 'E'='{'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _386086)
   Call: (276) [system] 'E'='"'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _386086)
   Call: (276) [system] 'E'=!
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _386086)
   Call: (276) [system] 'E'='\''
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _386086)
   Call: (276) [system] 'E'='`'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _386086)
   Call: (276) [system] 'E'=end_of_file
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _386086)
^  Call: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', _386086)
^  Unify: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', _386086)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _425194)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _425194)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _427060)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), x)
^  Call: (278) [user] is_delimiter(x)
^  Unify: (278) [user] is_delimiter(x)
   Call: (279) [system] char_type(x, space)
^  Redo: (278) [user] is_delimiter(x)
   Call: (279) [system] arg(_432700, v('(', ')', end_of_file), x)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _425194)
   Call: (278) [system] ')'==x
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _425194)
   Call: (278) [system] get_char((0x55aefe44e2f0), x)
   Exit: (278) [system] get_char((0x55aefe44e2f0), x)
   Call: (278) [system] x=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _425194)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _440066)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _440066)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _441932)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (279) [user] is_delimiter(p)
^  Unify: (279) [user] is_delimiter(p)
   Call: (280) [system] char_type(p, space)
^  Redo: (279) [user] is_delimiter(p)
   Call: (280) [system] arg(_447572, v('(', ')', end_of_file), p)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _440066)
   Call: (279) [system] ')'==p
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _440066)
   Call: (279) [system] get_char((0x55aefe44e2f0), p)
   Exit: (279) [system] get_char((0x55aefe44e2f0), p)
   Call: (279) [system] p=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _440066)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _454938)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _454938)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _456804)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (280) [user] is_delimiter(r)
^  Unify: (280) [user] is_delimiter(r)
   Call: (281) [system] char_type(r, space)
^  Redo: (280) [user] is_delimiter(r)
   Call: (281) [system] arg(_462444, v('(', ')', end_of_file), r)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _454938)
   Call: (280) [system] ')'==r
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _454938)
   Call: (280) [system] get_char((0x55aefe44e2f0), r)
   Exit: (280) [system] get_char((0x55aefe44e2f0), r)
   Call: (280) [system] r=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _454938)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _469810)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _469810)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _471676)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (281) [user] is_delimiter(e)
^  Unify: (281) [user] is_delimiter(e)
   Call: (282) [system] char_type(e, space)
^  Redo: (281) [user] is_delimiter(e)
   Call: (282) [system] arg(_477316, v('(', ')', end_of_file), e)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _469810)
   Call: (281) [system] ')'==e
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _469810)
   Call: (281) [system] get_char((0x55aefe44e2f0), e)
   Exit: (281) [system] get_char((0x55aefe44e2f0), e)
   Call: (281) [system] e=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _469810)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _484682)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _484682)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _486548)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (282) [user] is_delimiter(s)
^  Unify: (282) [user] is_delimiter(s)
   Call: (283) [system] char_type(s, space)
^  Redo: (282) [user] is_delimiter(s)
   Call: (283) [system] arg(_492188, v('(', ')', end_of_file), s)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _484682)
   Call: (282) [system] ')'==s
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _484682)
   Call: (282) [system] get_char((0x55aefe44e2f0), s)
   Exit: (282) [system] get_char((0x55aefe44e2f0), s)
   Call: (282) [system] s=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _484682)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _499554)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _499554)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _501420)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (283) [user] is_delimiter(s)
^  Unify: (283) [user] is_delimiter(s)
   Call: (284) [system] char_type(s, space)
^  Redo: (283) [user] is_delimiter(s)
   Call: (284) [system] arg(_507060, v('(', ')', end_of_file), s)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _499554)
   Call: (283) [system] ')'==s
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _499554)
   Call: (283) [system] get_char((0x55aefe44e2f0), s)
   Exit: (283) [system] get_char((0x55aefe44e2f0), s)
   Call: (283) [system] s=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _499554)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _514426)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _514426)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _516292)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (284) [user] is_delimiter(i)
^  Unify: (284) [user] is_delimiter(i)
   Call: (285) [system] char_type(i, space)
^  Redo: (284) [user] is_delimiter(i)
   Call: (285) [system] arg(_521932, v('(', ')', end_of_file), i)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _514426)
   Call: (284) [system] ')'==i
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6044)
   Call: (284) [system] get_char((0x55aefe44e2f0), i)
   Exit: (284) [system] get_char((0x55aefe44e2f0), i)
   Call: (284) [system] i=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6044)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _11406)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _11406)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _13272)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (285) [user] is_delimiter(o)
^  Unify: (285) [user] is_delimiter(o)
   Call: (286) [system] char_type(o, space)
^  Redo: (285) [user] is_delimiter(o)
   Call: (286) [system] arg(_18912, v('(', ')', end_of_file), o)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _11406)
   Call: (285) [system] ')'==o
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _11406)
   Call: (285) [system] get_char((0x55aefe44e2f0), o)
   Exit: (285) [system] get_char((0x55aefe44e2f0), o)
   Call: (285) [system] o=(\)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _11406)
^  Call: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _26278)
^  Unify: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _26278)
   Call: (286) [system] peek_char((0x55aefe44e2f0), _28144)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (286) [user] is_delimiter(n)
^  Unify: (286) [user] is_delimiter(n)
   Call: (287) [system] char_type(n, space)
^  Redo: (286) [user] is_delimiter(n)
   Call: (287) [system] arg(_33784, v('(', ')', end_of_file), n)
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _26278)
   Call: (286) [system] ')'==n
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _26278)
   Call: (286) [system] get_char((0x55aefe44e2f0), n)
   Exit: (286) [system] get_char((0x55aefe44e2f0), n)
   Call: (286) [system] n=(\)
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _26278)
^  Call: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _41150)
^  Unify: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _41150)
   Call: (287) [system] peek_char((0x55aefe44e2f0), _43016)
   Exit: (287) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (287) [user] is_delimiter(')')
^  Unify: (287) [user] is_delimiter(')')
   Call: (288) [system] char_type(')', space)
^  Redo: (287) [user] is_delimiter(')')
   Call: (288) [system] arg(_48656, v('(', ')', end_of_file), ')')
   Exit: (288) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (287) [user] is_delimiter(')')
   Call: (287) [system] _41150=[]
   Exit: (287) [system] []=[]
^  Exit: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (286) [system] _26278=[n]
   Exit: (286) [system] [n]=[n]
^  Exit: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (285) [system] _11406=[o, n]
   Exit: (285) [system] [o, n]=[o, n]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, n])
   Call: (284) [system] _6044=[i, o, n]
   Exit: (284) [system] [i, o, n]=[i, o, n]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, o, n])
   Call: (283) [system] _6040=[s, i, o, n]
   Exit: (283) [system] [s, i, o, n]=[s, i, o, n]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, i, o, n])
   Call: (282) [system] _6036=[s, s, i, o, n]
   Exit: (282) [system] [s, s, i, o, n]=[s, s, i, o, n]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, s, i, o, n])
   Call: (281) [system] _6032=[e, s, s, i, o, n]
   Exit: (281) [system] [e, s, s, i, o, n]=[e, s, s, i, o, n]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, s, s, i, o, n])
   Call: (280) [system] _6028=[r, e, s, s, i, o, n]
   Exit: (280) [system] [r, e, s, s, i, o, n]=[r, e, s, s, i, o, n]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, e, s, s, i, o, n])
   Call: (279) [system] _6024=[p, r, e, s, s, i, o, n]
   Exit: (279) [system] [p, r, e, s, s, i, o, n]=[p, r, e, s, s, i, o, n]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, r, e, s, s, i, o, n])
   Call: (278) [system] _6020=[x, p, r, e, s, s, i, o, n]
   Exit: (278) [system] [x, p, r, e, s, s, i, o, n]=[x, p, r, e, s, s, i, o, n]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [x, p, r, e, s, s, i, o, n])
^  Call: (277) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _6016)
^  Unify: (277) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _6016)
^  Call: (279) [system] setup_call_cleanup('$notrace'(_81196, _81198), once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _6016), _81172, fail)), '$restore_trace'(_81196, _81198))
^  Unify: (279) [system] setup_call_cleanup(system:'$notrace'(_81196, _81198), system:once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _6016), _81172, fail)), system:'$restore_trace'(_81196, _81198))
^  Call: (280) [system] sig_atomic(system:'$notrace'(_81196, _81198))
^  Exit: (279) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _6016), _81172, fail)), system:'$restore_trace'(3, -1))
   Call: (278) [system] atomic(_6016)
^  Redo: (277) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _6016)
^  Unify: (277) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _6016)
   Call: (278) [system] atom_chars(_6016, ['E', x, p, r, e, s, s, i, o, n])
   Exit: (278) [system] atom_chars('Expression', ['E', x, p, r, e, s, s, i, o, n])
^  Exit: (277) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], 'Expression')
^  Exit: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', 'Expression')
^  Exit: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Expression')
^  Call: (275) [user] read_list(')', (0x55aefe44e2f0), _92450)
^  Unify: (275) [user] read_list(')', (0x55aefe44e2f0), _92450)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _96164)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (277) [system] ')'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space(')')
^  Unify: (277) [user] is_like_space(')')
   Call: (278) [system] char_type(')', 'white')
^  Redo: (277) [user] is_like_space(')')
^  Unify: (277) [user] is_like_space(')')
   Call: (278) [system] char_type(')', end_of_line)
^  Redo: (277) [user] is_like_space(')')
^  Unify: (277) [user] is_like_space(')')
   Call: (278) [system] char_type(')', space)
^  Redo: (277) [user] is_like_space(')')
^  Unify: (277) [user] is_like_space(')')
   Call: (278) [system] char_type(')', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _112948)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (276) [system] ')'=')'
   Exit: (276) [system] ')'=')'
   Call: (276) [system] get_char((0x55aefe44e2f0), _116738)
   Exit: (276) [system] get_char((0x55aefe44e2f0), ')')
   Call: (276) [system] _92450=[]
   Exit: (276) [system] []=[]
^  Exit: (275) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (275) [system] _6012=['Expression']
   Exit: (275) [system] ['Expression']=['Expression']
^  Exit: (274) [user] read_list(')', (0x55aefe44e2f0), ['Expression'])
   Call: (274) [system] _6006=['Expression', 'Expression']
   Exit: (274) [system] ['Expression', 'Expression']=['Expression', 'Expression']
^  Exit: (273) [user] read_list(')', (0x55aefe44e2f0), ['Expression', 'Expression'])
   Call: (273) [system] _6000=['Atom', 'Expression', 'Expression']
   Exit: (273) [system] ['Atom', 'Expression', 'Expression']=['Atom', 'Expression', 'Expression']
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Expression', 'Expression'])
   Call: (272) [system] _5992=[->, 'Atom', 'Expression', 'Expression']
   Exit: (272) [system] [->, 'Atom', 'Expression', 'Expression']=[->, 'Atom', 'Expression', 'Expression']
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [->, 'Atom', 'Expression', 'Expression'])
^  Exit: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), [->, 'Atom', 'Expression', 'Expression'])
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _133414)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _133414)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _137128)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (272) [system] ')'=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', 'white')
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', end_of_line)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', space)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _153912)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (271) [system] ')'=')'
   Exit: (271) [system] ')'=')'
   Call: (271) [system] get_char((0x55aefe44e2f0), _157702)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ')')
   Call: (271) [system] _133414=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (270) [system] _5988=[[->, 'Atom', 'Expression', 'Expression']]
   Exit: (270) [system] [[->, 'Atom', 'Expression', 'Expression']]=[[->, 'Atom', 'Expression', 'Expression']]
^  Exit: (269) [user] read_list(')', (0x55aefe44e2f0), [[->, 'Atom', 'Expression', 'Expression']])
   Call: (269) [system] _5982=['cons-atom', [->, 'Atom', 'Expression', 'Expression']]
   Exit: (269) [system] ['cons-atom', [->, 'Atom', 'Expression', 'Expression']]=['cons-atom', [->, 'Atom', 'Expression', 'Expression']]
^  Exit: (268) [user] read_list(')', (0x55aefe44e2f0), ['cons-atom', [->, 'Atom', 'Expression', 'Expression']])
   Call: (268) [system] _5942=[:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]
   Exit: (268) [system] [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]=[:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]
^  Exit: (267) [user] read_list(')', (0x55aefe44e2f0), [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Exit: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Exit: (265) [user] read_sexpr((0x55aefe44e2f0), [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Call: (265) [user] assertz(metta_file_comment(14, 0, 360, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], '$stream_position'(360, 14, 0, 360)))
^  Exit: (265) [user] assertz(metta_file_comment(14, 0, 360, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], '$stream_position'(360, 14, 0, 360)))
^  Exit: (263) [system] once(user:(read_position((0x55aefe44e2f0), 14, 0, 360, '$stream_position'(360, 14, 0, 360)), read_sexpr((0x55aefe44e2f0), [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]), assertz(metta_file_comment(14, 0, 360, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], '$stream_position'(360, 14, 0, 360)))))
   Call: (263) [system] fail
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Call: (263) [user] retract(metta_file_comment(_178076, _178078, _178080, _178082, _178084))
^  Exit: (263) [user] retract(metta_file_comment(14, 0, 360, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$stream_position'(360, 14, 0, 360)))
^  Call: (263) [user] trly(untyped_to_metta, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _5908)
^  Unify: (263) [user] trly(untyped_to_metta, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _5908)
^  Call: (264) [user] once(call(untyped_to_metta, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _181852))
^  Unify: (264) [system] once(user:call(untyped_to_metta, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _181852))
^  Call: (265) [user] call(untyped_to_metta, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _181852)
^  Unify: (265) [system] call(user:untyped_to_metta, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _181852)
^  Call: (266) [user] untyped_to_metta('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _181852)
^  Unify: (266) [user] untyped_to_metta('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _181852)
^  Call: (267) [user] must_det_ll(trly(mfix_vars1, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _187464))
^  Unify: (267) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _187464))
^  Call: (268) [user] once(user:trly(mfix_vars1, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _187464))
^  Unify: (268) [system] once(user:trly(mfix_vars1, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _187464))
^  Call: (269) [user] trly(mfix_vars1, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _187464)
^  Unify: (269) [user] trly(mfix_vars1, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _187464)
^  Call: (270) [user] once(call(mfix_vars1, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _193050))
^  Unify: (270) [system] once(user:call(mfix_vars1, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _193050))
^  Call: (271) [user] call(mfix_vars1, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _193050)
^  Unify: (271) [system] call(user:mfix_vars1, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _193050)
^  Call: (272) [user] mfix_vars1('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _193050)
^  Unify: (272) [user] mfix_vars1('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _193050)
   Call: (273) [system] var('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Redo: (272) [user] mfix_vars1('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _193050)
^  Unify: (272) [user] mfix_vars1('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$VAR'(_200510))
   Call: (273) [system] atom('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Redo: (272) [user] mfix_vars1('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _193050)
^  Unify: (272) [user] mfix_vars1('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _193050)
   Call: (273) [system] '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0)==true
^  Redo: (272) [user] mfix_vars1('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _193050)
^  Unify: (272) [user] mfix_vars1('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _193050)
   Call: (273) [system] '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0)==false
^  Redo: (272) [user] mfix_vars1('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _193050)
^  Unify: (272) [user] mfix_vars1('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _193050)
   Call: (273) [system] '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0)==[_209790, _209796]
^  Redo: (272) [user] mfix_vars1('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _193050)
^  Unify: (272) [user] mfix_vars1('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _193050)
   Call: (273) [system] is_list('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Redo: (272) [user] mfix_vars1('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _193050)
^  Unify: (272) [user] mfix_vars1('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _193050)
   Call: (273) [system] string('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Redo: (272) [user] mfix_vars1('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _193050)
^  Unify: (272) [user] mfix_vars1('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _193050)
   Call: (273) [system] compound('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
   Exit: (273) [system] compound('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
   Call: (273) [system] compound_name_arguments('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _219992, _219994)
   Exit: (273) [system] compound_name_arguments('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT', ["; We specialize them but leaving the old defs in case", 14, 0])
   Call: (273) [system] '$COMMENT'\=='$VAR'
   Exit: (273) [system] '$COMMENT'\=='$VAR'
^  Call: (273) [user] apply:maplist(mfix_vars1, ["; We specialize them but leaving the old defs in case", 14, 0], _223734)
^  Unify: (273) [apply] apply:maplist(user:mfix_vars1, ["; We specialize them but leaving the old defs in case", 14, 0], _223734)
   Call: (274) [apply] apply:maplist_(["; We specialize them but leaving the old defs in case", 14, 0], _223734, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_(["; We specialize them but leaving the old defs in case", 14, 0], [_226552|_226554], user:mfix_vars1)
^  Call: (275) [user] mfix_vars1("; We specialize them but leaving the old defs in case", _226552)
^  Unify: (275) [user] mfix_vars1("; We specialize them but leaving the old defs in case", _226552)
   Call: (276) [system] var("; We specialize them but leaving the old defs in case")
^  Redo: (275) [user] mfix_vars1("; We specialize them but leaving the old defs in case", _226552)
^  Unify: (275) [user] mfix_vars1("; We specialize them but leaving the old defs in case", '$VAR'(_231198))
   Call: (276) [system] atom("; We specialize them but leaving the old defs in case")
^  Redo: (275) [user] mfix_vars1("; We specialize them but leaving the old defs in case", _226552)
^  Unify: (275) [user] mfix_vars1("; We specialize them but leaving the old defs in case", _226552)
   Call: (276) [system] "; We specialize them but leaving the old defs in case"==true
^  Redo: (275) [user] mfix_vars1("; We specialize them but leaving the old defs in case", _226552)
^  Unify: (275) [user] mfix_vars1("; We specialize them but leaving the old defs in case", _226552)
   Call: (276) [system] "; We specialize them but leaving the old defs in case"==false
^  Redo: (275) [user] mfix_vars1("; We specialize them but leaving the old defs in case", _226552)
^  Unify: (275) [user] mfix_vars1("; We specialize them but leaving the old defs in case", _226552)
   Call: (276) [system] "; We specialize them but leaving the old defs in case"==[_240478, _240484]
^  Redo: (275) [user] mfix_vars1("; We specialize them but leaving the old defs in case", _226552)
^  Unify: (275) [user] mfix_vars1("; We specialize them but leaving the old defs in case", _226552)
   Call: (276) [system] is_list("; We specialize them but leaving the old defs in case")
^  Redo: (275) [user] mfix_vars1("; We specialize them but leaving the old defs in case", _226552)
^  Unify: (275) [user] mfix_vars1("; We specialize them but leaving the old defs in case", _226552)
   Call: (276) [system] string("; We specialize them but leaving the old defs in case")
   Exit: (276) [system] string("; We specialize them but leaving the old defs in case")
^  Call: (276) [user] string_to_syms
^  Unify: (276) [user] string_to_syms
   Call: (277) [system] fail
^  Redo: (275) [user] mfix_vars1("; We specialize them but leaving the old defs in case", _226552)
^  Unify: (275) [user] mfix_vars1("; We specialize them but leaving the old defs in case", _226552)
   Call: (276) [system] compound("; We specialize them but leaving the old defs in case")
^  Redo: (275) [user] mfix_vars1("; We specialize them but leaving the old defs in case", _226552)
^  Unify: (275) [user] mfix_vars1("; We specialize them but leaving the old defs in case", _226552)
^  Call: (276) [user] symbol("; We specialize them but leaving the old defs in case")
^  Unify: (276) [user] symbol("; We specialize them but leaving the old defs in case")
   Call: (277) [system] atom("; We specialize them but leaving the old defs in case")
   Fail: (277) [system] atom("; We specialize them but leaving the old defs in case")
^  Fail: (276) [user] symbol("; We specialize them but leaving the old defs in case")
^  Redo: (275) [user] mfix_vars1("; We specialize them but leaving the old defs in case", _226552)
   Call: (276) [system] "; We specialize them but leaving the old defs in case"=_226552
   Exit: (276) [system] "; We specialize them but leaving the old defs in case"="; We specialize them but leaving the old defs in case"
^  Exit: (275) [user] mfix_vars1("; We specialize them but leaving the old defs in case", "; We specialize them but leaving the old defs in case")
   Call: (275) [apply] apply:maplist_([14, 0], _226554, user:mfix_vars1)
   Unify: (275) [apply] apply:maplist_([14, 0], [_264550|_264552], user:mfix_vars1)
^  Call: (276) [user] mfix_vars1(14, _264550)
^  Unify: (276) [user] mfix_vars1(14, _264550)
   Call: (277) [system] var(14)
^  Redo: (276) [user] mfix_vars1(14, _264550)
^  Unify: (276) [user] mfix_vars1(14, '$VAR'(_269196))
   Call: (277) [system] atom(14)
^  Redo: (276) [user] mfix_vars1(14, _264550)
^  Unify: (276) [user] mfix_vars1(14, _264550)
   Call: (277) [system] 14==true
^  Redo: (276) [user] mfix_vars1(14, _264550)
^  Unify: (276) [user] mfix_vars1(14, _264550)
   Call: (277) [system] 14==false
^  Redo: (276) [user] mfix_vars1(14, _264550)
^  Unify: (276) [user] mfix_vars1(14, _264550)
   Call: (277) [system] 14==[_278476, _278482]
^  Redo: (276) [user] mfix_vars1(14, _264550)
^  Unify: (276) [user] mfix_vars1(14, _264550)
   Call: (277) [system] is_list(14)
^  Redo: (276) [user] mfix_vars1(14, _264550)
^  Unify: (276) [user] mfix_vars1(14, _264550)
   Call: (277) [system] string(14)
^  Redo: (276) [user] mfix_vars1(14, _264550)
^  Unify: (276) [user] mfix_vars1(14, _264550)
   Call: (277) [system] compound(14)
^  Redo: (276) [user] mfix_vars1(14, _264550)
^  Unify: (276) [user] mfix_vars1(14, _264550)
^  Call: (277) [user] symbol(14)
^  Unify: (277) [user] symbol(14)
   Call: (278) [system] atom(14)
   Fail: (278) [system] atom(14)
^  Fail: (277) [user] symbol(14)
^  Redo: (276) [user] mfix_vars1(14, _264550)
   Call: (277) [system] 14=_264550
   Exit: (277) [system] 14=14
^  Exit: (276) [user] mfix_vars1(14, 14)
   Call: (276) [apply] apply:maplist_([0], _264552, user:mfix_vars1)
   Unify: (276) [apply] apply:maplist_([0], [_298876|_298878], user:mfix_vars1)
^  Call: (277) [user] mfix_vars1(0, _298876)
^  Unify: (277) [user] mfix_vars1(0, _298876)
   Call: (278) [system] var(0)
^  Redo: (277) [user] mfix_vars1(0, _298876)
^  Unify: (277) [user] mfix_vars1(0, '$VAR'(_303522))
   Call: (278) [system] atom(0)
^  Redo: (277) [user] mfix_vars1(0, _298876)
^  Unify: (277) [user] mfix_vars1(0, _298876)
   Call: (278) [system] 0==true
^  Redo: (277) [user] mfix_vars1(0, _298876)
^  Unify: (277) [user] mfix_vars1(0, _298876)
   Call: (278) [system] 0==false
^  Redo: (277) [user] mfix_vars1(0, _298876)
^  Unify: (277) [user] mfix_vars1(0, _298876)
   Call: (278) [system] 0==[_312802, _312808]
^  Redo: (277) [user] mfix_vars1(0, _298876)
^  Unify: (277) [user] mfix_vars1(0, _298876)
   Call: (278) [system] is_list(0)
^  Redo: (277) [user] mfix_vars1(0, _298876)
^  Unify: (277) [user] mfix_vars1(0, _298876)
   Call: (278) [system] string(0)
^  Redo: (277) [user] mfix_vars1(0, _298876)
^  Unify: (277) [user] mfix_vars1(0, _298876)
   Call: (278) [system] compound(0)
^  Redo: (277) [user] mfix_vars1(0, _298876)
^  Unify: (277) [user] mfix_vars1(0, _298876)
^  Call: (278) [user] symbol(0)
^  Unify: (278) [user] symbol(0)
   Call: (279) [system] atom(0)
   Fail: (279) [system] atom(0)
^  Fail: (278) [user] symbol(0)
^  Redo: (277) [user] mfix_vars1(0, _298876)
   Call: (278) [system] 0=_298876
   Exit: (278) [system] 0=0
^  Exit: (277) [user] mfix_vars1(0, 0)
   Call: (277) [apply] apply:maplist_([], _298878, user:mfix_vars1)
   Unify: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (276) [apply] apply:maplist_([0], [0], user:mfix_vars1)
   Exit: (275) [apply] apply:maplist_([14, 0], [14, 0], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_(["; We specialize them but leaving the old defs in case", 14, 0], ["; We specialize them but leaving the old defs in case", 14, 0], user:mfix_vars1)
^  Exit: (273) [apply] apply:maplist(user:mfix_vars1, ["; We specialize them but leaving the old defs in case", 14, 0], ["; We specialize them but leaving the old defs in case", 14, 0])
   Call: (273) [system] compound_name_arguments(_193050, '$COMMENT', ["; We specialize them but leaving the old defs in case", 14, 0])
   Exit: (273) [system] compound_name_arguments('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT', ["; We specialize them but leaving the old defs in case", 14, 0])
^  Exit: (272) [user] mfix_vars1('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Exit: (271) [system] call(user:mfix_vars1, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Exit: (270) [system] once(user:call(mfix_vars1, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0)))
   Call: (270) [system] '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0)\=@='$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0)
^  Redo: (269) [user] trly(mfix_vars1, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _187464)
^  Unify: (269) [user] trly(mfix_vars1, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Exit: (269) [user] trly(mfix_vars1, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Exit: (268) [system] once(user:trly(mfix_vars1, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0)))
^  Exit: (267) [user] must_det_ll(user:trly(mfix_vars1, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0)))
^  Call: (267) [user] must_det_ll(trly(cons_to_c, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _349050))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _349050))
^  Call: (268) [user] once(user:trly(cons_to_c, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _349050))
^  Unify: (268) [system] once(user:trly(cons_to_c, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _349050))
^  Call: (269) [user] trly(cons_to_c, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _349050)
^  Unify: (269) [user] trly(cons_to_c, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _349050)
^  Call: (270) [user] once(call(cons_to_c, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _354636))
^  Unify: (270) [system] once(user:call(cons_to_c, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _354636))
^  Call: (271) [user] call(cons_to_c, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _354636)
^  Unify: (271) [system] call(user:cons_to_c, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _354636)
^  Call: (272) [user] cons_to_c('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _354636)
^  Unify: (272) [user] cons_to_c('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_c('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Exit: (271) [system] call(user:cons_to_c, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Exit: (270) [system] once(user:call(cons_to_c, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0)))
   Call: (270) [system] '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0)\=@='$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0)
^  Redo: (269) [user] trly(cons_to_c, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _349050)
^  Unify: (269) [user] trly(cons_to_c, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Exit: (269) [user] trly(cons_to_c, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Exit: (268) [system] once(user:trly(cons_to_c, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0)))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_c, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0)))
^  Call: (267) [user] must_det_ll(trly(cons_to_l, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _181852))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _181852))
^  Call: (268) [user] once(user:trly(cons_to_l, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _181852))
^  Unify: (268) [system] once(user:trly(cons_to_l, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _181852))
^  Call: (269) [user] trly(cons_to_l, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _181852)
^  Unify: (269) [user] trly(cons_to_l, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _181852)
^  Call: (270) [user] once(call(cons_to_l, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _376956))
^  Unify: (270) [system] once(user:call(cons_to_l, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _376956))
^  Call: (271) [user] call(cons_to_l, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _376956)
^  Unify: (271) [system] call(user:cons_to_l, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _376956)
^  Call: (272) [user] cons_to_l('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _376956)
^  Unify: (272) [user] cons_to_l('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_l('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Exit: (271) [system] call(user:cons_to_l, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Exit: (270) [system] once(user:call(cons_to_l, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0)))
   Call: (270) [system] '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0)\=@='$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0)
^  Redo: (269) [user] trly(cons_to_l, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _181852)
^  Unify: (269) [user] trly(cons_to_l, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Exit: (269) [user] trly(cons_to_l, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Exit: (268) [system] once(user:trly(cons_to_l, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0)))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_l, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0)))
^  Exit: (266) [user] untyped_to_metta('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Exit: (265) [system] call(user:untyped_to_metta, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Exit: (264) [system] once(user:call(untyped_to_metta, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0)))
   Call: (264) [system] '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0)\=@='$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0)
^  Redo: (263) [user] trly(untyped_to_metta, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _5908)
^  Unify: (263) [user] trly(untyped_to_metta, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Exit: (263) [user] trly(untyped_to_metta, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Exit: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
   Call: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))))
   Unify: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))))
   Exit: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))))
^  Exit: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Exit: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Call: (257) [user] subst_vars('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _411264, [], _411266)
^  Unify: (257) [user] subst_vars('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), [], [])
   Call: (258) [system] var('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _411264, [], _411266)
^  Unify: (257) [user] subst_vars('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _411264, [], _411266)
   Call: (258) [system] atom('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
^  Redo: (257) [user] subst_vars('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _411264, [], _411266)
^  Unify: (257) [user] subst_vars('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _411264, [], _411266)
   Call: (258) [system] compound('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
   Exit: (258) [system] compound('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0))
   Call: (258) [system] compound_name_arguments('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), _420580, _420582)
   Exit: (258) [system] compound_name_arguments('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT', ["; We specialize them but leaving the old defs in case", 14, 0])
^  Call: (258) [user] subst_vars(["; We specialize them but leaving the old defs in case", 14, 0], _422466, [], _411266)
^  Unify: (258) [user] subst_vars(["; We specialize them but leaving the old defs in case", 14, 0], ["; We specialize them but leaving the old defs in case", 14, 0], [], [])
   Call: (259) [system] var(["; We specialize them but leaving the old defs in case", 14, 0])
^  Redo: (258) [user] subst_vars(["; We specialize them but leaving the old defs in case", 14, 0], _422466, [], _411266)
^  Unify: (258) [user] subst_vars(["; We specialize them but leaving the old defs in case", 14, 0], [_426202|_426204], [], _411266)
^  Call: (259) [user] subst_vars("; We specialize them but leaving the old defs in case", _426202, [], _427142)
^  Unify: (259) [user] subst_vars("; We specialize them but leaving the old defs in case", "; We specialize them but leaving the old defs in case", [], [])
   Call: (260) [system] var("; We specialize them but leaving the old defs in case")
^  Redo: (259) [user] subst_vars("; We specialize them but leaving the old defs in case", _426202, [], _427142)
^  Unify: (259) [user] subst_vars("; We specialize them but leaving the old defs in case", _426202, [], _427142)
   Call: (260) [system] atom("; We specialize them but leaving the old defs in case")
^  Redo: (259) [user] subst_vars("; We specialize them but leaving the old defs in case", _426202, [], _427142)
^  Unify: (259) [user] subst_vars("; We specialize them but leaving the old defs in case", _426202, [], _427142)
   Call: (260) [system] compound("; We specialize them but leaving the old defs in case")
^  Redo: (259) [user] subst_vars("; We specialize them but leaving the old defs in case", _426202, [], _427142)
^  Unify: (259) [user] subst_vars("; We specialize them but leaving the old defs in case", "; We specialize them but leaving the old defs in case", [], [])
^  Exit: (259) [user] subst_vars("; We specialize them but leaving the old defs in case", "; We specialize them but leaving the old defs in case", [], [])
^  Call: (259) [user] subst_vars([14, 0], _426204, [], _411266)
^  Unify: (259) [user] subst_vars([14, 0], [14, 0], [], [])
   Call: (260) [system] var([14, 0])
^  Redo: (259) [user] subst_vars([14, 0], _426204, [], _411266)
^  Unify: (259) [user] subst_vars([14, 0], [_442074|_442076], [], _411266)
^  Call: (260) [user] subst_vars(14, _442074, [], _443014)
^  Unify: (260) [user] subst_vars(14, 14, [], [])
   Call: (261) [system] var(14)
^  Redo: (260) [user] subst_vars(14, _442074, [], _443014)
^  Unify: (260) [user] subst_vars(14, _442074, [], _443014)
   Call: (261) [system] atom(14)
^  Redo: (260) [user] subst_vars(14, _442074, [], _443014)
^  Unify: (260) [user] subst_vars(14, _442074, [], _443014)
   Call: (261) [system] compound(14)
^  Redo: (260) [user] subst_vars(14, _442074, [], _443014)
^  Unify: (260) [user] subst_vars(14, 14, [], [])
^  Exit: (260) [user] subst_vars(14, 14, [], [])
^  Call: (260) [user] subst_vars([0], _442076, [], _411266)
^  Unify: (260) [user] subst_vars([0], [0], [], [])
   Call: (261) [system] var([0])
^  Redo: (260) [user] subst_vars([0], _442076, [], _411266)
^  Unify: (260) [user] subst_vars([0], [_457946|_457948], [], _411266)
^  Call: (261) [user] subst_vars(0, _457946, [], _458886)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
   Call: (262) [system] var(0)
^  Redo: (261) [user] subst_vars(0, _457946, [], _458886)
^  Unify: (261) [user] subst_vars(0, _457946, [], _458886)
   Call: (262) [system] atom(0)
^  Redo: (261) [user] subst_vars(0, _457946, [], _458886)
^  Unify: (261) [user] subst_vars(0, _457946, [], _458886)
   Call: (262) [system] compound(0)
^  Redo: (261) [user] subst_vars(0, _457946, [], _458886)
^  Unify: (261) [user] subst_vars(0, 0, [], [])
^  Exit: (261) [user] subst_vars(0, 0, [], [])
^  Call: (261) [user] subst_vars([], _457948, [], _411266)
^  Unify: (261) [user] subst_vars([], [], [], [])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _457948, [], _411266)
^  Unify: (261) [user] subst_vars([], [], [], [])
^  Exit: (261) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([0], [0], [], [])
^  Exit: (259) [user] subst_vars([14, 0], [14, 0], [], [])
^  Exit: (258) [user] subst_vars(["; We specialize them but leaving the old defs in case", 14, 0], ["; We specialize them but leaving the old defs in case", 14, 0], [], [])
   Call: (258) [system] compound_name_arguments(_411264, '$COMMENT', ["; We specialize them but leaving the old defs in case", 14, 0])
   Exit: (258) [system] compound_name_arguments('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT', ["; We specialize them but leaving the old defs in case", 14, 0])
^  Exit: (257) [user] subst_vars('$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), [], [])
   Call: (257) [system] _481304=metta_file_buffer(+, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(359, 13, 33, 359))
   Exit: (257) [system] metta_file_buffer(+, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(359, 13, 33, 359))=metta_file_buffer(+, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(359, 13, 33, 359))
^  Call: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(359, 13, 33, 359)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(359, 13, 33, 359)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(359, 13, 33, 359))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(359, 13, 33, 359))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(359, 13, 33, 359))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, '$COMMENT'("; We specialize them but leaving the old defs in case", 14, 0), [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(359, 13, 33, 359))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (263) [user] retract(metta_file_comment(_5914, _5916, _5918, _5920, _5922))
^  Exit: (263) [user] retract(metta_file_comment(14, 0, 360, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], '$stream_position'(360, 14, 0, 360)))
^  Call: (263) [user] trly(untyped_to_metta, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _5908)
^  Call: (264) [user] once(call(untyped_to_metta, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _16290))
^  Unify: (264) [system] once(user:call(untyped_to_metta, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _16290))
^  Call: (265) [user] call(untyped_to_metta, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _16290)
^  Unify: (265) [system] call(user:untyped_to_metta, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _16290)
^  Call: (266) [user] untyped_to_metta([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _16290)
^  Unify: (266) [user] untyped_to_metta([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _16290)
^  Call: (267) [user] must_det_ll(trly(mfix_vars1, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _21902))
^  Unify: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _21902))
^  Call: (268) [user] once(user:trly(mfix_vars1, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _21902))
^  Unify: (268) [system] once(user:trly(mfix_vars1, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _21902))
^  Call: (269) [user] trly(mfix_vars1, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _21902)
^  Unify: (269) [user] trly(mfix_vars1, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _21902)
^  Call: (270) [user] once(call(mfix_vars1, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488))
^  Unify: (270) [system] once(user:call(mfix_vars1, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488))
^  Call: (271) [user] call(mfix_vars1, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488)
^  Unify: (271) [system] call(user:mfix_vars1, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488)
^  Call: (272) [user] mfix_vars1([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488)
^  Unify: (272) [user] mfix_vars1([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488)
   Call: (273) [system] var([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Redo: (272) [user] mfix_vars1([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488)
^  Unify: (272) [user] mfix_vars1([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], '$VAR'(_34948))
   Call: (273) [system] atom([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Redo: (272) [user] mfix_vars1([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488)
^  Unify: (272) [user] mfix_vars1([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488)
   Call: (273) [system] [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]==true
^  Redo: (272) [user] mfix_vars1([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488)
^  Unify: (272) [user] mfix_vars1([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488)
   Call: (273) [system] [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]==false
^  Redo: (272) [user] mfix_vars1([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488)
^  Unify: (272) [user] mfix_vars1([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488)
   Call: (273) [system] (:)=='['
^  Redo: (272) [user] mfix_vars1([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488)
^  Unify: (272) [user] mfix_vars1([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488)
   Call: (273) [system] (:)=='{'
^  Redo: (272) [user] mfix_vars1([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488)
^  Unify: (272) [user] mfix_vars1([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488)
   Call: (273) [system] is_list(['cons-atom', [->, 'Atom', 'Expression', 'Expression']])
   Exit: (273) [system] is_list(['cons-atom', [->, 'Atom', 'Expression', 'Expression']])
   Call: (273) [lists] lists:last(['cons-atom', [->, 'Atom', 'Expression', 'Expression']], _51642)
   Unify: (273) [lists] lists:last(['cons-atom', [->, 'Atom', 'Expression', 'Expression']], _51642)
   Call: (274) [lists] lists:last_([[->, 'Atom', 'Expression', 'Expression']], 'cons-atom', _51642)
   Unify: (274) [lists] lists:last_([[->, 'Atom', 'Expression', 'Expression']], 'cons-atom', _51642)
   Call: (275) [lists] lists:last_([], [->, 'Atom', 'Expression', 'Expression'], _51642)
   Unify: (275) [lists] lists:last_([], [->, 'Atom', 'Expression', 'Expression'], [->, 'Atom', 'Expression', 'Expression'])
   Exit: (275) [lists] lists:last_([], [->, 'Atom', 'Expression', 'Expression'], [->, 'Atom', 'Expression', 'Expression'])
   Exit: (274) [lists] lists:last_([[->, 'Atom', 'Expression', 'Expression']], 'cons-atom', [->, 'Atom', 'Expression', 'Expression'])
   Exit: (273) [lists] lists:last(['cons-atom', [->, 'Atom', 'Expression', 'Expression']], [->, 'Atom', 'Expression', 'Expression'])
   Call: (273) [system] [->, 'Atom', 'Expression', 'Expression']=='}'
^  Redo: (272) [user] mfix_vars1([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488)
^  Unify: (272) [user] mfix_vars1([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488)
   Call: (273) [system] [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]==[_62806, _62812]
^  Redo: (272) [user] mfix_vars1([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488)
^  Unify: (272) [user] mfix_vars1([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488)
   Call: (273) [system] fail
^  Redo: (272) [user] mfix_vars1([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488)
^  Unify: (272) [user] mfix_vars1([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488)
   Call: (273) [system] is_list([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
   Exit: (273) [system] is_list([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Call: (273) [user] apply:maplist(mfix_vars1, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488)
^  Unify: (273) [apply] apply:maplist(user:mfix_vars1, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488)
   Call: (274) [apply] apply:maplist_([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _27488, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [_73036|_73038], user:mfix_vars1)
^  Call: (275) [user] mfix_vars1(:, _73036)
^  Unify: (275) [user] mfix_vars1(:, _73036)
   Call: (276) [system] var(:)
^  Redo: (275) [user] mfix_vars1(:, _73036)
^  Unify: (275) [user] mfix_vars1(:, '$VAR'(_77682))
   Call: (276) [system] atom(:)
   Exit: (276) [system] atom(:)
^  Call: (276) [user] symbol_concat($, _80460, :)
^  Unify: (276) [user] symbol_concat($, _80460, :)
   Call: (277) [system] atom_concat($, _80460, :)
   Fail: (277) [system] atom_concat($, _80460, :)
^  Fail: (276) [user] symbol_concat($, _80460, :)
^  Redo: (275) [user] mfix_vars1(:, _73036)
^  Unify: (275) [user] mfix_vars1(:, _73036)
   Call: (276) [system] (:)==true
^  Redo: (275) [user] mfix_vars1(:, _73036)
^  Unify: (275) [user] mfix_vars1(:, _73036)
   Call: (276) [system] (:)==false
^  Redo: (275) [user] mfix_vars1(:, _73036)
^  Unify: (275) [user] mfix_vars1(:, _73036)
   Call: (276) [system] (:)==[_92548, _92554]
^  Redo: (275) [user] mfix_vars1(:, _73036)
^  Unify: (275) [user] mfix_vars1(:, _73036)
   Call: (276) [system] is_list(:)
^  Redo: (275) [user] mfix_vars1(:, _73036)
^  Unify: (275) [user] mfix_vars1(:, _73036)
   Call: (276) [system] string(:)
^  Redo: (275) [user] mfix_vars1(:, _73036)
^  Unify: (275) [user] mfix_vars1(:, _73036)
   Call: (276) [system] compound(:)
^  Redo: (275) [user] mfix_vars1(:, _73036)
^  Unify: (275) [user] mfix_vars1(:, _73036)
^  Call: (276) [user] symbol(:)
^  Unify: (276) [user] symbol(:)
   Call: (277) [system] atom(:)
   Exit: (277) [system] atom(:)
^  Exit: (276) [user] symbol(:)
^  Unify: (275) [user] mfix_vars1(:, :)
^  Exit: (275) [user] mfix_vars1(:, :)
   Call: (275) [apply] apply:maplist_(['cons-atom', [->, 'Atom', 'Expression', 'Expression']], _73038, user:mfix_vars1)
   Unify: (275) [apply] apply:maplist_(['cons-atom', [->, 'Atom', 'Expression', 'Expression']], [_111092|_111094], user:mfix_vars1)
^  Call: (276) [user] mfix_vars1('cons-atom', _111092)
^  Unify: (276) [user] mfix_vars1('cons-atom', _111092)
   Call: (277) [system] var('cons-atom')
^  Redo: (276) [user] mfix_vars1('cons-atom', _111092)
^  Unify: (276) [user] mfix_vars1('cons-atom', '$VAR'(_115738))
   Call: (277) [system] atom('cons-atom')
   Exit: (277) [system] atom('cons-atom')
^  Call: (277) [user] symbol_concat($, _118516, 'cons-atom')
^  Unify: (277) [user] symbol_concat($, _118516, 'cons-atom')
   Call: (278) [system] atom_concat($, _118516, 'cons-atom')
   Fail: (278) [system] atom_concat($, _118516, 'cons-atom')
^  Fail: (277) [user] symbol_concat($, _118516, 'cons-atom')
^  Redo: (276) [user] mfix_vars1('cons-atom', _111092)
^  Unify: (276) [user] mfix_vars1('cons-atom', _111092)
   Call: (277) [system] 'cons-atom'==true
^  Redo: (276) [user] mfix_vars1('cons-atom', _111092)
^  Unify: (276) [user] mfix_vars1('cons-atom', _111092)
   Call: (277) [system] 'cons-atom'==false
^  Redo: (276) [user] mfix_vars1('cons-atom', _111092)
^  Unify: (276) [user] mfix_vars1('cons-atom', _111092)
   Call: (277) [system] 'cons-atom'==[_130604, _130610]
^  Redo: (276) [user] mfix_vars1('cons-atom', _111092)
^  Unify: (276) [user] mfix_vars1('cons-atom', _111092)
   Call: (277) [system] is_list('cons-atom')
^  Redo: (276) [user] mfix_vars1('cons-atom', _111092)
^  Unify: (276) [user] mfix_vars1('cons-atom', _111092)
   Call: (277) [system] string('cons-atom')
^  Redo: (276) [user] mfix_vars1('cons-atom', _111092)
^  Unify: (276) [user] mfix_vars1('cons-atom', _111092)
   Call: (277) [system] compound('cons-atom')
^  Redo: (276) [user] mfix_vars1('cons-atom', _111092)
^  Unify: (276) [user] mfix_vars1('cons-atom', _111092)
^  Call: (277) [user] symbol('cons-atom')
^  Unify: (277) [user] symbol('cons-atom')
   Call: (278) [system] atom('cons-atom')
   Exit: (278) [system] atom('cons-atom')
^  Exit: (277) [user] symbol('cons-atom')
^  Unify: (276) [user] mfix_vars1('cons-atom', 'cons-atom')
^  Exit: (276) [user] mfix_vars1('cons-atom', 'cons-atom')
   Call: (276) [apply] apply:maplist_([[->, 'Atom', 'Expression', 'Expression']], _111094, user:mfix_vars1)
   Unify: (276) [apply] apply:maplist_([[->, 'Atom', 'Expression', 'Expression']], [_149148|_149150], user:mfix_vars1)
^  Call: (277) [user] mfix_vars1([->, 'Atom', 'Expression', 'Expression'], _149148)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Expression', 'Expression'], _149148)
   Call: (278) [system] var([->, 'Atom', 'Expression', 'Expression'])
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Expression', 'Expression'], _149148)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Expression', 'Expression'], '$VAR'(_153794))
   Call: (278) [system] atom([->, 'Atom', 'Expression', 'Expression'])
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Expression', 'Expression'], _149148)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Expression', 'Expression'], _149148)
   Call: (278) [system] [->, 'Atom', 'Expression', 'Expression']==true
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Expression', 'Expression'], _149148)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Expression', 'Expression'], _149148)
   Call: (278) [system] [->, 'Atom', 'Expression', 'Expression']==false
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Expression', 'Expression'], _149148)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Expression', 'Expression'], _149148)
   Call: (278) [system] (->)=='['
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Expression', 'Expression'], _149148)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Expression', 'Expression'], _149148)
   Call: (278) [system] (->)=='{'
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Expression', 'Expression'], _149148)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Expression', 'Expression'], _149148)
   Call: (278) [system] is_list(['Atom', 'Expression', 'Expression'])
   Exit: (278) [system] is_list(['Atom', 'Expression', 'Expression'])
   Call: (278) [lists] lists:last(['Atom', 'Expression', 'Expression'], _170488)
   Unify: (278) [lists] lists:last(['Atom', 'Expression', 'Expression'], _170488)
   Call: (279) [lists] lists:last_(['Expression', 'Expression'], 'Atom', _170488)
   Unify: (279) [lists] lists:last_(['Expression', 'Expression'], 'Atom', _170488)
   Call: (280) [lists] lists:last_(['Expression'], 'Expression', _170488)
   Unify: (280) [lists] lists:last_(['Expression'], 'Expression', _170488)
   Call: (281) [lists] lists:last_([], 'Expression', _170488)
   Unify: (281) [lists] lists:last_([], 'Expression', 'Expression')
   Exit: (281) [lists] lists:last_([], 'Expression', 'Expression')
   Exit: (280) [lists] lists:last_(['Expression'], 'Expression', 'Expression')
   Exit: (279) [lists] lists:last_(['Expression', 'Expression'], 'Atom', 'Expression')
   Exit: (278) [lists] lists:last(['Atom', 'Expression', 'Expression'], 'Expression')
   Call: (278) [system] 'Expression'=='}'
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Expression', 'Expression'], _149148)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Expression', 'Expression'], _149148)
   Call: (278) [system] [->, 'Atom', 'Expression', 'Expression']==[_184448, _184454]
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Expression', 'Expression'], _149148)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Expression', 'Expression'], _149148)
   Call: (278) [system] fail
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Expression', 'Expression'], _149148)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Expression', 'Expression'], _149148)
   Call: (278) [system] is_list([->, 'Atom', 'Expression', 'Expression'])
   Exit: (278) [system] is_list([->, 'Atom', 'Expression', 'Expression'])
^  Call: (278) [user] apply:maplist(mfix_vars1, [->, 'Atom', 'Expression', 'Expression'], _149148)
^  Unify: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Expression', 'Expression'], _149148)
   Call: (279) [apply] apply:maplist_([->, 'Atom', 'Expression', 'Expression'], _149148, user:mfix_vars1)
   Unify: (279) [apply] apply:maplist_([->, 'Atom', 'Expression', 'Expression'], [_194678|_194680], user:mfix_vars1)
^  Call: (280) [user] mfix_vars1(->, _194678)
^  Unify: (280) [user] mfix_vars1(->, _194678)
   Call: (281) [system] var(->)
^  Redo: (280) [user] mfix_vars1(->, _194678)
^  Unify: (280) [user] mfix_vars1(->, '$VAR'(_199324))
   Call: (281) [system] atom(->)
   Exit: (281) [system] atom(->)
^  Call: (281) [user] symbol_concat($, _202102, ->)
^  Unify: (281) [user] symbol_concat($, _202102, ->)
   Call: (282) [system] atom_concat($, _202102, ->)
   Fail: (282) [system] atom_concat($, _202102, ->)
^  Fail: (281) [user] symbol_concat($, _202102, ->)
^  Redo: (280) [user] mfix_vars1(->, _194678)
^  Unify: (280) [user] mfix_vars1(->, _194678)
   Call: (281) [system] (->)==true
^  Redo: (280) [user] mfix_vars1(->, _194678)
^  Unify: (280) [user] mfix_vars1(->, _194678)
   Call: (281) [system] (->)==false
^  Redo: (280) [user] mfix_vars1(->, _194678)
^  Unify: (280) [user] mfix_vars1(->, _194678)
   Call: (281) [system] (->)==[_214190, _214196]
^  Redo: (280) [user] mfix_vars1(->, _194678)
^  Unify: (280) [user] mfix_vars1(->, _194678)
   Call: (281) [system] is_list(->)
^  Redo: (280) [user] mfix_vars1(->, _194678)
^  Unify: (280) [user] mfix_vars1(->, _194678)
   Call: (281) [system] string(->)
^  Redo: (280) [user] mfix_vars1(->, _194678)
^  Unify: (280) [user] mfix_vars1(->, _194678)
   Call: (281) [system] compound(->)
^  Redo: (280) [user] mfix_vars1(->, _194678)
^  Unify: (280) [user] mfix_vars1(->, _194678)
^  Call: (281) [user] symbol(->)
^  Unify: (281) [user] symbol(->)
   Call: (282) [system] atom(->)
   Exit: (282) [system] atom(->)
^  Exit: (281) [user] symbol(->)
^  Unify: (280) [user] mfix_vars1(->, ->)
^  Exit: (280) [user] mfix_vars1(->, ->)
   Call: (280) [apply] apply:maplist_(['Atom', 'Expression', 'Expression'], _194680, user:mfix_vars1)
   Unify: (280) [apply] apply:maplist_(['Atom', 'Expression', 'Expression'], [_232734|_232736], user:mfix_vars1)
^  Call: (281) [user] mfix_vars1('Atom', _232734)
^  Unify: (281) [user] mfix_vars1('Atom', _232734)
   Call: (282) [system] var('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _232734)
^  Unify: (281) [user] mfix_vars1('Atom', '$VAR'(_237380))
   Call: (282) [system] atom('Atom')
   Exit: (282) [system] atom('Atom')
^  Call: (282) [user] symbol_concat($, _240158, 'Atom')
^  Unify: (282) [user] symbol_concat($, _240158, 'Atom')
   Call: (283) [system] atom_concat($, _240158, 'Atom')
   Fail: (283) [system] atom_concat($, _240158, 'Atom')
^  Fail: (282) [user] symbol_concat($, _240158, 'Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _232734)
^  Unify: (281) [user] mfix_vars1('Atom', _232734)
   Call: (282) [system] 'Atom'==true
^  Redo: (281) [user] mfix_vars1('Atom', _232734)
^  Unify: (281) [user] mfix_vars1('Atom', _232734)
   Call: (282) [system] 'Atom'==false
^  Redo: (281) [user] mfix_vars1('Atom', _232734)
^  Unify: (281) [user] mfix_vars1('Atom', _232734)
   Call: (282) [system] 'Atom'==[_252246, _252252]
^  Redo: (281) [user] mfix_vars1('Atom', _232734)
^  Unify: (281) [user] mfix_vars1('Atom', _232734)
   Call: (282) [system] is_list('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _232734)
^  Unify: (281) [user] mfix_vars1('Atom', _232734)
   Call: (282) [system] string('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _232734)
^  Unify: (281) [user] mfix_vars1('Atom', _232734)
   Call: (282) [system] compound('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _232734)
^  Unify: (281) [user] mfix_vars1('Atom', _232734)
^  Call: (282) [user] symbol('Atom')
^  Unify: (282) [user] symbol('Atom')
   Call: (283) [system] atom('Atom')
   Exit: (283) [system] atom('Atom')
^  Exit: (282) [user] symbol('Atom')
^  Unify: (281) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (281) [user] mfix_vars1('Atom', 'Atom')
   Call: (281) [apply] apply:maplist_(['Expression', 'Expression'], _232736, user:mfix_vars1)
   Unify: (281) [apply] apply:maplist_(['Expression', 'Expression'], [_270790|_270792], user:mfix_vars1)
^  Call: (282) [user] mfix_vars1('Expression', _270790)
^  Unify: (282) [user] mfix_vars1('Expression', _270790)
   Call: (283) [system] var('Expression')
^  Redo: (282) [user] mfix_vars1('Expression', _270790)
^  Unify: (282) [user] mfix_vars1('Expression', '$VAR'(_275436))
   Call: (283) [system] atom('Expression')
   Exit: (283) [system] atom('Expression')
^  Call: (283) [user] symbol_concat($, _278214, 'Expression')
^  Unify: (283) [user] symbol_concat($, _278214, 'Expression')
   Call: (284) [system] atom_concat($, _278214, 'Expression')
   Fail: (284) [system] atom_concat($, _278214, 'Expression')
^  Fail: (283) [user] symbol_concat($, _278214, 'Expression')
^  Redo: (282) [user] mfix_vars1('Expression', _270790)
^  Unify: (282) [user] mfix_vars1('Expression', _270790)
   Call: (283) [system] 'Expression'==true
^  Redo: (282) [user] mfix_vars1('Expression', _270790)
^  Unify: (282) [user] mfix_vars1('Expression', _270790)
   Call: (283) [system] 'Expression'==false
^  Redo: (282) [user] mfix_vars1('Expression', _270790)
^  Unify: (282) [user] mfix_vars1('Expression', _270790)
   Call: (283) [system] 'Expression'==[_290302, _290308]
^  Redo: (282) [user] mfix_vars1('Expression', _270790)
^  Unify: (282) [user] mfix_vars1('Expression', _270790)
   Call: (283) [system] is_list('Expression')
^  Redo: (282) [user] mfix_vars1('Expression', _270790)
^  Unify: (282) [user] mfix_vars1('Expression', _270790)
   Call: (283) [system] string('Expression')
^  Redo: (282) [user] mfix_vars1('Expression', _270790)
^  Unify: (282) [user] mfix_vars1('Expression', _270790)
   Call: (283) [system] compound('Expression')
^  Redo: (282) [user] mfix_vars1('Expression', _270790)
^  Unify: (282) [user] mfix_vars1('Expression', _270790)
^  Call: (283) [user] symbol('Expression')
^  Unify: (283) [user] symbol('Expression')
   Call: (284) [system] atom('Expression')
   Exit: (284) [system] atom('Expression')
^  Exit: (283) [user] symbol('Expression')
^  Unify: (282) [user] mfix_vars1('Expression', 'Expression')
^  Exit: (282) [user] mfix_vars1('Expression', 'Expression')
   Call: (282) [apply] apply:maplist_(['Expression'], _270792, user:mfix_vars1)
   Unify: (282) [apply] apply:maplist_(['Expression'], [_308846|_308848], user:mfix_vars1)
^  Call: (283) [user] mfix_vars1('Expression', _308846)
^  Unify: (283) [user] mfix_vars1('Expression', _308846)
   Call: (284) [system] var('Expression')
^  Redo: (283) [user] mfix_vars1('Expression', _308846)
^  Unify: (283) [user] mfix_vars1('Expression', '$VAR'(_313492))
   Call: (284) [system] atom('Expression')
   Exit: (284) [system] atom('Expression')
^  Call: (284) [user] symbol_concat($, _316270, 'Expression')
^  Unify: (284) [user] symbol_concat($, _316270, 'Expression')
   Call: (285) [system] atom_concat($, _316270, 'Expression')
   Fail: (285) [system] atom_concat($, _316270, 'Expression')
^  Fail: (284) [user] symbol_concat($, _316270, 'Expression')
^  Redo: (283) [user] mfix_vars1('Expression', _308846)
^  Unify: (283) [user] mfix_vars1('Expression', _308846)
   Call: (284) [system] 'Expression'==true
^  Redo: (283) [user] mfix_vars1('Expression', _308846)
^  Unify: (283) [user] mfix_vars1('Expression', _308846)
   Call: (284) [system] 'Expression'==false
^  Redo: (283) [user] mfix_vars1('Expression', _308846)
^  Unify: (283) [user] mfix_vars1('Expression', _308846)
   Call: (284) [system] 'Expression'==[_328358, _328364]
^  Redo: (283) [user] mfix_vars1('Expression', _308846)
^  Unify: (283) [user] mfix_vars1('Expression', _308846)
   Call: (284) [system] is_list('Expression')
^  Redo: (283) [user] mfix_vars1('Expression', _308846)
^  Unify: (283) [user] mfix_vars1('Expression', _308846)
   Call: (284) [system] string('Expression')
^  Redo: (283) [user] mfix_vars1('Expression', _308846)
^  Unify: (283) [user] mfix_vars1('Expression', _308846)
   Call: (284) [system] compound('Expression')
^  Redo: (283) [user] mfix_vars1('Expression', _308846)
^  Unify: (283) [user] mfix_vars1('Expression', _308846)
^  Call: (284) [user] symbol('Expression')
^  Unify: (284) [user] symbol('Expression')
   Call: (285) [system] atom('Expression')
   Exit: (285) [system] atom('Expression')
^  Exit: (284) [user] symbol('Expression')
^  Unify: (283) [user] mfix_vars1('Expression', 'Expression')
^  Exit: (283) [user] mfix_vars1('Expression', 'Expression')
   Call: (283) [apply] apply:maplist_([], _308848, user:mfix_vars1)
   Unify: (283) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (283) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (282) [apply] apply:maplist_(['Expression'], ['Expression'], user:mfix_vars1)
   Exit: (281) [apply] apply:maplist_(['Expression', 'Expression'], ['Expression', 'Expression'], user:mfix_vars1)
   Exit: (280) [apply] apply:maplist_(['Atom', 'Expression', 'Expression'], ['Atom', 'Expression', 'Expression'], user:mfix_vars1)
   Exit: (279) [apply] apply:maplist_([->, 'Atom', 'Expression', 'Expression'], [->, 'Atom', 'Expression', 'Expression'], user:mfix_vars1)
^  Exit: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Expression', 'Expression'], [->, 'Atom', 'Expression', 'Expression'])
^  Exit: (277) [user] mfix_vars1([->, 'Atom', 'Expression', 'Expression'], [->, 'Atom', 'Expression', 'Expression'])
   Call: (277) [apply] apply:maplist_([], _149150, user:mfix_vars1)
   Unify: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (276) [apply] apply:maplist_([[->, 'Atom', 'Expression', 'Expression']], [[->, 'Atom', 'Expression', 'Expression']], user:mfix_vars1)
   Exit: (275) [apply] apply:maplist_(['cons-atom', [->, 'Atom', 'Expression', 'Expression']], ['cons-atom', [->, 'Atom', 'Expression', 'Expression']], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], user:mfix_vars1)
^  Exit: (273) [apply] apply:maplist(user:mfix_vars1, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Exit: (272) [user] mfix_vars1([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Exit: (271) [system] call(user:mfix_vars1, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Exit: (270) [system] once(user:call(mfix_vars1, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]))
   Call: (270) [system] [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]\=@=[:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]
^  Redo: (269) [user] trly(mfix_vars1, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _21902)
^  Unify: (269) [user] trly(mfix_vars1, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Exit: (269) [user] trly(mfix_vars1, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Exit: (268) [system] once(user:trly(mfix_vars1, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]))
^  Exit: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_c, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _369268))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_c, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _369268))
^  Call: (268) [user] once(user:trly(cons_to_c, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _369268))
^  Unify: (268) [system] once(user:trly(cons_to_c, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _369268))
^  Call: (269) [user] trly(cons_to_c, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _369268)
^  Unify: (269) [user] trly(cons_to_c, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _369268)
^  Call: (270) [user] once(call(cons_to_c, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _374854))
^  Unify: (270) [system] once(user:call(cons_to_c, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _374854))
^  Call: (271) [user] call(cons_to_c, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _374854)
^  Unify: (271) [system] call(user:cons_to_c, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _374854)
^  Call: (272) [user] cons_to_c([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _374854)
^  Unify: (272) [user] cons_to_c([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_c([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Exit: (271) [system] call(user:cons_to_c, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Exit: (270) [system] once(user:call(cons_to_c, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]))
   Call: (270) [system] [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]\=@=[:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]
^  Redo: (269) [user] trly(cons_to_c, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _369268)
^  Unify: (269) [user] trly(cons_to_c, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Exit: (269) [user] trly(cons_to_c, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Exit: (268) [system] once(user:trly(cons_to_c, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_c, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_l, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _16290))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_l, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _16290))
^  Call: (268) [user] once(user:trly(cons_to_l, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _16290))
^  Unify: (268) [system] once(user:trly(cons_to_l, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _16290))
^  Call: (269) [user] trly(cons_to_l, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _16290)
^  Unify: (269) [user] trly(cons_to_l, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _16290)
^  Call: (270) [user] once(call(cons_to_l, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _397174))
^  Unify: (270) [system] once(user:call(cons_to_l, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _397174))
^  Call: (271) [user] call(cons_to_l, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _397174)
^  Unify: (271) [system] call(user:cons_to_l, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _397174)
^  Call: (272) [user] cons_to_l([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _397174)
^  Unify: (272) [user] cons_to_l([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_l([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Exit: (271) [system] call(user:cons_to_l, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Exit: (270) [system] once(user:call(cons_to_l, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]))
   Call: (270) [system] [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]\=@=[:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]
^  Redo: (269) [user] trly(cons_to_l, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _16290)
^  Unify: (269) [user] trly(cons_to_l, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Exit: (269) [user] trly(cons_to_l, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Exit: (268) [system] once(user:trly(cons_to_l, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_l, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]))
^  Exit: (266) [user] untyped_to_metta([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Exit: (265) [system] call(user:untyped_to_metta, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Exit: (264) [system] once(user:call(untyped_to_metta, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]))
   Call: (264) [system] [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]\=@=[:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']]
^  Redo: (263) [user] trly(untyped_to_metta, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Exit: (263) [user] trly(untyped_to_metta, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Exit: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
   Call: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])))
   Unify: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])))
   Exit: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])))
^  Exit: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Exit: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Call: (257) [user] subst_vars([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _431482, [], _431484)
^  Unify: (257) [user] subst_vars([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [], [])
   Call: (258) [system] var([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Redo: (257) [user] subst_vars([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], _431482, [], _431484)
^  Unify: (257) [user] subst_vars([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [_435220|_435222], [], _431484)
^  Call: (258) [user] subst_vars(:, _435220, [], _436160)
^  Unify: (258) [user] subst_vars(:, :, [], [])
   Call: (259) [system] var(:)
^  Redo: (258) [user] subst_vars(:, _435220, [], _436160)
^  Unify: (258) [user] subst_vars(:, _435220, [], _436160)
   Call: (259) [system] atom(:)
   Exit: (259) [system] atom(:)
^  Call: (259) [user] symbol_concat($, _442678, :)
^  Unify: (259) [user] symbol_concat($, _442678, :)
   Call: (260) [system] atom_concat($, _442678, :)
   Fail: (260) [system] atom_concat($, _442678, :)
^  Fail: (259) [user] symbol_concat($, _442678, :)
^  Redo: (258) [user] subst_vars(:, _435220, [], _436160)
^  Unify: (258) [user] subst_vars(:, _435220, [], _436160)
   Call: (259) [system] compound(:)
^  Redo: (258) [user] subst_vars(:, _435220, [], _436160)
^  Unify: (258) [user] subst_vars(:, :, [], [])
^  Exit: (258) [user] subst_vars(:, :, [], [])
^  Call: (258) [user] subst_vars(['cons-atom', [->, 'Atom', 'Expression', 'Expression']], _435222, [], _431484)
^  Unify: (258) [user] subst_vars(['cons-atom', [->, 'Atom', 'Expression', 'Expression']], ['cons-atom', [->, 'Atom', 'Expression', 'Expression']], [], [])
   Call: (259) [system] var(['cons-atom', [->, 'Atom', 'Expression', 'Expression']])
^  Redo: (258) [user] subst_vars(['cons-atom', [->, 'Atom', 'Expression', 'Expression']], _435222, [], _431484)
^  Unify: (258) [user] subst_vars(['cons-atom', [->, 'Atom', 'Expression', 'Expression']], [_456678|_456680], [], _431484)
^  Call: (259) [user] subst_vars('cons-atom', _456678, [], _457618)
^  Unify: (259) [user] subst_vars('cons-atom', 'cons-atom', [], [])
   Call: (260) [system] var('cons-atom')
^  Redo: (259) [user] subst_vars('cons-atom', _456678, [], _457618)
^  Unify: (259) [user] subst_vars('cons-atom', _456678, [], _457618)
   Call: (260) [system] atom('cons-atom')
   Exit: (260) [system] atom('cons-atom')
^  Call: (260) [user] symbol_concat($, _464136, 'cons-atom')
^  Unify: (260) [user] symbol_concat($, _464136, 'cons-atom')
   Call: (261) [system] atom_concat($, _464136, 'cons-atom')
   Fail: (261) [system] atom_concat($, _464136, 'cons-atom')
^  Fail: (260) [user] symbol_concat($, _464136, 'cons-atom')
^  Redo: (259) [user] subst_vars('cons-atom', _456678, [], _457618)
^  Unify: (259) [user] subst_vars('cons-atom', _456678, [], _457618)
   Call: (260) [system] compound('cons-atom')
^  Redo: (259) [user] subst_vars('cons-atom', _456678, [], _457618)
^  Unify: (259) [user] subst_vars('cons-atom', 'cons-atom', [], [])
^  Exit: (259) [user] subst_vars('cons-atom', 'cons-atom', [], [])
^  Call: (259) [user] subst_vars([[->, 'Atom', 'Expression', 'Expression']], _456680, [], _431484)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Expression', 'Expression']], [[->, 'Atom', 'Expression', 'Expression']], [], [])
   Call: (260) [system] var([[->, 'Atom', 'Expression', 'Expression']])
^  Redo: (259) [user] subst_vars([[->, 'Atom', 'Expression', 'Expression']], _456680, [], _431484)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Expression', 'Expression']], [_478136|_478138], [], _431484)
^  Call: (260) [user] subst_vars([->, 'Atom', 'Expression', 'Expression'], _478136, [], _479076)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Expression', 'Expression'], [->, 'Atom', 'Expression', 'Expression'], [], [])
   Call: (261) [system] var([->, 'Atom', 'Expression', 'Expression'])
^  Redo: (260) [user] subst_vars([->, 'Atom', 'Expression', 'Expression'], _478136, [], _479076)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Expression', 'Expression'], [_482812|_482814], [], _479076)
^  Call: (261) [user] subst_vars(->, _482812, [], _483752)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
   Call: (262) [system] var(->)
^  Redo: (261) [user] subst_vars(->, _482812, [], _483752)
^  Unify: (261) [user] subst_vars(->, _482812, [], _483752)
   Call: (262) [system] atom(->)
   Exit: (262) [system] atom(->)
^  Call: (262) [user] symbol_concat($, _490270, ->)
^  Unify: (262) [user] symbol_concat($, _490270, ->)
   Call: (263) [system] atom_concat($, _490270, ->)
   Fail: (263) [system] atom_concat($, _490270, ->)
^  Fail: (262) [user] symbol_concat($, _490270, ->)
^  Redo: (261) [user] subst_vars(->, _482812, [], _483752)
^  Unify: (261) [user] subst_vars(->, _482812, [], _483752)
   Call: (262) [system] compound(->)
^  Redo: (261) [user] subst_vars(->, _482812, [], _483752)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
^  Exit: (261) [user] subst_vars(->, ->, [], [])
^  Call: (261) [user] subst_vars(['Atom', 'Expression', 'Expression'], _482814, [], _479076)
^  Unify: (261) [user] subst_vars(['Atom', 'Expression', 'Expression'], ['Atom', 'Expression', 'Expression'], [], [])
   Call: (262) [system] var(['Atom', 'Expression', 'Expression'])
^  Redo: (261) [user] subst_vars(['Atom', 'Expression', 'Expression'], _482814, [], _479076)
^  Unify: (261) [user] subst_vars(['Atom', 'Expression', 'Expression'], [_504270|_504272], [], _479076)
^  Call: (262) [user] subst_vars('Atom', _504270, [], _505210)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (263) [system] var('Atom')
^  Redo: (262) [user] subst_vars('Atom', _504270, [], _505210)
^  Unify: (262) [user] subst_vars('Atom', _504270, [], _505210)
   Call: (263) [system] atom('Atom')
   Exit: (263) [system] atom('Atom')
^  Call: (263) [user] symbol_concat($, _511728, 'Atom')
^  Unify: (263) [user] symbol_concat($, _511728, 'Atom')
   Call: (264) [system] atom_concat($, _511728, 'Atom')
   Fail: (264) [system] atom_concat($, _511728, 'Atom')
^  Fail: (263) [user] symbol_concat($, _511728, 'Atom')
^  Redo: (262) [user] subst_vars('Atom', _504270, [], _505210)
^  Unify: (262) [user] subst_vars('Atom', _504270, [], _505210)
   Call: (263) [system] compound('Atom')
^  Redo: (262) [user] subst_vars('Atom', _504270, [], _505210)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (262) [user] subst_vars(['Expression', 'Expression'], _504272, [], _479076)
^  Unify: (262) [user] subst_vars(['Expression', 'Expression'], ['Expression', 'Expression'], [], [])
   Call: (263) [system] var(['Expression', 'Expression'])
^  Redo: (262) [user] subst_vars(['Expression', 'Expression'], _5992, [], _5978)
^  Unify: (262) [user] subst_vars(['Expression', 'Expression'], [_7718|_7720], [], _5978)
^  Call: (263) [user] subst_vars('Expression', _7718, [], _8658)
^  Unify: (263) [user] subst_vars('Expression', 'Expression', [], [])
   Call: (264) [system] var('Expression')
^  Redo: (263) [user] subst_vars('Expression', _7718, [], _8658)
^  Unify: (263) [user] subst_vars('Expression', _7718, [], _8658)
   Call: (264) [system] atom('Expression')
   Exit: (264) [system] atom('Expression')
^  Call: (264) [user] symbol_concat($, _15176, 'Expression')
^  Unify: (264) [user] symbol_concat($, _15176, 'Expression')
   Call: (265) [system] atom_concat($, _15176, 'Expression')
   Fail: (265) [system] atom_concat($, _15176, 'Expression')
^  Fail: (264) [user] symbol_concat($, _15176, 'Expression')
^  Redo: (263) [user] subst_vars('Expression', _7718, [], _8658)
^  Unify: (263) [user] subst_vars('Expression', _7718, [], _8658)
   Call: (264) [system] compound('Expression')
^  Redo: (263) [user] subst_vars('Expression', _7718, [], _8658)
^  Unify: (263) [user] subst_vars('Expression', 'Expression', [], [])
^  Exit: (263) [user] subst_vars('Expression', 'Expression', [], [])
^  Call: (263) [user] subst_vars(['Expression'], _7720, [], _5978)
^  Unify: (263) [user] subst_vars(['Expression'], ['Expression'], [], [])
   Call: (264) [system] var(['Expression'])
^  Redo: (263) [user] subst_vars(['Expression'], _7720, [], _5978)
^  Unify: (263) [user] subst_vars(['Expression'], [_29176|_29178], [], _5978)
^  Call: (264) [user] subst_vars('Expression', _29176, [], _30116)
^  Unify: (264) [user] subst_vars('Expression', 'Expression', [], [])
   Call: (265) [system] var('Expression')
^  Redo: (264) [user] subst_vars('Expression', _29176, [], _30116)
^  Unify: (264) [user] subst_vars('Expression', _29176, [], _30116)
   Call: (265) [system] atom('Expression')
   Exit: (265) [system] atom('Expression')
^  Call: (265) [user] symbol_concat($, _36634, 'Expression')
^  Unify: (265) [user] symbol_concat($, _36634, 'Expression')
   Call: (266) [system] atom_concat($, _36634, 'Expression')
   Fail: (266) [system] atom_concat($, _36634, 'Expression')
^  Fail: (265) [user] symbol_concat($, _36634, 'Expression')
^  Redo: (264) [user] subst_vars('Expression', _29176, [], _30116)
^  Unify: (264) [user] subst_vars('Expression', _29176, [], _30116)
   Call: (265) [system] compound('Expression')
^  Redo: (264) [user] subst_vars('Expression', _29176, [], _30116)
^  Unify: (264) [user] subst_vars('Expression', 'Expression', [], [])
^  Exit: (264) [user] subst_vars('Expression', 'Expression', [], [])
^  Call: (264) [user] subst_vars([], _29178, [], _5978)
^  Unify: (264) [user] subst_vars([], [], [], [])
   Call: (265) [system] var([])
^  Redo: (264) [user] subst_vars([], _29178, [], _5978)
^  Unify: (264) [user] subst_vars([], [], [], [])
^  Exit: (264) [user] subst_vars([], [], [], [])
^  Exit: (263) [user] subst_vars(['Expression'], ['Expression'], [], [])
^  Exit: (262) [user] subst_vars(['Expression', 'Expression'], ['Expression', 'Expression'], [], [])
^  Exit: (261) [user] subst_vars(['Atom', 'Expression', 'Expression'], ['Atom', 'Expression', 'Expression'], [], [])
^  Exit: (260) [user] subst_vars([->, 'Atom', 'Expression', 'Expression'], [->, 'Atom', 'Expression', 'Expression'], [], [])
^  Call: (260) [user] subst_vars([], _5976, [], _5954)
^  Unify: (260) [user] subst_vars([], [], [], [])
   Call: (261) [system] var([])
^  Redo: (260) [user] subst_vars([], _5976, [], _5954)
^  Unify: (260) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([], [], [], [])
^  Exit: (259) [user] subst_vars([[->, 'Atom', 'Expression', 'Expression']], [[->, 'Atom', 'Expression', 'Expression']], [], [])
^  Exit: (258) [user] subst_vars(['cons-atom', [->, 'Atom', 'Expression', 'Expression']], ['cons-atom', [->, 'Atom', 'Expression', 'Expression']], [], [])
^  Exit: (257) [user] subst_vars([:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [], [])
   Call: (257) [system] _64660=metta_file_buffer(+, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(359, 13, 33, 359))
   Exit: (257) [system] metta_file_buffer(+, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(359, 13, 33, 359))=metta_file_buffer(+, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(359, 13, 33, 359))
^  Call: (257) [user] assertz(metta_file_buffer(+, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(359, 13, 33, 359)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(359, 13, 33, 359)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(359, 13, 33, 359))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(359, 13, 33, 359))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(359, 13, 33, 359))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'cons-atom', [->, 'Atom', 'Expression', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(359, 13, 33, 359))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
   Redo: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _115454)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _116392))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _116392)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 459)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _115454)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _115454)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_115454))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_115454))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_115454))
   Exit: (259) [system] nonvar(position(_115454))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(459, 15, 45, 459)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(459, 15, 45, 459))
   Call: (257) [user] current_read_mode(file, _135872)
   Unify: (257) [user] current_read_mode(file, _135872)
   Call: (258) [system] nb_current(file_mode, _135872)
   Redo: (257) [user] current_read_mode(file, _135872)
   Call: (258) [system] _135872=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _142322)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _142322)
^  Call: (258) [user] clause(t_l:s_reader_info(_142322), _144268, _144190)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _142322)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _142322)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _142322)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _142322)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _142322)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _142322)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _142322)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _142322)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _158098)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (260) [system] char_type('\n', space)
   Exit: (260) [system] char_type('\n', space)
   Call: (260) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (260) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _142322)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _142322)
   Call: (261) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _142322)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _142322)
   Call: (261) [system] peek_char((0x55aefe44e2f0), _168304)
   Exit: (261) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (261) [system] char_type('(', space)
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _142322)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _142322)
^  Call: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (262) [system] string((0x55aefe44e2f0))
^  Redo: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _142322)
^  Unify: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _142322)
^  Call: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _142322)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _142322)
   Call: (263) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _142322)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _142322)
   Call: (263) [system] peek_char((0x55aefe44e2f0), _184058)
   Exit: (263) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (263) [system] char_type('(', space)
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _142322)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _142322)
   Call: (263) [system] _188700=(0x55aefe44e2f0)
   Exit: (263) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (263) [user] once((read_position((0x55aefe44e2f0), _190568, _190570, _190572, _190574), read_sexpr((0x55aefe44e2f0), _190586), assertz(metta_file_comment(_190568, _190570, _190572, _190586, _190574))))
^  Unify: (263) [system] once(user:(read_position((0x55aefe44e2f0), _190568, _190570, _190572, _190574), read_sexpr((0x55aefe44e2f0), _190586), assertz(metta_file_comment(_190568, _190570, _190572, _190586, _190574))))
^  Call: (265) [user] read_position((0x55aefe44e2f0), _190568, _190570, _190572, _190574)
^  Unify: (265) [user] read_position((0x55aefe44e2f0), _190568, _190570, _190572, _190574)
   Call: (266) [system] stream_property((0x55aefe44e2f0), position(_190574))
   Unify: (266) [system] stream_property((0x55aefe44e2f0), position(_190574))
   Call: (267) [system] nonvar((0x55aefe44e2f0))
   Exit: (267) [system] nonvar((0x55aefe44e2f0))
   Call: (267) [system] nonvar(position(_190574))
   Exit: (267) [system] nonvar(position(_190574))
   Exit: (266) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(460, 16, 0, 460)))
   Call: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(460, 16, 0, 460), _190568)
   Unify: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(460, 16, 0, 460), _190568)
   Call: (267) [system] nonvar(line_count)
   Exit: (267) [system] nonvar(line_count)
   Call: (267) [$syspreds] stream_position_field(line_count, _204556)
   Unify: (267) [$syspreds] stream_position_field(line_count, 2)
   Exit: (267) [$syspreds] stream_position_field(line_count, 2)
   Call: (267) [system] arg(2, '$stream_position'(460, 16, 0, 460), _190568)
   Exit: (267) [system] arg(2, '$stream_position'(460, 16, 0, 460), 16)
   Exit: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(460, 16, 0, 460), 16)
   Call: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(460, 16, 0, 460), _190570)
   Unify: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(460, 16, 0, 460), _190570)
   Call: (267) [system] nonvar(line_position)
   Exit: (267) [system] nonvar(line_position)
   Call: (267) [$syspreds] stream_position_field(line_position, _213850)
   Unify: (267) [$syspreds] stream_position_field(line_position, 3)
   Exit: (267) [$syspreds] stream_position_field(line_position, 3)
   Call: (267) [system] arg(3, '$stream_position'(460, 16, 0, 460), _190570)
   Exit: (267) [system] arg(3, '$stream_position'(460, 16, 0, 460), 0)
   Exit: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(460, 16, 0, 460), 0)
   Call: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(460, 16, 0, 460), _190572)
   Unify: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(460, 16, 0, 460), _190572)
   Call: (267) [system] nonvar(char_count)
   Exit: (267) [system] nonvar(char_count)
   Call: (267) [$syspreds] stream_position_field(char_count, _223144)
   Unify: (267) [$syspreds] stream_position_field(char_count, 1)
   Exit: (267) [$syspreds] stream_position_field(char_count, 1)
   Call: (267) [system] arg(1, '$stream_position'(460, 16, 0, 460), _190572)
   Exit: (267) [system] arg(1, '$stream_position'(460, 16, 0, 460), 460)
   Exit: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(460, 16, 0, 460), 460)
^  Exit: (265) [user] read_position((0x55aefe44e2f0), 16, 0, 460, '$stream_position'(460, 16, 0, 460))
^  Call: (265) [user] read_sexpr((0x55aefe44e2f0), _190586)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _190586)
   Call: (266) [system] string((0x55aefe44e2f0))
^  Redo: (265) [user] read_sexpr((0x55aefe44e2f0), _190586)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _190586)
^  Call: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _190586)
^  Unify: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _190586)
^  Call: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _238014)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (268) [system] '('=(;)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', 'white')
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', end_of_line)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', space)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', cntrl)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (267) [system] get_char((0x55aefe44e2f0), _254798)
   Exit: (267) [system] get_char((0x55aefe44e2f0), '(')
   Call: (267) [system] '('='('
   Exit: (267) [system] '('='('
^  Call: (267) [user] read_list(')', (0x55aefe44e2f0), _190586)
^  Unify: (267) [user] read_list(')', (0x55aefe44e2f0), _190586)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _262224)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, 'white')
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, end_of_line)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, space)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _279008)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), :)
   Call: (268) [system] (:)=')'
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _190586)
   Call: (268) [system] (:)=end_of_file
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _190586)
^  Call: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _284586)
^  Unify: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _284586)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _288300)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, 'white')
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, end_of_line)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, space)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, cntrl)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] get_char((0x55aefe44e2f0), _305084)
   Exit: (269) [system] get_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)='('
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _284586)
   Call: (269) [system] (:)='['
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _284586)
   Call: (269) [system] (:)='{'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _284586)
   Call: (269) [system] (:)='"'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _284586)
   Call: (269) [system] (:)=!
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _284586)
   Call: (269) [system] (:)='\''
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _284586)
   Call: (269) [system] (:)='`'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _284586)
   Call: (269) [system] (:)=end_of_file
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _284586)
^  Call: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _284586)
^  Unify: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _284586)
^  Call: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _323694)
^  Unify: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _323694)
   Call: (271) [system] peek_char((0x55aefe44e2f0), _325560)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] is_delimiter(' ')
^  Unify: (271) [user] is_delimiter(' ')
   Call: (272) [system] char_type(' ', space)
   Exit: (272) [system] char_type(' ', space)
^  Exit: (271) [user] is_delimiter(' ')
   Call: (271) [system] _323694=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (270) [user] classify_and_convert_charseq(:, [], _284586)
^  Unify: (270) [user] classify_and_convert_charseq(:, [], _284586)
^  Call: (272) [system] setup_call_cleanup('$notrace'(_336726, _336728), once(user:catch(read_from_chars([:], _284586), _336702, fail)), '$restore_trace'(_336726, _336728))
^  Unify: (272) [system] setup_call_cleanup(system:'$notrace'(_336726, _336728), system:once(user:catch(read_from_chars([:], _284586), _336702, fail)), system:'$restore_trace'(_336726, _336728))
^  Call: (273) [system] sig_atomic(system:'$notrace'(_336726, _336728))
^  Exit: (272) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([:], :), _336702, fail)), system:'$restore_trace'(3, -1))
   Call: (271) [system] atomic(:)
   Exit: (271) [system] atomic(:)
^  Exit: (270) [user] classify_and_convert_charseq(:, [], :)
^  Exit: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, :)
^  Exit: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), :)
^  Call: (268) [user] read_list(')', (0x55aefe44e2f0), _345164)
^  Unify: (268) [user] read_list(')', (0x55aefe44e2f0), _345164)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _348878)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (270) [system] ' '=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(' ')
^  Unify: (270) [user] is_like_space(' ')
   Call: (271) [system] char_type(' ', 'white')
   Exit: (271) [system] char_type(' ', 'white')
^  Exit: (270) [user] is_like_space(' ')
   Call: (270) [system] get_char((0x55aefe44e2f0), _357536)
   Exit: (270) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _361164)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), d)
   Call: (271) [system] d=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(d)
^  Unify: (271) [user] is_like_space(d)
   Call: (272) [system] char_type(d, 'white')
^  Redo: (271) [user] is_like_space(d)
^  Unify: (271) [user] is_like_space(d)
   Call: (272) [system] char_type(d, end_of_line)
^  Redo: (271) [user] is_like_space(d)
^  Unify: (271) [user] is_like_space(d)
   Call: (272) [system] char_type(d, space)
^  Redo: (271) [user] is_like_space(d)
^  Unify: (271) [user] is_like_space(d)
   Call: (272) [system] char_type(d, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _378872)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), d)
   Call: (269) [system] d=')'
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _345164)
   Call: (269) [system] d=end_of_file
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _345164)
^  Call: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _384450)
^  Unify: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _384450)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _388164)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), d)
   Call: (271) [system] d=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(d)
^  Unify: (271) [user] is_like_space(d)
   Call: (272) [system] char_type(d, 'white')
^  Redo: (271) [user] is_like_space(d)
^  Unify: (271) [user] is_like_space(d)
   Call: (272) [system] char_type(d, end_of_line)
^  Redo: (271) [user] is_like_space(d)
^  Unify: (271) [user] is_like_space(d)
   Call: (272) [system] char_type(d, space)
^  Redo: (271) [user] is_like_space(d)
^  Unify: (271) [user] is_like_space(d)
   Call: (272) [system] char_type(d, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] get_char((0x55aefe44e2f0), _404948)
   Exit: (270) [system] get_char((0x55aefe44e2f0), d)
   Call: (270) [system] d='('
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _384450)
   Call: (270) [system] d='['
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _384450)
   Call: (270) [system] d='{'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _384450)
   Call: (270) [system] d='"'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _384450)
   Call: (270) [system] d=!
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _384450)
   Call: (270) [system] d='\''
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _384450)
   Call: (270) [system] d='`'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _384450)
   Call: (270) [system] d=end_of_file
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _384450)
^  Call: (270) [user] read_symbolic(')', (0x55aefe44e2f0), d, _384450)
^  Unify: (270) [user] read_symbolic(')', (0x55aefe44e2f0), d, _384450)
^  Call: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _423558)
^  Unify: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _423558)
   Call: (272) [system] peek_char((0x55aefe44e2f0), _425424)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (272) [user] is_delimiter(e)
^  Unify: (272) [user] is_delimiter(e)
   Call: (273) [system] char_type(e, space)
^  Redo: (272) [user] is_delimiter(e)
   Call: (273) [system] arg(_431064, v('(', ')', end_of_file), e)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _423558)
   Call: (272) [system] ')'==e
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _423558)
   Call: (272) [system] get_char((0x55aefe44e2f0), e)
   Exit: (272) [system] get_char((0x55aefe44e2f0), e)
   Call: (272) [system] e=(\)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _423558)
^  Call: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _438430)
^  Unify: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _438430)
   Call: (273) [system] peek_char((0x55aefe44e2f0), _440296)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), c)
^  Call: (273) [user] is_delimiter(c)
^  Unify: (273) [user] is_delimiter(c)
   Call: (274) [system] char_type(c, space)
^  Redo: (273) [user] is_delimiter(c)
   Call: (274) [system] arg(_445936, v('(', ')', end_of_file), c)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _438430)
   Call: (273) [system] ')'==c
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _438430)
   Call: (273) [system] get_char((0x55aefe44e2f0), c)
   Exit: (273) [system] get_char((0x55aefe44e2f0), c)
   Call: (273) [system] c=(\)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _438430)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _453302)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _453302)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _455168)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (274) [user] is_delimiter(o)
^  Unify: (274) [user] is_delimiter(o)
   Call: (275) [system] char_type(o, space)
^  Redo: (274) [user] is_delimiter(o)
   Call: (275) [system] arg(_460808, v('(', ')', end_of_file), o)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _453302)
   Call: (274) [system] ')'==o
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _453302)
   Call: (274) [system] get_char((0x55aefe44e2f0), o)
   Exit: (274) [system] get_char((0x55aefe44e2f0), o)
   Call: (274) [system] o=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _453302)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _468174)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _468174)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _470040)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (275) [user] is_delimiter(n)
^  Unify: (275) [user] is_delimiter(n)
   Call: (276) [system] char_type(n, space)
^  Redo: (275) [user] is_delimiter(n)
   Call: (276) [system] arg(_475680, v('(', ')', end_of_file), n)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _468174)
   Call: (275) [system] ')'==n
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _468174)
   Call: (275) [system] get_char((0x55aefe44e2f0), n)
   Exit: (275) [system] get_char((0x55aefe44e2f0), n)
   Call: (275) [system] n=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _468174)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _483046)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _483046)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _484912)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (276) [user] is_delimiter(s)
^  Unify: (276) [user] is_delimiter(s)
   Call: (277) [system] char_type(s, space)
^  Redo: (276) [user] is_delimiter(s)
   Call: (277) [system] arg(_490552, v('(', ')', end_of_file), s)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _483046)
   Call: (276) [system] ')'==s
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _483046)
   Call: (276) [system] get_char((0x55aefe44e2f0), s)
   Exit: (276) [system] get_char((0x55aefe44e2f0), s)
   Call: (276) [system] s=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _483046)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _497918)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _497918)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _499784)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), -)
^  Call: (277) [user] is_delimiter(-)
^  Unify: (277) [user] is_delimiter(-)
   Call: (278) [system] char_type(-, space)
^  Redo: (277) [user] is_delimiter(-)
   Call: (278) [system] arg(_505424, v('(', ')', end_of_file), -)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _497918)
   Call: (277) [system] ')'==(-)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _497918)
   Call: (277) [system] get_char((0x55aefe44e2f0), -)
   Exit: (277) [system] get_char((0x55aefe44e2f0), -)
   Call: (277) [system] (-)=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _497918)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _512790)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _512790)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _514656)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (278) [user] is_delimiter(a)
^  Unify: (278) [user] is_delimiter(a)
   Call: (279) [system] char_type(a, space)
^  Redo: (278) [user] is_delimiter(a)
   Call: (279) [system] arg(_520296, v('(', ')', end_of_file), a)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _512790)
   Call: (278) [system] ')'==a
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _512790)
   Call: (278) [system] get_char((0x55aefe44e2f0), a)
   Exit: (278) [system] get_char((0x55aefe44e2f0), a)
   Call: (278) [system] a=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6014)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _9676)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _9676)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _11542)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (279) [user] is_delimiter(t)
^  Unify: (279) [user] is_delimiter(t)
   Call: (280) [system] char_type(t, space)
^  Redo: (279) [user] is_delimiter(t)
   Call: (280) [system] arg(_17182, v('(', ')', end_of_file), t)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _9676)
   Call: (279) [system] ')'==t
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _9676)
   Call: (279) [system] get_char((0x55aefe44e2f0), t)
   Exit: (279) [system] get_char((0x55aefe44e2f0), t)
   Call: (279) [system] t=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _9676)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _24548)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _24548)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _26414)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (280) [user] is_delimiter(o)
^  Unify: (280) [user] is_delimiter(o)
   Call: (281) [system] char_type(o, space)
^  Redo: (280) [user] is_delimiter(o)
   Call: (281) [system] arg(_32054, v('(', ')', end_of_file), o)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _24548)
   Call: (280) [system] ')'==o
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _24548)
   Call: (280) [system] get_char((0x55aefe44e2f0), o)
   Exit: (280) [system] get_char((0x55aefe44e2f0), o)
   Call: (280) [system] o=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _24548)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _39420)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _39420)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _41286)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (281) [user] is_delimiter(m)
^  Unify: (281) [user] is_delimiter(m)
   Call: (282) [system] char_type(m, space)
^  Redo: (281) [user] is_delimiter(m)
   Call: (282) [system] arg(_46926, v('(', ')', end_of_file), m)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _39420)
   Call: (281) [system] ')'==m
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _39420)
   Call: (281) [system] get_char((0x55aefe44e2f0), m)
   Exit: (281) [system] get_char((0x55aefe44e2f0), m)
   Call: (281) [system] m=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _39420)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _54292)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _54292)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _56158)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (282) [user] is_delimiter(' ')
^  Unify: (282) [user] is_delimiter(' ')
   Call: (283) [system] char_type(' ', space)
   Exit: (283) [system] char_type(' ', space)
^  Exit: (282) [user] is_delimiter(' ')
   Call: (282) [system] _54292=[]
   Exit: (282) [system] []=[]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (281) [system] _39420=[m]
   Exit: (281) [system] [m]=[m]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (280) [system] _24548=[o, m]
   Exit: (280) [system] [o, m]=[o, m]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (279) [system] _9676=[t, o, m]
   Exit: (279) [system] [t, o, m]=[t, o, m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
   Call: (278) [system] _6014=[a, t, o, m]
   Exit: (278) [system] [a, t, o, m]=[a, t, o, m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, t, o, m])
   Call: (277) [system] _6010=[-, a, t, o, m]
   Exit: (277) [system] [-, a, t, o, m]=[-, a, t, o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [-, a, t, o, m])
   Call: (276) [system] _6006=[s, -, a, t, o, m]
   Exit: (276) [system] [s, -, a, t, o, m]=[s, -, a, t, o, m]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, -, a, t, o, m])
   Call: (275) [system] _6002=[n, s, -, a, t, o, m]
   Exit: (275) [system] [n, s, -, a, t, o, m]=[n, s, -, a, t, o, m]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n, s, -, a, t, o, m])
   Call: (274) [system] _5998=[o, n, s, -, a, t, o, m]
   Exit: (274) [system] [o, n, s, -, a, t, o, m]=[o, n, s, -, a, t, o, m]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, n, s, -, a, t, o, m])
   Call: (273) [system] _5994=[c, o, n, s, -, a, t, o, m]
   Exit: (273) [system] [c, o, n, s, -, a, t, o, m]=[c, o, n, s, -, a, t, o, m]
^  Exit: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [c, o, n, s, -, a, t, o, m])
   Call: (272) [system] _5990=[e, c, o, n, s, -, a, t, o, m]
   Exit: (272) [system] [e, c, o, n, s, -, a, t, o, m]=[e, c, o, n, s, -, a, t, o, m]
^  Exit: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, c, o, n, s, -, a, t, o, m])
^  Call: (271) [user] classify_and_convert_charseq(d, [e, c, o, n, s, -, a, t, o, m], _5986)
^  Unify: (271) [user] classify_and_convert_charseq(d, [e, c, o, n, s, -, a, t, o, m], _5986)
^  Call: (273) [system] setup_call_cleanup('$notrace'(_95264, _95266), once(user:catch(read_from_chars([d, e, c, o, n, s, -, a, t, o, m], _5986), _95240, fail)), '$restore_trace'(_95264, _95266))
^  Unify: (273) [system] setup_call_cleanup(system:'$notrace'(_95264, _95266), system:once(user:catch(read_from_chars([d, e, c, o, n, s, -, a, t, o, m], _5986), _95240, fail)), system:'$restore_trace'(_95264, _95266))
^  Call: (274) [system] sig_atomic(system:'$notrace'(_95264, _95266))
^  Exit: (273) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([d, e, c, o, n, s, -, a, t, o, m], decons-atom), _95240, fail)), system:'$restore_trace'(3, -1))
   Call: (272) [system] atomic(decons-atom)
^  Redo: (271) [user] classify_and_convert_charseq(d, [e, c, o, n, s, -, a, t, o, m], _5986)
^  Unify: (271) [user] classify_and_convert_charseq(d, [e, c, o, n, s, -, a, t, o, m], _5986)
   Call: (272) [system] atom_chars(_5986, [d, e, c, o, n, s, -, a, t, o, m])
   Exit: (272) [system] atom_chars('decons-atom', [d, e, c, o, n, s, -, a, t, o, m])
^  Exit: (271) [user] classify_and_convert_charseq(d, [e, c, o, n, s, -, a, t, o, m], 'decons-atom')
^  Exit: (270) [user] read_symbolic(')', (0x55aefe44e2f0), d, 'decons-atom')
^  Exit: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), 'decons-atom')
^  Call: (269) [user] read_list(')', (0x55aefe44e2f0), _106510)
^  Unify: (269) [user] read_list(')', (0x55aefe44e2f0), _106510)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _110224)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (271) [system] ' '=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(' ')
^  Unify: (271) [user] is_like_space(' ')
   Call: (272) [system] char_type(' ', 'white')
   Exit: (272) [system] char_type(' ', 'white')
^  Exit: (271) [user] is_like_space(' ')
   Call: (271) [system] get_char((0x55aefe44e2f0), _118882)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _122510)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _140218)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (270) [system] '('=')'
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _106510)
   Call: (270) [system] '('=end_of_file
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _106510)
^  Call: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _145796)
^  Unify: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _145796)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _149510)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] get_char((0x55aefe44e2f0), _166294)
   Exit: (271) [system] get_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('='('
   Exit: (271) [system] '('='('
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _145796)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _145796)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _173720)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, 'white')
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, end_of_line)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, space)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _190504)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), -)
   Call: (272) [system] (-)=')'
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _145796)
   Call: (272) [system] (-)=end_of_file
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _145796)
^  Call: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _196082)
^  Unify: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _196082)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _199796)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, 'white')
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, end_of_line)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, space)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] get_char((0x55aefe44e2f0), _216580)
   Exit: (273) [system] get_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)='('
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _196082)
   Call: (273) [system] (-)='['
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _196082)
   Call: (273) [system] (-)='{'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _196082)
   Call: (273) [system] (-)='"'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _196082)
   Call: (273) [system] (-)=!
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _196082)
   Call: (273) [system] (-)='\''
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _196082)
   Call: (273) [system] (-)='`'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _196082)
   Call: (273) [system] (-)=end_of_file
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _196082)
^  Call: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _196082)
^  Unify: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _196082)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _235190)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _235190)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _237056)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), >)
^  Call: (275) [user] is_delimiter(>)
^  Unify: (275) [user] is_delimiter(>)
   Call: (276) [system] char_type(>, space)
^  Redo: (275) [user] is_delimiter(>)
   Call: (276) [system] arg(_242696, v('(', ')', end_of_file), >)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _235190)
   Call: (275) [system] ')'==(>)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _235190)
   Call: (275) [system] get_char((0x55aefe44e2f0), >)
   Exit: (275) [system] get_char((0x55aefe44e2f0), >)
   Call: (275) [system] (>)=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _235190)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _250062)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _250062)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _251928)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] is_delimiter(' ')
^  Unify: (276) [user] is_delimiter(' ')
   Call: (277) [system] char_type(' ', space)
   Exit: (277) [system] char_type(' ', space)
^  Exit: (276) [user] is_delimiter(' ')
   Call: (276) [system] _250062=[]
   Exit: (276) [system] []=[]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (275) [system] _235190=[>]
   Exit: (275) [system] [>]=[>]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [>])
^  Call: (274) [user] classify_and_convert_charseq(-, [>], _196082)
^  Unify: (274) [user] classify_and_convert_charseq(-, [>], _196082)
^  Call: (276) [system] setup_call_cleanup('$notrace'(_265888, _265890), once(user:catch(read_from_chars([-, >], _196082), _265864, fail)), '$restore_trace'(_265888, _265890))
^  Unify: (276) [system] setup_call_cleanup(system:'$notrace'(_265888, _265890), system:once(user:catch(read_from_chars([-, >], _196082), _265864, fail)), system:'$restore_trace'(_265888, _265890))
^  Call: (277) [system] sig_atomic(system:'$notrace'(_265888, _265890))
^  Exit: (276) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([-, >], ->), _265864, fail)), system:'$restore_trace'(3, -1))
   Call: (275) [system] atomic(->)
   Exit: (275) [system] atomic(->)
^  Exit: (274) [user] classify_and_convert_charseq(-, [>], ->)
^  Exit: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, ->)
^  Exit: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), ->)
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _274326)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _274326)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _278040)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (274) [system] ' '=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(' ')
^  Unify: (274) [user] is_like_space(' ')
   Call: (275) [system] char_type(' ', 'white')
   Exit: (275) [system] char_type(' ', 'white')
^  Exit: (274) [user] is_like_space(' ')
   Call: (274) [system] get_char((0x55aefe44e2f0), _286698)
   Exit: (274) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _290326)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (275) [system] 'E'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('E')
^  Unify: (275) [user] is_like_space('E')
   Call: (276) [system] char_type('E', 'white')
^  Redo: (275) [user] is_like_space('E')
^  Unify: (275) [user] is_like_space('E')
   Call: (276) [system] char_type('E', end_of_line)
^  Redo: (275) [user] is_like_space('E')
^  Unify: (275) [user] is_like_space('E')
   Call: (276) [system] char_type('E', space)
^  Redo: (275) [user] is_like_space('E')
^  Unify: (275) [user] is_like_space('E')
   Call: (276) [system] char_type('E', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _308034)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (273) [system] 'E'=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _274326)
   Call: (273) [system] 'E'=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _274326)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _313612)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _313612)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _317326)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (275) [system] 'E'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('E')
^  Unify: (275) [user] is_like_space('E')
   Call: (276) [system] char_type('E', 'white')
^  Redo: (275) [user] is_like_space('E')
^  Unify: (275) [user] is_like_space('E')
   Call: (276) [system] char_type('E', end_of_line)
^  Redo: (275) [user] is_like_space('E')
^  Unify: (275) [user] is_like_space('E')
   Call: (276) [system] char_type('E', space)
^  Redo: (275) [user] is_like_space('E')
^  Unify: (275) [user] is_like_space('E')
   Call: (276) [system] char_type('E', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _334110)
   Exit: (274) [system] get_char((0x55aefe44e2f0), 'E')
   Call: (274) [system] 'E'='('
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _313612)
   Call: (274) [system] 'E'='['
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _313612)
   Call: (274) [system] 'E'='{'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _313612)
   Call: (274) [system] 'E'='"'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _313612)
   Call: (274) [system] 'E'=!
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _313612)
   Call: (274) [system] 'E'='\''
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _313612)
   Call: (274) [system] 'E'='`'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _313612)
   Call: (274) [system] 'E'=end_of_file
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _313612)
^  Call: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', _313612)
^  Unify: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', _313612)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _352720)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _352720)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _354586)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), x)
^  Call: (276) [user] is_delimiter(x)
^  Unify: (276) [user] is_delimiter(x)
   Call: (277) [system] char_type(x, space)
^  Redo: (276) [user] is_delimiter(x)
   Call: (277) [system] arg(_360226, v('(', ')', end_of_file), x)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _352720)
   Call: (276) [system] ')'==x
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _352720)
   Call: (276) [system] get_char((0x55aefe44e2f0), x)
   Exit: (276) [system] get_char((0x55aefe44e2f0), x)
   Call: (276) [system] x=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _352720)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _367592)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _367592)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _369458)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (277) [user] is_delimiter(p)
^  Unify: (277) [user] is_delimiter(p)
   Call: (278) [system] char_type(p, space)
^  Redo: (277) [user] is_delimiter(p)
   Call: (278) [system] arg(_375098, v('(', ')', end_of_file), p)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _367592)
   Call: (277) [system] ')'==p
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _367592)
   Call: (277) [system] get_char((0x55aefe44e2f0), p)
   Exit: (277) [system] get_char((0x55aefe44e2f0), p)
   Call: (277) [system] p=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _367592)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _382464)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _382464)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _384330)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (278) [user] is_delimiter(r)
^  Unify: (278) [user] is_delimiter(r)
   Call: (279) [system] char_type(r, space)
^  Redo: (278) [user] is_delimiter(r)
   Call: (279) [system] arg(_389970, v('(', ')', end_of_file), r)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _382464)
   Call: (278) [system] ')'==r
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _382464)
   Call: (278) [system] get_char((0x55aefe44e2f0), r)
   Exit: (278) [system] get_char((0x55aefe44e2f0), r)
   Call: (278) [system] r=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _382464)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _397336)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _397336)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _399202)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (279) [user] is_delimiter(e)
^  Unify: (279) [user] is_delimiter(e)
   Call: (280) [system] char_type(e, space)
^  Redo: (279) [user] is_delimiter(e)
   Call: (280) [system] arg(_404842, v('(', ')', end_of_file), e)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _397336)
   Call: (279) [system] ')'==e
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _397336)
   Call: (279) [system] get_char((0x55aefe44e2f0), e)
   Exit: (279) [system] get_char((0x55aefe44e2f0), e)
   Call: (279) [system] e=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _397336)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _412208)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _412208)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _414074)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (280) [user] is_delimiter(s)
^  Unify: (280) [user] is_delimiter(s)
   Call: (281) [system] char_type(s, space)
^  Redo: (280) [user] is_delimiter(s)
   Call: (281) [system] arg(_419714, v('(', ')', end_of_file), s)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _412208)
   Call: (280) [system] ')'==s
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _412208)
   Call: (280) [system] get_char((0x55aefe44e2f0), s)
   Exit: (280) [system] get_char((0x55aefe44e2f0), s)
   Call: (280) [system] s=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _412208)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _427080)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _427080)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _428946)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (281) [user] is_delimiter(s)
^  Unify: (281) [user] is_delimiter(s)
   Call: (282) [system] char_type(s, space)
^  Redo: (281) [user] is_delimiter(s)
   Call: (282) [system] arg(_434586, v('(', ')', end_of_file), s)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _427080)
   Call: (281) [system] ')'==s
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _427080)
   Call: (281) [system] get_char((0x55aefe44e2f0), s)
   Exit: (281) [system] get_char((0x55aefe44e2f0), s)
   Call: (281) [system] s=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _427080)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _441952)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _441952)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _443818)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (282) [user] is_delimiter(i)
^  Unify: (282) [user] is_delimiter(i)
   Call: (283) [system] char_type(i, space)
^  Redo: (282) [user] is_delimiter(i)
   Call: (283) [system] arg(_449458, v('(', ')', end_of_file), i)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _441952)
   Call: (282) [system] ')'==i
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _441952)
   Call: (282) [system] get_char((0x55aefe44e2f0), i)
   Exit: (282) [system] get_char((0x55aefe44e2f0), i)
   Call: (282) [system] i=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _441952)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _456824)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _456824)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _458690)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (283) [user] is_delimiter(o)
^  Unify: (283) [user] is_delimiter(o)
   Call: (284) [system] char_type(o, space)
^  Redo: (283) [user] is_delimiter(o)
   Call: (284) [system] arg(_464330, v('(', ')', end_of_file), o)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _456824)
   Call: (283) [system] ')'==o
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _456824)
   Call: (283) [system] get_char((0x55aefe44e2f0), o)
   Exit: (283) [system] get_char((0x55aefe44e2f0), o)
   Call: (283) [system] o=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _456824)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _471696)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _471696)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _473562)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (284) [user] is_delimiter(n)
^  Unify: (284) [user] is_delimiter(n)
   Call: (285) [system] char_type(n, space)
^  Redo: (284) [user] is_delimiter(n)
   Call: (285) [system] arg(_479202, v('(', ')', end_of_file), n)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _471696)
   Call: (284) [system] ')'==n
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _471696)
   Call: (284) [system] get_char((0x55aefe44e2f0), n)
   Exit: (284) [system] get_char((0x55aefe44e2f0), n)
   Call: (284) [system] n=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _471696)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _486568)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _486568)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _488434)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (285) [user] is_delimiter(' ')
^  Unify: (285) [user] is_delimiter(' ')
   Call: (286) [system] char_type(' ', space)
   Exit: (286) [system] char_type(' ', space)
^  Exit: (285) [user] is_delimiter(' ')
   Call: (285) [system] _486568=[]
   Exit: (285) [system] []=[]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (284) [system] _471696=[n]
   Exit: (284) [system] [n]=[n]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (283) [system] _456824=[o, n]
   Exit: (283) [system] [o, n]=[o, n]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, n])
   Call: (282) [system] _441952=[i, o, n]
   Exit: (282) [system] [i, o, n]=[i, o, n]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, o, n])
   Call: (281) [system] _427080=[s, i, o, n]
   Exit: (281) [system] [s, i, o, n]=[s, i, o, n]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, i, o, n])
   Call: (280) [system] _412208=[s, s, i, o, n]
   Exit: (280) [system] [s, s, i, o, n]=[s, s, i, o, n]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, s, i, o, n])
   Call: (279) [system] _397336=[e, s, s, i, o, n]
   Exit: (279) [system] [e, s, s, i, o, n]=[e, s, s, i, o, n]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, s, s, i, o, n])
   Call: (278) [system] _382464=[r, e, s, s, i, o, n]
   Exit: (278) [system] [r, e, s, s, i, o, n]=[r, e, s, s, i, o, n]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, e, s, s, i, o, n])
   Call: (277) [system] _367592=[p, r, e, s, s, i, o, n]
   Exit: (277) [system] [p, r, e, s, s, i, o, n]=[p, r, e, s, s, i, o, n]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, r, e, s, s, i, o, n])
   Call: (276) [system] _352720=[x, p, r, e, s, s, i, o, n]
   Exit: (276) [system] [x, p, r, e, s, s, i, o, n]=[x, p, r, e, s, s, i, o, n]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [x, p, r, e, s, s, i, o, n])
^  Call: (275) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _313612)
^  Unify: (275) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _6004)
^  Call: (277) [system] setup_call_cleanup('$notrace'(_6842, _6844), once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _6004), _6818, fail)), '$restore_trace'(_6842, _6844))
^  Unify: (277) [system] setup_call_cleanup(system:'$notrace'(_6842, _6844), system:once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _6004), _6818, fail)), system:'$restore_trace'(_6842, _6844))
^  Call: (278) [system] sig_atomic(system:'$notrace'(_6842, _6844))
^  Exit: (277) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _6004), _6818, fail)), system:'$restore_trace'(3, -1))
   Call: (276) [system] atomic(_6004)
^  Redo: (275) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _6004)
^  Unify: (275) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _6004)
   Call: (276) [system] atom_chars(_6004, ['E', x, p, r, e, s, s, i, o, n])
   Exit: (276) [system] atom_chars('Expression', ['E', x, p, r, e, s, s, i, o, n])
^  Exit: (275) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], 'Expression')
^  Exit: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', 'Expression')
^  Exit: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Expression')
^  Call: (273) [user] read_list(')', (0x55aefe44e2f0), _18096)
^  Unify: (273) [user] read_list(')', (0x55aefe44e2f0), _18096)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _21810)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (275) [system] ' '=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(' ')
^  Unify: (275) [user] is_like_space(' ')
   Call: (276) [system] char_type(' ', 'white')
   Exit: (276) [system] char_type(' ', 'white')
^  Exit: (275) [user] is_like_space(' ')
   Call: (275) [system] get_char((0x55aefe44e2f0), _30468)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _34096)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (276) [system] 'E'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', 'white')
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', end_of_line)
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', space)
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _51804)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (274) [system] 'E'=')'
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _18096)
   Call: (274) [system] 'E'=end_of_file
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _18096)
^  Call: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _57382)
^  Unify: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _57382)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _61096)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (276) [system] 'E'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', 'white')
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', end_of_line)
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', space)
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] get_char((0x55aefe44e2f0), _77880)
   Exit: (275) [system] get_char((0x55aefe44e2f0), 'E')
   Call: (275) [system] 'E'='('
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _57382)
   Call: (275) [system] 'E'='['
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _57382)
   Call: (275) [system] 'E'='{'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _57382)
   Call: (275) [system] 'E'='"'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _57382)
   Call: (275) [system] 'E'=!
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _57382)
   Call: (275) [system] 'E'='\''
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _57382)
   Call: (275) [system] 'E'='`'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _57382)
   Call: (275) [system] 'E'=end_of_file
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _57382)
^  Call: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', _57382)
^  Unify: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', _57382)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _96490)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _96490)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _98356)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), x)
^  Call: (277) [user] is_delimiter(x)
^  Unify: (277) [user] is_delimiter(x)
   Call: (278) [system] char_type(x, space)
^  Redo: (277) [user] is_delimiter(x)
   Call: (278) [system] arg(_103996, v('(', ')', end_of_file), x)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _96490)
   Call: (277) [system] ')'==x
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _96490)
   Call: (277) [system] get_char((0x55aefe44e2f0), x)
   Exit: (277) [system] get_char((0x55aefe44e2f0), x)
   Call: (277) [system] x=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _96490)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _111362)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _111362)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _113228)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (278) [user] is_delimiter(p)
^  Unify: (278) [user] is_delimiter(p)
   Call: (279) [system] char_type(p, space)
^  Redo: (278) [user] is_delimiter(p)
   Call: (279) [system] arg(_118868, v('(', ')', end_of_file), p)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _111362)
   Call: (278) [system] ')'==p
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _111362)
   Call: (278) [system] get_char((0x55aefe44e2f0), p)
   Exit: (278) [system] get_char((0x55aefe44e2f0), p)
   Call: (278) [system] p=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _111362)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _126234)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _126234)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _128100)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (279) [user] is_delimiter(r)
^  Unify: (279) [user] is_delimiter(r)
   Call: (280) [system] char_type(r, space)
^  Redo: (279) [user] is_delimiter(r)
   Call: (280) [system] arg(_133740, v('(', ')', end_of_file), r)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _126234)
   Call: (279) [system] ')'==r
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _126234)
   Call: (279) [system] get_char((0x55aefe44e2f0), r)
   Exit: (279) [system] get_char((0x55aefe44e2f0), r)
   Call: (279) [system] r=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _126234)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _141106)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _141106)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _142972)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (280) [user] is_delimiter(e)
^  Unify: (280) [user] is_delimiter(e)
   Call: (281) [system] char_type(e, space)
^  Redo: (280) [user] is_delimiter(e)
   Call: (281) [system] arg(_148612, v('(', ')', end_of_file), e)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _141106)
   Call: (280) [system] ')'==e
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _141106)
   Call: (280) [system] get_char((0x55aefe44e2f0), e)
   Exit: (280) [system] get_char((0x55aefe44e2f0), e)
   Call: (280) [system] e=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _141106)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _155978)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _155978)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _157844)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (281) [user] is_delimiter(s)
^  Unify: (281) [user] is_delimiter(s)
   Call: (282) [system] char_type(s, space)
^  Redo: (281) [user] is_delimiter(s)
   Call: (282) [system] arg(_163484, v('(', ')', end_of_file), s)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _155978)
   Call: (281) [system] ')'==s
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _155978)
   Call: (281) [system] get_char((0x55aefe44e2f0), s)
   Exit: (281) [system] get_char((0x55aefe44e2f0), s)
   Call: (281) [system] s=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _155978)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _170850)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _170850)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _172716)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (282) [user] is_delimiter(s)
^  Unify: (282) [user] is_delimiter(s)
   Call: (283) [system] char_type(s, space)
^  Redo: (282) [user] is_delimiter(s)
   Call: (283) [system] arg(_178356, v('(', ')', end_of_file), s)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _170850)
   Call: (282) [system] ')'==s
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _170850)
   Call: (282) [system] get_char((0x55aefe44e2f0), s)
   Exit: (282) [system] get_char((0x55aefe44e2f0), s)
   Call: (282) [system] s=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _170850)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _185722)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _185722)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _187588)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (283) [user] is_delimiter(i)
^  Unify: (283) [user] is_delimiter(i)
   Call: (284) [system] char_type(i, space)
^  Redo: (283) [user] is_delimiter(i)
   Call: (284) [system] arg(_193228, v('(', ')', end_of_file), i)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _185722)
   Call: (283) [system] ')'==i
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _185722)
   Call: (283) [system] get_char((0x55aefe44e2f0), i)
   Exit: (283) [system] get_char((0x55aefe44e2f0), i)
   Call: (283) [system] i=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _185722)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _200594)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _200594)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _202460)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (284) [user] is_delimiter(o)
^  Unify: (284) [user] is_delimiter(o)
   Call: (285) [system] char_type(o, space)
^  Redo: (284) [user] is_delimiter(o)
   Call: (285) [system] arg(_208100, v('(', ')', end_of_file), o)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _200594)
   Call: (284) [system] ')'==o
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _200594)
   Call: (284) [system] get_char((0x55aefe44e2f0), o)
   Exit: (284) [system] get_char((0x55aefe44e2f0), o)
   Call: (284) [system] o=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _200594)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _215466)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _215466)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _217332)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (285) [user] is_delimiter(n)
^  Unify: (285) [user] is_delimiter(n)
   Call: (286) [system] char_type(n, space)
^  Redo: (285) [user] is_delimiter(n)
   Call: (286) [system] arg(_222972, v('(', ')', end_of_file), n)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _215466)
   Call: (285) [system] ')'==n
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _215466)
   Call: (285) [system] get_char((0x55aefe44e2f0), n)
   Exit: (285) [system] get_char((0x55aefe44e2f0), n)
   Call: (285) [system] n=(\)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _215466)
^  Call: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _230338)
^  Unify: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _230338)
   Call: (286) [system] peek_char((0x55aefe44e2f0), _232204)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (286) [user] is_delimiter(')')
^  Unify: (286) [user] is_delimiter(')')
   Call: (287) [system] char_type(')', space)
^  Redo: (286) [user] is_delimiter(')')
   Call: (287) [system] arg(_237844, v('(', ')', end_of_file), ')')
   Exit: (287) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (286) [user] is_delimiter(')')
   Call: (286) [system] _230338=[]
   Exit: (286) [system] []=[]
^  Exit: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (285) [system] _215466=[n]
   Exit: (285) [system] [n]=[n]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (284) [system] _200594=[o, n]
   Exit: (284) [system] [o, n]=[o, n]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, n])
   Call: (283) [system] _185722=[i, o, n]
   Exit: (283) [system] [i, o, n]=[i, o, n]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, o, n])
   Call: (282) [system] _170850=[s, i, o, n]
   Exit: (282) [system] [s, i, o, n]=[s, i, o, n]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, i, o, n])
   Call: (281) [system] _155978=[s, s, i, o, n]
   Exit: (281) [system] [s, s, i, o, n]=[s, s, i, o, n]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, s, i, o, n])
   Call: (280) [system] _141106=[e, s, s, i, o, n]
   Exit: (280) [system] [e, s, s, i, o, n]=[e, s, s, i, o, n]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, s, s, i, o, n])
   Call: (279) [system] _126234=[r, e, s, s, i, o, n]
   Exit: (279) [system] [r, e, s, s, i, o, n]=[r, e, s, s, i, o, n]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, e, s, s, i, o, n])
   Call: (278) [system] _111362=[p, r, e, s, s, i, o, n]
   Exit: (278) [system] [p, r, e, s, s, i, o, n]=[p, r, e, s, s, i, o, n]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, r, e, s, s, i, o, n])
   Call: (277) [system] _96490=[x, p, r, e, s, s, i, o, n]
   Exit: (277) [system] [x, p, r, e, s, s, i, o, n]=[x, p, r, e, s, s, i, o, n]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [x, p, r, e, s, s, i, o, n])
^  Call: (276) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _57382)
^  Unify: (276) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _57382)
^  Call: (278) [system] setup_call_cleanup('$notrace'(_270384, _270386), once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _57382), _270360, fail)), '$restore_trace'(_270384, _270386))
^  Unify: (278) [system] setup_call_cleanup(system:'$notrace'(_270384, _270386), system:once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _57382), _270360, fail)), system:'$restore_trace'(_270384, _270386))
^  Call: (279) [system] sig_atomic(system:'$notrace'(_270384, _270386))
^  Exit: (278) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _57382), _270360, fail)), system:'$restore_trace'(3, -1))
   Call: (277) [system] atomic(_57382)
^  Redo: (276) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _57382)
^  Unify: (276) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _57382)
   Call: (277) [system] atom_chars(_57382, ['E', x, p, r, e, s, s, i, o, n])
   Exit: (277) [system] atom_chars('Expression', ['E', x, p, r, e, s, s, i, o, n])
^  Exit: (276) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], 'Expression')
^  Exit: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', 'Expression')
^  Exit: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Expression')
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _281638)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _281638)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _285352)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (276) [system] ')'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', 'white')
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', end_of_line)
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', space)
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _302136)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (275) [system] ')'=')'
   Exit: (275) [system] ')'=')'
   Call: (275) [system] get_char((0x55aefe44e2f0), _305926)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ')')
   Call: (275) [system] _281638=[]
   Exit: (275) [system] []=[]
^  Exit: (274) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (274) [system] _18096=['Expression']
   Exit: (274) [system] ['Expression']=['Expression']
^  Exit: (273) [user] read_list(')', (0x55aefe44e2f0), ['Expression'])
   Call: (273) [system] _6000=['Expression', 'Expression']
   Exit: (273) [system] ['Expression', 'Expression']=['Expression', 'Expression']
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), ['Expression', 'Expression'])
   Call: (272) [system] _5992=[->, 'Expression', 'Expression']
   Exit: (272) [system] [->, 'Expression', 'Expression']=[->, 'Expression', 'Expression']
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [->, 'Expression', 'Expression'])
^  Exit: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), [->, 'Expression', 'Expression'])
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _319808)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _319808)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _323522)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (272) [system] ')'=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', 'white')
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', end_of_line)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', space)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _340306)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (271) [system] ')'=')'
   Exit: (271) [system] ')'=')'
   Call: (271) [system] get_char((0x55aefe44e2f0), _344096)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ')')
   Call: (271) [system] _319808=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (270) [system] _5988=[[->, 'Expression', 'Expression']]
   Exit: (270) [system] [[->, 'Expression', 'Expression']]=[[->, 'Expression', 'Expression']]
^  Exit: (269) [user] read_list(')', (0x55aefe44e2f0), [[->, 'Expression', 'Expression']])
   Call: (269) [system] _5982=['decons-atom', [->, 'Expression', 'Expression']]
   Exit: (269) [system] ['decons-atom', [->, 'Expression', 'Expression']]=['decons-atom', [->, 'Expression', 'Expression']]
^  Exit: (268) [user] read_list(')', (0x55aefe44e2f0), ['decons-atom', [->, 'Expression', 'Expression']])
   Call: (268) [system] _5942=[:, 'decons-atom', [->, 'Expression', 'Expression']]
   Exit: (268) [system] [:, 'decons-atom', [->, 'Expression', 'Expression']]=[:, 'decons-atom', [->, 'Expression', 'Expression']]
^  Exit: (267) [user] read_list(')', (0x55aefe44e2f0), [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Exit: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Exit: (265) [user] read_sexpr((0x55aefe44e2f0), [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Call: (265) [user] assertz(metta_file_comment(16, 0, 460, [:, 'decons-atom', [->, 'Expression', 'Expression']], '$stream_position'(460, 16, 0, 460)))
^  Exit: (265) [user] assertz(metta_file_comment(16, 0, 460, [:, 'decons-atom', [->, 'Expression', 'Expression']], '$stream_position'(460, 16, 0, 460)))
^  Exit: (263) [system] once(user:(read_position((0x55aefe44e2f0), 16, 0, 460, '$stream_position'(460, 16, 0, 460)), read_sexpr((0x55aefe44e2f0), [:, 'decons-atom', [->, 'Expression', 'Expression']]), assertz(metta_file_comment(16, 0, 460, [:, 'decons-atom', [->, 'Expression', 'Expression']], '$stream_position'(460, 16, 0, 460)))))
   Call: (263) [system] fail
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Call: (263) [user] retract(metta_file_comment(_364470, _364472, _364474, _364476, _364478))
^  Exit: (263) [user] retract(metta_file_comment(16, 0, 460, [:, 'decons-atom', [->, 'Expression', 'Expression']], '$stream_position'(460, 16, 0, 460)))
^  Call: (263) [user] trly(untyped_to_metta, [:, 'decons-atom', [->, 'Expression', 'Expression']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, 'decons-atom', [->, 'Expression', 'Expression']], _5908)
^  Call: (264) [user] once(call(untyped_to_metta, [:, 'decons-atom', [->, 'Expression', 'Expression']], _368256))
^  Unify: (264) [system] once(user:call(untyped_to_metta, [:, 'decons-atom', [->, 'Expression', 'Expression']], _368256))
^  Call: (265) [user] call(untyped_to_metta, [:, 'decons-atom', [->, 'Expression', 'Expression']], _368256)
^  Unify: (265) [system] call(user:untyped_to_metta, [:, 'decons-atom', [->, 'Expression', 'Expression']], _368256)
^  Call: (266) [user] untyped_to_metta([:, 'decons-atom', [->, 'Expression', 'Expression']], _368256)
^  Unify: (266) [user] untyped_to_metta([:, 'decons-atom', [->, 'Expression', 'Expression']], _368256)
^  Call: (267) [user] must_det_ll(trly(mfix_vars1, [:, 'decons-atom', [->, 'Expression', 'Expression']], _373868))
^  Unify: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, 'decons-atom', [->, 'Expression', 'Expression']], _373868))
^  Call: (268) [user] once(user:trly(mfix_vars1, [:, 'decons-atom', [->, 'Expression', 'Expression']], _373868))
^  Unify: (268) [system] once(user:trly(mfix_vars1, [:, 'decons-atom', [->, 'Expression', 'Expression']], _373868))
^  Call: (269) [user] trly(mfix_vars1, [:, 'decons-atom', [->, 'Expression', 'Expression']], _373868)
^  Unify: (269) [user] trly(mfix_vars1, [:, 'decons-atom', [->, 'Expression', 'Expression']], _373868)
^  Call: (270) [user] once(call(mfix_vars1, [:, 'decons-atom', [->, 'Expression', 'Expression']], _379454))
^  Unify: (270) [system] once(user:call(mfix_vars1, [:, 'decons-atom', [->, 'Expression', 'Expression']], _379454))
^  Call: (271) [user] call(mfix_vars1, [:, 'decons-atom', [->, 'Expression', 'Expression']], _379454)
^  Unify: (271) [system] call(user:mfix_vars1, [:, 'decons-atom', [->, 'Expression', 'Expression']], _379454)
^  Call: (272) [user] mfix_vars1([:, 'decons-atom', [->, 'Expression', 'Expression']], _379454)
^  Unify: (272) [user] mfix_vars1([:, 'decons-atom', [->, 'Expression', 'Expression']], _379454)
   Call: (273) [system] var([:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Redo: (272) [user] mfix_vars1([:, 'decons-atom', [->, 'Expression', 'Expression']], _379454)
^  Unify: (272) [user] mfix_vars1([:, 'decons-atom', [->, 'Expression', 'Expression']], '$VAR'(_386914))
   Call: (273) [system] atom([:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Redo: (272) [user] mfix_vars1([:, 'decons-atom', [->, 'Expression', 'Expression']], _379454)
^  Unify: (272) [user] mfix_vars1([:, 'decons-atom', [->, 'Expression', 'Expression']], _379454)
   Call: (273) [system] [:, 'decons-atom', [->, 'Expression', 'Expression']]==true
^  Redo: (272) [user] mfix_vars1([:, 'decons-atom', [->, 'Expression', 'Expression']], _379454)
^  Unify: (272) [user] mfix_vars1([:, 'decons-atom', [->, 'Expression', 'Expression']], _379454)
   Call: (273) [system] [:, 'decons-atom', [->, 'Expression', 'Expression']]==false
^  Redo: (272) [user] mfix_vars1([:, 'decons-atom', [->, 'Expression', 'Expression']], _379454)
^  Unify: (272) [user] mfix_vars1([:, 'decons-atom', [->, 'Expression', 'Expression']], _379454)
   Call: (273) [system] (:)=='['
^  Redo: (272) [user] mfix_vars1([:, 'decons-atom', [->, 'Expression', 'Expression']], _379454)
^  Unify: (272) [user] mfix_vars1([:, 'decons-atom', [->, 'Expression', 'Expression']], _379454)
   Call: (273) [system] (:)=='{'
^  Redo: (272) [user] mfix_vars1([:, 'decons-atom', [->, 'Expression', 'Expression']], _379454)
^  Unify: (272) [user] mfix_vars1([:, 'decons-atom', [->, 'Expression', 'Expression']], _379454)
   Call: (273) [system] is_list(['decons-atom', [->, 'Expression', 'Expression']])
   Exit: (273) [system] is_list(['decons-atom', [->, 'Expression', 'Expression']])
   Call: (273) [lists] lists:last(['decons-atom', [->, 'Expression', 'Expression']], _403608)
   Unify: (273) [lists] lists:last(['decons-atom', [->, 'Expression', 'Expression']], _403608)
   Call: (274) [lists] lists:last_([[->, 'Expression', 'Expression']], 'decons-atom', _403608)
   Unify: (274) [lists] lists:last_([[->, 'Expression', 'Expression']], 'decons-atom', _403608)
   Call: (275) [lists] lists:last_([], [->, 'Expression', 'Expression'], _403608)
   Unify: (275) [lists] lists:last_([], [->, 'Expression', 'Expression'], [->, 'Expression', 'Expression'])
   Exit: (275) [lists] lists:last_([], [->, 'Expression', 'Expression'], [->, 'Expression', 'Expression'])
   Exit: (274) [lists] lists:last_([[->, 'Expression', 'Expression']], 'decons-atom', [->, 'Expression', 'Expression'])
   Exit: (273) [lists] lists:last(['decons-atom', [->, 'Expression', 'Expression']], [->, 'Expression', 'Expression'])
   Call: (273) [system] [->, 'Expression', 'Expression']=='}'
^  Redo: (272) [user] mfix_vars1([:, 'decons-atom', [->, 'Expression', 'Expression']], _379454)
^  Unify: (272) [user] mfix_vars1([:, 'decons-atom', [->, 'Expression', 'Expression']], _379454)
   Call: (273) [system] [:, 'decons-atom', [->, 'Expression', 'Expression']]==[_414772, _414778]
^  Redo: (272) [user] mfix_vars1([:, 'decons-atom', [->, 'Expression', 'Expression']], _379454)
^  Unify: (272) [user] mfix_vars1([:, 'decons-atom', [->, 'Expression', 'Expression']], _379454)
   Call: (273) [system] fail
^  Redo: (272) [user] mfix_vars1([:, 'decons-atom', [->, 'Expression', 'Expression']], _379454)
^  Unify: (272) [user] mfix_vars1([:, 'decons-atom', [->, 'Expression', 'Expression']], _379454)
   Call: (273) [system] is_list([:, 'decons-atom', [->, 'Expression', 'Expression']])
   Exit: (273) [system] is_list([:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Call: (273) [user] apply:maplist(mfix_vars1, [:, 'decons-atom', [->, 'Expression', 'Expression']], _379454)
^  Unify: (273) [apply] apply:maplist(user:mfix_vars1, [:, 'decons-atom', [->, 'Expression', 'Expression']], _379454)
   Call: (274) [apply] apply:maplist_([:, 'decons-atom', [->, 'Expression', 'Expression']], _379454, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([:, 'decons-atom', [->, 'Expression', 'Expression']], [_425002|_425004], user:mfix_vars1)
^  Call: (275) [user] mfix_vars1(:, _425002)
^  Unify: (275) [user] mfix_vars1(:, _425002)
   Call: (276) [system] var(:)
^  Redo: (275) [user] mfix_vars1(:, _425002)
^  Unify: (275) [user] mfix_vars1(:, '$VAR'(_429648))
   Call: (276) [system] atom(:)
   Exit: (276) [system] atom(:)
^  Call: (276) [user] symbol_concat($, _432426, :)
^  Unify: (276) [user] symbol_concat($, _432426, :)
   Call: (277) [system] atom_concat($, _432426, :)
   Fail: (277) [system] atom_concat($, _432426, :)
^  Fail: (276) [user] symbol_concat($, _432426, :)
^  Redo: (275) [user] mfix_vars1(:, _425002)
^  Unify: (275) [user] mfix_vars1(:, _425002)
   Call: (276) [system] (:)==true
^  Redo: (275) [user] mfix_vars1(:, _425002)
^  Unify: (275) [user] mfix_vars1(:, _425002)
   Call: (276) [system] (:)==false
^  Redo: (275) [user] mfix_vars1(:, _425002)
^  Unify: (275) [user] mfix_vars1(:, _425002)
   Call: (276) [system] (:)==[_444514, _444520]
^  Redo: (275) [user] mfix_vars1(:, _425002)
^  Unify: (275) [user] mfix_vars1(:, _425002)
   Call: (276) [system] is_list(:)
^  Redo: (275) [user] mfix_vars1(:, _425002)
^  Unify: (275) [user] mfix_vars1(:, _425002)
   Call: (276) [system] string(:)
^  Redo: (275) [user] mfix_vars1(:, _425002)
^  Unify: (275) [user] mfix_vars1(:, _425002)
   Call: (276) [system] compound(:)
^  Redo: (275) [user] mfix_vars1(:, _425002)
^  Unify: (275) [user] mfix_vars1(:, _425002)
^  Call: (276) [user] symbol(:)
^  Unify: (276) [user] symbol(:)
   Call: (277) [system] atom(:)
   Exit: (277) [system] atom(:)
^  Exit: (276) [user] symbol(:)
^  Unify: (275) [user] mfix_vars1(:, :)
^  Exit: (275) [user] mfix_vars1(:, :)
   Call: (275) [apply] apply:maplist_(['decons-atom', [->, 'Expression', 'Expression']], _425004, user:mfix_vars1)
   Unify: (275) [apply] apply:maplist_(['decons-atom', [->, 'Expression', 'Expression']], [_463058|_463060], user:mfix_vars1)
^  Call: (276) [user] mfix_vars1('decons-atom', _463058)
^  Unify: (276) [user] mfix_vars1('decons-atom', _463058)
   Call: (277) [system] var('decons-atom')
^  Redo: (276) [user] mfix_vars1('decons-atom', _463058)
^  Unify: (276) [user] mfix_vars1('decons-atom', '$VAR'(_467704))
   Call: (277) [system] atom('decons-atom')
   Exit: (277) [system] atom('decons-atom')
^  Call: (277) [user] symbol_concat($, _470482, 'decons-atom')
^  Unify: (277) [user] symbol_concat($, _470482, 'decons-atom')
   Call: (278) [system] atom_concat($, _470482, 'decons-atom')
   Fail: (278) [system] atom_concat($, _470482, 'decons-atom')
^  Fail: (277) [user] symbol_concat($, _470482, 'decons-atom')
^  Redo: (276) [user] mfix_vars1('decons-atom', _463058)
^  Unify: (276) [user] mfix_vars1('decons-atom', _463058)
   Call: (277) [system] 'decons-atom'==true
^  Redo: (276) [user] mfix_vars1('decons-atom', _463058)
^  Unify: (276) [user] mfix_vars1('decons-atom', _463058)
   Call: (277) [system] 'decons-atom'==false
^  Redo: (276) [user] mfix_vars1('decons-atom', _463058)
^  Unify: (276) [user] mfix_vars1('decons-atom', _463058)
   Call: (277) [system] 'decons-atom'==[_482570, _482576]
^  Redo: (276) [user] mfix_vars1('decons-atom', _463058)
^  Unify: (276) [user] mfix_vars1('decons-atom', _463058)
   Call: (277) [system] is_list('decons-atom')
^  Redo: (276) [user] mfix_vars1('decons-atom', _463058)
^  Unify: (276) [user] mfix_vars1('decons-atom', _463058)
   Call: (277) [system] string('decons-atom')
^  Redo: (276) [user] mfix_vars1('decons-atom', _463058)
^  Unify: (276) [user] mfix_vars1('decons-atom', _463058)
   Call: (277) [system] compound('decons-atom')
^  Redo: (276) [user] mfix_vars1('decons-atom', _463058)
^  Unify: (276) [user] mfix_vars1('decons-atom', _463058)
^  Call: (277) [user] symbol('decons-atom')
^  Unify: (277) [user] symbol('decons-atom')
   Call: (278) [system] atom('decons-atom')
   Exit: (278) [system] atom('decons-atom')
^  Exit: (277) [user] symbol('decons-atom')
^  Unify: (276) [user] mfix_vars1('decons-atom', 'decons-atom')
^  Exit: (276) [user] mfix_vars1('decons-atom', 'decons-atom')
   Call: (276) [apply] apply:maplist_([[->, 'Expression', 'Expression']], _463060, user:mfix_vars1)
   Unify: (276) [apply] apply:maplist_([[->, 'Expression', 'Expression']], [_501114|_501116], user:mfix_vars1)
^  Call: (277) [user] mfix_vars1([->, 'Expression', 'Expression'], _501114)
^  Unify: (277) [user] mfix_vars1([->, 'Expression', 'Expression'], _501114)
   Call: (278) [system] var([->, 'Expression', 'Expression'])
^  Redo: (277) [user] mfix_vars1([->, 'Expression', 'Expression'], _501114)
^  Unify: (277) [user] mfix_vars1([->, 'Expression', 'Expression'], '$VAR'(_505760))
   Call: (278) [system] atom([->, 'Expression', 'Expression'])
^  Redo: (277) [user] mfix_vars1([->, 'Expression', 'Expression'], _501114)
^  Unify: (277) [user] mfix_vars1([->, 'Expression', 'Expression'], _501114)
   Call: (278) [system] [->, 'Expression', 'Expression']==true
^  Redo: (277) [user] mfix_vars1([->, 'Expression', 'Expression'], _501114)
^  Unify: (277) [user] mfix_vars1([->, 'Expression', 'Expression'], _501114)
   Call: (278) [system] [->, 'Expression', 'Expression']==false
^  Redo: (277) [user] mfix_vars1([->, 'Expression', 'Expression'], _501114)
^  Unify: (277) [user] mfix_vars1([->, 'Expression', 'Expression'], _501114)
   Call: (278) [system] (->)=='['
^  Redo: (277) [user] mfix_vars1([->, 'Expression', 'Expression'], _501114)
^  Unify: (277) [user] mfix_vars1([->, 'Expression', 'Expression'], _501114)
   Call: (278) [system] (->)=='{'
^  Redo: (277) [user] mfix_vars1([->, 'Expression', 'Expression'], _501114)
^  Unify: (277) [user] mfix_vars1([->, 'Expression', 'Expression'], _501114)
   Call: (278) [system] is_list(['Expression', 'Expression'])
   Exit: (278) [system] is_list(['Expression', 'Expression'])
   Call: (278) [lists] lists:last(['Expression', 'Expression'], _522454)
   Unify: (278) [lists] lists:last(['Expression', 'Expression'], _6028)
   Call: (279) [lists] lists:last_(['Expression'], 'Expression', _6028)
   Unify: (279) [lists] lists:last_(['Expression'], 'Expression', _6028)
   Call: (280) [lists] lists:last_([], 'Expression', _6028)
   Unify: (280) [lists] lists:last_([], 'Expression', 'Expression')
   Exit: (280) [lists] lists:last_([], 'Expression', 'Expression')
   Exit: (279) [lists] lists:last_(['Expression'], 'Expression', 'Expression')
   Exit: (278) [lists] lists:last(['Expression', 'Expression'], 'Expression')
   Call: (278) [system] 'Expression'=='}'
^  Redo: (277) [user] mfix_vars1([->, 'Expression', 'Expression'], _6024)
^  Unify: (277) [user] mfix_vars1([->, 'Expression', 'Expression'], _6024)
   Call: (278) [system] [->, 'Expression', 'Expression']==[_15732, _15738]
^  Redo: (277) [user] mfix_vars1([->, 'Expression', 'Expression'], _6024)
^  Unify: (277) [user] mfix_vars1([->, 'Expression', 'Expression'], _6024)
   Call: (278) [system] fail
^  Redo: (277) [user] mfix_vars1([->, 'Expression', 'Expression'], _6024)
^  Unify: (277) [user] mfix_vars1([->, 'Expression', 'Expression'], _6024)
   Call: (278) [system] is_list([->, 'Expression', 'Expression'])
   Exit: (278) [system] is_list([->, 'Expression', 'Expression'])
^  Call: (278) [user] apply:maplist(mfix_vars1, [->, 'Expression', 'Expression'], _6024)
^  Unify: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Expression', 'Expression'], _6024)
   Call: (279) [apply] apply:maplist_([->, 'Expression', 'Expression'], _6024, user:mfix_vars1)
   Unify: (279) [apply] apply:maplist_([->, 'Expression', 'Expression'], [_25962|_25964], user:mfix_vars1)
^  Call: (280) [user] mfix_vars1(->, _25962)
^  Unify: (280) [user] mfix_vars1(->, _25962)
   Call: (281) [system] var(->)
^  Redo: (280) [user] mfix_vars1(->, _25962)
^  Unify: (280) [user] mfix_vars1(->, '$VAR'(_30608))
   Call: (281) [system] atom(->)
   Exit: (281) [system] atom(->)
^  Call: (281) [user] symbol_concat($, _33386, ->)
^  Unify: (281) [user] symbol_concat($, _33386, ->)
   Call: (282) [system] atom_concat($, _33386, ->)
   Fail: (282) [system] atom_concat($, _33386, ->)
^  Fail: (281) [user] symbol_concat($, _33386, ->)
^  Redo: (280) [user] mfix_vars1(->, _25962)
^  Unify: (280) [user] mfix_vars1(->, _25962)
   Call: (281) [system] (->)==true
^  Redo: (280) [user] mfix_vars1(->, _25962)
^  Unify: (280) [user] mfix_vars1(->, _25962)
   Call: (281) [system] (->)==false
^  Redo: (280) [user] mfix_vars1(->, _25962)
^  Unify: (280) [user] mfix_vars1(->, _25962)
   Call: (281) [system] (->)==[_45474, _45480]
^  Redo: (280) [user] mfix_vars1(->, _25962)
^  Unify: (280) [user] mfix_vars1(->, _25962)
   Call: (281) [system] is_list(->)
^  Redo: (280) [user] mfix_vars1(->, _25962)
^  Unify: (280) [user] mfix_vars1(->, _25962)
   Call: (281) [system] string(->)
^  Redo: (280) [user] mfix_vars1(->, _25962)
^  Unify: (280) [user] mfix_vars1(->, _25962)
   Call: (281) [system] compound(->)
^  Redo: (280) [user] mfix_vars1(->, _25962)
^  Unify: (280) [user] mfix_vars1(->, _25962)
^  Call: (281) [user] symbol(->)
^  Unify: (281) [user] symbol(->)
   Call: (282) [system] atom(->)
   Exit: (282) [system] atom(->)
^  Exit: (281) [user] symbol(->)
^  Unify: (280) [user] mfix_vars1(->, ->)
^  Exit: (280) [user] mfix_vars1(->, ->)
   Call: (280) [apply] apply:maplist_(['Expression', 'Expression'], _25964, user:mfix_vars1)
   Unify: (280) [apply] apply:maplist_(['Expression', 'Expression'], [_64018|_64020], user:mfix_vars1)
^  Call: (281) [user] mfix_vars1('Expression', _64018)
^  Unify: (281) [user] mfix_vars1('Expression', _64018)
   Call: (282) [system] var('Expression')
^  Redo: (281) [user] mfix_vars1('Expression', _64018)
^  Unify: (281) [user] mfix_vars1('Expression', '$VAR'(_68664))
   Call: (282) [system] atom('Expression')
   Exit: (282) [system] atom('Expression')
^  Call: (282) [user] symbol_concat($, _71442, 'Expression')
^  Unify: (282) [user] symbol_concat($, _71442, 'Expression')
   Call: (283) [system] atom_concat($, _71442, 'Expression')
   Fail: (283) [system] atom_concat($, _71442, 'Expression')
^  Fail: (282) [user] symbol_concat($, _71442, 'Expression')
^  Redo: (281) [user] mfix_vars1('Expression', _64018)
^  Unify: (281) [user] mfix_vars1('Expression', _64018)
   Call: (282) [system] 'Expression'==true
^  Redo: (281) [user] mfix_vars1('Expression', _64018)
^  Unify: (281) [user] mfix_vars1('Expression', _64018)
   Call: (282) [system] 'Expression'==false
^  Redo: (281) [user] mfix_vars1('Expression', _64018)
^  Unify: (281) [user] mfix_vars1('Expression', _64018)
   Call: (282) [system] 'Expression'==[_83530, _83536]
^  Redo: (281) [user] mfix_vars1('Expression', _64018)
^  Unify: (281) [user] mfix_vars1('Expression', _64018)
   Call: (282) [system] is_list('Expression')
^  Redo: (281) [user] mfix_vars1('Expression', _64018)
^  Unify: (281) [user] mfix_vars1('Expression', _64018)
   Call: (282) [system] string('Expression')
^  Redo: (281) [user] mfix_vars1('Expression', _64018)
^  Unify: (281) [user] mfix_vars1('Expression', _64018)
   Call: (282) [system] compound('Expression')
^  Redo: (281) [user] mfix_vars1('Expression', _64018)
^  Unify: (281) [user] mfix_vars1('Expression', _64018)
^  Call: (282) [user] symbol('Expression')
^  Unify: (282) [user] symbol('Expression')
   Call: (283) [system] atom('Expression')
   Exit: (283) [system] atom('Expression')
^  Exit: (282) [user] symbol('Expression')
^  Unify: (281) [user] mfix_vars1('Expression', 'Expression')
^  Exit: (281) [user] mfix_vars1('Expression', 'Expression')
   Call: (281) [apply] apply:maplist_(['Expression'], _64020, user:mfix_vars1)
   Unify: (281) [apply] apply:maplist_(['Expression'], [_102074|_102076], user:mfix_vars1)
^  Call: (282) [user] mfix_vars1('Expression', _102074)
^  Unify: (282) [user] mfix_vars1('Expression', _102074)
   Call: (283) [system] var('Expression')
^  Redo: (282) [user] mfix_vars1('Expression', _102074)
^  Unify: (282) [user] mfix_vars1('Expression', '$VAR'(_106720))
   Call: (283) [system] atom('Expression')
   Exit: (283) [system] atom('Expression')
^  Call: (283) [user] symbol_concat($, _109498, 'Expression')
^  Unify: (283) [user] symbol_concat($, _109498, 'Expression')
   Call: (284) [system] atom_concat($, _109498, 'Expression')
   Fail: (284) [system] atom_concat($, _109498, 'Expression')
^  Fail: (283) [user] symbol_concat($, _109498, 'Expression')
^  Redo: (282) [user] mfix_vars1('Expression', _102074)
^  Unify: (282) [user] mfix_vars1('Expression', _102074)
   Call: (283) [system] 'Expression'==true
^  Redo: (282) [user] mfix_vars1('Expression', _102074)
^  Unify: (282) [user] mfix_vars1('Expression', _102074)
   Call: (283) [system] 'Expression'==false
^  Redo: (282) [user] mfix_vars1('Expression', _102074)
^  Unify: (282) [user] mfix_vars1('Expression', _102074)
   Call: (283) [system] 'Expression'==[_121586, _121592]
^  Redo: (282) [user] mfix_vars1('Expression', _102074)
^  Unify: (282) [user] mfix_vars1('Expression', _102074)
   Call: (283) [system] is_list('Expression')
^  Redo: (282) [user] mfix_vars1('Expression', _102074)
^  Unify: (282) [user] mfix_vars1('Expression', _102074)
   Call: (283) [system] string('Expression')
^  Redo: (282) [user] mfix_vars1('Expression', _102074)
^  Unify: (282) [user] mfix_vars1('Expression', _102074)
   Call: (283) [system] compound('Expression')
^  Redo: (282) [user] mfix_vars1('Expression', _102074)
^  Unify: (282) [user] mfix_vars1('Expression', _102074)
^  Call: (283) [user] symbol('Expression')
^  Unify: (283) [user] symbol('Expression')
   Call: (284) [system] atom('Expression')
   Exit: (284) [system] atom('Expression')
^  Exit: (283) [user] symbol('Expression')
^  Unify: (282) [user] mfix_vars1('Expression', 'Expression')
^  Exit: (282) [user] mfix_vars1('Expression', 'Expression')
   Call: (282) [apply] apply:maplist_([], _102076, user:mfix_vars1)
   Unify: (282) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (282) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (281) [apply] apply:maplist_(['Expression'], ['Expression'], user:mfix_vars1)
   Exit: (280) [apply] apply:maplist_(['Expression', 'Expression'], ['Expression', 'Expression'], user:mfix_vars1)
   Exit: (279) [apply] apply:maplist_([->, 'Expression', 'Expression'], [->, 'Expression', 'Expression'], user:mfix_vars1)
^  Exit: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Expression', 'Expression'], [->, 'Expression', 'Expression'])
^  Exit: (277) [user] mfix_vars1([->, 'Expression', 'Expression'], [->, 'Expression', 'Expression'])
   Call: (277) [apply] apply:maplist_([], _6026, user:mfix_vars1)
   Unify: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (276) [apply] apply:maplist_([[->, 'Expression', 'Expression']], [[->, 'Expression', 'Expression']], user:mfix_vars1)
   Exit: (275) [apply] apply:maplist_(['decons-atom', [->, 'Expression', 'Expression']], ['decons-atom', [->, 'Expression', 'Expression']], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']], user:mfix_vars1)
^  Exit: (273) [apply] apply:maplist(user:mfix_vars1, [:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Exit: (272) [user] mfix_vars1([:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Exit: (271) [system] call(user:mfix_vars1, [:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Exit: (270) [system] once(user:call(mfix_vars1, [:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']]))
   Call: (270) [system] [:, 'decons-atom', [->, 'Expression', 'Expression']]\=@=[:, 'decons-atom', [->, 'Expression', 'Expression']]
^  Redo: (269) [user] trly(mfix_vars1, [:, 'decons-atom', [->, 'Expression', 'Expression']], _5976)
^  Unify: (269) [user] trly(mfix_vars1, [:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Exit: (269) [user] trly(mfix_vars1, [:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Exit: (268) [system] once(user:trly(mfix_vars1, [:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']]))
^  Exit: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_c, [:, 'decons-atom', [->, 'Expression', 'Expression']], _161564))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_c, [:, 'decons-atom', [->, 'Expression', 'Expression']], _161564))
^  Call: (268) [user] once(user:trly(cons_to_c, [:, 'decons-atom', [->, 'Expression', 'Expression']], _161564))
^  Unify: (268) [system] once(user:trly(cons_to_c, [:, 'decons-atom', [->, 'Expression', 'Expression']], _161564))
^  Call: (269) [user] trly(cons_to_c, [:, 'decons-atom', [->, 'Expression', 'Expression']], _161564)
^  Unify: (269) [user] trly(cons_to_c, [:, 'decons-atom', [->, 'Expression', 'Expression']], _161564)
^  Call: (270) [user] once(call(cons_to_c, [:, 'decons-atom', [->, 'Expression', 'Expression']], _167150))
^  Unify: (270) [system] once(user:call(cons_to_c, [:, 'decons-atom', [->, 'Expression', 'Expression']], _167150))
^  Call: (271) [user] call(cons_to_c, [:, 'decons-atom', [->, 'Expression', 'Expression']], _167150)
^  Unify: (271) [system] call(user:cons_to_c, [:, 'decons-atom', [->, 'Expression', 'Expression']], _167150)
^  Call: (272) [user] cons_to_c([:, 'decons-atom', [->, 'Expression', 'Expression']], _167150)
^  Unify: (272) [user] cons_to_c([:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_c([:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Exit: (271) [system] call(user:cons_to_c, [:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Exit: (270) [system] once(user:call(cons_to_c, [:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']]))
   Call: (270) [system] [:, 'decons-atom', [->, 'Expression', 'Expression']]\=@=[:, 'decons-atom', [->, 'Expression', 'Expression']]
^  Redo: (269) [user] trly(cons_to_c, [:, 'decons-atom', [->, 'Expression', 'Expression']], _161564)
^  Unify: (269) [user] trly(cons_to_c, [:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Exit: (269) [user] trly(cons_to_c, [:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Exit: (268) [system] once(user:trly(cons_to_c, [:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_c, [:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_l, [:, 'decons-atom', [->, 'Expression', 'Expression']], _5956))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_l, [:, 'decons-atom', [->, 'Expression', 'Expression']], _5956))
^  Call: (268) [user] once(user:trly(cons_to_l, [:, 'decons-atom', [->, 'Expression', 'Expression']], _5956))
^  Unify: (268) [system] once(user:trly(cons_to_l, [:, 'decons-atom', [->, 'Expression', 'Expression']], _5956))
^  Call: (269) [user] trly(cons_to_l, [:, 'decons-atom', [->, 'Expression', 'Expression']], _5956)
^  Unify: (269) [user] trly(cons_to_l, [:, 'decons-atom', [->, 'Expression', 'Expression']], _5956)
^  Call: (270) [user] once(call(cons_to_l, [:, 'decons-atom', [->, 'Expression', 'Expression']], _189470))
^  Unify: (270) [system] once(user:call(cons_to_l, [:, 'decons-atom', [->, 'Expression', 'Expression']], _189470))
^  Call: (271) [user] call(cons_to_l, [:, 'decons-atom', [->, 'Expression', 'Expression']], _189470)
^  Unify: (271) [system] call(user:cons_to_l, [:, 'decons-atom', [->, 'Expression', 'Expression']], _189470)
^  Call: (272) [user] cons_to_l([:, 'decons-atom', [->, 'Expression', 'Expression']], _189470)
^  Unify: (272) [user] cons_to_l([:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_l([:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Exit: (271) [system] call(user:cons_to_l, [:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Exit: (270) [system] once(user:call(cons_to_l, [:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']]))
   Call: (270) [system] [:, 'decons-atom', [->, 'Expression', 'Expression']]\=@=[:, 'decons-atom', [->, 'Expression', 'Expression']]
^  Redo: (269) [user] trly(cons_to_l, [:, 'decons-atom', [->, 'Expression', 'Expression']], _5956)
^  Unify: (269) [user] trly(cons_to_l, [:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Exit: (269) [user] trly(cons_to_l, [:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Exit: (268) [system] once(user:trly(cons_to_l, [:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_l, [:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']]))
^  Exit: (266) [user] untyped_to_metta([:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Exit: (265) [system] call(user:untyped_to_metta, [:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Exit: (264) [system] once(user:call(untyped_to_metta, [:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']]))
   Call: (264) [system] [:, 'decons-atom', [->, 'Expression', 'Expression']]\=@=[:, 'decons-atom', [->, 'Expression', 'Expression']]
^  Redo: (263) [user] trly(untyped_to_metta, [:, 'decons-atom', [->, 'Expression', 'Expression']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Exit: (263) [user] trly(untyped_to_metta, [:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Exit: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'decons-atom', [->, 'Expression', 'Expression']])
   Call: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'decons-atom', [->, 'Expression', 'Expression']])))
   Unify: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'decons-atom', [->, 'Expression', 'Expression']])))
   Exit: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'decons-atom', [->, 'Expression', 'Expression']])))
^  Exit: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Exit: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'decons-atom', [->, 'Expression', 'Expression']])
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'decons-atom', [->, 'Expression', 'Expression']])))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'decons-atom', [->, 'Expression', 'Expression']])))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'decons-atom', [->, 'Expression', 'Expression']])))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), [:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Call: (257) [user] subst_vars([:, 'decons-atom', [->, 'Expression', 'Expression']], _223778, [], _223780)
^  Unify: (257) [user] subst_vars([:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']], [], [])
   Call: (258) [system] var([:, 'decons-atom', [->, 'Expression', 'Expression']])
^  Redo: (257) [user] subst_vars([:, 'decons-atom', [->, 'Expression', 'Expression']], _223778, [], _223780)
^  Unify: (257) [user] subst_vars([:, 'decons-atom', [->, 'Expression', 'Expression']], [_227516|_227518], [], _223780)
^  Call: (258) [user] subst_vars(:, _227516, [], _228456)
^  Unify: (258) [user] subst_vars(:, :, [], [])
   Call: (259) [system] var(:)
^  Redo: (258) [user] subst_vars(:, _227516, [], _228456)
^  Unify: (258) [user] subst_vars(:, _227516, [], _228456)
   Call: (259) [system] atom(:)
   Exit: (259) [system] atom(:)
^  Call: (259) [user] symbol_concat($, _234974, :)
^  Unify: (259) [user] symbol_concat($, _234974, :)
   Call: (260) [system] atom_concat($, _234974, :)
   Fail: (260) [system] atom_concat($, _234974, :)
^  Fail: (259) [user] symbol_concat($, _234974, :)
^  Redo: (258) [user] subst_vars(:, _227516, [], _228456)
^  Unify: (258) [user] subst_vars(:, _227516, [], _228456)
   Call: (259) [system] compound(:)
^  Redo: (258) [user] subst_vars(:, _227516, [], _228456)
^  Unify: (258) [user] subst_vars(:, :, [], [])
^  Exit: (258) [user] subst_vars(:, :, [], [])
^  Call: (258) [user] subst_vars(['decons-atom', [->, 'Expression', 'Expression']], _227518, [], _223780)
^  Unify: (258) [user] subst_vars(['decons-atom', [->, 'Expression', 'Expression']], ['decons-atom', [->, 'Expression', 'Expression']], [], [])
   Call: (259) [system] var(['decons-atom', [->, 'Expression', 'Expression']])
^  Redo: (258) [user] subst_vars(['decons-atom', [->, 'Expression', 'Expression']], _227518, [], _223780)
^  Unify: (258) [user] subst_vars(['decons-atom', [->, 'Expression', 'Expression']], [_248974|_248976], [], _223780)
^  Call: (259) [user] subst_vars('decons-atom', _248974, [], _249914)
^  Unify: (259) [user] subst_vars('decons-atom', 'decons-atom', [], [])
   Call: (260) [system] var('decons-atom')
^  Redo: (259) [user] subst_vars('decons-atom', _248974, [], _249914)
^  Unify: (259) [user] subst_vars('decons-atom', _248974, [], _249914)
   Call: (260) [system] atom('decons-atom')
   Exit: (260) [system] atom('decons-atom')
^  Call: (260) [user] symbol_concat($, _256432, 'decons-atom')
^  Unify: (260) [user] symbol_concat($, _256432, 'decons-atom')
   Call: (261) [system] atom_concat($, _256432, 'decons-atom')
   Fail: (261) [system] atom_concat($, _256432, 'decons-atom')
^  Fail: (260) [user] symbol_concat($, _256432, 'decons-atom')
^  Redo: (259) [user] subst_vars('decons-atom', _248974, [], _249914)
^  Unify: (259) [user] subst_vars('decons-atom', _248974, [], _249914)
   Call: (260) [system] compound('decons-atom')
^  Redo: (259) [user] subst_vars('decons-atom', _248974, [], _249914)
^  Unify: (259) [user] subst_vars('decons-atom', 'decons-atom', [], [])
^  Exit: (259) [user] subst_vars('decons-atom', 'decons-atom', [], [])
^  Call: (259) [user] subst_vars([[->, 'Expression', 'Expression']], _248976, [], _223780)
^  Unify: (259) [user] subst_vars([[->, 'Expression', 'Expression']], [[->, 'Expression', 'Expression']], [], [])
   Call: (260) [system] var([[->, 'Expression', 'Expression']])
^  Redo: (259) [user] subst_vars([[->, 'Expression', 'Expression']], _248976, [], _223780)
^  Unify: (259) [user] subst_vars([[->, 'Expression', 'Expression']], [_270432|_270434], [], _223780)
^  Call: (260) [user] subst_vars([->, 'Expression', 'Expression'], _270432, [], _271372)
^  Unify: (260) [user] subst_vars([->, 'Expression', 'Expression'], [->, 'Expression', 'Expression'], [], [])
   Call: (261) [system] var([->, 'Expression', 'Expression'])
^  Redo: (260) [user] subst_vars([->, 'Expression', 'Expression'], _270432, [], _271372)
^  Unify: (260) [user] subst_vars([->, 'Expression', 'Expression'], [_275108|_275110], [], _271372)
^  Call: (261) [user] subst_vars(->, _275108, [], _276048)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
   Call: (262) [system] var(->)
^  Redo: (261) [user] subst_vars(->, _275108, [], _276048)
^  Unify: (261) [user] subst_vars(->, _275108, [], _276048)
   Call: (262) [system] atom(->)
   Exit: (262) [system] atom(->)
^  Call: (262) [user] symbol_concat($, _282566, ->)
^  Unify: (262) [user] symbol_concat($, _282566, ->)
   Call: (263) [system] atom_concat($, _282566, ->)
   Fail: (263) [system] atom_concat($, _282566, ->)
^  Fail: (262) [user] symbol_concat($, _282566, ->)
^  Redo: (261) [user] subst_vars(->, _275108, [], _276048)
^  Unify: (261) [user] subst_vars(->, _275108, [], _276048)
   Call: (262) [system] compound(->)
^  Redo: (261) [user] subst_vars(->, _275108, [], _276048)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
^  Exit: (261) [user] subst_vars(->, ->, [], [])
^  Call: (261) [user] subst_vars(['Expression', 'Expression'], _275110, [], _271372)
^  Unify: (261) [user] subst_vars(['Expression', 'Expression'], ['Expression', 'Expression'], [], [])
   Call: (262) [system] var(['Expression', 'Expression'])
^  Redo: (261) [user] subst_vars(['Expression', 'Expression'], _275110, [], _271372)
^  Unify: (261) [user] subst_vars(['Expression', 'Expression'], [_296566|_296568], [], _271372)
^  Call: (262) [user] subst_vars('Expression', _296566, [], _297506)
^  Unify: (262) [user] subst_vars('Expression', 'Expression', [], [])
   Call: (263) [system] var('Expression')
^  Redo: (262) [user] subst_vars('Expression', _296566, [], _297506)
^  Unify: (262) [user] subst_vars('Expression', _296566, [], _297506)
   Call: (263) [system] atom('Expression')
   Exit: (263) [system] atom('Expression')
^  Call: (263) [user] symbol_concat($, _304024, 'Expression')
^  Unify: (263) [user] symbol_concat($, _304024, 'Expression')
   Call: (264) [system] atom_concat($, _304024, 'Expression')
   Fail: (264) [system] atom_concat($, _304024, 'Expression')
^  Fail: (263) [user] symbol_concat($, _304024, 'Expression')
^  Redo: (262) [user] subst_vars('Expression', _296566, [], _297506)
^  Unify: (262) [user] subst_vars('Expression', _296566, [], _297506)
   Call: (263) [system] compound('Expression')
^  Redo: (262) [user] subst_vars('Expression', _296566, [], _297506)
^  Unify: (262) [user] subst_vars('Expression', 'Expression', [], [])
^  Exit: (262) [user] subst_vars('Expression', 'Expression', [], [])
^  Call: (262) [user] subst_vars(['Expression'], _296568, [], _271372)
^  Unify: (262) [user] subst_vars(['Expression'], ['Expression'], [], [])
   Call: (263) [system] var(['Expression'])
^  Redo: (262) [user] subst_vars(['Expression'], _296568, [], _271372)
^  Unify: (262) [user] subst_vars(['Expression'], [_318024|_318026], [], _271372)
^  Call: (263) [user] subst_vars('Expression', _318024, [], _318964)
^  Unify: (263) [user] subst_vars('Expression', 'Expression', [], [])
   Call: (264) [system] var('Expression')
^  Redo: (263) [user] subst_vars('Expression', _318024, [], _318964)
^  Unify: (263) [user] subst_vars('Expression', _318024, [], _318964)
   Call: (264) [system] atom('Expression')
   Exit: (264) [system] atom('Expression')
^  Call: (264) [user] symbol_concat($, _325482, 'Expression')
^  Unify: (264) [user] symbol_concat($, _325482, 'Expression')
   Call: (265) [system] atom_concat($, _325482, 'Expression')
   Fail: (265) [system] atom_concat($, _325482, 'Expression')
^  Fail: (264) [user] symbol_concat($, _325482, 'Expression')
^  Redo: (263) [user] subst_vars('Expression', _318024, [], _318964)
^  Unify: (263) [user] subst_vars('Expression', _318024, [], _318964)
   Call: (264) [system] compound('Expression')
^  Redo: (263) [user] subst_vars('Expression', _318024, [], _318964)
^  Unify: (263) [user] subst_vars('Expression', 'Expression', [], [])
^  Exit: (263) [user] subst_vars('Expression', 'Expression', [], [])
^  Call: (263) [user] subst_vars([], _318026, [], _271372)
^  Unify: (263) [user] subst_vars([], [], [], [])
   Call: (264) [system] var([])
^  Redo: (263) [user] subst_vars([], _318026, [], _271372)
^  Unify: (263) [user] subst_vars([], [], [], [])
^  Exit: (263) [user] subst_vars([], [], [], [])
^  Exit: (262) [user] subst_vars(['Expression'], ['Expression'], [], [])
^  Exit: (261) [user] subst_vars(['Expression', 'Expression'], ['Expression', 'Expression'], [], [])
^  Exit: (260) [user] subst_vars([->, 'Expression', 'Expression'], [->, 'Expression', 'Expression'], [], [])
^  Call: (260) [user] subst_vars([], _270434, [], _223780)
^  Unify: (260) [user] subst_vars([], [], [], [])
   Call: (261) [system] var([])
^  Redo: (260) [user] subst_vars([], _270434, [], _223780)
^  Unify: (260) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([], [], [], [])
^  Exit: (259) [user] subst_vars([[->, 'Expression', 'Expression']], [[->, 'Expression', 'Expression']], [], [])
^  Exit: (258) [user] subst_vars(['decons-atom', [->, 'Expression', 'Expression']], ['decons-atom', [->, 'Expression', 'Expression']], [], [])
^  Exit: (257) [user] subst_vars([:, 'decons-atom', [->, 'Expression', 'Expression']], [:, 'decons-atom', [->, 'Expression', 'Expression']], [], [])
   Call: (257) [system] _352572=metta_file_buffer(+, [:, 'decons-atom', [->, 'Expression', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(459, 15, 45, 459))
   Exit: (257) [system] metta_file_buffer(+, [:, 'decons-atom', [->, 'Expression', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(459, 15, 45, 459))=metta_file_buffer(+, [:, 'decons-atom', [->, 'Expression', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(459, 15, 45, 459))
^  Call: (257) [user] assertz(metta_file_buffer(+, [:, 'decons-atom', [->, 'Expression', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(459, 15, 45, 459)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, [:, 'decons-atom', [->, 'Expression', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(459, 15, 45, 459)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'decons-atom', [->, 'Expression', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(459, 15, 45, 459))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'decons-atom', [->, 'Expression', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(459, 15, 45, 459))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'decons-atom', [->, 'Expression', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(459, 15, 45, 459))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'decons-atom', [->, 'Expression', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(459, 15, 45, 459))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
   Redo: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _403366)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _404304))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _404304)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 502)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _403366)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _403366)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_403366))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_403366))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_403366))
   Exit: (259) [system] nonvar(position(_403366))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(502, 16, 42, 502)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(502, 16, 42, 502))
   Call: (257) [user] current_read_mode(file, _423784)
   Unify: (257) [user] current_read_mode(file, _423784)
   Call: (258) [system] nb_current(file_mode, _423784)
   Redo: (257) [user] current_read_mode(file, _423784)
   Call: (258) [system] _423784=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _430234)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _430234)
^  Call: (258) [user] clause(t_l:s_reader_info(_430234), _432180, _432102)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _430234)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _430234)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _430234)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _430234)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _430234)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _430234)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _430234)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _430234)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _446010)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (260) [system] char_type('\n', space)
   Exit: (260) [system] char_type('\n', space)
   Call: (260) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (260) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _430234)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _430234)
   Call: (261) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _430234)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _430234)
   Call: (261) [system] peek_char((0x55aefe44e2f0), _456216)
   Exit: (261) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (261) [system] char_type('(', space)
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _430234)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _430234)
^  Call: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (262) [system] string((0x55aefe44e2f0))
^  Redo: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _430234)
^  Unify: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _430234)
^  Call: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _430234)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _430234)
   Call: (263) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _430234)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _430234)
   Call: (263) [system] peek_char((0x55aefe44e2f0), _471970)
   Exit: (263) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (263) [system] char_type('(', space)
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _430234)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _430234)
   Call: (263) [system] _476612=(0x55aefe44e2f0)
   Exit: (263) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (263) [user] once((read_position((0x55aefe44e2f0), _478480, _478482, _478484, _478486), read_sexpr((0x55aefe44e2f0), _478498), assertz(metta_file_comment(_478480, _478482, _478484, _478498, _478486))))
^  Unify: (263) [system] once(user:(read_position((0x55aefe44e2f0), _478480, _478482, _478484, _478486), read_sexpr((0x55aefe44e2f0), _478498), assertz(metta_file_comment(_478480, _478482, _478484, _478498, _478486))))
^  Call: (265) [user] read_position((0x55aefe44e2f0), _478480, _478482, _478484, _478486)
^  Unify: (265) [user] read_position((0x55aefe44e2f0), _478480, _478482, _478484, _478486)
   Call: (266) [system] stream_property((0x55aefe44e2f0), position(_478486))
   Unify: (266) [system] stream_property((0x55aefe44e2f0), position(_478486))
   Call: (267) [system] nonvar((0x55aefe44e2f0))
   Exit: (267) [system] nonvar((0x55aefe44e2f0))
   Call: (267) [system] nonvar(position(_478486))
   Exit: (267) [system] nonvar(position(_478486))
   Exit: (266) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(503, 17, 0, 503)))
   Call: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(503, 17, 0, 503), _478480)
   Unify: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(503, 17, 0, 503), _478480)
   Call: (267) [system] nonvar(line_count)
   Exit: (267) [system] nonvar(line_count)
   Call: (267) [$syspreds] stream_position_field(line_count, _492468)
   Unify: (267) [$syspreds] stream_position_field(line_count, 2)
   Exit: (267) [$syspreds] stream_position_field(line_count, 2)
   Call: (267) [system] arg(2, '$stream_position'(503, 17, 0, 503), _478480)
   Exit: (267) [system] arg(2, '$stream_position'(503, 17, 0, 503), 17)
   Exit: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(503, 17, 0, 503), 17)
   Call: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(503, 17, 0, 503), _478482)
   Unify: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(503, 17, 0, 503), _478482)
   Call: (267) [system] nonvar(line_position)
   Exit: (267) [system] nonvar(line_position)
   Call: (267) [$syspreds] stream_position_field(line_position, _501762)
   Unify: (267) [$syspreds] stream_position_field(line_position, 3)
   Exit: (267) [$syspreds] stream_position_field(line_position, 3)
   Call: (267) [system] arg(3, '$stream_position'(503, 17, 0, 503), _478482)
   Exit: (267) [system] arg(3, '$stream_position'(503, 17, 0, 503), 0)
   Exit: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(503, 17, 0, 503), 0)
   Call: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(503, 17, 0, 503), _478484)
   Unify: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(503, 17, 0, 503), _478484)
   Call: (267) [system] nonvar(char_count)
   Exit: (267) [system] nonvar(char_count)
   Call: (267) [$syspreds] stream_position_field(char_count, _511056)
   Unify: (267) [$syspreds] stream_position_field(char_count, 1)
   Exit: (267) [$syspreds] stream_position_field(char_count, 1)
   Call: (267) [system] arg(1, '$stream_position'(503, 17, 0, 503), _478484)
   Exit: (267) [system] arg(1, '$stream_position'(503, 17, 0, 503), 503)
   Exit: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(503, 17, 0, 503), 503)
^  Exit: (265) [user] read_position((0x55aefe44e2f0), 17, 0, 503, '$stream_position'(503, 17, 0, 503))
^  Call: (265) [user] read_sexpr((0x55aefe44e2f0), _478498)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _478498)
   Call: (266) [system] string((0x55aefe44e2f0))
^  Redo: (265) [user] read_sexpr((0x55aefe44e2f0), _478498)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _478498)
^  Call: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _478498)
^  Unify: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _478498)
^  Call: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _7784)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (268) [system] '('=(;)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', 'white')
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', end_of_line)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', space)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', cntrl)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (267) [system] get_char((0x55aefe44e2f0), _24568)
   Exit: (267) [system] get_char((0x55aefe44e2f0), '(')
   Call: (267) [system] '('='('
   Exit: (267) [system] '('='('
^  Call: (267) [user] read_list(')', (0x55aefe44e2f0), _5942)
^  Unify: (267) [user] read_list(')', (0x55aefe44e2f0), _5942)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _31994)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, 'white')
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, end_of_line)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, space)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _48778)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), :)
   Call: (268) [system] (:)=')'
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _5942)
   Call: (268) [system] (:)=end_of_file
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _5942)
^  Call: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _54356)
^  Unify: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _54356)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _58070)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, 'white')
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, end_of_line)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, space)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, cntrl)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] get_char((0x55aefe44e2f0), _74854)
   Exit: (269) [system] get_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)='('
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _54356)
   Call: (269) [system] (:)='['
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _54356)
   Call: (269) [system] (:)='{'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _54356)
   Call: (269) [system] (:)='"'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _54356)
   Call: (269) [system] (:)=!
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _54356)
   Call: (269) [system] (:)='\''
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _54356)
   Call: (269) [system] (:)='`'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _54356)
   Call: (269) [system] (:)=end_of_file
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _54356)
^  Call: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _54356)
^  Unify: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _54356)
^  Call: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _93464)
^  Unify: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _93464)
   Call: (271) [system] peek_char((0x55aefe44e2f0), _95330)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] is_delimiter(' ')
^  Unify: (271) [user] is_delimiter(' ')
   Call: (272) [system] char_type(' ', space)
   Exit: (272) [system] char_type(' ', space)
^  Exit: (271) [user] is_delimiter(' ')
   Call: (271) [system] _93464=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (270) [user] classify_and_convert_charseq(:, [], _54356)
^  Unify: (270) [user] classify_and_convert_charseq(:, [], _54356)
^  Call: (272) [system] setup_call_cleanup('$notrace'(_106496, _106498), once(user:catch(read_from_chars([:], _54356), _106472, fail)), '$restore_trace'(_106496, _106498))
^  Unify: (272) [system] setup_call_cleanup(system:'$notrace'(_106496, _106498), system:once(user:catch(read_from_chars([:], _54356), _106472, fail)), system:'$restore_trace'(_106496, _106498))
^  Call: (273) [system] sig_atomic(system:'$notrace'(_106496, _106498))
^  Exit: (272) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([:], :), _106472, fail)), system:'$restore_trace'(3, -1))
   Call: (271) [system] atomic(:)
   Exit: (271) [system] atomic(:)
^  Exit: (270) [user] classify_and_convert_charseq(:, [], :)
^  Exit: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, :)
^  Exit: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), :)
^  Call: (268) [user] read_list(')', (0x55aefe44e2f0), _114934)
^  Unify: (268) [user] read_list(')', (0x55aefe44e2f0), _114934)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _118648)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (270) [system] ' '=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(' ')
^  Unify: (270) [user] is_like_space(' ')
   Call: (271) [system] char_type(' ', 'white')
   Exit: (271) [system] char_type(' ', 'white')
^  Exit: (270) [user] is_like_space(' ')
   Call: (270) [system] get_char((0x55aefe44e2f0), _127306)
   Exit: (270) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _130934)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), c)
   Call: (271) [system] c=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, 'white')
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, end_of_line)
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, space)
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _148642)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), c)
   Call: (269) [system] c=')'
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _114934)
   Call: (269) [system] c=end_of_file
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _114934)
^  Call: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _154220)
^  Unify: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _154220)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _157934)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), c)
   Call: (271) [system] c=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, 'white')
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, end_of_line)
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, space)
^  Redo: (271) [user] is_like_space(c)
^  Unify: (271) [user] is_like_space(c)
   Call: (272) [system] char_type(c, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] get_char((0x55aefe44e2f0), _174718)
   Exit: (270) [system] get_char((0x55aefe44e2f0), c)
   Call: (270) [system] c='('
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _154220)
   Call: (270) [system] c='['
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _154220)
   Call: (270) [system] c='{'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _154220)
   Call: (270) [system] c='"'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _154220)
   Call: (270) [system] c=!
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _154220)
   Call: (270) [system] c='\''
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _154220)
   Call: (270) [system] c='`'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _154220)
   Call: (270) [system] c=end_of_file
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _154220)
^  Call: (270) [user] read_symbolic(')', (0x55aefe44e2f0), c, _154220)
^  Unify: (270) [user] read_symbolic(')', (0x55aefe44e2f0), c, _154220)
^  Call: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _193328)
^  Unify: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _193328)
   Call: (272) [system] peek_char((0x55aefe44e2f0), _195194)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (272) [user] is_delimiter(o)
^  Unify: (272) [user] is_delimiter(o)
   Call: (273) [system] char_type(o, space)
^  Redo: (272) [user] is_delimiter(o)
   Call: (273) [system] arg(_200834, v('(', ')', end_of_file), o)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _193328)
   Call: (272) [system] ')'==o
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _193328)
   Call: (272) [system] get_char((0x55aefe44e2f0), o)
   Exit: (272) [system] get_char((0x55aefe44e2f0), o)
   Call: (272) [system] o=(\)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _193328)
^  Call: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _208200)
^  Unify: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _208200)
   Call: (273) [system] peek_char((0x55aefe44e2f0), _210066)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (273) [user] is_delimiter(l)
^  Unify: (273) [user] is_delimiter(l)
   Call: (274) [system] char_type(l, space)
^  Redo: (273) [user] is_delimiter(l)
   Call: (274) [system] arg(_215706, v('(', ')', end_of_file), l)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _208200)
   Call: (273) [system] ')'==l
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _208200)
   Call: (273) [system] get_char((0x55aefe44e2f0), l)
   Exit: (273) [system] get_char((0x55aefe44e2f0), l)
   Call: (273) [system] l=(\)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _208200)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _223072)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _223072)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _224938)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (274) [user] is_delimiter(l)
^  Unify: (274) [user] is_delimiter(l)
   Call: (275) [system] char_type(l, space)
^  Redo: (274) [user] is_delimiter(l)
   Call: (275) [system] arg(_230578, v('(', ')', end_of_file), l)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _223072)
   Call: (274) [system] ')'==l
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _223072)
   Call: (274) [system] get_char((0x55aefe44e2f0), l)
   Exit: (274) [system] get_char((0x55aefe44e2f0), l)
   Call: (274) [system] l=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _223072)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237944)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237944)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _239810)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (275) [user] is_delimiter(a)
^  Unify: (275) [user] is_delimiter(a)
   Call: (276) [system] char_type(a, space)
^  Redo: (275) [user] is_delimiter(a)
   Call: (276) [system] arg(_245450, v('(', ')', end_of_file), a)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237944)
   Call: (275) [system] ')'==a
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237944)
   Call: (275) [system] get_char((0x55aefe44e2f0), a)
   Exit: (275) [system] get_char((0x55aefe44e2f0), a)
   Call: (275) [system] a=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237944)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _252816)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _252816)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _254682)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (276) [user] is_delimiter(p)
^  Unify: (276) [user] is_delimiter(p)
   Call: (277) [system] char_type(p, space)
^  Redo: (276) [user] is_delimiter(p)
   Call: (277) [system] arg(_260322, v('(', ')', end_of_file), p)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _252816)
   Call: (276) [system] ')'==p
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _252816)
   Call: (276) [system] get_char((0x55aefe44e2f0), p)
   Exit: (276) [system] get_char((0x55aefe44e2f0), p)
   Call: (276) [system] p=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _252816)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _267688)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _267688)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _269554)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (277) [user] is_delimiter(s)
^  Unify: (277) [user] is_delimiter(s)
   Call: (278) [system] char_type(s, space)
^  Redo: (277) [user] is_delimiter(s)
   Call: (278) [system] arg(_275194, v('(', ')', end_of_file), s)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _267688)
   Call: (277) [system] ')'==s
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _267688)
   Call: (277) [system] get_char((0x55aefe44e2f0), s)
   Exit: (277) [system] get_char((0x55aefe44e2f0), s)
   Call: (277) [system] s=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _267688)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _282560)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _282560)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _284426)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (278) [user] is_delimiter(e)
^  Unify: (278) [user] is_delimiter(e)
   Call: (279) [system] char_type(e, space)
^  Redo: (278) [user] is_delimiter(e)
   Call: (279) [system] arg(_290066, v('(', ')', end_of_file), e)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _282560)
   Call: (278) [system] ')'==e
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _282560)
   Call: (278) [system] get_char((0x55aefe44e2f0), e)
   Exit: (278) [system] get_char((0x55aefe44e2f0), e)
   Call: (278) [system] e=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _282560)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _297432)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _297432)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _299298)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), -)
^  Call: (279) [user] is_delimiter(-)
^  Unify: (279) [user] is_delimiter(-)
   Call: (280) [system] char_type(-, space)
^  Redo: (279) [user] is_delimiter(-)
   Call: (280) [system] arg(_304938, v('(', ')', end_of_file), -)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _297432)
   Call: (279) [system] ')'==(-)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _297432)
   Call: (279) [system] get_char((0x55aefe44e2f0), -)
   Exit: (279) [system] get_char((0x55aefe44e2f0), -)
   Call: (279) [system] (-)=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _297432)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _312304)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _312304)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _314170)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), b)
^  Call: (280) [user] is_delimiter(b)
^  Unify: (280) [user] is_delimiter(b)
   Call: (281) [system] char_type(b, space)
^  Redo: (280) [user] is_delimiter(b)
   Call: (281) [system] arg(_319810, v('(', ')', end_of_file), b)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _312304)
   Call: (280) [system] ')'==b
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _312304)
   Call: (280) [system] get_char((0x55aefe44e2f0), b)
   Exit: (280) [system] get_char((0x55aefe44e2f0), b)
   Call: (280) [system] b=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _312304)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _327176)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _327176)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _329042)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (281) [user] is_delimiter(i)
^  Unify: (281) [user] is_delimiter(i)
   Call: (282) [system] char_type(i, space)
^  Redo: (281) [user] is_delimiter(i)
   Call: (282) [system] arg(_334682, v('(', ')', end_of_file), i)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _327176)
   Call: (281) [system] ')'==i
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _327176)
   Call: (281) [system] get_char((0x55aefe44e2f0), i)
   Exit: (281) [system] get_char((0x55aefe44e2f0), i)
   Call: (281) [system] i=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _327176)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _342048)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _342048)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _343914)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (282) [user] is_delimiter(n)
^  Unify: (282) [user] is_delimiter(n)
   Call: (283) [system] char_type(n, space)
^  Redo: (282) [user] is_delimiter(n)
   Call: (283) [system] arg(_349554, v('(', ')', end_of_file), n)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _342048)
   Call: (282) [system] ')'==n
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _342048)
   Call: (282) [system] get_char((0x55aefe44e2f0), n)
   Exit: (282) [system] get_char((0x55aefe44e2f0), n)
   Call: (282) [system] n=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _342048)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _356920)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _356920)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _358786)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), d)
^  Call: (283) [user] is_delimiter(d)
^  Unify: (283) [user] is_delimiter(d)
   Call: (284) [system] char_type(d, space)
^  Redo: (283) [user] is_delimiter(d)
   Call: (284) [system] arg(_364426, v('(', ')', end_of_file), d)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _356920)
   Call: (283) [system] ')'==d
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _356920)
   Call: (283) [system] get_char((0x55aefe44e2f0), d)
   Exit: (283) [system] get_char((0x55aefe44e2f0), d)
   Call: (283) [system] d=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _356920)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _371792)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _371792)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _373658)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (284) [user] is_delimiter(' ')
^  Unify: (284) [user] is_delimiter(' ')
   Call: (285) [system] char_type(' ', space)
   Exit: (285) [system] char_type(' ', space)
^  Exit: (284) [user] is_delimiter(' ')
   Call: (284) [system] _371792=[]
   Exit: (284) [system] []=[]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (283) [system] _356920=[d]
   Exit: (283) [system] [d]=[d]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [d])
   Call: (282) [system] _342048=[n, d]
   Exit: (282) [system] [n, d]=[n, d]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n, d])
   Call: (281) [system] _327176=[i, n, d]
   Exit: (281) [system] [i, n, d]=[i, n, d]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, n, d])
   Call: (280) [system] _312304=[b, i, n, d]
   Exit: (280) [system] [b, i, n, d]=[b, i, n, d]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [b, i, n, d])
   Call: (279) [system] _297432=[-, b, i, n, d]
   Exit: (279) [system] [-, b, i, n, d]=[-, b, i, n, d]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [-, b, i, n, d])
   Call: (278) [system] _282560=[e, -, b, i, n, d]
   Exit: (278) [system] [e, -, b, i, n, d]=[e, -, b, i, n, d]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, -, b, i, n, d])
   Call: (277) [system] _267688=[s, e, -, b, i, n, d]
   Exit: (277) [system] [s, e, -, b, i, n, d]=[s, e, -, b, i, n, d]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, e, -, b, i, n, d])
   Call: (276) [system] _252816=[p, s, e, -, b, i, n, d]
   Exit: (276) [system] [p, s, e, -, b, i, n, d]=[p, s, e, -, b, i, n, d]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, s, e, -, b, i, n, d])
   Call: (275) [system] _237944=[a, p, s, e, -, b, i, n, d]
   Exit: (275) [system] [a, p, s, e, -, b, i, n, d]=[a, p, s, e, -, b, i, n, d]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, p, s, e, -, b, i, n, d])
   Call: (274) [system] _223072=[l, a, p, s, e, -, b, i, n, d]
   Exit: (274) [system] [l, a, p, s, e, -, b, i, n, d]=[l, a, p, s, e, -, b, i, n, d]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l, a, p, s, e, -, b, i, n, d])
   Call: (273) [system] _208200=[l, l, a, p, s, e, -, b, i, n, d]
   Exit: (273) [system] [l, l, a, p, s, e, -, b, i, n, d]=[l, l, a, p, s, e, -, b, i, n, d]
^  Exit: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l, l, a, p, s, e, -, b, i, n, d])
   Call: (272) [system] _193328=[o, l, l, a, p, s, e, -, b, i, n, d]
   Exit: (272) [system] [o, l, l, a, p, s, e, -, b, i, n, d]=[o, l, l, a, p, s, e, -, b, i, n, d]
^  Exit: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, l, l, a, p, s, e, -, b, i, n, d])
^  Call: (271) [user] classify_and_convert_charseq(c, [o, l, l, a, p, s, e, -, b, i, n, d], _154220)
^  Unify: (271) [user] classify_and_convert_charseq(c, [o, l, l, a, p, s, e, -, b, i, n, d], _154220)
^  Call: (273) [system] setup_call_cleanup('$notrace'(_418352, _418354), once(user:catch(read_from_chars([c, o, l, l, a, p, s, e, -, b, i, n, d], _154220), _418328, fail)), '$restore_trace'(_418352, _418354))
^  Unify: (273) [system] setup_call_cleanup(system:'$notrace'(_418352, _418354), system:once(user:catch(read_from_chars([c, o, l, l, a, p, s, e, -, b, i, n, d], _154220), _418328, fail)), system:'$restore_trace'(_418352, _418354))
^  Call: (274) [system] sig_atomic(system:'$notrace'(_418352, _418354))
^  Exit: (273) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([c, o, l, l, a, p, s, e, -, b, i, n, d], collapse-bind), _418328, fail)), system:'$restore_trace'(3, -1))
   Call: (272) [system] atomic(collapse-bind)
^  Redo: (271) [user] classify_and_convert_charseq(c, [o, l, l, a, p, s, e, -, b, i, n, d], _154220)
^  Unify: (271) [user] classify_and_convert_charseq(c, [o, l, l, a, p, s, e, -, b, i, n, d], _154220)
   Call: (272) [system] atom_chars(_154220, [c, o, l, l, a, p, s, e, -, b, i, n, d])
   Exit: (272) [system] atom_chars('collapse-bind', [c, o, l, l, a, p, s, e, -, b, i, n, d])
^  Exit: (271) [user] classify_and_convert_charseq(c, [o, l, l, a, p, s, e, -, b, i, n, d], 'collapse-bind')
^  Exit: (270) [user] read_symbolic(')', (0x55aefe44e2f0), c, 'collapse-bind')
^  Exit: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), 'collapse-bind')
^  Call: (269) [user] read_list(')', (0x55aefe44e2f0), _429598)
^  Unify: (269) [user] read_list(')', (0x55aefe44e2f0), _429598)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _433312)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (271) [system] ' '=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(' ')
^  Unify: (271) [user] is_like_space(' ')
   Call: (272) [system] char_type(' ', 'white')
   Exit: (272) [system] char_type(' ', 'white')
^  Exit: (271) [user] is_like_space(' ')
   Call: (271) [system] get_char((0x55aefe44e2f0), _441970)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _445598)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _463306)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (270) [system] '('=')'
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _429598)
   Call: (270) [system] '('=end_of_file
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _429598)
^  Call: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _468884)
^  Unify: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _468884)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _472598)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] get_char((0x55aefe44e2f0), _489382)
   Exit: (271) [system] get_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('='('
   Exit: (271) [system] '('='('
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _468884)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _468884)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _496808)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, 'white')
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, end_of_line)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, space)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _513592)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), -)
   Call: (272) [system] (-)=')'
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _468884)
   Call: (272) [system] (-)=end_of_file
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _468884)
^  Call: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _519170)
^  Unify: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _519170)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _522884)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, 'white')
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, end_of_line)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, space)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] get_char((0x55aefe44e2f0), _21676)
   Exit: (273) [system] get_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)='('
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _5998)
   Call: (273) [system] (-)='['
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _5998)
   Call: (273) [system] (-)='{'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _5998)
   Call: (273) [system] (-)='"'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _5998)
   Call: (273) [system] (-)=!
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _5998)
   Call: (273) [system] (-)='\''
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _5998)
   Call: (273) [system] (-)='`'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _5998)
   Call: (273) [system] (-)=end_of_file
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _5998)
^  Call: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _5998)
^  Unify: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _5998)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _40286)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _40286)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _42152)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), >)
^  Call: (275) [user] is_delimiter(>)
^  Unify: (275) [user] is_delimiter(>)
   Call: (276) [system] char_type(>, space)
^  Redo: (275) [user] is_delimiter(>)
   Call: (276) [system] arg(_47792, v('(', ')', end_of_file), >)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _40286)
   Call: (275) [system] ')'==(>)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _40286)
   Call: (275) [system] get_char((0x55aefe44e2f0), >)
   Exit: (275) [system] get_char((0x55aefe44e2f0), >)
   Call: (275) [system] (>)=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _40286)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _55158)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _55158)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _57024)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] is_delimiter(' ')
^  Unify: (276) [user] is_delimiter(' ')
   Call: (277) [system] char_type(' ', space)
   Exit: (277) [system] char_type(' ', space)
^  Exit: (276) [user] is_delimiter(' ')
   Call: (276) [system] _55158=[]
   Exit: (276) [system] []=[]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (275) [system] _40286=[>]
   Exit: (275) [system] [>]=[>]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [>])
^  Call: (274) [user] classify_and_convert_charseq(-, [>], _5998)
^  Unify: (274) [user] classify_and_convert_charseq(-, [>], _5998)
^  Call: (276) [system] setup_call_cleanup('$notrace'(_70984, _70986), once(user:catch(read_from_chars([-, >], _5998), _70960, fail)), '$restore_trace'(_70984, _70986))
^  Unify: (276) [system] setup_call_cleanup(system:'$notrace'(_70984, _70986), system:once(user:catch(read_from_chars([-, >], _5998), _70960, fail)), system:'$restore_trace'(_70984, _70986))
^  Call: (277) [system] sig_atomic(system:'$notrace'(_70984, _70986))
^  Exit: (276) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([-, >], ->), _70960, fail)), system:'$restore_trace'(3, -1))
   Call: (275) [system] atomic(->)
   Exit: (275) [system] atomic(->)
^  Exit: (274) [user] classify_and_convert_charseq(-, [>], ->)
^  Exit: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, ->)
^  Exit: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), ->)
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _79422)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _79422)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _83136)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (274) [system] ' '=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(' ')
^  Unify: (274) [user] is_like_space(' ')
   Call: (275) [system] char_type(' ', 'white')
   Exit: (275) [system] char_type(' ', 'white')
^  Exit: (274) [user] is_like_space(' ')
   Call: (274) [system] get_char((0x55aefe44e2f0), _91794)
   Exit: (274) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _95422)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', 'white')
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', end_of_line)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', space)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _113130)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (273) [system] 'A'=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _79422)
   Call: (273) [system] 'A'=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _79422)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _118708)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _118708)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _122422)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', 'white')
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', end_of_line)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', space)
^  Redo: (275) [user] is_like_space('A')
^  Unify: (275) [user] is_like_space('A')
   Call: (276) [system] char_type('A', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _139206)
   Exit: (274) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (274) [system] 'A'='('
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _118708)
   Call: (274) [system] 'A'='['
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _118708)
   Call: (274) [system] 'A'='{'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _118708)
   Call: (274) [system] 'A'='"'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _118708)
   Call: (274) [system] 'A'=!
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _118708)
   Call: (274) [system] 'A'='\''
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _118708)
   Call: (274) [system] 'A'='`'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _118708)
   Call: (274) [system] 'A'=end_of_file
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _118708)
^  Call: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _118708)
^  Unify: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _118708)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _157816)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _157816)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _159682)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (276) [user] is_delimiter(t)
^  Unify: (276) [user] is_delimiter(t)
   Call: (277) [system] char_type(t, space)
^  Redo: (276) [user] is_delimiter(t)
   Call: (277) [system] arg(_165322, v('(', ')', end_of_file), t)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _157816)
   Call: (276) [system] ')'==t
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _157816)
   Call: (276) [system] get_char((0x55aefe44e2f0), t)
   Exit: (276) [system] get_char((0x55aefe44e2f0), t)
   Call: (276) [system] t=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _157816)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _172688)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _172688)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _174554)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (277) [user] is_delimiter(o)
^  Unify: (277) [user] is_delimiter(o)
   Call: (278) [system] char_type(o, space)
^  Redo: (277) [user] is_delimiter(o)
   Call: (278) [system] arg(_180194, v('(', ')', end_of_file), o)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _172688)
   Call: (277) [system] ')'==o
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _172688)
   Call: (277) [system] get_char((0x55aefe44e2f0), o)
   Exit: (277) [system] get_char((0x55aefe44e2f0), o)
   Call: (277) [system] o=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _172688)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _187560)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _187560)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _189426)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (278) [user] is_delimiter(m)
^  Unify: (278) [user] is_delimiter(m)
   Call: (279) [system] char_type(m, space)
^  Redo: (278) [user] is_delimiter(m)
   Call: (279) [system] arg(_195066, v('(', ')', end_of_file), m)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _187560)
   Call: (278) [system] ')'==m
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _187560)
   Call: (278) [system] get_char((0x55aefe44e2f0), m)
   Exit: (278) [system] get_char((0x55aefe44e2f0), m)
   Call: (278) [system] m=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _187560)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _202432)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _202432)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _204298)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (279) [user] is_delimiter(' ')
^  Unify: (279) [user] is_delimiter(' ')
   Call: (280) [system] char_type(' ', space)
   Exit: (280) [system] char_type(' ', space)
^  Exit: (279) [user] is_delimiter(' ')
   Call: (279) [system] _202432=[]
   Exit: (279) [system] []=[]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (278) [system] _187560=[m]
   Exit: (278) [system] [m]=[m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (277) [system] _172688=[o, m]
   Exit: (277) [system] [o, m]=[o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (276) [system] _157816=[t, o, m]
   Exit: (276) [system] [t, o, m]=[t, o, m]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (275) [user] classify_and_convert_charseq('A', [t, o, m], _118708)
^  Unify: (275) [user] classify_and_convert_charseq('A', [t, o, m], _118708)
^  Call: (277) [system] setup_call_cleanup('$notrace'(_223846, _223848), once(user:catch(read_from_chars(['A', t, o, m], _118708), _223822, fail)), '$restore_trace'(_223846, _223848))
^  Unify: (277) [system] setup_call_cleanup(system:'$notrace'(_223846, _223848), system:once(user:catch(read_from_chars(['A', t, o, m], _118708), _223822, fail)), system:'$restore_trace'(_223846, _223848))
^  Call: (278) [system] sig_atomic(system:'$notrace'(_223846, _223848))
^  Exit: (277) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _118708), _223822, fail)), system:'$restore_trace'(3, -1))
   Call: (276) [system] atomic(_118708)
^  Redo: (275) [user] classify_and_convert_charseq('A', [t, o, m], _118708)
^  Unify: (275) [user] classify_and_convert_charseq('A', [t, o, m], _118708)
   Call: (276) [system] atom_chars(_118708, ['A', t, o, m])
   Exit: (276) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (275) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (273) [user] read_list(')', (0x55aefe44e2f0), _235100)
^  Unify: (273) [user] read_list(')', (0x55aefe44e2f0), _235100)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _238814)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (275) [system] ' '=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(' ')
^  Unify: (275) [user] is_like_space(' ')
   Call: (276) [system] char_type(' ', 'white')
   Exit: (276) [system] char_type(' ', 'white')
^  Exit: (275) [user] is_like_space(' ')
   Call: (275) [system] get_char((0x55aefe44e2f0), _247472)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _251100)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (276) [system] 'E'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', 'white')
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', end_of_line)
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', space)
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _268808)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (274) [system] 'E'=')'
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _235100)
   Call: (274) [system] 'E'=end_of_file
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _235100)
^  Call: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _274386)
^  Unify: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _274386)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _278100)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (276) [system] 'E'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', 'white')
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', end_of_line)
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', space)
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] get_char((0x55aefe44e2f0), _294884)
   Exit: (275) [system] get_char((0x55aefe44e2f0), 'E')
   Call: (275) [system] 'E'='('
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _274386)
   Call: (275) [system] 'E'='['
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _274386)
   Call: (275) [system] 'E'='{'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _274386)
   Call: (275) [system] 'E'='"'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _274386)
   Call: (275) [system] 'E'=!
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _274386)
   Call: (275) [system] 'E'='\''
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _274386)
   Call: (275) [system] 'E'='`'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _274386)
   Call: (275) [system] 'E'=end_of_file
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _274386)
^  Call: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', _274386)
^  Unify: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', _274386)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _313494)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _313494)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _315360)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), x)
^  Call: (277) [user] is_delimiter(x)
^  Unify: (277) [user] is_delimiter(x)
   Call: (278) [system] char_type(x, space)
^  Redo: (277) [user] is_delimiter(x)
   Call: (278) [system] arg(_321000, v('(', ')', end_of_file), x)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _313494)
   Call: (277) [system] ')'==x
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _313494)
   Call: (277) [system] get_char((0x55aefe44e2f0), x)
   Exit: (277) [system] get_char((0x55aefe44e2f0), x)
   Call: (277) [system] x=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _313494)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _328366)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _328366)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _330232)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (278) [user] is_delimiter(p)
^  Unify: (278) [user] is_delimiter(p)
   Call: (279) [system] char_type(p, space)
^  Redo: (278) [user] is_delimiter(p)
   Call: (279) [system] arg(_335872, v('(', ')', end_of_file), p)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _328366)
   Call: (278) [system] ')'==p
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _328366)
   Call: (278) [system] get_char((0x55aefe44e2f0), p)
   Exit: (278) [system] get_char((0x55aefe44e2f0), p)
   Call: (278) [system] p=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _328366)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _343238)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _343238)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _345104)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (279) [user] is_delimiter(r)
^  Unify: (279) [user] is_delimiter(r)
   Call: (280) [system] char_type(r, space)
^  Redo: (279) [user] is_delimiter(r)
   Call: (280) [system] arg(_350744, v('(', ')', end_of_file), r)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _343238)
   Call: (279) [system] ')'==r
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _343238)
   Call: (279) [system] get_char((0x55aefe44e2f0), r)
   Exit: (279) [system] get_char((0x55aefe44e2f0), r)
   Call: (279) [system] r=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _343238)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _358110)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _358110)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _359976)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (280) [user] is_delimiter(e)
^  Unify: (280) [user] is_delimiter(e)
   Call: (281) [system] char_type(e, space)
^  Redo: (280) [user] is_delimiter(e)
   Call: (281) [system] arg(_365616, v('(', ')', end_of_file), e)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _358110)
   Call: (280) [system] ')'==e
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _358110)
   Call: (280) [system] get_char((0x55aefe44e2f0), e)
   Exit: (280) [system] get_char((0x55aefe44e2f0), e)
   Call: (280) [system] e=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _358110)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _372982)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _372982)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _374848)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (281) [user] is_delimiter(s)
^  Unify: (281) [user] is_delimiter(s)
   Call: (282) [system] char_type(s, space)
^  Redo: (281) [user] is_delimiter(s)
   Call: (282) [system] arg(_380488, v('(', ')', end_of_file), s)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _372982)
   Call: (281) [system] ')'==s
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _372982)
   Call: (281) [system] get_char((0x55aefe44e2f0), s)
   Exit: (281) [system] get_char((0x55aefe44e2f0), s)
   Call: (281) [system] s=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _372982)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _387854)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _387854)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _389720)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (282) [user] is_delimiter(s)
^  Unify: (282) [user] is_delimiter(s)
   Call: (283) [system] char_type(s, space)
^  Redo: (282) [user] is_delimiter(s)
   Call: (283) [system] arg(_395360, v('(', ')', end_of_file), s)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _387854)
   Call: (282) [system] ')'==s
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _387854)
   Call: (282) [system] get_char((0x55aefe44e2f0), s)
   Exit: (282) [system] get_char((0x55aefe44e2f0), s)
   Call: (282) [system] s=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _387854)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _402726)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _402726)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _404592)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (283) [user] is_delimiter(i)
^  Unify: (283) [user] is_delimiter(i)
   Call: (284) [system] char_type(i, space)
^  Redo: (283) [user] is_delimiter(i)
   Call: (284) [system] arg(_410232, v('(', ')', end_of_file), i)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _402726)
   Call: (283) [system] ')'==i
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _402726)
   Call: (283) [system] get_char((0x55aefe44e2f0), i)
   Exit: (283) [system] get_char((0x55aefe44e2f0), i)
   Call: (283) [system] i=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _402726)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _417598)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _417598)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _419464)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (284) [user] is_delimiter(o)
^  Unify: (284) [user] is_delimiter(o)
   Call: (285) [system] char_type(o, space)
^  Redo: (284) [user] is_delimiter(o)
   Call: (285) [system] arg(_425104, v('(', ')', end_of_file), o)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _417598)
   Call: (284) [system] ')'==o
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _417598)
   Call: (284) [system] get_char((0x55aefe44e2f0), o)
   Exit: (284) [system] get_char((0x55aefe44e2f0), o)
   Call: (284) [system] o=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _417598)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _432470)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _432470)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _434336)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (285) [user] is_delimiter(n)
^  Unify: (285) [user] is_delimiter(n)
   Call: (286) [system] char_type(n, space)
^  Redo: (285) [user] is_delimiter(n)
   Call: (286) [system] arg(_439976, v('(', ')', end_of_file), n)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _432470)
   Call: (285) [system] ')'==n
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _432470)
   Call: (285) [system] get_char((0x55aefe44e2f0), n)
   Exit: (285) [system] get_char((0x55aefe44e2f0), n)
   Call: (285) [system] n=(\)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _432470)
^  Call: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _447342)
^  Unify: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _447342)
   Call: (286) [system] peek_char((0x55aefe44e2f0), _449208)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (286) [user] is_delimiter(')')
^  Unify: (286) [user] is_delimiter(')')
   Call: (287) [system] char_type(')', space)
^  Redo: (286) [user] is_delimiter(')')
   Call: (287) [system] arg(_454848, v('(', ')', end_of_file), ')')
   Exit: (287) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (286) [user] is_delimiter(')')
   Call: (286) [system] _447342=[]
   Exit: (286) [system] []=[]
^  Exit: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (285) [system] _432470=[n]
   Exit: (285) [system] [n]=[n]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (284) [system] _417598=[o, n]
   Exit: (284) [system] [o, n]=[o, n]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, n])
   Call: (283) [system] _402726=[i, o, n]
   Exit: (283) [system] [i, o, n]=[i, o, n]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, o, n])
   Call: (282) [system] _387854=[s, i, o, n]
   Exit: (282) [system] [s, i, o, n]=[s, i, o, n]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, i, o, n])
   Call: (281) [system] _372982=[s, s, i, o, n]
   Exit: (281) [system] [s, s, i, o, n]=[s, s, i, o, n]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, s, i, o, n])
   Call: (280) [system] _358110=[e, s, s, i, o, n]
   Exit: (280) [system] [e, s, s, i, o, n]=[e, s, s, i, o, n]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, s, s, i, o, n])
   Call: (279) [system] _343238=[r, e, s, s, i, o, n]
   Exit: (279) [system] [r, e, s, s, i, o, n]=[r, e, s, s, i, o, n]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, e, s, s, i, o, n])
   Call: (278) [system] _328366=[p, r, e, s, s, i, o, n]
   Exit: (278) [system] [p, r, e, s, s, i, o, n]=[p, r, e, s, s, i, o, n]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, r, e, s, s, i, o, n])
   Call: (277) [system] _313494=[x, p, r, e, s, s, i, o, n]
   Exit: (277) [system] [x, p, r, e, s, s, i, o, n]=[x, p, r, e, s, s, i, o, n]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [x, p, r, e, s, s, i, o, n])
^  Call: (276) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _274386)
^  Unify: (276) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _274386)
^  Call: (278) [system] setup_call_cleanup('$notrace'(_487388, _487390), once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _274386), _487364, fail)), '$restore_trace'(_487388, _487390))
^  Unify: (278) [system] setup_call_cleanup(system:'$notrace'(_487388, _487390), system:once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _274386), _487364, fail)), system:'$restore_trace'(_487388, _487390))
^  Call: (279) [system] sig_atomic(system:'$notrace'(_487388, _487390))
^  Exit: (278) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _274386), _487364, fail)), system:'$restore_trace'(3, -1))
   Call: (277) [system] atomic(_274386)
^  Redo: (276) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _274386)
^  Unify: (276) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _274386)
   Call: (277) [system] atom_chars(_274386, ['E', x, p, r, e, s, s, i, o, n])
   Exit: (277) [system] atom_chars('Expression', ['E', x, p, r, e, s, s, i, o, n])
^  Exit: (276) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], 'Expression')
^  Exit: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', 'Expression')
^  Exit: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Expression')
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _498642)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _498642)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _502356)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (276) [system] ')'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', 'white')
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', end_of_line)
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', space)
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _519140)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (275) [system] ')'=')'
   Exit: (275) [system] ')'=')'
   Call: (275) [system] get_char((0x55aefe44e2f0), _522930)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ')')
   Call: (275) [system] _6012=[]
   Exit: (275) [system] []=[]
^  Exit: (274) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (274) [system] _6006=['Expression']
   Exit: (274) [system] ['Expression']=['Expression']
^  Exit: (273) [user] read_list(')', (0x55aefe44e2f0), ['Expression'])
   Call: (273) [system] _6000=['Atom', 'Expression']
   Exit: (273) [system] ['Atom', 'Expression']=['Atom', 'Expression']
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Expression'])
   Call: (272) [system] _5992=[->, 'Atom', 'Expression']
   Exit: (272) [system] [->, 'Atom', 'Expression']=[->, 'Atom', 'Expression']
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [->, 'Atom', 'Expression'])
^  Exit: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), [->, 'Atom', 'Expression'])
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _18866)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _18866)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _22580)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (272) [system] ')'=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', 'white')
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', end_of_line)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', space)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _39364)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (271) [system] ')'=')'
   Exit: (271) [system] ')'=')'
   Call: (271) [system] get_char((0x55aefe44e2f0), _43154)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ')')
   Call: (271) [system] _18866=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (270) [system] _5988=[[->, 'Atom', 'Expression']]
   Exit: (270) [system] [[->, 'Atom', 'Expression']]=[[->, 'Atom', 'Expression']]
^  Exit: (269) [user] read_list(')', (0x55aefe44e2f0), [[->, 'Atom', 'Expression']])
   Call: (269) [system] _5982=['collapse-bind', [->, 'Atom', 'Expression']]
   Exit: (269) [system] ['collapse-bind', [->, 'Atom', 'Expression']]=['collapse-bind', [->, 'Atom', 'Expression']]
^  Exit: (268) [user] read_list(')', (0x55aefe44e2f0), ['collapse-bind', [->, 'Atom', 'Expression']])
   Call: (268) [system] _5942=[:, 'collapse-bind', [->, 'Atom', 'Expression']]
   Exit: (268) [system] [:, 'collapse-bind', [->, 'Atom', 'Expression']]=[:, 'collapse-bind', [->, 'Atom', 'Expression']]
^  Exit: (267) [user] read_list(')', (0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Exit: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Exit: (265) [user] read_sexpr((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Call: (265) [user] assertz(metta_file_comment(17, 0, 503, [:, 'collapse-bind', [->, 'Atom', 'Expression']], '$stream_position'(503, 17, 0, 503)))
^  Exit: (265) [user] assertz(metta_file_comment(17, 0, 503, [:, 'collapse-bind', [->, 'Atom', 'Expression']], '$stream_position'(503, 17, 0, 503)))
^  Exit: (263) [system] once(user:(read_position((0x55aefe44e2f0), 17, 0, 503, '$stream_position'(503, 17, 0, 503)), read_sexpr((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Expression']]), assertz(metta_file_comment(17, 0, 503, [:, 'collapse-bind', [->, 'Atom', 'Expression']], '$stream_position'(503, 17, 0, 503)))))
   Call: (263) [system] fail
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Call: (263) [user] retract(metta_file_comment(_63528, _63530, _63532, _63534, _63536))
^  Exit: (263) [user] retract(metta_file_comment(17, 0, 503, [:, 'collapse-bind', [->, 'Atom', 'Expression']], '$stream_position'(503, 17, 0, 503)))
^  Call: (263) [user] trly(untyped_to_metta, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _5908)
^  Call: (264) [user] once(call(untyped_to_metta, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _67314))
^  Unify: (264) [system] once(user:call(untyped_to_metta, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _67314))
^  Call: (265) [user] call(untyped_to_metta, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _67314)
^  Unify: (265) [system] call(user:untyped_to_metta, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _67314)
^  Call: (266) [user] untyped_to_metta([:, 'collapse-bind', [->, 'Atom', 'Expression']], _67314)
^  Unify: (266) [user] untyped_to_metta([:, 'collapse-bind', [->, 'Atom', 'Expression']], _67314)
^  Call: (267) [user] must_det_ll(trly(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _72926))
^  Unify: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _72926))
^  Call: (268) [user] once(user:trly(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _72926))
^  Unify: (268) [system] once(user:trly(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _72926))
^  Call: (269) [user] trly(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _72926)
^  Unify: (269) [user] trly(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _72926)
^  Call: (270) [user] once(call(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512))
^  Unify: (270) [system] once(user:call(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512))
^  Call: (271) [user] call(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512)
^  Unify: (271) [system] call(user:mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512)
^  Call: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512)
^  Unify: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512)
   Call: (273) [system] var([:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Redo: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512)
^  Unify: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Expression']], '$VAR'(_85972))
   Call: (273) [system] atom([:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Redo: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512)
^  Unify: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512)
   Call: (273) [system] [:, 'collapse-bind', [->, 'Atom', 'Expression']]==true
^  Redo: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512)
^  Unify: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512)
   Call: (273) [system] [:, 'collapse-bind', [->, 'Atom', 'Expression']]==false
^  Redo: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512)
^  Unify: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512)
   Call: (273) [system] (:)=='['
^  Redo: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512)
^  Unify: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512)
   Call: (273) [system] (:)=='{'
^  Redo: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512)
^  Unify: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512)
   Call: (273) [system] is_list(['collapse-bind', [->, 'Atom', 'Expression']])
   Exit: (273) [system] is_list(['collapse-bind', [->, 'Atom', 'Expression']])
   Call: (273) [lists] lists:last(['collapse-bind', [->, 'Atom', 'Expression']], _102666)
   Unify: (273) [lists] lists:last(['collapse-bind', [->, 'Atom', 'Expression']], _102666)
   Call: (274) [lists] lists:last_([[->, 'Atom', 'Expression']], 'collapse-bind', _102666)
   Unify: (274) [lists] lists:last_([[->, 'Atom', 'Expression']], 'collapse-bind', _102666)
   Call: (275) [lists] lists:last_([], [->, 'Atom', 'Expression'], _102666)
   Unify: (275) [lists] lists:last_([], [->, 'Atom', 'Expression'], [->, 'Atom', 'Expression'])
   Exit: (275) [lists] lists:last_([], [->, 'Atom', 'Expression'], [->, 'Atom', 'Expression'])
   Exit: (274) [lists] lists:last_([[->, 'Atom', 'Expression']], 'collapse-bind', [->, 'Atom', 'Expression'])
   Exit: (273) [lists] lists:last(['collapse-bind', [->, 'Atom', 'Expression']], [->, 'Atom', 'Expression'])
   Call: (273) [system] [->, 'Atom', 'Expression']=='}'
^  Redo: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512)
^  Unify: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512)
   Call: (273) [system] [:, 'collapse-bind', [->, 'Atom', 'Expression']]==[_113830, _113836]
^  Redo: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512)
^  Unify: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512)
   Call: (273) [system] fail
^  Redo: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512)
^  Unify: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512)
   Call: (273) [system] is_list([:, 'collapse-bind', [->, 'Atom', 'Expression']])
   Exit: (273) [system] is_list([:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Call: (273) [user] apply:maplist(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512)
^  Unify: (273) [apply] apply:maplist(user:mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512)
   Call: (274) [apply] apply:maplist_([:, 'collapse-bind', [->, 'Atom', 'Expression']], _78512, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([:, 'collapse-bind', [->, 'Atom', 'Expression']], [_124060|_124062], user:mfix_vars1)
^  Call: (275) [user] mfix_vars1(:, _124060)
^  Unify: (275) [user] mfix_vars1(:, _124060)
   Call: (276) [system] var(:)
^  Redo: (275) [user] mfix_vars1(:, _124060)
^  Unify: (275) [user] mfix_vars1(:, '$VAR'(_128706))
   Call: (276) [system] atom(:)
   Exit: (276) [system] atom(:)
^  Call: (276) [user] symbol_concat($, _131484, :)
^  Unify: (276) [user] symbol_concat($, _131484, :)
   Call: (277) [system] atom_concat($, _131484, :)
   Fail: (277) [system] atom_concat($, _131484, :)
^  Fail: (276) [user] symbol_concat($, _131484, :)
^  Redo: (275) [user] mfix_vars1(:, _124060)
^  Unify: (275) [user] mfix_vars1(:, _124060)
   Call: (276) [system] (:)==true
^  Redo: (275) [user] mfix_vars1(:, _124060)
^  Unify: (275) [user] mfix_vars1(:, _124060)
   Call: (276) [system] (:)==false
^  Redo: (275) [user] mfix_vars1(:, _124060)
^  Unify: (275) [user] mfix_vars1(:, _124060)
   Call: (276) [system] (:)==[_143572, _143578]
^  Redo: (275) [user] mfix_vars1(:, _124060)
^  Unify: (275) [user] mfix_vars1(:, _124060)
   Call: (276) [system] is_list(:)
^  Redo: (275) [user] mfix_vars1(:, _124060)
^  Unify: (275) [user] mfix_vars1(:, _124060)
   Call: (276) [system] string(:)
^  Redo: (275) [user] mfix_vars1(:, _124060)
^  Unify: (275) [user] mfix_vars1(:, _124060)
   Call: (276) [system] compound(:)
^  Redo: (275) [user] mfix_vars1(:, _124060)
^  Unify: (275) [user] mfix_vars1(:, _124060)
^  Call: (276) [user] symbol(:)
^  Unify: (276) [user] symbol(:)
   Call: (277) [system] atom(:)
   Exit: (277) [system] atom(:)
^  Exit: (276) [user] symbol(:)
^  Unify: (275) [user] mfix_vars1(:, :)
^  Exit: (275) [user] mfix_vars1(:, :)
   Call: (275) [apply] apply:maplist_(['collapse-bind', [->, 'Atom', 'Expression']], _124062, user:mfix_vars1)
   Unify: (275) [apply] apply:maplist_(['collapse-bind', [->, 'Atom', 'Expression']], [_162116|_162118], user:mfix_vars1)
^  Call: (276) [user] mfix_vars1('collapse-bind', _162116)
^  Unify: (276) [user] mfix_vars1('collapse-bind', _162116)
   Call: (277) [system] var('collapse-bind')
^  Redo: (276) [user] mfix_vars1('collapse-bind', _162116)
^  Unify: (276) [user] mfix_vars1('collapse-bind', '$VAR'(_166762))
   Call: (277) [system] atom('collapse-bind')
   Exit: (277) [system] atom('collapse-bind')
^  Call: (277) [user] symbol_concat($, _169540, 'collapse-bind')
^  Unify: (277) [user] symbol_concat($, _169540, 'collapse-bind')
   Call: (278) [system] atom_concat($, _169540, 'collapse-bind')
   Fail: (278) [system] atom_concat($, _169540, 'collapse-bind')
^  Fail: (277) [user] symbol_concat($, _169540, 'collapse-bind')
^  Redo: (276) [user] mfix_vars1('collapse-bind', _162116)
^  Unify: (276) [user] mfix_vars1('collapse-bind', _162116)
   Call: (277) [system] 'collapse-bind'==true
^  Redo: (276) [user] mfix_vars1('collapse-bind', _162116)
^  Unify: (276) [user] mfix_vars1('collapse-bind', _162116)
   Call: (277) [system] 'collapse-bind'==false
^  Redo: (276) [user] mfix_vars1('collapse-bind', _162116)
^  Unify: (276) [user] mfix_vars1('collapse-bind', _162116)
   Call: (277) [system] 'collapse-bind'==[_181628, _181634]
^  Redo: (276) [user] mfix_vars1('collapse-bind', _162116)
^  Unify: (276) [user] mfix_vars1('collapse-bind', _162116)
   Call: (277) [system] is_list('collapse-bind')
^  Redo: (276) [user] mfix_vars1('collapse-bind', _162116)
^  Unify: (276) [user] mfix_vars1('collapse-bind', _162116)
   Call: (277) [system] string('collapse-bind')
^  Redo: (276) [user] mfix_vars1('collapse-bind', _162116)
^  Unify: (276) [user] mfix_vars1('collapse-bind', _162116)
   Call: (277) [system] compound('collapse-bind')
^  Redo: (276) [user] mfix_vars1('collapse-bind', _162116)
^  Unify: (276) [user] mfix_vars1('collapse-bind', _162116)
^  Call: (277) [user] symbol('collapse-bind')
^  Unify: (277) [user] symbol('collapse-bind')
   Call: (278) [system] atom('collapse-bind')
   Exit: (278) [system] atom('collapse-bind')
^  Exit: (277) [user] symbol('collapse-bind')
^  Unify: (276) [user] mfix_vars1('collapse-bind', 'collapse-bind')
^  Exit: (276) [user] mfix_vars1('collapse-bind', 'collapse-bind')
   Call: (276) [apply] apply:maplist_([[->, 'Atom', 'Expression']], _162118, user:mfix_vars1)
   Unify: (276) [apply] apply:maplist_([[->, 'Atom', 'Expression']], [_200172|_200174], user:mfix_vars1)
^  Call: (277) [user] mfix_vars1([->, 'Atom', 'Expression'], _200172)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Expression'], _200172)
   Call: (278) [system] var([->, 'Atom', 'Expression'])
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Expression'], _200172)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Expression'], '$VAR'(_204818))
   Call: (278) [system] atom([->, 'Atom', 'Expression'])
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Expression'], _200172)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Expression'], _200172)
   Call: (278) [system] [->, 'Atom', 'Expression']==true
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Expression'], _200172)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Expression'], _200172)
   Call: (278) [system] [->, 'Atom', 'Expression']==false
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Expression'], _200172)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Expression'], _200172)
   Call: (278) [system] (->)=='['
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Expression'], _200172)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Expression'], _200172)
   Call: (278) [system] (->)=='{'
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Expression'], _200172)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Expression'], _200172)
   Call: (278) [system] is_list(['Atom', 'Expression'])
   Exit: (278) [system] is_list(['Atom', 'Expression'])
   Call: (278) [lists] lists:last(['Atom', 'Expression'], _221512)
   Unify: (278) [lists] lists:last(['Atom', 'Expression'], _221512)
   Call: (279) [lists] lists:last_(['Expression'], 'Atom', _221512)
   Unify: (279) [lists] lists:last_(['Expression'], 'Atom', _221512)
   Call: (280) [lists] lists:last_([], 'Expression', _221512)
   Unify: (280) [lists] lists:last_([], 'Expression', 'Expression')
   Exit: (280) [lists] lists:last_([], 'Expression', 'Expression')
   Exit: (279) [lists] lists:last_(['Expression'], 'Atom', 'Expression')
   Exit: (278) [lists] lists:last(['Atom', 'Expression'], 'Expression')
   Call: (278) [system] 'Expression'=='}'
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Expression'], _200172)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Expression'], _200172)
   Call: (278) [system] [->, 'Atom', 'Expression']==[_232676, _232682]
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Expression'], _200172)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Expression'], _200172)
   Call: (278) [system] fail
^  Redo: (277) [user] mfix_vars1([->, 'Atom', 'Expression'], _200172)
^  Unify: (277) [user] mfix_vars1([->, 'Atom', 'Expression'], _200172)
   Call: (278) [system] is_list([->, 'Atom', 'Expression'])
   Exit: (278) [system] is_list([->, 'Atom', 'Expression'])
^  Call: (278) [user] apply:maplist(mfix_vars1, [->, 'Atom', 'Expression'], _200172)
^  Unify: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Expression'], _200172)
   Call: (279) [apply] apply:maplist_([->, 'Atom', 'Expression'], _200172, user:mfix_vars1)
   Unify: (279) [apply] apply:maplist_([->, 'Atom', 'Expression'], [_242906|_242908], user:mfix_vars1)
^  Call: (280) [user] mfix_vars1(->, _242906)
^  Unify: (280) [user] mfix_vars1(->, _242906)
   Call: (281) [system] var(->)
^  Redo: (280) [user] mfix_vars1(->, _242906)
^  Unify: (280) [user] mfix_vars1(->, '$VAR'(_247552))
   Call: (281) [system] atom(->)
   Exit: (281) [system] atom(->)
^  Call: (281) [user] symbol_concat($, _250330, ->)
^  Unify: (281) [user] symbol_concat($, _250330, ->)
   Call: (282) [system] atom_concat($, _250330, ->)
   Fail: (282) [system] atom_concat($, _250330, ->)
^  Fail: (281) [user] symbol_concat($, _250330, ->)
^  Redo: (280) [user] mfix_vars1(->, _242906)
^  Unify: (280) [user] mfix_vars1(->, _242906)
   Call: (281) [system] (->)==true
^  Redo: (280) [user] mfix_vars1(->, _242906)
^  Unify: (280) [user] mfix_vars1(->, _242906)
   Call: (281) [system] (->)==false
^  Redo: (280) [user] mfix_vars1(->, _242906)
^  Unify: (280) [user] mfix_vars1(->, _242906)
   Call: (281) [system] (->)==[_262418, _262424]
^  Redo: (280) [user] mfix_vars1(->, _242906)
^  Unify: (280) [user] mfix_vars1(->, _242906)
   Call: (281) [system] is_list(->)
^  Redo: (280) [user] mfix_vars1(->, _242906)
^  Unify: (280) [user] mfix_vars1(->, _242906)
   Call: (281) [system] string(->)
^  Redo: (280) [user] mfix_vars1(->, _242906)
^  Unify: (280) [user] mfix_vars1(->, _242906)
   Call: (281) [system] compound(->)
^  Redo: (280) [user] mfix_vars1(->, _242906)
^  Unify: (280) [user] mfix_vars1(->, _242906)
^  Call: (281) [user] symbol(->)
^  Unify: (281) [user] symbol(->)
   Call: (282) [system] atom(->)
   Exit: (282) [system] atom(->)
^  Exit: (281) [user] symbol(->)
^  Unify: (280) [user] mfix_vars1(->, ->)
^  Exit: (280) [user] mfix_vars1(->, ->)
   Call: (280) [apply] apply:maplist_(['Atom', 'Expression'], _242908, user:mfix_vars1)
   Unify: (280) [apply] apply:maplist_(['Atom', 'Expression'], [_280962|_280964], user:mfix_vars1)
^  Call: (281) [user] mfix_vars1('Atom', _280962)
^  Unify: (281) [user] mfix_vars1('Atom', _280962)
   Call: (282) [system] var('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _280962)
^  Unify: (281) [user] mfix_vars1('Atom', '$VAR'(_285608))
   Call: (282) [system] atom('Atom')
   Exit: (282) [system] atom('Atom')
^  Call: (282) [user] symbol_concat($, _288386, 'Atom')
^  Unify: (282) [user] symbol_concat($, _288386, 'Atom')
   Call: (283) [system] atom_concat($, _288386, 'Atom')
   Fail: (283) [system] atom_concat($, _288386, 'Atom')
^  Fail: (282) [user] symbol_concat($, _288386, 'Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _280962)
^  Unify: (281) [user] mfix_vars1('Atom', _280962)
   Call: (282) [system] 'Atom'==true
^  Redo: (281) [user] mfix_vars1('Atom', _280962)
^  Unify: (281) [user] mfix_vars1('Atom', _280962)
   Call: (282) [system] 'Atom'==false
^  Redo: (281) [user] mfix_vars1('Atom', _280962)
^  Unify: (281) [user] mfix_vars1('Atom', _280962)
   Call: (282) [system] 'Atom'==[_300474, _300480]
^  Redo: (281) [user] mfix_vars1('Atom', _280962)
^  Unify: (281) [user] mfix_vars1('Atom', _280962)
   Call: (282) [system] is_list('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _280962)
^  Unify: (281) [user] mfix_vars1('Atom', _280962)
   Call: (282) [system] string('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _280962)
^  Unify: (281) [user] mfix_vars1('Atom', _280962)
   Call: (282) [system] compound('Atom')
^  Redo: (281) [user] mfix_vars1('Atom', _280962)
^  Unify: (281) [user] mfix_vars1('Atom', _280962)
^  Call: (282) [user] symbol('Atom')
^  Unify: (282) [user] symbol('Atom')
   Call: (283) [system] atom('Atom')
   Exit: (283) [system] atom('Atom')
^  Exit: (282) [user] symbol('Atom')
^  Unify: (281) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (281) [user] mfix_vars1('Atom', 'Atom')
   Call: (281) [apply] apply:maplist_(['Expression'], _280964, user:mfix_vars1)
   Unify: (281) [apply] apply:maplist_(['Expression'], [_319018|_319020], user:mfix_vars1)
^  Call: (282) [user] mfix_vars1('Expression', _319018)
^  Unify: (282) [user] mfix_vars1('Expression', _319018)
   Call: (283) [system] var('Expression')
^  Redo: (282) [user] mfix_vars1('Expression', _319018)
^  Unify: (282) [user] mfix_vars1('Expression', '$VAR'(_323664))
   Call: (283) [system] atom('Expression')
   Exit: (283) [system] atom('Expression')
^  Call: (283) [user] symbol_concat($, _326442, 'Expression')
^  Unify: (283) [user] symbol_concat($, _326442, 'Expression')
   Call: (284) [system] atom_concat($, _326442, 'Expression')
   Fail: (284) [system] atom_concat($, _326442, 'Expression')
^  Fail: (283) [user] symbol_concat($, _326442, 'Expression')
^  Redo: (282) [user] mfix_vars1('Expression', _319018)
^  Unify: (282) [user] mfix_vars1('Expression', _319018)
   Call: (283) [system] 'Expression'==true
^  Redo: (282) [user] mfix_vars1('Expression', _319018)
^  Unify: (282) [user] mfix_vars1('Expression', _319018)
   Call: (283) [system] 'Expression'==false
^  Redo: (282) [user] mfix_vars1('Expression', _319018)
^  Unify: (282) [user] mfix_vars1('Expression', _319018)
   Call: (283) [system] 'Expression'==[_338530, _338536]
^  Redo: (282) [user] mfix_vars1('Expression', _319018)
^  Unify: (282) [user] mfix_vars1('Expression', _319018)
   Call: (283) [system] is_list('Expression')
^  Redo: (282) [user] mfix_vars1('Expression', _319018)
^  Unify: (282) [user] mfix_vars1('Expression', _319018)
   Call: (283) [system] string('Expression')
^  Redo: (282) [user] mfix_vars1('Expression', _319018)
^  Unify: (282) [user] mfix_vars1('Expression', _319018)
   Call: (283) [system] compound('Expression')
^  Redo: (282) [user] mfix_vars1('Expression', _319018)
^  Unify: (282) [user] mfix_vars1('Expression', _319018)
^  Call: (283) [user] symbol('Expression')
^  Unify: (283) [user] symbol('Expression')
   Call: (284) [system] atom('Expression')
   Exit: (284) [system] atom('Expression')
^  Exit: (283) [user] symbol('Expression')
^  Unify: (282) [user] mfix_vars1('Expression', 'Expression')
^  Exit: (282) [user] mfix_vars1('Expression', 'Expression')
   Call: (282) [apply] apply:maplist_([], _319020, user:mfix_vars1)
   Unify: (282) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (282) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (281) [apply] apply:maplist_(['Expression'], ['Expression'], user:mfix_vars1)
   Exit: (280) [apply] apply:maplist_(['Atom', 'Expression'], ['Atom', 'Expression'], user:mfix_vars1)
   Exit: (279) [apply] apply:maplist_([->, 'Atom', 'Expression'], [->, 'Atom', 'Expression'], user:mfix_vars1)
^  Exit: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Expression'], [->, 'Atom', 'Expression'])
^  Exit: (277) [user] mfix_vars1([->, 'Atom', 'Expression'], [->, 'Atom', 'Expression'])
   Call: (277) [apply] apply:maplist_([], _200174, user:mfix_vars1)
   Unify: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (276) [apply] apply:maplist_([[->, 'Atom', 'Expression']], [[->, 'Atom', 'Expression']], user:mfix_vars1)
   Exit: (275) [apply] apply:maplist_(['collapse-bind', [->, 'Atom', 'Expression']], ['collapse-bind', [->, 'Atom', 'Expression']], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']], user:mfix_vars1)
^  Exit: (273) [apply] apply:maplist(user:mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Exit: (272) [user] mfix_vars1([:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Exit: (271) [system] call(user:mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Exit: (270) [system] once(user:call(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']]))
   Call: (270) [system] [:, 'collapse-bind', [->, 'Atom', 'Expression']]\=@=[:, 'collapse-bind', [->, 'Atom', 'Expression']]
^  Redo: (269) [user] trly(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _72926)
^  Unify: (269) [user] trly(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Exit: (269) [user] trly(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Exit: (268) [system] once(user:trly(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']]))
^  Exit: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _378508))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _378508))
^  Call: (268) [user] once(user:trly(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _378508))
^  Unify: (268) [system] once(user:trly(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _378508))
^  Call: (269) [user] trly(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _378508)
^  Unify: (269) [user] trly(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _378508)
^  Call: (270) [user] once(call(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _384094))
^  Unify: (270) [system] once(user:call(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _384094))
^  Call: (271) [user] call(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _384094)
^  Unify: (271) [system] call(user:cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _384094)
^  Call: (272) [user] cons_to_c([:, 'collapse-bind', [->, 'Atom', 'Expression']], _384094)
^  Unify: (272) [user] cons_to_c([:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_c([:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Exit: (271) [system] call(user:cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Exit: (270) [system] once(user:call(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']]))
   Call: (270) [system] [:, 'collapse-bind', [->, 'Atom', 'Expression']]\=@=[:, 'collapse-bind', [->, 'Atom', 'Expression']]
^  Redo: (269) [user] trly(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _378508)
^  Unify: (269) [user] trly(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Exit: (269) [user] trly(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Exit: (268) [system] once(user:trly(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_c, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _67314))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _67314))
^  Call: (268) [user] once(user:trly(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _67314))
^  Unify: (268) [system] once(user:trly(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _67314))
^  Call: (269) [user] trly(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _67314)
^  Unify: (269) [user] trly(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _67314)
^  Call: (270) [user] once(call(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _406414))
^  Unify: (270) [system] once(user:call(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _406414))
^  Call: (271) [user] call(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _406414)
^  Unify: (271) [system] call(user:cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _406414)
^  Call: (272) [user] cons_to_l([:, 'collapse-bind', [->, 'Atom', 'Expression']], _406414)
^  Unify: (272) [user] cons_to_l([:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_l([:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Exit: (271) [system] call(user:cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Exit: (270) [system] once(user:call(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']]))
   Call: (270) [system] [:, 'collapse-bind', [->, 'Atom', 'Expression']]\=@=[:, 'collapse-bind', [->, 'Atom', 'Expression']]
^  Redo: (269) [user] trly(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _67314)
^  Unify: (269) [user] trly(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Exit: (269) [user] trly(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Exit: (268) [system] once(user:trly(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_l, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']]))
^  Exit: (266) [user] untyped_to_metta([:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Exit: (265) [system] call(user:untyped_to_metta, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Exit: (264) [system] once(user:call(untyped_to_metta, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']]))
   Call: (264) [system] [:, 'collapse-bind', [->, 'Atom', 'Expression']]\=@=[:, 'collapse-bind', [->, 'Atom', 'Expression']]
^  Redo: (263) [user] trly(untyped_to_metta, [:, 'collapse-bind', [->, 'Atom', 'Expression']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Exit: (263) [user] trly(untyped_to_metta, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Exit: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Expression']])
   Call: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Expression']])))
   Unify: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Expression']])))
   Exit: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Expression']])))
^  Exit: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Exit: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Expression']])
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Expression']])))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Expression']])))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Expression']])))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), [:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Call: (257) [user] subst_vars([:, 'collapse-bind', [->, 'Atom', 'Expression']], _440722, [], _440724)
^  Unify: (257) [user] subst_vars([:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']], [], [])
   Call: (258) [system] var([:, 'collapse-bind', [->, 'Atom', 'Expression']])
^  Redo: (257) [user] subst_vars([:, 'collapse-bind', [->, 'Atom', 'Expression']], _440722, [], _440724)
^  Unify: (257) [user] subst_vars([:, 'collapse-bind', [->, 'Atom', 'Expression']], [_444460|_444462], [], _440724)
^  Call: (258) [user] subst_vars(:, _444460, [], _445400)
^  Unify: (258) [user] subst_vars(:, :, [], [])
   Call: (259) [system] var(:)
^  Redo: (258) [user] subst_vars(:, _444460, [], _445400)
^  Unify: (258) [user] subst_vars(:, _444460, [], _445400)
   Call: (259) [system] atom(:)
   Exit: (259) [system] atom(:)
^  Call: (259) [user] symbol_concat($, _451918, :)
^  Unify: (259) [user] symbol_concat($, _451918, :)
   Call: (260) [system] atom_concat($, _451918, :)
   Fail: (260) [system] atom_concat($, _451918, :)
^  Fail: (259) [user] symbol_concat($, _451918, :)
^  Redo: (258) [user] subst_vars(:, _444460, [], _445400)
^  Unify: (258) [user] subst_vars(:, _444460, [], _445400)
   Call: (259) [system] compound(:)
^  Redo: (258) [user] subst_vars(:, _444460, [], _445400)
^  Unify: (258) [user] subst_vars(:, :, [], [])
^  Exit: (258) [user] subst_vars(:, :, [], [])
^  Call: (258) [user] subst_vars(['collapse-bind', [->, 'Atom', 'Expression']], _444462, [], _440724)
^  Unify: (258) [user] subst_vars(['collapse-bind', [->, 'Atom', 'Expression']], ['collapse-bind', [->, 'Atom', 'Expression']], [], [])
   Call: (259) [system] var(['collapse-bind', [->, 'Atom', 'Expression']])
^  Redo: (258) [user] subst_vars(['collapse-bind', [->, 'Atom', 'Expression']], _444462, [], _440724)
^  Unify: (258) [user] subst_vars(['collapse-bind', [->, 'Atom', 'Expression']], [_465918|_465920], [], _440724)
^  Call: (259) [user] subst_vars('collapse-bind', _465918, [], _466858)
^  Unify: (259) [user] subst_vars('collapse-bind', 'collapse-bind', [], [])
   Call: (260) [system] var('collapse-bind')
^  Redo: (259) [user] subst_vars('collapse-bind', _465918, [], _466858)
^  Unify: (259) [user] subst_vars('collapse-bind', _465918, [], _466858)
   Call: (260) [system] atom('collapse-bind')
   Exit: (260) [system] atom('collapse-bind')
^  Call: (260) [user] symbol_concat($, _473376, 'collapse-bind')
^  Unify: (260) [user] symbol_concat($, _473376, 'collapse-bind')
   Call: (261) [system] atom_concat($, _473376, 'collapse-bind')
   Fail: (261) [system] atom_concat($, _473376, 'collapse-bind')
^  Fail: (260) [user] symbol_concat($, _473376, 'collapse-bind')
^  Redo: (259) [user] subst_vars('collapse-bind', _465918, [], _466858)
^  Unify: (259) [user] subst_vars('collapse-bind', _465918, [], _466858)
   Call: (260) [system] compound('collapse-bind')
^  Redo: (259) [user] subst_vars('collapse-bind', _465918, [], _466858)
^  Unify: (259) [user] subst_vars('collapse-bind', 'collapse-bind', [], [])
^  Exit: (259) [user] subst_vars('collapse-bind', 'collapse-bind', [], [])
^  Call: (259) [user] subst_vars([[->, 'Atom', 'Expression']], _465920, [], _440724)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Expression']], [[->, 'Atom', 'Expression']], [], [])
   Call: (260) [system] var([[->, 'Atom', 'Expression']])
^  Redo: (259) [user] subst_vars([[->, 'Atom', 'Expression']], _465920, [], _440724)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Expression']], [_487376|_487378], [], _440724)
^  Call: (260) [user] subst_vars([->, 'Atom', 'Expression'], _487376, [], _488316)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Expression'], [->, 'Atom', 'Expression'], [], [])
   Call: (261) [system] var([->, 'Atom', 'Expression'])
^  Redo: (260) [user] subst_vars([->, 'Atom', 'Expression'], _487376, [], _488316)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Expression'], [_492052|_492054], [], _488316)
^  Call: (261) [user] subst_vars(->, _492052, [], _492992)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
   Call: (262) [system] var(->)
^  Redo: (261) [user] subst_vars(->, _492052, [], _492992)
^  Unify: (261) [user] subst_vars(->, _492052, [], _492992)
   Call: (262) [system] atom(->)
   Exit: (262) [system] atom(->)
^  Call: (262) [user] symbol_concat($, _499510, ->)
^  Unify: (262) [user] symbol_concat($, _499510, ->)
   Call: (263) [system] atom_concat($, _499510, ->)
   Fail: (263) [system] atom_concat($, _499510, ->)
^  Fail: (262) [user] symbol_concat($, _499510, ->)
^  Redo: (261) [user] subst_vars(->, _492052, [], _492992)
^  Unify: (261) [user] subst_vars(->, _492052, [], _492992)
   Call: (262) [system] compound(->)
^  Redo: (261) [user] subst_vars(->, _492052, [], _492992)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
^  Exit: (261) [user] subst_vars(->, ->, [], [])
^  Call: (261) [user] subst_vars(['Atom', 'Expression'], _492054, [], _488316)
^  Unify: (261) [user] subst_vars(['Atom', 'Expression'], ['Atom', 'Expression'], [], [])
   Call: (262) [system] var(['Atom', 'Expression'])
^  Redo: (261) [user] subst_vars(['Atom', 'Expression'], _492054, [], _488316)
^  Unify: (261) [user] subst_vars(['Atom', 'Expression'], [_513510|_513512], [], _488316)
^  Call: (262) [user] subst_vars('Atom', _513510, [], _514450)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (263) [system] var('Atom')
^  Redo: (262) [user] subst_vars('Atom', _513510, [], _514450)
^  Unify: (262) [user] subst_vars('Atom', _513510, [], _514450)
   Call: (263) [system] atom('Atom')
   Exit: (263) [system] atom('Atom')
^  Call: (263) [user] symbol_concat($, _520968, 'Atom')
^  Unify: (263) [user] symbol_concat($, _520968, 'Atom')
   Call: (264) [system] atom_concat($, _520968, 'Atom')
   Fail: (264) [system] atom_concat($, _5990, 'Atom')
^  Fail: (263) [user] symbol_concat($, _5990, 'Atom')
^  Redo: (262) [user] subst_vars('Atom', _5984, [], _5988)
^  Unify: (262) [user] subst_vars('Atom', _5984, [], _5988)
   Call: (263) [system] compound('Atom')
^  Redo: (262) [user] subst_vars('Atom', _5984, [], _5988)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (262) [user] subst_vars(['Expression'], _5986, [], _5972)
^  Unify: (262) [user] subst_vars(['Expression'], ['Expression'], [], [])
   Call: (263) [system] var(['Expression'])
^  Redo: (262) [user] subst_vars(['Expression'], _5986, [], _5972)
^  Unify: (262) [user] subst_vars(['Expression'], [_17012|_17014], [], _5972)
^  Call: (263) [user] subst_vars('Expression', _17012, [], _17952)
^  Unify: (263) [user] subst_vars('Expression', 'Expression', [], [])
   Call: (264) [system] var('Expression')
^  Redo: (263) [user] subst_vars('Expression', _17012, [], _17952)
^  Unify: (263) [user] subst_vars('Expression', _17012, [], _17952)
   Call: (264) [system] atom('Expression')
   Exit: (264) [system] atom('Expression')
^  Call: (264) [user] symbol_concat($, _24470, 'Expression')
^  Unify: (264) [user] symbol_concat($, _24470, 'Expression')
   Call: (265) [system] atom_concat($, _24470, 'Expression')
   Fail: (265) [system] atom_concat($, _24470, 'Expression')
^  Fail: (264) [user] symbol_concat($, _24470, 'Expression')
^  Redo: (263) [user] subst_vars('Expression', _17012, [], _17952)
^  Unify: (263) [user] subst_vars('Expression', _17012, [], _17952)
   Call: (264) [system] compound('Expression')
^  Redo: (263) [user] subst_vars('Expression', _17012, [], _17952)
^  Unify: (263) [user] subst_vars('Expression', 'Expression', [], [])
^  Exit: (263) [user] subst_vars('Expression', 'Expression', [], [])
^  Call: (263) [user] subst_vars([], _17014, [], _5972)
^  Unify: (263) [user] subst_vars([], [], [], [])
   Call: (264) [system] var([])
^  Redo: (263) [user] subst_vars([], _17014, [], _5972)
^  Unify: (263) [user] subst_vars([], [], [], [])
^  Exit: (263) [user] subst_vars([], [], [], [])
^  Exit: (262) [user] subst_vars(['Expression'], ['Expression'], [], [])
^  Exit: (261) [user] subst_vars(['Atom', 'Expression'], ['Atom', 'Expression'], [], [])
^  Exit: (260) [user] subst_vars([->, 'Atom', 'Expression'], [->, 'Atom', 'Expression'], [], [])
^  Call: (260) [user] subst_vars([], _5970, [], _5948)
^  Unify: (260) [user] subst_vars([], [], [], [])
   Call: (261) [system] var([])
^  Redo: (260) [user] subst_vars([], _5970, [], _5948)
^  Unify: (260) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([], [], [], [])
^  Exit: (259) [user] subst_vars([[->, 'Atom', 'Expression']], [[->, 'Atom', 'Expression']], [], [])
^  Exit: (258) [user] subst_vars(['collapse-bind', [->, 'Atom', 'Expression']], ['collapse-bind', [->, 'Atom', 'Expression']], [], [])
^  Exit: (257) [user] subst_vars([:, 'collapse-bind', [->, 'Atom', 'Expression']], [:, 'collapse-bind', [->, 'Atom', 'Expression']], [], [])
   Call: (257) [system] _51560=metta_file_buffer(+, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(502, 16, 42, 502))
   Exit: (257) [system] metta_file_buffer(+, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(502, 16, 42, 502))=metta_file_buffer(+, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(502, 16, 42, 502))
^  Call: (257) [user] assertz(metta_file_buffer(+, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(502, 16, 42, 502)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(502, 16, 42, 502)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(502, 16, 42, 502))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(502, 16, 42, 502))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(502, 16, 42, 502))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'collapse-bind', [->, 'Atom', 'Expression']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(502, 16, 42, 502))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
   Redo: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _102354)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _103292))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _103292)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 541)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _102354)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _102354)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_102354))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_102354))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_102354))
   Exit: (259) [system] nonvar(position(_102354))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(541, 17, 38, 541)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(541, 17, 38, 541))
   Call: (257) [user] current_read_mode(file, _122772)
   Unify: (257) [user] current_read_mode(file, _122772)
   Call: (258) [system] nb_current(file_mode, _122772)
   Redo: (257) [user] current_read_mode(file, _122772)
   Call: (258) [system] _122772=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _129222)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _129222)
^  Call: (258) [user] clause(t_l:s_reader_info(_129222), _131168, _131090)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _129222)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _129222)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _129222)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _129222)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _129222)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _129222)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _129222)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _129222)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _144998)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (260) [system] char_type('\n', space)
   Exit: (260) [system] char_type('\n', space)
   Call: (260) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (260) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _129222)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _129222)
   Call: (261) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _129222)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _129222)
   Call: (261) [system] peek_char((0x55aefe44e2f0), _155204)
   Exit: (261) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (261) [system] char_type('(', space)
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _129222)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _129222)
^  Call: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (262) [system] string((0x55aefe44e2f0))
^  Redo: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _129222)
^  Unify: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _129222)
^  Call: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _129222)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _129222)
   Call: (263) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _129222)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _129222)
   Call: (263) [system] peek_char((0x55aefe44e2f0), _170958)
   Exit: (263) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (263) [system] char_type('(', space)
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _129222)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _129222)
   Call: (263) [system] _175600=(0x55aefe44e2f0)
   Exit: (263) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (263) [user] once((read_position((0x55aefe44e2f0), _177468, _177470, _177472, _177474), read_sexpr((0x55aefe44e2f0), _177486), assertz(metta_file_comment(_177468, _177470, _177472, _177486, _177474))))
^  Unify: (263) [system] once(user:(read_position((0x55aefe44e2f0), _177468, _177470, _177472, _177474), read_sexpr((0x55aefe44e2f0), _177486), assertz(metta_file_comment(_177468, _177470, _177472, _177486, _177474))))
^  Call: (265) [user] read_position((0x55aefe44e2f0), _177468, _177470, _177472, _177474)
^  Unify: (265) [user] read_position((0x55aefe44e2f0), _177468, _177470, _177472, _177474)
   Call: (266) [system] stream_property((0x55aefe44e2f0), position(_177474))
   Unify: (266) [system] stream_property((0x55aefe44e2f0), position(_177474))
   Call: (267) [system] nonvar((0x55aefe44e2f0))
   Exit: (267) [system] nonvar((0x55aefe44e2f0))
   Call: (267) [system] nonvar(position(_177474))
   Exit: (267) [system] nonvar(position(_177474))
   Exit: (266) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(542, 18, 0, 542)))
   Call: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(542, 18, 0, 542), _177468)
   Unify: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(542, 18, 0, 542), _177468)
   Call: (267) [system] nonvar(line_count)
   Exit: (267) [system] nonvar(line_count)
   Call: (267) [$syspreds] stream_position_field(line_count, _191456)
   Unify: (267) [$syspreds] stream_position_field(line_count, 2)
   Exit: (267) [$syspreds] stream_position_field(line_count, 2)
   Call: (267) [system] arg(2, '$stream_position'(542, 18, 0, 542), _177468)
   Exit: (267) [system] arg(2, '$stream_position'(542, 18, 0, 542), 18)
   Exit: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(542, 18, 0, 542), 18)
   Call: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(542, 18, 0, 542), _177470)
   Unify: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(542, 18, 0, 542), _177470)
   Call: (267) [system] nonvar(line_position)
   Exit: (267) [system] nonvar(line_position)
   Call: (267) [$syspreds] stream_position_field(line_position, _200750)
   Unify: (267) [$syspreds] stream_position_field(line_position, 3)
   Exit: (267) [$syspreds] stream_position_field(line_position, 3)
   Call: (267) [system] arg(3, '$stream_position'(542, 18, 0, 542), _177470)
   Exit: (267) [system] arg(3, '$stream_position'(542, 18, 0, 542), 0)
   Exit: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(542, 18, 0, 542), 0)
   Call: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(542, 18, 0, 542), _177472)
   Unify: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(542, 18, 0, 542), _177472)
   Call: (267) [system] nonvar(char_count)
   Exit: (267) [system] nonvar(char_count)
   Call: (267) [$syspreds] stream_position_field(char_count, _210044)
   Unify: (267) [$syspreds] stream_position_field(char_count, 1)
   Exit: (267) [$syspreds] stream_position_field(char_count, 1)
   Call: (267) [system] arg(1, '$stream_position'(542, 18, 0, 542), _177472)
   Exit: (267) [system] arg(1, '$stream_position'(542, 18, 0, 542), 542)
   Exit: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(542, 18, 0, 542), 542)
^  Exit: (265) [user] read_position((0x55aefe44e2f0), 18, 0, 542, '$stream_position'(542, 18, 0, 542))
^  Call: (265) [user] read_sexpr((0x55aefe44e2f0), _177486)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _177486)
   Call: (266) [system] string((0x55aefe44e2f0))
^  Redo: (265) [user] read_sexpr((0x55aefe44e2f0), _177486)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _177486)
^  Call: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _177486)
^  Unify: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _177486)
^  Call: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _224914)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (268) [system] '('=(;)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', 'white')
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', end_of_line)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', space)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', cntrl)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (267) [system] get_char((0x55aefe44e2f0), _241698)
   Exit: (267) [system] get_char((0x55aefe44e2f0), '(')
   Call: (267) [system] '('='('
   Exit: (267) [system] '('='('
^  Call: (267) [user] read_list(')', (0x55aefe44e2f0), _177486)
^  Unify: (267) [user] read_list(')', (0x55aefe44e2f0), _177486)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _249124)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, 'white')
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, end_of_line)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, space)
^  Redo: (269) [user] is_like_space(:)
^  Unify: (269) [user] is_like_space(:)
   Call: (270) [system] char_type(:, cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _265908)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), :)
   Call: (268) [system] (:)=')'
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _177486)
   Call: (268) [system] (:)=end_of_file
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _177486)
^  Call: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _271486)
^  Unify: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _271486)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _275200)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, 'white')
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, end_of_line)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, space)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, cntrl)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] get_char((0x55aefe44e2f0), _291984)
   Exit: (269) [system] get_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)='('
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _271486)
   Call: (269) [system] (:)='['
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _271486)
   Call: (269) [system] (:)='{'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _271486)
   Call: (269) [system] (:)='"'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _271486)
   Call: (269) [system] (:)=!
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _271486)
   Call: (269) [system] (:)='\''
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _271486)
   Call: (269) [system] (:)='`'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _271486)
   Call: (269) [system] (:)=end_of_file
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _271486)
^  Call: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _271486)
^  Unify: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, _271486)
^  Call: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _310594)
^  Unify: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _310594)
   Call: (271) [system] peek_char((0x55aefe44e2f0), _312460)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] is_delimiter(' ')
^  Unify: (271) [user] is_delimiter(' ')
   Call: (272) [system] char_type(' ', space)
   Exit: (272) [system] char_type(' ', space)
^  Exit: (271) [user] is_delimiter(' ')
   Call: (271) [system] _310594=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (270) [user] classify_and_convert_charseq(:, [], _271486)
^  Unify: (270) [user] classify_and_convert_charseq(:, [], _271486)
^  Call: (272) [system] setup_call_cleanup('$notrace'(_323626, _323628), once(user:catch(read_from_chars([:], _271486), _323602, fail)), '$restore_trace'(_323626, _323628))
^  Unify: (272) [system] setup_call_cleanup(system:'$notrace'(_323626, _323628), system:once(user:catch(read_from_chars([:], _271486), _323602, fail)), system:'$restore_trace'(_323626, _323628))
^  Call: (273) [system] sig_atomic(system:'$notrace'(_323626, _323628))
^  Exit: (272) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([:], :), _323602, fail)), system:'$restore_trace'(3, -1))
   Call: (271) [system] atomic(:)
   Exit: (271) [system] atomic(:)
^  Exit: (270) [user] classify_and_convert_charseq(:, [], :)
^  Exit: (269) [user] read_symbolic(')', (0x55aefe44e2f0), :, :)
^  Exit: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), :)
^  Call: (268) [user] read_list(')', (0x55aefe44e2f0), _332064)
^  Unify: (268) [user] read_list(')', (0x55aefe44e2f0), _332064)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _335778)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (270) [system] ' '=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(' ')
^  Unify: (270) [user] is_like_space(' ')
   Call: (271) [system] char_type(' ', 'white')
   Exit: (271) [system] char_type(' ', 'white')
^  Exit: (270) [user] is_like_space(' ')
   Call: (270) [system] get_char((0x55aefe44e2f0), _344436)
   Exit: (270) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _348064)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), s)
   Call: (271) [system] s=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(s)
^  Unify: (271) [user] is_like_space(s)
   Call: (272) [system] char_type(s, 'white')
^  Redo: (271) [user] is_like_space(s)
^  Unify: (271) [user] is_like_space(s)
   Call: (272) [system] char_type(s, end_of_line)
^  Redo: (271) [user] is_like_space(s)
^  Unify: (271) [user] is_like_space(s)
   Call: (272) [system] char_type(s, space)
^  Redo: (271) [user] is_like_space(s)
^  Unify: (271) [user] is_like_space(s)
   Call: (272) [system] char_type(s, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _365772)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), s)
   Call: (269) [system] s=')'
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _332064)
   Call: (269) [system] s=end_of_file
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _332064)
^  Call: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _371350)
^  Unify: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _371350)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _375064)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), s)
   Call: (271) [system] s=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(s)
^  Unify: (271) [user] is_like_space(s)
   Call: (272) [system] char_type(s, 'white')
^  Redo: (271) [user] is_like_space(s)
^  Unify: (271) [user] is_like_space(s)
   Call: (272) [system] char_type(s, end_of_line)
^  Redo: (271) [user] is_like_space(s)
^  Unify: (271) [user] is_like_space(s)
   Call: (272) [system] char_type(s, space)
^  Redo: (271) [user] is_like_space(s)
^  Unify: (271) [user] is_like_space(s)
   Call: (272) [system] char_type(s, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] get_char((0x55aefe44e2f0), _391848)
   Exit: (270) [system] get_char((0x55aefe44e2f0), s)
   Call: (270) [system] s='('
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _371350)
   Call: (270) [system] s='['
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _371350)
   Call: (270) [system] s='{'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _371350)
   Call: (270) [system] s='"'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _371350)
   Call: (270) [system] s=!
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _371350)
   Call: (270) [system] s='\''
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _371350)
   Call: (270) [system] s='`'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _371350)
   Call: (270) [system] s=end_of_file
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _371350)
^  Call: (270) [user] read_symbolic(')', (0x55aefe44e2f0), s, _371350)
^  Unify: (270) [user] read_symbolic(')', (0x55aefe44e2f0), s, _371350)
^  Call: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _410458)
^  Unify: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _410458)
   Call: (272) [system] peek_char((0x55aefe44e2f0), _412324)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), u)
^  Call: (272) [user] is_delimiter(u)
^  Unify: (272) [user] is_delimiter(u)
   Call: (273) [system] char_type(u, space)
^  Redo: (272) [user] is_delimiter(u)
   Call: (273) [system] arg(_417964, v('(', ')', end_of_file), u)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _410458)
   Call: (272) [system] ')'==u
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _410458)
   Call: (272) [system] get_char((0x55aefe44e2f0), u)
   Exit: (272) [system] get_char((0x55aefe44e2f0), u)
   Call: (272) [system] u=(\)
^  Redo: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _410458)
^  Call: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _425330)
^  Unify: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _425330)
   Call: (273) [system] peek_char((0x55aefe44e2f0), _427196)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (273) [user] is_delimiter(p)
^  Unify: (273) [user] is_delimiter(p)
   Call: (274) [system] char_type(p, space)
^  Redo: (273) [user] is_delimiter(p)
   Call: (274) [system] arg(_432836, v('(', ')', end_of_file), p)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _425330)
   Call: (273) [system] ')'==p
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _425330)
   Call: (273) [system] get_char((0x55aefe44e2f0), p)
   Exit: (273) [system] get_char((0x55aefe44e2f0), p)
   Call: (273) [system] p=(\)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _425330)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _440202)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _440202)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _442068)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (274) [user] is_delimiter(e)
^  Unify: (274) [user] is_delimiter(e)
   Call: (275) [system] char_type(e, space)
^  Redo: (274) [user] is_delimiter(e)
   Call: (275) [system] arg(_447708, v('(', ')', end_of_file), e)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _440202)
   Call: (274) [system] ')'==e
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _440202)
   Call: (274) [system] get_char((0x55aefe44e2f0), e)
   Exit: (274) [system] get_char((0x55aefe44e2f0), e)
   Call: (274) [system] e=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _440202)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _455074)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _455074)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _456940)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (275) [user] is_delimiter(r)
^  Unify: (275) [user] is_delimiter(r)
   Call: (276) [system] char_type(r, space)
^  Redo: (275) [user] is_delimiter(r)
   Call: (276) [system] arg(_462580, v('(', ')', end_of_file), r)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _455074)
   Call: (275) [system] ')'==r
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _455074)
   Call: (275) [system] get_char((0x55aefe44e2f0), r)
   Exit: (275) [system] get_char((0x55aefe44e2f0), r)
   Call: (275) [system] r=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _455074)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _469946)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _469946)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _471812)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (276) [user] is_delimiter(p)
^  Unify: (276) [user] is_delimiter(p)
   Call: (277) [system] char_type(p, space)
^  Redo: (276) [user] is_delimiter(p)
   Call: (277) [system] arg(_477452, v('(', ')', end_of_file), p)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _469946)
   Call: (276) [system] ')'==p
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _469946)
   Call: (276) [system] get_char((0x55aefe44e2f0), p)
   Exit: (276) [system] get_char((0x55aefe44e2f0), p)
   Call: (276) [system] p=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _469946)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _484818)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _484818)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _486684)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (277) [user] is_delimiter(o)
^  Unify: (277) [user] is_delimiter(o)
   Call: (278) [system] char_type(o, space)
^  Redo: (277) [user] is_delimiter(o)
   Call: (278) [system] arg(_492324, v('(', ')', end_of_file), o)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _484818)
   Call: (277) [system] ')'==o
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _484818)
   Call: (277) [system] get_char((0x55aefe44e2f0), o)
   Exit: (277) [system] get_char((0x55aefe44e2f0), o)
   Call: (277) [system] o=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _484818)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _499690)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _499690)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _501556)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (278) [user] is_delimiter(s)
^  Unify: (278) [user] is_delimiter(s)
   Call: (279) [system] char_type(s, space)
^  Redo: (278) [user] is_delimiter(s)
   Call: (279) [system] arg(_507196, v('(', ')', end_of_file), s)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _499690)
   Call: (278) [system] ')'==s
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _499690)
   Call: (278) [system] get_char((0x55aefe44e2f0), s)
   Exit: (278) [system] get_char((0x55aefe44e2f0), s)
   Call: (278) [system] s=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _499690)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _514562)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _514562)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _516428)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (279) [user] is_delimiter(e)
^  Unify: (279) [user] is_delimiter(e)
   Call: (280) [system] char_type(e, space)
^  Redo: (279) [user] is_delimiter(e)
   Call: (280) [system] arg(_522068, v('(', ')', end_of_file), e)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _514562)
   Call: (279) [system] ')'==e
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6018)
   Call: (279) [system] get_char((0x55aefe44e2f0), e)
   Exit: (279) [system] get_char((0x55aefe44e2f0), e)
   Call: (279) [system] e=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6018)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _11450)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _11450)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _13316)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), -)
^  Call: (280) [user] is_delimiter(-)
^  Unify: (280) [user] is_delimiter(-)
   Call: (281) [system] char_type(-, space)
^  Redo: (280) [user] is_delimiter(-)
   Call: (281) [system] arg(_18956, v('(', ')', end_of_file), -)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _11450)
   Call: (280) [system] ')'==(-)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _11450)
   Call: (280) [system] get_char((0x55aefe44e2f0), -)
   Exit: (280) [system] get_char((0x55aefe44e2f0), -)
   Call: (280) [system] (-)=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _11450)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _26322)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _26322)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _28188)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), b)
^  Call: (281) [user] is_delimiter(b)
^  Unify: (281) [user] is_delimiter(b)
   Call: (282) [system] char_type(b, space)
^  Redo: (281) [user] is_delimiter(b)
   Call: (282) [system] arg(_33828, v('(', ')', end_of_file), b)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _26322)
   Call: (281) [system] ')'==b
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _26322)
   Call: (281) [system] get_char((0x55aefe44e2f0), b)
   Exit: (281) [system] get_char((0x55aefe44e2f0), b)
   Call: (281) [system] b=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _26322)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _41194)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _41194)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _43060)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (282) [user] is_delimiter(i)
^  Unify: (282) [user] is_delimiter(i)
   Call: (283) [system] char_type(i, space)
^  Redo: (282) [user] is_delimiter(i)
   Call: (283) [system] arg(_48700, v('(', ')', end_of_file), i)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _41194)
   Call: (282) [system] ')'==i
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _41194)
   Call: (282) [system] get_char((0x55aefe44e2f0), i)
   Exit: (282) [system] get_char((0x55aefe44e2f0), i)
   Call: (282) [system] i=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _41194)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _56066)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _56066)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _57932)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (283) [user] is_delimiter(n)
^  Unify: (283) [user] is_delimiter(n)
   Call: (284) [system] char_type(n, space)
^  Redo: (283) [user] is_delimiter(n)
   Call: (284) [system] arg(_63572, v('(', ')', end_of_file), n)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _56066)
   Call: (283) [system] ')'==n
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _56066)
   Call: (283) [system] get_char((0x55aefe44e2f0), n)
   Exit: (283) [system] get_char((0x55aefe44e2f0), n)
   Call: (283) [system] n=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _56066)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _70938)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _70938)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _72804)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), d)
^  Call: (284) [user] is_delimiter(d)
^  Unify: (284) [user] is_delimiter(d)
   Call: (285) [system] char_type(d, space)
^  Redo: (284) [user] is_delimiter(d)
   Call: (285) [system] arg(_78444, v('(', ')', end_of_file), d)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _70938)
   Call: (284) [system] ')'==d
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _70938)
   Call: (284) [system] get_char((0x55aefe44e2f0), d)
   Exit: (284) [system] get_char((0x55aefe44e2f0), d)
   Call: (284) [system] d=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _70938)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _85810)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _85810)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _87676)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (285) [user] is_delimiter(' ')
^  Unify: (285) [user] is_delimiter(' ')
   Call: (286) [system] char_type(' ', space)
   Exit: (286) [system] char_type(' ', space)
^  Exit: (285) [user] is_delimiter(' ')
   Call: (285) [system] _85810=[]
   Exit: (285) [system] []=[]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (284) [system] _70938=[d]
   Exit: (284) [system] [d]=[d]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [d])
   Call: (283) [system] _56066=[n, d]
   Exit: (283) [system] [n, d]=[n, d]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n, d])
   Call: (282) [system] _41194=[i, n, d]
   Exit: (282) [system] [i, n, d]=[i, n, d]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, n, d])
   Call: (281) [system] _26322=[b, i, n, d]
   Exit: (281) [system] [b, i, n, d]=[b, i, n, d]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [b, i, n, d])
   Call: (280) [system] _11450=[-, b, i, n, d]
   Exit: (280) [system] [-, b, i, n, d]=[-, b, i, n, d]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [-, b, i, n, d])
   Call: (279) [system] _6018=[e, -, b, i, n, d]
   Exit: (279) [system] [e, -, b, i, n, d]=[e, -, b, i, n, d]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, -, b, i, n, d])
   Call: (278) [system] _6014=[s, e, -, b, i, n, d]
   Exit: (278) [system] [s, e, -, b, i, n, d]=[s, e, -, b, i, n, d]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, e, -, b, i, n, d])
   Call: (277) [system] _6010=[o, s, e, -, b, i, n, d]
   Exit: (277) [system] [o, s, e, -, b, i, n, d]=[o, s, e, -, b, i, n, d]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, s, e, -, b, i, n, d])
   Call: (276) [system] _6006=[p, o, s, e, -, b, i, n, d]
   Exit: (276) [system] [p, o, s, e, -, b, i, n, d]=[p, o, s, e, -, b, i, n, d]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, o, s, e, -, b, i, n, d])
   Call: (275) [system] _6002=[r, p, o, s, e, -, b, i, n, d]
   Exit: (275) [system] [r, p, o, s, e, -, b, i, n, d]=[r, p, o, s, e, -, b, i, n, d]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, p, o, s, e, -, b, i, n, d])
   Call: (274) [system] _5998=[e, r, p, o, s, e, -, b, i, n, d]
   Exit: (274) [system] [e, r, p, o, s, e, -, b, i, n, d]=[e, r, p, o, s, e, -, b, i, n, d]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, r, p, o, s, e, -, b, i, n, d])
   Call: (273) [system] _5994=[p, e, r, p, o, s, e, -, b, i, n, d]
   Exit: (273) [system] [p, e, r, p, o, s, e, -, b, i, n, d]=[p, e, r, p, o, s, e, -, b, i, n, d]
^  Exit: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, e, r, p, o, s, e, -, b, i, n, d])
   Call: (272) [system] _5990=[u, p, e, r, p, o, s, e, -, b, i, n, d]
   Exit: (272) [system] [u, p, e, r, p, o, s, e, -, b, i, n, d]=[u, p, e, r, p, o, s, e, -, b, i, n, d]
^  Exit: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [u, p, e, r, p, o, s, e, -, b, i, n, d])
^  Call: (271) [user] classify_and_convert_charseq(s, [u, p, e, r, p, o, s, e, -, b, i, n, d], _5986)
^  Unify: (271) [user] classify_and_convert_charseq(s, [u, p, e, r, p, o, s, e, -, b, i, n, d], _5986)
^  Call: (273) [system] setup_call_cleanup('$notrace'(_135164, _135166), once(user:catch(read_from_chars([s, u, p, e, r, p, o, s, e, -, b, i, n, d], _5986), _135140, fail)), '$restore_trace'(_135164, _135166))
^  Unify: (273) [system] setup_call_cleanup(system:'$notrace'(_135164, _135166), system:once(user:catch(read_from_chars([s, u, p, e, r, p, o, s, e, -, b, i, n, d], _5986), _135140, fail)), system:'$restore_trace'(_135164, _135166))
^  Call: (274) [system] sig_atomic(system:'$notrace'(_135164, _135166))
^  Exit: (273) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([s, u, p, e, r, p, o, s, e, -, b, i, n, d], superpose-bind), _135140, fail)), system:'$restore_trace'(3, -1))
   Call: (272) [system] atomic(superpose-bind)
^  Redo: (271) [user] classify_and_convert_charseq(s, [u, p, e, r, p, o, s, e, -, b, i, n, d], _5986)
^  Unify: (271) [user] classify_and_convert_charseq(s, [u, p, e, r, p, o, s, e, -, b, i, n, d], _5986)
   Call: (272) [system] atom_chars(_5986, [s, u, p, e, r, p, o, s, e, -, b, i, n, d])
   Exit: (272) [system] atom_chars('superpose-bind', [s, u, p, e, r, p, o, s, e, -, b, i, n, d])
^  Exit: (271) [user] classify_and_convert_charseq(s, [u, p, e, r, p, o, s, e, -, b, i, n, d], 'superpose-bind')
^  Exit: (270) [user] read_symbolic(')', (0x55aefe44e2f0), s, 'superpose-bind')
^  Exit: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), 'superpose-bind')
^  Call: (269) [user] read_list(')', (0x55aefe44e2f0), _146410)
^  Unify: (269) [user] read_list(')', (0x55aefe44e2f0), _146410)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _150124)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (271) [system] ' '=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(' ')
^  Unify: (271) [user] is_like_space(' ')
   Call: (272) [system] char_type(' ', 'white')
   Exit: (272) [system] char_type(' ', 'white')
^  Exit: (271) [user] is_like_space(' ')
   Call: (271) [system] get_char((0x55aefe44e2f0), _158782)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _162410)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _180118)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (270) [system] '('=')'
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _146410)
   Call: (270) [system] '('=end_of_file
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _146410)
^  Call: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _185696)
^  Unify: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _185696)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _189410)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] get_char((0x55aefe44e2f0), _206194)
   Exit: (271) [system] get_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('='('
   Exit: (271) [system] '('='('
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _185696)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _185696)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _213620)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, 'white')
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, end_of_line)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, space)
^  Redo: (273) [user] is_like_space(-)
^  Unify: (273) [user] is_like_space(-)
   Call: (274) [system] char_type(-, cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _230404)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), -)
   Call: (272) [system] (-)=')'
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _185696)
   Call: (272) [system] (-)=end_of_file
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _185696)
^  Call: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _235982)
^  Unify: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _235982)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _239696)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, 'white')
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, end_of_line)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, space)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] get_char((0x55aefe44e2f0), _256480)
   Exit: (273) [system] get_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)='('
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _235982)
   Call: (273) [system] (-)='['
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _235982)
   Call: (273) [system] (-)='{'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _235982)
   Call: (273) [system] (-)='"'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _235982)
   Call: (273) [system] (-)=!
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _235982)
   Call: (273) [system] (-)='\''
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _235982)
   Call: (273) [system] (-)='`'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _235982)
   Call: (273) [system] (-)=end_of_file
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _235982)
^  Call: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _235982)
^  Unify: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, _235982)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275090)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275090)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _276956)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), >)
^  Call: (275) [user] is_delimiter(>)
^  Unify: (275) [user] is_delimiter(>)
   Call: (276) [system] char_type(>, space)
^  Redo: (275) [user] is_delimiter(>)
   Call: (276) [system] arg(_282596, v('(', ')', end_of_file), >)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275090)
   Call: (275) [system] ')'==(>)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275090)
   Call: (275) [system] get_char((0x55aefe44e2f0), >)
   Exit: (275) [system] get_char((0x55aefe44e2f0), >)
   Call: (275) [system] (>)=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275090)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _289962)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _289962)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _291828)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] is_delimiter(' ')
^  Unify: (276) [user] is_delimiter(' ')
   Call: (277) [system] char_type(' ', space)
   Exit: (277) [system] char_type(' ', space)
^  Exit: (276) [user] is_delimiter(' ')
   Call: (276) [system] _289962=[]
   Exit: (276) [system] []=[]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (275) [system] _275090=[>]
   Exit: (275) [system] [>]=[>]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [>])
^  Call: (274) [user] classify_and_convert_charseq(-, [>], _235982)
^  Unify: (274) [user] classify_and_convert_charseq(-, [>], _235982)
^  Call: (276) [system] setup_call_cleanup('$notrace'(_305788, _305790), once(user:catch(read_from_chars([-, >], _235982), _305764, fail)), '$restore_trace'(_305788, _305790))
^  Unify: (276) [system] setup_call_cleanup(system:'$notrace'(_305788, _305790), system:once(user:catch(read_from_chars([-, >], _235982), _305764, fail)), system:'$restore_trace'(_305788, _305790))
^  Call: (277) [system] sig_atomic(system:'$notrace'(_305788, _305790))
^  Exit: (276) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([-, >], ->), _305764, fail)), system:'$restore_trace'(3, -1))
   Call: (275) [system] atomic(->)
   Exit: (275) [system] atomic(->)
^  Exit: (274) [user] classify_and_convert_charseq(-, [>], ->)
^  Exit: (273) [user] read_symbolic(')', (0x55aefe44e2f0), -, ->)
^  Exit: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), ->)
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _314226)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _314226)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _317940)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (274) [system] ' '=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(' ')
^  Unify: (274) [user] is_like_space(' ')
   Call: (275) [system] char_type(' ', 'white')
   Exit: (275) [system] char_type(' ', 'white')
^  Exit: (274) [user] is_like_space(' ')
   Call: (274) [system] get_char((0x55aefe44e2f0), _326598)
   Exit: (274) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _330226)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (275) [system] 'E'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('E')
^  Unify: (275) [user] is_like_space('E')
   Call: (276) [system] char_type('E', 'white')
^  Redo: (275) [user] is_like_space('E')
^  Unify: (275) [user] is_like_space('E')
   Call: (276) [system] char_type('E', end_of_line)
^  Redo: (275) [user] is_like_space('E')
^  Unify: (275) [user] is_like_space('E')
   Call: (276) [system] char_type('E', space)
^  Redo: (275) [user] is_like_space('E')
^  Unify: (275) [user] is_like_space('E')
   Call: (276) [system] char_type('E', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _347934)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (273) [system] 'E'=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _314226)
   Call: (273) [system] 'E'=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _314226)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _353512)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _353512)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _357226)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (275) [system] 'E'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('E')
^  Unify: (275) [user] is_like_space('E')
   Call: (276) [system] char_type('E', 'white')
^  Redo: (275) [user] is_like_space('E')
^  Unify: (275) [user] is_like_space('E')
   Call: (276) [system] char_type('E', end_of_line)
^  Redo: (275) [user] is_like_space('E')
^  Unify: (275) [user] is_like_space('E')
   Call: (276) [system] char_type('E', space)
^  Redo: (275) [user] is_like_space('E')
^  Unify: (275) [user] is_like_space('E')
   Call: (276) [system] char_type('E', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _374010)
   Exit: (274) [system] get_char((0x55aefe44e2f0), 'E')
   Call: (274) [system] 'E'='('
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _353512)
   Call: (274) [system] 'E'='['
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _353512)
   Call: (274) [system] 'E'='{'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _353512)
   Call: (274) [system] 'E'='"'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _353512)
   Call: (274) [system] 'E'=!
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _353512)
   Call: (274) [system] 'E'='\''
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _353512)
   Call: (274) [system] 'E'='`'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _353512)
   Call: (274) [system] 'E'=end_of_file
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _353512)
^  Call: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', _353512)
^  Unify: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', _353512)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _392620)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _392620)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _394486)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), x)
^  Call: (276) [user] is_delimiter(x)
^  Unify: (276) [user] is_delimiter(x)
   Call: (277) [system] char_type(x, space)
^  Redo: (276) [user] is_delimiter(x)
   Call: (277) [system] arg(_400126, v('(', ')', end_of_file), x)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _392620)
   Call: (276) [system] ')'==x
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _392620)
   Call: (276) [system] get_char((0x55aefe44e2f0), x)
   Exit: (276) [system] get_char((0x55aefe44e2f0), x)
   Call: (276) [system] x=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _392620)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _407492)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _407492)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _409358)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (277) [user] is_delimiter(p)
^  Unify: (277) [user] is_delimiter(p)
   Call: (278) [system] char_type(p, space)
^  Redo: (277) [user] is_delimiter(p)
   Call: (278) [system] arg(_414998, v('(', ')', end_of_file), p)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _407492)
   Call: (277) [system] ')'==p
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _407492)
   Call: (277) [system] get_char((0x55aefe44e2f0), p)
   Exit: (277) [system] get_char((0x55aefe44e2f0), p)
   Call: (277) [system] p=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _407492)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _422364)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _422364)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _424230)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (278) [user] is_delimiter(r)
^  Unify: (278) [user] is_delimiter(r)
   Call: (279) [system] char_type(r, space)
^  Redo: (278) [user] is_delimiter(r)
   Call: (279) [system] arg(_429870, v('(', ')', end_of_file), r)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _422364)
   Call: (278) [system] ')'==r
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _422364)
   Call: (278) [system] get_char((0x55aefe44e2f0), r)
   Exit: (278) [system] get_char((0x55aefe44e2f0), r)
   Call: (278) [system] r=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _422364)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _437236)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _437236)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _439102)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (279) [user] is_delimiter(e)
^  Unify: (279) [user] is_delimiter(e)
   Call: (280) [system] char_type(e, space)
^  Redo: (279) [user] is_delimiter(e)
   Call: (280) [system] arg(_444742, v('(', ')', end_of_file), e)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _437236)
   Call: (279) [system] ')'==e
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _437236)
   Call: (279) [system] get_char((0x55aefe44e2f0), e)
   Exit: (279) [system] get_char((0x55aefe44e2f0), e)
   Call: (279) [system] e=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _437236)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _452108)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _452108)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _453974)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (280) [user] is_delimiter(s)
^  Unify: (280) [user] is_delimiter(s)
   Call: (281) [system] char_type(s, space)
^  Redo: (280) [user] is_delimiter(s)
   Call: (281) [system] arg(_459614, v('(', ')', end_of_file), s)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _452108)
   Call: (280) [system] ')'==s
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _452108)
   Call: (280) [system] get_char((0x55aefe44e2f0), s)
   Exit: (280) [system] get_char((0x55aefe44e2f0), s)
   Call: (280) [system] s=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _452108)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _466980)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _466980)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _468846)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (281) [user] is_delimiter(s)
^  Unify: (281) [user] is_delimiter(s)
   Call: (282) [system] char_type(s, space)
^  Redo: (281) [user] is_delimiter(s)
   Call: (282) [system] arg(_474486, v('(', ')', end_of_file), s)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _466980)
   Call: (281) [system] ')'==s
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _466980)
   Call: (281) [system] get_char((0x55aefe44e2f0), s)
   Exit: (281) [system] get_char((0x55aefe44e2f0), s)
   Call: (281) [system] s=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _466980)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _481852)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _481852)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _483718)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (282) [user] is_delimiter(i)
^  Unify: (282) [user] is_delimiter(i)
   Call: (283) [system] char_type(i, space)
^  Redo: (282) [user] is_delimiter(i)
   Call: (283) [system] arg(_489358, v('(', ')', end_of_file), i)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _481852)
   Call: (282) [system] ')'==i
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _481852)
   Call: (282) [system] get_char((0x55aefe44e2f0), i)
   Exit: (282) [system] get_char((0x55aefe44e2f0), i)
   Call: (282) [system] i=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _481852)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _496724)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _496724)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _498590)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (283) [user] is_delimiter(o)
^  Unify: (283) [user] is_delimiter(o)
   Call: (284) [system] char_type(o, space)
^  Redo: (283) [user] is_delimiter(o)
   Call: (284) [system] arg(_504230, v('(', ')', end_of_file), o)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _496724)
   Call: (283) [system] ')'==o
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _496724)
   Call: (283) [system] get_char((0x55aefe44e2f0), o)
   Exit: (283) [system] get_char((0x55aefe44e2f0), o)
   Call: (283) [system] o=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _496724)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _511596)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _511596)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _513462)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (284) [user] is_delimiter(n)
^  Unify: (284) [user] is_delimiter(n)
   Call: (285) [system] char_type(n, space)
^  Redo: (284) [user] is_delimiter(n)
   Call: (285) [system] arg(_519102, v('(', ')', end_of_file), n)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _511596)
   Call: (284) [system] ')'==n
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _511596)
   Call: (284) [system] get_char((0x55aefe44e2f0), n)
   Exit: (284) [system] get_char((0x55aefe44e2f0), n)
   Call: (284) [system] n=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6040)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _8576)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _8576)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _10442)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (285) [user] is_delimiter(' ')
^  Unify: (285) [user] is_delimiter(' ')
   Call: (286) [system] char_type(' ', space)
   Exit: (286) [system] char_type(' ', space)
^  Exit: (285) [user] is_delimiter(' ')
   Call: (285) [system] _8576=[]
   Exit: (285) [system] []=[]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (284) [system] _6040=[n]
   Exit: (284) [system] [n]=[n]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (283) [system] _6036=[o, n]
   Exit: (283) [system] [o, n]=[o, n]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, n])
   Call: (282) [system] _6032=[i, o, n]
   Exit: (282) [system] [i, o, n]=[i, o, n]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, o, n])
   Call: (281) [system] _6028=[s, i, o, n]
   Exit: (281) [system] [s, i, o, n]=[s, i, o, n]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, i, o, n])
   Call: (280) [system] _6024=[s, s, i, o, n]
   Exit: (280) [system] [s, s, i, o, n]=[s, s, i, o, n]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, s, i, o, n])
   Call: (279) [system] _6020=[e, s, s, i, o, n]
   Exit: (279) [system] [e, s, s, i, o, n]=[e, s, s, i, o, n]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, s, s, i, o, n])
   Call: (278) [system] _6016=[r, e, s, s, i, o, n]
   Exit: (278) [system] [r, e, s, s, i, o, n]=[r, e, s, s, i, o, n]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, e, s, s, i, o, n])
   Call: (277) [system] _6012=[p, r, e, s, s, i, o, n]
   Exit: (277) [system] [p, r, e, s, s, i, o, n]=[p, r, e, s, s, i, o, n]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, r, e, s, s, i, o, n])
   Call: (276) [system] _6008=[x, p, r, e, s, s, i, o, n]
   Exit: (276) [system] [x, p, r, e, s, s, i, o, n]=[x, p, r, e, s, s, i, o, n]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [x, p, r, e, s, s, i, o, n])
^  Call: (275) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _6004)
^  Unify: (275) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _6004)
^  Call: (277) [system] setup_call_cleanup('$notrace'(_46754, _46756), once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _6004), _46730, fail)), '$restore_trace'(_46754, _46756))
^  Unify: (277) [system] setup_call_cleanup(system:'$notrace'(_46754, _46756), system:once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _6004), _46730, fail)), system:'$restore_trace'(_46754, _46756))
^  Call: (278) [system] sig_atomic(system:'$notrace'(_46754, _46756))
^  Exit: (277) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _6004), _46730, fail)), system:'$restore_trace'(3, -1))
   Call: (276) [system] atomic(_6004)
^  Redo: (275) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _6004)
^  Unify: (275) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _6004)
   Call: (276) [system] atom_chars(_6004, ['E', x, p, r, e, s, s, i, o, n])
   Exit: (276) [system] atom_chars('Expression', ['E', x, p, r, e, s, s, i, o, n])
^  Exit: (275) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], 'Expression')
^  Exit: (274) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', 'Expression')
^  Exit: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Expression')
^  Call: (273) [user] read_list(')', (0x55aefe44e2f0), _58008)
^  Unify: (273) [user] read_list(')', (0x55aefe44e2f0), _58008)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _61722)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (275) [system] ' '=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(' ')
^  Unify: (275) [user] is_like_space(' ')
   Call: (276) [system] char_type(' ', 'white')
   Exit: (276) [system] char_type(' ', 'white')
^  Exit: (275) [user] is_like_space(' ')
   Call: (275) [system] get_char((0x55aefe44e2f0), _70380)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _74008)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _91716)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (274) [system] 'A'=')'
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _58008)
   Call: (274) [system] 'A'=end_of_file
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _58008)
^  Call: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _97294)
^  Unify: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _97294)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _101008)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] get_char((0x55aefe44e2f0), _117792)
   Exit: (275) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'='('
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _97294)
   Call: (275) [system] 'A'='['
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _97294)
   Call: (275) [system] 'A'='{'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _97294)
   Call: (275) [system] 'A'='"'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _97294)
   Call: (275) [system] 'A'=!
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _97294)
   Call: (275) [system] 'A'='\''
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _97294)
   Call: (275) [system] 'A'='`'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _97294)
   Call: (275) [system] 'A'=end_of_file
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _97294)
^  Call: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _97294)
^  Unify: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _97294)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _136402)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _136402)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _138268)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (277) [user] is_delimiter(t)
^  Unify: (277) [user] is_delimiter(t)
   Call: (278) [system] char_type(t, space)
^  Redo: (277) [user] is_delimiter(t)
   Call: (278) [system] arg(_143908, v('(', ')', end_of_file), t)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _136402)
   Call: (277) [system] ')'==t
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _136402)
   Call: (277) [system] get_char((0x55aefe44e2f0), t)
   Exit: (277) [system] get_char((0x55aefe44e2f0), t)
   Call: (277) [system] t=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _136402)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _151274)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _151274)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _153140)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (278) [user] is_delimiter(o)
^  Unify: (278) [user] is_delimiter(o)
   Call: (279) [system] char_type(o, space)
^  Redo: (278) [user] is_delimiter(o)
   Call: (279) [system] arg(_158780, v('(', ')', end_of_file), o)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _151274)
   Call: (278) [system] ')'==o
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _151274)
   Call: (278) [system] get_char((0x55aefe44e2f0), o)
   Exit: (278) [system] get_char((0x55aefe44e2f0), o)
   Call: (278) [system] o=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _151274)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _166146)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _166146)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _168012)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (279) [user] is_delimiter(m)
^  Unify: (279) [user] is_delimiter(m)
   Call: (280) [system] char_type(m, space)
^  Redo: (279) [user] is_delimiter(m)
   Call: (280) [system] arg(_173652, v('(', ')', end_of_file), m)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _166146)
   Call: (279) [system] ')'==m
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _166146)
   Call: (279) [system] get_char((0x55aefe44e2f0), m)
   Exit: (279) [system] get_char((0x55aefe44e2f0), m)
   Call: (279) [system] m=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _166146)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _181018)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _181018)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _182884)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (280) [user] is_delimiter(')')
^  Unify: (280) [user] is_delimiter(')')
   Call: (281) [system] char_type(')', space)
^  Redo: (280) [user] is_delimiter(')')
   Call: (281) [system] arg(_188524, v('(', ')', end_of_file), ')')
   Exit: (281) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (280) [user] is_delimiter(')')
   Call: (280) [system] _181018=[]
   Exit: (280) [system] []=[]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (279) [system] _166146=[m]
   Exit: (279) [system] [m]=[m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (278) [system] _151274=[o, m]
   Exit: (278) [system] [o, m]=[o, m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (277) [system] _136402=[t, o, m]
   Exit: (277) [system] [t, o, m]=[t, o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (276) [user] classify_and_convert_charseq('A', [t, o, m], _97294)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _97294)
^  Call: (278) [system] setup_call_cleanup('$notrace'(_204300, _204302), once(user:catch(read_from_chars(['A', t, o, m], _97294), _204276, fail)), '$restore_trace'(_204300, _204302))
^  Unify: (278) [system] setup_call_cleanup(system:'$notrace'(_204300, _204302), system:once(user:catch(read_from_chars(['A', t, o, m], _97294), _204276, fail)), system:'$restore_trace'(_204300, _204302))
^  Call: (279) [system] sig_atomic(system:'$notrace'(_204300, _204302))
^  Exit: (278) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _97294), _204276, fail)), system:'$restore_trace'(3, -1))
   Call: (277) [system] atomic(_97294)
^  Redo: (276) [user] classify_and_convert_charseq('A', [t, o, m], _97294)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _97294)
   Call: (277) [system] atom_chars(_97294, ['A', t, o, m])
   Exit: (277) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (276) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _215554)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _215554)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _219268)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (276) [system] ')'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', 'white')
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', end_of_line)
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', space)
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _236052)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (275) [system] ')'=')'
   Exit: (275) [system] ')'=')'
   Call: (275) [system] get_char((0x55aefe44e2f0), _239842)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ')')
   Call: (275) [system] _215554=[]
   Exit: (275) [system] []=[]
^  Exit: (274) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (274) [system] _58008=['Atom']
   Exit: (274) [system] ['Atom']=['Atom']
^  Exit: (273) [user] read_list(')', (0x55aefe44e2f0), ['Atom'])
   Call: (273) [system] _6000=['Expression', 'Atom']
   Exit: (273) [system] ['Expression', 'Atom']=['Expression', 'Atom']
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), ['Expression', 'Atom'])
   Call: (272) [system] _5992=[->, 'Expression', 'Atom']
   Exit: (272) [system] [->, 'Expression', 'Atom']=[->, 'Expression', 'Atom']
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [->, 'Expression', 'Atom'])
^  Exit: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), [->, 'Expression', 'Atom'])
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _253724)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _253724)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _257438)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (272) [system] ')'=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', 'white')
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', end_of_line)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', space)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _274222)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (271) [system] ')'=')'
   Exit: (271) [system] ')'=')'
   Call: (271) [system] get_char((0x55aefe44e2f0), _278012)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ')')
   Call: (271) [system] _253724=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (270) [system] _5988=[[->, 'Expression', 'Atom']]
   Exit: (270) [system] [[->, 'Expression', 'Atom']]=[[->, 'Expression', 'Atom']]
^  Exit: (269) [user] read_list(')', (0x55aefe44e2f0), [[->, 'Expression', 'Atom']])
   Call: (269) [system] _5982=['superpose-bind', [->, 'Expression', 'Atom']]
   Exit: (269) [system] ['superpose-bind', [->, 'Expression', 'Atom']]=['superpose-bind', [->, 'Expression', 'Atom']]
^  Exit: (268) [user] read_list(')', (0x55aefe44e2f0), ['superpose-bind', [->, 'Expression', 'Atom']])
   Call: (268) [system] _5942=[:, 'superpose-bind', [->, 'Expression', 'Atom']]
   Exit: (268) [system] [:, 'superpose-bind', [->, 'Expression', 'Atom']]=[:, 'superpose-bind', [->, 'Expression', 'Atom']]
^  Exit: (267) [user] read_list(')', (0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Exit: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Exit: (265) [user] read_sexpr((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Call: (265) [user] assertz(metta_file_comment(18, 0, 542, [:, 'superpose-bind', [->, 'Expression', 'Atom']], '$stream_position'(542, 18, 0, 542)))
^  Exit: (265) [user] assertz(metta_file_comment(18, 0, 542, [:, 'superpose-bind', [->, 'Expression', 'Atom']], '$stream_position'(542, 18, 0, 542)))
^  Exit: (263) [system] once(user:(read_position((0x55aefe44e2f0), 18, 0, 542, '$stream_position'(542, 18, 0, 542)), read_sexpr((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Expression', 'Atom']]), assertz(metta_file_comment(18, 0, 542, [:, 'superpose-bind', [->, 'Expression', 'Atom']], '$stream_position'(542, 18, 0, 542)))))
   Call: (263) [system] fail
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Call: (263) [user] retract(metta_file_comment(_298386, _298388, _298390, _298392, _298394))
^  Exit: (263) [user] retract(metta_file_comment(18, 0, 542, [:, 'superpose-bind', [->, 'Expression', 'Atom']], '$stream_position'(542, 18, 0, 542)))
^  Call: (263) [user] trly(untyped_to_metta, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _5908)
^  Call: (264) [user] once(call(untyped_to_metta, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _302172))
^  Unify: (264) [system] once(user:call(untyped_to_metta, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _302172))
^  Call: (265) [user] call(untyped_to_metta, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _302172)
^  Unify: (265) [system] call(user:untyped_to_metta, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _302172)
^  Call: (266) [user] untyped_to_metta([:, 'superpose-bind', [->, 'Expression', 'Atom']], _302172)
^  Unify: (266) [user] untyped_to_metta([:, 'superpose-bind', [->, 'Expression', 'Atom']], _302172)
^  Call: (267) [user] must_det_ll(trly(mfix_vars1, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _307784))
^  Unify: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _307784))
^  Call: (268) [user] once(user:trly(mfix_vars1, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _307784))
^  Unify: (268) [system] once(user:trly(mfix_vars1, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _307784))
^  Call: (269) [user] trly(mfix_vars1, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _307784)
^  Unify: (269) [user] trly(mfix_vars1, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _307784)
^  Call: (270) [user] once(call(mfix_vars1, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370))
^  Unify: (270) [system] once(user:call(mfix_vars1, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370))
^  Call: (271) [user] call(mfix_vars1, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370)
^  Unify: (271) [system] call(user:mfix_vars1, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370)
^  Call: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370)
^  Unify: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370)
   Call: (273) [system] var([:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Redo: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370)
^  Unify: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Expression', 'Atom']], '$VAR'(_320830))
   Call: (273) [system] atom([:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Redo: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370)
^  Unify: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370)
   Call: (273) [system] [:, 'superpose-bind', [->, 'Expression', 'Atom']]==true
^  Redo: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370)
^  Unify: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370)
   Call: (273) [system] [:, 'superpose-bind', [->, 'Expression', 'Atom']]==false
^  Redo: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370)
^  Unify: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370)
   Call: (273) [system] (:)=='['
^  Redo: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370)
^  Unify: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370)
   Call: (273) [system] (:)=='{'
^  Redo: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370)
^  Unify: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370)
   Call: (273) [system] is_list(['superpose-bind', [->, 'Expression', 'Atom']])
   Exit: (273) [system] is_list(['superpose-bind', [->, 'Expression', 'Atom']])
   Call: (273) [lists] lists:last(['superpose-bind', [->, 'Expression', 'Atom']], _337524)
   Unify: (273) [lists] lists:last(['superpose-bind', [->, 'Expression', 'Atom']], _337524)
   Call: (274) [lists] lists:last_([[->, 'Expression', 'Atom']], 'superpose-bind', _337524)
   Unify: (274) [lists] lists:last_([[->, 'Expression', 'Atom']], 'superpose-bind', _337524)
   Call: (275) [lists] lists:last_([], [->, 'Expression', 'Atom'], _337524)
   Unify: (275) [lists] lists:last_([], [->, 'Expression', 'Atom'], [->, 'Expression', 'Atom'])
   Exit: (275) [lists] lists:last_([], [->, 'Expression', 'Atom'], [->, 'Expression', 'Atom'])
   Exit: (274) [lists] lists:last_([[->, 'Expression', 'Atom']], 'superpose-bind', [->, 'Expression', 'Atom'])
   Exit: (273) [lists] lists:last(['superpose-bind', [->, 'Expression', 'Atom']], [->, 'Expression', 'Atom'])
   Call: (273) [system] [->, 'Expression', 'Atom']=='}'
^  Redo: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370)
^  Unify: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370)
   Call: (273) [system] [:, 'superpose-bind', [->, 'Expression', 'Atom']]==[_348688, _348694]
^  Redo: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370)
^  Unify: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370)
   Call: (273) [system] fail
^  Redo: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370)
^  Unify: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370)
   Call: (273) [system] is_list([:, 'superpose-bind', [->, 'Expression', 'Atom']])
   Exit: (273) [system] is_list([:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Call: (273) [user] apply:maplist(mfix_vars1, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370)
^  Unify: (273) [apply] apply:maplist(user:mfix_vars1, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370)
   Call: (274) [apply] apply:maplist_([:, 'superpose-bind', [->, 'Expression', 'Atom']], _313370, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([:, 'superpose-bind', [->, 'Expression', 'Atom']], [_358918|_358920], user:mfix_vars1)
^  Call: (275) [user] mfix_vars1(:, _358918)
^  Unify: (275) [user] mfix_vars1(:, _358918)
   Call: (276) [system] var(:)
^  Redo: (275) [user] mfix_vars1(:, _358918)
^  Unify: (275) [user] mfix_vars1(:, '$VAR'(_363564))
   Call: (276) [system] atom(:)
   Exit: (276) [system] atom(:)
^  Call: (276) [user] symbol_concat($, _366342, :)
^  Unify: (276) [user] symbol_concat($, _366342, :)
   Call: (277) [system] atom_concat($, _366342, :)
   Fail: (277) [system] atom_concat($, _366342, :)
^  Fail: (276) [user] symbol_concat($, _366342, :)
^  Redo: (275) [user] mfix_vars1(:, _358918)
^  Unify: (275) [user] mfix_vars1(:, _358918)
   Call: (276) [system] (:)==true
^  Redo: (275) [user] mfix_vars1(:, _358918)
^  Unify: (275) [user] mfix_vars1(:, _358918)
   Call: (276) [system] (:)==false
^  Redo: (275) [user] mfix_vars1(:, _358918)
^  Unify: (275) [user] mfix_vars1(:, _358918)
   Call: (276) [system] (:)==[_378430, _378436]
^  Redo: (275) [user] mfix_vars1(:, _358918)
^  Unify: (275) [user] mfix_vars1(:, _358918)
   Call: (276) [system] is_list(:)
^  Redo: (275) [user] mfix_vars1(:, _358918)
^  Unify: (275) [user] mfix_vars1(:, _358918)
   Call: (276) [system] string(:)
^  Redo: (275) [user] mfix_vars1(:, _358918)
^  Unify: (275) [user] mfix_vars1(:, _358918)
   Call: (276) [system] compound(:)
^  Redo: (275) [user] mfix_vars1(:, _358918)
^  Unify: (275) [user] mfix_vars1(:, _358918)
^  Call: (276) [user] symbol(:)
^  Unify: (276) [user] symbol(:)
   Call: (277) [system] atom(:)
   Exit: (277) [system] atom(:)
^  Exit: (276) [user] symbol(:)
^  Unify: (275) [user] mfix_vars1(:, :)
^  Exit: (275) [user] mfix_vars1(:, :)
   Call: (275) [apply] apply:maplist_(['superpose-bind', [->, 'Expression', 'Atom']], _358920, user:mfix_vars1)
   Unify: (275) [apply] apply:maplist_(['superpose-bind', [->, 'Expression', 'Atom']], [_396974|_396976], user:mfix_vars1)
^  Call: (276) [user] mfix_vars1('superpose-bind', _396974)
^  Unify: (276) [user] mfix_vars1('superpose-bind', _396974)
   Call: (277) [system] var('superpose-bind')
^  Redo: (276) [user] mfix_vars1('superpose-bind', _396974)
^  Unify: (276) [user] mfix_vars1('superpose-bind', '$VAR'(_401620))
   Call: (277) [system] atom('superpose-bind')
   Exit: (277) [system] atom('superpose-bind')
^  Call: (277) [user] symbol_concat($, _404398, 'superpose-bind')
^  Unify: (277) [user] symbol_concat($, _404398, 'superpose-bind')
   Call: (278) [system] atom_concat($, _404398, 'superpose-bind')
   Fail: (278) [system] atom_concat($, _404398, 'superpose-bind')
^  Fail: (277) [user] symbol_concat($, _404398, 'superpose-bind')
^  Redo: (276) [user] mfix_vars1('superpose-bind', _396974)
^  Unify: (276) [user] mfix_vars1('superpose-bind', _396974)
   Call: (277) [system] 'superpose-bind'==true
^  Redo: (276) [user] mfix_vars1('superpose-bind', _396974)
^  Unify: (276) [user] mfix_vars1('superpose-bind', _396974)
   Call: (277) [system] 'superpose-bind'==false
^  Redo: (276) [user] mfix_vars1('superpose-bind', _396974)
^  Unify: (276) [user] mfix_vars1('superpose-bind', _396974)
   Call: (277) [system] 'superpose-bind'==[_416486, _416492]
^  Redo: (276) [user] mfix_vars1('superpose-bind', _396974)
^  Unify: (276) [user] mfix_vars1('superpose-bind', _396974)
   Call: (277) [system] is_list('superpose-bind')
^  Redo: (276) [user] mfix_vars1('superpose-bind', _396974)
^  Unify: (276) [user] mfix_vars1('superpose-bind', _396974)
   Call: (277) [system] string('superpose-bind')
^  Redo: (276) [user] mfix_vars1('superpose-bind', _396974)
^  Unify: (276) [user] mfix_vars1('superpose-bind', _396974)
   Call: (277) [system] compound('superpose-bind')
^  Redo: (276) [user] mfix_vars1('superpose-bind', _396974)
^  Unify: (276) [user] mfix_vars1('superpose-bind', _396974)
^  Call: (277) [user] symbol('superpose-bind')
^  Unify: (277) [user] symbol('superpose-bind')
   Call: (278) [system] atom('superpose-bind')
   Exit: (278) [system] atom('superpose-bind')
^  Exit: (277) [user] symbol('superpose-bind')
^  Unify: (276) [user] mfix_vars1('superpose-bind', 'superpose-bind')
^  Exit: (276) [user] mfix_vars1('superpose-bind', 'superpose-bind')
   Call: (276) [apply] apply:maplist_([[->, 'Expression', 'Atom']], _396976, user:mfix_vars1)
   Unify: (276) [apply] apply:maplist_([[->, 'Expression', 'Atom']], [_435030|_435032], user:mfix_vars1)
^  Call: (277) [user] mfix_vars1([->, 'Expression', 'Atom'], _435030)
^  Unify: (277) [user] mfix_vars1([->, 'Expression', 'Atom'], _435030)
   Call: (278) [system] var([->, 'Expression', 'Atom'])
^  Redo: (277) [user] mfix_vars1([->, 'Expression', 'Atom'], _435030)
^  Unify: (277) [user] mfix_vars1([->, 'Expression', 'Atom'], '$VAR'(_439676))
   Call: (278) [system] atom([->, 'Expression', 'Atom'])
^  Redo: (277) [user] mfix_vars1([->, 'Expression', 'Atom'], _435030)
^  Unify: (277) [user] mfix_vars1([->, 'Expression', 'Atom'], _435030)
   Call: (278) [system] [->, 'Expression', 'Atom']==true
^  Redo: (277) [user] mfix_vars1([->, 'Expression', 'Atom'], _435030)
^  Unify: (277) [user] mfix_vars1([->, 'Expression', 'Atom'], _435030)
   Call: (278) [system] [->, 'Expression', 'Atom']==false
^  Redo: (277) [user] mfix_vars1([->, 'Expression', 'Atom'], _435030)
^  Unify: (277) [user] mfix_vars1([->, 'Expression', 'Atom'], _435030)
   Call: (278) [system] (->)=='['
^  Redo: (277) [user] mfix_vars1([->, 'Expression', 'Atom'], _435030)
^  Unify: (277) [user] mfix_vars1([->, 'Expression', 'Atom'], _435030)
   Call: (278) [system] (->)=='{'
^  Redo: (277) [user] mfix_vars1([->, 'Expression', 'Atom'], _435030)
^  Unify: (277) [user] mfix_vars1([->, 'Expression', 'Atom'], _435030)
   Call: (278) [system] is_list(['Expression', 'Atom'])
   Exit: (278) [system] is_list(['Expression', 'Atom'])
   Call: (278) [lists] lists:last(['Expression', 'Atom'], _456370)
   Unify: (278) [lists] lists:last(['Expression', 'Atom'], _456370)
   Call: (279) [lists] lists:last_(['Atom'], 'Expression', _456370)
   Unify: (279) [lists] lists:last_(['Atom'], 'Expression', _456370)
   Call: (280) [lists] lists:last_([], 'Atom', _456370)
   Unify: (280) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (280) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (279) [lists] lists:last_(['Atom'], 'Expression', 'Atom')
   Exit: (278) [lists] lists:last(['Expression', 'Atom'], 'Atom')
   Call: (278) [system] 'Atom'=='}'
^  Redo: (277) [user] mfix_vars1([->, 'Expression', 'Atom'], _435030)
^  Unify: (277) [user] mfix_vars1([->, 'Expression', 'Atom'], _435030)
   Call: (278) [system] [->, 'Expression', 'Atom']==[_467534, _467540]
^  Redo: (277) [user] mfix_vars1([->, 'Expression', 'Atom'], _435030)
^  Unify: (277) [user] mfix_vars1([->, 'Expression', 'Atom'], _435030)
   Call: (278) [system] fail
^  Redo: (277) [user] mfix_vars1([->, 'Expression', 'Atom'], _435030)
^  Unify: (277) [user] mfix_vars1([->, 'Expression', 'Atom'], _435030)
   Call: (278) [system] is_list([->, 'Expression', 'Atom'])
   Exit: (278) [system] is_list([->, 'Expression', 'Atom'])
^  Call: (278) [user] apply:maplist(mfix_vars1, [->, 'Expression', 'Atom'], _435030)
^  Unify: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Expression', 'Atom'], _435030)
   Call: (279) [apply] apply:maplist_([->, 'Expression', 'Atom'], _435030, user:mfix_vars1)
   Unify: (279) [apply] apply:maplist_([->, 'Expression', 'Atom'], [_477764|_477766], user:mfix_vars1)
^  Call: (280) [user] mfix_vars1(->, _477764)
^  Unify: (280) [user] mfix_vars1(->, _477764)
   Call: (281) [system] var(->)
^  Redo: (280) [user] mfix_vars1(->, _477764)
^  Unify: (280) [user] mfix_vars1(->, '$VAR'(_482410))
   Call: (281) [system] atom(->)
   Exit: (281) [system] atom(->)
^  Call: (281) [user] symbol_concat($, _485188, ->)
^  Unify: (281) [user] symbol_concat($, _485188, ->)
   Call: (282) [system] atom_concat($, _485188, ->)
   Fail: (282) [system] atom_concat($, _485188, ->)
^  Fail: (281) [user] symbol_concat($, _485188, ->)
^  Redo: (280) [user] mfix_vars1(->, _477764)
^  Unify: (280) [user] mfix_vars1(->, _477764)
   Call: (281) [system] (->)==true
^  Redo: (280) [user] mfix_vars1(->, _477764)
^  Unify: (280) [user] mfix_vars1(->, _477764)
   Call: (281) [system] (->)==false
^  Redo: (280) [user] mfix_vars1(->, _477764)
^  Unify: (280) [user] mfix_vars1(->, _477764)
   Call: (281) [system] (->)==[_497276, _497282]
^  Redo: (280) [user] mfix_vars1(->, _477764)
^  Unify: (280) [user] mfix_vars1(->, _477764)
   Call: (281) [system] is_list(->)
^  Redo: (280) [user] mfix_vars1(->, _477764)
^  Unify: (280) [user] mfix_vars1(->, _477764)
   Call: (281) [system] string(->)
^  Redo: (280) [user] mfix_vars1(->, _477764)
^  Unify: (280) [user] mfix_vars1(->, _477764)
   Call: (281) [system] compound(->)
^  Redo: (280) [user] mfix_vars1(->, _477764)
^  Unify: (280) [user] mfix_vars1(->, _477764)
^  Call: (281) [user] symbol(->)
^  Unify: (281) [user] symbol(->)
   Call: (282) [system] atom(->)
   Exit: (282) [system] atom(->)
^  Exit: (281) [user] symbol(->)
^  Unify: (280) [user] mfix_vars1(->, ->)
^  Exit: (280) [user] mfix_vars1(->, ->)
   Call: (280) [apply] apply:maplist_(['Expression', 'Atom'], _477766, user:mfix_vars1)
   Unify: (280) [apply] apply:maplist_(['Expression', 'Atom'], [_515820|_515822], user:mfix_vars1)
^  Call: (281) [user] mfix_vars1('Expression', _515820)
^  Unify: (281) [user] mfix_vars1('Expression', _515820)
   Call: (282) [system] var('Expression')
^  Redo: (281) [user] mfix_vars1('Expression', _515820)
^  Unify: (281) [user] mfix_vars1('Expression', '$VAR'(_520466))
   Call: (282) [system] atom('Expression')
   Exit: (282) [system] atom('Expression')
^  Call: (282) [user] symbol_concat($, _6052, 'Expression')
^  Unify: (282) [user] symbol_concat($, _6052, 'Expression')
   Call: (283) [system] atom_concat($, _6052, 'Expression')
   Fail: (283) [system] atom_concat($, _6052, 'Expression')
^  Fail: (282) [user] symbol_concat($, _6052, 'Expression')
^  Redo: (281) [user] mfix_vars1('Expression', _6042)
^  Unify: (281) [user] mfix_vars1('Expression', _6042)
   Call: (282) [system] 'Expression'==true
^  Redo: (281) [user] mfix_vars1('Expression', _6042)
^  Unify: (281) [user] mfix_vars1('Expression', _6042)
   Call: (282) [system] 'Expression'==false
^  Redo: (281) [user] mfix_vars1('Expression', _6042)
^  Unify: (281) [user] mfix_vars1('Expression', _6042)
   Call: (282) [system] 'Expression'==[_17560, _17566]
^  Redo: (281) [user] mfix_vars1('Expression', _6042)
^  Unify: (281) [user] mfix_vars1('Expression', _6042)
   Call: (282) [system] is_list('Expression')
^  Redo: (281) [user] mfix_vars1('Expression', _6042)
^  Unify: (281) [user] mfix_vars1('Expression', _6042)
   Call: (282) [system] string('Expression')
^  Redo: (281) [user] mfix_vars1('Expression', _6042)
^  Unify: (281) [user] mfix_vars1('Expression', _6042)
   Call: (282) [system] compound('Expression')
^  Redo: (281) [user] mfix_vars1('Expression', _6042)
^  Unify: (281) [user] mfix_vars1('Expression', _6042)
^  Call: (282) [user] symbol('Expression')
^  Unify: (282) [user] symbol('Expression')
   Call: (283) [system] atom('Expression')
   Exit: (283) [system] atom('Expression')
^  Exit: (282) [user] symbol('Expression')
^  Unify: (281) [user] mfix_vars1('Expression', 'Expression')
^  Exit: (281) [user] mfix_vars1('Expression', 'Expression')
   Call: (281) [apply] apply:maplist_(['Atom'], _6044, user:mfix_vars1)
   Unify: (281) [apply] apply:maplist_(['Atom'], [_36104|_36106], user:mfix_vars1)
^  Call: (282) [user] mfix_vars1('Atom', _36104)
^  Unify: (282) [user] mfix_vars1('Atom', _36104)
   Call: (283) [system] var('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _36104)
^  Unify: (282) [user] mfix_vars1('Atom', '$VAR'(_40750))
   Call: (283) [system] atom('Atom')
   Exit: (283) [system] atom('Atom')
^  Call: (283) [user] symbol_concat($, _43528, 'Atom')
^  Unify: (283) [user] symbol_concat($, _43528, 'Atom')
   Call: (284) [system] atom_concat($, _43528, 'Atom')
   Fail: (284) [system] atom_concat($, _43528, 'Atom')
^  Fail: (283) [user] symbol_concat($, _43528, 'Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _36104)
^  Unify: (282) [user] mfix_vars1('Atom', _36104)
   Call: (283) [system] 'Atom'==true
^  Redo: (282) [user] mfix_vars1('Atom', _36104)
^  Unify: (282) [user] mfix_vars1('Atom', _36104)
   Call: (283) [system] 'Atom'==false
^  Redo: (282) [user] mfix_vars1('Atom', _36104)
^  Unify: (282) [user] mfix_vars1('Atom', _36104)
   Call: (283) [system] 'Atom'==[_55616, _55622]
^  Redo: (282) [user] mfix_vars1('Atom', _36104)
^  Unify: (282) [user] mfix_vars1('Atom', _36104)
   Call: (283) [system] is_list('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _36104)
^  Unify: (282) [user] mfix_vars1('Atom', _36104)
   Call: (283) [system] string('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _36104)
^  Unify: (282) [user] mfix_vars1('Atom', _36104)
   Call: (283) [system] compound('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _36104)
^  Unify: (282) [user] mfix_vars1('Atom', _36104)
^  Call: (283) [user] symbol('Atom')
^  Unify: (283) [user] symbol('Atom')
   Call: (284) [system] atom('Atom')
   Exit: (284) [system] atom('Atom')
^  Exit: (283) [user] symbol('Atom')
^  Unify: (282) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (282) [user] mfix_vars1('Atom', 'Atom')
   Call: (282) [apply] apply:maplist_([], _36106, user:mfix_vars1)
   Unify: (282) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (282) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (281) [apply] apply:maplist_(['Atom'], ['Atom'], user:mfix_vars1)
   Exit: (280) [apply] apply:maplist_(['Expression', 'Atom'], ['Expression', 'Atom'], user:mfix_vars1)
   Exit: (279) [apply] apply:maplist_([->, 'Expression', 'Atom'], [->, 'Expression', 'Atom'], user:mfix_vars1)
^  Exit: (278) [apply] apply:maplist(user:mfix_vars1, [->, 'Expression', 'Atom'], [->, 'Expression', 'Atom'])
^  Exit: (277) [user] mfix_vars1([->, 'Expression', 'Atom'], [->, 'Expression', 'Atom'])
   Call: (277) [apply] apply:maplist_([], _6026, user:mfix_vars1)
   Unify: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (277) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (276) [apply] apply:maplist_([[->, 'Expression', 'Atom']], [[->, 'Expression', 'Atom']], user:mfix_vars1)
   Exit: (275) [apply] apply:maplist_(['superpose-bind', [->, 'Expression', 'Atom']], ['superpose-bind', [->, 'Expression', 'Atom']], user:mfix_vars1)
   Exit: (274) [apply] apply:maplist_([:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']], user:mfix_vars1)
^  Exit: (273) [apply] apply:maplist(user:mfix_vars1, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Exit: (272) [user] mfix_vars1([:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Exit: (271) [system] call(user:mfix_vars1, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Exit: (270) [system] once(user:call(mfix_vars1, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']]))
   Call: (270) [system] [:, 'superpose-bind', [->, 'Expression', 'Atom']]\=@=[:, 'superpose-bind', [->, 'Expression', 'Atom']]
^  Redo: (269) [user] trly(mfix_vars1, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _5976)
^  Unify: (269) [user] trly(mfix_vars1, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Exit: (269) [user] trly(mfix_vars1, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Exit: (268) [system] once(user:trly(mfix_vars1, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(mfix_vars1, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_c, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _95594))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_c, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _95594))
^  Call: (268) [user] once(user:trly(cons_to_c, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _95594))
^  Unify: (268) [system] once(user:trly(cons_to_c, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _95594))
^  Call: (269) [user] trly(cons_to_c, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _95594)
^  Unify: (269) [user] trly(cons_to_c, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _95594)
^  Call: (270) [user] once(call(cons_to_c, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _101180))
^  Unify: (270) [system] once(user:call(cons_to_c, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _101180))
^  Call: (271) [user] call(cons_to_c, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _101180)
^  Unify: (271) [system] call(user:cons_to_c, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _101180)
^  Call: (272) [user] cons_to_c([:, 'superpose-bind', [->, 'Expression', 'Atom']], _101180)
^  Unify: (272) [user] cons_to_c([:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_c([:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Exit: (271) [system] call(user:cons_to_c, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Exit: (270) [system] once(user:call(cons_to_c, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']]))
   Call: (270) [system] [:, 'superpose-bind', [->, 'Expression', 'Atom']]\=@=[:, 'superpose-bind', [->, 'Expression', 'Atom']]
^  Redo: (269) [user] trly(cons_to_c, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _95594)
^  Unify: (269) [user] trly(cons_to_c, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Exit: (269) [user] trly(cons_to_c, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Exit: (268) [system] once(user:trly(cons_to_c, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_c, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']]))
^  Call: (267) [user] must_det_ll(trly(cons_to_l, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _5956))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_l, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _5956))
^  Call: (268) [user] once(user:trly(cons_to_l, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _5956))
^  Unify: (268) [system] once(user:trly(cons_to_l, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _5956))
^  Call: (269) [user] trly(cons_to_l, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _5956)
^  Unify: (269) [user] trly(cons_to_l, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _5956)
^  Call: (270) [user] once(call(cons_to_l, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _123500))
^  Unify: (270) [system] once(user:call(cons_to_l, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _123500))
^  Call: (271) [user] call(cons_to_l, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _123500)
^  Unify: (271) [system] call(user:cons_to_l, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _123500)
^  Call: (272) [user] cons_to_l([:, 'superpose-bind', [->, 'Expression', 'Atom']], _123500)
^  Unify: (272) [user] cons_to_l([:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_l([:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Exit: (271) [system] call(user:cons_to_l, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Exit: (270) [system] once(user:call(cons_to_l, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']]))
   Call: (270) [system] [:, 'superpose-bind', [->, 'Expression', 'Atom']]\=@=[:, 'superpose-bind', [->, 'Expression', 'Atom']]
^  Redo: (269) [user] trly(cons_to_l, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _5956)
^  Unify: (269) [user] trly(cons_to_l, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Exit: (269) [user] trly(cons_to_l, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Exit: (268) [system] once(user:trly(cons_to_l, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_l, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']]))
^  Exit: (266) [user] untyped_to_metta([:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Exit: (265) [system] call(user:untyped_to_metta, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Exit: (264) [system] once(user:call(untyped_to_metta, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']]))
   Call: (264) [system] [:, 'superpose-bind', [->, 'Expression', 'Atom']]\=@=[:, 'superpose-bind', [->, 'Expression', 'Atom']]
^  Redo: (263) [user] trly(untyped_to_metta, [:, 'superpose-bind', [->, 'Expression', 'Atom']], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Exit: (263) [user] trly(untyped_to_metta, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Exit: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Expression', 'Atom']])
   Call: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Expression', 'Atom']])))
   Unify: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Expression', 'Atom']])))
   Exit: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Expression', 'Atom']])))
^  Exit: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Exit: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Expression', 'Atom']])
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Expression', 'Atom']])))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Expression', 'Atom']])))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Expression', 'Atom']])))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), [:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Call: (257) [user] subst_vars([:, 'superpose-bind', [->, 'Expression', 'Atom']], _157808, [], _157810)
^  Unify: (257) [user] subst_vars([:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']], [], [])
   Call: (258) [system] var([:, 'superpose-bind', [->, 'Expression', 'Atom']])
^  Redo: (257) [user] subst_vars([:, 'superpose-bind', [->, 'Expression', 'Atom']], _157808, [], _157810)
^  Unify: (257) [user] subst_vars([:, 'superpose-bind', [->, 'Expression', 'Atom']], [_161546|_161548], [], _157810)
^  Call: (258) [user] subst_vars(:, _161546, [], _162486)
^  Unify: (258) [user] subst_vars(:, :, [], [])
   Call: (259) [system] var(:)
^  Redo: (258) [user] subst_vars(:, _161546, [], _162486)
^  Unify: (258) [user] subst_vars(:, _161546, [], _162486)
   Call: (259) [system] atom(:)
   Exit: (259) [system] atom(:)
^  Call: (259) [user] symbol_concat($, _169004, :)
^  Unify: (259) [user] symbol_concat($, _169004, :)
   Call: (260) [system] atom_concat($, _169004, :)
   Fail: (260) [system] atom_concat($, _169004, :)
^  Fail: (259) [user] symbol_concat($, _169004, :)
^  Redo: (258) [user] subst_vars(:, _161546, [], _162486)
^  Unify: (258) [user] subst_vars(:, _161546, [], _162486)
   Call: (259) [system] compound(:)
^  Redo: (258) [user] subst_vars(:, _161546, [], _162486)
^  Unify: (258) [user] subst_vars(:, :, [], [])
^  Exit: (258) [user] subst_vars(:, :, [], [])
^  Call: (258) [user] subst_vars(['superpose-bind', [->, 'Expression', 'Atom']], _161548, [], _157810)
^  Unify: (258) [user] subst_vars(['superpose-bind', [->, 'Expression', 'Atom']], ['superpose-bind', [->, 'Expression', 'Atom']], [], [])
   Call: (259) [system] var(['superpose-bind', [->, 'Expression', 'Atom']])
^  Redo: (258) [user] subst_vars(['superpose-bind', [->, 'Expression', 'Atom']], _161548, [], _157810)
^  Unify: (258) [user] subst_vars(['superpose-bind', [->, 'Expression', 'Atom']], [_183004|_183006], [], _157810)
^  Call: (259) [user] subst_vars('superpose-bind', _183004, [], _183944)
^  Unify: (259) [user] subst_vars('superpose-bind', 'superpose-bind', [], [])
   Call: (260) [system] var('superpose-bind')
^  Redo: (259) [user] subst_vars('superpose-bind', _183004, [], _183944)
^  Unify: (259) [user] subst_vars('superpose-bind', _183004, [], _183944)
   Call: (260) [system] atom('superpose-bind')
   Exit: (260) [system] atom('superpose-bind')
^  Call: (260) [user] symbol_concat($, _190462, 'superpose-bind')
^  Unify: (260) [user] symbol_concat($, _190462, 'superpose-bind')
   Call: (261) [system] atom_concat($, _190462, 'superpose-bind')
   Fail: (261) [system] atom_concat($, _190462, 'superpose-bind')
^  Fail: (260) [user] symbol_concat($, _190462, 'superpose-bind')
^  Redo: (259) [user] subst_vars('superpose-bind', _183004, [], _183944)
^  Unify: (259) [user] subst_vars('superpose-bind', _183004, [], _183944)
   Call: (260) [system] compound('superpose-bind')
^  Redo: (259) [user] subst_vars('superpose-bind', _183004, [], _183944)
^  Unify: (259) [user] subst_vars('superpose-bind', 'superpose-bind', [], [])
^  Exit: (259) [user] subst_vars('superpose-bind', 'superpose-bind', [], [])
^  Call: (259) [user] subst_vars([[->, 'Expression', 'Atom']], _183006, [], _157810)
^  Unify: (259) [user] subst_vars([[->, 'Expression', 'Atom']], [[->, 'Expression', 'Atom']], [], [])
   Call: (260) [system] var([[->, 'Expression', 'Atom']])
^  Redo: (259) [user] subst_vars([[->, 'Expression', 'Atom']], _183006, [], _157810)
^  Unify: (259) [user] subst_vars([[->, 'Expression', 'Atom']], [_204462|_204464], [], _157810)
^  Call: (260) [user] subst_vars([->, 'Expression', 'Atom'], _204462, [], _205402)
^  Unify: (260) [user] subst_vars([->, 'Expression', 'Atom'], [->, 'Expression', 'Atom'], [], [])
   Call: (261) [system] var([->, 'Expression', 'Atom'])
^  Redo: (260) [user] subst_vars([->, 'Expression', 'Atom'], _204462, [], _205402)
^  Unify: (260) [user] subst_vars([->, 'Expression', 'Atom'], [_209138|_209140], [], _205402)
^  Call: (261) [user] subst_vars(->, _209138, [], _210078)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
   Call: (262) [system] var(->)
^  Redo: (261) [user] subst_vars(->, _209138, [], _210078)
^  Unify: (261) [user] subst_vars(->, _209138, [], _210078)
   Call: (262) [system] atom(->)
   Exit: (262) [system] atom(->)
^  Call: (262) [user] symbol_concat($, _216596, ->)
^  Unify: (262) [user] symbol_concat($, _216596, ->)
   Call: (263) [system] atom_concat($, _216596, ->)
   Fail: (263) [system] atom_concat($, _216596, ->)
^  Fail: (262) [user] symbol_concat($, _216596, ->)
^  Redo: (261) [user] subst_vars(->, _209138, [], _210078)
^  Unify: (261) [user] subst_vars(->, _209138, [], _210078)
   Call: (262) [system] compound(->)
^  Redo: (261) [user] subst_vars(->, _209138, [], _210078)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
^  Exit: (261) [user] subst_vars(->, ->, [], [])
^  Call: (261) [user] subst_vars(['Expression', 'Atom'], _209140, [], _205402)
^  Unify: (261) [user] subst_vars(['Expression', 'Atom'], ['Expression', 'Atom'], [], [])
   Call: (262) [system] var(['Expression', 'Atom'])
^  Redo: (261) [user] subst_vars(['Expression', 'Atom'], _209140, [], _205402)
^  Unify: (261) [user] subst_vars(['Expression', 'Atom'], [_230596|_230598], [], _205402)
^  Call: (262) [user] subst_vars('Expression', _230596, [], _231536)
^  Unify: (262) [user] subst_vars('Expression', 'Expression', [], [])
   Call: (263) [system] var('Expression')
^  Redo: (262) [user] subst_vars('Expression', _230596, [], _231536)
^  Unify: (262) [user] subst_vars('Expression', _230596, [], _231536)
   Call: (263) [system] atom('Expression')
   Exit: (263) [system] atom('Expression')
^  Call: (263) [user] symbol_concat($, _238054, 'Expression')
^  Unify: (263) [user] symbol_concat($, _238054, 'Expression')
   Call: (264) [system] atom_concat($, _238054, 'Expression')
   Fail: (264) [system] atom_concat($, _238054, 'Expression')
^  Fail: (263) [user] symbol_concat($, _238054, 'Expression')
^  Redo: (262) [user] subst_vars('Expression', _230596, [], _231536)
^  Unify: (262) [user] subst_vars('Expression', _230596, [], _231536)
   Call: (263) [system] compound('Expression')
^  Redo: (262) [user] subst_vars('Expression', _230596, [], _231536)
^  Unify: (262) [user] subst_vars('Expression', 'Expression', [], [])
^  Exit: (262) [user] subst_vars('Expression', 'Expression', [], [])
^  Call: (262) [user] subst_vars(['Atom'], _230598, [], _205402)
^  Unify: (262) [user] subst_vars(['Atom'], ['Atom'], [], [])
   Call: (263) [system] var(['Atom'])
^  Redo: (262) [user] subst_vars(['Atom'], _230598, [], _205402)
^  Unify: (262) [user] subst_vars(['Atom'], [_252054|_252056], [], _205402)
^  Call: (263) [user] subst_vars('Atom', _252054, [], _252994)
^  Unify: (263) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (264) [system] var('Atom')
^  Redo: (263) [user] subst_vars('Atom', _252054, [], _252994)
^  Unify: (263) [user] subst_vars('Atom', _252054, [], _252994)
   Call: (264) [system] atom('Atom')
   Exit: (264) [system] atom('Atom')
^  Call: (264) [user] symbol_concat($, _259512, 'Atom')
^  Unify: (264) [user] symbol_concat($, _259512, 'Atom')
   Call: (265) [system] atom_concat($, _259512, 'Atom')
   Fail: (265) [system] atom_concat($, _259512, 'Atom')
^  Fail: (264) [user] symbol_concat($, _259512, 'Atom')
^  Redo: (263) [user] subst_vars('Atom', _252054, [], _252994)
^  Unify: (263) [user] subst_vars('Atom', _252054, [], _252994)
   Call: (264) [system] compound('Atom')
^  Redo: (263) [user] subst_vars('Atom', _252054, [], _252994)
^  Unify: (263) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (263) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (263) [user] subst_vars([], _252056, [], _205402)
^  Unify: (263) [user] subst_vars([], [], [], [])
   Call: (264) [system] var([])
^  Redo: (263) [user] subst_vars([], _252056, [], _205402)
^  Unify: (263) [user] subst_vars([], [], [], [])
^  Exit: (263) [user] subst_vars([], [], [], [])
^  Exit: (262) [user] subst_vars(['Atom'], ['Atom'], [], [])
^  Exit: (261) [user] subst_vars(['Expression', 'Atom'], ['Expression', 'Atom'], [], [])
^  Exit: (260) [user] subst_vars([->, 'Expression', 'Atom'], [->, 'Expression', 'Atom'], [], [])
^  Call: (260) [user] subst_vars([], _204464, [], _157810)
^  Unify: (260) [user] subst_vars([], [], [], [])
   Call: (261) [system] var([])
^  Redo: (260) [user] subst_vars([], _204464, [], _157810)
^  Unify: (260) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([], [], [], [])
^  Exit: (259) [user] subst_vars([[->, 'Expression', 'Atom']], [[->, 'Expression', 'Atom']], [], [])
^  Exit: (258) [user] subst_vars(['superpose-bind', [->, 'Expression', 'Atom']], ['superpose-bind', [->, 'Expression', 'Atom']], [], [])
^  Exit: (257) [user] subst_vars([:, 'superpose-bind', [->, 'Expression', 'Atom']], [:, 'superpose-bind', [->, 'Expression', 'Atom']], [], [])
   Call: (257) [system] _286602=metta_file_buffer(+, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(541, 17, 38, 541))
   Exit: (257) [system] metta_file_buffer(+, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(541, 17, 38, 541))=metta_file_buffer(+, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(541, 17, 38, 541))
^  Call: (257) [user] assertz(metta_file_buffer(+, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(541, 17, 38, 541)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(541, 17, 38, 541)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(541, 17, 38, 541))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(541, 17, 38, 541))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(541, 17, 38, 541))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'superpose-bind', [->, 'Expression', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(541, 17, 38, 541))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
   Redo: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _337396)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _338334))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _338334)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 581)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _337396)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _337396)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_337396))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_337396))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_337396))
   Exit: (259) [system] nonvar(position(_337396))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(581, 18, 39, 581)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(581, 18, 39, 581))
   Call: (257) [user] current_read_mode(file, _357814)
   Unify: (257) [user] current_read_mode(file, _357814)
   Call: (258) [system] nb_current(file_mode, _357814)
   Redo: (257) [user] current_read_mode(file, _357814)
   Call: (258) [system] _357814=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _364264)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _364264)
^  Call: (258) [user] clause(t_l:s_reader_info(_364264), _366210, _366132)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _364264)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _364264)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _364264)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _364264)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _364264)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _364264)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _364264)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _364264)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _380040)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (260) [system] char_type('\n', space)
   Exit: (260) [system] char_type('\n', space)
   Call: (260) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (260) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _364264)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _364264)
   Call: (261) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _364264)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _364264)
   Call: (261) [system] peek_char((0x55aefe44e2f0), _390246)
   Exit: (261) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (261) [system] char_type('\n', space)
   Exit: (261) [system] char_type('\n', space)
   Call: (261) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (261) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _364264)
^  Unify: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _364264)
   Call: (262) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _364264)
^  Unify: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _364264)
   Call: (262) [system] peek_char((0x55aefe44e2f0), _400452)
   Exit: (262) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (262) [system] char_type('(', space)
^  Redo: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _364264)
^  Unify: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _364264)
^  Call: (262) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (262) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (263) [system] string((0x55aefe44e2f0))
^  Redo: (262) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (262) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (262) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _364264)
^  Unify: (262) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _364264)
^  Call: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _364264)
^  Unify: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _364264)
   Call: (264) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _364264)
^  Unify: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _364264)
   Call: (264) [system] peek_char((0x55aefe44e2f0), _416206)
   Exit: (264) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (264) [system] char_type('(', space)
^  Redo: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _364264)
^  Unify: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _364264)
   Call: (264) [system] _420848=(0x55aefe44e2f0)
   Exit: (264) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (264) [user] once((read_position((0x55aefe44e2f0), _422716, _422718, _422720, _422722), read_sexpr((0x55aefe44e2f0), _422734), assertz(metta_file_comment(_422716, _422718, _422720, _422734, _422722))))
^  Unify: (264) [system] once(user:(read_position((0x55aefe44e2f0), _422716, _422718, _422720, _422722), read_sexpr((0x55aefe44e2f0), _422734), assertz(metta_file_comment(_422716, _422718, _422720, _422734, _422722))))
^  Call: (266) [user] read_position((0x55aefe44e2f0), _422716, _422718, _422720, _422722)
^  Unify: (266) [user] read_position((0x55aefe44e2f0), _422716, _422718, _422720, _422722)
   Call: (267) [system] stream_property((0x55aefe44e2f0), position(_422722))
   Unify: (267) [system] stream_property((0x55aefe44e2f0), position(_422722))
   Call: (268) [system] nonvar((0x55aefe44e2f0))
   Exit: (268) [system] nonvar((0x55aefe44e2f0))
   Call: (268) [system] nonvar(position(_422722))
   Exit: (268) [system] nonvar(position(_422722))
   Exit: (267) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(583, 20, 0, 583)))
   Call: (267) [$syspreds] stream_position_data(line_count, '$stream_position'(583, 20, 0, 583), _422716)
   Unify: (267) [$syspreds] stream_position_data(line_count, '$stream_position'(583, 20, 0, 583), _422716)
   Call: (268) [system] nonvar(line_count)
   Exit: (268) [system] nonvar(line_count)
   Call: (268) [$syspreds] stream_position_field(line_count, _436704)
   Unify: (268) [$syspreds] stream_position_field(line_count, 2)
   Exit: (268) [$syspreds] stream_position_field(line_count, 2)
   Call: (268) [system] arg(2, '$stream_position'(583, 20, 0, 583), _422716)
   Exit: (268) [system] arg(2, '$stream_position'(583, 20, 0, 583), 20)
   Exit: (267) [$syspreds] stream_position_data(line_count, '$stream_position'(583, 20, 0, 583), 20)
   Call: (267) [$syspreds] stream_position_data(line_position, '$stream_position'(583, 20, 0, 583), _422718)
   Unify: (267) [$syspreds] stream_position_data(line_position, '$stream_position'(583, 20, 0, 583), _422718)
   Call: (268) [system] nonvar(line_position)
   Exit: (268) [system] nonvar(line_position)
   Call: (268) [$syspreds] stream_position_field(line_position, _445998)
   Unify: (268) [$syspreds] stream_position_field(line_position, 3)
   Exit: (268) [$syspreds] stream_position_field(line_position, 3)
   Call: (268) [system] arg(3, '$stream_position'(583, 20, 0, 583), _422718)
   Exit: (268) [system] arg(3, '$stream_position'(583, 20, 0, 583), 0)
   Exit: (267) [$syspreds] stream_position_data(line_position, '$stream_position'(583, 20, 0, 583), 0)
   Call: (267) [$syspreds] stream_position_data(char_count, '$stream_position'(583, 20, 0, 583), _422720)
   Unify: (267) [$syspreds] stream_position_data(char_count, '$stream_position'(583, 20, 0, 583), _422720)
   Call: (268) [system] nonvar(char_count)
   Exit: (268) [system] nonvar(char_count)
   Call: (268) [$syspreds] stream_position_field(char_count, _455292)
   Unify: (268) [$syspreds] stream_position_field(char_count, 1)
   Exit: (268) [$syspreds] stream_position_field(char_count, 1)
   Call: (268) [system] arg(1, '$stream_position'(583, 20, 0, 583), _422720)
   Exit: (268) [system] arg(1, '$stream_position'(583, 20, 0, 583), 583)
   Exit: (267) [$syspreds] stream_position_data(char_count, '$stream_position'(583, 20, 0, 583), 583)
^  Exit: (266) [user] read_position((0x55aefe44e2f0), 20, 0, 583, '$stream_position'(583, 20, 0, 583))
^  Call: (266) [user] read_sexpr((0x55aefe44e2f0), _422734)
^  Unify: (266) [user] read_sexpr((0x55aefe44e2f0), _422734)
   Call: (267) [system] string((0x55aefe44e2f0))
^  Redo: (266) [user] read_sexpr((0x55aefe44e2f0), _422734)
^  Unify: (266) [user] read_sexpr((0x55aefe44e2f0), _422734)
^  Call: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), _422734)
^  Unify: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), _422734)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _470162)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (269) [system] '('=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', 'white')
^  Redo: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', end_of_line)
^  Redo: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', space)
^  Redo: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] get_char((0x55aefe44e2f0), _486946)
   Exit: (268) [system] get_char((0x55aefe44e2f0), '(')
   Call: (268) [system] '('='('
   Exit: (268) [system] '('='('
^  Call: (268) [user] read_list(')', (0x55aefe44e2f0), _422734)
^  Unify: (268) [user] read_list(')', (0x55aefe44e2f0), _422734)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _494372)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, 'white')
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, end_of_line)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, space)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, cntrl)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _511156)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)=')'
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _422734)
   Call: (269) [system] (:)=end_of_file
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _422734)
^  Call: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _516734)
^  Unify: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _516734)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _520448)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), :)
   Call: (271) [system] (:)=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(:)
^  Unify: (271) [user] is_like_space(:)
   Call: (272) [system] char_type(:, 'white')
^  Redo: (271) [user] is_like_space(:)
^  Unify: (271) [user] is_like_space(:)
   Call: (272) [system] char_type(:, end_of_line)
^  Redo: (271) [user] is_like_space(:)
^  Unify: (271) [user] is_like_space(:)
   Call: (272) [system] char_type(:, space)
^  Redo: (271) [user] is_like_space(:)
^  Unify: (271) [user] is_like_space(:)
   Call: (272) [system] char_type(:, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] get_char((0x55aefe44e2f0), _19036)
   Exit: (270) [system] get_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)='('
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5982)
   Call: (270) [system] (:)='['
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5982)
   Call: (270) [system] (:)='{'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5982)
   Call: (270) [system] (:)='"'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5982)
   Call: (270) [system] (:)=!
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5982)
   Call: (270) [system] (:)='\''
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5982)
   Call: (270) [system] (:)='`'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5982)
   Call: (270) [system] (:)=end_of_file
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5982)
^  Call: (270) [user] read_symbolic(')', (0x55aefe44e2f0), :, _5982)
^  Unify: (270) [user] read_symbolic(')', (0x55aefe44e2f0), :, _5982)
^  Call: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _37646)
^  Unify: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _37646)
   Call: (272) [system] peek_char((0x55aefe44e2f0), _39512)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (272) [user] is_delimiter(' ')
^  Unify: (272) [user] is_delimiter(' ')
   Call: (273) [system] char_type(' ', space)
   Exit: (273) [system] char_type(' ', space)
^  Exit: (272) [user] is_delimiter(' ')
   Call: (272) [system] _37646=[]
   Exit: (272) [system] []=[]
^  Exit: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (271) [user] classify_and_convert_charseq(:, [], _5982)
^  Unify: (271) [user] classify_and_convert_charseq(:, [], _5982)
^  Call: (273) [system] setup_call_cleanup('$notrace'(_50678, _50680), once(user:catch(read_from_chars([:], _5982), _50654, fail)), '$restore_trace'(_50678, _50680))
^  Unify: (273) [system] setup_call_cleanup(system:'$notrace'(_50678, _50680), system:once(user:catch(read_from_chars([:], _5982), _50654, fail)), system:'$restore_trace'(_50678, _50680))
^  Call: (274) [system] sig_atomic(system:'$notrace'(_50678, _50680))
^  Exit: (273) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([:], :), _50654, fail)), system:'$restore_trace'(3, -1))
   Call: (272) [system] atomic(:)
   Exit: (272) [system] atomic(:)
^  Exit: (271) [user] classify_and_convert_charseq(:, [], :)
^  Exit: (270) [user] read_symbolic(')', (0x55aefe44e2f0), :, :)
^  Exit: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), :)
^  Call: (269) [user] read_list(')', (0x55aefe44e2f0), _59116)
^  Unify: (269) [user] read_list(')', (0x55aefe44e2f0), _59116)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _62830)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (271) [system] ' '=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(' ')
^  Unify: (271) [user] is_like_space(' ')
   Call: (272) [system] char_type(' ', 'white')
   Exit: (272) [system] char_type(' ', 'white')
^  Exit: (271) [user] is_like_space(' ')
   Call: (271) [system] get_char((0x55aefe44e2f0), _71488)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _75116)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), i)
   Call: (272) [system] i=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, 'white')
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, end_of_line)
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, space)
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _92824)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), i)
   Call: (270) [system] i=')'
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _59116)
   Call: (270) [system] i=end_of_file
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _59116)
^  Call: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _98402)
^  Unify: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _98402)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _102116)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), i)
   Call: (272) [system] i=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, 'white')
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, end_of_line)
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, space)
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] get_char((0x55aefe44e2f0), _118900)
   Exit: (271) [system] get_char((0x55aefe44e2f0), i)
   Call: (271) [system] i='('
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _98402)
   Call: (271) [system] i='['
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _98402)
   Call: (271) [system] i='{'
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _98402)
   Call: (271) [system] i='"'
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _98402)
   Call: (271) [system] i=!
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _98402)
   Call: (271) [system] i='\''
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _98402)
   Call: (271) [system] i='`'
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _98402)
   Call: (271) [system] i=end_of_file
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _98402)
^  Call: (271) [user] read_symbolic(')', (0x55aefe44e2f0), i, _98402)
^  Unify: (271) [user] read_symbolic(')', (0x55aefe44e2f0), i, _98402)
^  Call: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137510)
^  Unify: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137510)
   Call: (273) [system] peek_char((0x55aefe44e2f0), _139376)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), d)
^  Call: (273) [user] is_delimiter(d)
^  Unify: (273) [user] is_delimiter(d)
   Call: (274) [system] char_type(d, space)
^  Redo: (273) [user] is_delimiter(d)
   Call: (274) [system] arg(_145016, v('(', ')', end_of_file), d)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137510)
   Call: (273) [system] ')'==d
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137510)
   Call: (273) [system] get_char((0x55aefe44e2f0), d)
   Exit: (273) [system] get_char((0x55aefe44e2f0), d)
   Call: (273) [system] d=(\)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137510)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152382)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152382)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _154248)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (274) [user] is_delimiter(' ')
^  Unify: (274) [user] is_delimiter(' ')
   Call: (275) [system] char_type(' ', space)
   Exit: (275) [system] char_type(' ', space)
^  Exit: (274) [user] is_delimiter(' ')
   Call: (274) [system] _152382=[]
   Exit: (274) [system] []=[]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (273) [system] _137510=[d]
   Exit: (273) [system] [d]=[d]
^  Exit: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [d])
^  Call: (272) [user] classify_and_convert_charseq(i, [d], _98402)
^  Unify: (272) [user] classify_and_convert_charseq(i, [d], _98402)
^  Call: (274) [system] setup_call_cleanup('$notrace'(_168208, _168210), once(user:catch(read_from_chars([i, d], _98402), _168184, fail)), '$restore_trace'(_168208, _168210))
^  Unify: (274) [system] setup_call_cleanup(system:'$notrace'(_168208, _168210), system:once(user:catch(read_from_chars([i, d], _98402), _168184, fail)), system:'$restore_trace'(_168208, _168210))
^  Call: (275) [system] sig_atomic(system:'$notrace'(_168208, _168210))
^  Exit: (274) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([i, d], id), _168184, fail)), system:'$restore_trace'(3, -1))
   Call: (273) [system] atomic(id)
   Exit: (273) [system] atomic(id)
^  Exit: (272) [user] classify_and_convert_charseq(i, [d], id)
^  Exit: (271) [user] read_symbolic(')', (0x55aefe44e2f0), i, id)
^  Exit: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), id)
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _176646)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _176646)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _180360)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (272) [system] ' '=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(' ')
^  Unify: (272) [user] is_like_space(' ')
   Call: (273) [system] char_type(' ', 'white')
   Exit: (273) [system] char_type(' ', 'white')
^  Exit: (272) [user] is_like_space(' ')
   Call: (272) [system] get_char((0x55aefe44e2f0), _189018)
   Exit: (272) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _192646)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (273) [system] '('=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', 'white')
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', end_of_line)
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', space)
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _210354)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('=')'
^  Redo: (270) [user] read_list(')', (0x55aefe44e2f0), _176646)
   Call: (271) [system] '('=end_of_file
^  Redo: (270) [user] read_list(')', (0x55aefe44e2f0), _176646)
^  Call: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _215932)
^  Unify: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _215932)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _219646)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (273) [system] '('=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', 'white')
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', end_of_line)
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', space)
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] get_char((0x55aefe44e2f0), _236430)
   Exit: (272) [system] get_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('='('
   Exit: (272) [system] '('='('
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _215932)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _215932)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _243856)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, 'white')
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, end_of_line)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, space)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _260640)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _215932)
   Call: (273) [system] (-)=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _215932)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _266218)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _266218)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _269932)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), -)
   Call: (275) [system] (-)=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(-)
^  Unify: (275) [user] is_like_space(-)
   Call: (276) [system] char_type(-, 'white')
^  Redo: (275) [user] is_like_space(-)
^  Unify: (275) [user] is_like_space(-)
   Call: (276) [system] char_type(-, end_of_line)
^  Redo: (275) [user] is_like_space(-)
^  Unify: (275) [user] is_like_space(-)
   Call: (276) [system] char_type(-, space)
^  Redo: (275) [user] is_like_space(-)
^  Unify: (275) [user] is_like_space(-)
   Call: (276) [system] char_type(-, cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _286716)
   Exit: (274) [system] get_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)='('
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _266218)
   Call: (274) [system] (-)='['
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _266218)
   Call: (274) [system] (-)='{'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _266218)
   Call: (274) [system] (-)='"'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _266218)
   Call: (274) [system] (-)=!
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _266218)
   Call: (274) [system] (-)='\''
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _266218)
   Call: (274) [system] (-)='`'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _266218)
   Call: (274) [system] (-)=end_of_file
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _266218)
^  Call: (274) [user] read_symbolic(')', (0x55aefe44e2f0), -, _266218)
^  Unify: (274) [user] read_symbolic(')', (0x55aefe44e2f0), -, _266218)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _305326)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _305326)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _307192)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), >)
^  Call: (276) [user] is_delimiter(>)
^  Unify: (276) [user] is_delimiter(>)
   Call: (277) [system] char_type(>, space)
^  Redo: (276) [user] is_delimiter(>)
   Call: (277) [system] arg(_312832, v('(', ')', end_of_file), >)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _305326)
   Call: (276) [system] ')'==(>)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _305326)
   Call: (276) [system] get_char((0x55aefe44e2f0), >)
   Exit: (276) [system] get_char((0x55aefe44e2f0), >)
   Call: (276) [system] (>)=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _305326)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _320198)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _320198)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _322064)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (277) [user] is_delimiter(' ')
^  Unify: (277) [user] is_delimiter(' ')
   Call: (278) [system] char_type(' ', space)
   Exit: (278) [system] char_type(' ', space)
^  Exit: (277) [user] is_delimiter(' ')
   Call: (277) [system] _320198=[]
   Exit: (277) [system] []=[]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (276) [system] _305326=[>]
   Exit: (276) [system] [>]=[>]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [>])
^  Call: (275) [user] classify_and_convert_charseq(-, [>], _266218)
^  Unify: (275) [user] classify_and_convert_charseq(-, [>], _266218)
^  Call: (277) [system] setup_call_cleanup('$notrace'(_336024, _336026), once(user:catch(read_from_chars([-, >], _266218), _336000, fail)), '$restore_trace'(_336024, _336026))
^  Unify: (277) [system] setup_call_cleanup(system:'$notrace'(_336024, _336026), system:once(user:catch(read_from_chars([-, >], _266218), _336000, fail)), system:'$restore_trace'(_336024, _336026))
^  Call: (278) [system] sig_atomic(system:'$notrace'(_336024, _336026))
^  Exit: (277) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([-, >], ->), _336000, fail)), system:'$restore_trace'(3, -1))
   Call: (276) [system] atomic(->)
   Exit: (276) [system] atomic(->)
^  Exit: (275) [user] classify_and_convert_charseq(-, [>], ->)
^  Exit: (274) [user] read_symbolic(')', (0x55aefe44e2f0), -, ->)
^  Exit: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), ->)
^  Call: (273) [user] read_list(')', (0x55aefe44e2f0), _344462)
^  Unify: (273) [user] read_list(')', (0x55aefe44e2f0), _344462)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _348176)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (275) [system] ' '=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(' ')
^  Unify: (275) [user] is_like_space(' ')
   Call: (276) [system] char_type(' ', 'white')
   Exit: (276) [system] char_type(' ', 'white')
^  Exit: (275) [user] is_like_space(' ')
   Call: (275) [system] get_char((0x55aefe44e2f0), _356834)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _360462)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _378170)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (274) [system] 'A'=')'
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _344462)
   Call: (274) [system] 'A'=end_of_file
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _344462)
^  Call: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _383748)
^  Unify: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _383748)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _387462)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] get_char((0x55aefe44e2f0), _404246)
   Exit: (275) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'='('
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _383748)
   Call: (275) [system] 'A'='['
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _383748)
   Call: (275) [system] 'A'='{'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _383748)
   Call: (275) [system] 'A'='"'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _383748)
   Call: (275) [system] 'A'=!
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _383748)
   Call: (275) [system] 'A'='\''
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _383748)
   Call: (275) [system] 'A'='`'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _383748)
   Call: (275) [system] 'A'=end_of_file
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _383748)
^  Call: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _383748)
^  Unify: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _383748)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _422856)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _422856)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _424722)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (277) [user] is_delimiter(t)
^  Unify: (277) [user] is_delimiter(t)
   Call: (278) [system] char_type(t, space)
^  Redo: (277) [user] is_delimiter(t)
   Call: (278) [system] arg(_430362, v('(', ')', end_of_file), t)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _422856)
   Call: (277) [system] ')'==t
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _422856)
   Call: (277) [system] get_char((0x55aefe44e2f0), t)
   Exit: (277) [system] get_char((0x55aefe44e2f0), t)
   Call: (277) [system] t=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _422856)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _437728)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _437728)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _439594)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (278) [user] is_delimiter(o)
^  Unify: (278) [user] is_delimiter(o)
   Call: (279) [system] char_type(o, space)
^  Redo: (278) [user] is_delimiter(o)
   Call: (279) [system] arg(_445234, v('(', ')', end_of_file), o)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _437728)
   Call: (278) [system] ')'==o
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _437728)
   Call: (278) [system] get_char((0x55aefe44e2f0), o)
   Exit: (278) [system] get_char((0x55aefe44e2f0), o)
   Call: (278) [system] o=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _437728)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _452600)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _452600)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _454466)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (279) [user] is_delimiter(m)
^  Unify: (279) [user] is_delimiter(m)
   Call: (280) [system] char_type(m, space)
^  Redo: (279) [user] is_delimiter(m)
   Call: (280) [system] arg(_460106, v('(', ')', end_of_file), m)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _452600)
   Call: (279) [system] ')'==m
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _452600)
   Call: (279) [system] get_char((0x55aefe44e2f0), m)
   Exit: (279) [system] get_char((0x55aefe44e2f0), m)
   Call: (279) [system] m=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _452600)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _467472)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _467472)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _469338)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (280) [user] is_delimiter(' ')
^  Unify: (280) [user] is_delimiter(' ')
   Call: (281) [system] char_type(' ', space)
   Exit: (281) [system] char_type(' ', space)
^  Exit: (280) [user] is_delimiter(' ')
   Call: (280) [system] _467472=[]
   Exit: (280) [system] []=[]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (279) [system] _452600=[m]
   Exit: (279) [system] [m]=[m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (278) [system] _437728=[o, m]
   Exit: (278) [system] [o, m]=[o, m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (277) [system] _422856=[t, o, m]
   Exit: (277) [system] [t, o, m]=[t, o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (276) [user] classify_and_convert_charseq('A', [t, o, m], _383748)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _383748)
^  Call: (278) [system] setup_call_cleanup('$notrace'(_488886, _488888), once(user:catch(read_from_chars(['A', t, o, m], _383748), _488862, fail)), '$restore_trace'(_488886, _488888))
^  Unify: (278) [system] setup_call_cleanup(system:'$notrace'(_488886, _488888), system:once(user:catch(read_from_chars(['A', t, o, m], _383748), _488862, fail)), system:'$restore_trace'(_488886, _488888))
^  Call: (279) [system] sig_atomic(system:'$notrace'(_488886, _488888))
^  Exit: (278) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _383748), _488862, fail)), system:'$restore_trace'(3, -1))
   Call: (277) [system] atomic(_383748)
^  Redo: (276) [user] classify_and_convert_charseq('A', [t, o, m], _383748)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _383748)
   Call: (277) [system] atom_chars(_383748, ['A', t, o, m])
   Exit: (277) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (276) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _500140)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _500140)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _503854)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (276) [system] ' '=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(' ')
^  Unify: (276) [user] is_like_space(' ')
   Call: (277) [system] char_type(' ', 'white')
   Exit: (277) [system] char_type(' ', 'white')
^  Exit: (276) [user] is_like_space(' ')
   Call: (276) [system] get_char((0x55aefe44e2f0), _512512)
   Exit: (276) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _516140)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (277) [system] 'A'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', 'white')
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', end_of_line)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', space)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _15928)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=')'
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _6008)
   Call: (275) [system] 'A'=end_of_file
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _6008)
^  Call: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _21506)
^  Unify: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _21506)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _25220)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (277) [system] 'A'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', 'white')
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', end_of_line)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', space)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] get_char((0x55aefe44e2f0), _42004)
   Exit: (276) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'='('
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _21506)
   Call: (276) [system] 'A'='['
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _21506)
   Call: (276) [system] 'A'='{'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _21506)
   Call: (276) [system] 'A'='"'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _21506)
   Call: (276) [system] 'A'=!
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _21506)
   Call: (276) [system] 'A'='\''
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _21506)
   Call: (276) [system] 'A'='`'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _21506)
   Call: (276) [system] 'A'=end_of_file
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _21506)
^  Call: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _21506)
^  Unify: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _21506)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _60614)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _60614)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _62480)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (278) [user] is_delimiter(t)
^  Unify: (278) [user] is_delimiter(t)
   Call: (279) [system] char_type(t, space)
^  Redo: (278) [user] is_delimiter(t)
   Call: (279) [system] arg(_68120, v('(', ')', end_of_file), t)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _60614)
   Call: (278) [system] ')'==t
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _60614)
   Call: (278) [system] get_char((0x55aefe44e2f0), t)
   Exit: (278) [system] get_char((0x55aefe44e2f0), t)
   Call: (278) [system] t=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _60614)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _75486)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _75486)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _77352)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (279) [user] is_delimiter(o)
^  Unify: (279) [user] is_delimiter(o)
   Call: (280) [system] char_type(o, space)
^  Redo: (279) [user] is_delimiter(o)
   Call: (280) [system] arg(_82992, v('(', ')', end_of_file), o)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _75486)
   Call: (279) [system] ')'==o
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _75486)
   Call: (279) [system] get_char((0x55aefe44e2f0), o)
   Exit: (279) [system] get_char((0x55aefe44e2f0), o)
   Call: (279) [system] o=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _75486)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _90358)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _90358)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _92224)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (280) [user] is_delimiter(m)
^  Unify: (280) [user] is_delimiter(m)
   Call: (281) [system] char_type(m, space)
^  Redo: (280) [user] is_delimiter(m)
   Call: (281) [system] arg(_97864, v('(', ')', end_of_file), m)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _90358)
   Call: (280) [system] ')'==m
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _90358)
   Call: (280) [system] get_char((0x55aefe44e2f0), m)
   Exit: (280) [system] get_char((0x55aefe44e2f0), m)
   Call: (280) [system] m=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _90358)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _105230)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _105230)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _107096)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (281) [user] is_delimiter(')')
^  Unify: (281) [user] is_delimiter(')')
   Call: (282) [system] char_type(')', space)
^  Redo: (281) [user] is_delimiter(')')
   Call: (282) [system] arg(_112736, v('(', ')', end_of_file), ')')
   Exit: (282) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (281) [user] is_delimiter(')')
   Call: (281) [system] _105230=[]
   Exit: (281) [system] []=[]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (280) [system] _90358=[m]
   Exit: (280) [system] [m]=[m]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (279) [system] _75486=[o, m]
   Exit: (279) [system] [o, m]=[o, m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (278) [system] _60614=[t, o, m]
   Exit: (278) [system] [t, o, m]=[t, o, m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (277) [user] classify_and_convert_charseq('A', [t, o, m], _21506)
^  Unify: (277) [user] classify_and_convert_charseq('A', [t, o, m], _21506)
^  Call: (279) [system] setup_call_cleanup('$notrace'(_128512, _128514), once(user:catch(read_from_chars(['A', t, o, m], _21506), _128488, fail)), '$restore_trace'(_128512, _128514))
^  Unify: (279) [system] setup_call_cleanup(system:'$notrace'(_128512, _128514), system:once(user:catch(read_from_chars(['A', t, o, m], _21506), _128488, fail)), system:'$restore_trace'(_128512, _128514))
^  Call: (280) [system] sig_atomic(system:'$notrace'(_128512, _128514))
^  Exit: (279) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _21506), _128488, fail)), system:'$restore_trace'(3, -1))
   Call: (278) [system] atomic(_21506)
^  Redo: (277) [user] classify_and_convert_charseq('A', [t, o, m], _21506)
^  Unify: (277) [user] classify_and_convert_charseq('A', [t, o, m], _21506)
   Call: (278) [system] atom_chars(_21506, ['A', t, o, m])
   Exit: (278) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (277) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (275) [user] read_list(')', (0x55aefe44e2f0), _139766)
^  Unify: (275) [user] read_list(')', (0x55aefe44e2f0), _139766)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _143480)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (277) [system] ')'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space(')')
^  Unify: (277) [user] is_like_space(')')
   Call: (278) [system] char_type(')', 'white')
^  Redo: (277) [user] is_like_space(')')
^  Unify: (277) [user] is_like_space(')')
   Call: (278) [system] char_type(')', end_of_line)
^  Redo: (277) [user] is_like_space(')')
^  Unify: (277) [user] is_like_space(')')
   Call: (278) [system] char_type(')', space)
^  Redo: (277) [user] is_like_space(')')
^  Unify: (277) [user] is_like_space(')')
   Call: (278) [system] char_type(')', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _160264)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (276) [system] ')'=')'
   Exit: (276) [system] ')'=')'
   Call: (276) [system] get_char((0x55aefe44e2f0), _164054)
   Exit: (276) [system] get_char((0x55aefe44e2f0), ')')
   Call: (276) [system] _139766=[]
   Exit: (276) [system] []=[]
^  Exit: (275) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (275) [system] _6008=['Atom']
   Exit: (275) [system] ['Atom']=['Atom']
^  Exit: (274) [user] read_list(')', (0x55aefe44e2f0), ['Atom'])
   Call: (274) [system] _6002=['Atom', 'Atom']
   Exit: (274) [system] ['Atom', 'Atom']=['Atom', 'Atom']
^  Exit: (273) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Atom'])
   Call: (273) [system] _5994=[->, 'Atom', 'Atom']
   Exit: (273) [system] [->, 'Atom', 'Atom']=[->, 'Atom', 'Atom']
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), [->, 'Atom', 'Atom'])
^  Exit: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), [->, 'Atom', 'Atom'])
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _177936)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _177936)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _181650)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (273) [system] ')'=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', 'white')
^  Redo: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', end_of_line)
^  Redo: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', space)
^  Redo: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _198434)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (272) [system] ')'=')'
   Exit: (272) [system] ')'=')'
   Call: (272) [system] get_char((0x55aefe44e2f0), _202224)
   Exit: (272) [system] get_char((0x55aefe44e2f0), ')')
   Call: (272) [system] _177936=[]
   Exit: (272) [system] []=[]
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (271) [system] _5990=[[->, 'Atom', 'Atom']]
   Exit: (271) [system] [[->, 'Atom', 'Atom']]=[[->, 'Atom', 'Atom']]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [[->, 'Atom', 'Atom']])
   Call: (270) [system] _5984=[id, [->, 'Atom', 'Atom']]
   Exit: (270) [system] [id, [->, 'Atom', 'Atom']]=[id, [->, 'Atom', 'Atom']]
^  Exit: (269) [user] read_list(')', (0x55aefe44e2f0), [id, [->, 'Atom', 'Atom']])
   Call: (269) [system] _5944=[:, id, [->, 'Atom', 'Atom']]
   Exit: (269) [system] [:, id, [->, 'Atom', 'Atom']]=[:, id, [->, 'Atom', 'Atom']]
^  Exit: (268) [user] read_list(')', (0x55aefe44e2f0), [:, id, [->, 'Atom', 'Atom']])
^  Exit: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), [:, id, [->, 'Atom', 'Atom']])
^  Exit: (266) [user] read_sexpr((0x55aefe44e2f0), [:, id, [->, 'Atom', 'Atom']])
^  Call: (266) [user] assertz(metta_file_comment(20, 0, 583, [:, id, [->, 'Atom', 'Atom']], '$stream_position'(583, 20, 0, 583)))
^  Exit: (266) [user] assertz(metta_file_comment(20, 0, 583, [:, id, [->, 'Atom', 'Atom']], '$stream_position'(583, 20, 0, 583)))
^  Exit: (264) [system] once(user:(read_position((0x55aefe44e2f0), 20, 0, 583, '$stream_position'(583, 20, 0, 583)), read_sexpr((0x55aefe44e2f0), [:, id, [->, 'Atom', 'Atom']]), assertz(metta_file_comment(20, 0, 583, [:, id, [->, 'Atom', 'Atom']], '$stream_position'(583, 20, 0, 583)))))
   Call: (264) [system] fail
^  Redo: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Unify: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Call: (264) [user] retract(metta_file_comment(_222598, _222600, _222602, _222604, _222606))
^  Exit: (264) [user] retract(metta_file_comment(20, 0, 583, [:, id, [->, 'Atom', 'Atom']], '$stream_position'(583, 20, 0, 583)))
^  Call: (264) [user] trly(untyped_to_metta, [:, id, [->, 'Atom', 'Atom']], _5908)
^  Unify: (264) [user] trly(untyped_to_metta, [:, id, [->, 'Atom', 'Atom']], _5908)
^  Call: (265) [user] once(call(untyped_to_metta, [:, id, [->, 'Atom', 'Atom']], _226384))
^  Unify: (265) [system] once(user:call(untyped_to_metta, [:, id, [->, 'Atom', 'Atom']], _226384))
^  Call: (266) [user] call(untyped_to_metta, [:, id, [->, 'Atom', 'Atom']], _226384)
^  Unify: (266) [system] call(user:untyped_to_metta, [:, id, [->, 'Atom', 'Atom']], _226384)
^  Call: (267) [user] untyped_to_metta([:, id, [->, 'Atom', 'Atom']], _226384)
^  Unify: (267) [user] untyped_to_metta([:, id, [->, 'Atom', 'Atom']], _226384)
^  Call: (268) [user] must_det_ll(trly(mfix_vars1, [:, id, [->, 'Atom', 'Atom']], _231996))
^  Unify: (268) [user] must_det_ll(user:trly(mfix_vars1, [:, id, [->, 'Atom', 'Atom']], _231996))
^  Call: (269) [user] once(user:trly(mfix_vars1, [:, id, [->, 'Atom', 'Atom']], _231996))
^  Unify: (269) [system] once(user:trly(mfix_vars1, [:, id, [->, 'Atom', 'Atom']], _231996))
^  Call: (270) [user] trly(mfix_vars1, [:, id, [->, 'Atom', 'Atom']], _231996)
^  Unify: (270) [user] trly(mfix_vars1, [:, id, [->, 'Atom', 'Atom']], _231996)
^  Call: (271) [user] once(call(mfix_vars1, [:, id, [->, 'Atom', 'Atom']], _237582))
^  Unify: (271) [system] once(user:call(mfix_vars1, [:, id, [->, 'Atom', 'Atom']], _237582))
^  Call: (272) [user] call(mfix_vars1, [:, id, [->, 'Atom', 'Atom']], _237582)
^  Unify: (272) [system] call(user:mfix_vars1, [:, id, [->, 'Atom', 'Atom']], _237582)
^  Call: (273) [user] mfix_vars1([:, id, [->, 'Atom', 'Atom']], _237582)
^  Unify: (273) [user] mfix_vars1([:, id, [->, 'Atom', 'Atom']], _237582)
   Call: (274) [system] var([:, id, [->, 'Atom', 'Atom']])
^  Redo: (273) [user] mfix_vars1([:, id, [->, 'Atom', 'Atom']], _237582)
^  Unify: (273) [user] mfix_vars1([:, id, [->, 'Atom', 'Atom']], '$VAR'(_245042))
   Call: (274) [system] atom([:, id, [->, 'Atom', 'Atom']])
^  Redo: (273) [user] mfix_vars1([:, id, [->, 'Atom', 'Atom']], _237582)
^  Unify: (273) [user] mfix_vars1([:, id, [->, 'Atom', 'Atom']], _237582)
   Call: (274) [system] [:, id, [->, 'Atom', 'Atom']]==true
^  Redo: (273) [user] mfix_vars1([:, id, [->, 'Atom', 'Atom']], _237582)
^  Unify: (273) [user] mfix_vars1([:, id, [->, 'Atom', 'Atom']], _237582)
   Call: (274) [system] [:, id, [->, 'Atom', 'Atom']]==false
^  Redo: (273) [user] mfix_vars1([:, id, [->, 'Atom', 'Atom']], _237582)
^  Unify: (273) [user] mfix_vars1([:, id, [->, 'Atom', 'Atom']], _237582)
   Call: (274) [system] (:)=='['
^  Redo: (273) [user] mfix_vars1([:, id, [->, 'Atom', 'Atom']], _237582)
^  Unify: (273) [user] mfix_vars1([:, id, [->, 'Atom', 'Atom']], _237582)
   Call: (274) [system] (:)=='{'
^  Redo: (273) [user] mfix_vars1([:, id, [->, 'Atom', 'Atom']], _237582)
^  Unify: (273) [user] mfix_vars1([:, id, [->, 'Atom', 'Atom']], _237582)
   Call: (274) [system] is_list([id, [->, 'Atom', 'Atom']])
   Exit: (274) [system] is_list([id, [->, 'Atom', 'Atom']])
   Call: (274) [lists] lists:last([id, [->, 'Atom', 'Atom']], _261736)
   Unify: (274) [lists] lists:last([id, [->, 'Atom', 'Atom']], _261736)
   Call: (275) [lists] lists:last_([[->, 'Atom', 'Atom']], id, _261736)
   Unify: (275) [lists] lists:last_([[->, 'Atom', 'Atom']], id, _261736)
   Call: (276) [lists] lists:last_([], [->, 'Atom', 'Atom'], _261736)
   Unify: (276) [lists] lists:last_([], [->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
   Exit: (276) [lists] lists:last_([], [->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
   Exit: (275) [lists] lists:last_([[->, 'Atom', 'Atom']], id, [->, 'Atom', 'Atom'])
   Exit: (274) [lists] lists:last([id, [->, 'Atom', 'Atom']], [->, 'Atom', 'Atom'])
   Call: (274) [system] [->, 'Atom', 'Atom']=='}'
^  Redo: (273) [user] mfix_vars1([:, id, [->, 'Atom', 'Atom']], _237582)
^  Unify: (273) [user] mfix_vars1([:, id, [->, 'Atom', 'Atom']], _237582)
   Call: (274) [system] [:, id, [->, 'Atom', 'Atom']]==[_272900, _272906]
^  Redo: (273) [user] mfix_vars1([:, id, [->, 'Atom', 'Atom']], _237582)
^  Unify: (273) [user] mfix_vars1([:, id, [->, 'Atom', 'Atom']], _237582)
   Call: (274) [system] fail
^  Redo: (273) [user] mfix_vars1([:, id, [->, 'Atom', 'Atom']], _237582)
^  Unify: (273) [user] mfix_vars1([:, id, [->, 'Atom', 'Atom']], _237582)
   Call: (274) [system] is_list([:, id, [->, 'Atom', 'Atom']])
   Exit: (274) [system] is_list([:, id, [->, 'Atom', 'Atom']])
^  Call: (274) [user] apply:maplist(mfix_vars1, [:, id, [->, 'Atom', 'Atom']], _237582)
^  Unify: (274) [apply] apply:maplist(user:mfix_vars1, [:, id, [->, 'Atom', 'Atom']], _237582)
   Call: (275) [apply] apply:maplist_([:, id, [->, 'Atom', 'Atom']], _237582, user:mfix_vars1)
   Unify: (275) [apply] apply:maplist_([:, id, [->, 'Atom', 'Atom']], [_283130|_283132], user:mfix_vars1)
^  Call: (276) [user] mfix_vars1(:, _283130)
^  Unify: (276) [user] mfix_vars1(:, _283130)
   Call: (277) [system] var(:)
^  Redo: (276) [user] mfix_vars1(:, _283130)
^  Unify: (276) [user] mfix_vars1(:, '$VAR'(_287776))
   Call: (277) [system] atom(:)
   Exit: (277) [system] atom(:)
^  Call: (277) [user] symbol_concat($, _290554, :)
^  Unify: (277) [user] symbol_concat($, _290554, :)
   Call: (278) [system] atom_concat($, _290554, :)
   Fail: (278) [system] atom_concat($, _290554, :)
^  Fail: (277) [user] symbol_concat($, _290554, :)
^  Redo: (276) [user] mfix_vars1(:, _283130)
^  Unify: (276) [user] mfix_vars1(:, _283130)
   Call: (277) [system] (:)==true
^  Redo: (276) [user] mfix_vars1(:, _283130)
^  Unify: (276) [user] mfix_vars1(:, _283130)
   Call: (277) [system] (:)==false
^  Redo: (276) [user] mfix_vars1(:, _283130)
^  Unify: (276) [user] mfix_vars1(:, _283130)
   Call: (277) [system] (:)==[_302642, _302648]
^  Redo: (276) [user] mfix_vars1(:, _283130)
^  Unify: (276) [user] mfix_vars1(:, _283130)
   Call: (277) [system] is_list(:)
^  Redo: (276) [user] mfix_vars1(:, _283130)
^  Unify: (276) [user] mfix_vars1(:, _283130)
   Call: (277) [system] string(:)
^  Redo: (276) [user] mfix_vars1(:, _283130)
^  Unify: (276) [user] mfix_vars1(:, _283130)
   Call: (277) [system] compound(:)
^  Redo: (276) [user] mfix_vars1(:, _283130)
^  Unify: (276) [user] mfix_vars1(:, _283130)
^  Call: (277) [user] symbol(:)
^  Unify: (277) [user] symbol(:)
   Call: (278) [system] atom(:)
   Exit: (278) [system] atom(:)
^  Exit: (277) [user] symbol(:)
^  Unify: (276) [user] mfix_vars1(:, :)
^  Exit: (276) [user] mfix_vars1(:, :)
   Call: (276) [apply] apply:maplist_([id, [->, 'Atom', 'Atom']], _283132, user:mfix_vars1)
   Unify: (276) [apply] apply:maplist_([id, [->, 'Atom', 'Atom']], [_321186|_321188], user:mfix_vars1)
^  Call: (277) [user] mfix_vars1(id, _321186)
^  Unify: (277) [user] mfix_vars1(id, _321186)
   Call: (278) [system] var(id)
^  Redo: (277) [user] mfix_vars1(id, _321186)
^  Unify: (277) [user] mfix_vars1(id, '$VAR'(_325832))
   Call: (278) [system] atom(id)
   Exit: (278) [system] atom(id)
^  Call: (278) [user] symbol_concat($, _328610, id)
^  Unify: (278) [user] symbol_concat($, _328610, id)
   Call: (279) [system] atom_concat($, _328610, id)
   Fail: (279) [system] atom_concat($, _328610, id)
^  Fail: (278) [user] symbol_concat($, _328610, id)
^  Redo: (277) [user] mfix_vars1(id, _321186)
^  Unify: (277) [user] mfix_vars1(id, _321186)
   Call: (278) [system] id==true
^  Redo: (277) [user] mfix_vars1(id, _321186)
^  Unify: (277) [user] mfix_vars1(id, _321186)
   Call: (278) [system] id==false
^  Redo: (277) [user] mfix_vars1(id, _321186)
^  Unify: (277) [user] mfix_vars1(id, _321186)
   Call: (278) [system] id==[_340698, _340704]
^  Redo: (277) [user] mfix_vars1(id, _321186)
^  Unify: (277) [user] mfix_vars1(id, _321186)
   Call: (278) [system] is_list(id)
^  Redo: (277) [user] mfix_vars1(id, _321186)
^  Unify: (277) [user] mfix_vars1(id, _321186)
   Call: (278) [system] string(id)
^  Redo: (277) [user] mfix_vars1(id, _321186)
^  Unify: (277) [user] mfix_vars1(id, _321186)
   Call: (278) [system] compound(id)
^  Redo: (277) [user] mfix_vars1(id, _321186)
^  Unify: (277) [user] mfix_vars1(id, _321186)
^  Call: (278) [user] symbol(id)
^  Unify: (278) [user] symbol(id)
   Call: (279) [system] atom(id)
   Exit: (279) [system] atom(id)
^  Exit: (278) [user] symbol(id)
^  Unify: (277) [user] mfix_vars1(id, id)
^  Exit: (277) [user] mfix_vars1(id, id)
   Call: (277) [apply] apply:maplist_([[->, 'Atom', 'Atom']], _321188, user:mfix_vars1)
   Unify: (277) [apply] apply:maplist_([[->, 'Atom', 'Atom']], [_359242|_359244], user:mfix_vars1)
^  Call: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _359242)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _359242)
   Call: (279) [system] var([->, 'Atom', 'Atom'])
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _359242)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], '$VAR'(_363888))
   Call: (279) [system] atom([->, 'Atom', 'Atom'])
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _359242)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _359242)
   Call: (279) [system] [->, 'Atom', 'Atom']==true
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _359242)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _359242)
   Call: (279) [system] [->, 'Atom', 'Atom']==false
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _359242)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _359242)
   Call: (279) [system] (->)=='['
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _359242)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _359242)
   Call: (279) [system] (->)=='{'
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _359242)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _359242)
   Call: (279) [system] is_list(['Atom', 'Atom'])
   Exit: (279) [system] is_list(['Atom', 'Atom'])
   Call: (279) [lists] lists:last(['Atom', 'Atom'], _380582)
   Unify: (279) [lists] lists:last(['Atom', 'Atom'], _380582)
   Call: (280) [lists] lists:last_(['Atom'], 'Atom', _380582)
   Unify: (280) [lists] lists:last_(['Atom'], 'Atom', _380582)
   Call: (281) [lists] lists:last_([], 'Atom', _380582)
   Unify: (281) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (281) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (280) [lists] lists:last_(['Atom'], 'Atom', 'Atom')
   Exit: (279) [lists] lists:last(['Atom', 'Atom'], 'Atom')
   Call: (279) [system] 'Atom'=='}'
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _359242)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _359242)
   Call: (279) [system] [->, 'Atom', 'Atom']==[_391746, _391752]
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _359242)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _359242)
   Call: (279) [system] fail
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _359242)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], _359242)
   Call: (279) [system] is_list([->, 'Atom', 'Atom'])
   Exit: (279) [system] is_list([->, 'Atom', 'Atom'])
^  Call: (279) [user] apply:maplist(mfix_vars1, [->, 'Atom', 'Atom'], _359242)
^  Unify: (279) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Atom'], _359242)
   Call: (280) [apply] apply:maplist_([->, 'Atom', 'Atom'], _359242, user:mfix_vars1)
   Unify: (280) [apply] apply:maplist_([->, 'Atom', 'Atom'], [_401976|_401978], user:mfix_vars1)
^  Call: (281) [user] mfix_vars1(->, _401976)
^  Unify: (281) [user] mfix_vars1(->, _401976)
   Call: (282) [system] var(->)
^  Redo: (281) [user] mfix_vars1(->, _401976)
^  Unify: (281) [user] mfix_vars1(->, '$VAR'(_406622))
   Call: (282) [system] atom(->)
   Exit: (282) [system] atom(->)
^  Call: (282) [user] symbol_concat($, _409400, ->)
^  Unify: (282) [user] symbol_concat($, _409400, ->)
   Call: (283) [system] atom_concat($, _409400, ->)
   Fail: (283) [system] atom_concat($, _409400, ->)
^  Fail: (282) [user] symbol_concat($, _409400, ->)
^  Redo: (281) [user] mfix_vars1(->, _401976)
^  Unify: (281) [user] mfix_vars1(->, _401976)
   Call: (282) [system] (->)==true
^  Redo: (281) [user] mfix_vars1(->, _401976)
^  Unify: (281) [user] mfix_vars1(->, _401976)
   Call: (282) [system] (->)==false
^  Redo: (281) [user] mfix_vars1(->, _401976)
^  Unify: (281) [user] mfix_vars1(->, _401976)
   Call: (282) [system] (->)==[_421488, _421494]
^  Redo: (281) [user] mfix_vars1(->, _401976)
^  Unify: (281) [user] mfix_vars1(->, _401976)
   Call: (282) [system] is_list(->)
^  Redo: (281) [user] mfix_vars1(->, _401976)
^  Unify: (281) [user] mfix_vars1(->, _401976)
   Call: (282) [system] string(->)
^  Redo: (281) [user] mfix_vars1(->, _401976)
^  Unify: (281) [user] mfix_vars1(->, _401976)
   Call: (282) [system] compound(->)
^  Redo: (281) [user] mfix_vars1(->, _401976)
^  Unify: (281) [user] mfix_vars1(->, _401976)
^  Call: (282) [user] symbol(->)
^  Unify: (282) [user] symbol(->)
   Call: (283) [system] atom(->)
   Exit: (283) [system] atom(->)
^  Exit: (282) [user] symbol(->)
^  Unify: (281) [user] mfix_vars1(->, ->)
^  Exit: (281) [user] mfix_vars1(->, ->)
   Call: (281) [apply] apply:maplist_(['Atom', 'Atom'], _401978, user:mfix_vars1)
   Unify: (281) [apply] apply:maplist_(['Atom', 'Atom'], [_440032|_440034], user:mfix_vars1)
^  Call: (282) [user] mfix_vars1('Atom', _440032)
^  Unify: (282) [user] mfix_vars1('Atom', _440032)
   Call: (283) [system] var('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _440032)
^  Unify: (282) [user] mfix_vars1('Atom', '$VAR'(_444678))
   Call: (283) [system] atom('Atom')
   Exit: (283) [system] atom('Atom')
^  Call: (283) [user] symbol_concat($, _447456, 'Atom')
^  Unify: (283) [user] symbol_concat($, _447456, 'Atom')
   Call: (284) [system] atom_concat($, _447456, 'Atom')
   Fail: (284) [system] atom_concat($, _447456, 'Atom')
^  Fail: (283) [user] symbol_concat($, _447456, 'Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _440032)
^  Unify: (282) [user] mfix_vars1('Atom', _440032)
   Call: (283) [system] 'Atom'==true
^  Redo: (282) [user] mfix_vars1('Atom', _440032)
^  Unify: (282) [user] mfix_vars1('Atom', _440032)
   Call: (283) [system] 'Atom'==false
^  Redo: (282) [user] mfix_vars1('Atom', _440032)
^  Unify: (282) [user] mfix_vars1('Atom', _440032)
   Call: (283) [system] 'Atom'==[_459544, _459550]
^  Redo: (282) [user] mfix_vars1('Atom', _440032)
^  Unify: (282) [user] mfix_vars1('Atom', _440032)
   Call: (283) [system] is_list('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _440032)
^  Unify: (282) [user] mfix_vars1('Atom', _440032)
   Call: (283) [system] string('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _440032)
^  Unify: (282) [user] mfix_vars1('Atom', _440032)
   Call: (283) [system] compound('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _440032)
^  Unify: (282) [user] mfix_vars1('Atom', _440032)
^  Call: (283) [user] symbol('Atom')
^  Unify: (283) [user] symbol('Atom')
   Call: (284) [system] atom('Atom')
   Exit: (284) [system] atom('Atom')
^  Exit: (283) [user] symbol('Atom')
^  Unify: (282) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (282) [user] mfix_vars1('Atom', 'Atom')
   Call: (282) [apply] apply:maplist_(['Atom'], _440034, user:mfix_vars1)
   Unify: (282) [apply] apply:maplist_(['Atom'], [_478088|_478090], user:mfix_vars1)
^  Call: (283) [user] mfix_vars1('Atom', _478088)
^  Unify: (283) [user] mfix_vars1('Atom', _478088)
   Call: (284) [system] var('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _478088)
^  Unify: (283) [user] mfix_vars1('Atom', '$VAR'(_482734))
   Call: (284) [system] atom('Atom')
   Exit: (284) [system] atom('Atom')
^  Call: (284) [user] symbol_concat($, _485512, 'Atom')
^  Unify: (284) [user] symbol_concat($, _485512, 'Atom')
   Call: (285) [system] atom_concat($, _485512, 'Atom')
   Fail: (285) [system] atom_concat($, _485512, 'Atom')
^  Fail: (284) [user] symbol_concat($, _485512, 'Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _478088)
^  Unify: (283) [user] mfix_vars1('Atom', _478088)
   Call: (284) [system] 'Atom'==true
^  Redo: (283) [user] mfix_vars1('Atom', _478088)
^  Unify: (283) [user] mfix_vars1('Atom', _478088)
   Call: (284) [system] 'Atom'==false
^  Redo: (283) [user] mfix_vars1('Atom', _478088)
^  Unify: (283) [user] mfix_vars1('Atom', _478088)
   Call: (284) [system] 'Atom'==[_497600, _497606]
^  Redo: (283) [user] mfix_vars1('Atom', _478088)
^  Unify: (283) [user] mfix_vars1('Atom', _478088)
   Call: (284) [system] is_list('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _478088)
^  Unify: (283) [user] mfix_vars1('Atom', _478088)
   Call: (284) [system] string('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _478088)
^  Unify: (283) [user] mfix_vars1('Atom', _478088)
   Call: (284) [system] compound('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _478088)
^  Unify: (283) [user] mfix_vars1('Atom', _478088)
^  Call: (284) [user] symbol('Atom')
^  Unify: (284) [user] symbol('Atom')
   Call: (285) [system] atom('Atom')
   Exit: (285) [system] atom('Atom')
^  Exit: (284) [user] symbol('Atom')
^  Unify: (283) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (283) [user] mfix_vars1('Atom', 'Atom')
   Call: (283) [apply] apply:maplist_([], _478090, user:mfix_vars1)
   Unify: (283) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (283) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (282) [apply] apply:maplist_(['Atom'], ['Atom'], user:mfix_vars1)
   Exit: (281) [apply] apply:maplist_(['Atom', 'Atom'], ['Atom', 'Atom'], user:mfix_vars1)
   Exit: (280) [apply] apply:maplist_([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'], user:mfix_vars1)
^  Exit: (279) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
^  Exit: (278) [user] mfix_vars1([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'])
   Call: (278) [apply] apply:maplist_([], _359244, user:mfix_vars1)
   Unify: (278) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (278) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (277) [apply] apply:maplist_([[->, 'Atom', 'Atom']], [[->, 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (276) [apply] apply:maplist_([id, [->, 'Atom', 'Atom']], [id, [->, 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (275) [apply] apply:maplist_([:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']], user:mfix_vars1)
^  Exit: (274) [apply] apply:maplist(user:mfix_vars1, [:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']])
^  Exit: (273) [user] mfix_vars1([:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']])
^  Exit: (272) [system] call(user:mfix_vars1, [:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']])
^  Exit: (271) [system] once(user:call(mfix_vars1, [:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']]))
   Call: (271) [system] [:, id, [->, 'Atom', 'Atom']]\=@=[:, id, [->, 'Atom', 'Atom']]
^  Redo: (270) [user] trly(mfix_vars1, [:, id, [->, 'Atom', 'Atom']], _5978)
^  Unify: (270) [user] trly(mfix_vars1, [:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']])
^  Exit: (270) [user] trly(mfix_vars1, [:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']])
^  Exit: (269) [system] once(user:trly(mfix_vars1, [:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']]))
^  Exit: (268) [user] must_det_ll(user:trly(mfix_vars1, [:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']]))
^  Call: (268) [user] must_det_ll(trly(cons_to_c, [:, id, [->, 'Atom', 'Atom']], _19702))
^  Unify: (268) [user] must_det_ll(user:trly(cons_to_c, [:, id, [->, 'Atom', 'Atom']], _19702))
^  Call: (269) [user] once(user:trly(cons_to_c, [:, id, [->, 'Atom', 'Atom']], _19702))
^  Unify: (269) [system] once(user:trly(cons_to_c, [:, id, [->, 'Atom', 'Atom']], _19702))
^  Call: (270) [user] trly(cons_to_c, [:, id, [->, 'Atom', 'Atom']], _19702)
^  Unify: (270) [user] trly(cons_to_c, [:, id, [->, 'Atom', 'Atom']], _19702)
^  Call: (271) [user] once(call(cons_to_c, [:, id, [->, 'Atom', 'Atom']], _25288))
^  Unify: (271) [system] once(user:call(cons_to_c, [:, id, [->, 'Atom', 'Atom']], _25288))
^  Call: (272) [user] call(cons_to_c, [:, id, [->, 'Atom', 'Atom']], _25288)
^  Unify: (272) [system] call(user:cons_to_c, [:, id, [->, 'Atom', 'Atom']], _25288)
^  Call: (273) [user] cons_to_c([:, id, [->, 'Atom', 'Atom']], _25288)
^  Unify: (273) [user] cons_to_c([:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']])
^  Call: (274) [user] no_cons_reduce
^  Unify: (274) [user] no_cons_reduce
^  Exit: (274) [user] no_cons_reduce
^  Exit: (273) [user] cons_to_c([:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']])
^  Exit: (272) [system] call(user:cons_to_c, [:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']])
^  Exit: (271) [system] once(user:call(cons_to_c, [:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']]))
   Call: (271) [system] [:, id, [->, 'Atom', 'Atom']]\=@=[:, id, [->, 'Atom', 'Atom']]
^  Redo: (270) [user] trly(cons_to_c, [:, id, [->, 'Atom', 'Atom']], _19702)
^  Unify: (270) [user] trly(cons_to_c, [:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']])
^  Exit: (270) [user] trly(cons_to_c, [:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']])
^  Exit: (269) [system] once(user:trly(cons_to_c, [:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']]))
^  Exit: (268) [user] must_det_ll(user:trly(cons_to_c, [:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']]))
^  Call: (268) [user] must_det_ll(trly(cons_to_l, [:, id, [->, 'Atom', 'Atom']], _5958))
^  Unify: (268) [user] must_det_ll(user:trly(cons_to_l, [:, id, [->, 'Atom', 'Atom']], _5958))
^  Call: (269) [user] once(user:trly(cons_to_l, [:, id, [->, 'Atom', 'Atom']], _5958))
^  Unify: (269) [system] once(user:trly(cons_to_l, [:, id, [->, 'Atom', 'Atom']], _5958))
^  Call: (270) [user] trly(cons_to_l, [:, id, [->, 'Atom', 'Atom']], _5958)
^  Unify: (270) [user] trly(cons_to_l, [:, id, [->, 'Atom', 'Atom']], _5958)
^  Call: (271) [user] once(call(cons_to_l, [:, id, [->, 'Atom', 'Atom']], _47608))
^  Unify: (271) [system] once(user:call(cons_to_l, [:, id, [->, 'Atom', 'Atom']], _47608))
^  Call: (272) [user] call(cons_to_l, [:, id, [->, 'Atom', 'Atom']], _47608)
^  Unify: (272) [system] call(user:cons_to_l, [:, id, [->, 'Atom', 'Atom']], _47608)
^  Call: (273) [user] cons_to_l([:, id, [->, 'Atom', 'Atom']], _47608)
^  Unify: (273) [user] cons_to_l([:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']])
^  Call: (274) [user] no_cons_reduce
^  Unify: (274) [user] no_cons_reduce
^  Exit: (274) [user] no_cons_reduce
^  Exit: (273) [user] cons_to_l([:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']])
^  Exit: (272) [system] call(user:cons_to_l, [:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']])
^  Exit: (271) [system] once(user:call(cons_to_l, [:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']]))
   Call: (271) [system] [:, id, [->, 'Atom', 'Atom']]\=@=[:, id, [->, 'Atom', 'Atom']]
^  Redo: (270) [user] trly(cons_to_l, [:, id, [->, 'Atom', 'Atom']], _5958)
^  Unify: (270) [user] trly(cons_to_l, [:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']])
^  Exit: (270) [user] trly(cons_to_l, [:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']])
^  Exit: (269) [system] once(user:trly(cons_to_l, [:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']]))
^  Exit: (268) [user] must_det_ll(user:trly(cons_to_l, [:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']]))
^  Exit: (267) [user] untyped_to_metta([:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']])
^  Exit: (266) [system] call(user:untyped_to_metta, [:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']])
^  Exit: (265) [system] once(user:call(untyped_to_metta, [:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']]))
   Call: (265) [system] [:, id, [->, 'Atom', 'Atom']]\=@=[:, id, [->, 'Atom', 'Atom']]
^  Redo: (264) [user] trly(untyped_to_metta, [:, id, [->, 'Atom', 'Atom']], _5908)
^  Unify: (264) [user] trly(untyped_to_metta, [:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']])
^  Exit: (264) [user] trly(untyped_to_metta, [:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']])
^  Exit: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, id, [->, 'Atom', 'Atom']])
   Call: (263) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, id, [->, 'Atom', 'Atom']])))
   Unify: (263) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, id, [->, 'Atom', 'Atom']])))
   Exit: (263) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, id, [->, 'Atom', 'Atom']])))
^  Exit: (262) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, id, [->, 'Atom', 'Atom']])
^  Exit: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, id, [->, 'Atom', 'Atom']])
^  Exit: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, id, [->, 'Atom', 'Atom']])
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, id, [->, 'Atom', 'Atom']])
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, id, [->, 'Atom', 'Atom']])))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, id, [->, 'Atom', 'Atom']])))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, id, [->, 'Atom', 'Atom']])))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, id, [->, 'Atom', 'Atom']])
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), [:, id, [->, 'Atom', 'Atom']])
^  Call: (257) [user] subst_vars([:, id, [->, 'Atom', 'Atom']], _82844, [], _82846)
^  Unify: (257) [user] subst_vars([:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']], [], [])
   Call: (258) [system] var([:, id, [->, 'Atom', 'Atom']])
^  Redo: (257) [user] subst_vars([:, id, [->, 'Atom', 'Atom']], _82844, [], _82846)
^  Unify: (257) [user] subst_vars([:, id, [->, 'Atom', 'Atom']], [_86582|_86584], [], _82846)
^  Call: (258) [user] subst_vars(:, _86582, [], _87522)
^  Unify: (258) [user] subst_vars(:, :, [], [])
   Call: (259) [system] var(:)
^  Redo: (258) [user] subst_vars(:, _86582, [], _87522)
^  Unify: (258) [user] subst_vars(:, _86582, [], _87522)
   Call: (259) [system] atom(:)
   Exit: (259) [system] atom(:)
^  Call: (259) [user] symbol_concat($, _94040, :)
^  Unify: (259) [user] symbol_concat($, _94040, :)
   Call: (260) [system] atom_concat($, _94040, :)
   Fail: (260) [system] atom_concat($, _94040, :)
^  Fail: (259) [user] symbol_concat($, _94040, :)
^  Redo: (258) [user] subst_vars(:, _86582, [], _87522)
^  Unify: (258) [user] subst_vars(:, _86582, [], _87522)
   Call: (259) [system] compound(:)
^  Redo: (258) [user] subst_vars(:, _86582, [], _87522)
^  Unify: (258) [user] subst_vars(:, :, [], [])
^  Exit: (258) [user] subst_vars(:, :, [], [])
^  Call: (258) [user] subst_vars([id, [->, 'Atom', 'Atom']], _86584, [], _82846)
^  Unify: (258) [user] subst_vars([id, [->, 'Atom', 'Atom']], [id, [->, 'Atom', 'Atom']], [], [])
   Call: (259) [system] var([id, [->, 'Atom', 'Atom']])
^  Redo: (258) [user] subst_vars([id, [->, 'Atom', 'Atom']], _86584, [], _82846)
^  Unify: (258) [user] subst_vars([id, [->, 'Atom', 'Atom']], [_108040|_108042], [], _82846)
^  Call: (259) [user] subst_vars(id, _108040, [], _108980)
^  Unify: (259) [user] subst_vars(id, id, [], [])
   Call: (260) [system] var(id)
^  Redo: (259) [user] subst_vars(id, _108040, [], _108980)
^  Unify: (259) [user] subst_vars(id, _108040, [], _108980)
   Call: (260) [system] atom(id)
   Exit: (260) [system] atom(id)
^  Call: (260) [user] symbol_concat($, _115498, id)
^  Unify: (260) [user] symbol_concat($, _115498, id)
   Call: (261) [system] atom_concat($, _115498, id)
   Fail: (261) [system] atom_concat($, _115498, id)
^  Fail: (260) [user] symbol_concat($, _115498, id)
^  Redo: (259) [user] subst_vars(id, _108040, [], _108980)
^  Unify: (259) [user] subst_vars(id, _108040, [], _108980)
   Call: (260) [system] compound(id)
^  Redo: (259) [user] subst_vars(id, _108040, [], _108980)
^  Unify: (259) [user] subst_vars(id, id, [], [])
^  Exit: (259) [user] subst_vars(id, id, [], [])
^  Call: (259) [user] subst_vars([[->, 'Atom', 'Atom']], _108042, [], _82846)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Atom']], [[->, 'Atom', 'Atom']], [], [])
   Call: (260) [system] var([[->, 'Atom', 'Atom']])
^  Redo: (259) [user] subst_vars([[->, 'Atom', 'Atom']], _108042, [], _82846)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Atom']], [_129498|_129500], [], _82846)
^  Call: (260) [user] subst_vars([->, 'Atom', 'Atom'], _129498, [], _130438)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'], [], [])
   Call: (261) [system] var([->, 'Atom', 'Atom'])
^  Redo: (260) [user] subst_vars([->, 'Atom', 'Atom'], _129498, [], _130438)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Atom'], [_134174|_134176], [], _130438)
^  Call: (261) [user] subst_vars(->, _134174, [], _135114)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
   Call: (262) [system] var(->)
^  Redo: (261) [user] subst_vars(->, _134174, [], _135114)
^  Unify: (261) [user] subst_vars(->, _134174, [], _135114)
   Call: (262) [system] atom(->)
   Exit: (262) [system] atom(->)
^  Call: (262) [user] symbol_concat($, _141632, ->)
^  Unify: (262) [user] symbol_concat($, _141632, ->)
   Call: (263) [system] atom_concat($, _141632, ->)
   Fail: (263) [system] atom_concat($, _141632, ->)
^  Fail: (262) [user] symbol_concat($, _141632, ->)
^  Redo: (261) [user] subst_vars(->, _134174, [], _135114)
^  Unify: (261) [user] subst_vars(->, _134174, [], _135114)
   Call: (262) [system] compound(->)
^  Redo: (261) [user] subst_vars(->, _134174, [], _135114)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
^  Exit: (261) [user] subst_vars(->, ->, [], [])
^  Call: (261) [user] subst_vars(['Atom', 'Atom'], _134176, [], _130438)
^  Unify: (261) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
   Call: (262) [system] var(['Atom', 'Atom'])
^  Redo: (261) [user] subst_vars(['Atom', 'Atom'], _134176, [], _130438)
^  Unify: (261) [user] subst_vars(['Atom', 'Atom'], [_155632|_155634], [], _130438)
^  Call: (262) [user] subst_vars('Atom', _155632, [], _156572)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (263) [system] var('Atom')
^  Redo: (262) [user] subst_vars('Atom', _155632, [], _156572)
^  Unify: (262) [user] subst_vars('Atom', _155632, [], _156572)
   Call: (263) [system] atom('Atom')
   Exit: (263) [system] atom('Atom')
^  Call: (263) [user] symbol_concat($, _163090, 'Atom')
^  Unify: (263) [user] symbol_concat($, _163090, 'Atom')
   Call: (264) [system] atom_concat($, _163090, 'Atom')
   Fail: (264) [system] atom_concat($, _163090, 'Atom')
^  Fail: (263) [user] symbol_concat($, _163090, 'Atom')
^  Redo: (262) [user] subst_vars('Atom', _155632, [], _156572)
^  Unify: (262) [user] subst_vars('Atom', _155632, [], _156572)
   Call: (263) [system] compound('Atom')
^  Redo: (262) [user] subst_vars('Atom', _155632, [], _156572)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (262) [user] subst_vars(['Atom'], _155634, [], _130438)
^  Unify: (262) [user] subst_vars(['Atom'], ['Atom'], [], [])
   Call: (263) [system] var(['Atom'])
^  Redo: (262) [user] subst_vars(['Atom'], _155634, [], _130438)
^  Unify: (262) [user] subst_vars(['Atom'], [_177090|_177092], [], _130438)
^  Call: (263) [user] subst_vars('Atom', _177090, [], _178030)
^  Unify: (263) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (264) [system] var('Atom')
^  Redo: (263) [user] subst_vars('Atom', _177090, [], _178030)
^  Unify: (263) [user] subst_vars('Atom', _177090, [], _178030)
   Call: (264) [system] atom('Atom')
   Exit: (264) [system] atom('Atom')
^  Call: (264) [user] symbol_concat($, _184548, 'Atom')
^  Unify: (264) [user] symbol_concat($, _184548, 'Atom')
   Call: (265) [system] atom_concat($, _184548, 'Atom')
   Fail: (265) [system] atom_concat($, _184548, 'Atom')
^  Fail: (264) [user] symbol_concat($, _184548, 'Atom')
^  Redo: (263) [user] subst_vars('Atom', _177090, [], _178030)
^  Unify: (263) [user] subst_vars('Atom', _177090, [], _178030)
   Call: (264) [system] compound('Atom')
^  Redo: (263) [user] subst_vars('Atom', _177090, [], _178030)
^  Unify: (263) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (263) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (263) [user] subst_vars([], _177092, [], _130438)
^  Unify: (263) [user] subst_vars([], [], [], [])
   Call: (264) [system] var([])
^  Redo: (263) [user] subst_vars([], _177092, [], _130438)
^  Unify: (263) [user] subst_vars([], [], [], [])
^  Exit: (263) [user] subst_vars([], [], [], [])
^  Exit: (262) [user] subst_vars(['Atom'], ['Atom'], [], [])
^  Exit: (261) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
^  Exit: (260) [user] subst_vars([->, 'Atom', 'Atom'], [->, 'Atom', 'Atom'], [], [])
^  Call: (260) [user] subst_vars([], _129500, [], _82846)
^  Unify: (260) [user] subst_vars([], [], [], [])
   Call: (261) [system] var([])
^  Redo: (260) [user] subst_vars([], _129500, [], _82846)
^  Unify: (260) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([], [], [], [])
^  Exit: (259) [user] subst_vars([[->, 'Atom', 'Atom']], [[->, 'Atom', 'Atom']], [], [])
^  Exit: (258) [user] subst_vars([id, [->, 'Atom', 'Atom']], [id, [->, 'Atom', 'Atom']], [], [])
^  Exit: (257) [user] subst_vars([:, id, [->, 'Atom', 'Atom']], [:, id, [->, 'Atom', 'Atom']], [], [])
   Call: (257) [system] _211638=metta_file_buffer(+, [:, id, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(581, 18, 39, 581))
   Exit: (257) [system] metta_file_buffer(+, [:, id, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(581, 18, 39, 581))=metta_file_buffer(+, [:, id, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(581, 18, 39, 581))
^  Call: (257) [user] assertz(metta_file_buffer(+, [:, id, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(581, 18, 39, 581)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, [:, id, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(581, 18, 39, 581)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, id, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(581, 18, 39, 581))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, id, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(581, 18, 39, 581))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, id, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(581, 18, 39, 581))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, id, [->, 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(581, 18, 39, 581))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
   Redo: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _262432)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _263370))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _263370)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 604)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _262432)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _262432)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_262432))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_262432))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_262432))
   Exit: (259) [system] nonvar(position(_262432))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(604, 20, 21, 604)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(604, 20, 21, 604))
   Call: (257) [user] current_read_mode(file, _282850)
   Unify: (257) [user] current_read_mode(file, _282850)
   Call: (258) [system] nb_current(file_mode, _282850)
   Redo: (257) [user] current_read_mode(file, _282850)
   Call: (258) [system] _282850=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _289300)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _289300)
^  Call: (258) [user] clause(t_l:s_reader_info(_289300), _291246, _291168)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _289300)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _289300)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _289300)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _289300)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _289300)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _289300)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _289300)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _289300)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _305076)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (260) [system] char_type('\n', space)
   Exit: (260) [system] char_type('\n', space)
   Call: (260) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (260) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _289300)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _289300)
   Call: (261) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _289300)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _289300)
   Call: (261) [system] peek_char((0x55aefe44e2f0), _315282)
   Exit: (261) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (261) [system] char_type('(', space)
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _289300)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _289300)
^  Call: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (262) [system] string((0x55aefe44e2f0))
^  Redo: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _289300)
^  Unify: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _289300)
^  Call: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _289300)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _289300)
   Call: (263) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _289300)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _289300)
   Call: (263) [system] peek_char((0x55aefe44e2f0), _331036)
   Exit: (263) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (263) [system] char_type('(', space)
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _289300)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _289300)
   Call: (263) [system] _335678=(0x55aefe44e2f0)
   Exit: (263) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (263) [user] once((read_position((0x55aefe44e2f0), _337546, _337548, _337550, _337552), read_sexpr((0x55aefe44e2f0), _337564), assertz(metta_file_comment(_337546, _337548, _337550, _337564, _337552))))
^  Unify: (263) [system] once(user:(read_position((0x55aefe44e2f0), _337546, _337548, _337550, _337552), read_sexpr((0x55aefe44e2f0), _337564), assertz(metta_file_comment(_337546, _337548, _337550, _337564, _337552))))
^  Call: (265) [user] read_position((0x55aefe44e2f0), _337546, _337548, _337550, _337552)
^  Unify: (265) [user] read_position((0x55aefe44e2f0), _337546, _337548, _337550, _337552)
   Call: (266) [system] stream_property((0x55aefe44e2f0), position(_337552))
   Unify: (266) [system] stream_property((0x55aefe44e2f0), position(_337552))
   Call: (267) [system] nonvar((0x55aefe44e2f0))
   Exit: (267) [system] nonvar((0x55aefe44e2f0))
   Call: (267) [system] nonvar(position(_337552))
   Exit: (267) [system] nonvar(position(_337552))
   Exit: (266) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(605, 21, 0, 605)))
   Call: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(605, 21, 0, 605), _337546)
   Unify: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(605, 21, 0, 605), _337546)
   Call: (267) [system] nonvar(line_count)
   Exit: (267) [system] nonvar(line_count)
   Call: (267) [$syspreds] stream_position_field(line_count, _351534)
   Unify: (267) [$syspreds] stream_position_field(line_count, 2)
   Exit: (267) [$syspreds] stream_position_field(line_count, 2)
   Call: (267) [system] arg(2, '$stream_position'(605, 21, 0, 605), _337546)
   Exit: (267) [system] arg(2, '$stream_position'(605, 21, 0, 605), 21)
   Exit: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(605, 21, 0, 605), 21)
   Call: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(605, 21, 0, 605), _337548)
   Unify: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(605, 21, 0, 605), _337548)
   Call: (267) [system] nonvar(line_position)
   Exit: (267) [system] nonvar(line_position)
   Call: (267) [$syspreds] stream_position_field(line_position, _360828)
   Unify: (267) [$syspreds] stream_position_field(line_position, 3)
   Exit: (267) [$syspreds] stream_position_field(line_position, 3)
   Call: (267) [system] arg(3, '$stream_position'(605, 21, 0, 605), _337548)
   Exit: (267) [system] arg(3, '$stream_position'(605, 21, 0, 605), 0)
   Exit: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(605, 21, 0, 605), 0)
   Call: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(605, 21, 0, 605), _337550)
   Unify: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(605, 21, 0, 605), _337550)
   Call: (267) [system] nonvar(char_count)
   Exit: (267) [system] nonvar(char_count)
   Call: (267) [$syspreds] stream_position_field(char_count, _370122)
   Unify: (267) [$syspreds] stream_position_field(char_count, 1)
   Exit: (267) [$syspreds] stream_position_field(char_count, 1)
   Call: (267) [system] arg(1, '$stream_position'(605, 21, 0, 605), _337550)
   Exit: (267) [system] arg(1, '$stream_position'(605, 21, 0, 605), 605)
   Exit: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(605, 21, 0, 605), 605)
^  Exit: (265) [user] read_position((0x55aefe44e2f0), 21, 0, 605, '$stream_position'(605, 21, 0, 605))
^  Call: (265) [user] read_sexpr((0x55aefe44e2f0), _337564)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _337564)
   Call: (266) [system] string((0x55aefe44e2f0))
^  Redo: (265) [user] read_sexpr((0x55aefe44e2f0), _337564)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _337564)
^  Call: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _337564)
^  Unify: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _337564)
^  Call: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _384992)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (268) [system] '('=(;)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', 'white')
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', end_of_line)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', space)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', cntrl)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (267) [system] get_char((0x55aefe44e2f0), _401776)
   Exit: (267) [system] get_char((0x55aefe44e2f0), '(')
   Call: (267) [system] '('='('
   Exit: (267) [system] '('='('
^  Call: (267) [user] read_list(')', (0x55aefe44e2f0), _337564)
^  Unify: (267) [user] read_list(')', (0x55aefe44e2f0), _337564)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _409202)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), =)
   Call: (269) [system] (=)=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space(=)
^  Unify: (269) [user] is_like_space(=)
   Call: (270) [system] char_type(=, 'white')
^  Redo: (269) [user] is_like_space(=)
^  Unify: (269) [user] is_like_space(=)
   Call: (270) [system] char_type(=, end_of_line)
^  Redo: (269) [user] is_like_space(=)
^  Unify: (269) [user] is_like_space(=)
   Call: (270) [system] char_type(=, space)
^  Redo: (269) [user] is_like_space(=)
^  Unify: (269) [user] is_like_space(=)
   Call: (270) [system] char_type(=, cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _425986)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), =)
   Call: (268) [system] (=)=')'
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _337564)
   Call: (268) [system] (=)=end_of_file
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _337564)
^  Call: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _431564)
^  Unify: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _431564)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _435278)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), =)
   Call: (270) [system] (=)=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(=)
^  Unify: (270) [user] is_like_space(=)
   Call: (271) [system] char_type(=, 'white')
^  Redo: (270) [user] is_like_space(=)
^  Unify: (270) [user] is_like_space(=)
   Call: (271) [system] char_type(=, end_of_line)
^  Redo: (270) [user] is_like_space(=)
^  Unify: (270) [user] is_like_space(=)
   Call: (271) [system] char_type(=, space)
^  Redo: (270) [user] is_like_space(=)
^  Unify: (270) [user] is_like_space(=)
   Call: (271) [system] char_type(=, cntrl)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] get_char((0x55aefe44e2f0), _452062)
   Exit: (269) [system] get_char((0x55aefe44e2f0), =)
   Call: (269) [system] (=)='('
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _431564)
   Call: (269) [system] (=)='['
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _431564)
   Call: (269) [system] (=)='{'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _431564)
   Call: (269) [system] (=)='"'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _431564)
   Call: (269) [system] (=)=!
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _431564)
   Call: (269) [system] (=)='\''
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _431564)
   Call: (269) [system] (=)='`'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _431564)
   Call: (269) [system] (=)=end_of_file
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _431564)
^  Call: (269) [user] read_symbolic(')', (0x55aefe44e2f0), =, _431564)
^  Unify: (269) [user] read_symbolic(')', (0x55aefe44e2f0), =, _431564)
^  Call: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _470672)
^  Unify: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _470672)
   Call: (271) [system] peek_char((0x55aefe44e2f0), _472538)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] is_delimiter(' ')
^  Unify: (271) [user] is_delimiter(' ')
   Call: (272) [system] char_type(' ', space)
   Exit: (272) [system] char_type(' ', space)
^  Exit: (271) [user] is_delimiter(' ')
   Call: (271) [system] _470672=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (270) [user] classify_and_convert_charseq(=, [], _431564)
^  Unify: (270) [user] classify_and_convert_charseq(=, [], _431564)
^  Call: (272) [system] setup_call_cleanup('$notrace'(_483704, _483706), once(user:catch(read_from_chars([=], _431564), _483680, fail)), '$restore_trace'(_483704, _483706))
^  Unify: (272) [system] setup_call_cleanup(system:'$notrace'(_483704, _483706), system:once(user:catch(read_from_chars([=], _431564), _483680, fail)), system:'$restore_trace'(_483704, _483706))
^  Call: (273) [system] sig_atomic(system:'$notrace'(_483704, _483706))
^  Exit: (272) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([=], =), _483680, fail)), system:'$restore_trace'(3, -1))
   Call: (271) [system] atomic(=)
   Exit: (271) [system] atomic(=)
^  Exit: (270) [user] classify_and_convert_charseq(=, [], =)
^  Exit: (269) [user] read_symbolic(')', (0x55aefe44e2f0), =, =)
^  Exit: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), =)
^  Call: (268) [user] read_list(')', (0x55aefe44e2f0), _492142)
^  Unify: (268) [user] read_list(')', (0x55aefe44e2f0), _492142)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _495856)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (270) [system] ' '=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(' ')
^  Unify: (270) [user] is_like_space(' ')
   Call: (271) [system] char_type(' ', 'white')
   Exit: (271) [system] char_type(' ', 'white')
^  Exit: (270) [user] is_like_space(' ')
   Call: (270) [system] get_char((0x55aefe44e2f0), _504514)
   Exit: (270) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _508142)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', 'white')
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', end_of_line)
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', space)
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _7786)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (269) [system] '('=')'
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _5982)
   Call: (269) [system] '('=end_of_file
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _5982)
^  Call: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _13364)
^  Unify: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _13364)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _17078)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', 'white')
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', end_of_line)
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', space)
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] get_char((0x55aefe44e2f0), _33862)
   Exit: (270) [system] get_char((0x55aefe44e2f0), '(')
   Call: (270) [system] '('='('
   Exit: (270) [system] '('='('
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _13364)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _13364)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _41288)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), i)
   Call: (272) [system] i=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, 'white')
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, end_of_line)
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, space)
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _58072)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), i)
   Call: (271) [system] i=')'
^  Redo: (270) [user] read_list(')', (0x55aefe44e2f0), _13364)
   Call: (271) [system] i=end_of_file
^  Redo: (270) [user] read_list(')', (0x55aefe44e2f0), _13364)
^  Call: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _63650)
^  Unify: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _63650)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _67364)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), i)
   Call: (273) [system] i=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(i)
^  Unify: (273) [user] is_like_space(i)
   Call: (274) [system] char_type(i, 'white')
^  Redo: (273) [user] is_like_space(i)
^  Unify: (273) [user] is_like_space(i)
   Call: (274) [system] char_type(i, end_of_line)
^  Redo: (273) [user] is_like_space(i)
^  Unify: (273) [user] is_like_space(i)
   Call: (274) [system] char_type(i, space)
^  Redo: (273) [user] is_like_space(i)
^  Unify: (273) [user] is_like_space(i)
   Call: (274) [system] char_type(i, cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] get_char((0x55aefe44e2f0), _84148)
   Exit: (272) [system] get_char((0x55aefe44e2f0), i)
   Call: (272) [system] i='('
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _63650)
   Call: (272) [system] i='['
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _63650)
   Call: (272) [system] i='{'
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _63650)
   Call: (272) [system] i='"'
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _63650)
   Call: (272) [system] i=!
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _63650)
   Call: (272) [system] i='\''
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _63650)
   Call: (272) [system] i='`'
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _63650)
   Call: (272) [system] i=end_of_file
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _63650)
^  Call: (272) [user] read_symbolic(')', (0x55aefe44e2f0), i, _63650)
^  Unify: (272) [user] read_symbolic(')', (0x55aefe44e2f0), i, _63650)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _102758)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _102758)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _104624)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), d)
^  Call: (274) [user] is_delimiter(d)
^  Unify: (274) [user] is_delimiter(d)
   Call: (275) [system] char_type(d, space)
^  Redo: (274) [user] is_delimiter(d)
   Call: (275) [system] arg(_110264, v('(', ')', end_of_file), d)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _102758)
   Call: (274) [system] ')'==d
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _102758)
   Call: (274) [system] get_char((0x55aefe44e2f0), d)
   Exit: (274) [system] get_char((0x55aefe44e2f0), d)
   Call: (274) [system] d=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _102758)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _117630)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _117630)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _119496)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] is_delimiter(' ')
^  Unify: (275) [user] is_delimiter(' ')
   Call: (276) [system] char_type(' ', space)
   Exit: (276) [system] char_type(' ', space)
^  Exit: (275) [user] is_delimiter(' ')
   Call: (275) [system] _117630=[]
   Exit: (275) [system] []=[]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (274) [system] _102758=[d]
   Exit: (274) [system] [d]=[d]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [d])
^  Call: (273) [user] classify_and_convert_charseq(i, [d], _63650)
^  Unify: (273) [user] classify_and_convert_charseq(i, [d], _63650)
^  Call: (275) [system] setup_call_cleanup('$notrace'(_133456, _133458), once(user:catch(read_from_chars([i, d], _63650), _133432, fail)), '$restore_trace'(_133456, _133458))
^  Unify: (275) [system] setup_call_cleanup(system:'$notrace'(_133456, _133458), system:once(user:catch(read_from_chars([i, d], _63650), _133432, fail)), system:'$restore_trace'(_133456, _133458))
^  Call: (276) [system] sig_atomic(system:'$notrace'(_133456, _133458))
^  Exit: (275) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([i, d], id), _133432, fail)), system:'$restore_trace'(3, -1))
   Call: (274) [system] atomic(id)
   Exit: (274) [system] atomic(id)
^  Exit: (273) [user] classify_and_convert_charseq(i, [d], id)
^  Exit: (272) [user] read_symbolic(')', (0x55aefe44e2f0), i, id)
^  Exit: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), id)
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _141894)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _141894)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _145608)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (273) [system] ' '=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(' ')
^  Unify: (273) [user] is_like_space(' ')
   Call: (274) [system] char_type(' ', 'white')
   Exit: (274) [system] char_type(' ', 'white')
^  Exit: (273) [user] is_like_space(' ')
   Call: (273) [system] get_char((0x55aefe44e2f0), _154266)
   Exit: (273) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _157894)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), $)
   Call: (274) [system] ($)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, 'white')
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, end_of_line)
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, space)
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _175602)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), $)
   Call: (272) [system] ($)=')'
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _141894)
   Call: (272) [system] ($)=end_of_file
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _141894)
^  Call: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _181180)
^  Unify: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _181180)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _184894)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), $)
   Call: (274) [system] ($)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, 'white')
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, end_of_line)
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, space)
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] get_char((0x55aefe44e2f0), _201678)
   Exit: (273) [system] get_char((0x55aefe44e2f0), $)
   Call: (273) [system] ($)='('
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _181180)
   Call: (273) [system] ($)='['
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _181180)
   Call: (273) [system] ($)='{'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _181180)
   Call: (273) [system] ($)='"'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _181180)
   Call: (273) [system] ($)=!
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _181180)
   Call: (273) [system] ($)='\''
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _181180)
   Call: (273) [system] ($)='`'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _181180)
   Call: (273) [system] ($)=end_of_file
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _181180)
^  Call: (273) [user] read_symbolic(')', (0x55aefe44e2f0), $, _181180)
^  Unify: (273) [user] read_symbolic(')', (0x55aefe44e2f0), $, _181180)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _220288)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _220288)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _222154)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), x)
^  Call: (275) [user] is_delimiter(x)
^  Unify: (275) [user] is_delimiter(x)
   Call: (276) [system] char_type(x, space)
^  Redo: (275) [user] is_delimiter(x)
   Call: (276) [system] arg(_227794, v('(', ')', end_of_file), x)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _220288)
   Call: (275) [system] ')'==x
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _220288)
   Call: (275) [system] get_char((0x55aefe44e2f0), x)
   Exit: (275) [system] get_char((0x55aefe44e2f0), x)
   Call: (275) [system] x=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _220288)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _235160)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _235160)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _237026)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (276) [user] is_delimiter(')')
^  Unify: (276) [user] is_delimiter(')')
   Call: (277) [system] char_type(')', space)
^  Redo: (276) [user] is_delimiter(')')
   Call: (277) [system] arg(_242666, v('(', ')', end_of_file), ')')
   Exit: (277) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (276) [user] is_delimiter(')')
   Call: (276) [system] _235160=[]
   Exit: (276) [system] []=[]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (275) [system] _220288=[x]
   Exit: (275) [system] [x]=[x]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [x])
^  Call: (274) [user] classify_and_convert_charseq($, [x], _181180)
^  Unify: (274) [user] classify_and_convert_charseq($, [x], '$VAR'(_251896))
   Call: (275) [system] atom_chars(_251896, ['_', x])
   Exit: (275) [system] atom_chars('_x', ['_', x])
^  Exit: (274) [user] classify_and_convert_charseq($, [x], _x)
^  Exit: (273) [user] read_symbolic(')', (0x55aefe44e2f0), $, _x)
^  Exit: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _x)
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _257492)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _257492)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _261206)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (274) [system] ')'=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(')')
^  Unify: (274) [user] is_like_space(')')
   Call: (275) [system] char_type(')', 'white')
^  Redo: (274) [user] is_like_space(')')
^  Unify: (274) [user] is_like_space(')')
   Call: (275) [system] char_type(')', end_of_line)
^  Redo: (274) [user] is_like_space(')')
^  Unify: (274) [user] is_like_space(')')
   Call: (275) [system] char_type(')', space)
^  Redo: (274) [user] is_like_space(')')
^  Unify: (274) [user] is_like_space(')')
   Call: (275) [system] char_type(')', cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _277990)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (273) [system] ')'=')'
   Exit: (273) [system] ')'=')'
   Call: (273) [system] get_char((0x55aefe44e2f0), _281780)
   Exit: (273) [system] get_char((0x55aefe44e2f0), ')')
   Call: (273) [system] _257492=[]
   Exit: (273) [system] []=[]
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (272) [system] _141894=[_x]
   Exit: (272) [system] [_x]=[_x]
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [_x])
   Call: (271) [system] _13364=[id, _x]
   Exit: (271) [system] [id, _x]=[id, _x]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [id, _x])
^  Exit: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), [id, _x])
^  Call: (269) [user] read_list(')', (0x55aefe44e2f0), _292868)
^  Unify: (269) [user] read_list(')', (0x55aefe44e2f0), _292868)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _296582)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (271) [system] ' '=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(' ')
^  Unify: (271) [user] is_like_space(' ')
   Call: (272) [system] char_type(' ', 'white')
   Exit: (272) [system] char_type(' ', 'white')
^  Exit: (271) [user] is_like_space(' ')
   Call: (271) [system] get_char((0x55aefe44e2f0), _305240)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _308868)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), $)
   Call: (272) [system] ($)=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space($)
^  Unify: (272) [user] is_like_space($)
   Call: (273) [system] char_type($, 'white')
^  Redo: (272) [user] is_like_space($)
^  Unify: (272) [user] is_like_space($)
   Call: (273) [system] char_type($, end_of_line)
^  Redo: (272) [user] is_like_space($)
^  Unify: (272) [user] is_like_space($)
   Call: (273) [system] char_type($, space)
^  Redo: (272) [user] is_like_space($)
^  Unify: (272) [user] is_like_space($)
   Call: (273) [system] char_type($, cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _326576)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), $)
   Call: (270) [system] ($)=')'
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _292868)
   Call: (270) [system] ($)=end_of_file
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _292868)
^  Call: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _332154)
^  Unify: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _332154)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _335868)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), $)
   Call: (272) [system] ($)=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space($)
^  Unify: (272) [user] is_like_space($)
   Call: (273) [system] char_type($, 'white')
^  Redo: (272) [user] is_like_space($)
^  Unify: (272) [user] is_like_space($)
   Call: (273) [system] char_type($, end_of_line)
^  Redo: (272) [user] is_like_space($)
^  Unify: (272) [user] is_like_space($)
   Call: (273) [system] char_type($, space)
^  Redo: (272) [user] is_like_space($)
^  Unify: (272) [user] is_like_space($)
   Call: (273) [system] char_type($, cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] get_char((0x55aefe44e2f0), _352652)
   Exit: (271) [system] get_char((0x55aefe44e2f0), $)
   Call: (271) [system] ($)='('
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _332154)
   Call: (271) [system] ($)='['
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _332154)
   Call: (271) [system] ($)='{'
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _332154)
   Call: (271) [system] ($)='"'
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _332154)
   Call: (271) [system] ($)=!
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _332154)
   Call: (271) [system] ($)='\''
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _332154)
   Call: (271) [system] ($)='`'
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _332154)
   Call: (271) [system] ($)=end_of_file
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _332154)
^  Call: (271) [user] read_symbolic(')', (0x55aefe44e2f0), $, _332154)
^  Unify: (271) [user] read_symbolic(')', (0x55aefe44e2f0), $, _332154)
^  Call: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _371262)
^  Unify: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _371262)
   Call: (273) [system] peek_char((0x55aefe44e2f0), _373128)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), x)
^  Call: (273) [user] is_delimiter(x)
^  Unify: (273) [user] is_delimiter(x)
   Call: (274) [system] char_type(x, space)
^  Redo: (273) [user] is_delimiter(x)
   Call: (274) [system] arg(_378768, v('(', ')', end_of_file), x)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _371262)
   Call: (273) [system] ')'==x
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _371262)
   Call: (273) [system] get_char((0x55aefe44e2f0), x)
   Exit: (273) [system] get_char((0x55aefe44e2f0), x)
   Call: (273) [system] x=(\)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _371262)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _386134)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _386134)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _388000)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (274) [user] is_delimiter(')')
^  Unify: (274) [user] is_delimiter(')')
   Call: (275) [system] char_type(')', space)
^  Redo: (274) [user] is_delimiter(')')
   Call: (275) [system] arg(_393640, v('(', ')', end_of_file), ')')
   Exit: (275) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (274) [user] is_delimiter(')')
   Call: (274) [system] _386134=[]
   Exit: (274) [system] []=[]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (273) [system] _371262=[x]
   Exit: (273) [system] [x]=[x]
^  Exit: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [x])
^  Call: (272) [user] classify_and_convert_charseq($, [x], _332154)
^  Unify: (272) [user] classify_and_convert_charseq($, [x], '$VAR'(_402870))
   Call: (273) [system] atom_chars(_402870, ['_', x])
   Exit: (273) [system] atom_chars('_x', ['_', x])
^  Exit: (272) [user] classify_and_convert_charseq($, [x], _x)
^  Exit: (271) [user] read_symbolic(')', (0x55aefe44e2f0), $, _x)
^  Exit: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _x)
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _408466)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _408466)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _412180)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (272) [system] ')'=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', 'white')
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', end_of_line)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', space)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _428964)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (271) [system] ')'=')'
   Exit: (271) [system] ')'=')'
   Call: (271) [system] get_char((0x55aefe44e2f0), _432754)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ')')
   Call: (271) [system] _408466=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (270) [system] _292868=[_x]
   Exit: (270) [system] [_x]=[_x]
^  Exit: (269) [user] read_list(')', (0x55aefe44e2f0), [_x])
   Call: (269) [system] _5982=[[id, _x], _x]
   Exit: (269) [system] [[id, _x], _x]=[[id, _x], _x]
^  Exit: (268) [user] read_list(')', (0x55aefe44e2f0), [[id, _x], _x])
   Call: (268) [system] _5942=[=, [id, _x], _x]
   Exit: (268) [system] [=, [id, _x], _x]=[=, [id, _x], _x]
^  Exit: (267) [user] read_list(')', (0x55aefe44e2f0), [=, [id, _x], _x])
^  Exit: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), [=, [id, _x], _x])
^  Exit: (265) [user] read_sexpr((0x55aefe44e2f0), [=, [id, _x], _x])
^  Call: (265) [user] assertz(metta_file_comment(21, 0, 605, [=, [id, _x], _x], '$stream_position'(605, 21, 0, 605)))
^  Exit: (265) [user] assertz(metta_file_comment(21, 0, 605, [=, [id, _x], _x], '$stream_position'(605, 21, 0, 605)))
^  Exit: (263) [system] once(user:(read_position((0x55aefe44e2f0), 21, 0, 605, '$stream_position'(605, 21, 0, 605)), read_sexpr((0x55aefe44e2f0), [=, [id, _x], _x]), assertz(metta_file_comment(21, 0, 605, [=, [id, _x], _x], '$stream_position'(605, 21, 0, 605)))))
   Call: (263) [system] fail
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Call: (263) [user] retract(metta_file_comment(_453128, _453130, _453132, _453134, _453136))
^  Exit: (263) [user] retract(metta_file_comment(21, 0, 605, [=, [id, _x], _x], '$stream_position'(605, 21, 0, 605)))
^  Call: (263) [user] trly(untyped_to_metta, [=, [id, _x], _x], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [=, [id, _x], _x], _5908)
^  Call: (264) [user] once(call(untyped_to_metta, [=, [id, _x], _x], _456916))
^  Unify: (264) [system] once(user:call(untyped_to_metta, [=, [id, _x], _x], _456916))
^  Call: (265) [user] call(untyped_to_metta, [=, [id, _x], _x], _456916)
^  Unify: (265) [system] call(user:untyped_to_metta, [=, [id, _x], _x], _456916)
^  Call: (266) [user] untyped_to_metta([=, [id, _x], _x], _456916)
^  Unify: (266) [user] untyped_to_metta([=, [id, _x], _x], _456916)
^  Call: (267) [user] must_det_ll(trly(mfix_vars1, [=, [id, _x], _x], _462528))
^  Unify: (267) [user] must_det_ll(user:trly(mfix_vars1, [=, [id, _x], _x], _462528))
^  Call: (268) [user] once(user:trly(mfix_vars1, [=, [id, _x], _x], _462528))
^  Unify: (268) [system] once(user:trly(mfix_vars1, [=, [id, _x], _x], _462528))
^  Call: (269) [user] trly(mfix_vars1, [=, [id, _x], _x], _462528)
^  Unify: (269) [user] trly(mfix_vars1, [=, [id, _x], _x], _462528)
^  Call: (270) [user] once(call(mfix_vars1, [=, [id, _x], _x], _468114))
^  Unify: (270) [system] once(user:call(mfix_vars1, [=, [id, _x], _x], _468114))
^  Call: (271) [user] call(mfix_vars1, [=, [id, _x], _x], _468114)
^  Unify: (271) [system] call(user:mfix_vars1, [=, [id, _x], _x], _468114)
^  Call: (272) [user] mfix_vars1([=, [id, _x], _x], _468114)
^  Unify: (272) [user] mfix_vars1([=, [id, _x], _x], _468114)
   Call: (273) [system] var([=, [id, _x], _x])
^  Redo: (272) [user] mfix_vars1([=, [id, _x], _x], _468114)
^  Unify: (272) [user] mfix_vars1([=, [id, _x], _x], '$VAR'(_475574))
   Call: (273) [system] atom([=, [id, _x], _x])
^  Redo: (272) [user] mfix_vars1([=, [id, _x], _x], _468114)
^  Unify: (272) [user] mfix_vars1([=, [id, _x], _x], _468114)
   Call: (273) [system] [=, [id, _x], _x]==true
^  Redo: (272) [user] mfix_vars1([=, [id, _x], _x], _468114)
^  Unify: (272) [user] mfix_vars1([=, [id, _x], _x], _468114)
   Call: (273) [system] [=, [id, _x], _x]==false
^  Redo: (272) [user] mfix_vars1([=, [id, _x], _x], _468114)
^  Unify: (272) [user] mfix_vars1([=, [id, _x], _x], _468114)
   Call: (273) [system] (=)=='['
^  Redo: (272) [user] mfix_vars1([=, [id, _x], _x], _468114)
^  Unify: (272) [user] mfix_vars1([=, [id, _x], _x], _468114)
   Call: (273) [system] (=)=='{'
^  Redo: (272) [user] mfix_vars1([=, [id, _x], _x], _468114)
^  Unify: (272) [user] mfix_vars1([=, [id, _x], _x], _468114)
   Call: (273) [system] is_list([[id, _x], _x])
   Exit: (273) [system] is_list([[id, _x], _x])
   Call: (273) [lists] lists:last([[id, _x], _x], _492268)
   Unify: (273) [lists] lists:last([[id, _x], _x], _492268)
   Call: (274) [lists] lists:last_([_x], [id, _x], _492268)
   Unify: (274) [lists] lists:last_([_x], [id, _x], _492268)
   Call: (275) [lists] lists:last_([], _x, _492268)
   Unify: (275) [lists] lists:last_([], _x, _x)
   Exit: (275) [lists] lists:last_([], _x, _x)
   Exit: (274) [lists] lists:last_([_x], [id, _x], _x)
   Exit: (273) [lists] lists:last([[id, _x], _x], _x)
   Call: (273) [system] _x=='}'
^  Redo: (272) [user] mfix_vars1([=, [id, _x], _x], _468114)
^  Unify: (272) [user] mfix_vars1([=, [id, _x], _x], _468114)
   Call: (273) [system] [=, [id, _x], _x]==[_503432, _503438]
^  Redo: (272) [user] mfix_vars1([=, [id, _x], _x], _468114)
^  Unify: (272) [user] mfix_vars1([=, [id, _x], _x], _468114)
   Call: (273) [system] fail
^  Redo: (272) [user] mfix_vars1([=, [id, _x], _x], _468114)
^  Unify: (272) [user] mfix_vars1([=, [id, _x], _x], _468114)
   Call: (273) [system] is_list([=, [id, _x], _x])
   Exit: (273) [system] is_list([=, [id, _x], _x])
^  Call: (273) [user] apply:maplist(mfix_vars1, [=, [id, _x], _x], _468114)
^  Unify: (273) [apply] apply:maplist(user:mfix_vars1, [=, [id, _x], _x], _468114)
   Call: (274) [apply] apply:maplist_([=, [id, _x], _x], _468114, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([=, [id, _x], _x], [_513662|_513664], user:mfix_vars1)
^  Call: (275) [user] mfix_vars1(=, _513662)
^  Unify: (275) [user] mfix_vars1(=, _513662)
   Call: (276) [system] var(=)
^  Redo: (275) [user] mfix_vars1(=, _513662)
^  Unify: (275) [user] mfix_vars1(=, '$VAR'(_518308))
   Call: (276) [system] atom(=)
   Exit: (276) [system] atom(=)
^  Call: (276) [user] symbol_concat($, _521086, =)
^  Unify: (276) [user] symbol_concat($, _521086, =)
   Call: (277) [system] atom_concat($, _521086, =)
   Fail: (277) [system] atom_concat($, _6022, =)
^  Fail: (276) [user] symbol_concat($, _6022, =)
^  Redo: (275) [user] mfix_vars1(=, _6014)
^  Unify: (275) [user] mfix_vars1(=, _6014)
   Call: (276) [system] (=)==true
^  Redo: (275) [user] mfix_vars1(=, _6014)
^  Unify: (275) [user] mfix_vars1(=, _6014)
   Call: (276) [system] (=)==false
^  Redo: (275) [user] mfix_vars1(=, _6014)
^  Unify: (275) [user] mfix_vars1(=, _6014)
   Call: (276) [system] (=)==[_15184, _15190]
^  Redo: (275) [user] mfix_vars1(=, _6014)
^  Unify: (275) [user] mfix_vars1(=, _6014)
   Call: (276) [system] is_list(=)
^  Redo: (275) [user] mfix_vars1(=, _6014)
^  Unify: (275) [user] mfix_vars1(=, _6014)
   Call: (276) [system] string(=)
^  Redo: (275) [user] mfix_vars1(=, _6014)
^  Unify: (275) [user] mfix_vars1(=, _6014)
   Call: (276) [system] compound(=)
^  Redo: (275) [user] mfix_vars1(=, _6014)
^  Unify: (275) [user] mfix_vars1(=, _6014)
^  Call: (276) [user] symbol(=)
^  Unify: (276) [user] symbol(=)
   Call: (277) [system] atom(=)
   Exit: (277) [system] atom(=)
^  Exit: (276) [user] symbol(=)
^  Unify: (275) [user] mfix_vars1(=, =)
^  Exit: (275) [user] mfix_vars1(=, =)
   Call: (275) [apply] apply:maplist_([[id, _x], _x], _6016, user:mfix_vars1)
   Unify: (275) [apply] apply:maplist_([[id, _x], _x], [_33728|_33730], user:mfix_vars1)
^  Call: (276) [user] mfix_vars1([id, _x], _33728)
^  Unify: (276) [user] mfix_vars1([id, _x], _33728)
   Call: (277) [system] var([id, _x])
^  Redo: (276) [user] mfix_vars1([id, _x], _33728)
^  Unify: (276) [user] mfix_vars1([id, _x], '$VAR'(_38374))
   Call: (277) [system] atom([id, _x])
^  Redo: (276) [user] mfix_vars1([id, _x], _33728)
^  Unify: (276) [user] mfix_vars1([id, _x], _33728)
   Call: (277) [system] [id, _x]==true
^  Redo: (276) [user] mfix_vars1([id, _x], _33728)
^  Unify: (276) [user] mfix_vars1([id, _x], _33728)
   Call: (277) [system] [id, _x]==false
^  Redo: (276) [user] mfix_vars1([id, _x], _33728)
^  Unify: (276) [user] mfix_vars1([id, _x], _33728)
   Call: (277) [system] id=='['
^  Redo: (276) [user] mfix_vars1([id, _x], _33728)
^  Unify: (276) [user] mfix_vars1([id, _x], _33728)
   Call: (277) [system] id=='{'
^  Redo: (276) [user] mfix_vars1([id, _x], _33728)
^  Unify: (276) [user] mfix_vars1([id, _x], _33728)
   Call: (277) [system] is_list([_x])
   Exit: (277) [system] is_list([_x])
   Call: (277) [lists] lists:last([_x], _55068)
   Unify: (277) [lists] lists:last([_x], _55068)
   Call: (278) [lists] lists:last_([], _x, _55068)
   Unify: (278) [lists] lists:last_([], _x, _x)
   Exit: (278) [lists] lists:last_([], _x, _x)
   Exit: (277) [lists] lists:last([_x], _x)
   Call: (277) [system] _x=='}'
^  Redo: (276) [user] mfix_vars1([id, _x], _33728)
^  Unify: (276) [user] mfix_vars1([id, _x], _33728)
   Call: (277) [system] [id, _x]==[_63436, _63442]
^  Redo: (276) [user] mfix_vars1([id, _x], _33728)
^  Unify: (276) [user] mfix_vars1([id, _x], _33728)
   Call: (277) [system] fail
^  Redo: (276) [user] mfix_vars1([id, _x], _33728)
^  Unify: (276) [user] mfix_vars1([id, _x], _33728)
   Call: (277) [system] is_list([id, _x])
   Exit: (277) [system] is_list([id, _x])
^  Call: (277) [user] apply:maplist(mfix_vars1, [id, _x], _33728)
^  Unify: (277) [apply] apply:maplist(user:mfix_vars1, [id, _x], _33728)
   Call: (278) [apply] apply:maplist_([id, _x], _33728, user:mfix_vars1)
   Unify: (278) [apply] apply:maplist_([id, _x], [_73666|_73668], user:mfix_vars1)
^  Call: (279) [user] mfix_vars1(id, _73666)
^  Unify: (279) [user] mfix_vars1(id, _73666)
   Call: (280) [system] var(id)
^  Redo: (279) [user] mfix_vars1(id, _73666)
^  Unify: (279) [user] mfix_vars1(id, '$VAR'(_78312))
   Call: (280) [system] atom(id)
   Exit: (280) [system] atom(id)
^  Call: (280) [user] symbol_concat($, _81090, id)
^  Unify: (280) [user] symbol_concat($, _81090, id)
   Call: (281) [system] atom_concat($, _81090, id)
   Fail: (281) [system] atom_concat($, _81090, id)
^  Fail: (280) [user] symbol_concat($, _81090, id)
^  Redo: (279) [user] mfix_vars1(id, _73666)
^  Unify: (279) [user] mfix_vars1(id, _73666)
   Call: (280) [system] id==true
^  Redo: (279) [user] mfix_vars1(id, _73666)
^  Unify: (279) [user] mfix_vars1(id, _73666)
   Call: (280) [system] id==false
^  Redo: (279) [user] mfix_vars1(id, _73666)
^  Unify: (279) [user] mfix_vars1(id, _73666)
   Call: (280) [system] id==[_93178, _93184]
^  Redo: (279) [user] mfix_vars1(id, _73666)
^  Unify: (279) [user] mfix_vars1(id, _73666)
   Call: (280) [system] is_list(id)
^  Redo: (279) [user] mfix_vars1(id, _73666)
^  Unify: (279) [user] mfix_vars1(id, _73666)
   Call: (280) [system] string(id)
^  Redo: (279) [user] mfix_vars1(id, _73666)
^  Unify: (279) [user] mfix_vars1(id, _73666)
   Call: (280) [system] compound(id)
^  Redo: (279) [user] mfix_vars1(id, _73666)
^  Unify: (279) [user] mfix_vars1(id, _73666)
^  Call: (280) [user] symbol(id)
^  Unify: (280) [user] symbol(id)
   Call: (281) [system] atom(id)
   Exit: (281) [system] atom(id)
^  Exit: (280) [user] symbol(id)
^  Unify: (279) [user] mfix_vars1(id, id)
^  Exit: (279) [user] mfix_vars1(id, id)
   Call: (279) [apply] apply:maplist_([_x], _73668, user:mfix_vars1)
   Unify: (279) [apply] apply:maplist_([_x], [_111722|_111724], user:mfix_vars1)
^  Call: (280) [user] mfix_vars1(_x, _111722)
^  Unify: (280) [user] mfix_vars1(_x, _111722)
   Call: (281) [system] var(_x)
^  Redo: (280) [user] mfix_vars1(_x, _111722)
^  Unify: (280) [user] mfix_vars1(_x, '$VAR'(_116368))
   Call: (281) [system] atom(_x)
^  Redo: (280) [user] mfix_vars1(_x, _111722)
^  Unify: (280) [user] mfix_vars1(_x, _111722)
   Call: (281) [system] _x==true
^  Redo: (280) [user] mfix_vars1(_x, _111722)
^  Unify: (280) [user] mfix_vars1(_x, _111722)
   Call: (281) [system] _x==false
^  Redo: (280) [user] mfix_vars1(_x, _111722)
^  Unify: (280) [user] mfix_vars1(_x, _111722)
   Call: (281) [system] _x==[_125648, _125654]
^  Redo: (280) [user] mfix_vars1(_x, _111722)
^  Unify: (280) [user] mfix_vars1(_x, _111722)
   Call: (281) [system] is_list(_x)
^  Redo: (280) [user] mfix_vars1(_x, _111722)
^  Unify: (280) [user] mfix_vars1(_x, _111722)
   Call: (281) [system] string(_x)
^  Redo: (280) [user] mfix_vars1(_x, _111722)
^  Unify: (280) [user] mfix_vars1(_x, _111722)
   Call: (281) [system] compound(_x)
   Exit: (281) [system] compound(_x)
   Call: (281) [system] compound_name_arguments(_x, _135850, _135852)
   Exit: (281) [system] compound_name_arguments(_x, '$VAR', ['_x'])
   Call: (281) [system] '$VAR'\=='$VAR'
^  Redo: (269) [user] trly(mfix_vars1, [=, [id, _x], _x], _5978)
^  Unify: (269) [user] trly(mfix_vars1, [=, [id, _x], _x], [=, [id, _x], _x])
^  Exit: (269) [user] trly(mfix_vars1, [=, [id, _x], _x], [=, [id, _x], _x])
^  Exit: (268) [system] once(user:trly(mfix_vars1, [=, [id, _x], _x], [=, [id, _x], _x]))
^  Exit: (267) [user] must_det_ll(user:trly(mfix_vars1, [=, [id, _x], _x], [=, [id, _x], _x]))
^  Call: (267) [user] must_det_ll(trly(cons_to_c, [=, [id, _x], _x], _143308))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_c, [=, [id, _x], _x], _143308))
^  Call: (268) [user] once(user:trly(cons_to_c, [=, [id, _x], _x], _143308))
^  Unify: (268) [system] once(user:trly(cons_to_c, [=, [id, _x], _x], _143308))
^  Call: (269) [user] trly(cons_to_c, [=, [id, _x], _x], _143308)
^  Unify: (269) [user] trly(cons_to_c, [=, [id, _x], _x], _143308)
^  Call: (270) [user] once(call(cons_to_c, [=, [id, _x], _x], _148894))
^  Unify: (270) [system] once(user:call(cons_to_c, [=, [id, _x], _x], _148894))
^  Call: (271) [user] call(cons_to_c, [=, [id, _x], _x], _148894)
^  Unify: (271) [system] call(user:cons_to_c, [=, [id, _x], _x], _148894)
^  Call: (272) [user] cons_to_c([=, [id, _x], _x], _148894)
^  Unify: (272) [user] cons_to_c([=, [id, _x], _x], [=, [id, _x], _x])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_c([=, [id, _x], _x], [=, [id, _x], _x])
^  Exit: (271) [system] call(user:cons_to_c, [=, [id, _x], _x], [=, [id, _x], _x])
^  Exit: (270) [system] once(user:call(cons_to_c, [=, [id, _x], _x], [=, [id, _x], _x]))
   Call: (270) [system] [=, [id, _x], _x]\=@=[=, [id, _x], _x]
^  Redo: (269) [user] trly(cons_to_c, [=, [id, _x], _x], _143308)
^  Unify: (269) [user] trly(cons_to_c, [=, [id, _x], _x], [=, [id, _x], _x])
^  Exit: (269) [user] trly(cons_to_c, [=, [id, _x], _x], [=, [id, _x], _x])
^  Exit: (268) [system] once(user:trly(cons_to_c, [=, [id, _x], _x], [=, [id, _x], _x]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_c, [=, [id, _x], _x], [=, [id, _x], _x]))
^  Call: (267) [user] must_det_ll(trly(cons_to_l, [=, [id, _x], _x], _5958))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_l, [=, [id, _x], _x], _5958))
^  Call: (268) [user] once(user:trly(cons_to_l, [=, [id, _x], _x], _5958))
^  Unify: (268) [system] once(user:trly(cons_to_l, [=, [id, _x], _x], _5958))
^  Call: (269) [user] trly(cons_to_l, [=, [id, _x], _x], _5958)
^  Unify: (269) [user] trly(cons_to_l, [=, [id, _x], _x], _5958)
^  Call: (270) [user] once(call(cons_to_l, [=, [id, _x], _x], _171214))
^  Unify: (270) [system] once(user:call(cons_to_l, [=, [id, _x], _x], _171214))
^  Call: (271) [user] call(cons_to_l, [=, [id, _x], _x], _171214)
^  Unify: (271) [system] call(user:cons_to_l, [=, [id, _x], _x], _171214)
^  Call: (272) [user] cons_to_l([=, [id, _x], _x], _171214)
^  Unify: (272) [user] cons_to_l([=, [id, _x], _x], [=, [id, _x], _x])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_l([=, [id, _x], _x], [=, [id, _x], _x])
^  Exit: (271) [system] call(user:cons_to_l, [=, [id, _x], _x], [=, [id, _x], _x])
^  Exit: (270) [system] once(user:call(cons_to_l, [=, [id, _x], _x], [=, [id, _x], _x]))
   Call: (270) [system] [=, [id, _x], _x]\=@=[=, [id, _x], _x]
^  Redo: (269) [user] trly(cons_to_l, [=, [id, _x], _x], _5958)
^  Unify: (269) [user] trly(cons_to_l, [=, [id, _x], _x], [=, [id, _x], _x])
^  Exit: (269) [user] trly(cons_to_l, [=, [id, _x], _x], [=, [id, _x], _x])
^  Exit: (268) [system] once(user:trly(cons_to_l, [=, [id, _x], _x], [=, [id, _x], _x]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_l, [=, [id, _x], _x], [=, [id, _x], _x]))
^  Exit: (266) [user] untyped_to_metta([=, [id, _x], _x], [=, [id, _x], _x])
^  Exit: (265) [system] call(user:untyped_to_metta, [=, [id, _x], _x], [=, [id, _x], _x])
^  Exit: (264) [system] once(user:call(untyped_to_metta, [=, [id, _x], _x], [=, [id, _x], _x]))
   Call: (264) [system] [=, [id, _x], _x]\=@=[=, [id, _x], _x]
^  Redo: (263) [user] trly(untyped_to_metta, [=, [id, _x], _x], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [=, [id, _x], _x], [=, [id, _x], _x])
^  Exit: (263) [user] trly(untyped_to_metta, [=, [id, _x], _x], [=, [id, _x], _x])
^  Exit: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, [id, _x], _x])
   Call: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, [id, _x], _x])))
   Unify: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, [id, _x], _x])))
   Exit: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, [id, _x], _x])))
^  Exit: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [=, [id, _x], _x])
^  Exit: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [=, [id, _x], _x])
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, [id, _x], _x])
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, [id, _x], _x])))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, [id, _x], _x])))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, [id, _x], _x])))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [=, [id, _x], _x])
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), [=, [id, _x], _x])
^  Call: (257) [user] subst_vars([=, [id, _x], _x], _205522, [], _205524)
^  Unify: (257) [user] subst_vars([=, [id, _x], _x], [=, [id, _x], _x], [], [])
   Call: (258) [system] var([=, [id, _x], _x])
^  Redo: (257) [user] subst_vars([=, [id, _x], _x], _205522, [], _205524)
^  Unify: (257) [user] subst_vars([=, [id, _x], _x], [_209260|_209262], [], _205524)
^  Call: (258) [user] subst_vars(=, _209260, [], _210200)
^  Unify: (258) [user] subst_vars(=, =, [], [])
   Call: (259) [system] var(=)
^  Redo: (258) [user] subst_vars(=, _209260, [], _210200)
^  Unify: (258) [user] subst_vars(=, _209260, [], _210200)
   Call: (259) [system] atom(=)
   Exit: (259) [system] atom(=)
^  Call: (259) [user] symbol_concat($, _216718, =)
^  Unify: (259) [user] symbol_concat($, _216718, =)
   Call: (260) [system] atom_concat($, _216718, =)
   Fail: (260) [system] atom_concat($, _216718, =)
^  Fail: (259) [user] symbol_concat($, _216718, =)
^  Redo: (258) [user] subst_vars(=, _209260, [], _210200)
^  Unify: (258) [user] subst_vars(=, _209260, [], _210200)
   Call: (259) [system] compound(=)
^  Redo: (258) [user] subst_vars(=, _209260, [], _210200)
^  Unify: (258) [user] subst_vars(=, =, [], [])
^  Exit: (258) [user] subst_vars(=, =, [], [])
^  Call: (258) [user] subst_vars([[id, _x], _x], _209262, [], _205524)
^  Unify: (258) [user] subst_vars([[id, _x], _x], [[id, _x], _x], [], [])
   Call: (259) [system] var([[id, _x], _x])
^  Redo: (258) [user] subst_vars([[id, _x], _x], _209262, [], _205524)
^  Unify: (258) [user] subst_vars([[id, _x], _x], [_230718|_230720], [], _205524)
^  Call: (259) [user] subst_vars([id, _x], _230718, [], _231658)
^  Unify: (259) [user] subst_vars([id, _x], [id, _x], [], [])
   Call: (260) [system] var([id, _x])
^  Redo: (259) [user] subst_vars([id, _x], _230718, [], _231658)
^  Unify: (259) [user] subst_vars([id, _x], [_235394|_235396], [], _231658)
^  Call: (260) [user] subst_vars(id, _235394, [], _236334)
^  Unify: (260) [user] subst_vars(id, id, [], [])
   Call: (261) [system] var(id)
^  Redo: (260) [user] subst_vars(id, _235394, [], _236334)
^  Unify: (260) [user] subst_vars(id, _235394, [], _236334)
   Call: (261) [system] atom(id)
   Exit: (261) [system] atom(id)
^  Call: (261) [user] symbol_concat($, _242852, id)
^  Unify: (261) [user] symbol_concat($, _242852, id)
   Call: (262) [system] atom_concat($, _242852, id)
   Fail: (262) [system] atom_concat($, _242852, id)
^  Fail: (261) [user] symbol_concat($, _242852, id)
^  Redo: (260) [user] subst_vars(id, _235394, [], _236334)
^  Unify: (260) [user] subst_vars(id, _235394, [], _236334)
   Call: (261) [system] compound(id)
^  Redo: (260) [user] subst_vars(id, _235394, [], _236334)
^  Unify: (260) [user] subst_vars(id, id, [], [])
^  Exit: (260) [user] subst_vars(id, id, [], [])
^  Call: (260) [user] subst_vars([_x], _235396, [], _231658)
^  Unify: (260) [user] subst_vars([_x], [_x], [], [])
   Call: (261) [system] var([_x])
^  Redo: (260) [user] subst_vars([_x], _235396, [], _231658)
^  Unify: (260) [user] subst_vars([_x], [_256852|_256854], [], _231658)
^  Call: (261) [user] subst_vars(_x, _256852, [], _257792)
^  Unify: (261) [user] subst_vars(_x, _x, [], [])
   Call: (262) [system] var(_x)
^  Redo: (261) [user] subst_vars(_x, _256852, [], _257792)
^  Unify: (261) [user] subst_vars(_x, _256852, [], _257792)
   Call: (262) [system] nonvar('_x')
   Exit: (262) [system] nonvar('_x')
^  Call: (262) [user] svar_fixvarname_dont_capitalize('_x', _264310)
^  Unify: (262) [user] svar_fixvarname_dont_capitalize('_x', '_x')
^  Exit: (262) [user] svar_fixvarname_dont_capitalize('_x', '_x')
   Call: (262) [system] memberchk('_x'=_256852, [])
   Unify: (262) [system] memberchk('_x'=_256852, [])
^  Redo: (261) [user] subst_vars(_x, _256852, [], _257792)
   Call: (262) [system] _257792=['_x'=_256852]
   Exit: (262) [system] ['_x'=_256852]=['_x'=_256852]
^  Exit: (261) [user] subst_vars(_x, _256852, [], ['_x'=_256852])
^  Call: (261) [user] subst_vars([], _256854, ['_x'=_256852], _231658)
^  Unify: (261) [user] subst_vars([], [], ['_x'=_256852], ['_x'=_256852])
   Call: (262) [system] var([])
^  Redo: (261) [user] subst_vars([], _256854, ['_x'=_256852], _231658)
^  Unify: (261) [user] subst_vars([], [], ['_x'=_256852], ['_x'=_256852])
^  Exit: (261) [user] subst_vars([], [], ['_x'=_256852], ['_x'=_256852])
^  Exit: (260) [user] subst_vars([_x], [_256852], [], ['_x'=_256852])
^  Exit: (259) [user] subst_vars([id, _x], [id, _256852], [], ['_x'=_256852])
^  Call: (259) [user] subst_vars([_x], _230720, ['_x'=_256852], _205524)
^  Unify: (259) [user] subst_vars([_x], [_x], ['_x'=_256852], ['_x'=_256852])
   Call: (260) [system] var([_x])
^  Redo: (259) [user] subst_vars([_x], _230720, ['_x'=_256852], _205524)
^  Unify: (259) [user] subst_vars([_x], [_283908|_283910], ['_x'=_256852], _205524)
^  Call: (260) [user] subst_vars(_x, _283908, ['_x'=_256852], _284848)
^  Unify: (260) [user] subst_vars(_x, _x, ['_x'=_256852], ['_x'=_256852])
   Call: (261) [system] var(_x)
^  Redo: (260) [user] subst_vars(_x, _283908, ['_x'=_256852], _284848)
^  Unify: (260) [user] subst_vars(_x, _283908, ['_x'=_256852], _284848)
   Call: (261) [system] nonvar('_x')
   Exit: (261) [system] nonvar('_x')
^  Call: (261) [user] svar_fixvarname_dont_capitalize('_x', _291366)
^  Unify: (261) [user] svar_fixvarname_dont_capitalize('_x', '_x')
^  Exit: (261) [user] svar_fixvarname_dont_capitalize('_x', '_x')
   Call: (261) [system] memberchk('_x'=_283908, ['_x'=_256852])
   Unify: (261) [system] memberchk('_x'=_283908, ['_x'=_256852])
   Call: (262) [system] nonvar([])
   Exit: (262) [system] nonvar([])
   Exit: (261) [system] memberchk('_x'=_256852, ['_x'=_256852])
   Call: (261) [system] _284848=['_x'=_256852]
   Exit: (261) [system] ['_x'=_256852]=['_x'=_256852]
^  Exit: (260) [user] subst_vars(_x, _256852, ['_x'=_256852], ['_x'=_256852])
^  Call: (260) [user] subst_vars([], _283910, ['_x'=_256852], _205524)
^  Unify: (260) [user] subst_vars([], [], ['_x'=_256852], ['_x'=_256852])
   Call: (261) [system] var([])
^  Redo: (260) [user] subst_vars([], _283910, ['_x'=_256852], _205524)
^  Unify: (260) [user] subst_vars([], [], ['_x'=_256852], ['_x'=_256852])
^  Exit: (260) [user] subst_vars([], [], ['_x'=_256852], ['_x'=_256852])
^  Exit: (259) [user] subst_vars([_x], [_256852], ['_x'=_256852], ['_x'=_256852])
^  Exit: (258) [user] subst_vars([[id, _x], _x], [[id, _256852], _256852], [], ['_x'=_256852])
^  Exit: (257) [user] subst_vars([=, [id, _x], _x], [=, [id, _256852], _256852], [], ['_x'=_256852])
   Call: (257) [system] _309996=metta_file_buffer(+, [=, [id, _256852], _256852], ['_x'=_256852], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(604, 20, 21, 604))
   Exit: (257) [system] metta_file_buffer(+, [=, [id, _256852], _256852], ['_x'=_256852], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(604, 20, 21, 604))=metta_file_buffer(+, [=, [id, _256852], _256852], ['_x'=_256852], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(604, 20, 21, 604))
^  Call: (257) [user] assertz(metta_file_buffer(+, [=, [id, _256852], _256852], ['_x'=_256852], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(604, 20, 21, 604)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, [=, [id, _256852], _256852], ['_x'=_256852], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(604, 20, 21, 604)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [=, [id, _256852], _256852], ['_x'=_256852], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(604, 20, 21, 604))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [=, [id, _256852], _256852], ['_x'=_256852], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(604, 20, 21, 604))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [=, [id, _256852], _256852], ['_x'=_256852], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(604, 20, 21, 604))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [=, [id, _256852], _256852], ['_x'=_256852], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(604, 20, 21, 604))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
   Redo: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _360790)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _361728))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _361728)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 619)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _360790)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _360790)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_360790))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_360790))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_360790))
   Exit: (259) [system] nonvar(position(_360790))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(619, 21, 14, 619)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(619, 21, 14, 619))
   Call: (257) [user] current_read_mode(file, _381208)
   Unify: (257) [user] current_read_mode(file, _381208)
   Call: (258) [system] nb_current(file_mode, _381208)
   Redo: (257) [user] current_read_mode(file, _381208)
   Call: (258) [system] _381208=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _387658)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _387658)
^  Call: (258) [user] clause(t_l:s_reader_info(_387658), _389604, _389526)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _387658)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _387658)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _387658)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _387658)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _387658)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _387658)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _387658)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _387658)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _403434)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (260) [system] char_type('\n', space)
   Exit: (260) [system] char_type('\n', space)
   Call: (260) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (260) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _387658)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _387658)
   Call: (261) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _387658)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _387658)
   Call: (261) [system] peek_char((0x55aefe44e2f0), _413640)
   Exit: (261) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (261) [system] char_type('\n', space)
   Exit: (261) [system] char_type('\n', space)
   Call: (261) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (261) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _387658)
^  Unify: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _387658)
   Call: (262) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _387658)
^  Unify: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _387658)
   Call: (262) [system] peek_char((0x55aefe44e2f0), _423846)
   Exit: (262) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (262) [system] char_type('(', space)
^  Redo: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _387658)
^  Unify: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _387658)
^  Call: (262) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (262) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (263) [system] string((0x55aefe44e2f0))
^  Redo: (262) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (262) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (262) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _387658)
^  Unify: (262) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _387658)
^  Call: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _387658)
^  Unify: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _387658)
   Call: (264) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _387658)
^  Unify: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _387658)
   Call: (264) [system] peek_char((0x55aefe44e2f0), _439600)
   Exit: (264) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (264) [system] char_type('(', space)
^  Redo: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _387658)
^  Unify: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _387658)
   Call: (264) [system] _444242=(0x55aefe44e2f0)
   Exit: (264) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (264) [user] once((read_position((0x55aefe44e2f0), _446110, _446112, _446114, _446116), read_sexpr((0x55aefe44e2f0), _446128), assertz(metta_file_comment(_446110, _446112, _446114, _446128, _446116))))
^  Unify: (264) [system] once(user:(read_position((0x55aefe44e2f0), _446110, _446112, _446114, _446116), read_sexpr((0x55aefe44e2f0), _446128), assertz(metta_file_comment(_446110, _446112, _446114, _446128, _446116))))
^  Call: (266) [user] read_position((0x55aefe44e2f0), _446110, _446112, _446114, _446116)
^  Unify: (266) [user] read_position((0x55aefe44e2f0), _446110, _446112, _446114, _446116)
   Call: (267) [system] stream_property((0x55aefe44e2f0), position(_446116))
   Unify: (267) [system] stream_property((0x55aefe44e2f0), position(_446116))
   Call: (268) [system] nonvar((0x55aefe44e2f0))
   Exit: (268) [system] nonvar((0x55aefe44e2f0))
   Call: (268) [system] nonvar(position(_446116))
   Exit: (268) [system] nonvar(position(_446116))
   Exit: (267) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(621, 23, 0, 621)))
   Call: (267) [$syspreds] stream_position_data(line_count, '$stream_position'(621, 23, 0, 621), _446110)
   Unify: (267) [$syspreds] stream_position_data(line_count, '$stream_position'(621, 23, 0, 621), _446110)
   Call: (268) [system] nonvar(line_count)
   Exit: (268) [system] nonvar(line_count)
   Call: (268) [$syspreds] stream_position_field(line_count, _460098)
   Unify: (268) [$syspreds] stream_position_field(line_count, 2)
   Exit: (268) [$syspreds] stream_position_field(line_count, 2)
   Call: (268) [system] arg(2, '$stream_position'(621, 23, 0, 621), _446110)
   Exit: (268) [system] arg(2, '$stream_position'(621, 23, 0, 621), 23)
   Exit: (267) [$syspreds] stream_position_data(line_count, '$stream_position'(621, 23, 0, 621), 23)
   Call: (267) [$syspreds] stream_position_data(line_position, '$stream_position'(621, 23, 0, 621), _446112)
   Unify: (267) [$syspreds] stream_position_data(line_position, '$stream_position'(621, 23, 0, 621), _446112)
   Call: (268) [system] nonvar(line_position)
   Exit: (268) [system] nonvar(line_position)
   Call: (268) [$syspreds] stream_position_field(line_position, _469392)
   Unify: (268) [$syspreds] stream_position_field(line_position, 3)
   Exit: (268) [$syspreds] stream_position_field(line_position, 3)
   Call: (268) [system] arg(3, '$stream_position'(621, 23, 0, 621), _446112)
   Exit: (268) [system] arg(3, '$stream_position'(621, 23, 0, 621), 0)
   Exit: (267) [$syspreds] stream_position_data(line_position, '$stream_position'(621, 23, 0, 621), 0)
   Call: (267) [$syspreds] stream_position_data(char_count, '$stream_position'(621, 23, 0, 621), _446114)
   Unify: (267) [$syspreds] stream_position_data(char_count, '$stream_position'(621, 23, 0, 621), _446114)
   Call: (268) [system] nonvar(char_count)
   Exit: (268) [system] nonvar(char_count)
   Call: (268) [$syspreds] stream_position_field(char_count, _478686)
   Unify: (268) [$syspreds] stream_position_field(char_count, 1)
   Exit: (268) [$syspreds] stream_position_field(char_count, 1)
   Call: (268) [system] arg(1, '$stream_position'(621, 23, 0, 621), _446114)
   Exit: (268) [system] arg(1, '$stream_position'(621, 23, 0, 621), 621)
   Exit: (267) [$syspreds] stream_position_data(char_count, '$stream_position'(621, 23, 0, 621), 621)
^  Exit: (266) [user] read_position((0x55aefe44e2f0), 23, 0, 621, '$stream_position'(621, 23, 0, 621))
^  Call: (266) [user] read_sexpr((0x55aefe44e2f0), _446128)
^  Unify: (266) [user] read_sexpr((0x55aefe44e2f0), _446128)
   Call: (267) [system] string((0x55aefe44e2f0))
^  Redo: (266) [user] read_sexpr((0x55aefe44e2f0), _446128)
^  Unify: (266) [user] read_sexpr((0x55aefe44e2f0), _446128)
^  Call: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), _446128)
^  Unify: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), _446128)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _493556)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (269) [system] '('=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', 'white')
^  Redo: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', end_of_line)
^  Redo: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', space)
^  Redo: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] get_char((0x55aefe44e2f0), _510340)
   Exit: (268) [system] get_char((0x55aefe44e2f0), '(')
   Call: (268) [system] '('='('
   Exit: (268) [system] '('='('
^  Call: (268) [user] read_list(')', (0x55aefe44e2f0), _446128)
^  Unify: (268) [user] read_list(')', (0x55aefe44e2f0), _446128)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _517766)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, 'white')
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, end_of_line)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, space)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, cntrl)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _16632)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)=')'
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _5944)
   Call: (269) [system] (:)=end_of_file
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _5944)
^  Call: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _22210)
^  Unify: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _22210)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _25924)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), :)
   Call: (271) [system] (:)=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(:)
^  Unify: (271) [user] is_like_space(:)
   Call: (272) [system] char_type(:, 'white')
^  Redo: (271) [user] is_like_space(:)
^  Unify: (271) [user] is_like_space(:)
   Call: (272) [system] char_type(:, end_of_line)
^  Redo: (271) [user] is_like_space(:)
^  Unify: (271) [user] is_like_space(:)
   Call: (272) [system] char_type(:, space)
^  Redo: (271) [user] is_like_space(:)
^  Unify: (271) [user] is_like_space(:)
   Call: (272) [system] char_type(:, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] get_char((0x55aefe44e2f0), _42708)
   Exit: (270) [system] get_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)='('
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _22210)
   Call: (270) [system] (:)='['
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _22210)
   Call: (270) [system] (:)='{'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _22210)
   Call: (270) [system] (:)='"'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _22210)
   Call: (270) [system] (:)=!
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _22210)
   Call: (270) [system] (:)='\''
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _22210)
   Call: (270) [system] (:)='`'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _22210)
   Call: (270) [system] (:)=end_of_file
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _22210)
^  Call: (270) [user] read_symbolic(')', (0x55aefe44e2f0), :, _22210)
^  Unify: (270) [user] read_symbolic(')', (0x55aefe44e2f0), :, _22210)
^  Call: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _61318)
^  Unify: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _61318)
   Call: (272) [system] peek_char((0x55aefe44e2f0), _63184)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (272) [user] is_delimiter(' ')
^  Unify: (272) [user] is_delimiter(' ')
   Call: (273) [system] char_type(' ', space)
   Exit: (273) [system] char_type(' ', space)
^  Exit: (272) [user] is_delimiter(' ')
   Call: (272) [system] _61318=[]
   Exit: (272) [system] []=[]
^  Exit: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (271) [user] classify_and_convert_charseq(:, [], _22210)
^  Unify: (271) [user] classify_and_convert_charseq(:, [], _22210)
^  Call: (273) [system] setup_call_cleanup('$notrace'(_74350, _74352), once(user:catch(read_from_chars([:], _22210), _74326, fail)), '$restore_trace'(_74350, _74352))
^  Unify: (273) [system] setup_call_cleanup(system:'$notrace'(_74350, _74352), system:once(user:catch(read_from_chars([:], _22210), _74326, fail)), system:'$restore_trace'(_74350, _74352))
^  Call: (274) [system] sig_atomic(system:'$notrace'(_74350, _74352))
^  Exit: (273) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([:], :), _74326, fail)), system:'$restore_trace'(3, -1))
   Call: (272) [system] atomic(:)
   Exit: (272) [system] atomic(:)
^  Exit: (271) [user] classify_and_convert_charseq(:, [], :)
^  Exit: (270) [user] read_symbolic(')', (0x55aefe44e2f0), :, :)
^  Exit: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), :)
^  Call: (269) [user] read_list(')', (0x55aefe44e2f0), _82788)
^  Unify: (269) [user] read_list(')', (0x55aefe44e2f0), _82788)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _86502)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (271) [system] ' '=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(' ')
^  Unify: (271) [user] is_like_space(' ')
   Call: (272) [system] char_type(' ', 'white')
   Exit: (272) [system] char_type(' ', 'white')
^  Exit: (271) [user] is_like_space(' ')
   Call: (271) [system] get_char((0x55aefe44e2f0), _95160)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _98788)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), a)
   Call: (272) [system] a=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(a)
^  Unify: (272) [user] is_like_space(a)
   Call: (273) [system] char_type(a, 'white')
^  Redo: (272) [user] is_like_space(a)
^  Unify: (272) [user] is_like_space(a)
   Call: (273) [system] char_type(a, end_of_line)
^  Redo: (272) [user] is_like_space(a)
^  Unify: (272) [user] is_like_space(a)
   Call: (273) [system] char_type(a, space)
^  Redo: (272) [user] is_like_space(a)
^  Unify: (272) [user] is_like_space(a)
   Call: (273) [system] char_type(a, cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _116496)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), a)
   Call: (270) [system] a=')'
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _82788)
   Call: (270) [system] a=end_of_file
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _82788)
^  Call: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _122074)
^  Unify: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _122074)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _125788)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), a)
   Call: (272) [system] a=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(a)
^  Unify: (272) [user] is_like_space(a)
   Call: (273) [system] char_type(a, 'white')
^  Redo: (272) [user] is_like_space(a)
^  Unify: (272) [user] is_like_space(a)
   Call: (273) [system] char_type(a, end_of_line)
^  Redo: (272) [user] is_like_space(a)
^  Unify: (272) [user] is_like_space(a)
   Call: (273) [system] char_type(a, space)
^  Redo: (272) [user] is_like_space(a)
^  Unify: (272) [user] is_like_space(a)
   Call: (273) [system] char_type(a, cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] get_char((0x55aefe44e2f0), _142572)
   Exit: (271) [system] get_char((0x55aefe44e2f0), a)
   Call: (271) [system] a='('
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _122074)
   Call: (271) [system] a='['
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _122074)
   Call: (271) [system] a='{'
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _122074)
   Call: (271) [system] a='"'
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _122074)
   Call: (271) [system] a=!
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _122074)
   Call: (271) [system] a='\''
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _122074)
   Call: (271) [system] a='`'
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _122074)
   Call: (271) [system] a=end_of_file
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _122074)
^  Call: (271) [user] read_symbolic(')', (0x55aefe44e2f0), a, _122074)
^  Unify: (271) [user] read_symbolic(')', (0x55aefe44e2f0), a, _122074)
^  Call: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _161182)
^  Unify: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _161182)
   Call: (273) [system] peek_char((0x55aefe44e2f0), _163048)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (273) [user] is_delimiter(p)
^  Unify: (273) [user] is_delimiter(p)
   Call: (274) [system] char_type(p, space)
^  Redo: (273) [user] is_delimiter(p)
   Call: (274) [system] arg(_168688, v('(', ')', end_of_file), p)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _161182)
   Call: (273) [system] ')'==p
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _161182)
   Call: (273) [system] get_char((0x55aefe44e2f0), p)
   Exit: (273) [system] get_char((0x55aefe44e2f0), p)
   Call: (273) [system] p=(\)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _161182)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _176054)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _176054)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _177920)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (274) [user] is_delimiter(p)
^  Unify: (274) [user] is_delimiter(p)
   Call: (275) [system] char_type(p, space)
^  Redo: (274) [user] is_delimiter(p)
   Call: (275) [system] arg(_183560, v('(', ')', end_of_file), p)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _176054)
   Call: (274) [system] ')'==p
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _176054)
   Call: (274) [system] get_char((0x55aefe44e2f0), p)
   Exit: (274) [system] get_char((0x55aefe44e2f0), p)
   Call: (274) [system] p=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _176054)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _190926)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _190926)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _192792)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (275) [user] is_delimiter(l)
^  Unify: (275) [user] is_delimiter(l)
   Call: (276) [system] char_type(l, space)
^  Redo: (275) [user] is_delimiter(l)
   Call: (276) [system] arg(_198432, v('(', ')', end_of_file), l)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _190926)
   Call: (275) [system] ')'==l
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _190926)
   Call: (275) [system] get_char((0x55aefe44e2f0), l)
   Exit: (275) [system] get_char((0x55aefe44e2f0), l)
   Call: (275) [system] l=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _190926)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _205798)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _205798)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _207664)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), y)
^  Call: (276) [user] is_delimiter(y)
^  Unify: (276) [user] is_delimiter(y)
   Call: (277) [system] char_type(y, space)
^  Redo: (276) [user] is_delimiter(y)
   Call: (277) [system] arg(_213304, v('(', ')', end_of_file), y)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _205798)
   Call: (276) [system] ')'==y
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _205798)
   Call: (276) [system] get_char((0x55aefe44e2f0), y)
   Exit: (276) [system] get_char((0x55aefe44e2f0), y)
   Call: (276) [system] y=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _205798)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _220670)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _220670)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _222536)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (277) [user] is_delimiter(' ')
^  Unify: (277) [user] is_delimiter(' ')
   Call: (278) [system] char_type(' ', space)
   Exit: (278) [system] char_type(' ', space)
^  Exit: (277) [user] is_delimiter(' ')
   Call: (277) [system] _220670=[]
   Exit: (277) [system] []=[]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (276) [system] _205798=[y]
   Exit: (276) [system] [y]=[y]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [y])
   Call: (275) [system] _190926=[l, y]
   Exit: (275) [system] [l, y]=[l, y]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l, y])
   Call: (274) [system] _176054=[p, l, y]
   Exit: (274) [system] [p, l, y]=[p, l, y]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, l, y])
   Call: (273) [system] _161182=[p, p, l, y]
   Exit: (273) [system] [p, p, l, y]=[p, p, l, y]
^  Exit: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, p, l, y])
^  Call: (272) [user] classify_and_convert_charseq(a, [p, p, l, y], _122074)
^  Unify: (272) [user] classify_and_convert_charseq(a, [p, p, l, y], _122074)
^  Call: (274) [system] setup_call_cleanup('$notrace'(_244878, _244880), once(user:catch(read_from_chars([a, p, p, l, y], _122074), _244854, fail)), '$restore_trace'(_244878, _244880))
^  Unify: (274) [system] setup_call_cleanup(system:'$notrace'(_244878, _244880), system:once(user:catch(read_from_chars([a, p, p, l, y], _122074), _244854, fail)), system:'$restore_trace'(_244878, _244880))
^  Call: (275) [system] sig_atomic(system:'$notrace'(_244878, _244880))
^  Exit: (274) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([a, p, p, l, y], apply), _244854, fail)), system:'$restore_trace'(3, -1))
   Call: (273) [system] atomic(apply)
   Exit: (273) [system] atomic(apply)
^  Exit: (272) [user] classify_and_convert_charseq(a, [p, p, l, y], apply)
^  Exit: (271) [user] read_symbolic(')', (0x55aefe44e2f0), a, apply)
^  Exit: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), apply)
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _253316)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _253316)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _257030)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (272) [system] ' '=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(' ')
^  Unify: (272) [user] is_like_space(' ')
   Call: (273) [system] char_type(' ', 'white')
   Exit: (273) [system] char_type(' ', 'white')
^  Exit: (272) [user] is_like_space(' ')
   Call: (272) [system] get_char((0x55aefe44e2f0), _265688)
   Exit: (272) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _269316)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (273) [system] '('=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', 'white')
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', end_of_line)
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', space)
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _287024)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('=')'
^  Redo: (270) [user] read_list(')', (0x55aefe44e2f0), _253316)
   Call: (271) [system] '('=end_of_file
^  Redo: (270) [user] read_list(')', (0x55aefe44e2f0), _253316)
^  Call: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _292602)
^  Unify: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _292602)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _296316)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (273) [system] '('=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', 'white')
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', end_of_line)
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', space)
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] get_char((0x55aefe44e2f0), _313100)
   Exit: (272) [system] get_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('='('
   Exit: (272) [system] '('='('
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _292602)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _292602)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _320526)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, 'white')
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, end_of_line)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, space)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _337310)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _292602)
   Call: (273) [system] (-)=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _292602)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _342888)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _342888)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _346602)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), -)
   Call: (275) [system] (-)=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(-)
^  Unify: (275) [user] is_like_space(-)
   Call: (276) [system] char_type(-, 'white')
^  Redo: (275) [user] is_like_space(-)
^  Unify: (275) [user] is_like_space(-)
   Call: (276) [system] char_type(-, end_of_line)
^  Redo: (275) [user] is_like_space(-)
^  Unify: (275) [user] is_like_space(-)
   Call: (276) [system] char_type(-, space)
^  Redo: (275) [user] is_like_space(-)
^  Unify: (275) [user] is_like_space(-)
   Call: (276) [system] char_type(-, cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _363386)
   Exit: (274) [system] get_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)='('
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _342888)
   Call: (274) [system] (-)='['
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _342888)
   Call: (274) [system] (-)='{'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _342888)
   Call: (274) [system] (-)='"'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _342888)
   Call: (274) [system] (-)=!
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _342888)
   Call: (274) [system] (-)='\''
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _342888)
   Call: (274) [system] (-)='`'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _342888)
   Call: (274) [system] (-)=end_of_file
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _342888)
^  Call: (274) [user] read_symbolic(')', (0x55aefe44e2f0), -, _342888)
^  Unify: (274) [user] read_symbolic(')', (0x55aefe44e2f0), -, _342888)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _381996)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _381996)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _383862)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), >)
^  Call: (276) [user] is_delimiter(>)
^  Unify: (276) [user] is_delimiter(>)
   Call: (277) [system] char_type(>, space)
^  Redo: (276) [user] is_delimiter(>)
   Call: (277) [system] arg(_389502, v('(', ')', end_of_file), >)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _381996)
   Call: (276) [system] ')'==(>)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _381996)
   Call: (276) [system] get_char((0x55aefe44e2f0), >)
   Exit: (276) [system] get_char((0x55aefe44e2f0), >)
   Call: (276) [system] (>)=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _381996)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _396868)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _396868)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _398734)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (277) [user] is_delimiter(' ')
^  Unify: (277) [user] is_delimiter(' ')
   Call: (278) [system] char_type(' ', space)
   Exit: (278) [system] char_type(' ', space)
^  Exit: (277) [user] is_delimiter(' ')
   Call: (277) [system] _396868=[]
   Exit: (277) [system] []=[]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (276) [system] _381996=[>]
   Exit: (276) [system] [>]=[>]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [>])
^  Call: (275) [user] classify_and_convert_charseq(-, [>], _342888)
^  Unify: (275) [user] classify_and_convert_charseq(-, [>], _342888)
^  Call: (277) [system] setup_call_cleanup('$notrace'(_412694, _412696), once(user:catch(read_from_chars([-, >], _342888), _412670, fail)), '$restore_trace'(_412694, _412696))
^  Unify: (277) [system] setup_call_cleanup(system:'$notrace'(_412694, _412696), system:once(user:catch(read_from_chars([-, >], _342888), _412670, fail)), system:'$restore_trace'(_412694, _412696))
^  Call: (278) [system] sig_atomic(system:'$notrace'(_412694, _412696))
^  Exit: (277) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([-, >], ->), _412670, fail)), system:'$restore_trace'(3, -1))
   Call: (276) [system] atomic(->)
   Exit: (276) [system] atomic(->)
^  Exit: (275) [user] classify_and_convert_charseq(-, [>], ->)
^  Exit: (274) [user] read_symbolic(')', (0x55aefe44e2f0), -, ->)
^  Exit: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), ->)
^  Call: (273) [user] read_list(')', (0x55aefe44e2f0), _421132)
^  Unify: (273) [user] read_list(')', (0x55aefe44e2f0), _421132)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _424846)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (275) [system] ' '=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(' ')
^  Unify: (275) [user] is_like_space(' ')
   Call: (276) [system] char_type(' ', 'white')
   Exit: (276) [system] char_type(' ', 'white')
^  Exit: (275) [user] is_like_space(' ')
   Call: (275) [system] get_char((0x55aefe44e2f0), _433504)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _437132)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _454840)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (274) [system] 'A'=')'
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _421132)
   Call: (274) [system] 'A'=end_of_file
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _421132)
^  Call: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _460418)
^  Unify: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _460418)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _464132)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] get_char((0x55aefe44e2f0), _480916)
   Exit: (275) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'='('
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _460418)
   Call: (275) [system] 'A'='['
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _460418)
   Call: (275) [system] 'A'='{'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _460418)
   Call: (275) [system] 'A'='"'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _460418)
   Call: (275) [system] 'A'=!
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _460418)
   Call: (275) [system] 'A'='\''
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _460418)
   Call: (275) [system] 'A'='`'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _460418)
   Call: (275) [system] 'A'=end_of_file
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _460418)
^  Call: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _460418)
^  Unify: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _460418)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _499526)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _499526)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _501392)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (277) [user] is_delimiter(t)
^  Unify: (277) [user] is_delimiter(t)
   Call: (278) [system] char_type(t, space)
^  Redo: (277) [user] is_delimiter(t)
   Call: (278) [system] arg(_507032, v('(', ')', end_of_file), t)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _499526)
   Call: (277) [system] ')'==t
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _499526)
   Call: (277) [system] get_char((0x55aefe44e2f0), t)
   Exit: (277) [system] get_char((0x55aefe44e2f0), t)
   Call: (277) [system] t=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _499526)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _514398)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _514398)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _516264)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (278) [user] is_delimiter(o)
^  Unify: (278) [user] is_delimiter(o)
   Call: (279) [system] char_type(o, space)
^  Redo: (278) [user] is_delimiter(o)
   Call: (279) [system] arg(_521904, v('(', ')', end_of_file), o)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _514398)
   Call: (278) [system] ')'==o
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6014)
   Call: (278) [system] get_char((0x55aefe44e2f0), o)
   Exit: (278) [system] get_char((0x55aefe44e2f0), o)
   Call: (278) [system] o=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6014)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _11338)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _11338)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _13204)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (279) [user] is_delimiter(m)
^  Unify: (279) [user] is_delimiter(m)
   Call: (280) [system] char_type(m, space)
^  Redo: (279) [user] is_delimiter(m)
   Call: (280) [system] arg(_18844, v('(', ')', end_of_file), m)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _11338)
   Call: (279) [system] ')'==m
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _11338)
   Call: (279) [system] get_char((0x55aefe44e2f0), m)
   Exit: (279) [system] get_char((0x55aefe44e2f0), m)
   Call: (279) [system] m=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _11338)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _26210)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _26210)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _28076)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (280) [user] is_delimiter(' ')
^  Unify: (280) [user] is_delimiter(' ')
   Call: (281) [system] char_type(' ', space)
   Exit: (281) [system] char_type(' ', space)
^  Exit: (280) [user] is_delimiter(' ')
   Call: (280) [system] _26210=[]
   Exit: (280) [system] []=[]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (279) [system] _11338=[m]
   Exit: (279) [system] [m]=[m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (278) [system] _6014=[o, m]
   Exit: (278) [system] [o, m]=[o, m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (277) [system] _6010=[t, o, m]
   Exit: (277) [system] [t, o, m]=[t, o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (276) [user] classify_and_convert_charseq('A', [t, o, m], _6006)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _6006)
^  Call: (278) [system] setup_call_cleanup('$notrace'(_47624, _47626), once(user:catch(read_from_chars(['A', t, o, m], _6006), _47600, fail)), '$restore_trace'(_47624, _47626))
^  Unify: (278) [system] setup_call_cleanup(system:'$notrace'(_47624, _47626), system:once(user:catch(read_from_chars(['A', t, o, m], _6006), _47600, fail)), system:'$restore_trace'(_47624, _47626))
^  Call: (279) [system] sig_atomic(system:'$notrace'(_47624, _47626))
^  Exit: (278) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _6006), _47600, fail)), system:'$restore_trace'(3, -1))
   Call: (277) [system] atomic(_6006)
^  Redo: (276) [user] classify_and_convert_charseq('A', [t, o, m], _6006)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _6006)
   Call: (277) [system] atom_chars(_6006, ['A', t, o, m])
   Exit: (277) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (276) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _58878)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _58878)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _62592)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (276) [system] ' '=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(' ')
^  Unify: (276) [user] is_like_space(' ')
   Call: (277) [system] char_type(' ', 'white')
   Exit: (277) [system] char_type(' ', 'white')
^  Exit: (276) [user] is_like_space(' ')
   Call: (276) [system] get_char((0x55aefe44e2f0), _71250)
   Exit: (276) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _74878)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'V')
   Call: (277) [system] 'V'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space('V')
^  Unify: (277) [user] is_like_space('V')
   Call: (278) [system] char_type('V', 'white')
^  Redo: (277) [user] is_like_space('V')
^  Unify: (277) [user] is_like_space('V')
   Call: (278) [system] char_type('V', end_of_line)
^  Redo: (277) [user] is_like_space('V')
^  Unify: (277) [user] is_like_space('V')
   Call: (278) [system] char_type('V', space)
^  Redo: (277) [user] is_like_space('V')
^  Unify: (277) [user] is_like_space('V')
   Call: (278) [system] char_type('V', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _92586)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'V')
   Call: (275) [system] 'V'=')'
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _58878)
   Call: (275) [system] 'V'=end_of_file
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _58878)
^  Call: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _98164)
^  Unify: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _98164)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _101878)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'V')
   Call: (277) [system] 'V'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space('V')
^  Unify: (277) [user] is_like_space('V')
   Call: (278) [system] char_type('V', 'white')
^  Redo: (277) [user] is_like_space('V')
^  Unify: (277) [user] is_like_space('V')
   Call: (278) [system] char_type('V', end_of_line)
^  Redo: (277) [user] is_like_space('V')
^  Unify: (277) [user] is_like_space('V')
   Call: (278) [system] char_type('V', space)
^  Redo: (277) [user] is_like_space('V')
^  Unify: (277) [user] is_like_space('V')
   Call: (278) [system] char_type('V', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] get_char((0x55aefe44e2f0), _118662)
   Exit: (276) [system] get_char((0x55aefe44e2f0), 'V')
   Call: (276) [system] 'V'='('
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _98164)
   Call: (276) [system] 'V'='['
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _98164)
   Call: (276) [system] 'V'='{'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _98164)
   Call: (276) [system] 'V'='"'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _98164)
   Call: (276) [system] 'V'=!
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _98164)
   Call: (276) [system] 'V'='\''
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _98164)
   Call: (276) [system] 'V'='`'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _98164)
   Call: (276) [system] 'V'=end_of_file
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _98164)
^  Call: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'V', _98164)
^  Unify: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'V', _98164)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137272)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137272)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _139138)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (278) [user] is_delimiter(a)
^  Unify: (278) [user] is_delimiter(a)
   Call: (279) [system] char_type(a, space)
^  Redo: (278) [user] is_delimiter(a)
   Call: (279) [system] arg(_144778, v('(', ')', end_of_file), a)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137272)
   Call: (278) [system] ')'==a
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137272)
   Call: (278) [system] get_char((0x55aefe44e2f0), a)
   Exit: (278) [system] get_char((0x55aefe44e2f0), a)
   Call: (278) [system] a=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137272)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152144)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152144)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _154010)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (279) [user] is_delimiter(r)
^  Unify: (279) [user] is_delimiter(r)
   Call: (280) [system] char_type(r, space)
^  Redo: (279) [user] is_delimiter(r)
   Call: (280) [system] arg(_159650, v('(', ')', end_of_file), r)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152144)
   Call: (279) [system] ')'==r
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152144)
   Call: (279) [system] get_char((0x55aefe44e2f0), r)
   Exit: (279) [system] get_char((0x55aefe44e2f0), r)
   Call: (279) [system] r=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152144)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _167016)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _167016)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _168882)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (280) [user] is_delimiter(i)
^  Unify: (280) [user] is_delimiter(i)
   Call: (281) [system] char_type(i, space)
^  Redo: (280) [user] is_delimiter(i)
   Call: (281) [system] arg(_174522, v('(', ')', end_of_file), i)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _167016)
   Call: (280) [system] ')'==i
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _167016)
   Call: (280) [system] get_char((0x55aefe44e2f0), i)
   Exit: (280) [system] get_char((0x55aefe44e2f0), i)
   Call: (280) [system] i=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _167016)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _181888)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _181888)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _183754)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (281) [user] is_delimiter(a)
^  Unify: (281) [user] is_delimiter(a)
   Call: (282) [system] char_type(a, space)
^  Redo: (281) [user] is_delimiter(a)
   Call: (282) [system] arg(_189394, v('(', ')', end_of_file), a)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _181888)
   Call: (281) [system] ')'==a
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _181888)
   Call: (281) [system] get_char((0x55aefe44e2f0), a)
   Exit: (281) [system] get_char((0x55aefe44e2f0), a)
   Call: (281) [system] a=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _181888)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _196760)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _196760)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _198626)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), b)
^  Call: (282) [user] is_delimiter(b)
^  Unify: (282) [user] is_delimiter(b)
   Call: (283) [system] char_type(b, space)
^  Redo: (282) [user] is_delimiter(b)
   Call: (283) [system] arg(_204266, v('(', ')', end_of_file), b)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _196760)
   Call: (282) [system] ')'==b
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _196760)
   Call: (282) [system] get_char((0x55aefe44e2f0), b)
   Exit: (282) [system] get_char((0x55aefe44e2f0), b)
   Call: (282) [system] b=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _196760)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _211632)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _211632)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _213498)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (283) [user] is_delimiter(l)
^  Unify: (283) [user] is_delimiter(l)
   Call: (284) [system] char_type(l, space)
^  Redo: (283) [user] is_delimiter(l)
   Call: (284) [system] arg(_219138, v('(', ')', end_of_file), l)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _211632)
   Call: (283) [system] ')'==l
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _211632)
   Call: (283) [system] get_char((0x55aefe44e2f0), l)
   Exit: (283) [system] get_char((0x55aefe44e2f0), l)
   Call: (283) [system] l=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _211632)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _226504)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _226504)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _228370)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (284) [user] is_delimiter(e)
^  Unify: (284) [user] is_delimiter(e)
   Call: (285) [system] char_type(e, space)
^  Redo: (284) [user] is_delimiter(e)
   Call: (285) [system] arg(_234010, v('(', ')', end_of_file), e)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _226504)
   Call: (284) [system] ')'==e
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _226504)
   Call: (284) [system] get_char((0x55aefe44e2f0), e)
   Exit: (284) [system] get_char((0x55aefe44e2f0), e)
   Call: (284) [system] e=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _226504)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _241376)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _241376)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _243242)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (285) [user] is_delimiter(' ')
^  Unify: (285) [user] is_delimiter(' ')
   Call: (286) [system] char_type(' ', space)
   Exit: (286) [system] char_type(' ', space)
^  Exit: (285) [user] is_delimiter(' ')
   Call: (285) [system] _241376=[]
   Exit: (285) [system] []=[]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (284) [system] _226504=[e]
   Exit: (284) [system] [e]=[e]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e])
   Call: (283) [system] _211632=[l, e]
   Exit: (283) [system] [l, e]=[l, e]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l, e])
   Call: (282) [system] _196760=[b, l, e]
   Exit: (282) [system] [b, l, e]=[b, l, e]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [b, l, e])
   Call: (281) [system] _181888=[a, b, l, e]
   Exit: (281) [system] [a, b, l, e]=[a, b, l, e]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, b, l, e])
   Call: (280) [system] _167016=[i, a, b, l, e]
   Exit: (280) [system] [i, a, b, l, e]=[i, a, b, l, e]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, a, b, l, e])
   Call: (279) [system] _152144=[r, i, a, b, l, e]
   Exit: (279) [system] [r, i, a, b, l, e]=[r, i, a, b, l, e]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, i, a, b, l, e])
   Call: (278) [system] _137272=[a, r, i, a, b, l, e]
   Exit: (278) [system] [a, r, i, a, b, l, e]=[a, r, i, a, b, l, e]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, r, i, a, b, l, e])
^  Call: (277) [user] classify_and_convert_charseq('V', [a, r, i, a, b, l, e], _98164)
^  Unify: (277) [user] classify_and_convert_charseq('V', [a, r, i, a, b, l, e], _98164)
^  Call: (279) [system] setup_call_cleanup('$notrace'(_273966, _273968), once(user:catch(read_from_chars(['V', a, r, i, a, b, l, e], _98164), _273942, fail)), '$restore_trace'(_273966, _273968))
^  Unify: (279) [system] setup_call_cleanup(system:'$notrace'(_273966, _273968), system:once(user:catch(read_from_chars(['V', a, r, i, a, b, l, e], _98164), _273942, fail)), system:'$restore_trace'(_273966, _273968))
^  Call: (280) [system] sig_atomic(system:'$notrace'(_273966, _273968))
^  Exit: (279) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['V', a, r, i, a, b, l, e], _98164), _273942, fail)), system:'$restore_trace'(3, -1))
   Call: (278) [system] atomic(_98164)
^  Redo: (277) [user] classify_and_convert_charseq('V', [a, r, i, a, b, l, e], _98164)
^  Unify: (277) [user] classify_and_convert_charseq('V', [a, r, i, a, b, l, e], _98164)
   Call: (278) [system] atom_chars(_98164, ['V', a, r, i, a, b, l, e])
   Exit: (278) [system] atom_chars('Variable', ['V', a, r, i, a, b, l, e])
^  Exit: (277) [user] classify_and_convert_charseq('V', [a, r, i, a, b, l, e], 'Variable')
^  Exit: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'V', 'Variable')
^  Exit: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Variable')
^  Call: (275) [user] read_list(')', (0x55aefe44e2f0), _285220)
^  Unify: (275) [user] read_list(')', (0x55aefe44e2f0), _285220)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _288934)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (277) [system] ' '=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space(' ')
^  Unify: (277) [user] is_like_space(' ')
   Call: (278) [system] char_type(' ', 'white')
   Exit: (278) [system] char_type(' ', 'white')
^  Exit: (277) [user] is_like_space(' ')
   Call: (277) [system] get_char((0x55aefe44e2f0), _297592)
   Exit: (277) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _301220)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (278) [system] 'A'=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', 'white')
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', end_of_line)
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', space)
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', cntrl)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _318928)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=')'
^  Redo: (275) [user] read_list(')', (0x55aefe44e2f0), _285220)
   Call: (276) [system] 'A'=end_of_file
^  Redo: (275) [user] read_list(')', (0x55aefe44e2f0), _285220)
^  Call: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _324506)
^  Unify: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _324506)
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _328220)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (278) [system] 'A'=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', 'white')
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', end_of_line)
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', space)
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', cntrl)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] get_char((0x55aefe44e2f0), _345004)
   Exit: (277) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (277) [system] 'A'='('
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _324506)
   Call: (277) [system] 'A'='['
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _324506)
   Call: (277) [system] 'A'='{'
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _324506)
   Call: (277) [system] 'A'='"'
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _324506)
   Call: (277) [system] 'A'=!
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _324506)
   Call: (277) [system] 'A'='\''
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _324506)
   Call: (277) [system] 'A'='`'
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _324506)
   Call: (277) [system] 'A'=end_of_file
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _324506)
^  Call: (277) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _324506)
^  Unify: (277) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _324506)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _363614)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _363614)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _365480)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (279) [user] is_delimiter(t)
^  Unify: (279) [user] is_delimiter(t)
   Call: (280) [system] char_type(t, space)
^  Redo: (279) [user] is_delimiter(t)
   Call: (280) [system] arg(_371120, v('(', ')', end_of_file), t)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _363614)
   Call: (279) [system] ')'==t
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _363614)
   Call: (279) [system] get_char((0x55aefe44e2f0), t)
   Exit: (279) [system] get_char((0x55aefe44e2f0), t)
   Call: (279) [system] t=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _363614)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _378486)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _378486)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _380352)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (280) [user] is_delimiter(o)
^  Unify: (280) [user] is_delimiter(o)
   Call: (281) [system] char_type(o, space)
^  Redo: (280) [user] is_delimiter(o)
   Call: (281) [system] arg(_385992, v('(', ')', end_of_file), o)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _378486)
   Call: (280) [system] ')'==o
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _378486)
   Call: (280) [system] get_char((0x55aefe44e2f0), o)
   Exit: (280) [system] get_char((0x55aefe44e2f0), o)
   Call: (280) [system] o=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _378486)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _393358)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _393358)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _395224)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (281) [user] is_delimiter(m)
^  Unify: (281) [user] is_delimiter(m)
   Call: (282) [system] char_type(m, space)
^  Redo: (281) [user] is_delimiter(m)
   Call: (282) [system] arg(_400864, v('(', ')', end_of_file), m)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _393358)
   Call: (281) [system] ')'==m
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _393358)
   Call: (281) [system] get_char((0x55aefe44e2f0), m)
   Exit: (281) [system] get_char((0x55aefe44e2f0), m)
   Call: (281) [system] m=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _393358)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _408230)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _408230)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _410096)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (282) [user] is_delimiter(' ')
^  Unify: (282) [user] is_delimiter(' ')
   Call: (283) [system] char_type(' ', space)
   Exit: (283) [system] char_type(' ', space)
^  Exit: (282) [user] is_delimiter(' ')
   Call: (282) [system] _408230=[]
   Exit: (282) [system] []=[]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (281) [system] _393358=[m]
   Exit: (281) [system] [m]=[m]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (280) [system] _378486=[o, m]
   Exit: (280) [system] [o, m]=[o, m]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (279) [system] _363614=[t, o, m]
   Exit: (279) [system] [t, o, m]=[t, o, m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (278) [user] classify_and_convert_charseq('A', [t, o, m], _324506)
^  Unify: (278) [user] classify_and_convert_charseq('A', [t, o, m], _324506)
^  Call: (280) [system] setup_call_cleanup('$notrace'(_429644, _429646), once(user:catch(read_from_chars(['A', t, o, m], _324506), _429620, fail)), '$restore_trace'(_429644, _429646))
^  Unify: (280) [system] setup_call_cleanup(system:'$notrace'(_429644, _429646), system:once(user:catch(read_from_chars(['A', t, o, m], _324506), _429620, fail)), system:'$restore_trace'(_429644, _429646))
^  Call: (281) [system] sig_atomic(system:'$notrace'(_429644, _429646))
^  Exit: (280) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _324506), _429620, fail)), system:'$restore_trace'(3, -1))
   Call: (279) [system] atomic(_324506)
^  Redo: (278) [user] classify_and_convert_charseq('A', [t, o, m], _324506)
^  Unify: (278) [user] classify_and_convert_charseq('A', [t, o, m], _324506)
   Call: (279) [system] atom_chars(_324506, ['A', t, o, m])
   Exit: (279) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (278) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (277) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (276) [user] read_list(')', (0x55aefe44e2f0), _440898)
^  Unify: (276) [user] read_list(')', (0x55aefe44e2f0), _440898)
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _444612)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (278) [system] ' '=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space(' ')
^  Unify: (278) [user] is_like_space(' ')
   Call: (279) [system] char_type(' ', 'white')
   Exit: (279) [system] char_type(' ', 'white')
^  Exit: (278) [user] is_like_space(' ')
   Call: (278) [system] get_char((0x55aefe44e2f0), _453270)
   Exit: (278) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _456898)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (279) [system] 'A'=(;)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', 'white')
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', end_of_line)
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', space)
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', cntrl)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _474606)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (277) [system] 'A'=')'
^  Redo: (276) [user] read_list(')', (0x55aefe44e2f0), _440898)
   Call: (277) [system] 'A'=end_of_file
^  Redo: (276) [user] read_list(')', (0x55aefe44e2f0), _440898)
^  Call: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _480184)
^  Unify: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _480184)
^  Call: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _483898)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (279) [system] 'A'=(;)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', 'white')
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', end_of_line)
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', space)
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', cntrl)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] get_char((0x55aefe44e2f0), _500682)
   Exit: (278) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (278) [system] 'A'='('
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _480184)
   Call: (278) [system] 'A'='['
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _480184)
   Call: (278) [system] 'A'='{'
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _480184)
   Call: (278) [system] 'A'='"'
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _480184)
   Call: (278) [system] 'A'=!
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _480184)
   Call: (278) [system] 'A'='\''
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _480184)
   Call: (278) [system] 'A'='`'
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _480184)
   Call: (278) [system] 'A'=end_of_file
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _480184)
^  Call: (278) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _480184)
^  Unify: (278) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _480184)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _519292)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _519292)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _521158)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (280) [user] is_delimiter(t)
^  Unify: (280) [user] is_delimiter(t)
   Call: (281) [system] char_type(t, space)
^  Redo: (280) [user] is_delimiter(t)
   Call: (281) [system] arg(_8834, v('(', ')', end_of_file), t)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6028)
   Call: (280) [system] ')'==t
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6028)
   Call: (280) [system] get_char((0x55aefe44e2f0), t)
   Exit: (280) [system] get_char((0x55aefe44e2f0), t)
   Call: (280) [system] t=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6028)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _16200)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _16200)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _18066)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (281) [user] is_delimiter(o)
^  Unify: (281) [user] is_delimiter(o)
   Call: (282) [system] char_type(o, space)
^  Redo: (281) [user] is_delimiter(o)
   Call: (282) [system] arg(_23706, v('(', ')', end_of_file), o)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _16200)
   Call: (281) [system] ')'==o
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _16200)
   Call: (281) [system] get_char((0x55aefe44e2f0), o)
   Exit: (281) [system] get_char((0x55aefe44e2f0), o)
   Call: (281) [system] o=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _16200)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31072)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31072)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _32938)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (282) [user] is_delimiter(m)
^  Unify: (282) [user] is_delimiter(m)
   Call: (283) [system] char_type(m, space)
^  Redo: (282) [user] is_delimiter(m)
   Call: (283) [system] arg(_38578, v('(', ')', end_of_file), m)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31072)
   Call: (282) [system] ')'==m
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31072)
   Call: (282) [system] get_char((0x55aefe44e2f0), m)
   Exit: (282) [system] get_char((0x55aefe44e2f0), m)
   Call: (282) [system] m=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31072)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _45944)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _45944)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _47810)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (283) [user] is_delimiter(')')
^  Unify: (283) [user] is_delimiter(')')
   Call: (284) [system] char_type(')', space)
^  Redo: (283) [user] is_delimiter(')')
   Call: (284) [system] arg(_53450, v('(', ')', end_of_file), ')')
   Exit: (284) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (283) [user] is_delimiter(')')
   Call: (283) [system] _45944=[]
   Exit: (283) [system] []=[]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (282) [system] _31072=[m]
   Exit: (282) [system] [m]=[m]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (281) [system] _16200=[o, m]
   Exit: (281) [system] [o, m]=[o, m]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (280) [system] _6028=[t, o, m]
   Exit: (280) [system] [t, o, m]=[t, o, m]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (279) [user] classify_and_convert_charseq('A', [t, o, m], _6024)
^  Unify: (279) [user] classify_and_convert_charseq('A', [t, o, m], _6024)
^  Call: (281) [system] setup_call_cleanup('$notrace'(_69226, _69228), once(user:catch(read_from_chars(['A', t, o, m], _6024), _69202, fail)), '$restore_trace'(_69226, _69228))
^  Unify: (281) [system] setup_call_cleanup(system:'$notrace'(_69226, _69228), system:once(user:catch(read_from_chars(['A', t, o, m], _6024), _69202, fail)), system:'$restore_trace'(_69226, _69228))
^  Call: (282) [system] sig_atomic(system:'$notrace'(_69226, _69228))
^  Exit: (281) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _6024), _69202, fail)), system:'$restore_trace'(3, -1))
   Call: (280) [system] atomic(_6024)
^  Redo: (279) [user] classify_and_convert_charseq('A', [t, o, m], _6024)
^  Unify: (279) [user] classify_and_convert_charseq('A', [t, o, m], _6024)
   Call: (280) [system] atom_chars(_6024, ['A', t, o, m])
   Exit: (280) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (279) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (278) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (277) [user] read_list(')', (0x55aefe44e2f0), _80480)
^  Unify: (277) [user] read_list(')', (0x55aefe44e2f0), _80480)
^  Call: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _84194)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (279) [system] ')'=(;)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (279) [user] is_like_space(')')
^  Unify: (279) [user] is_like_space(')')
   Call: (280) [system] char_type(')', 'white')
^  Redo: (279) [user] is_like_space(')')
^  Unify: (279) [user] is_like_space(')')
   Call: (280) [system] char_type(')', end_of_line)
^  Redo: (279) [user] is_like_space(')')
^  Unify: (279) [user] is_like_space(')')
   Call: (280) [system] char_type(')', space)
^  Redo: (279) [user] is_like_space(')')
^  Unify: (279) [user] is_like_space(')')
   Call: (280) [system] char_type(')', cntrl)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _100978)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (278) [system] ')'=')'
   Exit: (278) [system] ')'=')'
   Call: (278) [system] get_char((0x55aefe44e2f0), _104768)
   Exit: (278) [system] get_char((0x55aefe44e2f0), ')')
   Call: (278) [system] _80480=[]
   Exit: (278) [system] []=[]
^  Exit: (277) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (277) [system] _6020=['Atom']
   Exit: (277) [system] ['Atom']=['Atom']
^  Exit: (276) [user] read_list(')', (0x55aefe44e2f0), ['Atom'])
   Call: (276) [system] _6014=['Atom', 'Atom']
   Exit: (276) [system] ['Atom', 'Atom']=['Atom', 'Atom']
^  Exit: (275) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Atom'])
   Call: (275) [system] _6008=['Variable', 'Atom', 'Atom']
   Exit: (275) [system] ['Variable', 'Atom', 'Atom']=['Variable', 'Atom', 'Atom']
^  Exit: (274) [user] read_list(')', (0x55aefe44e2f0), ['Variable', 'Atom', 'Atom'])
   Call: (274) [system] _6002=['Atom', 'Variable', 'Atom', 'Atom']
   Exit: (274) [system] ['Atom', 'Variable', 'Atom', 'Atom']=['Atom', 'Variable', 'Atom', 'Atom']
^  Exit: (273) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Variable', 'Atom', 'Atom'])
   Call: (273) [system] _5994=[->, 'Atom', 'Variable', 'Atom', 'Atom']
   Exit: (273) [system] [->, 'Atom', 'Variable', 'Atom', 'Atom']=[->, 'Atom', 'Variable', 'Atom', 'Atom']
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), [->, 'Atom', 'Variable', 'Atom', 'Atom'])
^  Exit: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), [->, 'Atom', 'Variable', 'Atom', 'Atom'])
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _124238)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _124238)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _127952)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (273) [system] ')'=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', 'white')
^  Redo: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', end_of_line)
^  Redo: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', space)
^  Redo: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _144736)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (272) [system] ')'=')'
   Exit: (272) [system] ')'=')'
   Call: (272) [system] get_char((0x55aefe44e2f0), _148526)
   Exit: (272) [system] get_char((0x55aefe44e2f0), ')')
   Call: (272) [system] _124238=[]
   Exit: (272) [system] []=[]
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (271) [system] _5990=[[->, 'Atom', 'Variable', 'Atom', 'Atom']]
   Exit: (271) [system] [[->, 'Atom', 'Variable', 'Atom', 'Atom']]=[[->, 'Atom', 'Variable', 'Atom', 'Atom']]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [[->, 'Atom', 'Variable', 'Atom', 'Atom']])
   Call: (270) [system] _5984=[apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]
   Exit: (270) [system] [apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]=[apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]
^  Exit: (269) [user] read_list(')', (0x55aefe44e2f0), [apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
   Call: (269) [system] _5944=[:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]
   Exit: (269) [system] [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]=[:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]
^  Exit: (268) [user] read_list(')', (0x55aefe44e2f0), [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (266) [user] read_sexpr((0x55aefe44e2f0), [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Call: (266) [user] assertz(metta_file_comment(23, 0, 621, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], '$stream_position'(621, 23, 0, 621)))
^  Exit: (266) [user] assertz(metta_file_comment(23, 0, 621, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], '$stream_position'(621, 23, 0, 621)))
^  Exit: (264) [system] once(user:(read_position((0x55aefe44e2f0), 23, 0, 621, '$stream_position'(621, 23, 0, 621)), read_sexpr((0x55aefe44e2f0), [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]), assertz(metta_file_comment(23, 0, 621, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], '$stream_position'(621, 23, 0, 621)))))
   Call: (264) [system] fail
^  Redo: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Unify: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Call: (264) [user] retract(metta_file_comment(_168900, _168902, _168904, _168906, _168908))
^  Exit: (264) [user] retract(metta_file_comment(23, 0, 621, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], '$stream_position'(621, 23, 0, 621)))
^  Call: (264) [user] trly(untyped_to_metta, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _5908)
^  Unify: (264) [user] trly(untyped_to_metta, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _5908)
^  Call: (265) [user] once(call(untyped_to_metta, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _172698))
^  Unify: (265) [system] once(user:call(untyped_to_metta, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _172698))
^  Call: (266) [user] call(untyped_to_metta, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _172698)
^  Unify: (266) [system] call(user:untyped_to_metta, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _172698)
^  Call: (267) [user] untyped_to_metta([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _172698)
^  Unify: (267) [user] untyped_to_metta([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _172698)
^  Call: (268) [user] must_det_ll(trly(mfix_vars1, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _178310))
^  Unify: (268) [user] must_det_ll(user:trly(mfix_vars1, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _178310))
^  Call: (269) [user] once(user:trly(mfix_vars1, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _178310))
^  Unify: (269) [system] once(user:trly(mfix_vars1, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _178310))
^  Call: (270) [user] trly(mfix_vars1, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _178310)
^  Unify: (270) [user] trly(mfix_vars1, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _178310)
^  Call: (271) [user] once(call(mfix_vars1, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896))
^  Unify: (271) [system] once(user:call(mfix_vars1, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896))
^  Call: (272) [user] call(mfix_vars1, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896)
^  Unify: (272) [system] call(user:mfix_vars1, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896)
^  Call: (273) [user] mfix_vars1([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896)
^  Unify: (273) [user] mfix_vars1([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896)
   Call: (274) [system] var([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Redo: (273) [user] mfix_vars1([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896)
^  Unify: (273) [user] mfix_vars1([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], '$VAR'(_191356))
   Call: (274) [system] atom([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Redo: (273) [user] mfix_vars1([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896)
^  Unify: (273) [user] mfix_vars1([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896)
   Call: (274) [system] [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]==true
^  Redo: (273) [user] mfix_vars1([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896)
^  Unify: (273) [user] mfix_vars1([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896)
   Call: (274) [system] [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]==false
^  Redo: (273) [user] mfix_vars1([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896)
^  Unify: (273) [user] mfix_vars1([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896)
   Call: (274) [system] (:)=='['
^  Redo: (273) [user] mfix_vars1([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896)
^  Unify: (273) [user] mfix_vars1([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896)
   Call: (274) [system] (:)=='{'
^  Redo: (273) [user] mfix_vars1([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896)
^  Unify: (273) [user] mfix_vars1([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896)
   Call: (274) [system] is_list([apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
   Exit: (274) [system] is_list([apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
   Call: (274) [lists] lists:last([apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _208050)
   Unify: (274) [lists] lists:last([apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _208050)
   Call: (275) [lists] lists:last_([[->, 'Atom', 'Variable', 'Atom', 'Atom']], apply, _208050)
   Unify: (275) [lists] lists:last_([[->, 'Atom', 'Variable', 'Atom', 'Atom']], apply, _208050)
   Call: (276) [lists] lists:last_([], [->, 'Atom', 'Variable', 'Atom', 'Atom'], _208050)
   Unify: (276) [lists] lists:last_([], [->, 'Atom', 'Variable', 'Atom', 'Atom'], [->, 'Atom', 'Variable', 'Atom', 'Atom'])
   Exit: (276) [lists] lists:last_([], [->, 'Atom', 'Variable', 'Atom', 'Atom'], [->, 'Atom', 'Variable', 'Atom', 'Atom'])
   Exit: (275) [lists] lists:last_([[->, 'Atom', 'Variable', 'Atom', 'Atom']], apply, [->, 'Atom', 'Variable', 'Atom', 'Atom'])
   Exit: (274) [lists] lists:last([apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [->, 'Atom', 'Variable', 'Atom', 'Atom'])
   Call: (274) [system] [->, 'Atom', 'Variable', 'Atom', 'Atom']=='}'
^  Redo: (273) [user] mfix_vars1([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896)
^  Unify: (273) [user] mfix_vars1([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896)
   Call: (274) [system] [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]==[_219214, _219220]
^  Redo: (273) [user] mfix_vars1([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896)
^  Unify: (273) [user] mfix_vars1([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896)
   Call: (274) [system] fail
^  Redo: (273) [user] mfix_vars1([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896)
^  Unify: (273) [user] mfix_vars1([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896)
   Call: (274) [system] is_list([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
   Exit: (274) [system] is_list([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Call: (274) [user] apply:maplist(mfix_vars1, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896)
^  Unify: (274) [apply] apply:maplist(user:mfix_vars1, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896)
   Call: (275) [apply] apply:maplist_([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _183896, user:mfix_vars1)
   Unify: (275) [apply] apply:maplist_([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [_229444|_229446], user:mfix_vars1)
^  Call: (276) [user] mfix_vars1(:, _229444)
^  Unify: (276) [user] mfix_vars1(:, _229444)
   Call: (277) [system] var(:)
^  Redo: (276) [user] mfix_vars1(:, _229444)
^  Unify: (276) [user] mfix_vars1(:, '$VAR'(_234090))
   Call: (277) [system] atom(:)
   Exit: (277) [system] atom(:)
^  Call: (277) [user] symbol_concat($, _236868, :)
^  Unify: (277) [user] symbol_concat($, _236868, :)
   Call: (278) [system] atom_concat($, _236868, :)
   Fail: (278) [system] atom_concat($, _236868, :)
^  Fail: (277) [user] symbol_concat($, _236868, :)
^  Redo: (276) [user] mfix_vars1(:, _229444)
^  Unify: (276) [user] mfix_vars1(:, _229444)
   Call: (277) [system] (:)==true
^  Redo: (276) [user] mfix_vars1(:, _229444)
^  Unify: (276) [user] mfix_vars1(:, _229444)
   Call: (277) [system] (:)==false
^  Redo: (276) [user] mfix_vars1(:, _229444)
^  Unify: (276) [user] mfix_vars1(:, _229444)
   Call: (277) [system] (:)==[_248956, _248962]
^  Redo: (276) [user] mfix_vars1(:, _229444)
^  Unify: (276) [user] mfix_vars1(:, _229444)
   Call: (277) [system] is_list(:)
^  Redo: (276) [user] mfix_vars1(:, _229444)
^  Unify: (276) [user] mfix_vars1(:, _229444)
   Call: (277) [system] string(:)
^  Redo: (276) [user] mfix_vars1(:, _229444)
^  Unify: (276) [user] mfix_vars1(:, _229444)
   Call: (277) [system] compound(:)
^  Redo: (276) [user] mfix_vars1(:, _229444)
^  Unify: (276) [user] mfix_vars1(:, _229444)
^  Call: (277) [user] symbol(:)
^  Unify: (277) [user] symbol(:)
   Call: (278) [system] atom(:)
   Exit: (278) [system] atom(:)
^  Exit: (277) [user] symbol(:)
^  Unify: (276) [user] mfix_vars1(:, :)
^  Exit: (276) [user] mfix_vars1(:, :)
   Call: (276) [apply] apply:maplist_([apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _229446, user:mfix_vars1)
   Unify: (276) [apply] apply:maplist_([apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [_267500|_267502], user:mfix_vars1)
^  Call: (277) [user] mfix_vars1(apply, _267500)
^  Unify: (277) [user] mfix_vars1(apply, _267500)
   Call: (278) [system] var(apply)
^  Redo: (277) [user] mfix_vars1(apply, _267500)
^  Unify: (277) [user] mfix_vars1(apply, '$VAR'(_272146))
   Call: (278) [system] atom(apply)
   Exit: (278) [system] atom(apply)
^  Call: (278) [user] symbol_concat($, _274924, apply)
^  Unify: (278) [user] symbol_concat($, _274924, apply)
   Call: (279) [system] atom_concat($, _274924, apply)
   Fail: (279) [system] atom_concat($, _274924, apply)
^  Fail: (278) [user] symbol_concat($, _274924, apply)
^  Redo: (277) [user] mfix_vars1(apply, _267500)
^  Unify: (277) [user] mfix_vars1(apply, _267500)
   Call: (278) [system] apply==true
^  Redo: (277) [user] mfix_vars1(apply, _267500)
^  Unify: (277) [user] mfix_vars1(apply, _267500)
   Call: (278) [system] apply==false
^  Redo: (277) [user] mfix_vars1(apply, _267500)
^  Unify: (277) [user] mfix_vars1(apply, _267500)
   Call: (278) [system] apply==[_287012, _287018]
^  Redo: (277) [user] mfix_vars1(apply, _267500)
^  Unify: (277) [user] mfix_vars1(apply, _267500)
   Call: (278) [system] is_list(apply)
^  Redo: (277) [user] mfix_vars1(apply, _267500)
^  Unify: (277) [user] mfix_vars1(apply, _267500)
   Call: (278) [system] string(apply)
^  Redo: (277) [user] mfix_vars1(apply, _267500)
^  Unify: (277) [user] mfix_vars1(apply, _267500)
   Call: (278) [system] compound(apply)
^  Redo: (277) [user] mfix_vars1(apply, _267500)
^  Unify: (277) [user] mfix_vars1(apply, _267500)
^  Call: (278) [user] symbol(apply)
^  Unify: (278) [user] symbol(apply)
   Call: (279) [system] atom(apply)
   Exit: (279) [system] atom(apply)
^  Exit: (278) [user] symbol(apply)
^  Unify: (277) [user] mfix_vars1(apply, apply)
^  Exit: (277) [user] mfix_vars1(apply, apply)
   Call: (277) [apply] apply:maplist_([[->, 'Atom', 'Variable', 'Atom', 'Atom']], _267502, user:mfix_vars1)
   Unify: (277) [apply] apply:maplist_([[->, 'Atom', 'Variable', 'Atom', 'Atom']], [_305556|_305558], user:mfix_vars1)
^  Call: (278) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _305556)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _305556)
   Call: (279) [system] var([->, 'Atom', 'Variable', 'Atom', 'Atom'])
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _305556)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], '$VAR'(_310202))
   Call: (279) [system] atom([->, 'Atom', 'Variable', 'Atom', 'Atom'])
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _305556)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _305556)
   Call: (279) [system] [->, 'Atom', 'Variable', 'Atom', 'Atom']==true
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _305556)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _305556)
   Call: (279) [system] [->, 'Atom', 'Variable', 'Atom', 'Atom']==false
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _305556)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _305556)
   Call: (279) [system] (->)=='['
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _305556)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _305556)
   Call: (279) [system] (->)=='{'
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _305556)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _305556)
   Call: (279) [system] is_list(['Atom', 'Variable', 'Atom', 'Atom'])
   Exit: (279) [system] is_list(['Atom', 'Variable', 'Atom', 'Atom'])
   Call: (279) [lists] lists:last(['Atom', 'Variable', 'Atom', 'Atom'], _326896)
   Unify: (279) [lists] lists:last(['Atom', 'Variable', 'Atom', 'Atom'], _326896)
   Call: (280) [lists] lists:last_(['Variable', 'Atom', 'Atom'], 'Atom', _326896)
   Unify: (280) [lists] lists:last_(['Variable', 'Atom', 'Atom'], 'Atom', _326896)
   Call: (281) [lists] lists:last_(['Atom', 'Atom'], 'Variable', _326896)
   Unify: (281) [lists] lists:last_(['Atom', 'Atom'], 'Variable', _326896)
   Call: (282) [lists] lists:last_(['Atom'], 'Atom', _326896)
   Unify: (282) [lists] lists:last_(['Atom'], 'Atom', _326896)
   Call: (283) [lists] lists:last_([], 'Atom', _326896)
   Unify: (283) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (283) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (282) [lists] lists:last_(['Atom'], 'Atom', 'Atom')
   Exit: (281) [lists] lists:last_(['Atom', 'Atom'], 'Variable', 'Atom')
   Exit: (280) [lists] lists:last_(['Variable', 'Atom', 'Atom'], 'Atom', 'Atom')
   Exit: (279) [lists] lists:last(['Atom', 'Variable', 'Atom', 'Atom'], 'Atom')
   Call: (279) [system] 'Atom'=='}'
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _305556)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _305556)
   Call: (279) [system] [->, 'Atom', 'Variable', 'Atom', 'Atom']==[_343652, _343658]
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _305556)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _305556)
   Call: (279) [system] fail
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _305556)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], _305556)
   Call: (279) [system] is_list([->, 'Atom', 'Variable', 'Atom', 'Atom'])
   Exit: (279) [system] is_list([->, 'Atom', 'Variable', 'Atom', 'Atom'])
^  Call: (279) [user] apply:maplist(mfix_vars1, [->, 'Atom', 'Variable', 'Atom', 'Atom'], _305556)
^  Unify: (279) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Variable', 'Atom', 'Atom'], _305556)
   Call: (280) [apply] apply:maplist_([->, 'Atom', 'Variable', 'Atom', 'Atom'], _305556, user:mfix_vars1)
   Unify: (280) [apply] apply:maplist_([->, 'Atom', 'Variable', 'Atom', 'Atom'], [_353882|_353884], user:mfix_vars1)
^  Call: (281) [user] mfix_vars1(->, _353882)
^  Unify: (281) [user] mfix_vars1(->, _353882)
   Call: (282) [system] var(->)
^  Redo: (281) [user] mfix_vars1(->, _353882)
^  Unify: (281) [user] mfix_vars1(->, '$VAR'(_358528))
   Call: (282) [system] atom(->)
   Exit: (282) [system] atom(->)
^  Call: (282) [user] symbol_concat($, _361306, ->)
^  Unify: (282) [user] symbol_concat($, _361306, ->)
   Call: (283) [system] atom_concat($, _361306, ->)
   Fail: (283) [system] atom_concat($, _361306, ->)
^  Fail: (282) [user] symbol_concat($, _361306, ->)
^  Redo: (281) [user] mfix_vars1(->, _353882)
^  Unify: (281) [user] mfix_vars1(->, _353882)
   Call: (282) [system] (->)==true
^  Redo: (281) [user] mfix_vars1(->, _353882)
^  Unify: (281) [user] mfix_vars1(->, _353882)
   Call: (282) [system] (->)==false
^  Redo: (281) [user] mfix_vars1(->, _353882)
^  Unify: (281) [user] mfix_vars1(->, _353882)
   Call: (282) [system] (->)==[_373394, _373400]
^  Redo: (281) [user] mfix_vars1(->, _353882)
^  Unify: (281) [user] mfix_vars1(->, _353882)
   Call: (282) [system] is_list(->)
^  Redo: (281) [user] mfix_vars1(->, _353882)
^  Unify: (281) [user] mfix_vars1(->, _353882)
   Call: (282) [system] string(->)
^  Redo: (281) [user] mfix_vars1(->, _353882)
^  Unify: (281) [user] mfix_vars1(->, _353882)
   Call: (282) [system] compound(->)
^  Redo: (281) [user] mfix_vars1(->, _353882)
^  Unify: (281) [user] mfix_vars1(->, _353882)
^  Call: (282) [user] symbol(->)
^  Unify: (282) [user] symbol(->)
   Call: (283) [system] atom(->)
   Exit: (283) [system] atom(->)
^  Exit: (282) [user] symbol(->)
^  Unify: (281) [user] mfix_vars1(->, ->)
^  Exit: (281) [user] mfix_vars1(->, ->)
   Call: (281) [apply] apply:maplist_(['Atom', 'Variable', 'Atom', 'Atom'], _353884, user:mfix_vars1)
   Unify: (281) [apply] apply:maplist_(['Atom', 'Variable', 'Atom', 'Atom'], [_391938|_391940], user:mfix_vars1)
^  Call: (282) [user] mfix_vars1('Atom', _391938)
^  Unify: (282) [user] mfix_vars1('Atom', _391938)
   Call: (283) [system] var('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _391938)
^  Unify: (282) [user] mfix_vars1('Atom', '$VAR'(_396584))
   Call: (283) [system] atom('Atom')
   Exit: (283) [system] atom('Atom')
^  Call: (283) [user] symbol_concat($, _399362, 'Atom')
^  Unify: (283) [user] symbol_concat($, _399362, 'Atom')
   Call: (284) [system] atom_concat($, _399362, 'Atom')
   Fail: (284) [system] atom_concat($, _399362, 'Atom')
^  Fail: (283) [user] symbol_concat($, _399362, 'Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _391938)
^  Unify: (282) [user] mfix_vars1('Atom', _391938)
   Call: (283) [system] 'Atom'==true
^  Redo: (282) [user] mfix_vars1('Atom', _391938)
^  Unify: (282) [user] mfix_vars1('Atom', _391938)
   Call: (283) [system] 'Atom'==false
^  Redo: (282) [user] mfix_vars1('Atom', _391938)
^  Unify: (282) [user] mfix_vars1('Atom', _391938)
   Call: (283) [system] 'Atom'==[_411450, _411456]
^  Redo: (282) [user] mfix_vars1('Atom', _391938)
^  Unify: (282) [user] mfix_vars1('Atom', _391938)
   Call: (283) [system] is_list('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _391938)
^  Unify: (282) [user] mfix_vars1('Atom', _391938)
   Call: (283) [system] string('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _391938)
^  Unify: (282) [user] mfix_vars1('Atom', _391938)
   Call: (283) [system] compound('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _391938)
^  Unify: (282) [user] mfix_vars1('Atom', _391938)
^  Call: (283) [user] symbol('Atom')
^  Unify: (283) [user] symbol('Atom')
   Call: (284) [system] atom('Atom')
   Exit: (284) [system] atom('Atom')
^  Exit: (283) [user] symbol('Atom')
^  Unify: (282) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (282) [user] mfix_vars1('Atom', 'Atom')
   Call: (282) [apply] apply:maplist_(['Variable', 'Atom', 'Atom'], _391940, user:mfix_vars1)
   Unify: (282) [apply] apply:maplist_(['Variable', 'Atom', 'Atom'], [_429994|_429996], user:mfix_vars1)
^  Call: (283) [user] mfix_vars1('Variable', _429994)
^  Unify: (283) [user] mfix_vars1('Variable', _429994)
   Call: (284) [system] var('Variable')
^  Redo: (283) [user] mfix_vars1('Variable', _429994)
^  Unify: (283) [user] mfix_vars1('Variable', '$VAR'(_434640))
   Call: (284) [system] atom('Variable')
   Exit: (284) [system] atom('Variable')
^  Call: (284) [user] symbol_concat($, _437418, 'Variable')
^  Unify: (284) [user] symbol_concat($, _437418, 'Variable')
   Call: (285) [system] atom_concat($, _437418, 'Variable')
   Fail: (285) [system] atom_concat($, _437418, 'Variable')
^  Fail: (284) [user] symbol_concat($, _437418, 'Variable')
^  Redo: (283) [user] mfix_vars1('Variable', _429994)
^  Unify: (283) [user] mfix_vars1('Variable', _429994)
   Call: (284) [system] 'Variable'==true
^  Redo: (283) [user] mfix_vars1('Variable', _429994)
^  Unify: (283) [user] mfix_vars1('Variable', _429994)
   Call: (284) [system] 'Variable'==false
^  Redo: (283) [user] mfix_vars1('Variable', _429994)
^  Unify: (283) [user] mfix_vars1('Variable', _429994)
   Call: (284) [system] 'Variable'==[_449506, _449512]
^  Redo: (283) [user] mfix_vars1('Variable', _429994)
^  Unify: (283) [user] mfix_vars1('Variable', _429994)
   Call: (284) [system] is_list('Variable')
^  Redo: (283) [user] mfix_vars1('Variable', _429994)
^  Unify: (283) [user] mfix_vars1('Variable', _429994)
   Call: (284) [system] string('Variable')
^  Redo: (283) [user] mfix_vars1('Variable', _429994)
^  Unify: (283) [user] mfix_vars1('Variable', _429994)
   Call: (284) [system] compound('Variable')
^  Redo: (283) [user] mfix_vars1('Variable', _429994)
^  Unify: (283) [user] mfix_vars1('Variable', _429994)
^  Call: (284) [user] symbol('Variable')
^  Unify: (284) [user] symbol('Variable')
   Call: (285) [system] atom('Variable')
   Exit: (285) [system] atom('Variable')
^  Exit: (284) [user] symbol('Variable')
^  Unify: (283) [user] mfix_vars1('Variable', 'Variable')
^  Exit: (283) [user] mfix_vars1('Variable', 'Variable')
   Call: (283) [apply] apply:maplist_(['Atom', 'Atom'], _429996, user:mfix_vars1)
   Unify: (283) [apply] apply:maplist_(['Atom', 'Atom'], [_468050|_468052], user:mfix_vars1)
^  Call: (284) [user] mfix_vars1('Atom', _468050)
^  Unify: (284) [user] mfix_vars1('Atom', _468050)
   Call: (285) [system] var('Atom')
^  Redo: (284) [user] mfix_vars1('Atom', _468050)
^  Unify: (284) [user] mfix_vars1('Atom', '$VAR'(_472696))
   Call: (285) [system] atom('Atom')
   Exit: (285) [system] atom('Atom')
^  Call: (285) [user] symbol_concat($, _475474, 'Atom')
^  Unify: (285) [user] symbol_concat($, _475474, 'Atom')
   Call: (286) [system] atom_concat($, _475474, 'Atom')
   Fail: (286) [system] atom_concat($, _475474, 'Atom')
^  Fail: (285) [user] symbol_concat($, _475474, 'Atom')
^  Redo: (284) [user] mfix_vars1('Atom', _468050)
^  Unify: (284) [user] mfix_vars1('Atom', _468050)
   Call: (285) [system] 'Atom'==true
^  Redo: (284) [user] mfix_vars1('Atom', _468050)
^  Unify: (284) [user] mfix_vars1('Atom', _468050)
   Call: (285) [system] 'Atom'==false
^  Redo: (284) [user] mfix_vars1('Atom', _468050)
^  Unify: (284) [user] mfix_vars1('Atom', _468050)
   Call: (285) [system] 'Atom'==[_487562, _487568]
^  Redo: (284) [user] mfix_vars1('Atom', _468050)
^  Unify: (284) [user] mfix_vars1('Atom', _468050)
   Call: (285) [system] is_list('Atom')
^  Redo: (284) [user] mfix_vars1('Atom', _468050)
^  Unify: (284) [user] mfix_vars1('Atom', _468050)
   Call: (285) [system] string('Atom')
^  Redo: (284) [user] mfix_vars1('Atom', _468050)
^  Unify: (284) [user] mfix_vars1('Atom', _468050)
   Call: (285) [system] compound('Atom')
^  Redo: (284) [user] mfix_vars1('Atom', _468050)
^  Unify: (284) [user] mfix_vars1('Atom', _468050)
^  Call: (285) [user] symbol('Atom')
^  Unify: (285) [user] symbol('Atom')
   Call: (286) [system] atom('Atom')
   Exit: (286) [system] atom('Atom')
^  Exit: (285) [user] symbol('Atom')
^  Unify: (284) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (284) [user] mfix_vars1('Atom', 'Atom')
   Call: (284) [apply] apply:maplist_(['Atom'], _468052, user:mfix_vars1)
   Unify: (284) [apply] apply:maplist_(['Atom'], [_506106|_506108], user:mfix_vars1)
^  Call: (285) [user] mfix_vars1('Atom', _506106)
^  Unify: (285) [user] mfix_vars1('Atom', _506106)
   Call: (286) [system] var('Atom')
^  Redo: (285) [user] mfix_vars1('Atom', _506106)
^  Unify: (285) [user] mfix_vars1('Atom', '$VAR'(_510752))
   Call: (286) [system] atom('Atom')
   Exit: (286) [system] atom('Atom')
^  Call: (286) [user] symbol_concat($, _513530, 'Atom')
^  Unify: (286) [user] symbol_concat($, _513530, 'Atom')
   Call: (287) [system] atom_concat($, _513530, 'Atom')
   Fail: (287) [system] atom_concat($, _513530, 'Atom')
^  Fail: (286) [user] symbol_concat($, _513530, 'Atom')
^  Redo: (285) [user] mfix_vars1('Atom', _506106)
^  Unify: (285) [user] mfix_vars1('Atom', _506106)
   Call: (286) [system] 'Atom'==true
^  Redo: (285) [user] mfix_vars1('Atom', _506106)
^  Unify: (285) [user] mfix_vars1('Atom', _506106)
   Call: (286) [system] 'Atom'==false
^  Redo: (285) [user] mfix_vars1('Atom', _6074)
^  Unify: (285) [user] mfix_vars1('Atom', _6074)
   Call: (286) [system] 'Atom'==[_7756, _7762]
^  Redo: (285) [user] mfix_vars1('Atom', _6074)
^  Unify: (285) [user] mfix_vars1('Atom', _6074)
   Call: (286) [system] is_list('Atom')
^  Redo: (285) [user] mfix_vars1('Atom', _6074)
^  Unify: (285) [user] mfix_vars1('Atom', _6074)
   Call: (286) [system] string('Atom')
^  Redo: (285) [user] mfix_vars1('Atom', _6074)
^  Unify: (285) [user] mfix_vars1('Atom', _6074)
   Call: (286) [system] compound('Atom')
^  Redo: (285) [user] mfix_vars1('Atom', _6074)
^  Unify: (285) [user] mfix_vars1('Atom', _6074)
^  Call: (286) [user] symbol('Atom')
^  Unify: (286) [user] symbol('Atom')
   Call: (287) [system] atom('Atom')
   Exit: (287) [system] atom('Atom')
^  Exit: (286) [user] symbol('Atom')
^  Unify: (285) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (285) [user] mfix_vars1('Atom', 'Atom')
   Call: (285) [apply] apply:maplist_([], _6076, user:mfix_vars1)
   Unify: (285) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (285) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (284) [apply] apply:maplist_(['Atom'], ['Atom'], user:mfix_vars1)
   Exit: (283) [apply] apply:maplist_(['Atom', 'Atom'], ['Atom', 'Atom'], user:mfix_vars1)
   Exit: (282) [apply] apply:maplist_(['Variable', 'Atom', 'Atom'], ['Variable', 'Atom', 'Atom'], user:mfix_vars1)
   Exit: (281) [apply] apply:maplist_(['Atom', 'Variable', 'Atom', 'Atom'], ['Atom', 'Variable', 'Atom', 'Atom'], user:mfix_vars1)
   Exit: (280) [apply] apply:maplist_([->, 'Atom', 'Variable', 'Atom', 'Atom'], [->, 'Atom', 'Variable', 'Atom', 'Atom'], user:mfix_vars1)
^  Exit: (279) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Variable', 'Atom', 'Atom'], [->, 'Atom', 'Variable', 'Atom', 'Atom'])
^  Exit: (278) [user] mfix_vars1([->, 'Atom', 'Variable', 'Atom', 'Atom'], [->, 'Atom', 'Variable', 'Atom', 'Atom'])
   Call: (278) [apply] apply:maplist_([], _6040, user:mfix_vars1)
   Unify: (278) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (278) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (277) [apply] apply:maplist_([[->, 'Atom', 'Variable', 'Atom', 'Atom']], [[->, 'Atom', 'Variable', 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (276) [apply] apply:maplist_([apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (275) [apply] apply:maplist_([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], user:mfix_vars1)
^  Exit: (274) [apply] apply:maplist(user:mfix_vars1, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (273) [user] mfix_vars1([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (272) [system] call(user:mfix_vars1, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (271) [system] once(user:call(mfix_vars1, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]))
   Call: (271) [system] [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]\=@=[:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]
^  Redo: (270) [user] trly(mfix_vars1, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _5990)
^  Unify: (270) [user] trly(mfix_vars1, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (270) [user] trly(mfix_vars1, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (269) [system] once(user:trly(mfix_vars1, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]))
^  Exit: (268) [user] must_det_ll(user:trly(mfix_vars1, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]))
^  Call: (268) [user] must_det_ll(trly(cons_to_c, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _49598))
^  Unify: (268) [user] must_det_ll(user:trly(cons_to_c, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _49598))
^  Call: (269) [user] once(user:trly(cons_to_c, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _49598))
^  Unify: (269) [system] once(user:trly(cons_to_c, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _49598))
^  Call: (270) [user] trly(cons_to_c, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _49598)
^  Unify: (270) [user] trly(cons_to_c, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _49598)
^  Call: (271) [user] once(call(cons_to_c, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _55184))
^  Unify: (271) [system] once(user:call(cons_to_c, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _55184))
^  Call: (272) [user] call(cons_to_c, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _55184)
^  Unify: (272) [system] call(user:cons_to_c, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _55184)
^  Call: (273) [user] cons_to_c([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _55184)
^  Unify: (273) [user] cons_to_c([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Call: (274) [user] no_cons_reduce
^  Unify: (274) [user] no_cons_reduce
^  Exit: (274) [user] no_cons_reduce
^  Exit: (273) [user] cons_to_c([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (272) [system] call(user:cons_to_c, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (271) [system] once(user:call(cons_to_c, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]))
   Call: (271) [system] [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]\=@=[:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]
^  Redo: (270) [user] trly(cons_to_c, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _49598)
^  Unify: (270) [user] trly(cons_to_c, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (270) [user] trly(cons_to_c, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (269) [system] once(user:trly(cons_to_c, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]))
^  Exit: (268) [user] must_det_ll(user:trly(cons_to_c, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]))
^  Call: (268) [user] must_det_ll(trly(cons_to_l, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _5970))
^  Unify: (268) [user] must_det_ll(user:trly(cons_to_l, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _5970))
^  Call: (269) [user] once(user:trly(cons_to_l, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _5970))
^  Unify: (269) [system] once(user:trly(cons_to_l, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _5970))
^  Call: (270) [user] trly(cons_to_l, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _5970)
^  Unify: (270) [user] trly(cons_to_l, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _5970)
^  Call: (271) [user] once(call(cons_to_l, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _77504))
^  Unify: (271) [system] once(user:call(cons_to_l, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _77504))
^  Call: (272) [user] call(cons_to_l, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _77504)
^  Unify: (272) [system] call(user:cons_to_l, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _77504)
^  Call: (273) [user] cons_to_l([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _77504)
^  Unify: (273) [user] cons_to_l([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Call: (274) [user] no_cons_reduce
^  Unify: (274) [user] no_cons_reduce
^  Exit: (274) [user] no_cons_reduce
^  Exit: (273) [user] cons_to_l([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (272) [system] call(user:cons_to_l, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (271) [system] once(user:call(cons_to_l, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]))
   Call: (271) [system] [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]\=@=[:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]
^  Redo: (270) [user] trly(cons_to_l, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _5970)
^  Unify: (270) [user] trly(cons_to_l, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (270) [user] trly(cons_to_l, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (269) [system] once(user:trly(cons_to_l, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]))
^  Exit: (268) [user] must_det_ll(user:trly(cons_to_l, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]))
^  Exit: (267) [user] untyped_to_metta([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (266) [system] call(user:untyped_to_metta, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (265) [system] once(user:call(untyped_to_metta, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]))
   Call: (265) [system] [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]\=@=[:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']]
^  Redo: (264) [user] trly(untyped_to_metta, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _5908)
^  Unify: (264) [user] trly(untyped_to_metta, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (264) [user] trly(untyped_to_metta, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
   Call: (263) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])))
   Unify: (263) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])))
   Exit: (263) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])))
^  Exit: (262) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Call: (257) [user] subst_vars([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _112740, [], _112742)
^  Unify: (257) [user] subst_vars([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], [])
   Call: (258) [system] var([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Redo: (257) [user] subst_vars([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _112740, [], _112742)
^  Unify: (257) [user] subst_vars([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [_116478|_116480], [], _112742)
^  Call: (258) [user] subst_vars(:, _116478, [], _117418)
^  Unify: (258) [user] subst_vars(:, :, [], [])
   Call: (259) [system] var(:)
^  Redo: (258) [user] subst_vars(:, _116478, [], _117418)
^  Unify: (258) [user] subst_vars(:, _116478, [], _117418)
   Call: (259) [system] atom(:)
   Exit: (259) [system] atom(:)
^  Call: (259) [user] symbol_concat($, _123936, :)
^  Unify: (259) [user] symbol_concat($, _123936, :)
   Call: (260) [system] atom_concat($, _123936, :)
   Fail: (260) [system] atom_concat($, _123936, :)
^  Fail: (259) [user] symbol_concat($, _123936, :)
^  Redo: (258) [user] subst_vars(:, _116478, [], _117418)
^  Unify: (258) [user] subst_vars(:, _116478, [], _117418)
   Call: (259) [system] compound(:)
^  Redo: (258) [user] subst_vars(:, _116478, [], _117418)
^  Unify: (258) [user] subst_vars(:, :, [], [])
^  Exit: (258) [user] subst_vars(:, :, [], [])
^  Call: (258) [user] subst_vars([apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _116480, [], _112742)
^  Unify: (258) [user] subst_vars([apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], [])
   Call: (259) [system] var([apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Redo: (258) [user] subst_vars([apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], _116480, [], _112742)
^  Unify: (258) [user] subst_vars([apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [_137936|_137938], [], _112742)
^  Call: (259) [user] subst_vars(apply, _137936, [], _138876)
^  Unify: (259) [user] subst_vars(apply, apply, [], [])
   Call: (260) [system] var(apply)
^  Redo: (259) [user] subst_vars(apply, _137936, [], _138876)
^  Unify: (259) [user] subst_vars(apply, _137936, [], _138876)
   Call: (260) [system] atom(apply)
   Exit: (260) [system] atom(apply)
^  Call: (260) [user] symbol_concat($, _145394, apply)
^  Unify: (260) [user] symbol_concat($, _145394, apply)
   Call: (261) [system] atom_concat($, _145394, apply)
   Fail: (261) [system] atom_concat($, _145394, apply)
^  Fail: (260) [user] symbol_concat($, _145394, apply)
^  Redo: (259) [user] subst_vars(apply, _137936, [], _138876)
^  Unify: (259) [user] subst_vars(apply, _137936, [], _138876)
   Call: (260) [system] compound(apply)
^  Redo: (259) [user] subst_vars(apply, _137936, [], _138876)
^  Unify: (259) [user] subst_vars(apply, apply, [], [])
^  Exit: (259) [user] subst_vars(apply, apply, [], [])
^  Call: (259) [user] subst_vars([[->, 'Atom', 'Variable', 'Atom', 'Atom']], _137938, [], _112742)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Variable', 'Atom', 'Atom']], [[->, 'Atom', 'Variable', 'Atom', 'Atom']], [], [])
   Call: (260) [system] var([[->, 'Atom', 'Variable', 'Atom', 'Atom']])
^  Redo: (259) [user] subst_vars([[->, 'Atom', 'Variable', 'Atom', 'Atom']], _137938, [], _112742)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Variable', 'Atom', 'Atom']], [_159394|_159396], [], _112742)
^  Call: (260) [user] subst_vars([->, 'Atom', 'Variable', 'Atom', 'Atom'], _159394, [], _160334)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Variable', 'Atom', 'Atom'], [->, 'Atom', 'Variable', 'Atom', 'Atom'], [], [])
   Call: (261) [system] var([->, 'Atom', 'Variable', 'Atom', 'Atom'])
^  Redo: (260) [user] subst_vars([->, 'Atom', 'Variable', 'Atom', 'Atom'], _159394, [], _160334)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Variable', 'Atom', 'Atom'], [_164070|_164072], [], _160334)
^  Call: (261) [user] subst_vars(->, _164070, [], _165010)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
   Call: (262) [system] var(->)
^  Redo: (261) [user] subst_vars(->, _164070, [], _165010)
^  Unify: (261) [user] subst_vars(->, _164070, [], _165010)
   Call: (262) [system] atom(->)
   Exit: (262) [system] atom(->)
^  Call: (262) [user] symbol_concat($, _171528, ->)
^  Unify: (262) [user] symbol_concat($, _171528, ->)
   Call: (263) [system] atom_concat($, _171528, ->)
   Fail: (263) [system] atom_concat($, _171528, ->)
^  Fail: (262) [user] symbol_concat($, _171528, ->)
^  Redo: (261) [user] subst_vars(->, _164070, [], _165010)
^  Unify: (261) [user] subst_vars(->, _164070, [], _165010)
   Call: (262) [system] compound(->)
^  Redo: (261) [user] subst_vars(->, _164070, [], _165010)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
^  Exit: (261) [user] subst_vars(->, ->, [], [])
^  Call: (261) [user] subst_vars(['Atom', 'Variable', 'Atom', 'Atom'], _164072, [], _160334)
^  Unify: (261) [user] subst_vars(['Atom', 'Variable', 'Atom', 'Atom'], ['Atom', 'Variable', 'Atom', 'Atom'], [], [])
   Call: (262) [system] var(['Atom', 'Variable', 'Atom', 'Atom'])
^  Redo: (261) [user] subst_vars(['Atom', 'Variable', 'Atom', 'Atom'], _164072, [], _160334)
^  Unify: (261) [user] subst_vars(['Atom', 'Variable', 'Atom', 'Atom'], [_185528|_185530], [], _160334)
^  Call: (262) [user] subst_vars('Atom', _185528, [], _186468)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (263) [system] var('Atom')
^  Redo: (262) [user] subst_vars('Atom', _185528, [], _186468)
^  Unify: (262) [user] subst_vars('Atom', _185528, [], _186468)
   Call: (263) [system] atom('Atom')
   Exit: (263) [system] atom('Atom')
^  Call: (263) [user] symbol_concat($, _192986, 'Atom')
^  Unify: (263) [user] symbol_concat($, _192986, 'Atom')
   Call: (264) [system] atom_concat($, _192986, 'Atom')
   Fail: (264) [system] atom_concat($, _192986, 'Atom')
^  Fail: (263) [user] symbol_concat($, _192986, 'Atom')
^  Redo: (262) [user] subst_vars('Atom', _185528, [], _186468)
^  Unify: (262) [user] subst_vars('Atom', _185528, [], _186468)
   Call: (263) [system] compound('Atom')
^  Redo: (262) [user] subst_vars('Atom', _185528, [], _186468)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (262) [user] subst_vars(['Variable', 'Atom', 'Atom'], _185530, [], _160334)
^  Unify: (262) [user] subst_vars(['Variable', 'Atom', 'Atom'], ['Variable', 'Atom', 'Atom'], [], [])
   Call: (263) [system] var(['Variable', 'Atom', 'Atom'])
^  Redo: (262) [user] subst_vars(['Variable', 'Atom', 'Atom'], _185530, [], _160334)
^  Unify: (262) [user] subst_vars(['Variable', 'Atom', 'Atom'], [_206986|_206988], [], _160334)
^  Call: (263) [user] subst_vars('Variable', _206986, [], _207926)
^  Unify: (263) [user] subst_vars('Variable', 'Variable', [], [])
   Call: (264) [system] var('Variable')
^  Redo: (263) [user] subst_vars('Variable', _206986, [], _207926)
^  Unify: (263) [user] subst_vars('Variable', _206986, [], _207926)
   Call: (264) [system] atom('Variable')
   Exit: (264) [system] atom('Variable')
^  Call: (264) [user] symbol_concat($, _214444, 'Variable')
^  Unify: (264) [user] symbol_concat($, _214444, 'Variable')
   Call: (265) [system] atom_concat($, _214444, 'Variable')
   Fail: (265) [system] atom_concat($, _214444, 'Variable')
^  Fail: (264) [user] symbol_concat($, _214444, 'Variable')
^  Redo: (263) [user] subst_vars('Variable', _206986, [], _207926)
^  Unify: (263) [user] subst_vars('Variable', _206986, [], _207926)
   Call: (264) [system] compound('Variable')
^  Redo: (263) [user] subst_vars('Variable', _206986, [], _207926)
^  Unify: (263) [user] subst_vars('Variable', 'Variable', [], [])
^  Exit: (263) [user] subst_vars('Variable', 'Variable', [], [])
^  Call: (263) [user] subst_vars(['Atom', 'Atom'], _206988, [], _160334)
^  Unify: (263) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
   Call: (264) [system] var(['Atom', 'Atom'])
^  Redo: (263) [user] subst_vars(['Atom', 'Atom'], _206988, [], _160334)
^  Unify: (263) [user] subst_vars(['Atom', 'Atom'], [_228444|_228446], [], _160334)
^  Call: (264) [user] subst_vars('Atom', _228444, [], _229384)
^  Unify: (264) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (265) [system] var('Atom')
^  Redo: (264) [user] subst_vars('Atom', _228444, [], _229384)
^  Unify: (264) [user] subst_vars('Atom', _228444, [], _229384)
   Call: (265) [system] atom('Atom')
   Exit: (265) [system] atom('Atom')
^  Call: (265) [user] symbol_concat($, _235902, 'Atom')
^  Unify: (265) [user] symbol_concat($, _235902, 'Atom')
   Call: (266) [system] atom_concat($, _235902, 'Atom')
   Fail: (266) [system] atom_concat($, _235902, 'Atom')
^  Fail: (265) [user] symbol_concat($, _235902, 'Atom')
^  Redo: (264) [user] subst_vars('Atom', _228444, [], _229384)
^  Unify: (264) [user] subst_vars('Atom', _228444, [], _229384)
   Call: (265) [system] compound('Atom')
^  Redo: (264) [user] subst_vars('Atom', _228444, [], _229384)
^  Unify: (264) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (264) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (264) [user] subst_vars(['Atom'], _228446, [], _160334)
^  Unify: (264) [user] subst_vars(['Atom'], ['Atom'], [], [])
   Call: (265) [system] var(['Atom'])
^  Redo: (264) [user] subst_vars(['Atom'], _228446, [], _160334)
^  Unify: (264) [user] subst_vars(['Atom'], [_249902|_249904], [], _160334)
^  Call: (265) [user] subst_vars('Atom', _249902, [], _250842)
^  Unify: (265) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (266) [system] var('Atom')
^  Redo: (265) [user] subst_vars('Atom', _249902, [], _250842)
^  Unify: (265) [user] subst_vars('Atom', _249902, [], _250842)
   Call: (266) [system] atom('Atom')
   Exit: (266) [system] atom('Atom')
^  Call: (266) [user] symbol_concat($, _257360, 'Atom')
^  Unify: (266) [user] symbol_concat($, _257360, 'Atom')
   Call: (267) [system] atom_concat($, _257360, 'Atom')
   Fail: (267) [system] atom_concat($, _257360, 'Atom')
^  Fail: (266) [user] symbol_concat($, _257360, 'Atom')
^  Redo: (265) [user] subst_vars('Atom', _249902, [], _250842)
^  Unify: (265) [user] subst_vars('Atom', _249902, [], _250842)
   Call: (266) [system] compound('Atom')
^  Redo: (265) [user] subst_vars('Atom', _249902, [], _250842)
^  Unify: (265) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (265) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (265) [user] subst_vars([], _249904, [], _160334)
^  Unify: (265) [user] subst_vars([], [], [], [])
   Call: (266) [system] var([])
^  Redo: (265) [user] subst_vars([], _249904, [], _160334)
^  Unify: (265) [user] subst_vars([], [], [], [])
^  Exit: (265) [user] subst_vars([], [], [], [])
^  Exit: (264) [user] subst_vars(['Atom'], ['Atom'], [], [])
^  Exit: (263) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
^  Exit: (262) [user] subst_vars(['Variable', 'Atom', 'Atom'], ['Variable', 'Atom', 'Atom'], [], [])
^  Exit: (261) [user] subst_vars(['Atom', 'Variable', 'Atom', 'Atom'], ['Atom', 'Variable', 'Atom', 'Atom'], [], [])
^  Exit: (260) [user] subst_vars([->, 'Atom', 'Variable', 'Atom', 'Atom'], [->, 'Atom', 'Variable', 'Atom', 'Atom'], [], [])
^  Call: (260) [user] subst_vars([], _159396, [], _112742)
^  Unify: (260) [user] subst_vars([], [], [], [])
   Call: (261) [system] var([])
^  Redo: (260) [user] subst_vars([], _159396, [], _112742)
^  Unify: (260) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([], [], [], [])
^  Exit: (259) [user] subst_vars([[->, 'Atom', 'Variable', 'Atom', 'Atom']], [[->, 'Atom', 'Variable', 'Atom', 'Atom']], [], [])
^  Exit: (258) [user] subst_vars([apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], [])
^  Exit: (257) [user] subst_vars([:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], [])
   Call: (257) [system] _286322=metta_file_buffer(+, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(619, 21, 14, 619))
   Exit: (257) [system] metta_file_buffer(+, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(619, 21, 14, 619))=metta_file_buffer(+, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(619, 21, 14, 619))
^  Call: (257) [user] assertz(metta_file_buffer(+, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(619, 21, 14, 619)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(619, 21, 14, 619)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(619, 21, 14, 619))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(619, 21, 14, 619))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(619, 21, 14, 619))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, apply, [->, 'Atom', 'Variable', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(619, 21, 14, 619))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
   Redo: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _337116)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _338054))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _338054)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 659)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _337116)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _337116)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_337116))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_337116))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_337116))
   Exit: (259) [system] nonvar(position(_337116))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(659, 23, 38, 659)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(659, 23, 38, 659))
   Call: (257) [user] current_read_mode(file, _357534)
   Unify: (257) [user] current_read_mode(file, _357534)
   Call: (258) [system] nb_current(file_mode, _357534)
   Redo: (257) [user] current_read_mode(file, _357534)
   Call: (258) [system] _357534=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _363984)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _363984)
^  Call: (258) [user] clause(t_l:s_reader_info(_363984), _365930, _365852)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _363984)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _363984)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _363984)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _363984)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _363984)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _363984)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _363984)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _363984)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _379760)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (260) [system] char_type('\n', space)
   Exit: (260) [system] char_type('\n', space)
   Call: (260) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (260) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _363984)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _363984)
   Call: (261) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _363984)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _363984)
   Call: (261) [system] peek_char((0x55aefe44e2f0), _389966)
   Exit: (261) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (261) [system] char_type('(', space)
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _363984)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _363984)
^  Call: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (262) [system] string((0x55aefe44e2f0))
^  Redo: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _363984)
^  Unify: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _363984)
^  Call: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _363984)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _363984)
   Call: (263) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _363984)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _363984)
   Call: (263) [system] peek_char((0x55aefe44e2f0), _405720)
   Exit: (263) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (263) [system] char_type('(', space)
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _363984)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _363984)
   Call: (263) [system] _410362=(0x55aefe44e2f0)
   Exit: (263) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (263) [user] once((read_position((0x55aefe44e2f0), _412230, _412232, _412234, _412236), read_sexpr((0x55aefe44e2f0), _412248), assertz(metta_file_comment(_412230, _412232, _412234, _412248, _412236))))
^  Unify: (263) [system] once(user:(read_position((0x55aefe44e2f0), _412230, _412232, _412234, _412236), read_sexpr((0x55aefe44e2f0), _412248), assertz(metta_file_comment(_412230, _412232, _412234, _412248, _412236))))
^  Call: (265) [user] read_position((0x55aefe44e2f0), _412230, _412232, _412234, _412236)
^  Unify: (265) [user] read_position((0x55aefe44e2f0), _412230, _412232, _412234, _412236)
   Call: (266) [system] stream_property((0x55aefe44e2f0), position(_412236))
   Unify: (266) [system] stream_property((0x55aefe44e2f0), position(_412236))
   Call: (267) [system] nonvar((0x55aefe44e2f0))
   Exit: (267) [system] nonvar((0x55aefe44e2f0))
   Call: (267) [system] nonvar(position(_412236))
   Exit: (267) [system] nonvar(position(_412236))
   Exit: (266) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(660, 24, 0, 660)))
   Call: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(660, 24, 0, 660), _412230)
   Unify: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(660, 24, 0, 660), _412230)
   Call: (267) [system] nonvar(line_count)
   Exit: (267) [system] nonvar(line_count)
   Call: (267) [$syspreds] stream_position_field(line_count, _426218)
   Unify: (267) [$syspreds] stream_position_field(line_count, 2)
   Exit: (267) [$syspreds] stream_position_field(line_count, 2)
   Call: (267) [system] arg(2, '$stream_position'(660, 24, 0, 660), _412230)
   Exit: (267) [system] arg(2, '$stream_position'(660, 24, 0, 660), 24)
   Exit: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(660, 24, 0, 660), 24)
   Call: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(660, 24, 0, 660), _412232)
   Unify: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(660, 24, 0, 660), _412232)
   Call: (267) [system] nonvar(line_position)
   Exit: (267) [system] nonvar(line_position)
   Call: (267) [$syspreds] stream_position_field(line_position, _435512)
   Unify: (267) [$syspreds] stream_position_field(line_position, 3)
   Exit: (267) [$syspreds] stream_position_field(line_position, 3)
   Call: (267) [system] arg(3, '$stream_position'(660, 24, 0, 660), _412232)
   Exit: (267) [system] arg(3, '$stream_position'(660, 24, 0, 660), 0)
   Exit: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(660, 24, 0, 660), 0)
   Call: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(660, 24, 0, 660), _412234)
   Unify: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(660, 24, 0, 660), _412234)
   Call: (267) [system] nonvar(char_count)
   Exit: (267) [system] nonvar(char_count)
   Call: (267) [$syspreds] stream_position_field(char_count, _444806)
   Unify: (267) [$syspreds] stream_position_field(char_count, 1)
   Exit: (267) [$syspreds] stream_position_field(char_count, 1)
   Call: (267) [system] arg(1, '$stream_position'(660, 24, 0, 660), _412234)
   Exit: (267) [system] arg(1, '$stream_position'(660, 24, 0, 660), 660)
   Exit: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(660, 24, 0, 660), 660)
^  Exit: (265) [user] read_position((0x55aefe44e2f0), 24, 0, 660, '$stream_position'(660, 24, 0, 660))
^  Call: (265) [user] read_sexpr((0x55aefe44e2f0), _412248)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _412248)
   Call: (266) [system] string((0x55aefe44e2f0))
^  Redo: (265) [user] read_sexpr((0x55aefe44e2f0), _412248)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _412248)
^  Call: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _412248)
^  Unify: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _412248)
^  Call: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _459676)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (268) [system] '('=(;)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', 'white')
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', end_of_line)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', space)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', cntrl)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (267) [system] get_char((0x55aefe44e2f0), _476460)
   Exit: (267) [system] get_char((0x55aefe44e2f0), '(')
   Call: (267) [system] '('='('
   Exit: (267) [system] '('='('
^  Call: (267) [user] read_list(')', (0x55aefe44e2f0), _412248)
^  Unify: (267) [user] read_list(')', (0x55aefe44e2f0), _412248)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _483886)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), =)
   Call: (269) [system] (=)=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space(=)
^  Unify: (269) [user] is_like_space(=)
   Call: (270) [system] char_type(=, 'white')
^  Redo: (269) [user] is_like_space(=)
^  Unify: (269) [user] is_like_space(=)
   Call: (270) [system] char_type(=, end_of_line)
^  Redo: (269) [user] is_like_space(=)
^  Unify: (269) [user] is_like_space(=)
   Call: (270) [system] char_type(=, space)
^  Redo: (269) [user] is_like_space(=)
^  Unify: (269) [user] is_like_space(=)
   Call: (270) [system] char_type(=, cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _500670)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), =)
   Call: (268) [system] (=)=')'
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _412248)
   Call: (268) [system] (=)=end_of_file
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _412248)
^  Call: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _506248)
^  Unify: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _506248)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _509962)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), =)
   Call: (270) [system] (=)=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(=)
^  Unify: (270) [user] is_like_space(=)
   Call: (271) [system] char_type(=, 'white')
^  Redo: (270) [user] is_like_space(=)
^  Unify: (270) [user] is_like_space(=)
   Call: (271) [system] char_type(=, end_of_line)
^  Redo: (270) [user] is_like_space(=)
^  Unify: (270) [user] is_like_space(=)
   Call: (271) [system] char_type(=, space)
^  Redo: (270) [user] is_like_space(=)
^  Unify: (270) [user] is_like_space(=)
   Call: (271) [system] char_type(=, cntrl)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] get_char((0x55aefe44e2f0), _8702)
   Exit: (269) [system] get_char((0x55aefe44e2f0), =)
   Call: (269) [system] (=)='('
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _5980)
   Call: (269) [system] (=)='['
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _5980)
   Call: (269) [system] (=)='{'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _5980)
   Call: (269) [system] (=)='"'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _5980)
   Call: (269) [system] (=)=!
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _5980)
   Call: (269) [system] (=)='\''
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _5980)
   Call: (269) [system] (=)='`'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _5980)
   Call: (269) [system] (=)=end_of_file
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _5980)
^  Call: (269) [user] read_symbolic(')', (0x55aefe44e2f0), =, _5980)
^  Unify: (269) [user] read_symbolic(')', (0x55aefe44e2f0), =, _5980)
^  Call: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _27312)
^  Unify: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _27312)
   Call: (271) [system] peek_char((0x55aefe44e2f0), _29178)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] is_delimiter(' ')
^  Unify: (271) [user] is_delimiter(' ')
   Call: (272) [system] char_type(' ', space)
   Exit: (272) [system] char_type(' ', space)
^  Exit: (271) [user] is_delimiter(' ')
   Call: (271) [system] _27312=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (270) [user] classify_and_convert_charseq(=, [], _5980)
^  Unify: (270) [user] classify_and_convert_charseq(=, [], _5980)
^  Call: (272) [system] setup_call_cleanup('$notrace'(_40344, _40346), once(user:catch(read_from_chars([=], _5980), _40320, fail)), '$restore_trace'(_40344, _40346))
^  Unify: (272) [system] setup_call_cleanup(system:'$notrace'(_40344, _40346), system:once(user:catch(read_from_chars([=], _5980), _40320, fail)), system:'$restore_trace'(_40344, _40346))
^  Call: (273) [system] sig_atomic(system:'$notrace'(_40344, _40346))
^  Exit: (272) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([=], =), _40320, fail)), system:'$restore_trace'(3, -1))
   Call: (271) [system] atomic(=)
   Exit: (271) [system] atomic(=)
^  Exit: (270) [user] classify_and_convert_charseq(=, [], =)
^  Exit: (269) [user] read_symbolic(')', (0x55aefe44e2f0), =, =)
^  Exit: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), =)
^  Call: (268) [user] read_list(')', (0x55aefe44e2f0), _48782)
^  Unify: (268) [user] read_list(')', (0x55aefe44e2f0), _48782)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _52496)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (270) [system] ' '=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(' ')
^  Unify: (270) [user] is_like_space(' ')
   Call: (271) [system] char_type(' ', 'white')
   Exit: (271) [system] char_type(' ', 'white')
^  Exit: (270) [user] is_like_space(' ')
   Call: (270) [system] get_char((0x55aefe44e2f0), _61154)
   Exit: (270) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _64782)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', 'white')
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', end_of_line)
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', space)
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _82490)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (269) [system] '('=')'
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _48782)
   Call: (269) [system] '('=end_of_file
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _48782)
^  Call: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _88068)
^  Unify: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _88068)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _91782)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', 'white')
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', end_of_line)
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', space)
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] get_char((0x55aefe44e2f0), _108566)
   Exit: (270) [system] get_char((0x55aefe44e2f0), '(')
   Call: (270) [system] '('='('
   Exit: (270) [system] '('='('
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _88068)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _88068)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _115992)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), a)
   Call: (272) [system] a=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(a)
^  Unify: (272) [user] is_like_space(a)
   Call: (273) [system] char_type(a, 'white')
^  Redo: (272) [user] is_like_space(a)
^  Unify: (272) [user] is_like_space(a)
   Call: (273) [system] char_type(a, end_of_line)
^  Redo: (272) [user] is_like_space(a)
^  Unify: (272) [user] is_like_space(a)
   Call: (273) [system] char_type(a, space)
^  Redo: (272) [user] is_like_space(a)
^  Unify: (272) [user] is_like_space(a)
   Call: (273) [system] char_type(a, cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _132776)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), a)
   Call: (271) [system] a=')'
^  Redo: (270) [user] read_list(')', (0x55aefe44e2f0), _88068)
   Call: (271) [system] a=end_of_file
^  Redo: (270) [user] read_list(')', (0x55aefe44e2f0), _88068)
^  Call: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _138354)
^  Unify: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _138354)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _142068)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), a)
   Call: (273) [system] a=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(a)
^  Unify: (273) [user] is_like_space(a)
   Call: (274) [system] char_type(a, 'white')
^  Redo: (273) [user] is_like_space(a)
^  Unify: (273) [user] is_like_space(a)
   Call: (274) [system] char_type(a, end_of_line)
^  Redo: (273) [user] is_like_space(a)
^  Unify: (273) [user] is_like_space(a)
   Call: (274) [system] char_type(a, space)
^  Redo: (273) [user] is_like_space(a)
^  Unify: (273) [user] is_like_space(a)
   Call: (274) [system] char_type(a, cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] get_char((0x55aefe44e2f0), _158852)
   Exit: (272) [system] get_char((0x55aefe44e2f0), a)
   Call: (272) [system] a='('
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _138354)
   Call: (272) [system] a='['
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _138354)
   Call: (272) [system] a='{'
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _138354)
   Call: (272) [system] a='"'
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _138354)
   Call: (272) [system] a=!
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _138354)
   Call: (272) [system] a='\''
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _138354)
   Call: (272) [system] a='`'
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _138354)
   Call: (272) [system] a=end_of_file
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _138354)
^  Call: (272) [user] read_symbolic(')', (0x55aefe44e2f0), a, _138354)
^  Unify: (272) [user] read_symbolic(')', (0x55aefe44e2f0), a, _138354)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _177462)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _177462)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _179328)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (274) [user] is_delimiter(p)
^  Unify: (274) [user] is_delimiter(p)
   Call: (275) [system] char_type(p, space)
^  Redo: (274) [user] is_delimiter(p)
   Call: (275) [system] arg(_184968, v('(', ')', end_of_file), p)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _177462)
   Call: (274) [system] ')'==p
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _177462)
   Call: (274) [system] get_char((0x55aefe44e2f0), p)
   Exit: (274) [system] get_char((0x55aefe44e2f0), p)
   Call: (274) [system] p=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _177462)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _192334)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _192334)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _194200)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (275) [user] is_delimiter(p)
^  Unify: (275) [user] is_delimiter(p)
   Call: (276) [system] char_type(p, space)
^  Redo: (275) [user] is_delimiter(p)
   Call: (276) [system] arg(_199840, v('(', ')', end_of_file), p)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _192334)
   Call: (275) [system] ')'==p
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _192334)
   Call: (275) [system] get_char((0x55aefe44e2f0), p)
   Exit: (275) [system] get_char((0x55aefe44e2f0), p)
   Call: (275) [system] p=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _192334)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _207206)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _207206)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _209072)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (276) [user] is_delimiter(l)
^  Unify: (276) [user] is_delimiter(l)
   Call: (277) [system] char_type(l, space)
^  Redo: (276) [user] is_delimiter(l)
   Call: (277) [system] arg(_214712, v('(', ')', end_of_file), l)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _207206)
   Call: (276) [system] ')'==l
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _207206)
   Call: (276) [system] get_char((0x55aefe44e2f0), l)
   Exit: (276) [system] get_char((0x55aefe44e2f0), l)
   Call: (276) [system] l=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _207206)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _222078)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _222078)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _223944)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), y)
^  Call: (277) [user] is_delimiter(y)
^  Unify: (277) [user] is_delimiter(y)
   Call: (278) [system] char_type(y, space)
^  Redo: (277) [user] is_delimiter(y)
   Call: (278) [system] arg(_229584, v('(', ')', end_of_file), y)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _222078)
   Call: (277) [system] ')'==y
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _222078)
   Call: (277) [system] get_char((0x55aefe44e2f0), y)
   Exit: (277) [system] get_char((0x55aefe44e2f0), y)
   Call: (277) [system] y=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _222078)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _236950)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _236950)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _238816)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (278) [user] is_delimiter(' ')
^  Unify: (278) [user] is_delimiter(' ')
   Call: (279) [system] char_type(' ', space)
   Exit: (279) [system] char_type(' ', space)
^  Exit: (278) [user] is_delimiter(' ')
   Call: (278) [system] _236950=[]
   Exit: (278) [system] []=[]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (277) [system] _222078=[y]
   Exit: (277) [system] [y]=[y]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [y])
   Call: (276) [system] _207206=[l, y]
   Exit: (276) [system] [l, y]=[l, y]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l, y])
   Call: (275) [system] _192334=[p, l, y]
   Exit: (275) [system] [p, l, y]=[p, l, y]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, l, y])
   Call: (274) [system] _177462=[p, p, l, y]
   Exit: (274) [system] [p, p, l, y]=[p, p, l, y]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, p, l, y])
^  Call: (273) [user] classify_and_convert_charseq(a, [p, p, l, y], _138354)
^  Unify: (273) [user] classify_and_convert_charseq(a, [p, p, l, y], _138354)
^  Call: (275) [system] setup_call_cleanup('$notrace'(_261158, _261160), once(user:catch(read_from_chars([a, p, p, l, y], _138354), _261134, fail)), '$restore_trace'(_261158, _261160))
^  Unify: (275) [system] setup_call_cleanup(system:'$notrace'(_261158, _261160), system:once(user:catch(read_from_chars([a, p, p, l, y], _138354), _261134, fail)), system:'$restore_trace'(_261158, _261160))
^  Call: (276) [system] sig_atomic(system:'$notrace'(_261158, _261160))
^  Exit: (275) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([a, p, p, l, y], apply), _261134, fail)), system:'$restore_trace'(3, -1))
   Call: (274) [system] atomic(apply)
   Exit: (274) [system] atomic(apply)
^  Exit: (273) [user] classify_and_convert_charseq(a, [p, p, l, y], apply)
^  Exit: (272) [user] read_symbolic(')', (0x55aefe44e2f0), a, apply)
^  Exit: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), apply)
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _269596)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _269596)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _273310)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (273) [system] ' '=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(' ')
^  Unify: (273) [user] is_like_space(' ')
   Call: (274) [system] char_type(' ', 'white')
   Exit: (274) [system] char_type(' ', 'white')
^  Exit: (273) [user] is_like_space(' ')
   Call: (273) [system] get_char((0x55aefe44e2f0), _281968)
   Exit: (273) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _285596)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), $)
   Call: (274) [system] ($)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, 'white')
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, end_of_line)
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, space)
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _303304)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), $)
   Call: (272) [system] ($)=')'
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _269596)
   Call: (272) [system] ($)=end_of_file
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _269596)
^  Call: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _308882)
^  Unify: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _308882)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _312596)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), $)
   Call: (274) [system] ($)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, 'white')
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, end_of_line)
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, space)
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] get_char((0x55aefe44e2f0), _329380)
   Exit: (273) [system] get_char((0x55aefe44e2f0), $)
   Call: (273) [system] ($)='('
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _308882)
   Call: (273) [system] ($)='['
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _308882)
   Call: (273) [system] ($)='{'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _308882)
   Call: (273) [system] ($)='"'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _308882)
   Call: (273) [system] ($)=!
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _308882)
   Call: (273) [system] ($)='\''
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _308882)
   Call: (273) [system] ($)='`'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _308882)
   Call: (273) [system] ($)=end_of_file
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _308882)
^  Call: (273) [user] read_symbolic(')', (0x55aefe44e2f0), $, _308882)
^  Unify: (273) [user] read_symbolic(')', (0x55aefe44e2f0), $, _308882)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _347990)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _347990)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _349856)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (275) [user] is_delimiter(a)
^  Unify: (275) [user] is_delimiter(a)
   Call: (276) [system] char_type(a, space)
^  Redo: (275) [user] is_delimiter(a)
   Call: (276) [system] arg(_355496, v('(', ')', end_of_file), a)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _347990)
   Call: (275) [system] ')'==a
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _347990)
   Call: (275) [system] get_char((0x55aefe44e2f0), a)
   Exit: (275) [system] get_char((0x55aefe44e2f0), a)
   Call: (275) [system] a=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _347990)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _362862)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _362862)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _364728)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (276) [user] is_delimiter(t)
^  Unify: (276) [user] is_delimiter(t)
   Call: (277) [system] char_type(t, space)
^  Redo: (276) [user] is_delimiter(t)
   Call: (277) [system] arg(_370368, v('(', ')', end_of_file), t)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _362862)
   Call: (276) [system] ')'==t
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _362862)
   Call: (276) [system] get_char((0x55aefe44e2f0), t)
   Exit: (276) [system] get_char((0x55aefe44e2f0), t)
   Call: (276) [system] t=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _362862)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _377734)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _377734)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _379600)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (277) [user] is_delimiter(o)
^  Unify: (277) [user] is_delimiter(o)
   Call: (278) [system] char_type(o, space)
^  Redo: (277) [user] is_delimiter(o)
   Call: (278) [system] arg(_385240, v('(', ')', end_of_file), o)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _377734)
   Call: (277) [system] ')'==o
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _377734)
   Call: (277) [system] get_char((0x55aefe44e2f0), o)
   Exit: (277) [system] get_char((0x55aefe44e2f0), o)
   Call: (277) [system] o=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _377734)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _392606)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _392606)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _394472)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (278) [user] is_delimiter(m)
^  Unify: (278) [user] is_delimiter(m)
   Call: (279) [system] char_type(m, space)
^  Redo: (278) [user] is_delimiter(m)
   Call: (279) [system] arg(_400112, v('(', ')', end_of_file), m)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _392606)
   Call: (278) [system] ')'==m
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _392606)
   Call: (278) [system] get_char((0x55aefe44e2f0), m)
   Exit: (278) [system] get_char((0x55aefe44e2f0), m)
   Call: (278) [system] m=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _392606)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _407478)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _407478)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _409344)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (279) [user] is_delimiter(' ')
^  Unify: (279) [user] is_delimiter(' ')
   Call: (280) [system] char_type(' ', space)
   Exit: (280) [system] char_type(' ', space)
^  Exit: (279) [user] is_delimiter(' ')
   Call: (279) [system] _407478=[]
   Exit: (279) [system] []=[]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (278) [system] _392606=[m]
   Exit: (278) [system] [m]=[m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (277) [system] _377734=[o, m]
   Exit: (277) [system] [o, m]=[o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (276) [system] _362862=[t, o, m]
   Exit: (276) [system] [t, o, m]=[t, o, m]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
   Call: (275) [system] _347990=[a, t, o, m]
   Exit: (275) [system] [a, t, o, m]=[a, t, o, m]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, t, o, m])
^  Call: (274) [user] classify_and_convert_charseq($, [a, t, o, m], _308882)
^  Unify: (274) [user] classify_and_convert_charseq($, [a, t, o, m], '$VAR'(_430728))
   Call: (275) [system] atom_chars(_430728, ['_', a, t, o, m])
   Exit: (275) [system] atom_chars('_atom', ['_', a, t, o, m])
^  Exit: (274) [user] classify_and_convert_charseq($, [a, t, o, m], _atom)
^  Exit: (273) [user] read_symbolic(')', (0x55aefe44e2f0), $, _atom)
^  Exit: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _atom)
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _436324)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _436324)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _440038)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (274) [system] ' '=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(' ')
^  Unify: (274) [user] is_like_space(' ')
   Call: (275) [system] char_type(' ', 'white')
   Exit: (275) [system] char_type(' ', 'white')
^  Exit: (274) [user] is_like_space(' ')
   Call: (274) [system] get_char((0x55aefe44e2f0), _448696)
   Exit: (274) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _452324)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), $)
   Call: (275) [system] ($)=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, 'white')
^  Redo: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, end_of_line)
^  Redo: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, space)
^  Redo: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _470032)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), $)
   Call: (273) [system] ($)=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _436324)
   Call: (273) [system] ($)=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _436324)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _475610)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _475610)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _479324)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), $)
   Call: (275) [system] ($)=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, 'white')
^  Redo: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, end_of_line)
^  Redo: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, space)
^  Redo: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _496108)
   Exit: (274) [system] get_char((0x55aefe44e2f0), $)
   Call: (274) [system] ($)='('
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _475610)
   Call: (274) [system] ($)='['
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _475610)
   Call: (274) [system] ($)='{'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _475610)
   Call: (274) [system] ($)='"'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _475610)
   Call: (274) [system] ($)=!
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _475610)
   Call: (274) [system] ($)='\''
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _475610)
   Call: (274) [system] ($)='`'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _475610)
   Call: (274) [system] ($)=end_of_file
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _475610)
^  Call: (274) [user] read_symbolic(')', (0x55aefe44e2f0), $, _475610)
^  Unify: (274) [user] read_symbolic(')', (0x55aefe44e2f0), $, _475610)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _514718)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _514718)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _516584)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), v)
^  Call: (276) [user] is_delimiter(v)
^  Unify: (276) [user] is_delimiter(v)
   Call: (277) [system] char_type(v, space)
^  Redo: (276) [user] is_delimiter(v)
   Call: (277) [system] arg(_522224, v('(', ')', end_of_file), v)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _514718)
   Call: (276) [system] ')'==v
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6012)
   Call: (276) [system] get_char((0x55aefe44e2f0), v)
   Exit: (276) [system] get_char((0x55aefe44e2f0), v)
   Call: (276) [system] v=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6012)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _11540)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _11540)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _13406)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (277) [user] is_delimiter(a)
^  Unify: (277) [user] is_delimiter(a)
   Call: (278) [system] char_type(a, space)
^  Redo: (277) [user] is_delimiter(a)
   Call: (278) [system] arg(_19046, v('(', ')', end_of_file), a)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _11540)
   Call: (277) [system] ')'==a
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _11540)
   Call: (277) [system] get_char((0x55aefe44e2f0), a)
   Exit: (277) [system] get_char((0x55aefe44e2f0), a)
   Call: (277) [system] a=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _11540)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _26412)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _26412)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _28278)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (278) [user] is_delimiter(r)
^  Unify: (278) [user] is_delimiter(r)
   Call: (279) [system] char_type(r, space)
^  Redo: (278) [user] is_delimiter(r)
   Call: (279) [system] arg(_33918, v('(', ')', end_of_file), r)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _26412)
   Call: (278) [system] ')'==r
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _26412)
   Call: (278) [system] get_char((0x55aefe44e2f0), r)
   Exit: (278) [system] get_char((0x55aefe44e2f0), r)
   Call: (278) [system] r=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _26412)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _41284)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _41284)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _43150)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (279) [user] is_delimiter(' ')
^  Unify: (279) [user] is_delimiter(' ')
   Call: (280) [system] char_type(' ', space)
   Exit: (280) [system] char_type(' ', space)
^  Exit: (279) [user] is_delimiter(' ')
   Call: (279) [system] _41284=[]
   Exit: (279) [system] []=[]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (278) [system] _26412=[r]
   Exit: (278) [system] [r]=[r]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r])
   Call: (277) [system] _11540=[a, r]
   Exit: (277) [system] [a, r]=[a, r]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, r])
   Call: (276) [system] _6012=[v, a, r]
   Exit: (276) [system] [v, a, r]=[v, a, r]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [v, a, r])
^  Call: (275) [user] classify_and_convert_charseq($, [v, a, r], _6008)
^  Unify: (275) [user] classify_and_convert_charseq($, [v, a, r], '$VAR'(_61740))
   Call: (276) [system] atom_chars(_61740, ['_', v, a, r])
   Exit: (276) [system] atom_chars('_var', ['_', v, a, r])
^  Exit: (275) [user] classify_and_convert_charseq($, [v, a, r], _var)
^  Exit: (274) [user] read_symbolic(')', (0x55aefe44e2f0), $, _var)
^  Exit: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _var)
^  Call: (273) [user] read_list(')', (0x55aefe44e2f0), _67336)
^  Unify: (273) [user] read_list(')', (0x55aefe44e2f0), _67336)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _71050)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (275) [system] ' '=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(' ')
^  Unify: (275) [user] is_like_space(' ')
   Call: (276) [system] char_type(' ', 'white')
   Exit: (276) [system] char_type(' ', 'white')
^  Exit: (275) [user] is_like_space(' ')
   Call: (275) [system] get_char((0x55aefe44e2f0), _79708)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _83336)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), $)
   Call: (276) [system] ($)=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, 'white')
^  Redo: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, end_of_line)
^  Redo: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, space)
^  Redo: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _101044)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), $)
   Call: (274) [system] ($)=')'
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _67336)
   Call: (274) [system] ($)=end_of_file
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _67336)
^  Call: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _106622)
^  Unify: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _106622)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _110336)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), $)
   Call: (276) [system] ($)=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, 'white')
^  Redo: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, end_of_line)
^  Redo: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, space)
^  Redo: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] get_char((0x55aefe44e2f0), _127120)
   Exit: (275) [system] get_char((0x55aefe44e2f0), $)
   Call: (275) [system] ($)='('
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _106622)
   Call: (275) [system] ($)='['
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _106622)
   Call: (275) [system] ($)='{'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _106622)
   Call: (275) [system] ($)='"'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _106622)
   Call: (275) [system] ($)=!
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _106622)
   Call: (275) [system] ($)='\''
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _106622)
   Call: (275) [system] ($)='`'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _106622)
   Call: (275) [system] ($)=end_of_file
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _106622)
^  Call: (275) [user] read_symbolic(')', (0x55aefe44e2f0), $, _106622)
^  Unify: (275) [user] read_symbolic(')', (0x55aefe44e2f0), $, _106622)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _145730)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _145730)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _147596)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (277) [user] is_delimiter(t)
^  Unify: (277) [user] is_delimiter(t)
   Call: (278) [system] char_type(t, space)
^  Redo: (277) [user] is_delimiter(t)
   Call: (278) [system] arg(_153236, v('(', ')', end_of_file), t)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _145730)
   Call: (277) [system] ')'==t
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _145730)
   Call: (277) [system] get_char((0x55aefe44e2f0), t)
   Exit: (277) [system] get_char((0x55aefe44e2f0), t)
   Call: (277) [system] t=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _145730)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _160602)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _160602)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _162468)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (278) [user] is_delimiter(e)
^  Unify: (278) [user] is_delimiter(e)
   Call: (279) [system] char_type(e, space)
^  Redo: (278) [user] is_delimiter(e)
   Call: (279) [system] arg(_168108, v('(', ')', end_of_file), e)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _160602)
   Call: (278) [system] ')'==e
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _160602)
   Call: (278) [system] get_char((0x55aefe44e2f0), e)
   Exit: (278) [system] get_char((0x55aefe44e2f0), e)
   Call: (278) [system] e=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _160602)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _175474)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _175474)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _177340)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (279) [user] is_delimiter(m)
^  Unify: (279) [user] is_delimiter(m)
   Call: (280) [system] char_type(m, space)
^  Redo: (279) [user] is_delimiter(m)
   Call: (280) [system] arg(_182980, v('(', ')', end_of_file), m)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _175474)
   Call: (279) [system] ')'==m
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _175474)
   Call: (279) [system] get_char((0x55aefe44e2f0), m)
   Exit: (279) [system] get_char((0x55aefe44e2f0), m)
   Call: (279) [system] m=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _175474)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _190346)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _190346)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _192212)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (280) [user] is_delimiter(p)
^  Unify: (280) [user] is_delimiter(p)
   Call: (281) [system] char_type(p, space)
^  Redo: (280) [user] is_delimiter(p)
   Call: (281) [system] arg(_197852, v('(', ')', end_of_file), p)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _190346)
   Call: (280) [system] ')'==p
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _190346)
   Call: (280) [system] get_char((0x55aefe44e2f0), p)
   Exit: (280) [system] get_char((0x55aefe44e2f0), p)
   Call: (280) [system] p=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _190346)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _205218)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _205218)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _207084)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (281) [user] is_delimiter(l)
^  Unify: (281) [user] is_delimiter(l)
   Call: (282) [system] char_type(l, space)
^  Redo: (281) [user] is_delimiter(l)
   Call: (282) [system] arg(_212724, v('(', ')', end_of_file), l)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _205218)
   Call: (281) [system] ')'==l
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _205218)
   Call: (281) [system] get_char((0x55aefe44e2f0), l)
   Exit: (281) [system] get_char((0x55aefe44e2f0), l)
   Call: (281) [system] l=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _205218)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _220090)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _220090)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _221956)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (282) [user] is_delimiter(')')
^  Unify: (282) [user] is_delimiter(')')
   Call: (283) [system] char_type(')', space)
^  Redo: (282) [user] is_delimiter(')')
   Call: (283) [system] arg(_227596, v('(', ')', end_of_file), ')')
   Exit: (283) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (282) [user] is_delimiter(')')
   Call: (282) [system] _220090=[]
   Exit: (282) [system] []=[]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (281) [system] _205218=[l]
   Exit: (281) [system] [l]=[l]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l])
   Call: (280) [system] _190346=[p, l]
   Exit: (280) [system] [p, l]=[p, l]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, l])
   Call: (279) [system] _175474=[m, p, l]
   Exit: (279) [system] [m, p, l]=[m, p, l]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m, p, l])
   Call: (278) [system] _160602=[e, m, p, l]
   Exit: (278) [system] [e, m, p, l]=[e, m, p, l]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, m, p, l])
   Call: (277) [system] _145730=[t, e, m, p, l]
   Exit: (277) [system] [t, e, m, p, l]=[t, e, m, p, l]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, e, m, p, l])
^  Call: (276) [user] classify_and_convert_charseq($, [t, e, m, p, l], _106622)
^  Unify: (276) [user] classify_and_convert_charseq($, [t, e, m, p, l], '$VAR'(_248002))
   Call: (277) [system] atom_chars(_248002, ['_', t, e, m, p, l])
   Exit: (277) [system] atom_chars('_templ', ['_', t, e, m, p, l])
^  Exit: (276) [user] classify_and_convert_charseq($, [t, e, m, p, l], _templ)
^  Exit: (275) [user] read_symbolic(')', (0x55aefe44e2f0), $, _templ)
^  Exit: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _templ)
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _253598)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _253598)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _257312)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (276) [system] ')'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', 'white')
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', end_of_line)
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', space)
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _274096)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (275) [system] ')'=')'
   Exit: (275) [system] ')'=')'
   Call: (275) [system] get_char((0x55aefe44e2f0), _277886)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ')')
   Call: (275) [system] _253598=[]
   Exit: (275) [system] []=[]
^  Exit: (274) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (274) [system] _67336=[_templ]
   Exit: (274) [system] [_templ]=[_templ]
^  Exit: (273) [user] read_list(')', (0x55aefe44e2f0), [_templ])
   Call: (273) [system] _6004=[_var, _templ]
   Exit: (273) [system] [_var, _templ]=[_var, _templ]
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), [_var, _templ])
   Call: (272) [system] _5994=[_atom, _var, _templ]
   Exit: (272) [system] [_atom, _var, _templ]=[_atom, _var, _templ]
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [_atom, _var, _templ])
   Call: (271) [system] _5986=[apply, _atom, _var, _templ]
   Exit: (271) [system] [apply, _atom, _var, _templ]=[apply, _atom, _var, _templ]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [apply, _atom, _var, _templ])
^  Exit: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), [apply, _atom, _var, _templ])
^  Call: (269) [user] read_list(')', (0x55aefe44e2f0), _294562)
^  Unify: (269) [user] read_list(')', (0x55aefe44e2f0), _294562)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _298276)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (271) [system] '\n'=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space('\n')
^  Unify: (271) [user] is_like_space('\n')
   Call: (272) [system] char_type('\n', 'white')
^  Redo: (271) [user] is_like_space('\n')
^  Unify: (271) [user] is_like_space('\n')
   Call: (272) [system] char_type('\n', end_of_line)
   Exit: (272) [system] char_type('\n', end_of_line)
^  Exit: (271) [user] is_like_space('\n')
   Call: (271) [system] get_char((0x55aefe44e2f0), _309588)
   Exit: (271) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _313216)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (272) [system] ' '=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(' ')
^  Unify: (272) [user] is_like_space(' ')
   Call: (273) [system] char_type(' ', 'white')
   Exit: (273) [system] char_type(' ', 'white')
^  Exit: (272) [user] is_like_space(' ')
   Call: (272) [system] get_char((0x55aefe44e2f0), _321874)
   Exit: (272) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _325502)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (273) [system] ' '=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(' ')
^  Unify: (273) [user] is_like_space(' ')
   Call: (274) [system] char_type(' ', 'white')
   Exit: (274) [system] char_type(' ', 'white')
^  Exit: (273) [user] is_like_space(' ')
   Call: (273) [system] get_char((0x55aefe44e2f0), _334160)
   Exit: (273) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _337788)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (274) [system] '('=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space('(')
^  Unify: (274) [user] is_like_space('(')
   Call: (275) [system] char_type('(', 'white')
^  Redo: (274) [user] is_like_space('(')
^  Unify: (274) [user] is_like_space('(')
   Call: (275) [system] char_type('(', end_of_line)
^  Redo: (274) [user] is_like_space('(')
^  Unify: (274) [user] is_like_space('(')
   Call: (275) [system] char_type('(', space)
^  Redo: (274) [user] is_like_space('(')
^  Unify: (274) [user] is_like_space('(')
   Call: (275) [system] char_type('(', cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _357344)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (270) [system] '('=')'
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _294562)
   Call: (270) [system] '('=end_of_file
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _294562)
^  Call: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _362922)
^  Unify: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _362922)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _366636)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] get_char((0x55aefe44e2f0), _383420)
   Exit: (271) [system] get_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('='('
   Exit: (271) [system] '('='('
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _362922)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _362922)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _390846)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), f)
   Call: (273) [system] f=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(f)
^  Unify: (273) [user] is_like_space(f)
   Call: (274) [system] char_type(f, 'white')
^  Redo: (273) [user] is_like_space(f)
^  Unify: (273) [user] is_like_space(f)
   Call: (274) [system] char_type(f, end_of_line)
^  Redo: (273) [user] is_like_space(f)
^  Unify: (273) [user] is_like_space(f)
   Call: (274) [system] char_type(f, space)
^  Redo: (273) [user] is_like_space(f)
^  Unify: (273) [user] is_like_space(f)
   Call: (274) [system] char_type(f, cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _407630)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), f)
   Call: (272) [system] f=')'
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _362922)
   Call: (272) [system] f=end_of_file
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _362922)
^  Call: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _413208)
^  Unify: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _413208)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _416922)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), f)
   Call: (274) [system] f=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(f)
^  Unify: (274) [user] is_like_space(f)
   Call: (275) [system] char_type(f, 'white')
^  Redo: (274) [user] is_like_space(f)
^  Unify: (274) [user] is_like_space(f)
   Call: (275) [system] char_type(f, end_of_line)
^  Redo: (274) [user] is_like_space(f)
^  Unify: (274) [user] is_like_space(f)
   Call: (275) [system] char_type(f, space)
^  Redo: (274) [user] is_like_space(f)
^  Unify: (274) [user] is_like_space(f)
   Call: (275) [system] char_type(f, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] get_char((0x55aefe44e2f0), _433706)
   Exit: (273) [system] get_char((0x55aefe44e2f0), f)
   Call: (273) [system] f='('
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _413208)
   Call: (273) [system] f='['
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _413208)
   Call: (273) [system] f='{'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _413208)
   Call: (273) [system] f='"'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _413208)
   Call: (273) [system] f=!
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _413208)
   Call: (273) [system] f='\''
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _413208)
   Call: (273) [system] f='`'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _413208)
   Call: (273) [system] f=end_of_file
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _413208)
^  Call: (273) [user] read_symbolic(')', (0x55aefe44e2f0), f, _413208)
^  Unify: (273) [user] read_symbolic(')', (0x55aefe44e2f0), f, _413208)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _452316)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _452316)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _454182)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), u)
^  Call: (275) [user] is_delimiter(u)
^  Unify: (275) [user] is_delimiter(u)
   Call: (276) [system] char_type(u, space)
^  Redo: (275) [user] is_delimiter(u)
   Call: (276) [system] arg(_459822, v('(', ')', end_of_file), u)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _452316)
   Call: (275) [system] ')'==u
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _452316)
   Call: (275) [system] get_char((0x55aefe44e2f0), u)
   Exit: (275) [system] get_char((0x55aefe44e2f0), u)
   Call: (275) [system] u=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _452316)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _467188)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _467188)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _469054)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (276) [user] is_delimiter(n)
^  Unify: (276) [user] is_delimiter(n)
   Call: (277) [system] char_type(n, space)
^  Redo: (276) [user] is_delimiter(n)
   Call: (277) [system] arg(_474694, v('(', ')', end_of_file), n)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _467188)
   Call: (276) [system] ')'==n
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _467188)
   Call: (276) [system] get_char((0x55aefe44e2f0), n)
   Exit: (276) [system] get_char((0x55aefe44e2f0), n)
   Call: (276) [system] n=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _467188)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _482060)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _482060)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _483926)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), c)
^  Call: (277) [user] is_delimiter(c)
^  Unify: (277) [user] is_delimiter(c)
   Call: (278) [system] char_type(c, space)
^  Redo: (277) [user] is_delimiter(c)
   Call: (278) [system] arg(_489566, v('(', ')', end_of_file), c)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _482060)
   Call: (277) [system] ')'==c
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _482060)
   Call: (277) [system] get_char((0x55aefe44e2f0), c)
   Exit: (277) [system] get_char((0x55aefe44e2f0), c)
   Call: (277) [system] c=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _482060)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _496932)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _496932)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _498798)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (278) [user] is_delimiter(t)
^  Unify: (278) [user] is_delimiter(t)
   Call: (279) [system] char_type(t, space)
^  Redo: (278) [user] is_delimiter(t)
   Call: (279) [system] arg(_504438, v('(', ')', end_of_file), t)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _496932)
   Call: (278) [system] ')'==t
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _496932)
   Call: (278) [system] get_char((0x55aefe44e2f0), t)
   Exit: (278) [system] get_char((0x55aefe44e2f0), t)
   Call: (278) [system] t=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _496932)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _511804)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _511804)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _513670)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (279) [user] is_delimiter(i)
^  Unify: (279) [user] is_delimiter(i)
   Call: (280) [system] char_type(i, space)
^  Redo: (279) [user] is_delimiter(i)
   Call: (280) [system] arg(_519310, v('(', ')', end_of_file), i)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _511804)
   Call: (279) [system] ')'==i
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _511804)
   Call: (279) [system] get_char((0x55aefe44e2f0), i)
   Exit: (279) [system] get_char((0x55aefe44e2f0), i)
   Call: (279) [system] i=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6054)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _8718)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _8718)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _10584)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (280) [user] is_delimiter(o)
^  Unify: (280) [user] is_delimiter(o)
   Call: (281) [system] char_type(o, space)
^  Redo: (280) [user] is_delimiter(o)
   Call: (281) [system] arg(_16224, v('(', ')', end_of_file), o)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _8718)
   Call: (280) [system] ')'==o
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _8718)
   Call: (280) [system] get_char((0x55aefe44e2f0), o)
   Exit: (280) [system] get_char((0x55aefe44e2f0), o)
   Call: (280) [system] o=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _8718)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _23590)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _23590)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _25456)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (281) [user] is_delimiter(n)
^  Unify: (281) [user] is_delimiter(n)
   Call: (282) [system] char_type(n, space)
^  Redo: (281) [user] is_delimiter(n)
   Call: (282) [system] arg(_31096, v('(', ')', end_of_file), n)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _23590)
   Call: (281) [system] ')'==n
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _23590)
   Call: (281) [system] get_char((0x55aefe44e2f0), n)
   Exit: (281) [system] get_char((0x55aefe44e2f0), n)
   Call: (281) [system] n=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _23590)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _38462)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _38462)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _40328)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (282) [user] is_delimiter(' ')
^  Unify: (282) [user] is_delimiter(' ')
   Call: (283) [system] char_type(' ', space)
   Exit: (283) [system] char_type(' ', space)
^  Exit: (282) [user] is_delimiter(' ')
   Call: (282) [system] _38462=[]
   Exit: (282) [system] []=[]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (281) [system] _23590=[n]
   Exit: (281) [system] [n]=[n]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (280) [system] _8718=[o, n]
   Exit: (280) [system] [o, n]=[o, n]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, n])
   Call: (279) [system] _6054=[i, o, n]
   Exit: (279) [system] [i, o, n]=[i, o, n]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, o, n])
   Call: (278) [system] _6050=[t, i, o, n]
   Exit: (278) [system] [t, i, o, n]=[t, i, o, n]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, i, o, n])
   Call: (277) [system] _6046=[c, t, i, o, n]
   Exit: (277) [system] [c, t, i, o, n]=[c, t, i, o, n]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [c, t, i, o, n])
   Call: (276) [system] _6042=[n, c, t, i, o, n]
   Exit: (276) [system] [n, c, t, i, o, n]=[n, c, t, i, o, n]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n, c, t, i, o, n])
   Call: (275) [system] _6038=[u, n, c, t, i, o, n]
   Exit: (275) [system] [u, n, c, t, i, o, n]=[u, n, c, t, i, o, n]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [u, n, c, t, i, o, n])
^  Call: (274) [user] classify_and_convert_charseq(f, [u, n, c, t, i, o, n], _6034)
^  Unify: (274) [user] classify_and_convert_charseq(f, [u, n, c, t, i, o, n], _6034)
^  Call: (276) [system] setup_call_cleanup('$notrace'(_71052, _71054), once(user:catch(read_from_chars([f, u, n, c, t, i, o, n], _6034), _71028, fail)), '$restore_trace'(_71052, _71054))
^  Unify: (276) [system] setup_call_cleanup(system:'$notrace'(_71052, _71054), system:once(user:catch(read_from_chars([f, u, n, c, t, i, o, n], _6034), _71028, fail)), system:'$restore_trace'(_71052, _71054))
^  Call: (277) [system] sig_atomic(system:'$notrace'(_71052, _71054))
^  Exit: (276) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([f, u, n, c, t, i, o, n], function), _71028, fail)), system:'$restore_trace'(3, -1))
   Call: (275) [system] atomic(function)
   Exit: (275) [system] atomic(function)
^  Exit: (274) [user] classify_and_convert_charseq(f, [u, n, c, t, i, o, n], function)
^  Exit: (273) [user] read_symbolic(')', (0x55aefe44e2f0), f, function)
^  Exit: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), function)
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _79490)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _79490)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _83204)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (274) [system] ' '=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(' ')
^  Unify: (274) [user] is_like_space(' ')
   Call: (275) [system] char_type(' ', 'white')
   Exit: (275) [system] char_type(' ', 'white')
^  Exit: (274) [user] is_like_space(' ')
   Call: (274) [system] get_char((0x55aefe44e2f0), _91862)
   Exit: (274) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _95490)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (275) [system] '('=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', 'white')
^  Redo: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', end_of_line)
^  Redo: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', space)
^  Redo: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _113198)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (273) [system] '('=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _79490)
   Call: (273) [system] '('=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _79490)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _118776)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _118776)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _122490)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (275) [system] '('=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', 'white')
^  Redo: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', end_of_line)
^  Redo: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', space)
^  Redo: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _139274)
   Exit: (274) [system] get_char((0x55aefe44e2f0), '(')
   Call: (274) [system] '('='('
   Exit: (274) [system] '('='('
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _118776)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _118776)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _146700)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), c)
   Call: (276) [system] c=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(c)
^  Unify: (276) [user] is_like_space(c)
   Call: (277) [system] char_type(c, 'white')
^  Redo: (276) [user] is_like_space(c)
^  Unify: (276) [user] is_like_space(c)
   Call: (277) [system] char_type(c, end_of_line)
^  Redo: (276) [user] is_like_space(c)
^  Unify: (276) [user] is_like_space(c)
   Call: (277) [system] char_type(c, space)
^  Redo: (276) [user] is_like_space(c)
^  Unify: (276) [user] is_like_space(c)
   Call: (277) [system] char_type(c, cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _163484)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), c)
   Call: (275) [system] c=')'
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _118776)
   Call: (275) [system] c=end_of_file
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _118776)
^  Call: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _169062)
^  Unify: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _169062)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _172776)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), c)
   Call: (277) [system] c=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space(c)
^  Unify: (277) [user] is_like_space(c)
   Call: (278) [system] char_type(c, 'white')
^  Redo: (277) [user] is_like_space(c)
^  Unify: (277) [user] is_like_space(c)
   Call: (278) [system] char_type(c, end_of_line)
^  Redo: (277) [user] is_like_space(c)
^  Unify: (277) [user] is_like_space(c)
   Call: (278) [system] char_type(c, space)
^  Redo: (277) [user] is_like_space(c)
^  Unify: (277) [user] is_like_space(c)
   Call: (278) [system] char_type(c, cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] get_char((0x55aefe44e2f0), _189560)
   Exit: (276) [system] get_char((0x55aefe44e2f0), c)
   Call: (276) [system] c='('
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _169062)
   Call: (276) [system] c='['
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _169062)
   Call: (276) [system] c='{'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _169062)
   Call: (276) [system] c='"'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _169062)
   Call: (276) [system] c=!
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _169062)
   Call: (276) [system] c='\''
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _169062)
   Call: (276) [system] c='`'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _169062)
   Call: (276) [system] c=end_of_file
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _169062)
^  Call: (276) [user] read_symbolic(')', (0x55aefe44e2f0), c, _169062)
^  Unify: (276) [user] read_symbolic(')', (0x55aefe44e2f0), c, _169062)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _208170)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _208170)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _210036)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), h)
^  Call: (278) [user] is_delimiter(h)
^  Unify: (278) [user] is_delimiter(h)
   Call: (279) [system] char_type(h, space)
^  Redo: (278) [user] is_delimiter(h)
   Call: (279) [system] arg(_215676, v('(', ')', end_of_file), h)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _208170)
   Call: (278) [system] ')'==h
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _208170)
   Call: (278) [system] get_char((0x55aefe44e2f0), h)
   Exit: (278) [system] get_char((0x55aefe44e2f0), h)
   Call: (278) [system] h=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _208170)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _223042)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _223042)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _224908)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (279) [user] is_delimiter(a)
^  Unify: (279) [user] is_delimiter(a)
   Call: (280) [system] char_type(a, space)
^  Redo: (279) [user] is_delimiter(a)
   Call: (280) [system] arg(_230548, v('(', ')', end_of_file), a)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _223042)
   Call: (279) [system] ')'==a
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _223042)
   Call: (279) [system] get_char((0x55aefe44e2f0), a)
   Exit: (279) [system] get_char((0x55aefe44e2f0), a)
   Call: (279) [system] a=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _223042)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237914)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237914)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _239780)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (280) [user] is_delimiter(i)
^  Unify: (280) [user] is_delimiter(i)
   Call: (281) [system] char_type(i, space)
^  Redo: (280) [user] is_delimiter(i)
   Call: (281) [system] arg(_245420, v('(', ')', end_of_file), i)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237914)
   Call: (280) [system] ')'==i
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237914)
   Call: (280) [system] get_char((0x55aefe44e2f0), i)
   Exit: (280) [system] get_char((0x55aefe44e2f0), i)
   Call: (280) [system] i=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237914)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _252786)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _252786)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _254652)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (281) [user] is_delimiter(n)
^  Unify: (281) [user] is_delimiter(n)
   Call: (282) [system] char_type(n, space)
^  Redo: (281) [user] is_delimiter(n)
   Call: (282) [system] arg(_260292, v('(', ')', end_of_file), n)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _252786)
   Call: (281) [system] ')'==n
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _252786)
   Call: (281) [system] get_char((0x55aefe44e2f0), n)
   Exit: (281) [system] get_char((0x55aefe44e2f0), n)
   Call: (281) [system] n=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _252786)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _267658)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _267658)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _269524)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (282) [user] is_delimiter(' ')
^  Unify: (282) [user] is_delimiter(' ')
   Call: (283) [system] char_type(' ', space)
   Exit: (283) [system] char_type(' ', space)
^  Exit: (282) [user] is_delimiter(' ')
   Call: (282) [system] _267658=[]
   Exit: (282) [system] []=[]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (281) [system] _252786=[n]
   Exit: (281) [system] [n]=[n]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (280) [system] _237914=[i, n]
   Exit: (280) [system] [i, n]=[i, n]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, n])
   Call: (279) [system] _223042=[a, i, n]
   Exit: (279) [system] [a, i, n]=[a, i, n]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, i, n])
   Call: (278) [system] _208170=[h, a, i, n]
   Exit: (278) [system] [h, a, i, n]=[h, a, i, n]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [h, a, i, n])
^  Call: (277) [user] classify_and_convert_charseq(c, [h, a, i, n], _169062)
^  Unify: (277) [user] classify_and_convert_charseq(c, [h, a, i, n], _169062)
^  Call: (279) [system] setup_call_cleanup('$notrace'(_291866, _291868), once(user:catch(read_from_chars([c, h, a, i, n], _169062), _291842, fail)), '$restore_trace'(_291866, _291868))
^  Unify: (279) [system] setup_call_cleanup(system:'$notrace'(_291866, _291868), system:once(user:catch(read_from_chars([c, h, a, i, n], _169062), _291842, fail)), system:'$restore_trace'(_291866, _291868))
^  Call: (280) [system] sig_atomic(system:'$notrace'(_291866, _291868))
^  Exit: (279) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([c, h, a, i, n], chain), _291842, fail)), system:'$restore_trace'(3, -1))
   Call: (278) [system] atomic(chain)
   Exit: (278) [system] atomic(chain)
^  Exit: (277) [user] classify_and_convert_charseq(c, [h, a, i, n], chain)
^  Exit: (276) [user] read_symbolic(')', (0x55aefe44e2f0), c, chain)
^  Exit: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), chain)
^  Call: (275) [user] read_list(')', (0x55aefe44e2f0), _300304)
^  Unify: (275) [user] read_list(')', (0x55aefe44e2f0), _300304)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _304018)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (277) [system] ' '=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space(' ')
^  Unify: (277) [user] is_like_space(' ')
   Call: (278) [system] char_type(' ', 'white')
   Exit: (278) [system] char_type(' ', 'white')
^  Exit: (277) [user] is_like_space(' ')
   Call: (277) [system] get_char((0x55aefe44e2f0), _312676)
   Exit: (277) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _316304)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (278) [system] '('=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', 'white')
^  Redo: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', end_of_line)
^  Redo: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', space)
^  Redo: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', cntrl)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _334012)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (276) [system] '('=')'
^  Redo: (275) [user] read_list(')', (0x55aefe44e2f0), _300304)
   Call: (276) [system] '('=end_of_file
^  Redo: (275) [user] read_list(')', (0x55aefe44e2f0), _300304)
^  Call: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _339590)
^  Unify: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _339590)
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _343304)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (278) [system] '('=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', 'white')
^  Redo: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', end_of_line)
^  Redo: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', space)
^  Redo: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', cntrl)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] get_char((0x55aefe44e2f0), _360088)
   Exit: (277) [system] get_char((0x55aefe44e2f0), '(')
   Call: (277) [system] '('='('
   Exit: (277) [system] '('='('
^  Call: (277) [user] read_list(')', (0x55aefe44e2f0), _339590)
^  Unify: (277) [user] read_list(')', (0x55aefe44e2f0), _339590)
^  Call: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _367514)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), e)
   Call: (279) [system] e=(;)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (279) [user] is_like_space(e)
^  Unify: (279) [user] is_like_space(e)
   Call: (280) [system] char_type(e, 'white')
^  Redo: (279) [user] is_like_space(e)
^  Unify: (279) [user] is_like_space(e)
   Call: (280) [system] char_type(e, end_of_line)
^  Redo: (279) [user] is_like_space(e)
^  Unify: (279) [user] is_like_space(e)
   Call: (280) [system] char_type(e, space)
^  Redo: (279) [user] is_like_space(e)
^  Unify: (279) [user] is_like_space(e)
   Call: (280) [system] char_type(e, cntrl)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _384298)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), e)
   Call: (278) [system] e=')'
^  Redo: (277) [user] read_list(')', (0x55aefe44e2f0), _339590)
   Call: (278) [system] e=end_of_file
^  Redo: (277) [user] read_list(')', (0x55aefe44e2f0), _339590)
^  Call: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _389876)
^  Unify: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _389876)
^  Call: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] peek_char((0x55aefe44e2f0), _393590)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), e)
   Call: (280) [system] e=(;)
^  Redo: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (280) [user] is_like_space(e)
^  Unify: (280) [user] is_like_space(e)
   Call: (281) [system] char_type(e, 'white')
^  Redo: (280) [user] is_like_space(e)
^  Unify: (280) [user] is_like_space(e)
   Call: (281) [system] char_type(e, end_of_line)
^  Redo: (280) [user] is_like_space(e)
^  Unify: (280) [user] is_like_space(e)
   Call: (281) [system] char_type(e, space)
^  Redo: (280) [user] is_like_space(e)
^  Unify: (280) [user] is_like_space(e)
   Call: (281) [system] char_type(e, cntrl)
^  Redo: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] get_char((0x55aefe44e2f0), _410374)
   Exit: (279) [system] get_char((0x55aefe44e2f0), e)
   Call: (279) [system] e='('
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _389876)
   Call: (279) [system] e='['
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _389876)
   Call: (279) [system] e='{'
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _389876)
   Call: (279) [system] e='"'
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _389876)
   Call: (279) [system] e=!
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _389876)
   Call: (279) [system] e='\''
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _389876)
   Call: (279) [system] e='`'
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _389876)
   Call: (279) [system] e=end_of_file
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _389876)
^  Call: (279) [user] read_symbolic(')', (0x55aefe44e2f0), e, _389876)
^  Unify: (279) [user] read_symbolic(')', (0x55aefe44e2f0), e, _389876)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _428984)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _428984)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _430850)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), v)
^  Call: (281) [user] is_delimiter(v)
^  Unify: (281) [user] is_delimiter(v)
   Call: (282) [system] char_type(v, space)
^  Redo: (281) [user] is_delimiter(v)
   Call: (282) [system] arg(_436490, v('(', ')', end_of_file), v)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _428984)
   Call: (281) [system] ')'==v
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _428984)
   Call: (281) [system] get_char((0x55aefe44e2f0), v)
   Exit: (281) [system] get_char((0x55aefe44e2f0), v)
   Call: (281) [system] v=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _428984)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _443856)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _443856)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _445722)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (282) [user] is_delimiter(a)
^  Unify: (282) [user] is_delimiter(a)
   Call: (283) [system] char_type(a, space)
^  Redo: (282) [user] is_delimiter(a)
   Call: (283) [system] arg(_451362, v('(', ')', end_of_file), a)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _443856)
   Call: (282) [system] ')'==a
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _443856)
   Call: (282) [system] get_char((0x55aefe44e2f0), a)
   Exit: (282) [system] get_char((0x55aefe44e2f0), a)
   Call: (282) [system] a=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _443856)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _458728)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _458728)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _460594)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (283) [user] is_delimiter(l)
^  Unify: (283) [user] is_delimiter(l)
   Call: (284) [system] char_type(l, space)
^  Redo: (283) [user] is_delimiter(l)
   Call: (284) [system] arg(_466234, v('(', ')', end_of_file), l)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _458728)
   Call: (283) [system] ')'==l
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _458728)
   Call: (283) [system] get_char((0x55aefe44e2f0), l)
   Exit: (283) [system] get_char((0x55aefe44e2f0), l)
   Call: (283) [system] l=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _458728)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _473600)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _473600)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _475466)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (284) [user] is_delimiter(' ')
^  Unify: (284) [user] is_delimiter(' ')
   Call: (285) [system] char_type(' ', space)
   Exit: (285) [system] char_type(' ', space)
^  Exit: (284) [user] is_delimiter(' ')
   Call: (284) [system] _473600=[]
   Exit: (284) [system] []=[]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (283) [system] _458728=[l]
   Exit: (283) [system] [l]=[l]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l])
   Call: (282) [system] _443856=[a, l]
   Exit: (282) [system] [a, l]=[a, l]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, l])
   Call: (281) [system] _428984=[v, a, l]
   Exit: (281) [system] [v, a, l]=[v, a, l]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [v, a, l])
^  Call: (280) [user] classify_and_convert_charseq(e, [v, a, l], _389876)
^  Unify: (280) [user] classify_and_convert_charseq(e, [v, a, l], _389876)
^  Call: (282) [system] setup_call_cleanup('$notrace'(_495014, _495016), once(user:catch(read_from_chars([e, v, a, l], _389876), _494990, fail)), '$restore_trace'(_495014, _495016))
^  Unify: (282) [system] setup_call_cleanup(system:'$notrace'(_495014, _495016), system:once(user:catch(read_from_chars([e, v, a, l], _389876), _494990, fail)), system:'$restore_trace'(_495014, _495016))
^  Call: (283) [system] sig_atomic(system:'$notrace'(_495014, _495016))
^  Exit: (282) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([e, v, a, l], eval), _494990, fail)), system:'$restore_trace'(3, -1))
   Call: (281) [system] atomic(eval)
   Exit: (281) [system] atomic(eval)
^  Exit: (280) [user] classify_and_convert_charseq(e, [v, a, l], eval)
^  Exit: (279) [user] read_symbolic(')', (0x55aefe44e2f0), e, eval)
^  Exit: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), eval)
^  Call: (278) [user] read_list(')', (0x55aefe44e2f0), _503452)
^  Unify: (278) [user] read_list(')', (0x55aefe44e2f0), _503452)
^  Call: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] peek_char((0x55aefe44e2f0), _507166)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (280) [system] ' '=(;)
^  Redo: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (280) [user] is_like_space(' ')
^  Unify: (280) [user] is_like_space(' ')
   Call: (281) [system] char_type(' ', 'white')
   Exit: (281) [system] char_type(' ', 'white')
^  Exit: (280) [user] is_like_space(' ')
   Call: (280) [system] get_char((0x55aefe44e2f0), _515824)
   Exit: (280) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (281) [system] peek_char((0x55aefe44e2f0), _519452)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (281) [system] '('=(;)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (281) [user] is_like_space('(')
^  Unify: (281) [user] is_like_space('(')
   Call: (282) [system] char_type('(', 'white')
^  Redo: (281) [user] is_like_space('(')
^  Unify: (281) [user] is_like_space('(')
   Call: (282) [system] char_type('(', end_of_line)
^  Redo: (281) [user] is_like_space('(')
^  Unify: (281) [user] is_like_space('(')
   Call: (282) [system] char_type('(', space)
^  Redo: (281) [user] is_like_space('(')
^  Unify: (281) [user] is_like_space('(')
   Call: (282) [system] char_type('(', cntrl)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _19100)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (279) [system] '('=')'
^  Redo: (278) [user] read_list(')', (0x55aefe44e2f0), _6060)
   Call: (279) [system] '('=end_of_file
^  Redo: (278) [user] read_list(')', (0x55aefe44e2f0), _6060)
^  Call: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _24678)
^  Unify: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _24678)
^  Call: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (281) [system] peek_char((0x55aefe44e2f0), _28392)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (281) [system] '('=(;)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (281) [user] is_like_space('(')
^  Unify: (281) [user] is_like_space('(')
   Call: (282) [system] char_type('(', 'white')
^  Redo: (281) [user] is_like_space('(')
^  Unify: (281) [user] is_like_space('(')
   Call: (282) [system] char_type('(', end_of_line)
^  Redo: (281) [user] is_like_space('(')
^  Unify: (281) [user] is_like_space('(')
   Call: (282) [system] char_type('(', space)
^  Redo: (281) [user] is_like_space('(')
^  Unify: (281) [user] is_like_space('(')
   Call: (282) [system] char_type('(', cntrl)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] get_char((0x55aefe44e2f0), _45176)
   Exit: (280) [system] get_char((0x55aefe44e2f0), '(')
   Call: (280) [system] '('='('
   Exit: (280) [system] '('='('
^  Call: (280) [user] read_list(')', (0x55aefe44e2f0), _24678)
^  Unify: (280) [user] read_list(')', (0x55aefe44e2f0), _24678)
^  Call: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (281) [user] skip_spaces((0x55aefe44e2f0))
   Call: (282) [system] peek_char((0x55aefe44e2f0), _52602)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), i)
   Call: (282) [system] i=(;)
^  Redo: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (282) [user] is_like_space(i)
^  Unify: (282) [user] is_like_space(i)
   Call: (283) [system] char_type(i, 'white')
^  Redo: (282) [user] is_like_space(i)
^  Unify: (282) [user] is_like_space(i)
   Call: (283) [system] char_type(i, end_of_line)
^  Redo: (282) [user] is_like_space(i)
^  Unify: (282) [user] is_like_space(i)
   Call: (283) [system] char_type(i, space)
^  Redo: (282) [user] is_like_space(i)
^  Unify: (282) [user] is_like_space(i)
   Call: (283) [system] char_type(i, cntrl)
^  Redo: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (281) [user] skip_spaces((0x55aefe44e2f0))
   Call: (281) [system] peek_char((0x55aefe44e2f0), _69386)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), i)
   Call: (281) [system] i=')'
^  Redo: (280) [user] read_list(')', (0x55aefe44e2f0), _24678)
   Call: (281) [system] i=end_of_file
^  Redo: (280) [user] read_list(')', (0x55aefe44e2f0), _24678)
^  Call: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _74964)
^  Unify: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _74964)
^  Call: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (283) [system] peek_char((0x55aefe44e2f0), _78678)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), i)
   Call: (283) [system] i=(;)
^  Redo: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (283) [user] is_like_space(i)
^  Unify: (283) [user] is_like_space(i)
   Call: (284) [system] char_type(i, 'white')
^  Redo: (283) [user] is_like_space(i)
^  Unify: (283) [user] is_like_space(i)
   Call: (284) [system] char_type(i, end_of_line)
^  Redo: (283) [user] is_like_space(i)
^  Unify: (283) [user] is_like_space(i)
   Call: (284) [system] char_type(i, space)
^  Redo: (283) [user] is_like_space(i)
^  Unify: (283) [user] is_like_space(i)
   Call: (284) [system] char_type(i, cntrl)
^  Redo: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (282) [system] get_char((0x55aefe44e2f0), _95462)
   Exit: (282) [system] get_char((0x55aefe44e2f0), i)
   Call: (282) [system] i='('
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _74964)
   Call: (282) [system] i='['
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _74964)
   Call: (282) [system] i='{'
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _74964)
   Call: (282) [system] i='"'
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _74964)
   Call: (282) [system] i=!
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _74964)
   Call: (282) [system] i='\''
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _74964)
   Call: (282) [system] i='`'
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _74964)
   Call: (282) [system] i=end_of_file
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _74964)
^  Call: (282) [user] read_symbolic(')', (0x55aefe44e2f0), i, _74964)
^  Unify: (282) [user] read_symbolic(')', (0x55aefe44e2f0), i, _74964)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _114072)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _114072)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _115938)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), d)
^  Call: (284) [user] is_delimiter(d)
^  Unify: (284) [user] is_delimiter(d)
   Call: (285) [system] char_type(d, space)
^  Redo: (284) [user] is_delimiter(d)
   Call: (285) [system] arg(_121578, v('(', ')', end_of_file), d)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _114072)
   Call: (284) [system] ')'==d
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _114072)
   Call: (284) [system] get_char((0x55aefe44e2f0), d)
   Exit: (284) [system] get_char((0x55aefe44e2f0), d)
   Call: (284) [system] d=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _114072)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _128944)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _128944)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _130810)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (285) [user] is_delimiter(' ')
^  Unify: (285) [user] is_delimiter(' ')
   Call: (286) [system] char_type(' ', space)
   Exit: (286) [system] char_type(' ', space)
^  Exit: (285) [user] is_delimiter(' ')
   Call: (285) [system] _128944=[]
   Exit: (285) [system] []=[]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (284) [system] _114072=[d]
   Exit: (284) [system] [d]=[d]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [d])
^  Call: (283) [user] classify_and_convert_charseq(i, [d], _74964)
^  Unify: (283) [user] classify_and_convert_charseq(i, [d], _74964)
^  Call: (285) [system] setup_call_cleanup('$notrace'(_144770, _144772), once(user:catch(read_from_chars([i, d], _74964), _144746, fail)), '$restore_trace'(_144770, _144772))
^  Unify: (285) [system] setup_call_cleanup(system:'$notrace'(_144770, _144772), system:once(user:catch(read_from_chars([i, d], _74964), _144746, fail)), system:'$restore_trace'(_144770, _144772))
^  Call: (286) [system] sig_atomic(system:'$notrace'(_144770, _144772))
^  Exit: (285) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([i, d], id), _144746, fail)), system:'$restore_trace'(3, -1))
   Call: (284) [system] atomic(id)
   Exit: (284) [system] atomic(id)
^  Exit: (283) [user] classify_and_convert_charseq(i, [d], id)
^  Exit: (282) [user] read_symbolic(')', (0x55aefe44e2f0), i, id)
^  Exit: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), id)
^  Call: (281) [user] read_list(')', (0x55aefe44e2f0), _153208)
^  Unify: (281) [user] read_list(')', (0x55aefe44e2f0), _153208)
^  Call: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (283) [system] peek_char((0x55aefe44e2f0), _156922)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (283) [system] ' '=(;)
^  Redo: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (283) [user] is_like_space(' ')
^  Unify: (283) [user] is_like_space(' ')
   Call: (284) [system] char_type(' ', 'white')
   Exit: (284) [system] char_type(' ', 'white')
^  Exit: (283) [user] is_like_space(' ')
   Call: (283) [system] get_char((0x55aefe44e2f0), _165580)
   Exit: (283) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (283) [user] skip_spaces((0x55aefe44e2f0))
   Call: (284) [system] peek_char((0x55aefe44e2f0), _169208)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), $)
   Call: (284) [system] ($)=(;)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (284) [user] is_like_space($)
^  Unify: (284) [user] is_like_space($)
   Call: (285) [system] char_type($, 'white')
^  Redo: (284) [user] is_like_space($)
^  Unify: (284) [user] is_like_space($)
   Call: (285) [system] char_type($, end_of_line)
^  Redo: (284) [user] is_like_space($)
^  Unify: (284) [user] is_like_space($)
   Call: (285) [system] char_type($, space)
^  Redo: (284) [user] is_like_space($)
^  Unify: (284) [user] is_like_space($)
   Call: (285) [system] char_type($, cntrl)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (282) [system] peek_char((0x55aefe44e2f0), _186916)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), $)
   Call: (282) [system] ($)=')'
^  Redo: (281) [user] read_list(')', (0x55aefe44e2f0), _153208)
   Call: (282) [system] ($)=end_of_file
^  Redo: (281) [user] read_list(')', (0x55aefe44e2f0), _153208)
^  Call: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _192494)
^  Unify: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _192494)
^  Call: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (283) [user] skip_spaces((0x55aefe44e2f0))
   Call: (284) [system] peek_char((0x55aefe44e2f0), _196208)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), $)
   Call: (284) [system] ($)=(;)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (284) [user] is_like_space($)
^  Unify: (284) [user] is_like_space($)
   Call: (285) [system] char_type($, 'white')
^  Redo: (284) [user] is_like_space($)
^  Unify: (284) [user] is_like_space($)
   Call: (285) [system] char_type($, end_of_line)
^  Redo: (284) [user] is_like_space($)
^  Unify: (284) [user] is_like_space($)
   Call: (285) [system] char_type($, space)
^  Redo: (284) [user] is_like_space($)
^  Unify: (284) [user] is_like_space($)
   Call: (285) [system] char_type($, cntrl)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (283) [user] skip_spaces((0x55aefe44e2f0))
   Call: (283) [system] get_char((0x55aefe44e2f0), _212992)
   Exit: (283) [system] get_char((0x55aefe44e2f0), $)
   Call: (283) [system] ($)='('
^  Redo: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _192494)
   Call: (283) [system] ($)='['
^  Redo: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _192494)
   Call: (283) [system] ($)='{'
^  Redo: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _192494)
   Call: (283) [system] ($)='"'
^  Redo: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _192494)
   Call: (283) [system] ($)=!
^  Redo: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _192494)
   Call: (283) [system] ($)='\''
^  Redo: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _192494)
   Call: (283) [system] ($)='`'
^  Redo: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _192494)
   Call: (283) [system] ($)=end_of_file
^  Redo: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _192494)
^  Call: (283) [user] read_symbolic(')', (0x55aefe44e2f0), $, _192494)
^  Unify: (283) [user] read_symbolic(')', (0x55aefe44e2f0), $, _192494)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _231602)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _231602)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _233468)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (285) [user] is_delimiter(a)
^  Unify: (285) [user] is_delimiter(a)
   Call: (286) [system] char_type(a, space)
^  Redo: (285) [user] is_delimiter(a)
   Call: (286) [system] arg(_239108, v('(', ')', end_of_file), a)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _231602)
   Call: (285) [system] ')'==a
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _231602)
   Call: (285) [system] get_char((0x55aefe44e2f0), a)
   Exit: (285) [system] get_char((0x55aefe44e2f0), a)
   Call: (285) [system] a=(\)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _231602)
^  Call: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _246474)
^  Unify: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _246474)
   Call: (286) [system] peek_char((0x55aefe44e2f0), _248340)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (286) [user] is_delimiter(t)
^  Unify: (286) [user] is_delimiter(t)
   Call: (287) [system] char_type(t, space)
^  Redo: (286) [user] is_delimiter(t)
   Call: (287) [system] arg(_253980, v('(', ')', end_of_file), t)
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _246474)
   Call: (286) [system] ')'==t
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _246474)
   Call: (286) [system] get_char((0x55aefe44e2f0), t)
   Exit: (286) [system] get_char((0x55aefe44e2f0), t)
   Call: (286) [system] t=(\)
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _246474)
^  Call: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _261346)
^  Unify: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _261346)
   Call: (287) [system] peek_char((0x55aefe44e2f0), _263212)
   Exit: (287) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (287) [user] is_delimiter(o)
^  Unify: (287) [user] is_delimiter(o)
   Call: (288) [system] char_type(o, space)
^  Redo: (287) [user] is_delimiter(o)
   Call: (288) [system] arg(_268852, v('(', ')', end_of_file), o)
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _261346)
   Call: (287) [system] ')'==o
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _261346)
   Call: (287) [system] get_char((0x55aefe44e2f0), o)
   Exit: (287) [system] get_char((0x55aefe44e2f0), o)
   Call: (287) [system] o=(\)
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _261346)
^  Call: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _276218)
^  Unify: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _276218)
   Call: (288) [system] peek_char((0x55aefe44e2f0), _278084)
   Exit: (288) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (288) [user] is_delimiter(m)
^  Unify: (288) [user] is_delimiter(m)
   Call: (289) [system] char_type(m, space)
^  Redo: (288) [user] is_delimiter(m)
   Call: (289) [system] arg(_283724, v('(', ')', end_of_file), m)
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _276218)
   Call: (288) [system] ')'==m
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _276218)
   Call: (288) [system] get_char((0x55aefe44e2f0), m)
   Exit: (288) [system] get_char((0x55aefe44e2f0), m)
   Call: (288) [system] m=(\)
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _276218)
^  Call: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _291090)
^  Unify: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _291090)
   Call: (289) [system] peek_char((0x55aefe44e2f0), _292956)
   Exit: (289) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (289) [user] is_delimiter(')')
^  Unify: (289) [user] is_delimiter(')')
   Call: (290) [system] char_type(')', space)
^  Redo: (289) [user] is_delimiter(')')
   Call: (290) [system] arg(_298596, v('(', ')', end_of_file), ')')
   Exit: (290) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (289) [user] is_delimiter(')')
   Call: (289) [system] _291090=[]
   Exit: (289) [system] []=[]
^  Exit: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (288) [system] _276218=[m]
   Exit: (288) [system] [m]=[m]
^  Exit: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (287) [system] _261346=[o, m]
   Exit: (287) [system] [o, m]=[o, m]
^  Exit: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (286) [system] _246474=[t, o, m]
   Exit: (286) [system] [t, o, m]=[t, o, m]
^  Exit: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
   Call: (285) [system] _231602=[a, t, o, m]
   Exit: (285) [system] [a, t, o, m]=[a, t, o, m]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, t, o, m])
^  Call: (284) [user] classify_and_convert_charseq($, [a, t, o, m], _192494)
^  Unify: (284) [user] classify_and_convert_charseq($, [a, t, o, m], '$VAR'(_316208))
   Call: (285) [system] atom_chars(_316208, ['_', a, t, o, m])
   Exit: (285) [system] atom_chars('_atom', ['_', a, t, o, m])
^  Exit: (284) [user] classify_and_convert_charseq($, [a, t, o, m], _atom)
^  Exit: (283) [user] read_symbolic(')', (0x55aefe44e2f0), $, _atom)
^  Exit: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _atom)
^  Call: (282) [user] read_list(')', (0x55aefe44e2f0), _321804)
^  Unify: (282) [user] read_list(')', (0x55aefe44e2f0), _321804)
^  Call: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (283) [user] skip_spaces((0x55aefe44e2f0))
   Call: (284) [system] peek_char((0x55aefe44e2f0), _325518)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (284) [system] ')'=(;)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (284) [user] is_like_space(')')
^  Unify: (284) [user] is_like_space(')')
   Call: (285) [system] char_type(')', 'white')
^  Redo: (284) [user] is_like_space(')')
^  Unify: (284) [user] is_like_space(')')
   Call: (285) [system] char_type(')', end_of_line)
^  Redo: (284) [user] is_like_space(')')
^  Unify: (284) [user] is_like_space(')')
   Call: (285) [system] char_type(')', space)
^  Redo: (284) [user] is_like_space(')')
^  Unify: (284) [user] is_like_space(')')
   Call: (285) [system] char_type(')', cntrl)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (283) [user] skip_spaces((0x55aefe44e2f0))
   Call: (283) [system] peek_char((0x55aefe44e2f0), _342302)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (283) [system] ')'=')'
   Exit: (283) [system] ')'=')'
   Call: (283) [system] get_char((0x55aefe44e2f0), _346092)
   Exit: (283) [system] get_char((0x55aefe44e2f0), ')')
   Call: (283) [system] _321804=[]
   Exit: (283) [system] []=[]
^  Exit: (282) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (282) [system] _153208=[_atom]
   Exit: (282) [system] [_atom]=[_atom]
^  Exit: (281) [user] read_list(')', (0x55aefe44e2f0), [_atom])
   Call: (281) [system] _24678=[id, _atom]
   Exit: (281) [system] [id, _atom]=[id, _atom]
^  Exit: (280) [user] read_list(')', (0x55aefe44e2f0), [id, _atom])
^  Exit: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), [id, _atom])
^  Call: (279) [user] read_list(')', (0x55aefe44e2f0), _357180)
^  Unify: (279) [user] read_list(')', (0x55aefe44e2f0), _357180)
^  Call: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (281) [system] peek_char((0x55aefe44e2f0), _360894)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (281) [system] ')'=(;)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (281) [user] is_like_space(')')
^  Unify: (281) [user] is_like_space(')')
   Call: (282) [system] char_type(')', 'white')
^  Redo: (281) [user] is_like_space(')')
^  Unify: (281) [user] is_like_space(')')
   Call: (282) [system] char_type(')', end_of_line)
^  Redo: (281) [user] is_like_space(')')
^  Unify: (281) [user] is_like_space(')')
   Call: (282) [system] char_type(')', space)
^  Redo: (281) [user] is_like_space(')')
^  Unify: (281) [user] is_like_space(')')
   Call: (282) [system] char_type(')', cntrl)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] peek_char((0x55aefe44e2f0), _377678)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (280) [system] ')'=')'
   Exit: (280) [system] ')'=')'
   Call: (280) [system] get_char((0x55aefe44e2f0), _381468)
   Exit: (280) [system] get_char((0x55aefe44e2f0), ')')
   Call: (280) [system] _357180=[]
   Exit: (280) [system] []=[]
^  Exit: (279) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (279) [system] _6060=[[id, _atom]]
   Exit: (279) [system] [[id, _atom]]=[[id, _atom]]
^  Exit: (278) [user] read_list(')', (0x55aefe44e2f0), [[id, _atom]])
   Call: (278) [system] _6052=[eval, [id, _atom]]
   Exit: (278) [system] [eval, [id, _atom]]=[eval, [id, _atom]]
^  Exit: (277) [user] read_list(')', (0x55aefe44e2f0), [eval, [id, _atom]])
^  Exit: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), [eval, [id, _atom]])
^  Call: (276) [user] read_list(')', (0x55aefe44e2f0), _392556)
^  Unify: (276) [user] read_list(')', (0x55aefe44e2f0), _392556)
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _396270)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (278) [system] ' '=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space(' ')
^  Unify: (278) [user] is_like_space(' ')
   Call: (279) [system] char_type(' ', 'white')
   Exit: (279) [system] char_type(' ', 'white')
^  Exit: (278) [user] is_like_space(' ')
   Call: (278) [system] get_char((0x55aefe44e2f0), _404928)
   Exit: (278) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _408556)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), $)
   Call: (279) [system] ($)=(;)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (279) [user] is_like_space($)
^  Unify: (279) [user] is_like_space($)
   Call: (280) [system] char_type($, 'white')
^  Redo: (279) [user] is_like_space($)
^  Unify: (279) [user] is_like_space($)
   Call: (280) [system] char_type($, end_of_line)
^  Redo: (279) [user] is_like_space($)
^  Unify: (279) [user] is_like_space($)
   Call: (280) [system] char_type($, space)
^  Redo: (279) [user] is_like_space($)
^  Unify: (279) [user] is_like_space($)
   Call: (280) [system] char_type($, cntrl)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _426264)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), $)
   Call: (277) [system] ($)=')'
^  Redo: (276) [user] read_list(')', (0x55aefe44e2f0), _392556)
   Call: (277) [system] ($)=end_of_file
^  Redo: (276) [user] read_list(')', (0x55aefe44e2f0), _392556)
^  Call: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _431842)
^  Unify: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _431842)
^  Call: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _435556)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), $)
   Call: (279) [system] ($)=(;)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (279) [user] is_like_space($)
^  Unify: (279) [user] is_like_space($)
   Call: (280) [system] char_type($, 'white')
^  Redo: (279) [user] is_like_space($)
^  Unify: (279) [user] is_like_space($)
   Call: (280) [system] char_type($, end_of_line)
^  Redo: (279) [user] is_like_space($)
^  Unify: (279) [user] is_like_space($)
   Call: (280) [system] char_type($, space)
^  Redo: (279) [user] is_like_space($)
^  Unify: (279) [user] is_like_space($)
   Call: (280) [system] char_type($, cntrl)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] get_char((0x55aefe44e2f0), _452340)
   Exit: (278) [system] get_char((0x55aefe44e2f0), $)
   Call: (278) [system] ($)='('
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _431842)
   Call: (278) [system] ($)='['
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _431842)
   Call: (278) [system] ($)='{'
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _431842)
   Call: (278) [system] ($)='"'
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _431842)
   Call: (278) [system] ($)=!
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _431842)
   Call: (278) [system] ($)='\''
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _431842)
   Call: (278) [system] ($)='`'
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _431842)
   Call: (278) [system] ($)=end_of_file
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _431842)
^  Call: (278) [user] read_symbolic(')', (0x55aefe44e2f0), $, _431842)
^  Unify: (278) [user] read_symbolic(')', (0x55aefe44e2f0), $, _431842)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _470950)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _470950)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _472816)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), v)
^  Call: (280) [user] is_delimiter(v)
^  Unify: (280) [user] is_delimiter(v)
   Call: (281) [system] char_type(v, space)
^  Redo: (280) [user] is_delimiter(v)
   Call: (281) [system] arg(_478456, v('(', ')', end_of_file), v)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _470950)
   Call: (280) [system] ')'==v
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _470950)
   Call: (280) [system] get_char((0x55aefe44e2f0), v)
   Exit: (280) [system] get_char((0x55aefe44e2f0), v)
   Call: (280) [system] v=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _470950)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _485822)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _485822)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _487688)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (281) [user] is_delimiter(a)
^  Unify: (281) [user] is_delimiter(a)
   Call: (282) [system] char_type(a, space)
^  Redo: (281) [user] is_delimiter(a)
   Call: (282) [system] arg(_493328, v('(', ')', end_of_file), a)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _485822)
   Call: (281) [system] ')'==a
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _485822)
   Call: (281) [system] get_char((0x55aefe44e2f0), a)
   Exit: (281) [system] get_char((0x55aefe44e2f0), a)
   Call: (281) [system] a=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _485822)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _500694)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _500694)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _502560)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (282) [user] is_delimiter(r)
^  Unify: (282) [user] is_delimiter(r)
   Call: (283) [system] char_type(r, space)
^  Redo: (282) [user] is_delimiter(r)
   Call: (283) [system] arg(_508200, v('(', ')', end_of_file), r)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _500694)
   Call: (282) [system] ')'==r
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _500694)
   Call: (282) [system] get_char((0x55aefe44e2f0), r)
   Exit: (282) [system] get_char((0x55aefe44e2f0), r)
   Call: (282) [system] r=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _500694)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _515566)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _515566)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _517432)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (283) [user] is_delimiter(' ')
^  Unify: (283) [user] is_delimiter(' ')
   Call: (284) [system] char_type(' ', space)
   Exit: (284) [system] char_type(' ', space)
^  Exit: (283) [user] is_delimiter(' ')
   Call: (283) [system] _6102=[]
   Exit: (283) [system] []=[]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (282) [system] _6098=[r]
   Exit: (282) [system] [r]=[r]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r])
   Call: (281) [system] _6094=[a, r]
   Exit: (281) [system] [a, r]=[a, r]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, r])
   Call: (280) [system] _6090=[v, a, r]
   Exit: (280) [system] [v, a, r]=[v, a, r]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [v, a, r])
^  Call: (279) [user] classify_and_convert_charseq($, [v, a, r], _6086)
^  Unify: (279) [user] classify_and_convert_charseq($, [v, a, r], '$VAR'(_18150))
   Call: (280) [system] atom_chars(_18150, ['_', v, a, r])
   Exit: (280) [system] atom_chars('_var', ['_', v, a, r])
^  Exit: (279) [user] classify_and_convert_charseq($, [v, a, r], _var)
^  Exit: (278) [user] read_symbolic(')', (0x55aefe44e2f0), $, _var)
^  Exit: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _var)
^  Call: (277) [user] read_list(')', (0x55aefe44e2f0), _23746)
^  Unify: (277) [user] read_list(')', (0x55aefe44e2f0), _23746)
^  Call: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _27460)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (279) [system] ' '=(;)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (279) [user] is_like_space(' ')
^  Unify: (279) [user] is_like_space(' ')
   Call: (280) [system] char_type(' ', 'white')
   Exit: (280) [system] char_type(' ', 'white')
^  Exit: (279) [user] is_like_space(' ')
   Call: (279) [system] get_char((0x55aefe44e2f0), _36118)
   Exit: (279) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] peek_char((0x55aefe44e2f0), _39746)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (280) [system] '('=(;)
^  Redo: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (280) [user] is_like_space('(')
^  Unify: (280) [user] is_like_space('(')
   Call: (281) [system] char_type('(', 'white')
^  Redo: (280) [user] is_like_space('(')
^  Unify: (280) [user] is_like_space('(')
   Call: (281) [system] char_type('(', end_of_line)
^  Redo: (280) [user] is_like_space('(')
^  Unify: (280) [user] is_like_space('(')
   Call: (281) [system] char_type('(', space)
^  Redo: (280) [user] is_like_space('(')
^  Unify: (280) [user] is_like_space('(')
   Call: (281) [system] char_type('(', cntrl)
^  Redo: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _57454)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (278) [system] '('=')'
^  Redo: (277) [user] read_list(')', (0x55aefe44e2f0), _23746)
   Call: (278) [system] '('=end_of_file
^  Redo: (277) [user] read_list(')', (0x55aefe44e2f0), _23746)
^  Call: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _63032)
^  Unify: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _63032)
^  Call: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] peek_char((0x55aefe44e2f0), _66746)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (280) [system] '('=(;)
^  Redo: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (280) [user] is_like_space('(')
^  Unify: (280) [user] is_like_space('(')
   Call: (281) [system] char_type('(', 'white')
^  Redo: (280) [user] is_like_space('(')
^  Unify: (280) [user] is_like_space('(')
   Call: (281) [system] char_type('(', end_of_line)
^  Redo: (280) [user] is_like_space('(')
^  Unify: (280) [user] is_like_space('(')
   Call: (281) [system] char_type('(', space)
^  Redo: (280) [user] is_like_space('(')
^  Unify: (280) [user] is_like_space('(')
   Call: (281) [system] char_type('(', cntrl)
^  Redo: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] get_char((0x55aefe44e2f0), _83530)
   Exit: (279) [system] get_char((0x55aefe44e2f0), '(')
   Call: (279) [system] '('='('
   Exit: (279) [system] '('='('
^  Call: (279) [user] read_list(')', (0x55aefe44e2f0), _63032)
^  Unify: (279) [user] read_list(')', (0x55aefe44e2f0), _63032)
^  Call: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (281) [system] peek_char((0x55aefe44e2f0), _90956)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), r)
   Call: (281) [system] r=(;)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (281) [user] is_like_space(r)
^  Unify: (281) [user] is_like_space(r)
   Call: (282) [system] char_type(r, 'white')
^  Redo: (281) [user] is_like_space(r)
^  Unify: (281) [user] is_like_space(r)
   Call: (282) [system] char_type(r, end_of_line)
^  Redo: (281) [user] is_like_space(r)
^  Unify: (281) [user] is_like_space(r)
   Call: (282) [system] char_type(r, space)
^  Redo: (281) [user] is_like_space(r)
^  Unify: (281) [user] is_like_space(r)
   Call: (282) [system] char_type(r, cntrl)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] peek_char((0x55aefe44e2f0), _107740)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), r)
   Call: (280) [system] r=')'
^  Redo: (279) [user] read_list(')', (0x55aefe44e2f0), _63032)
   Call: (280) [system] r=end_of_file
^  Redo: (279) [user] read_list(')', (0x55aefe44e2f0), _63032)
^  Call: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), _113318)
^  Unify: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), _113318)
^  Call: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (281) [user] skip_spaces((0x55aefe44e2f0))
   Call: (282) [system] peek_char((0x55aefe44e2f0), _117032)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), r)
   Call: (282) [system] r=(;)
^  Redo: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (282) [user] is_like_space(r)
^  Unify: (282) [user] is_like_space(r)
   Call: (283) [system] char_type(r, 'white')
^  Redo: (282) [user] is_like_space(r)
^  Unify: (282) [user] is_like_space(r)
   Call: (283) [system] char_type(r, end_of_line)
^  Redo: (282) [user] is_like_space(r)
^  Unify: (282) [user] is_like_space(r)
   Call: (283) [system] char_type(r, space)
^  Redo: (282) [user] is_like_space(r)
^  Unify: (282) [user] is_like_space(r)
   Call: (283) [system] char_type(r, cntrl)
^  Redo: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (281) [user] skip_spaces((0x55aefe44e2f0))
   Call: (281) [system] get_char((0x55aefe44e2f0), _133816)
   Exit: (281) [system] get_char((0x55aefe44e2f0), r)
   Call: (281) [system] r='('
^  Redo: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), _113318)
   Call: (281) [system] r='['
^  Redo: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), _113318)
   Call: (281) [system] r='{'
^  Redo: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), _113318)
   Call: (281) [system] r='"'
^  Redo: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), _113318)
   Call: (281) [system] r=!
^  Redo: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), _113318)
   Call: (281) [system] r='\''
^  Redo: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), _113318)
   Call: (281) [system] r='`'
^  Redo: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), _113318)
   Call: (281) [system] r=end_of_file
^  Redo: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), _113318)
^  Call: (281) [user] read_symbolic(')', (0x55aefe44e2f0), r, _113318)
^  Unify: (281) [user] read_symbolic(')', (0x55aefe44e2f0), r, _113318)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152426)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152426)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _154292)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (283) [user] is_delimiter(e)
^  Unify: (283) [user] is_delimiter(e)
   Call: (284) [system] char_type(e, space)
^  Redo: (283) [user] is_delimiter(e)
   Call: (284) [system] arg(_159932, v('(', ')', end_of_file), e)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152426)
   Call: (283) [system] ')'==e
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152426)
   Call: (283) [system] get_char((0x55aefe44e2f0), e)
   Exit: (283) [system] get_char((0x55aefe44e2f0), e)
   Call: (283) [system] e=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152426)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _167298)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _167298)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _169164)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (284) [user] is_delimiter(t)
^  Unify: (284) [user] is_delimiter(t)
   Call: (285) [system] char_type(t, space)
^  Redo: (284) [user] is_delimiter(t)
   Call: (285) [system] arg(_174804, v('(', ')', end_of_file), t)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _167298)
   Call: (284) [system] ')'==t
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _167298)
   Call: (284) [system] get_char((0x55aefe44e2f0), t)
   Exit: (284) [system] get_char((0x55aefe44e2f0), t)
   Call: (284) [system] t=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _167298)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _182170)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _182170)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _184036)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), u)
^  Call: (285) [user] is_delimiter(u)
^  Unify: (285) [user] is_delimiter(u)
   Call: (286) [system] char_type(u, space)
^  Redo: (285) [user] is_delimiter(u)
   Call: (286) [system] arg(_189676, v('(', ')', end_of_file), u)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _182170)
   Call: (285) [system] ')'==u
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _182170)
   Call: (285) [system] get_char((0x55aefe44e2f0), u)
   Exit: (285) [system] get_char((0x55aefe44e2f0), u)
   Call: (285) [system] u=(\)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _182170)
^  Call: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _197042)
^  Unify: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _197042)
   Call: (286) [system] peek_char((0x55aefe44e2f0), _198908)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (286) [user] is_delimiter(r)
^  Unify: (286) [user] is_delimiter(r)
   Call: (287) [system] char_type(r, space)
^  Redo: (286) [user] is_delimiter(r)
   Call: (287) [system] arg(_204548, v('(', ')', end_of_file), r)
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _197042)
   Call: (286) [system] ')'==r
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _197042)
   Call: (286) [system] get_char((0x55aefe44e2f0), r)
   Exit: (286) [system] get_char((0x55aefe44e2f0), r)
   Call: (286) [system] r=(\)
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _197042)
^  Call: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _211914)
^  Unify: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _211914)
   Call: (287) [system] peek_char((0x55aefe44e2f0), _213780)
   Exit: (287) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (287) [user] is_delimiter(n)
^  Unify: (287) [user] is_delimiter(n)
   Call: (288) [system] char_type(n, space)
^  Redo: (287) [user] is_delimiter(n)
   Call: (288) [system] arg(_219420, v('(', ')', end_of_file), n)
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _211914)
   Call: (287) [system] ')'==n
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _211914)
   Call: (287) [system] get_char((0x55aefe44e2f0), n)
   Exit: (287) [system] get_char((0x55aefe44e2f0), n)
   Call: (287) [system] n=(\)
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _211914)
^  Call: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _226786)
^  Unify: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _226786)
   Call: (288) [system] peek_char((0x55aefe44e2f0), _228652)
   Exit: (288) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (288) [user] is_delimiter(' ')
^  Unify: (288) [user] is_delimiter(' ')
   Call: (289) [system] char_type(' ', space)
   Exit: (289) [system] char_type(' ', space)
^  Exit: (288) [user] is_delimiter(' ')
   Call: (288) [system] _226786=[]
   Exit: (288) [system] []=[]
^  Exit: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (287) [system] _211914=[n]
   Exit: (287) [system] [n]=[n]
^  Exit: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (286) [system] _197042=[r, n]
   Exit: (286) [system] [r, n]=[r, n]
^  Exit: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, n])
   Call: (285) [system] _182170=[u, r, n]
   Exit: (285) [system] [u, r, n]=[u, r, n]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [u, r, n])
   Call: (284) [system] _167298=[t, u, r, n]
   Exit: (284) [system] [t, u, r, n]=[t, u, r, n]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, u, r, n])
   Call: (283) [system] _152426=[e, t, u, r, n]
   Exit: (283) [system] [e, t, u, r, n]=[e, t, u, r, n]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, t, u, r, n])
^  Call: (282) [user] classify_and_convert_charseq(r, [e, t, u, r, n], _113318)
^  Unify: (282) [user] classify_and_convert_charseq(r, [e, t, u, r, n], _113318)
^  Call: (284) [system] setup_call_cleanup('$notrace'(_253788, _253790), once(user:catch(read_from_chars([r, e, t, u, r, n], _113318), _253764, fail)), '$restore_trace'(_253788, _253790))
^  Unify: (284) [system] setup_call_cleanup(system:'$notrace'(_253788, _253790), system:once(user:catch(read_from_chars([r, e, t, u, r, n], _113318), _253764, fail)), system:'$restore_trace'(_253788, _253790))
^  Call: (285) [system] sig_atomic(system:'$notrace'(_253788, _253790))
^  Exit: (284) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([r, e, t, u, r, n], return), _253764, fail)), system:'$restore_trace'(3, -1))
   Call: (283) [system] atomic(return)
   Exit: (283) [system] atomic(return)
^  Exit: (282) [user] classify_and_convert_charseq(r, [e, t, u, r, n], return)
^  Exit: (281) [user] read_symbolic(')', (0x55aefe44e2f0), r, return)
^  Exit: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), return)
^  Call: (280) [user] read_list(')', (0x55aefe44e2f0), _262226)
^  Unify: (280) [user] read_list(')', (0x55aefe44e2f0), _262226)
^  Call: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (281) [user] skip_spaces((0x55aefe44e2f0))
   Call: (282) [system] peek_char((0x55aefe44e2f0), _265940)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (282) [system] ' '=(;)
^  Redo: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (282) [user] is_like_space(' ')
^  Unify: (282) [user] is_like_space(' ')
   Call: (283) [system] char_type(' ', 'white')
   Exit: (283) [system] char_type(' ', 'white')
^  Exit: (282) [user] is_like_space(' ')
   Call: (282) [system] get_char((0x55aefe44e2f0), _274598)
   Exit: (282) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (283) [system] peek_char((0x55aefe44e2f0), _278226)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), $)
   Call: (283) [system] ($)=(;)
^  Redo: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (283) [user] is_like_space($)
^  Unify: (283) [user] is_like_space($)
   Call: (284) [system] char_type($, 'white')
^  Redo: (283) [user] is_like_space($)
^  Unify: (283) [user] is_like_space($)
   Call: (284) [system] char_type($, end_of_line)
^  Redo: (283) [user] is_like_space($)
^  Unify: (283) [user] is_like_space($)
   Call: (284) [system] char_type($, space)
^  Redo: (283) [user] is_like_space($)
^  Unify: (283) [user] is_like_space($)
   Call: (284) [system] char_type($, cntrl)
^  Redo: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (281) [user] skip_spaces((0x55aefe44e2f0))
   Call: (281) [system] peek_char((0x55aefe44e2f0), _295934)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), $)
   Call: (281) [system] ($)=')'
^  Redo: (280) [user] read_list(')', (0x55aefe44e2f0), _262226)
   Call: (281) [system] ($)=end_of_file
^  Redo: (280) [user] read_list(')', (0x55aefe44e2f0), _262226)
^  Call: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _301512)
^  Unify: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _301512)
^  Call: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (283) [system] peek_char((0x55aefe44e2f0), _305226)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), $)
   Call: (283) [system] ($)=(;)
^  Redo: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (283) [user] is_like_space($)
^  Unify: (283) [user] is_like_space($)
   Call: (284) [system] char_type($, 'white')
^  Redo: (283) [user] is_like_space($)
^  Unify: (283) [user] is_like_space($)
   Call: (284) [system] char_type($, end_of_line)
^  Redo: (283) [user] is_like_space($)
^  Unify: (283) [user] is_like_space($)
   Call: (284) [system] char_type($, space)
^  Redo: (283) [user] is_like_space($)
^  Unify: (283) [user] is_like_space($)
   Call: (284) [system] char_type($, cntrl)
^  Redo: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (282) [system] get_char((0x55aefe44e2f0), _322010)
   Exit: (282) [system] get_char((0x55aefe44e2f0), $)
   Call: (282) [system] ($)='('
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _301512)
   Call: (282) [system] ($)='['
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _301512)
   Call: (282) [system] ($)='{'
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _301512)
   Call: (282) [system] ($)='"'
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _301512)
   Call: (282) [system] ($)=!
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _301512)
   Call: (282) [system] ($)='\''
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _301512)
   Call: (282) [system] ($)='`'
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _301512)
   Call: (282) [system] ($)=end_of_file
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _301512)
^  Call: (282) [user] read_symbolic(')', (0x55aefe44e2f0), $, _301512)
^  Unify: (282) [user] read_symbolic(')', (0x55aefe44e2f0), $, _301512)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _340620)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _340620)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _342486)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (284) [user] is_delimiter(t)
^  Unify: (284) [user] is_delimiter(t)
   Call: (285) [system] char_type(t, space)
^  Redo: (284) [user] is_delimiter(t)
   Call: (285) [system] arg(_348126, v('(', ')', end_of_file), t)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _340620)
   Call: (284) [system] ')'==t
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _340620)
   Call: (284) [system] get_char((0x55aefe44e2f0), t)
   Exit: (284) [system] get_char((0x55aefe44e2f0), t)
   Call: (284) [system] t=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _340620)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _355492)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _355492)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _357358)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (285) [user] is_delimiter(e)
^  Unify: (285) [user] is_delimiter(e)
   Call: (286) [system] char_type(e, space)
^  Redo: (285) [user] is_delimiter(e)
   Call: (286) [system] arg(_362998, v('(', ')', end_of_file), e)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _355492)
   Call: (285) [system] ')'==e
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _355492)
   Call: (285) [system] get_char((0x55aefe44e2f0), e)
   Exit: (285) [system] get_char((0x55aefe44e2f0), e)
   Call: (285) [system] e=(\)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _355492)
^  Call: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _370364)
^  Unify: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _370364)
   Call: (286) [system] peek_char((0x55aefe44e2f0), _372230)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (286) [user] is_delimiter(m)
^  Unify: (286) [user] is_delimiter(m)
   Call: (287) [system] char_type(m, space)
^  Redo: (286) [user] is_delimiter(m)
   Call: (287) [system] arg(_377870, v('(', ')', end_of_file), m)
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _370364)
   Call: (286) [system] ')'==m
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _370364)
   Call: (286) [system] get_char((0x55aefe44e2f0), m)
   Exit: (286) [system] get_char((0x55aefe44e2f0), m)
   Call: (286) [system] m=(\)
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _370364)
^  Call: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _385236)
^  Unify: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _385236)
   Call: (287) [system] peek_char((0x55aefe44e2f0), _387102)
   Exit: (287) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (287) [user] is_delimiter(p)
^  Unify: (287) [user] is_delimiter(p)
   Call: (288) [system] char_type(p, space)
^  Redo: (287) [user] is_delimiter(p)
   Call: (288) [system] arg(_392742, v('(', ')', end_of_file), p)
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _385236)
   Call: (287) [system] ')'==p
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _385236)
   Call: (287) [system] get_char((0x55aefe44e2f0), p)
   Exit: (287) [system] get_char((0x55aefe44e2f0), p)
   Call: (287) [system] p=(\)
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _385236)
^  Call: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _400108)
^  Unify: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _400108)
   Call: (288) [system] peek_char((0x55aefe44e2f0), _401974)
   Exit: (288) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (288) [user] is_delimiter(l)
^  Unify: (288) [user] is_delimiter(l)
   Call: (289) [system] char_type(l, space)
^  Redo: (288) [user] is_delimiter(l)
   Call: (289) [system] arg(_407614, v('(', ')', end_of_file), l)
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _400108)
   Call: (288) [system] ')'==l
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _400108)
   Call: (288) [system] get_char((0x55aefe44e2f0), l)
   Exit: (288) [system] get_char((0x55aefe44e2f0), l)
   Call: (288) [system] l=(\)
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _400108)
^  Call: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _414980)
^  Unify: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _414980)
   Call: (289) [system] peek_char((0x55aefe44e2f0), _416846)
   Exit: (289) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (289) [user] is_delimiter(')')
^  Unify: (289) [user] is_delimiter(')')
   Call: (290) [system] char_type(')', space)
^  Redo: (289) [user] is_delimiter(')')
   Call: (290) [system] arg(_422486, v('(', ')', end_of_file), ')')
   Exit: (290) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (289) [user] is_delimiter(')')
   Call: (289) [system] _414980=[]
   Exit: (289) [system] []=[]
^  Exit: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (288) [system] _400108=[l]
   Exit: (288) [system] [l]=[l]
^  Exit: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l])
   Call: (287) [system] _385236=[p, l]
   Exit: (287) [system] [p, l]=[p, l]
^  Exit: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, l])
   Call: (286) [system] _370364=[m, p, l]
   Exit: (286) [system] [m, p, l]=[m, p, l]
^  Exit: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m, p, l])
   Call: (285) [system] _355492=[e, m, p, l]
   Exit: (285) [system] [e, m, p, l]=[e, m, p, l]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, m, p, l])
   Call: (284) [system] _340620=[t, e, m, p, l]
   Exit: (284) [system] [t, e, m, p, l]=[t, e, m, p, l]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, e, m, p, l])
^  Call: (283) [user] classify_and_convert_charseq($, [t, e, m, p, l], _301512)
^  Unify: (283) [user] classify_and_convert_charseq($, [t, e, m, p, l], '$VAR'(_442892))
   Call: (284) [system] atom_chars(_442892, ['_', t, e, m, p, l])
   Exit: (284) [system] atom_chars('_templ', ['_', t, e, m, p, l])
^  Exit: (283) [user] classify_and_convert_charseq($, [t, e, m, p, l], _templ)
^  Exit: (282) [user] read_symbolic(')', (0x55aefe44e2f0), $, _templ)
^  Exit: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _templ)
^  Call: (281) [user] read_list(')', (0x55aefe44e2f0), _448488)
^  Unify: (281) [user] read_list(')', (0x55aefe44e2f0), _448488)
^  Call: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (283) [system] peek_char((0x55aefe44e2f0), _452202)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (283) [system] ')'=(;)
^  Redo: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (283) [user] is_like_space(')')
^  Unify: (283) [user] is_like_space(')')
   Call: (284) [system] char_type(')', 'white')
^  Redo: (283) [user] is_like_space(')')
^  Unify: (283) [user] is_like_space(')')
   Call: (284) [system] char_type(')', end_of_line)
^  Redo: (283) [user] is_like_space(')')
^  Unify: (283) [user] is_like_space(')')
   Call: (284) [system] char_type(')', space)
^  Redo: (283) [user] is_like_space(')')
^  Unify: (283) [user] is_like_space(')')
   Call: (284) [system] char_type(')', cntrl)
^  Redo: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (282) [system] peek_char((0x55aefe44e2f0), _468986)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (282) [system] ')'=')'
   Exit: (282) [system] ')'=')'
   Call: (282) [system] get_char((0x55aefe44e2f0), _472776)
   Exit: (282) [system] get_char((0x55aefe44e2f0), ')')
   Call: (282) [system] _448488=[]
   Exit: (282) [system] []=[]
^  Exit: (281) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (281) [system] _262226=[_templ]
   Exit: (281) [system] [_templ]=[_templ]
^  Exit: (280) [user] read_list(')', (0x55aefe44e2f0), [_templ])
   Call: (280) [system] _63032=[return, _templ]
   Exit: (280) [system] [return, _templ]=[return, _templ]
^  Exit: (279) [user] read_list(')', (0x55aefe44e2f0), [return, _templ])
^  Exit: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), [return, _templ])
^  Call: (278) [user] read_list(')', (0x55aefe44e2f0), _483864)
^  Unify: (278) [user] read_list(')', (0x55aefe44e2f0), _483864)
^  Call: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] peek_char((0x55aefe44e2f0), _487578)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (280) [system] ')'=(;)
^  Redo: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (280) [user] is_like_space(')')
^  Unify: (280) [user] is_like_space(')')
   Call: (281) [system] char_type(')', 'white')
^  Redo: (280) [user] is_like_space(')')
^  Unify: (280) [user] is_like_space(')')
   Call: (281) [system] char_type(')', end_of_line)
^  Redo: (280) [user] is_like_space(')')
^  Unify: (280) [user] is_like_space(')')
   Call: (281) [system] char_type(')', space)
^  Redo: (280) [user] is_like_space(')')
^  Unify: (280) [user] is_like_space(')')
   Call: (281) [system] char_type(')', cntrl)
^  Redo: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _504362)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (279) [system] ')'=')'
   Exit: (279) [system] ')'=')'
   Call: (279) [system] get_char((0x55aefe44e2f0), _508152)
   Exit: (279) [system] get_char((0x55aefe44e2f0), ')')
   Call: (279) [system] _483864=[]
   Exit: (279) [system] []=[]
^  Exit: (278) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (278) [system] _23746=[[return, _templ]]
   Exit: (278) [system] [[return, _templ]]=[[return, _templ]]
^  Exit: (277) [user] read_list(')', (0x55aefe44e2f0), [[return, _templ]])
   Call: (277) [system] _6082=[_var, [return, _templ]]
   Exit: (277) [system] [_var, [return, _templ]]=[_var, [return, _templ]]
^  Exit: (276) [user] read_list(')', (0x55aefe44e2f0), [_var, [return, _templ]])
   Call: (276) [system] _6048=[[eval, [id, _atom]], _var, [return, _templ]]
   Exit: (276) [system] [[eval, [id, _atom]], _var, [return, _templ]]=[[eval, [id, _atom]], _var, [return, _templ]]
^  Exit: (275) [user] read_list(')', (0x55aefe44e2f0), [[eval, [id, _atom]], _var, [return, _templ]])
   Call: (275) [system] _6040=[chain, [eval, [id, _atom]], _var, [return, _templ]]
   Exit: (275) [system] [chain, [eval, [id, _atom]], _var, [return, _templ]]=[chain, [eval, [id, _atom]], _var, [return, _templ]]
^  Exit: (274) [user] read_list(')', (0x55aefe44e2f0), [chain, [eval, [id, _atom]], _var, [return, _templ]])
^  Exit: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), [chain, [eval, [id, _atom]], _var, [return, _templ]])
^  Call: (273) [user] read_list(')', (0x55aefe44e2f0), _6926)
^  Unify: (273) [user] read_list(')', (0x55aefe44e2f0), _6926)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _10640)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (275) [system] ')'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(')')
^  Unify: (275) [user] is_like_space(')')
   Call: (276) [system] char_type(')', 'white')
^  Redo: (275) [user] is_like_space(')')
^  Unify: (275) [user] is_like_space(')')
   Call: (276) [system] char_type(')', end_of_line)
^  Redo: (275) [user] is_like_space(')')
^  Unify: (275) [user] is_like_space(')')
   Call: (276) [system] char_type(')', space)
^  Redo: (275) [user] is_like_space(')')
^  Unify: (275) [user] is_like_space(')')
   Call: (276) [system] char_type(')', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _27424)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (274) [system] ')'=')'
   Exit: (274) [system] ')'=')'
   Call: (274) [system] get_char((0x55aefe44e2f0), _31214)
   Exit: (274) [system] get_char((0x55aefe44e2f0), ')')
   Call: (274) [system] _6926=[]
   Exit: (274) [system] []=[]
^  Exit: (273) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (273) [system] _6036=[[chain, [eval, [id, _atom]], _var, [return, _templ]]]
   Exit: (273) [system] [[chain, [eval, [id, _atom]], _var, [return, _templ]]]=[[chain, [eval, [id, _atom]], _var, [return, _templ]]]
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), [[chain, [eval, [id, _atom]], _var, [return, _templ]]])
   Call: (272) [system] _6028=[function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]
   Exit: (272) [system] [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]=[function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]])
^  Exit: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]])
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _42302)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _42302)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _46016)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (272) [system] ' '=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(' ')
^  Unify: (272) [user] is_like_space(' ')
   Call: (273) [system] char_type(' ', 'white')
   Exit: (273) [system] char_type(' ', 'white')
^  Exit: (272) [user] is_like_space(' ')
   Call: (272) [system] get_char((0x55aefe44e2f0), _54674)
   Exit: (272) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _58302)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (273) [system] ')'=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', 'white')
^  Redo: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', end_of_line)
^  Redo: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', space)
^  Redo: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _76010)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (271) [system] ')'=')'
   Exit: (271) [system] ')'=')'
   Call: (271) [system] get_char((0x55aefe44e2f0), _79800)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ')')
   Call: (271) [system] _42302=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (270) [system] _6024=[[function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]
   Exit: (270) [system] [[function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]=[[function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]
^  Exit: (269) [user] read_list(')', (0x55aefe44e2f0), [[function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
   Call: (269) [system] _5982=[[apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]
   Exit: (269) [system] [[apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]=[[apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]
^  Exit: (268) [user] read_list(')', (0x55aefe44e2f0), [[apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
   Call: (268) [system] _5942=[=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]
   Exit: (268) [system] [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]=[=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]
^  Exit: (267) [user] read_list(')', (0x55aefe44e2f0), [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Exit: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Exit: (265) [user] read_sexpr((0x55aefe44e2f0), [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Call: (265) [user] assertz(metta_file_comment(24, 0, 660, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], '$stream_position'(660, 24, 0, 660)))
^  Exit: (265) [user] assertz(metta_file_comment(24, 0, 660, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], '$stream_position'(660, 24, 0, 660)))
^  Exit: (263) [system] once(user:(read_position((0x55aefe44e2f0), 24, 0, 660, '$stream_position'(660, 24, 0, 660)), read_sexpr((0x55aefe44e2f0), [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]), assertz(metta_file_comment(24, 0, 660, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], '$stream_position'(660, 24, 0, 660)))))
   Call: (263) [system] fail
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Call: (263) [user] retract(metta_file_comment(_100174, _100176, _100178, _100180, _100182))
^  Exit: (263) [user] retract(metta_file_comment(24, 0, 660, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], '$stream_position'(660, 24, 0, 660)))
^  Call: (263) [user] trly(untyped_to_metta, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _5908)
^  Call: (264) [user] once(call(untyped_to_metta, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _104062))
^  Unify: (264) [system] once(user:call(untyped_to_metta, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _104062))
^  Call: (265) [user] call(untyped_to_metta, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _104062)
^  Unify: (265) [system] call(user:untyped_to_metta, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _104062)
^  Call: (266) [user] untyped_to_metta([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _104062)
^  Unify: (266) [user] untyped_to_metta([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _104062)
^  Call: (267) [user] must_det_ll(trly(mfix_vars1, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _109674))
^  Unify: (267) [user] must_det_ll(user:trly(mfix_vars1, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _109674))
^  Call: (268) [user] once(user:trly(mfix_vars1, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _109674))
^  Unify: (268) [system] once(user:trly(mfix_vars1, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _109674))
^  Call: (269) [user] trly(mfix_vars1, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _109674)
^  Unify: (269) [user] trly(mfix_vars1, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _109674)
^  Call: (270) [user] once(call(mfix_vars1, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260))
^  Unify: (270) [system] once(user:call(mfix_vars1, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260))
^  Call: (271) [user] call(mfix_vars1, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260)
^  Unify: (271) [system] call(user:mfix_vars1, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260)
^  Call: (272) [user] mfix_vars1([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260)
^  Unify: (272) [user] mfix_vars1([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260)
   Call: (273) [system] var([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Redo: (272) [user] mfix_vars1([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260)
^  Unify: (272) [user] mfix_vars1([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], '$VAR'(_122720))
   Call: (273) [system] atom([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Redo: (272) [user] mfix_vars1([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260)
^  Unify: (272) [user] mfix_vars1([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260)
   Call: (273) [system] [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]==true
^  Redo: (272) [user] mfix_vars1([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260)
^  Unify: (272) [user] mfix_vars1([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260)
   Call: (273) [system] [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]==false
^  Redo: (272) [user] mfix_vars1([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260)
^  Unify: (272) [user] mfix_vars1([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260)
   Call: (273) [system] (=)=='['
^  Redo: (272) [user] mfix_vars1([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260)
^  Unify: (272) [user] mfix_vars1([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260)
   Call: (273) [system] (=)=='{'
^  Redo: (272) [user] mfix_vars1([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260)
^  Unify: (272) [user] mfix_vars1([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260)
   Call: (273) [system] is_list([[apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
   Exit: (273) [system] is_list([[apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
   Call: (273) [lists] lists:last([[apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _139414)
   Unify: (273) [lists] lists:last([[apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _139414)
   Call: (274) [lists] lists:last_([[function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [apply, _atom, _var, _templ], _139414)
   Unify: (274) [lists] lists:last_([[function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [apply, _atom, _var, _templ], _139414)
   Call: (275) [lists] lists:last_([], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]], _139414)
   Unify: (275) [lists] lists:last_([], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]])
   Exit: (275) [lists] lists:last_([], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]])
   Exit: (274) [lists] lists:last_([[function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]])
   Exit: (273) [lists] lists:last([[apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]])
   Call: (273) [system] [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]=='}'
^  Redo: (272) [user] mfix_vars1([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260)
^  Unify: (272) [user] mfix_vars1([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260)
   Call: (273) [system] [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]==[_150578, _150584]
^  Redo: (272) [user] mfix_vars1([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260)
^  Unify: (272) [user] mfix_vars1([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260)
   Call: (273) [system] fail
^  Redo: (272) [user] mfix_vars1([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260)
^  Unify: (272) [user] mfix_vars1([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260)
   Call: (273) [system] is_list([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
   Exit: (273) [system] is_list([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Call: (273) [user] apply:maplist(mfix_vars1, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260)
^  Unify: (273) [apply] apply:maplist(user:mfix_vars1, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260)
   Call: (274) [apply] apply:maplist_([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _115260, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [_160808|_160810], user:mfix_vars1)
^  Call: (275) [user] mfix_vars1(=, _160808)
^  Unify: (275) [user] mfix_vars1(=, _160808)
   Call: (276) [system] var(=)
^  Redo: (275) [user] mfix_vars1(=, _160808)
^  Unify: (275) [user] mfix_vars1(=, '$VAR'(_165454))
   Call: (276) [system] atom(=)
   Exit: (276) [system] atom(=)
^  Call: (276) [user] symbol_concat($, _168232, =)
^  Unify: (276) [user] symbol_concat($, _168232, =)
   Call: (277) [system] atom_concat($, _168232, =)
   Fail: (277) [system] atom_concat($, _168232, =)
^  Fail: (276) [user] symbol_concat($, _168232, =)
^  Redo: (275) [user] mfix_vars1(=, _160808)
^  Unify: (275) [user] mfix_vars1(=, _160808)
   Call: (276) [system] (=)==true
^  Redo: (275) [user] mfix_vars1(=, _160808)
^  Unify: (275) [user] mfix_vars1(=, _160808)
   Call: (276) [system] (=)==false
^  Redo: (275) [user] mfix_vars1(=, _160808)
^  Unify: (275) [user] mfix_vars1(=, _160808)
   Call: (276) [system] (=)==[_180320, _180326]
^  Redo: (275) [user] mfix_vars1(=, _160808)
^  Unify: (275) [user] mfix_vars1(=, _160808)
   Call: (276) [system] is_list(=)
^  Redo: (275) [user] mfix_vars1(=, _160808)
^  Unify: (275) [user] mfix_vars1(=, _160808)
   Call: (276) [system] string(=)
^  Redo: (275) [user] mfix_vars1(=, _160808)
^  Unify: (275) [user] mfix_vars1(=, _160808)
   Call: (276) [system] compound(=)
^  Redo: (275) [user] mfix_vars1(=, _160808)
^  Unify: (275) [user] mfix_vars1(=, _160808)
^  Call: (276) [user] symbol(=)
^  Unify: (276) [user] symbol(=)
   Call: (277) [system] atom(=)
   Exit: (277) [system] atom(=)
^  Exit: (276) [user] symbol(=)
^  Unify: (275) [user] mfix_vars1(=, =)
^  Exit: (275) [user] mfix_vars1(=, =)
   Call: (275) [apply] apply:maplist_([[apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _160810, user:mfix_vars1)
   Unify: (275) [apply] apply:maplist_([[apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [_198864|_198866], user:mfix_vars1)
^  Call: (276) [user] mfix_vars1([apply, _atom, _var, _templ], _198864)
^  Unify: (276) [user] mfix_vars1([apply, _atom, _var, _templ], _198864)
   Call: (277) [system] var([apply, _atom, _var, _templ])
^  Redo: (276) [user] mfix_vars1([apply, _atom, _var, _templ], _198864)
^  Unify: (276) [user] mfix_vars1([apply, _atom, _var, _templ], '$VAR'(_203510))
   Call: (277) [system] atom([apply, _atom, _var, _templ])
^  Redo: (276) [user] mfix_vars1([apply, _atom, _var, _templ], _198864)
^  Unify: (276) [user] mfix_vars1([apply, _atom, _var, _templ], _198864)
   Call: (277) [system] [apply, _atom, _var, _templ]==true
^  Redo: (276) [user] mfix_vars1([apply, _atom, _var, _templ], _198864)
^  Unify: (276) [user] mfix_vars1([apply, _atom, _var, _templ], _198864)
   Call: (277) [system] [apply, _atom, _var, _templ]==false
^  Redo: (276) [user] mfix_vars1([apply, _atom, _var, _templ], _198864)
^  Unify: (276) [user] mfix_vars1([apply, _atom, _var, _templ], _198864)
   Call: (277) [system] apply=='['
^  Redo: (276) [user] mfix_vars1([apply, _atom, _var, _templ], _198864)
^  Unify: (276) [user] mfix_vars1([apply, _atom, _var, _templ], _198864)
   Call: (277) [system] apply=='{'
^  Redo: (276) [user] mfix_vars1([apply, _atom, _var, _templ], _198864)
^  Unify: (276) [user] mfix_vars1([apply, _atom, _var, _templ], _198864)
   Call: (277) [system] is_list([_atom, _var, _templ])
   Exit: (277) [system] is_list([_atom, _var, _templ])
   Call: (277) [lists] lists:last([_atom, _var, _templ], _220204)
   Unify: (277) [lists] lists:last([_atom, _var, _templ], _220204)
   Call: (278) [lists] lists:last_([_var, _templ], _atom, _220204)
   Unify: (278) [lists] lists:last_([_var, _templ], _atom, _220204)
   Call: (279) [lists] lists:last_([_templ], _var, _220204)
   Unify: (279) [lists] lists:last_([_templ], _var, _220204)
   Call: (280) [lists] lists:last_([], _templ, _220204)
   Unify: (280) [lists] lists:last_([], _templ, _templ)
   Exit: (280) [lists] lists:last_([], _templ, _templ)
   Exit: (279) [lists] lists:last_([_templ], _var, _templ)
   Exit: (278) [lists] lists:last_([_var, _templ], _atom, _templ)
   Exit: (277) [lists] lists:last([_atom, _var, _templ], _templ)
   Call: (277) [system] _templ=='}'
^  Redo: (276) [user] mfix_vars1([apply, _atom, _var, _templ], _198864)
^  Unify: (276) [user] mfix_vars1([apply, _atom, _var, _templ], _198864)
   Call: (277) [system] [apply, _atom, _var, _templ]==[_234164, _234170]
^  Redo: (276) [user] mfix_vars1([apply, _atom, _var, _templ], _198864)
^  Unify: (276) [user] mfix_vars1([apply, _atom, _var, _templ], _198864)
   Call: (277) [system] fail
^  Redo: (276) [user] mfix_vars1([apply, _atom, _var, _templ], _198864)
^  Unify: (276) [user] mfix_vars1([apply, _atom, _var, _templ], _198864)
   Call: (277) [system] is_list([apply, _atom, _var, _templ])
   Exit: (277) [system] is_list([apply, _atom, _var, _templ])
^  Call: (277) [user] apply:maplist(mfix_vars1, [apply, _atom, _var, _templ], _198864)
^  Unify: (277) [apply] apply:maplist(user:mfix_vars1, [apply, _atom, _var, _templ], _198864)
   Call: (278) [apply] apply:maplist_([apply, _atom, _var, _templ], _198864, user:mfix_vars1)
   Unify: (278) [apply] apply:maplist_([apply, _atom, _var, _templ], [_244394|_244396], user:mfix_vars1)
^  Call: (279) [user] mfix_vars1(apply, _244394)
^  Unify: (279) [user] mfix_vars1(apply, _244394)
   Call: (280) [system] var(apply)
^  Redo: (279) [user] mfix_vars1(apply, _244394)
^  Unify: (279) [user] mfix_vars1(apply, '$VAR'(_249040))
   Call: (280) [system] atom(apply)
   Exit: (280) [system] atom(apply)
^  Call: (280) [user] symbol_concat($, _251818, apply)
^  Unify: (280) [user] symbol_concat($, _251818, apply)
   Call: (281) [system] atom_concat($, _251818, apply)
   Fail: (281) [system] atom_concat($, _251818, apply)
^  Fail: (280) [user] symbol_concat($, _251818, apply)
^  Redo: (279) [user] mfix_vars1(apply, _244394)
^  Unify: (279) [user] mfix_vars1(apply, _244394)
   Call: (280) [system] apply==true
^  Redo: (279) [user] mfix_vars1(apply, _244394)
^  Unify: (279) [user] mfix_vars1(apply, _244394)
   Call: (280) [system] apply==false
^  Redo: (279) [user] mfix_vars1(apply, _244394)
^  Unify: (279) [user] mfix_vars1(apply, _244394)
   Call: (280) [system] apply==[_263906, _263912]
^  Redo: (279) [user] mfix_vars1(apply, _244394)
^  Unify: (279) [user] mfix_vars1(apply, _244394)
   Call: (280) [system] is_list(apply)
^  Redo: (279) [user] mfix_vars1(apply, _244394)
^  Unify: (279) [user] mfix_vars1(apply, _244394)
   Call: (280) [system] string(apply)
^  Redo: (279) [user] mfix_vars1(apply, _244394)
^  Unify: (279) [user] mfix_vars1(apply, _244394)
   Call: (280) [system] compound(apply)
^  Redo: (279) [user] mfix_vars1(apply, _244394)
^  Unify: (279) [user] mfix_vars1(apply, _244394)
^  Call: (280) [user] symbol(apply)
^  Unify: (280) [user] symbol(apply)
   Call: (281) [system] atom(apply)
   Exit: (281) [system] atom(apply)
^  Exit: (280) [user] symbol(apply)
^  Unify: (279) [user] mfix_vars1(apply, apply)
^  Exit: (279) [user] mfix_vars1(apply, apply)
   Call: (279) [apply] apply:maplist_([_atom, _var, _templ], _244396, user:mfix_vars1)
   Unify: (279) [apply] apply:maplist_([_atom, _var, _templ], [_282450|_282452], user:mfix_vars1)
^  Call: (280) [user] mfix_vars1(_atom, _282450)
^  Unify: (280) [user] mfix_vars1(_atom, _282450)
   Call: (281) [system] var(_atom)
^  Redo: (280) [user] mfix_vars1(_atom, _282450)
^  Unify: (280) [user] mfix_vars1(_atom, '$VAR'(_287096))
   Call: (281) [system] atom(_atom)
^  Redo: (280) [user] mfix_vars1(_atom, _282450)
^  Unify: (280) [user] mfix_vars1(_atom, _282450)
   Call: (281) [system] _atom==true
^  Redo: (280) [user] mfix_vars1(_atom, _282450)
^  Unify: (280) [user] mfix_vars1(_atom, _282450)
   Call: (281) [system] _atom==false
^  Redo: (280) [user] mfix_vars1(_atom, _282450)
^  Unify: (280) [user] mfix_vars1(_atom, _282450)
   Call: (281) [system] _atom==[_296376, _296382]
^  Redo: (280) [user] mfix_vars1(_atom, _282450)
^  Unify: (280) [user] mfix_vars1(_atom, _282450)
   Call: (281) [system] is_list(_atom)
^  Redo: (280) [user] mfix_vars1(_atom, _282450)
^  Unify: (280) [user] mfix_vars1(_atom, _282450)
   Call: (281) [system] string(_atom)
^  Redo: (280) [user] mfix_vars1(_atom, _282450)
^  Unify: (280) [user] mfix_vars1(_atom, _282450)
   Call: (281) [system] compound(_atom)
   Exit: (281) [system] compound(_atom)
   Call: (281) [system] compound_name_arguments(_atom, _306578, _306580)
   Exit: (281) [system] compound_name_arguments(_atom, '$VAR', ['_atom'])
   Call: (281) [system] '$VAR'\=='$VAR'
^  Redo: (269) [user] trly(mfix_vars1, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _109674)
^  Unify: (269) [user] trly(mfix_vars1, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Exit: (269) [user] trly(mfix_vars1, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Exit: (268) [system] once(user:trly(mfix_vars1, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]))
^  Exit: (267) [user] must_det_ll(user:trly(mfix_vars1, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]))
^  Call: (267) [user] must_det_ll(trly(cons_to_c, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _314036))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_c, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _314036))
^  Call: (268) [user] once(user:trly(cons_to_c, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _314036))
^  Unify: (268) [system] once(user:trly(cons_to_c, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _314036))
^  Call: (269) [user] trly(cons_to_c, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _314036)
^  Unify: (269) [user] trly(cons_to_c, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _314036)
^  Call: (270) [user] once(call(cons_to_c, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _319622))
^  Unify: (270) [system] once(user:call(cons_to_c, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _319622))
^  Call: (271) [user] call(cons_to_c, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _319622)
^  Unify: (271) [system] call(user:cons_to_c, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _319622)
^  Call: (272) [user] cons_to_c([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _319622)
^  Unify: (272) [user] cons_to_c([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_c([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Exit: (271) [system] call(user:cons_to_c, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Exit: (270) [system] once(user:call(cons_to_c, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]))
   Call: (270) [system] [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]\=@=[=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]
^  Redo: (269) [user] trly(cons_to_c, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _314036)
^  Unify: (269) [user] trly(cons_to_c, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Exit: (269) [user] trly(cons_to_c, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Exit: (268) [system] once(user:trly(cons_to_c, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_c, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]))
^  Call: (267) [user] must_det_ll(trly(cons_to_l, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _104062))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_l, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _104062))
^  Call: (268) [user] once(user:trly(cons_to_l, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _104062))
^  Unify: (268) [system] once(user:trly(cons_to_l, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _104062))
^  Call: (269) [user] trly(cons_to_l, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _104062)
^  Unify: (269) [user] trly(cons_to_l, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _104062)
^  Call: (270) [user] once(call(cons_to_l, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _341942))
^  Unify: (270) [system] once(user:call(cons_to_l, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _341942))
^  Call: (271) [user] call(cons_to_l, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _341942)
^  Unify: (271) [system] call(user:cons_to_l, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _341942)
^  Call: (272) [user] cons_to_l([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _341942)
^  Unify: (272) [user] cons_to_l([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_l([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Exit: (271) [system] call(user:cons_to_l, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Exit: (270) [system] once(user:call(cons_to_l, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]))
   Call: (270) [system] [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]\=@=[=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]
^  Redo: (269) [user] trly(cons_to_l, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _104062)
^  Unify: (269) [user] trly(cons_to_l, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Exit: (269) [user] trly(cons_to_l, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Exit: (268) [system] once(user:trly(cons_to_l, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_l, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]))
^  Exit: (266) [user] untyped_to_metta([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Exit: (265) [system] call(user:untyped_to_metta, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Exit: (264) [system] once(user:call(untyped_to_metta, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]))
   Call: (264) [system] [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]\=@=[=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]]
^  Redo: (263) [user] trly(untyped_to_metta, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Exit: (263) [user] trly(untyped_to_metta, [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Exit: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
   Call: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])))
   Unify: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])))
   Exit: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])))
^  Exit: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Exit: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Call: (257) [user] subst_vars([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _376250, [], _376252)
^  Unify: (257) [user] subst_vars([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [], [])
   Call: (258) [system] var([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Redo: (257) [user] subst_vars([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _376250, [], _376252)
^  Unify: (257) [user] subst_vars([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [_379988|_379990], [], _376252)
^  Call: (258) [user] subst_vars(=, _379988, [], _380928)
^  Unify: (258) [user] subst_vars(=, =, [], [])
   Call: (259) [system] var(=)
^  Redo: (258) [user] subst_vars(=, _379988, [], _380928)
^  Unify: (258) [user] subst_vars(=, _379988, [], _380928)
   Call: (259) [system] atom(=)
   Exit: (259) [system] atom(=)
^  Call: (259) [user] symbol_concat($, _387446, =)
^  Unify: (259) [user] symbol_concat($, _387446, =)
   Call: (260) [system] atom_concat($, _387446, =)
   Fail: (260) [system] atom_concat($, _387446, =)
^  Fail: (259) [user] symbol_concat($, _387446, =)
^  Redo: (258) [user] subst_vars(=, _379988, [], _380928)
^  Unify: (258) [user] subst_vars(=, _379988, [], _380928)
   Call: (259) [system] compound(=)
^  Redo: (258) [user] subst_vars(=, _379988, [], _380928)
^  Unify: (258) [user] subst_vars(=, =, [], [])
^  Exit: (258) [user] subst_vars(=, =, [], [])
^  Call: (258) [user] subst_vars([[apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _379990, [], _376252)
^  Unify: (258) [user] subst_vars([[apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [[apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [], [])
   Call: (259) [system] var([[apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Redo: (258) [user] subst_vars([[apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _379990, [], _376252)
^  Unify: (258) [user] subst_vars([[apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [_401446|_401448], [], _376252)
^  Call: (259) [user] subst_vars([apply, _atom, _var, _templ], _401446, [], _402386)
^  Unify: (259) [user] subst_vars([apply, _atom, _var, _templ], [apply, _atom, _var, _templ], [], [])
   Call: (260) [system] var([apply, _atom, _var, _templ])
^  Redo: (259) [user] subst_vars([apply, _atom, _var, _templ], _401446, [], _402386)
^  Unify: (259) [user] subst_vars([apply, _atom, _var, _templ], [_406122|_406124], [], _402386)
^  Call: (260) [user] subst_vars(apply, _406122, [], _407062)
^  Unify: (260) [user] subst_vars(apply, apply, [], [])
   Call: (261) [system] var(apply)
^  Redo: (260) [user] subst_vars(apply, _406122, [], _407062)
^  Unify: (260) [user] subst_vars(apply, _406122, [], _407062)
   Call: (261) [system] atom(apply)
   Exit: (261) [system] atom(apply)
^  Call: (261) [user] symbol_concat($, _413580, apply)
^  Unify: (261) [user] symbol_concat($, _413580, apply)
   Call: (262) [system] atom_concat($, _413580, apply)
   Fail: (262) [system] atom_concat($, _413580, apply)
^  Fail: (261) [user] symbol_concat($, _413580, apply)
^  Redo: (260) [user] subst_vars(apply, _406122, [], _407062)
^  Unify: (260) [user] subst_vars(apply, _406122, [], _407062)
   Call: (261) [system] compound(apply)
^  Redo: (260) [user] subst_vars(apply, _406122, [], _407062)
^  Unify: (260) [user] subst_vars(apply, apply, [], [])
^  Exit: (260) [user] subst_vars(apply, apply, [], [])
^  Call: (260) [user] subst_vars([_atom, _var, _templ], _406124, [], _402386)
^  Unify: (260) [user] subst_vars([_atom, _var, _templ], [_atom, _var, _templ], [], [])
   Call: (261) [system] var([_atom, _var, _templ])
^  Redo: (260) [user] subst_vars([_atom, _var, _templ], _406124, [], _402386)
^  Unify: (260) [user] subst_vars([_atom, _var, _templ], [_427580|_427582], [], _402386)
^  Call: (261) [user] subst_vars(_atom, _427580, [], _428520)
^  Unify: (261) [user] subst_vars(_atom, _atom, [], [])
   Call: (262) [system] var(_atom)
^  Redo: (261) [user] subst_vars(_atom, _427580, [], _428520)
^  Unify: (261) [user] subst_vars(_atom, _427580, [], _428520)
   Call: (262) [system] nonvar('_atom')
   Exit: (262) [system] nonvar('_atom')
^  Call: (262) [user] svar_fixvarname_dont_capitalize('_atom', _435038)
^  Unify: (262) [user] svar_fixvarname_dont_capitalize('_atom', '_atom')
^  Exit: (262) [user] svar_fixvarname_dont_capitalize('_atom', '_atom')
   Call: (262) [system] memberchk('_atom'=_427580, [])
   Unify: (262) [system] memberchk('_atom'=_427580, [])
^  Redo: (261) [user] subst_vars(_atom, _427580, [], _428520)
   Call: (262) [system] _428520=['_atom'=_427580]
   Exit: (262) [system] ['_atom'=_427580]=['_atom'=_427580]
^  Exit: (261) [user] subst_vars(_atom, _427580, [], ['_atom'=_427580])
^  Call: (261) [user] subst_vars([_var, _templ], _427582, ['_atom'=_427580], _402386)
^  Unify: (261) [user] subst_vars([_var, _templ], [_var, _templ], ['_atom'=_427580], ['_atom'=_427580])
   Call: (262) [system] var([_var, _templ])
^  Redo: (261) [user] subst_vars([_var, _templ], _427582, ['_atom'=_427580], _402386)
^  Unify: (261) [user] subst_vars([_var, _templ], [_447160|_447162], ['_atom'=_427580], _402386)
^  Call: (262) [user] subst_vars(_var, _447160, ['_atom'=_427580], _448100)
^  Unify: (262) [user] subst_vars(_var, _var, ['_atom'=_427580], ['_atom'=_427580])
   Call: (263) [system] var(_var)
^  Redo: (262) [user] subst_vars(_var, _447160, ['_atom'=_427580], _448100)
^  Unify: (262) [user] subst_vars(_var, _447160, ['_atom'=_427580], _448100)
   Call: (263) [system] nonvar('_var')
   Exit: (263) [system] nonvar('_var')
^  Call: (263) [user] svar_fixvarname_dont_capitalize('_var', _454618)
^  Unify: (263) [user] svar_fixvarname_dont_capitalize('_var', '_var')
^  Exit: (263) [user] svar_fixvarname_dont_capitalize('_var', '_var')
   Call: (263) [system] memberchk('_var'=_447160, ['_atom'=_427580])
   Unify: (263) [system] memberchk('_var'=_447160, ['_atom'=_427580])
^  Redo: (262) [user] subst_vars(_var, _447160, ['_atom'=_427580], _448100)
   Call: (263) [system] _448100=['_var'=_447160, '_atom'=_427580]
   Exit: (263) [system] ['_var'=_447160, '_atom'=_427580]=['_var'=_447160, '_atom'=_427580]
^  Exit: (262) [user] subst_vars(_var, _447160, ['_atom'=_427580], ['_var'=_447160, '_atom'=_427580])
^  Call: (262) [user] subst_vars([_templ], _447162, ['_var'=_447160, '_atom'=_427580], _402386)
^  Unify: (262) [user] subst_vars([_templ], [_templ], ['_var'=_447160, '_atom'=_427580], ['_var'=_447160, '_atom'=_427580])
   Call: (263) [system] var([_templ])
^  Redo: (262) [user] subst_vars([_templ], _447162, ['_var'=_447160, '_atom'=_427580], _402386)
^  Unify: (262) [user] subst_vars([_templ], [_466740|_466742], ['_var'=_447160, '_atom'=_427580], _402386)
^  Call: (263) [user] subst_vars(_templ, _466740, ['_var'=_447160, '_atom'=_427580], _467680)
^  Unify: (263) [user] subst_vars(_templ, _templ, ['_var'=_447160, '_atom'=_427580], ['_var'=_447160, '_atom'=_427580])
   Call: (264) [system] var(_templ)
^  Redo: (263) [user] subst_vars(_templ, _466740, ['_var'=_447160, '_atom'=_427580], _467680)
^  Unify: (263) [user] subst_vars(_templ, _466740, ['_var'=_447160, '_atom'=_427580], _467680)
   Call: (264) [system] nonvar('_templ')
   Exit: (264) [system] nonvar('_templ')
^  Call: (264) [user] svar_fixvarname_dont_capitalize('_templ', _474198)
^  Unify: (264) [user] svar_fixvarname_dont_capitalize('_templ', '_templ')
^  Exit: (264) [user] svar_fixvarname_dont_capitalize('_templ', '_templ')
   Call: (264) [system] memberchk('_templ'=_466740, ['_var'=_447160, '_atom'=_427580])
   Unify: (264) [system] memberchk('_templ'=_466740, ['_var'=_447160, '_atom'=_427580])
^  Redo: (263) [user] subst_vars(_templ, _466740, ['_var'=_447160, '_atom'=_427580], _467680)
   Call: (264) [system] _467680=['_templ'=_466740, '_var'=_447160, '_atom'=_427580]
   Exit: (264) [system] ['_templ'=_466740, '_var'=_447160, '_atom'=_427580]=['_templ'=_466740, '_var'=_447160, '_atom'=_427580]
^  Exit: (263) [user] subst_vars(_templ, _466740, ['_var'=_447160, '_atom'=_427580], ['_templ'=_466740, '_var'=_447160, '_atom'=_427580])
^  Call: (263) [user] subst_vars([], _466742, ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], _402386)
^  Unify: (263) [user] subst_vars([], [], ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], ['_templ'=_466740, '_var'=_447160, '_atom'=_427580])
   Call: (264) [system] var([])
^  Redo: (263) [user] subst_vars([], _466742, ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], _402386)
^  Unify: (263) [user] subst_vars([], [], ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], ['_templ'=_466740, '_var'=_447160, '_atom'=_427580])
^  Exit: (263) [user] subst_vars([], [], ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], ['_templ'=_466740, '_var'=_447160, '_atom'=_427580])
^  Exit: (262) [user] subst_vars([_templ], [_466740], ['_var'=_447160, '_atom'=_427580], ['_templ'=_466740, '_var'=_447160, '_atom'=_427580])
^  Exit: (261) [user] subst_vars([_var, _templ], [_447160, _466740], ['_atom'=_427580], ['_templ'=_466740, '_var'=_447160, '_atom'=_427580])
^  Exit: (260) [user] subst_vars([_atom, _var, _templ], [_427580, _447160, _466740], [], ['_templ'=_466740, '_var'=_447160, '_atom'=_427580])
^  Exit: (259) [user] subst_vars([apply, _atom, _var, _templ], [apply, _427580, _447160, _466740], [], ['_templ'=_466740, '_var'=_447160, '_atom'=_427580])
^  Call: (259) [user] subst_vars([[function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _401448, ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], _376252)
^  Unify: (259) [user] subst_vars([[function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [[function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], ['_templ'=_466740, '_var'=_447160, '_atom'=_427580])
   Call: (260) [system] var([[function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]])
^  Redo: (259) [user] subst_vars([[function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], _401448, ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], _376252)
^  Unify: (259) [user] subst_vars([[function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [_495668|_495670], ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], _376252)
^  Call: (260) [user] subst_vars([function, [chain, [eval, [id, _atom]], _var, [return, _templ]]], _495668, ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], _496608)
^  Unify: (260) [user] subst_vars([function, [chain, [eval, [id, _atom]], _var, [return, _templ]]], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]], ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], ['_templ'=_466740, '_var'=_447160, '_atom'=_427580])
   Call: (261) [system] var([function, [chain, [eval, [id, _atom]], _var, [return, _templ]]])
^  Redo: (260) [user] subst_vars([function, [chain, [eval, [id, _atom]], _var, [return, _templ]]], _495668, ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], _496608)
^  Unify: (260) [user] subst_vars([function, [chain, [eval, [id, _atom]], _var, [return, _templ]]], [_500344|_500346], ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], _496608)
^  Call: (261) [user] subst_vars(function, _500344, ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], _501284)
^  Unify: (261) [user] subst_vars(function, function, ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], ['_templ'=_466740, '_var'=_447160, '_atom'=_427580])
   Call: (262) [system] var(function)
^  Redo: (261) [user] subst_vars(function, _500344, ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], _501284)
^  Unify: (261) [user] subst_vars(function, _500344, ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], _501284)
   Call: (262) [system] atom(function)
   Exit: (262) [system] atom(function)
^  Call: (262) [user] symbol_concat($, _507802, function)
^  Unify: (262) [user] symbol_concat($, _507802, function)
   Call: (263) [system] atom_concat($, _507802, function)
   Fail: (263) [system] atom_concat($, _507802, function)
^  Fail: (262) [user] symbol_concat($, _507802, function)
^  Redo: (261) [user] subst_vars(function, _500344, ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], _501284)
^  Unify: (261) [user] subst_vars(function, _500344, ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], _501284)
   Call: (262) [system] compound(function)
^  Redo: (261) [user] subst_vars(function, _500344, ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], _501284)
^  Unify: (261) [user] subst_vars(function, function, ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], ['_templ'=_466740, '_var'=_447160, '_atom'=_427580])
^  Exit: (261) [user] subst_vars(function, function, ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], ['_templ'=_466740, '_var'=_447160, '_atom'=_427580])
^  Call: (261) [user] subst_vars([[chain, [eval, [id, _atom]], _var, [return, _templ]]], _500346, ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], _496608)
^  Unify: (261) [user] subst_vars([[chain, [eval, [id, _atom]], _var, [return, _templ]]], [[chain, [eval, [id, _atom]], _var, [return, _templ]]], ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], ['_templ'=_466740, '_var'=_447160, '_atom'=_427580])
   Call: (262) [system] var([[chain, [eval, [id, _atom]], _var, [return, _templ]]])
^  Redo: (261) [user] subst_vars([[chain, [eval, [id, _atom]], _var, [return, _templ]]], _500346, ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], _496608)
^  Unify: (261) [user] subst_vars([[chain, [eval, [id, _atom]], _var, [return, _templ]]], [_521802|_521804], ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], _496608)
^  Call: (262) [user] subst_vars([chain, [eval, [id, _atom]], _var, [return, _templ]], _521802, ['_templ'=_466740, '_var'=_447160, '_atom'=_427580], _522742)
^  Unify: (262) [user] subst_vars([chain, [eval, [id, _atom]], _var, [return, _templ]], [chain, [eval, [id, _atom]], _var, [return, _templ]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (263) [system] var([chain, [eval, [id, _atom]], _var, [return, _templ]])
^  Redo: (262) [user] subst_vars([chain, [eval, [id, _atom]], _var, [return, _templ]], _6146, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _6150)
^  Unify: (262) [user] subst_vars([chain, [eval, [id, _atom]], _var, [return, _templ]], [_8690|_8692], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _6150)
^  Call: (263) [user] subst_vars(chain, _8690, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _9630)
^  Unify: (263) [user] subst_vars(chain, chain, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (264) [system] var(chain)
^  Redo: (263) [user] subst_vars(chain, _8690, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _9630)
^  Unify: (263) [user] subst_vars(chain, _8690, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _9630)
   Call: (264) [system] atom(chain)
   Exit: (264) [system] atom(chain)
^  Call: (264) [user] symbol_concat($, _16148, chain)
^  Unify: (264) [user] symbol_concat($, _16148, chain)
   Call: (265) [system] atom_concat($, _16148, chain)
   Fail: (265) [system] atom_concat($, _16148, chain)
^  Fail: (264) [user] symbol_concat($, _16148, chain)
^  Redo: (263) [user] subst_vars(chain, _8690, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _9630)
^  Unify: (263) [user] subst_vars(chain, _8690, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _9630)
   Call: (264) [system] compound(chain)
^  Redo: (263) [user] subst_vars(chain, _8690, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _9630)
^  Unify: (263) [user] subst_vars(chain, chain, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (263) [user] subst_vars(chain, chain, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Call: (263) [user] subst_vars([[eval, [id, _atom]], _var, [return, _templ]], _8692, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _6150)
^  Unify: (263) [user] subst_vars([[eval, [id, _atom]], _var, [return, _templ]], [[eval, [id, _atom]], _var, [return, _templ]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (264) [system] var([[eval, [id, _atom]], _var, [return, _templ]])
^  Redo: (263) [user] subst_vars([[eval, [id, _atom]], _var, [return, _templ]], _8692, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _6150)
^  Unify: (263) [user] subst_vars([[eval, [id, _atom]], _var, [return, _templ]], [_30148|_30150], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _6150)
^  Call: (264) [user] subst_vars([eval, [id, _atom]], _30148, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _31088)
^  Unify: (264) [user] subst_vars([eval, [id, _atom]], [eval, [id, _atom]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (265) [system] var([eval, [id, _atom]])
^  Redo: (264) [user] subst_vars([eval, [id, _atom]], _30148, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _31088)
^  Unify: (264) [user] subst_vars([eval, [id, _atom]], [_34824|_34826], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _31088)
^  Call: (265) [user] subst_vars(eval, _34824, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _35764)
^  Unify: (265) [user] subst_vars(eval, eval, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (266) [system] var(eval)
^  Redo: (265) [user] subst_vars(eval, _34824, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _35764)
^  Unify: (265) [user] subst_vars(eval, _34824, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _35764)
   Call: (266) [system] atom(eval)
   Exit: (266) [system] atom(eval)
^  Call: (266) [user] symbol_concat($, _42282, eval)
^  Unify: (266) [user] symbol_concat($, _42282, eval)
   Call: (267) [system] atom_concat($, _42282, eval)
   Fail: (267) [system] atom_concat($, _42282, eval)
^  Fail: (266) [user] symbol_concat($, _42282, eval)
^  Redo: (265) [user] subst_vars(eval, _34824, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _35764)
^  Unify: (265) [user] subst_vars(eval, _34824, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _35764)
   Call: (266) [system] compound(eval)
^  Redo: (265) [user] subst_vars(eval, _34824, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _35764)
^  Unify: (265) [user] subst_vars(eval, eval, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (265) [user] subst_vars(eval, eval, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Call: (265) [user] subst_vars([[id, _atom]], _34826, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _31088)
^  Unify: (265) [user] subst_vars([[id, _atom]], [[id, _atom]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (266) [system] var([[id, _atom]])
^  Redo: (265) [user] subst_vars([[id, _atom]], _34826, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _31088)
^  Unify: (265) [user] subst_vars([[id, _atom]], [_56282|_56284], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _31088)
^  Call: (266) [user] subst_vars([id, _atom], _56282, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _57222)
^  Unify: (266) [user] subst_vars([id, _atom], [id, _atom], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (267) [system] var([id, _atom])
^  Redo: (266) [user] subst_vars([id, _atom], _56282, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _57222)
^  Unify: (266) [user] subst_vars([id, _atom], [_60958|_60960], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _57222)
^  Call: (267) [user] subst_vars(id, _60958, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _61898)
^  Unify: (267) [user] subst_vars(id, id, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (268) [system] var(id)
^  Redo: (267) [user] subst_vars(id, _60958, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _61898)
^  Unify: (267) [user] subst_vars(id, _60958, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _61898)
   Call: (268) [system] atom(id)
   Exit: (268) [system] atom(id)
^  Call: (268) [user] symbol_concat($, _68416, id)
^  Unify: (268) [user] symbol_concat($, _68416, id)
   Call: (269) [system] atom_concat($, _68416, id)
   Fail: (269) [system] atom_concat($, _68416, id)
^  Fail: (268) [user] symbol_concat($, _68416, id)
^  Redo: (267) [user] subst_vars(id, _60958, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _61898)
^  Unify: (267) [user] subst_vars(id, _60958, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _61898)
   Call: (268) [system] compound(id)
^  Redo: (267) [user] subst_vars(id, _60958, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _61898)
^  Unify: (267) [user] subst_vars(id, id, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (267) [user] subst_vars(id, id, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Call: (267) [user] subst_vars([_atom], _60960, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _57222)
^  Unify: (267) [user] subst_vars([_atom], [_atom], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (268) [system] var([_atom])
^  Redo: (267) [user] subst_vars([_atom], _60960, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _57222)
^  Unify: (267) [user] subst_vars([_atom], [_82416|_82418], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _57222)
^  Call: (268) [user] subst_vars(_atom, _82416, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _83356)
^  Unify: (268) [user] subst_vars(_atom, _atom, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (269) [system] var(_atom)
^  Redo: (268) [user] subst_vars(_atom, _82416, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _83356)
^  Unify: (268) [user] subst_vars(_atom, _82416, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _83356)
   Call: (269) [system] nonvar('_atom')
   Exit: (269) [system] nonvar('_atom')
^  Call: (269) [user] svar_fixvarname_dont_capitalize('_atom', _89874)
^  Unify: (269) [user] svar_fixvarname_dont_capitalize('_atom', '_atom')
^  Exit: (269) [user] svar_fixvarname_dont_capitalize('_atom', '_atom')
   Call: (269) [system] memberchk('_atom'=_82416, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Unify: (269) [system] memberchk('_atom'=_82416, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (270) [system] nonvar([])
   Exit: (270) [system] nonvar([])
   Exit: (269) [system] memberchk('_atom'=_6076, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (269) [system] _83356=['_templ'=_6112, '_var'=_6094, '_atom'=_6076]
   Exit: (269) [system] ['_templ'=_6112, '_var'=_6094, '_atom'=_6076]=['_templ'=_6112, '_var'=_6094, '_atom'=_6076]
^  Exit: (268) [user] subst_vars(_atom, _6076, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Call: (268) [user] subst_vars([], _82418, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _57222)
^  Unify: (268) [user] subst_vars([], [], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (269) [system] var([])
^  Redo: (268) [user] subst_vars([], _82418, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _57222)
^  Unify: (268) [user] subst_vars([], [], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (268) [user] subst_vars([], [], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (267) [user] subst_vars([_atom], [_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (266) [user] subst_vars([id, _atom], [id, _6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Call: (266) [user] subst_vars([], _56284, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _31088)
^  Unify: (266) [user] subst_vars([], [], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (267) [system] var([])
^  Redo: (266) [user] subst_vars([], _56284, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _31088)
^  Unify: (266) [user] subst_vars([], [], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (266) [user] subst_vars([], [], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (265) [user] subst_vars([[id, _atom]], [[id, _6076]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (264) [user] subst_vars([eval, [id, _atom]], [eval, [id, _6076]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Call: (264) [user] subst_vars([_var, [return, _templ]], _30150, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _6150)
^  Unify: (264) [user] subst_vars([_var, [return, _templ]], [_var, [return, _templ]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (265) [system] var([_var, [return, _templ]])
^  Redo: (264) [user] subst_vars([_var, [return, _templ]], _30150, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _6150)
^  Unify: (264) [user] subst_vars([_var, [return, _templ]], [_118778|_118780], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _6150)
^  Call: (265) [user] subst_vars(_var, _118778, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _119718)
^  Unify: (265) [user] subst_vars(_var, _var, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (266) [system] var(_var)
^  Redo: (265) [user] subst_vars(_var, _118778, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _119718)
^  Unify: (265) [user] subst_vars(_var, _118778, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _119718)
   Call: (266) [system] nonvar('_var')
   Exit: (266) [system] nonvar('_var')
^  Call: (266) [user] svar_fixvarname_dont_capitalize('_var', _126236)
^  Unify: (266) [user] svar_fixvarname_dont_capitalize('_var', '_var')
^  Exit: (266) [user] svar_fixvarname_dont_capitalize('_var', '_var')
   Call: (266) [system] memberchk('_var'=_118778, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Unify: (266) [system] memberchk('_var'=_118778, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (267) [system] nonvar([])
   Exit: (267) [system] nonvar([])
   Exit: (266) [system] memberchk('_var'=_6094, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (266) [system] _119718=['_templ'=_6112, '_var'=_6094, '_atom'=_6076]
   Exit: (266) [system] ['_templ'=_6112, '_var'=_6094, '_atom'=_6076]=['_templ'=_6112, '_var'=_6094, '_atom'=_6076]
^  Exit: (265) [user] subst_vars(_var, _6094, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Call: (265) [user] subst_vars([[return, _templ]], _118780, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _6150)
^  Unify: (265) [user] subst_vars([[return, _templ]], [[return, _templ]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (266) [system] var([[return, _templ]])
^  Redo: (265) [user] subst_vars([[return, _templ]], _118780, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _6150)
^  Unify: (265) [user] subst_vars([[return, _templ]], [_140188|_140190], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _6150)
^  Call: (266) [user] subst_vars([return, _templ], _140188, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _141128)
^  Unify: (266) [user] subst_vars([return, _templ], [return, _templ], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (267) [system] var([return, _templ])
^  Redo: (266) [user] subst_vars([return, _templ], _140188, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _141128)
^  Unify: (266) [user] subst_vars([return, _templ], [_144864|_144866], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _141128)
^  Call: (267) [user] subst_vars(return, _144864, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _145804)
^  Unify: (267) [user] subst_vars(return, return, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (268) [system] var(return)
^  Redo: (267) [user] subst_vars(return, _144864, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _145804)
^  Unify: (267) [user] subst_vars(return, _144864, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _145804)
   Call: (268) [system] atom(return)
   Exit: (268) [system] atom(return)
^  Call: (268) [user] symbol_concat($, _152322, return)
^  Unify: (268) [user] symbol_concat($, _152322, return)
   Call: (269) [system] atom_concat($, _152322, return)
   Fail: (269) [system] atom_concat($, _152322, return)
^  Fail: (268) [user] symbol_concat($, _152322, return)
^  Redo: (267) [user] subst_vars(return, _144864, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _145804)
^  Unify: (267) [user] subst_vars(return, _144864, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _145804)
   Call: (268) [system] compound(return)
^  Redo: (267) [user] subst_vars(return, _144864, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _145804)
^  Unify: (267) [user] subst_vars(return, return, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (267) [user] subst_vars(return, return, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Call: (267) [user] subst_vars([_templ], _144866, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _141128)
^  Unify: (267) [user] subst_vars([_templ], [_templ], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (268) [system] var([_templ])
^  Redo: (267) [user] subst_vars([_templ], _144866, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _141128)
^  Unify: (267) [user] subst_vars([_templ], [_166322|_166324], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _141128)
^  Call: (268) [user] subst_vars(_templ, _166322, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _167262)
^  Unify: (268) [user] subst_vars(_templ, _templ, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (269) [system] var(_templ)
^  Redo: (268) [user] subst_vars(_templ, _166322, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _167262)
^  Unify: (268) [user] subst_vars(_templ, _166322, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _167262)
   Call: (269) [system] nonvar('_templ')
   Exit: (269) [system] nonvar('_templ')
^  Call: (269) [user] svar_fixvarname_dont_capitalize('_templ', _173780)
^  Unify: (269) [user] svar_fixvarname_dont_capitalize('_templ', '_templ')
^  Exit: (269) [user] svar_fixvarname_dont_capitalize('_templ', '_templ')
   Call: (269) [system] memberchk('_templ'=_166322, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Unify: (269) [system] memberchk('_templ'=_166322, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (270) [system] nonvar([])
   Exit: (270) [system] nonvar([])
   Exit: (269) [system] memberchk('_templ'=_6112, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (269) [system] _167262=['_templ'=_6112, '_var'=_6094, '_atom'=_6076]
   Exit: (269) [system] ['_templ'=_6112, '_var'=_6094, '_atom'=_6076]=['_templ'=_6112, '_var'=_6094, '_atom'=_6076]
^  Exit: (268) [user] subst_vars(_templ, _6112, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Call: (268) [user] subst_vars([], _166324, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _141128)
^  Unify: (268) [user] subst_vars([], [], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (269) [system] var([])
^  Redo: (268) [user] subst_vars([], _166324, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _141128)
^  Unify: (268) [user] subst_vars([], [], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (268) [user] subst_vars([], [], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (267) [user] subst_vars([_templ], [_6112], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (266) [user] subst_vars([return, _templ], [return, _6112], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Call: (266) [user] subst_vars([], _140190, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _6150)
^  Unify: (266) [user] subst_vars([], [], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (267) [system] var([])
^  Redo: (266) [user] subst_vars([], _140190, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _6150)
^  Unify: (266) [user] subst_vars([], [], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (266) [user] subst_vars([], [], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (265) [user] subst_vars([[return, _templ]], [[return, _6112]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (264) [user] subst_vars([_var, [return, _templ]], [_6094, [return, _6112]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (263) [user] subst_vars([[eval, [id, _atom]], _var, [return, _templ]], [[eval, [id, _6076]], _6094, [return, _6112]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (262) [user] subst_vars([chain, [eval, [id, _atom]], _var, [return, _templ]], [chain, [eval, [id, _6076]], _6094, [return, _6112]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Call: (262) [user] subst_vars([], _6148, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _6134)
^  Unify: (262) [user] subst_vars([], [], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (263) [system] var([])
^  Redo: (262) [user] subst_vars([], _6148, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _6134)
^  Unify: (262) [user] subst_vars([], [], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (262) [user] subst_vars([], [], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (261) [user] subst_vars([[chain, [eval, [id, _atom]], _var, [return, _templ]]], [[chain, [eval, [id, _6076]], _6094, [return, _6112]]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (260) [user] subst_vars([function, [chain, [eval, [id, _atom]], _var, [return, _templ]]], [function, [chain, [eval, [id, _6076]], _6094, [return, _6112]]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Call: (260) [user] subst_vars([], _6132, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _6050)
^  Unify: (260) [user] subst_vars([], [], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (261) [system] var([])
^  Redo: (260) [user] subst_vars([], _6132, ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], _6050)
^  Unify: (260) [user] subst_vars([], [], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (260) [user] subst_vars([], [], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (259) [user] subst_vars([[function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [[function, [chain, [eval, [id, _6076]], _6094, [return, _6112]]]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (258) [user] subst_vars([[apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [[apply, _6076, _6094, _6112], [function, [chain, [eval, [id, _6076]], _6094, [return, _6112]]]], [], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
^  Exit: (257) [user] subst_vars([=, [apply, _atom, _var, _templ], [function, [chain, [eval, [id, _atom]], _var, [return, _templ]]]], [=, [apply, _6076, _6094, _6112], [function, [chain, [eval, [id, _6076]], _6094, [return, _6112]]]], [], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076])
   Call: (257) [system] _216710=metta_file_buffer(+, [=, [apply, _6076, _6094, _6112], [function, [chain, [eval, [id, _6076]], _6094, [return, _6112]]]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(659, 23, 38, 659))
   Exit: (257) [system] metta_file_buffer(+, [=, [apply, _6076, _6094, _6112], [function, [chain, [eval, [id, _6076]], _6094, [return, _6112]]]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(659, 23, 38, 659))=metta_file_buffer(+, [=, [apply, _6076, _6094, _6112], [function, [chain, [eval, [id, _6076]], _6094, [return, _6112]]]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(659, 23, 38, 659))
^  Call: (257) [user] assertz(metta_file_buffer(+, [=, [apply, _6076, _6094, _6112], [function, [chain, [eval, [id, _6076]], _6094, [return, _6112]]]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(659, 23, 38, 659)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, [=, [apply, _6076, _6094, _6112], [function, [chain, [eval, [id, _6076]], _6094, [return, _6112]]]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(659, 23, 38, 659)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [=, [apply, _6076, _6094, _6112], [function, [chain, [eval, [id, _6076]], _6094, [return, _6112]]]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(659, 23, 38, 659))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [=, [apply, _6076, _6094, _6112], [function, [chain, [eval, [id, _6076]], _6094, [return, _6112]]]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(659, 23, 38, 659))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [=, [apply, _6076, _6094, _6112], [function, [chain, [eval, [id, _6076]], _6094, [return, _6112]]]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(659, 23, 38, 659))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [=, [apply, _6076, _6094, _6112], [function, [chain, [eval, [id, _6076]], _6094, [return, _6112]]]], ['_templ'=_6112, '_var'=_6094, '_atom'=_6076], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(659, 23, 38, 659))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
   Redo: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _267504)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _268442))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _268442)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 750)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _267504)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _267504)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_267504))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_267504))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_267504))
   Exit: (259) [system] nonvar(position(_267504))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(750, 25, 61, 750)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(750, 25, 61, 750))
   Call: (257) [user] current_read_mode(file, _287922)
   Unify: (257) [user] current_read_mode(file, _287922)
   Call: (258) [system] nb_current(file_mode, _287922)
   Redo: (257) [user] current_read_mode(file, _287922)
   Call: (258) [system] _287922=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _294372)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _294372)
^  Call: (258) [user] clause(t_l:s_reader_info(_294372), _296318, _296240)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _294372)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _294372)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _294372)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _294372)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _294372)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _294372)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _294372)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _294372)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _310148)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (260) [system] char_type('\n', space)
   Exit: (260) [system] char_type('\n', space)
   Call: (260) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (260) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _294372)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _294372)
   Call: (261) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _294372)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _294372)
   Call: (261) [system] peek_char((0x55aefe44e2f0), _320354)
   Exit: (261) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (261) [system] char_type('\n', space)
   Exit: (261) [system] char_type('\n', space)
   Call: (261) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (261) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _294372)
^  Unify: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _294372)
   Call: (262) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _294372)
^  Unify: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _294372)
   Call: (262) [system] peek_char((0x55aefe44e2f0), _330560)
   Exit: (262) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (262) [system] char_type('(', space)
^  Redo: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _294372)
^  Unify: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _294372)
^  Call: (262) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (262) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (263) [system] string((0x55aefe44e2f0))
^  Redo: (262) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (262) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (262) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _294372)
^  Unify: (262) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _294372)
^  Call: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _294372)
^  Unify: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _294372)
   Call: (264) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _294372)
^  Unify: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _294372)
   Call: (264) [system] peek_char((0x55aefe44e2f0), _346314)
   Exit: (264) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (264) [system] char_type('(', space)
^  Redo: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _294372)
^  Unify: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _294372)
   Call: (264) [system] _350956=(0x55aefe44e2f0)
   Exit: (264) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (264) [user] once((read_position((0x55aefe44e2f0), _352824, _352826, _352828, _352830), read_sexpr((0x55aefe44e2f0), _352842), assertz(metta_file_comment(_352824, _352826, _352828, _352842, _352830))))
^  Unify: (264) [system] once(user:(read_position((0x55aefe44e2f0), _352824, _352826, _352828, _352830), read_sexpr((0x55aefe44e2f0), _352842), assertz(metta_file_comment(_352824, _352826, _352828, _352842, _352830))))
^  Call: (266) [user] read_position((0x55aefe44e2f0), _352824, _352826, _352828, _352830)
^  Unify: (266) [user] read_position((0x55aefe44e2f0), _352824, _352826, _352828, _352830)
   Call: (267) [system] stream_property((0x55aefe44e2f0), position(_352830))
   Unify: (267) [system] stream_property((0x55aefe44e2f0), position(_352830))
   Call: (268) [system] nonvar((0x55aefe44e2f0))
   Exit: (268) [system] nonvar((0x55aefe44e2f0))
   Call: (268) [system] nonvar(position(_352830))
   Exit: (268) [system] nonvar(position(_352830))
   Exit: (267) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(752, 27, 0, 752)))
   Call: (267) [$syspreds] stream_position_data(line_count, '$stream_position'(752, 27, 0, 752), _352824)
   Unify: (267) [$syspreds] stream_position_data(line_count, '$stream_position'(752, 27, 0, 752), _352824)
   Call: (268) [system] nonvar(line_count)
   Exit: (268) [system] nonvar(line_count)
   Call: (268) [$syspreds] stream_position_field(line_count, _366812)
   Unify: (268) [$syspreds] stream_position_field(line_count, 2)
   Exit: (268) [$syspreds] stream_position_field(line_count, 2)
   Call: (268) [system] arg(2, '$stream_position'(752, 27, 0, 752), _352824)
   Exit: (268) [system] arg(2, '$stream_position'(752, 27, 0, 752), 27)
   Exit: (267) [$syspreds] stream_position_data(line_count, '$stream_position'(752, 27, 0, 752), 27)
   Call: (267) [$syspreds] stream_position_data(line_position, '$stream_position'(752, 27, 0, 752), _352826)
   Unify: (267) [$syspreds] stream_position_data(line_position, '$stream_position'(752, 27, 0, 752), _352826)
   Call: (268) [system] nonvar(line_position)
   Exit: (268) [system] nonvar(line_position)
   Call: (268) [$syspreds] stream_position_field(line_position, _376106)
   Unify: (268) [$syspreds] stream_position_field(line_position, 3)
   Exit: (268) [$syspreds] stream_position_field(line_position, 3)
   Call: (268) [system] arg(3, '$stream_position'(752, 27, 0, 752), _352826)
   Exit: (268) [system] arg(3, '$stream_position'(752, 27, 0, 752), 0)
   Exit: (267) [$syspreds] stream_position_data(line_position, '$stream_position'(752, 27, 0, 752), 0)
   Call: (267) [$syspreds] stream_position_data(char_count, '$stream_position'(752, 27, 0, 752), _352828)
   Unify: (267) [$syspreds] stream_position_data(char_count, '$stream_position'(752, 27, 0, 752), _352828)
   Call: (268) [system] nonvar(char_count)
   Exit: (268) [system] nonvar(char_count)
   Call: (268) [$syspreds] stream_position_field(char_count, _385400)
   Unify: (268) [$syspreds] stream_position_field(char_count, 1)
   Exit: (268) [$syspreds] stream_position_field(char_count, 1)
   Call: (268) [system] arg(1, '$stream_position'(752, 27, 0, 752), _352828)
   Exit: (268) [system] arg(1, '$stream_position'(752, 27, 0, 752), 752)
   Exit: (267) [$syspreds] stream_position_data(char_count, '$stream_position'(752, 27, 0, 752), 752)
^  Exit: (266) [user] read_position((0x55aefe44e2f0), 27, 0, 752, '$stream_position'(752, 27, 0, 752))
^  Call: (266) [user] read_sexpr((0x55aefe44e2f0), _352842)
^  Unify: (266) [user] read_sexpr((0x55aefe44e2f0), _352842)
   Call: (267) [system] string((0x55aefe44e2f0))
^  Redo: (266) [user] read_sexpr((0x55aefe44e2f0), _352842)
^  Unify: (266) [user] read_sexpr((0x55aefe44e2f0), _352842)
^  Call: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), _352842)
^  Unify: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), _352842)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _400270)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (269) [system] '('=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', 'white')
^  Redo: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', end_of_line)
^  Redo: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', space)
^  Redo: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] get_char((0x55aefe44e2f0), _417054)
   Exit: (268) [system] get_char((0x55aefe44e2f0), '(')
   Call: (268) [system] '('='('
   Exit: (268) [system] '('='('
^  Call: (268) [user] read_list(')', (0x55aefe44e2f0), _352842)
^  Unify: (268) [user] read_list(')', (0x55aefe44e2f0), _352842)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _424480)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, 'white')
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, end_of_line)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, space)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, cntrl)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _441264)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)=')'
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _352842)
   Call: (269) [system] (:)=end_of_file
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _352842)
^  Call: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _446842)
^  Unify: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _446842)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _450556)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), :)
   Call: (271) [system] (:)=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(:)
^  Unify: (271) [user] is_like_space(:)
   Call: (272) [system] char_type(:, 'white')
^  Redo: (271) [user] is_like_space(:)
^  Unify: (271) [user] is_like_space(:)
   Call: (272) [system] char_type(:, end_of_line)
^  Redo: (271) [user] is_like_space(:)
^  Unify: (271) [user] is_like_space(:)
   Call: (272) [system] char_type(:, space)
^  Redo: (271) [user] is_like_space(:)
^  Unify: (271) [user] is_like_space(:)
   Call: (272) [system] char_type(:, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] get_char((0x55aefe44e2f0), _467340)
   Exit: (270) [system] get_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)='('
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _446842)
   Call: (270) [system] (:)='['
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _446842)
   Call: (270) [system] (:)='{'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _446842)
   Call: (270) [system] (:)='"'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _446842)
   Call: (270) [system] (:)=!
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _446842)
   Call: (270) [system] (:)='\''
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _446842)
   Call: (270) [system] (:)='`'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _446842)
   Call: (270) [system] (:)=end_of_file
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _446842)
^  Call: (270) [user] read_symbolic(')', (0x55aefe44e2f0), :, _446842)
^  Unify: (270) [user] read_symbolic(')', (0x55aefe44e2f0), :, _446842)
^  Call: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _485950)
^  Unify: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _485950)
   Call: (272) [system] peek_char((0x55aefe44e2f0), _487816)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (272) [user] is_delimiter(' ')
^  Unify: (272) [user] is_delimiter(' ')
   Call: (273) [system] char_type(' ', space)
   Exit: (273) [system] char_type(' ', space)
^  Exit: (272) [user] is_delimiter(' ')
   Call: (272) [system] _485950=[]
   Exit: (272) [system] []=[]
^  Exit: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (271) [user] classify_and_convert_charseq(:, [], _446842)
^  Unify: (271) [user] classify_and_convert_charseq(:, [], _446842)
^  Call: (273) [system] setup_call_cleanup('$notrace'(_498982, _498984), once(user:catch(read_from_chars([:], _446842), _498958, fail)), '$restore_trace'(_498982, _498984))
^  Unify: (273) [system] setup_call_cleanup(system:'$notrace'(_498982, _498984), system:once(user:catch(read_from_chars([:], _446842), _498958, fail)), system:'$restore_trace'(_498982, _498984))
^  Call: (274) [system] sig_atomic(system:'$notrace'(_498982, _498984))
^  Exit: (273) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([:], :), _498958, fail)), system:'$restore_trace'(3, -1))
   Call: (272) [system] atomic(:)
   Exit: (272) [system] atomic(:)
^  Exit: (271) [user] classify_and_convert_charseq(:, [], :)
^  Exit: (270) [user] read_symbolic(')', (0x55aefe44e2f0), :, :)
^  Exit: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), :)
^  Call: (269) [user] read_list(')', (0x55aefe44e2f0), _507420)
^  Unify: (269) [user] read_list(')', (0x55aefe44e2f0), _507420)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _511134)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (271) [system] ' '=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(' ')
^  Unify: (271) [user] is_like_space(' ')
   Call: (272) [system] char_type(' ', 'white')
   Exit: (272) [system] char_type(' ', 'white')
^  Exit: (271) [user] is_like_space(' ')
   Call: (271) [system] get_char((0x55aefe44e2f0), _519792)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _5990)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), i)
   Call: (272) [system] i=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, 'white')
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, end_of_line)
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, space)
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _23196)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), i)
   Call: (270) [system] i=')'
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _5984)
   Call: (270) [system] i=end_of_file
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _5984)
^  Call: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _28774)
^  Unify: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _28774)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _32488)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), i)
   Call: (272) [system] i=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, 'white')
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, end_of_line)
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, space)
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] get_char((0x55aefe44e2f0), _49272)
   Exit: (271) [system] get_char((0x55aefe44e2f0), i)
   Call: (271) [system] i='('
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _28774)
   Call: (271) [system] i='['
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _28774)
   Call: (271) [system] i='{'
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _28774)
   Call: (271) [system] i='"'
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _28774)
   Call: (271) [system] i=!
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _28774)
   Call: (271) [system] i='\''
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _28774)
   Call: (271) [system] i='`'
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _28774)
   Call: (271) [system] i=end_of_file
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _28774)
^  Call: (271) [user] read_symbolic(')', (0x55aefe44e2f0), i, _28774)
^  Unify: (271) [user] read_symbolic(')', (0x55aefe44e2f0), i, _28774)
^  Call: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _67882)
^  Unify: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _67882)
   Call: (273) [system] peek_char((0x55aefe44e2f0), _69748)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), f)
^  Call: (273) [user] is_delimiter(f)
^  Unify: (273) [user] is_delimiter(f)
   Call: (274) [system] char_type(f, space)
^  Redo: (273) [user] is_delimiter(f)
   Call: (274) [system] arg(_75388, v('(', ')', end_of_file), f)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _67882)
   Call: (273) [system] ')'==f
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _67882)
   Call: (273) [system] get_char((0x55aefe44e2f0), f)
   Exit: (273) [system] get_char((0x55aefe44e2f0), f)
   Call: (273) [system] f=(\)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _67882)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _82754)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _82754)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _84620)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), -)
^  Call: (274) [user] is_delimiter(-)
^  Unify: (274) [user] is_delimiter(-)
   Call: (275) [system] char_type(-, space)
^  Redo: (274) [user] is_delimiter(-)
   Call: (275) [system] arg(_90260, v('(', ')', end_of_file), -)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _82754)
   Call: (274) [system] ')'==(-)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _82754)
   Call: (274) [system] get_char((0x55aefe44e2f0), -)
   Exit: (274) [system] get_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _82754)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _97626)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _97626)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _99492)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), d)
^  Call: (275) [user] is_delimiter(d)
^  Unify: (275) [user] is_delimiter(d)
   Call: (276) [system] char_type(d, space)
^  Redo: (275) [user] is_delimiter(d)
   Call: (276) [system] arg(_105132, v('(', ')', end_of_file), d)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _97626)
   Call: (275) [system] ')'==d
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _97626)
   Call: (275) [system] get_char((0x55aefe44e2f0), d)
   Exit: (275) [system] get_char((0x55aefe44e2f0), d)
   Call: (275) [system] d=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _97626)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _112498)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _112498)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _114364)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (276) [user] is_delimiter(e)
^  Unify: (276) [user] is_delimiter(e)
   Call: (277) [system] char_type(e, space)
^  Redo: (276) [user] is_delimiter(e)
   Call: (277) [system] arg(_120004, v('(', ')', end_of_file), e)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _112498)
   Call: (276) [system] ')'==e
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _112498)
   Call: (276) [system] get_char((0x55aefe44e2f0), e)
   Exit: (276) [system] get_char((0x55aefe44e2f0), e)
   Call: (276) [system] e=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _112498)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _127370)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _127370)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _129236)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), c)
^  Call: (277) [user] is_delimiter(c)
^  Unify: (277) [user] is_delimiter(c)
   Call: (278) [system] char_type(c, space)
^  Redo: (277) [user] is_delimiter(c)
   Call: (278) [system] arg(_134876, v('(', ')', end_of_file), c)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _127370)
   Call: (277) [system] ')'==c
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _127370)
   Call: (277) [system] get_char((0x55aefe44e2f0), c)
   Exit: (277) [system] get_char((0x55aefe44e2f0), c)
   Call: (277) [system] c=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _127370)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _142242)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _142242)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _144108)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (278) [user] is_delimiter(o)
^  Unify: (278) [user] is_delimiter(o)
   Call: (279) [system] char_type(o, space)
^  Redo: (278) [user] is_delimiter(o)
   Call: (279) [system] arg(_149748, v('(', ')', end_of_file), o)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _142242)
   Call: (278) [system] ')'==o
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _142242)
   Call: (278) [system] get_char((0x55aefe44e2f0), o)
   Exit: (278) [system] get_char((0x55aefe44e2f0), o)
   Call: (278) [system] o=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _142242)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _157114)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _157114)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _158980)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (279) [user] is_delimiter(n)
^  Unify: (279) [user] is_delimiter(n)
   Call: (280) [system] char_type(n, space)
^  Redo: (279) [user] is_delimiter(n)
   Call: (280) [system] arg(_164620, v('(', ')', end_of_file), n)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _157114)
   Call: (279) [system] ')'==n
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _157114)
   Call: (279) [system] get_char((0x55aefe44e2f0), n)
   Exit: (279) [system] get_char((0x55aefe44e2f0), n)
   Call: (279) [system] n=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _157114)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _171986)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _171986)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _173852)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (280) [user] is_delimiter(s)
^  Unify: (280) [user] is_delimiter(s)
   Call: (281) [system] char_type(s, space)
^  Redo: (280) [user] is_delimiter(s)
   Call: (281) [system] arg(_179492, v('(', ')', end_of_file), s)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _171986)
   Call: (280) [system] ')'==s
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _171986)
   Call: (280) [system] get_char((0x55aefe44e2f0), s)
   Exit: (280) [system] get_char((0x55aefe44e2f0), s)
   Call: (280) [system] s=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _171986)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _186858)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _186858)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _188724)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), -)
^  Call: (281) [user] is_delimiter(-)
^  Unify: (281) [user] is_delimiter(-)
   Call: (282) [system] char_type(-, space)
^  Redo: (281) [user] is_delimiter(-)
   Call: (282) [system] arg(_194364, v('(', ')', end_of_file), -)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _186858)
   Call: (281) [system] ')'==(-)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _186858)
   Call: (281) [system] get_char((0x55aefe44e2f0), -)
   Exit: (281) [system] get_char((0x55aefe44e2f0), -)
   Call: (281) [system] (-)=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _186858)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _201730)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _201730)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _203596)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (282) [user] is_delimiter(e)
^  Unify: (282) [user] is_delimiter(e)
   Call: (283) [system] char_type(e, space)
^  Redo: (282) [user] is_delimiter(e)
   Call: (283) [system] arg(_209236, v('(', ')', end_of_file), e)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _201730)
   Call: (282) [system] ')'==e
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _201730)
   Call: (282) [system] get_char((0x55aefe44e2f0), e)
   Exit: (282) [system] get_char((0x55aefe44e2f0), e)
   Call: (282) [system] e=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _201730)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _216602)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _216602)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _218468)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), x)
^  Call: (283) [user] is_delimiter(x)
^  Unify: (283) [user] is_delimiter(x)
   Call: (284) [system] char_type(x, space)
^  Redo: (283) [user] is_delimiter(x)
   Call: (284) [system] arg(_224108, v('(', ')', end_of_file), x)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _216602)
   Call: (283) [system] ')'==x
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _216602)
   Call: (283) [system] get_char((0x55aefe44e2f0), x)
   Exit: (283) [system] get_char((0x55aefe44e2f0), x)
   Call: (283) [system] x=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _216602)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _231474)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _231474)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _233340)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (284) [user] is_delimiter(p)
^  Unify: (284) [user] is_delimiter(p)
   Call: (285) [system] char_type(p, space)
^  Redo: (284) [user] is_delimiter(p)
   Call: (285) [system] arg(_238980, v('(', ')', end_of_file), p)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _231474)
   Call: (284) [system] ')'==p
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _231474)
   Call: (284) [system] get_char((0x55aefe44e2f0), p)
   Exit: (284) [system] get_char((0x55aefe44e2f0), p)
   Call: (284) [system] p=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _231474)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _246346)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _246346)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _248212)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (285) [user] is_delimiter(r)
^  Unify: (285) [user] is_delimiter(r)
   Call: (286) [system] char_type(r, space)
^  Redo: (285) [user] is_delimiter(r)
   Call: (286) [system] arg(_253852, v('(', ')', end_of_file), r)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _246346)
   Call: (285) [system] ')'==r
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _246346)
   Call: (285) [system] get_char((0x55aefe44e2f0), r)
   Exit: (285) [system] get_char((0x55aefe44e2f0), r)
   Call: (285) [system] r=(\)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _246346)
^  Call: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _261218)
^  Unify: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _261218)
   Call: (286) [system] peek_char((0x55aefe44e2f0), _263084)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (286) [user] is_delimiter(' ')
^  Unify: (286) [user] is_delimiter(' ')
   Call: (287) [system] char_type(' ', space)
   Exit: (287) [system] char_type(' ', space)
^  Exit: (286) [user] is_delimiter(' ')
   Call: (286) [system] _261218=[]
   Exit: (286) [system] []=[]
^  Exit: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (285) [system] _246346=[r]
   Exit: (285) [system] [r]=[r]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r])
   Call: (284) [system] _231474=[p, r]
   Exit: (284) [system] [p, r]=[p, r]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, r])
   Call: (283) [system] _216602=[x, p, r]
   Exit: (283) [system] [x, p, r]=[x, p, r]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [x, p, r])
   Call: (282) [system] _201730=[e, x, p, r]
   Exit: (282) [system] [e, x, p, r]=[e, x, p, r]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, x, p, r])
   Call: (281) [system] _186858=[-, e, x, p, r]
   Exit: (281) [system] [-, e, x, p, r]=[-, e, x, p, r]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [-, e, x, p, r])
   Call: (280) [system] _171986=[s, -, e, x, p, r]
   Exit: (280) [system] [s, -, e, x, p, r]=[s, -, e, x, p, r]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, -, e, x, p, r])
   Call: (279) [system] _157114=[n, s, -, e, x, p, r]
   Exit: (279) [system] [n, s, -, e, x, p, r]=[n, s, -, e, x, p, r]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n, s, -, e, x, p, r])
   Call: (278) [system] _142242=[o, n, s, -, e, x, p, r]
   Exit: (278) [system] [o, n, s, -, e, x, p, r]=[o, n, s, -, e, x, p, r]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, n, s, -, e, x, p, r])
   Call: (277) [system] _127370=[c, o, n, s, -, e, x, p, r]
   Exit: (277) [system] [c, o, n, s, -, e, x, p, r]=[c, o, n, s, -, e, x, p, r]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [c, o, n, s, -, e, x, p, r])
   Call: (276) [system] _112498=[e, c, o, n, s, -, e, x, p, r]
   Exit: (276) [system] [e, c, o, n, s, -, e, x, p, r]=[e, c, o, n, s, -, e, x, p, r]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, c, o, n, s, -, e, x, p, r])
   Call: (275) [system] _97626=[d, e, c, o, n, s, -, e, x, p, r]
   Exit: (275) [system] [d, e, c, o, n, s, -, e, x, p, r]=[d, e, c, o, n, s, -, e, x, p, r]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [d, e, c, o, n, s, -, e, x, p, r])
   Call: (274) [system] _82754=[-, d, e, c, o, n, s, -, e, x, p, r]
   Exit: (274) [system] [-, d, e, c, o, n, s, -, e, x, p, r]=[-, d, e, c, o, n, s, -, e, x, p, r]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [-, d, e, c, o, n, s, -, e, x, p, r])
   Call: (273) [system] _67882=[f, -, d, e, c, o, n, s, -, e, x, p, r]
   Exit: (273) [system] [f, -, d, e, c, o, n, s, -, e, x, p, r]=[f, -, d, e, c, o, n, s, -, e, x, p, r]
^  Exit: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [f, -, d, e, c, o, n, s, -, e, x, p, r])
^  Call: (272) [user] classify_and_convert_charseq(i, [f, -, d, e, c, o, n, s, -, e, x, p, r], _28774)
^  Unify: (272) [user] classify_and_convert_charseq(i, [f, -, d, e, c, o, n, s, -, e, x, p, r], _28774)
^  Call: (274) [system] setup_call_cleanup('$notrace'(_310572, _310574), once(user:catch(read_from_chars([i, f, -, d, e, c, o, n, s, -, e, x, p, r], _28774), _310548, fail)), '$restore_trace'(_310572, _310574))
^  Unify: (274) [system] setup_call_cleanup(system:'$notrace'(_310572, _310574), system:once(user:catch(read_from_chars([i, f, -, d, e, c, o, n, s, -, e, x, p, r], _28774), _310548, fail)), system:'$restore_trace'(_310572, _310574))
^  Call: (275) [system] sig_atomic(system:'$notrace'(_310572, _310574))
^  Exit: (274) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([i, f, -, d, e, c, o, n, s, -, e, x, p, r], if-decons-expr), _310548, fail)), system:'$restore_trace'(3, -1))
   Call: (273) [system] atomic(if-decons-expr)
^  Redo: (272) [user] classify_and_convert_charseq(i, [f, -, d, e, c, o, n, s, -, e, x, p, r], _28774)
^  Unify: (272) [user] classify_and_convert_charseq(i, [f, -, d, e, c, o, n, s, -, e, x, p, r], _28774)
   Call: (273) [system] atom_chars(_28774, [i, f, -, d, e, c, o, n, s, -, e, x, p, r])
   Exit: (273) [system] atom_chars('if-decons-expr', [i, f, -, d, e, c, o, n, s, -, e, x, p, r])
^  Exit: (272) [user] classify_and_convert_charseq(i, [f, -, d, e, c, o, n, s, -, e, x, p, r], 'if-decons-expr')
^  Exit: (271) [user] read_symbolic(')', (0x55aefe44e2f0), i, 'if-decons-expr')
^  Exit: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), 'if-decons-expr')
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _321824)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _321824)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _325538)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (272) [system] ' '=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(' ')
^  Unify: (272) [user] is_like_space(' ')
   Call: (273) [system] char_type(' ', 'white')
   Exit: (273) [system] char_type(' ', 'white')
^  Exit: (272) [user] is_like_space(' ')
   Call: (272) [system] get_char((0x55aefe44e2f0), _334196)
   Exit: (272) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _337824)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (273) [system] '('=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', 'white')
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', end_of_line)
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', space)
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _355532)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('=')'
^  Redo: (270) [user] read_list(')', (0x55aefe44e2f0), _321824)
   Call: (271) [system] '('=end_of_file
^  Redo: (270) [user] read_list(')', (0x55aefe44e2f0), _321824)
^  Call: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _361110)
^  Unify: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _361110)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _364824)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (273) [system] '('=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', 'white')
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', end_of_line)
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', space)
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] get_char((0x55aefe44e2f0), _381608)
   Exit: (272) [system] get_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('='('
   Exit: (272) [system] '('='('
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _361110)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _361110)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _389034)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, 'white')
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, end_of_line)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, space)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _405818)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _361110)
   Call: (273) [system] (-)=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _361110)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _411396)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _411396)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _415110)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), -)
   Call: (275) [system] (-)=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(-)
^  Unify: (275) [user] is_like_space(-)
   Call: (276) [system] char_type(-, 'white')
^  Redo: (275) [user] is_like_space(-)
^  Unify: (275) [user] is_like_space(-)
   Call: (276) [system] char_type(-, end_of_line)
^  Redo: (275) [user] is_like_space(-)
^  Unify: (275) [user] is_like_space(-)
   Call: (276) [system] char_type(-, space)
^  Redo: (275) [user] is_like_space(-)
^  Unify: (275) [user] is_like_space(-)
   Call: (276) [system] char_type(-, cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _431894)
   Exit: (274) [system] get_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)='('
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _411396)
   Call: (274) [system] (-)='['
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _411396)
   Call: (274) [system] (-)='{'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _411396)
   Call: (274) [system] (-)='"'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _411396)
   Call: (274) [system] (-)=!
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _411396)
   Call: (274) [system] (-)='\''
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _411396)
   Call: (274) [system] (-)='`'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _411396)
   Call: (274) [system] (-)=end_of_file
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _411396)
^  Call: (274) [user] read_symbolic(')', (0x55aefe44e2f0), -, _411396)
^  Unify: (274) [user] read_symbolic(')', (0x55aefe44e2f0), -, _411396)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _450504)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _450504)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _452370)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), >)
^  Call: (276) [user] is_delimiter(>)
^  Unify: (276) [user] is_delimiter(>)
   Call: (277) [system] char_type(>, space)
^  Redo: (276) [user] is_delimiter(>)
   Call: (277) [system] arg(_458010, v('(', ')', end_of_file), >)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _450504)
   Call: (276) [system] ')'==(>)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _450504)
   Call: (276) [system] get_char((0x55aefe44e2f0), >)
   Exit: (276) [system] get_char((0x55aefe44e2f0), >)
   Call: (276) [system] (>)=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _450504)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _465376)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _465376)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _467242)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (277) [user] is_delimiter(' ')
^  Unify: (277) [user] is_delimiter(' ')
   Call: (278) [system] char_type(' ', space)
   Exit: (278) [system] char_type(' ', space)
^  Exit: (277) [user] is_delimiter(' ')
   Call: (277) [system] _465376=[]
   Exit: (277) [system] []=[]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (276) [system] _450504=[>]
   Exit: (276) [system] [>]=[>]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [>])
^  Call: (275) [user] classify_and_convert_charseq(-, [>], _411396)
^  Unify: (275) [user] classify_and_convert_charseq(-, [>], _411396)
^  Call: (277) [system] setup_call_cleanup('$notrace'(_481202, _481204), once(user:catch(read_from_chars([-, >], _411396), _481178, fail)), '$restore_trace'(_481202, _481204))
^  Unify: (277) [system] setup_call_cleanup(system:'$notrace'(_481202, _481204), system:once(user:catch(read_from_chars([-, >], _411396), _481178, fail)), system:'$restore_trace'(_481202, _481204))
^  Call: (278) [system] sig_atomic(system:'$notrace'(_481202, _481204))
^  Exit: (277) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([-, >], ->), _481178, fail)), system:'$restore_trace'(3, -1))
   Call: (276) [system] atomic(->)
   Exit: (276) [system] atomic(->)
^  Exit: (275) [user] classify_and_convert_charseq(-, [>], ->)
^  Exit: (274) [user] read_symbolic(')', (0x55aefe44e2f0), -, ->)
^  Exit: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), ->)
^  Call: (273) [user] read_list(')', (0x55aefe44e2f0), _489640)
^  Unify: (273) [user] read_list(')', (0x55aefe44e2f0), _489640)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _493354)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (275) [system] ' '=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(' ')
^  Unify: (275) [user] is_like_space(' ')
   Call: (276) [system] char_type(' ', 'white')
   Exit: (276) [system] char_type(' ', 'white')
^  Exit: (275) [user] is_like_space(' ')
   Call: (275) [system] get_char((0x55aefe44e2f0), _502012)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _505640)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (276) [system] 'E'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', 'white')
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', end_of_line)
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', space)
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _6006)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (274) [system] 'E'=')'
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _6002)
   Call: (274) [system] 'E'=end_of_file
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _6002)
^  Call: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _11006)
^  Unify: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _11006)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _14720)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (276) [system] 'E'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', 'white')
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', end_of_line)
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', space)
^  Redo: (276) [user] is_like_space('E')
^  Unify: (276) [user] is_like_space('E')
   Call: (277) [system] char_type('E', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] get_char((0x55aefe44e2f0), _31504)
   Exit: (275) [system] get_char((0x55aefe44e2f0), 'E')
   Call: (275) [system] 'E'='('
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _11006)
   Call: (275) [system] 'E'='['
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _11006)
   Call: (275) [system] 'E'='{'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _11006)
   Call: (275) [system] 'E'='"'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _11006)
   Call: (275) [system] 'E'=!
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _11006)
   Call: (275) [system] 'E'='\''
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _11006)
   Call: (275) [system] 'E'='`'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _11006)
   Call: (275) [system] 'E'=end_of_file
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _11006)
^  Call: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', _11006)
^  Unify: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', _11006)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _50114)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _50114)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _51980)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), x)
^  Call: (277) [user] is_delimiter(x)
^  Unify: (277) [user] is_delimiter(x)
   Call: (278) [system] char_type(x, space)
^  Redo: (277) [user] is_delimiter(x)
   Call: (278) [system] arg(_57620, v('(', ')', end_of_file), x)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _50114)
   Call: (277) [system] ')'==x
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _50114)
   Call: (277) [system] get_char((0x55aefe44e2f0), x)
   Exit: (277) [system] get_char((0x55aefe44e2f0), x)
   Call: (277) [system] x=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _50114)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _64986)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _64986)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _66852)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (278) [user] is_delimiter(p)
^  Unify: (278) [user] is_delimiter(p)
   Call: (279) [system] char_type(p, space)
^  Redo: (278) [user] is_delimiter(p)
   Call: (279) [system] arg(_72492, v('(', ')', end_of_file), p)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _64986)
   Call: (278) [system] ')'==p
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _64986)
   Call: (278) [system] get_char((0x55aefe44e2f0), p)
   Exit: (278) [system] get_char((0x55aefe44e2f0), p)
   Call: (278) [system] p=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _64986)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _79858)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _79858)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _81724)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (279) [user] is_delimiter(r)
^  Unify: (279) [user] is_delimiter(r)
   Call: (280) [system] char_type(r, space)
^  Redo: (279) [user] is_delimiter(r)
   Call: (280) [system] arg(_87364, v('(', ')', end_of_file), r)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _79858)
   Call: (279) [system] ')'==r
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _79858)
   Call: (279) [system] get_char((0x55aefe44e2f0), r)
   Exit: (279) [system] get_char((0x55aefe44e2f0), r)
   Call: (279) [system] r=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _79858)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _94730)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _94730)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _96596)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (280) [user] is_delimiter(e)
^  Unify: (280) [user] is_delimiter(e)
   Call: (281) [system] char_type(e, space)
^  Redo: (280) [user] is_delimiter(e)
   Call: (281) [system] arg(_102236, v('(', ')', end_of_file), e)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _94730)
   Call: (280) [system] ')'==e
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _94730)
   Call: (280) [system] get_char((0x55aefe44e2f0), e)
   Exit: (280) [system] get_char((0x55aefe44e2f0), e)
   Call: (280) [system] e=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _94730)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _109602)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _109602)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _111468)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (281) [user] is_delimiter(s)
^  Unify: (281) [user] is_delimiter(s)
   Call: (282) [system] char_type(s, space)
^  Redo: (281) [user] is_delimiter(s)
   Call: (282) [system] arg(_117108, v('(', ')', end_of_file), s)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _109602)
   Call: (281) [system] ')'==s
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _109602)
   Call: (281) [system] get_char((0x55aefe44e2f0), s)
   Exit: (281) [system] get_char((0x55aefe44e2f0), s)
   Call: (281) [system] s=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _109602)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _124474)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _124474)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _126340)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (282) [user] is_delimiter(s)
^  Unify: (282) [user] is_delimiter(s)
   Call: (283) [system] char_type(s, space)
^  Redo: (282) [user] is_delimiter(s)
   Call: (283) [system] arg(_131980, v('(', ')', end_of_file), s)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _124474)
   Call: (282) [system] ')'==s
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _124474)
   Call: (282) [system] get_char((0x55aefe44e2f0), s)
   Exit: (282) [system] get_char((0x55aefe44e2f0), s)
   Call: (282) [system] s=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _124474)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _139346)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _139346)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _141212)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (283) [user] is_delimiter(i)
^  Unify: (283) [user] is_delimiter(i)
   Call: (284) [system] char_type(i, space)
^  Redo: (283) [user] is_delimiter(i)
   Call: (284) [system] arg(_146852, v('(', ')', end_of_file), i)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _139346)
   Call: (283) [system] ')'==i
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _139346)
   Call: (283) [system] get_char((0x55aefe44e2f0), i)
   Exit: (283) [system] get_char((0x55aefe44e2f0), i)
   Call: (283) [system] i=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _139346)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _154218)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _154218)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _156084)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (284) [user] is_delimiter(o)
^  Unify: (284) [user] is_delimiter(o)
   Call: (285) [system] char_type(o, space)
^  Redo: (284) [user] is_delimiter(o)
   Call: (285) [system] arg(_161724, v('(', ')', end_of_file), o)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _154218)
   Call: (284) [system] ')'==o
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _154218)
   Call: (284) [system] get_char((0x55aefe44e2f0), o)
   Exit: (284) [system] get_char((0x55aefe44e2f0), o)
   Call: (284) [system] o=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _154218)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169090)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169090)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _170956)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (285) [user] is_delimiter(n)
^  Unify: (285) [user] is_delimiter(n)
   Call: (286) [system] char_type(n, space)
^  Redo: (285) [user] is_delimiter(n)
   Call: (286) [system] arg(_176596, v('(', ')', end_of_file), n)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169090)
   Call: (285) [system] ')'==n
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169090)
   Call: (285) [system] get_char((0x55aefe44e2f0), n)
   Exit: (285) [system] get_char((0x55aefe44e2f0), n)
   Call: (285) [system] n=(\)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169090)
^  Call: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _183962)
^  Unify: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _183962)
   Call: (286) [system] peek_char((0x55aefe44e2f0), _185828)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (286) [user] is_delimiter(' ')
^  Unify: (286) [user] is_delimiter(' ')
   Call: (287) [system] char_type(' ', space)
   Exit: (287) [system] char_type(' ', space)
^  Exit: (286) [user] is_delimiter(' ')
   Call: (286) [system] _183962=[]
   Exit: (286) [system] []=[]
^  Exit: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (285) [system] _169090=[n]
   Exit: (285) [system] [n]=[n]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (284) [system] _154218=[o, n]
   Exit: (284) [system] [o, n]=[o, n]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, n])
   Call: (283) [system] _139346=[i, o, n]
   Exit: (283) [system] [i, o, n]=[i, o, n]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, o, n])
   Call: (282) [system] _124474=[s, i, o, n]
   Exit: (282) [system] [s, i, o, n]=[s, i, o, n]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, i, o, n])
   Call: (281) [system] _109602=[s, s, i, o, n]
   Exit: (281) [system] [s, s, i, o, n]=[s, s, i, o, n]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, s, i, o, n])
   Call: (280) [system] _94730=[e, s, s, i, o, n]
   Exit: (280) [system] [e, s, s, i, o, n]=[e, s, s, i, o, n]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, s, s, i, o, n])
   Call: (279) [system] _79858=[r, e, s, s, i, o, n]
   Exit: (279) [system] [r, e, s, s, i, o, n]=[r, e, s, s, i, o, n]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, e, s, s, i, o, n])
   Call: (278) [system] _64986=[p, r, e, s, s, i, o, n]
   Exit: (278) [system] [p, r, e, s, s, i, o, n]=[p, r, e, s, s, i, o, n]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, r, e, s, s, i, o, n])
   Call: (277) [system] _50114=[x, p, r, e, s, s, i, o, n]
   Exit: (277) [system] [x, p, r, e, s, s, i, o, n]=[x, p, r, e, s, s, i, o, n]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [x, p, r, e, s, s, i, o, n])
^  Call: (276) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _11006)
^  Unify: (276) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _11006)
^  Call: (278) [system] setup_call_cleanup('$notrace'(_222140, _222142), once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _11006), _222116, fail)), '$restore_trace'(_222140, _222142))
^  Unify: (278) [system] setup_call_cleanup(system:'$notrace'(_222140, _222142), system:once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _11006), _222116, fail)), system:'$restore_trace'(_222140, _222142))
^  Call: (279) [system] sig_atomic(system:'$notrace'(_222140, _222142))
^  Exit: (278) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _11006), _222116, fail)), system:'$restore_trace'(3, -1))
   Call: (277) [system] atomic(_11006)
^  Redo: (276) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _11006)
^  Unify: (276) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _11006)
   Call: (277) [system] atom_chars(_11006, ['E', x, p, r, e, s, s, i, o, n])
   Exit: (277) [system] atom_chars('Expression', ['E', x, p, r, e, s, s, i, o, n])
^  Exit: (276) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], 'Expression')
^  Exit: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', 'Expression')
^  Exit: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Expression')
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _233394)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _233394)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _237108)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (276) [system] ' '=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(' ')
^  Unify: (276) [user] is_like_space(' ')
   Call: (277) [system] char_type(' ', 'white')
   Exit: (277) [system] char_type(' ', 'white')
^  Exit: (276) [user] is_like_space(' ')
   Call: (276) [system] get_char((0x55aefe44e2f0), _245766)
   Exit: (276) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _249394)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'V')
   Call: (277) [system] 'V'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space('V')
^  Unify: (277) [user] is_like_space('V')
   Call: (278) [system] char_type('V', 'white')
^  Redo: (277) [user] is_like_space('V')
^  Unify: (277) [user] is_like_space('V')
   Call: (278) [system] char_type('V', end_of_line)
^  Redo: (277) [user] is_like_space('V')
^  Unify: (277) [user] is_like_space('V')
   Call: (278) [system] char_type('V', space)
^  Redo: (277) [user] is_like_space('V')
^  Unify: (277) [user] is_like_space('V')
   Call: (278) [system] char_type('V', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _267102)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'V')
   Call: (275) [system] 'V'=')'
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _233394)
   Call: (275) [system] 'V'=end_of_file
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _233394)
^  Call: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _272680)
^  Unify: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _272680)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _276394)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'V')
   Call: (277) [system] 'V'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space('V')
^  Unify: (277) [user] is_like_space('V')
   Call: (278) [system] char_type('V', 'white')
^  Redo: (277) [user] is_like_space('V')
^  Unify: (277) [user] is_like_space('V')
   Call: (278) [system] char_type('V', end_of_line)
^  Redo: (277) [user] is_like_space('V')
^  Unify: (277) [user] is_like_space('V')
   Call: (278) [system] char_type('V', space)
^  Redo: (277) [user] is_like_space('V')
^  Unify: (277) [user] is_like_space('V')
   Call: (278) [system] char_type('V', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] get_char((0x55aefe44e2f0), _293178)
   Exit: (276) [system] get_char((0x55aefe44e2f0), 'V')
   Call: (276) [system] 'V'='('
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _272680)
   Call: (276) [system] 'V'='['
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _272680)
   Call: (276) [system] 'V'='{'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _272680)
   Call: (276) [system] 'V'='"'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _272680)
   Call: (276) [system] 'V'=!
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _272680)
   Call: (276) [system] 'V'='\''
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _272680)
   Call: (276) [system] 'V'='`'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _272680)
   Call: (276) [system] 'V'=end_of_file
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _272680)
^  Call: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'V', _272680)
^  Unify: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'V', _272680)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _311788)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _311788)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _313654)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (278) [user] is_delimiter(a)
^  Unify: (278) [user] is_delimiter(a)
   Call: (279) [system] char_type(a, space)
^  Redo: (278) [user] is_delimiter(a)
   Call: (279) [system] arg(_319294, v('(', ')', end_of_file), a)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _311788)
   Call: (278) [system] ')'==a
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _311788)
   Call: (278) [system] get_char((0x55aefe44e2f0), a)
   Exit: (278) [system] get_char((0x55aefe44e2f0), a)
   Call: (278) [system] a=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _311788)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _326660)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _326660)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _328526)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (279) [user] is_delimiter(r)
^  Unify: (279) [user] is_delimiter(r)
   Call: (280) [system] char_type(r, space)
^  Redo: (279) [user] is_delimiter(r)
   Call: (280) [system] arg(_334166, v('(', ')', end_of_file), r)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _326660)
   Call: (279) [system] ')'==r
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _326660)
   Call: (279) [system] get_char((0x55aefe44e2f0), r)
   Exit: (279) [system] get_char((0x55aefe44e2f0), r)
   Call: (279) [system] r=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _326660)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _341532)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _341532)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _343398)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (280) [user] is_delimiter(i)
^  Unify: (280) [user] is_delimiter(i)
   Call: (281) [system] char_type(i, space)
^  Redo: (280) [user] is_delimiter(i)
   Call: (281) [system] arg(_349038, v('(', ')', end_of_file), i)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _341532)
   Call: (280) [system] ')'==i
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _341532)
   Call: (280) [system] get_char((0x55aefe44e2f0), i)
   Exit: (280) [system] get_char((0x55aefe44e2f0), i)
   Call: (280) [system] i=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _341532)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _356404)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _356404)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _358270)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (281) [user] is_delimiter(a)
^  Unify: (281) [user] is_delimiter(a)
   Call: (282) [system] char_type(a, space)
^  Redo: (281) [user] is_delimiter(a)
   Call: (282) [system] arg(_363910, v('(', ')', end_of_file), a)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _356404)
   Call: (281) [system] ')'==a
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _356404)
   Call: (281) [system] get_char((0x55aefe44e2f0), a)
   Exit: (281) [system] get_char((0x55aefe44e2f0), a)
   Call: (281) [system] a=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _356404)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _371276)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _371276)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _373142)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), b)
^  Call: (282) [user] is_delimiter(b)
^  Unify: (282) [user] is_delimiter(b)
   Call: (283) [system] char_type(b, space)
^  Redo: (282) [user] is_delimiter(b)
   Call: (283) [system] arg(_378782, v('(', ')', end_of_file), b)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _371276)
   Call: (282) [system] ')'==b
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _371276)
   Call: (282) [system] get_char((0x55aefe44e2f0), b)
   Exit: (282) [system] get_char((0x55aefe44e2f0), b)
   Call: (282) [system] b=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _371276)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _386148)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _386148)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _388014)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (283) [user] is_delimiter(l)
^  Unify: (283) [user] is_delimiter(l)
   Call: (284) [system] char_type(l, space)
^  Redo: (283) [user] is_delimiter(l)
   Call: (284) [system] arg(_393654, v('(', ')', end_of_file), l)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _386148)
   Call: (283) [system] ')'==l
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _386148)
   Call: (283) [system] get_char((0x55aefe44e2f0), l)
   Exit: (283) [system] get_char((0x55aefe44e2f0), l)
   Call: (283) [system] l=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _386148)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _401020)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _401020)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _402886)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (284) [user] is_delimiter(e)
^  Unify: (284) [user] is_delimiter(e)
   Call: (285) [system] char_type(e, space)
^  Redo: (284) [user] is_delimiter(e)
   Call: (285) [system] arg(_408526, v('(', ')', end_of_file), e)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _401020)
   Call: (284) [system] ')'==e
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _401020)
   Call: (284) [system] get_char((0x55aefe44e2f0), e)
   Exit: (284) [system] get_char((0x55aefe44e2f0), e)
   Call: (284) [system] e=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _401020)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _415892)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _415892)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _417758)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (285) [user] is_delimiter(' ')
^  Unify: (285) [user] is_delimiter(' ')
   Call: (286) [system] char_type(' ', space)
   Exit: (286) [system] char_type(' ', space)
^  Exit: (285) [user] is_delimiter(' ')
   Call: (285) [system] _415892=[]
   Exit: (285) [system] []=[]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (284) [system] _401020=[e]
   Exit: (284) [system] [e]=[e]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e])
   Call: (283) [system] _386148=[l, e]
   Exit: (283) [system] [l, e]=[l, e]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l, e])
   Call: (282) [system] _371276=[b, l, e]
   Exit: (282) [system] [b, l, e]=[b, l, e]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [b, l, e])
   Call: (281) [system] _356404=[a, b, l, e]
   Exit: (281) [system] [a, b, l, e]=[a, b, l, e]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, b, l, e])
   Call: (280) [system] _341532=[i, a, b, l, e]
   Exit: (280) [system] [i, a, b, l, e]=[i, a, b, l, e]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, a, b, l, e])
   Call: (279) [system] _326660=[r, i, a, b, l, e]
   Exit: (279) [system] [r, i, a, b, l, e]=[r, i, a, b, l, e]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, i, a, b, l, e])
   Call: (278) [system] _311788=[a, r, i, a, b, l, e]
   Exit: (278) [system] [a, r, i, a, b, l, e]=[a, r, i, a, b, l, e]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, r, i, a, b, l, e])
^  Call: (277) [user] classify_and_convert_charseq('V', [a, r, i, a, b, l, e], _272680)
^  Unify: (277) [user] classify_and_convert_charseq('V', [a, r, i, a, b, l, e], _272680)
^  Call: (279) [system] setup_call_cleanup('$notrace'(_448482, _448484), once(user:catch(read_from_chars(['V', a, r, i, a, b, l, e], _272680), _448458, fail)), '$restore_trace'(_448482, _448484))
^  Unify: (279) [system] setup_call_cleanup(system:'$notrace'(_448482, _448484), system:once(user:catch(read_from_chars(['V', a, r, i, a, b, l, e], _272680), _448458, fail)), system:'$restore_trace'(_448482, _448484))
^  Call: (280) [system] sig_atomic(system:'$notrace'(_448482, _448484))
^  Exit: (279) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['V', a, r, i, a, b, l, e], _272680), _448458, fail)), system:'$restore_trace'(3, -1))
   Call: (278) [system] atomic(_272680)
^  Redo: (277) [user] classify_and_convert_charseq('V', [a, r, i, a, b, l, e], _272680)
^  Unify: (277) [user] classify_and_convert_charseq('V', [a, r, i, a, b, l, e], _272680)
   Call: (278) [system] atom_chars(_272680, ['V', a, r, i, a, b, l, e])
   Exit: (278) [system] atom_chars('Variable', ['V', a, r, i, a, b, l, e])
^  Exit: (277) [user] classify_and_convert_charseq('V', [a, r, i, a, b, l, e], 'Variable')
^  Exit: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'V', 'Variable')
^  Exit: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Variable')
^  Call: (275) [user] read_list(')', (0x55aefe44e2f0), _459736)
^  Unify: (275) [user] read_list(')', (0x55aefe44e2f0), _459736)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _463450)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (277) [system] ' '=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space(' ')
^  Unify: (277) [user] is_like_space(' ')
   Call: (278) [system] char_type(' ', 'white')
   Exit: (278) [system] char_type(' ', 'white')
^  Exit: (277) [user] is_like_space(' ')
   Call: (277) [system] get_char((0x55aefe44e2f0), _472108)
   Exit: (277) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _475736)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), 'V')
   Call: (278) [system] 'V'=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space('V')
^  Unify: (278) [user] is_like_space('V')
   Call: (279) [system] char_type('V', 'white')
^  Redo: (278) [user] is_like_space('V')
^  Unify: (278) [user] is_like_space('V')
   Call: (279) [system] char_type('V', end_of_line)
^  Redo: (278) [user] is_like_space('V')
^  Unify: (278) [user] is_like_space('V')
   Call: (279) [system] char_type('V', space)
^  Redo: (278) [user] is_like_space('V')
^  Unify: (278) [user] is_like_space('V')
   Call: (279) [system] char_type('V', cntrl)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _493444)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'V')
   Call: (276) [system] 'V'=')'
^  Redo: (275) [user] read_list(')', (0x55aefe44e2f0), _459736)
   Call: (276) [system] 'V'=end_of_file
^  Redo: (275) [user] read_list(')', (0x55aefe44e2f0), _459736)
^  Call: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _499022)
^  Unify: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _499022)
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _502736)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), 'V')
   Call: (278) [system] 'V'=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space('V')
^  Unify: (278) [user] is_like_space('V')
   Call: (279) [system] char_type('V', 'white')
^  Redo: (278) [user] is_like_space('V')
^  Unify: (278) [user] is_like_space('V')
   Call: (279) [system] char_type('V', end_of_line)
^  Redo: (278) [user] is_like_space('V')
^  Unify: (278) [user] is_like_space('V')
   Call: (279) [system] char_type('V', space)
^  Redo: (278) [user] is_like_space('V')
^  Unify: (278) [user] is_like_space('V')
   Call: (279) [system] char_type('V', cntrl)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] get_char((0x55aefe44e2f0), _519520)
   Exit: (277) [system] get_char((0x55aefe44e2f0), 'V')
   Call: (277) [system] 'V'='('
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _499022)
   Call: (277) [system] 'V'='['
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _6018)
   Call: (277) [system] 'V'='{'
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _6018)
   Call: (277) [system] 'V'='"'
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _6018)
   Call: (277) [system] 'V'=!
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _6018)
   Call: (277) [system] 'V'='\''
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _6018)
   Call: (277) [system] 'V'='`'
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _6018)
   Call: (277) [system] 'V'=end_of_file
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _6018)
^  Call: (277) [user] read_symbolic(')', (0x55aefe44e2f0), 'V', _6018)
^  Unify: (277) [user] read_symbolic(')', (0x55aefe44e2f0), 'V', _6018)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _20338)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _20338)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _22204)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (279) [user] is_delimiter(a)
^  Unify: (279) [user] is_delimiter(a)
   Call: (280) [system] char_type(a, space)
^  Redo: (279) [user] is_delimiter(a)
   Call: (280) [system] arg(_27844, v('(', ')', end_of_file), a)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _20338)
   Call: (279) [system] ')'==a
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _20338)
   Call: (279) [system] get_char((0x55aefe44e2f0), a)
   Exit: (279) [system] get_char((0x55aefe44e2f0), a)
   Call: (279) [system] a=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _20338)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _35210)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _35210)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _37076)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (280) [user] is_delimiter(r)
^  Unify: (280) [user] is_delimiter(r)
   Call: (281) [system] char_type(r, space)
^  Redo: (280) [user] is_delimiter(r)
   Call: (281) [system] arg(_42716, v('(', ')', end_of_file), r)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _35210)
   Call: (280) [system] ')'==r
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _35210)
   Call: (280) [system] get_char((0x55aefe44e2f0), r)
   Exit: (280) [system] get_char((0x55aefe44e2f0), r)
   Call: (280) [system] r=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _35210)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _50082)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _50082)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _51948)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (281) [user] is_delimiter(i)
^  Unify: (281) [user] is_delimiter(i)
   Call: (282) [system] char_type(i, space)
^  Redo: (281) [user] is_delimiter(i)
   Call: (282) [system] arg(_57588, v('(', ')', end_of_file), i)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _50082)
   Call: (281) [system] ')'==i
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _50082)
   Call: (281) [system] get_char((0x55aefe44e2f0), i)
   Exit: (281) [system] get_char((0x55aefe44e2f0), i)
   Call: (281) [system] i=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _50082)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _64954)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _64954)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _66820)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (282) [user] is_delimiter(a)
^  Unify: (282) [user] is_delimiter(a)
   Call: (283) [system] char_type(a, space)
^  Redo: (282) [user] is_delimiter(a)
   Call: (283) [system] arg(_72460, v('(', ')', end_of_file), a)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _64954)
   Call: (282) [system] ')'==a
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _64954)
   Call: (282) [system] get_char((0x55aefe44e2f0), a)
   Exit: (282) [system] get_char((0x55aefe44e2f0), a)
   Call: (282) [system] a=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _64954)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _79826)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _79826)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _81692)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), b)
^  Call: (283) [user] is_delimiter(b)
^  Unify: (283) [user] is_delimiter(b)
   Call: (284) [system] char_type(b, space)
^  Redo: (283) [user] is_delimiter(b)
   Call: (284) [system] arg(_87332, v('(', ')', end_of_file), b)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _79826)
   Call: (283) [system] ')'==b
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _79826)
   Call: (283) [system] get_char((0x55aefe44e2f0), b)
   Exit: (283) [system] get_char((0x55aefe44e2f0), b)
   Call: (283) [system] b=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _79826)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _94698)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _94698)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _96564)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (284) [user] is_delimiter(l)
^  Unify: (284) [user] is_delimiter(l)
   Call: (285) [system] char_type(l, space)
^  Redo: (284) [user] is_delimiter(l)
   Call: (285) [system] arg(_102204, v('(', ')', end_of_file), l)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _94698)
   Call: (284) [system] ')'==l
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _94698)
   Call: (284) [system] get_char((0x55aefe44e2f0), l)
   Exit: (284) [system] get_char((0x55aefe44e2f0), l)
   Call: (284) [system] l=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _94698)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _109570)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _109570)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _111436)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (285) [user] is_delimiter(e)
^  Unify: (285) [user] is_delimiter(e)
   Call: (286) [system] char_type(e, space)
^  Redo: (285) [user] is_delimiter(e)
   Call: (286) [system] arg(_117076, v('(', ')', end_of_file), e)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _109570)
   Call: (285) [system] ')'==e
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _109570)
   Call: (285) [system] get_char((0x55aefe44e2f0), e)
   Exit: (285) [system] get_char((0x55aefe44e2f0), e)
   Call: (285) [system] e=(\)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _109570)
^  Call: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _124442)
^  Unify: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _124442)
   Call: (286) [system] peek_char((0x55aefe44e2f0), _126308)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (286) [user] is_delimiter(' ')
^  Unify: (286) [user] is_delimiter(' ')
   Call: (287) [system] char_type(' ', space)
   Exit: (287) [system] char_type(' ', space)
^  Exit: (286) [user] is_delimiter(' ')
   Call: (286) [system] _124442=[]
   Exit: (286) [system] []=[]
^  Exit: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (285) [system] _109570=[e]
   Exit: (285) [system] [e]=[e]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e])
   Call: (284) [system] _94698=[l, e]
   Exit: (284) [system] [l, e]=[l, e]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l, e])
   Call: (283) [system] _79826=[b, l, e]
   Exit: (283) [system] [b, l, e]=[b, l, e]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [b, l, e])
   Call: (282) [system] _64954=[a, b, l, e]
   Exit: (282) [system] [a, b, l, e]=[a, b, l, e]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, b, l, e])
   Call: (281) [system] _50082=[i, a, b, l, e]
   Exit: (281) [system] [i, a, b, l, e]=[i, a, b, l, e]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, a, b, l, e])
   Call: (280) [system] _35210=[r, i, a, b, l, e]
   Exit: (280) [system] [r, i, a, b, l, e]=[r, i, a, b, l, e]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, i, a, b, l, e])
   Call: (279) [system] _20338=[a, r, i, a, b, l, e]
   Exit: (279) [system] [a, r, i, a, b, l, e]=[a, r, i, a, b, l, e]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, r, i, a, b, l, e])
^  Call: (278) [user] classify_and_convert_charseq('V', [a, r, i, a, b, l, e], _6018)
^  Unify: (278) [user] classify_and_convert_charseq('V', [a, r, i, a, b, l, e], _6018)
^  Call: (280) [system] setup_call_cleanup('$notrace'(_157032, _157034), once(user:catch(read_from_chars(['V', a, r, i, a, b, l, e], _6018), _157008, fail)), '$restore_trace'(_157032, _157034))
^  Unify: (280) [system] setup_call_cleanup(system:'$notrace'(_157032, _157034), system:once(user:catch(read_from_chars(['V', a, r, i, a, b, l, e], _6018), _157008, fail)), system:'$restore_trace'(_157032, _157034))
^  Call: (281) [system] sig_atomic(system:'$notrace'(_157032, _157034))
^  Exit: (280) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['V', a, r, i, a, b, l, e], _6018), _157008, fail)), system:'$restore_trace'(3, -1))
   Call: (279) [system] atomic(_6018)
^  Redo: (278) [user] classify_and_convert_charseq('V', [a, r, i, a, b, l, e], _6018)
^  Unify: (278) [user] classify_and_convert_charseq('V', [a, r, i, a, b, l, e], _6018)
   Call: (279) [system] atom_chars(_6018, ['V', a, r, i, a, b, l, e])
   Exit: (279) [system] atom_chars('Variable', ['V', a, r, i, a, b, l, e])
^  Exit: (278) [user] classify_and_convert_charseq('V', [a, r, i, a, b, l, e], 'Variable')
^  Exit: (277) [user] read_symbolic(')', (0x55aefe44e2f0), 'V', 'Variable')
^  Exit: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Variable')
^  Call: (276) [user] read_list(')', (0x55aefe44e2f0), _168286)
^  Unify: (276) [user] read_list(')', (0x55aefe44e2f0), _168286)
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _172000)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (278) [system] ' '=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space(' ')
^  Unify: (278) [user] is_like_space(' ')
   Call: (279) [system] char_type(' ', 'white')
   Exit: (279) [system] char_type(' ', 'white')
^  Exit: (278) [user] is_like_space(' ')
   Call: (278) [system] get_char((0x55aefe44e2f0), _180658)
   Exit: (278) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _184286)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (279) [system] 'A'=(;)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', 'white')
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', end_of_line)
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', space)
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', cntrl)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _201994)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (277) [system] 'A'=')'
^  Redo: (276) [user] read_list(')', (0x55aefe44e2f0), _168286)
   Call: (277) [system] 'A'=end_of_file
^  Redo: (276) [user] read_list(')', (0x55aefe44e2f0), _168286)
^  Call: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _207572)
^  Unify: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _207572)
^  Call: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _211286)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (279) [system] 'A'=(;)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', 'white')
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', end_of_line)
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', space)
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', cntrl)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] get_char((0x55aefe44e2f0), _228070)
   Exit: (278) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (278) [system] 'A'='('
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _207572)
   Call: (278) [system] 'A'='['
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _207572)
   Call: (278) [system] 'A'='{'
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _207572)
   Call: (278) [system] 'A'='"'
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _207572)
   Call: (278) [system] 'A'=!
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _207572)
   Call: (278) [system] 'A'='\''
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _207572)
   Call: (278) [system] 'A'='`'
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _207572)
   Call: (278) [system] 'A'=end_of_file
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _207572)
^  Call: (278) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _207572)
^  Unify: (278) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _207572)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _246680)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _246680)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _248546)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (280) [user] is_delimiter(t)
^  Unify: (280) [user] is_delimiter(t)
   Call: (281) [system] char_type(t, space)
^  Redo: (280) [user] is_delimiter(t)
   Call: (281) [system] arg(_254186, v('(', ')', end_of_file), t)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _246680)
   Call: (280) [system] ')'==t
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _246680)
   Call: (280) [system] get_char((0x55aefe44e2f0), t)
   Exit: (280) [system] get_char((0x55aefe44e2f0), t)
   Call: (280) [system] t=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _246680)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _261552)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _261552)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _263418)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (281) [user] is_delimiter(o)
^  Unify: (281) [user] is_delimiter(o)
   Call: (282) [system] char_type(o, space)
^  Redo: (281) [user] is_delimiter(o)
   Call: (282) [system] arg(_269058, v('(', ')', end_of_file), o)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _261552)
   Call: (281) [system] ')'==o
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _261552)
   Call: (281) [system] get_char((0x55aefe44e2f0), o)
   Exit: (281) [system] get_char((0x55aefe44e2f0), o)
   Call: (281) [system] o=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _261552)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _276424)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _276424)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _278290)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (282) [user] is_delimiter(m)
^  Unify: (282) [user] is_delimiter(m)
   Call: (283) [system] char_type(m, space)
^  Redo: (282) [user] is_delimiter(m)
   Call: (283) [system] arg(_283930, v('(', ')', end_of_file), m)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _276424)
   Call: (282) [system] ')'==m
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _276424)
   Call: (282) [system] get_char((0x55aefe44e2f0), m)
   Exit: (282) [system] get_char((0x55aefe44e2f0), m)
   Call: (282) [system] m=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _276424)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _291296)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _291296)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _293162)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (283) [user] is_delimiter(' ')
^  Unify: (283) [user] is_delimiter(' ')
   Call: (284) [system] char_type(' ', space)
   Exit: (284) [system] char_type(' ', space)
^  Exit: (283) [user] is_delimiter(' ')
   Call: (283) [system] _291296=[]
   Exit: (283) [system] []=[]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (282) [system] _276424=[m]
   Exit: (282) [system] [m]=[m]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (281) [system] _261552=[o, m]
   Exit: (281) [system] [o, m]=[o, m]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (280) [system] _246680=[t, o, m]
   Exit: (280) [system] [t, o, m]=[t, o, m]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (279) [user] classify_and_convert_charseq('A', [t, o, m], _207572)
^  Unify: (279) [user] classify_and_convert_charseq('A', [t, o, m], _207572)
^  Call: (281) [system] setup_call_cleanup('$notrace'(_312710, _312712), once(user:catch(read_from_chars(['A', t, o, m], _207572), _312686, fail)), '$restore_trace'(_312710, _312712))
^  Unify: (281) [system] setup_call_cleanup(system:'$notrace'(_312710, _312712), system:once(user:catch(read_from_chars(['A', t, o, m], _207572), _312686, fail)), system:'$restore_trace'(_312710, _312712))
^  Call: (282) [system] sig_atomic(system:'$notrace'(_312710, _312712))
^  Exit: (281) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _207572), _312686, fail)), system:'$restore_trace'(3, -1))
   Call: (280) [system] atomic(_207572)
^  Redo: (279) [user] classify_and_convert_charseq('A', [t, o, m], _207572)
^  Unify: (279) [user] classify_and_convert_charseq('A', [t, o, m], _207572)
   Call: (280) [system] atom_chars(_207572, ['A', t, o, m])
   Exit: (280) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (279) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (278) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (277) [user] read_list(')', (0x55aefe44e2f0), _323964)
^  Unify: (277) [user] read_list(')', (0x55aefe44e2f0), _323964)
^  Call: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _327678)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (279) [system] ' '=(;)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (279) [user] is_like_space(' ')
^  Unify: (279) [user] is_like_space(' ')
   Call: (280) [system] char_type(' ', 'white')
   Exit: (280) [system] char_type(' ', 'white')
^  Exit: (279) [user] is_like_space(' ')
   Call: (279) [system] get_char((0x55aefe44e2f0), _336336)
   Exit: (279) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] peek_char((0x55aefe44e2f0), _339964)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (280) [system] 'A'=(;)
^  Redo: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (280) [user] is_like_space('A')
^  Unify: (280) [user] is_like_space('A')
   Call: (281) [system] char_type('A', 'white')
^  Redo: (280) [user] is_like_space('A')
^  Unify: (280) [user] is_like_space('A')
   Call: (281) [system] char_type('A', end_of_line)
^  Redo: (280) [user] is_like_space('A')
^  Unify: (280) [user] is_like_space('A')
   Call: (281) [system] char_type('A', space)
^  Redo: (280) [user] is_like_space('A')
^  Unify: (280) [user] is_like_space('A')
   Call: (281) [system] char_type('A', cntrl)
^  Redo: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _357672)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (278) [system] 'A'=')'
^  Redo: (277) [user] read_list(')', (0x55aefe44e2f0), _323964)
   Call: (278) [system] 'A'=end_of_file
^  Redo: (277) [user] read_list(')', (0x55aefe44e2f0), _323964)
^  Call: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _363250)
^  Unify: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _363250)
^  Call: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] peek_char((0x55aefe44e2f0), _366964)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (280) [system] 'A'=(;)
^  Redo: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (280) [user] is_like_space('A')
^  Unify: (280) [user] is_like_space('A')
   Call: (281) [system] char_type('A', 'white')
^  Redo: (280) [user] is_like_space('A')
^  Unify: (280) [user] is_like_space('A')
   Call: (281) [system] char_type('A', end_of_line)
^  Redo: (280) [user] is_like_space('A')
^  Unify: (280) [user] is_like_space('A')
   Call: (281) [system] char_type('A', space)
^  Redo: (280) [user] is_like_space('A')
^  Unify: (280) [user] is_like_space('A')
   Call: (281) [system] char_type('A', cntrl)
^  Redo: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] get_char((0x55aefe44e2f0), _383748)
   Exit: (279) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (279) [system] 'A'='('
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _363250)
   Call: (279) [system] 'A'='['
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _363250)
   Call: (279) [system] 'A'='{'
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _363250)
   Call: (279) [system] 'A'='"'
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _363250)
   Call: (279) [system] 'A'=!
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _363250)
   Call: (279) [system] 'A'='\''
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _363250)
   Call: (279) [system] 'A'='`'
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _363250)
   Call: (279) [system] 'A'=end_of_file
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _363250)
^  Call: (279) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _363250)
^  Unify: (279) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _363250)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _402358)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _402358)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _404224)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (281) [user] is_delimiter(t)
^  Unify: (281) [user] is_delimiter(t)
   Call: (282) [system] char_type(t, space)
^  Redo: (281) [user] is_delimiter(t)
   Call: (282) [system] arg(_409864, v('(', ')', end_of_file), t)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _402358)
   Call: (281) [system] ')'==t
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _402358)
   Call: (281) [system] get_char((0x55aefe44e2f0), t)
   Exit: (281) [system] get_char((0x55aefe44e2f0), t)
   Call: (281) [system] t=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _402358)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _417230)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _417230)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _419096)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (282) [user] is_delimiter(o)
^  Unify: (282) [user] is_delimiter(o)
   Call: (283) [system] char_type(o, space)
^  Redo: (282) [user] is_delimiter(o)
   Call: (283) [system] arg(_424736, v('(', ')', end_of_file), o)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _417230)
   Call: (282) [system] ')'==o
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _417230)
   Call: (282) [system] get_char((0x55aefe44e2f0), o)
   Exit: (282) [system] get_char((0x55aefe44e2f0), o)
   Call: (282) [system] o=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _417230)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _432102)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _432102)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _433968)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (283) [user] is_delimiter(m)
^  Unify: (283) [user] is_delimiter(m)
   Call: (284) [system] char_type(m, space)
^  Redo: (283) [user] is_delimiter(m)
   Call: (284) [system] arg(_439608, v('(', ')', end_of_file), m)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _432102)
   Call: (283) [system] ')'==m
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _432102)
   Call: (283) [system] get_char((0x55aefe44e2f0), m)
   Exit: (283) [system] get_char((0x55aefe44e2f0), m)
   Call: (283) [system] m=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _432102)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _446974)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _446974)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _448840)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (284) [user] is_delimiter(' ')
^  Unify: (284) [user] is_delimiter(' ')
   Call: (285) [system] char_type(' ', space)
   Exit: (285) [system] char_type(' ', space)
^  Exit: (284) [user] is_delimiter(' ')
   Call: (284) [system] _446974=[]
   Exit: (284) [system] []=[]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (283) [system] _432102=[m]
   Exit: (283) [system] [m]=[m]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (282) [system] _417230=[o, m]
   Exit: (282) [system] [o, m]=[o, m]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (281) [system] _402358=[t, o, m]
   Exit: (281) [system] [t, o, m]=[t, o, m]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (280) [user] classify_and_convert_charseq('A', [t, o, m], _363250)
^  Unify: (280) [user] classify_and_convert_charseq('A', [t, o, m], _363250)
^  Call: (282) [system] setup_call_cleanup('$notrace'(_468388, _468390), once(user:catch(read_from_chars(['A', t, o, m], _363250), _468364, fail)), '$restore_trace'(_468388, _468390))
^  Unify: (282) [system] setup_call_cleanup(system:'$notrace'(_468388, _468390), system:once(user:catch(read_from_chars(['A', t, o, m], _363250), _468364, fail)), system:'$restore_trace'(_468388, _468390))
^  Call: (283) [system] sig_atomic(system:'$notrace'(_468388, _468390))
^  Exit: (282) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _363250), _468364, fail)), system:'$restore_trace'(3, -1))
   Call: (281) [system] atomic(_363250)
^  Redo: (280) [user] classify_and_convert_charseq('A', [t, o, m], _363250)
^  Unify: (280) [user] classify_and_convert_charseq('A', [t, o, m], _363250)
   Call: (281) [system] atom_chars(_363250, ['A', t, o, m])
   Exit: (281) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (280) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (279) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (278) [user] read_list(')', (0x55aefe44e2f0), _479642)
^  Unify: (278) [user] read_list(')', (0x55aefe44e2f0), _479642)
^  Call: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] peek_char((0x55aefe44e2f0), _483356)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (280) [system] ' '=(;)
^  Redo: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (280) [user] is_like_space(' ')
^  Unify: (280) [user] is_like_space(' ')
   Call: (281) [system] char_type(' ', 'white')
   Exit: (281) [system] char_type(' ', 'white')
^  Exit: (280) [user] is_like_space(' ')
   Call: (280) [system] get_char((0x55aefe44e2f0), _492014)
   Exit: (280) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (281) [system] peek_char((0x55aefe44e2f0), _495642)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (281) [system] 'A'=(;)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (281) [user] is_like_space('A')
^  Unify: (281) [user] is_like_space('A')
   Call: (282) [system] char_type('A', 'white')
^  Redo: (281) [user] is_like_space('A')
^  Unify: (281) [user] is_like_space('A')
   Call: (282) [system] char_type('A', end_of_line)
^  Redo: (281) [user] is_like_space('A')
^  Unify: (281) [user] is_like_space('A')
   Call: (282) [system] char_type('A', space)
^  Redo: (281) [user] is_like_space('A')
^  Unify: (281) [user] is_like_space('A')
   Call: (282) [system] char_type('A', cntrl)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _513350)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (279) [system] 'A'=')'
^  Redo: (278) [user] read_list(')', (0x55aefe44e2f0), _479642)
   Call: (279) [system] 'A'=end_of_file
^  Redo: (278) [user] read_list(')', (0x55aefe44e2f0), _479642)
^  Call: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _518928)
^  Unify: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _518928)
^  Call: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (281) [system] peek_char((0x55aefe44e2f0), _522642)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (281) [system] 'A'=(;)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (281) [user] is_like_space('A')
^  Unify: (281) [user] is_like_space('A')
   Call: (282) [system] char_type('A', 'white')
^  Redo: (281) [user] is_like_space('A')
^  Unify: (281) [user] is_like_space('A')
   Call: (282) [system] char_type('A', end_of_line)
^  Redo: (281) [user] is_like_space('A')
^  Unify: (281) [user] is_like_space('A')
   Call: (282) [system] char_type('A', space)
^  Redo: (281) [user] is_like_space('A')
^  Unify: (281) [user] is_like_space('A')
   Call: (282) [system] char_type('A', cntrl)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] get_char((0x55aefe44e2f0), _21564)
   Exit: (280) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (280) [system] 'A'='('
^  Redo: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _6036)
   Call: (280) [system] 'A'='['
^  Redo: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _6036)
   Call: (280) [system] 'A'='{'
^  Redo: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _6036)
   Call: (280) [system] 'A'='"'
^  Redo: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _6036)
   Call: (280) [system] 'A'=!
^  Redo: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _6036)
   Call: (280) [system] 'A'='\''
^  Redo: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _6036)
   Call: (280) [system] 'A'='`'
^  Redo: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _6036)
   Call: (280) [system] 'A'=end_of_file
^  Redo: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _6036)
^  Call: (280) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _6036)
^  Unify: (280) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _6036)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _40174)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _40174)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _42040)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (282) [user] is_delimiter(t)
^  Unify: (282) [user] is_delimiter(t)
   Call: (283) [system] char_type(t, space)
^  Redo: (282) [user] is_delimiter(t)
   Call: (283) [system] arg(_47680, v('(', ')', end_of_file), t)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _40174)
   Call: (282) [system] ')'==t
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _40174)
   Call: (282) [system] get_char((0x55aefe44e2f0), t)
   Exit: (282) [system] get_char((0x55aefe44e2f0), t)
   Call: (282) [system] t=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _40174)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _55046)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _55046)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _56912)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (283) [user] is_delimiter(o)
^  Unify: (283) [user] is_delimiter(o)
   Call: (284) [system] char_type(o, space)
^  Redo: (283) [user] is_delimiter(o)
   Call: (284) [system] arg(_62552, v('(', ')', end_of_file), o)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _55046)
   Call: (283) [system] ')'==o
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _55046)
   Call: (283) [system] get_char((0x55aefe44e2f0), o)
   Exit: (283) [system] get_char((0x55aefe44e2f0), o)
   Call: (283) [system] o=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _55046)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _69918)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _69918)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _71784)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (284) [user] is_delimiter(m)
^  Unify: (284) [user] is_delimiter(m)
   Call: (285) [system] char_type(m, space)
^  Redo: (284) [user] is_delimiter(m)
   Call: (285) [system] arg(_77424, v('(', ')', end_of_file), m)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _69918)
   Call: (284) [system] ')'==m
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _69918)
   Call: (284) [system] get_char((0x55aefe44e2f0), m)
   Exit: (284) [system] get_char((0x55aefe44e2f0), m)
   Call: (284) [system] m=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _69918)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _84790)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _84790)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _86656)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (285) [user] is_delimiter(')')
^  Unify: (285) [user] is_delimiter(')')
   Call: (286) [system] char_type(')', space)
^  Redo: (285) [user] is_delimiter(')')
   Call: (286) [system] arg(_92296, v('(', ')', end_of_file), ')')
   Exit: (286) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (285) [user] is_delimiter(')')
   Call: (285) [system] _84790=[]
   Exit: (285) [system] []=[]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (284) [system] _69918=[m]
   Exit: (284) [system] [m]=[m]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (283) [system] _55046=[o, m]
   Exit: (283) [system] [o, m]=[o, m]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (282) [system] _40174=[t, o, m]
   Exit: (282) [system] [t, o, m]=[t, o, m]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (281) [user] classify_and_convert_charseq('A', [t, o, m], _6036)
^  Unify: (281) [user] classify_and_convert_charseq('A', [t, o, m], _6036)
^  Call: (283) [system] setup_call_cleanup('$notrace'(_108072, _108074), once(user:catch(read_from_chars(['A', t, o, m], _6036), _108048, fail)), '$restore_trace'(_108072, _108074))
^  Unify: (283) [system] setup_call_cleanup(system:'$notrace'(_108072, _108074), system:once(user:catch(read_from_chars(['A', t, o, m], _6036), _108048, fail)), system:'$restore_trace'(_108072, _108074))
^  Call: (284) [system] sig_atomic(system:'$notrace'(_108072, _108074))
^  Exit: (283) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _6036), _108048, fail)), system:'$restore_trace'(3, -1))
   Call: (282) [system] atomic(_6036)
^  Redo: (281) [user] classify_and_convert_charseq('A', [t, o, m], _6036)
^  Unify: (281) [user] classify_and_convert_charseq('A', [t, o, m], _6036)
   Call: (282) [system] atom_chars(_6036, ['A', t, o, m])
   Exit: (282) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (281) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (280) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (279) [user] read_list(')', (0x55aefe44e2f0), _119326)
^  Unify: (279) [user] read_list(')', (0x55aefe44e2f0), _119326)
^  Call: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (281) [system] peek_char((0x55aefe44e2f0), _123040)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (281) [system] ')'=(;)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (281) [user] is_like_space(')')
^  Unify: (281) [user] is_like_space(')')
   Call: (282) [system] char_type(')', 'white')
^  Redo: (281) [user] is_like_space(')')
^  Unify: (281) [user] is_like_space(')')
   Call: (282) [system] char_type(')', end_of_line)
^  Redo: (281) [user] is_like_space(')')
^  Unify: (281) [user] is_like_space(')')
   Call: (282) [system] char_type(')', space)
^  Redo: (281) [user] is_like_space(')')
^  Unify: (281) [user] is_like_space(')')
   Call: (282) [system] char_type(')', cntrl)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] peek_char((0x55aefe44e2f0), _139824)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (280) [system] ')'=')'
   Exit: (280) [system] ')'=')'
   Call: (280) [system] get_char((0x55aefe44e2f0), _143614)
   Exit: (280) [system] get_char((0x55aefe44e2f0), ')')
   Call: (280) [system] _119326=[]
   Exit: (280) [system] []=[]
^  Exit: (279) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (279) [system] _6032=['Atom']
   Exit: (279) [system] ['Atom']=['Atom']
^  Exit: (278) [user] read_list(')', (0x55aefe44e2f0), ['Atom'])
   Call: (278) [system] _6026=['Atom', 'Atom']
   Exit: (278) [system] ['Atom', 'Atom']=['Atom', 'Atom']
^  Exit: (277) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Atom'])
   Call: (277) [system] _6020=['Atom', 'Atom', 'Atom']
   Exit: (277) [system] ['Atom', 'Atom', 'Atom']=['Atom', 'Atom', 'Atom']
^  Exit: (276) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Atom', 'Atom'])
   Call: (276) [system] _6014=['Variable', 'Atom', 'Atom', 'Atom']
   Exit: (276) [system] ['Variable', 'Atom', 'Atom', 'Atom']=['Variable', 'Atom', 'Atom', 'Atom']
^  Exit: (275) [user] read_list(')', (0x55aefe44e2f0), ['Variable', 'Atom', 'Atom', 'Atom'])
   Call: (275) [system] _6008=['Variable', 'Variable', 'Atom', 'Atom', 'Atom']
   Exit: (275) [system] ['Variable', 'Variable', 'Atom', 'Atom', 'Atom']=['Variable', 'Variable', 'Atom', 'Atom', 'Atom']
^  Exit: (274) [user] read_list(')', (0x55aefe44e2f0), ['Variable', 'Variable', 'Atom', 'Atom', 'Atom'])
   Call: (274) [system] _6002=['Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']
   Exit: (274) [system] ['Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']=['Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']
^  Exit: (273) [user] read_list(')', (0x55aefe44e2f0), ['Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'])
   Call: (273) [system] _5994=[->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']
   Exit: (273) [system] [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']=[->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'])
^  Exit: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'])
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _168672)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _168672)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _172386)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (273) [system] ')'=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', 'white')
^  Redo: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', end_of_line)
^  Redo: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', space)
^  Redo: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _189170)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (272) [system] ')'=')'
   Exit: (272) [system] ')'=')'
   Call: (272) [system] get_char((0x55aefe44e2f0), _192960)
   Exit: (272) [system] get_char((0x55aefe44e2f0), ')')
   Call: (272) [system] _168672=[]
   Exit: (272) [system] []=[]
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (271) [system] _5990=[[->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]
   Exit: (271) [system] [[->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]=[[->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [[->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
   Call: (270) [system] _5984=['if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]
   Exit: (270) [system] ['if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]=['if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]
^  Exit: (269) [user] read_list(')', (0x55aefe44e2f0), ['if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
   Call: (269) [system] _5944=[:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]
   Exit: (269) [system] [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]=[:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]
^  Exit: (268) [user] read_list(')', (0x55aefe44e2f0), [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Exit: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Exit: (266) [user] read_sexpr((0x55aefe44e2f0), [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Call: (266) [user] assertz(metta_file_comment(27, 0, 752, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], '$stream_position'(752, 27, 0, 752)))
^  Exit: (266) [user] assertz(metta_file_comment(27, 0, 752, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], '$stream_position'(752, 27, 0, 752)))
^  Exit: (264) [system] once(user:(read_position((0x55aefe44e2f0), 27, 0, 752, '$stream_position'(752, 27, 0, 752)), read_sexpr((0x55aefe44e2f0), [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]), assertz(metta_file_comment(27, 0, 752, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], '$stream_position'(752, 27, 0, 752)))))
   Call: (264) [system] fail
^  Redo: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Unify: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Call: (264) [user] retract(metta_file_comment(_213334, _213336, _213338, _213340, _213342))
^  Exit: (264) [user] retract(metta_file_comment(27, 0, 752, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], '$stream_position'(752, 27, 0, 752)))
^  Call: (264) [user] trly(untyped_to_metta, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _5908)
^  Unify: (264) [user] trly(untyped_to_metta, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _5908)
^  Call: (265) [user] once(call(untyped_to_metta, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _217144))
^  Unify: (265) [system] once(user:call(untyped_to_metta, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _217144))
^  Call: (266) [user] call(untyped_to_metta, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _217144)
^  Unify: (266) [system] call(user:untyped_to_metta, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _217144)
^  Call: (267) [user] untyped_to_metta([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _217144)
^  Unify: (267) [user] untyped_to_metta([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _217144)
^  Call: (268) [user] must_det_ll(trly(mfix_vars1, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _222756))
^  Unify: (268) [user] must_det_ll(user:trly(mfix_vars1, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _222756))
^  Call: (269) [user] once(user:trly(mfix_vars1, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _222756))
^  Unify: (269) [system] once(user:trly(mfix_vars1, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _222756))
^  Call: (270) [user] trly(mfix_vars1, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _222756)
^  Unify: (270) [user] trly(mfix_vars1, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _222756)
^  Call: (271) [user] once(call(mfix_vars1, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342))
^  Unify: (271) [system] once(user:call(mfix_vars1, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342))
^  Call: (272) [user] call(mfix_vars1, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342)
^  Unify: (272) [system] call(user:mfix_vars1, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342)
^  Call: (273) [user] mfix_vars1([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342)
^  Unify: (273) [user] mfix_vars1([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342)
   Call: (274) [system] var([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Redo: (273) [user] mfix_vars1([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342)
^  Unify: (273) [user] mfix_vars1([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], '$VAR'(_235802))
   Call: (274) [system] atom([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Redo: (273) [user] mfix_vars1([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342)
^  Unify: (273) [user] mfix_vars1([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342)
   Call: (274) [system] [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]==true
^  Redo: (273) [user] mfix_vars1([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342)
^  Unify: (273) [user] mfix_vars1([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342)
   Call: (274) [system] [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]==false
^  Redo: (273) [user] mfix_vars1([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342)
^  Unify: (273) [user] mfix_vars1([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342)
   Call: (274) [system] (:)=='['
^  Redo: (273) [user] mfix_vars1([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342)
^  Unify: (273) [user] mfix_vars1([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342)
   Call: (274) [system] (:)=='{'
^  Redo: (273) [user] mfix_vars1([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342)
^  Unify: (273) [user] mfix_vars1([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342)
   Call: (274) [system] is_list(['if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
   Exit: (274) [system] is_list(['if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
   Call: (274) [lists] lists:last(['if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _252496)
   Unify: (274) [lists] lists:last(['if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _252496)
   Call: (275) [lists] lists:last_([[->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], 'if-decons-expr', _252496)
   Unify: (275) [lists] lists:last_([[->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], 'if-decons-expr', _252496)
   Call: (276) [lists] lists:last_([], [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _252496)
   Unify: (276) [lists] lists:last_([], [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'])
   Exit: (276) [lists] lists:last_([], [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'])
   Exit: (275) [lists] lists:last_([[->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'])
   Exit: (274) [lists] lists:last(['if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'])
   Call: (274) [system] [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']=='}'
^  Redo: (273) [user] mfix_vars1([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342)
^  Unify: (273) [user] mfix_vars1([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342)
   Call: (274) [system] [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]==[_263660, _263666]
^  Redo: (273) [user] mfix_vars1([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342)
^  Unify: (273) [user] mfix_vars1([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342)
   Call: (274) [system] fail
^  Redo: (273) [user] mfix_vars1([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342)
^  Unify: (273) [user] mfix_vars1([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342)
   Call: (274) [system] is_list([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
   Exit: (274) [system] is_list([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Call: (274) [user] apply:maplist(mfix_vars1, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342)
^  Unify: (274) [apply] apply:maplist(user:mfix_vars1, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342)
   Call: (275) [apply] apply:maplist_([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _228342, user:mfix_vars1)
   Unify: (275) [apply] apply:maplist_([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [_273890|_273892], user:mfix_vars1)
^  Call: (276) [user] mfix_vars1(:, _273890)
^  Unify: (276) [user] mfix_vars1(:, _273890)
   Call: (277) [system] var(:)
^  Redo: (276) [user] mfix_vars1(:, _273890)
^  Unify: (276) [user] mfix_vars1(:, '$VAR'(_278536))
   Call: (277) [system] atom(:)
   Exit: (277) [system] atom(:)
^  Call: (277) [user] symbol_concat($, _281314, :)
^  Unify: (277) [user] symbol_concat($, _281314, :)
   Call: (278) [system] atom_concat($, _281314, :)
   Fail: (278) [system] atom_concat($, _281314, :)
^  Fail: (277) [user] symbol_concat($, _281314, :)
^  Redo: (276) [user] mfix_vars1(:, _273890)
^  Unify: (276) [user] mfix_vars1(:, _273890)
   Call: (277) [system] (:)==true
^  Redo: (276) [user] mfix_vars1(:, _273890)
^  Unify: (276) [user] mfix_vars1(:, _273890)
   Call: (277) [system] (:)==false
^  Redo: (276) [user] mfix_vars1(:, _273890)
^  Unify: (276) [user] mfix_vars1(:, _273890)
   Call: (277) [system] (:)==[_293402, _293408]
^  Redo: (276) [user] mfix_vars1(:, _273890)
^  Unify: (276) [user] mfix_vars1(:, _273890)
   Call: (277) [system] is_list(:)
^  Redo: (276) [user] mfix_vars1(:, _273890)
^  Unify: (276) [user] mfix_vars1(:, _273890)
   Call: (277) [system] string(:)
^  Redo: (276) [user] mfix_vars1(:, _273890)
^  Unify: (276) [user] mfix_vars1(:, _273890)
   Call: (277) [system] compound(:)
^  Redo: (276) [user] mfix_vars1(:, _273890)
^  Unify: (276) [user] mfix_vars1(:, _273890)
^  Call: (277) [user] symbol(:)
^  Unify: (277) [user] symbol(:)
   Call: (278) [system] atom(:)
   Exit: (278) [system] atom(:)
^  Exit: (277) [user] symbol(:)
^  Unify: (276) [user] mfix_vars1(:, :)
^  Exit: (276) [user] mfix_vars1(:, :)
   Call: (276) [apply] apply:maplist_(['if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _273892, user:mfix_vars1)
   Unify: (276) [apply] apply:maplist_(['if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [_311946|_311948], user:mfix_vars1)
^  Call: (277) [user] mfix_vars1('if-decons-expr', _311946)
^  Unify: (277) [user] mfix_vars1('if-decons-expr', _311946)
   Call: (278) [system] var('if-decons-expr')
^  Redo: (277) [user] mfix_vars1('if-decons-expr', _311946)
^  Unify: (277) [user] mfix_vars1('if-decons-expr', '$VAR'(_316592))
   Call: (278) [system] atom('if-decons-expr')
   Exit: (278) [system] atom('if-decons-expr')
^  Call: (278) [user] symbol_concat($, _319370, 'if-decons-expr')
^  Unify: (278) [user] symbol_concat($, _319370, 'if-decons-expr')
   Call: (279) [system] atom_concat($, _319370, 'if-decons-expr')
   Fail: (279) [system] atom_concat($, _319370, 'if-decons-expr')
^  Fail: (278) [user] symbol_concat($, _319370, 'if-decons-expr')
^  Redo: (277) [user] mfix_vars1('if-decons-expr', _311946)
^  Unify: (277) [user] mfix_vars1('if-decons-expr', _311946)
   Call: (278) [system] 'if-decons-expr'==true
^  Redo: (277) [user] mfix_vars1('if-decons-expr', _311946)
^  Unify: (277) [user] mfix_vars1('if-decons-expr', _311946)
   Call: (278) [system] 'if-decons-expr'==false
^  Redo: (277) [user] mfix_vars1('if-decons-expr', _311946)
^  Unify: (277) [user] mfix_vars1('if-decons-expr', _311946)
   Call: (278) [system] 'if-decons-expr'==[_331458, _331464]
^  Redo: (277) [user] mfix_vars1('if-decons-expr', _311946)
^  Unify: (277) [user] mfix_vars1('if-decons-expr', _311946)
   Call: (278) [system] is_list('if-decons-expr')
^  Redo: (277) [user] mfix_vars1('if-decons-expr', _311946)
^  Unify: (277) [user] mfix_vars1('if-decons-expr', _311946)
   Call: (278) [system] string('if-decons-expr')
^  Redo: (277) [user] mfix_vars1('if-decons-expr', _311946)
^  Unify: (277) [user] mfix_vars1('if-decons-expr', _311946)
   Call: (278) [system] compound('if-decons-expr')
^  Redo: (277) [user] mfix_vars1('if-decons-expr', _311946)
^  Unify: (277) [user] mfix_vars1('if-decons-expr', _311946)
^  Call: (278) [user] symbol('if-decons-expr')
^  Unify: (278) [user] symbol('if-decons-expr')
   Call: (279) [system] atom('if-decons-expr')
   Exit: (279) [system] atom('if-decons-expr')
^  Exit: (278) [user] symbol('if-decons-expr')
^  Unify: (277) [user] mfix_vars1('if-decons-expr', 'if-decons-expr')
^  Exit: (277) [user] mfix_vars1('if-decons-expr', 'if-decons-expr')
   Call: (277) [apply] apply:maplist_([[->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _311948, user:mfix_vars1)
   Unify: (277) [apply] apply:maplist_([[->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [_350002|_350004], user:mfix_vars1)
^  Call: (278) [user] mfix_vars1([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _350002)
^  Unify: (278) [user] mfix_vars1([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _350002)
   Call: (279) [system] var([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'])
^  Redo: (278) [user] mfix_vars1([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _350002)
^  Unify: (278) [user] mfix_vars1([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], '$VAR'(_354648))
   Call: (279) [system] atom([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'])
^  Redo: (278) [user] mfix_vars1([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _350002)
^  Unify: (278) [user] mfix_vars1([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _350002)
   Call: (279) [system] [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']==true
^  Redo: (278) [user] mfix_vars1([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _350002)
^  Unify: (278) [user] mfix_vars1([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _350002)
   Call: (279) [system] [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']==false
^  Redo: (278) [user] mfix_vars1([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _350002)
^  Unify: (278) [user] mfix_vars1([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _350002)
   Call: (279) [system] (->)=='['
^  Redo: (278) [user] mfix_vars1([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _350002)
^  Unify: (278) [user] mfix_vars1([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _350002)
   Call: (279) [system] (->)=='{'
^  Redo: (278) [user] mfix_vars1([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _350002)
^  Unify: (278) [user] mfix_vars1([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _350002)
   Call: (279) [system] is_list(['Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'])
   Exit: (279) [system] is_list(['Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'])
   Call: (279) [lists] lists:last(['Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _371342)
   Unify: (279) [lists] lists:last(['Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _371342)
   Call: (280) [lists] lists:last_(['Variable', 'Variable', 'Atom', 'Atom', 'Atom'], 'Expression', _371342)
   Unify: (280) [lists] lists:last_(['Variable', 'Variable', 'Atom', 'Atom', 'Atom'], 'Expression', _371342)
   Call: (281) [lists] lists:last_(['Variable', 'Atom', 'Atom', 'Atom'], 'Variable', _371342)
   Unify: (281) [lists] lists:last_(['Variable', 'Atom', 'Atom', 'Atom'], 'Variable', _371342)
   Call: (282) [lists] lists:last_(['Atom', 'Atom', 'Atom'], 'Variable', _371342)
   Unify: (282) [lists] lists:last_(['Atom', 'Atom', 'Atom'], 'Variable', _371342)
   Call: (283) [lists] lists:last_(['Atom', 'Atom'], 'Atom', _371342)
   Unify: (283) [lists] lists:last_(['Atom', 'Atom'], 'Atom', _371342)
   Call: (284) [lists] lists:last_(['Atom'], 'Atom', _371342)
   Unify: (284) [lists] lists:last_(['Atom'], 'Atom', _371342)
   Call: (285) [lists] lists:last_([], 'Atom', _371342)
   Unify: (285) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (285) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (284) [lists] lists:last_(['Atom'], 'Atom', 'Atom')
   Exit: (283) [lists] lists:last_(['Atom', 'Atom'], 'Atom', 'Atom')
   Exit: (282) [lists] lists:last_(['Atom', 'Atom', 'Atom'], 'Variable', 'Atom')
   Exit: (281) [lists] lists:last_(['Variable', 'Atom', 'Atom', 'Atom'], 'Variable', 'Atom')
   Exit: (280) [lists] lists:last_(['Variable', 'Variable', 'Atom', 'Atom', 'Atom'], 'Expression', 'Atom')
   Exit: (279) [lists] lists:last(['Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], 'Atom')
   Call: (279) [system] 'Atom'=='}'
^  Redo: (278) [user] mfix_vars1([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _350002)
^  Unify: (278) [user] mfix_vars1([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _350002)
   Call: (279) [system] [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']==[_393690, _393696]
^  Redo: (278) [user] mfix_vars1([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _350002)
^  Unify: (278) [user] mfix_vars1([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _350002)
   Call: (279) [system] fail
^  Redo: (278) [user] mfix_vars1([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _350002)
^  Unify: (278) [user] mfix_vars1([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _350002)
   Call: (279) [system] is_list([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'])
   Exit: (279) [system] is_list([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'])
^  Call: (279) [user] apply:maplist(mfix_vars1, [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _350002)
^  Unify: (279) [apply] apply:maplist(user:mfix_vars1, [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _350002)
   Call: (280) [apply] apply:maplist_([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _350002, user:mfix_vars1)
   Unify: (280) [apply] apply:maplist_([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], [_403920|_403922], user:mfix_vars1)
^  Call: (281) [user] mfix_vars1(->, _403920)
^  Unify: (281) [user] mfix_vars1(->, _403920)
   Call: (282) [system] var(->)
^  Redo: (281) [user] mfix_vars1(->, _403920)
^  Unify: (281) [user] mfix_vars1(->, '$VAR'(_408566))
   Call: (282) [system] atom(->)
   Exit: (282) [system] atom(->)
^  Call: (282) [user] symbol_concat($, _411344, ->)
^  Unify: (282) [user] symbol_concat($, _411344, ->)
   Call: (283) [system] atom_concat($, _411344, ->)
   Fail: (283) [system] atom_concat($, _411344, ->)
^  Fail: (282) [user] symbol_concat($, _411344, ->)
^  Redo: (281) [user] mfix_vars1(->, _403920)
^  Unify: (281) [user] mfix_vars1(->, _403920)
   Call: (282) [system] (->)==true
^  Redo: (281) [user] mfix_vars1(->, _403920)
^  Unify: (281) [user] mfix_vars1(->, _403920)
   Call: (282) [system] (->)==false
^  Redo: (281) [user] mfix_vars1(->, _403920)
^  Unify: (281) [user] mfix_vars1(->, _403920)
   Call: (282) [system] (->)==[_423432, _423438]
^  Redo: (281) [user] mfix_vars1(->, _403920)
^  Unify: (281) [user] mfix_vars1(->, _403920)
   Call: (282) [system] is_list(->)
^  Redo: (281) [user] mfix_vars1(->, _403920)
^  Unify: (281) [user] mfix_vars1(->, _403920)
   Call: (282) [system] string(->)
^  Redo: (281) [user] mfix_vars1(->, _403920)
^  Unify: (281) [user] mfix_vars1(->, _403920)
   Call: (282) [system] compound(->)
^  Redo: (281) [user] mfix_vars1(->, _403920)
^  Unify: (281) [user] mfix_vars1(->, _403920)
^  Call: (282) [user] symbol(->)
^  Unify: (282) [user] symbol(->)
   Call: (283) [system] atom(->)
   Exit: (283) [system] atom(->)
^  Exit: (282) [user] symbol(->)
^  Unify: (281) [user] mfix_vars1(->, ->)
^  Exit: (281) [user] mfix_vars1(->, ->)
   Call: (281) [apply] apply:maplist_(['Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _403922, user:mfix_vars1)
   Unify: (281) [apply] apply:maplist_(['Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], [_441976|_441978], user:mfix_vars1)
^  Call: (282) [user] mfix_vars1('Expression', _441976)
^  Unify: (282) [user] mfix_vars1('Expression', _441976)
   Call: (283) [system] var('Expression')
^  Redo: (282) [user] mfix_vars1('Expression', _441976)
^  Unify: (282) [user] mfix_vars1('Expression', '$VAR'(_446622))
   Call: (283) [system] atom('Expression')
   Exit: (283) [system] atom('Expression')
^  Call: (283) [user] symbol_concat($, _449400, 'Expression')
^  Unify: (283) [user] symbol_concat($, _449400, 'Expression')
   Call: (284) [system] atom_concat($, _449400, 'Expression')
   Fail: (284) [system] atom_concat($, _449400, 'Expression')
^  Fail: (283) [user] symbol_concat($, _449400, 'Expression')
^  Redo: (282) [user] mfix_vars1('Expression', _441976)
^  Unify: (282) [user] mfix_vars1('Expression', _441976)
   Call: (283) [system] 'Expression'==true
^  Redo: (282) [user] mfix_vars1('Expression', _441976)
^  Unify: (282) [user] mfix_vars1('Expression', _441976)
   Call: (283) [system] 'Expression'==false
^  Redo: (282) [user] mfix_vars1('Expression', _441976)
^  Unify: (282) [user] mfix_vars1('Expression', _441976)
   Call: (283) [system] 'Expression'==[_461488, _461494]
^  Redo: (282) [user] mfix_vars1('Expression', _441976)
^  Unify: (282) [user] mfix_vars1('Expression', _441976)
   Call: (283) [system] is_list('Expression')
^  Redo: (282) [user] mfix_vars1('Expression', _441976)
^  Unify: (282) [user] mfix_vars1('Expression', _441976)
   Call: (283) [system] string('Expression')
^  Redo: (282) [user] mfix_vars1('Expression', _441976)
^  Unify: (282) [user] mfix_vars1('Expression', _441976)
   Call: (283) [system] compound('Expression')
^  Redo: (282) [user] mfix_vars1('Expression', _441976)
^  Unify: (282) [user] mfix_vars1('Expression', _441976)
^  Call: (283) [user] symbol('Expression')
^  Unify: (283) [user] symbol('Expression')
   Call: (284) [system] atom('Expression')
   Exit: (284) [system] atom('Expression')
^  Exit: (283) [user] symbol('Expression')
^  Unify: (282) [user] mfix_vars1('Expression', 'Expression')
^  Exit: (282) [user] mfix_vars1('Expression', 'Expression')
   Call: (282) [apply] apply:maplist_(['Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _441978, user:mfix_vars1)
   Unify: (282) [apply] apply:maplist_(['Variable', 'Variable', 'Atom', 'Atom', 'Atom'], [_480032|_480034], user:mfix_vars1)
^  Call: (283) [user] mfix_vars1('Variable', _480032)
^  Unify: (283) [user] mfix_vars1('Variable', _480032)
   Call: (284) [system] var('Variable')
^  Redo: (283) [user] mfix_vars1('Variable', _480032)
^  Unify: (283) [user] mfix_vars1('Variable', '$VAR'(_484678))
   Call: (284) [system] atom('Variable')
   Exit: (284) [system] atom('Variable')
^  Call: (284) [user] symbol_concat($, _487456, 'Variable')
^  Unify: (284) [user] symbol_concat($, _487456, 'Variable')
   Call: (285) [system] atom_concat($, _487456, 'Variable')
   Fail: (285) [system] atom_concat($, _487456, 'Variable')
^  Fail: (284) [user] symbol_concat($, _487456, 'Variable')
^  Redo: (283) [user] mfix_vars1('Variable', _480032)
^  Unify: (283) [user] mfix_vars1('Variable', _480032)
   Call: (284) [system] 'Variable'==true
^  Redo: (283) [user] mfix_vars1('Variable', _480032)
^  Unify: (283) [user] mfix_vars1('Variable', _480032)
   Call: (284) [system] 'Variable'==false
^  Redo: (283) [user] mfix_vars1('Variable', _480032)
^  Unify: (283) [user] mfix_vars1('Variable', _480032)
   Call: (284) [system] 'Variable'==[_499544, _499550]
^  Redo: (283) [user] mfix_vars1('Variable', _480032)
^  Unify: (283) [user] mfix_vars1('Variable', _480032)
   Call: (284) [system] is_list('Variable')
^  Redo: (283) [user] mfix_vars1('Variable', _480032)
^  Unify: (283) [user] mfix_vars1('Variable', _480032)
   Call: (284) [system] string('Variable')
^  Redo: (283) [user] mfix_vars1('Variable', _480032)
^  Unify: (283) [user] mfix_vars1('Variable', _480032)
   Call: (284) [system] compound('Variable')
^  Redo: (283) [user] mfix_vars1('Variable', _480032)
^  Unify: (283) [user] mfix_vars1('Variable', _480032)
^  Call: (284) [user] symbol('Variable')
^  Unify: (284) [user] symbol('Variable')
   Call: (285) [system] atom('Variable')
   Exit: (285) [system] atom('Variable')
^  Exit: (284) [user] symbol('Variable')
^  Unify: (283) [user] mfix_vars1('Variable', 'Variable')
^  Exit: (283) [user] mfix_vars1('Variable', 'Variable')
   Call: (283) [apply] apply:maplist_(['Variable', 'Atom', 'Atom', 'Atom'], _480034, user:mfix_vars1)
   Unify: (283) [apply] apply:maplist_(['Variable', 'Atom', 'Atom', 'Atom'], [_518088|_518090], user:mfix_vars1)
^  Call: (284) [user] mfix_vars1('Variable', _518088)
^  Unify: (284) [user] mfix_vars1('Variable', _518088)
   Call: (285) [system] var('Variable')
^  Redo: (284) [user] mfix_vars1('Variable', _518088)
^  Unify: (284) [user] mfix_vars1('Variable', '$VAR'(_522734))
   Call: (285) [system] atom('Variable')
   Exit: (285) [system] atom('Variable')
^  Call: (285) [user] symbol_concat($, _7674, 'Variable')
^  Unify: (285) [user] symbol_concat($, _7674, 'Variable')
   Call: (286) [system] atom_concat($, _7674, 'Variable')
   Fail: (286) [system] atom_concat($, _7674, 'Variable')
^  Fail: (285) [user] symbol_concat($, _7674, 'Variable')
^  Redo: (284) [user] mfix_vars1('Variable', _6080)
^  Unify: (284) [user] mfix_vars1('Variable', _6080)
   Call: (285) [system] 'Variable'==true
^  Redo: (284) [user] mfix_vars1('Variable', _6080)
^  Unify: (284) [user] mfix_vars1('Variable', _6080)
   Call: (285) [system] 'Variable'==false
^  Redo: (284) [user] mfix_vars1('Variable', _6080)
^  Unify: (284) [user] mfix_vars1('Variable', _6080)
   Call: (285) [system] 'Variable'==[_19762, _19768]
^  Redo: (284) [user] mfix_vars1('Variable', _6080)
^  Unify: (284) [user] mfix_vars1('Variable', _6080)
   Call: (285) [system] is_list('Variable')
^  Redo: (284) [user] mfix_vars1('Variable', _6080)
^  Unify: (284) [user] mfix_vars1('Variable', _6080)
   Call: (285) [system] string('Variable')
^  Redo: (284) [user] mfix_vars1('Variable', _6080)
^  Unify: (284) [user] mfix_vars1('Variable', _6080)
   Call: (285) [system] compound('Variable')
^  Redo: (284) [user] mfix_vars1('Variable', _6080)
^  Unify: (284) [user] mfix_vars1('Variable', _6080)
^  Call: (285) [user] symbol('Variable')
^  Unify: (285) [user] symbol('Variable')
   Call: (286) [system] atom('Variable')
   Exit: (286) [system] atom('Variable')
^  Exit: (285) [user] symbol('Variable')
^  Unify: (284) [user] mfix_vars1('Variable', 'Variable')
^  Exit: (284) [user] mfix_vars1('Variable', 'Variable')
   Call: (284) [apply] apply:maplist_(['Atom', 'Atom', 'Atom'], _6082, user:mfix_vars1)
   Unify: (284) [apply] apply:maplist_(['Atom', 'Atom', 'Atom'], [_38306|_38308], user:mfix_vars1)
^  Call: (285) [user] mfix_vars1('Atom', _38306)
^  Unify: (285) [user] mfix_vars1('Atom', _38306)
   Call: (286) [system] var('Atom')
^  Redo: (285) [user] mfix_vars1('Atom', _38306)
^  Unify: (285) [user] mfix_vars1('Atom', '$VAR'(_42952))
   Call: (286) [system] atom('Atom')
   Exit: (286) [system] atom('Atom')
^  Call: (286) [user] symbol_concat($, _45730, 'Atom')
^  Unify: (286) [user] symbol_concat($, _45730, 'Atom')
   Call: (287) [system] atom_concat($, _45730, 'Atom')
   Fail: (287) [system] atom_concat($, _45730, 'Atom')
^  Fail: (286) [user] symbol_concat($, _45730, 'Atom')
^  Redo: (285) [user] mfix_vars1('Atom', _38306)
^  Unify: (285) [user] mfix_vars1('Atom', _38306)
   Call: (286) [system] 'Atom'==true
^  Redo: (285) [user] mfix_vars1('Atom', _38306)
^  Unify: (285) [user] mfix_vars1('Atom', _38306)
   Call: (286) [system] 'Atom'==false
^  Redo: (285) [user] mfix_vars1('Atom', _38306)
^  Unify: (285) [user] mfix_vars1('Atom', _38306)
   Call: (286) [system] 'Atom'==[_57818, _57824]
^  Redo: (285) [user] mfix_vars1('Atom', _38306)
^  Unify: (285) [user] mfix_vars1('Atom', _38306)
   Call: (286) [system] is_list('Atom')
^  Redo: (285) [user] mfix_vars1('Atom', _38306)
^  Unify: (285) [user] mfix_vars1('Atom', _38306)
   Call: (286) [system] string('Atom')
^  Redo: (285) [user] mfix_vars1('Atom', _38306)
^  Unify: (285) [user] mfix_vars1('Atom', _38306)
   Call: (286) [system] compound('Atom')
^  Redo: (285) [user] mfix_vars1('Atom', _38306)
^  Unify: (285) [user] mfix_vars1('Atom', _38306)
^  Call: (286) [user] symbol('Atom')
^  Unify: (286) [user] symbol('Atom')
   Call: (287) [system] atom('Atom')
   Exit: (287) [system] atom('Atom')
^  Exit: (286) [user] symbol('Atom')
^  Unify: (285) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (285) [user] mfix_vars1('Atom', 'Atom')
   Call: (285) [apply] apply:maplist_(['Atom', 'Atom'], _38308, user:mfix_vars1)
   Unify: (285) [apply] apply:maplist_(['Atom', 'Atom'], [_76362|_76364], user:mfix_vars1)
^  Call: (286) [user] mfix_vars1('Atom', _76362)
^  Unify: (286) [user] mfix_vars1('Atom', _76362)
   Call: (287) [system] var('Atom')
^  Redo: (286) [user] mfix_vars1('Atom', _76362)
^  Unify: (286) [user] mfix_vars1('Atom', '$VAR'(_81008))
   Call: (287) [system] atom('Atom')
   Exit: (287) [system] atom('Atom')
^  Call: (287) [user] symbol_concat($, _83786, 'Atom')
^  Unify: (287) [user] symbol_concat($, _83786, 'Atom')
   Call: (288) [system] atom_concat($, _83786, 'Atom')
   Fail: (288) [system] atom_concat($, _83786, 'Atom')
^  Fail: (287) [user] symbol_concat($, _83786, 'Atom')
^  Redo: (286) [user] mfix_vars1('Atom', _76362)
^  Unify: (286) [user] mfix_vars1('Atom', _76362)
   Call: (287) [system] 'Atom'==true
^  Redo: (286) [user] mfix_vars1('Atom', _76362)
^  Unify: (286) [user] mfix_vars1('Atom', _76362)
   Call: (287) [system] 'Atom'==false
^  Redo: (286) [user] mfix_vars1('Atom', _76362)
^  Unify: (286) [user] mfix_vars1('Atom', _76362)
   Call: (287) [system] 'Atom'==[_95874, _95880]
^  Redo: (286) [user] mfix_vars1('Atom', _76362)
^  Unify: (286) [user] mfix_vars1('Atom', _76362)
   Call: (287) [system] is_list('Atom')
^  Redo: (286) [user] mfix_vars1('Atom', _76362)
^  Unify: (286) [user] mfix_vars1('Atom', _76362)
   Call: (287) [system] string('Atom')
^  Redo: (286) [user] mfix_vars1('Atom', _76362)
^  Unify: (286) [user] mfix_vars1('Atom', _76362)
   Call: (287) [system] compound('Atom')
^  Redo: (286) [user] mfix_vars1('Atom', _76362)
^  Unify: (286) [user] mfix_vars1('Atom', _76362)
^  Call: (287) [user] symbol('Atom')
^  Unify: (287) [user] symbol('Atom')
   Call: (288) [system] atom('Atom')
   Exit: (288) [system] atom('Atom')
^  Exit: (287) [user] symbol('Atom')
^  Unify: (286) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (286) [user] mfix_vars1('Atom', 'Atom')
   Call: (286) [apply] apply:maplist_(['Atom'], _76364, user:mfix_vars1)
   Unify: (286) [apply] apply:maplist_(['Atom'], [_114418|_114420], user:mfix_vars1)
^  Call: (287) [user] mfix_vars1('Atom', _114418)
^  Unify: (287) [user] mfix_vars1('Atom', _114418)
   Call: (288) [system] var('Atom')
^  Redo: (287) [user] mfix_vars1('Atom', _114418)
^  Unify: (287) [user] mfix_vars1('Atom', '$VAR'(_119064))
   Call: (288) [system] atom('Atom')
   Exit: (288) [system] atom('Atom')
^  Call: (288) [user] symbol_concat($, _121842, 'Atom')
^  Unify: (288) [user] symbol_concat($, _121842, 'Atom')
   Call: (289) [system] atom_concat($, _121842, 'Atom')
   Fail: (289) [system] atom_concat($, _121842, 'Atom')
^  Fail: (288) [user] symbol_concat($, _121842, 'Atom')
^  Redo: (287) [user] mfix_vars1('Atom', _114418)
^  Unify: (287) [user] mfix_vars1('Atom', _114418)
   Call: (288) [system] 'Atom'==true
^  Redo: (287) [user] mfix_vars1('Atom', _114418)
^  Unify: (287) [user] mfix_vars1('Atom', _114418)
   Call: (288) [system] 'Atom'==false
^  Redo: (287) [user] mfix_vars1('Atom', _114418)
^  Unify: (287) [user] mfix_vars1('Atom', _114418)
   Call: (288) [system] 'Atom'==[_133930, _133936]
^  Redo: (287) [user] mfix_vars1('Atom', _114418)
^  Unify: (287) [user] mfix_vars1('Atom', _114418)
   Call: (288) [system] is_list('Atom')
^  Redo: (287) [user] mfix_vars1('Atom', _114418)
^  Unify: (287) [user] mfix_vars1('Atom', _114418)
   Call: (288) [system] string('Atom')
^  Redo: (287) [user] mfix_vars1('Atom', _114418)
^  Unify: (287) [user] mfix_vars1('Atom', _114418)
   Call: (288) [system] compound('Atom')
^  Redo: (287) [user] mfix_vars1('Atom', _114418)
^  Unify: (287) [user] mfix_vars1('Atom', _114418)
^  Call: (288) [user] symbol('Atom')
^  Unify: (288) [user] symbol('Atom')
   Call: (289) [system] atom('Atom')
   Exit: (289) [system] atom('Atom')
^  Exit: (288) [user] symbol('Atom')
^  Unify: (287) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (287) [user] mfix_vars1('Atom', 'Atom')
   Call: (287) [apply] apply:maplist_([], _114420, user:mfix_vars1)
   Unify: (287) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (287) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (286) [apply] apply:maplist_(['Atom'], ['Atom'], user:mfix_vars1)
   Exit: (285) [apply] apply:maplist_(['Atom', 'Atom'], ['Atom', 'Atom'], user:mfix_vars1)
   Exit: (284) [apply] apply:maplist_(['Atom', 'Atom', 'Atom'], ['Atom', 'Atom', 'Atom'], user:mfix_vars1)
   Exit: (283) [apply] apply:maplist_(['Variable', 'Atom', 'Atom', 'Atom'], ['Variable', 'Atom', 'Atom', 'Atom'], user:mfix_vars1)
   Exit: (282) [apply] apply:maplist_(['Variable', 'Variable', 'Atom', 'Atom', 'Atom'], ['Variable', 'Variable', 'Atom', 'Atom', 'Atom'], user:mfix_vars1)
   Exit: (281) [apply] apply:maplist_(['Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], ['Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], user:mfix_vars1)
   Exit: (280) [apply] apply:maplist_([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], user:mfix_vars1)
^  Exit: (279) [apply] apply:maplist(user:mfix_vars1, [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'])
^  Exit: (278) [user] mfix_vars1([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'])
   Call: (278) [apply] apply:maplist_([], _6052, user:mfix_vars1)
   Unify: (278) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (278) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (277) [apply] apply:maplist_([[->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [[->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (276) [apply] apply:maplist_(['if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], ['if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (275) [apply] apply:maplist_([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], user:mfix_vars1)
^  Exit: (274) [apply] apply:maplist(user:mfix_vars1, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Exit: (273) [user] mfix_vars1([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Exit: (272) [system] call(user:mfix_vars1, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Exit: (271) [system] once(user:call(mfix_vars1, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]))
   Call: (271) [system] [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]\=@=[:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]
^  Redo: (270) [user] trly(mfix_vars1, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _6002)
^  Unify: (270) [user] trly(mfix_vars1, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Exit: (270) [user] trly(mfix_vars1, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Exit: (269) [system] once(user:trly(mfix_vars1, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]))
^  Exit: (268) [user] must_det_ll(user:trly(mfix_vars1, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]))
^  Call: (268) [user] must_det_ll(trly(cons_to_c, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _177636))
^  Unify: (268) [user] must_det_ll(user:trly(cons_to_c, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _177636))
^  Call: (269) [user] once(user:trly(cons_to_c, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _177636))
^  Unify: (269) [system] once(user:trly(cons_to_c, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _177636))
^  Call: (270) [user] trly(cons_to_c, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _177636)
^  Unify: (270) [user] trly(cons_to_c, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _177636)
^  Call: (271) [user] once(call(cons_to_c, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _183222))
^  Unify: (271) [system] once(user:call(cons_to_c, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _183222))
^  Call: (272) [user] call(cons_to_c, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _183222)
^  Unify: (272) [system] call(user:cons_to_c, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _183222)
^  Call: (273) [user] cons_to_c([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _183222)
^  Unify: (273) [user] cons_to_c([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Call: (274) [user] no_cons_reduce
^  Unify: (274) [user] no_cons_reduce
^  Exit: (274) [user] no_cons_reduce
^  Exit: (273) [user] cons_to_c([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Exit: (272) [system] call(user:cons_to_c, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Exit: (271) [system] once(user:call(cons_to_c, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]))
   Call: (271) [system] [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]\=@=[:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]
^  Redo: (270) [user] trly(cons_to_c, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _177636)
^  Unify: (270) [user] trly(cons_to_c, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Exit: (270) [user] trly(cons_to_c, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Exit: (269) [system] once(user:trly(cons_to_c, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]))
^  Exit: (268) [user] must_det_ll(user:trly(cons_to_c, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]))
^  Call: (268) [user] must_det_ll(trly(cons_to_l, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _5982))
^  Unify: (268) [user] must_det_ll(user:trly(cons_to_l, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _5982))
^  Call: (269) [user] once(user:trly(cons_to_l, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _5982))
^  Unify: (269) [system] once(user:trly(cons_to_l, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _5982))
^  Call: (270) [user] trly(cons_to_l, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _5982)
^  Unify: (270) [user] trly(cons_to_l, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _5982)
^  Call: (271) [user] once(call(cons_to_l, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _205542))
^  Unify: (271) [system] once(user:call(cons_to_l, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _205542))
^  Call: (272) [user] call(cons_to_l, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _205542)
^  Unify: (272) [system] call(user:cons_to_l, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _205542)
^  Call: (273) [user] cons_to_l([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _205542)
^  Unify: (273) [user] cons_to_l([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Call: (274) [user] no_cons_reduce
^  Unify: (274) [user] no_cons_reduce
^  Exit: (274) [user] no_cons_reduce
^  Exit: (273) [user] cons_to_l([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Exit: (272) [system] call(user:cons_to_l, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Exit: (271) [system] once(user:call(cons_to_l, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]))
   Call: (271) [system] [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]\=@=[:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]
^  Redo: (270) [user] trly(cons_to_l, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _5982)
^  Unify: (270) [user] trly(cons_to_l, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Exit: (270) [user] trly(cons_to_l, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Exit: (269) [system] once(user:trly(cons_to_l, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]))
^  Exit: (268) [user] must_det_ll(user:trly(cons_to_l, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]))
^  Exit: (267) [user] untyped_to_metta([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Exit: (266) [system] call(user:untyped_to_metta, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Exit: (265) [system] once(user:call(untyped_to_metta, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]))
   Call: (265) [system] [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]\=@=[:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']]
^  Redo: (264) [user] trly(untyped_to_metta, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _5908)
^  Unify: (264) [user] trly(untyped_to_metta, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Exit: (264) [user] trly(untyped_to_metta, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Exit: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
   Call: (263) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])))
   Unify: (263) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])))
   Exit: (263) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])))
^  Exit: (262) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Exit: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Exit: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Call: (257) [user] subst_vars([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _240778, [], _240780)
^  Unify: (257) [user] subst_vars([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [], [])
   Call: (258) [system] var([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Redo: (257) [user] subst_vars([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _240778, [], _240780)
^  Unify: (257) [user] subst_vars([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [_244516|_244518], [], _240780)
^  Call: (258) [user] subst_vars(:, _244516, [], _245456)
^  Unify: (258) [user] subst_vars(:, :, [], [])
   Call: (259) [system] var(:)
^  Redo: (258) [user] subst_vars(:, _244516, [], _245456)
^  Unify: (258) [user] subst_vars(:, _244516, [], _245456)
   Call: (259) [system] atom(:)
   Exit: (259) [system] atom(:)
^  Call: (259) [user] symbol_concat($, _251974, :)
^  Unify: (259) [user] symbol_concat($, _251974, :)
   Call: (260) [system] atom_concat($, _251974, :)
   Fail: (260) [system] atom_concat($, _251974, :)
^  Fail: (259) [user] symbol_concat($, _251974, :)
^  Redo: (258) [user] subst_vars(:, _244516, [], _245456)
^  Unify: (258) [user] subst_vars(:, _244516, [], _245456)
   Call: (259) [system] compound(:)
^  Redo: (258) [user] subst_vars(:, _244516, [], _245456)
^  Unify: (258) [user] subst_vars(:, :, [], [])
^  Exit: (258) [user] subst_vars(:, :, [], [])
^  Call: (258) [user] subst_vars(['if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _244518, [], _240780)
^  Unify: (258) [user] subst_vars(['if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], ['if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [], [])
   Call: (259) [system] var(['if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Redo: (258) [user] subst_vars(['if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _244518, [], _240780)
^  Unify: (258) [user] subst_vars(['if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [_265974|_265976], [], _240780)
^  Call: (259) [user] subst_vars('if-decons-expr', _265974, [], _266914)
^  Unify: (259) [user] subst_vars('if-decons-expr', 'if-decons-expr', [], [])
   Call: (260) [system] var('if-decons-expr')
^  Redo: (259) [user] subst_vars('if-decons-expr', _265974, [], _266914)
^  Unify: (259) [user] subst_vars('if-decons-expr', _265974, [], _266914)
   Call: (260) [system] atom('if-decons-expr')
   Exit: (260) [system] atom('if-decons-expr')
^  Call: (260) [user] symbol_concat($, _273432, 'if-decons-expr')
^  Unify: (260) [user] symbol_concat($, _273432, 'if-decons-expr')
   Call: (261) [system] atom_concat($, _273432, 'if-decons-expr')
   Fail: (261) [system] atom_concat($, _273432, 'if-decons-expr')
^  Fail: (260) [user] symbol_concat($, _273432, 'if-decons-expr')
^  Redo: (259) [user] subst_vars('if-decons-expr', _265974, [], _266914)
^  Unify: (259) [user] subst_vars('if-decons-expr', _265974, [], _266914)
   Call: (260) [system] compound('if-decons-expr')
^  Redo: (259) [user] subst_vars('if-decons-expr', _265974, [], _266914)
^  Unify: (259) [user] subst_vars('if-decons-expr', 'if-decons-expr', [], [])
^  Exit: (259) [user] subst_vars('if-decons-expr', 'if-decons-expr', [], [])
^  Call: (259) [user] subst_vars([[->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _265976, [], _240780)
^  Unify: (259) [user] subst_vars([[->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [[->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [], [])
   Call: (260) [system] var([[->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']])
^  Redo: (259) [user] subst_vars([[->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], _265976, [], _240780)
^  Unify: (259) [user] subst_vars([[->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [_287432|_287434], [], _240780)
^  Call: (260) [user] subst_vars([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _287432, [], _288372)
^  Unify: (260) [user] subst_vars([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], [], [])
   Call: (261) [system] var([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'])
^  Redo: (260) [user] subst_vars([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _287432, [], _288372)
^  Unify: (260) [user] subst_vars([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], [_292108|_292110], [], _288372)
^  Call: (261) [user] subst_vars(->, _292108, [], _293048)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
   Call: (262) [system] var(->)
^  Redo: (261) [user] subst_vars(->, _292108, [], _293048)
^  Unify: (261) [user] subst_vars(->, _292108, [], _293048)
   Call: (262) [system] atom(->)
   Exit: (262) [system] atom(->)
^  Call: (262) [user] symbol_concat($, _299566, ->)
^  Unify: (262) [user] symbol_concat($, _299566, ->)
   Call: (263) [system] atom_concat($, _299566, ->)
   Fail: (263) [system] atom_concat($, _299566, ->)
^  Fail: (262) [user] symbol_concat($, _299566, ->)
^  Redo: (261) [user] subst_vars(->, _292108, [], _293048)
^  Unify: (261) [user] subst_vars(->, _292108, [], _293048)
   Call: (262) [system] compound(->)
^  Redo: (261) [user] subst_vars(->, _292108, [], _293048)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
^  Exit: (261) [user] subst_vars(->, ->, [], [])
^  Call: (261) [user] subst_vars(['Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _292110, [], _288372)
^  Unify: (261) [user] subst_vars(['Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], ['Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], [], [])
   Call: (262) [system] var(['Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'])
^  Redo: (261) [user] subst_vars(['Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _292110, [], _288372)
^  Unify: (261) [user] subst_vars(['Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], [_313566|_313568], [], _288372)
^  Call: (262) [user] subst_vars('Expression', _313566, [], _314506)
^  Unify: (262) [user] subst_vars('Expression', 'Expression', [], [])
   Call: (263) [system] var('Expression')
^  Redo: (262) [user] subst_vars('Expression', _313566, [], _314506)
^  Unify: (262) [user] subst_vars('Expression', _313566, [], _314506)
   Call: (263) [system] atom('Expression')
   Exit: (263) [system] atom('Expression')
^  Call: (263) [user] symbol_concat($, _321024, 'Expression')
^  Unify: (263) [user] symbol_concat($, _321024, 'Expression')
   Call: (264) [system] atom_concat($, _321024, 'Expression')
   Fail: (264) [system] atom_concat($, _321024, 'Expression')
^  Fail: (263) [user] symbol_concat($, _321024, 'Expression')
^  Redo: (262) [user] subst_vars('Expression', _313566, [], _314506)
^  Unify: (262) [user] subst_vars('Expression', _313566, [], _314506)
   Call: (263) [system] compound('Expression')
^  Redo: (262) [user] subst_vars('Expression', _313566, [], _314506)
^  Unify: (262) [user] subst_vars('Expression', 'Expression', [], [])
^  Exit: (262) [user] subst_vars('Expression', 'Expression', [], [])
^  Call: (262) [user] subst_vars(['Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _313568, [], _288372)
^  Unify: (262) [user] subst_vars(['Variable', 'Variable', 'Atom', 'Atom', 'Atom'], ['Variable', 'Variable', 'Atom', 'Atom', 'Atom'], [], [])
   Call: (263) [system] var(['Variable', 'Variable', 'Atom', 'Atom', 'Atom'])
^  Redo: (262) [user] subst_vars(['Variable', 'Variable', 'Atom', 'Atom', 'Atom'], _313568, [], _288372)
^  Unify: (262) [user] subst_vars(['Variable', 'Variable', 'Atom', 'Atom', 'Atom'], [_335024|_335026], [], _288372)
^  Call: (263) [user] subst_vars('Variable', _335024, [], _335964)
^  Unify: (263) [user] subst_vars('Variable', 'Variable', [], [])
   Call: (264) [system] var('Variable')
^  Redo: (263) [user] subst_vars('Variable', _335024, [], _335964)
^  Unify: (263) [user] subst_vars('Variable', _335024, [], _335964)
   Call: (264) [system] atom('Variable')
   Exit: (264) [system] atom('Variable')
^  Call: (264) [user] symbol_concat($, _342482, 'Variable')
^  Unify: (264) [user] symbol_concat($, _342482, 'Variable')
   Call: (265) [system] atom_concat($, _342482, 'Variable')
   Fail: (265) [system] atom_concat($, _342482, 'Variable')
^  Fail: (264) [user] symbol_concat($, _342482, 'Variable')
^  Redo: (263) [user] subst_vars('Variable', _335024, [], _335964)
^  Unify: (263) [user] subst_vars('Variable', _335024, [], _335964)
   Call: (264) [system] compound('Variable')
^  Redo: (263) [user] subst_vars('Variable', _335024, [], _335964)
^  Unify: (263) [user] subst_vars('Variable', 'Variable', [], [])
^  Exit: (263) [user] subst_vars('Variable', 'Variable', [], [])
^  Call: (263) [user] subst_vars(['Variable', 'Atom', 'Atom', 'Atom'], _335026, [], _288372)
^  Unify: (263) [user] subst_vars(['Variable', 'Atom', 'Atom', 'Atom'], ['Variable', 'Atom', 'Atom', 'Atom'], [], [])
   Call: (264) [system] var(['Variable', 'Atom', 'Atom', 'Atom'])
^  Redo: (263) [user] subst_vars(['Variable', 'Atom', 'Atom', 'Atom'], _335026, [], _288372)
^  Unify: (263) [user] subst_vars(['Variable', 'Atom', 'Atom', 'Atom'], [_356482|_356484], [], _288372)
^  Call: (264) [user] subst_vars('Variable', _356482, [], _357422)
^  Unify: (264) [user] subst_vars('Variable', 'Variable', [], [])
   Call: (265) [system] var('Variable')
^  Redo: (264) [user] subst_vars('Variable', _356482, [], _357422)
^  Unify: (264) [user] subst_vars('Variable', _356482, [], _357422)
   Call: (265) [system] atom('Variable')
   Exit: (265) [system] atom('Variable')
^  Call: (265) [user] symbol_concat($, _363940, 'Variable')
^  Unify: (265) [user] symbol_concat($, _363940, 'Variable')
   Call: (266) [system] atom_concat($, _363940, 'Variable')
   Fail: (266) [system] atom_concat($, _363940, 'Variable')
^  Fail: (265) [user] symbol_concat($, _363940, 'Variable')
^  Redo: (264) [user] subst_vars('Variable', _356482, [], _357422)
^  Unify: (264) [user] subst_vars('Variable', _356482, [], _357422)
   Call: (265) [system] compound('Variable')
^  Redo: (264) [user] subst_vars('Variable', _356482, [], _357422)
^  Unify: (264) [user] subst_vars('Variable', 'Variable', [], [])
^  Exit: (264) [user] subst_vars('Variable', 'Variable', [], [])
^  Call: (264) [user] subst_vars(['Atom', 'Atom', 'Atom'], _356484, [], _288372)
^  Unify: (264) [user] subst_vars(['Atom', 'Atom', 'Atom'], ['Atom', 'Atom', 'Atom'], [], [])
   Call: (265) [system] var(['Atom', 'Atom', 'Atom'])
^  Redo: (264) [user] subst_vars(['Atom', 'Atom', 'Atom'], _356484, [], _288372)
^  Unify: (264) [user] subst_vars(['Atom', 'Atom', 'Atom'], [_377940|_377942], [], _288372)
^  Call: (265) [user] subst_vars('Atom', _377940, [], _378880)
^  Unify: (265) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (266) [system] var('Atom')
^  Redo: (265) [user] subst_vars('Atom', _377940, [], _378880)
^  Unify: (265) [user] subst_vars('Atom', _377940, [], _378880)
   Call: (266) [system] atom('Atom')
   Exit: (266) [system] atom('Atom')
^  Call: (266) [user] symbol_concat($, _385398, 'Atom')
^  Unify: (266) [user] symbol_concat($, _385398, 'Atom')
   Call: (267) [system] atom_concat($, _385398, 'Atom')
   Fail: (267) [system] atom_concat($, _385398, 'Atom')
^  Fail: (266) [user] symbol_concat($, _385398, 'Atom')
^  Redo: (265) [user] subst_vars('Atom', _377940, [], _378880)
^  Unify: (265) [user] subst_vars('Atom', _377940, [], _378880)
   Call: (266) [system] compound('Atom')
^  Redo: (265) [user] subst_vars('Atom', _377940, [], _378880)
^  Unify: (265) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (265) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (265) [user] subst_vars(['Atom', 'Atom'], _377942, [], _288372)
^  Unify: (265) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
   Call: (266) [system] var(['Atom', 'Atom'])
^  Redo: (265) [user] subst_vars(['Atom', 'Atom'], _377942, [], _288372)
^  Unify: (265) [user] subst_vars(['Atom', 'Atom'], [_399398|_399400], [], _288372)
^  Call: (266) [user] subst_vars('Atom', _399398, [], _400338)
^  Unify: (266) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (267) [system] var('Atom')
^  Redo: (266) [user] subst_vars('Atom', _399398, [], _400338)
^  Unify: (266) [user] subst_vars('Atom', _399398, [], _400338)
   Call: (267) [system] atom('Atom')
   Exit: (267) [system] atom('Atom')
^  Call: (267) [user] symbol_concat($, _406856, 'Atom')
^  Unify: (267) [user] symbol_concat($, _406856, 'Atom')
   Call: (268) [system] atom_concat($, _406856, 'Atom')
   Fail: (268) [system] atom_concat($, _406856, 'Atom')
^  Fail: (267) [user] symbol_concat($, _406856, 'Atom')
^  Redo: (266) [user] subst_vars('Atom', _399398, [], _400338)
^  Unify: (266) [user] subst_vars('Atom', _399398, [], _400338)
   Call: (267) [system] compound('Atom')
^  Redo: (266) [user] subst_vars('Atom', _399398, [], _400338)
^  Unify: (266) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (266) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (266) [user] subst_vars(['Atom'], _399400, [], _288372)
^  Unify: (266) [user] subst_vars(['Atom'], ['Atom'], [], [])
   Call: (267) [system] var(['Atom'])
^  Redo: (266) [user] subst_vars(['Atom'], _399400, [], _288372)
^  Unify: (266) [user] subst_vars(['Atom'], [_420856|_420858], [], _288372)
^  Call: (267) [user] subst_vars('Atom', _420856, [], _421796)
^  Unify: (267) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (268) [system] var('Atom')
^  Redo: (267) [user] subst_vars('Atom', _420856, [], _421796)
^  Unify: (267) [user] subst_vars('Atom', _420856, [], _421796)
   Call: (268) [system] atom('Atom')
   Exit: (268) [system] atom('Atom')
^  Call: (268) [user] symbol_concat($, _428314, 'Atom')
^  Unify: (268) [user] symbol_concat($, _428314, 'Atom')
   Call: (269) [system] atom_concat($, _428314, 'Atom')
   Fail: (269) [system] atom_concat($, _428314, 'Atom')
^  Fail: (268) [user] symbol_concat($, _428314, 'Atom')
^  Redo: (267) [user] subst_vars('Atom', _420856, [], _421796)
^  Unify: (267) [user] subst_vars('Atom', _420856, [], _421796)
   Call: (268) [system] compound('Atom')
^  Redo: (267) [user] subst_vars('Atom', _420856, [], _421796)
^  Unify: (267) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (267) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (267) [user] subst_vars([], _420858, [], _288372)
^  Unify: (267) [user] subst_vars([], [], [], [])
   Call: (268) [system] var([])
^  Redo: (267) [user] subst_vars([], _420858, [], _288372)
^  Unify: (267) [user] subst_vars([], [], [], [])
^  Exit: (267) [user] subst_vars([], [], [], [])
^  Exit: (266) [user] subst_vars(['Atom'], ['Atom'], [], [])
^  Exit: (265) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
^  Exit: (264) [user] subst_vars(['Atom', 'Atom', 'Atom'], ['Atom', 'Atom', 'Atom'], [], [])
^  Exit: (263) [user] subst_vars(['Variable', 'Atom', 'Atom', 'Atom'], ['Variable', 'Atom', 'Atom', 'Atom'], [], [])
^  Exit: (262) [user] subst_vars(['Variable', 'Variable', 'Atom', 'Atom', 'Atom'], ['Variable', 'Variable', 'Atom', 'Atom', 'Atom'], [], [])
^  Exit: (261) [user] subst_vars(['Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], ['Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], [], [])
^  Exit: (260) [user] subst_vars([->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom'], [], [])
^  Call: (260) [user] subst_vars([], _287434, [], _240780)
^  Unify: (260) [user] subst_vars([], [], [], [])
   Call: (261) [system] var([])
^  Redo: (260) [user] subst_vars([], _287434, [], _240780)
^  Unify: (260) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([], [], [], [])
^  Exit: (259) [user] subst_vars([[->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [[->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [], [])
^  Exit: (258) [user] subst_vars(['if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], ['if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [], [])
^  Exit: (257) [user] subst_vars([:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [], [])
   Call: (257) [system] _459148=metta_file_buffer(+, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(750, 25, 61, 750))
   Exit: (257) [system] metta_file_buffer(+, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(750, 25, 61, 750))=metta_file_buffer(+, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(750, 25, 61, 750))
^  Call: (257) [user] assertz(metta_file_buffer(+, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(750, 25, 61, 750)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(750, 25, 61, 750)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(750, 25, 61, 750))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(750, 25, 61, 750))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(750, 25, 61, 750))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'if-decons-expr', [->, 'Expression', 'Variable', 'Variable', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(750, 25, 61, 750))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
   Redo: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _509942)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _510880))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _510880)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 819)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _509942)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _509942)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_509942))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_5894))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_5894))
   Exit: (259) [system] nonvar(position(_5894))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(819, 27, 67, 819)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(819, 27, 67, 819))
   Call: (257) [user] current_read_mode(file, _12254)
   Unify: (257) [user] current_read_mode(file, _12254)
   Call: (258) [system] nb_current(file_mode, _12254)
   Redo: (257) [user] current_read_mode(file, _12254)
   Call: (258) [system] _12254=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _18704)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _18704)
^  Call: (258) [user] clause(t_l:s_reader_info(_18704), _20650, _20572)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _18704)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _18704)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _18704)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _18704)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _18704)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _18704)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _18704)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _18704)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _34480)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (260) [system] char_type('\n', space)
   Exit: (260) [system] char_type('\n', space)
   Call: (260) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (260) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _18704)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _18704)
   Call: (261) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _18704)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _18704)
   Call: (261) [system] peek_char((0x55aefe44e2f0), _44686)
   Exit: (261) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (261) [system] char_type('(', space)
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _18704)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _18704)
^  Call: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (262) [system] string((0x55aefe44e2f0))
^  Redo: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _18704)
^  Unify: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _18704)
^  Call: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _18704)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _18704)
   Call: (263) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _18704)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _18704)
   Call: (263) [system] peek_char((0x55aefe44e2f0), _60440)
   Exit: (263) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (263) [system] char_type('(', space)
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _18704)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _18704)
   Call: (263) [system] _65082=(0x55aefe44e2f0)
   Exit: (263) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (263) [user] once((read_position((0x55aefe44e2f0), _66950, _66952, _66954, _66956), read_sexpr((0x55aefe44e2f0), _66968), assertz(metta_file_comment(_66950, _66952, _66954, _66968, _66956))))
^  Unify: (263) [system] once(user:(read_position((0x55aefe44e2f0), _66950, _66952, _66954, _66956), read_sexpr((0x55aefe44e2f0), _66968), assertz(metta_file_comment(_66950, _66952, _66954, _66968, _66956))))
^  Call: (265) [user] read_position((0x55aefe44e2f0), _66950, _66952, _66954, _66956)
^  Unify: (265) [user] read_position((0x55aefe44e2f0), _66950, _66952, _66954, _66956)
   Call: (266) [system] stream_property((0x55aefe44e2f0), position(_66956))
   Unify: (266) [system] stream_property((0x55aefe44e2f0), position(_66956))
   Call: (267) [system] nonvar((0x55aefe44e2f0))
   Exit: (267) [system] nonvar((0x55aefe44e2f0))
   Call: (267) [system] nonvar(position(_66956))
   Exit: (267) [system] nonvar(position(_66956))
   Exit: (266) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(820, 28, 0, 820)))
   Call: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(820, 28, 0, 820), _66950)
   Unify: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(820, 28, 0, 820), _66950)
   Call: (267) [system] nonvar(line_count)
   Exit: (267) [system] nonvar(line_count)
   Call: (267) [$syspreds] stream_position_field(line_count, _80938)
   Unify: (267) [$syspreds] stream_position_field(line_count, 2)
   Exit: (267) [$syspreds] stream_position_field(line_count, 2)
   Call: (267) [system] arg(2, '$stream_position'(820, 28, 0, 820), _66950)
   Exit: (267) [system] arg(2, '$stream_position'(820, 28, 0, 820), 28)
   Exit: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(820, 28, 0, 820), 28)
   Call: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(820, 28, 0, 820), _66952)
   Unify: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(820, 28, 0, 820), _66952)
   Call: (267) [system] nonvar(line_position)
   Exit: (267) [system] nonvar(line_position)
   Call: (267) [$syspreds] stream_position_field(line_position, _90232)
   Unify: (267) [$syspreds] stream_position_field(line_position, 3)
   Exit: (267) [$syspreds] stream_position_field(line_position, 3)
   Call: (267) [system] arg(3, '$stream_position'(820, 28, 0, 820), _66952)
   Exit: (267) [system] arg(3, '$stream_position'(820, 28, 0, 820), 0)
   Exit: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(820, 28, 0, 820), 0)
   Call: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(820, 28, 0, 820), _66954)
   Unify: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(820, 28, 0, 820), _66954)
   Call: (267) [system] nonvar(char_count)
   Exit: (267) [system] nonvar(char_count)
   Call: (267) [$syspreds] stream_position_field(char_count, _99526)
   Unify: (267) [$syspreds] stream_position_field(char_count, 1)
   Exit: (267) [$syspreds] stream_position_field(char_count, 1)
   Call: (267) [system] arg(1, '$stream_position'(820, 28, 0, 820), _66954)
   Exit: (267) [system] arg(1, '$stream_position'(820, 28, 0, 820), 820)
   Exit: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(820, 28, 0, 820), 820)
^  Exit: (265) [user] read_position((0x55aefe44e2f0), 28, 0, 820, '$stream_position'(820, 28, 0, 820))
^  Call: (265) [user] read_sexpr((0x55aefe44e2f0), _66968)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _66968)
   Call: (266) [system] string((0x55aefe44e2f0))
^  Redo: (265) [user] read_sexpr((0x55aefe44e2f0), _66968)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _66968)
^  Call: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _66968)
^  Unify: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _66968)
^  Call: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _114396)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (268) [system] '('=(;)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', 'white')
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', end_of_line)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', space)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', cntrl)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (267) [system] get_char((0x55aefe44e2f0), _131180)
   Exit: (267) [system] get_char((0x55aefe44e2f0), '(')
   Call: (267) [system] '('='('
   Exit: (267) [system] '('='('
^  Call: (267) [user] read_list(')', (0x55aefe44e2f0), _66968)
^  Unify: (267) [user] read_list(')', (0x55aefe44e2f0), _66968)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _138606)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), =)
   Call: (269) [system] (=)=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space(=)
^  Unify: (269) [user] is_like_space(=)
   Call: (270) [system] char_type(=, 'white')
^  Redo: (269) [user] is_like_space(=)
^  Unify: (269) [user] is_like_space(=)
   Call: (270) [system] char_type(=, end_of_line)
^  Redo: (269) [user] is_like_space(=)
^  Unify: (269) [user] is_like_space(=)
   Call: (270) [system] char_type(=, space)
^  Redo: (269) [user] is_like_space(=)
^  Unify: (269) [user] is_like_space(=)
   Call: (270) [system] char_type(=, cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _155390)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), =)
   Call: (268) [system] (=)=')'
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _66968)
   Call: (268) [system] (=)=end_of_file
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _66968)
^  Call: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _160968)
^  Unify: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _160968)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _164682)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), =)
   Call: (270) [system] (=)=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(=)
^  Unify: (270) [user] is_like_space(=)
   Call: (271) [system] char_type(=, 'white')
^  Redo: (270) [user] is_like_space(=)
^  Unify: (270) [user] is_like_space(=)
   Call: (271) [system] char_type(=, end_of_line)
^  Redo: (270) [user] is_like_space(=)
^  Unify: (270) [user] is_like_space(=)
   Call: (271) [system] char_type(=, space)
^  Redo: (270) [user] is_like_space(=)
^  Unify: (270) [user] is_like_space(=)
   Call: (271) [system] char_type(=, cntrl)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] get_char((0x55aefe44e2f0), _181466)
   Exit: (269) [system] get_char((0x55aefe44e2f0), =)
   Call: (269) [system] (=)='('
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _160968)
   Call: (269) [system] (=)='['
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _160968)
   Call: (269) [system] (=)='{'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _160968)
   Call: (269) [system] (=)='"'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _160968)
   Call: (269) [system] (=)=!
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _160968)
   Call: (269) [system] (=)='\''
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _160968)
   Call: (269) [system] (=)='`'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _160968)
   Call: (269) [system] (=)=end_of_file
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _160968)
^  Call: (269) [user] read_symbolic(')', (0x55aefe44e2f0), =, _160968)
^  Unify: (269) [user] read_symbolic(')', (0x55aefe44e2f0), =, _160968)
^  Call: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _200076)
^  Unify: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _200076)
   Call: (271) [system] peek_char((0x55aefe44e2f0), _201942)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] is_delimiter(' ')
^  Unify: (271) [user] is_delimiter(' ')
   Call: (272) [system] char_type(' ', space)
   Exit: (272) [system] char_type(' ', space)
^  Exit: (271) [user] is_delimiter(' ')
   Call: (271) [system] _200076=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (270) [user] classify_and_convert_charseq(=, [], _160968)
^  Unify: (270) [user] classify_and_convert_charseq(=, [], _160968)
^  Call: (272) [system] setup_call_cleanup('$notrace'(_213108, _213110), once(user:catch(read_from_chars([=], _160968), _213084, fail)), '$restore_trace'(_213108, _213110))
^  Unify: (272) [system] setup_call_cleanup(system:'$notrace'(_213108, _213110), system:once(user:catch(read_from_chars([=], _160968), _213084, fail)), system:'$restore_trace'(_213108, _213110))
^  Call: (273) [system] sig_atomic(system:'$notrace'(_213108, _213110))
^  Exit: (272) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([=], =), _213084, fail)), system:'$restore_trace'(3, -1))
   Call: (271) [system] atomic(=)
   Exit: (271) [system] atomic(=)
^  Exit: (270) [user] classify_and_convert_charseq(=, [], =)
^  Exit: (269) [user] read_symbolic(')', (0x55aefe44e2f0), =, =)
^  Exit: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), =)
^  Call: (268) [user] read_list(')', (0x55aefe44e2f0), _221546)
^  Unify: (268) [user] read_list(')', (0x55aefe44e2f0), _221546)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _225260)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (270) [system] ' '=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(' ')
^  Unify: (270) [user] is_like_space(' ')
   Call: (271) [system] char_type(' ', 'white')
   Exit: (271) [system] char_type(' ', 'white')
^  Exit: (270) [user] is_like_space(' ')
   Call: (270) [system] get_char((0x55aefe44e2f0), _233918)
   Exit: (270) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _237546)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', 'white')
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', end_of_line)
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', space)
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _255254)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (269) [system] '('=')'
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _221546)
   Call: (269) [system] '('=end_of_file
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _221546)
^  Call: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _260832)
^  Unify: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _260832)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _264546)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', 'white')
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', end_of_line)
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', space)
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] get_char((0x55aefe44e2f0), _281330)
   Exit: (270) [system] get_char((0x55aefe44e2f0), '(')
   Call: (270) [system] '('='('
   Exit: (270) [system] '('='('
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _260832)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _260832)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _288756)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), i)
   Call: (272) [system] i=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, 'white')
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, end_of_line)
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, space)
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _305540)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), i)
   Call: (271) [system] i=')'
^  Redo: (270) [user] read_list(')', (0x55aefe44e2f0), _260832)
   Call: (271) [system] i=end_of_file
^  Redo: (270) [user] read_list(')', (0x55aefe44e2f0), _260832)
^  Call: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _311118)
^  Unify: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _311118)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _314832)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), i)
   Call: (273) [system] i=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(i)
^  Unify: (273) [user] is_like_space(i)
   Call: (274) [system] char_type(i, 'white')
^  Redo: (273) [user] is_like_space(i)
^  Unify: (273) [user] is_like_space(i)
   Call: (274) [system] char_type(i, end_of_line)
^  Redo: (273) [user] is_like_space(i)
^  Unify: (273) [user] is_like_space(i)
   Call: (274) [system] char_type(i, space)
^  Redo: (273) [user] is_like_space(i)
^  Unify: (273) [user] is_like_space(i)
   Call: (274) [system] char_type(i, cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] get_char((0x55aefe44e2f0), _331616)
   Exit: (272) [system] get_char((0x55aefe44e2f0), i)
   Call: (272) [system] i='('
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _311118)
   Call: (272) [system] i='['
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _311118)
   Call: (272) [system] i='{'
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _311118)
   Call: (272) [system] i='"'
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _311118)
   Call: (272) [system] i=!
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _311118)
   Call: (272) [system] i='\''
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _311118)
   Call: (272) [system] i='`'
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _311118)
   Call: (272) [system] i=end_of_file
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _311118)
^  Call: (272) [user] read_symbolic(')', (0x55aefe44e2f0), i, _311118)
^  Unify: (272) [user] read_symbolic(')', (0x55aefe44e2f0), i, _311118)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _350226)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _350226)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _352092)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), f)
^  Call: (274) [user] is_delimiter(f)
^  Unify: (274) [user] is_delimiter(f)
   Call: (275) [system] char_type(f, space)
^  Redo: (274) [user] is_delimiter(f)
   Call: (275) [system] arg(_357732, v('(', ')', end_of_file), f)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _350226)
   Call: (274) [system] ')'==f
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _350226)
   Call: (274) [system] get_char((0x55aefe44e2f0), f)
   Exit: (274) [system] get_char((0x55aefe44e2f0), f)
   Call: (274) [system] f=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _350226)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _365098)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _365098)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _366964)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), -)
^  Call: (275) [user] is_delimiter(-)
^  Unify: (275) [user] is_delimiter(-)
   Call: (276) [system] char_type(-, space)
^  Redo: (275) [user] is_delimiter(-)
   Call: (276) [system] arg(_372604, v('(', ')', end_of_file), -)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _365098)
   Call: (275) [system] ')'==(-)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _365098)
   Call: (275) [system] get_char((0x55aefe44e2f0), -)
   Exit: (275) [system] get_char((0x55aefe44e2f0), -)
   Call: (275) [system] (-)=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _365098)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _379970)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _379970)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _381836)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), d)
^  Call: (276) [user] is_delimiter(d)
^  Unify: (276) [user] is_delimiter(d)
   Call: (277) [system] char_type(d, space)
^  Redo: (276) [user] is_delimiter(d)
   Call: (277) [system] arg(_387476, v('(', ')', end_of_file), d)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _379970)
   Call: (276) [system] ')'==d
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _379970)
   Call: (276) [system] get_char((0x55aefe44e2f0), d)
   Exit: (276) [system] get_char((0x55aefe44e2f0), d)
   Call: (276) [system] d=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _379970)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _394842)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _394842)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _396708)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (277) [user] is_delimiter(e)
^  Unify: (277) [user] is_delimiter(e)
   Call: (278) [system] char_type(e, space)
^  Redo: (277) [user] is_delimiter(e)
   Call: (278) [system] arg(_402348, v('(', ')', end_of_file), e)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _394842)
   Call: (277) [system] ')'==e
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _394842)
   Call: (277) [system] get_char((0x55aefe44e2f0), e)
   Exit: (277) [system] get_char((0x55aefe44e2f0), e)
   Call: (277) [system] e=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _394842)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _409714)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _409714)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _411580)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), c)
^  Call: (278) [user] is_delimiter(c)
^  Unify: (278) [user] is_delimiter(c)
   Call: (279) [system] char_type(c, space)
^  Redo: (278) [user] is_delimiter(c)
   Call: (279) [system] arg(_417220, v('(', ')', end_of_file), c)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _409714)
   Call: (278) [system] ')'==c
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _409714)
   Call: (278) [system] get_char((0x55aefe44e2f0), c)
   Exit: (278) [system] get_char((0x55aefe44e2f0), c)
   Call: (278) [system] c=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _409714)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _424586)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _424586)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _426452)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (279) [user] is_delimiter(o)
^  Unify: (279) [user] is_delimiter(o)
   Call: (280) [system] char_type(o, space)
^  Redo: (279) [user] is_delimiter(o)
   Call: (280) [system] arg(_432092, v('(', ')', end_of_file), o)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _424586)
   Call: (279) [system] ')'==o
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _424586)
   Call: (279) [system] get_char((0x55aefe44e2f0), o)
   Exit: (279) [system] get_char((0x55aefe44e2f0), o)
   Call: (279) [system] o=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _424586)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _439458)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _439458)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _441324)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (280) [user] is_delimiter(n)
^  Unify: (280) [user] is_delimiter(n)
   Call: (281) [system] char_type(n, space)
^  Redo: (280) [user] is_delimiter(n)
   Call: (281) [system] arg(_446964, v('(', ')', end_of_file), n)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _439458)
   Call: (280) [system] ')'==n
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _439458)
   Call: (280) [system] get_char((0x55aefe44e2f0), n)
   Exit: (280) [system] get_char((0x55aefe44e2f0), n)
   Call: (280) [system] n=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _439458)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _454330)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _454330)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _456196)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (281) [user] is_delimiter(s)
^  Unify: (281) [user] is_delimiter(s)
   Call: (282) [system] char_type(s, space)
^  Redo: (281) [user] is_delimiter(s)
   Call: (282) [system] arg(_461836, v('(', ')', end_of_file), s)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _454330)
   Call: (281) [system] ')'==s
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _454330)
   Call: (281) [system] get_char((0x55aefe44e2f0), s)
   Exit: (281) [system] get_char((0x55aefe44e2f0), s)
   Call: (281) [system] s=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _454330)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _469202)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _469202)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _471068)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), -)
^  Call: (282) [user] is_delimiter(-)
^  Unify: (282) [user] is_delimiter(-)
   Call: (283) [system] char_type(-, space)
^  Redo: (282) [user] is_delimiter(-)
   Call: (283) [system] arg(_476708, v('(', ')', end_of_file), -)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _469202)
   Call: (282) [system] ')'==(-)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _469202)
   Call: (282) [system] get_char((0x55aefe44e2f0), -)
   Exit: (282) [system] get_char((0x55aefe44e2f0), -)
   Call: (282) [system] (-)=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _469202)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _484074)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _484074)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _485940)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (283) [user] is_delimiter(e)
^  Unify: (283) [user] is_delimiter(e)
   Call: (284) [system] char_type(e, space)
^  Redo: (283) [user] is_delimiter(e)
   Call: (284) [system] arg(_491580, v('(', ')', end_of_file), e)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _484074)
   Call: (283) [system] ')'==e
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _484074)
   Call: (283) [system] get_char((0x55aefe44e2f0), e)
   Exit: (283) [system] get_char((0x55aefe44e2f0), e)
   Call: (283) [system] e=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _484074)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _498946)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _498946)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _500812)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), x)
^  Call: (284) [user] is_delimiter(x)
^  Unify: (284) [user] is_delimiter(x)
   Call: (285) [system] char_type(x, space)
^  Redo: (284) [user] is_delimiter(x)
   Call: (285) [system] arg(_506452, v('(', ')', end_of_file), x)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _498946)
   Call: (284) [system] ')'==x
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _498946)
   Call: (284) [system] get_char((0x55aefe44e2f0), x)
   Exit: (284) [system] get_char((0x55aefe44e2f0), x)
   Call: (284) [system] x=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _498946)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _513818)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _513818)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _515684)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (285) [user] is_delimiter(p)
^  Unify: (285) [user] is_delimiter(p)
   Call: (286) [system] char_type(p, space)
^  Redo: (285) [user] is_delimiter(p)
   Call: (286) [system] arg(_521324, v('(', ')', end_of_file), p)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _513818)
   Call: (285) [system] ')'==p
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6040)
   Call: (285) [system] get_char((0x55aefe44e2f0), p)
   Exit: (285) [system] get_char((0x55aefe44e2f0), p)
   Call: (285) [system] p=(\)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6040)
^  Call: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _10638)
^  Unify: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _10638)
   Call: (286) [system] peek_char((0x55aefe44e2f0), _12504)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (286) [user] is_delimiter(r)
^  Unify: (286) [user] is_delimiter(r)
   Call: (287) [system] char_type(r, space)
^  Redo: (286) [user] is_delimiter(r)
   Call: (287) [system] arg(_18144, v('(', ')', end_of_file), r)
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _10638)
   Call: (286) [system] ')'==r
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _10638)
   Call: (286) [system] get_char((0x55aefe44e2f0), r)
   Exit: (286) [system] get_char((0x55aefe44e2f0), r)
   Call: (286) [system] r=(\)
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _10638)
^  Call: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _25510)
^  Unify: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _25510)
   Call: (287) [system] peek_char((0x55aefe44e2f0), _27376)
   Exit: (287) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (287) [user] is_delimiter(' ')
^  Unify: (287) [user] is_delimiter(' ')
   Call: (288) [system] char_type(' ', space)
   Exit: (288) [system] char_type(' ', space)
^  Exit: (287) [user] is_delimiter(' ')
   Call: (287) [system] _25510=[]
   Exit: (287) [system] []=[]
^  Exit: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (286) [system] _10638=[r]
   Exit: (286) [system] [r]=[r]
^  Exit: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r])
   Call: (285) [system] _6040=[p, r]
   Exit: (285) [system] [p, r]=[p, r]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, r])
   Call: (284) [system] _6036=[x, p, r]
   Exit: (284) [system] [x, p, r]=[x, p, r]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [x, p, r])
   Call: (283) [system] _6032=[e, x, p, r]
   Exit: (283) [system] [e, x, p, r]=[e, x, p, r]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, x, p, r])
   Call: (282) [system] _6028=[-, e, x, p, r]
   Exit: (282) [system] [-, e, x, p, r]=[-, e, x, p, r]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [-, e, x, p, r])
   Call: (281) [system] _6024=[s, -, e, x, p, r]
   Exit: (281) [system] [s, -, e, x, p, r]=[s, -, e, x, p, r]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, -, e, x, p, r])
   Call: (280) [system] _6020=[n, s, -, e, x, p, r]
   Exit: (280) [system] [n, s, -, e, x, p, r]=[n, s, -, e, x, p, r]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n, s, -, e, x, p, r])
   Call: (279) [system] _6016=[o, n, s, -, e, x, p, r]
   Exit: (279) [system] [o, n, s, -, e, x, p, r]=[o, n, s, -, e, x, p, r]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, n, s, -, e, x, p, r])
   Call: (278) [system] _6012=[c, o, n, s, -, e, x, p, r]
   Exit: (278) [system] [c, o, n, s, -, e, x, p, r]=[c, o, n, s, -, e, x, p, r]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [c, o, n, s, -, e, x, p, r])
   Call: (277) [system] _6008=[e, c, o, n, s, -, e, x, p, r]
   Exit: (277) [system] [e, c, o, n, s, -, e, x, p, r]=[e, c, o, n, s, -, e, x, p, r]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, c, o, n, s, -, e, x, p, r])
   Call: (276) [system] _6004=[d, e, c, o, n, s, -, e, x, p, r]
   Exit: (276) [system] [d, e, c, o, n, s, -, e, x, p, r]=[d, e, c, o, n, s, -, e, x, p, r]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [d, e, c, o, n, s, -, e, x, p, r])
   Call: (275) [system] _6000=[-, d, e, c, o, n, s, -, e, x, p, r]
   Exit: (275) [system] [-, d, e, c, o, n, s, -, e, x, p, r]=[-, d, e, c, o, n, s, -, e, x, p, r]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [-, d, e, c, o, n, s, -, e, x, p, r])
   Call: (274) [system] _5996=[f, -, d, e, c, o, n, s, -, e, x, p, r]
   Exit: (274) [system] [f, -, d, e, c, o, n, s, -, e, x, p, r]=[f, -, d, e, c, o, n, s, -, e, x, p, r]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [f, -, d, e, c, o, n, s, -, e, x, p, r])
^  Call: (273) [user] classify_and_convert_charseq(i, [f, -, d, e, c, o, n, s, -, e, x, p, r], _5992)
^  Unify: (273) [user] classify_and_convert_charseq(i, [f, -, d, e, c, o, n, s, -, e, x, p, r], _5992)
^  Call: (275) [system] setup_call_cleanup('$notrace'(_74864, _74866), once(user:catch(read_from_chars([i, f, -, d, e, c, o, n, s, -, e, x, p, r], _5992), _74840, fail)), '$restore_trace'(_74864, _74866))
^  Unify: (275) [system] setup_call_cleanup(system:'$notrace'(_74864, _74866), system:once(user:catch(read_from_chars([i, f, -, d, e, c, o, n, s, -, e, x, p, r], _5992), _74840, fail)), system:'$restore_trace'(_74864, _74866))
^  Call: (276) [system] sig_atomic(system:'$notrace'(_74864, _74866))
^  Exit: (275) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([i, f, -, d, e, c, o, n, s, -, e, x, p, r], if-decons-expr), _74840, fail)), system:'$restore_trace'(3, -1))
   Call: (274) [system] atomic(if-decons-expr)
^  Redo: (273) [user] classify_and_convert_charseq(i, [f, -, d, e, c, o, n, s, -, e, x, p, r], _5992)
^  Unify: (273) [user] classify_and_convert_charseq(i, [f, -, d, e, c, o, n, s, -, e, x, p, r], _5992)
   Call: (274) [system] atom_chars(_5992, [i, f, -, d, e, c, o, n, s, -, e, x, p, r])
   Exit: (274) [system] atom_chars('if-decons-expr', [i, f, -, d, e, c, o, n, s, -, e, x, p, r])
^  Exit: (273) [user] classify_and_convert_charseq(i, [f, -, d, e, c, o, n, s, -, e, x, p, r], 'if-decons-expr')
^  Exit: (272) [user] read_symbolic(')', (0x55aefe44e2f0), i, 'if-decons-expr')
^  Exit: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), 'if-decons-expr')
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _86116)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _86116)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _89830)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (273) [system] ' '=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(' ')
^  Unify: (273) [user] is_like_space(' ')
   Call: (274) [system] char_type(' ', 'white')
   Exit: (274) [system] char_type(' ', 'white')
^  Exit: (273) [user] is_like_space(' ')
   Call: (273) [system] get_char((0x55aefe44e2f0), _98488)
   Exit: (273) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _102116)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), $)
   Call: (274) [system] ($)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, 'white')
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, end_of_line)
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, space)
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _119824)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), $)
   Call: (272) [system] ($)=')'
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _86116)
   Call: (272) [system] ($)=end_of_file
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _86116)
^  Call: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _125402)
^  Unify: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _125402)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _129116)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), $)
   Call: (274) [system] ($)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, 'white')
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, end_of_line)
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, space)
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] get_char((0x55aefe44e2f0), _145900)
   Exit: (273) [system] get_char((0x55aefe44e2f0), $)
   Call: (273) [system] ($)='('
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _125402)
   Call: (273) [system] ($)='['
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _125402)
   Call: (273) [system] ($)='{'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _125402)
   Call: (273) [system] ($)='"'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _125402)
   Call: (273) [system] ($)=!
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _125402)
   Call: (273) [system] ($)='\''
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _125402)
   Call: (273) [system] ($)='`'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _125402)
   Call: (273) [system] ($)=end_of_file
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _125402)
^  Call: (273) [user] read_symbolic(')', (0x55aefe44e2f0), $, _125402)
^  Unify: (273) [user] read_symbolic(')', (0x55aefe44e2f0), $, _125402)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _164510)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _164510)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _166376)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (275) [user] is_delimiter(a)
^  Unify: (275) [user] is_delimiter(a)
   Call: (276) [system] char_type(a, space)
^  Redo: (275) [user] is_delimiter(a)
   Call: (276) [system] arg(_172016, v('(', ')', end_of_file), a)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _164510)
   Call: (275) [system] ')'==a
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _164510)
   Call: (275) [system] get_char((0x55aefe44e2f0), a)
   Exit: (275) [system] get_char((0x55aefe44e2f0), a)
   Call: (275) [system] a=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _164510)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _179382)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _179382)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _181248)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (276) [user] is_delimiter(t)
^  Unify: (276) [user] is_delimiter(t)
   Call: (277) [system] char_type(t, space)
^  Redo: (276) [user] is_delimiter(t)
   Call: (277) [system] arg(_186888, v('(', ')', end_of_file), t)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _179382)
   Call: (276) [system] ')'==t
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _179382)
   Call: (276) [system] get_char((0x55aefe44e2f0), t)
   Exit: (276) [system] get_char((0x55aefe44e2f0), t)
   Call: (276) [system] t=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _179382)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _194254)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _194254)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _196120)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (277) [user] is_delimiter(o)
^  Unify: (277) [user] is_delimiter(o)
   Call: (278) [system] char_type(o, space)
^  Redo: (277) [user] is_delimiter(o)
   Call: (278) [system] arg(_201760, v('(', ')', end_of_file), o)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _194254)
   Call: (277) [system] ')'==o
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _194254)
   Call: (277) [system] get_char((0x55aefe44e2f0), o)
   Exit: (277) [system] get_char((0x55aefe44e2f0), o)
   Call: (277) [system] o=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _194254)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _209126)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _209126)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _210992)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (278) [user] is_delimiter(m)
^  Unify: (278) [user] is_delimiter(m)
   Call: (279) [system] char_type(m, space)
^  Redo: (278) [user] is_delimiter(m)
   Call: (279) [system] arg(_216632, v('(', ')', end_of_file), m)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _209126)
   Call: (278) [system] ')'==m
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _209126)
   Call: (278) [system] get_char((0x55aefe44e2f0), m)
   Exit: (278) [system] get_char((0x55aefe44e2f0), m)
   Call: (278) [system] m=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _209126)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _223998)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _223998)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _225864)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (279) [user] is_delimiter(' ')
^  Unify: (279) [user] is_delimiter(' ')
   Call: (280) [system] char_type(' ', space)
   Exit: (280) [system] char_type(' ', space)
^  Exit: (279) [user] is_delimiter(' ')
   Call: (279) [system] _223998=[]
   Exit: (279) [system] []=[]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (278) [system] _209126=[m]
   Exit: (278) [system] [m]=[m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (277) [system] _194254=[o, m]
   Exit: (277) [system] [o, m]=[o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (276) [system] _179382=[t, o, m]
   Exit: (276) [system] [t, o, m]=[t, o, m]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
   Call: (275) [system] _164510=[a, t, o, m]
   Exit: (275) [system] [a, t, o, m]=[a, t, o, m]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, t, o, m])
^  Call: (274) [user] classify_and_convert_charseq($, [a, t, o, m], _125402)
^  Unify: (274) [user] classify_and_convert_charseq($, [a, t, o, m], '$VAR'(_247248))
   Call: (275) [system] atom_chars(_247248, ['_', a, t, o, m])
   Exit: (275) [system] atom_chars('_atom', ['_', a, t, o, m])
^  Exit: (274) [user] classify_and_convert_charseq($, [a, t, o, m], _atom)
^  Exit: (273) [user] read_symbolic(')', (0x55aefe44e2f0), $, _atom)
^  Exit: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _atom)
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _252844)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _252844)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _256558)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (274) [system] ' '=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(' ')
^  Unify: (274) [user] is_like_space(' ')
   Call: (275) [system] char_type(' ', 'white')
   Exit: (275) [system] char_type(' ', 'white')
^  Exit: (274) [user] is_like_space(' ')
   Call: (274) [system] get_char((0x55aefe44e2f0), _265216)
   Exit: (274) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _268844)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), $)
   Call: (275) [system] ($)=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, 'white')
^  Redo: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, end_of_line)
^  Redo: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, space)
^  Redo: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _286552)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), $)
   Call: (273) [system] ($)=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _252844)
   Call: (273) [system] ($)=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _252844)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _292130)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _292130)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _295844)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), $)
   Call: (275) [system] ($)=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, 'white')
^  Redo: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, end_of_line)
^  Redo: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, space)
^  Redo: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _312628)
   Exit: (274) [system] get_char((0x55aefe44e2f0), $)
   Call: (274) [system] ($)='('
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _292130)
   Call: (274) [system] ($)='['
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _292130)
   Call: (274) [system] ($)='{'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _292130)
   Call: (274) [system] ($)='"'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _292130)
   Call: (274) [system] ($)=!
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _292130)
   Call: (274) [system] ($)='\''
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _292130)
   Call: (274) [system] ($)='`'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _292130)
   Call: (274) [system] ($)=end_of_file
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _292130)
^  Call: (274) [user] read_symbolic(')', (0x55aefe44e2f0), $, _292130)
^  Unify: (274) [user] read_symbolic(')', (0x55aefe44e2f0), $, _292130)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _331238)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _331238)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _333104)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), h)
^  Call: (276) [user] is_delimiter(h)
^  Unify: (276) [user] is_delimiter(h)
   Call: (277) [system] char_type(h, space)
^  Redo: (276) [user] is_delimiter(h)
   Call: (277) [system] arg(_338744, v('(', ')', end_of_file), h)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _331238)
   Call: (276) [system] ')'==h
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _331238)
   Call: (276) [system] get_char((0x55aefe44e2f0), h)
   Exit: (276) [system] get_char((0x55aefe44e2f0), h)
   Call: (276) [system] h=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _331238)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _346110)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _346110)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _347976)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (277) [user] is_delimiter(e)
^  Unify: (277) [user] is_delimiter(e)
   Call: (278) [system] char_type(e, space)
^  Redo: (277) [user] is_delimiter(e)
   Call: (278) [system] arg(_353616, v('(', ')', end_of_file), e)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _346110)
   Call: (277) [system] ')'==e
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _346110)
   Call: (277) [system] get_char((0x55aefe44e2f0), e)
   Exit: (277) [system] get_char((0x55aefe44e2f0), e)
   Call: (277) [system] e=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _346110)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _360982)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _360982)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _362848)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (278) [user] is_delimiter(a)
^  Unify: (278) [user] is_delimiter(a)
   Call: (279) [system] char_type(a, space)
^  Redo: (278) [user] is_delimiter(a)
   Call: (279) [system] arg(_368488, v('(', ')', end_of_file), a)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _360982)
   Call: (278) [system] ')'==a
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _360982)
   Call: (278) [system] get_char((0x55aefe44e2f0), a)
   Exit: (278) [system] get_char((0x55aefe44e2f0), a)
   Call: (278) [system] a=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _360982)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _375854)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _375854)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _377720)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), d)
^  Call: (279) [user] is_delimiter(d)
^  Unify: (279) [user] is_delimiter(d)
   Call: (280) [system] char_type(d, space)
^  Redo: (279) [user] is_delimiter(d)
   Call: (280) [system] arg(_383360, v('(', ')', end_of_file), d)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _375854)
   Call: (279) [system] ')'==d
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _375854)
   Call: (279) [system] get_char((0x55aefe44e2f0), d)
   Exit: (279) [system] get_char((0x55aefe44e2f0), d)
   Call: (279) [system] d=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _375854)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _390726)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _390726)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _392592)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (280) [user] is_delimiter(' ')
^  Unify: (280) [user] is_delimiter(' ')
   Call: (281) [system] char_type(' ', space)
   Exit: (281) [system] char_type(' ', space)
^  Exit: (280) [user] is_delimiter(' ')
   Call: (280) [system] _390726=[]
   Exit: (280) [system] []=[]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (279) [system] _375854=[d]
   Exit: (279) [system] [d]=[d]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [d])
   Call: (278) [system] _360982=[a, d]
   Exit: (278) [system] [a, d]=[a, d]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, d])
   Call: (277) [system] _346110=[e, a, d]
   Exit: (277) [system] [e, a, d]=[e, a, d]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, a, d])
   Call: (276) [system] _331238=[h, e, a, d]
   Exit: (276) [system] [h, e, a, d]=[h, e, a, d]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [h, e, a, d])
^  Call: (275) [user] classify_and_convert_charseq($, [h, e, a, d], _292130)
^  Unify: (275) [user] classify_and_convert_charseq($, [h, e, a, d], '$VAR'(_413976))
   Call: (276) [system] atom_chars(_413976, ['_', h, e, a, d])
   Exit: (276) [system] atom_chars('_head', ['_', h, e, a, d])
^  Exit: (275) [user] classify_and_convert_charseq($, [h, e, a, d], _head)
^  Exit: (274) [user] read_symbolic(')', (0x55aefe44e2f0), $, _head)
^  Exit: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _head)
^  Call: (273) [user] read_list(')', (0x55aefe44e2f0), _419572)
^  Unify: (273) [user] read_list(')', (0x55aefe44e2f0), _419572)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _423286)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (275) [system] ' '=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(' ')
^  Unify: (275) [user] is_like_space(' ')
   Call: (276) [system] char_type(' ', 'white')
   Exit: (276) [system] char_type(' ', 'white')
^  Exit: (275) [user] is_like_space(' ')
   Call: (275) [system] get_char((0x55aefe44e2f0), _431944)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _435572)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), $)
   Call: (276) [system] ($)=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, 'white')
^  Redo: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, end_of_line)
^  Redo: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, space)
^  Redo: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _453280)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), $)
   Call: (274) [system] ($)=')'
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _419572)
   Call: (274) [system] ($)=end_of_file
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _419572)
^  Call: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _458858)
^  Unify: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _458858)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _462572)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), $)
   Call: (276) [system] ($)=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, 'white')
^  Redo: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, end_of_line)
^  Redo: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, space)
^  Redo: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] get_char((0x55aefe44e2f0), _479356)
   Exit: (275) [system] get_char((0x55aefe44e2f0), $)
   Call: (275) [system] ($)='('
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _458858)
   Call: (275) [system] ($)='['
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _458858)
   Call: (275) [system] ($)='{'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _458858)
   Call: (275) [system] ($)='"'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _458858)
   Call: (275) [system] ($)=!
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _458858)
   Call: (275) [system] ($)='\''
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _458858)
   Call: (275) [system] ($)='`'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _458858)
   Call: (275) [system] ($)=end_of_file
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _458858)
^  Call: (275) [user] read_symbolic(')', (0x55aefe44e2f0), $, _458858)
^  Unify: (275) [user] read_symbolic(')', (0x55aefe44e2f0), $, _458858)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _497966)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _497966)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _499832)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (277) [user] is_delimiter(t)
^  Unify: (277) [user] is_delimiter(t)
   Call: (278) [system] char_type(t, space)
^  Redo: (277) [user] is_delimiter(t)
   Call: (278) [system] arg(_505472, v('(', ')', end_of_file), t)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _497966)
   Call: (277) [system] ')'==t
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _497966)
   Call: (277) [system] get_char((0x55aefe44e2f0), t)
   Exit: (277) [system] get_char((0x55aefe44e2f0), t)
   Call: (277) [system] t=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _497966)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _512838)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _512838)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _514704)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (278) [user] is_delimiter(a)
^  Unify: (278) [user] is_delimiter(a)
   Call: (279) [system] char_type(a, space)
^  Redo: (278) [user] is_delimiter(a)
   Call: (279) [system] arg(_520344, v('(', ')', end_of_file), a)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _512838)
   Call: (278) [system] ')'==a
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _512838)
   Call: (278) [system] get_char((0x55aefe44e2f0), a)
   Exit: (278) [system] get_char((0x55aefe44e2f0), a)
   Call: (278) [system] a=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6026)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _9694)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _9694)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _11560)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (279) [user] is_delimiter(i)
^  Unify: (279) [user] is_delimiter(i)
   Call: (280) [system] char_type(i, space)
^  Redo: (279) [user] is_delimiter(i)
   Call: (280) [system] arg(_17200, v('(', ')', end_of_file), i)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _9694)
   Call: (279) [system] ')'==i
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _9694)
   Call: (279) [system] get_char((0x55aefe44e2f0), i)
   Exit: (279) [system] get_char((0x55aefe44e2f0), i)
   Call: (279) [system] i=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _9694)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _24566)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _24566)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _26432)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (280) [user] is_delimiter(l)
^  Unify: (280) [user] is_delimiter(l)
   Call: (281) [system] char_type(l, space)
^  Redo: (280) [user] is_delimiter(l)
   Call: (281) [system] arg(_32072, v('(', ')', end_of_file), l)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _24566)
   Call: (280) [system] ')'==l
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _24566)
   Call: (280) [system] get_char((0x55aefe44e2f0), l)
   Exit: (280) [system] get_char((0x55aefe44e2f0), l)
   Call: (280) [system] l=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _24566)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _39438)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _39438)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _41304)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (281) [user] is_delimiter(' ')
^  Unify: (281) [user] is_delimiter(' ')
   Call: (282) [system] char_type(' ', space)
   Exit: (282) [system] char_type(' ', space)
^  Exit: (281) [user] is_delimiter(' ')
   Call: (281) [system] _39438=[]
   Exit: (281) [system] []=[]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (280) [system] _24566=[l]
   Exit: (280) [system] [l]=[l]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l])
   Call: (279) [system] _9694=[i, l]
   Exit: (279) [system] [i, l]=[i, l]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, l])
   Call: (278) [system] _6026=[a, i, l]
   Exit: (278) [system] [a, i, l]=[a, i, l]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, i, l])
   Call: (277) [system] _6022=[t, a, i, l]
   Exit: (277) [system] [t, a, i, l]=[t, a, i, l]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, a, i, l])
^  Call: (276) [user] classify_and_convert_charseq($, [t, a, i, l], _6018)
^  Unify: (276) [user] classify_and_convert_charseq($, [t, a, i, l], '$VAR'(_62688))
   Call: (277) [system] atom_chars(_62688, ['_', t, a, i, l])
   Exit: (277) [system] atom_chars('_tail', ['_', t, a, i, l])
^  Exit: (276) [user] classify_and_convert_charseq($, [t, a, i, l], _tail)
^  Exit: (275) [user] read_symbolic(')', (0x55aefe44e2f0), $, _tail)
^  Exit: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _tail)
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _68284)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _68284)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _71998)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (276) [system] ' '=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(' ')
^  Unify: (276) [user] is_like_space(' ')
   Call: (277) [system] char_type(' ', 'white')
   Exit: (277) [system] char_type(' ', 'white')
^  Exit: (276) [user] is_like_space(' ')
   Call: (276) [system] get_char((0x55aefe44e2f0), _80656)
   Exit: (276) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _84284)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), $)
   Call: (277) [system] ($)=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space($)
^  Unify: (277) [user] is_like_space($)
   Call: (278) [system] char_type($, 'white')
^  Redo: (277) [user] is_like_space($)
^  Unify: (277) [user] is_like_space($)
   Call: (278) [system] char_type($, end_of_line)
^  Redo: (277) [user] is_like_space($)
^  Unify: (277) [user] is_like_space($)
   Call: (278) [system] char_type($, space)
^  Redo: (277) [user] is_like_space($)
^  Unify: (277) [user] is_like_space($)
   Call: (278) [system] char_type($, cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _101992)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), $)
   Call: (275) [system] ($)=')'
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _68284)
   Call: (275) [system] ($)=end_of_file
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _68284)
^  Call: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _107570)
^  Unify: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _107570)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _111284)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), $)
   Call: (277) [system] ($)=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space($)
^  Unify: (277) [user] is_like_space($)
   Call: (278) [system] char_type($, 'white')
^  Redo: (277) [user] is_like_space($)
^  Unify: (277) [user] is_like_space($)
   Call: (278) [system] char_type($, end_of_line)
^  Redo: (277) [user] is_like_space($)
^  Unify: (277) [user] is_like_space($)
   Call: (278) [system] char_type($, space)
^  Redo: (277) [user] is_like_space($)
^  Unify: (277) [user] is_like_space($)
   Call: (278) [system] char_type($, cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] get_char((0x55aefe44e2f0), _128068)
   Exit: (276) [system] get_char((0x55aefe44e2f0), $)
   Call: (276) [system] ($)='('
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _107570)
   Call: (276) [system] ($)='['
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _107570)
   Call: (276) [system] ($)='{'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _107570)
   Call: (276) [system] ($)='"'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _107570)
   Call: (276) [system] ($)=!
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _107570)
   Call: (276) [system] ($)='\''
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _107570)
   Call: (276) [system] ($)='`'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _107570)
   Call: (276) [system] ($)=end_of_file
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _107570)
^  Call: (276) [user] read_symbolic(')', (0x55aefe44e2f0), $, _107570)
^  Unify: (276) [user] read_symbolic(')', (0x55aefe44e2f0), $, _107570)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _146678)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _146678)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _148544)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (278) [user] is_delimiter(t)
^  Unify: (278) [user] is_delimiter(t)
   Call: (279) [system] char_type(t, space)
^  Redo: (278) [user] is_delimiter(t)
   Call: (279) [system] arg(_154184, v('(', ')', end_of_file), t)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _146678)
   Call: (278) [system] ')'==t
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _146678)
   Call: (278) [system] get_char((0x55aefe44e2f0), t)
   Exit: (278) [system] get_char((0x55aefe44e2f0), t)
   Call: (278) [system] t=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _146678)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _161550)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _161550)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _163416)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), h)
^  Call: (279) [user] is_delimiter(h)
^  Unify: (279) [user] is_delimiter(h)
   Call: (280) [system] char_type(h, space)
^  Redo: (279) [user] is_delimiter(h)
   Call: (280) [system] arg(_169056, v('(', ')', end_of_file), h)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _161550)
   Call: (279) [system] ')'==h
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _161550)
   Call: (279) [system] get_char((0x55aefe44e2f0), h)
   Exit: (279) [system] get_char((0x55aefe44e2f0), h)
   Call: (279) [system] h=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _161550)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _176422)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _176422)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _178288)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (280) [user] is_delimiter(e)
^  Unify: (280) [user] is_delimiter(e)
   Call: (281) [system] char_type(e, space)
^  Redo: (280) [user] is_delimiter(e)
   Call: (281) [system] arg(_183928, v('(', ')', end_of_file), e)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _176422)
   Call: (280) [system] ')'==e
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _176422)
   Call: (280) [system] get_char((0x55aefe44e2f0), e)
   Exit: (280) [system] get_char((0x55aefe44e2f0), e)
   Call: (280) [system] e=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _176422)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _191294)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _191294)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _193160)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (281) [user] is_delimiter(n)
^  Unify: (281) [user] is_delimiter(n)
   Call: (282) [system] char_type(n, space)
^  Redo: (281) [user] is_delimiter(n)
   Call: (282) [system] arg(_198800, v('(', ')', end_of_file), n)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _191294)
   Call: (281) [system] ')'==n
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _191294)
   Call: (281) [system] get_char((0x55aefe44e2f0), n)
   Exit: (281) [system] get_char((0x55aefe44e2f0), n)
   Call: (281) [system] n=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _191294)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _206166)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _206166)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _208032)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (282) [user] is_delimiter(' ')
^  Unify: (282) [user] is_delimiter(' ')
   Call: (283) [system] char_type(' ', space)
   Exit: (283) [system] char_type(' ', space)
^  Exit: (282) [user] is_delimiter(' ')
   Call: (282) [system] _206166=[]
   Exit: (282) [system] []=[]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (281) [system] _191294=[n]
   Exit: (281) [system] [n]=[n]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (280) [system] _176422=[e, n]
   Exit: (280) [system] [e, n]=[e, n]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, n])
   Call: (279) [system] _161550=[h, e, n]
   Exit: (279) [system] [h, e, n]=[h, e, n]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [h, e, n])
   Call: (278) [system] _146678=[t, h, e, n]
   Exit: (278) [system] [t, h, e, n]=[t, h, e, n]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, h, e, n])
^  Call: (277) [user] classify_and_convert_charseq($, [t, h, e, n], _107570)
^  Unify: (277) [user] classify_and_convert_charseq($, [t, h, e, n], '$VAR'(_229416))
   Call: (278) [system] atom_chars(_229416, ['_', t, h, e, n])
   Exit: (278) [system] atom_chars('_then', ['_', t, h, e, n])
^  Exit: (277) [user] classify_and_convert_charseq($, [t, h, e, n], _then)
^  Exit: (276) [user] read_symbolic(')', (0x55aefe44e2f0), $, _then)
^  Exit: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _then)
^  Call: (275) [user] read_list(')', (0x55aefe44e2f0), _235012)
^  Unify: (275) [user] read_list(')', (0x55aefe44e2f0), _235012)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _238726)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (277) [system] ' '=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space(' ')
^  Unify: (277) [user] is_like_space(' ')
   Call: (278) [system] char_type(' ', 'white')
   Exit: (278) [system] char_type(' ', 'white')
^  Exit: (277) [user] is_like_space(' ')
   Call: (277) [system] get_char((0x55aefe44e2f0), _247384)
   Exit: (277) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _251012)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), $)
   Call: (278) [system] ($)=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space($)
^  Unify: (278) [user] is_like_space($)
   Call: (279) [system] char_type($, 'white')
^  Redo: (278) [user] is_like_space($)
^  Unify: (278) [user] is_like_space($)
   Call: (279) [system] char_type($, end_of_line)
^  Redo: (278) [user] is_like_space($)
^  Unify: (278) [user] is_like_space($)
   Call: (279) [system] char_type($, space)
^  Redo: (278) [user] is_like_space($)
^  Unify: (278) [user] is_like_space($)
   Call: (279) [system] char_type($, cntrl)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _268720)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), $)
   Call: (276) [system] ($)=')'
^  Redo: (275) [user] read_list(')', (0x55aefe44e2f0), _235012)
   Call: (276) [system] ($)=end_of_file
^  Redo: (275) [user] read_list(')', (0x55aefe44e2f0), _235012)
^  Call: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _274298)
^  Unify: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _274298)
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _278012)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), $)
   Call: (278) [system] ($)=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space($)
^  Unify: (278) [user] is_like_space($)
   Call: (279) [system] char_type($, 'white')
^  Redo: (278) [user] is_like_space($)
^  Unify: (278) [user] is_like_space($)
   Call: (279) [system] char_type($, end_of_line)
^  Redo: (278) [user] is_like_space($)
^  Unify: (278) [user] is_like_space($)
   Call: (279) [system] char_type($, space)
^  Redo: (278) [user] is_like_space($)
^  Unify: (278) [user] is_like_space($)
   Call: (279) [system] char_type($, cntrl)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] get_char((0x55aefe44e2f0), _294796)
   Exit: (277) [system] get_char((0x55aefe44e2f0), $)
   Call: (277) [system] ($)='('
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _274298)
   Call: (277) [system] ($)='['
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _274298)
   Call: (277) [system] ($)='{'
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _274298)
   Call: (277) [system] ($)='"'
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _274298)
   Call: (277) [system] ($)=!
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _274298)
   Call: (277) [system] ($)='\''
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _274298)
   Call: (277) [system] ($)='`'
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _274298)
   Call: (277) [system] ($)=end_of_file
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _274298)
^  Call: (277) [user] read_symbolic(')', (0x55aefe44e2f0), $, _274298)
^  Unify: (277) [user] read_symbolic(')', (0x55aefe44e2f0), $, _274298)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _313406)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _313406)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _315272)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (279) [user] is_delimiter(e)
^  Unify: (279) [user] is_delimiter(e)
   Call: (280) [system] char_type(e, space)
^  Redo: (279) [user] is_delimiter(e)
   Call: (280) [system] arg(_320912, v('(', ')', end_of_file), e)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _313406)
   Call: (279) [system] ')'==e
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _313406)
   Call: (279) [system] get_char((0x55aefe44e2f0), e)
   Exit: (279) [system] get_char((0x55aefe44e2f0), e)
   Call: (279) [system] e=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _313406)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _328278)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _328278)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _330144)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (280) [user] is_delimiter(l)
^  Unify: (280) [user] is_delimiter(l)
   Call: (281) [system] char_type(l, space)
^  Redo: (280) [user] is_delimiter(l)
   Call: (281) [system] arg(_335784, v('(', ')', end_of_file), l)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _328278)
   Call: (280) [system] ')'==l
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _328278)
   Call: (280) [system] get_char((0x55aefe44e2f0), l)
   Exit: (280) [system] get_char((0x55aefe44e2f0), l)
   Call: (280) [system] l=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _328278)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _343150)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _343150)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _345016)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (281) [user] is_delimiter(s)
^  Unify: (281) [user] is_delimiter(s)
   Call: (282) [system] char_type(s, space)
^  Redo: (281) [user] is_delimiter(s)
   Call: (282) [system] arg(_350656, v('(', ')', end_of_file), s)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _343150)
   Call: (281) [system] ')'==s
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _343150)
   Call: (281) [system] get_char((0x55aefe44e2f0), s)
   Exit: (281) [system] get_char((0x55aefe44e2f0), s)
   Call: (281) [system] s=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _343150)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _358022)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _358022)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _359888)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (282) [user] is_delimiter(e)
^  Unify: (282) [user] is_delimiter(e)
   Call: (283) [system] char_type(e, space)
^  Redo: (282) [user] is_delimiter(e)
   Call: (283) [system] arg(_365528, v('(', ')', end_of_file), e)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _358022)
   Call: (282) [system] ')'==e
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _358022)
   Call: (282) [system] get_char((0x55aefe44e2f0), e)
   Exit: (282) [system] get_char((0x55aefe44e2f0), e)
   Call: (282) [system] e=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _358022)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _372894)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _372894)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _374760)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (283) [user] is_delimiter(')')
^  Unify: (283) [user] is_delimiter(')')
   Call: (284) [system] char_type(')', space)
^  Redo: (283) [user] is_delimiter(')')
   Call: (284) [system] arg(_380400, v('(', ')', end_of_file), ')')
   Exit: (284) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (283) [user] is_delimiter(')')
   Call: (283) [system] _372894=[]
   Exit: (283) [system] []=[]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (282) [system] _358022=[e]
   Exit: (282) [system] [e]=[e]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e])
   Call: (281) [system] _343150=[s, e]
   Exit: (281) [system] [s, e]=[s, e]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, e])
   Call: (280) [system] _328278=[l, s, e]
   Exit: (280) [system] [l, s, e]=[l, s, e]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l, s, e])
   Call: (279) [system] _313406=[e, l, s, e]
   Exit: (279) [system] [e, l, s, e]=[e, l, s, e]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, l, s, e])
^  Call: (278) [user] classify_and_convert_charseq($, [e, l, s, e], _274298)
^  Unify: (278) [user] classify_and_convert_charseq($, [e, l, s, e], '$VAR'(_398012))
   Call: (279) [system] atom_chars(_398012, ['_', e, l, s, e])
   Exit: (279) [system] atom_chars('_else', ['_', e, l, s, e])
^  Exit: (278) [user] classify_and_convert_charseq($, [e, l, s, e], _else)
^  Exit: (277) [user] read_symbolic(')', (0x55aefe44e2f0), $, _else)
^  Exit: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _else)
^  Call: (276) [user] read_list(')', (0x55aefe44e2f0), _403608)
^  Unify: (276) [user] read_list(')', (0x55aefe44e2f0), _403608)
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _407322)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (278) [system] ')'=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space(')')
^  Unify: (278) [user] is_like_space(')')
   Call: (279) [system] char_type(')', 'white')
^  Redo: (278) [user] is_like_space(')')
^  Unify: (278) [user] is_like_space(')')
   Call: (279) [system] char_type(')', end_of_line)
^  Redo: (278) [user] is_like_space(')')
^  Unify: (278) [user] is_like_space(')')
   Call: (279) [system] char_type(')', space)
^  Redo: (278) [user] is_like_space(')')
^  Unify: (278) [user] is_like_space(')')
   Call: (279) [system] char_type(')', cntrl)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _424106)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (277) [system] ')'=')'
   Exit: (277) [system] ')'=')'
   Call: (277) [system] get_char((0x55aefe44e2f0), _427896)
   Exit: (277) [system] get_char((0x55aefe44e2f0), ')')
   Call: (277) [system] _403608=[]
   Exit: (277) [system] []=[]
^  Exit: (276) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (276) [system] _235012=[_else]
   Exit: (276) [system] [_else]=[_else]
^  Exit: (275) [user] read_list(')', (0x55aefe44e2f0), [_else])
   Call: (275) [system] _68284=[_then, _else]
   Exit: (275) [system] [_then, _else]=[_then, _else]
^  Exit: (274) [user] read_list(')', (0x55aefe44e2f0), [_then, _else])
   Call: (274) [system] _6014=[_tail, _then, _else]
   Exit: (274) [system] [_tail, _then, _else]=[_tail, _then, _else]
^  Exit: (273) [user] read_list(')', (0x55aefe44e2f0), [_tail, _then, _else])
   Call: (273) [system] _6004=[_head, _tail, _then, _else]
   Exit: (273) [system] [_head, _tail, _then, _else]=[_head, _tail, _then, _else]
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), [_head, _tail, _then, _else])
   Call: (272) [system] _5994=[_atom, _head, _tail, _then, _else]
   Exit: (272) [system] [_atom, _head, _tail, _then, _else]=[_atom, _head, _tail, _then, _else]
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [_atom, _head, _tail, _then, _else])
   Call: (271) [system] _5986=['if-decons-expr', _atom, _head, _tail, _then, _else]
   Exit: (271) [system] ['if-decons-expr', _atom, _head, _tail, _then, _else]=['if-decons-expr', _atom, _head, _tail, _then, _else]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), ['if-decons-expr', _atom, _head, _tail, _then, _else])
^  Exit: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), ['if-decons-expr', _atom, _head, _tail, _then, _else])
^  Call: (269) [user] read_list(')', (0x55aefe44e2f0), _450160)
^  Unify: (269) [user] read_list(')', (0x55aefe44e2f0), _450160)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _453874)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (271) [system] '\n'=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space('\n')
^  Unify: (271) [user] is_like_space('\n')
   Call: (272) [system] char_type('\n', 'white')
^  Redo: (271) [user] is_like_space('\n')
^  Unify: (271) [user] is_like_space('\n')
   Call: (272) [system] char_type('\n', end_of_line)
   Exit: (272) [system] char_type('\n', end_of_line)
^  Exit: (271) [user] is_like_space('\n')
   Call: (271) [system] get_char((0x55aefe44e2f0), _465186)
   Exit: (271) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _468814)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (272) [system] ' '=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(' ')
^  Unify: (272) [user] is_like_space(' ')
   Call: (273) [system] char_type(' ', 'white')
   Exit: (273) [system] char_type(' ', 'white')
^  Exit: (272) [user] is_like_space(' ')
   Call: (272) [system] get_char((0x55aefe44e2f0), _477472)
   Exit: (272) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _481100)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (273) [system] ' '=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(' ')
^  Unify: (273) [user] is_like_space(' ')
   Call: (274) [system] char_type(' ', 'white')
   Exit: (274) [system] char_type(' ', 'white')
^  Exit: (273) [user] is_like_space(' ')
   Call: (273) [system] get_char((0x55aefe44e2f0), _489758)
   Exit: (273) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _493386)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (274) [system] '('=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space('(')
^  Unify: (274) [user] is_like_space('(')
   Call: (275) [system] char_type('(', 'white')
^  Redo: (274) [user] is_like_space('(')
^  Unify: (274) [user] is_like_space('(')
   Call: (275) [system] char_type('(', end_of_line)
^  Redo: (274) [user] is_like_space('(')
^  Unify: (274) [user] is_like_space('(')
   Call: (275) [system] char_type('(', space)
^  Redo: (274) [user] is_like_space('(')
^  Unify: (274) [user] is_like_space('(')
   Call: (275) [system] char_type('(', cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _512942)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (270) [system] '('=')'
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _450160)
   Call: (270) [system] '('=end_of_file
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _450160)
^  Call: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _518520)
^  Unify: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _518520)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _522234)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] get_char((0x55aefe44e2f0), _20942)
   Exit: (271) [system] get_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('='('
   Exit: (271) [system] '('='('
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _6048)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _6048)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _28368)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), f)
   Call: (273) [system] f=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(f)
^  Unify: (273) [user] is_like_space(f)
   Call: (274) [system] char_type(f, 'white')
^  Redo: (273) [user] is_like_space(f)
^  Unify: (273) [user] is_like_space(f)
   Call: (274) [system] char_type(f, end_of_line)
^  Redo: (273) [user] is_like_space(f)
^  Unify: (273) [user] is_like_space(f)
   Call: (274) [system] char_type(f, space)
^  Redo: (273) [user] is_like_space(f)
^  Unify: (273) [user] is_like_space(f)
   Call: (274) [system] char_type(f, cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _45152)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), f)
   Call: (272) [system] f=')'
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _6048)
   Call: (272) [system] f=end_of_file
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _6048)
^  Call: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _50730)
^  Unify: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _50730)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _54444)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), f)
   Call: (274) [system] f=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(f)
^  Unify: (274) [user] is_like_space(f)
   Call: (275) [system] char_type(f, 'white')
^  Redo: (274) [user] is_like_space(f)
^  Unify: (274) [user] is_like_space(f)
   Call: (275) [system] char_type(f, end_of_line)
^  Redo: (274) [user] is_like_space(f)
^  Unify: (274) [user] is_like_space(f)
   Call: (275) [system] char_type(f, space)
^  Redo: (274) [user] is_like_space(f)
^  Unify: (274) [user] is_like_space(f)
   Call: (275) [system] char_type(f, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] get_char((0x55aefe44e2f0), _71228)
   Exit: (273) [system] get_char((0x55aefe44e2f0), f)
   Call: (273) [system] f='('
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _50730)
   Call: (273) [system] f='['
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _50730)
   Call: (273) [system] f='{'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _50730)
   Call: (273) [system] f='"'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _50730)
   Call: (273) [system] f=!
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _50730)
   Call: (273) [system] f='\''
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _50730)
   Call: (273) [system] f='`'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _50730)
   Call: (273) [system] f=end_of_file
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _50730)
^  Call: (273) [user] read_symbolic(')', (0x55aefe44e2f0), f, _50730)
^  Unify: (273) [user] read_symbolic(')', (0x55aefe44e2f0), f, _50730)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _89838)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _89838)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _91704)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), u)
^  Call: (275) [user] is_delimiter(u)
^  Unify: (275) [user] is_delimiter(u)
   Call: (276) [system] char_type(u, space)
^  Redo: (275) [user] is_delimiter(u)
   Call: (276) [system] arg(_97344, v('(', ')', end_of_file), u)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _89838)
   Call: (275) [system] ')'==u
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _89838)
   Call: (275) [system] get_char((0x55aefe44e2f0), u)
   Exit: (275) [system] get_char((0x55aefe44e2f0), u)
   Call: (275) [system] u=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _89838)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _104710)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _104710)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _106576)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (276) [user] is_delimiter(n)
^  Unify: (276) [user] is_delimiter(n)
   Call: (277) [system] char_type(n, space)
^  Redo: (276) [user] is_delimiter(n)
   Call: (277) [system] arg(_112216, v('(', ')', end_of_file), n)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _104710)
   Call: (276) [system] ')'==n
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _104710)
   Call: (276) [system] get_char((0x55aefe44e2f0), n)
   Exit: (276) [system] get_char((0x55aefe44e2f0), n)
   Call: (276) [system] n=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _104710)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _119582)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _119582)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _121448)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), c)
^  Call: (277) [user] is_delimiter(c)
^  Unify: (277) [user] is_delimiter(c)
   Call: (278) [system] char_type(c, space)
^  Redo: (277) [user] is_delimiter(c)
   Call: (278) [system] arg(_127088, v('(', ')', end_of_file), c)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _119582)
   Call: (277) [system] ')'==c
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _119582)
   Call: (277) [system] get_char((0x55aefe44e2f0), c)
   Exit: (277) [system] get_char((0x55aefe44e2f0), c)
   Call: (277) [system] c=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _119582)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _134454)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _134454)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _136320)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (278) [user] is_delimiter(t)
^  Unify: (278) [user] is_delimiter(t)
   Call: (279) [system] char_type(t, space)
^  Redo: (278) [user] is_delimiter(t)
   Call: (279) [system] arg(_141960, v('(', ')', end_of_file), t)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _134454)
   Call: (278) [system] ')'==t
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _134454)
   Call: (278) [system] get_char((0x55aefe44e2f0), t)
   Exit: (278) [system] get_char((0x55aefe44e2f0), t)
   Call: (278) [system] t=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _134454)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _149326)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _149326)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _151192)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (279) [user] is_delimiter(i)
^  Unify: (279) [user] is_delimiter(i)
   Call: (280) [system] char_type(i, space)
^  Redo: (279) [user] is_delimiter(i)
   Call: (280) [system] arg(_156832, v('(', ')', end_of_file), i)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _149326)
   Call: (279) [system] ')'==i
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _149326)
   Call: (279) [system] get_char((0x55aefe44e2f0), i)
   Exit: (279) [system] get_char((0x55aefe44e2f0), i)
   Call: (279) [system] i=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _149326)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _164198)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _164198)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _166064)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (280) [user] is_delimiter(o)
^  Unify: (280) [user] is_delimiter(o)
   Call: (281) [system] char_type(o, space)
^  Redo: (280) [user] is_delimiter(o)
   Call: (281) [system] arg(_171704, v('(', ')', end_of_file), o)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _164198)
   Call: (280) [system] ')'==o
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _164198)
   Call: (280) [system] get_char((0x55aefe44e2f0), o)
   Exit: (280) [system] get_char((0x55aefe44e2f0), o)
   Call: (280) [system] o=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _164198)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _179070)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _179070)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _180936)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (281) [user] is_delimiter(n)
^  Unify: (281) [user] is_delimiter(n)
   Call: (282) [system] char_type(n, space)
^  Redo: (281) [user] is_delimiter(n)
   Call: (282) [system] arg(_186576, v('(', ')', end_of_file), n)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _179070)
   Call: (281) [system] ')'==n
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _179070)
   Call: (281) [system] get_char((0x55aefe44e2f0), n)
   Exit: (281) [system] get_char((0x55aefe44e2f0), n)
   Call: (281) [system] n=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _179070)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _193942)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _193942)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _195808)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (282) [user] is_delimiter(' ')
^  Unify: (282) [user] is_delimiter(' ')
   Call: (283) [system] char_type(' ', space)
   Exit: (283) [system] char_type(' ', space)
^  Exit: (282) [user] is_delimiter(' ')
   Call: (282) [system] _193942=[]
   Exit: (282) [system] []=[]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (281) [system] _179070=[n]
   Exit: (281) [system] [n]=[n]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (280) [system] _164198=[o, n]
   Exit: (280) [system] [o, n]=[o, n]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, n])
   Call: (279) [system] _149326=[i, o, n]
   Exit: (279) [system] [i, o, n]=[i, o, n]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, o, n])
   Call: (278) [system] _134454=[t, i, o, n]
   Exit: (278) [system] [t, i, o, n]=[t, i, o, n]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, i, o, n])
   Call: (277) [system] _119582=[c, t, i, o, n]
   Exit: (277) [system] [c, t, i, o, n]=[c, t, i, o, n]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [c, t, i, o, n])
   Call: (276) [system] _104710=[n, c, t, i, o, n]
   Exit: (276) [system] [n, c, t, i, o, n]=[n, c, t, i, o, n]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n, c, t, i, o, n])
   Call: (275) [system] _89838=[u, n, c, t, i, o, n]
   Exit: (275) [system] [u, n, c, t, i, o, n]=[u, n, c, t, i, o, n]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [u, n, c, t, i, o, n])
^  Call: (274) [user] classify_and_convert_charseq(f, [u, n, c, t, i, o, n], _50730)
^  Unify: (274) [user] classify_and_convert_charseq(f, [u, n, c, t, i, o, n], _50730)
^  Call: (276) [system] setup_call_cleanup('$notrace'(_226532, _226534), once(user:catch(read_from_chars([f, u, n, c, t, i, o, n], _50730), _226508, fail)), '$restore_trace'(_226532, _226534))
^  Unify: (276) [system] setup_call_cleanup(system:'$notrace'(_226532, _226534), system:once(user:catch(read_from_chars([f, u, n, c, t, i, o, n], _50730), _226508, fail)), system:'$restore_trace'(_226532, _226534))
^  Call: (277) [system] sig_atomic(system:'$notrace'(_226532, _226534))
^  Exit: (276) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([f, u, n, c, t, i, o, n], function), _226508, fail)), system:'$restore_trace'(3, -1))
   Call: (275) [system] atomic(function)
   Exit: (275) [system] atomic(function)
^  Exit: (274) [user] classify_and_convert_charseq(f, [u, n, c, t, i, o, n], function)
^  Exit: (273) [user] read_symbolic(')', (0x55aefe44e2f0), f, function)
^  Exit: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), function)
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _234970)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _234970)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _238684)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (274) [system] ' '=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(' ')
^  Unify: (274) [user] is_like_space(' ')
   Call: (275) [system] char_type(' ', 'white')
   Exit: (275) [system] char_type(' ', 'white')
^  Exit: (274) [user] is_like_space(' ')
   Call: (274) [system] get_char((0x55aefe44e2f0), _247342)
   Exit: (274) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _250970)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (275) [system] '('=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', 'white')
^  Redo: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', end_of_line)
^  Redo: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', space)
^  Redo: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _268678)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (273) [system] '('=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _234970)
   Call: (273) [system] '('=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _234970)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _274256)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _274256)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _277970)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (275) [system] '('=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', 'white')
^  Redo: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', end_of_line)
^  Redo: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', space)
^  Redo: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _294754)
   Exit: (274) [system] get_char((0x55aefe44e2f0), '(')
   Call: (274) [system] '('='('
   Exit: (274) [system] '('='('
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _274256)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _274256)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _302180)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), e)
   Call: (276) [system] e=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(e)
^  Unify: (276) [user] is_like_space(e)
   Call: (277) [system] char_type(e, 'white')
^  Redo: (276) [user] is_like_space(e)
^  Unify: (276) [user] is_like_space(e)
   Call: (277) [system] char_type(e, end_of_line)
^  Redo: (276) [user] is_like_space(e)
^  Unify: (276) [user] is_like_space(e)
   Call: (277) [system] char_type(e, space)
^  Redo: (276) [user] is_like_space(e)
^  Unify: (276) [user] is_like_space(e)
   Call: (277) [system] char_type(e, cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _318964)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), e)
   Call: (275) [system] e=')'
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _274256)
   Call: (275) [system] e=end_of_file
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _274256)
^  Call: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _324542)
^  Unify: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _324542)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _328256)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), e)
   Call: (277) [system] e=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space(e)
^  Unify: (277) [user] is_like_space(e)
   Call: (278) [system] char_type(e, 'white')
^  Redo: (277) [user] is_like_space(e)
^  Unify: (277) [user] is_like_space(e)
   Call: (278) [system] char_type(e, end_of_line)
^  Redo: (277) [user] is_like_space(e)
^  Unify: (277) [user] is_like_space(e)
   Call: (278) [system] char_type(e, space)
^  Redo: (277) [user] is_like_space(e)
^  Unify: (277) [user] is_like_space(e)
   Call: (278) [system] char_type(e, cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] get_char((0x55aefe44e2f0), _345040)
   Exit: (276) [system] get_char((0x55aefe44e2f0), e)
   Call: (276) [system] e='('
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _324542)
   Call: (276) [system] e='['
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _324542)
   Call: (276) [system] e='{'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _324542)
   Call: (276) [system] e='"'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _324542)
   Call: (276) [system] e=!
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _324542)
   Call: (276) [system] e='\''
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _324542)
   Call: (276) [system] e='`'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _324542)
   Call: (276) [system] e=end_of_file
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _324542)
^  Call: (276) [user] read_symbolic(')', (0x55aefe44e2f0), e, _324542)
^  Unify: (276) [user] read_symbolic(')', (0x55aefe44e2f0), e, _324542)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _363650)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _363650)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _365516)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), v)
^  Call: (278) [user] is_delimiter(v)
^  Unify: (278) [user] is_delimiter(v)
   Call: (279) [system] char_type(v, space)
^  Redo: (278) [user] is_delimiter(v)
   Call: (279) [system] arg(_371156, v('(', ')', end_of_file), v)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _363650)
   Call: (278) [system] ')'==v
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _363650)
   Call: (278) [system] get_char((0x55aefe44e2f0), v)
   Exit: (278) [system] get_char((0x55aefe44e2f0), v)
   Call: (278) [system] v=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _363650)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _378522)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _378522)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _380388)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (279) [user] is_delimiter(a)
^  Unify: (279) [user] is_delimiter(a)
   Call: (280) [system] char_type(a, space)
^  Redo: (279) [user] is_delimiter(a)
   Call: (280) [system] arg(_386028, v('(', ')', end_of_file), a)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _378522)
   Call: (279) [system] ')'==a
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _378522)
   Call: (279) [system] get_char((0x55aefe44e2f0), a)
   Exit: (279) [system] get_char((0x55aefe44e2f0), a)
   Call: (279) [system] a=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _378522)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _393394)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _393394)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _395260)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (280) [user] is_delimiter(l)
^  Unify: (280) [user] is_delimiter(l)
   Call: (281) [system] char_type(l, space)
^  Redo: (280) [user] is_delimiter(l)
   Call: (281) [system] arg(_400900, v('(', ')', end_of_file), l)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _393394)
   Call: (280) [system] ')'==l
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _393394)
   Call: (280) [system] get_char((0x55aefe44e2f0), l)
   Exit: (280) [system] get_char((0x55aefe44e2f0), l)
   Call: (280) [system] l=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _393394)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _408266)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _408266)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _410132)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (281) [user] is_delimiter(' ')
^  Unify: (281) [user] is_delimiter(' ')
   Call: (282) [system] char_type(' ', space)
   Exit: (282) [system] char_type(' ', space)
^  Exit: (281) [user] is_delimiter(' ')
   Call: (281) [system] _408266=[]
   Exit: (281) [system] []=[]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (280) [system] _393394=[l]
   Exit: (280) [system] [l]=[l]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l])
   Call: (279) [system] _378522=[a, l]
   Exit: (279) [system] [a, l]=[a, l]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, l])
   Call: (278) [system] _363650=[v, a, l]
   Exit: (278) [system] [v, a, l]=[v, a, l]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [v, a, l])
^  Call: (277) [user] classify_and_convert_charseq(e, [v, a, l], _324542)
^  Unify: (277) [user] classify_and_convert_charseq(e, [v, a, l], _324542)
^  Call: (279) [system] setup_call_cleanup('$notrace'(_429680, _429682), once(user:catch(read_from_chars([e, v, a, l], _324542), _429656, fail)), '$restore_trace'(_429680, _429682))
^  Unify: (279) [system] setup_call_cleanup(system:'$notrace'(_429680, _429682), system:once(user:catch(read_from_chars([e, v, a, l], _324542), _429656, fail)), system:'$restore_trace'(_429680, _429682))
^  Call: (280) [system] sig_atomic(system:'$notrace'(_429680, _429682))
^  Exit: (279) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([e, v, a, l], eval), _429656, fail)), system:'$restore_trace'(3, -1))
   Call: (278) [system] atomic(eval)
   Exit: (278) [system] atomic(eval)
^  Exit: (277) [user] classify_and_convert_charseq(e, [v, a, l], eval)
^  Exit: (276) [user] read_symbolic(')', (0x55aefe44e2f0), e, eval)
^  Exit: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), eval)
^  Call: (275) [user] read_list(')', (0x55aefe44e2f0), _438118)
^  Unify: (275) [user] read_list(')', (0x55aefe44e2f0), _438118)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _441832)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (277) [system] ' '=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space(' ')
^  Unify: (277) [user] is_like_space(' ')
   Call: (278) [system] char_type(' ', 'white')
   Exit: (278) [system] char_type(' ', 'white')
^  Exit: (277) [user] is_like_space(' ')
   Call: (277) [system] get_char((0x55aefe44e2f0), _450490)
   Exit: (277) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _454118)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (278) [system] '('=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', 'white')
^  Redo: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', end_of_line)
^  Redo: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', space)
^  Redo: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', cntrl)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _471826)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (276) [system] '('=')'
^  Redo: (275) [user] read_list(')', (0x55aefe44e2f0), _438118)
   Call: (276) [system] '('=end_of_file
^  Redo: (275) [user] read_list(')', (0x55aefe44e2f0), _438118)
^  Call: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _477404)
^  Unify: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _477404)
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _481118)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (278) [system] '('=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', 'white')
^  Redo: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', end_of_line)
^  Redo: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', space)
^  Redo: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', cntrl)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] get_char((0x55aefe44e2f0), _497902)
   Exit: (277) [system] get_char((0x55aefe44e2f0), '(')
   Call: (277) [system] '('='('
   Exit: (277) [system] '('='('
^  Call: (277) [user] read_list(')', (0x55aefe44e2f0), _477404)
^  Unify: (277) [user] read_list(')', (0x55aefe44e2f0), _477404)
^  Call: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _505328)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), i)
   Call: (279) [system] i=(;)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (279) [user] is_like_space(i)
^  Unify: (279) [user] is_like_space(i)
   Call: (280) [system] char_type(i, 'white')
^  Redo: (279) [user] is_like_space(i)
^  Unify: (279) [user] is_like_space(i)
   Call: (280) [system] char_type(i, end_of_line)
^  Redo: (279) [user] is_like_space(i)
^  Unify: (279) [user] is_like_space(i)
   Call: (280) [system] char_type(i, space)
^  Redo: (279) [user] is_like_space(i)
^  Unify: (279) [user] is_like_space(i)
   Call: (280) [system] char_type(i, cntrl)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _522112)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), i)
   Call: (278) [system] i=')'
^  Redo: (277) [user] read_list(')', (0x55aefe44e2f0), _6072)
   Call: (278) [system] i=end_of_file
^  Redo: (277) [user] read_list(')', (0x55aefe44e2f0), _6072)
^  Call: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _9740)
^  Unify: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _9740)
^  Call: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] peek_char((0x55aefe44e2f0), _13454)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), i)
   Call: (280) [system] i=(;)
^  Redo: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (280) [user] is_like_space(i)
^  Unify: (280) [user] is_like_space(i)
   Call: (281) [system] char_type(i, 'white')
^  Redo: (280) [user] is_like_space(i)
^  Unify: (280) [user] is_like_space(i)
   Call: (281) [system] char_type(i, end_of_line)
^  Redo: (280) [user] is_like_space(i)
^  Unify: (280) [user] is_like_space(i)
   Call: (281) [system] char_type(i, space)
^  Redo: (280) [user] is_like_space(i)
^  Unify: (280) [user] is_like_space(i)
   Call: (281) [system] char_type(i, cntrl)
^  Redo: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] get_char((0x55aefe44e2f0), _30238)
   Exit: (279) [system] get_char((0x55aefe44e2f0), i)
   Call: (279) [system] i='('
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _9740)
   Call: (279) [system] i='['
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _9740)
   Call: (279) [system] i='{'
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _9740)
   Call: (279) [system] i='"'
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _9740)
   Call: (279) [system] i=!
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _9740)
   Call: (279) [system] i='\''
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _9740)
   Call: (279) [system] i='`'
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _9740)
   Call: (279) [system] i=end_of_file
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _9740)
^  Call: (279) [user] read_symbolic(')', (0x55aefe44e2f0), i, _9740)
^  Unify: (279) [user] read_symbolic(')', (0x55aefe44e2f0), i, _9740)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _48848)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _48848)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _50714)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), f)
^  Call: (281) [user] is_delimiter(f)
^  Unify: (281) [user] is_delimiter(f)
   Call: (282) [system] char_type(f, space)
^  Redo: (281) [user] is_delimiter(f)
   Call: (282) [system] arg(_56354, v('(', ')', end_of_file), f)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _48848)
   Call: (281) [system] ')'==f
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _48848)
   Call: (281) [system] get_char((0x55aefe44e2f0), f)
   Exit: (281) [system] get_char((0x55aefe44e2f0), f)
   Call: (281) [system] f=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _48848)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _63720)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _63720)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _65586)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), -)
^  Call: (282) [user] is_delimiter(-)
^  Unify: (282) [user] is_delimiter(-)
   Call: (283) [system] char_type(-, space)
^  Redo: (282) [user] is_delimiter(-)
   Call: (283) [system] arg(_71226, v('(', ')', end_of_file), -)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _63720)
   Call: (282) [system] ')'==(-)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _63720)
   Call: (282) [system] get_char((0x55aefe44e2f0), -)
   Exit: (282) [system] get_char((0x55aefe44e2f0), -)
   Call: (282) [system] (-)=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _63720)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _78592)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _78592)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _80458)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (283) [user] is_delimiter(e)
^  Unify: (283) [user] is_delimiter(e)
   Call: (284) [system] char_type(e, space)
^  Redo: (283) [user] is_delimiter(e)
   Call: (284) [system] arg(_86098, v('(', ')', end_of_file), e)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _78592)
   Call: (283) [system] ')'==e
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _78592)
   Call: (283) [system] get_char((0x55aefe44e2f0), e)
   Exit: (283) [system] get_char((0x55aefe44e2f0), e)
   Call: (283) [system] e=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _78592)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _93464)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _93464)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _95330)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), q)
^  Call: (284) [user] is_delimiter(q)
^  Unify: (284) [user] is_delimiter(q)
   Call: (285) [system] char_type(q, space)
^  Redo: (284) [user] is_delimiter(q)
   Call: (285) [system] arg(_100970, v('(', ')', end_of_file), q)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _93464)
   Call: (284) [system] ')'==q
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _93464)
   Call: (284) [system] get_char((0x55aefe44e2f0), q)
   Exit: (284) [system] get_char((0x55aefe44e2f0), q)
   Call: (284) [system] q=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _93464)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _108336)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _108336)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _110202)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), u)
^  Call: (285) [user] is_delimiter(u)
^  Unify: (285) [user] is_delimiter(u)
   Call: (286) [system] char_type(u, space)
^  Redo: (285) [user] is_delimiter(u)
   Call: (286) [system] arg(_115842, v('(', ')', end_of_file), u)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _108336)
   Call: (285) [system] ')'==u
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _108336)
   Call: (285) [system] get_char((0x55aefe44e2f0), u)
   Exit: (285) [system] get_char((0x55aefe44e2f0), u)
   Call: (285) [system] u=(\)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _108336)
^  Call: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _123208)
^  Unify: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _123208)
   Call: (286) [system] peek_char((0x55aefe44e2f0), _125074)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (286) [user] is_delimiter(a)
^  Unify: (286) [user] is_delimiter(a)
   Call: (287) [system] char_type(a, space)
^  Redo: (286) [user] is_delimiter(a)
   Call: (287) [system] arg(_130714, v('(', ')', end_of_file), a)
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _123208)
   Call: (286) [system] ')'==a
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _123208)
   Call: (286) [system] get_char((0x55aefe44e2f0), a)
   Exit: (286) [system] get_char((0x55aefe44e2f0), a)
   Call: (286) [system] a=(\)
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _123208)
^  Call: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _138080)
^  Unify: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _138080)
   Call: (287) [system] peek_char((0x55aefe44e2f0), _139946)
   Exit: (287) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (287) [user] is_delimiter(l)
^  Unify: (287) [user] is_delimiter(l)
   Call: (288) [system] char_type(l, space)
^  Redo: (287) [user] is_delimiter(l)
   Call: (288) [system] arg(_145586, v('(', ')', end_of_file), l)
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _138080)
   Call: (287) [system] ')'==l
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _138080)
   Call: (287) [system] get_char((0x55aefe44e2f0), l)
   Exit: (287) [system] get_char((0x55aefe44e2f0), l)
   Call: (287) [system] l=(\)
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _138080)
^  Call: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152952)
^  Unify: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152952)
   Call: (288) [system] peek_char((0x55aefe44e2f0), _154818)
   Exit: (288) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (288) [user] is_delimiter(' ')
^  Unify: (288) [user] is_delimiter(' ')
   Call: (289) [system] char_type(' ', space)
   Exit: (289) [system] char_type(' ', space)
^  Exit: (288) [user] is_delimiter(' ')
   Call: (288) [system] _152952=[]
   Exit: (288) [system] []=[]
^  Exit: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (287) [system] _138080=[l]
   Exit: (287) [system] [l]=[l]
^  Exit: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l])
   Call: (286) [system] _123208=[a, l]
   Exit: (286) [system] [a, l]=[a, l]
^  Exit: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, l])
   Call: (285) [system] _108336=[u, a, l]
   Exit: (285) [system] [u, a, l]=[u, a, l]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [u, a, l])
   Call: (284) [system] _93464=[q, u, a, l]
   Exit: (284) [system] [q, u, a, l]=[q, u, a, l]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [q, u, a, l])
   Call: (283) [system] _78592=[e, q, u, a, l]
   Exit: (283) [system] [e, q, u, a, l]=[e, q, u, a, l]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, q, u, a, l])
   Call: (282) [system] _63720=[-, e, q, u, a, l]
   Exit: (282) [system] [-, e, q, u, a, l]=[-, e, q, u, a, l]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [-, e, q, u, a, l])
   Call: (281) [system] _48848=[f, -, e, q, u, a, l]
   Exit: (281) [system] [f, -, e, q, u, a, l]=[f, -, e, q, u, a, l]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [f, -, e, q, u, a, l])
^  Call: (280) [user] classify_and_convert_charseq(i, [f, -, e, q, u, a, l], _9740)
^  Unify: (280) [user] classify_and_convert_charseq(i, [f, -, e, q, u, a, l], _9740)
^  Call: (282) [system] setup_call_cleanup('$notrace'(_185542, _185544), once(user:catch(read_from_chars([i, f, -, e, q, u, a, l], _9740), _185518, fail)), '$restore_trace'(_185542, _185544))
^  Unify: (282) [system] setup_call_cleanup(system:'$notrace'(_185542, _185544), system:once(user:catch(read_from_chars([i, f, -, e, q, u, a, l], _9740), _185518, fail)), system:'$restore_trace'(_185542, _185544))
^  Call: (283) [system] sig_atomic(system:'$notrace'(_185542, _185544))
^  Exit: (282) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([i, f, -, e, q, u, a, l], if-equal), _185518, fail)), system:'$restore_trace'(3, -1))
   Call: (281) [system] atomic(if-equal)
^  Redo: (280) [user] classify_and_convert_charseq(i, [f, -, e, q, u, a, l], _9740)
^  Unify: (280) [user] classify_and_convert_charseq(i, [f, -, e, q, u, a, l], _9740)
   Call: (281) [system] atom_chars(_9740, [i, f, -, e, q, u, a, l])
   Exit: (281) [system] atom_chars('if-equal', [i, f, -, e, q, u, a, l])
^  Exit: (280) [user] classify_and_convert_charseq(i, [f, -, e, q, u, a, l], 'if-equal')
^  Exit: (279) [user] read_symbolic(')', (0x55aefe44e2f0), i, 'if-equal')
^  Exit: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), 'if-equal')
^  Call: (278) [user] read_list(')', (0x55aefe44e2f0), _196788)
^  Unify: (278) [user] read_list(')', (0x55aefe44e2f0), _196788)
^  Call: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] peek_char((0x55aefe44e2f0), _200502)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (280) [system] ' '=(;)
^  Redo: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (280) [user] is_like_space(' ')
^  Unify: (280) [user] is_like_space(' ')
   Call: (281) [system] char_type(' ', 'white')
   Exit: (281) [system] char_type(' ', 'white')
^  Exit: (280) [user] is_like_space(' ')
   Call: (280) [system] get_char((0x55aefe44e2f0), _209160)
   Exit: (280) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (281) [system] peek_char((0x55aefe44e2f0), _212788)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), $)
   Call: (281) [system] ($)=(;)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (281) [user] is_like_space($)
^  Unify: (281) [user] is_like_space($)
   Call: (282) [system] char_type($, 'white')
^  Redo: (281) [user] is_like_space($)
^  Unify: (281) [user] is_like_space($)
   Call: (282) [system] char_type($, end_of_line)
^  Redo: (281) [user] is_like_space($)
^  Unify: (281) [user] is_like_space($)
   Call: (282) [system] char_type($, space)
^  Redo: (281) [user] is_like_space($)
^  Unify: (281) [user] is_like_space($)
   Call: (282) [system] char_type($, cntrl)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _230496)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), $)
   Call: (279) [system] ($)=')'
^  Redo: (278) [user] read_list(')', (0x55aefe44e2f0), _196788)
   Call: (279) [system] ($)=end_of_file
^  Redo: (278) [user] read_list(')', (0x55aefe44e2f0), _196788)
^  Call: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _236074)
^  Unify: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _236074)
^  Call: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (281) [system] peek_char((0x55aefe44e2f0), _239788)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), $)
   Call: (281) [system] ($)=(;)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (281) [user] is_like_space($)
^  Unify: (281) [user] is_like_space($)
   Call: (282) [system] char_type($, 'white')
^  Redo: (281) [user] is_like_space($)
^  Unify: (281) [user] is_like_space($)
   Call: (282) [system] char_type($, end_of_line)
^  Redo: (281) [user] is_like_space($)
^  Unify: (281) [user] is_like_space($)
   Call: (282) [system] char_type($, space)
^  Redo: (281) [user] is_like_space($)
^  Unify: (281) [user] is_like_space($)
   Call: (282) [system] char_type($, cntrl)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] get_char((0x55aefe44e2f0), _256572)
   Exit: (280) [system] get_char((0x55aefe44e2f0), $)
   Call: (280) [system] ($)='('
^  Redo: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _236074)
   Call: (280) [system] ($)='['
^  Redo: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _236074)
   Call: (280) [system] ($)='{'
^  Redo: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _236074)
   Call: (280) [system] ($)='"'
^  Redo: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _236074)
   Call: (280) [system] ($)=!
^  Redo: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _236074)
   Call: (280) [system] ($)='\''
^  Redo: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _236074)
   Call: (280) [system] ($)='`'
^  Redo: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _236074)
   Call: (280) [system] ($)=end_of_file
^  Redo: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _236074)
^  Call: (280) [user] read_symbolic(')', (0x55aefe44e2f0), $, _236074)
^  Unify: (280) [user] read_symbolic(')', (0x55aefe44e2f0), $, _236074)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275182)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275182)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _277048)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (282) [user] is_delimiter(a)
^  Unify: (282) [user] is_delimiter(a)
   Call: (283) [system] char_type(a, space)
^  Redo: (282) [user] is_delimiter(a)
   Call: (283) [system] arg(_282688, v('(', ')', end_of_file), a)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275182)
   Call: (282) [system] ')'==a
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275182)
   Call: (282) [system] get_char((0x55aefe44e2f0), a)
   Exit: (282) [system] get_char((0x55aefe44e2f0), a)
   Call: (282) [system] a=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275182)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _290054)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _290054)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _291920)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (283) [user] is_delimiter(t)
^  Unify: (283) [user] is_delimiter(t)
   Call: (284) [system] char_type(t, space)
^  Redo: (283) [user] is_delimiter(t)
   Call: (284) [system] arg(_297560, v('(', ')', end_of_file), t)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _290054)
   Call: (283) [system] ')'==t
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _290054)
   Call: (283) [system] get_char((0x55aefe44e2f0), t)
   Exit: (283) [system] get_char((0x55aefe44e2f0), t)
   Call: (283) [system] t=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _290054)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _304926)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _304926)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _306792)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (284) [user] is_delimiter(o)
^  Unify: (284) [user] is_delimiter(o)
   Call: (285) [system] char_type(o, space)
^  Redo: (284) [user] is_delimiter(o)
   Call: (285) [system] arg(_312432, v('(', ')', end_of_file), o)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _304926)
   Call: (284) [system] ')'==o
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _304926)
   Call: (284) [system] get_char((0x55aefe44e2f0), o)
   Exit: (284) [system] get_char((0x55aefe44e2f0), o)
   Call: (284) [system] o=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _304926)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _319798)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _319798)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _321664)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (285) [user] is_delimiter(m)
^  Unify: (285) [user] is_delimiter(m)
   Call: (286) [system] char_type(m, space)
^  Redo: (285) [user] is_delimiter(m)
   Call: (286) [system] arg(_327304, v('(', ')', end_of_file), m)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _319798)
   Call: (285) [system] ')'==m
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _319798)
   Call: (285) [system] get_char((0x55aefe44e2f0), m)
   Exit: (285) [system] get_char((0x55aefe44e2f0), m)
   Call: (285) [system] m=(\)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _319798)
^  Call: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _334670)
^  Unify: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _334670)
   Call: (286) [system] peek_char((0x55aefe44e2f0), _336536)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (286) [user] is_delimiter(' ')
^  Unify: (286) [user] is_delimiter(' ')
   Call: (287) [system] char_type(' ', space)
   Exit: (287) [system] char_type(' ', space)
^  Exit: (286) [user] is_delimiter(' ')
   Call: (286) [system] _334670=[]
   Exit: (286) [system] []=[]
^  Exit: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (285) [system] _319798=[m]
   Exit: (285) [system] [m]=[m]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (284) [system] _304926=[o, m]
   Exit: (284) [system] [o, m]=[o, m]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (283) [system] _290054=[t, o, m]
   Exit: (283) [system] [t, o, m]=[t, o, m]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
   Call: (282) [system] _275182=[a, t, o, m]
   Exit: (282) [system] [a, t, o, m]=[a, t, o, m]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, t, o, m])
^  Call: (281) [user] classify_and_convert_charseq($, [a, t, o, m], _236074)
^  Unify: (281) [user] classify_and_convert_charseq($, [a, t, o, m], '$VAR'(_357920))
   Call: (282) [system] atom_chars(_357920, ['_', a, t, o, m])
   Exit: (282) [system] atom_chars('_atom', ['_', a, t, o, m])
^  Exit: (281) [user] classify_and_convert_charseq($, [a, t, o, m], _atom)
^  Exit: (280) [user] read_symbolic(')', (0x55aefe44e2f0), $, _atom)
^  Exit: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _atom)
^  Call: (279) [user] read_list(')', (0x55aefe44e2f0), _363516)
^  Unify: (279) [user] read_list(')', (0x55aefe44e2f0), _363516)
^  Call: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (281) [system] peek_char((0x55aefe44e2f0), _367230)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (281) [system] ' '=(;)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (281) [user] is_like_space(' ')
^  Unify: (281) [user] is_like_space(' ')
   Call: (282) [system] char_type(' ', 'white')
   Exit: (282) [system] char_type(' ', 'white')
^  Exit: (281) [user] is_like_space(' ')
   Call: (281) [system] get_char((0x55aefe44e2f0), _375888)
   Exit: (281) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (281) [user] skip_spaces((0x55aefe44e2f0))
   Call: (282) [system] peek_char((0x55aefe44e2f0), _379516)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (282) [system] '('=(;)
^  Redo: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (282) [user] is_like_space('(')
^  Unify: (282) [user] is_like_space('(')
   Call: (283) [system] char_type('(', 'white')
^  Redo: (282) [user] is_like_space('(')
^  Unify: (282) [user] is_like_space('(')
   Call: (283) [system] char_type('(', end_of_line)
^  Redo: (282) [user] is_like_space('(')
^  Unify: (282) [user] is_like_space('(')
   Call: (283) [system] char_type('(', space)
^  Redo: (282) [user] is_like_space('(')
^  Unify: (282) [user] is_like_space('(')
   Call: (283) [system] char_type('(', cntrl)
^  Redo: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] peek_char((0x55aefe44e2f0), _397224)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (280) [system] '('=')'
^  Redo: (279) [user] read_list(')', (0x55aefe44e2f0), _363516)
   Call: (280) [system] '('=end_of_file
^  Redo: (279) [user] read_list(')', (0x55aefe44e2f0), _363516)
^  Call: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), _402802)
^  Unify: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), _402802)
^  Call: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (281) [user] skip_spaces((0x55aefe44e2f0))
   Call: (282) [system] peek_char((0x55aefe44e2f0), _406516)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (282) [system] '('=(;)
^  Redo: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (282) [user] is_like_space('(')
^  Unify: (282) [user] is_like_space('(')
   Call: (283) [system] char_type('(', 'white')
^  Redo: (282) [user] is_like_space('(')
^  Unify: (282) [user] is_like_space('(')
   Call: (283) [system] char_type('(', end_of_line)
^  Redo: (282) [user] is_like_space('(')
^  Unify: (282) [user] is_like_space('(')
   Call: (283) [system] char_type('(', space)
^  Redo: (282) [user] is_like_space('(')
^  Unify: (282) [user] is_like_space('(')
   Call: (283) [system] char_type('(', cntrl)
^  Redo: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (281) [user] skip_spaces((0x55aefe44e2f0))
   Call: (281) [system] get_char((0x55aefe44e2f0), _423300)
   Exit: (281) [system] get_char((0x55aefe44e2f0), '(')
   Call: (281) [system] '('='('
   Exit: (281) [system] '('='('
^  Call: (281) [user] read_list(')', (0x55aefe44e2f0), _402802)
^  Unify: (281) [user] read_list(')', (0x55aefe44e2f0), _402802)
^  Call: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (283) [system] peek_char((0x55aefe44e2f0), _430726)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (283) [system] ')'=(;)
^  Redo: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (283) [user] is_like_space(')')
^  Unify: (283) [user] is_like_space(')')
   Call: (284) [system] char_type(')', 'white')
^  Redo: (283) [user] is_like_space(')')
^  Unify: (283) [user] is_like_space(')')
   Call: (284) [system] char_type(')', end_of_line)
^  Redo: (283) [user] is_like_space(')')
^  Unify: (283) [user] is_like_space(')')
   Call: (284) [system] char_type(')', space)
^  Redo: (283) [user] is_like_space(')')
^  Unify: (283) [user] is_like_space(')')
   Call: (284) [system] char_type(')', cntrl)
^  Redo: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (282) [system] peek_char((0x55aefe44e2f0), _447510)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (282) [system] ')'=')'
   Exit: (282) [system] ')'=')'
   Call: (282) [system] get_char((0x55aefe44e2f0), _451300)
   Exit: (282) [system] get_char((0x55aefe44e2f0), ')')
   Call: (282) [system] _402802=[]
   Exit: (282) [system] []=[]
^  Exit: (281) [user] read_list(')', (0x55aefe44e2f0), [])
^  Exit: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), [])
^  Call: (280) [user] read_list(')', (0x55aefe44e2f0), _456800)
^  Unify: (280) [user] read_list(')', (0x55aefe44e2f0), _456800)
^  Call: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (281) [user] skip_spaces((0x55aefe44e2f0))
   Call: (282) [system] peek_char((0x55aefe44e2f0), _460514)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (282) [system] '\n'=(;)
^  Redo: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (282) [user] is_like_space('\n')
^  Unify: (282) [user] is_like_space('\n')
   Call: (283) [system] char_type('\n', 'white')
^  Redo: (282) [user] is_like_space('\n')
^  Unify: (282) [user] is_like_space('\n')
   Call: (283) [system] char_type('\n', end_of_line)
   Exit: (283) [system] char_type('\n', end_of_line)
^  Exit: (282) [user] is_like_space('\n')
   Call: (282) [system] get_char((0x55aefe44e2f0), _471826)
   Exit: (282) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (283) [system] peek_char((0x55aefe44e2f0), _475454)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (283) [system] ' '=(;)
^  Redo: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (283) [user] is_like_space(' ')
^  Unify: (283) [user] is_like_space(' ')
   Call: (284) [system] char_type(' ', 'white')
   Exit: (284) [system] char_type(' ', 'white')
^  Exit: (283) [user] is_like_space(' ')
   Call: (283) [system] get_char((0x55aefe44e2f0), _484112)
   Exit: (283) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (283) [user] skip_spaces((0x55aefe44e2f0))
   Call: (284) [system] peek_char((0x55aefe44e2f0), _487740)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (284) [system] ' '=(;)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (284) [user] is_like_space(' ')
^  Unify: (284) [user] is_like_space(' ')
   Call: (285) [system] char_type(' ', 'white')
   Exit: (285) [system] char_type(' ', 'white')
^  Exit: (284) [user] is_like_space(' ')
   Call: (284) [system] get_char((0x55aefe44e2f0), _496398)
   Exit: (284) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (284) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (284) [user] skip_spaces((0x55aefe44e2f0))
   Call: (285) [system] peek_char((0x55aefe44e2f0), _500026)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (285) [system] ' '=(;)
^  Redo: (284) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (285) [user] is_like_space(' ')
^  Unify: (285) [user] is_like_space(' ')
   Call: (286) [system] char_type(' ', 'white')
   Exit: (286) [system] char_type(' ', 'white')
^  Exit: (285) [user] is_like_space(' ')
   Call: (285) [system] get_char((0x55aefe44e2f0), _508684)
   Exit: (285) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (285) [user] skip_spaces((0x55aefe44e2f0))
   Call: (286) [system] peek_char((0x55aefe44e2f0), _512312)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (286) [system] ' '=(;)
^  Redo: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (286) [user] is_like_space(' ')
^  Unify: (286) [user] is_like_space(' ')
   Call: (287) [system] char_type(' ', 'white')
   Exit: (287) [system] char_type(' ', 'white')
^  Exit: (286) [user] is_like_space(' ')
   Call: (286) [system] get_char((0x55aefe44e2f0), _520970)
   Exit: (286) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (286) [user] skip_spaces((0x55aefe44e2f0))
   Call: (287) [system] peek_char((0x55aefe44e2f0), _6772)
   Exit: (287) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (287) [system] '('=(;)
^  Redo: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (287) [user] is_like_space('(')
^  Unify: (287) [user] is_like_space('(')
   Call: (288) [system] char_type('(', 'white')
^  Redo: (287) [user] is_like_space('(')
^  Unify: (287) [user] is_like_space('(')
   Call: (288) [system] char_type('(', end_of_line)
^  Redo: (287) [user] is_like_space('(')
^  Unify: (287) [user] is_like_space('(')
   Call: (288) [system] char_type('(', space)
^  Redo: (287) [user] is_like_space('(')
^  Unify: (287) [user] is_like_space('(')
   Call: (288) [system] char_type('(', cntrl)
^  Redo: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (284) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (281) [user] skip_spaces((0x55aefe44e2f0))
   Call: (281) [system] peek_char((0x55aefe44e2f0), _28176)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (281) [system] '('=')'
^  Redo: (280) [user] read_list(')', (0x55aefe44e2f0), _6096)
   Call: (281) [system] '('=end_of_file
^  Redo: (280) [user] read_list(')', (0x55aefe44e2f0), _6096)
^  Call: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _33754)
^  Unify: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _33754)
^  Call: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (283) [system] peek_char((0x55aefe44e2f0), _37468)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (283) [system] '('=(;)
^  Redo: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (283) [user] is_like_space('(')
^  Unify: (283) [user] is_like_space('(')
   Call: (284) [system] char_type('(', 'white')
^  Redo: (283) [user] is_like_space('(')
^  Unify: (283) [user] is_like_space('(')
   Call: (284) [system] char_type('(', end_of_line)
^  Redo: (283) [user] is_like_space('(')
^  Unify: (283) [user] is_like_space('(')
   Call: (284) [system] char_type('(', space)
^  Redo: (283) [user] is_like_space('(')
^  Unify: (283) [user] is_like_space('(')
   Call: (284) [system] char_type('(', cntrl)
^  Redo: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (282) [system] get_char((0x55aefe44e2f0), _54252)
   Exit: (282) [system] get_char((0x55aefe44e2f0), '(')
   Call: (282) [system] '('='('
   Exit: (282) [system] '('='('
^  Call: (282) [user] read_list(')', (0x55aefe44e2f0), _33754)
^  Unify: (282) [user] read_list(')', (0x55aefe44e2f0), _33754)
^  Call: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (283) [user] skip_spaces((0x55aefe44e2f0))
   Call: (284) [system] peek_char((0x55aefe44e2f0), _61678)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), r)
   Call: (284) [system] r=(;)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (284) [user] is_like_space(r)
^  Unify: (284) [user] is_like_space(r)
   Call: (285) [system] char_type(r, 'white')
^  Redo: (284) [user] is_like_space(r)
^  Unify: (284) [user] is_like_space(r)
   Call: (285) [system] char_type(r, end_of_line)
^  Redo: (284) [user] is_like_space(r)
^  Unify: (284) [user] is_like_space(r)
   Call: (285) [system] char_type(r, space)
^  Redo: (284) [user] is_like_space(r)
^  Unify: (284) [user] is_like_space(r)
   Call: (285) [system] char_type(r, cntrl)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (283) [user] skip_spaces((0x55aefe44e2f0))
   Call: (283) [system] peek_char((0x55aefe44e2f0), _78462)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), r)
   Call: (283) [system] r=')'
^  Redo: (282) [user] read_list(')', (0x55aefe44e2f0), _33754)
   Call: (283) [system] r=end_of_file
^  Redo: (282) [user] read_list(')', (0x55aefe44e2f0), _33754)
^  Call: (283) [user] cont_sexpr(')', (0x55aefe44e2f0), _84040)
^  Unify: (283) [user] cont_sexpr(')', (0x55aefe44e2f0), _84040)
^  Call: (284) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (284) [user] skip_spaces((0x55aefe44e2f0))
   Call: (285) [system] peek_char((0x55aefe44e2f0), _87754)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), r)
   Call: (285) [system] r=(;)
^  Redo: (284) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (285) [user] is_like_space(r)
^  Unify: (285) [user] is_like_space(r)
   Call: (286) [system] char_type(r, 'white')
^  Redo: (285) [user] is_like_space(r)
^  Unify: (285) [user] is_like_space(r)
   Call: (286) [system] char_type(r, end_of_line)
^  Redo: (285) [user] is_like_space(r)
^  Unify: (285) [user] is_like_space(r)
   Call: (286) [system] char_type(r, space)
^  Redo: (285) [user] is_like_space(r)
^  Unify: (285) [user] is_like_space(r)
   Call: (286) [system] char_type(r, cntrl)
^  Redo: (284) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (284) [user] skip_spaces((0x55aefe44e2f0))
   Call: (284) [system] get_char((0x55aefe44e2f0), _104538)
   Exit: (284) [system] get_char((0x55aefe44e2f0), r)
   Call: (284) [system] r='('
^  Redo: (283) [user] cont_sexpr(')', (0x55aefe44e2f0), _84040)
   Call: (284) [system] r='['
^  Redo: (283) [user] cont_sexpr(')', (0x55aefe44e2f0), _84040)
   Call: (284) [system] r='{'
^  Redo: (283) [user] cont_sexpr(')', (0x55aefe44e2f0), _84040)
   Call: (284) [system] r='"'
^  Redo: (283) [user] cont_sexpr(')', (0x55aefe44e2f0), _84040)
   Call: (284) [system] r=!
^  Redo: (283) [user] cont_sexpr(')', (0x55aefe44e2f0), _84040)
   Call: (284) [system] r='\''
^  Redo: (283) [user] cont_sexpr(')', (0x55aefe44e2f0), _84040)
   Call: (284) [system] r='`'
^  Redo: (283) [user] cont_sexpr(')', (0x55aefe44e2f0), _84040)
   Call: (284) [system] r=end_of_file
^  Redo: (283) [user] cont_sexpr(')', (0x55aefe44e2f0), _84040)
^  Call: (284) [user] read_symbolic(')', (0x55aefe44e2f0), r, _84040)
^  Unify: (284) [user] read_symbolic(')', (0x55aefe44e2f0), r, _84040)
^  Call: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _123148)
^  Unify: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _123148)
   Call: (286) [system] peek_char((0x55aefe44e2f0), _125014)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (286) [user] is_delimiter(e)
^  Unify: (286) [user] is_delimiter(e)
   Call: (287) [system] char_type(e, space)
^  Redo: (286) [user] is_delimiter(e)
   Call: (287) [system] arg(_130654, v('(', ')', end_of_file), e)
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _123148)
   Call: (286) [system] ')'==e
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _123148)
   Call: (286) [system] get_char((0x55aefe44e2f0), e)
   Exit: (286) [system] get_char((0x55aefe44e2f0), e)
   Call: (286) [system] e=(\)
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _123148)
^  Call: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _138020)
^  Unify: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _138020)
   Call: (287) [system] peek_char((0x55aefe44e2f0), _139886)
   Exit: (287) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (287) [user] is_delimiter(t)
^  Unify: (287) [user] is_delimiter(t)
   Call: (288) [system] char_type(t, space)
^  Redo: (287) [user] is_delimiter(t)
   Call: (288) [system] arg(_145526, v('(', ')', end_of_file), t)
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _138020)
   Call: (287) [system] ')'==t
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _138020)
   Call: (287) [system] get_char((0x55aefe44e2f0), t)
   Exit: (287) [system] get_char((0x55aefe44e2f0), t)
   Call: (287) [system] t=(\)
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _138020)
^  Call: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152892)
^  Unify: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152892)
   Call: (288) [system] peek_char((0x55aefe44e2f0), _154758)
   Exit: (288) [system] peek_char((0x55aefe44e2f0), u)
^  Call: (288) [user] is_delimiter(u)
^  Unify: (288) [user] is_delimiter(u)
   Call: (289) [system] char_type(u, space)
^  Redo: (288) [user] is_delimiter(u)
   Call: (289) [system] arg(_160398, v('(', ')', end_of_file), u)
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152892)
   Call: (288) [system] ')'==u
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152892)
   Call: (288) [system] get_char((0x55aefe44e2f0), u)
   Exit: (288) [system] get_char((0x55aefe44e2f0), u)
   Call: (288) [system] u=(\)
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152892)
^  Call: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _167764)
^  Unify: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _167764)
   Call: (289) [system] peek_char((0x55aefe44e2f0), _169630)
   Exit: (289) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (289) [user] is_delimiter(r)
^  Unify: (289) [user] is_delimiter(r)
   Call: (290) [system] char_type(r, space)
^  Redo: (289) [user] is_delimiter(r)
   Call: (290) [system] arg(_175270, v('(', ')', end_of_file), r)
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _167764)
   Call: (289) [system] ')'==r
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _167764)
   Call: (289) [system] get_char((0x55aefe44e2f0), r)
   Exit: (289) [system] get_char((0x55aefe44e2f0), r)
   Call: (289) [system] r=(\)
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _167764)
^  Call: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _182636)
^  Unify: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _182636)
   Call: (290) [system] peek_char((0x55aefe44e2f0), _184502)
   Exit: (290) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (290) [user] is_delimiter(n)
^  Unify: (290) [user] is_delimiter(n)
   Call: (291) [system] char_type(n, space)
^  Redo: (290) [user] is_delimiter(n)
   Call: (291) [system] arg(_190142, v('(', ')', end_of_file), n)
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _182636)
   Call: (290) [system] ')'==n
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _182636)
   Call: (290) [system] get_char((0x55aefe44e2f0), n)
   Exit: (290) [system] get_char((0x55aefe44e2f0), n)
   Call: (290) [system] n=(\)
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _182636)
^  Call: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _197508)
^  Unify: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _197508)
   Call: (291) [system] peek_char((0x55aefe44e2f0), _199374)
   Exit: (291) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (291) [user] is_delimiter(' ')
^  Unify: (291) [user] is_delimiter(' ')
   Call: (292) [system] char_type(' ', space)
   Exit: (292) [system] char_type(' ', space)
^  Exit: (291) [user] is_delimiter(' ')
   Call: (291) [system] _197508=[]
   Exit: (291) [system] []=[]
^  Exit: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (290) [system] _182636=[n]
   Exit: (290) [system] [n]=[n]
^  Exit: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (289) [system] _167764=[r, n]
   Exit: (289) [system] [r, n]=[r, n]
^  Exit: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, n])
   Call: (288) [system] _152892=[u, r, n]
   Exit: (288) [system] [u, r, n]=[u, r, n]
^  Exit: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [u, r, n])
   Call: (287) [system] _138020=[t, u, r, n]
   Exit: (287) [system] [t, u, r, n]=[t, u, r, n]
^  Exit: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, u, r, n])
   Call: (286) [system] _123148=[e, t, u, r, n]
   Exit: (286) [system] [e, t, u, r, n]=[e, t, u, r, n]
^  Exit: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, t, u, r, n])
^  Call: (285) [user] classify_and_convert_charseq(r, [e, t, u, r, n], _84040)
^  Unify: (285) [user] classify_and_convert_charseq(r, [e, t, u, r, n], _84040)
^  Call: (287) [system] setup_call_cleanup('$notrace'(_224510, _224512), once(user:catch(read_from_chars([r, e, t, u, r, n], _84040), _224486, fail)), '$restore_trace'(_224510, _224512))
^  Unify: (287) [system] setup_call_cleanup(system:'$notrace'(_224510, _224512), system:once(user:catch(read_from_chars([r, e, t, u, r, n], _84040), _224486, fail)), system:'$restore_trace'(_224510, _224512))
^  Call: (288) [system] sig_atomic(system:'$notrace'(_224510, _224512))
^  Exit: (287) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([r, e, t, u, r, n], return), _224486, fail)), system:'$restore_trace'(3, -1))
   Call: (286) [system] atomic(return)
   Exit: (286) [system] atomic(return)
^  Exit: (285) [user] classify_and_convert_charseq(r, [e, t, u, r, n], return)
^  Exit: (284) [user] read_symbolic(')', (0x55aefe44e2f0), r, return)
^  Exit: (283) [user] cont_sexpr(')', (0x55aefe44e2f0), return)
^  Call: (283) [user] read_list(')', (0x55aefe44e2f0), _232948)
^  Unify: (283) [user] read_list(')', (0x55aefe44e2f0), _232948)
^  Call: (284) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (284) [user] skip_spaces((0x55aefe44e2f0))
   Call: (285) [system] peek_char((0x55aefe44e2f0), _236662)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (285) [system] ' '=(;)
^  Redo: (284) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (285) [user] is_like_space(' ')
^  Unify: (285) [user] is_like_space(' ')
   Call: (286) [system] char_type(' ', 'white')
   Exit: (286) [system] char_type(' ', 'white')
^  Exit: (285) [user] is_like_space(' ')
   Call: (285) [system] get_char((0x55aefe44e2f0), _245320)
   Exit: (285) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (285) [user] skip_spaces((0x55aefe44e2f0))
   Call: (286) [system] peek_char((0x55aefe44e2f0), _248948)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), $)
   Call: (286) [system] ($)=(;)
^  Redo: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (286) [user] is_like_space($)
^  Unify: (286) [user] is_like_space($)
   Call: (287) [system] char_type($, 'white')
^  Redo: (286) [user] is_like_space($)
^  Unify: (286) [user] is_like_space($)
   Call: (287) [system] char_type($, end_of_line)
^  Redo: (286) [user] is_like_space($)
^  Unify: (286) [user] is_like_space($)
   Call: (287) [system] char_type($, space)
^  Redo: (286) [user] is_like_space($)
^  Unify: (286) [user] is_like_space($)
   Call: (287) [system] char_type($, cntrl)
^  Redo: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (284) [user] skip_spaces((0x55aefe44e2f0))
   Call: (284) [system] peek_char((0x55aefe44e2f0), _266656)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), $)
   Call: (284) [system] ($)=')'
^  Redo: (283) [user] read_list(')', (0x55aefe44e2f0), _232948)
   Call: (284) [system] ($)=end_of_file
^  Redo: (283) [user] read_list(')', (0x55aefe44e2f0), _232948)
^  Call: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _272234)
^  Unify: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _272234)
^  Call: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (285) [user] skip_spaces((0x55aefe44e2f0))
   Call: (286) [system] peek_char((0x55aefe44e2f0), _275948)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), $)
   Call: (286) [system] ($)=(;)
^  Redo: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (286) [user] is_like_space($)
^  Unify: (286) [user] is_like_space($)
   Call: (287) [system] char_type($, 'white')
^  Redo: (286) [user] is_like_space($)
^  Unify: (286) [user] is_like_space($)
   Call: (287) [system] char_type($, end_of_line)
^  Redo: (286) [user] is_like_space($)
^  Unify: (286) [user] is_like_space($)
   Call: (287) [system] char_type($, space)
^  Redo: (286) [user] is_like_space($)
^  Unify: (286) [user] is_like_space($)
   Call: (287) [system] char_type($, cntrl)
^  Redo: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (285) [user] skip_spaces((0x55aefe44e2f0))
   Call: (285) [system] get_char((0x55aefe44e2f0), _292732)
   Exit: (285) [system] get_char((0x55aefe44e2f0), $)
   Call: (285) [system] ($)='('
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _272234)
   Call: (285) [system] ($)='['
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _272234)
   Call: (285) [system] ($)='{'
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _272234)
   Call: (285) [system] ($)='"'
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _272234)
   Call: (285) [system] ($)=!
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _272234)
   Call: (285) [system] ($)='\''
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _272234)
   Call: (285) [system] ($)='`'
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _272234)
   Call: (285) [system] ($)=end_of_file
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _272234)
^  Call: (285) [user] read_symbolic(')', (0x55aefe44e2f0), $, _272234)
^  Unify: (285) [user] read_symbolic(')', (0x55aefe44e2f0), $, _272234)
^  Call: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _311342)
^  Unify: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _311342)
   Call: (287) [system] peek_char((0x55aefe44e2f0), _313208)
   Exit: (287) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (287) [user] is_delimiter(e)
^  Unify: (287) [user] is_delimiter(e)
   Call: (288) [system] char_type(e, space)
^  Redo: (287) [user] is_delimiter(e)
   Call: (288) [system] arg(_318848, v('(', ')', end_of_file), e)
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _311342)
   Call: (287) [system] ')'==e
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _311342)
   Call: (287) [system] get_char((0x55aefe44e2f0), e)
   Exit: (287) [system] get_char((0x55aefe44e2f0), e)
   Call: (287) [system] e=(\)
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _311342)
^  Call: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _326214)
^  Unify: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _326214)
   Call: (288) [system] peek_char((0x55aefe44e2f0), _328080)
   Exit: (288) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (288) [user] is_delimiter(l)
^  Unify: (288) [user] is_delimiter(l)
   Call: (289) [system] char_type(l, space)
^  Redo: (288) [user] is_delimiter(l)
   Call: (289) [system] arg(_333720, v('(', ')', end_of_file), l)
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _326214)
   Call: (288) [system] ')'==l
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _326214)
   Call: (288) [system] get_char((0x55aefe44e2f0), l)
   Exit: (288) [system] get_char((0x55aefe44e2f0), l)
   Call: (288) [system] l=(\)
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _326214)
^  Call: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _341086)
^  Unify: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _341086)
   Call: (289) [system] peek_char((0x55aefe44e2f0), _342952)
   Exit: (289) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (289) [user] is_delimiter(s)
^  Unify: (289) [user] is_delimiter(s)
   Call: (290) [system] char_type(s, space)
^  Redo: (289) [user] is_delimiter(s)
   Call: (290) [system] arg(_348592, v('(', ')', end_of_file), s)
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _341086)
   Call: (289) [system] ')'==s
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _341086)
   Call: (289) [system] get_char((0x55aefe44e2f0), s)
   Exit: (289) [system] get_char((0x55aefe44e2f0), s)
   Call: (289) [system] s=(\)
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _341086)
^  Call: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _355958)
^  Unify: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _355958)
   Call: (290) [system] peek_char((0x55aefe44e2f0), _357824)
   Exit: (290) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (290) [user] is_delimiter(e)
^  Unify: (290) [user] is_delimiter(e)
   Call: (291) [system] char_type(e, space)
^  Redo: (290) [user] is_delimiter(e)
   Call: (291) [system] arg(_363464, v('(', ')', end_of_file), e)
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _355958)
   Call: (290) [system] ')'==e
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _355958)
   Call: (290) [system] get_char((0x55aefe44e2f0), e)
   Exit: (290) [system] get_char((0x55aefe44e2f0), e)
   Call: (290) [system] e=(\)
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _355958)
^  Call: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _370830)
^  Unify: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _370830)
   Call: (291) [system] peek_char((0x55aefe44e2f0), _372696)
   Exit: (291) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (291) [user] is_delimiter(')')
^  Unify: (291) [user] is_delimiter(')')
   Call: (292) [system] char_type(')', space)
^  Redo: (291) [user] is_delimiter(')')
   Call: (292) [system] arg(_378336, v('(', ')', end_of_file), ')')
   Exit: (292) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (291) [user] is_delimiter(')')
   Call: (291) [system] _370830=[]
   Exit: (291) [system] []=[]
^  Exit: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (290) [system] _355958=[e]
   Exit: (290) [system] [e]=[e]
^  Exit: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e])
   Call: (289) [system] _341086=[s, e]
   Exit: (289) [system] [s, e]=[s, e]
^  Exit: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, e])
   Call: (288) [system] _326214=[l, s, e]
   Exit: (288) [system] [l, s, e]=[l, s, e]
^  Exit: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l, s, e])
   Call: (287) [system] _311342=[e, l, s, e]
   Exit: (287) [system] [e, l, s, e]=[e, l, s, e]
^  Exit: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, l, s, e])
^  Call: (286) [user] classify_and_convert_charseq($, [e, l, s, e], _272234)
^  Unify: (286) [user] classify_and_convert_charseq($, [e, l, s, e], '$VAR'(_395948))
   Call: (287) [system] atom_chars(_395948, ['_', e, l, s, e])
   Exit: (287) [system] atom_chars('_else', ['_', e, l, s, e])
^  Exit: (286) [user] classify_and_convert_charseq($, [e, l, s, e], _else)
^  Exit: (285) [user] read_symbolic(')', (0x55aefe44e2f0), $, _else)
^  Exit: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _else)
^  Call: (284) [user] read_list(')', (0x55aefe44e2f0), _401544)
^  Unify: (284) [user] read_list(')', (0x55aefe44e2f0), _401544)
^  Call: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (285) [user] skip_spaces((0x55aefe44e2f0))
   Call: (286) [system] peek_char((0x55aefe44e2f0), _405258)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (286) [system] ')'=(;)
^  Redo: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (286) [user] is_like_space(')')
^  Unify: (286) [user] is_like_space(')')
   Call: (287) [system] char_type(')', 'white')
^  Redo: (286) [user] is_like_space(')')
^  Unify: (286) [user] is_like_space(')')
   Call: (287) [system] char_type(')', end_of_line)
^  Redo: (286) [user] is_like_space(')')
^  Unify: (286) [user] is_like_space(')')
   Call: (287) [system] char_type(')', space)
^  Redo: (286) [user] is_like_space(')')
^  Unify: (286) [user] is_like_space(')')
   Call: (287) [system] char_type(')', cntrl)
^  Redo: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (285) [user] skip_spaces((0x55aefe44e2f0))
   Call: (285) [system] peek_char((0x55aefe44e2f0), _422042)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (285) [system] ')'=')'
   Exit: (285) [system] ')'=')'
   Call: (285) [system] get_char((0x55aefe44e2f0), _425832)
   Exit: (285) [system] get_char((0x55aefe44e2f0), ')')
   Call: (285) [system] _401544=[]
   Exit: (285) [system] []=[]
^  Exit: (284) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (284) [system] _232948=[_else]
   Exit: (284) [system] [_else]=[_else]
^  Exit: (283) [user] read_list(')', (0x55aefe44e2f0), [_else])
   Call: (283) [system] _33754=[return, _else]
   Exit: (283) [system] [return, _else]=[return, _else]
^  Exit: (282) [user] read_list(')', (0x55aefe44e2f0), [return, _else])
^  Exit: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), [return, _else])
^  Call: (281) [user] read_list(')', (0x55aefe44e2f0), _436920)
^  Unify: (281) [user] read_list(')', (0x55aefe44e2f0), _436920)
^  Call: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (283) [system] peek_char((0x55aefe44e2f0), _440634)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (283) [system] '\n'=(;)
^  Redo: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (283) [user] is_like_space('\n')
^  Unify: (283) [user] is_like_space('\n')
   Call: (284) [system] char_type('\n', 'white')
^  Redo: (283) [user] is_like_space('\n')
^  Unify: (283) [user] is_like_space('\n')
   Call: (284) [system] char_type('\n', end_of_line)
   Exit: (284) [system] char_type('\n', end_of_line)
^  Exit: (283) [user] is_like_space('\n')
   Call: (283) [system] get_char((0x55aefe44e2f0), _451946)
   Exit: (283) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (283) [user] skip_spaces((0x55aefe44e2f0))
   Call: (284) [system] peek_char((0x55aefe44e2f0), _455574)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (284) [system] ' '=(;)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (284) [user] is_like_space(' ')
^  Unify: (284) [user] is_like_space(' ')
   Call: (285) [system] char_type(' ', 'white')
   Exit: (285) [system] char_type(' ', 'white')
^  Exit: (284) [user] is_like_space(' ')
   Call: (284) [system] get_char((0x55aefe44e2f0), _464232)
   Exit: (284) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (284) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (284) [user] skip_spaces((0x55aefe44e2f0))
   Call: (285) [system] peek_char((0x55aefe44e2f0), _467860)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (285) [system] ' '=(;)
^  Redo: (284) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (285) [user] is_like_space(' ')
^  Unify: (285) [user] is_like_space(' ')
   Call: (286) [system] char_type(' ', 'white')
   Exit: (286) [system] char_type(' ', 'white')
^  Exit: (285) [user] is_like_space(' ')
   Call: (285) [system] get_char((0x55aefe44e2f0), _476518)
   Exit: (285) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (285) [user] skip_spaces((0x55aefe44e2f0))
   Call: (286) [system] peek_char((0x55aefe44e2f0), _480146)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (286) [system] ' '=(;)
^  Redo: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (286) [user] is_like_space(' ')
^  Unify: (286) [user] is_like_space(' ')
   Call: (287) [system] char_type(' ', 'white')
   Exit: (287) [system] char_type(' ', 'white')
^  Exit: (286) [user] is_like_space(' ')
   Call: (286) [system] get_char((0x55aefe44e2f0), _488804)
   Exit: (286) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (286) [user] skip_spaces((0x55aefe44e2f0))
   Call: (287) [system] peek_char((0x55aefe44e2f0), _492432)
   Exit: (287) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (287) [system] ' '=(;)
^  Redo: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (287) [user] is_like_space(' ')
^  Unify: (287) [user] is_like_space(' ')
   Call: (288) [system] char_type(' ', 'white')
   Exit: (288) [system] char_type(' ', 'white')
^  Exit: (287) [user] is_like_space(' ')
   Call: (287) [system] get_char((0x55aefe44e2f0), _501090)
   Exit: (287) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (287) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (287) [user] skip_spaces((0x55aefe44e2f0))
   Call: (288) [system] peek_char((0x55aefe44e2f0), _504718)
   Exit: (288) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (288) [system] '('=(;)
^  Redo: (287) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (288) [user] is_like_space('(')
^  Unify: (288) [user] is_like_space('(')
   Call: (289) [system] char_type('(', 'white')
^  Redo: (288) [user] is_like_space('(')
^  Unify: (288) [user] is_like_space('(')
   Call: (289) [system] char_type('(', end_of_line)
^  Redo: (288) [user] is_like_space('(')
^  Unify: (288) [user] is_like_space('(')
   Call: (289) [system] char_type('(', space)
^  Redo: (288) [user] is_like_space('(')
^  Unify: (288) [user] is_like_space('(')
   Call: (289) [system] char_type('(', cntrl)
^  Redo: (287) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (287) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (284) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (282) [system] peek_char((0x55aefe44e2f0), _8324)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (282) [system] '('=')'
^  Redo: (281) [user] read_list(')', (0x55aefe44e2f0), _6118)
   Call: (282) [system] '('=end_of_file
^  Redo: (281) [user] read_list(')', (0x55aefe44e2f0), _6118)
^  Call: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _13902)
^  Unify: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _13902)
^  Call: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (283) [user] skip_spaces((0x55aefe44e2f0))
   Call: (284) [system] peek_char((0x55aefe44e2f0), _17616)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (284) [system] '('=(;)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (284) [user] is_like_space('(')
^  Unify: (284) [user] is_like_space('(')
   Call: (285) [system] char_type('(', 'white')
^  Redo: (284) [user] is_like_space('(')
^  Unify: (284) [user] is_like_space('(')
   Call: (285) [system] char_type('(', end_of_line)
^  Redo: (284) [user] is_like_space('(')
^  Unify: (284) [user] is_like_space('(')
   Call: (285) [system] char_type('(', space)
^  Redo: (284) [user] is_like_space('(')
^  Unify: (284) [user] is_like_space('(')
   Call: (285) [system] char_type('(', cntrl)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (283) [user] skip_spaces((0x55aefe44e2f0))
   Call: (283) [system] get_char((0x55aefe44e2f0), _34400)
   Exit: (283) [system] get_char((0x55aefe44e2f0), '(')
   Call: (283) [system] '('='('
   Exit: (283) [system] '('='('
^  Call: (283) [user] read_list(')', (0x55aefe44e2f0), _13902)
^  Unify: (283) [user] read_list(')', (0x55aefe44e2f0), _13902)
^  Call: (284) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (284) [user] skip_spaces((0x55aefe44e2f0))
   Call: (285) [system] peek_char((0x55aefe44e2f0), _41826)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), c)
   Call: (285) [system] c=(;)
^  Redo: (284) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (285) [user] is_like_space(c)
^  Unify: (285) [user] is_like_space(c)
   Call: (286) [system] char_type(c, 'white')
^  Redo: (285) [user] is_like_space(c)
^  Unify: (285) [user] is_like_space(c)
   Call: (286) [system] char_type(c, end_of_line)
^  Redo: (285) [user] is_like_space(c)
^  Unify: (285) [user] is_like_space(c)
   Call: (286) [system] char_type(c, space)
^  Redo: (285) [user] is_like_space(c)
^  Unify: (285) [user] is_like_space(c)
   Call: (286) [system] char_type(c, cntrl)
^  Redo: (284) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (284) [user] skip_spaces((0x55aefe44e2f0))
   Call: (284) [system] peek_char((0x55aefe44e2f0), _58610)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), c)
   Call: (284) [system] c=')'
^  Redo: (283) [user] read_list(')', (0x55aefe44e2f0), _13902)
   Call: (284) [system] c=end_of_file
^  Redo: (283) [user] read_list(')', (0x55aefe44e2f0), _13902)
^  Call: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _64188)
^  Unify: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _64188)
^  Call: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (285) [user] skip_spaces((0x55aefe44e2f0))
   Call: (286) [system] peek_char((0x55aefe44e2f0), _67902)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), c)
   Call: (286) [system] c=(;)
^  Redo: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (286) [user] is_like_space(c)
^  Unify: (286) [user] is_like_space(c)
   Call: (287) [system] char_type(c, 'white')
^  Redo: (286) [user] is_like_space(c)
^  Unify: (286) [user] is_like_space(c)
   Call: (287) [system] char_type(c, end_of_line)
^  Redo: (286) [user] is_like_space(c)
^  Unify: (286) [user] is_like_space(c)
   Call: (287) [system] char_type(c, space)
^  Redo: (286) [user] is_like_space(c)
^  Unify: (286) [user] is_like_space(c)
   Call: (287) [system] char_type(c, cntrl)
^  Redo: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (285) [user] skip_spaces((0x55aefe44e2f0))
   Call: (285) [system] get_char((0x55aefe44e2f0), _84686)
   Exit: (285) [system] get_char((0x55aefe44e2f0), c)
   Call: (285) [system] c='('
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _64188)
   Call: (285) [system] c='['
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _64188)
   Call: (285) [system] c='{'
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _64188)
   Call: (285) [system] c='"'
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _64188)
   Call: (285) [system] c=!
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _64188)
   Call: (285) [system] c='\''
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _64188)
   Call: (285) [system] c='`'
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _64188)
   Call: (285) [system] c=end_of_file
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _64188)
^  Call: (285) [user] read_symbolic(')', (0x55aefe44e2f0), c, _64188)
^  Unify: (285) [user] read_symbolic(')', (0x55aefe44e2f0), c, _64188)
^  Call: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _103296)
^  Unify: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _103296)
   Call: (287) [system] peek_char((0x55aefe44e2f0), _105162)
   Exit: (287) [system] peek_char((0x55aefe44e2f0), h)
^  Call: (287) [user] is_delimiter(h)
^  Unify: (287) [user] is_delimiter(h)
   Call: (288) [system] char_type(h, space)
^  Redo: (287) [user] is_delimiter(h)
   Call: (288) [system] arg(_110802, v('(', ')', end_of_file), h)
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _103296)
   Call: (287) [system] ')'==h
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _103296)
   Call: (287) [system] get_char((0x55aefe44e2f0), h)
   Exit: (287) [system] get_char((0x55aefe44e2f0), h)
   Call: (287) [system] h=(\)
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _103296)
^  Call: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _118168)
^  Unify: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _118168)
   Call: (288) [system] peek_char((0x55aefe44e2f0), _120034)
   Exit: (288) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (288) [user] is_delimiter(a)
^  Unify: (288) [user] is_delimiter(a)
   Call: (289) [system] char_type(a, space)
^  Redo: (288) [user] is_delimiter(a)
   Call: (289) [system] arg(_125674, v('(', ')', end_of_file), a)
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _118168)
   Call: (288) [system] ')'==a
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _118168)
   Call: (288) [system] get_char((0x55aefe44e2f0), a)
   Exit: (288) [system] get_char((0x55aefe44e2f0), a)
   Call: (288) [system] a=(\)
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _118168)
^  Call: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _133040)
^  Unify: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _133040)
   Call: (289) [system] peek_char((0x55aefe44e2f0), _134906)
   Exit: (289) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (289) [user] is_delimiter(i)
^  Unify: (289) [user] is_delimiter(i)
   Call: (290) [system] char_type(i, space)
^  Redo: (289) [user] is_delimiter(i)
   Call: (290) [system] arg(_140546, v('(', ')', end_of_file), i)
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _133040)
   Call: (289) [system] ')'==i
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _133040)
   Call: (289) [system] get_char((0x55aefe44e2f0), i)
   Exit: (289) [system] get_char((0x55aefe44e2f0), i)
   Call: (289) [system] i=(\)
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _133040)
^  Call: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _147912)
^  Unify: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _147912)
   Call: (290) [system] peek_char((0x55aefe44e2f0), _149778)
   Exit: (290) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (290) [user] is_delimiter(n)
^  Unify: (290) [user] is_delimiter(n)
   Call: (291) [system] char_type(n, space)
^  Redo: (290) [user] is_delimiter(n)
   Call: (291) [system] arg(_155418, v('(', ')', end_of_file), n)
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _147912)
   Call: (290) [system] ')'==n
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _147912)
   Call: (290) [system] get_char((0x55aefe44e2f0), n)
   Exit: (290) [system] get_char((0x55aefe44e2f0), n)
   Call: (290) [system] n=(\)
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _147912)
^  Call: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _162784)
^  Unify: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _162784)
   Call: (291) [system] peek_char((0x55aefe44e2f0), _164650)
   Exit: (291) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (291) [user] is_delimiter(' ')
^  Unify: (291) [user] is_delimiter(' ')
   Call: (292) [system] char_type(' ', space)
   Exit: (292) [system] char_type(' ', space)
^  Exit: (291) [user] is_delimiter(' ')
   Call: (291) [system] _162784=[]
   Exit: (291) [system] []=[]
^  Exit: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (290) [system] _147912=[n]
   Exit: (290) [system] [n]=[n]
^  Exit: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (289) [system] _133040=[i, n]
   Exit: (289) [system] [i, n]=[i, n]
^  Exit: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, n])
   Call: (288) [system] _118168=[a, i, n]
   Exit: (288) [system] [a, i, n]=[a, i, n]
^  Exit: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, i, n])
   Call: (287) [system] _103296=[h, a, i, n]
   Exit: (287) [system] [h, a, i, n]=[h, a, i, n]
^  Exit: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [h, a, i, n])
^  Call: (286) [user] classify_and_convert_charseq(c, [h, a, i, n], _64188)
^  Unify: (286) [user] classify_and_convert_charseq(c, [h, a, i, n], _64188)
^  Call: (288) [system] setup_call_cleanup('$notrace'(_186992, _186994), once(user:catch(read_from_chars([c, h, a, i, n], _64188), _186968, fail)), '$restore_trace'(_186992, _186994))
^  Unify: (288) [system] setup_call_cleanup(system:'$notrace'(_186992, _186994), system:once(user:catch(read_from_chars([c, h, a, i, n], _64188), _186968, fail)), system:'$restore_trace'(_186992, _186994))
^  Call: (289) [system] sig_atomic(system:'$notrace'(_186992, _186994))
^  Exit: (288) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([c, h, a, i, n], chain), _186968, fail)), system:'$restore_trace'(3, -1))
   Call: (287) [system] atomic(chain)
   Exit: (287) [system] atomic(chain)
^  Exit: (286) [user] classify_and_convert_charseq(c, [h, a, i, n], chain)
^  Exit: (285) [user] read_symbolic(')', (0x55aefe44e2f0), c, chain)
^  Exit: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), chain)
^  Call: (284) [user] read_list(')', (0x55aefe44e2f0), _195430)
^  Unify: (284) [user] read_list(')', (0x55aefe44e2f0), _195430)
^  Call: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (285) [user] skip_spaces((0x55aefe44e2f0))
   Call: (286) [system] peek_char((0x55aefe44e2f0), _199144)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (286) [system] ' '=(;)
^  Redo: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (286) [user] is_like_space(' ')
^  Unify: (286) [user] is_like_space(' ')
   Call: (287) [system] char_type(' ', 'white')
   Exit: (287) [system] char_type(' ', 'white')
^  Exit: (286) [user] is_like_space(' ')
   Call: (286) [system] get_char((0x55aefe44e2f0), _207802)
   Exit: (286) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (286) [user] skip_spaces((0x55aefe44e2f0))
   Call: (287) [system] peek_char((0x55aefe44e2f0), _211430)
   Exit: (287) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (287) [system] '('=(;)
^  Redo: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (287) [user] is_like_space('(')
^  Unify: (287) [user] is_like_space('(')
   Call: (288) [system] char_type('(', 'white')
^  Redo: (287) [user] is_like_space('(')
^  Unify: (287) [user] is_like_space('(')
   Call: (288) [system] char_type('(', end_of_line)
^  Redo: (287) [user] is_like_space('(')
^  Unify: (287) [user] is_like_space('(')
   Call: (288) [system] char_type('(', space)
^  Redo: (287) [user] is_like_space('(')
^  Unify: (287) [user] is_like_space('(')
   Call: (288) [system] char_type('(', cntrl)
^  Redo: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (285) [user] skip_spaces((0x55aefe44e2f0))
   Call: (285) [system] peek_char((0x55aefe44e2f0), _229138)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (285) [system] '('=')'
^  Redo: (284) [user] read_list(')', (0x55aefe44e2f0), _195430)
   Call: (285) [system] '('=end_of_file
^  Redo: (284) [user] read_list(')', (0x55aefe44e2f0), _195430)
^  Call: (285) [user] cont_sexpr(')', (0x55aefe44e2f0), _234716)
^  Unify: (285) [user] cont_sexpr(')', (0x55aefe44e2f0), _234716)
^  Call: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (286) [user] skip_spaces((0x55aefe44e2f0))
   Call: (287) [system] peek_char((0x55aefe44e2f0), _238430)
   Exit: (287) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (287) [system] '('=(;)
^  Redo: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (287) [user] is_like_space('(')
^  Unify: (287) [user] is_like_space('(')
   Call: (288) [system] char_type('(', 'white')
^  Redo: (287) [user] is_like_space('(')
^  Unify: (287) [user] is_like_space('(')
   Call: (288) [system] char_type('(', end_of_line)
^  Redo: (287) [user] is_like_space('(')
^  Unify: (287) [user] is_like_space('(')
   Call: (288) [system] char_type('(', space)
^  Redo: (287) [user] is_like_space('(')
^  Unify: (287) [user] is_like_space('(')
   Call: (288) [system] char_type('(', cntrl)
^  Redo: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (286) [user] skip_spaces((0x55aefe44e2f0))
   Call: (286) [system] get_char((0x55aefe44e2f0), _255214)
   Exit: (286) [system] get_char((0x55aefe44e2f0), '(')
   Call: (286) [system] '('='('
   Exit: (286) [system] '('='('
^  Call: (286) [user] read_list(')', (0x55aefe44e2f0), _234716)
^  Unify: (286) [user] read_list(')', (0x55aefe44e2f0), _234716)
^  Call: (287) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (287) [user] skip_spaces((0x55aefe44e2f0))
   Call: (288) [system] peek_char((0x55aefe44e2f0), _262640)
   Exit: (288) [system] peek_char((0x55aefe44e2f0), d)
   Call: (288) [system] d=(;)
^  Redo: (287) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (288) [user] is_like_space(d)
^  Unify: (288) [user] is_like_space(d)
   Call: (289) [system] char_type(d, 'white')
^  Redo: (288) [user] is_like_space(d)
^  Unify: (288) [user] is_like_space(d)
   Call: (289) [system] char_type(d, end_of_line)
^  Redo: (288) [user] is_like_space(d)
^  Unify: (288) [user] is_like_space(d)
   Call: (289) [system] char_type(d, space)
^  Redo: (288) [user] is_like_space(d)
^  Unify: (288) [user] is_like_space(d)
   Call: (289) [system] char_type(d, cntrl)
^  Redo: (287) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (287) [user] skip_spaces((0x55aefe44e2f0))
   Call: (287) [system] peek_char((0x55aefe44e2f0), _279424)
   Exit: (287) [system] peek_char((0x55aefe44e2f0), d)
   Call: (287) [system] d=')'
^  Redo: (286) [user] read_list(')', (0x55aefe44e2f0), _234716)
   Call: (287) [system] d=end_of_file
^  Redo: (286) [user] read_list(')', (0x55aefe44e2f0), _234716)
^  Call: (287) [user] cont_sexpr(')', (0x55aefe44e2f0), _285002)
^  Unify: (287) [user] cont_sexpr(')', (0x55aefe44e2f0), _285002)
^  Call: (288) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (288) [user] skip_spaces((0x55aefe44e2f0))
   Call: (289) [system] peek_char((0x55aefe44e2f0), _288716)
   Exit: (289) [system] peek_char((0x55aefe44e2f0), d)
   Call: (289) [system] d=(;)
^  Redo: (288) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (289) [user] is_like_space(d)
^  Unify: (289) [user] is_like_space(d)
   Call: (290) [system] char_type(d, 'white')
^  Redo: (289) [user] is_like_space(d)
^  Unify: (289) [user] is_like_space(d)
   Call: (290) [system] char_type(d, end_of_line)
^  Redo: (289) [user] is_like_space(d)
^  Unify: (289) [user] is_like_space(d)
   Call: (290) [system] char_type(d, space)
^  Redo: (289) [user] is_like_space(d)
^  Unify: (289) [user] is_like_space(d)
   Call: (290) [system] char_type(d, cntrl)
^  Redo: (288) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (288) [user] skip_spaces((0x55aefe44e2f0))
   Call: (288) [system] get_char((0x55aefe44e2f0), _305500)
   Exit: (288) [system] get_char((0x55aefe44e2f0), d)
   Call: (288) [system] d='('
^  Redo: (287) [user] cont_sexpr(')', (0x55aefe44e2f0), _285002)
   Call: (288) [system] d='['
^  Redo: (287) [user] cont_sexpr(')', (0x55aefe44e2f0), _285002)
   Call: (288) [system] d='{'
^  Redo: (287) [user] cont_sexpr(')', (0x55aefe44e2f0), _285002)
   Call: (288) [system] d='"'
^  Redo: (287) [user] cont_sexpr(')', (0x55aefe44e2f0), _285002)
   Call: (288) [system] d=!
^  Redo: (287) [user] cont_sexpr(')', (0x55aefe44e2f0), _285002)
   Call: (288) [system] d='\''
^  Redo: (287) [user] cont_sexpr(')', (0x55aefe44e2f0), _285002)
   Call: (288) [system] d='`'
^  Redo: (287) [user] cont_sexpr(')', (0x55aefe44e2f0), _285002)
   Call: (288) [system] d=end_of_file
^  Redo: (287) [user] cont_sexpr(')', (0x55aefe44e2f0), _285002)
^  Call: (288) [user] read_symbolic(')', (0x55aefe44e2f0), d, _285002)
^  Unify: (288) [user] read_symbolic(')', (0x55aefe44e2f0), d, _285002)
^  Call: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _324110)
^  Unify: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _324110)
   Call: (290) [system] peek_char((0x55aefe44e2f0), _325976)
   Exit: (290) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (290) [user] is_delimiter(e)
^  Unify: (290) [user] is_delimiter(e)
   Call: (291) [system] char_type(e, space)
^  Redo: (290) [user] is_delimiter(e)
   Call: (291) [system] arg(_331616, v('(', ')', end_of_file), e)
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _324110)
   Call: (290) [system] ')'==e
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _324110)
   Call: (290) [system] get_char((0x55aefe44e2f0), e)
   Exit: (290) [system] get_char((0x55aefe44e2f0), e)
   Call: (290) [system] e=(\)
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _324110)
^  Call: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _338982)
^  Unify: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _338982)
   Call: (291) [system] peek_char((0x55aefe44e2f0), _340848)
   Exit: (291) [system] peek_char((0x55aefe44e2f0), c)
^  Call: (291) [user] is_delimiter(c)
^  Unify: (291) [user] is_delimiter(c)
   Call: (292) [system] char_type(c, space)
^  Redo: (291) [user] is_delimiter(c)
   Call: (292) [system] arg(_346488, v('(', ')', end_of_file), c)
^  Redo: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _338982)
   Call: (291) [system] ')'==c
^  Redo: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _338982)
   Call: (291) [system] get_char((0x55aefe44e2f0), c)
   Exit: (291) [system] get_char((0x55aefe44e2f0), c)
   Call: (291) [system] c=(\)
^  Redo: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _338982)
^  Call: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _353854)
^  Unify: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _353854)
   Call: (292) [system] peek_char((0x55aefe44e2f0), _355720)
   Exit: (292) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (292) [user] is_delimiter(o)
^  Unify: (292) [user] is_delimiter(o)
   Call: (293) [system] char_type(o, space)
^  Redo: (292) [user] is_delimiter(o)
   Call: (293) [system] arg(_361360, v('(', ')', end_of_file), o)
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _353854)
   Call: (292) [system] ')'==o
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _353854)
   Call: (292) [system] get_char((0x55aefe44e2f0), o)
   Exit: (292) [system] get_char((0x55aefe44e2f0), o)
   Call: (292) [system] o=(\)
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _353854)
^  Call: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _368726)
^  Unify: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _368726)
   Call: (293) [system] peek_char((0x55aefe44e2f0), _370592)
   Exit: (293) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (293) [user] is_delimiter(n)
^  Unify: (293) [user] is_delimiter(n)
   Call: (294) [system] char_type(n, space)
^  Redo: (293) [user] is_delimiter(n)
   Call: (294) [system] arg(_376232, v('(', ')', end_of_file), n)
^  Redo: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _368726)
   Call: (293) [system] ')'==n
^  Redo: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _368726)
   Call: (293) [system] get_char((0x55aefe44e2f0), n)
   Exit: (293) [system] get_char((0x55aefe44e2f0), n)
   Call: (293) [system] n=(\)
^  Redo: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _368726)
^  Call: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _383598)
^  Unify: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _383598)
   Call: (294) [system] peek_char((0x55aefe44e2f0), _385464)
   Exit: (294) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (294) [user] is_delimiter(s)
^  Unify: (294) [user] is_delimiter(s)
   Call: (295) [system] char_type(s, space)
^  Redo: (294) [user] is_delimiter(s)
   Call: (295) [system] arg(_391104, v('(', ')', end_of_file), s)
^  Redo: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _383598)
   Call: (294) [system] ')'==s
^  Redo: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _383598)
   Call: (294) [system] get_char((0x55aefe44e2f0), s)
   Exit: (294) [system] get_char((0x55aefe44e2f0), s)
   Call: (294) [system] s=(\)
^  Redo: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _383598)
^  Call: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _398470)
^  Unify: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _398470)
   Call: (295) [system] peek_char((0x55aefe44e2f0), _400336)
   Exit: (295) [system] peek_char((0x55aefe44e2f0), -)
^  Call: (295) [user] is_delimiter(-)
^  Unify: (295) [user] is_delimiter(-)
   Call: (296) [system] char_type(-, space)
^  Redo: (295) [user] is_delimiter(-)
   Call: (296) [system] arg(_405976, v('(', ')', end_of_file), -)
^  Redo: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _398470)
   Call: (295) [system] ')'==(-)
^  Redo: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _398470)
   Call: (295) [system] get_char((0x55aefe44e2f0), -)
   Exit: (295) [system] get_char((0x55aefe44e2f0), -)
   Call: (295) [system] (-)=(\)
^  Redo: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _398470)
^  Call: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _413342)
^  Unify: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _413342)
   Call: (296) [system] peek_char((0x55aefe44e2f0), _415208)
   Exit: (296) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (296) [user] is_delimiter(a)
^  Unify: (296) [user] is_delimiter(a)
   Call: (297) [system] char_type(a, space)
^  Redo: (296) [user] is_delimiter(a)
   Call: (297) [system] arg(_420848, v('(', ')', end_of_file), a)
^  Redo: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _413342)
   Call: (296) [system] ')'==a
^  Redo: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _413342)
   Call: (296) [system] get_char((0x55aefe44e2f0), a)
   Exit: (296) [system] get_char((0x55aefe44e2f0), a)
   Call: (296) [system] a=(\)
^  Redo: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _413342)
^  Call: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _428214)
^  Unify: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _428214)
   Call: (297) [system] peek_char((0x55aefe44e2f0), _430080)
   Exit: (297) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (297) [user] is_delimiter(t)
^  Unify: (297) [user] is_delimiter(t)
   Call: (298) [system] char_type(t, space)
^  Redo: (297) [user] is_delimiter(t)
   Call: (298) [system] arg(_435720, v('(', ')', end_of_file), t)
^  Redo: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _428214)
   Call: (297) [system] ')'==t
^  Redo: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _428214)
   Call: (297) [system] get_char((0x55aefe44e2f0), t)
   Exit: (297) [system] get_char((0x55aefe44e2f0), t)
   Call: (297) [system] t=(\)
^  Redo: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _428214)
^  Call: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _443086)
^  Unify: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _443086)
   Call: (298) [system] peek_char((0x55aefe44e2f0), _444952)
   Exit: (298) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (298) [user] is_delimiter(o)
^  Unify: (298) [user] is_delimiter(o)
   Call: (299) [system] char_type(o, space)
^  Redo: (298) [user] is_delimiter(o)
   Call: (299) [system] arg(_450592, v('(', ')', end_of_file), o)
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _443086)
   Call: (298) [system] ')'==o
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _443086)
   Call: (298) [system] get_char((0x55aefe44e2f0), o)
   Exit: (298) [system] get_char((0x55aefe44e2f0), o)
   Call: (298) [system] o=(\)
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _443086)
^  Call: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _457958)
^  Unify: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _457958)
   Call: (299) [system] peek_char((0x55aefe44e2f0), _459824)
   Exit: (299) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (299) [user] is_delimiter(m)
^  Unify: (299) [user] is_delimiter(m)
   Call: (300) [system] char_type(m, space)
^  Redo: (299) [user] is_delimiter(m)
   Call: (300) [system] arg(_465464, v('(', ')', end_of_file), m)
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _457958)
   Call: (299) [system] ')'==m
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _457958)
   Call: (299) [system] get_char((0x55aefe44e2f0), m)
   Exit: (299) [system] get_char((0x55aefe44e2f0), m)
   Call: (299) [system] m=(\)
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _457958)
^  Call: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _472830)
^  Unify: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _472830)
   Call: (300) [system] peek_char((0x55aefe44e2f0), _474696)
   Exit: (300) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (300) [user] is_delimiter(' ')
^  Unify: (300) [user] is_delimiter(' ')
   Call: (301) [system] char_type(' ', space)
   Exit: (301) [system] char_type(' ', space)
^  Exit: (300) [user] is_delimiter(' ')
   Call: (300) [system] _472830=[]
   Exit: (300) [system] []=[]
^  Exit: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (299) [system] _457958=[m]
   Exit: (299) [system] [m]=[m]
^  Exit: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (298) [system] _443086=[o, m]
   Exit: (298) [system] [o, m]=[o, m]
^  Exit: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (297) [system] _428214=[t, o, m]
   Exit: (297) [system] [t, o, m]=[t, o, m]
^  Exit: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
   Call: (296) [system] _413342=[a, t, o, m]
   Exit: (296) [system] [a, t, o, m]=[a, t, o, m]
^  Exit: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, t, o, m])
   Call: (295) [system] _398470=[-, a, t, o, m]
   Exit: (295) [system] [-, a, t, o, m]=[-, a, t, o, m]
^  Exit: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [-, a, t, o, m])
   Call: (294) [system] _383598=[s, -, a, t, o, m]
   Exit: (294) [system] [s, -, a, t, o, m]=[s, -, a, t, o, m]
^  Exit: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, -, a, t, o, m])
   Call: (293) [system] _368726=[n, s, -, a, t, o, m]
   Exit: (293) [system] [n, s, -, a, t, o, m]=[n, s, -, a, t, o, m]
^  Exit: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n, s, -, a, t, o, m])
   Call: (292) [system] _353854=[o, n, s, -, a, t, o, m]
   Exit: (292) [system] [o, n, s, -, a, t, o, m]=[o, n, s, -, a, t, o, m]
^  Exit: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, n, s, -, a, t, o, m])
   Call: (291) [system] _338982=[c, o, n, s, -, a, t, o, m]
   Exit: (291) [system] [c, o, n, s, -, a, t, o, m]=[c, o, n, s, -, a, t, o, m]
^  Exit: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [c, o, n, s, -, a, t, o, m])
   Call: (290) [system] _324110=[e, c, o, n, s, -, a, t, o, m]
   Exit: (290) [system] [e, c, o, n, s, -, a, t, o, m]=[e, c, o, n, s, -, a, t, o, m]
^  Exit: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, c, o, n, s, -, a, t, o, m])
^  Call: (289) [user] classify_and_convert_charseq(d, [e, c, o, n, s, -, a, t, o, m], _285002)
^  Unify: (289) [user] classify_and_convert_charseq(d, [e, c, o, n, s, -, a, t, o, m], _285002)
^  Call: (291) [system] setup_call_cleanup('$notrace'(_513802, _513804), once(user:catch(read_from_chars([d, e, c, o, n, s, -, a, t, o, m], _285002), _513778, fail)), '$restore_trace'(_513802, _513804))
^  Unify: (291) [system] setup_call_cleanup(system:'$notrace'(_513802, _513804), system:once(user:catch(read_from_chars([d, e, c, o, n, s, -, a, t, o, m], _285002), _513778, fail)), system:'$restore_trace'(_513802, _513804))
^  Call: (292) [system] sig_atomic(system:'$notrace'(_513802, _513804))
^  Exit: (291) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([d, e, c, o, n, s, -, a, t, o, m], decons-atom), _513778, fail)), system:'$restore_trace'(3, -1))
   Call: (290) [system] atomic(decons-atom)
^  Redo: (289) [user] classify_and_convert_charseq(d, [e, c, o, n, s, -, a, t, o, m], _285002)
^  Unify: (289) [user] classify_and_convert_charseq(d, [e, c, o, n, s, -, a, t, o, m], _285002)
   Call: (290) [system] atom_chars(_285002, [d, e, c, o, n, s, -, a, t, o, m])
   Exit: (290) [system] atom_chars('decons-atom', [d, e, c, o, n, s, -, a, t, o, m])
^  Exit: (289) [user] classify_and_convert_charseq(d, [e, c, o, n, s, -, a, t, o, m], 'decons-atom')
^  Exit: (288) [user] read_symbolic(')', (0x55aefe44e2f0), d, 'decons-atom')
^  Exit: (287) [user] cont_sexpr(')', (0x55aefe44e2f0), 'decons-atom')
^  Call: (287) [user] read_list(')', (0x55aefe44e2f0), _7040)
^  Unify: (287) [user] read_list(')', (0x55aefe44e2f0), _7040)
^  Call: (288) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (288) [user] skip_spaces((0x55aefe44e2f0))
   Call: (289) [system] peek_char((0x55aefe44e2f0), _10754)
   Exit: (289) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (289) [system] ' '=(;)
^  Redo: (288) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (289) [user] is_like_space(' ')
^  Unify: (289) [user] is_like_space(' ')
   Call: (290) [system] char_type(' ', 'white')
   Exit: (290) [system] char_type(' ', 'white')
^  Exit: (289) [user] is_like_space(' ')
   Call: (289) [system] get_char((0x55aefe44e2f0), _19412)
   Exit: (289) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (289) [user] skip_spaces((0x55aefe44e2f0))
   Call: (290) [system] peek_char((0x55aefe44e2f0), _23040)
   Exit: (290) [system] peek_char((0x55aefe44e2f0), $)
   Call: (290) [system] ($)=(;)
^  Redo: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (290) [user] is_like_space($)
^  Unify: (290) [user] is_like_space($)
   Call: (291) [system] char_type($, 'white')
^  Redo: (290) [user] is_like_space($)
^  Unify: (290) [user] is_like_space($)
   Call: (291) [system] char_type($, end_of_line)
^  Redo: (290) [user] is_like_space($)
^  Unify: (290) [user] is_like_space($)
   Call: (291) [system] char_type($, space)
^  Redo: (290) [user] is_like_space($)
^  Unify: (290) [user] is_like_space($)
   Call: (291) [system] char_type($, cntrl)
^  Redo: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (288) [user] skip_spaces((0x55aefe44e2f0))
   Call: (288) [system] peek_char((0x55aefe44e2f0), _40748)
   Exit: (288) [system] peek_char((0x55aefe44e2f0), $)
   Call: (288) [system] ($)=')'
^  Redo: (287) [user] read_list(')', (0x55aefe44e2f0), _7040)
   Call: (288) [system] ($)=end_of_file
^  Redo: (287) [user] read_list(')', (0x55aefe44e2f0), _7040)
^  Call: (288) [user] cont_sexpr(')', (0x55aefe44e2f0), _46326)
^  Unify: (288) [user] cont_sexpr(')', (0x55aefe44e2f0), _46326)
^  Call: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (289) [user] skip_spaces((0x55aefe44e2f0))
   Call: (290) [system] peek_char((0x55aefe44e2f0), _50040)
   Exit: (290) [system] peek_char((0x55aefe44e2f0), $)
   Call: (290) [system] ($)=(;)
^  Redo: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (290) [user] is_like_space($)
^  Unify: (290) [user] is_like_space($)
   Call: (291) [system] char_type($, 'white')
^  Redo: (290) [user] is_like_space($)
^  Unify: (290) [user] is_like_space($)
   Call: (291) [system] char_type($, end_of_line)
^  Redo: (290) [user] is_like_space($)
^  Unify: (290) [user] is_like_space($)
   Call: (291) [system] char_type($, space)
^  Redo: (290) [user] is_like_space($)
^  Unify: (290) [user] is_like_space($)
   Call: (291) [system] char_type($, cntrl)
^  Redo: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (289) [user] skip_spaces((0x55aefe44e2f0))
   Call: (289) [system] get_char((0x55aefe44e2f0), _66824)
   Exit: (289) [system] get_char((0x55aefe44e2f0), $)
   Call: (289) [system] ($)='('
^  Redo: (288) [user] cont_sexpr(')', (0x55aefe44e2f0), _46326)
   Call: (289) [system] ($)='['
^  Redo: (288) [user] cont_sexpr(')', (0x55aefe44e2f0), _46326)
   Call: (289) [system] ($)='{'
^  Redo: (288) [user] cont_sexpr(')', (0x55aefe44e2f0), _46326)
   Call: (289) [system] ($)='"'
^  Redo: (288) [user] cont_sexpr(')', (0x55aefe44e2f0), _46326)
   Call: (289) [system] ($)=!
^  Redo: (288) [user] cont_sexpr(')', (0x55aefe44e2f0), _46326)
   Call: (289) [system] ($)='\''
^  Redo: (288) [user] cont_sexpr(')', (0x55aefe44e2f0), _46326)
   Call: (289) [system] ($)='`'
^  Redo: (288) [user] cont_sexpr(')', (0x55aefe44e2f0), _46326)
   Call: (289) [system] ($)=end_of_file
^  Redo: (288) [user] cont_sexpr(')', (0x55aefe44e2f0), _46326)
^  Call: (289) [user] read_symbolic(')', (0x55aefe44e2f0), $, _46326)
^  Unify: (289) [user] read_symbolic(')', (0x55aefe44e2f0), $, _46326)
^  Call: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _85434)
^  Unify: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _85434)
   Call: (291) [system] peek_char((0x55aefe44e2f0), _87300)
   Exit: (291) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (291) [user] is_delimiter(a)
^  Unify: (291) [user] is_delimiter(a)
   Call: (292) [system] char_type(a, space)
^  Redo: (291) [user] is_delimiter(a)
   Call: (292) [system] arg(_92940, v('(', ')', end_of_file), a)
^  Redo: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _85434)
   Call: (291) [system] ')'==a
^  Redo: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _85434)
   Call: (291) [system] get_char((0x55aefe44e2f0), a)
   Exit: (291) [system] get_char((0x55aefe44e2f0), a)
   Call: (291) [system] a=(\)
^  Redo: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _85434)
^  Call: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _100306)
^  Unify: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _100306)
   Call: (292) [system] peek_char((0x55aefe44e2f0), _102172)
   Exit: (292) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (292) [user] is_delimiter(t)
^  Unify: (292) [user] is_delimiter(t)
   Call: (293) [system] char_type(t, space)
^  Redo: (292) [user] is_delimiter(t)
   Call: (293) [system] arg(_107812, v('(', ')', end_of_file), t)
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _100306)
   Call: (292) [system] ')'==t
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _100306)
   Call: (292) [system] get_char((0x55aefe44e2f0), t)
   Exit: (292) [system] get_char((0x55aefe44e2f0), t)
   Call: (292) [system] t=(\)
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _100306)
^  Call: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _115178)
^  Unify: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _115178)
   Call: (293) [system] peek_char((0x55aefe44e2f0), _117044)
   Exit: (293) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (293) [user] is_delimiter(o)
^  Unify: (293) [user] is_delimiter(o)
   Call: (294) [system] char_type(o, space)
^  Redo: (293) [user] is_delimiter(o)
   Call: (294) [system] arg(_122684, v('(', ')', end_of_file), o)
^  Redo: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _115178)
   Call: (293) [system] ')'==o
^  Redo: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _115178)
   Call: (293) [system] get_char((0x55aefe44e2f0), o)
   Exit: (293) [system] get_char((0x55aefe44e2f0), o)
   Call: (293) [system] o=(\)
^  Redo: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _115178)
^  Call: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _130050)
^  Unify: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _130050)
   Call: (294) [system] peek_char((0x55aefe44e2f0), _131916)
   Exit: (294) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (294) [user] is_delimiter(m)
^  Unify: (294) [user] is_delimiter(m)
   Call: (295) [system] char_type(m, space)
^  Redo: (294) [user] is_delimiter(m)
   Call: (295) [system] arg(_137556, v('(', ')', end_of_file), m)
^  Redo: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _130050)
   Call: (294) [system] ')'==m
^  Redo: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _130050)
   Call: (294) [system] get_char((0x55aefe44e2f0), m)
   Exit: (294) [system] get_char((0x55aefe44e2f0), m)
   Call: (294) [system] m=(\)
^  Redo: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _130050)
^  Call: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _144922)
^  Unify: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _144922)
   Call: (295) [system] peek_char((0x55aefe44e2f0), _146788)
   Exit: (295) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (295) [user] is_delimiter(')')
^  Unify: (295) [user] is_delimiter(')')
   Call: (296) [system] char_type(')', space)
^  Redo: (295) [user] is_delimiter(')')
   Call: (296) [system] arg(_152428, v('(', ')', end_of_file), ')')
   Exit: (296) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (295) [user] is_delimiter(')')
   Call: (295) [system] _144922=[]
   Exit: (295) [system] []=[]
^  Exit: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (294) [system] _130050=[m]
   Exit: (294) [system] [m]=[m]
^  Exit: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (293) [system] _115178=[o, m]
   Exit: (293) [system] [o, m]=[o, m]
^  Exit: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (292) [system] _100306=[t, o, m]
   Exit: (292) [system] [t, o, m]=[t, o, m]
^  Exit: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
   Call: (291) [system] _85434=[a, t, o, m]
   Exit: (291) [system] [a, t, o, m]=[a, t, o, m]
^  Exit: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, t, o, m])
^  Call: (290) [user] classify_and_convert_charseq($, [a, t, o, m], _46326)
^  Unify: (290) [user] classify_and_convert_charseq($, [a, t, o, m], '$VAR'(_170040))
   Call: (291) [system] atom_chars(_170040, ['_', a, t, o, m])
   Exit: (291) [system] atom_chars('_atom', ['_', a, t, o, m])
^  Exit: (290) [user] classify_and_convert_charseq($, [a, t, o, m], _atom)
^  Exit: (289) [user] read_symbolic(')', (0x55aefe44e2f0), $, _atom)
^  Exit: (288) [user] cont_sexpr(')', (0x55aefe44e2f0), _atom)
^  Call: (288) [user] read_list(')', (0x55aefe44e2f0), _175636)
^  Unify: (288) [user] read_list(')', (0x55aefe44e2f0), _175636)
^  Call: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (289) [user] skip_spaces((0x55aefe44e2f0))
   Call: (290) [system] peek_char((0x55aefe44e2f0), _179350)
   Exit: (290) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (290) [system] ')'=(;)
^  Redo: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (290) [user] is_like_space(')')
^  Unify: (290) [user] is_like_space(')')
   Call: (291) [system] char_type(')', 'white')
^  Redo: (290) [user] is_like_space(')')
^  Unify: (290) [user] is_like_space(')')
   Call: (291) [system] char_type(')', end_of_line)
^  Redo: (290) [user] is_like_space(')')
^  Unify: (290) [user] is_like_space(')')
   Call: (291) [system] char_type(')', space)
^  Redo: (290) [user] is_like_space(')')
^  Unify: (290) [user] is_like_space(')')
   Call: (291) [system] char_type(')', cntrl)
^  Redo: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (289) [user] skip_spaces((0x55aefe44e2f0))
   Call: (289) [system] peek_char((0x55aefe44e2f0), _196134)
   Exit: (289) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (289) [system] ')'=')'
   Exit: (289) [system] ')'=')'
   Call: (289) [system] get_char((0x55aefe44e2f0), _199924)
   Exit: (289) [system] get_char((0x55aefe44e2f0), ')')
   Call: (289) [system] _175636=[]
   Exit: (289) [system] []=[]
^  Exit: (288) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (288) [system] _7040=[_atom]
   Exit: (288) [system] [_atom]=[_atom]
^  Exit: (287) [user] read_list(')', (0x55aefe44e2f0), [_atom])
   Call: (287) [system] _6134=['decons-atom', _atom]
   Exit: (287) [system] ['decons-atom', _atom]=['decons-atom', _atom]
^  Exit: (286) [user] read_list(')', (0x55aefe44e2f0), ['decons-atom', _atom])
^  Exit: (285) [user] cont_sexpr(')', (0x55aefe44e2f0), ['decons-atom', _atom])
^  Call: (285) [user] read_list(')', (0x55aefe44e2f0), _211012)
^  Unify: (285) [user] read_list(')', (0x55aefe44e2f0), _211012)
^  Call: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (286) [user] skip_spaces((0x55aefe44e2f0))
   Call: (287) [system] peek_char((0x55aefe44e2f0), _214726)
   Exit: (287) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (287) [system] ' '=(;)
^  Redo: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (287) [user] is_like_space(' ')
^  Unify: (287) [user] is_like_space(' ')
   Call: (288) [system] char_type(' ', 'white')
   Exit: (288) [system] char_type(' ', 'white')
^  Exit: (287) [user] is_like_space(' ')
   Call: (287) [system] get_char((0x55aefe44e2f0), _223384)
   Exit: (287) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (287) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (287) [user] skip_spaces((0x55aefe44e2f0))
   Call: (288) [system] peek_char((0x55aefe44e2f0), _227012)
   Exit: (288) [system] peek_char((0x55aefe44e2f0), $)
   Call: (288) [system] ($)=(;)
^  Redo: (287) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (288) [user] is_like_space($)
^  Unify: (288) [user] is_like_space($)
   Call: (289) [system] char_type($, 'white')
^  Redo: (288) [user] is_like_space($)
^  Unify: (288) [user] is_like_space($)
   Call: (289) [system] char_type($, end_of_line)
^  Redo: (288) [user] is_like_space($)
^  Unify: (288) [user] is_like_space($)
   Call: (289) [system] char_type($, space)
^  Redo: (288) [user] is_like_space($)
^  Unify: (288) [user] is_like_space($)
   Call: (289) [system] char_type($, cntrl)
^  Redo: (287) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (287) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (286) [user] skip_spaces((0x55aefe44e2f0))
   Call: (286) [system] peek_char((0x55aefe44e2f0), _244720)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), $)
   Call: (286) [system] ($)=')'
^  Redo: (285) [user] read_list(')', (0x55aefe44e2f0), _211012)
   Call: (286) [system] ($)=end_of_file
^  Redo: (285) [user] read_list(')', (0x55aefe44e2f0), _211012)
^  Call: (286) [user] cont_sexpr(')', (0x55aefe44e2f0), _250298)
^  Unify: (286) [user] cont_sexpr(')', (0x55aefe44e2f0), _250298)
^  Call: (287) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (287) [user] skip_spaces((0x55aefe44e2f0))
   Call: (288) [system] peek_char((0x55aefe44e2f0), _254012)
   Exit: (288) [system] peek_char((0x55aefe44e2f0), $)
   Call: (288) [system] ($)=(;)
^  Redo: (287) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (288) [user] is_like_space($)
^  Unify: (288) [user] is_like_space($)
   Call: (289) [system] char_type($, 'white')
^  Redo: (288) [user] is_like_space($)
^  Unify: (288) [user] is_like_space($)
   Call: (289) [system] char_type($, end_of_line)
^  Redo: (288) [user] is_like_space($)
^  Unify: (288) [user] is_like_space($)
   Call: (289) [system] char_type($, space)
^  Redo: (288) [user] is_like_space($)
^  Unify: (288) [user] is_like_space($)
   Call: (289) [system] char_type($, cntrl)
^  Redo: (287) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (287) [user] skip_spaces((0x55aefe44e2f0))
   Call: (287) [system] get_char((0x55aefe44e2f0), _270796)
   Exit: (287) [system] get_char((0x55aefe44e2f0), $)
   Call: (287) [system] ($)='('
^  Redo: (286) [user] cont_sexpr(')', (0x55aefe44e2f0), _250298)
   Call: (287) [system] ($)='['
^  Redo: (286) [user] cont_sexpr(')', (0x55aefe44e2f0), _250298)
   Call: (287) [system] ($)='{'
^  Redo: (286) [user] cont_sexpr(')', (0x55aefe44e2f0), _250298)
   Call: (287) [system] ($)='"'
^  Redo: (286) [user] cont_sexpr(')', (0x55aefe44e2f0), _250298)
   Call: (287) [system] ($)=!
^  Redo: (286) [user] cont_sexpr(')', (0x55aefe44e2f0), _250298)
   Call: (287) [system] ($)='\''
^  Redo: (286) [user] cont_sexpr(')', (0x55aefe44e2f0), _250298)
   Call: (287) [system] ($)='`'
^  Redo: (286) [user] cont_sexpr(')', (0x55aefe44e2f0), _250298)
   Call: (287) [system] ($)=end_of_file
^  Redo: (286) [user] cont_sexpr(')', (0x55aefe44e2f0), _250298)
^  Call: (287) [user] read_symbolic(')', (0x55aefe44e2f0), $, _250298)
^  Unify: (287) [user] read_symbolic(')', (0x55aefe44e2f0), $, _250298)
^  Call: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _289406)
^  Unify: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _289406)
   Call: (289) [system] peek_char((0x55aefe44e2f0), _291272)
   Exit: (289) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (289) [user] is_delimiter(l)
^  Unify: (289) [user] is_delimiter(l)
   Call: (290) [system] char_type(l, space)
^  Redo: (289) [user] is_delimiter(l)
   Call: (290) [system] arg(_296912, v('(', ')', end_of_file), l)
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _289406)
   Call: (289) [system] ')'==l
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _289406)
   Call: (289) [system] get_char((0x55aefe44e2f0), l)
   Exit: (289) [system] get_char((0x55aefe44e2f0), l)
   Call: (289) [system] l=(\)
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _289406)
^  Call: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _304278)
^  Unify: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _304278)
   Call: (290) [system] peek_char((0x55aefe44e2f0), _306144)
   Exit: (290) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (290) [user] is_delimiter(i)
^  Unify: (290) [user] is_delimiter(i)
   Call: (291) [system] char_type(i, space)
^  Redo: (290) [user] is_delimiter(i)
   Call: (291) [system] arg(_311784, v('(', ')', end_of_file), i)
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _304278)
   Call: (290) [system] ')'==i
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _304278)
   Call: (290) [system] get_char((0x55aefe44e2f0), i)
   Exit: (290) [system] get_char((0x55aefe44e2f0), i)
   Call: (290) [system] i=(\)
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _304278)
^  Call: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _319150)
^  Unify: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _319150)
   Call: (291) [system] peek_char((0x55aefe44e2f0), _321016)
   Exit: (291) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (291) [user] is_delimiter(s)
^  Unify: (291) [user] is_delimiter(s)
   Call: (292) [system] char_type(s, space)
^  Redo: (291) [user] is_delimiter(s)
   Call: (292) [system] arg(_326656, v('(', ')', end_of_file), s)
^  Redo: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _319150)
   Call: (291) [system] ')'==s
^  Redo: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _319150)
   Call: (291) [system] get_char((0x55aefe44e2f0), s)
   Exit: (291) [system] get_char((0x55aefe44e2f0), s)
   Call: (291) [system] s=(\)
^  Redo: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _319150)
^  Call: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _334022)
^  Unify: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _334022)
   Call: (292) [system] peek_char((0x55aefe44e2f0), _335888)
   Exit: (292) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (292) [user] is_delimiter(t)
^  Unify: (292) [user] is_delimiter(t)
   Call: (293) [system] char_type(t, space)
^  Redo: (292) [user] is_delimiter(t)
   Call: (293) [system] arg(_341528, v('(', ')', end_of_file), t)
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _334022)
   Call: (292) [system] ')'==t
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _334022)
   Call: (292) [system] get_char((0x55aefe44e2f0), t)
   Exit: (292) [system] get_char((0x55aefe44e2f0), t)
   Call: (292) [system] t=(\)
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _334022)
^  Call: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _348894)
^  Unify: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _348894)
   Call: (293) [system] peek_char((0x55aefe44e2f0), _350760)
   Exit: (293) [system] peek_char((0x55aefe44e2f0), '\n')
^  Call: (293) [user] is_delimiter('\n')
^  Unify: (293) [user] is_delimiter('\n')
   Call: (294) [system] char_type('\n', space)
   Exit: (294) [system] char_type('\n', space)
^  Exit: (293) [user] is_delimiter('\n')
   Call: (293) [system] _348894=[]
   Exit: (293) [system] []=[]
^  Exit: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (292) [system] _334022=[t]
   Exit: (292) [system] [t]=[t]
^  Exit: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t])
   Call: (291) [system] _319150=[s, t]
   Exit: (291) [system] [s, t]=[s, t]
^  Exit: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, t])
   Call: (290) [system] _304278=[i, s, t]
   Exit: (290) [system] [i, s, t]=[i, s, t]
^  Exit: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, s, t])
   Call: (289) [system] _289406=[l, i, s, t]
   Exit: (289) [system] [l, i, s, t]=[l, i, s, t]
^  Exit: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l, i, s, t])
^  Call: (288) [user] classify_and_convert_charseq($, [l, i, s, t], _250298)
^  Unify: (288) [user] classify_and_convert_charseq($, [l, i, s, t], '$VAR'(_372144))
   Call: (289) [system] atom_chars(_372144, ['_', l, i, s, t])
   Exit: (289) [system] atom_chars('_list', ['_', l, i, s, t])
^  Exit: (288) [user] classify_and_convert_charseq($, [l, i, s, t], _list)
^  Exit: (287) [user] read_symbolic(')', (0x55aefe44e2f0), $, _list)
^  Exit: (286) [user] cont_sexpr(')', (0x55aefe44e2f0), _list)
^  Call: (286) [user] read_list(')', (0x55aefe44e2f0), _377740)
^  Unify: (286) [user] read_list(')', (0x55aefe44e2f0), _377740)
^  Call: (287) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (287) [user] skip_spaces((0x55aefe44e2f0))
   Call: (288) [system] peek_char((0x55aefe44e2f0), _381454)
   Exit: (288) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (288) [system] '\n'=(;)
^  Redo: (287) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (288) [user] is_like_space('\n')
^  Unify: (288) [user] is_like_space('\n')
   Call: (289) [system] char_type('\n', 'white')
^  Redo: (288) [user] is_like_space('\n')
^  Unify: (288) [user] is_like_space('\n')
   Call: (289) [system] char_type('\n', end_of_line)
   Exit: (289) [system] char_type('\n', end_of_line)
^  Exit: (288) [user] is_like_space('\n')
   Call: (288) [system] get_char((0x55aefe44e2f0), _392766)
   Exit: (288) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (288) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (288) [user] skip_spaces((0x55aefe44e2f0))
   Call: (289) [system] peek_char((0x55aefe44e2f0), _396394)
   Exit: (289) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (289) [system] ' '=(;)
^  Redo: (288) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (289) [user] is_like_space(' ')
^  Unify: (289) [user] is_like_space(' ')
   Call: (290) [system] char_type(' ', 'white')
   Exit: (290) [system] char_type(' ', 'white')
^  Exit: (289) [user] is_like_space(' ')
   Call: (289) [system] get_char((0x55aefe44e2f0), _405052)
   Exit: (289) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (289) [user] skip_spaces((0x55aefe44e2f0))
   Call: (290) [system] peek_char((0x55aefe44e2f0), _408680)
   Exit: (290) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (290) [system] ' '=(;)
^  Redo: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (290) [user] is_like_space(' ')
^  Unify: (290) [user] is_like_space(' ')
   Call: (291) [system] char_type(' ', 'white')
   Exit: (291) [system] char_type(' ', 'white')
^  Exit: (290) [user] is_like_space(' ')
   Call: (290) [system] get_char((0x55aefe44e2f0), _417338)
   Exit: (290) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (290) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (290) [user] skip_spaces((0x55aefe44e2f0))
   Call: (291) [system] peek_char((0x55aefe44e2f0), _420966)
   Exit: (291) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (291) [system] ' '=(;)
^  Redo: (290) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (291) [user] is_like_space(' ')
^  Unify: (291) [user] is_like_space(' ')
   Call: (292) [system] char_type(' ', 'white')
   Exit: (292) [system] char_type(' ', 'white')
^  Exit: (291) [user] is_like_space(' ')
   Call: (291) [system] get_char((0x55aefe44e2f0), _429624)
   Exit: (291) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (291) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (291) [user] skip_spaces((0x55aefe44e2f0))
   Call: (292) [system] peek_char((0x55aefe44e2f0), _433252)
   Exit: (292) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (292) [system] ' '=(;)
^  Redo: (291) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (292) [user] is_like_space(' ')
^  Unify: (292) [user] is_like_space(' ')
   Call: (293) [system] char_type(' ', 'white')
   Exit: (293) [system] char_type(' ', 'white')
^  Exit: (292) [user] is_like_space(' ')
   Call: (292) [system] get_char((0x55aefe44e2f0), _441910)
   Exit: (292) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (292) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (292) [user] skip_spaces((0x55aefe44e2f0))
   Call: (293) [system] peek_char((0x55aefe44e2f0), _445538)
   Exit: (293) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (293) [system] ' '=(;)
^  Redo: (292) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (293) [user] is_like_space(' ')
^  Unify: (293) [user] is_like_space(' ')
   Call: (294) [system] char_type(' ', 'white')
   Exit: (294) [system] char_type(' ', 'white')
^  Exit: (293) [user] is_like_space(' ')
   Call: (293) [system] get_char((0x55aefe44e2f0), _454196)
   Exit: (293) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (293) [user] skip_spaces((0x55aefe44e2f0))
   Call: (294) [system] peek_char((0x55aefe44e2f0), _457824)
   Exit: (294) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (294) [system] ' '=(;)
^  Redo: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (294) [user] is_like_space(' ')
^  Unify: (294) [user] is_like_space(' ')
   Call: (295) [system] char_type(' ', 'white')
   Exit: (295) [system] char_type(' ', 'white')
^  Exit: (294) [user] is_like_space(' ')
   Call: (294) [system] get_char((0x55aefe44e2f0), _466482)
   Exit: (294) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (294) [user] skip_spaces((0x55aefe44e2f0))
   Call: (295) [system] peek_char((0x55aefe44e2f0), _470110)
   Exit: (295) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (295) [system] '('=(;)
^  Redo: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (295) [user] is_like_space('(')
^  Unify: (295) [user] is_like_space('(')
   Call: (296) [system] char_type('(', 'white')
^  Redo: (295) [user] is_like_space('(')
^  Unify: (295) [user] is_like_space('(')
   Call: (296) [system] char_type('(', end_of_line)
^  Redo: (295) [user] is_like_space('(')
^  Unify: (295) [user] is_like_space('(')
   Call: (296) [system] char_type('(', space)
^  Redo: (295) [user] is_like_space('(')
^  Unify: (295) [user] is_like_space('(')
   Call: (296) [system] char_type('(', cntrl)
^  Redo: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (292) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (291) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (290) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (288) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (287) [user] skip_spaces((0x55aefe44e2f0))
   Call: (287) [system] peek_char((0x55aefe44e2f0), _493362)
   Exit: (287) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (287) [system] '('=')'
^  Redo: (286) [user] read_list(')', (0x55aefe44e2f0), _377740)
   Call: (287) [system] '('=end_of_file
^  Redo: (286) [user] read_list(')', (0x55aefe44e2f0), _377740)
^  Call: (287) [user] cont_sexpr(')', (0x55aefe44e2f0), _498940)
^  Unify: (287) [user] cont_sexpr(')', (0x55aefe44e2f0), _498940)
^  Call: (288) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (288) [user] skip_spaces((0x55aefe44e2f0))
   Call: (289) [system] peek_char((0x55aefe44e2f0), _502654)
   Exit: (289) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (289) [system] '('=(;)
^  Redo: (288) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (289) [user] is_like_space('(')
^  Unify: (289) [user] is_like_space('(')
   Call: (290) [system] char_type('(', 'white')
^  Redo: (289) [user] is_like_space('(')
^  Unify: (289) [user] is_like_space('(')
   Call: (290) [system] char_type('(', end_of_line)
^  Redo: (289) [user] is_like_space('(')
^  Unify: (289) [user] is_like_space('(')
   Call: (290) [system] char_type('(', space)
^  Redo: (289) [user] is_like_space('(')
^  Unify: (289) [user] is_like_space('(')
   Call: (290) [system] char_type('(', cntrl)
^  Redo: (288) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (288) [user] skip_spaces((0x55aefe44e2f0))
   Call: (288) [system] get_char((0x55aefe44e2f0), _519438)
   Exit: (288) [system] get_char((0x55aefe44e2f0), '(')
   Call: (288) [system] '('='('
   Exit: (288) [system] '('='('
^  Call: (288) [user] read_list(')', (0x55aefe44e2f0), _498940)
^  Unify: (288) [user] read_list(')', (0x55aefe44e2f0), _6166)
^  Call: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (289) [user] skip_spaces((0x55aefe44e2f0))
   Call: (290) [system] peek_char((0x55aefe44e2f0), _8906)
   Exit: (290) [system] peek_char((0x55aefe44e2f0), u)
   Call: (290) [system] u=(;)
^  Redo: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (290) [user] is_like_space(u)
^  Unify: (290) [user] is_like_space(u)
   Call: (291) [system] char_type(u, 'white')
^  Redo: (290) [user] is_like_space(u)
^  Unify: (290) [user] is_like_space(u)
   Call: (291) [system] char_type(u, end_of_line)
^  Redo: (290) [user] is_like_space(u)
^  Unify: (290) [user] is_like_space(u)
   Call: (291) [system] char_type(u, space)
^  Redo: (290) [user] is_like_space(u)
^  Unify: (290) [user] is_like_space(u)
   Call: (291) [system] char_type(u, cntrl)
^  Redo: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (289) [user] skip_spaces((0x55aefe44e2f0))
   Call: (289) [system] peek_char((0x55aefe44e2f0), _25690)
   Exit: (289) [system] peek_char((0x55aefe44e2f0), u)
   Call: (289) [system] u=')'
^  Redo: (288) [user] read_list(')', (0x55aefe44e2f0), _6166)
   Call: (289) [system] u=end_of_file
^  Redo: (288) [user] read_list(')', (0x55aefe44e2f0), _6166)
^  Call: (289) [user] cont_sexpr(')', (0x55aefe44e2f0), _31268)
^  Unify: (289) [user] cont_sexpr(')', (0x55aefe44e2f0), _31268)
^  Call: (290) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (290) [user] skip_spaces((0x55aefe44e2f0))
   Call: (291) [system] peek_char((0x55aefe44e2f0), _34982)
   Exit: (291) [system] peek_char((0x55aefe44e2f0), u)
   Call: (291) [system] u=(;)
^  Redo: (290) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (291) [user] is_like_space(u)
^  Unify: (291) [user] is_like_space(u)
   Call: (292) [system] char_type(u, 'white')
^  Redo: (291) [user] is_like_space(u)
^  Unify: (291) [user] is_like_space(u)
   Call: (292) [system] char_type(u, end_of_line)
^  Redo: (291) [user] is_like_space(u)
^  Unify: (291) [user] is_like_space(u)
   Call: (292) [system] char_type(u, space)
^  Redo: (291) [user] is_like_space(u)
^  Unify: (291) [user] is_like_space(u)
   Call: (292) [system] char_type(u, cntrl)
^  Redo: (290) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (290) [user] skip_spaces((0x55aefe44e2f0))
   Call: (290) [system] get_char((0x55aefe44e2f0), _51766)
   Exit: (290) [system] get_char((0x55aefe44e2f0), u)
   Call: (290) [system] u='('
^  Redo: (289) [user] cont_sexpr(')', (0x55aefe44e2f0), _31268)
   Call: (290) [system] u='['
^  Redo: (289) [user] cont_sexpr(')', (0x55aefe44e2f0), _31268)
   Call: (290) [system] u='{'
^  Redo: (289) [user] cont_sexpr(')', (0x55aefe44e2f0), _31268)
   Call: (290) [system] u='"'
^  Redo: (289) [user] cont_sexpr(')', (0x55aefe44e2f0), _31268)
   Call: (290) [system] u=!
^  Redo: (289) [user] cont_sexpr(')', (0x55aefe44e2f0), _31268)
   Call: (290) [system] u='\''
^  Redo: (289) [user] cont_sexpr(')', (0x55aefe44e2f0), _31268)
   Call: (290) [system] u='`'
^  Redo: (289) [user] cont_sexpr(')', (0x55aefe44e2f0), _31268)
   Call: (290) [system] u=end_of_file
^  Redo: (289) [user] cont_sexpr(')', (0x55aefe44e2f0), _31268)
^  Call: (290) [user] read_symbolic(')', (0x55aefe44e2f0), u, _31268)
^  Unify: (290) [user] read_symbolic(')', (0x55aefe44e2f0), u, _31268)
^  Call: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _70376)
^  Unify: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _70376)
   Call: (292) [system] peek_char((0x55aefe44e2f0), _72242)
   Exit: (292) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (292) [user] is_delimiter(n)
^  Unify: (292) [user] is_delimiter(n)
   Call: (293) [system] char_type(n, space)
^  Redo: (292) [user] is_delimiter(n)
   Call: (293) [system] arg(_77882, v('(', ')', end_of_file), n)
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _70376)
   Call: (292) [system] ')'==n
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _70376)
   Call: (292) [system] get_char((0x55aefe44e2f0), n)
   Exit: (292) [system] get_char((0x55aefe44e2f0), n)
   Call: (292) [system] n=(\)
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _70376)
^  Call: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _85248)
^  Unify: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _85248)
   Call: (293) [system] peek_char((0x55aefe44e2f0), _87114)
   Exit: (293) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (293) [user] is_delimiter(i)
^  Unify: (293) [user] is_delimiter(i)
   Call: (294) [system] char_type(i, space)
^  Redo: (293) [user] is_delimiter(i)
   Call: (294) [system] arg(_92754, v('(', ')', end_of_file), i)
^  Redo: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _85248)
   Call: (293) [system] ')'==i
^  Redo: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _85248)
   Call: (293) [system] get_char((0x55aefe44e2f0), i)
   Exit: (293) [system] get_char((0x55aefe44e2f0), i)
   Call: (293) [system] i=(\)
^  Redo: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _85248)
^  Call: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _100120)
^  Unify: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _100120)
   Call: (294) [system] peek_char((0x55aefe44e2f0), _101986)
   Exit: (294) [system] peek_char((0x55aefe44e2f0), f)
^  Call: (294) [user] is_delimiter(f)
^  Unify: (294) [user] is_delimiter(f)
   Call: (295) [system] char_type(f, space)
^  Redo: (294) [user] is_delimiter(f)
   Call: (295) [system] arg(_107626, v('(', ')', end_of_file), f)
^  Redo: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _100120)
   Call: (294) [system] ')'==f
^  Redo: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _100120)
   Call: (294) [system] get_char((0x55aefe44e2f0), f)
   Exit: (294) [system] get_char((0x55aefe44e2f0), f)
   Call: (294) [system] f=(\)
^  Redo: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _100120)
^  Call: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _114992)
^  Unify: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _114992)
   Call: (295) [system] peek_char((0x55aefe44e2f0), _116858)
   Exit: (295) [system] peek_char((0x55aefe44e2f0), y)
^  Call: (295) [user] is_delimiter(y)
^  Unify: (295) [user] is_delimiter(y)
   Call: (296) [system] char_type(y, space)
^  Redo: (295) [user] is_delimiter(y)
   Call: (296) [system] arg(_122498, v('(', ')', end_of_file), y)
^  Redo: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _114992)
   Call: (295) [system] ')'==y
^  Redo: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _114992)
   Call: (295) [system] get_char((0x55aefe44e2f0), y)
   Exit: (295) [system] get_char((0x55aefe44e2f0), y)
   Call: (295) [system] y=(\)
^  Redo: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _114992)
^  Call: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _129864)
^  Unify: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _129864)
   Call: (296) [system] peek_char((0x55aefe44e2f0), _131730)
   Exit: (296) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (296) [user] is_delimiter(' ')
^  Unify: (296) [user] is_delimiter(' ')
   Call: (297) [system] char_type(' ', space)
   Exit: (297) [system] char_type(' ', space)
^  Exit: (296) [user] is_delimiter(' ')
   Call: (296) [system] _129864=[]
   Exit: (296) [system] []=[]
^  Exit: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (295) [system] _114992=[y]
   Exit: (295) [system] [y]=[y]
^  Exit: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [y])
   Call: (294) [system] _100120=[f, y]
   Exit: (294) [system] [f, y]=[f, y]
^  Exit: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [f, y])
   Call: (293) [system] _85248=[i, f, y]
   Exit: (293) [system] [i, f, y]=[i, f, y]
^  Exit: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, f, y])
   Call: (292) [system] _70376=[n, i, f, y]
   Exit: (292) [system] [n, i, f, y]=[n, i, f, y]
^  Exit: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n, i, f, y])
^  Call: (291) [user] classify_and_convert_charseq(u, [n, i, f, y], _31268)
^  Unify: (291) [user] classify_and_convert_charseq(u, [n, i, f, y], _31268)
^  Call: (293) [system] setup_call_cleanup('$notrace'(_154072, _154074), once(user:catch(read_from_chars([u, n, i, f, y], _31268), _154048, fail)), '$restore_trace'(_154072, _154074))
^  Unify: (293) [system] setup_call_cleanup(system:'$notrace'(_154072, _154074), system:once(user:catch(read_from_chars([u, n, i, f, y], _31268), _154048, fail)), system:'$restore_trace'(_154072, _154074))
^  Call: (294) [system] sig_atomic(system:'$notrace'(_154072, _154074))
^  Exit: (293) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([u, n, i, f, y], unify), _154048, fail)), system:'$restore_trace'(3, -1))
   Call: (292) [system] atomic(unify)
   Exit: (292) [system] atomic(unify)
^  Exit: (291) [user] classify_and_convert_charseq(u, [n, i, f, y], unify)
^  Exit: (290) [user] read_symbolic(')', (0x55aefe44e2f0), u, unify)
^  Exit: (289) [user] cont_sexpr(')', (0x55aefe44e2f0), unify)
^  Call: (289) [user] read_list(')', (0x55aefe44e2f0), _162510)
^  Unify: (289) [user] read_list(')', (0x55aefe44e2f0), _162510)
^  Call: (290) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (290) [user] skip_spaces((0x55aefe44e2f0))
   Call: (291) [system] peek_char((0x55aefe44e2f0), _166224)
   Exit: (291) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (291) [system] ' '=(;)
^  Redo: (290) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (291) [user] is_like_space(' ')
^  Unify: (291) [user] is_like_space(' ')
   Call: (292) [system] char_type(' ', 'white')
   Exit: (292) [system] char_type(' ', 'white')
^  Exit: (291) [user] is_like_space(' ')
   Call: (291) [system] get_char((0x55aefe44e2f0), _174882)
   Exit: (291) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (291) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (291) [user] skip_spaces((0x55aefe44e2f0))
   Call: (292) [system] peek_char((0x55aefe44e2f0), _178510)
   Exit: (292) [system] peek_char((0x55aefe44e2f0), $)
   Call: (292) [system] ($)=(;)
^  Redo: (291) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (292) [user] is_like_space($)
^  Unify: (292) [user] is_like_space($)
   Call: (293) [system] char_type($, 'white')
^  Redo: (292) [user] is_like_space($)
^  Unify: (292) [user] is_like_space($)
   Call: (293) [system] char_type($, end_of_line)
^  Redo: (292) [user] is_like_space($)
^  Unify: (292) [user] is_like_space($)
   Call: (293) [system] char_type($, space)
^  Redo: (292) [user] is_like_space($)
^  Unify: (292) [user] is_like_space($)
   Call: (293) [system] char_type($, cntrl)
^  Redo: (291) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (291) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (290) [user] skip_spaces((0x55aefe44e2f0))
   Call: (290) [system] peek_char((0x55aefe44e2f0), _196218)
   Exit: (290) [system] peek_char((0x55aefe44e2f0), $)
   Call: (290) [system] ($)=')'
^  Redo: (289) [user] read_list(')', (0x55aefe44e2f0), _162510)
   Call: (290) [system] ($)=end_of_file
^  Redo: (289) [user] read_list(')', (0x55aefe44e2f0), _162510)
^  Call: (290) [user] cont_sexpr(')', (0x55aefe44e2f0), _201796)
^  Unify: (290) [user] cont_sexpr(')', (0x55aefe44e2f0), _201796)
^  Call: (291) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (291) [user] skip_spaces((0x55aefe44e2f0))
   Call: (292) [system] peek_char((0x55aefe44e2f0), _205510)
   Exit: (292) [system] peek_char((0x55aefe44e2f0), $)
   Call: (292) [system] ($)=(;)
^  Redo: (291) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (292) [user] is_like_space($)
^  Unify: (292) [user] is_like_space($)
   Call: (293) [system] char_type($, 'white')
^  Redo: (292) [user] is_like_space($)
^  Unify: (292) [user] is_like_space($)
   Call: (293) [system] char_type($, end_of_line)
^  Redo: (292) [user] is_like_space($)
^  Unify: (292) [user] is_like_space($)
   Call: (293) [system] char_type($, space)
^  Redo: (292) [user] is_like_space($)
^  Unify: (292) [user] is_like_space($)
   Call: (293) [system] char_type($, cntrl)
^  Redo: (291) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (291) [user] skip_spaces((0x55aefe44e2f0))
   Call: (291) [system] get_char((0x55aefe44e2f0), _222294)
   Exit: (291) [system] get_char((0x55aefe44e2f0), $)
   Call: (291) [system] ($)='('
^  Redo: (290) [user] cont_sexpr(')', (0x55aefe44e2f0), _201796)
   Call: (291) [system] ($)='['
^  Redo: (290) [user] cont_sexpr(')', (0x55aefe44e2f0), _201796)
   Call: (291) [system] ($)='{'
^  Redo: (290) [user] cont_sexpr(')', (0x55aefe44e2f0), _201796)
   Call: (291) [system] ($)='"'
^  Redo: (290) [user] cont_sexpr(')', (0x55aefe44e2f0), _201796)
   Call: (291) [system] ($)=!
^  Redo: (290) [user] cont_sexpr(')', (0x55aefe44e2f0), _201796)
   Call: (291) [system] ($)='\''
^  Redo: (290) [user] cont_sexpr(')', (0x55aefe44e2f0), _201796)
   Call: (291) [system] ($)='`'
^  Redo: (290) [user] cont_sexpr(')', (0x55aefe44e2f0), _201796)
   Call: (291) [system] ($)=end_of_file
^  Redo: (290) [user] cont_sexpr(')', (0x55aefe44e2f0), _201796)
^  Call: (291) [user] read_symbolic(')', (0x55aefe44e2f0), $, _201796)
^  Unify: (291) [user] read_symbolic(')', (0x55aefe44e2f0), $, _201796)
^  Call: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _240904)
^  Unify: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _240904)
   Call: (293) [system] peek_char((0x55aefe44e2f0), _242770)
   Exit: (293) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (293) [user] is_delimiter(l)
^  Unify: (293) [user] is_delimiter(l)
   Call: (294) [system] char_type(l, space)
^  Redo: (293) [user] is_delimiter(l)
   Call: (294) [system] arg(_248410, v('(', ')', end_of_file), l)
^  Redo: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _240904)
   Call: (293) [system] ')'==l
^  Redo: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _240904)
   Call: (293) [system] get_char((0x55aefe44e2f0), l)
   Exit: (293) [system] get_char((0x55aefe44e2f0), l)
   Call: (293) [system] l=(\)
^  Redo: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _240904)
^  Call: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _255776)
^  Unify: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _255776)
   Call: (294) [system] peek_char((0x55aefe44e2f0), _257642)
   Exit: (294) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (294) [user] is_delimiter(i)
^  Unify: (294) [user] is_delimiter(i)
   Call: (295) [system] char_type(i, space)
^  Redo: (294) [user] is_delimiter(i)
   Call: (295) [system] arg(_263282, v('(', ')', end_of_file), i)
^  Redo: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _255776)
   Call: (294) [system] ')'==i
^  Redo: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _255776)
   Call: (294) [system] get_char((0x55aefe44e2f0), i)
   Exit: (294) [system] get_char((0x55aefe44e2f0), i)
   Call: (294) [system] i=(\)
^  Redo: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _255776)
^  Call: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _270648)
^  Unify: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _270648)
   Call: (295) [system] peek_char((0x55aefe44e2f0), _272514)
   Exit: (295) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (295) [user] is_delimiter(s)
^  Unify: (295) [user] is_delimiter(s)
   Call: (296) [system] char_type(s, space)
^  Redo: (295) [user] is_delimiter(s)
   Call: (296) [system] arg(_278154, v('(', ')', end_of_file), s)
^  Redo: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _270648)
   Call: (295) [system] ')'==s
^  Redo: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _270648)
   Call: (295) [system] get_char((0x55aefe44e2f0), s)
   Exit: (295) [system] get_char((0x55aefe44e2f0), s)
   Call: (295) [system] s=(\)
^  Redo: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _270648)
^  Call: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _285520)
^  Unify: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _285520)
   Call: (296) [system] peek_char((0x55aefe44e2f0), _287386)
   Exit: (296) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (296) [user] is_delimiter(t)
^  Unify: (296) [user] is_delimiter(t)
   Call: (297) [system] char_type(t, space)
^  Redo: (296) [user] is_delimiter(t)
   Call: (297) [system] arg(_293026, v('(', ')', end_of_file), t)
^  Redo: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _285520)
   Call: (296) [system] ')'==t
^  Redo: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _285520)
   Call: (296) [system] get_char((0x55aefe44e2f0), t)
   Exit: (296) [system] get_char((0x55aefe44e2f0), t)
   Call: (296) [system] t=(\)
^  Redo: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _285520)
^  Call: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _300392)
^  Unify: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _300392)
   Call: (297) [system] peek_char((0x55aefe44e2f0), _302258)
   Exit: (297) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (297) [user] is_delimiter(' ')
^  Unify: (297) [user] is_delimiter(' ')
   Call: (298) [system] char_type(' ', space)
   Exit: (298) [system] char_type(' ', space)
^  Exit: (297) [user] is_delimiter(' ')
   Call: (297) [system] _300392=[]
   Exit: (297) [system] []=[]
^  Exit: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (296) [system] _285520=[t]
   Exit: (296) [system] [t]=[t]
^  Exit: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t])
   Call: (295) [system] _270648=[s, t]
   Exit: (295) [system] [s, t]=[s, t]
^  Exit: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, t])
   Call: (294) [system] _255776=[i, s, t]
   Exit: (294) [system] [i, s, t]=[i, s, t]
^  Exit: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, s, t])
   Call: (293) [system] _240904=[l, i, s, t]
   Exit: (293) [system] [l, i, s, t]=[l, i, s, t]
^  Exit: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l, i, s, t])
^  Call: (292) [user] classify_and_convert_charseq($, [l, i, s, t], _201796)
^  Unify: (292) [user] classify_and_convert_charseq($, [l, i, s, t], '$VAR'(_323642))
   Call: (293) [system] atom_chars(_323642, ['_', l, i, s, t])
   Exit: (293) [system] atom_chars('_list', ['_', l, i, s, t])
^  Exit: (292) [user] classify_and_convert_charseq($, [l, i, s, t], _list)
^  Exit: (291) [user] read_symbolic(')', (0x55aefe44e2f0), $, _list)
^  Exit: (290) [user] cont_sexpr(')', (0x55aefe44e2f0), _list)
^  Call: (290) [user] read_list(')', (0x55aefe44e2f0), _329238)
^  Unify: (290) [user] read_list(')', (0x55aefe44e2f0), _329238)
^  Call: (291) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (291) [user] skip_spaces((0x55aefe44e2f0))
   Call: (292) [system] peek_char((0x55aefe44e2f0), _332952)
   Exit: (292) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (292) [system] ' '=(;)
^  Redo: (291) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (292) [user] is_like_space(' ')
^  Unify: (292) [user] is_like_space(' ')
   Call: (293) [system] char_type(' ', 'white')
   Exit: (293) [system] char_type(' ', 'white')
^  Exit: (292) [user] is_like_space(' ')
   Call: (292) [system] get_char((0x55aefe44e2f0), _341610)
   Exit: (292) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (292) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (292) [user] skip_spaces((0x55aefe44e2f0))
   Call: (293) [system] peek_char((0x55aefe44e2f0), _345238)
   Exit: (293) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (293) [system] '('=(;)
^  Redo: (292) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (293) [user] is_like_space('(')
^  Unify: (293) [user] is_like_space('(')
   Call: (294) [system] char_type('(', 'white')
^  Redo: (293) [user] is_like_space('(')
^  Unify: (293) [user] is_like_space('(')
   Call: (294) [system] char_type('(', end_of_line)
^  Redo: (293) [user] is_like_space('(')
^  Unify: (293) [user] is_like_space('(')
   Call: (294) [system] char_type('(', space)
^  Redo: (293) [user] is_like_space('(')
^  Unify: (293) [user] is_like_space('(')
   Call: (294) [system] char_type('(', cntrl)
^  Redo: (292) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (292) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (291) [user] skip_spaces((0x55aefe44e2f0))
   Call: (291) [system] peek_char((0x55aefe44e2f0), _362946)
   Exit: (291) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (291) [system] '('=')'
^  Redo: (290) [user] read_list(')', (0x55aefe44e2f0), _329238)
   Call: (291) [system] '('=end_of_file
^  Redo: (290) [user] read_list(')', (0x55aefe44e2f0), _329238)
^  Call: (291) [user] cont_sexpr(')', (0x55aefe44e2f0), _368524)
^  Unify: (291) [user] cont_sexpr(')', (0x55aefe44e2f0), _368524)
^  Call: (292) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (292) [user] skip_spaces((0x55aefe44e2f0))
   Call: (293) [system] peek_char((0x55aefe44e2f0), _372238)
   Exit: (293) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (293) [system] '('=(;)
^  Redo: (292) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (293) [user] is_like_space('(')
^  Unify: (293) [user] is_like_space('(')
   Call: (294) [system] char_type('(', 'white')
^  Redo: (293) [user] is_like_space('(')
^  Unify: (293) [user] is_like_space('(')
   Call: (294) [system] char_type('(', end_of_line)
^  Redo: (293) [user] is_like_space('(')
^  Unify: (293) [user] is_like_space('(')
   Call: (294) [system] char_type('(', space)
^  Redo: (293) [user] is_like_space('(')
^  Unify: (293) [user] is_like_space('(')
   Call: (294) [system] char_type('(', cntrl)
^  Redo: (292) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (292) [user] skip_spaces((0x55aefe44e2f0))
   Call: (292) [system] get_char((0x55aefe44e2f0), _389022)
   Exit: (292) [system] get_char((0x55aefe44e2f0), '(')
   Call: (292) [system] '('='('
   Exit: (292) [system] '('='('
^  Call: (292) [user] read_list(')', (0x55aefe44e2f0), _368524)
^  Unify: (292) [user] read_list(')', (0x55aefe44e2f0), _368524)
^  Call: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (293) [user] skip_spaces((0x55aefe44e2f0))
   Call: (294) [system] peek_char((0x55aefe44e2f0), _396448)
   Exit: (294) [system] peek_char((0x55aefe44e2f0), $)
   Call: (294) [system] ($)=(;)
^  Redo: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (294) [user] is_like_space($)
^  Unify: (294) [user] is_like_space($)
   Call: (295) [system] char_type($, 'white')
^  Redo: (294) [user] is_like_space($)
^  Unify: (294) [user] is_like_space($)
   Call: (295) [system] char_type($, end_of_line)
^  Redo: (294) [user] is_like_space($)
^  Unify: (294) [user] is_like_space($)
   Call: (295) [system] char_type($, space)
^  Redo: (294) [user] is_like_space($)
^  Unify: (294) [user] is_like_space($)
   Call: (295) [system] char_type($, cntrl)
^  Redo: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (293) [user] skip_spaces((0x55aefe44e2f0))
   Call: (293) [system] peek_char((0x55aefe44e2f0), _413232)
   Exit: (293) [system] peek_char((0x55aefe44e2f0), $)
   Call: (293) [system] ($)=')'
^  Redo: (292) [user] read_list(')', (0x55aefe44e2f0), _368524)
   Call: (293) [system] ($)=end_of_file
^  Redo: (292) [user] read_list(')', (0x55aefe44e2f0), _368524)
^  Call: (293) [user] cont_sexpr(')', (0x55aefe44e2f0), _418810)
^  Unify: (293) [user] cont_sexpr(')', (0x55aefe44e2f0), _418810)
^  Call: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (294) [user] skip_spaces((0x55aefe44e2f0))
   Call: (295) [system] peek_char((0x55aefe44e2f0), _422524)
   Exit: (295) [system] peek_char((0x55aefe44e2f0), $)
   Call: (295) [system] ($)=(;)
^  Redo: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (295) [user] is_like_space($)
^  Unify: (295) [user] is_like_space($)
   Call: (296) [system] char_type($, 'white')
^  Redo: (295) [user] is_like_space($)
^  Unify: (295) [user] is_like_space($)
   Call: (296) [system] char_type($, end_of_line)
^  Redo: (295) [user] is_like_space($)
^  Unify: (295) [user] is_like_space($)
   Call: (296) [system] char_type($, space)
^  Redo: (295) [user] is_like_space($)
^  Unify: (295) [user] is_like_space($)
   Call: (296) [system] char_type($, cntrl)
^  Redo: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (294) [user] skip_spaces((0x55aefe44e2f0))
   Call: (294) [system] get_char((0x55aefe44e2f0), _439308)
   Exit: (294) [system] get_char((0x55aefe44e2f0), $)
   Call: (294) [system] ($)='('
^  Redo: (293) [user] cont_sexpr(')', (0x55aefe44e2f0), _418810)
   Call: (294) [system] ($)='['
^  Redo: (293) [user] cont_sexpr(')', (0x55aefe44e2f0), _418810)
   Call: (294) [system] ($)='{'
^  Redo: (293) [user] cont_sexpr(')', (0x55aefe44e2f0), _418810)
   Call: (294) [system] ($)='"'
^  Redo: (293) [user] cont_sexpr(')', (0x55aefe44e2f0), _418810)
   Call: (294) [system] ($)=!
^  Redo: (293) [user] cont_sexpr(')', (0x55aefe44e2f0), _418810)
   Call: (294) [system] ($)='\''
^  Redo: (293) [user] cont_sexpr(')', (0x55aefe44e2f0), _418810)
   Call: (294) [system] ($)='`'
^  Redo: (293) [user] cont_sexpr(')', (0x55aefe44e2f0), _418810)
   Call: (294) [system] ($)=end_of_file
^  Redo: (293) [user] cont_sexpr(')', (0x55aefe44e2f0), _418810)
^  Call: (294) [user] read_symbolic(')', (0x55aefe44e2f0), $, _418810)
^  Unify: (294) [user] read_symbolic(')', (0x55aefe44e2f0), $, _418810)
^  Call: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _457918)
^  Unify: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _457918)
   Call: (296) [system] peek_char((0x55aefe44e2f0), _459784)
   Exit: (296) [system] peek_char((0x55aefe44e2f0), h)
^  Call: (296) [user] is_delimiter(h)
^  Unify: (296) [user] is_delimiter(h)
   Call: (297) [system] char_type(h, space)
^  Redo: (296) [user] is_delimiter(h)
   Call: (297) [system] arg(_465424, v('(', ')', end_of_file), h)
^  Redo: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _457918)
   Call: (296) [system] ')'==h
^  Redo: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _457918)
   Call: (296) [system] get_char((0x55aefe44e2f0), h)
   Exit: (296) [system] get_char((0x55aefe44e2f0), h)
   Call: (296) [system] h=(\)
^  Redo: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _457918)
^  Call: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _472790)
^  Unify: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _472790)
   Call: (297) [system] peek_char((0x55aefe44e2f0), _474656)
   Exit: (297) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (297) [user] is_delimiter(e)
^  Unify: (297) [user] is_delimiter(e)
   Call: (298) [system] char_type(e, space)
^  Redo: (297) [user] is_delimiter(e)
   Call: (298) [system] arg(_480296, v('(', ')', end_of_file), e)
^  Redo: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _472790)
   Call: (297) [system] ')'==e
^  Redo: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _472790)
   Call: (297) [system] get_char((0x55aefe44e2f0), e)
   Exit: (297) [system] get_char((0x55aefe44e2f0), e)
   Call: (297) [system] e=(\)
^  Redo: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _472790)
^  Call: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _487662)
^  Unify: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _487662)
   Call: (298) [system] peek_char((0x55aefe44e2f0), _489528)
   Exit: (298) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (298) [user] is_delimiter(a)
^  Unify: (298) [user] is_delimiter(a)
   Call: (299) [system] char_type(a, space)
^  Redo: (298) [user] is_delimiter(a)
   Call: (299) [system] arg(_495168, v('(', ')', end_of_file), a)
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _487662)
   Call: (298) [system] ')'==a
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _487662)
   Call: (298) [system] get_char((0x55aefe44e2f0), a)
   Exit: (298) [system] get_char((0x55aefe44e2f0), a)
   Call: (298) [system] a=(\)
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _487662)
^  Call: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _502534)
^  Unify: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _502534)
   Call: (299) [system] peek_char((0x55aefe44e2f0), _504400)
   Exit: (299) [system] peek_char((0x55aefe44e2f0), d)
^  Call: (299) [user] is_delimiter(d)
^  Unify: (299) [user] is_delimiter(d)
   Call: (300) [system] char_type(d, space)
^  Redo: (299) [user] is_delimiter(d)
   Call: (300) [system] arg(_510040, v('(', ')', end_of_file), d)
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _502534)
   Call: (299) [system] ')'==d
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _502534)
   Call: (299) [system] get_char((0x55aefe44e2f0), d)
   Exit: (299) [system] get_char((0x55aefe44e2f0), d)
   Call: (299) [system] d=(\)
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _502534)
^  Call: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _517406)
^  Unify: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _517406)
   Call: (300) [system] peek_char((0x55aefe44e2f0), _519272)
   Exit: (300) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (300) [user] is_delimiter(' ')
^  Unify: (300) [user] is_delimiter(' ')
   Call: (301) [system] char_type(' ', space)
   Exit: (301) [system] char_type(' ', space)
^  Exit: (300) [user] is_delimiter(' ')
   Call: (300) [system] _6214=[]
   Exit: (300) [system] []=[]
^  Exit: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (299) [system] _6210=[d]
   Exit: (299) [system] [d]=[d]
^  Exit: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [d])
   Call: (298) [system] _6206=[a, d]
   Exit: (298) [system] [a, d]=[a, d]
^  Exit: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, d])
   Call: (297) [system] _6202=[e, a, d]
   Exit: (297) [system] [e, a, d]=[e, a, d]
^  Exit: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, a, d])
   Call: (296) [system] _6198=[h, e, a, d]
   Exit: (296) [system] [h, e, a, d]=[h, e, a, d]
^  Exit: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [h, e, a, d])
^  Call: (295) [user] classify_and_convert_charseq($, [h, e, a, d], _6194)
^  Unify: (295) [user] classify_and_convert_charseq($, [h, e, a, d], '$VAR'(_22900))
   Call: (296) [system] atom_chars(_22900, ['_', h, e, a, d])
   Exit: (296) [system] atom_chars('_head', ['_', h, e, a, d])
^  Exit: (295) [user] classify_and_convert_charseq($, [h, e, a, d], _head)
^  Exit: (294) [user] read_symbolic(')', (0x55aefe44e2f0), $, _head)
^  Exit: (293) [user] cont_sexpr(')', (0x55aefe44e2f0), _head)
^  Call: (293) [user] read_list(')', (0x55aefe44e2f0), _28496)
^  Unify: (293) [user] read_list(')', (0x55aefe44e2f0), _28496)
^  Call: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (294) [user] skip_spaces((0x55aefe44e2f0))
   Call: (295) [system] peek_char((0x55aefe44e2f0), _32210)
   Exit: (295) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (295) [system] ' '=(;)
^  Redo: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (295) [user] is_like_space(' ')
^  Unify: (295) [user] is_like_space(' ')
   Call: (296) [system] char_type(' ', 'white')
   Exit: (296) [system] char_type(' ', 'white')
^  Exit: (295) [user] is_like_space(' ')
   Call: (295) [system] get_char((0x55aefe44e2f0), _40868)
   Exit: (295) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (295) [user] skip_spaces((0x55aefe44e2f0))
   Call: (296) [system] peek_char((0x55aefe44e2f0), _44496)
   Exit: (296) [system] peek_char((0x55aefe44e2f0), $)
   Call: (296) [system] ($)=(;)
^  Redo: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (296) [user] is_like_space($)
^  Unify: (296) [user] is_like_space($)
   Call: (297) [system] char_type($, 'white')
^  Redo: (296) [user] is_like_space($)
^  Unify: (296) [user] is_like_space($)
   Call: (297) [system] char_type($, end_of_line)
^  Redo: (296) [user] is_like_space($)
^  Unify: (296) [user] is_like_space($)
   Call: (297) [system] char_type($, space)
^  Redo: (296) [user] is_like_space($)
^  Unify: (296) [user] is_like_space($)
   Call: (297) [system] char_type($, cntrl)
^  Redo: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (294) [user] skip_spaces((0x55aefe44e2f0))
   Call: (294) [system] peek_char((0x55aefe44e2f0), _62204)
   Exit: (294) [system] peek_char((0x55aefe44e2f0), $)
   Call: (294) [system] ($)=')'
^  Redo: (293) [user] read_list(')', (0x55aefe44e2f0), _28496)
   Call: (294) [system] ($)=end_of_file
^  Redo: (293) [user] read_list(')', (0x55aefe44e2f0), _28496)
^  Call: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), _67782)
^  Unify: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), _67782)
^  Call: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (295) [user] skip_spaces((0x55aefe44e2f0))
   Call: (296) [system] peek_char((0x55aefe44e2f0), _71496)
   Exit: (296) [system] peek_char((0x55aefe44e2f0), $)
   Call: (296) [system] ($)=(;)
^  Redo: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (296) [user] is_like_space($)
^  Unify: (296) [user] is_like_space($)
   Call: (297) [system] char_type($, 'white')
^  Redo: (296) [user] is_like_space($)
^  Unify: (296) [user] is_like_space($)
   Call: (297) [system] char_type($, end_of_line)
^  Redo: (296) [user] is_like_space($)
^  Unify: (296) [user] is_like_space($)
   Call: (297) [system] char_type($, space)
^  Redo: (296) [user] is_like_space($)
^  Unify: (296) [user] is_like_space($)
   Call: (297) [system] char_type($, cntrl)
^  Redo: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (295) [user] skip_spaces((0x55aefe44e2f0))
   Call: (295) [system] get_char((0x55aefe44e2f0), _88280)
   Exit: (295) [system] get_char((0x55aefe44e2f0), $)
   Call: (295) [system] ($)='('
^  Redo: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), _67782)
   Call: (295) [system] ($)='['
^  Redo: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), _67782)
   Call: (295) [system] ($)='{'
^  Redo: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), _67782)
   Call: (295) [system] ($)='"'
^  Redo: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), _67782)
   Call: (295) [system] ($)=!
^  Redo: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), _67782)
   Call: (295) [system] ($)='\''
^  Redo: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), _67782)
   Call: (295) [system] ($)='`'
^  Redo: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), _67782)
   Call: (295) [system] ($)=end_of_file
^  Redo: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), _67782)
^  Call: (295) [user] read_symbolic(')', (0x55aefe44e2f0), $, _67782)
^  Unify: (295) [user] read_symbolic(')', (0x55aefe44e2f0), $, _67782)
^  Call: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _106890)
^  Unify: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _106890)
   Call: (297) [system] peek_char((0x55aefe44e2f0), _108756)
   Exit: (297) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (297) [user] is_delimiter(t)
^  Unify: (297) [user] is_delimiter(t)
   Call: (298) [system] char_type(t, space)
^  Redo: (297) [user] is_delimiter(t)
   Call: (298) [system] arg(_114396, v('(', ')', end_of_file), t)
^  Redo: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _106890)
   Call: (297) [system] ')'==t
^  Redo: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _106890)
   Call: (297) [system] get_char((0x55aefe44e2f0), t)
   Exit: (297) [system] get_char((0x55aefe44e2f0), t)
   Call: (297) [system] t=(\)
^  Redo: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _106890)
^  Call: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _121762)
^  Unify: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _121762)
   Call: (298) [system] peek_char((0x55aefe44e2f0), _123628)
   Exit: (298) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (298) [user] is_delimiter(a)
^  Unify: (298) [user] is_delimiter(a)
   Call: (299) [system] char_type(a, space)
^  Redo: (298) [user] is_delimiter(a)
   Call: (299) [system] arg(_129268, v('(', ')', end_of_file), a)
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _121762)
   Call: (298) [system] ')'==a
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _121762)
   Call: (298) [system] get_char((0x55aefe44e2f0), a)
   Exit: (298) [system] get_char((0x55aefe44e2f0), a)
   Call: (298) [system] a=(\)
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _121762)
^  Call: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _136634)
^  Unify: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _136634)
   Call: (299) [system] peek_char((0x55aefe44e2f0), _138500)
   Exit: (299) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (299) [user] is_delimiter(i)
^  Unify: (299) [user] is_delimiter(i)
   Call: (300) [system] char_type(i, space)
^  Redo: (299) [user] is_delimiter(i)
   Call: (300) [system] arg(_144140, v('(', ')', end_of_file), i)
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _136634)
   Call: (299) [system] ')'==i
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _136634)
   Call: (299) [system] get_char((0x55aefe44e2f0), i)
   Exit: (299) [system] get_char((0x55aefe44e2f0), i)
   Call: (299) [system] i=(\)
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _136634)
^  Call: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _151506)
^  Unify: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _151506)
   Call: (300) [system] peek_char((0x55aefe44e2f0), _153372)
   Exit: (300) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (300) [user] is_delimiter(l)
^  Unify: (300) [user] is_delimiter(l)
   Call: (301) [system] char_type(l, space)
^  Redo: (300) [user] is_delimiter(l)
   Call: (301) [system] arg(_159012, v('(', ')', end_of_file), l)
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _151506)
   Call: (300) [system] ')'==l
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _151506)
   Call: (300) [system] get_char((0x55aefe44e2f0), l)
   Exit: (300) [system] get_char((0x55aefe44e2f0), l)
   Call: (300) [system] l=(\)
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _151506)
^  Call: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _166378)
^  Unify: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _166378)
   Call: (301) [system] peek_char((0x55aefe44e2f0), _168244)
   Exit: (301) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (301) [user] is_delimiter(')')
^  Unify: (301) [user] is_delimiter(')')
   Call: (302) [system] char_type(')', space)
^  Redo: (301) [user] is_delimiter(')')
   Call: (302) [system] arg(_173884, v('(', ')', end_of_file), ')')
   Exit: (302) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (301) [user] is_delimiter(')')
   Call: (301) [system] _166378=[]
   Exit: (301) [system] []=[]
^  Exit: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (300) [system] _151506=[l]
   Exit: (300) [system] [l]=[l]
^  Exit: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l])
   Call: (299) [system] _136634=[i, l]
   Exit: (299) [system] [i, l]=[i, l]
^  Exit: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, l])
   Call: (298) [system] _121762=[a, i, l]
   Exit: (298) [system] [a, i, l]=[a, i, l]
^  Exit: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, i, l])
   Call: (297) [system] _106890=[t, a, i, l]
   Exit: (297) [system] [t, a, i, l]=[t, a, i, l]
^  Exit: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, a, i, l])
^  Call: (296) [user] classify_and_convert_charseq($, [t, a, i, l], _67782)
^  Unify: (296) [user] classify_and_convert_charseq($, [t, a, i, l], '$VAR'(_191496))
   Call: (297) [system] atom_chars(_191496, ['_', t, a, i, l])
   Exit: (297) [system] atom_chars('_tail', ['_', t, a, i, l])
^  Exit: (296) [user] classify_and_convert_charseq($, [t, a, i, l], _tail)
^  Exit: (295) [user] read_symbolic(')', (0x55aefe44e2f0), $, _tail)
^  Exit: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), _tail)
^  Call: (294) [user] read_list(')', (0x55aefe44e2f0), _197092)
^  Unify: (294) [user] read_list(')', (0x55aefe44e2f0), _197092)
^  Call: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (295) [user] skip_spaces((0x55aefe44e2f0))
   Call: (296) [system] peek_char((0x55aefe44e2f0), _200806)
   Exit: (296) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (296) [system] ')'=(;)
^  Redo: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (296) [user] is_like_space(')')
^  Unify: (296) [user] is_like_space(')')
   Call: (297) [system] char_type(')', 'white')
^  Redo: (296) [user] is_like_space(')')
^  Unify: (296) [user] is_like_space(')')
   Call: (297) [system] char_type(')', end_of_line)
^  Redo: (296) [user] is_like_space(')')
^  Unify: (296) [user] is_like_space(')')
   Call: (297) [system] char_type(')', space)
^  Redo: (296) [user] is_like_space(')')
^  Unify: (296) [user] is_like_space(')')
   Call: (297) [system] char_type(')', cntrl)
^  Redo: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (295) [user] skip_spaces((0x55aefe44e2f0))
   Call: (295) [system] peek_char((0x55aefe44e2f0), _217590)
   Exit: (295) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (295) [system] ')'=')'
   Exit: (295) [system] ')'=')'
   Call: (295) [system] get_char((0x55aefe44e2f0), _221380)
   Exit: (295) [system] get_char((0x55aefe44e2f0), ')')
   Call: (295) [system] _197092=[]
   Exit: (295) [system] []=[]
^  Exit: (294) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (294) [system] _28496=[_tail]
   Exit: (294) [system] [_tail]=[_tail]
^  Exit: (293) [user] read_list(')', (0x55aefe44e2f0), [_tail])
   Call: (293) [system] _6188=[_head, _tail]
   Exit: (293) [system] [_head, _tail]=[_head, _tail]
^  Exit: (292) [user] read_list(')', (0x55aefe44e2f0), [_head, _tail])
^  Exit: (291) [user] cont_sexpr(')', (0x55aefe44e2f0), [_head, _tail])
^  Call: (291) [user] read_list(')', (0x55aefe44e2f0), _232468)
^  Unify: (291) [user] read_list(')', (0x55aefe44e2f0), _232468)
^  Call: (292) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (292) [user] skip_spaces((0x55aefe44e2f0))
   Call: (293) [system] peek_char((0x55aefe44e2f0), _236182)
   Exit: (293) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (293) [system] ' '=(;)
^  Redo: (292) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (293) [user] is_like_space(' ')
^  Unify: (293) [user] is_like_space(' ')
   Call: (294) [system] char_type(' ', 'white')
   Exit: (294) [system] char_type(' ', 'white')
^  Exit: (293) [user] is_like_space(' ')
   Call: (293) [system] get_char((0x55aefe44e2f0), _244840)
   Exit: (293) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (293) [user] skip_spaces((0x55aefe44e2f0))
   Call: (294) [system] peek_char((0x55aefe44e2f0), _248468)
   Exit: (294) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (294) [system] '('=(;)
^  Redo: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (294) [user] is_like_space('(')
^  Unify: (294) [user] is_like_space('(')
   Call: (295) [system] char_type('(', 'white')
^  Redo: (294) [user] is_like_space('(')
^  Unify: (294) [user] is_like_space('(')
   Call: (295) [system] char_type('(', end_of_line)
^  Redo: (294) [user] is_like_space('(')
^  Unify: (294) [user] is_like_space('(')
   Call: (295) [system] char_type('(', space)
^  Redo: (294) [user] is_like_space('(')
^  Unify: (294) [user] is_like_space('(')
   Call: (295) [system] char_type('(', cntrl)
^  Redo: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (292) [user] skip_spaces((0x55aefe44e2f0))
   Call: (292) [system] peek_char((0x55aefe44e2f0), _266176)
   Exit: (292) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (292) [system] '('=')'
^  Redo: (291) [user] read_list(')', (0x55aefe44e2f0), _232468)
   Call: (292) [system] '('=end_of_file
^  Redo: (291) [user] read_list(')', (0x55aefe44e2f0), _232468)
^  Call: (292) [user] cont_sexpr(')', (0x55aefe44e2f0), _271754)
^  Unify: (292) [user] cont_sexpr(')', (0x55aefe44e2f0), _271754)
^  Call: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (293) [user] skip_spaces((0x55aefe44e2f0))
   Call: (294) [system] peek_char((0x55aefe44e2f0), _275468)
   Exit: (294) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (294) [system] '('=(;)
^  Redo: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (294) [user] is_like_space('(')
^  Unify: (294) [user] is_like_space('(')
   Call: (295) [system] char_type('(', 'white')
^  Redo: (294) [user] is_like_space('(')
^  Unify: (294) [user] is_like_space('(')
   Call: (295) [system] char_type('(', end_of_line)
^  Redo: (294) [user] is_like_space('(')
^  Unify: (294) [user] is_like_space('(')
   Call: (295) [system] char_type('(', space)
^  Redo: (294) [user] is_like_space('(')
^  Unify: (294) [user] is_like_space('(')
   Call: (295) [system] char_type('(', cntrl)
^  Redo: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (293) [user] skip_spaces((0x55aefe44e2f0))
   Call: (293) [system] get_char((0x55aefe44e2f0), _292252)
   Exit: (293) [system] get_char((0x55aefe44e2f0), '(')
   Call: (293) [system] '('='('
   Exit: (293) [system] '('='('
^  Call: (293) [user] read_list(')', (0x55aefe44e2f0), _271754)
^  Unify: (293) [user] read_list(')', (0x55aefe44e2f0), _271754)
^  Call: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (294) [user] skip_spaces((0x55aefe44e2f0))
   Call: (295) [system] peek_char((0x55aefe44e2f0), _299678)
   Exit: (295) [system] peek_char((0x55aefe44e2f0), r)
   Call: (295) [system] r=(;)
^  Redo: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (295) [user] is_like_space(r)
^  Unify: (295) [user] is_like_space(r)
   Call: (296) [system] char_type(r, 'white')
^  Redo: (295) [user] is_like_space(r)
^  Unify: (295) [user] is_like_space(r)
   Call: (296) [system] char_type(r, end_of_line)
^  Redo: (295) [user] is_like_space(r)
^  Unify: (295) [user] is_like_space(r)
   Call: (296) [system] char_type(r, space)
^  Redo: (295) [user] is_like_space(r)
^  Unify: (295) [user] is_like_space(r)
   Call: (296) [system] char_type(r, cntrl)
^  Redo: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (294) [user] skip_spaces((0x55aefe44e2f0))
   Call: (294) [system] peek_char((0x55aefe44e2f0), _316462)
   Exit: (294) [system] peek_char((0x55aefe44e2f0), r)
   Call: (294) [system] r=')'
^  Redo: (293) [user] read_list(')', (0x55aefe44e2f0), _271754)
   Call: (294) [system] r=end_of_file
^  Redo: (293) [user] read_list(')', (0x55aefe44e2f0), _271754)
^  Call: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), _322040)
^  Unify: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), _322040)
^  Call: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (295) [user] skip_spaces((0x55aefe44e2f0))
   Call: (296) [system] peek_char((0x55aefe44e2f0), _325754)
   Exit: (296) [system] peek_char((0x55aefe44e2f0), r)
   Call: (296) [system] r=(;)
^  Redo: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (296) [user] is_like_space(r)
^  Unify: (296) [user] is_like_space(r)
   Call: (297) [system] char_type(r, 'white')
^  Redo: (296) [user] is_like_space(r)
^  Unify: (296) [user] is_like_space(r)
   Call: (297) [system] char_type(r, end_of_line)
^  Redo: (296) [user] is_like_space(r)
^  Unify: (296) [user] is_like_space(r)
   Call: (297) [system] char_type(r, space)
^  Redo: (296) [user] is_like_space(r)
^  Unify: (296) [user] is_like_space(r)
   Call: (297) [system] char_type(r, cntrl)
^  Redo: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (295) [user] skip_spaces((0x55aefe44e2f0))
   Call: (295) [system] get_char((0x55aefe44e2f0), _342538)
   Exit: (295) [system] get_char((0x55aefe44e2f0), r)
   Call: (295) [system] r='('
^  Redo: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), _322040)
   Call: (295) [system] r='['
^  Redo: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), _322040)
   Call: (295) [system] r='{'
^  Redo: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), _322040)
   Call: (295) [system] r='"'
^  Redo: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), _322040)
   Call: (295) [system] r=!
^  Redo: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), _322040)
   Call: (295) [system] r='\''
^  Redo: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), _322040)
   Call: (295) [system] r='`'
^  Redo: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), _322040)
   Call: (295) [system] r=end_of_file
^  Redo: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), _322040)
^  Call: (295) [user] read_symbolic(')', (0x55aefe44e2f0), r, _322040)
^  Unify: (295) [user] read_symbolic(')', (0x55aefe44e2f0), r, _322040)
^  Call: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _361148)
^  Unify: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _361148)
   Call: (297) [system] peek_char((0x55aefe44e2f0), _363014)
   Exit: (297) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (297) [user] is_delimiter(e)
^  Unify: (297) [user] is_delimiter(e)
   Call: (298) [system] char_type(e, space)
^  Redo: (297) [user] is_delimiter(e)
   Call: (298) [system] arg(_368654, v('(', ')', end_of_file), e)
^  Redo: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _361148)
   Call: (297) [system] ')'==e
^  Redo: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _361148)
   Call: (297) [system] get_char((0x55aefe44e2f0), e)
   Exit: (297) [system] get_char((0x55aefe44e2f0), e)
   Call: (297) [system] e=(\)
^  Redo: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _361148)
^  Call: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _376020)
^  Unify: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _376020)
   Call: (298) [system] peek_char((0x55aefe44e2f0), _377886)
   Exit: (298) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (298) [user] is_delimiter(t)
^  Unify: (298) [user] is_delimiter(t)
   Call: (299) [system] char_type(t, space)
^  Redo: (298) [user] is_delimiter(t)
   Call: (299) [system] arg(_383526, v('(', ')', end_of_file), t)
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _376020)
   Call: (298) [system] ')'==t
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _376020)
   Call: (298) [system] get_char((0x55aefe44e2f0), t)
   Exit: (298) [system] get_char((0x55aefe44e2f0), t)
   Call: (298) [system] t=(\)
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _376020)
^  Call: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _390892)
^  Unify: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _390892)
   Call: (299) [system] peek_char((0x55aefe44e2f0), _392758)
   Exit: (299) [system] peek_char((0x55aefe44e2f0), u)
^  Call: (299) [user] is_delimiter(u)
^  Unify: (299) [user] is_delimiter(u)
   Call: (300) [system] char_type(u, space)
^  Redo: (299) [user] is_delimiter(u)
   Call: (300) [system] arg(_398398, v('(', ')', end_of_file), u)
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _390892)
   Call: (299) [system] ')'==u
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _390892)
   Call: (299) [system] get_char((0x55aefe44e2f0), u)
   Exit: (299) [system] get_char((0x55aefe44e2f0), u)
   Call: (299) [system] u=(\)
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _390892)
^  Call: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _405764)
^  Unify: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _405764)
   Call: (300) [system] peek_char((0x55aefe44e2f0), _407630)
   Exit: (300) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (300) [user] is_delimiter(r)
^  Unify: (300) [user] is_delimiter(r)
   Call: (301) [system] char_type(r, space)
^  Redo: (300) [user] is_delimiter(r)
   Call: (301) [system] arg(_413270, v('(', ')', end_of_file), r)
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _405764)
   Call: (300) [system] ')'==r
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _405764)
   Call: (300) [system] get_char((0x55aefe44e2f0), r)
   Exit: (300) [system] get_char((0x55aefe44e2f0), r)
   Call: (300) [system] r=(\)
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _405764)
^  Call: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _420636)
^  Unify: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _420636)
   Call: (301) [system] peek_char((0x55aefe44e2f0), _422502)
   Exit: (301) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (301) [user] is_delimiter(n)
^  Unify: (301) [user] is_delimiter(n)
   Call: (302) [system] char_type(n, space)
^  Redo: (301) [user] is_delimiter(n)
   Call: (302) [system] arg(_428142, v('(', ')', end_of_file), n)
^  Redo: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _420636)
   Call: (301) [system] ')'==n
^  Redo: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _420636)
   Call: (301) [system] get_char((0x55aefe44e2f0), n)
   Exit: (301) [system] get_char((0x55aefe44e2f0), n)
   Call: (301) [system] n=(\)
^  Redo: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _420636)
^  Call: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _435508)
^  Unify: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _435508)
   Call: (302) [system] peek_char((0x55aefe44e2f0), _437374)
   Exit: (302) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (302) [user] is_delimiter(' ')
^  Unify: (302) [user] is_delimiter(' ')
   Call: (303) [system] char_type(' ', space)
   Exit: (303) [system] char_type(' ', space)
^  Exit: (302) [user] is_delimiter(' ')
   Call: (302) [system] _435508=[]
   Exit: (302) [system] []=[]
^  Exit: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (301) [system] _420636=[n]
   Exit: (301) [system] [n]=[n]
^  Exit: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (300) [system] _405764=[r, n]
   Exit: (300) [system] [r, n]=[r, n]
^  Exit: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, n])
   Call: (299) [system] _390892=[u, r, n]
   Exit: (299) [system] [u, r, n]=[u, r, n]
^  Exit: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [u, r, n])
   Call: (298) [system] _376020=[t, u, r, n]
   Exit: (298) [system] [t, u, r, n]=[t, u, r, n]
^  Exit: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, u, r, n])
   Call: (297) [system] _361148=[e, t, u, r, n]
   Exit: (297) [system] [e, t, u, r, n]=[e, t, u, r, n]
^  Exit: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, t, u, r, n])
^  Call: (296) [user] classify_and_convert_charseq(r, [e, t, u, r, n], _322040)
^  Unify: (296) [user] classify_and_convert_charseq(r, [e, t, u, r, n], _322040)
^  Call: (298) [system] setup_call_cleanup('$notrace'(_462510, _462512), once(user:catch(read_from_chars([r, e, t, u, r, n], _322040), _462486, fail)), '$restore_trace'(_462510, _462512))
^  Unify: (298) [system] setup_call_cleanup(system:'$notrace'(_462510, _462512), system:once(user:catch(read_from_chars([r, e, t, u, r, n], _322040), _462486, fail)), system:'$restore_trace'(_462510, _462512))
^  Call: (299) [system] sig_atomic(system:'$notrace'(_462510, _462512))
^  Exit: (298) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([r, e, t, u, r, n], return), _462486, fail)), system:'$restore_trace'(3, -1))
   Call: (297) [system] atomic(return)
   Exit: (297) [system] atomic(return)
^  Exit: (296) [user] classify_and_convert_charseq(r, [e, t, u, r, n], return)
^  Exit: (295) [user] read_symbolic(')', (0x55aefe44e2f0), r, return)
^  Exit: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), return)
^  Call: (294) [user] read_list(')', (0x55aefe44e2f0), _470948)
^  Unify: (294) [user] read_list(')', (0x55aefe44e2f0), _470948)
^  Call: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (295) [user] skip_spaces((0x55aefe44e2f0))
   Call: (296) [system] peek_char((0x55aefe44e2f0), _474662)
   Exit: (296) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (296) [system] ' '=(;)
^  Redo: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (296) [user] is_like_space(' ')
^  Unify: (296) [user] is_like_space(' ')
   Call: (297) [system] char_type(' ', 'white')
   Exit: (297) [system] char_type(' ', 'white')
^  Exit: (296) [user] is_like_space(' ')
   Call: (296) [system] get_char((0x55aefe44e2f0), _483320)
   Exit: (296) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (296) [user] skip_spaces((0x55aefe44e2f0))
   Call: (297) [system] peek_char((0x55aefe44e2f0), _486948)
   Exit: (297) [system] peek_char((0x55aefe44e2f0), $)
   Call: (297) [system] ($)=(;)
^  Redo: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (297) [user] is_like_space($)
^  Unify: (297) [user] is_like_space($)
   Call: (298) [system] char_type($, 'white')
^  Redo: (297) [user] is_like_space($)
^  Unify: (297) [user] is_like_space($)
   Call: (298) [system] char_type($, end_of_line)
^  Redo: (297) [user] is_like_space($)
^  Unify: (297) [user] is_like_space($)
   Call: (298) [system] char_type($, space)
^  Redo: (297) [user] is_like_space($)
^  Unify: (297) [user] is_like_space($)
   Call: (298) [system] char_type($, cntrl)
^  Redo: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (295) [user] skip_spaces((0x55aefe44e2f0))
   Call: (295) [system] peek_char((0x55aefe44e2f0), _504656)
   Exit: (295) [system] peek_char((0x55aefe44e2f0), $)
   Call: (295) [system] ($)=')'
^  Redo: (294) [user] read_list(')', (0x55aefe44e2f0), _470948)
   Call: (295) [system] ($)=end_of_file
^  Redo: (294) [user] read_list(')', (0x55aefe44e2f0), _470948)
^  Call: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), _510234)
^  Unify: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), _510234)
^  Call: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (296) [user] skip_spaces((0x55aefe44e2f0))
   Call: (297) [system] peek_char((0x55aefe44e2f0), _513948)
   Exit: (297) [system] peek_char((0x55aefe44e2f0), $)
   Call: (297) [system] ($)=(;)
^  Redo: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (297) [user] is_like_space($)
^  Unify: (297) [user] is_like_space($)
   Call: (298) [system] char_type($, 'white')
^  Redo: (297) [user] is_like_space($)
^  Unify: (297) [user] is_like_space($)
   Call: (298) [system] char_type($, end_of_line)
^  Redo: (297) [user] is_like_space($)
^  Unify: (297) [user] is_like_space($)
   Call: (298) [system] char_type($, space)
^  Redo: (297) [user] is_like_space($)
^  Unify: (297) [user] is_like_space($)
   Call: (298) [system] char_type($, cntrl)
^  Redo: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (296) [user] skip_spaces((0x55aefe44e2f0))
   Call: (296) [system] get_char((0x55aefe44e2f0), _13056)
   Exit: (296) [system] get_char((0x55aefe44e2f0), $)
   Call: (296) [system] ($)='('
^  Redo: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), _6226)
   Call: (296) [system] ($)='['
^  Redo: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), _6226)
   Call: (296) [system] ($)='{'
^  Redo: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), _6226)
   Call: (296) [system] ($)='"'
^  Redo: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), _6226)
   Call: (296) [system] ($)=!
^  Redo: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), _6226)
   Call: (296) [system] ($)='\''
^  Redo: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), _6226)
   Call: (296) [system] ($)='`'
^  Redo: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), _6226)
   Call: (296) [system] ($)=end_of_file
^  Redo: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), _6226)
^  Call: (296) [user] read_symbolic(')', (0x55aefe44e2f0), $, _6226)
^  Unify: (296) [user] read_symbolic(')', (0x55aefe44e2f0), $, _6226)
^  Call: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31666)
^  Unify: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31666)
   Call: (298) [system] peek_char((0x55aefe44e2f0), _33532)
   Exit: (298) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (298) [user] is_delimiter(t)
^  Unify: (298) [user] is_delimiter(t)
   Call: (299) [system] char_type(t, space)
^  Redo: (298) [user] is_delimiter(t)
   Call: (299) [system] arg(_39172, v('(', ')', end_of_file), t)
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31666)
   Call: (298) [system] ')'==t
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31666)
   Call: (298) [system] get_char((0x55aefe44e2f0), t)
   Exit: (298) [system] get_char((0x55aefe44e2f0), t)
   Call: (298) [system] t=(\)
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31666)
^  Call: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _46538)
^  Unify: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _46538)
   Call: (299) [system] peek_char((0x55aefe44e2f0), _48404)
   Exit: (299) [system] peek_char((0x55aefe44e2f0), h)
^  Call: (299) [user] is_delimiter(h)
^  Unify: (299) [user] is_delimiter(h)
   Call: (300) [system] char_type(h, space)
^  Redo: (299) [user] is_delimiter(h)
   Call: (300) [system] arg(_54044, v('(', ')', end_of_file), h)
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _46538)
   Call: (299) [system] ')'==h
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _46538)
   Call: (299) [system] get_char((0x55aefe44e2f0), h)
   Exit: (299) [system] get_char((0x55aefe44e2f0), h)
   Call: (299) [system] h=(\)
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _46538)
^  Call: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _61410)
^  Unify: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _61410)
   Call: (300) [system] peek_char((0x55aefe44e2f0), _63276)
   Exit: (300) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (300) [user] is_delimiter(e)
^  Unify: (300) [user] is_delimiter(e)
   Call: (301) [system] char_type(e, space)
^  Redo: (300) [user] is_delimiter(e)
   Call: (301) [system] arg(_68916, v('(', ')', end_of_file), e)
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _61410)
   Call: (300) [system] ')'==e
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _61410)
   Call: (300) [system] get_char((0x55aefe44e2f0), e)
   Exit: (300) [system] get_char((0x55aefe44e2f0), e)
   Call: (300) [system] e=(\)
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _61410)
^  Call: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _76282)
^  Unify: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _76282)
   Call: (301) [system] peek_char((0x55aefe44e2f0), _78148)
   Exit: (301) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (301) [user] is_delimiter(n)
^  Unify: (301) [user] is_delimiter(n)
   Call: (302) [system] char_type(n, space)
^  Redo: (301) [user] is_delimiter(n)
   Call: (302) [system] arg(_83788, v('(', ')', end_of_file), n)
^  Redo: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _76282)
   Call: (301) [system] ')'==n
^  Redo: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _76282)
   Call: (301) [system] get_char((0x55aefe44e2f0), n)
   Exit: (301) [system] get_char((0x55aefe44e2f0), n)
   Call: (301) [system] n=(\)
^  Redo: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _76282)
^  Call: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _91154)
^  Unify: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _91154)
   Call: (302) [system] peek_char((0x55aefe44e2f0), _93020)
   Exit: (302) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (302) [user] is_delimiter(')')
^  Unify: (302) [user] is_delimiter(')')
   Call: (303) [system] char_type(')', space)
^  Redo: (302) [user] is_delimiter(')')
   Call: (303) [system] arg(_98660, v('(', ')', end_of_file), ')')
   Exit: (303) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (302) [user] is_delimiter(')')
   Call: (302) [system] _91154=[]
   Exit: (302) [system] []=[]
^  Exit: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (301) [system] _76282=[n]
   Exit: (301) [system] [n]=[n]
^  Exit: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (300) [system] _61410=[e, n]
   Exit: (300) [system] [e, n]=[e, n]
^  Exit: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, n])
   Call: (299) [system] _46538=[h, e, n]
   Exit: (299) [system] [h, e, n]=[h, e, n]
^  Exit: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [h, e, n])
   Call: (298) [system] _31666=[t, h, e, n]
   Exit: (298) [system] [t, h, e, n]=[t, h, e, n]
^  Exit: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, h, e, n])
^  Call: (297) [user] classify_and_convert_charseq($, [t, h, e, n], _6226)
^  Unify: (297) [user] classify_and_convert_charseq($, [t, h, e, n], '$VAR'(_116272))
   Call: (298) [system] atom_chars(_116272, ['_', t, h, e, n])
   Exit: (298) [system] atom_chars('_then', ['_', t, h, e, n])
^  Exit: (297) [user] classify_and_convert_charseq($, [t, h, e, n], _then)
^  Exit: (296) [user] read_symbolic(')', (0x55aefe44e2f0), $, _then)
^  Exit: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), _then)
^  Call: (295) [user] read_list(')', (0x55aefe44e2f0), _121868)
^  Unify: (295) [user] read_list(')', (0x55aefe44e2f0), _121868)
^  Call: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (296) [user] skip_spaces((0x55aefe44e2f0))
   Call: (297) [system] peek_char((0x55aefe44e2f0), _125582)
   Exit: (297) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (297) [system] ')'=(;)
^  Redo: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (297) [user] is_like_space(')')
^  Unify: (297) [user] is_like_space(')')
   Call: (298) [system] char_type(')', 'white')
^  Redo: (297) [user] is_like_space(')')
^  Unify: (297) [user] is_like_space(')')
   Call: (298) [system] char_type(')', end_of_line)
^  Redo: (297) [user] is_like_space(')')
^  Unify: (297) [user] is_like_space(')')
   Call: (298) [system] char_type(')', space)
^  Redo: (297) [user] is_like_space(')')
^  Unify: (297) [user] is_like_space(')')
   Call: (298) [system] char_type(')', cntrl)
^  Redo: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (296) [user] skip_spaces((0x55aefe44e2f0))
   Call: (296) [system] peek_char((0x55aefe44e2f0), _142366)
   Exit: (296) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (296) [system] ')'=')'
   Exit: (296) [system] ')'=')'
   Call: (296) [system] get_char((0x55aefe44e2f0), _146156)
   Exit: (296) [system] get_char((0x55aefe44e2f0), ')')
   Call: (296) [system] _121868=[]
   Exit: (296) [system] []=[]
^  Exit: (295) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (295) [system] _6222=[_then]
   Exit: (295) [system] [_then]=[_then]
^  Exit: (294) [user] read_list(')', (0x55aefe44e2f0), [_then])
   Call: (294) [system] _6214=[return, _then]
   Exit: (294) [system] [return, _then]=[return, _then]
^  Exit: (293) [user] read_list(')', (0x55aefe44e2f0), [return, _then])
^  Exit: (292) [user] cont_sexpr(')', (0x55aefe44e2f0), [return, _then])
^  Call: (292) [user] read_list(')', (0x55aefe44e2f0), _157244)
^  Unify: (292) [user] read_list(')', (0x55aefe44e2f0), _157244)
^  Call: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (293) [user] skip_spaces((0x55aefe44e2f0))
   Call: (294) [system] peek_char((0x55aefe44e2f0), _160958)
   Exit: (294) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (294) [system] ' '=(;)
^  Redo: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (294) [user] is_like_space(' ')
^  Unify: (294) [user] is_like_space(' ')
   Call: (295) [system] char_type(' ', 'white')
   Exit: (295) [system] char_type(' ', 'white')
^  Exit: (294) [user] is_like_space(' ')
   Call: (294) [system] get_char((0x55aefe44e2f0), _169616)
   Exit: (294) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (294) [user] skip_spaces((0x55aefe44e2f0))
   Call: (295) [system] peek_char((0x55aefe44e2f0), _173244)
   Exit: (295) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (295) [system] '('=(;)
^  Redo: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (295) [user] is_like_space('(')
^  Unify: (295) [user] is_like_space('(')
   Call: (296) [system] char_type('(', 'white')
^  Redo: (295) [user] is_like_space('(')
^  Unify: (295) [user] is_like_space('(')
   Call: (296) [system] char_type('(', end_of_line)
^  Redo: (295) [user] is_like_space('(')
^  Unify: (295) [user] is_like_space('(')
   Call: (296) [system] char_type('(', space)
^  Redo: (295) [user] is_like_space('(')
^  Unify: (295) [user] is_like_space('(')
   Call: (296) [system] char_type('(', cntrl)
^  Redo: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (293) [user] skip_spaces((0x55aefe44e2f0))
   Call: (293) [system] peek_char((0x55aefe44e2f0), _190952)
   Exit: (293) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (293) [system] '('=')'
^  Redo: (292) [user] read_list(')', (0x55aefe44e2f0), _157244)
   Call: (293) [system] '('=end_of_file
^  Redo: (292) [user] read_list(')', (0x55aefe44e2f0), _157244)
^  Call: (293) [user] cont_sexpr(')', (0x55aefe44e2f0), _196530)
^  Unify: (293) [user] cont_sexpr(')', (0x55aefe44e2f0), _196530)
^  Call: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (294) [user] skip_spaces((0x55aefe44e2f0))
   Call: (295) [system] peek_char((0x55aefe44e2f0), _200244)
   Exit: (295) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (295) [system] '('=(;)
^  Redo: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (295) [user] is_like_space('(')
^  Unify: (295) [user] is_like_space('(')
   Call: (296) [system] char_type('(', 'white')
^  Redo: (295) [user] is_like_space('(')
^  Unify: (295) [user] is_like_space('(')
   Call: (296) [system] char_type('(', end_of_line)
^  Redo: (295) [user] is_like_space('(')
^  Unify: (295) [user] is_like_space('(')
   Call: (296) [system] char_type('(', space)
^  Redo: (295) [user] is_like_space('(')
^  Unify: (295) [user] is_like_space('(')
   Call: (296) [system] char_type('(', cntrl)
^  Redo: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (294) [user] skip_spaces((0x55aefe44e2f0))
   Call: (294) [system] get_char((0x55aefe44e2f0), _217028)
   Exit: (294) [system] get_char((0x55aefe44e2f0), '(')
   Call: (294) [system] '('='('
   Exit: (294) [system] '('='('
^  Call: (294) [user] read_list(')', (0x55aefe44e2f0), _196530)
^  Unify: (294) [user] read_list(')', (0x55aefe44e2f0), _196530)
^  Call: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (295) [user] skip_spaces((0x55aefe44e2f0))
   Call: (296) [system] peek_char((0x55aefe44e2f0), _224454)
   Exit: (296) [system] peek_char((0x55aefe44e2f0), r)
   Call: (296) [system] r=(;)
^  Redo: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (296) [user] is_like_space(r)
^  Unify: (296) [user] is_like_space(r)
   Call: (297) [system] char_type(r, 'white')
^  Redo: (296) [user] is_like_space(r)
^  Unify: (296) [user] is_like_space(r)
   Call: (297) [system] char_type(r, end_of_line)
^  Redo: (296) [user] is_like_space(r)
^  Unify: (296) [user] is_like_space(r)
   Call: (297) [system] char_type(r, space)
^  Redo: (296) [user] is_like_space(r)
^  Unify: (296) [user] is_like_space(r)
   Call: (297) [system] char_type(r, cntrl)
^  Redo: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (295) [user] skip_spaces((0x55aefe44e2f0))
   Call: (295) [system] peek_char((0x55aefe44e2f0), _241238)
   Exit: (295) [system] peek_char((0x55aefe44e2f0), r)
   Call: (295) [system] r=')'
^  Redo: (294) [user] read_list(')', (0x55aefe44e2f0), _196530)
   Call: (295) [system] r=end_of_file
^  Redo: (294) [user] read_list(')', (0x55aefe44e2f0), _196530)
^  Call: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), _246816)
^  Unify: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), _246816)
^  Call: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (296) [user] skip_spaces((0x55aefe44e2f0))
   Call: (297) [system] peek_char((0x55aefe44e2f0), _250530)
   Exit: (297) [system] peek_char((0x55aefe44e2f0), r)
   Call: (297) [system] r=(;)
^  Redo: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (297) [user] is_like_space(r)
^  Unify: (297) [user] is_like_space(r)
   Call: (298) [system] char_type(r, 'white')
^  Redo: (297) [user] is_like_space(r)
^  Unify: (297) [user] is_like_space(r)
   Call: (298) [system] char_type(r, end_of_line)
^  Redo: (297) [user] is_like_space(r)
^  Unify: (297) [user] is_like_space(r)
   Call: (298) [system] char_type(r, space)
^  Redo: (297) [user] is_like_space(r)
^  Unify: (297) [user] is_like_space(r)
   Call: (298) [system] char_type(r, cntrl)
^  Redo: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (296) [user] skip_spaces((0x55aefe44e2f0))
   Call: (296) [system] get_char((0x55aefe44e2f0), _267314)
   Exit: (296) [system] get_char((0x55aefe44e2f0), r)
   Call: (296) [system] r='('
^  Redo: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), _246816)
   Call: (296) [system] r='['
^  Redo: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), _246816)
   Call: (296) [system] r='{'
^  Redo: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), _246816)
   Call: (296) [system] r='"'
^  Redo: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), _246816)
   Call: (296) [system] r=!
^  Redo: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), _246816)
   Call: (296) [system] r='\''
^  Redo: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), _246816)
   Call: (296) [system] r='`'
^  Redo: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), _246816)
   Call: (296) [system] r=end_of_file
^  Redo: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), _246816)
^  Call: (296) [user] read_symbolic(')', (0x55aefe44e2f0), r, _246816)
^  Unify: (296) [user] read_symbolic(')', (0x55aefe44e2f0), r, _246816)
^  Call: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _285924)
^  Unify: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _285924)
   Call: (298) [system] peek_char((0x55aefe44e2f0), _287790)
   Exit: (298) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (298) [user] is_delimiter(e)
^  Unify: (298) [user] is_delimiter(e)
   Call: (299) [system] char_type(e, space)
^  Redo: (298) [user] is_delimiter(e)
   Call: (299) [system] arg(_293430, v('(', ')', end_of_file), e)
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _285924)
   Call: (298) [system] ')'==e
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _285924)
   Call: (298) [system] get_char((0x55aefe44e2f0), e)
   Exit: (298) [system] get_char((0x55aefe44e2f0), e)
   Call: (298) [system] e=(\)
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _285924)
^  Call: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _300796)
^  Unify: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _300796)
   Call: (299) [system] peek_char((0x55aefe44e2f0), _302662)
   Exit: (299) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (299) [user] is_delimiter(t)
^  Unify: (299) [user] is_delimiter(t)
   Call: (300) [system] char_type(t, space)
^  Redo: (299) [user] is_delimiter(t)
   Call: (300) [system] arg(_308302, v('(', ')', end_of_file), t)
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _300796)
   Call: (299) [system] ')'==t
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _300796)
   Call: (299) [system] get_char((0x55aefe44e2f0), t)
   Exit: (299) [system] get_char((0x55aefe44e2f0), t)
   Call: (299) [system] t=(\)
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _300796)
^  Call: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _315668)
^  Unify: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _315668)
   Call: (300) [system] peek_char((0x55aefe44e2f0), _317534)
   Exit: (300) [system] peek_char((0x55aefe44e2f0), u)
^  Call: (300) [user] is_delimiter(u)
^  Unify: (300) [user] is_delimiter(u)
   Call: (301) [system] char_type(u, space)
^  Redo: (300) [user] is_delimiter(u)
   Call: (301) [system] arg(_323174, v('(', ')', end_of_file), u)
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _315668)
   Call: (300) [system] ')'==u
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _315668)
   Call: (300) [system] get_char((0x55aefe44e2f0), u)
   Exit: (300) [system] get_char((0x55aefe44e2f0), u)
   Call: (300) [system] u=(\)
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _315668)
^  Call: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _330540)
^  Unify: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _330540)
   Call: (301) [system] peek_char((0x55aefe44e2f0), _332406)
   Exit: (301) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (301) [user] is_delimiter(r)
^  Unify: (301) [user] is_delimiter(r)
   Call: (302) [system] char_type(r, space)
^  Redo: (301) [user] is_delimiter(r)
   Call: (302) [system] arg(_338046, v('(', ')', end_of_file), r)
^  Redo: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _330540)
   Call: (301) [system] ')'==r
^  Redo: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _330540)
   Call: (301) [system] get_char((0x55aefe44e2f0), r)
   Exit: (301) [system] get_char((0x55aefe44e2f0), r)
   Call: (301) [system] r=(\)
^  Redo: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _330540)
^  Call: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _345412)
^  Unify: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _345412)
   Call: (302) [system] peek_char((0x55aefe44e2f0), _347278)
   Exit: (302) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (302) [user] is_delimiter(n)
^  Unify: (302) [user] is_delimiter(n)
   Call: (303) [system] char_type(n, space)
^  Redo: (302) [user] is_delimiter(n)
   Call: (303) [system] arg(_352918, v('(', ')', end_of_file), n)
^  Redo: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _345412)
   Call: (302) [system] ')'==n
^  Redo: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _345412)
   Call: (302) [system] get_char((0x55aefe44e2f0), n)
   Exit: (302) [system] get_char((0x55aefe44e2f0), n)
   Call: (302) [system] n=(\)
^  Redo: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _345412)
^  Call: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _360284)
^  Unify: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _360284)
   Call: (303) [system] peek_char((0x55aefe44e2f0), _362150)
   Exit: (303) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (303) [user] is_delimiter(' ')
^  Unify: (303) [user] is_delimiter(' ')
   Call: (304) [system] char_type(' ', space)
   Exit: (304) [system] char_type(' ', space)
^  Exit: (303) [user] is_delimiter(' ')
   Call: (303) [system] _360284=[]
   Exit: (303) [system] []=[]
^  Exit: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (302) [system] _345412=[n]
   Exit: (302) [system] [n]=[n]
^  Exit: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (301) [system] _330540=[r, n]
   Exit: (301) [system] [r, n]=[r, n]
^  Exit: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, n])
   Call: (300) [system] _315668=[u, r, n]
   Exit: (300) [system] [u, r, n]=[u, r, n]
^  Exit: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [u, r, n])
   Call: (299) [system] _300796=[t, u, r, n]
   Exit: (299) [system] [t, u, r, n]=[t, u, r, n]
^  Exit: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, u, r, n])
   Call: (298) [system] _285924=[e, t, u, r, n]
   Exit: (298) [system] [e, t, u, r, n]=[e, t, u, r, n]
^  Exit: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, t, u, r, n])
^  Call: (297) [user] classify_and_convert_charseq(r, [e, t, u, r, n], _246816)
^  Unify: (297) [user] classify_and_convert_charseq(r, [e, t, u, r, n], _246816)
^  Call: (299) [system] setup_call_cleanup('$notrace'(_387286, _387288), once(user:catch(read_from_chars([r, e, t, u, r, n], _246816), _387262, fail)), '$restore_trace'(_387286, _387288))
^  Unify: (299) [system] setup_call_cleanup(system:'$notrace'(_387286, _387288), system:once(user:catch(read_from_chars([r, e, t, u, r, n], _246816), _387262, fail)), system:'$restore_trace'(_387286, _387288))
^  Call: (300) [system] sig_atomic(system:'$notrace'(_387286, _387288))
^  Exit: (299) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([r, e, t, u, r, n], return), _387262, fail)), system:'$restore_trace'(3, -1))
   Call: (298) [system] atomic(return)
   Exit: (298) [system] atomic(return)
^  Exit: (297) [user] classify_and_convert_charseq(r, [e, t, u, r, n], return)
^  Exit: (296) [user] read_symbolic(')', (0x55aefe44e2f0), r, return)
^  Exit: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), return)
^  Call: (295) [user] read_list(')', (0x55aefe44e2f0), _395724)
^  Unify: (295) [user] read_list(')', (0x55aefe44e2f0), _395724)
^  Call: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (296) [user] skip_spaces((0x55aefe44e2f0))
   Call: (297) [system] peek_char((0x55aefe44e2f0), _399438)
   Exit: (297) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (297) [system] ' '=(;)
^  Redo: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (297) [user] is_like_space(' ')
^  Unify: (297) [user] is_like_space(' ')
   Call: (298) [system] char_type(' ', 'white')
   Exit: (298) [system] char_type(' ', 'white')
^  Exit: (297) [user] is_like_space(' ')
   Call: (297) [system] get_char((0x55aefe44e2f0), _408096)
   Exit: (297) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (297) [user] skip_spaces((0x55aefe44e2f0))
   Call: (298) [system] peek_char((0x55aefe44e2f0), _411724)
   Exit: (298) [system] peek_char((0x55aefe44e2f0), $)
   Call: (298) [system] ($)=(;)
^  Redo: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (298) [user] is_like_space($)
^  Unify: (298) [user] is_like_space($)
   Call: (299) [system] char_type($, 'white')
^  Redo: (298) [user] is_like_space($)
^  Unify: (298) [user] is_like_space($)
   Call: (299) [system] char_type($, end_of_line)
^  Redo: (298) [user] is_like_space($)
^  Unify: (298) [user] is_like_space($)
   Call: (299) [system] char_type($, space)
^  Redo: (298) [user] is_like_space($)
^  Unify: (298) [user] is_like_space($)
   Call: (299) [system] char_type($, cntrl)
^  Redo: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (296) [user] skip_spaces((0x55aefe44e2f0))
   Call: (296) [system] peek_char((0x55aefe44e2f0), _429432)
   Exit: (296) [system] peek_char((0x55aefe44e2f0), $)
   Call: (296) [system] ($)=')'
^  Redo: (295) [user] read_list(')', (0x55aefe44e2f0), _395724)
   Call: (296) [system] ($)=end_of_file
^  Redo: (295) [user] read_list(')', (0x55aefe44e2f0), _395724)
^  Call: (296) [user] cont_sexpr(')', (0x55aefe44e2f0), _435010)
^  Unify: (296) [user] cont_sexpr(')', (0x55aefe44e2f0), _435010)
^  Call: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (297) [user] skip_spaces((0x55aefe44e2f0))
   Call: (298) [system] peek_char((0x55aefe44e2f0), _438724)
   Exit: (298) [system] peek_char((0x55aefe44e2f0), $)
   Call: (298) [system] ($)=(;)
^  Redo: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (298) [user] is_like_space($)
^  Unify: (298) [user] is_like_space($)
   Call: (299) [system] char_type($, 'white')
^  Redo: (298) [user] is_like_space($)
^  Unify: (298) [user] is_like_space($)
   Call: (299) [system] char_type($, end_of_line)
^  Redo: (298) [user] is_like_space($)
^  Unify: (298) [user] is_like_space($)
   Call: (299) [system] char_type($, space)
^  Redo: (298) [user] is_like_space($)
^  Unify: (298) [user] is_like_space($)
   Call: (299) [system] char_type($, cntrl)
^  Redo: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (297) [user] skip_spaces((0x55aefe44e2f0))
   Call: (297) [system] get_char((0x55aefe44e2f0), _455508)
   Exit: (297) [system] get_char((0x55aefe44e2f0), $)
   Call: (297) [system] ($)='('
^  Redo: (296) [user] cont_sexpr(')', (0x55aefe44e2f0), _435010)
   Call: (297) [system] ($)='['
^  Redo: (296) [user] cont_sexpr(')', (0x55aefe44e2f0), _435010)
   Call: (297) [system] ($)='{'
^  Redo: (296) [user] cont_sexpr(')', (0x55aefe44e2f0), _435010)
   Call: (297) [system] ($)='"'
^  Redo: (296) [user] cont_sexpr(')', (0x55aefe44e2f0), _435010)
   Call: (297) [system] ($)=!
^  Redo: (296) [user] cont_sexpr(')', (0x55aefe44e2f0), _435010)
   Call: (297) [system] ($)='\''
^  Redo: (296) [user] cont_sexpr(')', (0x55aefe44e2f0), _435010)
   Call: (297) [system] ($)='`'
^  Redo: (296) [user] cont_sexpr(')', (0x55aefe44e2f0), _435010)
   Call: (297) [system] ($)=end_of_file
^  Redo: (296) [user] cont_sexpr(')', (0x55aefe44e2f0), _435010)
^  Call: (297) [user] read_symbolic(')', (0x55aefe44e2f0), $, _435010)
^  Unify: (297) [user] read_symbolic(')', (0x55aefe44e2f0), $, _435010)
^  Call: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _474118)
^  Unify: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _474118)
   Call: (299) [system] peek_char((0x55aefe44e2f0), _475984)
   Exit: (299) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (299) [user] is_delimiter(e)
^  Unify: (299) [user] is_delimiter(e)
   Call: (300) [system] char_type(e, space)
^  Redo: (299) [user] is_delimiter(e)
   Call: (300) [system] arg(_481624, v('(', ')', end_of_file), e)
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _474118)
   Call: (299) [system] ')'==e
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _474118)
   Call: (299) [system] get_char((0x55aefe44e2f0), e)
   Exit: (299) [system] get_char((0x55aefe44e2f0), e)
   Call: (299) [system] e=(\)
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _474118)
^  Call: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _488990)
^  Unify: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _488990)
   Call: (300) [system] peek_char((0x55aefe44e2f0), _490856)
   Exit: (300) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (300) [user] is_delimiter(l)
^  Unify: (300) [user] is_delimiter(l)
   Call: (301) [system] char_type(l, space)
^  Redo: (300) [user] is_delimiter(l)
   Call: (301) [system] arg(_496496, v('(', ')', end_of_file), l)
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _488990)
   Call: (300) [system] ')'==l
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _488990)
   Call: (300) [system] get_char((0x55aefe44e2f0), l)
   Exit: (300) [system] get_char((0x55aefe44e2f0), l)
   Call: (300) [system] l=(\)
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _488990)
^  Call: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _503862)
^  Unify: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _503862)
   Call: (301) [system] peek_char((0x55aefe44e2f0), _505728)
   Exit: (301) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (301) [user] is_delimiter(s)
^  Unify: (301) [user] is_delimiter(s)
   Call: (302) [system] char_type(s, space)
^  Redo: (301) [user] is_delimiter(s)
   Call: (302) [system] arg(_511368, v('(', ')', end_of_file), s)
^  Redo: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _503862)
   Call: (301) [system] ')'==s
^  Redo: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _503862)
   Call: (301) [system] get_char((0x55aefe44e2f0), s)
   Exit: (301) [system] get_char((0x55aefe44e2f0), s)
   Call: (301) [system] s=(\)
^  Redo: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _503862)
^  Call: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _518734)
^  Unify: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _518734)
   Call: (302) [system] peek_char((0x55aefe44e2f0), _520600)
   Exit: (302) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (302) [user] is_delimiter(e)
^  Unify: (302) [user] is_delimiter(e)
   Call: (303) [system] char_type(e, space)
^  Redo: (302) [user] is_delimiter(e)
   Call: (303) [system] arg(_8554, v('(', ')', end_of_file), e)
^  Redo: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6264)
   Call: (302) [system] ')'==e
^  Redo: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6264)
   Call: (302) [system] get_char((0x55aefe44e2f0), e)
   Exit: (302) [system] get_char((0x55aefe44e2f0), e)
   Call: (302) [system] e=(\)
^  Redo: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6264)
^  Call: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _15920)
^  Unify: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _15920)
   Call: (303) [system] peek_char((0x55aefe44e2f0), _17786)
   Exit: (303) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (303) [user] is_delimiter(')')
^  Unify: (303) [user] is_delimiter(')')
   Call: (304) [system] char_type(')', space)
^  Redo: (303) [user] is_delimiter(')')
   Call: (304) [system] arg(_23426, v('(', ')', end_of_file), ')')
   Exit: (304) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (303) [user] is_delimiter(')')
   Call: (303) [system] _15920=[]
   Exit: (303) [system] []=[]
^  Exit: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (302) [system] _6264=[e]
   Exit: (302) [system] [e]=[e]
^  Exit: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e])
   Call: (301) [system] _6260=[s, e]
   Exit: (301) [system] [s, e]=[s, e]
^  Exit: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, e])
   Call: (300) [system] _6256=[l, s, e]
   Exit: (300) [system] [l, s, e]=[l, s, e]
^  Exit: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l, s, e])
   Call: (299) [system] _6252=[e, l, s, e]
   Exit: (299) [system] [e, l, s, e]=[e, l, s, e]
^  Exit: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, l, s, e])
^  Call: (298) [user] classify_and_convert_charseq($, [e, l, s, e], _6248)
^  Unify: (298) [user] classify_and_convert_charseq($, [e, l, s, e], '$VAR'(_41038))
   Call: (299) [system] atom_chars(_41038, ['_', e, l, s, e])
   Exit: (299) [system] atom_chars('_else', ['_', e, l, s, e])
^  Exit: (298) [user] classify_and_convert_charseq($, [e, l, s, e], _else)
^  Exit: (297) [user] read_symbolic(')', (0x55aefe44e2f0), $, _else)
^  Exit: (296) [user] cont_sexpr(')', (0x55aefe44e2f0), _else)
^  Call: (296) [user] read_list(')', (0x55aefe44e2f0), _46634)
^  Unify: (296) [user] read_list(')', (0x55aefe44e2f0), _46634)
^  Call: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (297) [user] skip_spaces((0x55aefe44e2f0))
   Call: (298) [system] peek_char((0x55aefe44e2f0), _50348)
   Exit: (298) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (298) [system] ')'=(;)
^  Redo: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (298) [user] is_like_space(')')
^  Unify: (298) [user] is_like_space(')')
   Call: (299) [system] char_type(')', 'white')
^  Redo: (298) [user] is_like_space(')')
^  Unify: (298) [user] is_like_space(')')
   Call: (299) [system] char_type(')', end_of_line)
^  Redo: (298) [user] is_like_space(')')
^  Unify: (298) [user] is_like_space(')')
   Call: (299) [system] char_type(')', space)
^  Redo: (298) [user] is_like_space(')')
^  Unify: (298) [user] is_like_space(')')
   Call: (299) [system] char_type(')', cntrl)
^  Redo: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (297) [user] skip_spaces((0x55aefe44e2f0))
   Call: (297) [system] peek_char((0x55aefe44e2f0), _67132)
   Exit: (297) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (297) [system] ')'=')'
   Exit: (297) [system] ')'=')'
   Call: (297) [system] get_char((0x55aefe44e2f0), _70922)
   Exit: (297) [system] get_char((0x55aefe44e2f0), ')')
   Call: (297) [system] _46634=[]
   Exit: (297) [system] []=[]
^  Exit: (296) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (296) [system] _6244=[_else]
   Exit: (296) [system] [_else]=[_else]
^  Exit: (295) [user] read_list(')', (0x55aefe44e2f0), [_else])
   Call: (295) [system] _6236=[return, _else]
   Exit: (295) [system] [return, _else]=[return, _else]
^  Exit: (294) [user] read_list(')', (0x55aefe44e2f0), [return, _else])
^  Exit: (293) [user] cont_sexpr(')', (0x55aefe44e2f0), [return, _else])
^  Call: (293) [user] read_list(')', (0x55aefe44e2f0), _82010)
^  Unify: (293) [user] read_list(')', (0x55aefe44e2f0), _82010)
^  Call: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (294) [user] skip_spaces((0x55aefe44e2f0))
   Call: (295) [system] peek_char((0x55aefe44e2f0), _85724)
   Exit: (295) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (295) [system] ')'=(;)
^  Redo: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (295) [user] is_like_space(')')
^  Unify: (295) [user] is_like_space(')')
   Call: (296) [system] char_type(')', 'white')
^  Redo: (295) [user] is_like_space(')')
^  Unify: (295) [user] is_like_space(')')
   Call: (296) [system] char_type(')', end_of_line)
^  Redo: (295) [user] is_like_space(')')
^  Unify: (295) [user] is_like_space(')')
   Call: (296) [system] char_type(')', space)
^  Redo: (295) [user] is_like_space(')')
^  Unify: (295) [user] is_like_space(')')
   Call: (296) [system] char_type(')', cntrl)
^  Redo: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (294) [user] skip_spaces((0x55aefe44e2f0))
   Call: (294) [system] peek_char((0x55aefe44e2f0), _102508)
   Exit: (294) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (294) [system] ')'=')'
   Exit: (294) [system] ')'=')'
   Call: (294) [system] get_char((0x55aefe44e2f0), _106298)
   Exit: (294) [system] get_char((0x55aefe44e2f0), ')')
   Call: (294) [system] _82010=[]
   Exit: (294) [system] []=[]
^  Exit: (293) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (293) [system] _6232=[[return, _else]]
   Exit: (293) [system] [[return, _else]]=[[return, _else]]
^  Exit: (292) [user] read_list(')', (0x55aefe44e2f0), [[return, _else]])
   Call: (292) [system] _6210=[[return, _then], [return, _else]]
   Exit: (292) [system] [[return, _then], [return, _else]]=[[return, _then], [return, _else]]
^  Exit: (291) [user] read_list(')', (0x55aefe44e2f0), [[return, _then], [return, _else]])
   Call: (291) [system] _6184=[[_head, _tail], [return, _then], [return, _else]]
   Exit: (291) [system] [[_head, _tail], [return, _then], [return, _else]]=[[_head, _tail], [return, _then], [return, _else]]
^  Exit: (290) [user] read_list(')', (0x55aefe44e2f0), [[_head, _tail], [return, _then], [return, _else]])
   Call: (290) [system] _6174=[_list, [_head, _tail], [return, _then], [return, _else]]
   Exit: (290) [system] [_list, [_head, _tail], [return, _then], [return, _else]]=[_list, [_head, _tail], [return, _then], [return, _else]]
^  Exit: (289) [user] read_list(')', (0x55aefe44e2f0), [_list, [_head, _tail], [return, _then], [return, _else]])
   Call: (289) [system] _6166=[unify, _list, [_head, _tail], [return, _then], [return, _else]]
   Exit: (289) [system] [unify, _list, [_head, _tail], [return, _then], [return, _else]]=[unify, _list, [_head, _tail], [return, _then], [return, _else]]
^  Exit: (288) [user] read_list(')', (0x55aefe44e2f0), [unify, _list, [_head, _tail], [return, _then], [return, _else]])
^  Exit: (287) [user] cont_sexpr(')', (0x55aefe44e2f0), [unify, _list, [_head, _tail], [return, _then], [return, _else]])
^  Call: (287) [user] read_list(')', (0x55aefe44e2f0), _125768)
^  Unify: (287) [user] read_list(')', (0x55aefe44e2f0), _125768)
^  Call: (288) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (288) [user] skip_spaces((0x55aefe44e2f0))
   Call: (289) [system] peek_char((0x55aefe44e2f0), _129482)
   Exit: (289) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (289) [system] ' '=(;)
^  Redo: (288) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (289) [user] is_like_space(' ')
^  Unify: (289) [user] is_like_space(' ')
   Call: (290) [system] char_type(' ', 'white')
   Exit: (290) [system] char_type(' ', 'white')
^  Exit: (289) [user] is_like_space(' ')
   Call: (289) [system] get_char((0x55aefe44e2f0), _138140)
   Exit: (289) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (289) [user] skip_spaces((0x55aefe44e2f0))
   Call: (290) [system] peek_char((0x55aefe44e2f0), _141768)
   Exit: (290) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (290) [system] ')'=(;)
^  Redo: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (290) [user] is_like_space(')')
^  Unify: (290) [user] is_like_space(')')
   Call: (291) [system] char_type(')', 'white')
^  Redo: (290) [user] is_like_space(')')
^  Unify: (290) [user] is_like_space(')')
   Call: (291) [system] char_type(')', end_of_line)
^  Redo: (290) [user] is_like_space(')')
^  Unify: (290) [user] is_like_space(')')
   Call: (291) [system] char_type(')', space)
^  Redo: (290) [user] is_like_space(')')
^  Unify: (290) [user] is_like_space(')')
   Call: (291) [system] char_type(')', cntrl)
^  Redo: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (288) [user] skip_spaces((0x55aefe44e2f0))
   Call: (288) [system] peek_char((0x55aefe44e2f0), _159476)
   Exit: (288) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (288) [system] ')'=')'
   Exit: (288) [system] ')'=')'
   Call: (288) [system] get_char((0x55aefe44e2f0), _163266)
   Exit: (288) [system] get_char((0x55aefe44e2f0), ')')
   Call: (288) [system] _125768=[]
   Exit: (288) [system] []=[]
^  Exit: (287) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (287) [system] _6162=[[unify, _list, [_head, _tail], [return, _then], [return, _else]]]
   Exit: (287) [system] [[unify, _list, [_head, _tail], [return, _then], [return, _else]]]=[[unify, _list, [_head, _tail], [return, _then], [return, _else]]]
^  Exit: (286) [user] read_list(')', (0x55aefe44e2f0), [[unify, _list, [_head, _tail], [return, _then], [return, _else]]])
   Call: (286) [system] _6152=[_list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]
   Exit: (286) [system] [_list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]=[_list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]
^  Exit: (285) [user] read_list(')', (0x55aefe44e2f0), [_list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]])
   Call: (285) [system] _6130=[['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]
   Exit: (285) [system] [['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]=[['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]
^  Exit: (284) [user] read_list(')', (0x55aefe44e2f0), [['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]])
   Call: (284) [system] _6122=[chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]
   Exit: (284) [system] [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]=[chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]
^  Exit: (283) [user] read_list(')', (0x55aefe44e2f0), [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]])
^  Exit: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]])
^  Call: (282) [user] read_list(')', (0x55aefe44e2f0), _179942)
^  Unify: (282) [user] read_list(')', (0x55aefe44e2f0), _179942)
^  Call: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (283) [user] skip_spaces((0x55aefe44e2f0))
   Call: (284) [system] peek_char((0x55aefe44e2f0), _183656)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (284) [system] ')'=(;)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (284) [user] is_like_space(')')
^  Unify: (284) [user] is_like_space(')')
   Call: (285) [system] char_type(')', 'white')
^  Redo: (284) [user] is_like_space(')')
^  Unify: (284) [user] is_like_space(')')
   Call: (285) [system] char_type(')', end_of_line)
^  Redo: (284) [user] is_like_space(')')
^  Unify: (284) [user] is_like_space(')')
   Call: (285) [system] char_type(')', space)
^  Redo: (284) [user] is_like_space(')')
^  Unify: (284) [user] is_like_space(')')
   Call: (285) [system] char_type(')', cntrl)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (283) [user] skip_spaces((0x55aefe44e2f0))
   Call: (283) [system] peek_char((0x55aefe44e2f0), _200440)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (283) [system] ')'=')'
   Exit: (283) [system] ')'=')'
   Call: (283) [system] get_char((0x55aefe44e2f0), _204230)
   Exit: (283) [system] get_char((0x55aefe44e2f0), ')')
   Call: (283) [system] _179942=[]
   Exit: (283) [system] []=[]
^  Exit: (282) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (282) [system] _6118=[[chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]
   Exit: (282) [system] [[chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]=[[chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]
^  Exit: (281) [user] read_list(')', (0x55aefe44e2f0), [[chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]])
   Call: (281) [system] _6096=[[return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]
   Exit: (281) [system] [[return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]=[[return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]
^  Exit: (280) [user] read_list(')', (0x55aefe44e2f0), [[return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]])
   Call: (280) [system] _6090=[[], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]
   Exit: (280) [system] [[], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]=[[], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]
^  Exit: (279) [user] read_list(')', (0x55aefe44e2f0), [[], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]])
   Call: (279) [system] _6080=[_atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]
   Exit: (279) [system] [_atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]=[_atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]
^  Exit: (278) [user] read_list(')', (0x55aefe44e2f0), [_atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]])
   Call: (278) [system] _6072=['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]
   Exit: (278) [system] ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]=['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]
^  Exit: (277) [user] read_list(')', (0x55aefe44e2f0), ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]])
^  Exit: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]])
^  Call: (276) [user] read_list(')', (0x55aefe44e2f0), _223700)
^  Unify: (276) [user] read_list(')', (0x55aefe44e2f0), _223700)
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _227414)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (278) [system] ')'=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space(')')
^  Unify: (278) [user] is_like_space(')')
   Call: (279) [system] char_type(')', 'white')
^  Redo: (278) [user] is_like_space(')')
^  Unify: (278) [user] is_like_space(')')
   Call: (279) [system] char_type(')', end_of_line)
^  Redo: (278) [user] is_like_space(')')
^  Unify: (278) [user] is_like_space(')')
   Call: (279) [system] char_type(')', space)
^  Redo: (278) [user] is_like_space(')')
^  Unify: (278) [user] is_like_space(')')
   Call: (279) [system] char_type(')', cntrl)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _244198)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (277) [system] ')'=')'
   Exit: (277) [system] ')'=')'
   Call: (277) [system] get_char((0x55aefe44e2f0), _247988)
   Exit: (277) [system] get_char((0x55aefe44e2f0), ')')
   Call: (277) [system] _223700=[]
   Exit: (277) [system] []=[]
^  Exit: (276) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (276) [system] _6068=[['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]
   Exit: (276) [system] [['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]=[['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]
^  Exit: (275) [user] read_list(')', (0x55aefe44e2f0), [['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]])
   Call: (275) [system] _6060=[eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]
   Exit: (275) [system] [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]=[eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]
^  Exit: (274) [user] read_list(')', (0x55aefe44e2f0), [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]])
^  Exit: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]])
^  Call: (273) [user] read_list(')', (0x55aefe44e2f0), _259076)
^  Unify: (273) [user] read_list(')', (0x55aefe44e2f0), _259076)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _262790)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (275) [system] ')'=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(')')
^  Unify: (275) [user] is_like_space(')')
   Call: (276) [system] char_type(')', 'white')
^  Redo: (275) [user] is_like_space(')')
^  Unify: (275) [user] is_like_space(')')
   Call: (276) [system] char_type(')', end_of_line)
^  Redo: (275) [user] is_like_space(')')
^  Unify: (275) [user] is_like_space(')')
   Call: (276) [system] char_type(')', space)
^  Redo: (275) [user] is_like_space(')')
^  Unify: (275) [user] is_like_space(')')
   Call: (276) [system] char_type(')', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _279574)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (274) [system] ')'=')'
   Exit: (274) [system] ')'=')'
   Call: (274) [system] get_char((0x55aefe44e2f0), _283364)
   Exit: (274) [system] get_char((0x55aefe44e2f0), ')')
   Call: (274) [system] _259076=[]
   Exit: (274) [system] []=[]
^  Exit: (273) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (273) [system] _6056=[[eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]
   Exit: (273) [system] [[eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]=[[eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), [[eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]])
   Call: (272) [system] _6048=[function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]
   Exit: (272) [system] [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]=[function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]])
^  Exit: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]])
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _294452)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _294452)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _298166)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (272) [system] ')'=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', 'white')
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', end_of_line)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', space)
^  Redo: (272) [user] is_like_space(')')
^  Unify: (272) [user] is_like_space(')')
   Call: (273) [system] char_type(')', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _314950)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (271) [system] ')'=')'
   Exit: (271) [system] ')'=')'
   Call: (271) [system] get_char((0x55aefe44e2f0), _318740)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ')')
   Call: (271) [system] _294452=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (270) [system] _6044=[[function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]
   Exit: (270) [system] [[function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]=[[function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]
^  Exit: (269) [user] read_list(')', (0x55aefe44e2f0), [[function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
   Call: (269) [system] _5982=[['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]
   Exit: (269) [system] [['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]=[['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]
^  Exit: (268) [user] read_list(')', (0x55aefe44e2f0), [['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
   Call: (268) [system] _5942=[=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]
   Exit: (268) [system] [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]=[=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]
^  Exit: (267) [user] read_list(')', (0x55aefe44e2f0), [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Exit: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Exit: (265) [user] read_sexpr((0x55aefe44e2f0), [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Call: (265) [user] assertz(metta_file_comment(28, 0, 820, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], '$stream_position'(820, 28, 0, 820)))
^  Exit: (265) [user] assertz(metta_file_comment(28, 0, 820, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], '$stream_position'(820, 28, 0, 820)))
^  Exit: (263) [system] once(user:(read_position((0x55aefe44e2f0), 28, 0, 820, '$stream_position'(820, 28, 0, 820)), read_sexpr((0x55aefe44e2f0), [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]), assertz(metta_file_comment(28, 0, 820, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], '$stream_position'(820, 28, 0, 820)))))
   Call: (263) [system] fail
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Call: (263) [user] retract(metta_file_comment(_339114, _339116, _339118, _339120, _339122))
^  Exit: (263) [user] retract(metta_file_comment(28, 0, 820, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], '$stream_position'(820, 28, 0, 820)))
^  Call: (263) [user] trly(untyped_to_metta, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _5908)
^  Call: (264) [user] once(call(untyped_to_metta, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _343142))
^  Unify: (264) [system] once(user:call(untyped_to_metta, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _343142))
^  Call: (265) [user] call(untyped_to_metta, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _343142)
^  Unify: (265) [system] call(user:untyped_to_metta, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _343142)
^  Call: (266) [user] untyped_to_metta([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _343142)
^  Unify: (266) [user] untyped_to_metta([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _343142)
^  Call: (267) [user] must_det_ll(trly(mfix_vars1, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _348754))
^  Unify: (267) [user] must_det_ll(user:trly(mfix_vars1, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _348754))
^  Call: (268) [user] once(user:trly(mfix_vars1, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _348754))
^  Unify: (268) [system] once(user:trly(mfix_vars1, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _348754))
^  Call: (269) [user] trly(mfix_vars1, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _348754)
^  Unify: (269) [user] trly(mfix_vars1, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _348754)
^  Call: (270) [user] once(call(mfix_vars1, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340))
^  Unify: (270) [system] once(user:call(mfix_vars1, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340))
^  Call: (271) [user] call(mfix_vars1, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340)
^  Unify: (271) [system] call(user:mfix_vars1, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340)
^  Call: (272) [user] mfix_vars1([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340)
^  Unify: (272) [user] mfix_vars1([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340)
   Call: (273) [system] var([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Redo: (272) [user] mfix_vars1([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340)
^  Unify: (272) [user] mfix_vars1([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], '$VAR'(_361800))
   Call: (273) [system] atom([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Redo: (272) [user] mfix_vars1([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340)
^  Unify: (272) [user] mfix_vars1([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340)
   Call: (273) [system] [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]==true
^  Redo: (272) [user] mfix_vars1([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340)
^  Unify: (272) [user] mfix_vars1([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340)
   Call: (273) [system] [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]==false
^  Redo: (272) [user] mfix_vars1([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340)
^  Unify: (272) [user] mfix_vars1([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340)
   Call: (273) [system] (=)=='['
^  Redo: (272) [user] mfix_vars1([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340)
^  Unify: (272) [user] mfix_vars1([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340)
   Call: (273) [system] (=)=='{'
^  Redo: (272) [user] mfix_vars1([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340)
^  Unify: (272) [user] mfix_vars1([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340)
   Call: (273) [system] is_list([['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
   Exit: (273) [system] is_list([['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
   Call: (273) [lists] lists:last([['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _378494)
   Unify: (273) [lists] lists:last([['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _378494)
   Call: (274) [lists] lists:last_([[function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], ['if-decons-expr', _atom, _head, _tail, _then, _else], _378494)
   Unify: (274) [lists] lists:last_([[function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], ['if-decons-expr', _atom, _head, _tail, _then, _else], _378494)
   Call: (275) [lists] lists:last_([], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]], _378494)
   Unify: (275) [lists] lists:last_([], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]])
   Exit: (275) [lists] lists:last_([], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]])
   Exit: (274) [lists] lists:last_([[function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]])
   Exit: (273) [lists] lists:last([['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]])
   Call: (273) [system] [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]=='}'
^  Redo: (272) [user] mfix_vars1([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340)
^  Unify: (272) [user] mfix_vars1([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340)
   Call: (273) [system] [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]==[_389658, _389664]
^  Redo: (272) [user] mfix_vars1([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340)
^  Unify: (272) [user] mfix_vars1([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340)
   Call: (273) [system] fail
^  Redo: (272) [user] mfix_vars1([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340)
^  Unify: (272) [user] mfix_vars1([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340)
   Call: (273) [system] is_list([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
   Exit: (273) [system] is_list([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Call: (273) [user] apply:maplist(mfix_vars1, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340)
^  Unify: (273) [apply] apply:maplist(user:mfix_vars1, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340)
   Call: (274) [apply] apply:maplist_([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _354340, user:mfix_vars1)
   Unify: (274) [apply] apply:maplist_([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [_399888|_399890], user:mfix_vars1)
^  Call: (275) [user] mfix_vars1(=, _399888)
^  Unify: (275) [user] mfix_vars1(=, _399888)
   Call: (276) [system] var(=)
^  Redo: (275) [user] mfix_vars1(=, _399888)
^  Unify: (275) [user] mfix_vars1(=, '$VAR'(_404534))
   Call: (276) [system] atom(=)
   Exit: (276) [system] atom(=)
^  Call: (276) [user] symbol_concat($, _407312, =)
^  Unify: (276) [user] symbol_concat($, _407312, =)
   Call: (277) [system] atom_concat($, _407312, =)
   Fail: (277) [system] atom_concat($, _407312, =)
^  Fail: (276) [user] symbol_concat($, _407312, =)
^  Redo: (275) [user] mfix_vars1(=, _399888)
^  Unify: (275) [user] mfix_vars1(=, _399888)
   Call: (276) [system] (=)==true
^  Redo: (275) [user] mfix_vars1(=, _399888)
^  Unify: (275) [user] mfix_vars1(=, _399888)
   Call: (276) [system] (=)==false
^  Redo: (275) [user] mfix_vars1(=, _399888)
^  Unify: (275) [user] mfix_vars1(=, _399888)
   Call: (276) [system] (=)==[_419400, _419406]
^  Redo: (275) [user] mfix_vars1(=, _399888)
^  Unify: (275) [user] mfix_vars1(=, _399888)
   Call: (276) [system] is_list(=)
^  Redo: (275) [user] mfix_vars1(=, _399888)
^  Unify: (275) [user] mfix_vars1(=, _399888)
   Call: (276) [system] string(=)
^  Redo: (275) [user] mfix_vars1(=, _399888)
^  Unify: (275) [user] mfix_vars1(=, _399888)
   Call: (276) [system] compound(=)
^  Redo: (275) [user] mfix_vars1(=, _399888)
^  Unify: (275) [user] mfix_vars1(=, _399888)
^  Call: (276) [user] symbol(=)
^  Unify: (276) [user] symbol(=)
   Call: (277) [system] atom(=)
   Exit: (277) [system] atom(=)
^  Exit: (276) [user] symbol(=)
^  Unify: (275) [user] mfix_vars1(=, =)
^  Exit: (275) [user] mfix_vars1(=, =)
   Call: (275) [apply] apply:maplist_([['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _399890, user:mfix_vars1)
   Unify: (275) [apply] apply:maplist_([['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [_437944|_437946], user:mfix_vars1)
^  Call: (276) [user] mfix_vars1(['if-decons-expr', _atom, _head, _tail, _then, _else], _437944)
^  Unify: (276) [user] mfix_vars1(['if-decons-expr', _atom, _head, _tail, _then, _else], _437944)
   Call: (277) [system] var(['if-decons-expr', _atom, _head, _tail, _then, _else])
^  Redo: (276) [user] mfix_vars1(['if-decons-expr', _atom, _head, _tail, _then, _else], _437944)
^  Unify: (276) [user] mfix_vars1(['if-decons-expr', _atom, _head, _tail, _then, _else], '$VAR'(_442590))
   Call: (277) [system] atom(['if-decons-expr', _atom, _head, _tail, _then, _else])
^  Redo: (276) [user] mfix_vars1(['if-decons-expr', _atom, _head, _tail, _then, _else], _437944)
^  Unify: (276) [user] mfix_vars1(['if-decons-expr', _atom, _head, _tail, _then, _else], _437944)
   Call: (277) [system] ['if-decons-expr', _atom, _head, _tail, _then, _else]==true
^  Redo: (276) [user] mfix_vars1(['if-decons-expr', _atom, _head, _tail, _then, _else], _437944)
^  Unify: (276) [user] mfix_vars1(['if-decons-expr', _atom, _head, _tail, _then, _else], _437944)
   Call: (277) [system] ['if-decons-expr', _atom, _head, _tail, _then, _else]==false
^  Redo: (276) [user] mfix_vars1(['if-decons-expr', _atom, _head, _tail, _then, _else], _437944)
^  Unify: (276) [user] mfix_vars1(['if-decons-expr', _atom, _head, _tail, _then, _else], _437944)
   Call: (277) [system] 'if-decons-expr'=='['
^  Redo: (276) [user] mfix_vars1(['if-decons-expr', _atom, _head, _tail, _then, _else], _437944)
^  Unify: (276) [user] mfix_vars1(['if-decons-expr', _atom, _head, _tail, _then, _else], _437944)
   Call: (277) [system] 'if-decons-expr'=='{'
^  Redo: (276) [user] mfix_vars1(['if-decons-expr', _atom, _head, _tail, _then, _else], _437944)
^  Unify: (276) [user] mfix_vars1(['if-decons-expr', _atom, _head, _tail, _then, _else], _437944)
   Call: (277) [system] is_list([_atom, _head, _tail, _then, _else])
   Exit: (277) [system] is_list([_atom, _head, _tail, _then, _else])
   Call: (277) [lists] lists:last([_atom, _head, _tail, _then, _else], _459284)
   Unify: (277) [lists] lists:last([_atom, _head, _tail, _then, _else], _459284)
   Call: (278) [lists] lists:last_([_head, _tail, _then, _else], _atom, _459284)
   Unify: (278) [lists] lists:last_([_head, _tail, _then, _else], _atom, _459284)
   Call: (279) [lists] lists:last_([_tail, _then, _else], _head, _459284)
   Unify: (279) [lists] lists:last_([_tail, _then, _else], _head, _459284)
   Call: (280) [lists] lists:last_([_then, _else], _tail, _459284)
   Unify: (280) [lists] lists:last_([_then, _else], _tail, _459284)
   Call: (281) [lists] lists:last_([_else], _then, _459284)
   Unify: (281) [lists] lists:last_([_else], _then, _459284)
   Call: (282) [lists] lists:last_([], _else, _459284)
   Unify: (282) [lists] lists:last_([], _else, _else)
   Exit: (282) [lists] lists:last_([], _else, _else)
   Exit: (281) [lists] lists:last_([_else], _then, _else)
   Exit: (280) [lists] lists:last_([_then, _else], _tail, _else)
   Exit: (279) [lists] lists:last_([_tail, _then, _else], _head, _else)
   Exit: (278) [lists] lists:last_([_head, _tail, _then, _else], _atom, _else)
   Exit: (277) [lists] lists:last([_atom, _head, _tail, _then, _else], _else)
   Call: (277) [system] _else=='}'
^  Redo: (276) [user] mfix_vars1(['if-decons-expr', _atom, _head, _tail, _then, _else], _437944)
^  Unify: (276) [user] mfix_vars1(['if-decons-expr', _atom, _head, _tail, _then, _else], _437944)
   Call: (277) [system] ['if-decons-expr', _atom, _head, _tail, _then, _else]==[_478836, _478842]
^  Redo: (276) [user] mfix_vars1(['if-decons-expr', _atom, _head, _tail, _then, _else], _437944)
^  Unify: (276) [user] mfix_vars1(['if-decons-expr', _atom, _head, _tail, _then, _else], _437944)
   Call: (277) [system] fail
^  Redo: (276) [user] mfix_vars1(['if-decons-expr', _atom, _head, _tail, _then, _else], _437944)
^  Unify: (276) [user] mfix_vars1(['if-decons-expr', _atom, _head, _tail, _then, _else], _437944)
   Call: (277) [system] is_list(['if-decons-expr', _atom, _head, _tail, _then, _else])
   Exit: (277) [system] is_list(['if-decons-expr', _atom, _head, _tail, _then, _else])
^  Call: (277) [user] apply:maplist(mfix_vars1, ['if-decons-expr', _atom, _head, _tail, _then, _else], _437944)
^  Unify: (277) [apply] apply:maplist(user:mfix_vars1, ['if-decons-expr', _atom, _head, _tail, _then, _else], _437944)
   Call: (278) [apply] apply:maplist_(['if-decons-expr', _atom, _head, _tail, _then, _else], _437944, user:mfix_vars1)
   Unify: (278) [apply] apply:maplist_(['if-decons-expr', _atom, _head, _tail, _then, _else], [_489066|_489068], user:mfix_vars1)
^  Call: (279) [user] mfix_vars1('if-decons-expr', _489066)
^  Unify: (279) [user] mfix_vars1('if-decons-expr', _489066)
   Call: (280) [system] var('if-decons-expr')
^  Redo: (279) [user] mfix_vars1('if-decons-expr', _489066)
^  Unify: (279) [user] mfix_vars1('if-decons-expr', '$VAR'(_493712))
   Call: (280) [system] atom('if-decons-expr')
   Exit: (280) [system] atom('if-decons-expr')
^  Call: (280) [user] symbol_concat($, _496490, 'if-decons-expr')
^  Unify: (280) [user] symbol_concat($, _496490, 'if-decons-expr')
   Call: (281) [system] atom_concat($, _496490, 'if-decons-expr')
   Fail: (281) [system] atom_concat($, _496490, 'if-decons-expr')
^  Fail: (280) [user] symbol_concat($, _496490, 'if-decons-expr')
^  Redo: (279) [user] mfix_vars1('if-decons-expr', _489066)
^  Unify: (279) [user] mfix_vars1('if-decons-expr', _489066)
   Call: (280) [system] 'if-decons-expr'==true
^  Redo: (279) [user] mfix_vars1('if-decons-expr', _489066)
^  Unify: (279) [user] mfix_vars1('if-decons-expr', _489066)
   Call: (280) [system] 'if-decons-expr'==false
^  Redo: (279) [user] mfix_vars1('if-decons-expr', _489066)
^  Unify: (279) [user] mfix_vars1('if-decons-expr', _489066)
   Call: (280) [system] 'if-decons-expr'==[_508578, _508584]
^  Redo: (279) [user] mfix_vars1('if-decons-expr', _489066)
^  Unify: (279) [user] mfix_vars1('if-decons-expr', _489066)
   Call: (280) [system] is_list('if-decons-expr')
^  Redo: (279) [user] mfix_vars1('if-decons-expr', _489066)
^  Unify: (279) [user] mfix_vars1('if-decons-expr', _489066)
   Call: (280) [system] string('if-decons-expr')
^  Redo: (279) [user] mfix_vars1('if-decons-expr', _489066)
^  Unify: (279) [user] mfix_vars1('if-decons-expr', _489066)
   Call: (280) [system] compound('if-decons-expr')
^  Redo: (279) [user] mfix_vars1('if-decons-expr', _489066)
^  Unify: (279) [user] mfix_vars1('if-decons-expr', _489066)
^  Call: (280) [user] symbol('if-decons-expr')
^  Unify: (280) [user] symbol('if-decons-expr')
   Call: (281) [system] atom('if-decons-expr')
   Exit: (281) [system] atom('if-decons-expr')
^  Exit: (280) [user] symbol('if-decons-expr')
^  Unify: (279) [user] mfix_vars1('if-decons-expr', 'if-decons-expr')
^  Exit: (279) [user] mfix_vars1('if-decons-expr', 'if-decons-expr')
   Call: (279) [apply] apply:maplist_([_atom, _head, _tail, _then, _else], _6274, user:mfix_vars1)
   Unify: (279) [apply] apply:maplist_([_atom, _head, _tail, _then, _else], [_9456|_9458], user:mfix_vars1)
^  Call: (280) [user] mfix_vars1(_atom, _9456)
^  Unify: (280) [user] mfix_vars1(_atom, _9456)
   Call: (281) [system] var(_atom)
^  Redo: (280) [user] mfix_vars1(_atom, _9456)
^  Unify: (280) [user] mfix_vars1(_atom, '$VAR'(_14102))
   Call: (281) [system] atom(_atom)
^  Redo: (280) [user] mfix_vars1(_atom, _9456)
^  Unify: (280) [user] mfix_vars1(_atom, _9456)
   Call: (281) [system] _atom==true
^  Redo: (280) [user] mfix_vars1(_atom, _9456)
^  Unify: (280) [user] mfix_vars1(_atom, _9456)
   Call: (281) [system] _atom==false
^  Redo: (280) [user] mfix_vars1(_atom, _9456)
^  Unify: (280) [user] mfix_vars1(_atom, _9456)
   Call: (281) [system] _atom==[_23382, _23388]
^  Redo: (280) [user] mfix_vars1(_atom, _9456)
^  Unify: (280) [user] mfix_vars1(_atom, _9456)
   Call: (281) [system] is_list(_atom)
^  Redo: (280) [user] mfix_vars1(_atom, _9456)
^  Unify: (280) [user] mfix_vars1(_atom, _9456)
   Call: (281) [system] string(_atom)
^  Redo: (280) [user] mfix_vars1(_atom, _9456)
^  Unify: (280) [user] mfix_vars1(_atom, _9456)
   Call: (281) [system] compound(_atom)
   Exit: (281) [system] compound(_atom)
   Call: (281) [system] compound_name_arguments(_atom, _33584, _33586)
   Exit: (281) [system] compound_name_arguments(_atom, '$VAR', ['_atom'])
   Call: (281) [system] '$VAR'\=='$VAR'
^  Redo: (269) [user] trly(mfix_vars1, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _6218)
^  Unify: (269) [user] trly(mfix_vars1, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Exit: (269) [user] trly(mfix_vars1, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Exit: (268) [system] once(user:trly(mfix_vars1, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]))
^  Exit: (267) [user] must_det_ll(user:trly(mfix_vars1, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]))
^  Call: (267) [user] must_det_ll(trly(cons_to_c, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _41042))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_c, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _41042))
^  Call: (268) [user] once(user:trly(cons_to_c, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _41042))
^  Unify: (268) [system] once(user:trly(cons_to_c, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _41042))
^  Call: (269) [user] trly(cons_to_c, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _41042)
^  Unify: (269) [user] trly(cons_to_c, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _41042)
^  Call: (270) [user] once(call(cons_to_c, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _46628))
^  Unify: (270) [system] once(user:call(cons_to_c, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _46628))
^  Call: (271) [user] call(cons_to_c, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _46628)
^  Unify: (271) [system] call(user:cons_to_c, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _46628)
^  Call: (272) [user] cons_to_c([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _46628)
^  Unify: (272) [user] cons_to_c([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_c([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Exit: (271) [system] call(user:cons_to_c, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Exit: (270) [system] once(user:call(cons_to_c, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]))
   Call: (270) [system] [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]\=@=[=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]
^  Redo: (269) [user] trly(cons_to_c, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _41042)
^  Unify: (269) [user] trly(cons_to_c, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Exit: (269) [user] trly(cons_to_c, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Exit: (268) [system] once(user:trly(cons_to_c, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_c, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]))
^  Call: (267) [user] must_det_ll(trly(cons_to_l, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _6198))
^  Unify: (267) [user] must_det_ll(user:trly(cons_to_l, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _6198))
^  Call: (268) [user] once(user:trly(cons_to_l, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _6198))
^  Unify: (268) [system] once(user:trly(cons_to_l, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _6198))
^  Call: (269) [user] trly(cons_to_l, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _6198)
^  Unify: (269) [user] trly(cons_to_l, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _6198)
^  Call: (270) [user] once(call(cons_to_l, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _68948))
^  Unify: (270) [system] once(user:call(cons_to_l, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _68948))
^  Call: (271) [user] call(cons_to_l, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _68948)
^  Unify: (271) [system] call(user:cons_to_l, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _68948)
^  Call: (272) [user] cons_to_l([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _68948)
^  Unify: (272) [user] cons_to_l([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Call: (273) [user] no_cons_reduce
^  Unify: (273) [user] no_cons_reduce
^  Exit: (273) [user] no_cons_reduce
^  Exit: (272) [user] cons_to_l([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Exit: (271) [system] call(user:cons_to_l, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Exit: (270) [system] once(user:call(cons_to_l, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]))
   Call: (270) [system] [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]\=@=[=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]
^  Redo: (269) [user] trly(cons_to_l, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _6198)
^  Unify: (269) [user] trly(cons_to_l, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Exit: (269) [user] trly(cons_to_l, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Exit: (268) [system] once(user:trly(cons_to_l, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]))
^  Exit: (267) [user] must_det_ll(user:trly(cons_to_l, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]))
^  Exit: (266) [user] untyped_to_metta([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Exit: (265) [system] call(user:untyped_to_metta, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Exit: (264) [system] once(user:call(untyped_to_metta, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]))
   Call: (264) [system] [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]\=@=[=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]]
^  Redo: (263) [user] trly(untyped_to_metta, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _5908)
^  Unify: (263) [user] trly(untyped_to_metta, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Exit: (263) [user] trly(untyped_to_metta, [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Exit: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
   Call: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])))
   Unify: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])))
   Exit: (262) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])))
^  Exit: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Exit: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Call: (257) [user] subst_vars([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _103256, [], _103258)
^  Unify: (257) [user] subst_vars([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [], [])
   Call: (258) [system] var([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Redo: (257) [user] subst_vars([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _103256, [], _103258)
^  Unify: (257) [user] subst_vars([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [_106994|_106996], [], _103258)
^  Call: (258) [user] subst_vars(=, _106994, [], _107934)
^  Unify: (258) [user] subst_vars(=, =, [], [])
   Call: (259) [system] var(=)
^  Redo: (258) [user] subst_vars(=, _106994, [], _107934)
^  Unify: (258) [user] subst_vars(=, _106994, [], _107934)
   Call: (259) [system] atom(=)
   Exit: (259) [system] atom(=)
^  Call: (259) [user] symbol_concat($, _114452, =)
^  Unify: (259) [user] symbol_concat($, _114452, =)
   Call: (260) [system] atom_concat($, _114452, =)
   Fail: (260) [system] atom_concat($, _114452, =)
^  Fail: (259) [user] symbol_concat($, _114452, =)
^  Redo: (258) [user] subst_vars(=, _106994, [], _107934)
^  Unify: (258) [user] subst_vars(=, _106994, [], _107934)
   Call: (259) [system] compound(=)
^  Redo: (258) [user] subst_vars(=, _106994, [], _107934)
^  Unify: (258) [user] subst_vars(=, =, [], [])
^  Exit: (258) [user] subst_vars(=, =, [], [])
^  Call: (258) [user] subst_vars([['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _106996, [], _103258)
^  Unify: (258) [user] subst_vars([['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [], [])
   Call: (259) [system] var([['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Redo: (258) [user] subst_vars([['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _106996, [], _103258)
^  Unify: (258) [user] subst_vars([['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [_128452|_128454], [], _103258)
^  Call: (259) [user] subst_vars(['if-decons-expr', _atom, _head, _tail, _then, _else], _128452, [], _129392)
^  Unify: (259) [user] subst_vars(['if-decons-expr', _atom, _head, _tail, _then, _else], ['if-decons-expr', _atom, _head, _tail, _then, _else], [], [])
   Call: (260) [system] var(['if-decons-expr', _atom, _head, _tail, _then, _else])
^  Redo: (259) [user] subst_vars(['if-decons-expr', _atom, _head, _tail, _then, _else], _128452, [], _129392)
^  Unify: (259) [user] subst_vars(['if-decons-expr', _atom, _head, _tail, _then, _else], [_133128|_133130], [], _129392)
^  Call: (260) [user] subst_vars('if-decons-expr', _133128, [], _134068)
^  Unify: (260) [user] subst_vars('if-decons-expr', 'if-decons-expr', [], [])
   Call: (261) [system] var('if-decons-expr')
^  Redo: (260) [user] subst_vars('if-decons-expr', _133128, [], _134068)
^  Unify: (260) [user] subst_vars('if-decons-expr', _133128, [], _134068)
   Call: (261) [system] atom('if-decons-expr')
   Exit: (261) [system] atom('if-decons-expr')
^  Call: (261) [user] symbol_concat($, _140586, 'if-decons-expr')
^  Unify: (261) [user] symbol_concat($, _140586, 'if-decons-expr')
   Call: (262) [system] atom_concat($, _140586, 'if-decons-expr')
   Fail: (262) [system] atom_concat($, _140586, 'if-decons-expr')
^  Fail: (261) [user] symbol_concat($, _140586, 'if-decons-expr')
^  Redo: (260) [user] subst_vars('if-decons-expr', _133128, [], _134068)
^  Unify: (260) [user] subst_vars('if-decons-expr', _133128, [], _134068)
   Call: (261) [system] compound('if-decons-expr')
^  Redo: (260) [user] subst_vars('if-decons-expr', _133128, [], _134068)
^  Unify: (260) [user] subst_vars('if-decons-expr', 'if-decons-expr', [], [])
^  Exit: (260) [user] subst_vars('if-decons-expr', 'if-decons-expr', [], [])
^  Call: (260) [user] subst_vars([_atom, _head, _tail, _then, _else], _133130, [], _129392)
^  Unify: (260) [user] subst_vars([_atom, _head, _tail, _then, _else], [_atom, _head, _tail, _then, _else], [], [])
   Call: (261) [system] var([_atom, _head, _tail, _then, _else])
^  Redo: (260) [user] subst_vars([_atom, _head, _tail, _then, _else], _133130, [], _129392)
^  Unify: (260) [user] subst_vars([_atom, _head, _tail, _then, _else], [_154586|_154588], [], _129392)
^  Call: (261) [user] subst_vars(_atom, _154586, [], _155526)
^  Unify: (261) [user] subst_vars(_atom, _atom, [], [])
   Call: (262) [system] var(_atom)
^  Redo: (261) [user] subst_vars(_atom, _154586, [], _155526)
^  Unify: (261) [user] subst_vars(_atom, _154586, [], _155526)
   Call: (262) [system] nonvar('_atom')
   Exit: (262) [system] nonvar('_atom')
^  Call: (262) [user] svar_fixvarname_dont_capitalize('_atom', _162044)
^  Unify: (262) [user] svar_fixvarname_dont_capitalize('_atom', '_atom')
^  Exit: (262) [user] svar_fixvarname_dont_capitalize('_atom', '_atom')
   Call: (262) [system] memberchk('_atom'=_154586, [])
   Unify: (262) [system] memberchk('_atom'=_154586, [])
^  Redo: (261) [user] subst_vars(_atom, _154586, [], _155526)
   Call: (262) [system] _155526=['_atom'=_154586]
   Exit: (262) [system] ['_atom'=_154586]=['_atom'=_154586]
^  Exit: (261) [user] subst_vars(_atom, _154586, [], ['_atom'=_154586])
^  Call: (261) [user] subst_vars([_head, _tail, _then, _else], _154588, ['_atom'=_154586], _129392)
^  Unify: (261) [user] subst_vars([_head, _tail, _then, _else], [_head, _tail, _then, _else], ['_atom'=_154586], ['_atom'=_154586])
   Call: (262) [system] var([_head, _tail, _then, _else])
^  Redo: (261) [user] subst_vars([_head, _tail, _then, _else], _154588, ['_atom'=_154586], _129392)
^  Unify: (261) [user] subst_vars([_head, _tail, _then, _else], [_174166|_174168], ['_atom'=_154586], _129392)
^  Call: (262) [user] subst_vars(_head, _174166, ['_atom'=_154586], _175106)
^  Unify: (262) [user] subst_vars(_head, _head, ['_atom'=_154586], ['_atom'=_154586])
   Call: (263) [system] var(_head)
^  Redo: (262) [user] subst_vars(_head, _174166, ['_atom'=_154586], _175106)
^  Unify: (262) [user] subst_vars(_head, _174166, ['_atom'=_154586], _175106)
   Call: (263) [system] nonvar('_head')
   Exit: (263) [system] nonvar('_head')
^  Call: (263) [user] svar_fixvarname_dont_capitalize('_head', _181624)
^  Unify: (263) [user] svar_fixvarname_dont_capitalize('_head', '_head')
^  Exit: (263) [user] svar_fixvarname_dont_capitalize('_head', '_head')
   Call: (263) [system] memberchk('_head'=_174166, ['_atom'=_154586])
   Unify: (263) [system] memberchk('_head'=_174166, ['_atom'=_154586])
^  Redo: (262) [user] subst_vars(_head, _174166, ['_atom'=_154586], _175106)
   Call: (263) [system] _175106=['_head'=_174166, '_atom'=_154586]
   Exit: (263) [system] ['_head'=_174166, '_atom'=_154586]=['_head'=_174166, '_atom'=_154586]
^  Exit: (262) [user] subst_vars(_head, _174166, ['_atom'=_154586], ['_head'=_174166, '_atom'=_154586])
^  Call: (262) [user] subst_vars([_tail, _then, _else], _174168, ['_head'=_174166, '_atom'=_154586], _129392)
^  Unify: (262) [user] subst_vars([_tail, _then, _else], [_tail, _then, _else], ['_head'=_174166, '_atom'=_154586], ['_head'=_174166, '_atom'=_154586])
   Call: (263) [system] var([_tail, _then, _else])
^  Redo: (262) [user] subst_vars([_tail, _then, _else], _174168, ['_head'=_174166, '_atom'=_154586], _129392)
^  Unify: (262) [user] subst_vars([_tail, _then, _else], [_193746|_193748], ['_head'=_174166, '_atom'=_154586], _129392)
^  Call: (263) [user] subst_vars(_tail, _193746, ['_head'=_174166, '_atom'=_154586], _194686)
^  Unify: (263) [user] subst_vars(_tail, _tail, ['_head'=_174166, '_atom'=_154586], ['_head'=_174166, '_atom'=_154586])
   Call: (264) [system] var(_tail)
^  Redo: (263) [user] subst_vars(_tail, _193746, ['_head'=_174166, '_atom'=_154586], _194686)
^  Unify: (263) [user] subst_vars(_tail, _193746, ['_head'=_174166, '_atom'=_154586], _194686)
   Call: (264) [system] nonvar('_tail')
   Exit: (264) [system] nonvar('_tail')
^  Call: (264) [user] svar_fixvarname_dont_capitalize('_tail', _201204)
^  Unify: (264) [user] svar_fixvarname_dont_capitalize('_tail', '_tail')
^  Exit: (264) [user] svar_fixvarname_dont_capitalize('_tail', '_tail')
   Call: (264) [system] memberchk('_tail'=_193746, ['_head'=_174166, '_atom'=_154586])
   Unify: (264) [system] memberchk('_tail'=_193746, ['_head'=_174166, '_atom'=_154586])
^  Redo: (263) [user] subst_vars(_tail, _193746, ['_head'=_174166, '_atom'=_154586], _194686)
   Call: (264) [system] _194686=['_tail'=_193746, '_head'=_174166, '_atom'=_154586]
   Exit: (264) [system] ['_tail'=_193746, '_head'=_174166, '_atom'=_154586]=['_tail'=_193746, '_head'=_174166, '_atom'=_154586]
^  Exit: (263) [user] subst_vars(_tail, _193746, ['_head'=_174166, '_atom'=_154586], ['_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Call: (263) [user] subst_vars([_then, _else], _193748, ['_tail'=_193746, '_head'=_174166, '_atom'=_154586], _129392)
^  Unify: (263) [user] subst_vars([_then, _else], [_then, _else], ['_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (264) [system] var([_then, _else])
^  Redo: (263) [user] subst_vars([_then, _else], _193748, ['_tail'=_193746, '_head'=_174166, '_atom'=_154586], _129392)
^  Unify: (263) [user] subst_vars([_then, _else], [_213326|_213328], ['_tail'=_193746, '_head'=_174166, '_atom'=_154586], _129392)
^  Call: (264) [user] subst_vars(_then, _213326, ['_tail'=_193746, '_head'=_174166, '_atom'=_154586], _214266)
^  Unify: (264) [user] subst_vars(_then, _then, ['_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (265) [system] var(_then)
^  Redo: (264) [user] subst_vars(_then, _213326, ['_tail'=_193746, '_head'=_174166, '_atom'=_154586], _214266)
^  Unify: (264) [user] subst_vars(_then, _213326, ['_tail'=_193746, '_head'=_174166, '_atom'=_154586], _214266)
   Call: (265) [system] nonvar('_then')
   Exit: (265) [system] nonvar('_then')
^  Call: (265) [user] svar_fixvarname_dont_capitalize('_then', _220784)
^  Unify: (265) [user] svar_fixvarname_dont_capitalize('_then', '_then')
^  Exit: (265) [user] svar_fixvarname_dont_capitalize('_then', '_then')
   Call: (265) [system] memberchk('_then'=_213326, ['_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Unify: (265) [system] memberchk('_then'=_213326, ['_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Redo: (264) [user] subst_vars(_then, _213326, ['_tail'=_193746, '_head'=_174166, '_atom'=_154586], _214266)
   Call: (265) [system] _214266=['_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586]
   Exit: (265) [system] ['_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586]=['_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586]
^  Exit: (264) [user] subst_vars(_then, _213326, ['_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Call: (264) [user] subst_vars([_else], _213328, ['_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _129392)
^  Unify: (264) [user] subst_vars([_else], [_else], ['_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (265) [system] var([_else])
^  Redo: (264) [user] subst_vars([_else], _213328, ['_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _129392)
^  Unify: (264) [user] subst_vars([_else], [_232906|_232908], ['_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _129392)
^  Call: (265) [user] subst_vars(_else, _232906, ['_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _233846)
^  Unify: (265) [user] subst_vars(_else, _else, ['_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (266) [system] var(_else)
^  Redo: (265) [user] subst_vars(_else, _232906, ['_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _233846)
^  Unify: (265) [user] subst_vars(_else, _232906, ['_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _233846)
   Call: (266) [system] nonvar('_else')
   Exit: (266) [system] nonvar('_else')
^  Call: (266) [user] svar_fixvarname_dont_capitalize('_else', _240364)
^  Unify: (266) [user] svar_fixvarname_dont_capitalize('_else', '_else')
^  Exit: (266) [user] svar_fixvarname_dont_capitalize('_else', '_else')
   Call: (266) [system] memberchk('_else'=_232906, ['_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Unify: (266) [system] memberchk('_else'=_232906, ['_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Redo: (265) [user] subst_vars(_else, _232906, ['_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _233846)
   Call: (266) [system] _233846=['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586]
   Exit: (266) [system] ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586]=['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586]
^  Exit: (265) [user] subst_vars(_else, _232906, ['_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Call: (265) [user] subst_vars([], _232908, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _129392)
^  Unify: (265) [user] subst_vars([], [], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (266) [system] var([])
^  Redo: (265) [user] subst_vars([], _232908, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _129392)
^  Unify: (265) [user] subst_vars([], [], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Exit: (265) [user] subst_vars([], [], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Exit: (264) [user] subst_vars([_else], [_232906], ['_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Exit: (263) [user] subst_vars([_then, _else], [_213326, _232906], ['_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Exit: (262) [user] subst_vars([_tail, _then, _else], [_193746, _213326, _232906], ['_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Exit: (261) [user] subst_vars([_head, _tail, _then, _else], [_174166, _193746, _213326, _232906], ['_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Exit: (260) [user] subst_vars([_atom, _head, _tail, _then, _else], [_154586, _174166, _193746, _213326, _232906], [], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Exit: (259) [user] subst_vars(['if-decons-expr', _atom, _head, _tail, _then, _else], ['if-decons-expr', _154586, _174166, _193746, _213326, _232906], [], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Call: (259) [user] subst_vars([[function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _128454, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _103258)
^  Unify: (259) [user] subst_vars([[function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [[function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (260) [system] var([[function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]])
^  Redo: (259) [user] subst_vars([[function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], _128454, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _103258)
^  Unify: (259) [user] subst_vars([[function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [_263706|_263708], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _103258)
^  Call: (260) [user] subst_vars([function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]], _263706, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _264646)
^  Unify: (260) [user] subst_vars([function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (261) [system] var([function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]])
^  Redo: (260) [user] subst_vars([function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]], _263706, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _264646)
^  Unify: (260) [user] subst_vars([function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]], [_268382|_268384], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _264646)
^  Call: (261) [user] subst_vars(function, _268382, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _269322)
^  Unify: (261) [user] subst_vars(function, function, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (262) [system] var(function)
^  Redo: (261) [user] subst_vars(function, _268382, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _269322)
^  Unify: (261) [user] subst_vars(function, _268382, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _269322)
   Call: (262) [system] atom(function)
   Exit: (262) [system] atom(function)
^  Call: (262) [user] symbol_concat($, _275840, function)
^  Unify: (262) [user] symbol_concat($, _275840, function)
   Call: (263) [system] atom_concat($, _275840, function)
   Fail: (263) [system] atom_concat($, _275840, function)
^  Fail: (262) [user] symbol_concat($, _275840, function)
^  Redo: (261) [user] subst_vars(function, _268382, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _269322)
^  Unify: (261) [user] subst_vars(function, _268382, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _269322)
   Call: (262) [system] compound(function)
^  Redo: (261) [user] subst_vars(function, _268382, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _269322)
^  Unify: (261) [user] subst_vars(function, function, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Exit: (261) [user] subst_vars(function, function, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Call: (261) [user] subst_vars([[eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]], _268384, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _264646)
^  Unify: (261) [user] subst_vars([[eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]], [[eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (262) [system] var([[eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]])
^  Redo: (261) [user] subst_vars([[eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]], _268384, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _264646)
^  Unify: (261) [user] subst_vars([[eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]], [_289840|_289842], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _264646)
^  Call: (262) [user] subst_vars([eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]], _289840, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _290780)
^  Unify: (262) [user] subst_vars([eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]], [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (263) [system] var([eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]])
^  Redo: (262) [user] subst_vars([eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]], _289840, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _290780)
^  Unify: (262) [user] subst_vars([eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]], [_294516|_294518], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _290780)
^  Call: (263) [user] subst_vars(eval, _294516, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _295456)
^  Unify: (263) [user] subst_vars(eval, eval, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (264) [system] var(eval)
^  Redo: (263) [user] subst_vars(eval, _294516, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _295456)
^  Unify: (263) [user] subst_vars(eval, _294516, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _295456)
   Call: (264) [system] atom(eval)
   Exit: (264) [system] atom(eval)
^  Call: (264) [user] symbol_concat($, _301974, eval)
^  Unify: (264) [user] symbol_concat($, _301974, eval)
   Call: (265) [system] atom_concat($, _301974, eval)
   Fail: (265) [system] atom_concat($, _301974, eval)
^  Fail: (264) [user] symbol_concat($, _301974, eval)
^  Redo: (263) [user] subst_vars(eval, _294516, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _295456)
^  Unify: (263) [user] subst_vars(eval, _294516, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _295456)
   Call: (264) [system] compound(eval)
^  Redo: (263) [user] subst_vars(eval, _294516, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _295456)
^  Unify: (263) [user] subst_vars(eval, eval, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Exit: (263) [user] subst_vars(eval, eval, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Call: (263) [user] subst_vars([['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]], _294518, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _290780)
^  Unify: (263) [user] subst_vars([['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]], [['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (264) [system] var([['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]])
^  Redo: (263) [user] subst_vars([['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]], _294518, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _290780)
^  Unify: (263) [user] subst_vars([['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]], [_315974|_315976], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _290780)
^  Call: (264) [user] subst_vars(['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], _315974, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _316914)
^  Unify: (264) [user] subst_vars(['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (265) [system] var(['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]])
^  Redo: (264) [user] subst_vars(['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], _315974, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _316914)
^  Unify: (264) [user] subst_vars(['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], [_320650|_320652], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _316914)
^  Call: (265) [user] subst_vars('if-equal', _320650, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _321590)
^  Unify: (265) [user] subst_vars('if-equal', 'if-equal', ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (266) [system] var('if-equal')
^  Redo: (265) [user] subst_vars('if-equal', _320650, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _321590)
^  Unify: (265) [user] subst_vars('if-equal', _320650, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _321590)
   Call: (266) [system] atom('if-equal')
   Exit: (266) [system] atom('if-equal')
^  Call: (266) [user] symbol_concat($, _328108, 'if-equal')
^  Unify: (266) [user] symbol_concat($, _328108, 'if-equal')
   Call: (267) [system] atom_concat($, _328108, 'if-equal')
   Fail: (267) [system] atom_concat($, _328108, 'if-equal')
^  Fail: (266) [user] symbol_concat($, _328108, 'if-equal')
^  Redo: (265) [user] subst_vars('if-equal', _320650, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _321590)
^  Unify: (265) [user] subst_vars('if-equal', _320650, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _321590)
   Call: (266) [system] compound('if-equal')
^  Redo: (265) [user] subst_vars('if-equal', _320650, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _321590)
^  Unify: (265) [user] subst_vars('if-equal', 'if-equal', ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Exit: (265) [user] subst_vars('if-equal', 'if-equal', ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Call: (265) [user] subst_vars([_atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], _320652, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _316914)
^  Unify: (265) [user] subst_vars([_atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], [_atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (266) [system] var([_atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]])
^  Redo: (265) [user] subst_vars([_atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], _320652, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _316914)
^  Unify: (265) [user] subst_vars([_atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], [_342108|_342110], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _316914)
^  Call: (266) [user] subst_vars(_atom, _342108, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _343048)
^  Unify: (266) [user] subst_vars(_atom, _atom, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (267) [system] var(_atom)
^  Redo: (266) [user] subst_vars(_atom, _342108, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _343048)
^  Unify: (266) [user] subst_vars(_atom, _342108, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _343048)
   Call: (267) [system] nonvar('_atom')
   Exit: (267) [system] nonvar('_atom')
^  Call: (267) [user] svar_fixvarname_dont_capitalize('_atom', _349566)
^  Unify: (267) [user] svar_fixvarname_dont_capitalize('_atom', '_atom')
^  Exit: (267) [user] svar_fixvarname_dont_capitalize('_atom', '_atom')
   Call: (267) [system] memberchk('_atom'=_342108, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Unify: (267) [system] memberchk('_atom'=_342108, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (268) [system] nonvar([])
   Exit: (268) [system] nonvar([])
   Exit: (267) [system] memberchk('_atom'=_154586, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (267) [system] _343048=['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586]
   Exit: (267) [system] ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586]=['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586]
^  Exit: (266) [user] subst_vars(_atom, _154586, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Call: (266) [user] subst_vars([[], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], _342110, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _316914)
^  Unify: (266) [user] subst_vars([[], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], [[], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (267) [system] var([[], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]])
^  Redo: (266) [user] subst_vars([[], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], _342110, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _316914)
^  Unify: (266) [user] subst_vars([[], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], [_363518|_363520], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _316914)
^  Call: (267) [user] subst_vars([], _363518, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _364458)
^  Unify: (267) [user] subst_vars([], [], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (268) [system] var([])
^  Redo: (267) [user] subst_vars([], _363518, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _364458)
^  Unify: (267) [user] subst_vars([], [], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Exit: (267) [user] subst_vars([], [], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Call: (267) [user] subst_vars([[return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], _363520, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _316914)
^  Unify: (267) [user] subst_vars([[return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], [[return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (268) [system] var([[return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]])
^  Redo: (267) [user] subst_vars([[return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], _363520, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _316914)
^  Unify: (267) [user] subst_vars([[return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], [_373798|_373800], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _316914)
^  Call: (268) [user] subst_vars([return, _else], _373798, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _374738)
^  Unify: (268) [user] subst_vars([return, _else], [return, _else], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (269) [system] var([return, _else])
^  Redo: (268) [user] subst_vars([return, _else], _373798, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _374738)
^  Unify: (268) [user] subst_vars([return, _else], [_378474|_378476], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _374738)
^  Call: (269) [user] subst_vars(return, _378474, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _379414)
^  Unify: (269) [user] subst_vars(return, return, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (270) [system] var(return)
^  Redo: (269) [user] subst_vars(return, _378474, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _379414)
^  Unify: (269) [user] subst_vars(return, _378474, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _379414)
   Call: (270) [system] atom(return)
   Exit: (270) [system] atom(return)
^  Call: (270) [user] symbol_concat($, _385932, return)
^  Unify: (270) [user] symbol_concat($, _385932, return)
   Call: (271) [system] atom_concat($, _385932, return)
   Fail: (271) [system] atom_concat($, _385932, return)
^  Fail: (270) [user] symbol_concat($, _385932, return)
^  Redo: (269) [user] subst_vars(return, _378474, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _379414)
^  Unify: (269) [user] subst_vars(return, _378474, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _379414)
   Call: (270) [system] compound(return)
^  Redo: (269) [user] subst_vars(return, _378474, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _379414)
^  Unify: (269) [user] subst_vars(return, return, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Exit: (269) [user] subst_vars(return, return, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Call: (269) [user] subst_vars([_else], _378476, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _374738)
^  Unify: (269) [user] subst_vars([_else], [_else], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (270) [system] var([_else])
^  Redo: (269) [user] subst_vars([_else], _378476, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _374738)
^  Unify: (269) [user] subst_vars([_else], [_399932|_399934], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _374738)
^  Call: (270) [user] subst_vars(_else, _399932, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _400872)
^  Unify: (270) [user] subst_vars(_else, _else, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (271) [system] var(_else)
^  Redo: (270) [user] subst_vars(_else, _399932, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _400872)
^  Unify: (270) [user] subst_vars(_else, _399932, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _400872)
   Call: (271) [system] nonvar('_else')
   Exit: (271) [system] nonvar('_else')
^  Call: (271) [user] svar_fixvarname_dont_capitalize('_else', _407390)
^  Unify: (271) [user] svar_fixvarname_dont_capitalize('_else', '_else')
^  Exit: (271) [user] svar_fixvarname_dont_capitalize('_else', '_else')
   Call: (271) [system] memberchk('_else'=_399932, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Unify: (271) [system] memberchk('_else'=_399932, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (272) [system] nonvar([])
   Exit: (272) [system] nonvar([])
   Exit: (271) [system] memberchk('_else'=_232906, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (271) [system] _400872=['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586]
   Exit: (271) [system] ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586]=['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586]
^  Exit: (270) [user] subst_vars(_else, _232906, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Call: (270) [user] subst_vars([], _399934, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _374738)
^  Unify: (270) [user] subst_vars([], [], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (271) [system] var([])
^  Redo: (270) [user] subst_vars([], _399934, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _374738)
^  Unify: (270) [user] subst_vars([], [], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Exit: (270) [user] subst_vars([], [], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Exit: (269) [user] subst_vars([_else], [_232906], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Exit: (268) [user] subst_vars([return, _else], [return, _232906], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Call: (268) [user] subst_vars([[chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], _373800, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _316914)
^  Unify: (268) [user] subst_vars([[chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], [[chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (269) [system] var([[chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]])
^  Redo: (268) [user] subst_vars([[chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], _373800, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _316914)
^  Unify: (268) [user] subst_vars([[chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], [_428818|_428820], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _316914)
^  Call: (269) [user] subst_vars([chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]], _428818, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _429758)
^  Unify: (269) [user] subst_vars([chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (270) [system] var([chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]])
^  Redo: (269) [user] subst_vars([chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]], _428818, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _429758)
^  Unify: (269) [user] subst_vars([chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]], [_433494|_433496], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _429758)
^  Call: (270) [user] subst_vars(chain, _433494, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _434434)
^  Unify: (270) [user] subst_vars(chain, chain, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (271) [system] var(chain)
^  Redo: (270) [user] subst_vars(chain, _433494, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _434434)
^  Unify: (270) [user] subst_vars(chain, _433494, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _434434)
   Call: (271) [system] atom(chain)
   Exit: (271) [system] atom(chain)
^  Call: (271) [user] symbol_concat($, _440952, chain)
^  Unify: (271) [user] symbol_concat($, _440952, chain)
   Call: (272) [system] atom_concat($, _440952, chain)
   Fail: (272) [system] atom_concat($, _440952, chain)
^  Fail: (271) [user] symbol_concat($, _440952, chain)
^  Redo: (270) [user] subst_vars(chain, _433494, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _434434)
^  Unify: (270) [user] subst_vars(chain, _433494, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _434434)
   Call: (271) [system] compound(chain)
^  Redo: (270) [user] subst_vars(chain, _433494, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _434434)
^  Unify: (270) [user] subst_vars(chain, chain, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Exit: (270) [user] subst_vars(chain, chain, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Call: (270) [user] subst_vars([['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]], _433496, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _429758)
^  Unify: (270) [user] subst_vars([['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]], [['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (271) [system] var([['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]])
^  Redo: (270) [user] subst_vars([['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]], _433496, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _429758)
^  Unify: (270) [user] subst_vars([['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]], [_454952|_454954], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _429758)
^  Call: (271) [user] subst_vars(['decons-atom', _atom], _454952, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _455892)
^  Unify: (271) [user] subst_vars(['decons-atom', _atom], ['decons-atom', _atom], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (272) [system] var(['decons-atom', _atom])
^  Redo: (271) [user] subst_vars(['decons-atom', _atom], _454952, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _455892)
^  Unify: (271) [user] subst_vars(['decons-atom', _atom], [_459628|_459630], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _455892)
^  Call: (272) [user] subst_vars('decons-atom', _459628, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _460568)
^  Unify: (272) [user] subst_vars('decons-atom', 'decons-atom', ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (273) [system] var('decons-atom')
^  Redo: (272) [user] subst_vars('decons-atom', _459628, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _460568)
^  Unify: (272) [user] subst_vars('decons-atom', _459628, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _460568)
   Call: (273) [system] atom('decons-atom')
   Exit: (273) [system] atom('decons-atom')
^  Call: (273) [user] symbol_concat($, _467086, 'decons-atom')
^  Unify: (273) [user] symbol_concat($, _467086, 'decons-atom')
   Call: (274) [system] atom_concat($, _467086, 'decons-atom')
   Fail: (274) [system] atom_concat($, _467086, 'decons-atom')
^  Fail: (273) [user] symbol_concat($, _467086, 'decons-atom')
^  Redo: (272) [user] subst_vars('decons-atom', _459628, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _460568)
^  Unify: (272) [user] subst_vars('decons-atom', _459628, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _460568)
   Call: (273) [system] compound('decons-atom')
^  Redo: (272) [user] subst_vars('decons-atom', _459628, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _460568)
^  Unify: (272) [user] subst_vars('decons-atom', 'decons-atom', ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Exit: (272) [user] subst_vars('decons-atom', 'decons-atom', ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Call: (272) [user] subst_vars([_atom], _459630, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _455892)
^  Unify: (272) [user] subst_vars([_atom], [_atom], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (273) [system] var([_atom])
^  Redo: (272) [user] subst_vars([_atom], _459630, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _455892)
^  Unify: (272) [user] subst_vars([_atom], [_481086|_481088], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _455892)
^  Call: (273) [user] subst_vars(_atom, _481086, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _482026)
^  Unify: (273) [user] subst_vars(_atom, _atom, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (274) [system] var(_atom)
^  Redo: (273) [user] subst_vars(_atom, _481086, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _482026)
^  Unify: (273) [user] subst_vars(_atom, _481086, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _482026)
   Call: (274) [system] nonvar('_atom')
   Exit: (274) [system] nonvar('_atom')
^  Call: (274) [user] svar_fixvarname_dont_capitalize('_atom', _488544)
^  Unify: (274) [user] svar_fixvarname_dont_capitalize('_atom', '_atom')
^  Exit: (274) [user] svar_fixvarname_dont_capitalize('_atom', '_atom')
   Call: (274) [system] memberchk('_atom'=_481086, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Unify: (274) [system] memberchk('_atom'=_481086, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (275) [system] nonvar([])
   Exit: (275) [system] nonvar([])
   Exit: (274) [system] memberchk('_atom'=_154586, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (274) [system] _482026=['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586]
   Exit: (274) [system] ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586]=['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586]
^  Exit: (273) [user] subst_vars(_atom, _154586, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Call: (273) [user] subst_vars([], _481088, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _455892)
^  Unify: (273) [user] subst_vars([], [], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (274) [system] var([])
^  Redo: (273) [user] subst_vars([], _481088, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _455892)
^  Unify: (273) [user] subst_vars([], [], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Exit: (273) [user] subst_vars([], [], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Exit: (272) [user] subst_vars([_atom], [_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Exit: (271) [user] subst_vars(['decons-atom', _atom], ['decons-atom', _154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Call: (271) [user] subst_vars([_list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]], _454954, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _429758)
^  Unify: (271) [user] subst_vars([_list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]], [_list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (272) [system] var([_list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]])
^  Redo: (271) [user] subst_vars([_list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]], _454954, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _429758)
^  Unify: (271) [user] subst_vars([_list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]], [_509972|_509974], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _429758)
^  Call: (272) [user] subst_vars(_list, _509972, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _510912)
^  Unify: (272) [user] subst_vars(_list, _list, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Call: (273) [system] var(_list)
^  Redo: (272) [user] subst_vars(_list, _509972, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _510912)
^  Unify: (272) [user] subst_vars(_list, _509972, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _510912)
   Call: (273) [system] nonvar('_list')
   Exit: (273) [system] nonvar('_list')
^  Call: (273) [user] svar_fixvarname_dont_capitalize('_list', _517430)
^  Unify: (273) [user] svar_fixvarname_dont_capitalize('_list', '_list')
^  Exit: (273) [user] svar_fixvarname_dont_capitalize('_list', '_list')
   Call: (273) [system] memberchk('_list'=_509972, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
   Unify: (273) [system] memberchk('_list'=_509972, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586])
^  Redo: (272) [user] subst_vars(_list, _509972, ['_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586], _510912)
   Call: (273) [system] _510912=['_list'=_509972, '_else'=_232906, '_then'=_213326, '_tail'=_193746, '_head'=_174166, '_atom'=_154586]
   Exit: (273) [system] ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216]=['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216]
^  Exit: (272) [user] subst_vars(_list, _6426, ['_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Call: (272) [user] subst_vars([[unify, _list, [_head, _tail], [return, _then], [return, _else]]], _6428, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _6394)
^  Unify: (272) [user] subst_vars([[unify, _list, [_head, _tail], [return, _then], [return, _else]]], [[unify, _list, [_head, _tail], [return, _then], [return, _else]]], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (273) [system] var([[unify, _list, [_head, _tail], [return, _then], [return, _else]]])
^  Redo: (272) [user] subst_vars([[unify, _list, [_head, _tail], [return, _then], [return, _else]]], _6428, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _6394)
^  Unify: (272) [user] subst_vars([[unify, _list, [_head, _tail], [return, _then], [return, _else]]], [_11986|_11988], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _6394)
^  Call: (273) [user] subst_vars([unify, _list, [_head, _tail], [return, _then], [return, _else]], _11986, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _12926)
^  Unify: (273) [user] subst_vars([unify, _list, [_head, _tail], [return, _then], [return, _else]], [unify, _list, [_head, _tail], [return, _then], [return, _else]], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (274) [system] var([unify, _list, [_head, _tail], [return, _then], [return, _else]])
^  Redo: (273) [user] subst_vars([unify, _list, [_head, _tail], [return, _then], [return, _else]], _11986, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _12926)
^  Unify: (273) [user] subst_vars([unify, _list, [_head, _tail], [return, _then], [return, _else]], [_16662|_16664], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _12926)
^  Call: (274) [user] subst_vars(unify, _16662, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _17602)
^  Unify: (274) [user] subst_vars(unify, unify, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (275) [system] var(unify)
^  Redo: (274) [user] subst_vars(unify, _16662, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _17602)
^  Unify: (274) [user] subst_vars(unify, _16662, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _17602)
   Call: (275) [system] atom(unify)
   Exit: (275) [system] atom(unify)
^  Call: (275) [user] symbol_concat($, _24120, unify)
^  Unify: (275) [user] symbol_concat($, _24120, unify)
   Call: (276) [system] atom_concat($, _24120, unify)
   Fail: (276) [system] atom_concat($, _24120, unify)
^  Fail: (275) [user] symbol_concat($, _24120, unify)
^  Redo: (274) [user] subst_vars(unify, _16662, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _17602)
^  Unify: (274) [user] subst_vars(unify, _16662, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _17602)
   Call: (275) [system] compound(unify)
^  Redo: (274) [user] subst_vars(unify, _16662, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _17602)
^  Unify: (274) [user] subst_vars(unify, unify, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (274) [user] subst_vars(unify, unify, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Call: (274) [user] subst_vars([_list, [_head, _tail], [return, _then], [return, _else]], _16664, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _12926)
^  Unify: (274) [user] subst_vars([_list, [_head, _tail], [return, _then], [return, _else]], [_list, [_head, _tail], [return, _then], [return, _else]], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (275) [system] var([_list, [_head, _tail], [return, _then], [return, _else]])
^  Redo: (274) [user] subst_vars([_list, [_head, _tail], [return, _then], [return, _else]], _16664, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _12926)
^  Unify: (274) [user] subst_vars([_list, [_head, _tail], [return, _then], [return, _else]], [_38120|_38122], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _12926)
^  Call: (275) [user] subst_vars(_list, _38120, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _39060)
^  Unify: (275) [user] subst_vars(_list, _list, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (276) [system] var(_list)
^  Redo: (275) [user] subst_vars(_list, _38120, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _39060)
^  Unify: (275) [user] subst_vars(_list, _38120, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _39060)
   Call: (276) [system] nonvar('_list')
   Exit: (276) [system] nonvar('_list')
^  Call: (276) [user] svar_fixvarname_dont_capitalize('_list', _45578)
^  Unify: (276) [user] svar_fixvarname_dont_capitalize('_list', '_list')
^  Exit: (276) [user] svar_fixvarname_dont_capitalize('_list', '_list')
   Call: (276) [system] memberchk('_list'=_38120, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Unify: (276) [system] memberchk('_list'=_38120, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (277) [system] nonvar([])
   Exit: (277) [system] nonvar([])
   Exit: (276) [system] memberchk('_list'=_6426, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (276) [system] _39060=['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216]
   Exit: (276) [system] ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216]=['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216]
^  Exit: (275) [user] subst_vars(_list, _6426, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Call: (275) [user] subst_vars([[_head, _tail], [return, _then], [return, _else]], _38122, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _12926)
^  Unify: (275) [user] subst_vars([[_head, _tail], [return, _then], [return, _else]], [[_head, _tail], [return, _then], [return, _else]], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (276) [system] var([[_head, _tail], [return, _then], [return, _else]])
^  Redo: (275) [user] subst_vars([[_head, _tail], [return, _then], [return, _else]], _38122, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _12926)
^  Unify: (275) [user] subst_vars([[_head, _tail], [return, _then], [return, _else]], [_59530|_59532], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _12926)
^  Call: (276) [user] subst_vars([_head, _tail], _59530, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _60470)
^  Unify: (276) [user] subst_vars([_head, _tail], [_head, _tail], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (277) [system] var([_head, _tail])
^  Redo: (276) [user] subst_vars([_head, _tail], _59530, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _60470)
^  Unify: (276) [user] subst_vars([_head, _tail], [_64206|_64208], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _60470)
^  Call: (277) [user] subst_vars(_head, _64206, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _65146)
^  Unify: (277) [user] subst_vars(_head, _head, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (278) [system] var(_head)
^  Redo: (277) [user] subst_vars(_head, _64206, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _65146)
^  Unify: (277) [user] subst_vars(_head, _64206, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _65146)
   Call: (278) [system] nonvar('_head')
   Exit: (278) [system] nonvar('_head')
^  Call: (278) [user] svar_fixvarname_dont_capitalize('_head', _71664)
^  Unify: (278) [user] svar_fixvarname_dont_capitalize('_head', '_head')
^  Exit: (278) [user] svar_fixvarname_dont_capitalize('_head', '_head')
   Call: (278) [system] memberchk('_head'=_64206, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Unify: (278) [system] memberchk('_head'=_64206, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (279) [system] nonvar([])
   Exit: (279) [system] nonvar([])
   Exit: (278) [system] memberchk('_head'=_6234, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (278) [system] _65146=['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216]
   Exit: (278) [system] ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216]=['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216]
^  Exit: (277) [user] subst_vars(_head, _6234, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Call: (277) [user] subst_vars([_tail], _64208, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _60470)
^  Unify: (277) [user] subst_vars([_tail], [_tail], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (278) [system] var([_tail])
^  Redo: (277) [user] subst_vars([_tail], _64208, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _60470)
^  Unify: (277) [user] subst_vars([_tail], [_85616|_85618], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _60470)
^  Call: (278) [user] subst_vars(_tail, _85616, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _86556)
^  Unify: (278) [user] subst_vars(_tail, _tail, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (279) [system] var(_tail)
^  Redo: (278) [user] subst_vars(_tail, _85616, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _86556)
^  Unify: (278) [user] subst_vars(_tail, _85616, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _86556)
   Call: (279) [system] nonvar('_tail')
   Exit: (279) [system] nonvar('_tail')
^  Call: (279) [user] svar_fixvarname_dont_capitalize('_tail', _93074)
^  Unify: (279) [user] svar_fixvarname_dont_capitalize('_tail', '_tail')
^  Exit: (279) [user] svar_fixvarname_dont_capitalize('_tail', '_tail')
   Call: (279) [system] memberchk('_tail'=_85616, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Unify: (279) [system] memberchk('_tail'=_85616, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (280) [system] nonvar([])
   Exit: (280) [system] nonvar([])
   Exit: (279) [system] memberchk('_tail'=_6252, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (279) [system] _86556=['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216]
   Exit: (279) [system] ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216]=['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216]
^  Exit: (278) [user] subst_vars(_tail, _6252, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Call: (278) [user] subst_vars([], _85618, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _60470)
^  Unify: (278) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (279) [system] var([])
^  Redo: (278) [user] subst_vars([], _85618, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _60470)
^  Unify: (278) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (278) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (277) [user] subst_vars([_tail], [_6252], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (276) [user] subst_vars([_head, _tail], [_6234, _6252], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Call: (276) [user] subst_vars([[return, _then], [return, _else]], _59532, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _12926)
^  Unify: (276) [user] subst_vars([[return, _then], [return, _else]], [[return, _then], [return, _else]], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (277) [system] var([[return, _then], [return, _else]])
^  Redo: (276) [user] subst_vars([[return, _then], [return, _else]], _59532, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _12926)
^  Unify: (276) [user] subst_vars([[return, _then], [return, _else]], [_114502|_114504], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _12926)
^  Call: (277) [user] subst_vars([return, _then], _114502, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _115442)
^  Unify: (277) [user] subst_vars([return, _then], [return, _then], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (278) [system] var([return, _then])
^  Redo: (277) [user] subst_vars([return, _then], _114502, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _115442)
^  Unify: (277) [user] subst_vars([return, _then], [_119178|_119180], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _115442)
^  Call: (278) [user] subst_vars(return, _119178, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _120118)
^  Unify: (278) [user] subst_vars(return, return, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (279) [system] var(return)
^  Redo: (278) [user] subst_vars(return, _119178, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _120118)
^  Unify: (278) [user] subst_vars(return, _119178, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _120118)
   Call: (279) [system] atom(return)
   Exit: (279) [system] atom(return)
^  Call: (279) [user] symbol_concat($, _126636, return)
^  Unify: (279) [user] symbol_concat($, _126636, return)
   Call: (280) [system] atom_concat($, _126636, return)
   Fail: (280) [system] atom_concat($, _126636, return)
^  Fail: (279) [user] symbol_concat($, _126636, return)
^  Redo: (278) [user] subst_vars(return, _119178, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _120118)
^  Unify: (278) [user] subst_vars(return, _119178, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _120118)
   Call: (279) [system] compound(return)
^  Redo: (278) [user] subst_vars(return, _119178, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _120118)
^  Unify: (278) [user] subst_vars(return, return, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (278) [user] subst_vars(return, return, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Call: (278) [user] subst_vars([_then], _119180, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _115442)
^  Unify: (278) [user] subst_vars([_then], [_then], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (279) [system] var([_then])
^  Redo: (278) [user] subst_vars([_then], _119180, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _115442)
^  Unify: (278) [user] subst_vars([_then], [_140636|_140638], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _115442)
^  Call: (279) [user] subst_vars(_then, _140636, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _141576)
^  Unify: (279) [user] subst_vars(_then, _then, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (280) [system] var(_then)
^  Redo: (279) [user] subst_vars(_then, _140636, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _141576)
^  Unify: (279) [user] subst_vars(_then, _140636, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _141576)
   Call: (280) [system] nonvar('_then')
   Exit: (280) [system] nonvar('_then')
^  Call: (280) [user] svar_fixvarname_dont_capitalize('_then', _148094)
^  Unify: (280) [user] svar_fixvarname_dont_capitalize('_then', '_then')
^  Exit: (280) [user] svar_fixvarname_dont_capitalize('_then', '_then')
   Call: (280) [system] memberchk('_then'=_140636, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Unify: (280) [system] memberchk('_then'=_140636, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (281) [system] nonvar([])
   Exit: (281) [system] nonvar([])
   Exit: (280) [system] memberchk('_then'=_6270, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (280) [system] _141576=['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216]
   Exit: (280) [system] ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216]=['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216]
^  Exit: (279) [user] subst_vars(_then, _6270, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Call: (279) [user] subst_vars([], _140638, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _115442)
^  Unify: (279) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (280) [system] var([])
^  Redo: (279) [user] subst_vars([], _140638, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _115442)
^  Unify: (279) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (279) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (278) [user] subst_vars([_then], [_6270], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (277) [user] subst_vars([return, _then], [return, _6270], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Call: (277) [user] subst_vars([[return, _else]], _114504, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _12926)
^  Unify: (277) [user] subst_vars([[return, _else]], [[return, _else]], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (278) [system] var([[return, _else]])
^  Redo: (277) [user] subst_vars([[return, _else]], _114504, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _12926)
^  Unify: (277) [user] subst_vars([[return, _else]], [_169522|_169524], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _12926)
^  Call: (278) [user] subst_vars([return, _else], _169522, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _170462)
^  Unify: (278) [user] subst_vars([return, _else], [return, _else], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (279) [system] var([return, _else])
^  Redo: (278) [user] subst_vars([return, _else], _169522, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _170462)
^  Unify: (278) [user] subst_vars([return, _else], [_174198|_174200], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _170462)
^  Call: (279) [user] subst_vars(return, _174198, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _175138)
^  Unify: (279) [user] subst_vars(return, return, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (280) [system] var(return)
^  Redo: (279) [user] subst_vars(return, _174198, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _175138)
^  Unify: (279) [user] subst_vars(return, _174198, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _175138)
   Call: (280) [system] atom(return)
   Exit: (280) [system] atom(return)
^  Call: (280) [user] symbol_concat($, _181656, return)
^  Unify: (280) [user] symbol_concat($, _181656, return)
   Call: (281) [system] atom_concat($, _181656, return)
   Fail: (281) [system] atom_concat($, _181656, return)
^  Fail: (280) [user] symbol_concat($, _181656, return)
^  Redo: (279) [user] subst_vars(return, _174198, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _175138)
^  Unify: (279) [user] subst_vars(return, _174198, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _175138)
   Call: (280) [system] compound(return)
^  Redo: (279) [user] subst_vars(return, _174198, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _175138)
^  Unify: (279) [user] subst_vars(return, return, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (279) [user] subst_vars(return, return, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Call: (279) [user] subst_vars([_else], _174200, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _170462)
^  Unify: (279) [user] subst_vars([_else], [_else], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (280) [system] var([_else])
^  Redo: (279) [user] subst_vars([_else], _174200, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _170462)
^  Unify: (279) [user] subst_vars([_else], [_195656|_195658], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _170462)
^  Call: (280) [user] subst_vars(_else, _195656, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _196596)
^  Unify: (280) [user] subst_vars(_else, _else, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (281) [system] var(_else)
^  Redo: (280) [user] subst_vars(_else, _195656, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _196596)
^  Unify: (280) [user] subst_vars(_else, _195656, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _196596)
   Call: (281) [system] nonvar('_else')
   Exit: (281) [system] nonvar('_else')
^  Call: (281) [user] svar_fixvarname_dont_capitalize('_else', _203114)
^  Unify: (281) [user] svar_fixvarname_dont_capitalize('_else', '_else')
^  Exit: (281) [user] svar_fixvarname_dont_capitalize('_else', '_else')
   Call: (281) [system] memberchk('_else'=_195656, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Unify: (281) [system] memberchk('_else'=_195656, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (282) [system] nonvar([])
   Exit: (282) [system] nonvar([])
   Exit: (281) [system] memberchk('_else'=_6288, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (281) [system] _196596=['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216]
   Exit: (281) [system] ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216]=['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216]
^  Exit: (280) [user] subst_vars(_else, _6288, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Call: (280) [user] subst_vars([], _195658, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _170462)
^  Unify: (280) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (281) [system] var([])
^  Redo: (280) [user] subst_vars([], _195658, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _170462)
^  Unify: (280) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (280) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (279) [user] subst_vars([_else], [_6288], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (278) [user] subst_vars([return, _else], [return, _6288], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Call: (278) [user] subst_vars([], _169524, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _12926)
^  Unify: (278) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (279) [system] var([])
^  Redo: (278) [user] subst_vars([], _169524, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _12926)
^  Unify: (278) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (278) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (277) [user] subst_vars([[return, _else]], [[return, _6288]], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (276) [user] subst_vars([[return, _then], [return, _else]], [[return, _6270], [return, _6288]], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (275) [user] subst_vars([[_head, _tail], [return, _then], [return, _else]], [[_6234, _6252], [return, _6270], [return, _6288]], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (274) [user] subst_vars([_list, [_head, _tail], [return, _then], [return, _else]], [_6426, [_6234, _6252], [return, _6270], [return, _6288]], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (273) [user] subst_vars([unify, _list, [_head, _tail], [return, _then], [return, _else]], [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Call: (273) [user] subst_vars([], _11988, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _6394)
^  Unify: (273) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (274) [system] var([])
^  Redo: (273) [user] subst_vars([], _11988, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _6394)
^  Unify: (273) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (273) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (272) [user] subst_vars([[unify, _list, [_head, _tail], [return, _then], [return, _else]]], [[unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (271) [user] subst_vars([_list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]], [_6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]], ['_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (270) [user] subst_vars([['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]], [['decons-atom', _6216], _6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]], ['_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (269) [user] subst_vars([chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]], [chain, ['decons-atom', _6216], _6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]], ['_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Call: (269) [user] subst_vars([], _6392, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _6342)
^  Unify: (269) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (270) [system] var([])
^  Redo: (269) [user] subst_vars([], _6392, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _6342)
^  Unify: (269) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (269) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (268) [user] subst_vars([[chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], [[chain, ['decons-atom', _6216], _6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]]], ['_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (267) [user] subst_vars([[return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], [[return, _6288], [chain, ['decons-atom', _6216], _6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]]], ['_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (266) [user] subst_vars([[], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], [[], [return, _6288], [chain, ['decons-atom', _6216], _6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]]], ['_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (265) [user] subst_vars([_atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], [_6216, [], [return, _6288], [chain, ['decons-atom', _6216], _6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]]], ['_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (264) [user] subst_vars(['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]], ['if-equal', _6216, [], [return, _6288], [chain, ['decons-atom', _6216], _6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]]], ['_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Call: (264) [user] subst_vars([], _6340, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _6326)
^  Unify: (264) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (265) [system] var([])
^  Redo: (264) [user] subst_vars([], _6340, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _6326)
^  Unify: (264) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (264) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (263) [user] subst_vars([['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]], [['if-equal', _6216, [], [return, _6288], [chain, ['decons-atom', _6216], _6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]]]], ['_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (262) [user] subst_vars([eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]], [eval, ['if-equal', _6216, [], [return, _6288], [chain, ['decons-atom', _6216], _6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]]]], ['_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Call: (262) [user] subst_vars([], _6324, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _6310)
^  Unify: (262) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (263) [system] var([])
^  Redo: (262) [user] subst_vars([], _6324, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _6310)
^  Unify: (262) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (262) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (261) [user] subst_vars([[eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]], [[eval, ['if-equal', _6216, [], [return, _6288], [chain, ['decons-atom', _6216], _6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]]]]], ['_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (260) [user] subst_vars([function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]], [function, [eval, ['if-equal', _6216, [], [return, _6288], [chain, ['decons-atom', _6216], _6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]]]]], ['_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Call: (260) [user] subst_vars([], _6308, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _6190)
^  Unify: (260) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (261) [system] var([])
^  Redo: (260) [user] subst_vars([], _6308, ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], _6190)
^  Unify: (260) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (260) [user] subst_vars([], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (259) [user] subst_vars([[function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [[function, [eval, ['if-equal', _6216, [], [return, _6288], [chain, ['decons-atom', _6216], _6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]]]]]], ['_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (258) [user] subst_vars([['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [['if-decons-expr', _6216, _6234, _6252, _6270, _6288], [function, [eval, ['if-equal', _6216, [], [return, _6288], [chain, ['decons-atom', _6216], _6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]]]]]], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
^  Exit: (257) [user] subst_vars([=, ['if-decons-expr', _atom, _head, _tail, _then, _else], [function, [eval, ['if-equal', _atom, [], [return, _else], [chain, ['decons-atom', _atom], _list, [unify, _list, [_head, _tail], [return, _then], [return, _else]]]]]]], [=, ['if-decons-expr', _6216, _6234, _6252, _6270, _6288], [function, [eval, ['if-equal', _6216, [], [return, _6288], [chain, ['decons-atom', _6216], _6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]]]]]], [], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216])
   Call: (257) [system] _274088=metta_file_buffer(+, [=, ['if-decons-expr', _6216, _6234, _6252, _6270, _6288], [function, [eval, ['if-equal', _6216, [], [return, _6288], [chain, ['decons-atom', _6216], _6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]]]]]], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(819, 27, 67, 819))
   Exit: (257) [system] metta_file_buffer(+, [=, ['if-decons-expr', _6216, _6234, _6252, _6270, _6288], [function, [eval, ['if-equal', _6216, [], [return, _6288], [chain, ['decons-atom', _6216], _6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]]]]]], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(819, 27, 67, 819))=metta_file_buffer(+, [=, ['if-decons-expr', _6216, _6234, _6252, _6270, _6288], [function, [eval, ['if-equal', _6216, [], [return, _6288], [chain, ['decons-atom', _6216], _6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]]]]]], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(819, 27, 67, 819))
^  Call: (257) [user] assertz(metta_file_buffer(+, [=, ['if-decons-expr', _6216, _6234, _6252, _6270, _6288], [function, [eval, ['if-equal', _6216, [], [return, _6288], [chain, ['decons-atom', _6216], _6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]]]]]], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(819, 27, 67, 819)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, [=, ['if-decons-expr', _6216, _6234, _6252, _6270, _6288], [function, [eval, ['if-equal', _6216, [], [return, _6288], [chain, ['decons-atom', _6216], _6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]]]]]], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(819, 27, 67, 819)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [=, ['if-decons-expr', _6216, _6234, _6252, _6270, _6288], [function, [eval, ['if-equal', _6216, [], [return, _6288], [chain, ['decons-atom', _6216], _6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]]]]]], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(819, 27, 67, 819))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [=, ['if-decons-expr', _6216, _6234, _6252, _6270, _6288], [function, [eval, ['if-equal', _6216, [], [return, _6288], [chain, ['decons-atom', _6216], _6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]]]]]], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(819, 27, 67, 819))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [=, ['if-decons-expr', _6216, _6234, _6252, _6270, _6288], [function, [eval, ['if-equal', _6216, [], [return, _6288], [chain, ['decons-atom', _6216], _6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]]]]]], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(819, 27, 67, 819))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [=, ['if-decons-expr', _6216, _6234, _6252, _6270, _6288], [function, [eval, ['if-equal', _6216, [], [return, _6288], [chain, ['decons-atom', _6216], _6426, [unify, _6426, [_6234, _6252], [return, _6270], [return, _6288]]]]]]], ['_list'=_6426, '_else'=_6288, '_then'=_6270, '_tail'=_6252, '_head'=_6234, '_atom'=_6216], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(819, 27, 67, 819))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
   Redo: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _324882)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _325820))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _325820)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 1032)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _324882)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _324882)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_324882))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_324882))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_324882))
   Exit: (259) [system] nonvar(position(_324882))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(1032, 32, 69, 1032)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(1032, 32, 69, 1032))
   Call: (257) [user] current_read_mode(file, _345300)
   Unify: (257) [user] current_read_mode(file, _345300)
   Call: (258) [system] nb_current(file_mode, _345300)
   Redo: (257) [user] current_read_mode(file, _345300)
   Call: (258) [system] _345300=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _351750)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _351750)
^  Call: (258) [user] clause(t_l:s_reader_info(_351750), _353696, _353618)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _351750)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _351750)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _351750)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _351750)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _351750)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _351750)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _351750)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _351750)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _367526)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (260) [system] char_type('\n', space)
   Exit: (260) [system] char_type('\n', space)
   Call: (260) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (260) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _351750)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _351750)
   Call: (261) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _351750)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _351750)
   Call: (261) [system] peek_char((0x55aefe44e2f0), _377732)
   Exit: (261) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (261) [system] char_type('\n', space)
   Exit: (261) [system] char_type('\n', space)
   Call: (261) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (261) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _351750)
^  Unify: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _351750)
   Call: (262) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _351750)
^  Unify: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _351750)
   Call: (262) [system] peek_char((0x55aefe44e2f0), _387938)
   Exit: (262) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (262) [system] char_type('(', space)
^  Redo: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _351750)
^  Unify: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _351750)
^  Call: (262) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (262) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (263) [system] string((0x55aefe44e2f0))
^  Redo: (262) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (262) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (262) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _351750)
^  Unify: (262) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _351750)
^  Call: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _351750)
^  Unify: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _351750)
   Call: (264) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _351750)
^  Unify: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _351750)
   Call: (264) [system] peek_char((0x55aefe44e2f0), _403692)
   Exit: (264) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (264) [system] char_type('(', space)
^  Redo: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _351750)
^  Unify: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _351750)
   Call: (264) [system] _408334=(0x55aefe44e2f0)
   Exit: (264) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (264) [user] once((read_position((0x55aefe44e2f0), _410202, _410204, _410206, _410208), read_sexpr((0x55aefe44e2f0), _410220), assertz(metta_file_comment(_410202, _410204, _410206, _410220, _410208))))
^  Unify: (264) [system] once(user:(read_position((0x55aefe44e2f0), _410202, _410204, _410206, _410208), read_sexpr((0x55aefe44e2f0), _410220), assertz(metta_file_comment(_410202, _410204, _410206, _410220, _410208))))
^  Call: (266) [user] read_position((0x55aefe44e2f0), _410202, _410204, _410206, _410208)
^  Unify: (266) [user] read_position((0x55aefe44e2f0), _410202, _410204, _410206, _410208)
   Call: (267) [system] stream_property((0x55aefe44e2f0), position(_410208))
   Unify: (267) [system] stream_property((0x55aefe44e2f0), position(_410208))
   Call: (268) [system] nonvar((0x55aefe44e2f0))
   Exit: (268) [system] nonvar((0x55aefe44e2f0))
   Call: (268) [system] nonvar(position(_410208))
   Exit: (268) [system] nonvar(position(_410208))
   Exit: (267) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(1034, 34, 0, 1034)))
   Call: (267) [$syspreds] stream_position_data(line_count, '$stream_position'(1034, 34, 0, 1034), _410202)
   Unify: (267) [$syspreds] stream_position_data(line_count, '$stream_position'(1034, 34, 0, 1034), _410202)
   Call: (268) [system] nonvar(line_count)
   Exit: (268) [system] nonvar(line_count)
   Call: (268) [$syspreds] stream_position_field(line_count, _424190)
   Unify: (268) [$syspreds] stream_position_field(line_count, 2)
   Exit: (268) [$syspreds] stream_position_field(line_count, 2)
   Call: (268) [system] arg(2, '$stream_position'(1034, 34, 0, 1034), _410202)
   Exit: (268) [system] arg(2, '$stream_position'(1034, 34, 0, 1034), 34)
   Exit: (267) [$syspreds] stream_position_data(line_count, '$stream_position'(1034, 34, 0, 1034), 34)
   Call: (267) [$syspreds] stream_position_data(line_position, '$stream_position'(1034, 34, 0, 1034), _410204)
   Unify: (267) [$syspreds] stream_position_data(line_position, '$stream_position'(1034, 34, 0, 1034), _410204)
   Call: (268) [system] nonvar(line_position)
   Exit: (268) [system] nonvar(line_position)
   Call: (268) [$syspreds] stream_position_field(line_position, _433484)
   Unify: (268) [$syspreds] stream_position_field(line_position, 3)
   Exit: (268) [$syspreds] stream_position_field(line_position, 3)
   Call: (268) [system] arg(3, '$stream_position'(1034, 34, 0, 1034), _410204)
   Exit: (268) [system] arg(3, '$stream_position'(1034, 34, 0, 1034), 0)
   Exit: (267) [$syspreds] stream_position_data(line_position, '$stream_position'(1034, 34, 0, 1034), 0)
   Call: (267) [$syspreds] stream_position_data(char_count, '$stream_position'(1034, 34, 0, 1034), _410206)
   Unify: (267) [$syspreds] stream_position_data(char_count, '$stream_position'(1034, 34, 0, 1034), _410206)
   Call: (268) [system] nonvar(char_count)
   Exit: (268) [system] nonvar(char_count)
   Call: (268) [$syspreds] stream_position_field(char_count, _442778)
   Unify: (268) [$syspreds] stream_position_field(char_count, 1)
   Exit: (268) [$syspreds] stream_position_field(char_count, 1)
   Call: (268) [system] arg(1, '$stream_position'(1034, 34, 0, 1034), _410206)
   Exit: (268) [system] arg(1, '$stream_position'(1034, 34, 0, 1034), 1034)
   Exit: (267) [$syspreds] stream_position_data(char_count, '$stream_position'(1034, 34, 0, 1034), 1034)
^  Exit: (266) [user] read_position((0x55aefe44e2f0), 34, 0, 1034, '$stream_position'(1034, 34, 0, 1034))
^  Call: (266) [user] read_sexpr((0x55aefe44e2f0), _410220)
^  Unify: (266) [user] read_sexpr((0x55aefe44e2f0), _410220)
   Call: (267) [system] string((0x55aefe44e2f0))
^  Redo: (266) [user] read_sexpr((0x55aefe44e2f0), _410220)
^  Unify: (266) [user] read_sexpr((0x55aefe44e2f0), _410220)
^  Call: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), _410220)
^  Unify: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), _410220)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _457648)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (269) [system] '('=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', 'white')
^  Redo: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', end_of_line)
^  Redo: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', space)
^  Redo: (269) [user] is_like_space('(')
^  Unify: (269) [user] is_like_space('(')
   Call: (270) [system] char_type('(', cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] get_char((0x55aefe44e2f0), _474432)
   Exit: (268) [system] get_char((0x55aefe44e2f0), '(')
   Call: (268) [system] '('='('
   Exit: (268) [system] '('='('
^  Call: (268) [user] read_list(')', (0x55aefe44e2f0), _410220)
^  Unify: (268) [user] read_list(')', (0x55aefe44e2f0), _410220)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _481858)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, 'white')
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, end_of_line)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, space)
^  Redo: (270) [user] is_like_space(:)
^  Unify: (270) [user] is_like_space(:)
   Call: (271) [system] char_type(:, cntrl)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _498642)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), :)
   Call: (269) [system] (:)=')'
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _410220)
   Call: (269) [system] (:)=end_of_file
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _410220)
^  Call: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _504220)
^  Unify: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _504220)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _507934)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), :)
   Call: (271) [system] (:)=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(:)
^  Unify: (271) [user] is_like_space(:)
   Call: (272) [system] char_type(:, 'white')
^  Redo: (271) [user] is_like_space(:)
^  Unify: (271) [user] is_like_space(:)
   Call: (272) [system] char_type(:, end_of_line)
^  Redo: (271) [user] is_like_space(:)
^  Unify: (271) [user] is_like_space(:)
   Call: (272) [system] char_type(:, space)
^  Redo: (271) [user] is_like_space(:)
^  Unify: (271) [user] is_like_space(:)
   Call: (272) [system] char_type(:, cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] get_char((0x55aefe44e2f0), _6732)
   Exit: (270) [system] get_char((0x55aefe44e2f0), :)
   Call: (270) [system] (:)='('
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5982)
   Call: (270) [system] (:)='['
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5982)
   Call: (270) [system] (:)='{'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5982)
   Call: (270) [system] (:)='"'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5982)
   Call: (270) [system] (:)=!
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5982)
   Call: (270) [system] (:)='\''
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5982)
   Call: (270) [system] (:)='`'
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5982)
   Call: (270) [system] (:)=end_of_file
^  Redo: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _5982)
^  Call: (270) [user] read_symbolic(')', (0x55aefe44e2f0), :, _5982)
^  Unify: (270) [user] read_symbolic(')', (0x55aefe44e2f0), :, _5982)
^  Call: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _25342)
^  Unify: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _25342)
   Call: (272) [system] peek_char((0x55aefe44e2f0), _27208)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (272) [user] is_delimiter(' ')
^  Unify: (272) [user] is_delimiter(' ')
   Call: (273) [system] char_type(' ', space)
   Exit: (273) [system] char_type(' ', space)
^  Exit: (272) [user] is_delimiter(' ')
   Call: (272) [system] _25342=[]
   Exit: (272) [system] []=[]
^  Exit: (271) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (271) [user] classify_and_convert_charseq(:, [], _5982)
^  Unify: (271) [user] classify_and_convert_charseq(:, [], _5982)
^  Call: (273) [system] setup_call_cleanup('$notrace'(_38374, _38376), once(user:catch(read_from_chars([:], _5982), _38350, fail)), '$restore_trace'(_38374, _38376))
^  Unify: (273) [system] setup_call_cleanup(system:'$notrace'(_38374, _38376), system:once(user:catch(read_from_chars([:], _5982), _38350, fail)), system:'$restore_trace'(_38374, _38376))
^  Call: (274) [system] sig_atomic(system:'$notrace'(_38374, _38376))
^  Exit: (273) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([:], :), _38350, fail)), system:'$restore_trace'(3, -1))
   Call: (272) [system] atomic(:)
   Exit: (272) [system] atomic(:)
^  Exit: (271) [user] classify_and_convert_charseq(:, [], :)
^  Exit: (270) [user] read_symbolic(')', (0x55aefe44e2f0), :, :)
^  Exit: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), :)
^  Call: (269) [user] read_list(')', (0x55aefe44e2f0), _46812)
^  Unify: (269) [user] read_list(')', (0x55aefe44e2f0), _46812)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _50526)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (271) [system] ' '=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space(' ')
^  Unify: (271) [user] is_like_space(' ')
   Call: (272) [system] char_type(' ', 'white')
   Exit: (272) [system] char_type(' ', 'white')
^  Exit: (271) [user] is_like_space(' ')
   Call: (271) [system] get_char((0x55aefe44e2f0), _59184)
   Exit: (271) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _62812)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), i)
   Call: (272) [system] i=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, 'white')
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, end_of_line)
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, space)
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _80520)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), i)
   Call: (270) [system] i=')'
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _46812)
   Call: (270) [system] i=end_of_file
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _46812)
^  Call: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _86098)
^  Unify: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _86098)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _89812)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), i)
   Call: (272) [system] i=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, 'white')
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, end_of_line)
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, space)
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] get_char((0x55aefe44e2f0), _106596)
   Exit: (271) [system] get_char((0x55aefe44e2f0), i)
   Call: (271) [system] i='('
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _86098)
   Call: (271) [system] i='['
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _86098)
   Call: (271) [system] i='{'
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _86098)
   Call: (271) [system] i='"'
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _86098)
   Call: (271) [system] i=!
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _86098)
   Call: (271) [system] i='\''
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _86098)
   Call: (271) [system] i='`'
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _86098)
   Call: (271) [system] i=end_of_file
^  Redo: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _86098)
^  Call: (271) [user] read_symbolic(')', (0x55aefe44e2f0), i, _86098)
^  Unify: (271) [user] read_symbolic(')', (0x55aefe44e2f0), i, _86098)
^  Call: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _125206)
^  Unify: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _125206)
   Call: (273) [system] peek_char((0x55aefe44e2f0), _127072)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), f)
^  Call: (273) [user] is_delimiter(f)
^  Unify: (273) [user] is_delimiter(f)
   Call: (274) [system] char_type(f, space)
^  Redo: (273) [user] is_delimiter(f)
   Call: (274) [system] arg(_132712, v('(', ')', end_of_file), f)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _125206)
   Call: (273) [system] ')'==f
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _125206)
   Call: (273) [system] get_char((0x55aefe44e2f0), f)
   Exit: (273) [system] get_char((0x55aefe44e2f0), f)
   Call: (273) [system] f=(\)
^  Redo: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _125206)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _140078)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _140078)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _141944)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), -)
^  Call: (274) [user] is_delimiter(-)
^  Unify: (274) [user] is_delimiter(-)
   Call: (275) [system] char_type(-, space)
^  Redo: (274) [user] is_delimiter(-)
   Call: (275) [system] arg(_147584, v('(', ')', end_of_file), -)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _140078)
   Call: (274) [system] ')'==(-)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _140078)
   Call: (274) [system] get_char((0x55aefe44e2f0), -)
   Exit: (274) [system] get_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _140078)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _154950)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _154950)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _156816)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (275) [user] is_delimiter(e)
^  Unify: (275) [user] is_delimiter(e)
   Call: (276) [system] char_type(e, space)
^  Redo: (275) [user] is_delimiter(e)
   Call: (276) [system] arg(_162456, v('(', ')', end_of_file), e)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _154950)
   Call: (275) [system] ')'==e
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _154950)
   Call: (275) [system] get_char((0x55aefe44e2f0), e)
   Exit: (275) [system] get_char((0x55aefe44e2f0), e)
   Call: (275) [system] e=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _154950)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169822)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169822)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _171688)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (276) [user] is_delimiter(r)
^  Unify: (276) [user] is_delimiter(r)
   Call: (277) [system] char_type(r, space)
^  Redo: (276) [user] is_delimiter(r)
   Call: (277) [system] arg(_177328, v('(', ')', end_of_file), r)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169822)
   Call: (276) [system] ')'==r
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169822)
   Call: (276) [system] get_char((0x55aefe44e2f0), r)
   Exit: (276) [system] get_char((0x55aefe44e2f0), r)
   Call: (276) [system] r=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169822)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _184694)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _184694)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _186560)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (277) [user] is_delimiter(r)
^  Unify: (277) [user] is_delimiter(r)
   Call: (278) [system] char_type(r, space)
^  Redo: (277) [user] is_delimiter(r)
   Call: (278) [system] arg(_192200, v('(', ')', end_of_file), r)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _184694)
   Call: (277) [system] ')'==r
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _184694)
   Call: (277) [system] get_char((0x55aefe44e2f0), r)
   Exit: (277) [system] get_char((0x55aefe44e2f0), r)
   Call: (277) [system] r=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _184694)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _199566)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _199566)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _201432)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (278) [user] is_delimiter(o)
^  Unify: (278) [user] is_delimiter(o)
   Call: (279) [system] char_type(o, space)
^  Redo: (278) [user] is_delimiter(o)
   Call: (279) [system] arg(_207072, v('(', ')', end_of_file), o)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _199566)
   Call: (278) [system] ')'==o
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _199566)
   Call: (278) [system] get_char((0x55aefe44e2f0), o)
   Exit: (278) [system] get_char((0x55aefe44e2f0), o)
   Call: (278) [system] o=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _199566)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _214438)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _214438)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _216304)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (279) [user] is_delimiter(r)
^  Unify: (279) [user] is_delimiter(r)
   Call: (280) [system] char_type(r, space)
^  Redo: (279) [user] is_delimiter(r)
   Call: (280) [system] arg(_221944, v('(', ')', end_of_file), r)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _214438)
   Call: (279) [system] ')'==r
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _214438)
   Call: (279) [system] get_char((0x55aefe44e2f0), r)
   Exit: (279) [system] get_char((0x55aefe44e2f0), r)
   Call: (279) [system] r=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _214438)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _229310)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _229310)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _231176)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (280) [user] is_delimiter(' ')
^  Unify: (280) [user] is_delimiter(' ')
   Call: (281) [system] char_type(' ', space)
   Exit: (281) [system] char_type(' ', space)
^  Exit: (280) [user] is_delimiter(' ')
   Call: (280) [system] _229310=[]
   Exit: (280) [system] []=[]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (279) [system] _214438=[r]
   Exit: (279) [system] [r]=[r]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r])
   Call: (278) [system] _199566=[o, r]
   Exit: (278) [system] [o, r]=[o, r]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, r])
   Call: (277) [system] _184694=[r, o, r]
   Exit: (277) [system] [r, o, r]=[r, o, r]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, o, r])
   Call: (276) [system] _169822=[r, r, o, r]
   Exit: (276) [system] [r, r, o, r]=[r, r, o, r]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, r, o, r])
   Call: (275) [system] _154950=[e, r, r, o, r]
   Exit: (275) [system] [e, r, r, o, r]=[e, r, r, o, r]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, r, r, o, r])
   Call: (274) [system] _140078=[-, e, r, r, o, r]
   Exit: (274) [system] [-, e, r, r, o, r]=[-, e, r, r, o, r]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [-, e, r, r, o, r])
   Call: (273) [system] _125206=[f, -, e, r, r, o, r]
   Exit: (273) [system] [f, -, e, r, r, o, r]=[f, -, e, r, r, o, r]
^  Exit: (272) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [f, -, e, r, r, o, r])
^  Call: (272) [user] classify_and_convert_charseq(i, [f, -, e, r, r, o, r], _86098)
^  Unify: (272) [user] classify_and_convert_charseq(i, [f, -, e, r, r, o, r], _86098)
^  Call: (274) [system] setup_call_cleanup('$notrace'(_261900, _261902), once(user:catch(read_from_chars([i, f, -, e, r, r, o, r], _86098), _261876, fail)), '$restore_trace'(_261900, _261902))
^  Unify: (274) [system] setup_call_cleanup(system:'$notrace'(_261900, _261902), system:once(user:catch(read_from_chars([i, f, -, e, r, r, o, r], _86098), _261876, fail)), system:'$restore_trace'(_261900, _261902))
^  Call: (275) [system] sig_atomic(system:'$notrace'(_261900, _261902))
^  Exit: (274) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([i, f, -, e, r, r, o, r], if-error), _261876, fail)), system:'$restore_trace'(3, -1))
   Call: (273) [system] atomic(if-error)
^  Redo: (272) [user] classify_and_convert_charseq(i, [f, -, e, r, r, o, r], _86098)
^  Unify: (272) [user] classify_and_convert_charseq(i, [f, -, e, r, r, o, r], _86098)
   Call: (273) [system] atom_chars(_86098, [i, f, -, e, r, r, o, r])
   Exit: (273) [system] atom_chars('if-error', [i, f, -, e, r, r, o, r])
^  Exit: (272) [user] classify_and_convert_charseq(i, [f, -, e, r, r, o, r], 'if-error')
^  Exit: (271) [user] read_symbolic(')', (0x55aefe44e2f0), i, 'if-error')
^  Exit: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), 'if-error')
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _273146)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _273146)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _276860)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (272) [system] ' '=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(' ')
^  Unify: (272) [user] is_like_space(' ')
   Call: (273) [system] char_type(' ', 'white')
   Exit: (273) [system] char_type(' ', 'white')
^  Exit: (272) [user] is_like_space(' ')
   Call: (272) [system] get_char((0x55aefe44e2f0), _285518)
   Exit: (272) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _289146)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (273) [system] '('=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', 'white')
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', end_of_line)
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', space)
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _306854)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('=')'
^  Redo: (270) [user] read_list(')', (0x55aefe44e2f0), _273146)
   Call: (271) [system] '('=end_of_file
^  Redo: (270) [user] read_list(')', (0x55aefe44e2f0), _273146)
^  Call: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _312432)
^  Unify: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _312432)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _316146)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (273) [system] '('=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', 'white')
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', end_of_line)
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', space)
^  Redo: (273) [user] is_like_space('(')
^  Unify: (273) [user] is_like_space('(')
   Call: (274) [system] char_type('(', cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] get_char((0x55aefe44e2f0), _332930)
   Exit: (272) [system] get_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('='('
   Exit: (272) [system] '('='('
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _312432)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _312432)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _340356)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, 'white')
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, end_of_line)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, space)
^  Redo: (274) [user] is_like_space(-)
^  Unify: (274) [user] is_like_space(-)
   Call: (275) [system] char_type(-, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _357140)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), -)
   Call: (273) [system] (-)=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _312432)
   Call: (273) [system] (-)=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _312432)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _362718)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _362718)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _366432)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), -)
   Call: (275) [system] (-)=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(-)
^  Unify: (275) [user] is_like_space(-)
   Call: (276) [system] char_type(-, 'white')
^  Redo: (275) [user] is_like_space(-)
^  Unify: (275) [user] is_like_space(-)
   Call: (276) [system] char_type(-, end_of_line)
^  Redo: (275) [user] is_like_space(-)
^  Unify: (275) [user] is_like_space(-)
   Call: (276) [system] char_type(-, space)
^  Redo: (275) [user] is_like_space(-)
^  Unify: (275) [user] is_like_space(-)
   Call: (276) [system] char_type(-, cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _383216)
   Exit: (274) [system] get_char((0x55aefe44e2f0), -)
   Call: (274) [system] (-)='('
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _362718)
   Call: (274) [system] (-)='['
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _362718)
   Call: (274) [system] (-)='{'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _362718)
   Call: (274) [system] (-)='"'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _362718)
   Call: (274) [system] (-)=!
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _362718)
   Call: (274) [system] (-)='\''
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _362718)
   Call: (274) [system] (-)='`'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _362718)
   Call: (274) [system] (-)=end_of_file
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _362718)
^  Call: (274) [user] read_symbolic(')', (0x55aefe44e2f0), -, _362718)
^  Unify: (274) [user] read_symbolic(')', (0x55aefe44e2f0), -, _362718)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _401826)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _401826)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _403692)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), >)
^  Call: (276) [user] is_delimiter(>)
^  Unify: (276) [user] is_delimiter(>)
   Call: (277) [system] char_type(>, space)
^  Redo: (276) [user] is_delimiter(>)
   Call: (277) [system] arg(_409332, v('(', ')', end_of_file), >)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _401826)
   Call: (276) [system] ')'==(>)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _401826)
   Call: (276) [system] get_char((0x55aefe44e2f0), >)
   Exit: (276) [system] get_char((0x55aefe44e2f0), >)
   Call: (276) [system] (>)=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _401826)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _416698)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _416698)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _418564)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (277) [user] is_delimiter(' ')
^  Unify: (277) [user] is_delimiter(' ')
   Call: (278) [system] char_type(' ', space)
   Exit: (278) [system] char_type(' ', space)
^  Exit: (277) [user] is_delimiter(' ')
   Call: (277) [system] _416698=[]
   Exit: (277) [system] []=[]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (276) [system] _401826=[>]
   Exit: (276) [system] [>]=[>]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [>])
^  Call: (275) [user] classify_and_convert_charseq(-, [>], _362718)
^  Unify: (275) [user] classify_and_convert_charseq(-, [>], _362718)
^  Call: (277) [system] setup_call_cleanup('$notrace'(_432524, _432526), once(user:catch(read_from_chars([-, >], _362718), _432500, fail)), '$restore_trace'(_432524, _432526))
^  Unify: (277) [system] setup_call_cleanup(system:'$notrace'(_432524, _432526), system:once(user:catch(read_from_chars([-, >], _362718), _432500, fail)), system:'$restore_trace'(_432524, _432526))
^  Call: (278) [system] sig_atomic(system:'$notrace'(_432524, _432526))
^  Exit: (277) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([-, >], ->), _432500, fail)), system:'$restore_trace'(3, -1))
   Call: (276) [system] atomic(->)
   Exit: (276) [system] atomic(->)
^  Exit: (275) [user] classify_and_convert_charseq(-, [>], ->)
^  Exit: (274) [user] read_symbolic(')', (0x55aefe44e2f0), -, ->)
^  Exit: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), ->)
^  Call: (273) [user] read_list(')', (0x55aefe44e2f0), _440962)
^  Unify: (273) [user] read_list(')', (0x55aefe44e2f0), _440962)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _444676)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (275) [system] ' '=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(' ')
^  Unify: (275) [user] is_like_space(' ')
   Call: (276) [system] char_type(' ', 'white')
   Exit: (276) [system] char_type(' ', 'white')
^  Exit: (275) [user] is_like_space(' ')
   Call: (275) [system] get_char((0x55aefe44e2f0), _453334)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _456962)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _474670)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (274) [system] 'A'=')'
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _440962)
   Call: (274) [system] 'A'=end_of_file
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _440962)
^  Call: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _480248)
^  Unify: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _480248)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _483962)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', 'white')
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', end_of_line)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', space)
^  Redo: (276) [user] is_like_space('A')
^  Unify: (276) [user] is_like_space('A')
   Call: (277) [system] char_type('A', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] get_char((0x55aefe44e2f0), _500746)
   Exit: (275) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'='('
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _480248)
   Call: (275) [system] 'A'='['
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _480248)
   Call: (275) [system] 'A'='{'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _480248)
   Call: (275) [system] 'A'='"'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _480248)
   Call: (275) [system] 'A'=!
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _480248)
   Call: (275) [system] 'A'='\''
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _480248)
   Call: (275) [system] 'A'='`'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _480248)
   Call: (275) [system] 'A'=end_of_file
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _480248)
^  Call: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _480248)
^  Unify: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _480248)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _519356)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _519356)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _521222)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (277) [user] is_delimiter(t)
^  Unify: (277) [user] is_delimiter(t)
   Call: (278) [system] char_type(t, space)
^  Redo: (277) [user] is_delimiter(t)
   Call: (278) [system] arg(_8822, v('(', ')', end_of_file), t)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6010)
   Call: (277) [system] ')'==t
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6010)
   Call: (277) [system] get_char((0x55aefe44e2f0), t)
   Exit: (277) [system] get_char((0x55aefe44e2f0), t)
   Call: (277) [system] t=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6010)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _16188)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _16188)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _18054)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (278) [user] is_delimiter(o)
^  Unify: (278) [user] is_delimiter(o)
   Call: (279) [system] char_type(o, space)
^  Redo: (278) [user] is_delimiter(o)
   Call: (279) [system] arg(_23694, v('(', ')', end_of_file), o)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _16188)
   Call: (278) [system] ')'==o
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _16188)
   Call: (278) [system] get_char((0x55aefe44e2f0), o)
   Exit: (278) [system] get_char((0x55aefe44e2f0), o)
   Call: (278) [system] o=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _16188)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31060)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31060)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _32926)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (279) [user] is_delimiter(m)
^  Unify: (279) [user] is_delimiter(m)
   Call: (280) [system] char_type(m, space)
^  Redo: (279) [user] is_delimiter(m)
   Call: (280) [system] arg(_38566, v('(', ')', end_of_file), m)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31060)
   Call: (279) [system] ')'==m
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31060)
   Call: (279) [system] get_char((0x55aefe44e2f0), m)
   Exit: (279) [system] get_char((0x55aefe44e2f0), m)
   Call: (279) [system] m=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31060)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _45932)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _45932)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _47798)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (280) [user] is_delimiter(' ')
^  Unify: (280) [user] is_delimiter(' ')
   Call: (281) [system] char_type(' ', space)
   Exit: (281) [system] char_type(' ', space)
^  Exit: (280) [user] is_delimiter(' ')
   Call: (280) [system] _45932=[]
   Exit: (280) [system] []=[]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (279) [system] _31060=[m]
   Exit: (279) [system] [m]=[m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (278) [system] _16188=[o, m]
   Exit: (278) [system] [o, m]=[o, m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (277) [system] _6010=[t, o, m]
   Exit: (277) [system] [t, o, m]=[t, o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (276) [user] classify_and_convert_charseq('A', [t, o, m], _6006)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _6006)
^  Call: (278) [system] setup_call_cleanup('$notrace'(_67346, _67348), once(user:catch(read_from_chars(['A', t, o, m], _6006), _67322, fail)), '$restore_trace'(_67346, _67348))
^  Unify: (278) [system] setup_call_cleanup(system:'$notrace'(_67346, _67348), system:once(user:catch(read_from_chars(['A', t, o, m], _6006), _67322, fail)), system:'$restore_trace'(_67346, _67348))
^  Call: (279) [system] sig_atomic(system:'$notrace'(_67346, _67348))
^  Exit: (278) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _6006), _67322, fail)), system:'$restore_trace'(3, -1))
   Call: (277) [system] atomic(_6006)
^  Redo: (276) [user] classify_and_convert_charseq('A', [t, o, m], _6006)
^  Unify: (276) [user] classify_and_convert_charseq('A', [t, o, m], _6006)
   Call: (277) [system] atom_chars(_6006, ['A', t, o, m])
   Exit: (277) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (276) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (275) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _78600)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _78600)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _82314)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (276) [system] ' '=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(' ')
^  Unify: (276) [user] is_like_space(' ')
   Call: (277) [system] char_type(' ', 'white')
   Exit: (277) [system] char_type(' ', 'white')
^  Exit: (276) [user] is_like_space(' ')
   Call: (276) [system] get_char((0x55aefe44e2f0), _90972)
   Exit: (276) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _94600)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (277) [system] 'A'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', 'white')
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', end_of_line)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', space)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _112308)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (275) [system] 'A'=')'
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _78600)
   Call: (275) [system] 'A'=end_of_file
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _78600)
^  Call: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _117886)
^  Unify: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _117886)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _121600)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (277) [system] 'A'=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', 'white')
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', end_of_line)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', space)
^  Redo: (277) [user] is_like_space('A')
^  Unify: (277) [user] is_like_space('A')
   Call: (278) [system] char_type('A', cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] get_char((0x55aefe44e2f0), _138384)
   Exit: (276) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'='('
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _117886)
   Call: (276) [system] 'A'='['
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _117886)
   Call: (276) [system] 'A'='{'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _117886)
   Call: (276) [system] 'A'='"'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _117886)
   Call: (276) [system] 'A'=!
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _117886)
   Call: (276) [system] 'A'='\''
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _117886)
   Call: (276) [system] 'A'='`'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _117886)
   Call: (276) [system] 'A'=end_of_file
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _117886)
^  Call: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _117886)
^  Unify: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _117886)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _156994)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _156994)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _158860)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (278) [user] is_delimiter(t)
^  Unify: (278) [user] is_delimiter(t)
   Call: (279) [system] char_type(t, space)
^  Redo: (278) [user] is_delimiter(t)
   Call: (279) [system] arg(_164500, v('(', ')', end_of_file), t)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _156994)
   Call: (278) [system] ')'==t
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _156994)
   Call: (278) [system] get_char((0x55aefe44e2f0), t)
   Exit: (278) [system] get_char((0x55aefe44e2f0), t)
   Call: (278) [system] t=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _156994)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _171866)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _171866)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _173732)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (279) [user] is_delimiter(o)
^  Unify: (279) [user] is_delimiter(o)
   Call: (280) [system] char_type(o, space)
^  Redo: (279) [user] is_delimiter(o)
   Call: (280) [system] arg(_179372, v('(', ')', end_of_file), o)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _171866)
   Call: (279) [system] ')'==o
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _171866)
   Call: (279) [system] get_char((0x55aefe44e2f0), o)
   Exit: (279) [system] get_char((0x55aefe44e2f0), o)
   Call: (279) [system] o=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _171866)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _186738)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _186738)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _188604)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (280) [user] is_delimiter(m)
^  Unify: (280) [user] is_delimiter(m)
   Call: (281) [system] char_type(m, space)
^  Redo: (280) [user] is_delimiter(m)
   Call: (281) [system] arg(_194244, v('(', ')', end_of_file), m)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _186738)
   Call: (280) [system] ')'==m
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _186738)
   Call: (280) [system] get_char((0x55aefe44e2f0), m)
   Exit: (280) [system] get_char((0x55aefe44e2f0), m)
   Call: (280) [system] m=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _186738)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _201610)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _201610)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _203476)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (281) [user] is_delimiter(' ')
^  Unify: (281) [user] is_delimiter(' ')
   Call: (282) [system] char_type(' ', space)
   Exit: (282) [system] char_type(' ', space)
^  Exit: (281) [user] is_delimiter(' ')
   Call: (281) [system] _201610=[]
   Exit: (281) [system] []=[]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (280) [system] _186738=[m]
   Exit: (280) [system] [m]=[m]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (279) [system] _171866=[o, m]
   Exit: (279) [system] [o, m]=[o, m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (278) [system] _156994=[t, o, m]
   Exit: (278) [system] [t, o, m]=[t, o, m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (277) [user] classify_and_convert_charseq('A', [t, o, m], _117886)
^  Unify: (277) [user] classify_and_convert_charseq('A', [t, o, m], _117886)
^  Call: (279) [system] setup_call_cleanup('$notrace'(_223024, _223026), once(user:catch(read_from_chars(['A', t, o, m], _117886), _223000, fail)), '$restore_trace'(_223024, _223026))
^  Unify: (279) [system] setup_call_cleanup(system:'$notrace'(_223024, _223026), system:once(user:catch(read_from_chars(['A', t, o, m], _117886), _223000, fail)), system:'$restore_trace'(_223024, _223026))
^  Call: (280) [system] sig_atomic(system:'$notrace'(_223024, _223026))
^  Exit: (279) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _117886), _223000, fail)), system:'$restore_trace'(3, -1))
   Call: (278) [system] atomic(_117886)
^  Redo: (277) [user] classify_and_convert_charseq('A', [t, o, m], _117886)
^  Unify: (277) [user] classify_and_convert_charseq('A', [t, o, m], _117886)
   Call: (278) [system] atom_chars(_117886, ['A', t, o, m])
   Exit: (278) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (277) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (276) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (275) [user] read_list(')', (0x55aefe44e2f0), _234278)
^  Unify: (275) [user] read_list(')', (0x55aefe44e2f0), _234278)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _237992)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (277) [system] ' '=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space(' ')
^  Unify: (277) [user] is_like_space(' ')
   Call: (278) [system] char_type(' ', 'white')
   Exit: (278) [system] char_type(' ', 'white')
^  Exit: (277) [user] is_like_space(' ')
   Call: (277) [system] get_char((0x55aefe44e2f0), _246650)
   Exit: (277) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _250278)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (278) [system] 'A'=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', 'white')
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', end_of_line)
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', space)
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', cntrl)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _267986)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (276) [system] 'A'=')'
^  Redo: (275) [user] read_list(')', (0x55aefe44e2f0), _234278)
   Call: (276) [system] 'A'=end_of_file
^  Redo: (275) [user] read_list(')', (0x55aefe44e2f0), _234278)
^  Call: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _273564)
^  Unify: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _273564)
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _277278)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (278) [system] 'A'=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', 'white')
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', end_of_line)
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', space)
^  Redo: (278) [user] is_like_space('A')
^  Unify: (278) [user] is_like_space('A')
   Call: (279) [system] char_type('A', cntrl)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] get_char((0x55aefe44e2f0), _294062)
   Exit: (277) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (277) [system] 'A'='('
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _273564)
   Call: (277) [system] 'A'='['
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _273564)
   Call: (277) [system] 'A'='{'
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _273564)
   Call: (277) [system] 'A'='"'
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _273564)
   Call: (277) [system] 'A'=!
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _273564)
   Call: (277) [system] 'A'='\''
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _273564)
   Call: (277) [system] 'A'='`'
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _273564)
   Call: (277) [system] 'A'=end_of_file
^  Redo: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _273564)
^  Call: (277) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _273564)
^  Unify: (277) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _273564)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _312672)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _312672)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _314538)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (279) [user] is_delimiter(t)
^  Unify: (279) [user] is_delimiter(t)
   Call: (280) [system] char_type(t, space)
^  Redo: (279) [user] is_delimiter(t)
   Call: (280) [system] arg(_320178, v('(', ')', end_of_file), t)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _312672)
   Call: (279) [system] ')'==t
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _312672)
   Call: (279) [system] get_char((0x55aefe44e2f0), t)
   Exit: (279) [system] get_char((0x55aefe44e2f0), t)
   Call: (279) [system] t=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _312672)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _327544)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _327544)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _329410)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (280) [user] is_delimiter(o)
^  Unify: (280) [user] is_delimiter(o)
   Call: (281) [system] char_type(o, space)
^  Redo: (280) [user] is_delimiter(o)
   Call: (281) [system] arg(_335050, v('(', ')', end_of_file), o)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _327544)
   Call: (280) [system] ')'==o
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _327544)
   Call: (280) [system] get_char((0x55aefe44e2f0), o)
   Exit: (280) [system] get_char((0x55aefe44e2f0), o)
   Call: (280) [system] o=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _327544)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _342416)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _342416)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _344282)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (281) [user] is_delimiter(m)
^  Unify: (281) [user] is_delimiter(m)
   Call: (282) [system] char_type(m, space)
^  Redo: (281) [user] is_delimiter(m)
   Call: (282) [system] arg(_349922, v('(', ')', end_of_file), m)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _342416)
   Call: (281) [system] ')'==m
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _342416)
   Call: (281) [system] get_char((0x55aefe44e2f0), m)
   Exit: (281) [system] get_char((0x55aefe44e2f0), m)
   Call: (281) [system] m=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _342416)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _357288)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _357288)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _359154)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (282) [user] is_delimiter(' ')
^  Unify: (282) [user] is_delimiter(' ')
   Call: (283) [system] char_type(' ', space)
   Exit: (283) [system] char_type(' ', space)
^  Exit: (282) [user] is_delimiter(' ')
   Call: (282) [system] _357288=[]
   Exit: (282) [system] []=[]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (281) [system] _342416=[m]
   Exit: (281) [system] [m]=[m]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (280) [system] _327544=[o, m]
   Exit: (280) [system] [o, m]=[o, m]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (279) [system] _312672=[t, o, m]
   Exit: (279) [system] [t, o, m]=[t, o, m]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (278) [user] classify_and_convert_charseq('A', [t, o, m], _273564)
^  Unify: (278) [user] classify_and_convert_charseq('A', [t, o, m], _273564)
^  Call: (280) [system] setup_call_cleanup('$notrace'(_378702, _378704), once(user:catch(read_from_chars(['A', t, o, m], _273564), _378678, fail)), '$restore_trace'(_378702, _378704))
^  Unify: (280) [system] setup_call_cleanup(system:'$notrace'(_378702, _378704), system:once(user:catch(read_from_chars(['A', t, o, m], _273564), _378678, fail)), system:'$restore_trace'(_378702, _378704))
^  Call: (281) [system] sig_atomic(system:'$notrace'(_378702, _378704))
^  Exit: (280) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _273564), _378678, fail)), system:'$restore_trace'(3, -1))
   Call: (279) [system] atomic(_273564)
^  Redo: (278) [user] classify_and_convert_charseq('A', [t, o, m], _273564)
^  Unify: (278) [user] classify_and_convert_charseq('A', [t, o, m], _273564)
   Call: (279) [system] atom_chars(_273564, ['A', t, o, m])
   Exit: (279) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (278) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (277) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (276) [user] read_list(')', (0x55aefe44e2f0), _389956)
^  Unify: (276) [user] read_list(')', (0x55aefe44e2f0), _389956)
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _393670)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (278) [system] ' '=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space(' ')
^  Unify: (278) [user] is_like_space(' ')
   Call: (279) [system] char_type(' ', 'white')
   Exit: (279) [system] char_type(' ', 'white')
^  Exit: (278) [user] is_like_space(' ')
   Call: (278) [system] get_char((0x55aefe44e2f0), _402328)
   Exit: (278) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _405956)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (279) [system] 'A'=(;)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', 'white')
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', end_of_line)
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', space)
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', cntrl)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _423664)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (277) [system] 'A'=')'
^  Redo: (276) [user] read_list(')', (0x55aefe44e2f0), _389956)
   Call: (277) [system] 'A'=end_of_file
^  Redo: (276) [user] read_list(')', (0x55aefe44e2f0), _389956)
^  Call: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _429242)
^  Unify: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _429242)
^  Call: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _432956)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), 'A')
   Call: (279) [system] 'A'=(;)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', 'white')
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', end_of_line)
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', space)
^  Redo: (279) [user] is_like_space('A')
^  Unify: (279) [user] is_like_space('A')
   Call: (280) [system] char_type('A', cntrl)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] get_char((0x55aefe44e2f0), _449740)
   Exit: (278) [system] get_char((0x55aefe44e2f0), 'A')
   Call: (278) [system] 'A'='('
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _429242)
   Call: (278) [system] 'A'='['
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _429242)
   Call: (278) [system] 'A'='{'
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _429242)
   Call: (278) [system] 'A'='"'
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _429242)
   Call: (278) [system] 'A'=!
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _429242)
   Call: (278) [system] 'A'='\''
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _429242)
   Call: (278) [system] 'A'='`'
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _429242)
   Call: (278) [system] 'A'=end_of_file
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _429242)
^  Call: (278) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _429242)
^  Unify: (278) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', _429242)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _468350)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _468350)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _470216)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (280) [user] is_delimiter(t)
^  Unify: (280) [user] is_delimiter(t)
   Call: (281) [system] char_type(t, space)
^  Redo: (280) [user] is_delimiter(t)
   Call: (281) [system] arg(_475856, v('(', ')', end_of_file), t)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _468350)
   Call: (280) [system] ')'==t
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _468350)
   Call: (280) [system] get_char((0x55aefe44e2f0), t)
   Exit: (280) [system] get_char((0x55aefe44e2f0), t)
   Call: (280) [system] t=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _468350)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _483222)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _483222)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _485088)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (281) [user] is_delimiter(o)
^  Unify: (281) [user] is_delimiter(o)
   Call: (282) [system] char_type(o, space)
^  Redo: (281) [user] is_delimiter(o)
   Call: (282) [system] arg(_490728, v('(', ')', end_of_file), o)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _483222)
   Call: (281) [system] ')'==o
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _483222)
   Call: (281) [system] get_char((0x55aefe44e2f0), o)
   Exit: (281) [system] get_char((0x55aefe44e2f0), o)
   Call: (281) [system] o=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _483222)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _498094)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _498094)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _499960)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (282) [user] is_delimiter(m)
^  Unify: (282) [user] is_delimiter(m)
   Call: (283) [system] char_type(m, space)
^  Redo: (282) [user] is_delimiter(m)
   Call: (283) [system] arg(_505600, v('(', ')', end_of_file), m)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _498094)
   Call: (282) [system] ')'==m
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _498094)
   Call: (282) [system] get_char((0x55aefe44e2f0), m)
   Exit: (282) [system] get_char((0x55aefe44e2f0), m)
   Call: (282) [system] m=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _498094)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _512966)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _512966)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _514832)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (283) [user] is_delimiter(')')
^  Unify: (283) [user] is_delimiter(')')
   Call: (284) [system] char_type(')', space)
^  Redo: (283) [user] is_delimiter(')')
   Call: (284) [system] arg(_520472, v('(', ')', end_of_file), ')')
   Exit: (284) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (283) [user] is_delimiter(')')
   Call: (283) [system] _512966=[]
   Exit: (283) [system] []=[]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (282) [system] _6036=[m]
   Exit: (282) [system] [m]=[m]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (281) [system] _6032=[o, m]
   Exit: (281) [system] [o, m]=[o, m]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (280) [system] _6028=[t, o, m]
   Exit: (280) [system] [t, o, m]=[t, o, m]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
^  Call: (279) [user] classify_and_convert_charseq('A', [t, o, m], _6024)
^  Unify: (279) [user] classify_and_convert_charseq('A', [t, o, m], _6024)
^  Call: (281) [system] setup_call_cleanup('$notrace'(_18146, _18148), once(user:catch(read_from_chars(['A', t, o, m], _6024), _18122, fail)), '$restore_trace'(_18146, _18148))
^  Unify: (281) [system] setup_call_cleanup(system:'$notrace'(_18146, _18148), system:once(user:catch(read_from_chars(['A', t, o, m], _6024), _18122, fail)), system:'$restore_trace'(_18146, _18148))
^  Call: (282) [system] sig_atomic(system:'$notrace'(_18146, _18148))
^  Exit: (281) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['A', t, o, m], _6024), _18122, fail)), system:'$restore_trace'(3, -1))
   Call: (280) [system] atomic(_6024)
^  Redo: (279) [user] classify_and_convert_charseq('A', [t, o, m], _6024)
^  Unify: (279) [user] classify_and_convert_charseq('A', [t, o, m], _6024)
   Call: (280) [system] atom_chars(_6024, ['A', t, o, m])
   Exit: (280) [system] atom_chars('Atom', ['A', t, o, m])
^  Exit: (279) [user] classify_and_convert_charseq('A', [t, o, m], 'Atom')
^  Exit: (278) [user] read_symbolic(')', (0x55aefe44e2f0), 'A', 'Atom')
^  Exit: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Atom')
^  Call: (277) [user] read_list(')', (0x55aefe44e2f0), _29400)
^  Unify: (277) [user] read_list(')', (0x55aefe44e2f0), _29400)
^  Call: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _33114)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (279) [system] ')'=(;)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (279) [user] is_like_space(')')
^  Unify: (279) [user] is_like_space(')')
   Call: (280) [system] char_type(')', 'white')
^  Redo: (279) [user] is_like_space(')')
^  Unify: (279) [user] is_like_space(')')
   Call: (280) [system] char_type(')', end_of_line)
^  Redo: (279) [user] is_like_space(')')
^  Unify: (279) [user] is_like_space(')')
   Call: (280) [system] char_type(')', space)
^  Redo: (279) [user] is_like_space(')')
^  Unify: (279) [user] is_like_space(')')
   Call: (280) [system] char_type(')', cntrl)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _49898)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (278) [system] ')'=')'
   Exit: (278) [system] ')'=')'
   Call: (278) [system] get_char((0x55aefe44e2f0), _53688)
   Exit: (278) [system] get_char((0x55aefe44e2f0), ')')
   Call: (278) [system] _29400=[]
   Exit: (278) [system] []=[]
^  Exit: (277) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (277) [system] _6020=['Atom']
   Exit: (277) [system] ['Atom']=['Atom']
^  Exit: (276) [user] read_list(')', (0x55aefe44e2f0), ['Atom'])
   Call: (276) [system] _6014=['Atom', 'Atom']
   Exit: (276) [system] ['Atom', 'Atom']=['Atom', 'Atom']
^  Exit: (275) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Atom'])
   Call: (275) [system] _6008=['Atom', 'Atom', 'Atom']
   Exit: (275) [system] ['Atom', 'Atom', 'Atom']=['Atom', 'Atom', 'Atom']
^  Exit: (274) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Atom', 'Atom'])
   Call: (274) [system] _6002=['Atom', 'Atom', 'Atom', 'Atom']
   Exit: (274) [system] ['Atom', 'Atom', 'Atom', 'Atom']=['Atom', 'Atom', 'Atom', 'Atom']
^  Exit: (273) [user] read_list(')', (0x55aefe44e2f0), ['Atom', 'Atom', 'Atom', 'Atom'])
   Call: (273) [system] _5994=[->, 'Atom', 'Atom', 'Atom', 'Atom']
   Exit: (273) [system] [->, 'Atom', 'Atom', 'Atom', 'Atom']=[->, 'Atom', 'Atom', 'Atom', 'Atom']
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), [->, 'Atom', 'Atom', 'Atom', 'Atom'])
^  Exit: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), [->, 'Atom', 'Atom', 'Atom', 'Atom'])
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _73158)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _73158)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _76872)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (273) [system] ')'=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', 'white')
^  Redo: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', end_of_line)
^  Redo: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', space)
^  Redo: (273) [user] is_like_space(')')
^  Unify: (273) [user] is_like_space(')')
   Call: (274) [system] char_type(')', cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _93656)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (272) [system] ')'=')'
   Exit: (272) [system] ')'=')'
   Call: (272) [system] get_char((0x55aefe44e2f0), _97446)
   Exit: (272) [system] get_char((0x55aefe44e2f0), ')')
   Call: (272) [system] _73158=[]
   Exit: (272) [system] []=[]
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (271) [system] _5990=[[->, 'Atom', 'Atom', 'Atom', 'Atom']]
   Exit: (271) [system] [[->, 'Atom', 'Atom', 'Atom', 'Atom']]=[[->, 'Atom', 'Atom', 'Atom', 'Atom']]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), [[->, 'Atom', 'Atom', 'Atom', 'Atom']])
   Call: (270) [system] _5984=['if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]
   Exit: (270) [system] ['if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]=['if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]
^  Exit: (269) [user] read_list(')', (0x55aefe44e2f0), ['if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
   Call: (269) [system] _5944=[:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]
   Exit: (269) [system] [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]=[:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]
^  Exit: (268) [user] read_list(')', (0x55aefe44e2f0), [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (267) [user] cont_sexpr(')', (0x55aefe44e2f0), [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (266) [user] read_sexpr((0x55aefe44e2f0), [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Call: (266) [user] assertz(metta_file_comment(34, 0, 1034, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], '$stream_position'(1034, 34, 0, 1034)))
^  Exit: (266) [user] assertz(metta_file_comment(34, 0, 1034, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], '$stream_position'(1034, 34, 0, 1034)))
^  Exit: (264) [system] once(user:(read_position((0x55aefe44e2f0), 34, 0, 1034, '$stream_position'(1034, 34, 0, 1034)), read_sexpr((0x55aefe44e2f0), [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]), assertz(metta_file_comment(34, 0, 1034, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], '$stream_position'(1034, 34, 0, 1034)))))
   Call: (264) [system] fail
^  Redo: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Unify: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _5908)
^  Call: (264) [user] retract(metta_file_comment(_117820, _117822, _117824, _117826, _117828))
^  Exit: (264) [user] retract(metta_file_comment(34, 0, 1034, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], '$stream_position'(1034, 34, 0, 1034)))
^  Call: (264) [user] trly(untyped_to_metta, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _5908)
^  Unify: (264) [user] trly(untyped_to_metta, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _5908)
^  Call: (265) [user] once(call(untyped_to_metta, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _121618))
^  Unify: (265) [system] once(user:call(untyped_to_metta, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _121618))
^  Call: (266) [user] call(untyped_to_metta, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _121618)
^  Unify: (266) [system] call(user:untyped_to_metta, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _121618)
^  Call: (267) [user] untyped_to_metta([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _121618)
^  Unify: (267) [user] untyped_to_metta([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _121618)
^  Call: (268) [user] must_det_ll(trly(mfix_vars1, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _127230))
^  Unify: (268) [user] must_det_ll(user:trly(mfix_vars1, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _127230))
^  Call: (269) [user] once(user:trly(mfix_vars1, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _127230))
^  Unify: (269) [system] once(user:trly(mfix_vars1, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _127230))
^  Call: (270) [user] trly(mfix_vars1, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _127230)
^  Unify: (270) [user] trly(mfix_vars1, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _127230)
^  Call: (271) [user] once(call(mfix_vars1, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816))
^  Unify: (271) [system] once(user:call(mfix_vars1, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816))
^  Call: (272) [user] call(mfix_vars1, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816)
^  Unify: (272) [system] call(user:mfix_vars1, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816)
^  Call: (273) [user] mfix_vars1([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816)
^  Unify: (273) [user] mfix_vars1([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816)
   Call: (274) [system] var([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Redo: (273) [user] mfix_vars1([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816)
^  Unify: (273) [user] mfix_vars1([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], '$VAR'(_140276))
   Call: (274) [system] atom([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Redo: (273) [user] mfix_vars1([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816)
^  Unify: (273) [user] mfix_vars1([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816)
   Call: (274) [system] [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]==true
^  Redo: (273) [user] mfix_vars1([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816)
^  Unify: (273) [user] mfix_vars1([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816)
   Call: (274) [system] [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]==false
^  Redo: (273) [user] mfix_vars1([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816)
^  Unify: (273) [user] mfix_vars1([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816)
   Call: (274) [system] (:)=='['
^  Redo: (273) [user] mfix_vars1([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816)
^  Unify: (273) [user] mfix_vars1([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816)
   Call: (274) [system] (:)=='{'
^  Redo: (273) [user] mfix_vars1([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816)
^  Unify: (273) [user] mfix_vars1([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816)
   Call: (274) [system] is_list(['if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
   Exit: (274) [system] is_list(['if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
   Call: (274) [lists] lists:last(['if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _156970)
   Unify: (274) [lists] lists:last(['if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _156970)
   Call: (275) [lists] lists:last_([[->, 'Atom', 'Atom', 'Atom', 'Atom']], 'if-error', _156970)
   Unify: (275) [lists] lists:last_([[->, 'Atom', 'Atom', 'Atom', 'Atom']], 'if-error', _156970)
   Call: (276) [lists] lists:last_([], [->, 'Atom', 'Atom', 'Atom', 'Atom'], _156970)
   Unify: (276) [lists] lists:last_([], [->, 'Atom', 'Atom', 'Atom', 'Atom'], [->, 'Atom', 'Atom', 'Atom', 'Atom'])
   Exit: (276) [lists] lists:last_([], [->, 'Atom', 'Atom', 'Atom', 'Atom'], [->, 'Atom', 'Atom', 'Atom', 'Atom'])
   Exit: (275) [lists] lists:last_([[->, 'Atom', 'Atom', 'Atom', 'Atom']], 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom'])
   Exit: (274) [lists] lists:last(['if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [->, 'Atom', 'Atom', 'Atom', 'Atom'])
   Call: (274) [system] [->, 'Atom', 'Atom', 'Atom', 'Atom']=='}'
^  Redo: (273) [user] mfix_vars1([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816)
^  Unify: (273) [user] mfix_vars1([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816)
   Call: (274) [system] [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]==[_168134, _168140]
^  Redo: (273) [user] mfix_vars1([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816)
^  Unify: (273) [user] mfix_vars1([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816)
   Call: (274) [system] fail
^  Redo: (273) [user] mfix_vars1([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816)
^  Unify: (273) [user] mfix_vars1([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816)
   Call: (274) [system] is_list([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
   Exit: (274) [system] is_list([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Call: (274) [user] apply:maplist(mfix_vars1, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816)
^  Unify: (274) [apply] apply:maplist(user:mfix_vars1, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816)
   Call: (275) [apply] apply:maplist_([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _132816, user:mfix_vars1)
   Unify: (275) [apply] apply:maplist_([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [_178364|_178366], user:mfix_vars1)
^  Call: (276) [user] mfix_vars1(:, _178364)
^  Unify: (276) [user] mfix_vars1(:, _178364)
   Call: (277) [system] var(:)
^  Redo: (276) [user] mfix_vars1(:, _178364)
^  Unify: (276) [user] mfix_vars1(:, '$VAR'(_183010))
   Call: (277) [system] atom(:)
   Exit: (277) [system] atom(:)
^  Call: (277) [user] symbol_concat($, _185788, :)
^  Unify: (277) [user] symbol_concat($, _185788, :)
   Call: (278) [system] atom_concat($, _185788, :)
   Fail: (278) [system] atom_concat($, _185788, :)
^  Fail: (277) [user] symbol_concat($, _185788, :)
^  Redo: (276) [user] mfix_vars1(:, _178364)
^  Unify: (276) [user] mfix_vars1(:, _178364)
   Call: (277) [system] (:)==true
^  Redo: (276) [user] mfix_vars1(:, _178364)
^  Unify: (276) [user] mfix_vars1(:, _178364)
   Call: (277) [system] (:)==false
^  Redo: (276) [user] mfix_vars1(:, _178364)
^  Unify: (276) [user] mfix_vars1(:, _178364)
   Call: (277) [system] (:)==[_197876, _197882]
^  Redo: (276) [user] mfix_vars1(:, _178364)
^  Unify: (276) [user] mfix_vars1(:, _178364)
   Call: (277) [system] is_list(:)
^  Redo: (276) [user] mfix_vars1(:, _178364)
^  Unify: (276) [user] mfix_vars1(:, _178364)
   Call: (277) [system] string(:)
^  Redo: (276) [user] mfix_vars1(:, _178364)
^  Unify: (276) [user] mfix_vars1(:, _178364)
   Call: (277) [system] compound(:)
^  Redo: (276) [user] mfix_vars1(:, _178364)
^  Unify: (276) [user] mfix_vars1(:, _178364)
^  Call: (277) [user] symbol(:)
^  Unify: (277) [user] symbol(:)
   Call: (278) [system] atom(:)
   Exit: (278) [system] atom(:)
^  Exit: (277) [user] symbol(:)
^  Unify: (276) [user] mfix_vars1(:, :)
^  Exit: (276) [user] mfix_vars1(:, :)
   Call: (276) [apply] apply:maplist_(['if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _178366, user:mfix_vars1)
   Unify: (276) [apply] apply:maplist_(['if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [_216420|_216422], user:mfix_vars1)
^  Call: (277) [user] mfix_vars1('if-error', _216420)
^  Unify: (277) [user] mfix_vars1('if-error', _216420)
   Call: (278) [system] var('if-error')
^  Redo: (277) [user] mfix_vars1('if-error', _216420)
^  Unify: (277) [user] mfix_vars1('if-error', '$VAR'(_221066))
   Call: (278) [system] atom('if-error')
   Exit: (278) [system] atom('if-error')
^  Call: (278) [user] symbol_concat($, _223844, 'if-error')
^  Unify: (278) [user] symbol_concat($, _223844, 'if-error')
   Call: (279) [system] atom_concat($, _223844, 'if-error')
   Fail: (279) [system] atom_concat($, _223844, 'if-error')
^  Fail: (278) [user] symbol_concat($, _223844, 'if-error')
^  Redo: (277) [user] mfix_vars1('if-error', _216420)
^  Unify: (277) [user] mfix_vars1('if-error', _216420)
   Call: (278) [system] 'if-error'==true
^  Redo: (277) [user] mfix_vars1('if-error', _216420)
^  Unify: (277) [user] mfix_vars1('if-error', _216420)
   Call: (278) [system] 'if-error'==false
^  Redo: (277) [user] mfix_vars1('if-error', _216420)
^  Unify: (277) [user] mfix_vars1('if-error', _216420)
   Call: (278) [system] 'if-error'==[_235932, _235938]
^  Redo: (277) [user] mfix_vars1('if-error', _216420)
^  Unify: (277) [user] mfix_vars1('if-error', _216420)
   Call: (278) [system] is_list('if-error')
^  Redo: (277) [user] mfix_vars1('if-error', _216420)
^  Unify: (277) [user] mfix_vars1('if-error', _216420)
   Call: (278) [system] string('if-error')
^  Redo: (277) [user] mfix_vars1('if-error', _216420)
^  Unify: (277) [user] mfix_vars1('if-error', _216420)
   Call: (278) [system] compound('if-error')
^  Redo: (277) [user] mfix_vars1('if-error', _216420)
^  Unify: (277) [user] mfix_vars1('if-error', _216420)
^  Call: (278) [user] symbol('if-error')
^  Unify: (278) [user] symbol('if-error')
   Call: (279) [system] atom('if-error')
   Exit: (279) [system] atom('if-error')
^  Exit: (278) [user] symbol('if-error')
^  Unify: (277) [user] mfix_vars1('if-error', 'if-error')
^  Exit: (277) [user] mfix_vars1('if-error', 'if-error')
   Call: (277) [apply] apply:maplist_([[->, 'Atom', 'Atom', 'Atom', 'Atom']], _216422, user:mfix_vars1)
   Unify: (277) [apply] apply:maplist_([[->, 'Atom', 'Atom', 'Atom', 'Atom']], [_254476|_254478], user:mfix_vars1)
^  Call: (278) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom'], _254476)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom'], _254476)
   Call: (279) [system] var([->, 'Atom', 'Atom', 'Atom', 'Atom'])
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom'], _254476)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom'], '$VAR'(_259122))
   Call: (279) [system] atom([->, 'Atom', 'Atom', 'Atom', 'Atom'])
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom'], _254476)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom'], _254476)
   Call: (279) [system] [->, 'Atom', 'Atom', 'Atom', 'Atom']==true
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom'], _254476)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom'], _254476)
   Call: (279) [system] [->, 'Atom', 'Atom', 'Atom', 'Atom']==false
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom'], _254476)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom'], _254476)
   Call: (279) [system] (->)=='['
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom'], _254476)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom'], _254476)
   Call: (279) [system] (->)=='{'
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom'], _254476)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom'], _254476)
   Call: (279) [system] is_list(['Atom', 'Atom', 'Atom', 'Atom'])
   Exit: (279) [system] is_list(['Atom', 'Atom', 'Atom', 'Atom'])
   Call: (279) [lists] lists:last(['Atom', 'Atom', 'Atom', 'Atom'], _275816)
   Unify: (279) [lists] lists:last(['Atom', 'Atom', 'Atom', 'Atom'], _275816)
   Call: (280) [lists] lists:last_(['Atom', 'Atom', 'Atom'], 'Atom', _275816)
   Unify: (280) [lists] lists:last_(['Atom', 'Atom', 'Atom'], 'Atom', _275816)
   Call: (281) [lists] lists:last_(['Atom', 'Atom'], 'Atom', _275816)
   Unify: (281) [lists] lists:last_(['Atom', 'Atom'], 'Atom', _275816)
   Call: (282) [lists] lists:last_(['Atom'], 'Atom', _275816)
   Unify: (282) [lists] lists:last_(['Atom'], 'Atom', _275816)
   Call: (283) [lists] lists:last_([], 'Atom', _275816)
   Unify: (283) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (283) [lists] lists:last_([], 'Atom', 'Atom')
   Exit: (282) [lists] lists:last_(['Atom'], 'Atom', 'Atom')
   Exit: (281) [lists] lists:last_(['Atom', 'Atom'], 'Atom', 'Atom')
   Exit: (280) [lists] lists:last_(['Atom', 'Atom', 'Atom'], 'Atom', 'Atom')
   Exit: (279) [lists] lists:last(['Atom', 'Atom', 'Atom', 'Atom'], 'Atom')
   Call: (279) [system] 'Atom'=='}'
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom'], _254476)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom'], _254476)
   Call: (279) [system] [->, 'Atom', 'Atom', 'Atom', 'Atom']==[_292572, _292578]
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom'], _254476)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom'], _254476)
   Call: (279) [system] fail
^  Redo: (278) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom'], _254476)
^  Unify: (278) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom'], _254476)
   Call: (279) [system] is_list([->, 'Atom', 'Atom', 'Atom', 'Atom'])
   Exit: (279) [system] is_list([->, 'Atom', 'Atom', 'Atom', 'Atom'])
^  Call: (279) [user] apply:maplist(mfix_vars1, [->, 'Atom', 'Atom', 'Atom', 'Atom'], _254476)
^  Unify: (279) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Atom', 'Atom', 'Atom'], _254476)
   Call: (280) [apply] apply:maplist_([->, 'Atom', 'Atom', 'Atom', 'Atom'], _254476, user:mfix_vars1)
   Unify: (280) [apply] apply:maplist_([->, 'Atom', 'Atom', 'Atom', 'Atom'], [_302802|_302804], user:mfix_vars1)
^  Call: (281) [user] mfix_vars1(->, _302802)
^  Unify: (281) [user] mfix_vars1(->, _302802)
   Call: (282) [system] var(->)
^  Redo: (281) [user] mfix_vars1(->, _302802)
^  Unify: (281) [user] mfix_vars1(->, '$VAR'(_307448))
   Call: (282) [system] atom(->)
   Exit: (282) [system] atom(->)
^  Call: (282) [user] symbol_concat($, _310226, ->)
^  Unify: (282) [user] symbol_concat($, _310226, ->)
   Call: (283) [system] atom_concat($, _310226, ->)
   Fail: (283) [system] atom_concat($, _310226, ->)
^  Fail: (282) [user] symbol_concat($, _310226, ->)
^  Redo: (281) [user] mfix_vars1(->, _302802)
^  Unify: (281) [user] mfix_vars1(->, _302802)
   Call: (282) [system] (->)==true
^  Redo: (281) [user] mfix_vars1(->, _302802)
^  Unify: (281) [user] mfix_vars1(->, _302802)
   Call: (282) [system] (->)==false
^  Redo: (281) [user] mfix_vars1(->, _302802)
^  Unify: (281) [user] mfix_vars1(->, _302802)
   Call: (282) [system] (->)==[_322314, _322320]
^  Redo: (281) [user] mfix_vars1(->, _302802)
^  Unify: (281) [user] mfix_vars1(->, _302802)
   Call: (282) [system] is_list(->)
^  Redo: (281) [user] mfix_vars1(->, _302802)
^  Unify: (281) [user] mfix_vars1(->, _302802)
   Call: (282) [system] string(->)
^  Redo: (281) [user] mfix_vars1(->, _302802)
^  Unify: (281) [user] mfix_vars1(->, _302802)
   Call: (282) [system] compound(->)
^  Redo: (281) [user] mfix_vars1(->, _302802)
^  Unify: (281) [user] mfix_vars1(->, _302802)
^  Call: (282) [user] symbol(->)
^  Unify: (282) [user] symbol(->)
   Call: (283) [system] atom(->)
   Exit: (283) [system] atom(->)
^  Exit: (282) [user] symbol(->)
^  Unify: (281) [user] mfix_vars1(->, ->)
^  Exit: (281) [user] mfix_vars1(->, ->)
   Call: (281) [apply] apply:maplist_(['Atom', 'Atom', 'Atom', 'Atom'], _302804, user:mfix_vars1)
   Unify: (281) [apply] apply:maplist_(['Atom', 'Atom', 'Atom', 'Atom'], [_340858|_340860], user:mfix_vars1)
^  Call: (282) [user] mfix_vars1('Atom', _340858)
^  Unify: (282) [user] mfix_vars1('Atom', _340858)
   Call: (283) [system] var('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _340858)
^  Unify: (282) [user] mfix_vars1('Atom', '$VAR'(_345504))
   Call: (283) [system] atom('Atom')
   Exit: (283) [system] atom('Atom')
^  Call: (283) [user] symbol_concat($, _348282, 'Atom')
^  Unify: (283) [user] symbol_concat($, _348282, 'Atom')
   Call: (284) [system] atom_concat($, _348282, 'Atom')
   Fail: (284) [system] atom_concat($, _348282, 'Atom')
^  Fail: (283) [user] symbol_concat($, _348282, 'Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _340858)
^  Unify: (282) [user] mfix_vars1('Atom', _340858)
   Call: (283) [system] 'Atom'==true
^  Redo: (282) [user] mfix_vars1('Atom', _340858)
^  Unify: (282) [user] mfix_vars1('Atom', _340858)
   Call: (283) [system] 'Atom'==false
^  Redo: (282) [user] mfix_vars1('Atom', _340858)
^  Unify: (282) [user] mfix_vars1('Atom', _340858)
   Call: (283) [system] 'Atom'==[_360370, _360376]
^  Redo: (282) [user] mfix_vars1('Atom', _340858)
^  Unify: (282) [user] mfix_vars1('Atom', _340858)
   Call: (283) [system] is_list('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _340858)
^  Unify: (282) [user] mfix_vars1('Atom', _340858)
   Call: (283) [system] string('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _340858)
^  Unify: (282) [user] mfix_vars1('Atom', _340858)
   Call: (283) [system] compound('Atom')
^  Redo: (282) [user] mfix_vars1('Atom', _340858)
^  Unify: (282) [user] mfix_vars1('Atom', _340858)
^  Call: (283) [user] symbol('Atom')
^  Unify: (283) [user] symbol('Atom')
   Call: (284) [system] atom('Atom')
   Exit: (284) [system] atom('Atom')
^  Exit: (283) [user] symbol('Atom')
^  Unify: (282) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (282) [user] mfix_vars1('Atom', 'Atom')
   Call: (282) [apply] apply:maplist_(['Atom', 'Atom', 'Atom'], _340860, user:mfix_vars1)
   Unify: (282) [apply] apply:maplist_(['Atom', 'Atom', 'Atom'], [_378914|_378916], user:mfix_vars1)
^  Call: (283) [user] mfix_vars1('Atom', _378914)
^  Unify: (283) [user] mfix_vars1('Atom', _378914)
   Call: (284) [system] var('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _378914)
^  Unify: (283) [user] mfix_vars1('Atom', '$VAR'(_383560))
   Call: (284) [system] atom('Atom')
   Exit: (284) [system] atom('Atom')
^  Call: (284) [user] symbol_concat($, _386338, 'Atom')
^  Unify: (284) [user] symbol_concat($, _386338, 'Atom')
   Call: (285) [system] atom_concat($, _386338, 'Atom')
   Fail: (285) [system] atom_concat($, _386338, 'Atom')
^  Fail: (284) [user] symbol_concat($, _386338, 'Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _378914)
^  Unify: (283) [user] mfix_vars1('Atom', _378914)
   Call: (284) [system] 'Atom'==true
^  Redo: (283) [user] mfix_vars1('Atom', _378914)
^  Unify: (283) [user] mfix_vars1('Atom', _378914)
   Call: (284) [system] 'Atom'==false
^  Redo: (283) [user] mfix_vars1('Atom', _378914)
^  Unify: (283) [user] mfix_vars1('Atom', _378914)
   Call: (284) [system] 'Atom'==[_398426, _398432]
^  Redo: (283) [user] mfix_vars1('Atom', _378914)
^  Unify: (283) [user] mfix_vars1('Atom', _378914)
   Call: (284) [system] is_list('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _378914)
^  Unify: (283) [user] mfix_vars1('Atom', _378914)
   Call: (284) [system] string('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _378914)
^  Unify: (283) [user] mfix_vars1('Atom', _378914)
   Call: (284) [system] compound('Atom')
^  Redo: (283) [user] mfix_vars1('Atom', _378914)
^  Unify: (283) [user] mfix_vars1('Atom', _378914)
^  Call: (284) [user] symbol('Atom')
^  Unify: (284) [user] symbol('Atom')
   Call: (285) [system] atom('Atom')
   Exit: (285) [system] atom('Atom')
^  Exit: (284) [user] symbol('Atom')
^  Unify: (283) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (283) [user] mfix_vars1('Atom', 'Atom')
   Call: (283) [apply] apply:maplist_(['Atom', 'Atom'], _378916, user:mfix_vars1)
   Unify: (283) [apply] apply:maplist_(['Atom', 'Atom'], [_416970|_416972], user:mfix_vars1)
^  Call: (284) [user] mfix_vars1('Atom', _416970)
^  Unify: (284) [user] mfix_vars1('Atom', _416970)
   Call: (285) [system] var('Atom')
^  Redo: (284) [user] mfix_vars1('Atom', _416970)
^  Unify: (284) [user] mfix_vars1('Atom', '$VAR'(_421616))
   Call: (285) [system] atom('Atom')
   Exit: (285) [system] atom('Atom')
^  Call: (285) [user] symbol_concat($, _424394, 'Atom')
^  Unify: (285) [user] symbol_concat($, _424394, 'Atom')
   Call: (286) [system] atom_concat($, _424394, 'Atom')
   Fail: (286) [system] atom_concat($, _424394, 'Atom')
^  Fail: (285) [user] symbol_concat($, _424394, 'Atom')
^  Redo: (284) [user] mfix_vars1('Atom', _416970)
^  Unify: (284) [user] mfix_vars1('Atom', _416970)
   Call: (285) [system] 'Atom'==true
^  Redo: (284) [user] mfix_vars1('Atom', _416970)
^  Unify: (284) [user] mfix_vars1('Atom', _416970)
   Call: (285) [system] 'Atom'==false
^  Redo: (284) [user] mfix_vars1('Atom', _416970)
^  Unify: (284) [user] mfix_vars1('Atom', _416970)
   Call: (285) [system] 'Atom'==[_436482, _436488]
^  Redo: (284) [user] mfix_vars1('Atom', _416970)
^  Unify: (284) [user] mfix_vars1('Atom', _416970)
   Call: (285) [system] is_list('Atom')
^  Redo: (284) [user] mfix_vars1('Atom', _416970)
^  Unify: (284) [user] mfix_vars1('Atom', _416970)
   Call: (285) [system] string('Atom')
^  Redo: (284) [user] mfix_vars1('Atom', _416970)
^  Unify: (284) [user] mfix_vars1('Atom', _416970)
   Call: (285) [system] compound('Atom')
^  Redo: (284) [user] mfix_vars1('Atom', _416970)
^  Unify: (284) [user] mfix_vars1('Atom', _416970)
^  Call: (285) [user] symbol('Atom')
^  Unify: (285) [user] symbol('Atom')
   Call: (286) [system] atom('Atom')
   Exit: (286) [system] atom('Atom')
^  Exit: (285) [user] symbol('Atom')
^  Unify: (284) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (284) [user] mfix_vars1('Atom', 'Atom')
   Call: (284) [apply] apply:maplist_(['Atom'], _416972, user:mfix_vars1)
   Unify: (284) [apply] apply:maplist_(['Atom'], [_455026|_455028], user:mfix_vars1)
^  Call: (285) [user] mfix_vars1('Atom', _455026)
^  Unify: (285) [user] mfix_vars1('Atom', _455026)
   Call: (286) [system] var('Atom')
^  Redo: (285) [user] mfix_vars1('Atom', _455026)
^  Unify: (285) [user] mfix_vars1('Atom', '$VAR'(_459672))
   Call: (286) [system] atom('Atom')
   Exit: (286) [system] atom('Atom')
^  Call: (286) [user] symbol_concat($, _462450, 'Atom')
^  Unify: (286) [user] symbol_concat($, _462450, 'Atom')
   Call: (287) [system] atom_concat($, _462450, 'Atom')
   Fail: (287) [system] atom_concat($, _462450, 'Atom')
^  Fail: (286) [user] symbol_concat($, _462450, 'Atom')
^  Redo: (285) [user] mfix_vars1('Atom', _455026)
^  Unify: (285) [user] mfix_vars1('Atom', _455026)
   Call: (286) [system] 'Atom'==true
^  Redo: (285) [user] mfix_vars1('Atom', _455026)
^  Unify: (285) [user] mfix_vars1('Atom', _455026)
   Call: (286) [system] 'Atom'==false
^  Redo: (285) [user] mfix_vars1('Atom', _455026)
^  Unify: (285) [user] mfix_vars1('Atom', _455026)
   Call: (286) [system] 'Atom'==[_474538, _474544]
^  Redo: (285) [user] mfix_vars1('Atom', _455026)
^  Unify: (285) [user] mfix_vars1('Atom', _455026)
   Call: (286) [system] is_list('Atom')
^  Redo: (285) [user] mfix_vars1('Atom', _455026)
^  Unify: (285) [user] mfix_vars1('Atom', _455026)
   Call: (286) [system] string('Atom')
^  Redo: (285) [user] mfix_vars1('Atom', _455026)
^  Unify: (285) [user] mfix_vars1('Atom', _455026)
   Call: (286) [system] compound('Atom')
^  Redo: (285) [user] mfix_vars1('Atom', _455026)
^  Unify: (285) [user] mfix_vars1('Atom', _455026)
^  Call: (286) [user] symbol('Atom')
^  Unify: (286) [user] symbol('Atom')
   Call: (287) [system] atom('Atom')
   Exit: (287) [system] atom('Atom')
^  Exit: (286) [user] symbol('Atom')
^  Unify: (285) [user] mfix_vars1('Atom', 'Atom')
^  Exit: (285) [user] mfix_vars1('Atom', 'Atom')
   Call: (285) [apply] apply:maplist_([], _455028, user:mfix_vars1)
   Unify: (285) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (285) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (284) [apply] apply:maplist_(['Atom'], ['Atom'], user:mfix_vars1)
   Exit: (283) [apply] apply:maplist_(['Atom', 'Atom'], ['Atom', 'Atom'], user:mfix_vars1)
   Exit: (282) [apply] apply:maplist_(['Atom', 'Atom', 'Atom'], ['Atom', 'Atom', 'Atom'], user:mfix_vars1)
   Exit: (281) [apply] apply:maplist_(['Atom', 'Atom', 'Atom', 'Atom'], ['Atom', 'Atom', 'Atom', 'Atom'], user:mfix_vars1)
   Exit: (280) [apply] apply:maplist_([->, 'Atom', 'Atom', 'Atom', 'Atom'], [->, 'Atom', 'Atom', 'Atom', 'Atom'], user:mfix_vars1)
^  Exit: (279) [apply] apply:maplist(user:mfix_vars1, [->, 'Atom', 'Atom', 'Atom', 'Atom'], [->, 'Atom', 'Atom', 'Atom', 'Atom'])
^  Exit: (278) [user] mfix_vars1([->, 'Atom', 'Atom', 'Atom', 'Atom'], [->, 'Atom', 'Atom', 'Atom', 'Atom'])
   Call: (278) [apply] apply:maplist_([], _254478, user:mfix_vars1)
   Unify: (278) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (278) [apply] apply:maplist_([], [], user:mfix_vars1)
   Exit: (277) [apply] apply:maplist_([[->, 'Atom', 'Atom', 'Atom', 'Atom']], [[->, 'Atom', 'Atom', 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (276) [apply] apply:maplist_(['if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], ['if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], user:mfix_vars1)
   Exit: (275) [apply] apply:maplist_([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], user:mfix_vars1)
^  Exit: (274) [apply] apply:maplist(user:mfix_vars1, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (273) [user] mfix_vars1([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (272) [system] call(user:mfix_vars1, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (271) [system] once(user:call(mfix_vars1, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]))
   Call: (271) [system] [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]\=@=[:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]
^  Redo: (270) [user] trly(mfix_vars1, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _127230)
^  Unify: (270) [user] trly(mfix_vars1, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (270) [user] trly(mfix_vars1, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (269) [system] once(user:trly(mfix_vars1, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]))
^  Exit: (268) [user] must_det_ll(user:trly(mfix_vars1, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]))
^  Call: (268) [user] must_det_ll(trly(cons_to_c, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _516380))
^  Unify: (268) [user] must_det_ll(user:trly(cons_to_c, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _516380))
^  Call: (269) [user] once(user:trly(cons_to_c, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _516380))
^  Unify: (269) [system] once(user:trly(cons_to_c, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _516380))
^  Call: (270) [user] trly(cons_to_c, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _516380)
^  Unify: (270) [user] trly(cons_to_c, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _516380)
^  Call: (271) [user] once(call(cons_to_c, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _521966))
^  Unify: (271) [system] once(user:call(cons_to_c, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _521966))
^  Call: (272) [user] call(cons_to_c, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _6006)
^  Unify: (272) [system] call(user:cons_to_c, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _6006)
^  Call: (273) [user] cons_to_c([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _6006)
^  Unify: (273) [user] cons_to_c([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Call: (274) [user] no_cons_reduce
^  Unify: (274) [user] no_cons_reduce
^  Exit: (274) [user] no_cons_reduce
^  Exit: (273) [user] cons_to_c([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (272) [system] call(user:cons_to_c, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (271) [system] once(user:call(cons_to_c, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]))
   Call: (271) [system] [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]\=@=[:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]
^  Redo: (270) [user] trly(cons_to_c, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _5992)
^  Unify: (270) [user] trly(cons_to_c, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (270) [user] trly(cons_to_c, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (269) [system] once(user:trly(cons_to_c, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]))
^  Exit: (268) [user] must_det_ll(user:trly(cons_to_c, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]))
^  Call: (268) [user] must_det_ll(trly(cons_to_l, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _5970))
^  Unify: (268) [user] must_det_ll(user:trly(cons_to_l, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _5970))
^  Call: (269) [user] once(user:trly(cons_to_l, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _5970))
^  Unify: (269) [system] once(user:trly(cons_to_l, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _5970))
^  Call: (270) [user] trly(cons_to_l, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _5970)
^  Unify: (270) [user] trly(cons_to_l, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _5970)
^  Call: (271) [user] once(call(cons_to_l, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _26298))
^  Unify: (271) [system] once(user:call(cons_to_l, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _26298))
^  Call: (272) [user] call(cons_to_l, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _26298)
^  Unify: (272) [system] call(user:cons_to_l, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _26298)
^  Call: (273) [user] cons_to_l([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _26298)
^  Unify: (273) [user] cons_to_l([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Call: (274) [user] no_cons_reduce
^  Unify: (274) [user] no_cons_reduce
^  Exit: (274) [user] no_cons_reduce
^  Exit: (273) [user] cons_to_l([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (272) [system] call(user:cons_to_l, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (271) [system] once(user:call(cons_to_l, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]))
   Call: (271) [system] [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]\=@=[:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]
^  Redo: (270) [user] trly(cons_to_l, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _5970)
^  Unify: (270) [user] trly(cons_to_l, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (270) [user] trly(cons_to_l, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (269) [system] once(user:trly(cons_to_l, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]))
^  Exit: (268) [user] must_det_ll(user:trly(cons_to_l, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]))
^  Exit: (267) [user] untyped_to_metta([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (266) [system] call(user:untyped_to_metta, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (265) [system] once(user:call(untyped_to_metta, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]))
   Call: (265) [system] [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]\=@=[:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']]
^  Redo: (264) [user] trly(untyped_to_metta, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _5908)
^  Unify: (264) [user] trly(untyped_to_metta, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (264) [user] trly(untyped_to_metta, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (263) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
   Call: (263) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])))
   Unify: (263) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])))
   Exit: (263) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])))
^  Exit: (262) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (261) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
   Call: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])))
   Unify: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])))
   Exit: (259) [user] nop(wdmsg(new_parse_sexpr_metta_IO1((0x55aefe44e2f0), [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])))
^  Exit: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Exit: (257) [user] read_metta2((0x55aefe44e2f0), [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Call: (257) [user] subst_vars([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _61534, [], _61536)
^  Unify: (257) [user] subst_vars([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [], [])
   Call: (258) [system] var([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Redo: (257) [user] subst_vars([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _61534, [], _61536)
^  Unify: (257) [user] subst_vars([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [_65272|_65274], [], _61536)
^  Call: (258) [user] subst_vars(:, _65272, [], _66212)
^  Unify: (258) [user] subst_vars(:, :, [], [])
   Call: (259) [system] var(:)
^  Redo: (258) [user] subst_vars(:, _65272, [], _66212)
^  Unify: (258) [user] subst_vars(:, _65272, [], _66212)
   Call: (259) [system] atom(:)
   Exit: (259) [system] atom(:)
^  Call: (259) [user] symbol_concat($, _72730, :)
^  Unify: (259) [user] symbol_concat($, _72730, :)
   Call: (260) [system] atom_concat($, _72730, :)
   Fail: (260) [system] atom_concat($, _72730, :)
^  Fail: (259) [user] symbol_concat($, _72730, :)
^  Redo: (258) [user] subst_vars(:, _65272, [], _66212)
^  Unify: (258) [user] subst_vars(:, _65272, [], _66212)
   Call: (259) [system] compound(:)
^  Redo: (258) [user] subst_vars(:, _65272, [], _66212)
^  Unify: (258) [user] subst_vars(:, :, [], [])
^  Exit: (258) [user] subst_vars(:, :, [], [])
^  Call: (258) [user] subst_vars(['if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _65274, [], _61536)
^  Unify: (258) [user] subst_vars(['if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], ['if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [], [])
   Call: (259) [system] var(['if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Redo: (258) [user] subst_vars(['if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], _65274, [], _61536)
^  Unify: (258) [user] subst_vars(['if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [_86730|_86732], [], _61536)
^  Call: (259) [user] subst_vars('if-error', _86730, [], _87670)
^  Unify: (259) [user] subst_vars('if-error', 'if-error', [], [])
   Call: (260) [system] var('if-error')
^  Redo: (259) [user] subst_vars('if-error', _86730, [], _87670)
^  Unify: (259) [user] subst_vars('if-error', _86730, [], _87670)
   Call: (260) [system] atom('if-error')
   Exit: (260) [system] atom('if-error')
^  Call: (260) [user] symbol_concat($, _94188, 'if-error')
^  Unify: (260) [user] symbol_concat($, _94188, 'if-error')
   Call: (261) [system] atom_concat($, _94188, 'if-error')
   Fail: (261) [system] atom_concat($, _94188, 'if-error')
^  Fail: (260) [user] symbol_concat($, _94188, 'if-error')
^  Redo: (259) [user] subst_vars('if-error', _86730, [], _87670)
^  Unify: (259) [user] subst_vars('if-error', _86730, [], _87670)
   Call: (260) [system] compound('if-error')
^  Redo: (259) [user] subst_vars('if-error', _86730, [], _87670)
^  Unify: (259) [user] subst_vars('if-error', 'if-error', [], [])
^  Exit: (259) [user] subst_vars('if-error', 'if-error', [], [])
^  Call: (259) [user] subst_vars([[->, 'Atom', 'Atom', 'Atom', 'Atom']], _86732, [], _61536)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Atom', 'Atom', 'Atom']], [[->, 'Atom', 'Atom', 'Atom', 'Atom']], [], [])
   Call: (260) [system] var([[->, 'Atom', 'Atom', 'Atom', 'Atom']])
^  Redo: (259) [user] subst_vars([[->, 'Atom', 'Atom', 'Atom', 'Atom']], _86732, [], _61536)
^  Unify: (259) [user] subst_vars([[->, 'Atom', 'Atom', 'Atom', 'Atom']], [_108188|_108190], [], _61536)
^  Call: (260) [user] subst_vars([->, 'Atom', 'Atom', 'Atom', 'Atom'], _108188, [], _109128)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Atom', 'Atom', 'Atom'], [->, 'Atom', 'Atom', 'Atom', 'Atom'], [], [])
   Call: (261) [system] var([->, 'Atom', 'Atom', 'Atom', 'Atom'])
^  Redo: (260) [user] subst_vars([->, 'Atom', 'Atom', 'Atom', 'Atom'], _108188, [], _109128)
^  Unify: (260) [user] subst_vars([->, 'Atom', 'Atom', 'Atom', 'Atom'], [_112864|_112866], [], _109128)
^  Call: (261) [user] subst_vars(->, _112864, [], _113804)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
   Call: (262) [system] var(->)
^  Redo: (261) [user] subst_vars(->, _112864, [], _113804)
^  Unify: (261) [user] subst_vars(->, _112864, [], _113804)
   Call: (262) [system] atom(->)
   Exit: (262) [system] atom(->)
^  Call: (262) [user] symbol_concat($, _120322, ->)
^  Unify: (262) [user] symbol_concat($, _120322, ->)
   Call: (263) [system] atom_concat($, _120322, ->)
   Fail: (263) [system] atom_concat($, _120322, ->)
^  Fail: (262) [user] symbol_concat($, _120322, ->)
^  Redo: (261) [user] subst_vars(->, _112864, [], _113804)
^  Unify: (261) [user] subst_vars(->, _112864, [], _113804)
   Call: (262) [system] compound(->)
^  Redo: (261) [user] subst_vars(->, _112864, [], _113804)
^  Unify: (261) [user] subst_vars(->, ->, [], [])
^  Exit: (261) [user] subst_vars(->, ->, [], [])
^  Call: (261) [user] subst_vars(['Atom', 'Atom', 'Atom', 'Atom'], _112866, [], _109128)
^  Unify: (261) [user] subst_vars(['Atom', 'Atom', 'Atom', 'Atom'], ['Atom', 'Atom', 'Atom', 'Atom'], [], [])
   Call: (262) [system] var(['Atom', 'Atom', 'Atom', 'Atom'])
^  Redo: (261) [user] subst_vars(['Atom', 'Atom', 'Atom', 'Atom'], _112866, [], _109128)
^  Unify: (261) [user] subst_vars(['Atom', 'Atom', 'Atom', 'Atom'], [_134322|_134324], [], _109128)
^  Call: (262) [user] subst_vars('Atom', _134322, [], _135262)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (263) [system] var('Atom')
^  Redo: (262) [user] subst_vars('Atom', _134322, [], _135262)
^  Unify: (262) [user] subst_vars('Atom', _134322, [], _135262)
   Call: (263) [system] atom('Atom')
   Exit: (263) [system] atom('Atom')
^  Call: (263) [user] symbol_concat($, _141780, 'Atom')
^  Unify: (263) [user] symbol_concat($, _141780, 'Atom')
   Call: (264) [system] atom_concat($, _141780, 'Atom')
   Fail: (264) [system] atom_concat($, _141780, 'Atom')
^  Fail: (263) [user] symbol_concat($, _141780, 'Atom')
^  Redo: (262) [user] subst_vars('Atom', _134322, [], _135262)
^  Unify: (262) [user] subst_vars('Atom', _134322, [], _135262)
   Call: (263) [system] compound('Atom')
^  Redo: (262) [user] subst_vars('Atom', _134322, [], _135262)
^  Unify: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (262) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (262) [user] subst_vars(['Atom', 'Atom', 'Atom'], _134324, [], _109128)
^  Unify: (262) [user] subst_vars(['Atom', 'Atom', 'Atom'], ['Atom', 'Atom', 'Atom'], [], [])
   Call: (263) [system] var(['Atom', 'Atom', 'Atom'])
^  Redo: (262) [user] subst_vars(['Atom', 'Atom', 'Atom'], _134324, [], _109128)
^  Unify: (262) [user] subst_vars(['Atom', 'Atom', 'Atom'], [_155780|_155782], [], _109128)
^  Call: (263) [user] subst_vars('Atom', _155780, [], _156720)
^  Unify: (263) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (264) [system] var('Atom')
^  Redo: (263) [user] subst_vars('Atom', _155780, [], _156720)
^  Unify: (263) [user] subst_vars('Atom', _155780, [], _156720)
   Call: (264) [system] atom('Atom')
   Exit: (264) [system] atom('Atom')
^  Call: (264) [user] symbol_concat($, _163238, 'Atom')
^  Unify: (264) [user] symbol_concat($, _163238, 'Atom')
   Call: (265) [system] atom_concat($, _163238, 'Atom')
   Fail: (265) [system] atom_concat($, _163238, 'Atom')
^  Fail: (264) [user] symbol_concat($, _163238, 'Atom')
^  Redo: (263) [user] subst_vars('Atom', _155780, [], _156720)
^  Unify: (263) [user] subst_vars('Atom', _155780, [], _156720)
   Call: (264) [system] compound('Atom')
^  Redo: (263) [user] subst_vars('Atom', _155780, [], _156720)
^  Unify: (263) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (263) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (263) [user] subst_vars(['Atom', 'Atom'], _155782, [], _109128)
^  Unify: (263) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
   Call: (264) [system] var(['Atom', 'Atom'])
^  Redo: (263) [user] subst_vars(['Atom', 'Atom'], _155782, [], _109128)
^  Unify: (263) [user] subst_vars(['Atom', 'Atom'], [_177238|_177240], [], _109128)
^  Call: (264) [user] subst_vars('Atom', _177238, [], _178178)
^  Unify: (264) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (265) [system] var('Atom')
^  Redo: (264) [user] subst_vars('Atom', _177238, [], _178178)
^  Unify: (264) [user] subst_vars('Atom', _177238, [], _178178)
   Call: (265) [system] atom('Atom')
   Exit: (265) [system] atom('Atom')
^  Call: (265) [user] symbol_concat($, _184696, 'Atom')
^  Unify: (265) [user] symbol_concat($, _184696, 'Atom')
   Call: (266) [system] atom_concat($, _184696, 'Atom')
   Fail: (266) [system] atom_concat($, _184696, 'Atom')
^  Fail: (265) [user] symbol_concat($, _184696, 'Atom')
^  Redo: (264) [user] subst_vars('Atom', _177238, [], _178178)
^  Unify: (264) [user] subst_vars('Atom', _177238, [], _178178)
   Call: (265) [system] compound('Atom')
^  Redo: (264) [user] subst_vars('Atom', _177238, [], _178178)
^  Unify: (264) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (264) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (264) [user] subst_vars(['Atom'], _177240, [], _109128)
^  Unify: (264) [user] subst_vars(['Atom'], ['Atom'], [], [])
   Call: (265) [system] var(['Atom'])
^  Redo: (264) [user] subst_vars(['Atom'], _177240, [], _109128)
^  Unify: (264) [user] subst_vars(['Atom'], [_198696|_198698], [], _109128)
^  Call: (265) [user] subst_vars('Atom', _198696, [], _199636)
^  Unify: (265) [user] subst_vars('Atom', 'Atom', [], [])
   Call: (266) [system] var('Atom')
^  Redo: (265) [user] subst_vars('Atom', _198696, [], _199636)
^  Unify: (265) [user] subst_vars('Atom', _198696, [], _199636)
   Call: (266) [system] atom('Atom')
   Exit: (266) [system] atom('Atom')
^  Call: (266) [user] symbol_concat($, _206154, 'Atom')
^  Unify: (266) [user] symbol_concat($, _206154, 'Atom')
   Call: (267) [system] atom_concat($, _206154, 'Atom')
   Fail: (267) [system] atom_concat($, _206154, 'Atom')
^  Fail: (266) [user] symbol_concat($, _206154, 'Atom')
^  Redo: (265) [user] subst_vars('Atom', _198696, [], _199636)
^  Unify: (265) [user] subst_vars('Atom', _198696, [], _199636)
   Call: (266) [system] compound('Atom')
^  Redo: (265) [user] subst_vars('Atom', _198696, [], _199636)
^  Unify: (265) [user] subst_vars('Atom', 'Atom', [], [])
^  Exit: (265) [user] subst_vars('Atom', 'Atom', [], [])
^  Call: (265) [user] subst_vars([], _198698, [], _109128)
^  Unify: (265) [user] subst_vars([], [], [], [])
   Call: (266) [system] var([])
^  Redo: (265) [user] subst_vars([], _198698, [], _109128)
^  Unify: (265) [user] subst_vars([], [], [], [])
^  Exit: (265) [user] subst_vars([], [], [], [])
^  Exit: (264) [user] subst_vars(['Atom'], ['Atom'], [], [])
^  Exit: (263) [user] subst_vars(['Atom', 'Atom'], ['Atom', 'Atom'], [], [])
^  Exit: (262) [user] subst_vars(['Atom', 'Atom', 'Atom'], ['Atom', 'Atom', 'Atom'], [], [])
^  Exit: (261) [user] subst_vars(['Atom', 'Atom', 'Atom', 'Atom'], ['Atom', 'Atom', 'Atom', 'Atom'], [], [])
^  Exit: (260) [user] subst_vars([->, 'Atom', 'Atom', 'Atom', 'Atom'], [->, 'Atom', 'Atom', 'Atom', 'Atom'], [], [])
^  Call: (260) [user] subst_vars([], _108190, [], _61536)
^  Unify: (260) [user] subst_vars([], [], [], [])
   Call: (261) [system] var([])
^  Redo: (260) [user] subst_vars([], _108190, [], _61536)
^  Unify: (260) [user] subst_vars([], [], [], [])
^  Exit: (260) [user] subst_vars([], [], [], [])
^  Exit: (259) [user] subst_vars([[->, 'Atom', 'Atom', 'Atom', 'Atom']], [[->, 'Atom', 'Atom', 'Atom', 'Atom']], [], [])
^  Exit: (258) [user] subst_vars(['if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], ['if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [], [])
^  Exit: (257) [user] subst_vars([:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [], [])
   Call: (257) [system] _235116=metta_file_buffer(+, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(1032, 32, 69, 1032))
   Exit: (257) [system] metta_file_buffer(+, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(1032, 32, 69, 1032))=metta_file_buffer(+, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(1032, 32, 69, 1032))
^  Call: (257) [user] assertz(metta_file_buffer(+, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(1032, 32, 69, 1032)))
^  Exit: (257) [user] assertz(metta_file_buffer(+, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(1032, 32, 69, 1032)))
^  Call: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(1032, 32, 69, 1032))))
^  Unify: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(1032, 32, 69, 1032))))
^  Call: (258) [user] use_fast_buffer
^  Unify: (258) [user] use_fast_buffer
   Call: (259) [system] nb_current(may_use_fast_buffer, t)
^  Fail: (258) [user] use_fast_buffer
^  Redo: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(1032, 32, 69, 1032))))
^  Exit: (257) [user] if_t(use_fast_buffer, write_bf(_5892, metta_file_buffer(+, [:, 'if-error', [->, 'Atom', 'Atom', 'Atom', 'Atom']], [], P;HTML|'/home/runner/work/metta-wam/metta-wam/tests/more-anti-regression/minimal-metta/stdlib_minimal.metta', '$stream_position'(1032, 32, 69, 1032))))
   Call: (257) [system] flush_output
   Exit: (257) [system] flush_output
   Call: (257) [system] at_end_of_stream((0x55aefe44e2f0))
   Redo: (257) [system] repeat
   Exit: (257) [system] repeat
^  Call: (257) [user] my_line_count((0x55aefe44e2f0), _285910)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), seek($, 0, current, _286848))
   Call: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(reposition(true))
   Exit: (259) [system] nonvar(reposition(true))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), reposition(true))
   Call: (258) [system] seek((0x55aefe44e2f0), 0, current, _286848)
   Exit: (258) [system] seek((0x55aefe44e2f0), 0, current, 1071)
   Call: (258) [system] fail
^  Redo: (257) [user] my_line_count((0x55aefe44e2f0), _285910)
^  Unify: (257) [user] my_line_count((0x55aefe44e2f0), _285910)
   Call: (258) [system] stream_property((0x55aefe44e2f0), position(_285910))
   Unify: (258) [system] stream_property((0x55aefe44e2f0), position(_285910))
   Call: (259) [system] nonvar((0x55aefe44e2f0))
   Exit: (259) [system] nonvar((0x55aefe44e2f0))
   Call: (259) [system] nonvar(position(_285910))
   Exit: (259) [system] nonvar(position(_285910))
   Exit: (258) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(1071, 34, 37, 1071)))
^  Exit: (257) [user] my_line_count((0x55aefe44e2f0), '$stream_position'(1071, 34, 37, 1071))
   Call: (257) [user] current_read_mode(file, _306328)
   Unify: (257) [user] current_read_mode(file, _306328)
   Call: (258) [system] nb_current(file_mode, _306328)
   Redo: (257) [user] current_read_mode(file, _306328)
   Call: (258) [system] _306328=(+)
   Exit: (258) [system] (+)=(+)
   Exit: (257) [user] current_read_mode(file, +)
^  Call: (257) [user] read_metta2((0x55aefe44e2f0), _312778)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _312778)
^  Call: (258) [user] clause(t_l:s_reader_info(_312778), _314724, _314646)
^  Redo: (257) [user] read_metta2((0x55aefe44e2f0), _312778)
^  Unify: (257) [user] read_metta2((0x55aefe44e2f0), _312778)
^  Call: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (259) [system] string((0x55aefe44e2f0))
^  Redo: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (258) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _312778)
^  Unify: (258) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _312778)
^  Call: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _312778)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _312778)
   Call: (260) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _312778)
^  Unify: (259) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _312778)
   Call: (260) [system] peek_char((0x55aefe44e2f0), _328554)
   Exit: (260) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (260) [system] char_type('\n', space)
   Exit: (260) [system] char_type('\n', space)
   Call: (260) [system] get_char((0x55aefe44e2f0), '\n')
   Exit: (260) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _312778)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _312778)
   Call: (261) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _312778)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _312778)
   Call: (261) [system] peek_char((0x55aefe44e2f0), _338760)
   Exit: (261) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (261) [system] char_type('(', space)
^  Redo: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _312778)
^  Unify: (260) [user] parse_sexpr_metta_IO((0x55aefe44e2f0), _312778)
^  Call: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Unify: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
   Call: (262) [system] string((0x55aefe44e2f0))
^  Redo: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Exit: (261) [user] use_new_parse_sexpr_metta_IO((0x55aefe44e2f0))
^  Call: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _312778)
^  Unify: (261) [user] new_parse_sexpr_metta_IO((0x55aefe44e2f0), _312778)
^  Call: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _312778)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _312778)
   Call: (263) [system] at_end_of_stream((0x55aefe44e2f0))
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _312778)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _312778)
   Call: (263) [system] peek_char((0x55aefe44e2f0), _354514)
   Exit: (263) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (263) [system] char_type('(', space)
^  Redo: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _312778)
^  Unify: (262) [user] new_parse_sexpr_metta_IO1((0x55aefe44e2f0), _312778)
   Call: (263) [system] _359156=(0x55aefe44e2f0)
   Exit: (263) [system] (0x55aefe44e2f0)=(0x55aefe44e2f0)
^  Call: (263) [user] once((read_position((0x55aefe44e2f0), _361024, _361026, _361028, _361030), read_sexpr((0x55aefe44e2f0), _361042), assertz(metta_file_comment(_361024, _361026, _361028, _361042, _361030))))
^  Unify: (263) [system] once(user:(read_position((0x55aefe44e2f0), _361024, _361026, _361028, _361030), read_sexpr((0x55aefe44e2f0), _361042), assertz(metta_file_comment(_361024, _361026, _361028, _361042, _361030))))
^  Call: (265) [user] read_position((0x55aefe44e2f0), _361024, _361026, _361028, _361030)
^  Unify: (265) [user] read_position((0x55aefe44e2f0), _361024, _361026, _361028, _361030)
   Call: (266) [system] stream_property((0x55aefe44e2f0), position(_361030))
   Unify: (266) [system] stream_property((0x55aefe44e2f0), position(_361030))
   Call: (267) [system] nonvar((0x55aefe44e2f0))
   Exit: (267) [system] nonvar((0x55aefe44e2f0))
   Call: (267) [system] nonvar(position(_361030))
   Exit: (267) [system] nonvar(position(_361030))
   Exit: (266) [system] stream_property((0x55aefe44e2f0), position('$stream_position'(1072, 35, 0, 1072)))
   Call: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(1072, 35, 0, 1072), _361024)
   Unify: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(1072, 35, 0, 1072), _361024)
   Call: (267) [system] nonvar(line_count)
   Exit: (267) [system] nonvar(line_count)
   Call: (267) [$syspreds] stream_position_field(line_count, _375012)
   Unify: (267) [$syspreds] stream_position_field(line_count, 2)
   Exit: (267) [$syspreds] stream_position_field(line_count, 2)
   Call: (267) [system] arg(2, '$stream_position'(1072, 35, 0, 1072), _361024)
   Exit: (267) [system] arg(2, '$stream_position'(1072, 35, 0, 1072), 35)
   Exit: (266) [$syspreds] stream_position_data(line_count, '$stream_position'(1072, 35, 0, 1072), 35)
   Call: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(1072, 35, 0, 1072), _361026)
   Unify: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(1072, 35, 0, 1072), _361026)
   Call: (267) [system] nonvar(line_position)
   Exit: (267) [system] nonvar(line_position)
   Call: (267) [$syspreds] stream_position_field(line_position, _384306)
   Unify: (267) [$syspreds] stream_position_field(line_position, 3)
   Exit: (267) [$syspreds] stream_position_field(line_position, 3)
   Call: (267) [system] arg(3, '$stream_position'(1072, 35, 0, 1072), _361026)
   Exit: (267) [system] arg(3, '$stream_position'(1072, 35, 0, 1072), 0)
   Exit: (266) [$syspreds] stream_position_data(line_position, '$stream_position'(1072, 35, 0, 1072), 0)
   Call: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(1072, 35, 0, 1072), _361028)
   Unify: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(1072, 35, 0, 1072), _361028)
   Call: (267) [system] nonvar(char_count)
   Exit: (267) [system] nonvar(char_count)
   Call: (267) [$syspreds] stream_position_field(char_count, _393600)
   Unify: (267) [$syspreds] stream_position_field(char_count, 1)
   Exit: (267) [$syspreds] stream_position_field(char_count, 1)
   Call: (267) [system] arg(1, '$stream_position'(1072, 35, 0, 1072), _361028)
   Exit: (267) [system] arg(1, '$stream_position'(1072, 35, 0, 1072), 1072)
   Exit: (266) [$syspreds] stream_position_data(char_count, '$stream_position'(1072, 35, 0, 1072), 1072)
^  Exit: (265) [user] read_position((0x55aefe44e2f0), 35, 0, 1072, '$stream_position'(1072, 35, 0, 1072))
^  Call: (265) [user] read_sexpr((0x55aefe44e2f0), _361042)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _361042)
   Call: (266) [system] string((0x55aefe44e2f0))
^  Redo: (265) [user] read_sexpr((0x55aefe44e2f0), _361042)
^  Unify: (265) [user] read_sexpr((0x55aefe44e2f0), _361042)
^  Call: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _361042)
^  Unify: (266) [user] cont_sexpr(')', (0x55aefe44e2f0), _361042)
^  Call: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _408470)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (268) [system] '('=(;)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', 'white')
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', end_of_line)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', space)
^  Redo: (268) [user] is_like_space('(')
^  Unify: (268) [user] is_like_space('(')
   Call: (269) [system] char_type('(', cntrl)
^  Redo: (267) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (267) [user] skip_spaces((0x55aefe44e2f0))
   Call: (267) [system] get_char((0x55aefe44e2f0), _425254)
   Exit: (267) [system] get_char((0x55aefe44e2f0), '(')
   Call: (267) [system] '('='('
   Exit: (267) [system] '('='('
^  Call: (267) [user] read_list(')', (0x55aefe44e2f0), _361042)
^  Unify: (267) [user] read_list(')', (0x55aefe44e2f0), _361042)
^  Call: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _432680)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), =)
   Call: (269) [system] (=)=(;)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (269) [user] is_like_space(=)
^  Unify: (269) [user] is_like_space(=)
   Call: (270) [system] char_type(=, 'white')
^  Redo: (269) [user] is_like_space(=)
^  Unify: (269) [user] is_like_space(=)
   Call: (270) [system] char_type(=, end_of_line)
^  Redo: (269) [user] is_like_space(=)
^  Unify: (269) [user] is_like_space(=)
   Call: (270) [system] char_type(=, space)
^  Redo: (269) [user] is_like_space(=)
^  Unify: (269) [user] is_like_space(=)
   Call: (270) [system] char_type(=, cntrl)
^  Redo: (268) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (268) [user] skip_spaces((0x55aefe44e2f0))
   Call: (268) [system] peek_char((0x55aefe44e2f0), _449464)
   Exit: (268) [system] peek_char((0x55aefe44e2f0), =)
   Call: (268) [system] (=)=')'
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _361042)
   Call: (268) [system] (=)=end_of_file
^  Redo: (267) [user] read_list(')', (0x55aefe44e2f0), _361042)
^  Call: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _455042)
^  Unify: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _455042)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _458756)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), =)
   Call: (270) [system] (=)=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(=)
^  Unify: (270) [user] is_like_space(=)
   Call: (271) [system] char_type(=, 'white')
^  Redo: (270) [user] is_like_space(=)
^  Unify: (270) [user] is_like_space(=)
   Call: (271) [system] char_type(=, end_of_line)
^  Redo: (270) [user] is_like_space(=)
^  Unify: (270) [user] is_like_space(=)
   Call: (271) [system] char_type(=, space)
^  Redo: (270) [user] is_like_space(=)
^  Unify: (270) [user] is_like_space(=)
   Call: (271) [system] char_type(=, cntrl)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] get_char((0x55aefe44e2f0), _475540)
   Exit: (269) [system] get_char((0x55aefe44e2f0), =)
   Call: (269) [system] (=)='('
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _455042)
   Call: (269) [system] (=)='['
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _455042)
   Call: (269) [system] (=)='{'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _455042)
   Call: (269) [system] (=)='"'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _455042)
   Call: (269) [system] (=)=!
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _455042)
   Call: (269) [system] (=)='\''
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _455042)
   Call: (269) [system] (=)='`'
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _455042)
   Call: (269) [system] (=)=end_of_file
^  Redo: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), _455042)
^  Call: (269) [user] read_symbolic(')', (0x55aefe44e2f0), =, _455042)
^  Unify: (269) [user] read_symbolic(')', (0x55aefe44e2f0), =, _455042)
^  Call: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _494150)
^  Unify: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _494150)
   Call: (271) [system] peek_char((0x55aefe44e2f0), _496016)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (271) [user] is_delimiter(' ')
^  Unify: (271) [user] is_delimiter(' ')
   Call: (272) [system] char_type(' ', space)
   Exit: (272) [system] char_type(' ', space)
^  Exit: (271) [user] is_delimiter(' ')
   Call: (271) [system] _494150=[]
   Exit: (271) [system] []=[]
^  Exit: (270) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
^  Call: (270) [user] classify_and_convert_charseq(=, [], _455042)
^  Unify: (270) [user] classify_and_convert_charseq(=, [], _455042)
^  Call: (272) [system] setup_call_cleanup('$notrace'(_507182, _507184), once(user:catch(read_from_chars([=], _455042), _507158, fail)), '$restore_trace'(_507182, _507184))
^  Unify: (272) [system] setup_call_cleanup(system:'$notrace'(_507182, _507184), system:once(user:catch(read_from_chars([=], _455042), _507158, fail)), system:'$restore_trace'(_507182, _507184))
^  Call: (273) [system] sig_atomic(system:'$notrace'(_507182, _507184))
^  Exit: (272) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([=], =), _507158, fail)), system:'$restore_trace'(3, -1))
   Call: (271) [system] atomic(=)
   Exit: (271) [system] atomic(=)
^  Exit: (270) [user] classify_and_convert_charseq(=, [], =)
^  Exit: (269) [user] read_symbolic(')', (0x55aefe44e2f0), =, =)
^  Exit: (268) [user] cont_sexpr(')', (0x55aefe44e2f0), =)
^  Call: (268) [user] read_list(')', (0x55aefe44e2f0), _515620)
^  Unify: (268) [user] read_list(')', (0x55aefe44e2f0), _515620)
^  Call: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _519334)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (270) [system] ' '=(;)
^  Redo: (269) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (270) [user] is_like_space(' ')
^  Unify: (270) [user] is_like_space(' ')
   Call: (271) [system] char_type(' ', 'white')
   Exit: (271) [system] char_type(' ', 'white')
^  Exit: (270) [user] is_like_space(' ')
   Call: (270) [system] get_char((0x55aefe44e2f0), _9954)
   Exit: (270) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _13582)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', 'white')
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', end_of_line)
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', space)
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (269) [user] skip_spaces((0x55aefe44e2f0))
   Call: (269) [system] peek_char((0x55aefe44e2f0), _31290)
   Exit: (269) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (269) [system] '('=')'
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _5982)
   Call: (269) [system] '('=end_of_file
^  Redo: (268) [user] read_list(')', (0x55aefe44e2f0), _5982)
^  Call: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _36868)
^  Unify: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), _36868)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _40582)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', 'white')
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', end_of_line)
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', space)
^  Redo: (271) [user] is_like_space('(')
^  Unify: (271) [user] is_like_space('(')
   Call: (272) [system] char_type('(', cntrl)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] get_char((0x55aefe44e2f0), _57366)
   Exit: (270) [system] get_char((0x55aefe44e2f0), '(')
   Call: (270) [system] '('='('
   Exit: (270) [system] '('='('
^  Call: (270) [user] read_list(')', (0x55aefe44e2f0), _36868)
^  Unify: (270) [user] read_list(')', (0x55aefe44e2f0), _36868)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _64792)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), i)
   Call: (272) [system] i=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, 'white')
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, end_of_line)
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, space)
^  Redo: (272) [user] is_like_space(i)
^  Unify: (272) [user] is_like_space(i)
   Call: (273) [system] char_type(i, cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _81576)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), i)
   Call: (271) [system] i=')'
^  Redo: (270) [user] read_list(')', (0x55aefe44e2f0), _36868)
   Call: (271) [system] i=end_of_file
^  Redo: (270) [user] read_list(')', (0x55aefe44e2f0), _36868)
^  Call: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _87154)
^  Unify: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _87154)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _90868)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), i)
   Call: (273) [system] i=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(i)
^  Unify: (273) [user] is_like_space(i)
   Call: (274) [system] char_type(i, 'white')
^  Redo: (273) [user] is_like_space(i)
^  Unify: (273) [user] is_like_space(i)
   Call: (274) [system] char_type(i, end_of_line)
^  Redo: (273) [user] is_like_space(i)
^  Unify: (273) [user] is_like_space(i)
   Call: (274) [system] char_type(i, space)
^  Redo: (273) [user] is_like_space(i)
^  Unify: (273) [user] is_like_space(i)
   Call: (274) [system] char_type(i, cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] get_char((0x55aefe44e2f0), _107652)
   Exit: (272) [system] get_char((0x55aefe44e2f0), i)
   Call: (272) [system] i='('
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _87154)
   Call: (272) [system] i='['
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _87154)
   Call: (272) [system] i='{'
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _87154)
   Call: (272) [system] i='"'
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _87154)
   Call: (272) [system] i=!
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _87154)
   Call: (272) [system] i='\''
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _87154)
   Call: (272) [system] i='`'
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _87154)
   Call: (272) [system] i=end_of_file
^  Redo: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), _87154)
^  Call: (272) [user] read_symbolic(')', (0x55aefe44e2f0), i, _87154)
^  Unify: (272) [user] read_symbolic(')', (0x55aefe44e2f0), i, _87154)
^  Call: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _126262)
^  Unify: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _126262)
   Call: (274) [system] peek_char((0x55aefe44e2f0), _128128)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), f)
^  Call: (274) [user] is_delimiter(f)
^  Unify: (274) [user] is_delimiter(f)
   Call: (275) [system] char_type(f, space)
^  Redo: (274) [user] is_delimiter(f)
   Call: (275) [system] arg(_133768, v('(', ')', end_of_file), f)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _126262)
   Call: (274) [system] ')'==f
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _126262)
   Call: (274) [system] get_char((0x55aefe44e2f0), f)
   Exit: (274) [system] get_char((0x55aefe44e2f0), f)
   Call: (274) [system] f=(\)
^  Redo: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _126262)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _141134)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _141134)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _143000)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), -)
^  Call: (275) [user] is_delimiter(-)
^  Unify: (275) [user] is_delimiter(-)
   Call: (276) [system] char_type(-, space)
^  Redo: (275) [user] is_delimiter(-)
   Call: (276) [system] arg(_148640, v('(', ')', end_of_file), -)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _141134)
   Call: (275) [system] ')'==(-)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _141134)
   Call: (275) [system] get_char((0x55aefe44e2f0), -)
   Exit: (275) [system] get_char((0x55aefe44e2f0), -)
   Call: (275) [system] (-)=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _141134)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _156006)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _156006)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _157872)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (276) [user] is_delimiter(e)
^  Unify: (276) [user] is_delimiter(e)
   Call: (277) [system] char_type(e, space)
^  Redo: (276) [user] is_delimiter(e)
   Call: (277) [system] arg(_163512, v('(', ')', end_of_file), e)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _156006)
   Call: (276) [system] ')'==e
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _156006)
   Call: (276) [system] get_char((0x55aefe44e2f0), e)
   Exit: (276) [system] get_char((0x55aefe44e2f0), e)
   Call: (276) [system] e=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _156006)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _170878)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _170878)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _172744)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (277) [user] is_delimiter(r)
^  Unify: (277) [user] is_delimiter(r)
   Call: (278) [system] char_type(r, space)
^  Redo: (277) [user] is_delimiter(r)
   Call: (278) [system] arg(_178384, v('(', ')', end_of_file), r)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _170878)
   Call: (277) [system] ')'==r
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _170878)
   Call: (277) [system] get_char((0x55aefe44e2f0), r)
   Exit: (277) [system] get_char((0x55aefe44e2f0), r)
   Call: (277) [system] r=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _170878)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _185750)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _185750)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _187616)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (278) [user] is_delimiter(r)
^  Unify: (278) [user] is_delimiter(r)
   Call: (279) [system] char_type(r, space)
^  Redo: (278) [user] is_delimiter(r)
   Call: (279) [system] arg(_193256, v('(', ')', end_of_file), r)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _185750)
   Call: (278) [system] ')'==r
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _185750)
   Call: (278) [system] get_char((0x55aefe44e2f0), r)
   Exit: (278) [system] get_char((0x55aefe44e2f0), r)
   Call: (278) [system] r=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _185750)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _200622)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _200622)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _202488)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (279) [user] is_delimiter(o)
^  Unify: (279) [user] is_delimiter(o)
   Call: (280) [system] char_type(o, space)
^  Redo: (279) [user] is_delimiter(o)
   Call: (280) [system] arg(_208128, v('(', ')', end_of_file), o)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _200622)
   Call: (279) [system] ')'==o
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _200622)
   Call: (279) [system] get_char((0x55aefe44e2f0), o)
   Exit: (279) [system] get_char((0x55aefe44e2f0), o)
   Call: (279) [system] o=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _200622)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _215494)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _215494)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _217360)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (280) [user] is_delimiter(r)
^  Unify: (280) [user] is_delimiter(r)
   Call: (281) [system] char_type(r, space)
^  Redo: (280) [user] is_delimiter(r)
   Call: (281) [system] arg(_223000, v('(', ')', end_of_file), r)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _215494)
   Call: (280) [system] ')'==r
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _215494)
   Call: (280) [system] get_char((0x55aefe44e2f0), r)
   Exit: (280) [system] get_char((0x55aefe44e2f0), r)
   Call: (280) [system] r=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _215494)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _230366)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _230366)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _232232)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (281) [user] is_delimiter(' ')
^  Unify: (281) [user] is_delimiter(' ')
   Call: (282) [system] char_type(' ', space)
   Exit: (282) [system] char_type(' ', space)
^  Exit: (281) [user] is_delimiter(' ')
   Call: (281) [system] _230366=[]
   Exit: (281) [system] []=[]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (280) [system] _215494=[r]
   Exit: (280) [system] [r]=[r]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r])
   Call: (279) [system] _200622=[o, r]
   Exit: (279) [system] [o, r]=[o, r]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, r])
   Call: (278) [system] _185750=[r, o, r]
   Exit: (278) [system] [r, o, r]=[r, o, r]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, o, r])
   Call: (277) [system] _170878=[r, r, o, r]
   Exit: (277) [system] [r, r, o, r]=[r, r, o, r]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, r, o, r])
   Call: (276) [system] _156006=[e, r, r, o, r]
   Exit: (276) [system] [e, r, r, o, r]=[e, r, r, o, r]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, r, r, o, r])
   Call: (275) [system] _141134=[-, e, r, r, o, r]
   Exit: (275) [system] [-, e, r, r, o, r]=[-, e, r, r, o, r]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [-, e, r, r, o, r])
   Call: (274) [system] _126262=[f, -, e, r, r, o, r]
   Exit: (274) [system] [f, -, e, r, r, o, r]=[f, -, e, r, r, o, r]
^  Exit: (273) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [f, -, e, r, r, o, r])
^  Call: (273) [user] classify_and_convert_charseq(i, [f, -, e, r, r, o, r], _87154)
^  Unify: (273) [user] classify_and_convert_charseq(i, [f, -, e, r, r, o, r], _87154)
^  Call: (275) [system] setup_call_cleanup('$notrace'(_262956, _262958), once(user:catch(read_from_chars([i, f, -, e, r, r, o, r], _87154), _262932, fail)), '$restore_trace'(_262956, _262958))
^  Unify: (275) [system] setup_call_cleanup(system:'$notrace'(_262956, _262958), system:once(user:catch(read_from_chars([i, f, -, e, r, r, o, r], _87154), _262932, fail)), system:'$restore_trace'(_262956, _262958))
^  Call: (276) [system] sig_atomic(system:'$notrace'(_262956, _262958))
^  Exit: (275) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([i, f, -, e, r, r, o, r], if-error), _262932, fail)), system:'$restore_trace'(3, -1))
   Call: (274) [system] atomic(if-error)
^  Redo: (273) [user] classify_and_convert_charseq(i, [f, -, e, r, r, o, r], _87154)
^  Unify: (273) [user] classify_and_convert_charseq(i, [f, -, e, r, r, o, r], _87154)
   Call: (274) [system] atom_chars(_87154, [i, f, -, e, r, r, o, r])
   Exit: (274) [system] atom_chars('if-error', [i, f, -, e, r, r, o, r])
^  Exit: (273) [user] classify_and_convert_charseq(i, [f, -, e, r, r, o, r], 'if-error')
^  Exit: (272) [user] read_symbolic(')', (0x55aefe44e2f0), i, 'if-error')
^  Exit: (271) [user] cont_sexpr(')', (0x55aefe44e2f0), 'if-error')
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _274202)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _274202)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _277916)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (273) [system] ' '=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(' ')
^  Unify: (273) [user] is_like_space(' ')
   Call: (274) [system] char_type(' ', 'white')
   Exit: (274) [system] char_type(' ', 'white')
^  Exit: (273) [user] is_like_space(' ')
   Call: (273) [system] get_char((0x55aefe44e2f0), _286574)
   Exit: (273) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _290202)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), $)
   Call: (274) [system] ($)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, 'white')
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, end_of_line)
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, space)
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _307910)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), $)
   Call: (272) [system] ($)=')'
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _274202)
   Call: (272) [system] ($)=end_of_file
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _274202)
^  Call: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _313488)
^  Unify: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _313488)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _317202)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), $)
   Call: (274) [system] ($)=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, 'white')
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, end_of_line)
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, space)
^  Redo: (274) [user] is_like_space($)
^  Unify: (274) [user] is_like_space($)
   Call: (275) [system] char_type($, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] get_char((0x55aefe44e2f0), _333986)
   Exit: (273) [system] get_char((0x55aefe44e2f0), $)
   Call: (273) [system] ($)='('
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _313488)
   Call: (273) [system] ($)='['
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _313488)
   Call: (273) [system] ($)='{'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _313488)
   Call: (273) [system] ($)='"'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _313488)
   Call: (273) [system] ($)=!
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _313488)
   Call: (273) [system] ($)='\''
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _313488)
   Call: (273) [system] ($)='`'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _313488)
   Call: (273) [system] ($)=end_of_file
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _313488)
^  Call: (273) [user] read_symbolic(')', (0x55aefe44e2f0), $, _313488)
^  Unify: (273) [user] read_symbolic(')', (0x55aefe44e2f0), $, _313488)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _352596)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _352596)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _354462)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (275) [user] is_delimiter(a)
^  Unify: (275) [user] is_delimiter(a)
   Call: (276) [system] char_type(a, space)
^  Redo: (275) [user] is_delimiter(a)
   Call: (276) [system] arg(_360102, v('(', ')', end_of_file), a)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _352596)
   Call: (275) [system] ')'==a
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _352596)
   Call: (275) [system] get_char((0x55aefe44e2f0), a)
   Exit: (275) [system] get_char((0x55aefe44e2f0), a)
   Call: (275) [system] a=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _352596)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _367468)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _367468)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _369334)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (276) [user] is_delimiter(t)
^  Unify: (276) [user] is_delimiter(t)
   Call: (277) [system] char_type(t, space)
^  Redo: (276) [user] is_delimiter(t)
   Call: (277) [system] arg(_374974, v('(', ')', end_of_file), t)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _367468)
   Call: (276) [system] ')'==t
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _367468)
   Call: (276) [system] get_char((0x55aefe44e2f0), t)
   Exit: (276) [system] get_char((0x55aefe44e2f0), t)
   Call: (276) [system] t=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _367468)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _382340)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _382340)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _384206)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (277) [user] is_delimiter(o)
^  Unify: (277) [user] is_delimiter(o)
   Call: (278) [system] char_type(o, space)
^  Redo: (277) [user] is_delimiter(o)
   Call: (278) [system] arg(_389846, v('(', ')', end_of_file), o)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _382340)
   Call: (277) [system] ')'==o
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _382340)
   Call: (277) [system] get_char((0x55aefe44e2f0), o)
   Exit: (277) [system] get_char((0x55aefe44e2f0), o)
   Call: (277) [system] o=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _382340)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _397212)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _397212)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _399078)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (278) [user] is_delimiter(m)
^  Unify: (278) [user] is_delimiter(m)
   Call: (279) [system] char_type(m, space)
^  Redo: (278) [user] is_delimiter(m)
   Call: (279) [system] arg(_404718, v('(', ')', end_of_file), m)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _397212)
   Call: (278) [system] ')'==m
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _397212)
   Call: (278) [system] get_char((0x55aefe44e2f0), m)
   Exit: (278) [system] get_char((0x55aefe44e2f0), m)
   Call: (278) [system] m=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _397212)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _412084)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _412084)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _413950)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (279) [user] is_delimiter(' ')
^  Unify: (279) [user] is_delimiter(' ')
   Call: (280) [system] char_type(' ', space)
   Exit: (280) [system] char_type(' ', space)
^  Exit: (279) [user] is_delimiter(' ')
   Call: (279) [system] _412084=[]
   Exit: (279) [system] []=[]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (278) [system] _397212=[m]
   Exit: (278) [system] [m]=[m]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (277) [system] _382340=[o, m]
   Exit: (277) [system] [o, m]=[o, m]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (276) [system] _367468=[t, o, m]
   Exit: (276) [system] [t, o, m]=[t, o, m]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
   Call: (275) [system] _352596=[a, t, o, m]
   Exit: (275) [system] [a, t, o, m]=[a, t, o, m]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, t, o, m])
^  Call: (274) [user] classify_and_convert_charseq($, [a, t, o, m], _313488)
^  Unify: (274) [user] classify_and_convert_charseq($, [a, t, o, m], '$VAR'(_435334))
   Call: (275) [system] atom_chars(_435334, ['_', a, t, o, m])
   Exit: (275) [system] atom_chars('_atom', ['_', a, t, o, m])
^  Exit: (274) [user] classify_and_convert_charseq($, [a, t, o, m], _atom)
^  Exit: (273) [user] read_symbolic(')', (0x55aefe44e2f0), $, _atom)
^  Exit: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _atom)
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _440930)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _440930)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _444644)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (274) [system] ' '=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(' ')
^  Unify: (274) [user] is_like_space(' ')
   Call: (275) [system] char_type(' ', 'white')
   Exit: (275) [system] char_type(' ', 'white')
^  Exit: (274) [user] is_like_space(' ')
   Call: (274) [system] get_char((0x55aefe44e2f0), _453302)
   Exit: (274) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _456930)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), $)
   Call: (275) [system] ($)=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, 'white')
^  Redo: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, end_of_line)
^  Redo: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, space)
^  Redo: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _474638)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), $)
   Call: (273) [system] ($)=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _440930)
   Call: (273) [system] ($)=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _440930)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _480216)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _480216)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _483930)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), $)
   Call: (275) [system] ($)=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, 'white')
^  Redo: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, end_of_line)
^  Redo: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, space)
^  Redo: (275) [user] is_like_space($)
^  Unify: (275) [user] is_like_space($)
   Call: (276) [system] char_type($, cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _500714)
   Exit: (274) [system] get_char((0x55aefe44e2f0), $)
   Call: (274) [system] ($)='('
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _480216)
   Call: (274) [system] ($)='['
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _480216)
   Call: (274) [system] ($)='{'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _480216)
   Call: (274) [system] ($)='"'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _480216)
   Call: (274) [system] ($)=!
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _480216)
   Call: (274) [system] ($)='\''
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _480216)
   Call: (274) [system] ($)='`'
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _480216)
   Call: (274) [system] ($)=end_of_file
^  Redo: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _480216)
^  Call: (274) [user] read_symbolic(')', (0x55aefe44e2f0), $, _480216)
^  Unify: (274) [user] read_symbolic(')', (0x55aefe44e2f0), $, _480216)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _519324)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _519324)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _521190)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (276) [user] is_delimiter(t)
^  Unify: (276) [user] is_delimiter(t)
   Call: (277) [system] char_type(t, space)
^  Redo: (276) [user] is_delimiter(t)
   Call: (277) [system] arg(_8818, v('(', ')', end_of_file), t)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6012)
   Call: (276) [system] ')'==t
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6012)
   Call: (276) [system] get_char((0x55aefe44e2f0), t)
   Exit: (276) [system] get_char((0x55aefe44e2f0), t)
   Call: (276) [system] t=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6012)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _16184)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _16184)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _18050)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), h)
^  Call: (277) [user] is_delimiter(h)
^  Unify: (277) [user] is_delimiter(h)
   Call: (278) [system] char_type(h, space)
^  Redo: (277) [user] is_delimiter(h)
   Call: (278) [system] arg(_23690, v('(', ')', end_of_file), h)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _16184)
   Call: (277) [system] ')'==h
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _16184)
   Call: (277) [system] get_char((0x55aefe44e2f0), h)
   Exit: (277) [system] get_char((0x55aefe44e2f0), h)
   Call: (277) [system] h=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _16184)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31056)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31056)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _32922)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (278) [user] is_delimiter(e)
^  Unify: (278) [user] is_delimiter(e)
   Call: (279) [system] char_type(e, space)
^  Redo: (278) [user] is_delimiter(e)
   Call: (279) [system] arg(_38562, v('(', ')', end_of_file), e)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31056)
   Call: (278) [system] ')'==e
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31056)
   Call: (278) [system] get_char((0x55aefe44e2f0), e)
   Exit: (278) [system] get_char((0x55aefe44e2f0), e)
   Call: (278) [system] e=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _31056)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _45928)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _45928)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _47794)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (279) [user] is_delimiter(n)
^  Unify: (279) [user] is_delimiter(n)
   Call: (280) [system] char_type(n, space)
^  Redo: (279) [user] is_delimiter(n)
   Call: (280) [system] arg(_53434, v('(', ')', end_of_file), n)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _45928)
   Call: (279) [system] ')'==n
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _45928)
   Call: (279) [system] get_char((0x55aefe44e2f0), n)
   Exit: (279) [system] get_char((0x55aefe44e2f0), n)
   Call: (279) [system] n=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _45928)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _60800)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _60800)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _62666)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (280) [user] is_delimiter(' ')
^  Unify: (280) [user] is_delimiter(' ')
   Call: (281) [system] char_type(' ', space)
   Exit: (281) [system] char_type(' ', space)
^  Exit: (280) [user] is_delimiter(' ')
   Call: (280) [system] _60800=[]
   Exit: (280) [system] []=[]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (279) [system] _45928=[n]
   Exit: (279) [system] [n]=[n]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (278) [system] _31056=[e, n]
   Exit: (278) [system] [e, n]=[e, n]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, n])
   Call: (277) [system] _16184=[h, e, n]
   Exit: (277) [system] [h, e, n]=[h, e, n]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [h, e, n])
   Call: (276) [system] _6012=[t, h, e, n]
   Exit: (276) [system] [t, h, e, n]=[t, h, e, n]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, h, e, n])
^  Call: (275) [user] classify_and_convert_charseq($, [t, h, e, n], _6008)
^  Unify: (275) [user] classify_and_convert_charseq($, [t, h, e, n], '$VAR'(_84050))
   Call: (276) [system] atom_chars(_84050, ['_', t, h, e, n])
   Exit: (276) [system] atom_chars('_then', ['_', t, h, e, n])
^  Exit: (275) [user] classify_and_convert_charseq($, [t, h, e, n], _then)
^  Exit: (274) [user] read_symbolic(')', (0x55aefe44e2f0), $, _then)
^  Exit: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _then)
^  Call: (273) [user] read_list(')', (0x55aefe44e2f0), _89646)
^  Unify: (273) [user] read_list(')', (0x55aefe44e2f0), _89646)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _93360)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (275) [system] ' '=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space(' ')
^  Unify: (275) [user] is_like_space(' ')
   Call: (276) [system] char_type(' ', 'white')
   Exit: (276) [system] char_type(' ', 'white')
^  Exit: (275) [user] is_like_space(' ')
   Call: (275) [system] get_char((0x55aefe44e2f0), _102018)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _105646)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), $)
   Call: (276) [system] ($)=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, 'white')
^  Redo: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, end_of_line)
^  Redo: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, space)
^  Redo: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _123354)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), $)
   Call: (274) [system] ($)=')'
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _89646)
   Call: (274) [system] ($)=end_of_file
^  Redo: (273) [user] read_list(')', (0x55aefe44e2f0), _89646)
^  Call: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _128932)
^  Unify: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _128932)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _132646)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), $)
   Call: (276) [system] ($)=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, 'white')
^  Redo: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, end_of_line)
^  Redo: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, space)
^  Redo: (276) [user] is_like_space($)
^  Unify: (276) [user] is_like_space($)
   Call: (277) [system] char_type($, cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] get_char((0x55aefe44e2f0), _149430)
   Exit: (275) [system] get_char((0x55aefe44e2f0), $)
   Call: (275) [system] ($)='('
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _128932)
   Call: (275) [system] ($)='['
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _128932)
   Call: (275) [system] ($)='{'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _128932)
   Call: (275) [system] ($)='"'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _128932)
   Call: (275) [system] ($)=!
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _128932)
   Call: (275) [system] ($)='\''
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _128932)
   Call: (275) [system] ($)='`'
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _128932)
   Call: (275) [system] ($)=end_of_file
^  Redo: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _128932)
^  Call: (275) [user] read_symbolic(')', (0x55aefe44e2f0), $, _128932)
^  Unify: (275) [user] read_symbolic(')', (0x55aefe44e2f0), $, _128932)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _168040)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _168040)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _169906)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (277) [user] is_delimiter(e)
^  Unify: (277) [user] is_delimiter(e)
   Call: (278) [system] char_type(e, space)
^  Redo: (277) [user] is_delimiter(e)
   Call: (278) [system] arg(_175546, v('(', ')', end_of_file), e)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _168040)
   Call: (277) [system] ')'==e
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _168040)
   Call: (277) [system] get_char((0x55aefe44e2f0), e)
   Exit: (277) [system] get_char((0x55aefe44e2f0), e)
   Call: (277) [system] e=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _168040)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _182912)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _182912)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _184778)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (278) [user] is_delimiter(l)
^  Unify: (278) [user] is_delimiter(l)
   Call: (279) [system] char_type(l, space)
^  Redo: (278) [user] is_delimiter(l)
   Call: (279) [system] arg(_190418, v('(', ')', end_of_file), l)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _182912)
   Call: (278) [system] ')'==l
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _182912)
   Call: (278) [system] get_char((0x55aefe44e2f0), l)
   Exit: (278) [system] get_char((0x55aefe44e2f0), l)
   Call: (278) [system] l=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _182912)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _197784)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _197784)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _199650)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (279) [user] is_delimiter(s)
^  Unify: (279) [user] is_delimiter(s)
   Call: (280) [system] char_type(s, space)
^  Redo: (279) [user] is_delimiter(s)
   Call: (280) [system] arg(_205290, v('(', ')', end_of_file), s)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _197784)
   Call: (279) [system] ')'==s
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _197784)
   Call: (279) [system] get_char((0x55aefe44e2f0), s)
   Exit: (279) [system] get_char((0x55aefe44e2f0), s)
   Call: (279) [system] s=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _197784)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _212656)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _212656)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _214522)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (280) [user] is_delimiter(e)
^  Unify: (280) [user] is_delimiter(e)
   Call: (281) [system] char_type(e, space)
^  Redo: (280) [user] is_delimiter(e)
   Call: (281) [system] arg(_220162, v('(', ')', end_of_file), e)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _212656)
   Call: (280) [system] ')'==e
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _212656)
   Call: (280) [system] get_char((0x55aefe44e2f0), e)
   Exit: (280) [system] get_char((0x55aefe44e2f0), e)
   Call: (280) [system] e=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _212656)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _227528)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _227528)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _229394)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (281) [user] is_delimiter(')')
^  Unify: (281) [user] is_delimiter(')')
   Call: (282) [system] char_type(')', space)
^  Redo: (281) [user] is_delimiter(')')
   Call: (282) [system] arg(_235034, v('(', ')', end_of_file), ')')
   Exit: (282) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (281) [user] is_delimiter(')')
   Call: (281) [system] _227528=[]
   Exit: (281) [system] []=[]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (280) [system] _212656=[e]
   Exit: (280) [system] [e]=[e]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e])
   Call: (279) [system] _197784=[s, e]
   Exit: (279) [system] [s, e]=[s, e]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, e])
   Call: (278) [system] _182912=[l, s, e]
   Exit: (278) [system] [l, s, e]=[l, s, e]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l, s, e])
   Call: (277) [system] _168040=[e, l, s, e]
   Exit: (277) [system] [e, l, s, e]=[e, l, s, e]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, l, s, e])
^  Call: (276) [user] classify_and_convert_charseq($, [e, l, s, e], _128932)
^  Unify: (276) [user] classify_and_convert_charseq($, [e, l, s, e], '$VAR'(_252646))
   Call: (277) [system] atom_chars(_252646, ['_', e, l, s, e])
   Exit: (277) [system] atom_chars('_else', ['_', e, l, s, e])
^  Exit: (276) [user] classify_and_convert_charseq($, [e, l, s, e], _else)
^  Exit: (275) [user] read_symbolic(')', (0x55aefe44e2f0), $, _else)
^  Exit: (274) [user] cont_sexpr(')', (0x55aefe44e2f0), _else)
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _258242)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _258242)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _261956)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (276) [system] ')'=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', 'white')
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', end_of_line)
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', space)
^  Redo: (276) [user] is_like_space(')')
^  Unify: (276) [user] is_like_space(')')
   Call: (277) [system] char_type(')', cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _278740)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (275) [system] ')'=')'
   Exit: (275) [system] ')'=')'
   Call: (275) [system] get_char((0x55aefe44e2f0), _282530)
   Exit: (275) [system] get_char((0x55aefe44e2f0), ')')
   Call: (275) [system] _258242=[]
   Exit: (275) [system] []=[]
^  Exit: (274) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (274) [system] _89646=[_else]
   Exit: (274) [system] [_else]=[_else]
^  Exit: (273) [user] read_list(')', (0x55aefe44e2f0), [_else])
   Call: (273) [system] _6004=[_then, _else]
   Exit: (273) [system] [_then, _else]=[_then, _else]
^  Exit: (272) [user] read_list(')', (0x55aefe44e2f0), [_then, _else])
   Call: (272) [system] _5994=[_atom, _then, _else]
   Exit: (272) [system] [_atom, _then, _else]=[_atom, _then, _else]
^  Exit: (271) [user] read_list(')', (0x55aefe44e2f0), [_atom, _then, _else])
   Call: (271) [system] _5986=['if-error', _atom, _then, _else]
   Exit: (271) [system] ['if-error', _atom, _then, _else]=['if-error', _atom, _then, _else]
^  Exit: (270) [user] read_list(')', (0x55aefe44e2f0), ['if-error', _atom, _then, _else])
^  Exit: (269) [user] cont_sexpr(')', (0x55aefe44e2f0), ['if-error', _atom, _then, _else])
^  Call: (269) [user] read_list(')', (0x55aefe44e2f0), _299206)
^  Unify: (269) [user] read_list(')', (0x55aefe44e2f0), _299206)
^  Call: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] peek_char((0x55aefe44e2f0), _302920)
   Exit: (271) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (271) [system] '\n'=(;)
^  Redo: (270) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (271) [user] is_like_space('\n')
^  Unify: (271) [user] is_like_space('\n')
   Call: (272) [system] char_type('\n', 'white')
^  Redo: (271) [user] is_like_space('\n')
^  Unify: (271) [user] is_like_space('\n')
   Call: (272) [system] char_type('\n', end_of_line)
   Exit: (272) [system] char_type('\n', end_of_line)
^  Exit: (271) [user] is_like_space('\n')
   Call: (271) [system] get_char((0x55aefe44e2f0), _314232)
   Exit: (271) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _317860)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (272) [system] ' '=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space(' ')
^  Unify: (272) [user] is_like_space(' ')
   Call: (273) [system] char_type(' ', 'white')
   Exit: (273) [system] char_type(' ', 'white')
^  Exit: (272) [user] is_like_space(' ')
   Call: (272) [system] get_char((0x55aefe44e2f0), _326518)
   Exit: (272) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _330146)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (273) [system] ' '=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(' ')
^  Unify: (273) [user] is_like_space(' ')
   Call: (274) [system] char_type(' ', 'white')
   Exit: (274) [system] char_type(' ', 'white')
^  Exit: (273) [user] is_like_space(' ')
   Call: (273) [system] get_char((0x55aefe44e2f0), _338804)
   Exit: (273) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _342432)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (274) [system] '('=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space('(')
^  Unify: (274) [user] is_like_space('(')
   Call: (275) [system] char_type('(', 'white')
^  Redo: (274) [user] is_like_space('(')
^  Unify: (274) [user] is_like_space('(')
   Call: (275) [system] char_type('(', end_of_line)
^  Redo: (274) [user] is_like_space('(')
^  Unify: (274) [user] is_like_space('(')
   Call: (275) [system] char_type('(', space)
^  Redo: (274) [user] is_like_space('(')
^  Unify: (274) [user] is_like_space('(')
   Call: (275) [system] char_type('(', cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (270) [user] skip_spaces((0x55aefe44e2f0))
   Call: (270) [system] peek_char((0x55aefe44e2f0), _361988)
   Exit: (270) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (270) [system] '('=')'
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _299206)
   Call: (270) [system] '('=end_of_file
^  Redo: (269) [user] read_list(')', (0x55aefe44e2f0), _299206)
^  Call: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _367566)
^  Unify: (270) [user] cont_sexpr(')', (0x55aefe44e2f0), _367566)
^  Call: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _371280)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (272) [system] '('=(;)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', 'white')
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', end_of_line)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', space)
^  Redo: (272) [user] is_like_space('(')
^  Unify: (272) [user] is_like_space('(')
   Call: (273) [system] char_type('(', cntrl)
^  Redo: (271) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (271) [user] skip_spaces((0x55aefe44e2f0))
   Call: (271) [system] get_char((0x55aefe44e2f0), _388064)
   Exit: (271) [system] get_char((0x55aefe44e2f0), '(')
   Call: (271) [system] '('='('
   Exit: (271) [system] '('='('
^  Call: (271) [user] read_list(')', (0x55aefe44e2f0), _367566)
^  Unify: (271) [user] read_list(')', (0x55aefe44e2f0), _367566)
^  Call: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _395490)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), f)
   Call: (273) [system] f=(;)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (273) [user] is_like_space(f)
^  Unify: (273) [user] is_like_space(f)
   Call: (274) [system] char_type(f, 'white')
^  Redo: (273) [user] is_like_space(f)
^  Unify: (273) [user] is_like_space(f)
   Call: (274) [system] char_type(f, end_of_line)
^  Redo: (273) [user] is_like_space(f)
^  Unify: (273) [user] is_like_space(f)
   Call: (274) [system] char_type(f, space)
^  Redo: (273) [user] is_like_space(f)
^  Unify: (273) [user] is_like_space(f)
   Call: (274) [system] char_type(f, cntrl)
^  Redo: (272) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (272) [user] skip_spaces((0x55aefe44e2f0))
   Call: (272) [system] peek_char((0x55aefe44e2f0), _412274)
   Exit: (272) [system] peek_char((0x55aefe44e2f0), f)
   Call: (272) [system] f=')'
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _367566)
   Call: (272) [system] f=end_of_file
^  Redo: (271) [user] read_list(')', (0x55aefe44e2f0), _367566)
^  Call: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _417852)
^  Unify: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _417852)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _421566)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), f)
   Call: (274) [system] f=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(f)
^  Unify: (274) [user] is_like_space(f)
   Call: (275) [system] char_type(f, 'white')
^  Redo: (274) [user] is_like_space(f)
^  Unify: (274) [user] is_like_space(f)
   Call: (275) [system] char_type(f, end_of_line)
^  Redo: (274) [user] is_like_space(f)
^  Unify: (274) [user] is_like_space(f)
   Call: (275) [system] char_type(f, space)
^  Redo: (274) [user] is_like_space(f)
^  Unify: (274) [user] is_like_space(f)
   Call: (275) [system] char_type(f, cntrl)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] get_char((0x55aefe44e2f0), _438350)
   Exit: (273) [system] get_char((0x55aefe44e2f0), f)
   Call: (273) [system] f='('
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _417852)
   Call: (273) [system] f='['
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _417852)
   Call: (273) [system] f='{'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _417852)
   Call: (273) [system] f='"'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _417852)
   Call: (273) [system] f=!
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _417852)
   Call: (273) [system] f='\''
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _417852)
   Call: (273) [system] f='`'
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _417852)
   Call: (273) [system] f=end_of_file
^  Redo: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), _417852)
^  Call: (273) [user] read_symbolic(')', (0x55aefe44e2f0), f, _417852)
^  Unify: (273) [user] read_symbolic(')', (0x55aefe44e2f0), f, _417852)
^  Call: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _456960)
^  Unify: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _456960)
   Call: (275) [system] peek_char((0x55aefe44e2f0), _458826)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), u)
^  Call: (275) [user] is_delimiter(u)
^  Unify: (275) [user] is_delimiter(u)
   Call: (276) [system] char_type(u, space)
^  Redo: (275) [user] is_delimiter(u)
   Call: (276) [system] arg(_464466, v('(', ')', end_of_file), u)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _456960)
   Call: (275) [system] ')'==u
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _456960)
   Call: (275) [system] get_char((0x55aefe44e2f0), u)
   Exit: (275) [system] get_char((0x55aefe44e2f0), u)
   Call: (275) [system] u=(\)
^  Redo: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _456960)
^  Call: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _471832)
^  Unify: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _471832)
   Call: (276) [system] peek_char((0x55aefe44e2f0), _473698)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (276) [user] is_delimiter(n)
^  Unify: (276) [user] is_delimiter(n)
   Call: (277) [system] char_type(n, space)
^  Redo: (276) [user] is_delimiter(n)
   Call: (277) [system] arg(_479338, v('(', ')', end_of_file), n)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _471832)
   Call: (276) [system] ')'==n
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _471832)
   Call: (276) [system] get_char((0x55aefe44e2f0), n)
   Exit: (276) [system] get_char((0x55aefe44e2f0), n)
   Call: (276) [system] n=(\)
^  Redo: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _471832)
^  Call: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _486704)
^  Unify: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _486704)
   Call: (277) [system] peek_char((0x55aefe44e2f0), _488570)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), c)
^  Call: (277) [user] is_delimiter(c)
^  Unify: (277) [user] is_delimiter(c)
   Call: (278) [system] char_type(c, space)
^  Redo: (277) [user] is_delimiter(c)
   Call: (278) [system] arg(_494210, v('(', ')', end_of_file), c)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _486704)
   Call: (277) [system] ')'==c
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _486704)
   Call: (277) [system] get_char((0x55aefe44e2f0), c)
   Exit: (277) [system] get_char((0x55aefe44e2f0), c)
   Call: (277) [system] c=(\)
^  Redo: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _486704)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _501576)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _501576)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _503442)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (278) [user] is_delimiter(t)
^  Unify: (278) [user] is_delimiter(t)
   Call: (279) [system] char_type(t, space)
^  Redo: (278) [user] is_delimiter(t)
   Call: (279) [system] arg(_509082, v('(', ')', end_of_file), t)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _501576)
   Call: (278) [system] ')'==t
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _501576)
   Call: (278) [system] get_char((0x55aefe44e2f0), t)
   Exit: (278) [system] get_char((0x55aefe44e2f0), t)
   Call: (278) [system] t=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _501576)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _516448)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _516448)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _518314)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (279) [user] is_delimiter(i)
^  Unify: (279) [user] is_delimiter(i)
   Call: (280) [system] char_type(i, space)
^  Redo: (279) [user] is_delimiter(i)
   Call: (280) [system] arg(_6124, v('(', ')', end_of_file), i)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6054)
   Call: (279) [system] ')'==i
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6054)
   Call: (279) [system] get_char((0x55aefe44e2f0), i)
   Exit: (279) [system] get_char((0x55aefe44e2f0), i)
   Call: (279) [system] i=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6054)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _13378)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _13378)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _15244)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (280) [user] is_delimiter(o)
^  Unify: (280) [user] is_delimiter(o)
   Call: (281) [system] char_type(o, space)
^  Redo: (280) [user] is_delimiter(o)
   Call: (281) [system] arg(_20884, v('(', ')', end_of_file), o)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _13378)
   Call: (280) [system] ')'==o
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _13378)
   Call: (280) [system] get_char((0x55aefe44e2f0), o)
   Exit: (280) [system] get_char((0x55aefe44e2f0), o)
   Call: (280) [system] o=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _13378)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _28250)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _28250)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _30116)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (281) [user] is_delimiter(n)
^  Unify: (281) [user] is_delimiter(n)
   Call: (282) [system] char_type(n, space)
^  Redo: (281) [user] is_delimiter(n)
   Call: (282) [system] arg(_35756, v('(', ')', end_of_file), n)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _28250)
   Call: (281) [system] ')'==n
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _28250)
   Call: (281) [system] get_char((0x55aefe44e2f0), n)
   Exit: (281) [system] get_char((0x55aefe44e2f0), n)
   Call: (281) [system] n=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _28250)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _43122)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _43122)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _44988)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (282) [user] is_delimiter(' ')
^  Unify: (282) [user] is_delimiter(' ')
   Call: (283) [system] char_type(' ', space)
   Exit: (283) [system] char_type(' ', space)
^  Exit: (282) [user] is_delimiter(' ')
   Call: (282) [system] _43122=[]
   Exit: (282) [system] []=[]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (281) [system] _28250=[n]
   Exit: (281) [system] [n]=[n]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (280) [system] _13378=[o, n]
   Exit: (280) [system] [o, n]=[o, n]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, n])
   Call: (279) [system] _6054=[i, o, n]
   Exit: (279) [system] [i, o, n]=[i, o, n]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, o, n])
   Call: (278) [system] _6050=[t, i, o, n]
   Exit: (278) [system] [t, i, o, n]=[t, i, o, n]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, i, o, n])
   Call: (277) [system] _6046=[c, t, i, o, n]
   Exit: (277) [system] [c, t, i, o, n]=[c, t, i, o, n]
^  Exit: (276) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [c, t, i, o, n])
   Call: (276) [system] _6042=[n, c, t, i, o, n]
   Exit: (276) [system] [n, c, t, i, o, n]=[n, c, t, i, o, n]
^  Exit: (275) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n, c, t, i, o, n])
   Call: (275) [system] _6038=[u, n, c, t, i, o, n]
   Exit: (275) [system] [u, n, c, t, i, o, n]=[u, n, c, t, i, o, n]
^  Exit: (274) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [u, n, c, t, i, o, n])
^  Call: (274) [user] classify_and_convert_charseq(f, [u, n, c, t, i, o, n], _6034)
^  Unify: (274) [user] classify_and_convert_charseq(f, [u, n, c, t, i, o, n], _6034)
^  Call: (276) [system] setup_call_cleanup('$notrace'(_75712, _75714), once(user:catch(read_from_chars([f, u, n, c, t, i, o, n], _6034), _75688, fail)), '$restore_trace'(_75712, _75714))
^  Unify: (276) [system] setup_call_cleanup(system:'$notrace'(_75712, _75714), system:once(user:catch(read_from_chars([f, u, n, c, t, i, o, n], _6034), _75688, fail)), system:'$restore_trace'(_75712, _75714))
^  Call: (277) [system] sig_atomic(system:'$notrace'(_75712, _75714))
^  Exit: (276) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([f, u, n, c, t, i, o, n], function), _75688, fail)), system:'$restore_trace'(3, -1))
   Call: (275) [system] atomic(function)
   Exit: (275) [system] atomic(function)
^  Exit: (274) [user] classify_and_convert_charseq(f, [u, n, c, t, i, o, n], function)
^  Exit: (273) [user] read_symbolic(')', (0x55aefe44e2f0), f, function)
^  Exit: (272) [user] cont_sexpr(')', (0x55aefe44e2f0), function)
^  Call: (272) [user] read_list(')', (0x55aefe44e2f0), _84150)
^  Unify: (272) [user] read_list(')', (0x55aefe44e2f0), _84150)
^  Call: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] peek_char((0x55aefe44e2f0), _87864)
   Exit: (274) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (274) [system] ' '=(;)
^  Redo: (273) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (274) [user] is_like_space(' ')
^  Unify: (274) [user] is_like_space(' ')
   Call: (275) [system] char_type(' ', 'white')
   Exit: (275) [system] char_type(' ', 'white')
^  Exit: (274) [user] is_like_space(' ')
   Call: (274) [system] get_char((0x55aefe44e2f0), _96522)
   Exit: (274) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _100150)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (275) [system] '('=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', 'white')
^  Redo: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', end_of_line)
^  Redo: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', space)
^  Redo: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (273) [user] skip_spaces((0x55aefe44e2f0))
   Call: (273) [system] peek_char((0x55aefe44e2f0), _117858)
   Exit: (273) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (273) [system] '('=')'
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _84150)
   Call: (273) [system] '('=end_of_file
^  Redo: (272) [user] read_list(')', (0x55aefe44e2f0), _84150)
^  Call: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _123436)
^  Unify: (273) [user] cont_sexpr(')', (0x55aefe44e2f0), _123436)
^  Call: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _127150)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (275) [system] '('=(;)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', 'white')
^  Redo: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', end_of_line)
^  Redo: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', space)
^  Redo: (275) [user] is_like_space('(')
^  Unify: (275) [user] is_like_space('(')
   Call: (276) [system] char_type('(', cntrl)
^  Redo: (274) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (274) [user] skip_spaces((0x55aefe44e2f0))
   Call: (274) [system] get_char((0x55aefe44e2f0), _143934)
   Exit: (274) [system] get_char((0x55aefe44e2f0), '(')
   Call: (274) [system] '('='('
   Exit: (274) [system] '('='('
^  Call: (274) [user] read_list(')', (0x55aefe44e2f0), _123436)
^  Unify: (274) [user] read_list(')', (0x55aefe44e2f0), _123436)
^  Call: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _151360)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), c)
   Call: (276) [system] c=(;)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (276) [user] is_like_space(c)
^  Unify: (276) [user] is_like_space(c)
   Call: (277) [system] char_type(c, 'white')
^  Redo: (276) [user] is_like_space(c)
^  Unify: (276) [user] is_like_space(c)
   Call: (277) [system] char_type(c, end_of_line)
^  Redo: (276) [user] is_like_space(c)
^  Unify: (276) [user] is_like_space(c)
   Call: (277) [system] char_type(c, space)
^  Redo: (276) [user] is_like_space(c)
^  Unify: (276) [user] is_like_space(c)
   Call: (277) [system] char_type(c, cntrl)
^  Redo: (275) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (275) [user] skip_spaces((0x55aefe44e2f0))
   Call: (275) [system] peek_char((0x55aefe44e2f0), _168144)
   Exit: (275) [system] peek_char((0x55aefe44e2f0), c)
   Call: (275) [system] c=')'
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _123436)
   Call: (275) [system] c=end_of_file
^  Redo: (274) [user] read_list(')', (0x55aefe44e2f0), _123436)
^  Call: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _173722)
^  Unify: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _173722)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _177436)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), c)
   Call: (277) [system] c=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space(c)
^  Unify: (277) [user] is_like_space(c)
   Call: (278) [system] char_type(c, 'white')
^  Redo: (277) [user] is_like_space(c)
^  Unify: (277) [user] is_like_space(c)
   Call: (278) [system] char_type(c, end_of_line)
^  Redo: (277) [user] is_like_space(c)
^  Unify: (277) [user] is_like_space(c)
   Call: (278) [system] char_type(c, space)
^  Redo: (277) [user] is_like_space(c)
^  Unify: (277) [user] is_like_space(c)
   Call: (278) [system] char_type(c, cntrl)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] get_char((0x55aefe44e2f0), _194220)
   Exit: (276) [system] get_char((0x55aefe44e2f0), c)
   Call: (276) [system] c='('
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _173722)
   Call: (276) [system] c='['
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _173722)
   Call: (276) [system] c='{'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _173722)
   Call: (276) [system] c='"'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _173722)
   Call: (276) [system] c=!
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _173722)
   Call: (276) [system] c='\''
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _173722)
   Call: (276) [system] c='`'
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _173722)
   Call: (276) [system] c=end_of_file
^  Redo: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), _173722)
^  Call: (276) [user] read_symbolic(')', (0x55aefe44e2f0), c, _173722)
^  Unify: (276) [user] read_symbolic(')', (0x55aefe44e2f0), c, _173722)
^  Call: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _212830)
^  Unify: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _212830)
   Call: (278) [system] peek_char((0x55aefe44e2f0), _214696)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), h)
^  Call: (278) [user] is_delimiter(h)
^  Unify: (278) [user] is_delimiter(h)
   Call: (279) [system] char_type(h, space)
^  Redo: (278) [user] is_delimiter(h)
   Call: (279) [system] arg(_220336, v('(', ')', end_of_file), h)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _212830)
   Call: (278) [system] ')'==h
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _212830)
   Call: (278) [system] get_char((0x55aefe44e2f0), h)
   Exit: (278) [system] get_char((0x55aefe44e2f0), h)
   Call: (278) [system] h=(\)
^  Redo: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _212830)
^  Call: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _227702)
^  Unify: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _227702)
   Call: (279) [system] peek_char((0x55aefe44e2f0), _229568)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (279) [user] is_delimiter(a)
^  Unify: (279) [user] is_delimiter(a)
   Call: (280) [system] char_type(a, space)
^  Redo: (279) [user] is_delimiter(a)
   Call: (280) [system] arg(_235208, v('(', ')', end_of_file), a)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _227702)
   Call: (279) [system] ')'==a
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _227702)
   Call: (279) [system] get_char((0x55aefe44e2f0), a)
   Exit: (279) [system] get_char((0x55aefe44e2f0), a)
   Call: (279) [system] a=(\)
^  Redo: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _227702)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _242574)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _242574)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _244440)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (280) [user] is_delimiter(i)
^  Unify: (280) [user] is_delimiter(i)
   Call: (281) [system] char_type(i, space)
^  Redo: (280) [user] is_delimiter(i)
   Call: (281) [system] arg(_250080, v('(', ')', end_of_file), i)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _242574)
   Call: (280) [system] ')'==i
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _242574)
   Call: (280) [system] get_char((0x55aefe44e2f0), i)
   Exit: (280) [system] get_char((0x55aefe44e2f0), i)
   Call: (280) [system] i=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _242574)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _257446)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _257446)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _259312)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (281) [user] is_delimiter(n)
^  Unify: (281) [user] is_delimiter(n)
   Call: (282) [system] char_type(n, space)
^  Redo: (281) [user] is_delimiter(n)
   Call: (282) [system] arg(_264952, v('(', ')', end_of_file), n)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _257446)
   Call: (281) [system] ')'==n
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _257446)
   Call: (281) [system] get_char((0x55aefe44e2f0), n)
   Exit: (281) [system] get_char((0x55aefe44e2f0), n)
   Call: (281) [system] n=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _257446)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _272318)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _272318)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _274184)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (282) [user] is_delimiter(' ')
^  Unify: (282) [user] is_delimiter(' ')
   Call: (283) [system] char_type(' ', space)
   Exit: (283) [system] char_type(' ', space)
^  Exit: (282) [user] is_delimiter(' ')
   Call: (282) [system] _272318=[]
   Exit: (282) [system] []=[]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (281) [system] _257446=[n]
   Exit: (281) [system] [n]=[n]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (280) [system] _242574=[i, n]
   Exit: (280) [system] [i, n]=[i, n]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, n])
   Call: (279) [system] _227702=[a, i, n]
   Exit: (279) [system] [a, i, n]=[a, i, n]
^  Exit: (278) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, i, n])
   Call: (278) [system] _212830=[h, a, i, n]
   Exit: (278) [system] [h, a, i, n]=[h, a, i, n]
^  Exit: (277) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [h, a, i, n])
^  Call: (277) [user] classify_and_convert_charseq(c, [h, a, i, n], _173722)
^  Unify: (277) [user] classify_and_convert_charseq(c, [h, a, i, n], _173722)
^  Call: (279) [system] setup_call_cleanup('$notrace'(_296526, _296528), once(user:catch(read_from_chars([c, h, a, i, n], _173722), _296502, fail)), '$restore_trace'(_296526, _296528))
^  Unify: (279) [system] setup_call_cleanup(system:'$notrace'(_296526, _296528), system:once(user:catch(read_from_chars([c, h, a, i, n], _173722), _296502, fail)), system:'$restore_trace'(_296526, _296528))
^  Call: (280) [system] sig_atomic(system:'$notrace'(_296526, _296528))
^  Exit: (279) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([c, h, a, i, n], chain), _296502, fail)), system:'$restore_trace'(3, -1))
   Call: (278) [system] atomic(chain)
   Exit: (278) [system] atomic(chain)
^  Exit: (277) [user] classify_and_convert_charseq(c, [h, a, i, n], chain)
^  Exit: (276) [user] read_symbolic(')', (0x55aefe44e2f0), c, chain)
^  Exit: (275) [user] cont_sexpr(')', (0x55aefe44e2f0), chain)
^  Call: (275) [user] read_list(')', (0x55aefe44e2f0), _304964)
^  Unify: (275) [user] read_list(')', (0x55aefe44e2f0), _304964)
^  Call: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _308678)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (277) [system] ' '=(;)
^  Redo: (276) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (277) [user] is_like_space(' ')
^  Unify: (277) [user] is_like_space(' ')
   Call: (278) [system] char_type(' ', 'white')
   Exit: (278) [system] char_type(' ', 'white')
^  Exit: (277) [user] is_like_space(' ')
   Call: (277) [system] get_char((0x55aefe44e2f0), _317336)
   Exit: (277) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _320964)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (278) [system] '('=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', 'white')
^  Redo: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', end_of_line)
^  Redo: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', space)
^  Redo: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', cntrl)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (276) [user] skip_spaces((0x55aefe44e2f0))
   Call: (276) [system] peek_char((0x55aefe44e2f0), _338672)
   Exit: (276) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (276) [system] '('=')'
^  Redo: (275) [user] read_list(')', (0x55aefe44e2f0), _304964)
   Call: (276) [system] '('=end_of_file
^  Redo: (275) [user] read_list(')', (0x55aefe44e2f0), _304964)
^  Call: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _344250)
^  Unify: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), _344250)
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _347964)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (278) [system] '('=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', 'white')
^  Redo: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', end_of_line)
^  Redo: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', space)
^  Redo: (278) [user] is_like_space('(')
^  Unify: (278) [user] is_like_space('(')
   Call: (279) [system] char_type('(', cntrl)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] get_char((0x55aefe44e2f0), _364748)
   Exit: (277) [system] get_char((0x55aefe44e2f0), '(')
   Call: (277) [system] '('='('
   Exit: (277) [system] '('='('
^  Call: (277) [user] read_list(')', (0x55aefe44e2f0), _344250)
^  Unify: (277) [user] read_list(')', (0x55aefe44e2f0), _344250)
^  Call: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _372174)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), e)
   Call: (279) [system] e=(;)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (279) [user] is_like_space(e)
^  Unify: (279) [user] is_like_space(e)
   Call: (280) [system] char_type(e, 'white')
^  Redo: (279) [user] is_like_space(e)
^  Unify: (279) [user] is_like_space(e)
   Call: (280) [system] char_type(e, end_of_line)
^  Redo: (279) [user] is_like_space(e)
^  Unify: (279) [user] is_like_space(e)
   Call: (280) [system] char_type(e, space)
^  Redo: (279) [user] is_like_space(e)
^  Unify: (279) [user] is_like_space(e)
   Call: (280) [system] char_type(e, cntrl)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _388958)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), e)
   Call: (278) [system] e=')'
^  Redo: (277) [user] read_list(')', (0x55aefe44e2f0), _344250)
   Call: (278) [system] e=end_of_file
^  Redo: (277) [user] read_list(')', (0x55aefe44e2f0), _344250)
^  Call: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _394536)
^  Unify: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _394536)
^  Call: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] peek_char((0x55aefe44e2f0), _398250)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), e)
   Call: (280) [system] e=(;)
^  Redo: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (280) [user] is_like_space(e)
^  Unify: (280) [user] is_like_space(e)
   Call: (281) [system] char_type(e, 'white')
^  Redo: (280) [user] is_like_space(e)
^  Unify: (280) [user] is_like_space(e)
   Call: (281) [system] char_type(e, end_of_line)
^  Redo: (280) [user] is_like_space(e)
^  Unify: (280) [user] is_like_space(e)
   Call: (281) [system] char_type(e, space)
^  Redo: (280) [user] is_like_space(e)
^  Unify: (280) [user] is_like_space(e)
   Call: (281) [system] char_type(e, cntrl)
^  Redo: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] get_char((0x55aefe44e2f0), _415034)
   Exit: (279) [system] get_char((0x55aefe44e2f0), e)
   Call: (279) [system] e='('
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _394536)
   Call: (279) [system] e='['
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _394536)
   Call: (279) [system] e='{'
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _394536)
   Call: (279) [system] e='"'
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _394536)
   Call: (279) [system] e=!
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _394536)
   Call: (279) [system] e='\''
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _394536)
   Call: (279) [system] e='`'
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _394536)
   Call: (279) [system] e=end_of_file
^  Redo: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _394536)
^  Call: (279) [user] read_symbolic(')', (0x55aefe44e2f0), e, _394536)
^  Unify: (279) [user] read_symbolic(')', (0x55aefe44e2f0), e, _394536)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _433644)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _433644)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _435510)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), v)
^  Call: (281) [user] is_delimiter(v)
^  Unify: (281) [user] is_delimiter(v)
   Call: (282) [system] char_type(v, space)
^  Redo: (281) [user] is_delimiter(v)
   Call: (282) [system] arg(_441150, v('(', ')', end_of_file), v)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _433644)
   Call: (281) [system] ')'==v
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _433644)
   Call: (281) [system] get_char((0x55aefe44e2f0), v)
   Exit: (281) [system] get_char((0x55aefe44e2f0), v)
   Call: (281) [system] v=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _433644)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _448516)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _448516)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _450382)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (282) [user] is_delimiter(a)
^  Unify: (282) [user] is_delimiter(a)
   Call: (283) [system] char_type(a, space)
^  Redo: (282) [user] is_delimiter(a)
   Call: (283) [system] arg(_456022, v('(', ')', end_of_file), a)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _448516)
   Call: (282) [system] ')'==a
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _448516)
   Call: (282) [system] get_char((0x55aefe44e2f0), a)
   Exit: (282) [system] get_char((0x55aefe44e2f0), a)
   Call: (282) [system] a=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _448516)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _463388)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _463388)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _465254)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (283) [user] is_delimiter(l)
^  Unify: (283) [user] is_delimiter(l)
   Call: (284) [system] char_type(l, space)
^  Redo: (283) [user] is_delimiter(l)
   Call: (284) [system] arg(_470894, v('(', ')', end_of_file), l)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _463388)
   Call: (283) [system] ')'==l
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _463388)
   Call: (283) [system] get_char((0x55aefe44e2f0), l)
   Exit: (283) [system] get_char((0x55aefe44e2f0), l)
   Call: (283) [system] l=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _463388)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _478260)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _478260)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _480126)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (284) [user] is_delimiter(' ')
^  Unify: (284) [user] is_delimiter(' ')
   Call: (285) [system] char_type(' ', space)
   Exit: (285) [system] char_type(' ', space)
^  Exit: (284) [user] is_delimiter(' ')
   Call: (284) [system] _478260=[]
   Exit: (284) [system] []=[]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (283) [system] _463388=[l]
   Exit: (283) [system] [l]=[l]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l])
   Call: (282) [system] _448516=[a, l]
   Exit: (282) [system] [a, l]=[a, l]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, l])
   Call: (281) [system] _433644=[v, a, l]
   Exit: (281) [system] [v, a, l]=[v, a, l]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [v, a, l])
^  Call: (280) [user] classify_and_convert_charseq(e, [v, a, l], _394536)
^  Unify: (280) [user] classify_and_convert_charseq(e, [v, a, l], _394536)
^  Call: (282) [system] setup_call_cleanup('$notrace'(_499674, _499676), once(user:catch(read_from_chars([e, v, a, l], _394536), _499650, fail)), '$restore_trace'(_499674, _499676))
^  Unify: (282) [system] setup_call_cleanup(system:'$notrace'(_499674, _499676), system:once(user:catch(read_from_chars([e, v, a, l], _394536), _499650, fail)), system:'$restore_trace'(_499674, _499676))
^  Call: (283) [system] sig_atomic(system:'$notrace'(_499674, _499676))
^  Exit: (282) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([e, v, a, l], eval), _499650, fail)), system:'$restore_trace'(3, -1))
   Call: (281) [system] atomic(eval)
   Exit: (281) [system] atomic(eval)
^  Exit: (280) [user] classify_and_convert_charseq(e, [v, a, l], eval)
^  Exit: (279) [user] read_symbolic(')', (0x55aefe44e2f0), e, eval)
^  Exit: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), eval)
^  Call: (278) [user] read_list(')', (0x55aefe44e2f0), _508112)
^  Unify: (278) [user] read_list(')', (0x55aefe44e2f0), _508112)
^  Call: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] peek_char((0x55aefe44e2f0), _511826)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (280) [system] ' '=(;)
^  Redo: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (280) [user] is_like_space(' ')
^  Unify: (280) [user] is_like_space(' ')
   Call: (281) [system] char_type(' ', 'white')
   Exit: (281) [system] char_type(' ', 'white')
^  Exit: (280) [user] is_like_space(' ')
   Call: (280) [system] get_char((0x55aefe44e2f0), _520484)
   Exit: (280) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (281) [system] peek_char((0x55aefe44e2f0), _6066)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (281) [system] '('=(;)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (281) [user] is_like_space('(')
^  Unify: (281) [user] is_like_space('(')
   Call: (282) [system] char_type('(', 'white')
^  Redo: (281) [user] is_like_space('(')
^  Unify: (281) [user] is_like_space('(')
   Call: (282) [system] char_type('(', end_of_line)
^  Redo: (281) [user] is_like_space('(')
^  Unify: (281) [user] is_like_space('(')
   Call: (282) [system] char_type('(', space)
^  Redo: (281) [user] is_like_space('(')
^  Unify: (281) [user] is_like_space('(')
   Call: (282) [system] char_type('(', cntrl)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _23740)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (279) [system] '('=')'
^  Redo: (278) [user] read_list(')', (0x55aefe44e2f0), _6060)
   Call: (279) [system] '('=end_of_file
^  Redo: (278) [user] read_list(')', (0x55aefe44e2f0), _6060)
^  Call: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _29318)
^  Unify: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), _29318)
^  Call: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (281) [system] peek_char((0x55aefe44e2f0), _33032)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (281) [system] '('=(;)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (281) [user] is_like_space('(')
^  Unify: (281) [user] is_like_space('(')
   Call: (282) [system] char_type('(', 'white')
^  Redo: (281) [user] is_like_space('(')
^  Unify: (281) [user] is_like_space('(')
   Call: (282) [system] char_type('(', end_of_line)
^  Redo: (281) [user] is_like_space('(')
^  Unify: (281) [user] is_like_space('(')
   Call: (282) [system] char_type('(', space)
^  Redo: (281) [user] is_like_space('(')
^  Unify: (281) [user] is_like_space('(')
   Call: (282) [system] char_type('(', cntrl)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] get_char((0x55aefe44e2f0), _49816)
   Exit: (280) [system] get_char((0x55aefe44e2f0), '(')
   Call: (280) [system] '('='('
   Exit: (280) [system] '('='('
^  Call: (280) [user] read_list(')', (0x55aefe44e2f0), _29318)
^  Unify: (280) [user] read_list(')', (0x55aefe44e2f0), _29318)
^  Call: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (281) [user] skip_spaces((0x55aefe44e2f0))
   Call: (282) [system] peek_char((0x55aefe44e2f0), _57242)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), g)
   Call: (282) [system] g=(;)
^  Redo: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (282) [user] is_like_space(g)
^  Unify: (282) [user] is_like_space(g)
   Call: (283) [system] char_type(g, 'white')
^  Redo: (282) [user] is_like_space(g)
^  Unify: (282) [user] is_like_space(g)
   Call: (283) [system] char_type(g, end_of_line)
^  Redo: (282) [user] is_like_space(g)
^  Unify: (282) [user] is_like_space(g)
   Call: (283) [system] char_type(g, space)
^  Redo: (282) [user] is_like_space(g)
^  Unify: (282) [user] is_like_space(g)
   Call: (283) [system] char_type(g, cntrl)
^  Redo: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (281) [user] skip_spaces((0x55aefe44e2f0))
   Call: (281) [system] peek_char((0x55aefe44e2f0), _74026)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), g)
   Call: (281) [system] g=')'
^  Redo: (280) [user] read_list(')', (0x55aefe44e2f0), _29318)
   Call: (281) [system] g=end_of_file
^  Redo: (280) [user] read_list(')', (0x55aefe44e2f0), _29318)
^  Call: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _79604)
^  Unify: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _79604)
^  Call: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (283) [system] peek_char((0x55aefe44e2f0), _83318)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), g)
   Call: (283) [system] g=(;)
^  Redo: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (283) [user] is_like_space(g)
^  Unify: (283) [user] is_like_space(g)
   Call: (284) [system] char_type(g, 'white')
^  Redo: (283) [user] is_like_space(g)
^  Unify: (283) [user] is_like_space(g)
   Call: (284) [system] char_type(g, end_of_line)
^  Redo: (283) [user] is_like_space(g)
^  Unify: (283) [user] is_like_space(g)
   Call: (284) [system] char_type(g, space)
^  Redo: (283) [user] is_like_space(g)
^  Unify: (283) [user] is_like_space(g)
   Call: (284) [system] char_type(g, cntrl)
^  Redo: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (282) [system] get_char((0x55aefe44e2f0), _100102)
   Exit: (282) [system] get_char((0x55aefe44e2f0), g)
   Call: (282) [system] g='('
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _79604)
   Call: (282) [system] g='['
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _79604)
   Call: (282) [system] g='{'
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _79604)
   Call: (282) [system] g='"'
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _79604)
   Call: (282) [system] g=!
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _79604)
   Call: (282) [system] g='\''
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _79604)
   Call: (282) [system] g='`'
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _79604)
   Call: (282) [system] g=end_of_file
^  Redo: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _79604)
^  Call: (282) [user] read_symbolic(')', (0x55aefe44e2f0), g, _79604)
^  Unify: (282) [user] read_symbolic(')', (0x55aefe44e2f0), g, _79604)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _118712)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _118712)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _120578)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (284) [user] is_delimiter(e)
^  Unify: (284) [user] is_delimiter(e)
   Call: (285) [system] char_type(e, space)
^  Redo: (284) [user] is_delimiter(e)
   Call: (285) [system] arg(_126218, v('(', ')', end_of_file), e)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _118712)
   Call: (284) [system] ')'==e
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _118712)
   Call: (284) [system] get_char((0x55aefe44e2f0), e)
   Exit: (284) [system] get_char((0x55aefe44e2f0), e)
   Call: (284) [system] e=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _118712)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _133584)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _133584)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _135450)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (285) [user] is_delimiter(t)
^  Unify: (285) [user] is_delimiter(t)
   Call: (286) [system] char_type(t, space)
^  Redo: (285) [user] is_delimiter(t)
   Call: (286) [system] arg(_141090, v('(', ')', end_of_file), t)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _133584)
   Call: (285) [system] ')'==t
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _133584)
   Call: (285) [system] get_char((0x55aefe44e2f0), t)
   Exit: (285) [system] get_char((0x55aefe44e2f0), t)
   Call: (285) [system] t=(\)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _133584)
^  Call: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _148456)
^  Unify: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _148456)
   Call: (286) [system] peek_char((0x55aefe44e2f0), _150322)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), -)
^  Call: (286) [user] is_delimiter(-)
^  Unify: (286) [user] is_delimiter(-)
   Call: (287) [system] char_type(-, space)
^  Redo: (286) [user] is_delimiter(-)
   Call: (287) [system] arg(_155962, v('(', ')', end_of_file), -)
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _148456)
   Call: (286) [system] ')'==(-)
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _148456)
   Call: (286) [system] get_char((0x55aefe44e2f0), -)
   Exit: (286) [system] get_char((0x55aefe44e2f0), -)
   Call: (286) [system] (-)=(\)
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _148456)
^  Call: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _163328)
^  Unify: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _163328)
   Call: (287) [system] peek_char((0x55aefe44e2f0), _165194)
   Exit: (287) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (287) [user] is_delimiter(m)
^  Unify: (287) [user] is_delimiter(m)
   Call: (288) [system] char_type(m, space)
^  Redo: (287) [user] is_delimiter(m)
   Call: (288) [system] arg(_170834, v('(', ')', end_of_file), m)
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _163328)
   Call: (287) [system] ')'==m
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _163328)
   Call: (287) [system] get_char((0x55aefe44e2f0), m)
   Exit: (287) [system] get_char((0x55aefe44e2f0), m)
   Call: (287) [system] m=(\)
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _163328)
^  Call: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _178200)
^  Unify: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _178200)
   Call: (288) [system] peek_char((0x55aefe44e2f0), _180066)
   Exit: (288) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (288) [user] is_delimiter(e)
^  Unify: (288) [user] is_delimiter(e)
   Call: (289) [system] char_type(e, space)
^  Redo: (288) [user] is_delimiter(e)
   Call: (289) [system] arg(_185706, v('(', ')', end_of_file), e)
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _178200)
   Call: (288) [system] ')'==e
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _178200)
   Call: (288) [system] get_char((0x55aefe44e2f0), e)
   Exit: (288) [system] get_char((0x55aefe44e2f0), e)
   Call: (288) [system] e=(\)
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _178200)
^  Call: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _193072)
^  Unify: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _193072)
   Call: (289) [system] peek_char((0x55aefe44e2f0), _194938)
   Exit: (289) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (289) [user] is_delimiter(t)
^  Unify: (289) [user] is_delimiter(t)
   Call: (290) [system] char_type(t, space)
^  Redo: (289) [user] is_delimiter(t)
   Call: (290) [system] arg(_200578, v('(', ')', end_of_file), t)
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _193072)
   Call: (289) [system] ')'==t
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _193072)
   Call: (289) [system] get_char((0x55aefe44e2f0), t)
   Exit: (289) [system] get_char((0x55aefe44e2f0), t)
   Call: (289) [system] t=(\)
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _193072)
^  Call: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _207944)
^  Unify: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _207944)
   Call: (290) [system] peek_char((0x55aefe44e2f0), _209810)
   Exit: (290) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (290) [user] is_delimiter(a)
^  Unify: (290) [user] is_delimiter(a)
   Call: (291) [system] char_type(a, space)
^  Redo: (290) [user] is_delimiter(a)
   Call: (291) [system] arg(_215450, v('(', ')', end_of_file), a)
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _207944)
   Call: (290) [system] ')'==a
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _207944)
   Call: (290) [system] get_char((0x55aefe44e2f0), a)
   Exit: (290) [system] get_char((0x55aefe44e2f0), a)
   Call: (290) [system] a=(\)
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _207944)
^  Call: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _222816)
^  Unify: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _222816)
   Call: (291) [system] peek_char((0x55aefe44e2f0), _224682)
   Exit: (291) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (291) [user] is_delimiter(t)
^  Unify: (291) [user] is_delimiter(t)
   Call: (292) [system] char_type(t, space)
^  Redo: (291) [user] is_delimiter(t)
   Call: (292) [system] arg(_230322, v('(', ')', end_of_file), t)
^  Redo: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _222816)
   Call: (291) [system] ')'==t
^  Redo: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _222816)
   Call: (291) [system] get_char((0x55aefe44e2f0), t)
   Exit: (291) [system] get_char((0x55aefe44e2f0), t)
   Call: (291) [system] t=(\)
^  Redo: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _222816)
^  Call: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237688)
^  Unify: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237688)
   Call: (292) [system] peek_char((0x55aefe44e2f0), _239554)
   Exit: (292) [system] peek_char((0x55aefe44e2f0), y)
^  Call: (292) [user] is_delimiter(y)
^  Unify: (292) [user] is_delimiter(y)
   Call: (293) [system] char_type(y, space)
^  Redo: (292) [user] is_delimiter(y)
   Call: (293) [system] arg(_245194, v('(', ')', end_of_file), y)
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237688)
   Call: (292) [system] ')'==y
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237688)
   Call: (292) [system] get_char((0x55aefe44e2f0), y)
   Exit: (292) [system] get_char((0x55aefe44e2f0), y)
   Call: (292) [system] y=(\)
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237688)
^  Call: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _252560)
^  Unify: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _252560)
   Call: (293) [system] peek_char((0x55aefe44e2f0), _254426)
   Exit: (293) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (293) [user] is_delimiter(p)
^  Unify: (293) [user] is_delimiter(p)
   Call: (294) [system] char_type(p, space)
^  Redo: (293) [user] is_delimiter(p)
   Call: (294) [system] arg(_260066, v('(', ')', end_of_file), p)
^  Redo: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _252560)
   Call: (293) [system] ')'==p
^  Redo: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _252560)
   Call: (293) [system] get_char((0x55aefe44e2f0), p)
   Exit: (293) [system] get_char((0x55aefe44e2f0), p)
   Call: (293) [system] p=(\)
^  Redo: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _252560)
^  Call: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _267432)
^  Unify: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _267432)
   Call: (294) [system] peek_char((0x55aefe44e2f0), _269298)
   Exit: (294) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (294) [user] is_delimiter(e)
^  Unify: (294) [user] is_delimiter(e)
   Call: (295) [system] char_type(e, space)
^  Redo: (294) [user] is_delimiter(e)
   Call: (295) [system] arg(_274938, v('(', ')', end_of_file), e)
^  Redo: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _267432)
   Call: (294) [system] ')'==e
^  Redo: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _267432)
   Call: (294) [system] get_char((0x55aefe44e2f0), e)
   Exit: (294) [system] get_char((0x55aefe44e2f0), e)
   Call: (294) [system] e=(\)
^  Redo: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _267432)
^  Call: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _282304)
^  Unify: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _282304)
   Call: (295) [system] peek_char((0x55aefe44e2f0), _284170)
   Exit: (295) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (295) [user] is_delimiter(' ')
^  Unify: (295) [user] is_delimiter(' ')
   Call: (296) [system] char_type(' ', space)
   Exit: (296) [system] char_type(' ', space)
^  Exit: (295) [user] is_delimiter(' ')
   Call: (295) [system] _282304=[]
   Exit: (295) [system] []=[]
^  Exit: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (294) [system] _267432=[e]
   Exit: (294) [system] [e]=[e]
^  Exit: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e])
   Call: (293) [system] _252560=[p, e]
   Exit: (293) [system] [p, e]=[p, e]
^  Exit: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, e])
   Call: (292) [system] _237688=[y, p, e]
   Exit: (292) [system] [y, p, e]=[y, p, e]
^  Exit: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [y, p, e])
   Call: (291) [system] _222816=[t, y, p, e]
   Exit: (291) [system] [t, y, p, e]=[t, y, p, e]
^  Exit: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, y, p, e])
   Call: (290) [system] _207944=[a, t, y, p, e]
   Exit: (290) [system] [a, t, y, p, e]=[a, t, y, p, e]
^  Exit: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, t, y, p, e])
   Call: (289) [system] _193072=[t, a, t, y, p, e]
   Exit: (289) [system] [t, a, t, y, p, e]=[t, a, t, y, p, e]
^  Exit: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, a, t, y, p, e])
   Call: (288) [system] _178200=[e, t, a, t, y, p, e]
   Exit: (288) [system] [e, t, a, t, y, p, e]=[e, t, a, t, y, p, e]
^  Exit: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, t, a, t, y, p, e])
   Call: (287) [system] _163328=[m, e, t, a, t, y, p, e]
   Exit: (287) [system] [m, e, t, a, t, y, p, e]=[m, e, t, a, t, y, p, e]
^  Exit: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m, e, t, a, t, y, p, e])
   Call: (286) [system] _148456=[-, m, e, t, a, t, y, p, e]
   Exit: (286) [system] [-, m, e, t, a, t, y, p, e]=[-, m, e, t, a, t, y, p, e]
^  Exit: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [-, m, e, t, a, t, y, p, e])
   Call: (285) [system] _133584=[t, -, m, e, t, a, t, y, p, e]
   Exit: (285) [system] [t, -, m, e, t, a, t, y, p, e]=[t, -, m, e, t, a, t, y, p, e]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, -, m, e, t, a, t, y, p, e])
   Call: (284) [system] _118712=[e, t, -, m, e, t, a, t, y, p, e]
   Exit: (284) [system] [e, t, -, m, e, t, a, t, y, p, e]=[e, t, -, m, e, t, a, t, y, p, e]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, t, -, m, e, t, a, t, y, p, e])
^  Call: (283) [user] classify_and_convert_charseq(g, [e, t, -, m, e, t, a, t, y, p, e], _79604)
^  Unify: (283) [user] classify_and_convert_charseq(g, [e, t, -, m, e, t, a, t, y, p, e], _79604)
^  Call: (285) [system] setup_call_cleanup('$notrace'(_326070, _326072), once(user:catch(read_from_chars([g, e, t, -, m, e, t, a, t, y, p, e], _79604), _326046, fail)), '$restore_trace'(_326070, _326072))
^  Unify: (285) [system] setup_call_cleanup(system:'$notrace'(_326070, _326072), system:once(user:catch(read_from_chars([g, e, t, -, m, e, t, a, t, y, p, e], _79604), _326046, fail)), system:'$restore_trace'(_326070, _326072))
^  Call: (286) [system] sig_atomic(system:'$notrace'(_326070, _326072))
^  Exit: (285) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([g, e, t, -, m, e, t, a, t, y, p, e], get-metatype), _326046, fail)), system:'$restore_trace'(3, -1))
   Call: (284) [system] atomic(get-metatype)
^  Redo: (283) [user] classify_and_convert_charseq(g, [e, t, -, m, e, t, a, t, y, p, e], _79604)
^  Unify: (283) [user] classify_and_convert_charseq(g, [e, t, -, m, e, t, a, t, y, p, e], _79604)
   Call: (284) [system] atom_chars(_79604, [g, e, t, -, m, e, t, a, t, y, p, e])
   Exit: (284) [system] atom_chars('get-metatype', [g, e, t, -, m, e, t, a, t, y, p, e])
^  Exit: (283) [user] classify_and_convert_charseq(g, [e, t, -, m, e, t, a, t, y, p, e], 'get-metatype')
^  Exit: (282) [user] read_symbolic(')', (0x55aefe44e2f0), g, 'get-metatype')
^  Exit: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), 'get-metatype')
^  Call: (281) [user] read_list(')', (0x55aefe44e2f0), _337316)
^  Unify: (281) [user] read_list(')', (0x55aefe44e2f0), _337316)
^  Call: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (283) [system] peek_char((0x55aefe44e2f0), _341030)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (283) [system] ' '=(;)
^  Redo: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (283) [user] is_like_space(' ')
^  Unify: (283) [user] is_like_space(' ')
   Call: (284) [system] char_type(' ', 'white')
   Exit: (284) [system] char_type(' ', 'white')
^  Exit: (283) [user] is_like_space(' ')
   Call: (283) [system] get_char((0x55aefe44e2f0), _349688)
   Exit: (283) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (283) [user] skip_spaces((0x55aefe44e2f0))
   Call: (284) [system] peek_char((0x55aefe44e2f0), _353316)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), $)
   Call: (284) [system] ($)=(;)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (284) [user] is_like_space($)
^  Unify: (284) [user] is_like_space($)
   Call: (285) [system] char_type($, 'white')
^  Redo: (284) [user] is_like_space($)
^  Unify: (284) [user] is_like_space($)
   Call: (285) [system] char_type($, end_of_line)
^  Redo: (284) [user] is_like_space($)
^  Unify: (284) [user] is_like_space($)
   Call: (285) [system] char_type($, space)
^  Redo: (284) [user] is_like_space($)
^  Unify: (284) [user] is_like_space($)
   Call: (285) [system] char_type($, cntrl)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (282) [system] peek_char((0x55aefe44e2f0), _371024)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), $)
   Call: (282) [system] ($)=')'
^  Redo: (281) [user] read_list(')', (0x55aefe44e2f0), _337316)
   Call: (282) [system] ($)=end_of_file
^  Redo: (281) [user] read_list(')', (0x55aefe44e2f0), _337316)
^  Call: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _376602)
^  Unify: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _376602)
^  Call: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (283) [user] skip_spaces((0x55aefe44e2f0))
   Call: (284) [system] peek_char((0x55aefe44e2f0), _380316)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), $)
   Call: (284) [system] ($)=(;)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (284) [user] is_like_space($)
^  Unify: (284) [user] is_like_space($)
   Call: (285) [system] char_type($, 'white')
^  Redo: (284) [user] is_like_space($)
^  Unify: (284) [user] is_like_space($)
   Call: (285) [system] char_type($, end_of_line)
^  Redo: (284) [user] is_like_space($)
^  Unify: (284) [user] is_like_space($)
   Call: (285) [system] char_type($, space)
^  Redo: (284) [user] is_like_space($)
^  Unify: (284) [user] is_like_space($)
   Call: (285) [system] char_type($, cntrl)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (283) [user] skip_spaces((0x55aefe44e2f0))
   Call: (283) [system] get_char((0x55aefe44e2f0), _397100)
   Exit: (283) [system] get_char((0x55aefe44e2f0), $)
   Call: (283) [system] ($)='('
^  Redo: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _376602)
   Call: (283) [system] ($)='['
^  Redo: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _376602)
   Call: (283) [system] ($)='{'
^  Redo: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _376602)
   Call: (283) [system] ($)='"'
^  Redo: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _376602)
   Call: (283) [system] ($)=!
^  Redo: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _376602)
   Call: (283) [system] ($)='\''
^  Redo: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _376602)
   Call: (283) [system] ($)='`'
^  Redo: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _376602)
   Call: (283) [system] ($)=end_of_file
^  Redo: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _376602)
^  Call: (283) [user] read_symbolic(')', (0x55aefe44e2f0), $, _376602)
^  Unify: (283) [user] read_symbolic(')', (0x55aefe44e2f0), $, _376602)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _415710)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _415710)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _417576)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (285) [user] is_delimiter(a)
^  Unify: (285) [user] is_delimiter(a)
   Call: (286) [system] char_type(a, space)
^  Redo: (285) [user] is_delimiter(a)
   Call: (286) [system] arg(_423216, v('(', ')', end_of_file), a)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _415710)
   Call: (285) [system] ')'==a
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _415710)
   Call: (285) [system] get_char((0x55aefe44e2f0), a)
   Exit: (285) [system] get_char((0x55aefe44e2f0), a)
   Call: (285) [system] a=(\)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _415710)
^  Call: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430582)
^  Unify: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430582)
   Call: (286) [system] peek_char((0x55aefe44e2f0), _432448)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (286) [user] is_delimiter(t)
^  Unify: (286) [user] is_delimiter(t)
   Call: (287) [system] char_type(t, space)
^  Redo: (286) [user] is_delimiter(t)
   Call: (287) [system] arg(_438088, v('(', ')', end_of_file), t)
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430582)
   Call: (286) [system] ')'==t
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430582)
   Call: (286) [system] get_char((0x55aefe44e2f0), t)
   Exit: (286) [system] get_char((0x55aefe44e2f0), t)
   Call: (286) [system] t=(\)
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430582)
^  Call: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445454)
^  Unify: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445454)
   Call: (287) [system] peek_char((0x55aefe44e2f0), _447320)
   Exit: (287) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (287) [user] is_delimiter(o)
^  Unify: (287) [user] is_delimiter(o)
   Call: (288) [system] char_type(o, space)
^  Redo: (287) [user] is_delimiter(o)
   Call: (288) [system] arg(_452960, v('(', ')', end_of_file), o)
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445454)
   Call: (287) [system] ')'==o
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445454)
   Call: (287) [system] get_char((0x55aefe44e2f0), o)
   Exit: (287) [system] get_char((0x55aefe44e2f0), o)
   Call: (287) [system] o=(\)
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445454)
^  Call: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _460326)
^  Unify: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _460326)
   Call: (288) [system] peek_char((0x55aefe44e2f0), _462192)
   Exit: (288) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (288) [user] is_delimiter(m)
^  Unify: (288) [user] is_delimiter(m)
   Call: (289) [system] char_type(m, space)
^  Redo: (288) [user] is_delimiter(m)
   Call: (289) [system] arg(_467832, v('(', ')', end_of_file), m)
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _460326)
   Call: (288) [system] ')'==m
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _460326)
   Call: (288) [system] get_char((0x55aefe44e2f0), m)
   Exit: (288) [system] get_char((0x55aefe44e2f0), m)
   Call: (288) [system] m=(\)
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _460326)
^  Call: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _475198)
^  Unify: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _475198)
   Call: (289) [system] peek_char((0x55aefe44e2f0), _477064)
   Exit: (289) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (289) [user] is_delimiter(')')
^  Unify: (289) [user] is_delimiter(')')
   Call: (290) [system] char_type(')', space)
^  Redo: (289) [user] is_delimiter(')')
   Call: (290) [system] arg(_482704, v('(', ')', end_of_file), ')')
   Exit: (290) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (289) [user] is_delimiter(')')
   Call: (289) [system] _475198=[]
   Exit: (289) [system] []=[]
^  Exit: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (288) [system] _460326=[m]
   Exit: (288) [system] [m]=[m]
^  Exit: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (287) [system] _445454=[o, m]
   Exit: (287) [system] [o, m]=[o, m]
^  Exit: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (286) [system] _430582=[t, o, m]
   Exit: (286) [system] [t, o, m]=[t, o, m]
^  Exit: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
   Call: (285) [system] _415710=[a, t, o, m]
   Exit: (285) [system] [a, t, o, m]=[a, t, o, m]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, t, o, m])
^  Call: (284) [user] classify_and_convert_charseq($, [a, t, o, m], _376602)
^  Unify: (284) [user] classify_and_convert_charseq($, [a, t, o, m], '$VAR'(_500316))
   Call: (285) [system] atom_chars(_500316, ['_', a, t, o, m])
   Exit: (285) [system] atom_chars('_atom', ['_', a, t, o, m])
^  Exit: (284) [user] classify_and_convert_charseq($, [a, t, o, m], _atom)
^  Exit: (283) [user] read_symbolic(')', (0x55aefe44e2f0), $, _atom)
^  Exit: (282) [user] cont_sexpr(')', (0x55aefe44e2f0), _atom)
^  Call: (282) [user] read_list(')', (0x55aefe44e2f0), _505912)
^  Unify: (282) [user] read_list(')', (0x55aefe44e2f0), _505912)
^  Call: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (283) [user] skip_spaces((0x55aefe44e2f0))
   Call: (284) [system] peek_char((0x55aefe44e2f0), _509626)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (284) [system] ')'=(;)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (284) [user] is_like_space(')')
^  Unify: (284) [user] is_like_space(')')
   Call: (285) [system] char_type(')', 'white')
^  Redo: (284) [user] is_like_space(')')
^  Unify: (284) [user] is_like_space(')')
   Call: (285) [system] char_type(')', end_of_line)
^  Redo: (284) [user] is_like_space(')')
^  Unify: (284) [user] is_like_space(')')
   Call: (285) [system] char_type(')', space)
^  Redo: (284) [user] is_like_space(')')
^  Unify: (284) [user] is_like_space(')')
   Call: (285) [system] char_type(')', cntrl)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (283) [user] skip_spaces((0x55aefe44e2f0))
   Call: (283) [system] peek_char((0x55aefe44e2f0), _8568)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (283) [system] ')'=')'
   Exit: (283) [system] ')'=')'
   Call: (283) [system] get_char((0x55aefe44e2f0), _12358)
   Exit: (283) [system] get_char((0x55aefe44e2f0), ')')
   Call: (283) [system] _6082=[]
   Exit: (283) [system] []=[]
^  Exit: (282) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (282) [system] _6072=[_atom]
   Exit: (282) [system] [_atom]=[_atom]
^  Exit: (281) [user] read_list(')', (0x55aefe44e2f0), [_atom])
   Call: (281) [system] _6064=['get-metatype', _atom]
   Exit: (281) [system] ['get-metatype', _atom]=['get-metatype', _atom]
^  Exit: (280) [user] read_list(')', (0x55aefe44e2f0), ['get-metatype', _atom])
^  Exit: (279) [user] cont_sexpr(')', (0x55aefe44e2f0), ['get-metatype', _atom])
^  Call: (279) [user] read_list(')', (0x55aefe44e2f0), _23446)
^  Unify: (279) [user] read_list(')', (0x55aefe44e2f0), _23446)
^  Call: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (281) [system] peek_char((0x55aefe44e2f0), _27160)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (281) [system] ')'=(;)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (281) [user] is_like_space(')')
^  Unify: (281) [user] is_like_space(')')
   Call: (282) [system] char_type(')', 'white')
^  Redo: (281) [user] is_like_space(')')
^  Unify: (281) [user] is_like_space(')')
   Call: (282) [system] char_type(')', end_of_line)
^  Redo: (281) [user] is_like_space(')')
^  Unify: (281) [user] is_like_space(')')
   Call: (282) [system] char_type(')', space)
^  Redo: (281) [user] is_like_space(')')
^  Unify: (281) [user] is_like_space(')')
   Call: (282) [system] char_type(')', cntrl)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] peek_char((0x55aefe44e2f0), _43944)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (280) [system] ')'=')'
   Exit: (280) [system] ')'=')'
   Call: (280) [system] get_char((0x55aefe44e2f0), _47734)
   Exit: (280) [system] get_char((0x55aefe44e2f0), ')')
   Call: (280) [system] _23446=[]
   Exit: (280) [system] []=[]
^  Exit: (279) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (279) [system] _6060=[['get-metatype', _atom]]
   Exit: (279) [system] [['get-metatype', _atom]]=[['get-metatype', _atom]]
^  Exit: (278) [user] read_list(')', (0x55aefe44e2f0), [['get-metatype', _atom]])
   Call: (278) [system] _6052=[eval, ['get-metatype', _atom]]
   Exit: (278) [system] [eval, ['get-metatype', _atom]]=[eval, ['get-metatype', _atom]]
^  Exit: (277) [user] read_list(')', (0x55aefe44e2f0), [eval, ['get-metatype', _atom]])
^  Exit: (276) [user] cont_sexpr(')', (0x55aefe44e2f0), [eval, ['get-metatype', _atom]])
^  Call: (276) [user] read_list(')', (0x55aefe44e2f0), _58822)
^  Unify: (276) [user] read_list(')', (0x55aefe44e2f0), _58822)
^  Call: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _62536)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (278) [system] ' '=(;)
^  Redo: (277) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (278) [user] is_like_space(' ')
^  Unify: (278) [user] is_like_space(' ')
   Call: (279) [system] char_type(' ', 'white')
   Exit: (279) [system] char_type(' ', 'white')
^  Exit: (278) [user] is_like_space(' ')
   Call: (278) [system] get_char((0x55aefe44e2f0), _71194)
   Exit: (278) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _74822)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), $)
   Call: (279) [system] ($)=(;)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (279) [user] is_like_space($)
^  Unify: (279) [user] is_like_space($)
   Call: (280) [system] char_type($, 'white')
^  Redo: (279) [user] is_like_space($)
^  Unify: (279) [user] is_like_space($)
   Call: (280) [system] char_type($, end_of_line)
^  Redo: (279) [user] is_like_space($)
^  Unify: (279) [user] is_like_space($)
   Call: (280) [system] char_type($, space)
^  Redo: (279) [user] is_like_space($)
^  Unify: (279) [user] is_like_space($)
   Call: (280) [system] char_type($, cntrl)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (277) [user] skip_spaces((0x55aefe44e2f0))
   Call: (277) [system] peek_char((0x55aefe44e2f0), _92530)
   Exit: (277) [system] peek_char((0x55aefe44e2f0), $)
   Call: (277) [system] ($)=')'
^  Redo: (276) [user] read_list(')', (0x55aefe44e2f0), _58822)
   Call: (277) [system] ($)=end_of_file
^  Redo: (276) [user] read_list(')', (0x55aefe44e2f0), _58822)
^  Call: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _98108)
^  Unify: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _98108)
^  Call: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _101822)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), $)
   Call: (279) [system] ($)=(;)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (279) [user] is_like_space($)
^  Unify: (279) [user] is_like_space($)
   Call: (280) [system] char_type($, 'white')
^  Redo: (279) [user] is_like_space($)
^  Unify: (279) [user] is_like_space($)
   Call: (280) [system] char_type($, end_of_line)
^  Redo: (279) [user] is_like_space($)
^  Unify: (279) [user] is_like_space($)
   Call: (280) [system] char_type($, space)
^  Redo: (279) [user] is_like_space($)
^  Unify: (279) [user] is_like_space($)
   Call: (280) [system] char_type($, cntrl)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] get_char((0x55aefe44e2f0), _118606)
   Exit: (278) [system] get_char((0x55aefe44e2f0), $)
   Call: (278) [system] ($)='('
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _98108)
   Call: (278) [system] ($)='['
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _98108)
   Call: (278) [system] ($)='{'
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _98108)
   Call: (278) [system] ($)='"'
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _98108)
   Call: (278) [system] ($)=!
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _98108)
   Call: (278) [system] ($)='\''
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _98108)
   Call: (278) [system] ($)='`'
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _98108)
   Call: (278) [system] ($)=end_of_file
^  Redo: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _98108)
^  Call: (278) [user] read_symbolic(')', (0x55aefe44e2f0), $, _98108)
^  Unify: (278) [user] read_symbolic(')', (0x55aefe44e2f0), $, _98108)
^  Call: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137216)
^  Unify: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137216)
   Call: (280) [system] peek_char((0x55aefe44e2f0), _139082)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (280) [user] is_delimiter(m)
^  Unify: (280) [user] is_delimiter(m)
   Call: (281) [system] char_type(m, space)
^  Redo: (280) [user] is_delimiter(m)
   Call: (281) [system] arg(_144722, v('(', ')', end_of_file), m)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137216)
   Call: (280) [system] ')'==m
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137216)
   Call: (280) [system] get_char((0x55aefe44e2f0), m)
   Exit: (280) [system] get_char((0x55aefe44e2f0), m)
   Call: (280) [system] m=(\)
^  Redo: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _137216)
^  Call: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152088)
^  Unify: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152088)
   Call: (281) [system] peek_char((0x55aefe44e2f0), _153954)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (281) [user] is_delimiter(e)
^  Unify: (281) [user] is_delimiter(e)
   Call: (282) [system] char_type(e, space)
^  Redo: (281) [user] is_delimiter(e)
   Call: (282) [system] arg(_159594, v('(', ')', end_of_file), e)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152088)
   Call: (281) [system] ')'==e
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152088)
   Call: (281) [system] get_char((0x55aefe44e2f0), e)
   Exit: (281) [system] get_char((0x55aefe44e2f0), e)
   Call: (281) [system] e=(\)
^  Redo: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _152088)
^  Call: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _166960)
^  Unify: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _166960)
   Call: (282) [system] peek_char((0x55aefe44e2f0), _168826)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (282) [user] is_delimiter(t)
^  Unify: (282) [user] is_delimiter(t)
   Call: (283) [system] char_type(t, space)
^  Redo: (282) [user] is_delimiter(t)
   Call: (283) [system] arg(_174466, v('(', ')', end_of_file), t)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _166960)
   Call: (282) [system] ')'==t
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _166960)
   Call: (282) [system] get_char((0x55aefe44e2f0), t)
   Exit: (282) [system] get_char((0x55aefe44e2f0), t)
   Call: (282) [system] t=(\)
^  Redo: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _166960)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _181832)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _181832)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _183698)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (283) [user] is_delimiter(a)
^  Unify: (283) [user] is_delimiter(a)
   Call: (284) [system] char_type(a, space)
^  Redo: (283) [user] is_delimiter(a)
   Call: (284) [system] arg(_189338, v('(', ')', end_of_file), a)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _181832)
   Call: (283) [system] ')'==a
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _181832)
   Call: (283) [system] get_char((0x55aefe44e2f0), a)
   Exit: (283) [system] get_char((0x55aefe44e2f0), a)
   Call: (283) [system] a=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _181832)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _196704)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _196704)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _198570)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), '\n')
^  Call: (284) [user] is_delimiter('\n')
^  Unify: (284) [user] is_delimiter('\n')
   Call: (285) [system] char_type('\n', space)
   Exit: (285) [system] char_type('\n', space)
^  Exit: (284) [user] is_delimiter('\n')
   Call: (284) [system] _196704=[]
   Exit: (284) [system] []=[]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (283) [system] _181832=[a]
   Exit: (283) [system] [a]=[a]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a])
   Call: (282) [system] _166960=[t, a]
   Exit: (282) [system] [t, a]=[t, a]
^  Exit: (281) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, a])
   Call: (281) [system] _152088=[e, t, a]
   Exit: (281) [system] [e, t, a]=[e, t, a]
^  Exit: (280) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, t, a])
   Call: (280) [system] _137216=[m, e, t, a]
   Exit: (280) [system] [m, e, t, a]=[m, e, t, a]
^  Exit: (279) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m, e, t, a])
^  Call: (279) [user] classify_and_convert_charseq($, [m, e, t, a], _98108)
^  Unify: (279) [user] classify_and_convert_charseq($, [m, e, t, a], '$VAR'(_219954))
   Call: (280) [system] atom_chars(_219954, ['_', m, e, t, a])
   Exit: (280) [system] atom_chars('_meta', ['_', m, e, t, a])
^  Exit: (279) [user] classify_and_convert_charseq($, [m, e, t, a], _meta)
^  Exit: (278) [user] read_symbolic(')', (0x55aefe44e2f0), $, _meta)
^  Exit: (277) [user] cont_sexpr(')', (0x55aefe44e2f0), _meta)
^  Call: (277) [user] read_list(')', (0x55aefe44e2f0), _225550)
^  Unify: (277) [user] read_list(')', (0x55aefe44e2f0), _225550)
^  Call: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] peek_char((0x55aefe44e2f0), _229264)
   Exit: (279) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (279) [system] '\n'=(;)
^  Redo: (278) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (279) [user] is_like_space('\n')
^  Unify: (279) [user] is_like_space('\n')
   Call: (280) [system] char_type('\n', 'white')
^  Redo: (279) [user] is_like_space('\n')
^  Unify: (279) [user] is_like_space('\n')
   Call: (280) [system] char_type('\n', end_of_line)
   Exit: (280) [system] char_type('\n', end_of_line)
^  Exit: (279) [user] is_like_space('\n')
   Call: (279) [system] get_char((0x55aefe44e2f0), _240576)
   Exit: (279) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] peek_char((0x55aefe44e2f0), _244204)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (280) [system] ' '=(;)
^  Redo: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (280) [user] is_like_space(' ')
^  Unify: (280) [user] is_like_space(' ')
   Call: (281) [system] char_type(' ', 'white')
   Exit: (281) [system] char_type(' ', 'white')
^  Exit: (280) [user] is_like_space(' ')
   Call: (280) [system] get_char((0x55aefe44e2f0), _252862)
   Exit: (280) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (281) [system] peek_char((0x55aefe44e2f0), _256490)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (281) [system] ' '=(;)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (281) [user] is_like_space(' ')
^  Unify: (281) [user] is_like_space(' ')
   Call: (282) [system] char_type(' ', 'white')
   Exit: (282) [system] char_type(' ', 'white')
^  Exit: (281) [user] is_like_space(' ')
   Call: (281) [system] get_char((0x55aefe44e2f0), _265148)
   Exit: (281) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (281) [user] skip_spaces((0x55aefe44e2f0))
   Call: (282) [system] peek_char((0x55aefe44e2f0), _268776)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (282) [system] ' '=(;)
^  Redo: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (282) [user] is_like_space(' ')
^  Unify: (282) [user] is_like_space(' ')
   Call: (283) [system] char_type(' ', 'white')
   Exit: (283) [system] char_type(' ', 'white')
^  Exit: (282) [user] is_like_space(' ')
   Call: (282) [system] get_char((0x55aefe44e2f0), _277434)
   Exit: (282) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (283) [system] peek_char((0x55aefe44e2f0), _281062)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (283) [system] ' '=(;)
^  Redo: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (283) [user] is_like_space(' ')
^  Unify: (283) [user] is_like_space(' ')
   Call: (284) [system] char_type(' ', 'white')
   Exit: (284) [system] char_type(' ', 'white')
^  Exit: (283) [user] is_like_space(' ')
   Call: (283) [system] get_char((0x55aefe44e2f0), _289720)
   Exit: (283) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (283) [user] skip_spaces((0x55aefe44e2f0))
   Call: (284) [system] peek_char((0x55aefe44e2f0), _293348)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (284) [system] '('=(;)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (284) [user] is_like_space('(')
^  Unify: (284) [user] is_like_space('(')
   Call: (285) [system] char_type('(', 'white')
^  Redo: (284) [user] is_like_space('(')
^  Unify: (284) [user] is_like_space('(')
   Call: (285) [system] char_type('(', end_of_line)
^  Redo: (284) [user] is_like_space('(')
^  Unify: (284) [user] is_like_space('(')
   Call: (285) [system] char_type('(', space)
^  Redo: (284) [user] is_like_space('(')
^  Unify: (284) [user] is_like_space('(')
   Call: (285) [system] char_type('(', cntrl)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (278) [user] skip_spaces((0x55aefe44e2f0))
   Call: (278) [system] peek_char((0x55aefe44e2f0), _314752)
   Exit: (278) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (278) [system] '('=')'
^  Redo: (277) [user] read_list(')', (0x55aefe44e2f0), _225550)
   Call: (278) [system] '('=end_of_file
^  Redo: (277) [user] read_list(')', (0x55aefe44e2f0), _225550)
^  Call: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _320330)
^  Unify: (278) [user] cont_sexpr(')', (0x55aefe44e2f0), _320330)
^  Call: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] peek_char((0x55aefe44e2f0), _324044)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (280) [system] '('=(;)
^  Redo: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (280) [user] is_like_space('(')
^  Unify: (280) [user] is_like_space('(')
   Call: (281) [system] char_type('(', 'white')
^  Redo: (280) [user] is_like_space('(')
^  Unify: (280) [user] is_like_space('(')
   Call: (281) [system] char_type('(', end_of_line)
^  Redo: (280) [user] is_like_space('(')
^  Unify: (280) [user] is_like_space('(')
   Call: (281) [system] char_type('(', space)
^  Redo: (280) [user] is_like_space('(')
^  Unify: (280) [user] is_like_space('(')
   Call: (281) [system] char_type('(', cntrl)
^  Redo: (279) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (279) [user] skip_spaces((0x55aefe44e2f0))
   Call: (279) [system] get_char((0x55aefe44e2f0), _340828)
   Exit: (279) [system] get_char((0x55aefe44e2f0), '(')
   Call: (279) [system] '('='('
   Exit: (279) [system] '('='('
^  Call: (279) [user] read_list(')', (0x55aefe44e2f0), _320330)
^  Unify: (279) [user] read_list(')', (0x55aefe44e2f0), _320330)
^  Call: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (281) [system] peek_char((0x55aefe44e2f0), _348254)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), e)
   Call: (281) [system] e=(;)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (281) [user] is_like_space(e)
^  Unify: (281) [user] is_like_space(e)
   Call: (282) [system] char_type(e, 'white')
^  Redo: (281) [user] is_like_space(e)
^  Unify: (281) [user] is_like_space(e)
   Call: (282) [system] char_type(e, end_of_line)
^  Redo: (281) [user] is_like_space(e)
^  Unify: (281) [user] is_like_space(e)
   Call: (282) [system] char_type(e, space)
^  Redo: (281) [user] is_like_space(e)
^  Unify: (281) [user] is_like_space(e)
   Call: (282) [system] char_type(e, cntrl)
^  Redo: (280) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (280) [user] skip_spaces((0x55aefe44e2f0))
   Call: (280) [system] peek_char((0x55aefe44e2f0), _365038)
   Exit: (280) [system] peek_char((0x55aefe44e2f0), e)
   Call: (280) [system] e=')'
^  Redo: (279) [user] read_list(')', (0x55aefe44e2f0), _320330)
   Call: (280) [system] e=end_of_file
^  Redo: (279) [user] read_list(')', (0x55aefe44e2f0), _320330)
^  Call: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), _370616)
^  Unify: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), _370616)
^  Call: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (281) [user] skip_spaces((0x55aefe44e2f0))
   Call: (282) [system] peek_char((0x55aefe44e2f0), _374330)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), e)
   Call: (282) [system] e=(;)
^  Redo: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (282) [user] is_like_space(e)
^  Unify: (282) [user] is_like_space(e)
   Call: (283) [system] char_type(e, 'white')
^  Redo: (282) [user] is_like_space(e)
^  Unify: (282) [user] is_like_space(e)
   Call: (283) [system] char_type(e, end_of_line)
^  Redo: (282) [user] is_like_space(e)
^  Unify: (282) [user] is_like_space(e)
   Call: (283) [system] char_type(e, space)
^  Redo: (282) [user] is_like_space(e)
^  Unify: (282) [user] is_like_space(e)
   Call: (283) [system] char_type(e, cntrl)
^  Redo: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (281) [user] skip_spaces((0x55aefe44e2f0))
   Call: (281) [system] get_char((0x55aefe44e2f0), _391114)
   Exit: (281) [system] get_char((0x55aefe44e2f0), e)
   Call: (281) [system] e='('
^  Redo: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), _370616)
   Call: (281) [system] e='['
^  Redo: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), _370616)
   Call: (281) [system] e='{'
^  Redo: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), _370616)
   Call: (281) [system] e='"'
^  Redo: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), _370616)
   Call: (281) [system] e=!
^  Redo: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), _370616)
   Call: (281) [system] e='\''
^  Redo: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), _370616)
   Call: (281) [system] e='`'
^  Redo: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), _370616)
   Call: (281) [system] e=end_of_file
^  Redo: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), _370616)
^  Call: (281) [user] read_symbolic(')', (0x55aefe44e2f0), e, _370616)
^  Unify: (281) [user] read_symbolic(')', (0x55aefe44e2f0), e, _370616)
^  Call: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _409724)
^  Unify: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _409724)
   Call: (283) [system] peek_char((0x55aefe44e2f0), _411590)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), v)
^  Call: (283) [user] is_delimiter(v)
^  Unify: (283) [user] is_delimiter(v)
   Call: (284) [system] char_type(v, space)
^  Redo: (283) [user] is_delimiter(v)
   Call: (284) [system] arg(_417230, v('(', ')', end_of_file), v)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _409724)
   Call: (283) [system] ')'==v
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _409724)
   Call: (283) [system] get_char((0x55aefe44e2f0), v)
   Exit: (283) [system] get_char((0x55aefe44e2f0), v)
   Call: (283) [system] v=(\)
^  Redo: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _409724)
^  Call: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _424596)
^  Unify: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _424596)
   Call: (284) [system] peek_char((0x55aefe44e2f0), _426462)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (284) [user] is_delimiter(a)
^  Unify: (284) [user] is_delimiter(a)
   Call: (285) [system] char_type(a, space)
^  Redo: (284) [user] is_delimiter(a)
   Call: (285) [system] arg(_432102, v('(', ')', end_of_file), a)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _424596)
   Call: (284) [system] ')'==a
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _424596)
   Call: (284) [system] get_char((0x55aefe44e2f0), a)
   Exit: (284) [system] get_char((0x55aefe44e2f0), a)
   Call: (284) [system] a=(\)
^  Redo: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _424596)
^  Call: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _439468)
^  Unify: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _439468)
   Call: (285) [system] peek_char((0x55aefe44e2f0), _441334)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (285) [user] is_delimiter(l)
^  Unify: (285) [user] is_delimiter(l)
   Call: (286) [system] char_type(l, space)
^  Redo: (285) [user] is_delimiter(l)
   Call: (286) [system] arg(_446974, v('(', ')', end_of_file), l)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _439468)
   Call: (285) [system] ')'==l
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _439468)
   Call: (285) [system] get_char((0x55aefe44e2f0), l)
   Exit: (285) [system] get_char((0x55aefe44e2f0), l)
   Call: (285) [system] l=(\)
^  Redo: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _439468)
^  Call: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _454340)
^  Unify: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _454340)
   Call: (286) [system] peek_char((0x55aefe44e2f0), _456206)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (286) [user] is_delimiter(' ')
^  Unify: (286) [user] is_delimiter(' ')
   Call: (287) [system] char_type(' ', space)
   Exit: (287) [system] char_type(' ', space)
^  Exit: (286) [user] is_delimiter(' ')
   Call: (286) [system] _454340=[]
   Exit: (286) [system] []=[]
^  Exit: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (285) [system] _439468=[l]
   Exit: (285) [system] [l]=[l]
^  Exit: (284) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l])
   Call: (284) [system] _424596=[a, l]
   Exit: (284) [system] [a, l]=[a, l]
^  Exit: (283) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, l])
   Call: (283) [system] _409724=[v, a, l]
   Exit: (283) [system] [v, a, l]=[v, a, l]
^  Exit: (282) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [v, a, l])
^  Call: (282) [user] classify_and_convert_charseq(e, [v, a, l], _370616)
^  Unify: (282) [user] classify_and_convert_charseq(e, [v, a, l], _370616)
^  Call: (284) [system] setup_call_cleanup('$notrace'(_475754, _475756), once(user:catch(read_from_chars([e, v, a, l], _370616), _475730, fail)), '$restore_trace'(_475754, _475756))
^  Unify: (284) [system] setup_call_cleanup(system:'$notrace'(_475754, _475756), system:once(user:catch(read_from_chars([e, v, a, l], _370616), _475730, fail)), system:'$restore_trace'(_475754, _475756))
^  Call: (285) [system] sig_atomic(system:'$notrace'(_475754, _475756))
^  Exit: (284) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([e, v, a, l], eval), _475730, fail)), system:'$restore_trace'(3, -1))
   Call: (283) [system] atomic(eval)
   Exit: (283) [system] atomic(eval)
^  Exit: (282) [user] classify_and_convert_charseq(e, [v, a, l], eval)
^  Exit: (281) [user] read_symbolic(')', (0x55aefe44e2f0), e, eval)
^  Exit: (280) [user] cont_sexpr(')', (0x55aefe44e2f0), eval)
^  Call: (280) [user] read_list(')', (0x55aefe44e2f0), _484192)
^  Unify: (280) [user] read_list(')', (0x55aefe44e2f0), _484192)
^  Call: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (281) [user] skip_spaces((0x55aefe44e2f0))
   Call: (282) [system] peek_char((0x55aefe44e2f0), _487906)
   Exit: (282) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (282) [system] ' '=(;)
^  Redo: (281) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (282) [user] is_like_space(' ')
^  Unify: (282) [user] is_like_space(' ')
   Call: (283) [system] char_type(' ', 'white')
   Exit: (283) [system] char_type(' ', 'white')
^  Exit: (282) [user] is_like_space(' ')
   Call: (282) [system] get_char((0x55aefe44e2f0), _496564)
   Exit: (282) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (283) [system] peek_char((0x55aefe44e2f0), _500192)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (283) [system] '('=(;)
^  Redo: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (283) [user] is_like_space('(')
^  Unify: (283) [user] is_like_space('(')
   Call: (284) [system] char_type('(', 'white')
^  Redo: (283) [user] is_like_space('(')
^  Unify: (283) [user] is_like_space('(')
   Call: (284) [system] char_type('(', end_of_line)
^  Redo: (283) [user] is_like_space('(')
^  Unify: (283) [user] is_like_space('(')
   Call: (284) [system] char_type('(', space)
^  Redo: (283) [user] is_like_space('(')
^  Unify: (283) [user] is_like_space('(')
   Call: (284) [system] char_type('(', cntrl)
^  Redo: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (281) [user] skip_spaces((0x55aefe44e2f0))
   Call: (281) [system] peek_char((0x55aefe44e2f0), _517900)
   Exit: (281) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (281) [system] '('=')'
^  Redo: (280) [user] read_list(')', (0x55aefe44e2f0), _484192)
   Call: (281) [system] '('=end_of_file
^  Redo: (280) [user] read_list(')', (0x55aefe44e2f0), _484192)
^  Call: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _6110)
^  Unify: (281) [user] cont_sexpr(')', (0x55aefe44e2f0), _6110)
^  Call: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (283) [system] peek_char((0x55aefe44e2f0), _9418)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (283) [system] '('=(;)
^  Redo: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (283) [user] is_like_space('(')
^  Unify: (283) [user] is_like_space('(')
   Call: (284) [system] char_type('(', 'white')
^  Redo: (283) [user] is_like_space('(')
^  Unify: (283) [user] is_like_space('(')
   Call: (284) [system] char_type('(', end_of_line)
^  Redo: (283) [user] is_like_space('(')
^  Unify: (283) [user] is_like_space('(')
   Call: (284) [system] char_type('(', space)
^  Redo: (283) [user] is_like_space('(')
^  Unify: (283) [user] is_like_space('(')
   Call: (284) [system] char_type('(', cntrl)
^  Redo: (282) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (282) [user] skip_spaces((0x55aefe44e2f0))
   Call: (282) [system] get_char((0x55aefe44e2f0), _26202)
   Exit: (282) [system] get_char((0x55aefe44e2f0), '(')
   Call: (282) [system] '('='('
   Exit: (282) [system] '('='('
^  Call: (282) [user] read_list(')', (0x55aefe44e2f0), _6110)
^  Unify: (282) [user] read_list(')', (0x55aefe44e2f0), _6110)
^  Call: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (283) [user] skip_spaces((0x55aefe44e2f0))
   Call: (284) [system] peek_char((0x55aefe44e2f0), _33628)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), i)
   Call: (284) [system] i=(;)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (284) [user] is_like_space(i)
^  Unify: (284) [user] is_like_space(i)
   Call: (285) [system] char_type(i, 'white')
^  Redo: (284) [user] is_like_space(i)
^  Unify: (284) [user] is_like_space(i)
   Call: (285) [system] char_type(i, end_of_line)
^  Redo: (284) [user] is_like_space(i)
^  Unify: (284) [user] is_like_space(i)
   Call: (285) [system] char_type(i, space)
^  Redo: (284) [user] is_like_space(i)
^  Unify: (284) [user] is_like_space(i)
   Call: (285) [system] char_type(i, cntrl)
^  Redo: (283) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (283) [user] skip_spaces((0x55aefe44e2f0))
   Call: (283) [system] peek_char((0x55aefe44e2f0), _50412)
   Exit: (283) [system] peek_char((0x55aefe44e2f0), i)
   Call: (283) [system] i=')'
^  Redo: (282) [user] read_list(')', (0x55aefe44e2f0), _6110)
   Call: (283) [system] i=end_of_file
^  Redo: (282) [user] read_list(')', (0x55aefe44e2f0), _6110)
^  Call: (283) [user] cont_sexpr(')', (0x55aefe44e2f0), _55990)
^  Unify: (283) [user] cont_sexpr(')', (0x55aefe44e2f0), _55990)
^  Call: (284) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (284) [user] skip_spaces((0x55aefe44e2f0))
   Call: (285) [system] peek_char((0x55aefe44e2f0), _59704)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), i)
   Call: (285) [system] i=(;)
^  Redo: (284) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (285) [user] is_like_space(i)
^  Unify: (285) [user] is_like_space(i)
   Call: (286) [system] char_type(i, 'white')
^  Redo: (285) [user] is_like_space(i)
^  Unify: (285) [user] is_like_space(i)
   Call: (286) [system] char_type(i, end_of_line)
^  Redo: (285) [user] is_like_space(i)
^  Unify: (285) [user] is_like_space(i)
   Call: (286) [system] char_type(i, space)
^  Redo: (285) [user] is_like_space(i)
^  Unify: (285) [user] is_like_space(i)
   Call: (286) [system] char_type(i, cntrl)
^  Redo: (284) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (284) [user] skip_spaces((0x55aefe44e2f0))
   Call: (284) [system] get_char((0x55aefe44e2f0), _76488)
   Exit: (284) [system] get_char((0x55aefe44e2f0), i)
   Call: (284) [system] i='('
^  Redo: (283) [user] cont_sexpr(')', (0x55aefe44e2f0), _55990)
   Call: (284) [system] i='['
^  Redo: (283) [user] cont_sexpr(')', (0x55aefe44e2f0), _55990)
   Call: (284) [system] i='{'
^  Redo: (283) [user] cont_sexpr(')', (0x55aefe44e2f0), _55990)
   Call: (284) [system] i='"'
^  Redo: (283) [user] cont_sexpr(')', (0x55aefe44e2f0), _55990)
   Call: (284) [system] i=!
^  Redo: (283) [user] cont_sexpr(')', (0x55aefe44e2f0), _55990)
   Call: (284) [system] i='\''
^  Redo: (283) [user] cont_sexpr(')', (0x55aefe44e2f0), _55990)
   Call: (284) [system] i='`'
^  Redo: (283) [user] cont_sexpr(')', (0x55aefe44e2f0), _55990)
   Call: (284) [system] i=end_of_file
^  Redo: (283) [user] cont_sexpr(')', (0x55aefe44e2f0), _55990)
^  Call: (284) [user] read_symbolic(')', (0x55aefe44e2f0), i, _55990)
^  Unify: (284) [user] read_symbolic(')', (0x55aefe44e2f0), i, _55990)
^  Call: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _95098)
^  Unify: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _95098)
   Call: (286) [system] peek_char((0x55aefe44e2f0), _96964)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), f)
^  Call: (286) [user] is_delimiter(f)
^  Unify: (286) [user] is_delimiter(f)
   Call: (287) [system] char_type(f, space)
^  Redo: (286) [user] is_delimiter(f)
   Call: (287) [system] arg(_102604, v('(', ')', end_of_file), f)
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _95098)
   Call: (286) [system] ')'==f
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _95098)
   Call: (286) [system] get_char((0x55aefe44e2f0), f)
   Exit: (286) [system] get_char((0x55aefe44e2f0), f)
   Call: (286) [system] f=(\)
^  Redo: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _95098)
^  Call: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _109970)
^  Unify: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _109970)
   Call: (287) [system] peek_char((0x55aefe44e2f0), _111836)
   Exit: (287) [system] peek_char((0x55aefe44e2f0), -)
^  Call: (287) [user] is_delimiter(-)
^  Unify: (287) [user] is_delimiter(-)
   Call: (288) [system] char_type(-, space)
^  Redo: (287) [user] is_delimiter(-)
   Call: (288) [system] arg(_117476, v('(', ')', end_of_file), -)
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _109970)
   Call: (287) [system] ')'==(-)
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _109970)
   Call: (287) [system] get_char((0x55aefe44e2f0), -)
   Exit: (287) [system] get_char((0x55aefe44e2f0), -)
   Call: (287) [system] (-)=(\)
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _109970)
^  Call: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _124842)
^  Unify: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _124842)
   Call: (288) [system] peek_char((0x55aefe44e2f0), _126708)
   Exit: (288) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (288) [user] is_delimiter(e)
^  Unify: (288) [user] is_delimiter(e)
   Call: (289) [system] char_type(e, space)
^  Redo: (288) [user] is_delimiter(e)
   Call: (289) [system] arg(_132348, v('(', ')', end_of_file), e)
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _124842)
   Call: (288) [system] ')'==e
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _124842)
   Call: (288) [system] get_char((0x55aefe44e2f0), e)
   Exit: (288) [system] get_char((0x55aefe44e2f0), e)
   Call: (288) [system] e=(\)
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _124842)
^  Call: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _139714)
^  Unify: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _139714)
   Call: (289) [system] peek_char((0x55aefe44e2f0), _141580)
   Exit: (289) [system] peek_char((0x55aefe44e2f0), q)
^  Call: (289) [user] is_delimiter(q)
^  Unify: (289) [user] is_delimiter(q)
   Call: (290) [system] char_type(q, space)
^  Redo: (289) [user] is_delimiter(q)
   Call: (290) [system] arg(_147220, v('(', ')', end_of_file), q)
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _139714)
   Call: (289) [system] ')'==q
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _139714)
   Call: (289) [system] get_char((0x55aefe44e2f0), q)
   Exit: (289) [system] get_char((0x55aefe44e2f0), q)
   Call: (289) [system] q=(\)
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _139714)
^  Call: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _154586)
^  Unify: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _154586)
   Call: (290) [system] peek_char((0x55aefe44e2f0), _156452)
   Exit: (290) [system] peek_char((0x55aefe44e2f0), u)
^  Call: (290) [user] is_delimiter(u)
^  Unify: (290) [user] is_delimiter(u)
   Call: (291) [system] char_type(u, space)
^  Redo: (290) [user] is_delimiter(u)
   Call: (291) [system] arg(_162092, v('(', ')', end_of_file), u)
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _154586)
   Call: (290) [system] ')'==u
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _154586)
   Call: (290) [system] get_char((0x55aefe44e2f0), u)
   Exit: (290) [system] get_char((0x55aefe44e2f0), u)
   Call: (290) [system] u=(\)
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _154586)
^  Call: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169458)
^  Unify: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169458)
   Call: (291) [system] peek_char((0x55aefe44e2f0), _171324)
   Exit: (291) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (291) [user] is_delimiter(a)
^  Unify: (291) [user] is_delimiter(a)
   Call: (292) [system] char_type(a, space)
^  Redo: (291) [user] is_delimiter(a)
   Call: (292) [system] arg(_176964, v('(', ')', end_of_file), a)
^  Redo: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169458)
   Call: (291) [system] ')'==a
^  Redo: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169458)
   Call: (291) [system] get_char((0x55aefe44e2f0), a)
   Exit: (291) [system] get_char((0x55aefe44e2f0), a)
   Call: (291) [system] a=(\)
^  Redo: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _169458)
^  Call: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _184330)
^  Unify: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _184330)
   Call: (292) [system] peek_char((0x55aefe44e2f0), _186196)
   Exit: (292) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (292) [user] is_delimiter(l)
^  Unify: (292) [user] is_delimiter(l)
   Call: (293) [system] char_type(l, space)
^  Redo: (292) [user] is_delimiter(l)
   Call: (293) [system] arg(_191836, v('(', ')', end_of_file), l)
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _184330)
   Call: (292) [system] ')'==l
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _184330)
   Call: (292) [system] get_char((0x55aefe44e2f0), l)
   Exit: (292) [system] get_char((0x55aefe44e2f0), l)
   Call: (292) [system] l=(\)
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _184330)
^  Call: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _199202)
^  Unify: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _199202)
   Call: (293) [system] peek_char((0x55aefe44e2f0), _201068)
   Exit: (293) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (293) [user] is_delimiter(' ')
^  Unify: (293) [user] is_delimiter(' ')
   Call: (294) [system] char_type(' ', space)
   Exit: (294) [system] char_type(' ', space)
^  Exit: (293) [user] is_delimiter(' ')
   Call: (293) [system] _199202=[]
   Exit: (293) [system] []=[]
^  Exit: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (292) [system] _184330=[l]
   Exit: (292) [system] [l]=[l]
^  Exit: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l])
   Call: (291) [system] _169458=[a, l]
   Exit: (291) [system] [a, l]=[a, l]
^  Exit: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, l])
   Call: (290) [system] _154586=[u, a, l]
   Exit: (290) [system] [u, a, l]=[u, a, l]
^  Exit: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [u, a, l])
   Call: (289) [system] _139714=[q, u, a, l]
   Exit: (289) [system] [q, u, a, l]=[q, u, a, l]
^  Exit: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [q, u, a, l])
   Call: (288) [system] _124842=[e, q, u, a, l]
   Exit: (288) [system] [e, q, u, a, l]=[e, q, u, a, l]
^  Exit: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, q, u, a, l])
   Call: (287) [system] _109970=[-, e, q, u, a, l]
   Exit: (287) [system] [-, e, q, u, a, l]=[-, e, q, u, a, l]
^  Exit: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [-, e, q, u, a, l])
   Call: (286) [system] _95098=[f, -, e, q, u, a, l]
   Exit: (286) [system] [f, -, e, q, u, a, l]=[f, -, e, q, u, a, l]
^  Exit: (285) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [f, -, e, q, u, a, l])
^  Call: (285) [user] classify_and_convert_charseq(i, [f, -, e, q, u, a, l], _55990)
^  Unify: (285) [user] classify_and_convert_charseq(i, [f, -, e, q, u, a, l], _55990)
^  Call: (287) [system] setup_call_cleanup('$notrace'(_231792, _231794), once(user:catch(read_from_chars([i, f, -, e, q, u, a, l], _55990), _231768, fail)), '$restore_trace'(_231792, _231794))
^  Unify: (287) [system] setup_call_cleanup(system:'$notrace'(_231792, _231794), system:once(user:catch(read_from_chars([i, f, -, e, q, u, a, l], _55990), _231768, fail)), system:'$restore_trace'(_231792, _231794))
^  Call: (288) [system] sig_atomic(system:'$notrace'(_231792, _231794))
^  Exit: (287) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([i, f, -, e, q, u, a, l], if-equal), _231768, fail)), system:'$restore_trace'(3, -1))
   Call: (286) [system] atomic(if-equal)
^  Redo: (285) [user] classify_and_convert_charseq(i, [f, -, e, q, u, a, l], _55990)
^  Unify: (285) [user] classify_and_convert_charseq(i, [f, -, e, q, u, a, l], _55990)
   Call: (286) [system] atom_chars(_55990, [i, f, -, e, q, u, a, l])
   Exit: (286) [system] atom_chars('if-equal', [i, f, -, e, q, u, a, l])
^  Exit: (285) [user] classify_and_convert_charseq(i, [f, -, e, q, u, a, l], 'if-equal')
^  Exit: (284) [user] read_symbolic(')', (0x55aefe44e2f0), i, 'if-equal')
^  Exit: (283) [user] cont_sexpr(')', (0x55aefe44e2f0), 'if-equal')
^  Call: (283) [user] read_list(')', (0x55aefe44e2f0), _243038)
^  Unify: (283) [user] read_list(')', (0x55aefe44e2f0), _243038)
^  Call: (284) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (284) [user] skip_spaces((0x55aefe44e2f0))
   Call: (285) [system] peek_char((0x55aefe44e2f0), _246752)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (285) [system] ' '=(;)
^  Redo: (284) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (285) [user] is_like_space(' ')
^  Unify: (285) [user] is_like_space(' ')
   Call: (286) [system] char_type(' ', 'white')
   Exit: (286) [system] char_type(' ', 'white')
^  Exit: (285) [user] is_like_space(' ')
   Call: (285) [system] get_char((0x55aefe44e2f0), _255410)
   Exit: (285) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (285) [user] skip_spaces((0x55aefe44e2f0))
   Call: (286) [system] peek_char((0x55aefe44e2f0), _259038)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), $)
   Call: (286) [system] ($)=(;)
^  Redo: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (286) [user] is_like_space($)
^  Unify: (286) [user] is_like_space($)
   Call: (287) [system] char_type($, 'white')
^  Redo: (286) [user] is_like_space($)
^  Unify: (286) [user] is_like_space($)
   Call: (287) [system] char_type($, end_of_line)
^  Redo: (286) [user] is_like_space($)
^  Unify: (286) [user] is_like_space($)
   Call: (287) [system] char_type($, space)
^  Redo: (286) [user] is_like_space($)
^  Unify: (286) [user] is_like_space($)
   Call: (287) [system] char_type($, cntrl)
^  Redo: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (284) [user] skip_spaces((0x55aefe44e2f0))
   Call: (284) [system] peek_char((0x55aefe44e2f0), _276746)
   Exit: (284) [system] peek_char((0x55aefe44e2f0), $)
   Call: (284) [system] ($)=')'
^  Redo: (283) [user] read_list(')', (0x55aefe44e2f0), _243038)
   Call: (284) [system] ($)=end_of_file
^  Redo: (283) [user] read_list(')', (0x55aefe44e2f0), _243038)
^  Call: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _282324)
^  Unify: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _282324)
^  Call: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (285) [user] skip_spaces((0x55aefe44e2f0))
   Call: (286) [system] peek_char((0x55aefe44e2f0), _286038)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), $)
   Call: (286) [system] ($)=(;)
^  Redo: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (286) [user] is_like_space($)
^  Unify: (286) [user] is_like_space($)
   Call: (287) [system] char_type($, 'white')
^  Redo: (286) [user] is_like_space($)
^  Unify: (286) [user] is_like_space($)
   Call: (287) [system] char_type($, end_of_line)
^  Redo: (286) [user] is_like_space($)
^  Unify: (286) [user] is_like_space($)
   Call: (287) [system] char_type($, space)
^  Redo: (286) [user] is_like_space($)
^  Unify: (286) [user] is_like_space($)
   Call: (287) [system] char_type($, cntrl)
^  Redo: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (285) [user] skip_spaces((0x55aefe44e2f0))
   Call: (285) [system] get_char((0x55aefe44e2f0), _302822)
   Exit: (285) [system] get_char((0x55aefe44e2f0), $)
   Call: (285) [system] ($)='('
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _282324)
   Call: (285) [system] ($)='['
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _282324)
   Call: (285) [system] ($)='{'
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _282324)
   Call: (285) [system] ($)='"'
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _282324)
   Call: (285) [system] ($)=!
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _282324)
   Call: (285) [system] ($)='\''
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _282324)
   Call: (285) [system] ($)='`'
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _282324)
   Call: (285) [system] ($)=end_of_file
^  Redo: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _282324)
^  Call: (285) [user] read_symbolic(')', (0x55aefe44e2f0), $, _282324)
^  Unify: (285) [user] read_symbolic(')', (0x55aefe44e2f0), $, _282324)
^  Call: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _321432)
^  Unify: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _321432)
   Call: (287) [system] peek_char((0x55aefe44e2f0), _323298)
   Exit: (287) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (287) [user] is_delimiter(m)
^  Unify: (287) [user] is_delimiter(m)
   Call: (288) [system] char_type(m, space)
^  Redo: (287) [user] is_delimiter(m)
   Call: (288) [system] arg(_328938, v('(', ')', end_of_file), m)
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _321432)
   Call: (287) [system] ')'==m
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _321432)
   Call: (287) [system] get_char((0x55aefe44e2f0), m)
   Exit: (287) [system] get_char((0x55aefe44e2f0), m)
   Call: (287) [system] m=(\)
^  Redo: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _321432)
^  Call: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _336304)
^  Unify: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _336304)
   Call: (288) [system] peek_char((0x55aefe44e2f0), _338170)
   Exit: (288) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (288) [user] is_delimiter(e)
^  Unify: (288) [user] is_delimiter(e)
   Call: (289) [system] char_type(e, space)
^  Redo: (288) [user] is_delimiter(e)
   Call: (289) [system] arg(_343810, v('(', ')', end_of_file), e)
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _336304)
   Call: (288) [system] ')'==e
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _336304)
   Call: (288) [system] get_char((0x55aefe44e2f0), e)
   Exit: (288) [system] get_char((0x55aefe44e2f0), e)
   Call: (288) [system] e=(\)
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _336304)
^  Call: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _351176)
^  Unify: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _351176)
   Call: (289) [system] peek_char((0x55aefe44e2f0), _353042)
   Exit: (289) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (289) [user] is_delimiter(t)
^  Unify: (289) [user] is_delimiter(t)
   Call: (290) [system] char_type(t, space)
^  Redo: (289) [user] is_delimiter(t)
   Call: (290) [system] arg(_358682, v('(', ')', end_of_file), t)
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _351176)
   Call: (289) [system] ')'==t
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _351176)
   Call: (289) [system] get_char((0x55aefe44e2f0), t)
   Exit: (289) [system] get_char((0x55aefe44e2f0), t)
   Call: (289) [system] t=(\)
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _351176)
^  Call: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _366048)
^  Unify: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _366048)
   Call: (290) [system] peek_char((0x55aefe44e2f0), _367914)
   Exit: (290) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (290) [user] is_delimiter(a)
^  Unify: (290) [user] is_delimiter(a)
   Call: (291) [system] char_type(a, space)
^  Redo: (290) [user] is_delimiter(a)
   Call: (291) [system] arg(_373554, v('(', ')', end_of_file), a)
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _366048)
   Call: (290) [system] ')'==a
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _366048)
   Call: (290) [system] get_char((0x55aefe44e2f0), a)
   Exit: (290) [system] get_char((0x55aefe44e2f0), a)
   Call: (290) [system] a=(\)
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _366048)
^  Call: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _380920)
^  Unify: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _380920)
   Call: (291) [system] peek_char((0x55aefe44e2f0), _382786)
   Exit: (291) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (291) [user] is_delimiter(' ')
^  Unify: (291) [user] is_delimiter(' ')
   Call: (292) [system] char_type(' ', space)
   Exit: (292) [system] char_type(' ', space)
^  Exit: (291) [user] is_delimiter(' ')
   Call: (291) [system] _380920=[]
   Exit: (291) [system] []=[]
^  Exit: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (290) [system] _366048=[a]
   Exit: (290) [system] [a]=[a]
^  Exit: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a])
   Call: (289) [system] _351176=[t, a]
   Exit: (289) [system] [t, a]=[t, a]
^  Exit: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, a])
   Call: (288) [system] _336304=[e, t, a]
   Exit: (288) [system] [e, t, a]=[e, t, a]
^  Exit: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, t, a])
   Call: (287) [system] _321432=[m, e, t, a]
   Exit: (287) [system] [m, e, t, a]=[m, e, t, a]
^  Exit: (286) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m, e, t, a])
^  Call: (286) [user] classify_and_convert_charseq($, [m, e, t, a], _282324)
^  Unify: (286) [user] classify_and_convert_charseq($, [m, e, t, a], '$VAR'(_404170))
   Call: (287) [system] atom_chars(_404170, ['_', m, e, t, a])
   Exit: (287) [system] atom_chars('_meta', ['_', m, e, t, a])
^  Exit: (286) [user] classify_and_convert_charseq($, [m, e, t, a], _meta)
^  Exit: (285) [user] read_symbolic(')', (0x55aefe44e2f0), $, _meta)
^  Exit: (284) [user] cont_sexpr(')', (0x55aefe44e2f0), _meta)
^  Call: (284) [user] read_list(')', (0x55aefe44e2f0), _409766)
^  Unify: (284) [user] read_list(')', (0x55aefe44e2f0), _409766)
^  Call: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (285) [user] skip_spaces((0x55aefe44e2f0))
   Call: (286) [system] peek_char((0x55aefe44e2f0), _413480)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (286) [system] ' '=(;)
^  Redo: (285) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (286) [user] is_like_space(' ')
^  Unify: (286) [user] is_like_space(' ')
   Call: (287) [system] char_type(' ', 'white')
   Exit: (287) [system] char_type(' ', 'white')
^  Exit: (286) [user] is_like_space(' ')
   Call: (286) [system] get_char((0x55aefe44e2f0), _422138)
   Exit: (286) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (286) [user] skip_spaces((0x55aefe44e2f0))
   Call: (287) [system] peek_char((0x55aefe44e2f0), _425766)
   Exit: (287) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (287) [system] 'E'=(;)
^  Redo: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (287) [user] is_like_space('E')
^  Unify: (287) [user] is_like_space('E')
   Call: (288) [system] char_type('E', 'white')
^  Redo: (287) [user] is_like_space('E')
^  Unify: (287) [user] is_like_space('E')
   Call: (288) [system] char_type('E', end_of_line)
^  Redo: (287) [user] is_like_space('E')
^  Unify: (287) [user] is_like_space('E')
   Call: (288) [system] char_type('E', space)
^  Redo: (287) [user] is_like_space('E')
^  Unify: (287) [user] is_like_space('E')
   Call: (288) [system] char_type('E', cntrl)
^  Redo: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (285) [user] skip_spaces((0x55aefe44e2f0))
   Call: (285) [system] peek_char((0x55aefe44e2f0), _443474)
   Exit: (285) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (285) [system] 'E'=')'
^  Redo: (284) [user] read_list(')', (0x55aefe44e2f0), _409766)
   Call: (285) [system] 'E'=end_of_file
^  Redo: (284) [user] read_list(')', (0x55aefe44e2f0), _409766)
^  Call: (285) [user] cont_sexpr(')', (0x55aefe44e2f0), _449052)
^  Unify: (285) [user] cont_sexpr(')', (0x55aefe44e2f0), _449052)
^  Call: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (286) [user] skip_spaces((0x55aefe44e2f0))
   Call: (287) [system] peek_char((0x55aefe44e2f0), _452766)
   Exit: (287) [system] peek_char((0x55aefe44e2f0), 'E')
   Call: (287) [system] 'E'=(;)
^  Redo: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (287) [user] is_like_space('E')
^  Unify: (287) [user] is_like_space('E')
   Call: (288) [system] char_type('E', 'white')
^  Redo: (287) [user] is_like_space('E')
^  Unify: (287) [user] is_like_space('E')
   Call: (288) [system] char_type('E', end_of_line)
^  Redo: (287) [user] is_like_space('E')
^  Unify: (287) [user] is_like_space('E')
   Call: (288) [system] char_type('E', space)
^  Redo: (287) [user] is_like_space('E')
^  Unify: (287) [user] is_like_space('E')
   Call: (288) [system] char_type('E', cntrl)
^  Redo: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (286) [user] skip_spaces((0x55aefe44e2f0))
   Call: (286) [system] get_char((0x55aefe44e2f0), _469550)
   Exit: (286) [system] get_char((0x55aefe44e2f0), 'E')
   Call: (286) [system] 'E'='('
^  Redo: (285) [user] cont_sexpr(')', (0x55aefe44e2f0), _449052)
   Call: (286) [system] 'E'='['
^  Redo: (285) [user] cont_sexpr(')', (0x55aefe44e2f0), _449052)
   Call: (286) [system] 'E'='{'
^  Redo: (285) [user] cont_sexpr(')', (0x55aefe44e2f0), _449052)
   Call: (286) [system] 'E'='"'
^  Redo: (285) [user] cont_sexpr(')', (0x55aefe44e2f0), _449052)
   Call: (286) [system] 'E'=!
^  Redo: (285) [user] cont_sexpr(')', (0x55aefe44e2f0), _449052)
   Call: (286) [system] 'E'='\''
^  Redo: (285) [user] cont_sexpr(')', (0x55aefe44e2f0), _449052)
   Call: (286) [system] 'E'='`'
^  Redo: (285) [user] cont_sexpr(')', (0x55aefe44e2f0), _449052)
   Call: (286) [system] 'E'=end_of_file
^  Redo: (285) [user] cont_sexpr(')', (0x55aefe44e2f0), _449052)
^  Call: (286) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', _449052)
^  Unify: (286) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', _449052)
^  Call: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _488160)
^  Unify: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _488160)
   Call: (288) [system] peek_char((0x55aefe44e2f0), _490026)
   Exit: (288) [system] peek_char((0x55aefe44e2f0), x)
^  Call: (288) [user] is_delimiter(x)
^  Unify: (288) [user] is_delimiter(x)
   Call: (289) [system] char_type(x, space)
^  Redo: (288) [user] is_delimiter(x)
   Call: (289) [system] arg(_495666, v('(', ')', end_of_file), x)
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _488160)
   Call: (288) [system] ')'==x
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _488160)
   Call: (288) [system] get_char((0x55aefe44e2f0), x)
   Exit: (288) [system] get_char((0x55aefe44e2f0), x)
   Call: (288) [system] x=(\)
^  Redo: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _488160)
^  Call: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _503032)
^  Unify: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _503032)
   Call: (289) [system] peek_char((0x55aefe44e2f0), _504898)
   Exit: (289) [system] peek_char((0x55aefe44e2f0), p)
^  Call: (289) [user] is_delimiter(p)
^  Unify: (289) [user] is_delimiter(p)
   Call: (290) [system] char_type(p, space)
^  Redo: (289) [user] is_delimiter(p)
   Call: (290) [system] arg(_510538, v('(', ')', end_of_file), p)
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _503032)
   Call: (289) [system] ')'==p
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _503032)
   Call: (289) [system] get_char((0x55aefe44e2f0), p)
   Exit: (289) [system] get_char((0x55aefe44e2f0), p)
   Call: (289) [system] p=(\)
^  Redo: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _503032)
^  Call: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _517904)
^  Unify: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _517904)
   Call: (290) [system] peek_char((0x55aefe44e2f0), _519770)
   Exit: (290) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (290) [user] is_delimiter(r)
^  Unify: (290) [user] is_delimiter(r)
   Call: (291) [system] char_type(r, space)
^  Redo: (290) [user] is_delimiter(r)
   Call: (291) [system] arg(_7676, v('(', ')', end_of_file), r)
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6142)
   Call: (290) [system] ')'==r
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6142)
   Call: (290) [system] get_char((0x55aefe44e2f0), r)
   Exit: (290) [system] get_char((0x55aefe44e2f0), r)
   Call: (290) [system] r=(\)
^  Redo: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6142)
^  Call: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _15042)
^  Unify: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _15042)
   Call: (291) [system] peek_char((0x55aefe44e2f0), _16908)
   Exit: (291) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (291) [user] is_delimiter(e)
^  Unify: (291) [user] is_delimiter(e)
   Call: (292) [system] char_type(e, space)
^  Redo: (291) [user] is_delimiter(e)
   Call: (292) [system] arg(_22548, v('(', ')', end_of_file), e)
^  Redo: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _15042)
   Call: (291) [system] ')'==e
^  Redo: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _15042)
   Call: (291) [system] get_char((0x55aefe44e2f0), e)
   Exit: (291) [system] get_char((0x55aefe44e2f0), e)
   Call: (291) [system] e=(\)
^  Redo: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _15042)
^  Call: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _29914)
^  Unify: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _29914)
   Call: (292) [system] peek_char((0x55aefe44e2f0), _31780)
   Exit: (292) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (292) [user] is_delimiter(s)
^  Unify: (292) [user] is_delimiter(s)
   Call: (293) [system] char_type(s, space)
^  Redo: (292) [user] is_delimiter(s)
   Call: (293) [system] arg(_37420, v('(', ')', end_of_file), s)
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _29914)
   Call: (292) [system] ')'==s
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _29914)
   Call: (292) [system] get_char((0x55aefe44e2f0), s)
   Exit: (292) [system] get_char((0x55aefe44e2f0), s)
   Call: (292) [system] s=(\)
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _29914)
^  Call: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _44786)
^  Unify: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _44786)
   Call: (293) [system] peek_char((0x55aefe44e2f0), _46652)
   Exit: (293) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (293) [user] is_delimiter(s)
^  Unify: (293) [user] is_delimiter(s)
   Call: (294) [system] char_type(s, space)
^  Redo: (293) [user] is_delimiter(s)
   Call: (294) [system] arg(_52292, v('(', ')', end_of_file), s)
^  Redo: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _44786)
   Call: (293) [system] ')'==s
^  Redo: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _44786)
   Call: (293) [system] get_char((0x55aefe44e2f0), s)
   Exit: (293) [system] get_char((0x55aefe44e2f0), s)
   Call: (293) [system] s=(\)
^  Redo: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _44786)
^  Call: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _59658)
^  Unify: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _59658)
   Call: (294) [system] peek_char((0x55aefe44e2f0), _61524)
   Exit: (294) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (294) [user] is_delimiter(i)
^  Unify: (294) [user] is_delimiter(i)
   Call: (295) [system] char_type(i, space)
^  Redo: (294) [user] is_delimiter(i)
   Call: (295) [system] arg(_67164, v('(', ')', end_of_file), i)
^  Redo: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _59658)
   Call: (294) [system] ')'==i
^  Redo: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _59658)
   Call: (294) [system] get_char((0x55aefe44e2f0), i)
   Exit: (294) [system] get_char((0x55aefe44e2f0), i)
   Call: (294) [system] i=(\)
^  Redo: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _59658)
^  Call: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _74530)
^  Unify: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _74530)
   Call: (295) [system] peek_char((0x55aefe44e2f0), _76396)
   Exit: (295) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (295) [user] is_delimiter(o)
^  Unify: (295) [user] is_delimiter(o)
   Call: (296) [system] char_type(o, space)
^  Redo: (295) [user] is_delimiter(o)
   Call: (296) [system] arg(_82036, v('(', ')', end_of_file), o)
^  Redo: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _74530)
   Call: (295) [system] ')'==o
^  Redo: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _74530)
   Call: (295) [system] get_char((0x55aefe44e2f0), o)
   Exit: (295) [system] get_char((0x55aefe44e2f0), o)
   Call: (295) [system] o=(\)
^  Redo: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _74530)
^  Call: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _89402)
^  Unify: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _89402)
   Call: (296) [system] peek_char((0x55aefe44e2f0), _91268)
   Exit: (296) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (296) [user] is_delimiter(n)
^  Unify: (296) [user] is_delimiter(n)
   Call: (297) [system] char_type(n, space)
^  Redo: (296) [user] is_delimiter(n)
   Call: (297) [system] arg(_96908, v('(', ')', end_of_file), n)
^  Redo: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _89402)
   Call: (296) [system] ')'==n
^  Redo: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _89402)
   Call: (296) [system] get_char((0x55aefe44e2f0), n)
   Exit: (296) [system] get_char((0x55aefe44e2f0), n)
   Call: (296) [system] n=(\)
^  Redo: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _89402)
^  Call: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _104274)
^  Unify: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _104274)
   Call: (297) [system] peek_char((0x55aefe44e2f0), _106140)
   Exit: (297) [system] peek_char((0x55aefe44e2f0), '\n')
^  Call: (297) [user] is_delimiter('\n')
^  Unify: (297) [user] is_delimiter('\n')
   Call: (298) [system] char_type('\n', space)
   Exit: (298) [system] char_type('\n', space)
^  Exit: (297) [user] is_delimiter('\n')
   Call: (297) [system] _104274=[]
   Exit: (297) [system] []=[]
^  Exit: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (296) [system] _89402=[n]
   Exit: (296) [system] [n]=[n]
^  Exit: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (295) [system] _74530=[o, n]
   Exit: (295) [system] [o, n]=[o, n]
^  Exit: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, n])
   Call: (294) [system] _59658=[i, o, n]
   Exit: (294) [system] [i, o, n]=[i, o, n]
^  Exit: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, o, n])
   Call: (293) [system] _44786=[s, i, o, n]
   Exit: (293) [system] [s, i, o, n]=[s, i, o, n]
^  Exit: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, i, o, n])
   Call: (292) [system] _29914=[s, s, i, o, n]
   Exit: (292) [system] [s, s, i, o, n]=[s, s, i, o, n]
^  Exit: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, s, i, o, n])
   Call: (291) [system] _15042=[e, s, s, i, o, n]
   Exit: (291) [system] [e, s, s, i, o, n]=[e, s, s, i, o, n]
^  Exit: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, s, s, i, o, n])
   Call: (290) [system] _6142=[r, e, s, s, i, o, n]
   Exit: (290) [system] [r, e, s, s, i, o, n]=[r, e, s, s, i, o, n]
^  Exit: (289) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, e, s, s, i, o, n])
   Call: (289) [system] _6138=[p, r, e, s, s, i, o, n]
   Exit: (289) [system] [p, r, e, s, s, i, o, n]=[p, r, e, s, s, i, o, n]
^  Exit: (288) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [p, r, e, s, s, i, o, n])
   Call: (288) [system] _6134=[x, p, r, e, s, s, i, o, n]
   Exit: (288) [system] [x, p, r, e, s, s, i, o, n]=[x, p, r, e, s, s, i, o, n]
^  Exit: (287) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [x, p, r, e, s, s, i, o, n])
^  Call: (287) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _6130)
^  Unify: (287) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _6130)
^  Call: (289) [system] setup_call_cleanup('$notrace'(_142452, _142454), once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _6130), _142428, fail)), '$restore_trace'(_142452, _142454))
^  Unify: (289) [system] setup_call_cleanup(system:'$notrace'(_142452, _142454), system:once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _6130), _142428, fail)), system:'$restore_trace'(_142452, _142454))
^  Call: (290) [system] sig_atomic(system:'$notrace'(_142452, _142454))
^  Exit: (289) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars(['E', x, p, r, e, s, s, i, o, n], _6130), _142428, fail)), system:'$restore_trace'(3, -1))
   Call: (288) [system] atomic(_6130)
^  Redo: (287) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _6130)
^  Unify: (287) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], _6130)
   Call: (288) [system] atom_chars(_6130, ['E', x, p, r, e, s, s, i, o, n])
   Exit: (288) [system] atom_chars('Expression', ['E', x, p, r, e, s, s, i, o, n])
^  Exit: (287) [user] classify_and_convert_charseq('E', [x, p, r, e, s, s, i, o, n], 'Expression')
^  Exit: (286) [user] read_symbolic(')', (0x55aefe44e2f0), 'E', 'Expression')
^  Exit: (285) [user] cont_sexpr(')', (0x55aefe44e2f0), 'Expression')
^  Call: (285) [user] read_list(')', (0x55aefe44e2f0), _153706)
^  Unify: (285) [user] read_list(')', (0x55aefe44e2f0), _153706)
^  Call: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (286) [user] skip_spaces((0x55aefe44e2f0))
   Call: (287) [system] peek_char((0x55aefe44e2f0), _157420)
   Exit: (287) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (287) [system] '\n'=(;)
^  Redo: (286) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (287) [user] is_like_space('\n')
^  Unify: (287) [user] is_like_space('\n')
   Call: (288) [system] char_type('\n', 'white')
^  Redo: (287) [user] is_like_space('\n')
^  Unify: (287) [user] is_like_space('\n')
   Call: (288) [system] char_type('\n', end_of_line)
   Exit: (288) [system] char_type('\n', end_of_line)
^  Exit: (287) [user] is_like_space('\n')
   Call: (287) [system] get_char((0x55aefe44e2f0), _168732)
   Exit: (287) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (287) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (287) [user] skip_spaces((0x55aefe44e2f0))
   Call: (288) [system] peek_char((0x55aefe44e2f0), _172360)
   Exit: (288) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (288) [system] ' '=(;)
^  Redo: (287) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (288) [user] is_like_space(' ')
^  Unify: (288) [user] is_like_space(' ')
   Call: (289) [system] char_type(' ', 'white')
   Exit: (289) [system] char_type(' ', 'white')
^  Exit: (288) [user] is_like_space(' ')
   Call: (288) [system] get_char((0x55aefe44e2f0), _181018)
   Exit: (288) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (288) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (288) [user] skip_spaces((0x55aefe44e2f0))
   Call: (289) [system] peek_char((0x55aefe44e2f0), _184646)
   Exit: (289) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (289) [system] ' '=(;)
^  Redo: (288) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (289) [user] is_like_space(' ')
^  Unify: (289) [user] is_like_space(' ')
   Call: (290) [system] char_type(' ', 'white')
   Exit: (290) [system] char_type(' ', 'white')
^  Exit: (289) [user] is_like_space(' ')
   Call: (289) [system] get_char((0x55aefe44e2f0), _193304)
   Exit: (289) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (289) [user] skip_spaces((0x55aefe44e2f0))
   Call: (290) [system] peek_char((0x55aefe44e2f0), _196932)
   Exit: (290) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (290) [system] ' '=(;)
^  Redo: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (290) [user] is_like_space(' ')
^  Unify: (290) [user] is_like_space(' ')
   Call: (291) [system] char_type(' ', 'white')
   Exit: (291) [system] char_type(' ', 'white')
^  Exit: (290) [user] is_like_space(' ')
   Call: (290) [system] get_char((0x55aefe44e2f0), _205590)
   Exit: (290) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (290) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (290) [user] skip_spaces((0x55aefe44e2f0))
   Call: (291) [system] peek_char((0x55aefe44e2f0), _209218)
   Exit: (291) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (291) [system] ' '=(;)
^  Redo: (290) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (291) [user] is_like_space(' ')
^  Unify: (291) [user] is_like_space(' ')
   Call: (292) [system] char_type(' ', 'white')
   Exit: (292) [system] char_type(' ', 'white')
^  Exit: (291) [user] is_like_space(' ')
   Call: (291) [system] get_char((0x55aefe44e2f0), _217876)
   Exit: (291) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (291) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (291) [user] skip_spaces((0x55aefe44e2f0))
   Call: (292) [system] peek_char((0x55aefe44e2f0), _221504)
   Exit: (292) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (292) [system] ' '=(;)
^  Redo: (291) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (292) [user] is_like_space(' ')
^  Unify: (292) [user] is_like_space(' ')
   Call: (293) [system] char_type(' ', 'white')
   Exit: (293) [system] char_type(' ', 'white')
^  Exit: (292) [user] is_like_space(' ')
   Call: (292) [system] get_char((0x55aefe44e2f0), _230162)
   Exit: (292) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (292) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (292) [user] skip_spaces((0x55aefe44e2f0))
   Call: (293) [system] peek_char((0x55aefe44e2f0), _233790)
   Exit: (293) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (293) [system] ' '=(;)
^  Redo: (292) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (293) [user] is_like_space(' ')
^  Unify: (293) [user] is_like_space(' ')
   Call: (294) [system] char_type(' ', 'white')
   Exit: (294) [system] char_type(' ', 'white')
^  Exit: (293) [user] is_like_space(' ')
   Call: (293) [system] get_char((0x55aefe44e2f0), _242448)
   Exit: (293) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (293) [user] skip_spaces((0x55aefe44e2f0))
   Call: (294) [system] peek_char((0x55aefe44e2f0), _246076)
   Exit: (294) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (294) [system] '('=(;)
^  Redo: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (294) [user] is_like_space('(')
^  Unify: (294) [user] is_like_space('(')
   Call: (295) [system] char_type('(', 'white')
^  Redo: (294) [user] is_like_space('(')
^  Unify: (294) [user] is_like_space('(')
   Call: (295) [system] char_type('(', end_of_line)
^  Redo: (294) [user] is_like_space('(')
^  Unify: (294) [user] is_like_space('(')
   Call: (295) [system] char_type('(', space)
^  Redo: (294) [user] is_like_space('(')
^  Unify: (294) [user] is_like_space('(')
   Call: (295) [system] char_type('(', cntrl)
^  Redo: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (292) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (291) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (290) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (288) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (287) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (286) [user] skip_spaces((0x55aefe44e2f0))
   Call: (286) [system] peek_char((0x55aefe44e2f0), _269328)
   Exit: (286) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (286) [system] '('=')'
^  Redo: (285) [user] read_list(')', (0x55aefe44e2f0), _153706)
   Call: (286) [system] '('=end_of_file
^  Redo: (285) [user] read_list(')', (0x55aefe44e2f0), _153706)
^  Call: (286) [user] cont_sexpr(')', (0x55aefe44e2f0), _274906)
^  Unify: (286) [user] cont_sexpr(')', (0x55aefe44e2f0), _274906)
^  Call: (287) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (287) [user] skip_spaces((0x55aefe44e2f0))
   Call: (288) [system] peek_char((0x55aefe44e2f0), _278620)
   Exit: (288) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (288) [system] '('=(;)
^  Redo: (287) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (288) [user] is_like_space('(')
^  Unify: (288) [user] is_like_space('(')
   Call: (289) [system] char_type('(', 'white')
^  Redo: (288) [user] is_like_space('(')
^  Unify: (288) [user] is_like_space('(')
   Call: (289) [system] char_type('(', end_of_line)
^  Redo: (288) [user] is_like_space('(')
^  Unify: (288) [user] is_like_space('(')
   Call: (289) [system] char_type('(', space)
^  Redo: (288) [user] is_like_space('(')
^  Unify: (288) [user] is_like_space('(')
   Call: (289) [system] char_type('(', cntrl)
^  Redo: (287) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (287) [user] skip_spaces((0x55aefe44e2f0))
   Call: (287) [system] get_char((0x55aefe44e2f0), _295404)
   Exit: (287) [system] get_char((0x55aefe44e2f0), '(')
   Call: (287) [system] '('='('
   Exit: (287) [system] '('='('
^  Call: (287) [user] read_list(')', (0x55aefe44e2f0), _274906)
^  Unify: (287) [user] read_list(')', (0x55aefe44e2f0), _274906)
^  Call: (288) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (288) [user] skip_spaces((0x55aefe44e2f0))
   Call: (289) [system] peek_char((0x55aefe44e2f0), _302830)
   Exit: (289) [system] peek_char((0x55aefe44e2f0), e)
   Call: (289) [system] e=(;)
^  Redo: (288) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (289) [user] is_like_space(e)
^  Unify: (289) [user] is_like_space(e)
   Call: (290) [system] char_type(e, 'white')
^  Redo: (289) [user] is_like_space(e)
^  Unify: (289) [user] is_like_space(e)
   Call: (290) [system] char_type(e, end_of_line)
^  Redo: (289) [user] is_like_space(e)
^  Unify: (289) [user] is_like_space(e)
   Call: (290) [system] char_type(e, space)
^  Redo: (289) [user] is_like_space(e)
^  Unify: (289) [user] is_like_space(e)
   Call: (290) [system] char_type(e, cntrl)
^  Redo: (288) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (288) [user] skip_spaces((0x55aefe44e2f0))
   Call: (288) [system] peek_char((0x55aefe44e2f0), _319614)
   Exit: (288) [system] peek_char((0x55aefe44e2f0), e)
   Call: (288) [system] e=')'
^  Redo: (287) [user] read_list(')', (0x55aefe44e2f0), _274906)
   Call: (288) [system] e=end_of_file
^  Redo: (287) [user] read_list(')', (0x55aefe44e2f0), _274906)
^  Call: (288) [user] cont_sexpr(')', (0x55aefe44e2f0), _325192)
^  Unify: (288) [user] cont_sexpr(')', (0x55aefe44e2f0), _325192)
^  Call: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (289) [user] skip_spaces((0x55aefe44e2f0))
   Call: (290) [system] peek_char((0x55aefe44e2f0), _328906)
   Exit: (290) [system] peek_char((0x55aefe44e2f0), e)
   Call: (290) [system] e=(;)
^  Redo: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (290) [user] is_like_space(e)
^  Unify: (290) [user] is_like_space(e)
   Call: (291) [system] char_type(e, 'white')
^  Redo: (290) [user] is_like_space(e)
^  Unify: (290) [user] is_like_space(e)
   Call: (291) [system] char_type(e, end_of_line)
^  Redo: (290) [user] is_like_space(e)
^  Unify: (290) [user] is_like_space(e)
   Call: (291) [system] char_type(e, space)
^  Redo: (290) [user] is_like_space(e)
^  Unify: (290) [user] is_like_space(e)
   Call: (291) [system] char_type(e, cntrl)
^  Redo: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (289) [user] skip_spaces((0x55aefe44e2f0))
   Call: (289) [system] get_char((0x55aefe44e2f0), _345690)
   Exit: (289) [system] get_char((0x55aefe44e2f0), e)
   Call: (289) [system] e='('
^  Redo: (288) [user] cont_sexpr(')', (0x55aefe44e2f0), _325192)
   Call: (289) [system] e='['
^  Redo: (288) [user] cont_sexpr(')', (0x55aefe44e2f0), _325192)
   Call: (289) [system] e='{'
^  Redo: (288) [user] cont_sexpr(')', (0x55aefe44e2f0), _325192)
   Call: (289) [system] e='"'
^  Redo: (288) [user] cont_sexpr(')', (0x55aefe44e2f0), _325192)
   Call: (289) [system] e=!
^  Redo: (288) [user] cont_sexpr(')', (0x55aefe44e2f0), _325192)
   Call: (289) [system] e='\''
^  Redo: (288) [user] cont_sexpr(')', (0x55aefe44e2f0), _325192)
   Call: (289) [system] e='`'
^  Redo: (288) [user] cont_sexpr(')', (0x55aefe44e2f0), _325192)
   Call: (289) [system] e=end_of_file
^  Redo: (288) [user] cont_sexpr(')', (0x55aefe44e2f0), _325192)
^  Call: (289) [user] read_symbolic(')', (0x55aefe44e2f0), e, _325192)
^  Unify: (289) [user] read_symbolic(')', (0x55aefe44e2f0), e, _325192)
^  Call: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _364300)
^  Unify: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _364300)
   Call: (291) [system] peek_char((0x55aefe44e2f0), _366166)
   Exit: (291) [system] peek_char((0x55aefe44e2f0), v)
^  Call: (291) [user] is_delimiter(v)
^  Unify: (291) [user] is_delimiter(v)
   Call: (292) [system] char_type(v, space)
^  Redo: (291) [user] is_delimiter(v)
   Call: (292) [system] arg(_371806, v('(', ')', end_of_file), v)
^  Redo: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _364300)
   Call: (291) [system] ')'==v
^  Redo: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _364300)
   Call: (291) [system] get_char((0x55aefe44e2f0), v)
   Exit: (291) [system] get_char((0x55aefe44e2f0), v)
   Call: (291) [system] v=(\)
^  Redo: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _364300)
^  Call: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _379172)
^  Unify: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _379172)
   Call: (292) [system] peek_char((0x55aefe44e2f0), _381038)
   Exit: (292) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (292) [user] is_delimiter(a)
^  Unify: (292) [user] is_delimiter(a)
   Call: (293) [system] char_type(a, space)
^  Redo: (292) [user] is_delimiter(a)
   Call: (293) [system] arg(_386678, v('(', ')', end_of_file), a)
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _379172)
   Call: (292) [system] ')'==a
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _379172)
   Call: (292) [system] get_char((0x55aefe44e2f0), a)
   Exit: (292) [system] get_char((0x55aefe44e2f0), a)
   Call: (292) [system] a=(\)
^  Redo: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _379172)
^  Call: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _394044)
^  Unify: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _394044)
   Call: (293) [system] peek_char((0x55aefe44e2f0), _395910)
   Exit: (293) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (293) [user] is_delimiter(l)
^  Unify: (293) [user] is_delimiter(l)
   Call: (294) [system] char_type(l, space)
^  Redo: (293) [user] is_delimiter(l)
   Call: (294) [system] arg(_401550, v('(', ')', end_of_file), l)
^  Redo: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _394044)
   Call: (293) [system] ')'==l
^  Redo: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _394044)
   Call: (293) [system] get_char((0x55aefe44e2f0), l)
   Exit: (293) [system] get_char((0x55aefe44e2f0), l)
   Call: (293) [system] l=(\)
^  Redo: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _394044)
^  Call: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _408916)
^  Unify: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _408916)
   Call: (294) [system] peek_char((0x55aefe44e2f0), _410782)
   Exit: (294) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (294) [user] is_delimiter(' ')
^  Unify: (294) [user] is_delimiter(' ')
   Call: (295) [system] char_type(' ', space)
   Exit: (295) [system] char_type(' ', space)
^  Exit: (294) [user] is_delimiter(' ')
   Call: (294) [system] _408916=[]
   Exit: (294) [system] []=[]
^  Exit: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (293) [system] _394044=[l]
   Exit: (293) [system] [l]=[l]
^  Exit: (292) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l])
   Call: (292) [system] _379172=[a, l]
   Exit: (292) [system] [a, l]=[a, l]
^  Exit: (291) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, l])
   Call: (291) [system] _364300=[v, a, l]
   Exit: (291) [system] [v, a, l]=[v, a, l]
^  Exit: (290) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [v, a, l])
^  Call: (290) [user] classify_and_convert_charseq(e, [v, a, l], _325192)
^  Unify: (290) [user] classify_and_convert_charseq(e, [v, a, l], _325192)
^  Call: (292) [system] setup_call_cleanup('$notrace'(_430330, _430332), once(user:catch(read_from_chars([e, v, a, l], _325192), _430306, fail)), '$restore_trace'(_430330, _430332))
^  Unify: (292) [system] setup_call_cleanup(system:'$notrace'(_430330, _430332), system:once(user:catch(read_from_chars([e, v, a, l], _325192), _430306, fail)), system:'$restore_trace'(_430330, _430332))
^  Call: (293) [system] sig_atomic(system:'$notrace'(_430330, _430332))
^  Exit: (292) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([e, v, a, l], eval), _430306, fail)), system:'$restore_trace'(3, -1))
   Call: (291) [system] atomic(eval)
   Exit: (291) [system] atomic(eval)
^  Exit: (290) [user] classify_and_convert_charseq(e, [v, a, l], eval)
^  Exit: (289) [user] read_symbolic(')', (0x55aefe44e2f0), e, eval)
^  Exit: (288) [user] cont_sexpr(')', (0x55aefe44e2f0), eval)
^  Call: (288) [user] read_list(')', (0x55aefe44e2f0), _438768)
^  Unify: (288) [user] read_list(')', (0x55aefe44e2f0), _438768)
^  Call: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (289) [user] skip_spaces((0x55aefe44e2f0))
   Call: (290) [system] peek_char((0x55aefe44e2f0), _442482)
   Exit: (290) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (290) [system] ' '=(;)
^  Redo: (289) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (290) [user] is_like_space(' ')
^  Unify: (290) [user] is_like_space(' ')
   Call: (291) [system] char_type(' ', 'white')
   Exit: (291) [system] char_type(' ', 'white')
^  Exit: (290) [user] is_like_space(' ')
   Call: (290) [system] get_char((0x55aefe44e2f0), _451140)
   Exit: (290) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (290) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (290) [user] skip_spaces((0x55aefe44e2f0))
   Call: (291) [system] peek_char((0x55aefe44e2f0), _454768)
   Exit: (291) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (291) [system] '('=(;)
^  Redo: (290) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (291) [user] is_like_space('(')
^  Unify: (291) [user] is_like_space('(')
   Call: (292) [system] char_type('(', 'white')
^  Redo: (291) [user] is_like_space('(')
^  Unify: (291) [user] is_like_space('(')
   Call: (292) [system] char_type('(', end_of_line)
^  Redo: (291) [user] is_like_space('(')
^  Unify: (291) [user] is_like_space('(')
   Call: (292) [system] char_type('(', space)
^  Redo: (291) [user] is_like_space('(')
^  Unify: (291) [user] is_like_space('(')
   Call: (292) [system] char_type('(', cntrl)
^  Redo: (290) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (290) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (289) [user] skip_spaces((0x55aefe44e2f0))
   Call: (289) [system] peek_char((0x55aefe44e2f0), _472476)
   Exit: (289) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (289) [system] '('=')'
^  Redo: (288) [user] read_list(')', (0x55aefe44e2f0), _438768)
   Call: (289) [system] '('=end_of_file
^  Redo: (288) [user] read_list(')', (0x55aefe44e2f0), _438768)
^  Call: (289) [user] cont_sexpr(')', (0x55aefe44e2f0), _478054)
^  Unify: (289) [user] cont_sexpr(')', (0x55aefe44e2f0), _478054)
^  Call: (290) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (290) [user] skip_spaces((0x55aefe44e2f0))
   Call: (291) [system] peek_char((0x55aefe44e2f0), _481768)
   Exit: (291) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (291) [system] '('=(;)
^  Redo: (290) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (291) [user] is_like_space('(')
^  Unify: (291) [user] is_like_space('(')
   Call: (292) [system] char_type('(', 'white')
^  Redo: (291) [user] is_like_space('(')
^  Unify: (291) [user] is_like_space('(')
   Call: (292) [system] char_type('(', end_of_line)
^  Redo: (291) [user] is_like_space('(')
^  Unify: (291) [user] is_like_space('(')
   Call: (292) [system] char_type('(', space)
^  Redo: (291) [user] is_like_space('(')
^  Unify: (291) [user] is_like_space('(')
   Call: (292) [system] char_type('(', cntrl)
^  Redo: (290) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (290) [user] skip_spaces((0x55aefe44e2f0))
   Call: (290) [system] get_char((0x55aefe44e2f0), _498552)
   Exit: (290) [system] get_char((0x55aefe44e2f0), '(')
   Call: (290) [system] '('='('
   Exit: (290) [system] '('='('
^  Call: (290) [user] read_list(')', (0x55aefe44e2f0), _478054)
^  Unify: (290) [user] read_list(')', (0x55aefe44e2f0), _478054)
^  Call: (291) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (291) [user] skip_spaces((0x55aefe44e2f0))
   Call: (292) [system] peek_char((0x55aefe44e2f0), _505978)
   Exit: (292) [system] peek_char((0x55aefe44e2f0), i)
   Call: (292) [system] i=(;)
^  Redo: (291) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (292) [user] is_like_space(i)
^  Unify: (292) [user] is_like_space(i)
   Call: (293) [system] char_type(i, 'white')
^  Redo: (292) [user] is_like_space(i)
^  Unify: (292) [user] is_like_space(i)
   Call: (293) [system] char_type(i, end_of_line)
^  Redo: (292) [user] is_like_space(i)
^  Unify: (292) [user] is_like_space(i)
   Call: (293) [system] char_type(i, space)
^  Redo: (292) [user] is_like_space(i)
^  Unify: (292) [user] is_like_space(i)
   Call: (293) [system] char_type(i, cntrl)
^  Redo: (291) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (291) [user] skip_spaces((0x55aefe44e2f0))
   Call: (291) [system] peek_char((0x55aefe44e2f0), _522762)
   Exit: (291) [system] peek_char((0x55aefe44e2f0), i)
   Call: (291) [system] i=')'
^  Redo: (290) [user] read_list(')', (0x55aefe44e2f0), _6148)
   Call: (291) [system] i=end_of_file
^  Redo: (290) [user] read_list(')', (0x55aefe44e2f0), _6148)
^  Call: (291) [user] cont_sexpr(')', (0x55aefe44e2f0), _10546)
^  Unify: (291) [user] cont_sexpr(')', (0x55aefe44e2f0), _10546)
^  Call: (292) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (292) [user] skip_spaces((0x55aefe44e2f0))
   Call: (293) [system] peek_char((0x55aefe44e2f0), _14260)
   Exit: (293) [system] peek_char((0x55aefe44e2f0), i)
   Call: (293) [system] i=(;)
^  Redo: (292) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (293) [user] is_like_space(i)
^  Unify: (293) [user] is_like_space(i)
   Call: (294) [system] char_type(i, 'white')
^  Redo: (293) [user] is_like_space(i)
^  Unify: (293) [user] is_like_space(i)
   Call: (294) [system] char_type(i, end_of_line)
^  Redo: (293) [user] is_like_space(i)
^  Unify: (293) [user] is_like_space(i)
   Call: (294) [system] char_type(i, space)
^  Redo: (293) [user] is_like_space(i)
^  Unify: (293) [user] is_like_space(i)
   Call: (294) [system] char_type(i, cntrl)
^  Redo: (292) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (292) [user] skip_spaces((0x55aefe44e2f0))
   Call: (292) [system] get_char((0x55aefe44e2f0), _31044)
   Exit: (292) [system] get_char((0x55aefe44e2f0), i)
   Call: (292) [system] i='('
^  Redo: (291) [user] cont_sexpr(')', (0x55aefe44e2f0), _10546)
   Call: (292) [system] i='['
^  Redo: (291) [user] cont_sexpr(')', (0x55aefe44e2f0), _10546)
   Call: (292) [system] i='{'
^  Redo: (291) [user] cont_sexpr(')', (0x55aefe44e2f0), _10546)
   Call: (292) [system] i='"'
^  Redo: (291) [user] cont_sexpr(')', (0x55aefe44e2f0), _10546)
   Call: (292) [system] i=!
^  Redo: (291) [user] cont_sexpr(')', (0x55aefe44e2f0), _10546)
   Call: (292) [system] i='\''
^  Redo: (291) [user] cont_sexpr(')', (0x55aefe44e2f0), _10546)
   Call: (292) [system] i='`'
^  Redo: (291) [user] cont_sexpr(')', (0x55aefe44e2f0), _10546)
   Call: (292) [system] i=end_of_file
^  Redo: (291) [user] cont_sexpr(')', (0x55aefe44e2f0), _10546)
^  Call: (292) [user] read_symbolic(')', (0x55aefe44e2f0), i, _10546)
^  Unify: (292) [user] read_symbolic(')', (0x55aefe44e2f0), i, _10546)
^  Call: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _49654)
^  Unify: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _49654)
   Call: (294) [system] peek_char((0x55aefe44e2f0), _51520)
   Exit: (294) [system] peek_char((0x55aefe44e2f0), f)
^  Call: (294) [user] is_delimiter(f)
^  Unify: (294) [user] is_delimiter(f)
   Call: (295) [system] char_type(f, space)
^  Redo: (294) [user] is_delimiter(f)
   Call: (295) [system] arg(_57160, v('(', ')', end_of_file), f)
^  Redo: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _49654)
   Call: (294) [system] ')'==f
^  Redo: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _49654)
   Call: (294) [system] get_char((0x55aefe44e2f0), f)
   Exit: (294) [system] get_char((0x55aefe44e2f0), f)
   Call: (294) [system] f=(\)
^  Redo: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _49654)
^  Call: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _64526)
^  Unify: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _64526)
   Call: (295) [system] peek_char((0x55aefe44e2f0), _66392)
   Exit: (295) [system] peek_char((0x55aefe44e2f0), -)
^  Call: (295) [user] is_delimiter(-)
^  Unify: (295) [user] is_delimiter(-)
   Call: (296) [system] char_type(-, space)
^  Redo: (295) [user] is_delimiter(-)
   Call: (296) [system] arg(_72032, v('(', ')', end_of_file), -)
^  Redo: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _64526)
   Call: (295) [system] ')'==(-)
^  Redo: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _64526)
   Call: (295) [system] get_char((0x55aefe44e2f0), -)
   Exit: (295) [system] get_char((0x55aefe44e2f0), -)
   Call: (295) [system] (-)=(\)
^  Redo: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _64526)
^  Call: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _79398)
^  Unify: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _79398)
   Call: (296) [system] peek_char((0x55aefe44e2f0), _81264)
   Exit: (296) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (296) [user] is_delimiter(e)
^  Unify: (296) [user] is_delimiter(e)
   Call: (297) [system] char_type(e, space)
^  Redo: (296) [user] is_delimiter(e)
   Call: (297) [system] arg(_86904, v('(', ')', end_of_file), e)
^  Redo: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _79398)
   Call: (296) [system] ')'==e
^  Redo: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _79398)
   Call: (296) [system] get_char((0x55aefe44e2f0), e)
   Exit: (296) [system] get_char((0x55aefe44e2f0), e)
   Call: (296) [system] e=(\)
^  Redo: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _79398)
^  Call: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _94270)
^  Unify: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _94270)
   Call: (297) [system] peek_char((0x55aefe44e2f0), _96136)
   Exit: (297) [system] peek_char((0x55aefe44e2f0), q)
^  Call: (297) [user] is_delimiter(q)
^  Unify: (297) [user] is_delimiter(q)
   Call: (298) [system] char_type(q, space)
^  Redo: (297) [user] is_delimiter(q)
   Call: (298) [system] arg(_101776, v('(', ')', end_of_file), q)
^  Redo: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _94270)
   Call: (297) [system] ')'==q
^  Redo: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _94270)
   Call: (297) [system] get_char((0x55aefe44e2f0), q)
   Exit: (297) [system] get_char((0x55aefe44e2f0), q)
   Call: (297) [system] q=(\)
^  Redo: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _94270)
^  Call: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _109142)
^  Unify: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _109142)
   Call: (298) [system] peek_char((0x55aefe44e2f0), _111008)
   Exit: (298) [system] peek_char((0x55aefe44e2f0), u)
^  Call: (298) [user] is_delimiter(u)
^  Unify: (298) [user] is_delimiter(u)
   Call: (299) [system] char_type(u, space)
^  Redo: (298) [user] is_delimiter(u)
   Call: (299) [system] arg(_116648, v('(', ')', end_of_file), u)
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _109142)
   Call: (298) [system] ')'==u
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _109142)
   Call: (298) [system] get_char((0x55aefe44e2f0), u)
   Exit: (298) [system] get_char((0x55aefe44e2f0), u)
   Call: (298) [system] u=(\)
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _109142)
^  Call: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _124014)
^  Unify: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _124014)
   Call: (299) [system] peek_char((0x55aefe44e2f0), _125880)
   Exit: (299) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (299) [user] is_delimiter(a)
^  Unify: (299) [user] is_delimiter(a)
   Call: (300) [system] char_type(a, space)
^  Redo: (299) [user] is_delimiter(a)
   Call: (300) [system] arg(_131520, v('(', ')', end_of_file), a)
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _124014)
   Call: (299) [system] ')'==a
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _124014)
   Call: (299) [system] get_char((0x55aefe44e2f0), a)
   Exit: (299) [system] get_char((0x55aefe44e2f0), a)
   Call: (299) [system] a=(\)
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _124014)
^  Call: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _138886)
^  Unify: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _138886)
   Call: (300) [system] peek_char((0x55aefe44e2f0), _140752)
   Exit: (300) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (300) [user] is_delimiter(l)
^  Unify: (300) [user] is_delimiter(l)
   Call: (301) [system] char_type(l, space)
^  Redo: (300) [user] is_delimiter(l)
   Call: (301) [system] arg(_146392, v('(', ')', end_of_file), l)
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _138886)
   Call: (300) [system] ')'==l
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _138886)
   Call: (300) [system] get_char((0x55aefe44e2f0), l)
   Exit: (300) [system] get_char((0x55aefe44e2f0), l)
   Call: (300) [system] l=(\)
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _138886)
^  Call: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _153758)
^  Unify: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _153758)
   Call: (301) [system] peek_char((0x55aefe44e2f0), _155624)
   Exit: (301) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (301) [user] is_delimiter(' ')
^  Unify: (301) [user] is_delimiter(' ')
   Call: (302) [system] char_type(' ', space)
   Exit: (302) [system] char_type(' ', space)
^  Exit: (301) [user] is_delimiter(' ')
   Call: (301) [system] _153758=[]
   Exit: (301) [system] []=[]
^  Exit: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (300) [system] _138886=[l]
   Exit: (300) [system] [l]=[l]
^  Exit: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l])
   Call: (299) [system] _124014=[a, l]
   Exit: (299) [system] [a, l]=[a, l]
^  Exit: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, l])
   Call: (298) [system] _109142=[u, a, l]
   Exit: (298) [system] [u, a, l]=[u, a, l]
^  Exit: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [u, a, l])
   Call: (297) [system] _94270=[q, u, a, l]
   Exit: (297) [system] [q, u, a, l]=[q, u, a, l]
^  Exit: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [q, u, a, l])
   Call: (296) [system] _79398=[e, q, u, a, l]
   Exit: (296) [system] [e, q, u, a, l]=[e, q, u, a, l]
^  Exit: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, q, u, a, l])
   Call: (295) [system] _64526=[-, e, q, u, a, l]
   Exit: (295) [system] [-, e, q, u, a, l]=[-, e, q, u, a, l]
^  Exit: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [-, e, q, u, a, l])
   Call: (294) [system] _49654=[f, -, e, q, u, a, l]
   Exit: (294) [system] [f, -, e, q, u, a, l]=[f, -, e, q, u, a, l]
^  Exit: (293) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [f, -, e, q, u, a, l])
^  Call: (293) [user] classify_and_convert_charseq(i, [f, -, e, q, u, a, l], _10546)
^  Unify: (293) [user] classify_and_convert_charseq(i, [f, -, e, q, u, a, l], _10546)
^  Call: (295) [system] setup_call_cleanup('$notrace'(_186348, _186350), once(user:catch(read_from_chars([i, f, -, e, q, u, a, l], _10546), _186324, fail)), '$restore_trace'(_186348, _186350))
^  Unify: (295) [system] setup_call_cleanup(system:'$notrace'(_186348, _186350), system:once(user:catch(read_from_chars([i, f, -, e, q, u, a, l], _10546), _186324, fail)), system:'$restore_trace'(_186348, _186350))
^  Call: (296) [system] sig_atomic(system:'$notrace'(_186348, _186350))
^  Exit: (295) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([i, f, -, e, q, u, a, l], if-equal), _186324, fail)), system:'$restore_trace'(3, -1))
   Call: (294) [system] atomic(if-equal)
^  Redo: (293) [user] classify_and_convert_charseq(i, [f, -, e, q, u, a, l], _10546)
^  Unify: (293) [user] classify_and_convert_charseq(i, [f, -, e, q, u, a, l], _10546)
   Call: (294) [system] atom_chars(_10546, [i, f, -, e, q, u, a, l])
   Exit: (294) [system] atom_chars('if-equal', [i, f, -, e, q, u, a, l])
^  Exit: (293) [user] classify_and_convert_charseq(i, [f, -, e, q, u, a, l], 'if-equal')
^  Exit: (292) [user] read_symbolic(')', (0x55aefe44e2f0), i, 'if-equal')
^  Exit: (291) [user] cont_sexpr(')', (0x55aefe44e2f0), 'if-equal')
^  Call: (291) [user] read_list(')', (0x55aefe44e2f0), _197594)
^  Unify: (291) [user] read_list(')', (0x55aefe44e2f0), _197594)
^  Call: (292) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (292) [user] skip_spaces((0x55aefe44e2f0))
   Call: (293) [system] peek_char((0x55aefe44e2f0), _201308)
   Exit: (293) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (293) [system] ' '=(;)
^  Redo: (292) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (293) [user] is_like_space(' ')
^  Unify: (293) [user] is_like_space(' ')
   Call: (294) [system] char_type(' ', 'white')
   Exit: (294) [system] char_type(' ', 'white')
^  Exit: (293) [user] is_like_space(' ')
   Call: (293) [system] get_char((0x55aefe44e2f0), _209966)
   Exit: (293) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (293) [user] skip_spaces((0x55aefe44e2f0))
   Call: (294) [system] peek_char((0x55aefe44e2f0), _213594)
   Exit: (294) [system] peek_char((0x55aefe44e2f0), $)
   Call: (294) [system] ($)=(;)
^  Redo: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (294) [user] is_like_space($)
^  Unify: (294) [user] is_like_space($)
   Call: (295) [system] char_type($, 'white')
^  Redo: (294) [user] is_like_space($)
^  Unify: (294) [user] is_like_space($)
   Call: (295) [system] char_type($, end_of_line)
^  Redo: (294) [user] is_like_space($)
^  Unify: (294) [user] is_like_space($)
   Call: (295) [system] char_type($, space)
^  Redo: (294) [user] is_like_space($)
^  Unify: (294) [user] is_like_space($)
   Call: (295) [system] char_type($, cntrl)
^  Redo: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (292) [user] skip_spaces((0x55aefe44e2f0))
   Call: (292) [system] peek_char((0x55aefe44e2f0), _231302)
   Exit: (292) [system] peek_char((0x55aefe44e2f0), $)
   Call: (292) [system] ($)=')'
^  Redo: (291) [user] read_list(')', (0x55aefe44e2f0), _197594)
   Call: (292) [system] ($)=end_of_file
^  Redo: (291) [user] read_list(')', (0x55aefe44e2f0), _197594)
^  Call: (292) [user] cont_sexpr(')', (0x55aefe44e2f0), _236880)
^  Unify: (292) [user] cont_sexpr(')', (0x55aefe44e2f0), _236880)
^  Call: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (293) [user] skip_spaces((0x55aefe44e2f0))
   Call: (294) [system] peek_char((0x55aefe44e2f0), _240594)
   Exit: (294) [system] peek_char((0x55aefe44e2f0), $)
   Call: (294) [system] ($)=(;)
^  Redo: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (294) [user] is_like_space($)
^  Unify: (294) [user] is_like_space($)
   Call: (295) [system] char_type($, 'white')
^  Redo: (294) [user] is_like_space($)
^  Unify: (294) [user] is_like_space($)
   Call: (295) [system] char_type($, end_of_line)
^  Redo: (294) [user] is_like_space($)
^  Unify: (294) [user] is_like_space($)
   Call: (295) [system] char_type($, space)
^  Redo: (294) [user] is_like_space($)
^  Unify: (294) [user] is_like_space($)
   Call: (295) [system] char_type($, cntrl)
^  Redo: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (293) [user] skip_spaces((0x55aefe44e2f0))
   Call: (293) [system] get_char((0x55aefe44e2f0), _257378)
   Exit: (293) [system] get_char((0x55aefe44e2f0), $)
   Call: (293) [system] ($)='('
^  Redo: (292) [user] cont_sexpr(')', (0x55aefe44e2f0), _236880)
   Call: (293) [system] ($)='['
^  Redo: (292) [user] cont_sexpr(')', (0x55aefe44e2f0), _236880)
   Call: (293) [system] ($)='{'
^  Redo: (292) [user] cont_sexpr(')', (0x55aefe44e2f0), _236880)
   Call: (293) [system] ($)='"'
^  Redo: (292) [user] cont_sexpr(')', (0x55aefe44e2f0), _236880)
   Call: (293) [system] ($)=!
^  Redo: (292) [user] cont_sexpr(')', (0x55aefe44e2f0), _236880)
   Call: (293) [system] ($)='\''
^  Redo: (292) [user] cont_sexpr(')', (0x55aefe44e2f0), _236880)
   Call: (293) [system] ($)='`'
^  Redo: (292) [user] cont_sexpr(')', (0x55aefe44e2f0), _236880)
   Call: (293) [system] ($)=end_of_file
^  Redo: (292) [user] cont_sexpr(')', (0x55aefe44e2f0), _236880)
^  Call: (293) [user] read_symbolic(')', (0x55aefe44e2f0), $, _236880)
^  Unify: (293) [user] read_symbolic(')', (0x55aefe44e2f0), $, _236880)
^  Call: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275988)
^  Unify: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275988)
   Call: (295) [system] peek_char((0x55aefe44e2f0), _277854)
   Exit: (295) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (295) [user] is_delimiter(a)
^  Unify: (295) [user] is_delimiter(a)
   Call: (296) [system] char_type(a, space)
^  Redo: (295) [user] is_delimiter(a)
   Call: (296) [system] arg(_283494, v('(', ')', end_of_file), a)
^  Redo: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275988)
   Call: (295) [system] ')'==a
^  Redo: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275988)
   Call: (295) [system] get_char((0x55aefe44e2f0), a)
   Exit: (295) [system] get_char((0x55aefe44e2f0), a)
   Call: (295) [system] a=(\)
^  Redo: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275988)
^  Call: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _290860)
^  Unify: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _290860)
   Call: (296) [system] peek_char((0x55aefe44e2f0), _292726)
   Exit: (296) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (296) [user] is_delimiter(t)
^  Unify: (296) [user] is_delimiter(t)
   Call: (297) [system] char_type(t, space)
^  Redo: (296) [user] is_delimiter(t)
   Call: (297) [system] arg(_298366, v('(', ')', end_of_file), t)
^  Redo: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _290860)
   Call: (296) [system] ')'==t
^  Redo: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _290860)
   Call: (296) [system] get_char((0x55aefe44e2f0), t)
   Exit: (296) [system] get_char((0x55aefe44e2f0), t)
   Call: (296) [system] t=(\)
^  Redo: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _290860)
^  Call: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _305732)
^  Unify: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _305732)
   Call: (297) [system] peek_char((0x55aefe44e2f0), _307598)
   Exit: (297) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (297) [user] is_delimiter(o)
^  Unify: (297) [user] is_delimiter(o)
   Call: (298) [system] char_type(o, space)
^  Redo: (297) [user] is_delimiter(o)
   Call: (298) [system] arg(_313238, v('(', ')', end_of_file), o)
^  Redo: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _305732)
   Call: (297) [system] ')'==o
^  Redo: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _305732)
   Call: (297) [system] get_char((0x55aefe44e2f0), o)
   Exit: (297) [system] get_char((0x55aefe44e2f0), o)
   Call: (297) [system] o=(\)
^  Redo: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _305732)
^  Call: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _320604)
^  Unify: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _320604)
   Call: (298) [system] peek_char((0x55aefe44e2f0), _322470)
   Exit: (298) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (298) [user] is_delimiter(m)
^  Unify: (298) [user] is_delimiter(m)
   Call: (299) [system] char_type(m, space)
^  Redo: (298) [user] is_delimiter(m)
   Call: (299) [system] arg(_328110, v('(', ')', end_of_file), m)
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _320604)
   Call: (298) [system] ')'==m
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _320604)
   Call: (298) [system] get_char((0x55aefe44e2f0), m)
   Exit: (298) [system] get_char((0x55aefe44e2f0), m)
   Call: (298) [system] m=(\)
^  Redo: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _320604)
^  Call: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _335476)
^  Unify: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _335476)
   Call: (299) [system] peek_char((0x55aefe44e2f0), _337342)
   Exit: (299) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (299) [user] is_delimiter(' ')
^  Unify: (299) [user] is_delimiter(' ')
   Call: (300) [system] char_type(' ', space)
   Exit: (300) [system] char_type(' ', space)
^  Exit: (299) [user] is_delimiter(' ')
   Call: (299) [system] _335476=[]
   Exit: (299) [system] []=[]
^  Exit: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (298) [system] _320604=[m]
   Exit: (298) [system] [m]=[m]
^  Exit: (297) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (297) [system] _305732=[o, m]
   Exit: (297) [system] [o, m]=[o, m]
^  Exit: (296) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (296) [system] _290860=[t, o, m]
   Exit: (296) [system] [t, o, m]=[t, o, m]
^  Exit: (295) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
   Call: (295) [system] _275988=[a, t, o, m]
   Exit: (295) [system] [a, t, o, m]=[a, t, o, m]
^  Exit: (294) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, t, o, m])
^  Call: (294) [user] classify_and_convert_charseq($, [a, t, o, m], _236880)
^  Unify: (294) [user] classify_and_convert_charseq($, [a, t, o, m], '$VAR'(_358726))
   Call: (295) [system] atom_chars(_358726, ['_', a, t, o, m])
   Exit: (295) [system] atom_chars('_atom', ['_', a, t, o, m])
^  Exit: (294) [user] classify_and_convert_charseq($, [a, t, o, m], _atom)
^  Exit: (293) [user] read_symbolic(')', (0x55aefe44e2f0), $, _atom)
^  Exit: (292) [user] cont_sexpr(')', (0x55aefe44e2f0), _atom)
^  Call: (292) [user] read_list(')', (0x55aefe44e2f0), _364322)
^  Unify: (292) [user] read_list(')', (0x55aefe44e2f0), _364322)
^  Call: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (293) [user] skip_spaces((0x55aefe44e2f0))
   Call: (294) [system] peek_char((0x55aefe44e2f0), _368036)
   Exit: (294) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (294) [system] ' '=(;)
^  Redo: (293) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (294) [user] is_like_space(' ')
^  Unify: (294) [user] is_like_space(' ')
   Call: (295) [system] char_type(' ', 'white')
   Exit: (295) [system] char_type(' ', 'white')
^  Exit: (294) [user] is_like_space(' ')
   Call: (294) [system] get_char((0x55aefe44e2f0), _376694)
   Exit: (294) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (294) [user] skip_spaces((0x55aefe44e2f0))
   Call: (295) [system] peek_char((0x55aefe44e2f0), _380322)
   Exit: (295) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (295) [system] '('=(;)
^  Redo: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (295) [user] is_like_space('(')
^  Unify: (295) [user] is_like_space('(')
   Call: (296) [system] char_type('(', 'white')
^  Redo: (295) [user] is_like_space('(')
^  Unify: (295) [user] is_like_space('(')
   Call: (296) [system] char_type('(', end_of_line)
^  Redo: (295) [user] is_like_space('(')
^  Unify: (295) [user] is_like_space('(')
   Call: (296) [system] char_type('(', space)
^  Redo: (295) [user] is_like_space('(')
^  Unify: (295) [user] is_like_space('(')
   Call: (296) [system] char_type('(', cntrl)
^  Redo: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (293) [user] skip_spaces((0x55aefe44e2f0))
   Call: (293) [system] peek_char((0x55aefe44e2f0), _398030)
   Exit: (293) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (293) [system] '('=')'
^  Redo: (292) [user] read_list(')', (0x55aefe44e2f0), _364322)
   Call: (293) [system] '('=end_of_file
^  Redo: (292) [user] read_list(')', (0x55aefe44e2f0), _364322)
^  Call: (293) [user] cont_sexpr(')', (0x55aefe44e2f0), _403608)
^  Unify: (293) [user] cont_sexpr(')', (0x55aefe44e2f0), _403608)
^  Call: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (294) [user] skip_spaces((0x55aefe44e2f0))
   Call: (295) [system] peek_char((0x55aefe44e2f0), _407322)
   Exit: (295) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (295) [system] '('=(;)
^  Redo: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (295) [user] is_like_space('(')
^  Unify: (295) [user] is_like_space('(')
   Call: (296) [system] char_type('(', 'white')
^  Redo: (295) [user] is_like_space('(')
^  Unify: (295) [user] is_like_space('(')
   Call: (296) [system] char_type('(', end_of_line)
^  Redo: (295) [user] is_like_space('(')
^  Unify: (295) [user] is_like_space('(')
   Call: (296) [system] char_type('(', space)
^  Redo: (295) [user] is_like_space('(')
^  Unify: (295) [user] is_like_space('(')
   Call: (296) [system] char_type('(', cntrl)
^  Redo: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (294) [user] skip_spaces((0x55aefe44e2f0))
   Call: (294) [system] get_char((0x55aefe44e2f0), _424106)
   Exit: (294) [system] get_char((0x55aefe44e2f0), '(')
   Call: (294) [system] '('='('
   Exit: (294) [system] '('='('
^  Call: (294) [user] read_list(')', (0x55aefe44e2f0), _403608)
^  Unify: (294) [user] read_list(')', (0x55aefe44e2f0), _403608)
^  Call: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (295) [user] skip_spaces((0x55aefe44e2f0))
   Call: (296) [system] peek_char((0x55aefe44e2f0), _431532)
   Exit: (296) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (296) [system] ')'=(;)
^  Redo: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (296) [user] is_like_space(')')
^  Unify: (296) [user] is_like_space(')')
   Call: (297) [system] char_type(')', 'white')
^  Redo: (296) [user] is_like_space(')')
^  Unify: (296) [user] is_like_space(')')
   Call: (297) [system] char_type(')', end_of_line)
^  Redo: (296) [user] is_like_space(')')
^  Unify: (296) [user] is_like_space(')')
   Call: (297) [system] char_type(')', space)
^  Redo: (296) [user] is_like_space(')')
^  Unify: (296) [user] is_like_space(')')
   Call: (297) [system] char_type(')', cntrl)
^  Redo: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (295) [user] skip_spaces((0x55aefe44e2f0))
   Call: (295) [system] peek_char((0x55aefe44e2f0), _448316)
   Exit: (295) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (295) [system] ')'=')'
   Exit: (295) [system] ')'=')'
   Call: (295) [system] get_char((0x55aefe44e2f0), _452106)
   Exit: (295) [system] get_char((0x55aefe44e2f0), ')')
   Call: (295) [system] _403608=[]
   Exit: (295) [system] []=[]
^  Exit: (294) [user] read_list(')', (0x55aefe44e2f0), [])
^  Exit: (293) [user] cont_sexpr(')', (0x55aefe44e2f0), [])
^  Call: (293) [user] read_list(')', (0x55aefe44e2f0), _457606)
^  Unify: (293) [user] read_list(')', (0x55aefe44e2f0), _457606)
^  Call: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (294) [user] skip_spaces((0x55aefe44e2f0))
   Call: (295) [system] peek_char((0x55aefe44e2f0), _461320)
   Exit: (295) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (295) [system] '\n'=(;)
^  Redo: (294) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (295) [user] is_like_space('\n')
^  Unify: (295) [user] is_like_space('\n')
   Call: (296) [system] char_type('\n', 'white')
^  Redo: (295) [user] is_like_space('\n')
^  Unify: (295) [user] is_like_space('\n')
   Call: (296) [system] char_type('\n', end_of_line)
   Exit: (296) [system] char_type('\n', end_of_line)
^  Exit: (295) [user] is_like_space('\n')
   Call: (295) [system] get_char((0x55aefe44e2f0), _472632)
   Exit: (295) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (295) [user] skip_spaces((0x55aefe44e2f0))
   Call: (296) [system] peek_char((0x55aefe44e2f0), _476260)
   Exit: (296) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (296) [system] ' '=(;)
^  Redo: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (296) [user] is_like_space(' ')
^  Unify: (296) [user] is_like_space(' ')
   Call: (297) [system] char_type(' ', 'white')
   Exit: (297) [system] char_type(' ', 'white')
^  Exit: (296) [user] is_like_space(' ')
   Call: (296) [system] get_char((0x55aefe44e2f0), _484918)
   Exit: (296) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (296) [user] skip_spaces((0x55aefe44e2f0))
   Call: (297) [system] peek_char((0x55aefe44e2f0), _488546)
   Exit: (297) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (297) [system] ' '=(;)
^  Redo: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (297) [user] is_like_space(' ')
^  Unify: (297) [user] is_like_space(' ')
   Call: (298) [system] char_type(' ', 'white')
   Exit: (298) [system] char_type(' ', 'white')
^  Exit: (297) [user] is_like_space(' ')
   Call: (297) [system] get_char((0x55aefe44e2f0), _497204)
   Exit: (297) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (297) [user] skip_spaces((0x55aefe44e2f0))
   Call: (298) [system] peek_char((0x55aefe44e2f0), _500832)
   Exit: (298) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (298) [system] ' '=(;)
^  Redo: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (298) [user] is_like_space(' ')
^  Unify: (298) [user] is_like_space(' ')
   Call: (299) [system] char_type(' ', 'white')
   Exit: (299) [system] char_type(' ', 'white')
^  Exit: (298) [user] is_like_space(' ')
   Call: (298) [system] get_char((0x55aefe44e2f0), _509490)
   Exit: (298) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (298) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (298) [user] skip_spaces((0x55aefe44e2f0))
   Call: (299) [system] peek_char((0x55aefe44e2f0), _513118)
   Exit: (299) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (299) [system] ' '=(;)
^  Redo: (298) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (299) [user] is_like_space(' ')
^  Unify: (299) [user] is_like_space(' ')
   Call: (300) [system] char_type(' ', 'white')
   Exit: (300) [system] char_type(' ', 'white')
^  Exit: (299) [user] is_like_space(' ')
   Call: (299) [system] get_char((0x55aefe44e2f0), _521776)
   Exit: (299) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (299) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (299) [user] skip_spaces((0x55aefe44e2f0))
   Call: (300) [system] peek_char((0x55aefe44e2f0), _7686)
   Exit: (300) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (300) [system] ' '=(;)
^  Redo: (299) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (300) [user] is_like_space(' ')
^  Unify: (300) [user] is_like_space(' ')
   Call: (301) [system] char_type(' ', 'white')
   Exit: (301) [system] char_type(' ', 'white')
^  Exit: (300) [user] is_like_space(' ')
   Call: (300) [system] get_char((0x55aefe44e2f0), _16344)
   Exit: (300) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (300) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (300) [user] skip_spaces((0x55aefe44e2f0))
   Call: (301) [system] peek_char((0x55aefe44e2f0), _19972)
   Exit: (301) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (301) [system] ' '=(;)
^  Redo: (300) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (301) [user] is_like_space(' ')
^  Unify: (301) [user] is_like_space(' ')
   Call: (302) [system] char_type(' ', 'white')
   Exit: (302) [system] char_type(' ', 'white')
^  Exit: (301) [user] is_like_space(' ')
   Call: (301) [system] get_char((0x55aefe44e2f0), _28630)
   Exit: (301) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (301) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (301) [user] skip_spaces((0x55aefe44e2f0))
   Call: (302) [system] peek_char((0x55aefe44e2f0), _32258)
   Exit: (302) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (302) [system] ' '=(;)
^  Redo: (301) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (302) [user] is_like_space(' ')
^  Unify: (302) [user] is_like_space(' ')
   Call: (303) [system] char_type(' ', 'white')
   Exit: (303) [system] char_type(' ', 'white')
^  Exit: (302) [user] is_like_space(' ')
   Call: (302) [system] get_char((0x55aefe44e2f0), _40916)
   Exit: (302) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (302) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (302) [user] skip_spaces((0x55aefe44e2f0))
   Call: (303) [system] peek_char((0x55aefe44e2f0), _44544)
   Exit: (303) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (303) [system] ' '=(;)
^  Redo: (302) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (303) [user] is_like_space(' ')
^  Unify: (303) [user] is_like_space(' ')
   Call: (304) [system] char_type(' ', 'white')
   Exit: (304) [system] char_type(' ', 'white')
^  Exit: (303) [user] is_like_space(' ')
   Call: (303) [system] get_char((0x55aefe44e2f0), _53202)
   Exit: (303) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (303) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (303) [user] skip_spaces((0x55aefe44e2f0))
   Call: (304) [system] peek_char((0x55aefe44e2f0), _56830)
   Exit: (304) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (304) [system] '('=(;)
^  Redo: (303) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (304) [user] is_like_space('(')
^  Unify: (304) [user] is_like_space('(')
   Call: (305) [system] char_type('(', 'white')
^  Redo: (304) [user] is_like_space('(')
^  Unify: (304) [user] is_like_space('(')
   Call: (305) [system] char_type('(', end_of_line)
^  Redo: (304) [user] is_like_space('(')
^  Unify: (304) [user] is_like_space('(')
   Call: (305) [system] char_type('(', space)
^  Redo: (304) [user] is_like_space('(')
^  Unify: (304) [user] is_like_space('(')
   Call: (305) [system] char_type('(', cntrl)
^  Redo: (303) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (303) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (302) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (301) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (300) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (299) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (298) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (294) [user] skip_spaces((0x55aefe44e2f0))
   Call: (294) [system] peek_char((0x55aefe44e2f0), _81930)
   Exit: (294) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (294) [system] '('=')'
^  Redo: (293) [user] read_list(')', (0x55aefe44e2f0), _6172)
   Call: (294) [system] '('=end_of_file
^  Redo: (293) [user] read_list(')', (0x55aefe44e2f0), _6172)
^  Call: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), _87508)
^  Unify: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), _87508)
^  Call: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (295) [user] skip_spaces((0x55aefe44e2f0))
   Call: (296) [system] peek_char((0x55aefe44e2f0), _91222)
   Exit: (296) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (296) [system] '('=(;)
^  Redo: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (296) [user] is_like_space('(')
^  Unify: (296) [user] is_like_space('(')
   Call: (297) [system] char_type('(', 'white')
^  Redo: (296) [user] is_like_space('(')
^  Unify: (296) [user] is_like_space('(')
   Call: (297) [system] char_type('(', end_of_line)
^  Redo: (296) [user] is_like_space('(')
^  Unify: (296) [user] is_like_space('(')
   Call: (297) [system] char_type('(', space)
^  Redo: (296) [user] is_like_space('(')
^  Unify: (296) [user] is_like_space('(')
   Call: (297) [system] char_type('(', cntrl)
^  Redo: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (295) [user] skip_spaces((0x55aefe44e2f0))
   Call: (295) [system] get_char((0x55aefe44e2f0), _108006)
   Exit: (295) [system] get_char((0x55aefe44e2f0), '(')
   Call: (295) [system] '('='('
   Exit: (295) [system] '('='('
^  Call: (295) [user] read_list(')', (0x55aefe44e2f0), _87508)
^  Unify: (295) [user] read_list(')', (0x55aefe44e2f0), _87508)
^  Call: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (296) [user] skip_spaces((0x55aefe44e2f0))
   Call: (297) [system] peek_char((0x55aefe44e2f0), _115432)
   Exit: (297) [system] peek_char((0x55aefe44e2f0), r)
   Call: (297) [system] r=(;)
^  Redo: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (297) [user] is_like_space(r)
^  Unify: (297) [user] is_like_space(r)
   Call: (298) [system] char_type(r, 'white')
^  Redo: (297) [user] is_like_space(r)
^  Unify: (297) [user] is_like_space(r)
   Call: (298) [system] char_type(r, end_of_line)
^  Redo: (297) [user] is_like_space(r)
^  Unify: (297) [user] is_like_space(r)
   Call: (298) [system] char_type(r, space)
^  Redo: (297) [user] is_like_space(r)
^  Unify: (297) [user] is_like_space(r)
   Call: (298) [system] char_type(r, cntrl)
^  Redo: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (296) [user] skip_spaces((0x55aefe44e2f0))
   Call: (296) [system] peek_char((0x55aefe44e2f0), _132216)
   Exit: (296) [system] peek_char((0x55aefe44e2f0), r)
   Call: (296) [system] r=')'
^  Redo: (295) [user] read_list(')', (0x55aefe44e2f0), _87508)
   Call: (296) [system] r=end_of_file
^  Redo: (295) [user] read_list(')', (0x55aefe44e2f0), _87508)
^  Call: (296) [user] cont_sexpr(')', (0x55aefe44e2f0), _137794)
^  Unify: (296) [user] cont_sexpr(')', (0x55aefe44e2f0), _137794)
^  Call: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (297) [user] skip_spaces((0x55aefe44e2f0))
   Call: (298) [system] peek_char((0x55aefe44e2f0), _141508)
   Exit: (298) [system] peek_char((0x55aefe44e2f0), r)
   Call: (298) [system] r=(;)
^  Redo: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (298) [user] is_like_space(r)
^  Unify: (298) [user] is_like_space(r)
   Call: (299) [system] char_type(r, 'white')
^  Redo: (298) [user] is_like_space(r)
^  Unify: (298) [user] is_like_space(r)
   Call: (299) [system] char_type(r, end_of_line)
^  Redo: (298) [user] is_like_space(r)
^  Unify: (298) [user] is_like_space(r)
   Call: (299) [system] char_type(r, space)
^  Redo: (298) [user] is_like_space(r)
^  Unify: (298) [user] is_like_space(r)
   Call: (299) [system] char_type(r, cntrl)
^  Redo: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (297) [user] skip_spaces((0x55aefe44e2f0))
   Call: (297) [system] get_char((0x55aefe44e2f0), _158292)
   Exit: (297) [system] get_char((0x55aefe44e2f0), r)
   Call: (297) [system] r='('
^  Redo: (296) [user] cont_sexpr(')', (0x55aefe44e2f0), _137794)
   Call: (297) [system] r='['
^  Redo: (296) [user] cont_sexpr(')', (0x55aefe44e2f0), _137794)
   Call: (297) [system] r='{'
^  Redo: (296) [user] cont_sexpr(')', (0x55aefe44e2f0), _137794)
   Call: (297) [system] r='"'
^  Redo: (296) [user] cont_sexpr(')', (0x55aefe44e2f0), _137794)
   Call: (297) [system] r=!
^  Redo: (296) [user] cont_sexpr(')', (0x55aefe44e2f0), _137794)
   Call: (297) [system] r='\''
^  Redo: (296) [user] cont_sexpr(')', (0x55aefe44e2f0), _137794)
   Call: (297) [system] r='`'
^  Redo: (296) [user] cont_sexpr(')', (0x55aefe44e2f0), _137794)
   Call: (297) [system] r=end_of_file
^  Redo: (296) [user] cont_sexpr(')', (0x55aefe44e2f0), _137794)
^  Call: (297) [user] read_symbolic(')', (0x55aefe44e2f0), r, _137794)
^  Unify: (297) [user] read_symbolic(')', (0x55aefe44e2f0), r, _137794)
^  Call: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _176902)
^  Unify: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _176902)
   Call: (299) [system] peek_char((0x55aefe44e2f0), _178768)
   Exit: (299) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (299) [user] is_delimiter(e)
^  Unify: (299) [user] is_delimiter(e)
   Call: (300) [system] char_type(e, space)
^  Redo: (299) [user] is_delimiter(e)
   Call: (300) [system] arg(_184408, v('(', ')', end_of_file), e)
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _176902)
   Call: (299) [system] ')'==e
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _176902)
   Call: (299) [system] get_char((0x55aefe44e2f0), e)
   Exit: (299) [system] get_char((0x55aefe44e2f0), e)
   Call: (299) [system] e=(\)
^  Redo: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _176902)
^  Call: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _191774)
^  Unify: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _191774)
   Call: (300) [system] peek_char((0x55aefe44e2f0), _193640)
   Exit: (300) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (300) [user] is_delimiter(t)
^  Unify: (300) [user] is_delimiter(t)
   Call: (301) [system] char_type(t, space)
^  Redo: (300) [user] is_delimiter(t)
   Call: (301) [system] arg(_199280, v('(', ')', end_of_file), t)
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _191774)
   Call: (300) [system] ')'==t
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _191774)
   Call: (300) [system] get_char((0x55aefe44e2f0), t)
   Exit: (300) [system] get_char((0x55aefe44e2f0), t)
   Call: (300) [system] t=(\)
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _191774)
^  Call: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _206646)
^  Unify: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _206646)
   Call: (301) [system] peek_char((0x55aefe44e2f0), _208512)
   Exit: (301) [system] peek_char((0x55aefe44e2f0), u)
^  Call: (301) [user] is_delimiter(u)
^  Unify: (301) [user] is_delimiter(u)
   Call: (302) [system] char_type(u, space)
^  Redo: (301) [user] is_delimiter(u)
   Call: (302) [system] arg(_214152, v('(', ')', end_of_file), u)
^  Redo: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _206646)
   Call: (301) [system] ')'==u
^  Redo: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _206646)
   Call: (301) [system] get_char((0x55aefe44e2f0), u)
   Exit: (301) [system] get_char((0x55aefe44e2f0), u)
   Call: (301) [system] u=(\)
^  Redo: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _206646)
^  Call: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _221518)
^  Unify: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _221518)
   Call: (302) [system] peek_char((0x55aefe44e2f0), _223384)
   Exit: (302) [system] peek_char((0x55aefe44e2f0), r)
^  Call: (302) [user] is_delimiter(r)
^  Unify: (302) [user] is_delimiter(r)
   Call: (303) [system] char_type(r, space)
^  Redo: (302) [user] is_delimiter(r)
   Call: (303) [system] arg(_229024, v('(', ')', end_of_file), r)
^  Redo: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _221518)
   Call: (302) [system] ')'==r
^  Redo: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _221518)
   Call: (302) [system] get_char((0x55aefe44e2f0), r)
   Exit: (302) [system] get_char((0x55aefe44e2f0), r)
   Call: (302) [system] r=(\)
^  Redo: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _221518)
^  Call: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _236390)
^  Unify: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _236390)
   Call: (303) [system] peek_char((0x55aefe44e2f0), _238256)
   Exit: (303) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (303) [user] is_delimiter(n)
^  Unify: (303) [user] is_delimiter(n)
   Call: (304) [system] char_type(n, space)
^  Redo: (303) [user] is_delimiter(n)
   Call: (304) [system] arg(_243896, v('(', ')', end_of_file), n)
^  Redo: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _236390)
   Call: (303) [system] ')'==n
^  Redo: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _236390)
   Call: (303) [system] get_char((0x55aefe44e2f0), n)
   Exit: (303) [system] get_char((0x55aefe44e2f0), n)
   Call: (303) [system] n=(\)
^  Redo: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _236390)
^  Call: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _251262)
^  Unify: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _251262)
   Call: (304) [system] peek_char((0x55aefe44e2f0), _253128)
   Exit: (304) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (304) [user] is_delimiter(' ')
^  Unify: (304) [user] is_delimiter(' ')
   Call: (305) [system] char_type(' ', space)
   Exit: (305) [system] char_type(' ', space)
^  Exit: (304) [user] is_delimiter(' ')
   Call: (304) [system] _251262=[]
   Exit: (304) [system] []=[]
^  Exit: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (303) [system] _236390=[n]
   Exit: (303) [system] [n]=[n]
^  Exit: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (302) [system] _221518=[r, n]
   Exit: (302) [system] [r, n]=[r, n]
^  Exit: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [r, n])
   Call: (301) [system] _206646=[u, r, n]
   Exit: (301) [system] [u, r, n]=[u, r, n]
^  Exit: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [u, r, n])
   Call: (300) [system] _191774=[t, u, r, n]
   Exit: (300) [system] [t, u, r, n]=[t, u, r, n]
^  Exit: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, u, r, n])
   Call: (299) [system] _176902=[e, t, u, r, n]
   Exit: (299) [system] [e, t, u, r, n]=[e, t, u, r, n]
^  Exit: (298) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, t, u, r, n])
^  Call: (298) [user] classify_and_convert_charseq(r, [e, t, u, r, n], _137794)
^  Unify: (298) [user] classify_and_convert_charseq(r, [e, t, u, r, n], _137794)
^  Call: (300) [system] setup_call_cleanup('$notrace'(_278264, _278266), once(user:catch(read_from_chars([r, e, t, u, r, n], _137794), _278240, fail)), '$restore_trace'(_278264, _278266))
^  Unify: (300) [system] setup_call_cleanup(system:'$notrace'(_278264, _278266), system:once(user:catch(read_from_chars([r, e, t, u, r, n], _137794), _278240, fail)), system:'$restore_trace'(_278264, _278266))
^  Call: (301) [system] sig_atomic(system:'$notrace'(_278264, _278266))
^  Exit: (300) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([r, e, t, u, r, n], return), _278240, fail)), system:'$restore_trace'(3, -1))
   Call: (299) [system] atomic(return)
   Exit: (299) [system] atomic(return)
^  Exit: (298) [user] classify_and_convert_charseq(r, [e, t, u, r, n], return)
^  Exit: (297) [user] read_symbolic(')', (0x55aefe44e2f0), r, return)
^  Exit: (296) [user] cont_sexpr(')', (0x55aefe44e2f0), return)
^  Call: (296) [user] read_list(')', (0x55aefe44e2f0), _286702)
^  Unify: (296) [user] read_list(')', (0x55aefe44e2f0), _286702)
^  Call: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (297) [user] skip_spaces((0x55aefe44e2f0))
   Call: (298) [system] peek_char((0x55aefe44e2f0), _290416)
   Exit: (298) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (298) [system] ' '=(;)
^  Redo: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (298) [user] is_like_space(' ')
^  Unify: (298) [user] is_like_space(' ')
   Call: (299) [system] char_type(' ', 'white')
   Exit: (299) [system] char_type(' ', 'white')
^  Exit: (298) [user] is_like_space(' ')
   Call: (298) [system] get_char((0x55aefe44e2f0), _299074)
   Exit: (298) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (298) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (298) [user] skip_spaces((0x55aefe44e2f0))
   Call: (299) [system] peek_char((0x55aefe44e2f0), _302702)
   Exit: (299) [system] peek_char((0x55aefe44e2f0), $)
   Call: (299) [system] ($)=(;)
^  Redo: (298) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (299) [user] is_like_space($)
^  Unify: (299) [user] is_like_space($)
   Call: (300) [system] char_type($, 'white')
^  Redo: (299) [user] is_like_space($)
^  Unify: (299) [user] is_like_space($)
   Call: (300) [system] char_type($, end_of_line)
^  Redo: (299) [user] is_like_space($)
^  Unify: (299) [user] is_like_space($)
   Call: (300) [system] char_type($, space)
^  Redo: (299) [user] is_like_space($)
^  Unify: (299) [user] is_like_space($)
   Call: (300) [system] char_type($, cntrl)
^  Redo: (298) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (298) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (297) [user] skip_spaces((0x55aefe44e2f0))
   Call: (297) [system] peek_char((0x55aefe44e2f0), _320410)
   Exit: (297) [system] peek_char((0x55aefe44e2f0), $)
   Call: (297) [system] ($)=')'
^  Redo: (296) [user] read_list(')', (0x55aefe44e2f0), _286702)
   Call: (297) [system] ($)=end_of_file
^  Redo: (296) [user] read_list(')', (0x55aefe44e2f0), _286702)
^  Call: (297) [user] cont_sexpr(')', (0x55aefe44e2f0), _325988)
^  Unify: (297) [user] cont_sexpr(')', (0x55aefe44e2f0), _325988)
^  Call: (298) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (298) [user] skip_spaces((0x55aefe44e2f0))
   Call: (299) [system] peek_char((0x55aefe44e2f0), _329702)
   Exit: (299) [system] peek_char((0x55aefe44e2f0), $)
   Call: (299) [system] ($)=(;)
^  Redo: (298) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (299) [user] is_like_space($)
^  Unify: (299) [user] is_like_space($)
   Call: (300) [system] char_type($, 'white')
^  Redo: (299) [user] is_like_space($)
^  Unify: (299) [user] is_like_space($)
   Call: (300) [system] char_type($, end_of_line)
^  Redo: (299) [user] is_like_space($)
^  Unify: (299) [user] is_like_space($)
   Call: (300) [system] char_type($, space)
^  Redo: (299) [user] is_like_space($)
^  Unify: (299) [user] is_like_space($)
   Call: (300) [system] char_type($, cntrl)
^  Redo: (298) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (298) [user] skip_spaces((0x55aefe44e2f0))
   Call: (298) [system] get_char((0x55aefe44e2f0), _346486)
   Exit: (298) [system] get_char((0x55aefe44e2f0), $)
   Call: (298) [system] ($)='('
^  Redo: (297) [user] cont_sexpr(')', (0x55aefe44e2f0), _325988)
   Call: (298) [system] ($)='['
^  Redo: (297) [user] cont_sexpr(')', (0x55aefe44e2f0), _325988)
   Call: (298) [system] ($)='{'
^  Redo: (297) [user] cont_sexpr(')', (0x55aefe44e2f0), _325988)
   Call: (298) [system] ($)='"'
^  Redo: (297) [user] cont_sexpr(')', (0x55aefe44e2f0), _325988)
   Call: (298) [system] ($)=!
^  Redo: (297) [user] cont_sexpr(')', (0x55aefe44e2f0), _325988)
   Call: (298) [system] ($)='\''
^  Redo: (297) [user] cont_sexpr(')', (0x55aefe44e2f0), _325988)
   Call: (298) [system] ($)='`'
^  Redo: (297) [user] cont_sexpr(')', (0x55aefe44e2f0), _325988)
   Call: (298) [system] ($)=end_of_file
^  Redo: (297) [user] cont_sexpr(')', (0x55aefe44e2f0), _325988)
^  Call: (298) [user] read_symbolic(')', (0x55aefe44e2f0), $, _325988)
^  Unify: (298) [user] read_symbolic(')', (0x55aefe44e2f0), $, _325988)
^  Call: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _365096)
^  Unify: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _365096)
   Call: (300) [system] peek_char((0x55aefe44e2f0), _366962)
   Exit: (300) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (300) [user] is_delimiter(e)
^  Unify: (300) [user] is_delimiter(e)
   Call: (301) [system] char_type(e, space)
^  Redo: (300) [user] is_delimiter(e)
   Call: (301) [system] arg(_372602, v('(', ')', end_of_file), e)
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _365096)
   Call: (300) [system] ')'==e
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _365096)
   Call: (300) [system] get_char((0x55aefe44e2f0), e)
   Exit: (300) [system] get_char((0x55aefe44e2f0), e)
   Call: (300) [system] e=(\)
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _365096)
^  Call: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _379968)
^  Unify: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _379968)
   Call: (301) [system] peek_char((0x55aefe44e2f0), _381834)
   Exit: (301) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (301) [user] is_delimiter(l)
^  Unify: (301) [user] is_delimiter(l)
   Call: (302) [system] char_type(l, space)
^  Redo: (301) [user] is_delimiter(l)
   Call: (302) [system] arg(_387474, v('(', ')', end_of_file), l)
^  Redo: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _379968)
   Call: (301) [system] ')'==l
^  Redo: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _379968)
   Call: (301) [system] get_char((0x55aefe44e2f0), l)
   Exit: (301) [system] get_char((0x55aefe44e2f0), l)
   Call: (301) [system] l=(\)
^  Redo: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _379968)
^  Call: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _394840)
^  Unify: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _394840)
   Call: (302) [system] peek_char((0x55aefe44e2f0), _396706)
   Exit: (302) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (302) [user] is_delimiter(s)
^  Unify: (302) [user] is_delimiter(s)
   Call: (303) [system] char_type(s, space)
^  Redo: (302) [user] is_delimiter(s)
   Call: (303) [system] arg(_402346, v('(', ')', end_of_file), s)
^  Redo: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _394840)
   Call: (302) [system] ')'==s
^  Redo: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _394840)
   Call: (302) [system] get_char((0x55aefe44e2f0), s)
   Exit: (302) [system] get_char((0x55aefe44e2f0), s)
   Call: (302) [system] s=(\)
^  Redo: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _394840)
^  Call: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _409712)
^  Unify: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _409712)
   Call: (303) [system] peek_char((0x55aefe44e2f0), _411578)
   Exit: (303) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (303) [user] is_delimiter(e)
^  Unify: (303) [user] is_delimiter(e)
   Call: (304) [system] char_type(e, space)
^  Redo: (303) [user] is_delimiter(e)
   Call: (304) [system] arg(_417218, v('(', ')', end_of_file), e)
^  Redo: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _409712)
   Call: (303) [system] ')'==e
^  Redo: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _409712)
   Call: (303) [system] get_char((0x55aefe44e2f0), e)
   Exit: (303) [system] get_char((0x55aefe44e2f0), e)
   Call: (303) [system] e=(\)
^  Redo: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _409712)
^  Call: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _424584)
^  Unify: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _424584)
   Call: (304) [system] peek_char((0x55aefe44e2f0), _426450)
   Exit: (304) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (304) [user] is_delimiter(')')
^  Unify: (304) [user] is_delimiter(')')
   Call: (305) [system] char_type(')', space)
^  Redo: (304) [user] is_delimiter(')')
   Call: (305) [system] arg(_432090, v('(', ')', end_of_file), ')')
   Exit: (305) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (304) [user] is_delimiter(')')
   Call: (304) [system] _424584=[]
   Exit: (304) [system] []=[]
^  Exit: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (303) [system] _409712=[e]
   Exit: (303) [system] [e]=[e]
^  Exit: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e])
   Call: (302) [system] _394840=[s, e]
   Exit: (302) [system] [s, e]=[s, e]
^  Exit: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, e])
   Call: (301) [system] _379968=[l, s, e]
   Exit: (301) [system] [l, s, e]=[l, s, e]
^  Exit: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l, s, e])
   Call: (300) [system] _365096=[e, l, s, e]
   Exit: (300) [system] [e, l, s, e]=[e, l, s, e]
^  Exit: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, l, s, e])
^  Call: (299) [user] classify_and_convert_charseq($, [e, l, s, e], _325988)
^  Unify: (299) [user] classify_and_convert_charseq($, [e, l, s, e], '$VAR'(_449702))
   Call: (300) [system] atom_chars(_449702, ['_', e, l, s, e])
   Exit: (300) [system] atom_chars('_else', ['_', e, l, s, e])
^  Exit: (299) [user] classify_and_convert_charseq($, [e, l, s, e], _else)
^  Exit: (298) [user] read_symbolic(')', (0x55aefe44e2f0), $, _else)
^  Exit: (297) [user] cont_sexpr(')', (0x55aefe44e2f0), _else)
^  Call: (297) [user] read_list(')', (0x55aefe44e2f0), _455298)
^  Unify: (297) [user] read_list(')', (0x55aefe44e2f0), _455298)
^  Call: (298) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (298) [user] skip_spaces((0x55aefe44e2f0))
   Call: (299) [system] peek_char((0x55aefe44e2f0), _459012)
   Exit: (299) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (299) [system] ')'=(;)
^  Redo: (298) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (299) [user] is_like_space(')')
^  Unify: (299) [user] is_like_space(')')
   Call: (300) [system] char_type(')', 'white')
^  Redo: (299) [user] is_like_space(')')
^  Unify: (299) [user] is_like_space(')')
   Call: (300) [system] char_type(')', end_of_line)
^  Redo: (299) [user] is_like_space(')')
^  Unify: (299) [user] is_like_space(')')
   Call: (300) [system] char_type(')', space)
^  Redo: (299) [user] is_like_space(')')
^  Unify: (299) [user] is_like_space(')')
   Call: (300) [system] char_type(')', cntrl)
^  Redo: (298) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (298) [user] skip_spaces((0x55aefe44e2f0))
   Call: (298) [system] peek_char((0x55aefe44e2f0), _475796)
   Exit: (298) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (298) [system] ')'=')'
   Exit: (298) [system] ')'=')'
   Call: (298) [system] get_char((0x55aefe44e2f0), _479586)
   Exit: (298) [system] get_char((0x55aefe44e2f0), ')')
   Call: (298) [system] _455298=[]
   Exit: (298) [system] []=[]
^  Exit: (297) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (297) [system] _286702=[_else]
   Exit: (297) [system] [_else]=[_else]
^  Exit: (296) [user] read_list(')', (0x55aefe44e2f0), [_else])
   Call: (296) [system] _87508=[return, _else]
   Exit: (296) [system] [return, _else]=[return, _else]
^  Exit: (295) [user] read_list(')', (0x55aefe44e2f0), [return, _else])
^  Exit: (294) [user] cont_sexpr(')', (0x55aefe44e2f0), [return, _else])
^  Call: (294) [user] read_list(')', (0x55aefe44e2f0), _490674)
^  Unify: (294) [user] read_list(')', (0x55aefe44e2f0), _490674)
^  Call: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (295) [user] skip_spaces((0x55aefe44e2f0))
   Call: (296) [system] peek_char((0x55aefe44e2f0), _494388)
   Exit: (296) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (296) [system] '\n'=(;)
^  Redo: (295) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (296) [user] is_like_space('\n')
^  Unify: (296) [user] is_like_space('\n')
   Call: (297) [system] char_type('\n', 'white')
^  Redo: (296) [user] is_like_space('\n')
^  Unify: (296) [user] is_like_space('\n')
   Call: (297) [system] char_type('\n', end_of_line)
   Exit: (297) [system] char_type('\n', end_of_line)
^  Exit: (296) [user] is_like_space('\n')
   Call: (296) [system] get_char((0x55aefe44e2f0), _505700)
   Exit: (296) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (296) [user] skip_spaces((0x55aefe44e2f0))
   Call: (297) [system] peek_char((0x55aefe44e2f0), _509328)
   Exit: (297) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (297) [system] ' '=(;)
^  Redo: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (297) [user] is_like_space(' ')
^  Unify: (297) [user] is_like_space(' ')
   Call: (298) [system] char_type(' ', 'white')
   Exit: (298) [system] char_type(' ', 'white')
^  Exit: (297) [user] is_like_space(' ')
   Call: (297) [system] get_char((0x55aefe44e2f0), _517986)
   Exit: (297) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (297) [user] skip_spaces((0x55aefe44e2f0))
   Call: (298) [system] peek_char((0x55aefe44e2f0), _521614)
   Exit: (298) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (298) [system] ' '=(;)
^  Redo: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (298) [user] is_like_space(' ')
^  Unify: (298) [user] is_like_space(' ')
   Call: (299) [system] char_type(' ', 'white')
   Exit: (299) [system] char_type(' ', 'white')
^  Exit: (298) [user] is_like_space(' ')
   Call: (298) [system] get_char((0x55aefe44e2f0), _12598)
   Exit: (298) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (298) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (298) [user] skip_spaces((0x55aefe44e2f0))
   Call: (299) [system] peek_char((0x55aefe44e2f0), _16226)
   Exit: (299) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (299) [system] ' '=(;)
^  Redo: (298) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (299) [user] is_like_space(' ')
^  Unify: (299) [user] is_like_space(' ')
   Call: (300) [system] char_type(' ', 'white')
   Exit: (300) [system] char_type(' ', 'white')
^  Exit: (299) [user] is_like_space(' ')
   Call: (299) [system] get_char((0x55aefe44e2f0), _24884)
   Exit: (299) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (299) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (299) [user] skip_spaces((0x55aefe44e2f0))
   Call: (300) [system] peek_char((0x55aefe44e2f0), _28512)
   Exit: (300) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (300) [system] ' '=(;)
^  Redo: (299) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (300) [user] is_like_space(' ')
^  Unify: (300) [user] is_like_space(' ')
   Call: (301) [system] char_type(' ', 'white')
   Exit: (301) [system] char_type(' ', 'white')
^  Exit: (300) [user] is_like_space(' ')
   Call: (300) [system] get_char((0x55aefe44e2f0), _37170)
   Exit: (300) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (300) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (300) [user] skip_spaces((0x55aefe44e2f0))
   Call: (301) [system] peek_char((0x55aefe44e2f0), _40798)
   Exit: (301) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (301) [system] ' '=(;)
^  Redo: (300) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (301) [user] is_like_space(' ')
^  Unify: (301) [user] is_like_space(' ')
   Call: (302) [system] char_type(' ', 'white')
   Exit: (302) [system] char_type(' ', 'white')
^  Exit: (301) [user] is_like_space(' ')
   Call: (301) [system] get_char((0x55aefe44e2f0), _49456)
   Exit: (301) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (301) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (301) [user] skip_spaces((0x55aefe44e2f0))
   Call: (302) [system] peek_char((0x55aefe44e2f0), _53084)
   Exit: (302) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (302) [system] ' '=(;)
^  Redo: (301) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (302) [user] is_like_space(' ')
^  Unify: (302) [user] is_like_space(' ')
   Call: (303) [system] char_type(' ', 'white')
   Exit: (303) [system] char_type(' ', 'white')
^  Exit: (302) [user] is_like_space(' ')
   Call: (302) [system] get_char((0x55aefe44e2f0), _61742)
   Exit: (302) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (302) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (302) [user] skip_spaces((0x55aefe44e2f0))
   Call: (303) [system] peek_char((0x55aefe44e2f0), _65370)
   Exit: (303) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (303) [system] ' '=(;)
^  Redo: (302) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (303) [user] is_like_space(' ')
^  Unify: (303) [user] is_like_space(' ')
   Call: (304) [system] char_type(' ', 'white')
   Exit: (304) [system] char_type(' ', 'white')
^  Exit: (303) [user] is_like_space(' ')
   Call: (303) [system] get_char((0x55aefe44e2f0), _74028)
   Exit: (303) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (303) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (303) [user] skip_spaces((0x55aefe44e2f0))
   Call: (304) [system] peek_char((0x55aefe44e2f0), _77656)
   Exit: (304) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (304) [system] ' '=(;)
^  Redo: (303) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (304) [user] is_like_space(' ')
^  Unify: (304) [user] is_like_space(' ')
   Call: (305) [system] char_type(' ', 'white')
   Exit: (305) [system] char_type(' ', 'white')
^  Exit: (304) [user] is_like_space(' ')
   Call: (304) [system] get_char((0x55aefe44e2f0), _86314)
   Exit: (304) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (304) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (304) [user] skip_spaces((0x55aefe44e2f0))
   Call: (305) [system] peek_char((0x55aefe44e2f0), _89942)
   Exit: (305) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (305) [system] '('=(;)
^  Redo: (304) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (305) [user] is_like_space('(')
^  Unify: (305) [user] is_like_space('(')
   Call: (306) [system] char_type('(', 'white')
^  Redo: (305) [user] is_like_space('(')
^  Unify: (305) [user] is_like_space('(')
   Call: (306) [system] char_type('(', end_of_line)
^  Redo: (305) [user] is_like_space('(')
^  Unify: (305) [user] is_like_space('(')
   Call: (306) [system] char_type('(', space)
^  Redo: (305) [user] is_like_space('(')
^  Unify: (305) [user] is_like_space('(')
   Call: (306) [system] char_type('(', cntrl)
^  Redo: (304) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (304) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (303) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (302) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (301) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (300) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (299) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (298) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (295) [user] skip_spaces((0x55aefe44e2f0))
   Call: (295) [system] peek_char((0x55aefe44e2f0), _115042)
   Exit: (295) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (295) [system] '('=')'
^  Redo: (294) [user] read_list(')', (0x55aefe44e2f0), _6194)
   Call: (295) [system] '('=end_of_file
^  Redo: (294) [user] read_list(')', (0x55aefe44e2f0), _6194)
^  Call: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), _120620)
^  Unify: (295) [user] cont_sexpr(')', (0x55aefe44e2f0), _120620)
^  Call: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (296) [user] skip_spaces((0x55aefe44e2f0))
   Call: (297) [system] peek_char((0x55aefe44e2f0), _124334)
   Exit: (297) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (297) [system] '('=(;)
^  Redo: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (297) [user] is_like_space('(')
^  Unify: (297) [user] is_like_space('(')
   Call: (298) [system] char_type('(', 'white')
^  Redo: (297) [user] is_like_space('(')
^  Unify: (297) [user] is_like_space('(')
   Call: (298) [system] char_type('(', end_of_line)
^  Redo: (297) [user] is_like_space('(')
^  Unify: (297) [user] is_like_space('(')
   Call: (298) [system] char_type('(', space)
^  Redo: (297) [user] is_like_space('(')
^  Unify: (297) [user] is_like_space('(')
   Call: (298) [system] char_type('(', cntrl)
^  Redo: (296) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (296) [user] skip_spaces((0x55aefe44e2f0))
   Call: (296) [system] get_char((0x55aefe44e2f0), _141118)
   Exit: (296) [system] get_char((0x55aefe44e2f0), '(')
   Call: (296) [system] '('='('
   Exit: (296) [system] '('='('
^  Call: (296) [user] read_list(')', (0x55aefe44e2f0), _120620)
^  Unify: (296) [user] read_list(')', (0x55aefe44e2f0), _120620)
^  Call: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (297) [user] skip_spaces((0x55aefe44e2f0))
   Call: (298) [system] peek_char((0x55aefe44e2f0), _148544)
   Exit: (298) [system] peek_char((0x55aefe44e2f0), c)
   Call: (298) [system] c=(;)
^  Redo: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (298) [user] is_like_space(c)
^  Unify: (298) [user] is_like_space(c)
   Call: (299) [system] char_type(c, 'white')
^  Redo: (298) [user] is_like_space(c)
^  Unify: (298) [user] is_like_space(c)
   Call: (299) [system] char_type(c, end_of_line)
^  Redo: (298) [user] is_like_space(c)
^  Unify: (298) [user] is_like_space(c)
   Call: (299) [system] char_type(c, space)
^  Redo: (298) [user] is_like_space(c)
^  Unify: (298) [user] is_like_space(c)
   Call: (299) [system] char_type(c, cntrl)
^  Redo: (297) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (297) [user] skip_spaces((0x55aefe44e2f0))
   Call: (297) [system] peek_char((0x55aefe44e2f0), _165328)
   Exit: (297) [system] peek_char((0x55aefe44e2f0), c)
   Call: (297) [system] c=')'
^  Redo: (296) [user] read_list(')', (0x55aefe44e2f0), _120620)
   Call: (297) [system] c=end_of_file
^  Redo: (296) [user] read_list(')', (0x55aefe44e2f0), _120620)
^  Call: (297) [user] cont_sexpr(')', (0x55aefe44e2f0), _170906)
^  Unify: (297) [user] cont_sexpr(')', (0x55aefe44e2f0), _170906)
^  Call: (298) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (298) [user] skip_spaces((0x55aefe44e2f0))
   Call: (299) [system] peek_char((0x55aefe44e2f0), _174620)
   Exit: (299) [system] peek_char((0x55aefe44e2f0), c)
   Call: (299) [system] c=(;)
^  Redo: (298) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (299) [user] is_like_space(c)
^  Unify: (299) [user] is_like_space(c)
   Call: (300) [system] char_type(c, 'white')
^  Redo: (299) [user] is_like_space(c)
^  Unify: (299) [user] is_like_space(c)
   Call: (300) [system] char_type(c, end_of_line)
^  Redo: (299) [user] is_like_space(c)
^  Unify: (299) [user] is_like_space(c)
   Call: (300) [system] char_type(c, space)
^  Redo: (299) [user] is_like_space(c)
^  Unify: (299) [user] is_like_space(c)
   Call: (300) [system] char_type(c, cntrl)
^  Redo: (298) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (298) [user] skip_spaces((0x55aefe44e2f0))
   Call: (298) [system] get_char((0x55aefe44e2f0), _191404)
   Exit: (298) [system] get_char((0x55aefe44e2f0), c)
   Call: (298) [system] c='('
^  Redo: (297) [user] cont_sexpr(')', (0x55aefe44e2f0), _170906)
   Call: (298) [system] c='['
^  Redo: (297) [user] cont_sexpr(')', (0x55aefe44e2f0), _170906)
   Call: (298) [system] c='{'
^  Redo: (297) [user] cont_sexpr(')', (0x55aefe44e2f0), _170906)
   Call: (298) [system] c='"'
^  Redo: (297) [user] cont_sexpr(')', (0x55aefe44e2f0), _170906)
   Call: (298) [system] c=!
^  Redo: (297) [user] cont_sexpr(')', (0x55aefe44e2f0), _170906)
   Call: (298) [system] c='\''
^  Redo: (297) [user] cont_sexpr(')', (0x55aefe44e2f0), _170906)
   Call: (298) [system] c='`'
^  Redo: (297) [user] cont_sexpr(')', (0x55aefe44e2f0), _170906)
   Call: (298) [system] c=end_of_file
^  Redo: (297) [user] cont_sexpr(')', (0x55aefe44e2f0), _170906)
^  Call: (298) [user] read_symbolic(')', (0x55aefe44e2f0), c, _170906)
^  Unify: (298) [user] read_symbolic(')', (0x55aefe44e2f0), c, _170906)
^  Call: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _210014)
^  Unify: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _210014)
   Call: (300) [system] peek_char((0x55aefe44e2f0), _211880)
   Exit: (300) [system] peek_char((0x55aefe44e2f0), h)
^  Call: (300) [user] is_delimiter(h)
^  Unify: (300) [user] is_delimiter(h)
   Call: (301) [system] char_type(h, space)
^  Redo: (300) [user] is_delimiter(h)
   Call: (301) [system] arg(_217520, v('(', ')', end_of_file), h)
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _210014)
   Call: (300) [system] ')'==h
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _210014)
   Call: (300) [system] get_char((0x55aefe44e2f0), h)
   Exit: (300) [system] get_char((0x55aefe44e2f0), h)
   Call: (300) [system] h=(\)
^  Redo: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _210014)
^  Call: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _224886)
^  Unify: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _224886)
   Call: (301) [system] peek_char((0x55aefe44e2f0), _226752)
   Exit: (301) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (301) [user] is_delimiter(a)
^  Unify: (301) [user] is_delimiter(a)
   Call: (302) [system] char_type(a, space)
^  Redo: (301) [user] is_delimiter(a)
   Call: (302) [system] arg(_232392, v('(', ')', end_of_file), a)
^  Redo: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _224886)
   Call: (301) [system] ')'==a
^  Redo: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _224886)
   Call: (301) [system] get_char((0x55aefe44e2f0), a)
   Exit: (301) [system] get_char((0x55aefe44e2f0), a)
   Call: (301) [system] a=(\)
^  Redo: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _224886)
^  Call: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _239758)
^  Unify: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _239758)
   Call: (302) [system] peek_char((0x55aefe44e2f0), _241624)
   Exit: (302) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (302) [user] is_delimiter(i)
^  Unify: (302) [user] is_delimiter(i)
   Call: (303) [system] char_type(i, space)
^  Redo: (302) [user] is_delimiter(i)
   Call: (303) [system] arg(_247264, v('(', ')', end_of_file), i)
^  Redo: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _239758)
   Call: (302) [system] ')'==i
^  Redo: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _239758)
   Call: (302) [system] get_char((0x55aefe44e2f0), i)
   Exit: (302) [system] get_char((0x55aefe44e2f0), i)
   Call: (302) [system] i=(\)
^  Redo: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _239758)
^  Call: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _254630)
^  Unify: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _254630)
   Call: (303) [system] peek_char((0x55aefe44e2f0), _256496)
   Exit: (303) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (303) [user] is_delimiter(n)
^  Unify: (303) [user] is_delimiter(n)
   Call: (304) [system] char_type(n, space)
^  Redo: (303) [user] is_delimiter(n)
   Call: (304) [system] arg(_262136, v('(', ')', end_of_file), n)
^  Redo: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _254630)
   Call: (303) [system] ')'==n
^  Redo: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _254630)
   Call: (303) [system] get_char((0x55aefe44e2f0), n)
   Exit: (303) [system] get_char((0x55aefe44e2f0), n)
   Call: (303) [system] n=(\)
^  Redo: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _254630)
^  Call: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _269502)
^  Unify: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _269502)
   Call: (304) [system] peek_char((0x55aefe44e2f0), _271368)
   Exit: (304) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (304) [user] is_delimiter(' ')
^  Unify: (304) [user] is_delimiter(' ')
   Call: (305) [system] char_type(' ', space)
   Exit: (305) [system] char_type(' ', space)
^  Exit: (304) [user] is_delimiter(' ')
   Call: (304) [system] _269502=[]
   Exit: (304) [system] []=[]
^  Exit: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (303) [system] _254630=[n]
   Exit: (303) [system] [n]=[n]
^  Exit: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n])
   Call: (302) [system] _239758=[i, n]
   Exit: (302) [system] [i, n]=[i, n]
^  Exit: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, n])
   Call: (301) [system] _224886=[a, i, n]
   Exit: (301) [system] [a, i, n]=[a, i, n]
^  Exit: (300) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, i, n])
   Call: (300) [system] _210014=[h, a, i, n]
   Exit: (300) [system] [h, a, i, n]=[h, a, i, n]
^  Exit: (299) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [h, a, i, n])
^  Call: (299) [user] classify_and_convert_charseq(c, [h, a, i, n], _170906)
^  Unify: (299) [user] classify_and_convert_charseq(c, [h, a, i, n], _170906)
^  Call: (301) [system] setup_call_cleanup('$notrace'(_293710, _293712), once(user:catch(read_from_chars([c, h, a, i, n], _170906), _293686, fail)), '$restore_trace'(_293710, _293712))
^  Unify: (301) [system] setup_call_cleanup(system:'$notrace'(_293710, _293712), system:once(user:catch(read_from_chars([c, h, a, i, n], _170906), _293686, fail)), system:'$restore_trace'(_293710, _293712))
^  Call: (302) [system] sig_atomic(system:'$notrace'(_293710, _293712))
^  Exit: (301) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([c, h, a, i, n], chain), _293686, fail)), system:'$restore_trace'(3, -1))
   Call: (300) [system] atomic(chain)
   Exit: (300) [system] atomic(chain)
^  Exit: (299) [user] classify_and_convert_charseq(c, [h, a, i, n], chain)
^  Exit: (298) [user] read_symbolic(')', (0x55aefe44e2f0), c, chain)
^  Exit: (297) [user] cont_sexpr(')', (0x55aefe44e2f0), chain)
^  Call: (297) [user] read_list(')', (0x55aefe44e2f0), _302148)
^  Unify: (297) [user] read_list(')', (0x55aefe44e2f0), _302148)
^  Call: (298) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (298) [user] skip_spaces((0x55aefe44e2f0))
   Call: (299) [system] peek_char((0x55aefe44e2f0), _305862)
   Exit: (299) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (299) [system] ' '=(;)
^  Redo: (298) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (299) [user] is_like_space(' ')
^  Unify: (299) [user] is_like_space(' ')
   Call: (300) [system] char_type(' ', 'white')
   Exit: (300) [system] char_type(' ', 'white')
^  Exit: (299) [user] is_like_space(' ')
   Call: (299) [system] get_char((0x55aefe44e2f0), _314520)
   Exit: (299) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (299) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (299) [user] skip_spaces((0x55aefe44e2f0))
   Call: (300) [system] peek_char((0x55aefe44e2f0), _318148)
   Exit: (300) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (300) [system] '('=(;)
^  Redo: (299) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (300) [user] is_like_space('(')
^  Unify: (300) [user] is_like_space('(')
   Call: (301) [system] char_type('(', 'white')
^  Redo: (300) [user] is_like_space('(')
^  Unify: (300) [user] is_like_space('(')
   Call: (301) [system] char_type('(', end_of_line)
^  Redo: (300) [user] is_like_space('(')
^  Unify: (300) [user] is_like_space('(')
   Call: (301) [system] char_type('(', space)
^  Redo: (300) [user] is_like_space('(')
^  Unify: (300) [user] is_like_space('(')
   Call: (301) [system] char_type('(', cntrl)
^  Redo: (299) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (299) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (298) [user] skip_spaces((0x55aefe44e2f0))
   Call: (298) [system] peek_char((0x55aefe44e2f0), _335856)
   Exit: (298) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (298) [system] '('=')'
^  Redo: (297) [user] read_list(')', (0x55aefe44e2f0), _302148)
   Call: (298) [system] '('=end_of_file
^  Redo: (297) [user] read_list(')', (0x55aefe44e2f0), _302148)
^  Call: (298) [user] cont_sexpr(')', (0x55aefe44e2f0), _341434)
^  Unify: (298) [user] cont_sexpr(')', (0x55aefe44e2f0), _341434)
^  Call: (299) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (299) [user] skip_spaces((0x55aefe44e2f0))
   Call: (300) [system] peek_char((0x55aefe44e2f0), _345148)
   Exit: (300) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (300) [system] '('=(;)
^  Redo: (299) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (300) [user] is_like_space('(')
^  Unify: (300) [user] is_like_space('(')
   Call: (301) [system] char_type('(', 'white')
^  Redo: (300) [user] is_like_space('(')
^  Unify: (300) [user] is_like_space('(')
   Call: (301) [system] char_type('(', end_of_line)
^  Redo: (300) [user] is_like_space('(')
^  Unify: (300) [user] is_like_space('(')
   Call: (301) [system] char_type('(', space)
^  Redo: (300) [user] is_like_space('(')
^  Unify: (300) [user] is_like_space('(')
   Call: (301) [system] char_type('(', cntrl)
^  Redo: (299) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (299) [user] skip_spaces((0x55aefe44e2f0))
   Call: (299) [system] get_char((0x55aefe44e2f0), _361932)
   Exit: (299) [system] get_char((0x55aefe44e2f0), '(')
   Call: (299) [system] '('='('
   Exit: (299) [system] '('='('
^  Call: (299) [user] read_list(')', (0x55aefe44e2f0), _341434)
^  Unify: (299) [user] read_list(')', (0x55aefe44e2f0), _341434)
^  Call: (300) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (300) [user] skip_spaces((0x55aefe44e2f0))
   Call: (301) [system] peek_char((0x55aefe44e2f0), _369358)
   Exit: (301) [system] peek_char((0x55aefe44e2f0), d)
   Call: (301) [system] d=(;)
^  Redo: (300) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (301) [user] is_like_space(d)
^  Unify: (301) [user] is_like_space(d)
   Call: (302) [system] char_type(d, 'white')
^  Redo: (301) [user] is_like_space(d)
^  Unify: (301) [user] is_like_space(d)
   Call: (302) [system] char_type(d, end_of_line)
^  Redo: (301) [user] is_like_space(d)
^  Unify: (301) [user] is_like_space(d)
   Call: (302) [system] char_type(d, space)
^  Redo: (301) [user] is_like_space(d)
^  Unify: (301) [user] is_like_space(d)
   Call: (302) [system] char_type(d, cntrl)
^  Redo: (300) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (300) [user] skip_spaces((0x55aefe44e2f0))
   Call: (300) [system] peek_char((0x55aefe44e2f0), _386142)
   Exit: (300) [system] peek_char((0x55aefe44e2f0), d)
   Call: (300) [system] d=')'
^  Redo: (299) [user] read_list(')', (0x55aefe44e2f0), _341434)
   Call: (300) [system] d=end_of_file
^  Redo: (299) [user] read_list(')', (0x55aefe44e2f0), _341434)
^  Call: (300) [user] cont_sexpr(')', (0x55aefe44e2f0), _391720)
^  Unify: (300) [user] cont_sexpr(')', (0x55aefe44e2f0), _391720)
^  Call: (301) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (301) [user] skip_spaces((0x55aefe44e2f0))
   Call: (302) [system] peek_char((0x55aefe44e2f0), _395434)
   Exit: (302) [system] peek_char((0x55aefe44e2f0), d)
   Call: (302) [system] d=(;)
^  Redo: (301) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (302) [user] is_like_space(d)
^  Unify: (302) [user] is_like_space(d)
   Call: (303) [system] char_type(d, 'white')
^  Redo: (302) [user] is_like_space(d)
^  Unify: (302) [user] is_like_space(d)
   Call: (303) [system] char_type(d, end_of_line)
^  Redo: (302) [user] is_like_space(d)
^  Unify: (302) [user] is_like_space(d)
   Call: (303) [system] char_type(d, space)
^  Redo: (302) [user] is_like_space(d)
^  Unify: (302) [user] is_like_space(d)
   Call: (303) [system] char_type(d, cntrl)
^  Redo: (301) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (301) [user] skip_spaces((0x55aefe44e2f0))
   Call: (301) [system] get_char((0x55aefe44e2f0), _412218)
   Exit: (301) [system] get_char((0x55aefe44e2f0), d)
   Call: (301) [system] d='('
^  Redo: (300) [user] cont_sexpr(')', (0x55aefe44e2f0), _391720)
   Call: (301) [system] d='['
^  Redo: (300) [user] cont_sexpr(')', (0x55aefe44e2f0), _391720)
   Call: (301) [system] d='{'
^  Redo: (300) [user] cont_sexpr(')', (0x55aefe44e2f0), _391720)
   Call: (301) [system] d='"'
^  Redo: (300) [user] cont_sexpr(')', (0x55aefe44e2f0), _391720)
   Call: (301) [system] d=!
^  Redo: (300) [user] cont_sexpr(')', (0x55aefe44e2f0), _391720)
   Call: (301) [system] d='\''
^  Redo: (300) [user] cont_sexpr(')', (0x55aefe44e2f0), _391720)
   Call: (301) [system] d='`'
^  Redo: (300) [user] cont_sexpr(')', (0x55aefe44e2f0), _391720)
   Call: (301) [system] d=end_of_file
^  Redo: (300) [user] cont_sexpr(')', (0x55aefe44e2f0), _391720)
^  Call: (301) [user] read_symbolic(')', (0x55aefe44e2f0), d, _391720)
^  Unify: (301) [user] read_symbolic(')', (0x55aefe44e2f0), d, _391720)
^  Call: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430828)
^  Unify: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430828)
   Call: (303) [system] peek_char((0x55aefe44e2f0), _432694)
   Exit: (303) [system] peek_char((0x55aefe44e2f0), e)
^  Call: (303) [user] is_delimiter(e)
^  Unify: (303) [user] is_delimiter(e)
   Call: (304) [system] char_type(e, space)
^  Redo: (303) [user] is_delimiter(e)
   Call: (304) [system] arg(_438334, v('(', ')', end_of_file), e)
^  Redo: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430828)
   Call: (303) [system] ')'==e
^  Redo: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430828)
   Call: (303) [system] get_char((0x55aefe44e2f0), e)
   Exit: (303) [system] get_char((0x55aefe44e2f0), e)
   Call: (303) [system] e=(\)
^  Redo: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _430828)
^  Call: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445700)
^  Unify: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445700)
   Call: (304) [system] peek_char((0x55aefe44e2f0), _447566)
   Exit: (304) [system] peek_char((0x55aefe44e2f0), c)
^  Call: (304) [user] is_delimiter(c)
^  Unify: (304) [user] is_delimiter(c)
   Call: (305) [system] char_type(c, space)
^  Redo: (304) [user] is_delimiter(c)
   Call: (305) [system] arg(_453206, v('(', ')', end_of_file), c)
^  Redo: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445700)
   Call: (304) [system] ')'==c
^  Redo: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445700)
   Call: (304) [system] get_char((0x55aefe44e2f0), c)
   Exit: (304) [system] get_char((0x55aefe44e2f0), c)
   Call: (304) [system] c=(\)
^  Redo: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _445700)
^  Call: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _460572)
^  Unify: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _460572)
   Call: (305) [system] peek_char((0x55aefe44e2f0), _462438)
   Exit: (305) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (305) [user] is_delimiter(o)
^  Unify: (305) [user] is_delimiter(o)
   Call: (306) [system] char_type(o, space)
^  Redo: (305) [user] is_delimiter(o)
   Call: (306) [system] arg(_468078, v('(', ')', end_of_file), o)
^  Redo: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _460572)
   Call: (305) [system] ')'==o
^  Redo: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _460572)
   Call: (305) [system] get_char((0x55aefe44e2f0), o)
   Exit: (305) [system] get_char((0x55aefe44e2f0), o)
   Call: (305) [system] o=(\)
^  Redo: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _460572)
^  Call: (305) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _475444)
^  Unify: (305) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _475444)
   Call: (306) [system] peek_char((0x55aefe44e2f0), _477310)
   Exit: (306) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (306) [user] is_delimiter(n)
^  Unify: (306) [user] is_delimiter(n)
   Call: (307) [system] char_type(n, space)
^  Redo: (306) [user] is_delimiter(n)
   Call: (307) [system] arg(_482950, v('(', ')', end_of_file), n)
^  Redo: (305) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _475444)
   Call: (306) [system] ')'==n
^  Redo: (305) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _475444)
   Call: (306) [system] get_char((0x55aefe44e2f0), n)
   Exit: (306) [system] get_char((0x55aefe44e2f0), n)
   Call: (306) [system] n=(\)
^  Redo: (305) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _475444)
^  Call: (306) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _490316)
^  Unify: (306) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _490316)
   Call: (307) [system] peek_char((0x55aefe44e2f0), _492182)
   Exit: (307) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (307) [user] is_delimiter(s)
^  Unify: (307) [user] is_delimiter(s)
   Call: (308) [system] char_type(s, space)
^  Redo: (307) [user] is_delimiter(s)
   Call: (308) [system] arg(_497822, v('(', ')', end_of_file), s)
^  Redo: (306) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _490316)
   Call: (307) [system] ')'==s
^  Redo: (306) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _490316)
   Call: (307) [system] get_char((0x55aefe44e2f0), s)
   Exit: (307) [system] get_char((0x55aefe44e2f0), s)
   Call: (307) [system] s=(\)
^  Redo: (306) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _490316)
^  Call: (307) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _505188)
^  Unify: (307) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _505188)
   Call: (308) [system] peek_char((0x55aefe44e2f0), _507054)
   Exit: (308) [system] peek_char((0x55aefe44e2f0), -)
^  Call: (308) [user] is_delimiter(-)
^  Unify: (308) [user] is_delimiter(-)
   Call: (309) [system] char_type(-, space)
^  Redo: (308) [user] is_delimiter(-)
   Call: (309) [system] arg(_512694, v('(', ')', end_of_file), -)
^  Redo: (307) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _505188)
   Call: (308) [system] ')'==(-)
^  Redo: (307) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _505188)
   Call: (308) [system] get_char((0x55aefe44e2f0), -)
   Exit: (308) [system] get_char((0x55aefe44e2f0), -)
   Call: (308) [system] (-)=(\)
^  Redo: (307) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _505188)
^  Call: (308) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _520060)
^  Unify: (308) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _520060)
   Call: (309) [system] peek_char((0x55aefe44e2f0), _521926)
   Exit: (309) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (309) [user] is_delimiter(a)
^  Unify: (309) [user] is_delimiter(a)
   Call: (310) [system] char_type(a, space)
^  Redo: (309) [user] is_delimiter(a)
   Call: (310) [system] arg(_9852, v('(', ')', end_of_file), a)
^  Redo: (308) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6244)
   Call: (309) [system] ')'==a
^  Redo: (308) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6244)
   Call: (309) [system] get_char((0x55aefe44e2f0), a)
   Exit: (309) [system] get_char((0x55aefe44e2f0), a)
   Call: (309) [system] a=(\)
^  Redo: (308) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _6244)
^  Call: (309) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _17218)
^  Unify: (309) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _17218)
   Call: (310) [system] peek_char((0x55aefe44e2f0), _19084)
   Exit: (310) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (310) [user] is_delimiter(t)
^  Unify: (310) [user] is_delimiter(t)
   Call: (311) [system] char_type(t, space)
^  Redo: (310) [user] is_delimiter(t)
   Call: (311) [system] arg(_24724, v('(', ')', end_of_file), t)
^  Redo: (309) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _17218)
   Call: (310) [system] ')'==t
^  Redo: (309) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _17218)
   Call: (310) [system] get_char((0x55aefe44e2f0), t)
   Exit: (310) [system] get_char((0x55aefe44e2f0), t)
   Call: (310) [system] t=(\)
^  Redo: (309) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _17218)
^  Call: (310) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _32090)
^  Unify: (310) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _32090)
   Call: (311) [system] peek_char((0x55aefe44e2f0), _33956)
   Exit: (311) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (311) [user] is_delimiter(o)
^  Unify: (311) [user] is_delimiter(o)
   Call: (312) [system] char_type(o, space)
^  Redo: (311) [user] is_delimiter(o)
   Call: (312) [system] arg(_39596, v('(', ')', end_of_file), o)
^  Redo: (310) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _32090)
   Call: (311) [system] ')'==o
^  Redo: (310) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _32090)
   Call: (311) [system] get_char((0x55aefe44e2f0), o)
   Exit: (311) [system] get_char((0x55aefe44e2f0), o)
   Call: (311) [system] o=(\)
^  Redo: (310) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _32090)
^  Call: (311) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _46962)
^  Unify: (311) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _46962)
   Call: (312) [system] peek_char((0x55aefe44e2f0), _48828)
   Exit: (312) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (312) [user] is_delimiter(m)
^  Unify: (312) [user] is_delimiter(m)
   Call: (313) [system] char_type(m, space)
^  Redo: (312) [user] is_delimiter(m)
   Call: (313) [system] arg(_54468, v('(', ')', end_of_file), m)
^  Redo: (311) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _46962)
   Call: (312) [system] ')'==m
^  Redo: (311) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _46962)
   Call: (312) [system] get_char((0x55aefe44e2f0), m)
   Exit: (312) [system] get_char((0x55aefe44e2f0), m)
   Call: (312) [system] m=(\)
^  Redo: (311) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _46962)
^  Call: (312) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _61834)
^  Unify: (312) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _61834)
   Call: (313) [system] peek_char((0x55aefe44e2f0), _63700)
   Exit: (313) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (313) [user] is_delimiter(' ')
^  Unify: (313) [user] is_delimiter(' ')
   Call: (314) [system] char_type(' ', space)
   Exit: (314) [system] char_type(' ', space)
^  Exit: (313) [user] is_delimiter(' ')
   Call: (313) [system] _61834=[]
   Exit: (313) [system] []=[]
^  Exit: (312) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (312) [system] _46962=[m]
   Exit: (312) [system] [m]=[m]
^  Exit: (311) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (311) [system] _32090=[o, m]
   Exit: (311) [system] [o, m]=[o, m]
^  Exit: (310) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (310) [system] _17218=[t, o, m]
   Exit: (310) [system] [t, o, m]=[t, o, m]
^  Exit: (309) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
   Call: (309) [system] _6244=[a, t, o, m]
   Exit: (309) [system] [a, t, o, m]=[a, t, o, m]
^  Exit: (308) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, t, o, m])
   Call: (308) [system] _6240=[-, a, t, o, m]
   Exit: (308) [system] [-, a, t, o, m]=[-, a, t, o, m]
^  Exit: (307) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [-, a, t, o, m])
   Call: (307) [system] _6236=[s, -, a, t, o, m]
   Exit: (307) [system] [s, -, a, t, o, m]=[s, -, a, t, o, m]
^  Exit: (306) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, -, a, t, o, m])
   Call: (306) [system] _6232=[n, s, -, a, t, o, m]
   Exit: (306) [system] [n, s, -, a, t, o, m]=[n, s, -, a, t, o, m]
^  Exit: (305) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n, s, -, a, t, o, m])
   Call: (305) [system] _6228=[o, n, s, -, a, t, o, m]
   Exit: (305) [system] [o, n, s, -, a, t, o, m]=[o, n, s, -, a, t, o, m]
^  Exit: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, n, s, -, a, t, o, m])
   Call: (304) [system] _6224=[c, o, n, s, -, a, t, o, m]
   Exit: (304) [system] [c, o, n, s, -, a, t, o, m]=[c, o, n, s, -, a, t, o, m]
^  Exit: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [c, o, n, s, -, a, t, o, m])
   Call: (303) [system] _6220=[e, c, o, n, s, -, a, t, o, m]
   Exit: (303) [system] [e, c, o, n, s, -, a, t, o, m]=[e, c, o, n, s, -, a, t, o, m]
^  Exit: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [e, c, o, n, s, -, a, t, o, m])
^  Call: (302) [user] classify_and_convert_charseq(d, [e, c, o, n, s, -, a, t, o, m], _6216)
^  Unify: (302) [user] classify_and_convert_charseq(d, [e, c, o, n, s, -, a, t, o, m], _6216)
^  Call: (304) [system] setup_call_cleanup('$notrace'(_102806, _102808), once(user:catch(read_from_chars([d, e, c, o, n, s, -, a, t, o, m], _6216), _102782, fail)), '$restore_trace'(_102806, _102808))
^  Unify: (304) [system] setup_call_cleanup(system:'$notrace'(_102806, _102808), system:once(user:catch(read_from_chars([d, e, c, o, n, s, -, a, t, o, m], _6216), _102782, fail)), system:'$restore_trace'(_102806, _102808))
^  Call: (305) [system] sig_atomic(system:'$notrace'(_102806, _102808))
^  Exit: (304) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([d, e, c, o, n, s, -, a, t, o, m], decons-atom), _102782, fail)), system:'$restore_trace'(3, -1))
   Call: (303) [system] atomic(decons-atom)
^  Redo: (302) [user] classify_and_convert_charseq(d, [e, c, o, n, s, -, a, t, o, m], _6216)
^  Unify: (302) [user] classify_and_convert_charseq(d, [e, c, o, n, s, -, a, t, o, m], _6216)
   Call: (303) [system] atom_chars(_6216, [d, e, c, o, n, s, -, a, t, o, m])
   Exit: (303) [system] atom_chars('decons-atom', [d, e, c, o, n, s, -, a, t, o, m])
^  Exit: (302) [user] classify_and_convert_charseq(d, [e, c, o, n, s, -, a, t, o, m], 'decons-atom')
^  Exit: (301) [user] read_symbolic(')', (0x55aefe44e2f0), d, 'decons-atom')
^  Exit: (300) [user] cont_sexpr(')', (0x55aefe44e2f0), 'decons-atom')
^  Call: (300) [user] read_list(')', (0x55aefe44e2f0), _114052)
^  Unify: (300) [user] read_list(')', (0x55aefe44e2f0), _114052)
^  Call: (301) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (301) [user] skip_spaces((0x55aefe44e2f0))
   Call: (302) [system] peek_char((0x55aefe44e2f0), _117766)
   Exit: (302) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (302) [system] ' '=(;)
^  Redo: (301) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (302) [user] is_like_space(' ')
^  Unify: (302) [user] is_like_space(' ')
   Call: (303) [system] char_type(' ', 'white')
   Exit: (303) [system] char_type(' ', 'white')
^  Exit: (302) [user] is_like_space(' ')
   Call: (302) [system] get_char((0x55aefe44e2f0), _126424)
   Exit: (302) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (302) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (302) [user] skip_spaces((0x55aefe44e2f0))
   Call: (303) [system] peek_char((0x55aefe44e2f0), _130052)
   Exit: (303) [system] peek_char((0x55aefe44e2f0), $)
   Call: (303) [system] ($)=(;)
^  Redo: (302) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (303) [user] is_like_space($)
^  Unify: (303) [user] is_like_space($)
   Call: (304) [system] char_type($, 'white')
^  Redo: (303) [user] is_like_space($)
^  Unify: (303) [user] is_like_space($)
   Call: (304) [system] char_type($, end_of_line)
^  Redo: (303) [user] is_like_space($)
^  Unify: (303) [user] is_like_space($)
   Call: (304) [system] char_type($, space)
^  Redo: (303) [user] is_like_space($)
^  Unify: (303) [user] is_like_space($)
   Call: (304) [system] char_type($, cntrl)
^  Redo: (302) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (302) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (301) [user] skip_spaces((0x55aefe44e2f0))
   Call: (301) [system] peek_char((0x55aefe44e2f0), _147760)
   Exit: (301) [system] peek_char((0x55aefe44e2f0), $)
   Call: (301) [system] ($)=')'
^  Redo: (300) [user] read_list(')', (0x55aefe44e2f0), _114052)
   Call: (301) [system] ($)=end_of_file
^  Redo: (300) [user] read_list(')', (0x55aefe44e2f0), _114052)
^  Call: (301) [user] cont_sexpr(')', (0x55aefe44e2f0), _153338)
^  Unify: (301) [user] cont_sexpr(')', (0x55aefe44e2f0), _153338)
^  Call: (302) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (302) [user] skip_spaces((0x55aefe44e2f0))
   Call: (303) [system] peek_char((0x55aefe44e2f0), _157052)
   Exit: (303) [system] peek_char((0x55aefe44e2f0), $)
   Call: (303) [system] ($)=(;)
^  Redo: (302) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (303) [user] is_like_space($)
^  Unify: (303) [user] is_like_space($)
   Call: (304) [system] char_type($, 'white')
^  Redo: (303) [user] is_like_space($)
^  Unify: (303) [user] is_like_space($)
   Call: (304) [system] char_type($, end_of_line)
^  Redo: (303) [user] is_like_space($)
^  Unify: (303) [user] is_like_space($)
   Call: (304) [system] char_type($, space)
^  Redo: (303) [user] is_like_space($)
^  Unify: (303) [user] is_like_space($)
   Call: (304) [system] char_type($, cntrl)
^  Redo: (302) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (302) [user] skip_spaces((0x55aefe44e2f0))
   Call: (302) [system] get_char((0x55aefe44e2f0), _173836)
   Exit: (302) [system] get_char((0x55aefe44e2f0), $)
   Call: (302) [system] ($)='('
^  Redo: (301) [user] cont_sexpr(')', (0x55aefe44e2f0), _153338)
   Call: (302) [system] ($)='['
^  Redo: (301) [user] cont_sexpr(')', (0x55aefe44e2f0), _153338)
   Call: (302) [system] ($)='{'
^  Redo: (301) [user] cont_sexpr(')', (0x55aefe44e2f0), _153338)
   Call: (302) [system] ($)='"'
^  Redo: (301) [user] cont_sexpr(')', (0x55aefe44e2f0), _153338)
   Call: (302) [system] ($)=!
^  Redo: (301) [user] cont_sexpr(')', (0x55aefe44e2f0), _153338)
   Call: (302) [system] ($)='\''
^  Redo: (301) [user] cont_sexpr(')', (0x55aefe44e2f0), _153338)
   Call: (302) [system] ($)='`'
^  Redo: (301) [user] cont_sexpr(')', (0x55aefe44e2f0), _153338)
   Call: (302) [system] ($)=end_of_file
^  Redo: (301) [user] cont_sexpr(')', (0x55aefe44e2f0), _153338)
^  Call: (302) [user] read_symbolic(')', (0x55aefe44e2f0), $, _153338)
^  Unify: (302) [user] read_symbolic(')', (0x55aefe44e2f0), $, _153338)
^  Call: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _192446)
^  Unify: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _192446)
   Call: (304) [system] peek_char((0x55aefe44e2f0), _194312)
   Exit: (304) [system] peek_char((0x55aefe44e2f0), a)
^  Call: (304) [user] is_delimiter(a)
^  Unify: (304) [user] is_delimiter(a)
   Call: (305) [system] char_type(a, space)
^  Redo: (304) [user] is_delimiter(a)
   Call: (305) [system] arg(_199952, v('(', ')', end_of_file), a)
^  Redo: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _192446)
   Call: (304) [system] ')'==a
^  Redo: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _192446)
   Call: (304) [system] get_char((0x55aefe44e2f0), a)
   Exit: (304) [system] get_char((0x55aefe44e2f0), a)
   Call: (304) [system] a=(\)
^  Redo: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _192446)
^  Call: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _207318)
^  Unify: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _207318)
   Call: (305) [system] peek_char((0x55aefe44e2f0), _209184)
   Exit: (305) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (305) [user] is_delimiter(t)
^  Unify: (305) [user] is_delimiter(t)
   Call: (306) [system] char_type(t, space)
^  Redo: (305) [user] is_delimiter(t)
   Call: (306) [system] arg(_214824, v('(', ')', end_of_file), t)
^  Redo: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _207318)
   Call: (305) [system] ')'==t
^  Redo: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _207318)
   Call: (305) [system] get_char((0x55aefe44e2f0), t)
   Exit: (305) [system] get_char((0x55aefe44e2f0), t)
   Call: (305) [system] t=(\)
^  Redo: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _207318)
^  Call: (305) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _222190)
^  Unify: (305) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _222190)
   Call: (306) [system] peek_char((0x55aefe44e2f0), _224056)
   Exit: (306) [system] peek_char((0x55aefe44e2f0), o)
^  Call: (306) [user] is_delimiter(o)
^  Unify: (306) [user] is_delimiter(o)
   Call: (307) [system] char_type(o, space)
^  Redo: (306) [user] is_delimiter(o)
   Call: (307) [system] arg(_229696, v('(', ')', end_of_file), o)
^  Redo: (305) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _222190)
   Call: (306) [system] ')'==o
^  Redo: (305) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _222190)
   Call: (306) [system] get_char((0x55aefe44e2f0), o)
   Exit: (306) [system] get_char((0x55aefe44e2f0), o)
   Call: (306) [system] o=(\)
^  Redo: (305) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _222190)
^  Call: (306) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237062)
^  Unify: (306) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237062)
   Call: (307) [system] peek_char((0x55aefe44e2f0), _238928)
   Exit: (307) [system] peek_char((0x55aefe44e2f0), m)
^  Call: (307) [user] is_delimiter(m)
^  Unify: (307) [user] is_delimiter(m)
   Call: (308) [system] char_type(m, space)
^  Redo: (307) [user] is_delimiter(m)
   Call: (308) [system] arg(_244568, v('(', ')', end_of_file), m)
^  Redo: (306) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237062)
   Call: (307) [system] ')'==m
^  Redo: (306) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237062)
   Call: (307) [system] get_char((0x55aefe44e2f0), m)
   Exit: (307) [system] get_char((0x55aefe44e2f0), m)
   Call: (307) [system] m=(\)
^  Redo: (306) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _237062)
^  Call: (307) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _251934)
^  Unify: (307) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _251934)
   Call: (308) [system] peek_char((0x55aefe44e2f0), _253800)
   Exit: (308) [system] peek_char((0x55aefe44e2f0), ')')
^  Call: (308) [user] is_delimiter(')')
^  Unify: (308) [user] is_delimiter(')')
   Call: (309) [system] char_type(')', space)
^  Redo: (308) [user] is_delimiter(')')
   Call: (309) [system] arg(_259440, v('(', ')', end_of_file), ')')
   Exit: (309) [system] arg(2, v('(', ')', end_of_file), ')')
^  Exit: (308) [user] is_delimiter(')')
   Call: (308) [system] _251934=[]
   Exit: (308) [system] []=[]
^  Exit: (307) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (307) [system] _237062=[m]
   Exit: (307) [system] [m]=[m]
^  Exit: (306) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [m])
   Call: (306) [system] _222190=[o, m]
   Exit: (306) [system] [o, m]=[o, m]
^  Exit: (305) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [o, m])
   Call: (305) [system] _207318=[t, o, m]
   Exit: (305) [system] [t, o, m]=[t, o, m]
^  Exit: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t, o, m])
   Call: (304) [system] _192446=[a, t, o, m]
   Exit: (304) [system] [a, t, o, m]=[a, t, o, m]
^  Exit: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [a, t, o, m])
^  Call: (303) [user] classify_and_convert_charseq($, [a, t, o, m], _153338)
^  Unify: (303) [user] classify_and_convert_charseq($, [a, t, o, m], '$VAR'(_277052))
   Call: (304) [system] atom_chars(_277052, ['_', a, t, o, m])
   Exit: (304) [system] atom_chars('_atom', ['_', a, t, o, m])
^  Exit: (303) [user] classify_and_convert_charseq($, [a, t, o, m], _atom)
^  Exit: (302) [user] read_symbolic(')', (0x55aefe44e2f0), $, _atom)
^  Exit: (301) [user] cont_sexpr(')', (0x55aefe44e2f0), _atom)
^  Call: (301) [user] read_list(')', (0x55aefe44e2f0), _282648)
^  Unify: (301) [user] read_list(')', (0x55aefe44e2f0), _282648)
^  Call: (302) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (302) [user] skip_spaces((0x55aefe44e2f0))
   Call: (303) [system] peek_char((0x55aefe44e2f0), _286362)
   Exit: (303) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (303) [system] ')'=(;)
^  Redo: (302) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (303) [user] is_like_space(')')
^  Unify: (303) [user] is_like_space(')')
   Call: (304) [system] char_type(')', 'white')
^  Redo: (303) [user] is_like_space(')')
^  Unify: (303) [user] is_like_space(')')
   Call: (304) [system] char_type(')', end_of_line)
^  Redo: (303) [user] is_like_space(')')
^  Unify: (303) [user] is_like_space(')')
   Call: (304) [system] char_type(')', space)
^  Redo: (303) [user] is_like_space(')')
^  Unify: (303) [user] is_like_space(')')
   Call: (304) [system] char_type(')', cntrl)
^  Redo: (302) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (302) [user] skip_spaces((0x55aefe44e2f0))
   Call: (302) [system] peek_char((0x55aefe44e2f0), _303146)
   Exit: (302) [system] peek_char((0x55aefe44e2f0), ')')
   Call: (302) [system] ')'=')'
   Exit: (302) [system] ')'=')'
   Call: (302) [system] get_char((0x55aefe44e2f0), _306936)
   Exit: (302) [system] get_char((0x55aefe44e2f0), ')')
   Call: (302) [system] _282648=[]
   Exit: (302) [system] []=[]
^  Exit: (301) [user] read_list(')', (0x55aefe44e2f0), [])
   Call: (301) [system] _114052=[_atom]
   Exit: (301) [system] [_atom]=[_atom]
^  Exit: (300) [user] read_list(')', (0x55aefe44e2f0), [_atom])
   Call: (300) [system] _6210=['decons-atom', _atom]
   Exit: (300) [system] ['decons-atom', _atom]=['decons-atom', _atom]
^  Exit: (299) [user] read_list(')', (0x55aefe44e2f0), ['decons-atom', _atom])
^  Exit: (298) [user] cont_sexpr(')', (0x55aefe44e2f0), ['decons-atom', _atom])
^  Call: (298) [user] read_list(')', (0x55aefe44e2f0), _318024)
^  Unify: (298) [user] read_list(')', (0x55aefe44e2f0), _318024)
^  Call: (299) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (299) [user] skip_spaces((0x55aefe44e2f0))
   Call: (300) [system] peek_char((0x55aefe44e2f0), _321738)
   Exit: (300) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (300) [system] ' '=(;)
^  Redo: (299) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (300) [user] is_like_space(' ')
^  Unify: (300) [user] is_like_space(' ')
   Call: (301) [system] char_type(' ', 'white')
   Exit: (301) [system] char_type(' ', 'white')
^  Exit: (300) [user] is_like_space(' ')
   Call: (300) [system] get_char((0x55aefe44e2f0), _330396)
   Exit: (300) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (300) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (300) [user] skip_spaces((0x55aefe44e2f0))
   Call: (301) [system] peek_char((0x55aefe44e2f0), _334024)
   Exit: (301) [system] peek_char((0x55aefe44e2f0), $)
   Call: (301) [system] ($)=(;)
^  Redo: (300) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (301) [user] is_like_space($)
^  Unify: (301) [user] is_like_space($)
   Call: (302) [system] char_type($, 'white')
^  Redo: (301) [user] is_like_space($)
^  Unify: (301) [user] is_like_space($)
   Call: (302) [system] char_type($, end_of_line)
^  Redo: (301) [user] is_like_space($)
^  Unify: (301) [user] is_like_space($)
   Call: (302) [system] char_type($, space)
^  Redo: (301) [user] is_like_space($)
^  Unify: (301) [user] is_like_space($)
   Call: (302) [system] char_type($, cntrl)
^  Redo: (300) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (300) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (299) [user] skip_spaces((0x55aefe44e2f0))
   Call: (299) [system] peek_char((0x55aefe44e2f0), _351732)
   Exit: (299) [system] peek_char((0x55aefe44e2f0), $)
   Call: (299) [system] ($)=')'
^  Redo: (298) [user] read_list(')', (0x55aefe44e2f0), _318024)
   Call: (299) [system] ($)=end_of_file
^  Redo: (298) [user] read_list(')', (0x55aefe44e2f0), _318024)
^  Call: (299) [user] cont_sexpr(')', (0x55aefe44e2f0), _357310)
^  Unify: (299) [user] cont_sexpr(')', (0x55aefe44e2f0), _357310)
^  Call: (300) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (300) [user] skip_spaces((0x55aefe44e2f0))
   Call: (301) [system] peek_char((0x55aefe44e2f0), _361024)
   Exit: (301) [system] peek_char((0x55aefe44e2f0), $)
   Call: (301) [system] ($)=(;)
^  Redo: (300) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (301) [user] is_like_space($)
^  Unify: (301) [user] is_like_space($)
   Call: (302) [system] char_type($, 'white')
^  Redo: (301) [user] is_like_space($)
^  Unify: (301) [user] is_like_space($)
   Call: (302) [system] char_type($, end_of_line)
^  Redo: (301) [user] is_like_space($)
^  Unify: (301) [user] is_like_space($)
   Call: (302) [system] char_type($, space)
^  Redo: (301) [user] is_like_space($)
^  Unify: (301) [user] is_like_space($)
   Call: (302) [system] char_type($, cntrl)
^  Redo: (300) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (300) [user] skip_spaces((0x55aefe44e2f0))
   Call: (300) [system] get_char((0x55aefe44e2f0), _377808)
   Exit: (300) [system] get_char((0x55aefe44e2f0), $)
   Call: (300) [system] ($)='('
^  Redo: (299) [user] cont_sexpr(')', (0x55aefe44e2f0), _357310)
   Call: (300) [system] ($)='['
^  Redo: (299) [user] cont_sexpr(')', (0x55aefe44e2f0), _357310)
   Call: (300) [system] ($)='{'
^  Redo: (299) [user] cont_sexpr(')', (0x55aefe44e2f0), _357310)
   Call: (300) [system] ($)='"'
^  Redo: (299) [user] cont_sexpr(')', (0x55aefe44e2f0), _357310)
   Call: (300) [system] ($)=!
^  Redo: (299) [user] cont_sexpr(')', (0x55aefe44e2f0), _357310)
   Call: (300) [system] ($)='\''
^  Redo: (299) [user] cont_sexpr(')', (0x55aefe44e2f0), _357310)
   Call: (300) [system] ($)='`'
^  Redo: (299) [user] cont_sexpr(')', (0x55aefe44e2f0), _357310)
   Call: (300) [system] ($)=end_of_file
^  Redo: (299) [user] cont_sexpr(')', (0x55aefe44e2f0), _357310)
^  Call: (300) [user] read_symbolic(')', (0x55aefe44e2f0), $, _357310)
^  Unify: (300) [user] read_symbolic(')', (0x55aefe44e2f0), $, _357310)
^  Call: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _396418)
^  Unify: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _396418)
   Call: (302) [system] peek_char((0x55aefe44e2f0), _398284)
   Exit: (302) [system] peek_char((0x55aefe44e2f0), l)
^  Call: (302) [user] is_delimiter(l)
^  Unify: (302) [user] is_delimiter(l)
   Call: (303) [system] char_type(l, space)
^  Redo: (302) [user] is_delimiter(l)
   Call: (303) [system] arg(_403924, v('(', ')', end_of_file), l)
^  Redo: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _396418)
   Call: (302) [system] ')'==l
^  Redo: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _396418)
   Call: (302) [system] get_char((0x55aefe44e2f0), l)
   Exit: (302) [system] get_char((0x55aefe44e2f0), l)
   Call: (302) [system] l=(\)
^  Redo: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _396418)
^  Call: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _411290)
^  Unify: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _411290)
   Call: (303) [system] peek_char((0x55aefe44e2f0), _413156)
   Exit: (303) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (303) [user] is_delimiter(i)
^  Unify: (303) [user] is_delimiter(i)
   Call: (304) [system] char_type(i, space)
^  Redo: (303) [user] is_delimiter(i)
   Call: (304) [system] arg(_418796, v('(', ')', end_of_file), i)
^  Redo: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _411290)
   Call: (303) [system] ')'==i
^  Redo: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _411290)
   Call: (303) [system] get_char((0x55aefe44e2f0), i)
   Exit: (303) [system] get_char((0x55aefe44e2f0), i)
   Call: (303) [system] i=(\)
^  Redo: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _411290)
^  Call: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _426162)
^  Unify: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _426162)
   Call: (304) [system] peek_char((0x55aefe44e2f0), _428028)
   Exit: (304) [system] peek_char((0x55aefe44e2f0), s)
^  Call: (304) [user] is_delimiter(s)
^  Unify: (304) [user] is_delimiter(s)
   Call: (305) [system] char_type(s, space)
^  Redo: (304) [user] is_delimiter(s)
   Call: (305) [system] arg(_433668, v('(', ')', end_of_file), s)
^  Redo: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _426162)
   Call: (304) [system] ')'==s
^  Redo: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _426162)
   Call: (304) [system] get_char((0x55aefe44e2f0), s)
   Exit: (304) [system] get_char((0x55aefe44e2f0), s)
   Call: (304) [system] s=(\)
^  Redo: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _426162)
^  Call: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _441034)
^  Unify: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _441034)
   Call: (305) [system] peek_char((0x55aefe44e2f0), _442900)
   Exit: (305) [system] peek_char((0x55aefe44e2f0), t)
^  Call: (305) [user] is_delimiter(t)
^  Unify: (305) [user] is_delimiter(t)
   Call: (306) [system] char_type(t, space)
^  Redo: (305) [user] is_delimiter(t)
   Call: (306) [system] arg(_448540, v('(', ')', end_of_file), t)
^  Redo: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _441034)
   Call: (305) [system] ')'==t
^  Redo: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _441034)
   Call: (305) [system] get_char((0x55aefe44e2f0), t)
   Exit: (305) [system] get_char((0x55aefe44e2f0), t)
   Call: (305) [system] t=(\)
^  Redo: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _441034)
^  Call: (305) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _455906)
^  Unify: (305) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _455906)
   Call: (306) [system] peek_char((0x55aefe44e2f0), _457772)
   Exit: (306) [system] peek_char((0x55aefe44e2f0), '\n')
^  Call: (306) [user] is_delimiter('\n')
^  Unify: (306) [user] is_delimiter('\n')
   Call: (307) [system] char_type('\n', space)
   Exit: (307) [system] char_type('\n', space)
^  Exit: (306) [user] is_delimiter('\n')
   Call: (306) [system] _455906=[]
   Exit: (306) [system] []=[]
^  Exit: (305) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (305) [system] _441034=[t]
   Exit: (305) [system] [t]=[t]
^  Exit: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [t])
   Call: (304) [system] _426162=[s, t]
   Exit: (304) [system] [s, t]=[s, t]
^  Exit: (303) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [s, t])
   Call: (303) [system] _411290=[i, s, t]
   Exit: (303) [system] [i, s, t]=[i, s, t]
^  Exit: (302) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, s, t])
   Call: (302) [system] _396418=[l, i, s, t]
   Exit: (302) [system] [l, i, s, t]=[l, i, s, t]
^  Exit: (301) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [l, i, s, t])
^  Call: (301) [user] classify_and_convert_charseq($, [l, i, s, t], _357310)
^  Unify: (301) [user] classify_and_convert_charseq($, [l, i, s, t], '$VAR'(_479156))
   Call: (302) [system] atom_chars(_479156, ['_', l, i, s, t])
   Exit: (302) [system] atom_chars('_list', ['_', l, i, s, t])
^  Exit: (301) [user] classify_and_convert_charseq($, [l, i, s, t], _list)
^  Exit: (300) [user] read_symbolic(')', (0x55aefe44e2f0), $, _list)
^  Exit: (299) [user] cont_sexpr(')', (0x55aefe44e2f0), _list)
^  Call: (299) [user] read_list(')', (0x55aefe44e2f0), _484752)
^  Unify: (299) [user] read_list(')', (0x55aefe44e2f0), _484752)
^  Call: (300) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (300) [user] skip_spaces((0x55aefe44e2f0))
   Call: (301) [system] peek_char((0x55aefe44e2f0), _488466)
   Exit: (301) [system] peek_char((0x55aefe44e2f0), '\n')
   Call: (301) [system] '\n'=(;)
^  Redo: (300) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (301) [user] is_like_space('\n')
^  Unify: (301) [user] is_like_space('\n')
   Call: (302) [system] char_type('\n', 'white')
^  Redo: (301) [user] is_like_space('\n')
^  Unify: (301) [user] is_like_space('\n')
   Call: (302) [system] char_type('\n', end_of_line)
   Exit: (302) [system] char_type('\n', end_of_line)
^  Exit: (301) [user] is_like_space('\n')
   Call: (301) [system] get_char((0x55aefe44e2f0), _499778)
   Exit: (301) [system] get_char((0x55aefe44e2f0), '\n')
^  Call: (301) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (301) [user] skip_spaces((0x55aefe44e2f0))
   Call: (302) [system] peek_char((0x55aefe44e2f0), _503406)
   Exit: (302) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (302) [system] ' '=(;)
^  Redo: (301) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (302) [user] is_like_space(' ')
^  Unify: (302) [user] is_like_space(' ')
   Call: (303) [system] char_type(' ', 'white')
   Exit: (303) [system] char_type(' ', 'white')
^  Exit: (302) [user] is_like_space(' ')
   Call: (302) [system] get_char((0x55aefe44e2f0), _512064)
   Exit: (302) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (302) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (302) [user] skip_spaces((0x55aefe44e2f0))
   Call: (303) [system] peek_char((0x55aefe44e2f0), _515692)
   Exit: (303) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (303) [system] ' '=(;)
^  Redo: (302) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (303) [user] is_like_space(' ')
^  Unify: (303) [user] is_like_space(' ')
   Call: (304) [system] char_type(' ', 'white')
   Exit: (304) [system] char_type(' ', 'white')
^  Exit: (303) [user] is_like_space(' ')
   Call: (303) [system] get_char((0x55aefe44e2f0), _6672)
   Exit: (303) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (303) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (303) [user] skip_spaces((0x55aefe44e2f0))
   Call: (304) [system] peek_char((0x55aefe44e2f0), _10300)
   Exit: (304) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (304) [system] ' '=(;)
^  Redo: (303) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (304) [user] is_like_space(' ')
^  Unify: (304) [user] is_like_space(' ')
   Call: (305) [system] char_type(' ', 'white')
   Exit: (305) [system] char_type(' ', 'white')
^  Exit: (304) [user] is_like_space(' ')
   Call: (304) [system] get_char((0x55aefe44e2f0), _18958)
   Exit: (304) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (304) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (304) [user] skip_spaces((0x55aefe44e2f0))
   Call: (305) [system] peek_char((0x55aefe44e2f0), _22586)
   Exit: (305) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (305) [system] ' '=(;)
^  Redo: (304) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (305) [user] is_like_space(' ')
^  Unify: (305) [user] is_like_space(' ')
   Call: (306) [system] char_type(' ', 'white')
   Exit: (306) [system] char_type(' ', 'white')
^  Exit: (305) [user] is_like_space(' ')
   Call: (305) [system] get_char((0x55aefe44e2f0), _31244)
   Exit: (305) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (305) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (305) [user] skip_spaces((0x55aefe44e2f0))
   Call: (306) [system] peek_char((0x55aefe44e2f0), _34872)
   Exit: (306) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (306) [system] ' '=(;)
^  Redo: (305) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (306) [user] is_like_space(' ')
^  Unify: (306) [user] is_like_space(' ')
   Call: (307) [system] char_type(' ', 'white')
   Exit: (307) [system] char_type(' ', 'white')
^  Exit: (306) [user] is_like_space(' ')
   Call: (306) [system] get_char((0x55aefe44e2f0), _43530)
   Exit: (306) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (306) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (306) [user] skip_spaces((0x55aefe44e2f0))
   Call: (307) [system] peek_char((0x55aefe44e2f0), _47158)
   Exit: (307) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (307) [system] ' '=(;)
^  Redo: (306) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (307) [user] is_like_space(' ')
^  Unify: (307) [user] is_like_space(' ')
   Call: (308) [system] char_type(' ', 'white')
   Exit: (308) [system] char_type(' ', 'white')
^  Exit: (307) [user] is_like_space(' ')
   Call: (307) [system] get_char((0x55aefe44e2f0), _55816)
   Exit: (307) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (307) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (307) [user] skip_spaces((0x55aefe44e2f0))
   Call: (308) [system] peek_char((0x55aefe44e2f0), _59444)
   Exit: (308) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (308) [system] ' '=(;)
^  Redo: (307) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (308) [user] is_like_space(' ')
^  Unify: (308) [user] is_like_space(' ')
   Call: (309) [system] char_type(' ', 'white')
   Exit: (309) [system] char_type(' ', 'white')
^  Exit: (308) [user] is_like_space(' ')
   Call: (308) [system] get_char((0x55aefe44e2f0), _68102)
   Exit: (308) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (308) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (308) [user] skip_spaces((0x55aefe44e2f0))
   Call: (309) [system] peek_char((0x55aefe44e2f0), _71730)
   Exit: (309) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (309) [system] ' '=(;)
^  Redo: (308) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (309) [user] is_like_space(' ')
^  Unify: (309) [user] is_like_space(' ')
   Call: (310) [system] char_type(' ', 'white')
   Exit: (310) [system] char_type(' ', 'white')
^  Exit: (309) [user] is_like_space(' ')
   Call: (309) [system] get_char((0x55aefe44e2f0), _80388)
   Exit: (309) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (309) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (309) [user] skip_spaces((0x55aefe44e2f0))
   Call: (310) [system] peek_char((0x55aefe44e2f0), _84016)
   Exit: (310) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (310) [system] ' '=(;)
^  Redo: (309) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (310) [user] is_like_space(' ')
^  Unify: (310) [user] is_like_space(' ')
   Call: (311) [system] char_type(' ', 'white')
   Exit: (311) [system] char_type(' ', 'white')
^  Exit: (310) [user] is_like_space(' ')
   Call: (310) [system] get_char((0x55aefe44e2f0), _92674)
   Exit: (310) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (310) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (310) [user] skip_spaces((0x55aefe44e2f0))
   Call: (311) [system] peek_char((0x55aefe44e2f0), _96302)
   Exit: (311) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (311) [system] ' '=(;)
^  Redo: (310) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (311) [user] is_like_space(' ')
^  Unify: (311) [user] is_like_space(' ')
   Call: (312) [system] char_type(' ', 'white')
   Exit: (312) [system] char_type(' ', 'white')
^  Exit: (311) [user] is_like_space(' ')
   Call: (311) [system] get_char((0x55aefe44e2f0), _104960)
   Exit: (311) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (311) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (311) [user] skip_spaces((0x55aefe44e2f0))
   Call: (312) [system] peek_char((0x55aefe44e2f0), _108588)
   Exit: (312) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (312) [system] '('=(;)
^  Redo: (311) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (312) [user] is_like_space('(')
^  Unify: (312) [user] is_like_space('(')
   Call: (313) [system] char_type('(', 'white')
^  Redo: (312) [user] is_like_space('(')
^  Unify: (312) [user] is_like_space('(')
   Call: (313) [system] char_type('(', end_of_line)
^  Redo: (312) [user] is_like_space('(')
^  Unify: (312) [user] is_like_space('(')
   Call: (313) [system] char_type('(', space)
^  Redo: (312) [user] is_like_space('(')
^  Unify: (312) [user] is_like_space('(')
   Call: (313) [system] char_type('(', cntrl)
^  Redo: (311) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (311) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (310) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (309) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (308) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (307) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (306) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (305) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (304) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (303) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (302) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (301) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (300) [user] skip_spaces((0x55aefe44e2f0))
   Call: (300) [system] peek_char((0x55aefe44e2f0), _135536)
   Exit: (300) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (300) [system] '('=')'
^  Redo: (299) [user] read_list(')', (0x55aefe44e2f0), _6238)
   Call: (300) [system] '('=end_of_file
^  Redo: (299) [user] read_list(')', (0x55aefe44e2f0), _6238)
^  Call: (300) [user] cont_sexpr(')', (0x55aefe44e2f0), _141114)
^  Unify: (300) [user] cont_sexpr(')', (0x55aefe44e2f0), _141114)
^  Call: (301) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (301) [user] skip_spaces((0x55aefe44e2f0))
   Call: (302) [system] peek_char((0x55aefe44e2f0), _144828)
   Exit: (302) [system] peek_char((0x55aefe44e2f0), '(')
   Call: (302) [system] '('=(;)
^  Redo: (301) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (302) [user] is_like_space('(')
^  Unify: (302) [user] is_like_space('(')
   Call: (303) [system] char_type('(', 'white')
^  Redo: (302) [user] is_like_space('(')
^  Unify: (302) [user] is_like_space('(')
   Call: (303) [system] char_type('(', end_of_line)
^  Redo: (302) [user] is_like_space('(')
^  Unify: (302) [user] is_like_space('(')
   Call: (303) [system] char_type('(', space)
^  Redo: (302) [user] is_like_space('(')
^  Unify: (302) [user] is_like_space('(')
   Call: (303) [system] char_type('(', cntrl)
^  Redo: (301) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (301) [user] skip_spaces((0x55aefe44e2f0))
   Call: (301) [system] get_char((0x55aefe44e2f0), _161612)
   Exit: (301) [system] get_char((0x55aefe44e2f0), '(')
   Call: (301) [system] '('='('
   Exit: (301) [system] '('='('
^  Call: (301) [user] read_list(')', (0x55aefe44e2f0), _141114)
^  Unify: (301) [user] read_list(')', (0x55aefe44e2f0), _141114)
^  Call: (302) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (302) [user] skip_spaces((0x55aefe44e2f0))
   Call: (303) [system] peek_char((0x55aefe44e2f0), _169038)
   Exit: (303) [system] peek_char((0x55aefe44e2f0), u)
   Call: (303) [system] u=(;)
^  Redo: (302) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (303) [user] is_like_space(u)
^  Unify: (303) [user] is_like_space(u)
   Call: (304) [system] char_type(u, 'white')
^  Redo: (303) [user] is_like_space(u)
^  Unify: (303) [user] is_like_space(u)
   Call: (304) [system] char_type(u, end_of_line)
^  Redo: (303) [user] is_like_space(u)
^  Unify: (303) [user] is_like_space(u)
   Call: (304) [system] char_type(u, space)
^  Redo: (303) [user] is_like_space(u)
^  Unify: (303) [user] is_like_space(u)
   Call: (304) [system] char_type(u, cntrl)
^  Redo: (302) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (302) [user] skip_spaces((0x55aefe44e2f0))
   Call: (302) [system] peek_char((0x55aefe44e2f0), _185822)
   Exit: (302) [system] peek_char((0x55aefe44e2f0), u)
   Call: (302) [system] u=')'
^  Redo: (301) [user] read_list(')', (0x55aefe44e2f0), _141114)
   Call: (302) [system] u=end_of_file
^  Redo: (301) [user] read_list(')', (0x55aefe44e2f0), _141114)
^  Call: (302) [user] cont_sexpr(')', (0x55aefe44e2f0), _191400)
^  Unify: (302) [user] cont_sexpr(')', (0x55aefe44e2f0), _191400)
^  Call: (303) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (303) [user] skip_spaces((0x55aefe44e2f0))
   Call: (304) [system] peek_char((0x55aefe44e2f0), _195114)
   Exit: (304) [system] peek_char((0x55aefe44e2f0), u)
   Call: (304) [system] u=(;)
^  Redo: (303) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (304) [user] is_like_space(u)
^  Unify: (304) [user] is_like_space(u)
   Call: (305) [system] char_type(u, 'white')
^  Redo: (304) [user] is_like_space(u)
^  Unify: (304) [user] is_like_space(u)
   Call: (305) [system] char_type(u, end_of_line)
^  Redo: (304) [user] is_like_space(u)
^  Unify: (304) [user] is_like_space(u)
   Call: (305) [system] char_type(u, space)
^  Redo: (304) [user] is_like_space(u)
^  Unify: (304) [user] is_like_space(u)
   Call: (305) [system] char_type(u, cntrl)
^  Redo: (303) [user] skip_spaces((0x55aefe44e2f0))
^  Exit: (303) [user] skip_spaces((0x55aefe44e2f0))
   Call: (303) [system] get_char((0x55aefe44e2f0), _211898)
   Exit: (303) [system] get_char((0x55aefe44e2f0), u)
   Call: (303) [system] u='('
^  Redo: (302) [user] cont_sexpr(')', (0x55aefe44e2f0), _191400)
   Call: (303) [system] u='['
^  Redo: (302) [user] cont_sexpr(')', (0x55aefe44e2f0), _191400)
   Call: (303) [system] u='{'
^  Redo: (302) [user] cont_sexpr(')', (0x55aefe44e2f0), _191400)
   Call: (303) [system] u='"'
^  Redo: (302) [user] cont_sexpr(')', (0x55aefe44e2f0), _191400)
   Call: (303) [system] u=!
^  Redo: (302) [user] cont_sexpr(')', (0x55aefe44e2f0), _191400)
   Call: (303) [system] u='\''
^  Redo: (302) [user] cont_sexpr(')', (0x55aefe44e2f0), _191400)
   Call: (303) [system] u='`'
^  Redo: (302) [user] cont_sexpr(')', (0x55aefe44e2f0), _191400)
   Call: (303) [system] u=end_of_file
^  Redo: (302) [user] cont_sexpr(')', (0x55aefe44e2f0), _191400)
^  Call: (303) [user] read_symbolic(')', (0x55aefe44e2f0), u, _191400)
^  Unify: (303) [user] read_symbolic(')', (0x55aefe44e2f0), u, _191400)
^  Call: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _230508)
^  Unify: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _230508)
   Call: (305) [system] peek_char((0x55aefe44e2f0), _232374)
   Exit: (305) [system] peek_char((0x55aefe44e2f0), n)
^  Call: (305) [user] is_delimiter(n)
^  Unify: (305) [user] is_delimiter(n)
   Call: (306) [system] char_type(n, space)
^  Redo: (305) [user] is_delimiter(n)
   Call: (306) [system] arg(_238014, v('(', ')', end_of_file), n)
^  Redo: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _230508)
   Call: (305) [system] ')'==n
^  Redo: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _230508)
   Call: (305) [system] get_char((0x55aefe44e2f0), n)
   Exit: (305) [system] get_char((0x55aefe44e2f0), n)
   Call: (305) [system] n=(\)
^  Redo: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _230508)
^  Call: (305) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _245380)
^  Unify: (305) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _245380)
   Call: (306) [system] peek_char((0x55aefe44e2f0), _247246)
   Exit: (306) [system] peek_char((0x55aefe44e2f0), i)
^  Call: (306) [user] is_delimiter(i)
^  Unify: (306) [user] is_delimiter(i)
   Call: (307) [system] char_type(i, space)
^  Redo: (306) [user] is_delimiter(i)
   Call: (307) [system] arg(_252886, v('(', ')', end_of_file), i)
^  Redo: (305) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _245380)
   Call: (306) [system] ')'==i
^  Redo: (305) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _245380)
   Call: (306) [system] get_char((0x55aefe44e2f0), i)
   Exit: (306) [system] get_char((0x55aefe44e2f0), i)
   Call: (306) [system] i=(\)
^  Redo: (305) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _245380)
^  Call: (306) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _260252)
^  Unify: (306) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _260252)
   Call: (307) [system] peek_char((0x55aefe44e2f0), _262118)
   Exit: (307) [system] peek_char((0x55aefe44e2f0), f)
^  Call: (307) [user] is_delimiter(f)
^  Unify: (307) [user] is_delimiter(f)
   Call: (308) [system] char_type(f, space)
^  Redo: (307) [user] is_delimiter(f)
   Call: (308) [system] arg(_267758, v('(', ')', end_of_file), f)
^  Redo: (306) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _260252)
   Call: (307) [system] ')'==f
^  Redo: (306) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _260252)
   Call: (307) [system] get_char((0x55aefe44e2f0), f)
   Exit: (307) [system] get_char((0x55aefe44e2f0), f)
   Call: (307) [system] f=(\)
^  Redo: (306) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _260252)
^  Call: (307) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275124)
^  Unify: (307) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275124)
   Call: (308) [system] peek_char((0x55aefe44e2f0), _276990)
   Exit: (308) [system] peek_char((0x55aefe44e2f0), y)
^  Call: (308) [user] is_delimiter(y)
^  Unify: (308) [user] is_delimiter(y)
   Call: (309) [system] char_type(y, space)
^  Redo: (308) [user] is_delimiter(y)
   Call: (309) [system] arg(_282630, v('(', ')', end_of_file), y)
^  Redo: (307) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275124)
   Call: (308) [system] ')'==y
^  Redo: (307) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275124)
   Call: (308) [system] get_char((0x55aefe44e2f0), y)
   Exit: (308) [system] get_char((0x55aefe44e2f0), y)
   Call: (308) [system] y=(\)
^  Redo: (307) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _275124)
^  Call: (308) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _289996)
^  Unify: (308) [user] read_symbolic_cont(')', (0x55aefe44e2f0), _289996)
   Call: (309) [system] peek_char((0x55aefe44e2f0), _291862)
   Exit: (309) [system] peek_char((0x55aefe44e2f0), ' ')
^  Call: (309) [user] is_delimiter(' ')
^  Unify: (309) [user] is_delimiter(' ')
   Call: (310) [system] char_type(' ', space)
   Exit: (310) [system] char_type(' ', space)
^  Exit: (309) [user] is_delimiter(' ')
   Call: (309) [system] _289996=[]
   Exit: (309) [system] []=[]
^  Exit: (308) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [])
   Call: (308) [system] _275124=[y]
   Exit: (308) [system] [y]=[y]
^  Exit: (307) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [y])
   Call: (307) [system] _260252=[f, y]
   Exit: (307) [system] [f, y]=[f, y]
^  Exit: (306) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [f, y])
   Call: (306) [system] _245380=[i, f, y]
   Exit: (306) [system] [i, f, y]=[i, f, y]
^  Exit: (305) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [i, f, y])
   Call: (305) [system] _230508=[n, i, f, y]
   Exit: (305) [system] [n, i, f, y]=[n, i, f, y]
^  Exit: (304) [user] read_symbolic_cont(')', (0x55aefe44e2f0), [n, i, f, y])
^  Call: (304) [user] classify_and_convert_charseq(u, [n, i, f, y], _191400)
^  Unify: (304) [user] classify_and_convert_charseq(u, [n, i, f, y], _191400)
^  Call: (306) [system] setup_call_cleanup('$notrace'(_314204, _314206), once(user:catch(read_from_chars([u, n, i, f, y], _191400), _314180, fail)), '$restore_trace'(_314204, _314206))
^  Unify: (306) [system] setup_call_cleanup(system:'$notrace'(_314204, _314206), system:once(user:catch(read_from_chars([u, n, i, f, y], _191400), _314180, fail)), system:'$restore_trace'(_314204, _314206))
^  Call: (307) [system] sig_atomic(system:'$notrace'(_314204, _314206))
^  Exit: (306) [system] setup_call_cleanup(system:'$notrace'(3, -1), system:once(user:catch(read_from_chars([u, n, i, f, y], unify), _314180, fail)), system:'$restore_trace'(3, -1))
   Call: (305) [system] atomic(unify)
   Exit: (305) [system] atomic(unify)
^  Exit: (304) [user] classify_and_convert_charseq(u, [n, i, f, y], unify)
^  Exit: (303) [user] read_symbolic(')', (0x55aefe44e2f0), u, unify)
^  Exit: (302) [user] cont_sexpr(')', (0x55aefe44e2f0), unify)
^  Call: (302) [user] read_list(')', (0x55aefe44e2f0), _322642)
^  Unify: (302) [user] read_list(')', (0x55aefe44e2f0), _322642)
^  Call: (303) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (303) [user] skip_spaces((0x55aefe44e2f0))
   Call: (304) [system] peek_char((0x55aefe44e2f0), _326356)
   Exit: (304) [system] peek_char((0x55aefe44e2f0), ' ')
   Call: (304) [system] ' '=(;)
^  Redo: (303) [user] skip_spaces((0x55aefe44e2f0))
^  Call: (304) [user] is_like_space(' ')
^  Unify: (304) [user] is_like_space(' ')
   Call: (305) [system] char_type(' ', 'white')
   Exit: (305) [system] char_type(' ', 'white')
^  Exit: (304) [user] is_like_space(' ')
   Call: (304) [system] get_char((0x55aefe44e2f0), _335014)
   Exit: (304) [system] get_char((0x55aefe44e2f0), ' ')
^  Call: (304) [user] skip_spaces((0x55aefe44e2f0))
^  Unify: (304) [user] skip_spaces((0x55aefe44e2f0))
   Call: (305) [system] peek_char((0x55aefe44e2f0), _338642)
   Exit: (305) [system] peek_char((0x55aefe44e2f0), $)
   Call: (305) [system] ($)=(;)
^  Redo: (304) [user] skip_spaces((0x55aefe44e2f0))
Script done on 2024-10-03 00:51:11+00:00 [COMMAND_EXIT_CODE="143"]
\033[1;33mCompleted (EXITCODE=143) Under 40 seconds: ./mettalog '--output=./reports/tests_output/baseline-compat-2024-10-03T00:33:59/' --timeout=40 --html --repl=false --test "tests/more-anti-regression/minimal-metta/stdlib_minimal_test.metta" --halt=true\033[0m